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9542cb1f | 1 | /* Coding system handler (conversion, detection, etc). |
4a2f9c6a | 2 | Copyright (C) 1995, 1997, 1998 Electrotechnical Laboratory, JAPAN. |
8f924df7 | 3 | Licensed to the Free Software Foundation. |
6f197c07 | 4 | Copyright (C) 2001, 2002 Free Software Foundation, Inc. |
8f924df7 | 5 | Copyright (C) 2003 |
df7492f9 KH |
6 | National Institute of Advanced Industrial Science and Technology (AIST) |
7 | Registration Number H13PRO009 | |
4ed46869 | 8 | |
369314dc KH |
9 | This file is part of GNU Emacs. |
10 | ||
11 | GNU Emacs is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2, or (at your option) | |
14 | any later version. | |
4ed46869 | 15 | |
369314dc KH |
16 | GNU Emacs is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
4ed46869 | 20 | |
369314dc KH |
21 | You should have received a copy of the GNU General Public License |
22 | along with GNU Emacs; see the file COPYING. If not, write to | |
23 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | Boston, MA 02111-1307, USA. */ | |
4ed46869 KH |
25 | |
26 | /*** TABLE OF CONTENTS *** | |
27 | ||
b73bfc1c | 28 | 0. General comments |
4ed46869 | 29 | 1. Preamble |
df7492f9 KH |
30 | 2. Emacs' internal format (emacs-utf-8) handlers |
31 | 3. UTF-8 handlers | |
32 | 4. UTF-16 handlers | |
33 | 5. Charset-base coding systems handlers | |
34 | 6. emacs-mule (old Emacs' internal format) handlers | |
35 | 7. ISO2022 handlers | |
36 | 8. Shift-JIS and BIG5 handlers | |
37 | 9. CCL handlers | |
38 | 10. C library functions | |
39 | 11. Emacs Lisp library functions | |
40 | 12. Postamble | |
4ed46869 KH |
41 | |
42 | */ | |
43 | ||
df7492f9 | 44 | /*** 0. General comments *** |
b73bfc1c KH |
45 | |
46 | ||
df7492f9 | 47 | CODING SYSTEM |
4ed46869 | 48 | |
5bad0796 DL |
49 | A coding system is an object for an encoding mechanism that contains |
50 | information about how to convert byte sequences to character | |
e19c3639 KH |
51 | sequences and vice versa. When we say "decode", it means converting |
52 | a byte sequence of a specific coding system into a character | |
53 | sequence that is represented by Emacs' internal coding system | |
54 | `emacs-utf-8', and when we say "encode", it means converting a | |
55 | character sequence of emacs-utf-8 to a byte sequence of a specific | |
0ef69138 | 56 | coding system. |
4ed46869 | 57 | |
e19c3639 KH |
58 | In Emacs Lisp, a coding system is represented by a Lisp symbol. In |
59 | C level, a coding system is represented by a vector of attributes | |
5bad0796 | 60 | stored in the hash table Vcharset_hash_table. The conversion from |
e19c3639 KH |
61 | coding system symbol to attributes vector is done by looking up |
62 | Vcharset_hash_table by the symbol. | |
4ed46869 | 63 | |
e19c3639 | 64 | Coding systems are classified into the following types depending on |
5bad0796 | 65 | the encoding mechanism. Here's a brief description of the types. |
4ed46869 | 66 | |
df7492f9 KH |
67 | o UTF-8 |
68 | ||
69 | o UTF-16 | |
70 | ||
71 | o Charset-base coding system | |
72 | ||
73 | A coding system defined by one or more (coded) character sets. | |
5bad0796 | 74 | Decoding and encoding are done by a code converter defined for each |
df7492f9 KH |
75 | character set. |
76 | ||
5bad0796 | 77 | o Old Emacs internal format (emacs-mule) |
df7492f9 | 78 | |
5bad0796 | 79 | The coding system adopted by old versions of Emacs (20 and 21). |
4ed46869 | 80 | |
df7492f9 | 81 | o ISO2022-base coding system |
4ed46869 KH |
82 | |
83 | The most famous coding system for multiple character sets. X's | |
df7492f9 KH |
84 | Compound Text, various EUCs (Extended Unix Code), and coding systems |
85 | used in the Internet communication such as ISO-2022-JP are all | |
86 | variants of ISO2022. | |
4ed46869 | 87 | |
df7492f9 | 88 | o SJIS (or Shift-JIS or MS-Kanji-Code) |
93dec019 | 89 | |
4ed46869 KH |
90 | A coding system to encode character sets: ASCII, JISX0201, and |
91 | JISX0208. Widely used for PC's in Japan. Details are described in | |
df7492f9 | 92 | section 8. |
4ed46869 | 93 | |
df7492f9 | 94 | o BIG5 |
4ed46869 | 95 | |
df7492f9 | 96 | A coding system to encode character sets: ASCII and Big5. Widely |
cfb43547 | 97 | used for Chinese (mainly in Taiwan and Hong Kong). Details are |
df7492f9 KH |
98 | described in section 8. In this file, when we write "big5" (all |
99 | lowercase), we mean the coding system, and when we write "Big5" | |
100 | (capitalized), we mean the character set. | |
4ed46869 | 101 | |
df7492f9 | 102 | o CCL |
27901516 | 103 | |
5bad0796 | 104 | If a user wants to decode/encode text encoded in a coding system |
df7492f9 KH |
105 | not listed above, he can supply a decoder and an encoder for it in |
106 | CCL (Code Conversion Language) programs. Emacs executes the CCL | |
107 | program while decoding/encoding. | |
27901516 | 108 | |
df7492f9 | 109 | o Raw-text |
4ed46869 | 110 | |
5a936b46 | 111 | A coding system for text containing raw eight-bit data. Emacs |
5bad0796 | 112 | treats each byte of source text as a character (except for |
df7492f9 | 113 | end-of-line conversion). |
4ed46869 | 114 | |
df7492f9 KH |
115 | o No-conversion |
116 | ||
117 | Like raw text, but don't do end-of-line conversion. | |
4ed46869 | 118 | |
4ed46869 | 119 | |
df7492f9 | 120 | END-OF-LINE FORMAT |
4ed46869 | 121 | |
5bad0796 | 122 | How text end-of-line is encoded depends on operating system. For |
df7492f9 | 123 | instance, Unix's format is just one byte of LF (line-feed) code, |
f4dee582 | 124 | whereas DOS's format is two-byte sequence of `carriage-return' and |
d46c5b12 KH |
125 | `line-feed' codes. MacOS's format is usually one byte of |
126 | `carriage-return'. | |
4ed46869 | 127 | |
cfb43547 | 128 | Since text character encoding and end-of-line encoding are |
df7492f9 KH |
129 | independent, any coding system described above can take any format |
130 | of end-of-line (except for no-conversion). | |
4ed46869 | 131 | |
e19c3639 KH |
132 | STRUCT CODING_SYSTEM |
133 | ||
134 | Before using a coding system for code conversion (i.e. decoding and | |
135 | encoding), we setup a structure of type `struct coding_system'. | |
136 | This structure keeps various information about a specific code | |
5bad0796 | 137 | conversion (e.g. the location of source and destination data). |
4ed46869 KH |
138 | |
139 | */ | |
140 | ||
df7492f9 KH |
141 | /* COMMON MACROS */ |
142 | ||
143 | ||
4ed46869 KH |
144 | /*** GENERAL NOTES on `detect_coding_XXX ()' functions *** |
145 | ||
df7492f9 | 146 | These functions check if a byte sequence specified as a source in |
ff0dacd7 KH |
147 | CODING conforms to the format of XXX, and update the members of |
148 | DETECT_INFO. | |
df7492f9 | 149 | |
ff0dacd7 | 150 | Return 1 if the byte sequence conforms to XXX, otherwise return 0. |
df7492f9 KH |
151 | |
152 | Below is the template of these functions. */ | |
153 | ||
4ed46869 | 154 | #if 0 |
df7492f9 | 155 | static int |
ff0dacd7 | 156 | detect_coding_XXX (coding, detect_info) |
df7492f9 | 157 | struct coding_system *coding; |
ff0dacd7 | 158 | struct coding_detection_info *detect_info; |
4ed46869 | 159 | { |
df7492f9 KH |
160 | unsigned char *src = coding->source; |
161 | unsigned char *src_end = coding->source + coding->src_bytes; | |
162 | int multibytep = coding->src_multibyte; | |
ff0dacd7 | 163 | int consumed_chars = 0; |
df7492f9 KH |
164 | int found = 0; |
165 | ...; | |
166 | ||
167 | while (1) | |
168 | { | |
169 | /* Get one byte from the source. If the souce is exausted, jump | |
170 | to no_more_source:. */ | |
171 | ONE_MORE_BYTE (c); | |
ff0dacd7 KH |
172 | |
173 | if (! __C_conforms_to_XXX___ (c)) | |
174 | break; | |
175 | if (! __C_strongly_suggests_XXX__ (c)) | |
176 | found = CATEGORY_MASK_XXX; | |
df7492f9 | 177 | } |
ff0dacd7 KH |
178 | /* The byte sequence is invalid for XXX. */ |
179 | detect_info->rejected |= CATEGORY_MASK_XXX; | |
df7492f9 | 180 | return 0; |
ff0dacd7 | 181 | |
df7492f9 | 182 | no_more_source: |
ff0dacd7 KH |
183 | /* The source exausted successfully. */ |
184 | detect_info->found |= found; | |
df7492f9 | 185 | return 1; |
4ed46869 KH |
186 | } |
187 | #endif | |
188 | ||
189 | /*** GENERAL NOTES on `decode_coding_XXX ()' functions *** | |
190 | ||
df7492f9 KH |
191 | These functions decode a byte sequence specified as a source by |
192 | CODING. The resulting multibyte text goes to a place pointed to by | |
193 | CODING->charbuf, the length of which should not exceed | |
194 | CODING->charbuf_size; | |
d46c5b12 | 195 | |
df7492f9 KH |
196 | These functions set the information of original and decoded texts in |
197 | CODING->consumed, CODING->consumed_char, and CODING->charbuf_used. | |
198 | They also set CODING->result to one of CODING_RESULT_XXX indicating | |
199 | how the decoding is finished. | |
d46c5b12 | 200 | |
df7492f9 | 201 | Below is the template of these functions. */ |
d46c5b12 | 202 | |
4ed46869 | 203 | #if 0 |
b73bfc1c | 204 | static void |
df7492f9 | 205 | decode_coding_XXXX (coding) |
4ed46869 | 206 | struct coding_system *coding; |
4ed46869 | 207 | { |
df7492f9 KH |
208 | unsigned char *src = coding->source + coding->consumed; |
209 | unsigned char *src_end = coding->source + coding->src_bytes; | |
210 | /* SRC_BASE remembers the start position in source in each loop. | |
211 | The loop will be exited when there's not enough source code, or | |
212 | when there's no room in CHARBUF for a decoded character. */ | |
213 | unsigned char *src_base; | |
214 | /* A buffer to produce decoded characters. */ | |
215 | int *charbuf = coding->charbuf; | |
216 | int *charbuf_end = charbuf + coding->charbuf_size; | |
217 | int multibytep = coding->src_multibyte; | |
218 | ||
219 | while (1) | |
220 | { | |
221 | src_base = src; | |
222 | if (charbuf < charbuf_end) | |
223 | /* No more room to produce a decoded character. */ | |
224 | break; | |
225 | ONE_MORE_BYTE (c); | |
226 | /* Decode it. */ | |
227 | } | |
228 | ||
229 | no_more_source: | |
230 | if (src_base < src_end | |
231 | && coding->mode & CODING_MODE_LAST_BLOCK) | |
232 | /* If the source ends by partial bytes to construct a character, | |
233 | treat them as eight-bit raw data. */ | |
234 | while (src_base < src_end && charbuf < charbuf_end) | |
235 | *charbuf++ = *src_base++; | |
236 | /* Remember how many bytes and characters we consumed. If the | |
237 | source is multibyte, the bytes and chars are not identical. */ | |
238 | coding->consumed = coding->consumed_char = src_base - coding->source; | |
239 | /* Remember how many characters we produced. */ | |
240 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
241 | } |
242 | #endif | |
243 | ||
244 | /*** GENERAL NOTES on `encode_coding_XXX ()' functions *** | |
245 | ||
df7492f9 KH |
246 | These functions encode SRC_BYTES length text at SOURCE of Emacs' |
247 | internal multibyte format by CODING. The resulting byte sequence | |
b73bfc1c KH |
248 | goes to a place pointed to by DESTINATION, the length of which |
249 | should not exceed DST_BYTES. | |
d46c5b12 | 250 | |
df7492f9 KH |
251 | These functions set the information of original and encoded texts in |
252 | the members produced, produced_char, consumed, and consumed_char of | |
253 | the structure *CODING. They also set the member result to one of | |
254 | CODING_RESULT_XXX indicating how the encoding finished. | |
d46c5b12 | 255 | |
df7492f9 KH |
256 | DST_BYTES zero means that source area and destination area are |
257 | overlapped, which means that we can produce a encoded text until it | |
258 | reaches at the head of not-yet-encoded source text. | |
d46c5b12 | 259 | |
df7492f9 | 260 | Below is a template of these functions. */ |
4ed46869 | 261 | #if 0 |
b73bfc1c | 262 | static void |
df7492f9 | 263 | encode_coding_XXX (coding) |
4ed46869 | 264 | struct coding_system *coding; |
4ed46869 | 265 | { |
df7492f9 KH |
266 | int multibytep = coding->dst_multibyte; |
267 | int *charbuf = coding->charbuf; | |
268 | int *charbuf_end = charbuf->charbuf + coding->charbuf_used; | |
269 | unsigned char *dst = coding->destination + coding->produced; | |
270 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
271 | unsigned char *adjusted_dst_end = dst_end - _MAX_BYTES_PRODUCED_IN_LOOP_; | |
272 | int produced_chars = 0; | |
273 | ||
274 | for (; charbuf < charbuf_end && dst < adjusted_dst_end; charbuf++) | |
275 | { | |
276 | int c = *charbuf; | |
277 | /* Encode C into DST, and increment DST. */ | |
278 | } | |
279 | label_no_more_destination: | |
280 | /* How many chars and bytes we produced. */ | |
281 | coding->produced_char += produced_chars; | |
282 | coding->produced = dst - coding->destination; | |
4ed46869 KH |
283 | } |
284 | #endif | |
285 | ||
4ed46869 KH |
286 | \f |
287 | /*** 1. Preamble ***/ | |
288 | ||
68c45bf0 | 289 | #include <config.h> |
4ed46869 KH |
290 | #include <stdio.h> |
291 | ||
4ed46869 KH |
292 | #include "lisp.h" |
293 | #include "buffer.h" | |
df7492f9 | 294 | #include "character.h" |
4ed46869 KH |
295 | #include "charset.h" |
296 | #include "ccl.h" | |
df7492f9 | 297 | #include "composite.h" |
4ed46869 KH |
298 | #include "coding.h" |
299 | #include "window.h" | |
4ed46869 | 300 | |
df7492f9 | 301 | Lisp_Object Vcoding_system_hash_table; |
4ed46869 | 302 | |
df7492f9 | 303 | Lisp_Object Qcoding_system, Qcoding_aliases, Qeol_type; |
1965cb73 DL |
304 | Lisp_Object Qunix, Qdos; |
305 | extern Lisp_Object Qmac; /* frame.c */ | |
4ed46869 KH |
306 | Lisp_Object Qbuffer_file_coding_system; |
307 | Lisp_Object Qpost_read_conversion, Qpre_write_conversion; | |
df7492f9 | 308 | Lisp_Object Qdefault_char; |
27901516 | 309 | Lisp_Object Qno_conversion, Qundecided; |
df7492f9 | 310 | Lisp_Object Qcharset, Qiso_2022, Qutf_8, Qutf_16, Qshift_jis, Qbig5; |
b49a1807 | 311 | Lisp_Object Qbig, Qlittle; |
bb0115a2 | 312 | Lisp_Object Qcoding_system_history; |
1397dc18 | 313 | Lisp_Object Qvalid_codes; |
01378f49 | 314 | Lisp_Object QCcategory; |
4ed46869 KH |
315 | |
316 | extern Lisp_Object Qinsert_file_contents, Qwrite_region; | |
317 | Lisp_Object Qcall_process, Qcall_process_region, Qprocess_argument; | |
318 | Lisp_Object Qstart_process, Qopen_network_stream; | |
319 | Lisp_Object Qtarget_idx; | |
320 | ||
5d5bf4d8 KH |
321 | int coding_system_require_warning; |
322 | ||
d46c5b12 KH |
323 | Lisp_Object Vselect_safe_coding_system_function; |
324 | ||
7722baf9 EZ |
325 | /* Mnemonic string for each format of end-of-line. */ |
326 | Lisp_Object eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac; | |
327 | /* Mnemonic string to indicate format of end-of-line is not yet | |
4ed46869 | 328 | decided. */ |
7722baf9 | 329 | Lisp_Object eol_mnemonic_undecided; |
4ed46869 KH |
330 | |
331 | #ifdef emacs | |
332 | ||
4608c386 KH |
333 | Lisp_Object Vcoding_system_list, Vcoding_system_alist; |
334 | ||
335 | Lisp_Object Qcoding_system_p, Qcoding_system_error; | |
4ed46869 | 336 | |
d46c5b12 KH |
337 | /* Coding system emacs-mule and raw-text are for converting only |
338 | end-of-line format. */ | |
339 | Lisp_Object Qemacs_mule, Qraw_text; | |
8f924df7 | 340 | Lisp_Object Qutf_8_emacs; |
ecf488bc | 341 | |
4ed46869 KH |
342 | /* Coding-systems are handed between Emacs Lisp programs and C internal |
343 | routines by the following three variables. */ | |
344 | /* Coding-system for reading files and receiving data from process. */ | |
345 | Lisp_Object Vcoding_system_for_read; | |
346 | /* Coding-system for writing files and sending data to process. */ | |
347 | Lisp_Object Vcoding_system_for_write; | |
348 | /* Coding-system actually used in the latest I/O. */ | |
349 | Lisp_Object Vlast_coding_system_used; | |
350 | ||
c4825358 | 351 | /* A vector of length 256 which contains information about special |
94487c4e | 352 | Latin codes (especially for dealing with Microsoft codes). */ |
3f003981 | 353 | Lisp_Object Vlatin_extra_code_table; |
c4825358 | 354 | |
9ce27fde KH |
355 | /* Flag to inhibit code conversion of end-of-line format. */ |
356 | int inhibit_eol_conversion; | |
357 | ||
74383408 KH |
358 | /* Flag to inhibit ISO2022 escape sequence detection. */ |
359 | int inhibit_iso_escape_detection; | |
360 | ||
ed29121d EZ |
361 | /* Flag to make buffer-file-coding-system inherit from process-coding. */ |
362 | int inherit_process_coding_system; | |
363 | ||
c4825358 | 364 | /* Coding system to be used to encode text for terminal display. */ |
4ed46869 KH |
365 | struct coding_system terminal_coding; |
366 | ||
c4825358 KH |
367 | /* Coding system to be used to encode text for terminal display when |
368 | terminal coding system is nil. */ | |
369 | struct coding_system safe_terminal_coding; | |
370 | ||
371 | /* Coding system of what is sent from terminal keyboard. */ | |
4ed46869 KH |
372 | struct coding_system keyboard_coding; |
373 | ||
02ba4723 KH |
374 | Lisp_Object Vfile_coding_system_alist; |
375 | Lisp_Object Vprocess_coding_system_alist; | |
376 | Lisp_Object Vnetwork_coding_system_alist; | |
4ed46869 | 377 | |
68c45bf0 PE |
378 | Lisp_Object Vlocale_coding_system; |
379 | ||
4ed46869 KH |
380 | #endif /* emacs */ |
381 | ||
f967223b KH |
382 | /* Flag to tell if we look up translation table on character code |
383 | conversion. */ | |
84fbb8a0 | 384 | Lisp_Object Venable_character_translation; |
f967223b KH |
385 | /* Standard translation table to look up on decoding (reading). */ |
386 | Lisp_Object Vstandard_translation_table_for_decode; | |
387 | /* Standard translation table to look up on encoding (writing). */ | |
388 | Lisp_Object Vstandard_translation_table_for_encode; | |
84fbb8a0 | 389 | |
f967223b KH |
390 | Lisp_Object Qtranslation_table; |
391 | Lisp_Object Qtranslation_table_id; | |
392 | Lisp_Object Qtranslation_table_for_decode; | |
393 | Lisp_Object Qtranslation_table_for_encode; | |
4ed46869 KH |
394 | |
395 | /* Alist of charsets vs revision number. */ | |
df7492f9 | 396 | static Lisp_Object Vcharset_revision_table; |
4ed46869 | 397 | |
02ba4723 KH |
398 | /* Default coding systems used for process I/O. */ |
399 | Lisp_Object Vdefault_process_coding_system; | |
400 | ||
002fdb44 DL |
401 | /* Char table for translating Quail and self-inserting input. */ |
402 | Lisp_Object Vtranslation_table_for_input; | |
403 | ||
b843d1ae KH |
404 | /* Global flag to tell that we can't call post-read-conversion and |
405 | pre-write-conversion functions. Usually the value is zero, but it | |
406 | is set to 1 temporarily while such functions are running. This is | |
407 | to avoid infinite recursive call. */ | |
408 | static int inhibit_pre_post_conversion; | |
409 | ||
df7492f9 KH |
410 | /* Two special coding systems. */ |
411 | Lisp_Object Vsjis_coding_system; | |
412 | Lisp_Object Vbig5_coding_system; | |
413 | ||
414 | ||
ff0dacd7 KH |
415 | static int detect_coding_utf_8 P_ ((struct coding_system *, |
416 | struct coding_detection_info *info)); | |
df7492f9 KH |
417 | static void decode_coding_utf_8 P_ ((struct coding_system *)); |
418 | static int encode_coding_utf_8 P_ ((struct coding_system *)); | |
419 | ||
ff0dacd7 KH |
420 | static int detect_coding_utf_16 P_ ((struct coding_system *, |
421 | struct coding_detection_info *info)); | |
df7492f9 KH |
422 | static void decode_coding_utf_16 P_ ((struct coding_system *)); |
423 | static int encode_coding_utf_16 P_ ((struct coding_system *)); | |
424 | ||
ff0dacd7 KH |
425 | static int detect_coding_iso_2022 P_ ((struct coding_system *, |
426 | struct coding_detection_info *info)); | |
df7492f9 KH |
427 | static void decode_coding_iso_2022 P_ ((struct coding_system *)); |
428 | static int encode_coding_iso_2022 P_ ((struct coding_system *)); | |
429 | ||
ff0dacd7 KH |
430 | static int detect_coding_emacs_mule P_ ((struct coding_system *, |
431 | struct coding_detection_info *info)); | |
df7492f9 KH |
432 | static void decode_coding_emacs_mule P_ ((struct coding_system *)); |
433 | static int encode_coding_emacs_mule P_ ((struct coding_system *)); | |
434 | ||
ff0dacd7 KH |
435 | static int detect_coding_sjis P_ ((struct coding_system *, |
436 | struct coding_detection_info *info)); | |
df7492f9 KH |
437 | static void decode_coding_sjis P_ ((struct coding_system *)); |
438 | static int encode_coding_sjis P_ ((struct coding_system *)); | |
439 | ||
ff0dacd7 KH |
440 | static int detect_coding_big5 P_ ((struct coding_system *, |
441 | struct coding_detection_info *info)); | |
df7492f9 KH |
442 | static void decode_coding_big5 P_ ((struct coding_system *)); |
443 | static int encode_coding_big5 P_ ((struct coding_system *)); | |
444 | ||
ff0dacd7 KH |
445 | static int detect_coding_ccl P_ ((struct coding_system *, |
446 | struct coding_detection_info *info)); | |
df7492f9 KH |
447 | static void decode_coding_ccl P_ ((struct coding_system *)); |
448 | static int encode_coding_ccl P_ ((struct coding_system *)); | |
449 | ||
450 | static void decode_coding_raw_text P_ ((struct coding_system *)); | |
451 | static int encode_coding_raw_text P_ ((struct coding_system *)); | |
452 | ||
453 | ||
454 | /* ISO2022 section */ | |
455 | ||
456 | #define CODING_ISO_INITIAL(coding, reg) \ | |
457 | (XINT (AREF (AREF (CODING_ID_ATTRS ((coding)->id), \ | |
458 | coding_attr_iso_initial), \ | |
459 | reg))) | |
460 | ||
461 | ||
462 | #define CODING_ISO_REQUEST(coding, charset_id) \ | |
463 | ((charset_id <= (coding)->max_charset_id \ | |
464 | ? (coding)->safe_charsets[charset_id] \ | |
465 | : -1)) | |
466 | ||
467 | ||
468 | #define CODING_ISO_FLAGS(coding) \ | |
469 | ((coding)->spec.iso_2022.flags) | |
470 | #define CODING_ISO_DESIGNATION(coding, reg) \ | |
471 | ((coding)->spec.iso_2022.current_designation[reg]) | |
472 | #define CODING_ISO_INVOCATION(coding, plane) \ | |
473 | ((coding)->spec.iso_2022.current_invocation[plane]) | |
474 | #define CODING_ISO_SINGLE_SHIFTING(coding) \ | |
475 | ((coding)->spec.iso_2022.single_shifting) | |
476 | #define CODING_ISO_BOL(coding) \ | |
477 | ((coding)->spec.iso_2022.bol) | |
478 | #define CODING_ISO_INVOKED_CHARSET(coding, plane) \ | |
479 | CODING_ISO_DESIGNATION ((coding), CODING_ISO_INVOCATION ((coding), (plane))) | |
480 | ||
481 | /* Control characters of ISO2022. */ | |
482 | /* code */ /* function */ | |
483 | #define ISO_CODE_LF 0x0A /* line-feed */ | |
484 | #define ISO_CODE_CR 0x0D /* carriage-return */ | |
485 | #define ISO_CODE_SO 0x0E /* shift-out */ | |
486 | #define ISO_CODE_SI 0x0F /* shift-in */ | |
487 | #define ISO_CODE_SS2_7 0x19 /* single-shift-2 for 7-bit code */ | |
488 | #define ISO_CODE_ESC 0x1B /* escape */ | |
489 | #define ISO_CODE_SS2 0x8E /* single-shift-2 */ | |
490 | #define ISO_CODE_SS3 0x8F /* single-shift-3 */ | |
491 | #define ISO_CODE_CSI 0x9B /* control-sequence-introducer */ | |
492 | ||
493 | /* All code (1-byte) of ISO2022 is classified into one of the | |
494 | followings. */ | |
495 | enum iso_code_class_type | |
496 | { | |
497 | ISO_control_0, /* Control codes in the range | |
498 | 0x00..0x1F and 0x7F, except for the | |
499 | following 5 codes. */ | |
500 | ISO_carriage_return, /* ISO_CODE_CR (0x0D) */ | |
501 | ISO_shift_out, /* ISO_CODE_SO (0x0E) */ | |
502 | ISO_shift_in, /* ISO_CODE_SI (0x0F) */ | |
503 | ISO_single_shift_2_7, /* ISO_CODE_SS2_7 (0x19) */ | |
504 | ISO_escape, /* ISO_CODE_SO (0x1B) */ | |
505 | ISO_control_1, /* Control codes in the range | |
506 | 0x80..0x9F, except for the | |
507 | following 3 codes. */ | |
508 | ISO_single_shift_2, /* ISO_CODE_SS2 (0x8E) */ | |
509 | ISO_single_shift_3, /* ISO_CODE_SS3 (0x8F) */ | |
510 | ISO_control_sequence_introducer, /* ISO_CODE_CSI (0x9B) */ | |
511 | ISO_0x20_or_0x7F, /* Codes of the values 0x20 or 0x7F. */ | |
512 | ISO_graphic_plane_0, /* Graphic codes in the range 0x21..0x7E. */ | |
513 | ISO_0xA0_or_0xFF, /* Codes of the values 0xA0 or 0xFF. */ | |
514 | ISO_graphic_plane_1 /* Graphic codes in the range 0xA1..0xFE. */ | |
515 | }; | |
05e6f5dc | 516 | |
df7492f9 KH |
517 | /** The macros CODING_ISO_FLAG_XXX defines a flag bit of the |
518 | `iso-flags' attribute of an iso2022 coding system. */ | |
05e6f5dc | 519 | |
df7492f9 KH |
520 | /* If set, produce long-form designation sequence (e.g. ESC $ ( A) |
521 | instead of the correct short-form sequence (e.g. ESC $ A). */ | |
522 | #define CODING_ISO_FLAG_LONG_FORM 0x0001 | |
93dec019 | 523 | |
df7492f9 KH |
524 | /* If set, reset graphic planes and registers at end-of-line to the |
525 | initial state. */ | |
526 | #define CODING_ISO_FLAG_RESET_AT_EOL 0x0002 | |
05e6f5dc | 527 | |
df7492f9 KH |
528 | /* If set, reset graphic planes and registers before any control |
529 | characters to the initial state. */ | |
530 | #define CODING_ISO_FLAG_RESET_AT_CNTL 0x0004 | |
05e6f5dc | 531 | |
df7492f9 KH |
532 | /* If set, encode by 7-bit environment. */ |
533 | #define CODING_ISO_FLAG_SEVEN_BITS 0x0008 | |
4ed46869 | 534 | |
df7492f9 KH |
535 | /* If set, use locking-shift function. */ |
536 | #define CODING_ISO_FLAG_LOCKING_SHIFT 0x0010 | |
b73bfc1c | 537 | |
df7492f9 KH |
538 | /* If set, use single-shift function. Overwrite |
539 | CODING_ISO_FLAG_LOCKING_SHIFT. */ | |
540 | #define CODING_ISO_FLAG_SINGLE_SHIFT 0x0020 | |
b73bfc1c | 541 | |
df7492f9 KH |
542 | /* If set, use designation escape sequence. */ |
543 | #define CODING_ISO_FLAG_DESIGNATION 0x0040 | |
b73bfc1c | 544 | |
df7492f9 KH |
545 | /* If set, produce revision number sequence. */ |
546 | #define CODING_ISO_FLAG_REVISION 0x0080 | |
b73bfc1c | 547 | |
df7492f9 KH |
548 | /* If set, produce ISO6429's direction specifying sequence. */ |
549 | #define CODING_ISO_FLAG_DIRECTION 0x0100 | |
f4dee582 | 550 | |
df7492f9 KH |
551 | /* If set, assume designation states are reset at beginning of line on |
552 | output. */ | |
553 | #define CODING_ISO_FLAG_INIT_AT_BOL 0x0200 | |
4ed46869 | 554 | |
df7492f9 KH |
555 | /* If set, designation sequence should be placed at beginning of line |
556 | on output. */ | |
557 | #define CODING_ISO_FLAG_DESIGNATE_AT_BOL 0x0400 | |
aa72b389 | 558 | |
df7492f9 KH |
559 | /* If set, do not encode unsafe charactes on output. */ |
560 | #define CODING_ISO_FLAG_SAFE 0x0800 | |
aa72b389 | 561 | |
df7492f9 KH |
562 | /* If set, extra latin codes (128..159) are accepted as a valid code |
563 | on input. */ | |
564 | #define CODING_ISO_FLAG_LATIN_EXTRA 0x1000 | |
aa72b389 | 565 | |
df7492f9 | 566 | #define CODING_ISO_FLAG_COMPOSITION 0x2000 |
aa72b389 | 567 | |
df7492f9 | 568 | #define CODING_ISO_FLAG_EUC_TW_SHIFT 0x4000 |
aa72b389 | 569 | |
bf16eb23 | 570 | #define CODING_ISO_FLAG_USE_ROMAN 0x8000 |
aa72b389 | 571 | |
bf16eb23 | 572 | #define CODING_ISO_FLAG_USE_OLDJIS 0x10000 |
aa72b389 | 573 | |
bf16eb23 | 574 | #define CODING_ISO_FLAG_FULL_SUPPORT 0x100000 |
aa72b389 | 575 | |
df7492f9 KH |
576 | /* A character to be produced on output if encoding of the original |
577 | character is prohibited by CODING_ISO_FLAG_SAFE. */ | |
578 | #define CODING_INHIBIT_CHARACTER_SUBSTITUTION '?' | |
aa72b389 | 579 | |
4ed46869 | 580 | |
df7492f9 KH |
581 | /* UTF-16 section */ |
582 | #define CODING_UTF_16_BOM(coding) \ | |
583 | ((coding)->spec.utf_16.bom) | |
4ed46869 | 584 | |
df7492f9 KH |
585 | #define CODING_UTF_16_ENDIAN(coding) \ |
586 | ((coding)->spec.utf_16.endian) | |
4ed46869 | 587 | |
df7492f9 KH |
588 | #define CODING_UTF_16_SURROGATE(coding) \ |
589 | ((coding)->spec.utf_16.surrogate) | |
4ed46869 | 590 | |
4ed46869 | 591 | |
df7492f9 KH |
592 | /* CCL section */ |
593 | #define CODING_CCL_DECODER(coding) \ | |
594 | AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_decoder) | |
595 | #define CODING_CCL_ENCODER(coding) \ | |
596 | AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_encoder) | |
597 | #define CODING_CCL_VALIDS(coding) \ | |
8f924df7 | 598 | (SDATA (AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_valids))) |
4ed46869 | 599 | |
5a936b46 | 600 | /* Index for each coding category in `coding_categories' */ |
4ed46869 | 601 | |
df7492f9 KH |
602 | enum coding_category |
603 | { | |
604 | coding_category_iso_7, | |
605 | coding_category_iso_7_tight, | |
606 | coding_category_iso_8_1, | |
607 | coding_category_iso_8_2, | |
608 | coding_category_iso_7_else, | |
609 | coding_category_iso_8_else, | |
610 | coding_category_utf_8, | |
611 | coding_category_utf_16_auto, | |
612 | coding_category_utf_16_be, | |
613 | coding_category_utf_16_le, | |
614 | coding_category_utf_16_be_nosig, | |
615 | coding_category_utf_16_le_nosig, | |
616 | coding_category_charset, | |
617 | coding_category_sjis, | |
618 | coding_category_big5, | |
619 | coding_category_ccl, | |
620 | coding_category_emacs_mule, | |
621 | /* All above are targets of code detection. */ | |
622 | coding_category_raw_text, | |
623 | coding_category_undecided, | |
624 | coding_category_max | |
625 | }; | |
626 | ||
627 | /* Definitions of flag bits used in detect_coding_XXXX. */ | |
628 | #define CATEGORY_MASK_ISO_7 (1 << coding_category_iso_7) | |
629 | #define CATEGORY_MASK_ISO_7_TIGHT (1 << coding_category_iso_7_tight) | |
630 | #define CATEGORY_MASK_ISO_8_1 (1 << coding_category_iso_8_1) | |
631 | #define CATEGORY_MASK_ISO_8_2 (1 << coding_category_iso_8_2) | |
632 | #define CATEGORY_MASK_ISO_7_ELSE (1 << coding_category_iso_7_else) | |
633 | #define CATEGORY_MASK_ISO_8_ELSE (1 << coding_category_iso_8_else) | |
634 | #define CATEGORY_MASK_UTF_8 (1 << coding_category_utf_8) | |
b49a1807 | 635 | #define CATEGORY_MASK_UTF_16_AUTO (1 << coding_category_utf_16_auto) |
df7492f9 KH |
636 | #define CATEGORY_MASK_UTF_16_BE (1 << coding_category_utf_16_be) |
637 | #define CATEGORY_MASK_UTF_16_LE (1 << coding_category_utf_16_le) | |
638 | #define CATEGORY_MASK_UTF_16_BE_NOSIG (1 << coding_category_utf_16_be_nosig) | |
639 | #define CATEGORY_MASK_UTF_16_LE_NOSIG (1 << coding_category_utf_16_le_nosig) | |
640 | #define CATEGORY_MASK_CHARSET (1 << coding_category_charset) | |
641 | #define CATEGORY_MASK_SJIS (1 << coding_category_sjis) | |
642 | #define CATEGORY_MASK_BIG5 (1 << coding_category_big5) | |
643 | #define CATEGORY_MASK_CCL (1 << coding_category_ccl) | |
644 | #define CATEGORY_MASK_EMACS_MULE (1 << coding_category_emacs_mule) | |
ff0dacd7 | 645 | #define CATEGORY_MASK_RAW_TEXT (1 << coding_category_raw_text) |
df7492f9 KH |
646 | |
647 | /* This value is returned if detect_coding_mask () find nothing other | |
648 | than ASCII characters. */ | |
649 | #define CATEGORY_MASK_ANY \ | |
650 | (CATEGORY_MASK_ISO_7 \ | |
651 | | CATEGORY_MASK_ISO_7_TIGHT \ | |
652 | | CATEGORY_MASK_ISO_8_1 \ | |
653 | | CATEGORY_MASK_ISO_8_2 \ | |
654 | | CATEGORY_MASK_ISO_7_ELSE \ | |
655 | | CATEGORY_MASK_ISO_8_ELSE \ | |
656 | | CATEGORY_MASK_UTF_8 \ | |
657 | | CATEGORY_MASK_UTF_16_BE \ | |
658 | | CATEGORY_MASK_UTF_16_LE \ | |
659 | | CATEGORY_MASK_UTF_16_BE_NOSIG \ | |
660 | | CATEGORY_MASK_UTF_16_LE_NOSIG \ | |
661 | | CATEGORY_MASK_CHARSET \ | |
662 | | CATEGORY_MASK_SJIS \ | |
663 | | CATEGORY_MASK_BIG5 \ | |
664 | | CATEGORY_MASK_CCL \ | |
665 | | CATEGORY_MASK_EMACS_MULE) | |
666 | ||
667 | ||
668 | #define CATEGORY_MASK_ISO_7BIT \ | |
669 | (CATEGORY_MASK_ISO_7 | CATEGORY_MASK_ISO_7_TIGHT) | |
670 | ||
671 | #define CATEGORY_MASK_ISO_8BIT \ | |
672 | (CATEGORY_MASK_ISO_8_1 | CATEGORY_MASK_ISO_8_2) | |
673 | ||
674 | #define CATEGORY_MASK_ISO_ELSE \ | |
675 | (CATEGORY_MASK_ISO_7_ELSE | CATEGORY_MASK_ISO_8_ELSE) | |
676 | ||
677 | #define CATEGORY_MASK_ISO_ESCAPE \ | |
678 | (CATEGORY_MASK_ISO_7 \ | |
679 | | CATEGORY_MASK_ISO_7_TIGHT \ | |
680 | | CATEGORY_MASK_ISO_7_ELSE \ | |
681 | | CATEGORY_MASK_ISO_8_ELSE) | |
682 | ||
683 | #define CATEGORY_MASK_ISO \ | |
684 | ( CATEGORY_MASK_ISO_7BIT \ | |
685 | | CATEGORY_MASK_ISO_8BIT \ | |
686 | | CATEGORY_MASK_ISO_ELSE) | |
687 | ||
688 | #define CATEGORY_MASK_UTF_16 \ | |
689 | (CATEGORY_MASK_UTF_16_BE \ | |
690 | | CATEGORY_MASK_UTF_16_LE \ | |
691 | | CATEGORY_MASK_UTF_16_BE_NOSIG \ | |
692 | | CATEGORY_MASK_UTF_16_LE_NOSIG) | |
693 | ||
694 | ||
695 | /* List of symbols `coding-category-xxx' ordered by priority. This | |
696 | variable is exposed to Emacs Lisp. */ | |
697 | static Lisp_Object Vcoding_category_list; | |
698 | ||
699 | /* Table of coding categories (Lisp symbols). This variable is for | |
700 | internal use oly. */ | |
701 | static Lisp_Object Vcoding_category_table; | |
702 | ||
703 | /* Table of coding-categories ordered by priority. */ | |
704 | static enum coding_category coding_priorities[coding_category_max]; | |
705 | ||
706 | /* Nth element is a coding context for the coding system bound to the | |
707 | Nth coding category. */ | |
708 | static struct coding_system coding_categories[coding_category_max]; | |
709 | ||
df7492f9 KH |
710 | /*** Commonly used macros and functions ***/ |
711 | ||
712 | #ifndef min | |
713 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
714 | #endif | |
715 | #ifndef max | |
716 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
717 | #endif | |
4ed46869 | 718 | |
df7492f9 KH |
719 | #define CODING_GET_INFO(coding, attrs, eol_type, charset_list) \ |
720 | do { \ | |
721 | attrs = CODING_ID_ATTRS (coding->id); \ | |
722 | eol_type = CODING_ID_EOL_TYPE (coding->id); \ | |
723 | if (VECTORP (eol_type)) \ | |
724 | eol_type = Qunix; \ | |
725 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); \ | |
726 | } while (0) | |
4ed46869 | 727 | |
4ed46869 | 728 | |
df7492f9 KH |
729 | /* Safely get one byte from the source text pointed by SRC which ends |
730 | at SRC_END, and set C to that byte. If there are not enough bytes | |
731 | in the source, it jumps to `no_more_source'. The caller | |
732 | should declare and set these variables appropriately in advance: | |
733 | src, src_end, multibytep | |
734 | */ | |
aa72b389 | 735 | |
df7492f9 | 736 | #define ONE_MORE_BYTE(c) \ |
aa72b389 | 737 | do { \ |
df7492f9 KH |
738 | if (src == src_end) \ |
739 | { \ | |
740 | if (src_base < src) \ | |
741 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; \ | |
742 | goto no_more_source; \ | |
743 | } \ | |
744 | c = *src++; \ | |
745 | if (multibytep && (c & 0x80)) \ | |
746 | { \ | |
747 | if ((c & 0xFE) != 0xC0) \ | |
748 | error ("Undecodable char found"); \ | |
749 | c = ((c & 1) << 6) | *src++; \ | |
750 | } \ | |
751 | consumed_chars++; \ | |
aa72b389 KH |
752 | } while (0) |
753 | ||
aa72b389 | 754 | |
df7492f9 KH |
755 | #define ONE_MORE_BYTE_NO_CHECK(c) \ |
756 | do { \ | |
757 | c = *src++; \ | |
758 | if (multibytep && (c & 0x80)) \ | |
759 | { \ | |
760 | if ((c & 0xFE) != 0xC0) \ | |
761 | error ("Undecodable char found"); \ | |
762 | c = ((c & 1) << 6) | *src++; \ | |
763 | } \ | |
781d7a48 | 764 | consumed_chars++; \ |
aa72b389 KH |
765 | } while (0) |
766 | ||
aa72b389 | 767 | |
df7492f9 KH |
768 | /* Store a byte C in the place pointed by DST and increment DST to the |
769 | next free point, and increment PRODUCED_CHARS. The caller should | |
770 | assure that C is 0..127, and declare and set the variable `dst' | |
771 | appropriately in advance. | |
772 | */ | |
aa72b389 KH |
773 | |
774 | ||
df7492f9 KH |
775 | #define EMIT_ONE_ASCII_BYTE(c) \ |
776 | do { \ | |
777 | produced_chars++; \ | |
778 | *dst++ = (c); \ | |
b6871cc7 | 779 | } while (0) |
aa72b389 KH |
780 | |
781 | ||
df7492f9 | 782 | /* Like EMIT_ONE_ASCII_BYTE byt store two bytes; C1 and C2. */ |
aa72b389 | 783 | |
df7492f9 KH |
784 | #define EMIT_TWO_ASCII_BYTES(c1, c2) \ |
