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9542cb1f | 1 | /* Coding system handler (conversion, detection, etc). |
aaef169d | 2 | Copyright (C) 2001, 2002, 2003, 2004, 2005, |
4e6835db | 3 | 2006, 2007 Free Software Foundation, Inc. |
7976eda0 | 4 | Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
4e6835db | 5 | 2005, 2006, 2007 |
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 | ||
44e8490d KH |
332 | /* If a symbol has this property, evaluate the value to define the |
333 | symbol as a coding system. */ | |
334 | static Lisp_Object Qcoding_system_define_form; | |
335 | ||
5d5bf4d8 KH |
336 | int coding_system_require_warning; |
337 | ||
d46c5b12 KH |
338 | Lisp_Object Vselect_safe_coding_system_function; |
339 | ||
7722baf9 EZ |
340 | /* Mnemonic string for each format of end-of-line. */ |
341 | Lisp_Object eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac; | |
342 | /* Mnemonic string to indicate format of end-of-line is not yet | |
4ed46869 | 343 | decided. */ |
7722baf9 | 344 | Lisp_Object eol_mnemonic_undecided; |
4ed46869 | 345 | |
fcbcfb64 KH |
346 | /* Format of end-of-line decided by system. This is Qunix on |
347 | Unix and Mac, Qdos on DOS/Windows. | |
348 | This has an effect only for external encoding (i.e. for output to | |
349 | file and process), not for in-buffer or Lisp string encoding. */ | |
350 | static Lisp_Object system_eol_type; | |
351 | ||
4ed46869 KH |
352 | #ifdef emacs |
353 | ||
4608c386 KH |
354 | Lisp_Object Vcoding_system_list, Vcoding_system_alist; |
355 | ||
356 | Lisp_Object Qcoding_system_p, Qcoding_system_error; | |
4ed46869 | 357 | |
d46c5b12 KH |
358 | /* Coding system emacs-mule and raw-text are for converting only |
359 | end-of-line format. */ | |
360 | Lisp_Object Qemacs_mule, Qraw_text; | |
8f924df7 | 361 | Lisp_Object Qutf_8_emacs; |
ecf488bc | 362 | |
4ed46869 KH |
363 | /* Coding-systems are handed between Emacs Lisp programs and C internal |
364 | routines by the following three variables. */ | |
365 | /* Coding-system for reading files and receiving data from process. */ | |
366 | Lisp_Object Vcoding_system_for_read; | |
367 | /* Coding-system for writing files and sending data to process. */ | |
368 | Lisp_Object Vcoding_system_for_write; | |
369 | /* Coding-system actually used in the latest I/O. */ | |
370 | Lisp_Object Vlast_coding_system_used; | |
065e3595 KH |
371 | /* Set to non-nil when an error is detected while code conversion. */ |
372 | Lisp_Object Vlast_code_conversion_error; | |
c4825358 | 373 | /* A vector of length 256 which contains information about special |
94487c4e | 374 | Latin codes (especially for dealing with Microsoft codes). */ |
3f003981 | 375 | Lisp_Object Vlatin_extra_code_table; |
c4825358 | 376 | |
9ce27fde KH |
377 | /* Flag to inhibit code conversion of end-of-line format. */ |
378 | int inhibit_eol_conversion; | |
379 | ||
74383408 KH |
380 | /* Flag to inhibit ISO2022 escape sequence detection. */ |
381 | int inhibit_iso_escape_detection; | |
382 | ||
ed29121d EZ |
383 | /* Flag to make buffer-file-coding-system inherit from process-coding. */ |
384 | int inherit_process_coding_system; | |
385 | ||
c4825358 KH |
386 | /* Coding system to be used to encode text for terminal display when |
387 | terminal coding system is nil. */ | |
388 | struct coding_system safe_terminal_coding; | |
389 | ||
02ba4723 KH |
390 | Lisp_Object Vfile_coding_system_alist; |
391 | Lisp_Object Vprocess_coding_system_alist; | |
392 | Lisp_Object Vnetwork_coding_system_alist; | |
4ed46869 | 393 | |
68c45bf0 PE |
394 | Lisp_Object Vlocale_coding_system; |
395 | ||
4ed46869 KH |
396 | #endif /* emacs */ |
397 | ||
f967223b KH |
398 | /* Flag to tell if we look up translation table on character code |
399 | conversion. */ | |
84fbb8a0 | 400 | Lisp_Object Venable_character_translation; |
f967223b KH |
401 | /* Standard translation table to look up on decoding (reading). */ |
402 | Lisp_Object Vstandard_translation_table_for_decode; | |
403 | /* Standard translation table to look up on encoding (writing). */ | |
404 | Lisp_Object Vstandard_translation_table_for_encode; | |
84fbb8a0 | 405 | |
f967223b KH |
406 | Lisp_Object Qtranslation_table; |
407 | Lisp_Object Qtranslation_table_id; | |
408 | Lisp_Object Qtranslation_table_for_decode; | |
409 | Lisp_Object Qtranslation_table_for_encode; | |
4ed46869 KH |
410 | |
411 | /* Alist of charsets vs revision number. */ | |
df7492f9 | 412 | static Lisp_Object Vcharset_revision_table; |
4ed46869 | 413 | |
02ba4723 KH |
414 | /* Default coding systems used for process I/O. */ |
415 | Lisp_Object Vdefault_process_coding_system; | |
416 | ||
002fdb44 DL |
417 | /* Char table for translating Quail and self-inserting input. */ |
418 | Lisp_Object Vtranslation_table_for_input; | |
419 | ||
df7492f9 KH |
420 | /* Two special coding systems. */ |
421 | Lisp_Object Vsjis_coding_system; | |
422 | Lisp_Object Vbig5_coding_system; | |
423 | ||
df7492f9 KH |
424 | /* ISO2022 section */ |
425 | ||
426 | #define CODING_ISO_INITIAL(coding, reg) \ | |
427 | (XINT (AREF (AREF (CODING_ID_ATTRS ((coding)->id), \ | |
428 | coding_attr_iso_initial), \ | |
429 | reg))) | |
430 | ||
431 | ||
432 | #define CODING_ISO_REQUEST(coding, charset_id) \ | |
433 | ((charset_id <= (coding)->max_charset_id \ | |
434 | ? (coding)->safe_charsets[charset_id] \ | |
435 | : -1)) | |
436 | ||
437 | ||
438 | #define CODING_ISO_FLAGS(coding) \ | |
439 | ((coding)->spec.iso_2022.flags) | |
440 | #define CODING_ISO_DESIGNATION(coding, reg) \ | |
441 | ((coding)->spec.iso_2022.current_designation[reg]) | |
442 | #define CODING_ISO_INVOCATION(coding, plane) \ | |
443 | ((coding)->spec.iso_2022.current_invocation[plane]) | |
444 | #define CODING_ISO_SINGLE_SHIFTING(coding) \ | |
445 | ((coding)->spec.iso_2022.single_shifting) | |
446 | #define CODING_ISO_BOL(coding) \ | |
447 | ((coding)->spec.iso_2022.bol) | |
448 | #define CODING_ISO_INVOKED_CHARSET(coding, plane) \ | |
449 | CODING_ISO_DESIGNATION ((coding), CODING_ISO_INVOCATION ((coding), (plane))) | |
450 | ||
451 | /* Control characters of ISO2022. */ | |
452 | /* code */ /* function */ | |
453 | #define ISO_CODE_LF 0x0A /* line-feed */ | |
454 | #define ISO_CODE_CR 0x0D /* carriage-return */ | |
455 | #define ISO_CODE_SO 0x0E /* shift-out */ | |
456 | #define ISO_CODE_SI 0x0F /* shift-in */ | |
457 | #define ISO_CODE_SS2_7 0x19 /* single-shift-2 for 7-bit code */ | |
458 | #define ISO_CODE_ESC 0x1B /* escape */ | |
459 | #define ISO_CODE_SS2 0x8E /* single-shift-2 */ | |
460 | #define ISO_CODE_SS3 0x8F /* single-shift-3 */ | |
461 | #define ISO_CODE_CSI 0x9B /* control-sequence-introducer */ | |
462 | ||
463 | /* All code (1-byte) of ISO2022 is classified into one of the | |
464 | followings. */ | |
465 | enum iso_code_class_type | |
466 | { | |
467 | ISO_control_0, /* Control codes in the range | |
468 | 0x00..0x1F and 0x7F, except for the | |
469 | following 5 codes. */ | |
df7492f9 KH |
470 | ISO_shift_out, /* ISO_CODE_SO (0x0E) */ |
471 | ISO_shift_in, /* ISO_CODE_SI (0x0F) */ | |
472 | ISO_single_shift_2_7, /* ISO_CODE_SS2_7 (0x19) */ | |
473 | ISO_escape, /* ISO_CODE_SO (0x1B) */ | |
474 | ISO_control_1, /* Control codes in the range | |
475 | 0x80..0x9F, except for the | |
476 | following 3 codes. */ | |
477 | ISO_single_shift_2, /* ISO_CODE_SS2 (0x8E) */ | |
478 | ISO_single_shift_3, /* ISO_CODE_SS3 (0x8F) */ | |
479 | ISO_control_sequence_introducer, /* ISO_CODE_CSI (0x9B) */ | |
480 | ISO_0x20_or_0x7F, /* Codes of the values 0x20 or 0x7F. */ | |
481 | ISO_graphic_plane_0, /* Graphic codes in the range 0x21..0x7E. */ | |
482 | ISO_0xA0_or_0xFF, /* Codes of the values 0xA0 or 0xFF. */ | |
483 | ISO_graphic_plane_1 /* Graphic codes in the range 0xA1..0xFE. */ | |
484 | }; | |
05e6f5dc | 485 | |
df7492f9 KH |
486 | /** The macros CODING_ISO_FLAG_XXX defines a flag bit of the |
487 | `iso-flags' attribute of an iso2022 coding system. */ | |
05e6f5dc | 488 | |
df7492f9 KH |
489 | /* If set, produce long-form designation sequence (e.g. ESC $ ( A) |
490 | instead of the correct short-form sequence (e.g. ESC $ A). */ | |
491 | #define CODING_ISO_FLAG_LONG_FORM 0x0001 | |
93dec019 | 492 | |
df7492f9 KH |
493 | /* If set, reset graphic planes and registers at end-of-line to the |
494 | initial state. */ | |
495 | #define CODING_ISO_FLAG_RESET_AT_EOL 0x0002 | |
05e6f5dc | 496 | |
df7492f9 KH |
497 | /* If set, reset graphic planes and registers before any control |
498 | characters to the initial state. */ | |
499 | #define CODING_ISO_FLAG_RESET_AT_CNTL 0x0004 | |
05e6f5dc | 500 | |
df7492f9 KH |
501 | /* If set, encode by 7-bit environment. */ |
502 | #define CODING_ISO_FLAG_SEVEN_BITS 0x0008 | |
4ed46869 | 503 | |
df7492f9 KH |
504 | /* If set, use locking-shift function. */ |
505 | #define CODING_ISO_FLAG_LOCKING_SHIFT 0x0010 | |
b73bfc1c | 506 | |
df7492f9 KH |
507 | /* If set, use single-shift function. Overwrite |
508 | CODING_ISO_FLAG_LOCKING_SHIFT. */ | |
509 | #define CODING_ISO_FLAG_SINGLE_SHIFT 0x0020 | |
b73bfc1c | 510 | |
df7492f9 KH |
511 | /* If set, use designation escape sequence. */ |
512 | #define CODING_ISO_FLAG_DESIGNATION 0x0040 | |
b73bfc1c | 513 | |
df7492f9 KH |
514 | /* If set, produce revision number sequence. */ |
515 | #define CODING_ISO_FLAG_REVISION 0x0080 | |
b73bfc1c | 516 | |
df7492f9 KH |
517 | /* If set, produce ISO6429's direction specifying sequence. */ |
518 | #define CODING_ISO_FLAG_DIRECTION 0x0100 | |
f4dee582 | 519 | |
df7492f9 KH |
520 | /* If set, assume designation states are reset at beginning of line on |
521 | output. */ | |
522 | #define CODING_ISO_FLAG_INIT_AT_BOL 0x0200 | |
4ed46869 | 523 | |
df7492f9 KH |
524 | /* If set, designation sequence should be placed at beginning of line |
525 | on output. */ | |
526 | #define CODING_ISO_FLAG_DESIGNATE_AT_BOL 0x0400 | |
aa72b389 | 527 | |
df7492f9 KH |
528 | /* If set, do not encode unsafe charactes on output. */ |
529 | #define CODING_ISO_FLAG_SAFE 0x0800 | |
aa72b389 | 530 | |
df7492f9 KH |
531 | /* If set, extra latin codes (128..159) are accepted as a valid code |
532 | on input. */ | |
533 | #define CODING_ISO_FLAG_LATIN_EXTRA 0x1000 | |
aa72b389 | 534 | |
df7492f9 | 535 | #define CODING_ISO_FLAG_COMPOSITION 0x2000 |
aa72b389 | 536 | |
df7492f9 | 537 | #define CODING_ISO_FLAG_EUC_TW_SHIFT 0x4000 |
aa72b389 | 538 | |
bf16eb23 | 539 | #define CODING_ISO_FLAG_USE_ROMAN 0x8000 |
aa72b389 | 540 | |
bf16eb23 | 541 | #define CODING_ISO_FLAG_USE_OLDJIS 0x10000 |
aa72b389 | 542 | |
bf16eb23 | 543 | #define CODING_ISO_FLAG_FULL_SUPPORT 0x100000 |
aa72b389 | 544 | |
df7492f9 KH |
545 | /* A character to be produced on output if encoding of the original |
546 | character is prohibited by CODING_ISO_FLAG_SAFE. */ | |
547 | #define CODING_INHIBIT_CHARACTER_SUBSTITUTION '?' | |
aa72b389 | 548 | |
4ed46869 | 549 | |
df7492f9 KH |
550 | /* UTF-16 section */ |
551 | #define CODING_UTF_16_BOM(coding) \ | |
552 | ((coding)->spec.utf_16.bom) | |
4ed46869 | 553 | |
df7492f9 KH |
554 | #define CODING_UTF_16_ENDIAN(coding) \ |
555 | ((coding)->spec.utf_16.endian) | |
4ed46869 | 556 | |
df7492f9 KH |
557 | #define CODING_UTF_16_SURROGATE(coding) \ |
558 | ((coding)->spec.utf_16.surrogate) | |
4ed46869 | 559 | |
4ed46869 | 560 | |
df7492f9 KH |
561 | /* CCL section */ |
562 | #define CODING_CCL_DECODER(coding) \ | |
563 | AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_decoder) | |
564 | #define CODING_CCL_ENCODER(coding) \ | |
565 | AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_encoder) | |
566 | #define CODING_CCL_VALIDS(coding) \ | |
8f924df7 | 567 | (SDATA (AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_valids))) |
4ed46869 | 568 | |
5a936b46 | 569 | /* Index for each coding category in `coding_categories' */ |
4ed46869 | 570 | |
df7492f9 KH |
571 | enum coding_category |
572 | { | |
573 | coding_category_iso_7, | |
574 | coding_category_iso_7_tight, | |
575 | coding_category_iso_8_1, | |
576 | coding_category_iso_8_2, | |
577 | coding_category_iso_7_else, | |
578 | coding_category_iso_8_else, | |
579 | coding_category_utf_8, | |
580 | coding_category_utf_16_auto, | |
581 | coding_category_utf_16_be, | |
582 | coding_category_utf_16_le, | |
583 | coding_category_utf_16_be_nosig, | |
584 | coding_category_utf_16_le_nosig, | |
585 | coding_category_charset, | |
586 | coding_category_sjis, | |
587 | coding_category_big5, | |
588 | coding_category_ccl, | |
589 | coding_category_emacs_mule, | |
590 | /* All above are targets of code detection. */ | |
591 | coding_category_raw_text, | |
592 | coding_category_undecided, | |
593 | coding_category_max | |
594 | }; | |
595 | ||
596 | /* Definitions of flag bits used in detect_coding_XXXX. */ | |
597 | #define CATEGORY_MASK_ISO_7 (1 << coding_category_iso_7) | |
598 | #define CATEGORY_MASK_ISO_7_TIGHT (1 << coding_category_iso_7_tight) | |
599 | #define CATEGORY_MASK_ISO_8_1 (1 << coding_category_iso_8_1) | |
600 | #define CATEGORY_MASK_ISO_8_2 (1 << coding_category_iso_8_2) | |
601 | #define CATEGORY_MASK_ISO_7_ELSE (1 << coding_category_iso_7_else) | |
602 | #define CATEGORY_MASK_ISO_8_ELSE (1 << coding_category_iso_8_else) | |
603 | #define CATEGORY_MASK_UTF_8 (1 << coding_category_utf_8) | |
b49a1807 | 604 | #define CATEGORY_MASK_UTF_16_AUTO (1 << coding_category_utf_16_auto) |
df7492f9 KH |
605 | #define CATEGORY_MASK_UTF_16_BE (1 << coding_category_utf_16_be) |
606 | #define CATEGORY_MASK_UTF_16_LE (1 << coding_category_utf_16_le) | |
607 | #define CATEGORY_MASK_UTF_16_BE_NOSIG (1 << coding_category_utf_16_be_nosig) | |
608 | #define CATEGORY_MASK_UTF_16_LE_NOSIG (1 << coding_category_utf_16_le_nosig) | |
609 | #define CATEGORY_MASK_CHARSET (1 << coding_category_charset) | |
610 | #define CATEGORY_MASK_SJIS (1 << coding_category_sjis) | |
611 | #define CATEGORY_MASK_BIG5 (1 << coding_category_big5) | |
612 | #define CATEGORY_MASK_CCL (1 << coding_category_ccl) | |
613 | #define CATEGORY_MASK_EMACS_MULE (1 << coding_category_emacs_mule) | |
ff0dacd7 | 614 | #define CATEGORY_MASK_RAW_TEXT (1 << coding_category_raw_text) |
df7492f9 KH |
615 | |
616 | /* This value is returned if detect_coding_mask () find nothing other | |
617 | than ASCII characters. */ | |
618 | #define CATEGORY_MASK_ANY \ | |
619 | (CATEGORY_MASK_ISO_7 \ | |
620 | | CATEGORY_MASK_ISO_7_TIGHT \ | |
621 | | CATEGORY_MASK_ISO_8_1 \ | |
622 | | CATEGORY_MASK_ISO_8_2 \ | |
623 | | CATEGORY_MASK_ISO_7_ELSE \ | |
624 | | CATEGORY_MASK_ISO_8_ELSE \ | |
625 | | CATEGORY_MASK_UTF_8 \ | |
626 | | CATEGORY_MASK_UTF_16_BE \ | |
627 | | CATEGORY_MASK_UTF_16_LE \ | |
628 | | CATEGORY_MASK_UTF_16_BE_NOSIG \ | |
629 | | CATEGORY_MASK_UTF_16_LE_NOSIG \ | |
630 | | CATEGORY_MASK_CHARSET \ | |
631 | | CATEGORY_MASK_SJIS \ | |
632 | | CATEGORY_MASK_BIG5 \ | |
633 | | CATEGORY_MASK_CCL \ | |
634 | | CATEGORY_MASK_EMACS_MULE) | |
635 | ||
636 | ||
637 | #define CATEGORY_MASK_ISO_7BIT \ | |
638 | (CATEGORY_MASK_ISO_7 | CATEGORY_MASK_ISO_7_TIGHT) | |
639 | ||
640 | #define CATEGORY_MASK_ISO_8BIT \ | |
641 | (CATEGORY_MASK_ISO_8_1 | CATEGORY_MASK_ISO_8_2) | |
642 | ||
643 | #define CATEGORY_MASK_ISO_ELSE \ | |
644 | (CATEGORY_MASK_ISO_7_ELSE | CATEGORY_MASK_ISO_8_ELSE) | |
645 | ||
646 | #define CATEGORY_MASK_ISO_ESCAPE \ | |
647 | (CATEGORY_MASK_ISO_7 \ | |
648 | | CATEGORY_MASK_ISO_7_TIGHT \ | |
649 | | CATEGORY_MASK_ISO_7_ELSE \ | |
650 | | CATEGORY_MASK_ISO_8_ELSE) | |
651 | ||
652 | #define CATEGORY_MASK_ISO \ | |
653 | ( CATEGORY_MASK_ISO_7BIT \ | |
654 | | CATEGORY_MASK_ISO_8BIT \ | |
655 | | CATEGORY_MASK_ISO_ELSE) | |
656 | ||
657 | #define CATEGORY_MASK_UTF_16 \ | |
658 | (CATEGORY_MASK_UTF_16_BE \ | |
659 | | CATEGORY_MASK_UTF_16_LE \ | |
660 | | CATEGORY_MASK_UTF_16_BE_NOSIG \ | |
661 | | CATEGORY_MASK_UTF_16_LE_NOSIG) | |
662 | ||
663 | ||
664 | /* List of symbols `coding-category-xxx' ordered by priority. This | |
665 | variable is exposed to Emacs Lisp. */ | |
666 | static Lisp_Object Vcoding_category_list; | |
667 | ||
668 | /* Table of coding categories (Lisp symbols). This variable is for | |
669 | internal use oly. */ | |
670 | static Lisp_Object Vcoding_category_table; | |
671 | ||
672 | /* Table of coding-categories ordered by priority. */ | |
673 | static enum coding_category coding_priorities[coding_category_max]; | |
674 | ||
675 | /* Nth element is a coding context for the coding system bound to the | |
676 | Nth coding category. */ | |
677 | static struct coding_system coding_categories[coding_category_max]; | |
678 | ||
df7492f9 KH |
679 | /*** Commonly used macros and functions ***/ |
680 | ||
681 | #ifndef min | |
682 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
683 | #endif | |
684 | #ifndef max | |
685 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
686 | #endif | |
4ed46869 | 687 | |
24a73b0a KH |
688 | #define CODING_GET_INFO(coding, attrs, charset_list) \ |
689 | do { \ | |
690 | (attrs) = CODING_ID_ATTRS ((coding)->id); \ | |
691 | (charset_list) = CODING_ATTR_CHARSET_LIST (attrs); \ | |
df7492f9 | 692 | } while (0) |
4ed46869 | 693 | |
4ed46869 | 694 | |
df7492f9 KH |
695 | /* Safely get one byte from the source text pointed by SRC which ends |
696 | at SRC_END, and set C to that byte. If there are not enough bytes | |
065e3595 KH |
697 | in the source, it jumps to `no_more_source'. If multibytep is |
698 | nonzero, and a multibyte character is found at SRC, set C to the | |
699 | negative value of the character code. The caller should declare | |
700 | and set these variables appropriately in advance: | |
701 | src, src_end, multibytep */ | |
aa72b389 | 702 | |
065e3595 KH |
703 | #define ONE_MORE_BYTE(c) \ |
704 | do { \ | |
705 | if (src == src_end) \ | |
706 | { \ | |
707 | if (src_base < src) \ | |
708 | record_conversion_result \ | |
709 | (coding, CODING_RESULT_INSUFFICIENT_SRC); \ | |
710 | goto no_more_source; \ | |
711 | } \ | |
712 | c = *src++; \ | |
713 | if (multibytep && (c & 0x80)) \ | |
714 | { \ | |
715 | if ((c & 0xFE) == 0xC0) \ | |
716 | c = ((c & 1) << 6) | *src++; \ | |
717 | else \ | |
718 | { \ | |
35befdaa KH |
719 | src--; \ |
720 | c = - string_char (src, &src, NULL); \ | |
065e3595 KH |
721 | record_conversion_result \ |
722 | (coding, CODING_RESULT_INVALID_SRC); \ | |
723 | } \ | |
724 | } \ | |
725 | consumed_chars++; \ | |
aa72b389 KH |
726 | } while (0) |
727 | ||
aa72b389 | 728 | |
065e3595 KH |
729 | #define ONE_MORE_BYTE_NO_CHECK(c) \ |
730 | do { \ | |
731 | c = *src++; \ | |
732 | if (multibytep && (c & 0x80)) \ | |
733 | { \ | |
734 | if ((c & 0xFE) == 0xC0) \ | |
735 | c = ((c & 1) << 6) | *src++; \ | |
736 | else \ | |
737 | { \ | |
35befdaa KH |
738 | src--; \ |
739 | c = - string_char (src, &src, NULL); \ | |
065e3595 KH |
740 | record_conversion_result \ |
741 | (coding, CODING_RESULT_INVALID_SRC); \ | |
742 | } \ | |
743 | } \ | |
744 | consumed_chars++; \ | |
aa72b389 KH |
745 | } while (0) |
746 | ||
aa72b389 | 747 | |
df7492f9 KH |
748 | /* Store a byte C in the place pointed by DST and increment DST to the |
749 | next free point, and increment PRODUCED_CHARS. The caller should | |
750 | assure that C is 0..127, and declare and set the variable `dst' | |
751 | appropriately in advance. | |
752 | */ | |
aa72b389 KH |
753 | |
754 | ||
df7492f9 KH |
755 | #define EMIT_ONE_ASCII_BYTE(c) \ |
756 | do { \ | |
757 | produced_chars++; \ | |
758 | *dst++ = (c); \ | |
b6871cc7 | 759 | } while (0) |
aa72b389 KH |
760 | |
761 | ||
df7492f9 | 762 | /* Like EMIT_ONE_ASCII_BYTE byt store two bytes; C1 and C2. */ |
aa72b389 | 763 | |
df7492f9 KH |
764 | #define EMIT_TWO_ASCII_BYTES(c1, c2) \ |
765 | do { \ | |
766 | produced_chars += 2; \ | |
767 | *dst++ = (c1), *dst++ = (c2); \ | |
768 | } while (0) | |
aa72b389 KH |
769 | |
770 | ||
df7492f9 KH |
771 | /* Store a byte C in the place pointed by DST and increment DST to the |
772 | next free point, and increment PRODUCED_CHARS. If MULTIBYTEP is | |
773 | nonzero, store in an appropriate multibyte from. The caller should | |
774 | declare and set the variables `dst' and `multibytep' appropriately | |
775 | in advance. */ | |
776 | ||
777 | #define EMIT_ONE_BYTE(c) \ | |
778 | do { \ | |
779 | produced_chars++; \ | |
780 | if (multibytep) \ | |
781 | { \ | |
782 | int ch = (c); \ | |
783 | if (ch >= 0x80) \ | |
784 | ch = BYTE8_TO_CHAR (ch); \ | |
785 | CHAR_STRING_ADVANCE (ch, dst); \ | |
786 | } \ | |
787 | else \ | |
788 | *dst++ = (c); \ | |
aa72b389 | 789 | } while (0) |
aa72b389 | 790 | |
aa72b389 | 791 | |
df7492f9 | 792 | /* Like EMIT_ONE_BYTE, but emit two bytes; C1 and C2. */ |
aa72b389 | 793 | |
e19c3639 KH |
794 | #define EMIT_TWO_BYTES(c1, c2) \ |
795 | do { \ | |
796 | produced_chars += 2; \ | |
797 | if (multibytep) \ | |
798 | { \ | |
799 | int ch; \ | |
800 | \ | |
801 | ch = (c1); \ | |
802 | if (ch >= 0x80) \ | |
803 | ch = BYTE8_TO_CHAR (ch); \ | |
804 | CHAR_STRING_ADVANCE (ch, dst); \ | |
805 | ch = (c2); \ | |
806 | if (ch >= 0x80) \ | |
807 | ch = BYTE8_TO_CHAR (ch); \ | |
808 | CHAR_STRING_ADVANCE (ch, dst); \ | |
809 | } \ | |
810 | else \ | |
811 | { \ | |
812 | *dst++ = (c1); \ | |
813 | *dst++ = (c2); \ | |
814 | } \ | |
aa72b389 KH |
815 | } while (0) |
816 | ||
817 | ||
df7492f9 KH |
818 | #define EMIT_THREE_BYTES(c1, c2, c3) \ |
819 | do { \ | |
820 | EMIT_ONE_BYTE (c1); \ | |
821 | EMIT_TWO_BYTES (c2, c3); \ | |
822 | } while (0) | |
aa72b389 | 823 | |
aa72b389 | 824 | |
df7492f9 KH |
825 | #define EMIT_FOUR_BYTES(c1, c2, c3, c4) \ |
826 | do { \ | |
827 | EMIT_TWO_BYTES (c1, c2); \ | |
828 | EMIT_TWO_BYTES (c3, c4); \ | |
829 | } while (0) | |
aa72b389 | 830 | |
aa72b389 | 831 | |
f6cbaf43 KH |
832 | /* Prototypes for static functions. */ |
833 | static void record_conversion_result P_ ((struct coding_system *coding, | |
834 | enum coding_result_code result)); | |
835 | static int detect_coding_utf_8 P_ ((struct coding_system *, | |
836 | struct coding_detection_info *info)); | |
837 | static void decode_coding_utf_8 P_ ((struct coding_system *)); | |
838 | static int encode_coding_utf_8 P_ ((struct coding_system *)); | |
839 | ||
840 | static int detect_coding_utf_16 P_ ((struct coding_system *, | |
841 | struct coding_detection_info *info)); | |
842 | static void decode_coding_utf_16 P_ ((struct coding_system *)); | |
843 | static int encode_coding_utf_16 P_ ((struct coding_system *)); | |
844 | ||
845 | static int detect_coding_iso_2022 P_ ((struct coding_system *, | |
846 | struct coding_detection_info *info)); | |
847 | static void decode_coding_iso_2022 P_ ((struct coding_system *)); | |
848 | static int encode_coding_iso_2022 P_ ((struct coding_system *)); | |
849 | ||
850 | static int detect_coding_emacs_mule P_ ((struct coding_system *, | |
851 | struct coding_detection_info *info)); | |
852 | static void decode_coding_emacs_mule P_ ((struct coding_system *)); | |
853 | static int encode_coding_emacs_mule P_ ((struct coding_system *)); | |
854 | ||
855 | static int detect_coding_sjis P_ ((struct coding_system *, | |
856 | struct coding_detection_info *info)); | |
857 | static void decode_coding_sjis P_ ((struct coding_system *)); | |
858 | static int encode_coding_sjis P_ ((struct coding_system *)); | |
859 | ||
860 | static int detect_coding_big5 P_ ((struct coding_system *, | |
861 | struct coding_detection_info *info)); | |
862 | static void decode_coding_big5 P_ ((struct coding_system *)); | |
863 | static int encode_coding_big5 P_ ((struct coding_system *)); | |
864 | ||
865 | static int detect_coding_ccl P_ ((struct coding_system *, | |
866 | struct coding_detection_info *info)); | |
867 | static void decode_coding_ccl P_ ((struct coding_system *)); | |
868 | static int encode_coding_ccl P_ ((struct coding_system *)); | |
869 | ||
870 | static void decode_coding_raw_text P_ ((struct coding_system *)); | |
871 | static int encode_coding_raw_text P_ ((struct coding_system *)); | |
872 | ||
873 | static void coding_set_source P_ ((struct coding_system *)); | |
874 | static void coding_set_destination P_ ((struct coding_system *)); | |
875 | static void coding_alloc_by_realloc P_ ((struct coding_system *, EMACS_INT)); | |
876 | static void coding_alloc_by_making_gap P_ ((struct coding_system *, | |
287c57d7 | 877 | EMACS_INT, EMACS_INT)); |
f6cbaf43 KH |
878 | static unsigned char *alloc_destination P_ ((struct coding_system *, |
879 | EMACS_INT, unsigned char *)); | |
880 | static void setup_iso_safe_charsets P_ ((Lisp_Object)); | |
881 | static unsigned char *encode_designation_at_bol P_ ((struct coding_system *, | |
882 | int *, int *, | |
883 | unsigned char *)); | |
884 | static int detect_eol P_ ((const unsigned char *, | |
885 | EMACS_INT, enum coding_category)); | |
886 | static Lisp_Object adjust_coding_eol_type P_ ((struct coding_system *, int)); | |
887 | static void decode_eol P_ ((struct coding_system *)); | |
888 | static Lisp_Object get_translation_table P_ ((Lisp_Object, int, int *)); | |
889 | static Lisp_Object get_translation P_ ((Lisp_Object, int *, int *, | |
890 | int, int *, int *)); | |
891 | static int produce_chars P_ ((struct coding_system *, Lisp_Object, int)); | |
892 | static INLINE void produce_composition P_ ((struct coding_system *, int *, | |
893 | EMACS_INT)); | |
894 | static INLINE void produce_charset P_ ((struct coding_system *, int *, | |
895 | EMACS_INT)); | |
896 | static void produce_annotation P_ ((struct coding_system *, EMACS_INT)); | |
897 | static int decode_coding P_ ((struct coding_system *)); | |
898 | static INLINE int *handle_composition_annotation P_ ((EMACS_INT, EMACS_INT, | |
899 | struct coding_system *, | |
900 | int *, EMACS_INT *)); | |
901 | static INLINE int *handle_charset_annotation P_ ((EMACS_INT, EMACS_INT, | |
902 | struct coding_system *, | |
903 | int *, EMACS_INT *)); | |
904 | static void consume_chars P_ ((struct coding_system *, Lisp_Object, int)); | |
905 | static int encode_coding P_ ((struct coding_system *)); | |
906 | static Lisp_Object make_conversion_work_buffer P_ ((int)); | |
907 | static Lisp_Object code_conversion_restore P_ ((Lisp_Object)); | |
908 | static INLINE int char_encodable_p P_ ((int, Lisp_Object)); | |
909 | static Lisp_Object make_subsidiaries P_ ((Lisp_Object)); | |
910 | ||
065e3595 KH |
911 | static void |
912 | record_conversion_result (struct coding_system *coding, | |
913 | enum coding_result_code result) | |
914 | { | |
915 | coding->result = result; | |
916 | switch (result) | |
917 | { | |
918 | case CODING_RESULT_INSUFFICIENT_SRC: | |
919 | Vlast_code_conversion_error = Qinsufficient_source; | |
920 | break; | |
921 | case CODING_RESULT_INCONSISTENT_EOL: | |
922 | Vlast_code_conversion_error = Qinconsistent_eol; | |
923 | break; | |
924 | case CODING_RESULT_INVALID_SRC: | |
925 | Vlast_code_conversion_error = Qinvalid_source; | |
926 | break; | |
927 | case CODING_RESULT_INTERRUPT: | |
928 | Vlast_code_conversion_error = Qinterrupted; | |
929 | break; | |
930 | case CODING_RESULT_INSUFFICIENT_MEM: | |
931 | Vlast_code_conversion_error = Qinsufficient_memory; | |
932 | break; | |
35befdaa KH |
933 | default: |
934 | Vlast_code_conversion_error = intern ("Unknown error"); | |
065e3595 KH |
935 | } |
936 | } | |
937 | ||
df7492f9 KH |
938 | #define CODING_DECODE_CHAR(coding, src, src_base, src_end, charset, code, c) \ |
939 | do { \ | |
940 | charset_map_loaded = 0; \ | |
941 | c = DECODE_CHAR (charset, code); \ | |
942 | if (charset_map_loaded) \ | |
943 | { \ | |
8f924df7 | 944 | const unsigned char *orig = coding->source; \ |
df7492f9 KH |
945 | EMACS_INT offset; \ |
946 | \ | |
947 | coding_set_source (coding); \ | |
948 | offset = coding->source - orig; \ | |
949 | src += offset; \ | |
950 | src_base += offset; \ | |
951 | src_end += offset; \ | |
952 | } \ | |
aa72b389 KH |
953 | } while (0) |
954 | ||
955 | ||
df7492f9 KH |
956 | #define ASSURE_DESTINATION(bytes) \ |
957 | do { \ | |
958 | if (dst + (bytes) >= dst_end) \ | |
959 | { \ | |
960 | int more_bytes = charbuf_end - charbuf + (bytes); \ | |
961 | \ | |
962 | dst = alloc_destination (coding, more_bytes, dst); \ | |
963 | dst_end = coding->destination + coding->dst_bytes; \ | |
964 | } \ | |
965 | } while (0) | |
aa72b389 | 966 | |
aa72b389 | 967 | |
aa72b389 | 968 | |
df7492f9 KH |
969 | static void |
970 | coding_set_source (coding) | |
aa72b389 | 971 | struct coding_system *coding; |
aa72b389 | 972 | { |
df7492f9 KH |
973 | if (BUFFERP (coding->src_object)) |
974 | { | |
2cb26057 | 975 | struct buffer *buf = XBUFFER (coding->src_object); |
aa72b389 | 976 | |
df7492f9 | 977 | if (coding->src_pos < 0) |
2cb26057 | 978 | coding->source = BUF_GAP_END_ADDR (buf) + coding->src_pos_byte; |
df7492f9 | 979 | else |
2cb26057 | 980 | coding->source = BUF_BYTE_ADDRESS (buf, coding->src_pos_byte); |
aa72b389 | 981 | } |
df7492f9 | 982 | else if (STRINGP (coding->src_object)) |
aa72b389 | 983 | { |
8f924df7 | 984 | coding->source = SDATA (coding->src_object) + coding->src_pos_byte; |
aa72b389 | 985 | } |
df7492f9 KH |
986 | else |
987 | /* Otherwise, the source is C string and is never relocated | |
988 | automatically. Thus we don't have to update anything. */ | |
989 | ; | |
990 | } | |
aa72b389 | 991 | |
df7492f9 KH |
992 | static void |
993 | coding_set_destination (coding) | |
994 | struct coding_system *coding; | |
995 | { | |
996 | if (BUFFERP (coding->dst_object)) | |
aa72b389 | 997 | { |
df7492f9 | 998 | if (coding->src_pos < 0) |
aa72b389 | 999 | { |
28f67a95 KH |
1000 | coding->destination = BEG_ADDR + coding->dst_pos_byte - 1; |
1001 | coding->dst_bytes = (GAP_END_ADDR | |
1002 | - (coding->src_bytes - coding->consumed) | |
1003 | - coding->destination); | |
aa72b389 | 1004 | } |
df7492f9 | 1005 | else |
28f67a95 KH |
1006 | { |
1007 | /* We are sure that coding->dst_pos_byte is before the gap | |
1008 | of the buffer. */ | |
1009 | coding->destination = (BUF_BEG_ADDR (XBUFFER (coding->dst_object)) | |
1010 | + coding->dst_pos_byte - 1); | |
1011 | coding->dst_bytes = (BUF_GAP_END_ADDR (XBUFFER (coding->dst_object)) | |
1012 | - coding->destination); | |
1013 | } | |
df7492f9 KH |
1014 | } |
1015 | else | |
1016 | /* Otherwise, the destination is C string and is never relocated | |
1017 | automatically. Thus we don't have to update anything. */ | |
1018 | ; | |
1019 | } | |
1020 | ||
1021 | ||
1022 | static void | |
1023 | coding_alloc_by_realloc (coding, bytes) | |
1024 | struct coding_system *coding; | |
1025 | EMACS_INT bytes; | |
1026 | { | |
1027 | coding->destination = (unsigned char *) xrealloc (coding->destination, | |
1028 | coding->dst_bytes + bytes); | |
1029 | coding->dst_bytes += bytes; | |
1030 | } | |
1031 | ||
1032 | static void | |
287c57d7 | 1033 | coding_alloc_by_making_gap (coding, offset, bytes) |
df7492f9 | 1034 | struct coding_system *coding; |
287c57d7 | 1035 | EMACS_INT offset, bytes; |
df7492f9 | 1036 | { |
2c78b7e1 KH |
1037 | if (BUFFERP (coding->dst_object) |
1038 | && EQ (coding->src_object, coding->dst_object)) | |
df7492f9 | 1039 | { |
287c57d7 | 1040 | EMACS_INT add = offset + (coding->src_bytes - coding->consumed); |
df7492f9 | 1041 | |
287c57d7 | 1042 | GPT += offset, GPT_BYTE += offset; |
df7492f9 KH |
1043 | GAP_SIZE -= add; ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; |
1044 | make_gap (bytes); | |
1045 | GAP_SIZE += add; ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
287c57d7 | 1046 | GPT -= offset, GPT_BYTE -= offset; |
df7492f9 | 1047 | } |
730fff51 | 1048 | else |
df7492f9 | 1049 | { |
2c78b7e1 KH |
1050 | Lisp_Object this_buffer; |
1051 | ||
1052 | this_buffer = Fcurrent_buffer (); | |
df7492f9 KH |
1053 | set_buffer_internal (XBUFFER (coding->dst_object)); |
1054 | make_gap (bytes); | |
1055 | set_buffer_internal (XBUFFER (this_buffer)); | |
aa72b389 | 1056 | } |
df7492f9 | 1057 | } |
8f924df7 | 1058 | |
df7492f9 KH |
1059 | |
1060 | static unsigned char * | |
1061 | alloc_destination (coding, nbytes, dst) | |
1062 | struct coding_system *coding; | |
3e139625 | 1063 | EMACS_INT nbytes; |
df7492f9 KH |
1064 | unsigned char *dst; |
1065 | { | |
1066 | EMACS_INT offset = dst - coding->destination; | |
1067 | ||
1068 | if (BUFFERP (coding->dst_object)) | |
287c57d7 | 1069 | coding_alloc_by_making_gap (coding, offset, nbytes); |
aa72b389 | 1070 | else |
df7492f9 | 1071 | coding_alloc_by_realloc (coding, nbytes); |
065e3595 | 1072 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
1073 | coding_set_destination (coding); |
1074 | dst = coding->destination + offset; | |
1075 | return dst; | |
1076 | } | |
aa72b389 | 1077 | |
ff0dacd7 KH |
1078 | /** Macros for annotations. */ |
1079 | ||
1080 | /* Maximum length of annotation data (sum of annotations for | |
1081 | composition and charset). */ | |
69a80ea3 | 1082 | #define MAX_ANNOTATION_LENGTH (4 + (MAX_COMPOSITION_COMPONENTS * 2) - 1 + 4) |
ff0dacd7 KH |
1083 | |
1084 | /* An annotation data is stored in the array coding->charbuf in this | |
1085 | format: | |
69a80ea3 | 1086 | [ -LENGTH ANNOTATION_MASK NCHARS ... ] |
ff0dacd7 KH |
1087 | LENGTH is the number of elements in the annotation. |
1088 | ANNOTATION_MASK is one of CODING_ANNOTATE_XXX_MASK. | |
69a80ea3 | 1089 | NCHARS is the number of characters in the text annotated. |
ff0dacd7 KH |
1090 | |
1091 | The format of the following elements depend on ANNOTATION_MASK. | |
1092 | ||
1093 | In the case of CODING_ANNOTATE_COMPOSITION_MASK, these elements | |
1094 | follows: | |
1095 | ... METHOD [ COMPOSITION-COMPONENTS ... ] | |
1096 | METHOD is one of enum composition_method. | |
1097 | Optionnal COMPOSITION-COMPONENTS are characters and composition | |
1098 | rules. | |
1099 | ||
1100 | In the case of CODING_ANNOTATE_CHARSET_MASK, one element CHARSET-ID | |
1101 | follows. */ | |
1102 | ||
69a80ea3 | 1103 | #define ADD_ANNOTATION_DATA(buf, len, mask, nchars) \ |
ff0dacd7 KH |
1104 | do { \ |
1105 | *(buf)++ = -(len); \ | |
1106 | *(buf)++ = (mask); \ | |
69a80ea3 | 1107 | *(buf)++ = (nchars); \ |
ff0dacd7 KH |
1108 | coding->annotated = 1; \ |
1109 | } while (0); | |
1110 | ||
69a80ea3 KH |
1111 | #define ADD_COMPOSITION_DATA(buf, nchars, method) \ |
1112 | do { \ | |
1113 | ADD_ANNOTATION_DATA (buf, 4, CODING_ANNOTATE_COMPOSITION_MASK, nchars); \ | |
1114 | *buf++ = method; \ | |
ff0dacd7 KH |
1115 | } while (0) |
1116 | ||
1117 | ||
69a80ea3 KH |
1118 | #define ADD_CHARSET_DATA(buf, nchars, id) \ |
1119 | do { \ | |
1120 | ADD_ANNOTATION_DATA (buf, 4, CODING_ANNOTATE_CHARSET_MASK, nchars); \ | |
1121 | *buf++ = id; \ | |
ff0dacd7 KH |
1122 | } while (0) |
1123 | ||
df7492f9 KH |
1124 | \f |
1125 | /*** 2. Emacs' internal format (emacs-utf-8) ***/ | |
1126 | ||
1127 | ||
1128 | ||
1129 | \f | |
1130 | /*** 3. UTF-8 ***/ | |
1131 | ||
1132 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
ff0dacd7 KH |
1133 | Check if a text is encoded in UTF-8. If it is, return 1, else |
1134 | return 0. */ | |
df7492f9 KH |
1135 | |
1136 | #define UTF_8_1_OCTET_P(c) ((c) < 0x80) | |
1137 | #define UTF_8_EXTRA_OCTET_P(c) (((c) & 0xC0) == 0x80) | |
1138 | #define UTF_8_2_OCTET_LEADING_P(c) (((c) & 0xE0) == 0xC0) | |
1139 | #define UTF_8_3_OCTET_LEADING_P(c) (((c) & 0xF0) == 0xE0) | |
1140 | #define UTF_8_4_OCTET_LEADING_P(c) (((c) & 0xF8) == 0xF0) | |
1141 | #define UTF_8_5_OCTET_LEADING_P(c) (((c) & 0xFC) == 0xF8) | |
1142 | ||
1143 | static int | |
ff0dacd7 | 1144 | detect_coding_utf_8 (coding, detect_info) |
df7492f9 | 1145 | struct coding_system *coding; |
ff0dacd7 | 1146 | struct coding_detection_info *detect_info; |
df7492f9 | 1147 | { |
065e3595 | 1148 | const unsigned char *src = coding->source, *src_base; |
8f924df7 | 1149 | const unsigned char *src_end = coding->source + coding->src_bytes; |
df7492f9 KH |
1150 | int multibytep = coding->src_multibyte; |
1151 | int consumed_chars = 0; | |
1152 | int found = 0; | |
1153 | ||
ff0dacd7 | 1154 | detect_info->checked |= CATEGORY_MASK_UTF_8; |
df7492f9 KH |
1155 | /* A coding system of this category is always ASCII compatible. */ |
1156 | src += coding->head_ascii; | |
1157 | ||
1158 | while (1) | |
aa72b389 | 1159 | { |
df7492f9 | 1160 | int c, c1, c2, c3, c4; |
aa72b389 | 1161 | |
065e3595 | 1162 | src_base = src; |
df7492f9 | 1163 | ONE_MORE_BYTE (c); |
065e3595 | 1164 | if (c < 0 || UTF_8_1_OCTET_P (c)) |
df7492f9 KH |
1165 | continue; |
1166 | ONE_MORE_BYTE (c1); | |
065e3595 | 1167 | if (c1 < 0 || ! UTF_8_EXTRA_OCTET_P (c1)) |
df7492f9 KH |
1168 | break; |
1169 | if (UTF_8_2_OCTET_LEADING_P (c)) | |
aa72b389 | 1170 | { |
ff0dacd7 | 1171 | found = CATEGORY_MASK_UTF_8; |
df7492f9 | 1172 | continue; |
aa72b389 | 1173 | } |
df7492f9 | 1174 | ONE_MORE_BYTE (c2); |
065e3595 | 1175 | if (c2 < 0 || ! UTF_8_EXTRA_OCTET_P (c2)) |
df7492f9 KH |
1176 | break; |
1177 | if (UTF_8_3_OCTET_LEADING_P (c)) | |
aa72b389 | 1178 | { |
ff0dacd7 | 1179 | found = CATEGORY_MASK_UTF_8; |
df7492f9 | 1180 | continue; |
aa72b389 | 1181 | } |
df7492f9 | 1182 | ONE_MORE_BYTE (c3); |
065e3595 | 1183 | if (c3 < 0 || ! UTF_8_EXTRA_OCTET_P (c3)) |
df7492f9 KH |
1184 | break; |
1185 | if (UTF_8_4_OCTET_LEADING_P (c)) | |
aa72b389 | 1186 | { |
ff0dacd7 | 1187 | found = CATEGORY_MASK_UTF_8; |
df7492f9 KH |
1188 | continue; |
1189 | } | |
1190 | ONE_MORE_BYTE (c4); | |
065e3595 | 1191 | if (c4 < 0 || ! UTF_8_EXTRA_OCTET_P (c4)) |
df7492f9 KH |
1192 | break; |
1193 | if (UTF_8_5_OCTET_LEADING_P (c)) | |
1194 | { | |
ff0dacd7 | 1195 | found = CATEGORY_MASK_UTF_8; |
df7492f9 KH |
1196 | continue; |
1197 | } | |
1198 | break; | |
aa72b389 | 1199 | } |
ff0dacd7 | 1200 | detect_info->rejected |= CATEGORY_MASK_UTF_8; |
df7492f9 | 1201 | return 0; |
aa72b389 | 1202 | |
df7492f9 | 1203 | no_more_source: |
065e3595 | 1204 | if (src_base < src && coding->mode & CODING_MODE_LAST_BLOCK) |
aa72b389 | 1205 | { |
ff0dacd7 | 1206 | detect_info->rejected |= CATEGORY_MASK_UTF_8; |
89528eb3 | 1207 | return 0; |
aa72b389 | 1208 | } |
ff0dacd7 KH |
1209 | detect_info->found |= found; |
1210 | return 1; | |
aa72b389 KH |
1211 | } |
1212 | ||
4ed46869 | 1213 | |
b73bfc1c | 1214 | static void |
df7492f9 | 1215 | decode_coding_utf_8 (coding) |
b73bfc1c | 1216 | struct coding_system *coding; |
b73bfc1c | 1217 | { |
8f924df7 KH |
1218 | const unsigned char *src = coding->source + coding->consumed; |
1219 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
1220 | const unsigned char *src_base; | |
69a80ea3 KH |
1221 | int *charbuf = coding->charbuf + coding->charbuf_used; |
1222 | int *charbuf_end = coding->charbuf + coding->charbuf_size; | |
df7492f9 KH |
1223 | int consumed_chars = 0, consumed_chars_base; |
1224 | int multibytep = coding->src_multibyte; | |
24a73b0a | 1225 | Lisp_Object attr, charset_list; |
4ed46869 | 1226 | |
24a73b0a | 1227 | CODING_GET_INFO (coding, attr, charset_list); |
df7492f9 KH |
1228 | |
1229 | while (1) | |
b73bfc1c | 1230 | { |
df7492f9 | 1231 | int c, c1, c2, c3, c4, c5; |
ec6d2bb8 | 1232 | |
df7492f9 KH |
1233 | src_base = src; |
1234 | consumed_chars_base = consumed_chars; | |
4af310db | 1235 | |
df7492f9 KH |
1236 | if (charbuf >= charbuf_end) |
1237 | break; | |
1238 | ||
1239 | ONE_MORE_BYTE (c1); | |
065e3595 KH |
1240 | if (c1 < 0) |
1241 | { | |
1242 | c = - c1; | |
1243 | } | |
1244 | else if (UTF_8_1_OCTET_P(c1)) | |
df7492f9 KH |
1245 | { |
1246 | c = c1; | |
4af310db | 1247 | } |
df7492f9 | 1248 | else |
4af310db | 1249 | { |
df7492f9 | 1250 | ONE_MORE_BYTE (c2); |
065e3595 | 1251 | if (c2 < 0 || ! UTF_8_EXTRA_OCTET_P (c2)) |
df7492f9 KH |
1252 | goto invalid_code; |
1253 | if (UTF_8_2_OCTET_LEADING_P (c1)) | |
4af310db | 1254 | { |
b0edb2c5 DL |
1255 | c = ((c1 & 0x1F) << 6) | (c2 & 0x3F); |
1256 | /* Reject overlong sequences here and below. Encoders | |
1257 | producing them are incorrect, they can be misleading, | |
1258 | and they mess up read/write invariance. */ | |
1259 | if (c < 128) | |
1260 | goto invalid_code; | |
4af310db | 1261 | } |
df7492f9 | 1262 | else |
aa72b389 | 1263 | { |
df7492f9 | 1264 | ONE_MORE_BYTE (c3); |
065e3595 | 1265 | if (c3 < 0 || ! UTF_8_EXTRA_OCTET_P (c3)) |
df7492f9 KH |
1266 | goto invalid_code; |
1267 | if (UTF_8_3_OCTET_LEADING_P (c1)) | |
b0edb2c5 DL |
1268 | { |
1269 | c = (((c1 & 0xF) << 12) | |
1270 | | ((c2 & 0x3F) << 6) | (c3 & 0x3F)); | |
72fe1301 DL |
1271 | if (c < 0x800 |
1272 | || (c >= 0xd800 && c < 0xe000)) /* surrogates (invalid) */ | |
b0edb2c5 DL |
1273 | goto invalid_code; |
1274 | } | |
df7492f9 KH |
1275 | else |
1276 | { | |
1277 | ONE_MORE_BYTE (c4); | |
065e3595 | 1278 | if (c4 < 0 || ! UTF_8_EXTRA_OCTET_P (c4)) |
df7492f9 KH |
1279 | goto invalid_code; |
1280 | if (UTF_8_4_OCTET_LEADING_P (c1)) | |
b0edb2c5 | 1281 | { |
df7492f9 KH |
1282 | c = (((c1 & 0x7) << 18) | ((c2 & 0x3F) << 12) |
1283 | | ((c3 & 0x3F) << 6) | (c4 & 0x3F)); | |
b0edb2c5 DL |
1284 | if (c < 0x10000) |
1285 | goto invalid_code; | |
1286 | } | |
df7492f9 KH |
1287 | else |
1288 | { | |
1289 | ONE_MORE_BYTE (c5); | |
065e3595 | 1290 | if (c5 < 0 || ! UTF_8_EXTRA_OCTET_P (c5)) |
df7492f9 KH |
1291 | goto invalid_code; |
1292 | if (UTF_8_5_OCTET_LEADING_P (c1)) | |
1293 | { | |
1294 | c = (((c1 & 0x3) << 24) | ((c2 & 0x3F) << 18) | |
1295 | | ((c3 & 0x3F) << 12) | ((c4 & 0x3F) << 6) | |
1296 | | (c5 & 0x3F)); | |
b0edb2c5 | 1297 | if ((c > MAX_CHAR) || (c < 0x200000)) |
df7492f9 KH |
1298 | goto invalid_code; |
1299 | } | |
1300 | else | |
1301 | goto invalid_code; | |
1302 | } | |
1303 | } | |
aa72b389 | 1304 | } |
b73bfc1c | 1305 | } |
df7492f9 KH |
1306 | |
1307 | *charbuf++ = c; | |
1308 | continue; | |
1309 | ||
1310 | invalid_code: | |
1311 | src = src_base; | |
1312 | consumed_chars = consumed_chars_base; | |
1313 | ONE_MORE_BYTE (c); | |
1314 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
1315 | coding->errors++; | |
aa72b389 KH |
1316 | } |
1317 | ||
df7492f9 KH |
1318 | no_more_source: |
1319 | coding->consumed_char += consumed_chars_base; | |
1320 | coding->consumed = src_base - coding->source; | |
1321 | coding->charbuf_used = charbuf - coding->charbuf; | |
1322 | } | |
1323 | ||
1324 | ||
1325 | static int | |
1326 | encode_coding_utf_8 (coding) | |
1327 | struct coding_system *coding; | |
1328 | { | |
1329 | int multibytep = coding->dst_multibyte; | |
1330 | int *charbuf = coding->charbuf; | |
1331 | int *charbuf_end = charbuf + coding->charbuf_used; | |
1332 | unsigned char *dst = coding->destination + coding->produced; | |
1333 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
e19c3639 | 1334 | int produced_chars = 0; |
df7492f9 KH |
1335 | int c; |
1336 | ||
1337 | if (multibytep) | |
aa72b389 | 1338 | { |
df7492f9 KH |
1339 | int safe_room = MAX_MULTIBYTE_LENGTH * 2; |
1340 | ||
1341 | while (charbuf < charbuf_end) | |
b73bfc1c | 1342 | { |
df7492f9 | 1343 | unsigned char str[MAX_MULTIBYTE_LENGTH], *p, *pend = str; |
8f924df7 | 1344 | |
df7492f9 KH |
1345 | ASSURE_DESTINATION (safe_room); |
1346 | c = *charbuf++; | |
28f67a95 KH |
1347 | if (CHAR_BYTE8_P (c)) |
1348 | { | |
1349 | c = CHAR_TO_BYTE8 (c); | |
1350 | EMIT_ONE_BYTE (c); | |
1351 | } | |
1352 | else | |
1353 | { | |
1354 | CHAR_STRING_ADVANCE (c, pend); | |
1355 | for (p = str; p < pend; p++) | |
1356 | EMIT_ONE_BYTE (*p); | |
1357 | } | |
b73bfc1c | 1358 | } |
aa72b389 | 1359 | } |
df7492f9 KH |
1360 | else |
1361 | { | |
1362 | int safe_room = MAX_MULTIBYTE_LENGTH; | |
1363 | ||
1364 | while (charbuf < charbuf_end) | |
b73bfc1c | 1365 | { |
df7492f9 KH |
1366 | ASSURE_DESTINATION (safe_room); |
1367 | c = *charbuf++; | |
f03caae0 KH |
1368 | if (CHAR_BYTE8_P (c)) |
1369 | *dst++ = CHAR_TO_BYTE8 (c); | |
1370 | else | |
1371 | dst += CHAR_STRING (c, dst); | |
df7492f9 | 1372 | produced_chars++; |
4ed46869 KH |
1373 | } |
1374 | } | |
065e3595 | 1375 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
1376 | coding->produced_char += produced_chars; |
1377 | coding->produced = dst - coding->destination; | |
1378 | return 0; | |
4ed46869 KH |
1379 | } |
1380 | ||
b73bfc1c | 1381 | |
df7492f9 | 1382 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
ff0dacd7 KH |
1383 | Check if a text is encoded in one of UTF-16 based coding systems. |
1384 | If it is, return 1, else return 0. */ | |
aa72b389 | 1385 | |
df7492f9 KH |
1386 | #define UTF_16_HIGH_SURROGATE_P(val) \ |
1387 | (((val) & 0xFC00) == 0xD800) | |
1388 | ||
1389 | #define UTF_16_LOW_SURROGATE_P(val) \ | |
1390 | (((val) & 0xFC00) == 0xDC00) | |
93dec019 | 1391 | |
df7492f9 KH |
1392 | #define UTF_16_INVALID_P(val) \ |
1393 | (((val) == 0xFFFE) \ | |
1394 | || ((val) == 0xFFFF) \ | |
1395 | || UTF_16_LOW_SURROGATE_P (val)) | |
aa72b389 | 1396 | |
aa72b389 | 1397 | |
df7492f9 | 1398 | static int |
ff0dacd7 | 1399 | detect_coding_utf_16 (coding, detect_info) |
aa72b389 | 1400 | struct coding_system *coding; |
ff0dacd7 | 1401 | struct coding_detection_info *detect_info; |
aa72b389 | 1402 | { |
8f924df7 KH |
1403 | const unsigned char *src = coding->source, *src_base = src; |
1404 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
df7492f9 KH |
1405 | int multibytep = coding->src_multibyte; |
1406 | int consumed_chars = 0; | |
1407 | int c1, c2; | |
aa72b389 | 1408 | |
ff0dacd7 | 1409 | detect_info->checked |= CATEGORY_MASK_UTF_16; |
ff0dacd7 | 1410 | if (coding->mode & CODING_MODE_LAST_BLOCK |
24a73b0a | 1411 | && (coding->src_chars & 1)) |
ff0dacd7 KH |
1412 | { |
1413 | detect_info->rejected |= CATEGORY_MASK_UTF_16; | |
1414 | return 0; | |
1415 | } | |
24a73b0a | 1416 | |
df7492f9 KH |
1417 | ONE_MORE_BYTE (c1); |
1418 | ONE_MORE_BYTE (c2); | |
df7492f9 | 1419 | if ((c1 == 0xFF) && (c2 == 0xFE)) |
aa72b389 | 1420 | { |
b49a1807 KH |
1421 | detect_info->found |= (CATEGORY_MASK_UTF_16_LE |
1422 | | CATEGORY_MASK_UTF_16_AUTO); | |
24a73b0a KH |
1423 | detect_info->rejected |= (CATEGORY_MASK_UTF_16_BE |
1424 | | CATEGORY_MASK_UTF_16_BE_NOSIG | |
1425 | | CATEGORY_MASK_UTF_16_LE_NOSIG); | |
aa72b389 | 1426 | } |
df7492f9 | 1427 | else if ((c1 == 0xFE) && (c2 == 0xFF)) |
ff0dacd7 | 1428 | { |
b49a1807 KH |
1429 | detect_info->found |= (CATEGORY_MASK_UTF_16_BE |
1430 | | CATEGORY_MASK_UTF_16_AUTO); | |
24a73b0a KH |
1431 | detect_info->rejected |= (CATEGORY_MASK_UTF_16_LE |
1432 | | CATEGORY_MASK_UTF_16_BE_NOSIG | |
1433 | | CATEGORY_MASK_UTF_16_LE_NOSIG); | |
1434 | } | |
065e3595 | 1435 | else if (c1 >= 0 && c2 >= 0) |
24a73b0a | 1436 | { |
24a73b0a KH |
1437 | detect_info->rejected |
1438 | |= (CATEGORY_MASK_UTF_16_BE | CATEGORY_MASK_UTF_16_LE); | |
ff0dacd7 | 1439 | } |
df7492f9 | 1440 | no_more_source: |
ff0dacd7 | 1441 | return 1; |
df7492f9 | 1442 | } |
aa72b389 | 1443 | |
df7492f9 KH |
1444 | static void |
1445 | decode_coding_utf_16 (coding) | |
1446 | struct coding_system *coding; | |
1447 | { | |
8f924df7 KH |
1448 | const unsigned char *src = coding->source + coding->consumed; |
1449 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
1450 | const unsigned char *src_base; | |
69a80ea3 KH |
1451 | int *charbuf = coding->charbuf + coding->charbuf_used; |
1452 | int *charbuf_end = coding->charbuf + coding->charbuf_size; | |
df7492f9 KH |
1453 | int consumed_chars = 0, consumed_chars_base; |
1454 | int multibytep = coding->src_multibyte; | |
1455 | enum utf_16_bom_type bom = CODING_UTF_16_BOM (coding); | |
1456 | enum utf_16_endian_type endian = CODING_UTF_16_ENDIAN (coding); | |
1457 | int surrogate = CODING_UTF_16_SURROGATE (coding); | |
24a73b0a | 1458 | Lisp_Object attr, charset_list; |
df7492f9 | 1459 | |
24a73b0a | 1460 | CODING_GET_INFO (coding, attr, charset_list); |
df7492f9 | 1461 | |
b49a1807 | 1462 | if (bom == utf_16_with_bom) |
aa72b389 | 1463 | { |
df7492f9 | 1464 | int c, c1, c2; |
4af310db | 1465 | |
aa72b389 | 1466 | src_base = src; |
df7492f9 KH |
1467 | ONE_MORE_BYTE (c1); |
1468 | ONE_MORE_BYTE (c2); | |
e19c3639 | 1469 | c = (c1 << 8) | c2; |
aa72b389 | 1470 | |
b49a1807 KH |
1471 | if (endian == utf_16_big_endian |
1472 | ? c != 0xFEFF : c != 0xFFFE) | |
aa72b389 | 1473 | { |
b49a1807 KH |
1474 | /* The first two bytes are not BOM. Treat them as bytes |
1475 | for a normal character. */ | |
1476 | src = src_base; | |
1477 | coding->errors++; | |
aa72b389 | 1478 | } |
b49a1807 KH |
1479 | CODING_UTF_16_BOM (coding) = utf_16_without_bom; |
1480 | } | |
1481 | else if (bom == utf_16_detect_bom) | |
1482 | { | |
1483 | /* We have already tried to detect BOM and failed in | |
1484 | detect_coding. */ | |
1485 | CODING_UTF_16_BOM (coding) = utf_16_without_bom; | |
df7492f9 | 1486 | } |
aa72b389 | 1487 | |
df7492f9 KH |
1488 | while (1) |
1489 | { | |
1490 | int c, c1, c2; | |
1491 | ||
1492 | src_base = src; | |
1493 | consumed_chars_base = consumed_chars; | |
1494 | ||
1495 | if (charbuf + 2 >= charbuf_end) | |
1496 | break; | |
1497 | ||
1498 | ONE_MORE_BYTE (c1); | |
065e3595 KH |
1499 | if (c1 < 0) |
1500 | { | |
1501 | *charbuf++ = -c1; | |
1502 | continue; | |
1503 | } | |
df7492f9 | 1504 | ONE_MORE_BYTE (c2); |
065e3595 KH |
1505 | if (c2 < 0) |
1506 | { | |
1507 | *charbuf++ = ASCII_BYTE_P (c1) ? c1 : BYTE8_TO_CHAR (c1); | |
1508 | *charbuf++ = -c2; | |
1509 | continue; | |
1510 | } | |
df7492f9 | 1511 | c = (endian == utf_16_big_endian |
e19c3639 | 1512 | ? ((c1 << 8) | c2) : ((c2 << 8) | c1)); |
df7492f9 | 1513 | if (surrogate) |
fd3ae0b9 | 1514 | { |
df7492f9 | 1515 | if (! UTF_16_LOW_SURROGATE_P (c)) |
fd3ae0b9 | 1516 | { |
df7492f9 KH |
1517 | if (endian == utf_16_big_endian) |
1518 | c1 = surrogate >> 8, c2 = surrogate & 0xFF; | |
1519 | else | |
1520 | c1 = surrogate & 0xFF, c2 = surrogate >> 8; | |
1521 | *charbuf++ = c1; | |
1522 | *charbuf++ = c2; | |
1523 | coding->errors++; | |
1524 | if (UTF_16_HIGH_SURROGATE_P (c)) | |
1525 | CODING_UTF_16_SURROGATE (coding) = surrogate = c; | |
fd3ae0b9 | 1526 | else |
