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9542cb1f | 1 | /* Coding system handler (conversion, detection, etc). |
aaef169d | 2 | Copyright (C) 2001, 2002, 2003, 2004, 2005, |
8cabe764 | 3 | 2006, 2007, 2008 Free Software Foundation, Inc. |
7976eda0 | 4 | Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
8cabe764 | 5 | 2005, 2006, 2007, 2008 |
ce03bf76 KH |
6 | National Institute of Advanced Industrial Science and Technology (AIST) |
7 | Registration Number H14PRO021 | |
8f924df7 | 8 | Copyright (C) 2003 |
df7492f9 KH |
9 | National Institute of Advanced Industrial Science and Technology (AIST) |
10 | Registration Number H13PRO009 | |
4ed46869 | 11 | |
369314dc KH |
12 | This file is part of GNU Emacs. |
13 | ||
14 | GNU Emacs is free software; you can redistribute it and/or modify | |
15 | it under the terms of the GNU General Public License as published by | |
1427aa65 | 16 | the Free Software Foundation; either version 3, or (at your option) |
369314dc | 17 | any later version. |
4ed46869 | 18 | |
369314dc KH |
19 | GNU Emacs is distributed in the hope that it will be useful, |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
4ed46869 | 23 | |
369314dc KH |
24 | You should have received a copy of the GNU General Public License |
25 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
26 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
27 | Boston, MA 02110-1301, USA. */ | |
4ed46869 KH |
28 | |
29 | /*** TABLE OF CONTENTS *** | |
30 | ||
b73bfc1c | 31 | 0. General comments |
4ed46869 | 32 | 1. Preamble |
df7492f9 KH |
33 | 2. Emacs' internal format (emacs-utf-8) handlers |
34 | 3. UTF-8 handlers | |
35 | 4. UTF-16 handlers | |
36 | 5. Charset-base coding systems handlers | |
37 | 6. emacs-mule (old Emacs' internal format) handlers | |
38 | 7. ISO2022 handlers | |
39 | 8. Shift-JIS and BIG5 handlers | |
40 | 9. CCL handlers | |
41 | 10. C library functions | |
42 | 11. Emacs Lisp library functions | |
43 | 12. Postamble | |
4ed46869 KH |
44 | |
45 | */ | |
46 | ||
df7492f9 | 47 | /*** 0. General comments *** |
b73bfc1c KH |
48 | |
49 | ||
df7492f9 | 50 | CODING SYSTEM |
4ed46869 | 51 | |
5bad0796 DL |
52 | A coding system is an object for an encoding mechanism that contains |
53 | information about how to convert byte sequences to character | |
e19c3639 KH |
54 | sequences and vice versa. When we say "decode", it means converting |
55 | a byte sequence of a specific coding system into a character | |
56 | sequence that is represented by Emacs' internal coding system | |
57 | `emacs-utf-8', and when we say "encode", it means converting a | |
58 | character sequence of emacs-utf-8 to a byte sequence of a specific | |
0ef69138 | 59 | coding system. |
4ed46869 | 60 | |
e19c3639 KH |
61 | In Emacs Lisp, a coding system is represented by a Lisp symbol. In |
62 | C level, a coding system is represented by a vector of attributes | |
5bad0796 | 63 | stored in the hash table Vcharset_hash_table. The conversion from |
e19c3639 KH |
64 | coding system symbol to attributes vector is done by looking up |
65 | Vcharset_hash_table by the symbol. | |
4ed46869 | 66 | |
e19c3639 | 67 | Coding systems are classified into the following types depending on |
5bad0796 | 68 | the encoding mechanism. Here's a brief description of the types. |
4ed46869 | 69 | |
df7492f9 KH |
70 | o UTF-8 |
71 | ||
72 | o UTF-16 | |
73 | ||
74 | o Charset-base coding system | |
75 | ||
76 | A coding system defined by one or more (coded) character sets. | |
5bad0796 | 77 | Decoding and encoding are done by a code converter defined for each |
df7492f9 KH |
78 | character set. |
79 | ||
5bad0796 | 80 | o Old Emacs internal format (emacs-mule) |
df7492f9 | 81 | |
5bad0796 | 82 | The coding system adopted by old versions of Emacs (20 and 21). |
4ed46869 | 83 | |
df7492f9 | 84 | o ISO2022-base coding system |
4ed46869 KH |
85 | |
86 | The most famous coding system for multiple character sets. X's | |
df7492f9 KH |
87 | Compound Text, various EUCs (Extended Unix Code), and coding systems |
88 | used in the Internet communication such as ISO-2022-JP are all | |
89 | variants of ISO2022. | |
4ed46869 | 90 | |
df7492f9 | 91 | o SJIS (or Shift-JIS or MS-Kanji-Code) |
93dec019 | 92 | |
4ed46869 KH |
93 | A coding system to encode character sets: ASCII, JISX0201, and |
94 | JISX0208. Widely used for PC's in Japan. Details are described in | |
df7492f9 | 95 | section 8. |
4ed46869 | 96 | |
df7492f9 | 97 | o BIG5 |
4ed46869 | 98 | |
df7492f9 | 99 | A coding system to encode character sets: ASCII and Big5. Widely |
cfb43547 | 100 | used for Chinese (mainly in Taiwan and Hong Kong). Details are |
df7492f9 KH |
101 | described in section 8. In this file, when we write "big5" (all |
102 | lowercase), we mean the coding system, and when we write "Big5" | |
103 | (capitalized), we mean the character set. | |
4ed46869 | 104 | |
df7492f9 | 105 | o CCL |
27901516 | 106 | |
5bad0796 | 107 | If a user wants to decode/encode text encoded in a coding system |
df7492f9 KH |
108 | not listed above, he can supply a decoder and an encoder for it in |
109 | CCL (Code Conversion Language) programs. Emacs executes the CCL | |
110 | program while decoding/encoding. | |
27901516 | 111 | |
df7492f9 | 112 | o Raw-text |
4ed46869 | 113 | |
5a936b46 | 114 | A coding system for text containing raw eight-bit data. Emacs |
5bad0796 | 115 | treats each byte of source text as a character (except for |
df7492f9 | 116 | end-of-line conversion). |
4ed46869 | 117 | |
df7492f9 KH |
118 | o No-conversion |
119 | ||
120 | Like raw text, but don't do end-of-line conversion. | |
4ed46869 | 121 | |
4ed46869 | 122 | |
df7492f9 | 123 | END-OF-LINE FORMAT |
4ed46869 | 124 | |
5bad0796 | 125 | How text end-of-line is encoded depends on operating system. For |
df7492f9 | 126 | instance, Unix's format is just one byte of LF (line-feed) code, |
f4dee582 | 127 | whereas DOS's format is two-byte sequence of `carriage-return' and |
d46c5b12 KH |
128 | `line-feed' codes. MacOS's format is usually one byte of |
129 | `carriage-return'. | |
4ed46869 | 130 | |
cfb43547 | 131 | Since text character encoding and end-of-line encoding are |
df7492f9 KH |
132 | independent, any coding system described above can take any format |
133 | of end-of-line (except for no-conversion). | |
4ed46869 | 134 | |
e19c3639 KH |
135 | STRUCT CODING_SYSTEM |
136 | ||
137 | Before using a coding system for code conversion (i.e. decoding and | |
138 | encoding), we setup a structure of type `struct coding_system'. | |
139 | This structure keeps various information about a specific code | |
5bad0796 | 140 | conversion (e.g. the location of source and destination data). |
4ed46869 KH |
141 | |
142 | */ | |
143 | ||
df7492f9 KH |
144 | /* COMMON MACROS */ |
145 | ||
146 | ||
4ed46869 KH |
147 | /*** GENERAL NOTES on `detect_coding_XXX ()' functions *** |
148 | ||
df7492f9 | 149 | These functions check if a byte sequence specified as a source in |
ff0dacd7 KH |
150 | CODING conforms to the format of XXX, and update the members of |
151 | DETECT_INFO. | |
df7492f9 | 152 | |
ff0dacd7 | 153 | Return 1 if the byte sequence conforms to XXX, otherwise return 0. |
df7492f9 KH |
154 | |
155 | Below is the template of these functions. */ | |
156 | ||
4ed46869 | 157 | #if 0 |
df7492f9 | 158 | static int |
ff0dacd7 | 159 | detect_coding_XXX (coding, detect_info) |
df7492f9 | 160 | struct coding_system *coding; |
ff0dacd7 | 161 | struct coding_detection_info *detect_info; |
4ed46869 | 162 | { |
f1d34bca MB |
163 | const unsigned char *src = coding->source; |
164 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
df7492f9 | 165 | int multibytep = coding->src_multibyte; |
ff0dacd7 | 166 | int consumed_chars = 0; |
df7492f9 KH |
167 | int found = 0; |
168 | ...; | |
169 | ||
170 | while (1) | |
171 | { | |
172 | /* Get one byte from the source. If the souce is exausted, jump | |
173 | to no_more_source:. */ | |
174 | ONE_MORE_BYTE (c); | |
ff0dacd7 KH |
175 | |
176 | if (! __C_conforms_to_XXX___ (c)) | |
177 | break; | |
178 | if (! __C_strongly_suggests_XXX__ (c)) | |
179 | found = CATEGORY_MASK_XXX; | |
df7492f9 | 180 | } |
ff0dacd7 KH |
181 | /* The byte sequence is invalid for XXX. */ |
182 | detect_info->rejected |= CATEGORY_MASK_XXX; | |
df7492f9 | 183 | return 0; |
ff0dacd7 | 184 | |
df7492f9 | 185 | no_more_source: |
ff0dacd7 KH |
186 | /* The source exausted successfully. */ |
187 | detect_info->found |= found; | |
df7492f9 | 188 | return 1; |
4ed46869 KH |
189 | } |
190 | #endif | |
191 | ||
192 | /*** GENERAL NOTES on `decode_coding_XXX ()' functions *** | |
193 | ||
df7492f9 KH |
194 | These functions decode a byte sequence specified as a source by |
195 | CODING. The resulting multibyte text goes to a place pointed to by | |
196 | CODING->charbuf, the length of which should not exceed | |
197 | CODING->charbuf_size; | |
d46c5b12 | 198 | |
df7492f9 KH |
199 | These functions set the information of original and decoded texts in |
200 | CODING->consumed, CODING->consumed_char, and CODING->charbuf_used. | |
201 | They also set CODING->result to one of CODING_RESULT_XXX indicating | |
202 | how the decoding is finished. | |
d46c5b12 | 203 | |
df7492f9 | 204 | Below is the template of these functions. */ |
d46c5b12 | 205 | |
4ed46869 | 206 | #if 0 |
b73bfc1c | 207 | static void |
df7492f9 | 208 | decode_coding_XXXX (coding) |
4ed46869 | 209 | struct coding_system *coding; |
4ed46869 | 210 | { |
f1d34bca MB |
211 | const unsigned char *src = coding->source + coding->consumed; |
212 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
df7492f9 KH |
213 | /* SRC_BASE remembers the start position in source in each loop. |
214 | The loop will be exited when there's not enough source code, or | |
215 | when there's no room in CHARBUF for a decoded character. */ | |
f1d34bca | 216 | const unsigned char *src_base; |
df7492f9 | 217 | /* A buffer to produce decoded characters. */ |
69a80ea3 KH |
218 | int *charbuf = coding->charbuf + coding->charbuf_used; |
219 | int *charbuf_end = coding->charbuf + coding->charbuf_size; | |
df7492f9 KH |
220 | int multibytep = coding->src_multibyte; |
221 | ||
222 | while (1) | |
223 | { | |
224 | src_base = src; | |
225 | if (charbuf < charbuf_end) | |
226 | /* No more room to produce a decoded character. */ | |
227 | break; | |
228 | ONE_MORE_BYTE (c); | |
229 | /* Decode it. */ | |
230 | } | |
231 | ||
232 | no_more_source: | |
233 | if (src_base < src_end | |
234 | && coding->mode & CODING_MODE_LAST_BLOCK) | |
235 | /* If the source ends by partial bytes to construct a character, | |
236 | treat them as eight-bit raw data. */ | |
237 | while (src_base < src_end && charbuf < charbuf_end) | |
238 | *charbuf++ = *src_base++; | |
239 | /* Remember how many bytes and characters we consumed. If the | |
240 | source is multibyte, the bytes and chars are not identical. */ | |
241 | coding->consumed = coding->consumed_char = src_base - coding->source; | |
242 | /* Remember how many characters we produced. */ | |
243 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
244 | } |
245 | #endif | |
246 | ||
247 | /*** GENERAL NOTES on `encode_coding_XXX ()' functions *** | |
248 | ||
df7492f9 KH |
249 | These functions encode SRC_BYTES length text at SOURCE of Emacs' |
250 | internal multibyte format by CODING. The resulting byte sequence | |
b73bfc1c KH |
251 | goes to a place pointed to by DESTINATION, the length of which |
252 | should not exceed DST_BYTES. | |
d46c5b12 | 253 | |
df7492f9 KH |
254 | These functions set the information of original and encoded texts in |
255 | the members produced, produced_char, consumed, and consumed_char of | |
256 | the structure *CODING. They also set the member result to one of | |
257 | CODING_RESULT_XXX indicating how the encoding finished. | |
d46c5b12 | 258 | |
df7492f9 KH |
259 | DST_BYTES zero means that source area and destination area are |
260 | overlapped, which means that we can produce a encoded text until it | |
261 | reaches at the head of not-yet-encoded source text. | |
d46c5b12 | 262 | |
df7492f9 | 263 | Below is a template of these functions. */ |
4ed46869 | 264 | #if 0 |
b73bfc1c | 265 | static void |
df7492f9 | 266 | encode_coding_XXX (coding) |
4ed46869 | 267 | struct coding_system *coding; |
4ed46869 | 268 | { |
df7492f9 KH |
269 | int multibytep = coding->dst_multibyte; |
270 | int *charbuf = coding->charbuf; | |
271 | int *charbuf_end = charbuf->charbuf + coding->charbuf_used; | |
272 | unsigned char *dst = coding->destination + coding->produced; | |
273 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
274 | unsigned char *adjusted_dst_end = dst_end - _MAX_BYTES_PRODUCED_IN_LOOP_; | |
275 | int produced_chars = 0; | |
276 | ||
277 | for (; charbuf < charbuf_end && dst < adjusted_dst_end; charbuf++) | |
278 | { | |
279 | int c = *charbuf; | |
280 | /* Encode C into DST, and increment DST. */ | |
281 | } | |
282 | label_no_more_destination: | |
283 | /* How many chars and bytes we produced. */ | |
284 | coding->produced_char += produced_chars; | |
285 | coding->produced = dst - coding->destination; | |
4ed46869 KH |
286 | } |
287 | #endif | |
288 | ||
4ed46869 KH |
289 | \f |
290 | /*** 1. Preamble ***/ | |
291 | ||
68c45bf0 | 292 | #include <config.h> |
4ed46869 KH |
293 | #include <stdio.h> |
294 | ||
4ed46869 KH |
295 | #include "lisp.h" |
296 | #include "buffer.h" | |
df7492f9 | 297 | #include "character.h" |
4ed46869 KH |
298 | #include "charset.h" |
299 | #include "ccl.h" | |
df7492f9 | 300 | #include "composite.h" |
4ed46869 KH |
301 | #include "coding.h" |
302 | #include "window.h" | |
b8299c66 KL |
303 | #include "frame.h" |
304 | #include "termhooks.h" | |
4ed46869 | 305 | |
df7492f9 | 306 | Lisp_Object Vcoding_system_hash_table; |
4ed46869 | 307 | |
df7492f9 | 308 | Lisp_Object Qcoding_system, Qcoding_aliases, Qeol_type; |
1965cb73 DL |
309 | Lisp_Object Qunix, Qdos; |
310 | extern Lisp_Object Qmac; /* frame.c */ | |
4ed46869 KH |
311 | Lisp_Object Qbuffer_file_coding_system; |
312 | Lisp_Object Qpost_read_conversion, Qpre_write_conversion; | |
df7492f9 | 313 | Lisp_Object Qdefault_char; |
27901516 | 314 | Lisp_Object Qno_conversion, Qundecided; |
df7492f9 | 315 | Lisp_Object Qcharset, Qiso_2022, Qutf_8, Qutf_16, Qshift_jis, Qbig5; |
b49a1807 | 316 | Lisp_Object Qbig, Qlittle; |
bb0115a2 | 317 | Lisp_Object Qcoding_system_history; |
1397dc18 | 318 | Lisp_Object Qvalid_codes; |
a6f87d34 KH |
319 | Lisp_Object QCcategory, QCmnemonic, QCdefalut_char; |
320 | Lisp_Object QCdecode_translation_table, QCencode_translation_table; | |
321 | Lisp_Object QCpost_read_conversion, QCpre_write_conversion; | |
35befdaa | 322 | Lisp_Object QCascii_compatible_p; |
4ed46869 KH |
323 | |
324 | extern Lisp_Object Qinsert_file_contents, Qwrite_region; | |
387f6ba5 | 325 | Lisp_Object Qcall_process, Qcall_process_region; |
4ed46869 KH |
326 | Lisp_Object Qstart_process, Qopen_network_stream; |
327 | Lisp_Object Qtarget_idx; | |
328 | ||
065e3595 KH |
329 | Lisp_Object Qinsufficient_source, Qinconsistent_eol, Qinvalid_source; |
330 | Lisp_Object Qinterrupted, Qinsufficient_memory; | |
331 | ||
c7183fb8 GM |
332 | extern Lisp_Object Qcompletion_ignore_case; |
333 | ||
44e8490d KH |
334 | /* If a symbol has this property, evaluate the value to define the |
335 | symbol as a coding system. */ | |
336 | static Lisp_Object Qcoding_system_define_form; | |
337 | ||
5d5bf4d8 KH |
338 | int coding_system_require_warning; |
339 | ||
d46c5b12 KH |
340 | Lisp_Object Vselect_safe_coding_system_function; |
341 | ||
7722baf9 EZ |
342 | /* Mnemonic string for each format of end-of-line. */ |
343 | Lisp_Object eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac; | |
344 | /* Mnemonic string to indicate format of end-of-line is not yet | |
4ed46869 | 345 | decided. */ |
7722baf9 | 346 | Lisp_Object eol_mnemonic_undecided; |
4ed46869 | 347 | |
fcbcfb64 KH |
348 | /* Format of end-of-line decided by system. This is Qunix on |
349 | Unix and Mac, Qdos on DOS/Windows. | |
350 | This has an effect only for external encoding (i.e. for output to | |
351 | file and process), not for in-buffer or Lisp string encoding. */ | |
352 | static Lisp_Object system_eol_type; | |
353 | ||
4ed46869 KH |
354 | #ifdef emacs |
355 | ||
4608c386 KH |
356 | Lisp_Object Vcoding_system_list, Vcoding_system_alist; |
357 | ||
358 | Lisp_Object Qcoding_system_p, Qcoding_system_error; | |
4ed46869 | 359 | |
d46c5b12 KH |
360 | /* Coding system emacs-mule and raw-text are for converting only |
361 | end-of-line format. */ | |
362 | Lisp_Object Qemacs_mule, Qraw_text; | |
8f924df7 | 363 | Lisp_Object Qutf_8_emacs; |
ecf488bc | 364 | |
4ed46869 KH |
365 | /* Coding-systems are handed between Emacs Lisp programs and C internal |
366 | routines by the following three variables. */ | |
367 | /* Coding-system for reading files and receiving data from process. */ | |
368 | Lisp_Object Vcoding_system_for_read; | |
369 | /* Coding-system for writing files and sending data to process. */ | |
370 | Lisp_Object Vcoding_system_for_write; | |
371 | /* Coding-system actually used in the latest I/O. */ | |
372 | Lisp_Object Vlast_coding_system_used; | |
065e3595 KH |
373 | /* Set to non-nil when an error is detected while code conversion. */ |
374 | Lisp_Object Vlast_code_conversion_error; | |
c4825358 | 375 | /* A vector of length 256 which contains information about special |
94487c4e | 376 | Latin codes (especially for dealing with Microsoft codes). */ |
3f003981 | 377 | Lisp_Object Vlatin_extra_code_table; |
c4825358 | 378 | |
9ce27fde KH |
379 | /* Flag to inhibit code conversion of end-of-line format. */ |
380 | int inhibit_eol_conversion; | |
381 | ||
74383408 KH |
382 | /* Flag to inhibit ISO2022 escape sequence detection. */ |
383 | int inhibit_iso_escape_detection; | |
384 | ||
ed29121d EZ |
385 | /* Flag to make buffer-file-coding-system inherit from process-coding. */ |
386 | int inherit_process_coding_system; | |
387 | ||
c4825358 KH |
388 | /* Coding system to be used to encode text for terminal display when |
389 | terminal coding system is nil. */ | |
390 | struct coding_system safe_terminal_coding; | |
391 | ||
02ba4723 KH |
392 | Lisp_Object Vfile_coding_system_alist; |
393 | Lisp_Object Vprocess_coding_system_alist; | |
394 | Lisp_Object Vnetwork_coding_system_alist; | |
4ed46869 | 395 | |
68c45bf0 PE |
396 | Lisp_Object Vlocale_coding_system; |
397 | ||
4ed46869 KH |
398 | #endif /* emacs */ |
399 | ||
f967223b KH |
400 | /* Flag to tell if we look up translation table on character code |
401 | conversion. */ | |
84fbb8a0 | 402 | Lisp_Object Venable_character_translation; |
f967223b KH |
403 | /* Standard translation table to look up on decoding (reading). */ |
404 | Lisp_Object Vstandard_translation_table_for_decode; | |
405 | /* Standard translation table to look up on encoding (writing). */ | |
406 | Lisp_Object Vstandard_translation_table_for_encode; | |
84fbb8a0 | 407 | |
f967223b KH |
408 | Lisp_Object Qtranslation_table; |
409 | Lisp_Object Qtranslation_table_id; | |
410 | Lisp_Object Qtranslation_table_for_decode; | |
411 | Lisp_Object Qtranslation_table_for_encode; | |
4ed46869 KH |
412 | |
413 | /* Alist of charsets vs revision number. */ | |
df7492f9 | 414 | static Lisp_Object Vcharset_revision_table; |
4ed46869 | 415 | |
02ba4723 KH |
416 | /* Default coding systems used for process I/O. */ |
417 | Lisp_Object Vdefault_process_coding_system; | |
418 | ||
002fdb44 DL |
419 | /* Char table for translating Quail and self-inserting input. */ |
420 | Lisp_Object Vtranslation_table_for_input; | |
421 | ||
df7492f9 KH |
422 | /* Two special coding systems. */ |
423 | Lisp_Object Vsjis_coding_system; | |
424 | Lisp_Object Vbig5_coding_system; | |
425 | ||
df7492f9 KH |
426 | /* ISO2022 section */ |
427 | ||
428 | #define CODING_ISO_INITIAL(coding, reg) \ | |
429 | (XINT (AREF (AREF (CODING_ID_ATTRS ((coding)->id), \ | |
430 | coding_attr_iso_initial), \ | |
431 | reg))) | |
432 | ||
433 | ||
434 | #define CODING_ISO_REQUEST(coding, charset_id) \ | |
435 | ((charset_id <= (coding)->max_charset_id \ | |
436 | ? (coding)->safe_charsets[charset_id] \ | |
437 | : -1)) | |
438 | ||
439 | ||
440 | #define CODING_ISO_FLAGS(coding) \ | |
441 | ((coding)->spec.iso_2022.flags) | |
442 | #define CODING_ISO_DESIGNATION(coding, reg) \ | |
443 | ((coding)->spec.iso_2022.current_designation[reg]) | |
444 | #define CODING_ISO_INVOCATION(coding, plane) \ | |
445 | ((coding)->spec.iso_2022.current_invocation[plane]) | |
446 | #define CODING_ISO_SINGLE_SHIFTING(coding) \ | |
447 | ((coding)->spec.iso_2022.single_shifting) | |
448 | #define CODING_ISO_BOL(coding) \ | |
449 | ((coding)->spec.iso_2022.bol) | |
450 | #define CODING_ISO_INVOKED_CHARSET(coding, plane) \ | |
451 | CODING_ISO_DESIGNATION ((coding), CODING_ISO_INVOCATION ((coding), (plane))) | |
452 | ||
453 | /* Control characters of ISO2022. */ | |
454 | /* code */ /* function */ | |
455 | #define ISO_CODE_LF 0x0A /* line-feed */ | |
456 | #define ISO_CODE_CR 0x0D /* carriage-return */ | |
457 | #define ISO_CODE_SO 0x0E /* shift-out */ | |
458 | #define ISO_CODE_SI 0x0F /* shift-in */ | |
459 | #define ISO_CODE_SS2_7 0x19 /* single-shift-2 for 7-bit code */ | |
460 | #define ISO_CODE_ESC 0x1B /* escape */ | |
461 | #define ISO_CODE_SS2 0x8E /* single-shift-2 */ | |
462 | #define ISO_CODE_SS3 0x8F /* single-shift-3 */ | |
463 | #define ISO_CODE_CSI 0x9B /* control-sequence-introducer */ | |
464 | ||
465 | /* All code (1-byte) of ISO2022 is classified into one of the | |
466 | followings. */ | |
467 | enum iso_code_class_type | |
468 | { | |
469 | ISO_control_0, /* Control codes in the range | |
470 | 0x00..0x1F and 0x7F, except for the | |
471 | following 5 codes. */ | |
df7492f9 KH |
472 | ISO_shift_out, /* ISO_CODE_SO (0x0E) */ |
473 | ISO_shift_in, /* ISO_CODE_SI (0x0F) */ | |
474 | ISO_single_shift_2_7, /* ISO_CODE_SS2_7 (0x19) */ | |
475 | ISO_escape, /* ISO_CODE_SO (0x1B) */ | |
476 | ISO_control_1, /* Control codes in the range | |
477 | 0x80..0x9F, except for the | |
478 | following 3 codes. */ | |
479 | ISO_single_shift_2, /* ISO_CODE_SS2 (0x8E) */ | |
480 | ISO_single_shift_3, /* ISO_CODE_SS3 (0x8F) */ | |
481 | ISO_control_sequence_introducer, /* ISO_CODE_CSI (0x9B) */ | |
482 | ISO_0x20_or_0x7F, /* Codes of the values 0x20 or 0x7F. */ | |
483 | ISO_graphic_plane_0, /* Graphic codes in the range 0x21..0x7E. */ | |
484 | ISO_0xA0_or_0xFF, /* Codes of the values 0xA0 or 0xFF. */ | |
485 | ISO_graphic_plane_1 /* Graphic codes in the range 0xA1..0xFE. */ | |
486 | }; | |
05e6f5dc | 487 | |
df7492f9 KH |
488 | /** The macros CODING_ISO_FLAG_XXX defines a flag bit of the |
489 | `iso-flags' attribute of an iso2022 coding system. */ | |
05e6f5dc | 490 | |
df7492f9 KH |
491 | /* If set, produce long-form designation sequence (e.g. ESC $ ( A) |
492 | instead of the correct short-form sequence (e.g. ESC $ A). */ | |
493 | #define CODING_ISO_FLAG_LONG_FORM 0x0001 | |
93dec019 | 494 | |
df7492f9 KH |
495 | /* If set, reset graphic planes and registers at end-of-line to the |
496 | initial state. */ | |
497 | #define CODING_ISO_FLAG_RESET_AT_EOL 0x0002 | |
05e6f5dc | 498 | |
df7492f9 KH |
499 | /* If set, reset graphic planes and registers before any control |
500 | characters to the initial state. */ | |
501 | #define CODING_ISO_FLAG_RESET_AT_CNTL 0x0004 | |
05e6f5dc | 502 | |
df7492f9 KH |
503 | /* If set, encode by 7-bit environment. */ |
504 | #define CODING_ISO_FLAG_SEVEN_BITS 0x0008 | |
4ed46869 | 505 | |
df7492f9 KH |
506 | /* If set, use locking-shift function. */ |
507 | #define CODING_ISO_FLAG_LOCKING_SHIFT 0x0010 | |
b73bfc1c | 508 | |
df7492f9 KH |
509 | /* If set, use single-shift function. Overwrite |
510 | CODING_ISO_FLAG_LOCKING_SHIFT. */ | |
511 | #define CODING_ISO_FLAG_SINGLE_SHIFT 0x0020 | |
b73bfc1c | 512 | |
df7492f9 KH |
513 | /* If set, use designation escape sequence. */ |
514 | #define CODING_ISO_FLAG_DESIGNATION 0x0040 | |
b73bfc1c | 515 | |
df7492f9 KH |
516 | /* If set, produce revision number sequence. */ |
517 | #define CODING_ISO_FLAG_REVISION 0x0080 | |
b73bfc1c | 518 | |
df7492f9 KH |
519 | /* If set, produce ISO6429's direction specifying sequence. */ |
520 | #define CODING_ISO_FLAG_DIRECTION 0x0100 | |
f4dee582 | 521 | |
df7492f9 KH |
522 | /* If set, assume designation states are reset at beginning of line on |
523 | output. */ | |
524 | #define CODING_ISO_FLAG_INIT_AT_BOL 0x0200 | |
4ed46869 | 525 | |
df7492f9 KH |
526 | /* If set, designation sequence should be placed at beginning of line |
527 | on output. */ | |
528 | #define CODING_ISO_FLAG_DESIGNATE_AT_BOL 0x0400 | |
aa72b389 | 529 | |
df7492f9 KH |
530 | /* If set, do not encode unsafe charactes on output. */ |
531 | #define CODING_ISO_FLAG_SAFE 0x0800 | |
aa72b389 | 532 | |
df7492f9 KH |
533 | /* If set, extra latin codes (128..159) are accepted as a valid code |
534 | on input. */ | |
535 | #define CODING_ISO_FLAG_LATIN_EXTRA 0x1000 | |
aa72b389 | 536 | |
df7492f9 | 537 | #define CODING_ISO_FLAG_COMPOSITION 0x2000 |
aa72b389 | 538 | |
df7492f9 | 539 | #define CODING_ISO_FLAG_EUC_TW_SHIFT 0x4000 |
aa72b389 | 540 | |
bf16eb23 | 541 | #define CODING_ISO_FLAG_USE_ROMAN 0x8000 |
aa72b389 | 542 | |
bf16eb23 | 543 | #define CODING_ISO_FLAG_USE_OLDJIS 0x10000 |
aa72b389 | 544 | |
bf16eb23 | 545 | #define CODING_ISO_FLAG_FULL_SUPPORT 0x100000 |
aa72b389 | 546 | |
df7492f9 KH |
547 | /* A character to be produced on output if encoding of the original |
548 | character is prohibited by CODING_ISO_FLAG_SAFE. */ | |
549 | #define CODING_INHIBIT_CHARACTER_SUBSTITUTION '?' | |
aa72b389 | 550 | |
4ed46869 | 551 | |
df7492f9 KH |
552 | /* UTF-16 section */ |
553 | #define CODING_UTF_16_BOM(coding) \ | |
554 | ((coding)->spec.utf_16.bom) | |
4ed46869 | 555 | |
df7492f9 KH |
556 | #define CODING_UTF_16_ENDIAN(coding) \ |
557 | ((coding)->spec.utf_16.endian) | |
4ed46869 | 558 | |
df7492f9 KH |
559 | #define CODING_UTF_16_SURROGATE(coding) \ |
560 | ((coding)->spec.utf_16.surrogate) | |
4ed46869 | 561 | |
4ed46869 | 562 | |
df7492f9 KH |
563 | /* CCL section */ |
564 | #define CODING_CCL_DECODER(coding) \ | |
565 | AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_decoder) | |
566 | #define CODING_CCL_ENCODER(coding) \ | |
567 | AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_encoder) | |
568 | #define CODING_CCL_VALIDS(coding) \ | |
8f924df7 | 569 | (SDATA (AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_valids))) |
4ed46869 | 570 | |
5a936b46 | 571 | /* Index for each coding category in `coding_categories' */ |
4ed46869 | 572 | |
df7492f9 KH |
573 | enum coding_category |
574 | { | |
575 | coding_category_iso_7, | |
576 | coding_category_iso_7_tight, | |
577 | coding_category_iso_8_1, | |
578 | coding_category_iso_8_2, | |
579 | coding_category_iso_7_else, | |
580 | coding_category_iso_8_else, | |
581 | coding_category_utf_8, | |
582 | coding_category_utf_16_auto, | |
583 | coding_category_utf_16_be, | |
584 | coding_category_utf_16_le, | |
585 | coding_category_utf_16_be_nosig, | |
586 | coding_category_utf_16_le_nosig, | |
587 | coding_category_charset, | |
588 | coding_category_sjis, | |
589 | coding_category_big5, | |
590 | coding_category_ccl, | |
591 | coding_category_emacs_mule, | |
592 | /* All above are targets of code detection. */ | |
593 | coding_category_raw_text, | |
594 | coding_category_undecided, | |
595 | coding_category_max | |
596 | }; | |
597 | ||
598 | /* Definitions of flag bits used in detect_coding_XXXX. */ | |
599 | #define CATEGORY_MASK_ISO_7 (1 << coding_category_iso_7) | |
600 | #define CATEGORY_MASK_ISO_7_TIGHT (1 << coding_category_iso_7_tight) | |
601 | #define CATEGORY_MASK_ISO_8_1 (1 << coding_category_iso_8_1) | |
602 | #define CATEGORY_MASK_ISO_8_2 (1 << coding_category_iso_8_2) | |
603 | #define CATEGORY_MASK_ISO_7_ELSE (1 << coding_category_iso_7_else) | |
604 | #define CATEGORY_MASK_ISO_8_ELSE (1 << coding_category_iso_8_else) | |
605 | #define CATEGORY_MASK_UTF_8 (1 << coding_category_utf_8) | |
b49a1807 | 606 | #define CATEGORY_MASK_UTF_16_AUTO (1 << coding_category_utf_16_auto) |
df7492f9 KH |
607 | #define CATEGORY_MASK_UTF_16_BE (1 << coding_category_utf_16_be) |
608 | #define CATEGORY_MASK_UTF_16_LE (1 << coding_category_utf_16_le) | |
609 | #define CATEGORY_MASK_UTF_16_BE_NOSIG (1 << coding_category_utf_16_be_nosig) | |
610 | #define CATEGORY_MASK_UTF_16_LE_NOSIG (1 << coding_category_utf_16_le_nosig) | |
611 | #define CATEGORY_MASK_CHARSET (1 << coding_category_charset) | |
612 | #define CATEGORY_MASK_SJIS (1 << coding_category_sjis) | |
613 | #define CATEGORY_MASK_BIG5 (1 << coding_category_big5) | |
614 | #define CATEGORY_MASK_CCL (1 << coding_category_ccl) | |
615 | #define CATEGORY_MASK_EMACS_MULE (1 << coding_category_emacs_mule) | |
ff0dacd7 | 616 | #define CATEGORY_MASK_RAW_TEXT (1 << coding_category_raw_text) |
df7492f9 KH |
617 | |
618 | /* This value is returned if detect_coding_mask () find nothing other | |
619 | than ASCII characters. */ | |
620 | #define CATEGORY_MASK_ANY \ | |
621 | (CATEGORY_MASK_ISO_7 \ | |
622 | | CATEGORY_MASK_ISO_7_TIGHT \ | |
623 | | CATEGORY_MASK_ISO_8_1 \ | |
624 | | CATEGORY_MASK_ISO_8_2 \ | |
625 | | CATEGORY_MASK_ISO_7_ELSE \ | |
626 | | CATEGORY_MASK_ISO_8_ELSE \ | |
627 | | CATEGORY_MASK_UTF_8 \ | |
628 | | CATEGORY_MASK_UTF_16_BE \ | |
629 | | CATEGORY_MASK_UTF_16_LE \ | |
630 | | CATEGORY_MASK_UTF_16_BE_NOSIG \ | |
631 | | CATEGORY_MASK_UTF_16_LE_NOSIG \ | |
632 | | CATEGORY_MASK_CHARSET \ | |
633 | | CATEGORY_MASK_SJIS \ | |
634 | | CATEGORY_MASK_BIG5 \ | |
635 | | CATEGORY_MASK_CCL \ | |
636 | | CATEGORY_MASK_EMACS_MULE) | |
637 | ||
638 | ||
639 | #define CATEGORY_MASK_ISO_7BIT \ | |
640 | (CATEGORY_MASK_ISO_7 | CATEGORY_MASK_ISO_7_TIGHT) | |
641 | ||
642 | #define CATEGORY_MASK_ISO_8BIT \ | |
643 | (CATEGORY_MASK_ISO_8_1 | CATEGORY_MASK_ISO_8_2) | |
644 | ||
645 | #define CATEGORY_MASK_ISO_ELSE \ | |
646 | (CATEGORY_MASK_ISO_7_ELSE | CATEGORY_MASK_ISO_8_ELSE) | |
647 | ||
648 | #define CATEGORY_MASK_ISO_ESCAPE \ | |
649 | (CATEGORY_MASK_ISO_7 \ | |
650 | | CATEGORY_MASK_ISO_7_TIGHT \ | |
651 | | CATEGORY_MASK_ISO_7_ELSE \ | |
652 | | CATEGORY_MASK_ISO_8_ELSE) | |
653 | ||
654 | #define CATEGORY_MASK_ISO \ | |
655 | ( CATEGORY_MASK_ISO_7BIT \ | |
656 | | CATEGORY_MASK_ISO_8BIT \ | |
657 | | CATEGORY_MASK_ISO_ELSE) | |
658 | ||
659 | #define CATEGORY_MASK_UTF_16 \ | |
660 | (CATEGORY_MASK_UTF_16_BE \ | |
661 | | CATEGORY_MASK_UTF_16_LE \ | |
662 | | CATEGORY_MASK_UTF_16_BE_NOSIG \ | |
663 | | CATEGORY_MASK_UTF_16_LE_NOSIG) | |
664 | ||
665 | ||
666 | /* List of symbols `coding-category-xxx' ordered by priority. This | |
667 | variable is exposed to Emacs Lisp. */ | |
668 | static Lisp_Object Vcoding_category_list; | |
669 | ||
670 | /* Table of coding categories (Lisp symbols). This variable is for | |
671 | internal use oly. */ | |
672 | static Lisp_Object Vcoding_category_table; | |
673 | ||
674 | /* Table of coding-categories ordered by priority. */ | |
675 | static enum coding_category coding_priorities[coding_category_max]; | |
676 | ||
677 | /* Nth element is a coding context for the coding system bound to the | |
678 | Nth coding category. */ | |
679 | static struct coding_system coding_categories[coding_category_max]; | |
680 | ||
df7492f9 KH |
681 | /*** Commonly used macros and functions ***/ |
682 | ||
683 | #ifndef min | |
684 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
685 | #endif | |
686 | #ifndef max | |
687 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
688 | #endif | |
4ed46869 | 689 | |
24a73b0a KH |
690 | #define CODING_GET_INFO(coding, attrs, charset_list) \ |
691 | do { \ | |
692 | (attrs) = CODING_ID_ATTRS ((coding)->id); \ | |
693 | (charset_list) = CODING_ATTR_CHARSET_LIST (attrs); \ | |
df7492f9 | 694 | } while (0) |
4ed46869 | 695 | |
4ed46869 | 696 | |
df7492f9 KH |
697 | /* Safely get one byte from the source text pointed by SRC which ends |
698 | at SRC_END, and set C to that byte. If there are not enough bytes | |
065e3595 KH |
699 | in the source, it jumps to `no_more_source'. If multibytep is |
700 | nonzero, and a multibyte character is found at SRC, set C to the | |
701 | negative value of the character code. The caller should declare | |
702 | and set these variables appropriately in advance: | |
703 | src, src_end, multibytep */ | |
aa72b389 | 704 | |
065e3595 KH |
705 | #define ONE_MORE_BYTE(c) \ |
706 | do { \ | |
707 | if (src == src_end) \ | |
708 | { \ | |
709 | if (src_base < src) \ | |
710 | record_conversion_result \ | |
711 | (coding, CODING_RESULT_INSUFFICIENT_SRC); \ | |
712 | goto no_more_source; \ | |
713 | } \ | |
714 | c = *src++; \ | |
715 | if (multibytep && (c & 0x80)) \ | |
716 | { \ | |
717 | if ((c & 0xFE) == 0xC0) \ | |
718 | c = ((c & 1) << 6) | *src++; \ | |
719 | else \ | |
720 | { \ | |
35befdaa KH |
721 | src--; \ |
722 | c = - string_char (src, &src, NULL); \ | |
065e3595 KH |
723 | record_conversion_result \ |
724 | (coding, CODING_RESULT_INVALID_SRC); \ | |
725 | } \ | |
726 | } \ | |
727 | consumed_chars++; \ | |
aa72b389 KH |
728 | } while (0) |
729 | ||
aa72b389 | 730 | |
065e3595 KH |
731 | #define ONE_MORE_BYTE_NO_CHECK(c) \ |
732 | do { \ | |
733 | c = *src++; \ | |
734 | if (multibytep && (c & 0x80)) \ | |
735 | { \ | |
736 | if ((c & 0xFE) == 0xC0) \ | |
737 | c = ((c & 1) << 6) | *src++; \ | |
738 | else \ | |
739 | { \ | |
35befdaa KH |
740 | src--; \ |
741 | c = - string_char (src, &src, NULL); \ | |
065e3595 KH |
742 | record_conversion_result \ |
743 | (coding, CODING_RESULT_INVALID_SRC); \ | |
744 | } \ | |
745 | } \ | |
746 | consumed_chars++; \ | |
aa72b389 KH |
747 | } while (0) |
748 | ||
aa72b389 | 749 | |
df7492f9 KH |
750 | /* Store a byte C in the place pointed by DST and increment DST to the |
751 | next free point, and increment PRODUCED_CHARS. The caller should | |
752 | assure that C is 0..127, and declare and set the variable `dst' | |
753 | appropriately in advance. | |
754 | */ | |
aa72b389 KH |
755 | |
756 | ||
df7492f9 KH |
757 | #define EMIT_ONE_ASCII_BYTE(c) \ |
758 | do { \ | |
759 | produced_chars++; \ | |
760 | *dst++ = (c); \ | |
b6871cc7 | 761 | } while (0) |
aa72b389 KH |
762 | |
763 | ||
df7492f9 | 764 | /* Like EMIT_ONE_ASCII_BYTE byt store two bytes; C1 and C2. */ |
aa72b389 | 765 | |
df7492f9 KH |
766 | #define EMIT_TWO_ASCII_BYTES(c1, c2) \ |
767 | do { \ | |
768 | produced_chars += 2; \ | |
769 | *dst++ = (c1), *dst++ = (c2); \ | |
770 | } while (0) | |
aa72b389 KH |
771 | |
772 | ||
df7492f9 KH |
773 | /* Store a byte C in the place pointed by DST and increment DST to the |
774 | next free point, and increment PRODUCED_CHARS. If MULTIBYTEP is | |
775 | nonzero, store in an appropriate multibyte from. The caller should | |
776 | declare and set the variables `dst' and `multibytep' appropriately | |
777 | in advance. */ | |
778 | ||
779 | #define EMIT_ONE_BYTE(c) \ | |
780 | do { \ | |
781 | produced_chars++; \ | |
782 | if (multibytep) \ | |
783 | { \ | |
784 | int ch = (c); \ | |
785 | if (ch >= 0x80) \ | |
786 | ch = BYTE8_TO_CHAR (ch); \ | |
787 | CHAR_STRING_ADVANCE (ch, dst); \ | |
788 | } \ | |
789 | else \ | |
790 | *dst++ = (c); \ | |
aa72b389 | 791 | } while (0) |
aa72b389 | 792 | |
aa72b389 | 793 | |
df7492f9 | 794 | /* Like EMIT_ONE_BYTE, but emit two bytes; C1 and C2. */ |
aa72b389 | 795 | |
e19c3639 KH |
796 | #define EMIT_TWO_BYTES(c1, c2) \ |
797 | do { \ | |
798 | produced_chars += 2; \ | |
799 | if (multibytep) \ | |
800 | { \ | |
801 | int ch; \ | |
802 | \ | |
803 | ch = (c1); \ | |
804 | if (ch >= 0x80) \ | |
805 | ch = BYTE8_TO_CHAR (ch); \ | |
806 | CHAR_STRING_ADVANCE (ch, dst); \ | |
807 | ch = (c2); \ | |
808 | if (ch >= 0x80) \ | |
809 | ch = BYTE8_TO_CHAR (ch); \ | |
810 | CHAR_STRING_ADVANCE (ch, dst); \ | |
811 | } \ | |
812 | else \ | |
813 | { \ | |
814 | *dst++ = (c1); \ | |
815 | *dst++ = (c2); \ | |
816 | } \ | |
aa72b389 KH |
817 | } while (0) |
818 | ||
819 | ||
df7492f9 KH |
820 | #define EMIT_THREE_BYTES(c1, c2, c3) \ |
821 | do { \ | |
822 | EMIT_ONE_BYTE (c1); \ | |
823 | EMIT_TWO_BYTES (c2, c3); \ | |
824 | } while (0) | |
aa72b389 | 825 | |
aa72b389 | 826 | |
df7492f9 KH |
827 | #define EMIT_FOUR_BYTES(c1, c2, c3, c4) \ |
828 | do { \ | |
829 | EMIT_TWO_BYTES (c1, c2); \ | |
830 | EMIT_TWO_BYTES (c3, c4); \ | |
831 | } while (0) | |
aa72b389 | 832 | |
aa72b389 | 833 | |
f6cbaf43 KH |
834 | /* Prototypes for static functions. */ |
835 | static void record_conversion_result P_ ((struct coding_system *coding, | |
836 | enum coding_result_code result)); | |
837 | static int detect_coding_utf_8 P_ ((struct coding_system *, | |
838 | struct coding_detection_info *info)); | |
839 | static void decode_coding_utf_8 P_ ((struct coding_system *)); | |
840 | static int encode_coding_utf_8 P_ ((struct coding_system *)); | |
841 | ||
842 | static int detect_coding_utf_16 P_ ((struct coding_system *, | |
843 | struct coding_detection_info *info)); | |
844 | static void decode_coding_utf_16 P_ ((struct coding_system *)); | |
845 | static int encode_coding_utf_16 P_ ((struct coding_system *)); | |
846 | ||
847 | static int detect_coding_iso_2022 P_ ((struct coding_system *, | |
848 | struct coding_detection_info *info)); | |
849 | static void decode_coding_iso_2022 P_ ((struct coding_system *)); | |
850 | static int encode_coding_iso_2022 P_ ((struct coding_system *)); | |
851 | ||
852 | static int detect_coding_emacs_mule P_ ((struct coding_system *, | |
853 | struct coding_detection_info *info)); | |
854 | static void decode_coding_emacs_mule P_ ((struct coding_system *)); | |
855 | static int encode_coding_emacs_mule P_ ((struct coding_system *)); | |
856 | ||
857 | static int detect_coding_sjis P_ ((struct coding_system *, | |
858 | struct coding_detection_info *info)); | |
859 | static void decode_coding_sjis P_ ((struct coding_system *)); | |
860 | static int encode_coding_sjis P_ ((struct coding_system *)); | |
861 | ||
862 | static int detect_coding_big5 P_ ((struct coding_system *, | |
863 | struct coding_detection_info *info)); | |
864 | static void decode_coding_big5 P_ ((struct coding_system *)); | |
865 | static int encode_coding_big5 P_ ((struct coding_system *)); | |
866 | ||
867 | static int detect_coding_ccl P_ ((struct coding_system *, | |
868 | struct coding_detection_info *info)); | |
869 | static void decode_coding_ccl P_ ((struct coding_system *)); | |
870 | static int encode_coding_ccl P_ ((struct coding_system *)); | |
871 | ||
872 | static void decode_coding_raw_text P_ ((struct coding_system *)); | |
873 | static int encode_coding_raw_text P_ ((struct coding_system *)); | |
874 | ||
875 | static void coding_set_source P_ ((struct coding_system *)); | |
876 | static void coding_set_destination P_ ((struct coding_system *)); | |
877 | static void coding_alloc_by_realloc P_ ((struct coding_system *, EMACS_INT)); | |
878 | static void coding_alloc_by_making_gap P_ ((struct coding_system *, | |
287c57d7 | 879 | EMACS_INT, EMACS_INT)); |
f6cbaf43 KH |
880 | static unsigned char *alloc_destination P_ ((struct coding_system *, |
881 | EMACS_INT, unsigned char *)); | |
882 | static void setup_iso_safe_charsets P_ ((Lisp_Object)); | |
883 | static unsigned char *encode_designation_at_bol P_ ((struct coding_system *, | |
884 | int *, int *, | |
885 | unsigned char *)); | |
886 | static int detect_eol P_ ((const unsigned char *, | |
887 | EMACS_INT, enum coding_category)); | |
888 | static Lisp_Object adjust_coding_eol_type P_ ((struct coding_system *, int)); | |
889 | static void decode_eol P_ ((struct coding_system *)); | |
890 | static Lisp_Object get_translation_table P_ ((Lisp_Object, int, int *)); | |
891 | static Lisp_Object get_translation P_ ((Lisp_Object, int *, int *, | |
892 | int, int *, int *)); | |
893 | static int produce_chars P_ ((struct coding_system *, Lisp_Object, int)); | |
894 | static INLINE void produce_composition P_ ((struct coding_system *, int *, | |
895 | EMACS_INT)); | |
896 | static INLINE void produce_charset P_ ((struct coding_system *, int *, | |
897 | EMACS_INT)); | |
898 | static void produce_annotation P_ ((struct coding_system *, EMACS_INT)); | |
899 | static int decode_coding P_ ((struct coding_system *)); | |
900 | static INLINE int *handle_composition_annotation P_ ((EMACS_INT, EMACS_INT, | |
901 | struct coding_system *, | |
902 | int *, EMACS_INT *)); | |
903 | static INLINE int *handle_charset_annotation P_ ((EMACS_INT, EMACS_INT, | |
904 | struct coding_system *, | |
905 | int *, EMACS_INT *)); | |
906 | static void consume_chars P_ ((struct coding_system *, Lisp_Object, int)); | |
907 | static int encode_coding P_ ((struct coding_system *)); | |
908 | static Lisp_Object make_conversion_work_buffer P_ ((int)); | |
909 | static Lisp_Object code_conversion_restore P_ ((Lisp_Object)); | |
910 | static INLINE int char_encodable_p P_ ((int, Lisp_Object)); | |
911 | static Lisp_Object make_subsidiaries P_ ((Lisp_Object)); | |
912 | ||
065e3595 KH |
913 | static void |
914 | record_conversion_result (struct coding_system *coding, | |
915 | enum coding_result_code result) | |
916 | { | |
917 | coding->result = result; | |
918 | switch (result) | |
919 | { | |
920 | case CODING_RESULT_INSUFFICIENT_SRC: | |
921 | Vlast_code_conversion_error = Qinsufficient_source; | |
922 | break; | |
923 | case CODING_RESULT_INCONSISTENT_EOL: | |
924 | Vlast_code_conversion_error = Qinconsistent_eol; | |
925 | break; | |
926 | case CODING_RESULT_INVALID_SRC: | |
927 | Vlast_code_conversion_error = Qinvalid_source; | |
928 | break; | |
929 | case CODING_RESULT_INTERRUPT: | |
930 | Vlast_code_conversion_error = Qinterrupted; | |
931 | break; | |
932 | case CODING_RESULT_INSUFFICIENT_MEM: | |
933 | Vlast_code_conversion_error = Qinsufficient_memory; | |
934 | break; | |
35befdaa KH |
935 | default: |
936 | Vlast_code_conversion_error = intern ("Unknown error"); | |
065e3595 KH |
937 | } |
938 | } | |
939 | ||
df7492f9 KH |
940 | #define CODING_DECODE_CHAR(coding, src, src_base, src_end, charset, code, c) \ |
941 | do { \ | |
942 | charset_map_loaded = 0; \ | |
943 | c = DECODE_CHAR (charset, code); \ | |
944 | if (charset_map_loaded) \ | |
945 | { \ | |
8f924df7 | 946 | const unsigned char *orig = coding->source; \ |
df7492f9 KH |
947 | EMACS_INT offset; \ |
948 | \ | |
949 | coding_set_source (coding); \ | |
950 | offset = coding->source - orig; \ | |
951 | src += offset; \ | |
952 | src_base += offset; \ | |
953 | src_end += offset; \ | |
954 | } \ | |
aa72b389 KH |
955 | } while (0) |
956 | ||
957 | ||
df7492f9 KH |
958 | #define ASSURE_DESTINATION(bytes) \ |
959 | do { \ | |
960 | if (dst + (bytes) >= dst_end) \ | |
961 | { \ | |
962 | int more_bytes = charbuf_end - charbuf + (bytes); \ | |
963 | \ | |
964 | dst = alloc_destination (coding, more_bytes, dst); \ | |
965 | dst_end = coding->destination + coding->dst_bytes; \ | |
966 | } \ | |
967 | } while (0) | |
aa72b389 | 968 | |
aa72b389 | 969 | |
aa72b389 | 970 | |
df7492f9 KH |
971 | static void |
972 | coding_set_source (coding) | |
aa72b389 | 973 | struct coding_system *coding; |
aa72b389 | 974 | { |
df7492f9 KH |
975 | if (BUFFERP (coding->src_object)) |
976 | { | |
2cb26057 | 977 | struct buffer *buf = XBUFFER (coding->src_object); |
aa72b389 | 978 | |
df7492f9 | 979 | if (coding->src_pos < 0) |
2cb26057 | 980 | coding->source = BUF_GAP_END_ADDR (buf) + coding->src_pos_byte; |
df7492f9 | 981 | else |
2cb26057 | 982 | coding->source = BUF_BYTE_ADDRESS (buf, coding->src_pos_byte); |
aa72b389 | 983 | } |
df7492f9 | 984 | else if (STRINGP (coding->src_object)) |
aa72b389 | 985 | { |
8f924df7 | 986 | coding->source = SDATA (coding->src_object) + coding->src_pos_byte; |
aa72b389 | 987 | } |
df7492f9 KH |
988 | else |
989 | /* Otherwise, the source is C string and is never relocated | |
990 | automatically. Thus we don't have to update anything. */ | |
991 | ; | |
992 | } | |
aa72b389 | 993 | |
df7492f9 KH |
994 | static void |
995 | coding_set_destination (coding) | |
996 | struct coding_system *coding; | |
997 | { | |
998 | if (BUFFERP (coding->dst_object)) | |
aa72b389 | 999 | { |
df7492f9 | 1000 | if (coding->src_pos < 0) |
aa72b389 | 1001 | { |
13818c30 | 1002 | coding->destination = BEG_ADDR + coding->dst_pos_byte - BEG_BYTE; |
28f67a95 KH |
1003 | coding->dst_bytes = (GAP_END_ADDR |
1004 | - (coding->src_bytes - coding->consumed) | |
1005 | - coding->destination); | |
aa72b389 | 1006 | } |
df7492f9 | 1007 | else |
28f67a95 KH |
1008 | { |
1009 | /* We are sure that coding->dst_pos_byte is before the gap | |
1010 | of the buffer. */ | |
1011 | coding->destination = (BUF_BEG_ADDR (XBUFFER (coding->dst_object)) | |
13818c30 | 1012 | + coding->dst_pos_byte - BEG_BYTE); |
28f67a95 KH |
1013 | coding->dst_bytes = (BUF_GAP_END_ADDR (XBUFFER (coding->dst_object)) |
1014 | - coding->destination); | |
1015 | } | |
df7492f9 KH |
1016 | } |
1017 | else | |
1018 | /* Otherwise, the destination is C string and is never relocated | |
1019 | automatically. Thus we don't have to update anything. */ | |
1020 | ; | |
1021 | } | |
1022 | ||
1023 | ||
1024 | static void | |
1025 | coding_alloc_by_realloc (coding, bytes) | |
1026 | struct coding_system *coding; | |
1027 | EMACS_INT bytes; | |
1028 | { | |
1029 | coding->destination = (unsigned char *) xrealloc (coding->destination, | |
1030 | coding->dst_bytes + bytes); | |
1031 | coding->dst_bytes += bytes; | |
1032 | } | |
1033 | ||
1034 | static void | |
287c57d7 | 1035 | coding_alloc_by_making_gap (coding, offset, bytes) |
df7492f9 | 1036 | struct coding_system *coding; |
287c57d7 | 1037 | EMACS_INT offset, bytes; |
df7492f9 | 1038 | { |
2c78b7e1 KH |
1039 | if (BUFFERP (coding->dst_object) |
1040 | && EQ (coding->src_object, coding->dst_object)) | |
df7492f9 | 1041 | { |
287c57d7 | 1042 | EMACS_INT add = offset + (coding->src_bytes - coding->consumed); |
df7492f9 | 1043 | |
287c57d7 | 1044 | GPT += offset, GPT_BYTE += offset; |
df7492f9 KH |
1045 | GAP_SIZE -= add; ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; |
1046 | make_gap (bytes); | |
1047 | GAP_SIZE += add; ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
287c57d7 | 1048 | GPT -= offset, GPT_BYTE -= offset; |
df7492f9 | 1049 | } |
730fff51 | 1050 | else |
df7492f9 | 1051 | { |
2c78b7e1 KH |
1052 | Lisp_Object this_buffer; |
1053 | ||
1054 | this_buffer = Fcurrent_buffer (); | |
df7492f9 KH |
1055 | set_buffer_internal (XBUFFER (coding->dst_object)); |
1056 | make_gap (bytes); | |
1057 | set_buffer_internal (XBUFFER (this_buffer)); | |
aa72b389 | 1058 | } |
df7492f9 | 1059 | } |
8f924df7 | 1060 | |
df7492f9 KH |
1061 | |
1062 | static unsigned char * | |
1063 | alloc_destination (coding, nbytes, dst) | |
1064 | struct coding_system *coding; | |
3e139625 | 1065 | EMACS_INT nbytes; |
df7492f9 KH |
1066 | unsigned char *dst; |
1067 | { | |
1068 | EMACS_INT offset = dst - coding->destination; | |
1069 | ||
1070 | if (BUFFERP (coding->dst_object)) | |
287c57d7 | 1071 | coding_alloc_by_making_gap (coding, offset, nbytes); |
aa72b389 | 1072 | else |
df7492f9 | 1073 | coding_alloc_by_realloc (coding, nbytes); |
065e3595 | 1074 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
1075 | coding_set_destination (coding); |
1076 | dst = coding->destination + offset; | |
1077 | return dst; | |
1078 | } | |
aa72b389 | 1079 | |
ff0dacd7 KH |
1080 | /** Macros for annotations. */ |
1081 | ||
1082 | /* Maximum length of annotation data (sum of annotations for | |
1083 | composition and charset). */ | |
69a80ea3 | 1084 | #define MAX_ANNOTATION_LENGTH (4 + (MAX_COMPOSITION_COMPONENTS * 2) - 1 + 4) |
ff0dacd7 KH |
1085 | |
1086 | /* An annotation data is stored in the array coding->charbuf in this | |
1087 | format: | |
69a80ea3 | 1088 | [ -LENGTH ANNOTATION_MASK NCHARS ... ] |
ff0dacd7 KH |
1089 | LENGTH is the number of elements in the annotation. |
1090 | ANNOTATION_MASK is one of CODING_ANNOTATE_XXX_MASK. | |
69a80ea3 | 1091 | NCHARS is the number of characters in the text annotated. |
ff0dacd7 KH |
1092 | |
1093 | The format of the following elements depend on ANNOTATION_MASK. | |
1094 | ||
1095 | In the case of CODING_ANNOTATE_COMPOSITION_MASK, these elements | |
1096 | follows: | |
1097 | ... METHOD [ COMPOSITION-COMPONENTS ... ] | |
1098 | METHOD is one of enum composition_method. | |
1099 | Optionnal COMPOSITION-COMPONENTS are characters and composition | |
1100 | rules. | |
1101 | ||
1102 | In the case of CODING_ANNOTATE_CHARSET_MASK, one element CHARSET-ID | |
1103 | follows. */ | |
1104 | ||
69a80ea3 | 1105 | #define ADD_ANNOTATION_DATA(buf, len, mask, nchars) \ |
ff0dacd7 KH |
1106 | do { \ |
1107 | *(buf)++ = -(len); \ | |
1108 | *(buf)++ = (mask); \ | |
69a80ea3 | 1109 | *(buf)++ = (nchars); \ |
ff0dacd7 KH |
1110 | coding->annotated = 1; \ |
1111 | } while (0); | |
1112 | ||
69a80ea3 KH |
1113 | #define ADD_COMPOSITION_DATA(buf, nchars, method) \ |
1114 | do { \ | |
1115 | ADD_ANNOTATION_DATA (buf, 4, CODING_ANNOTATE_COMPOSITION_MASK, nchars); \ | |
1116 | *buf++ = method; \ | |
ff0dacd7 KH |
1117 | } while (0) |
1118 | ||
1119 | ||
69a80ea3 KH |
1120 | #define ADD_CHARSET_DATA(buf, nchars, id) \ |
1121 | do { \ | |
1122 | ADD_ANNOTATION_DATA (buf, 4, CODING_ANNOTATE_CHARSET_MASK, nchars); \ | |
1123 | *buf++ = id; \ | |
ff0dacd7 KH |
1124 | } while (0) |
1125 | ||
df7492f9 KH |
1126 | \f |
1127 | /*** 2. Emacs' internal format (emacs-utf-8) ***/ | |
1128 | ||
1129 | ||
1130 | ||
1131 | \f | |
1132 | /*** 3. UTF-8 ***/ | |
1133 | ||
1134 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
ff0dacd7 KH |
1135 | Check if a text is encoded in UTF-8. If it is, return 1, else |
1136 | return 0. */ | |
df7492f9 KH |
1137 | |
1138 | #define UTF_8_1_OCTET_P(c) ((c) < 0x80) | |
1139 | #define UTF_8_EXTRA_OCTET_P(c) (((c) & 0xC0) == 0x80) | |
1140 | #define UTF_8_2_OCTET_LEADING_P(c) (((c) & 0xE0) == 0xC0) | |
1141 | #define UTF_8_3_OCTET_LEADING_P(c) (((c) & 0xF0) == 0xE0) | |
1142 | #define UTF_8_4_OCTET_LEADING_P(c) (((c) & 0xF8) == 0xF0) | |
1143 | #define UTF_8_5_OCTET_LEADING_P(c) (((c) & 0xFC) == 0xF8) | |
1144 | ||
1145 | static int | |
ff0dacd7 | 1146 | detect_coding_utf_8 (coding, detect_info) |
df7492f9 | 1147 | struct coding_system *coding; |
ff0dacd7 | 1148 | struct coding_detection_info *detect_info; |
df7492f9 | 1149 | { |
065e3595 | 1150 | const unsigned char *src = coding->source, *src_base; |
8f924df7 | 1151 | const unsigned char *src_end = coding->source + coding->src_bytes; |
df7492f9 KH |
1152 | int multibytep = coding->src_multibyte; |
1153 | int consumed_chars = 0; | |
1154 | int found = 0; | |
1155 | ||
ff0dacd7 | 1156 | detect_info->checked |= CATEGORY_MASK_UTF_8; |
df7492f9 KH |
1157 | /* A coding system of this category is always ASCII compatible. */ |
1158 | src += coding->head_ascii; | |
1159 | ||
1160 | while (1) | |
aa72b389 | 1161 | { |
df7492f9 | 1162 | int c, c1, c2, c3, c4; |
aa72b389 | 1163 | |
065e3595 | 1164 | src_base = src; |
df7492f9 | 1165 | ONE_MORE_BYTE (c); |
065e3595 | 1166 | if (c < 0 || UTF_8_1_OCTET_P (c)) |
df7492f9 KH |
1167 | continue; |
1168 | ONE_MORE_BYTE (c1); | |
065e3595 | 1169 | if (c1 < 0 || ! UTF_8_EXTRA_OCTET_P (c1)) |
df7492f9 KH |
1170 | break; |
1171 | if (UTF_8_2_OCTET_LEADING_P (c)) | |
aa72b389 | 1172 | { |
ff0dacd7 | 1173 | found = CATEGORY_MASK_UTF_8; |
df7492f9 | 1174 | continue; |
aa72b389 | 1175 | } |
df7492f9 | 1176 | ONE_MORE_BYTE (c2); |
065e3595 | 1177 | if (c2 < 0 || ! UTF_8_EXTRA_OCTET_P (c2)) |
df7492f9 KH |
1178 | break; |
1179 | if (UTF_8_3_OCTET_LEADING_P (c)) | |
aa72b389 | 1180 | { |
ff0dacd7 | 1181 | found = CATEGORY_MASK_UTF_8; |
df7492f9 | 1182 | continue; |
aa72b389 | 1183 | } |
df7492f9 | 1184 | ONE_MORE_BYTE (c3); |
065e3595 | 1185 | if (c3 < 0 || ! UTF_8_EXTRA_OCTET_P (c3)) |
df7492f9 KH |
1186 | break; |
1187 | if (UTF_8_4_OCTET_LEADING_P (c)) | |