785 | do { \ | |
786 | produced_chars += 2; \ | |
787 | *dst++ = (c1), *dst++ = (c2); \ | |
788 | } while (0) | |
aa72b389 KH |
789 | |
790 | ||
df7492f9 KH |
791 | /* Store a byte C in the place pointed by DST and increment DST to the |
792 | next free point, and increment PRODUCED_CHARS. If MULTIBYTEP is | |
793 | nonzero, store in an appropriate multibyte from. The caller should | |
794 | declare and set the variables `dst' and `multibytep' appropriately | |
795 | in advance. */ | |
796 | ||
797 | #define EMIT_ONE_BYTE(c) \ | |
798 | do { \ | |
799 | produced_chars++; \ | |
800 | if (multibytep) \ | |
801 | { \ | |
802 | int ch = (c); \ | |
803 | if (ch >= 0x80) \ | |
804 | ch = BYTE8_TO_CHAR (ch); \ | |
805 | CHAR_STRING_ADVANCE (ch, dst); \ | |
806 | } \ | |
807 | else \ | |
808 | *dst++ = (c); \ | |
aa72b389 | 809 | } while (0) |
aa72b389 | 810 | |
aa72b389 | 811 | |
df7492f9 | 812 | /* Like EMIT_ONE_BYTE, but emit two bytes; C1 and C2. */ |
aa72b389 | 813 | |
e19c3639 KH |
814 | #define EMIT_TWO_BYTES(c1, c2) \ |
815 | do { \ | |
816 | produced_chars += 2; \ | |
817 | if (multibytep) \ | |
818 | { \ | |
819 | int ch; \ | |
820 | \ | |
821 | ch = (c1); \ | |
822 | if (ch >= 0x80) \ | |
823 | ch = BYTE8_TO_CHAR (ch); \ | |
824 | CHAR_STRING_ADVANCE (ch, dst); \ | |
825 | ch = (c2); \ | |
826 | if (ch >= 0x80) \ | |
827 | ch = BYTE8_TO_CHAR (ch); \ | |
828 | CHAR_STRING_ADVANCE (ch, dst); \ | |
829 | } \ | |
830 | else \ | |
831 | { \ | |
832 | *dst++ = (c1); \ | |
833 | *dst++ = (c2); \ | |
834 | } \ | |
aa72b389 KH |
835 | } while (0) |
836 | ||
837 | ||
df7492f9 KH |
838 | #define EMIT_THREE_BYTES(c1, c2, c3) \ |
839 | do { \ | |
840 | EMIT_ONE_BYTE (c1); \ | |
841 | EMIT_TWO_BYTES (c2, c3); \ | |
842 | } while (0) | |
aa72b389 | 843 | |
aa72b389 | 844 | |
df7492f9 KH |
845 | #define EMIT_FOUR_BYTES(c1, c2, c3, c4) \ |
846 | do { \ | |
847 | EMIT_TWO_BYTES (c1, c2); \ | |
848 | EMIT_TWO_BYTES (c3, c4); \ | |
849 | } while (0) | |
aa72b389 | 850 | |
aa72b389 | 851 | |
df7492f9 KH |
852 | #define CODING_DECODE_CHAR(coding, src, src_base, src_end, charset, code, c) \ |
853 | do { \ | |
854 | charset_map_loaded = 0; \ | |
855 | c = DECODE_CHAR (charset, code); \ | |
856 | if (charset_map_loaded) \ | |
857 | { \ | |
8f924df7 | 858 | const unsigned char *orig = coding->source; \ |
df7492f9 KH |
859 | EMACS_INT offset; \ |
860 | \ | |
861 | coding_set_source (coding); \ | |
862 | offset = coding->source - orig; \ | |
863 | src += offset; \ | |
864 | src_base += offset; \ | |
865 | src_end += offset; \ | |
866 | } \ | |
aa72b389 KH |
867 | } while (0) |
868 | ||
869 | ||
df7492f9 KH |
870 | #define ASSURE_DESTINATION(bytes) \ |
871 | do { \ | |
872 | if (dst + (bytes) >= dst_end) \ | |
873 | { \ | |
874 | int more_bytes = charbuf_end - charbuf + (bytes); \ | |
875 | \ | |
876 | dst = alloc_destination (coding, more_bytes, dst); \ | |
877 | dst_end = coding->destination + coding->dst_bytes; \ | |
878 | } \ | |
879 | } while (0) | |
aa72b389 | 880 | |
aa72b389 | 881 | |
aa72b389 | 882 | |
df7492f9 KH |
883 | static void |
884 | coding_set_source (coding) | |
aa72b389 | 885 | struct coding_system *coding; |
aa72b389 | 886 | { |
df7492f9 KH |
887 | if (BUFFERP (coding->src_object)) |
888 | { | |
2cb26057 | 889 | struct buffer *buf = XBUFFER (coding->src_object); |
aa72b389 | 890 | |
df7492f9 | 891 | if (coding->src_pos < 0) |
2cb26057 | 892 | coding->source = BUF_GAP_END_ADDR (buf) + coding->src_pos_byte; |
df7492f9 | 893 | else |
2cb26057 | 894 | coding->source = BUF_BYTE_ADDRESS (buf, coding->src_pos_byte); |
aa72b389 | 895 | } |
df7492f9 | 896 | else if (STRINGP (coding->src_object)) |
aa72b389 | 897 | { |
8f924df7 | 898 | coding->source = SDATA (coding->src_object) + coding->src_pos_byte; |
aa72b389 | 899 | } |
df7492f9 KH |
900 | else |
901 | /* Otherwise, the source is C string and is never relocated | |
902 | automatically. Thus we don't have to update anything. */ | |
903 | ; | |
904 | } | |
aa72b389 | 905 | |
df7492f9 KH |
906 | static void |
907 | coding_set_destination (coding) | |
908 | struct coding_system *coding; | |
909 | { | |
910 | if (BUFFERP (coding->dst_object)) | |
aa72b389 | 911 | { |
df7492f9 | 912 | if (coding->src_pos < 0) |
aa72b389 | 913 | { |
28f67a95 KH |
914 | coding->destination = BEG_ADDR + coding->dst_pos_byte - 1; |
915 | coding->dst_bytes = (GAP_END_ADDR | |
916 | - (coding->src_bytes - coding->consumed) | |
917 | - coding->destination); | |
aa72b389 | 918 | } |
df7492f9 | 919 | else |
28f67a95 KH |
920 | { |
921 | /* We are sure that coding->dst_pos_byte is before the gap | |
922 | of the buffer. */ | |
923 | coding->destination = (BUF_BEG_ADDR (XBUFFER (coding->dst_object)) | |
924 | + coding->dst_pos_byte - 1); | |
925 | coding->dst_bytes = (BUF_GAP_END_ADDR (XBUFFER (coding->dst_object)) | |
926 | - coding->destination); | |
927 | } | |
df7492f9 KH |
928 | } |
929 | else | |
930 | /* Otherwise, the destination is C string and is never relocated | |
931 | automatically. Thus we don't have to update anything. */ | |
932 | ; | |
933 | } | |
934 | ||
935 | ||
936 | static void | |
937 | coding_alloc_by_realloc (coding, bytes) | |
938 | struct coding_system *coding; | |
939 | EMACS_INT bytes; | |
940 | { | |
941 | coding->destination = (unsigned char *) xrealloc (coding->destination, | |
942 | coding->dst_bytes + bytes); | |
943 | coding->dst_bytes += bytes; | |
944 | } | |
945 | ||
946 | static void | |
947 | coding_alloc_by_making_gap (coding, bytes) | |
948 | struct coding_system *coding; | |
949 | EMACS_INT bytes; | |
950 | { | |
2c78b7e1 KH |
951 | if (BUFFERP (coding->dst_object) |
952 | && EQ (coding->src_object, coding->dst_object)) | |
df7492f9 KH |
953 | { |
954 | EMACS_INT add = coding->src_bytes - coding->consumed; | |
955 | ||
956 | GAP_SIZE -= add; ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
957 | make_gap (bytes); | |
958 | GAP_SIZE += add; ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
959 | } | |
960 | else | |
961 | { | |
2c78b7e1 KH |
962 | Lisp_Object this_buffer; |
963 | ||
964 | this_buffer = Fcurrent_buffer (); | |
df7492f9 KH |
965 | set_buffer_internal (XBUFFER (coding->dst_object)); |
966 | make_gap (bytes); | |
967 | set_buffer_internal (XBUFFER (this_buffer)); | |
aa72b389 | 968 | } |
df7492f9 | 969 | } |
8f924df7 | 970 | |
df7492f9 KH |
971 | |
972 | static unsigned char * | |
973 | alloc_destination (coding, nbytes, dst) | |
974 | struct coding_system *coding; | |
975 | int nbytes; | |
976 | unsigned char *dst; | |
977 | { | |
978 | EMACS_INT offset = dst - coding->destination; | |
979 | ||
980 | if (BUFFERP (coding->dst_object)) | |
981 | coding_alloc_by_making_gap (coding, nbytes); | |
aa72b389 | 982 | else |
df7492f9 KH |
983 | coding_alloc_by_realloc (coding, nbytes); |
984 | coding->result = CODING_RESULT_SUCCESS; | |
985 | coding_set_destination (coding); | |
986 | dst = coding->destination + offset; | |
987 | return dst; | |
988 | } | |
aa72b389 | 989 | |
ff0dacd7 KH |
990 | /** Macros for annotations. */ |
991 | ||
992 | /* Maximum length of annotation data (sum of annotations for | |
993 | composition and charset). */ | |
994 | #define MAX_ANNOTATION_LENGTH (5 + (MAX_COMPOSITION_COMPONENTS * 2) - 1 + 5) | |
995 | ||
996 | /* An annotation data is stored in the array coding->charbuf in this | |
997 | format: | |
998 | [ -LENGTH ANNOTATION_MASK FROM TO ... ] | |
999 | LENGTH is the number of elements in the annotation. | |
1000 | ANNOTATION_MASK is one of CODING_ANNOTATE_XXX_MASK. | |
1001 | FROM and TO specify the range of text annotated. They are relative | |
1002 | to coding->src_pos (on encoding) or coding->dst_pos (on decoding). | |
1003 | ||
1004 | The format of the following elements depend on ANNOTATION_MASK. | |
1005 | ||
1006 | In the case of CODING_ANNOTATE_COMPOSITION_MASK, these elements | |
1007 | follows: | |
1008 | ... METHOD [ COMPOSITION-COMPONENTS ... ] | |
1009 | METHOD is one of enum composition_method. | |
1010 | Optionnal COMPOSITION-COMPONENTS are characters and composition | |
1011 | rules. | |
1012 | ||
1013 | In the case of CODING_ANNOTATE_CHARSET_MASK, one element CHARSET-ID | |
1014 | follows. */ | |
1015 | ||
1016 | #define ADD_ANNOTATION_DATA(buf, len, mask, from, to) \ | |
1017 | do { \ | |
1018 | *(buf)++ = -(len); \ | |
1019 | *(buf)++ = (mask); \ | |
1020 | *(buf)++ = (from); \ | |
1021 | *(buf)++ = (to); \ | |
1022 | coding->annotated = 1; \ | |
1023 | } while (0); | |
1024 | ||
1025 | #define ADD_COMPOSITION_DATA(buf, from, to, method) \ | |
1026 | do { \ | |
1027 | ADD_ANNOTATION_DATA (buf, 5, CODING_ANNOTATE_COMPOSITION_MASK, from, to); \ | |
1028 | *buf++ = method; \ | |
1029 | } while (0) | |
1030 | ||
1031 | ||
1032 | #define ADD_CHARSET_DATA(buf, from, to, id) \ | |
1033 | do { \ | |
1034 | ADD_ANNOTATION_DATA (buf, 5, CODING_ANNOTATE_CHARSET_MASK, from, to); \ | |
1035 | *buf++ = id; \ | |
1036 | } while (0) | |
1037 | ||
df7492f9 KH |
1038 | \f |
1039 | /*** 2. Emacs' internal format (emacs-utf-8) ***/ | |
1040 | ||
1041 | ||
1042 | ||
1043 | \f | |
1044 | /*** 3. UTF-8 ***/ | |
1045 | ||
1046 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
ff0dacd7 KH |
1047 | Check if a text is encoded in UTF-8. If it is, return 1, else |
1048 | return 0. */ | |
df7492f9 KH |
1049 | |
1050 | #define UTF_8_1_OCTET_P(c) ((c) < 0x80) | |
1051 | #define UTF_8_EXTRA_OCTET_P(c) (((c) & 0xC0) == 0x80) | |
1052 | #define UTF_8_2_OCTET_LEADING_P(c) (((c) & 0xE0) == 0xC0) | |
1053 | #define UTF_8_3_OCTET_LEADING_P(c) (((c) & 0xF0) == 0xE0) | |
1054 | #define UTF_8_4_OCTET_LEADING_P(c) (((c) & 0xF8) == 0xF0) | |
1055 | #define UTF_8_5_OCTET_LEADING_P(c) (((c) & 0xFC) == 0xF8) | |
1056 | ||
1057 | static int | |
ff0dacd7 | 1058 | detect_coding_utf_8 (coding, detect_info) |
df7492f9 | 1059 | struct coding_system *coding; |
ff0dacd7 | 1060 | struct coding_detection_info *detect_info; |
df7492f9 | 1061 | { |
8f924df7 KH |
1062 | const unsigned char *src = coding->source, *src_base = src; |
1063 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
df7492f9 KH |
1064 | int multibytep = coding->src_multibyte; |
1065 | int consumed_chars = 0; | |
1066 | int found = 0; | |
89528eb3 | 1067 | int incomplete; |
df7492f9 | 1068 | |
ff0dacd7 | 1069 | detect_info->checked |= CATEGORY_MASK_UTF_8; |
df7492f9 KH |
1070 | /* A coding system of this category is always ASCII compatible. */ |
1071 | src += coding->head_ascii; | |
1072 | ||
1073 | while (1) | |
aa72b389 | 1074 | { |
df7492f9 | 1075 | int c, c1, c2, c3, c4; |
aa72b389 | 1076 | |
89528eb3 | 1077 | incomplete = 0; |
df7492f9 KH |
1078 | ONE_MORE_BYTE (c); |
1079 | if (UTF_8_1_OCTET_P (c)) | |
1080 | continue; | |
89528eb3 | 1081 | incomplete = 1; |
df7492f9 KH |
1082 | ONE_MORE_BYTE (c1); |
1083 | if (! UTF_8_EXTRA_OCTET_P (c1)) | |
1084 | break; | |
1085 | if (UTF_8_2_OCTET_LEADING_P (c)) | |
aa72b389 | 1086 | { |
ff0dacd7 | 1087 | found = CATEGORY_MASK_UTF_8; |
df7492f9 | 1088 | continue; |
aa72b389 | 1089 | } |
df7492f9 KH |
1090 | ONE_MORE_BYTE (c2); |
1091 | if (! UTF_8_EXTRA_OCTET_P (c2)) | |
1092 | break; | |
1093 | if (UTF_8_3_OCTET_LEADING_P (c)) | |
aa72b389 | 1094 | { |
ff0dacd7 | 1095 | found = CATEGORY_MASK_UTF_8; |
df7492f9 | 1096 | continue; |
aa72b389 | 1097 | } |
df7492f9 KH |
1098 | ONE_MORE_BYTE (c3); |
1099 | if (! UTF_8_EXTRA_OCTET_P (c3)) | |
1100 | break; | |
1101 | if (UTF_8_4_OCTET_LEADING_P (c)) | |
aa72b389 | 1102 | { |
ff0dacd7 | 1103 | found = CATEGORY_MASK_UTF_8; |
df7492f9 KH |
1104 | continue; |
1105 | } | |
1106 | ONE_MORE_BYTE (c4); | |
1107 | if (! UTF_8_EXTRA_OCTET_P (c4)) | |
1108 | break; | |
1109 | if (UTF_8_5_OCTET_LEADING_P (c)) | |
1110 | { | |
ff0dacd7 | 1111 | found = CATEGORY_MASK_UTF_8; |
df7492f9 KH |
1112 | continue; |
1113 | } | |
1114 | break; | |
aa72b389 | 1115 | } |
ff0dacd7 | 1116 | detect_info->rejected |= CATEGORY_MASK_UTF_8; |
df7492f9 | 1117 | return 0; |
aa72b389 | 1118 | |
df7492f9 | 1119 | no_more_source: |
89528eb3 | 1120 | if (incomplete && coding->mode & CODING_MODE_LAST_BLOCK) |
aa72b389 | 1121 | { |
ff0dacd7 | 1122 | detect_info->rejected |= CATEGORY_MASK_UTF_8; |
89528eb3 | 1123 | return 0; |
aa72b389 | 1124 | } |
ff0dacd7 KH |
1125 | detect_info->found |= found; |
1126 | return 1; | |
aa72b389 KH |
1127 | } |
1128 | ||
4ed46869 | 1129 | |
b73bfc1c | 1130 | static void |
df7492f9 | 1131 | decode_coding_utf_8 (coding) |
b73bfc1c | 1132 | struct coding_system *coding; |
b73bfc1c | 1133 | { |
8f924df7 KH |
1134 | const unsigned char *src = coding->source + coding->consumed; |
1135 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
1136 | const unsigned char *src_base; | |
df7492f9 KH |
1137 | int *charbuf = coding->charbuf; |
1138 | int *charbuf_end = charbuf + coding->charbuf_size; | |
1139 | int consumed_chars = 0, consumed_chars_base; | |
1140 | int multibytep = coding->src_multibyte; | |
1141 | Lisp_Object attr, eol_type, charset_list; | |
4ed46869 | 1142 | |
df7492f9 KH |
1143 | CODING_GET_INFO (coding, attr, eol_type, charset_list); |
1144 | ||
1145 | while (1) | |
b73bfc1c | 1146 | { |
df7492f9 | 1147 | int c, c1, c2, c3, c4, c5; |
ec6d2bb8 | 1148 | |
df7492f9 KH |
1149 | src_base = src; |
1150 | consumed_chars_base = consumed_chars; | |
4af310db | 1151 | |
df7492f9 KH |
1152 | if (charbuf >= charbuf_end) |
1153 | break; | |
1154 | ||
1155 | ONE_MORE_BYTE (c1); | |
1156 | if (UTF_8_1_OCTET_P(c1)) | |
1157 | { | |
1158 | c = c1; | |
1159 | if (c == '\r') | |
4af310db | 1160 | { |
df7492f9 | 1161 | if (EQ (eol_type, Qdos)) |
4af310db | 1162 | { |
df7492f9 | 1163 | if (src == src_end) |
98725083 KH |
1164 | { |
1165 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; | |
1166 | goto no_more_source; | |
1167 | } | |
df7492f9 KH |
1168 | if (*src == '\n') |
1169 | ONE_MORE_BYTE (c); | |
4af310db | 1170 | } |
df7492f9 KH |
1171 | else if (EQ (eol_type, Qmac)) |
1172 | c = '\n'; | |
4af310db | 1173 | } |
4af310db | 1174 | } |
df7492f9 | 1175 | else |
4af310db | 1176 | { |
df7492f9 KH |
1177 | ONE_MORE_BYTE (c2); |
1178 | if (! UTF_8_EXTRA_OCTET_P (c2)) | |
1179 | goto invalid_code; | |
1180 | if (UTF_8_2_OCTET_LEADING_P (c1)) | |
4af310db | 1181 | { |
b0edb2c5 DL |
1182 | c = ((c1 & 0x1F) << 6) | (c2 & 0x3F); |
1183 | /* Reject overlong sequences here and below. Encoders | |
1184 | producing them are incorrect, they can be misleading, | |
1185 | and they mess up read/write invariance. */ | |
1186 | if (c < 128) | |
1187 | goto invalid_code; | |
4af310db | 1188 | } |
df7492f9 | 1189 | else |
aa72b389 | 1190 | { |
df7492f9 KH |
1191 | ONE_MORE_BYTE (c3); |
1192 | if (! UTF_8_EXTRA_OCTET_P (c3)) | |
1193 | goto invalid_code; | |
1194 | if (UTF_8_3_OCTET_LEADING_P (c1)) | |
b0edb2c5 DL |
1195 | { |
1196 | c = (((c1 & 0xF) << 12) | |
1197 | | ((c2 & 0x3F) << 6) | (c3 & 0x3F)); | |
72fe1301 DL |
1198 | if (c < 0x800 |
1199 | || (c >= 0xd800 && c < 0xe000)) /* surrogates (invalid) */ | |
b0edb2c5 DL |
1200 | goto invalid_code; |
1201 | } | |
df7492f9 KH |
1202 | else |
1203 | { | |
1204 | ONE_MORE_BYTE (c4); | |
1205 | if (! UTF_8_EXTRA_OCTET_P (c4)) | |
1206 | goto invalid_code; | |
1207 | if (UTF_8_4_OCTET_LEADING_P (c1)) | |
b0edb2c5 | 1208 | { |
df7492f9 KH |
1209 | c = (((c1 & 0x7) << 18) | ((c2 & 0x3F) << 12) |
1210 | | ((c3 & 0x3F) << 6) | (c4 & 0x3F)); | |
b0edb2c5 DL |
1211 | if (c < 0x10000) |
1212 | goto invalid_code; | |
1213 | } | |
df7492f9 KH |
1214 | else |
1215 | { | |
1216 | ONE_MORE_BYTE (c5); | |
1217 | if (! UTF_8_EXTRA_OCTET_P (c5)) | |
1218 | goto invalid_code; | |
1219 | if (UTF_8_5_OCTET_LEADING_P (c1)) | |
1220 | { | |
1221 | c = (((c1 & 0x3) << 24) | ((c2 & 0x3F) << 18) | |
1222 | | ((c3 & 0x3F) << 12) | ((c4 & 0x3F) << 6) | |
1223 | | (c5 & 0x3F)); | |
b0edb2c5 | 1224 | if ((c > MAX_CHAR) || (c < 0x200000)) |
df7492f9 KH |
1225 | goto invalid_code; |
1226 | } | |
1227 | else | |
1228 | goto invalid_code; | |
1229 | } | |
1230 | } | |
aa72b389 | 1231 | } |
b73bfc1c | 1232 | } |
df7492f9 KH |
1233 | |
1234 | *charbuf++ = c; | |
1235 | continue; | |
1236 | ||
1237 | invalid_code: | |
1238 | src = src_base; | |
1239 | consumed_chars = consumed_chars_base; | |
1240 | ONE_MORE_BYTE (c); | |
1241 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
1242 | coding->errors++; | |
aa72b389 KH |
1243 | } |
1244 | ||
df7492f9 KH |
1245 | no_more_source: |
1246 | coding->consumed_char += consumed_chars_base; | |
1247 | coding->consumed = src_base - coding->source; | |
1248 | coding->charbuf_used = charbuf - coding->charbuf; | |
1249 | } | |
1250 | ||
1251 | ||
1252 | static int | |
1253 | encode_coding_utf_8 (coding) | |
1254 | struct coding_system *coding; | |
1255 | { | |
1256 | int multibytep = coding->dst_multibyte; | |
1257 | int *charbuf = coding->charbuf; | |
1258 | int *charbuf_end = charbuf + coding->charbuf_used; | |
1259 | unsigned char *dst = coding->destination + coding->produced; | |
1260 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
e19c3639 | 1261 | int produced_chars = 0; |
df7492f9 KH |
1262 | int c; |
1263 | ||
1264 | if (multibytep) | |
aa72b389 | 1265 | { |
df7492f9 KH |
1266 | int safe_room = MAX_MULTIBYTE_LENGTH * 2; |
1267 | ||
1268 | while (charbuf < charbuf_end) | |
b73bfc1c | 1269 | { |
df7492f9 | 1270 | unsigned char str[MAX_MULTIBYTE_LENGTH], *p, *pend = str; |
8f924df7 | 1271 | |
df7492f9 KH |
1272 | ASSURE_DESTINATION (safe_room); |
1273 | c = *charbuf++; | |
28f67a95 KH |
1274 | if (CHAR_BYTE8_P (c)) |
1275 | { | |
1276 | c = CHAR_TO_BYTE8 (c); | |
1277 | EMIT_ONE_BYTE (c); | |
1278 | } | |
1279 | else | |
1280 | { | |
1281 | CHAR_STRING_ADVANCE (c, pend); | |
1282 | for (p = str; p < pend; p++) | |
1283 | EMIT_ONE_BYTE (*p); | |
1284 | } | |
b73bfc1c | 1285 | } |
aa72b389 | 1286 | } |
df7492f9 KH |
1287 | else |
1288 | { | |
1289 | int safe_room = MAX_MULTIBYTE_LENGTH; | |
1290 | ||
1291 | while (charbuf < charbuf_end) | |
b73bfc1c | 1292 | { |
df7492f9 KH |
1293 | ASSURE_DESTINATION (safe_room); |
1294 | c = *charbuf++; | |
1295 | dst += CHAR_STRING (c, dst); | |
1296 | produced_chars++; | |
4ed46869 KH |
1297 | } |
1298 | } | |
df7492f9 KH |
1299 | coding->result = CODING_RESULT_SUCCESS; |
1300 | coding->produced_char += produced_chars; | |
1301 | coding->produced = dst - coding->destination; | |
1302 | return 0; | |
4ed46869 KH |
1303 | } |
1304 | ||
b73bfc1c | 1305 | |
df7492f9 | 1306 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
ff0dacd7 KH |
1307 | Check if a text is encoded in one of UTF-16 based coding systems. |
1308 | If it is, return 1, else return 0. */ | |
aa72b389 | 1309 | |
df7492f9 KH |
1310 | #define UTF_16_HIGH_SURROGATE_P(val) \ |
1311 | (((val) & 0xFC00) == 0xD800) | |
1312 | ||
1313 | #define UTF_16_LOW_SURROGATE_P(val) \ | |
1314 | (((val) & 0xFC00) == 0xDC00) | |
93dec019 | 1315 | |
df7492f9 KH |
1316 | #define UTF_16_INVALID_P(val) \ |
1317 | (((val) == 0xFFFE) \ | |
1318 | || ((val) == 0xFFFF) \ | |
1319 | || UTF_16_LOW_SURROGATE_P (val)) | |
aa72b389 | 1320 | |
aa72b389 | 1321 | |
df7492f9 | 1322 | static int |
ff0dacd7 | 1323 | detect_coding_utf_16 (coding, detect_info) |
aa72b389 | 1324 | struct coding_system *coding; |
ff0dacd7 | 1325 | struct coding_detection_info *detect_info; |
aa72b389 | 1326 | { |
8f924df7 KH |
1327 | const unsigned char *src = coding->source, *src_base = src; |
1328 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
df7492f9 KH |
1329 | int multibytep = coding->src_multibyte; |
1330 | int consumed_chars = 0; | |
1331 | int c1, c2; | |
aa72b389 | 1332 | |
ff0dacd7 | 1333 | detect_info->checked |= CATEGORY_MASK_UTF_16; |
aa72b389 | 1334 | |
ff0dacd7 KH |
1335 | if (coding->mode & CODING_MODE_LAST_BLOCK |
1336 | && (coding->src_bytes & 1)) | |
1337 | { | |
1338 | detect_info->rejected |= CATEGORY_MASK_UTF_16; | |
1339 | return 0; | |
1340 | } | |
df7492f9 KH |
1341 | ONE_MORE_BYTE (c1); |
1342 | ONE_MORE_BYTE (c2); | |
aa72b389 | 1343 | |
df7492f9 | 1344 | if ((c1 == 0xFF) && (c2 == 0xFE)) |
aa72b389 | 1345 | { |
b49a1807 KH |
1346 | detect_info->found |= (CATEGORY_MASK_UTF_16_LE |
1347 | | CATEGORY_MASK_UTF_16_AUTO); | |
ff0dacd7 | 1348 | detect_info->rejected |= CATEGORY_MASK_UTF_16_BE; |
aa72b389 | 1349 | } |
df7492f9 | 1350 | else if ((c1 == 0xFE) && (c2 == 0xFF)) |
ff0dacd7 | 1351 | { |
b49a1807 KH |
1352 | detect_info->found |= (CATEGORY_MASK_UTF_16_BE |
1353 | | CATEGORY_MASK_UTF_16_AUTO); | |
ff0dacd7 KH |
1354 | detect_info->rejected |= CATEGORY_MASK_UTF_16_LE; |
1355 | } | |
df7492f9 | 1356 | no_more_source: |
ff0dacd7 | 1357 | return 1; |
df7492f9 | 1358 | } |
aa72b389 | 1359 | |
df7492f9 KH |
1360 | static void |
1361 | decode_coding_utf_16 (coding) | |
1362 | struct coding_system *coding; | |
1363 | { | |
8f924df7 KH |
1364 | const unsigned char *src = coding->source + coding->consumed; |
1365 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
1366 | const unsigned char *src_base; | |
df7492f9 KH |
1367 | int *charbuf = coding->charbuf; |
1368 | int *charbuf_end = charbuf + coding->charbuf_size; | |
1369 | int consumed_chars = 0, consumed_chars_base; | |
1370 | int multibytep = coding->src_multibyte; | |
1371 | enum utf_16_bom_type bom = CODING_UTF_16_BOM (coding); | |
1372 | enum utf_16_endian_type endian = CODING_UTF_16_ENDIAN (coding); | |
1373 | int surrogate = CODING_UTF_16_SURROGATE (coding); | |
1374 | Lisp_Object attr, eol_type, charset_list; | |
1375 | ||
1376 | CODING_GET_INFO (coding, attr, eol_type, charset_list); | |
1377 | ||
b49a1807 | 1378 | if (bom == utf_16_with_bom) |
aa72b389 | 1379 | { |
df7492f9 | 1380 | int c, c1, c2; |
4af310db | 1381 | |
aa72b389 | 1382 | src_base = src; |
df7492f9 KH |
1383 | ONE_MORE_BYTE (c1); |
1384 | ONE_MORE_BYTE (c2); | |
e19c3639 | 1385 | c = (c1 << 8) | c2; |
aa72b389 | 1386 | |
b49a1807 KH |
1387 | if (endian == utf_16_big_endian |
1388 | ? c != 0xFEFF : c != 0xFFFE) | |
aa72b389 | 1389 | { |
b49a1807 KH |
1390 | /* The first two bytes are not BOM. Treat them as bytes |
1391 | for a normal character. */ | |
1392 | src = src_base; | |
1393 | coding->errors++; | |
aa72b389 | 1394 | } |
b49a1807 KH |
1395 | CODING_UTF_16_BOM (coding) = utf_16_without_bom; |
1396 | } | |
1397 | else if (bom == utf_16_detect_bom) | |
1398 | { | |
1399 | /* We have already tried to detect BOM and failed in | |
1400 | detect_coding. */ | |
1401 | CODING_UTF_16_BOM (coding) = utf_16_without_bom; | |
df7492f9 | 1402 | } |
aa72b389 | 1403 | |
df7492f9 KH |
1404 | while (1) |
1405 | { | |
1406 | int c, c1, c2; | |
1407 | ||
1408 | src_base = src; | |
1409 | consumed_chars_base = consumed_chars; | |
1410 | ||
1411 | if (charbuf + 2 >= charbuf_end) | |
1412 | break; | |
1413 | ||
1414 | ONE_MORE_BYTE (c1); | |
1415 | ONE_MORE_BYTE (c2); | |
1416 | c = (endian == utf_16_big_endian | |
e19c3639 | 1417 | ? ((c1 << 8) | c2) : ((c2 << 8) | c1)); |
df7492f9 | 1418 | if (surrogate) |
fd3ae0b9 | 1419 | { |
df7492f9 | 1420 | if (! UTF_16_LOW_SURROGATE_P (c)) |
fd3ae0b9 | 1421 | { |
df7492f9 KH |
1422 | if (endian == utf_16_big_endian) |
1423 | c1 = surrogate >> 8, c2 = surrogate & 0xFF; | |
1424 | else | |
1425 | c1 = surrogate & 0xFF, c2 = surrogate >> 8; | |
1426 | *charbuf++ = c1; | |
1427 | *charbuf++ = c2; | |
1428 | coding->errors++; | |
1429 | if (UTF_16_HIGH_SURROGATE_P (c)) | |
1430 | CODING_UTF_16_SURROGATE (coding) = surrogate = c; | |
fd3ae0b9 | 1431 | else |
df7492f9 | 1432 | *charbuf++ = c; |
fd3ae0b9 KH |
1433 | } |
1434 | else | |
df7492f9 KH |
1435 | { |
1436 | c = ((surrogate - 0xD800) << 10) | (c - 0xDC00); | |
1437 | CODING_UTF_16_SURROGATE (coding) = surrogate = 0; | |
1438 | *charbuf++ = c; | |
1439 | } | |
fd3ae0b9 | 1440 | } |
aa72b389 | 1441 | else |
df7492f9 KH |
1442 | { |
1443 | if (UTF_16_HIGH_SURROGATE_P (c)) | |
1444 | CODING_UTF_16_SURROGATE (coding) = surrogate = c; | |
1445 | else | |
1446 | *charbuf++ = c; | |
8f924df7 | 1447 | } |
aa72b389 | 1448 | } |
df7492f9 KH |
1449 | |
1450 | no_more_source: | |
1451 | coding->consumed_char += consumed_chars_base; | |
1452 | coding->consumed = src_base - coding->source; | |
1453 | coding->charbuf_used = charbuf - coding->charbuf; | |
aa72b389 | 1454 | } |
b73bfc1c | 1455 | |
df7492f9 KH |
1456 | static int |
1457 | encode_coding_utf_16 (coding) | |
1458 | struct coding_system *coding; | |
1459 | { | |
1460 | int multibytep = coding->dst_multibyte; | |
1461 | int *charbuf = coding->charbuf; | |
1462 | int *charbuf_end = charbuf + coding->charbuf_used; | |
1463 | unsigned char *dst = coding->destination + coding->produced; | |
1464 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
1465 | int safe_room = 8; | |
1466 | enum utf_16_bom_type bom = CODING_UTF_16_BOM (coding); | |
1467 | int big_endian = CODING_UTF_16_ENDIAN (coding) == utf_16_big_endian; | |
1468 | int produced_chars = 0; | |
1469 | Lisp_Object attrs, eol_type, charset_list; | |
1470 | int c; | |
4ed46869 | 1471 | |
df7492f9 KH |
1472 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
1473 | ||
b49a1807 | 1474 | if (bom != utf_16_without_bom) |
df7492f9 KH |
1475 | { |
1476 | ASSURE_DESTINATION (safe_room); | |
1477 | if (big_endian) | |
df7492f9 | 1478 | EMIT_TWO_BYTES (0xFE, 0xFF); |
880cf180 KH |
1479 | else |
1480 | EMIT_TWO_BYTES (0xFF, 0xFE); | |
df7492f9 KH |
1481 | CODING_UTF_16_BOM (coding) = utf_16_without_bom; |
1482 | } | |
1483 | ||
1484 | while (charbuf < charbuf_end) | |
1485 | { | |
1486 | ASSURE_DESTINATION (safe_room); | |
1487 | c = *charbuf++; | |
e19c3639 KH |
1488 | if (c >= MAX_UNICODE_CHAR) |
1489 | c = coding->default_char; | |
df7492f9 KH |
1490 | |
1491 | if (c < 0x10000) | |
1492 | { | |
1493 | if (big_endian) | |
1494 | EMIT_TWO_BYTES (c >> 8, c & 0xFF); | |
1495 | else | |
1496 | EMIT_TWO_BYTES (c & 0xFF, c >> 8); | |
1497 | } | |
1498 | else | |
1499 | { | |
1500 | int c1, c2; | |
1501 | ||
1502 | c -= 0x10000; | |
1503 | c1 = (c >> 10) + 0xD800; | |
1504 | c2 = (c & 0x3FF) + 0xDC00; | |
1505 | if (big_endian) | |
1506 | EMIT_FOUR_BYTES (c1 >> 8, c1 & 0xFF, c2 >> 8, c2 & 0xFF); | |
1507 | else | |
1508 | EMIT_FOUR_BYTES (c1 & 0xFF, c1 >> 8, c2 & 0xFF, c2 >> 8); | |
1509 | } | |
1510 | } | |
1511 | coding->result = CODING_RESULT_SUCCESS; | |
1512 | coding->produced = dst - coding->destination; | |
1513 | coding->produced_char += produced_chars; | |
1514 | return 0; | |
1515 | } | |
1516 | ||
1517 | \f | |
1518 | /*** 6. Old Emacs' internal format (emacs-mule) ***/ | |
1519 | ||
1520 | /* Emacs' internal format for representation of multiple character | |
1521 | sets is a kind of multi-byte encoding, i.e. characters are | |
1522 | represented by variable-length sequences of one-byte codes. | |
1523 | ||
1524 | ASCII characters and control characters (e.g. `tab', `newline') are | |
1525 | represented by one-byte sequences which are their ASCII codes, in | |
1526 | the range 0x00 through 0x7F. | |
1527 | ||
1528 | 8-bit characters of the range 0x80..0x9F are represented by | |
1529 | two-byte sequences of LEADING_CODE_8_BIT_CONTROL and (their 8-bit | |
1530 | code + 0x20). | |
1531 | ||
1532 | 8-bit characters of the range 0xA0..0xFF are represented by | |
1533 | one-byte sequences which are their 8-bit code. | |
1534 | ||
1535 | The other characters are represented by a sequence of `base | |
1536 | leading-code', optional `extended leading-code', and one or two | |
1537 | `position-code's. The length of the sequence is determined by the | |
1538 | base leading-code. Leading-code takes the range 0x81 through 0x9D, | |
1539 | whereas extended leading-code and position-code take the range 0xA0 | |
1540 | through 0xFF. See `charset.h' for more details about leading-code | |
1541 | and position-code. | |
1542 | ||
1543 | --- CODE RANGE of Emacs' internal format --- | |
1544 | character set range | |
1545 | ------------- ----- | |
1546 | ascii 0x00..0x7F | |
1547 | eight-bit-control LEADING_CODE_8_BIT_CONTROL + 0xA0..0xBF | |
1548 | eight-bit-graphic 0xA0..0xBF | |
1549 | ELSE 0x81..0x9D + [0xA0..0xFF]+ | |
1550 | --------------------------------------------- | |
1551 | ||
1552 | As this is the internal character representation, the format is | |
1553 | usually not used externally (i.e. in a file or in a data sent to a | |
1554 | process). But, it is possible to have a text externally in this | |
1555 | format (i.e. by encoding by the coding system `emacs-mule'). | |
1556 | ||
1557 | In that case, a sequence of one-byte codes has a slightly different | |
1558 | form. | |
1559 | ||
1560 | At first, all characters in eight-bit-control are represented by | |
1561 | one-byte sequences which are their 8-bit code. | |
1562 | ||
1563 | Next, character composition data are represented by the byte | |
1564 | sequence of the form: 0x80 METHOD BYTES CHARS COMPONENT ..., | |
1565 | where, | |
1566 | METHOD is 0xF0 plus one of composition method (enum | |
1567 | composition_method), | |
1568 | ||
1569 | BYTES is 0xA0 plus a byte length of this composition data, | |
1570 | ||
1571 | CHARS is 0x20 plus a number of characters composed by this | |
1572 | data, | |
1573 | ||
1574 | COMPONENTs are characters of multibye form or composition | |
1575 | rules encoded by two-byte of ASCII codes. | |
1576 | ||
1577 | In addition, for backward compatibility, the following formats are | |
1578 | also recognized as composition data on decoding. | |
1579 | ||
1580 | 0x80 MSEQ ... | |
1581 | 0x80 0xFF MSEQ RULE MSEQ RULE ... MSEQ | |
1582 | ||
1583 | Here, | |
1584 | MSEQ is a multibyte form but in these special format: | |
1585 | ASCII: 0xA0 ASCII_CODE+0x80, | |
1586 | other: LEADING_CODE+0x20 FOLLOWING-BYTE ..., | |
1587 | RULE is a one byte code of the range 0xA0..0xF0 that | |
1588 | represents a composition rule. | |
1589 | */ | |
1590 | ||
1591 | char emacs_mule_bytes[256]; | |
1592 | ||
df7492f9 | 1593 | int |
ff0dacd7 | 1594 | emacs_mule_char (coding, src, nbytes, nchars, id) |
df7492f9 | 1595 | struct coding_system *coding; |
781d7a48 | 1596 | unsigned char *src; |
ff0dacd7 | 1597 | int *nbytes, *nchars, *id; |
df7492f9 | 1598 | { |
8f924df7 KH |
1599 | const unsigned char *src_end = coding->source + coding->src_bytes; |
1600 | const unsigned char *src_base = src; | |
df7492f9 | 1601 | int multibytep = coding->src_multibyte; |
df7492f9 KH |
1602 | struct charset *charset; |
1603 | unsigned code; | |
1604 | int c; | |
1605 | int consumed_chars = 0; | |
1606 | ||
1607 | ONE_MORE_BYTE (c); | |
df7492f9 KH |
1608 | switch (emacs_mule_bytes[c]) |
1609 | { | |
1610 | case 2: | |
1611 | if (! (charset = emacs_mule_charset[c])) | |
1612 | goto invalid_code; | |
1613 | ONE_MORE_BYTE (c); | |
1614 | code = c & 0x7F; | |
1615 | break; | |
1616 | ||
1617 | case 3: | |
7c78e542 KH |
1618 | if (c == EMACS_MULE_LEADING_CODE_PRIVATE_11 |
1619 | || c == EMACS_MULE_LEADING_CODE_PRIVATE_12) | |
b73bfc1c | 1620 | { |
df7492f9 KH |
1621 | ONE_MORE_BYTE (c); |
1622 | if (! (charset = emacs_mule_charset[c])) | |
1623 | goto invalid_code; | |
1624 | ONE_MORE_BYTE (c); | |
1625 | code = c & 0x7F; | |
b73bfc1c KH |
1626 | } |
1627 | else | |
1628 | { | |
df7492f9 KH |
1629 | if (! (charset = emacs_mule_charset[c])) |
1630 | goto invalid_code; | |
1631 | ONE_MORE_BYTE (c); | |
781d7a48 | 1632 | code = (c & 0x7F) << 8; |
df7492f9 KH |
1633 | ONE_MORE_BYTE (c); |
1634 | code |= c & 0x7F; | |
1635 | } | |
1636 | break; | |
1637 | ||
1638 | case 4: | |
781d7a48 | 1639 | ONE_MORE_BYTE (c); |
df7492f9 KH |
1640 | if (! (charset = emacs_mule_charset[c])) |
1641 | goto invalid_code; | |
1642 | ONE_MORE_BYTE (c); | |
781d7a48 | 1643 | code = (c & 0x7F) << 8; |
df7492f9 KH |
1644 | ONE_MORE_BYTE (c); |
1645 | code |= c & 0x7F; | |
1646 | break; | |
1647 | ||
1648 | case 1: | |
1649 | code = c; | |
9d123124 KH |
1650 | charset = CHARSET_FROM_ID (ASCII_BYTE_P (code) |
1651 | ? charset_ascii : charset_eight_bit); | |
df7492f9 KH |
1652 | break; |
1653 | ||
1654 | default: | |
1655 | abort (); | |
1656 | } | |
1657 | c = DECODE_CHAR (charset, code); | |
1658 | if (c < 0) | |
1659 | goto invalid_code; | |
1660 | *nbytes = src - src_base; | |
1661 | *nchars = consumed_chars; | |
ff0dacd7 KH |
1662 | if (id) |
1663 | *id = charset->id; | |
df7492f9 KH |
1664 | return c; |
1665 | ||
1666 | no_more_source: | |
1667 | return -2; | |
1668 | ||
1669 | invalid_code: | |
1670 | return -1; | |
1671 | } | |
1672 | ||
1673 | ||
1674 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
ff0dacd7 KH |
1675 | Check if a text is encoded in `emacs-mule'. If it is, return 1, |
1676 | else return 0. */ | |
df7492f9 KH |
1677 | |
1678 | static int | |
ff0dacd7 | 1679 | detect_coding_emacs_mule (coding, detect_info) |
df7492f9 | 1680 | struct coding_system *coding; |
ff0dacd7 | 1681 | struct coding_detection_info *detect_info; |
df7492f9 | 1682 | { |
8f924df7 KH |
1683 | const unsigned char *src = coding->source, *src_base = src; |
1684 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
df7492f9 KH |
1685 | int multibytep = coding->src_multibyte; |
1686 | int consumed_chars = 0; | |
1687 | int c; | |
1688 | int found = 0; | |
89528eb3 | 1689 | int incomplete; |
df7492f9 | 1690 | |
ff0dacd7 | 1691 | detect_info->checked |= CATEGORY_MASK_EMACS_MULE; |
df7492f9 KH |
1692 | /* A coding system of this category is always ASCII compatible. */ |
1693 | src += coding->head_ascii; | |
1694 | ||
1695 | while (1) | |
1696 | { | |
89528eb3 | 1697 | incomplete = 0; |
df7492f9 | 1698 | ONE_MORE_BYTE (c); |
89528eb3 | 1699 | incomplete = 1; |
df7492f9 KH |
1700 | |
1701 | if (c == 0x80) | |
1702 | { | |
1703 | /* Perhaps the start of composite character. We simple skip | |
1704 | it because analyzing it is too heavy for detecting. But, | |
1705 | at least, we check that the composite character | |
1706 | constitues of more than 4 bytes. */ | |
8f924df7 | 1707 | const unsigned char *src_base; |
df7492f9 KH |
1708 | |
1709 | repeat: | |
1710 | src_base = src; | |
1711 | do | |
1712 | { | |
1713 | ONE_MORE_BYTE (c); | |
1714 | } | |
1715 | while (c >= 0xA0); | |
1716 | ||
1717 | if (src - src_base <= 4) | |
1718 | break; | |
ff0dacd7 | 1719 | found = CATEGORY_MASK_EMACS_MULE; |
df7492f9 KH |
1720 | if (c == 0x80) |
1721 | goto repeat; | |
b73bfc1c | 1722 | } |
df7492f9 KH |
1723 | |
1724 | if (c < 0x80) | |
b73bfc1c | 1725 | { |
df7492f9 KH |
1726 | if (c < 0x20 |
1727 | && (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)) | |
1728 | break; | |
1729 | } | |
1730 | else | |
1731 | { | |
8f924df7 | 1732 | const unsigned char *src_base = src - 1; |
df7492f9 KH |
1733 | |
1734 | do | |
1735 | { | |
1736 | ONE_MORE_BYTE (c); | |
1737 | } | |
1738 | while (c >= 0xA0); | |
1739 | if (src - src_base != emacs_mule_bytes[*src_base]) | |
1740 | break; | |
ff0dacd7 | 1741 | found = CATEGORY_MASK_EMACS_MULE; |
4ed46869 KH |
1742 | } |
1743 | } | |
ff0dacd7 | 1744 | detect_info->rejected |= CATEGORY_MASK_EMACS_MULE; |
df7492f9 KH |
1745 | return 0; |
1746 | ||
1747 | no_more_source: | |
89528eb3 KH |
1748 | if (incomplete && coding->mode & CODING_MODE_LAST_BLOCK) |
1749 | { | |
ff0dacd7 | 1750 | detect_info->rejected |= CATEGORY_MASK_EMACS_MULE; |
89528eb3 KH |
1751 | return 0; |
1752 | } | |
ff0dacd7 KH |
1753 | detect_info->found |= found; |
1754 | return 1; | |
4ed46869 KH |
1755 | } |
1756 | ||
b73bfc1c | 1757 | |
df7492f9 KH |
1758 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
1759 | ||
1760 | /* Decode a character represented as a component of composition | |
1761 | sequence of Emacs 20/21 style at SRC. Set C to that character and | |