df7492f9 | 1527 | *charbuf++ = c; |
fd3ae0b9 KH |
1528 | } |
1529 | else | |
df7492f9 KH |
1530 | { |
1531 | c = ((surrogate - 0xD800) << 10) | (c - 0xDC00); | |
1532 | CODING_UTF_16_SURROGATE (coding) = surrogate = 0; | |
29f7ffd0 | 1533 | *charbuf++ = 0x10000 + c; |
df7492f9 | 1534 | } |
fd3ae0b9 | 1535 | } |
aa72b389 | 1536 | else |
df7492f9 KH |
1537 | { |
1538 | if (UTF_16_HIGH_SURROGATE_P (c)) | |
1539 | CODING_UTF_16_SURROGATE (coding) = surrogate = c; | |
1540 | else | |
1541 | *charbuf++ = c; | |
8f924df7 | 1542 | } |
aa72b389 | 1543 | } |
df7492f9 KH |
1544 | |
1545 | no_more_source: | |
1546 | coding->consumed_char += consumed_chars_base; | |
1547 | coding->consumed = src_base - coding->source; | |
1548 | coding->charbuf_used = charbuf - coding->charbuf; | |
aa72b389 | 1549 | } |
b73bfc1c | 1550 | |
df7492f9 KH |
1551 | static int |
1552 | encode_coding_utf_16 (coding) | |
1553 | struct coding_system *coding; | |
1554 | { | |
1555 | int multibytep = coding->dst_multibyte; | |
1556 | int *charbuf = coding->charbuf; | |
1557 | int *charbuf_end = charbuf + coding->charbuf_used; | |
1558 | unsigned char *dst = coding->destination + coding->produced; | |
1559 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
1560 | int safe_room = 8; | |
1561 | enum utf_16_bom_type bom = CODING_UTF_16_BOM (coding); | |
1562 | int big_endian = CODING_UTF_16_ENDIAN (coding) == utf_16_big_endian; | |
1563 | int produced_chars = 0; | |
24a73b0a | 1564 | Lisp_Object attrs, charset_list; |
df7492f9 | 1565 | int c; |
4ed46869 | 1566 | |
24a73b0a | 1567 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 | 1568 | |
b49a1807 | 1569 | if (bom != utf_16_without_bom) |
df7492f9 KH |
1570 | { |
1571 | ASSURE_DESTINATION (safe_room); | |
1572 | if (big_endian) | |
df7492f9 | 1573 | EMIT_TWO_BYTES (0xFE, 0xFF); |
880cf180 KH |
1574 | else |
1575 | EMIT_TWO_BYTES (0xFF, 0xFE); | |
df7492f9 KH |
1576 | CODING_UTF_16_BOM (coding) = utf_16_without_bom; |
1577 | } | |
1578 | ||
1579 | while (charbuf < charbuf_end) | |
1580 | { | |
1581 | ASSURE_DESTINATION (safe_room); | |
1582 | c = *charbuf++; | |
e19c3639 KH |
1583 | if (c >= MAX_UNICODE_CHAR) |
1584 | c = coding->default_char; | |
df7492f9 KH |
1585 | |
1586 | if (c < 0x10000) | |
1587 | { | |
1588 | if (big_endian) | |
1589 | EMIT_TWO_BYTES (c >> 8, c & 0xFF); | |
1590 | else | |
1591 | EMIT_TWO_BYTES (c & 0xFF, c >> 8); | |
1592 | } | |
1593 | else | |
1594 | { | |
1595 | int c1, c2; | |
1596 | ||
1597 | c -= 0x10000; | |
1598 | c1 = (c >> 10) + 0xD800; | |
1599 | c2 = (c & 0x3FF) + 0xDC00; | |
1600 | if (big_endian) | |
1601 | EMIT_FOUR_BYTES (c1 >> 8, c1 & 0xFF, c2 >> 8, c2 & 0xFF); | |
1602 | else | |
1603 | EMIT_FOUR_BYTES (c1 & 0xFF, c1 >> 8, c2 & 0xFF, c2 >> 8); | |
1604 | } | |
1605 | } | |
065e3595 | 1606 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
1607 | coding->produced = dst - coding->destination; |
1608 | coding->produced_char += produced_chars; | |
1609 | return 0; | |
1610 | } | |
1611 | ||
1612 | \f | |
1613 | /*** 6. Old Emacs' internal format (emacs-mule) ***/ | |
1614 | ||
1615 | /* Emacs' internal format for representation of multiple character | |
1616 | sets is a kind of multi-byte encoding, i.e. characters are | |
1617 | represented by variable-length sequences of one-byte codes. | |
1618 | ||
1619 | ASCII characters and control characters (e.g. `tab', `newline') are | |
1620 | represented by one-byte sequences which are their ASCII codes, in | |
1621 | the range 0x00 through 0x7F. | |
1622 | ||
1623 | 8-bit characters of the range 0x80..0x9F are represented by | |
1624 | two-byte sequences of LEADING_CODE_8_BIT_CONTROL and (their 8-bit | |
1625 | code + 0x20). | |
1626 | ||
1627 | 8-bit characters of the range 0xA0..0xFF are represented by | |
1628 | one-byte sequences which are their 8-bit code. | |
1629 | ||
1630 | The other characters are represented by a sequence of `base | |
1631 | leading-code', optional `extended leading-code', and one or two | |
1632 | `position-code's. The length of the sequence is determined by the | |
1633 | base leading-code. Leading-code takes the range 0x81 through 0x9D, | |
1634 | whereas extended leading-code and position-code take the range 0xA0 | |
1635 | through 0xFF. See `charset.h' for more details about leading-code | |
1636 | and position-code. | |
1637 | ||
1638 | --- CODE RANGE of Emacs' internal format --- | |
1639 | character set range | |
1640 | ------------- ----- | |
1641 | ascii 0x00..0x7F | |
1642 | eight-bit-control LEADING_CODE_8_BIT_CONTROL + 0xA0..0xBF | |
1643 | eight-bit-graphic 0xA0..0xBF | |
1644 | ELSE 0x81..0x9D + [0xA0..0xFF]+ | |
1645 | --------------------------------------------- | |
1646 | ||
1647 | As this is the internal character representation, the format is | |
1648 | usually not used externally (i.e. in a file or in a data sent to a | |
1649 | process). But, it is possible to have a text externally in this | |
1650 | format (i.e. by encoding by the coding system `emacs-mule'). | |
1651 | ||
1652 | In that case, a sequence of one-byte codes has a slightly different | |
1653 | form. | |
1654 | ||
1655 | At first, all characters in eight-bit-control are represented by | |
1656 | one-byte sequences which are their 8-bit code. | |
1657 | ||
1658 | Next, character composition data are represented by the byte | |
1659 | sequence of the form: 0x80 METHOD BYTES CHARS COMPONENT ..., | |
1660 | where, | |
1661 | METHOD is 0xF0 plus one of composition method (enum | |
1662 | composition_method), | |
1663 | ||
1664 | BYTES is 0xA0 plus a byte length of this composition data, | |
1665 | ||
1666 | CHARS is 0x20 plus a number of characters composed by this | |
1667 | data, | |
1668 | ||
1669 | COMPONENTs are characters of multibye form or composition | |
1670 | rules encoded by two-byte of ASCII codes. | |
1671 | ||
1672 | In addition, for backward compatibility, the following formats are | |
1673 | also recognized as composition data on decoding. | |
1674 | ||
1675 | 0x80 MSEQ ... | |
1676 | 0x80 0xFF MSEQ RULE MSEQ RULE ... MSEQ | |
1677 | ||
1678 | Here, | |
1679 | MSEQ is a multibyte form but in these special format: | |
1680 | ASCII: 0xA0 ASCII_CODE+0x80, | |
1681 | other: LEADING_CODE+0x20 FOLLOWING-BYTE ..., | |
1682 | RULE is a one byte code of the range 0xA0..0xF0 that | |
1683 | represents a composition rule. | |
1684 | */ | |
1685 | ||
1686 | char emacs_mule_bytes[256]; | |
1687 | ||
df7492f9 | 1688 | int |
ff0dacd7 | 1689 | emacs_mule_char (coding, src, nbytes, nchars, id) |
df7492f9 | 1690 | struct coding_system *coding; |
065e3595 | 1691 | const unsigned char *src; |
ff0dacd7 | 1692 | int *nbytes, *nchars, *id; |
df7492f9 | 1693 | { |
8f924df7 KH |
1694 | const unsigned char *src_end = coding->source + coding->src_bytes; |
1695 | const unsigned char *src_base = src; | |
df7492f9 | 1696 | int multibytep = coding->src_multibyte; |
df7492f9 KH |
1697 | struct charset *charset; |
1698 | unsigned code; | |
1699 | int c; | |
1700 | int consumed_chars = 0; | |
1701 | ||
1702 | ONE_MORE_BYTE (c); | |
065e3595 | 1703 | if (c < 0) |
df7492f9 | 1704 | { |
065e3595 KH |
1705 | c = -c; |
1706 | charset = emacs_mule_charset[0]; | |
1707 | } | |
1708 | else | |
1709 | { | |
4d41e8b7 KH |
1710 | if (c >= 0xA0) |
1711 | { | |
1712 | /* Old style component character of a compostion. */ | |
1713 | if (c == 0xA0) | |
1714 | { | |
1715 | ONE_MORE_BYTE (c); | |
1716 | c -= 0x80; | |
1717 | } | |
1718 | else | |
1719 | c -= 0x20; | |
1720 | } | |
1721 | ||
065e3595 | 1722 | switch (emacs_mule_bytes[c]) |
b73bfc1c | 1723 | { |
065e3595 | 1724 | case 2: |
df7492f9 KH |
1725 | if (! (charset = emacs_mule_charset[c])) |
1726 | goto invalid_code; | |
1727 | ONE_MORE_BYTE (c); | |
9ffd559c | 1728 | if (c < 0xA0) |
065e3595 | 1729 | goto invalid_code; |
df7492f9 | 1730 | code = c & 0x7F; |
065e3595 KH |
1731 | break; |
1732 | ||
1733 | case 3: | |
1734 | if (c == EMACS_MULE_LEADING_CODE_PRIVATE_11 | |
1735 | || c == EMACS_MULE_LEADING_CODE_PRIVATE_12) | |
1736 | { | |
1737 | ONE_MORE_BYTE (c); | |
9ffd559c | 1738 | if (c < 0xA0 || ! (charset = emacs_mule_charset[c])) |
065e3595 KH |
1739 | goto invalid_code; |
1740 | ONE_MORE_BYTE (c); | |
9ffd559c | 1741 | if (c < 0xA0) |
065e3595 KH |
1742 | goto invalid_code; |
1743 | code = c & 0x7F; | |
1744 | } | |
1745 | else | |
1746 | { | |
1747 | if (! (charset = emacs_mule_charset[c])) | |
1748 | goto invalid_code; | |
1749 | ONE_MORE_BYTE (c); | |
9ffd559c | 1750 | if (c < 0xA0) |
065e3595 KH |
1751 | goto invalid_code; |
1752 | code = (c & 0x7F) << 8; | |
1753 | ONE_MORE_BYTE (c); | |
9ffd559c | 1754 | if (c < 0xA0) |
065e3595 KH |
1755 | goto invalid_code; |
1756 | code |= c & 0x7F; | |
1757 | } | |
1758 | break; | |
1759 | ||
1760 | case 4: | |
1761 | ONE_MORE_BYTE (c); | |
1762 | if (c < 0 || ! (charset = emacs_mule_charset[c])) | |
df7492f9 KH |
1763 | goto invalid_code; |
1764 | ONE_MORE_BYTE (c); | |
9ffd559c | 1765 | if (c < 0xA0) |
065e3595 | 1766 | goto invalid_code; |
781d7a48 | 1767 | code = (c & 0x7F) << 8; |
df7492f9 | 1768 | ONE_MORE_BYTE (c); |
9ffd559c | 1769 | if (c < 0xA0) |
065e3595 | 1770 | goto invalid_code; |
df7492f9 | 1771 | code |= c & 0x7F; |
065e3595 | 1772 | break; |
df7492f9 | 1773 | |
065e3595 KH |
1774 | case 1: |
1775 | code = c; | |
1776 | charset = CHARSET_FROM_ID (ASCII_BYTE_P (code) | |
1777 | ? charset_ascii : charset_eight_bit); | |
1778 | break; | |
df7492f9 | 1779 | |
065e3595 KH |
1780 | default: |
1781 | abort (); | |
1782 | } | |
1783 | c = DECODE_CHAR (charset, code); | |
1784 | if (c < 0) | |
1785 | goto invalid_code; | |
df7492f9 | 1786 | } |
df7492f9 KH |
1787 | *nbytes = src - src_base; |
1788 | *nchars = consumed_chars; | |
ff0dacd7 KH |
1789 | if (id) |
1790 | *id = charset->id; | |
df7492f9 KH |
1791 | return c; |
1792 | ||
1793 | no_more_source: | |
1794 | return -2; | |
1795 | ||
1796 | invalid_code: | |
1797 | return -1; | |
1798 | } | |
1799 | ||
1800 | ||
1801 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
ff0dacd7 KH |
1802 | Check if a text is encoded in `emacs-mule'. If it is, return 1, |
1803 | else return 0. */ | |
df7492f9 KH |
1804 | |
1805 | static int | |
ff0dacd7 | 1806 | detect_coding_emacs_mule (coding, detect_info) |
df7492f9 | 1807 | struct coding_system *coding; |
ff0dacd7 | 1808 | struct coding_detection_info *detect_info; |
df7492f9 | 1809 | { |
065e3595 | 1810 | const unsigned char *src = coding->source, *src_base; |
8f924df7 | 1811 | const unsigned char *src_end = coding->source + coding->src_bytes; |
df7492f9 KH |
1812 | int multibytep = coding->src_multibyte; |
1813 | int consumed_chars = 0; | |
1814 | int c; | |
1815 | int found = 0; | |
1816 | ||
ff0dacd7 | 1817 | detect_info->checked |= CATEGORY_MASK_EMACS_MULE; |
df7492f9 KH |
1818 | /* A coding system of this category is always ASCII compatible. */ |
1819 | src += coding->head_ascii; | |
1820 | ||
1821 | while (1) | |
1822 | { | |
065e3595 | 1823 | src_base = src; |
df7492f9 | 1824 | ONE_MORE_BYTE (c); |
065e3595 KH |
1825 | if (c < 0) |
1826 | continue; | |
df7492f9 KH |
1827 | if (c == 0x80) |
1828 | { | |
1829 | /* Perhaps the start of composite character. We simple skip | |
1830 | it because analyzing it is too heavy for detecting. But, | |
1831 | at least, we check that the composite character | |
1832 | constitues of more than 4 bytes. */ | |
8f924df7 | 1833 | const unsigned char *src_base; |
df7492f9 KH |
1834 | |
1835 | repeat: | |
1836 | src_base = src; | |
1837 | do | |
1838 | { | |
1839 | ONE_MORE_BYTE (c); | |
1840 | } | |
1841 | while (c >= 0xA0); | |
1842 | ||
1843 | if (src - src_base <= 4) | |
1844 | break; | |
ff0dacd7 | 1845 | found = CATEGORY_MASK_EMACS_MULE; |
df7492f9 KH |
1846 | if (c == 0x80) |
1847 | goto repeat; | |
b73bfc1c | 1848 | } |
df7492f9 KH |
1849 | |
1850 | if (c < 0x80) | |
b73bfc1c | 1851 | { |
df7492f9 KH |
1852 | if (c < 0x20 |
1853 | && (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)) | |
1854 | break; | |
1855 | } | |
1856 | else | |
1857 | { | |
0e219d54 | 1858 | int more_bytes = emacs_mule_bytes[*src_base] - 1; |
df7492f9 | 1859 | |
0e219d54 | 1860 | while (more_bytes > 0) |
df7492f9 KH |
1861 | { |
1862 | ONE_MORE_BYTE (c); | |
0e219d54 KH |
1863 | if (c < 0xA0) |
1864 | { | |
1865 | src--; /* Unread the last byte. */ | |
1866 | break; | |
1867 | } | |
1868 | more_bytes--; | |
df7492f9 | 1869 | } |
0e219d54 | 1870 | if (more_bytes != 0) |
df7492f9 | 1871 | break; |
ff0dacd7 | 1872 | found = CATEGORY_MASK_EMACS_MULE; |
4ed46869 KH |
1873 | } |
1874 | } | |
ff0dacd7 | 1875 | detect_info->rejected |= CATEGORY_MASK_EMACS_MULE; |
df7492f9 KH |
1876 | return 0; |
1877 | ||
1878 | no_more_source: | |
065e3595 | 1879 | if (src_base < src && coding->mode & CODING_MODE_LAST_BLOCK) |
89528eb3 | 1880 | { |
ff0dacd7 | 1881 | detect_info->rejected |= CATEGORY_MASK_EMACS_MULE; |
89528eb3 KH |
1882 | return 0; |
1883 | } | |
ff0dacd7 KH |
1884 | detect_info->found |= found; |
1885 | return 1; | |
4ed46869 KH |
1886 | } |
1887 | ||
b73bfc1c | 1888 | |
df7492f9 KH |
1889 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
1890 | ||
1891 | /* Decode a character represented as a component of composition | |
1892 | sequence of Emacs 20/21 style at SRC. Set C to that character and | |
1893 | update SRC to the head of next character (or an encoded composition | |
1894 | rule). If SRC doesn't points a composition component, set C to -1. | |
1895 | If SRC points an invalid byte sequence, global exit by a return | |
1896 | value 0. */ | |
1897 | ||
1898 | #define DECODE_EMACS_MULE_COMPOSITION_CHAR(buf) \ | |
1899 | if (1) \ | |
1900 | { \ | |
1901 | int c; \ | |
1902 | int nbytes, nchars; \ | |
1903 | \ | |
1904 | if (src == src_end) \ | |
1905 | break; \ | |
ff0dacd7 | 1906 | c = emacs_mule_char (coding, src, &nbytes, &nchars, NULL);\ |
df7492f9 KH |
1907 | if (c < 0) \ |
1908 | { \ | |
1909 | if (c == -2) \ | |
1910 | break; \ | |
1911 | goto invalid_code; \ | |
1912 | } \ | |
1913 | *buf++ = c; \ | |
1914 | src += nbytes; \ | |
1915 | consumed_chars += nchars; \ | |
1916 | } \ | |
1917 | else | |
1918 | ||
1919 | ||
1920 | /* Decode a composition rule represented as a component of composition | |
781d7a48 KH |
1921 | sequence of Emacs 20 style at SRC. Store the decoded rule in *BUF, |
1922 | and increment BUF. If SRC points an invalid byte sequence, set C | |
1923 | to -1. */ | |
df7492f9 | 1924 | |
781d7a48 | 1925 | #define DECODE_EMACS_MULE_COMPOSITION_RULE_20(buf) \ |
df7492f9 KH |
1926 | do { \ |
1927 | int c, gref, nref; \ | |
1928 | \ | |
781d7a48 | 1929 | if (src >= src_end) \ |
df7492f9 KH |
1930 | goto invalid_code; \ |
1931 | ONE_MORE_BYTE_NO_CHECK (c); \ | |
4d41e8b7 | 1932 | c -= 0xA0; \ |
df7492f9 KH |
1933 | if (c < 0 || c >= 81) \ |
1934 | goto invalid_code; \ | |
1935 | \ | |
1936 | gref = c / 9, nref = c % 9; \ | |
1937 | *buf++ = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
1938 | } while (0) | |
1939 | ||
1940 | ||
781d7a48 KH |
1941 | /* Decode a composition rule represented as a component of composition |
1942 | sequence of Emacs 21 style at SRC. Store the decoded rule in *BUF, | |
1943 | and increment BUF. If SRC points an invalid byte sequence, set C | |
1944 | to -1. */ | |
1945 | ||
1946 | #define DECODE_EMACS_MULE_COMPOSITION_RULE_21(buf) \ | |
1947 | do { \ | |
1948 | int gref, nref; \ | |
1949 | \ | |
1950 | if (src + 1>= src_end) \ | |
1951 | goto invalid_code; \ | |
1952 | ONE_MORE_BYTE_NO_CHECK (gref); \ | |
1953 | gref -= 0x20; \ | |
1954 | ONE_MORE_BYTE_NO_CHECK (nref); \ | |
1955 | nref -= 0x20; \ | |
1956 | if (gref < 0 || gref >= 81 \ | |
1957 | || nref < 0 || nref >= 81) \ | |
1958 | goto invalid_code; \ | |
1959 | *buf++ = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
1960 | } while (0) | |
1961 | ||
1962 | ||
df7492f9 | 1963 | #define DECODE_EMACS_MULE_21_COMPOSITION(c) \ |
aa72b389 | 1964 | do { \ |
df7492f9 | 1965 | /* Emacs 21 style format. The first three bytes at SRC are \ |
781d7a48 | 1966 | (METHOD - 0xF2), (BYTES - 0xA0), (CHARS - 0xA0), where BYTES is \ |
df7492f9 KH |
1967 | the byte length of this composition information, CHARS is the \ |
1968 | number of characters composed by this composition. */ \ | |
781d7a48 KH |
1969 | enum composition_method method = c - 0xF2; \ |
1970 | int *charbuf_base = charbuf; \ | |
df7492f9 KH |
1971 | int consumed_chars_limit; \ |
1972 | int nbytes, nchars; \ | |
1973 | \ | |
1974 | ONE_MORE_BYTE (c); \ | |
065e3595 KH |
1975 | if (c < 0) \ |
1976 | goto invalid_code; \ | |
df7492f9 KH |
1977 | nbytes = c - 0xA0; \ |
1978 | if (nbytes < 3) \ | |
1979 | goto invalid_code; \ | |
1980 | ONE_MORE_BYTE (c); \ | |
065e3595 KH |
1981 | if (c < 0) \ |
1982 | goto invalid_code; \ | |
df7492f9 | 1983 | nchars = c - 0xA0; \ |
69a80ea3 | 1984 | ADD_COMPOSITION_DATA (charbuf, nchars, method); \ |
df7492f9 KH |
1985 | consumed_chars_limit = consumed_chars_base + nbytes; \ |
1986 | if (method != COMPOSITION_RELATIVE) \ | |
aa72b389 | 1987 | { \ |
df7492f9 KH |
1988 | int i = 0; \ |
1989 | while (consumed_chars < consumed_chars_limit) \ | |
aa72b389 | 1990 | { \ |
df7492f9 | 1991 | if (i % 2 && method != COMPOSITION_WITH_ALTCHARS) \ |
781d7a48 | 1992 | DECODE_EMACS_MULE_COMPOSITION_RULE_21 (charbuf); \ |
df7492f9 KH |
1993 | else \ |
1994 | DECODE_EMACS_MULE_COMPOSITION_CHAR (charbuf); \ | |
781d7a48 | 1995 | i++; \ |
aa72b389 | 1996 | } \ |
df7492f9 KH |
1997 | if (consumed_chars < consumed_chars_limit) \ |
1998 | goto invalid_code; \ | |
781d7a48 | 1999 | charbuf_base[0] -= i; \ |
aa72b389 KH |
2000 | } \ |
2001 | } while (0) | |
93dec019 | 2002 | |
aa72b389 | 2003 | |
d959f512 KH |
2004 | #define DECODE_EMACS_MULE_20_RELATIVE_COMPOSITION(c) \ |
2005 | do { \ | |
2006 | /* Emacs 20 style format for relative composition. */ \ | |
2007 | /* Store multibyte form of characters to be composed. */ \ | |
2008 | enum composition_method method = COMPOSITION_RELATIVE; \ | |
2009 | int components[MAX_COMPOSITION_COMPONENTS * 2 - 1]; \ | |
2010 | int *buf = components; \ | |
2011 | int i, j; \ | |
2012 | \ | |
2013 | src = src_base; \ | |
2014 | ONE_MORE_BYTE (c); /* skip 0x80 */ \ | |
2015 | for (i = 0; *src >= 0xA0 && i < MAX_COMPOSITION_COMPONENTS; i++) \ | |
2016 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ | |
2017 | if (i < 2) \ | |
2018 | goto invalid_code; \ | |
2019 | ADD_COMPOSITION_DATA (charbuf, i, method); \ | |
2020 | for (j = 0; j < i; j++) \ | |
2021 | *charbuf++ = components[j]; \ | |
df7492f9 KH |
2022 | } while (0) |
2023 | ||
2024 | ||
2025 | #define DECODE_EMACS_MULE_20_RULEBASE_COMPOSITION(c) \ | |
2026 | do { \ | |
2027 | /* Emacs 20 style format for rule-base composition. */ \ | |
2028 | /* Store multibyte form of characters to be composed. */ \ | |
ff0dacd7 | 2029 | enum composition_method method = COMPOSITION_WITH_RULE; \ |
4d41e8b7 | 2030 | int *charbuf_base = charbuf; \ |
df7492f9 KH |
2031 | int components[MAX_COMPOSITION_COMPONENTS * 2 - 1]; \ |
2032 | int *buf = components; \ | |
2033 | int i, j; \ | |
4d41e8b7 | 2034 | \ |
df7492f9 | 2035 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ |
4d41e8b7 | 2036 | for (i = 1; i < MAX_COMPOSITION_COMPONENTS; i++) \ |
df7492f9 | 2037 | { \ |
4d41e8b7 KH |
2038 | if (*src < 0xA0) \ |
2039 | break; \ | |
781d7a48 | 2040 | DECODE_EMACS_MULE_COMPOSITION_RULE_20 (buf); \ |
df7492f9 KH |
2041 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ |
2042 | } \ | |
4d41e8b7 | 2043 | if (i <= 1 || (buf - components) % 2 == 0) \ |
df7492f9 | 2044 | goto invalid_code; \ |
4d41e8b7 | 2045 | if (charbuf + i + (i / 2) + 1 >= charbuf_end) \ |
df7492f9 | 2046 | goto no_more_source; \ |
4d41e8b7 KH |
2047 | ADD_COMPOSITION_DATA (charbuf, i, method); \ |
2048 | i = i * 2 - 1; \ | |
df7492f9 KH |
2049 | for (j = 0; j < i; j++) \ |
2050 | *charbuf++ = components[j]; \ | |
4d41e8b7 | 2051 | charbuf_base[0] -= i; \ |
df7492f9 KH |
2052 | for (j = 0; j < i; j += 2) \ |
2053 | *charbuf++ = components[j]; \ | |
2054 | } while (0) | |
2055 | ||
aa72b389 KH |
2056 | |
2057 | static void | |
df7492f9 | 2058 | decode_coding_emacs_mule (coding) |
aa72b389 | 2059 | struct coding_system *coding; |
aa72b389 | 2060 | { |
8f924df7 KH |
2061 | const unsigned char *src = coding->source + coding->consumed; |
2062 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
2063 | const unsigned char *src_base; | |
69a80ea3 KH |
2064 | int *charbuf = coding->charbuf + coding->charbuf_used; |
2065 | int *charbuf_end | |
2066 | = coding->charbuf + coding->charbuf_size - MAX_ANNOTATION_LENGTH; | |
df7492f9 | 2067 | int consumed_chars = 0, consumed_chars_base; |
df7492f9 | 2068 | int multibytep = coding->src_multibyte; |
24a73b0a | 2069 | Lisp_Object attrs, charset_list; |
ff0dacd7 KH |
2070 | int char_offset = coding->produced_char; |
2071 | int last_offset = char_offset; | |
2072 | int last_id = charset_ascii; | |
aa72b389 | 2073 | |
24a73b0a | 2074 | CODING_GET_INFO (coding, attrs, charset_list); |
aa72b389 | 2075 | |
aa72b389 KH |
2076 | while (1) |
2077 | { | |
df7492f9 KH |
2078 | int c; |
2079 | ||
aa72b389 | 2080 | src_base = src; |
df7492f9 KH |
2081 | consumed_chars_base = consumed_chars; |
2082 | ||
2083 | if (charbuf >= charbuf_end) | |
2084 | break; | |
aa72b389 | 2085 | |
df7492f9 | 2086 | ONE_MORE_BYTE (c); |
065e3595 KH |
2087 | if (c < 0) |
2088 | { | |
2089 | *charbuf++ = -c; | |
2090 | char_offset++; | |
2091 | } | |
2092 | else if (c < 0x80) | |
aa72b389 | 2093 | { |
df7492f9 KH |
2094 | *charbuf++ = c; |
2095 | char_offset++; | |
aa72b389 | 2096 | } |
df7492f9 KH |
2097 | else if (c == 0x80) |
2098 | { | |
df7492f9 | 2099 | ONE_MORE_BYTE (c); |
065e3595 KH |
2100 | if (c < 0) |
2101 | goto invalid_code; | |
781d7a48 KH |
2102 | if (c - 0xF2 >= COMPOSITION_RELATIVE |
2103 | && c - 0xF2 <= COMPOSITION_WITH_RULE_ALTCHARS) | |
df7492f9 KH |
2104 | DECODE_EMACS_MULE_21_COMPOSITION (c); |
2105 | else if (c < 0xC0) | |
2106 | DECODE_EMACS_MULE_20_RELATIVE_COMPOSITION (c); | |
2107 | else if (c == 0xFF) | |
2108 | DECODE_EMACS_MULE_20_RULEBASE_COMPOSITION (c); | |
2109 | else | |
2110 | goto invalid_code; | |
2111 | } | |
2112 | else if (c < 0xA0 && emacs_mule_bytes[c] > 1) | |
2113 | { | |
2114 | int nbytes, nchars; | |
ff0dacd7 KH |
2115 | int id; |
2116 | ||
781d7a48 KH |
2117 | src = src_base; |
2118 | consumed_chars = consumed_chars_base; | |
ff0dacd7 | 2119 | c = emacs_mule_char (coding, src, &nbytes, &nchars, &id); |
df7492f9 KH |
2120 | if (c < 0) |
2121 | { | |
2122 | if (c == -2) | |
2123 | break; | |
2124 | goto invalid_code; | |
2125 | } | |
ff0dacd7 KH |
2126 | if (last_id != id) |
2127 | { | |
2128 | if (last_id != charset_ascii) | |
69a80ea3 | 2129 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
ff0dacd7 KH |
2130 | last_id = id; |
2131 | last_offset = char_offset; | |
2132 | } | |
df7492f9 | 2133 | *charbuf++ = c; |
781d7a48 KH |
2134 | src += nbytes; |
2135 | consumed_chars += nchars; | |
df7492f9 KH |
2136 | char_offset++; |
2137 | } | |
4d41e8b7 KH |
2138 | else |
2139 | goto invalid_code; | |
df7492f9 KH |
2140 | continue; |
2141 | ||
2142 | invalid_code: | |
2143 | src = src_base; | |
2144 | consumed_chars = consumed_chars_base; | |
2145 | ONE_MORE_BYTE (c); | |
2146 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
ff0dacd7 | 2147 | char_offset++; |
df7492f9 KH |
2148 | coding->errors++; |
2149 | } | |
2150 | ||
2151 | no_more_source: | |
ff0dacd7 | 2152 | if (last_id != charset_ascii) |
69a80ea3 | 2153 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
df7492f9 KH |
2154 | coding->consumed_char += consumed_chars_base; |
2155 | coding->consumed = src_base - coding->source; | |
2156 | coding->charbuf_used = charbuf - coding->charbuf; | |
2157 | } | |
2158 | ||
2159 | ||
2160 | #define EMACS_MULE_LEADING_CODES(id, codes) \ | |
2161 | do { \ | |
2162 | if (id < 0xA0) \ | |
2163 | codes[0] = id, codes[1] = 0; \ | |
2164 | else if (id < 0xE0) \ | |
2165 | codes[0] = 0x9A, codes[1] = id; \ | |
2166 | else if (id < 0xF0) \ | |
2167 | codes[0] = 0x9B, codes[1] = id; \ | |
2168 | else if (id < 0xF5) \ | |
2169 | codes[0] = 0x9C, codes[1] = id; \ | |
2170 | else \ | |
2171 | codes[0] = 0x9D, codes[1] = id; \ | |
2172 | } while (0); | |
2173 | ||
aa72b389 | 2174 | |
df7492f9 KH |
2175 | static int |
2176 | encode_coding_emacs_mule (coding) | |
2177 | struct coding_system *coding; | |
2178 | { | |
2179 | int multibytep = coding->dst_multibyte; | |
2180 | int *charbuf = coding->charbuf; | |
2181 | int *charbuf_end = charbuf + coding->charbuf_used; | |
2182 | unsigned char *dst = coding->destination + coding->produced; | |
2183 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
2184 | int safe_room = 8; | |
df7492f9 | 2185 | int produced_chars = 0; |
24a73b0a | 2186 | Lisp_Object attrs, charset_list; |
df7492f9 | 2187 | int c; |
ff0dacd7 | 2188 | int preferred_charset_id = -1; |
df7492f9 | 2189 | |
24a73b0a | 2190 | CODING_GET_INFO (coding, attrs, charset_list); |
eccb6815 KH |
2191 | if (! EQ (charset_list, Vemacs_mule_charset_list)) |
2192 | { | |
2193 | CODING_ATTR_CHARSET_LIST (attrs) | |
2194 | = charset_list = Vemacs_mule_charset_list; | |
2195 | } | |
df7492f9 KH |
2196 | |
2197 | while (charbuf < charbuf_end) | |
2198 | { | |
2199 | ASSURE_DESTINATION (safe_room); | |
2200 | c = *charbuf++; | |
ff0dacd7 KH |
2201 | |
2202 | if (c < 0) | |
2203 | { | |
2204 | /* Handle an annotation. */ | |
2205 | switch (*charbuf) | |
2206 | { | |
2207 | case CODING_ANNOTATE_COMPOSITION_MASK: | |
2208 | /* Not yet implemented. */ | |
2209 | break; | |
2210 | case CODING_ANNOTATE_CHARSET_MASK: | |
2211 | preferred_charset_id = charbuf[3]; | |
2212 | if (preferred_charset_id >= 0 | |
2213 | && NILP (Fmemq (make_number (preferred_charset_id), | |
2214 | charset_list))) | |
2215 | preferred_charset_id = -1; | |
2216 | break; | |
2217 | default: | |
2218 | abort (); | |
2219 | } | |
2220 | charbuf += -c - 1; | |
2221 | continue; | |
2222 | } | |
2223 | ||
df7492f9 KH |
2224 | if (ASCII_CHAR_P (c)) |
2225 | EMIT_ONE_ASCII_BYTE (c); | |
16eafb5d KH |
2226 | else if (CHAR_BYTE8_P (c)) |
2227 | { | |
2228 | c = CHAR_TO_BYTE8 (c); | |
2229 | EMIT_ONE_BYTE (c); | |
2230 | } | |
df7492f9 | 2231 | else |
aa72b389 | 2232 | { |
df7492f9 KH |
2233 | struct charset *charset; |
2234 | unsigned code; | |
2235 | int dimension; | |
2236 | int emacs_mule_id; | |
2237 | unsigned char leading_codes[2]; | |
2238 | ||
ff0dacd7 KH |
2239 | if (preferred_charset_id >= 0) |
2240 | { | |
2241 | charset = CHARSET_FROM_ID (preferred_charset_id); | |
2242 | if (! CHAR_CHARSET_P (c, charset)) | |
2243 | charset = char_charset (c, charset_list, NULL); | |
2244 | } | |
2245 | else | |
2246 | charset = char_charset (c, charset_list, &code); | |
df7492f9 KH |
2247 | if (! charset) |
2248 | { | |
2249 | c = coding->default_char; | |
2250 | if (ASCII_CHAR_P (c)) | |
2251 | { | |
2252 | EMIT_ONE_ASCII_BYTE (c); | |
2253 | continue; | |
2254 | } | |
2255 | charset = char_charset (c, charset_list, &code); | |
2256 | } | |
2257 | dimension = CHARSET_DIMENSION (charset); | |
2258 | emacs_mule_id = CHARSET_EMACS_MULE_ID (charset); | |
2259 | EMACS_MULE_LEADING_CODES (emacs_mule_id, leading_codes); | |
2260 | EMIT_ONE_BYTE (leading_codes[0]); | |
2261 | if (leading_codes[1]) | |
2262 | EMIT_ONE_BYTE (leading_codes[1]); | |
2263 | if (dimension == 1) | |
1fa663f9 | 2264 | EMIT_ONE_BYTE (code | 0x80); |
aa72b389 | 2265 | else |
df7492f9 | 2266 | { |
1fa663f9 | 2267 | code |= 0x8080; |
df7492f9 KH |
2268 | EMIT_ONE_BYTE (code >> 8); |
2269 | EMIT_ONE_BYTE (code & 0xFF); | |
2270 | } | |
aa72b389 | 2271 | } |
aa72b389 | 2272 | } |
065e3595 | 2273 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
2274 | coding->produced_char += produced_chars; |
2275 | coding->produced = dst - coding->destination; | |
2276 | return 0; | |
aa72b389 | 2277 | } |
b73bfc1c | 2278 | |
4ed46869 | 2279 | \f |
df7492f9 | 2280 | /*** 7. ISO2022 handlers ***/ |
4ed46869 KH |
2281 | |
2282 | /* The following note describes the coding system ISO2022 briefly. | |
39787efd | 2283 | Since the intention of this note is to help understand the |
5a936b46 | 2284 | functions in this file, some parts are NOT ACCURATE or are OVERLY |
39787efd | 2285 | SIMPLIFIED. For thorough understanding, please refer to the |
5a936b46 | 2286 | original document of ISO2022. This is equivalent to the standard |
cfb43547 | 2287 | ECMA-35, obtainable from <URL:http://www.ecma.ch/> (*). |
4ed46869 KH |
2288 | |
2289 | ISO2022 provides many mechanisms to encode several character sets | |
cfb43547 | 2290 | in 7-bit and 8-bit environments. For 7-bit environments, all text |
39787efd KH |
2291 | is encoded using bytes less than 128. This may make the encoded |
2292 | text a little bit longer, but the text passes more easily through | |
cfb43547 | 2293 | several types of gateway, some of which strip off the MSB (Most |
8ca3766a | 2294 | Significant Bit). |
b73bfc1c | 2295 | |
cfb43547 DL |
2296 | There are two kinds of character sets: control character sets and |
2297 | graphic character sets. The former contain control characters such | |
4ed46869 | 2298 | as `newline' and `escape' to provide control functions (control |
39787efd | 2299 | functions are also provided by escape sequences). The latter |
cfb43547 | 2300 | contain graphic characters such as 'A' and '-'. Emacs recognizes |
4ed46869 KH |
2301 | two control character sets and many graphic character sets. |
2302 | ||
2303 | Graphic character sets are classified into one of the following | |
39787efd KH |
2304 | four classes, according to the number of bytes (DIMENSION) and |
2305 | number of characters in one dimension (CHARS) of the set: | |
2306 | - DIMENSION1_CHARS94 | |
2307 | - DIMENSION1_CHARS96 | |
2308 | - DIMENSION2_CHARS94 | |
2309 | - DIMENSION2_CHARS96 | |
2310 | ||
2311 | In addition, each character set is assigned an identification tag, | |
cfb43547 | 2312 | unique for each set, called the "final character" (denoted as <F> |
39787efd KH |
2313 | hereafter). The <F> of each character set is decided by ECMA(*) |
2314 | when it is registered in ISO. The code range of <F> is 0x30..0x7F | |
2315 | (0x30..0x3F are for private use only). | |
4ed46869 KH |
2316 | |
2317 | Note (*): ECMA = European Computer Manufacturers Association | |
2318 | ||
cfb43547 | 2319 | Here are examples of graphic character sets [NAME(<F>)]: |
4ed46869 KH |
2320 | o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ... |
2321 | o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ... | |
2322 | o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ... | |
2323 | o DIMENSION2_CHARS96 -- none for the moment | |
2324 | ||
39787efd | 2325 | A code area (1 byte=8 bits) is divided into 4 areas, C0, GL, C1, and GR. |
4ed46869 KH |
2326 | C0 [0x00..0x1F] -- control character plane 0 |
2327 | GL [0x20..0x7F] -- graphic character plane 0 | |
2328 | C1 [0x80..0x9F] -- control character plane 1 | |
2329 | GR [0xA0..0xFF] -- graphic character plane 1 | |
2330 | ||
2331 | A control character set is directly designated and invoked to C0 or | |
39787efd KH |
2332 | C1 by an escape sequence. The most common case is that: |
2333 | - ISO646's control character set is designated/invoked to C0, and | |
2334 | - ISO6429's control character set is designated/invoked to C1, | |
2335 | and usually these designations/invocations are omitted in encoded | |
2336 | text. In a 7-bit environment, only C0 can be used, and a control | |
2337 | character for C1 is encoded by an appropriate escape sequence to | |
2338 | fit into the environment. All control characters for C1 are | |
2339 | defined to have corresponding escape sequences. | |
4ed46869 KH |
2340 | |
2341 | A graphic character set is at first designated to one of four | |
2342 | graphic registers (G0 through G3), then these graphic registers are | |
2343 | invoked to GL or GR. These designations and invocations can be | |
2344 | done independently. The most common case is that G0 is invoked to | |
39787efd KH |
2345 | GL, G1 is invoked to GR, and ASCII is designated to G0. Usually |
2346 | these invocations and designations are omitted in encoded text. | |
2347 | In a 7-bit environment, only GL can be used. | |
4ed46869 | 2348 | |
39787efd KH |
2349 | When a graphic character set of CHARS94 is invoked to GL, codes |
2350 | 0x20 and 0x7F of the GL area work as control characters SPACE and | |
2351 | DEL respectively, and codes 0xA0 and 0xFF of the GR area should not | |
2352 | be used. | |
4ed46869 KH |
2353 | |
2354 | There are two ways of invocation: locking-shift and single-shift. | |
2355 | With locking-shift, the invocation lasts until the next different | |
39787efd KH |
2356 | invocation, whereas with single-shift, the invocation affects the |
2357 | following character only and doesn't affect the locking-shift | |
2358 | state. Invocations are done by the following control characters or | |
2359 | escape sequences: | |
4ed46869 KH |
2360 | |
2361 | ---------------------------------------------------------------------- | |
39787efd | 2362 | abbrev function cntrl escape seq description |
4ed46869 | 2363 | ---------------------------------------------------------------------- |
39787efd KH |
2364 | SI/LS0 (shift-in) 0x0F none invoke G0 into GL |
2365 | SO/LS1 (shift-out) 0x0E none invoke G1 into GL | |
2366 | LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL | |
2367 | LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL | |
2368 | LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*) | |
2369 | LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*) | |
2370 | LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*) | |
2371 | SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char | |
2372 | SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char | |
4ed46869 | 2373 | ---------------------------------------------------------------------- |
39787efd KH |
2374 | (*) These are not used by any known coding system. |
2375 | ||
2376 | Control characters for these functions are defined by macros | |
2377 | ISO_CODE_XXX in `coding.h'. | |
4ed46869 | 2378 | |
39787efd | 2379 | Designations are done by the following escape sequences: |
4ed46869 KH |
2380 | ---------------------------------------------------------------------- |
2381 | escape sequence description | |
2382 | ---------------------------------------------------------------------- | |
2383 | ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0 | |
2384 | ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1 | |
2385 | ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2 | |
2386 | ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3 | |
2387 | ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*) | |
2388 | ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1 | |
2389 | ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2 | |
2390 | ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3 | |
2391 | ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**) | |
2392 | ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1 | |
2393 | ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2 | |
2394 | ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3 | |
2395 | ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*) | |
2396 | ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1 | |
2397 | ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2 | |
2398 | ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3 | |
2399 | ---------------------------------------------------------------------- | |
2400 | ||
2401 | In this list, "DIMENSION1_CHARS94<F>" means a graphic character set | |
39787efd | 2402 | of dimension 1, chars 94, and final character <F>, etc... |
4ed46869 KH |
2403 | |
2404 | Note (*): Although these designations are not allowed in ISO2022, | |
2405 | Emacs accepts them on decoding, and produces them on encoding | |
39787efd | 2406 | CHARS96 character sets in a coding system which is characterized as |
4ed46869 KH |
2407 | 7-bit environment, non-locking-shift, and non-single-shift. |
2408 | ||
2409 | Note (**): If <F> is '@', 'A', or 'B', the intermediate character | |
df7492f9 | 2410 | '(' must be omitted. We refer to this as "short-form" hereafter. |
4ed46869 | 2411 | |
cfb43547 | 2412 | Now you may notice that there are a lot of ways of encoding the |
39787efd KH |
2413 | same multilingual text in ISO2022. Actually, there exist many |
2414 | coding systems such as Compound Text (used in X11's inter client | |
8ca3766a DL |
2415 | communication, ISO-2022-JP (used in Japanese Internet), ISO-2022-KR |
2416 | (used in Korean Internet), EUC (Extended UNIX Code, used in Asian | |
4ed46869 KH |
2417 | localized platforms), and all of these are variants of ISO2022. |
2418 | ||
2419 | In addition to the above, Emacs handles two more kinds of escape | |
2420 | sequences: ISO6429's direction specification and Emacs' private | |
2421 | sequence for specifying character composition. | |
2422 | ||
39787efd | 2423 | ISO6429's direction specification takes the following form: |
4ed46869 KH |
2424 | o CSI ']' -- end of the current direction |
2425 | o CSI '0' ']' -- end of the current direction | |
2426 | o CSI '1' ']' -- start of left-to-right text | |
2427 | o CSI '2' ']' -- start of right-to-left text | |
2428 | The control character CSI (0x9B: control sequence introducer) is | |
39787efd KH |
2429 | abbreviated to the escape sequence ESC '[' in a 7-bit environment. |
2430 | ||
2431 | Character composition specification takes the following form: | |
ec6d2bb8 KH |
2432 | o ESC '0' -- start relative composition |
2433 | o ESC '1' -- end composition | |
2434 | o ESC '2' -- start rule-base composition (*) | |
2435 | o ESC '3' -- start relative composition with alternate chars (**) | |
2436 | o ESC '4' -- start rule-base composition with alternate chars (**) | |
b73bfc1c | 2437 | Since these are not standard escape sequences of any ISO standard, |
cfb43547 | 2438 | the use of them with these meanings is restricted to Emacs only. |
ec6d2bb8 | 2439 | |
5a936b46 DL |
2440 | (*) This form is used only in Emacs 20.7 and older versions, |
2441 | but newer versions can safely decode it. | |
cfb43547 | 2442 | (**) This form is used only in Emacs 21.1 and newer versions, |
5a936b46 | 2443 | and older versions can't decode it. |
ec6d2bb8 | 2444 | |
cfb43547 | 2445 | Here's a list of example usages of these composition escape |
b73bfc1c | 2446 | sequences (categorized by `enum composition_method'). |
ec6d2bb8 | 2447 | |
b73bfc1c | 2448 | COMPOSITION_RELATIVE: |
ec6d2bb8 | 2449 | ESC 0 CHAR [ CHAR ] ESC 1 |
8ca3766a | 2450 | COMPOSITION_WITH_RULE: |
ec6d2bb8 | 2451 | ESC 2 CHAR [ RULE CHAR ] ESC 1 |
b73bfc1c | 2452 | COMPOSITION_WITH_ALTCHARS: |
ec6d2bb8 | 2453 | ESC 3 ALTCHAR [ ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 |
b73bfc1c | 2454 | COMPOSITION_WITH_RULE_ALTCHARS: |
ec6d2bb8 | 2455 | ESC 4 ALTCHAR [ RULE ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 */ |
4ed46869 KH |
2456 | |
2457 | enum iso_code_class_type iso_code_class[256]; | |
2458 | ||
df7492f9 KH |
2459 | #define SAFE_CHARSET_P(coding, id) \ |
2460 | ((id) <= (coding)->max_charset_id \ | |
2461 | && (coding)->safe_charsets[id] >= 0) | |
2462 | ||
2463 | ||
2464 | #define SHIFT_OUT_OK(category) \ | |
2465 | (CODING_ISO_INITIAL (&coding_categories[category], 1) >= 0) | |
2466 | ||
2467 | static void | |
f0064e1f DL |
2468 | setup_iso_safe_charsets (attrs) |
2469 | Lisp_Object attrs; | |
df7492f9 KH |
2470 | { |
2471 | Lisp_Object charset_list, safe_charsets; | |
2472 | Lisp_Object request; | |
2473 | Lisp_Object reg_usage; | |
2474 | Lisp_Object tail; | |
2475 | int reg94, reg96; | |
2476 | int flags = XINT (AREF (attrs, coding_attr_iso_flags)); | |
2477 | int max_charset_id; | |
2478 | ||
2479 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
2480 | if ((flags & CODING_ISO_FLAG_FULL_SUPPORT) | |
2481 | && ! EQ (charset_list, Viso_2022_charset_list)) | |
2482 | { | |
2483 | CODING_ATTR_CHARSET_LIST (attrs) | |
2484 | = charset_list = Viso_2022_charset_list; | |
2485 | ASET (attrs, coding_attr_safe_charsets, Qnil); | |
2486 | } | |
2487 | ||
2488 | if (STRINGP (AREF (attrs, coding_attr_safe_charsets))) | |
2489 | return; | |
2490 | ||
2491 | max_charset_id = 0; | |
2492 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
2493 | { | |
2494 | int id = XINT (XCAR (tail)); | |
2495 | if (max_charset_id < id) | |
2496 | max_charset_id = id; | |
2497 | } | |
d46c5b12 | 2498 | |
df7492f9 KH |
2499 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), |
2500 | make_number (255)); | |
2501 | request = AREF (attrs, coding_attr_iso_request); | |
2502 | reg_usage = AREF (attrs, coding_attr_iso_usage); | |
2503 | reg94 = XINT (XCAR (reg_usage)); | |
2504 | reg96 = XINT (XCDR (reg_usage)); | |
2505 | ||
2506 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
2507 | { | |
2508 | Lisp_Object id; | |
2509 | Lisp_Object reg; | |
2510 | struct charset *charset; | |
2511 | ||
2512 | id = XCAR (tail); | |
2513 | charset = CHARSET_FROM_ID (XINT (id)); | |
bf16eb23 | 2514 | reg = Fcdr (Fassq (id, request)); |
df7492f9 | 2515 | if (! NILP (reg)) |
8f924df7 | 2516 | SSET (safe_charsets, XINT (id), XINT (reg)); |
df7492f9 KH |
2517 | else if (charset->iso_chars_96) |
2518 | { | |
2519 | if (reg96 < 4) | |
8f924df7 | 2520 | SSET (safe_charsets, XINT (id), reg96); |
df7492f9 KH |
2521 | } |
2522 | else | |
2523 | { | |
2524 | if (reg94 < 4) | |
8f924df7 | 2525 | SSET (safe_charsets, XINT (id), reg94); |
df7492f9 KH |
2526 | } |
2527 | } | |
2528 | ASET (attrs, coding_attr_safe_charsets, safe_charsets); | |
2529 | } | |
d46c5b12 | 2530 | |
b6871cc7 | 2531 | |
4ed46869 | 2532 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
ff0dacd7 KH |
2533 | Check if a text is encoded in one of ISO-2022 based codig systems. |
2534 | If it is, return 1, else return 0. */ | |
4ed46869 | 2535 | |
0a28aafb | 2536 | static int |
ff0dacd7 | 2537 | detect_coding_iso_2022 (coding, detect_info) |
df7492f9 | 2538 | struct coding_system *coding; |
ff0dacd7 | 2539 | struct coding_detection_info *detect_info; |
4ed46869 | 2540 | { |
8f924df7 KH |
2541 | const unsigned char *src = coding->source, *src_base = src; |
2542 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
df7492f9 | 2543 | int multibytep = coding->src_multibyte; |
ff0dacd7 | 2544 | int single_shifting = 0; |
df7492f9 KH |
2545 | int id; |
2546 | int c, c1; | |
2547 | int consumed_chars = 0; | |
2548 | int i; | |
ff0dacd7 KH |
2549 | int rejected = 0; |
2550 | int found = 0; | |
2551 | ||
2552 | detect_info->checked |= CATEGORY_MASK_ISO; | |
df7492f9 KH |
2553 | |
2554 | for (i = coding_category_iso_7; i <= coding_category_iso_8_else; i++) | |
2555 | { | |
2556 | struct coding_system *this = &(coding_categories[i]); | |
2557 | Lisp_Object attrs, val; | |
2558 | ||
2559 | attrs = CODING_ID_ATTRS (this->id); | |
2560 | if (CODING_ISO_FLAGS (this) & CODING_ISO_FLAG_FULL_SUPPORT | |
2561 | && ! EQ (CODING_ATTR_SAFE_CHARSETS (attrs), Viso_2022_charset_list)) | |
2562 | setup_iso_safe_charsets (attrs); | |
2563 | val = CODING_ATTR_SAFE_CHARSETS (attrs); | |
8f924df7 KH |
2564 | this->max_charset_id = SCHARS (val) - 1; |
2565 | this->safe_charsets = (char *) SDATA (val); | |
df7492f9 KH |
2566 | } |
2567 | ||
2568 | /* A coding system of this category is always ASCII compatible. */ | |
2569 | src += coding->head_ascii; | |
3f003981 | 2570 | |
ff0dacd7 | 2571 | while (rejected != CATEGORY_MASK_ISO) |
4ed46869 | 2572 | { |
065e3595 | 2573 | src_base = src; |
df7492f9 | 2574 | ONE_MORE_BYTE (c); |
4ed46869 KH |
2575 | switch (c) |
2576 | { | |
2577 | case ISO_CODE_ESC: | |
74383408 KH |
2578 | if (inhibit_iso_escape_detection) |
2579 | break; | |
f46869e4 | 2580 | single_shifting = 0; |
df7492f9 | 2581 | ONE_MORE_BYTE (c); |
d46c5b12 | 2582 | if (c >= '(' && c <= '/') |
4ed46869 | 2583 | { |
bf9cdd4e | 2584 | /* Designation sequence for a charset of dimension 1. */ |
df7492f9 | 2585 | ONE_MORE_BYTE (c1); |
d46c5b12 | 2586 | if (c1 < ' ' || c1 >= 0x80 |
df7492f9 | 2587 | || (id = iso_charset_table[0][c >= ','][c1]) < 0) |
d46c5b12 KH |
2588 | /* Invalid designation sequence. Just ignore. */ |
2589 | break; | |
bf9cdd4e KH |
2590 | } |
2591 | else if (c == '$') | |
2592 | { | |
2593 | /* Designation sequence for a charset of dimension 2. */ | |
df7492f9 | 2594 | ONE_MORE_BYTE (c); |
bf9cdd4e KH |
2595 | if (c >= '@' && c <= 'B') |
2596 | /* Designation for JISX0208.1978, GB2312, or JISX0208. */ | |
ff0dacd7 | 2597 | id = iso_charset_table[1][0][c]; |
bf9cdd4e | 2598 | else if (c >= '(' && c <= '/') |
bcf26d6a | 2599 | { |
df7492f9 | 2600 | ONE_MORE_BYTE (c1); |
d46c5b12 | 2601 | if (c1 < ' ' || c1 >= 0x80 |
df7492f9 | 2602 | || (id = iso_charset_table[1][c >= ','][c1]) < 0) |
d46c5b12 KH |
2603 | /* Invalid designation sequence. Just ignore. */ |
2604 | break; | |
bcf26d6a | 2605 | } |
bf9cdd4e | 2606 | else |
ff0dacd7 | 2607 | /* Invalid designation sequence. Just ignore it. */ |
d46c5b12 KH |
2608 | break; |
2609 | } | |
ae9ff118 | 2610 | else if (c == 'N' || c == 'O') |
d46c5b12 | 2611 | { |
ae9ff118 | 2612 | /* ESC <Fe> for SS2 or SS3. */ |
ff0dacd7 KH |
2613 | single_shifting = 1; |
2614 | rejected |= CATEGORY_MASK_ISO_7BIT | CATEGORY_MASK_ISO_8BIT; | |
d46c5b12 | 2615 | break; |
4ed46869 | 2616 | } |
ec6d2bb8 KH |
2617 | else if (c >= '0' && c <= '4') |
2618 | { | |
2619 | /* ESC <Fp> for start/end composition. */ | |
ff0dacd7 | 2620 | found |= CATEGORY_MASK_ISO; |
ec6d2bb8 KH |
2621 | break; |
2622 | } | |
bf9cdd4e | 2623 | else |
df7492f9 | 2624 | { |
ff0dacd7 | 2625 | /* Invalid escape sequence. Just ignore it. */ |
df7492f9 KH |
2626 | break; |
2627 | } | |
d46c5b12 KH |
2628 | |
2629 | /* We found a valid designation sequence for CHARSET. */ | |
ff0dacd7 | 2630 | rejected |= CATEGORY_MASK_ISO_8BIT; |
df7492f9 KH |
2631 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7], |
2632 | id)) | |
ff0dacd7 | 2633 | found |= CATEGORY_MASK_ISO_7; |
d46c5b12 | 2634 | else |
ff0dacd7 | 2635 | rejected |= CATEGORY_MASK_ISO_7; |
df7492f9 KH |
2636 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7_tight], |
2637 | id)) | |
ff0dacd7 | 2638 | found |= CATEGORY_MASK_ISO_7_TIGHT; |
d46c5b12 | 2639 | else |
ff0dacd7 | 2640 | rejected |= CATEGORY_MASK_ISO_7_TIGHT; |
df7492f9 KH |
2641 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7_else], |
2642 | id)) | |
ff0dacd7 | 2643 | found |= CATEGORY_MASK_ISO_7_ELSE; |
ae9ff118 | 2644 | else |
ff0dacd7 | 2645 | rejected |= CATEGORY_MASK_ISO_7_ELSE; |
df7492f9 KH |
2646 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_8_else], |
2647 | id)) | |
ff0dacd7 | 2648 | found |= CATEGORY_MASK_ISO_8_ELSE; |
ae9ff118 | 2649 | else |
ff0dacd7 | 2650 | rejected |= CATEGORY_MASK_ISO_8_ELSE; |
4ed46869 KH |
2651 | break; |
2652 | ||
4ed46869 | 2653 | case ISO_CODE_SO: |
d46c5b12 | 2654 | case ISO_CODE_SI: |
ff0dacd7 | 2655 | /* Locking shift out/in. */ |
74383408 KH |
2656 | if (inhibit_iso_escape_detection) |
2657 | break; | |
f46869e4 | 2658 | single_shifting = 0; |
ff0dacd7 | 2659 | rejected |= CATEGORY_MASK_ISO_7BIT | CATEGORY_MASK_ISO_8BIT; |
d46c5b12 KH |
2660 | break; |
2661 | ||
4ed46869 | 2662 | case ISO_CODE_CSI: |
ff0dacd7 | 2663 | /* Control sequence introducer. */ |
f46869e4 | 2664 | single_shifting = 0; |
ff0dacd7 KH |
2665 | rejected |= CATEGORY_MASK_ISO_7BIT | CATEGORY_MASK_ISO_7_ELSE; |
2666 | found |= CATEGORY_MASK_ISO_8_ELSE; | |
2667 | goto check_extra_latin; | |
2668 | ||
4ed46869 KH |
2669 | case ISO_CODE_SS2: |
2670 | case ISO_CODE_SS3: | |
ff0dacd7 KH |
2671 | /* Single shift. */ |
2672 | if (inhibit_iso_escape_detection) | |
2673 | break; | |
75e2a253 | 2674 | single_shifting = 0; |
ff0dacd7 KH |
2675 | rejected |= CATEGORY_MASK_ISO_7BIT; |
2676 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_1]) | |
2677 | & CODING_ISO_FLAG_SINGLE_SHIFT) | |
75e2a253 | 2678 | found |= CATEGORY_MASK_ISO_8_1, single_shifting = 1; |
ff0dacd7 KH |
2679 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_2]) |
2680 | & CODING_ISO_FLAG_SINGLE_SHIFT) | |
75e2a253 KH |
2681 | found |= CATEGORY_MASK_ISO_8_2, single_shifting = 1; |
2682 | if (single_shifting) | |
2683 | break; | |
ff0dacd7 | 2684 | goto check_extra_latin; |
4ed46869 KH |
2685 | |
2686 | default: | |
065e3595 KH |
2687 | if (c < 0) |
2688 | continue; | |
4ed46869 | 2689 | if (c < 0x80) |
f46869e4 KH |
2690 | { |
2691 | single_shifting = 0; | |
2692 | break; | |
2693 | } | |
ff0dacd7 | 2694 | if (c >= 0xA0) |
c4825358 | 2695 | { |
ff0dacd7 KH |
2696 | rejected |= CATEGORY_MASK_ISO_7BIT | CATEGORY_MASK_ISO_7_ELSE; |
2697 | found |= CATEGORY_MASK_ISO_8_1; | |
f46869e4 | 2698 | /* Check the length of succeeding codes of the range |
ff0dacd7 KH |
2699 | 0xA0..0FF. If the byte length is even, we include |
2700 | CATEGORY_MASK_ISO_8_2 in `found'. We can check this | |
2701 | only when we are not single shifting. */ | |
2702 | if (! single_shifting | |
2703 | && ! (rejected & CATEGORY_MASK_ISO_8_2)) | |
f46869e4 | 2704 | { |
e17de821 | 2705 | int i = 1; |
b73bfc1c KH |
2706 | while (src < src_end) |
2707 | { | |
df7492f9 | 2708 | ONE_MORE_BYTE (c); |
b73bfc1c KH |
2709 | if (c < 0xA0) |
2710 | break; | |
2711 | i++; | |
2712 | } | |
2713 | ||
2714 | if (i & 1 && src < src_end) | |
ff0dacd7 | 2715 | rejected |= CATEGORY_MASK_ISO_8_2; |
f46869e4 | 2716 | else |
ff0dacd7 | 2717 | found |= CATEGORY_MASK_ISO_8_2; |
f46869e4 | 2718 | } |
ff0dacd7 | 2719 | break; |
4ed46869 | 2720 | } |
ff0dacd7 KH |
2721 | check_extra_latin: |
2722 | single_shifting = 0; | |
2723 | if (! VECTORP (Vlatin_extra_code_table) | |