aa72b389 | 1188 | { |
ff0dacd7 | 1189 | found = CATEGORY_MASK_UTF_8; |
df7492f9 KH |
1190 | continue; |
1191 | } | |
1192 | ONE_MORE_BYTE (c4); | |
065e3595 | 1193 | if (c4 < 0 || ! UTF_8_EXTRA_OCTET_P (c4)) |
df7492f9 KH |
1194 | break; |
1195 | if (UTF_8_5_OCTET_LEADING_P (c)) | |
1196 | { | |
ff0dacd7 | 1197 | found = CATEGORY_MASK_UTF_8; |
df7492f9 KH |
1198 | continue; |
1199 | } | |
1200 | break; | |
aa72b389 | 1201 | } |
ff0dacd7 | 1202 | detect_info->rejected |= CATEGORY_MASK_UTF_8; |
df7492f9 | 1203 | return 0; |
aa72b389 | 1204 | |
df7492f9 | 1205 | no_more_source: |
065e3595 | 1206 | if (src_base < src && coding->mode & CODING_MODE_LAST_BLOCK) |
aa72b389 | 1207 | { |
ff0dacd7 | 1208 | detect_info->rejected |= CATEGORY_MASK_UTF_8; |
89528eb3 | 1209 | return 0; |
aa72b389 | 1210 | } |
ff0dacd7 KH |
1211 | detect_info->found |= found; |
1212 | return 1; | |
aa72b389 KH |
1213 | } |
1214 | ||
4ed46869 | 1215 | |
b73bfc1c | 1216 | static void |
df7492f9 | 1217 | decode_coding_utf_8 (coding) |
b73bfc1c | 1218 | struct coding_system *coding; |
b73bfc1c | 1219 | { |
8f924df7 KH |
1220 | const unsigned char *src = coding->source + coding->consumed; |
1221 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
1222 | const unsigned char *src_base; | |
69a80ea3 KH |
1223 | int *charbuf = coding->charbuf + coding->charbuf_used; |
1224 | int *charbuf_end = coding->charbuf + coding->charbuf_size; | |
df7492f9 KH |
1225 | int consumed_chars = 0, consumed_chars_base; |
1226 | int multibytep = coding->src_multibyte; | |
24a73b0a | 1227 | Lisp_Object attr, charset_list; |
4ed46869 | 1228 | |
24a73b0a | 1229 | CODING_GET_INFO (coding, attr, charset_list); |
df7492f9 KH |
1230 | |
1231 | while (1) | |
b73bfc1c | 1232 | { |
df7492f9 | 1233 | int c, c1, c2, c3, c4, c5; |
ec6d2bb8 | 1234 | |
df7492f9 KH |
1235 | src_base = src; |
1236 | consumed_chars_base = consumed_chars; | |
4af310db | 1237 | |
df7492f9 KH |
1238 | if (charbuf >= charbuf_end) |
1239 | break; | |
1240 | ||
1241 | ONE_MORE_BYTE (c1); | |
065e3595 KH |
1242 | if (c1 < 0) |
1243 | { | |
1244 | c = - c1; | |
1245 | } | |
1246 | else if (UTF_8_1_OCTET_P(c1)) | |
df7492f9 KH |
1247 | { |
1248 | c = c1; | |
4af310db | 1249 | } |
df7492f9 | 1250 | else |
4af310db | 1251 | { |
df7492f9 | 1252 | ONE_MORE_BYTE (c2); |
065e3595 | 1253 | if (c2 < 0 || ! UTF_8_EXTRA_OCTET_P (c2)) |
df7492f9 KH |
1254 | goto invalid_code; |
1255 | if (UTF_8_2_OCTET_LEADING_P (c1)) | |
4af310db | 1256 | { |
b0edb2c5 DL |
1257 | c = ((c1 & 0x1F) << 6) | (c2 & 0x3F); |
1258 | /* Reject overlong sequences here and below. Encoders | |
1259 | producing them are incorrect, they can be misleading, | |
1260 | and they mess up read/write invariance. */ | |
1261 | if (c < 128) | |
1262 | goto invalid_code; | |
4af310db | 1263 | } |
df7492f9 | 1264 | else |
aa72b389 | 1265 | { |
df7492f9 | 1266 | ONE_MORE_BYTE (c3); |
065e3595 | 1267 | if (c3 < 0 || ! UTF_8_EXTRA_OCTET_P (c3)) |
df7492f9 KH |
1268 | goto invalid_code; |
1269 | if (UTF_8_3_OCTET_LEADING_P (c1)) | |
b0edb2c5 DL |
1270 | { |
1271 | c = (((c1 & 0xF) << 12) | |
1272 | | ((c2 & 0x3F) << 6) | (c3 & 0x3F)); | |
72fe1301 DL |
1273 | if (c < 0x800 |
1274 | || (c >= 0xd800 && c < 0xe000)) /* surrogates (invalid) */ | |
b0edb2c5 DL |
1275 | goto invalid_code; |
1276 | } | |
df7492f9 KH |
1277 | else |
1278 | { | |
1279 | ONE_MORE_BYTE (c4); | |
065e3595 | 1280 | if (c4 < 0 || ! UTF_8_EXTRA_OCTET_P (c4)) |
df7492f9 KH |
1281 | goto invalid_code; |
1282 | if (UTF_8_4_OCTET_LEADING_P (c1)) | |
b0edb2c5 | 1283 | { |
df7492f9 KH |
1284 | c = (((c1 & 0x7) << 18) | ((c2 & 0x3F) << 12) |
1285 | | ((c3 & 0x3F) << 6) | (c4 & 0x3F)); | |
b0edb2c5 DL |
1286 | if (c < 0x10000) |
1287 | goto invalid_code; | |
1288 | } | |
df7492f9 KH |
1289 | else |
1290 | { | |
1291 | ONE_MORE_BYTE (c5); | |
065e3595 | 1292 | if (c5 < 0 || ! UTF_8_EXTRA_OCTET_P (c5)) |
df7492f9 KH |
1293 | goto invalid_code; |
1294 | if (UTF_8_5_OCTET_LEADING_P (c1)) | |
1295 | { | |
1296 | c = (((c1 & 0x3) << 24) | ((c2 & 0x3F) << 18) | |
1297 | | ((c3 & 0x3F) << 12) | ((c4 & 0x3F) << 6) | |
1298 | | (c5 & 0x3F)); | |
b0edb2c5 | 1299 | if ((c > MAX_CHAR) || (c < 0x200000)) |
df7492f9 KH |
1300 | goto invalid_code; |
1301 | } | |
1302 | else | |
1303 | goto invalid_code; | |
1304 | } | |
1305 | } | |
aa72b389 | 1306 | } |
b73bfc1c | 1307 | } |
df7492f9 KH |
1308 | |
1309 | *charbuf++ = c; | |
1310 | continue; | |
1311 | ||
1312 | invalid_code: | |
1313 | src = src_base; | |
1314 | consumed_chars = consumed_chars_base; | |
1315 | ONE_MORE_BYTE (c); | |
1316 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
1317 | coding->errors++; | |
aa72b389 KH |
1318 | } |
1319 | ||
df7492f9 KH |
1320 | no_more_source: |
1321 | coding->consumed_char += consumed_chars_base; | |
1322 | coding->consumed = src_base - coding->source; | |
1323 | coding->charbuf_used = charbuf - coding->charbuf; | |
1324 | } | |
1325 | ||
1326 | ||
1327 | static int | |
1328 | encode_coding_utf_8 (coding) | |
1329 | struct coding_system *coding; | |
1330 | { | |
1331 | int multibytep = coding->dst_multibyte; | |
1332 | int *charbuf = coding->charbuf; | |
1333 | int *charbuf_end = charbuf + coding->charbuf_used; | |
1334 | unsigned char *dst = coding->destination + coding->produced; | |
1335 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
e19c3639 | 1336 | int produced_chars = 0; |
df7492f9 KH |
1337 | int c; |
1338 | ||
1339 | if (multibytep) | |
aa72b389 | 1340 | { |
df7492f9 KH |
1341 | int safe_room = MAX_MULTIBYTE_LENGTH * 2; |
1342 | ||
1343 | while (charbuf < charbuf_end) | |
b73bfc1c | 1344 | { |
df7492f9 | 1345 | unsigned char str[MAX_MULTIBYTE_LENGTH], *p, *pend = str; |
8f924df7 | 1346 | |
df7492f9 KH |
1347 | ASSURE_DESTINATION (safe_room); |
1348 | c = *charbuf++; | |
28f67a95 KH |
1349 | if (CHAR_BYTE8_P (c)) |
1350 | { | |
1351 | c = CHAR_TO_BYTE8 (c); | |
1352 | EMIT_ONE_BYTE (c); | |
1353 | } | |
1354 | else | |
1355 | { | |
1356 | CHAR_STRING_ADVANCE (c, pend); | |
1357 | for (p = str; p < pend; p++) | |
1358 | EMIT_ONE_BYTE (*p); | |
1359 | } | |
b73bfc1c | 1360 | } |
aa72b389 | 1361 | } |
df7492f9 KH |
1362 | else |
1363 | { | |
1364 | int safe_room = MAX_MULTIBYTE_LENGTH; | |
1365 | ||
1366 | while (charbuf < charbuf_end) | |
b73bfc1c | 1367 | { |
df7492f9 KH |
1368 | ASSURE_DESTINATION (safe_room); |
1369 | c = *charbuf++; | |
f03caae0 KH |
1370 | if (CHAR_BYTE8_P (c)) |
1371 | *dst++ = CHAR_TO_BYTE8 (c); | |
1372 | else | |
1373 | dst += CHAR_STRING (c, dst); | |
df7492f9 | 1374 | produced_chars++; |
4ed46869 KH |
1375 | } |
1376 | } | |
065e3595 | 1377 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
1378 | coding->produced_char += produced_chars; |
1379 | coding->produced = dst - coding->destination; | |
1380 | return 0; | |
4ed46869 KH |
1381 | } |
1382 | ||
b73bfc1c | 1383 | |
df7492f9 | 1384 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
ff0dacd7 KH |
1385 | Check if a text is encoded in one of UTF-16 based coding systems. |
1386 | If it is, return 1, else return 0. */ | |
aa72b389 | 1387 | |
df7492f9 KH |
1388 | #define UTF_16_HIGH_SURROGATE_P(val) \ |
1389 | (((val) & 0xFC00) == 0xD800) | |
1390 | ||
1391 | #define UTF_16_LOW_SURROGATE_P(val) \ | |
1392 | (((val) & 0xFC00) == 0xDC00) | |
93dec019 | 1393 | |
df7492f9 KH |
1394 | #define UTF_16_INVALID_P(val) \ |
1395 | (((val) == 0xFFFE) \ | |
1396 | || ((val) == 0xFFFF) \ | |
1397 | || UTF_16_LOW_SURROGATE_P (val)) | |
aa72b389 | 1398 | |
aa72b389 | 1399 | |
df7492f9 | 1400 | static int |
ff0dacd7 | 1401 | detect_coding_utf_16 (coding, detect_info) |
aa72b389 | 1402 | struct coding_system *coding; |
ff0dacd7 | 1403 | struct coding_detection_info *detect_info; |
aa72b389 | 1404 | { |
8f924df7 KH |
1405 | const unsigned char *src = coding->source, *src_base = src; |
1406 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
df7492f9 KH |
1407 | int multibytep = coding->src_multibyte; |
1408 | int consumed_chars = 0; | |
1409 | int c1, c2; | |
aa72b389 | 1410 | |
ff0dacd7 | 1411 | detect_info->checked |= CATEGORY_MASK_UTF_16; |
ff0dacd7 | 1412 | if (coding->mode & CODING_MODE_LAST_BLOCK |
24a73b0a | 1413 | && (coding->src_chars & 1)) |
ff0dacd7 KH |
1414 | { |
1415 | detect_info->rejected |= CATEGORY_MASK_UTF_16; | |
1416 | return 0; | |
1417 | } | |
24a73b0a | 1418 | |
df7492f9 KH |
1419 | ONE_MORE_BYTE (c1); |
1420 | ONE_MORE_BYTE (c2); | |
df7492f9 | 1421 | if ((c1 == 0xFF) && (c2 == 0xFE)) |
aa72b389 | 1422 | { |
b49a1807 KH |
1423 | detect_info->found |= (CATEGORY_MASK_UTF_16_LE |
1424 | | CATEGORY_MASK_UTF_16_AUTO); | |
24a73b0a KH |
1425 | detect_info->rejected |= (CATEGORY_MASK_UTF_16_BE |
1426 | | CATEGORY_MASK_UTF_16_BE_NOSIG | |
1427 | | CATEGORY_MASK_UTF_16_LE_NOSIG); | |
aa72b389 | 1428 | } |
df7492f9 | 1429 | else if ((c1 == 0xFE) && (c2 == 0xFF)) |
ff0dacd7 | 1430 | { |
b49a1807 KH |
1431 | detect_info->found |= (CATEGORY_MASK_UTF_16_BE |
1432 | | CATEGORY_MASK_UTF_16_AUTO); | |
24a73b0a KH |
1433 | detect_info->rejected |= (CATEGORY_MASK_UTF_16_LE |
1434 | | CATEGORY_MASK_UTF_16_BE_NOSIG | |
1435 | | CATEGORY_MASK_UTF_16_LE_NOSIG); | |
1436 | } | |
065e3595 | 1437 | else if (c1 >= 0 && c2 >= 0) |
24a73b0a | 1438 | { |
24a73b0a KH |
1439 | detect_info->rejected |
1440 | |= (CATEGORY_MASK_UTF_16_BE | CATEGORY_MASK_UTF_16_LE); | |
ff0dacd7 | 1441 | } |
df7492f9 | 1442 | no_more_source: |
ff0dacd7 | 1443 | return 1; |
df7492f9 | 1444 | } |
aa72b389 | 1445 | |
df7492f9 KH |
1446 | static void |
1447 | decode_coding_utf_16 (coding) | |
1448 | struct coding_system *coding; | |
1449 | { | |
8f924df7 KH |
1450 | const unsigned char *src = coding->source + coding->consumed; |
1451 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
1452 | const unsigned char *src_base; | |
69a80ea3 KH |
1453 | int *charbuf = coding->charbuf + coding->charbuf_used; |
1454 | int *charbuf_end = coding->charbuf + coding->charbuf_size; | |
df7492f9 KH |
1455 | int consumed_chars = 0, consumed_chars_base; |
1456 | int multibytep = coding->src_multibyte; | |
1457 | enum utf_16_bom_type bom = CODING_UTF_16_BOM (coding); | |
1458 | enum utf_16_endian_type endian = CODING_UTF_16_ENDIAN (coding); | |
1459 | int surrogate = CODING_UTF_16_SURROGATE (coding); | |
24a73b0a | 1460 | Lisp_Object attr, charset_list; |
df7492f9 | 1461 | |
24a73b0a | 1462 | CODING_GET_INFO (coding, attr, charset_list); |
df7492f9 | 1463 | |
b49a1807 | 1464 | if (bom == utf_16_with_bom) |
aa72b389 | 1465 | { |
df7492f9 | 1466 | int c, c1, c2; |
4af310db | 1467 | |
aa72b389 | 1468 | src_base = src; |
df7492f9 KH |
1469 | ONE_MORE_BYTE (c1); |
1470 | ONE_MORE_BYTE (c2); | |
e19c3639 | 1471 | c = (c1 << 8) | c2; |
aa72b389 | 1472 | |
b49a1807 KH |
1473 | if (endian == utf_16_big_endian |
1474 | ? c != 0xFEFF : c != 0xFFFE) | |
aa72b389 | 1475 | { |
b49a1807 KH |
1476 | /* The first two bytes are not BOM. Treat them as bytes |
1477 | for a normal character. */ | |
1478 | src = src_base; | |
1479 | coding->errors++; | |
aa72b389 | 1480 | } |
b49a1807 KH |
1481 | CODING_UTF_16_BOM (coding) = utf_16_without_bom; |
1482 | } | |
1483 | else if (bom == utf_16_detect_bom) | |
1484 | { | |
1485 | /* We have already tried to detect BOM and failed in | |
1486 | detect_coding. */ | |
1487 | CODING_UTF_16_BOM (coding) = utf_16_without_bom; | |
df7492f9 | 1488 | } |
aa72b389 | 1489 | |
df7492f9 KH |
1490 | while (1) |
1491 | { | |
1492 | int c, c1, c2; | |
1493 | ||
1494 | src_base = src; | |
1495 | consumed_chars_base = consumed_chars; | |
1496 | ||
1497 | if (charbuf + 2 >= charbuf_end) | |
1498 | break; | |
1499 | ||
1500 | ONE_MORE_BYTE (c1); | |
065e3595 KH |
1501 | if (c1 < 0) |
1502 | { | |
1503 | *charbuf++ = -c1; | |
1504 | continue; | |
1505 | } | |
df7492f9 | 1506 | ONE_MORE_BYTE (c2); |
065e3595 KH |
1507 | if (c2 < 0) |
1508 | { | |
1509 | *charbuf++ = ASCII_BYTE_P (c1) ? c1 : BYTE8_TO_CHAR (c1); | |
1510 | *charbuf++ = -c2; | |
1511 | continue; | |
1512 | } | |
df7492f9 | 1513 | c = (endian == utf_16_big_endian |
e19c3639 | 1514 | ? ((c1 << 8) | c2) : ((c2 << 8) | c1)); |
df7492f9 | 1515 | if (surrogate) |
fd3ae0b9 | 1516 | { |
df7492f9 | 1517 | if (! UTF_16_LOW_SURROGATE_P (c)) |
fd3ae0b9 | 1518 | { |
df7492f9 KH |
1519 | if (endian == utf_16_big_endian) |
1520 | c1 = surrogate >> 8, c2 = surrogate & 0xFF; | |
1521 | else | |
1522 | c1 = surrogate & 0xFF, c2 = surrogate >> 8; | |
1523 | *charbuf++ = c1; | |
1524 | *charbuf++ = c2; | |
1525 | coding->errors++; | |
1526 | if (UTF_16_HIGH_SURROGATE_P (c)) | |
1527 | CODING_UTF_16_SURROGATE (coding) = surrogate = c; | |
fd3ae0b9 | 1528 | else |
df7492f9 | 1529 | *charbuf++ = c; |
fd3ae0b9 KH |
1530 | } |
1531 | else | |
df7492f9 KH |
1532 | { |
1533 | c = ((surrogate - 0xD800) << 10) | (c - 0xDC00); | |
1534 | CODING_UTF_16_SURROGATE (coding) = surrogate = 0; | |
29f7ffd0 | 1535 | *charbuf++ = 0x10000 + c; |
df7492f9 | 1536 | } |
fd3ae0b9 | 1537 | } |
aa72b389 | 1538 | else |
df7492f9 KH |
1539 | { |
1540 | if (UTF_16_HIGH_SURROGATE_P (c)) | |
1541 | CODING_UTF_16_SURROGATE (coding) = surrogate = c; | |
1542 | else | |
1543 | *charbuf++ = c; | |
8f924df7 | 1544 | } |
aa72b389 | 1545 | } |
df7492f9 KH |
1546 | |
1547 | no_more_source: | |
1548 | coding->consumed_char += consumed_chars_base; | |
1549 | coding->consumed = src_base - coding->source; | |
1550 | coding->charbuf_used = charbuf - coding->charbuf; | |
aa72b389 | 1551 | } |
b73bfc1c | 1552 | |
df7492f9 KH |
1553 | static int |
1554 | encode_coding_utf_16 (coding) | |
1555 | struct coding_system *coding; | |
1556 | { | |
1557 | int multibytep = coding->dst_multibyte; | |
1558 | int *charbuf = coding->charbuf; | |
1559 | int *charbuf_end = charbuf + coding->charbuf_used; | |
1560 | unsigned char *dst = coding->destination + coding->produced; | |
1561 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
1562 | int safe_room = 8; | |
1563 | enum utf_16_bom_type bom = CODING_UTF_16_BOM (coding); | |
1564 | int big_endian = CODING_UTF_16_ENDIAN (coding) == utf_16_big_endian; | |
1565 | int produced_chars = 0; | |
24a73b0a | 1566 | Lisp_Object attrs, charset_list; |
df7492f9 | 1567 | int c; |
4ed46869 | 1568 | |
24a73b0a | 1569 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 | 1570 | |
b49a1807 | 1571 | if (bom != utf_16_without_bom) |
df7492f9 KH |
1572 | { |
1573 | ASSURE_DESTINATION (safe_room); | |
1574 | if (big_endian) | |
df7492f9 | 1575 | EMIT_TWO_BYTES (0xFE, 0xFF); |
880cf180 KH |
1576 | else |
1577 | EMIT_TWO_BYTES (0xFF, 0xFE); | |
df7492f9 KH |
1578 | CODING_UTF_16_BOM (coding) = utf_16_without_bom; |
1579 | } | |
1580 | ||
1581 | while (charbuf < charbuf_end) | |
1582 | { | |
1583 | ASSURE_DESTINATION (safe_room); | |
1584 | c = *charbuf++; | |
e19c3639 KH |
1585 | if (c >= MAX_UNICODE_CHAR) |
1586 | c = coding->default_char; | |
df7492f9 KH |
1587 | |
1588 | if (c < 0x10000) | |
1589 | { | |
1590 | if (big_endian) | |
1591 | EMIT_TWO_BYTES (c >> 8, c & 0xFF); | |
1592 | else | |
1593 | EMIT_TWO_BYTES (c & 0xFF, c >> 8); | |
1594 | } | |
1595 | else | |
1596 | { | |
1597 | int c1, c2; | |
1598 | ||
1599 | c -= 0x10000; | |
1600 | c1 = (c >> 10) + 0xD800; | |
1601 | c2 = (c & 0x3FF) + 0xDC00; | |
1602 | if (big_endian) | |
1603 | EMIT_FOUR_BYTES (c1 >> 8, c1 & 0xFF, c2 >> 8, c2 & 0xFF); | |
1604 | else | |
1605 | EMIT_FOUR_BYTES (c1 & 0xFF, c1 >> 8, c2 & 0xFF, c2 >> 8); | |
1606 | } | |
1607 | } | |
065e3595 | 1608 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
1609 | coding->produced = dst - coding->destination; |
1610 | coding->produced_char += produced_chars; | |
1611 | return 0; | |
1612 | } | |
1613 | ||
1614 | \f | |
1615 | /*** 6. Old Emacs' internal format (emacs-mule) ***/ | |
1616 | ||
1617 | /* Emacs' internal format for representation of multiple character | |
1618 | sets is a kind of multi-byte encoding, i.e. characters are | |
1619 | represented by variable-length sequences of one-byte codes. | |
1620 | ||
1621 | ASCII characters and control characters (e.g. `tab', `newline') are | |
1622 | represented by one-byte sequences which are their ASCII codes, in | |
1623 | the range 0x00 through 0x7F. | |
1624 | ||
1625 | 8-bit characters of the range 0x80..0x9F are represented by | |
1626 | two-byte sequences of LEADING_CODE_8_BIT_CONTROL and (their 8-bit | |
1627 | code + 0x20). | |
1628 | ||
1629 | 8-bit characters of the range 0xA0..0xFF are represented by | |
1630 | one-byte sequences which are their 8-bit code. | |
1631 | ||
1632 | The other characters are represented by a sequence of `base | |
1633 | leading-code', optional `extended leading-code', and one or two | |
1634 | `position-code's. The length of the sequence is determined by the | |
1635 | base leading-code. Leading-code takes the range 0x81 through 0x9D, | |
1636 | whereas extended leading-code and position-code take the range 0xA0 | |
1637 | through 0xFF. See `charset.h' for more details about leading-code | |
1638 | and position-code. | |
1639 | ||
1640 | --- CODE RANGE of Emacs' internal format --- | |
1641 | character set range | |
1642 | ------------- ----- | |
1643 | ascii 0x00..0x7F | |
1644 | eight-bit-control LEADING_CODE_8_BIT_CONTROL + 0xA0..0xBF | |
1645 | eight-bit-graphic 0xA0..0xBF | |
1646 | ELSE 0x81..0x9D + [0xA0..0xFF]+ | |
1647 | --------------------------------------------- | |
1648 | ||
1649 | As this is the internal character representation, the format is | |
1650 | usually not used externally (i.e. in a file or in a data sent to a | |
1651 | process). But, it is possible to have a text externally in this | |
1652 | format (i.e. by encoding by the coding system `emacs-mule'). | |
1653 | ||
1654 | In that case, a sequence of one-byte codes has a slightly different | |
1655 | form. | |
1656 | ||
1657 | At first, all characters in eight-bit-control are represented by | |
1658 | one-byte sequences which are their 8-bit code. | |
1659 | ||
1660 | Next, character composition data are represented by the byte | |
1661 | sequence of the form: 0x80 METHOD BYTES CHARS COMPONENT ..., | |
1662 | where, | |
1663 | METHOD is 0xF0 plus one of composition method (enum | |
1664 | composition_method), | |
1665 | ||
1666 | BYTES is 0xA0 plus a byte length of this composition data, | |
1667 | ||
1668 | CHARS is 0x20 plus a number of characters composed by this | |
1669 | data, | |
1670 | ||
1671 | COMPONENTs are characters of multibye form or composition | |
1672 | rules encoded by two-byte of ASCII codes. | |
1673 | ||
1674 | In addition, for backward compatibility, the following formats are | |
1675 | also recognized as composition data on decoding. | |
1676 | ||
1677 | 0x80 MSEQ ... | |
1678 | 0x80 0xFF MSEQ RULE MSEQ RULE ... MSEQ | |
1679 | ||
1680 | Here, | |
1681 | MSEQ is a multibyte form but in these special format: | |
1682 | ASCII: 0xA0 ASCII_CODE+0x80, | |
1683 | other: LEADING_CODE+0x20 FOLLOWING-BYTE ..., | |
1684 | RULE is a one byte code of the range 0xA0..0xF0 that | |
1685 | represents a composition rule. | |
1686 | */ | |
1687 | ||
1688 | char emacs_mule_bytes[256]; | |
1689 | ||
df7492f9 | 1690 | int |
ff0dacd7 | 1691 | emacs_mule_char (coding, src, nbytes, nchars, id) |
df7492f9 | 1692 | struct coding_system *coding; |
065e3595 | 1693 | const unsigned char *src; |
ff0dacd7 | 1694 | int *nbytes, *nchars, *id; |
df7492f9 | 1695 | { |
8f924df7 KH |
1696 | const unsigned char *src_end = coding->source + coding->src_bytes; |
1697 | const unsigned char *src_base = src; | |
df7492f9 | 1698 | int multibytep = coding->src_multibyte; |
df7492f9 KH |
1699 | struct charset *charset; |
1700 | unsigned code; | |
1701 | int c; | |
1702 | int consumed_chars = 0; | |
1703 | ||
1704 | ONE_MORE_BYTE (c); | |
065e3595 | 1705 | if (c < 0) |
df7492f9 | 1706 | { |
065e3595 KH |
1707 | c = -c; |
1708 | charset = emacs_mule_charset[0]; | |
1709 | } | |
1710 | else | |
1711 | { | |
4d41e8b7 KH |
1712 | if (c >= 0xA0) |
1713 | { | |
1714 | /* Old style component character of a compostion. */ | |
1715 | if (c == 0xA0) | |
1716 | { | |
1717 | ONE_MORE_BYTE (c); | |
1718 | c -= 0x80; | |
1719 | } | |
1720 | else | |
1721 | c -= 0x20; | |
1722 | } | |
1723 | ||
065e3595 | 1724 | switch (emacs_mule_bytes[c]) |
b73bfc1c | 1725 | { |
065e3595 | 1726 | case 2: |
df7492f9 KH |
1727 | if (! (charset = emacs_mule_charset[c])) |
1728 | goto invalid_code; | |
1729 | ONE_MORE_BYTE (c); | |
9ffd559c | 1730 | if (c < 0xA0) |
065e3595 | 1731 | goto invalid_code; |
df7492f9 | 1732 | code = c & 0x7F; |
065e3595 KH |
1733 | break; |
1734 | ||
1735 | case 3: | |
1736 | if (c == EMACS_MULE_LEADING_CODE_PRIVATE_11 | |
1737 | || c == EMACS_MULE_LEADING_CODE_PRIVATE_12) | |
1738 | { | |
1739 | ONE_MORE_BYTE (c); | |
9ffd559c | 1740 | if (c < 0xA0 || ! (charset = emacs_mule_charset[c])) |
065e3595 KH |
1741 | goto invalid_code; |
1742 | ONE_MORE_BYTE (c); | |
9ffd559c | 1743 | if (c < 0xA0) |
065e3595 KH |
1744 | goto invalid_code; |
1745 | code = c & 0x7F; | |
1746 | } | |
1747 | else | |
1748 | { | |
1749 | if (! (charset = emacs_mule_charset[c])) | |
1750 | goto invalid_code; | |
1751 | ONE_MORE_BYTE (c); | |
9ffd559c | 1752 | if (c < 0xA0) |
065e3595 KH |
1753 | goto invalid_code; |
1754 | code = (c & 0x7F) << 8; | |
1755 | ONE_MORE_BYTE (c); | |
9ffd559c | 1756 | if (c < 0xA0) |
065e3595 KH |
1757 | goto invalid_code; |
1758 | code |= c & 0x7F; | |
1759 | } | |
1760 | break; | |
1761 | ||
1762 | case 4: | |
1763 | ONE_MORE_BYTE (c); | |
1764 | if (c < 0 || ! (charset = emacs_mule_charset[c])) | |
df7492f9 KH |
1765 | goto invalid_code; |
1766 | ONE_MORE_BYTE (c); | |
9ffd559c | 1767 | if (c < 0xA0) |
065e3595 | 1768 | goto invalid_code; |
781d7a48 | 1769 | code = (c & 0x7F) << 8; |
df7492f9 | 1770 | ONE_MORE_BYTE (c); |
9ffd559c | 1771 | if (c < 0xA0) |
065e3595 | 1772 | goto invalid_code; |
df7492f9 | 1773 | code |= c & 0x7F; |
065e3595 | 1774 | break; |
df7492f9 | 1775 | |
065e3595 KH |
1776 | case 1: |
1777 | code = c; | |
1778 | charset = CHARSET_FROM_ID (ASCII_BYTE_P (code) | |
1779 | ? charset_ascii : charset_eight_bit); | |
1780 | break; | |
df7492f9 | 1781 | |
065e3595 KH |
1782 | default: |
1783 | abort (); | |
1784 | } | |
1785 | c = DECODE_CHAR (charset, code); | |
1786 | if (c < 0) | |
1787 | goto invalid_code; | |
df7492f9 | 1788 | } |
df7492f9 KH |
1789 | *nbytes = src - src_base; |
1790 | *nchars = consumed_chars; | |
ff0dacd7 KH |
1791 | if (id) |
1792 | *id = charset->id; | |
df7492f9 KH |
1793 | return c; |
1794 | ||
1795 | no_more_source: | |
1796 | return -2; | |
1797 | ||
1798 | invalid_code: | |
1799 | return -1; | |
1800 | } | |
1801 | ||
1802 | ||
1803 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
ff0dacd7 KH |
1804 | Check if a text is encoded in `emacs-mule'. If it is, return 1, |
1805 | else return 0. */ | |
df7492f9 KH |
1806 | |
1807 | static int | |
ff0dacd7 | 1808 | detect_coding_emacs_mule (coding, detect_info) |
df7492f9 | 1809 | struct coding_system *coding; |
ff0dacd7 | 1810 | struct coding_detection_info *detect_info; |
df7492f9 | 1811 | { |
065e3595 | 1812 | const unsigned char *src = coding->source, *src_base; |
8f924df7 | 1813 | const unsigned char *src_end = coding->source + coding->src_bytes; |
df7492f9 KH |
1814 | int multibytep = coding->src_multibyte; |
1815 | int consumed_chars = 0; | |
1816 | int c; | |
1817 | int found = 0; | |
1818 | ||
ff0dacd7 | 1819 | detect_info->checked |= CATEGORY_MASK_EMACS_MULE; |
df7492f9 KH |
1820 | /* A coding system of this category is always ASCII compatible. */ |
1821 | src += coding->head_ascii; | |
1822 | ||
1823 | while (1) | |
1824 | { | |
065e3595 | 1825 | src_base = src; |
df7492f9 | 1826 | ONE_MORE_BYTE (c); |
065e3595 KH |
1827 | if (c < 0) |
1828 | continue; | |
df7492f9 KH |
1829 | if (c == 0x80) |
1830 | { | |
1831 | /* Perhaps the start of composite character. We simple skip | |
1832 | it because analyzing it is too heavy for detecting. But, | |
1833 | at least, we check that the composite character | |
1834 | constitues of more than 4 bytes. */ | |
8f924df7 | 1835 | const unsigned char *src_base; |
df7492f9 KH |
1836 | |
1837 | repeat: | |
1838 | src_base = src; | |
1839 | do | |
1840 | { | |
1841 | ONE_MORE_BYTE (c); | |
1842 | } | |
1843 | while (c >= 0xA0); | |
1844 | ||
1845 | if (src - src_base <= 4) | |
1846 | break; | |
ff0dacd7 | 1847 | found = CATEGORY_MASK_EMACS_MULE; |
df7492f9 KH |
1848 | if (c == 0x80) |
1849 | goto repeat; | |
b73bfc1c | 1850 | } |
df7492f9 KH |
1851 | |
1852 | if (c < 0x80) | |
b73bfc1c | 1853 | { |
df7492f9 KH |
1854 | if (c < 0x20 |
1855 | && (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)) | |
1856 | break; | |
1857 | } | |
1858 | else | |
1859 | { | |
0e219d54 | 1860 | int more_bytes = emacs_mule_bytes[*src_base] - 1; |
df7492f9 | 1861 | |
0e219d54 | 1862 | while (more_bytes > 0) |
df7492f9 KH |
1863 | { |
1864 | ONE_MORE_BYTE (c); | |
0e219d54 KH |
1865 | if (c < 0xA0) |
1866 | { | |
1867 | src--; /* Unread the last byte. */ | |
1868 | break; | |
1869 | } | |
1870 | more_bytes--; | |
df7492f9 | 1871 | } |
0e219d54 | 1872 | if (more_bytes != 0) |
df7492f9 | 1873 | break; |
ff0dacd7 | 1874 | found = CATEGORY_MASK_EMACS_MULE; |
4ed46869 KH |
1875 | } |
1876 | } | |
ff0dacd7 | 1877 | detect_info->rejected |= CATEGORY_MASK_EMACS_MULE; |
df7492f9 KH |
1878 | return 0; |
1879 | ||
1880 | no_more_source: | |
065e3595 | 1881 | if (src_base < src && coding->mode & CODING_MODE_LAST_BLOCK) |
89528eb3 | 1882 | { |
ff0dacd7 | 1883 | detect_info->rejected |= CATEGORY_MASK_EMACS_MULE; |
89528eb3 KH |
1884 | return 0; |
1885 | } | |
ff0dacd7 KH |
1886 | detect_info->found |= found; |
1887 | return 1; | |
4ed46869 KH |
1888 | } |
1889 | ||
b73bfc1c | 1890 | |
df7492f9 KH |
1891 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
1892 | ||
1893 | /* Decode a character represented as a component of composition | |
1894 | sequence of Emacs 20/21 style at SRC. Set C to that character and | |
1895 | update SRC to the head of next character (or an encoded composition | |
1896 | rule). If SRC doesn't points a composition component, set C to -1. | |
1897 | If SRC points an invalid byte sequence, global exit by a return | |
1898 | value 0. */ | |
1899 | ||
1900 | #define DECODE_EMACS_MULE_COMPOSITION_CHAR(buf) \ | |
f937a7db | 1901 | do \ |
df7492f9 KH |
1902 | { \ |
1903 | int c; \ | |
1904 | int nbytes, nchars; \ | |
1905 | \ | |
1906 | if (src == src_end) \ | |
1907 | break; \ | |
ff0dacd7 | 1908 | c = emacs_mule_char (coding, src, &nbytes, &nchars, NULL);\ |
df7492f9 KH |
1909 | if (c < 0) \ |
1910 | { \ | |
1911 | if (c == -2) \ | |
1912 | break; \ | |
1913 | goto invalid_code; \ | |
1914 | } \ | |
1915 | *buf++ = c; \ | |
1916 | src += nbytes; \ | |
1917 | consumed_chars += nchars; \ | |
1918 | } \ | |
f937a7db | 1919 | while (0) |
df7492f9 KH |
1920 | |
1921 | ||
1922 | /* Decode a composition rule represented as a component of composition | |
781d7a48 KH |
1923 | sequence of Emacs 20 style at SRC. Store the decoded rule in *BUF, |
1924 | and increment BUF. If SRC points an invalid byte sequence, set C | |
1925 | to -1. */ | |
df7492f9 | 1926 | |
781d7a48 | 1927 | #define DECODE_EMACS_MULE_COMPOSITION_RULE_20(buf) \ |
df7492f9 KH |
1928 | do { \ |
1929 | int c, gref, nref; \ | |
1930 | \ | |
781d7a48 | 1931 | if (src >= src_end) \ |
df7492f9 KH |
1932 | goto invalid_code; \ |
1933 | ONE_MORE_BYTE_NO_CHECK (c); \ | |
4d41e8b7 | 1934 | c -= 0xA0; \ |
df7492f9 KH |
1935 | if (c < 0 || c >= 81) \ |
1936 | goto invalid_code; \ | |
1937 | \ | |
1938 | gref = c / 9, nref = c % 9; \ | |
1939 | *buf++ = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
1940 | } while (0) | |
1941 | ||
1942 | ||
781d7a48 KH |
1943 | /* Decode a composition rule represented as a component of composition |
1944 | sequence of Emacs 21 style at SRC. Store the decoded rule in *BUF, | |
1945 | and increment BUF. If SRC points an invalid byte sequence, set C | |
1946 | to -1. */ | |
1947 | ||
1948 | #define DECODE_EMACS_MULE_COMPOSITION_RULE_21(buf) \ | |
1949 | do { \ | |
1950 | int gref, nref; \ | |
1951 | \ | |
1952 | if (src + 1>= src_end) \ | |
1953 | goto invalid_code; \ | |
1954 | ONE_MORE_BYTE_NO_CHECK (gref); \ | |
1955 | gref -= 0x20; \ | |
1956 | ONE_MORE_BYTE_NO_CHECK (nref); \ | |
1957 | nref -= 0x20; \ | |
1958 | if (gref < 0 || gref >= 81 \ | |
1959 | || nref < 0 || nref >= 81) \ | |
1960 | goto invalid_code; \ | |
1961 | *buf++ = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
1962 | } while (0) | |
1963 | ||
1964 | ||
df7492f9 | 1965 | #define DECODE_EMACS_MULE_21_COMPOSITION(c) \ |
aa72b389 | 1966 | do { \ |
df7492f9 | 1967 | /* Emacs 21 style format. The first three bytes at SRC are \ |
781d7a48 | 1968 | (METHOD - 0xF2), (BYTES - 0xA0), (CHARS - 0xA0), where BYTES is \ |
df7492f9 KH |
1969 | the byte length of this composition information, CHARS is the \ |
1970 | number of characters composed by this composition. */ \ | |
781d7a48 KH |
1971 | enum composition_method method = c - 0xF2; \ |
1972 | int *charbuf_base = charbuf; \ | |
df7492f9 KH |
1973 | int consumed_chars_limit; \ |
1974 | int nbytes, nchars; \ | |
1975 | \ | |
1976 | ONE_MORE_BYTE (c); \ | |
065e3595 KH |
1977 | if (c < 0) \ |
1978 | goto invalid_code; \ | |
df7492f9 KH |
1979 | nbytes = c - 0xA0; \ |
1980 | if (nbytes < 3) \ | |
1981 | goto invalid_code; \ | |
1982 | ONE_MORE_BYTE (c); \ | |
065e3595 KH |
1983 | if (c < 0) \ |
1984 | goto invalid_code; \ | |
df7492f9 | 1985 | nchars = c - 0xA0; \ |
69a80ea3 | 1986 | ADD_COMPOSITION_DATA (charbuf, nchars, method); \ |
df7492f9 KH |
1987 | consumed_chars_limit = consumed_chars_base + nbytes; \ |
1988 | if (method != COMPOSITION_RELATIVE) \ | |
aa72b389 | 1989 | { \ |
df7492f9 KH |
1990 | int i = 0; \ |
1991 | while (consumed_chars < consumed_chars_limit) \ | |
aa72b389 | 1992 | { \ |
df7492f9 | 1993 | if (i % 2 && method != COMPOSITION_WITH_ALTCHARS) \ |
781d7a48 | 1994 | DECODE_EMACS_MULE_COMPOSITION_RULE_21 (charbuf); \ |
df7492f9 KH |
1995 | else \ |
1996 | DECODE_EMACS_MULE_COMPOSITION_CHAR (charbuf); \ | |
781d7a48 | 1997 | i++; \ |
aa72b389 | 1998 | } \ |
df7492f9 KH |
1999 | if (consumed_chars < consumed_chars_limit) \ |
2000 | goto invalid_code; \ | |
781d7a48 | 2001 | charbuf_base[0] -= i; \ |
aa72b389 KH |
2002 | } \ |
2003 | } while (0) | |
93dec019 | 2004 | |
aa72b389 | 2005 | |
d959f512 KH |
2006 | #define DECODE_EMACS_MULE_20_RELATIVE_COMPOSITION(c) \ |
2007 | do { \ | |
2008 | /* Emacs 20 style format for relative composition. */ \ | |
2009 | /* Store multibyte form of characters to be composed. */ \ | |
2010 | enum composition_method method = COMPOSITION_RELATIVE; \ | |
2011 | int components[MAX_COMPOSITION_COMPONENTS * 2 - 1]; \ | |
2012 | int *buf = components; \ | |
2013 | int i, j; \ | |
2014 | \ | |
2015 | src = src_base; \ | |
2016 | ONE_MORE_BYTE (c); /* skip 0x80 */ \ | |
2017 | for (i = 0; *src >= 0xA0 && i < MAX_COMPOSITION_COMPONENTS; i++) \ | |
2018 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ | |
2019 | if (i < 2) \ | |
2020 | goto invalid_code; \ | |
2021 | ADD_COMPOSITION_DATA (charbuf, i, method); \ | |
2022 | for (j = 0; j < i; j++) \ | |
2023 | *charbuf++ = components[j]; \ | |
df7492f9 KH |
2024 | } while (0) |
2025 | ||
2026 | ||
2027 | #define DECODE_EMACS_MULE_20_RULEBASE_COMPOSITION(c) \ | |
2028 | do { \ | |
2029 | /* Emacs 20 style format for rule-base composition. */ \ | |
2030 | /* Store multibyte form of characters to be composed. */ \ | |
ff0dacd7 | 2031 | enum composition_method method = COMPOSITION_WITH_RULE; \ |
4d41e8b7 | 2032 | int *charbuf_base = charbuf; \ |
df7492f9 KH |
2033 | int components[MAX_COMPOSITION_COMPONENTS * 2 - 1]; \ |
2034 | int *buf = components; \ | |
2035 | int i, j; \ | |
4d41e8b7 | 2036 | \ |
df7492f9 | 2037 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ |
4d41e8b7 | 2038 | for (i = 1; i < MAX_COMPOSITION_COMPONENTS; i++) \ |
df7492f9 | 2039 | { \ |
4d41e8b7 KH |
2040 | if (*src < 0xA0) \ |
2041 | break; \ | |
781d7a48 | 2042 | DECODE_EMACS_MULE_COMPOSITION_RULE_20 (buf); \ |
df7492f9 KH |
2043 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ |
2044 | } \ | |
4d41e8b7 | 2045 | if (i <= 1 || (buf - components) % 2 == 0) \ |
df7492f9 | 2046 | goto invalid_code; \ |
4d41e8b7 | 2047 | if (charbuf + i + (i / 2) + 1 >= charbuf_end) \ |
df7492f9 | 2048 | goto no_more_source; \ |
4d41e8b7 KH |
2049 | ADD_COMPOSITION_DATA (charbuf, i, method); \ |
2050 | i = i * 2 - 1; \ | |
df7492f9 KH |
2051 | for (j = 0; j < i; j++) \ |
2052 | *charbuf++ = components[j]; \ | |
4d41e8b7 | 2053 | charbuf_base[0] -= i; \ |
df7492f9 KH |
2054 | for (j = 0; j < i; j += 2) \ |
2055 | *charbuf++ = components[j]; \ | |
2056 | } while (0) | |
2057 | ||
aa72b389 KH |
2058 | |
2059 | static void | |
df7492f9 | 2060 | decode_coding_emacs_mule (coding) |
aa72b389 | 2061 | struct coding_system *coding; |
aa72b389 | 2062 | { |
8f924df7 KH |
2063 | const unsigned char *src = coding->source + coding->consumed; |
2064 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
2065 | const unsigned char *src_base; | |
69a80ea3 KH |
2066 | int *charbuf = coding->charbuf + coding->charbuf_used; |
2067 | int *charbuf_end | |
2068 | = coding->charbuf + coding->charbuf_size - MAX_ANNOTATION_LENGTH; | |
df7492f9 | 2069 | int consumed_chars = 0, consumed_chars_base; |
df7492f9 | 2070 | int multibytep = coding->src_multibyte; |
24a73b0a | 2071 | Lisp_Object attrs, charset_list; |
ff0dacd7 KH |
2072 | int char_offset = coding->produced_char; |
2073 | int last_offset = char_offset; | |
2074 | int last_id = charset_ascii; | |
aa72b389 | 2075 | |
24a73b0a | 2076 | CODING_GET_INFO (coding, attrs, charset_list); |
aa72b389 | 2077 | |
aa72b389 KH |
2078 | while (1) |
2079 | { | |
df7492f9 KH |
2080 | int c; |
2081 | ||
aa72b389 | 2082 | src_base = src; |
df7492f9 KH |
2083 | consumed_chars_base = consumed_chars; |
2084 | ||
2085 | if (charbuf >= charbuf_end) | |
2086 | break; | |
aa72b389 | 2087 | |
df7492f9 | 2088 | ONE_MORE_BYTE (c); |
065e3595 KH |
2089 | if (c < 0) |
2090 | { | |
2091 | *charbuf++ = -c; | |
2092 | char_offset++; | |
2093 | } | |
2094 | else if (c < 0x80) | |
aa72b389 | 2095 | { |
df7492f9 KH |
2096 | *charbuf++ = c; |
2097 | char_offset++; | |
aa72b389 | 2098 | } |
df7492f9 KH |
2099 | else if (c == 0x80) |
2100 | { | |
df7492f9 | 2101 | ONE_MORE_BYTE (c); |
065e3595 KH |
2102 | if (c < 0) |
2103 | goto invalid_code; | |
781d7a48 KH |
2104 | if (c - 0xF2 >= COMPOSITION_RELATIVE |
2105 | && c - 0xF2 <= COMPOSITION_WITH_RULE_ALTCHARS) | |
df7492f9 KH |
2106 | DECODE_EMACS_MULE_21_COMPOSITION (c); |
2107 | else if (c < 0xC0) | |
2108 | DECODE_EMACS_MULE_20_RELATIVE_COMPOSITION (c); | |
2109 | else if (c == 0xFF) | |
2110 | DECODE_EMACS_MULE_20_RULEBASE_COMPOSITION (c); | |
2111 | else | |
2112 | goto invalid_code; | |
2113 | } | |
2114 | else if (c < 0xA0 && emacs_mule_bytes[c] > 1) | |
2115 | { | |
2116 | int nbytes, nchars; | |
ff0dacd7 KH |
2117 | int id; |
2118 | ||
781d7a48 KH |
2119 | src = src_base; |
2120 | consumed_chars = consumed_chars_base; | |
ff0dacd7 | 2121 | c = emacs_mule_char (coding, src, &nbytes, &nchars, &id); |
df7492f9 KH |
2122 | if (c < 0) |
2123 | { | |
2124 | if (c == -2) | |
2125 | break; | |
2126 | goto invalid_code; | |
2127 | } | |
ff0dacd7 KH |
2128 | if (last_id != id) |
2129 | { | |
2130 | if (last_id != charset_ascii) | |
69a80ea3 | 2131 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
ff0dacd7 KH |
2132 | last_id = id; |
2133 | last_offset = char_offset; | |
2134 | } | |
df7492f9 | 2135 | *charbuf++ = c; |
781d7a48 KH |
2136 | src += nbytes; |
2137 | consumed_chars += nchars; | |
df7492f9 KH |
2138 | char_offset++; |
2139 | } | |
4d41e8b7 KH |
2140 | else |
2141 | goto invalid_code; | |
df7492f9 KH |
2142 | continue; |
2143 | ||
2144 | invalid_code: | |
2145 | src = src_base; | |
2146 | consumed_chars = consumed_chars_base; | |
2147 | ONE_MORE_BYTE (c); | |
2148 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
ff0dacd7 | 2149 | char_offset++; |
df7492f9 KH |
2150 | coding->errors++; |
2151 | } | |
2152 | ||
2153 | no_more_source: | |
ff0dacd7 | 2154 | if (last_id != charset_ascii) |
69a80ea3 | 2155 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
df7492f9 KH |
2156 | coding->consumed_char += consumed_chars_base; |
2157 | coding->consumed = src_base - coding->source; | |
2158 | coding->charbuf_used = charbuf - coding->charbuf; | |
2159 | } | |
2160 | ||
2161 | ||
2162 | #define EMACS_MULE_LEADING_CODES(id, codes) \ | |
2163 | do { \ | |
2164 | if (id < 0xA0) \ | |
2165 | codes[0] = id, codes[1] = 0; \ | |
2166 | else if (id < 0xE0) \ | |
2167 | codes[0] = 0x9A, codes[1] = id; \ | |
2168 | else if (id < 0xF0) \ | |
2169 | codes[0] = 0x9B, codes[1] = id; \ | |
2170 | else if (id < 0xF5) \ | |
2171 | codes[0] = 0x9C, codes[1] = id; \ | |
2172 | else \ | |
2173 | codes[0] = 0x9D, codes[1] = id; \ | |
2174 | } while (0); | |
2175 | ||
aa72b389 | 2176 | |
df7492f9 KH |
2177 | static int |
2178 | encode_coding_emacs_mule (coding) | |
2179 | struct coding_system *coding; | |
2180 | { | |
2181 | int multibytep = coding->dst_multibyte; | |
2182 | int *charbuf = coding->charbuf; | |
2183 | int *charbuf_end = charbuf + coding->charbuf_used; | |
2184 | unsigned char *dst = coding->destination + coding->produced; | |
2185 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
2186 | int safe_room = 8; | |
df7492f9 | 2187 | int produced_chars = 0; |
24a73b0a | 2188 | Lisp_Object attrs, charset_list; |
df7492f9 | 2189 | int c; |
ff0dacd7 | 2190 | int preferred_charset_id = -1; |
df7492f9 | 2191 | |
24a73b0a | 2192 | CODING_GET_INFO (coding, attrs, charset_list); |
eccb6815 KH |
2193 | if (! EQ (charset_list, Vemacs_mule_charset_list)) |
2194 | { | |
2195 | CODING_ATTR_CHARSET_LIST (attrs) | |
2196 | = charset_list = Vemacs_mule_charset_list; | |
2197 | } | |
df7492f9 KH |
2198 | |
2199 | while (charbuf < charbuf_end) | |
2200 | { | |
2201 | ASSURE_DESTINATION (safe_room); | |
2202 | c = *charbuf++; | |
ff0dacd7 KH |
2203 | |
2204 | if (c < 0) | |
2205 | { | |
2206 | /* Handle an annotation. */ | |
2207 | switch (*charbuf) | |
2208 | { | |
2209 | case CODING_ANNOTATE_COMPOSITION_MASK: | |
2210 | /* Not yet implemented. */ | |
2211 | break; | |
2212 | case CODING_ANNOTATE_CHARSET_MASK: | |
2213 | preferred_charset_id = charbuf[3]; | |
2214 | if (preferred_charset_id >= 0 | |
2215 | && NILP (Fmemq (make_number (preferred_charset_id), | |
2216 | charset_list))) | |
2217 | preferred_charset_id = -1; | |
2218 | break; | |
2219 | default: | |
2220 | abort (); | |
2221 | } | |
2222 | charbuf += -c - 1; | |
2223 | continue; | |
2224 | } | |
2225 | ||
df7492f9 KH |
2226 | if (ASCII_CHAR_P (c)) |
2227 | EMIT_ONE_ASCII_BYTE (c); | |
16eafb5d KH |
2228 | else if (CHAR_BYTE8_P (c)) |
2229 | { | |
2230 | c = CHAR_TO_BYTE8 (c); | |
2231 | EMIT_ONE_BYTE (c); | |
2232 | } | |
df7492f9 | 2233 | else |
aa72b389 | 2234 | { |
df7492f9 KH |
2235 | struct charset *charset; |
2236 | unsigned code; | |
2237 | int dimension; | |
2238 | int emacs_mule_id; | |
2239 | unsigned char leading_codes[2]; | |
2240 | ||
ff0dacd7 KH |
2241 | if (preferred_charset_id >= 0) |
2242 | { | |
2243 | charset = CHARSET_FROM_ID (preferred_charset_id); | |
2244 | if (! CHAR_CHARSET_P (c, charset)) | |
2245 | charset = char_charset (c, charset_list, NULL); | |
2246 | } | |
2247 | else | |
2248 | charset = char_charset (c, charset_list, &code); | |
df7492f9 KH |
2249 | if (! charset) |
2250 | { | |
2251 | c = coding->default_char; | |
2252 | if (ASCII_CHAR_P (c)) | |
2253 | { | |
2254 | EMIT_ONE_ASCII_BYTE (c); | |
2255 | continue; | |
2256 | } | |
2257 | charset = char_charset (c, charset_list, &code); | |
2258 | } | |
2259 | dimension = CHARSET_DIMENSION (charset); | |
2260 | emacs_mule_id = CHARSET_EMACS_MULE_ID (charset); | |
2261 | EMACS_MULE_LEADING_CODES (emacs_mule_id, leading_codes); | |
2262 | EMIT_ONE_BYTE (leading_codes[0]); | |
2263 | if (leading_codes[1]) | |
2264 | EMIT_ONE_BYTE (leading_codes[1]); | |
2265 | if (dimension == 1) | |
1fa663f9 | 2266 | EMIT_ONE_BYTE (code | 0x80); |
aa72b389 | 2267 | else |
df7492f9 | 2268 | { |
1fa663f9 | 2269 | code |= 0x8080; |
df7492f9 KH |
2270 | EMIT_ONE_BYTE (code >> 8); |
2271 | EMIT_ONE_BYTE (code & 0xFF); | |
2272 | } | |
aa72b389 | 2273 | } |
aa72b389 | 2274 | } |
065e3595 | 2275 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
2276 | coding->produced_char += produced_chars; |
2277 | coding->produced = dst - coding->destination; | |
2278 | return 0; | |
aa72b389 | 2279 | } |
b73bfc1c | 2280 | |
4ed46869 | 2281 | \f |
df7492f9 | 2282 | /*** 7. ISO2022 handlers ***/ |
4ed46869 KH |
2283 | |
2284 | /* The following note describes the coding system ISO2022 briefly. | |
39787efd | 2285 | Since the intention of this note is to help understand the |
5a936b46 | 2286 | functions in this file, some parts are NOT ACCURATE or are OVERLY |
39787efd | 2287 | SIMPLIFIED. For thorough understanding, please refer to the |
5a936b46 | 2288 | original document of ISO2022. This is equivalent to the standard |
cfb43547 | 2289 | ECMA-35, obtainable from <URL:http://www.ecma.ch/> (*). |
4ed46869 KH |
2290 | |
2291 | ISO2022 provides many mechanisms to encode several character sets | |
cfb43547 | 2292 | in 7-bit and 8-bit environments. For 7-bit environments, all text |
39787efd KH |
2293 | is encoded using bytes less than 128. This may make the encoded |
2294 | text a little bit longer, but the text passes more easily through | |
cfb43547 | 2295 | several types of gateway, some of which strip off the MSB (Most |
8ca3766a | 2296 | Significant Bit). |
b73bfc1c | 2297 | |
cfb43547 DL |
2298 | There are two kinds of character sets: control character sets and |
2299 | graphic character sets. The former contain control characters such | |
4ed46869 | 2300 | as `newline' and `escape' to provide control functions (control |
39787efd | 2301 | functions are also provided by escape sequences). The latter |
cfb43547 | 2302 | contain graphic characters such as 'A' and '-'. Emacs recognizes |
4ed46869 KH |
2303 | two control character sets and many graphic character sets. |
2304 | ||
2305 | Graphic character sets are classified into one of the following | |
39787efd KH |
2306 | four classes, according to the number of bytes (DIMENSION) and |
2307 | number of characters in one dimension (CHARS) of the set: | |
2308 | - DIMENSION1_CHARS94 | |
2309 | - DIMENSION1_CHARS96 | |
2310 | - DIMENSION2_CHARS94 | |
2311 | - DIMENSION2_CHARS96 | |
2312 | ||
2313 | In addition, each character set is assigned an identification tag, | |
cfb43547 | 2314 | unique for each set, called the "final character" (denoted as <F> |
39787efd KH |
2315 | hereafter). The <F> of each character set is decided by ECMA(*) |
2316 | when it is registered in ISO. The code range of <F> is 0x30..0x7F | |
2317 | (0x30..0x3F are for private use only). | |
4ed46869 KH |
2318 | |
2319 | Note (*): ECMA = European Computer Manufacturers Association | |
2320 | ||
cfb43547 | 2321 | Here are examples of graphic character sets [NAME(<F>)]: |
4ed46869 KH |
2322 | o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ... |
2323 | o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ... | |
2324 | o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ... | |
2325 | o DIMENSION2_CHARS96 -- none for the moment | |
2326 | ||
39787efd | 2327 | A code area (1 byte=8 bits) is divided into 4 areas, C0, GL, C1, and GR. |
4ed46869 KH |
2328 | C0 [0x00..0x1F] -- control character plane 0 |
2329 | GL [0x20..0x7F] -- graphic character plane 0 | |
2330 | C1 [0x80..0x9F] -- control character plane 1 | |
2331 | GR [0xA0..0xFF] -- graphic character plane 1 | |
2332 | ||
2333 | A control character set is directly designated and invoked to C0 or | |
39787efd KH |
2334 | C1 by an escape sequence. The most common case is that: |
2335 | - ISO646's control character set is designated/invoked to C0, and | |
2336 | - ISO6429's control character set is designated/invoked to C1, | |
2337 | and usually these designations/invocations are omitted in encoded | |
2338 | text. In a 7-bit environment, only C0 can be used, and a control | |
2339 | character for C1 is encoded by an appropriate escape sequence to | |
2340 | fit into the environment. All control characters for C1 are | |
2341 | defined to have corresponding escape sequences. | |
4ed46869 KH |
2342 | |
2343 | A graphic character set is at first designated to one of four | |
2344 | graphic registers (G0 through G3), then these graphic registers are | |
2345 | invoked to GL or GR. These designations and invocations can be | |
2346 | done independently. The most common case is that G0 is invoked to | |
39787efd KH |
2347 | GL, G1 is invoked to GR, and ASCII is designated to G0. Usually |
2348 | these invocations and designations are omitted in encoded text. | |
2349 | In a 7-bit environment, only GL can be used. | |
4ed46869 | 2350 | |
39787efd KH |
2351 | When a graphic character set of CHARS94 is invoked to GL, codes |
2352 | 0x20 and 0x7F of the GL area work as control characters SPACE and | |
2353 | DEL respectively, and codes 0xA0 and 0xFF of the GR area should not | |
2354 | be used. | |
4ed46869 KH |
2355 | |
2356 | There are two ways of invocation: locking-shift and single-shift. | |
2357 | With locking-shift, the invocation lasts until the next different | |
39787efd KH |
2358 | invocation, whereas with single-shift, the invocation affects the |
2359 | following character only and doesn't affect the locking-shift | |
2360 | state. Invocations are done by the following control characters or | |
2361 | escape sequences: | |
4ed46869 KH |
2362 | |
2363 | ---------------------------------------------------------------------- | |
39787efd | 2364 | abbrev function cntrl escape seq description |
4ed46869 | 2365 | ---------------------------------------------------------------------- |
39787efd KH |
2366 | SI/LS0 (shift-in) 0x0F none invoke G0 into GL |
2367 | SO/LS1 (shift-out) 0x0E none invoke G1 into GL | |
2368 | LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL | |
2369 | LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL | |
2370 | LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*) | |
2371 | LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*) | |
2372 | LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*) | |
2373 | SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char | |
2374 | SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char | |
4ed46869 | 2375 | ---------------------------------------------------------------------- |
39787efd KH |
2376 | (*) These are not used by any known coding system. |
2377 | ||
2378 | Control characters for these functions are defined by macros | |
2379 | ISO_CODE_XXX in `coding.h'. | |
4ed46869 | 2380 | |
39787efd | 2381 | Designations are done by the following escape sequences: |
4ed46869 KH |
2382 | ---------------------------------------------------------------------- |
2383 | escape sequence description | |
2384 | ---------------------------------------------------------------------- | |
2385 | ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0 | |
2386 | ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1 | |
2387 | ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2 | |
2388 | ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3 | |
2389 | ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*) | |
2390 | ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1 | |
2391 | ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2 | |
2392 | ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3 | |
2393 | ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**) | |
2394 | ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1 | |
2395 | ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2 | |
2396 | ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3 | |
2397 | ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*) | |
2398 | ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1 | |
2399 | ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2 | |
2400 | ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3 | |
2401 | ---------------------------------------------------------------------- | |
2402 | ||
2403 | In this list, "DIMENSION1_CHARS94<F>" means a graphic character set | |
39787efd | 2404 | of dimension 1, chars 94, and final character <F>, etc... |
4ed46869 KH |
2405 | |
2406 | Note (*): Although these designations are not allowed in ISO2022, | |
2407 | Emacs accepts them on decoding, and produces them on encoding | |
39787efd | 2408 | CHARS96 character sets in a coding system which is characterized as |
4ed46869 KH |
2409 | 7-bit environment, non-locking-shift, and non-single-shift. |
2410 | ||
2411 | Note (**): If <F> is '@', 'A', or 'B', the intermediate character | |
df7492f9 | 2412 | '(' must be omitted. We refer to this as "short-form" hereafter. |
4ed46869 | 2413 | |
cfb43547 | 2414 | Now you may notice that there are a lot of ways of encoding the |
39787efd KH |
2415 | same multilingual text in ISO2022. Actually, there exist many |
2416 | coding systems such as Compound Text (used in X11's inter client | |
8ca3766a DL |
2417 | communication, ISO-2022-JP (used in Japanese Internet), ISO-2022-KR |
2418 | (used in Korean Internet), EUC (Extended UNIX Code, used in Asian | |
4ed46869 KH |
2419 | localized platforms), and all of these are variants of ISO2022. |
2420 | ||
2421 | In addition to the above, Emacs handles two more kinds of escape | |
2422 | sequences: ISO6429's direction specification and Emacs' private | |
2423 | sequence for specifying character composition. | |
2424 | ||
39787efd | 2425 | ISO6429's direction specification takes the following form: |
4ed46869 KH |
2426 | o CSI ']' -- end of the current direction |
2427 | o CSI '0' ']' -- end of the current direction | |
2428 | o CSI '1' ']' -- start of left-to-right text | |
2429 | o CSI '2' ']' -- start of right-to-left text | |
2430 | The control character CSI (0x9B: control sequence introducer) is | |
39787efd KH |
2431 | abbreviated to the escape sequence ESC '[' in a 7-bit environment. |
2432 | ||
2433 | Character composition specification takes the following form: | |
ec6d2bb8 KH |
2434 | o ESC '0' -- start relative composition |
2435 | o ESC '1' -- end composition | |
2436 | o ESC '2' -- start rule-base composition (*) | |
2437 | o ESC '3' -- start relative composition with alternate chars (**) | |
2438 | o ESC '4' -- start rule-base composition with alternate chars (**) | |
b73bfc1c | 2439 | Since these are not standard escape sequences of any ISO standard, |
cfb43547 | 2440 | the use of them with these meanings is restricted to Emacs only. |
ec6d2bb8 | 2441 | |
5a936b46 DL |
2442 | (*) This form is used only in Emacs 20.7 and older versions, |
2443 | but newer versions can safely decode it. | |
cfb43547 | 2444 | (**) This form is used only in Emacs 21.1 and newer versions, |
5a936b46 | 2445 | and older versions can't decode it. |
ec6d2bb8 | 2446 | |
cfb43547 | 2447 | Here's a list of example usages of these composition escape |
b73bfc1c | 2448 | sequences (categorized by `enum composition_method'). |
ec6d2bb8 | 2449 | |
b73bfc1c | 2450 | COMPOSITION_RELATIVE: |
ec6d2bb8 | 2451 | ESC 0 CHAR [ CHAR ] ESC 1 |
8ca3766a | 2452 | COMPOSITION_WITH_RULE: |
ec6d2bb8 | 2453 | ESC 2 CHAR [ RULE CHAR ] ESC 1 |
b73bfc1c | 2454 | COMPOSITION_WITH_ALTCHARS: |
ec6d2bb8 | 2455 | ESC 3 ALTCHAR [ ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 |
b73bfc1c | 2456 | COMPOSITION_WITH_RULE_ALTCHARS: |
ec6d2bb8 | 2457 | ESC 4 ALTCHAR [ RULE ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 */ |
4ed46869 KH |
2458 | |
2459 | enum iso_code_class_type iso_code_class[256]; | |
2460 | ||
df7492f9 KH |
2461 | #define SAFE_CHARSET_P(coding, id) \ |
2462 | ((id) <= (coding)->max_charset_id \ | |
2463 | && (coding)->safe_charsets[id] >= 0) | |
2464 | ||