1762 | update SRC to the head of next character (or an encoded composition | |
1763 | rule). If SRC doesn't points a composition component, set C to -1. | |
1764 | If SRC points an invalid byte sequence, global exit by a return | |
1765 | value 0. */ | |
1766 | ||
1767 | #define DECODE_EMACS_MULE_COMPOSITION_CHAR(buf) \ | |
1768 | if (1) \ | |
1769 | { \ | |
1770 | int c; \ | |
1771 | int nbytes, nchars; \ | |
1772 | \ | |
1773 | if (src == src_end) \ | |
1774 | break; \ | |
ff0dacd7 | 1775 | c = emacs_mule_char (coding, src, &nbytes, &nchars, NULL);\ |
df7492f9 KH |
1776 | if (c < 0) \ |
1777 | { \ | |
1778 | if (c == -2) \ | |
1779 | break; \ | |
1780 | goto invalid_code; \ | |
1781 | } \ | |
1782 | *buf++ = c; \ | |
1783 | src += nbytes; \ | |
1784 | consumed_chars += nchars; \ | |
1785 | } \ | |
1786 | else | |
1787 | ||
1788 | ||
1789 | /* Decode a composition rule represented as a component of composition | |
781d7a48 KH |
1790 | sequence of Emacs 20 style at SRC. Store the decoded rule in *BUF, |
1791 | and increment BUF. If SRC points an invalid byte sequence, set C | |
1792 | to -1. */ | |
df7492f9 | 1793 | |
781d7a48 | 1794 | #define DECODE_EMACS_MULE_COMPOSITION_RULE_20(buf) \ |
df7492f9 KH |
1795 | do { \ |
1796 | int c, gref, nref; \ | |
1797 | \ | |
781d7a48 | 1798 | if (src >= src_end) \ |
df7492f9 KH |
1799 | goto invalid_code; \ |
1800 | ONE_MORE_BYTE_NO_CHECK (c); \ | |
781d7a48 | 1801 | c -= 0x20; \ |
df7492f9 KH |
1802 | if (c < 0 || c >= 81) \ |
1803 | goto invalid_code; \ | |
1804 | \ | |
1805 | gref = c / 9, nref = c % 9; \ | |
1806 | *buf++ = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
1807 | } while (0) | |
1808 | ||
1809 | ||
781d7a48 KH |
1810 | /* Decode a composition rule represented as a component of composition |
1811 | sequence of Emacs 21 style at SRC. Store the decoded rule in *BUF, | |
1812 | and increment BUF. If SRC points an invalid byte sequence, set C | |
1813 | to -1. */ | |
1814 | ||
1815 | #define DECODE_EMACS_MULE_COMPOSITION_RULE_21(buf) \ | |
1816 | do { \ | |
1817 | int gref, nref; \ | |
1818 | \ | |
1819 | if (src + 1>= src_end) \ | |
1820 | goto invalid_code; \ | |
1821 | ONE_MORE_BYTE_NO_CHECK (gref); \ | |
1822 | gref -= 0x20; \ | |
1823 | ONE_MORE_BYTE_NO_CHECK (nref); \ | |
1824 | nref -= 0x20; \ | |
1825 | if (gref < 0 || gref >= 81 \ | |
1826 | || nref < 0 || nref >= 81) \ | |
1827 | goto invalid_code; \ | |
1828 | *buf++ = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
1829 | } while (0) | |
1830 | ||
1831 | ||
df7492f9 | 1832 | #define DECODE_EMACS_MULE_21_COMPOSITION(c) \ |
aa72b389 | 1833 | do { \ |
df7492f9 | 1834 | /* Emacs 21 style format. The first three bytes at SRC are \ |
781d7a48 | 1835 | (METHOD - 0xF2), (BYTES - 0xA0), (CHARS - 0xA0), where BYTES is \ |
df7492f9 KH |
1836 | the byte length of this composition information, CHARS is the \ |
1837 | number of characters composed by this composition. */ \ | |
781d7a48 KH |
1838 | enum composition_method method = c - 0xF2; \ |
1839 | int *charbuf_base = charbuf; \ | |
ff0dacd7 | 1840 | int from, to; \ |
df7492f9 KH |
1841 | int consumed_chars_limit; \ |
1842 | int nbytes, nchars; \ | |
1843 | \ | |
1844 | ONE_MORE_BYTE (c); \ | |
1845 | nbytes = c - 0xA0; \ | |
1846 | if (nbytes < 3) \ | |
1847 | goto invalid_code; \ | |
1848 | ONE_MORE_BYTE (c); \ | |
1849 | nchars = c - 0xA0; \ | |
ff0dacd7 KH |
1850 | from = coding->produced + char_offset; \ |
1851 | to = from + nchars; \ | |
1852 | ADD_COMPOSITION_DATA (charbuf, from, to, method); \ | |
df7492f9 KH |
1853 | consumed_chars_limit = consumed_chars_base + nbytes; \ |
1854 | if (method != COMPOSITION_RELATIVE) \ | |
aa72b389 | 1855 | { \ |
df7492f9 KH |
1856 | int i = 0; \ |
1857 | while (consumed_chars < consumed_chars_limit) \ | |
aa72b389 | 1858 | { \ |
df7492f9 | 1859 | if (i % 2 && method != COMPOSITION_WITH_ALTCHARS) \ |
781d7a48 | 1860 | DECODE_EMACS_MULE_COMPOSITION_RULE_21 (charbuf); \ |
df7492f9 KH |
1861 | else \ |
1862 | DECODE_EMACS_MULE_COMPOSITION_CHAR (charbuf); \ | |
781d7a48 | 1863 | i++; \ |
aa72b389 | 1864 | } \ |
df7492f9 KH |
1865 | if (consumed_chars < consumed_chars_limit) \ |
1866 | goto invalid_code; \ | |
781d7a48 | 1867 | charbuf_base[0] -= i; \ |
aa72b389 KH |
1868 | } \ |
1869 | } while (0) | |
93dec019 | 1870 | |
aa72b389 | 1871 | |
df7492f9 KH |
1872 | #define DECODE_EMACS_MULE_20_RELATIVE_COMPOSITION(c) \ |
1873 | do { \ | |
1874 | /* Emacs 20 style format for relative composition. */ \ | |
1875 | /* Store multibyte form of characters to be composed. */ \ | |
ff0dacd7 | 1876 | enum composition_method method = COMPOSITION_RELATIVE; \ |
df7492f9 KH |
1877 | int components[MAX_COMPOSITION_COMPONENTS * 2 - 1]; \ |
1878 | int *buf = components; \ | |
1879 | int i, j; \ | |
ff0dacd7 | 1880 | int from, to; \ |
df7492f9 KH |
1881 | \ |
1882 | src = src_base; \ | |
1883 | ONE_MORE_BYTE (c); /* skip 0x80 */ \ | |
1884 | for (i = 0; i < MAX_COMPOSITION_COMPONENTS; i++) \ | |
1885 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ | |
1886 | if (i < 2) \ | |
1887 | goto invalid_code; \ | |
ff0dacd7 KH |
1888 | from = coding->produced_char + char_offset; \ |
1889 | to = from + i; \ | |
1890 | ADD_COMPOSITION_DATA (charbuf, from, to, method); \ | |
df7492f9 KH |
1891 | for (j = 0; j < i; j++) \ |
1892 | *charbuf++ = components[j]; \ | |
1893 | } while (0) | |
1894 | ||
1895 | ||
1896 | #define DECODE_EMACS_MULE_20_RULEBASE_COMPOSITION(c) \ | |
1897 | do { \ | |
1898 | /* Emacs 20 style format for rule-base composition. */ \ | |
1899 | /* Store multibyte form of characters to be composed. */ \ | |
ff0dacd7 | 1900 | enum composition_method method = COMPOSITION_WITH_RULE; \ |
df7492f9 KH |
1901 | int components[MAX_COMPOSITION_COMPONENTS * 2 - 1]; \ |
1902 | int *buf = components; \ | |
1903 | int i, j; \ | |
ff0dacd7 | 1904 | int from, to; \ |
df7492f9 KH |
1905 | \ |
1906 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ | |
1907 | for (i = 0; i < MAX_COMPOSITION_COMPONENTS; i++) \ | |
1908 | { \ | |
781d7a48 | 1909 | DECODE_EMACS_MULE_COMPOSITION_RULE_20 (buf); \ |
df7492f9 KH |
1910 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ |
1911 | } \ | |
1912 | if (i < 1 || (buf - components) % 2 == 0) \ | |
1913 | goto invalid_code; \ | |
1914 | if (charbuf + i + (i / 2) + 1 < charbuf_end) \ | |
1915 | goto no_more_source; \ | |
ff0dacd7 KH |
1916 | from = coding->produced_char + char_offset; \ |
1917 | to = from + i; \ | |
1918 | ADD_COMPOSITION_DATA (buf, from, to, method); \ | |
df7492f9 KH |
1919 | for (j = 0; j < i; j++) \ |
1920 | *charbuf++ = components[j]; \ | |
1921 | for (j = 0; j < i; j += 2) \ | |
1922 | *charbuf++ = components[j]; \ | |
1923 | } while (0) | |
1924 | ||
aa72b389 KH |
1925 | |
1926 | static void | |
df7492f9 | 1927 | decode_coding_emacs_mule (coding) |
aa72b389 | 1928 | struct coding_system *coding; |
aa72b389 | 1929 | { |
8f924df7 KH |
1930 | const unsigned char *src = coding->source + coding->consumed; |
1931 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
1932 | const unsigned char *src_base; | |
df7492f9 | 1933 | int *charbuf = coding->charbuf; |
ff0dacd7 | 1934 | int *charbuf_end = charbuf + coding->charbuf_size - MAX_ANNOTATION_LENGTH; |
df7492f9 | 1935 | int consumed_chars = 0, consumed_chars_base; |
df7492f9 KH |
1936 | int multibytep = coding->src_multibyte; |
1937 | Lisp_Object attrs, eol_type, charset_list; | |
ff0dacd7 KH |
1938 | int char_offset = coding->produced_char; |
1939 | int last_offset = char_offset; | |
1940 | int last_id = charset_ascii; | |
aa72b389 | 1941 | |
df7492f9 | 1942 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
aa72b389 | 1943 | |
aa72b389 KH |
1944 | while (1) |
1945 | { | |
df7492f9 KH |
1946 | int c; |
1947 | ||
aa72b389 | 1948 | src_base = src; |
df7492f9 KH |
1949 | consumed_chars_base = consumed_chars; |
1950 | ||
1951 | if (charbuf >= charbuf_end) | |
1952 | break; | |
aa72b389 | 1953 | |
df7492f9 KH |
1954 | ONE_MORE_BYTE (c); |
1955 | ||
1956 | if (c < 0x80) | |
aa72b389 | 1957 | { |
df7492f9 KH |
1958 | if (c == '\r') |
1959 | { | |
1960 | if (EQ (eol_type, Qdos)) | |
1961 | { | |
1962 | if (src == src_end) | |
98725083 KH |
1963 | { |
1964 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; | |
1965 | goto no_more_source; | |
1966 | } | |
df7492f9 KH |
1967 | if (*src == '\n') |
1968 | ONE_MORE_BYTE (c); | |
1969 | } | |
1970 | else if (EQ (eol_type, Qmac)) | |
1971 | c = '\n'; | |
1972 | } | |
1973 | *charbuf++ = c; | |
1974 | char_offset++; | |
aa72b389 | 1975 | } |
df7492f9 KH |
1976 | else if (c == 0x80) |
1977 | { | |
df7492f9 | 1978 | ONE_MORE_BYTE (c); |
781d7a48 KH |
1979 | if (c - 0xF2 >= COMPOSITION_RELATIVE |
1980 | && c - 0xF2 <= COMPOSITION_WITH_RULE_ALTCHARS) | |
df7492f9 KH |
1981 | DECODE_EMACS_MULE_21_COMPOSITION (c); |
1982 | else if (c < 0xC0) | |
1983 | DECODE_EMACS_MULE_20_RELATIVE_COMPOSITION (c); | |
1984 | else if (c == 0xFF) | |
1985 | DECODE_EMACS_MULE_20_RULEBASE_COMPOSITION (c); | |
1986 | else | |
1987 | goto invalid_code; | |
1988 | } | |
1989 | else if (c < 0xA0 && emacs_mule_bytes[c] > 1) | |
1990 | { | |
1991 | int nbytes, nchars; | |
ff0dacd7 KH |
1992 | int id; |
1993 | ||
781d7a48 KH |
1994 | src = src_base; |
1995 | consumed_chars = consumed_chars_base; | |
ff0dacd7 | 1996 | c = emacs_mule_char (coding, src, &nbytes, &nchars, &id); |
df7492f9 KH |
1997 | if (c < 0) |
1998 | { | |
1999 | if (c == -2) | |
2000 | break; | |
2001 | goto invalid_code; | |
2002 | } | |
ff0dacd7 KH |
2003 | if (last_id != id) |
2004 | { | |
2005 | if (last_id != charset_ascii) | |
2006 | ADD_CHARSET_DATA (charbuf, last_offset, char_offset, last_id); | |
2007 | last_id = id; | |
2008 | last_offset = char_offset; | |
2009 | } | |
df7492f9 | 2010 | *charbuf++ = c; |
781d7a48 KH |
2011 | src += nbytes; |
2012 | consumed_chars += nchars; | |
df7492f9 KH |
2013 | char_offset++; |
2014 | } | |
2015 | continue; | |
2016 | ||
2017 | invalid_code: | |
2018 | src = src_base; | |
2019 | consumed_chars = consumed_chars_base; | |
2020 | ONE_MORE_BYTE (c); | |
2021 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
ff0dacd7 | 2022 | char_offset++; |
df7492f9 KH |
2023 | coding->errors++; |
2024 | } | |
2025 | ||
2026 | no_more_source: | |
ff0dacd7 KH |
2027 | if (last_id != charset_ascii) |
2028 | ADD_CHARSET_DATA (charbuf, last_offset, char_offset, last_id); | |
df7492f9 KH |
2029 | coding->consumed_char += consumed_chars_base; |
2030 | coding->consumed = src_base - coding->source; | |
2031 | coding->charbuf_used = charbuf - coding->charbuf; | |
2032 | } | |
2033 | ||
2034 | ||
2035 | #define EMACS_MULE_LEADING_CODES(id, codes) \ | |
2036 | do { \ | |
2037 | if (id < 0xA0) \ | |
2038 | codes[0] = id, codes[1] = 0; \ | |
2039 | else if (id < 0xE0) \ | |
2040 | codes[0] = 0x9A, codes[1] = id; \ | |
2041 | else if (id < 0xF0) \ | |
2042 | codes[0] = 0x9B, codes[1] = id; \ | |
2043 | else if (id < 0xF5) \ | |
2044 | codes[0] = 0x9C, codes[1] = id; \ | |
2045 | else \ | |
2046 | codes[0] = 0x9D, codes[1] = id; \ | |
2047 | } while (0); | |
2048 | ||
aa72b389 | 2049 | |
df7492f9 KH |
2050 | static int |
2051 | encode_coding_emacs_mule (coding) | |
2052 | struct coding_system *coding; | |
2053 | { | |
2054 | int multibytep = coding->dst_multibyte; | |
2055 | int *charbuf = coding->charbuf; | |
2056 | int *charbuf_end = charbuf + coding->charbuf_used; | |
2057 | unsigned char *dst = coding->destination + coding->produced; | |
2058 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
2059 | int safe_room = 8; | |
df7492f9 KH |
2060 | int produced_chars = 0; |
2061 | Lisp_Object attrs, eol_type, charset_list; | |
2062 | int c; | |
ff0dacd7 | 2063 | int preferred_charset_id = -1; |
df7492f9 KH |
2064 | |
2065 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
2066 | ||
2067 | while (charbuf < charbuf_end) | |
2068 | { | |
2069 | ASSURE_DESTINATION (safe_room); | |
2070 | c = *charbuf++; | |
ff0dacd7 KH |
2071 | |
2072 | if (c < 0) | |
2073 | { | |
2074 | /* Handle an annotation. */ | |
2075 | switch (*charbuf) | |
2076 | { | |
2077 | case CODING_ANNOTATE_COMPOSITION_MASK: | |
2078 | /* Not yet implemented. */ | |
2079 | break; | |
2080 | case CODING_ANNOTATE_CHARSET_MASK: | |
2081 | preferred_charset_id = charbuf[3]; | |
2082 | if (preferred_charset_id >= 0 | |
2083 | && NILP (Fmemq (make_number (preferred_charset_id), | |
2084 | charset_list))) | |
2085 | preferred_charset_id = -1; | |
2086 | break; | |
2087 | default: | |
2088 | abort (); | |
2089 | } | |
2090 | charbuf += -c - 1; | |
2091 | continue; | |
2092 | } | |
2093 | ||
df7492f9 KH |
2094 | if (ASCII_CHAR_P (c)) |
2095 | EMIT_ONE_ASCII_BYTE (c); | |
16eafb5d KH |
2096 | else if (CHAR_BYTE8_P (c)) |
2097 | { | |
2098 | c = CHAR_TO_BYTE8 (c); | |
2099 | EMIT_ONE_BYTE (c); | |
2100 | } | |
df7492f9 | 2101 | else |
aa72b389 | 2102 | { |
df7492f9 KH |
2103 | struct charset *charset; |
2104 | unsigned code; | |
2105 | int dimension; | |
2106 | int emacs_mule_id; | |
2107 | unsigned char leading_codes[2]; | |
2108 | ||
ff0dacd7 KH |
2109 | if (preferred_charset_id >= 0) |
2110 | { | |
2111 | charset = CHARSET_FROM_ID (preferred_charset_id); | |
2112 | if (! CHAR_CHARSET_P (c, charset)) | |
2113 | charset = char_charset (c, charset_list, NULL); | |
2114 | } | |
2115 | else | |
2116 | charset = char_charset (c, charset_list, &code); | |
df7492f9 KH |
2117 | if (! charset) |
2118 | { | |
2119 | c = coding->default_char; | |
2120 | if (ASCII_CHAR_P (c)) | |
2121 | { | |
2122 | EMIT_ONE_ASCII_BYTE (c); | |
2123 | continue; | |
2124 | } | |
2125 | charset = char_charset (c, charset_list, &code); | |
2126 | } | |
2127 | dimension = CHARSET_DIMENSION (charset); | |
2128 | emacs_mule_id = CHARSET_EMACS_MULE_ID (charset); | |
2129 | EMACS_MULE_LEADING_CODES (emacs_mule_id, leading_codes); | |
2130 | EMIT_ONE_BYTE (leading_codes[0]); | |
2131 | if (leading_codes[1]) | |
2132 | EMIT_ONE_BYTE (leading_codes[1]); | |
2133 | if (dimension == 1) | |
2134 | EMIT_ONE_BYTE (code); | |
aa72b389 | 2135 | else |
df7492f9 KH |
2136 | { |
2137 | EMIT_ONE_BYTE (code >> 8); | |
2138 | EMIT_ONE_BYTE (code & 0xFF); | |
2139 | } | |
aa72b389 | 2140 | } |
aa72b389 | 2141 | } |
df7492f9 KH |
2142 | coding->result = CODING_RESULT_SUCCESS; |
2143 | coding->produced_char += produced_chars; | |
2144 | coding->produced = dst - coding->destination; | |
2145 | return 0; | |
aa72b389 | 2146 | } |
b73bfc1c | 2147 | |
4ed46869 | 2148 | \f |
df7492f9 | 2149 | /*** 7. ISO2022 handlers ***/ |
4ed46869 KH |
2150 | |
2151 | /* The following note describes the coding system ISO2022 briefly. | |
39787efd | 2152 | Since the intention of this note is to help understand the |
5a936b46 | 2153 | functions in this file, some parts are NOT ACCURATE or are OVERLY |
39787efd | 2154 | SIMPLIFIED. For thorough understanding, please refer to the |
5a936b46 | 2155 | original document of ISO2022. This is equivalent to the standard |
cfb43547 | 2156 | ECMA-35, obtainable from <URL:http://www.ecma.ch/> (*). |
4ed46869 KH |
2157 | |
2158 | ISO2022 provides many mechanisms to encode several character sets | |
cfb43547 | 2159 | in 7-bit and 8-bit environments. For 7-bit environments, all text |
39787efd KH |
2160 | is encoded using bytes less than 128. This may make the encoded |
2161 | text a little bit longer, but the text passes more easily through | |
cfb43547 | 2162 | several types of gateway, some of which strip off the MSB (Most |
8ca3766a | 2163 | Significant Bit). |
b73bfc1c | 2164 | |
cfb43547 DL |
2165 | There are two kinds of character sets: control character sets and |
2166 | graphic character sets. The former contain control characters such | |
4ed46869 | 2167 | as `newline' and `escape' to provide control functions (control |
39787efd | 2168 | functions are also provided by escape sequences). The latter |
cfb43547 | 2169 | contain graphic characters such as 'A' and '-'. Emacs recognizes |
4ed46869 KH |
2170 | two control character sets and many graphic character sets. |
2171 | ||
2172 | Graphic character sets are classified into one of the following | |
39787efd KH |
2173 | four classes, according to the number of bytes (DIMENSION) and |
2174 | number of characters in one dimension (CHARS) of the set: | |
2175 | - DIMENSION1_CHARS94 | |
2176 | - DIMENSION1_CHARS96 | |
2177 | - DIMENSION2_CHARS94 | |
2178 | - DIMENSION2_CHARS96 | |
2179 | ||
2180 | In addition, each character set is assigned an identification tag, | |
cfb43547 | 2181 | unique for each set, called the "final character" (denoted as <F> |
39787efd KH |
2182 | hereafter). The <F> of each character set is decided by ECMA(*) |
2183 | when it is registered in ISO. The code range of <F> is 0x30..0x7F | |
2184 | (0x30..0x3F are for private use only). | |
4ed46869 KH |
2185 | |
2186 | Note (*): ECMA = European Computer Manufacturers Association | |
2187 | ||
cfb43547 | 2188 | Here are examples of graphic character sets [NAME(<F>)]: |
4ed46869 KH |
2189 | o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ... |
2190 | o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ... | |
2191 | o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ... | |
2192 | o DIMENSION2_CHARS96 -- none for the moment | |
2193 | ||
39787efd | 2194 | A code area (1 byte=8 bits) is divided into 4 areas, C0, GL, C1, and GR. |
4ed46869 KH |
2195 | C0 [0x00..0x1F] -- control character plane 0 |
2196 | GL [0x20..0x7F] -- graphic character plane 0 | |
2197 | C1 [0x80..0x9F] -- control character plane 1 | |
2198 | GR [0xA0..0xFF] -- graphic character plane 1 | |
2199 | ||
2200 | A control character set is directly designated and invoked to C0 or | |
39787efd KH |
2201 | C1 by an escape sequence. The most common case is that: |
2202 | - ISO646's control character set is designated/invoked to C0, and | |
2203 | - ISO6429's control character set is designated/invoked to C1, | |
2204 | and usually these designations/invocations are omitted in encoded | |
2205 | text. In a 7-bit environment, only C0 can be used, and a control | |
2206 | character for C1 is encoded by an appropriate escape sequence to | |
2207 | fit into the environment. All control characters for C1 are | |
2208 | defined to have corresponding escape sequences. | |
4ed46869 KH |
2209 | |
2210 | A graphic character set is at first designated to one of four | |
2211 | graphic registers (G0 through G3), then these graphic registers are | |
2212 | invoked to GL or GR. These designations and invocations can be | |
2213 | done independently. The most common case is that G0 is invoked to | |
39787efd KH |
2214 | GL, G1 is invoked to GR, and ASCII is designated to G0. Usually |
2215 | these invocations and designations are omitted in encoded text. | |
2216 | In a 7-bit environment, only GL can be used. | |
4ed46869 | 2217 | |
39787efd KH |
2218 | When a graphic character set of CHARS94 is invoked to GL, codes |
2219 | 0x20 and 0x7F of the GL area work as control characters SPACE and | |
2220 | DEL respectively, and codes 0xA0 and 0xFF of the GR area should not | |
2221 | be used. | |
4ed46869 KH |
2222 | |
2223 | There are two ways of invocation: locking-shift and single-shift. | |
2224 | With locking-shift, the invocation lasts until the next different | |
39787efd KH |
2225 | invocation, whereas with single-shift, the invocation affects the |
2226 | following character only and doesn't affect the locking-shift | |
2227 | state. Invocations are done by the following control characters or | |
2228 | escape sequences: | |
4ed46869 KH |
2229 | |
2230 | ---------------------------------------------------------------------- | |
39787efd | 2231 | abbrev function cntrl escape seq description |
4ed46869 | 2232 | ---------------------------------------------------------------------- |
39787efd KH |
2233 | SI/LS0 (shift-in) 0x0F none invoke G0 into GL |
2234 | SO/LS1 (shift-out) 0x0E none invoke G1 into GL | |
2235 | LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL | |
2236 | LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL | |
2237 | LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*) | |
2238 | LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*) | |
2239 | LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*) | |
2240 | SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char | |
2241 | SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char | |
4ed46869 | 2242 | ---------------------------------------------------------------------- |
39787efd KH |
2243 | (*) These are not used by any known coding system. |
2244 | ||
2245 | Control characters for these functions are defined by macros | |
2246 | ISO_CODE_XXX in `coding.h'. | |
4ed46869 | 2247 | |
39787efd | 2248 | Designations are done by the following escape sequences: |
4ed46869 KH |
2249 | ---------------------------------------------------------------------- |
2250 | escape sequence description | |
2251 | ---------------------------------------------------------------------- | |
2252 | ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0 | |
2253 | ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1 | |
2254 | ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2 | |
2255 | ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3 | |
2256 | ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*) | |
2257 | ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1 | |
2258 | ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2 | |
2259 | ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3 | |
2260 | ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**) | |
2261 | ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1 | |
2262 | ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2 | |
2263 | ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3 | |
2264 | ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*) | |
2265 | ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1 | |
2266 | ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2 | |
2267 | ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3 | |
2268 | ---------------------------------------------------------------------- | |
2269 | ||
2270 | In this list, "DIMENSION1_CHARS94<F>" means a graphic character set | |
39787efd | 2271 | of dimension 1, chars 94, and final character <F>, etc... |
4ed46869 KH |
2272 | |
2273 | Note (*): Although these designations are not allowed in ISO2022, | |
2274 | Emacs accepts them on decoding, and produces them on encoding | |
39787efd | 2275 | CHARS96 character sets in a coding system which is characterized as |
4ed46869 KH |
2276 | 7-bit environment, non-locking-shift, and non-single-shift. |
2277 | ||
2278 | Note (**): If <F> is '@', 'A', or 'B', the intermediate character | |
df7492f9 | 2279 | '(' must be omitted. We refer to this as "short-form" hereafter. |
4ed46869 | 2280 | |
cfb43547 | 2281 | Now you may notice that there are a lot of ways of encoding the |
39787efd KH |
2282 | same multilingual text in ISO2022. Actually, there exist many |
2283 | coding systems such as Compound Text (used in X11's inter client | |
8ca3766a DL |
2284 | communication, ISO-2022-JP (used in Japanese Internet), ISO-2022-KR |
2285 | (used in Korean Internet), EUC (Extended UNIX Code, used in Asian | |
4ed46869 KH |
2286 | localized platforms), and all of these are variants of ISO2022. |
2287 | ||
2288 | In addition to the above, Emacs handles two more kinds of escape | |
2289 | sequences: ISO6429's direction specification and Emacs' private | |
2290 | sequence for specifying character composition. | |
2291 | ||
39787efd | 2292 | ISO6429's direction specification takes the following form: |
4ed46869 KH |
2293 | o CSI ']' -- end of the current direction |
2294 | o CSI '0' ']' -- end of the current direction | |
2295 | o CSI '1' ']' -- start of left-to-right text | |
2296 | o CSI '2' ']' -- start of right-to-left text | |
2297 | The control character CSI (0x9B: control sequence introducer) is | |
39787efd KH |
2298 | abbreviated to the escape sequence ESC '[' in a 7-bit environment. |
2299 | ||
2300 | Character composition specification takes the following form: | |
ec6d2bb8 KH |
2301 | o ESC '0' -- start relative composition |
2302 | o ESC '1' -- end composition | |
2303 | o ESC '2' -- start rule-base composition (*) | |
2304 | o ESC '3' -- start relative composition with alternate chars (**) | |
2305 | o ESC '4' -- start rule-base composition with alternate chars (**) | |
b73bfc1c | 2306 | Since these are not standard escape sequences of any ISO standard, |
cfb43547 | 2307 | the use of them with these meanings is restricted to Emacs only. |
ec6d2bb8 | 2308 | |
5a936b46 DL |
2309 | (*) This form is used only in Emacs 20.7 and older versions, |
2310 | but newer versions can safely decode it. | |
cfb43547 | 2311 | (**) This form is used only in Emacs 21.1 and newer versions, |
5a936b46 | 2312 | and older versions can't decode it. |
ec6d2bb8 | 2313 | |
cfb43547 | 2314 | Here's a list of example usages of these composition escape |
b73bfc1c | 2315 | sequences (categorized by `enum composition_method'). |
ec6d2bb8 | 2316 | |
b73bfc1c | 2317 | COMPOSITION_RELATIVE: |
ec6d2bb8 | 2318 | ESC 0 CHAR [ CHAR ] ESC 1 |
8ca3766a | 2319 | COMPOSITION_WITH_RULE: |
ec6d2bb8 | 2320 | ESC 2 CHAR [ RULE CHAR ] ESC 1 |
b73bfc1c | 2321 | COMPOSITION_WITH_ALTCHARS: |
ec6d2bb8 | 2322 | ESC 3 ALTCHAR [ ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 |
b73bfc1c | 2323 | COMPOSITION_WITH_RULE_ALTCHARS: |
ec6d2bb8 | 2324 | ESC 4 ALTCHAR [ RULE ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 */ |
4ed46869 KH |
2325 | |
2326 | enum iso_code_class_type iso_code_class[256]; | |
2327 | ||
df7492f9 KH |
2328 | #define SAFE_CHARSET_P(coding, id) \ |
2329 | ((id) <= (coding)->max_charset_id \ | |
2330 | && (coding)->safe_charsets[id] >= 0) | |
2331 | ||
2332 | ||
2333 | #define SHIFT_OUT_OK(category) \ | |
2334 | (CODING_ISO_INITIAL (&coding_categories[category], 1) >= 0) | |
2335 | ||
2336 | static void | |
f0064e1f DL |
2337 | setup_iso_safe_charsets (attrs) |
2338 | Lisp_Object attrs; | |
df7492f9 KH |
2339 | { |
2340 | Lisp_Object charset_list, safe_charsets; | |
2341 | Lisp_Object request; | |
2342 | Lisp_Object reg_usage; | |
2343 | Lisp_Object tail; | |
2344 | int reg94, reg96; | |
2345 | int flags = XINT (AREF (attrs, coding_attr_iso_flags)); | |
2346 | int max_charset_id; | |
2347 | ||
2348 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
2349 | if ((flags & CODING_ISO_FLAG_FULL_SUPPORT) | |
2350 | && ! EQ (charset_list, Viso_2022_charset_list)) | |
2351 | { | |
2352 | CODING_ATTR_CHARSET_LIST (attrs) | |
2353 | = charset_list = Viso_2022_charset_list; | |
2354 | ASET (attrs, coding_attr_safe_charsets, Qnil); | |
2355 | } | |
2356 | ||
2357 | if (STRINGP (AREF (attrs, coding_attr_safe_charsets))) | |
2358 | return; | |
2359 | ||
2360 | max_charset_id = 0; | |
2361 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
2362 | { | |
2363 | int id = XINT (XCAR (tail)); | |
2364 | if (max_charset_id < id) | |
2365 | max_charset_id = id; | |
2366 | } | |
d46c5b12 | 2367 | |
df7492f9 KH |
2368 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), |
2369 | make_number (255)); | |
2370 | request = AREF (attrs, coding_attr_iso_request); | |
2371 | reg_usage = AREF (attrs, coding_attr_iso_usage); | |
2372 | reg94 = XINT (XCAR (reg_usage)); | |
2373 | reg96 = XINT (XCDR (reg_usage)); | |
2374 | ||
2375 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
2376 | { | |
2377 | Lisp_Object id; | |
2378 | Lisp_Object reg; | |
2379 | struct charset *charset; | |
2380 | ||
2381 | id = XCAR (tail); | |
2382 | charset = CHARSET_FROM_ID (XINT (id)); | |
bf16eb23 | 2383 | reg = Fcdr (Fassq (id, request)); |
df7492f9 | 2384 | if (! NILP (reg)) |
8f924df7 | 2385 | SSET (safe_charsets, XINT (id), XINT (reg)); |
df7492f9 KH |
2386 | else if (charset->iso_chars_96) |
2387 | { | |
2388 | if (reg96 < 4) | |
8f924df7 | 2389 | SSET (safe_charsets, XINT (id), reg96); |
df7492f9 KH |
2390 | } |
2391 | else | |
2392 | { | |
2393 | if (reg94 < 4) | |
8f924df7 | 2394 | SSET (safe_charsets, XINT (id), reg94); |
df7492f9 KH |
2395 | } |
2396 | } | |
2397 | ASET (attrs, coding_attr_safe_charsets, safe_charsets); | |
2398 | } | |
d46c5b12 | 2399 | |
b6871cc7 | 2400 | |
4ed46869 | 2401 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
ff0dacd7 KH |
2402 | Check if a text is encoded in one of ISO-2022 based codig systems. |
2403 | If it is, return 1, else return 0. */ | |
4ed46869 | 2404 | |
0a28aafb | 2405 | static int |
ff0dacd7 | 2406 | detect_coding_iso_2022 (coding, detect_info) |
df7492f9 | 2407 | struct coding_system *coding; |
ff0dacd7 | 2408 | struct coding_detection_info *detect_info; |
4ed46869 | 2409 | { |
8f924df7 KH |
2410 | const unsigned char *src = coding->source, *src_base = src; |
2411 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
df7492f9 | 2412 | int multibytep = coding->src_multibyte; |
ff0dacd7 | 2413 | int single_shifting = 0; |
df7492f9 KH |
2414 | int id; |
2415 | int c, c1; | |
2416 | int consumed_chars = 0; | |
2417 | int i; | |
ff0dacd7 KH |
2418 | int rejected = 0; |
2419 | int found = 0; | |
2420 | ||
2421 | detect_info->checked |= CATEGORY_MASK_ISO; | |
df7492f9 KH |
2422 | |
2423 | for (i = coding_category_iso_7; i <= coding_category_iso_8_else; i++) | |
2424 | { | |
2425 | struct coding_system *this = &(coding_categories[i]); | |
2426 | Lisp_Object attrs, val; | |
2427 | ||
2428 | attrs = CODING_ID_ATTRS (this->id); | |
2429 | if (CODING_ISO_FLAGS (this) & CODING_ISO_FLAG_FULL_SUPPORT | |
2430 | && ! EQ (CODING_ATTR_SAFE_CHARSETS (attrs), Viso_2022_charset_list)) | |
2431 | setup_iso_safe_charsets (attrs); | |
2432 | val = CODING_ATTR_SAFE_CHARSETS (attrs); | |
8f924df7 KH |
2433 | this->max_charset_id = SCHARS (val) - 1; |
2434 | this->safe_charsets = (char *) SDATA (val); | |
df7492f9 KH |
2435 | } |
2436 | ||
2437 | /* A coding system of this category is always ASCII compatible. */ | |
2438 | src += coding->head_ascii; | |
3f003981 | 2439 | |
ff0dacd7 | 2440 | while (rejected != CATEGORY_MASK_ISO) |
4ed46869 | 2441 | { |
df7492f9 | 2442 | ONE_MORE_BYTE (c); |
4ed46869 KH |
2443 | switch (c) |
2444 | { | |
2445 | case ISO_CODE_ESC: | |
74383408 KH |
2446 | if (inhibit_iso_escape_detection) |
2447 | break; | |
f46869e4 | 2448 | single_shifting = 0; |
df7492f9 | 2449 | ONE_MORE_BYTE (c); |
d46c5b12 | 2450 | if (c >= '(' && c <= '/') |
4ed46869 | 2451 | { |
bf9cdd4e | 2452 | /* Designation sequence for a charset of dimension 1. */ |
df7492f9 | 2453 | ONE_MORE_BYTE (c1); |
d46c5b12 | 2454 | if (c1 < ' ' || c1 >= 0x80 |
df7492f9 | 2455 | || (id = iso_charset_table[0][c >= ','][c1]) < 0) |
d46c5b12 KH |
2456 | /* Invalid designation sequence. Just ignore. */ |
2457 | break; | |
bf9cdd4e KH |
2458 | } |
2459 | else if (c == '$') | |
2460 | { | |
2461 | /* Designation sequence for a charset of dimension 2. */ | |
df7492f9 | 2462 | ONE_MORE_BYTE (c); |
bf9cdd4e KH |
2463 | if (c >= '@' && c <= 'B') |
2464 | /* Designation for JISX0208.1978, GB2312, or JISX0208. */ | |
ff0dacd7 | 2465 | id = iso_charset_table[1][0][c]; |
bf9cdd4e | 2466 | else if (c >= '(' && c <= '/') |
bcf26d6a | 2467 | { |
df7492f9 | 2468 | ONE_MORE_BYTE (c1); |
d46c5b12 | 2469 | if (c1 < ' ' || c1 >= 0x80 |
df7492f9 | 2470 | || (id = iso_charset_table[1][c >= ','][c1]) < 0) |
d46c5b12 KH |
2471 | /* Invalid designation sequence. Just ignore. */ |
2472 | break; | |
bcf26d6a | 2473 | } |
bf9cdd4e | 2474 | else |
ff0dacd7 | 2475 | /* Invalid designation sequence. Just ignore it. */ |
d46c5b12 KH |
2476 | break; |
2477 | } | |
ae9ff118 | 2478 | else if (c == 'N' || c == 'O') |
d46c5b12 | 2479 | { |
ae9ff118 | 2480 | /* ESC <Fe> for SS2 or SS3. */ |
ff0dacd7 KH |
2481 | single_shifting = 1; |
2482 | rejected |= CATEGORY_MASK_ISO_7BIT | CATEGORY_MASK_ISO_8BIT; | |
d46c5b12 | 2483 | break; |
4ed46869 | 2484 | } |
ec6d2bb8 KH |
2485 | else if (c >= '0' && c <= '4') |
2486 | { | |
2487 | /* ESC <Fp> for start/end composition. */ | |
ff0dacd7 | 2488 | found |= CATEGORY_MASK_ISO; |
ec6d2bb8 KH |
2489 | break; |
2490 | } | |
bf9cdd4e | 2491 | else |
df7492f9 | 2492 | { |
ff0dacd7 | 2493 | /* Invalid escape sequence. Just ignore it. */ |
df7492f9 KH |
2494 | break; |
2495 | } | |
d46c5b12 KH |
2496 | |
2497 | /* We found a valid designation sequence for CHARSET. */ | |
ff0dacd7 | 2498 | rejected |= CATEGORY_MASK_ISO_8BIT; |
df7492f9 KH |
2499 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7], |
2500 | id)) | |
ff0dacd7 | 2501 | found |= CATEGORY_MASK_ISO_7; |
d46c5b12 | 2502 | else |
ff0dacd7 | 2503 | rejected |= CATEGORY_MASK_ISO_7; |
df7492f9 KH |
2504 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7_tight], |
2505 | id)) | |
ff0dacd7 | 2506 | found |= CATEGORY_MASK_ISO_7_TIGHT; |
d46c5b12 | 2507 | else |
ff0dacd7 | 2508 | rejected |= CATEGORY_MASK_ISO_7_TIGHT; |
df7492f9 KH |
2509 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7_else], |
2510 | id)) | |
ff0dacd7 | 2511 | found |= CATEGORY_MASK_ISO_7_ELSE; |
ae9ff118 | 2512 | else |
ff0dacd7 | 2513 | rejected |= CATEGORY_MASK_ISO_7_ELSE; |
df7492f9 KH |
2514 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_8_else], |
2515 | id)) | |
ff0dacd7 | 2516 | found |= CATEGORY_MASK_ISO_8_ELSE; |
ae9ff118 | 2517 | else |
ff0dacd7 | 2518 | rejected |= CATEGORY_MASK_ISO_8_ELSE; |
4ed46869 KH |
2519 | break; |
2520 | ||
4ed46869 | 2521 | case ISO_CODE_SO: |
d46c5b12 | 2522 | case ISO_CODE_SI: |
ff0dacd7 | 2523 | /* Locking shift out/in. */ |
74383408 KH |
2524 | if (inhibit_iso_escape_detection) |
2525 | break; | |
f46869e4 | 2526 | single_shifting = 0; |
ff0dacd7 KH |
2527 | rejected |= CATEGORY_MASK_ISO_7BIT | CATEGORY_MASK_ISO_8BIT; |
2528 | found |= CATEGORY_MASK_ISO_ELSE; | |
d46c5b12 KH |
2529 | break; |
2530 | ||
4ed46869 | 2531 | case ISO_CODE_CSI: |
ff0dacd7 | 2532 | /* Control sequence introducer. */ |
f46869e4 | 2533 | single_shifting = 0; |
ff0dacd7 KH |
2534 | rejected |= CATEGORY_MASK_ISO_7BIT | CATEGORY_MASK_ISO_7_ELSE; |
2535 | found |= CATEGORY_MASK_ISO_8_ELSE; | |
2536 | goto check_extra_latin; | |
2537 | ||
2538 | ||
4ed46869 KH |
2539 | case ISO_CODE_SS2: |
2540 | case ISO_CODE_SS3: | |
ff0dacd7 KH |
2541 | /* Single shift. */ |
2542 | if (inhibit_iso_escape_detection) | |
2543 | break; | |
2544 | single_shifting = 1; | |
2545 | rejected |= CATEGORY_MASK_ISO_7BIT; | |
2546 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_1]) | |
2547 | & CODING_ISO_FLAG_SINGLE_SHIFT) | |
2548 | found |= CATEGORY_MASK_ISO_8_1; | |
2549 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_2]) | |
2550 | & CODING_ISO_FLAG_SINGLE_SHIFT) | |
2551 | found |= CATEGORY_MASK_ISO_8_2; | |
2552 | goto check_extra_latin; | |
4ed46869 KH |
2553 | |
2554 | default: | |
2555 | if (c < 0x80) | |
f46869e4 KH |
2556 | { |
2557 | single_shifting = 0; | |
2558 | break; | |
2559 | } | |
ff0dacd7 | 2560 | if (c >= 0xA0) |
c4825358 | 2561 | { |
ff0dacd7 KH |
2562 | rejected |= CATEGORY_MASK_ISO_7BIT | CATEGORY_MASK_ISO_7_ELSE; |
2563 | found |= CATEGORY_MASK_ISO_8_1; | |
f46869e4 | 2564 | /* Check the length of succeeding codes of the range |
ff0dacd7 KH |
2565 | 0xA0..0FF. If the byte length is even, we include |
2566 | CATEGORY_MASK_ISO_8_2 in `found'. We can check this | |
2567 | only when we are not single shifting. */ | |
2568 | if (! single_shifting | |