2724 | || NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
2725 | { | |
2726 | rejected = CATEGORY_MASK_ISO; | |
2727 | break; | |
2728 | } | |
2729 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_1]) | |
2730 | & CODING_ISO_FLAG_LATIN_EXTRA) | |
2731 | found |= CATEGORY_MASK_ISO_8_1; | |
2732 | else | |
2733 | rejected |= CATEGORY_MASK_ISO_8_1; | |
75e2a253 | 2734 | rejected |= CATEGORY_MASK_ISO_8_2; |
4ed46869 KH |
2735 | } |
2736 | } | |
ff0dacd7 KH |
2737 | detect_info->rejected |= CATEGORY_MASK_ISO; |
2738 | return 0; | |
4ed46869 | 2739 | |
df7492f9 | 2740 | no_more_source: |
ff0dacd7 KH |
2741 | detect_info->rejected |= rejected; |
2742 | detect_info->found |= (found & ~rejected); | |
df7492f9 | 2743 | return 1; |
4ed46869 | 2744 | } |
ec6d2bb8 | 2745 | |
4ed46869 | 2746 | |
134b9549 KH |
2747 | /* Set designation state into CODING. Set CHARS_96 to -1 if the |
2748 | escape sequence should be kept. */ | |
df7492f9 KH |
2749 | #define DECODE_DESIGNATION(reg, dim, chars_96, final) \ |
2750 | do { \ | |
2751 | int id, prev; \ | |
2752 | \ | |
2753 | if (final < '0' || final >= 128 \ | |
2754 | || ((id = ISO_CHARSET_TABLE (dim, chars_96, final)) < 0) \ | |
2755 | || !SAFE_CHARSET_P (coding, id)) \ | |
2756 | { \ | |
2757 | CODING_ISO_DESIGNATION (coding, reg) = -2; \ | |
134b9549 KH |
2758 | chars_96 = -1; \ |
2759 | break; \ | |
df7492f9 KH |
2760 | } \ |
2761 | prev = CODING_ISO_DESIGNATION (coding, reg); \ | |
bf16eb23 KH |
2762 | if (id == charset_jisx0201_roman) \ |
2763 | { \ | |
2764 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_ROMAN) \ | |
2765 | id = charset_ascii; \ | |
2766 | } \ | |
2767 | else if (id == charset_jisx0208_1978) \ | |
2768 | { \ | |
2769 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_OLDJIS) \ | |
2770 | id = charset_jisx0208; \ | |
2771 | } \ | |
df7492f9 KH |
2772 | CODING_ISO_DESIGNATION (coding, reg) = id; \ |
2773 | /* If there was an invalid designation to REG previously, and this \ | |
2774 | designation is ASCII to REG, we should keep this designation \ | |
2775 | sequence. */ \ | |
2776 | if (prev == -2 && id == charset_ascii) \ | |
134b9549 | 2777 | chars_96 = -1; \ |
4ed46869 KH |
2778 | } while (0) |
2779 | ||
d46c5b12 | 2780 | |
df7492f9 KH |
2781 | #define MAYBE_FINISH_COMPOSITION() \ |
2782 | do { \ | |
2783 | int i; \ | |
2784 | if (composition_state == COMPOSING_NO) \ | |
2785 | break; \ | |
2786 | /* It is assured that we have enough room for producing \ | |
2787 | characters stored in the table `components'. */ \ | |
2788 | if (charbuf + component_idx > charbuf_end) \ | |
2789 | goto no_more_source; \ | |
2790 | composition_state = COMPOSING_NO; \ | |
2791 | if (method == COMPOSITION_RELATIVE \ | |
2792 | || method == COMPOSITION_WITH_ALTCHARS) \ | |
2793 | { \ | |
2794 | for (i = 0; i < component_idx; i++) \ | |
2795 | *charbuf++ = components[i]; \ | |
2796 | char_offset += component_idx; \ | |
2797 | } \ | |
2798 | else \ | |
2799 | { \ | |
2800 | for (i = 0; i < component_idx; i += 2) \ | |
2801 | *charbuf++ = components[i]; \ | |
2802 | char_offset += (component_idx / 2) + 1; \ | |
2803 | } \ | |
2804 | } while (0) | |
2805 | ||
d46c5b12 | 2806 | |
aa72b389 KH |
2807 | /* Handle composition start sequence ESC 0, ESC 2, ESC 3, or ESC 4. |
2808 | ESC 0 : relative composition : ESC 0 CHAR ... ESC 1 | |
2809 | ESC 2 : rulebase composition : ESC 2 CHAR RULE CHAR RULE ... CHAR ESC 1 | |
df7492f9 KH |
2810 | ESC 3 : altchar composition : ESC 3 CHAR ... ESC 0 CHAR ... ESC 1 |
2811 | ESC 4 : alt&rule composition : ESC 4 CHAR RULE ... CHAR ESC 0 CHAR ... ESC 1 | |
aa72b389 | 2812 | */ |
ec6d2bb8 | 2813 | |
df7492f9 KH |
2814 | #define DECODE_COMPOSITION_START(c1) \ |
2815 | do { \ | |
2816 | if (c1 == '0' \ | |
781d7a48 | 2817 | && composition_state == COMPOSING_COMPONENT_RULE) \ |
df7492f9 KH |
2818 | { \ |
2819 | component_len = component_idx; \ | |
2820 | composition_state = COMPOSING_CHAR; \ | |
2821 | } \ | |
2822 | else \ | |
2823 | { \ | |
8f924df7 | 2824 | const unsigned char *p; \ |
df7492f9 KH |
2825 | \ |
2826 | MAYBE_FINISH_COMPOSITION (); \ | |
2827 | if (charbuf + MAX_COMPOSITION_COMPONENTS > charbuf_end) \ | |
2828 | goto no_more_source; \ | |
2829 | for (p = src; p < src_end - 1; p++) \ | |
2830 | if (*p == ISO_CODE_ESC && p[1] == '1') \ | |
2831 | break; \ | |
2832 | if (p == src_end - 1) \ | |
2833 | { \ | |
9286b333 KH |
2834 | /* The current composition doesn't end in the current \ |
2835 | source. */ \ | |
2836 | record_conversion_result \ | |
2837 | (coding, CODING_RESULT_INSUFFICIENT_SRC); \ | |
df7492f9 KH |
2838 | goto no_more_source; \ |
2839 | } \ | |
2840 | \ | |
2841 | /* This is surely the start of a composition. */ \ | |
2842 | method = (c1 == '0' ? COMPOSITION_RELATIVE \ | |
2843 | : c1 == '2' ? COMPOSITION_WITH_RULE \ | |
2844 | : c1 == '3' ? COMPOSITION_WITH_ALTCHARS \ | |
2845 | : COMPOSITION_WITH_RULE_ALTCHARS); \ | |
2846 | composition_state = (c1 <= '2' ? COMPOSING_CHAR \ | |
2847 | : COMPOSING_COMPONENT_CHAR); \ | |
2848 | component_idx = component_len = 0; \ | |
2849 | } \ | |
ec6d2bb8 KH |
2850 | } while (0) |
2851 | ||
ec6d2bb8 | 2852 | |
df7492f9 KH |
2853 | /* Handle compositoin end sequence ESC 1. */ |
2854 | ||
2855 | #define DECODE_COMPOSITION_END() \ | |
ec6d2bb8 | 2856 | do { \ |
df7492f9 KH |
2857 | int nchars = (component_len > 0 ? component_idx - component_len \ |
2858 | : method == COMPOSITION_RELATIVE ? component_idx \ | |
2859 | : (component_idx + 1) / 2); \ | |
2860 | int i; \ | |
2861 | int *saved_charbuf = charbuf; \ | |
2862 | \ | |
69a80ea3 | 2863 | ADD_COMPOSITION_DATA (charbuf, nchars, method); \ |
df7492f9 | 2864 | if (method != COMPOSITION_RELATIVE) \ |
ec6d2bb8 | 2865 | { \ |
df7492f9 KH |
2866 | if (component_len == 0) \ |
2867 | for (i = 0; i < component_idx; i++) \ | |
2868 | *charbuf++ = components[i]; \ | |
2869 | else \ | |
2870 | for (i = 0; i < component_len; i++) \ | |
2871 | *charbuf++ = components[i]; \ | |
2872 | *saved_charbuf = saved_charbuf - charbuf; \ | |
ec6d2bb8 | 2873 | } \ |
df7492f9 KH |
2874 | if (method == COMPOSITION_WITH_RULE) \ |
2875 | for (i = 0; i < component_idx; i += 2, char_offset++) \ | |
2876 | *charbuf++ = components[i]; \ | |
ec6d2bb8 | 2877 | else \ |
df7492f9 KH |
2878 | for (i = component_len; i < component_idx; i++, char_offset++) \ |
2879 | *charbuf++ = components[i]; \ | |
2880 | coding->annotated = 1; \ | |
2881 | composition_state = COMPOSING_NO; \ | |
ec6d2bb8 KH |
2882 | } while (0) |
2883 | ||
df7492f9 | 2884 | |
ec6d2bb8 KH |
2885 | /* Decode a composition rule from the byte C1 (and maybe one more byte |
2886 | from SRC) and store one encoded composition rule in | |
2887 | coding->cmp_data. */ | |
2888 | ||
2889 | #define DECODE_COMPOSITION_RULE(c1) \ | |
2890 | do { \ | |
ec6d2bb8 KH |
2891 | (c1) -= 32; \ |
2892 | if (c1 < 81) /* old format (before ver.21) */ \ | |
2893 | { \ | |
2894 | int gref = (c1) / 9; \ | |
2895 | int nref = (c1) % 9; \ | |
2896 | if (gref == 4) gref = 10; \ | |
2897 | if (nref == 4) nref = 10; \ | |
df7492f9 | 2898 | c1 = COMPOSITION_ENCODE_RULE (gref, nref); \ |
ec6d2bb8 | 2899 | } \ |
b73bfc1c | 2900 | else if (c1 < 93) /* new format (after ver.21) */ \ |
ec6d2bb8 KH |
2901 | { \ |
2902 | ONE_MORE_BYTE (c2); \ | |
df7492f9 | 2903 | c1 = COMPOSITION_ENCODE_RULE (c1 - 81, c2 - 32); \ |
ec6d2bb8 | 2904 | } \ |
df7492f9 KH |
2905 | else \ |
2906 | c1 = 0; \ | |
ec6d2bb8 | 2907 | } while (0) |
88993dfd | 2908 | |
d46c5b12 | 2909 | |
4ed46869 KH |
2910 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
2911 | ||
b73bfc1c | 2912 | static void |
df7492f9 | 2913 | decode_coding_iso_2022 (coding) |
4ed46869 | 2914 | struct coding_system *coding; |
4ed46869 | 2915 | { |
8f924df7 KH |
2916 | const unsigned char *src = coding->source + coding->consumed; |
2917 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
2918 | const unsigned char *src_base; | |
69a80ea3 | 2919 | int *charbuf = coding->charbuf + coding->charbuf_used; |
ff0dacd7 | 2920 | int *charbuf_end |
69a80ea3 | 2921 | = coding->charbuf + coding->charbuf_size - 4 - MAX_ANNOTATION_LENGTH; |
df7492f9 | 2922 | int consumed_chars = 0, consumed_chars_base; |
df7492f9 | 2923 | int multibytep = coding->src_multibyte; |
4ed46869 | 2924 | /* Charsets invoked to graphic plane 0 and 1 respectively. */ |
df7492f9 KH |
2925 | int charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); |
2926 | int charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
134b9549 | 2927 | int charset_id_2, charset_id_3; |
df7492f9 KH |
2928 | struct charset *charset; |
2929 | int c; | |
2930 | /* For handling composition sequence. */ | |
2931 | #define COMPOSING_NO 0 | |
2932 | #define COMPOSING_CHAR 1 | |
2933 | #define COMPOSING_RULE 2 | |
2934 | #define COMPOSING_COMPONENT_CHAR 3 | |
2935 | #define COMPOSING_COMPONENT_RULE 4 | |
2936 | ||
2937 | int composition_state = COMPOSING_NO; | |
2938 | enum composition_method method; | |
2939 | int components[MAX_COMPOSITION_COMPONENTS * 2 + 1]; | |
2940 | int component_idx; | |
2941 | int component_len; | |
24a73b0a | 2942 | Lisp_Object attrs, charset_list; |
ff0dacd7 KH |
2943 | int char_offset = coding->produced_char; |
2944 | int last_offset = char_offset; | |
2945 | int last_id = charset_ascii; | |
df7492f9 | 2946 | |
24a73b0a | 2947 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 | 2948 | setup_iso_safe_charsets (attrs); |
287c57d7 KH |
2949 | /* Charset list may have been changed. */ |
2950 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
2951 | coding->safe_charsets = (char *) SDATA (CODING_ATTR_SAFE_CHARSETS(attrs)); | |
b73bfc1c KH |
2952 | |
2953 | while (1) | |
4ed46869 | 2954 | { |
463f5630 | 2955 | int c1, c2; |
b73bfc1c KH |
2956 | |
2957 | src_base = src; | |
df7492f9 KH |
2958 | consumed_chars_base = consumed_chars; |
2959 | ||
2960 | if (charbuf >= charbuf_end) | |
2961 | break; | |
2962 | ||
b73bfc1c | 2963 | ONE_MORE_BYTE (c1); |
065e3595 KH |
2964 | if (c1 < 0) |
2965 | goto invalid_code; | |
4ed46869 | 2966 | |
98725083 | 2967 | /* We produce at most one character. */ |
4ed46869 KH |
2968 | switch (iso_code_class [c1]) |
2969 | { | |
2970 | case ISO_0x20_or_0x7F: | |
df7492f9 | 2971 | if (composition_state != COMPOSING_NO) |
ec6d2bb8 | 2972 | { |
df7492f9 KH |
2973 | if (composition_state == COMPOSING_RULE |
2974 | || composition_state == COMPOSING_COMPONENT_RULE) | |
2975 | { | |
2976 | DECODE_COMPOSITION_RULE (c1); | |
2977 | components[component_idx++] = c1; | |
2978 | composition_state--; | |
2979 | continue; | |
2980 | } | |
4ed46869 | 2981 | } |
df7492f9 KH |
2982 | if (charset_id_0 < 0 |
2983 | || ! CHARSET_ISO_CHARS_96 (CHARSET_FROM_ID (charset_id_0))) | |
781d7a48 KH |
2984 | /* This is SPACE or DEL. */ |
2985 | charset = CHARSET_FROM_ID (charset_ascii); | |
2986 | else | |
2987 | charset = CHARSET_FROM_ID (charset_id_0); | |
2988 | break; | |
4ed46869 KH |
2989 | |
2990 | case ISO_graphic_plane_0: | |
781d7a48 | 2991 | if (composition_state != COMPOSING_NO) |
b73bfc1c | 2992 | { |
781d7a48 KH |
2993 | if (composition_state == COMPOSING_RULE |
2994 | || composition_state == COMPOSING_COMPONENT_RULE) | |
2995 | { | |
2996 | DECODE_COMPOSITION_RULE (c1); | |
2997 | components[component_idx++] = c1; | |
2998 | composition_state--; | |
2999 | continue; | |
3000 | } | |
b73bfc1c | 3001 | } |
134b9549 KH |
3002 | if (charset_id_0 < 0) |
3003 | charset = CHARSET_FROM_ID (charset_ascii); | |
3004 | else | |
3005 | charset = CHARSET_FROM_ID (charset_id_0); | |
4ed46869 KH |
3006 | break; |
3007 | ||
3008 | case ISO_0xA0_or_0xFF: | |
df7492f9 KH |
3009 | if (charset_id_1 < 0 |
3010 | || ! CHARSET_ISO_CHARS_96 (CHARSET_FROM_ID (charset_id_1)) | |
3011 | || CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) | |
3012 | goto invalid_code; | |
4ed46869 KH |
3013 | /* This is a graphic character, we fall down ... */ |
3014 | ||
3015 | case ISO_graphic_plane_1: | |
df7492f9 KH |
3016 | if (charset_id_1 < 0) |
3017 | goto invalid_code; | |
3018 | charset = CHARSET_FROM_ID (charset_id_1); | |
4ed46869 KH |
3019 | break; |
3020 | ||
df7492f9 KH |
3021 | case ISO_control_0: |
3022 | MAYBE_FINISH_COMPOSITION (); | |
3023 | charset = CHARSET_FROM_ID (charset_ascii); | |
4ed46869 KH |
3024 | break; |
3025 | ||
df7492f9 KH |
3026 | case ISO_control_1: |
3027 | MAYBE_FINISH_COMPOSITION (); | |
3028 | goto invalid_code; | |
3029 | ||
4ed46869 | 3030 | case ISO_shift_out: |
df7492f9 KH |
3031 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
3032 | || CODING_ISO_DESIGNATION (coding, 1) < 0) | |
3033 | goto invalid_code; | |
3034 | CODING_ISO_INVOCATION (coding, 0) = 1; | |
3035 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 3036 | continue; |
4ed46869 KH |
3037 | |
3038 | case ISO_shift_in: | |
df7492f9 KH |
3039 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT)) |
3040 | goto invalid_code; | |
3041 | CODING_ISO_INVOCATION (coding, 0) = 0; | |
3042 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 3043 | continue; |
4ed46869 KH |
3044 | |
3045 | case ISO_single_shift_2_7: | |
3046 | case ISO_single_shift_2: | |
df7492f9 KH |
3047 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT)) |
3048 | goto invalid_code; | |
4ed46869 KH |
3049 | /* SS2 is handled as an escape sequence of ESC 'N' */ |
3050 | c1 = 'N'; | |
3051 | goto label_escape_sequence; | |
3052 | ||
3053 | case ISO_single_shift_3: | |
df7492f9 KH |
3054 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT)) |
3055 | goto invalid_code; | |
4ed46869 KH |
3056 | /* SS2 is handled as an escape sequence of ESC 'O' */ |
3057 | c1 = 'O'; | |
3058 | goto label_escape_sequence; | |
3059 | ||
3060 | case ISO_control_sequence_introducer: | |
3061 | /* CSI is handled as an escape sequence of ESC '[' ... */ | |
3062 | c1 = '['; | |
3063 | goto label_escape_sequence; | |
3064 | ||
3065 | case ISO_escape: | |
3066 | ONE_MORE_BYTE (c1); | |
3067 | label_escape_sequence: | |
df7492f9 | 3068 | /* Escape sequences handled here are invocation, |
4ed46869 KH |
3069 | designation, direction specification, and character |
3070 | composition specification. */ | |
3071 | switch (c1) | |
3072 | { | |
3073 | case '&': /* revision of following character set */ | |
3074 | ONE_MORE_BYTE (c1); | |
3075 | if (!(c1 >= '@' && c1 <= '~')) | |
df7492f9 | 3076 | goto invalid_code; |
4ed46869 KH |
3077 | ONE_MORE_BYTE (c1); |
3078 | if (c1 != ISO_CODE_ESC) | |
df7492f9 | 3079 | goto invalid_code; |
4ed46869 KH |
3080 | ONE_MORE_BYTE (c1); |
3081 | goto label_escape_sequence; | |
3082 | ||
3083 | case '$': /* designation of 2-byte character set */ | |
df7492f9 KH |
3084 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATION)) |
3085 | goto invalid_code; | |
134b9549 KH |
3086 | { |
3087 | int reg, chars96; | |
3088 | ||
3089 | ONE_MORE_BYTE (c1); | |
3090 | if (c1 >= '@' && c1 <= 'B') | |
3091 | { /* designation of JISX0208.1978, GB2312.1980, | |
88993dfd | 3092 | or JISX0208.1980 */ |
134b9549 KH |
3093 | reg = 0, chars96 = 0; |
3094 | } | |
3095 | else if (c1 >= 0x28 && c1 <= 0x2B) | |
3096 | { /* designation of DIMENSION2_CHARS94 character set */ | |
3097 | reg = c1 - 0x28, chars96 = 0; | |
3098 | ONE_MORE_BYTE (c1); | |
3099 | } | |
3100 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
3101 | { /* designation of DIMENSION2_CHARS96 character set */ | |
3102 | reg = c1 - 0x2C, chars96 = 1; | |
3103 | ONE_MORE_BYTE (c1); | |
3104 | } | |
3105 | else | |
3106 | goto invalid_code; | |
3107 | DECODE_DESIGNATION (reg, 2, chars96, c1); | |
3108 | /* We must update these variables now. */ | |
3109 | if (reg == 0) | |
3110 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
3111 | else if (reg == 1) | |
3112 | charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
3113 | if (chars96 < 0) | |
3114 | goto invalid_code; | |
3115 | } | |
b73bfc1c | 3116 | continue; |
4ed46869 KH |
3117 | |
3118 | case 'n': /* invocation of locking-shift-2 */ | |
df7492f9 KH |
3119 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
3120 | || CODING_ISO_DESIGNATION (coding, 2) < 0) | |
3121 | goto invalid_code; | |
3122 | CODING_ISO_INVOCATION (coding, 0) = 2; | |
3123 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 3124 | continue; |
4ed46869 KH |
3125 | |
3126 | case 'o': /* invocation of locking-shift-3 */ | |
df7492f9 KH |
3127 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
3128 | || CODING_ISO_DESIGNATION (coding, 3) < 0) | |
3129 | goto invalid_code; | |
3130 | CODING_ISO_INVOCATION (coding, 0) = 3; | |
3131 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 3132 | continue; |
4ed46869 KH |
3133 | |
3134 | case 'N': /* invocation of single-shift-2 */ | |
df7492f9 KH |
3135 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
3136 | || CODING_ISO_DESIGNATION (coding, 2) < 0) | |
3137 | goto invalid_code; | |
134b9549 KH |
3138 | charset_id_2 = CODING_ISO_DESIGNATION (coding, 2); |
3139 | if (charset_id_2 < 0) | |
3140 | charset = CHARSET_FROM_ID (charset_ascii); | |
3141 | else | |
3142 | charset = CHARSET_FROM_ID (charset_id_2); | |
b73bfc1c | 3143 | ONE_MORE_BYTE (c1); |
e7046a18 | 3144 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
df7492f9 | 3145 | goto invalid_code; |
4ed46869 KH |
3146 | break; |
3147 | ||
3148 | case 'O': /* invocation of single-shift-3 */ | |
df7492f9 KH |
3149 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
3150 | || CODING_ISO_DESIGNATION (coding, 3) < 0) | |
3151 | goto invalid_code; | |
134b9549 KH |
3152 | charset_id_3 = CODING_ISO_DESIGNATION (coding, 3); |
3153 | if (charset_id_3 < 0) | |
3154 | charset = CHARSET_FROM_ID (charset_ascii); | |
3155 | else | |
3156 | charset = CHARSET_FROM_ID (charset_id_3); | |
b73bfc1c | 3157 | ONE_MORE_BYTE (c1); |
e7046a18 | 3158 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
df7492f9 | 3159 | goto invalid_code; |
4ed46869 KH |
3160 | break; |
3161 | ||
ec6d2bb8 | 3162 | case '0': case '2': case '3': case '4': /* start composition */ |
df7492f9 KH |
3163 | if (! (coding->common_flags & CODING_ANNOTATE_COMPOSITION_MASK)) |
3164 | goto invalid_code; | |
ec6d2bb8 | 3165 | DECODE_COMPOSITION_START (c1); |
b73bfc1c | 3166 | continue; |
4ed46869 | 3167 | |
ec6d2bb8 | 3168 | case '1': /* end composition */ |
df7492f9 KH |
3169 | if (composition_state == COMPOSING_NO) |
3170 | goto invalid_code; | |
3171 | DECODE_COMPOSITION_END (); | |
b73bfc1c | 3172 | continue; |
4ed46869 KH |
3173 | |
3174 | case '[': /* specification of direction */ | |
df7492f9 KH |
3175 | if (! CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DIRECTION) |
3176 | goto invalid_code; | |
4ed46869 | 3177 | /* For the moment, nested direction is not supported. |
d46c5b12 | 3178 | So, `coding->mode & CODING_MODE_DIRECTION' zero means |
df7492f9 | 3179 | left-to-right, and nozero means right-to-left. */ |
4ed46869 KH |
3180 | ONE_MORE_BYTE (c1); |
3181 | switch (c1) | |
3182 | { | |
3183 | case ']': /* end of the current direction */ | |
d46c5b12 | 3184 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 KH |
3185 | |
3186 | case '0': /* end of the current direction */ | |
3187 | case '1': /* start of left-to-right direction */ | |
3188 | ONE_MORE_BYTE (c1); | |
3189 | if (c1 == ']') | |
d46c5b12 | 3190 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 | 3191 | else |
df7492f9 | 3192 | goto invalid_code; |
4ed46869 KH |
3193 | break; |
3194 | ||
3195 | case '2': /* start of right-to-left direction */ | |
3196 | ONE_MORE_BYTE (c1); | |
3197 | if (c1 == ']') | |
d46c5b12 | 3198 | coding->mode |= CODING_MODE_DIRECTION; |
4ed46869 | 3199 | else |
df7492f9 | 3200 | goto invalid_code; |
4ed46869 KH |
3201 | break; |
3202 | ||
3203 | default: | |
df7492f9 | 3204 | goto invalid_code; |
4ed46869 | 3205 | } |
b73bfc1c | 3206 | continue; |
4ed46869 | 3207 | |
103e0180 | 3208 | case '%': |
103e0180 KH |
3209 | ONE_MORE_BYTE (c1); |
3210 | if (c1 == '/') | |
3211 | { | |
3212 | /* CTEXT extended segment: | |
3213 | ESC % / [0-4] M L --ENCODING-NAME-- \002 --BYTES-- | |
3214 | We keep these bytes as is for the moment. | |
3215 | They may be decoded by post-read-conversion. */ | |
3216 | int dim, M, L; | |
4776e638 | 3217 | int size; |
8f924df7 | 3218 | |
103e0180 KH |
3219 | ONE_MORE_BYTE (dim); |
3220 | ONE_MORE_BYTE (M); | |
3221 | ONE_MORE_BYTE (L); | |
3222 | size = ((M - 128) * 128) + (L - 128); | |
4776e638 KH |
3223 | if (charbuf + 8 + size > charbuf_end) |
3224 | goto break_loop; | |
3225 | *charbuf++ = ISO_CODE_ESC; | |
3226 | *charbuf++ = '%'; | |
3227 | *charbuf++ = '/'; | |
3228 | *charbuf++ = dim; | |
3229 | *charbuf++ = BYTE8_TO_CHAR (M); | |
3230 | *charbuf++ = BYTE8_TO_CHAR (L); | |
103e0180 KH |
3231 | while (size-- > 0) |
3232 | { | |
3233 | ONE_MORE_BYTE (c1); | |
4776e638 | 3234 | *charbuf++ = ASCII_BYTE_P (c1) ? c1 : BYTE8_TO_CHAR (c1); |
103e0180 | 3235 | } |
103e0180 KH |
3236 | } |
3237 | else if (c1 == 'G') | |
3238 | { | |
103e0180 KH |
3239 | /* XFree86 extension for embedding UTF-8 in CTEXT: |
3240 | ESC % G --UTF-8-BYTES-- ESC % @ | |
3241 | We keep these bytes as is for the moment. | |
3242 | They may be decoded by post-read-conversion. */ | |
4776e638 KH |
3243 | int *p = charbuf; |
3244 | ||
3245 | if (p + 6 > charbuf_end) | |
3246 | goto break_loop; | |
3247 | *p++ = ISO_CODE_ESC; | |
3248 | *p++ = '%'; | |
3249 | *p++ = 'G'; | |
3250 | while (p < charbuf_end) | |
103e0180 KH |
3251 | { |
3252 | ONE_MORE_BYTE (c1); | |
3253 | if (c1 == ISO_CODE_ESC | |
3254 | && src + 1 < src_end | |
3255 | && src[0] == '%' | |
3256 | && src[1] == '@') | |
9ffd559c KH |
3257 | { |
3258 | src += 2; | |
3259 | break; | |
3260 | } | |
4776e638 | 3261 | *p++ = ASCII_BYTE_P (c1) ? c1 : BYTE8_TO_CHAR (c1); |
103e0180 | 3262 | } |
4776e638 KH |
3263 | if (p + 3 > charbuf_end) |
3264 | goto break_loop; | |
3265 | *p++ = ISO_CODE_ESC; | |
3266 | *p++ = '%'; | |
3267 | *p++ = '@'; | |
3268 | charbuf = p; | |
103e0180 KH |
3269 | } |
3270 | else | |
4776e638 | 3271 | goto invalid_code; |
103e0180 | 3272 | continue; |
4776e638 | 3273 | break; |
103e0180 | 3274 | |
4ed46869 | 3275 | default: |
df7492f9 KH |
3276 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATION)) |
3277 | goto invalid_code; | |
134b9549 KH |
3278 | { |
3279 | int reg, chars96; | |
3280 | ||
3281 | if (c1 >= 0x28 && c1 <= 0x2B) | |
3282 | { /* designation of DIMENSION1_CHARS94 character set */ | |
3283 | reg = c1 - 0x28, chars96 = 0; | |
3284 | ONE_MORE_BYTE (c1); | |
3285 | } | |
3286 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
3287 | { /* designation of DIMENSION1_CHARS96 character set */ | |
3288 | reg = c1 - 0x2C, chars96 = 1; | |
3289 | ONE_MORE_BYTE (c1); | |
3290 | } | |
3291 | else | |
3292 | goto invalid_code; | |
3293 | DECODE_DESIGNATION (reg, 1, chars96, c1); | |
3294 | /* We must update these variables now. */ | |
3295 | if (reg == 0) | |
3296 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
3297 | else if (reg == 1) | |
3298 | charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
3299 | if (chars96 < 0) | |
3300 | goto invalid_code; | |
3301 | } | |
b73bfc1c | 3302 | continue; |
4ed46869 | 3303 | } |
b73bfc1c | 3304 | } |
4ed46869 | 3305 | |
ff0dacd7 KH |
3306 | if (charset->id != charset_ascii |
3307 | && last_id != charset->id) | |
3308 | { | |
3309 | if (last_id != charset_ascii) | |
69a80ea3 | 3310 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
ff0dacd7 KH |
3311 | last_id = charset->id; |
3312 | last_offset = char_offset; | |
3313 | } | |
3314 | ||
b73bfc1c | 3315 | /* Now we know CHARSET and 1st position code C1 of a character. |
df7492f9 KH |
3316 | Produce a decoded character while getting 2nd position code |
3317 | C2 if necessary. */ | |
3318 | c1 &= 0x7F; | |
3319 | if (CHARSET_DIMENSION (charset) > 1) | |
b73bfc1c KH |
3320 | { |
3321 | ONE_MORE_BYTE (c2); | |
df7492f9 | 3322 | if (c2 < 0x20 || (c2 >= 0x80 && c2 < 0xA0)) |
b73bfc1c | 3323 | /* C2 is not in a valid range. */ |
df7492f9 KH |
3324 | goto invalid_code; |
3325 | c1 = (c1 << 8) | (c2 & 0x7F); | |
3326 | if (CHARSET_DIMENSION (charset) > 2) | |
3327 | { | |
3328 | ONE_MORE_BYTE (c2); | |
3329 | if (c2 < 0x20 || (c2 >= 0x80 && c2 < 0xA0)) | |
3330 | /* C2 is not in a valid range. */ | |
3331 | goto invalid_code; | |
3332 | c1 = (c1 << 8) | (c2 & 0x7F); | |
3333 | } | |
3334 | } | |
3335 | ||
3336 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c1, c); | |
3337 | if (c < 0) | |
3338 | { | |
3339 | MAYBE_FINISH_COMPOSITION (); | |
3340 | for (; src_base < src; src_base++, char_offset++) | |
3341 | { | |
3342 | if (ASCII_BYTE_P (*src_base)) | |
3343 | *charbuf++ = *src_base; | |
3344 | else | |
3345 | *charbuf++ = BYTE8_TO_CHAR (*src_base); | |
3346 | } | |
3347 | } | |
3348 | else if (composition_state == COMPOSING_NO) | |
3349 | { | |
3350 | *charbuf++ = c; | |
3351 | char_offset++; | |
4ed46869 | 3352 | } |
df7492f9 | 3353 | else |
781d7a48 KH |
3354 | { |
3355 | components[component_idx++] = c; | |
3356 | if (method == COMPOSITION_WITH_RULE | |
3357 | || (method == COMPOSITION_WITH_RULE_ALTCHARS | |
3358 | && composition_state == COMPOSING_COMPONENT_CHAR)) | |
3359 | composition_state++; | |
4ed46869 KH |
3360 | } |
3361 | continue; | |
3362 | ||
df7492f9 KH |
3363 | invalid_code: |
3364 | MAYBE_FINISH_COMPOSITION (); | |
4ed46869 | 3365 | src = src_base; |
df7492f9 KH |
3366 | consumed_chars = consumed_chars_base; |
3367 | ONE_MORE_BYTE (c); | |
065e3595 | 3368 | *charbuf++ = c < 0 ? -c : ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); |
ff0dacd7 | 3369 | char_offset++; |
df7492f9 | 3370 | coding->errors++; |
4776e638 KH |
3371 | continue; |
3372 | ||
3373 | break_loop: | |
3374 | break; | |
4ed46869 | 3375 | } |
fb88bf2d | 3376 | |
df7492f9 | 3377 | no_more_source: |
ff0dacd7 | 3378 | if (last_id != charset_ascii) |
69a80ea3 | 3379 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
df7492f9 KH |
3380 | coding->consumed_char += consumed_chars_base; |
3381 | coding->consumed = src_base - coding->source; | |
3382 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
3383 | } |
3384 | ||
b73bfc1c | 3385 | |
f4dee582 | 3386 | /* ISO2022 encoding stuff. */ |
4ed46869 KH |
3387 | |
3388 | /* | |
f4dee582 | 3389 | It is not enough to say just "ISO2022" on encoding, we have to |
df7492f9 | 3390 | specify more details. In Emacs, each coding system of ISO2022 |
4ed46869 | 3391 | variant has the following specifications: |
df7492f9 | 3392 | 1. Initial designation to G0 thru G3. |
4ed46869 KH |
3393 | 2. Allows short-form designation? |
3394 | 3. ASCII should be designated to G0 before control characters? | |
3395 | 4. ASCII should be designated to G0 at end of line? | |
3396 | 5. 7-bit environment or 8-bit environment? | |
3397 | 6. Use locking-shift? | |
3398 | 7. Use Single-shift? | |
3399 | And the following two are only for Japanese: | |
3400 | 8. Use ASCII in place of JIS0201-1976-Roman? | |
3401 | 9. Use JISX0208-1983 in place of JISX0208-1978? | |
df7492f9 KH |
3402 | These specifications are encoded in CODING_ISO_FLAGS (coding) as flag bits |
3403 | defined by macros CODING_ISO_FLAG_XXX. See `coding.h' for more | |
f4dee582 | 3404 | details. |
4ed46869 KH |
3405 | */ |
3406 | ||
3407 | /* Produce codes (escape sequence) for designating CHARSET to graphic | |
b73bfc1c KH |
3408 | register REG at DST, and increment DST. If <final-char> of CHARSET is |
3409 | '@', 'A', or 'B' and the coding system CODING allows, produce | |
3410 | designation sequence of short-form. */ | |
4ed46869 KH |
3411 | |
3412 | #define ENCODE_DESIGNATION(charset, reg, coding) \ | |
3413 | do { \ | |
df7492f9 | 3414 | unsigned char final_char = CHARSET_ISO_FINAL (charset); \ |
4ed46869 KH |
3415 | char *intermediate_char_94 = "()*+"; \ |
3416 | char *intermediate_char_96 = ",-./"; \ | |
df7492f9 KH |
3417 | int revision = -1; \ |
3418 | int c; \ | |
3419 | \ | |
3420 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_REVISION) \ | |
c197f191 | 3421 | revision = CHARSET_ISO_REVISION (charset); \ |
df7492f9 KH |
3422 | \ |
3423 | if (revision >= 0) \ | |
70c22245 | 3424 | { \ |
df7492f9 KH |
3425 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, '&'); \ |
3426 | EMIT_ONE_BYTE ('@' + revision); \ | |
4ed46869 | 3427 | } \ |
df7492f9 | 3428 | EMIT_ONE_ASCII_BYTE (ISO_CODE_ESC); \ |
4ed46869 KH |
3429 | if (CHARSET_DIMENSION (charset) == 1) \ |
3430 | { \ | |
df7492f9 KH |
3431 | if (! CHARSET_ISO_CHARS_96 (charset)) \ |
3432 | c = intermediate_char_94[reg]; \ | |
4ed46869 | 3433 | else \ |
df7492f9 KH |
3434 | c = intermediate_char_96[reg]; \ |
3435 | EMIT_ONE_ASCII_BYTE (c); \ | |
4ed46869 KH |
3436 | } \ |
3437 | else \ | |
3438 | { \ | |
df7492f9 KH |
3439 | EMIT_ONE_ASCII_BYTE ('$'); \ |
3440 | if (! CHARSET_ISO_CHARS_96 (charset)) \ | |
4ed46869 | 3441 | { \ |
df7492f9 | 3442 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LONG_FORM \ |
b73bfc1c KH |
3443 | || reg != 0 \ |
3444 | || final_char < '@' || final_char > 'B') \ | |
df7492f9 | 3445 | EMIT_ONE_ASCII_BYTE (intermediate_char_94[reg]); \ |
4ed46869 KH |
3446 | } \ |
3447 | else \ | |
df7492f9 | 3448 | EMIT_ONE_ASCII_BYTE (intermediate_char_96[reg]); \ |
4ed46869 | 3449 | } \ |
df7492f9 KH |
3450 | EMIT_ONE_ASCII_BYTE (final_char); \ |
3451 | \ | |
3452 | CODING_ISO_DESIGNATION (coding, reg) = CHARSET_ID (charset); \ | |
4ed46869 KH |
3453 | } while (0) |
3454 | ||
df7492f9 | 3455 | |
4ed46869 KH |
3456 | /* The following two macros produce codes (control character or escape |
3457 | sequence) for ISO2022 single-shift functions (single-shift-2 and | |
3458 | single-shift-3). */ | |
3459 | ||
df7492f9 KH |
3460 | #define ENCODE_SINGLE_SHIFT_2 \ |
3461 | do { \ | |
3462 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ | |
3463 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'N'); \ | |
3464 | else \ | |
3465 | EMIT_ONE_BYTE (ISO_CODE_SS2); \ | |
3466 | CODING_ISO_SINGLE_SHIFTING (coding) = 1; \ | |
4ed46869 KH |
3467 | } while (0) |
3468 | ||
df7492f9 KH |
3469 | |
3470 | #define ENCODE_SINGLE_SHIFT_3 \ | |
3471 | do { \ | |
3472 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ | |
3473 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'O'); \ | |
3474 | else \ | |
3475 | EMIT_ONE_BYTE (ISO_CODE_SS3); \ | |
3476 | CODING_ISO_SINGLE_SHIFTING (coding) = 1; \ | |
4ed46869 KH |
3477 | } while (0) |
3478 | ||
df7492f9 | 3479 | |
4ed46869 KH |
3480 | /* The following four macros produce codes (control character or |
3481 | escape sequence) for ISO2022 locking-shift functions (shift-in, | |
3482 | shift-out, locking-shift-2, and locking-shift-3). */ | |
3483 | ||
df7492f9 KH |
3484 | #define ENCODE_SHIFT_IN \ |
3485 | do { \ | |
3486 | EMIT_ONE_ASCII_BYTE (ISO_CODE_SI); \ | |
3487 | CODING_ISO_INVOCATION (coding, 0) = 0; \ | |
4ed46869 KH |
3488 | } while (0) |
3489 | ||
df7492f9 KH |
3490 | |
3491 | #define ENCODE_SHIFT_OUT \ | |
3492 | do { \ | |
3493 | EMIT_ONE_ASCII_BYTE (ISO_CODE_SO); \ | |
3494 | CODING_ISO_INVOCATION (coding, 0) = 1; \ | |
4ed46869 KH |
3495 | } while (0) |
3496 | ||
df7492f9 KH |
3497 | |
3498 | #define ENCODE_LOCKING_SHIFT_2 \ | |
3499 | do { \ | |
3500 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'n'); \ | |
3501 | CODING_ISO_INVOCATION (coding, 0) = 2; \ | |
4ed46869 KH |
3502 | } while (0) |
3503 | ||
df7492f9 KH |
3504 | |
3505 | #define ENCODE_LOCKING_SHIFT_3 \ | |
3506 | do { \ | |
3507 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'n'); \ | |
3508 | CODING_ISO_INVOCATION (coding, 0) = 3; \ | |
4ed46869 KH |
3509 | } while (0) |
3510 | ||
df7492f9 | 3511 | |
f4dee582 RS |
3512 | /* Produce codes for a DIMENSION1 character whose character set is |
3513 | CHARSET and whose position-code is C1. Designation and invocation | |
4ed46869 KH |
3514 | sequences are also produced in advance if necessary. */ |
3515 | ||
6e85d753 KH |
3516 | #define ENCODE_ISO_CHARACTER_DIMENSION1(charset, c1) \ |
3517 | do { \ | |
df7492f9 | 3518 | int id = CHARSET_ID (charset); \ |
bf16eb23 KH |
3519 | \ |
3520 | if ((CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_ROMAN) \ | |
3521 | && id == charset_ascii) \ | |
3522 | { \ | |
3523 | id = charset_jisx0201_roman; \ | |
3524 | charset = CHARSET_FROM_ID (id); \ | |
3525 | } \ | |
3526 | \ | |
df7492f9 | 3527 | if (CODING_ISO_SINGLE_SHIFTING (coding)) \ |
6e85d753 | 3528 | { \ |
df7492f9 KH |
3529 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ |
3530 | EMIT_ONE_ASCII_BYTE (c1 & 0x7F); \ | |
6e85d753 | 3531 | else \ |
df7492f9 KH |
3532 | EMIT_ONE_BYTE (c1 | 0x80); \ |
3533 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
6e85d753 KH |
3534 | break; \ |
3535 | } \ | |
df7492f9 | 3536 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 0)) \ |
6e85d753 | 3537 | { \ |
df7492f9 | 3538 | EMIT_ONE_ASCII_BYTE (c1 & 0x7F); \ |
6e85d753 KH |
3539 | break; \ |
3540 | } \ | |
df7492f9 | 3541 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 1)) \ |
6e85d753 | 3542 | { \ |
df7492f9 | 3543 | EMIT_ONE_BYTE (c1 | 0x80); \ |
6e85d753 KH |
3544 | break; \ |
3545 | } \ | |
6e85d753 KH |
3546 | else \ |
3547 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
3548 | must invoke it, or, at first, designate it to some graphic \ | |
3549 | register. Then repeat the loop to actually produce the \ | |
3550 | character. */ \ | |
df7492f9 KH |
3551 | dst = encode_invocation_designation (charset, coding, dst, \ |
3552 | &produced_chars); \ | |
4ed46869 KH |
3553 | } while (1) |
3554 | ||
df7492f9 | 3555 | |
f4dee582 RS |
3556 | /* Produce codes for a DIMENSION2 character whose character set is |
3557 | CHARSET and whose position-codes are C1 and C2. Designation and | |
4ed46869 KH |
3558 | invocation codes are also produced in advance if necessary. */ |
3559 | ||
6e85d753 KH |
3560 | #define ENCODE_ISO_CHARACTER_DIMENSION2(charset, c1, c2) \ |
3561 | do { \ | |
df7492f9 | 3562 | int id = CHARSET_ID (charset); \ |
bf16eb23 KH |
3563 | \ |
3564 | if ((CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_OLDJIS) \ | |
3565 | && id == charset_jisx0208) \ | |
3566 | { \ | |
3567 | id = charset_jisx0208_1978; \ | |
3568 | charset = CHARSET_FROM_ID (id); \ | |
3569 | } \ | |
3570 | \ | |
df7492f9 | 3571 | if (CODING_ISO_SINGLE_SHIFTING (coding)) \ |
6e85d753 | 3572 | { \ |
df7492f9 KH |
3573 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ |
3574 | EMIT_TWO_ASCII_BYTES ((c1) & 0x7F, (c2) & 0x7F); \ | |
6e85d753 | 3575 | else \ |
df7492f9 KH |
3576 | EMIT_TWO_BYTES ((c1) | 0x80, (c2) | 0x80); \ |
3577 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
6e85d753 KH |
3578 | break; \ |
3579 | } \ | |
df7492f9 | 3580 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 0)) \ |
6e85d753 | 3581 | { \ |
df7492f9 | 3582 | EMIT_TWO_ASCII_BYTES ((c1) & 0x7F, (c2) & 0x7F); \ |
6e85d753 KH |
3583 | break; \ |
3584 | } \ | |
df7492f9 | 3585 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 1)) \ |
6e85d753 | 3586 | { \ |
df7492f9 | 3587 | EMIT_TWO_BYTES ((c1) | 0x80, (c2) | 0x80); \ |
6e85d753 KH |
3588 | break; \ |
3589 | } \ | |
6e85d753 KH |
3590 | else \ |
3591 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
3592 | must invoke it, or, at first, designate it to some graphic \ | |
3593 | register. Then repeat the loop to actually produce the \ | |
3594 | character. */ \ | |
df7492f9 KH |
3595 | dst = encode_invocation_designation (charset, coding, dst, \ |
3596 | &produced_chars); \ | |
4ed46869 KH |
3597 | } while (1) |
3598 | ||
05e6f5dc | 3599 | |
df7492f9 KH |
3600 | #define ENCODE_ISO_CHARACTER(charset, c) \ |
3601 | do { \ | |
3602 | int code = ENCODE_CHAR ((charset),(c)); \ | |
3603 | \ | |
3604 | if (CHARSET_DIMENSION (charset) == 1) \ | |
3605 | ENCODE_ISO_CHARACTER_DIMENSION1 ((charset), code); \ | |
3606 | else \ | |
3607 | ENCODE_ISO_CHARACTER_DIMENSION2 ((charset), code >> 8, code & 0xFF); \ | |
84fbb8a0 | 3608 | } while (0) |
bdd9fb48 | 3609 | |
05e6f5dc | 3610 | |
4ed46869 | 3611 | /* Produce designation and invocation codes at a place pointed by DST |
df7492f9 | 3612 | to use CHARSET. The element `spec.iso_2022' of *CODING is updated. |
4ed46869 KH |
3613 | Return new DST. */ |
3614 | ||
3615 | unsigned char * | |
df7492f9 KH |
3616 | encode_invocation_designation (charset, coding, dst, p_nchars) |
3617 | struct charset *charset; | |
4ed46869 KH |
3618 | struct coding_system *coding; |
3619 | unsigned char *dst; | |
df7492f9 | 3620 | int *p_nchars; |
4ed46869 | 3621 | { |
df7492f9 KH |
3622 | int multibytep = coding->dst_multibyte; |
3623 | int produced_chars = *p_nchars; | |
4ed46869 | 3624 | int reg; /* graphic register number */ |
df7492f9 | 3625 | int id = CHARSET_ID (charset); |
4ed46869 KH |
3626 | |
3627 | /* At first, check designations. */ | |
3628 | for (reg = 0; reg < 4; reg++) | |
df7492f9 | 3629 | if (id == CODING_ISO_DESIGNATION (coding, reg)) |
4ed46869 KH |
3630 | break; |
3631 | ||
3632 | if (reg >= 4) | |
3633 | { | |
3634 | /* CHARSET is not yet designated to any graphic registers. */ | |
3635 | /* At first check the requested designation. */ | |
df7492f9 KH |
3636 | reg = CODING_ISO_REQUEST (coding, id); |
3637 | if (reg < 0) | |
1ba9e4ab KH |
3638 | /* Since CHARSET requests no special designation, designate it |
3639 | to graphic register 0. */ | |
4ed46869 KH |
3640 | reg = 0; |
3641 | ||
3642 | ENCODE_DESIGNATION (charset, reg, coding); | |
3643 | } | |
3644 | ||
df7492f9 KH |
3645 | if (CODING_ISO_INVOCATION (coding, 0) != reg |
3646 | && CODING_ISO_INVOCATION (coding, 1) != reg) | |
4ed46869 KH |
3647 | { |
3648 | /* Since the graphic register REG is not invoked to any graphic | |
3649 | planes, invoke it to graphic plane 0. */ | |
3650 | switch (reg) | |
3651 | { | |
3652 | case 0: /* graphic register 0 */ | |
3653 | ENCODE_SHIFT_IN; | |
3654 | break; | |
3655 | ||
3656 | case 1: /* graphic register 1 */ | |
3657 | ENCODE_SHIFT_OUT; | |
3658 | break; | |
3659 | ||
3660 | case 2: /* graphic register 2 */ | |
df7492f9 | 3661 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
4ed46869 KH |
3662 | ENCODE_SINGLE_SHIFT_2; |
3663 | else | |
3664 | ENCODE_LOCKING_SHIFT_2; | |
3665 | break; | |
3666 | ||
3667 | case 3: /* graphic register 3 */ | |
df7492f9 | 3668 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
4ed46869 KH |
3669 | ENCODE_SINGLE_SHIFT_3; |
3670 | else | |
3671 | ENCODE_LOCKING_SHIFT_3; | |
3672 | break; | |
3673 | } | |
3674 | } | |
b73bfc1c | 3675 | |
df7492f9 | 3676 | *p_nchars = produced_chars; |
4ed46869 KH |
3677 | return dst; |
3678 | } | |
3679 | ||
df7492f9 KH |
3680 | /* The following three macros produce codes for indicating direction |
3681 | of text. */ | |
3682 | #define ENCODE_CONTROL_SEQUENCE_INTRODUCER \ | |
ec6d2bb8 | 3683 | do { \ |
df7492f9 KH |
3684 | if (CODING_ISO_FLAGS (coding) == CODING_ISO_FLAG_SEVEN_BITS) \ |
3685 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, '['); \ | |
ec6d2bb8 | 3686 | else \ |
df7492f9 | 3687 | EMIT_ONE_BYTE (ISO_CODE_CSI); \ |
ec6d2bb8 KH |
3688 | } while (0) |
3689 | ||
ec6d2bb8 | 3690 | |
df7492f9 KH |
3691 | #define ENCODE_DIRECTION_R2L() \ |
3692 | do { \ | |
3693 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst); \ | |
3694 | EMIT_TWO_ASCII_BYTES ('2', ']'); \ | |
ec6d2bb8 KH |
3695 | } while (0) |
3696 | ||
ec6d2bb8 | 3697 | |
df7492f9 | 3698 | #define ENCODE_DIRECTION_L2R() \ |
ec6d2bb8 | 3699 | do { \ |
df7492f9 KH |
3700 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst); \ |
3701 | EMIT_TWO_ASCII_BYTES ('0', ']'); \ | |
ec6d2bb8 | 3702 | } while (0) |
4ed46869 | 3703 | |
4ed46869 KH |
3704 | |
3705 | /* Produce codes for designation and invocation to reset the graphic | |
3706 | planes and registers to initial state. */ | |
df7492f9 KH |
3707 | #define ENCODE_RESET_PLANE_AND_REGISTER() \ |
3708 | do { \ | |
3709 | int reg; \ | |
3710 | struct charset *charset; \ | |
3711 | \ | |
3712 | if (CODING_ISO_INVOCATION (coding, 0) != 0) \ | |
3713 | ENCODE_SHIFT_IN; \ | |
3714 | for (reg = 0; reg < 4; reg++) \ | |
3715 | if (CODING_ISO_INITIAL (coding, reg) >= 0 \ | |
3716 | && (CODING_ISO_DESIGNATION (coding, reg) \ | |
3717 | != CODING_ISO_INITIAL (coding, reg))) \ | |
3718 | { \ | |
3719 | charset = CHARSET_FROM_ID (CODING_ISO_INITIAL (coding, reg)); \ | |
3720 | ENCODE_DESIGNATION (charset, reg, coding); \ | |
3721 | } \ | |
4ed46869 KH |
3722 | } while (0) |
3723 | ||
df7492f9 | 3724 | |
bdd9fb48 | 3725 | /* Produce designation sequences of charsets in the line started from |
b73bfc1c | 3726 | SRC to a place pointed by DST, and return updated DST. |
bdd9fb48 KH |
3727 | |
3728 | If the current block ends before any end-of-line, we may fail to | |
d46c5b12 KH |
3729 | find all the necessary designations. */ |
3730 | ||
b73bfc1c | 3731 | static unsigned char * |
df7492f9 | 3732 | encode_designation_at_bol (coding, charbuf, charbuf_end, dst) |
e0e989f6 | 3733 | struct coding_system *coding; |
df7492f9 KH |
3734 | int *charbuf, *charbuf_end; |
3735 | unsigned char *dst; | |
e0e989f6 | 3736 | { |
df7492f9 | 3737 | struct charset *charset; |
bdd9fb48 KH |
3738 | /* Table of charsets to be designated to each graphic register. */ |
3739 | int r[4]; | |
df7492f9 KH |
3740 | int c, found = 0, reg; |
3741 | int produced_chars = 0; | |
3742 | int multibytep = coding->dst_multibyte; | |
3743 | Lisp_Object attrs; | |
3744 | Lisp_Object charset_list; | |
3745 | ||
3746 | attrs = CODING_ID_ATTRS (coding->id); | |
3747 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
3748 | if (EQ (charset_list, Qiso_2022)) | |
3749 | charset_list = Viso_2022_charset_list; | |
bdd9fb48 KH |
3750 | |
3751 | for (reg = 0; reg < 4; reg++) | |
3752 | r[reg] = -1; | |
3753 | ||
b73bfc1c | 3754 | while (found < 4) |
e0e989f6 | 3755 | { |
df7492f9 KH |
3756 | int id; |
3757 | ||
3758 | c = *charbuf++; | |
b73bfc1c KH |
3759 | if (c == '\n') |
3760 | break; | |
df7492f9 KH |
3761 | charset = char_charset (c, charset_list, NULL); |
3762 | id = CHARSET_ID (charset); | |
3763 | reg = CODING_ISO_REQUEST (coding, id); | |
3764 | if (reg >= 0 && r[reg] < 0) | |
bdd9fb48 KH |
3765 | { |
3766 | found++; | |
df7492f9 | 3767 | r[reg] = id; |
bdd9fb48 | 3768 | } |
bdd9fb48 KH |
3769 | } |
3770 | ||
3771 | if (found) | |
3772 | { | |
3773 | for (reg = 0; reg < 4; reg++) | |
3774 | if (r[reg] >= 0 | |
df7492f9 KH |
3775 | && CODING_ISO_DESIGNATION (coding, reg) != r[reg]) |
3776 | ENCODE_DESIGNATION (CHARSET_FROM_ID (r[reg]), reg, coding); | |
e0e989f6 | 3777 | } |
b73bfc1c KH |
3778 | |
3779 | return dst; | |
e0e989f6 KH |
3780 | } |
3781 | ||
4ed46869 KH |
3782 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */ |
3783 | ||
df7492f9 KH |
3784 | static int |
3785 | encode_coding_iso_2022 (coding) | |
4ed46869 | 3786 | struct coding_system *coding; |
4ed46869 | 3787 | { |
df7492f9 KH |
3788 | int multibytep = coding->dst_multibyte; |
3789 | int *charbuf = coding->charbuf; | |
3790 | int *charbuf_end = charbuf + coding->charbuf_used; | |
3791 | unsigned char *dst = coding->destination + coding->produced; | |
3792 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
3793 | int safe_room = 16; | |
3794 | int bol_designation | |
3795 | = (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATE_AT_BOL | |
3796 | && CODING_ISO_BOL (coding)); | |
3797 | int produced_chars = 0; | |
3798 | Lisp_Object attrs, eol_type, charset_list; | |
3799 | int ascii_compatible; | |
b73bfc1c | 3800 | int c; |
ff0dacd7 | 3801 | int preferred_charset_id = -1; |
05e6f5dc | 3802 | |
24a73b0a KH |
3803 | CODING_GET_INFO (coding, attrs, charset_list); |
3804 | eol_type = CODING_ID_EOL_TYPE (coding->id); | |
3805 | if (VECTORP (eol_type)) | |
3806 | eol_type = Qunix; | |
3807 | ||
004068e4 | 3808 | setup_iso_safe_charsets (attrs); |
ff0dacd7 | 3809 | /* Charset list may have been changed. */ |
287c57d7 | 3810 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); |
8f924df7 | 3811 | coding->safe_charsets = (char *) SDATA (CODING_ATTR_SAFE_CHARSETS(attrs)); |
0eecad43 | 3812 | |
df7492f9 | 3813 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); |
bdd9fb48 | 3814 | |
df7492f9 | 3815 | while (charbuf < charbuf_end) |
4ed46869 | 3816 | { |
df7492f9 | 3817 | ASSURE_DESTINATION (safe_room); |
b73bfc1c | 3818 | |
df7492f9 | 3819 | if (bol_designation) |
b73bfc1c | 3820 | { |
df7492f9 | 3821 | unsigned char *dst_prev = dst; |
4ed46869 | 3822 | |
bdd9fb48 | 3823 | /* We have to produce designation sequences if any now. */ |
df7492f9 KH |
3824 | dst = encode_designation_at_bol (coding, charbuf, charbuf_end, dst); |
3825 | bol_designation = 0; | |
3826 | /* We are sure that designation sequences are all ASCII bytes. */ | |
3827 | produced_chars += dst - dst_prev; | |
e0e989f6 KH |
3828 | } |
3829 | ||
df7492f9 | 3830 | c = *charbuf++; |
ec6d2bb8 | 3831 | |
ff0dacd7 KH |
3832 | if (c < 0) |
3833 | { | |
3834 | /* Handle an annotation. */ | |
3835 | switch (*charbuf) | |
ec6d2bb8 | 3836 | { |
ff0dacd7 KH |
3837 | case CODING_ANNOTATE_COMPOSITION_MASK: |
3838 | /* Not yet implemented. */ | |
3839 | break; | |
3840 | case CODING_ANNOTATE_CHARSET_MASK: | |
cf7dfdf5 | 3841 | preferred_charset_id = charbuf[2]; |
ff0dacd7 KH |
3842 | if (preferred_charset_id >= 0 |
3843 | && NILP (Fmemq (make_number (preferred_charset_id), | |
3844 | charset_list))) | |
3845 | preferred_charset_id = -1; | |
3846 | break; | |
3847 | default: | |
3848 | abort (); | |
4ed46869 | 3849 | } |
ff0dacd7 KH |
3850 | charbuf += -c - 1; |
3851 | continue; | |
4ed46869 | 3852 | } |
ec6d2bb8 | 3853 | |
b73bfc1c KH |
3854 | /* Now encode the character C. */ |
3855 | if (c < 0x20 || c == 0x7F) | |
3856 | { | |
df7492f9 KH |
3857 | if (c == '\n' |
3858 | || (c == '\r' && EQ (eol_type, Qmac))) | |
19a8d9e0 | 3859 | { |
df7492f9 KH |
3860 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_EOL) |
3861 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3862 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_INIT_AT_BOL) | |
b73bfc1c | 3863 | { |
df7492f9 KH |
3864 | int i; |
3865 | ||
3866 | for (i = 0; i < 4; i++) | |
3867 | CODING_ISO_DESIGNATION (coding, i) | |
3868 | = CODING_ISO_INITIAL (coding, i); | |
b73bfc1c | 3869 | } |
df7492f9 KH |
3870 | bol_designation |
3871 | = CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATE_AT_BOL; | |
19a8d9e0 | 3872 | } |
df7492f9 KH |
3873 | else if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_CNTL) |
3874 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3875 | EMIT_ONE_ASCII_BYTE (c); | |
4ed46869 | 3876 | } |
df7492f9 | 3877 | else if (ASCII_CHAR_P (c)) |
88993dfd | 3878 | { |
df7492f9 KH |
3879 | if (ascii_compatible) |
3880 | EMIT_ONE_ASCII_BYTE (c); | |
93dec019 | 3881 | else |
19a8d9e0 | 3882 | { |
bf16eb23 KH |
3883 | struct charset *charset = CHARSET_FROM_ID (charset_ascii); |
3884 | ENCODE_ISO_CHARACTER (charset, c); | |
19a8d9e0 | 3885 | } |
4ed46869 | 3886 | } |
16eafb5d | 3887 | else if (CHAR_BYTE8_P (c)) |
88993dfd | 3888 | { |
16eafb5d KH |
3889 | c = CHAR_TO_BYTE8 (c); |
3890 | EMIT_ONE_BYTE (c); | |
88993dfd | 3891 | } |
b73bfc1c | 3892 | else |
df7492f9 | 3893 | { |
ff0dacd7 | 3894 | struct charset *charset; |
b73bfc1c | 3895 | |
ff0dacd7 KH |
3896 | if (preferred_charset_id >= 0) |
3897 | { | |
3898 | charset = CHARSET_FROM_ID (preferred_charset_id); | |
3899 | if (! CHAR_CHARSET_P (c, charset)) | |
3900 | charset = char_charset (c, charset_list, NULL); | |
3901 | } | |
3902 | else | |
3903 | charset = char_charset (c, charset_list, NULL); | |
df7492f9 KH |
3904 | if (!charset) |
3905 | { | |
41cbe562 KH |
3906 | if (coding->mode & CODING_MODE_SAFE_ENCODING) |
3907 | { | |
3908 | c = CODING_INHIBIT_CHARACTER_SUBSTITUTION; | |
3909 | charset = CHARSET_FROM_ID (charset_ascii); | |
3910 | } | |
3911 | else | |
3912 | { | |
3913 | c = coding->default_char; | |
3914 | charset = char_charset (c, charset_list, NULL); | |
3915 | } | |
df7492f9 KH |
3916 | } |
3917 | ENCODE_ISO_CHARACTER (charset, c); | |
3918 | } | |
84fbb8a0 | 3919 | } |
b73bfc1c | 3920 | |
df7492f9 KH |
3921 | if (coding->mode & CODING_MODE_LAST_BLOCK |
3922 | && CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_EOL) | |
3923 | { | |
3924 | ASSURE_DESTINATION (safe_room); | |
3925 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3926 | } | |
065e3595 | 3927 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
3928 | CODING_ISO_BOL (coding) = bol_designation; |
3929 | coding->produced_char += produced_chars; | |
3930 | coding->produced = dst - coding->destination; | |
3931 | return 0; | |
4ed46869 KH |
3932 | } |
3933 | ||
3934 | \f | |
df7492f9 | 3935 | /*** 8,9. SJIS and BIG5 handlers ***/ |
4ed46869 | 3936 | |
df7492f9 | 3937 | /* Although SJIS and BIG5 are not ISO's coding system, they are used |
4ed46869 KH |
3938 | quite widely. So, for the moment, Emacs supports them in the bare |
3939 | C code. But, in the future, they may be supported only by CCL. */ | |
3940 | ||
3941 | /* SJIS is a coding system encoding three character sets: ASCII, right | |
3942 | half of JISX0201-Kana, and JISX0208. An ASCII character is encoded | |
3943 | as is. A character of charset katakana-jisx0201 is encoded by | |
3944 | "position-code + 0x80". A character of charset japanese-jisx0208 | |
3945 | is encoded in 2-byte but two position-codes are divided and shifted | |
df7492f9 | 3946 | so that it fit in the range below. |
4ed46869 KH |
3947 | |
3948 | --- CODE RANGE of SJIS --- | |
3949 | (character set) (range) | |
3950 | ASCII 0x00 .. 0x7F | |
df7492f9 | 3951 | KATAKANA-JISX0201 0xA0 .. 0xDF |
c28a9453 | 3952 | JISX0208 (1st byte) 0x81 .. 0x9F and 0xE0 .. 0xEF |
d14d03ac | 3953 | (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC |
4ed46869 KH |
3954 | ------------------------------- |