2465 | ||
2466 | #define SHIFT_OUT_OK(category) \ | |
2467 | (CODING_ISO_INITIAL (&coding_categories[category], 1) >= 0) | |
2468 | ||
2469 | static void | |
f0064e1f DL |
2470 | setup_iso_safe_charsets (attrs) |
2471 | Lisp_Object attrs; | |
df7492f9 KH |
2472 | { |
2473 | Lisp_Object charset_list, safe_charsets; | |
2474 | Lisp_Object request; | |
2475 | Lisp_Object reg_usage; | |
2476 | Lisp_Object tail; | |
2477 | int reg94, reg96; | |
2478 | int flags = XINT (AREF (attrs, coding_attr_iso_flags)); | |
2479 | int max_charset_id; | |
2480 | ||
2481 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
2482 | if ((flags & CODING_ISO_FLAG_FULL_SUPPORT) | |
2483 | && ! EQ (charset_list, Viso_2022_charset_list)) | |
2484 | { | |
2485 | CODING_ATTR_CHARSET_LIST (attrs) | |
2486 | = charset_list = Viso_2022_charset_list; | |
2487 | ASET (attrs, coding_attr_safe_charsets, Qnil); | |
2488 | } | |
2489 | ||
2490 | if (STRINGP (AREF (attrs, coding_attr_safe_charsets))) | |
2491 | return; | |
2492 | ||
2493 | max_charset_id = 0; | |
2494 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
2495 | { | |
2496 | int id = XINT (XCAR (tail)); | |
2497 | if (max_charset_id < id) | |
2498 | max_charset_id = id; | |
2499 | } | |
d46c5b12 | 2500 | |
df7492f9 KH |
2501 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), |
2502 | make_number (255)); | |
2503 | request = AREF (attrs, coding_attr_iso_request); | |
2504 | reg_usage = AREF (attrs, coding_attr_iso_usage); | |
2505 | reg94 = XINT (XCAR (reg_usage)); | |
2506 | reg96 = XINT (XCDR (reg_usage)); | |
2507 | ||
2508 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
2509 | { | |
2510 | Lisp_Object id; | |
2511 | Lisp_Object reg; | |
2512 | struct charset *charset; | |
2513 | ||
2514 | id = XCAR (tail); | |
2515 | charset = CHARSET_FROM_ID (XINT (id)); | |
bf16eb23 | 2516 | reg = Fcdr (Fassq (id, request)); |
df7492f9 | 2517 | if (! NILP (reg)) |
8f924df7 | 2518 | SSET (safe_charsets, XINT (id), XINT (reg)); |
df7492f9 KH |
2519 | else if (charset->iso_chars_96) |
2520 | { | |
2521 | if (reg96 < 4) | |
8f924df7 | 2522 | SSET (safe_charsets, XINT (id), reg96); |
df7492f9 KH |
2523 | } |
2524 | else | |
2525 | { | |
2526 | if (reg94 < 4) | |
8f924df7 | 2527 | SSET (safe_charsets, XINT (id), reg94); |
df7492f9 KH |
2528 | } |
2529 | } | |
2530 | ASET (attrs, coding_attr_safe_charsets, safe_charsets); | |
2531 | } | |
d46c5b12 | 2532 | |
b6871cc7 | 2533 | |
4ed46869 | 2534 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
ff0dacd7 KH |
2535 | Check if a text is encoded in one of ISO-2022 based codig systems. |
2536 | If it is, return 1, else return 0. */ | |
4ed46869 | 2537 | |
0a28aafb | 2538 | static int |
ff0dacd7 | 2539 | detect_coding_iso_2022 (coding, detect_info) |
df7492f9 | 2540 | struct coding_system *coding; |
ff0dacd7 | 2541 | struct coding_detection_info *detect_info; |
4ed46869 | 2542 | { |
8f924df7 KH |
2543 | const unsigned char *src = coding->source, *src_base = src; |
2544 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
df7492f9 | 2545 | int multibytep = coding->src_multibyte; |
ff0dacd7 | 2546 | int single_shifting = 0; |
df7492f9 KH |
2547 | int id; |
2548 | int c, c1; | |
2549 | int consumed_chars = 0; | |
2550 | int i; | |
ff0dacd7 KH |
2551 | int rejected = 0; |
2552 | int found = 0; | |
2553 | ||
2554 | detect_info->checked |= CATEGORY_MASK_ISO; | |
df7492f9 KH |
2555 | |
2556 | for (i = coding_category_iso_7; i <= coding_category_iso_8_else; i++) | |
2557 | { | |
2558 | struct coding_system *this = &(coding_categories[i]); | |
2559 | Lisp_Object attrs, val; | |
2560 | ||
2561 | attrs = CODING_ID_ATTRS (this->id); | |
2562 | if (CODING_ISO_FLAGS (this) & CODING_ISO_FLAG_FULL_SUPPORT | |
2563 | && ! EQ (CODING_ATTR_SAFE_CHARSETS (attrs), Viso_2022_charset_list)) | |
2564 | setup_iso_safe_charsets (attrs); | |
2565 | val = CODING_ATTR_SAFE_CHARSETS (attrs); | |
8f924df7 KH |
2566 | this->max_charset_id = SCHARS (val) - 1; |
2567 | this->safe_charsets = (char *) SDATA (val); | |
df7492f9 KH |
2568 | } |
2569 | ||
2570 | /* A coding system of this category is always ASCII compatible. */ | |
2571 | src += coding->head_ascii; | |
3f003981 | 2572 | |
ff0dacd7 | 2573 | while (rejected != CATEGORY_MASK_ISO) |
4ed46869 | 2574 | { |
065e3595 | 2575 | src_base = src; |
df7492f9 | 2576 | ONE_MORE_BYTE (c); |
4ed46869 KH |
2577 | switch (c) |
2578 | { | |
2579 | case ISO_CODE_ESC: | |
74383408 KH |
2580 | if (inhibit_iso_escape_detection) |
2581 | break; | |
f46869e4 | 2582 | single_shifting = 0; |
df7492f9 | 2583 | ONE_MORE_BYTE (c); |
d46c5b12 | 2584 | if (c >= '(' && c <= '/') |
4ed46869 | 2585 | { |
bf9cdd4e | 2586 | /* Designation sequence for a charset of dimension 1. */ |
df7492f9 | 2587 | ONE_MORE_BYTE (c1); |
d46c5b12 | 2588 | if (c1 < ' ' || c1 >= 0x80 |
df7492f9 | 2589 | || (id = iso_charset_table[0][c >= ','][c1]) < 0) |
d46c5b12 KH |
2590 | /* Invalid designation sequence. Just ignore. */ |
2591 | break; | |
bf9cdd4e KH |
2592 | } |
2593 | else if (c == '$') | |
2594 | { | |
2595 | /* Designation sequence for a charset of dimension 2. */ | |
df7492f9 | 2596 | ONE_MORE_BYTE (c); |
bf9cdd4e KH |
2597 | if (c >= '@' && c <= 'B') |
2598 | /* Designation for JISX0208.1978, GB2312, or JISX0208. */ | |
ff0dacd7 | 2599 | id = iso_charset_table[1][0][c]; |
bf9cdd4e | 2600 | else if (c >= '(' && c <= '/') |
bcf26d6a | 2601 | { |
df7492f9 | 2602 | ONE_MORE_BYTE (c1); |
d46c5b12 | 2603 | if (c1 < ' ' || c1 >= 0x80 |
df7492f9 | 2604 | || (id = iso_charset_table[1][c >= ','][c1]) < 0) |
d46c5b12 KH |
2605 | /* Invalid designation sequence. Just ignore. */ |
2606 | break; | |
bcf26d6a | 2607 | } |
bf9cdd4e | 2608 | else |
ff0dacd7 | 2609 | /* Invalid designation sequence. Just ignore it. */ |
d46c5b12 KH |
2610 | break; |
2611 | } | |
ae9ff118 | 2612 | else if (c == 'N' || c == 'O') |
d46c5b12 | 2613 | { |
ae9ff118 | 2614 | /* ESC <Fe> for SS2 or SS3. */ |
ff0dacd7 KH |
2615 | single_shifting = 1; |
2616 | rejected |= CATEGORY_MASK_ISO_7BIT | CATEGORY_MASK_ISO_8BIT; | |
d46c5b12 | 2617 | break; |
4ed46869 | 2618 | } |
ec6d2bb8 KH |
2619 | else if (c >= '0' && c <= '4') |
2620 | { | |
2621 | /* ESC <Fp> for start/end composition. */ | |
ff0dacd7 | 2622 | found |= CATEGORY_MASK_ISO; |
ec6d2bb8 KH |
2623 | break; |
2624 | } | |
bf9cdd4e | 2625 | else |
df7492f9 | 2626 | { |
ff0dacd7 | 2627 | /* Invalid escape sequence. Just ignore it. */ |
df7492f9 KH |
2628 | break; |
2629 | } | |
d46c5b12 KH |
2630 | |
2631 | /* We found a valid designation sequence for CHARSET. */ | |
ff0dacd7 | 2632 | rejected |= CATEGORY_MASK_ISO_8BIT; |
df7492f9 KH |
2633 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7], |
2634 | id)) | |
ff0dacd7 | 2635 | found |= CATEGORY_MASK_ISO_7; |
d46c5b12 | 2636 | else |
ff0dacd7 | 2637 | rejected |= CATEGORY_MASK_ISO_7; |
df7492f9 KH |
2638 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7_tight], |
2639 | id)) | |
ff0dacd7 | 2640 | found |= CATEGORY_MASK_ISO_7_TIGHT; |
d46c5b12 | 2641 | else |
ff0dacd7 | 2642 | rejected |= CATEGORY_MASK_ISO_7_TIGHT; |
df7492f9 KH |
2643 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7_else], |
2644 | id)) | |
ff0dacd7 | 2645 | found |= CATEGORY_MASK_ISO_7_ELSE; |
ae9ff118 | 2646 | else |
ff0dacd7 | 2647 | rejected |= CATEGORY_MASK_ISO_7_ELSE; |
df7492f9 KH |
2648 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_8_else], |
2649 | id)) | |
ff0dacd7 | 2650 | found |= CATEGORY_MASK_ISO_8_ELSE; |
ae9ff118 | 2651 | else |
ff0dacd7 | 2652 | rejected |= CATEGORY_MASK_ISO_8_ELSE; |
4ed46869 KH |
2653 | break; |
2654 | ||
4ed46869 | 2655 | case ISO_CODE_SO: |
d46c5b12 | 2656 | case ISO_CODE_SI: |
ff0dacd7 | 2657 | /* Locking shift out/in. */ |
74383408 KH |
2658 | if (inhibit_iso_escape_detection) |
2659 | break; | |
f46869e4 | 2660 | single_shifting = 0; |
ff0dacd7 | 2661 | rejected |= CATEGORY_MASK_ISO_7BIT | CATEGORY_MASK_ISO_8BIT; |
d46c5b12 KH |
2662 | break; |
2663 | ||
4ed46869 | 2664 | case ISO_CODE_CSI: |
ff0dacd7 | 2665 | /* Control sequence introducer. */ |
f46869e4 | 2666 | single_shifting = 0; |
ff0dacd7 KH |
2667 | rejected |= CATEGORY_MASK_ISO_7BIT | CATEGORY_MASK_ISO_7_ELSE; |
2668 | found |= CATEGORY_MASK_ISO_8_ELSE; | |
2669 | goto check_extra_latin; | |
2670 | ||
4ed46869 KH |
2671 | case ISO_CODE_SS2: |
2672 | case ISO_CODE_SS3: | |
ff0dacd7 KH |
2673 | /* Single shift. */ |
2674 | if (inhibit_iso_escape_detection) | |
2675 | break; | |
75e2a253 | 2676 | single_shifting = 0; |
ff0dacd7 KH |
2677 | rejected |= CATEGORY_MASK_ISO_7BIT; |
2678 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_1]) | |
2679 | & CODING_ISO_FLAG_SINGLE_SHIFT) | |
75e2a253 | 2680 | found |= CATEGORY_MASK_ISO_8_1, single_shifting = 1; |
ff0dacd7 KH |
2681 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_2]) |
2682 | & CODING_ISO_FLAG_SINGLE_SHIFT) | |
75e2a253 KH |
2683 | found |= CATEGORY_MASK_ISO_8_2, single_shifting = 1; |
2684 | if (single_shifting) | |
2685 | break; | |
ff0dacd7 | 2686 | goto check_extra_latin; |
4ed46869 KH |
2687 | |
2688 | default: | |
065e3595 KH |
2689 | if (c < 0) |
2690 | continue; | |
4ed46869 | 2691 | if (c < 0x80) |
f46869e4 KH |
2692 | { |
2693 | single_shifting = 0; | |
2694 | break; | |
2695 | } | |
ff0dacd7 | 2696 | if (c >= 0xA0) |
c4825358 | 2697 | { |
ff0dacd7 KH |
2698 | rejected |= CATEGORY_MASK_ISO_7BIT | CATEGORY_MASK_ISO_7_ELSE; |
2699 | found |= CATEGORY_MASK_ISO_8_1; | |
f46869e4 | 2700 | /* Check the length of succeeding codes of the range |
ff0dacd7 KH |
2701 | 0xA0..0FF. If the byte length is even, we include |
2702 | CATEGORY_MASK_ISO_8_2 in `found'. We can check this | |
2703 | only when we are not single shifting. */ | |
2704 | if (! single_shifting | |
2705 | && ! (rejected & CATEGORY_MASK_ISO_8_2)) | |
f46869e4 | 2706 | { |
e17de821 | 2707 | int i = 1; |
b73bfc1c KH |
2708 | while (src < src_end) |
2709 | { | |
df7492f9 | 2710 | ONE_MORE_BYTE (c); |
b73bfc1c KH |
2711 | if (c < 0xA0) |
2712 | break; | |
2713 | i++; | |
2714 | } | |
2715 | ||
2716 | if (i & 1 && src < src_end) | |
ff0dacd7 | 2717 | rejected |= CATEGORY_MASK_ISO_8_2; |
f46869e4 | 2718 | else |
ff0dacd7 | 2719 | found |= CATEGORY_MASK_ISO_8_2; |
f46869e4 | 2720 | } |
ff0dacd7 | 2721 | break; |
4ed46869 | 2722 | } |
ff0dacd7 KH |
2723 | check_extra_latin: |
2724 | single_shifting = 0; | |
2725 | if (! VECTORP (Vlatin_extra_code_table) | |
2726 | || NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
2727 | { | |
2728 | rejected = CATEGORY_MASK_ISO; | |
2729 | break; | |
2730 | } | |
2731 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_1]) | |
2732 | & CODING_ISO_FLAG_LATIN_EXTRA) | |
2733 | found |= CATEGORY_MASK_ISO_8_1; | |
2734 | else | |
2735 | rejected |= CATEGORY_MASK_ISO_8_1; | |
75e2a253 | 2736 | rejected |= CATEGORY_MASK_ISO_8_2; |
4ed46869 KH |
2737 | } |
2738 | } | |
ff0dacd7 KH |
2739 | detect_info->rejected |= CATEGORY_MASK_ISO; |
2740 | return 0; | |
4ed46869 | 2741 | |
df7492f9 | 2742 | no_more_source: |
ff0dacd7 KH |
2743 | detect_info->rejected |= rejected; |
2744 | detect_info->found |= (found & ~rejected); | |
df7492f9 | 2745 | return 1; |
4ed46869 | 2746 | } |
ec6d2bb8 | 2747 | |
4ed46869 | 2748 | |
134b9549 KH |
2749 | /* Set designation state into CODING. Set CHARS_96 to -1 if the |
2750 | escape sequence should be kept. */ | |
df7492f9 KH |
2751 | #define DECODE_DESIGNATION(reg, dim, chars_96, final) \ |
2752 | do { \ | |
2753 | int id, prev; \ | |
2754 | \ | |
2755 | if (final < '0' || final >= 128 \ | |
2756 | || ((id = ISO_CHARSET_TABLE (dim, chars_96, final)) < 0) \ | |
2757 | || !SAFE_CHARSET_P (coding, id)) \ | |
2758 | { \ | |
2759 | CODING_ISO_DESIGNATION (coding, reg) = -2; \ | |
134b9549 KH |
2760 | chars_96 = -1; \ |
2761 | break; \ | |
df7492f9 KH |
2762 | } \ |
2763 | prev = CODING_ISO_DESIGNATION (coding, reg); \ | |
bf16eb23 KH |
2764 | if (id == charset_jisx0201_roman) \ |
2765 | { \ | |
2766 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_ROMAN) \ | |
2767 | id = charset_ascii; \ | |
2768 | } \ | |
2769 | else if (id == charset_jisx0208_1978) \ | |
2770 | { \ | |
2771 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_OLDJIS) \ | |
2772 | id = charset_jisx0208; \ | |
2773 | } \ | |
df7492f9 KH |
2774 | CODING_ISO_DESIGNATION (coding, reg) = id; \ |
2775 | /* If there was an invalid designation to REG previously, and this \ | |
2776 | designation is ASCII to REG, we should keep this designation \ | |
2777 | sequence. */ \ | |
2778 | if (prev == -2 && id == charset_ascii) \ | |
134b9549 | 2779 | chars_96 = -1; \ |
4ed46869 KH |
2780 | } while (0) |
2781 | ||
d46c5b12 | 2782 | |
df7492f9 KH |
2783 | #define MAYBE_FINISH_COMPOSITION() \ |
2784 | do { \ | |
2785 | int i; \ | |
2786 | if (composition_state == COMPOSING_NO) \ | |
2787 | break; \ | |
2788 | /* It is assured that we have enough room for producing \ | |
2789 | characters stored in the table `components'. */ \ | |
2790 | if (charbuf + component_idx > charbuf_end) \ | |
2791 | goto no_more_source; \ | |
2792 | composition_state = COMPOSING_NO; \ | |
2793 | if (method == COMPOSITION_RELATIVE \ | |
2794 | || method == COMPOSITION_WITH_ALTCHARS) \ | |
2795 | { \ | |
2796 | for (i = 0; i < component_idx; i++) \ | |
2797 | *charbuf++ = components[i]; \ | |
2798 | char_offset += component_idx; \ | |
2799 | } \ | |
2800 | else \ | |
2801 | { \ | |
2802 | for (i = 0; i < component_idx; i += 2) \ | |
2803 | *charbuf++ = components[i]; \ | |
2804 | char_offset += (component_idx / 2) + 1; \ | |
2805 | } \ | |
2806 | } while (0) | |
2807 | ||
d46c5b12 | 2808 | |
aa72b389 KH |
2809 | /* Handle composition start sequence ESC 0, ESC 2, ESC 3, or ESC 4. |
2810 | ESC 0 : relative composition : ESC 0 CHAR ... ESC 1 | |
2811 | ESC 2 : rulebase composition : ESC 2 CHAR RULE CHAR RULE ... CHAR ESC 1 | |
df7492f9 KH |
2812 | ESC 3 : altchar composition : ESC 3 CHAR ... ESC 0 CHAR ... ESC 1 |
2813 | ESC 4 : alt&rule composition : ESC 4 CHAR RULE ... CHAR ESC 0 CHAR ... ESC 1 | |
aa72b389 | 2814 | */ |
ec6d2bb8 | 2815 | |
df7492f9 KH |
2816 | #define DECODE_COMPOSITION_START(c1) \ |
2817 | do { \ | |
2818 | if (c1 == '0' \ | |
781d7a48 | 2819 | && composition_state == COMPOSING_COMPONENT_RULE) \ |
df7492f9 KH |
2820 | { \ |
2821 | component_len = component_idx; \ | |
2822 | composition_state = COMPOSING_CHAR; \ | |
2823 | } \ | |
2824 | else \ | |
2825 | { \ | |
8f924df7 | 2826 | const unsigned char *p; \ |
df7492f9 KH |
2827 | \ |
2828 | MAYBE_FINISH_COMPOSITION (); \ | |
2829 | if (charbuf + MAX_COMPOSITION_COMPONENTS > charbuf_end) \ | |
2830 | goto no_more_source; \ | |
2831 | for (p = src; p < src_end - 1; p++) \ | |
2832 | if (*p == ISO_CODE_ESC && p[1] == '1') \ | |
2833 | break; \ | |
2834 | if (p == src_end - 1) \ | |
2835 | { \ | |
9286b333 KH |
2836 | /* The current composition doesn't end in the current \ |
2837 | source. */ \ | |
2838 | record_conversion_result \ | |
2839 | (coding, CODING_RESULT_INSUFFICIENT_SRC); \ | |
df7492f9 KH |
2840 | goto no_more_source; \ |
2841 | } \ | |
2842 | \ | |
2843 | /* This is surely the start of a composition. */ \ | |
2844 | method = (c1 == '0' ? COMPOSITION_RELATIVE \ | |
2845 | : c1 == '2' ? COMPOSITION_WITH_RULE \ | |
2846 | : c1 == '3' ? COMPOSITION_WITH_ALTCHARS \ | |
2847 | : COMPOSITION_WITH_RULE_ALTCHARS); \ | |
2848 | composition_state = (c1 <= '2' ? COMPOSING_CHAR \ | |
2849 | : COMPOSING_COMPONENT_CHAR); \ | |
2850 | component_idx = component_len = 0; \ | |
2851 | } \ | |
ec6d2bb8 KH |
2852 | } while (0) |
2853 | ||
ec6d2bb8 | 2854 | |
df7492f9 KH |
2855 | /* Handle compositoin end sequence ESC 1. */ |
2856 | ||
2857 | #define DECODE_COMPOSITION_END() \ | |
ec6d2bb8 | 2858 | do { \ |
df7492f9 KH |
2859 | int nchars = (component_len > 0 ? component_idx - component_len \ |
2860 | : method == COMPOSITION_RELATIVE ? component_idx \ | |
2861 | : (component_idx + 1) / 2); \ | |
2862 | int i; \ | |
2863 | int *saved_charbuf = charbuf; \ | |
2864 | \ | |
69a80ea3 | 2865 | ADD_COMPOSITION_DATA (charbuf, nchars, method); \ |
df7492f9 | 2866 | if (method != COMPOSITION_RELATIVE) \ |
ec6d2bb8 | 2867 | { \ |
df7492f9 KH |
2868 | if (component_len == 0) \ |
2869 | for (i = 0; i < component_idx; i++) \ | |
2870 | *charbuf++ = components[i]; \ | |
2871 | else \ | |
2872 | for (i = 0; i < component_len; i++) \ | |
2873 | *charbuf++ = components[i]; \ | |
2874 | *saved_charbuf = saved_charbuf - charbuf; \ | |
ec6d2bb8 | 2875 | } \ |
df7492f9 KH |
2876 | if (method == COMPOSITION_WITH_RULE) \ |
2877 | for (i = 0; i < component_idx; i += 2, char_offset++) \ | |
2878 | *charbuf++ = components[i]; \ | |
ec6d2bb8 | 2879 | else \ |
df7492f9 KH |
2880 | for (i = component_len; i < component_idx; i++, char_offset++) \ |
2881 | *charbuf++ = components[i]; \ | |
2882 | coding->annotated = 1; \ | |
2883 | composition_state = COMPOSING_NO; \ | |
ec6d2bb8 KH |
2884 | } while (0) |
2885 | ||
df7492f9 | 2886 | |
ec6d2bb8 KH |
2887 | /* Decode a composition rule from the byte C1 (and maybe one more byte |
2888 | from SRC) and store one encoded composition rule in | |
2889 | coding->cmp_data. */ | |
2890 | ||
2891 | #define DECODE_COMPOSITION_RULE(c1) \ | |
2892 | do { \ | |
ec6d2bb8 KH |
2893 | (c1) -= 32; \ |
2894 | if (c1 < 81) /* old format (before ver.21) */ \ | |
2895 | { \ | |
2896 | int gref = (c1) / 9; \ | |
2897 | int nref = (c1) % 9; \ | |
2898 | if (gref == 4) gref = 10; \ | |
2899 | if (nref == 4) nref = 10; \ | |
df7492f9 | 2900 | c1 = COMPOSITION_ENCODE_RULE (gref, nref); \ |
ec6d2bb8 | 2901 | } \ |
b73bfc1c | 2902 | else if (c1 < 93) /* new format (after ver.21) */ \ |
ec6d2bb8 KH |
2903 | { \ |
2904 | ONE_MORE_BYTE (c2); \ | |
df7492f9 | 2905 | c1 = COMPOSITION_ENCODE_RULE (c1 - 81, c2 - 32); \ |
ec6d2bb8 | 2906 | } \ |
df7492f9 KH |
2907 | else \ |
2908 | c1 = 0; \ | |
ec6d2bb8 | 2909 | } while (0) |
88993dfd | 2910 | |
d46c5b12 | 2911 | |
4ed46869 KH |
2912 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
2913 | ||
b73bfc1c | 2914 | static void |
df7492f9 | 2915 | decode_coding_iso_2022 (coding) |
4ed46869 | 2916 | struct coding_system *coding; |
4ed46869 | 2917 | { |
8f924df7 KH |
2918 | const unsigned char *src = coding->source + coding->consumed; |
2919 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
2920 | const unsigned char *src_base; | |
69a80ea3 | 2921 | int *charbuf = coding->charbuf + coding->charbuf_used; |
ff0dacd7 | 2922 | int *charbuf_end |
69a80ea3 | 2923 | = coding->charbuf + coding->charbuf_size - 4 - MAX_ANNOTATION_LENGTH; |
df7492f9 | 2924 | int consumed_chars = 0, consumed_chars_base; |
df7492f9 | 2925 | int multibytep = coding->src_multibyte; |
4ed46869 | 2926 | /* Charsets invoked to graphic plane 0 and 1 respectively. */ |
df7492f9 KH |
2927 | int charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); |
2928 | int charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
134b9549 | 2929 | int charset_id_2, charset_id_3; |
df7492f9 KH |
2930 | struct charset *charset; |
2931 | int c; | |
2932 | /* For handling composition sequence. */ | |
2933 | #define COMPOSING_NO 0 | |
2934 | #define COMPOSING_CHAR 1 | |
2935 | #define COMPOSING_RULE 2 | |
2936 | #define COMPOSING_COMPONENT_CHAR 3 | |
2937 | #define COMPOSING_COMPONENT_RULE 4 | |
2938 | ||
2939 | int composition_state = COMPOSING_NO; | |
2940 | enum composition_method method; | |
2941 | int components[MAX_COMPOSITION_COMPONENTS * 2 + 1]; | |
2942 | int component_idx; | |
2943 | int component_len; | |
24a73b0a | 2944 | Lisp_Object attrs, charset_list; |
ff0dacd7 KH |
2945 | int char_offset = coding->produced_char; |
2946 | int last_offset = char_offset; | |
2947 | int last_id = charset_ascii; | |
df7492f9 | 2948 | |
24a73b0a | 2949 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 | 2950 | setup_iso_safe_charsets (attrs); |
287c57d7 KH |
2951 | /* Charset list may have been changed. */ |
2952 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
2953 | coding->safe_charsets = (char *) SDATA (CODING_ATTR_SAFE_CHARSETS(attrs)); | |
b73bfc1c KH |
2954 | |
2955 | while (1) | |
4ed46869 | 2956 | { |
463f5630 | 2957 | int c1, c2; |
b73bfc1c KH |
2958 | |
2959 | src_base = src; | |
df7492f9 KH |
2960 | consumed_chars_base = consumed_chars; |
2961 | ||
2962 | if (charbuf >= charbuf_end) | |
2963 | break; | |
2964 | ||
b73bfc1c | 2965 | ONE_MORE_BYTE (c1); |
065e3595 KH |
2966 | if (c1 < 0) |
2967 | goto invalid_code; | |
4ed46869 | 2968 | |
98725083 | 2969 | /* We produce at most one character. */ |
4ed46869 KH |
2970 | switch (iso_code_class [c1]) |
2971 | { | |
2972 | case ISO_0x20_or_0x7F: | |
df7492f9 | 2973 | if (composition_state != COMPOSING_NO) |
ec6d2bb8 | 2974 | { |
df7492f9 KH |
2975 | if (composition_state == COMPOSING_RULE |
2976 | || composition_state == COMPOSING_COMPONENT_RULE) | |
2977 | { | |
2978 | DECODE_COMPOSITION_RULE (c1); | |
2979 | components[component_idx++] = c1; | |
2980 | composition_state--; | |
2981 | continue; | |
2982 | } | |
4ed46869 | 2983 | } |
df7492f9 KH |
2984 | if (charset_id_0 < 0 |
2985 | || ! CHARSET_ISO_CHARS_96 (CHARSET_FROM_ID (charset_id_0))) | |
781d7a48 KH |
2986 | /* This is SPACE or DEL. */ |
2987 | charset = CHARSET_FROM_ID (charset_ascii); | |
2988 | else | |
2989 | charset = CHARSET_FROM_ID (charset_id_0); | |
2990 | break; | |
4ed46869 KH |
2991 | |
2992 | case ISO_graphic_plane_0: | |
781d7a48 | 2993 | if (composition_state != COMPOSING_NO) |
b73bfc1c | 2994 | { |
781d7a48 KH |
2995 | if (composition_state == COMPOSING_RULE |
2996 | || composition_state == COMPOSING_COMPONENT_RULE) | |
2997 | { | |
2998 | DECODE_COMPOSITION_RULE (c1); | |
2999 | components[component_idx++] = c1; | |
3000 | composition_state--; | |
3001 | continue; | |
3002 | } | |
b73bfc1c | 3003 | } |
134b9549 KH |
3004 | if (charset_id_0 < 0) |
3005 | charset = CHARSET_FROM_ID (charset_ascii); | |
3006 | else | |
3007 | charset = CHARSET_FROM_ID (charset_id_0); | |
4ed46869 KH |
3008 | break; |
3009 | ||
3010 | case ISO_0xA0_or_0xFF: | |
df7492f9 KH |
3011 | if (charset_id_1 < 0 |
3012 | || ! CHARSET_ISO_CHARS_96 (CHARSET_FROM_ID (charset_id_1)) | |
3013 | || CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) | |
3014 | goto invalid_code; | |
4ed46869 KH |
3015 | /* This is a graphic character, we fall down ... */ |
3016 | ||
3017 | case ISO_graphic_plane_1: | |
df7492f9 KH |
3018 | if (charset_id_1 < 0) |
3019 | goto invalid_code; | |
3020 | charset = CHARSET_FROM_ID (charset_id_1); | |
4ed46869 KH |
3021 | break; |
3022 | ||
df7492f9 KH |
3023 | case ISO_control_0: |
3024 | MAYBE_FINISH_COMPOSITION (); | |
3025 | charset = CHARSET_FROM_ID (charset_ascii); | |
4ed46869 KH |
3026 | break; |
3027 | ||
df7492f9 KH |
3028 | case ISO_control_1: |
3029 | MAYBE_FINISH_COMPOSITION (); | |
3030 | goto invalid_code; | |
3031 | ||
4ed46869 | 3032 | case ISO_shift_out: |
df7492f9 KH |
3033 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
3034 | || CODING_ISO_DESIGNATION (coding, 1) < 0) | |
3035 | goto invalid_code; | |
3036 | CODING_ISO_INVOCATION (coding, 0) = 1; | |
3037 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 3038 | continue; |
4ed46869 KH |
3039 | |
3040 | case ISO_shift_in: | |
df7492f9 KH |
3041 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT)) |
3042 | goto invalid_code; | |
3043 | CODING_ISO_INVOCATION (coding, 0) = 0; | |
3044 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 3045 | continue; |
4ed46869 KH |
3046 | |
3047 | case ISO_single_shift_2_7: | |
3048 | case ISO_single_shift_2: | |
df7492f9 KH |
3049 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT)) |
3050 | goto invalid_code; | |
4ed46869 KH |
3051 | /* SS2 is handled as an escape sequence of ESC 'N' */ |
3052 | c1 = 'N'; | |
3053 | goto label_escape_sequence; | |
3054 | ||
3055 | case ISO_single_shift_3: | |
df7492f9 KH |
3056 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT)) |
3057 | goto invalid_code; | |
4ed46869 KH |
3058 | /* SS2 is handled as an escape sequence of ESC 'O' */ |
3059 | c1 = 'O'; | |
3060 | goto label_escape_sequence; | |
3061 | ||
3062 | case ISO_control_sequence_introducer: | |
3063 | /* CSI is handled as an escape sequence of ESC '[' ... */ | |
3064 | c1 = '['; | |
3065 | goto label_escape_sequence; | |
3066 | ||
3067 | case ISO_escape: | |
3068 | ONE_MORE_BYTE (c1); | |
3069 | label_escape_sequence: | |
df7492f9 | 3070 | /* Escape sequences handled here are invocation, |
4ed46869 KH |
3071 | designation, direction specification, and character |
3072 | composition specification. */ | |
3073 | switch (c1) | |
3074 | { | |
3075 | case '&': /* revision of following character set */ | |
3076 | ONE_MORE_BYTE (c1); | |
3077 | if (!(c1 >= '@' && c1 <= '~')) | |
df7492f9 | 3078 | goto invalid_code; |
4ed46869 KH |
3079 | ONE_MORE_BYTE (c1); |
3080 | if (c1 != ISO_CODE_ESC) | |
df7492f9 | 3081 | goto invalid_code; |
4ed46869 KH |
3082 | ONE_MORE_BYTE (c1); |
3083 | goto label_escape_sequence; | |
3084 | ||
3085 | case '$': /* designation of 2-byte character set */ | |
df7492f9 KH |
3086 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATION)) |
3087 | goto invalid_code; | |
134b9549 KH |
3088 | { |
3089 | int reg, chars96; | |
3090 | ||
3091 | ONE_MORE_BYTE (c1); | |
3092 | if (c1 >= '@' && c1 <= 'B') | |
3093 | { /* designation of JISX0208.1978, GB2312.1980, | |
88993dfd | 3094 | or JISX0208.1980 */ |
134b9549 KH |
3095 | reg = 0, chars96 = 0; |
3096 | } | |
3097 | else if (c1 >= 0x28 && c1 <= 0x2B) | |
3098 | { /* designation of DIMENSION2_CHARS94 character set */ | |
3099 | reg = c1 - 0x28, chars96 = 0; | |
3100 | ONE_MORE_BYTE (c1); | |
3101 | } | |
3102 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
3103 | { /* designation of DIMENSION2_CHARS96 character set */ | |
3104 | reg = c1 - 0x2C, chars96 = 1; | |
3105 | ONE_MORE_BYTE (c1); | |
3106 | } | |
3107 | else | |
3108 | goto invalid_code; | |
3109 | DECODE_DESIGNATION (reg, 2, chars96, c1); | |
3110 | /* We must update these variables now. */ | |
3111 | if (reg == 0) | |
3112 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
3113 | else if (reg == 1) | |
3114 | charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
3115 | if (chars96 < 0) | |
3116 | goto invalid_code; | |
3117 | } | |
b73bfc1c | 3118 | continue; |
4ed46869 KH |
3119 | |
3120 | case 'n': /* invocation of locking-shift-2 */ | |
df7492f9 KH |
3121 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
3122 | || CODING_ISO_DESIGNATION (coding, 2) < 0) | |
3123 | goto invalid_code; | |
3124 | CODING_ISO_INVOCATION (coding, 0) = 2; | |
3125 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 3126 | continue; |
4ed46869 KH |
3127 | |
3128 | case 'o': /* invocation of locking-shift-3 */ | |
df7492f9 KH |
3129 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
3130 | || CODING_ISO_DESIGNATION (coding, 3) < 0) | |
3131 | goto invalid_code; | |
3132 | CODING_ISO_INVOCATION (coding, 0) = 3; | |
3133 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 3134 | continue; |
4ed46869 KH |
3135 | |
3136 | case 'N': /* invocation of single-shift-2 */ | |
df7492f9 KH |
3137 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
3138 | || CODING_ISO_DESIGNATION (coding, 2) < 0) | |
3139 | goto invalid_code; | |
134b9549 KH |
3140 | charset_id_2 = CODING_ISO_DESIGNATION (coding, 2); |
3141 | if (charset_id_2 < 0) | |
3142 | charset = CHARSET_FROM_ID (charset_ascii); | |
3143 | else | |
3144 | charset = CHARSET_FROM_ID (charset_id_2); | |
b73bfc1c | 3145 | ONE_MORE_BYTE (c1); |
e7046a18 | 3146 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
df7492f9 | 3147 | goto invalid_code; |
4ed46869 KH |
3148 | break; |
3149 | ||
3150 | case 'O': /* invocation of single-shift-3 */ | |
df7492f9 KH |
3151 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
3152 | || CODING_ISO_DESIGNATION (coding, 3) < 0) | |
3153 | goto invalid_code; | |
134b9549 KH |
3154 | charset_id_3 = CODING_ISO_DESIGNATION (coding, 3); |
3155 | if (charset_id_3 < 0) | |
3156 | charset = CHARSET_FROM_ID (charset_ascii); | |
3157 | else | |
3158 | charset = CHARSET_FROM_ID (charset_id_3); | |
b73bfc1c | 3159 | ONE_MORE_BYTE (c1); |
e7046a18 | 3160 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
df7492f9 | 3161 | goto invalid_code; |
4ed46869 KH |
3162 | break; |
3163 | ||
ec6d2bb8 | 3164 | case '0': case '2': case '3': case '4': /* start composition */ |
df7492f9 KH |
3165 | if (! (coding->common_flags & CODING_ANNOTATE_COMPOSITION_MASK)) |
3166 | goto invalid_code; | |
ec6d2bb8 | 3167 | DECODE_COMPOSITION_START (c1); |
b73bfc1c | 3168 | continue; |
4ed46869 | 3169 | |
ec6d2bb8 | 3170 | case '1': /* end composition */ |
df7492f9 KH |
3171 | if (composition_state == COMPOSING_NO) |
3172 | goto invalid_code; | |
3173 | DECODE_COMPOSITION_END (); | |
b73bfc1c | 3174 | continue; |
4ed46869 KH |
3175 | |
3176 | case '[': /* specification of direction */ | |
df7492f9 KH |
3177 | if (! CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DIRECTION) |
3178 | goto invalid_code; | |
4ed46869 | 3179 | /* For the moment, nested direction is not supported. |
d46c5b12 | 3180 | So, `coding->mode & CODING_MODE_DIRECTION' zero means |
df7492f9 | 3181 | left-to-right, and nozero means right-to-left. */ |
4ed46869 KH |
3182 | ONE_MORE_BYTE (c1); |
3183 | switch (c1) | |
3184 | { | |
3185 | case ']': /* end of the current direction */ | |
d46c5b12 | 3186 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 KH |
3187 | |
3188 | case '0': /* end of the current direction */ | |
3189 | case '1': /* start of left-to-right direction */ | |
3190 | ONE_MORE_BYTE (c1); | |
3191 | if (c1 == ']') | |
d46c5b12 | 3192 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 | 3193 | else |
df7492f9 | 3194 | goto invalid_code; |
4ed46869 KH |
3195 | break; |
3196 | ||
3197 | case '2': /* start of right-to-left direction */ | |
3198 | ONE_MORE_BYTE (c1); | |
3199 | if (c1 == ']') | |
d46c5b12 | 3200 | coding->mode |= CODING_MODE_DIRECTION; |
4ed46869 | 3201 | else |
df7492f9 | 3202 | goto invalid_code; |
4ed46869 KH |
3203 | break; |
3204 | ||
3205 | default: | |
df7492f9 | 3206 | goto invalid_code; |
4ed46869 | 3207 | } |
b73bfc1c | 3208 | continue; |
4ed46869 | 3209 | |
103e0180 | 3210 | case '%': |
103e0180 KH |
3211 | ONE_MORE_BYTE (c1); |
3212 | if (c1 == '/') | |
3213 | { | |
3214 | /* CTEXT extended segment: | |
3215 | ESC % / [0-4] M L --ENCODING-NAME-- \002 --BYTES-- | |
3216 | We keep these bytes as is for the moment. | |
3217 | They may be decoded by post-read-conversion. */ | |
3218 | int dim, M, L; | |
4776e638 | 3219 | int size; |
8f924df7 | 3220 | |
103e0180 KH |
3221 | ONE_MORE_BYTE (dim); |
3222 | ONE_MORE_BYTE (M); | |
3223 | ONE_MORE_BYTE (L); | |
3224 | size = ((M - 128) * 128) + (L - 128); | |
4776e638 KH |
3225 | if (charbuf + 8 + size > charbuf_end) |
3226 | goto break_loop; | |
3227 | *charbuf++ = ISO_CODE_ESC; | |
3228 | *charbuf++ = '%'; | |
3229 | *charbuf++ = '/'; | |
3230 | *charbuf++ = dim; | |
3231 | *charbuf++ = BYTE8_TO_CHAR (M); | |
3232 | *charbuf++ = BYTE8_TO_CHAR (L); | |
103e0180 KH |
3233 | while (size-- > 0) |
3234 | { | |
3235 | ONE_MORE_BYTE (c1); | |
4776e638 | 3236 | *charbuf++ = ASCII_BYTE_P (c1) ? c1 : BYTE8_TO_CHAR (c1); |
103e0180 | 3237 | } |
103e0180 KH |
3238 | } |
3239 | else if (c1 == 'G') | |
3240 | { | |
103e0180 KH |
3241 | /* XFree86 extension for embedding UTF-8 in CTEXT: |
3242 | ESC % G --UTF-8-BYTES-- ESC % @ | |
3243 | We keep these bytes as is for the moment. | |
3244 | They may be decoded by post-read-conversion. */ | |
4776e638 KH |
3245 | int *p = charbuf; |
3246 | ||
3247 | if (p + 6 > charbuf_end) | |
3248 | goto break_loop; | |
3249 | *p++ = ISO_CODE_ESC; | |
3250 | *p++ = '%'; | |
3251 | *p++ = 'G'; | |
3252 | while (p < charbuf_end) | |
103e0180 KH |
3253 | { |
3254 | ONE_MORE_BYTE (c1); | |
3255 | if (c1 == ISO_CODE_ESC | |
3256 | && src + 1 < src_end | |
3257 | && src[0] == '%' | |
3258 | && src[1] == '@') | |
9ffd559c KH |
3259 | { |
3260 | src += 2; | |
3261 | break; | |
3262 | } | |
4776e638 | 3263 | *p++ = ASCII_BYTE_P (c1) ? c1 : BYTE8_TO_CHAR (c1); |
103e0180 | 3264 | } |
4776e638 KH |
3265 | if (p + 3 > charbuf_end) |
3266 | goto break_loop; | |
3267 | *p++ = ISO_CODE_ESC; | |
3268 | *p++ = '%'; | |
3269 | *p++ = '@'; | |
3270 | charbuf = p; | |
103e0180 KH |
3271 | } |
3272 | else | |
4776e638 | 3273 | goto invalid_code; |
103e0180 | 3274 | continue; |
4776e638 | 3275 | break; |
103e0180 | 3276 | |
4ed46869 | 3277 | default: |
df7492f9 KH |
3278 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATION)) |
3279 | goto invalid_code; | |
134b9549 KH |
3280 | { |
3281 | int reg, chars96; | |
3282 | ||
3283 | if (c1 >= 0x28 && c1 <= 0x2B) | |
3284 | { /* designation of DIMENSION1_CHARS94 character set */ | |
3285 | reg = c1 - 0x28, chars96 = 0; | |
3286 | ONE_MORE_BYTE (c1); | |
3287 | } | |
3288 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
3289 | { /* designation of DIMENSION1_CHARS96 character set */ | |
3290 | reg = c1 - 0x2C, chars96 = 1; | |
3291 | ONE_MORE_BYTE (c1); | |
3292 | } | |
3293 | else | |
3294 | goto invalid_code; | |
3295 | DECODE_DESIGNATION (reg, 1, chars96, c1); | |
3296 | /* We must update these variables now. */ | |
3297 | if (reg == 0) | |
3298 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
3299 | else if (reg == 1) | |
3300 | charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
3301 | if (chars96 < 0) | |
3302 | goto invalid_code; | |
3303 | } | |
b73bfc1c | 3304 | continue; |
4ed46869 | 3305 | } |
b73bfc1c | 3306 | } |
4ed46869 | 3307 | |
ff0dacd7 KH |
3308 | if (charset->id != charset_ascii |
3309 | && last_id != charset->id) | |
3310 | { | |
3311 | if (last_id != charset_ascii) | |
69a80ea3 | 3312 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
ff0dacd7 KH |
3313 | last_id = charset->id; |
3314 | last_offset = char_offset; | |
3315 | } | |
3316 | ||
b73bfc1c | 3317 | /* Now we know CHARSET and 1st position code C1 of a character. |
df7492f9 KH |
3318 | Produce a decoded character while getting 2nd position code |
3319 | C2 if necessary. */ | |
3320 | c1 &= 0x7F; | |
3321 | if (CHARSET_DIMENSION (charset) > 1) | |
b73bfc1c KH |
3322 | { |
3323 | ONE_MORE_BYTE (c2); | |
df7492f9 | 3324 | if (c2 < 0x20 || (c2 >= 0x80 && c2 < 0xA0)) |
b73bfc1c | 3325 | /* C2 is not in a valid range. */ |
df7492f9 KH |
3326 | goto invalid_code; |
3327 | c1 = (c1 << 8) | (c2 & 0x7F); | |
3328 | if (CHARSET_DIMENSION (charset) > 2) | |
3329 | { | |
3330 | ONE_MORE_BYTE (c2); | |
3331 | if (c2 < 0x20 || (c2 >= 0x80 && c2 < 0xA0)) | |
3332 | /* C2 is not in a valid range. */ | |
3333 | goto invalid_code; | |
3334 | c1 = (c1 << 8) | (c2 & 0x7F); | |
3335 | } | |
3336 | } | |
3337 | ||
3338 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c1, c); | |
3339 | if (c < 0) | |
3340 | { | |
3341 | MAYBE_FINISH_COMPOSITION (); | |
3342 | for (; src_base < src; src_base++, char_offset++) | |
3343 | { | |
3344 | if (ASCII_BYTE_P (*src_base)) | |
3345 | *charbuf++ = *src_base; | |
3346 | else | |
3347 | *charbuf++ = BYTE8_TO_CHAR (*src_base); | |
3348 | } | |
3349 | } | |
3350 | else if (composition_state == COMPOSING_NO) | |
3351 | { | |
3352 | *charbuf++ = c; | |
3353 | char_offset++; | |
4ed46869 | 3354 | } |
df7492f9 | 3355 | else |
781d7a48 KH |
3356 | { |
3357 | components[component_idx++] = c; | |
3358 | if (method == COMPOSITION_WITH_RULE | |
3359 | || (method == COMPOSITION_WITH_RULE_ALTCHARS | |
3360 | && composition_state == COMPOSING_COMPONENT_CHAR)) | |
3361 | composition_state++; | |
4ed46869 KH |
3362 | } |
3363 | continue; | |
3364 | ||
df7492f9 KH |
3365 | invalid_code: |
3366 | MAYBE_FINISH_COMPOSITION (); | |
4ed46869 | 3367 | src = src_base; |
df7492f9 KH |
3368 | consumed_chars = consumed_chars_base; |
3369 | ONE_MORE_BYTE (c); | |
065e3595 | 3370 | *charbuf++ = c < 0 ? -c : ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); |
ff0dacd7 | 3371 | char_offset++; |
df7492f9 | 3372 | coding->errors++; |
4776e638 KH |
3373 | continue; |
3374 | ||
3375 | break_loop: | |
3376 | break; | |
4ed46869 | 3377 | } |
fb88bf2d | 3378 | |
df7492f9 | 3379 | no_more_source: |
ff0dacd7 | 3380 | if (last_id != charset_ascii) |
69a80ea3 | 3381 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
df7492f9 KH |
3382 | coding->consumed_char += consumed_chars_base; |
3383 | coding->consumed = src_base - coding->source; | |
3384 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
3385 | } |
3386 | ||
b73bfc1c | 3387 | |
f4dee582 | 3388 | /* ISO2022 encoding stuff. */ |
4ed46869 KH |
3389 | |
3390 | /* | |
f4dee582 | 3391 | It is not enough to say just "ISO2022" on encoding, we have to |
df7492f9 | 3392 | specify more details. In Emacs, each coding system of ISO2022 |
4ed46869 | 3393 | variant has the following specifications: |
df7492f9 | 3394 | 1. Initial designation to G0 thru G3. |
4ed46869 KH |
3395 | 2. Allows short-form designation? |
3396 | 3. ASCII should be designated to G0 before control characters? | |
3397 | 4. ASCII should be designated to G0 at end of line? | |
3398 | 5. 7-bit environment or 8-bit environment? | |
3399 | 6. Use locking-shift? | |
3400 | 7. Use Single-shift? | |
3401 | And the following two are only for Japanese: | |
3402 | 8. Use ASCII in place of JIS0201-1976-Roman? | |
3403 | 9. Use JISX0208-1983 in place of JISX0208-1978? | |
df7492f9 KH |
3404 | These specifications are encoded in CODING_ISO_FLAGS (coding) as flag bits |
3405 | defined by macros CODING_ISO_FLAG_XXX. See `coding.h' for more | |
f4dee582 | 3406 | details. |
4ed46869 KH |
3407 | */ |
3408 | ||
3409 | /* Produce codes (escape sequence) for designating CHARSET to graphic | |
b73bfc1c KH |
3410 | register REG at DST, and increment DST. If <final-char> of CHARSET is |
3411 | '@', 'A', or 'B' and the coding system CODING allows, produce | |
3412 | designation sequence of short-form. */ | |
4ed46869 KH |
3413 | |
3414 | #define ENCODE_DESIGNATION(charset, reg, coding) \ | |
3415 | do { \ | |
df7492f9 | 3416 | unsigned char final_char = CHARSET_ISO_FINAL (charset); \ |
4ed46869 KH |
3417 | char *intermediate_char_94 = "()*+"; \ |
3418 | char *intermediate_char_96 = ",-./"; \ | |
df7492f9 KH |
3419 | int revision = -1; \ |
3420 | int c; \ | |
3421 | \ | |
3422 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_REVISION) \ | |
c197f191 | 3423 | revision = CHARSET_ISO_REVISION (charset); \ |
df7492f9 KH |
3424 | \ |
3425 | if (revision >= 0) \ | |
70c22245 | 3426 | { \ |
df7492f9 KH |
3427 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, '&'); \ |
3428 | EMIT_ONE_BYTE ('@' + revision); \ | |
4ed46869 | 3429 | } \ |
df7492f9 | 3430 | EMIT_ONE_ASCII_BYTE (ISO_CODE_ESC); \ |
4ed46869 KH |
3431 | if (CHARSET_DIMENSION (charset) == 1) \ |
3432 | { \ | |
df7492f9 KH |
3433 | if (! CHARSET_ISO_CHARS_96 (charset)) \ |
3434 | c = intermediate_char_94[reg]; \ | |
4ed46869 | 3435 | else \ |
df7492f9 KH |
3436 | c = intermediate_char_96[reg]; \ |
3437 | EMIT_ONE_ASCII_BYTE (c); \ | |
4ed46869 KH |
3438 | } \ |
3439 | else \ | |
3440 | { \ | |
df7492f9 KH |
3441 | EMIT_ONE_ASCII_BYTE ('$'); \ |
3442 | if (! CHARSET_ISO_CHARS_96 (charset)) \ | |
4ed46869 | 3443 | { \ |
df7492f9 | 3444 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LONG_FORM \ |
b73bfc1c KH |
3445 | || reg != 0 \ |
3446 | || final_char < '@' || final_char > 'B') \ | |
df7492f9 | 3447 | EMIT_ONE_ASCII_BYTE (intermediate_char_94[reg]); \ |
4ed46869 KH |
3448 | } \ |
3449 | else \ | |
df7492f9 | 3450 | EMIT_ONE_ASCII_BYTE (intermediate_char_96[reg]); \ |
4ed46869 | 3451 | } \ |
df7492f9 KH |
3452 | EMIT_ONE_ASCII_BYTE (final_char); \ |
3453 | \ | |
3454 | CODING_ISO_DESIGNATION (coding, reg) = CHARSET_ID (charset); \ | |
4ed46869 KH |
3455 | } while (0) |
3456 | ||
df7492f9 | 3457 | |
4ed46869 KH |
3458 | /* The following two macros produce codes (control character or escape |
3459 | sequence) for ISO2022 single-shift functions (single-shift-2 and | |
3460 | single-shift-3). */ | |
3461 | ||
df7492f9 KH |
3462 | #define ENCODE_SINGLE_SHIFT_2 \ |
3463 | do { \ | |
3464 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ | |
3465 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'N'); \ | |
3466 | else \ | |
3467 | EMIT_ONE_BYTE (ISO_CODE_SS2); \ | |
3468 | CODING_ISO_SINGLE_SHIFTING (coding) = 1; \ | |
4ed46869 KH |
3469 | } while (0) |
3470 | ||
df7492f9 KH |
3471 | |
3472 | #define ENCODE_SINGLE_SHIFT_3 \ | |
3473 | do { \ | |
3474 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ | |
3475 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'O'); \ | |
3476 | else \ | |
3477 | EMIT_ONE_BYTE (ISO_CODE_SS3); \ | |
3478 | CODING_ISO_SINGLE_SHIFTING (coding) = 1; \ | |
4ed46869 KH |
3479 | } while (0) |
3480 | ||
df7492f9 | 3481 | |
4ed46869 KH |
3482 | /* The following four macros produce codes (control character or |
3483 | escape sequence) for ISO2022 locking-shift functions (shift-in, | |
3484 | shift-out, locking-shift-2, and locking-shift-3). */ | |
3485 | ||
df7492f9 KH |
3486 | #define ENCODE_SHIFT_IN \ |
3487 | do { \ | |
3488 | EMIT_ONE_ASCII_BYTE (ISO_CODE_SI); \ | |
3489 | CODING_ISO_INVOCATION (coding, 0) = 0; \ | |
4ed46869 KH |
3490 | } while (0) |
3491 | ||
df7492f9 KH |
3492 | |
3493 | #define ENCODE_SHIFT_OUT \ | |
3494 | do { \ | |
3495 | EMIT_ONE_ASCII_BYTE (ISO_CODE_SO); \ | |
3496 | CODING_ISO_INVOCATION (coding, 0) = 1; \ | |
4ed46869 KH |
3497 | } while (0) |
3498 | ||
df7492f9 KH |
3499 | |
3500 | #define ENCODE_LOCKING_SHIFT_2 \ | |
3501 | do { \ | |
3502 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'n'); \ | |
3503 | CODING_ISO_INVOCATION (coding, 0) = 2; \ | |
4ed46869 KH |
3504 | } while (0) |
3505 | ||
df7492f9 KH |
3506 | |
3507 | #define ENCODE_LOCKING_SHIFT_3 \ | |
3508 | do { \ | |
3509 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'n'); \ | |
3510 | CODING_ISO_INVOCATION (coding, 0) = 3; \ | |
4ed46869 KH |
3511 | } while (0) |
3512 | ||
df7492f9 | 3513 | |
f4dee582 RS |
3514 | /* Produce codes for a DIMENSION1 character whose character set is |
3515 | CHARSET and whose position-code is C1. Designation and invocation | |
4ed46869 KH |
3516 | sequences are also produced in advance if necessary. */ |
3517 | ||
6e85d753 KH |
3518 | #define ENCODE_ISO_CHARACTER_DIMENSION1(charset, c1) \ |
3519 | do { \ | |
df7492f9 | 3520 | int id = CHARSET_ID (charset); \ |
bf16eb23 KH |
3521 | \ |
3522 | if ((CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_ROMAN) \ | |
3523 | && id == charset_ascii) \ | |
3524 | { \ | |
3525 | id = charset_jisx0201_roman; \ | |
3526 | charset = CHARSET_FROM_ID (id); \ | |
3527 | } \ | |
3528 | \ | |
df7492f9 | 3529 | if (CODING_ISO_SINGLE_SHIFTING (coding)) \ |
6e85d753 | 3530 | { \ |
df7492f9 KH |
3531 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ |
3532 | EMIT_ONE_ASCII_BYTE (c1 & 0x7F); \ | |
6e85d753 | 3533 | else \ |
df7492f9 KH |
3534 | EMIT_ONE_BYTE (c1 | 0x80); \ |
3535 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
6e85d753 KH |
3536 | break; \ |
3537 | } \ | |
df7492f9 | 3538 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 0)) \ |
6e85d753 | 3539 | { \ |
df7492f9 | 3540 | EMIT_ONE_ASCII_BYTE (c1 & 0x7F); \ |
6e85d753 KH |
3541 | break; \ |
3542 | } \ | |
df7492f9 | 3543 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 1)) \ |
6e85d753 | 3544 | { \ |
df7492f9 | 3545 | EMIT_ONE_BYTE (c1 | 0x80); \ |
6e85d753 KH |
3546 | break; \ |
3547 | } \ | |
6e85d753 KH |
3548 | else \ |
3549 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
3550 | must invoke it, or, at first, designate it to some graphic \ | |
3551 | register. Then repeat the loop to actually produce the \ | |
3552 | character. */ \ | |
df7492f9 KH |
3553 | dst = encode_invocation_designation (charset, coding, dst, \ |
3554 | &produced_chars); \ | |
4ed46869 KH |
3555 | } while (1) |
3556 | ||
df7492f9 | 3557 | |
f4dee582 RS |
3558 | /* Produce codes for a DIMENSION2 character whose character set is |
3559 | CHARSET and whose position-codes are C1 and C2. Designation and | |
4ed46869 KH |
3560 | invocation codes are also produced in advance if necessary. */ |
3561 | ||
6e85d753 KH |
3562 | #define ENCODE_ISO_CHARACTER_DIMENSION2(charset, c1, c2) \ |
3563 | do { \ | |
df7492f9 | 3564 | int id = CHARSET_ID (charset); \ |
bf16eb23 KH |
3565 | \ |
3566 | if ((CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_OLDJIS) \ | |
3567 | && id == charset_jisx0208) \ | |
3568 | { \ | |
3569 | id = charset_jisx0208_1978; \ | |
3570 | charset = CHARSET_FROM_ID (id); \ | |
3571 | } \ | |
3572 | \ | |
df7492f9 | 3573 | if (CODING_ISO_SINGLE_SHIFTING (coding)) \ |
6e85d753 | 3574 | { \ |
df7492f9 KH |
3575 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ |
3576 | EMIT_TWO_ASCII_BYTES ((c1) & 0x7F, (c2) & 0x7F); \ | |
6e85d753 | 3577 | else \ |
df7492f9 KH |
3578 | EMIT_TWO_BYTES ((c1) | 0x80, (c2) | 0x80); \ |
3579 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
6e85d753 KH |
3580 | break; \ |
3581 | } \ | |
df7492f9 | 3582 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 0)) \ |
6e85d753 | 3583 | { \ |
df7492f9 | 3584 | EMIT_TWO_ASCII_BYTES ((c1) & 0x7F, (c2) & 0x7F); \ |
6e85d753 KH |
3585 | break; \ |
3586 | } \ | |
df7492f9 | 3587 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 1)) \ |
6e85d753 | 3588 | { \ |
df7492f9 | 3589 | EMIT_TWO_BYTES ((c1) | 0x80, (c2) | 0x80); \ |
6e85d753 KH |
3590 | break; \ |
3591 | } \ | |
6e85d753 KH |
3592 | else \ |
3593 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
3594 | must invoke it, or, at first, designate it to some graphic \ | |
3595 | register. Then repeat the loop to actually produce the \ | |
3596 | character. */ \ | |
df7492f9 KH |
3597 | dst = encode_invocation_designation (charset, coding, dst, \ |
3598 | &produced_chars); \ | |
4ed46869 KH |
3599 | } while (1) |
3600 | ||
05e6f5dc | 3601 | |
df7492f9 KH |
3602 | #define ENCODE_ISO_CHARACTER(charset, c) \ |
3603 | do { \ | |
3604 | int code = ENCODE_CHAR ((charset),(c)); \ | |
3605 | \ | |
3606 | if (CHARSET_DIMENSION (charset) == 1) \ | |
3607 | ENCODE_ISO_CHARACTER_DIMENSION1 ((charset), code); \ | |
3608 | else \ | |
3609 | ENCODE_ISO_CHARACTER_DIMENSION2 ((charset), code >> 8, code & 0xFF); \ | |
84fbb8a0 | 3610 | } while (0) |
bdd9fb48 | 3611 | |
05e6f5dc | 3612 | |
4ed46869 | 3613 | /* Produce designation and invocation codes at a place pointed by DST |
df7492f9 | 3614 | to use CHARSET. The element `spec.iso_2022' of *CODING is updated. |
4ed46869 KH |
3615 | Return new DST. */ |
3616 | ||
3617 | unsigned char * | |
df7492f9 KH |
3618 | encode_invocation_designation (charset, coding, dst, p_nchars) |
3619 | struct charset *charset; | |
4ed46869 KH |
3620 | struct coding_system *coding; |
3621 | unsigned char *dst; | |
df7492f9 | 3622 | int *p_nchars; |
4ed46869 | 3623 | { |
df7492f9 KH |
3624 | int multibytep = coding->dst_multibyte; |
3625 | int produced_chars = *p_nchars; | |
4ed46869 | 3626 | int reg; /* graphic register number */ |
df7492f9 | 3627 | int id = CHARSET_ID (charset); |
4ed46869 KH |
3628 | |
3629 | /* At first, check designations. */ | |
3630 | for (reg = 0; reg < 4; reg++) | |
df7492f9 | 3631 | if (id == CODING_ISO_DESIGNATION (coding, reg)) |
4ed46869 KH |
3632 | break; |
3633 | ||
3634 | if (reg >= 4) | |
3635 | { | |
3636 | /* CHARSET is not yet designated to any graphic registers. */ | |
3637 | /* At first check the requested designation. */ | |
df7492f9 KH |
3638 | reg = CODING_ISO_REQUEST (coding, id); |
3639 | if (reg < 0) | |
1ba9e4ab KH |
3640 | /* Since CHARSET requests no special designation, designate it |
3641 | to graphic register 0. */ | |
4ed46869 KH |
3642 | reg = 0; |
3643 | ||
3644 | ENCODE_DESIGNATION (charset, reg, coding); | |
3645 | } | |
3646 | ||
df7492f9 KH |
3647 | if (CODING_ISO_INVOCATION (coding, 0) != reg |
3648 | && CODING_ISO_INVOCATION (coding, 1) != reg) | |
4ed46869 KH |
3649 | { |
3650 | /* Since the graphic register REG is not invoked to any graphic | |
3651 | planes, invoke it to graphic plane 0. */ | |
3652 | switch (reg) | |
3653 | { | |
3654 | case 0: /* graphic register 0 */ | |
3655 | ENCODE_SHIFT_IN; | |
3656 | break; | |
3657 | ||
3658 | case 1: /* graphic register 1 */ | |
3659 | ENCODE_SHIFT_OUT; | |
3660 | break; | |
3661 | ||
3662 | case 2: /* graphic register 2 */ | |
df7492f9 | 3663 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
4ed46869 KH |
3664 | ENCODE_SINGLE_SHIFT_2; |
3665 | else | |
3666 | ENCODE_LOCKING_SHIFT_2; | |
3667 | break; | |
3668 | ||
3669 | case 3: /* graphic register 3 */ | |
df7492f9 | 3670 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
4ed46869 KH |
3671 | ENCODE_SINGLE_SHIFT_3; |
3672 | else | |
3673 | ENCODE_LOCKING_SHIFT_3; | |
3674 | break; | |
3675 | } | |
3676 | } | |
b73bfc1c | 3677 | |
df7492f9 | 3678 | *p_nchars = produced_chars; |
4ed46869 KH |
3679 | return dst; |
3680 | } | |
3681 | ||
df7492f9 KH |
3682 | /* The following three macros produce codes for indicating direction |
3683 | of text. */ | |
3684 | #define ENCODE_CONTROL_SEQUENCE_INTRODUCER \ | |
ec6d2bb8 | 3685 | do { \ |
df7492f9 KH |
3686 | if (CODING_ISO_FLAGS (coding) == CODING_ISO_FLAG_SEVEN_BITS) \ |
3687 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, '['); \ | |
ec6d2bb8 | 3688 | else \ |
df7492f9 | 3689 | EMIT_ONE_BYTE (ISO_CODE_CSI); \ |
ec6d2bb8 KH |
3690 | } while (0) |
3691 | ||
ec6d2bb8 | 3692 | |
df7492f9 KH |
3693 | #define ENCODE_DIRECTION_R2L() \ |
3694 | do { \ | |
3695 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst); \ | |
3696 | EMIT_TWO_ASCII_BYTES ('2', ']'); \ | |
ec6d2bb8 KH |
3697 | } while (0) |
3698 | ||
ec6d2bb8 | 3699 | |
df7492f9 | 3700 | #define ENCODE_DIRECTION_L2R() \ |
ec6d2bb8 | 3701 | do { \ |
df7492f9 KH |
3702 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst); \ |
3703 | EMIT_TWO_ASCII_BYTES ('0', ']'); \ | |
ec6d2bb8 | 3704 | } while (0) |
4ed46869 | 3705 | |
4ed46869 KH |
3706 | |
3707 | /* Produce codes for designation and invocation to reset the graphic | |
3708 | planes and registers to initial state. */ | |
df7492f9 KH |
3709 | #define ENCODE_RESET_PLANE_AND_REGISTER() \ |
3710 | do { \ | |
3711 | int reg; \ | |
3712 | struct charset *charset; \ | |
3713 | \ | |
3714 | if (CODING_ISO_INVOCATION (coding, 0) != 0) \ | |
3715 | ENCODE_SHIFT_IN; \ | |
3716 | for (reg = 0; reg < 4; reg++) \ | |
3717 | if (CODING_ISO_INITIAL (coding, reg) >= 0 \ | |
3718 | && (CODING_ISO_DESIGNATION (coding, reg) \ | |
3719 | != CODING_ISO_INITIAL (coding, reg))) \ | |
3720 | { \ | |
3721 | charset = CHARSET_FROM_ID (CODING_ISO_INITIAL (coding, reg)); \ | |
3722 | ENCODE_DESIGNATION (charset, reg, coding); \ | |
3723 | } \ | |
4ed46869 KH |
3724 | } while (0) |
3725 | ||
df7492f9 | 3726 | |
bdd9fb48 | 3727 | /* Produce designation sequences of charsets in the line started from |
b73bfc1c | 3728 | SRC to a place pointed by DST, and return updated DST. |
bdd9fb48 KH |
3729 | |
3730 | If the current block ends before any end-of-line, we may fail to | |
d46c5b12 KH |
3731 | find all the necessary designations. */ |
3732 | ||
b73bfc1c | 3733 | static unsigned char * |
df7492f9 | 3734 | encode_designation_at_bol (coding, charbuf, charbuf_end, dst) |
e0e989f6 | 3735 | struct coding_system *coding; |
df7492f9 KH |
3736 | int *charbuf, *charbuf_end; |
3737 | unsigned char *dst; | |
e0e989f6 | 3738 | { |
df7492f9 | 3739 | struct charset *charset; |
bdd9fb48 KH |
3740 | /* Table of charsets to be designated to each graphic register. */ |
3741 | int r[4]; | |
df7492f9 KH |
3742 | int c, found = 0, reg; |
3743 | int produced_chars = 0; | |
3744 | int multibytep = coding->dst_multibyte; | |
3745 | Lisp_Object attrs; | |
3746 | Lisp_Object charset_list; | |
3747 | ||
3748 | attrs = CODING_ID_ATTRS (coding->id); | |
3749 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
3750 | if (EQ (charset_list, Qiso_2022)) | |
3751 | charset_list = Viso_2022_charset_list; | |
bdd9fb48 KH |
3752 | |