2569 | && ! (rejected & CATEGORY_MASK_ISO_8_2)) | |
f46869e4 | 2570 | { |
e17de821 | 2571 | int i = 1; |
b73bfc1c KH |
2572 | while (src < src_end) |
2573 | { | |
df7492f9 | 2574 | ONE_MORE_BYTE (c); |
b73bfc1c KH |
2575 | if (c < 0xA0) |
2576 | break; | |
2577 | i++; | |
2578 | } | |
2579 | ||
2580 | if (i & 1 && src < src_end) | |
ff0dacd7 | 2581 | rejected |= CATEGORY_MASK_ISO_8_2; |
f46869e4 | 2582 | else |
ff0dacd7 | 2583 | found |= CATEGORY_MASK_ISO_8_2; |
f46869e4 | 2584 | } |
ff0dacd7 | 2585 | break; |
4ed46869 | 2586 | } |
ff0dacd7 KH |
2587 | check_extra_latin: |
2588 | single_shifting = 0; | |
2589 | if (! VECTORP (Vlatin_extra_code_table) | |
2590 | || NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
2591 | { | |
2592 | rejected = CATEGORY_MASK_ISO; | |
2593 | break; | |
2594 | } | |
2595 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_1]) | |
2596 | & CODING_ISO_FLAG_LATIN_EXTRA) | |
2597 | found |= CATEGORY_MASK_ISO_8_1; | |
2598 | else | |
2599 | rejected |= CATEGORY_MASK_ISO_8_1; | |
2600 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_2]) | |
2601 | & CODING_ISO_FLAG_LATIN_EXTRA) | |
2602 | found |= CATEGORY_MASK_ISO_8_2; | |
2603 | else | |
2604 | rejected |= CATEGORY_MASK_ISO_8_2; | |
4ed46869 KH |
2605 | } |
2606 | } | |
ff0dacd7 KH |
2607 | detect_info->rejected |= CATEGORY_MASK_ISO; |
2608 | return 0; | |
4ed46869 | 2609 | |
df7492f9 | 2610 | no_more_source: |
ff0dacd7 KH |
2611 | detect_info->rejected |= rejected; |
2612 | detect_info->found |= (found & ~rejected); | |
df7492f9 | 2613 | return 1; |
4ed46869 | 2614 | } |
ec6d2bb8 | 2615 | |
4ed46869 KH |
2616 | |
2617 | /* Set designation state into CODING. */ | |
df7492f9 KH |
2618 | #define DECODE_DESIGNATION(reg, dim, chars_96, final) \ |
2619 | do { \ | |
2620 | int id, prev; \ | |
2621 | \ | |
2622 | if (final < '0' || final >= 128 \ | |
2623 | || ((id = ISO_CHARSET_TABLE (dim, chars_96, final)) < 0) \ | |
2624 | || !SAFE_CHARSET_P (coding, id)) \ | |
2625 | { \ | |
2626 | CODING_ISO_DESIGNATION (coding, reg) = -2; \ | |
2627 | goto invalid_code; \ | |
2628 | } \ | |
2629 | prev = CODING_ISO_DESIGNATION (coding, reg); \ | |
bf16eb23 KH |
2630 | if (id == charset_jisx0201_roman) \ |
2631 | { \ | |
2632 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_ROMAN) \ | |
2633 | id = charset_ascii; \ | |
2634 | } \ | |
2635 | else if (id == charset_jisx0208_1978) \ | |
2636 | { \ | |
2637 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_OLDJIS) \ | |
2638 | id = charset_jisx0208; \ | |
2639 | } \ | |
df7492f9 KH |
2640 | CODING_ISO_DESIGNATION (coding, reg) = id; \ |
2641 | /* If there was an invalid designation to REG previously, and this \ | |
2642 | designation is ASCII to REG, we should keep this designation \ | |
2643 | sequence. */ \ | |
2644 | if (prev == -2 && id == charset_ascii) \ | |
2645 | goto invalid_code; \ | |
4ed46869 KH |
2646 | } while (0) |
2647 | ||
d46c5b12 | 2648 | |
df7492f9 KH |
2649 | #define MAYBE_FINISH_COMPOSITION() \ |
2650 | do { \ | |
2651 | int i; \ | |
2652 | if (composition_state == COMPOSING_NO) \ | |
2653 | break; \ | |
2654 | /* It is assured that we have enough room for producing \ | |
2655 | characters stored in the table `components'. */ \ | |
2656 | if (charbuf + component_idx > charbuf_end) \ | |
2657 | goto no_more_source; \ | |
2658 | composition_state = COMPOSING_NO; \ | |
2659 | if (method == COMPOSITION_RELATIVE \ | |
2660 | || method == COMPOSITION_WITH_ALTCHARS) \ | |
2661 | { \ | |
2662 | for (i = 0; i < component_idx; i++) \ | |
2663 | *charbuf++ = components[i]; \ | |
2664 | char_offset += component_idx; \ | |
2665 | } \ | |
2666 | else \ | |
2667 | { \ | |
2668 | for (i = 0; i < component_idx; i += 2) \ | |
2669 | *charbuf++ = components[i]; \ | |
2670 | char_offset += (component_idx / 2) + 1; \ | |
2671 | } \ | |
2672 | } while (0) | |
2673 | ||
d46c5b12 | 2674 | |
aa72b389 KH |
2675 | /* Handle composition start sequence ESC 0, ESC 2, ESC 3, or ESC 4. |
2676 | ESC 0 : relative composition : ESC 0 CHAR ... ESC 1 | |
2677 | ESC 2 : rulebase composition : ESC 2 CHAR RULE CHAR RULE ... CHAR ESC 1 | |
df7492f9 KH |
2678 | ESC 3 : altchar composition : ESC 3 CHAR ... ESC 0 CHAR ... ESC 1 |
2679 | ESC 4 : alt&rule composition : ESC 4 CHAR RULE ... CHAR ESC 0 CHAR ... ESC 1 | |
aa72b389 | 2680 | */ |
ec6d2bb8 | 2681 | |
df7492f9 KH |
2682 | #define DECODE_COMPOSITION_START(c1) \ |
2683 | do { \ | |
2684 | if (c1 == '0' \ | |
781d7a48 | 2685 | && composition_state == COMPOSING_COMPONENT_RULE) \ |
df7492f9 KH |
2686 | { \ |
2687 | component_len = component_idx; \ | |
2688 | composition_state = COMPOSING_CHAR; \ | |
2689 | } \ | |
2690 | else \ | |
2691 | { \ | |
8f924df7 | 2692 | const unsigned char *p; \ |
df7492f9 KH |
2693 | \ |
2694 | MAYBE_FINISH_COMPOSITION (); \ | |
2695 | if (charbuf + MAX_COMPOSITION_COMPONENTS > charbuf_end) \ | |
2696 | goto no_more_source; \ | |
2697 | for (p = src; p < src_end - 1; p++) \ | |
2698 | if (*p == ISO_CODE_ESC && p[1] == '1') \ | |
2699 | break; \ | |
2700 | if (p == src_end - 1) \ | |
2701 | { \ | |
2702 | if (coding->mode & CODING_MODE_LAST_BLOCK) \ | |
2703 | goto invalid_code; \ | |
2704 | goto no_more_source; \ | |
2705 | } \ | |
2706 | \ | |
2707 | /* This is surely the start of a composition. */ \ | |
2708 | method = (c1 == '0' ? COMPOSITION_RELATIVE \ | |
2709 | : c1 == '2' ? COMPOSITION_WITH_RULE \ | |
2710 | : c1 == '3' ? COMPOSITION_WITH_ALTCHARS \ | |
2711 | : COMPOSITION_WITH_RULE_ALTCHARS); \ | |
2712 | composition_state = (c1 <= '2' ? COMPOSING_CHAR \ | |
2713 | : COMPOSING_COMPONENT_CHAR); \ | |
2714 | component_idx = component_len = 0; \ | |
2715 | } \ | |
ec6d2bb8 KH |
2716 | } while (0) |
2717 | ||
ec6d2bb8 | 2718 | |
df7492f9 KH |
2719 | /* Handle compositoin end sequence ESC 1. */ |
2720 | ||
2721 | #define DECODE_COMPOSITION_END() \ | |
ec6d2bb8 | 2722 | do { \ |
df7492f9 KH |
2723 | int nchars = (component_len > 0 ? component_idx - component_len \ |
2724 | : method == COMPOSITION_RELATIVE ? component_idx \ | |
2725 | : (component_idx + 1) / 2); \ | |
2726 | int i; \ | |
2727 | int *saved_charbuf = charbuf; \ | |
8f924df7 | 2728 | int from = char_offset; \ |
ff0dacd7 | 2729 | int to = from + nchars; \ |
df7492f9 | 2730 | \ |
ff0dacd7 | 2731 | ADD_COMPOSITION_DATA (charbuf, from, to, method); \ |
df7492f9 | 2732 | if (method != COMPOSITION_RELATIVE) \ |
ec6d2bb8 | 2733 | { \ |
df7492f9 KH |
2734 | if (component_len == 0) \ |
2735 | for (i = 0; i < component_idx; i++) \ | |
2736 | *charbuf++ = components[i]; \ | |
2737 | else \ | |
2738 | for (i = 0; i < component_len; i++) \ | |
2739 | *charbuf++ = components[i]; \ | |
2740 | *saved_charbuf = saved_charbuf - charbuf; \ | |
ec6d2bb8 | 2741 | } \ |
df7492f9 KH |
2742 | if (method == COMPOSITION_WITH_RULE) \ |
2743 | for (i = 0; i < component_idx; i += 2, char_offset++) \ | |
2744 | *charbuf++ = components[i]; \ | |
ec6d2bb8 | 2745 | else \ |
df7492f9 KH |
2746 | for (i = component_len; i < component_idx; i++, char_offset++) \ |
2747 | *charbuf++ = components[i]; \ | |
2748 | coding->annotated = 1; \ | |
2749 | composition_state = COMPOSING_NO; \ | |
ec6d2bb8 KH |
2750 | } while (0) |
2751 | ||
df7492f9 | 2752 | |
ec6d2bb8 KH |
2753 | /* Decode a composition rule from the byte C1 (and maybe one more byte |
2754 | from SRC) and store one encoded composition rule in | |
2755 | coding->cmp_data. */ | |
2756 | ||
2757 | #define DECODE_COMPOSITION_RULE(c1) \ | |
2758 | do { \ | |
ec6d2bb8 KH |
2759 | (c1) -= 32; \ |
2760 | if (c1 < 81) /* old format (before ver.21) */ \ | |
2761 | { \ | |
2762 | int gref = (c1) / 9; \ | |
2763 | int nref = (c1) % 9; \ | |
2764 | if (gref == 4) gref = 10; \ | |
2765 | if (nref == 4) nref = 10; \ | |
df7492f9 | 2766 | c1 = COMPOSITION_ENCODE_RULE (gref, nref); \ |
ec6d2bb8 | 2767 | } \ |
b73bfc1c | 2768 | else if (c1 < 93) /* new format (after ver.21) */ \ |
ec6d2bb8 KH |
2769 | { \ |
2770 | ONE_MORE_BYTE (c2); \ | |
df7492f9 | 2771 | c1 = COMPOSITION_ENCODE_RULE (c1 - 81, c2 - 32); \ |
ec6d2bb8 | 2772 | } \ |
df7492f9 KH |
2773 | else \ |
2774 | c1 = 0; \ | |
ec6d2bb8 | 2775 | } while (0) |
88993dfd | 2776 | |
d46c5b12 | 2777 | |
4ed46869 KH |
2778 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
2779 | ||
b73bfc1c | 2780 | static void |
df7492f9 | 2781 | decode_coding_iso_2022 (coding) |
4ed46869 | 2782 | struct coding_system *coding; |
4ed46869 | 2783 | { |
8f924df7 KH |
2784 | const unsigned char *src = coding->source + coding->consumed; |
2785 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
2786 | const unsigned char *src_base; | |
df7492f9 | 2787 | int *charbuf = coding->charbuf; |
ff0dacd7 KH |
2788 | int *charbuf_end |
2789 | = charbuf + coding->charbuf_size - 4 - MAX_ANNOTATION_LENGTH; | |
df7492f9 | 2790 | int consumed_chars = 0, consumed_chars_base; |
df7492f9 | 2791 | int multibytep = coding->src_multibyte; |
4ed46869 | 2792 | /* Charsets invoked to graphic plane 0 and 1 respectively. */ |
df7492f9 KH |
2793 | int charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); |
2794 | int charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
2795 | struct charset *charset; | |
2796 | int c; | |
2797 | /* For handling composition sequence. */ | |
2798 | #define COMPOSING_NO 0 | |
2799 | #define COMPOSING_CHAR 1 | |
2800 | #define COMPOSING_RULE 2 | |
2801 | #define COMPOSING_COMPONENT_CHAR 3 | |
2802 | #define COMPOSING_COMPONENT_RULE 4 | |
2803 | ||
2804 | int composition_state = COMPOSING_NO; | |
2805 | enum composition_method method; | |
2806 | int components[MAX_COMPOSITION_COMPONENTS * 2 + 1]; | |
2807 | int component_idx; | |
2808 | int component_len; | |
2809 | Lisp_Object attrs, eol_type, charset_list; | |
ff0dacd7 KH |
2810 | int char_offset = coding->produced_char; |
2811 | int last_offset = char_offset; | |
2812 | int last_id = charset_ascii; | |
df7492f9 KH |
2813 | |
2814 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
2815 | setup_iso_safe_charsets (attrs); | |
b73bfc1c KH |
2816 | |
2817 | while (1) | |
4ed46869 | 2818 | { |
463f5630 | 2819 | int c1, c2; |
b73bfc1c KH |
2820 | |
2821 | src_base = src; | |
df7492f9 KH |
2822 | consumed_chars_base = consumed_chars; |
2823 | ||
2824 | if (charbuf >= charbuf_end) | |
2825 | break; | |
2826 | ||
b73bfc1c | 2827 | ONE_MORE_BYTE (c1); |
4ed46869 | 2828 | |
98725083 | 2829 | /* We produce at most one character. */ |
4ed46869 KH |
2830 | switch (iso_code_class [c1]) |
2831 | { | |
2832 | case ISO_0x20_or_0x7F: | |
df7492f9 | 2833 | if (composition_state != COMPOSING_NO) |
ec6d2bb8 | 2834 | { |
df7492f9 KH |
2835 | if (composition_state == COMPOSING_RULE |
2836 | || composition_state == COMPOSING_COMPONENT_RULE) | |
2837 | { | |
2838 | DECODE_COMPOSITION_RULE (c1); | |
2839 | components[component_idx++] = c1; | |
2840 | composition_state--; | |
2841 | continue; | |
2842 | } | |
4ed46869 | 2843 | } |
df7492f9 KH |
2844 | if (charset_id_0 < 0 |
2845 | || ! CHARSET_ISO_CHARS_96 (CHARSET_FROM_ID (charset_id_0))) | |
781d7a48 KH |
2846 | /* This is SPACE or DEL. */ |
2847 | charset = CHARSET_FROM_ID (charset_ascii); | |
2848 | else | |
2849 | charset = CHARSET_FROM_ID (charset_id_0); | |
2850 | break; | |
4ed46869 KH |
2851 | |
2852 | case ISO_graphic_plane_0: | |
781d7a48 | 2853 | if (composition_state != COMPOSING_NO) |
b73bfc1c | 2854 | { |
781d7a48 KH |
2855 | if (composition_state == COMPOSING_RULE |
2856 | || composition_state == COMPOSING_COMPONENT_RULE) | |
2857 | { | |
2858 | DECODE_COMPOSITION_RULE (c1); | |
2859 | components[component_idx++] = c1; | |
2860 | composition_state--; | |
2861 | continue; | |
2862 | } | |
b73bfc1c | 2863 | } |
df7492f9 | 2864 | charset = CHARSET_FROM_ID (charset_id_0); |
4ed46869 KH |
2865 | break; |
2866 | ||
2867 | case ISO_0xA0_or_0xFF: | |
df7492f9 KH |
2868 | if (charset_id_1 < 0 |
2869 | || ! CHARSET_ISO_CHARS_96 (CHARSET_FROM_ID (charset_id_1)) | |
2870 | || CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) | |
2871 | goto invalid_code; | |
4ed46869 KH |
2872 | /* This is a graphic character, we fall down ... */ |
2873 | ||
2874 | case ISO_graphic_plane_1: | |
df7492f9 KH |
2875 | if (charset_id_1 < 0) |
2876 | goto invalid_code; | |
2877 | charset = CHARSET_FROM_ID (charset_id_1); | |
4ed46869 KH |
2878 | break; |
2879 | ||
2880 | case ISO_carriage_return: | |
df7492f9 | 2881 | if (c1 == '\r') |
4ed46869 | 2882 | { |
df7492f9 | 2883 | if (EQ (eol_type, Qdos)) |
4ed46869 | 2884 | { |
df7492f9 | 2885 | if (src == src_end) |
98725083 KH |
2886 | { |
2887 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; | |
2888 | goto no_more_source; | |
8f924df7 | 2889 | } |
df7492f9 KH |
2890 | if (*src == '\n') |
2891 | ONE_MORE_BYTE (c1); | |
4ed46869 | 2892 | } |
df7492f9 KH |
2893 | else if (EQ (eol_type, Qmac)) |
2894 | c1 = '\n'; | |
4ed46869 | 2895 | } |
df7492f9 KH |
2896 | /* fall through */ |
2897 | ||
2898 | case ISO_control_0: | |
2899 | MAYBE_FINISH_COMPOSITION (); | |
2900 | charset = CHARSET_FROM_ID (charset_ascii); | |
4ed46869 KH |
2901 | break; |
2902 | ||
df7492f9 KH |
2903 | case ISO_control_1: |
2904 | MAYBE_FINISH_COMPOSITION (); | |
2905 | goto invalid_code; | |
2906 | ||
4ed46869 | 2907 | case ISO_shift_out: |
df7492f9 KH |
2908 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
2909 | || CODING_ISO_DESIGNATION (coding, 1) < 0) | |
2910 | goto invalid_code; | |
2911 | CODING_ISO_INVOCATION (coding, 0) = 1; | |
2912 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 2913 | continue; |
4ed46869 KH |
2914 | |
2915 | case ISO_shift_in: | |
df7492f9 KH |
2916 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT)) |
2917 | goto invalid_code; | |
2918 | CODING_ISO_INVOCATION (coding, 0) = 0; | |
2919 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 2920 | continue; |
4ed46869 KH |
2921 | |
2922 | case ISO_single_shift_2_7: | |
2923 | case ISO_single_shift_2: | |
df7492f9 KH |
2924 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT)) |
2925 | goto invalid_code; | |
4ed46869 KH |
2926 | /* SS2 is handled as an escape sequence of ESC 'N' */ |
2927 | c1 = 'N'; | |
2928 | goto label_escape_sequence; | |
2929 | ||
2930 | case ISO_single_shift_3: | |
df7492f9 KH |
2931 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT)) |
2932 | goto invalid_code; | |
4ed46869 KH |
2933 | /* SS2 is handled as an escape sequence of ESC 'O' */ |
2934 | c1 = 'O'; | |
2935 | goto label_escape_sequence; | |
2936 | ||
2937 | case ISO_control_sequence_introducer: | |
2938 | /* CSI is handled as an escape sequence of ESC '[' ... */ | |
2939 | c1 = '['; | |
2940 | goto label_escape_sequence; | |
2941 | ||
2942 | case ISO_escape: | |
2943 | ONE_MORE_BYTE (c1); | |
2944 | label_escape_sequence: | |
df7492f9 | 2945 | /* Escape sequences handled here are invocation, |
4ed46869 KH |
2946 | designation, direction specification, and character |
2947 | composition specification. */ | |
2948 | switch (c1) | |
2949 | { | |
2950 | case '&': /* revision of following character set */ | |
2951 | ONE_MORE_BYTE (c1); | |
2952 | if (!(c1 >= '@' && c1 <= '~')) | |
df7492f9 | 2953 | goto invalid_code; |
4ed46869 KH |
2954 | ONE_MORE_BYTE (c1); |
2955 | if (c1 != ISO_CODE_ESC) | |
df7492f9 | 2956 | goto invalid_code; |
4ed46869 KH |
2957 | ONE_MORE_BYTE (c1); |
2958 | goto label_escape_sequence; | |
2959 | ||
2960 | case '$': /* designation of 2-byte character set */ | |
df7492f9 KH |
2961 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATION)) |
2962 | goto invalid_code; | |
4ed46869 KH |
2963 | ONE_MORE_BYTE (c1); |
2964 | if (c1 >= '@' && c1 <= 'B') | |
2965 | { /* designation of JISX0208.1978, GB2312.1980, | |
88993dfd | 2966 | or JISX0208.1980 */ |
df7492f9 | 2967 | DECODE_DESIGNATION (0, 2, 0, c1); |
4ed46869 KH |
2968 | } |
2969 | else if (c1 >= 0x28 && c1 <= 0x2B) | |
2970 | { /* designation of DIMENSION2_CHARS94 character set */ | |
2971 | ONE_MORE_BYTE (c2); | |
df7492f9 | 2972 | DECODE_DESIGNATION (c1 - 0x28, 2, 0, c2); |
4ed46869 KH |
2973 | } |
2974 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
2975 | { /* designation of DIMENSION2_CHARS96 character set */ | |
2976 | ONE_MORE_BYTE (c2); | |
df7492f9 | 2977 | DECODE_DESIGNATION (c1 - 0x2C, 2, 1, c2); |
4ed46869 KH |
2978 | } |
2979 | else | |
df7492f9 | 2980 | goto invalid_code; |
b73bfc1c | 2981 | /* We must update these variables now. */ |
df7492f9 KH |
2982 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); |
2983 | charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
b73bfc1c | 2984 | continue; |
4ed46869 KH |
2985 | |
2986 | case 'n': /* invocation of locking-shift-2 */ | |
df7492f9 KH |
2987 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
2988 | || CODING_ISO_DESIGNATION (coding, 2) < 0) | |
2989 | goto invalid_code; | |
2990 | CODING_ISO_INVOCATION (coding, 0) = 2; | |
2991 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 2992 | continue; |
4ed46869 KH |
2993 | |
2994 | case 'o': /* invocation of locking-shift-3 */ | |
df7492f9 KH |
2995 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
2996 | || CODING_ISO_DESIGNATION (coding, 3) < 0) | |
2997 | goto invalid_code; | |
2998 | CODING_ISO_INVOCATION (coding, 0) = 3; | |
2999 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 3000 | continue; |
4ed46869 KH |
3001 | |
3002 | case 'N': /* invocation of single-shift-2 */ | |
df7492f9 KH |
3003 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
3004 | || CODING_ISO_DESIGNATION (coding, 2) < 0) | |
3005 | goto invalid_code; | |
3006 | charset = CHARSET_FROM_ID (CODING_ISO_DESIGNATION (coding, 2)); | |
b73bfc1c | 3007 | ONE_MORE_BYTE (c1); |
e7046a18 | 3008 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
df7492f9 | 3009 | goto invalid_code; |
4ed46869 KH |
3010 | break; |
3011 | ||
3012 | case 'O': /* invocation of single-shift-3 */ | |
df7492f9 KH |
3013 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
3014 | || CODING_ISO_DESIGNATION (coding, 3) < 0) | |
3015 | goto invalid_code; | |
3016 | charset = CHARSET_FROM_ID (CODING_ISO_DESIGNATION (coding, 3)); | |
b73bfc1c | 3017 | ONE_MORE_BYTE (c1); |
e7046a18 | 3018 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
df7492f9 | 3019 | goto invalid_code; |
4ed46869 KH |
3020 | break; |
3021 | ||
ec6d2bb8 | 3022 | case '0': case '2': case '3': case '4': /* start composition */ |
df7492f9 KH |
3023 | if (! (coding->common_flags & CODING_ANNOTATE_COMPOSITION_MASK)) |
3024 | goto invalid_code; | |
ec6d2bb8 | 3025 | DECODE_COMPOSITION_START (c1); |
b73bfc1c | 3026 | continue; |
4ed46869 | 3027 | |
ec6d2bb8 | 3028 | case '1': /* end composition */ |
df7492f9 KH |
3029 | if (composition_state == COMPOSING_NO) |
3030 | goto invalid_code; | |
3031 | DECODE_COMPOSITION_END (); | |
b73bfc1c | 3032 | continue; |
4ed46869 KH |
3033 | |
3034 | case '[': /* specification of direction */ | |
df7492f9 KH |
3035 | if (! CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DIRECTION) |
3036 | goto invalid_code; | |
4ed46869 | 3037 | /* For the moment, nested direction is not supported. |
d46c5b12 | 3038 | So, `coding->mode & CODING_MODE_DIRECTION' zero means |
df7492f9 | 3039 | left-to-right, and nozero means right-to-left. */ |
4ed46869 KH |
3040 | ONE_MORE_BYTE (c1); |
3041 | switch (c1) | |
3042 | { | |
3043 | case ']': /* end of the current direction */ | |
d46c5b12 | 3044 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 KH |
3045 | |
3046 | case '0': /* end of the current direction */ | |
3047 | case '1': /* start of left-to-right direction */ | |
3048 | ONE_MORE_BYTE (c1); | |
3049 | if (c1 == ']') | |
d46c5b12 | 3050 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 | 3051 | else |
df7492f9 | 3052 | goto invalid_code; |
4ed46869 KH |
3053 | break; |
3054 | ||
3055 | case '2': /* start of right-to-left direction */ | |
3056 | ONE_MORE_BYTE (c1); | |
3057 | if (c1 == ']') | |
d46c5b12 | 3058 | coding->mode |= CODING_MODE_DIRECTION; |
4ed46869 | 3059 | else |
df7492f9 | 3060 | goto invalid_code; |
4ed46869 KH |
3061 | break; |
3062 | ||
3063 | default: | |
df7492f9 | 3064 | goto invalid_code; |
4ed46869 | 3065 | } |
b73bfc1c | 3066 | continue; |
4ed46869 | 3067 | |
103e0180 | 3068 | case '%': |
103e0180 KH |
3069 | ONE_MORE_BYTE (c1); |
3070 | if (c1 == '/') | |
3071 | { | |
3072 | /* CTEXT extended segment: | |
3073 | ESC % / [0-4] M L --ENCODING-NAME-- \002 --BYTES-- | |
3074 | We keep these bytes as is for the moment. | |
3075 | They may be decoded by post-read-conversion. */ | |
3076 | int dim, M, L; | |
4776e638 | 3077 | int size; |
8f924df7 | 3078 | |
103e0180 KH |
3079 | ONE_MORE_BYTE (dim); |
3080 | ONE_MORE_BYTE (M); | |
3081 | ONE_MORE_BYTE (L); | |
3082 | size = ((M - 128) * 128) + (L - 128); | |
4776e638 KH |
3083 | if (charbuf + 8 + size > charbuf_end) |
3084 | goto break_loop; | |
3085 | *charbuf++ = ISO_CODE_ESC; | |
3086 | *charbuf++ = '%'; | |
3087 | *charbuf++ = '/'; | |
3088 | *charbuf++ = dim; | |
3089 | *charbuf++ = BYTE8_TO_CHAR (M); | |
3090 | *charbuf++ = BYTE8_TO_CHAR (L); | |
103e0180 KH |
3091 | while (size-- > 0) |
3092 | { | |
3093 | ONE_MORE_BYTE (c1); | |
4776e638 | 3094 | *charbuf++ = ASCII_BYTE_P (c1) ? c1 : BYTE8_TO_CHAR (c1); |
103e0180 | 3095 | } |
103e0180 KH |
3096 | } |
3097 | else if (c1 == 'G') | |
3098 | { | |
103e0180 KH |
3099 | /* XFree86 extension for embedding UTF-8 in CTEXT: |
3100 | ESC % G --UTF-8-BYTES-- ESC % @ | |
3101 | We keep these bytes as is for the moment. | |
3102 | They may be decoded by post-read-conversion. */ | |
4776e638 KH |
3103 | int *p = charbuf; |
3104 | ||
3105 | if (p + 6 > charbuf_end) | |
3106 | goto break_loop; | |
3107 | *p++ = ISO_CODE_ESC; | |
3108 | *p++ = '%'; | |
3109 | *p++ = 'G'; | |
3110 | while (p < charbuf_end) | |
103e0180 KH |
3111 | { |
3112 | ONE_MORE_BYTE (c1); | |
3113 | if (c1 == ISO_CODE_ESC | |
3114 | && src + 1 < src_end | |
3115 | && src[0] == '%' | |
3116 | && src[1] == '@') | |
3117 | break; | |
4776e638 | 3118 | *p++ = ASCII_BYTE_P (c1) ? c1 : BYTE8_TO_CHAR (c1); |
103e0180 | 3119 | } |
4776e638 KH |
3120 | if (p + 3 > charbuf_end) |
3121 | goto break_loop; | |
3122 | *p++ = ISO_CODE_ESC; | |
3123 | *p++ = '%'; | |
3124 | *p++ = '@'; | |
3125 | charbuf = p; | |
103e0180 KH |
3126 | } |
3127 | else | |
4776e638 | 3128 | goto invalid_code; |
103e0180 | 3129 | continue; |
4776e638 | 3130 | break; |
103e0180 | 3131 | |
4ed46869 | 3132 | default: |
df7492f9 KH |
3133 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATION)) |
3134 | goto invalid_code; | |
4ed46869 KH |
3135 | if (c1 >= 0x28 && c1 <= 0x2B) |
3136 | { /* designation of DIMENSION1_CHARS94 character set */ | |
3137 | ONE_MORE_BYTE (c2); | |
df7492f9 | 3138 | DECODE_DESIGNATION (c1 - 0x28, 1, 0, c2); |
4ed46869 KH |
3139 | } |
3140 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
3141 | { /* designation of DIMENSION1_CHARS96 character set */ | |
3142 | ONE_MORE_BYTE (c2); | |
df7492f9 | 3143 | DECODE_DESIGNATION (c1 - 0x2C, 1, 1, c2); |
4ed46869 KH |
3144 | } |
3145 | else | |
df7492f9 | 3146 | goto invalid_code; |
b73bfc1c | 3147 | /* We must update these variables now. */ |
df7492f9 KH |
3148 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); |
3149 | charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
b73bfc1c | 3150 | continue; |
4ed46869 | 3151 | } |
b73bfc1c | 3152 | } |
4ed46869 | 3153 | |
ff0dacd7 KH |
3154 | if (charset->id != charset_ascii |
3155 | && last_id != charset->id) | |
3156 | { | |
3157 | if (last_id != charset_ascii) | |
3158 | ADD_CHARSET_DATA (charbuf, last_offset, char_offset, last_id); | |
3159 | last_id = charset->id; | |
3160 | last_offset = char_offset; | |
3161 | } | |
3162 | ||
b73bfc1c | 3163 | /* Now we know CHARSET and 1st position code C1 of a character. |
df7492f9 KH |
3164 | Produce a decoded character while getting 2nd position code |
3165 | C2 if necessary. */ | |
3166 | c1 &= 0x7F; | |
3167 | if (CHARSET_DIMENSION (charset) > 1) | |
b73bfc1c KH |
3168 | { |
3169 | ONE_MORE_BYTE (c2); | |
df7492f9 | 3170 | if (c2 < 0x20 || (c2 >= 0x80 && c2 < 0xA0)) |
b73bfc1c | 3171 | /* C2 is not in a valid range. */ |
df7492f9 KH |
3172 | goto invalid_code; |
3173 | c1 = (c1 << 8) | (c2 & 0x7F); | |
3174 | if (CHARSET_DIMENSION (charset) > 2) | |
3175 | { | |
3176 | ONE_MORE_BYTE (c2); | |
3177 | if (c2 < 0x20 || (c2 >= 0x80 && c2 < 0xA0)) | |
3178 | /* C2 is not in a valid range. */ | |
3179 | goto invalid_code; | |
3180 | c1 = (c1 << 8) | (c2 & 0x7F); | |
3181 | } | |
3182 | } | |
3183 | ||
3184 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c1, c); | |
3185 | if (c < 0) | |
3186 | { | |
3187 | MAYBE_FINISH_COMPOSITION (); | |
3188 | for (; src_base < src; src_base++, char_offset++) | |
3189 | { | |
3190 | if (ASCII_BYTE_P (*src_base)) | |
3191 | *charbuf++ = *src_base; | |
3192 | else | |
3193 | *charbuf++ = BYTE8_TO_CHAR (*src_base); | |
3194 | } | |
3195 | } | |
3196 | else if (composition_state == COMPOSING_NO) | |
3197 | { | |
3198 | *charbuf++ = c; | |
3199 | char_offset++; | |
4ed46869 | 3200 | } |
df7492f9 | 3201 | else |
781d7a48 KH |
3202 | { |
3203 | components[component_idx++] = c; | |
3204 | if (method == COMPOSITION_WITH_RULE | |
3205 | || (method == COMPOSITION_WITH_RULE_ALTCHARS | |
3206 | && composition_state == COMPOSING_COMPONENT_CHAR)) | |
3207 | composition_state++; | |
4ed46869 KH |
3208 | } |
3209 | continue; | |
3210 | ||
df7492f9 KH |
3211 | invalid_code: |
3212 | MAYBE_FINISH_COMPOSITION (); | |
4ed46869 | 3213 | src = src_base; |
df7492f9 KH |
3214 | consumed_chars = consumed_chars_base; |
3215 | ONE_MORE_BYTE (c); | |
3216 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
ff0dacd7 | 3217 | char_offset++; |
df7492f9 | 3218 | coding->errors++; |
4776e638 KH |
3219 | continue; |
3220 | ||
3221 | break_loop: | |
3222 | break; | |
4ed46869 | 3223 | } |
fb88bf2d | 3224 | |
df7492f9 | 3225 | no_more_source: |
ff0dacd7 KH |
3226 | if (last_id != charset_ascii) |
3227 | ADD_CHARSET_DATA (charbuf, last_offset, char_offset, last_id); | |
df7492f9 KH |
3228 | coding->consumed_char += consumed_chars_base; |
3229 | coding->consumed = src_base - coding->source; | |
3230 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
3231 | } |
3232 | ||
b73bfc1c | 3233 | |
f4dee582 | 3234 | /* ISO2022 encoding stuff. */ |
4ed46869 KH |
3235 | |
3236 | /* | |
f4dee582 | 3237 | It is not enough to say just "ISO2022" on encoding, we have to |
df7492f9 | 3238 | specify more details. In Emacs, each coding system of ISO2022 |
4ed46869 | 3239 | variant has the following specifications: |
df7492f9 | 3240 | 1. Initial designation to G0 thru G3. |
4ed46869 KH |
3241 | 2. Allows short-form designation? |
3242 | 3. ASCII should be designated to G0 before control characters? | |
3243 | 4. ASCII should be designated to G0 at end of line? | |
3244 | 5. 7-bit environment or 8-bit environment? | |
3245 | 6. Use locking-shift? | |
3246 | 7. Use Single-shift? | |
3247 | And the following two are only for Japanese: | |
3248 | 8. Use ASCII in place of JIS0201-1976-Roman? | |
3249 | 9. Use JISX0208-1983 in place of JISX0208-1978? | |
df7492f9 KH |
3250 | These specifications are encoded in CODING_ISO_FLAGS (coding) as flag bits |
3251 | defined by macros CODING_ISO_FLAG_XXX. See `coding.h' for more | |
f4dee582 | 3252 | details. |
4ed46869 KH |
3253 | */ |
3254 | ||
3255 | /* Produce codes (escape sequence) for designating CHARSET to graphic | |
b73bfc1c KH |
3256 | register REG at DST, and increment DST. If <final-char> of CHARSET is |
3257 | '@', 'A', or 'B' and the coding system CODING allows, produce | |
3258 | designation sequence of short-form. */ | |
4ed46869 KH |
3259 | |
3260 | #define ENCODE_DESIGNATION(charset, reg, coding) \ | |
3261 | do { \ | |
df7492f9 | 3262 | unsigned char final_char = CHARSET_ISO_FINAL (charset); \ |
4ed46869 KH |
3263 | char *intermediate_char_94 = "()*+"; \ |
3264 | char *intermediate_char_96 = ",-./"; \ | |
df7492f9 KH |
3265 | int revision = -1; \ |
3266 | int c; \ | |
3267 | \ | |
3268 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_REVISION) \ | |
c197f191 | 3269 | revision = CHARSET_ISO_REVISION (charset); \ |
df7492f9 KH |
3270 | \ |
3271 | if (revision >= 0) \ | |
70c22245 | 3272 | { \ |
df7492f9 KH |
3273 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, '&'); \ |
3274 | EMIT_ONE_BYTE ('@' + revision); \ | |
4ed46869 | 3275 | } \ |
df7492f9 | 3276 | EMIT_ONE_ASCII_BYTE (ISO_CODE_ESC); \ |
4ed46869 KH |
3277 | if (CHARSET_DIMENSION (charset) == 1) \ |
3278 | { \ | |
df7492f9 KH |
3279 | if (! CHARSET_ISO_CHARS_96 (charset)) \ |
3280 | c = intermediate_char_94[reg]; \ | |
4ed46869 | 3281 | else \ |
df7492f9 KH |
3282 | c = intermediate_char_96[reg]; \ |
3283 | EMIT_ONE_ASCII_BYTE (c); \ | |
4ed46869 KH |
3284 | } \ |
3285 | else \ | |
3286 | { \ | |
df7492f9 KH |
3287 | EMIT_ONE_ASCII_BYTE ('$'); \ |
3288 | if (! CHARSET_ISO_CHARS_96 (charset)) \ | |
4ed46869 | 3289 | { \ |
df7492f9 | 3290 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LONG_FORM \ |
b73bfc1c KH |
3291 | || reg != 0 \ |
3292 | || final_char < '@' || final_char > 'B') \ | |
df7492f9 | 3293 | EMIT_ONE_ASCII_BYTE (intermediate_char_94[reg]); \ |
4ed46869 KH |
3294 | } \ |
3295 | else \ | |
df7492f9 | 3296 | EMIT_ONE_ASCII_BYTE (intermediate_char_96[reg]); \ |
4ed46869 | 3297 | } \ |
df7492f9 KH |
3298 | EMIT_ONE_ASCII_BYTE (final_char); \ |
3299 | \ | |
3300 | CODING_ISO_DESIGNATION (coding, reg) = CHARSET_ID (charset); \ | |
4ed46869 KH |
3301 | } while (0) |
3302 | ||
df7492f9 | 3303 | |
4ed46869 KH |
3304 | /* The following two macros produce codes (control character or escape |
3305 | sequence) for ISO2022 single-shift functions (single-shift-2 and | |
3306 | single-shift-3). */ | |
3307 | ||
df7492f9 KH |
3308 | #define ENCODE_SINGLE_SHIFT_2 \ |
3309 | do { \ | |
3310 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ | |
3311 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'N'); \ | |
3312 | else \ | |
3313 | EMIT_ONE_BYTE (ISO_CODE_SS2); \ | |
3314 | CODING_ISO_SINGLE_SHIFTING (coding) = 1; \ | |
4ed46869 KH |
3315 | } while (0) |
3316 | ||
df7492f9 KH |
3317 | |
3318 | #define ENCODE_SINGLE_SHIFT_3 \ | |
3319 | do { \ | |
3320 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ | |
3321 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'O'); \ | |
3322 | else \ | |
3323 | EMIT_ONE_BYTE (ISO_CODE_SS3); \ | |
3324 | CODING_ISO_SINGLE_SHIFTING (coding) = 1; \ | |
4ed46869 KH |
3325 | } while (0) |
3326 | ||
df7492f9 | 3327 | |
4ed46869 KH |
3328 | /* The following four macros produce codes (control character or |
3329 | escape sequence) for ISO2022 locking-shift functions (shift-in, | |
3330 | shift-out, locking-shift-2, and locking-shift-3). */ | |
3331 | ||
df7492f9 KH |
3332 | #define ENCODE_SHIFT_IN \ |
3333 | do { \ | |
3334 | EMIT_ONE_ASCII_BYTE (ISO_CODE_SI); \ | |
3335 | CODING_ISO_INVOCATION (coding, 0) = 0; \ | |
4ed46869 KH |
3336 | } while (0) |
3337 | ||
df7492f9 KH |
3338 | |
3339 | #define ENCODE_SHIFT_OUT \ | |
3340 | do { \ | |
3341 | EMIT_ONE_ASCII_BYTE (ISO_CODE_SO); \ | |
3342 | CODING_ISO_INVOCATION (coding, 0) = 1; \ | |
4ed46869 KH |
3343 | } while (0) |
3344 | ||
df7492f9 KH |
3345 | |
3346 | #define ENCODE_LOCKING_SHIFT_2 \ | |
3347 | do { \ | |
3348 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'n'); \ | |
3349 | CODING_ISO_INVOCATION (coding, 0) = 2; \ | |
4ed46869 KH |
3350 | } while (0) |
3351 | ||
df7492f9 KH |
3352 | |
3353 | #define ENCODE_LOCKING_SHIFT_3 \ | |
3354 | do { \ | |
3355 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'n'); \ | |
3356 | CODING_ISO_INVOCATION (coding, 0) = 3; \ | |
4ed46869 KH |
3357 | } while (0) |
3358 | ||
df7492f9 | 3359 | |
f4dee582 RS |
3360 | /* Produce codes for a DIMENSION1 character whose character set is |
3361 | CHARSET and whose position-code is C1. Designation and invocation | |
4ed46869 KH |
3362 | sequences are also produced in advance if necessary. */ |
3363 | ||
6e85d753 KH |
3364 | #define ENCODE_ISO_CHARACTER_DIMENSION1(charset, c1) \ |
3365 | do { \ | |
df7492f9 | 3366 | int id = CHARSET_ID (charset); \ |
bf16eb23 KH |
3367 | \ |
3368 | if ((CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_ROMAN) \ | |
3369 | && id == charset_ascii) \ | |
3370 | { \ | |
3371 | id = charset_jisx0201_roman; \ | |
3372 | charset = CHARSET_FROM_ID (id); \ | |
3373 | } \ | |
3374 | \ | |
df7492f9 | 3375 | if (CODING_ISO_SINGLE_SHIFTING (coding)) \ |
6e85d753 | 3376 | { \ |
df7492f9 KH |
3377 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ |
3378 | EMIT_ONE_ASCII_BYTE (c1 & 0x7F); \ | |
6e85d753 | 3379 | else \ |
df7492f9 KH |
3380 | EMIT_ONE_BYTE (c1 | 0x80); \ |
3381 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
6e85d753 KH |
3382 | break; \ |
3383 | } \ | |
df7492f9 | 3384 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 0)) \ |
6e85d753 | 3385 | { \ |
df7492f9 | 3386 | EMIT_ONE_ASCII_BYTE (c1 & 0x7F); \ |
6e85d753 KH |
3387 | break; \ |
3388 | } \ | |
df7492f9 | 3389 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 1)) \ |
6e85d753 | 3390 | { \ |
df7492f9 | 3391 | EMIT_ONE_BYTE (c1 | 0x80); \ |
6e85d753 KH |
3392 | break; \ |
3393 | } \ | |
6e85d753 KH |
3394 | else \ |
3395 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
3396 | must invoke it, or, at first, designate it to some graphic \ | |
3397 | register. Then repeat the loop to actually produce the \ | |
3398 | character. */ \ | |
df7492f9 KH |
3399 | dst = encode_invocation_designation (charset, coding, dst, \ |
3400 | &produced_chars); \ | |
4ed46869 KH |
3401 | } while (1) |
3402 | ||
df7492f9 | 3403 | |
f4dee582 RS |
3404 | /* Produce codes for a DIMENSION2 character whose character set is |
3405 | CHARSET and whose position-codes are C1 and C2. Designation and | |
4ed46869 KH |
3406 | invocation codes are also produced in advance if necessary. */ |
3407 | ||
6e85d753 KH |
3408 | #define ENCODE_ISO_CHARACTER_DIMENSION2(charset, c1, c2) \ |
3409 | do { \ | |
df7492f9 | 3410 | int id = CHARSET_ID (charset); \ |
bf16eb23 KH |
3411 | \ |
3412 | if ((CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_USE_OLDJIS) \ | |
3413 | && id == charset_jisx0208) \ | |
3414 | { \ | |
3415 | id = charset_jisx0208_1978; \ | |
3416 | charset = CHARSET_FROM_ID (id); \ | |
3417 | } \ | |
3418 | \ | |
df7492f9 | 3419 | if (CODING_ISO_SINGLE_SHIFTING (coding)) \ |
6e85d753 | 3420 | { \ |
df7492f9 KH |
3421 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ |
3422 | EMIT_TWO_ASCII_BYTES ((c1) & 0x7F, (c2) & 0x7F); \ | |
6e85d753 | 3423 | else \ |
df7492f9 KH |
3424 | EMIT_TWO_BYTES ((c1) | 0x80, (c2) | 0x80); \ |
3425 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
6e85d753 KH |
3426 | break; \ |
3427 | } \ | |
df7492f9 | 3428 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 0)) \ |
6e85d753 | 3429 | { \ |
df7492f9 | 3430 | EMIT_TWO_ASCII_BYTES ((c1) & 0x7F, (c2) & 0x7F); \ |
6e85d753 KH |
3431 | break; \ |
3432 | } \ | |
df7492f9 | 3433 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 1)) \ |
6e85d753 | 3434 | { \ |
df7492f9 | 3435 | EMIT_TWO_BYTES ((c1) | 0x80, (c2) | 0x80); \ |
6e85d753 KH |
3436 | break; \ |
3437 | } \ | |
6e85d753 KH |
3438 | else \ |
3439 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
3440 | must invoke it, or, at first, designate it to some graphic \ | |
3441 | register. Then repeat the loop to actually produce the \ | |
3442 | character. */ \ | |