3955 | ||
3956 | */ | |
3957 | ||
3958 | /* BIG5 is a coding system encoding two character sets: ASCII and | |
3959 | Big5. An ASCII character is encoded as is. Big5 is a two-byte | |
df7492f9 | 3960 | character set and is encoded in two-byte. |
4ed46869 KH |
3961 | |
3962 | --- CODE RANGE of BIG5 --- | |
3963 | (character set) (range) | |
3964 | ASCII 0x00 .. 0x7F | |
3965 | Big5 (1st byte) 0xA1 .. 0xFE | |
3966 | (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE | |
3967 | -------------------------- | |
3968 | ||
df7492f9 | 3969 | */ |
4ed46869 KH |
3970 | |
3971 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3972 | Check if a text is encoded in SJIS. If it is, return | |
df7492f9 | 3973 | CATEGORY_MASK_SJIS, else return 0. */ |
4ed46869 | 3974 | |
0a28aafb | 3975 | static int |
ff0dacd7 | 3976 | detect_coding_sjis (coding, detect_info) |
df7492f9 | 3977 | struct coding_system *coding; |
ff0dacd7 | 3978 | struct coding_detection_info *detect_info; |
4ed46869 | 3979 | { |
065e3595 | 3980 | const unsigned char *src = coding->source, *src_base; |
8f924df7 | 3981 | const unsigned char *src_end = coding->source + coding->src_bytes; |
df7492f9 KH |
3982 | int multibytep = coding->src_multibyte; |
3983 | int consumed_chars = 0; | |
3984 | int found = 0; | |
b73bfc1c | 3985 | int c; |
df7492f9 | 3986 | |
ff0dacd7 | 3987 | detect_info->checked |= CATEGORY_MASK_SJIS; |
df7492f9 KH |
3988 | /* A coding system of this category is always ASCII compatible. */ |
3989 | src += coding->head_ascii; | |
4ed46869 | 3990 | |
b73bfc1c | 3991 | while (1) |
4ed46869 | 3992 | { |
065e3595 | 3993 | src_base = src; |
df7492f9 | 3994 | ONE_MORE_BYTE (c); |
682169fe KH |
3995 | if (c < 0x80) |
3996 | continue; | |
df7492f9 | 3997 | if ((c >= 0x81 && c <= 0x9F) || (c >= 0xE0 && c <= 0xEF)) |
4ed46869 | 3998 | { |
df7492f9 | 3999 | ONE_MORE_BYTE (c); |
682169fe | 4000 | if (c < 0x40 || c == 0x7F || c > 0xFC) |
df7492f9 | 4001 | break; |
ff0dacd7 | 4002 | found = CATEGORY_MASK_SJIS; |
4ed46869 | 4003 | } |
df7492f9 | 4004 | else if (c >= 0xA0 && c < 0xE0) |
ff0dacd7 | 4005 | found = CATEGORY_MASK_SJIS; |
df7492f9 KH |
4006 | else |
4007 | break; | |
4ed46869 | 4008 | } |
ff0dacd7 | 4009 | detect_info->rejected |= CATEGORY_MASK_SJIS; |
df7492f9 KH |
4010 | return 0; |
4011 | ||
4012 | no_more_source: | |
065e3595 | 4013 | if (src_base < src && coding->mode & CODING_MODE_LAST_BLOCK) |
89528eb3 | 4014 | { |
ff0dacd7 | 4015 | detect_info->rejected |= CATEGORY_MASK_SJIS; |
89528eb3 | 4016 | return 0; |
4ed46869 | 4017 | } |
ff0dacd7 KH |
4018 | detect_info->found |= found; |
4019 | return 1; | |
4ed46869 KH |
4020 | } |
4021 | ||
4022 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
4023 | Check if a text is encoded in BIG5. If it is, return | |
df7492f9 | 4024 | CATEGORY_MASK_BIG5, else return 0. */ |
4ed46869 | 4025 | |
0a28aafb | 4026 | static int |
ff0dacd7 | 4027 | detect_coding_big5 (coding, detect_info) |
df7492f9 | 4028 | struct coding_system *coding; |
ff0dacd7 | 4029 | struct coding_detection_info *detect_info; |
4ed46869 | 4030 | { |
065e3595 | 4031 | const unsigned char *src = coding->source, *src_base; |
8f924df7 | 4032 | const unsigned char *src_end = coding->source + coding->src_bytes; |
df7492f9 KH |
4033 | int multibytep = coding->src_multibyte; |
4034 | int consumed_chars = 0; | |
4035 | int found = 0; | |
b73bfc1c | 4036 | int c; |
fa42c37f | 4037 | |
ff0dacd7 | 4038 | detect_info->checked |= CATEGORY_MASK_BIG5; |
df7492f9 KH |
4039 | /* A coding system of this category is always ASCII compatible. */ |
4040 | src += coding->head_ascii; | |
fa42c37f | 4041 | |
b73bfc1c | 4042 | while (1) |
fa42c37f | 4043 | { |
065e3595 | 4044 | src_base = src; |
df7492f9 KH |
4045 | ONE_MORE_BYTE (c); |
4046 | if (c < 0x80) | |
fa42c37f | 4047 | continue; |
df7492f9 | 4048 | if (c >= 0xA1) |
fa42c37f | 4049 | { |
df7492f9 KH |
4050 | ONE_MORE_BYTE (c); |
4051 | if (c < 0x40 || (c >= 0x7F && c <= 0xA0)) | |
fa42c37f | 4052 | return 0; |
ff0dacd7 | 4053 | found = CATEGORY_MASK_BIG5; |
fa42c37f | 4054 | } |
df7492f9 KH |
4055 | else |
4056 | break; | |
fa42c37f | 4057 | } |
ff0dacd7 | 4058 | detect_info->rejected |= CATEGORY_MASK_BIG5; |
fa42c37f | 4059 | return 0; |
fa42c37f | 4060 | |
df7492f9 | 4061 | no_more_source: |
065e3595 | 4062 | if (src_base < src && coding->mode & CODING_MODE_LAST_BLOCK) |
89528eb3 | 4063 | { |
ff0dacd7 | 4064 | detect_info->rejected |= CATEGORY_MASK_BIG5; |
89528eb3 KH |
4065 | return 0; |
4066 | } | |
ff0dacd7 KH |
4067 | detect_info->found |= found; |
4068 | return 1; | |
fa42c37f KH |
4069 | } |
4070 | ||
4ed46869 KH |
4071 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". |
4072 | If SJIS_P is 1, decode SJIS text, else decode BIG5 test. */ | |
fa42c37f | 4073 | |
b73bfc1c | 4074 | static void |
df7492f9 | 4075 | decode_coding_sjis (coding) |
4ed46869 | 4076 | struct coding_system *coding; |
4ed46869 | 4077 | { |
8f924df7 KH |
4078 | const unsigned char *src = coding->source + coding->consumed; |
4079 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
4080 | const unsigned char *src_base; | |
69a80ea3 KH |
4081 | int *charbuf = coding->charbuf + coding->charbuf_used; |
4082 | int *charbuf_end | |
4083 | = coding->charbuf + coding->charbuf_size - MAX_ANNOTATION_LENGTH; | |
df7492f9 KH |
4084 | int consumed_chars = 0, consumed_chars_base; |
4085 | int multibytep = coding->src_multibyte; | |
4086 | struct charset *charset_roman, *charset_kanji, *charset_kana; | |
57a47f8a | 4087 | struct charset *charset_kanji2; |
24a73b0a | 4088 | Lisp_Object attrs, charset_list, val; |
ff0dacd7 KH |
4089 | int char_offset = coding->produced_char; |
4090 | int last_offset = char_offset; | |
4091 | int last_id = charset_ascii; | |
a5d301df | 4092 | |
24a73b0a | 4093 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 KH |
4094 | |
4095 | val = charset_list; | |
4096 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
89528eb3 | 4097 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); |
57a47f8a KH |
4098 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); |
4099 | charset_kanji2 = NILP (val) ? NULL : CHARSET_FROM_ID (XINT (XCAR (val))); | |
fa42c37f | 4100 | |
b73bfc1c | 4101 | while (1) |
4ed46869 | 4102 | { |
df7492f9 | 4103 | int c, c1; |
24a73b0a | 4104 | struct charset *charset; |
fa42c37f | 4105 | |
b73bfc1c | 4106 | src_base = src; |
df7492f9 | 4107 | consumed_chars_base = consumed_chars; |
fa42c37f | 4108 | |
df7492f9 KH |
4109 | if (charbuf >= charbuf_end) |
4110 | break; | |
4111 | ||
4112 | ONE_MORE_BYTE (c); | |
065e3595 KH |
4113 | if (c < 0) |
4114 | goto invalid_code; | |
24a73b0a KH |
4115 | if (c < 0x80) |
4116 | charset = charset_roman; | |
57a47f8a | 4117 | else if (c == 0x80 || c == 0xA0) |
8e921c4b | 4118 | goto invalid_code; |
57a47f8a KH |
4119 | else if (c >= 0xA1 && c <= 0xDF) |
4120 | { | |
4121 | /* SJIS -> JISX0201-Kana */ | |
4122 | c &= 0x7F; | |
4123 | charset = charset_kana; | |
4124 | } | |
4125 | else if (c <= 0xEF) | |
df7492f9 | 4126 | { |
57a47f8a KH |
4127 | /* SJIS -> JISX0208 */ |
4128 | ONE_MORE_BYTE (c1); | |
4129 | if (c1 < 0x40 || c1 == 0x7F || c1 > 0xFC) | |
24a73b0a | 4130 | goto invalid_code; |
57a47f8a KH |
4131 | c = (c << 8) | c1; |
4132 | SJIS_TO_JIS (c); | |
4133 | charset = charset_kanji; | |
4134 | } | |
4135 | else if (c <= 0xFC && charset_kanji2) | |
4136 | { | |
c6876370 | 4137 | /* SJIS -> JISX0213-2 */ |
57a47f8a KH |
4138 | ONE_MORE_BYTE (c1); |
4139 | if (c1 < 0x40 || c1 == 0x7F || c1 > 0xFC) | |
24a73b0a | 4140 | goto invalid_code; |
57a47f8a KH |
4141 | c = (c << 8) | c1; |
4142 | SJIS_TO_JIS2 (c); | |
4143 | charset = charset_kanji2; | |
df7492f9 | 4144 | } |
57a47f8a KH |
4145 | else |
4146 | goto invalid_code; | |
24a73b0a KH |
4147 | if (charset->id != charset_ascii |
4148 | && last_id != charset->id) | |
4149 | { | |
4150 | if (last_id != charset_ascii) | |
69a80ea3 | 4151 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
24a73b0a KH |
4152 | last_id = charset->id; |
4153 | last_offset = char_offset; | |
4154 | } | |
4155 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c, c); | |
df7492f9 | 4156 | *charbuf++ = c; |
ff0dacd7 | 4157 | char_offset++; |
df7492f9 | 4158 | continue; |
b73bfc1c | 4159 | |
df7492f9 KH |
4160 | invalid_code: |
4161 | src = src_base; | |
4162 | consumed_chars = consumed_chars_base; | |
4163 | ONE_MORE_BYTE (c); | |
065e3595 | 4164 | *charbuf++ = c < 0 ? -c : BYTE8_TO_CHAR (c); |
ff0dacd7 | 4165 | char_offset++; |
df7492f9 KH |
4166 | coding->errors++; |
4167 | } | |
fa42c37f | 4168 | |
df7492f9 | 4169 | no_more_source: |
ff0dacd7 | 4170 | if (last_id != charset_ascii) |
69a80ea3 | 4171 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
df7492f9 KH |
4172 | coding->consumed_char += consumed_chars_base; |
4173 | coding->consumed = src_base - coding->source; | |
4174 | coding->charbuf_used = charbuf - coding->charbuf; | |
fa42c37f KH |
4175 | } |
4176 | ||
b73bfc1c | 4177 | static void |
df7492f9 | 4178 | decode_coding_big5 (coding) |
4ed46869 | 4179 | struct coding_system *coding; |
4ed46869 | 4180 | { |
8f924df7 KH |
4181 | const unsigned char *src = coding->source + coding->consumed; |
4182 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
4183 | const unsigned char *src_base; | |
69a80ea3 KH |
4184 | int *charbuf = coding->charbuf + coding->charbuf_used; |
4185 | int *charbuf_end | |
4186 | = coding->charbuf + coding->charbuf_size - MAX_ANNOTATION_LENGTH; | |
df7492f9 KH |
4187 | int consumed_chars = 0, consumed_chars_base; |
4188 | int multibytep = coding->src_multibyte; | |
4189 | struct charset *charset_roman, *charset_big5; | |
24a73b0a | 4190 | Lisp_Object attrs, charset_list, val; |
ff0dacd7 KH |
4191 | int char_offset = coding->produced_char; |
4192 | int last_offset = char_offset; | |
4193 | int last_id = charset_ascii; | |
df7492f9 | 4194 | |
24a73b0a | 4195 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 KH |
4196 | val = charset_list; |
4197 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
4198 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
4ed46869 | 4199 | |
b73bfc1c | 4200 | while (1) |
4ed46869 | 4201 | { |
df7492f9 | 4202 | int c, c1; |
24a73b0a | 4203 | struct charset *charset; |
b73bfc1c KH |
4204 | |
4205 | src_base = src; | |
df7492f9 KH |
4206 | consumed_chars_base = consumed_chars; |
4207 | ||
4208 | if (charbuf >= charbuf_end) | |
4209 | break; | |
4210 | ||
4211 | ONE_MORE_BYTE (c); | |
b73bfc1c | 4212 | |
065e3595 KH |
4213 | if (c < 0) |
4214 | goto invalid_code; | |
24a73b0a KH |
4215 | if (c < 0x80) |
4216 | charset = charset_roman; | |
4217 | else | |
4ed46869 | 4218 | { |
24a73b0a KH |
4219 | /* BIG5 -> Big5 */ |
4220 | if (c < 0xA1 || c > 0xFE) | |
4221 | goto invalid_code; | |
4222 | ONE_MORE_BYTE (c1); | |
4223 | if (c1 < 0x40 || (c1 > 0x7E && c1 < 0xA1) || c1 > 0xFE) | |
4224 | goto invalid_code; | |
4225 | c = c << 8 | c1; | |
4226 | charset = charset_big5; | |
4ed46869 | 4227 | } |
24a73b0a KH |
4228 | if (charset->id != charset_ascii |
4229 | && last_id != charset->id) | |
df7492f9 | 4230 | { |
24a73b0a | 4231 | if (last_id != charset_ascii) |
69a80ea3 | 4232 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
24a73b0a KH |
4233 | last_id = charset->id; |
4234 | last_offset = char_offset; | |
4ed46869 | 4235 | } |
24a73b0a | 4236 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c, c); |
df7492f9 | 4237 | *charbuf++ = c; |
ff0dacd7 | 4238 | char_offset++; |
fb88bf2d KH |
4239 | continue; |
4240 | ||
df7492f9 | 4241 | invalid_code: |
4ed46869 | 4242 | src = src_base; |
df7492f9 KH |
4243 | consumed_chars = consumed_chars_base; |
4244 | ONE_MORE_BYTE (c); | |
065e3595 | 4245 | *charbuf++ = c < 0 ? -c : BYTE8_TO_CHAR (c); |
ff0dacd7 | 4246 | char_offset++; |
df7492f9 | 4247 | coding->errors++; |
fb88bf2d | 4248 | } |
d46c5b12 | 4249 | |
df7492f9 | 4250 | no_more_source: |
ff0dacd7 | 4251 | if (last_id != charset_ascii) |
69a80ea3 | 4252 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
df7492f9 KH |
4253 | coding->consumed_char += consumed_chars_base; |
4254 | coding->consumed = src_base - coding->source; | |
4255 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
4256 | } |
4257 | ||
4258 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". | |
b73bfc1c KH |
4259 | This function can encode charsets `ascii', `katakana-jisx0201', |
4260 | `japanese-jisx0208', `chinese-big5-1', and `chinese-big5-2'. We | |
4261 | are sure that all these charsets are registered as official charset | |
4ed46869 KH |
4262 | (i.e. do not have extended leading-codes). Characters of other |
4263 | charsets are produced without any encoding. If SJIS_P is 1, encode | |
4264 | SJIS text, else encode BIG5 text. */ | |
4265 | ||
df7492f9 KH |
4266 | static int |
4267 | encode_coding_sjis (coding) | |
4ed46869 | 4268 | struct coding_system *coding; |
4ed46869 | 4269 | { |
df7492f9 KH |
4270 | int multibytep = coding->dst_multibyte; |
4271 | int *charbuf = coding->charbuf; | |
4272 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4273 | unsigned char *dst = coding->destination + coding->produced; | |
4274 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4275 | int safe_room = 4; | |
4276 | int produced_chars = 0; | |
24a73b0a | 4277 | Lisp_Object attrs, charset_list, val; |
df7492f9 KH |
4278 | int ascii_compatible; |
4279 | struct charset *charset_roman, *charset_kanji, *charset_kana; | |
57a47f8a | 4280 | struct charset *charset_kanji2; |
df7492f9 | 4281 | int c; |
a5d301df | 4282 | |
24a73b0a | 4283 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 KH |
4284 | val = charset_list; |
4285 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
4286 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
57a47f8a KH |
4287 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); |
4288 | charset_kanji2 = NILP (val) ? NULL : CHARSET_FROM_ID (XINT (XCAR (val))); | |
4ed46869 | 4289 | |
df7492f9 | 4290 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); |
93dec019 | 4291 | |
df7492f9 KH |
4292 | while (charbuf < charbuf_end) |
4293 | { | |
4294 | ASSURE_DESTINATION (safe_room); | |
4295 | c = *charbuf++; | |
b73bfc1c | 4296 | /* Now encode the character C. */ |
df7492f9 KH |
4297 | if (ASCII_CHAR_P (c) && ascii_compatible) |
4298 | EMIT_ONE_ASCII_BYTE (c); | |
16eafb5d KH |
4299 | else if (CHAR_BYTE8_P (c)) |
4300 | { | |
4301 | c = CHAR_TO_BYTE8 (c); | |
4302 | EMIT_ONE_BYTE (c); | |
4303 | } | |
df7492f9 | 4304 | else |
b73bfc1c | 4305 | { |
df7492f9 KH |
4306 | unsigned code; |
4307 | struct charset *charset = char_charset (c, charset_list, &code); | |
4308 | ||
4309 | if (!charset) | |
4ed46869 | 4310 | { |
41cbe562 | 4311 | if (coding->mode & CODING_MODE_SAFE_ENCODING) |
b73bfc1c | 4312 | { |
41cbe562 KH |
4313 | code = CODING_INHIBIT_CHARACTER_SUBSTITUTION; |
4314 | charset = CHARSET_FROM_ID (charset_ascii); | |
b73bfc1c | 4315 | } |
41cbe562 | 4316 | else |
b73bfc1c | 4317 | { |
41cbe562 KH |
4318 | c = coding->default_char; |
4319 | charset = char_charset (c, charset_list, &code); | |
b73bfc1c | 4320 | } |
b73bfc1c | 4321 | } |
df7492f9 KH |
4322 | if (code == CHARSET_INVALID_CODE (charset)) |
4323 | abort (); | |
4324 | if (charset == charset_kanji) | |
4325 | { | |
4326 | int c1, c2; | |
4327 | JIS_TO_SJIS (code); | |
4328 | c1 = code >> 8, c2 = code & 0xFF; | |
4329 | EMIT_TWO_BYTES (c1, c2); | |
4330 | } | |
4331 | else if (charset == charset_kana) | |
4332 | EMIT_ONE_BYTE (code | 0x80); | |
57a47f8a KH |
4333 | else if (charset_kanji2 && charset == charset_kanji2) |
4334 | { | |
4335 | int c1, c2; | |
4336 | ||
4337 | c1 = code >> 8; | |
4338 | if (c1 == 0x21 || (c1 >= 0x23 && c1 < 0x25) | |
4339 | || (c1 >= 0x2C && c1 <= 0x2F) || c1 >= 0x6E) | |
4340 | { | |
4341 | JIS_TO_SJIS2 (code); | |
4342 | c1 = code >> 8, c2 = code & 0xFF; | |
4343 | EMIT_TWO_BYTES (c1, c2); | |
4344 | } | |
4345 | else | |
4346 | EMIT_ONE_ASCII_BYTE (code & 0x7F); | |
4347 | } | |
df7492f9 KH |
4348 | else |
4349 | EMIT_ONE_ASCII_BYTE (code & 0x7F); | |
4350 | } | |
4351 | } | |
065e3595 | 4352 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
4353 | coding->produced_char += produced_chars; |
4354 | coding->produced = dst - coding->destination; | |
4355 | return 0; | |
4356 | } | |
4357 | ||
4358 | static int | |
4359 | encode_coding_big5 (coding) | |
4360 | struct coding_system *coding; | |
4361 | { | |
4362 | int multibytep = coding->dst_multibyte; | |
4363 | int *charbuf = coding->charbuf; | |
4364 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4365 | unsigned char *dst = coding->destination + coding->produced; | |
4366 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4367 | int safe_room = 4; | |
4368 | int produced_chars = 0; | |
24a73b0a | 4369 | Lisp_Object attrs, charset_list, val; |
df7492f9 KH |
4370 | int ascii_compatible; |
4371 | struct charset *charset_roman, *charset_big5; | |
4372 | int c; | |
4373 | ||
24a73b0a | 4374 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 KH |
4375 | val = charset_list; |
4376 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
4377 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
4378 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); | |
4379 | ||
4380 | while (charbuf < charbuf_end) | |
4381 | { | |
4382 | ASSURE_DESTINATION (safe_room); | |
4383 | c = *charbuf++; | |
4384 | /* Now encode the character C. */ | |
4385 | if (ASCII_CHAR_P (c) && ascii_compatible) | |
4386 | EMIT_ONE_ASCII_BYTE (c); | |
16eafb5d KH |
4387 | else if (CHAR_BYTE8_P (c)) |
4388 | { | |
4389 | c = CHAR_TO_BYTE8 (c); | |
4390 | EMIT_ONE_BYTE (c); | |
b73bfc1c KH |
4391 | } |
4392 | else | |
4393 | { | |
df7492f9 KH |
4394 | unsigned code; |
4395 | struct charset *charset = char_charset (c, charset_list, &code); | |
4396 | ||
4397 | if (! charset) | |
b73bfc1c | 4398 | { |
41cbe562 | 4399 | if (coding->mode & CODING_MODE_SAFE_ENCODING) |
b73bfc1c | 4400 | { |
41cbe562 KH |
4401 | code = CODING_INHIBIT_CHARACTER_SUBSTITUTION; |
4402 | charset = CHARSET_FROM_ID (charset_ascii); | |
b73bfc1c | 4403 | } |
41cbe562 | 4404 | else |
0eecad43 | 4405 | { |
41cbe562 KH |
4406 | c = coding->default_char; |
4407 | charset = char_charset (c, charset_list, &code); | |
0eecad43 | 4408 | } |
4ed46869 | 4409 | } |
df7492f9 KH |
4410 | if (code == CHARSET_INVALID_CODE (charset)) |
4411 | abort (); | |
4412 | if (charset == charset_big5) | |
b73bfc1c | 4413 | { |
df7492f9 KH |
4414 | int c1, c2; |
4415 | ||
4416 | c1 = code >> 8, c2 = code & 0xFF; | |
4417 | EMIT_TWO_BYTES (c1, c2); | |
b73bfc1c | 4418 | } |
df7492f9 KH |
4419 | else |
4420 | EMIT_ONE_ASCII_BYTE (code & 0x7F); | |
4ed46869 | 4421 | } |
4ed46869 | 4422 | } |
065e3595 | 4423 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
4424 | coding->produced_char += produced_chars; |
4425 | coding->produced = dst - coding->destination; | |
4426 | return 0; | |
4ed46869 KH |
4427 | } |
4428 | ||
4429 | \f | |
df7492f9 | 4430 | /*** 10. CCL handlers ***/ |
1397dc18 KH |
4431 | |
4432 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
4433 | Check if a text is encoded in a coding system of which | |
4434 | encoder/decoder are written in CCL program. If it is, return | |
df7492f9 | 4435 | CATEGORY_MASK_CCL, else return 0. */ |
1397dc18 | 4436 | |
0a28aafb | 4437 | static int |
ff0dacd7 | 4438 | detect_coding_ccl (coding, detect_info) |
df7492f9 | 4439 | struct coding_system *coding; |
ff0dacd7 | 4440 | struct coding_detection_info *detect_info; |
1397dc18 | 4441 | { |
065e3595 | 4442 | const unsigned char *src = coding->source, *src_base; |
8f924df7 | 4443 | const unsigned char *src_end = coding->source + coding->src_bytes; |
df7492f9 KH |
4444 | int multibytep = coding->src_multibyte; |
4445 | int consumed_chars = 0; | |
4446 | int found = 0; | |
0e219d54 | 4447 | unsigned char *valids; |
df7492f9 KH |
4448 | int head_ascii = coding->head_ascii; |
4449 | Lisp_Object attrs; | |
4450 | ||
ff0dacd7 KH |
4451 | detect_info->checked |= CATEGORY_MASK_CCL; |
4452 | ||
df7492f9 | 4453 | coding = &coding_categories[coding_category_ccl]; |
0e219d54 | 4454 | valids = CODING_CCL_VALIDS (coding); |
df7492f9 KH |
4455 | attrs = CODING_ID_ATTRS (coding->id); |
4456 | if (! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
4457 | src += head_ascii; | |
1397dc18 | 4458 | |
b73bfc1c | 4459 | while (1) |
1397dc18 | 4460 | { |
df7492f9 | 4461 | int c; |
065e3595 KH |
4462 | |
4463 | src_base = src; | |
df7492f9 | 4464 | ONE_MORE_BYTE (c); |
065e3595 | 4465 | if (c < 0 || ! valids[c]) |
df7492f9 | 4466 | break; |
ff0dacd7 KH |
4467 | if ((valids[c] > 1)) |
4468 | found = CATEGORY_MASK_CCL; | |
df7492f9 | 4469 | } |
ff0dacd7 | 4470 | detect_info->rejected |= CATEGORY_MASK_CCL; |
df7492f9 KH |
4471 | return 0; |
4472 | ||
4473 | no_more_source: | |
ff0dacd7 KH |
4474 | detect_info->found |= found; |
4475 | return 1; | |
df7492f9 KH |
4476 | } |
4477 | ||
4478 | static void | |
4479 | decode_coding_ccl (coding) | |
4480 | struct coding_system *coding; | |
4481 | { | |
7c78e542 | 4482 | const unsigned char *src = coding->source + coding->consumed; |
8f924df7 | 4483 | const unsigned char *src_end = coding->source + coding->src_bytes; |
69a80ea3 KH |
4484 | int *charbuf = coding->charbuf + coding->charbuf_used; |
4485 | int *charbuf_end = coding->charbuf + coding->charbuf_size; | |
df7492f9 KH |
4486 | int consumed_chars = 0; |
4487 | int multibytep = coding->src_multibyte; | |
4488 | struct ccl_program ccl; | |
4489 | int source_charbuf[1024]; | |
4490 | int source_byteidx[1024]; | |
24a73b0a | 4491 | Lisp_Object attrs, charset_list; |
df7492f9 | 4492 | |
24a73b0a | 4493 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 KH |
4494 | setup_ccl_program (&ccl, CODING_CCL_DECODER (coding)); |
4495 | ||
4496 | while (src < src_end) | |
4497 | { | |
7c78e542 | 4498 | const unsigned char *p = src; |
df7492f9 KH |
4499 | int *source, *source_end; |
4500 | int i = 0; | |
4501 | ||
4502 | if (multibytep) | |
4503 | while (i < 1024 && p < src_end) | |
4504 | { | |
4505 | source_byteidx[i] = p - src; | |
4506 | source_charbuf[i++] = STRING_CHAR_ADVANCE (p); | |
4507 | } | |
4508 | else | |
4509 | while (i < 1024 && p < src_end) | |
4510 | source_charbuf[i++] = *p++; | |
8f924df7 | 4511 | |
df7492f9 KH |
4512 | if (p == src_end && coding->mode & CODING_MODE_LAST_BLOCK) |
4513 | ccl.last_block = 1; | |
4514 | ||
4515 | source = source_charbuf; | |
4516 | source_end = source + i; | |
4517 | while (source < source_end) | |
4518 | { | |
4519 | ccl_driver (&ccl, source, charbuf, | |
8dcbea82 KH |
4520 | source_end - source, charbuf_end - charbuf, |
4521 | charset_list); | |
df7492f9 KH |
4522 | source += ccl.consumed; |
4523 | charbuf += ccl.produced; | |
4524 | if (ccl.status != CCL_STAT_SUSPEND_BY_DST) | |
4525 | break; | |
4526 | } | |
4527 | if (source < source_end) | |
4528 | src += source_byteidx[source - source_charbuf]; | |
4529 | else | |
4530 | src = p; | |
4531 | consumed_chars += source - source_charbuf; | |
4532 | ||
4533 | if (ccl.status != CCL_STAT_SUSPEND_BY_SRC | |
4534 | && ccl.status != CODING_RESULT_INSUFFICIENT_SRC) | |
4535 | break; | |
4536 | } | |
4537 | ||
4538 | switch (ccl.status) | |
4539 | { | |
4540 | case CCL_STAT_SUSPEND_BY_SRC: | |
065e3595 | 4541 | record_conversion_result (coding, CODING_RESULT_INSUFFICIENT_SRC); |
df7492f9 KH |
4542 | break; |
4543 | case CCL_STAT_SUSPEND_BY_DST: | |
4544 | break; | |
4545 | case CCL_STAT_QUIT: | |
4546 | case CCL_STAT_INVALID_CMD: | |
065e3595 | 4547 | record_conversion_result (coding, CODING_RESULT_INTERRUPT); |
df7492f9 KH |
4548 | break; |
4549 | default: | |
065e3595 | 4550 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
4551 | break; |
4552 | } | |
4553 | coding->consumed_char += consumed_chars; | |
4554 | coding->consumed = src - coding->source; | |
4555 | coding->charbuf_used = charbuf - coding->charbuf; | |
4556 | } | |
4557 | ||
4558 | static int | |
4559 | encode_coding_ccl (coding) | |
4560 | struct coding_system *coding; | |
4561 | { | |
4562 | struct ccl_program ccl; | |
4563 | int multibytep = coding->dst_multibyte; | |
4564 | int *charbuf = coding->charbuf; | |
4565 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4566 | unsigned char *dst = coding->destination + coding->produced; | |
4567 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
df7492f9 KH |
4568 | int destination_charbuf[1024]; |
4569 | int i, produced_chars = 0; | |
24a73b0a | 4570 | Lisp_Object attrs, charset_list; |
df7492f9 | 4571 | |
24a73b0a | 4572 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 KH |
4573 | setup_ccl_program (&ccl, CODING_CCL_ENCODER (coding)); |
4574 | ||
4575 | ccl.last_block = coding->mode & CODING_MODE_LAST_BLOCK; | |
4576 | ccl.dst_multibyte = coding->dst_multibyte; | |
4577 | ||
8cffd3e7 | 4578 | while (charbuf < charbuf_end) |
df7492f9 | 4579 | { |
df7492f9 | 4580 | ccl_driver (&ccl, charbuf, destination_charbuf, |
8cffd3e7 | 4581 | charbuf_end - charbuf, 1024, charset_list); |
df7492f9 | 4582 | if (multibytep) |
8cffd3e7 KH |
4583 | { |
4584 | ASSURE_DESTINATION (ccl.produced * 2); | |
4585 | for (i = 0; i < ccl.produced; i++) | |
4586 | EMIT_ONE_BYTE (destination_charbuf[i] & 0xFF); | |
4587 | } | |
df7492f9 KH |
4588 | else |
4589 | { | |
8cffd3e7 | 4590 | ASSURE_DESTINATION (ccl.produced); |
df7492f9 KH |
4591 | for (i = 0; i < ccl.produced; i++) |
4592 | *dst++ = destination_charbuf[i] & 0xFF; | |
4593 | produced_chars += ccl.produced; | |
4594 | } | |
8cffd3e7 KH |
4595 | charbuf += ccl.consumed; |
4596 | if (ccl.status == CCL_STAT_QUIT | |
4597 | || ccl.status == CCL_STAT_INVALID_CMD) | |
4598 | break; | |
df7492f9 KH |
4599 | } |
4600 | ||
4601 | switch (ccl.status) | |
4602 | { | |
4603 | case CCL_STAT_SUSPEND_BY_SRC: | |
065e3595 | 4604 | record_conversion_result (coding, CODING_RESULT_INSUFFICIENT_SRC); |
df7492f9 KH |
4605 | break; |
4606 | case CCL_STAT_SUSPEND_BY_DST: | |
065e3595 | 4607 | record_conversion_result (coding, CODING_RESULT_INSUFFICIENT_DST); |
df7492f9 KH |
4608 | break; |
4609 | case CCL_STAT_QUIT: | |
4610 | case CCL_STAT_INVALID_CMD: | |
065e3595 | 4611 | record_conversion_result (coding, CODING_RESULT_INTERRUPT); |
df7492f9 KH |
4612 | break; |
4613 | default: | |
065e3595 | 4614 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 | 4615 | break; |
1397dc18 | 4616 | } |
df7492f9 KH |
4617 | |
4618 | coding->produced_char += produced_chars; | |
4619 | coding->produced = dst - coding->destination; | |
4620 | return 0; | |
1397dc18 KH |
4621 | } |
4622 | ||
df7492f9 | 4623 | |
1397dc18 | 4624 | \f |
df7492f9 | 4625 | /*** 10, 11. no-conversion handlers ***/ |
4ed46869 | 4626 | |
b73bfc1c | 4627 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
4ed46869 | 4628 | |
b73bfc1c | 4629 | static void |
df7492f9 | 4630 | decode_coding_raw_text (coding) |
4ed46869 | 4631 | struct coding_system *coding; |
4ed46869 | 4632 | { |
df7492f9 | 4633 | coding->chars_at_source = 1; |
2c78b7e1 KH |
4634 | coding->consumed_char = 0; |
4635 | coding->consumed = 0; | |
065e3595 | 4636 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 | 4637 | } |
4ed46869 | 4638 | |
df7492f9 KH |
4639 | static int |
4640 | encode_coding_raw_text (coding) | |
4641 | struct coding_system *coding; | |
4642 | { | |
4643 | int multibytep = coding->dst_multibyte; | |
4644 | int *charbuf = coding->charbuf; | |
4645 | int *charbuf_end = coding->charbuf + coding->charbuf_used; | |
4646 | unsigned char *dst = coding->destination + coding->produced; | |
4647 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4648 | int produced_chars = 0; | |
b73bfc1c KH |
4649 | int c; |
4650 | ||
df7492f9 | 4651 | if (multibytep) |
b73bfc1c | 4652 | { |
df7492f9 | 4653 | int safe_room = MAX_MULTIBYTE_LENGTH * 2; |
4ed46869 | 4654 | |
df7492f9 KH |
4655 | if (coding->src_multibyte) |
4656 | while (charbuf < charbuf_end) | |
4657 | { | |
4658 | ASSURE_DESTINATION (safe_room); | |
4659 | c = *charbuf++; | |
4660 | if (ASCII_CHAR_P (c)) | |
4661 | EMIT_ONE_ASCII_BYTE (c); | |
4662 | else if (CHAR_BYTE8_P (c)) | |
4663 | { | |
4664 | c = CHAR_TO_BYTE8 (c); | |
4665 | EMIT_ONE_BYTE (c); | |
4666 | } | |
4667 | else | |
4668 | { | |
4669 | unsigned char str[MAX_MULTIBYTE_LENGTH], *p0 = str, *p1 = str; | |
93dec019 | 4670 | |
df7492f9 KH |
4671 | CHAR_STRING_ADVANCE (c, p1); |
4672 | while (p0 < p1) | |
9d123124 KH |
4673 | { |
4674 | EMIT_ONE_BYTE (*p0); | |
4675 | p0++; | |
4676 | } | |
df7492f9 KH |
4677 | } |
4678 | } | |
b73bfc1c | 4679 | else |
df7492f9 KH |
4680 | while (charbuf < charbuf_end) |
4681 | { | |
4682 | ASSURE_DESTINATION (safe_room); | |
4683 | c = *charbuf++; | |
4684 | EMIT_ONE_BYTE (c); | |
4685 | } | |
4686 | } | |
4687 | else | |
4ed46869 | 4688 | { |
df7492f9 | 4689 | if (coding->src_multibyte) |
d46c5b12 | 4690 | { |
df7492f9 KH |
4691 | int safe_room = MAX_MULTIBYTE_LENGTH; |
4692 | ||
4693 | while (charbuf < charbuf_end) | |
d46c5b12 | 4694 | { |
df7492f9 KH |
4695 | ASSURE_DESTINATION (safe_room); |
4696 | c = *charbuf++; | |
4697 | if (ASCII_CHAR_P (c)) | |
4698 | *dst++ = c; | |
4699 | else if (CHAR_BYTE8_P (c)) | |
4700 | *dst++ = CHAR_TO_BYTE8 (c); | |
b73bfc1c | 4701 | else |
df7492f9 KH |
4702 | CHAR_STRING_ADVANCE (c, dst); |
4703 | produced_chars++; | |
d46c5b12 KH |
4704 | } |
4705 | } | |
df7492f9 KH |
4706 | else |
4707 | { | |
4708 | ASSURE_DESTINATION (charbuf_end - charbuf); | |
4709 | while (charbuf < charbuf_end && dst < dst_end) | |
4710 | *dst++ = *charbuf++; | |
4711 | produced_chars = dst - (coding->destination + coding->dst_bytes); | |
8f924df7 | 4712 | } |
4ed46869 | 4713 | } |
065e3595 | 4714 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
4715 | coding->produced_char += produced_chars; |
4716 | coding->produced = dst - coding->destination; | |
4717 | return 0; | |
4ed46869 KH |
4718 | } |
4719 | ||
ff0dacd7 KH |
4720 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
4721 | Check if a text is encoded in a charset-based coding system. If it | |
4722 | is, return 1, else return 0. */ | |
4723 | ||
0a28aafb | 4724 | static int |
ff0dacd7 | 4725 | detect_coding_charset (coding, detect_info) |
df7492f9 | 4726 | struct coding_system *coding; |
ff0dacd7 | 4727 | struct coding_detection_info *detect_info; |
1397dc18 | 4728 | { |
065e3595 | 4729 | const unsigned char *src = coding->source, *src_base; |
8f924df7 | 4730 | const unsigned char *src_end = coding->source + coding->src_bytes; |
df7492f9 KH |
4731 | int multibytep = coding->src_multibyte; |
4732 | int consumed_chars = 0; | |
4733 | Lisp_Object attrs, valids; | |
584948ac | 4734 | int found = 0; |
716b3fa0 | 4735 | int head_ascii = coding->head_ascii; |
1397dc18 | 4736 | |
ff0dacd7 KH |
4737 | detect_info->checked |= CATEGORY_MASK_CHARSET; |
4738 | ||
df7492f9 KH |
4739 | coding = &coding_categories[coding_category_charset]; |
4740 | attrs = CODING_ID_ATTRS (coding->id); | |
4741 | valids = AREF (attrs, coding_attr_charset_valids); | |
4742 | ||
4743 | if (! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
716b3fa0 | 4744 | src += head_ascii; |
1397dc18 | 4745 | |
b73bfc1c | 4746 | while (1) |
1397dc18 | 4747 | { |
df7492f9 | 4748 | int c; |
716b3fa0 KH |
4749 | Lisp_Object val; |
4750 | struct charset *charset; | |
4751 | int dim, idx; | |
1397dc18 | 4752 | |
065e3595 | 4753 | src_base = src; |
df7492f9 | 4754 | ONE_MORE_BYTE (c); |
065e3595 KH |
4755 | if (c < 0) |
4756 | continue; | |
716b3fa0 KH |
4757 | val = AREF (valids, c); |
4758 | if (NILP (val)) | |
df7492f9 | 4759 | break; |
584948ac | 4760 | if (c >= 0x80) |
ff0dacd7 | 4761 | found = CATEGORY_MASK_CHARSET; |
716b3fa0 KH |
4762 | if (INTEGERP (val)) |
4763 | { | |
4764 | charset = CHARSET_FROM_ID (XFASTINT (val)); | |
4765 | dim = CHARSET_DIMENSION (charset); | |
4766 | for (idx = 1; idx < dim; idx++) | |
4767 | { | |
4768 | if (src == src_end) | |
4769 | goto too_short; | |
4770 | ONE_MORE_BYTE (c); | |
4771 | if (c < charset->code_space[(dim - 1 - idx) * 2] | |
4772 | || c > charset->code_space[(dim - 1 - idx) * 2 + 1]) | |
4773 | break; | |
4774 | } | |
4775 | if (idx < dim) | |
4776 | break; | |
4777 | } | |
4778 | else | |
4779 | { | |
4780 | idx = 1; | |
4781 | for (; CONSP (val); val = XCDR (val)) | |
4782 | { | |
4783 | charset = CHARSET_FROM_ID (XFASTINT (XCAR (val))); | |
4784 | dim = CHARSET_DIMENSION (charset); | |
4785 | while (idx < dim) | |
4786 | { | |
4787 | if (src == src_end) | |
4788 | goto too_short; | |
4789 | ONE_MORE_BYTE (c); | |
4790 | if (c < charset->code_space[(dim - 1 - idx) * 4] | |
4791 | || c > charset->code_space[(dim - 1 - idx) * 4 + 1]) | |
4792 | break; | |
4793 | idx++; | |
4794 | } | |
4795 | if (idx == dim) | |
4796 | { | |
4797 | val = Qnil; | |
4798 | break; | |
4799 | } | |
4800 | } | |
4801 | if (CONSP (val)) | |
4802 | break; | |
4803 | } | |
df7492f9 | 4804 | } |
716b3fa0 | 4805 | too_short: |
ff0dacd7 | 4806 | detect_info->rejected |= CATEGORY_MASK_CHARSET; |
df7492f9 | 4807 | return 0; |
4ed46869 | 4808 | |
df7492f9 | 4809 | no_more_source: |
ff0dacd7 KH |
4810 | detect_info->found |= found; |
4811 | return 1; | |
df7492f9 | 4812 | } |
b73bfc1c | 4813 | |
b73bfc1c | 4814 | static void |
df7492f9 | 4815 | decode_coding_charset (coding) |
4ed46869 | 4816 | struct coding_system *coding; |
4ed46869 | 4817 | { |
8f924df7 KH |
4818 | const unsigned char *src = coding->source + coding->consumed; |
4819 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
4820 | const unsigned char *src_base; | |
69a80ea3 KH |
4821 | int *charbuf = coding->charbuf + coding->charbuf_used; |
4822 | int *charbuf_end | |
4823 | = coding->charbuf + coding->charbuf_size - MAX_ANNOTATION_LENGTH; | |
df7492f9 KH |
4824 | int consumed_chars = 0, consumed_chars_base; |
4825 | int multibytep = coding->src_multibyte; | |
24a73b0a | 4826 | Lisp_Object attrs, charset_list, valids; |
ff0dacd7 KH |
4827 | int char_offset = coding->produced_char; |
4828 | int last_offset = char_offset; | |
4829 | int last_id = charset_ascii; | |
df7492f9 | 4830 | |
24a73b0a | 4831 | CODING_GET_INFO (coding, attrs, charset_list); |
4eb6d3f1 | 4832 | valids = AREF (attrs, coding_attr_charset_valids); |
b73bfc1c | 4833 | |
df7492f9 | 4834 | while (1) |
4ed46869 | 4835 | { |
4eb6d3f1 | 4836 | int c; |
24a73b0a KH |
4837 | Lisp_Object val; |
4838 | struct charset *charset; | |
4839 | int dim; | |
4840 | int len = 1; | |
4841 | unsigned code; | |
df7492f9 KH |
4842 | |
4843 | src_base = src; | |
4844 | consumed_chars_base = consumed_chars; | |
b73bfc1c | 4845 | |
df7492f9 KH |
4846 | if (charbuf >= charbuf_end) |
4847 | break; | |
4848 | ||
4eb6d3f1 | 4849 | ONE_MORE_BYTE (c); |
065e3595 KH |
4850 | if (c < 0) |
4851 | goto invalid_code; | |
24a73b0a KH |
4852 | code = c; |
4853 | ||
4854 | val = AREF (valids, c); | |
4855 | if (NILP (val)) | |
4856 | goto invalid_code; | |
4857 | if (INTEGERP (val)) | |
d46c5b12 | 4858 | { |
24a73b0a KH |
4859 | charset = CHARSET_FROM_ID (XFASTINT (val)); |
4860 | dim = CHARSET_DIMENSION (charset); | |
4861 | while (len < dim) | |
b73bfc1c | 4862 | { |
24a73b0a KH |
4863 | ONE_MORE_BYTE (c); |
4864 | code = (code << 8) | c; | |
4865 | len++; | |
b73bfc1c | 4866 | } |
24a73b0a KH |
4867 | CODING_DECODE_CHAR (coding, src, src_base, src_end, |
4868 | charset, code, c); | |
d46c5b12 | 4869 | } |
df7492f9 | 4870 | else |
d46c5b12 | 4871 | { |
24a73b0a KH |
4872 | /* VAL is a list of charset IDs. It is assured that the |
4873 | list is sorted by charset dimensions (smaller one | |
4874 | comes first). */ | |
4875 | while (CONSP (val)) | |
4eb6d3f1 | 4876 | { |
24a73b0a | 4877 | charset = CHARSET_FROM_ID (XFASTINT (XCAR (val))); |
c7c66a95 | 4878 | dim = CHARSET_DIMENSION (charset); |
f9d71dcd | 4879 | while (len < dim) |
4eb6d3f1 | 4880 | { |
acb2a965 KH |
4881 | ONE_MORE_BYTE (c); |
4882 | code = (code << 8) | c; | |
f9d71dcd | 4883 | len++; |
4eb6d3f1 | 4884 | } |
24a73b0a KH |
4885 | CODING_DECODE_CHAR (coding, src, src_base, |
4886 | src_end, charset, code, c); | |
4887 | if (c >= 0) | |
4888 | break; | |
4889 | val = XCDR (val); | |
ff0dacd7 | 4890 | } |
d46c5b12 | 4891 | } |
24a73b0a KH |
4892 | if (c < 0) |
4893 | goto invalid_code; | |
4894 | if (charset->id != charset_ascii | |
4895 | && last_id != charset->id) | |
4896 | { | |
4897 | if (last_id != charset_ascii) | |
69a80ea3 | 4898 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
24a73b0a KH |
4899 | last_id = charset->id; |
4900 | last_offset = char_offset; | |
4901 | } | |
4902 | ||
df7492f9 | 4903 | *charbuf++ = c; |
ff0dacd7 | 4904 | char_offset++; |
df7492f9 KH |
4905 | continue; |
4906 | ||
4907 | invalid_code: | |
4908 | src = src_base; | |
4909 | consumed_chars = consumed_chars_base; | |
4910 | ONE_MORE_BYTE (c); | |
065e3595 | 4911 | *charbuf++ = c < 0 ? -c : ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); |
ff0dacd7 | 4912 | char_offset++; |
df7492f9 | 4913 | coding->errors++; |
4ed46869 KH |
4914 | } |
4915 | ||
df7492f9 | 4916 | no_more_source: |
ff0dacd7 | 4917 | if (last_id != charset_ascii) |
69a80ea3 | 4918 | ADD_CHARSET_DATA (charbuf, char_offset - last_offset, last_id); |
df7492f9 KH |
4919 | coding->consumed_char += consumed_chars_base; |
4920 | coding->consumed = src_base - coding->source; | |
4921 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
4922 | } |
4923 | ||
df7492f9 KH |
4924 | static int |
4925 | encode_coding_charset (coding) | |
4ed46869 | 4926 | struct coding_system *coding; |
4ed46869 | 4927 | { |
df7492f9 KH |
4928 | int multibytep = coding->dst_multibyte; |
4929 | int *charbuf = coding->charbuf; | |
4930 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4931 | unsigned char *dst = coding->destination + coding->produced; | |
4932 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4933 | int safe_room = MAX_MULTIBYTE_LENGTH; | |
4934 | int produced_chars = 0; | |
24a73b0a | 4935 | Lisp_Object attrs, charset_list; |
df7492f9 | 4936 | int ascii_compatible; |
b73bfc1c | 4937 | int c; |
b73bfc1c | 4938 | |
24a73b0a | 4939 | CODING_GET_INFO (coding, attrs, charset_list); |
df7492f9 | 4940 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); |
fb88bf2d | 4941 | |
df7492f9 | 4942 | while (charbuf < charbuf_end) |
4ed46869 | 4943 | { |
4eb6d3f1 | 4944 | struct charset *charset; |
df7492f9 | 4945 | unsigned code; |
8f924df7 | 4946 | |
df7492f9 KH |
4947 | ASSURE_DESTINATION (safe_room); |
4948 | c = *charbuf++; | |
4949 | if (ascii_compatible && ASCII_CHAR_P (c)) | |
4950 | EMIT_ONE_ASCII_BYTE (c); | |
16eafb5d | 4951 | else if (CHAR_BYTE8_P (c)) |
4ed46869 | 4952 | { |
16eafb5d KH |
4953 | c = CHAR_TO_BYTE8 (c); |
4954 | EMIT_ONE_BYTE (c); | |
d46c5b12 | 4955 | } |
d46c5b12 | 4956 | else |
b73bfc1c | 4957 | { |
4eb6d3f1 KH |
4958 | charset = char_charset (c, charset_list, &code); |
4959 | if (charset) | |
4960 | { | |
4961 | if (CHARSET_DIMENSION (charset) == 1) | |
4962 | EMIT_ONE_BYTE (code); | |
4963 | else if (CHARSET_DIMENSION (charset) == 2) | |
4964 | EMIT_TWO_BYTES (code >> 8, code & 0xFF); | |
4965 | else if (CHARSET_DIMENSION (charset) == 3) | |
4966 | EMIT_THREE_BYTES (code >> 16, (code >> 8) & 0xFF, code & 0xFF); | |
4967 | else | |
4968 | EMIT_FOUR_BYTES (code >> 24, (code >> 16) & 0xFF, | |
4969 | (code >> 8) & 0xFF, code & 0xFF); | |
4970 | } | |
4971 | else | |
41cbe562 KH |
4972 | { |
4973 | if (coding->mode & CODING_MODE_SAFE_ENCODING) | |
4974 | c = CODING_INHIBIT_CHARACTER_SUBSTITUTION; | |
4975 | else | |
4976 | c = coding->default_char; | |
4977 | EMIT_ONE_BYTE (c); | |
4978 | } | |
4ed46869 | 4979 | } |
4ed46869 KH |
4980 | } |
4981 | ||
065e3595 | 4982 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 KH |
4983 | coding->produced_char += produced_chars; |
4984 | coding->produced = dst - coding->destination; | |
4985 | return 0; | |
4ed46869 KH |
4986 | } |
4987 | ||
4988 | \f | |
1397dc18 | 4989 | /*** 7. C library functions ***/ |
4ed46869 | 4990 | |
df7492f9 KH |
4991 | /* Setup coding context CODING from information about CODING_SYSTEM. |
4992 | If CODING_SYSTEM is nil, `no-conversion' is assumed. If | |
4993 | CODING_SYSTEM is invalid, signal an error. */ | |
4ed46869 | 4994 | |
ec6d2bb8 | 4995 | void |
e0e989f6 KH |
4996 | setup_coding_system (coding_system, coding) |
4997 | Lisp_Object coding_system; | |
4ed46869 KH |
4998 | struct coding_system *coding; |
4999 | { | |
df7492f9 KH |
5000 | Lisp_Object attrs; |
5001 | Lisp_Object eol_type; | |
5002 | Lisp_Object coding_type; | |
4608c386 | 5003 | Lisp_Object val; |
4ed46869 | 5004 | |
df7492f9 | 5005 | if (NILP (coding_system)) |
ae6f73fa | 5006 | coding_system = Qundecided; |
c07c8e12 | 5007 | |
df7492f9 | 5008 | CHECK_CODING_SYSTEM_GET_ID (coding_system, coding->id); |
1f5dbf34 | 5009 | |
df7492f9 KH |
5010 | attrs = CODING_ID_ATTRS (coding->id); |
5011 | eol_type = CODING_ID_EOL_TYPE (coding->id); | |
1f5dbf34 | 5012 | |
df7492f9 KH |
5013 | coding->mode = 0; |
5014 | coding->head_ascii = -1; | |
4a015c45 KH |
5015 | if (VECTORP (eol_type)) |
5016 | coding->common_flags = (CODING_REQUIRE_DECODING_MASK | |
5017 | | CODING_REQUIRE_DETECTION_MASK); | |
5018 | else if (! EQ (eol_type, Qunix)) | |
5019 | coding->common_flags = (CODING_REQUIRE_DECODING_MASK | |
5020 | | CODING_REQUIRE_ENCODING_MASK); | |
5021 | else | |
5022 | coding->common_flags = 0; | |
5e5c78be KH |
5023 | if (! NILP (CODING_ATTR_POST_READ (attrs))) |
5024 | coding->common_flags |= CODING_REQUIRE_DECODING_MASK; | |
5025 | if (! NILP (CODING_ATTR_PRE_WRITE (attrs))) | |
5026 | coding->common_flags |= CODING_REQUIRE_ENCODING_MASK; | |
8f924df7 KH |
5027 | if (! NILP (CODING_ATTR_FOR_UNIBYTE (attrs))) |
5028 | coding->common_flags |= CODING_FOR_UNIBYTE_MASK; | |
1f5dbf34 | 5029 | |
df7492f9 | 5030 | val = CODING_ATTR_SAFE_CHARSETS (attrs); |
8f924df7 KH |
5031 | coding->max_charset_id = SCHARS (val) - 1; |
5032 | coding->safe_charsets = (char *) SDATA (val); | |
df7492f9 | 5033 | coding->default_char = XINT (CODING_ATTR_DEFAULT_CHAR (attrs)); |
4608c386 | 5034 | |
df7492f9 KH |
5035 | coding_type = CODING_ATTR_TYPE (attrs); |
5036 | if (EQ (coding_type, Qundecided)) | |
d46c5b12 | 5037 | { |
df7492f9 KH |
5038 | coding->detector = NULL; |
5039 | coding->decoder = decode_coding_raw_text; | |
5040 | coding->encoder = encode_coding_raw_text; | |
5041 | coding->common_flags |= CODING_REQUIRE_DETECTION_MASK; | |
d46c5b12 | 5042 | } |
df7492f9 | 5043 | else if (EQ (coding_type, Qiso_2022)) |
d46c5b12 | 5044 | { |
df7492f9 KH |
5045 | int i; |
5046 | int flags = XINT (AREF (attrs, coding_attr_iso_flags)); | |
5047 | ||
5048 | /* Invoke graphic register 0 to plane 0. */ | |
5049 | CODING_ISO_INVOCATION (coding, 0) = 0; | |
5050 | /* Invoke graphic register 1 to plane 1 if we can use 8-bit. */ | |
5051 | CODING_ISO_INVOCATION (coding, 1) | |
5052 | = (flags & CODING_ISO_FLAG_SEVEN_BITS ? -1 : 1); | |
5053 | /* Setup the initial status of designation. */ | |
5054 | for (i = 0; i < 4; i++) | |
5055 | CODING_ISO_DESIGNATION (coding, i) = CODING_ISO_INITIAL (coding, i); | |
5056 | /* Not single shifting initially. */ | |
5057 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; | |
5058 | /* Beginning of buffer should also be regarded as bol. */ | |
5059 | CODING_ISO_BOL (coding) = 1; | |
5060 | coding->detector = detect_coding_iso_2022; | |
5061 | coding->decoder = decode_coding_iso_2022; | |
5062 | coding->encoder = encode_coding_iso_2022; | |
5063 | if (flags & CODING_ISO_FLAG_SAFE) | |
5064 | coding->mode |= CODING_MODE_SAFE_ENCODING; | |
d46c5b12 | 5065 | coding->common_flags |
df7492f9 KH |
5066 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK |
5067 | | CODING_REQUIRE_FLUSHING_MASK); | |
5068 | if (flags & CODING_ISO_FLAG_COMPOSITION) | |
5069 | coding->common_flags |= CODING_ANNOTATE_COMPOSITION_MASK; | |
ff0dacd7 KH |
5070 | if (flags & CODING_ISO_FLAG_DESIGNATION) |
5071 | coding->common_flags |= CODING_ANNOTATE_CHARSET_MASK; | |
df7492f9 KH |
5072 | if (flags & CODING_ISO_FLAG_FULL_SUPPORT) |
5073 | { | |
5074 | setup_iso_safe_charsets (attrs); | |
5075 | val = CODING_ATTR_SAFE_CHARSETS (attrs); | |
8f924df7 KH |
5076 | coding->max_charset_id = SCHARS (val) - 1; |
5077 | coding->safe_charsets = (char *) SDATA (val); | |
df7492f9 KH |
5078 | } |
5079 | CODING_ISO_FLAGS (coding) = flags; | |
d46c5b12 | 5080 | } |
df7492f9 | 5081 | else if (EQ (coding_type, Qcharset)) |
d46c5b12 | 5082 | { |
df7492f9 KH |
5083 | coding->detector = detect_coding_charset; |
5084 | coding->decoder = decode_coding_charset; | |
5085 | coding->encoder = encode_coding_charset; | |
d46c5b12 | 5086 | coding->common_flags |
df7492f9 | 5087 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); |
d46c5b12 | 5088 | } |
df7492f9 | 5089 | else if (EQ (coding_type, Qutf_8)) |
d46c5b12 | 5090 | { |
df7492f9 KH |
5091 | coding->detector = detect_coding_utf_8; |
5092 | coding->decoder = decode_coding_utf_8; | |
5093 | coding->encoder = encode_coding_utf_8; | |
5094 | coding->common_flags | |
5095 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
5096 | } | |
5097 | else if (EQ (coding_type, Qutf_16)) | |
5098 | { | |
5099 | val = AREF (attrs, coding_attr_utf_16_bom); | |
5100 | CODING_UTF_16_BOM (coding) = (CONSP (val) ? utf_16_detect_bom | |
5101 | : EQ (val, Qt) ? utf_16_with_bom | |
5102 | : utf_16_without_bom); | |
5103 | val = AREF (attrs, coding_attr_utf_16_endian); | |
b49a1807 | 5104 | CODING_UTF_16_ENDIAN (coding) = (EQ (val, Qbig) ? utf_16_big_endian |
df7492f9 | 5105 | : utf_16_little_endian); |
e19c3639 | 5106 | CODING_UTF_16_SURROGATE (coding) = 0; |
df7492f9 KH |
5107 | coding->detector = detect_coding_utf_16; |
5108 | coding->decoder = decode_coding_utf_16; | |
5109 | coding->encoder = encode_coding_utf_16; | |
5110 | coding->common_flags | |
5111 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
b49a1807 KH |
5112 | if (CODING_UTF_16_BOM (coding) == utf_16_detect_bom) |
5113 | coding->common_flags |= CODING_REQUIRE_DETECTION_MASK; | |
d46c5b12 | 5114 | } |
df7492f9 | 5115 | else if (EQ (coding_type, Qccl)) |
4ed46869 | 5116 | { |
df7492f9 KH |
5117 | coding->detector = detect_coding_ccl; |
5118 | coding->decoder = decode_coding_ccl; | |
5119 | coding->encoder = encode_coding_ccl; | |
c952af22 | 5120 | coding->common_flags |
df7492f9 KH |
5121 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK |
5122 | | CODING_REQUIRE_FLUSHING_MASK); | |
5123 | } | |
5124 | else if (EQ (coding_type, Qemacs_mule)) | |
5125 | { | |
5126 | coding->detector = detect_coding_emacs_mule; | |
5127 | coding->decoder = decode_coding_emacs_mule; | |
5128 | coding->encoder = encode_coding_emacs_mule; | |
c952af22 | 5129 | coding->common_flags |
df7492f9 KH |
5130 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); |
5131 | if (! NILP (AREF (attrs, coding_attr_emacs_mule_full)) | |
5132 | && ! EQ (CODING_ATTR_CHARSET_LIST (attrs), Vemacs_mule_charset_list)) | |
5133 | { | |
5134 | Lisp_Object tail, safe_charsets; | |
5135 | int max_charset_id = 0; | |
5136 | ||
5137 | for (tail = Vemacs_mule_charset_list; CONSP (tail); | |
5138 | tail = XCDR (tail)) | |
5139 | if (max_charset_id < XFASTINT (XCAR (tail))) | |
5140 | max_charset_id = XFASTINT (XCAR (tail)); | |
5141 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), | |
5142 | make_number (255)); | |
5143 | for (tail = Vemacs_mule_charset_list; CONSP (tail); | |
5144 | tail = XCDR (tail)) | |
8f924df7 | 5145 | SSET (safe_charsets, XFASTINT (XCAR (tail)), 0); |
df7492f9 | 5146 | coding->max_charset_id = max_charset_id; |
8f924df7 | 5147 | coding->safe_charsets = (char *) SDATA (safe_charsets); |
df7492f9 KH |
5148 | } |
5149 | } | |
5150 | else if (EQ (coding_type, Qshift_jis)) | |
5151 | { | |
5152 | coding->detector = detect_coding_sjis; | |
5153 | coding->decoder = decode_coding_sjis; | |
5154 | coding->encoder = encode_coding_sjis; | |
c952af22 | 5155 | coding->common_flags |
df7492f9 KH |
5156 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); |
5157 | } | |
5158 | else if (EQ (coding_type, Qbig5)) | |
5159 | { | |
5160 | coding->detector = detect_coding_big5; | |
5161 | coding->decoder = decode_coding_big5; | |
5162 | coding->encoder = encode_coding_big5; | |
c952af22 | 5163 | coding->common_flags |
df7492f9 KH |
5164 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); |
5165 | } | |
5166 | else /* EQ (coding_type, Qraw_text) */ | |
ec6d2bb8 | 5167 | { |
df7492f9 KH |
5168 | coding->detector = NULL; |
5169 | coding->decoder = decode_coding_raw_text; | |
5170 | coding->encoder = encode_coding_raw_text; | |
ea29edf2 KH |
5171 | if (! EQ (eol_type, Qunix)) |
5172 | { | |
5173 | coding->common_flags |= CODING_REQUIRE_DECODING_MASK; | |
5174 | if (! VECTORP (eol_type)) | |
5175 | coding->common_flags |= CODING_REQUIRE_ENCODING_MASK; | |
5176 | } | |
5177 | ||
4ed46869 | 5178 | } |
4ed46869 | 5179 | |
df7492f9 | 5180 | return; |
4ed46869 KH |
5181 | } |
5182 | ||
0ff61e78 KH |
5183 | /* Return a list of charsets supported by CODING. */ |
5184 | ||
5185 | Lisp_Object | |
5186 | coding_charset_list (coding) | |
5187 | struct coding_system *coding; | |
5188 | { | |
35befdaa | 5189 | Lisp_Object attrs, charset_list; |
0ff61e78 KH |
5190 | |
5191 | CODING_GET_INFO (coding, attrs, charset_list); | |
5192 | if (EQ (CODING_ATTR_TYPE (attrs), Qiso_2022)) | |
5193 | { | |
5194 | int flags = XINT (AREF (attrs, coding_attr_iso_flags)); | |
5195 | ||
5196 | if (flags & CODING_ISO_FLAG_FULL_SUPPORT) | |
5197 | charset_list = Viso_2022_charset_list; | |
5198 | } | |
5199 | else if (EQ (CODING_ATTR_TYPE (attrs), Qemacs_mule)) | |
5200 | { | |
5201 | charset_list = Vemacs_mule_charset_list; | |
5202 | } | |
5203 | return charset_list; | |