3753 | for (reg = 0; reg < 4; reg++) | |
3754 | r[reg] = -1; | |
3755 | ||
b73bfc1c | 3756 | while (found < 4) |
e0e989f6 | 3757 | { |
df7492f9 KH |
3758 | int id; |
3759 | ||
3760 | c = *charbuf++; | |
b73bfc1c KH |
3761 | if (c == '\n') |
3762 | break; | |
df7492f9 KH |
3763 | charset = char_charset (c, charset_list, NULL); |
3764 | id = CHARSET_ID (charset); | |
3765 | reg = CODING_ISO_REQUEST (coding, id); | |
3766 | if (reg >= 0 && r[reg] < 0) | |
bdd9fb48 KH |
3767 | { |
3768 | found++; | |
df7492f9 | 3769 | r[reg] = id; |
bdd9fb48 | 3770 | } |
bdd9fb48 KH |
3771 | } |
3772 | ||
3773 | if (found) | |
3774 | { | |
3775 | for (reg = 0; reg < 4; reg++) | |
3776 | if (r[reg] >= 0 | |
df7492f9 KH |
3777 | && CODING_ISO_DESIGNATION (coding, reg) != r[reg]) |
3778 | ENCODE_DESIGNATION (CHARSET_FROM_ID (r[reg]), reg, coding); | |
e0e989f6 | 3779 | } |
b73bfc1c KH |
3780 | |
3781 | return dst; | |
e0e989f6 KH |
3782 | } |
3783 | ||
4ed46869 KH |
3784 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */ |
3785 | ||
df7492f9 KH |
3786 | static int |
3787 | encode_coding_iso_2022 (coding) | |
4ed46869 | 3788 | struct coding_system *coding; |
4ed46869 | 3789 | { |
df7492f9 KH |
3790 | int multibytep = coding->dst_multibyte; |
3791 | int *charbuf = coding->charbuf; | |
3792 | int *charbuf_end = charbuf + coding->charbuf_used; | |
3793 | unsigned char *dst = coding->destination + coding->produced; | |
3794 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
3795 | int safe_room = 16; | |
3796 | int bol_designation | |
3797 | = (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATE_AT_BOL | |
3798 | && CODING_ISO_BOL (coding)); | |
3799 | int produced_chars = 0; | |
3800 | Lisp_Object attrs, eol_type, charset_list; | |
3801 | int ascii_compatible; | |
b73bfc1c | 3802 | int c; |
ff0dacd7 | 3803 | int preferred_charset_id = -1; |
05e6f5dc | 3804 | |
24a73b0a KH |
3805 | CODING_GET_INFO (coding, attrs, charset_list); |
3806 | eol_type = CODING_ID_EOL_TYPE (coding->id); | |
3807 | if (VECTORP (eol_type)) | |
3808 | eol_type = Qunix; | |
3809 | ||
004068e4 | 3810 | setup_iso_safe_charsets (attrs); |
ff0dacd7 | 3811 | /* Charset list may have been changed. */ |
287c57d7 | 3812 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); |
8f924df7 | 3813 | coding->safe_charsets = (char *) SDATA (CODING_ATTR_SAFE_CHARSETS(attrs)); |
0eecad43 | 3814 | |
df7492f9 | 3815 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); |
bdd9fb48 | 3816 | |
df7492f9 | 3817 | while (charbuf < charbuf_end) |
4ed46869 | 3818 | { |
df7492f9 | 3819 | ASSURE_DESTINATION (safe_room); |
b73bfc1c | 3820 | |
df7492f9 | 3821 | if (bol_designation) |
b73bfc1c | 3822 | { |
df7492f9 | 3823 | unsigned char *dst_prev = dst; |
4ed46869 | 3824 | |
bdd9fb48 | 3825 | /* We have to produce designation sequences if any now. */ |
df7492f9 KH |
3826 | dst = encode_designation_at_bol (coding, charbuf, charbuf_end, dst); |
3827 | bol_designation = 0; | |
3828 | /* We are sure that designation sequences are all ASCII bytes. */ | |
3829 | produced_chars += dst - dst_prev; | |
e0e989f6 KH |
3830 | } |
3831 | ||
df7492f9 | 3832 | c = *charbuf++; |
ec6d2bb8 | 3833 | |
ff0dacd7 KH |
3834 | if (c < 0) |
3835 | { | |
3836 | /* Handle an annotation. */ | |
3837 | switch (*charbuf) | |
ec6d2bb8 | 3838 | { |
ff0dacd7 KH |
3839 | case CODING_ANNOTATE_COMPOSITION_MASK: |
3840 | /* Not yet implemented. */ | |
3841 | break; | |
3842 | case CODING_ANNOTATE_CHARSET_MASK: | |
cf7dfdf5 | 3843 | preferred_charset_id = charbuf[2]; |
ff0dacd7 KH |
3844 | if (preferred_charset_id >= 0 |
3845 | && NILP (Fmemq (make_number (preferred_charset_id), | |
3846 | charset_list))) | |
3847 | preferred_charset_id = -1; | |
3848 | break; | |
3849 | default: | |
3850 | abort (); | |
4ed46869 | 3851 | } |
ff0dacd7 KH |
3852 | charbuf += -c - 1; |
3853 | continue; | |
4ed46869 | 3854 | } |
ec6d2bb8 | 3855 | |
b73bfc1c KH |
3856 | /* Now encode the character C. */ |
3857 | if (c < 0x20 || c == 0x7F) | |
3858 | { | |
df7492f9 KH |
3859 | if (c == '\n' |
3860 | || (c == '\r' && EQ (eol_type, Qmac))) | |
19a8d9e0 | 3861 | { |
df7492f9 KH |
3862 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_EOL) |
3863 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3864 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_INIT_AT_BOL) | |
b73bfc1c | 3865 | { |
df7492f9 KH |
3866 | int i; |
3867 | ||
3868 | for (i = 0; i < 4; i++) | |
3869 | CODING_ISO_DESIGNATION (coding, i) | |
3870 | = CODING_ISO_INITIAL (coding, i); | |
b73bfc1c | 3871 | } |
df7492f9 KH |
3872 | bol_designation |
3873 | = CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATE_AT_BOL; | |
19a8d9e0 | 3874 | } |
df7492f9 KH |
3875 | else if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_CNTL) |
3876 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3877 | EMIT_ONE_ASCII_BYTE (c); | |
4ed46869 | 3878 | } |
df7492f9 | 3879 | else if (ASCII_CHAR_P (c)) |
88993dfd | 3880 | { |
df7492f9 KH |
3881 | if (ascii_compatible) |
3882 | EMIT_ONE_ASCII_BYTE (c); | |
93dec019 | 3883 | else |
19a8d9e0 | 3884 | { |
bf16eb23 KH |
3885 | struct charset *charset = CHARSET_FROM_ID (charset_ascii); |
3886 | ENCODE_ISO_CHARACTER (charset, c); | |
19a8d9e0 | 3887 | } |
4ed46869 | 3888 | } |
16eafb5d | 3889 | else if (CHAR_BYTE8_P (c)) |
88993dfd | 3890 | { |
16eafb5d KH |
3891 | c = CHAR_TO_BYTE8 (c); |
3892 | EMIT_ONE_BYTE (c); | |
88993dfd | 3893 | } |
b73bfc1c | 3894 | else |
df7492f9 | 3895 | { |
ff0dacd7 | 3896 | struct charset *charset; |
b73bfc1c | 3897 | |
ff0dacd7 KH |
3898 | if (preferred_charset_id >= 0) |
3899 | { | |
3900 | charset = CHARSET_FROM_ID (preferred_charset_id); | |
3901 | if (! CHAR_CHARSET_P (c, charset)) | |
3902 | charset = char_charset (c, charset_list, NULL); | |
3903 | } | |
3904 | else | |
3905 | charset = char_charset (c, charset_list, NULL); | |
df7492f9 KH |
3906 | if (!charset) |
3907 | { | |
41cbe562 KH |
3908 | if (coding->mode & CODING_MODE_SAFE_ENCODING) |
3909 | { | |
3910 | c = CODING_INHIBIT_CHARACTER_SUBSTITUTION; | |
3911 | charset = CHARSET_FROM_ID (charset_ascii); | |
3912 | } | |
3913 | else | |
3914 | { | |
3915 | c = coding->default_char; | |
3916 | charset = char_charset (c, charset_list, NULL); | |
3917 | } | |
df7492f9 KH |
3918 | } |
3919 | ENCODE_ISO_CHARACTER (charset, c); | |
3920 | } | |
84fbb8a0 | 3921 | } |
b73bfc1c | 3922 | |
df7492f9 KH |
3923 | if (coding->mode & CODING_MODE_LAST_BLOCK |
3924 | && CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_EOL) | |
3925 | { | |
3926 | ASSURE_DESTINATION (safe_room); | |
3927 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3928 | } | |
065e3595 | 3929 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
3930 | CODING_ISO_BOL (coding) = bol_designation; |
3931 | coding->produced_char += produced_chars; | |
3932 | coding->produced = dst - coding->destination; | |
3933 | return 0; | |
4ed46869 KH |
3934 | } |
3935 | ||
3936 | \f | |
df7492f9 | 3937 | /*** 8,9. SJIS and BIG5 handlers ***/ |
4ed46869 | 3938 | |
df7492f9 | 3939 | /* Although SJIS and BIG5 are not ISO's coding system, they are used |
4ed46869 KH |
3940 | quite widely. So, for the moment, Emacs supports them in the bare |
3941 | C code. But, in the future, they may be supported only by CCL. */ | |
3942 | ||
3943 | /* SJIS is a coding system encoding three character sets: ASCII, right | |
3944 | half of JISX0201-Kana, and JISX0208. An ASCII character is encoded | |
3945 | as is. A character of charset katakana-jisx0201 is encoded by | |
3946 | "position-code + 0x80". A character of charset japanese-jisx0208 | |
3947 | is encoded in 2-byte but two position-codes are divided and shifted | |
df7492f9 | 3948 | so that it fit in the range below. |
4ed46869 KH |
3949 | |
3950 | --- CODE RANGE of SJIS --- | |
3951 | (character set) (range) | |
3952 | ASCII 0x00 .. 0x7F | |
df7492f9 | 3953 | KATAKANA-JISX0201 0xA0 .. 0xDF |
c28a9453 | 3954 | JISX0208 (1st byte) 0x81 .. 0x9F and 0xE0 .. 0xEF |
d14d03ac | 3955 | (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC |
4ed46869 KH |
3956 | ------------------------------- |
3957 | ||
3958 | */ | |
3959 | ||
3960 | /* BIG5 is a coding system encoding two character sets: ASCII and | |
3961 | Big5. An ASCII character is encoded as is. Big5 is a two-byte | |
df7492f9 | 3962 | character set and is encoded in two-byte. |
4ed46869 KH |
3963 | |
3964 | --- CODE RANGE of BIG5 --- | |
3965 | (character set) (range) | |
3966 | ASCII 0x00 .. 0x7F | |
3967 | Big5 (1st byte) 0xA1 .. 0xFE | |
3968 | (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE | |
3969 | -------------------------- | |
3970 | ||
df7492f9 | 3971 | */ |
4ed46869 KH |
3972 | |
3973 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3974 | Check if a text is encoded in SJIS. If it is, return | |
df7492f9 | 3975 | CATEGORY_MASK_SJIS, else return 0. */ |
4ed46869 | 3976 | |
0a28aafb | 3977 | static int |
ff0dacd7 | 3978 | detect_coding_sjis (coding, detect_info) |
df7492f9 | 3979 | struct coding_system *coding; |
ff0dacd7 | 3980 | struct coding_detection_info *detect_info; |
4ed46869 | 3981 | { |
065e3595 | 3982 | const unsigned char *src = coding->source, *src_base; |
8f924df7 | 3983 | const unsigned char *src_end = coding->source + coding->src_bytes; |
df7492f9 KH |
3984 | int multibytep = coding->src_multibyte; |
3985 | int consumed_chars = 0; | |
3986 | int found = 0; | |
b73bfc1c | 3987 | int c; |
df7492f9 | 3988 | |
ff0dacd7 | 3989 | detect_info->checked |= CATEGORY_MASK_SJIS; |
df7492f9 KH |
3990 | /* A coding system of this category is always ASCII compatible. */ |
3991 | src += coding->head_ascii; | |
4ed46869 | 3992 | |
b73bfc1c | 3993 | while (1) |
4ed46869 | 3994 | { |
065e3595 | 3995 | src_base = src; |
df7492f9 | 3996 | ONE_MORE_BYTE (c); |
682169fe KH |
3997 | if (c < 0x80) |
3998 | continue; | |
df7492f9 | 3999 | if ((c >= 0x81 && c <= 0x9F) || (c >= 0xE0 && c <= 0xEF)) |
4ed46869 | 4000 | { |
df7492f9 | 4001 | ONE_MORE_BYTE (c); |
682169fe | 4002 | if (c < 0x40 || c == 0x7F || c > 0xFC) |
df7492f9 | 4003 | break; |
ff0dacd7 | 4004 | found = CATEGORY_MASK_SJIS; |
4ed46869 | 4005 | } |
df7492f9 | 4006 | else if (c >= 0xA0 && c < 0xE0) |
ff0dacd7 | 4007 | found = CATEGORY_MASK_SJIS; |
df7492f9 KH |
4008 | else |
4009 | break; | |
4ed46869 | 4010 | } |
ff0dacd7 | 4011 | detect_info->rejected |= CATEGORY_MASK_SJIS; |
df7492f9 KH |
4012 | return 0; |
4013 | ||
4014 | no_more_source: | |
065e3595 | 4015 | if (src_base < src && coding->mode & CODING_MODE_LAST_BLOCK) |
89528eb3 | 4016 | { |
ff0dacd7 | 4017 | detect_info->rejected |= CATEGORY_MASK_SJIS; |
89528eb3 | 4018 | return 0; |
4ed46869 | 4019 | } |
ff0dacd7 KH |
4020 | detect_info->found |= found; |
4021 | return 1; | |
4ed46869 KH |
4022 | } |
4023 | ||
4024 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
4025 | Check if a text is encoded in BIG5. If it is, return | |
df7492f9 | 4026 | CATEGORY_MASK_BIG5, else return 0. */ |
4ed46869 | 4027 | |
0a28aafb | 4028 | static int |
ff0dacd7 | 4029 | detect_coding_big5 (coding, detect_info) |
df7492f9 | 4030 | struct coding_system *coding; |
ff0dacd7 | 4031 | struct coding_detection_info *detect_info; |
4ed46869 | 4032 | { |
065e3595 | 4033 | const unsigned char *src = coding->source, *src_base; |
8f924df7 | 4034 | const unsigned char *src_end = coding->source + coding->src_bytes; |
df7492f9 KH |
4035 | int multibytep = coding->src_multibyte; |
4036 | int consumed_chars = 0; | |
4037 | int found = 0; | |
b73bfc1c | 4038 | int c; |
fa42c37f | 4039 | |
ff0dacd7 | 4040 | detect_info->checked |= CATEGORY_MASK_BIG5; |
df7492f9 KH |
4041 | /* A coding system of this category is always ASCII compatible. */ |
4042 | src += coding->head_ascii; | |
fa42c37f | 4043 | |
b73bfc1c | 4044 | while (1) |
fa42c37f | 4045 | { |
065e3595 | 4046 | src_base = src; |
df7492f9 KH |
4047 | ONE_MORE_BYTE (c); |
4048 | if (c < 0x80) | |
fa42c37f | 4049 | continue; |
df7492f9 | 4050 | if (c >= 0xA1) |
fa42c37f | 4051 | { |
df7492f9 KH |
4052 | ONE_MORE_BYTE (c); |
4053 | if (c < 0x40 || (c >= 0x7F && c <= 0xA0)) | |
fa42c37f | 4054 | return 0; |
ff0dacd7 | 4055 | found = CATEGORY_MASK_BIG5; |
fa42c37f | 4056 | } |
df7492f9 KH |
4057 | else |
4058 | break; | |
fa42c37f | 4059 | } |
ff0dacd7 | 4060 | detect_info->rejected |= CATEGORY_MASK_BIG5; |
fa42c37f | 4061 | return 0; |
fa42c37f | 4062 | |
df7492f9 | 4063 | no_more_source: |
065e3595 | 4064 | if (src_base < src && coding->mode & CODING_MODE_LAST_BLOCK) |
89528eb3 | 4065 | { |
ff0dacd7 | 4066 | detect_info->rejected |= CATEGORY_MASK_BIG5; |
89528eb3 KH |
4067 | return 0; |
4068 | } | |
ff0dacd7 KH |
4069 | detect_info->found |= found; |
4070 | return 1; | |
fa42c37f KH |
4071 | } |
4072 | ||
4ed46869 KH |
4073 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". |
4074 | If SJIS_P is 1, decode SJIS text, else decode BIG5 test. */ | |
fa42c37f | 4075 | |
b73bfc1c | 4076 | static void |
df7492f9 | 4077 | decode_coding_sjis (coding) |
4ed46869 | 4078 | struct coding_system *coding; |
4ed46869 | 4079 | { |
8f924df7 KH |
4080 | const unsigned char *src = coding->source + coding->consumed; |
4081 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
4082 | const unsigned char *src_base; | |
69a80ea3 KH |
4083 | int *charbuf = coding->charbuf + coding->charbuf_used; |
4084 | int *charbuf_end | |
4085 | = coding->charbuf + coding->charbuf_size - MAX_ANNOTATION_LENGTH; | |
df7492f9 KH |
4086 | int consumed_chars = 0, consumed_chars_base; |
4087 | int multibytep = coding->src_multibyte; | |
4088 | struct charset *charset_roman, *charset_kanji, *charset_kana; | |
57a47f8a | 4089 | struct charset *charset_kanji2; |
24a73b0a | 4090 | Lisp_Object attrs, charset_list, val; |
ff0dacd7 KH |
4091 | int char_offset = coding->produced_char; |
4092 | int last_offset = char_offset; | |
4093 | int last_id = charset_ascii; | |
a5d301df | 4094 | |
24a73b0a | 4095 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 KH |
4096 | |
4097 | val = charset_list; | |
4098 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
89528eb3 | 4099 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); |
57a47f8a KH |
4100 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); |
4101 | charset_kanji2 = NILP (val) ? NULL : CHARSET_FROM_ID (XINT (XCAR (val))); | |
fa42c37f | 4102 | |
b73bfc1c | 4103 | while (1) |
4ed46869 | 4104 | { |
df7492f9 | 4105 | int c, c1; |
24a73b0a | 4106 | struct charset *charset; |
fa42c37f | 4107 | |
b73bfc1c | 4108 | src_base = src; |
df7492f9 | 4109 | consumed_chars_base = consumed_chars; |
fa42c37f | 4110 | |
df7492f9 KH |
4111 | if (charbuf >= charbuf_end) |
4112 | break; | |
4113 | ||
4114 | ONE_MORE_BYTE (c); | |
065e3595 KH |
4115 | if (c < 0) |
4116 | goto invalid_code; | |
24a73b0a KH |
4117 | if (c < 0x80) |
4118 | charset = charset_roman; | |
57a47f8a | 4119 | else if (c == 0x80 || c == 0xA0) |
8e921c4b | 4120 | goto invalid_code; |
57a47f8a KH |
4121 | else if (c >= 0xA1 && c <= 0xDF) |
4122 | { | |
4123 | /* SJIS -> JISX0201-Kana */ | |
4124 | c &= 0x7F; | |
4125 | charset = charset_kana; | |
4126 | } | |
4127 | else if (c <= 0xEF) | |
df7492f9 | 4128 | { |
57a47f8a KH |
4129 | /* SJIS -> JISX0208 */ |
4130 | ONE_MORE_BYTE (c1); | |
4131 | if (c1 < 0x40 || c1 == 0x7F || c1 > 0xFC) | |
24a73b0a | 4132 | goto invalid_code; |
57a47f8a KH |
4133 | c = (c << 8) | c1; |
4134 | SJIS_TO_JIS (c); | |
4135 | charset = charset_kanji; | |
4136 | } | |
4137 | else if (c <= 0xFC && charset_kanji2) | |
4138 | { | |
c6876370 | 4139 | /* SJIS -> JISX0213-2 */ |
57a47f8a KH |
4140 | ONE_MORE_BYTE (c1); |
4141 | if (c1 < 0x40 || c1 == 0x7F || c1 > 0xFC) | |
24a73b0a | 4142 | goto invalid_code; |
57a47f8a KH |
4143 | c = (c << 8) | c1; |
4144 | SJIS_TO_JIS2 (c); | |
4145 | charset = charset_kanji2; | |
df7492f9 | 4146 | } |
57a47f8a KH |
4147 | else |
4148 | goto invalid_code; | |
24a73b0a KH |
4149 | if (charset->id != charset_ascii |
4150 | && last_id != charset->id) | |
4151 | { | |
4152 | if (last_id != charset_ascii) | |
69a80ea3 | 4153 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
24a73b0a KH |
4154 | last_id = charset->id; |
4155 | last_offset = char_offset; | |
4156 | } | |
4157 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c, c); | |
df7492f9 | 4158 | *charbuf++ = c; |
ff0dacd7 | 4159 | char_offset++; |
df7492f9 | 4160 | continue; |
b73bfc1c | 4161 | |
df7492f9 KH |
4162 | invalid_code: |
4163 | src = src_base; | |
4164 | consumed_chars = consumed_chars_base; | |
4165 | ONE_MORE_BYTE (c); | |
065e3595 | 4166 | *charbuf++ = c < 0 ? -c : BYTE8_TO_CHAR (c); |
ff0dacd7 | 4167 | char_offset++; |
df7492f9 KH |
4168 | coding->errors++; |
4169 | } | |
fa42c37f | 4170 | |
df7492f9 | 4171 | no_more_source: |
ff0dacd7 | 4172 | if (last_id != charset_ascii) |
69a80ea3 | 4173 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
df7492f9 KH |
4174 | coding->consumed_char += consumed_chars_base; |
4175 | coding->consumed = src_base - coding->source; | |
4176 | coding->charbuf_used = charbuf - coding->charbuf; | |
fa42c37f KH |
4177 | } |
4178 | ||
b73bfc1c | 4179 | static void |
df7492f9 | 4180 | decode_coding_big5 (coding) |
4ed46869 | 4181 | struct coding_system *coding; |
4ed46869 | 4182 | { |
8f924df7 KH |
4183 | const unsigned char *src = coding->source + coding->consumed; |
4184 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
4185 | const unsigned char *src_base; | |
69a80ea3 KH |
4186 | int *charbuf = coding->charbuf + coding->charbuf_used; |
4187 | int *charbuf_end | |
4188 | = coding->charbuf + coding->charbuf_size - MAX_ANNOTATION_LENGTH; | |
df7492f9 KH |
4189 | int consumed_chars = 0, consumed_chars_base; |
4190 | int multibytep = coding->src_multibyte; | |
4191 | struct charset *charset_roman, *charset_big5; | |
24a73b0a | 4192 | Lisp_Object attrs, charset_list, val; |
ff0dacd7 KH |
4193 | int char_offset = coding->produced_char; |
4194 | int last_offset = char_offset; | |
4195 | int last_id = charset_ascii; | |
df7492f9 | 4196 | |
24a73b0a | 4197 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 KH |
4198 | val = charset_list; |
4199 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
4200 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
4ed46869 | 4201 | |
b73bfc1c | 4202 | while (1) |
4ed46869 | 4203 | { |
df7492f9 | 4204 | int c, c1; |
24a73b0a | 4205 | struct charset *charset; |
b73bfc1c KH |
4206 | |
4207 | src_base = src; | |
df7492f9 KH |
4208 | consumed_chars_base = consumed_chars; |
4209 | ||
4210 | if (charbuf >= charbuf_end) | |
4211 | break; | |
4212 | ||
4213 | ONE_MORE_BYTE (c); | |
b73bfc1c | 4214 | |
065e3595 KH |
4215 | if (c < 0) |
4216 | goto invalid_code; | |
24a73b0a KH |
4217 | if (c < 0x80) |
4218 | charset = charset_roman; | |
4219 | else | |
4ed46869 | 4220 | { |
24a73b0a KH |
4221 | /* BIG5 -> Big5 */ |
4222 | if (c < 0xA1 || c > 0xFE) | |
4223 | goto invalid_code; | |
4224 | ONE_MORE_BYTE (c1); | |
4225 | if (c1 < 0x40 || (c1 > 0x7E && c1 < 0xA1) || c1 > 0xFE) | |
4226 | goto invalid_code; | |
4227 | c = c << 8 | c1; | |
4228 | charset = charset_big5; | |
4ed46869 | 4229 | } |
24a73b0a KH |
4230 | if (charset->id != charset_ascii |
4231 | && last_id != charset->id) | |
df7492f9 | 4232 | { |
24a73b0a | 4233 | if (last_id != charset_ascii) |
69a80ea3 | 4234 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
24a73b0a KH |
4235 | last_id = charset->id; |
4236 | last_offset = char_offset; | |
4ed46869 | 4237 | } |
24a73b0a | 4238 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c, c); |
df7492f9 | 4239 | *charbuf++ = c; |
ff0dacd7 | 4240 | char_offset++; |
fb88bf2d KH |
4241 | continue; |
4242 | ||
df7492f9 | 4243 | invalid_code: |
4ed46869 | 4244 | src = src_base; |
df7492f9 KH |
4245 | consumed_chars = consumed_chars_base; |
4246 | ONE_MORE_BYTE (c); | |
065e3595 | 4247 | *charbuf++ = c < 0 ? -c : BYTE8_TO_CHAR (c); |
ff0dacd7 | 4248 | char_offset++; |
df7492f9 | 4249 | coding->errors++; |
fb88bf2d | 4250 | } |
d46c5b12 | 4251 | |
df7492f9 | 4252 | no_more_source: |
ff0dacd7 | 4253 | if (last_id != charset_ascii) |
69a80ea3 | 4254 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
df7492f9 KH |
4255 | coding->consumed_char += consumed_chars_base; |
4256 | coding->consumed = src_base - coding->source; | |
4257 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
4258 | } |
4259 | ||
4260 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". | |
b73bfc1c KH |
4261 | This function can encode charsets `ascii', `katakana-jisx0201', |
4262 | `japanese-jisx0208', `chinese-big5-1', and `chinese-big5-2'. We | |
4263 | are sure that all these charsets are registered as official charset | |
4ed46869 KH |
4264 | (i.e. do not have extended leading-codes). Characters of other |
4265 | charsets are produced without any encoding. If SJIS_P is 1, encode | |
4266 | SJIS text, else encode BIG5 text. */ | |
4267 | ||
df7492f9 KH |
4268 | static int |
4269 | encode_coding_sjis (coding) | |
4ed46869 | 4270 | struct coding_system *coding; |
4ed46869 | 4271 | { |
df7492f9 KH |
4272 | int multibytep = coding->dst_multibyte; |
4273 | int *charbuf = coding->charbuf; | |
4274 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4275 | unsigned char *dst = coding->destination + coding->produced; | |
4276 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4277 | int safe_room = 4; | |
4278 | int produced_chars = 0; | |
24a73b0a | 4279 | Lisp_Object attrs, charset_list, val; |
df7492f9 KH |
4280 | int ascii_compatible; |
4281 | struct charset *charset_roman, *charset_kanji, *charset_kana; | |
57a47f8a | 4282 | struct charset *charset_kanji2; |
df7492f9 | 4283 | int c; |
a5d301df | 4284 | |
24a73b0a | 4285 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 KH |
4286 | val = charset_list; |
4287 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
4288 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
57a47f8a KH |
4289 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); |
4290 | charset_kanji2 = NILP (val) ? NULL : CHARSET_FROM_ID (XINT (XCAR (val))); | |
4ed46869 | 4291 | |
df7492f9 | 4292 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); |
93dec019 | 4293 | |
df7492f9 KH |
4294 | while (charbuf < charbuf_end) |
4295 | { | |
4296 | ASSURE_DESTINATION (safe_room); | |
4297 | c = *charbuf++; | |
b73bfc1c | 4298 | /* Now encode the character C. */ |
df7492f9 KH |
4299 | if (ASCII_CHAR_P (c) && ascii_compatible) |
4300 | EMIT_ONE_ASCII_BYTE (c); | |
16eafb5d KH |
4301 | else if (CHAR_BYTE8_P (c)) |
4302 | { | |
4303 | c = CHAR_TO_BYTE8 (c); | |
4304 | EMIT_ONE_BYTE (c); | |
4305 | } | |
df7492f9 | 4306 | else |
b73bfc1c | 4307 | { |
df7492f9 KH |
4308 | unsigned code; |
4309 | struct charset *charset = char_charset (c, charset_list, &code); | |
4310 | ||
4311 | if (!charset) | |
4ed46869 | 4312 | { |
41cbe562 | 4313 | if (coding->mode & CODING_MODE_SAFE_ENCODING) |
b73bfc1c | 4314 | { |
41cbe562 KH |
4315 | code = CODING_INHIBIT_CHARACTER_SUBSTITUTION; |
4316 | charset = CHARSET_FROM_ID (charset_ascii); | |
b73bfc1c | 4317 | } |
41cbe562 | 4318 | else |
b73bfc1c | 4319 | { |
41cbe562 KH |
4320 | c = coding->default_char; |
4321 | charset = char_charset (c, charset_list, &code); | |
b73bfc1c | 4322 | } |
b73bfc1c | 4323 | } |
df7492f9 KH |
4324 | if (code == CHARSET_INVALID_CODE (charset)) |
4325 | abort (); | |
4326 | if (charset == charset_kanji) | |
4327 | { | |
4328 | int c1, c2; | |
4329 | JIS_TO_SJIS (code); | |
4330 | c1 = code >> 8, c2 = code & 0xFF; | |
4331 | EMIT_TWO_BYTES (c1, c2); | |
4332 | } | |
4333 | else if (charset == charset_kana) | |
4334 | EMIT_ONE_BYTE (code | 0x80); | |
57a47f8a KH |
4335 | else if (charset_kanji2 && charset == charset_kanji2) |
4336 | { | |
4337 | int c1, c2; | |
4338 | ||
4339 | c1 = code >> 8; | |
4340 | if (c1 == 0x21 || (c1 >= 0x23 && c1 < 0x25) | |
4341 | || (c1 >= 0x2C && c1 <= 0x2F) || c1 >= 0x6E) | |
4342 | { | |
4343 | JIS_TO_SJIS2 (code); | |
4344 | c1 = code >> 8, c2 = code & 0xFF; | |
4345 | EMIT_TWO_BYTES (c1, c2); | |
4346 | } | |
4347 | else | |
4348 | EMIT_ONE_ASCII_BYTE (code & 0x7F); | |
4349 | } | |
df7492f9 KH |
4350 | else |
4351 | EMIT_ONE_ASCII_BYTE (code & 0x7F); | |
4352 | } | |
4353 | } | |
065e3595 | 4354 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
4355 | coding->produced_char += produced_chars; |
4356 | coding->produced = dst - coding->destination; | |
4357 | return 0; | |
4358 | } | |
4359 | ||
4360 | static int | |
4361 | encode_coding_big5 (coding) | |
4362 | struct coding_system *coding; | |
4363 | { | |
4364 | int multibytep = coding->dst_multibyte; | |
4365 | int *charbuf = coding->charbuf; | |
4366 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4367 | unsigned char *dst = coding->destination + coding->produced; | |
4368 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4369 | int safe_room = 4; | |
4370 | int produced_chars = 0; | |
24a73b0a | 4371 | Lisp_Object attrs, charset_list, val; |
df7492f9 KH |
4372 | int ascii_compatible; |
4373 | struct charset *charset_roman, *charset_big5; | |
4374 | int c; | |
4375 | ||
24a73b0a | 4376 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 KH |
4377 | val = charset_list; |
4378 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
4379 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
4380 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); | |
4381 | ||
4382 | while (charbuf < charbuf_end) | |
4383 | { | |
4384 | ASSURE_DESTINATION (safe_room); | |
4385 | c = *charbuf++; | |
4386 | /* Now encode the character C. */ | |
4387 | if (ASCII_CHAR_P (c) && ascii_compatible) | |
4388 | EMIT_ONE_ASCII_BYTE (c); | |
16eafb5d KH |
4389 | else if (CHAR_BYTE8_P (c)) |
4390 | { | |
4391 | c = CHAR_TO_BYTE8 (c); | |
4392 | EMIT_ONE_BYTE (c); | |
b73bfc1c KH |
4393 | } |
4394 | else | |
4395 | { | |
df7492f9 KH |
4396 | unsigned code; |
4397 | struct charset *charset = char_charset (c, charset_list, &code); | |
4398 | ||
4399 | if (! charset) | |
b73bfc1c | 4400 | { |
41cbe562 | 4401 | if (coding->mode & CODING_MODE_SAFE_ENCODING) |
b73bfc1c | 4402 | { |
41cbe562 KH |
4403 | code = CODING_INHIBIT_CHARACTER_SUBSTITUTION; |
4404 | charset = CHARSET_FROM_ID (charset_ascii); | |
b73bfc1c | 4405 | } |
41cbe562 | 4406 | else |
0eecad43 | 4407 | { |
41cbe562 KH |
4408 | c = coding->default_char; |
4409 | charset = char_charset (c, charset_list, &code); | |
0eecad43 | 4410 | } |
4ed46869 | 4411 | } |
df7492f9 KH |
4412 | if (code == CHARSET_INVALID_CODE (charset)) |
4413 | abort (); | |
4414 | if (charset == charset_big5) | |
b73bfc1c | 4415 | { |
df7492f9 KH |
4416 | int c1, c2; |
4417 | ||
4418 | c1 = code >> 8, c2 = code & 0xFF; | |
4419 | EMIT_TWO_BYTES (c1, c2); | |
b73bfc1c | 4420 | } |
df7492f9 KH |
4421 | else |
4422 | EMIT_ONE_ASCII_BYTE (code & 0x7F); | |
4ed46869 | 4423 | } |
4ed46869 | 4424 | } |
065e3595 | 4425 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
4426 | coding->produced_char += produced_chars; |
4427 | coding->produced = dst - coding->destination; | |
4428 | return 0; | |
4ed46869 KH |
4429 | } |
4430 | ||
4431 | \f | |
df7492f9 | 4432 | /*** 10. CCL handlers ***/ |
1397dc18 KH |
4433 | |
4434 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
4435 | Check if a text is encoded in a coding system of which | |
4436 | encoder/decoder are written in CCL program. If it is, return | |
df7492f9 | 4437 | CATEGORY_MASK_CCL, else return 0. */ |
1397dc18 | 4438 | |
0a28aafb | 4439 | static int |
ff0dacd7 | 4440 | detect_coding_ccl (coding, detect_info) |
df7492f9 | 4441 | struct coding_system *coding; |
ff0dacd7 | 4442 | struct coding_detection_info *detect_info; |
1397dc18 | 4443 | { |
065e3595 | 4444 | const unsigned char *src = coding->source, *src_base; |
8f924df7 | 4445 | const unsigned char *src_end = coding->source + coding->src_bytes; |
df7492f9 KH |
4446 | int multibytep = coding->src_multibyte; |
4447 | int consumed_chars = 0; | |
4448 | int found = 0; | |
0e219d54 | 4449 | unsigned char *valids; |
df7492f9 KH |
4450 | int head_ascii = coding->head_ascii; |
4451 | Lisp_Object attrs; | |
4452 | ||
ff0dacd7 KH |
4453 | detect_info->checked |= CATEGORY_MASK_CCL; |
4454 | ||
df7492f9 | 4455 | coding = &coding_categories[coding_category_ccl]; |
0e219d54 | 4456 | valids = CODING_CCL_VALIDS (coding); |
df7492f9 KH |
4457 | attrs = CODING_ID_ATTRS (coding->id); |
4458 | if (! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
4459 | src += head_ascii; | |
1397dc18 | 4460 | |
b73bfc1c | 4461 | while (1) |
1397dc18 | 4462 | { |
df7492f9 | 4463 | int c; |
065e3595 KH |
4464 | |
4465 | src_base = src; | |
df7492f9 | 4466 | ONE_MORE_BYTE (c); |
065e3595 | 4467 | if (c < 0 || ! valids[c]) |
df7492f9 | 4468 | break; |
ff0dacd7 KH |
4469 | if ((valids[c] > 1)) |
4470 | found = CATEGORY_MASK_CCL; | |
df7492f9 | 4471 | } |
ff0dacd7 | 4472 | detect_info->rejected |= CATEGORY_MASK_CCL; |
df7492f9 KH |
4473 | return 0; |
4474 | ||
4475 | no_more_source: | |
ff0dacd7 KH |
4476 | detect_info->found |= found; |
4477 | return 1; | |
df7492f9 KH |
4478 | } |
4479 | ||
4480 | static void | |
4481 | decode_coding_ccl (coding) | |
4482 | struct coding_system *coding; | |
4483 | { | |
7c78e542 | 4484 | const unsigned char *src = coding->source + coding->consumed; |
8f924df7 | 4485 | const unsigned char *src_end = coding->source + coding->src_bytes; |
69a80ea3 KH |
4486 | int *charbuf = coding->charbuf + coding->charbuf_used; |
4487 | int *charbuf_end = coding->charbuf + coding->charbuf_size; | |
df7492f9 KH |
4488 | int consumed_chars = 0; |
4489 | int multibytep = coding->src_multibyte; | |
4490 | struct ccl_program ccl; | |
4491 | int source_charbuf[1024]; | |
4492 | int source_byteidx[1024]; | |
24a73b0a | 4493 | Lisp_Object attrs, charset_list; |
df7492f9 | 4494 | |
24a73b0a | 4495 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 KH |
4496 | setup_ccl_program (&ccl, CODING_CCL_DECODER (coding)); |
4497 | ||
4498 | while (src < src_end) | |
4499 | { | |
7c78e542 | 4500 | const unsigned char *p = src; |
df7492f9 KH |
4501 | int *source, *source_end; |
4502 | int i = 0; | |
4503 | ||
4504 | if (multibytep) | |
4505 | while (i < 1024 && p < src_end) | |
4506 | { | |
4507 | source_byteidx[i] = p - src; | |
4508 | source_charbuf[i++] = STRING_CHAR_ADVANCE (p); | |
4509 | } | |
4510 | else | |
4511 | while (i < 1024 && p < src_end) | |
4512 | source_charbuf[i++] = *p++; | |
8f924df7 | 4513 | |
df7492f9 KH |
4514 | if (p == src_end && coding->mode & CODING_MODE_LAST_BLOCK) |
4515 | ccl.last_block = 1; | |
4516 | ||
4517 | source = source_charbuf; | |
4518 | source_end = source + i; | |
4519 | while (source < source_end) | |
4520 | { | |
4521 | ccl_driver (&ccl, source, charbuf, | |
8dcbea82 KH |
4522 | source_end - source, charbuf_end - charbuf, |
4523 | charset_list); | |
df7492f9 KH |
4524 | source += ccl.consumed; |
4525 | charbuf += ccl.produced; | |
4526 | if (ccl.status != CCL_STAT_SUSPEND_BY_DST) | |
4527 | break; | |
4528 | } | |
4529 | if (source < source_end) | |
4530 | src += source_byteidx[source - source_charbuf]; | |
4531 | else | |
4532 | src = p; | |
4533 | consumed_chars += source - source_charbuf; | |
4534 | ||
4535 | if (ccl.status != CCL_STAT_SUSPEND_BY_SRC | |
4536 | && ccl.status != CODING_RESULT_INSUFFICIENT_SRC) | |
4537 | break; | |
4538 | } | |
4539 | ||
4540 | switch (ccl.status) | |
4541 | { | |
4542 | case CCL_STAT_SUSPEND_BY_SRC: | |
065e3595 | 4543 | record_conversion_result (coding, CODING_RESULT_INSUFFICIENT_SRC); |
df7492f9 KH |
4544 | break; |
4545 | case CCL_STAT_SUSPEND_BY_DST: | |
4546 | break; | |
4547 | case CCL_STAT_QUIT: | |
4548 | case CCL_STAT_INVALID_CMD: | |
065e3595 | 4549 | record_conversion_result (coding, CODING_RESULT_INTERRUPT); |
df7492f9 KH |
4550 | break; |
4551 | default: | |
065e3595 | 4552 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
4553 | break; |
4554 | } | |
4555 | coding->consumed_char += consumed_chars; | |
4556 | coding->consumed = src - coding->source; | |
4557 | coding->charbuf_used = charbuf - coding->charbuf; | |
4558 | } | |
4559 | ||
4560 | static int | |
4561 | encode_coding_ccl (coding) | |
4562 | struct coding_system *coding; | |
4563 | { | |
4564 | struct ccl_program ccl; | |
4565 | int multibytep = coding->dst_multibyte; | |
4566 | int *charbuf = coding->charbuf; | |
4567 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4568 | unsigned char *dst = coding->destination + coding->produced; | |
4569 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
df7492f9 KH |
4570 | int destination_charbuf[1024]; |
4571 | int i, produced_chars = 0; | |
24a73b0a | 4572 | Lisp_Object attrs, charset_list; |
df7492f9 | 4573 | |
24a73b0a | 4574 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 KH |
4575 | setup_ccl_program (&ccl, CODING_CCL_ENCODER (coding)); |
4576 | ||
4577 | ccl.last_block = coding->mode & CODING_MODE_LAST_BLOCK; | |
4578 | ccl.dst_multibyte = coding->dst_multibyte; | |
4579 | ||
8cffd3e7 | 4580 | while (charbuf < charbuf_end) |
df7492f9 | 4581 | { |
df7492f9 | 4582 | ccl_driver (&ccl, charbuf, destination_charbuf, |
8cffd3e7 | 4583 | charbuf_end - charbuf, 1024, charset_list); |
df7492f9 | 4584 | if (multibytep) |
8cffd3e7 KH |
4585 | { |
4586 | ASSURE_DESTINATION (ccl.produced * 2); | |
4587 | for (i = 0; i < ccl.produced; i++) | |
4588 | EMIT_ONE_BYTE (destination_charbuf[i] & 0xFF); | |
4589 | } | |
df7492f9 KH |
4590 | else |
4591 | { | |
8cffd3e7 | 4592 | ASSURE_DESTINATION (ccl.produced); |
df7492f9 KH |
4593 | for (i = 0; i < ccl.produced; i++) |
4594 | *dst++ = destination_charbuf[i] & 0xFF; | |
4595 | produced_chars += ccl.produced; | |
4596 | } | |
8cffd3e7 KH |
4597 | charbuf += ccl.consumed; |
4598 | if (ccl.status == CCL_STAT_QUIT | |
4599 | || ccl.status == CCL_STAT_INVALID_CMD) | |
4600 | break; | |
df7492f9 KH |
4601 | } |
4602 | ||
4603 | switch (ccl.status) | |
4604 | { | |
4605 | case CCL_STAT_SUSPEND_BY_SRC: | |
065e3595 | 4606 | record_conversion_result (coding, CODING_RESULT_INSUFFICIENT_SRC); |
df7492f9 KH |
4607 | break; |
4608 | case CCL_STAT_SUSPEND_BY_DST: | |
065e3595 | 4609 | record_conversion_result (coding, CODING_RESULT_INSUFFICIENT_DST); |
df7492f9 KH |
4610 | break; |
4611 | case CCL_STAT_QUIT: | |
4612 | case CCL_STAT_INVALID_CMD: | |
065e3595 | 4613 | record_conversion_result (coding, CODING_RESULT_INTERRUPT); |
df7492f9 KH |
4614 | break; |
4615 | default: | |
065e3595 | 4616 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 | 4617 | break; |
1397dc18 | 4618 | } |
df7492f9 KH |
4619 | |
4620 | coding->produced_char += produced_chars; | |
4621 | coding->produced = dst - coding->destination; | |
4622 | return 0; | |
1397dc18 KH |
4623 | } |
4624 | ||
df7492f9 | 4625 | |
1397dc18 | 4626 | \f |
df7492f9 | 4627 | /*** 10, 11. no-conversion handlers ***/ |
4ed46869 | 4628 | |
b73bfc1c | 4629 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
4ed46869 | 4630 | |
b73bfc1c | 4631 | static void |
df7492f9 | 4632 | decode_coding_raw_text (coding) |
4ed46869 | 4633 | struct coding_system *coding; |
4ed46869 | 4634 | { |
df7492f9 | 4635 | coding->chars_at_source = 1; |
2c78b7e1 KH |
4636 | coding->consumed_char = 0; |
4637 | coding->consumed = 0; | |
065e3595 | 4638 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 | 4639 | } |
4ed46869 | 4640 | |
df7492f9 KH |
4641 | static int |
4642 | encode_coding_raw_text (coding) | |
4643 | struct coding_system *coding; | |
4644 | { | |
4645 | int multibytep = coding->dst_multibyte; | |
4646 | int *charbuf = coding->charbuf; | |
4647 | int *charbuf_end = coding->charbuf + coding->charbuf_used; | |
4648 | unsigned char *dst = coding->destination + coding->produced; | |
4649 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4650 | int produced_chars = 0; | |
b73bfc1c KH |
4651 | int c; |
4652 | ||
df7492f9 | 4653 | if (multibytep) |
b73bfc1c | 4654 | { |
df7492f9 | 4655 | int safe_room = MAX_MULTIBYTE_LENGTH * 2; |
4ed46869 | 4656 | |
df7492f9 KH |
4657 | if (coding->src_multibyte) |
4658 | while (charbuf < charbuf_end) | |
4659 | { | |
4660 | ASSURE_DESTINATION (safe_room); | |
4661 | c = *charbuf++; | |
4662 | if (ASCII_CHAR_P (c)) | |
4663 | EMIT_ONE_ASCII_BYTE (c); | |
4664 | else if (CHAR_BYTE8_P (c)) | |
4665 | { | |
4666 | c = CHAR_TO_BYTE8 (c); | |
4667 | EMIT_ONE_BYTE (c); | |
4668 | } | |
4669 | else | |
4670 | { | |
4671 | unsigned char str[MAX_MULTIBYTE_LENGTH], *p0 = str, *p1 = str; | |
93dec019 | 4672 | |
df7492f9 KH |
4673 | CHAR_STRING_ADVANCE (c, p1); |
4674 | while (p0 < p1) | |
9d123124 KH |
4675 | { |
4676 | EMIT_ONE_BYTE (*p0); | |
4677 | p0++; | |
4678 | } | |
df7492f9 KH |
4679 | } |
4680 | } | |
b73bfc1c | 4681 | else |
df7492f9 KH |
4682 | while (charbuf < charbuf_end) |
4683 | { | |
4684 | ASSURE_DESTINATION (safe_room); | |
4685 | c = *charbuf++; | |
4686 | EMIT_ONE_BYTE (c); | |
4687 | } | |
4688 | } | |
4689 | else | |
4ed46869 | 4690 | { |
df7492f9 | 4691 | if (coding->src_multibyte) |
d46c5b12 | 4692 | { |
df7492f9 KH |
4693 | int safe_room = MAX_MULTIBYTE_LENGTH; |
4694 | ||
4695 | while (charbuf < charbuf_end) | |
d46c5b12 | 4696 | { |
df7492f9 KH |
4697 | ASSURE_DESTINATION (safe_room); |
4698 | c = *charbuf++; | |
4699 | if (ASCII_CHAR_P (c)) | |
4700 | *dst++ = c; | |
4701 | else if (CHAR_BYTE8_P (c)) | |
4702 | *dst++ = CHAR_TO_BYTE8 (c); | |
b73bfc1c | 4703 | else |
df7492f9 KH |
4704 | CHAR_STRING_ADVANCE (c, dst); |
4705 | produced_chars++; | |
d46c5b12 KH |
4706 | } |
4707 | } | |
df7492f9 KH |
4708 | else |
4709 | { | |
4710 | ASSURE_DESTINATION (charbuf_end - charbuf); | |
4711 | while (charbuf < charbuf_end && dst < dst_end) | |
4712 | *dst++ = *charbuf++; | |
4713 | produced_chars = dst - (coding->destination + coding->dst_bytes); | |
8f924df7 | 4714 | } |
4ed46869 | 4715 | } |
065e3595 | 4716 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
4717 | coding->produced_char += produced_chars; |
4718 | coding->produced = dst - coding->destination; | |
4719 | return 0; | |
4ed46869 KH |
4720 | } |
4721 | ||
ff0dacd7 KH |
4722 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
4723 | Check if a text is encoded in a charset-based coding system. If it | |
4724 | is, return 1, else return 0. */ | |
4725 | ||
0a28aafb | 4726 | static int |
ff0dacd7 | 4727 | detect_coding_charset (coding, detect_info) |
df7492f9 | 4728 | struct coding_system *coding; |
ff0dacd7 | 4729 | struct coding_detection_info *detect_info; |
1397dc18 | 4730 | { |
065e3595 | 4731 | const unsigned char *src = coding->source, *src_base; |
8f924df7 | 4732 | const unsigned char *src_end = coding->source + coding->src_bytes; |
df7492f9 KH |
4733 | int multibytep = coding->src_multibyte; |
4734 | int consumed_chars = 0; | |
4735 | Lisp_Object attrs, valids; | |
584948ac | 4736 | int found = 0; |
716b3fa0 | 4737 | int head_ascii = coding->head_ascii; |
1397dc18 | 4738 | |
ff0dacd7 KH |
4739 | detect_info->checked |= CATEGORY_MASK_CHARSET; |
4740 | ||
df7492f9 KH |
4741 | coding = &coding_categories[coding_category_charset]; |
4742 | attrs = CODING_ID_ATTRS (coding->id); | |
4743 | valids = AREF (attrs, coding_attr_charset_valids); | |
4744 | ||
4745 | if (! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
716b3fa0 | 4746 | src += head_ascii; |
1397dc18 | 4747 | |
b73bfc1c | 4748 | while (1) |
1397dc18 | 4749 | { |
df7492f9 | 4750 | int c; |
716b3fa0 KH |
4751 | Lisp_Object val; |
4752 | struct charset *charset; | |
4753 | int dim, idx; | |
1397dc18 | 4754 | |
065e3595 | 4755 | src_base = src; |
df7492f9 | 4756 | ONE_MORE_BYTE (c); |
065e3595 KH |
4757 | if (c < 0) |
4758 | continue; | |
716b3fa0 KH |
4759 | val = AREF (valids, c); |
4760 | if (NILP (val)) | |
df7492f9 | 4761 | break; |
584948ac | 4762 | if (c >= 0x80) |
ff0dacd7 | 4763 | found = CATEGORY_MASK_CHARSET; |
716b3fa0 KH |
4764 | if (INTEGERP (val)) |
4765 | { | |
4766 | charset = CHARSET_FROM_ID (XFASTINT (val)); | |
4767 | dim = CHARSET_DIMENSION (charset); | |
4768 | for (idx = 1; idx < dim; idx++) | |
4769 | { | |
4770 | if (src == src_end) | |
4771 | goto too_short; | |
4772 | ONE_MORE_BYTE (c); | |
4773 | if (c < charset->code_space[(dim - 1 - idx) * 2] | |
4774 | || c > charset->code_space[(dim - 1 - idx) * 2 + 1]) | |
4775 | break; | |
4776 | } | |
4777 | if (idx < dim) | |
4778 | break; | |
4779 | } | |
4780 | else | |
4781 | { | |
4782 | idx = 1; | |
4783 | for (; CONSP (val); val = XCDR (val)) | |
4784 | { | |
4785 | charset = CHARSET_FROM_ID (XFASTINT (XCAR (val))); | |
4786 | dim = CHARSET_DIMENSION (charset); | |
4787 | while (idx < dim) | |
4788 | { | |
4789 | if (src == src_end) | |
4790 | goto too_short; | |
4791 | ONE_MORE_BYTE (c); | |
4792 | if (c < charset->code_space[(dim - 1 - idx) * 4] | |
4793 | || c > charset->code_space[(dim - 1 - idx) * 4 + 1]) | |
4794 | break; | |
4795 | idx++; | |
4796 | } | |
4797 | if (idx == dim) | |
4798 | { | |
4799 | val = Qnil; | |
4800 | break; | |
4801 | } | |
4802 | } | |
4803 | if (CONSP (val)) | |
4804 | break; | |
4805 | } | |
df7492f9 | 4806 | } |
716b3fa0 | 4807 | too_short: |
ff0dacd7 | 4808 | detect_info->rejected |= CATEGORY_MASK_CHARSET; |
df7492f9 | 4809 | return 0; |
4ed46869 | 4810 | |
df7492f9 | 4811 | no_more_source: |
ff0dacd7 KH |
4812 | detect_info->found |= found; |
4813 | return 1; | |
df7492f9 | 4814 | } |
b73bfc1c | 4815 | |
b73bfc1c | 4816 | static void |
df7492f9 | 4817 | decode_coding_charset (coding) |
4ed46869 | 4818 | struct coding_system *coding; |
4ed46869 | 4819 | { |
8f924df7 KH |
4820 | const unsigned char *src = coding->source + coding->consumed; |
4821 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
4822 | const unsigned char *src_base; | |
69a80ea3 KH |
4823 | int *charbuf = coding->charbuf + coding->charbuf_used; |
4824 | int *charbuf_end | |
4825 | = coding->charbuf + coding->charbuf_size - MAX_ANNOTATION_LENGTH; | |
df7492f9 KH |
4826 | int consumed_chars = 0, consumed_chars_base; |
4827 | int multibytep = coding->src_multibyte; | |
24a73b0a | 4828 | Lisp_Object attrs, charset_list, valids; |
ff0dacd7 KH |
4829 | int char_offset = coding->produced_char; |
4830 | int last_offset = char_offset; | |
4831 | int last_id = charset_ascii; | |
df7492f9 | 4832 | |
24a73b0a | 4833 | CODING_GET_INFO (coding, attrs, charset_list); |
4eb6d3f1 | 4834 | valids = AREF (attrs, coding_attr_charset_valids); |
b73bfc1c | 4835 | |
df7492f9 | 4836 | while (1) |
4ed46869 | 4837 | { |
4eb6d3f1 | 4838 | int c; |
24a73b0a KH |
4839 | Lisp_Object val; |
4840 | struct charset *charset; | |
4841 | int dim; | |
4842 | int len = 1; | |
4843 | unsigned code; | |
df7492f9 KH |
4844 | |
4845 | src_base = src; | |
4846 | consumed_chars_base = consumed_chars; | |
b73bfc1c | 4847 | |
df7492f9 KH |
4848 | if (charbuf >= charbuf_end) |
4849 | break; | |
4850 | ||
4eb6d3f1 | 4851 | ONE_MORE_BYTE (c); |
065e3595 KH |
4852 | if (c < 0) |
4853 | goto invalid_code; | |
24a73b0a KH |
4854 | code = c; |
4855 | ||
4856 | val = AREF (valids, c); | |
4857 | if (NILP (val)) | |
4858 | goto invalid_code; | |
4859 | if (INTEGERP (val)) | |
d46c5b12 | 4860 | { |
24a73b0a KH |
4861 | charset = CHARSET_FROM_ID (XFASTINT (val)); |
4862 | dim = CHARSET_DIMENSION (charset); | |
4863 | while (len < dim) | |
b73bfc1c | 4864 | { |
24a73b0a KH |
4865 | ONE_MORE_BYTE (c); |
4866 | code = (code << 8) | c; | |
4867 | len++; | |
b73bfc1c | 4868 | } |
24a73b0a KH |
4869 | CODING_DECODE_CHAR (coding, src, src_base, src_end, |
4870 | charset, code, c); | |
d46c5b12 | 4871 | } |
df7492f9 | 4872 | else |
d46c5b12 | 4873 | { |
24a73b0a KH |
4874 | /* VAL is a list of charset IDs. It is assured that the |
4875 | list is sorted by charset dimensions (smaller one | |
4876 | comes first). */ | |
4877 | while (CONSP (val)) | |
4eb6d3f1 | 4878 | { |
24a73b0a | 4879 | charset = CHARSET_FROM_ID (XFASTINT (XCAR (val))); |
c7c66a95 | 4880 | dim = CHARSET_DIMENSION (charset); |
f9d71dcd | 4881 | while (len < dim) |
4eb6d3f1 | 4882 | { |
acb2a965 KH |
4883 | ONE_MORE_BYTE (c); |
4884 | code = (code << 8) | c; | |
f9d71dcd | 4885 | len++; |
4eb6d3f1 | 4886 | } |
24a73b0a KH |
4887 | CODING_DECODE_CHAR (coding, src, src_base, |
4888 | src_end, charset, code, c); | |
4889 | if (c >= 0) | |
4890 | break; | |
4891 | val = XCDR (val); | |
ff0dacd7 | 4892 | } |
d46c5b12 | 4893 | } |
24a73b0a KH |
4894 | if (c < 0) |
4895 | goto invalid_code; | |
4896 | if (charset->id != charset_ascii | |
4897 | && last_id != charset->id) | |
4898 | { | |
4899 | if (last_id != charset_ascii) | |
69a80ea3 | 4900 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
24a73b0a KH |
4901 | last_id = charset->id; |
4902 | last_offset = char_offset; | |
4903 | } | |
4904 | ||
df7492f9 | 4905 | *charbuf++ = c; |
ff0dacd7 | 4906 | char_offset++; |
df7492f9 KH |
4907 | continue; |
4908 | ||
4909 | invalid_code: | |
4910 | src = src_base; | |
4911 | consumed_chars = consumed_chars_base; | |
4912 | ONE_MORE_BYTE (c); | |
065e3595 | 4913 | *charbuf++ = c < 0 ? -c : ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); |
ff0dacd7 | 4914 | char_offset++; |
df7492f9 | 4915 | coding->errors++; |
4ed46869 KH |
4916 | } |
4917 | ||
df7492f9 | 4918 | no_more_source: |
ff0dacd7 | 4919 | if (last_id != charset_ascii) |
69a80ea3 | 4920 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
df7492f9 KH |
4921 | coding->consumed_char += consumed_chars_base; |
4922 | coding->consumed = src_base - coding->source; | |
4923 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
4924 | } |
4925 | ||
df7492f9 KH |
4926 | static int |
4927 | encode_coding_charset (coding) | |
4ed46869 | 4928 | struct coding_system *coding; |
4ed46869 | 4929 | { |
df7492f9 KH |
4930 | int multibytep = coding->dst_multibyte; |
4931 | int *charbuf = coding->charbuf; | |
4932 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4933 | unsigned char *dst = coding->destination + coding->produced; | |
4934 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4935 | int safe_room = MAX_MULTIBYTE_LENGTH; | |
4936 | int produced_chars = 0; | |
24a73b0a | 4937 | Lisp_Object attrs, charset_list; |
df7492f9 | 4938 | int ascii_compatible; |
b73bfc1c | 4939 | int c; |
b73bfc1c | 4940 | |
24a73b0a | 4941 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 | 4942 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); |
fb88bf2d | 4943 | |
df7492f9 | 4944 | while (charbuf < charbuf_end) |
4ed46869 | 4945 | { |
4eb6d3f1 | 4946 | struct charset *charset; |
df7492f9 | 4947 | unsigned code; |
8f924df7 | 4948 | |
df7492f9 KH |
4949 | ASSURE_DESTINATION (safe_room); |
4950 | c = *charbuf++; | |
4951 | if (ascii_compatible && ASCII_CHAR_P (c)) | |
4952 | EMIT_ONE_ASCII_BYTE (c); | |
16eafb5d | 4953 | else if (CHAR_BYTE8_P (c)) |
4ed46869 | 4954 | { |
16eafb5d KH |
4955 | c = CHAR_TO_BYTE8 (c); |
4956 | EMIT_ONE_BYTE (c); | |
d46c5b12 | 4957 | } |
d46c5b12 | 4958 | else |
b73bfc1c | 4959 | { |
4eb6d3f1 KH |
4960 | charset = char_charset (c, charset_list, &code); |
4961 | if (charset) | |
4962 | { | |
4963 | if (CHARSET_DIMENSION (charset) == 1) | |
4964 | EMIT_ONE_BYTE (code); | |
4965 | else if (CHARSET_DIMENSION (charset) == 2) | |
4966 | EMIT_TWO_BYTES (code >> 8, code & 0xFF); | |
4967 | else if (CHARSET_DIMENSION (charset) == 3) | |
4968 | EMIT_THREE_BYTES (code >> 16, (code >> 8) & 0xFF, code & 0xFF); | |
4969 | else | |
4970 | EMIT_FOUR_BYTES (code >> 24, (code >> 16) & 0xFF, | |
4971 | (code >> 8) & 0xFF, code & 0xFF); | |
4972 | } | |
4973 | else | |
41cbe562 KH |
4974 | { |
4975 | if (coding->mode & CODING_MODE_SAFE_ENCODING) | |
4976 | c = CODING_INHIBIT_CHARACTER_SUBSTITUTION; | |
4977 | else | |
4978 | c = coding->default_char; | |
4979 | EMIT_ONE_BYTE (c); | |
4980 | } | |
4ed46869 | 4981 | } |
4ed46869 KH |
4982 | } |
4983 | ||
065e3595 | 4984 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
4985 | coding->produced_char += produced_chars; |
4986 | coding->produced = dst - coding->destination; | |
4987 | return 0; | |
4ed46869 KH |
4988 | } |
4989 | ||
4990 | \f | |
1397dc18 | 4991 | /*** 7. C library functions ***/ |
4ed46869 | 4992 | |
df7492f9 KH |
4993 | /* Setup coding context CODING from information about CODING_SYSTEM. |
4994 | If CODING_SYSTEM is nil, `no-conversion' is assumed. If | |
4995 | CODING_SYSTEM is invalid, signal an error. */ | |
4ed46869 | 4996 | |
ec6d2bb8 | 4997 | void |
e0e989f6 KH |
4998 | setup_coding_system (coding_system, coding) |
4999 | Lisp_Object coding_system; | |
4ed46869 KH |
5000 | struct coding_system *coding; |
5001 | { | |
df7492f9 KH |
5002 | Lisp_Object attrs; |
5003 | Lisp_Object eol_type; | |
5004 | Lisp_Object coding_type; | |
4608c386 | 5005 | Lisp_Object val; |
4ed46869 | 5006 | |
df7492f9 | 5007 | if (NILP (coding_system)) |
ae6f73fa | 5008 | coding_system = Qundecided; |
c07c8e12 | 5009 | |
df7492f9 | 5010 | CHECK_CODING_SYSTEM_GET_ID (coding_system, coding->id); |
1f5dbf34 | 5011 | |
df7492f9 KH |
5012 | attrs = CODING_ID_ATTRS (coding->id); |
5013 | eol_type = CODING_ID_EOL_TYPE (coding->id); | |
1f5dbf34 | 5014 | |
df7492f9 KH |
5015 | coding->mode = 0; |
5016 | coding->head_ascii = -1; | |
4a015c45 KH |
5017 | if (VECTORP (eol_type)) |
5018 | coding->common_flags = (CODING_REQUIRE_DECODING_MASK | |
5019 | | CODING_REQUIRE_DETECTION_MASK); | |
5020 | else if (! EQ (eol_type, Qunix)) | |
5021 | coding->common_flags = (CODING_REQUIRE_DECODING_MASK | |
5022 | | CODING_REQUIRE_ENCODING_MASK); | |
5023 | else | |
5024 | coding->common_flags = 0; | |
5e5c78be KH |
5025 | if (! NILP (CODING_ATTR_POST_READ (attrs))) |
5026 | coding->common_flags |= CODING_REQUIRE_DECODING_MASK; | |
5027 | if (! NILP (CODING_ATTR_PRE_WRITE (attrs))) | |
5028 | coding->common_flags |= CODING_REQUIRE_ENCODING_MASK; | |
8f924df7 KH |
5029 | if (! NILP (CODING_ATTR_FOR_UNIBYTE (attrs))) |
5030 | coding->common_flags |= CODING_FOR_UNIBYTE_MASK; | |
1f5dbf34 | 5031 | |
df7492f9 | 5032 | val = CODING_ATTR_SAFE_CHARSETS (attrs); |
8f924df7 KH |
5033 | coding->max_charset_id = SCHARS (val) - 1; |
5034 | coding->safe_charsets = (char *) SDATA (val); | |
df7492f9 | 5035 | coding->default_char = XINT (CODING_ATTR_DEFAULT_CHAR (attrs)); |
4608c386 | 5036 | |
df7492f9 KH |
5037 | coding_type = CODING_ATTR_TYPE (attrs); |
5038 | if (EQ (coding_type, Qundecided)) | |
d46c5b12 | 5039 | { |
df7492f9 KH |
5040 | coding->detector = NULL; |
5041 | coding->decoder = decode_coding_raw_text; | |
5042 | coding->encoder = encode_coding_raw_text; | |
5043 | coding->common_flags |= CODING_REQUIRE_DETECTION_MASK; | |
d46c5b12 | 5044 | } |
df7492f9 | 5045 | else if (EQ (coding_type, Qiso_2022)) |
d46c5b12 | 5046 | { |
df7492f9 KH |
5047 | int i; |
5048 | int flags = XINT (AREF (attrs, coding_attr_iso_flags)); | |
5049 | ||
5050 | /* Invoke graphic register 0 to plane 0. */ | |
5051 | CODING_ISO_INVOCATION (coding, 0) = 0; | |
5052 | /* Invoke graphic register 1 to plane 1 if we can use 8-bit. */ | |
5053 | CODING_ISO_INVOCATION (coding, 1) | |
5054 | = (flags & CODING_ISO_FLAG_SEVEN_BITS ? -1 : 1); | |
5055 | /* Setup the initial status of designation. */ | |
5056 | for (i = 0; i < 4; i++) | |
5057 | CODING_ISO_DESIGNATION (coding, i) = CODING_ISO_INITIAL (coding, i); | |
5058 | /* Not single shifting initially. */ | |
5059 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; | |
5060 | /* Beginning of buffer should also be regarded as bol. */ | |
5061 | CODING_ISO_BOL (coding) = 1; | |
5062 | coding->detector = detect_coding_iso_2022; | |
5063 | coding->decoder = decode_coding_iso_2022; | |
5064 | coding->encoder = encode_coding_iso_2022; | |
5065 | if (flags & CODING_ISO_FLAG_SAFE) | |
5066 | coding->mode |= CODING_MODE_SAFE_ENCODING; | |
d46c5b12 | 5067 | coding->common_flags |
df7492f9 KH |
5068 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK |
5069 | | CODING_REQUIRE_FLUSHING_MASK); | |
5070 | if (flags & CODING_ISO_FLAG_COMPOSITION) | |
5071 | coding->common_flags |= CODING_ANNOTATE_COMPOSITION_MASK; | |
ff0dacd7 KH |
5072 | if (flags & CODING_ISO_FLAG_DESIGNATION) |