df7492f9 KH |
3443 | dst = encode_invocation_designation (charset, coding, dst, \ |
3444 | &produced_chars); \ | |
4ed46869 KH |
3445 | } while (1) |
3446 | ||
05e6f5dc | 3447 | |
df7492f9 KH |
3448 | #define ENCODE_ISO_CHARACTER(charset, c) \ |
3449 | do { \ | |
3450 | int code = ENCODE_CHAR ((charset),(c)); \ | |
3451 | \ | |
3452 | if (CHARSET_DIMENSION (charset) == 1) \ | |
3453 | ENCODE_ISO_CHARACTER_DIMENSION1 ((charset), code); \ | |
3454 | else \ | |
3455 | ENCODE_ISO_CHARACTER_DIMENSION2 ((charset), code >> 8, code & 0xFF); \ | |
84fbb8a0 | 3456 | } while (0) |
bdd9fb48 | 3457 | |
05e6f5dc | 3458 | |
4ed46869 | 3459 | /* Produce designation and invocation codes at a place pointed by DST |
df7492f9 | 3460 | to use CHARSET. The element `spec.iso_2022' of *CODING is updated. |
4ed46869 KH |
3461 | Return new DST. */ |
3462 | ||
3463 | unsigned char * | |
df7492f9 KH |
3464 | encode_invocation_designation (charset, coding, dst, p_nchars) |
3465 | struct charset *charset; | |
4ed46869 KH |
3466 | struct coding_system *coding; |
3467 | unsigned char *dst; | |
df7492f9 | 3468 | int *p_nchars; |
4ed46869 | 3469 | { |
df7492f9 KH |
3470 | int multibytep = coding->dst_multibyte; |
3471 | int produced_chars = *p_nchars; | |
4ed46869 | 3472 | int reg; /* graphic register number */ |
df7492f9 | 3473 | int id = CHARSET_ID (charset); |
4ed46869 KH |
3474 | |
3475 | /* At first, check designations. */ | |
3476 | for (reg = 0; reg < 4; reg++) | |
df7492f9 | 3477 | if (id == CODING_ISO_DESIGNATION (coding, reg)) |
4ed46869 KH |
3478 | break; |
3479 | ||
3480 | if (reg >= 4) | |
3481 | { | |
3482 | /* CHARSET is not yet designated to any graphic registers. */ | |
3483 | /* At first check the requested designation. */ | |
df7492f9 KH |
3484 | reg = CODING_ISO_REQUEST (coding, id); |
3485 | if (reg < 0) | |
1ba9e4ab KH |
3486 | /* Since CHARSET requests no special designation, designate it |
3487 | to graphic register 0. */ | |
4ed46869 KH |
3488 | reg = 0; |
3489 | ||
3490 | ENCODE_DESIGNATION (charset, reg, coding); | |
3491 | } | |
3492 | ||
df7492f9 KH |
3493 | if (CODING_ISO_INVOCATION (coding, 0) != reg |
3494 | && CODING_ISO_INVOCATION (coding, 1) != reg) | |
4ed46869 KH |
3495 | { |
3496 | /* Since the graphic register REG is not invoked to any graphic | |
3497 | planes, invoke it to graphic plane 0. */ | |
3498 | switch (reg) | |
3499 | { | |
3500 | case 0: /* graphic register 0 */ | |
3501 | ENCODE_SHIFT_IN; | |
3502 | break; | |
3503 | ||
3504 | case 1: /* graphic register 1 */ | |
3505 | ENCODE_SHIFT_OUT; | |
3506 | break; | |
3507 | ||
3508 | case 2: /* graphic register 2 */ | |
df7492f9 | 3509 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
4ed46869 KH |
3510 | ENCODE_SINGLE_SHIFT_2; |
3511 | else | |
3512 | ENCODE_LOCKING_SHIFT_2; | |
3513 | break; | |
3514 | ||
3515 | case 3: /* graphic register 3 */ | |
df7492f9 | 3516 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
4ed46869 KH |
3517 | ENCODE_SINGLE_SHIFT_3; |
3518 | else | |
3519 | ENCODE_LOCKING_SHIFT_3; | |
3520 | break; | |
3521 | } | |
3522 | } | |
b73bfc1c | 3523 | |
df7492f9 | 3524 | *p_nchars = produced_chars; |
4ed46869 KH |
3525 | return dst; |
3526 | } | |
3527 | ||
df7492f9 KH |
3528 | /* The following three macros produce codes for indicating direction |
3529 | of text. */ | |
3530 | #define ENCODE_CONTROL_SEQUENCE_INTRODUCER \ | |
ec6d2bb8 | 3531 | do { \ |
df7492f9 KH |
3532 | if (CODING_ISO_FLAGS (coding) == CODING_ISO_FLAG_SEVEN_BITS) \ |
3533 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, '['); \ | |
ec6d2bb8 | 3534 | else \ |
df7492f9 | 3535 | EMIT_ONE_BYTE (ISO_CODE_CSI); \ |
ec6d2bb8 KH |
3536 | } while (0) |
3537 | ||
ec6d2bb8 | 3538 | |
df7492f9 KH |
3539 | #define ENCODE_DIRECTION_R2L() \ |
3540 | do { \ | |
3541 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst); \ | |
3542 | EMIT_TWO_ASCII_BYTES ('2', ']'); \ | |
ec6d2bb8 KH |
3543 | } while (0) |
3544 | ||
ec6d2bb8 | 3545 | |
df7492f9 | 3546 | #define ENCODE_DIRECTION_L2R() \ |
ec6d2bb8 | 3547 | do { \ |
df7492f9 KH |
3548 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst); \ |
3549 | EMIT_TWO_ASCII_BYTES ('0', ']'); \ | |
ec6d2bb8 | 3550 | } while (0) |
4ed46869 | 3551 | |
4ed46869 KH |
3552 | |
3553 | /* Produce codes for designation and invocation to reset the graphic | |
3554 | planes and registers to initial state. */ | |
df7492f9 KH |
3555 | #define ENCODE_RESET_PLANE_AND_REGISTER() \ |
3556 | do { \ | |
3557 | int reg; \ | |
3558 | struct charset *charset; \ | |
3559 | \ | |
3560 | if (CODING_ISO_INVOCATION (coding, 0) != 0) \ | |
3561 | ENCODE_SHIFT_IN; \ | |
3562 | for (reg = 0; reg < 4; reg++) \ | |
3563 | if (CODING_ISO_INITIAL (coding, reg) >= 0 \ | |
3564 | && (CODING_ISO_DESIGNATION (coding, reg) \ | |
3565 | != CODING_ISO_INITIAL (coding, reg))) \ | |
3566 | { \ | |
3567 | charset = CHARSET_FROM_ID (CODING_ISO_INITIAL (coding, reg)); \ | |
3568 | ENCODE_DESIGNATION (charset, reg, coding); \ | |
3569 | } \ | |
4ed46869 KH |
3570 | } while (0) |
3571 | ||
df7492f9 | 3572 | |
bdd9fb48 | 3573 | /* Produce designation sequences of charsets in the line started from |
b73bfc1c | 3574 | SRC to a place pointed by DST, and return updated DST. |
bdd9fb48 KH |
3575 | |
3576 | If the current block ends before any end-of-line, we may fail to | |
d46c5b12 KH |
3577 | find all the necessary designations. */ |
3578 | ||
b73bfc1c | 3579 | static unsigned char * |
df7492f9 | 3580 | encode_designation_at_bol (coding, charbuf, charbuf_end, dst) |
e0e989f6 | 3581 | struct coding_system *coding; |
df7492f9 KH |
3582 | int *charbuf, *charbuf_end; |
3583 | unsigned char *dst; | |
e0e989f6 | 3584 | { |
df7492f9 | 3585 | struct charset *charset; |
bdd9fb48 KH |
3586 | /* Table of charsets to be designated to each graphic register. */ |
3587 | int r[4]; | |
df7492f9 KH |
3588 | int c, found = 0, reg; |
3589 | int produced_chars = 0; | |
3590 | int multibytep = coding->dst_multibyte; | |
3591 | Lisp_Object attrs; | |
3592 | Lisp_Object charset_list; | |
3593 | ||
3594 | attrs = CODING_ID_ATTRS (coding->id); | |
3595 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
3596 | if (EQ (charset_list, Qiso_2022)) | |
3597 | charset_list = Viso_2022_charset_list; | |
bdd9fb48 KH |
3598 | |
3599 | for (reg = 0; reg < 4; reg++) | |
3600 | r[reg] = -1; | |
3601 | ||
b73bfc1c | 3602 | while (found < 4) |
e0e989f6 | 3603 | { |
df7492f9 KH |
3604 | int id; |
3605 | ||
3606 | c = *charbuf++; | |
b73bfc1c KH |
3607 | if (c == '\n') |
3608 | break; | |
df7492f9 KH |
3609 | charset = char_charset (c, charset_list, NULL); |
3610 | id = CHARSET_ID (charset); | |
3611 | reg = CODING_ISO_REQUEST (coding, id); | |
3612 | if (reg >= 0 && r[reg] < 0) | |
bdd9fb48 KH |
3613 | { |
3614 | found++; | |
df7492f9 | 3615 | r[reg] = id; |
bdd9fb48 | 3616 | } |
bdd9fb48 KH |
3617 | } |
3618 | ||
3619 | if (found) | |
3620 | { | |
3621 | for (reg = 0; reg < 4; reg++) | |
3622 | if (r[reg] >= 0 | |
df7492f9 KH |
3623 | && CODING_ISO_DESIGNATION (coding, reg) != r[reg]) |
3624 | ENCODE_DESIGNATION (CHARSET_FROM_ID (r[reg]), reg, coding); | |
e0e989f6 | 3625 | } |
b73bfc1c KH |
3626 | |
3627 | return dst; | |
e0e989f6 KH |
3628 | } |
3629 | ||
4ed46869 KH |
3630 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */ |
3631 | ||
df7492f9 KH |
3632 | static int |
3633 | encode_coding_iso_2022 (coding) | |
4ed46869 | 3634 | struct coding_system *coding; |
4ed46869 | 3635 | { |
df7492f9 KH |
3636 | int multibytep = coding->dst_multibyte; |
3637 | int *charbuf = coding->charbuf; | |
3638 | int *charbuf_end = charbuf + coding->charbuf_used; | |
3639 | unsigned char *dst = coding->destination + coding->produced; | |
3640 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
3641 | int safe_room = 16; | |
3642 | int bol_designation | |
3643 | = (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATE_AT_BOL | |
3644 | && CODING_ISO_BOL (coding)); | |
3645 | int produced_chars = 0; | |
3646 | Lisp_Object attrs, eol_type, charset_list; | |
3647 | int ascii_compatible; | |
b73bfc1c | 3648 | int c; |
ff0dacd7 | 3649 | int preferred_charset_id = -1; |
05e6f5dc | 3650 | |
df7492f9 | 3651 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
004068e4 | 3652 | setup_iso_safe_charsets (attrs); |
ff0dacd7 KH |
3653 | /* Charset list may have been changed. */ |
3654 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); \ | |
8f924df7 | 3655 | coding->safe_charsets = (char *) SDATA (CODING_ATTR_SAFE_CHARSETS(attrs)); |
0eecad43 | 3656 | |
df7492f9 | 3657 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); |
bdd9fb48 | 3658 | |
df7492f9 | 3659 | while (charbuf < charbuf_end) |
4ed46869 | 3660 | { |
df7492f9 | 3661 | ASSURE_DESTINATION (safe_room); |
b73bfc1c | 3662 | |
df7492f9 | 3663 | if (bol_designation) |
b73bfc1c | 3664 | { |
df7492f9 | 3665 | unsigned char *dst_prev = dst; |
4ed46869 | 3666 | |
bdd9fb48 | 3667 | /* We have to produce designation sequences if any now. */ |
df7492f9 KH |
3668 | dst = encode_designation_at_bol (coding, charbuf, charbuf_end, dst); |
3669 | bol_designation = 0; | |
3670 | /* We are sure that designation sequences are all ASCII bytes. */ | |
3671 | produced_chars += dst - dst_prev; | |
e0e989f6 KH |
3672 | } |
3673 | ||
df7492f9 | 3674 | c = *charbuf++; |
ec6d2bb8 | 3675 | |
ff0dacd7 KH |
3676 | if (c < 0) |
3677 | { | |
3678 | /* Handle an annotation. */ | |
3679 | switch (*charbuf) | |
ec6d2bb8 | 3680 | { |
ff0dacd7 KH |
3681 | case CODING_ANNOTATE_COMPOSITION_MASK: |
3682 | /* Not yet implemented. */ | |
3683 | break; | |
3684 | case CODING_ANNOTATE_CHARSET_MASK: | |
3685 | preferred_charset_id = charbuf[3]; | |
3686 | if (preferred_charset_id >= 0 | |
3687 | && NILP (Fmemq (make_number (preferred_charset_id), | |
3688 | charset_list))) | |
3689 | preferred_charset_id = -1; | |
3690 | break; | |
3691 | default: | |
3692 | abort (); | |
4ed46869 | 3693 | } |
ff0dacd7 KH |
3694 | charbuf += -c - 1; |
3695 | continue; | |
4ed46869 | 3696 | } |
ec6d2bb8 | 3697 | |
b73bfc1c KH |
3698 | /* Now encode the character C. */ |
3699 | if (c < 0x20 || c == 0x7F) | |
3700 | { | |
df7492f9 KH |
3701 | if (c == '\n' |
3702 | || (c == '\r' && EQ (eol_type, Qmac))) | |
19a8d9e0 | 3703 | { |
df7492f9 KH |
3704 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_EOL) |
3705 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3706 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_INIT_AT_BOL) | |
b73bfc1c | 3707 | { |
df7492f9 KH |
3708 | int i; |
3709 | ||
3710 | for (i = 0; i < 4; i++) | |
3711 | CODING_ISO_DESIGNATION (coding, i) | |
3712 | = CODING_ISO_INITIAL (coding, i); | |
b73bfc1c | 3713 | } |
df7492f9 KH |
3714 | bol_designation |
3715 | = CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATE_AT_BOL; | |
19a8d9e0 | 3716 | } |
df7492f9 KH |
3717 | else if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_CNTL) |
3718 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3719 | EMIT_ONE_ASCII_BYTE (c); | |
4ed46869 | 3720 | } |
df7492f9 | 3721 | else if (ASCII_CHAR_P (c)) |
88993dfd | 3722 | { |
df7492f9 KH |
3723 | if (ascii_compatible) |
3724 | EMIT_ONE_ASCII_BYTE (c); | |
93dec019 | 3725 | else |
19a8d9e0 | 3726 | { |
bf16eb23 KH |
3727 | struct charset *charset = CHARSET_FROM_ID (charset_ascii); |
3728 | ENCODE_ISO_CHARACTER (charset, c); | |
19a8d9e0 | 3729 | } |
4ed46869 | 3730 | } |
16eafb5d | 3731 | else if (CHAR_BYTE8_P (c)) |
88993dfd | 3732 | { |
16eafb5d KH |
3733 | c = CHAR_TO_BYTE8 (c); |
3734 | EMIT_ONE_BYTE (c); | |
88993dfd | 3735 | } |
b73bfc1c | 3736 | else |
df7492f9 | 3737 | { |
ff0dacd7 | 3738 | struct charset *charset; |
b73bfc1c | 3739 | |
ff0dacd7 KH |
3740 | if (preferred_charset_id >= 0) |
3741 | { | |
3742 | charset = CHARSET_FROM_ID (preferred_charset_id); | |
3743 | if (! CHAR_CHARSET_P (c, charset)) | |
3744 | charset = char_charset (c, charset_list, NULL); | |
3745 | } | |
3746 | else | |
3747 | charset = char_charset (c, charset_list, NULL); | |
df7492f9 KH |
3748 | if (!charset) |
3749 | { | |
41cbe562 KH |
3750 | if (coding->mode & CODING_MODE_SAFE_ENCODING) |
3751 | { | |
3752 | c = CODING_INHIBIT_CHARACTER_SUBSTITUTION; | |
3753 | charset = CHARSET_FROM_ID (charset_ascii); | |
3754 | } | |
3755 | else | |
3756 | { | |
3757 | c = coding->default_char; | |
3758 | charset = char_charset (c, charset_list, NULL); | |
3759 | } | |
df7492f9 KH |
3760 | } |
3761 | ENCODE_ISO_CHARACTER (charset, c); | |
3762 | } | |
84fbb8a0 | 3763 | } |
b73bfc1c | 3764 | |
df7492f9 KH |
3765 | if (coding->mode & CODING_MODE_LAST_BLOCK |
3766 | && CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_EOL) | |
3767 | { | |
3768 | ASSURE_DESTINATION (safe_room); | |
3769 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3770 | } | |
3771 | coding->result = CODING_RESULT_SUCCESS; | |
3772 | CODING_ISO_BOL (coding) = bol_designation; | |
3773 | coding->produced_char += produced_chars; | |
3774 | coding->produced = dst - coding->destination; | |
3775 | return 0; | |
4ed46869 KH |
3776 | } |
3777 | ||
3778 | \f | |
df7492f9 | 3779 | /*** 8,9. SJIS and BIG5 handlers ***/ |
4ed46869 | 3780 | |
df7492f9 | 3781 | /* Although SJIS and BIG5 are not ISO's coding system, they are used |
4ed46869 KH |
3782 | quite widely. So, for the moment, Emacs supports them in the bare |
3783 | C code. But, in the future, they may be supported only by CCL. */ | |
3784 | ||
3785 | /* SJIS is a coding system encoding three character sets: ASCII, right | |
3786 | half of JISX0201-Kana, and JISX0208. An ASCII character is encoded | |
3787 | as is. A character of charset katakana-jisx0201 is encoded by | |
3788 | "position-code + 0x80". A character of charset japanese-jisx0208 | |
3789 | is encoded in 2-byte but two position-codes are divided and shifted | |
df7492f9 | 3790 | so that it fit in the range below. |
4ed46869 KH |
3791 | |
3792 | --- CODE RANGE of SJIS --- | |
3793 | (character set) (range) | |
3794 | ASCII 0x00 .. 0x7F | |
df7492f9 | 3795 | KATAKANA-JISX0201 0xA0 .. 0xDF |
c28a9453 | 3796 | JISX0208 (1st byte) 0x81 .. 0x9F and 0xE0 .. 0xEF |
d14d03ac | 3797 | (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC |
4ed46869 KH |
3798 | ------------------------------- |
3799 | ||
3800 | */ | |
3801 | ||
3802 | /* BIG5 is a coding system encoding two character sets: ASCII and | |
3803 | Big5. An ASCII character is encoded as is. Big5 is a two-byte | |
df7492f9 | 3804 | character set and is encoded in two-byte. |
4ed46869 KH |
3805 | |
3806 | --- CODE RANGE of BIG5 --- | |
3807 | (character set) (range) | |
3808 | ASCII 0x00 .. 0x7F | |
3809 | Big5 (1st byte) 0xA1 .. 0xFE | |
3810 | (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE | |
3811 | -------------------------- | |
3812 | ||
df7492f9 | 3813 | */ |
4ed46869 KH |
3814 | |
3815 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3816 | Check if a text is encoded in SJIS. If it is, return | |
df7492f9 | 3817 | CATEGORY_MASK_SJIS, else return 0. */ |
4ed46869 | 3818 | |
0a28aafb | 3819 | static int |
ff0dacd7 | 3820 | detect_coding_sjis (coding, detect_info) |
df7492f9 | 3821 | struct coding_system *coding; |
ff0dacd7 | 3822 | struct coding_detection_info *detect_info; |
4ed46869 | 3823 | { |
8f924df7 KH |
3824 | const unsigned char *src = coding->source, *src_base = src; |
3825 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
df7492f9 KH |
3826 | int multibytep = coding->src_multibyte; |
3827 | int consumed_chars = 0; | |
3828 | int found = 0; | |
b73bfc1c | 3829 | int c; |
89528eb3 | 3830 | int incomplete; |
df7492f9 | 3831 | |
ff0dacd7 | 3832 | detect_info->checked |= CATEGORY_MASK_SJIS; |
df7492f9 KH |
3833 | /* A coding system of this category is always ASCII compatible. */ |
3834 | src += coding->head_ascii; | |
4ed46869 | 3835 | |
b73bfc1c | 3836 | while (1) |
4ed46869 | 3837 | { |
89528eb3 | 3838 | incomplete = 0; |
df7492f9 | 3839 | ONE_MORE_BYTE (c); |
89528eb3 | 3840 | incomplete = 1; |
682169fe KH |
3841 | if (c < 0x80) |
3842 | continue; | |
df7492f9 | 3843 | if ((c >= 0x81 && c <= 0x9F) || (c >= 0xE0 && c <= 0xEF)) |
4ed46869 | 3844 | { |
df7492f9 | 3845 | ONE_MORE_BYTE (c); |
682169fe | 3846 | if (c < 0x40 || c == 0x7F || c > 0xFC) |
df7492f9 | 3847 | break; |
ff0dacd7 | 3848 | found = CATEGORY_MASK_SJIS; |
4ed46869 | 3849 | } |
df7492f9 | 3850 | else if (c >= 0xA0 && c < 0xE0) |
ff0dacd7 | 3851 | found = CATEGORY_MASK_SJIS; |
df7492f9 KH |
3852 | else |
3853 | break; | |
4ed46869 | 3854 | } |
ff0dacd7 | 3855 | detect_info->rejected |= CATEGORY_MASK_SJIS; |
df7492f9 KH |
3856 | return 0; |
3857 | ||
3858 | no_more_source: | |
89528eb3 KH |
3859 | if (incomplete && coding->mode & CODING_MODE_LAST_BLOCK) |
3860 | { | |
ff0dacd7 | 3861 | detect_info->rejected |= CATEGORY_MASK_SJIS; |
89528eb3 | 3862 | return 0; |
4ed46869 | 3863 | } |
ff0dacd7 KH |
3864 | detect_info->found |= found; |
3865 | return 1; | |
4ed46869 KH |
3866 | } |
3867 | ||
3868 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3869 | Check if a text is encoded in BIG5. If it is, return | |
df7492f9 | 3870 | CATEGORY_MASK_BIG5, else return 0. */ |
4ed46869 | 3871 | |
0a28aafb | 3872 | static int |
ff0dacd7 | 3873 | detect_coding_big5 (coding, detect_info) |
df7492f9 | 3874 | struct coding_system *coding; |
ff0dacd7 | 3875 | struct coding_detection_info *detect_info; |
4ed46869 | 3876 | { |
8f924df7 KH |
3877 | const unsigned char *src = coding->source, *src_base = src; |
3878 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
df7492f9 KH |
3879 | int multibytep = coding->src_multibyte; |
3880 | int consumed_chars = 0; | |
3881 | int found = 0; | |
b73bfc1c | 3882 | int c; |
89528eb3 | 3883 | int incomplete; |
fa42c37f | 3884 | |
ff0dacd7 | 3885 | detect_info->checked |= CATEGORY_MASK_BIG5; |
df7492f9 KH |
3886 | /* A coding system of this category is always ASCII compatible. */ |
3887 | src += coding->head_ascii; | |
fa42c37f | 3888 | |
b73bfc1c | 3889 | while (1) |
fa42c37f | 3890 | { |
89528eb3 | 3891 | incomplete = 0; |
df7492f9 | 3892 | ONE_MORE_BYTE (c); |
89528eb3 | 3893 | incomplete = 1; |
df7492f9 | 3894 | if (c < 0x80) |
fa42c37f | 3895 | continue; |
df7492f9 | 3896 | if (c >= 0xA1) |
fa42c37f | 3897 | { |
df7492f9 KH |
3898 | ONE_MORE_BYTE (c); |
3899 | if (c < 0x40 || (c >= 0x7F && c <= 0xA0)) | |
fa42c37f | 3900 | return 0; |
ff0dacd7 | 3901 | found = CATEGORY_MASK_BIG5; |
fa42c37f | 3902 | } |
df7492f9 KH |
3903 | else |
3904 | break; | |
fa42c37f | 3905 | } |
ff0dacd7 | 3906 | detect_info->rejected |= CATEGORY_MASK_BIG5; |
fa42c37f | 3907 | return 0; |
fa42c37f | 3908 | |
df7492f9 | 3909 | no_more_source: |
89528eb3 KH |
3910 | if (incomplete && coding->mode & CODING_MODE_LAST_BLOCK) |
3911 | { | |
ff0dacd7 | 3912 | detect_info->rejected |= CATEGORY_MASK_BIG5; |
89528eb3 KH |
3913 | return 0; |
3914 | } | |
ff0dacd7 KH |
3915 | detect_info->found |= found; |
3916 | return 1; | |
fa42c37f KH |
3917 | } |
3918 | ||
4ed46869 KH |
3919 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". |
3920 | If SJIS_P is 1, decode SJIS text, else decode BIG5 test. */ | |
fa42c37f | 3921 | |
b73bfc1c | 3922 | static void |
df7492f9 | 3923 | decode_coding_sjis (coding) |
4ed46869 | 3924 | struct coding_system *coding; |
4ed46869 | 3925 | { |
8f924df7 KH |
3926 | const unsigned char *src = coding->source + coding->consumed; |
3927 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
3928 | const unsigned char *src_base; | |
df7492f9 | 3929 | int *charbuf = coding->charbuf; |
ff0dacd7 | 3930 | int *charbuf_end = charbuf + coding->charbuf_size - MAX_ANNOTATION_LENGTH; |
df7492f9 KH |
3931 | int consumed_chars = 0, consumed_chars_base; |
3932 | int multibytep = coding->src_multibyte; | |
3933 | struct charset *charset_roman, *charset_kanji, *charset_kana; | |
3934 | Lisp_Object attrs, eol_type, charset_list, val; | |
ff0dacd7 KH |
3935 | int char_offset = coding->produced_char; |
3936 | int last_offset = char_offset; | |
3937 | int last_id = charset_ascii; | |
a5d301df | 3938 | |
df7492f9 KH |
3939 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
3940 | ||
3941 | val = charset_list; | |
3942 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
89528eb3 KH |
3943 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); |
3944 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))); | |
fa42c37f | 3945 | |
b73bfc1c | 3946 | while (1) |
4ed46869 | 3947 | { |
df7492f9 | 3948 | int c, c1; |
fa42c37f | 3949 | |
b73bfc1c | 3950 | src_base = src; |
df7492f9 | 3951 | consumed_chars_base = consumed_chars; |
fa42c37f | 3952 | |
df7492f9 KH |
3953 | if (charbuf >= charbuf_end) |
3954 | break; | |
3955 | ||
3956 | ONE_MORE_BYTE (c); | |
b73bfc1c | 3957 | |
df7492f9 | 3958 | if (c == '\r') |
4ed46869 | 3959 | { |
df7492f9 | 3960 | if (EQ (eol_type, Qdos)) |
4ed46869 | 3961 | { |
df7492f9 | 3962 | if (src == src_end) |
98725083 KH |
3963 | { |
3964 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; | |
3965 | goto no_more_source; | |
3966 | } | |
df7492f9 KH |
3967 | if (*src == '\n') |
3968 | ONE_MORE_BYTE (c); | |
4ed46869 | 3969 | } |
df7492f9 KH |
3970 | else if (EQ (eol_type, Qmac)) |
3971 | c = '\n'; | |
4ed46869 | 3972 | } |
54f78171 | 3973 | else |
df7492f9 KH |
3974 | { |
3975 | struct charset *charset; | |
fa42c37f | 3976 | |
df7492f9 KH |
3977 | if (c < 0x80) |
3978 | charset = charset_roman; | |
3979 | else | |
4ed46869 | 3980 | { |
df7492f9 KH |
3981 | if (c >= 0xF0) |
3982 | goto invalid_code; | |
3983 | if (c < 0xA0 || c >= 0xE0) | |
fb88bf2d | 3984 | { |
54f78171 | 3985 | /* SJIS -> JISX0208 */ |
df7492f9 KH |
3986 | ONE_MORE_BYTE (c1); |
3987 | if (c1 < 0x40 || c1 == 0x7F || c1 > 0xFC) | |
3988 | goto invalid_code; | |
3989 | c = (c << 8) | c1; | |
3990 | SJIS_TO_JIS (c); | |
3991 | charset = charset_kanji; | |
5e34de15 | 3992 | } |
7487494c | 3993 | else if (c > 0xA0) |
89528eb3 KH |
3994 | { |
3995 | /* SJIS -> JISX0201-Kana */ | |
3996 | c &= 0x7F; | |
3997 | charset = charset_kana; | |
3998 | } | |
7487494c KH |
3999 | else |
4000 | goto invalid_code; | |
df7492f9 | 4001 | } |
ff0dacd7 KH |
4002 | if (charset->id != charset_ascii |
4003 | && last_id != charset->id) | |
4004 | { | |
4005 | if (last_id != charset_ascii) | |
4006 | ADD_CHARSET_DATA (charbuf, last_offset, char_offset, last_id); | |
4007 | last_id = charset->id; | |
4008 | last_offset = char_offset; | |
4009 | } | |
df7492f9 KH |
4010 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c, c); |
4011 | } | |
4012 | *charbuf++ = c; | |
ff0dacd7 | 4013 | char_offset++; |
df7492f9 | 4014 | continue; |
b73bfc1c | 4015 | |
df7492f9 KH |
4016 | invalid_code: |
4017 | src = src_base; | |
4018 | consumed_chars = consumed_chars_base; | |
4019 | ONE_MORE_BYTE (c); | |
4020 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
ff0dacd7 | 4021 | char_offset++; |
df7492f9 KH |
4022 | coding->errors++; |
4023 | } | |
fa42c37f | 4024 | |
df7492f9 | 4025 | no_more_source: |
ff0dacd7 KH |
4026 | if (last_id != charset_ascii) |
4027 | ADD_CHARSET_DATA (charbuf, last_offset, char_offset, last_id); | |
df7492f9 KH |
4028 | coding->consumed_char += consumed_chars_base; |
4029 | coding->consumed = src_base - coding->source; | |
4030 | coding->charbuf_used = charbuf - coding->charbuf; | |
fa42c37f KH |
4031 | } |
4032 | ||
b73bfc1c | 4033 | static void |
df7492f9 | 4034 | decode_coding_big5 (coding) |
4ed46869 | 4035 | struct coding_system *coding; |
4ed46869 | 4036 | { |
8f924df7 KH |
4037 | const unsigned char *src = coding->source + coding->consumed; |
4038 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
4039 | const unsigned char *src_base; | |
df7492f9 | 4040 | int *charbuf = coding->charbuf; |
ff0dacd7 | 4041 | int *charbuf_end = charbuf + coding->charbuf_size - MAX_ANNOTATION_LENGTH; |
df7492f9 KH |
4042 | int consumed_chars = 0, consumed_chars_base; |
4043 | int multibytep = coding->src_multibyte; | |
4044 | struct charset *charset_roman, *charset_big5; | |
4045 | Lisp_Object attrs, eol_type, charset_list, val; | |
ff0dacd7 KH |
4046 | int char_offset = coding->produced_char; |
4047 | int last_offset = char_offset; | |
4048 | int last_id = charset_ascii; | |
df7492f9 KH |
4049 | |
4050 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
4051 | val = charset_list; | |
4052 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
4053 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
4ed46869 | 4054 | |
b73bfc1c | 4055 | while (1) |
4ed46869 | 4056 | { |
df7492f9 | 4057 | int c, c1; |
b73bfc1c KH |
4058 | |
4059 | src_base = src; | |
df7492f9 KH |
4060 | consumed_chars_base = consumed_chars; |
4061 | ||
4062 | if (charbuf >= charbuf_end) | |
4063 | break; | |
4064 | ||
4065 | ONE_MORE_BYTE (c); | |
b73bfc1c | 4066 | |
df7492f9 | 4067 | if (c == '\r') |
4ed46869 | 4068 | { |
df7492f9 | 4069 | if (EQ (eol_type, Qdos)) |
4ed46869 | 4070 | { |
df7492f9 | 4071 | if (src == src_end) |
b73bfc1c | 4072 | { |
98725083 KH |
4073 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; |
4074 | goto no_more_source; | |
d46c5b12 | 4075 | } |
df7492f9 KH |
4076 | if (*src == '\n') |
4077 | ONE_MORE_BYTE (c); | |
4ed46869 | 4078 | } |
df7492f9 KH |
4079 | else if (EQ (eol_type, Qmac)) |
4080 | c = '\n'; | |
4ed46869 | 4081 | } |
54f78171 | 4082 | else |
df7492f9 KH |
4083 | { |
4084 | struct charset *charset; | |
4085 | if (c < 0x80) | |
4086 | charset = charset_roman; | |
fb88bf2d | 4087 | else |
fb88bf2d | 4088 | { |
54f78171 | 4089 | /* BIG5 -> Big5 */ |
df7492f9 KH |
4090 | if (c < 0xA1 || c > 0xFE) |
4091 | goto invalid_code; | |
4092 | ONE_MORE_BYTE (c1); | |
4093 | if (c1 < 0x40 || (c1 > 0x7E && c1 < 0xA1) || c1 > 0xFE) | |
4094 | goto invalid_code; | |
4095 | c = c << 8 | c1; | |
4096 | charset = charset_big5; | |
4ed46869 | 4097 | } |
ff0dacd7 KH |
4098 | if (charset->id != charset_ascii |
4099 | && last_id != charset->id) | |
4100 | { | |
4101 | if (last_id != charset_ascii) | |
4102 | ADD_CHARSET_DATA (charbuf, last_offset, char_offset, last_id); | |
4103 | last_id = charset->id; | |
4104 | last_offset = char_offset; | |
4ed46869 | 4105 | } |
df7492f9 | 4106 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c, c); |
4ed46869 | 4107 | } |
4ed46869 | 4108 | |
df7492f9 | 4109 | *charbuf++ = c; |
ff0dacd7 | 4110 | char_offset++; |
fb88bf2d KH |
4111 | continue; |
4112 | ||
df7492f9 | 4113 | invalid_code: |
4ed46869 | 4114 | src = src_base; |
df7492f9 KH |
4115 | consumed_chars = consumed_chars_base; |
4116 | ONE_MORE_BYTE (c); | |
4117 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
ff0dacd7 | 4118 | char_offset++; |
df7492f9 | 4119 | coding->errors++; |
fb88bf2d | 4120 | } |
d46c5b12 | 4121 | |
df7492f9 | 4122 | no_more_source: |
ff0dacd7 KH |
4123 | if (last_id != charset_ascii) |
4124 | ADD_CHARSET_DATA (charbuf, last_offset, char_offset, last_id); | |
df7492f9 KH |
4125 | coding->consumed_char += consumed_chars_base; |
4126 | coding->consumed = src_base - coding->source; | |
4127 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
4128 | } |
4129 | ||
4130 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". | |
b73bfc1c KH |
4131 | This function can encode charsets `ascii', `katakana-jisx0201', |
4132 | `japanese-jisx0208', `chinese-big5-1', and `chinese-big5-2'. We | |
4133 | are sure that all these charsets are registered as official charset | |
4ed46869 KH |
4134 | (i.e. do not have extended leading-codes). Characters of other |
4135 | charsets are produced without any encoding. If SJIS_P is 1, encode | |
4136 | SJIS text, else encode BIG5 text. */ | |
4137 | ||
df7492f9 KH |
4138 | static int |
4139 | encode_coding_sjis (coding) | |
4ed46869 | 4140 | struct coding_system *coding; |
4ed46869 | 4141 | { |
df7492f9 KH |
4142 | int multibytep = coding->dst_multibyte; |
4143 | int *charbuf = coding->charbuf; | |
4144 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4145 | unsigned char *dst = coding->destination + coding->produced; | |
4146 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4147 | int safe_room = 4; | |
4148 | int produced_chars = 0; | |
4149 | Lisp_Object attrs, eol_type, charset_list, val; | |
4150 | int ascii_compatible; | |
4151 | struct charset *charset_roman, *charset_kanji, *charset_kana; | |
4152 | int c; | |
a5d301df | 4153 | |
df7492f9 KH |
4154 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
4155 | val = charset_list; | |
4156 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
4157 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
4158 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))); | |
4ed46869 | 4159 | |
df7492f9 | 4160 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); |
93dec019 | 4161 | |
df7492f9 KH |
4162 | while (charbuf < charbuf_end) |
4163 | { | |
4164 | ASSURE_DESTINATION (safe_room); | |
4165 | c = *charbuf++; | |
b73bfc1c | 4166 | /* Now encode the character C. */ |
df7492f9 KH |
4167 | if (ASCII_CHAR_P (c) && ascii_compatible) |
4168 | EMIT_ONE_ASCII_BYTE (c); | |
16eafb5d KH |
4169 | else if (CHAR_BYTE8_P (c)) |
4170 | { | |
4171 | c = CHAR_TO_BYTE8 (c); | |
4172 | EMIT_ONE_BYTE (c); | |
4173 | } | |
df7492f9 | 4174 | else |
b73bfc1c | 4175 | { |
df7492f9 KH |
4176 | unsigned code; |
4177 | struct charset *charset = char_charset (c, charset_list, &code); | |
4178 | ||
4179 | if (!charset) | |
4ed46869 | 4180 | { |
41cbe562 | 4181 | if (coding->mode & CODING_MODE_SAFE_ENCODING) |
b73bfc1c | 4182 | { |
41cbe562 KH |
4183 | code = CODING_INHIBIT_CHARACTER_SUBSTITUTION; |
4184 | charset = CHARSET_FROM_ID (charset_ascii); | |
b73bfc1c | 4185 | } |
41cbe562 | 4186 | else |
b73bfc1c | 4187 | { |
41cbe562 KH |
4188 | c = coding->default_char; |
4189 | charset = char_charset (c, charset_list, &code); | |
b73bfc1c | 4190 | } |
b73bfc1c | 4191 | } |
df7492f9 KH |
4192 | if (code == CHARSET_INVALID_CODE (charset)) |
4193 | abort (); | |
4194 | if (charset == charset_kanji) | |
4195 | { | |
4196 | int c1, c2; | |
4197 | JIS_TO_SJIS (code); | |
4198 | c1 = code >> 8, c2 = code & 0xFF; | |
4199 | EMIT_TWO_BYTES (c1, c2); | |
4200 | } | |
4201 | else if (charset == charset_kana) | |
4202 | EMIT_ONE_BYTE (code | 0x80); | |
4203 | else | |
4204 | EMIT_ONE_ASCII_BYTE (code & 0x7F); | |
4205 | } | |
4206 | } | |
4207 | coding->result = CODING_RESULT_SUCCESS; | |
4208 | coding->produced_char += produced_chars; | |
4209 | coding->produced = dst - coding->destination; | |
4210 | return 0; | |
4211 | } | |
4212 | ||
4213 | static int | |
4214 | encode_coding_big5 (coding) | |
4215 | struct coding_system *coding; | |
4216 | { | |
4217 | int multibytep = coding->dst_multibyte; | |
4218 | int *charbuf = coding->charbuf; | |
4219 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4220 | unsigned char *dst = coding->destination + coding->produced; | |
4221 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4222 | int safe_room = 4; | |
4223 | int produced_chars = 0; | |
4224 | Lisp_Object attrs, eol_type, charset_list, val; | |
4225 | int ascii_compatible; | |
4226 | struct charset *charset_roman, *charset_big5; | |
4227 | int c; | |
4228 | ||
4229 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
4230 | val = charset_list; | |
4231 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
4232 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
4233 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); | |
4234 | ||
4235 | while (charbuf < charbuf_end) | |
4236 | { | |
4237 | ASSURE_DESTINATION (safe_room); | |
4238 | c = *charbuf++; | |
4239 | /* Now encode the character C. */ | |
4240 | if (ASCII_CHAR_P (c) && ascii_compatible) | |
4241 | EMIT_ONE_ASCII_BYTE (c); | |
16eafb5d KH |
4242 | else if (CHAR_BYTE8_P (c)) |
4243 | { | |
4244 | c = CHAR_TO_BYTE8 (c); | |
4245 | EMIT_ONE_BYTE (c); | |
b73bfc1c KH |
4246 | } |
4247 | else | |
4248 | { | |
df7492f9 KH |
4249 | unsigned code; |
4250 | struct charset *charset = char_charset (c, charset_list, &code); | |
4251 | ||
4252 | if (! charset) | |
b73bfc1c | 4253 | { |
41cbe562 | 4254 | if (coding->mode & CODING_MODE_SAFE_ENCODING) |
b73bfc1c | 4255 | { |
41cbe562 KH |
4256 | code = CODING_INHIBIT_CHARACTER_SUBSTITUTION; |
4257 | charset = CHARSET_FROM_ID (charset_ascii); | |
b73bfc1c | 4258 | } |
41cbe562 | 4259 | else |
0eecad43 | 4260 | { |
41cbe562 KH |
4261 | c = coding->default_char; |
4262 | charset = char_charset (c, charset_list, &code); | |
0eecad43 | 4263 | } |
4ed46869 | 4264 | } |
df7492f9 KH |
4265 | if (code == CHARSET_INVALID_CODE (charset)) |
4266 | abort (); | |
4267 | if (charset == charset_big5) | |
b73bfc1c | 4268 | { |
df7492f9 KH |
4269 | int c1, c2; |
4270 | ||
4271 | c1 = code >> 8, c2 = code & 0xFF; | |
4272 | EMIT_TWO_BYTES (c1, c2); | |
b73bfc1c | 4273 | } |
df7492f9 KH |
4274 | else |
4275 | EMIT_ONE_ASCII_BYTE (code & 0x7F); | |
4ed46869 | 4276 | } |
4ed46869 | 4277 | } |
df7492f9 KH |
4278 | coding->result = CODING_RESULT_SUCCESS; |
4279 | coding->produced_char += produced_chars; | |
4280 | coding->produced = dst - coding->destination; | |
4281 | return 0; | |
4ed46869 KH |
4282 | } |
4283 | ||
4284 | \f | |
df7492f9 | 4285 | /*** 10. CCL handlers ***/ |
1397dc18 KH |
4286 | |
4287 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
4288 | Check if a text is encoded in a coding system of which | |
4289 | encoder/decoder are written in CCL program. If it is, return | |
df7492f9 | 4290 | CATEGORY_MASK_CCL, else return 0. */ |
1397dc18 | 4291 | |
0a28aafb | 4292 | static int |
ff0dacd7 | 4293 | detect_coding_ccl (coding, detect_info) |
df7492f9 | 4294 | struct coding_system *coding; |
ff0dacd7 | 4295 | struct coding_detection_info *detect_info; |
1397dc18 | 4296 | { |
8f924df7 KH |
4297 | const unsigned char *src = coding->source, *src_base = src; |
4298 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
df7492f9 KH |
4299 | int multibytep = coding->src_multibyte; |
4300 | int consumed_chars = 0; | |
4301 | int found = 0; | |
4302 | unsigned char *valids = CODING_CCL_VALIDS (coding); | |
4303 | int head_ascii = coding->head_ascii; | |
4304 | Lisp_Object attrs; | |
4305 | ||
ff0dacd7 KH |
4306 | detect_info->checked |= CATEGORY_MASK_CCL; |
4307 | ||
df7492f9 KH |
4308 | coding = &coding_categories[coding_category_ccl]; |
4309 | attrs = CODING_ID_ATTRS (coding->id); | |
4310 | if (! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
4311 | src += head_ascii; | |
1397dc18 | 4312 | |
b73bfc1c | 4313 | while (1) |
1397dc18 | 4314 | { |
df7492f9 KH |
4315 | int c; |
4316 | ONE_MORE_BYTE (c); | |
4317 | if (! valids[c]) | |
4318 | break; | |
ff0dacd7 KH |
4319 | if ((valids[c] > 1)) |
4320 | found = CATEGORY_MASK_CCL; | |
df7492f9 | 4321 | } |
ff0dacd7 | 4322 | detect_info->rejected |= CATEGORY_MASK_CCL; |
df7492f9 KH |
4323 | return 0; |
4324 | ||
4325 | no_more_source: | |
ff0dacd7 KH |
4326 | detect_info->found |= found; |
4327 | return 1; | |
df7492f9 KH |
4328 | } |
4329 | ||
4330 | static void | |
4331 | decode_coding_ccl (coding) | |
4332 | struct coding_system *coding; | |
4333 | { | |
7c78e542 | 4334 | const unsigned char *src = coding->source + coding->consumed; |
8f924df7 | 4335 | const unsigned char *src_end = coding->source + coding->src_bytes; |
df7492f9 KH |
4336 | int *charbuf = coding->charbuf; |
4337 | int *charbuf_end = charbuf + coding->charbuf_size; | |
4338 | int consumed_chars = 0; | |
4339 | int multibytep = coding->src_multibyte; | |
4340 | struct ccl_program ccl; | |
4341 | int source_charbuf[1024]; | |