5204 | } | |
5205 | ||
5206 | ||
df7492f9 KH |
5207 | /* Return raw-text or one of its subsidiaries that has the same |
5208 | eol_type as CODING-SYSTEM. */ | |
ec6d2bb8 | 5209 | |
df7492f9 KH |
5210 | Lisp_Object |
5211 | raw_text_coding_system (coding_system) | |
5212 | Lisp_Object coding_system; | |
ec6d2bb8 | 5213 | { |
0be8721c | 5214 | Lisp_Object spec, attrs; |
df7492f9 | 5215 | Lisp_Object eol_type, raw_text_eol_type; |
ec6d2bb8 | 5216 | |
d3e4cb56 KH |
5217 | if (NILP (coding_system)) |
5218 | return Qraw_text; | |
df7492f9 KH |
5219 | spec = CODING_SYSTEM_SPEC (coding_system); |
5220 | attrs = AREF (spec, 0); | |
ec6d2bb8 | 5221 | |
df7492f9 KH |
5222 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) |
5223 | return coding_system; | |
ec6d2bb8 | 5224 | |
df7492f9 KH |
5225 | eol_type = AREF (spec, 2); |
5226 | if (VECTORP (eol_type)) | |
5227 | return Qraw_text; | |
5228 | spec = CODING_SYSTEM_SPEC (Qraw_text); | |
5229 | raw_text_eol_type = AREF (spec, 2); | |
5230 | return (EQ (eol_type, Qunix) ? AREF (raw_text_eol_type, 0) | |
5231 | : EQ (eol_type, Qdos) ? AREF (raw_text_eol_type, 1) | |
5232 | : AREF (raw_text_eol_type, 2)); | |
ec6d2bb8 KH |
5233 | } |
5234 | ||
54f78171 | 5235 | |
df7492f9 KH |
5236 | /* If CODING_SYSTEM doesn't specify end-of-line format but PARENT |
5237 | does, return one of the subsidiary that has the same eol-spec as | |
fcbcfb64 KH |
5238 | PARENT. Otherwise, return CODING_SYSTEM. If PARENT is nil, |
5239 | inherit end-of-line format from the system's setting | |
5240 | (system_eol_type). */ | |
df7492f9 KH |
5241 | |
5242 | Lisp_Object | |
5243 | coding_inherit_eol_type (coding_system, parent) | |
b74e4686 | 5244 | Lisp_Object coding_system, parent; |
54f78171 | 5245 | { |
3e139625 | 5246 | Lisp_Object spec, eol_type; |
54f78171 | 5247 | |
d3e4cb56 KH |
5248 | if (NILP (coding_system)) |
5249 | coding_system = Qraw_text; | |
df7492f9 | 5250 | spec = CODING_SYSTEM_SPEC (coding_system); |
df7492f9 | 5251 | eol_type = AREF (spec, 2); |
fcbcfb64 | 5252 | if (VECTORP (eol_type)) |
df7492f9 | 5253 | { |
df7492f9 KH |
5254 | Lisp_Object parent_eol_type; |
5255 | ||
fcbcfb64 KH |
5256 | if (! NILP (parent)) |
5257 | { | |
5258 | Lisp_Object parent_spec; | |
5259 | ||
4a015c45 | 5260 | parent_spec = CODING_SYSTEM_SPEC (parent); |
fcbcfb64 KH |
5261 | parent_eol_type = AREF (parent_spec, 2); |
5262 | } | |
5263 | else | |
5264 | parent_eol_type = system_eol_type; | |
df7492f9 KH |
5265 | if (EQ (parent_eol_type, Qunix)) |
5266 | coding_system = AREF (eol_type, 0); | |
5267 | else if (EQ (parent_eol_type, Qdos)) | |
5268 | coding_system = AREF (eol_type, 1); | |
5269 | else if (EQ (parent_eol_type, Qmac)) | |
5270 | coding_system = AREF (eol_type, 2); | |
54f78171 | 5271 | } |
df7492f9 | 5272 | return coding_system; |
54f78171 KH |
5273 | } |
5274 | ||
4ed46869 KH |
5275 | /* Emacs has a mechanism to automatically detect a coding system if it |
5276 | is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But, | |
5277 | it's impossible to distinguish some coding systems accurately | |
5278 | because they use the same range of codes. So, at first, coding | |
5279 | systems are categorized into 7, those are: | |
5280 | ||
0ef69138 | 5281 | o coding-category-emacs-mule |
4ed46869 KH |
5282 | |
5283 | The category for a coding system which has the same code range | |
5284 | as Emacs' internal format. Assigned the coding-system (Lisp | |
0ef69138 | 5285 | symbol) `emacs-mule' by default. |
4ed46869 KH |
5286 | |
5287 | o coding-category-sjis | |
5288 | ||
5289 | The category for a coding system which has the same code range | |
5290 | as SJIS. Assigned the coding-system (Lisp | |
7717c392 | 5291 | symbol) `japanese-shift-jis' by default. |
4ed46869 KH |
5292 | |
5293 | o coding-category-iso-7 | |
5294 | ||
5295 | The category for a coding system which has the same code range | |
7717c392 | 5296 | as ISO2022 of 7-bit environment. This doesn't use any locking |
d46c5b12 KH |
5297 | shift and single shift functions. This can encode/decode all |
5298 | charsets. Assigned the coding-system (Lisp symbol) | |
5299 | `iso-2022-7bit' by default. | |
5300 | ||
5301 | o coding-category-iso-7-tight | |
5302 | ||
5303 | Same as coding-category-iso-7 except that this can | |
5304 | encode/decode only the specified charsets. | |
4ed46869 KH |
5305 | |
5306 | o coding-category-iso-8-1 | |
5307 | ||
5308 | The category for a coding system which has the same code range | |
5309 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
5310 | for DIMENSION1 charset. This doesn't use any locking shift |
5311 | and single shift functions. Assigned the coding-system (Lisp | |
5312 | symbol) `iso-latin-1' by default. | |
4ed46869 KH |
5313 | |
5314 | o coding-category-iso-8-2 | |
5315 | ||
5316 | The category for a coding system which has the same code range | |
5317 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
5318 | for DIMENSION2 charset. This doesn't use any locking shift |
5319 | and single shift functions. Assigned the coding-system (Lisp | |
5320 | symbol) `japanese-iso-8bit' by default. | |
4ed46869 | 5321 | |
7717c392 | 5322 | o coding-category-iso-7-else |
4ed46869 KH |
5323 | |
5324 | The category for a coding system which has the same code range | |
df7492f9 | 5325 | as ISO2022 of 7-bit environemnt but uses locking shift or |
7717c392 KH |
5326 | single shift functions. Assigned the coding-system (Lisp |
5327 | symbol) `iso-2022-7bit-lock' by default. | |
5328 | ||
5329 | o coding-category-iso-8-else | |
5330 | ||
5331 | The category for a coding system which has the same code range | |
df7492f9 | 5332 | as ISO2022 of 8-bit environemnt but uses locking shift or |
7717c392 KH |
5333 | single shift functions. Assigned the coding-system (Lisp |
5334 | symbol) `iso-2022-8bit-ss2' by default. | |
4ed46869 KH |
5335 | |
5336 | o coding-category-big5 | |
5337 | ||
5338 | The category for a coding system which has the same code range | |
5339 | as BIG5. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 5340 | `cn-big5' by default. |
4ed46869 | 5341 | |
fa42c37f KH |
5342 | o coding-category-utf-8 |
5343 | ||
5344 | The category for a coding system which has the same code range | |
6e76ae91 | 5345 | as UTF-8 (cf. RFC3629). Assigned the coding-system (Lisp |
fa42c37f KH |
5346 | symbol) `utf-8' by default. |
5347 | ||
5348 | o coding-category-utf-16-be | |
5349 | ||
5350 | The category for a coding system in which a text has an | |
5351 | Unicode signature (cf. Unicode Standard) in the order of BIG | |
5352 | endian at the head. Assigned the coding-system (Lisp symbol) | |
5353 | `utf-16-be' by default. | |
5354 | ||
5355 | o coding-category-utf-16-le | |
5356 | ||
5357 | The category for a coding system in which a text has an | |
5358 | Unicode signature (cf. Unicode Standard) in the order of | |
5359 | LITTLE endian at the head. Assigned the coding-system (Lisp | |
5360 | symbol) `utf-16-le' by default. | |
5361 | ||
1397dc18 KH |
5362 | o coding-category-ccl |
5363 | ||
5364 | The category for a coding system of which encoder/decoder is | |
5365 | written in CCL programs. The default value is nil, i.e., no | |
5366 | coding system is assigned. | |
5367 | ||
4ed46869 KH |
5368 | o coding-category-binary |
5369 | ||
5370 | The category for a coding system not categorized in any of the | |
5371 | above. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 5372 | `no-conversion' by default. |
4ed46869 KH |
5373 | |
5374 | Each of them is a Lisp symbol and the value is an actual | |
df7492f9 | 5375 | `coding-system's (this is also a Lisp symbol) assigned by a user. |
4ed46869 KH |
5376 | What Emacs does actually is to detect a category of coding system. |
5377 | Then, it uses a `coding-system' assigned to it. If Emacs can't | |
df7492f9 | 5378 | decide only one possible category, it selects a category of the |
4ed46869 KH |
5379 | highest priority. Priorities of categories are also specified by a |
5380 | user in a Lisp variable `coding-category-list'. | |
5381 | ||
5382 | */ | |
5383 | ||
df7492f9 KH |
5384 | #define EOL_SEEN_NONE 0 |
5385 | #define EOL_SEEN_LF 1 | |
5386 | #define EOL_SEEN_CR 2 | |
5387 | #define EOL_SEEN_CRLF 4 | |
66cfb530 | 5388 | |
ff0dacd7 KH |
5389 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by |
5390 | SOURCE is encoded. If CATEGORY is one of | |
5391 | coding_category_utf_16_XXXX, assume that CR and LF are encoded by | |
5392 | two-byte, else they are encoded by one-byte. | |
5393 | ||
5394 | Return one of EOL_SEEN_XXX. */ | |
4ed46869 | 5395 | |
bc4bc72a | 5396 | #define MAX_EOL_CHECK_COUNT 3 |
d46c5b12 KH |
5397 | |
5398 | static int | |
89528eb3 | 5399 | detect_eol (source, src_bytes, category) |
f6cbaf43 | 5400 | const unsigned char *source; |
df7492f9 | 5401 | EMACS_INT src_bytes; |
89528eb3 | 5402 | enum coding_category category; |
4ed46869 | 5403 | { |
f6cbaf43 | 5404 | const unsigned char *src = source, *src_end = src + src_bytes; |
4ed46869 | 5405 | unsigned char c; |
df7492f9 KH |
5406 | int total = 0; |
5407 | int eol_seen = EOL_SEEN_NONE; | |
4ed46869 | 5408 | |
89528eb3 | 5409 | if ((1 << category) & CATEGORY_MASK_UTF_16) |
4ed46869 | 5410 | { |
df7492f9 | 5411 | int msb, lsb; |
fa42c37f | 5412 | |
89528eb3 KH |
5413 | msb = category == (coding_category_utf_16_le |
5414 | | coding_category_utf_16_le_nosig); | |
df7492f9 | 5415 | lsb = 1 - msb; |
fa42c37f | 5416 | |
df7492f9 | 5417 | while (src + 1 < src_end) |
fa42c37f | 5418 | { |
df7492f9 KH |
5419 | c = src[lsb]; |
5420 | if (src[msb] == 0 && (c == '\n' || c == '\r')) | |
fa42c37f | 5421 | { |
df7492f9 KH |
5422 | int this_eol; |
5423 | ||
5424 | if (c == '\n') | |
5425 | this_eol = EOL_SEEN_LF; | |
5426 | else if (src + 3 >= src_end | |
5427 | || src[msb + 2] != 0 | |
5428 | || src[lsb + 2] != '\n') | |
5429 | this_eol = EOL_SEEN_CR; | |
fa42c37f | 5430 | else |
8f924df7 | 5431 | this_eol = EOL_SEEN_CRLF; |
df7492f9 KH |
5432 | |
5433 | if (eol_seen == EOL_SEEN_NONE) | |
5434 | /* This is the first end-of-line. */ | |
5435 | eol_seen = this_eol; | |
5436 | else if (eol_seen != this_eol) | |
fa42c37f | 5437 | { |
df7492f9 KH |
5438 | /* The found type is different from what found before. */ |
5439 | eol_seen = EOL_SEEN_LF; | |
5440 | break; | |
fa42c37f | 5441 | } |
df7492f9 KH |
5442 | if (++total == MAX_EOL_CHECK_COUNT) |
5443 | break; | |
fa42c37f | 5444 | } |
df7492f9 | 5445 | src += 2; |
fa42c37f | 5446 | } |
bcf26d6a | 5447 | } |
d46c5b12 | 5448 | else |
c4825358 | 5449 | { |
df7492f9 | 5450 | while (src < src_end) |
27901516 | 5451 | { |
df7492f9 KH |
5452 | c = *src++; |
5453 | if (c == '\n' || c == '\r') | |
5454 | { | |
5455 | int this_eol; | |
d46c5b12 | 5456 | |
df7492f9 KH |
5457 | if (c == '\n') |
5458 | this_eol = EOL_SEEN_LF; | |
5459 | else if (src >= src_end || *src != '\n') | |
5460 | this_eol = EOL_SEEN_CR; | |
5461 | else | |
5462 | this_eol = EOL_SEEN_CRLF, src++; | |
d46c5b12 | 5463 | |
df7492f9 KH |
5464 | if (eol_seen == EOL_SEEN_NONE) |
5465 | /* This is the first end-of-line. */ | |
5466 | eol_seen = this_eol; | |
5467 | else if (eol_seen != this_eol) | |
5468 | { | |
5469 | /* The found type is different from what found before. */ | |
5470 | eol_seen = EOL_SEEN_LF; | |
5471 | break; | |
5472 | } | |
5473 | if (++total == MAX_EOL_CHECK_COUNT) | |
5474 | break; | |
5475 | } | |
5476 | } | |
73be902c | 5477 | } |
df7492f9 | 5478 | return eol_seen; |
73be902c KH |
5479 | } |
5480 | ||
df7492f9 | 5481 | |
24a73b0a | 5482 | static Lisp_Object |
df7492f9 KH |
5483 | adjust_coding_eol_type (coding, eol_seen) |
5484 | struct coding_system *coding; | |
5485 | int eol_seen; | |
73be902c | 5486 | { |
0be8721c | 5487 | Lisp_Object eol_type; |
8f924df7 | 5488 | |
df7492f9 KH |
5489 | eol_type = CODING_ID_EOL_TYPE (coding->id); |
5490 | if (eol_seen & EOL_SEEN_LF) | |
24a73b0a KH |
5491 | { |
5492 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 0)); | |
5493 | eol_type = Qunix; | |
5494 | } | |
6f197c07 | 5495 | else if (eol_seen & EOL_SEEN_CRLF) |
24a73b0a KH |
5496 | { |
5497 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 1)); | |
5498 | eol_type = Qdos; | |
5499 | } | |
6f197c07 | 5500 | else if (eol_seen & EOL_SEEN_CR) |
24a73b0a KH |
5501 | { |
5502 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 2)); | |
5503 | eol_type = Qmac; | |
5504 | } | |
5505 | return eol_type; | |
d46c5b12 | 5506 | } |
4ed46869 | 5507 | |
df7492f9 KH |
5508 | /* Detect how a text specified in CODING is encoded. If a coding |
5509 | system is detected, update fields of CODING by the detected coding | |
5510 | system. */ | |
0a28aafb | 5511 | |
df7492f9 KH |
5512 | void |
5513 | detect_coding (coding) | |
d46c5b12 | 5514 | struct coding_system *coding; |
d46c5b12 | 5515 | { |
8f924df7 | 5516 | const unsigned char *src, *src_end; |
d46c5b12 | 5517 | |
df7492f9 KH |
5518 | coding->consumed = coding->consumed_char = 0; |
5519 | coding->produced = coding->produced_char = 0; | |
5520 | coding_set_source (coding); | |
1c3478b0 | 5521 | |
df7492f9 | 5522 | src_end = coding->source + coding->src_bytes; |
1c3478b0 | 5523 | |
df7492f9 KH |
5524 | /* If we have not yet decided the text encoding type, detect it |
5525 | now. */ | |
5526 | if (EQ (CODING_ATTR_TYPE (CODING_ID_ATTRS (coding->id)), Qundecided)) | |
b73bfc1c | 5527 | { |
df7492f9 | 5528 | int c, i; |
6cb21a4f | 5529 | struct coding_detection_info detect_info; |
df7492f9 | 5530 | |
6cb21a4f | 5531 | detect_info.checked = detect_info.found = detect_info.rejected = 0; |
24a73b0a | 5532 | for (i = 0, src = coding->source; src < src_end; i++, src++) |
d46c5b12 | 5533 | { |
df7492f9 | 5534 | c = *src; |
6cb21a4f | 5535 | if (c & 0x80) |
df7492f9 | 5536 | break; |
6cb21a4f KH |
5537 | if (c < 0x20 |
5538 | && (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) | |
5539 | && ! inhibit_iso_escape_detection | |
5540 | && ! detect_info.checked) | |
5541 | { | |
5542 | coding->head_ascii = src - (coding->source + coding->consumed); | |
5543 | if (detect_coding_iso_2022 (coding, &detect_info)) | |
5544 | { | |
5545 | /* We have scanned the whole data. */ | |
5546 | if (! (detect_info.rejected & CATEGORY_MASK_ISO_7_ELSE)) | |
5547 | /* We didn't find an 8-bit code. */ | |
5548 | src = src_end; | |
5549 | break; | |
5550 | } | |
5551 | } | |
d46c5b12 | 5552 | } |
df7492f9 KH |
5553 | coding->head_ascii = src - (coding->source + coding->consumed); |
5554 | ||
3aef54f3 | 5555 | if (coding->head_ascii < coding->src_bytes |
6cb21a4f | 5556 | || detect_info.found) |
d46c5b12 | 5557 | { |
ff0dacd7 KH |
5558 | enum coding_category category; |
5559 | struct coding_system *this; | |
df7492f9 | 5560 | |
6cb21a4f KH |
5561 | if (coding->head_ascii == coding->src_bytes) |
5562 | /* As all bytes are 7-bit, we can ignore non-ISO-2022 codings. */ | |
5563 | for (i = 0; i < coding_category_raw_text; i++) | |
5564 | { | |
5565 | category = coding_priorities[i]; | |
5566 | this = coding_categories + category; | |
5567 | if (detect_info.found & (1 << category)) | |
24a73b0a | 5568 | break; |
6cb21a4f KH |
5569 | } |
5570 | else | |
5571 | for (i = 0; i < coding_category_raw_text; i++) | |
5572 | { | |
5573 | category = coding_priorities[i]; | |
5574 | this = coding_categories + category; | |
5575 | if (this->id < 0) | |
5576 | { | |
5577 | /* No coding system of this category is defined. */ | |
5578 | detect_info.rejected |= (1 << category); | |
5579 | } | |
5580 | else if (category >= coding_category_raw_text) | |
5581 | continue; | |
5582 | else if (detect_info.checked & (1 << category)) | |
5583 | { | |
5584 | if (detect_info.found & (1 << category)) | |
5585 | break; | |
5586 | } | |
5587 | else if ((*(this->detector)) (coding, &detect_info) | |
5588 | && detect_info.found & (1 << category)) | |
5589 | { | |
5590 | if (category == coding_category_utf_16_auto) | |
5591 | { | |
5592 | if (detect_info.found & CATEGORY_MASK_UTF_16_LE) | |
5593 | category = coding_category_utf_16_le; | |
5594 | else | |
5595 | category = coding_category_utf_16_be; | |
5596 | } | |
5597 | break; | |
5598 | } | |
5599 | } | |
5600 | ||
ff0dacd7 KH |
5601 | if (i < coding_category_raw_text) |
5602 | setup_coding_system (CODING_ID_NAME (this->id), coding); | |
5603 | else if (detect_info.rejected == CATEGORY_MASK_ANY) | |
df7492f9 | 5604 | setup_coding_system (Qraw_text, coding); |
ff0dacd7 | 5605 | else if (detect_info.rejected) |
df7492f9 | 5606 | for (i = 0; i < coding_category_raw_text; i++) |
ff0dacd7 KH |
5607 | if (! (detect_info.rejected & (1 << coding_priorities[i]))) |
5608 | { | |
5609 | this = coding_categories + coding_priorities[i]; | |
5610 | setup_coding_system (CODING_ID_NAME (this->id), coding); | |
5611 | break; | |
5612 | } | |
d46c5b12 | 5613 | } |
b73bfc1c | 5614 | } |
24a73b0a KH |
5615 | else if (XINT (CODING_ATTR_CATEGORY (CODING_ID_ATTRS (coding->id))) |
5616 | == coding_category_utf_16_auto) | |
b49a1807 KH |
5617 | { |
5618 | Lisp_Object coding_systems; | |
5619 | struct coding_detection_info detect_info; | |
5620 | ||
5621 | coding_systems | |
5622 | = AREF (CODING_ID_ATTRS (coding->id), coding_attr_utf_16_bom); | |
5623 | detect_info.found = detect_info.rejected = 0; | |
5624 | if (CONSP (coding_systems) | |
24a73b0a | 5625 | && detect_coding_utf_16 (coding, &detect_info)) |
b49a1807 KH |
5626 | { |
5627 | if (detect_info.found & CATEGORY_MASK_UTF_16_LE) | |
5628 | setup_coding_system (XCAR (coding_systems), coding); | |
24a73b0a | 5629 | else if (detect_info.found & CATEGORY_MASK_UTF_16_BE) |
b49a1807 KH |
5630 | setup_coding_system (XCDR (coding_systems), coding); |
5631 | } | |
5632 | } | |
4ed46869 | 5633 | } |
4ed46869 | 5634 | |
d46c5b12 | 5635 | |
aaaf0b1e | 5636 | static void |
df7492f9 | 5637 | decode_eol (coding) |
aaaf0b1e | 5638 | struct coding_system *coding; |
aaaf0b1e | 5639 | { |
24a73b0a KH |
5640 | Lisp_Object eol_type; |
5641 | unsigned char *p, *pbeg, *pend; | |
5642 | ||
5643 | eol_type = CODING_ID_EOL_TYPE (coding->id); | |
5644 | if (EQ (eol_type, Qunix)) | |
5645 | return; | |
5646 | ||
5647 | if (NILP (coding->dst_object)) | |
5648 | pbeg = coding->destination; | |
5649 | else | |
5650 | pbeg = BYTE_POS_ADDR (coding->dst_pos_byte); | |
5651 | pend = pbeg + coding->produced; | |
5652 | ||
5653 | if (VECTORP (eol_type)) | |
aaaf0b1e | 5654 | { |
df7492f9 | 5655 | int eol_seen = EOL_SEEN_NONE; |
4ed46869 | 5656 | |
24a73b0a | 5657 | for (p = pbeg; p < pend; p++) |
aaaf0b1e | 5658 | { |
df7492f9 KH |
5659 | if (*p == '\n') |
5660 | eol_seen |= EOL_SEEN_LF; | |
5661 | else if (*p == '\r') | |
aaaf0b1e | 5662 | { |
df7492f9 | 5663 | if (p + 1 < pend && *(p + 1) == '\n') |
aaaf0b1e | 5664 | { |
df7492f9 KH |
5665 | eol_seen |= EOL_SEEN_CRLF; |
5666 | p++; | |
aaaf0b1e | 5667 | } |
aaaf0b1e | 5668 | else |
df7492f9 | 5669 | eol_seen |= EOL_SEEN_CR; |
aaaf0b1e | 5670 | } |
aaaf0b1e | 5671 | } |
24a73b0a KH |
5672 | if (eol_seen != EOL_SEEN_NONE |
5673 | && eol_seen != EOL_SEEN_LF | |
5674 | && eol_seen != EOL_SEEN_CRLF | |
5675 | && eol_seen != EOL_SEEN_CR) | |
5676 | eol_seen = EOL_SEEN_LF; | |
df7492f9 | 5677 | if (eol_seen != EOL_SEEN_NONE) |
24a73b0a | 5678 | eol_type = adjust_coding_eol_type (coding, eol_seen); |
aaaf0b1e | 5679 | } |
d46c5b12 | 5680 | |
24a73b0a | 5681 | if (EQ (eol_type, Qmac)) |
27901516 | 5682 | { |
24a73b0a | 5683 | for (p = pbeg; p < pend; p++) |
df7492f9 KH |
5684 | if (*p == '\r') |
5685 | *p = '\n'; | |
4ed46869 | 5686 | } |
24a73b0a | 5687 | else if (EQ (eol_type, Qdos)) |
df7492f9 | 5688 | { |
24a73b0a | 5689 | int n = 0; |
b73bfc1c | 5690 | |
24a73b0a KH |
5691 | if (NILP (coding->dst_object)) |
5692 | { | |
4347441b KH |
5693 | /* Start deleting '\r' from the tail to minimize the memory |
5694 | movement. */ | |
24a73b0a KH |
5695 | for (p = pend - 2; p >= pbeg; p--) |
5696 | if (*p == '\r') | |
5697 | { | |
5698 | safe_bcopy ((char *) (p + 1), (char *) p, pend-- - p - 1); | |
5699 | n++; | |
5700 | } | |
5701 | } | |
5702 | else | |
5703 | { | |
4347441b KH |
5704 | int pos_byte = coding->dst_pos_byte; |
5705 | int pos = coding->dst_pos; | |
5706 | int pos_end = pos + coding->produced_char - 1; | |
5707 | ||
5708 | while (pos < pos_end) | |
5709 | { | |
5710 | p = BYTE_POS_ADDR (pos_byte); | |
5711 | if (*p == '\r' && p[1] == '\n') | |
5712 | { | |
5713 | del_range_2 (pos, pos_byte, pos + 1, pos_byte + 1, 0); | |
5714 | n++; | |
5715 | pos_end--; | |
5716 | } | |
5717 | pos++; | |
5718 | pos_byte += BYTES_BY_CHAR_HEAD (*p); | |
5719 | } | |
24a73b0a KH |
5720 | } |
5721 | coding->produced -= n; | |
5722 | coding->produced_char -= n; | |
aaaf0b1e | 5723 | } |
4ed46869 KH |
5724 | } |
5725 | ||
7d64c6ad | 5726 | |
a6f87d34 KH |
5727 | /* Return a translation table (or list of them) from coding system |
5728 | attribute vector ATTRS for encoding (ENCODEP is nonzero) or | |
5729 | decoding (ENCODEP is zero). */ | |
7d64c6ad | 5730 | |
e6a54062 | 5731 | static Lisp_Object |
09ee6fdd KH |
5732 | get_translation_table (attrs, encodep, max_lookup) |
5733 | Lisp_Object attrs; | |
5734 | int encodep, *max_lookup; | |
7d64c6ad KH |
5735 | { |
5736 | Lisp_Object standard, translation_table; | |
09ee6fdd | 5737 | Lisp_Object val; |
7d64c6ad KH |
5738 | |
5739 | if (encodep) | |
5740 | translation_table = CODING_ATTR_ENCODE_TBL (attrs), | |
5741 | standard = Vstandard_translation_table_for_encode; | |
5742 | else | |
5743 | translation_table = CODING_ATTR_DECODE_TBL (attrs), | |
5744 | standard = Vstandard_translation_table_for_decode; | |
7d64c6ad | 5745 | if (NILP (translation_table)) |
09ee6fdd KH |
5746 | translation_table = standard; |
5747 | else | |
a6f87d34 | 5748 | { |
09ee6fdd KH |
5749 | if (SYMBOLP (translation_table)) |
5750 | translation_table = Fget (translation_table, Qtranslation_table); | |
5751 | else if (CONSP (translation_table)) | |
5752 | { | |
5753 | translation_table = Fcopy_sequence (translation_table); | |
5754 | for (val = translation_table; CONSP (val); val = XCDR (val)) | |
5755 | if (SYMBOLP (XCAR (val))) | |
5756 | XSETCAR (val, Fget (XCAR (val), Qtranslation_table)); | |
5757 | } | |
5758 | if (CHAR_TABLE_P (standard)) | |
5759 | { | |
5760 | if (CONSP (translation_table)) | |
5761 | translation_table = nconc2 (translation_table, | |
5762 | Fcons (standard, Qnil)); | |
5763 | else | |
5764 | translation_table = Fcons (translation_table, | |
5765 | Fcons (standard, Qnil)); | |
5766 | } | |
a6f87d34 | 5767 | } |
2170c8f0 KH |
5768 | |
5769 | if (max_lookup) | |
09ee6fdd | 5770 | { |
2170c8f0 KH |
5771 | *max_lookup = 1; |
5772 | if (CHAR_TABLE_P (translation_table) | |
5773 | && CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (translation_table)) > 1) | |
5774 | { | |
5775 | val = XCHAR_TABLE (translation_table)->extras[1]; | |
5776 | if (NATNUMP (val) && *max_lookup < XFASTINT (val)) | |
5777 | *max_lookup = XFASTINT (val); | |
5778 | } | |
5779 | else if (CONSP (translation_table)) | |
5780 | { | |
5781 | Lisp_Object tail, val; | |
09ee6fdd | 5782 | |
2170c8f0 KH |
5783 | for (tail = translation_table; CONSP (tail); tail = XCDR (tail)) |
5784 | if (CHAR_TABLE_P (XCAR (tail)) | |
5785 | && CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (XCAR (tail))) > 1) | |
5786 | { | |
5787 | val = XCHAR_TABLE (XCAR (tail))->extras[1]; | |
5788 | if (NATNUMP (val) && *max_lookup < XFASTINT (val)) | |
5789 | *max_lookup = XFASTINT (val); | |
5790 | } | |
5791 | } | |
a6f87d34 | 5792 | } |
7d64c6ad KH |
5793 | return translation_table; |
5794 | } | |
5795 | ||
09ee6fdd KH |
5796 | #define LOOKUP_TRANSLATION_TABLE(table, c, trans) \ |
5797 | do { \ | |
5798 | trans = Qnil; \ | |
5799 | if (CHAR_TABLE_P (table)) \ | |
5800 | { \ | |
5801 | trans = CHAR_TABLE_REF (table, c); \ | |
5802 | if (CHARACTERP (trans)) \ | |
5803 | c = XFASTINT (trans), trans = Qnil; \ | |
5804 | } \ | |
5805 | else if (CONSP (table)) \ | |
5806 | { \ | |
5807 | Lisp_Object tail; \ | |
5808 | \ | |
5809 | for (tail = table; CONSP (tail); tail = XCDR (tail)) \ | |
5810 | if (CHAR_TABLE_P (XCAR (tail))) \ | |
5811 | { \ | |
5812 | trans = CHAR_TABLE_REF (XCAR (tail), c); \ | |
5813 | if (CHARACTERP (trans)) \ | |
5814 | c = XFASTINT (trans), trans = Qnil; \ | |
5815 | else if (! NILP (trans)) \ | |
5816 | break; \ | |
5817 | } \ | |
5818 | } \ | |
e6a54062 KH |
5819 | } while (0) |
5820 | ||
7d64c6ad | 5821 | |
69a80ea3 KH |
5822 | static Lisp_Object |
5823 | get_translation (val, buf, buf_end, last_block, from_nchars, to_nchars) | |
5824 | Lisp_Object val; | |
5825 | int *buf, *buf_end; | |
5826 | int last_block; | |
5827 | int *from_nchars, *to_nchars; | |
5828 | { | |
433f7f87 KH |
5829 | /* VAL is TO or (([FROM-CHAR ...] . TO) ...) where TO is TO-CHAR or |
5830 | [TO-CHAR ...]. */ | |
69a80ea3 KH |
5831 | if (CONSP (val)) |
5832 | { | |
433f7f87 | 5833 | Lisp_Object from, tail; |
69a80ea3 KH |
5834 | int i, len; |
5835 | ||
433f7f87 | 5836 | for (tail = val; CONSP (tail); tail = XCDR (tail)) |
69a80ea3 | 5837 | { |
433f7f87 KH |
5838 | val = XCAR (tail); |
5839 | from = XCAR (val); | |
5840 | len = ASIZE (from); | |
5841 | for (i = 0; i < len; i++) | |
5842 | { | |
5843 | if (buf + i == buf_end) | |
5844 | { | |
5845 | if (! last_block) | |
5846 | return Qt; | |
5847 | break; | |
5848 | } | |
5849 | if (XINT (AREF (from, i)) != buf[i]) | |
5850 | break; | |
5851 | } | |
5852 | if (i == len) | |
5853 | { | |
5854 | val = XCDR (val); | |
5855 | *from_nchars = len; | |
5856 | break; | |
5857 | } | |
69a80ea3 | 5858 | } |
433f7f87 KH |
5859 | if (! CONSP (tail)) |
5860 | return Qnil; | |
69a80ea3 KH |
5861 | } |
5862 | if (VECTORP (val)) | |
5863 | *buf = XINT (AREF (val, 0)), *to_nchars = ASIZE (val); | |
5864 | else | |
5865 | *buf = XINT (val); | |
5866 | return val; | |
5867 | } | |
5868 | ||
5869 | ||
d46c5b12 | 5870 | static int |
69a80ea3 | 5871 | produce_chars (coding, translation_table, last_block) |
df7492f9 | 5872 | struct coding_system *coding; |
69a80ea3 KH |
5873 | Lisp_Object translation_table; |
5874 | int last_block; | |
4ed46869 | 5875 | { |
df7492f9 KH |
5876 | unsigned char *dst = coding->destination + coding->produced; |
5877 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
5878 | int produced; | |
5879 | int produced_chars = 0; | |
69a80ea3 | 5880 | int carryover = 0; |
4ed46869 | 5881 | |
df7492f9 | 5882 | if (! coding->chars_at_source) |
4ed46869 | 5883 | { |
df7492f9 | 5884 | /* Characters are in coding->charbuf. */ |
fba4576f AS |
5885 | int *buf = coding->charbuf; |
5886 | int *buf_end = buf + coding->charbuf_used; | |
4ed46869 | 5887 | |
df7492f9 KH |
5888 | if (BUFFERP (coding->src_object) |
5889 | && EQ (coding->src_object, coding->dst_object)) | |
8f924df7 | 5890 | dst_end = ((unsigned char *) coding->source) + coding->consumed; |
4ed46869 | 5891 | |
df7492f9 | 5892 | while (buf < buf_end) |
4ed46869 | 5893 | { |
69a80ea3 | 5894 | int c = *buf, i; |
bc4bc72a | 5895 | |
df7492f9 KH |
5896 | if (c >= 0) |
5897 | { | |
69a80ea3 KH |
5898 | int from_nchars = 1, to_nchars = 1; |
5899 | Lisp_Object trans = Qnil; | |
5900 | ||
09ee6fdd | 5901 | LOOKUP_TRANSLATION_TABLE (translation_table, c, trans); |
e6a54062 | 5902 | if (! NILP (trans)) |
69a80ea3 KH |
5903 | { |
5904 | trans = get_translation (trans, buf, buf_end, last_block, | |
5905 | &from_nchars, &to_nchars); | |
5906 | if (EQ (trans, Qt)) | |
5907 | break; | |
5908 | c = *buf; | |
5909 | } | |
5910 | ||
5911 | if (dst + MAX_MULTIBYTE_LENGTH * to_nchars > dst_end) | |
5912 | { | |
5913 | dst = alloc_destination (coding, | |
5914 | buf_end - buf | |
5915 | + MAX_MULTIBYTE_LENGTH * to_nchars, | |
5916 | dst); | |
5917 | dst_end = coding->destination + coding->dst_bytes; | |
5918 | } | |
5919 | ||
433f7f87 | 5920 | for (i = 0; i < to_nchars; i++) |
69a80ea3 | 5921 | { |
433f7f87 KH |
5922 | if (i > 0) |
5923 | c = XINT (AREF (trans, i)); | |
69a80ea3 KH |
5924 | if (coding->dst_multibyte |
5925 | || ! CHAR_BYTE8_P (c)) | |
5926 | CHAR_STRING_ADVANCE (c, dst); | |
5927 | else | |
5928 | *dst++ = CHAR_TO_BYTE8 (c); | |
5929 | } | |
5930 | produced_chars += to_nchars; | |
5931 | *buf++ = to_nchars; | |
5932 | while (--from_nchars > 0) | |
5933 | *buf++ = 0; | |
d46c5b12 | 5934 | } |
df7492f9 | 5935 | else |
69a80ea3 KH |
5936 | /* This is an annotation datum. (-C) is the length. */ |
5937 | buf += -c; | |
4ed46869 | 5938 | } |
69a80ea3 | 5939 | carryover = buf_end - buf; |
4ed46869 | 5940 | } |
fa42c37f | 5941 | else |
fa42c37f | 5942 | { |
8f924df7 KH |
5943 | const unsigned char *src = coding->source; |
5944 | const unsigned char *src_end = src + coding->src_bytes; | |
df7492f9 | 5945 | Lisp_Object eol_type; |
fa42c37f | 5946 | |
df7492f9 | 5947 | eol_type = CODING_ID_EOL_TYPE (coding->id); |
4ed46869 | 5948 | |
df7492f9 | 5949 | if (coding->src_multibyte != coding->dst_multibyte) |
fa42c37f | 5950 | { |
df7492f9 | 5951 | if (coding->src_multibyte) |
fa42c37f | 5952 | { |
71c81426 | 5953 | int multibytep = 1; |
df7492f9 | 5954 | int consumed_chars; |
d46c5b12 | 5955 | |
df7492f9 KH |
5956 | while (1) |
5957 | { | |
8f924df7 | 5958 | const unsigned char *src_base = src; |
df7492f9 | 5959 | int c; |
b73bfc1c | 5960 | |
df7492f9 KH |
5961 | ONE_MORE_BYTE (c); |
5962 | if (c == '\r') | |
5963 | { | |
5964 | if (EQ (eol_type, Qdos)) | |
5965 | { | |
98725083 KH |
5966 | if (src == src_end) |
5967 | { | |
065e3595 KH |
5968 | record_conversion_result |
5969 | (coding, CODING_RESULT_INSUFFICIENT_SRC); | |
98725083 KH |
5970 | goto no_more_source; |
5971 | } | |
5972 | if (*src == '\n') | |
df7492f9 KH |
5973 | c = *src++; |
5974 | } | |
5975 | else if (EQ (eol_type, Qmac)) | |
5976 | c = '\n'; | |
5977 | } | |
5978 | if (dst == dst_end) | |
5979 | { | |
2c78b7e1 | 5980 | coding->consumed = src - coding->source; |
b73bfc1c | 5981 | |
2c78b7e1 | 5982 | if (EQ (coding->src_object, coding->dst_object)) |
8f924df7 | 5983 | dst_end = (unsigned char *) src; |
2c78b7e1 KH |
5984 | if (dst == dst_end) |
5985 | { | |
5986 | dst = alloc_destination (coding, src_end - src + 1, | |
5987 | dst); | |
5988 | dst_end = coding->destination + coding->dst_bytes; | |
5989 | coding_set_source (coding); | |
5990 | src = coding->source + coding->consumed; | |
5991 | src_end = coding->source + coding->src_bytes; | |
5992 | } | |
df7492f9 KH |
5993 | } |
5994 | *dst++ = c; | |
5995 | produced_chars++; | |
5996 | } | |
5997 | no_more_source: | |
5998 | ; | |
fa42c37f KH |
5999 | } |
6000 | else | |
df7492f9 KH |
6001 | while (src < src_end) |
6002 | { | |
71c81426 | 6003 | int multibytep = 1; |
df7492f9 | 6004 | int c = *src++; |
b73bfc1c | 6005 | |
df7492f9 KH |
6006 | if (c == '\r') |
6007 | { | |
6008 | if (EQ (eol_type, Qdos)) | |
6009 | { | |
6010 | if (src < src_end | |
6011 | && *src == '\n') | |
6012 | c = *src++; | |
6013 | } | |
6014 | else if (EQ (eol_type, Qmac)) | |
6015 | c = '\n'; | |
6016 | } | |
6017 | if (dst >= dst_end - 1) | |
6018 | { | |
2c78b7e1 | 6019 | coding->consumed = src - coding->source; |
df7492f9 | 6020 | |
2c78b7e1 | 6021 | if (EQ (coding->src_object, coding->dst_object)) |
8f924df7 | 6022 | dst_end = (unsigned char *) src; |
2c78b7e1 KH |
6023 | if (dst >= dst_end - 1) |
6024 | { | |
6025 | dst = alloc_destination (coding, src_end - src + 2, | |
6026 | dst); | |
6027 | dst_end = coding->destination + coding->dst_bytes; | |
6028 | coding_set_source (coding); | |
6029 | src = coding->source + coding->consumed; | |
6030 | src_end = coding->source + coding->src_bytes; | |
6031 | } | |
df7492f9 KH |
6032 | } |
6033 | EMIT_ONE_BYTE (c); | |
6034 | } | |
d46c5b12 | 6035 | } |
df7492f9 KH |
6036 | else |
6037 | { | |
6038 | if (!EQ (coding->src_object, coding->dst_object)) | |
fa42c37f | 6039 | { |
df7492f9 | 6040 | int require = coding->src_bytes - coding->dst_bytes; |
4ed46869 | 6041 | |
df7492f9 | 6042 | if (require > 0) |
fa42c37f | 6043 | { |
df7492f9 KH |
6044 | EMACS_INT offset = src - coding->source; |
6045 | ||
6046 | dst = alloc_destination (coding, require, dst); | |
6047 | coding_set_source (coding); | |
6048 | src = coding->source + offset; | |
6049 | src_end = coding->source + coding->src_bytes; | |
fa42c37f KH |
6050 | } |
6051 | } | |
df7492f9 KH |
6052 | produced_chars = coding->src_chars; |
6053 | while (src < src_end) | |
fa42c37f | 6054 | { |
df7492f9 KH |
6055 | int c = *src++; |
6056 | ||
6057 | if (c == '\r') | |
6058 | { | |
6059 | if (EQ (eol_type, Qdos)) | |
6060 | { | |
6061 | if (src < src_end | |
6062 | && *src == '\n') | |
6063 | c = *src++; | |
6064 | produced_chars--; | |
6065 | } | |
6066 | else if (EQ (eol_type, Qmac)) | |
6067 | c = '\n'; | |
6068 | } | |
6069 | *dst++ = c; | |
fa42c37f KH |
6070 | } |
6071 | } | |
2c78b7e1 KH |
6072 | coding->consumed = coding->src_bytes; |
6073 | coding->consumed_char = coding->src_chars; | |
fa42c37f KH |
6074 | } |
6075 | ||
df7492f9 | 6076 | produced = dst - (coding->destination + coding->produced); |
284201e4 | 6077 | if (BUFFERP (coding->dst_object) && produced_chars > 0) |
df7492f9 KH |
6078 | insert_from_gap (produced_chars, produced); |
6079 | coding->produced += produced; | |
6080 | coding->produced_char += produced_chars; | |
69a80ea3 | 6081 | return carryover; |
fa42c37f KH |
6082 | } |
6083 | ||
ff0dacd7 KH |
6084 | /* Compose text in CODING->object according to the annotation data at |
6085 | CHARBUF. CHARBUF is an array: | |
6086 | [ -LENGTH ANNOTATION_MASK FROM TO METHOD COMP_LEN [ COMPONENTS... ] ] | |
df7492f9 | 6087 | */ |
4ed46869 | 6088 | |
df7492f9 | 6089 | static INLINE void |
69a80ea3 | 6090 | produce_composition (coding, charbuf, pos) |
4ed46869 | 6091 | struct coding_system *coding; |
df7492f9 | 6092 | int *charbuf; |
69a80ea3 | 6093 | EMACS_INT pos; |
4ed46869 | 6094 | { |
df7492f9 | 6095 | int len; |
69a80ea3 | 6096 | EMACS_INT to; |
df7492f9 | 6097 | enum composition_method method; |
df7492f9 | 6098 | Lisp_Object components; |
fa42c37f | 6099 | |
df7492f9 | 6100 | len = -charbuf[0]; |
69a80ea3 | 6101 | to = pos + charbuf[2]; |
9ffd559c KH |
6102 | if (to <= pos) |
6103 | return; | |
69a80ea3 | 6104 | method = (enum composition_method) (charbuf[3]); |
d46c5b12 | 6105 | |
df7492f9 KH |
6106 | if (method == COMPOSITION_RELATIVE) |
6107 | components = Qnil; | |
9ffd559c KH |
6108 | else if (method >= COMPOSITION_WITH_RULE |
6109 | && method <= COMPOSITION_WITH_RULE_ALTCHARS) | |
d46c5b12 | 6110 | { |
df7492f9 KH |
6111 | Lisp_Object args[MAX_COMPOSITION_COMPONENTS * 2 - 1]; |
6112 | int i; | |
b73bfc1c | 6113 | |
69a80ea3 KH |
6114 | len -= 4; |
6115 | charbuf += 4; | |
df7492f9 | 6116 | for (i = 0; i < len; i++) |
9ffd559c KH |
6117 | { |
6118 | args[i] = make_number (charbuf[i]); | |
f75c90a9 | 6119 | if (charbuf[i] < 0) |
9ffd559c KH |
6120 | return; |
6121 | } | |
df7492f9 KH |
6122 | components = (method == COMPOSITION_WITH_ALTCHARS |
6123 | ? Fstring (len, args) : Fvector (len, args)); | |
d46c5b12 | 6124 | } |
9ffd559c KH |
6125 | else |
6126 | return; | |
69a80ea3 | 6127 | compose_text (pos, to, components, Qnil, coding->dst_object); |
d46c5b12 KH |
6128 | } |
6129 | ||
d46c5b12 | 6130 | |
ff0dacd7 KH |
6131 | /* Put `charset' property on text in CODING->object according to |
6132 | the annotation data at CHARBUF. CHARBUF is an array: | |
69a80ea3 | 6133 | [ -LENGTH ANNOTATION_MASK NCHARS CHARSET-ID ] |
ff0dacd7 | 6134 | */ |
d46c5b12 | 6135 | |
ff0dacd7 | 6136 | static INLINE void |
69a80ea3 | 6137 | produce_charset (coding, charbuf, pos) |
d46c5b12 | 6138 | struct coding_system *coding; |
ff0dacd7 | 6139 | int *charbuf; |
69a80ea3 | 6140 | EMACS_INT pos; |
d46c5b12 | 6141 | { |
69a80ea3 KH |
6142 | EMACS_INT from = pos - charbuf[2]; |
6143 | struct charset *charset = CHARSET_FROM_ID (charbuf[3]); | |
b73bfc1c | 6144 | |
69a80ea3 | 6145 | Fput_text_property (make_number (from), make_number (pos), |
ff0dacd7 KH |
6146 | Qcharset, CHARSET_NAME (charset), |
6147 | coding->dst_object); | |
d46c5b12 KH |
6148 | } |
6149 | ||
d46c5b12 | 6150 | |
df7492f9 KH |
6151 | #define CHARBUF_SIZE 0x4000 |
6152 | ||
6153 | #define ALLOC_CONVERSION_WORK_AREA(coding) \ | |
6154 | do { \ | |
6155 | int size = CHARBUF_SIZE;; \ | |
6156 | \ | |
6157 | coding->charbuf = NULL; \ | |
6158 | while (size > 1024) \ | |
6159 | { \ | |
6160 | coding->charbuf = (int *) alloca (sizeof (int) * size); \ | |
6161 | if (coding->charbuf) \ | |
6162 | break; \ | |
6163 | size >>= 1; \ | |
6164 | } \ | |
6165 | if (! coding->charbuf) \ | |
6166 | { \ | |
065e3595 | 6167 | record_conversion_result (coding, CODING_RESULT_INSUFFICIENT_MEM); \ |
df7492f9 KH |
6168 | return coding->result; \ |
6169 | } \ | |
6170 | coding->charbuf_size = size; \ | |
6171 | } while (0) | |
4ed46869 | 6172 | |
d46c5b12 KH |
6173 | |
6174 | static void | |
69a80ea3 | 6175 | produce_annotation (coding, pos) |
d46c5b12 | 6176 | struct coding_system *coding; |
69a80ea3 | 6177 | EMACS_INT pos; |
d46c5b12 | 6178 | { |
df7492f9 KH |
6179 | int *charbuf = coding->charbuf; |
6180 | int *charbuf_end = charbuf + coding->charbuf_used; | |
d46c5b12 | 6181 | |
ff0dacd7 KH |
6182 | if (NILP (coding->dst_object)) |
6183 | return; | |
d46c5b12 | 6184 | |
df7492f9 | 6185 | while (charbuf < charbuf_end) |
a84f1519 | 6186 | { |
df7492f9 | 6187 | if (*charbuf >= 0) |
69a80ea3 | 6188 | pos += *charbuf++; |
d46c5b12 | 6189 | else |
d46c5b12 | 6190 | { |
df7492f9 | 6191 | int len = -*charbuf; |
ff0dacd7 | 6192 | switch (charbuf[1]) |
df7492f9 KH |
6193 | { |
6194 | case CODING_ANNOTATE_COMPOSITION_MASK: | |
69a80ea3 | 6195 | produce_composition (coding, charbuf, pos); |
df7492f9 | 6196 | break; |
ff0dacd7 | 6197 | case CODING_ANNOTATE_CHARSET_MASK: |
69a80ea3 | 6198 | produce_charset (coding, charbuf, pos); |
ff0dacd7 | 6199 | break; |
df7492f9 KH |
6200 | default: |
6201 | abort (); | |
6202 | } | |
6203 | charbuf += len; | |
d46c5b12 | 6204 | } |
a84f1519 | 6205 | } |
d46c5b12 KH |
6206 | } |
6207 | ||
df7492f9 KH |
6208 | /* Decode the data at CODING->src_object into CODING->dst_object. |
6209 | CODING->src_object is a buffer, a string, or nil. | |
6210 | CODING->dst_object is a buffer. | |
d46c5b12 | 6211 | |
df7492f9 KH |
6212 | If CODING->src_object is a buffer, it must be the current buffer. |
6213 | In this case, if CODING->src_pos is positive, it is a position of | |
6214 | the source text in the buffer, otherwise, the source text is in the | |
6215 | gap area of the buffer, and CODING->src_pos specifies the offset of | |
6216 | the text from GPT (which must be the same as PT). If this is the | |
6217 | same buffer as CODING->dst_object, CODING->src_pos must be | |
6218 | negative. | |
d46c5b12 | 6219 | |
b6828792 | 6220 | If CODING->src_object is a string, CODING->src_pos is an index to |
df7492f9 | 6221 | that string. |
d46c5b12 | 6222 | |
df7492f9 KH |
6223 | If CODING->src_object is nil, CODING->source must already point to |
6224 | the non-relocatable memory area. In this case, CODING->src_pos is | |
6225 | an offset from CODING->source. | |
73be902c | 6226 | |
df7492f9 KH |
6227 | The decoded data is inserted at the current point of the buffer |
6228 | CODING->dst_object. | |
6229 | */ | |
d46c5b12 | 6230 | |
df7492f9 KH |
6231 | static int |
6232 | decode_coding (coding) | |
d46c5b12 | 6233 | struct coding_system *coding; |
d46c5b12 | 6234 | { |
df7492f9 | 6235 | Lisp_Object attrs; |
24a73b0a | 6236 | Lisp_Object undo_list; |
7d64c6ad | 6237 | Lisp_Object translation_table; |
69a80ea3 KH |
6238 | int carryover; |
6239 | int i; | |
d46c5b12 | 6240 | |
df7492f9 KH |
6241 | if (BUFFERP (coding->src_object) |
6242 | && coding->src_pos > 0 | |
6243 | && coding->src_pos < GPT | |
6244 | && coding->src_pos + coding->src_chars > GPT) | |
6245 | move_gap_both (coding->src_pos, coding->src_pos_byte); | |
d46c5b12 | 6246 | |
24a73b0a | 6247 | undo_list = Qt; |
df7492f9 | 6248 | if (BUFFERP (coding->dst_object)) |
1c3478b0 | 6249 | { |
df7492f9 KH |
6250 | if (current_buffer != XBUFFER (coding->dst_object)) |
6251 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
6252 | if (GPT != PT) | |
6253 | move_gap_both (PT, PT_BYTE); | |
24a73b0a KH |
6254 | undo_list = current_buffer->undo_list; |
6255 | current_buffer->undo_list = Qt; | |
1c3478b0 KH |
6256 | } |
6257 | ||
df7492f9 KH |
6258 | coding->consumed = coding->consumed_char = 0; |
6259 | coding->produced = coding->produced_char = 0; | |
6260 | coding->chars_at_source = 0; | |
065e3595 | 6261 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
df7492f9 | 6262 | coding->errors = 0; |
1c3478b0 | 6263 | |
df7492f9 KH |
6264 | ALLOC_CONVERSION_WORK_AREA (coding); |
6265 | ||
6266 | attrs = CODING_ID_ATTRS (coding->id); | |
2170c8f0 | 6267 | translation_table = get_translation_table (attrs, 0, NULL); |
df7492f9 | 6268 | |
69a80ea3 | 6269 | carryover = 0; |
df7492f9 | 6270 | do |
b73bfc1c | 6271 | { |
69a80ea3 KH |
6272 | EMACS_INT pos = coding->dst_pos + coding->produced_char; |
6273 | ||
df7492f9 KH |
6274 | coding_set_source (coding); |
6275 | coding->annotated = 0; | |
69a80ea3 | 6276 | coding->charbuf_used = carryover; |
df7492f9 | 6277 | (*(coding->decoder)) (coding); |
df7492f9 | 6278 | coding_set_destination (coding); |
69a80ea3 | 6279 | carryover = produce_chars (coding, translation_table, 0); |
df7492f9 | 6280 | if (coding->annotated) |
69a80ea3 KH |
6281 | produce_annotation (coding, pos); |
6282 | for (i = 0; i < carryover; i++) | |
6283 | coding->charbuf[i] | |
6284 | = coding->charbuf[coding->charbuf_used - carryover + i]; | |
d46c5b12 | 6285 | } |
df7492f9 | 6286 | while (coding->consumed < coding->src_bytes |
54b367bb KH |
6287 | && (coding->result == CODING_RESULT_SUCCESS |
6288 | || coding->result == CODING_RESULT_INVALID_SRC)); | |
d46c5b12 | 6289 | |
69a80ea3 KH |
6290 | if (carryover > 0) |
6291 | { | |
6292 | coding_set_destination (coding); | |
6293 | coding->charbuf_used = carryover; | |
6294 | produce_chars (coding, translation_table, 1); | |
6295 | } | |
6296 | ||
df7492f9 KH |
6297 | coding->carryover_bytes = 0; |
6298 | if (coding->consumed < coding->src_bytes) | |
d46c5b12 | 6299 | { |
df7492f9 | 6300 | int nbytes = coding->src_bytes - coding->consumed; |
8f924df7 | 6301 | const unsigned char *src; |
df7492f9 KH |
6302 | |
6303 | coding_set_source (coding); | |
6304 | coding_set_destination (coding); | |
6305 | src = coding->source + coding->consumed; | |
6306 | ||
6307 | if (coding->mode & CODING_MODE_LAST_BLOCK) | |
1c3478b0 | 6308 | { |
df7492f9 KH |
6309 | /* Flush out unprocessed data as binary chars. We are sure |
6310 | that the number of data is less than the size of | |
6311 | coding->charbuf. */ | |
065e3595 | 6312 | coding->charbuf_used = 0; |
df7492f9 | 6313 | while (nbytes-- > 0) |
1c3478b0 | 6314 | { |
df7492f9 | 6315 | int c = *src++; |
98725083 | 6316 | |
1c91457d KH |
6317 | if (c & 0x80) |
6318 | c = BYTE8_TO_CHAR (c); | |
6319 | coding->charbuf[coding->charbuf_used++] = c; | |
1c3478b0 | 6320 | } |
f6cbaf43 | 6321 | produce_chars (coding, Qnil, 1); |
d46c5b12 | 6322 | } |
d46c5b12 | 6323 | else |
df7492f9 KH |
6324 | { |
6325 | /* Record unprocessed bytes in coding->carryover. We are | |
6326 | sure that the number of data is less than the size of | |
6327 | coding->carryover. */ | |
6328 | unsigned char *p = coding->carryover; | |
6329 | ||
6330 | coding->carryover_bytes = nbytes; | |
6331 | while (nbytes-- > 0) | |
6332 | *p++ = *src++; | |
1c3478b0 | 6333 | } |
df7492f9 | 6334 | coding->consumed = coding->src_bytes; |
b73bfc1c | 6335 | } |
69f76525 | 6336 | |
4347441b KH |
6337 | if (! EQ (CODING_ID_EOL_TYPE (coding->id), Qunix)) |
6338 | decode_eol (coding); | |
24a73b0a KH |
6339 | if (BUFFERP (coding->dst_object)) |
6340 | { | |
6341 | current_buffer->undo_list = undo_list; | |
6342 | record_insert (coding->dst_pos, coding->produced_char); | |
6343 | } | |
73be902c | 6344 | return coding->result; |
4ed46869 KH |
6345 | } |
6346 | ||
aaaf0b1e | 6347 | |
e1c23804 | 6348 | /* Extract an annotation datum from a composition starting at POS and |
ff0dacd7 KH |
6349 | ending before LIMIT of CODING->src_object (buffer or string), store |
6350 | the data in BUF, set *STOP to a starting position of the next | |
6351 | composition (if any) or to LIMIT, and return the address of the | |
6352 | next element of BUF. | |
6353 | ||
6354 | If such an annotation is not found, set *STOP to a starting | |
6355 | position of a composition after POS (if any) or to LIMIT, and | |
6356 | return BUF. */ | |
6357 | ||
6358 | static INLINE int * | |
6359 | handle_composition_annotation (pos, limit, coding, buf, stop) | |
6360 | EMACS_INT pos, limit; | |
aaaf0b1e | 6361 | struct coding_system *coding; |
ff0dacd7 KH |
6362 | int *buf; |
6363 | EMACS_INT *stop; | |
aaaf0b1e | 6364 | { |
ff0dacd7 KH |
6365 | EMACS_INT start, end; |
6366 | Lisp_Object prop; | |
aaaf0b1e | 6367 | |
ff0dacd7 KH |
6368 | if (! find_composition (pos, limit, &start, &end, &prop, coding->src_object) |
6369 | || end > limit) | |
6370 | *stop = limit; | |
6371 | else if (start > pos) | |
6372 | *stop = start; | |
6373 | else | |
aaaf0b1e | 6374 | { |
ff0dacd7 | 6375 | if (start == pos) |
aaaf0b1e | 6376 | { |
ff0dacd7 KH |
6377 | /* We found a composition. Store the corresponding |
6378 | annotation data in BUF. */ | |
6379 | int *head = buf; | |
6380 | enum composition_method method = COMPOSITION_METHOD (prop); | |
6381 | int nchars = COMPOSITION_LENGTH (prop); | |
6382 | ||
69a80ea3 | 6383 | ADD_COMPOSITION_DATA (buf, nchars, method); |
ff0dacd7 | 6384 | if (method != COMPOSITION_RELATIVE) |
aaaf0b1e | 6385 | { |
ff0dacd7 KH |
6386 | Lisp_Object components; |
6387 | int len, i, i_byte; | |
6388 | ||
6389 | components = COMPOSITION_COMPONENTS (prop); | |
6390 | if (VECTORP (components)) | |
aaaf0b1e | 6391 | { |
ff0dacd7 KH |
6392 | len = XVECTOR (components)->size; |
6393 | for (i = 0; i < len; i++) | |
6394 | *buf++ = XINT (AREF (components, i)); | |
aaaf0b1e | 6395 | } |
ff0dacd7 | 6396 | else if (STRINGP (components)) |
aaaf0b1e | 6397 | { |
8f924df7 | 6398 | len = SCHARS (components); |
ff0dacd7 KH |
6399 | i = i_byte = 0; |
6400 | while (i < len) | |
6401 | { | |
6402 | FETCH_STRING_CHAR_ADVANCE (*buf, components, i, i_byte); | |
6403 | buf++; | |
6404 | } | |
6405 | } | |
6406 | else if (INTEGERP (components)) | |
6407 | { | |
6408 | len = 1; | |
6409 | *buf++ = XINT (components); | |
6410 | } | |
6411 | else if (CONSP (components)) | |
6412 | { | |
6413 | for (len = 0; CONSP (components); | |
6414 | len++, components = XCDR (components)) | |
6415 | *buf++ = XINT (XCAR (components)); | |
aaaf0b1e | 6416 | } |
aaaf0b1e | 6417 | else |
ff0dacd7 KH |
6418 | abort (); |
6419 | *head -= len; | |
aaaf0b1e | 6420 | } |
aaaf0b1e | 6421 | } |
ff0dacd7 KH |
6422 | |
6423 | if (find_composition (end, limit, &start, &end, &prop, | |
6424 | coding->src_object) | |
6425 | && end <= limit) | |
6426 | *stop = start; | |
6427 | else | |
6428 | *stop = limit; | |
aaaf0b1e | 6429 | } |
ff0dacd7 KH |
6430 | return buf; |
6431 | } | |
6432 | ||
6433 | ||
e1c23804 | 6434 | /* Extract an annotation datum from a text property `charset' at POS of |
ff0dacd7 KH |
6435 | CODING->src_object (buffer of string), store the data in BUF, set |
6436 | *STOP to the position where the value of `charset' property changes | |
6437 | (limiting by LIMIT), and return the address of the next element of | |
6438 | BUF. | |
6439 | ||
6440 | If the property value is nil, set *STOP to the position where the | |
6441 | property value is non-nil (limiting by LIMIT), and return BUF. */ | |
6442 | ||
6443 | static INLINE int * | |
6444 | handle_charset_annotation (pos, limit, coding, buf, stop) | |
6445 | EMACS_INT pos, limit; | |
6446 | struct coding_system *coding; | |
6447 | int *buf; | |
6448 | EMACS_INT *stop; | |
6449 | { | |
6450 | Lisp_Object val, next; | |
6451 | int id; | |
6452 | ||
6453 | val = Fget_text_property (make_number (pos), Qcharset, coding->src_object); | |
6454 | if (! NILP (val) && CHARSETP (val)) | |
6455 | id = XINT (CHARSET_SYMBOL_ID (val)); | |
6456 | else | |
6457 | id = -1; | |
69a80ea3 | 6458 | ADD_CHARSET_DATA (buf, 0, id); |
ff0dacd7 KH |
6459 | next = Fnext_single_property_change (make_number (pos), Qcharset, |
6460 | coding->src_object, | |
6461 | make_number (limit)); | |
6462 | *stop = XINT (next); | |
6463 | return buf; | |
6464 | } | |
6465 | ||
6466 | ||
df7492f9 | 6467 | static void |
09ee6fdd | 6468 | consume_chars (coding, translation_table, max_lookup) |
df7492f9 | 6469 | struct coding_system *coding; |
433f7f87 | 6470 | Lisp_Object translation_table; |
09ee6fdd | 6471 | int max_lookup; |
df7492f9 KH |
6472 | { |
6473 | int *buf = coding->charbuf; | |
ff0dacd7 | 6474 | int *buf_end = coding->charbuf + coding->charbuf_size; |
7c78e542 | 6475 | const unsigned char *src = coding->source + coding->consumed; |
4776e638 | 6476 | const unsigned char *src_end = coding->source + coding->src_bytes; |
ff0dacd7 KH |
6477 | EMACS_INT pos = coding->src_pos + coding->consumed_char; |
6478 | EMACS_INT end_pos = coding->src_pos + coding->src_chars; | |
df7492f9 KH |
6479 | int multibytep = coding->src_multibyte; |
6480 | Lisp_Object eol_type; | |
6481 | int c; | |
ff0dacd7 | 6482 | EMACS_INT stop, stop_composition, stop_charset; |
09ee6fdd | 6483 | int *lookup_buf = NULL; |
433f7f87 KH |
6484 | |
6485 | if (! NILP (translation_table)) | |
09ee6fdd | 6486 | lookup_buf = alloca (sizeof (int) * max_lookup); |
88993dfd | 6487 | |
df7492f9 KH |
6488 | eol_type = CODING_ID_EOL_TYPE (coding->id); |
6489 | if (VECTORP (eol_type)) | |
6490 | eol_type = Qunix; | |
88993dfd | 6491 | |
df7492f9 KH |
6492 | /* Note: composition handling is not yet implemented. */ |
6493 | coding->common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
ec6d2bb8 | 6494 | |