5073 | coding->common_flags |= CODING_ANNOTATE_CHARSET_MASK; | |
df7492f9 KH |
5074 | if (flags & CODING_ISO_FLAG_FULL_SUPPORT) |
5075 | { | |
5076 | setup_iso_safe_charsets (attrs); | |
5077 | val = CODING_ATTR_SAFE_CHARSETS (attrs); | |
8f924df7 KH |
5078 | coding->max_charset_id = SCHARS (val) - 1; |
5079 | coding->safe_charsets = (char *) SDATA (val); | |
df7492f9 KH |
5080 | } |
5081 | CODING_ISO_FLAGS (coding) = flags; | |
d46c5b12 | 5082 | } |
df7492f9 | 5083 | else if (EQ (coding_type, Qcharset)) |
d46c5b12 | 5084 | { |
df7492f9 KH |
5085 | coding->detector = detect_coding_charset; |
5086 | coding->decoder = decode_coding_charset; | |
5087 | coding->encoder = encode_coding_charset; | |
d46c5b12 | 5088 | coding->common_flags |
df7492f9 | 5089 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); |
d46c5b12 | 5090 | } |
df7492f9 | 5091 | else if (EQ (coding_type, Qutf_8)) |
d46c5b12 | 5092 | { |
df7492f9 KH |
5093 | coding->detector = detect_coding_utf_8; |
5094 | coding->decoder = decode_coding_utf_8; | |
5095 | coding->encoder = encode_coding_utf_8; | |
5096 | coding->common_flags | |
5097 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
5098 | } | |
5099 | else if (EQ (coding_type, Qutf_16)) | |
5100 | { | |
5101 | val = AREF (attrs, coding_attr_utf_16_bom); | |
5102 | CODING_UTF_16_BOM (coding) = (CONSP (val) ? utf_16_detect_bom | |
5103 | : EQ (val, Qt) ? utf_16_with_bom | |
5104 | : utf_16_without_bom); | |
5105 | val = AREF (attrs, coding_attr_utf_16_endian); | |
b49a1807 | 5106 | CODING_UTF_16_ENDIAN (coding) = (EQ (val, Qbig) ? utf_16_big_endian |
df7492f9 | 5107 | : utf_16_little_endian); |
e19c3639 | 5108 | CODING_UTF_16_SURROGATE (coding) = 0; |
df7492f9 KH |
5109 | coding->detector = detect_coding_utf_16; |
5110 | coding->decoder = decode_coding_utf_16; | |
5111 | coding->encoder = encode_coding_utf_16; | |
5112 | coding->common_flags | |
5113 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
b49a1807 KH |
5114 | if (CODING_UTF_16_BOM (coding) == utf_16_detect_bom) |
5115 | coding->common_flags |= CODING_REQUIRE_DETECTION_MASK; | |
d46c5b12 | 5116 | } |
df7492f9 | 5117 | else if (EQ (coding_type, Qccl)) |
4ed46869 | 5118 | { |
df7492f9 KH |
5119 | coding->detector = detect_coding_ccl; |
5120 | coding->decoder = decode_coding_ccl; | |
5121 | coding->encoder = encode_coding_ccl; | |
c952af22 | 5122 | coding->common_flags |
df7492f9 KH |
5123 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK |
5124 | | CODING_REQUIRE_FLUSHING_MASK); | |
5125 | } | |
5126 | else if (EQ (coding_type, Qemacs_mule)) | |
5127 | { | |
5128 | coding->detector = detect_coding_emacs_mule; | |
5129 | coding->decoder = decode_coding_emacs_mule; | |
5130 | coding->encoder = encode_coding_emacs_mule; | |
c952af22 | 5131 | coding->common_flags |
df7492f9 KH |
5132 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); |
5133 | if (! NILP (AREF (attrs, coding_attr_emacs_mule_full)) | |
5134 | && ! EQ (CODING_ATTR_CHARSET_LIST (attrs), Vemacs_mule_charset_list)) | |
5135 | { | |
5136 | Lisp_Object tail, safe_charsets; | |
5137 | int max_charset_id = 0; | |
5138 | ||
5139 | for (tail = Vemacs_mule_charset_list; CONSP (tail); | |
5140 | tail = XCDR (tail)) | |
5141 | if (max_charset_id < XFASTINT (XCAR (tail))) | |
5142 | max_charset_id = XFASTINT (XCAR (tail)); | |
5143 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), | |
5144 | make_number (255)); | |
5145 | for (tail = Vemacs_mule_charset_list; CONSP (tail); | |
5146 | tail = XCDR (tail)) | |
8f924df7 | 5147 | SSET (safe_charsets, XFASTINT (XCAR (tail)), 0); |
df7492f9 | 5148 | coding->max_charset_id = max_charset_id; |
8f924df7 | 5149 | coding->safe_charsets = (char *) SDATA (safe_charsets); |
df7492f9 KH |
5150 | } |
5151 | } | |
5152 | else if (EQ (coding_type, Qshift_jis)) | |
5153 | { | |
5154 | coding->detector = detect_coding_sjis; | |
5155 | coding->decoder = decode_coding_sjis; | |
5156 | coding->encoder = encode_coding_sjis; | |
c952af22 | 5157 | coding->common_flags |
df7492f9 KH |
5158 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); |
5159 | } | |
5160 | else if (EQ (coding_type, Qbig5)) | |
5161 | { | |
5162 | coding->detector = detect_coding_big5; | |
5163 | coding->decoder = decode_coding_big5; | |
5164 | coding->encoder = encode_coding_big5; | |
c952af22 | 5165 | coding->common_flags |
df7492f9 KH |
5166 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); |
5167 | } | |
5168 | else /* EQ (coding_type, Qraw_text) */ | |
ec6d2bb8 | 5169 | { |
df7492f9 KH |
5170 | coding->detector = NULL; |
5171 | coding->decoder = decode_coding_raw_text; | |
5172 | coding->encoder = encode_coding_raw_text; | |
ea29edf2 KH |
5173 | if (! EQ (eol_type, Qunix)) |
5174 | { | |
5175 | coding->common_flags |= CODING_REQUIRE_DECODING_MASK; | |
5176 | if (! VECTORP (eol_type)) | |
5177 | coding->common_flags |= CODING_REQUIRE_ENCODING_MASK; | |
5178 | } | |
5179 | ||
4ed46869 | 5180 | } |
4ed46869 | 5181 | |
df7492f9 | 5182 | return; |
4ed46869 KH |
5183 | } |
5184 | ||
0ff61e78 KH |
5185 | /* Return a list of charsets supported by CODING. */ |
5186 | ||
5187 | Lisp_Object | |
5188 | coding_charset_list (coding) | |
5189 | struct coding_system *coding; | |
5190 | { | |
35befdaa | 5191 | Lisp_Object attrs, charset_list; |
0ff61e78 KH |
5192 | |
5193 | CODING_GET_INFO (coding, attrs, charset_list); | |
5194 | if (EQ (CODING_ATTR_TYPE (attrs), Qiso_2022)) | |
5195 | { | |
5196 | int flags = XINT (AREF (attrs, coding_attr_iso_flags)); | |
5197 | ||
5198 | if (flags & CODING_ISO_FLAG_FULL_SUPPORT) | |
5199 | charset_list = Viso_2022_charset_list; | |
5200 | } | |
5201 | else if (EQ (CODING_ATTR_TYPE (attrs), Qemacs_mule)) | |
5202 | { | |
5203 | charset_list = Vemacs_mule_charset_list; | |
5204 | } | |
5205 | return charset_list; | |
5206 | } | |
5207 | ||
5208 | ||
df7492f9 KH |
5209 | /* Return raw-text or one of its subsidiaries that has the same |
5210 | eol_type as CODING-SYSTEM. */ | |
ec6d2bb8 | 5211 | |
df7492f9 KH |
5212 | Lisp_Object |
5213 | raw_text_coding_system (coding_system) | |
5214 | Lisp_Object coding_system; | |
ec6d2bb8 | 5215 | { |
0be8721c | 5216 | Lisp_Object spec, attrs; |
df7492f9 | 5217 | Lisp_Object eol_type, raw_text_eol_type; |
ec6d2bb8 | 5218 | |
d3e4cb56 KH |
5219 | if (NILP (coding_system)) |
5220 | return Qraw_text; | |
df7492f9 KH |
5221 | spec = CODING_SYSTEM_SPEC (coding_system); |
5222 | attrs = AREF (spec, 0); | |
ec6d2bb8 | 5223 | |
df7492f9 KH |
5224 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) |
5225 | return coding_system; | |
ec6d2bb8 | 5226 | |
df7492f9 KH |
5227 | eol_type = AREF (spec, 2); |
5228 | if (VECTORP (eol_type)) | |
5229 | return Qraw_text; | |
5230 | spec = CODING_SYSTEM_SPEC (Qraw_text); | |
5231 | raw_text_eol_type = AREF (spec, 2); | |
5232 | return (EQ (eol_type, Qunix) ? AREF (raw_text_eol_type, 0) | |
5233 | : EQ (eol_type, Qdos) ? AREF (raw_text_eol_type, 1) | |
5234 | : AREF (raw_text_eol_type, 2)); | |
ec6d2bb8 KH |
5235 | } |
5236 | ||
54f78171 | 5237 | |
df7492f9 KH |
5238 | /* If CODING_SYSTEM doesn't specify end-of-line format but PARENT |
5239 | does, return one of the subsidiary that has the same eol-spec as | |
fcbcfb64 KH |
5240 | PARENT. Otherwise, return CODING_SYSTEM. If PARENT is nil, |
5241 | inherit end-of-line format from the system's setting | |
5242 | (system_eol_type). */ | |
df7492f9 KH |
5243 | |
5244 | Lisp_Object | |
5245 | coding_inherit_eol_type (coding_system, parent) | |
b74e4686 | 5246 | Lisp_Object coding_system, parent; |
54f78171 | 5247 | { |
3e139625 | 5248 | Lisp_Object spec, eol_type; |
54f78171 | 5249 | |
d3e4cb56 KH |
5250 | if (NILP (coding_system)) |
5251 | coding_system = Qraw_text; | |
df7492f9 | 5252 | spec = CODING_SYSTEM_SPEC (coding_system); |
df7492f9 | 5253 | eol_type = AREF (spec, 2); |
fcbcfb64 | 5254 | if (VECTORP (eol_type)) |
df7492f9 | 5255 | { |
df7492f9 KH |
5256 | Lisp_Object parent_eol_type; |
5257 | ||
fcbcfb64 KH |
5258 | if (! NILP (parent)) |
5259 | { | |
5260 | Lisp_Object parent_spec; | |
5261 | ||
4a015c45 | 5262 | parent_spec = CODING_SYSTEM_SPEC (parent); |
fcbcfb64 KH |
5263 | parent_eol_type = AREF (parent_spec, 2); |
5264 | } | |
5265 | else | |
5266 | parent_eol_type = system_eol_type; | |
df7492f9 KH |
5267 | if (EQ (parent_eol_type, Qunix)) |
5268 | coding_system = AREF (eol_type, 0); | |
5269 | else if (EQ (parent_eol_type, Qdos)) | |
5270 | coding_system = AREF (eol_type, 1); | |
5271 | else if (EQ (parent_eol_type, Qmac)) | |
5272 | coding_system = AREF (eol_type, 2); | |
54f78171 | 5273 | } |
df7492f9 | 5274 | return coding_system; |
54f78171 KH |
5275 | } |
5276 | ||
4ed46869 KH |
5277 | /* Emacs has a mechanism to automatically detect a coding system if it |
5278 | is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But, | |
5279 | it's impossible to distinguish some coding systems accurately | |
5280 | because they use the same range of codes. So, at first, coding | |
5281 | systems are categorized into 7, those are: | |
5282 | ||
0ef69138 | 5283 | o coding-category-emacs-mule |
4ed46869 KH |
5284 | |
5285 | The category for a coding system which has the same code range | |
5286 | as Emacs' internal format. Assigned the coding-system (Lisp | |
0ef69138 | 5287 | symbol) `emacs-mule' by default. |
4ed46869 KH |
5288 | |
5289 | o coding-category-sjis | |
5290 | ||
5291 | The category for a coding system which has the same code range | |
5292 | as SJIS. Assigned the coding-system (Lisp | |
7717c392 | 5293 | symbol) `japanese-shift-jis' by default. |
4ed46869 KH |
5294 | |
5295 | o coding-category-iso-7 | |
5296 | ||
5297 | The category for a coding system which has the same code range | |
7717c392 | 5298 | as ISO2022 of 7-bit environment. This doesn't use any locking |
d46c5b12 KH |
5299 | shift and single shift functions. This can encode/decode all |
5300 | charsets. Assigned the coding-system (Lisp symbol) | |
5301 | `iso-2022-7bit' by default. | |
5302 | ||
5303 | o coding-category-iso-7-tight | |
5304 | ||
5305 | Same as coding-category-iso-7 except that this can | |
5306 | encode/decode only the specified charsets. | |
4ed46869 KH |
5307 | |
5308 | o coding-category-iso-8-1 | |
5309 | ||
5310 | The category for a coding system which has the same code range | |
5311 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
5312 | for DIMENSION1 charset. This doesn't use any locking shift |
5313 | and single shift functions. Assigned the coding-system (Lisp | |
5314 | symbol) `iso-latin-1' by default. | |
4ed46869 KH |
5315 | |
5316 | o coding-category-iso-8-2 | |
5317 | ||
5318 | The category for a coding system which has the same code range | |
5319 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
5320 | for DIMENSION2 charset. This doesn't use any locking shift |
5321 | and single shift functions. Assigned the coding-system (Lisp | |
5322 | symbol) `japanese-iso-8bit' by default. | |
4ed46869 | 5323 | |
7717c392 | 5324 | o coding-category-iso-7-else |
4ed46869 KH |
5325 | |
5326 | The category for a coding system which has the same code range | |
df7492f9 | 5327 | as ISO2022 of 7-bit environemnt but uses locking shift or |
7717c392 KH |
5328 | single shift functions. Assigned the coding-system (Lisp |
5329 | symbol) `iso-2022-7bit-lock' by default. | |
5330 | ||
5331 | o coding-category-iso-8-else | |
5332 | ||
5333 | The category for a coding system which has the same code range | |
df7492f9 | 5334 | as ISO2022 of 8-bit environemnt but uses locking shift or |
7717c392 KH |
5335 | single shift functions. Assigned the coding-system (Lisp |
5336 | symbol) `iso-2022-8bit-ss2' by default. | |
4ed46869 KH |
5337 | |
5338 | o coding-category-big5 | |
5339 | ||
5340 | The category for a coding system which has the same code range | |
5341 | as BIG5. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 5342 | `cn-big5' by default. |
4ed46869 | 5343 | |
fa42c37f KH |
5344 | o coding-category-utf-8 |
5345 | ||
5346 | The category for a coding system which has the same code range | |
6e76ae91 | 5347 | as UTF-8 (cf. RFC3629). Assigned the coding-system (Lisp |
fa42c37f KH |
5348 | symbol) `utf-8' by default. |
5349 | ||
5350 | o coding-category-utf-16-be | |
5351 | ||
5352 | The category for a coding system in which a text has an | |
5353 | Unicode signature (cf. Unicode Standard) in the order of BIG | |
5354 | endian at the head. Assigned the coding-system (Lisp symbol) | |
5355 | `utf-16-be' by default. | |
5356 | ||
5357 | o coding-category-utf-16-le | |
5358 | ||
5359 | The category for a coding system in which a text has an | |
5360 | Unicode signature (cf. Unicode Standard) in the order of | |
5361 | LITTLE endian at the head. Assigned the coding-system (Lisp | |
5362 | symbol) `utf-16-le' by default. | |
5363 | ||
1397dc18 KH |
5364 | o coding-category-ccl |
5365 | ||
5366 | The category for a coding system of which encoder/decoder is | |
5367 | written in CCL programs. The default value is nil, i.e., no | |
5368 | coding system is assigned. | |
5369 | ||
4ed46869 KH |
5370 | o coding-category-binary |
5371 | ||
5372 | The category for a coding system not categorized in any of the | |
5373 | above. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 5374 | `no-conversion' by default. |
4ed46869 KH |
5375 | |
5376 | Each of them is a Lisp symbol and the value is an actual | |
df7492f9 | 5377 | `coding-system's (this is also a Lisp symbol) assigned by a user. |
4ed46869 KH |
5378 | What Emacs does actually is to detect a category of coding system. |
5379 | Then, it uses a `coding-system' assigned to it. If Emacs can't | |
df7492f9 | 5380 | decide only one possible category, it selects a category of the |
4ed46869 KH |
5381 | highest priority. Priorities of categories are also specified by a |
5382 | user in a Lisp variable `coding-category-list'. | |
5383 | ||
5384 | */ | |
5385 | ||
df7492f9 KH |
5386 | #define EOL_SEEN_NONE 0 |
5387 | #define EOL_SEEN_LF 1 | |
5388 | #define EOL_SEEN_CR 2 | |
5389 | #define EOL_SEEN_CRLF 4 | |
66cfb530 | 5390 | |
ff0dacd7 KH |
5391 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by |
5392 | SOURCE is encoded. If CATEGORY is one of | |
5393 | coding_category_utf_16_XXXX, assume that CR and LF are encoded by | |
5394 | two-byte, else they are encoded by one-byte. | |
5395 | ||
5396 | Return one of EOL_SEEN_XXX. */ | |
4ed46869 | 5397 | |
bc4bc72a | 5398 | #define MAX_EOL_CHECK_COUNT 3 |
d46c5b12 KH |
5399 | |
5400 | static int | |
89528eb3 | 5401 | detect_eol (source, src_bytes, category) |
f6cbaf43 | 5402 | const unsigned char *source; |
df7492f9 | 5403 | EMACS_INT src_bytes; |
89528eb3 | 5404 | enum coding_category category; |
4ed46869 | 5405 | { |
f6cbaf43 | 5406 | const unsigned char *src = source, *src_end = src + src_bytes; |
4ed46869 | 5407 | unsigned char c; |
df7492f9 KH |
5408 | int total = 0; |
5409 | int eol_seen = EOL_SEEN_NONE; | |
4ed46869 | 5410 | |
89528eb3 | 5411 | if ((1 << category) & CATEGORY_MASK_UTF_16) |
4ed46869 | 5412 | { |
df7492f9 | 5413 | int msb, lsb; |
fa42c37f | 5414 | |
89528eb3 KH |
5415 | msb = category == (coding_category_utf_16_le |
5416 | | coding_category_utf_16_le_nosig); | |
df7492f9 | 5417 | lsb = 1 - msb; |
fa42c37f | 5418 | |
df7492f9 | 5419 | while (src + 1 < src_end) |
fa42c37f | 5420 | { |
df7492f9 KH |
5421 | c = src[lsb]; |
5422 | if (src[msb] == 0 && (c == '\n' || c == '\r')) | |
fa42c37f | 5423 | { |
df7492f9 KH |
5424 | int this_eol; |
5425 | ||
5426 | if (c == '\n') | |
5427 | this_eol = EOL_SEEN_LF; | |
5428 | else if (src + 3 >= src_end | |
5429 | || src[msb + 2] != 0 | |
5430 | || src[lsb + 2] != '\n') | |
5431 | this_eol = EOL_SEEN_CR; | |
fa42c37f | 5432 | else |
8f924df7 | 5433 | this_eol = EOL_SEEN_CRLF; |
df7492f9 KH |
5434 | |
5435 | if (eol_seen == EOL_SEEN_NONE) | |
5436 | /* This is the first end-of-line. */ | |
5437 | eol_seen = this_eol; | |
5438 | else if (eol_seen != this_eol) | |
fa42c37f | 5439 | { |
df7492f9 KH |
5440 | /* The found type is different from what found before. */ |
5441 | eol_seen = EOL_SEEN_LF; | |
5442 | break; | |
fa42c37f | 5443 | } |
df7492f9 KH |
5444 | if (++total == MAX_EOL_CHECK_COUNT) |
5445 | break; | |
fa42c37f | 5446 | } |
df7492f9 | 5447 | src += 2; |
fa42c37f | 5448 | } |
bcf26d6a | 5449 | } |
d46c5b12 | 5450 | else |
c4825358 | 5451 | { |
df7492f9 | 5452 | while (src < src_end) |
27901516 | 5453 | { |
df7492f9 KH |
5454 | c = *src++; |
5455 | if (c == '\n' || c == '\r') | |
5456 | { | |
5457 | int this_eol; | |
d46c5b12 | 5458 | |
df7492f9 KH |
5459 | if (c == '\n') |
5460 | this_eol = EOL_SEEN_LF; | |
5461 | else if (src >= src_end || *src != '\n') | |
5462 | this_eol = EOL_SEEN_CR; | |
5463 | else | |
5464 | this_eol = EOL_SEEN_CRLF, src++; | |
d46c5b12 | 5465 | |
df7492f9 KH |
5466 | if (eol_seen == EOL_SEEN_NONE) |
5467 | /* This is the first end-of-line. */ | |
5468 | eol_seen = this_eol; | |
5469 | else if (eol_seen != this_eol) | |
5470 | { | |
5471 | /* The found type is different from what found before. */ | |
5472 | eol_seen = EOL_SEEN_LF; | |
5473 | break; | |
5474 | } | |
5475 | if (++total == MAX_EOL_CHECK_COUNT) | |
5476 | break; | |
5477 | } | |
5478 | } | |
73be902c | 5479 | } |
df7492f9 | 5480 | return eol_seen; |
73be902c KH |
5481 | } |
5482 | ||
df7492f9 | 5483 | |
24a73b0a | 5484 | static Lisp_Object |
df7492f9 KH |
5485 | adjust_coding_eol_type (coding, eol_seen) |
5486 | struct coding_system *coding; | |
5487 | int eol_seen; | |
73be902c | 5488 | { |
0be8721c | 5489 | Lisp_Object eol_type; |
8f924df7 | 5490 | |
df7492f9 KH |
5491 | eol_type = CODING_ID_EOL_TYPE (coding->id); |
5492 | if (eol_seen & EOL_SEEN_LF) | |
24a73b0a KH |
5493 | { |
5494 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 0)); | |
5495 | eol_type = Qunix; | |
5496 | } | |
6f197c07 | 5497 | else if (eol_seen & EOL_SEEN_CRLF) |
24a73b0a KH |
5498 | { |
5499 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 1)); | |
5500 | eol_type = Qdos; | |
5501 | } | |
6f197c07 | 5502 | else if (eol_seen & EOL_SEEN_CR) |
24a73b0a KH |
5503 | { |
5504 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 2)); | |
5505 | eol_type = Qmac; | |
5506 | } | |
5507 | return eol_type; | |
d46c5b12 | 5508 | } |
4ed46869 | 5509 | |
df7492f9 KH |
5510 | /* Detect how a text specified in CODING is encoded. If a coding |
5511 | system is detected, update fields of CODING by the detected coding | |
5512 | system. */ | |
0a28aafb | 5513 | |
df7492f9 KH |
5514 | void |
5515 | detect_coding (coding) | |
d46c5b12 | 5516 | struct coding_system *coding; |
d46c5b12 | 5517 | { |
8f924df7 | 5518 | const unsigned char *src, *src_end; |
d46c5b12 | 5519 | |
df7492f9 KH |
5520 | coding->consumed = coding->consumed_char = 0; |
5521 | coding->produced = coding->produced_char = 0; | |
5522 | coding_set_source (coding); | |
1c3478b0 | 5523 | |
df7492f9 | 5524 | src_end = coding->source + coding->src_bytes; |
1c3478b0 | 5525 | |
df7492f9 KH |
5526 | /* If we have not yet decided the text encoding type, detect it |
5527 | now. */ | |
5528 | if (EQ (CODING_ATTR_TYPE (CODING_ID_ATTRS (coding->id)), Qundecided)) | |
b73bfc1c | 5529 | { |
df7492f9 | 5530 | int c, i; |
6cb21a4f | 5531 | struct coding_detection_info detect_info; |
df7492f9 | 5532 | |
6cb21a4f | 5533 | detect_info.checked = detect_info.found = detect_info.rejected = 0; |
24a73b0a | 5534 | for (i = 0, src = coding->source; src < src_end; i++, src++) |
d46c5b12 | 5535 | { |
df7492f9 | 5536 | c = *src; |
6cb21a4f | 5537 | if (c & 0x80) |
df7492f9 | 5538 | break; |
6cb21a4f KH |
5539 | if (c < 0x20 |
5540 | && (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) | |
5541 | && ! inhibit_iso_escape_detection | |
5542 | && ! detect_info.checked) | |
5543 | { | |
5544 | coding->head_ascii = src - (coding->source + coding->consumed); | |
5545 | if (detect_coding_iso_2022 (coding, &detect_info)) | |
5546 | { | |
5547 | /* We have scanned the whole data. */ | |
5548 | if (! (detect_info.rejected & CATEGORY_MASK_ISO_7_ELSE)) | |
5549 | /* We didn't find an 8-bit code. */ | |
5550 | src = src_end; | |
5551 | break; | |
5552 | } | |
5553 | } | |
d46c5b12 | 5554 | } |
df7492f9 KH |
5555 | coding->head_ascii = src - (coding->source + coding->consumed); |
5556 | ||
3aef54f3 | 5557 | if (coding->head_ascii < coding->src_bytes |
6cb21a4f | 5558 | || detect_info.found) |
d46c5b12 | 5559 | { |
ff0dacd7 KH |
5560 | enum coding_category category; |
5561 | struct coding_system *this; | |
df7492f9 | 5562 | |
6cb21a4f KH |
5563 | if (coding->head_ascii == coding->src_bytes) |
5564 | /* As all bytes are 7-bit, we can ignore non-ISO-2022 codings. */ | |
5565 | for (i = 0; i < coding_category_raw_text; i++) | |
5566 | { | |
5567 | category = coding_priorities[i]; | |
5568 | this = coding_categories + category; | |
5569 | if (detect_info.found & (1 << category)) | |
24a73b0a | 5570 | break; |
6cb21a4f KH |
5571 | } |
5572 | else | |
5573 | for (i = 0; i < coding_category_raw_text; i++) | |
5574 | { | |
5575 | category = coding_priorities[i]; | |
5576 | this = coding_categories + category; | |
5577 | if (this->id < 0) | |
5578 | { | |
5579 | /* No coding system of this category is defined. */ | |
5580 | detect_info.rejected |= (1 << category); | |
5581 | } | |
5582 | else if (category >= coding_category_raw_text) | |
5583 | continue; | |
5584 | else if (detect_info.checked & (1 << category)) | |
5585 | { | |
5586 | if (detect_info.found & (1 << category)) | |
5587 | break; | |
5588 | } | |
5589 | else if ((*(this->detector)) (coding, &detect_info) | |
5590 | && detect_info.found & (1 << category)) | |
5591 | { | |
5592 | if (category == coding_category_utf_16_auto) | |
5593 | { | |
5594 | if (detect_info.found & CATEGORY_MASK_UTF_16_LE) | |
5595 | category = coding_category_utf_16_le; | |
5596 | else | |
5597 | category = coding_category_utf_16_be; | |
5598 | } | |
5599 | break; | |
5600 | } | |
5601 | } | |
5602 | ||
ff0dacd7 KH |
5603 | if (i < coding_category_raw_text) |
5604 | setup_coding_system (CODING_ID_NAME (this->id), coding); | |
5605 | else if (detect_info.rejected == CATEGORY_MASK_ANY) | |
df7492f9 | 5606 | setup_coding_system (Qraw_text, coding); |
ff0dacd7 | 5607 | else if (detect_info.rejected) |
df7492f9 | 5608 | for (i = 0; i < coding_category_raw_text; i++) |
ff0dacd7 KH |
5609 | if (! (detect_info.rejected & (1 << coding_priorities[i]))) |
5610 | { | |
5611 | this = coding_categories + coding_priorities[i]; | |
5612 | setup_coding_system (CODING_ID_NAME (this->id), coding); | |
5613 | break; | |
5614 | } | |
d46c5b12 | 5615 | } |
b73bfc1c | 5616 | } |
24a73b0a KH |
5617 | else if (XINT (CODING_ATTR_CATEGORY (CODING_ID_ATTRS (coding->id))) |
5618 | == coding_category_utf_16_auto) | |
b49a1807 KH |
5619 | { |
5620 | Lisp_Object coding_systems; | |
5621 | struct coding_detection_info detect_info; | |
5622 | ||
5623 | coding_systems | |
5624 | = AREF (CODING_ID_ATTRS (coding->id), coding_attr_utf_16_bom); | |
5625 | detect_info.found = detect_info.rejected = 0; | |
5626 | if (CONSP (coding_systems) | |
24a73b0a | 5627 | && detect_coding_utf_16 (coding, &detect_info)) |
b49a1807 KH |
5628 | { |
5629 | if (detect_info.found & CATEGORY_MASK_UTF_16_LE) | |
5630 | setup_coding_system (XCAR (coding_systems), coding); | |
24a73b0a | 5631 | else if (detect_info.found & CATEGORY_MASK_UTF_16_BE) |
b49a1807 KH |
5632 | setup_coding_system (XCDR (coding_systems), coding); |
5633 | } | |
5634 | } | |
4ed46869 | 5635 | } |
4ed46869 | 5636 | |
d46c5b12 | 5637 | |
aaaf0b1e | 5638 | static void |
df7492f9 | 5639 | decode_eol (coding) |
aaaf0b1e | 5640 | struct coding_system *coding; |
aaaf0b1e | 5641 | { |
24a73b0a KH |
5642 | Lisp_Object eol_type; |
5643 | unsigned char *p, *pbeg, *pend; | |
5644 | ||
5645 | eol_type = CODING_ID_EOL_TYPE (coding->id); | |
5646 | if (EQ (eol_type, Qunix)) | |
5647 | return; | |
5648 | ||
5649 | if (NILP (coding->dst_object)) | |
5650 | pbeg = coding->destination; | |
5651 | else | |
5652 | pbeg = BYTE_POS_ADDR (coding->dst_pos_byte); | |
5653 | pend = pbeg + coding->produced; | |
5654 | ||
5655 | if (VECTORP (eol_type)) | |
aaaf0b1e | 5656 | { |
df7492f9 | 5657 | int eol_seen = EOL_SEEN_NONE; |
4ed46869 | 5658 | |
24a73b0a | 5659 | for (p = pbeg; p < pend; p++) |
aaaf0b1e | 5660 | { |
df7492f9 KH |
5661 | if (*p == '\n') |
5662 | eol_seen |= EOL_SEEN_LF; | |
5663 | else if (*p == '\r') | |
aaaf0b1e | 5664 | { |
df7492f9 | 5665 | if (p + 1 < pend && *(p + 1) == '\n') |
aaaf0b1e | 5666 | { |
df7492f9 KH |
5667 | eol_seen |= EOL_SEEN_CRLF; |
5668 | p++; | |
aaaf0b1e | 5669 | } |
aaaf0b1e | 5670 | else |
df7492f9 | 5671 | eol_seen |= EOL_SEEN_CR; |
aaaf0b1e | 5672 | } |
aaaf0b1e | 5673 | } |
24a73b0a KH |
5674 | if (eol_seen != EOL_SEEN_NONE |
5675 | && eol_seen != EOL_SEEN_LF | |
5676 | && eol_seen != EOL_SEEN_CRLF | |
5677 | && eol_seen != EOL_SEEN_CR) | |
5678 | eol_seen = EOL_SEEN_LF; | |
df7492f9 | 5679 | if (eol_seen != EOL_SEEN_NONE) |
24a73b0a | 5680 | eol_type = adjust_coding_eol_type (coding, eol_seen); |
aaaf0b1e | 5681 | } |
d46c5b12 | 5682 | |
24a73b0a | 5683 | if (EQ (eol_type, Qmac)) |
27901516 | 5684 | { |
24a73b0a | 5685 | for (p = pbeg; p < pend; p++) |
df7492f9 KH |
5686 | if (*p == '\r') |
5687 | *p = '\n'; | |
4ed46869 | 5688 | } |
24a73b0a | 5689 | else if (EQ (eol_type, Qdos)) |
df7492f9 | 5690 | { |
24a73b0a | 5691 | int n = 0; |
b73bfc1c | 5692 | |
24a73b0a KH |
5693 | if (NILP (coding->dst_object)) |
5694 | { | |
4347441b KH |
5695 | /* Start deleting '\r' from the tail to minimize the memory |
5696 | movement. */ | |
24a73b0a KH |
5697 | for (p = pend - 2; p >= pbeg; p--) |
5698 | if (*p == '\r') | |
5699 | { | |
5700 | safe_bcopy ((char *) (p + 1), (char *) p, pend-- - p - 1); | |
5701 | n++; | |
5702 | } | |
5703 | } | |
5704 | else | |
5705 | { | |
4347441b KH |
5706 | int pos_byte = coding->dst_pos_byte; |
5707 | int pos = coding->dst_pos; | |
5708 | int pos_end = pos + coding->produced_char - 1; | |
5709 | ||
5710 | while (pos < pos_end) | |
5711 | { | |
5712 | p = BYTE_POS_ADDR (pos_byte); | |
5713 | if (*p == '\r' && p[1] == '\n') | |
5714 | { | |
5715 | del_range_2 (pos, pos_byte, pos + 1, pos_byte + 1, 0); | |
5716 | n++; | |
5717 | pos_end--; | |
5718 | } | |
5719 | pos++; | |
69b8522d KH |
5720 | if (coding->dst_multibyte) |
5721 | pos_byte += BYTES_BY_CHAR_HEAD (*p); | |
5722 | else | |
5723 | pos_byte++; | |
4347441b | 5724 | } |
24a73b0a KH |
5725 | } |
5726 | coding->produced -= n; | |
5727 | coding->produced_char -= n; | |
aaaf0b1e | 5728 | } |
4ed46869 KH |
5729 | } |
5730 | ||
7d64c6ad | 5731 | |
a6f87d34 KH |
5732 | /* Return a translation table (or list of them) from coding system |
5733 | attribute vector ATTRS for encoding (ENCODEP is nonzero) or | |
5734 | decoding (ENCODEP is zero). */ | |
7d64c6ad | 5735 | |
e6a54062 | 5736 | static Lisp_Object |
09ee6fdd KH |
5737 | get_translation_table (attrs, encodep, max_lookup) |
5738 | Lisp_Object attrs; | |
5739 | int encodep, *max_lookup; | |
7d64c6ad KH |
5740 | { |
5741 | Lisp_Object standard, translation_table; | |
09ee6fdd | 5742 | Lisp_Object val; |
7d64c6ad KH |
5743 | |
5744 | if (encodep) | |
5745 | translation_table = CODING_ATTR_ENCODE_TBL (attrs), | |
5746 | standard = Vstandard_translation_table_for_encode; | |
5747 | else | |
5748 | translation_table = CODING_ATTR_DECODE_TBL (attrs), | |
5749 | standard = Vstandard_translation_table_for_decode; | |
7d64c6ad | 5750 | if (NILP (translation_table)) |
09ee6fdd KH |
5751 | translation_table = standard; |
5752 | else | |
a6f87d34 | 5753 | { |
09ee6fdd KH |
5754 | if (SYMBOLP (translation_table)) |
5755 | translation_table = Fget (translation_table, Qtranslation_table); | |
5756 | else if (CONSP (translation_table)) | |
5757 | { | |
5758 | translation_table = Fcopy_sequence (translation_table); | |
5759 | for (val = translation_table; CONSP (val); val = XCDR (val)) | |
5760 | if (SYMBOLP (XCAR (val))) | |
5761 | XSETCAR (val, Fget (XCAR (val), Qtranslation_table)); | |
5762 | } | |
5763 | if (CHAR_TABLE_P (standard)) | |
5764 | { | |
5765 | if (CONSP (translation_table)) | |
5766 | translation_table = nconc2 (translation_table, | |
5767 | Fcons (standard, Qnil)); | |
5768 | else | |
5769 | translation_table = Fcons (translation_table, | |
5770 | Fcons (standard, Qnil)); | |
5771 | } | |
a6f87d34 | 5772 | } |
2170c8f0 KH |
5773 | |
5774 | if (max_lookup) | |
09ee6fdd | 5775 | { |
2170c8f0 KH |
5776 | *max_lookup = 1; |
5777 | if (CHAR_TABLE_P (translation_table) | |
5778 | && CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (translation_table)) > 1) | |
5779 | { | |
5780 | val = XCHAR_TABLE (translation_table)->extras[1]; | |
5781 | if (NATNUMP (val) && *max_lookup < XFASTINT (val)) | |
5782 | *max_lookup = XFASTINT (val); | |
5783 | } | |
5784 | else if (CONSP (translation_table)) | |
5785 | { | |
5786 | Lisp_Object tail, val; | |
09ee6fdd | 5787 | |
2170c8f0 KH |
5788 | for (tail = translation_table; CONSP (tail); tail = XCDR (tail)) |
5789 | if (CHAR_TABLE_P (XCAR (tail)) | |
5790 | && CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (XCAR (tail))) > 1) | |
5791 | { | |
5792 | val = XCHAR_TABLE (XCAR (tail))->extras[1]; | |
5793 | if (NATNUMP (val) && *max_lookup < XFASTINT (val)) | |
5794 | *max_lookup = XFASTINT (val); | |
5795 | } | |
5796 | } | |
a6f87d34 | 5797 | } |
7d64c6ad KH |
5798 | return translation_table; |
5799 | } | |
5800 | ||
09ee6fdd KH |
5801 | #define LOOKUP_TRANSLATION_TABLE(table, c, trans) \ |
5802 | do { \ | |
5803 | trans = Qnil; \ | |
5804 | if (CHAR_TABLE_P (table)) \ | |
5805 | { \ | |
5806 | trans = CHAR_TABLE_REF (table, c); \ | |
5807 | if (CHARACTERP (trans)) \ | |
5808 | c = XFASTINT (trans), trans = Qnil; \ | |
5809 | } \ | |
5810 | else if (CONSP (table)) \ | |
5811 | { \ | |
5812 | Lisp_Object tail; \ | |
5813 | \ | |
5814 | for (tail = table; CONSP (tail); tail = XCDR (tail)) \ | |
5815 | if (CHAR_TABLE_P (XCAR (tail))) \ | |
5816 | { \ | |
5817 | trans = CHAR_TABLE_REF (XCAR (tail), c); \ | |
5818 | if (CHARACTERP (trans)) \ | |
5819 | c = XFASTINT (trans), trans = Qnil; \ | |
5820 | else if (! NILP (trans)) \ | |
5821 | break; \ | |
5822 | } \ | |
5823 | } \ | |
e6a54062 KH |
5824 | } while (0) |
5825 | ||
7d64c6ad | 5826 | |
69a80ea3 KH |
5827 | static Lisp_Object |
5828 | get_translation (val, buf, buf_end, last_block, from_nchars, to_nchars) | |
5829 | Lisp_Object val; | |
5830 | int *buf, *buf_end; | |
5831 | int last_block; | |
5832 | int *from_nchars, *to_nchars; | |
5833 | { | |
433f7f87 KH |
5834 | /* VAL is TO or (([FROM-CHAR ...] . TO) ...) where TO is TO-CHAR or |
5835 | [TO-CHAR ...]. */ | |
69a80ea3 KH |
5836 | if (CONSP (val)) |
5837 | { | |
433f7f87 | 5838 | Lisp_Object from, tail; |
69a80ea3 KH |
5839 | int i, len; |
5840 | ||
433f7f87 | 5841 | for (tail = val; CONSP (tail); tail = XCDR (tail)) |
69a80ea3 | 5842 | { |
433f7f87 KH |
5843 | val = XCAR (tail); |
5844 | from = XCAR (val); | |
5845 | len = ASIZE (from); | |
5846 | for (i = 0; i < len; i++) | |
5847 | { | |
5848 | if (buf + i == buf_end) | |
5849 | { | |
5850 | if (! last_block) | |
5851 | return Qt; | |
5852 | break; | |
5853 | } | |
5854 | if (XINT (AREF (from, i)) != buf[i]) | |
5855 | break; | |
5856 | } | |
5857 | if (i == len) | |
5858 | { | |
5859 | val = XCDR (val); | |
5860 | *from_nchars = len; | |
5861 | break; | |
5862 | } | |
69a80ea3 | 5863 | } |
433f7f87 KH |
5864 | if (! CONSP (tail)) |
5865 | return Qnil; | |
69a80ea3 KH |
5866 | } |
5867 | if (VECTORP (val)) | |
5868 | *buf = XINT (AREF (val, 0)), *to_nchars = ASIZE (val); | |
5869 | else | |
5870 | *buf = XINT (val); | |
5871 | return val; | |
5872 | } | |
5873 | ||
5874 | ||
d46c5b12 | 5875 | static int |
69a80ea3 | 5876 | produce_chars (coding, translation_table, last_block) |
df7492f9 | 5877 | struct coding_system *coding; |
69a80ea3 KH |
5878 | Lisp_Object translation_table; |
5879 | int last_block; | |
4ed46869 | 5880 | { |
df7492f9 KH |
5881 | unsigned char *dst = coding->destination + coding->produced; |
5882 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
5883 | int produced; | |
5884 | int produced_chars = 0; | |
69a80ea3 | 5885 | int carryover = 0; |
4ed46869 | 5886 | |
df7492f9 | 5887 | if (! coding->chars_at_source) |
4ed46869 | 5888 | { |
df7492f9 | 5889 | /* Characters are in coding->charbuf. */ |
fba4576f AS |
5890 | int *buf = coding->charbuf; |
5891 | int *buf_end = buf + coding->charbuf_used; | |
4ed46869 | 5892 | |
df7492f9 KH |
5893 | if (BUFFERP (coding->src_object) |
5894 | && EQ (coding->src_object, coding->dst_object)) | |
8f924df7 | 5895 | dst_end = ((unsigned char *) coding->source) + coding->consumed; |
4ed46869 | 5896 | |
df7492f9 | 5897 | while (buf < buf_end) |
4ed46869 | 5898 | { |
69a80ea3 | 5899 | int c = *buf, i; |
bc4bc72a | 5900 | |
df7492f9 KH |
5901 | if (c >= 0) |
5902 | { | |
69a80ea3 KH |
5903 | int from_nchars = 1, to_nchars = 1; |
5904 | Lisp_Object trans = Qnil; | |
5905 | ||
09ee6fdd | 5906 | LOOKUP_TRANSLATION_TABLE (translation_table, c, trans); |
e6a54062 | 5907 | if (! NILP (trans)) |
69a80ea3 KH |
5908 | { |
5909 | trans = get_translation (trans, buf, buf_end, last_block, | |
5910 | &from_nchars, &to_nchars); | |
5911 | if (EQ (trans, Qt)) | |
5912 | break; | |
5913 | c = *buf; | |
5914 | } | |
5915 | ||
5916 | if (dst + MAX_MULTIBYTE_LENGTH * to_nchars > dst_end) | |
5917 | { | |
5918 | dst = alloc_destination (coding, | |
5919 | buf_end - buf | |
5920 | + MAX_MULTIBYTE_LENGTH * to_nchars, | |
5921 | dst); | |
5922 | dst_end = coding->destination + coding->dst_bytes; | |
5923 | } | |
5924 | ||
433f7f87 | 5925 | for (i = 0; i < to_nchars; i++) |
69a80ea3 | 5926 | { |
433f7f87 KH |
5927 | if (i > 0) |
5928 | c = XINT (AREF (trans, i)); | |
69a80ea3 KH |
5929 | if (coding->dst_multibyte |
5930 | || ! CHAR_BYTE8_P (c)) | |
5931 | CHAR_STRING_ADVANCE (c, dst); | |
5932 | else | |
5933 | *dst++ = CHAR_TO_BYTE8 (c); | |
5934 | } | |
5935 | produced_chars += to_nchars; | |
5936 | *buf++ = to_nchars; | |
5937 | while (--from_nchars > 0) | |
5938 | *buf++ = 0; | |
d46c5b12 | 5939 | } |
df7492f9 | 5940 | else |
69a80ea3 KH |
5941 | /* This is an annotation datum. (-C) is the length. */ |
5942 | buf += -c; | |
4ed46869 | 5943 | } |
69a80ea3 | 5944 | carryover = buf_end - buf; |
4ed46869 | 5945 | } |
fa42c37f | 5946 | else |
fa42c37f | 5947 | { |
8f924df7 KH |
5948 | const unsigned char *src = coding->source; |
5949 | const unsigned char *src_end = src + coding->src_bytes; | |
df7492f9 | 5950 | Lisp_Object eol_type; |
fa42c37f | 5951 | |
df7492f9 | 5952 | eol_type = CODING_ID_EOL_TYPE (coding->id); |
4ed46869 | 5953 | |
df7492f9 | 5954 | if (coding->src_multibyte != coding->dst_multibyte) |
fa42c37f | 5955 | { |
df7492f9 | 5956 | if (coding->src_multibyte) |
fa42c37f | 5957 | { |
71c81426 | 5958 | int multibytep = 1; |
df7492f9 | 5959 | int consumed_chars; |
d46c5b12 | 5960 | |
df7492f9 KH |
5961 | while (1) |
5962 | { | |
8f924df7 | 5963 | const unsigned char *src_base = src; |
df7492f9 | 5964 | int c; |
b73bfc1c | 5965 | |
df7492f9 KH |
5966 | ONE_MORE_BYTE (c); |
5967 | if (c == '\r') | |
5968 | { | |
5969 | if (EQ (eol_type, Qdos)) | |
5970 | { | |
98725083 KH |
5971 | if (src == src_end) |
5972 | { | |
065e3595 KH |
5973 | record_conversion_result |
5974 | (coding, CODING_RESULT_INSUFFICIENT_SRC); | |
98725083 KH |
5975 | goto no_more_source; |
5976 | } | |
5977 | if (*src == '\n') | |
df7492f9 KH |
5978 | c = *src++; |
5979 | } | |
5980 | else if (EQ (eol_type, Qmac)) | |
5981 | c = '\n'; | |
5982 | } | |
5983 | if (dst == dst_end) | |
5984 | { | |
2c78b7e1 | 5985 | coding->consumed = src - coding->source; |
b73bfc1c | 5986 | |
2c78b7e1 | 5987 | if (EQ (coding->src_object, coding->dst_object)) |
8f924df7 | 5988 | dst_end = (unsigned char *) src; |
2c78b7e1 KH |
5989 | if (dst == dst_end) |
5990 | { | |
5991 | dst = alloc_destination (coding, src_end - src + 1, | |
5992 | dst); | |
5993 | dst_end = coding->destination + coding->dst_bytes; | |
5994 | coding_set_source (coding); | |
5995 | src = coding->source + coding->consumed; | |
5996 | src_end = coding->source + coding->src_bytes; | |
5997 | } | |
df7492f9 KH |
5998 | } |
5999 | *dst++ = c; | |
6000 | produced_chars++; | |
6001 | } | |
6002 | no_more_source: | |
6003 | ; | |
fa42c37f KH |
6004 | } |
6005 | else | |
df7492f9 KH |
6006 | while (src < src_end) |
6007 | { | |
71c81426 | 6008 | int multibytep = 1; |
df7492f9 | 6009 | int c = *src++; |
b73bfc1c | 6010 | |
df7492f9 KH |
6011 | if (c == '\r') |
6012 | { | |
6013 | if (EQ (eol_type, Qdos)) | |
6014 | { | |
6015 | if (src < src_end | |
6016 | && *src == '\n') | |
6017 | c = *src++; | |
6018 | } | |
6019 | else if (EQ (eol_type, Qmac)) | |
6020 | c = '\n'; | |
6021 | } | |
6022 | if (dst >= dst_end - 1) | |
6023 | { | |
2c78b7e1 | 6024 | coding->consumed = src - coding->source; |
df7492f9 | 6025 | |
2c78b7e1 | 6026 | if (EQ (coding->src_object, coding->dst_object)) |
8f924df7 | 6027 | dst_end = (unsigned char *) src; |
2c78b7e1 KH |
6028 | if (dst >= dst_end - 1) |
6029 | { | |
6030 | dst = alloc_destination (coding, src_end - src + 2, | |
6031 | dst); | |
6032 | dst_end = coding->destination + coding->dst_bytes; | |
6033 | coding_set_source (coding); | |
6034 | src = coding->source + coding->consumed; | |
6035 | src_end = coding->source + coding->src_bytes; | |
6036 | } | |
df7492f9 KH |
6037 | } |
6038 | EMIT_ONE_BYTE (c); | |
6039 | } | |
d46c5b12 | 6040 | } |
df7492f9 KH |
6041 | else |
6042 | { | |
6043 | if (!EQ (coding->src_object, coding->dst_object)) | |
fa42c37f | 6044 | { |
df7492f9 | 6045 | int require = coding->src_bytes - coding->dst_bytes; |
4ed46869 | 6046 | |
df7492f9 | 6047 | if (require > 0) |
fa42c37f | 6048 | { |
df7492f9 KH |
6049 | EMACS_INT offset = src - coding->source; |
6050 | ||
6051 | dst = alloc_destination (coding, require, dst); | |
6052 | coding_set_source (coding); | |
6053 | src = coding->source + offset; | |
6054 | src_end = coding->source + coding->src_bytes; | |
fa42c37f KH |
6055 | } |
6056 | } | |
df7492f9 KH |
6057 | produced_chars = coding->src_chars; |
6058 | while (src < src_end) | |
fa42c37f | 6059 | { |
df7492f9 KH |
6060 | int c = *src++; |
6061 | ||
6062 | if (c == '\r') | |
6063 | { | |
6064 | if (EQ (eol_type, Qdos)) | |
6065 | { | |
6066 | if (src < src_end | |
6067 | && *src == '\n') | |
6068 | c = *src++; | |
6069 | produced_chars--; | |
6070 | } | |
6071 | else if (EQ (eol_type, Qmac)) | |
6072 | c = '\n'; | |
6073 | } | |
6074 | *dst++ = c; | |
fa42c37f KH |
6075 | } |
6076 | } | |
2c78b7e1 KH |
6077 | coding->consumed = coding->src_bytes; |
6078 | coding->consumed_char = coding->src_chars; | |
fa42c37f KH |
6079 | } |
6080 | ||
df7492f9 | 6081 | produced = dst - (coding->destination + coding->produced); |
284201e4 | 6082 | if (BUFFERP (coding->dst_object) && produced_chars > 0) |
df7492f9 KH |
6083 | insert_from_gap (produced_chars, produced); |
6084 | coding->produced += produced; | |
6085 | coding->produced_char += produced_chars; | |
69a80ea3 | 6086 | return carryover; |
fa42c37f KH |
6087 | } |
6088 | ||
ff0dacd7 KH |
6089 | /* Compose text in CODING->object according to the annotation data at |
6090 | CHARBUF. CHARBUF is an array: | |
6091 | [ -LENGTH ANNOTATION_MASK FROM TO METHOD COMP_LEN [ COMPONENTS... ] ] | |
df7492f9 | 6092 | */ |
4ed46869 | 6093 | |
df7492f9 | 6094 | static INLINE void |
69a80ea3 | 6095 | produce_composition (coding, charbuf, pos) |
4ed46869 | 6096 | struct coding_system *coding; |
df7492f9 | 6097 | int *charbuf; |
69a80ea3 | 6098 | EMACS_INT pos; |
4ed46869 | 6099 | { |
df7492f9 | 6100 | int len; |
69a80ea3 | 6101 | EMACS_INT to; |
df7492f9 | 6102 | enum composition_method method; |
df7492f9 | 6103 | Lisp_Object components; |
fa42c37f | 6104 | |
df7492f9 | 6105 | len = -charbuf[0]; |
69a80ea3 | 6106 | to = pos + charbuf[2]; |
9ffd559c KH |
6107 | if (to <= pos) |
6108 | return; | |
69a80ea3 | 6109 | method = (enum composition_method) (charbuf[3]); |
d46c5b12 | 6110 | |
df7492f9 KH |
6111 | if (method == COMPOSITION_RELATIVE) |
6112 | components = Qnil; | |
9ffd559c KH |
6113 | else if (method >= COMPOSITION_WITH_RULE |
6114 | && method <= COMPOSITION_WITH_RULE_ALTCHARS) | |
d46c5b12 | 6115 | { |
df7492f9 KH |
6116 | Lisp_Object args[MAX_COMPOSITION_COMPONENTS * 2 - 1]; |
6117 | int i; | |
b73bfc1c | 6118 | |
69a80ea3 KH |
6119 | len -= 4; |
6120 | charbuf += 4; | |
df7492f9 | 6121 | for (i = 0; i < len; i++) |
9ffd559c KH |
6122 | { |
6123 | args[i] = make_number (charbuf[i]); | |
f75c90a9 | 6124 | if (charbuf[i] < 0) |
9ffd559c KH |
6125 | return; |
6126 | } | |
df7492f9 KH |
6127 | components = (method == COMPOSITION_WITH_ALTCHARS |
6128 | ? Fstring (len, args) : Fvector (len, args)); | |
d46c5b12 | 6129 | } |
9ffd559c KH |
6130 | else |
6131 | return; | |
69a80ea3 | 6132 | compose_text (pos, to, components, Qnil, coding->dst_object); |
d46c5b12 KH |
6133 | } |
6134 | ||
d46c5b12 | 6135 | |
ff0dacd7 KH |
6136 | /* Put `charset' property on text in CODING->object according to |
6137 | the annotation data at CHARBUF. CHARBUF is an array: | |
69a80ea3 | 6138 | [ -LENGTH ANNOTATION_MASK NCHARS CHARSET-ID ] |
ff0dacd7 | 6139 | */ |
d46c5b12 | 6140 | |
ff0dacd7 | 6141 | static INLINE void |
69a80ea3 | 6142 | produce_charset (coding, charbuf, pos) |
d46c5b12 | 6143 | struct coding_system *coding; |
ff0dacd7 | 6144 | int *charbuf; |
69a80ea3 | 6145 | EMACS_INT pos; |
d46c5b12 | 6146 | { |
69a80ea3 KH |
6147 | EMACS_INT from = pos - charbuf[2]; |
6148 | struct charset *charset = CHARSET_FROM_ID (charbuf[3]); | |
b73bfc1c | 6149 | |
69a80ea3 | 6150 | Fput_text_property (make_number (from), make_number (pos), |
ff0dacd7 KH |
6151 | Qcharset, CHARSET_NAME (charset), |
6152 | coding->dst_object); | |
d46c5b12 KH |
6153 | } |
6154 | ||
d46c5b12 | 6155 | |
df7492f9 KH |
6156 | #define CHARBUF_SIZE 0x4000 |
6157 | ||
6158 | #define ALLOC_CONVERSION_WORK_AREA(coding) \ | |
6159 | do { \ | |
6160 | int size = CHARBUF_SIZE;; \ | |
6161 | \ | |
6162 | coding->charbuf = NULL; \ | |
6163 | while (size > 1024) \ | |
6164 | { \ | |
6165 | coding->charbuf = (int *) alloca (sizeof (int) * size); \ | |
6166 | if (coding->charbuf) \ | |
6167 | break; \ | |
6168 | size >>= 1; \ | |
6169 | } \ | |
6170 | if (! coding->charbuf) \ | |
6171 | { \ | |
065e3595 | 6172 | record_conversion_result (coding, CODING_RESULT_INSUFFICIENT_MEM); \ |
df7492f9 KH |
6173 | return coding->result; \ |
6174 | } \ | |
6175 | coding->charbuf_size = size; \ | |
6176 | } while (0) | |
4ed46869 | 6177 | |
d46c5b12 KH |
6178 | |
6179 | static void | |
69a80ea3 | 6180 | produce_annotation (coding, pos) |
d46c5b12 | 6181 | struct coding_system *coding; |
69a80ea3 | 6182 | EMACS_INT pos; |
d46c5b12 | 6183 | { |
df7492f9 KH |
6184 | int *charbuf = coding->charbuf; |
6185 | int *charbuf_end = charbuf + coding->charbuf_used; | |
d46c5b12 | 6186 | |
ff0dacd7 KH |
6187 | if (NILP (coding->dst_object)) |
6188 | return; | |
d46c5b12 | 6189 | |
df7492f9 | 6190 | while (charbuf < charbuf_end) |
a84f1519 | 6191 | { |
df7492f9 | 6192 | if (*charbuf >= 0) |
69a80ea3 | 6193 | pos += *charbuf++; |
d46c5b12 | 6194 | else |
d46c5b12 | 6195 | { |
df7492f9 | 6196 | int len = -*charbuf; |
ff0dacd7 | 6197 | switch (charbuf[1]) |
df7492f9 KH |
6198 | { |
6199 | case CODING_ANNOTATE_COMPOSITION_MASK: | |
69a80ea3 | 6200 | produce_composition (coding, charbuf, pos); |
df7492f9 | 6201 | break; |
ff0dacd7 | 6202 | case CODING_ANNOTATE_CHARSET_MASK: |
69a80ea3 | 6203 | produce_charset (coding, charbuf, pos); |
ff0dacd7 | 6204 | break; |
df7492f9 KH |
6205 | default: |
6206 | abort (); | |
6207 | } | |
6208 | charbuf += len; | |
d46c5b12 | 6209 | } |
a84f1519 | 6210 | } |
d46c5b12 KH |
6211 | } |
6212 | ||
df7492f9 KH |
6213 | /* Decode the data at CODING->src_object into CODING->dst_object. |
6214 | CODING->src_object is a buffer, a string, or nil. | |
6215 | CODING->dst_object is a buffer. | |
d46c5b12 | 6216 | |
df7492f9 KH |
6217 | If CODING->src_object is a buffer, it must be the current buffer. |
6218 | In this case, if CODING->src_pos is positive, it is a position of | |
6219 | the source text in the buffer, otherwise, the source text is in the | |
6220 | gap area of the buffer, and CODING->src_pos specifies the offset of | |
6221 | the text from GPT (which must be the same as PT). If this is the | |
6222 | same buffer as CODING->dst_object, CODING->src_pos must be | |
6223 | negative. | |
d46c5b12 | 6224 | |
b6828792 | 6225 | If CODING->src_object is a string, CODING->src_pos is an index to |
df7492f9 | 6226 | that string. |
d46c5b12 | 6227 | |
df7492f9 KH |
6228 | If CODING->src_object is nil, CODING->source must already point to |
6229 | the non-relocatable memory area. In this case, CODING->src_pos is | |
6230 | an offset from CODING->source. | |
73be902c | 6231 | |
df7492f9 KH |
6232 | The decoded data is inserted at the current point of the buffer |
6233 | CODING->dst_object. | |
6234 | */ | |
d46c5b12 | 6235 | |
df7492f9 KH |
6236 | static int |
6237 | decode_coding (coding) | |
d46c5b12 | 6238 | struct coding_system *coding; |
d46c5b12 | 6239 | { |
df7492f9 | 6240 | Lisp_Object attrs; |
24a73b0a | 6241 | Lisp_Object undo_list; |
7d64c6ad | 6242 | Lisp_Object translation_table; |
69a80ea3 KH |
6243 | int carryover; |
6244 | int i; | |
d46c5b12 | 6245 | |
df7492f9 KH |
6246 | if (BUFFERP (coding->src_object) |
6247 | && coding->src_pos > 0 | |
6248 | && coding->src_pos < GPT | |
6249 | && coding->src_pos + coding->src_chars > GPT) | |
6250 | move_gap_both (coding->src_pos, coding->src_pos_byte); | |
d46c5b12 | 6251 | |
24a73b0a | 6252 | undo_list = Qt; |
df7492f9 | 6253 | if (BUFFERP (coding->dst_object)) |
1c3478b0 | 6254 | { |
df7492f9 KH |
6255 | if (current_buffer != XBUFFER (coding->dst_object)) |
6256 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
6257 | if (GPT != PT) | |
6258 | move_gap_both (PT, PT_BYTE); | |
24a73b0a KH |
6259 | undo_list = current_buffer->undo_list; |
6260 | current_buffer->undo_list = Qt; | |
1c3478b0 KH |
6261 | } |
6262 | ||
df7492f9 KH |
6263 | coding->consumed = coding->consumed_char = 0; |
6264 | coding->produced = coding->produced_char = 0; | |
6265 | coding->chars_at_source = 0; | |
065e3595 | 6266 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 | 6267 | coding->errors = 0; |
1c3478b0 | 6268 | |
df7492f9 KH |
6269 | ALLOC_CONVERSION_WORK_AREA (coding); |
6270 | ||
6271 | attrs = CODING_ID_ATTRS (coding->id); | |
2170c8f0 | 6272 | translation_table = get_translation_table (attrs, 0, NULL); |
df7492f9 | 6273 | |
69a80ea3 | 6274 | carryover = 0; |
df7492f9 | 6275 | do |
b73bfc1c | 6276 | { |
69a80ea3 KH |
6277 | EMACS_INT pos = coding->dst_pos + coding->produced_char; |
6278 | ||
df7492f9 KH |
6279 | coding_set_source (coding); |
6280 | coding->annotated = 0; | |
69a80ea3 | 6281 | coding->charbuf_used = carryover; |
df7492f9 | 6282 | (*(coding->decoder)) (coding); |
df7492f9 | 6283 | coding_set_destination (coding); |
69a80ea3 | 6284 | carryover = produce_chars (coding, translation_table, 0); |
df7492f9 | 6285 | if (coding->annotated) |
69a80ea3 KH |
6286 | produce_annotation (coding, pos); |
6287 | for (i = 0; i < carryover; i++) | |
6288 | coding->charbuf[i] | |
6289 | = coding->charbuf[coding->charbuf_used - carryover + i]; | |
d46c5b12 | 6290 | } |
df7492f9 | 6291 | while (coding->consumed < coding->src_bytes |
54b367bb KH |
6292 | && (coding->result == CODING_RESULT_SUCCESS |
6293 | || coding->result == CODING_RESULT_INVALID_SRC)); | |
d46c5b12 | 6294 | |
69a80ea3 KH |
6295 | if (carryover > 0) |
6296 | { | |
6297 | coding_set_destination (coding); | |
6298 | coding->charbuf_used = carryover; | |
6299 | produce_chars (coding, translation_table, 1); | |
6300 | } | |
6301 | ||
df7492f9 KH |
6302 | coding->carryover_bytes = 0; |
6303 | if (coding->consumed < coding->src_bytes) | |
d46c5b12 | 6304 | { |
df7492f9 | 6305 | int nbytes = coding->src_bytes - coding->consumed; |
8f924df7 | 6306 | const unsigned char *src; |
df7492f9 KH |
6307 | |
6308 | coding_set_source (coding); | |
6309 | coding_set_destination (coding); | |
6310 | src = coding->source + coding->consumed; | |
6311 | ||
6312 | if (coding->mode & CODING_MODE_LAST_BLOCK) | |
1c3478b0 | 6313 | { |
df7492f9 KH |
6314 | /* Flush out unprocessed data as binary chars. We are sure |
6315 | that the number of data is less than the size of | |
6316 | coding->charbuf. */ | |
065e3595 | 6317 | coding->charbuf_used = 0; |
df7492f9 | 6318 | while (nbytes-- > 0) |
1c3478b0 | 6319 | { |
df7492f9 | 6320 | int c = *src++; |
98725083 | 6321 | |
1c91457d KH |
6322 | if (c & 0x80) |
6323 | c = BYTE8_TO_CHAR (c); | |
6324 | coding->charbuf[coding->charbuf_used++] = c; | |
1c3478b0 | 6325 | } |
f6cbaf43 | 6326 | produce_chars (coding, Qnil, 1); |
d46c5b12 | 6327 | } |
d46c5b12 | 6328 | else |
df7492f9 KH |
6329 | { |
6330 | /* Record unprocessed bytes in coding->carryover. We are | |
6331 | sure that the number of data is less than the size of | |
6332 | coding->carryover. */ | |
6333 | unsigned char *p = coding->carryover; | |
6334 | ||
6335 | coding->carryover_bytes = nbytes; | |
6336 | while (nbytes-- > 0) | |
6337 | *p++ = *src++; | |
1c3478b0 | 6338 | } |
df7492f9 | 6339 | coding->consumed = coding->src_bytes; |
b73bfc1c | 6340 | } |
69f76525 | 6341 | |
4347441b KH |
6342 | if (! EQ (CODING_ID_EOL_TYPE (coding->id), Qunix)) |
6343 | decode_eol (coding); | |
24a73b0a KH |
6344 | if (BUFFERP (coding->dst_object)) |
6345 | { | |
6346 | current_buffer->undo_list = undo_list; | |
6347 | record_insert (coding->dst_pos, coding->produced_char); | |
6348 | } | |
73be902c | 6349 | return coding->result; |
4ed46869 KH |
6350 | } |
6351 | ||
aaaf0b1e | 6352 | |
e1c23804 | 6353 | /* Extract an annotation datum from a composition starting at POS and |
ff0dacd7 KH |
6354 | ending before LIMIT of CODING->src_object (buffer or string), store |
6355 | the data in BUF, set *STOP to a starting position of the next | |
6356 | composition (if any) or to LIMIT, and return the address of the | |
6357 | next element of BUF. | |
6358 | ||
6359 | If such an annotation is not found, set *STOP to a starting | |
6360 | position of a composition after POS (if any) or to LIMIT, and | |
6361 | return BUF. */ | |
6362 | ||
6363 | static INLINE int * | |
6364 | handle_composition_annotation (pos, limit, coding, buf, stop) | |
6365 | EMACS_INT pos, limit; | |
aaaf0b1e | 6366 | struct coding_system *coding; |
ff0dacd7 KH |
6367 | int *buf; |
6368 | EMACS_INT *stop; | |
aaaf0b1e | 6369 | { |
ff0dacd7 KH |
6370 | EMACS_INT start, end; |
6371 | Lisp_Object prop; | |
aaaf0b1e | 6372 | |
ff0dacd7 KH |
6373 | if (! find_composition (pos, limit, &start, &end, &prop, coding->src_object) |
6374 | || end > limit) | |
6375 | *stop = limit; | |
6376 | else if (start > pos) | |
6377 | *stop = start; | |
6378 | else | |
aaaf0b1e | 6379 | { |
ff0dacd7 | 6380 | if (start == pos) |
aaaf0b1e | 6381 | { |
ff0dacd7 KH |
6382 | /* We found a composition. Store the corresponding |
6383 | annotation data in BUF. */ | |
6384 | int *head = buf; | |
6385 | enum composition_method method = COMPOSITION_METHOD (prop); | |
6386 | int nchars = COMPOSITION_LENGTH (prop); | |
6387 | ||
69a80ea3 | 6388 | ADD_COMPOSITION_DATA (buf, nchars, method); |
ff0dacd7 | 6389 | if (method != COMPOSITION_RELATIVE) |
aaaf0b1e | 6390 | { |
ff0dacd7 KH |
6391 | Lisp_Object components; |
6392 | int len, i, i_byte; | |
6393 | ||
6394 | components = COMPOSITION_COMPONENTS (prop); | |
6395 | if (VECTORP (components)) | |
aaaf0b1e | 6396 | { |
ff0dacd7 KH |
6397 | len = XVECTOR (components)->size; |
6398 | for (i = 0; i < len; i++) | |
6399 | *buf++ = XINT (AREF (components, i)); | |
aaaf0b1e | 6400 | } |
ff0dacd7 | 6401 | else if (STRINGP (components)) |
aaaf0b1e | 6402 | { |
8f924df7 | 6403 | len = SCHARS (components); |
ff0dacd7 KH |
6404 | i = i_byte = 0; |
6405 | while (i < len) | |
6406 | { | |