4342 | int source_byteidx[1024]; | |
4776e638 | 4343 | Lisp_Object attrs, eol_type, charset_list; |
df7492f9 | 4344 | |
8dcbea82 | 4345 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
df7492f9 KH |
4346 | setup_ccl_program (&ccl, CODING_CCL_DECODER (coding)); |
4347 | ||
4348 | while (src < src_end) | |
4349 | { | |
7c78e542 | 4350 | const unsigned char *p = src; |
df7492f9 KH |
4351 | int *source, *source_end; |
4352 | int i = 0; | |
4353 | ||
4354 | if (multibytep) | |
4355 | while (i < 1024 && p < src_end) | |
4356 | { | |
4357 | source_byteidx[i] = p - src; | |
4358 | source_charbuf[i++] = STRING_CHAR_ADVANCE (p); | |
4359 | } | |
4360 | else | |
4361 | while (i < 1024 && p < src_end) | |
4362 | source_charbuf[i++] = *p++; | |
8f924df7 | 4363 | |
df7492f9 KH |
4364 | if (p == src_end && coding->mode & CODING_MODE_LAST_BLOCK) |
4365 | ccl.last_block = 1; | |
4366 | ||
4367 | source = source_charbuf; | |
4368 | source_end = source + i; | |
4369 | while (source < source_end) | |
4370 | { | |
4371 | ccl_driver (&ccl, source, charbuf, | |
8dcbea82 KH |
4372 | source_end - source, charbuf_end - charbuf, |
4373 | charset_list); | |
df7492f9 KH |
4374 | source += ccl.consumed; |
4375 | charbuf += ccl.produced; | |
4376 | if (ccl.status != CCL_STAT_SUSPEND_BY_DST) | |
4377 | break; | |
4378 | } | |
4379 | if (source < source_end) | |
4380 | src += source_byteidx[source - source_charbuf]; | |
4381 | else | |
4382 | src = p; | |
4383 | consumed_chars += source - source_charbuf; | |
4384 | ||
4385 | if (ccl.status != CCL_STAT_SUSPEND_BY_SRC | |
4386 | && ccl.status != CODING_RESULT_INSUFFICIENT_SRC) | |
4387 | break; | |
4388 | } | |
4389 | ||
4390 | switch (ccl.status) | |
4391 | { | |
4392 | case CCL_STAT_SUSPEND_BY_SRC: | |
4393 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; | |
4394 | break; | |
4395 | case CCL_STAT_SUSPEND_BY_DST: | |
4396 | break; | |
4397 | case CCL_STAT_QUIT: | |
4398 | case CCL_STAT_INVALID_CMD: | |
4399 | coding->result = CODING_RESULT_INTERRUPT; | |
4400 | break; | |
4401 | default: | |
4402 | coding->result = CODING_RESULT_SUCCESS; | |
4403 | break; | |
4404 | } | |
4405 | coding->consumed_char += consumed_chars; | |
4406 | coding->consumed = src - coding->source; | |
4407 | coding->charbuf_used = charbuf - coding->charbuf; | |
4408 | } | |
4409 | ||
4410 | static int | |
4411 | encode_coding_ccl (coding) | |
4412 | struct coding_system *coding; | |
4413 | { | |
4414 | struct ccl_program ccl; | |
4415 | int multibytep = coding->dst_multibyte; | |
4416 | int *charbuf = coding->charbuf; | |
4417 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4418 | unsigned char *dst = coding->destination + coding->produced; | |
4419 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4420 | unsigned char *adjusted_dst_end = dst_end - 1; | |
4421 | int destination_charbuf[1024]; | |
4422 | int i, produced_chars = 0; | |
8dcbea82 | 4423 | Lisp_Object attrs, eol_type, charset_list; |
df7492f9 | 4424 | |
8dcbea82 | 4425 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
df7492f9 KH |
4426 | setup_ccl_program (&ccl, CODING_CCL_ENCODER (coding)); |
4427 | ||
4428 | ccl.last_block = coding->mode & CODING_MODE_LAST_BLOCK; | |
4429 | ccl.dst_multibyte = coding->dst_multibyte; | |
4430 | ||
4431 | while (charbuf < charbuf_end && dst < adjusted_dst_end) | |
4432 | { | |
4433 | int dst_bytes = dst_end - dst; | |
4434 | if (dst_bytes > 1024) | |
4435 | dst_bytes = 1024; | |
4436 | ||
4437 | ccl_driver (&ccl, charbuf, destination_charbuf, | |
8dcbea82 | 4438 | charbuf_end - charbuf, dst_bytes, charset_list); |
df7492f9 KH |
4439 | charbuf += ccl.consumed; |
4440 | if (multibytep) | |
4441 | for (i = 0; i < ccl.produced; i++) | |
4442 | EMIT_ONE_BYTE (destination_charbuf[i] & 0xFF); | |
4443 | else | |
4444 | { | |
4445 | for (i = 0; i < ccl.produced; i++) | |
4446 | *dst++ = destination_charbuf[i] & 0xFF; | |
4447 | produced_chars += ccl.produced; | |
4448 | } | |
4449 | } | |
4450 | ||
4451 | switch (ccl.status) | |
4452 | { | |
4453 | case CCL_STAT_SUSPEND_BY_SRC: | |
4454 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; | |
4455 | break; | |
4456 | case CCL_STAT_SUSPEND_BY_DST: | |
4457 | coding->result = CODING_RESULT_INSUFFICIENT_DST; | |
4458 | break; | |
4459 | case CCL_STAT_QUIT: | |
4460 | case CCL_STAT_INVALID_CMD: | |
4461 | coding->result = CODING_RESULT_INTERRUPT; | |
4462 | break; | |
4463 | default: | |
4464 | coding->result = CODING_RESULT_SUCCESS; | |
4465 | break; | |
1397dc18 | 4466 | } |
df7492f9 KH |
4467 | |
4468 | coding->produced_char += produced_chars; | |
4469 | coding->produced = dst - coding->destination; | |
4470 | return 0; | |
1397dc18 KH |
4471 | } |
4472 | ||
df7492f9 | 4473 | |
1397dc18 | 4474 | \f |
df7492f9 | 4475 | /*** 10, 11. no-conversion handlers ***/ |
4ed46869 | 4476 | |
b73bfc1c | 4477 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
4ed46869 | 4478 | |
b73bfc1c | 4479 | static void |
df7492f9 | 4480 | decode_coding_raw_text (coding) |
4ed46869 | 4481 | struct coding_system *coding; |
4ed46869 | 4482 | { |
df7492f9 | 4483 | coding->chars_at_source = 1; |
2c78b7e1 KH |
4484 | coding->consumed_char = 0; |
4485 | coding->consumed = 0; | |
df7492f9 KH |
4486 | coding->result = CODING_RESULT_SUCCESS; |
4487 | } | |
4ed46869 | 4488 | |
df7492f9 KH |
4489 | static int |
4490 | encode_coding_raw_text (coding) | |
4491 | struct coding_system *coding; | |
4492 | { | |
4493 | int multibytep = coding->dst_multibyte; | |
4494 | int *charbuf = coding->charbuf; | |
4495 | int *charbuf_end = coding->charbuf + coding->charbuf_used; | |
4496 | unsigned char *dst = coding->destination + coding->produced; | |
4497 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4498 | int produced_chars = 0; | |
b73bfc1c KH |
4499 | int c; |
4500 | ||
df7492f9 | 4501 | if (multibytep) |
b73bfc1c | 4502 | { |
df7492f9 | 4503 | int safe_room = MAX_MULTIBYTE_LENGTH * 2; |
4ed46869 | 4504 | |
df7492f9 KH |
4505 | if (coding->src_multibyte) |
4506 | while (charbuf < charbuf_end) | |
4507 | { | |
4508 | ASSURE_DESTINATION (safe_room); | |
4509 | c = *charbuf++; | |
4510 | if (ASCII_CHAR_P (c)) | |
4511 | EMIT_ONE_ASCII_BYTE (c); | |
4512 | else if (CHAR_BYTE8_P (c)) | |
4513 | { | |
4514 | c = CHAR_TO_BYTE8 (c); | |
4515 | EMIT_ONE_BYTE (c); | |
4516 | } | |
4517 | else | |
4518 | { | |
4519 | unsigned char str[MAX_MULTIBYTE_LENGTH], *p0 = str, *p1 = str; | |
93dec019 | 4520 | |
df7492f9 KH |
4521 | CHAR_STRING_ADVANCE (c, p1); |
4522 | while (p0 < p1) | |
9d123124 KH |
4523 | { |
4524 | EMIT_ONE_BYTE (*p0); | |
4525 | p0++; | |
4526 | } | |
df7492f9 KH |
4527 | } |
4528 | } | |
b73bfc1c | 4529 | else |
df7492f9 KH |
4530 | while (charbuf < charbuf_end) |
4531 | { | |
4532 | ASSURE_DESTINATION (safe_room); | |
4533 | c = *charbuf++; | |
4534 | EMIT_ONE_BYTE (c); | |
4535 | } | |
4536 | } | |
4537 | else | |
4ed46869 | 4538 | { |
df7492f9 | 4539 | if (coding->src_multibyte) |
d46c5b12 | 4540 | { |
df7492f9 KH |
4541 | int safe_room = MAX_MULTIBYTE_LENGTH; |
4542 | ||
4543 | while (charbuf < charbuf_end) | |
d46c5b12 | 4544 | { |
df7492f9 KH |
4545 | ASSURE_DESTINATION (safe_room); |
4546 | c = *charbuf++; | |
4547 | if (ASCII_CHAR_P (c)) | |
4548 | *dst++ = c; | |
4549 | else if (CHAR_BYTE8_P (c)) | |
4550 | *dst++ = CHAR_TO_BYTE8 (c); | |
b73bfc1c | 4551 | else |
df7492f9 KH |
4552 | CHAR_STRING_ADVANCE (c, dst); |
4553 | produced_chars++; | |
d46c5b12 KH |
4554 | } |
4555 | } | |
df7492f9 KH |
4556 | else |
4557 | { | |
4558 | ASSURE_DESTINATION (charbuf_end - charbuf); | |
4559 | while (charbuf < charbuf_end && dst < dst_end) | |
4560 | *dst++ = *charbuf++; | |
4561 | produced_chars = dst - (coding->destination + coding->dst_bytes); | |
8f924df7 | 4562 | } |
4ed46869 | 4563 | } |
df7492f9 KH |
4564 | coding->result = CODING_RESULT_SUCCESS; |
4565 | coding->produced_char += produced_chars; | |
4566 | coding->produced = dst - coding->destination; | |
4567 | return 0; | |
4ed46869 KH |
4568 | } |
4569 | ||
ff0dacd7 KH |
4570 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
4571 | Check if a text is encoded in a charset-based coding system. If it | |
4572 | is, return 1, else return 0. */ | |
4573 | ||
0a28aafb | 4574 | static int |
ff0dacd7 | 4575 | detect_coding_charset (coding, detect_info) |
df7492f9 | 4576 | struct coding_system *coding; |
ff0dacd7 | 4577 | struct coding_detection_info *detect_info; |
1397dc18 | 4578 | { |
8f924df7 KH |
4579 | const unsigned char *src = coding->source, *src_base = src; |
4580 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
df7492f9 KH |
4581 | int multibytep = coding->src_multibyte; |
4582 | int consumed_chars = 0; | |
4583 | Lisp_Object attrs, valids; | |
584948ac | 4584 | int found = 0; |
1397dc18 | 4585 | |
ff0dacd7 KH |
4586 | detect_info->checked |= CATEGORY_MASK_CHARSET; |
4587 | ||
df7492f9 KH |
4588 | coding = &coding_categories[coding_category_charset]; |
4589 | attrs = CODING_ID_ATTRS (coding->id); | |
4590 | valids = AREF (attrs, coding_attr_charset_valids); | |
4591 | ||
4592 | if (! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
4593 | src += coding->head_ascii; | |
1397dc18 | 4594 | |
b73bfc1c | 4595 | while (1) |
1397dc18 | 4596 | { |
df7492f9 | 4597 | int c; |
1397dc18 | 4598 | |
df7492f9 KH |
4599 | ONE_MORE_BYTE (c); |
4600 | if (NILP (AREF (valids, c))) | |
4601 | break; | |
584948ac | 4602 | if (c >= 0x80) |
ff0dacd7 | 4603 | found = CATEGORY_MASK_CHARSET; |
df7492f9 | 4604 | } |
ff0dacd7 | 4605 | detect_info->rejected |= CATEGORY_MASK_CHARSET; |
df7492f9 | 4606 | return 0; |
4ed46869 | 4607 | |
df7492f9 | 4608 | no_more_source: |
ff0dacd7 KH |
4609 | detect_info->found |= found; |
4610 | return 1; | |
df7492f9 | 4611 | } |
b73bfc1c | 4612 | |
b73bfc1c | 4613 | static void |
df7492f9 | 4614 | decode_coding_charset (coding) |
4ed46869 | 4615 | struct coding_system *coding; |
4ed46869 | 4616 | { |
8f924df7 KH |
4617 | const unsigned char *src = coding->source + coding->consumed; |
4618 | const unsigned char *src_end = coding->source + coding->src_bytes; | |
4619 | const unsigned char *src_base; | |
df7492f9 | 4620 | int *charbuf = coding->charbuf; |
ff0dacd7 | 4621 | int *charbuf_end = charbuf + coding->charbuf_size - MAX_ANNOTATION_LENGTH; |
df7492f9 KH |
4622 | int consumed_chars = 0, consumed_chars_base; |
4623 | int multibytep = coding->src_multibyte; | |
4eb6d3f1 | 4624 | Lisp_Object attrs, eol_type, charset_list, valids; |
ff0dacd7 KH |
4625 | int char_offset = coding->produced_char; |
4626 | int last_offset = char_offset; | |
4627 | int last_id = charset_ascii; | |
df7492f9 KH |
4628 | |
4629 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
4eb6d3f1 | 4630 | valids = AREF (attrs, coding_attr_charset_valids); |
b73bfc1c | 4631 | |
df7492f9 | 4632 | while (1) |
4ed46869 | 4633 | { |
4eb6d3f1 | 4634 | int c; |
df7492f9 KH |
4635 | |
4636 | src_base = src; | |
4637 | consumed_chars_base = consumed_chars; | |
b73bfc1c | 4638 | |
df7492f9 KH |
4639 | if (charbuf >= charbuf_end) |
4640 | break; | |
4641 | ||
4eb6d3f1 | 4642 | ONE_MORE_BYTE (c); |
df7492f9 | 4643 | if (c == '\r') |
d46c5b12 | 4644 | { |
c7c66a95 KH |
4645 | /* Here we assume that no charset maps '\r' to something |
4646 | else. */ | |
df7492f9 | 4647 | if (EQ (eol_type, Qdos)) |
b73bfc1c | 4648 | { |
98725083 | 4649 | if (src == src_end) |
b73bfc1c | 4650 | { |
98725083 KH |
4651 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; |
4652 | goto no_more_source; | |
b73bfc1c | 4653 | } |
98725083 | 4654 | if (*src == '\n') |
df7492f9 | 4655 | ONE_MORE_BYTE (c); |
b73bfc1c | 4656 | } |
df7492f9 | 4657 | else if (EQ (eol_type, Qmac)) |
b73bfc1c | 4658 | c = '\n'; |
d46c5b12 | 4659 | } |
df7492f9 | 4660 | else |
d46c5b12 | 4661 | { |
4eb6d3f1 KH |
4662 | Lisp_Object val; |
4663 | struct charset *charset; | |
c7c66a95 | 4664 | int dim; |
acb2a965 KH |
4665 | int len = 1; |
4666 | unsigned code = c; | |
4eb6d3f1 KH |
4667 | |
4668 | val = AREF (valids, c); | |
4669 | if (NILP (val)) | |
4670 | goto invalid_code; | |
c7c66a95 | 4671 | if (INTEGERP (val)) |
4eb6d3f1 | 4672 | { |
c7c66a95 KH |
4673 | charset = CHARSET_FROM_ID (XFASTINT (val)); |
4674 | dim = CHARSET_DIMENSION (charset); | |
f9d71dcd | 4675 | while (len < dim) |
4eb6d3f1 | 4676 | { |
acb2a965 KH |
4677 | ONE_MORE_BYTE (c); |
4678 | code = (code << 8) | c; | |
f9d71dcd | 4679 | len++; |
4eb6d3f1 | 4680 | } |
c7c66a95 KH |
4681 | CODING_DECODE_CHAR (coding, src, src_base, src_end, |
4682 | charset, code, c); | |
4683 | } | |
4684 | else | |
4685 | { | |
4686 | /* VAL is a list of charset IDs. It is assured that the | |
4687 | list is sorted by charset dimensions (smaller one | |
4688 | comes first). */ | |
c7c66a95 KH |
4689 | while (CONSP (val)) |
4690 | { | |
4691 | charset = CHARSET_FROM_ID (XFASTINT (XCAR (val))); | |
4692 | dim = CHARSET_DIMENSION (charset); | |
f9d71dcd | 4693 | while (len < dim) |
c7c66a95 | 4694 | { |
acb2a965 KH |
4695 | ONE_MORE_BYTE (c); |
4696 | code = (code << 8) | c; | |
f9d71dcd | 4697 | len++; |
c7c66a95 | 4698 | } |
c7c66a95 KH |
4699 | CODING_DECODE_CHAR (coding, src, src_base, |
4700 | src_end, charset, code, c); | |
4701 | if (c >= 0) | |
4702 | break; | |
4703 | val = XCDR (val); | |
4704 | } | |
4eb6d3f1 | 4705 | } |
df7492f9 KH |
4706 | if (c < 0) |
4707 | goto invalid_code; | |
ff0dacd7 KH |
4708 | if (charset->id != charset_ascii |
4709 | && last_id != charset->id) | |
4710 | { | |
4711 | if (last_id != charset_ascii) | |
4712 | ADD_CHARSET_DATA (charbuf, last_offset, char_offset, last_id); | |
4713 | last_id = charset->id; | |
4714 | last_offset = char_offset; | |
4715 | } | |
d46c5b12 | 4716 | } |
df7492f9 | 4717 | *charbuf++ = c; |
ff0dacd7 | 4718 | char_offset++; |
df7492f9 KH |
4719 | continue; |
4720 | ||
4721 | invalid_code: | |
4722 | src = src_base; | |
4723 | consumed_chars = consumed_chars_base; | |
4724 | ONE_MORE_BYTE (c); | |
4725 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
ff0dacd7 | 4726 | char_offset++; |
df7492f9 | 4727 | coding->errors++; |
4ed46869 KH |
4728 | } |
4729 | ||
df7492f9 | 4730 | no_more_source: |
ff0dacd7 KH |
4731 | if (last_id != charset_ascii) |
4732 | ADD_CHARSET_DATA (charbuf, last_offset, char_offset, last_id); | |
df7492f9 KH |
4733 | coding->consumed_char += consumed_chars_base; |
4734 | coding->consumed = src_base - coding->source; | |
4735 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
4736 | } |
4737 | ||
df7492f9 KH |
4738 | static int |
4739 | encode_coding_charset (coding) | |
4ed46869 | 4740 | struct coding_system *coding; |
4ed46869 | 4741 | { |
df7492f9 KH |
4742 | int multibytep = coding->dst_multibyte; |
4743 | int *charbuf = coding->charbuf; | |
4744 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4745 | unsigned char *dst = coding->destination + coding->produced; | |
4746 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4747 | int safe_room = MAX_MULTIBYTE_LENGTH; | |
4748 | int produced_chars = 0; | |
df7492f9 KH |
4749 | Lisp_Object attrs, eol_type, charset_list; |
4750 | int ascii_compatible; | |
b73bfc1c | 4751 | int c; |
b73bfc1c | 4752 | |
df7492f9 | 4753 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
df7492f9 | 4754 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); |
fb88bf2d | 4755 | |
df7492f9 | 4756 | while (charbuf < charbuf_end) |
4ed46869 | 4757 | { |
4eb6d3f1 | 4758 | struct charset *charset; |
df7492f9 | 4759 | unsigned code; |
8f924df7 | 4760 | |
df7492f9 KH |
4761 | ASSURE_DESTINATION (safe_room); |
4762 | c = *charbuf++; | |
4763 | if (ascii_compatible && ASCII_CHAR_P (c)) | |
4764 | EMIT_ONE_ASCII_BYTE (c); | |
16eafb5d | 4765 | else if (CHAR_BYTE8_P (c)) |
4ed46869 | 4766 | { |
16eafb5d KH |
4767 | c = CHAR_TO_BYTE8 (c); |
4768 | EMIT_ONE_BYTE (c); | |
d46c5b12 | 4769 | } |
d46c5b12 | 4770 | else |
b73bfc1c | 4771 | { |
4eb6d3f1 KH |
4772 | charset = char_charset (c, charset_list, &code); |
4773 | if (charset) | |
4774 | { | |
4775 | if (CHARSET_DIMENSION (charset) == 1) | |
4776 | EMIT_ONE_BYTE (code); | |
4777 | else if (CHARSET_DIMENSION (charset) == 2) | |
4778 | EMIT_TWO_BYTES (code >> 8, code & 0xFF); | |
4779 | else if (CHARSET_DIMENSION (charset) == 3) | |
4780 | EMIT_THREE_BYTES (code >> 16, (code >> 8) & 0xFF, code & 0xFF); | |
4781 | else | |
4782 | EMIT_FOUR_BYTES (code >> 24, (code >> 16) & 0xFF, | |
4783 | (code >> 8) & 0xFF, code & 0xFF); | |
4784 | } | |
4785 | else | |
41cbe562 KH |
4786 | { |
4787 | if (coding->mode & CODING_MODE_SAFE_ENCODING) | |
4788 | c = CODING_INHIBIT_CHARACTER_SUBSTITUTION; | |
4789 | else | |
4790 | c = coding->default_char; | |
4791 | EMIT_ONE_BYTE (c); | |
4792 | } | |
4ed46869 | 4793 | } |
4ed46869 KH |
4794 | } |
4795 | ||
df7492f9 KH |
4796 | coding->result = CODING_RESULT_SUCCESS; |
4797 | coding->produced_char += produced_chars; | |
4798 | coding->produced = dst - coding->destination; | |
4799 | return 0; | |
4ed46869 KH |
4800 | } |
4801 | ||
4802 | \f | |
1397dc18 | 4803 | /*** 7. C library functions ***/ |
4ed46869 | 4804 | |
df7492f9 KH |
4805 | /* Setup coding context CODING from information about CODING_SYSTEM. |
4806 | If CODING_SYSTEM is nil, `no-conversion' is assumed. If | |
4807 | CODING_SYSTEM is invalid, signal an error. */ | |
4ed46869 | 4808 | |
ec6d2bb8 | 4809 | void |
e0e989f6 KH |
4810 | setup_coding_system (coding_system, coding) |
4811 | Lisp_Object coding_system; | |
4ed46869 KH |
4812 | struct coding_system *coding; |
4813 | { | |
df7492f9 KH |
4814 | Lisp_Object attrs; |
4815 | Lisp_Object eol_type; | |
4816 | Lisp_Object coding_type; | |
4608c386 | 4817 | Lisp_Object val; |
4ed46869 | 4818 | |
df7492f9 KH |
4819 | if (NILP (coding_system)) |
4820 | coding_system = Qno_conversion; | |
c07c8e12 | 4821 | |
df7492f9 | 4822 | CHECK_CODING_SYSTEM_GET_ID (coding_system, coding->id); |
1f5dbf34 | 4823 | |
df7492f9 KH |
4824 | attrs = CODING_ID_ATTRS (coding->id); |
4825 | eol_type = CODING_ID_EOL_TYPE (coding->id); | |
1f5dbf34 | 4826 | |
df7492f9 KH |
4827 | coding->mode = 0; |
4828 | coding->head_ascii = -1; | |
4829 | coding->common_flags | |
4830 | = (VECTORP (eol_type) ? CODING_REQUIRE_DETECTION_MASK : 0); | |
5e5c78be KH |
4831 | if (! NILP (CODING_ATTR_POST_READ (attrs))) |
4832 | coding->common_flags |= CODING_REQUIRE_DECODING_MASK; | |
4833 | if (! NILP (CODING_ATTR_PRE_WRITE (attrs))) | |
4834 | coding->common_flags |= CODING_REQUIRE_ENCODING_MASK; | |
8f924df7 KH |
4835 | if (! NILP (CODING_ATTR_FOR_UNIBYTE (attrs))) |
4836 | coding->common_flags |= CODING_FOR_UNIBYTE_MASK; | |
1f5dbf34 | 4837 | |
df7492f9 | 4838 | val = CODING_ATTR_SAFE_CHARSETS (attrs); |
8f924df7 KH |
4839 | coding->max_charset_id = SCHARS (val) - 1; |
4840 | coding->safe_charsets = (char *) SDATA (val); | |
df7492f9 | 4841 | coding->default_char = XINT (CODING_ATTR_DEFAULT_CHAR (attrs)); |
4608c386 | 4842 | |
df7492f9 KH |
4843 | coding_type = CODING_ATTR_TYPE (attrs); |
4844 | if (EQ (coding_type, Qundecided)) | |
d46c5b12 | 4845 | { |
df7492f9 KH |
4846 | coding->detector = NULL; |
4847 | coding->decoder = decode_coding_raw_text; | |
4848 | coding->encoder = encode_coding_raw_text; | |
4849 | coding->common_flags |= CODING_REQUIRE_DETECTION_MASK; | |
d46c5b12 | 4850 | } |
df7492f9 | 4851 | else if (EQ (coding_type, Qiso_2022)) |
d46c5b12 | 4852 | { |
df7492f9 KH |
4853 | int i; |
4854 | int flags = XINT (AREF (attrs, coding_attr_iso_flags)); | |
4855 | ||
4856 | /* Invoke graphic register 0 to plane 0. */ | |
4857 | CODING_ISO_INVOCATION (coding, 0) = 0; | |
4858 | /* Invoke graphic register 1 to plane 1 if we can use 8-bit. */ | |
4859 | CODING_ISO_INVOCATION (coding, 1) | |
4860 | = (flags & CODING_ISO_FLAG_SEVEN_BITS ? -1 : 1); | |
4861 | /* Setup the initial status of designation. */ | |
4862 | for (i = 0; i < 4; i++) | |
4863 | CODING_ISO_DESIGNATION (coding, i) = CODING_ISO_INITIAL (coding, i); | |
4864 | /* Not single shifting initially. */ | |
4865 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; | |
4866 | /* Beginning of buffer should also be regarded as bol. */ | |
4867 | CODING_ISO_BOL (coding) = 1; | |
4868 | coding->detector = detect_coding_iso_2022; | |
4869 | coding->decoder = decode_coding_iso_2022; | |
4870 | coding->encoder = encode_coding_iso_2022; | |
4871 | if (flags & CODING_ISO_FLAG_SAFE) | |
4872 | coding->mode |= CODING_MODE_SAFE_ENCODING; | |
d46c5b12 | 4873 | coding->common_flags |
df7492f9 KH |
4874 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK |
4875 | | CODING_REQUIRE_FLUSHING_MASK); | |
4876 | if (flags & CODING_ISO_FLAG_COMPOSITION) | |
4877 | coding->common_flags |= CODING_ANNOTATE_COMPOSITION_MASK; | |
ff0dacd7 KH |
4878 | if (flags & CODING_ISO_FLAG_DESIGNATION) |
4879 | coding->common_flags |= CODING_ANNOTATE_CHARSET_MASK; | |
df7492f9 KH |
4880 | if (flags & CODING_ISO_FLAG_FULL_SUPPORT) |
4881 | { | |
4882 | setup_iso_safe_charsets (attrs); | |
4883 | val = CODING_ATTR_SAFE_CHARSETS (attrs); | |
8f924df7 KH |
4884 | coding->max_charset_id = SCHARS (val) - 1; |
4885 | coding->safe_charsets = (char *) SDATA (val); | |
df7492f9 KH |
4886 | } |
4887 | CODING_ISO_FLAGS (coding) = flags; | |
d46c5b12 | 4888 | } |
df7492f9 | 4889 | else if (EQ (coding_type, Qcharset)) |
d46c5b12 | 4890 | { |
df7492f9 KH |
4891 | coding->detector = detect_coding_charset; |
4892 | coding->decoder = decode_coding_charset; | |
4893 | coding->encoder = encode_coding_charset; | |
d46c5b12 | 4894 | coding->common_flags |
df7492f9 | 4895 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); |
d46c5b12 | 4896 | } |
df7492f9 | 4897 | else if (EQ (coding_type, Qutf_8)) |
d46c5b12 | 4898 | { |
df7492f9 KH |
4899 | coding->detector = detect_coding_utf_8; |
4900 | coding->decoder = decode_coding_utf_8; | |
4901 | coding->encoder = encode_coding_utf_8; | |
4902 | coding->common_flags | |
4903 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
4904 | } | |
4905 | else if (EQ (coding_type, Qutf_16)) | |
4906 | { | |
4907 | val = AREF (attrs, coding_attr_utf_16_bom); | |
4908 | CODING_UTF_16_BOM (coding) = (CONSP (val) ? utf_16_detect_bom | |
4909 | : EQ (val, Qt) ? utf_16_with_bom | |
4910 | : utf_16_without_bom); | |
4911 | val = AREF (attrs, coding_attr_utf_16_endian); | |
b49a1807 | 4912 | CODING_UTF_16_ENDIAN (coding) = (EQ (val, Qbig) ? utf_16_big_endian |
df7492f9 | 4913 | : utf_16_little_endian); |
e19c3639 | 4914 | CODING_UTF_16_SURROGATE (coding) = 0; |
df7492f9 KH |
4915 | coding->detector = detect_coding_utf_16; |
4916 | coding->decoder = decode_coding_utf_16; | |
4917 | coding->encoder = encode_coding_utf_16; | |
4918 | coding->common_flags | |
4919 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
b49a1807 KH |
4920 | if (CODING_UTF_16_BOM (coding) == utf_16_detect_bom) |
4921 | coding->common_flags |= CODING_REQUIRE_DETECTION_MASK; | |
d46c5b12 | 4922 | } |
df7492f9 | 4923 | else if (EQ (coding_type, Qccl)) |
4ed46869 | 4924 | { |
df7492f9 KH |
4925 | coding->detector = detect_coding_ccl; |
4926 | coding->decoder = decode_coding_ccl; | |
4927 | coding->encoder = encode_coding_ccl; | |
c952af22 | 4928 | coding->common_flags |
df7492f9 KH |
4929 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK |
4930 | | CODING_REQUIRE_FLUSHING_MASK); | |
4931 | } | |
4932 | else if (EQ (coding_type, Qemacs_mule)) | |
4933 | { | |
4934 | coding->detector = detect_coding_emacs_mule; | |
4935 | coding->decoder = decode_coding_emacs_mule; | |
4936 | coding->encoder = encode_coding_emacs_mule; | |
c952af22 | 4937 | coding->common_flags |
df7492f9 KH |
4938 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); |
4939 | if (! NILP (AREF (attrs, coding_attr_emacs_mule_full)) | |
4940 | && ! EQ (CODING_ATTR_CHARSET_LIST (attrs), Vemacs_mule_charset_list)) | |
4941 | { | |
4942 | Lisp_Object tail, safe_charsets; | |
4943 | int max_charset_id = 0; | |
4944 | ||
4945 | for (tail = Vemacs_mule_charset_list; CONSP (tail); | |
4946 | tail = XCDR (tail)) | |
4947 | if (max_charset_id < XFASTINT (XCAR (tail))) | |
4948 | max_charset_id = XFASTINT (XCAR (tail)); | |
4949 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), | |
4950 | make_number (255)); | |
4951 | for (tail = Vemacs_mule_charset_list; CONSP (tail); | |
4952 | tail = XCDR (tail)) | |
8f924df7 | 4953 | SSET (safe_charsets, XFASTINT (XCAR (tail)), 0); |
df7492f9 | 4954 | coding->max_charset_id = max_charset_id; |
8f924df7 | 4955 | coding->safe_charsets = (char *) SDATA (safe_charsets); |
df7492f9 KH |
4956 | } |
4957 | } | |
4958 | else if (EQ (coding_type, Qshift_jis)) | |
4959 | { | |
4960 | coding->detector = detect_coding_sjis; | |
4961 | coding->decoder = decode_coding_sjis; | |
4962 | coding->encoder = encode_coding_sjis; | |
c952af22 | 4963 | coding->common_flags |
df7492f9 KH |
4964 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); |
4965 | } | |
4966 | else if (EQ (coding_type, Qbig5)) | |
4967 | { | |
4968 | coding->detector = detect_coding_big5; | |
4969 | coding->decoder = decode_coding_big5; | |
4970 | coding->encoder = encode_coding_big5; | |
c952af22 | 4971 | coding->common_flags |
df7492f9 KH |
4972 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); |
4973 | } | |
4974 | else /* EQ (coding_type, Qraw_text) */ | |
ec6d2bb8 | 4975 | { |
df7492f9 KH |
4976 | coding->detector = NULL; |
4977 | coding->decoder = decode_coding_raw_text; | |
4978 | coding->encoder = encode_coding_raw_text; | |
4ed46869 | 4979 | } |
4ed46869 | 4980 | |
df7492f9 | 4981 | return; |
4ed46869 KH |
4982 | } |
4983 | ||
df7492f9 KH |
4984 | /* Return raw-text or one of its subsidiaries that has the same |
4985 | eol_type as CODING-SYSTEM. */ | |
ec6d2bb8 | 4986 | |
df7492f9 KH |
4987 | Lisp_Object |
4988 | raw_text_coding_system (coding_system) | |
4989 | Lisp_Object coding_system; | |
ec6d2bb8 | 4990 | { |
0be8721c | 4991 | Lisp_Object spec, attrs; |
df7492f9 | 4992 | Lisp_Object eol_type, raw_text_eol_type; |
ec6d2bb8 | 4993 | |
d3e4cb56 KH |
4994 | if (NILP (coding_system)) |
4995 | return Qraw_text; | |
df7492f9 KH |
4996 | spec = CODING_SYSTEM_SPEC (coding_system); |
4997 | attrs = AREF (spec, 0); | |
ec6d2bb8 | 4998 | |
df7492f9 KH |
4999 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) |
5000 | return coding_system; | |
ec6d2bb8 | 5001 | |
df7492f9 KH |
5002 | eol_type = AREF (spec, 2); |
5003 | if (VECTORP (eol_type)) | |
5004 | return Qraw_text; | |
5005 | spec = CODING_SYSTEM_SPEC (Qraw_text); | |
5006 | raw_text_eol_type = AREF (spec, 2); | |
5007 | return (EQ (eol_type, Qunix) ? AREF (raw_text_eol_type, 0) | |
5008 | : EQ (eol_type, Qdos) ? AREF (raw_text_eol_type, 1) | |
5009 | : AREF (raw_text_eol_type, 2)); | |
ec6d2bb8 KH |
5010 | } |
5011 | ||
54f78171 | 5012 | |
df7492f9 KH |
5013 | /* If CODING_SYSTEM doesn't specify end-of-line format but PARENT |
5014 | does, return one of the subsidiary that has the same eol-spec as | |
5015 | PARENT. Otherwise, return CODING_SYSTEM. */ | |
5016 | ||
5017 | Lisp_Object | |
5018 | coding_inherit_eol_type (coding_system, parent) | |
b74e4686 | 5019 | Lisp_Object coding_system, parent; |
54f78171 | 5020 | { |
df7492f9 | 5021 | Lisp_Object spec, attrs, eol_type; |
54f78171 | 5022 | |
d3e4cb56 KH |
5023 | if (NILP (coding_system)) |
5024 | coding_system = Qraw_text; | |
df7492f9 KH |
5025 | spec = CODING_SYSTEM_SPEC (coding_system); |
5026 | attrs = AREF (spec, 0); | |
5027 | eol_type = AREF (spec, 2); | |
d3e4cb56 KH |
5028 | if (VECTORP (eol_type) |
5029 | && ! NILP (parent)) | |
df7492f9 KH |
5030 | { |
5031 | Lisp_Object parent_spec; | |
df7492f9 KH |
5032 | Lisp_Object parent_eol_type; |
5033 | ||
5034 | parent_spec | |
5035 | = CODING_SYSTEM_SPEC (buffer_defaults.buffer_file_coding_system); | |
5036 | parent_eol_type = AREF (parent_spec, 2); | |
5037 | if (EQ (parent_eol_type, Qunix)) | |
5038 | coding_system = AREF (eol_type, 0); | |
5039 | else if (EQ (parent_eol_type, Qdos)) | |
5040 | coding_system = AREF (eol_type, 1); | |
5041 | else if (EQ (parent_eol_type, Qmac)) | |
5042 | coding_system = AREF (eol_type, 2); | |
54f78171 | 5043 | } |
df7492f9 | 5044 | return coding_system; |
54f78171 KH |
5045 | } |
5046 | ||
4ed46869 KH |
5047 | /* Emacs has a mechanism to automatically detect a coding system if it |
5048 | is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But, | |
5049 | it's impossible to distinguish some coding systems accurately | |
5050 | because they use the same range of codes. So, at first, coding | |
5051 | systems are categorized into 7, those are: | |
5052 | ||
0ef69138 | 5053 | o coding-category-emacs-mule |
4ed46869 KH |
5054 | |
5055 | The category for a coding system which has the same code range | |
5056 | as Emacs' internal format. Assigned the coding-system (Lisp | |
0ef69138 | 5057 | symbol) `emacs-mule' by default. |
4ed46869 KH |
5058 | |
5059 | o coding-category-sjis | |
5060 | ||
5061 | The category for a coding system which has the same code range | |
5062 | as SJIS. Assigned the coding-system (Lisp | |
7717c392 | 5063 | symbol) `japanese-shift-jis' by default. |
4ed46869 KH |
5064 | |
5065 | o coding-category-iso-7 | |
5066 | ||
5067 | The category for a coding system which has the same code range | |
7717c392 | 5068 | as ISO2022 of 7-bit environment. This doesn't use any locking |
d46c5b12 KH |
5069 | shift and single shift functions. This can encode/decode all |
5070 | charsets. Assigned the coding-system (Lisp symbol) | |
5071 | `iso-2022-7bit' by default. | |
5072 | ||
5073 | o coding-category-iso-7-tight | |
5074 | ||
5075 | Same as coding-category-iso-7 except that this can | |
5076 | encode/decode only the specified charsets. | |
4ed46869 KH |
5077 | |
5078 | o coding-category-iso-8-1 | |
5079 | ||
5080 | The category for a coding system which has the same code range | |
5081 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
5082 | for DIMENSION1 charset. This doesn't use any locking shift |
5083 | and single shift functions. Assigned the coding-system (Lisp | |
5084 | symbol) `iso-latin-1' by default. | |
4ed46869 KH |
5085 | |
5086 | o coding-category-iso-8-2 | |
5087 | ||
5088 | The category for a coding system which has the same code range | |
5089 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
5090 | for DIMENSION2 charset. This doesn't use any locking shift |
5091 | and single shift functions. Assigned the coding-system (Lisp | |
5092 | symbol) `japanese-iso-8bit' by default. | |
4ed46869 | 5093 | |
7717c392 | 5094 | o coding-category-iso-7-else |
4ed46869 KH |
5095 | |
5096 | The category for a coding system which has the same code range | |
df7492f9 | 5097 | as ISO2022 of 7-bit environemnt but uses locking shift or |
7717c392 KH |
5098 | single shift functions. Assigned the coding-system (Lisp |
5099 | symbol) `iso-2022-7bit-lock' by default. | |
5100 | ||
5101 | o coding-category-iso-8-else | |
5102 | ||
5103 | The category for a coding system which has the same code range | |
df7492f9 | 5104 | as ISO2022 of 8-bit environemnt but uses locking shift or |
7717c392 KH |
5105 | single shift functions. Assigned the coding-system (Lisp |
5106 | symbol) `iso-2022-8bit-ss2' by default. | |
4ed46869 KH |
5107 | |
5108 | o coding-category-big5 | |
5109 | ||
5110 | The category for a coding system which has the same code range | |
5111 | as BIG5. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 5112 | `cn-big5' by default. |
4ed46869 | 5113 | |
fa42c37f KH |
5114 | o coding-category-utf-8 |
5115 | ||
5116 | The category for a coding system which has the same code range | |
5117 | as UTF-8 (cf. RFC2279). Assigned the coding-system (Lisp | |
5118 | symbol) `utf-8' by default. | |
5119 | ||
5120 | o coding-category-utf-16-be | |
5121 | ||
5122 | The category for a coding system in which a text has an | |
5123 | Unicode signature (cf. Unicode Standard) in the order of BIG | |
5124 | endian at the head. Assigned the coding-system (Lisp symbol) | |
5125 | `utf-16-be' by default. | |
5126 | ||
5127 | o coding-category-utf-16-le | |
5128 | ||
5129 | The category for a coding system in which a text has an | |
5130 | Unicode signature (cf. Unicode Standard) in the order of | |
5131 | LITTLE endian at the head. Assigned the coding-system (Lisp | |
5132 | symbol) `utf-16-le' by default. | |
5133 | ||
1397dc18 KH |
5134 | o coding-category-ccl |
5135 | ||
5136 | The category for a coding system of which encoder/decoder is | |
5137 | written in CCL programs. The default value is nil, i.e., no | |
5138 | coding system is assigned. | |
5139 | ||
4ed46869 KH |
5140 | o coding-category-binary |
5141 | ||
5142 | The category for a coding system not categorized in any of the | |
5143 | above. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 5144 | `no-conversion' by default. |
4ed46869 KH |
5145 | |
5146 | Each of them is a Lisp symbol and the value is an actual | |
df7492f9 | 5147 | `coding-system's (this is also a Lisp symbol) assigned by a user. |
4ed46869 KH |
5148 | What Emacs does actually is to detect a category of coding system. |
5149 | Then, it uses a `coding-system' assigned to it. If Emacs can't | |
df7492f9 | 5150 | decide only one possible category, it selects a category of the |
4ed46869 KH |
5151 | highest priority. Priorities of categories are also specified by a |
5152 | user in a Lisp variable `coding-category-list'. | |
5153 | ||
5154 | */ | |
5155 | ||
df7492f9 KH |
5156 | #define EOL_SEEN_NONE 0 |
5157 | #define EOL_SEEN_LF 1 | |
5158 | #define EOL_SEEN_CR 2 | |
5159 | #define EOL_SEEN_CRLF 4 | |
66cfb530 | 5160 | |
ff0dacd7 KH |
5161 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by |
5162 | SOURCE is encoded. If CATEGORY is one of | |
5163 | coding_category_utf_16_XXXX, assume that CR and LF are encoded by | |
5164 | two-byte, else they are encoded by one-byte. | |
5165 | ||
5166 | Return one of EOL_SEEN_XXX. */ | |
4ed46869 | 5167 | |
bc4bc72a | 5168 | #define MAX_EOL_CHECK_COUNT 3 |
d46c5b12 KH |
5169 | |
5170 | static int | |
89528eb3 | 5171 | detect_eol (source, src_bytes, category) |
d46c5b12 | 5172 | unsigned char *source; |
df7492f9 | 5173 | EMACS_INT src_bytes; |
89528eb3 | 5174 | enum coding_category category; |
4ed46869 | 5175 | { |
d46c5b12 | 5176 | unsigned char *src = source, *src_end = src + src_bytes; |
4ed46869 | 5177 | unsigned char c; |
df7492f9 KH |
5178 | int total = 0; |
5179 | int eol_seen = EOL_SEEN_NONE; | |
4ed46869 | 5180 | |
89528eb3 | 5181 | if ((1 << category) & CATEGORY_MASK_UTF_16) |
4ed46869 | 5182 | { |
df7492f9 | 5183 | int msb, lsb; |
fa42c37f | 5184 | |
89528eb3 KH |
5185 | msb = category == (coding_category_utf_16_le |
5186 | | coding_category_utf_16_le_nosig); | |
df7492f9 | 5187 | lsb = 1 - msb; |
fa42c37f | 5188 | |
df7492f9 | 5189 | while (src + 1 < src_end) |
fa42c37f | 5190 | { |
df7492f9 KH |
5191 | c = src[lsb]; |
5192 | if (src[msb] == 0 && (c == '\n' || c == '\r')) | |
fa42c37f | 5193 | { |
df7492f9 KH |
5194 | int this_eol; |
5195 | ||
5196 | if (c == '\n') | |
5197 | this_eol = EOL_SEEN_LF; | |
5198 | else if (src + 3 >= src_end | |
5199 | || src[msb + 2] != 0 | |
5200 | || src[lsb + 2] != '\n') | |
5201 | this_eol = EOL_SEEN_CR; | |
fa42c37f | 5202 | else |
8f924df7 | 5203 | this_eol = EOL_SEEN_CRLF; |
df7492f9 KH |
5204 | |
5205 | if (eol_seen == EOL_SEEN_NONE) | |
5206 | /* This is the first end-of-line. */ | |
5207 | eol_seen = this_eol; | |
5208 | else if (eol_seen != this_eol) | |
fa42c37f | 5209 | { |
df7492f9 KH |