0b5670c9 KH |
6495 | if (NILP (coding->src_object)) |
6496 | stop = stop_composition = stop_charset = end_pos; | |
ff0dacd7 | 6497 | else |
0b5670c9 KH |
6498 | { |
6499 | if (coding->common_flags & CODING_ANNOTATE_COMPOSITION_MASK) | |
6500 | stop = stop_composition = pos; | |
6501 | else | |
6502 | stop = stop_composition = end_pos; | |
6503 | if (coding->common_flags & CODING_ANNOTATE_CHARSET_MASK) | |
6504 | stop = stop_charset = pos; | |
6505 | else | |
6506 | stop_charset = end_pos; | |
6507 | } | |
ec6d2bb8 | 6508 | |
24a73b0a | 6509 | /* Compensate for CRLF and conversion. */ |
ff0dacd7 | 6510 | buf_end -= 1 + MAX_ANNOTATION_LENGTH; |
df7492f9 | 6511 | while (buf < buf_end) |
aaaf0b1e | 6512 | { |
433f7f87 KH |
6513 | Lisp_Object trans; |
6514 | ||
df7492f9 | 6515 | if (pos == stop) |
ec6d2bb8 | 6516 | { |
df7492f9 KH |
6517 | if (pos == end_pos) |
6518 | break; | |
ff0dacd7 KH |
6519 | if (pos == stop_composition) |
6520 | buf = handle_composition_annotation (pos, end_pos, coding, | |
6521 | buf, &stop_composition); | |
6522 | if (pos == stop_charset) | |
6523 | buf = handle_charset_annotation (pos, end_pos, coding, | |
6524 | buf, &stop_charset); | |
6525 | stop = (stop_composition < stop_charset | |
6526 | ? stop_composition : stop_charset); | |
df7492f9 KH |
6527 | } |
6528 | ||
6529 | if (! multibytep) | |
4776e638 | 6530 | { |
d3e4cb56 | 6531 | EMACS_INT bytes; |
aaaf0b1e | 6532 | |
ea29edf2 KH |
6533 | if (coding->encoder == encode_coding_raw_text) |
6534 | c = *src++, pos++; | |
6535 | else if ((bytes = MULTIBYTE_LENGTH (src, src_end)) > 0) | |
4776e638 KH |
6536 | c = STRING_CHAR_ADVANCE (src), pos += bytes; |
6537 | else | |
f03caae0 | 6538 | c = BYTE8_TO_CHAR (*src), src++, pos++; |
4776e638 | 6539 | } |
df7492f9 | 6540 | else |
4776e638 | 6541 | c = STRING_CHAR_ADVANCE (src), pos++; |
df7492f9 KH |
6542 | if ((c == '\r') && (coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) |
6543 | c = '\n'; | |
6544 | if (! EQ (eol_type, Qunix)) | |
aaaf0b1e | 6545 | { |
df7492f9 | 6546 | if (c == '\n') |
aaaf0b1e | 6547 | { |
df7492f9 KH |
6548 | if (EQ (eol_type, Qdos)) |
6549 | *buf++ = '\r'; | |
6550 | else | |
6551 | c = '\r'; | |
aaaf0b1e KH |
6552 | } |
6553 | } | |
433f7f87 | 6554 | |
e6a54062 | 6555 | trans = Qnil; |
09ee6fdd | 6556 | LOOKUP_TRANSLATION_TABLE (translation_table, c, trans); |
e6a54062 | 6557 | if (NILP (trans)) |
433f7f87 KH |
6558 | *buf++ = c; |
6559 | else | |
6560 | { | |
6561 | int from_nchars = 1, to_nchars = 1; | |
6562 | int *lookup_buf_end; | |
6563 | const unsigned char *p = src; | |
6564 | int i; | |
6565 | ||
6566 | lookup_buf[0] = c; | |
6567 | for (i = 1; i < max_lookup && p < src_end; i++) | |
6568 | lookup_buf[i] = STRING_CHAR_ADVANCE (p); | |
6569 | lookup_buf_end = lookup_buf + i; | |
6570 | trans = get_translation (trans, lookup_buf, lookup_buf_end, 1, | |
6571 | &from_nchars, &to_nchars); | |
6572 | if (EQ (trans, Qt) | |
6573 | || buf + to_nchars > buf_end) | |
6574 | break; | |
6575 | *buf++ = *lookup_buf; | |
6576 | for (i = 1; i < to_nchars; i++) | |
6577 | *buf++ = XINT (AREF (trans, i)); | |
6578 | for (i = 1; i < from_nchars; i++, pos++) | |
6579 | src += MULTIBYTE_LENGTH_NO_CHECK (src); | |
6580 | } | |
aaaf0b1e | 6581 | } |
ec6d2bb8 | 6582 | |
df7492f9 KH |
6583 | coding->consumed = src - coding->source; |
6584 | coding->consumed_char = pos - coding->src_pos; | |
6585 | coding->charbuf_used = buf - coding->charbuf; | |
6586 | coding->chars_at_source = 0; | |
aaaf0b1e KH |
6587 | } |
6588 | ||
4ed46869 | 6589 | |
df7492f9 KH |
6590 | /* Encode the text at CODING->src_object into CODING->dst_object. |
6591 | CODING->src_object is a buffer or a string. | |
6592 | CODING->dst_object is a buffer or nil. | |
6593 | ||
6594 | If CODING->src_object is a buffer, it must be the current buffer. | |
6595 | In this case, if CODING->src_pos is positive, it is a position of | |
6596 | the source text in the buffer, otherwise. the source text is in the | |
6597 | gap area of the buffer, and coding->src_pos specifies the offset of | |
6598 | the text from GPT (which must be the same as PT). If this is the | |
6599 | same buffer as CODING->dst_object, CODING->src_pos must be | |
6600 | negative and CODING should not have `pre-write-conversion'. | |
6601 | ||
6602 | If CODING->src_object is a string, CODING should not have | |
6603 | `pre-write-conversion'. | |
6604 | ||
6605 | If CODING->dst_object is a buffer, the encoded data is inserted at | |
6606 | the current point of that buffer. | |
6607 | ||
6608 | If CODING->dst_object is nil, the encoded data is placed at the | |
6609 | memory area specified by CODING->destination. */ | |
6610 | ||
6611 | static int | |
6612 | encode_coding (coding) | |
4ed46869 | 6613 | struct coding_system *coding; |
4ed46869 | 6614 | { |
df7492f9 | 6615 | Lisp_Object attrs; |
7d64c6ad | 6616 | Lisp_Object translation_table; |
09ee6fdd | 6617 | int max_lookup; |
9861e777 | 6618 | |
df7492f9 | 6619 | attrs = CODING_ID_ATTRS (coding->id); |
ea29edf2 KH |
6620 | if (coding->encoder == encode_coding_raw_text) |
6621 | translation_table = Qnil, max_lookup = 0; | |
6622 | else | |
6623 | translation_table = get_translation_table (attrs, 1, &max_lookup); | |
4ed46869 | 6624 | |
df7492f9 | 6625 | if (BUFFERP (coding->dst_object)) |
8844fa83 | 6626 | { |
df7492f9 KH |
6627 | set_buffer_internal (XBUFFER (coding->dst_object)); |
6628 | coding->dst_multibyte | |
6629 | = ! NILP (current_buffer->enable_multibyte_characters); | |
8844fa83 | 6630 | } |
4ed46869 | 6631 | |
b73bfc1c | 6632 | coding->consumed = coding->consumed_char = 0; |
df7492f9 | 6633 | coding->produced = coding->produced_char = 0; |
065e3595 | 6634 | record_conversion_result (coding, CODING_RESULT_SUCCESS); |
b73bfc1c | 6635 | coding->errors = 0; |
b73bfc1c | 6636 | |
df7492f9 | 6637 | ALLOC_CONVERSION_WORK_AREA (coding); |
4ed46869 | 6638 | |
df7492f9 KH |
6639 | do { |
6640 | coding_set_source (coding); | |
09ee6fdd | 6641 | consume_chars (coding, translation_table, max_lookup); |
df7492f9 KH |
6642 | coding_set_destination (coding); |
6643 | (*(coding->encoder)) (coding); | |
6644 | } while (coding->consumed_char < coding->src_chars); | |
6645 | ||
284201e4 | 6646 | if (BUFFERP (coding->dst_object) && coding->produced_char > 0) |
df7492f9 KH |
6647 | insert_from_gap (coding->produced_char, coding->produced); |
6648 | ||
6649 | return (coding->result); | |
ec6d2bb8 KH |
6650 | } |
6651 | ||
fb88bf2d | 6652 | |
24a73b0a KH |
6653 | /* Name (or base name) of work buffer for code conversion. */ |
6654 | static Lisp_Object Vcode_conversion_workbuf_name; | |
d46c5b12 | 6655 | |
24a73b0a KH |
6656 | /* A working buffer used by the top level conversion. Once it is |
6657 | created, it is never destroyed. It has the name | |
6658 | Vcode_conversion_workbuf_name. The other working buffers are | |
6659 | destroyed after the use is finished, and their names are modified | |
6660 | versions of Vcode_conversion_workbuf_name. */ | |
6661 | static Lisp_Object Vcode_conversion_reused_workbuf; | |
b73bfc1c | 6662 | |
24a73b0a KH |
6663 | /* 1 iff Vcode_conversion_reused_workbuf is already in use. */ |
6664 | static int reused_workbuf_in_use; | |
4ed46869 | 6665 | |
24a73b0a KH |
6666 | |
6667 | /* Return a working buffer of code convesion. MULTIBYTE specifies the | |
6668 | multibyteness of returning buffer. */ | |
b73bfc1c | 6669 | |
f6cbaf43 | 6670 | static Lisp_Object |
24a73b0a | 6671 | make_conversion_work_buffer (multibyte) |
f6cbaf43 | 6672 | int multibyte; |
df7492f9 | 6673 | { |
24a73b0a KH |
6674 | Lisp_Object name, workbuf; |
6675 | struct buffer *current; | |
4ed46869 | 6676 | |
24a73b0a | 6677 | if (reused_workbuf_in_use++) |
065e3595 KH |
6678 | { |
6679 | name = Fgenerate_new_buffer_name (Vcode_conversion_workbuf_name, Qnil); | |
6680 | workbuf = Fget_buffer_create (name); | |
6681 | } | |
df7492f9 | 6682 | else |
065e3595 KH |
6683 | { |
6684 | name = Vcode_conversion_workbuf_name; | |
6685 | workbuf = Fget_buffer_create (name); | |
6686 | if (NILP (Vcode_conversion_reused_workbuf)) | |
6687 | Vcode_conversion_reused_workbuf = workbuf; | |
6688 | } | |
24a73b0a KH |
6689 | current = current_buffer; |
6690 | set_buffer_internal (XBUFFER (workbuf)); | |
6691 | Ferase_buffer (); | |
df7492f9 | 6692 | current_buffer->undo_list = Qt; |
24a73b0a | 6693 | current_buffer->enable_multibyte_characters = multibyte ? Qt : Qnil; |
df7492f9 | 6694 | set_buffer_internal (current); |
24a73b0a | 6695 | return workbuf; |
df7492f9 | 6696 | } |
d46c5b12 | 6697 | |
24a73b0a | 6698 | |
4776e638 | 6699 | static Lisp_Object |
24a73b0a KH |
6700 | code_conversion_restore (arg) |
6701 | Lisp_Object arg; | |
4776e638 | 6702 | { |
24a73b0a | 6703 | Lisp_Object current, workbuf; |
948bdcf3 | 6704 | struct gcpro gcpro1; |
24a73b0a | 6705 | |
948bdcf3 | 6706 | GCPRO1 (arg); |
24a73b0a KH |
6707 | current = XCAR (arg); |
6708 | workbuf = XCDR (arg); | |
6709 | if (! NILP (workbuf)) | |
6710 | { | |
6711 | if (EQ (workbuf, Vcode_conversion_reused_workbuf)) | |
6712 | reused_workbuf_in_use = 0; | |
6713 | else if (! NILP (Fbuffer_live_p (workbuf))) | |
6714 | Fkill_buffer (workbuf); | |
6715 | } | |
6716 | set_buffer_internal (XBUFFER (current)); | |
948bdcf3 | 6717 | UNGCPRO; |
4776e638 KH |
6718 | return Qnil; |
6719 | } | |
b73bfc1c | 6720 | |
24a73b0a KH |
6721 | Lisp_Object |
6722 | code_conversion_save (with_work_buf, multibyte) | |
4776e638 | 6723 | int with_work_buf, multibyte; |
df7492f9 | 6724 | { |
24a73b0a | 6725 | Lisp_Object workbuf = Qnil; |
b73bfc1c | 6726 | |
4776e638 | 6727 | if (with_work_buf) |
24a73b0a KH |
6728 | workbuf = make_conversion_work_buffer (multibyte); |
6729 | record_unwind_protect (code_conversion_restore, | |
6730 | Fcons (Fcurrent_buffer (), workbuf)); | |
4776e638 | 6731 | return workbuf; |
df7492f9 | 6732 | } |
d46c5b12 | 6733 | |
df7492f9 KH |
6734 | int |
6735 | decode_coding_gap (coding, chars, bytes) | |
6736 | struct coding_system *coding; | |
6737 | EMACS_INT chars, bytes; | |
6738 | { | |
6739 | int count = specpdl_ptr - specpdl; | |
5e5c78be | 6740 | Lisp_Object attrs; |
fb88bf2d | 6741 | |
24a73b0a | 6742 | code_conversion_save (0, 0); |
ec6d2bb8 | 6743 | |
24a73b0a | 6744 | coding->src_object = Fcurrent_buffer (); |
df7492f9 KH |
6745 | coding->src_chars = chars; |
6746 | coding->src_bytes = bytes; | |
6747 | coding->src_pos = -chars; | |
6748 | coding->src_pos_byte = -bytes; | |
6749 | coding->src_multibyte = chars < bytes; | |
24a73b0a | 6750 | coding->dst_object = coding->src_object; |
df7492f9 KH |
6751 | coding->dst_pos = PT; |
6752 | coding->dst_pos_byte = PT_BYTE; | |
71c81426 | 6753 | coding->dst_multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
4ed46869 | 6754 | |
df7492f9 KH |
6755 | if (CODING_REQUIRE_DETECTION (coding)) |
6756 | detect_coding (coding); | |
8f924df7 | 6757 | |
9286b333 | 6758 | coding->mode |= CODING_MODE_LAST_BLOCK; |
287c57d7 | 6759 | current_buffer->text->inhibit_shrinking = 1; |
df7492f9 | 6760 | decode_coding (coding); |
287c57d7 | 6761 | current_buffer->text->inhibit_shrinking = 0; |
d46c5b12 | 6762 | |
5e5c78be KH |
6763 | attrs = CODING_ID_ATTRS (coding->id); |
6764 | if (! NILP (CODING_ATTR_POST_READ (attrs))) | |
b73bfc1c | 6765 | { |
5e5c78be KH |
6766 | EMACS_INT prev_Z = Z, prev_Z_BYTE = Z_BYTE; |
6767 | Lisp_Object val; | |
6768 | ||
6769 | TEMP_SET_PT_BOTH (coding->dst_pos, coding->dst_pos_byte); | |
5e5c78be KH |
6770 | val = call1 (CODING_ATTR_POST_READ (attrs), |
6771 | make_number (coding->produced_char)); | |
5e5c78be KH |
6772 | CHECK_NATNUM (val); |
6773 | coding->produced_char += Z - prev_Z; | |
6774 | coding->produced += Z_BYTE - prev_Z_BYTE; | |
b73bfc1c | 6775 | } |
4ed46869 | 6776 | |
df7492f9 | 6777 | unbind_to (count, Qnil); |
b73bfc1c KH |
6778 | return coding->result; |
6779 | } | |
52d41803 | 6780 | |
4ed46869 | 6781 | int |
df7492f9 | 6782 | encode_coding_gap (coding, chars, bytes) |
4ed46869 | 6783 | struct coding_system *coding; |
df7492f9 | 6784 | EMACS_INT chars, bytes; |
4ed46869 | 6785 | { |
df7492f9 | 6786 | int count = specpdl_ptr - specpdl; |
4ed46869 | 6787 | |
24a73b0a | 6788 | code_conversion_save (0, 0); |
4ed46869 | 6789 | |
24a73b0a | 6790 | coding->src_object = Fcurrent_buffer (); |
df7492f9 KH |
6791 | coding->src_chars = chars; |
6792 | coding->src_bytes = bytes; | |
6793 | coding->src_pos = -chars; | |
6794 | coding->src_pos_byte = -bytes; | |
6795 | coding->src_multibyte = chars < bytes; | |
6796 | coding->dst_object = coding->src_object; | |
6797 | coding->dst_pos = PT; | |
6798 | coding->dst_pos_byte = PT_BYTE; | |
4ed46869 | 6799 | |
df7492f9 | 6800 | encode_coding (coding); |
b73bfc1c | 6801 | |
df7492f9 KH |
6802 | unbind_to (count, Qnil); |
6803 | return coding->result; | |
6804 | } | |
4ed46869 | 6805 | |
d46c5b12 | 6806 | |
df7492f9 KH |
6807 | /* Decode the text in the range FROM/FROM_BYTE and TO/TO_BYTE in |
6808 | SRC_OBJECT into DST_OBJECT by coding context CODING. | |
b73bfc1c | 6809 | |
df7492f9 | 6810 | SRC_OBJECT is a buffer, a string, or Qnil. |
b73bfc1c | 6811 | |
df7492f9 KH |
6812 | If it is a buffer, the text is at point of the buffer. FROM and TO |
6813 | are positions in the buffer. | |
b73bfc1c | 6814 | |
df7492f9 KH |
6815 | If it is a string, the text is at the beginning of the string. |
6816 | FROM and TO are indices to the string. | |
4ed46869 | 6817 | |
df7492f9 KH |
6818 | If it is nil, the text is at coding->source. FROM and TO are |
6819 | indices to coding->source. | |
bb10be8b | 6820 | |
df7492f9 | 6821 | DST_OBJECT is a buffer, Qt, or Qnil. |
4ed46869 | 6822 | |
df7492f9 KH |
6823 | If it is a buffer, the decoded text is inserted at point of the |
6824 | buffer. If the buffer is the same as SRC_OBJECT, the source text | |
6825 | is deleted. | |
4ed46869 | 6826 | |
df7492f9 KH |
6827 | If it is Qt, a string is made from the decoded text, and |
6828 | set in CODING->dst_object. | |
d46c5b12 | 6829 | |
df7492f9 | 6830 | If it is Qnil, the decoded text is stored at CODING->destination. |
2cb26057 | 6831 | The caller must allocate CODING->dst_bytes bytes at |
df7492f9 KH |
6832 | CODING->destination by xmalloc. If the decoded text is longer than |
6833 | CODING->dst_bytes, CODING->destination is relocated by xrealloc. | |
6834 | */ | |
d46c5b12 | 6835 | |
df7492f9 KH |
6836 | void |
6837 | decode_coding_object (coding, src_object, from, from_byte, to, to_byte, | |
6838 | dst_object) | |
d46c5b12 | 6839 | struct coding_system *coding; |
df7492f9 KH |
6840 | Lisp_Object src_object; |
6841 | EMACS_INT from, from_byte, to, to_byte; | |
6842 | Lisp_Object dst_object; | |
d46c5b12 | 6843 | { |
df7492f9 KH |
6844 | int count = specpdl_ptr - specpdl; |
6845 | unsigned char *destination; | |
6846 | EMACS_INT dst_bytes; | |
6847 | EMACS_INT chars = to - from; | |
6848 | EMACS_INT bytes = to_byte - from_byte; | |
6849 | Lisp_Object attrs; | |
4776e638 KH |
6850 | Lisp_Object buffer; |
6851 | int saved_pt = -1, saved_pt_byte; | |
d46c5b12 | 6852 | |
4776e638 | 6853 | buffer = Fcurrent_buffer (); |
93dec019 | 6854 | |
df7492f9 | 6855 | if (NILP (dst_object)) |
d46c5b12 | 6856 | { |
df7492f9 KH |
6857 | destination = coding->destination; |
6858 | dst_bytes = coding->dst_bytes; | |
d46c5b12 | 6859 | } |
93dec019 | 6860 | |
df7492f9 KH |
6861 | coding->src_object = src_object; |
6862 | coding->src_chars = chars; | |
6863 | coding->src_bytes = bytes; | |
6864 | coding->src_multibyte = chars < bytes; | |
70ad9fc4 | 6865 | |
df7492f9 | 6866 | if (STRINGP (src_object)) |
d46c5b12 | 6867 | { |
df7492f9 KH |
6868 | coding->src_pos = from; |
6869 | coding->src_pos_byte = from_byte; | |
d46c5b12 | 6870 | } |
df7492f9 | 6871 | else if (BUFFERP (src_object)) |
88993dfd | 6872 | { |
df7492f9 KH |
6873 | set_buffer_internal (XBUFFER (src_object)); |
6874 | if (from != GPT) | |
6875 | move_gap_both (from, from_byte); | |
6876 | if (EQ (src_object, dst_object)) | |
fb88bf2d | 6877 | { |
4776e638 | 6878 | saved_pt = PT, saved_pt_byte = PT_BYTE; |
df7492f9 KH |
6879 | TEMP_SET_PT_BOTH (from, from_byte); |
6880 | del_range_both (from, from_byte, to, to_byte, 1); | |
6881 | coding->src_pos = -chars; | |
6882 | coding->src_pos_byte = -bytes; | |
fb88bf2d | 6883 | } |
df7492f9 | 6884 | else |
fb88bf2d | 6885 | { |
df7492f9 KH |
6886 | coding->src_pos = from; |
6887 | coding->src_pos_byte = from_byte; | |
fb88bf2d | 6888 | } |
88993dfd KH |
6889 | } |
6890 | ||
df7492f9 KH |
6891 | if (CODING_REQUIRE_DETECTION (coding)) |
6892 | detect_coding (coding); | |
6893 | attrs = CODING_ID_ATTRS (coding->id); | |
d46c5b12 | 6894 | |
2cb26057 KH |
6895 | if (EQ (dst_object, Qt) |
6896 | || (! NILP (CODING_ATTR_POST_READ (attrs)) | |
6897 | && NILP (dst_object))) | |
b73bfc1c | 6898 | { |
24a73b0a | 6899 | coding->dst_object = code_conversion_save (1, 1); |
df7492f9 KH |
6900 | coding->dst_pos = BEG; |
6901 | coding->dst_pos_byte = BEG_BYTE; | |
6902 | coding->dst_multibyte = 1; | |
b73bfc1c | 6903 | } |
df7492f9 | 6904 | else if (BUFFERP (dst_object)) |
d46c5b12 | 6905 | { |
24a73b0a | 6906 | code_conversion_save (0, 0); |
df7492f9 KH |
6907 | coding->dst_object = dst_object; |
6908 | coding->dst_pos = BUF_PT (XBUFFER (dst_object)); | |
6909 | coding->dst_pos_byte = BUF_PT_BYTE (XBUFFER (dst_object)); | |
6910 | coding->dst_multibyte | |
6911 | = ! NILP (XBUFFER (dst_object)->enable_multibyte_characters); | |
d46c5b12 KH |
6912 | } |
6913 | else | |
6914 | { | |
24a73b0a | 6915 | code_conversion_save (0, 0); |
df7492f9 KH |
6916 | coding->dst_object = Qnil; |
6917 | coding->dst_multibyte = 1; | |
d46c5b12 KH |
6918 | } |
6919 | ||
df7492f9 | 6920 | decode_coding (coding); |
fa46990e | 6921 | |
df7492f9 KH |
6922 | if (BUFFERP (coding->dst_object)) |
6923 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
d46c5b12 | 6924 | |
df7492f9 | 6925 | if (! NILP (CODING_ATTR_POST_READ (attrs))) |
d46c5b12 | 6926 | { |
df7492f9 KH |
6927 | struct gcpro gcpro1, gcpro2; |
6928 | EMACS_INT prev_Z = Z, prev_Z_BYTE = Z_BYTE; | |
2b4f9037 | 6929 | Lisp_Object val; |
d46c5b12 | 6930 | |
c0cc7f7f | 6931 | TEMP_SET_PT_BOTH (coding->dst_pos, coding->dst_pos_byte); |
df7492f9 | 6932 | GCPRO2 (coding->src_object, coding->dst_object); |
d4850d67 KH |
6933 | val = safe_call1 (CODING_ATTR_POST_READ (attrs), |
6934 | make_number (coding->produced_char)); | |
df7492f9 KH |
6935 | UNGCPRO; |
6936 | CHECK_NATNUM (val); | |
6937 | coding->produced_char += Z - prev_Z; | |
6938 | coding->produced += Z_BYTE - prev_Z_BYTE; | |
d46c5b12 | 6939 | } |
de79a6a5 | 6940 | |
df7492f9 | 6941 | if (EQ (dst_object, Qt)) |
ec6d2bb8 | 6942 | { |
df7492f9 KH |
6943 | coding->dst_object = Fbuffer_string (); |
6944 | } | |
6945 | else if (NILP (dst_object) && BUFFERP (coding->dst_object)) | |
6946 | { | |
6947 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
6948 | if (dst_bytes < coding->produced) | |
6949 | { | |
6950 | destination | |
6951 | = (unsigned char *) xrealloc (destination, coding->produced); | |
6952 | if (! destination) | |
6953 | { | |
065e3595 KH |
6954 | record_conversion_result (coding, |
6955 | CODING_RESULT_INSUFFICIENT_DST); | |
df7492f9 KH |
6956 | unbind_to (count, Qnil); |
6957 | return; | |
6958 | } | |
6959 | if (BEGV < GPT && GPT < BEGV + coding->produced_char) | |
6960 | move_gap_both (BEGV, BEGV_BYTE); | |
6961 | bcopy (BEGV_ADDR, destination, coding->produced); | |
6962 | coding->destination = destination; | |
d46c5b12 | 6963 | } |
ec6d2bb8 | 6964 | } |
b73bfc1c | 6965 | |
4776e638 KH |
6966 | if (saved_pt >= 0) |
6967 | { | |
6968 | /* This is the case of: | |
6969 | (BUFFERP (src_object) && EQ (src_object, dst_object)) | |
6970 | As we have moved PT while replacing the original buffer | |
6971 | contents, we must recover it now. */ | |
6972 | set_buffer_internal (XBUFFER (src_object)); | |
6973 | if (saved_pt < from) | |
6974 | TEMP_SET_PT_BOTH (saved_pt, saved_pt_byte); | |
6975 | else if (saved_pt < from + chars) | |
6976 | TEMP_SET_PT_BOTH (from, from_byte); | |
6977 | else if (! NILP (current_buffer->enable_multibyte_characters)) | |
6978 | TEMP_SET_PT_BOTH (saved_pt + (coding->produced_char - chars), | |
6979 | saved_pt_byte + (coding->produced - bytes)); | |
6980 | else | |
6981 | TEMP_SET_PT_BOTH (saved_pt + (coding->produced - bytes), | |
6982 | saved_pt_byte + (coding->produced - bytes)); | |
d46c5b12 | 6983 | } |
4776e638 | 6984 | |
065e3595 | 6985 | unbind_to (count, coding->dst_object); |
d46c5b12 KH |
6986 | } |
6987 | ||
d46c5b12 | 6988 | |
df7492f9 KH |
6989 | void |
6990 | encode_coding_object (coding, src_object, from, from_byte, to, to_byte, | |
6991 | dst_object) | |
d46c5b12 | 6992 | struct coding_system *coding; |
df7492f9 KH |
6993 | Lisp_Object src_object; |
6994 | EMACS_INT from, from_byte, to, to_byte; | |
6995 | Lisp_Object dst_object; | |
d46c5b12 | 6996 | { |
b73bfc1c | 6997 | int count = specpdl_ptr - specpdl; |
df7492f9 KH |
6998 | EMACS_INT chars = to - from; |
6999 | EMACS_INT bytes = to_byte - from_byte; | |
7000 | Lisp_Object attrs; | |
4776e638 KH |
7001 | Lisp_Object buffer; |
7002 | int saved_pt = -1, saved_pt_byte; | |
c02d943b | 7003 | int kill_src_buffer = 0; |
df7492f9 | 7004 | |
4776e638 | 7005 | buffer = Fcurrent_buffer (); |
df7492f9 KH |
7006 | |
7007 | coding->src_object = src_object; | |
7008 | coding->src_chars = chars; | |
7009 | coding->src_bytes = bytes; | |
7010 | coding->src_multibyte = chars < bytes; | |
7011 | ||
7012 | attrs = CODING_ID_ATTRS (coding->id); | |
7013 | ||
7014 | if (! NILP (CODING_ATTR_PRE_WRITE (attrs))) | |
6bac5b12 | 7015 | { |
24a73b0a | 7016 | coding->src_object = code_conversion_save (1, coding->src_multibyte); |
df7492f9 KH |
7017 | set_buffer_internal (XBUFFER (coding->src_object)); |
7018 | if (STRINGP (src_object)) | |
7019 | insert_from_string (src_object, from, from_byte, chars, bytes, 0); | |
7020 | else if (BUFFERP (src_object)) | |
7021 | insert_from_buffer (XBUFFER (src_object), from, chars, 0); | |
7022 | else | |
7023 | insert_1_both (coding->source + from, chars, bytes, 0, 0, 0); | |
d46c5b12 | 7024 | |
df7492f9 KH |
7025 | if (EQ (src_object, dst_object)) |
7026 | { | |
7027 | set_buffer_internal (XBUFFER (src_object)); | |
4776e638 | 7028 | saved_pt = PT, saved_pt_byte = PT_BYTE; |
df7492f9 KH |
7029 | del_range_both (from, from_byte, to, to_byte, 1); |
7030 | set_buffer_internal (XBUFFER (coding->src_object)); | |
7031 | } | |
7032 | ||
d4850d67 KH |
7033 | { |
7034 | Lisp_Object args[3]; | |
7035 | ||
7036 | args[0] = CODING_ATTR_PRE_WRITE (attrs); | |
7037 | args[1] = make_number (BEG); | |
7038 | args[2] = make_number (Z); | |
7039 | safe_call (3, args); | |
7040 | } | |
c02d943b KH |
7041 | if (XBUFFER (coding->src_object) != current_buffer) |
7042 | kill_src_buffer = 1; | |
ac87bbef | 7043 | coding->src_object = Fcurrent_buffer (); |
df7492f9 KH |
7044 | if (BEG != GPT) |
7045 | move_gap_both (BEG, BEG_BYTE); | |
7046 | coding->src_chars = Z - BEG; | |
7047 | coding->src_bytes = Z_BYTE - BEG_BYTE; | |
7048 | coding->src_pos = BEG; | |
7049 | coding->src_pos_byte = BEG_BYTE; | |
7050 | coding->src_multibyte = Z < Z_BYTE; | |
7051 | } | |
7052 | else if (STRINGP (src_object)) | |
d46c5b12 | 7053 | { |
24a73b0a | 7054 | code_conversion_save (0, 0); |
df7492f9 KH |
7055 | coding->src_pos = from; |
7056 | coding->src_pos_byte = from_byte; | |
b73bfc1c | 7057 | } |
df7492f9 | 7058 | else if (BUFFERP (src_object)) |
b73bfc1c | 7059 | { |
24a73b0a | 7060 | code_conversion_save (0, 0); |
df7492f9 | 7061 | set_buffer_internal (XBUFFER (src_object)); |
df7492f9 | 7062 | if (EQ (src_object, dst_object)) |
d46c5b12 | 7063 | { |
4776e638 | 7064 | saved_pt = PT, saved_pt_byte = PT_BYTE; |
ff0dacd7 KH |
7065 | coding->src_object = del_range_1 (from, to, 1, 1); |
7066 | coding->src_pos = 0; | |
7067 | coding->src_pos_byte = 0; | |
d46c5b12 | 7068 | } |
df7492f9 | 7069 | else |
d46c5b12 | 7070 | { |
ff0dacd7 KH |
7071 | if (from < GPT && to >= GPT) |
7072 | move_gap_both (from, from_byte); | |
df7492f9 KH |
7073 | coding->src_pos = from; |
7074 | coding->src_pos_byte = from_byte; | |
d46c5b12 | 7075 | } |
d46c5b12 | 7076 | } |
4776e638 | 7077 | else |
24a73b0a | 7078 | code_conversion_save (0, 0); |
d46c5b12 | 7079 | |
df7492f9 | 7080 | if (BUFFERP (dst_object)) |
88993dfd | 7081 | { |
df7492f9 | 7082 | coding->dst_object = dst_object; |
28f67a95 KH |
7083 | if (EQ (src_object, dst_object)) |
7084 | { | |
7085 | coding->dst_pos = from; | |
7086 | coding->dst_pos_byte = from_byte; | |
7087 | } | |
7088 | else | |
7089 | { | |
7090 | coding->dst_pos = BUF_PT (XBUFFER (dst_object)); | |
7091 | coding->dst_pos_byte = BUF_PT_BYTE (XBUFFER (dst_object)); | |
7092 | } | |
df7492f9 KH |
7093 | coding->dst_multibyte |
7094 | = ! NILP (XBUFFER (dst_object)->enable_multibyte_characters); | |
88993dfd | 7095 | } |
df7492f9 | 7096 | else if (EQ (dst_object, Qt)) |
d46c5b12 | 7097 | { |
df7492f9 | 7098 | coding->dst_object = Qnil; |
df7492f9 | 7099 | coding->dst_bytes = coding->src_chars; |
ac87bbef KH |
7100 | if (coding->dst_bytes == 0) |
7101 | coding->dst_bytes = 1; | |
7102 | coding->destination = (unsigned char *) xmalloc (coding->dst_bytes); | |
df7492f9 | 7103 | coding->dst_multibyte = 0; |
d46c5b12 KH |
7104 | } |
7105 | else | |
7106 | { | |
df7492f9 KH |
7107 | coding->dst_object = Qnil; |
7108 | coding->dst_multibyte = 0; | |
d46c5b12 KH |
7109 | } |
7110 | ||
df7492f9 | 7111 | encode_coding (coding); |
d46c5b12 | 7112 | |
df7492f9 | 7113 | if (EQ (dst_object, Qt)) |
d46c5b12 | 7114 | { |
df7492f9 KH |
7115 | if (BUFFERP (coding->dst_object)) |
7116 | coding->dst_object = Fbuffer_string (); | |
7117 | else | |
d46c5b12 | 7118 | { |
df7492f9 KH |
7119 | coding->dst_object |
7120 | = make_unibyte_string ((char *) coding->destination, | |
7121 | coding->produced); | |
7122 | xfree (coding->destination); | |
d46c5b12 | 7123 | } |
4ed46869 | 7124 | } |
d46c5b12 | 7125 | |
4776e638 KH |
7126 | if (saved_pt >= 0) |
7127 | { | |
7128 | /* This is the case of: | |
7129 | (BUFFERP (src_object) && EQ (src_object, dst_object)) | |
7130 | As we have moved PT while replacing the original buffer | |
7131 | contents, we must recover it now. */ | |
7132 | set_buffer_internal (XBUFFER (src_object)); | |
7133 | if (saved_pt < from) | |
7134 | TEMP_SET_PT_BOTH (saved_pt, saved_pt_byte); | |
7135 | else if (saved_pt < from + chars) | |
7136 | TEMP_SET_PT_BOTH (from, from_byte); | |
7137 | else if (! NILP (current_buffer->enable_multibyte_characters)) | |
7138 | TEMP_SET_PT_BOTH (saved_pt + (coding->produced_char - chars), | |
7139 | saved_pt_byte + (coding->produced - bytes)); | |
d46c5b12 | 7140 | else |
4776e638 KH |
7141 | TEMP_SET_PT_BOTH (saved_pt + (coding->produced - bytes), |
7142 | saved_pt_byte + (coding->produced - bytes)); | |
7143 | } | |
7144 | ||
c02d943b KH |
7145 | if (kill_src_buffer) |
7146 | Fkill_buffer (coding->src_object); | |
df7492f9 | 7147 | unbind_to (count, Qnil); |
b73bfc1c KH |
7148 | } |
7149 | ||
df7492f9 | 7150 | |
b73bfc1c | 7151 | Lisp_Object |
df7492f9 | 7152 | preferred_coding_system () |
b73bfc1c | 7153 | { |
df7492f9 | 7154 | int id = coding_categories[coding_priorities[0]].id; |
2391eaa4 | 7155 | |
df7492f9 | 7156 | return CODING_ID_NAME (id); |
4ed46869 KH |
7157 | } |
7158 | ||
7159 | \f | |
7160 | #ifdef emacs | |
1397dc18 | 7161 | /*** 8. Emacs Lisp library functions ***/ |
4ed46869 | 7162 | |
4ed46869 | 7163 | DEFUN ("coding-system-p", Fcoding_system_p, Scoding_system_p, 1, 1, 0, |
48b0f3ae | 7164 | doc: /* Return t if OBJECT is nil or a coding-system. |
df7492f9 | 7165 | See the documentation of `define-coding-system' for information |
48b0f3ae PJ |
7166 | about coding-system objects. */) |
7167 | (obj) | |
4ed46869 KH |
7168 | Lisp_Object obj; |
7169 | { | |
44e8490d KH |
7170 | if (NILP (obj) |
7171 | || CODING_SYSTEM_ID (obj) >= 0) | |
7172 | return Qt; | |
7173 | if (! SYMBOLP (obj) | |
7174 | || NILP (Fget (obj, Qcoding_system_define_form))) | |
7175 | return Qnil; | |
7176 | return Qt; | |
4ed46869 KH |
7177 | } |
7178 | ||
9d991de8 RS |
7179 | DEFUN ("read-non-nil-coding-system", Fread_non_nil_coding_system, |
7180 | Sread_non_nil_coding_system, 1, 1, 0, | |
48b0f3ae PJ |
7181 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. */) |
7182 | (prompt) | |
4ed46869 KH |
7183 | Lisp_Object prompt; |
7184 | { | |
e0e989f6 | 7185 | Lisp_Object val; |
9d991de8 RS |
7186 | do |
7187 | { | |
4608c386 KH |
7188 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
7189 | Qt, Qnil, Qcoding_system_history, Qnil, Qnil); | |
9d991de8 | 7190 | } |
8f924df7 | 7191 | while (SCHARS (val) == 0); |
e0e989f6 | 7192 | return (Fintern (val, Qnil)); |
4ed46869 KH |
7193 | } |
7194 | ||
9b787f3e | 7195 | DEFUN ("read-coding-system", Fread_coding_system, Sread_coding_system, 1, 2, 0, |
48b0f3ae PJ |
7196 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. |
7197 | If the user enters null input, return second argument DEFAULT-CODING-SYSTEM. */) | |
7198 | (prompt, default_coding_system) | |
9b787f3e | 7199 | Lisp_Object prompt, default_coding_system; |
4ed46869 | 7200 | { |
f44d27ce | 7201 | Lisp_Object val; |
9b787f3e | 7202 | if (SYMBOLP (default_coding_system)) |
a3181084 | 7203 | XSETSTRING (default_coding_system, XPNTR (SYMBOL_NAME (default_coding_system))); |
4608c386 | 7204 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
9b787f3e RS |
7205 | Qt, Qnil, Qcoding_system_history, |
7206 | default_coding_system, Qnil); | |
8f924df7 | 7207 | return (SCHARS (val) == 0 ? Qnil : Fintern (val, Qnil)); |
4ed46869 KH |
7208 | } |
7209 | ||
7210 | DEFUN ("check-coding-system", Fcheck_coding_system, Scheck_coding_system, | |
7211 | 1, 1, 0, | |
48b0f3ae | 7212 | doc: /* Check validity of CODING-SYSTEM. |
9ffd559c KH |
7213 | If valid, return CODING-SYSTEM, else signal a `coding-system-error' error. |
7214 | It is valid if it is nil or a symbol defined as a coding system by the | |
7215 | function `define-coding-system'. */) | |
df7492f9 | 7216 | (coding_system) |
4ed46869 KH |
7217 | Lisp_Object coding_system; |
7218 | { | |
44e8490d KH |
7219 | Lisp_Object define_form; |
7220 | ||
7221 | define_form = Fget (coding_system, Qcoding_system_define_form); | |
7222 | if (! NILP (define_form)) | |
7223 | { | |
7224 | Fput (coding_system, Qcoding_system_define_form, Qnil); | |
7225 | safe_eval (define_form); | |
7226 | } | |
4ed46869 KH |
7227 | if (!NILP (Fcoding_system_p (coding_system))) |
7228 | return coding_system; | |
fcad4ec4 | 7229 | xsignal1 (Qcoding_system_error, coding_system); |
4ed46869 | 7230 | } |
df7492f9 | 7231 | |
3a73fa5d | 7232 | \f |
89528eb3 KH |
7233 | /* Detect how the bytes at SRC of length SRC_BYTES are encoded. If |
7234 | HIGHEST is nonzero, return the coding system of the highest | |
7235 | priority among the detected coding systems. Otherwize return a | |
7236 | list of detected coding systems sorted by their priorities. If | |
7237 | MULTIBYTEP is nonzero, it is assumed that the bytes are in correct | |
7238 | multibyte form but contains only ASCII and eight-bit chars. | |
7239 | Otherwise, the bytes are raw bytes. | |
7240 | ||
7241 | CODING-SYSTEM controls the detection as below: | |
7242 | ||
7243 | If it is nil, detect both text-format and eol-format. If the | |
7244 | text-format part of CODING-SYSTEM is already specified | |
7245 | (e.g. `iso-latin-1'), detect only eol-format. If the eol-format | |
7246 | part of CODING-SYSTEM is already specified (e.g. `undecided-unix'), | |
7247 | detect only text-format. */ | |
7248 | ||
d46c5b12 | 7249 | Lisp_Object |
24a73b0a KH |
7250 | detect_coding_system (src, src_chars, src_bytes, highest, multibytep, |
7251 | coding_system) | |
8f924df7 | 7252 | const unsigned char *src; |
24a73b0a | 7253 | int src_chars, src_bytes, highest; |
0a28aafb | 7254 | int multibytep; |
df7492f9 | 7255 | Lisp_Object coding_system; |
4ed46869 | 7256 | { |
8f924df7 | 7257 | const unsigned char *src_end = src + src_bytes; |
df7492f9 KH |
7258 | Lisp_Object attrs, eol_type; |
7259 | Lisp_Object val; | |
7260 | struct coding_system coding; | |
89528eb3 | 7261 | int id; |
ff0dacd7 | 7262 | struct coding_detection_info detect_info; |
24a73b0a | 7263 | enum coding_category base_category; |
b73bfc1c | 7264 | |
df7492f9 KH |
7265 | if (NILP (coding_system)) |
7266 | coding_system = Qundecided; | |
7267 | setup_coding_system (coding_system, &coding); | |
7268 | attrs = CODING_ID_ATTRS (coding.id); | |
7269 | eol_type = CODING_ID_EOL_TYPE (coding.id); | |
89528eb3 | 7270 | coding_system = CODING_ATTR_BASE_NAME (attrs); |
4ed46869 | 7271 | |
df7492f9 | 7272 | coding.source = src; |
24a73b0a | 7273 | coding.src_chars = src_chars; |
df7492f9 KH |
7274 | coding.src_bytes = src_bytes; |
7275 | coding.src_multibyte = multibytep; | |
7276 | coding.consumed = 0; | |
89528eb3 | 7277 | coding.mode |= CODING_MODE_LAST_BLOCK; |
d46c5b12 | 7278 | |
ff0dacd7 | 7279 | detect_info.checked = detect_info.found = detect_info.rejected = 0; |
d46c5b12 | 7280 | |
89528eb3 | 7281 | /* At first, detect text-format if necessary. */ |
24a73b0a KH |
7282 | base_category = XINT (CODING_ATTR_CATEGORY (attrs)); |
7283 | if (base_category == coding_category_undecided) | |
4ed46869 | 7284 | { |
ff0dacd7 KH |
7285 | enum coding_category category; |
7286 | struct coding_system *this; | |
7287 | int c, i; | |
88993dfd | 7288 | |
24a73b0a KH |
7289 | /* Skip all ASCII bytes except for a few ISO2022 controls. */ |
7290 | for (i = 0; src < src_end; i++, src++) | |
4ed46869 | 7291 | { |
df7492f9 | 7292 | c = *src; |
6cb21a4f | 7293 | if (c & 0x80) |
d46c5b12 | 7294 | break; |
6cb21a4f KH |
7295 | if (c < 0x20 |
7296 | && (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) | |
c7266f4a | 7297 | && ! inhibit_iso_escape_detection) |
6cb21a4f KH |
7298 | { |
7299 | coding.head_ascii = src - coding.source; | |
7300 | if (detect_coding_iso_2022 (&coding, &detect_info)) | |
7301 | { | |
7302 | /* We have scanned the whole data. */ | |
7303 | if (! (detect_info.rejected & CATEGORY_MASK_ISO_7_ELSE)) | |
7304 | /* We didn't find an 8-bit code. */ | |
7305 | src = src_end; | |
7306 | break; | |
7307 | } | |
7308 | } | |
4ed46869 | 7309 | } |
df7492f9 | 7310 | coding.head_ascii = src - coding.source; |
88993dfd | 7311 | |
6cb21a4f KH |
7312 | if (src < src_end |
7313 | || detect_info.found) | |
7314 | { | |
7315 | if (src == src_end) | |
7316 | /* As all bytes are 7-bit, we can ignore non-ISO-2022 codings. */ | |
7317 | for (i = 0; i < coding_category_raw_text; i++) | |
ff0dacd7 | 7318 | { |
6cb21a4f | 7319 | category = coding_priorities[i]; |
c7266f4a | 7320 | this = coding_categories + category; |
6cb21a4f | 7321 | if (detect_info.found & (1 << category)) |
ff0dacd7 KH |
7322 | break; |
7323 | } | |
6cb21a4f KH |
7324 | else |
7325 | for (i = 0; i < coding_category_raw_text; i++) | |
df7492f9 | 7326 | { |
6cb21a4f KH |
7327 | category = coding_priorities[i]; |
7328 | this = coding_categories + category; | |
7329 | ||
7330 | if (this->id < 0) | |
24a73b0a | 7331 | { |
6cb21a4f KH |
7332 | /* No coding system of this category is defined. */ |
7333 | detect_info.rejected |= (1 << category); | |
7334 | } | |
7335 | else if (category >= coding_category_raw_text) | |
7336 | continue; | |
7337 | else if (detect_info.checked & (1 << category)) | |
7338 | { | |
7339 | if (highest | |
7340 | && (detect_info.found & (1 << category))) | |
7341 | break; | |
7342 | } | |
7343 | else | |
7344 | { | |
7345 | if ((*(this->detector)) (&coding, &detect_info) | |
7346 | && highest | |
7347 | && (detect_info.found & (1 << category))) | |
24a73b0a | 7348 | { |
6cb21a4f KH |
7349 | if (category == coding_category_utf_16_auto) |
7350 | { | |
7351 | if (detect_info.found & CATEGORY_MASK_UTF_16_LE) | |
7352 | category = coding_category_utf_16_le; | |
7353 | else | |
7354 | category = coding_category_utf_16_be; | |
7355 | } | |
7356 | break; | |
24a73b0a | 7357 | } |
24a73b0a | 7358 | } |
df7492f9 | 7359 | } |
6cb21a4f | 7360 | } |
ec6d2bb8 | 7361 | |
ff0dacd7 | 7362 | if (detect_info.rejected == CATEGORY_MASK_ANY) |
ec6d2bb8 | 7363 | { |
ff0dacd7 | 7364 | detect_info.found = CATEGORY_MASK_RAW_TEXT; |
89528eb3 KH |
7365 | id = coding_categories[coding_category_raw_text].id; |
7366 | val = Fcons (make_number (id), Qnil); | |
7367 | } | |
ff0dacd7 | 7368 | else if (! detect_info.rejected && ! detect_info.found) |
89528eb3 | 7369 | { |
ff0dacd7 | 7370 | detect_info.found = CATEGORY_MASK_ANY; |
89528eb3 KH |
7371 | id = coding_categories[coding_category_undecided].id; |
7372 | val = Fcons (make_number (id), Qnil); | |
7373 | } | |
7374 | else if (highest) | |
7375 | { | |
ff0dacd7 | 7376 | if (detect_info.found) |
ec6d2bb8 | 7377 | { |
ff0dacd7 KH |
7378 | detect_info.found = 1 << category; |
7379 | val = Fcons (make_number (this->id), Qnil); | |
7380 | } | |
7381 | else | |
7382 | for (i = 0; i < coding_category_raw_text; i++) | |
7383 | if (! (detect_info.rejected & (1 << coding_priorities[i]))) | |
7384 | { | |
7385 | detect_info.found = 1 << coding_priorities[i]; | |
7386 | id = coding_categories[coding_priorities[i]].id; | |
7387 | val = Fcons (make_number (id), Qnil); | |
7388 | break; | |
7389 | } | |
7390 | } | |
89528eb3 KH |
7391 | else |
7392 | { | |
ff0dacd7 KH |
7393 | int mask = detect_info.rejected | detect_info.found; |
7394 | int found = 0; | |
89528eb3 | 7395 | val = Qnil; |
ec6d2bb8 | 7396 | |
89528eb3 | 7397 | for (i = coding_category_raw_text - 1; i >= 0; i--) |
ff0dacd7 KH |
7398 | { |
7399 | category = coding_priorities[i]; | |
7400 | if (! (mask & (1 << category))) | |
ec6d2bb8 | 7401 | { |
ff0dacd7 KH |
7402 | found |= 1 << category; |
7403 | id = coding_categories[category].id; | |
c7266f4a KH |
7404 | if (id >= 0) |
7405 | val = Fcons (make_number (id), val); | |
ff0dacd7 KH |
7406 | } |
7407 | } | |
7408 | for (i = coding_category_raw_text - 1; i >= 0; i--) | |
7409 | { | |
7410 | category = coding_priorities[i]; | |
7411 | if (detect_info.found & (1 << category)) | |
7412 | { | |
7413 | id = coding_categories[category].id; | |
7414 | val = Fcons (make_number (id), val); | |
ec6d2bb8 | 7415 | } |
ec6d2bb8 | 7416 | } |
ff0dacd7 | 7417 | detect_info.found |= found; |
ec6d2bb8 | 7418 | } |
ec6d2bb8 | 7419 | } |
24a73b0a KH |
7420 | else if (base_category == coding_category_utf_16_auto) |
7421 | { | |
7422 | if (detect_coding_utf_16 (&coding, &detect_info)) | |
7423 | { | |
24a73b0a KH |
7424 | struct coding_system *this; |
7425 | ||
7426 | if (detect_info.found & CATEGORY_MASK_UTF_16_LE) | |
7427 | this = coding_categories + coding_category_utf_16_le; | |
7428 | else if (detect_info.found & CATEGORY_MASK_UTF_16_BE) | |
7429 | this = coding_categories + coding_category_utf_16_be; | |
7430 | else if (detect_info.rejected & CATEGORY_MASK_UTF_16_LE_NOSIG) | |
7431 | this = coding_categories + coding_category_utf_16_be_nosig; | |
7432 | else | |
7433 | this = coding_categories + coding_category_utf_16_le_nosig; | |
7434 | val = Fcons (make_number (this->id), Qnil); | |
7435 | } | |
7436 | } | |
df7492f9 KH |
7437 | else |
7438 | { | |
ff0dacd7 | 7439 | detect_info.found = 1 << XINT (CODING_ATTR_CATEGORY (attrs)); |
89528eb3 | 7440 | val = Fcons (make_number (coding.id), Qnil); |
4ed46869 | 7441 | } |
df7492f9 | 7442 | |
89528eb3 | 7443 | /* Then, detect eol-format if necessary. */ |
df7492f9 | 7444 | { |
89528eb3 | 7445 | int normal_eol = -1, utf_16_be_eol = -1, utf_16_le_eol; |
df7492f9 KH |
7446 | Lisp_Object tail; |
7447 | ||
89528eb3 KH |
7448 | if (VECTORP (eol_type)) |
7449 | { | |
ff0dacd7 | 7450 | if (detect_info.found & ~CATEGORY_MASK_UTF_16) |
89528eb3 KH |
7451 | normal_eol = detect_eol (coding.source, src_bytes, |
7452 | coding_category_raw_text); | |
ff0dacd7 KH |
7453 | if (detect_info.found & (CATEGORY_MASK_UTF_16_BE |
7454 | | CATEGORY_MASK_UTF_16_BE_NOSIG)) | |
89528eb3 KH |
7455 | utf_16_be_eol = detect_eol (coding.source, src_bytes, |
7456 | coding_category_utf_16_be); | |
ff0dacd7 KH |
7457 | if (detect_info.found & (CATEGORY_MASK_UTF_16_LE |
7458 | | CATEGORY_MASK_UTF_16_LE_NOSIG)) | |
89528eb3 KH |
7459 | utf_16_le_eol = detect_eol (coding.source, src_bytes, |
7460 | coding_category_utf_16_le); | |
7461 | } | |
7462 | else | |
7463 | { | |
7464 | if (EQ (eol_type, Qunix)) | |
7465 | normal_eol = utf_16_be_eol = utf_16_le_eol = EOL_SEEN_LF; | |
7466 | else if (EQ (eol_type, Qdos)) | |
7467 | normal_eol = utf_16_be_eol = utf_16_le_eol = EOL_SEEN_CRLF; | |
7468 | else | |
7469 | normal_eol = utf_16_be_eol = utf_16_le_eol = EOL_SEEN_CR; | |
7470 | } | |
7471 | ||
df7492f9 KH |
7472 | for (tail = val; CONSP (tail); tail = XCDR (tail)) |
7473 | { | |
89528eb3 | 7474 | enum coding_category category; |
df7492f9 | 7475 | int this_eol; |
89528eb3 KH |
7476 | |
7477 | id = XINT (XCAR (tail)); | |
7478 | attrs = CODING_ID_ATTRS (id); | |
7479 | category = XINT (CODING_ATTR_CATEGORY (attrs)); | |
7480 | eol_type = CODING_ID_EOL_TYPE (id); | |
df7492f9 KH |
7481 | if (VECTORP (eol_type)) |
7482 | { | |
89528eb3 KH |
7483 | if (category == coding_category_utf_16_be |
7484 | || category == coding_category_utf_16_be_nosig) | |
7485 | this_eol = utf_16_be_eol; | |
7486 | else if (category == coding_category_utf_16_le | |
7487 | || category == coding_category_utf_16_le_nosig) | |
7488 | this_eol = utf_16_le_eol; | |
df7492f9 | 7489 | else |
89528eb3 KH |
7490 | this_eol = normal_eol; |
7491 | ||
df7492f9 KH |
7492 | if (this_eol == EOL_SEEN_LF) |
7493 | XSETCAR (tail, AREF (eol_type, 0)); | |
7494 | else if (this_eol == EOL_SEEN_CRLF) | |
7495 | XSETCAR (tail, AREF (eol_type, 1)); | |
7496 | else if (this_eol == EOL_SEEN_CR) | |
7497 | XSETCAR (tail, AREF (eol_type, 2)); | |
89528eb3 KH |
7498 | else |
7499 | XSETCAR (tail, CODING_ID_NAME (id)); | |
df7492f9 | 7500 | } |
89528eb3 KH |
7501 | else |
7502 | XSETCAR (tail, CODING_ID_NAME (id)); | |
df7492f9 KH |
7503 | } |
7504 | } | |
ec6d2bb8 | 7505 | |
03699b14 | 7506 | return (highest ? XCAR (val) : val); |
ec6d2bb8 KH |
7507 | } |
7508 | ||
ec6d2bb8 | 7509 | |
d46c5b12 KH |
7510 | DEFUN ("detect-coding-region", Fdetect_coding_region, Sdetect_coding_region, |
7511 | 2, 3, 0, | |
48b0f3ae PJ |
7512 | doc: /* Detect coding system of the text in the region between START and END. |
7513 | Return a list of possible coding systems ordered by priority. | |
ec6d2bb8 | 7514 | |
12e0131a KH |
7515 | If only ASCII characters are found (except for such ISO-2022 control |
7516 | characters ISO-2022 as ESC), it returns a list of single element | |
48b0f3ae PJ |
7517 | `undecided' or its subsidiary coding system according to a detected |
7518 | end-of-line format. | |
ec6d2bb8 | 7519 | |
48b0f3ae PJ |
7520 | If optional argument HIGHEST is non-nil, return the coding system of |
7521 | highest priority. */) | |
7522 | (start, end, highest) | |
d46c5b12 KH |
7523 | Lisp_Object start, end, highest; |
7524 | { | |
7525 | int from, to; | |
7526 | int from_byte, to_byte; | |
ec6d2bb8 | 7527 | |
b7826503 PJ |
7528 | CHECK_NUMBER_COERCE_MARKER (start); |
7529 | CHECK_NUMBER_COERCE_MARKER (end); | |
ec6d2bb8 | 7530 | |
d46c5b12 KH |
7531 | validate_region (&start, &end); |
7532 | from = XINT (start), to = XINT (end); | |
7533 | from_byte = CHAR_TO_BYTE (from); | |
7534 | to_byte = CHAR_TO_BYTE (to); | |
ec6d2bb8 | 7535 | |
d46c5b12 KH |
7536 | if (from < GPT && to >= GPT) |
7537 | move_gap_both (to, to_byte); | |
c210f766 | 7538 | |
d46c5b12 | 7539 | return detect_coding_system (BYTE_POS_ADDR (from_byte), |
24a73b0a | 7540 | to - from, to_byte - from_byte, |
0a28aafb KH |
7541 | !NILP (highest), |
7542 | !NILP (current_buffer | |
df7492f9 KH |
7543 | ->enable_multibyte_characters), |
7544 | Qnil); | |
ec6d2bb8 KH |
7545 | } |
7546 | ||
d46c5b12 KH |
7547 | DEFUN ("detect-coding-string", Fdetect_coding_string, Sdetect_coding_string, |
7548 | 1, 2, 0, | |
48b0f3ae PJ |
7549 | doc: /* Detect coding system of the text in STRING. |
7550 | Return a list of possible coding systems ordered by priority. | |
fb88bf2d | 7551 | |
12e0131a KH |
7552 | If only ASCII characters are found (except for such ISO-2022 control |
7553 | characters ISO-2022 as ESC), it returns a list of single element | |
48b0f3ae PJ |
7554 | `undecided' or its subsidiary coding system according to a detected |
7555 | end-of-line format. | |
d46c5b12 | 7556 | |
48b0f3ae PJ |
7557 | If optional argument HIGHEST is non-nil, return the coding system of |
7558 | highest priority. */) | |
7559 | (string, highest) | |
d46c5b12 KH |
7560 | Lisp_Object string, highest; |
7561 | { | |
b7826503 | 7562 | CHECK_STRING (string); |
b73bfc1c | 7563 | |
24a73b0a KH |
7564 | return detect_coding_system (SDATA (string), |
7565 | SCHARS (string), SBYTES (string), | |
8f924df7 | 7566 | !NILP (highest), STRING_MULTIBYTE (string), |
df7492f9 | 7567 | Qnil); |
4ed46869 | 7568 | } |
4ed46869 | 7569 | |
b73bfc1c | 7570 | |
df7492f9 KH |
7571 | static INLINE int |
7572 | char_encodable_p (c, attrs) | |
7573 | int c; | |
7574 | Lisp_Object attrs; | |
05e6f5dc | 7575 | { |
df7492f9 | 7576 | Lisp_Object tail; |
df7492f9 | 7577 | struct charset *charset; |
7d64c6ad | 7578 | Lisp_Object translation_table; |
d46c5b12 | 7579 | |
7d64c6ad | 7580 | translation_table = CODING_ATTR_TRANS_TBL (attrs); |
a6f87d34 | 7581 | if (! NILP (translation_table)) |
7d64c6ad | 7582 | c = translate_char (translation_table, c); |
df7492f9 KH |
7583 | for (tail = CODING_ATTR_CHARSET_LIST (attrs); |
7584 | CONSP (tail); tail = XCDR (tail)) | |
e133c8fa | 7585 | { |
df7492f9 KH |
7586 | charset = CHARSET_FROM_ID (XINT (XCAR (tail))); |
7587 | if (CHAR_CHARSET_P (c, charset)) | |
7588 | break; | |
e133c8fa | 7589 | } |
df7492f9 | 7590 | return (! NILP (tail)); |
05e6f5dc | 7591 | } |
83fa074f | 7592 | |
fb88bf2d | 7593 | |
df7492f9 KH |
7594 | /* Return a list of coding systems that safely encode the text between |
7595 | START and END. If EXCLUDE is non-nil, it is a list of coding | |
7596 | systems not to check. The returned list doesn't contain any such | |
48468dac | 7597 | coding systems. In any case, if the text contains only ASCII or is |
df7492f9 | 7598 | unibyte, return t. */ |
e077cc80 | 7599 | |
df7492f9 KH |
7600 | DEFUN ("find-coding-systems-region-internal", |
7601 | Ffind_coding_systems_region_internal, | |
7602 | Sfind_coding_systems_region_internal, 2, 3, 0, | |
7603 | doc: /* Internal use only. */) | |
7604 | (start, end, exclude) | |
7605 | Lisp_Object start, end, exclude; | |
7606 | { | |
7607 | Lisp_Object coding_attrs_list, safe_codings; | |
7608 | EMACS_INT start_byte, end_byte; | |
7c78e542 | 7609 | const unsigned char *p, *pbeg, *pend; |
df7492f9 KH |
7610 | int c; |
7611 | Lisp_Object tail, elt; | |
d46c5b12 | 7612 | |
df7492f9 KH |
7613 | if (STRINGP (start)) |
7614 | { | |
7615 | if (!STRING_MULTIBYTE (start) | |
8f924df7 | 7616 | || SCHARS (start) == SBYTES (start)) |
df7492f9 KH |
7617 | return Qt; |
7618 | start_byte = 0; | |
8f924df7 | 7619 | end_byte = SBYTES (start); |
df7492f9 KH |
7620 | } |
7621 | else | |
d46c5b12 | 7622 | { |
df7492f9 KH |
7623 | CHECK_NUMBER_COERCE_MARKER (start); |
7624 | CHECK_NUMBER_COERCE_MARKER (end); | |
7625 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) | |
7626 | args_out_of_range (start, end); | |
7627 | if (NILP (current_buffer->enable_multibyte_characters)) | |
7628 | return Qt; | |
7629 | start_byte = CHAR_TO_BYTE (XINT (start)); | |
7630 | end_byte = CHAR_TO_BYTE (XINT (end)); | |
7631 | if (XINT (end) - XINT (start) == end_byte - start_byte) | |
7632 | return Qt; | |
d46c5b12 | 7633 | |
e1c23804 | 7634 | if (XINT (start) < GPT && XINT (end) > GPT) |
d46c5b12 | 7635 | { |
e1c23804 DL |
7636 | if ((GPT - XINT (start)) < (XINT (end) - GPT)) |
7637 | move_gap_both (XINT (start), start_byte); | |
df7492f9 | 7638 | else |
e1c23804 | 7639 | move_gap_both (XINT (end), end_byte); |
d46c5b12 KH |
7640 | } |
7641 | } | |
7642 | ||
df7492f9 KH |
7643 | coding_attrs_list = Qnil; |
7644 | for (tail = Vcoding_system_list; CONSP (tail); tail = XCDR (tail)) | |
7645 | if (NILP (exclude) | |
7646 | || NILP (Fmemq (XCAR (tail), exclude))) | |
7647 | { | |
7648 | Lisp_Object attrs; | |
d46c5b12 | 7649 | |
df7492f9 KH |
7650 | attrs = AREF (CODING_SYSTEM_SPEC (XCAR (tail)), 0); |
7651 | if (EQ (XCAR (tail), CODING_ATTR_BASE_NAME (attrs)) | |
7652 | && ! EQ (CODING_ATTR_TYPE (attrs), Qundecided)) | |
7d64c6ad KH |
7653 | { |
7654 | ASET (attrs, coding_attr_trans_tbl, | |
2170c8f0 | 7655 | get_translation_table (attrs, 1, NULL)); |
7d64c6ad KH |
7656 | coding_attrs_list = Fcons (attrs, coding_attrs_list); |
7657 | } | |
df7492f9 | 7658 | } |
d46c5b12 | 7659 | |
df7492f9 | 7660 | if (STRINGP (start)) |
8f924df7 | 7661 | p = pbeg = SDATA (start); |
df7492f9 KH |
7662 | else |
7663 | p = pbeg = BYTE_POS_ADDR (start_byte); | |
7664 | pend = p + (end_byte - start_byte); | |
b843d1ae | 7665 | |
df7492f9 KH |
7666 | while (p < pend && ASCII_BYTE_P (*p)) p++; |
7667 | while (p < pend && ASCII_BYTE_P (*(pend - 1))) pend--; | |
d46c5b12 | 7668 | |
05e6f5dc | 7669 | while (p < pend) |
72d1a715 | 7670 | { |
df7492f9 KH |
7671 | if (ASCII_BYTE_P (*p)) |
7672 | p++; | |
72d1a715 RS |
7673 | else |
7674 | { | |
df7492f9 | 7675 | c = STRING_CHAR_ADVANCE (p); |
12410ef1 | 7676 | |
df7492f9 KH |
7677 | charset_map_loaded = 0; |
7678 | for (tail = coding_attrs_list; CONSP (tail);) | |
7679 | { | |
7680 | elt = XCAR (tail); | |
7681 | if (NILP (elt)) | |
7682 | tail = XCDR (tail); | |
7683 | else if (char_encodable_p (c, elt)) | |
7684 | tail = XCDR (tail); | |
7685 | else if (CONSP (XCDR (tail))) | |
7686 | { | |
7687 | XSETCAR (tail, XCAR (XCDR (tail))); | |
7688 | XSETCDR (tail, XCDR (XCDR (tail))); | |
7689 | } | |