6407 | FETCH_STRING_CHAR_ADVANCE (*buf, components, i, i_byte); | |
6408 | buf++; | |
6409 | } | |
6410 | } | |
6411 | else if (INTEGERP (components)) | |
6412 | { | |
6413 | len = 1; | |
6414 | *buf++ = XINT (components); | |
6415 | } | |
6416 | else if (CONSP (components)) | |
6417 | { | |
6418 | for (len = 0; CONSP (components); | |
6419 | len++, components = XCDR (components)) | |
6420 | *buf++ = XINT (XCAR (components)); | |
aaaf0b1e | 6421 | } |
aaaf0b1e | 6422 | else |
ff0dacd7 KH |
6423 | abort (); |
6424 | *head -= len; | |
aaaf0b1e | 6425 | } |
aaaf0b1e | 6426 | } |
ff0dacd7 KH |
6427 | |
6428 | if (find_composition (end, limit, &start, &end, &prop, | |
6429 | coding->src_object) | |
6430 | && end <= limit) | |
6431 | *stop = start; | |
6432 | else | |
6433 | *stop = limit; | |
aaaf0b1e | 6434 | } |
ff0dacd7 KH |
6435 | return buf; |
6436 | } | |
6437 | ||
6438 | ||
e1c23804 | 6439 | /* Extract an annotation datum from a text property `charset' at POS of |
ff0dacd7 KH |
6440 | CODING->src_object (buffer of string), store the data in BUF, set |
6441 | *STOP to the position where the value of `charset' property changes | |
6442 | (limiting by LIMIT), and return the address of the next element of | |
6443 | BUF. | |
6444 | ||
6445 | If the property value is nil, set *STOP to the position where the | |
6446 | property value is non-nil (limiting by LIMIT), and return BUF. */ | |
6447 | ||
6448 | static INLINE int * | |
6449 | handle_charset_annotation (pos, limit, coding, buf, stop) | |
6450 | EMACS_INT pos, limit; | |
6451 | struct coding_system *coding; | |
6452 | int *buf; | |
6453 | EMACS_INT *stop; | |
6454 | { | |
6455 | Lisp_Object val, next; | |
6456 | int id; | |
6457 | ||
6458 | val = Fget_text_property (make_number (pos), Qcharset, coding->src_object); | |
6459 | if (! NILP (val) && CHARSETP (val)) | |
6460 | id = XINT (CHARSET_SYMBOL_ID (val)); | |
6461 | else | |
6462 | id = -1; | |
69a80ea3 | 6463 | ADD_CHARSET_DATA (buf, 0, id); |
ff0dacd7 KH |
6464 | next = Fnext_single_property_change (make_number (pos), Qcharset, |
6465 | coding->src_object, | |
6466 | make_number (limit)); | |
6467 | *stop = XINT (next); | |
6468 | return buf; | |
6469 | } | |
6470 | ||
6471 | ||
df7492f9 | 6472 | static void |
09ee6fdd | 6473 | consume_chars (coding, translation_table, max_lookup) |
df7492f9 | 6474 | struct coding_system *coding; |
433f7f87 | 6475 | Lisp_Object translation_table; |
09ee6fdd | 6476 | int max_lookup; |
df7492f9 KH |
6477 | { |
6478 | int *buf = coding->charbuf; | |
ff0dacd7 | 6479 | int *buf_end = coding->charbuf + coding->charbuf_size; |
7c78e542 | 6480 | const unsigned char *src = coding->source + coding->consumed; |
4776e638 | 6481 | const unsigned char *src_end = coding->source + coding->src_bytes; |
ff0dacd7 KH |
6482 | EMACS_INT pos = coding->src_pos + coding->consumed_char; |
6483 | EMACS_INT end_pos = coding->src_pos + coding->src_chars; | |
df7492f9 KH |
6484 | int multibytep = coding->src_multibyte; |
6485 | Lisp_Object eol_type; | |
6486 | int c; | |
ff0dacd7 | 6487 | EMACS_INT stop, stop_composition, stop_charset; |
09ee6fdd | 6488 | int *lookup_buf = NULL; |
433f7f87 KH |
6489 | |
6490 | if (! NILP (translation_table)) | |
09ee6fdd | 6491 | lookup_buf = alloca (sizeof (int) * max_lookup); |
88993dfd | 6492 | |
df7492f9 KH |
6493 | eol_type = CODING_ID_EOL_TYPE (coding->id); |
6494 | if (VECTORP (eol_type)) | |
6495 | eol_type = Qunix; | |
88993dfd | 6496 | |
df7492f9 KH |
6497 | /* Note: composition handling is not yet implemented. */ |
6498 | coding->common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
ec6d2bb8 | 6499 | |
0b5670c9 KH |
6500 | if (NILP (coding->src_object)) |
6501 | stop = stop_composition = stop_charset = end_pos; | |
ff0dacd7 | 6502 | else |
0b5670c9 KH |
6503 | { |
6504 | if (coding->common_flags & CODING_ANNOTATE_COMPOSITION_MASK) | |
6505 | stop = stop_composition = pos; | |
6506 | else | |
6507 | stop = stop_composition = end_pos; | |
6508 | if (coding->common_flags & CODING_ANNOTATE_CHARSET_MASK) | |
6509 | stop = stop_charset = pos; | |
6510 | else | |
6511 | stop_charset = end_pos; | |
6512 | } | |
ec6d2bb8 | 6513 | |
24a73b0a | 6514 | /* Compensate for CRLF and conversion. */ |
ff0dacd7 | 6515 | buf_end -= 1 + MAX_ANNOTATION_LENGTH; |
df7492f9 | 6516 | while (buf < buf_end) |
aaaf0b1e | 6517 | { |
433f7f87 KH |
6518 | Lisp_Object trans; |
6519 | ||
df7492f9 | 6520 | if (pos == stop) |
ec6d2bb8 | 6521 | { |
df7492f9 KH |
6522 | if (pos == end_pos) |
6523 | break; | |
ff0dacd7 KH |
6524 | if (pos == stop_composition) |
6525 | buf = handle_composition_annotation (pos, end_pos, coding, | |
6526 | buf, &stop_composition); | |
6527 | if (pos == stop_charset) | |
6528 | buf = handle_charset_annotation (pos, end_pos, coding, | |
6529 | buf, &stop_charset); | |
6530 | stop = (stop_composition < stop_charset | |
6531 | ? stop_composition : stop_charset); | |
df7492f9 KH |
6532 | } |
6533 | ||
6534 | if (! multibytep) | |
4776e638 | 6535 | { |
d3e4cb56 | 6536 | EMACS_INT bytes; |
aaaf0b1e | 6537 | |
ea29edf2 KH |
6538 | if (coding->encoder == encode_coding_raw_text) |
6539 | c = *src++, pos++; | |
6540 | else if ((bytes = MULTIBYTE_LENGTH (src, src_end)) > 0) | |
4776e638 KH |
6541 | c = STRING_CHAR_ADVANCE (src), pos += bytes; |
6542 | else | |
f03caae0 | 6543 | c = BYTE8_TO_CHAR (*src), src++, pos++; |
4776e638 | 6544 | } |
df7492f9 | 6545 | else |
4776e638 | 6546 | c = STRING_CHAR_ADVANCE (src), pos++; |
df7492f9 KH |
6547 | if ((c == '\r') && (coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) |
6548 | c = '\n'; | |
6549 | if (! EQ (eol_type, Qunix)) | |
aaaf0b1e | 6550 | { |
df7492f9 | 6551 | if (c == '\n') |
aaaf0b1e | 6552 | { |
df7492f9 KH |
6553 | if (EQ (eol_type, Qdos)) |
6554 | *buf++ = '\r'; | |
6555 | else | |
6556 | c = '\r'; | |
aaaf0b1e KH |
6557 | } |
6558 | } | |
433f7f87 | 6559 | |
e6a54062 | 6560 | trans = Qnil; |
09ee6fdd | 6561 | LOOKUP_TRANSLATION_TABLE (translation_table, c, trans); |
e6a54062 | 6562 | if (NILP (trans)) |
433f7f87 KH |
6563 | *buf++ = c; |
6564 | else | |
6565 | { | |
6566 | int from_nchars = 1, to_nchars = 1; | |
6567 | int *lookup_buf_end; | |
6568 | const unsigned char *p = src; | |
6569 | int i; | |
6570 | ||
6571 | lookup_buf[0] = c; | |
6572 | for (i = 1; i < max_lookup && p < src_end; i++) | |
6573 | lookup_buf[i] = STRING_CHAR_ADVANCE (p); | |
6574 | lookup_buf_end = lookup_buf + i; | |
6575 | trans = get_translation (trans, lookup_buf, lookup_buf_end, 1, | |
6576 | &from_nchars, &to_nchars); | |
6577 | if (EQ (trans, Qt) | |
6578 | || buf + to_nchars > buf_end) | |
6579 | break; | |
6580 | *buf++ = *lookup_buf; | |
6581 | for (i = 1; i < to_nchars; i++) | |
6582 | *buf++ = XINT (AREF (trans, i)); | |
6583 | for (i = 1; i < from_nchars; i++, pos++) | |
6584 | src += MULTIBYTE_LENGTH_NO_CHECK (src); | |
6585 | } | |
aaaf0b1e | 6586 | } |
ec6d2bb8 | 6587 | |
df7492f9 KH |
6588 | coding->consumed = src - coding->source; |
6589 | coding->consumed_char = pos - coding->src_pos; | |
6590 | coding->charbuf_used = buf - coding->charbuf; | |
6591 | coding->chars_at_source = 0; | |
aaaf0b1e KH |
6592 | } |
6593 | ||
4ed46869 | 6594 | |
df7492f9 KH |
6595 | /* Encode the text at CODING->src_object into CODING->dst_object. |
6596 | CODING->src_object is a buffer or a string. | |
6597 | CODING->dst_object is a buffer or nil. | |
6598 | ||
6599 | If CODING->src_object is a buffer, it must be the current buffer. | |
6600 | In this case, if CODING->src_pos is positive, it is a position of | |
6601 | the source text in the buffer, otherwise. the source text is in the | |
6602 | gap area of the buffer, and coding->src_pos specifies the offset of | |
6603 | the text from GPT (which must be the same as PT). If this is the | |
6604 | same buffer as CODING->dst_object, CODING->src_pos must be | |
6605 | negative and CODING should not have `pre-write-conversion'. | |
6606 | ||
6607 | If CODING->src_object is a string, CODING should not have | |
6608 | `pre-write-conversion'. | |
6609 | ||
6610 | If CODING->dst_object is a buffer, the encoded data is inserted at | |
6611 | the current point of that buffer. | |
6612 | ||
6613 | If CODING->dst_object is nil, the encoded data is placed at the | |
6614 | memory area specified by CODING->destination. */ | |
6615 | ||
6616 | static int | |
6617 | encode_coding (coding) | |
4ed46869 | 6618 | struct coding_system *coding; |
4ed46869 | 6619 | { |
df7492f9 | 6620 | Lisp_Object attrs; |
7d64c6ad | 6621 | Lisp_Object translation_table; |
09ee6fdd | 6622 | int max_lookup; |
9861e777 | 6623 | |
df7492f9 | 6624 | attrs = CODING_ID_ATTRS (coding->id); |
ea29edf2 KH |
6625 | if (coding->encoder == encode_coding_raw_text) |
6626 | translation_table = Qnil, max_lookup = 0; | |
6627 | else | |
6628 | translation_table = get_translation_table (attrs, 1, &max_lookup); | |
4ed46869 | 6629 | |
df7492f9 | 6630 | if (BUFFERP (coding->dst_object)) |
8844fa83 | 6631 | { |
df7492f9 KH |
6632 | set_buffer_internal (XBUFFER (coding->dst_object)); |
6633 | coding->dst_multibyte | |
6634 | = ! NILP (current_buffer->enable_multibyte_characters); | |
8844fa83 | 6635 | } |
4ed46869 | 6636 | |
b73bfc1c | 6637 | coding->consumed = coding->consumed_char = 0; |
df7492f9 | 6638 | coding->produced = coding->produced_char = 0; |
065e3595 | 6639 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
b73bfc1c | 6640 | coding->errors = 0; |
b73bfc1c | 6641 | |
df7492f9 | 6642 | ALLOC_CONVERSION_WORK_AREA (coding); |
4ed46869 | 6643 | |
df7492f9 KH |
6644 | do { |
6645 | coding_set_source (coding); | |
09ee6fdd | 6646 | consume_chars (coding, translation_table, max_lookup); |
df7492f9 KH |
6647 | coding_set_destination (coding); |
6648 | (*(coding->encoder)) (coding); | |
6649 | } while (coding->consumed_char < coding->src_chars); | |
6650 | ||
284201e4 | 6651 | if (BUFFERP (coding->dst_object) && coding->produced_char > 0) |
df7492f9 KH |
6652 | insert_from_gap (coding->produced_char, coding->produced); |
6653 | ||
6654 | return (coding->result); | |
ec6d2bb8 KH |
6655 | } |
6656 | ||
fb88bf2d | 6657 | |
24a73b0a KH |
6658 | /* Name (or base name) of work buffer for code conversion. */ |
6659 | static Lisp_Object Vcode_conversion_workbuf_name; | |
d46c5b12 | 6660 | |
24a73b0a KH |
6661 | /* A working buffer used by the top level conversion. Once it is |
6662 | created, it is never destroyed. It has the name | |
6663 | Vcode_conversion_workbuf_name. The other working buffers are | |
6664 | destroyed after the use is finished, and their names are modified | |
6665 | versions of Vcode_conversion_workbuf_name. */ | |
6666 | static Lisp_Object Vcode_conversion_reused_workbuf; | |
b73bfc1c | 6667 | |
24a73b0a KH |
6668 | /* 1 iff Vcode_conversion_reused_workbuf is already in use. */ |
6669 | static int reused_workbuf_in_use; | |
4ed46869 | 6670 | |
24a73b0a KH |
6671 | |
6672 | /* Return a working buffer of code convesion. MULTIBYTE specifies the | |
6673 | multibyteness of returning buffer. */ | |
b73bfc1c | 6674 | |
f6cbaf43 | 6675 | static Lisp_Object |
24a73b0a | 6676 | make_conversion_work_buffer (multibyte) |
f6cbaf43 | 6677 | int multibyte; |
df7492f9 | 6678 | { |
24a73b0a KH |
6679 | Lisp_Object name, workbuf; |
6680 | struct buffer *current; | |
4ed46869 | 6681 | |
24a73b0a | 6682 | if (reused_workbuf_in_use++) |
065e3595 KH |
6683 | { |
6684 | name = Fgenerate_new_buffer_name (Vcode_conversion_workbuf_name, Qnil); | |
6685 | workbuf = Fget_buffer_create (name); | |
6686 | } | |
df7492f9 | 6687 | else |
065e3595 KH |
6688 | { |
6689 | name = Vcode_conversion_workbuf_name; | |
6690 | workbuf = Fget_buffer_create (name); | |
6691 | if (NILP (Vcode_conversion_reused_workbuf)) | |
6692 | Vcode_conversion_reused_workbuf = workbuf; | |
6693 | } | |
24a73b0a KH |
6694 | current = current_buffer; |
6695 | set_buffer_internal (XBUFFER (workbuf)); | |
6696 | Ferase_buffer (); | |
df7492f9 | 6697 | current_buffer->undo_list = Qt; |
24a73b0a | 6698 | current_buffer->enable_multibyte_characters = multibyte ? Qt : Qnil; |
df7492f9 | 6699 | set_buffer_internal (current); |
24a73b0a | 6700 | return workbuf; |
df7492f9 | 6701 | } |
d46c5b12 | 6702 | |
24a73b0a | 6703 | |
4776e638 | 6704 | static Lisp_Object |
24a73b0a KH |
6705 | code_conversion_restore (arg) |
6706 | Lisp_Object arg; | |
4776e638 | 6707 | { |
24a73b0a | 6708 | Lisp_Object current, workbuf; |
948bdcf3 | 6709 | struct gcpro gcpro1; |
24a73b0a | 6710 | |
948bdcf3 | 6711 | GCPRO1 (arg); |
24a73b0a KH |
6712 | current = XCAR (arg); |
6713 | workbuf = XCDR (arg); | |
6714 | if (! NILP (workbuf)) | |
6715 | { | |
6716 | if (EQ (workbuf, Vcode_conversion_reused_workbuf)) | |
6717 | reused_workbuf_in_use = 0; | |
6718 | else if (! NILP (Fbuffer_live_p (workbuf))) | |
6719 | Fkill_buffer (workbuf); | |
6720 | } | |
6721 | set_buffer_internal (XBUFFER (current)); | |
948bdcf3 | 6722 | UNGCPRO; |
4776e638 KH |
6723 | return Qnil; |
6724 | } | |
b73bfc1c | 6725 | |
24a73b0a KH |
6726 | Lisp_Object |
6727 | code_conversion_save (with_work_buf, multibyte) | |
4776e638 | 6728 | int with_work_buf, multibyte; |
df7492f9 | 6729 | { |
24a73b0a | 6730 | Lisp_Object workbuf = Qnil; |
b73bfc1c | 6731 | |
4776e638 | 6732 | if (with_work_buf) |
24a73b0a KH |
6733 | workbuf = make_conversion_work_buffer (multibyte); |
6734 | record_unwind_protect (code_conversion_restore, | |
6735 | Fcons (Fcurrent_buffer (), workbuf)); | |
4776e638 | 6736 | return workbuf; |
df7492f9 | 6737 | } |
d46c5b12 | 6738 | |
df7492f9 KH |
6739 | int |
6740 | decode_coding_gap (coding, chars, bytes) | |
6741 | struct coding_system *coding; | |
6742 | EMACS_INT chars, bytes; | |
6743 | { | |
6744 | int count = specpdl_ptr - specpdl; | |
5e5c78be | 6745 | Lisp_Object attrs; |
fb88bf2d | 6746 | |
24a73b0a | 6747 | code_conversion_save (0, 0); |
ec6d2bb8 | 6748 | |
24a73b0a | 6749 | coding->src_object = Fcurrent_buffer (); |
df7492f9 KH |
6750 | coding->src_chars = chars; |
6751 | coding->src_bytes = bytes; | |
6752 | coding->src_pos = -chars; | |
6753 | coding->src_pos_byte = -bytes; | |
6754 | coding->src_multibyte = chars < bytes; | |
24a73b0a | 6755 | coding->dst_object = coding->src_object; |
df7492f9 KH |
6756 | coding->dst_pos = PT; |
6757 | coding->dst_pos_byte = PT_BYTE; | |
71c81426 | 6758 | coding->dst_multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
4ed46869 | 6759 | |
df7492f9 KH |
6760 | if (CODING_REQUIRE_DETECTION (coding)) |
6761 | detect_coding (coding); | |
8f924df7 | 6762 | |
9286b333 | 6763 | coding->mode |= CODING_MODE_LAST_BLOCK; |
287c57d7 | 6764 | current_buffer->text->inhibit_shrinking = 1; |
df7492f9 | 6765 | decode_coding (coding); |
287c57d7 | 6766 | current_buffer->text->inhibit_shrinking = 0; |
d46c5b12 | 6767 | |
5e5c78be KH |
6768 | attrs = CODING_ID_ATTRS (coding->id); |
6769 | if (! NILP (CODING_ATTR_POST_READ (attrs))) | |
b73bfc1c | 6770 | { |
5e5c78be KH |
6771 | EMACS_INT prev_Z = Z, prev_Z_BYTE = Z_BYTE; |
6772 | Lisp_Object val; | |
6773 | ||
6774 | TEMP_SET_PT_BOTH (coding->dst_pos, coding->dst_pos_byte); | |
5e5c78be KH |
6775 | val = call1 (CODING_ATTR_POST_READ (attrs), |
6776 | make_number (coding->produced_char)); | |
5e5c78be KH |
6777 | CHECK_NATNUM (val); |
6778 | coding->produced_char += Z - prev_Z; | |
6779 | coding->produced += Z_BYTE - prev_Z_BYTE; | |
b73bfc1c | 6780 | } |
4ed46869 | 6781 | |
df7492f9 | 6782 | unbind_to (count, Qnil); |
b73bfc1c KH |
6783 | return coding->result; |
6784 | } | |
52d41803 | 6785 | |
4ed46869 | 6786 | int |
df7492f9 | 6787 | encode_coding_gap (coding, chars, bytes) |
4ed46869 | 6788 | struct coding_system *coding; |
df7492f9 | 6789 | EMACS_INT chars, bytes; |
4ed46869 | 6790 | { |
df7492f9 | 6791 | int count = specpdl_ptr - specpdl; |
4ed46869 | 6792 | |
24a73b0a | 6793 | code_conversion_save (0, 0); |
4ed46869 | 6794 | |
24a73b0a | 6795 | coding->src_object = Fcurrent_buffer (); |
df7492f9 KH |
6796 | coding->src_chars = chars; |
6797 | coding->src_bytes = bytes; | |
6798 | coding->src_pos = -chars; | |
6799 | coding->src_pos_byte = -bytes; | |
6800 | coding->src_multibyte = chars < bytes; | |
6801 | coding->dst_object = coding->src_object; | |
6802 | coding->dst_pos = PT; | |
6803 | coding->dst_pos_byte = PT_BYTE; | |
4ed46869 | 6804 | |
df7492f9 | 6805 | encode_coding (coding); |
b73bfc1c | 6806 | |
df7492f9 KH |
6807 | unbind_to (count, Qnil); |
6808 | return coding->result; | |
6809 | } | |
4ed46869 | 6810 | |
d46c5b12 | 6811 | |
df7492f9 KH |
6812 | /* Decode the text in the range FROM/FROM_BYTE and TO/TO_BYTE in |
6813 | SRC_OBJECT into DST_OBJECT by coding context CODING. | |
b73bfc1c | 6814 | |
df7492f9 | 6815 | SRC_OBJECT is a buffer, a string, or Qnil. |
b73bfc1c | 6816 | |
df7492f9 KH |
6817 | If it is a buffer, the text is at point of the buffer. FROM and TO |
6818 | are positions in the buffer. | |
b73bfc1c | 6819 | |
df7492f9 KH |
6820 | If it is a string, the text is at the beginning of the string. |
6821 | FROM and TO are indices to the string. | |
4ed46869 | 6822 | |
df7492f9 KH |
6823 | If it is nil, the text is at coding->source. FROM and TO are |
6824 | indices to coding->source. | |
bb10be8b | 6825 | |
df7492f9 | 6826 | DST_OBJECT is a buffer, Qt, or Qnil. |
4ed46869 | 6827 | |
df7492f9 KH |
6828 | If it is a buffer, the decoded text is inserted at point of the |
6829 | buffer. If the buffer is the same as SRC_OBJECT, the source text | |
6830 | is deleted. | |
4ed46869 | 6831 | |
df7492f9 KH |
6832 | If it is Qt, a string is made from the decoded text, and |
6833 | set in CODING->dst_object. | |
d46c5b12 | 6834 | |
df7492f9 | 6835 | If it is Qnil, the decoded text is stored at CODING->destination. |
2cb26057 | 6836 | The caller must allocate CODING->dst_bytes bytes at |
df7492f9 KH |
6837 | CODING->destination by xmalloc. If the decoded text is longer than |
6838 | CODING->dst_bytes, CODING->destination is relocated by xrealloc. | |
6839 | */ | |
d46c5b12 | 6840 | |
df7492f9 KH |
6841 | void |
6842 | decode_coding_object (coding, src_object, from, from_byte, to, to_byte, | |
6843 | dst_object) | |
d46c5b12 | 6844 | struct coding_system *coding; |
df7492f9 KH |
6845 | Lisp_Object src_object; |
6846 | EMACS_INT from, from_byte, to, to_byte; | |
6847 | Lisp_Object dst_object; | |
d46c5b12 | 6848 | { |
df7492f9 KH |
6849 | int count = specpdl_ptr - specpdl; |
6850 | unsigned char *destination; | |
6851 | EMACS_INT dst_bytes; | |
6852 | EMACS_INT chars = to - from; | |
6853 | EMACS_INT bytes = to_byte - from_byte; | |
6854 | Lisp_Object attrs; | |
4776e638 | 6855 | int saved_pt = -1, saved_pt_byte; |
64cedb0c | 6856 | int need_marker_adjustment = 0; |
b3bfad50 | 6857 | Lisp_Object old_deactivate_mark; |
d46c5b12 | 6858 | |
b3bfad50 | 6859 | old_deactivate_mark = Vdeactivate_mark; |
93dec019 | 6860 | |
df7492f9 | 6861 | if (NILP (dst_object)) |
d46c5b12 | 6862 | { |
df7492f9 KH |
6863 | destination = coding->destination; |
6864 | dst_bytes = coding->dst_bytes; | |
d46c5b12 | 6865 | } |
93dec019 | 6866 | |
df7492f9 KH |
6867 | coding->src_object = src_object; |
6868 | coding->src_chars = chars; | |
6869 | coding->src_bytes = bytes; | |
6870 | coding->src_multibyte = chars < bytes; | |
70ad9fc4 | 6871 | |
df7492f9 | 6872 | if (STRINGP (src_object)) |
d46c5b12 | 6873 | { |
df7492f9 KH |
6874 | coding->src_pos = from; |
6875 | coding->src_pos_byte = from_byte; | |
d46c5b12 | 6876 | } |
df7492f9 | 6877 | else if (BUFFERP (src_object)) |
88993dfd | 6878 | { |
df7492f9 KH |
6879 | set_buffer_internal (XBUFFER (src_object)); |
6880 | if (from != GPT) | |
6881 | move_gap_both (from, from_byte); | |
6882 | if (EQ (src_object, dst_object)) | |
fb88bf2d | 6883 | { |
64cedb0c KH |
6884 | struct Lisp_Marker *tail; |
6885 | ||
6886 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) | |
6887 | { | |
6888 | tail->need_adjustment | |
6889 | = tail->charpos == (tail->insertion_type ? from : to); | |
6890 | need_marker_adjustment |= tail->need_adjustment; | |
6891 | } | |
4776e638 | 6892 | saved_pt = PT, saved_pt_byte = PT_BYTE; |
df7492f9 KH |
6893 | TEMP_SET_PT_BOTH (from, from_byte); |
6894 | del_range_both (from, from_byte, to, to_byte, 1); | |
6895 | coding->src_pos = -chars; | |
6896 | coding->src_pos_byte = -bytes; | |
fb88bf2d | 6897 | } |
df7492f9 | 6898 | else |
fb88bf2d | 6899 | { |
df7492f9 KH |
6900 | coding->src_pos = from; |
6901 | coding->src_pos_byte = from_byte; | |
fb88bf2d | 6902 | } |
88993dfd KH |
6903 | } |
6904 | ||
df7492f9 KH |
6905 | if (CODING_REQUIRE_DETECTION (coding)) |
6906 | detect_coding (coding); | |
6907 | attrs = CODING_ID_ATTRS (coding->id); | |
d46c5b12 | 6908 | |
2cb26057 KH |
6909 | if (EQ (dst_object, Qt) |
6910 | || (! NILP (CODING_ATTR_POST_READ (attrs)) | |
6911 | && NILP (dst_object))) | |
b73bfc1c | 6912 | { |
24a73b0a | 6913 | coding->dst_object = code_conversion_save (1, 1); |
df7492f9 KH |
6914 | coding->dst_pos = BEG; |
6915 | coding->dst_pos_byte = BEG_BYTE; | |
6916 | coding->dst_multibyte = 1; | |
b73bfc1c | 6917 | } |
df7492f9 | 6918 | else if (BUFFERP (dst_object)) |
d46c5b12 | 6919 | { |
24a73b0a | 6920 | code_conversion_save (0, 0); |
df7492f9 KH |
6921 | coding->dst_object = dst_object; |
6922 | coding->dst_pos = BUF_PT (XBUFFER (dst_object)); | |
6923 | coding->dst_pos_byte = BUF_PT_BYTE (XBUFFER (dst_object)); | |
6924 | coding->dst_multibyte | |
6925 | = ! NILP (XBUFFER (dst_object)->enable_multibyte_characters); | |
d46c5b12 KH |
6926 | } |
6927 | else | |
6928 | { | |
24a73b0a | 6929 | code_conversion_save (0, 0); |
df7492f9 KH |
6930 | coding->dst_object = Qnil; |
6931 | coding->dst_multibyte = 1; | |
d46c5b12 KH |
6932 | } |
6933 | ||
df7492f9 | 6934 | decode_coding (coding); |
fa46990e | 6935 | |
df7492f9 KH |
6936 | if (BUFFERP (coding->dst_object)) |
6937 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
d46c5b12 | 6938 | |
df7492f9 | 6939 | if (! NILP (CODING_ATTR_POST_READ (attrs))) |
d46c5b12 | 6940 | { |
b3bfad50 | 6941 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
df7492f9 | 6942 | EMACS_INT prev_Z = Z, prev_Z_BYTE = Z_BYTE; |
2b4f9037 | 6943 | Lisp_Object val; |
d46c5b12 | 6944 | |
c0cc7f7f | 6945 | TEMP_SET_PT_BOTH (coding->dst_pos, coding->dst_pos_byte); |
b3bfad50 KH |
6946 | GCPRO5 (coding->src_object, coding->dst_object, src_object, dst_object, |
6947 | old_deactivate_mark); | |
d4850d67 KH |
6948 | val = safe_call1 (CODING_ATTR_POST_READ (attrs), |
6949 | make_number (coding->produced_char)); | |
df7492f9 KH |
6950 | UNGCPRO; |
6951 | CHECK_NATNUM (val); | |
6952 | coding->produced_char += Z - prev_Z; | |
6953 | coding->produced += Z_BYTE - prev_Z_BYTE; | |
d46c5b12 | 6954 | } |
de79a6a5 | 6955 | |
df7492f9 | 6956 | if (EQ (dst_object, Qt)) |
ec6d2bb8 | 6957 | { |
df7492f9 KH |
6958 | coding->dst_object = Fbuffer_string (); |
6959 | } | |
6960 | else if (NILP (dst_object) && BUFFERP (coding->dst_object)) | |
6961 | { | |
6962 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
6963 | if (dst_bytes < coding->produced) | |
6964 | { | |
b3bfad50 | 6965 | destination = xrealloc (destination, coding->produced); |
df7492f9 KH |
6966 | if (! destination) |
6967 | { | |
065e3595 KH |
6968 | record_conversion_result (coding, |
6969 | CODING_RESULT_INSUFFICIENT_DST); | |
df7492f9 KH |
6970 | unbind_to (count, Qnil); |
6971 | return; | |
6972 | } | |
6973 | if (BEGV < GPT && GPT < BEGV + coding->produced_char) | |
6974 | move_gap_both (BEGV, BEGV_BYTE); | |
6975 | bcopy (BEGV_ADDR, destination, coding->produced); | |
6976 | coding->destination = destination; | |
d46c5b12 | 6977 | } |
ec6d2bb8 | 6978 | } |
b73bfc1c | 6979 | |
4776e638 KH |
6980 | if (saved_pt >= 0) |
6981 | { | |
6982 | /* This is the case of: | |
6983 | (BUFFERP (src_object) && EQ (src_object, dst_object)) | |
6984 | As we have moved PT while replacing the original buffer | |
6985 | contents, we must recover it now. */ | |
6986 | set_buffer_internal (XBUFFER (src_object)); | |
6987 | if (saved_pt < from) | |
6988 | TEMP_SET_PT_BOTH (saved_pt, saved_pt_byte); | |
6989 | else if (saved_pt < from + chars) | |
6990 | TEMP_SET_PT_BOTH (from, from_byte); | |
6991 | else if (! NILP (current_buffer->enable_multibyte_characters)) | |
6992 | TEMP_SET_PT_BOTH (saved_pt + (coding->produced_char - chars), | |
6993 | saved_pt_byte + (coding->produced - bytes)); | |
6994 | else | |
6995 | TEMP_SET_PT_BOTH (saved_pt + (coding->produced - bytes), | |
6996 | saved_pt_byte + (coding->produced - bytes)); | |
64cedb0c KH |
6997 | |
6998 | if (need_marker_adjustment) | |
6999 | { | |
7000 | struct Lisp_Marker *tail; | |
7001 | ||
7002 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) | |
7003 | if (tail->need_adjustment) | |
7004 | { | |
7005 | tail->need_adjustment = 0; | |
7006 | if (tail->insertion_type) | |
7007 | { | |
7008 | tail->bytepos = from_byte; | |
7009 | tail->charpos = from; | |
7010 | } | |
7011 | else | |
7012 | { | |
7013 | tail->bytepos = from_byte + coding->produced; | |
7014 | tail->charpos | |
7015 | = (NILP (current_buffer->enable_multibyte_characters) | |
7016 | ? tail->bytepos : from + coding->produced_char); | |
7017 | } | |
7018 | } | |
7019 | } | |
d46c5b12 | 7020 | } |
4776e638 | 7021 | |
b3bfad50 | 7022 | Vdeactivate_mark = old_deactivate_mark; |
065e3595 | 7023 | unbind_to (count, coding->dst_object); |
d46c5b12 KH |
7024 | } |
7025 | ||
d46c5b12 | 7026 | |
df7492f9 KH |
7027 | void |
7028 | encode_coding_object (coding, src_object, from, from_byte, to, to_byte, | |
7029 | dst_object) | |
d46c5b12 | 7030 | struct coding_system *coding; |
df7492f9 KH |
7031 | Lisp_Object src_object; |
7032 | EMACS_INT from, from_byte, to, to_byte; | |
7033 | Lisp_Object dst_object; | |
d46c5b12 | 7034 | { |
b73bfc1c | 7035 | int count = specpdl_ptr - specpdl; |
df7492f9 KH |
7036 | EMACS_INT chars = to - from; |
7037 | EMACS_INT bytes = to_byte - from_byte; | |
7038 | Lisp_Object attrs; | |
4776e638 | 7039 | int saved_pt = -1, saved_pt_byte; |
64cedb0c | 7040 | int need_marker_adjustment = 0; |
c02d943b | 7041 | int kill_src_buffer = 0; |
b3bfad50 | 7042 | Lisp_Object old_deactivate_mark; |
df7492f9 | 7043 | |
b3bfad50 | 7044 | old_deactivate_mark = Vdeactivate_mark; |
df7492f9 KH |
7045 | |
7046 | coding->src_object = src_object; | |
7047 | coding->src_chars = chars; | |
7048 | coding->src_bytes = bytes; | |
7049 | coding->src_multibyte = chars < bytes; | |
7050 | ||
7051 | attrs = CODING_ID_ATTRS (coding->id); | |
7052 | ||
64cedb0c KH |
7053 | if (EQ (src_object, dst_object)) |
7054 | { | |
7055 | struct Lisp_Marker *tail; | |
7056 | ||
7057 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) | |
7058 | { | |
7059 | tail->need_adjustment | |
7060 | = tail->charpos == (tail->insertion_type ? from : to); | |
7061 | need_marker_adjustment |= tail->need_adjustment; | |
7062 | } | |
7063 | } | |
7064 | ||
df7492f9 | 7065 | if (! NILP (CODING_ATTR_PRE_WRITE (attrs))) |
6bac5b12 | 7066 | { |
24a73b0a | 7067 | coding->src_object = code_conversion_save (1, coding->src_multibyte); |
df7492f9 KH |
7068 | set_buffer_internal (XBUFFER (coding->src_object)); |
7069 | if (STRINGP (src_object)) | |
7070 | insert_from_string (src_object, from, from_byte, chars, bytes, 0); | |
7071 | else if (BUFFERP (src_object)) | |
7072 | insert_from_buffer (XBUFFER (src_object), from, chars, 0); | |
7073 | else | |
7074 | insert_1_both (coding->source + from, chars, bytes, 0, 0, 0); | |
d46c5b12 | 7075 | |
df7492f9 KH |
7076 | if (EQ (src_object, dst_object)) |
7077 | { | |
7078 | set_buffer_internal (XBUFFER (src_object)); | |
4776e638 | 7079 | saved_pt = PT, saved_pt_byte = PT_BYTE; |
df7492f9 KH |
7080 | del_range_both (from, from_byte, to, to_byte, 1); |
7081 | set_buffer_internal (XBUFFER (coding->src_object)); | |
7082 | } | |
7083 | ||
d4850d67 KH |
7084 | { |
7085 | Lisp_Object args[3]; | |
b3bfad50 | 7086 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
d4850d67 | 7087 | |
b3bfad50 KH |
7088 | GCPRO5 (coding->src_object, coding->dst_object, src_object, dst_object, |
7089 | old_deactivate_mark); | |
d4850d67 KH |
7090 | args[0] = CODING_ATTR_PRE_WRITE (attrs); |
7091 | args[1] = make_number (BEG); | |
7092 | args[2] = make_number (Z); | |
7093 | safe_call (3, args); | |
b3bfad50 | 7094 | UNGCPRO; |
d4850d67 | 7095 | } |
c02d943b KH |
7096 | if (XBUFFER (coding->src_object) != current_buffer) |
7097 | kill_src_buffer = 1; | |
ac87bbef | 7098 | coding->src_object = Fcurrent_buffer (); |
df7492f9 KH |
7099 | if (BEG != GPT) |
7100 | move_gap_both (BEG, BEG_BYTE); | |
7101 | coding->src_chars = Z - BEG; | |
7102 | coding->src_bytes = Z_BYTE - BEG_BYTE; | |
7103 | coding->src_pos = BEG; | |
7104 | coding->src_pos_byte = BEG_BYTE; | |
7105 | coding->src_multibyte = Z < Z_BYTE; | |
7106 | } | |
7107 | else if (STRINGP (src_object)) | |
d46c5b12 | 7108 | { |
24a73b0a | 7109 | code_conversion_save (0, 0); |
df7492f9 KH |
7110 | coding->src_pos = from; |
7111 | coding->src_pos_byte = from_byte; | |
b73bfc1c | 7112 | } |
df7492f9 | 7113 | else if (BUFFERP (src_object)) |
b73bfc1c | 7114 | { |
24a73b0a | 7115 | code_conversion_save (0, 0); |
df7492f9 | 7116 | set_buffer_internal (XBUFFER (src_object)); |
df7492f9 | 7117 | if (EQ (src_object, dst_object)) |
d46c5b12 | 7118 | { |
4776e638 | 7119 | saved_pt = PT, saved_pt_byte = PT_BYTE; |
ff0dacd7 KH |
7120 | coding->src_object = del_range_1 (from, to, 1, 1); |
7121 | coding->src_pos = 0; | |
7122 | coding->src_pos_byte = 0; | |
d46c5b12 | 7123 | } |
df7492f9 | 7124 | else |
d46c5b12 | 7125 | { |
ff0dacd7 KH |
7126 | if (from < GPT && to >= GPT) |
7127 | move_gap_both (from, from_byte); | |
df7492f9 KH |
7128 | coding->src_pos = from; |
7129 | coding->src_pos_byte = from_byte; | |
d46c5b12 | 7130 | } |
d46c5b12 | 7131 | } |
4776e638 | 7132 | else |
24a73b0a | 7133 | code_conversion_save (0, 0); |
d46c5b12 | 7134 | |
df7492f9 | 7135 | if (BUFFERP (dst_object)) |
88993dfd | 7136 | { |
df7492f9 | 7137 | coding->dst_object = dst_object; |
28f67a95 KH |
7138 | if (EQ (src_object, dst_object)) |
7139 | { | |
7140 | coding->dst_pos = from; | |
7141 | coding->dst_pos_byte = from_byte; | |
7142 | } | |
7143 | else | |
7144 | { | |
7145 | coding->dst_pos = BUF_PT (XBUFFER (dst_object)); | |
7146 | coding->dst_pos_byte = BUF_PT_BYTE (XBUFFER (dst_object)); | |
7147 | } | |
df7492f9 KH |
7148 | coding->dst_multibyte |
7149 | = ! NILP (XBUFFER (dst_object)->enable_multibyte_characters); | |
88993dfd | 7150 | } |
df7492f9 | 7151 | else if (EQ (dst_object, Qt)) |
d46c5b12 | 7152 | { |
df7492f9 | 7153 | coding->dst_object = Qnil; |
df7492f9 | 7154 | coding->dst_bytes = coding->src_chars; |
ac87bbef KH |
7155 | if (coding->dst_bytes == 0) |
7156 | coding->dst_bytes = 1; | |
7157 | coding->destination = (unsigned char *) xmalloc (coding->dst_bytes); | |
df7492f9 | 7158 | coding->dst_multibyte = 0; |
d46c5b12 KH |
7159 | } |
7160 | else | |
7161 | { | |
df7492f9 KH |
7162 | coding->dst_object = Qnil; |
7163 | coding->dst_multibyte = 0; | |
d46c5b12 KH |
7164 | } |
7165 | ||
df7492f9 | 7166 | encode_coding (coding); |
d46c5b12 | 7167 | |
df7492f9 | 7168 | if (EQ (dst_object, Qt)) |
d46c5b12 | 7169 | { |
df7492f9 KH |
7170 | if (BUFFERP (coding->dst_object)) |
7171 | coding->dst_object = Fbuffer_string (); | |
7172 | else | |
d46c5b12 | 7173 | { |
df7492f9 KH |
7174 | coding->dst_object |
7175 | = make_unibyte_string ((char *) coding->destination, | |
7176 | coding->produced); | |
7177 | xfree (coding->destination); | |
d46c5b12 | 7178 | } |
4ed46869 | 7179 | } |
d46c5b12 | 7180 | |
4776e638 KH |
7181 | if (saved_pt >= 0) |
7182 | { | |
7183 | /* This is the case of: | |
7184 | (BUFFERP (src_object) && EQ (src_object, dst_object)) | |
7185 | As we have moved PT while replacing the original buffer | |
7186 | contents, we must recover it now. */ | |
7187 | set_buffer_internal (XBUFFER (src_object)); | |
7188 | if (saved_pt < from) | |
7189 | TEMP_SET_PT_BOTH (saved_pt, saved_pt_byte); | |
7190 | else if (saved_pt < from + chars) | |
7191 | TEMP_SET_PT_BOTH (from, from_byte); | |
7192 | else if (! NILP (current_buffer->enable_multibyte_characters)) | |
7193 | TEMP_SET_PT_BOTH (saved_pt + (coding->produced_char - chars), | |
7194 | saved_pt_byte + (coding->produced - bytes)); | |
d46c5b12 | 7195 | else |
4776e638 KH |
7196 | TEMP_SET_PT_BOTH (saved_pt + (coding->produced - bytes), |
7197 | saved_pt_byte + (coding->produced - bytes)); | |
64cedb0c KH |
7198 | |
7199 | if (need_marker_adjustment) | |
7200 | { | |
7201 | struct Lisp_Marker *tail; | |
7202 | ||
7203 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) | |
7204 | if (tail->need_adjustment) | |
7205 | { | |
7206 | tail->need_adjustment = 0; | |
7207 | if (tail->insertion_type) | |
7208 | { | |
7209 | tail->bytepos = from_byte; | |
7210 | tail->charpos = from; | |
7211 | } | |
7212 | else | |
7213 | { | |
7214 | tail->bytepos = from_byte + coding->produced; | |
7215 | tail->charpos | |
7216 | = (NILP (current_buffer->enable_multibyte_characters) | |
7217 | ? tail->bytepos : from + coding->produced_char); | |
7218 | } | |
7219 | } | |
7220 | } | |
4776e638 KH |
7221 | } |
7222 | ||
c02d943b KH |
7223 | if (kill_src_buffer) |
7224 | Fkill_buffer (coding->src_object); | |
b3bfad50 KH |
7225 | |
7226 | Vdeactivate_mark = old_deactivate_mark; | |
df7492f9 | 7227 | unbind_to (count, Qnil); |
b73bfc1c KH |
7228 | } |
7229 | ||
df7492f9 | 7230 | |
b73bfc1c | 7231 | Lisp_Object |
df7492f9 | 7232 | preferred_coding_system () |
b73bfc1c | 7233 | { |
df7492f9 | 7234 | int id = coding_categories[coding_priorities[0]].id; |
2391eaa4 | 7235 | |
df7492f9 | 7236 | return CODING_ID_NAME (id); |
4ed46869 KH |
7237 | } |
7238 | ||
7239 | \f | |
7240 | #ifdef emacs | |
1397dc18 | 7241 | /*** 8. Emacs Lisp library functions ***/ |
4ed46869 | 7242 | |
4ed46869 | 7243 | DEFUN ("coding-system-p", Fcoding_system_p, Scoding_system_p, 1, 1, 0, |
48b0f3ae | 7244 | doc: /* Return t if OBJECT is nil or a coding-system. |
df7492f9 | 7245 | See the documentation of `define-coding-system' for information |
48b0f3ae PJ |
7246 | about coding-system objects. */) |
7247 | (obj) | |
4ed46869 KH |
7248 | Lisp_Object obj; |
7249 | { | |
44e8490d KH |
7250 | if (NILP (obj) |
7251 | || CODING_SYSTEM_ID (obj) >= 0) | |
7252 | return Qt; | |
7253 | if (! SYMBOLP (obj) | |
7254 | || NILP (Fget (obj, Qcoding_system_define_form))) | |
7255 | return Qnil; | |
7256 | return Qt; | |
4ed46869 KH |
7257 | } |
7258 | ||
9d991de8 RS |
7259 | DEFUN ("read-non-nil-coding-system", Fread_non_nil_coding_system, |
7260 | Sread_non_nil_coding_system, 1, 1, 0, | |
48b0f3ae PJ |
7261 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. */) |
7262 | (prompt) | |
4ed46869 KH |
7263 | Lisp_Object prompt; |
7264 | { | |
e0e989f6 | 7265 | Lisp_Object val; |
9d991de8 RS |
7266 | do |
7267 | { | |
4608c386 KH |
7268 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
7269 | Qt, Qnil, Qcoding_system_history, Qnil, Qnil); | |
9d991de8 | 7270 | } |
8f924df7 | 7271 | while (SCHARS (val) == 0); |
e0e989f6 | 7272 | return (Fintern (val, Qnil)); |
4ed46869 KH |
7273 | } |
7274 | ||
9b787f3e | 7275 | DEFUN ("read-coding-system", Fread_coding_system, Sread_coding_system, 1, 2, 0, |
48b0f3ae | 7276 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. |
c7183fb8 GM |
7277 | If the user enters null input, return second argument DEFAULT-CODING-SYSTEM. |
7278 | Ignores case when completing coding systems (all Emacs coding systems | |
7279 | are lower-case). */) | |
48b0f3ae | 7280 | (prompt, default_coding_system) |
9b787f3e | 7281 | Lisp_Object prompt, default_coding_system; |
4ed46869 | 7282 | { |
f44d27ce | 7283 | Lisp_Object val; |
c7183fb8 GM |
7284 | int count = SPECPDL_INDEX (); |
7285 | ||
9b787f3e | 7286 | if (SYMBOLP (default_coding_system)) |
57d25e6f | 7287 | default_coding_system = SYMBOL_NAME (default_coding_system); |
c7183fb8 | 7288 | specbind (Qcompletion_ignore_case, Qt); |
4608c386 | 7289 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
9b787f3e RS |
7290 | Qt, Qnil, Qcoding_system_history, |
7291 | default_coding_system, Qnil); | |
c7183fb8 | 7292 | unbind_to (count, Qnil); |
8f924df7 | 7293 | return (SCHARS (val) == 0 ? Qnil : Fintern (val, Qnil)); |
4ed46869 KH |
7294 | } |
7295 | ||
7296 | DEFUN ("check-coding-system", Fcheck_coding_system, Scheck_coding_system, | |
7297 | 1, 1, 0, | |
48b0f3ae | 7298 | doc: /* Check validity of CODING-SYSTEM. |
9ffd559c KH |
7299 | If valid, return CODING-SYSTEM, else signal a `coding-system-error' error. |
7300 | It is valid if it is nil or a symbol defined as a coding system by the | |
7301 | function `define-coding-system'. */) | |
df7492f9 | 7302 | (coding_system) |
4ed46869 KH |
7303 | Lisp_Object coding_system; |
7304 | { | |
44e8490d KH |
7305 | Lisp_Object define_form; |
7306 | ||
7307 | define_form = Fget (coding_system, Qcoding_system_define_form); | |
7308 | if (! NILP (define_form)) | |
7309 | { | |
7310 | Fput (coding_system, Qcoding_system_define_form, Qnil); | |
7311 | safe_eval (define_form); | |
7312 | } | |
4ed46869 KH |
7313 | if (!NILP (Fcoding_system_p (coding_system))) |
7314 | return coding_system; | |
fcad4ec4 | 7315 | xsignal1 (Qcoding_system_error, coding_system); |
4ed46869 | 7316 | } |
df7492f9 | 7317 | |
3a73fa5d | 7318 | \f |
89528eb3 KH |
7319 | /* Detect how the bytes at SRC of length SRC_BYTES are encoded. If |
7320 | HIGHEST is nonzero, return the coding system of the highest | |
7321 | priority among the detected coding systems. Otherwize return a | |
7322 | list of detected coding systems sorted by their priorities. If | |
7323 | MULTIBYTEP is nonzero, it is assumed that the bytes are in correct | |
7324 | multibyte form but contains only ASCII and eight-bit chars. | |
7325 | Otherwise, the bytes are raw bytes. | |
7326 | ||
7327 | CODING-SYSTEM controls the detection as below: | |
7328 | ||
7329 | If it is nil, detect both text-format and eol-format. If the | |
7330 | text-format part of CODING-SYSTEM is already specified | |
7331 | (e.g. `iso-latin-1'), detect only eol-format. If the eol-format | |
7332 | part of CODING-SYSTEM is already specified (e.g. `undecided-unix'), | |
7333 | detect only text-format. */ | |
7334 | ||
d46c5b12 | 7335 | Lisp_Object |
24a73b0a KH |
7336 | detect_coding_system (src, src_chars, src_bytes, highest, multibytep, |
7337 | coding_system) | |
8f924df7 | 7338 | const unsigned char *src; |
13818c30 SM |
7339 | EMACS_INT src_chars, src_bytes; |
7340 | int highest; | |
0a28aafb | 7341 | int multibytep; |
df7492f9 | 7342 | Lisp_Object coding_system; |
4ed46869 | 7343 | { |
8f924df7 | 7344 | const unsigned char *src_end = src + src_bytes; |
df7492f9 KH |
7345 | Lisp_Object attrs, eol_type; |
7346 | Lisp_Object val; | |
7347 | struct coding_system coding; | |
89528eb3 | 7348 | int id; |
ff0dacd7 | 7349 | struct coding_detection_info detect_info; |
24a73b0a | 7350 | enum coding_category base_category; |
b73bfc1c | 7351 | |
df7492f9 KH |
7352 | if (NILP (coding_system)) |
7353 | coding_system = Qundecided; | |
7354 | setup_coding_system (coding_system, &coding); | |
7355 | attrs = CODING_ID_ATTRS (coding.id); | |
7356 | eol_type = CODING_ID_EOL_TYPE (coding.id); | |
89528eb3 | 7357 | coding_system = CODING_ATTR_BASE_NAME (attrs); |
4ed46869 | 7358 | |
df7492f9 | 7359 | coding.source = src; |
24a73b0a | 7360 | coding.src_chars = src_chars; |
df7492f9 KH |
7361 | coding.src_bytes = src_bytes; |
7362 | coding.src_multibyte = multibytep; | |
7363 | coding.consumed = 0; | |
89528eb3 | 7364 | coding.mode |= CODING_MODE_LAST_BLOCK; |
d46c5b12 | 7365 | |
ff0dacd7 | 7366 | detect_info.checked = detect_info.found = detect_info.rejected = 0; |
d46c5b12 | 7367 | |
89528eb3 | 7368 | /* At first, detect text-format if necessary. */ |
24a73b0a KH |
7369 | base_category = XINT (CODING_ATTR_CATEGORY (attrs)); |
7370 | if (base_category == coding_category_undecided) | |
4ed46869 | 7371 | { |
ff0dacd7 KH |
7372 | enum coding_category category; |
7373 | struct coding_system *this; | |
7374 | int c, i; | |
88993dfd | 7375 | |
24a73b0a KH |
7376 | /* Skip all ASCII bytes except for a few ISO2022 controls. */ |
7377 | for (i = 0; src < src_end; i++, src++) | |
4ed46869 | 7378 | { |
df7492f9 | 7379 | c = *src; |
6cb21a4f | 7380 | if (c & 0x80) |
d46c5b12 | 7381 | break; |
6cb21a4f KH |
7382 | if (c < 0x20 |
7383 | && (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) | |
c7266f4a | 7384 | && ! inhibit_iso_escape_detection) |
6cb21a4f KH |
7385 | { |
7386 | coding.head_ascii = src - coding.source; | |
7387 | if (detect_coding_iso_2022 (&coding, &detect_info)) | |
7388 | { | |
7389 | /* We have scanned the whole data. */ | |
7390 | if (! (detect_info.rejected & CATEGORY_MASK_ISO_7_ELSE)) | |
7391 | /* We didn't find an 8-bit code. */ | |
7392 | src = src_end; | |
7393 | break; | |
7394 | } | |
7395 | } | |
4ed46869 | 7396 | } |
df7492f9 | 7397 | coding.head_ascii = src - coding.source; |
88993dfd | 7398 | |
6cb21a4f KH |
7399 | if (src < src_end |
7400 | || detect_info.found) | |
7401 | { | |
7402 | if (src == src_end) | |
7403 | /* As all bytes are 7-bit, we can ignore non-ISO-2022 codings. */ | |
7404 | for (i = 0; i < coding_category_raw_text; i++) | |
ff0dacd7 | 7405 | { |
6cb21a4f | 7406 | category = coding_priorities[i]; |
c7266f4a | 7407 | this = coding_categories + category; |
6cb21a4f | 7408 | if (detect_info.found & (1 << category)) |
ff0dacd7 KH |
7409 | break; |
7410 | } | |
6cb21a4f KH |
7411 | else |
7412 | for (i = 0; i < coding_category_raw_text; i++) | |
df7492f9 | 7413 | { |
6cb21a4f KH |
7414 | category = coding_priorities[i]; |
7415 | this = coding_categories + category; | |
7416 | ||
7417 | if (this->id < 0) | |
24a73b0a | 7418 | { |
6cb21a4f KH |
7419 | /* No coding system of this category is defined. */ |
7420 | detect_info.rejected |= (1 << category); | |
7421 | } | |
7422 | else if (category >= coding_category_raw_text) | |
7423 | continue; | |
7424 | else if (detect_info.checked & (1 << category)) | |
7425 | { | |
7426 | if (highest | |
7427 | && (detect_info.found & (1 << category))) | |
7428 | break; | |
7429 | } | |
7430 | else | |
7431 | { | |
7432 | if ((*(this->detector)) (&coding, &detect_info) | |
7433 | && highest | |
7434 | && (detect_info.found & (1 << category))) | |
24a73b0a | 7435 | { |
6cb21a4f KH |
7436 | if (category == coding_category_utf_16_auto) |
7437 | { | |
7438 | if (detect_info.found & CATEGORY_MASK_UTF_16_LE) | |
7439 | category = coding_category_utf_16_le; | |
7440 | else | |
7441 | category = coding_category_utf_16_be; | |
7442 | } | |
7443 | break; | |
24a73b0a | 7444 | } |
24a73b0a | 7445 | } |
df7492f9 | 7446 | } |
6cb21a4f | 7447 | } |
ec6d2bb8 | 7448 | |
ff0dacd7 | 7449 | if (detect_info.rejected == CATEGORY_MASK_ANY) |
ec6d2bb8 | 7450 | { |
ff0dacd7 | 7451 | detect_info.found = CATEGORY_MASK_RAW_TEXT; |
89528eb3 KH |
7452 | id = coding_categories[coding_category_raw_text].id; |
7453 | val = Fcons (make_number (id), Qnil); | |
7454 | } | |
ff0dacd7 | 7455 | else if (! detect_info.rejected && ! detect_info.found) |
89528eb3 | 7456 | { |
ff0dacd7 | 7457 | detect_info.found = CATEGORY_MASK_ANY; |
89528eb3 KH |
7458 | id = coding_categories[coding_category_undecided].id; |
7459 | val = Fcons (make_number (id), Qnil); | |
7460 | } | |
7461 | else if (highest) | |
7462 | { | |
ff0dacd7 | 7463 | if (detect_info.found) |
ec6d2bb8 | 7464 | { |
ff0dacd7 KH |
7465 | detect_info.found = 1 << category; |
7466 | val = Fcons (make_number (this->id), Qnil); | |
7467 | } | |
7468 | else | |
7469 | for (i = 0; i < coding_category_raw_text; i++) | |
7470 | if (! (detect_info.rejected & (1 << coding_priorities[i]))) | |
7471 | { | |
7472 | detect_info.found = 1 << coding_priorities[i]; | |
7473 | id = coding_categories[coding_priorities[i]].id; | |
7474 | val = Fcons (make_number (id), Qnil); | |
7475 | break; | |
7476 | } | |
7477 | } | |
89528eb3 KH |
7478 | else |
7479 | { | |
ff0dacd7 KH |
7480 | int mask = detect_info.rejected | detect_info.found; |
7481 | int found = 0; | |
89528eb3 | 7482 | val = Qnil; |
ec6d2bb8 | 7483 | |
89528eb3 | 7484 | for (i = coding_category_raw_text - 1; i >= 0; i--) |
ff0dacd7 KH |
7485 | { |
7486 | category = coding_priorities[i]; | |
7487 | if (! (mask & (1 << category))) | |
ec6d2bb8 | 7488 | { |
ff0dacd7 KH |
7489 | found |= 1 << category; |
7490 | id = coding_categories[category].id; | |
c7266f4a KH |
7491 | if (id >= 0) |
7492 | val = Fcons (make_number (id), val); | |
ff0dacd7 KH |
7493 | } |
7494 | } | |
7495 | for (i = coding_category_raw_text - 1; i >= 0; i--) | |
7496 | { | |
7497 | category = coding_priorities[i]; | |
7498 | if (detect_info.found & (1 << category)) | |
7499 | { | |
7500 | id = coding_categories[category].id; | |
7501 | val = Fcons (make_number (id), val); | |
ec6d2bb8 | 7502 | } |
ec6d2bb8 | 7503 | } |
ff0dacd7 | 7504 | detect_info.found |= found; |
ec6d2bb8 | 7505 | } |
ec6d2bb8 | 7506 | } |
24a73b0a KH |
7507 | else if (base_category == coding_category_utf_16_auto) |
7508 | { | |
7509 | if (detect_coding_utf_16 (&coding, &detect_info)) | |
7510 | { | |
24a73b0a KH |
7511 | struct coding_system *this; |
7512 | ||
7513 | if (detect_info.found & CATEGORY_MASK_UTF_16_LE) | |
7514 | this = coding_categories + coding_category_utf_16_le; | |
7515 | else if (detect_info.found & CATEGORY_MASK_UTF_16_BE) | |
7516 | this = coding_categories + coding_category_utf_16_be; | |
7517 | else if (detect_info.rejected & CATEGORY_MASK_UTF_16_LE_NOSIG) | |
7518 | this = coding_categories + coding_category_utf_16_be_nosig; | |
7519 | else | |
7520 | this = coding_categories + coding_category_utf_16_le_nosig; | |
7521 | val = Fcons (make_number (this->id), Qnil); | |
7522 | } | |
7523 | } | |
df7492f9 KH |
7524 | else |
7525 | { | |
ff0dacd7 | 7526 | detect_info.found = 1 << XINT (CODING_ATTR_CATEGORY (attrs)); |
89528eb3 | 7527 | val = Fcons (make_number (coding.id), Qnil); |
4ed46869 | 7528 | } |
df7492f9 | 7529 | |
89528eb3 | 7530 | /* Then, detect eol-format if necessary. */ |
df7492f9 | 7531 | { |
89528eb3 | 7532 | int normal_eol = -1, utf_16_be_eol = -1, utf_16_le_eol; |
df7492f9 KH |
7533 | Lisp_Object tail; |
7534 | ||
89528eb3 KH |
7535 | if (VECTORP (eol_type)) |
7536 | { | |
ff0dacd7 | 7537 | if (detect_info.found & ~CATEGORY_MASK_UTF_16) |
89528eb3 KH |
7538 | normal_eol = detect_eol (coding.source, src_bytes, |
7539 | coding_category_raw_text); | |
ff0dacd7 KH |
7540 | if (detect_info.found & (CATEGORY_MASK_UTF_16_BE |
7541 | | CATEGORY_MASK_UTF_16_BE_NOSIG)) | |
89528eb3 KH |
7542 | utf_16_be_eol = detect_eol (coding.source, src_bytes, |
7543 | coding_category_utf_16_be); | |
ff0dacd7 KH |
7544 | if (detect_info.found & (CATEGORY_MASK_UTF_16_LE |
7545 | | CATEGORY_MASK_UTF_16_LE_NOSIG)) | |
89528eb3 KH |
7546 | utf_16_le_eol = detect_eol (coding.source, src_bytes, |
7547 | coding_category_utf_16_le); | |
7548 | } | |
7549 | else | |
7550 | { | |
7551 | if (EQ (eol_type, Qunix)) | |
7552 | normal_eol = utf_16_be_eol = utf_16_le_eol = EOL_SEEN_LF; | |
7553 | else if (EQ (eol_type, Qdos)) | |
7554 | normal_eol = utf_16_be_eol = utf_16_le_eol = EOL_SEEN_CRLF; | |
7555 | else | |
7556 | normal_eol = utf_16_be_eol = utf_16_le_eol = EOL_SEEN_CR; | |
7557 | } | |
7558 | ||
df7492f9 KH |
7559 | for (tail = val; CONSP (tail); tail = XCDR (tail)) |
7560 | { | |
89528eb3 | 7561 | enum coding_category category; |
df7492f9 | 7562 | int this_eol; |
89528eb3 KH |
7563 | |
7564 | id = XINT (XCAR (tail)); | |
7565 | attrs = CODING_ID_ATTRS (id); | |
7566 | category = XINT (CODING_ATTR_CATEGORY (attrs)); | |
7567 | eol_type = CODING_ID_EOL_TYPE (id); | |
df7492f9 KH |
7568 | if (VECTORP (eol_type)) |
7569 | { | |
89528eb3 KH |
7570 | if (category == coding_category_utf_16_be |
7571 | || category == coding_category_utf_16_be_nosig) | |
7572 | this_eol = utf_16_be_eol; | |
7573 | else if (category == coding_category_utf_16_le | |
7574 | || category == coding_category_utf_16_le_nosig) | |
7575 | this_eol = utf_16_le_eol; | |
df7492f9 | 7576 | else |
89528eb3 KH |
7577 | this_eol = normal_eol; |
7578 | ||
df7492f9 KH |
7579 | if (this_eol == EOL_SEEN_LF) |
7580 | XSETCAR (tail, AREF (eol_type, 0)); | |
7581 | else if (this_eol == EOL_SEEN_CRLF) | |
7582 | XSETCAR (tail, AREF (eol_type, 1)); | |
7583 | else if (this_eol == EOL_SEEN_CR) | |
7584 | XSETCAR (tail, AREF (eol_type, 2)); | |
89528eb3 KH |
7585 | else |
7586 | XSETCAR (tail, CODING_ID_NAME (id)); | |
df7492f9 | 7587 | } |
89528eb3 KH |
7588 | else |
7589 | XSETCAR (tail, CODING_ID_NAME (id)); | |
df7492f9 KH |
7590 | } |
7591 | } | |
ec6d2bb8 | 7592 | |
03699b14 | 7593 | return (highest ? XCAR (val) : val); |
ec6d2bb8 KH |
7594 | } |
7595 | ||
ec6d2bb8 | 7596 | |
d46c5b12 KH |
7597 | DEFUN ("detect-coding-region", Fdetect_coding_region, Sdetect_coding_region, |
7598 | 2, 3, 0, | |
48b0f3ae PJ |
7599 | doc: /* Detect coding system of the text in the region between START and END. |
7600 | Return a list of possible coding systems ordered by priority. | |
ec6d2bb8 | 7601 | |
12e0131a KH |
7602 | If only ASCII characters are found (except for such ISO-2022 control |
7603 | characters ISO-2022 as ESC), it returns a list of single element | |
48b0f3ae PJ |
7604 | `undecided' or its subsidiary coding system according to a detected |
7605 | end-of-line format. | |
ec6d2bb8 | 7606 | |
48b0f3ae PJ |
7607 | If optional argument HIGHEST is non-nil, return the coding system of |
7608 | highest priority. */) | |
7609 | (start, end, highest) | |
d46c5b12 KH |
7610 | Lisp_Object start, end, highest; |
7611 | { | |
7612 | int from, to; | |
7613 | int from_byte, to_byte; | |
ec6d2bb8 | 7614 | |
b7826503 PJ |
7615 | CHECK_NUMBER_COERCE_MARKER (start); |
7616 | CHECK_NUMBER_COERCE_MARKER (end); | |
ec6d2bb8 | 7617 | |
d46c5b12 KH |
7618 | validate_region (&start, &end); |
7619 | from = XINT (start), to = XINT (end); | |
7620 | from_byte = CHAR_TO_BYTE (from); | |
7621 | to_byte = CHAR_TO_BYTE (to); | |
ec6d2bb8 | 7622 | |
d46c5b12 KH |
7623 | if (from < GPT && to >= GPT) |
7624 | move_gap_both (to, to_byte); | |
c210f766 | 7625 | |
d46c5b12 | 7626 | return detect_coding_system (BYTE_POS_ADDR (from_byte), |
24a73b0a | 7627 | to - from, to_byte - from_byte, |
0a28aafb KH |
7628 | !NILP (highest), |
7629 | !NILP (current_buffer | |
df7492f9 KH |
7630 | ->enable_multibyte_characters), |
7631 | Qnil); | |
ec6d2bb8 KH |
7632 | } |
7633 | ||
d46c5b12 KH |
7634 | DEFUN ("detect-coding-string", Fdetect_coding_string, Sdetect_coding_string, |
7635 | 1, 2, 0, | |
48b0f3ae PJ |
7636 | doc: /* Detect coding system of the text in STRING. |
7637 | Return a list of possible coding systems ordered by priority. | |
fb88bf2d | 7638 | |
12e0131a KH |
7639 | If only ASCII characters are found (except for such ISO-2022 control |
7640 | characters ISO-2022 as ESC), it returns a list of single element | |
48b0f3ae PJ |
7641 | `undecided' or its subsidiary coding system according to a detected |
7642 | end-of-line format. | |
d46c5b12 | 7643 | |
48b0f3ae PJ |
7644 | If optional argument HIGHEST is non-nil, return the coding system of |
7645 | highest priority. */) | |
7646 | (string, highest) | |
d46c5b12 KH |
7647 | Lisp_Object string, highest; |
7648 | { | |
b7826503 | 7649 | CHECK_STRING (string); |
b73bfc1c | 7650 | |
24a73b0a KH |
7651 | return detect_coding_system (SDATA (string), |
7652 | SCHARS (string), SBYTES (string), | |
8f924df7 | 7653 | !NILP (highest), STRING_MULTIBYTE (string), |
df7492f9 | 7654 | Qnil); |
4ed46869 | 7655 | } |
4ed46869 | 7656 | |
b73bfc1c | 7657 | |
df7492f9 KH |
7658 | static INLINE int |
7659 | char_encodable_p (c, attrs) | |
7660 | int c; | |
7661 | Lisp_Object attrs; | |
05e6f5dc | 7662 | { |
df7492f9 | 7663 | Lisp_Object tail; |
df7492f9 | 7664 | struct charset *charset; |
7d64c6ad | 7665 | Lisp_Object translation_table; |
d46c5b12 | 7666 | |
7d64c6ad | 7667 | translation_table = CODING_ATTR_TRANS_TBL (attrs); |
a6f87d34 | 7668 | if (! NILP (translation_table)) |