5210 | /* The found type is different from what found before. */ |
5211 | eol_seen = EOL_SEEN_LF; | |
5212 | break; | |
fa42c37f | 5213 | } |
df7492f9 KH |
5214 | if (++total == MAX_EOL_CHECK_COUNT) |
5215 | break; | |
fa42c37f | 5216 | } |
df7492f9 | 5217 | src += 2; |
fa42c37f | 5218 | } |
bcf26d6a | 5219 | } |
d46c5b12 | 5220 | else |
c4825358 | 5221 | { |
df7492f9 | 5222 | while (src < src_end) |
27901516 | 5223 | { |
df7492f9 KH |
5224 | c = *src++; |
5225 | if (c == '\n' || c == '\r') | |
5226 | { | |
5227 | int this_eol; | |
d46c5b12 | 5228 | |
df7492f9 KH |
5229 | if (c == '\n') |
5230 | this_eol = EOL_SEEN_LF; | |
5231 | else if (src >= src_end || *src != '\n') | |
5232 | this_eol = EOL_SEEN_CR; | |
5233 | else | |
5234 | this_eol = EOL_SEEN_CRLF, src++; | |
d46c5b12 | 5235 | |
df7492f9 KH |
5236 | if (eol_seen == EOL_SEEN_NONE) |
5237 | /* This is the first end-of-line. */ | |
5238 | eol_seen = this_eol; | |
5239 | else if (eol_seen != this_eol) | |
5240 | { | |
5241 | /* The found type is different from what found before. */ | |
5242 | eol_seen = EOL_SEEN_LF; | |
5243 | break; | |
5244 | } | |
5245 | if (++total == MAX_EOL_CHECK_COUNT) | |
5246 | break; | |
5247 | } | |
5248 | } | |
73be902c | 5249 | } |
df7492f9 | 5250 | return eol_seen; |
73be902c KH |
5251 | } |
5252 | ||
df7492f9 | 5253 | |
73be902c | 5254 | static void |
df7492f9 KH |
5255 | adjust_coding_eol_type (coding, eol_seen) |
5256 | struct coding_system *coding; | |
5257 | int eol_seen; | |
73be902c | 5258 | { |
0be8721c | 5259 | Lisp_Object eol_type; |
8f924df7 | 5260 | |
df7492f9 KH |
5261 | eol_type = CODING_ID_EOL_TYPE (coding->id); |
5262 | if (eol_seen & EOL_SEEN_LF) | |
5263 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 0)); | |
6f197c07 | 5264 | else if (eol_seen & EOL_SEEN_CRLF) |
df7492f9 | 5265 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 1)); |
6f197c07 | 5266 | else if (eol_seen & EOL_SEEN_CR) |
df7492f9 | 5267 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 2)); |
d46c5b12 | 5268 | } |
4ed46869 | 5269 | |
df7492f9 KH |
5270 | /* Detect how a text specified in CODING is encoded. If a coding |
5271 | system is detected, update fields of CODING by the detected coding | |
5272 | system. */ | |
0a28aafb | 5273 | |
df7492f9 KH |
5274 | void |
5275 | detect_coding (coding) | |
d46c5b12 | 5276 | struct coding_system *coding; |
d46c5b12 | 5277 | { |
8f924df7 | 5278 | const unsigned char *src, *src_end; |
df7492f9 | 5279 | Lisp_Object attrs, coding_type; |
d46c5b12 | 5280 | |
df7492f9 KH |
5281 | coding->consumed = coding->consumed_char = 0; |
5282 | coding->produced = coding->produced_char = 0; | |
5283 | coding_set_source (coding); | |
1c3478b0 | 5284 | |
df7492f9 | 5285 | src_end = coding->source + coding->src_bytes; |
1c3478b0 | 5286 | |
df7492f9 KH |
5287 | /* If we have not yet decided the text encoding type, detect it |
5288 | now. */ | |
5289 | if (EQ (CODING_ATTR_TYPE (CODING_ID_ATTRS (coding->id)), Qundecided)) | |
b73bfc1c | 5290 | { |
df7492f9 KH |
5291 | int c, i; |
5292 | ||
5293 | for (src = coding->source; src < src_end; src++) | |
d46c5b12 | 5294 | { |
df7492f9 KH |
5295 | c = *src; |
5296 | if (c & 0x80 || (c < 0x20 && (c == ISO_CODE_ESC | |
5297 | || c == ISO_CODE_SI | |
5298 | || c == ISO_CODE_SO))) | |
5299 | break; | |
d46c5b12 | 5300 | } |
df7492f9 KH |
5301 | coding->head_ascii = src - (coding->source + coding->consumed); |
5302 | ||
5303 | if (coding->head_ascii < coding->src_bytes) | |
d46c5b12 | 5304 | { |
ff0dacd7 KH |
5305 | struct coding_detection_info detect_info; |
5306 | enum coding_category category; | |
5307 | struct coding_system *this; | |
df7492f9 | 5308 | |
ff0dacd7 | 5309 | detect_info.checked = detect_info.found = detect_info.rejected = 0; |
df7492f9 | 5310 | for (i = 0; i < coding_category_raw_text; i++) |
d46c5b12 | 5311 | { |
ff0dacd7 KH |
5312 | category = coding_priorities[i]; |
5313 | this = coding_categories + category; | |
df7492f9 | 5314 | if (this->id < 0) |
fa42c37f | 5315 | { |
df7492f9 | 5316 | /* No coding system of this category is defined. */ |
ff0dacd7 | 5317 | detect_info.rejected |= (1 << category); |
fa42c37f | 5318 | } |
ff0dacd7 | 5319 | else if (category >= coding_category_raw_text) |
89528eb3 | 5320 | continue; |
ff0dacd7 | 5321 | else if (detect_info.checked & (1 << category)) |
fa42c37f | 5322 | { |
ff0dacd7 KH |
5323 | if (detect_info.found & (1 << category)) |
5324 | break; | |
fa42c37f | 5325 | } |
ff0dacd7 KH |
5326 | else if ((*(this->detector)) (coding, &detect_info) |
5327 | && detect_info.found & (1 << category)) | |
5328 | break; | |
d46c5b12 | 5329 | } |
ff0dacd7 KH |
5330 | if (i < coding_category_raw_text) |
5331 | setup_coding_system (CODING_ID_NAME (this->id), coding); | |
5332 | else if (detect_info.rejected == CATEGORY_MASK_ANY) | |
df7492f9 | 5333 | setup_coding_system (Qraw_text, coding); |
ff0dacd7 | 5334 | else if (detect_info.rejected) |
df7492f9 | 5335 | for (i = 0; i < coding_category_raw_text; i++) |
ff0dacd7 KH |
5336 | if (! (detect_info.rejected & (1 << coding_priorities[i]))) |
5337 | { | |
5338 | this = coding_categories + coding_priorities[i]; | |
5339 | setup_coding_system (CODING_ID_NAME (this->id), coding); | |
5340 | break; | |
5341 | } | |
d46c5b12 | 5342 | } |
b73bfc1c | 5343 | } |
b49a1807 KH |
5344 | else if (EQ (CODING_ATTR_TYPE (CODING_ID_ATTRS (coding->id)), Qutf_16)) |
5345 | { | |
5346 | Lisp_Object coding_systems; | |
5347 | struct coding_detection_info detect_info; | |
5348 | ||
5349 | coding_systems | |
5350 | = AREF (CODING_ID_ATTRS (coding->id), coding_attr_utf_16_bom); | |
5351 | detect_info.found = detect_info.rejected = 0; | |
5352 | if (CONSP (coding_systems) | |
5353 | && detect_coding_utf_16 (coding, &detect_info) | |
5354 | && (detect_info.found & (CATEGORY_MASK_UTF_16_LE | |
5355 | | CATEGORY_MASK_UTF_16_BE))) | |
5356 | { | |
5357 | if (detect_info.found & CATEGORY_MASK_UTF_16_LE) | |
5358 | setup_coding_system (XCAR (coding_systems), coding); | |
5359 | else | |
5360 | setup_coding_system (XCDR (coding_systems), coding); | |
5361 | } | |
5362 | } | |
4ed46869 | 5363 | |
df7492f9 KH |
5364 | attrs = CODING_ID_ATTRS (coding->id); |
5365 | coding_type = CODING_ATTR_TYPE (attrs); | |
4ed46869 | 5366 | |
df7492f9 KH |
5367 | /* If we have not yet decided the EOL type, detect it now. But, the |
5368 | detection is impossible for a CCL based coding system, in which | |
5369 | case, we detct the EOL type after decoding. */ | |
5370 | if (VECTORP (CODING_ID_EOL_TYPE (coding->id)) | |
5371 | && ! EQ (coding_type, Qccl)) | |
d46c5b12 | 5372 | { |
89528eb3 KH |
5373 | int eol_seen = detect_eol (coding->source, coding->src_bytes, |
5374 | XINT (CODING_ATTR_CATEGORY (attrs))); | |
4ed46869 | 5375 | |
df7492f9 KH |
5376 | if (eol_seen != EOL_SEEN_NONE) |
5377 | adjust_coding_eol_type (coding, eol_seen); | |
d46c5b12 | 5378 | } |
4ed46869 | 5379 | } |
4ed46869 | 5380 | |
d46c5b12 | 5381 | |
aaaf0b1e | 5382 | static void |
df7492f9 | 5383 | decode_eol (coding) |
aaaf0b1e | 5384 | struct coding_system *coding; |
aaaf0b1e | 5385 | { |
df7492f9 | 5386 | if (VECTORP (CODING_ID_EOL_TYPE (coding->id))) |
aaaf0b1e | 5387 | { |
df7492f9 KH |
5388 | unsigned char *p = CHAR_POS_ADDR (coding->dst_pos); |
5389 | unsigned char *pend = p + coding->produced; | |
5390 | int eol_seen = EOL_SEEN_NONE; | |
4ed46869 | 5391 | |
df7492f9 | 5392 | for (; p < pend; p++) |
aaaf0b1e | 5393 | { |
df7492f9 KH |
5394 | if (*p == '\n') |
5395 | eol_seen |= EOL_SEEN_LF; | |
5396 | else if (*p == '\r') | |
aaaf0b1e | 5397 | { |
df7492f9 | 5398 | if (p + 1 < pend && *(p + 1) == '\n') |
aaaf0b1e | 5399 | { |
df7492f9 KH |
5400 | eol_seen |= EOL_SEEN_CRLF; |
5401 | p++; | |
aaaf0b1e | 5402 | } |
aaaf0b1e | 5403 | else |
df7492f9 | 5404 | eol_seen |= EOL_SEEN_CR; |
aaaf0b1e | 5405 | } |
aaaf0b1e | 5406 | } |
df7492f9 KH |
5407 | if (eol_seen != EOL_SEEN_NONE) |
5408 | adjust_coding_eol_type (coding, eol_seen); | |
aaaf0b1e | 5409 | } |
d46c5b12 | 5410 | |
df7492f9 | 5411 | if (EQ (CODING_ID_EOL_TYPE (coding->id), Qmac)) |
27901516 | 5412 | { |
df7492f9 KH |
5413 | unsigned char *p = CHAR_POS_ADDR (coding->dst_pos); |
5414 | unsigned char *pend = p + coding->produced; | |
d46c5b12 | 5415 | |
df7492f9 KH |
5416 | for (; p < pend; p++) |
5417 | if (*p == '\r') | |
5418 | *p = '\n'; | |
4ed46869 | 5419 | } |
df7492f9 KH |
5420 | else if (EQ (CODING_ID_EOL_TYPE (coding->id), Qdos)) |
5421 | { | |
5422 | unsigned char *p, *pbeg, *pend; | |
5423 | Lisp_Object undo_list; | |
b73bfc1c | 5424 | |
df7492f9 KH |
5425 | move_gap_both (coding->dst_pos + coding->produced_char, |
5426 | coding->dst_pos_byte + coding->produced); | |
5427 | undo_list = current_buffer->undo_list; | |
5428 | current_buffer->undo_list = Qt; | |
c197f191 | 5429 | del_range_2 (coding->dst_pos, coding->dst_pos_byte, GPT, GPT_BYTE, 0); |
df7492f9 KH |
5430 | current_buffer->undo_list = undo_list; |
5431 | pbeg = GPT_ADDR; | |
5432 | pend = pbeg + coding->produced; | |
b73bfc1c | 5433 | |
df7492f9 KH |
5434 | for (p = pend - 1; p >= pbeg; p--) |
5435 | if (*p == '\r') | |
5436 | { | |
5437 | safe_bcopy ((char *) (p + 1), (char *) p, pend - p - 1); | |
5438 | pend--; | |
5439 | } | |
5440 | coding->produced_char -= coding->produced - (pend - pbeg); | |
5441 | coding->produced = pend - pbeg; | |
5442 | insert_from_gap (coding->produced_char, coding->produced); | |
aaaf0b1e | 5443 | } |
4ed46869 KH |
5444 | } |
5445 | ||
df7492f9 KH |
5446 | static void |
5447 | translate_chars (coding, table) | |
4ed46869 | 5448 | struct coding_system *coding; |
df7492f9 | 5449 | Lisp_Object table; |
4ed46869 | 5450 | { |
df7492f9 KH |
5451 | int *charbuf = coding->charbuf; |
5452 | int *charbuf_end = charbuf + coding->charbuf_used; | |
5453 | int c; | |
d46c5b12 | 5454 | |
df7492f9 KH |
5455 | if (coding->chars_at_source) |
5456 | return; | |
4ed46869 | 5457 | |
df7492f9 | 5458 | while (charbuf < charbuf_end) |
8844fa83 | 5459 | { |
df7492f9 KH |
5460 | c = *charbuf; |
5461 | if (c < 0) | |
5462 | charbuf += c; | |
5463 | else | |
5464 | *charbuf++ = translate_char (table, c); | |
8844fa83 | 5465 | } |
df7492f9 | 5466 | } |
bc4bc72a | 5467 | |
d46c5b12 | 5468 | static int |
df7492f9 KH |
5469 | produce_chars (coding) |
5470 | struct coding_system *coding; | |
4ed46869 | 5471 | { |
df7492f9 KH |
5472 | unsigned char *dst = coding->destination + coding->produced; |
5473 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
5474 | int produced; | |
5475 | int produced_chars = 0; | |
4ed46869 | 5476 | |
df7492f9 | 5477 | if (! coding->chars_at_source) |
4ed46869 | 5478 | { |
df7492f9 KH |
5479 | /* Characters are in coding->charbuf. */ |
5480 | int *buf = coding->charbuf; | |
5481 | int *buf_end = buf + coding->charbuf_used; | |
5482 | unsigned char *adjusted_dst_end; | |
4ed46869 | 5483 | |
df7492f9 KH |
5484 | if (BUFFERP (coding->src_object) |
5485 | && EQ (coding->src_object, coding->dst_object)) | |
8f924df7 | 5486 | dst_end = ((unsigned char *) coding->source) + coding->consumed; |
df7492f9 | 5487 | adjusted_dst_end = dst_end - MAX_MULTIBYTE_LENGTH; |
4ed46869 | 5488 | |
df7492f9 | 5489 | while (buf < buf_end) |
4ed46869 | 5490 | { |
df7492f9 | 5491 | int c = *buf++; |
bc4bc72a | 5492 | |
df7492f9 | 5493 | if (dst >= adjusted_dst_end) |
d46c5b12 | 5494 | { |
df7492f9 KH |
5495 | dst = alloc_destination (coding, |
5496 | buf_end - buf + MAX_MULTIBYTE_LENGTH, | |
5497 | dst); | |
5498 | dst_end = coding->destination + coding->dst_bytes; | |
5499 | adjusted_dst_end = dst_end - MAX_MULTIBYTE_LENGTH; | |
5500 | } | |
5501 | if (c >= 0) | |
5502 | { | |
5503 | if (coding->dst_multibyte | |
5504 | || ! CHAR_BYTE8_P (c)) | |
5505 | CHAR_STRING_ADVANCE (c, dst); | |
5506 | else | |
5507 | *dst++ = CHAR_TO_BYTE8 (c); | |
5508 | produced_chars++; | |
d46c5b12 | 5509 | } |
df7492f9 | 5510 | else |
d3e4cb56 KH |
5511 | /* This is an annotation datum. (-C) is the length of |
5512 | it. */ | |
5513 | buf += -c - 1; | |
4ed46869 KH |
5514 | } |
5515 | } | |
fa42c37f | 5516 | else |
fa42c37f | 5517 | { |
8f924df7 KH |
5518 | const unsigned char *src = coding->source; |
5519 | const unsigned char *src_end = src + coding->src_bytes; | |
df7492f9 | 5520 | Lisp_Object eol_type; |
fa42c37f | 5521 | |
df7492f9 | 5522 | eol_type = CODING_ID_EOL_TYPE (coding->id); |
4ed46869 | 5523 | |
df7492f9 | 5524 | if (coding->src_multibyte != coding->dst_multibyte) |
fa42c37f | 5525 | { |
df7492f9 | 5526 | if (coding->src_multibyte) |
fa42c37f | 5527 | { |
71c81426 | 5528 | int multibytep = 1; |
df7492f9 | 5529 | int consumed_chars; |
d46c5b12 | 5530 | |
df7492f9 KH |
5531 | while (1) |
5532 | { | |
8f924df7 | 5533 | const unsigned char *src_base = src; |
df7492f9 | 5534 | int c; |
b73bfc1c | 5535 | |
df7492f9 KH |
5536 | ONE_MORE_BYTE (c); |
5537 | if (c == '\r') | |
5538 | { | |
5539 | if (EQ (eol_type, Qdos)) | |
5540 | { | |
98725083 KH |
5541 | if (src == src_end) |
5542 | { | |
5543 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; | |
5544 | goto no_more_source; | |
5545 | } | |
5546 | if (*src == '\n') | |
df7492f9 KH |
5547 | c = *src++; |
5548 | } | |
5549 | else if (EQ (eol_type, Qmac)) | |
5550 | c = '\n'; | |
5551 | } | |
5552 | if (dst == dst_end) | |
5553 | { | |
2c78b7e1 | 5554 | coding->consumed = src - coding->source; |
b73bfc1c | 5555 | |
2c78b7e1 | 5556 | if (EQ (coding->src_object, coding->dst_object)) |
8f924df7 | 5557 | dst_end = (unsigned char *) src; |
2c78b7e1 KH |
5558 | if (dst == dst_end) |
5559 | { | |
5560 | dst = alloc_destination (coding, src_end - src + 1, | |
5561 | dst); | |
5562 | dst_end = coding->destination + coding->dst_bytes; | |
5563 | coding_set_source (coding); | |
5564 | src = coding->source + coding->consumed; | |
5565 | src_end = coding->source + coding->src_bytes; | |
5566 | } | |
df7492f9 KH |
5567 | } |
5568 | *dst++ = c; | |
5569 | produced_chars++; | |
5570 | } | |
5571 | no_more_source: | |
5572 | ; | |
fa42c37f KH |
5573 | } |
5574 | else | |
df7492f9 KH |
5575 | while (src < src_end) |
5576 | { | |
71c81426 | 5577 | int multibytep = 1; |
df7492f9 | 5578 | int c = *src++; |
b73bfc1c | 5579 | |
df7492f9 KH |
5580 | if (c == '\r') |
5581 | { | |
5582 | if (EQ (eol_type, Qdos)) | |
5583 | { | |
5584 | if (src < src_end | |
5585 | && *src == '\n') | |
5586 | c = *src++; | |
5587 | } | |
5588 | else if (EQ (eol_type, Qmac)) | |
5589 | c = '\n'; | |
5590 | } | |
5591 | if (dst >= dst_end - 1) | |
5592 | { | |
2c78b7e1 | 5593 | coding->consumed = src - coding->source; |
df7492f9 | 5594 | |
2c78b7e1 | 5595 | if (EQ (coding->src_object, coding->dst_object)) |
8f924df7 | 5596 | dst_end = (unsigned char *) src; |
2c78b7e1 KH |
5597 | if (dst >= dst_end - 1) |
5598 | { | |
5599 | dst = alloc_destination (coding, src_end - src + 2, | |
5600 | dst); | |
5601 | dst_end = coding->destination + coding->dst_bytes; | |
5602 | coding_set_source (coding); | |
5603 | src = coding->source + coding->consumed; | |
5604 | src_end = coding->source + coding->src_bytes; | |
5605 | } | |
df7492f9 KH |
5606 | } |
5607 | EMIT_ONE_BYTE (c); | |
5608 | } | |
d46c5b12 | 5609 | } |
df7492f9 KH |
5610 | else |
5611 | { | |
5612 | if (!EQ (coding->src_object, coding->dst_object)) | |
fa42c37f | 5613 | { |
df7492f9 | 5614 | int require = coding->src_bytes - coding->dst_bytes; |
4ed46869 | 5615 | |
df7492f9 | 5616 | if (require > 0) |
fa42c37f | 5617 | { |
df7492f9 KH |
5618 | EMACS_INT offset = src - coding->source; |
5619 | ||
5620 | dst = alloc_destination (coding, require, dst); | |
5621 | coding_set_source (coding); | |
5622 | src = coding->source + offset; | |
5623 | src_end = coding->source + coding->src_bytes; | |
fa42c37f KH |
5624 | } |
5625 | } | |
df7492f9 KH |
5626 | produced_chars = coding->src_chars; |
5627 | while (src < src_end) | |
fa42c37f | 5628 | { |
df7492f9 KH |
5629 | int c = *src++; |
5630 | ||
5631 | if (c == '\r') | |
5632 | { | |
5633 | if (EQ (eol_type, Qdos)) | |
5634 | { | |
5635 | if (src < src_end | |
5636 | && *src == '\n') | |
5637 | c = *src++; | |
5638 | produced_chars--; | |
5639 | } | |
5640 | else if (EQ (eol_type, Qmac)) | |
5641 | c = '\n'; | |
5642 | } | |
5643 | *dst++ = c; | |
fa42c37f KH |
5644 | } |
5645 | } | |
2c78b7e1 KH |
5646 | coding->consumed = coding->src_bytes; |
5647 | coding->consumed_char = coding->src_chars; | |
fa42c37f KH |
5648 | } |
5649 | ||
df7492f9 KH |
5650 | produced = dst - (coding->destination + coding->produced); |
5651 | if (BUFFERP (coding->dst_object)) | |
5652 | insert_from_gap (produced_chars, produced); | |
5653 | coding->produced += produced; | |
5654 | coding->produced_char += produced_chars; | |
5655 | return produced_chars; | |
fa42c37f KH |
5656 | } |
5657 | ||
ff0dacd7 KH |
5658 | /* Compose text in CODING->object according to the annotation data at |
5659 | CHARBUF. CHARBUF is an array: | |
5660 | [ -LENGTH ANNOTATION_MASK FROM TO METHOD COMP_LEN [ COMPONENTS... ] ] | |
df7492f9 | 5661 | */ |
4ed46869 | 5662 | |
df7492f9 KH |
5663 | static INLINE void |
5664 | produce_composition (coding, charbuf) | |
4ed46869 | 5665 | struct coding_system *coding; |
df7492f9 | 5666 | int *charbuf; |
4ed46869 | 5667 | { |
df7492f9 | 5668 | int len; |
ff0dacd7 | 5669 | EMACS_INT from, to; |
df7492f9 | 5670 | enum composition_method method; |
df7492f9 | 5671 | Lisp_Object components; |
fa42c37f | 5672 | |
df7492f9 | 5673 | len = -charbuf[0]; |
ff0dacd7 KH |
5674 | from = coding->dst_pos + charbuf[2]; |
5675 | to = coding->dst_pos + charbuf[3]; | |
5676 | method = (enum composition_method) (charbuf[4]); | |
d46c5b12 | 5677 | |
df7492f9 KH |
5678 | if (method == COMPOSITION_RELATIVE) |
5679 | components = Qnil; | |
d46c5b12 | 5680 | else |
d46c5b12 | 5681 | { |
df7492f9 KH |
5682 | Lisp_Object args[MAX_COMPOSITION_COMPONENTS * 2 - 1]; |
5683 | int i; | |
b73bfc1c | 5684 | |
df7492f9 KH |
5685 | len -= 5; |
5686 | charbuf += 5; | |
5687 | for (i = 0; i < len; i++) | |
5688 | args[i] = make_number (charbuf[i]); | |
5689 | components = (method == COMPOSITION_WITH_ALTCHARS | |
5690 | ? Fstring (len, args) : Fvector (len, args)); | |
d46c5b12 | 5691 | } |
ff0dacd7 | 5692 | compose_text (from, to, components, Qnil, coding->dst_object); |
d46c5b12 KH |
5693 | } |
5694 | ||
d46c5b12 | 5695 | |
ff0dacd7 KH |
5696 | /* Put `charset' property on text in CODING->object according to |
5697 | the annotation data at CHARBUF. CHARBUF is an array: | |
5698 | [ -LENGTH ANNOTATION_MASK FROM TO CHARSET-ID ] | |
5699 | */ | |
d46c5b12 | 5700 | |
ff0dacd7 KH |
5701 | static INLINE void |
5702 | produce_charset (coding, charbuf) | |
d46c5b12 | 5703 | struct coding_system *coding; |
ff0dacd7 | 5704 | int *charbuf; |
d46c5b12 | 5705 | { |
ff0dacd7 KH |
5706 | EMACS_INT from = coding->dst_pos + charbuf[2]; |
5707 | EMACS_INT to = coding->dst_pos + charbuf[3]; | |
5708 | struct charset *charset = CHARSET_FROM_ID (charbuf[4]); | |
b73bfc1c | 5709 | |
ff0dacd7 KH |
5710 | Fput_text_property (make_number (from), make_number (to), |
5711 | Qcharset, CHARSET_NAME (charset), | |
5712 | coding->dst_object); | |
d46c5b12 KH |
5713 | } |
5714 | ||
d46c5b12 | 5715 | |
df7492f9 KH |
5716 | #define CHARBUF_SIZE 0x4000 |
5717 | ||
5718 | #define ALLOC_CONVERSION_WORK_AREA(coding) \ | |
5719 | do { \ | |
5720 | int size = CHARBUF_SIZE;; \ | |
5721 | \ | |
5722 | coding->charbuf = NULL; \ | |
5723 | while (size > 1024) \ | |
5724 | { \ | |
5725 | coding->charbuf = (int *) alloca (sizeof (int) * size); \ | |
5726 | if (coding->charbuf) \ | |
5727 | break; \ | |
5728 | size >>= 1; \ | |
5729 | } \ | |
5730 | if (! coding->charbuf) \ | |
5731 | { \ | |
5732 | coding->result = CODING_RESULT_INSUFFICIENT_MEM; \ | |
5733 | return coding->result; \ | |
5734 | } \ | |
5735 | coding->charbuf_size = size; \ | |
5736 | } while (0) | |
4ed46869 | 5737 | |
d46c5b12 KH |
5738 | |
5739 | static void | |
df7492f9 | 5740 | produce_annotation (coding) |
d46c5b12 | 5741 | struct coding_system *coding; |
d46c5b12 | 5742 | { |
df7492f9 KH |
5743 | int *charbuf = coding->charbuf; |
5744 | int *charbuf_end = charbuf + coding->charbuf_used; | |
d46c5b12 | 5745 | |
ff0dacd7 KH |
5746 | if (NILP (coding->dst_object)) |
5747 | return; | |
d46c5b12 | 5748 | |
df7492f9 | 5749 | while (charbuf < charbuf_end) |
a84f1519 | 5750 | { |
df7492f9 KH |
5751 | if (*charbuf >= 0) |
5752 | charbuf++; | |
d46c5b12 | 5753 | else |
d46c5b12 | 5754 | { |
df7492f9 | 5755 | int len = -*charbuf; |
ff0dacd7 | 5756 | switch (charbuf[1]) |
df7492f9 KH |
5757 | { |
5758 | case CODING_ANNOTATE_COMPOSITION_MASK: | |
5759 | produce_composition (coding, charbuf); | |
5760 | break; | |
ff0dacd7 KH |
5761 | case CODING_ANNOTATE_CHARSET_MASK: |
5762 | produce_charset (coding, charbuf); | |
5763 | break; | |
df7492f9 KH |
5764 | default: |
5765 | abort (); | |
5766 | } | |
5767 | charbuf += len; | |
d46c5b12 | 5768 | } |
a84f1519 | 5769 | } |
d46c5b12 KH |
5770 | } |
5771 | ||
df7492f9 KH |
5772 | /* Decode the data at CODING->src_object into CODING->dst_object. |
5773 | CODING->src_object is a buffer, a string, or nil. | |
5774 | CODING->dst_object is a buffer. | |
d46c5b12 | 5775 | |
df7492f9 KH |
5776 | If CODING->src_object is a buffer, it must be the current buffer. |
5777 | In this case, if CODING->src_pos is positive, it is a position of | |
5778 | the source text in the buffer, otherwise, the source text is in the | |
5779 | gap area of the buffer, and CODING->src_pos specifies the offset of | |
5780 | the text from GPT (which must be the same as PT). If this is the | |
5781 | same buffer as CODING->dst_object, CODING->src_pos must be | |
5782 | negative. | |
d46c5b12 | 5783 | |
df7492f9 KH |
5784 | If CODING->src_object is a string, CODING->src_pos in an index to |
5785 | that string. | |
d46c5b12 | 5786 | |
df7492f9 KH |
5787 | If CODING->src_object is nil, CODING->source must already point to |
5788 | the non-relocatable memory area. In this case, CODING->src_pos is | |
5789 | an offset from CODING->source. | |
73be902c | 5790 | |
df7492f9 KH |
5791 | The decoded data is inserted at the current point of the buffer |
5792 | CODING->dst_object. | |
5793 | */ | |
d46c5b12 | 5794 | |
df7492f9 KH |
5795 | static int |
5796 | decode_coding (coding) | |
d46c5b12 | 5797 | struct coding_system *coding; |
d46c5b12 | 5798 | { |
df7492f9 | 5799 | Lisp_Object attrs; |
d46c5b12 | 5800 | |
df7492f9 KH |
5801 | if (BUFFERP (coding->src_object) |
5802 | && coding->src_pos > 0 | |
5803 | && coding->src_pos < GPT | |
5804 | && coding->src_pos + coding->src_chars > GPT) | |
5805 | move_gap_both (coding->src_pos, coding->src_pos_byte); | |
d46c5b12 | 5806 | |
df7492f9 | 5807 | if (BUFFERP (coding->dst_object)) |
1c3478b0 | 5808 | { |
df7492f9 KH |
5809 | if (current_buffer != XBUFFER (coding->dst_object)) |
5810 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
5811 | if (GPT != PT) | |
5812 | move_gap_both (PT, PT_BYTE); | |
1c3478b0 KH |
5813 | } |
5814 | ||
df7492f9 KH |
5815 | coding->consumed = coding->consumed_char = 0; |
5816 | coding->produced = coding->produced_char = 0; | |
5817 | coding->chars_at_source = 0; | |
5818 | coding->result = CODING_RESULT_SUCCESS; | |
5819 | coding->errors = 0; | |
1c3478b0 | 5820 | |
df7492f9 KH |
5821 | ALLOC_CONVERSION_WORK_AREA (coding); |
5822 | ||
5823 | attrs = CODING_ID_ATTRS (coding->id); | |
5824 | ||
5825 | do | |
b73bfc1c | 5826 | { |
df7492f9 KH |
5827 | coding_set_source (coding); |
5828 | coding->annotated = 0; | |
5829 | (*(coding->decoder)) (coding); | |
5830 | if (!NILP (CODING_ATTR_DECODE_TBL (attrs))) | |
da4109a9 KH |
5831 | translate_chars (coding, CODING_ATTR_DECODE_TBL (attrs)); |
5832 | else if (!NILP (Vstandard_translation_table_for_decode)) | |
5833 | translate_chars (coding, Vstandard_translation_table_for_decode); | |
df7492f9 KH |
5834 | coding_set_destination (coding); |
5835 | produce_chars (coding); | |
5836 | if (coding->annotated) | |
5837 | produce_annotation (coding); | |
d46c5b12 | 5838 | } |
df7492f9 KH |
5839 | while (coding->consumed < coding->src_bytes |
5840 | && ! coding->result); | |
d46c5b12 | 5841 | |
df7492f9 KH |
5842 | if (EQ (CODING_ATTR_TYPE (CODING_ID_ATTRS (coding->id)), Qccl) |
5843 | && SYMBOLP (CODING_ID_EOL_TYPE (coding->id)) | |
5844 | && ! EQ (CODING_ID_EOL_TYPE (coding->id), Qunix)) | |
5845 | decode_eol (coding); | |
d46c5b12 | 5846 | |
df7492f9 KH |
5847 | coding->carryover_bytes = 0; |
5848 | if (coding->consumed < coding->src_bytes) | |
d46c5b12 | 5849 | { |
df7492f9 | 5850 | int nbytes = coding->src_bytes - coding->consumed; |
8f924df7 | 5851 | const unsigned char *src; |
df7492f9 KH |
5852 | |
5853 | coding_set_source (coding); | |
5854 | coding_set_destination (coding); | |
5855 | src = coding->source + coding->consumed; | |
5856 | ||
5857 | if (coding->mode & CODING_MODE_LAST_BLOCK) | |
1c3478b0 | 5858 | { |
df7492f9 KH |
5859 | /* Flush out unprocessed data as binary chars. We are sure |
5860 | that the number of data is less than the size of | |
5861 | coding->charbuf. */ | |
df7492f9 | 5862 | while (nbytes-- > 0) |
1c3478b0 | 5863 | { |
df7492f9 | 5864 | int c = *src++; |
98725083 KH |
5865 | |
5866 | coding->charbuf[coding->charbuf_used++] = (c & 0x80 ? - c : c); | |
1c3478b0 | 5867 | } |
df7492f9 | 5868 | produce_chars (coding); |
d46c5b12 | 5869 | } |
d46c5b12 | 5870 | else |
df7492f9 KH |
5871 | { |
5872 | /* Record unprocessed bytes in coding->carryover. We are | |
5873 | sure that the number of data is less than the size of | |
5874 | coding->carryover. */ | |
5875 | unsigned char *p = coding->carryover; | |
5876 | ||
5877 | coding->carryover_bytes = nbytes; | |
5878 | while (nbytes-- > 0) | |
5879 | *p++ = *src++; | |
1c3478b0 | 5880 | } |
df7492f9 | 5881 | coding->consumed = coding->src_bytes; |
b73bfc1c | 5882 | } |
69f76525 | 5883 | |
73be902c | 5884 | return coding->result; |
4ed46869 KH |
5885 | } |
5886 | ||
aaaf0b1e | 5887 | |
e1c23804 | 5888 | /* Extract an annotation datum from a composition starting at POS and |
ff0dacd7 KH |
5889 | ending before LIMIT of CODING->src_object (buffer or string), store |
5890 | the data in BUF, set *STOP to a starting position of the next | |
5891 | composition (if any) or to LIMIT, and return the address of the | |
5892 | next element of BUF. | |
5893 | ||
5894 | If such an annotation is not found, set *STOP to a starting | |
5895 | position of a composition after POS (if any) or to LIMIT, and | |
5896 | return BUF. */ | |
5897 | ||
5898 | static INLINE int * | |
5899 | handle_composition_annotation (pos, limit, coding, buf, stop) | |
5900 | EMACS_INT pos, limit; | |
aaaf0b1e | 5901 | struct coding_system *coding; |
ff0dacd7 KH |
5902 | int *buf; |
5903 | EMACS_INT *stop; | |
aaaf0b1e | 5904 | { |
ff0dacd7 KH |
5905 | EMACS_INT start, end; |
5906 | Lisp_Object prop; | |
aaaf0b1e | 5907 | |
ff0dacd7 KH |
5908 | if (! find_composition (pos, limit, &start, &end, &prop, coding->src_object) |
5909 | || end > limit) | |
5910 | *stop = limit; | |
5911 | else if (start > pos) | |
5912 | *stop = start; | |
5913 | else | |
aaaf0b1e | 5914 | { |
ff0dacd7 | 5915 | if (start == pos) |
aaaf0b1e | 5916 | { |
ff0dacd7 KH |
5917 | /* We found a composition. Store the corresponding |
5918 | annotation data in BUF. */ | |
5919 | int *head = buf; | |
5920 | enum composition_method method = COMPOSITION_METHOD (prop); | |
5921 | int nchars = COMPOSITION_LENGTH (prop); | |
5922 | ||
5923 | ADD_COMPOSITION_DATA (buf, 0, nchars, method); | |
5924 | if (method != COMPOSITION_RELATIVE) | |
aaaf0b1e | 5925 | { |
ff0dacd7 KH |
5926 | Lisp_Object components; |
5927 | int len, i, i_byte; | |
5928 | ||
5929 | components = COMPOSITION_COMPONENTS (prop); | |
5930 | if (VECTORP (components)) | |
aaaf0b1e | 5931 | { |
ff0dacd7 KH |
5932 | len = XVECTOR (components)->size; |
5933 | for (i = 0; i < len; i++) | |
5934 | *buf++ = XINT (AREF (components, i)); | |
aaaf0b1e | 5935 | } |
ff0dacd7 | 5936 | else if (STRINGP (components)) |
aaaf0b1e | 5937 | { |
8f924df7 | 5938 | len = SCHARS (components); |
ff0dacd7 KH |
5939 | i = i_byte = 0; |
5940 | while (i < len) | |
5941 | { | |
5942 | FETCH_STRING_CHAR_ADVANCE (*buf, components, i, i_byte); | |
5943 | buf++; | |
5944 | } | |
5945 | } | |
5946 | else if (INTEGERP (components)) | |
5947 | { | |
5948 | len = 1; | |
5949 | *buf++ = XINT (components); | |
5950 | } | |
5951 | else if (CONSP (components)) | |
5952 | { | |
5953 | for (len = 0; CONSP (components); | |
5954 | len++, components = XCDR (components)) | |
5955 | *buf++ = XINT (XCAR (components)); | |
aaaf0b1e | 5956 | } |
aaaf0b1e | 5957 | else |
ff0dacd7 KH |
5958 | abort (); |
5959 | *head -= len; | |
aaaf0b1e | 5960 | } |
aaaf0b1e | 5961 | } |
ff0dacd7 KH |
5962 | |
5963 | if (find_composition (end, limit, &start, &end, &prop, | |
5964 | coding->src_object) | |
5965 | && end <= limit) | |
5966 | *stop = start; | |
5967 | else | |
5968 | *stop = limit; | |
aaaf0b1e | 5969 | } |
ff0dacd7 KH |
5970 | return buf; |
5971 | } | |
5972 | ||
5973 | ||
e1c23804 | 5974 | /* Extract an annotation datum from a text property `charset' at POS of |
ff0dacd7 KH |
5975 | CODING->src_object (buffer of string), store the data in BUF, set |
5976 | *STOP to the position where the value of `charset' property changes | |
5977 | (limiting by LIMIT), and return the address of the next element of | |
5978 | BUF. | |
5979 | ||
5980 | If the property value is nil, set *STOP to the position where the | |
5981 | property value is non-nil (limiting by LIMIT), and return BUF. */ | |
5982 | ||
5983 | static INLINE int * | |
5984 | handle_charset_annotation (pos, limit, coding, buf, stop) | |
5985 | EMACS_INT pos, limit; | |
5986 | struct coding_system *coding; | |
5987 | int *buf; | |
5988 | EMACS_INT *stop; | |
5989 | { | |
5990 | Lisp_Object val, next; | |
5991 | int id; | |
5992 | ||
5993 | val = Fget_text_property (make_number (pos), Qcharset, coding->src_object); | |
5994 | if (! NILP (val) && CHARSETP (val)) | |
5995 | id = XINT (CHARSET_SYMBOL_ID (val)); | |
5996 | else | |
5997 | id = -1; | |
5998 | ADD_CHARSET_DATA (buf, 0, 0, id); | |
5999 | next = Fnext_single_property_change (make_number (pos), Qcharset, | |
6000 | coding->src_object, | |
6001 | make_number (limit)); | |
6002 | *stop = XINT (next); | |
6003 | return buf; | |
6004 | } | |
6005 | ||
6006 | ||
df7492f9 KH |
6007 | static void |
6008 | consume_chars (coding) | |
6009 | struct coding_system *coding; | |
6010 | { | |
6011 | int *buf = coding->charbuf; | |
ff0dacd7 | 6012 | int *buf_end = coding->charbuf + coding->charbuf_size; |
7c78e542 | 6013 | const unsigned char *src = coding->source + coding->consumed; |
4776e638 | 6014 | const unsigned char *src_end = coding->source + coding->src_bytes; |
ff0dacd7 KH |
6015 | EMACS_INT pos = coding->src_pos + coding->consumed_char; |
6016 | EMACS_INT end_pos = coding->src_pos + coding->src_chars; | |
df7492f9 KH |
6017 | int multibytep = coding->src_multibyte; |
6018 | Lisp_Object eol_type; | |
6019 | int c; | |
ff0dacd7 | 6020 | EMACS_INT stop, stop_composition, stop_charset; |
88993dfd | 6021 | |
df7492f9 KH |
6022 | eol_type = CODING_ID_EOL_TYPE (coding->id); |
6023 | if (VECTORP (eol_type)) | |
6024 | eol_type = Qunix; | |
88993dfd | 6025 | |
df7492f9 KH |
6026 | /* Note: composition handling is not yet implemented. */ |
6027 | coding->common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
ec6d2bb8 | 6028 | |
ff0dacd7 KH |
6029 | if (coding->common_flags & CODING_ANNOTATE_COMPOSITION_MASK) |
6030 | stop = stop_composition = pos; | |
6031 | else | |
6032 | stop = stop_composition = end_pos; | |
6033 | if (coding->common_flags & CODING_ANNOTATE_CHARSET_MASK) | |
6034 | stop = stop_charset = pos; | |
df7492f9 | 6035 | else |
ff0dacd7 | 6036 | stop_charset = end_pos; |
ec6d2bb8 | 6037 | |
ff0dacd7 KH |
6038 | /* Compensate for CRLF and annotation. */ |
6039 | buf_end -= 1 + MAX_ANNOTATION_LENGTH; | |
df7492f9 | 6040 | while (buf < buf_end) |
aaaf0b1e | 6041 | { |
df7492f9 | 6042 | if (pos == stop) |
ec6d2bb8 | 6043 | { |
df7492f9 KH |
6044 | if (pos == end_pos) |
6045 | break; | |
ff0dacd7 KH |
6046 | if (pos == stop_composition) |
6047 | buf = handle_composition_annotation (pos, end_pos, coding, | |
6048 | buf, &stop_composition); | |
6049 | if (pos == stop_charset) | |
6050 | buf = handle_charset_annotation (pos, end_pos, coding, | |
6051 | buf, &stop_charset); | |
6052 | stop = (stop_composition < stop_charset | |
6053 | ? stop_composition : stop_charset); | |
df7492f9 KH |
6054 | } |
6055 | ||
6056 | if (! multibytep) | |
4776e638 | 6057 | { |
d3e4cb56 | 6058 | EMACS_INT bytes; |
aaaf0b1e | 6059 | |
d3e4cb56 KH |
6060 | if (! CODING_FOR_UNIBYTE (coding) |
6061 | && (bytes = MULTIBYTE_LENGTH (src, src_end)) > 0) | |
4776e638 KH |
6062 | c = STRING_CHAR_ADVANCE (src), pos += bytes; |
6063 | else | |
6064 | c = *src++, pos++; | |
6065 | } | |
df7492f9 | 6066 | else |
4776e638 | 6067 | c = STRING_CHAR_ADVANCE (src), pos++; |
df7492f9 KH |
6068 | if ((c == '\r') && (coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) |
6069 | c = '\n'; | |
6070 | if (! EQ (eol_type, Qunix)) | |
aaaf0b1e | 6071 | { |
df7492f9 | 6072 | if (c == '\n') |
aaaf0b1e | 6073 | { |
df7492f9 KH |
6074 | if (EQ (eol_type, Qdos)) |
6075 | *buf++ = '\r'; | |
6076 | else | |
6077 | c = '\r'; | |
aaaf0b1e KH |
6078 | } |
6079 | } | |
df7492f9 | 6080 | *buf++ = c; |
aaaf0b1e | 6081 | } |
ec6d2bb8 | 6082 | |
df7492f9 KH |
6083 | coding->consumed = src - coding->source; |
6084 | coding->consumed_char = pos - coding->src_pos; | |
6085 | coding->charbuf_used = buf - coding->charbuf; | |
6086 | coding->chars_at_source = 0; | |
aaaf0b1e KH |
6087 | } |
6088 | ||
4ed46869 | 6089 | |
df7492f9 KH |
6090 | /* Encode the text at CODING->src_object into CODING->dst_object. |
6091 | CODING->src_object is a buffer or a string. | |
6092 | CODING->dst_object is a buffer or nil. | |
6093 | ||
6094 | If CODING->src_object is a buffer, it must be the current buffer. | |
6095 | In this case, if CODING->src_pos is positive, it is a position of | |
6096 | the source text in the buffer, otherwise. the source text is in the | |
6097 | gap area of the buffer, and coding->src_pos specifies the offset of | |
6098 | the text from GPT (which must be the same as PT). If this is the | |
6099 | same buffer as CODING->dst_object, CODING->src_pos must be | |
6100 | negative and CODING should not have `pre-write-conversion'. | |
6101 | ||
6102 | If CODING->src_object is a string, CODING should not have | |
6103 | `pre-write-conversion'. | |
6104 | ||
6105 | If CODING->dst_object is a buffer, the encoded data is inserted at | |
6106 | the current point of that buffer. | |
6107 | ||
6108 | If CODING->dst_object is nil, the encoded data is placed at the | |
6109 | memory area specified by CODING->destination. */ | |
6110 | ||
6111 | static int | |
6112 | encode_coding (coding) | |
4ed46869 | 6113 | struct coding_system *coding; |
4ed46869 | 6114 | { |
df7492f9 | 6115 | Lisp_Object attrs; |
9861e777 | 6116 | |
df7492f9 | 6117 | attrs = CODING_ID_ATTRS (coding->id); |
4ed46869 | 6118 | |
df7492f9 | 6119 | if (BUFFERP (coding->dst_object)) |
8844fa83 | 6120 | { |
df7492f9 KH |
6121 | set_buffer_internal (XBUFFER (coding->dst_object)); |
6122 | coding->dst_multibyte | |
6123 | = ! NILP (current_buffer->enable_multibyte_characters); | |
8844fa83 | 6124 | } |
4ed46869 | 6125 | |
b73bfc1c | 6126 | coding->consumed = coding->consumed_char = 0; |