7690 | else | |
7691 | { | |
7692 | XSETCAR (tail, Qnil); | |
7693 | tail = XCDR (tail); | |
7694 | } | |
7695 | } | |
7696 | if (charset_map_loaded) | |
7697 | { | |
7698 | EMACS_INT p_offset = p - pbeg, pend_offset = pend - pbeg; | |
05e6f5dc | 7699 | |
df7492f9 | 7700 | if (STRINGP (start)) |
8f924df7 | 7701 | pbeg = SDATA (start); |
df7492f9 KH |
7702 | else |
7703 | pbeg = BYTE_POS_ADDR (start_byte); | |
7704 | p = pbeg + p_offset; | |
7705 | pend = pbeg + pend_offset; | |
7706 | } | |
7707 | } | |
ec6d2bb8 | 7708 | } |
fb88bf2d | 7709 | |
988b3759 | 7710 | safe_codings = list2 (Qraw_text, Qno_conversion); |
df7492f9 KH |
7711 | for (tail = coding_attrs_list; CONSP (tail); tail = XCDR (tail)) |
7712 | if (! NILP (XCAR (tail))) | |
7713 | safe_codings = Fcons (CODING_ATTR_BASE_NAME (XCAR (tail)), safe_codings); | |
ec6d2bb8 | 7714 | |
05e6f5dc KH |
7715 | return safe_codings; |
7716 | } | |
4956c225 | 7717 | |
d46c5b12 | 7718 | |
8f924df7 KH |
7719 | DEFUN ("unencodable-char-position", Funencodable_char_position, |
7720 | Sunencodable_char_position, 3, 5, 0, | |
7721 | doc: /* | |
7722 | Return position of first un-encodable character in a region. | |
7723 | START and END specfiy the region and CODING-SYSTEM specifies the | |
7724 | encoding to check. Return nil if CODING-SYSTEM does encode the region. | |
d46c5b12 | 7725 | |
8f924df7 KH |
7726 | If optional 4th argument COUNT is non-nil, it specifies at most how |
7727 | many un-encodable characters to search. In this case, the value is a | |
7728 | list of positions. | |
d46c5b12 | 7729 | |
8f924df7 KH |
7730 | If optional 5th argument STRING is non-nil, it is a string to search |
7731 | for un-encodable characters. In that case, START and END are indexes | |
7732 | to the string. */) | |
7733 | (start, end, coding_system, count, string) | |
7734 | Lisp_Object start, end, coding_system, count, string; | |
7735 | { | |
7736 | int n; | |
7737 | struct coding_system coding; | |
7d64c6ad | 7738 | Lisp_Object attrs, charset_list, translation_table; |
8f924df7 KH |
7739 | Lisp_Object positions; |
7740 | int from, to; | |
7741 | const unsigned char *p, *stop, *pend; | |
7742 | int ascii_compatible; | |
fb88bf2d | 7743 | |
8f924df7 KH |
7744 | setup_coding_system (Fcheck_coding_system (coding_system), &coding); |
7745 | attrs = CODING_ID_ATTRS (coding.id); | |
7746 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) | |
7747 | return Qnil; | |
7748 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); | |
7749 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
2170c8f0 | 7750 | translation_table = get_translation_table (attrs, 1, NULL); |
fb88bf2d | 7751 | |
8f924df7 KH |
7752 | if (NILP (string)) |
7753 | { | |
7754 | validate_region (&start, &end); | |
7755 | from = XINT (start); | |
7756 | to = XINT (end); | |
7757 | if (NILP (current_buffer->enable_multibyte_characters) | |
7758 | || (ascii_compatible | |
7759 | && (to - from) == (CHAR_TO_BYTE (to) - (CHAR_TO_BYTE (from))))) | |
7760 | return Qnil; | |
7761 | p = CHAR_POS_ADDR (from); | |
7762 | pend = CHAR_POS_ADDR (to); | |
7763 | if (from < GPT && to >= GPT) | |
7764 | stop = GPT_ADDR; | |
7765 | else | |
7766 | stop = pend; | |
7767 | } | |
7768 | else | |
7769 | { | |
7770 | CHECK_STRING (string); | |
7771 | CHECK_NATNUM (start); | |
7772 | CHECK_NATNUM (end); | |
7773 | from = XINT (start); | |
7774 | to = XINT (end); | |
7775 | if (from > to | |
7776 | || to > SCHARS (string)) | |
7777 | args_out_of_range_3 (string, start, end); | |
7778 | if (! STRING_MULTIBYTE (string)) | |
7779 | return Qnil; | |
7780 | p = SDATA (string) + string_char_to_byte (string, from); | |
7781 | stop = pend = SDATA (string) + string_char_to_byte (string, to); | |
7782 | if (ascii_compatible && (to - from) == (pend - p)) | |
7783 | return Qnil; | |
7784 | } | |
f2558efd | 7785 | |
8f924df7 KH |
7786 | if (NILP (count)) |
7787 | n = 1; | |
7788 | else | |
b73bfc1c | 7789 | { |
8f924df7 KH |
7790 | CHECK_NATNUM (count); |
7791 | n = XINT (count); | |
b73bfc1c KH |
7792 | } |
7793 | ||
8f924df7 KH |
7794 | positions = Qnil; |
7795 | while (1) | |
d46c5b12 | 7796 | { |
8f924df7 | 7797 | int c; |
ec6d2bb8 | 7798 | |
8f924df7 KH |
7799 | if (ascii_compatible) |
7800 | while (p < stop && ASCII_BYTE_P (*p)) | |
7801 | p++, from++; | |
7802 | if (p >= stop) | |
0e79d667 | 7803 | { |
8f924df7 KH |
7804 | if (p >= pend) |
7805 | break; | |
7806 | stop = pend; | |
7807 | p = GAP_END_ADDR; | |
0e79d667 | 7808 | } |
ec6d2bb8 | 7809 | |
8f924df7 KH |
7810 | c = STRING_CHAR_ADVANCE (p); |
7811 | if (! (ASCII_CHAR_P (c) && ascii_compatible) | |
7d64c6ad KH |
7812 | && ! char_charset (translate_char (translation_table, c), |
7813 | charset_list, NULL)) | |
ec6d2bb8 | 7814 | { |
8f924df7 KH |
7815 | positions = Fcons (make_number (from), positions); |
7816 | n--; | |
7817 | if (n == 0) | |
7818 | break; | |
ec6d2bb8 KH |
7819 | } |
7820 | ||
8f924df7 KH |
7821 | from++; |
7822 | } | |
d46c5b12 | 7823 | |
8f924df7 KH |
7824 | return (NILP (count) ? Fcar (positions) : Fnreverse (positions)); |
7825 | } | |
d46c5b12 | 7826 | |
d46c5b12 | 7827 | |
df7492f9 KH |
7828 | DEFUN ("check-coding-systems-region", Fcheck_coding_systems_region, |
7829 | Scheck_coding_systems_region, 3, 3, 0, | |
7830 | doc: /* Check if the region is encodable by coding systems. | |
d46c5b12 | 7831 | |
df7492f9 KH |
7832 | START and END are buffer positions specifying the region. |
7833 | CODING-SYSTEM-LIST is a list of coding systems to check. | |
d46c5b12 | 7834 | |
df7492f9 KH |
7835 | The value is an alist ((CODING-SYSTEM POS0 POS1 ...) ...), where |
7836 | CODING-SYSTEM is a member of CODING-SYSTEM-LIst and can't encode the | |
7837 | whole region, POS0, POS1, ... are buffer positions where non-encodable | |
7838 | characters are found. | |
93dec019 | 7839 | |
df7492f9 KH |
7840 | If all coding systems in CODING-SYSTEM-LIST can encode the region, the |
7841 | value is nil. | |
93dec019 | 7842 | |
df7492f9 KH |
7843 | START may be a string. In that case, check if the string is |
7844 | encodable, and the value contains indices to the string instead of | |
7845 | buffer positions. END is ignored. */) | |
7846 | (start, end, coding_system_list) | |
7847 | Lisp_Object start, end, coding_system_list; | |
05e6f5dc | 7848 | { |
df7492f9 KH |
7849 | Lisp_Object list; |
7850 | EMACS_INT start_byte, end_byte; | |
7851 | int pos; | |
7c78e542 | 7852 | const unsigned char *p, *pbeg, *pend; |
df7492f9 | 7853 | int c; |
7d64c6ad | 7854 | Lisp_Object tail, elt, attrs; |
70ad9fc4 | 7855 | |
05e6f5dc KH |
7856 | if (STRINGP (start)) |
7857 | { | |
df7492f9 | 7858 | if (!STRING_MULTIBYTE (start) |
8f924df7 | 7859 | && SCHARS (start) != SBYTES (start)) |
df7492f9 KH |
7860 | return Qnil; |
7861 | start_byte = 0; | |
8f924df7 | 7862 | end_byte = SBYTES (start); |
df7492f9 | 7863 | pos = 0; |
d46c5b12 | 7864 | } |
05e6f5dc | 7865 | else |
b73bfc1c | 7866 | { |
b7826503 PJ |
7867 | CHECK_NUMBER_COERCE_MARKER (start); |
7868 | CHECK_NUMBER_COERCE_MARKER (end); | |
05e6f5dc KH |
7869 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) |
7870 | args_out_of_range (start, end); | |
7871 | if (NILP (current_buffer->enable_multibyte_characters)) | |
df7492f9 KH |
7872 | return Qnil; |
7873 | start_byte = CHAR_TO_BYTE (XINT (start)); | |
7874 | end_byte = CHAR_TO_BYTE (XINT (end)); | |
7875 | if (XINT (end) - XINT (start) == end_byte - start_byte) | |
05e6f5dc | 7876 | return Qt; |
df7492f9 | 7877 | |
e1c23804 | 7878 | if (XINT (start) < GPT && XINT (end) > GPT) |
b73bfc1c | 7879 | { |
e1c23804 DL |
7880 | if ((GPT - XINT (start)) < (XINT (end) - GPT)) |
7881 | move_gap_both (XINT (start), start_byte); | |
df7492f9 | 7882 | else |
e1c23804 | 7883 | move_gap_both (XINT (end), end_byte); |
b73bfc1c | 7884 | } |
e1c23804 | 7885 | pos = XINT (start); |
b73bfc1c | 7886 | } |
7553d0e1 | 7887 | |
df7492f9 KH |
7888 | list = Qnil; |
7889 | for (tail = coding_system_list; CONSP (tail); tail = XCDR (tail)) | |
12410ef1 | 7890 | { |
df7492f9 | 7891 | elt = XCAR (tail); |
7d64c6ad | 7892 | attrs = AREF (CODING_SYSTEM_SPEC (elt), 0); |
2170c8f0 KH |
7893 | ASET (attrs, coding_attr_trans_tbl, |
7894 | get_translation_table (attrs, 1, NULL)); | |
7d64c6ad | 7895 | list = Fcons (Fcons (elt, Fcons (attrs, Qnil)), list); |
12410ef1 KH |
7896 | } |
7897 | ||
df7492f9 | 7898 | if (STRINGP (start)) |
8f924df7 | 7899 | p = pbeg = SDATA (start); |
72d1a715 | 7900 | else |
df7492f9 KH |
7901 | p = pbeg = BYTE_POS_ADDR (start_byte); |
7902 | pend = p + (end_byte - start_byte); | |
4ed46869 | 7903 | |
df7492f9 KH |
7904 | while (p < pend && ASCII_BYTE_P (*p)) p++, pos++; |
7905 | while (p < pend && ASCII_BYTE_P (*(pend - 1))) pend--; | |
ec6d2bb8 | 7906 | |
df7492f9 | 7907 | while (p < pend) |
d46c5b12 | 7908 | { |
df7492f9 KH |
7909 | if (ASCII_BYTE_P (*p)) |
7910 | p++; | |
e133c8fa | 7911 | else |
05e6f5dc | 7912 | { |
df7492f9 KH |
7913 | c = STRING_CHAR_ADVANCE (p); |
7914 | ||
7915 | charset_map_loaded = 0; | |
7916 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
7917 | { | |
7918 | elt = XCDR (XCAR (tail)); | |
7919 | if (! char_encodable_p (c, XCAR (elt))) | |
7920 | XSETCDR (elt, Fcons (make_number (pos), XCDR (elt))); | |
7921 | } | |
7922 | if (charset_map_loaded) | |
7923 | { | |
7924 | EMACS_INT p_offset = p - pbeg, pend_offset = pend - pbeg; | |
7925 | ||
7926 | if (STRINGP (start)) | |
8f924df7 | 7927 | pbeg = SDATA (start); |
df7492f9 KH |
7928 | else |
7929 | pbeg = BYTE_POS_ADDR (start_byte); | |
7930 | p = pbeg + p_offset; | |
7931 | pend = pbeg + pend_offset; | |
7932 | } | |
05e6f5dc | 7933 | } |
df7492f9 | 7934 | pos++; |
d46c5b12 | 7935 | } |
4ed46869 | 7936 | |
df7492f9 KH |
7937 | tail = list; |
7938 | list = Qnil; | |
7939 | for (; CONSP (tail); tail = XCDR (tail)) | |
ec6d2bb8 | 7940 | { |
df7492f9 KH |
7941 | elt = XCAR (tail); |
7942 | if (CONSP (XCDR (XCDR (elt)))) | |
7943 | list = Fcons (Fcons (XCAR (elt), Fnreverse (XCDR (XCDR (elt)))), | |
7944 | list); | |
ec6d2bb8 | 7945 | } |
2b4f9037 | 7946 | |
df7492f9 | 7947 | return list; |
d46c5b12 KH |
7948 | } |
7949 | ||
3fd9494b | 7950 | |
b73bfc1c | 7951 | Lisp_Object |
df7492f9 KH |
7952 | code_convert_region (start, end, coding_system, dst_object, encodep, norecord) |
7953 | Lisp_Object start, end, coding_system, dst_object; | |
7954 | int encodep, norecord; | |
4ed46869 | 7955 | { |
3a73fa5d | 7956 | struct coding_system coding; |
df7492f9 KH |
7957 | EMACS_INT from, from_byte, to, to_byte; |
7958 | Lisp_Object src_object; | |
4ed46869 | 7959 | |
b7826503 PJ |
7960 | CHECK_NUMBER_COERCE_MARKER (start); |
7961 | CHECK_NUMBER_COERCE_MARKER (end); | |
df7492f9 KH |
7962 | if (NILP (coding_system)) |
7963 | coding_system = Qno_conversion; | |
7964 | else | |
7965 | CHECK_CODING_SYSTEM (coding_system); | |
7966 | src_object = Fcurrent_buffer (); | |
7967 | if (NILP (dst_object)) | |
7968 | dst_object = src_object; | |
7969 | else if (! EQ (dst_object, Qt)) | |
7970 | CHECK_BUFFER (dst_object); | |
3a73fa5d | 7971 | |
d46c5b12 KH |
7972 | validate_region (&start, &end); |
7973 | from = XFASTINT (start); | |
df7492f9 | 7974 | from_byte = CHAR_TO_BYTE (from); |
d46c5b12 | 7975 | to = XFASTINT (end); |
df7492f9 | 7976 | to_byte = CHAR_TO_BYTE (to); |
764ca8da | 7977 | |
df7492f9 KH |
7978 | setup_coding_system (coding_system, &coding); |
7979 | coding.mode |= CODING_MODE_LAST_BLOCK; | |
ec6d2bb8 | 7980 | |
df7492f9 KH |
7981 | if (encodep) |
7982 | encode_coding_object (&coding, src_object, from, from_byte, to, to_byte, | |
7983 | dst_object); | |
7984 | else | |
7985 | decode_coding_object (&coding, src_object, from, from_byte, to, to_byte, | |
7986 | dst_object); | |
7987 | if (! norecord) | |
7988 | Vlast_coding_system_used = CODING_ID_NAME (coding.id); | |
ec6d2bb8 | 7989 | |
df7492f9 KH |
7990 | return (BUFFERP (dst_object) |
7991 | ? make_number (coding.produced_char) | |
7992 | : coding.dst_object); | |
4031e2bf | 7993 | } |
78108bcd | 7994 | |
4ed46869 | 7995 | |
4031e2bf | 7996 | DEFUN ("decode-coding-region", Fdecode_coding_region, Sdecode_coding_region, |
df7492f9 | 7997 | 3, 4, "r\nzCoding system: ", |
48b0f3ae | 7998 | doc: /* Decode the current region from the specified coding system. |
df7492f9 KH |
7999 | When called from a program, takes four arguments: |
8000 | START, END, CODING-SYSTEM, and DESTINATION. | |
8001 | START and END are buffer positions. | |
8844fa83 | 8002 | |
df7492f9 KH |
8003 | Optional 4th arguments DESTINATION specifies where the decoded text goes. |
8004 | If nil, the region between START and END is replace by the decoded text. | |
8005 | If buffer, the decoded text is inserted in the buffer. | |
8006 | If t, the decoded text is returned. | |
8844fa83 | 8007 | |
48b0f3ae PJ |
8008 | This function sets `last-coding-system-used' to the precise coding system |
8009 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
8010 | not fully specified.) | |
8011 | It returns the length of the decoded text. */) | |
df7492f9 KH |
8012 | (start, end, coding_system, destination) |
8013 | Lisp_Object start, end, coding_system, destination; | |
4031e2bf | 8014 | { |
df7492f9 | 8015 | return code_convert_region (start, end, coding_system, destination, 0, 0); |
3a73fa5d | 8016 | } |
8844fa83 | 8017 | |
3a73fa5d | 8018 | DEFUN ("encode-coding-region", Fencode_coding_region, Sencode_coding_region, |
df7492f9 KH |
8019 | 3, 4, "r\nzCoding system: ", |
8020 | doc: /* Encode the current region by specified coding system. | |
48b0f3ae PJ |
8021 | When called from a program, takes three arguments: |
8022 | START, END, and CODING-SYSTEM. START and END are buffer positions. | |
d46c5b12 | 8023 | |
df7492f9 KH |
8024 | Optional 4th arguments DESTINATION specifies where the encoded text goes. |
8025 | If nil, the region between START and END is replace by the encoded text. | |
8026 | If buffer, the encoded text is inserted in the buffer. | |
8027 | If t, the encoded text is returned. | |
2391eaa4 | 8028 | |
48b0f3ae PJ |
8029 | This function sets `last-coding-system-used' to the precise coding system |
8030 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
8031 | not fully specified.) | |
8032 | It returns the length of the encoded text. */) | |
df7492f9 KH |
8033 | (start, end, coding_system, destination) |
8034 | Lisp_Object start, end, coding_system, destination; | |
3a73fa5d | 8035 | { |
df7492f9 | 8036 | return code_convert_region (start, end, coding_system, destination, 1, 0); |
b73bfc1c KH |
8037 | } |
8038 | ||
8039 | Lisp_Object | |
df7492f9 KH |
8040 | code_convert_string (string, coding_system, dst_object, |
8041 | encodep, nocopy, norecord) | |
8042 | Lisp_Object string, coding_system, dst_object; | |
8043 | int encodep, nocopy, norecord; | |
b73bfc1c | 8044 | { |
4031e2bf | 8045 | struct coding_system coding; |
df7492f9 | 8046 | EMACS_INT chars, bytes; |
ec6d2bb8 | 8047 | |
b7826503 | 8048 | CHECK_STRING (string); |
d46c5b12 | 8049 | if (NILP (coding_system)) |
4956c225 | 8050 | { |
df7492f9 KH |
8051 | if (! norecord) |
8052 | Vlast_coding_system_used = Qno_conversion; | |
8053 | if (NILP (dst_object)) | |
8054 | return (nocopy ? Fcopy_sequence (string) : string); | |
4956c225 | 8055 | } |
b73bfc1c | 8056 | |
df7492f9 KH |
8057 | if (NILP (coding_system)) |
8058 | coding_system = Qno_conversion; | |
8059 | else | |
8060 | CHECK_CODING_SYSTEM (coding_system); | |
8061 | if (NILP (dst_object)) | |
8062 | dst_object = Qt; | |
8063 | else if (! EQ (dst_object, Qt)) | |
8064 | CHECK_BUFFER (dst_object); | |
73be902c | 8065 | |
df7492f9 | 8066 | setup_coding_system (coding_system, &coding); |
d46c5b12 | 8067 | coding.mode |= CODING_MODE_LAST_BLOCK; |
8f924df7 KH |
8068 | chars = SCHARS (string); |
8069 | bytes = SBYTES (string); | |
df7492f9 KH |
8070 | if (encodep) |
8071 | encode_coding_object (&coding, string, 0, 0, chars, bytes, dst_object); | |
8072 | else | |
8073 | decode_coding_object (&coding, string, 0, 0, chars, bytes, dst_object); | |
8074 | if (! norecord) | |
8075 | Vlast_coding_system_used = CODING_ID_NAME (coding.id); | |
73be902c | 8076 | |
df7492f9 KH |
8077 | return (BUFFERP (dst_object) |
8078 | ? make_number (coding.produced_char) | |
8079 | : coding.dst_object); | |
4ed46869 | 8080 | } |
73be902c | 8081 | |
b73bfc1c | 8082 | |
ecec61c1 | 8083 | /* Encode or decode STRING according to CODING_SYSTEM. |
ec6d2bb8 | 8084 | Do not set Vlast_coding_system_used. |
4ed46869 | 8085 | |
ec6d2bb8 KH |
8086 | This function is called only from macros DECODE_FILE and |
8087 | ENCODE_FILE, thus we ignore character composition. */ | |
4ed46869 | 8088 | |
ecec61c1 KH |
8089 | Lisp_Object |
8090 | code_convert_string_norecord (string, coding_system, encodep) | |
8091 | Lisp_Object string, coding_system; | |
8092 | int encodep; | |
4ed46869 | 8093 | { |
0be8721c | 8094 | return code_convert_string (string, coding_system, Qt, encodep, 0, 1); |
4ed46869 KH |
8095 | } |
8096 | ||
4ed46869 | 8097 | |
df7492f9 KH |
8098 | DEFUN ("decode-coding-string", Fdecode_coding_string, Sdecode_coding_string, |
8099 | 2, 4, 0, | |
8100 | doc: /* Decode STRING which is encoded in CODING-SYSTEM, and return the result. | |
8101 | ||
8102 | Optional third arg NOCOPY non-nil means it is OK to return STRING itself | |
8103 | if the decoding operation is trivial. | |
ecec61c1 | 8104 | |
df7492f9 | 8105 | Optional fourth arg BUFFER non-nil meant that the decoded text is |
a3f6ee6d | 8106 | inserted in BUFFER instead of returned as a string. In this case, |
df7492f9 | 8107 | the return value is BUFFER. |
ecec61c1 | 8108 | |
df7492f9 KH |
8109 | This function sets `last-coding-system-used' to the precise coding system |
8110 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
8111 | not fully specified. */) | |
8112 | (string, coding_system, nocopy, buffer) | |
8113 | Lisp_Object string, coding_system, nocopy, buffer; | |
4ed46869 | 8114 | { |
df7492f9 KH |
8115 | return code_convert_string (string, coding_system, buffer, |
8116 | 0, ! NILP (nocopy), 0); | |
4ed46869 KH |
8117 | } |
8118 | ||
df7492f9 KH |
8119 | DEFUN ("encode-coding-string", Fencode_coding_string, Sencode_coding_string, |
8120 | 2, 4, 0, | |
8121 | doc: /* Encode STRING to CODING-SYSTEM, and return the result. | |
8122 | ||
8123 | Optional third arg NOCOPY non-nil means it is OK to return STRING | |
8124 | itself if the encoding operation is trivial. | |
8125 | ||
8126 | Optional fourth arg BUFFER non-nil meant that the encoded text is | |
a3f6ee6d | 8127 | inserted in BUFFER instead of returned as a string. In this case, |
df7492f9 KH |
8128 | the return value is BUFFER. |
8129 | ||
8130 | This function sets `last-coding-system-used' to the precise coding system | |
8131 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
8132 | not fully specified.) */) | |
8133 | (string, coding_system, nocopy, buffer) | |
8134 | Lisp_Object string, coding_system, nocopy, buffer; | |
4ed46869 | 8135 | { |
df7492f9 | 8136 | return code_convert_string (string, coding_system, buffer, |
c197f191 | 8137 | 1, ! NILP (nocopy), 1); |
4ed46869 | 8138 | } |
df7492f9 | 8139 | |
3a73fa5d | 8140 | \f |
4ed46869 | 8141 | DEFUN ("decode-sjis-char", Fdecode_sjis_char, Sdecode_sjis_char, 1, 1, 0, |
48b0f3ae PJ |
8142 | doc: /* Decode a Japanese character which has CODE in shift_jis encoding. |
8143 | Return the corresponding character. */) | |
8144 | (code) | |
4ed46869 | 8145 | Lisp_Object code; |
4ed46869 | 8146 | { |
df7492f9 KH |
8147 | Lisp_Object spec, attrs, val; |
8148 | struct charset *charset_roman, *charset_kanji, *charset_kana, *charset; | |
8149 | int c; | |
4ed46869 | 8150 | |
df7492f9 KH |
8151 | CHECK_NATNUM (code); |
8152 | c = XFASTINT (code); | |
8153 | CHECK_CODING_SYSTEM_GET_SPEC (Vsjis_coding_system, spec); | |
8154 | attrs = AREF (spec, 0); | |
4ed46869 | 8155 | |
df7492f9 KH |
8156 | if (ASCII_BYTE_P (c) |
8157 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
8158 | return code; | |
4ed46869 | 8159 | |
df7492f9 KH |
8160 | val = CODING_ATTR_CHARSET_LIST (attrs); |
8161 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
004068e4 KH |
8162 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); |
8163 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))); | |
fa42c37f | 8164 | |
df7492f9 KH |
8165 | if (c <= 0x7F) |
8166 | charset = charset_roman; | |
8167 | else if (c >= 0xA0 && c < 0xDF) | |
55ab7be3 | 8168 | { |
df7492f9 KH |
8169 | charset = charset_kana; |
8170 | c -= 0x80; | |
4ed46869 | 8171 | } |
55ab7be3 | 8172 | else |
4ed46869 | 8173 | { |
004068e4 | 8174 | int s1 = c >> 8, s2 = c & 0xFF; |
df7492f9 KH |
8175 | |
8176 | if (s1 < 0x81 || (s1 > 0x9F && s1 < 0xE0) || s1 > 0xEF | |
8177 | || s2 < 0x40 || s2 == 0x7F || s2 > 0xFC) | |
8178 | error ("Invalid code: %d", code); | |
8179 | SJIS_TO_JIS (c); | |
8180 | charset = charset_kanji; | |
4ed46869 | 8181 | } |
df7492f9 KH |
8182 | c = DECODE_CHAR (charset, c); |
8183 | if (c < 0) | |
8184 | error ("Invalid code: %d", code); | |
8185 | return make_number (c); | |
93dec019 | 8186 | } |
4ed46869 | 8187 | |
48b0f3ae | 8188 | |
4ed46869 | 8189 | DEFUN ("encode-sjis-char", Fencode_sjis_char, Sencode_sjis_char, 1, 1, 0, |
8acf0c0e | 8190 | doc: /* Encode a Japanese character CH to shift_jis encoding. |
48b0f3ae PJ |
8191 | Return the corresponding code in SJIS. */) |
8192 | (ch) | |
df7492f9 | 8193 | Lisp_Object ch; |
4ed46869 | 8194 | { |
df7492f9 KH |
8195 | Lisp_Object spec, attrs, charset_list; |
8196 | int c; | |
8197 | struct charset *charset; | |
8198 | unsigned code; | |
48b0f3ae | 8199 | |
df7492f9 KH |
8200 | CHECK_CHARACTER (ch); |
8201 | c = XFASTINT (ch); | |
8202 | CHECK_CODING_SYSTEM_GET_SPEC (Vsjis_coding_system, spec); | |
8203 | attrs = AREF (spec, 0); | |
8204 | ||
8205 | if (ASCII_CHAR_P (c) | |
8206 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
8207 | return ch; | |
8208 | ||
8209 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
8210 | charset = char_charset (c, charset_list, &code); | |
8211 | if (code == CHARSET_INVALID_CODE (charset)) | |
8212 | error ("Can't encode by shift_jis encoding: %d", c); | |
8213 | JIS_TO_SJIS (code); | |
8214 | ||
8215 | return make_number (code); | |
4ed46869 KH |
8216 | } |
8217 | ||
8218 | DEFUN ("decode-big5-char", Fdecode_big5_char, Sdecode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
8219 | doc: /* Decode a Big5 character which has CODE in BIG5 coding system. |
8220 | Return the corresponding character. */) | |
8221 | (code) | |
4ed46869 | 8222 | Lisp_Object code; |
d46c5b12 | 8223 | { |
df7492f9 KH |
8224 | Lisp_Object spec, attrs, val; |
8225 | struct charset *charset_roman, *charset_big5, *charset; | |
8226 | int c; | |
6289dd10 | 8227 | |
df7492f9 KH |
8228 | CHECK_NATNUM (code); |
8229 | c = XFASTINT (code); | |
8230 | CHECK_CODING_SYSTEM_GET_SPEC (Vbig5_coding_system, spec); | |
8231 | attrs = AREF (spec, 0); | |
4ed46869 | 8232 | |
df7492f9 KH |
8233 | if (ASCII_BYTE_P (c) |
8234 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
8235 | return code; | |
6289dd10 | 8236 | |
df7492f9 KH |
8237 | val = CODING_ATTR_CHARSET_LIST (attrs); |
8238 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
8239 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
c210f766 | 8240 | |
df7492f9 KH |
8241 | if (c <= 0x7F) |
8242 | charset = charset_roman; | |
c28a9453 KH |
8243 | else |
8244 | { | |
df7492f9 KH |
8245 | int b1 = c >> 8, b2 = c & 0x7F; |
8246 | if (b1 < 0xA1 || b1 > 0xFE | |
8247 | || b2 < 0x40 || (b2 > 0x7E && b2 < 0xA1) || b2 > 0xFE) | |
8248 | error ("Invalid code: %d", code); | |
8249 | charset = charset_big5; | |
c28a9453 | 8250 | } |
df7492f9 KH |
8251 | c = DECODE_CHAR (charset, (unsigned )c); |
8252 | if (c < 0) | |
8253 | error ("Invalid code: %d", code); | |
8254 | return make_number (c); | |
d46c5b12 | 8255 | } |
6289dd10 | 8256 | |
4ed46869 | 8257 | DEFUN ("encode-big5-char", Fencode_big5_char, Sencode_big5_char, 1, 1, 0, |
8acf0c0e | 8258 | doc: /* Encode the Big5 character CH to BIG5 coding system. |
48b0f3ae PJ |
8259 | Return the corresponding character code in Big5. */) |
8260 | (ch) | |
4ed46869 KH |
8261 | Lisp_Object ch; |
8262 | { | |
df7492f9 KH |
8263 | Lisp_Object spec, attrs, charset_list; |
8264 | struct charset *charset; | |
8265 | int c; | |
8266 | unsigned code; | |
8267 | ||
8268 | CHECK_CHARACTER (ch); | |
8269 | c = XFASTINT (ch); | |
8270 | CHECK_CODING_SYSTEM_GET_SPEC (Vbig5_coding_system, spec); | |
8271 | attrs = AREF (spec, 0); | |
8272 | if (ASCII_CHAR_P (c) | |
8273 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
8274 | return ch; | |
8275 | ||
8276 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
8277 | charset = char_charset (c, charset_list, &code); | |
8278 | if (code == CHARSET_INVALID_CODE (charset)) | |
8279 | error ("Can't encode by Big5 encoding: %d", c); | |
8280 | ||
8281 | return make_number (code); | |
4ed46869 | 8282 | } |
48b0f3ae | 8283 | |
3a73fa5d | 8284 | \f |
002fdb44 | 8285 | DEFUN ("set-terminal-coding-system-internal", Fset_terminal_coding_system_internal, |
68bba4e4 | 8286 | Sset_terminal_coding_system_internal, 1, 2, 0, |
48b0f3ae | 8287 | doc: /* Internal use only. */) |
6ed8eeff | 8288 | (coding_system, terminal) |
b74e4686 | 8289 | Lisp_Object coding_system; |
6ed8eeff | 8290 | Lisp_Object terminal; |
4ed46869 | 8291 | { |
6ed8eeff | 8292 | struct coding_system *terminal_coding = TERMINAL_TERMINAL_CODING (get_terminal (terminal, 1)); |
b7826503 | 8293 | CHECK_SYMBOL (coding_system); |
b8299c66 | 8294 | setup_coding_system (Fcheck_coding_system (coding_system), terminal_coding); |
70c22245 | 8295 | /* We had better not send unsafe characters to terminal. */ |
c73bd236 | 8296 | terminal_coding->mode |= CODING_MODE_SAFE_ENCODING; |
df7492f9 | 8297 | /* Characer composition should be disabled. */ |
c73bd236 | 8298 | terminal_coding->common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; |
b8299c66 KL |
8299 | terminal_coding->src_multibyte = 1; |
8300 | terminal_coding->dst_multibyte = 0; | |
4ed46869 KH |
8301 | return Qnil; |
8302 | } | |
8303 | ||
c4825358 KH |
8304 | DEFUN ("set-safe-terminal-coding-system-internal", |
8305 | Fset_safe_terminal_coding_system_internal, | |
48b0f3ae | 8306 | Sset_safe_terminal_coding_system_internal, 1, 1, 0, |
ddb67bdc | 8307 | doc: /* Internal use only. */) |
48b0f3ae | 8308 | (coding_system) |
b74e4686 | 8309 | Lisp_Object coding_system; |
d46c5b12 | 8310 | { |
b7826503 | 8311 | CHECK_SYMBOL (coding_system); |
c4825358 KH |
8312 | setup_coding_system (Fcheck_coding_system (coding_system), |
8313 | &safe_terminal_coding); | |
df7492f9 KH |
8314 | /* Characer composition should be disabled. */ |
8315 | safe_terminal_coding.common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
b73bfc1c KH |
8316 | safe_terminal_coding.src_multibyte = 1; |
8317 | safe_terminal_coding.dst_multibyte = 0; | |
c4825358 KH |
8318 | return Qnil; |
8319 | } | |
4ed46869 | 8320 | |
002fdb44 | 8321 | DEFUN ("terminal-coding-system", Fterminal_coding_system, |
68bba4e4 | 8322 | Sterminal_coding_system, 0, 1, 0, |
6ed8eeff KL |
8323 | doc: /* Return coding system specified for terminal output on the given terminal. |
8324 | TERMINAL may be a terminal id, a frame, or nil for the selected | |
8325 | frame's terminal device. */) | |
8326 | (terminal) | |
8327 | Lisp_Object terminal; | |
4ed46869 | 8328 | { |
985773c9 MB |
8329 | struct coding_system *terminal_coding |
8330 | = TERMINAL_TERMINAL_CODING (get_terminal (terminal, 1)); | |
8331 | Lisp_Object coding_system = CODING_ID_NAME (terminal_coding->id); | |
ae6f73fa | 8332 | |
ae6f73fa | 8333 | /* For backward compatibility, return nil if it is `undecided'. */ |
f75c90a9 | 8334 | return (! EQ (coding_system, Qundecided) ? coding_system : Qnil); |
4ed46869 KH |
8335 | } |
8336 | ||
002fdb44 | 8337 | DEFUN ("set-keyboard-coding-system-internal", Fset_keyboard_coding_system_internal, |
68bba4e4 | 8338 | Sset_keyboard_coding_system_internal, 1, 2, 0, |
48b0f3ae | 8339 | doc: /* Internal use only. */) |
6ed8eeff | 8340 | (coding_system, terminal) |
4ed46869 | 8341 | Lisp_Object coding_system; |
6ed8eeff | 8342 | Lisp_Object terminal; |
4ed46869 | 8343 | { |
6ed8eeff | 8344 | struct terminal *t = get_terminal (terminal, 1); |
b7826503 | 8345 | CHECK_SYMBOL (coding_system); |
df7492f9 | 8346 | setup_coding_system (Fcheck_coding_system (coding_system), |
c73bd236 | 8347 | TERMINAL_KEYBOARD_CODING (t)); |
df7492f9 | 8348 | /* Characer composition should be disabled. */ |
c73bd236 MB |
8349 | TERMINAL_KEYBOARD_CODING (t)->common_flags |
8350 | &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
4ed46869 KH |
8351 | return Qnil; |
8352 | } | |
8353 | ||
8354 | DEFUN ("keyboard-coding-system", | |
985773c9 | 8355 | Fkeyboard_coding_system, Skeyboard_coding_system, 0, 1, 0, |
48b0f3ae | 8356 | doc: /* Return coding system specified for decoding keyboard input. */) |
985773c9 MB |
8357 | (terminal) |
8358 | Lisp_Object terminal; | |
4ed46869 | 8359 | { |
985773c9 MB |
8360 | return CODING_ID_NAME (TERMINAL_KEYBOARD_CODING |
8361 | (get_terminal (terminal, 1))->id); | |
4ed46869 KH |
8362 | } |
8363 | ||
4ed46869 | 8364 | \f |
a5d301df KH |
8365 | DEFUN ("find-operation-coding-system", Ffind_operation_coding_system, |
8366 | Sfind_operation_coding_system, 1, MANY, 0, | |
48b0f3ae PJ |
8367 | doc: /* Choose a coding system for an operation based on the target name. |
8368 | The value names a pair of coding systems: (DECODING-SYSTEM . ENCODING-SYSTEM). | |
8369 | DECODING-SYSTEM is the coding system to use for decoding | |
8370 | \(in case OPERATION does decoding), and ENCODING-SYSTEM is the coding system | |
8371 | for encoding (in case OPERATION does encoding). | |
05e6f5dc | 8372 | |
48b0f3ae PJ |
8373 | The first argument OPERATION specifies an I/O primitive: |
8374 | For file I/O, `insert-file-contents' or `write-region'. | |
8375 | For process I/O, `call-process', `call-process-region', or `start-process'. | |
8376 | For network I/O, `open-network-stream'. | |
05e6f5dc | 8377 | |
48b0f3ae PJ |
8378 | The remaining arguments should be the same arguments that were passed |
8379 | to the primitive. Depending on which primitive, one of those arguments | |
8380 | is selected as the TARGET. For example, if OPERATION does file I/O, | |
8381 | whichever argument specifies the file name is TARGET. | |
05e6f5dc | 8382 | |
48b0f3ae | 8383 | TARGET has a meaning which depends on OPERATION: |
b883cdb2 | 8384 | For file I/O, TARGET is a file name (except for the special case below). |
48b0f3ae PJ |
8385 | For process I/O, TARGET is a process name. |
8386 | For network I/O, TARGET is a service name or a port number | |
05e6f5dc | 8387 | |
48b0f3ae PJ |
8388 | This function looks up what specified for TARGET in, |
8389 | `file-coding-system-alist', `process-coding-system-alist', | |
8390 | or `network-coding-system-alist' depending on OPERATION. | |
8391 | They may specify a coding system, a cons of coding systems, | |
8392 | or a function symbol to call. | |
8393 | In the last case, we call the function with one argument, | |
8394 | which is a list of all the arguments given to this function. | |
1011c487 MB |
8395 | If the function can't decide a coding system, it can return |
8396 | `undecided' so that the normal code-detection is performed. | |
48b0f3ae | 8397 | |
b883cdb2 MB |
8398 | If OPERATION is `insert-file-contents', the argument corresponding to |
8399 | TARGET may be a cons (FILENAME . BUFFER). In that case, FILENAME is a | |
8400 | file name to look up, and BUFFER is a buffer that contains the file's | |
8401 | contents (not yet decoded). If `file-coding-system-alist' specifies a | |
8402 | function to call for FILENAME, that function should examine the | |
8403 | contents of BUFFER instead of reading the file. | |
8404 | ||
d918f936 | 8405 | usage: (find-operation-coding-system OPERATION ARGUMENTS...) */) |
48b0f3ae | 8406 | (nargs, args) |
4ed46869 KH |
8407 | int nargs; |
8408 | Lisp_Object *args; | |
6b89e3aa | 8409 | { |
4ed46869 KH |
8410 | Lisp_Object operation, target_idx, target, val; |
8411 | register Lisp_Object chain; | |
177c0ea7 | 8412 | |
4ed46869 KH |
8413 | if (nargs < 2) |
8414 | error ("Too few arguments"); | |
8415 | operation = args[0]; | |
8416 | if (!SYMBOLP (operation) | |
8417 | || !INTEGERP (target_idx = Fget (operation, Qtarget_idx))) | |
df7492f9 | 8418 | error ("Invalid first arguement"); |
4ed46869 KH |
8419 | if (nargs < 1 + XINT (target_idx)) |
8420 | error ("Too few arguments for operation: %s", | |
8f924df7 | 8421 | SDATA (SYMBOL_NAME (operation))); |
4ed46869 KH |
8422 | target = args[XINT (target_idx) + 1]; |
8423 | if (!(STRINGP (target) | |
091a0ff0 KH |
8424 | || (EQ (operation, Qinsert_file_contents) && CONSP (target) |
8425 | && STRINGP (XCAR (target)) && BUFFERP (XCDR (target))) | |
4ed46869 | 8426 | || (EQ (operation, Qopen_network_stream) && INTEGERP (target)))) |
df7492f9 | 8427 | error ("Invalid %dth argument", XINT (target_idx) + 1); |
091a0ff0 KH |
8428 | if (CONSP (target)) |
8429 | target = XCAR (target); | |
4ed46869 | 8430 | |
2e34157c RS |
8431 | chain = ((EQ (operation, Qinsert_file_contents) |
8432 | || EQ (operation, Qwrite_region)) | |
02ba4723 | 8433 | ? Vfile_coding_system_alist |
2e34157c | 8434 | : (EQ (operation, Qopen_network_stream) |
02ba4723 KH |
8435 | ? Vnetwork_coding_system_alist |
8436 | : Vprocess_coding_system_alist)); | |
4ed46869 KH |
8437 | if (NILP (chain)) |
8438 | return Qnil; | |
8439 | ||
03699b14 | 8440 | for (; CONSP (chain); chain = XCDR (chain)) |
6b89e3aa | 8441 | { |
f44d27ce | 8442 | Lisp_Object elt; |
6b89e3aa | 8443 | |
df7492f9 | 8444 | elt = XCAR (chain); |
4ed46869 KH |
8445 | if (CONSP (elt) |
8446 | && ((STRINGP (target) | |
03699b14 KR |
8447 | && STRINGP (XCAR (elt)) |
8448 | && fast_string_match (XCAR (elt), target) >= 0) | |
8449 | || (INTEGERP (target) && EQ (target, XCAR (elt))))) | |
6b89e3aa | 8450 | { |
03699b14 | 8451 | val = XCDR (elt); |
b19fd4c5 KH |
8452 | /* Here, if VAL is both a valid coding system and a valid |
8453 | function symbol, we return VAL as a coding system. */ | |
02ba4723 KH |
8454 | if (CONSP (val)) |
8455 | return val; | |
8456 | if (! SYMBOLP (val)) | |
8457 | return Qnil; | |
8458 | if (! NILP (Fcoding_system_p (val))) | |
8459 | return Fcons (val, val); | |
b19fd4c5 | 8460 | if (! NILP (Ffboundp (val))) |
6b89e3aa | 8461 | { |
e2b97060 MB |
8462 | /* We use call1 rather than safe_call1 |
8463 | so as to get bug reports about functions called here | |
8464 | which don't handle the current interface. */ | |
8465 | val = call1 (val, Flist (nargs, args)); | |
b19fd4c5 KH |
8466 | if (CONSP (val)) |
8467 | return val; | |
8468 | if (SYMBOLP (val) && ! NILP (Fcoding_system_p (val))) | |
8469 | return Fcons (val, val); | |
6b89e3aa | 8470 | } |
02ba4723 | 8471 | return Qnil; |
6b89e3aa KH |
8472 | } |
8473 | } | |
4ed46869 | 8474 | return Qnil; |
6b89e3aa KH |
8475 | } |
8476 | ||
df7492f9 | 8477 | DEFUN ("set-coding-system-priority", Fset_coding_system_priority, |
a3f6ee6d | 8478 | Sset_coding_system_priority, 0, MANY, 0, |
da7db224 | 8479 | doc: /* Assign higher priority to the coding systems given as arguments. |
ff563fce | 8480 | If multiple coding systems belongs to the same category, |
a3181084 DL |
8481 | all but the first one are ignored. |
8482 | ||
8483 | usage: (set-coding-system-priority ...) */) | |
df7492f9 KH |
8484 | (nargs, args) |
8485 | int nargs; | |
8486 | Lisp_Object *args; | |
8487 | { | |
8488 | int i, j; | |
8489 | int changed[coding_category_max]; | |
8490 | enum coding_category priorities[coding_category_max]; | |
8491 | ||
8492 | bzero (changed, sizeof changed); | |
6b89e3aa | 8493 | |
df7492f9 | 8494 | for (i = j = 0; i < nargs; i++) |
6b89e3aa | 8495 | { |
df7492f9 KH |
8496 | enum coding_category category; |
8497 | Lisp_Object spec, attrs; | |
6b89e3aa | 8498 | |
df7492f9 KH |
8499 | CHECK_CODING_SYSTEM_GET_SPEC (args[i], spec); |
8500 | attrs = AREF (spec, 0); | |
8501 | category = XINT (CODING_ATTR_CATEGORY (attrs)); | |
8502 | if (changed[category]) | |
8503 | /* Ignore this coding system because a coding system of the | |
8504 | same category already had a higher priority. */ | |
8505 | continue; | |
8506 | changed[category] = 1; | |
8507 | priorities[j++] = category; | |
8508 | if (coding_categories[category].id >= 0 | |
8509 | && ! EQ (args[i], CODING_ID_NAME (coding_categories[category].id))) | |
8510 | setup_coding_system (args[i], &coding_categories[category]); | |
ff563fce | 8511 | Fset (AREF (Vcoding_category_table, category), args[i]); |
df7492f9 | 8512 | } |
6b89e3aa | 8513 | |
df7492f9 KH |
8514 | /* Now we have decided top J priorities. Reflect the order of the |
8515 | original priorities to the remaining priorities. */ | |
6b89e3aa | 8516 | |
df7492f9 | 8517 | for (i = j, j = 0; i < coding_category_max; i++, j++) |
6b89e3aa | 8518 | { |
df7492f9 KH |
8519 | while (j < coding_category_max |
8520 | && changed[coding_priorities[j]]) | |
8521 | j++; | |
8522 | if (j == coding_category_max) | |
8523 | abort (); | |
8524 | priorities[i] = coding_priorities[j]; | |
8525 | } | |
6b89e3aa | 8526 | |
df7492f9 | 8527 | bcopy (priorities, coding_priorities, sizeof priorities); |
177c0ea7 | 8528 | |
ff563fce KH |
8529 | /* Update `coding-category-list'. */ |
8530 | Vcoding_category_list = Qnil; | |
8531 | for (i = coding_category_max - 1; i >= 0; i--) | |
8532 | Vcoding_category_list | |
8533 | = Fcons (AREF (Vcoding_category_table, priorities[i]), | |
8534 | Vcoding_category_list); | |
6b89e3aa | 8535 | |
df7492f9 | 8536 | return Qnil; |
6b89e3aa KH |
8537 | } |
8538 | ||
df7492f9 KH |
8539 | DEFUN ("coding-system-priority-list", Fcoding_system_priority_list, |
8540 | Scoding_system_priority_list, 0, 1, 0, | |
da7db224 DL |
8541 | doc: /* Return a list of coding systems ordered by their priorities. |
8542 | HIGHESTP non-nil means just return the highest priority one. */) | |
df7492f9 KH |
8543 | (highestp) |
8544 | Lisp_Object highestp; | |
d46c5b12 KH |
8545 | { |
8546 | int i; | |
df7492f9 | 8547 | Lisp_Object val; |
6b89e3aa | 8548 | |
df7492f9 | 8549 | for (i = 0, val = Qnil; i < coding_category_max; i++) |
d46c5b12 | 8550 | { |
df7492f9 KH |
8551 | enum coding_category category = coding_priorities[i]; |
8552 | int id = coding_categories[category].id; | |
8553 | Lisp_Object attrs; | |
068a9dbd | 8554 | |
df7492f9 KH |
8555 | if (id < 0) |
8556 | continue; | |
8557 | attrs = CODING_ID_ATTRS (id); | |
8558 | if (! NILP (highestp)) | |
8559 | return CODING_ATTR_BASE_NAME (attrs); | |
8560 | val = Fcons (CODING_ATTR_BASE_NAME (attrs), val); | |
8561 | } | |
8562 | return Fnreverse (val); | |
8563 | } | |
068a9dbd | 8564 | |
f0064e1f | 8565 | static char *suffixes[] = { "-unix", "-dos", "-mac" }; |
068a9dbd KH |
8566 | |
8567 | static Lisp_Object | |
df7492f9 KH |
8568 | make_subsidiaries (base) |
8569 | Lisp_Object base; | |
068a9dbd | 8570 | { |
df7492f9 | 8571 | Lisp_Object subsidiaries; |
8f924df7 | 8572 | int base_name_len = SBYTES (SYMBOL_NAME (base)); |
df7492f9 KH |
8573 | char *buf = (char *) alloca (base_name_len + 6); |
8574 | int i; | |
068a9dbd | 8575 | |
8f924df7 | 8576 | bcopy (SDATA (SYMBOL_NAME (base)), buf, base_name_len); |
df7492f9 KH |
8577 | subsidiaries = Fmake_vector (make_number (3), Qnil); |
8578 | for (i = 0; i < 3; i++) | |
068a9dbd | 8579 | { |
df7492f9 KH |
8580 | bcopy (suffixes[i], buf + base_name_len, strlen (suffixes[i]) + 1); |
8581 | ASET (subsidiaries, i, intern (buf)); | |
068a9dbd | 8582 | } |
df7492f9 | 8583 | return subsidiaries; |
068a9dbd KH |
8584 | } |
8585 | ||
8586 | ||
df7492f9 KH |
8587 | DEFUN ("define-coding-system-internal", Fdefine_coding_system_internal, |
8588 | Sdefine_coding_system_internal, coding_arg_max, MANY, 0, | |
1fcd6c8b DL |
8589 | doc: /* For internal use only. |
8590 | usage: (define-coding-system-internal ...) */) | |
df7492f9 KH |
8591 | (nargs, args) |
8592 | int nargs; | |
8593 | Lisp_Object *args; | |
068a9dbd | 8594 | { |
df7492f9 KH |
8595 | Lisp_Object name; |
8596 | Lisp_Object spec_vec; /* [ ATTRS ALIASE EOL_TYPE ] */ | |
8597 | Lisp_Object attrs; /* Vector of attributes. */ | |
8598 | Lisp_Object eol_type; | |
8599 | Lisp_Object aliases; | |
8600 | Lisp_Object coding_type, charset_list, safe_charsets; | |
8601 | enum coding_category category; | |
8602 | Lisp_Object tail, val; | |
8603 | int max_charset_id = 0; | |
8604 | int i; | |
068a9dbd | 8605 | |
df7492f9 KH |
8606 | if (nargs < coding_arg_max) |
8607 | goto short_args; | |
068a9dbd | 8608 | |
df7492f9 | 8609 | attrs = Fmake_vector (make_number (coding_attr_last_index), Qnil); |
068a9dbd | 8610 | |
df7492f9 KH |
8611 | name = args[coding_arg_name]; |
8612 | CHECK_SYMBOL (name); | |
8613 | CODING_ATTR_BASE_NAME (attrs) = name; | |
068a9dbd | 8614 | |
df7492f9 KH |
8615 | val = args[coding_arg_mnemonic]; |
8616 | if (! STRINGP (val)) | |
8617 | CHECK_CHARACTER (val); | |
8618 | CODING_ATTR_MNEMONIC (attrs) = val; | |
068a9dbd | 8619 | |
df7492f9 KH |
8620 | coding_type = args[coding_arg_coding_type]; |
8621 | CHECK_SYMBOL (coding_type); | |
8622 | CODING_ATTR_TYPE (attrs) = coding_type; | |
068a9dbd | 8623 | |
df7492f9 KH |
8624 | charset_list = args[coding_arg_charset_list]; |
8625 | if (SYMBOLP (charset_list)) | |
8626 | { | |
8627 | if (EQ (charset_list, Qiso_2022)) | |
8628 | { | |
8629 | if (! EQ (coding_type, Qiso_2022)) | |
8630 | error ("Invalid charset-list"); | |
8631 | charset_list = Viso_2022_charset_list; | |
8632 | } | |
8633 | else if (EQ (charset_list, Qemacs_mule)) | |
8634 | { | |
8635 | if (! EQ (coding_type, Qemacs_mule)) | |
8636 | error ("Invalid charset-list"); | |
8637 | charset_list = Vemacs_mule_charset_list; | |
8638 | } | |
8639 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
8640 | if (max_charset_id < XFASTINT (XCAR (tail))) | |
8641 | max_charset_id = XFASTINT (XCAR (tail)); | |
8642 | } | |
068a9dbd KH |
8643 | else |
8644 | { | |
df7492f9 | 8645 | charset_list = Fcopy_sequence (charset_list); |
985773c9 | 8646 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) |
068a9dbd | 8647 | { |
df7492f9 KH |
8648 | struct charset *charset; |
8649 | ||
985773c9 | 8650 | val = XCAR (tail); |
df7492f9 KH |
8651 | CHECK_CHARSET_GET_CHARSET (val, charset); |
8652 | if (EQ (coding_type, Qiso_2022) | |
8653 | ? CHARSET_ISO_FINAL (charset) < 0 | |
8654 | : EQ (coding_type, Qemacs_mule) | |
8655 | ? CHARSET_EMACS_MULE_ID (charset) < 0 | |
8656 | : 0) | |
8657 | error ("Can't handle charset `%s'", | |
8f924df7 | 8658 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
df7492f9 | 8659 | |
8f924df7 | 8660 | XSETCAR (tail, make_number (charset->id)); |
df7492f9 KH |
8661 | if (max_charset_id < charset->id) |
8662 | max_charset_id = charset->id; | |
068a9dbd KH |
8663 | } |
8664 | } | |
df7492f9 | 8665 | CODING_ATTR_CHARSET_LIST (attrs) = charset_list; |
068a9dbd | 8666 | |
df7492f9 KH |
8667 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), |
8668 | make_number (255)); | |
8669 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
8f924df7 | 8670 | SSET (safe_charsets, XFASTINT (XCAR (tail)), 0); |
df7492f9 | 8671 | CODING_ATTR_SAFE_CHARSETS (attrs) = safe_charsets; |
068a9dbd | 8672 | |
584948ac | 8673 | CODING_ATTR_ASCII_COMPAT (attrs) = args[coding_arg_ascii_compatible_p]; |
3a73fa5d | 8674 | |
df7492f9 | 8675 | val = args[coding_arg_decode_translation_table]; |
a6f87d34 | 8676 | if (! CHAR_TABLE_P (val) && ! CONSP (val)) |
7d64c6ad | 8677 | CHECK_SYMBOL (val); |
df7492f9 | 8678 | CODING_ATTR_DECODE_TBL (attrs) = val; |
3a73fa5d | 8679 | |
df7492f9 | 8680 | val = args[coding_arg_encode_translation_table]; |
a6f87d34 | 8681 | if (! CHAR_TABLE_P (val) && ! CONSP (val)) |
7d64c6ad | 8682 | CHECK_SYMBOL (val); |
df7492f9 | 8683 | CODING_ATTR_ENCODE_TBL (attrs) = val; |
d46c5b12 | 8684 | |
df7492f9 KH |
8685 | val = args[coding_arg_post_read_conversion]; |
8686 | CHECK_SYMBOL (val); | |
8687 | CODING_ATTR_POST_READ (attrs) = val; | |
d46c5b12 | 8688 | |
df7492f9 KH |
8689 | val = args[coding_arg_pre_write_conversion]; |
8690 | CHECK_SYMBOL (val); | |
8691 | CODING_ATTR_PRE_WRITE (attrs) = val; | |
3a73fa5d | 8692 | |
df7492f9 KH |
8693 | val = args[coding_arg_default_char]; |
8694 | if (NILP (val)) | |
8695 | CODING_ATTR_DEFAULT_CHAR (attrs) = make_number (' '); | |
8696 | else | |
8697 | { | |
8f924df7 | 8698 | CHECK_CHARACTER (val); |
df7492f9 KH |
8699 | CODING_ATTR_DEFAULT_CHAR (attrs) = val; |
8700 | } | |
4031e2bf | 8701 | |
8f924df7 KH |
8702 | val = args[coding_arg_for_unibyte]; |
8703 | CODING_ATTR_FOR_UNIBYTE (attrs) = NILP (val) ? Qnil : Qt; | |
3a73fa5d | 8704 | |
df7492f9 KH |
8705 | val = args[coding_arg_plist]; |
8706 | CHECK_LIST (val); | |
8707 | CODING_ATTR_PLIST (attrs) = val; | |
3a73fa5d | 8708 | |
df7492f9 KH |
8709 | if (EQ (coding_type, Qcharset)) |
8710 | { | |
c7c66a95 KH |
8711 | /* Generate a lisp vector of 256 elements. Each element is nil, |
8712 | integer, or a list of charset IDs. | |
3a73fa5d | 8713 | |
c7c66a95 KH |
8714 | If Nth element is nil, the byte code N is invalid in this |
8715 | coding system. | |
4ed46869 | 8716 | |
c7c66a95 KH |
8717 | If Nth element is a number NUM, N is the first byte of a |
8718 | charset whose ID is NUM. | |
4ed46869 | 8719 | |
c7c66a95 KH |
8720 | If Nth element is a list of charset IDs, N is the first byte |
8721 | of one of them. The list is sorted by dimensions of the | |
2bc515e4 | 8722 | charsets. A charset of smaller dimension comes firtst. */ |
df7492f9 | 8723 | val = Fmake_vector (make_number (256), Qnil); |
4ed46869 | 8724 | |
5c99c2e6 | 8725 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) |
df7492f9 | 8726 | { |
c7c66a95 KH |
8727 | struct charset *charset = CHARSET_FROM_ID (XFASTINT (XCAR (tail))); |
8728 | int dim = CHARSET_DIMENSION (charset); | |
8729 | int idx = (dim - 1) * 4; | |
4ed46869 | 8730 | |
5c99c2e6 | 8731 | if (CHARSET_ASCII_COMPATIBLE_P (charset)) |
584948ac | 8732 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; |
4031e2bf | 8733 | |
15d143f7 KH |
8734 | for (i = charset->code_space[idx]; |
8735 | i <= charset->code_space[idx + 1]; i++) | |
8736 | { | |
c7c66a95 KH |
8737 | Lisp_Object tmp, tmp2; |
8738 | int dim2; | |
ec6d2bb8 | 8739 | |
c7c66a95 KH |
8740 | tmp = AREF (val, i); |
8741 | if (NILP (tmp)) | |
8742 | tmp = XCAR (tail); | |
8743 | else if (NUMBERP (tmp)) | |
8744 | { | |
8745 | dim2 = CHARSET_DIMENSION (CHARSET_FROM_ID (XFASTINT (tmp))); | |
8746 | if (dim < dim2) | |
c7c66a95 | 8747 | tmp = Fcons (XCAR (tail), Fcons (tmp, Qnil)); |
f9d71dcd KH |
8748 | else |
8749 | tmp = Fcons (tmp, Fcons (XCAR (tail), Qnil)); | |
c7c66a95 | 8750 | } |
15d143f7 | 8751 | else |
c7c66a95 KH |
8752 | { |
8753 | for (tmp2 = tmp; CONSP (tmp2); tmp2 = XCDR (tmp2)) | |
8754 | { | |
8755 | dim2 = CHARSET_DIMENSION (CHARSET_FROM_ID (XFASTINT (XCAR (tmp2)))); | |
8756 | if (dim < dim2) | |
8757 | break; | |
8758 | } | |
8759 | if (NILP (tmp2)) | |
8760 | tmp = nconc2 (tmp, Fcons (XCAR (tail), Qnil)); | |
8761 | else | |
8762 | { | |
8763 | XSETCDR (tmp2, Fcons (XCAR (tmp2), XCDR (tmp2))); | |
8764 | XSETCAR (tmp2, XCAR (tail)); | |
8765 | } | |
8766 | } | |
8767 | ASET (val, i, tmp); | |
15d143f7 | 8768 | } |
df7492f9 KH |
8769 | } |
8770 | ASET (attrs, coding_attr_charset_valids, val); | |
8771 | category = coding_category_charset; | |
8772 | } | |
8773 | else if (EQ (coding_type, Qccl)) | |
8774 | { | |
8775 | Lisp_Object valids; | |
ecec61c1 | 8776 | |
df7492f9 KH |
8777 | if (nargs < coding_arg_ccl_max) |
8778 | goto short_args; | |
ecec61c1 | 8779 | |
df7492f9 KH |
8780 | val = args[coding_arg_ccl_decoder]; |
8781 | CHECK_CCL_PROGRAM (val); | |
8782 | if (VECTORP (val)) | |
8783 | val = Fcopy_sequence (val); | |
8784 | ASET (attrs, coding_attr_ccl_decoder, val); | |
ecec61c1 | 8785 | |
df7492f9 KH |
8786 | val = args[coding_arg_ccl_encoder]; |
8787 | CHECK_CCL_PROGRAM (val); | |
8788 | if (VECTORP (val)) | |
8789 | val = Fcopy_sequence (val); | |
8790 | ASET (attrs, coding_attr_ccl_encoder, val); | |
ecec61c1 | 8791 | |
df7492f9 KH |
8792 | val = args[coding_arg_ccl_valids]; |
8793 | valids = Fmake_string (make_number (256), make_number (0)); | |
8794 | for (tail = val; !NILP (tail); tail = Fcdr (tail)) | |
8795 | { | |
8dcbea82 | 8796 | int from, to; |
ecec61c1 | 8797 | |
df7492f9 KH |
8798 | val = Fcar (tail); |
8799 | if (INTEGERP (val)) | |
8dcbea82 KH |
8800 | { |
8801 | from = to = XINT (val); | |
8802 | if (from < 0 || from > 255) | |
8803 | args_out_of_range_3 (val, make_number (0), make_number (255)); | |
8804 | } | |
df7492f9 KH |
8805 | else |
8806 | { | |
df7492f9 | 8807 | CHECK_CONS (val); |
8f924df7 KH |
8808 | CHECK_NATNUM_CAR (val); |
8809 | CHECK_NATNUM_CDR (val); | |
df7492f9 | 8810 | from = XINT (XCAR (val)); |
8f924df7 | 8811 | if (from > 255) |
8dcbea82 KH |
8812 | args_out_of_range_3 (XCAR (val), |
8813 | make_number (0), make_number (255)); | |
df7492f9 | 8814 | to = XINT (XCDR (val)); |
8dcbea82 KH |
8815 | if (to < from || to > 255) |
8816 | args_out_of_range_3 (XCDR (val), | |
8817 | XCAR (val), make_number (255)); | |
df7492f9 | 8818 | } |
8dcbea82 | 8819 | for (i = from; i <= to; i++) |
8f924df7 | 8820 | SSET (valids, i, 1); |
df7492f9 KH |
8821 | } |
8822 | ASET (attrs, coding_attr_ccl_valids, valids); | |
4ed46869 | 8823 | |
df7492f9 | 8824 | category = coding_category_ccl; |
55ab7be3 | 8825 | } |
df7492f9 | 8826 | else if (EQ (coding_type, Qutf_16)) |
55ab7be3 | 8827 | { |
df7492f9 | 8828 | Lisp_Object bom, endian; |
4ed46869 | 8829 | |
584948ac | 8830 | CODING_ATTR_ASCII_COMPAT (attrs) = Qnil; |
4ed46869 | 8831 | |