7d64c6ad | 7669 | c = translate_char (translation_table, c); |
df7492f9 KH |
7670 | for (tail = CODING_ATTR_CHARSET_LIST (attrs); |
7671 | CONSP (tail); tail = XCDR (tail)) | |
e133c8fa | 7672 | { |
df7492f9 KH |
7673 | charset = CHARSET_FROM_ID (XINT (XCAR (tail))); |
7674 | if (CHAR_CHARSET_P (c, charset)) | |
7675 | break; | |
e133c8fa | 7676 | } |
df7492f9 | 7677 | return (! NILP (tail)); |
05e6f5dc | 7678 | } |
83fa074f | 7679 | |
fb88bf2d | 7680 | |
df7492f9 KH |
7681 | /* Return a list of coding systems that safely encode the text between |
7682 | START and END. If EXCLUDE is non-nil, it is a list of coding | |
7683 | systems not to check. The returned list doesn't contain any such | |
48468dac | 7684 | coding systems. In any case, if the text contains only ASCII or is |
df7492f9 | 7685 | unibyte, return t. */ |
e077cc80 | 7686 | |
df7492f9 KH |
7687 | DEFUN ("find-coding-systems-region-internal", |
7688 | Ffind_coding_systems_region_internal, | |
7689 | Sfind_coding_systems_region_internal, 2, 3, 0, | |
7690 | doc: /* Internal use only. */) | |
7691 | (start, end, exclude) | |
7692 | Lisp_Object start, end, exclude; | |
7693 | { | |
7694 | Lisp_Object coding_attrs_list, safe_codings; | |
7695 | EMACS_INT start_byte, end_byte; | |
7c78e542 | 7696 | const unsigned char *p, *pbeg, *pend; |
df7492f9 KH |
7697 | int c; |
7698 | Lisp_Object tail, elt; | |
d46c5b12 | 7699 | |
df7492f9 KH |
7700 | if (STRINGP (start)) |
7701 | { | |
7702 | if (!STRING_MULTIBYTE (start) | |
8f924df7 | 7703 | || SCHARS (start) == SBYTES (start)) |
df7492f9 KH |
7704 | return Qt; |
7705 | start_byte = 0; | |
8f924df7 | 7706 | end_byte = SBYTES (start); |
df7492f9 KH |
7707 | } |
7708 | else | |
d46c5b12 | 7709 | { |
df7492f9 KH |
7710 | CHECK_NUMBER_COERCE_MARKER (start); |
7711 | CHECK_NUMBER_COERCE_MARKER (end); | |
7712 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) | |
7713 | args_out_of_range (start, end); | |
7714 | if (NILP (current_buffer->enable_multibyte_characters)) | |
7715 | return Qt; | |
7716 | start_byte = CHAR_TO_BYTE (XINT (start)); | |
7717 | end_byte = CHAR_TO_BYTE (XINT (end)); | |
7718 | if (XINT (end) - XINT (start) == end_byte - start_byte) | |
7719 | return Qt; | |
d46c5b12 | 7720 | |
e1c23804 | 7721 | if (XINT (start) < GPT && XINT (end) > GPT) |
d46c5b12 | 7722 | { |
e1c23804 DL |
7723 | if ((GPT - XINT (start)) < (XINT (end) - GPT)) |
7724 | move_gap_both (XINT (start), start_byte); | |
df7492f9 | 7725 | else |
e1c23804 | 7726 | move_gap_both (XINT (end), end_byte); |
d46c5b12 KH |
7727 | } |
7728 | } | |
7729 | ||
df7492f9 KH |
7730 | coding_attrs_list = Qnil; |
7731 | for (tail = Vcoding_system_list; CONSP (tail); tail = XCDR (tail)) | |
7732 | if (NILP (exclude) | |
7733 | || NILP (Fmemq (XCAR (tail), exclude))) | |
7734 | { | |
7735 | Lisp_Object attrs; | |
d46c5b12 | 7736 | |
df7492f9 KH |
7737 | attrs = AREF (CODING_SYSTEM_SPEC (XCAR (tail)), 0); |
7738 | if (EQ (XCAR (tail), CODING_ATTR_BASE_NAME (attrs)) | |
7739 | && ! EQ (CODING_ATTR_TYPE (attrs), Qundecided)) | |
7d64c6ad KH |
7740 | { |
7741 | ASET (attrs, coding_attr_trans_tbl, | |
2170c8f0 | 7742 | get_translation_table (attrs, 1, NULL)); |
7d64c6ad KH |
7743 | coding_attrs_list = Fcons (attrs, coding_attrs_list); |
7744 | } | |
df7492f9 | 7745 | } |
d46c5b12 | 7746 | |
df7492f9 | 7747 | if (STRINGP (start)) |
8f924df7 | 7748 | p = pbeg = SDATA (start); |
df7492f9 KH |
7749 | else |
7750 | p = pbeg = BYTE_POS_ADDR (start_byte); | |
7751 | pend = p + (end_byte - start_byte); | |
b843d1ae | 7752 | |
df7492f9 KH |
7753 | while (p < pend && ASCII_BYTE_P (*p)) p++; |
7754 | while (p < pend && ASCII_BYTE_P (*(pend - 1))) pend--; | |
d46c5b12 | 7755 | |
05e6f5dc | 7756 | while (p < pend) |
72d1a715 | 7757 | { |
df7492f9 KH |
7758 | if (ASCII_BYTE_P (*p)) |
7759 | p++; | |
72d1a715 RS |
7760 | else |
7761 | { | |
df7492f9 | 7762 | c = STRING_CHAR_ADVANCE (p); |
12410ef1 | 7763 | |
df7492f9 KH |
7764 | charset_map_loaded = 0; |
7765 | for (tail = coding_attrs_list; CONSP (tail);) | |
7766 | { | |
7767 | elt = XCAR (tail); | |
7768 | if (NILP (elt)) | |
7769 | tail = XCDR (tail); | |
7770 | else if (char_encodable_p (c, elt)) | |
7771 | tail = XCDR (tail); | |
7772 | else if (CONSP (XCDR (tail))) | |
7773 | { | |
7774 | XSETCAR (tail, XCAR (XCDR (tail))); | |
7775 | XSETCDR (tail, XCDR (XCDR (tail))); | |
7776 | } | |
7777 | else | |
7778 | { | |
7779 | XSETCAR (tail, Qnil); | |
7780 | tail = XCDR (tail); | |
7781 | } | |
7782 | } | |
7783 | if (charset_map_loaded) | |
7784 | { | |
7785 | EMACS_INT p_offset = p - pbeg, pend_offset = pend - pbeg; | |
05e6f5dc | 7786 | |
df7492f9 | 7787 | if (STRINGP (start)) |
8f924df7 | 7788 | pbeg = SDATA (start); |
df7492f9 KH |
7789 | else |
7790 | pbeg = BYTE_POS_ADDR (start_byte); | |
7791 | p = pbeg + p_offset; | |
7792 | pend = pbeg + pend_offset; | |
7793 | } | |
7794 | } | |
ec6d2bb8 | 7795 | } |
fb88bf2d | 7796 | |
988b3759 | 7797 | safe_codings = list2 (Qraw_text, Qno_conversion); |
df7492f9 KH |
7798 | for (tail = coding_attrs_list; CONSP (tail); tail = XCDR (tail)) |
7799 | if (! NILP (XCAR (tail))) | |
7800 | safe_codings = Fcons (CODING_ATTR_BASE_NAME (XCAR (tail)), safe_codings); | |
ec6d2bb8 | 7801 | |
05e6f5dc KH |
7802 | return safe_codings; |
7803 | } | |
4956c225 | 7804 | |
d46c5b12 | 7805 | |
8f924df7 KH |
7806 | DEFUN ("unencodable-char-position", Funencodable_char_position, |
7807 | Sunencodable_char_position, 3, 5, 0, | |
7808 | doc: /* | |
7809 | Return position of first un-encodable character in a region. | |
7810 | START and END specfiy the region and CODING-SYSTEM specifies the | |
7811 | encoding to check. Return nil if CODING-SYSTEM does encode the region. | |
d46c5b12 | 7812 | |
8f924df7 KH |
7813 | If optional 4th argument COUNT is non-nil, it specifies at most how |
7814 | many un-encodable characters to search. In this case, the value is a | |
7815 | list of positions. | |
d46c5b12 | 7816 | |
8f924df7 KH |
7817 | If optional 5th argument STRING is non-nil, it is a string to search |
7818 | for un-encodable characters. In that case, START and END are indexes | |
7819 | to the string. */) | |
7820 | (start, end, coding_system, count, string) | |
7821 | Lisp_Object start, end, coding_system, count, string; | |
7822 | { | |
7823 | int n; | |
7824 | struct coding_system coding; | |
7d64c6ad | 7825 | Lisp_Object attrs, charset_list, translation_table; |
8f924df7 KH |
7826 | Lisp_Object positions; |
7827 | int from, to; | |
7828 | const unsigned char *p, *stop, *pend; | |
7829 | int ascii_compatible; | |
fb88bf2d | 7830 | |
8f924df7 KH |
7831 | setup_coding_system (Fcheck_coding_system (coding_system), &coding); |
7832 | attrs = CODING_ID_ATTRS (coding.id); | |
7833 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) | |
7834 | return Qnil; | |
7835 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); | |
7836 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
2170c8f0 | 7837 | translation_table = get_translation_table (attrs, 1, NULL); |
fb88bf2d | 7838 | |
8f924df7 KH |
7839 | if (NILP (string)) |
7840 | { | |
7841 | validate_region (&start, &end); | |
7842 | from = XINT (start); | |
7843 | to = XINT (end); | |
7844 | if (NILP (current_buffer->enable_multibyte_characters) | |
7845 | || (ascii_compatible | |
7846 | && (to - from) == (CHAR_TO_BYTE (to) - (CHAR_TO_BYTE (from))))) | |
7847 | return Qnil; | |
7848 | p = CHAR_POS_ADDR (from); | |
7849 | pend = CHAR_POS_ADDR (to); | |
7850 | if (from < GPT && to >= GPT) | |
7851 | stop = GPT_ADDR; | |
7852 | else | |
7853 | stop = pend; | |
7854 | } | |
7855 | else | |
7856 | { | |
7857 | CHECK_STRING (string); | |
7858 | CHECK_NATNUM (start); | |
7859 | CHECK_NATNUM (end); | |
7860 | from = XINT (start); | |
7861 | to = XINT (end); | |
7862 | if (from > to | |
7863 | || to > SCHARS (string)) | |
7864 | args_out_of_range_3 (string, start, end); | |
7865 | if (! STRING_MULTIBYTE (string)) | |
7866 | return Qnil; | |
7867 | p = SDATA (string) + string_char_to_byte (string, from); | |
7868 | stop = pend = SDATA (string) + string_char_to_byte (string, to); | |
7869 | if (ascii_compatible && (to - from) == (pend - p)) | |
7870 | return Qnil; | |
7871 | } | |
f2558efd | 7872 | |
8f924df7 KH |
7873 | if (NILP (count)) |
7874 | n = 1; | |
7875 | else | |
b73bfc1c | 7876 | { |
8f924df7 KH |
7877 | CHECK_NATNUM (count); |
7878 | n = XINT (count); | |
b73bfc1c KH |
7879 | } |
7880 | ||
8f924df7 KH |
7881 | positions = Qnil; |
7882 | while (1) | |
d46c5b12 | 7883 | { |
8f924df7 | 7884 | int c; |
ec6d2bb8 | 7885 | |
8f924df7 KH |
7886 | if (ascii_compatible) |
7887 | while (p < stop && ASCII_BYTE_P (*p)) | |
7888 | p++, from++; | |
7889 | if (p >= stop) | |
0e79d667 | 7890 | { |
8f924df7 KH |
7891 | if (p >= pend) |
7892 | break; | |
7893 | stop = pend; | |
7894 | p = GAP_END_ADDR; | |
0e79d667 | 7895 | } |
ec6d2bb8 | 7896 | |
8f924df7 KH |
7897 | c = STRING_CHAR_ADVANCE (p); |
7898 | if (! (ASCII_CHAR_P (c) && ascii_compatible) | |
7d64c6ad KH |
7899 | && ! char_charset (translate_char (translation_table, c), |
7900 | charset_list, NULL)) | |
ec6d2bb8 | 7901 | { |
8f924df7 KH |
7902 | positions = Fcons (make_number (from), positions); |
7903 | n--; | |
7904 | if (n == 0) | |
7905 | break; | |
ec6d2bb8 KH |
7906 | } |
7907 | ||
8f924df7 KH |
7908 | from++; |
7909 | } | |
d46c5b12 | 7910 | |
8f924df7 KH |
7911 | return (NILP (count) ? Fcar (positions) : Fnreverse (positions)); |
7912 | } | |
d46c5b12 | 7913 | |
d46c5b12 | 7914 | |
df7492f9 KH |
7915 | DEFUN ("check-coding-systems-region", Fcheck_coding_systems_region, |
7916 | Scheck_coding_systems_region, 3, 3, 0, | |
7917 | doc: /* Check if the region is encodable by coding systems. | |
d46c5b12 | 7918 | |
df7492f9 KH |
7919 | START and END are buffer positions specifying the region. |
7920 | CODING-SYSTEM-LIST is a list of coding systems to check. | |
d46c5b12 | 7921 | |
df7492f9 KH |
7922 | The value is an alist ((CODING-SYSTEM POS0 POS1 ...) ...), where |
7923 | CODING-SYSTEM is a member of CODING-SYSTEM-LIst and can't encode the | |
7924 | whole region, POS0, POS1, ... are buffer positions where non-encodable | |
7925 | characters are found. | |
93dec019 | 7926 | |
df7492f9 KH |
7927 | If all coding systems in CODING-SYSTEM-LIST can encode the region, the |
7928 | value is nil. | |
93dec019 | 7929 | |
df7492f9 KH |
7930 | START may be a string. In that case, check if the string is |
7931 | encodable, and the value contains indices to the string instead of | |
7932 | buffer positions. END is ignored. */) | |
7933 | (start, end, coding_system_list) | |
7934 | Lisp_Object start, end, coding_system_list; | |
05e6f5dc | 7935 | { |
df7492f9 KH |
7936 | Lisp_Object list; |
7937 | EMACS_INT start_byte, end_byte; | |
7938 | int pos; | |
7c78e542 | 7939 | const unsigned char *p, *pbeg, *pend; |
df7492f9 | 7940 | int c; |
7d64c6ad | 7941 | Lisp_Object tail, elt, attrs; |
70ad9fc4 | 7942 | |
05e6f5dc KH |
7943 | if (STRINGP (start)) |
7944 | { | |
df7492f9 | 7945 | if (!STRING_MULTIBYTE (start) |
8f924df7 | 7946 | && SCHARS (start) != SBYTES (start)) |
df7492f9 KH |
7947 | return Qnil; |
7948 | start_byte = 0; | |
8f924df7 | 7949 | end_byte = SBYTES (start); |
df7492f9 | 7950 | pos = 0; |
d46c5b12 | 7951 | } |
05e6f5dc | 7952 | else |
b73bfc1c | 7953 | { |
b7826503 PJ |
7954 | CHECK_NUMBER_COERCE_MARKER (start); |
7955 | CHECK_NUMBER_COERCE_MARKER (end); | |
05e6f5dc KH |
7956 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) |
7957 | args_out_of_range (start, end); | |
7958 | if (NILP (current_buffer->enable_multibyte_characters)) | |
df7492f9 KH |
7959 | return Qnil; |
7960 | start_byte = CHAR_TO_BYTE (XINT (start)); | |
7961 | end_byte = CHAR_TO_BYTE (XINT (end)); | |
7962 | if (XINT (end) - XINT (start) == end_byte - start_byte) | |
05e6f5dc | 7963 | return Qt; |
df7492f9 | 7964 | |
e1c23804 | 7965 | if (XINT (start) < GPT && XINT (end) > GPT) |
b73bfc1c | 7966 | { |
e1c23804 DL |
7967 | if ((GPT - XINT (start)) < (XINT (end) - GPT)) |
7968 | move_gap_both (XINT (start), start_byte); | |
df7492f9 | 7969 | else |
e1c23804 | 7970 | move_gap_both (XINT (end), end_byte); |
b73bfc1c | 7971 | } |
e1c23804 | 7972 | pos = XINT (start); |
b73bfc1c | 7973 | } |
7553d0e1 | 7974 | |
df7492f9 KH |
7975 | list = Qnil; |
7976 | for (tail = coding_system_list; CONSP (tail); tail = XCDR (tail)) | |
12410ef1 | 7977 | { |
df7492f9 | 7978 | elt = XCAR (tail); |
7d64c6ad | 7979 | attrs = AREF (CODING_SYSTEM_SPEC (elt), 0); |
2170c8f0 KH |
7980 | ASET (attrs, coding_attr_trans_tbl, |
7981 | get_translation_table (attrs, 1, NULL)); | |
7d64c6ad | 7982 | list = Fcons (Fcons (elt, Fcons (attrs, Qnil)), list); |
12410ef1 KH |
7983 | } |
7984 | ||
df7492f9 | 7985 | if (STRINGP (start)) |
8f924df7 | 7986 | p = pbeg = SDATA (start); |
72d1a715 | 7987 | else |
df7492f9 KH |
7988 | p = pbeg = BYTE_POS_ADDR (start_byte); |
7989 | pend = p + (end_byte - start_byte); | |
4ed46869 | 7990 | |
df7492f9 KH |
7991 | while (p < pend && ASCII_BYTE_P (*p)) p++, pos++; |
7992 | while (p < pend && ASCII_BYTE_P (*(pend - 1))) pend--; | |
ec6d2bb8 | 7993 | |
df7492f9 | 7994 | while (p < pend) |
d46c5b12 | 7995 | { |
df7492f9 KH |
7996 | if (ASCII_BYTE_P (*p)) |
7997 | p++; | |
e133c8fa | 7998 | else |
05e6f5dc | 7999 | { |
df7492f9 KH |
8000 | c = STRING_CHAR_ADVANCE (p); |
8001 | ||
8002 | charset_map_loaded = 0; | |
8003 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
8004 | { | |
8005 | elt = XCDR (XCAR (tail)); | |
8006 | if (! char_encodable_p (c, XCAR (elt))) | |
8007 | XSETCDR (elt, Fcons (make_number (pos), XCDR (elt))); | |
8008 | } | |
8009 | if (charset_map_loaded) | |
8010 | { | |
8011 | EMACS_INT p_offset = p - pbeg, pend_offset = pend - pbeg; | |
8012 | ||
8013 | if (STRINGP (start)) | |
8f924df7 | 8014 | pbeg = SDATA (start); |
df7492f9 KH |
8015 | else |
8016 | pbeg = BYTE_POS_ADDR (start_byte); | |
8017 | p = pbeg + p_offset; | |
8018 | pend = pbeg + pend_offset; | |
8019 | } | |
05e6f5dc | 8020 | } |
df7492f9 | 8021 | pos++; |
d46c5b12 | 8022 | } |
4ed46869 | 8023 | |
df7492f9 KH |
8024 | tail = list; |
8025 | list = Qnil; | |
8026 | for (; CONSP (tail); tail = XCDR (tail)) | |
ec6d2bb8 | 8027 | { |
df7492f9 KH |
8028 | elt = XCAR (tail); |
8029 | if (CONSP (XCDR (XCDR (elt)))) | |
8030 | list = Fcons (Fcons (XCAR (elt), Fnreverse (XCDR (XCDR (elt)))), | |
8031 | list); | |
ec6d2bb8 | 8032 | } |
2b4f9037 | 8033 | |
df7492f9 | 8034 | return list; |
d46c5b12 KH |
8035 | } |
8036 | ||
3fd9494b | 8037 | |
b73bfc1c | 8038 | Lisp_Object |
df7492f9 KH |
8039 | code_convert_region (start, end, coding_system, dst_object, encodep, norecord) |
8040 | Lisp_Object start, end, coding_system, dst_object; | |
8041 | int encodep, norecord; | |
4ed46869 | 8042 | { |
3a73fa5d | 8043 | struct coding_system coding; |
df7492f9 KH |
8044 | EMACS_INT from, from_byte, to, to_byte; |
8045 | Lisp_Object src_object; | |
4ed46869 | 8046 | |
b7826503 PJ |
8047 | CHECK_NUMBER_COERCE_MARKER (start); |
8048 | CHECK_NUMBER_COERCE_MARKER (end); | |
df7492f9 KH |
8049 | if (NILP (coding_system)) |
8050 | coding_system = Qno_conversion; | |
8051 | else | |
8052 | CHECK_CODING_SYSTEM (coding_system); | |
8053 | src_object = Fcurrent_buffer (); | |
8054 | if (NILP (dst_object)) | |
8055 | dst_object = src_object; | |
8056 | else if (! EQ (dst_object, Qt)) | |
8057 | CHECK_BUFFER (dst_object); | |
3a73fa5d | 8058 | |
d46c5b12 KH |
8059 | validate_region (&start, &end); |
8060 | from = XFASTINT (start); | |
df7492f9 | 8061 | from_byte = CHAR_TO_BYTE (from); |
d46c5b12 | 8062 | to = XFASTINT (end); |
df7492f9 | 8063 | to_byte = CHAR_TO_BYTE (to); |
764ca8da | 8064 | |
df7492f9 KH |
8065 | setup_coding_system (coding_system, &coding); |
8066 | coding.mode |= CODING_MODE_LAST_BLOCK; | |
ec6d2bb8 | 8067 | |
df7492f9 KH |
8068 | if (encodep) |
8069 | encode_coding_object (&coding, src_object, from, from_byte, to, to_byte, | |
8070 | dst_object); | |
8071 | else | |
8072 | decode_coding_object (&coding, src_object, from, from_byte, to, to_byte, | |
8073 | dst_object); | |
8074 | if (! norecord) | |
8075 | Vlast_coding_system_used = CODING_ID_NAME (coding.id); | |
ec6d2bb8 | 8076 | |
df7492f9 KH |
8077 | return (BUFFERP (dst_object) |
8078 | ? make_number (coding.produced_char) | |
8079 | : coding.dst_object); | |
4031e2bf | 8080 | } |
78108bcd | 8081 | |
4ed46869 | 8082 | |
4031e2bf | 8083 | DEFUN ("decode-coding-region", Fdecode_coding_region, Sdecode_coding_region, |
df7492f9 | 8084 | 3, 4, "r\nzCoding system: ", |
48b0f3ae | 8085 | doc: /* Decode the current region from the specified coding system. |
df7492f9 KH |
8086 | When called from a program, takes four arguments: |
8087 | START, END, CODING-SYSTEM, and DESTINATION. | |
8088 | START and END are buffer positions. | |
8844fa83 | 8089 | |
df7492f9 | 8090 | Optional 4th arguments DESTINATION specifies where the decoded text goes. |
2354b80b | 8091 | If nil, the region between START and END is replaced by the decoded text. |
df7492f9 KH |
8092 | If buffer, the decoded text is inserted in the buffer. |
8093 | If t, the decoded text is returned. | |
8844fa83 | 8094 | |
48b0f3ae PJ |
8095 | This function sets `last-coding-system-used' to the precise coding system |
8096 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
8097 | not fully specified.) | |
8098 | It returns the length of the decoded text. */) | |
df7492f9 KH |
8099 | (start, end, coding_system, destination) |
8100 | Lisp_Object start, end, coding_system, destination; | |
4031e2bf | 8101 | { |
df7492f9 | 8102 | return code_convert_region (start, end, coding_system, destination, 0, 0); |
3a73fa5d | 8103 | } |
8844fa83 | 8104 | |
3a73fa5d | 8105 | DEFUN ("encode-coding-region", Fencode_coding_region, Sencode_coding_region, |
df7492f9 KH |
8106 | 3, 4, "r\nzCoding system: ", |
8107 | doc: /* Encode the current region by specified coding system. | |
48b0f3ae PJ |
8108 | When called from a program, takes three arguments: |
8109 | START, END, and CODING-SYSTEM. START and END are buffer positions. | |
d46c5b12 | 8110 | |
df7492f9 KH |
8111 | Optional 4th arguments DESTINATION specifies where the encoded text goes. |
8112 | If nil, the region between START and END is replace by the encoded text. | |
8113 | If buffer, the encoded text is inserted in the buffer. | |
8114 | If t, the encoded text is returned. | |
2391eaa4 | 8115 | |
48b0f3ae PJ |
8116 | This function sets `last-coding-system-used' to the precise coding system |
8117 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
8118 | not fully specified.) | |
8119 | It returns the length of the encoded text. */) | |
df7492f9 KH |
8120 | (start, end, coding_system, destination) |
8121 | Lisp_Object start, end, coding_system, destination; | |
3a73fa5d | 8122 | { |
df7492f9 | 8123 | return code_convert_region (start, end, coding_system, destination, 1, 0); |
b73bfc1c KH |
8124 | } |
8125 | ||
8126 | Lisp_Object | |
df7492f9 KH |
8127 | code_convert_string (string, coding_system, dst_object, |
8128 | encodep, nocopy, norecord) | |
8129 | Lisp_Object string, coding_system, dst_object; | |
8130 | int encodep, nocopy, norecord; | |
b73bfc1c | 8131 | { |
4031e2bf | 8132 | struct coding_system coding; |
df7492f9 | 8133 | EMACS_INT chars, bytes; |
ec6d2bb8 | 8134 | |
b7826503 | 8135 | CHECK_STRING (string); |
d46c5b12 | 8136 | if (NILP (coding_system)) |
4956c225 | 8137 | { |
df7492f9 KH |
8138 | if (! norecord) |
8139 | Vlast_coding_system_used = Qno_conversion; | |
8140 | if (NILP (dst_object)) | |
8141 | return (nocopy ? Fcopy_sequence (string) : string); | |
4956c225 | 8142 | } |
b73bfc1c | 8143 | |
df7492f9 KH |
8144 | if (NILP (coding_system)) |
8145 | coding_system = Qno_conversion; | |
8146 | else | |
8147 | CHECK_CODING_SYSTEM (coding_system); | |
8148 | if (NILP (dst_object)) | |
8149 | dst_object = Qt; | |
8150 | else if (! EQ (dst_object, Qt)) | |
8151 | CHECK_BUFFER (dst_object); | |
73be902c | 8152 | |
df7492f9 | 8153 | setup_coding_system (coding_system, &coding); |
d46c5b12 | 8154 | coding.mode |= CODING_MODE_LAST_BLOCK; |
8f924df7 KH |
8155 | chars = SCHARS (string); |
8156 | bytes = SBYTES (string); | |
df7492f9 KH |
8157 | if (encodep) |
8158 | encode_coding_object (&coding, string, 0, 0, chars, bytes, dst_object); | |
8159 | else | |
8160 | decode_coding_object (&coding, string, 0, 0, chars, bytes, dst_object); | |
8161 | if (! norecord) | |
8162 | Vlast_coding_system_used = CODING_ID_NAME (coding.id); | |
73be902c | 8163 | |
df7492f9 KH |
8164 | return (BUFFERP (dst_object) |
8165 | ? make_number (coding.produced_char) | |
8166 | : coding.dst_object); | |
4ed46869 | 8167 | } |
73be902c | 8168 | |
b73bfc1c | 8169 | |
ecec61c1 | 8170 | /* Encode or decode STRING according to CODING_SYSTEM. |
ec6d2bb8 | 8171 | Do not set Vlast_coding_system_used. |
4ed46869 | 8172 | |
ec6d2bb8 KH |
8173 | This function is called only from macros DECODE_FILE and |
8174 | ENCODE_FILE, thus we ignore character composition. */ | |
4ed46869 | 8175 | |
ecec61c1 KH |
8176 | Lisp_Object |
8177 | code_convert_string_norecord (string, coding_system, encodep) | |
8178 | Lisp_Object string, coding_system; | |
8179 | int encodep; | |
4ed46869 | 8180 | { |
0be8721c | 8181 | return code_convert_string (string, coding_system, Qt, encodep, 0, 1); |
4ed46869 KH |
8182 | } |
8183 | ||
4ed46869 | 8184 | |
df7492f9 KH |
8185 | DEFUN ("decode-coding-string", Fdecode_coding_string, Sdecode_coding_string, |
8186 | 2, 4, 0, | |
8187 | doc: /* Decode STRING which is encoded in CODING-SYSTEM, and return the result. | |
8188 | ||
8189 | Optional third arg NOCOPY non-nil means it is OK to return STRING itself | |
8190 | if the decoding operation is trivial. | |
ecec61c1 | 8191 | |
df7492f9 | 8192 | Optional fourth arg BUFFER non-nil meant that the decoded text is |
a3f6ee6d | 8193 | inserted in BUFFER instead of returned as a string. In this case, |
df7492f9 | 8194 | the return value is BUFFER. |
ecec61c1 | 8195 | |
df7492f9 KH |
8196 | This function sets `last-coding-system-used' to the precise coding system |
8197 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
8198 | not fully specified. */) | |
8199 | (string, coding_system, nocopy, buffer) | |
8200 | Lisp_Object string, coding_system, nocopy, buffer; | |
4ed46869 | 8201 | { |
df7492f9 KH |
8202 | return code_convert_string (string, coding_system, buffer, |
8203 | 0, ! NILP (nocopy), 0); | |
4ed46869 KH |
8204 | } |
8205 | ||
df7492f9 KH |
8206 | DEFUN ("encode-coding-string", Fencode_coding_string, Sencode_coding_string, |
8207 | 2, 4, 0, | |
8208 | doc: /* Encode STRING to CODING-SYSTEM, and return the result. | |
8209 | ||
8210 | Optional third arg NOCOPY non-nil means it is OK to return STRING | |
8211 | itself if the encoding operation is trivial. | |
8212 | ||
8213 | Optional fourth arg BUFFER non-nil meant that the encoded text is | |
a3f6ee6d | 8214 | inserted in BUFFER instead of returned as a string. In this case, |
df7492f9 KH |
8215 | the return value is BUFFER. |
8216 | ||
8217 | This function sets `last-coding-system-used' to the precise coding system | |
8218 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
8219 | not fully specified.) */) | |
8220 | (string, coding_system, nocopy, buffer) | |
8221 | Lisp_Object string, coding_system, nocopy, buffer; | |
4ed46869 | 8222 | { |
df7492f9 | 8223 | return code_convert_string (string, coding_system, buffer, |
c197f191 | 8224 | 1, ! NILP (nocopy), 1); |
4ed46869 | 8225 | } |
df7492f9 | 8226 | |
3a73fa5d | 8227 | \f |
4ed46869 | 8228 | DEFUN ("decode-sjis-char", Fdecode_sjis_char, Sdecode_sjis_char, 1, 1, 0, |
48b0f3ae PJ |
8229 | doc: /* Decode a Japanese character which has CODE in shift_jis encoding. |
8230 | Return the corresponding character. */) | |
8231 | (code) | |
4ed46869 | 8232 | Lisp_Object code; |
4ed46869 | 8233 | { |
df7492f9 KH |
8234 | Lisp_Object spec, attrs, val; |
8235 | struct charset *charset_roman, *charset_kanji, *charset_kana, *charset; | |
8236 | int c; | |
4ed46869 | 8237 | |
df7492f9 KH |
8238 | CHECK_NATNUM (code); |
8239 | c = XFASTINT (code); | |
8240 | CHECK_CODING_SYSTEM_GET_SPEC (Vsjis_coding_system, spec); | |
8241 | attrs = AREF (spec, 0); | |
4ed46869 | 8242 | |
df7492f9 KH |
8243 | if (ASCII_BYTE_P (c) |
8244 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
8245 | return code; | |
4ed46869 | 8246 | |
df7492f9 KH |
8247 | val = CODING_ATTR_CHARSET_LIST (attrs); |
8248 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
004068e4 KH |
8249 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); |
8250 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))); | |
fa42c37f | 8251 | |
df7492f9 KH |
8252 | if (c <= 0x7F) |
8253 | charset = charset_roman; | |
8254 | else if (c >= 0xA0 && c < 0xDF) | |
55ab7be3 | 8255 | { |
df7492f9 KH |
8256 | charset = charset_kana; |
8257 | c -= 0x80; | |
4ed46869 | 8258 | } |
55ab7be3 | 8259 | else |
4ed46869 | 8260 | { |
004068e4 | 8261 | int s1 = c >> 8, s2 = c & 0xFF; |
df7492f9 KH |
8262 | |
8263 | if (s1 < 0x81 || (s1 > 0x9F && s1 < 0xE0) || s1 > 0xEF | |
8264 | || s2 < 0x40 || s2 == 0x7F || s2 > 0xFC) | |
8265 | error ("Invalid code: %d", code); | |
8266 | SJIS_TO_JIS (c); | |
8267 | charset = charset_kanji; | |
4ed46869 | 8268 | } |
df7492f9 KH |
8269 | c = DECODE_CHAR (charset, c); |
8270 | if (c < 0) | |
8271 | error ("Invalid code: %d", code); | |
8272 | return make_number (c); | |
93dec019 | 8273 | } |
4ed46869 | 8274 | |
48b0f3ae | 8275 | |
4ed46869 | 8276 | DEFUN ("encode-sjis-char", Fencode_sjis_char, Sencode_sjis_char, 1, 1, 0, |
8acf0c0e | 8277 | doc: /* Encode a Japanese character CH to shift_jis encoding. |
48b0f3ae PJ |
8278 | Return the corresponding code in SJIS. */) |
8279 | (ch) | |
df7492f9 | 8280 | Lisp_Object ch; |
4ed46869 | 8281 | { |
df7492f9 KH |
8282 | Lisp_Object spec, attrs, charset_list; |
8283 | int c; | |
8284 | struct charset *charset; | |
8285 | unsigned code; | |
48b0f3ae | 8286 | |
df7492f9 KH |
8287 | CHECK_CHARACTER (ch); |
8288 | c = XFASTINT (ch); | |
8289 | CHECK_CODING_SYSTEM_GET_SPEC (Vsjis_coding_system, spec); | |
8290 | attrs = AREF (spec, 0); | |
8291 | ||
8292 | if (ASCII_CHAR_P (c) | |
8293 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
8294 | return ch; | |
8295 | ||
8296 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
8297 | charset = char_charset (c, charset_list, &code); | |
8298 | if (code == CHARSET_INVALID_CODE (charset)) | |
8299 | error ("Can't encode by shift_jis encoding: %d", c); | |
8300 | JIS_TO_SJIS (code); | |
8301 | ||
8302 | return make_number (code); | |
4ed46869 KH |
8303 | } |
8304 | ||
8305 | DEFUN ("decode-big5-char", Fdecode_big5_char, Sdecode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
8306 | doc: /* Decode a Big5 character which has CODE in BIG5 coding system. |
8307 | Return the corresponding character. */) | |
8308 | (code) | |
4ed46869 | 8309 | Lisp_Object code; |
d46c5b12 | 8310 | { |
df7492f9 KH |
8311 | Lisp_Object spec, attrs, val; |
8312 | struct charset *charset_roman, *charset_big5, *charset; | |
8313 | int c; | |
6289dd10 | 8314 | |
df7492f9 KH |
8315 | CHECK_NATNUM (code); |
8316 | c = XFASTINT (code); | |
8317 | CHECK_CODING_SYSTEM_GET_SPEC (Vbig5_coding_system, spec); | |
8318 | attrs = AREF (spec, 0); | |
4ed46869 | 8319 | |
df7492f9 KH |
8320 | if (ASCII_BYTE_P (c) |
8321 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
8322 | return code; | |
6289dd10 | 8323 | |
df7492f9 KH |
8324 | val = CODING_ATTR_CHARSET_LIST (attrs); |
8325 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
8326 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
c210f766 | 8327 | |
df7492f9 KH |
8328 | if (c <= 0x7F) |
8329 | charset = charset_roman; | |
c28a9453 KH |
8330 | else |
8331 | { | |
df7492f9 KH |
8332 | int b1 = c >> 8, b2 = c & 0x7F; |
8333 | if (b1 < 0xA1 || b1 > 0xFE | |
8334 | || b2 < 0x40 || (b2 > 0x7E && b2 < 0xA1) || b2 > 0xFE) | |
8335 | error ("Invalid code: %d", code); | |
8336 | charset = charset_big5; | |
c28a9453 | 8337 | } |
df7492f9 KH |
8338 | c = DECODE_CHAR (charset, (unsigned )c); |
8339 | if (c < 0) | |
8340 | error ("Invalid code: %d", code); | |
8341 | return make_number (c); | |
d46c5b12 | 8342 | } |
6289dd10 | 8343 | |
4ed46869 | 8344 | DEFUN ("encode-big5-char", Fencode_big5_char, Sencode_big5_char, 1, 1, 0, |
8acf0c0e | 8345 | doc: /* Encode the Big5 character CH to BIG5 coding system. |
48b0f3ae PJ |
8346 | Return the corresponding character code in Big5. */) |
8347 | (ch) | |
4ed46869 KH |
8348 | Lisp_Object ch; |
8349 | { | |
df7492f9 KH |
8350 | Lisp_Object spec, attrs, charset_list; |
8351 | struct charset *charset; | |
8352 | int c; | |
8353 | unsigned code; | |
8354 | ||
8355 | CHECK_CHARACTER (ch); | |
8356 | c = XFASTINT (ch); | |
8357 | CHECK_CODING_SYSTEM_GET_SPEC (Vbig5_coding_system, spec); | |
8358 | attrs = AREF (spec, 0); | |
8359 | if (ASCII_CHAR_P (c) | |
8360 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
8361 | return ch; | |
8362 | ||
8363 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
8364 | charset = char_charset (c, charset_list, &code); | |
8365 | if (code == CHARSET_INVALID_CODE (charset)) | |
8366 | error ("Can't encode by Big5 encoding: %d", c); | |
8367 | ||
8368 | return make_number (code); | |
4ed46869 | 8369 | } |
48b0f3ae | 8370 | |
3a73fa5d | 8371 | \f |
002fdb44 | 8372 | DEFUN ("set-terminal-coding-system-internal", Fset_terminal_coding_system_internal, |
68bba4e4 | 8373 | Sset_terminal_coding_system_internal, 1, 2, 0, |
48b0f3ae | 8374 | doc: /* Internal use only. */) |
6ed8eeff | 8375 | (coding_system, terminal) |
b74e4686 | 8376 | Lisp_Object coding_system; |
6ed8eeff | 8377 | Lisp_Object terminal; |
4ed46869 | 8378 | { |
6ed8eeff | 8379 | struct coding_system *terminal_coding = TERMINAL_TERMINAL_CODING (get_terminal (terminal, 1)); |
b7826503 | 8380 | CHECK_SYMBOL (coding_system); |
b8299c66 | 8381 | setup_coding_system (Fcheck_coding_system (coding_system), terminal_coding); |
70c22245 | 8382 | /* We had better not send unsafe characters to terminal. */ |
c73bd236 | 8383 | terminal_coding->mode |= CODING_MODE_SAFE_ENCODING; |
df7492f9 | 8384 | /* Characer composition should be disabled. */ |
c73bd236 | 8385 | terminal_coding->common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; |
b8299c66 KL |
8386 | terminal_coding->src_multibyte = 1; |
8387 | terminal_coding->dst_multibyte = 0; | |
4ed46869 KH |
8388 | return Qnil; |
8389 | } | |
8390 | ||
c4825358 KH |
8391 | DEFUN ("set-safe-terminal-coding-system-internal", |
8392 | Fset_safe_terminal_coding_system_internal, | |
48b0f3ae | 8393 | Sset_safe_terminal_coding_system_internal, 1, 1, 0, |
ddb67bdc | 8394 | doc: /* Internal use only. */) |
48b0f3ae | 8395 | (coding_system) |
b74e4686 | 8396 | Lisp_Object coding_system; |
d46c5b12 | 8397 | { |
b7826503 | 8398 | CHECK_SYMBOL (coding_system); |
c4825358 KH |
8399 | setup_coding_system (Fcheck_coding_system (coding_system), |
8400 | &safe_terminal_coding); | |
df7492f9 KH |
8401 | /* Characer composition should be disabled. */ |
8402 | safe_terminal_coding.common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
b73bfc1c KH |
8403 | safe_terminal_coding.src_multibyte = 1; |
8404 | safe_terminal_coding.dst_multibyte = 0; | |
c4825358 KH |
8405 | return Qnil; |
8406 | } | |
4ed46869 | 8407 | |
002fdb44 | 8408 | DEFUN ("terminal-coding-system", Fterminal_coding_system, |
68bba4e4 | 8409 | Sterminal_coding_system, 0, 1, 0, |
6ed8eeff KL |
8410 | doc: /* Return coding system specified for terminal output on the given terminal. |
8411 | TERMINAL may be a terminal id, a frame, or nil for the selected | |
8412 | frame's terminal device. */) | |
8413 | (terminal) | |
8414 | Lisp_Object terminal; | |
4ed46869 | 8415 | { |
985773c9 MB |
8416 | struct coding_system *terminal_coding |
8417 | = TERMINAL_TERMINAL_CODING (get_terminal (terminal, 1)); | |
8418 | Lisp_Object coding_system = CODING_ID_NAME (terminal_coding->id); | |
ae6f73fa | 8419 | |
ae6f73fa | 8420 | /* For backward compatibility, return nil if it is `undecided'. */ |
f75c90a9 | 8421 | return (! EQ (coding_system, Qundecided) ? coding_system : Qnil); |
4ed46869 KH |
8422 | } |
8423 | ||
002fdb44 | 8424 | DEFUN ("set-keyboard-coding-system-internal", Fset_keyboard_coding_system_internal, |
68bba4e4 | 8425 | Sset_keyboard_coding_system_internal, 1, 2, 0, |
48b0f3ae | 8426 | doc: /* Internal use only. */) |
6ed8eeff | 8427 | (coding_system, terminal) |
4ed46869 | 8428 | Lisp_Object coding_system; |
6ed8eeff | 8429 | Lisp_Object terminal; |
4ed46869 | 8430 | { |
6ed8eeff | 8431 | struct terminal *t = get_terminal (terminal, 1); |
b7826503 | 8432 | CHECK_SYMBOL (coding_system); |
df7492f9 | 8433 | setup_coding_system (Fcheck_coding_system (coding_system), |
c73bd236 | 8434 | TERMINAL_KEYBOARD_CODING (t)); |
df7492f9 | 8435 | /* Characer composition should be disabled. */ |
c73bd236 MB |
8436 | TERMINAL_KEYBOARD_CODING (t)->common_flags |
8437 | &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
4ed46869 KH |
8438 | return Qnil; |
8439 | } | |
8440 | ||
8441 | DEFUN ("keyboard-coding-system", | |
985773c9 | 8442 | Fkeyboard_coding_system, Skeyboard_coding_system, 0, 1, 0, |
48b0f3ae | 8443 | doc: /* Return coding system specified for decoding keyboard input. */) |
985773c9 MB |
8444 | (terminal) |
8445 | Lisp_Object terminal; | |
4ed46869 | 8446 | { |
985773c9 MB |
8447 | return CODING_ID_NAME (TERMINAL_KEYBOARD_CODING |
8448 | (get_terminal (terminal, 1))->id); | |
4ed46869 KH |
8449 | } |
8450 | ||
4ed46869 | 8451 | \f |
a5d301df KH |
8452 | DEFUN ("find-operation-coding-system", Ffind_operation_coding_system, |
8453 | Sfind_operation_coding_system, 1, MANY, 0, | |
48b0f3ae PJ |
8454 | doc: /* Choose a coding system for an operation based on the target name. |
8455 | The value names a pair of coding systems: (DECODING-SYSTEM . ENCODING-SYSTEM). | |
8456 | DECODING-SYSTEM is the coding system to use for decoding | |
8457 | \(in case OPERATION does decoding), and ENCODING-SYSTEM is the coding system | |
8458 | for encoding (in case OPERATION does encoding). | |
05e6f5dc | 8459 | |
48b0f3ae PJ |
8460 | The first argument OPERATION specifies an I/O primitive: |
8461 | For file I/O, `insert-file-contents' or `write-region'. | |
8462 | For process I/O, `call-process', `call-process-region', or `start-process'. | |
8463 | For network I/O, `open-network-stream'. | |
05e6f5dc | 8464 | |
48b0f3ae PJ |
8465 | The remaining arguments should be the same arguments that were passed |
8466 | to the primitive. Depending on which primitive, one of those arguments | |
8467 | is selected as the TARGET. For example, if OPERATION does file I/O, | |
8468 | whichever argument specifies the file name is TARGET. | |
05e6f5dc | 8469 | |
48b0f3ae | 8470 | TARGET has a meaning which depends on OPERATION: |
b883cdb2 | 8471 | For file I/O, TARGET is a file name (except for the special case below). |
48b0f3ae PJ |
8472 | For process I/O, TARGET is a process name. |
8473 | For network I/O, TARGET is a service name or a port number | |
05e6f5dc | 8474 | |
48b0f3ae PJ |
8475 | This function looks up what specified for TARGET in, |
8476 | `file-coding-system-alist', `process-coding-system-alist', | |
8477 | or `network-coding-system-alist' depending on OPERATION. | |
8478 | They may specify a coding system, a cons of coding systems, | |
8479 | or a function symbol to call. | |
8480 | In the last case, we call the function with one argument, | |
8481 | which is a list of all the arguments given to this function. | |
1011c487 MB |
8482 | If the function can't decide a coding system, it can return |
8483 | `undecided' so that the normal code-detection is performed. | |
48b0f3ae | 8484 | |
b883cdb2 MB |
8485 | If OPERATION is `insert-file-contents', the argument corresponding to |
8486 | TARGET may be a cons (FILENAME . BUFFER). In that case, FILENAME is a | |
8487 | file name to look up, and BUFFER is a buffer that contains the file's | |
8488 | contents (not yet decoded). If `file-coding-system-alist' specifies a | |
8489 | function to call for FILENAME, that function should examine the | |
8490 | contents of BUFFER instead of reading the file. | |
8491 | ||
d918f936 | 8492 | usage: (find-operation-coding-system OPERATION ARGUMENTS...) */) |
48b0f3ae | 8493 | (nargs, args) |
4ed46869 KH |
8494 | int nargs; |
8495 | Lisp_Object *args; | |
6b89e3aa | 8496 | { |
4ed46869 KH |
8497 | Lisp_Object operation, target_idx, target, val; |
8498 | register Lisp_Object chain; | |
177c0ea7 | 8499 | |
4ed46869 KH |
8500 | if (nargs < 2) |
8501 | error ("Too few arguments"); | |
8502 | operation = args[0]; | |
8503 | if (!SYMBOLP (operation) | |
8504 | || !INTEGERP (target_idx = Fget (operation, Qtarget_idx))) | |
df7492f9 | 8505 | error ("Invalid first arguement"); |
4ed46869 KH |
8506 | if (nargs < 1 + XINT (target_idx)) |
8507 | error ("Too few arguments for operation: %s", | |
8f924df7 | 8508 | SDATA (SYMBOL_NAME (operation))); |
4ed46869 KH |
8509 | target = args[XINT (target_idx) + 1]; |
8510 | if (!(STRINGP (target) | |
091a0ff0 KH |
8511 | || (EQ (operation, Qinsert_file_contents) && CONSP (target) |
8512 | && STRINGP (XCAR (target)) && BUFFERP (XCDR (target))) | |
4ed46869 | 8513 | || (EQ (operation, Qopen_network_stream) && INTEGERP (target)))) |
df7492f9 | 8514 | error ("Invalid %dth argument", XINT (target_idx) + 1); |
091a0ff0 KH |
8515 | if (CONSP (target)) |
8516 | target = XCAR (target); | |
4ed46869 | 8517 | |
2e34157c RS |
8518 | chain = ((EQ (operation, Qinsert_file_contents) |
8519 | || EQ (operation, Qwrite_region)) | |
02ba4723 | 8520 | ? Vfile_coding_system_alist |
2e34157c | 8521 | : (EQ (operation, Qopen_network_stream) |
02ba4723 KH |
8522 | ? Vnetwork_coding_system_alist |
8523 | : Vprocess_coding_system_alist)); | |
4ed46869 KH |
8524 | if (NILP (chain)) |
8525 | return Qnil; | |
8526 | ||
03699b14 | 8527 | for (; CONSP (chain); chain = XCDR (chain)) |
6b89e3aa | 8528 | { |
f44d27ce | 8529 | Lisp_Object elt; |
6b89e3aa | 8530 | |
df7492f9 | 8531 | elt = XCAR (chain); |
4ed46869 KH |
8532 | if (CONSP (elt) |
8533 | && ((STRINGP (target) | |
03699b14 KR |
8534 | && STRINGP (XCAR (elt)) |
8535 | && fast_string_match (XCAR (elt), target) >= 0) | |
8536 | || (INTEGERP (target) && EQ (target, XCAR (elt))))) | |
6b89e3aa | 8537 | { |
03699b14 | 8538 | val = XCDR (elt); |
b19fd4c5 KH |
8539 | /* Here, if VAL is both a valid coding system and a valid |
8540 | function symbol, we return VAL as a coding system. */ | |
02ba4723 KH |
8541 | if (CONSP (val)) |
8542 | return val; | |
8543 | if (! SYMBOLP (val)) | |
8544 | return Qnil; | |
8545 | if (! NILP (Fcoding_system_p (val))) | |
8546 | return Fcons (val, val); | |
b19fd4c5 | 8547 | if (! NILP (Ffboundp (val))) |
6b89e3aa | 8548 | { |
e2b97060 MB |
8549 | /* We use call1 rather than safe_call1 |
8550 | so as to get bug reports about functions called here | |
8551 | which don't handle the current interface. */ | |
8552 | val = call1 (val, Flist (nargs, args)); | |
b19fd4c5 KH |
8553 | if (CONSP (val)) |
8554 | return val; | |
8555 | if (SYMBOLP (val) && ! NILP (Fcoding_system_p (val))) | |
8556 | return Fcons (val, val); | |
6b89e3aa | 8557 | } |
02ba4723 | 8558 | return Qnil; |
6b89e3aa KH |
8559 | } |
8560 | } | |
4ed46869 | 8561 | return Qnil; |
6b89e3aa KH |
8562 | } |
8563 | ||
df7492f9 | 8564 | DEFUN ("set-coding-system-priority", Fset_coding_system_priority, |
a3f6ee6d | 8565 | Sset_coding_system_priority, 0, MANY, 0, |
da7db224 | 8566 | doc: /* Assign higher priority to the coding systems given as arguments. |
ff563fce | 8567 | If multiple coding systems belongs to the same category, |
a3181084 DL |
8568 | all but the first one are ignored. |
8569 | ||
8570 | usage: (set-coding-system-priority ...) */) | |
df7492f9 KH |
8571 | (nargs, args) |
8572 | int nargs; | |
8573 | Lisp_Object *args; | |
8574 | { | |
8575 | int i, j; | |
8576 | int changed[coding_category_max]; | |
8577 | enum coding_category priorities[coding_category_max]; | |
8578 | ||
8579 | bzero (changed, sizeof changed); | |
6b89e3aa | 8580 | |
df7492f9 | 8581 | for (i = j = 0; i < nargs; i++) |
6b89e3aa | 8582 | { |
df7492f9 KH |
8583 | enum coding_category category; |
8584 | Lisp_Object spec, attrs; | |
6b89e3aa | 8585 | |
df7492f9 KH |
8586 | CHECK_CODING_SYSTEM_GET_SPEC (args[i], spec); |
8587 | attrs = AREF (spec, 0); | |
8588 | category = XINT (CODING_ATTR_CATEGORY (attrs)); | |
8589 | if (changed[category]) | |
8590 | /* Ignore this coding system because a coding system of the | |
8591 | same category already had a higher priority. */ | |
8592 | continue; | |
8593 | changed[category] = 1; | |
8594 | priorities[j++] = category; | |
8595 | if (coding_categories[category].id >= 0 | |
8596 | && ! EQ (args[i], CODING_ID_NAME (coding_categories[category].id))) | |
8597 | setup_coding_system (args[i], &coding_categories[category]); | |
ff563fce | 8598 | Fset (AREF (Vcoding_category_table, category), args[i]); |
df7492f9 | 8599 | } |
6b89e3aa | 8600 | |
df7492f9 KH |
8601 | /* Now we have decided top J priorities. Reflect the order of the |
8602 | original priorities to the remaining priorities. */ | |
6b89e3aa | 8603 | |
df7492f9 | 8604 | for (i = j, j = 0; i < coding_category_max; i++, j++) |
6b89e3aa | 8605 | { |
df7492f9 KH |
8606 | while (j < coding_category_max |
8607 | && changed[coding_priorities[j]]) | |
8608 | j++; | |
8609 | if (j == coding_category_max) | |
8610 | abort (); | |
8611 | priorities[i] = coding_priorities[j]; | |
8612 | } | |
6b89e3aa | 8613 | |
df7492f9 | 8614 | bcopy (priorities, coding_priorities, sizeof priorities); |
177c0ea7 | 8615 | |
ff563fce KH |
8616 | /* Update `coding-category-list'. */ |
8617 | Vcoding_category_list = Qnil; | |
8618 | for (i = coding_category_max - 1; i >= 0; i--) | |
8619 | Vcoding_category_list | |
8620 | = Fcons (AREF (Vcoding_category_table, priorities[i]), | |
8621 | Vcoding_category_list); | |
6b89e3aa | 8622 | |
df7492f9 | 8623 | return Qnil; |
6b89e3aa KH |
8624 | } |
8625 | ||
df7492f9 KH |
8626 | DEFUN ("coding-system-priority-list", Fcoding_system_priority_list, |
8627 | Scoding_system_priority_list, 0, 1, 0, | |
da7db224 DL |
8628 | doc: /* Return a list of coding systems ordered by their priorities. |
8629 | HIGHESTP non-nil means just return the highest priority one. */) | |
df7492f9 KH |
8630 | (highestp) |
8631 | Lisp_Object highestp; | |
d46c5b12 KH |
8632 | { |
8633 | int i; | |
df7492f9 | 8634 | Lisp_Object val; |
6b89e3aa | 8635 | |
df7492f9 | 8636 | for (i = 0, val = Qnil; i < coding_category_max; i++) |
d46c5b12 | 8637 | { |
df7492f9 KH |
8638 | enum coding_category category = coding_priorities[i]; |
8639 | int id = coding_categories[category].id; | |
8640 | Lisp_Object attrs; | |
068a9dbd | 8641 | |
df7492f9 KH |
8642 | if (id < 0) |
8643 | continue; | |
8644 | attrs = CODING_ID_ATTRS (id); | |
8645 | if (! NILP (highestp)) | |
8646 | return CODING_ATTR_BASE_NAME (attrs); | |
8647 | val = Fcons (CODING_ATTR_BASE_NAME (attrs), val); | |
8648 | } | |
8649 | return Fnreverse (val); | |
8650 | } | |
068a9dbd | 8651 | |
f0064e1f | 8652 | static char *suffixes[] = { "-unix", "-dos", "-mac" }; |
068a9dbd KH |
8653 | |
8654 | static Lisp_Object | |
df7492f9 KH |
8655 | make_subsidiaries (base) |
8656 | Lisp_Object base; | |
068a9dbd | 8657 | { |
df7492f9 | 8658 | Lisp_Object subsidiaries; |
8f924df7 | 8659 | int base_name_len = SBYTES (SYMBOL_NAME (base)); |
df7492f9 KH |
8660 | char *buf = (char *) alloca (base_name_len + 6); |
8661 | int i; | |
068a9dbd | 8662 | |
8f924df7 | 8663 | bcopy (SDATA (SYMBOL_NAME (base)), buf, base_name_len); |
df7492f9 KH |
8664 | subsidiaries = Fmake_vector (make_number (3), Qnil); |
8665 | for (i = 0; i < 3; i++) | |
068a9dbd | 8666 | { |
df7492f9 KH |
8667 | bcopy (suffixes[i], buf + base_name_len, strlen (suffixes[i]) + 1); |
8668 | ASET (subsidiaries, i, intern (buf)); | |
068a9dbd | 8669 | } |
df7492f9 | 8670 | return subsidiaries; |
068a9dbd KH |
8671 | } |
8672 | ||
8673 | ||
df7492f9 KH |
8674 | DEFUN ("define-coding-system-internal", Fdefine_coding_system_internal, |
8675 | Sdefine_coding_system_internal, coding_arg_max, MANY, 0, | |
1fcd6c8b DL |
8676 | doc: /* For internal use only. |
8677 | usage: (define-coding-system-internal ...) */) | |
df7492f9 KH |
8678 | (nargs, args) |
8679 | int nargs; | |
8680 | Lisp_Object *args; | |
068a9dbd | 8681 | { |
df7492f9 KH |
8682 | Lisp_Object name; |
8683 | Lisp_Object spec_vec; /* [ ATTRS ALIASE EOL_TYPE ] */ | |
8684 | Lisp_Object attrs; /* Vector of attributes. */ | |
8685 | Lisp_Object eol_type; | |
8686 | Lisp_Object aliases; | |
8687 | Lisp_Object coding_type, charset_list, safe_charsets; | |
8688 | enum coding_category category; | |
8689 | Lisp_Object tail, val; | |
8690 | int max_charset_id = 0; | |
8691 | int i; | |
068a9dbd | 8692 | |
df7492f9 KH |
8693 | if (nargs < coding_arg_max) |
8694 | goto short_args; | |
068a9dbd | 8695 | |
df7492f9 | 8696 | attrs = Fmake_vector (make_number (coding_attr_last_index), Qnil); |
068a9dbd | 8697 | |
df7492f9 KH |
8698 | name = args[coding_arg_name]; |
8699 | CHECK_SYMBOL (name); | |
8700 | CODING_ATTR_BASE_NAME (attrs) = name; | |
068a9dbd | 8701 | |
df7492f9 KH |
8702 | val = args[coding_arg_mnemonic]; |
8703 | if (! STRINGP (val)) | |
8704 | CHECK_CHARACTER (val); | |
8705 | CODING_ATTR_MNEMONIC (attrs) = val; | |
068a9dbd | 8706 | |
df7492f9 KH |
8707 | coding_type = args[coding_arg_coding_type]; |
8708 | CHECK_SYMBOL (coding_type); | |
8709 | CODING_ATTR_TYPE (attrs) = coding_type; | |
068a9dbd | 8710 | |
df7492f9 KH |
8711 | charset_list = args[coding_arg_charset_list]; |
8712 | if (SYMBOLP (charset_list)) | |
8713 | { | |
8714 | if (EQ (charset_list, Qiso_2022)) | |
8715 | { | |
8716 | if (! EQ (coding_type, Qiso_2022)) | |
8717 | error ("Invalid charset-list"); | |
8718 | charset_list = Viso_2022_charset_list; | |
8719 | } | |
8720 | else if (EQ (charset_list, Qemacs_mule)) | |
8721 | { | |
8722 | if (! EQ (coding_type, Qemacs_mule)) | |
8723 | error ("Invalid charset-list"); | |
8724 | charset_list = Vemacs_mule_charset_list; | |
8725 | } | |
8726 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
8727 | if (max_charset_id < XFASTINT (XCAR (tail))) | |
8728 | max_charset_id = XFASTINT (XCAR (tail)); | |
8729 | } | |
068a9dbd KH |
8730 | else |
8731 | { | |
df7492f9 | 8732 | charset_list = Fcopy_sequence (charset_list); |
985773c9 | 8733 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) |
068a9dbd | 8734 | { |
df7492f9 KH |
8735 | struct charset *charset; |
8736 | ||
985773c9 | 8737 | val = XCAR (tail); |
df7492f9 KH |
8738 | CHECK_CHARSET_GET_CHARSET (val, charset); |
8739 | if (EQ (coding_type, Qiso_2022) | |
8740 | ? CHARSET_ISO_FINAL (charset) < 0 | |
8741 | : EQ (coding_type, Qemacs_mule) | |
8742 | ? CHARSET_EMACS_MULE_ID (charset) < 0 | |
8743 | : 0) | |
8744 | error ("Can't handle charset `%s'", | |
8f924df7 | 8745 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
df7492f9 | 8746 | |
8f924df7 | 8747 | XSETCAR (tail, make_number (charset->id)); |
df7492f9 KH |
8748 | if (max_charset_id < charset->id) |
8749 | max_charset_id = charset->id; | |
068a9dbd KH |
8750 | } |
8751 | } | |
df7492f9 | 8752 | CODING_ATTR_CHARSET_LIST (attrs) = charset_list; |
068a9dbd | 8753 | |
df7492f9 KH |
8754 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), |
8755 | make_number (255)); | |
8756 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
8f924df7 | 8757 | SSET (safe_charsets, XFASTINT (XCAR (tail)), 0); |
df7492f9 | 8758 | CODING_ATTR_SAFE_CHARSETS (attrs) = safe_charsets; |
068a9dbd | 8759 | |
584948ac | 8760 | CODING_ATTR_ASCII_COMPAT (attrs) = args[coding_arg_ascii_compatible_p]; |
3a73fa5d | 8761 | |
df7492f9 | 8762 | val = args[coding_arg_decode_translation_table]; |
a6f87d34 | 8763 | if (! CHAR_TABLE_P (val) && ! CONSP (val)) |
7d64c6ad | 8764 | CHECK_SYMBOL (val); |
df7492f9 | 8765 | CODING_ATTR_DECODE_TBL (attrs) = val; |
3a73fa5d | 8766 | |
df7492f9 | 8767 | val = args[coding_arg_encode_translation_table]; |
a6f87d34 | 8768 | if (! CHAR_TABLE_P (val) && ! CONSP (val)) |
7d64c6ad | 8769 | CHECK_SYMBOL (val); |
df7492f9 | 8770 | CODING_ATTR_ENCODE_TBL (attrs) = val; |
d46c5b12 | 8771 | |
df7492f9 KH |
8772 | val = args[coding_arg_post_read_conversion]; |
8773 | CHECK_SYMBOL (val); | |
8774 | CODING_ATTR_POST_READ (attrs) = val; | |
d46c5b12 | 8775 | |
df7492f9 KH |
8776 | val = args[coding_arg_pre_write_conversion]; |
8777 | CHECK_SYMBOL (val); | |
8778 | CODING_ATTR_PRE_WRITE (attrs) = val; | |
3a73fa5d | 8779 | |
df7492f9 KH |
8780 | val = args[coding_arg_default_char]; |
8781 | if (NILP (val)) | |
8782 | CODING_ATTR_DEFAULT_CHAR (attrs) = make_number (' '); | |
8783 | else | |
8784 | { | |
8f924df7 | 8785 | CHECK_CHARACTER (val); |
df7492f9 KH |
8786 | CODING_ATTR_DEFAULT_CHAR (attrs) = val; |
8787 | } | |
4031e2bf | 8788 | |
8f924df7 KH |
8789 | val = args[coding_arg_for_unibyte]; |
8790 | CODING_ATTR_FOR_UNIBYTE (attrs) = NILP (val) ? Qnil : Qt; | |
3a73fa5d | 8791 | |
df7492f9 KH |
8792 | val = args[coding_arg_plist]; |
8793 | CHECK_LIST (val); | |
8794 | CODING_ATTR_PLIST (attrs) = val; | |
3a73fa5d | 8795 | |
df7492f9 KH |
8796 | if (EQ (coding_type, Qcharset)) |
8797 | { | |
c7c66a95 KH |
8798 | /* Generate a lisp vector of 256 elements. Each element is nil, |
8799 | integer, or a list of charset IDs. | |
3a73fa5d | 8800 | |
c7c66a95 KH |
8801 | If Nth element is nil, the byte code N is invalid in this |
8802 | coding system. | |
4ed46869 | 8803 | |
c7c66a95 KH |
8804 | If Nth element is a number NUM, N is the first byte of a |
8805 | charset whose ID is NUM. | |
4ed46869 | 8806 | |
c7c66a95 KH |
8807 | If Nth element is a list of charset IDs, N is the first byte |
8808 | of one of them. The list is sorted by dimensions of the | |
2bc515e4 | 8809 | charsets. A charset of smaller dimension comes firtst. */ |
df7492f9 | 8810 | val = Fmake_vector (make_number (256), Qnil); |
4ed46869 | 8811 | |
5c99c2e6 | 8812 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) |
df7492f9 | 8813 | { |
c7c66a95 KH |
8814 | struct charset *charset = CHARSET_FROM_ID (XFASTINT (XCAR (tail))); |
8815 | int dim = CHARSET_DIMENSION (charset); | |
8816 | int idx = (dim - 1) * 4; | |
4ed46869 | 8817 | |
5c99c2e6 | 8818 | if (CHARSET_ASCII_COMPATIBLE_P (charset)) |
584948ac | 8819 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; |
4031e2bf | 8820 | |
15d143f7 KH |
8821 | for (i = charset->code_space[idx]; |
8822 | i <= charset->code_space[idx + 1]; i++) | |
8823 | { | |
c7c66a95 KH |
8824 | Lisp_Object tmp, tmp2; |
8825 | int dim2; | |
ec6d2bb8 | 8826 | |
c7c66a95 KH |
8827 | tmp = AREF (val, i); |
8828 | if (NILP (tmp)) | |
8829 | tmp = XCAR (tail); | |
8830 | else if (NUMBERP (tmp)) | |
8831 | { | |
8832 | dim2 = CHARSET_DIMENSION (CHARSET_FROM_ID (XFASTINT (tmp))); | |
8833 | if (dim < dim2) | |
c7c66a95 | 8834 | tmp = Fcons (XCAR (tail), Fcons (tmp, Qnil)); |
f9d71dcd KH |
8835 | else |
8836 | tmp = Fcons (tmp, Fcons (XCAR (tail), Qnil)); | |
c7c66a95 | 8837 | } |
15d143f7 | 8838 | else |
c7c66a95 KH |
8839 | { |
8840 | for (tmp2 = tmp; CONSP (tmp2); tmp2 = XCDR (tmp2)) | |
8841 | { | |
8842 | dim2 = CHARSET_DIMENSION (CHARSET_FROM_ID (XFASTINT (XCAR (tmp2)))); | |
8843 | if (dim < dim2) | |
8844 | break; | |
8845 | } | |
8846 | if (NILP (tmp2)) | |
8847 | tmp = nconc2 (tmp, Fcons (XCAR (tail), Qnil)); | |
8848 | else | |
8849 | { | |
8850 | XSETCDR (tmp2, Fcons (XCAR (tmp2), XCDR (tmp2))); | |
8851 | XSETCAR (tmp2, XCAR (tail)); | |
8852 | } | |
8853 | } | |
8854 | ASET (val, i, tmp); | |
15d143f7 | 8855 | } |
df7492f9 KH |
8856 | } |
8857 | ASET (attrs, coding_attr_charset_valids, val); | |
8858 | category = coding_category_charset; | |
8859 | } | |
8860 | else if (EQ (coding_type, Qccl)) | |
8861 | { | |
8862 | Lisp_Object valids; | |
ecec61c1 | 8863 | |
df7492f9 KH |
8864 | if (nargs < coding_arg_ccl_max) |
8865 | goto short_args; | |
ecec61c1 | 8866 | |
df7492f9 KH |
8867 | val = args[coding_arg_ccl_decoder]; |
8868 | CHECK_CCL_PROGRAM (val); | |
8869 | if (VECTORP (val)) | |
8870 | val = Fcopy_sequence (val); | |
8871 | ASET (attrs, coding_attr_ccl_decoder, val); | |
ecec61c1 | 8872 | |
df7492f9 KH |
8873 | val = args[coding_arg_ccl_encoder]; |
8874 | CHECK_CCL_PROGRAM (val); | |
8875 | if (VECTORP (val)) | |
8876 | val = Fcopy_sequence (val); | |
8877 | ASET (attrs, coding_attr_ccl_encoder, val); | |
ecec61c1 | 8878 | |
df7492f9 KH |
8879 | val = args[coding_arg_ccl_valids]; |
8880 | valids = Fmake_string (make_number (256), make_number (0)); | |
8881 | for (tail = val; !NILP (tail); tail = Fcdr (tail)) | |
8882 | { | |
8dcbea82 | 8883 | int from, to; |
ecec61c1 | 8884 | |
df7492f9 KH |
8885 | val = Fcar (tail); |
8886 | if (INTEGERP (val)) | |
8dcbea82 KH |
8887 | { |
8888 | from = to = XINT (val); | |
8889 | if (from < 0 || from > 255) | |
8890 | args_out_of_range_3 (val, make_number (0), make_number (255)); | |
8891 | } | |
df7492f9 KH |
8892 | else |
8893 | { | |
df7492f9 | 8894 | CHECK_CONS (val); |
8f924df7 KH |
8895 | CHECK_NATNUM_CAR (val); |
8896 | CHECK_NATNUM_CDR (val); | |
df7492f9 | 8897 | from = XINT (XCAR (val)); |
8f924df7 | 8898 | if (from > 255) |
8dcbea82 KH |
8899 | args_out_of_range_3 (XCAR (val), |
8900 | make_number (0), make_number (255)); | |
df7492f9 | 8901 | to = XINT (XCDR (val)); |
8dcbea82 KH |
8902 | if (to < from || to > 255) |
8903 | args_out_of_range_3 (XCDR (val), | |
8904 | XCAR (val), make_number (255)); | |
df7492f9 | 8905 | } |
8dcbea82 | 8906 | for (i = from; i <= to; i++) |
8f924df7 | 8907 | SSET (valids, i, 1); |
df7492f9 KH |
8908 | } |
8909 | ASET (attrs, coding_attr_ccl_valids, valids); | |
4ed46869 | 8910 | |
df7492f9 | 8911 | category = coding_category_ccl; |
55ab7be3 | 8912 | } |
df7492f9 | 8913 | else if (EQ (coding_type, Qutf_16)) |
55ab7be3 | 8914 | { |
df7492f9 | 8915 | Lisp_Object bom, endian; |
4ed46869 | 8916 | |
584948ac | 8917 | CODING_ATTR_ASCII_COMPAT (attrs) = Qnil; |
4ed46869 | 8918 | |
df7492f9 KH |
8919 | if (nargs < coding_arg_utf16_max) |
8920 | goto short_args; | |
4ed46869 | 8921 | |
df7492f9 KH |
8922 | bom = args[coding_arg_utf16_bom]; |
8923 | if (! NILP (bom) && ! EQ (bom, Qt)) | |
8924 | { | |
8925 | CHECK_CONS (bom); | |
8f924df7 KH |
8926 | val = XCAR (bom); |
8927 | CHECK_CODING_SYSTEM (val); | |
8928 | val = XCDR (bom); | |
8929 | CHECK_CODING_SYSTEM (val); | |
df7492f9 KH |
8930 | } |
8931 | ASET (attrs, coding_attr_utf_16_bom, bom); | |
8932 | ||
8933 | endian = args[coding_arg_utf16_endian]; | |
b49a1807 KH |
8934 | CHECK_SYMBOL (endian); |
8935 | if (NILP (endian)) | |
8936 | endian = Qbig; | |
8937 | else if (! EQ (endian, Qbig) && ! EQ (endian, Qlittle)) | |
8f924df7 | 8938 | error ("Invalid endian: %s", SDATA (SYMBOL_NAME (endian))); |
df7492f9 KH |
8939 | ASET (attrs, coding_attr_utf_16_endian, endian); |
8940 | ||
8941 | category = (CONSP (bom) | |
8942 | ? coding_category_utf_16_auto | |
8943 | : NILP (bom) | |
b49a1807 | 8944 | ? (EQ (endian, Qbig) |
df7492f9 KH |
8945 | ? coding_category_utf_16_be_nosig |
8946 | : coding_category_utf_16_le_nosig) | |
b49a1807 | 8947 | : (EQ (endian, Qbig) |
df7492f9 KH |
8948 | ? coding_category_utf_16_be |
8949 | : coding_category_utf_16_le)); | |
8950 | } | |
8951 | else if (EQ (coding_type, Qiso_2022)) | |
8952 | { | |
8953 | Lisp_Object initial, reg_usage, request, flags; | |
4776e638 | 8954 | int i; |
1397dc18 | 8955 | |
df7492f9 KH |
8956 | if (nargs < coding_arg_iso2022_max) |
8957 | goto short_args; | |
8958 | ||
8959 | initial = Fcopy_sequence (args[coding_arg_iso2022_initial]); | |
8960 | CHECK_VECTOR (initial); | |
8961 | for (i = 0; i < 4; i++) | |
8962 | { | |
8963 | val = Faref (initial, make_number (i)); | |
8964 | if (! NILP (val)) | |
8965 | { | |
584948ac KH |
8966 | struct charset *charset; |
8967 | ||
8968 | CHECK_CHARSET_GET_CHARSET (val, charset); | |
8969 | ASET (initial, i, make_number (CHARSET_ID (charset))); | |
8970 | if (i == 0 && CHARSET_ASCII_COMPATIBLE_P (charset)) | |
8971 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
df7492f9 KH |
8972 | } |
8973 | else | |
8974 | ASET (initial, i, make_number (-1)); | |
8975 | } | |
8976 | ||
8977 | reg_usage = args[coding_arg_iso2022_reg_usage]; | |
8978 | CHECK_CONS (reg_usage); | |
8f924df7 KH |
8979 | CHECK_NUMBER_CAR (reg_usage); |
8980 | CHECK_NUMBER_CDR (reg_usage); | |
df7492f9 KH |
8981 | |
8982 | request = Fcopy_sequence (args[coding_arg_iso2022_request]); | |
8983 | for (tail = request; ! NILP (tail); tail = Fcdr (tail)) | |
1397dc18 | 8984 | { |
df7492f9 | 8985 | int id; |
8f924df7 | 8986 | Lisp_Object tmp; |
df7492f9 KH |
8987 | |
8988 | val = Fcar (tail); | |
8989 | CHECK_CONS (val); | |
8f924df7 KH |
8990 | tmp = XCAR (val); |
8991 | CHECK_CHARSET_GET_ID (tmp, id); | |
8992 | CHECK_NATNUM_CDR (val); | |
df7492f9 KH |
8993 | if (XINT (XCDR (val)) >= 4) |
8994 | error ("Invalid graphic register number: %d", XINT (XCDR (val))); | |
8f924df7 | 8995 | XSETCAR (val, make_number (id)); |
1397dc18 | 8996 | } |
4ed46869 | 8997 | |
df7492f9 KH |
8998 | flags = args[coding_arg_iso2022_flags]; |
8999 | CHECK_NATNUM (flags); | |
9000 | i = XINT (flags); | |
9001 | if (EQ (args[coding_arg_charset_list], Qiso_2022)) | |
9002 | flags = make_number (i | CODING_ISO_FLAG_FULL_SUPPORT); | |
9003 | ||
9004 | ASET (attrs, coding_attr_iso_initial, initial); | |
9005 | ASET (attrs, coding_attr_iso_usage, reg_usage); | |
9006 | ASET (attrs, coding_attr_iso_request, request); | |
9007 | ASET (attrs, coding_attr_iso_flags, flags); | |
9008 | setup_iso_safe_charsets (attrs); | |
9009 | ||
9010 | if (i & CODING_ISO_FLAG_SEVEN_BITS) | |
9011 | category = ((i & (CODING_ISO_FLAG_LOCKING_SHIFT | |
9012 | | CODING_ISO_FLAG_SINGLE_SHIFT)) | |
9013 | ? coding_category_iso_7_else | |
9014 | : EQ (args[coding_arg_charset_list], Qiso_2022) | |
9015 | ? coding_category_iso_7 | |
9016 | : coding_category_iso_7_tight); | |
9017 | else | |
9018 | { | |
9019 | int id = XINT (AREF (initial, 1)); | |
9020 | ||
c6fb6e98 | 9021 | category = (((i & CODING_ISO_FLAG_LOCKING_SHIFT) |
df7492f9 KH |
9022 | || EQ (args[coding_arg_charset_list], Qiso_2022) |
9023 | || id < 0) | |
9024 | ? coding_category_iso_8_else | |
9025 | : (CHARSET_DIMENSION (CHARSET_FROM_ID (id)) == 1) | |
9026 | ? coding_category_iso_8_1 | |
9027 | : coding_category_iso_8_2); | |
9028 | } | |
0ce7886f KH |
9029 | if (category != coding_category_iso_8_1 |
9030 | && category != coding_category_iso_8_2) | |
9031 | CODING_ATTR_ASCII_COMPAT (attrs) = Qnil; | |
df7492f9 KH |
9032 | } |
9033 | else if (EQ (coding_type, Qemacs_mule)) | |
c28a9453 | 9034 | { |
df7492f9 KH |
9035 | if (EQ (args[coding_arg_charset_list], Qemacs_mule)) |
9036 | ASET (attrs, coding_attr_emacs_mule_full, Qt); | |
584948ac | 9037 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; |
df7492f9 | 9038 | category = coding_category_emacs_mule; |
c28a9453 | 9039 | } |
df7492f9 | 9040 | else if (EQ (coding_type, Qshift_jis)) |
c28a9453 | 9041 | { |
df7492f9 KH |
9042 | |
9043 | struct charset *charset; | |
9044 | ||
7d64c6ad | 9045 | if (XINT (Flength (charset_list)) != 3 |
6e07c25f | 9046 | && XINT (Flength (charset_list)) != 4) |
7d64c6ad | 9047 | error ("There should be three or four charsets"); |
df7492f9 KH |
9048 | |
9049 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
9050 | if (CHARSET_DIMENSION (charset) != 1) | |
9051 | error ("Dimension of charset %s is not one", | |
8f924df7 | 9052 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
584948ac KH |
9053 | if (CHARSET_ASCII_COMPATIBLE_P (charset)) |
9054 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
df7492f9 KH |
9055 | |
9056 | charset_list = XCDR (charset_list); | |
9057 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
9058 | if (CHARSET_DIMENSION (charset) != 1) | |
9059 | error ("Dimension of charset %s is not one", | |
8f924df7 | 9060 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
df7492f9 KH |
9061 | |
9062 | charset_list = XCDR (charset_list); | |
9063 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
9064 | if (CHARSET_DIMENSION (charset) != 2) | |
7d64c6ad KH |
9065 | error ("Dimension of charset %s is not two", |
9066 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); | |
9067 | ||
9068 | charset_list = XCDR (charset_list); | |
2b917a06 KH |
9069 | if (! NILP (charset_list)) |
9070 | { | |
9071 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
9072 | if (CHARSET_DIMENSION (charset) != 2) | |
9073 | error ("Dimension of charset %s is not two", | |
9074 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); | |
9075 | } | |
df7492f9 KH |
9076 | |
9077 | category = coding_category_sjis; | |
9078 | Vsjis_coding_system = name; | |
c28a9453 | 9079 | } |
df7492f9 KH |
9080 | else if (EQ (coding_type, Qbig5)) |
9081 | { | |
9082 | struct charset *charset; | |
4ed46869 | 9083 | |
df7492f9 KH |
9084 | if (XINT (Flength (charset_list)) != 2) |
9085 | error ("There should be just two charsets"); | |
9086 | ||
9087 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
9088 | if (CHARSET_DIMENSION (charset) != 1) | |
9089 | error ("Dimension of charset %s is not one", | |
8f924df7 | 9090 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
584948ac KH |
9091 | if (CHARSET_ASCII_COMPATIBLE_P (charset)) |
9092 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
df7492f9 KH |
9093 | |
9094 | charset_list = XCDR (charset_list); | |
9095 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
9096 | if (CHARSET_DIMENSION (charset) != 2) | |
9097 | error ("Dimension of charset %s is not two", | |
8f924df7 | 9098 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
4ed46869 | 9099 | |
df7492f9 KH |
9100 | category = coding_category_big5; |
9101 | Vbig5_coding_system = name; | |
9102 | } | |
9103 | else if (EQ (coding_type, Qraw_text)) | |
c28a9453 | 9104 | { |
584948ac KH |
9105 | category = coding_category_raw_text; |
9106 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
c28a9453 | 9107 | } |
df7492f9 | 9108 | else if (EQ (coding_type, Qutf_8)) |
4ed46869 | 9109 | { |
584948ac KH |
9110 | category = coding_category_utf_8; |
9111 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
4ed46869 | 9112 | } |
df7492f9 KH |
9113 | else if (EQ (coding_type, Qundecided)) |
9114 | category = coding_category_undecided; | |
4ed46869 | 9115 | else |
df7492f9 | 9116 | error ("Invalid coding system type: %s", |
8f924df7 | 9117 | SDATA (SYMBOL_NAME (coding_type))); |
4ed46869 | 9118 | |
df7492f9 | 9119 | CODING_ATTR_CATEGORY (attrs) = make_number (category); |
01378f49 KH |
9120 | CODING_ATTR_PLIST (attrs) |
9121 | = Fcons (QCcategory, Fcons (AREF (Vcoding_category_table, category), | |
9122 | CODING_ATTR_PLIST (attrs))); | |
35befdaa KH |
9123 | CODING_ATTR_PLIST (attrs) |
9124 | = Fcons (QCascii_compatible_p, | |
9125 | Fcons (CODING_ATTR_ASCII_COMPAT (attrs), | |
9126 | CODING_ATTR_PLIST (attrs))); | |
c4825358 | 9127 | |
df7492f9 KH |
9128 | eol_type = args[coding_arg_eol_type]; |
9129 | if (! NILP (eol_type) | |
9130 | && ! EQ (eol_type, Qunix) | |
9131 | && ! EQ (eol_type, Qdos) | |
9132 | && ! EQ (eol_type, Qmac)) | |
9133 | error ("Invalid eol-type"); | |
4ed46869 | 9134 | |
df7492f9 | 9135 | aliases = Fcons (name, Qnil); |
4ed46869 | 9136 | |
df7492f9 KH |
9137 | if (NILP (eol_type)) |
9138 | { | |
9139 | eol_type = make_subsidiaries (name); | |
9140 | for (i = 0; i < 3; i++) | |
1397dc18 | 9141 | { |
df7492f9 KH |
9142 | Lisp_Object this_spec, this_name, this_aliases, this_eol_type; |
9143 | ||
9144 | this_name = AREF (eol_type, i); | |
9145 | this_aliases = Fcons (this_name, Qnil); | |
9146 | this_eol_type = (i == 0 ? Qunix : i == 1 ? Qdos : Qmac); | |
9147 | this_spec = Fmake_vector (make_number (3), attrs); | |
9148 | ASET (this_spec, 1, this_aliases); | |
9149 | ASET (this_spec, 2, this_eol_type); | |
9150 | Fputhash (this_name, this_spec, Vcoding_system_hash_table); | |
9151 | Vcoding_system_list = Fcons (this_name, Vcoding_system_list); | |
583f71ca KH |
9152 | val = Fassoc (Fsymbol_name (this_name), Vcoding_system_alist); |
9153 | if (NILP (val)) | |
9154 | Vcoding_system_alist | |
9155 | = Fcons (Fcons (Fsymbol_name (this_name), Qnil), | |
9156 | Vcoding_system_alist); | |
1397dc18 | 9157 | } |
d46c5b12 | 9158 | } |
4ed46869 | 9159 | |
df7492f9 KH |
9160 | spec_vec = Fmake_vector (make_number (3), attrs); |
9161 | ASET (spec_vec, 1, aliases); | |
9162 | ASET (spec_vec, 2, eol_type); | |
48b0f3ae | 9163 | |
df7492f9 KH |
9164 | Fputhash (name, spec_vec, Vcoding_system_hash_table); |
9165 | Vcoding_system_list = Fcons (name, Vcoding_system_list); | |
583f71ca KH |
9166 | val = Fassoc (Fsymbol_name (name), Vcoding_system_alist); |
9167 | if (NILP (val)) | |
9168 | Vcoding_system_alist = Fcons (Fcons (Fsymbol_name (name), Qnil), | |
9169 | Vcoding_system_alist); | |
48b0f3ae | 9170 | |
df7492f9 KH |
9171 | { |
9172 | int id = coding_categories[category].id; | |
48b0f3ae | 9173 | |
df7492f9 KH |
9174 | if (id < 0 || EQ (name, CODING_ID_NAME (id))) |
9175 | setup_coding_system (name, &coding_categories[category]); | |
9176 | } | |
48b0f3ae | 9177 | |
d46c5b12 | 9178 | return Qnil; |
48b0f3ae | 9179 | |
df7492f9 KH |
9180 | short_args: |
9181 | return Fsignal (Qwrong_number_of_arguments, | |
9182 | Fcons (intern ("define-coding-system-internal"), | |
9183 | make_number (nargs))); | |
d46c5b12 | 9184 | } |
4ed46869 | 9185 | |
d6925f38 | 9186 | |
a6f87d34 KH |
9187 | DEFUN ("coding-system-put", Fcoding_system_put, Scoding_system_put, |
9188 | 3, 3, 0, | |
9189 | doc: /* Change value in CODING-SYSTEM's property list PROP to VAL. */) | |
9190 | (coding_system, prop, val) | |
9191 | Lisp_Object coding_system, prop, val; | |
9192 | { | |
3dbe7859 | 9193 | Lisp_Object spec, attrs; |
a6f87d34 KH |
9194 | |
9195 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
9196 | attrs = AREF (spec, 0); | |
9197 | if (EQ (prop, QCmnemonic)) | |
9198 | { | |
9199 | if (! STRINGP (val)) | |
9200 | CHECK_CHARACTER (val); | |
9201 | CODING_ATTR_MNEMONIC (attrs) = val; | |
9202 | } | |
9203 | else if (EQ (prop, QCdefalut_char)) | |
9204 | { | |
9205 | if (NILP (val)) | |
9206 | val = make_number (' '); | |
9207 | else | |
9208 | CHECK_CHARACTER (val); | |
9209 | CODING_ATTR_DEFAULT_CHAR (attrs) = val; | |
9210 | } | |
9211 | else if (EQ (prop, QCdecode_translation_table)) | |
9212 | { | |
9213 | if (! CHAR_TABLE_P (val) && ! CONSP (val)) | |
9214 | CHECK_SYMBOL (val); | |
9215 | CODING_ATTR_DECODE_TBL (attrs) = val; | |
9216 | } | |
9217 | else if (EQ (prop, QCencode_translation_table)) | |
9218 | { | |
9219 | if (! CHAR_TABLE_P (val) && ! CONSP (val)) | |
9220 | CHECK_SYMBOL (val); | |
9221 | CODING_ATTR_ENCODE_TBL (attrs) = val; | |
9222 | } | |
9223 | else if (EQ (prop, QCpost_read_conversion)) | |
9224 | { | |
9225 | CHECK_SYMBOL (val); | |
9226 | CODING_ATTR_POST_READ (attrs) = val; | |
9227 | } | |
9228 | else if (EQ (prop, QCpre_write_conversion)) | |
9229 | { | |
9230 | CHECK_SYMBOL (val); | |
9231 | CODING_ATTR_PRE_WRITE (attrs) = val; | |
9232 | } | |
35befdaa KH |
9233 | else if (EQ (prop, QCascii_compatible_p)) |
9234 | { | |
9235 | CODING_ATTR_ASCII_COMPAT (attrs) = val; | |
9236 | } | |
a6f87d34 KH |
9237 | |
9238 | CODING_ATTR_PLIST (attrs) | |
9239 | = Fplist_put (CODING_ATTR_PLIST (attrs), prop, val); | |
9240 | return val; | |
9241 | } | |
9242 | ||
9243 | ||
df7492f9 KH |
9244 | DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, |
9245 | Sdefine_coding_system_alias, 2, 2, 0, | |
9246 | doc: /* Define ALIAS as an alias for CODING-SYSTEM. */) | |
9247 | (alias, coding_system) | |
9248 | Lisp_Object alias, coding_system; | |
66cfb530 | 9249 | { |
583f71ca | 9250 | Lisp_Object spec, aliases, eol_type, val; |
4ed46869 | 9251 | |
df7492f9 KH |
9252 | CHECK_SYMBOL (alias); |
9253 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
9254 | aliases = AREF (spec, 1); | |
d6925f38 KH |
9255 | /* ALISES should be a list of length more than zero, and the first |
9256 | element is a base coding system. Append ALIAS at the tail of the | |
9257 | list. */ | |
df7492f9 KH |
9258 | while (!NILP (XCDR (aliases))) |
9259 | aliases = XCDR (aliases); | |
8f924df7 | 9260 | XSETCDR (aliases, Fcons (alias, Qnil)); |
4ed46869 | 9261 | |
df7492f9 KH |
9262 | eol_type = AREF (spec, 2); |
9263 | if (VECTORP (eol_type)) | |
4ed46869 | 9264 | { |
df7492f9 KH |
9265 | Lisp_Object subsidiaries; |
9266 | int i; | |
4ed46869 | 9267 | |
df7492f9 KH |
9268 | subsidiaries = make_subsidiaries (alias); |
9269 | for (i = 0; i < 3; i++) | |
9270 | Fdefine_coding_system_alias (AREF (subsidiaries, i), | |
9271 | AREF (eol_type, i)); | |
4ed46869 | 9272 | } |
df7492f9 KH |
9273 | |
9274 | Fputhash (alias, spec, Vcoding_system_hash_table); | |
d6925f38 | 9275 | Vcoding_system_list = Fcons (alias, Vcoding_system_list); |
583f71ca KH |
9276 | val = Fassoc (Fsymbol_name (alias), Vcoding_system_alist); |
9277 | if (NILP (val)) | |
9278 | Vcoding_system_alist = Fcons (Fcons (Fsymbol_name (alias), Qnil), | |
9279 | Vcoding_system_alist); | |
66cfb530 | 9280 | |
4ed46869 KH |
9281 | return Qnil; |
9282 | } | |
9283 | ||
df7492f9 KH |
9284 | DEFUN ("coding-system-base", Fcoding_system_base, Scoding_system_base, |
9285 | 1, 1, 0, | |
9286 | doc: /* Return the base of CODING-SYSTEM. | |
da7db224 | 9287 | Any alias or subsidiary coding system is not a base coding system. */) |
df7492f9 KH |
9288 | (coding_system) |
9289 | Lisp_Object coding_system; | |
d46c5b12 | 9290 | { |
df7492f9 | 9291 | Lisp_Object spec, attrs; |
d46c5b12 | 9292 | |
df7492f9 KH |
9293 | if (NILP (coding_system)) |
9294 | return (Qno_conversion); | |
9295 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
9296 | attrs = AREF (spec, 0); | |
9297 | return CODING_ATTR_BASE_NAME (attrs); | |
9298 | } | |
1397dc18 | 9299 | |
df7492f9 KH |
9300 | DEFUN ("coding-system-plist", Fcoding_system_plist, Scoding_system_plist, |
9301 | 1, 1, 0, | |
9302 | doc: "Return the property list of CODING-SYSTEM.") | |
9303 | (coding_system) | |
9304 | Lisp_Object coding_system; | |
9305 | { | |
9306 | Lisp_Object spec, attrs; | |
1397dc18 | 9307 | |
df7492f9 KH |
9308 | if (NILP (coding_system)) |
9309 | coding_system = Qno_conversion; | |
9310 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
9311 | attrs = AREF (spec, 0); | |
9312 | return CODING_ATTR_PLIST (attrs); | |
d46c5b12 KH |
9313 | } |
9314 | ||
df7492f9 KH |
9315 | |
9316 | DEFUN ("coding-system-aliases", Fcoding_system_aliases, Scoding_system_aliases, | |
9317 | 1, 1, 0, | |
da7db224 | 9318 | doc: /* Return the list of aliases of CODING-SYSTEM. */) |
df7492f9 KH |
9319 | (coding_system) |
9320 | Lisp_Object coding_system; | |
66cfb530 | 9321 | { |
df7492f9 | 9322 | Lisp_Object spec; |
84d60297 | 9323 | |
df7492f9 KH |
9324 | if (NILP (coding_system)) |
9325 | coding_system = Qno_conversion; | |
9326 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
da7db224 | 9327 | return AREF (spec, 1); |
df7492f9 | 9328 | } |
66cfb530 | 9329 | |
df7492f9 KH |
9330 | DEFUN ("coding-system-eol-type", Fcoding_system_eol_type, |
9331 | Scoding_system_eol_type, 1, 1, 0, | |
9332 | doc: /* Return eol-type of CODING-SYSTEM. | |
9333 | An eol-type is integer 0, 1, 2, or a vector of coding systems. | |
66cfb530 | 9334 | |
df7492f9 KH |
9335 | Integer values 0, 1, and 2 indicate a format of end-of-line; LF, CRLF, |
9336 | and CR respectively. | |
66cfb530 | 9337 | |
df7492f9 KH |
9338 | A vector value indicates that a format of end-of-line should be |
9339 | detected automatically. Nth element of the vector is the subsidiary | |
9340 | coding system whose eol-type is N. */) | |
6b89e3aa KH |
9341 | (coding_system) |
9342 | Lisp_Object coding_system; | |
9343 | { | |
df7492f9 KH |
9344 | Lisp_Object spec, eol_type; |
9345 | int n; | |
6b89e3aa | 9346 | |
df7492f9 KH |
9347 | if (NILP (coding_system)) |
9348 | coding_system = Qno_conversion; | |
9349 | if (! CODING_SYSTEM_P (coding_system)) | |
9350 | return Qnil; | |
9351 | spec = CODING_SYSTEM_SPEC (coding_system); | |
9352 | eol_type = AREF (spec, 2); | |
9353 | if (VECTORP (eol_type)) | |
9354 | return Fcopy_sequence (eol_type); | |
9355 | n = EQ (eol_type, Qunix) ? 0 : EQ (eol_type, Qdos) ? 1 : 2; | |
9356 | return make_number (n); | |
6b89e3aa KH |
9357 | } |
9358 | ||
4ed46869 KH |
9359 | #endif /* emacs */ |
9360 | ||
9361 | \f | |
1397dc18 | 9362 | /*** 9. Post-amble ***/ |
4ed46869 | 9363 | |
dfcf069d | 9364 | void |
4ed46869 KH |
9365 | init_coding_once () |
9366 | { | |
9367 | int i; | |
9368 | ||
df7492f9 KH |
9369 | for (i = 0; i < coding_category_max; i++) |
9370 | { | |
9371 | coding_categories[i].id = -1; | |
9372 | coding_priorities[i] = i; | |
9373 | } | |
4ed46869 KH |
9374 | |
9375 | /* ISO2022 specific initialize routine. */ | |
9376 | for (i = 0; i < 0x20; i++) | |
b73bfc1c | 9377 | iso_code_class[i] = ISO_control_0; |
4ed46869 KH |
9378 | for (i = 0x21; i < 0x7F; i++) |
9379 | iso_code_class[i] = ISO_graphic_plane_0; | |
9380 | for (i = 0x80; i < 0xA0; i++) | |
b73bfc1c | 9381 | iso_code_class[i] = ISO_control_1; |
4ed46869 KH |
9382 | for (i = 0xA1; i < 0xFF; i++) |
9383 | iso_code_class[i] = ISO_graphic_plane_1; | |
9384 | iso_code_class[0x20] = iso_code_class[0x7F] = ISO_0x20_or_0x7F; | |
9385 | iso_code_class[0xA0] = iso_code_class[0xFF] = ISO_0xA0_or_0xFF; | |
4ed46869 KH |
9386 | iso_code_class[ISO_CODE_SO] = ISO_shift_out; |
9387 | iso_code_class[ISO_CODE_SI] = ISO_shift_in; | |
9388 | iso_code_class[ISO_CODE_SS2_7] = ISO_single_shift_2_7; | |
9389 | iso_code_class[ISO_CODE_ESC] = ISO_escape; | |
9390 | iso_code_class[ISO_CODE_SS2] = ISO_single_shift_2; | |
9391 | iso_code_class[ISO_CODE_SS3] = ISO_single_shift_3; | |
9392 | iso_code_class[ISO_CODE_CSI] = ISO_control_sequence_introducer; | |
9393 | ||
df7492f9 KH |
9394 | for (i = 0; i < 256; i++) |
9395 | { | |
9396 | emacs_mule_bytes[i] = 1; | |
9397 | } | |
7c78e542 KH |
9398 | emacs_mule_bytes[EMACS_MULE_LEADING_CODE_PRIVATE_11] = 3; |
9399 | emacs_mule_bytes[EMACS_MULE_LEADING_CODE_PRIVATE_12] = 3; | |
9400 | emacs_mule_bytes[EMACS_MULE_LEADING_CODE_PRIVATE_21] = 4; | |
9401 | emacs_mule_bytes[EMACS_MULE_LEADING_CODE_PRIVATE_22] = 4; | |
e0e989f6 KH |
9402 | } |
9403 | ||
9404 | #ifdef emacs | |
9405 | ||
dfcf069d | 9406 | void |
e0e989f6 KH |
9407 | syms_of_coding () |
9408 | { | |
df7492f9 | 9409 | staticpro (&Vcoding_system_hash_table); |
8f924df7 KH |
9410 | { |
9411 | Lisp_Object args[2]; | |
9412 | args[0] = QCtest; | |
9413 | args[1] = Qeq; | |
9414 | Vcoding_system_hash_table = Fmake_hash_table (2, args); | |
9415 | } | |
df7492f9 KH |
9416 | |
9417 | staticpro (&Vsjis_coding_system); | |
9418 | Vsjis_coding_system = Qnil; | |
e0e989f6 | 9419 | |
df7492f9 KH |
9420 | staticpro (&Vbig5_coding_system); |
9421 | Vbig5_coding_system = Qnil; | |
9422 | ||
24a73b0a KH |
9423 | staticpro (&Vcode_conversion_reused_workbuf); |
9424 | Vcode_conversion_reused_workbuf = Qnil; | |
9425 | ||
9426 | staticpro (&Vcode_conversion_workbuf_name); | |
9427 | Vcode_conversion_workbuf_name = build_string (" *code-conversion-work*"); | |
e0e989f6 | 9428 | |
24a73b0a | 9429 | reused_workbuf_in_use = 0; |
df7492f9 KH |
9430 | |
9431 | DEFSYM (Qcharset, "charset"); | |
9432 | DEFSYM (Qtarget_idx, "target-idx"); | |
9433 | DEFSYM (Qcoding_system_history, "coding-system-history"); | |
bb0115a2 RS |
9434 | Fset (Qcoding_system_history, Qnil); |
9435 | ||
9ce27fde | 9436 | /* Target FILENAME is the first argument. */ |
e0e989f6 | 9437 | Fput (Qinsert_file_contents, Qtarget_idx, make_number (0)); |
9ce27fde | 9438 | /* Target FILENAME is the third argument. */ |
e0e989f6 KH |
9439 | Fput (Qwrite_region, Qtarget_idx, make_number (2)); |
9440 | ||
df7492f9 | 9441 | DEFSYM (Qcall_process, "call-process"); |
9ce27fde | 9442 | /* Target PROGRAM is the first argument. */ |
e0e989f6 KH |
9443 | Fput (Qcall_process, Qtarget_idx, make_number (0)); |
9444 | ||
df7492f9 | 9445 | DEFSYM (Qcall_process_region, "call-process-region"); |
9ce27fde | 9446 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
9447 | Fput (Qcall_process_region, Qtarget_idx, make_number (2)); |
9448 | ||
df7492f9 | 9449 | DEFSYM (Qstart_process, "start-process"); |
9ce27fde | 9450 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
9451 | Fput (Qstart_process, Qtarget_idx, make_number (2)); |
9452 | ||
df7492f9 | 9453 | DEFSYM (Qopen_network_stream, "open-network-stream"); |
9ce27fde | 9454 | /* Target SERVICE is the fourth argument. */ |
e0e989f6 KH |
9455 | Fput (Qopen_network_stream, Qtarget_idx, make_number (3)); |
9456 | ||
df7492f9 KH |
9457 | DEFSYM (Qcoding_system, "coding-system"); |
9458 | DEFSYM (Qcoding_aliases, "coding-aliases"); | |
4ed46869 | 9459 | |
df7492f9 KH |
9460 | DEFSYM (Qeol_type, "eol-type"); |
9461 | DEFSYM (Qunix, "unix"); | |
9462 | DEFSYM (Qdos, "dos"); | |
4ed46869 | 9463 | |
df7492f9 KH |
9464 | DEFSYM (Qbuffer_file_coding_system, "buffer-file-coding-system"); |
9465 | DEFSYM (Qpost_read_conversion, "post-read-conversion"); | |
9466 | DEFSYM (Qpre_write_conversion, "pre-write-conversion"); | |
9467 | DEFSYM (Qdefault_char, "default-char"); | |
9468 | DEFSYM (Qundecided, "undecided"); | |
9469 | DEFSYM (Qno_conversion, "no-conversion"); | |
9470 | DEFSYM (Qraw_text, "raw-text"); | |
4ed46869 | 9471 | |
df7492f9 | 9472 | DEFSYM (Qiso_2022, "iso-2022"); |
4ed46869 | 9473 | |
df7492f9 | 9474 | DEFSYM (Qutf_8, "utf-8"); |
8f924df7 | 9475 | DEFSYM (Qutf_8_emacs, "utf-8-emacs"); |
27901516 | 9476 | |
df7492f9 | 9477 | DEFSYM (Qutf_16, "utf-16"); |
df7492f9 KH |
9478 | DEFSYM (Qbig, "big"); |
9479 | DEFSYM (Qlittle, "little"); | |
27901516 | 9480 | |
df7492f9 KH |
9481 | DEFSYM (Qshift_jis, "shift-jis"); |
9482 | DEFSYM (Qbig5, "big5"); | |
4ed46869 | 9483 | |
df7492f9 | 9484 | DEFSYM (Qcoding_system_p, "coding-system-p"); |
4ed46869 | 9485 | |
df7492f9 | 9486 | DEFSYM (Qcoding_system_error, "coding-system-error"); |
4ed46869 KH |
9487 | Fput (Qcoding_system_error, Qerror_conditions, |
9488 | Fcons (Qcoding_system_error, Fcons (Qerror, Qnil))); | |
9489 | Fput (Qcoding_system_error, Qerror_message, | |
9ce27fde | 9490 | build_string ("Invalid coding system")); |
4ed46869 | 9491 | |
05e6f5dc KH |
9492 | /* Intern this now in case it isn't already done. |
9493 | Setting this variable twice is harmless. | |
9494 | But don't staticpro it here--that is done in alloc.c. */ | |
9495 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
70c22245 | 9496 | |
df7492f9 | 9497 | DEFSYM (Qtranslation_table, "translation-table"); |
433f7f87 | 9498 | Fput (Qtranslation_table, Qchar_table_extra_slots, make_number (2)); |
df7492f9 KH |
9499 | DEFSYM (Qtranslation_table_id, "translation-table-id"); |
9500 | DEFSYM (Qtranslation_table_for_decode, "translation-table-for-decode"); | |
9501 | DEFSYM (Qtranslation_table_for_encode, "translation-table-for-encode"); | |
1397dc18 | 9502 | |
df7492f9 | 9503 | DEFSYM (Qvalid_codes, "valid-codes"); |
9ce27fde | 9504 | |
df7492f9 | 9505 | DEFSYM (Qemacs_mule, "emacs-mule"); |
d46c5b12 | 9506 | |
01378f49 | 9507 | DEFSYM (QCcategory, ":category"); |
a6f87d34 KH |
9508 | DEFSYM (QCmnemonic, ":mnemonic"); |
9509 | DEFSYM (QCdefalut_char, ":default-char"); | |
9510 | DEFSYM (QCdecode_translation_table, ":decode-translation-table"); | |
9511 | DEFSYM (QCencode_translation_table, ":encode-translation-table"); | |
9512 | DEFSYM (QCpost_read_conversion, ":post-read-conversion"); | |
9513 | DEFSYM (QCpre_write_conversion, ":pre-write-conversion"); | |
35befdaa | 9514 | DEFSYM (QCascii_compatible_p, ":ascii-compatible-p"); |
01378f49 | 9515 | |
df7492f9 KH |
9516 | Vcoding_category_table |
9517 | = Fmake_vector (make_number (coding_category_max), Qnil); | |
9518 | staticpro (&Vcoding_category_table); | |
9519 | /* Followings are target of code detection. */ | |
9520 | ASET (Vcoding_category_table, coding_category_iso_7, | |
9521 | intern ("coding-category-iso-7")); | |
9522 | ASET (Vcoding_category_table, coding_category_iso_7_tight, | |
9523 | intern ("coding-category-iso-7-tight")); | |
9524 | ASET (Vcoding_category_table, coding_category_iso_8_1, | |
9525 | intern ("coding-category-iso-8-1")); | |
9526 | ASET (Vcoding_category_table, coding_category_iso_8_2, | |
9527 | intern ("coding-category-iso-8-2")); | |
9528 | ASET (Vcoding_category_table, coding_category_iso_7_else, | |
9529 | intern ("coding-category-iso-7-else")); | |
9530 | ASET (Vcoding_category_table, coding_category_iso_8_else, | |
9531 | intern ("coding-category-iso-8-else")); | |
9532 | ASET (Vcoding_category_table, coding_category_utf_8, | |
9533 | intern ("coding-category-utf-8")); | |
9534 | ASET (Vcoding_category_table, coding_category_utf_16_be, | |
9535 | intern ("coding-category-utf-16-be")); | |
ff563fce KH |
9536 | ASET (Vcoding_category_table, coding_category_utf_16_auto, |
9537 | intern ("coding-category-utf-16-auto")); | |
df7492f9 KH |
9538 | ASET (Vcoding_category_table, coding_category_utf_16_le, |
9539 | intern ("coding-category-utf-16-le")); | |
9540 | ASET (Vcoding_category_table, coding_category_utf_16_be_nosig, | |
9541 | intern ("coding-category-utf-16-be-nosig")); | |
9542 | ASET (Vcoding_category_table, coding_category_utf_16_le_nosig, | |
9543 | intern ("coding-category-utf-16-le-nosig")); | |
9544 | ASET (Vcoding_category_table, coding_category_charset, | |
9545 | intern ("coding-category-charset")); | |
9546 | ASET (Vcoding_category_table, coding_category_sjis, | |
9547 | intern ("coding-category-sjis")); | |
9548 | ASET (Vcoding_category_table, coding_category_big5, | |
9549 | intern ("coding-category-big5")); | |
9550 | ASET (Vcoding_category_table, coding_category_ccl, | |
9551 | intern ("coding-category-ccl")); | |
9552 | ASET (Vcoding_category_table, coding_category_emacs_mule, | |
9553 | intern ("coding-category-emacs-mule")); | |
9554 | /* Followings are NOT target of code detection. */ | |
9555 | ASET (Vcoding_category_table, coding_category_raw_text, | |
9556 | intern ("coding-category-raw-text")); | |
9557 | ASET (Vcoding_category_table, coding_category_undecided, | |
9558 | intern ("coding-category-undecided")); | |
ecf488bc | 9559 | |
065e3595 KH |
9560 | DEFSYM (Qinsufficient_source, "insufficient-source"); |
9561 | DEFSYM (Qinconsistent_eol, "inconsistent-eol"); | |
9562 | DEFSYM (Qinvalid_source, "invalid-source"); | |
9563 | DEFSYM (Qinterrupted, "interrupted"); | |
9564 | DEFSYM (Qinsufficient_memory, "insufficient-memory"); | |
44e8490d | 9565 | DEFSYM (Qcoding_system_define_form, "coding-system-define-form"); |
065e3595 | 9566 | |
4ed46869 KH |
9567 | defsubr (&Scoding_system_p); |
9568 | defsubr (&Sread_coding_system); | |
9569 | defsubr (&Sread_non_nil_coding_system); | |
9570 | defsubr (&Scheck_coding_system); | |
9571 | defsubr (&Sdetect_coding_region); | |
d46c5b12 | 9572 | defsubr (&Sdetect_coding_string); |
05e6f5dc | 9573 | defsubr (&Sfind_coding_systems_region_internal); |
068a9dbd | 9574 | defsubr (&Sunencodable_char_position); |
df7492f9 | 9575 | defsubr (&Scheck_coding_systems_region); |
4ed46869 KH |
9576 | defsubr (&Sdecode_coding_region); |
9577 | defsubr (&Sencode_coding_region); | |
9578 | defsubr (&Sdecode_coding_string); | |
9579 | defsubr (&Sencode_coding_string); | |
9580 | defsubr (&Sdecode_sjis_char); | |
9581 | defsubr (&Sencode_sjis_char); | |
9582 | defsubr (&Sdecode_big5_char); | |
9583 | defsubr (&Sencode_big5_char); | |
1ba9e4ab | 9584 | defsubr (&Sset_terminal_coding_system_internal); |
c4825358 | 9585 | defsubr (&Sset_safe_terminal_coding_system_internal); |
4ed46869 | 9586 | defsubr (&Sterminal_coding_system); |
1ba9e4ab | 9587 | defsubr (&Sset_keyboard_coding_system_internal); |
4ed46869 | 9588 | defsubr (&Skeyboard_coding_system); |
a5d301df | 9589 | defsubr (&Sfind_operation_coding_system); |
df7492f9 | 9590 | defsubr (&Sset_coding_system_priority); |
6b89e3aa | 9591 | defsubr (&Sdefine_coding_system_internal); |
df7492f9 | 9592 | defsubr (&Sdefine_coding_system_alias); |
a6f87d34 | 9593 | defsubr (&Scoding_system_put); |
df7492f9 KH |
9594 | defsubr (&Scoding_system_base); |
9595 | defsubr (&Scoding_system_plist); | |
9596 | defsubr (&Scoding_system_aliases); | |
9597 | defsubr (&Scoding_system_eol_type); | |
9598 | defsubr (&Scoding_system_priority_list); | |
4ed46869 | 9599 | |
4608c386 | 9600 | DEFVAR_LISP ("coding-system-list", &Vcoding_system_list, |
48b0f3ae PJ |
9601 | doc: /* List of coding systems. |
9602 | ||
9603 | Do not alter the value of this variable manually. This variable should be | |
df7492f9 | 9604 | updated by the functions `define-coding-system' and |
48b0f3ae | 9605 | `define-coding-system-alias'. */); |
4608c386 KH |
9606 | Vcoding_system_list = Qnil; |
9607 | ||
9608 | DEFVAR_LISP ("coding-system-alist", &Vcoding_system_alist, | |
48b0f3ae PJ |
9609 | doc: /* Alist of coding system names. |
9610 | Each element is one element list of coding system name. | |
9611 | This variable is given to `completing-read' as TABLE argument. | |
9612 | ||
9613 | Do not alter the value of this variable manually. This variable should be | |
9614 | updated by the functions `make-coding-system' and | |
9615 | `define-coding-system-alias'. */); | |
4608c386 KH |
9616 | Vcoding_system_alist = Qnil; |
9617 | ||
4ed46869 | 9618 | DEFVAR_LISP ("coding-category-list", &Vcoding_category_list, |
48b0f3ae PJ |
9619 | doc: /* List of coding-categories (symbols) ordered by priority. |
9620 | ||
9621 | On detecting a coding system, Emacs tries code detection algorithms | |
9622 | associated with each coding-category one by one in this order. When | |
9623 | one algorithm agrees with a byte sequence of source text, the coding | |
0ec31faf KH |
9624 | system bound to the corresponding coding-category is selected. |
9625 | ||
42205607 | 9626 | Don't modify this variable directly, but use `set-coding-priority'. */); |
4ed46869 KH |
9627 | { |
9628 | int i; | |
9629 | ||
9630 | Vcoding_category_list = Qnil; | |
df7492f9 | 9631 | for (i = coding_category_max - 1; i >= 0; i--) |
4ed46869 | 9632 | Vcoding_category_list |
d46c5b12 KH |
9633 | = Fcons (XVECTOR (Vcoding_category_table)->contents[i], |
9634 | Vcoding_category_list); | |
4ed46869 KH |
9635 | } |
9636 | ||
9637 | DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read, | |
48b0f3ae PJ |
9638 | doc: /* Specify the coding system for read operations. |
9639 | It is useful to bind this variable with `let', but do not set it globally. | |
9640 | If the value is a coding system, it is used for decoding on read operation. | |
9641 | If not, an appropriate element is used from one of the coding system alists: | |
9642 | There are three such tables, `file-coding-system-alist', | |
9643 | `process-coding-system-alist', and `network-coding-system-alist'. */); | |
4ed46869 KH |
9644 | Vcoding_system_for_read = Qnil; |
9645 | ||
9646 | DEFVAR_LISP ("coding-system-for-write", &Vcoding_system_for_write, | |
48b0f3ae PJ |
9647 | doc: /* Specify the coding system for write operations. |
9648 | Programs bind this variable with `let', but you should not set it globally. | |
9649 | If the value is a coding system, it is used for encoding of output, | |
9650 | when writing it to a file and when sending it to a file or subprocess. | |
9651 | ||
9652 | If this does not specify a coding system, an appropriate element | |
9653 | is used from one of the coding system alists: | |
9654 | There are three such tables, `file-coding-system-alist', | |
9655 | `process-coding-system-alist', and `network-coding-system-alist'. | |
9656 | For output to files, if the above procedure does not specify a coding system, | |
9657 | the value of `buffer-file-coding-system' is used. */); | |
4ed46869 KH |
9658 | Vcoding_system_for_write = Qnil; |
9659 | ||
9660 | DEFVAR_LISP ("last-coding-system-used", &Vlast_coding_system_used, | |
df7492f9 KH |
9661 | doc: /* |
9662 | Coding system used in the latest file or process I/O. */); | |
4ed46869 KH |
9663 | Vlast_coding_system_used = Qnil; |
9664 | ||
065e3595 KH |
9665 | DEFVAR_LISP ("last-code-conversion-error", &Vlast_code_conversion_error, |
9666 | doc: /* | |
9667 | Error status of the last code conversion. | |
9668 | ||
9669 | When an error was detected in the last code conversion, this variable | |
9670 | is set to one of the following symbols. | |
9671 | `insufficient-source' | |
9672 | `inconsistent-eol' | |
9673 | `invalid-source' | |
9674 | `interrupted' | |
9675 | `insufficient-memory' | |
9676 | When no error was detected, the value doesn't change. So, to check | |
9677 | the error status of a code conversion by this variable, you must | |
9678 | explicitly set this variable to nil before performing code | |
9679 | conversion. */); | |
9680 | Vlast_code_conversion_error = Qnil; | |
9681 | ||
9ce27fde | 9682 | DEFVAR_BOOL ("inhibit-eol-conversion", &inhibit_eol_conversion, |
df7492f9 KH |
9683 | doc: /* |
9684 | *Non-nil means always inhibit code conversion of end-of-line format. | |
48b0f3ae PJ |
9685 | See info node `Coding Systems' and info node `Text and Binary' concerning |
9686 | such conversion. */); | |
9ce27fde KH |
9687 | inhibit_eol_conversion = 0; |
9688 | ||
ed29121d | 9689 | DEFVAR_BOOL ("inherit-process-coding-system", &inherit_process_coding_system, |
df7492f9 KH |
9690 | doc: /* |
9691 | Non-nil means process buffer inherits coding system of process output. | |
48b0f3ae PJ |
9692 | Bind it to t if the process output is to be treated as if it were a file |
9693 | read from some filesystem. */); | |
ed29121d EZ |
9694 | inherit_process_coding_system = 0; |
9695 | ||
02ba4723 | 9696 | DEFVAR_LISP ("file-coding-system-alist", &Vfile_coding_system_alist, |
df7492f9 KH |
9697 | doc: /* |
9698 | Alist to decide a coding system to use for a file I/O operation. | |
48b0f3ae PJ |
9699 | The format is ((PATTERN . VAL) ...), |
9700 | where PATTERN is a regular expression matching a file name, | |
9701 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
9702 | If VAL is a coding system, it is used for both decoding and encoding | |
9703 | the file contents. | |
9704 | If VAL is a cons of coding systems, the car part is used for decoding, | |
9705 | and the cdr part is used for encoding. | |
9706 | If VAL is a function symbol, the function must return a coding system | |
2c53e699 KH |
9707 | or a cons of coding systems which are used as above. The function is |
9708 | called with an argument that is a list of the arguments with which | |
5a0bbd9a KH |
9709 | `find-operation-coding-system' was called. If the function can't decide |
9710 | a coding system, it can return `undecided' so that the normal | |
9711 | code-detection is performed. | |
48b0f3ae PJ |
9712 | |
9713 | See also the function `find-operation-coding-system' | |
9714 | and the variable `auto-coding-alist'. */); | |
02ba4723 KH |
9715 | Vfile_coding_system_alist = Qnil; |
9716 | ||
9717 | DEFVAR_LISP ("process-coding-system-alist", &Vprocess_coding_system_alist, | |
df7492f9 KH |
9718 | doc: /* |
9719 | Alist to decide a coding system to use for a process I/O operation. | |
48b0f3ae PJ |
9720 | The format is ((PATTERN . VAL) ...), |
9721 | where PATTERN is a regular expression matching a program name, | |
9722 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
9723 | If VAL is a coding system, it is used for both decoding what received | |
9724 | from the program and encoding what sent to the program. | |
9725 | If VAL is a cons of coding systems, the car part is used for decoding, | |
9726 | and the cdr part is used for encoding. | |
9727 | If VAL is a function symbol, the function must return a coding system | |
9728 | or a cons of coding systems which are used as above. | |
9729 | ||
9730 | See also the function `find-operation-coding-system'. */); | |
02ba4723 KH |
9731 | Vprocess_coding_system_alist = Qnil; |
9732 | ||
9733 | DEFVAR_LISP ("network-coding-system-alist", &Vnetwork_coding_system_alist, | |
df7492f9 KH |
9734 | doc: /* |
9735 | Alist to decide a coding system to use for a network I/O operation. | |
48b0f3ae PJ |
9736 | The format is ((PATTERN . VAL) ...), |
9737 | where PATTERN is a regular expression matching a network service name | |
9738 | or is a port number to connect to, | |
9739 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
9740 | If VAL is a coding system, it is used for both decoding what received | |
9741 | from the network stream and encoding what sent to the network stream. | |
9742 | If VAL is a cons of coding systems, the car part is used for decoding, | |
9743 | and the cdr part is used for encoding. | |
9744 | If VAL is a function symbol, the function must return a coding system | |
9745 | or a cons of coding systems which are used as above. | |
9746 | ||
9747 | See also the function `find-operation-coding-system'. */); | |
02ba4723 | 9748 | Vnetwork_coding_system_alist = Qnil; |
4ed46869 | 9749 | |
68c45bf0 | 9750 | DEFVAR_LISP ("locale-coding-system", &Vlocale_coding_system, |
75205970 RS |
9751 | doc: /* Coding system to use with system messages. |
9752 | Also used for decoding keyboard input on X Window system. */); | |
68c45bf0 PE |
9753 | Vlocale_coding_system = Qnil; |
9754 | ||
005f0d35 | 9755 | /* The eol mnemonics are reset in startup.el system-dependently. */ |
7722baf9 | 9756 | DEFVAR_LISP ("eol-mnemonic-unix", &eol_mnemonic_unix, |
df7492f9 KH |
9757 | doc: /* |
9758 | *String displayed in mode line for UNIX-like (LF) end-of-line format. */); | |
7722baf9 | 9759 | eol_mnemonic_unix = build_string (":"); |
4ed46869 | 9760 | |
7722baf9 | 9761 | DEFVAR_LISP ("eol-mnemonic-dos", &eol_mnemonic_dos, |
df7492f9 KH |
9762 | doc: /* |
9763 | *String displayed in mode line for DOS-like (CRLF) end-of-line format. */); | |
7722baf9 | 9764 | eol_mnemonic_dos = build_string ("\\"); |
4ed46869 | 9765 | |
7722baf9 | 9766 | DEFVAR_LISP ("eol-mnemonic-mac", &eol_mnemonic_mac, |
df7492f9 KH |
9767 | doc: /* |
9768 | *String displayed in mode line for MAC-like (CR) end-of-line format. */); | |
7722baf9 | 9769 | eol_mnemonic_mac = build_string ("/"); |
4ed46869 | 9770 | |
7722baf9 | 9771 | DEFVAR_LISP ("eol-mnemonic-undecided", &eol_mnemonic_undecided, |
df7492f9 KH |
9772 | doc: /* |
9773 | *String displayed in mode line when end-of-line format is not yet determined. */); | |
7722baf9 | 9774 | eol_mnemonic_undecided = build_string (":"); |
4ed46869 | 9775 | |
84fbb8a0 | 9776 | DEFVAR_LISP ("enable-character-translation", &Venable_character_translation, |
df7492f9 KH |
9777 | doc: /* |
9778 | *Non-nil enables character translation while encoding and decoding. */); | |
84fbb8a0 | 9779 | Venable_character_translation = Qt; |
bdd9fb48 | 9780 | |
f967223b | 9781 | DEFVAR_LISP ("standard-translation-table-for-decode", |
48b0f3ae PJ |
9782 | &Vstandard_translation_table_for_decode, |
9783 | doc: /* Table for translating characters while decoding. */); | |
f967223b | 9784 | Vstandard_translation_table_for_decode = Qnil; |
bdd9fb48 | 9785 | |
f967223b | 9786 | DEFVAR_LISP ("standard-translation-table-for-encode", |
48b0f3ae PJ |
9787 | &Vstandard_translation_table_for_encode, |
9788 | doc: /* Table for translating characters while encoding. */); | |
f967223b | 9789 | Vstandard_translation_table_for_encode = Qnil; |
4ed46869 | 9790 | |
df7492f9 | 9791 | DEFVAR_LISP ("charset-revision-table", &Vcharset_revision_table, |
48b0f3ae PJ |
9792 | doc: /* Alist of charsets vs revision numbers. |
9793 | While encoding, if a charset (car part of an element) is found, | |
df7492f9 KH |
9794 | designate it with the escape sequence identifying revision (cdr part |
9795 | of the element). */); | |
9796 | Vcharset_revision_table = Qnil; | |
02ba4723 KH |
9797 | |
9798 | DEFVAR_LISP ("default-process-coding-system", | |
9799 | &Vdefault_process_coding_system, | |
48b0f3ae PJ |
9800 | doc: /* Cons of coding systems used for process I/O by default. |
9801 | The car part is used for decoding a process output, | |
9802 | the cdr part is used for encoding a text to be sent to a process. */); | |
02ba4723 | 9803 | Vdefault_process_coding_system = Qnil; |
c4825358 | 9804 | |
3f003981 | 9805 | DEFVAR_LISP ("latin-extra-code-table", &Vlatin_extra_code_table, |
df7492f9 KH |
9806 | doc: /* |
9807 | Table of extra Latin codes in the range 128..159 (inclusive). | |
48b0f3ae PJ |
9808 | This is a vector of length 256. |
9809 | If Nth element is non-nil, the existence of code N in a file | |
9810 | \(or output of subprocess) doesn't prevent it to be detected as | |
9811 | a coding system of ISO 2022 variant which has a flag | |
9812 | `accept-latin-extra-code' t (e.g. iso-latin-1) on reading a file | |
9813 | or reading output of a subprocess. | |
9814 | Only 128th through 159th elements has a meaning. */); | |
3f003981 | 9815 | Vlatin_extra_code_table = Fmake_vector (make_number (256), Qnil); |
d46c5b12 KH |
9816 | |
9817 | DEFVAR_LISP ("select-safe-coding-system-function", | |
9818 | &Vselect_safe_coding_system_function, | |
df7492f9 KH |
9819 | doc: /* |
9820 | Function to call to select safe coding system for encoding a text. | |
48b0f3ae PJ |
9821 | |
9822 | If set, this function is called to force a user to select a proper | |
9823 | coding system which can encode the text in the case that a default | |
fdecf907 GM |
9824 | coding system used in each operation can't encode the text. The |
9825 | function should take care that the buffer is not modified while | |
9826 | the coding system is being selected. | |
48b0f3ae PJ |
9827 | |
9828 | The default value is `select-safe-coding-system' (which see). */); | |
d46c5b12 KH |
9829 | Vselect_safe_coding_system_function = Qnil; |
9830 | ||
5d5bf4d8 KH |
9831 | DEFVAR_BOOL ("coding-system-require-warning", |
9832 | &coding_system_require_warning, | |
9833 | doc: /* Internal use only. | |
6b89e3aa KH |
9834 | If non-nil, on writing a file, `select-safe-coding-system-function' is |
9835 | called even if `coding-system-for-write' is non-nil. The command | |
9836 | `universal-coding-system-argument' binds this variable to t temporarily. */); | |
5d5bf4d8 KH |
9837 | coding_system_require_warning = 0; |
9838 | ||
9839 | ||
22ab2303 | 9840 | DEFVAR_BOOL ("inhibit-iso-escape-detection", |
74383408 | 9841 | &inhibit_iso_escape_detection, |
df7492f9 KH |
9842 | doc: /* |
9843 | If non-nil, Emacs ignores ISO2022's escape sequence on code detection. | |
48b0f3ae PJ |
9844 | |
9845 | By default, on reading a file, Emacs tries to detect how the text is | |
9846 | encoded. This code detection is sensitive to escape sequences. If | |
9847 | the sequence is valid as ISO2022, the code is determined as one of | |
9848 | the ISO2022 encodings, and the file is decoded by the corresponding | |
9849 | coding system (e.g. `iso-2022-7bit'). | |
9850 | ||
9851 | However, there may be a case that you want to read escape sequences in | |
9852 | a file as is. In such a case, you can set this variable to non-nil. | |
9853 | Then, as the code detection ignores any escape sequences, no file is | |
9854 | detected as encoded in some ISO2022 encoding. The result is that all | |
9855 | escape sequences become visible in a buffer. | |
9856 | ||
9857 | The default value is nil, and it is strongly recommended not to change | |
9858 | it. That is because many Emacs Lisp source files that contain | |
9859 | non-ASCII characters are encoded by the coding system `iso-2022-7bit' | |
9860 | in Emacs's distribution, and they won't be decoded correctly on | |
9861 | reading if you suppress escape sequence detection. | |
9862 | ||
9863 | The other way to read escape sequences in a file without decoding is | |
9864 | to explicitly specify some coding system that doesn't use ISO2022's | |
9865 | escape sequence (e.g `latin-1') on reading by \\[universal-coding-system-argument]. */); | |
74383408 | 9866 | inhibit_iso_escape_detection = 0; |
002fdb44 DL |
9867 | |
9868 | DEFVAR_LISP ("translation-table-for-input", &Vtranslation_table_for_input, | |
15c8f9d1 DL |
9869 | doc: /* Char table for translating self-inserting characters. |
9870 | This is applied to the result of input methods, not their input. See also | |
9871 | `keyboard-translate-table'. */); | |
002fdb44 | 9872 | Vtranslation_table_for_input = Qnil; |
8f924df7 | 9873 | |
2c78b7e1 KH |
9874 | { |
9875 | Lisp_Object args[coding_arg_max]; | |
8f924df7 | 9876 | Lisp_Object plist[16]; |
2c78b7e1 KH |
9877 | int i; |
9878 | ||
9879 | for (i = 0; i < coding_arg_max; i++) | |
9880 | args[i] = Qnil; | |
9881 | ||
9882 | plist[0] = intern (":name"); | |
9883 | plist[1] = args[coding_arg_name] = Qno_conversion; | |
9884 | plist[2] = intern (":mnemonic"); | |
9885 | plist[3] = args[coding_arg_mnemonic] = make_number ('='); | |
9886 | plist[4] = intern (":coding-type"); | |
9887 | plist[5] = args[coding_arg_coding_type] = Qraw_text; | |
9888 | plist[6] = intern (":ascii-compatible-p"); | |
9889 | plist[7] = args[coding_arg_ascii_compatible_p] = Qt; | |
9890 | plist[8] = intern (":default-char"); | |
9891 | plist[9] = args[coding_arg_default_char] = make_number (0); | |
8f924df7 KH |
9892 | plist[10] = intern (":for-unibyte"); |
9893 | plist[11] = args[coding_arg_for_unibyte] = Qt; | |
9894 | plist[12] = intern (":docstring"); | |
9895 | plist[13] = build_string ("Do no conversion.\n\ | |
2c78b7e1 KH |
9896 | \n\ |
9897 | When you visit a file with this coding, the file is read into a\n\ | |
9898 | unibyte buffer as is, thus each byte of a file is treated as a\n\ | |
9899 | character."); | |
8f924df7 KH |
9900 | plist[14] = intern (":eol-type"); |
9901 | plist[15] = args[coding_arg_eol_type] = Qunix; | |
9902 | args[coding_arg_plist] = Flist (16, plist); | |
2c78b7e1 | 9903 | Fdefine_coding_system_internal (coding_arg_max, args); |
ae6f73fa KH |
9904 | |
9905 | plist[1] = args[coding_arg_name] = Qundecided; | |
9906 | plist[3] = args[coding_arg_mnemonic] = make_number ('-'); | |
9907 | plist[5] = args[coding_arg_coding_type] = Qundecided; | |
9908 | /* This is already set. | |
35befdaa | 9909 | plist[7] = args[coding_arg_ascii_compatible_p] = Qt; */ |
ae6f73fa KH |
9910 | plist[8] = intern (":charset-list"); |
9911 | plist[9] = args[coding_arg_charset_list] = Fcons (Qascii, Qnil); | |
9912 | plist[11] = args[coding_arg_for_unibyte] = Qnil; | |
9913 | plist[13] = build_string ("No conversion on encoding, automatic conversion on decoding."); | |
9914 | plist[15] = args[coding_arg_eol_type] = Qnil; | |
9915 | args[coding_arg_plist] = Flist (16, plist); | |
9916 | Fdefine_coding_system_internal (coding_arg_max, args); | |
2c78b7e1 KH |
9917 | } |
9918 | ||
2c78b7e1 | 9919 | setup_coding_system (Qno_conversion, &safe_terminal_coding); |
ff563fce KH |
9920 | |
9921 | { | |
9922 | int i; | |
9923 | ||
9924 | for (i = 0; i < coding_category_max; i++) | |
9925 | Fset (AREF (Vcoding_category_table, i), Qno_conversion); | |
9926 | } | |
fcbcfb64 KH |
9927 | #if defined (MSDOS) || defined (WINDOWSNT) |
9928 | system_eol_type = Qdos; | |
9929 | #else | |
9930 | system_eol_type = Qunix; | |
9931 | #endif | |
9932 | staticpro (&system_eol_type); | |
4ed46869 KH |
9933 | } |
9934 | ||
68c45bf0 PE |
9935 | char * |
9936 | emacs_strerror (error_number) | |
9937 | int error_number; | |
9938 | { | |
9939 | char *str; | |
9940 | ||
ca9c0567 | 9941 | synchronize_system_messages_locale (); |
68c45bf0 PE |
9942 | str = strerror (error_number); |
9943 | ||
9944 | if (! NILP (Vlocale_coding_system)) | |
9945 | { | |
9946 | Lisp_Object dec = code_convert_string_norecord (build_string (str), | |
9947 | Vlocale_coding_system, | |
9948 | 0); | |
d5db4077 | 9949 | str = (char *) SDATA (dec); |
68c45bf0 PE |
9950 | } |
9951 | ||
9952 | return str; | |
9953 | } | |
9954 | ||
4ed46869 | 9955 | #endif /* emacs */ |
9ffd559c KH |
9956 | |
9957 | /* arch-tag: 3a3a2b01-5ff6-4071-9afe-f5b808d9229d | |
9958 | (do not change this comment) */ |