df7492f9 KH |
8832 | if (nargs < coding_arg_utf16_max) |
8833 | goto short_args; | |
4ed46869 | 8834 | |
df7492f9 KH |
8835 | bom = args[coding_arg_utf16_bom]; |
8836 | if (! NILP (bom) && ! EQ (bom, Qt)) | |
8837 | { | |
8838 | CHECK_CONS (bom); | |
8f924df7 KH |
8839 | val = XCAR (bom); |
8840 | CHECK_CODING_SYSTEM (val); | |
8841 | val = XCDR (bom); | |
8842 | CHECK_CODING_SYSTEM (val); | |
df7492f9 KH |
8843 | } |
8844 | ASET (attrs, coding_attr_utf_16_bom, bom); | |
8845 | ||
8846 | endian = args[coding_arg_utf16_endian]; | |
b49a1807 KH |
8847 | CHECK_SYMBOL (endian); |
8848 | if (NILP (endian)) | |
8849 | endian = Qbig; | |
8850 | else if (! EQ (endian, Qbig) && ! EQ (endian, Qlittle)) | |
8f924df7 | 8851 | error ("Invalid endian: %s", SDATA (SYMBOL_NAME (endian))); |
df7492f9 KH |
8852 | ASET (attrs, coding_attr_utf_16_endian, endian); |
8853 | ||
8854 | category = (CONSP (bom) | |
8855 | ? coding_category_utf_16_auto | |
8856 | : NILP (bom) | |
b49a1807 | 8857 | ? (EQ (endian, Qbig) |
df7492f9 KH |
8858 | ? coding_category_utf_16_be_nosig |
8859 | : coding_category_utf_16_le_nosig) | |
b49a1807 | 8860 | : (EQ (endian, Qbig) |
df7492f9 KH |
8861 | ? coding_category_utf_16_be |
8862 | : coding_category_utf_16_le)); | |
8863 | } | |
8864 | else if (EQ (coding_type, Qiso_2022)) | |
8865 | { | |
8866 | Lisp_Object initial, reg_usage, request, flags; | |
4776e638 | 8867 | int i; |
1397dc18 | 8868 | |
df7492f9 KH |
8869 | if (nargs < coding_arg_iso2022_max) |
8870 | goto short_args; | |
8871 | ||
8872 | initial = Fcopy_sequence (args[coding_arg_iso2022_initial]); | |
8873 | CHECK_VECTOR (initial); | |
8874 | for (i = 0; i < 4; i++) | |
8875 | { | |
8876 | val = Faref (initial, make_number (i)); | |
8877 | if (! NILP (val)) | |
8878 | { | |
584948ac KH |
8879 | struct charset *charset; |
8880 | ||
8881 | CHECK_CHARSET_GET_CHARSET (val, charset); | |
8882 | ASET (initial, i, make_number (CHARSET_ID (charset))); | |
8883 | if (i == 0 && CHARSET_ASCII_COMPATIBLE_P (charset)) | |
8884 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
df7492f9 KH |
8885 | } |
8886 | else | |
8887 | ASET (initial, i, make_number (-1)); | |
8888 | } | |
8889 | ||
8890 | reg_usage = args[coding_arg_iso2022_reg_usage]; | |
8891 | CHECK_CONS (reg_usage); | |
8f924df7 KH |
8892 | CHECK_NUMBER_CAR (reg_usage); |
8893 | CHECK_NUMBER_CDR (reg_usage); | |
df7492f9 KH |
8894 | |
8895 | request = Fcopy_sequence (args[coding_arg_iso2022_request]); | |
8896 | for (tail = request; ! NILP (tail); tail = Fcdr (tail)) | |
1397dc18 | 8897 | { |
df7492f9 | 8898 | int id; |
8f924df7 | 8899 | Lisp_Object tmp; |
df7492f9 KH |
8900 | |
8901 | val = Fcar (tail); | |
8902 | CHECK_CONS (val); | |
8f924df7 KH |
8903 | tmp = XCAR (val); |
8904 | CHECK_CHARSET_GET_ID (tmp, id); | |
8905 | CHECK_NATNUM_CDR (val); | |
df7492f9 KH |
8906 | if (XINT (XCDR (val)) >= 4) |
8907 | error ("Invalid graphic register number: %d", XINT (XCDR (val))); | |
8f924df7 | 8908 | XSETCAR (val, make_number (id)); |
1397dc18 | 8909 | } |
4ed46869 | 8910 | |
df7492f9 KH |
8911 | flags = args[coding_arg_iso2022_flags]; |
8912 | CHECK_NATNUM (flags); | |
8913 | i = XINT (flags); | |
8914 | if (EQ (args[coding_arg_charset_list], Qiso_2022)) | |
8915 | flags = make_number (i | CODING_ISO_FLAG_FULL_SUPPORT); | |
8916 | ||
8917 | ASET (attrs, coding_attr_iso_initial, initial); | |
8918 | ASET (attrs, coding_attr_iso_usage, reg_usage); | |
8919 | ASET (attrs, coding_attr_iso_request, request); | |
8920 | ASET (attrs, coding_attr_iso_flags, flags); | |
8921 | setup_iso_safe_charsets (attrs); | |
8922 | ||
8923 | if (i & CODING_ISO_FLAG_SEVEN_BITS) | |
8924 | category = ((i & (CODING_ISO_FLAG_LOCKING_SHIFT | |
8925 | | CODING_ISO_FLAG_SINGLE_SHIFT)) | |
8926 | ? coding_category_iso_7_else | |
8927 | : EQ (args[coding_arg_charset_list], Qiso_2022) | |
8928 | ? coding_category_iso_7 | |
8929 | : coding_category_iso_7_tight); | |
8930 | else | |
8931 | { | |
8932 | int id = XINT (AREF (initial, 1)); | |
8933 | ||
c6fb6e98 | 8934 | category = (((i & CODING_ISO_FLAG_LOCKING_SHIFT) |
df7492f9 KH |
8935 | || EQ (args[coding_arg_charset_list], Qiso_2022) |
8936 | || id < 0) | |
8937 | ? coding_category_iso_8_else | |
8938 | : (CHARSET_DIMENSION (CHARSET_FROM_ID (id)) == 1) | |
8939 | ? coding_category_iso_8_1 | |
8940 | : coding_category_iso_8_2); | |
8941 | } | |
0ce7886f KH |
8942 | if (category != coding_category_iso_8_1 |
8943 | && category != coding_category_iso_8_2) | |
8944 | CODING_ATTR_ASCII_COMPAT (attrs) = Qnil; | |
df7492f9 KH |
8945 | } |
8946 | else if (EQ (coding_type, Qemacs_mule)) | |
c28a9453 | 8947 | { |
df7492f9 KH |
8948 | if (EQ (args[coding_arg_charset_list], Qemacs_mule)) |
8949 | ASET (attrs, coding_attr_emacs_mule_full, Qt); | |
584948ac | 8950 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; |
df7492f9 | 8951 | category = coding_category_emacs_mule; |
c28a9453 | 8952 | } |
df7492f9 | 8953 | else if (EQ (coding_type, Qshift_jis)) |
c28a9453 | 8954 | { |
df7492f9 KH |
8955 | |
8956 | struct charset *charset; | |
8957 | ||
7d64c6ad | 8958 | if (XINT (Flength (charset_list)) != 3 |
6e07c25f | 8959 | && XINT (Flength (charset_list)) != 4) |
7d64c6ad | 8960 | error ("There should be three or four charsets"); |
df7492f9 KH |
8961 | |
8962 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
8963 | if (CHARSET_DIMENSION (charset) != 1) | |
8964 | error ("Dimension of charset %s is not one", | |
8f924df7 | 8965 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
584948ac KH |
8966 | if (CHARSET_ASCII_COMPATIBLE_P (charset)) |
8967 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
df7492f9 KH |
8968 | |
8969 | charset_list = XCDR (charset_list); | |
8970 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
8971 | if (CHARSET_DIMENSION (charset) != 1) | |
8972 | error ("Dimension of charset %s is not one", | |
8f924df7 | 8973 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
df7492f9 KH |
8974 | |
8975 | charset_list = XCDR (charset_list); | |
8976 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
8977 | if (CHARSET_DIMENSION (charset) != 2) | |
7d64c6ad KH |
8978 | error ("Dimension of charset %s is not two", |
8979 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); | |
8980 | ||
8981 | charset_list = XCDR (charset_list); | |
2b917a06 KH |
8982 | if (! NILP (charset_list)) |
8983 | { | |
8984 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
8985 | if (CHARSET_DIMENSION (charset) != 2) | |
8986 | error ("Dimension of charset %s is not two", | |
8987 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); | |
8988 | } | |
df7492f9 KH |
8989 | |
8990 | category = coding_category_sjis; | |
8991 | Vsjis_coding_system = name; | |
c28a9453 | 8992 | } |
df7492f9 KH |
8993 | else if (EQ (coding_type, Qbig5)) |
8994 | { | |
8995 | struct charset *charset; | |
4ed46869 | 8996 | |
df7492f9 KH |
8997 | if (XINT (Flength (charset_list)) != 2) |
8998 | error ("There should be just two charsets"); | |
8999 | ||
9000 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
9001 | if (CHARSET_DIMENSION (charset) != 1) | |
9002 | error ("Dimension of charset %s is not one", | |
8f924df7 | 9003 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
584948ac KH |
9004 | if (CHARSET_ASCII_COMPATIBLE_P (charset)) |
9005 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
df7492f9 KH |
9006 | |
9007 | charset_list = XCDR (charset_list); | |
9008 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
9009 | if (CHARSET_DIMENSION (charset) != 2) | |
9010 | error ("Dimension of charset %s is not two", | |
8f924df7 | 9011 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
4ed46869 | 9012 | |
df7492f9 KH |
9013 | category = coding_category_big5; |
9014 | Vbig5_coding_system = name; | |
9015 | } | |
9016 | else if (EQ (coding_type, Qraw_text)) | |
c28a9453 | 9017 | { |
584948ac KH |
9018 | category = coding_category_raw_text; |
9019 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
c28a9453 | 9020 | } |
df7492f9 | 9021 | else if (EQ (coding_type, Qutf_8)) |
4ed46869 | 9022 | { |
584948ac KH |
9023 | category = coding_category_utf_8; |
9024 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
4ed46869 | 9025 | } |
df7492f9 KH |
9026 | else if (EQ (coding_type, Qundecided)) |
9027 | category = coding_category_undecided; | |
4ed46869 | 9028 | else |
df7492f9 | 9029 | error ("Invalid coding system type: %s", |
8f924df7 | 9030 | SDATA (SYMBOL_NAME (coding_type))); |
4ed46869 | 9031 | |
df7492f9 | 9032 | CODING_ATTR_CATEGORY (attrs) = make_number (category); |
01378f49 KH |
9033 | CODING_ATTR_PLIST (attrs) |
9034 | = Fcons (QCcategory, Fcons (AREF (Vcoding_category_table, category), | |
9035 | CODING_ATTR_PLIST (attrs))); | |
35befdaa KH |
9036 | CODING_ATTR_PLIST (attrs) |
9037 | = Fcons (QCascii_compatible_p, | |
9038 | Fcons (CODING_ATTR_ASCII_COMPAT (attrs), | |
9039 | CODING_ATTR_PLIST (attrs))); | |
c4825358 | 9040 | |
df7492f9 KH |
9041 | eol_type = args[coding_arg_eol_type]; |
9042 | if (! NILP (eol_type) | |
9043 | && ! EQ (eol_type, Qunix) | |
9044 | && ! EQ (eol_type, Qdos) | |
9045 | && ! EQ (eol_type, Qmac)) | |
9046 | error ("Invalid eol-type"); | |
4ed46869 | 9047 | |
df7492f9 | 9048 | aliases = Fcons (name, Qnil); |
4ed46869 | 9049 | |
df7492f9 KH |
9050 | if (NILP (eol_type)) |
9051 | { | |
9052 | eol_type = make_subsidiaries (name); | |
9053 | for (i = 0; i < 3; i++) | |
1397dc18 | 9054 | { |
df7492f9 KH |
9055 | Lisp_Object this_spec, this_name, this_aliases, this_eol_type; |
9056 | ||
9057 | this_name = AREF (eol_type, i); | |
9058 | this_aliases = Fcons (this_name, Qnil); | |
9059 | this_eol_type = (i == 0 ? Qunix : i == 1 ? Qdos : Qmac); | |
9060 | this_spec = Fmake_vector (make_number (3), attrs); | |
9061 | ASET (this_spec, 1, this_aliases); | |
9062 | ASET (this_spec, 2, this_eol_type); | |
9063 | Fputhash (this_name, this_spec, Vcoding_system_hash_table); | |
9064 | Vcoding_system_list = Fcons (this_name, Vcoding_system_list); | |
583f71ca KH |
9065 | val = Fassoc (Fsymbol_name (this_name), Vcoding_system_alist); |
9066 | if (NILP (val)) | |
9067 | Vcoding_system_alist | |
9068 | = Fcons (Fcons (Fsymbol_name (this_name), Qnil), | |
9069 | Vcoding_system_alist); | |
1397dc18 | 9070 | } |
d46c5b12 | 9071 | } |
4ed46869 | 9072 | |
df7492f9 KH |
9073 | spec_vec = Fmake_vector (make_number (3), attrs); |
9074 | ASET (spec_vec, 1, aliases); | |
9075 | ASET (spec_vec, 2, eol_type); | |
48b0f3ae | 9076 | |
df7492f9 KH |
9077 | Fputhash (name, spec_vec, Vcoding_system_hash_table); |
9078 | Vcoding_system_list = Fcons (name, Vcoding_system_list); | |
583f71ca KH |
9079 | val = Fassoc (Fsymbol_name (name), Vcoding_system_alist); |
9080 | if (NILP (val)) | |
9081 | Vcoding_system_alist = Fcons (Fcons (Fsymbol_name (name), Qnil), | |
9082 | Vcoding_system_alist); | |
48b0f3ae | 9083 | |
df7492f9 KH |
9084 | { |
9085 | int id = coding_categories[category].id; | |
48b0f3ae | 9086 | |
df7492f9 KH |
9087 | if (id < 0 || EQ (name, CODING_ID_NAME (id))) |
9088 | setup_coding_system (name, &coding_categories[category]); | |
9089 | } | |
48b0f3ae | 9090 | |
d46c5b12 | 9091 | return Qnil; |
48b0f3ae | 9092 | |
df7492f9 KH |
9093 | short_args: |
9094 | return Fsignal (Qwrong_number_of_arguments, | |
9095 | Fcons (intern ("define-coding-system-internal"), | |
9096 | make_number (nargs))); | |
d46c5b12 | 9097 | } |
4ed46869 | 9098 | |
d6925f38 | 9099 | |
a6f87d34 KH |
9100 | DEFUN ("coding-system-put", Fcoding_system_put, Scoding_system_put, |
9101 | 3, 3, 0, | |
9102 | doc: /* Change value in CODING-SYSTEM's property list PROP to VAL. */) | |
9103 | (coding_system, prop, val) | |
9104 | Lisp_Object coding_system, prop, val; | |
9105 | { | |
3dbe7859 | 9106 | Lisp_Object spec, attrs; |
a6f87d34 KH |
9107 | |
9108 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
9109 | attrs = AREF (spec, 0); | |
9110 | if (EQ (prop, QCmnemonic)) | |
9111 | { | |
9112 | if (! STRINGP (val)) | |
9113 | CHECK_CHARACTER (val); | |
9114 | CODING_ATTR_MNEMONIC (attrs) = val; | |
9115 | } | |
9116 | else if (EQ (prop, QCdefalut_char)) | |
9117 | { | |
9118 | if (NILP (val)) | |
9119 | val = make_number (' '); | |
9120 | else | |
9121 | CHECK_CHARACTER (val); | |
9122 | CODING_ATTR_DEFAULT_CHAR (attrs) = val; | |
9123 | } | |
9124 | else if (EQ (prop, QCdecode_translation_table)) | |
9125 | { | |
9126 | if (! CHAR_TABLE_P (val) && ! CONSP (val)) | |
9127 | CHECK_SYMBOL (val); | |
9128 | CODING_ATTR_DECODE_TBL (attrs) = val; | |
9129 | } | |
9130 | else if (EQ (prop, QCencode_translation_table)) | |
9131 | { | |
9132 | if (! CHAR_TABLE_P (val) && ! CONSP (val)) | |
9133 | CHECK_SYMBOL (val); | |
9134 | CODING_ATTR_ENCODE_TBL (attrs) = val; | |
9135 | } | |
9136 | else if (EQ (prop, QCpost_read_conversion)) | |
9137 | { | |
9138 | CHECK_SYMBOL (val); | |
9139 | CODING_ATTR_POST_READ (attrs) = val; | |
9140 | } | |
9141 | else if (EQ (prop, QCpre_write_conversion)) | |
9142 | { | |
9143 | CHECK_SYMBOL (val); | |
9144 | CODING_ATTR_PRE_WRITE (attrs) = val; | |
9145 | } | |
35befdaa KH |
9146 | else if (EQ (prop, QCascii_compatible_p)) |
9147 | { | |
9148 | CODING_ATTR_ASCII_COMPAT (attrs) = val; | |
9149 | } | |
a6f87d34 KH |
9150 | |
9151 | CODING_ATTR_PLIST (attrs) | |
9152 | = Fplist_put (CODING_ATTR_PLIST (attrs), prop, val); | |
9153 | return val; | |
9154 | } | |
9155 | ||
9156 | ||
df7492f9 KH |
9157 | DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, |
9158 | Sdefine_coding_system_alias, 2, 2, 0, | |
9159 | doc: /* Define ALIAS as an alias for CODING-SYSTEM. */) | |
9160 | (alias, coding_system) | |
9161 | Lisp_Object alias, coding_system; | |
66cfb530 | 9162 | { |
583f71ca | 9163 | Lisp_Object spec, aliases, eol_type, val; |
4ed46869 | 9164 | |
df7492f9 KH |
9165 | CHECK_SYMBOL (alias); |
9166 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
9167 | aliases = AREF (spec, 1); | |
d6925f38 KH |
9168 | /* ALISES should be a list of length more than zero, and the first |
9169 | element is a base coding system. Append ALIAS at the tail of the | |
9170 | list. */ | |
df7492f9 KH |
9171 | while (!NILP (XCDR (aliases))) |
9172 | aliases = XCDR (aliases); | |
8f924df7 | 9173 | XSETCDR (aliases, Fcons (alias, Qnil)); |
4ed46869 | 9174 | |
df7492f9 KH |
9175 | eol_type = AREF (spec, 2); |
9176 | if (VECTORP (eol_type)) | |
4ed46869 | 9177 | { |
df7492f9 KH |
9178 | Lisp_Object subsidiaries; |
9179 | int i; | |
4ed46869 | 9180 | |
df7492f9 KH |
9181 | subsidiaries = make_subsidiaries (alias); |
9182 | for (i = 0; i < 3; i++) | |
9183 | Fdefine_coding_system_alias (AREF (subsidiaries, i), | |
9184 | AREF (eol_type, i)); | |
4ed46869 | 9185 | } |
df7492f9 KH |
9186 | |
9187 | Fputhash (alias, spec, Vcoding_system_hash_table); | |
d6925f38 | 9188 | Vcoding_system_list = Fcons (alias, Vcoding_system_list); |
583f71ca KH |
9189 | val = Fassoc (Fsymbol_name (alias), Vcoding_system_alist); |
9190 | if (NILP (val)) | |
9191 | Vcoding_system_alist = Fcons (Fcons (Fsymbol_name (alias), Qnil), | |
9192 | Vcoding_system_alist); | |
66cfb530 | 9193 | |
4ed46869 KH |
9194 | return Qnil; |
9195 | } | |
9196 | ||
df7492f9 KH |
9197 | DEFUN ("coding-system-base", Fcoding_system_base, Scoding_system_base, |
9198 | 1, 1, 0, | |
9199 | doc: /* Return the base of CODING-SYSTEM. | |
da7db224 | 9200 | Any alias or subsidiary coding system is not a base coding system. */) |
df7492f9 KH |
9201 | (coding_system) |
9202 | Lisp_Object coding_system; | |
d46c5b12 | 9203 | { |
df7492f9 | 9204 | Lisp_Object spec, attrs; |
d46c5b12 | 9205 | |
df7492f9 KH |
9206 | if (NILP (coding_system)) |
9207 | return (Qno_conversion); | |
9208 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
9209 | attrs = AREF (spec, 0); | |
9210 | return CODING_ATTR_BASE_NAME (attrs); | |
9211 | } | |
1397dc18 | 9212 | |
df7492f9 KH |
9213 | DEFUN ("coding-system-plist", Fcoding_system_plist, Scoding_system_plist, |
9214 | 1, 1, 0, | |
9215 | doc: "Return the property list of CODING-SYSTEM.") | |
9216 | (coding_system) | |
9217 | Lisp_Object coding_system; | |
9218 | { | |
9219 | Lisp_Object spec, attrs; | |
1397dc18 | 9220 | |
df7492f9 KH |
9221 | if (NILP (coding_system)) |
9222 | coding_system = Qno_conversion; | |
9223 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
9224 | attrs = AREF (spec, 0); | |
9225 | return CODING_ATTR_PLIST (attrs); | |
d46c5b12 KH |
9226 | } |
9227 | ||
df7492f9 KH |
9228 | |
9229 | DEFUN ("coding-system-aliases", Fcoding_system_aliases, Scoding_system_aliases, | |
9230 | 1, 1, 0, | |
da7db224 | 9231 | doc: /* Return the list of aliases of CODING-SYSTEM. */) |
df7492f9 KH |
9232 | (coding_system) |
9233 | Lisp_Object coding_system; | |
66cfb530 | 9234 | { |
df7492f9 | 9235 | Lisp_Object spec; |
84d60297 | 9236 | |
df7492f9 KH |
9237 | if (NILP (coding_system)) |
9238 | coding_system = Qno_conversion; | |
9239 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
da7db224 | 9240 | return AREF (spec, 1); |
df7492f9 | 9241 | } |
66cfb530 | 9242 | |
df7492f9 KH |
9243 | DEFUN ("coding-system-eol-type", Fcoding_system_eol_type, |
9244 | Scoding_system_eol_type, 1, 1, 0, | |
9245 | doc: /* Return eol-type of CODING-SYSTEM. | |
9246 | An eol-type is integer 0, 1, 2, or a vector of coding systems. | |
66cfb530 | 9247 | |
df7492f9 KH |
9248 | Integer values 0, 1, and 2 indicate a format of end-of-line; LF, CRLF, |
9249 | and CR respectively. | |
66cfb530 | 9250 | |
df7492f9 KH |
9251 | A vector value indicates that a format of end-of-line should be |
9252 | detected automatically. Nth element of the vector is the subsidiary | |
9253 | coding system whose eol-type is N. */) | |
6b89e3aa KH |
9254 | (coding_system) |
9255 | Lisp_Object coding_system; | |
9256 | { | |
df7492f9 KH |
9257 | Lisp_Object spec, eol_type; |
9258 | int n; | |
6b89e3aa | 9259 | |
df7492f9 KH |
9260 | if (NILP (coding_system)) |
9261 | coding_system = Qno_conversion; | |
9262 | if (! CODING_SYSTEM_P (coding_system)) | |
9263 | return Qnil; | |
9264 | spec = CODING_SYSTEM_SPEC (coding_system); | |
9265 | eol_type = AREF (spec, 2); | |
9266 | if (VECTORP (eol_type)) | |
9267 | return Fcopy_sequence (eol_type); | |
9268 | n = EQ (eol_type, Qunix) ? 0 : EQ (eol_type, Qdos) ? 1 : 2; | |
9269 | return make_number (n); | |
6b89e3aa KH |
9270 | } |
9271 | ||
4ed46869 KH |
9272 | #endif /* emacs */ |
9273 | ||
9274 | \f | |
1397dc18 | 9275 | /*** 9. Post-amble ***/ |
4ed46869 | 9276 | |
dfcf069d | 9277 | void |
4ed46869 KH |
9278 | init_coding_once () |
9279 | { | |
9280 | int i; | |
9281 | ||
df7492f9 KH |
9282 | for (i = 0; i < coding_category_max; i++) |
9283 | { | |
9284 | coding_categories[i].id = -1; | |
9285 | coding_priorities[i] = i; | |
9286 | } | |
4ed46869 KH |
9287 | |
9288 | /* ISO2022 specific initialize routine. */ | |
9289 | for (i = 0; i < 0x20; i++) | |
b73bfc1c | 9290 | iso_code_class[i] = ISO_control_0; |
4ed46869 KH |
9291 | for (i = 0x21; i < 0x7F; i++) |
9292 | iso_code_class[i] = ISO_graphic_plane_0; | |
9293 | for (i = 0x80; i < 0xA0; i++) | |
b73bfc1c | 9294 | iso_code_class[i] = ISO_control_1; |
4ed46869 KH |
9295 | for (i = 0xA1; i < 0xFF; i++) |
9296 | iso_code_class[i] = ISO_graphic_plane_1; | |
9297 | iso_code_class[0x20] = iso_code_class[0x7F] = ISO_0x20_or_0x7F; | |
9298 | iso_code_class[0xA0] = iso_code_class[0xFF] = ISO_0xA0_or_0xFF; | |
4ed46869 KH |
9299 | iso_code_class[ISO_CODE_SO] = ISO_shift_out; |
9300 | iso_code_class[ISO_CODE_SI] = ISO_shift_in; | |
9301 | iso_code_class[ISO_CODE_SS2_7] = ISO_single_shift_2_7; | |
9302 | iso_code_class[ISO_CODE_ESC] = ISO_escape; | |
9303 | iso_code_class[ISO_CODE_SS2] = ISO_single_shift_2; | |
9304 | iso_code_class[ISO_CODE_SS3] = ISO_single_shift_3; | |
9305 | iso_code_class[ISO_CODE_CSI] = ISO_control_sequence_introducer; | |
9306 | ||
df7492f9 KH |
9307 | for (i = 0; i < 256; i++) |
9308 | { | |
9309 | emacs_mule_bytes[i] = 1; | |
9310 | } | |
7c78e542 KH |
9311 | emacs_mule_bytes[EMACS_MULE_LEADING_CODE_PRIVATE_11] = 3; |
9312 | emacs_mule_bytes[EMACS_MULE_LEADING_CODE_PRIVATE_12] = 3; | |
9313 | emacs_mule_bytes[EMACS_MULE_LEADING_CODE_PRIVATE_21] = 4; | |
9314 | emacs_mule_bytes[EMACS_MULE_LEADING_CODE_PRIVATE_22] = 4; | |
e0e989f6 KH |
9315 | } |
9316 | ||
9317 | #ifdef emacs | |
9318 | ||
dfcf069d | 9319 | void |
e0e989f6 KH |
9320 | syms_of_coding () |
9321 | { | |
df7492f9 | 9322 | staticpro (&Vcoding_system_hash_table); |
8f924df7 KH |
9323 | { |
9324 | Lisp_Object args[2]; | |
9325 | args[0] = QCtest; | |
9326 | args[1] = Qeq; | |
9327 | Vcoding_system_hash_table = Fmake_hash_table (2, args); | |
9328 | } | |
df7492f9 KH |
9329 | |
9330 | staticpro (&Vsjis_coding_system); | |
9331 | Vsjis_coding_system = Qnil; | |
e0e989f6 | 9332 | |
df7492f9 KH |
9333 | staticpro (&Vbig5_coding_system); |
9334 | Vbig5_coding_system = Qnil; | |
9335 | ||
24a73b0a KH |
9336 | staticpro (&Vcode_conversion_reused_workbuf); |
9337 | Vcode_conversion_reused_workbuf = Qnil; | |
9338 | ||
9339 | staticpro (&Vcode_conversion_workbuf_name); | |
9340 | Vcode_conversion_workbuf_name = build_string (" *code-conversion-work*"); | |
e0e989f6 | 9341 | |
24a73b0a | 9342 | reused_workbuf_in_use = 0; |
df7492f9 KH |
9343 | |
9344 | DEFSYM (Qcharset, "charset"); | |
9345 | DEFSYM (Qtarget_idx, "target-idx"); | |
9346 | DEFSYM (Qcoding_system_history, "coding-system-history"); | |
bb0115a2 RS |
9347 | Fset (Qcoding_system_history, Qnil); |
9348 | ||
9ce27fde | 9349 | /* Target FILENAME is the first argument. */ |
e0e989f6 | 9350 | Fput (Qinsert_file_contents, Qtarget_idx, make_number (0)); |
9ce27fde | 9351 | /* Target FILENAME is the third argument. */ |
e0e989f6 KH |
9352 | Fput (Qwrite_region, Qtarget_idx, make_number (2)); |
9353 | ||
df7492f9 | 9354 | DEFSYM (Qcall_process, "call-process"); |
9ce27fde | 9355 | /* Target PROGRAM is the first argument. */ |
e0e989f6 KH |
9356 | Fput (Qcall_process, Qtarget_idx, make_number (0)); |
9357 | ||
df7492f9 | 9358 | DEFSYM (Qcall_process_region, "call-process-region"); |
9ce27fde | 9359 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
9360 | Fput (Qcall_process_region, Qtarget_idx, make_number (2)); |
9361 | ||
df7492f9 | 9362 | DEFSYM (Qstart_process, "start-process"); |
9ce27fde | 9363 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
9364 | Fput (Qstart_process, Qtarget_idx, make_number (2)); |
9365 | ||
df7492f9 | 9366 | DEFSYM (Qopen_network_stream, "open-network-stream"); |
9ce27fde | 9367 | /* Target SERVICE is the fourth argument. */ |
e0e989f6 KH |
9368 | Fput (Qopen_network_stream, Qtarget_idx, make_number (3)); |
9369 | ||
df7492f9 KH |
9370 | DEFSYM (Qcoding_system, "coding-system"); |
9371 | DEFSYM (Qcoding_aliases, "coding-aliases"); | |
4ed46869 | 9372 | |
df7492f9 KH |
9373 | DEFSYM (Qeol_type, "eol-type"); |
9374 | DEFSYM (Qunix, "unix"); | |
9375 | DEFSYM (Qdos, "dos"); | |
4ed46869 | 9376 | |
df7492f9 KH |
9377 | DEFSYM (Qbuffer_file_coding_system, "buffer-file-coding-system"); |
9378 | DEFSYM (Qpost_read_conversion, "post-read-conversion"); | |
9379 | DEFSYM (Qpre_write_conversion, "pre-write-conversion"); | |
9380 | DEFSYM (Qdefault_char, "default-char"); | |
9381 | DEFSYM (Qundecided, "undecided"); | |
9382 | DEFSYM (Qno_conversion, "no-conversion"); | |
9383 | DEFSYM (Qraw_text, "raw-text"); | |
4ed46869 | 9384 | |
df7492f9 | 9385 | DEFSYM (Qiso_2022, "iso-2022"); |
4ed46869 | 9386 | |
df7492f9 | 9387 | DEFSYM (Qutf_8, "utf-8"); |
8f924df7 | 9388 | DEFSYM (Qutf_8_emacs, "utf-8-emacs"); |
27901516 | 9389 | |
df7492f9 | 9390 | DEFSYM (Qutf_16, "utf-16"); |
df7492f9 KH |
9391 | DEFSYM (Qbig, "big"); |
9392 | DEFSYM (Qlittle, "little"); | |
27901516 | 9393 | |
df7492f9 KH |
9394 | DEFSYM (Qshift_jis, "shift-jis"); |
9395 | DEFSYM (Qbig5, "big5"); | |
4ed46869 | 9396 | |
df7492f9 | 9397 | DEFSYM (Qcoding_system_p, "coding-system-p"); |
4ed46869 | 9398 | |
df7492f9 | 9399 | DEFSYM (Qcoding_system_error, "coding-system-error"); |
4ed46869 KH |
9400 | Fput (Qcoding_system_error, Qerror_conditions, |
9401 | Fcons (Qcoding_system_error, Fcons (Qerror, Qnil))); | |
9402 | Fput (Qcoding_system_error, Qerror_message, | |
9ce27fde | 9403 | build_string ("Invalid coding system")); |
4ed46869 | 9404 | |
05e6f5dc KH |
9405 | /* Intern this now in case it isn't already done. |
9406 | Setting this variable twice is harmless. | |
9407 | But don't staticpro it here--that is done in alloc.c. */ | |
9408 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
70c22245 | 9409 | |
df7492f9 | 9410 | DEFSYM (Qtranslation_table, "translation-table"); |
433f7f87 | 9411 | Fput (Qtranslation_table, Qchar_table_extra_slots, make_number (2)); |
df7492f9 KH |
9412 | DEFSYM (Qtranslation_table_id, "translation-table-id"); |
9413 | DEFSYM (Qtranslation_table_for_decode, "translation-table-for-decode"); | |
9414 | DEFSYM (Qtranslation_table_for_encode, "translation-table-for-encode"); | |
1397dc18 | 9415 | |
df7492f9 | 9416 | DEFSYM (Qvalid_codes, "valid-codes"); |
9ce27fde | 9417 | |
df7492f9 | 9418 | DEFSYM (Qemacs_mule, "emacs-mule"); |
d46c5b12 | 9419 | |
01378f49 | 9420 | DEFSYM (QCcategory, ":category"); |
a6f87d34 KH |
9421 | DEFSYM (QCmnemonic, ":mnemonic"); |
9422 | DEFSYM (QCdefalut_char, ":default-char"); | |
9423 | DEFSYM (QCdecode_translation_table, ":decode-translation-table"); | |
9424 | DEFSYM (QCencode_translation_table, ":encode-translation-table"); | |
9425 | DEFSYM (QCpost_read_conversion, ":post-read-conversion"); | |
9426 | DEFSYM (QCpre_write_conversion, ":pre-write-conversion"); | |
35befdaa | 9427 | DEFSYM (QCascii_compatible_p, ":ascii-compatible-p"); |
01378f49 | 9428 | |
df7492f9 KH |
9429 | Vcoding_category_table |
9430 | = Fmake_vector (make_number (coding_category_max), Qnil); | |
9431 | staticpro (&Vcoding_category_table); | |
9432 | /* Followings are target of code detection. */ | |
9433 | ASET (Vcoding_category_table, coding_category_iso_7, | |
9434 | intern ("coding-category-iso-7")); | |
9435 | ASET (Vcoding_category_table, coding_category_iso_7_tight, | |
9436 | intern ("coding-category-iso-7-tight")); | |
9437 | ASET (Vcoding_category_table, coding_category_iso_8_1, | |
9438 | intern ("coding-category-iso-8-1")); | |
9439 | ASET (Vcoding_category_table, coding_category_iso_8_2, | |
9440 | intern ("coding-category-iso-8-2")); | |
9441 | ASET (Vcoding_category_table, coding_category_iso_7_else, | |
9442 | intern ("coding-category-iso-7-else")); | |
9443 | ASET (Vcoding_category_table, coding_category_iso_8_else, | |
9444 | intern ("coding-category-iso-8-else")); | |
9445 | ASET (Vcoding_category_table, coding_category_utf_8, | |
9446 | intern ("coding-category-utf-8")); | |
9447 | ASET (Vcoding_category_table, coding_category_utf_16_be, | |
9448 | intern ("coding-category-utf-16-be")); | |
ff563fce KH |
9449 | ASET (Vcoding_category_table, coding_category_utf_16_auto, |
9450 | intern ("coding-category-utf-16-auto")); | |
df7492f9 KH |
9451 | ASET (Vcoding_category_table, coding_category_utf_16_le, |
9452 | intern ("coding-category-utf-16-le")); | |
9453 | ASET (Vcoding_category_table, coding_category_utf_16_be_nosig, | |
9454 | intern ("coding-category-utf-16-be-nosig")); | |
9455 | ASET (Vcoding_category_table, coding_category_utf_16_le_nosig, | |
9456 | intern ("coding-category-utf-16-le-nosig")); | |
9457 | ASET (Vcoding_category_table, coding_category_charset, | |
9458 | intern ("coding-category-charset")); | |
9459 | ASET (Vcoding_category_table, coding_category_sjis, | |
9460 | intern ("coding-category-sjis")); | |
9461 | ASET (Vcoding_category_table, coding_category_big5, | |
9462 | intern ("coding-category-big5")); | |
9463 | ASET (Vcoding_category_table, coding_category_ccl, | |
9464 | intern ("coding-category-ccl")); | |
9465 | ASET (Vcoding_category_table, coding_category_emacs_mule, | |
9466 | intern ("coding-category-emacs-mule")); | |
9467 | /* Followings are NOT target of code detection. */ | |
9468 | ASET (Vcoding_category_table, coding_category_raw_text, | |
9469 | intern ("coding-category-raw-text")); | |
9470 | ASET (Vcoding_category_table, coding_category_undecided, | |
9471 | intern ("coding-category-undecided")); | |
ecf488bc | 9472 | |
065e3595 KH |
9473 | DEFSYM (Qinsufficient_source, "insufficient-source"); |
9474 | DEFSYM (Qinconsistent_eol, "inconsistent-eol"); | |
9475 | DEFSYM (Qinvalid_source, "invalid-source"); | |
9476 | DEFSYM (Qinterrupted, "interrupted"); | |
9477 | DEFSYM (Qinsufficient_memory, "insufficient-memory"); | |
44e8490d | 9478 | DEFSYM (Qcoding_system_define_form, "coding-system-define-form"); |
065e3595 | 9479 | |
4ed46869 KH |
9480 | defsubr (&Scoding_system_p); |
9481 | defsubr (&Sread_coding_system); | |
9482 | defsubr (&Sread_non_nil_coding_system); | |
9483 | defsubr (&Scheck_coding_system); | |
9484 | defsubr (&Sdetect_coding_region); | |
d46c5b12 | 9485 | defsubr (&Sdetect_coding_string); |
05e6f5dc | 9486 | defsubr (&Sfind_coding_systems_region_internal); |
068a9dbd | 9487 | defsubr (&Sunencodable_char_position); |
df7492f9 | 9488 | defsubr (&Scheck_coding_systems_region); |
4ed46869 KH |
9489 | defsubr (&Sdecode_coding_region); |
9490 | defsubr (&Sencode_coding_region); | |
9491 | defsubr (&Sdecode_coding_string); | |
9492 | defsubr (&Sencode_coding_string); | |
9493 | defsubr (&Sdecode_sjis_char); | |
9494 | defsubr (&Sencode_sjis_char); | |
9495 | defsubr (&Sdecode_big5_char); | |
9496 | defsubr (&Sencode_big5_char); | |
1ba9e4ab | 9497 | defsubr (&Sset_terminal_coding_system_internal); |
c4825358 | 9498 | defsubr (&Sset_safe_terminal_coding_system_internal); |
4ed46869 | 9499 | defsubr (&Sterminal_coding_system); |
1ba9e4ab | 9500 | defsubr (&Sset_keyboard_coding_system_internal); |
4ed46869 | 9501 | defsubr (&Skeyboard_coding_system); |
a5d301df | 9502 | defsubr (&Sfind_operation_coding_system); |
df7492f9 | 9503 | defsubr (&Sset_coding_system_priority); |
6b89e3aa | 9504 | defsubr (&Sdefine_coding_system_internal); |
df7492f9 | 9505 | defsubr (&Sdefine_coding_system_alias); |
a6f87d34 | 9506 | defsubr (&Scoding_system_put); |
df7492f9 KH |
9507 | defsubr (&Scoding_system_base); |
9508 | defsubr (&Scoding_system_plist); | |
9509 | defsubr (&Scoding_system_aliases); | |
9510 | defsubr (&Scoding_system_eol_type); | |
9511 | defsubr (&Scoding_system_priority_list); | |
4ed46869 | 9512 | |
4608c386 | 9513 | DEFVAR_LISP ("coding-system-list", &Vcoding_system_list, |
48b0f3ae PJ |
9514 | doc: /* List of coding systems. |
9515 | ||
9516 | Do not alter the value of this variable manually. This variable should be | |
df7492f9 | 9517 | updated by the functions `define-coding-system' and |
48b0f3ae | 9518 | `define-coding-system-alias'. */); |
4608c386 KH |
9519 | Vcoding_system_list = Qnil; |
9520 | ||
9521 | DEFVAR_LISP ("coding-system-alist", &Vcoding_system_alist, | |
48b0f3ae PJ |
9522 | doc: /* Alist of coding system names. |
9523 | Each element is one element list of coding system name. | |
9524 | This variable is given to `completing-read' as TABLE argument. | |
9525 | ||
9526 | Do not alter the value of this variable manually. This variable should be | |
9527 | updated by the functions `make-coding-system' and | |
9528 | `define-coding-system-alias'. */); | |
4608c386 KH |
9529 | Vcoding_system_alist = Qnil; |
9530 | ||
4ed46869 | 9531 | DEFVAR_LISP ("coding-category-list", &Vcoding_category_list, |
48b0f3ae PJ |
9532 | doc: /* List of coding-categories (symbols) ordered by priority. |
9533 | ||
9534 | On detecting a coding system, Emacs tries code detection algorithms | |
9535 | associated with each coding-category one by one in this order. When | |
9536 | one algorithm agrees with a byte sequence of source text, the coding | |
0ec31faf KH |
9537 | system bound to the corresponding coding-category is selected. |
9538 | ||
42205607 | 9539 | Don't modify this variable directly, but use `set-coding-priority'. */); |
4ed46869 KH |
9540 | { |
9541 | int i; | |
9542 | ||
9543 | Vcoding_category_list = Qnil; | |
df7492f9 | 9544 | for (i = coding_category_max - 1; i >= 0; i--) |
4ed46869 | 9545 | Vcoding_category_list |
d46c5b12 KH |
9546 | = Fcons (XVECTOR (Vcoding_category_table)->contents[i], |
9547 | Vcoding_category_list); | |
4ed46869 KH |
9548 | } |
9549 | ||
9550 | DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read, | |
48b0f3ae PJ |
9551 | doc: /* Specify the coding system for read operations. |
9552 | It is useful to bind this variable with `let', but do not set it globally. | |
9553 | If the value is a coding system, it is used for decoding on read operation. | |
9554 | If not, an appropriate element is used from one of the coding system alists: | |
9555 | There are three such tables, `file-coding-system-alist', | |
9556 | `process-coding-system-alist', and `network-coding-system-alist'. */); | |
4ed46869 KH |
9557 | Vcoding_system_for_read = Qnil; |
9558 | ||
9559 | DEFVAR_LISP ("coding-system-for-write", &Vcoding_system_for_write, | |
48b0f3ae PJ |
9560 | doc: /* Specify the coding system for write operations. |
9561 | Programs bind this variable with `let', but you should not set it globally. | |
9562 | If the value is a coding system, it is used for encoding of output, | |
9563 | when writing it to a file and when sending it to a file or subprocess. | |
9564 | ||
9565 | If this does not specify a coding system, an appropriate element | |
9566 | is used from one of the coding system alists: | |
9567 | There are three such tables, `file-coding-system-alist', | |
9568 | `process-coding-system-alist', and `network-coding-system-alist'. | |
9569 | For output to files, if the above procedure does not specify a coding system, | |
9570 | the value of `buffer-file-coding-system' is used. */); | |
4ed46869 KH |
9571 | Vcoding_system_for_write = Qnil; |
9572 | ||
9573 | DEFVAR_LISP ("last-coding-system-used", &Vlast_coding_system_used, | |
df7492f9 KH |
9574 | doc: /* |
9575 | Coding system used in the latest file or process I/O. */); | |
4ed46869 KH |
9576 | Vlast_coding_system_used = Qnil; |
9577 | ||
065e3595 KH |
9578 | DEFVAR_LISP ("last-code-conversion-error", &Vlast_code_conversion_error, |
9579 | doc: /* | |
9580 | Error status of the last code conversion. | |
9581 | ||
9582 | When an error was detected in the last code conversion, this variable | |
9583 | is set to one of the following symbols. | |
9584 | `insufficient-source' | |
9585 | `inconsistent-eol' | |
9586 | `invalid-source' | |
9587 | `interrupted' | |
9588 | `insufficient-memory' | |
9589 | When no error was detected, the value doesn't change. So, to check | |
9590 | the error status of a code conversion by this variable, you must | |
9591 | explicitly set this variable to nil before performing code | |
9592 | conversion. */); | |
9593 | Vlast_code_conversion_error = Qnil; | |
9594 | ||
9ce27fde | 9595 | DEFVAR_BOOL ("inhibit-eol-conversion", &inhibit_eol_conversion, |
df7492f9 KH |
9596 | doc: /* |
9597 | *Non-nil means always inhibit code conversion of end-of-line format. | |
48b0f3ae PJ |
9598 | See info node `Coding Systems' and info node `Text and Binary' concerning |
9599 | such conversion. */); | |
9ce27fde KH |
9600 | inhibit_eol_conversion = 0; |
9601 | ||
ed29121d | 9602 | DEFVAR_BOOL ("inherit-process-coding-system", &inherit_process_coding_system, |
df7492f9 KH |
9603 | doc: /* |
9604 | Non-nil means process buffer inherits coding system of process output. | |
48b0f3ae PJ |
9605 | Bind it to t if the process output is to be treated as if it were a file |
9606 | read from some filesystem. */); | |
ed29121d EZ |
9607 | inherit_process_coding_system = 0; |
9608 | ||
02ba4723 | 9609 | DEFVAR_LISP ("file-coding-system-alist", &Vfile_coding_system_alist, |
df7492f9 KH |
9610 | doc: /* |
9611 | Alist to decide a coding system to use for a file I/O operation. | |
48b0f3ae PJ |
9612 | The format is ((PATTERN . VAL) ...), |
9613 | where PATTERN is a regular expression matching a file name, | |
9614 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
9615 | If VAL is a coding system, it is used for both decoding and encoding | |
9616 | the file contents. | |
9617 | If VAL is a cons of coding systems, the car part is used for decoding, | |
9618 | and the cdr part is used for encoding. | |
9619 | If VAL is a function symbol, the function must return a coding system | |
2c53e699 KH |
9620 | or a cons of coding systems which are used as above. The function is |
9621 | called with an argument that is a list of the arguments with which | |
5a0bbd9a KH |
9622 | `find-operation-coding-system' was called. If the function can't decide |
9623 | a coding system, it can return `undecided' so that the normal | |
9624 | code-detection is performed. | |
48b0f3ae PJ |
9625 | |
9626 | See also the function `find-operation-coding-system' | |
9627 | and the variable `auto-coding-alist'. */); | |
02ba4723 KH |
9628 | Vfile_coding_system_alist = Qnil; |
9629 | ||
9630 | DEFVAR_LISP ("process-coding-system-alist", &Vprocess_coding_system_alist, | |
df7492f9 KH |
9631 | doc: /* |
9632 | Alist to decide a coding system to use for a process I/O operation. | |
48b0f3ae PJ |
9633 | The format is ((PATTERN . VAL) ...), |
9634 | where PATTERN is a regular expression matching a program name, | |
9635 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
9636 | If VAL is a coding system, it is used for both decoding what received | |
9637 | from the program and encoding what sent to the program. | |
9638 | If VAL is a cons of coding systems, the car part is used for decoding, | |
9639 | and the cdr part is used for encoding. | |
9640 | If VAL is a function symbol, the function must return a coding system | |
9641 | or a cons of coding systems which are used as above. | |
9642 | ||
9643 | See also the function `find-operation-coding-system'. */); | |
02ba4723 KH |
9644 | Vprocess_coding_system_alist = Qnil; |
9645 | ||
9646 | DEFVAR_LISP ("network-coding-system-alist", &Vnetwork_coding_system_alist, | |
df7492f9 KH |
9647 | doc: /* |
9648 | Alist to decide a coding system to use for a network I/O operation. | |
48b0f3ae PJ |
9649 | The format is ((PATTERN . VAL) ...), |
9650 | where PATTERN is a regular expression matching a network service name | |
9651 | or is a port number to connect to, | |
9652 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
9653 | If VAL is a coding system, it is used for both decoding what received | |
9654 | from the network stream and encoding what sent to the network stream. | |
9655 | If VAL is a cons of coding systems, the car part is used for decoding, | |
9656 | and the cdr part is used for encoding. | |
9657 | If VAL is a function symbol, the function must return a coding system | |
9658 | or a cons of coding systems which are used as above. | |
9659 | ||
9660 | See also the function `find-operation-coding-system'. */); | |
02ba4723 | 9661 | Vnetwork_coding_system_alist = Qnil; |
4ed46869 | 9662 | |
68c45bf0 | 9663 | DEFVAR_LISP ("locale-coding-system", &Vlocale_coding_system, |
75205970 RS |
9664 | doc: /* Coding system to use with system messages. |
9665 | Also used for decoding keyboard input on X Window system. */); | |
68c45bf0 PE |
9666 | Vlocale_coding_system = Qnil; |
9667 | ||
005f0d35 | 9668 | /* The eol mnemonics are reset in startup.el system-dependently. */ |
7722baf9 | 9669 | DEFVAR_LISP ("eol-mnemonic-unix", &eol_mnemonic_unix, |
df7492f9 KH |
9670 | doc: /* |
9671 | *String displayed in mode line for UNIX-like (LF) end-of-line format. */); | |
7722baf9 | 9672 | eol_mnemonic_unix = build_string (":"); |
4ed46869 | 9673 | |
7722baf9 | 9674 | DEFVAR_LISP ("eol-mnemonic-dos", &eol_mnemonic_dos, |
df7492f9 KH |
9675 | doc: /* |
9676 | *String displayed in mode line for DOS-like (CRLF) end-of-line format. */); | |
7722baf9 | 9677 | eol_mnemonic_dos = build_string ("\\"); |
4ed46869 | 9678 | |
7722baf9 | 9679 | DEFVAR_LISP ("eol-mnemonic-mac", &eol_mnemonic_mac, |
df7492f9 KH |
9680 | doc: /* |
9681 | *String displayed in mode line for MAC-like (CR) end-of-line format. */); | |
7722baf9 | 9682 | eol_mnemonic_mac = build_string ("/"); |
4ed46869 | 9683 | |
7722baf9 | 9684 | DEFVAR_LISP ("eol-mnemonic-undecided", &eol_mnemonic_undecided, |
df7492f9 KH |
9685 | doc: /* |
9686 | *String displayed in mode line when end-of-line format is not yet determined. */); | |
7722baf9 | 9687 | eol_mnemonic_undecided = build_string (":"); |
4ed46869 | 9688 | |
84fbb8a0 | 9689 | DEFVAR_LISP ("enable-character-translation", &Venable_character_translation, |
df7492f9 KH |
9690 | doc: /* |
9691 | *Non-nil enables character translation while encoding and decoding. */); | |
84fbb8a0 | 9692 | Venable_character_translation = Qt; |
bdd9fb48 | 9693 | |
f967223b | 9694 | DEFVAR_LISP ("standard-translation-table-for-decode", |
48b0f3ae PJ |
9695 | &Vstandard_translation_table_for_decode, |
9696 | doc: /* Table for translating characters while decoding. */); | |
f967223b | 9697 | Vstandard_translation_table_for_decode = Qnil; |
bdd9fb48 | 9698 | |
f967223b | 9699 | DEFVAR_LISP ("standard-translation-table-for-encode", |
48b0f3ae PJ |
9700 | &Vstandard_translation_table_for_encode, |
9701 | doc: /* Table for translating characters while encoding. */); | |
f967223b | 9702 | Vstandard_translation_table_for_encode = Qnil; |
4ed46869 | 9703 | |
df7492f9 | 9704 | DEFVAR_LISP ("charset-revision-table", &Vcharset_revision_table, |
48b0f3ae PJ |
9705 | doc: /* Alist of charsets vs revision numbers. |
9706 | While encoding, if a charset (car part of an element) is found, | |
df7492f9 KH |
9707 | designate it with the escape sequence identifying revision (cdr part |
9708 | of the element). */); | |
9709 | Vcharset_revision_table = Qnil; | |
02ba4723 KH |
9710 | |
9711 | DEFVAR_LISP ("default-process-coding-system", | |
9712 | &Vdefault_process_coding_system, | |
48b0f3ae PJ |
9713 | doc: /* Cons of coding systems used for process I/O by default. |
9714 | The car part is used for decoding a process output, | |
9715 | the cdr part is used for encoding a text to be sent to a process. */); | |
02ba4723 | 9716 | Vdefault_process_coding_system = Qnil; |
c4825358 | 9717 | |
3f003981 | 9718 | DEFVAR_LISP ("latin-extra-code-table", &Vlatin_extra_code_table, |
df7492f9 KH |
9719 | doc: /* |
9720 | Table of extra Latin codes in the range 128..159 (inclusive). | |
48b0f3ae PJ |
9721 | This is a vector of length 256. |
9722 | If Nth element is non-nil, the existence of code N in a file | |
9723 | \(or output of subprocess) doesn't prevent it to be detected as | |
9724 | a coding system of ISO 2022 variant which has a flag | |
9725 | `accept-latin-extra-code' t (e.g. iso-latin-1) on reading a file | |
9726 | or reading output of a subprocess. | |
9727 | Only 128th through 159th elements has a meaning. */); | |
3f003981 | 9728 | Vlatin_extra_code_table = Fmake_vector (make_number (256), Qnil); |
d46c5b12 KH |
9729 | |
9730 | DEFVAR_LISP ("select-safe-coding-system-function", | |
9731 | &Vselect_safe_coding_system_function, | |
df7492f9 KH |
9732 | doc: /* |
9733 | Function to call to select safe coding system for encoding a text. | |
48b0f3ae PJ |
9734 | |
9735 | If set, this function is called to force a user to select a proper | |
9736 | coding system which can encode the text in the case that a default | |
9737 | coding system used in each operation can't encode the text. | |
9738 | ||
9739 | The default value is `select-safe-coding-system' (which see). */); | |
d46c5b12 KH |
9740 | Vselect_safe_coding_system_function = Qnil; |
9741 | ||
5d5bf4d8 KH |
9742 | DEFVAR_BOOL ("coding-system-require-warning", |
9743 | &coding_system_require_warning, | |
9744 | doc: /* Internal use only. | |
6b89e3aa KH |
9745 | If non-nil, on writing a file, `select-safe-coding-system-function' is |
9746 | called even if `coding-system-for-write' is non-nil. The command | |
9747 | `universal-coding-system-argument' binds this variable to t temporarily. */); | |
5d5bf4d8 KH |
9748 | coding_system_require_warning = 0; |
9749 | ||
9750 | ||
22ab2303 | 9751 | DEFVAR_BOOL ("inhibit-iso-escape-detection", |
74383408 | 9752 | &inhibit_iso_escape_detection, |
df7492f9 KH |
9753 | doc: /* |
9754 | If non-nil, Emacs ignores ISO2022's escape sequence on code detection. | |
48b0f3ae PJ |
9755 | |
9756 | By default, on reading a file, Emacs tries to detect how the text is | |
9757 | encoded. This code detection is sensitive to escape sequences. If | |
9758 | the sequence is valid as ISO2022, the code is determined as one of | |
9759 | the ISO2022 encodings, and the file is decoded by the corresponding | |
9760 | coding system (e.g. `iso-2022-7bit'). | |
9761 | ||
9762 | However, there may be a case that you want to read escape sequences in | |
9763 | a file as is. In such a case, you can set this variable to non-nil. | |
9764 | Then, as the code detection ignores any escape sequences, no file is | |
9765 | detected as encoded in some ISO2022 encoding. The result is that all | |
9766 | escape sequences become visible in a buffer. | |
9767 | ||
9768 | The default value is nil, and it is strongly recommended not to change | |
9769 | it. That is because many Emacs Lisp source files that contain | |
9770 | non-ASCII characters are encoded by the coding system `iso-2022-7bit' | |
9771 | in Emacs's distribution, and they won't be decoded correctly on | |
9772 | reading if you suppress escape sequence detection. | |
9773 | ||
9774 | The other way to read escape sequences in a file without decoding is | |
9775 | to explicitly specify some coding system that doesn't use ISO2022's | |
9776 | escape sequence (e.g `latin-1') on reading by \\[universal-coding-system-argument]. */); | |
74383408 | 9777 | inhibit_iso_escape_detection = 0; |
002fdb44 DL |
9778 | |
9779 | DEFVAR_LISP ("translation-table-for-input", &Vtranslation_table_for_input, | |
15c8f9d1 DL |
9780 | doc: /* Char table for translating self-inserting characters. |
9781 | This is applied to the result of input methods, not their input. See also | |
9782 | `keyboard-translate-table'. */); | |
002fdb44 | 9783 | Vtranslation_table_for_input = Qnil; |
8f924df7 | 9784 | |
2c78b7e1 KH |
9785 | { |
9786 | Lisp_Object args[coding_arg_max]; | |
8f924df7 | 9787 | Lisp_Object plist[16]; |
2c78b7e1 KH |
9788 | int i; |
9789 | ||
9790 | for (i = 0; i < coding_arg_max; i++) | |
9791 | args[i] = Qnil; | |
9792 | ||
9793 | plist[0] = intern (":name"); | |
9794 | plist[1] = args[coding_arg_name] = Qno_conversion; | |
9795 | plist[2] = intern (":mnemonic"); | |
9796 | plist[3] = args[coding_arg_mnemonic] = make_number ('='); | |
9797 | plist[4] = intern (":coding-type"); | |
9798 | plist[5] = args[coding_arg_coding_type] = Qraw_text; | |
9799 | plist[6] = intern (":ascii-compatible-p"); | |
9800 | plist[7] = args[coding_arg_ascii_compatible_p] = Qt; | |
9801 | plist[8] = intern (":default-char"); | |
9802 | plist[9] = args[coding_arg_default_char] = make_number (0); | |
8f924df7 KH |
9803 | plist[10] = intern (":for-unibyte"); |
9804 | plist[11] = args[coding_arg_for_unibyte] = Qt; | |
9805 | plist[12] = intern (":docstring"); | |
9806 | plist[13] = build_string ("Do no conversion.\n\ | |
2c78b7e1 KH |
9807 | \n\ |
9808 | When you visit a file with this coding, the file is read into a\n\ | |
9809 | unibyte buffer as is, thus each byte of a file is treated as a\n\ | |
9810 | character."); | |
8f924df7 KH |
9811 | plist[14] = intern (":eol-type"); |
9812 | plist[15] = args[coding_arg_eol_type] = Qunix; | |
9813 | args[coding_arg_plist] = Flist (16, plist); | |
2c78b7e1 | 9814 | Fdefine_coding_system_internal (coding_arg_max, args); |
ae6f73fa KH |
9815 | |
9816 | plist[1] = args[coding_arg_name] = Qundecided; | |
9817 | plist[3] = args[coding_arg_mnemonic] = make_number ('-'); | |
9818 | plist[5] = args[coding_arg_coding_type] = Qundecided; | |
9819 | /* This is already set. | |
35befdaa | 9820 | plist[7] = args[coding_arg_ascii_compatible_p] = Qt; */ |
ae6f73fa KH |
9821 | plist[8] = intern (":charset-list"); |
9822 | plist[9] = args[coding_arg_charset_list] = Fcons (Qascii, Qnil); | |
9823 | plist[11] = args[coding_arg_for_unibyte] = Qnil; | |
9824 | plist[13] = build_string ("No conversion on encoding, automatic conversion on decoding."); | |
9825 | plist[15] = args[coding_arg_eol_type] = Qnil; | |
9826 | args[coding_arg_plist] = Flist (16, plist); | |
9827 | Fdefine_coding_system_internal (coding_arg_max, args); | |
2c78b7e1 KH |
9828 | } |
9829 | ||
2c78b7e1 | 9830 | setup_coding_system (Qno_conversion, &safe_terminal_coding); |
ff563fce KH |
9831 | |
9832 | { | |
9833 | int i; | |
9834 | ||
9835 | for (i = 0; i < coding_category_max; i++) | |
9836 | Fset (AREF (Vcoding_category_table, i), Qno_conversion); | |
9837 | } | |
fcbcfb64 KH |
9838 | #if defined (MSDOS) || defined (WINDOWSNT) |
9839 | system_eol_type = Qdos; | |
9840 | #else | |
9841 | system_eol_type = Qunix; | |
9842 | #endif | |
9843 | staticpro (&system_eol_type); | |
4ed46869 KH |
9844 | } |
9845 | ||
68c45bf0 PE |
9846 | char * |
9847 | emacs_strerror (error_number) | |
9848 | int error_number; | |
9849 | { | |
9850 | char *str; | |
9851 | ||
ca9c0567 | 9852 | synchronize_system_messages_locale (); |
68c45bf0 PE |
9853 | str = strerror (error_number); |
9854 | ||
9855 | if (! NILP (Vlocale_coding_system)) | |
9856 | { | |
9857 | Lisp_Object dec = code_convert_string_norecord (build_string (str), | |
9858 | Vlocale_coding_system, | |
9859 | 0); | |
d5db4077 | 9860 | str = (char *) SDATA (dec); |
68c45bf0 PE |
9861 | } |
9862 | ||
9863 | return str; | |
9864 | } | |
9865 | ||
4ed46869 | 9866 | #endif /* emacs */ |
9ffd559c KH |
9867 | |
9868 | /* arch-tag: 3a3a2b01-5ff6-4071-9afe-f5b808d9229d | |
9869 | (do not change this comment) */ |