df7492f9 KH |
6127 | coding->produced = coding->produced_char = 0; |
6128 | coding->result = CODING_RESULT_SUCCESS; | |
b73bfc1c | 6129 | coding->errors = 0; |
b73bfc1c | 6130 | |
df7492f9 | 6131 | ALLOC_CONVERSION_WORK_AREA (coding); |
4ed46869 | 6132 | |
df7492f9 KH |
6133 | do { |
6134 | coding_set_source (coding); | |
6135 | consume_chars (coding); | |
4ed46869 | 6136 | |
df7492f9 | 6137 | if (!NILP (CODING_ATTR_ENCODE_TBL (attrs))) |
da4109a9 KH |
6138 | translate_chars (coding, CODING_ATTR_ENCODE_TBL (attrs)); |
6139 | else if (!NILP (Vstandard_translation_table_for_encode)) | |
6140 | translate_chars (coding, Vstandard_translation_table_for_encode); | |
b73bfc1c | 6141 | |
df7492f9 KH |
6142 | coding_set_destination (coding); |
6143 | (*(coding->encoder)) (coding); | |
6144 | } while (coding->consumed_char < coding->src_chars); | |
6145 | ||
6146 | if (BUFFERP (coding->dst_object)) | |
6147 | insert_from_gap (coding->produced_char, coding->produced); | |
6148 | ||
6149 | return (coding->result); | |
ec6d2bb8 KH |
6150 | } |
6151 | ||
fb88bf2d | 6152 | |
4776e638 KH |
6153 | /* Stack of working buffers used in code conversion. An nil element |
6154 | means that the code conversion of that level is not using a working | |
6155 | buffer. */ | |
df7492f9 | 6156 | Lisp_Object Vcode_conversion_work_buf_list; |
d46c5b12 | 6157 | |
df7492f9 KH |
6158 | /* A working buffer used by the top level conversion. */ |
6159 | Lisp_Object Vcode_conversion_reused_work_buf; | |
b73bfc1c | 6160 | |
4ed46869 | 6161 | |
df7492f9 KH |
6162 | /* Return a working buffer that can be freely used by the following |
6163 | code conversion. MULTIBYTEP specifies the multibyteness of the | |
6164 | buffer. */ | |
b73bfc1c | 6165 | |
df7492f9 | 6166 | Lisp_Object |
4776e638 KH |
6167 | make_conversion_work_buffer (multibytep, depth) |
6168 | int multibytep, depth; | |
df7492f9 KH |
6169 | { |
6170 | struct buffer *current = current_buffer; | |
4776e638 | 6171 | Lisp_Object buf, name; |
4ed46869 | 6172 | |
4776e638 | 6173 | if (depth == 0) |
e133c8fa | 6174 | { |
df7492f9 KH |
6175 | if (NILP (Vcode_conversion_reused_work_buf)) |
6176 | Vcode_conversion_reused_work_buf | |
857dccb0 | 6177 | = Fget_buffer_create (build_string (" *code-converting-work<0>*")); |
4776e638 | 6178 | buf = Vcode_conversion_reused_work_buf; |
e133c8fa | 6179 | } |
df7492f9 | 6180 | else |
d46c5b12 | 6181 | { |
4776e638 | 6182 | if (depth < 0) |
aaaf0b1e | 6183 | { |
857dccb0 | 6184 | name = build_string (" *code-converting-work*"); |
4776e638 | 6185 | name = Fgenerate_new_buffer_name (name, Qnil); |
aaaf0b1e | 6186 | } |
4776e638 | 6187 | else |
9861e777 | 6188 | { |
4776e638 | 6189 | char str[128]; |
d46c5b12 | 6190 | |
857dccb0 | 6191 | sprintf (str, " *code-converting-work*<%d>", depth); |
4776e638 KH |
6192 | name = build_string (str); |
6193 | } | |
6194 | buf = Fget_buffer_create (name); | |
b73bfc1c | 6195 | } |
df7492f9 KH |
6196 | set_buffer_internal (XBUFFER (buf)); |
6197 | current_buffer->undo_list = Qt; | |
6198 | Ferase_buffer (); | |
8f924df7 | 6199 | Fset_buffer_multibyte (multibytep ? Qt : Qnil); |
df7492f9 KH |
6200 | set_buffer_internal (current); |
6201 | return buf; | |
6202 | } | |
d46c5b12 | 6203 | |
4776e638 KH |
6204 | static Lisp_Object |
6205 | code_conversion_restore (buffer) | |
6206 | Lisp_Object buffer; | |
6207 | { | |
6208 | Lisp_Object workbuf; | |
6209 | ||
6210 | workbuf = XCAR (Vcode_conversion_work_buf_list); | |
6211 | if (! NILP (workbuf) | |
6212 | && ! EQ (workbuf, Vcode_conversion_reused_work_buf) | |
6213 | && ! NILP (Fbuffer_live_p (workbuf))) | |
6214 | Fkill_buffer (workbuf); | |
6215 | Vcode_conversion_work_buf_list = XCDR (Vcode_conversion_work_buf_list); | |
6216 | set_buffer_internal (XBUFFER (buffer)); | |
6217 | return Qnil; | |
6218 | } | |
b73bfc1c | 6219 | |
4776e638 KH |
6220 | static Lisp_Object |
6221 | code_conversion_save (buffer, with_work_buf, multibyte) | |
6222 | Lisp_Object buffer; | |
6223 | int with_work_buf, multibyte; | |
df7492f9 | 6224 | { |
4776e638 | 6225 | Lisp_Object workbuf; |
b73bfc1c | 6226 | |
4776e638 | 6227 | if (with_work_buf) |
b73bfc1c | 6228 | { |
4776e638 | 6229 | int depth = XINT (Flength (Vcode_conversion_work_buf_list)); |
b73bfc1c | 6230 | |
4776e638 | 6231 | workbuf = make_conversion_work_buffer (multibyte, depth); |
4ed46869 | 6232 | } |
4776e638 KH |
6233 | else |
6234 | workbuf = Qnil; | |
6235 | Vcode_conversion_work_buf_list | |
6236 | = Fcons (workbuf, Vcode_conversion_work_buf_list); | |
6237 | record_unwind_protect (code_conversion_restore, buffer); | |
6238 | return workbuf; | |
df7492f9 | 6239 | } |
d46c5b12 | 6240 | |
df7492f9 KH |
6241 | int |
6242 | decode_coding_gap (coding, chars, bytes) | |
6243 | struct coding_system *coding; | |
6244 | EMACS_INT chars, bytes; | |
6245 | { | |
6246 | int count = specpdl_ptr - specpdl; | |
5e5c78be | 6247 | Lisp_Object attrs; |
4776e638 | 6248 | Lisp_Object buffer; |
fb88bf2d | 6249 | |
4776e638 KH |
6250 | buffer = Fcurrent_buffer (); |
6251 | code_conversion_save (buffer, 0, 0); | |
ec6d2bb8 | 6252 | |
4776e638 | 6253 | coding->src_object = buffer; |
df7492f9 KH |
6254 | coding->src_chars = chars; |
6255 | coding->src_bytes = bytes; | |
6256 | coding->src_pos = -chars; | |
6257 | coding->src_pos_byte = -bytes; | |
6258 | coding->src_multibyte = chars < bytes; | |
5e5c78be | 6259 | coding->dst_object = buffer; |
df7492f9 KH |
6260 | coding->dst_pos = PT; |
6261 | coding->dst_pos_byte = PT_BYTE; | |
71c81426 | 6262 | coding->dst_multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
98725083 | 6263 | coding->mode |= CODING_MODE_LAST_BLOCK; |
4ed46869 | 6264 | |
df7492f9 KH |
6265 | if (CODING_REQUIRE_DETECTION (coding)) |
6266 | detect_coding (coding); | |
8f924df7 | 6267 | |
df7492f9 | 6268 | decode_coding (coding); |
d46c5b12 | 6269 | |
5e5c78be KH |
6270 | attrs = CODING_ID_ATTRS (coding->id); |
6271 | if (! NILP (CODING_ATTR_POST_READ (attrs))) | |
b73bfc1c | 6272 | { |
5e5c78be KH |
6273 | EMACS_INT prev_Z = Z, prev_Z_BYTE = Z_BYTE; |
6274 | Lisp_Object val; | |
6275 | ||
6276 | TEMP_SET_PT_BOTH (coding->dst_pos, coding->dst_pos_byte); | |
5e5c78be KH |
6277 | val = call1 (CODING_ATTR_POST_READ (attrs), |
6278 | make_number (coding->produced_char)); | |
5e5c78be KH |
6279 | CHECK_NATNUM (val); |
6280 | coding->produced_char += Z - prev_Z; | |
6281 | coding->produced += Z_BYTE - prev_Z_BYTE; | |
b73bfc1c | 6282 | } |
4ed46869 | 6283 | |
df7492f9 | 6284 | unbind_to (count, Qnil); |
b73bfc1c KH |
6285 | return coding->result; |
6286 | } | |
52d41803 | 6287 | |
4ed46869 | 6288 | int |
df7492f9 | 6289 | encode_coding_gap (coding, chars, bytes) |
4ed46869 | 6290 | struct coding_system *coding; |
df7492f9 | 6291 | EMACS_INT chars, bytes; |
4ed46869 | 6292 | { |
df7492f9 KH |
6293 | int count = specpdl_ptr - specpdl; |
6294 | Lisp_Object buffer; | |
4ed46869 | 6295 | |
df7492f9 | 6296 | buffer = Fcurrent_buffer (); |
4776e638 | 6297 | code_conversion_save (buffer, 0, 0); |
4ed46869 | 6298 | |
df7492f9 KH |
6299 | coding->src_object = buffer; |
6300 | coding->src_chars = chars; | |
6301 | coding->src_bytes = bytes; | |
6302 | coding->src_pos = -chars; | |
6303 | coding->src_pos_byte = -bytes; | |
6304 | coding->src_multibyte = chars < bytes; | |
6305 | coding->dst_object = coding->src_object; | |
6306 | coding->dst_pos = PT; | |
6307 | coding->dst_pos_byte = PT_BYTE; | |
4ed46869 | 6308 | |
df7492f9 | 6309 | encode_coding (coding); |
b73bfc1c | 6310 | |
df7492f9 KH |
6311 | unbind_to (count, Qnil); |
6312 | return coding->result; | |
6313 | } | |
4ed46869 | 6314 | |
d46c5b12 | 6315 | |
df7492f9 KH |
6316 | /* Decode the text in the range FROM/FROM_BYTE and TO/TO_BYTE in |
6317 | SRC_OBJECT into DST_OBJECT by coding context CODING. | |
b73bfc1c | 6318 | |
df7492f9 | 6319 | SRC_OBJECT is a buffer, a string, or Qnil. |
b73bfc1c | 6320 | |
df7492f9 KH |
6321 | If it is a buffer, the text is at point of the buffer. FROM and TO |
6322 | are positions in the buffer. | |
b73bfc1c | 6323 | |
df7492f9 KH |
6324 | If it is a string, the text is at the beginning of the string. |
6325 | FROM and TO are indices to the string. | |
4ed46869 | 6326 | |
df7492f9 KH |
6327 | If it is nil, the text is at coding->source. FROM and TO are |
6328 | indices to coding->source. | |
bb10be8b | 6329 | |
df7492f9 | 6330 | DST_OBJECT is a buffer, Qt, or Qnil. |
4ed46869 | 6331 | |
df7492f9 KH |
6332 | If it is a buffer, the decoded text is inserted at point of the |
6333 | buffer. If the buffer is the same as SRC_OBJECT, the source text | |
6334 | is deleted. | |
4ed46869 | 6335 | |
df7492f9 KH |
6336 | If it is Qt, a string is made from the decoded text, and |
6337 | set in CODING->dst_object. | |
d46c5b12 | 6338 | |
df7492f9 | 6339 | If it is Qnil, the decoded text is stored at CODING->destination. |
2cb26057 | 6340 | The caller must allocate CODING->dst_bytes bytes at |
df7492f9 KH |
6341 | CODING->destination by xmalloc. If the decoded text is longer than |
6342 | CODING->dst_bytes, CODING->destination is relocated by xrealloc. | |
6343 | */ | |
d46c5b12 | 6344 | |
df7492f9 KH |
6345 | void |
6346 | decode_coding_object (coding, src_object, from, from_byte, to, to_byte, | |
6347 | dst_object) | |
d46c5b12 | 6348 | struct coding_system *coding; |
df7492f9 KH |
6349 | Lisp_Object src_object; |
6350 | EMACS_INT from, from_byte, to, to_byte; | |
6351 | Lisp_Object dst_object; | |
d46c5b12 | 6352 | { |
df7492f9 KH |
6353 | int count = specpdl_ptr - specpdl; |
6354 | unsigned char *destination; | |
6355 | EMACS_INT dst_bytes; | |
6356 | EMACS_INT chars = to - from; | |
6357 | EMACS_INT bytes = to_byte - from_byte; | |
6358 | Lisp_Object attrs; | |
4776e638 KH |
6359 | Lisp_Object buffer; |
6360 | int saved_pt = -1, saved_pt_byte; | |
d46c5b12 | 6361 | |
4776e638 | 6362 | buffer = Fcurrent_buffer (); |
93dec019 | 6363 | |
df7492f9 | 6364 | if (NILP (dst_object)) |
d46c5b12 | 6365 | { |
df7492f9 KH |
6366 | destination = coding->destination; |
6367 | dst_bytes = coding->dst_bytes; | |
d46c5b12 | 6368 | } |
93dec019 | 6369 | |
df7492f9 KH |
6370 | coding->src_object = src_object; |
6371 | coding->src_chars = chars; | |
6372 | coding->src_bytes = bytes; | |
6373 | coding->src_multibyte = chars < bytes; | |
70ad9fc4 | 6374 | |
df7492f9 | 6375 | if (STRINGP (src_object)) |
d46c5b12 | 6376 | { |
df7492f9 KH |
6377 | coding->src_pos = from; |
6378 | coding->src_pos_byte = from_byte; | |
d46c5b12 | 6379 | } |
df7492f9 | 6380 | else if (BUFFERP (src_object)) |
88993dfd | 6381 | { |
df7492f9 KH |
6382 | set_buffer_internal (XBUFFER (src_object)); |
6383 | if (from != GPT) | |
6384 | move_gap_both (from, from_byte); | |
6385 | if (EQ (src_object, dst_object)) | |
fb88bf2d | 6386 | { |
4776e638 | 6387 | saved_pt = PT, saved_pt_byte = PT_BYTE; |
df7492f9 KH |
6388 | TEMP_SET_PT_BOTH (from, from_byte); |
6389 | del_range_both (from, from_byte, to, to_byte, 1); | |
6390 | coding->src_pos = -chars; | |
6391 | coding->src_pos_byte = -bytes; | |
fb88bf2d | 6392 | } |
df7492f9 | 6393 | else |
fb88bf2d | 6394 | { |
df7492f9 KH |
6395 | coding->src_pos = from; |
6396 | coding->src_pos_byte = from_byte; | |
fb88bf2d | 6397 | } |
88993dfd KH |
6398 | } |
6399 | ||
df7492f9 KH |
6400 | if (CODING_REQUIRE_DETECTION (coding)) |
6401 | detect_coding (coding); | |
6402 | attrs = CODING_ID_ATTRS (coding->id); | |
d46c5b12 | 6403 | |
2cb26057 KH |
6404 | if (EQ (dst_object, Qt) |
6405 | || (! NILP (CODING_ATTR_POST_READ (attrs)) | |
6406 | && NILP (dst_object))) | |
b73bfc1c | 6407 | { |
4776e638 | 6408 | coding->dst_object = code_conversion_save (buffer, 1, 1); |
df7492f9 KH |
6409 | coding->dst_pos = BEG; |
6410 | coding->dst_pos_byte = BEG_BYTE; | |
6411 | coding->dst_multibyte = 1; | |
b73bfc1c | 6412 | } |
df7492f9 | 6413 | else if (BUFFERP (dst_object)) |
d46c5b12 | 6414 | { |
4776e638 | 6415 | code_conversion_save (buffer, 0, 0); |
df7492f9 KH |
6416 | coding->dst_object = dst_object; |
6417 | coding->dst_pos = BUF_PT (XBUFFER (dst_object)); | |
6418 | coding->dst_pos_byte = BUF_PT_BYTE (XBUFFER (dst_object)); | |
6419 | coding->dst_multibyte | |
6420 | = ! NILP (XBUFFER (dst_object)->enable_multibyte_characters); | |
d46c5b12 KH |
6421 | } |
6422 | else | |
6423 | { | |
4776e638 | 6424 | code_conversion_save (buffer, 0, 0); |
df7492f9 KH |
6425 | coding->dst_object = Qnil; |
6426 | coding->dst_multibyte = 1; | |
d46c5b12 KH |
6427 | } |
6428 | ||
df7492f9 | 6429 | decode_coding (coding); |
fa46990e | 6430 | |
df7492f9 KH |
6431 | if (BUFFERP (coding->dst_object)) |
6432 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
d46c5b12 | 6433 | |
df7492f9 | 6434 | if (! NILP (CODING_ATTR_POST_READ (attrs))) |
d46c5b12 | 6435 | { |
df7492f9 KH |
6436 | struct gcpro gcpro1, gcpro2; |
6437 | EMACS_INT prev_Z = Z, prev_Z_BYTE = Z_BYTE; | |
2b4f9037 | 6438 | Lisp_Object val; |
d46c5b12 | 6439 | |
c0cc7f7f | 6440 | TEMP_SET_PT_BOTH (coding->dst_pos, coding->dst_pos_byte); |
df7492f9 KH |
6441 | GCPRO2 (coding->src_object, coding->dst_object); |
6442 | val = call1 (CODING_ATTR_POST_READ (attrs), | |
6443 | make_number (coding->produced_char)); | |
6444 | UNGCPRO; | |
6445 | CHECK_NATNUM (val); | |
6446 | coding->produced_char += Z - prev_Z; | |
6447 | coding->produced += Z_BYTE - prev_Z_BYTE; | |
d46c5b12 | 6448 | } |
de79a6a5 | 6449 | |
df7492f9 | 6450 | if (EQ (dst_object, Qt)) |
ec6d2bb8 | 6451 | { |
df7492f9 KH |
6452 | coding->dst_object = Fbuffer_string (); |
6453 | } | |
6454 | else if (NILP (dst_object) && BUFFERP (coding->dst_object)) | |
6455 | { | |
6456 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
6457 | if (dst_bytes < coding->produced) | |
6458 | { | |
6459 | destination | |
6460 | = (unsigned char *) xrealloc (destination, coding->produced); | |
6461 | if (! destination) | |
6462 | { | |
6463 | coding->result = CODING_RESULT_INSUFFICIENT_DST; | |
6464 | unbind_to (count, Qnil); | |
6465 | return; | |
6466 | } | |
6467 | if (BEGV < GPT && GPT < BEGV + coding->produced_char) | |
6468 | move_gap_both (BEGV, BEGV_BYTE); | |
6469 | bcopy (BEGV_ADDR, destination, coding->produced); | |
6470 | coding->destination = destination; | |
d46c5b12 | 6471 | } |
ec6d2bb8 | 6472 | } |
b73bfc1c | 6473 | |
4776e638 KH |
6474 | if (saved_pt >= 0) |
6475 | { | |
6476 | /* This is the case of: | |
6477 | (BUFFERP (src_object) && EQ (src_object, dst_object)) | |
6478 | As we have moved PT while replacing the original buffer | |
6479 | contents, we must recover it now. */ | |
6480 | set_buffer_internal (XBUFFER (src_object)); | |
6481 | if (saved_pt < from) | |
6482 | TEMP_SET_PT_BOTH (saved_pt, saved_pt_byte); | |
6483 | else if (saved_pt < from + chars) | |
6484 | TEMP_SET_PT_BOTH (from, from_byte); | |
6485 | else if (! NILP (current_buffer->enable_multibyte_characters)) | |
6486 | TEMP_SET_PT_BOTH (saved_pt + (coding->produced_char - chars), | |
6487 | saved_pt_byte + (coding->produced - bytes)); | |
6488 | else | |
6489 | TEMP_SET_PT_BOTH (saved_pt + (coding->produced - bytes), | |
6490 | saved_pt_byte + (coding->produced - bytes)); | |
d46c5b12 | 6491 | } |
4776e638 | 6492 | |
df7492f9 | 6493 | unbind_to (count, Qnil); |
d46c5b12 KH |
6494 | } |
6495 | ||
d46c5b12 | 6496 | |
df7492f9 KH |
6497 | void |
6498 | encode_coding_object (coding, src_object, from, from_byte, to, to_byte, | |
6499 | dst_object) | |
d46c5b12 | 6500 | struct coding_system *coding; |
df7492f9 KH |
6501 | Lisp_Object src_object; |
6502 | EMACS_INT from, from_byte, to, to_byte; | |
6503 | Lisp_Object dst_object; | |
d46c5b12 | 6504 | { |
b73bfc1c | 6505 | int count = specpdl_ptr - specpdl; |
df7492f9 KH |
6506 | EMACS_INT chars = to - from; |
6507 | EMACS_INT bytes = to_byte - from_byte; | |
6508 | Lisp_Object attrs; | |
4776e638 KH |
6509 | Lisp_Object buffer; |
6510 | int saved_pt = -1, saved_pt_byte; | |
df7492f9 | 6511 | |
4776e638 | 6512 | buffer = Fcurrent_buffer (); |
df7492f9 KH |
6513 | |
6514 | coding->src_object = src_object; | |
6515 | coding->src_chars = chars; | |
6516 | coding->src_bytes = bytes; | |
6517 | coding->src_multibyte = chars < bytes; | |
6518 | ||
6519 | attrs = CODING_ID_ATTRS (coding->id); | |
6520 | ||
6521 | if (! NILP (CODING_ATTR_PRE_WRITE (attrs))) | |
6bac5b12 | 6522 | { |
4776e638 KH |
6523 | coding->src_object = code_conversion_save (buffer, 1, |
6524 | coding->src_multibyte); | |
df7492f9 KH |
6525 | set_buffer_internal (XBUFFER (coding->src_object)); |
6526 | if (STRINGP (src_object)) | |
6527 | insert_from_string (src_object, from, from_byte, chars, bytes, 0); | |
6528 | else if (BUFFERP (src_object)) | |
6529 | insert_from_buffer (XBUFFER (src_object), from, chars, 0); | |
6530 | else | |
6531 | insert_1_both (coding->source + from, chars, bytes, 0, 0, 0); | |
d46c5b12 | 6532 | |
df7492f9 KH |
6533 | if (EQ (src_object, dst_object)) |
6534 | { | |
6535 | set_buffer_internal (XBUFFER (src_object)); | |
4776e638 | 6536 | saved_pt = PT, saved_pt_byte = PT_BYTE; |
df7492f9 KH |
6537 | del_range_both (from, from_byte, to, to_byte, 1); |
6538 | set_buffer_internal (XBUFFER (coding->src_object)); | |
6539 | } | |
6540 | ||
ac87bbef KH |
6541 | call2 (CODING_ATTR_PRE_WRITE (attrs), |
6542 | make_number (BEG), make_number (Z)); | |
6543 | coding->src_object = Fcurrent_buffer (); | |
df7492f9 KH |
6544 | if (BEG != GPT) |
6545 | move_gap_both (BEG, BEG_BYTE); | |
6546 | coding->src_chars = Z - BEG; | |
6547 | coding->src_bytes = Z_BYTE - BEG_BYTE; | |
6548 | coding->src_pos = BEG; | |
6549 | coding->src_pos_byte = BEG_BYTE; | |
6550 | coding->src_multibyte = Z < Z_BYTE; | |
6551 | } | |
6552 | else if (STRINGP (src_object)) | |
d46c5b12 | 6553 | { |
4776e638 | 6554 | code_conversion_save (buffer, 0, 0); |
df7492f9 KH |
6555 | coding->src_pos = from; |
6556 | coding->src_pos_byte = from_byte; | |
b73bfc1c | 6557 | } |
df7492f9 | 6558 | else if (BUFFERP (src_object)) |
b73bfc1c | 6559 | { |
4776e638 | 6560 | code_conversion_save (buffer, 0, 0); |
df7492f9 | 6561 | set_buffer_internal (XBUFFER (src_object)); |
df7492f9 | 6562 | if (EQ (src_object, dst_object)) |
d46c5b12 | 6563 | { |
4776e638 | 6564 | saved_pt = PT, saved_pt_byte = PT_BYTE; |
ff0dacd7 KH |
6565 | coding->src_object = del_range_1 (from, to, 1, 1); |
6566 | coding->src_pos = 0; | |
6567 | coding->src_pos_byte = 0; | |
d46c5b12 | 6568 | } |
df7492f9 | 6569 | else |
d46c5b12 | 6570 | { |
ff0dacd7 KH |
6571 | if (from < GPT && to >= GPT) |
6572 | move_gap_both (from, from_byte); | |
df7492f9 KH |
6573 | coding->src_pos = from; |
6574 | coding->src_pos_byte = from_byte; | |
d46c5b12 | 6575 | } |
d46c5b12 | 6576 | } |
4776e638 KH |
6577 | else |
6578 | code_conversion_save (buffer, 0, 0); | |
d46c5b12 | 6579 | |
df7492f9 | 6580 | if (BUFFERP (dst_object)) |
88993dfd | 6581 | { |
df7492f9 | 6582 | coding->dst_object = dst_object; |
28f67a95 KH |
6583 | if (EQ (src_object, dst_object)) |
6584 | { | |
6585 | coding->dst_pos = from; | |
6586 | coding->dst_pos_byte = from_byte; | |
6587 | } | |
6588 | else | |
6589 | { | |
6590 | coding->dst_pos = BUF_PT (XBUFFER (dst_object)); | |
6591 | coding->dst_pos_byte = BUF_PT_BYTE (XBUFFER (dst_object)); | |
6592 | } | |
df7492f9 KH |
6593 | coding->dst_multibyte |
6594 | = ! NILP (XBUFFER (dst_object)->enable_multibyte_characters); | |
88993dfd | 6595 | } |
df7492f9 | 6596 | else if (EQ (dst_object, Qt)) |
d46c5b12 | 6597 | { |
df7492f9 | 6598 | coding->dst_object = Qnil; |
df7492f9 | 6599 | coding->dst_bytes = coding->src_chars; |
ac87bbef KH |
6600 | if (coding->dst_bytes == 0) |
6601 | coding->dst_bytes = 1; | |
6602 | coding->destination = (unsigned char *) xmalloc (coding->dst_bytes); | |
df7492f9 | 6603 | coding->dst_multibyte = 0; |
d46c5b12 KH |
6604 | } |
6605 | else | |
6606 | { | |
df7492f9 KH |
6607 | coding->dst_object = Qnil; |
6608 | coding->dst_multibyte = 0; | |
d46c5b12 KH |
6609 | } |
6610 | ||
df7492f9 | 6611 | encode_coding (coding); |
d46c5b12 | 6612 | |
df7492f9 | 6613 | if (EQ (dst_object, Qt)) |
d46c5b12 | 6614 | { |
df7492f9 KH |
6615 | if (BUFFERP (coding->dst_object)) |
6616 | coding->dst_object = Fbuffer_string (); | |
6617 | else | |
d46c5b12 | 6618 | { |
df7492f9 KH |
6619 | coding->dst_object |
6620 | = make_unibyte_string ((char *) coding->destination, | |
6621 | coding->produced); | |
6622 | xfree (coding->destination); | |
d46c5b12 | 6623 | } |
4ed46869 | 6624 | } |
d46c5b12 | 6625 | |
4776e638 KH |
6626 | if (saved_pt >= 0) |
6627 | { | |
6628 | /* This is the case of: | |
6629 | (BUFFERP (src_object) && EQ (src_object, dst_object)) | |
6630 | As we have moved PT while replacing the original buffer | |
6631 | contents, we must recover it now. */ | |
6632 | set_buffer_internal (XBUFFER (src_object)); | |
6633 | if (saved_pt < from) | |
6634 | TEMP_SET_PT_BOTH (saved_pt, saved_pt_byte); | |
6635 | else if (saved_pt < from + chars) | |
6636 | TEMP_SET_PT_BOTH (from, from_byte); | |
6637 | else if (! NILP (current_buffer->enable_multibyte_characters)) | |
6638 | TEMP_SET_PT_BOTH (saved_pt + (coding->produced_char - chars), | |
6639 | saved_pt_byte + (coding->produced - bytes)); | |
d46c5b12 | 6640 | else |
4776e638 KH |
6641 | TEMP_SET_PT_BOTH (saved_pt + (coding->produced - bytes), |
6642 | saved_pt_byte + (coding->produced - bytes)); | |
6643 | } | |
6644 | ||
df7492f9 | 6645 | unbind_to (count, Qnil); |
b73bfc1c KH |
6646 | } |
6647 | ||
df7492f9 | 6648 | |
b73bfc1c | 6649 | Lisp_Object |
df7492f9 | 6650 | preferred_coding_system () |
b73bfc1c | 6651 | { |
df7492f9 | 6652 | int id = coding_categories[coding_priorities[0]].id; |
2391eaa4 | 6653 | |
df7492f9 | 6654 | return CODING_ID_NAME (id); |
4ed46869 KH |
6655 | } |
6656 | ||
6657 | \f | |
6658 | #ifdef emacs | |
1397dc18 | 6659 | /*** 8. Emacs Lisp library functions ***/ |
4ed46869 | 6660 | |
4ed46869 | 6661 | DEFUN ("coding-system-p", Fcoding_system_p, Scoding_system_p, 1, 1, 0, |
48b0f3ae | 6662 | doc: /* Return t if OBJECT is nil or a coding-system. |
df7492f9 | 6663 | See the documentation of `define-coding-system' for information |
48b0f3ae PJ |
6664 | about coding-system objects. */) |
6665 | (obj) | |
4ed46869 KH |
6666 | Lisp_Object obj; |
6667 | { | |
df7492f9 | 6668 | return ((NILP (obj) || CODING_SYSTEM_P (obj)) ? Qt : Qnil); |
4ed46869 KH |
6669 | } |
6670 | ||
9d991de8 RS |
6671 | DEFUN ("read-non-nil-coding-system", Fread_non_nil_coding_system, |
6672 | Sread_non_nil_coding_system, 1, 1, 0, | |
48b0f3ae PJ |
6673 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. */) |
6674 | (prompt) | |
4ed46869 KH |
6675 | Lisp_Object prompt; |
6676 | { | |
e0e989f6 | 6677 | Lisp_Object val; |
9d991de8 RS |
6678 | do |
6679 | { | |
4608c386 KH |
6680 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
6681 | Qt, Qnil, Qcoding_system_history, Qnil, Qnil); | |
9d991de8 | 6682 | } |
8f924df7 | 6683 | while (SCHARS (val) == 0); |
e0e989f6 | 6684 | return (Fintern (val, Qnil)); |
4ed46869 KH |
6685 | } |
6686 | ||
9b787f3e | 6687 | DEFUN ("read-coding-system", Fread_coding_system, Sread_coding_system, 1, 2, 0, |
48b0f3ae PJ |
6688 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. |
6689 | If the user enters null input, return second argument DEFAULT-CODING-SYSTEM. */) | |
6690 | (prompt, default_coding_system) | |
9b787f3e | 6691 | Lisp_Object prompt, default_coding_system; |
4ed46869 | 6692 | { |
f44d27ce | 6693 | Lisp_Object val; |
9b787f3e | 6694 | if (SYMBOLP (default_coding_system)) |
a3181084 | 6695 | XSETSTRING (default_coding_system, XPNTR (SYMBOL_NAME (default_coding_system))); |
4608c386 | 6696 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
9b787f3e RS |
6697 | Qt, Qnil, Qcoding_system_history, |
6698 | default_coding_system, Qnil); | |
8f924df7 | 6699 | return (SCHARS (val) == 0 ? Qnil : Fintern (val, Qnil)); |
4ed46869 KH |
6700 | } |
6701 | ||
6702 | DEFUN ("check-coding-system", Fcheck_coding_system, Scheck_coding_system, | |
6703 | 1, 1, 0, | |
48b0f3ae | 6704 | doc: /* Check validity of CODING-SYSTEM. |
b054002f | 6705 | If valid, return CODING-SYSTEM, else signal a `coding-system-error' error. */) |
df7492f9 | 6706 | (coding_system) |
4ed46869 KH |
6707 | Lisp_Object coding_system; |
6708 | { | |
b7826503 | 6709 | CHECK_SYMBOL (coding_system); |
4ed46869 KH |
6710 | if (!NILP (Fcoding_system_p (coding_system))) |
6711 | return coding_system; | |
6712 | while (1) | |
02ba4723 | 6713 | Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil)); |
4ed46869 | 6714 | } |
df7492f9 | 6715 | |
3a73fa5d | 6716 | \f |
89528eb3 KH |
6717 | /* Detect how the bytes at SRC of length SRC_BYTES are encoded. If |
6718 | HIGHEST is nonzero, return the coding system of the highest | |
6719 | priority among the detected coding systems. Otherwize return a | |
6720 | list of detected coding systems sorted by their priorities. If | |
6721 | MULTIBYTEP is nonzero, it is assumed that the bytes are in correct | |
6722 | multibyte form but contains only ASCII and eight-bit chars. | |
6723 | Otherwise, the bytes are raw bytes. | |
6724 | ||
6725 | CODING-SYSTEM controls the detection as below: | |
6726 | ||
6727 | If it is nil, detect both text-format and eol-format. If the | |
6728 | text-format part of CODING-SYSTEM is already specified | |
6729 | (e.g. `iso-latin-1'), detect only eol-format. If the eol-format | |
6730 | part of CODING-SYSTEM is already specified (e.g. `undecided-unix'), | |
6731 | detect only text-format. */ | |
6732 | ||
d46c5b12 | 6733 | Lisp_Object |
df7492f9 | 6734 | detect_coding_system (src, src_bytes, highest, multibytep, coding_system) |
8f924df7 | 6735 | const unsigned char *src; |
d46c5b12 | 6736 | int src_bytes, highest; |
0a28aafb | 6737 | int multibytep; |
df7492f9 | 6738 | Lisp_Object coding_system; |
4ed46869 | 6739 | { |
8f924df7 | 6740 | const unsigned char *src_end = src + src_bytes; |
df7492f9 KH |
6741 | Lisp_Object attrs, eol_type; |
6742 | Lisp_Object val; | |
6743 | struct coding_system coding; | |
89528eb3 | 6744 | int id; |
ff0dacd7 | 6745 | struct coding_detection_info detect_info; |
b73bfc1c | 6746 | |
df7492f9 KH |
6747 | if (NILP (coding_system)) |
6748 | coding_system = Qundecided; | |
6749 | setup_coding_system (coding_system, &coding); | |
6750 | attrs = CODING_ID_ATTRS (coding.id); | |
6751 | eol_type = CODING_ID_EOL_TYPE (coding.id); | |
89528eb3 | 6752 | coding_system = CODING_ATTR_BASE_NAME (attrs); |
4ed46869 | 6753 | |
df7492f9 KH |
6754 | coding.source = src; |
6755 | coding.src_bytes = src_bytes; | |
6756 | coding.src_multibyte = multibytep; | |
6757 | coding.consumed = 0; | |
89528eb3 | 6758 | coding.mode |= CODING_MODE_LAST_BLOCK; |
d46c5b12 | 6759 | |
ff0dacd7 | 6760 | detect_info.checked = detect_info.found = detect_info.rejected = 0; |
d46c5b12 | 6761 | |
89528eb3 KH |
6762 | /* At first, detect text-format if necessary. */ |
6763 | if (XINT (CODING_ATTR_CATEGORY (attrs)) == coding_category_undecided) | |
4ed46869 | 6764 | { |
ff0dacd7 KH |
6765 | enum coding_category category; |
6766 | struct coding_system *this; | |
6767 | int c, i; | |
88993dfd | 6768 | |
df7492f9 | 6769 | for (; src < src_end; src++) |
4ed46869 | 6770 | { |
df7492f9 | 6771 | c = *src; |
89528eb3 KH |
6772 | if (c & 0x80 |
6773 | || (c < 0x20 && (c == ISO_CODE_ESC | |
6774 | || c == ISO_CODE_SI | |
584948ac | 6775 | || c == ISO_CODE_SO))) |
d46c5b12 | 6776 | break; |
4ed46869 | 6777 | } |
df7492f9 | 6778 | coding.head_ascii = src - coding.source; |
88993dfd | 6779 | |
df7492f9 KH |
6780 | if (src < src_end) |
6781 | for (i = 0; i < coding_category_raw_text; i++) | |
6782 | { | |
ff0dacd7 KH |
6783 | category = coding_priorities[i]; |
6784 | this = coding_categories + category; | |
b843d1ae | 6785 | |
df7492f9 KH |
6786 | if (this->id < 0) |
6787 | { | |
6788 | /* No coding system of this category is defined. */ | |
ff0dacd7 | 6789 | detect_info.rejected |= (1 << category); |
df7492f9 | 6790 | } |
ff0dacd7 | 6791 | else if (category >= coding_category_raw_text) |
89528eb3 | 6792 | continue; |
ff0dacd7 KH |
6793 | else if (detect_info.checked & (1 << category)) |
6794 | { | |
6795 | if (highest | |
6796 | && (detect_info.found & (1 << category))) | |
6797 | break; | |
6798 | } | |
df7492f9 KH |
6799 | else |
6800 | { | |
ff0dacd7 | 6801 | if ((*(this->detector)) (&coding, &detect_info) |
89528eb3 | 6802 | && highest |
ff0dacd7 KH |
6803 | && (detect_info.found & (1 << category))) |
6804 | break; | |
df7492f9 KH |
6805 | } |
6806 | } | |
ec6d2bb8 | 6807 | |
ec6d2bb8 | 6808 | |
ff0dacd7 | 6809 | if (detect_info.rejected == CATEGORY_MASK_ANY) |
ec6d2bb8 | 6810 | { |
ff0dacd7 | 6811 | detect_info.found = CATEGORY_MASK_RAW_TEXT; |
89528eb3 KH |
6812 | id = coding_categories[coding_category_raw_text].id; |
6813 | val = Fcons (make_number (id), Qnil); | |
6814 | } | |
ff0dacd7 | 6815 | else if (! detect_info.rejected && ! detect_info.found) |
89528eb3 | 6816 | { |
ff0dacd7 | 6817 | detect_info.found = CATEGORY_MASK_ANY; |
89528eb3 KH |
6818 | id = coding_categories[coding_category_undecided].id; |
6819 | val = Fcons (make_number (id), Qnil); | |
6820 | } | |
6821 | else if (highest) | |
6822 | { | |
ff0dacd7 | 6823 | if (detect_info.found) |
ec6d2bb8 | 6824 | { |
ff0dacd7 KH |
6825 | detect_info.found = 1 << category; |
6826 | val = Fcons (make_number (this->id), Qnil); | |
6827 | } | |
6828 | else | |
6829 | for (i = 0; i < coding_category_raw_text; i++) | |
6830 | if (! (detect_info.rejected & (1 << coding_priorities[i]))) | |
6831 | { | |
6832 | detect_info.found = 1 << coding_priorities[i]; | |
6833 | id = coding_categories[coding_priorities[i]].id; | |
6834 | val = Fcons (make_number (id), Qnil); | |
6835 | break; | |
6836 | } | |
6837 | } | |
89528eb3 KH |
6838 | else |
6839 | { | |
ff0dacd7 KH |
6840 | int mask = detect_info.rejected | detect_info.found; |
6841 | int found = 0; | |
89528eb3 | 6842 | val = Qnil; |
ec6d2bb8 | 6843 | |
89528eb3 | 6844 | for (i = coding_category_raw_text - 1; i >= 0; i--) |
ff0dacd7 KH |
6845 | { |
6846 | category = coding_priorities[i]; | |
6847 | if (! (mask & (1 << category))) | |
ec6d2bb8 | 6848 | { |
ff0dacd7 KH |
6849 | found |= 1 << category; |
6850 | id = coding_categories[category].id; | |
6851 | val = Fcons (make_number (id), val); | |
6852 | } | |
6853 | } | |
6854 | for (i = coding_category_raw_text - 1; i >= 0; i--) | |
6855 | { | |
6856 | category = coding_priorities[i]; | |
6857 | if (detect_info.found & (1 << category)) | |
6858 | { | |
6859 | id = coding_categories[category].id; | |
6860 | val = Fcons (make_number (id), val); | |
ec6d2bb8 | 6861 | } |
ec6d2bb8 | 6862 | } |
ff0dacd7 | 6863 | detect_info.found |= found; |
ec6d2bb8 | 6864 | } |
ec6d2bb8 | 6865 | } |
df7492f9 KH |
6866 | else |
6867 | { | |
ff0dacd7 | 6868 | detect_info.found = 1 << XINT (CODING_ATTR_CATEGORY (attrs)); |
89528eb3 | 6869 | val = Fcons (make_number (coding.id), Qnil); |
4ed46869 | 6870 | } |
df7492f9 | 6871 | |
89528eb3 | 6872 | /* Then, detect eol-format if necessary. */ |
df7492f9 | 6873 | { |
89528eb3 | 6874 | int normal_eol = -1, utf_16_be_eol = -1, utf_16_le_eol; |
df7492f9 KH |
6875 | Lisp_Object tail; |
6876 | ||
89528eb3 KH |
6877 | if (VECTORP (eol_type)) |
6878 | { | |
ff0dacd7 | 6879 | if (detect_info.found & ~CATEGORY_MASK_UTF_16) |
89528eb3 KH |
6880 | normal_eol = detect_eol (coding.source, src_bytes, |
6881 | coding_category_raw_text); | |
ff0dacd7 KH |
6882 | if (detect_info.found & (CATEGORY_MASK_UTF_16_BE |
6883 | | CATEGORY_MASK_UTF_16_BE_NOSIG)) | |
89528eb3 KH |
6884 | utf_16_be_eol = detect_eol (coding.source, src_bytes, |
6885 | coding_category_utf_16_be); | |
ff0dacd7 KH |
6886 | if (detect_info.found & (CATEGORY_MASK_UTF_16_LE |
6887 | | CATEGORY_MASK_UTF_16_LE_NOSIG)) | |
89528eb3 KH |
6888 | utf_16_le_eol = detect_eol (coding.source, src_bytes, |
6889 | coding_category_utf_16_le); | |
6890 | } | |
6891 | else | |
6892 | { | |
6893 | if (EQ (eol_type, Qunix)) | |
6894 | normal_eol = utf_16_be_eol = utf_16_le_eol = EOL_SEEN_LF; | |
6895 | else if (EQ (eol_type, Qdos)) | |
6896 | normal_eol = utf_16_be_eol = utf_16_le_eol = EOL_SEEN_CRLF; | |
6897 | else | |
6898 | normal_eol = utf_16_be_eol = utf_16_le_eol = EOL_SEEN_CR; | |
6899 | } | |
6900 | ||
df7492f9 KH |
6901 | for (tail = val; CONSP (tail); tail = XCDR (tail)) |
6902 | { | |
89528eb3 | 6903 | enum coding_category category; |
df7492f9 | 6904 | int this_eol; |
89528eb3 KH |
6905 | |
6906 | id = XINT (XCAR (tail)); | |
6907 | attrs = CODING_ID_ATTRS (id); | |
6908 | category = XINT (CODING_ATTR_CATEGORY (attrs)); | |
6909 | eol_type = CODING_ID_EOL_TYPE (id); | |
df7492f9 KH |
6910 | if (VECTORP (eol_type)) |
6911 | { | |
89528eb3 KH |
6912 | if (category == coding_category_utf_16_be |
6913 | || category == coding_category_utf_16_be_nosig) | |
6914 | this_eol = utf_16_be_eol; | |
6915 | else if (category == coding_category_utf_16_le | |
6916 | || category == coding_category_utf_16_le_nosig) | |
6917 | this_eol = utf_16_le_eol; | |
df7492f9 | 6918 | else |
89528eb3 KH |
6919 | this_eol = normal_eol; |
6920 | ||
df7492f9 KH |
6921 | if (this_eol == EOL_SEEN_LF) |
6922 | XSETCAR (tail, AREF (eol_type, 0)); | |
6923 | else if (this_eol == EOL_SEEN_CRLF) | |
6924 | XSETCAR (tail, AREF (eol_type, 1)); | |
6925 | else if (this_eol == EOL_SEEN_CR) | |
6926 | XSETCAR (tail, AREF (eol_type, 2)); | |
89528eb3 KH |
6927 | else |
6928 | XSETCAR (tail, CODING_ID_NAME (id)); | |
df7492f9 | 6929 | } |
89528eb3 KH |
6930 | else |
6931 | XSETCAR (tail, CODING_ID_NAME (id)); | |
df7492f9 KH |
6932 | } |
6933 | } | |
ec6d2bb8 | 6934 | |
03699b14 | 6935 | return (highest ? XCAR (val) : val); |
ec6d2bb8 KH |
6936 | } |
6937 | ||
ec6d2bb8 | 6938 | |
d46c5b12 KH |
6939 | DEFUN ("detect-coding-region", Fdetect_coding_region, Sdetect_coding_region, |
6940 | 2, 3, 0, | |
48b0f3ae PJ |
6941 | doc: /* Detect coding system of the text in the region between START and END. |
6942 | Return a list of possible coding systems ordered by priority. | |
ec6d2bb8 | 6943 | |
48b0f3ae PJ |
6944 | If only ASCII characters are found, it returns a list of single element |
6945 | `undecided' or its subsidiary coding system according to a detected | |
6946 | end-of-line format. | |
ec6d2bb8 | 6947 | |
48b0f3ae PJ |
6948 | If optional argument HIGHEST is non-nil, return the coding system of |
6949 | highest priority. */) | |
6950 | (start, end, highest) | |
d46c5b12 KH |
6951 | Lisp_Object start, end, highest; |
6952 | { | |
6953 | int from, to; | |
6954 | int from_byte, to_byte; | |
ec6d2bb8 | 6955 | |
b7826503 PJ |
6956 | CHECK_NUMBER_COERCE_MARKER (start); |
6957 | CHECK_NUMBER_COERCE_MARKER (end); | |
ec6d2bb8 | 6958 | |
d46c5b12 KH |
6959 | validate_region (&start, &end); |
6960 | from = XINT (start), to = XINT (end); | |
6961 | from_byte = CHAR_TO_BYTE (from); | |
6962 | to_byte = CHAR_TO_BYTE (to); | |
ec6d2bb8 | 6963 | |
d46c5b12 KH |
6964 | if (from < GPT && to >= GPT) |
6965 | move_gap_both (to, to_byte); | |
c210f766 | 6966 | |
d46c5b12 | 6967 | return detect_coding_system (BYTE_POS_ADDR (from_byte), |
df7492f9 | 6968 | to_byte - from_byte, |
0a28aafb KH |
6969 | !NILP (highest), |
6970 | !NILP (current_buffer | |
df7492f9 KH |
6971 | ->enable_multibyte_characters), |
6972 | Qnil); | |
ec6d2bb8 KH |
6973 | } |
6974 | ||
d46c5b12 KH |
6975 | DEFUN ("detect-coding-string", Fdetect_coding_string, Sdetect_coding_string, |
6976 | 1, 2, 0, | |
48b0f3ae PJ |
6977 | doc: /* Detect coding system of the text in STRING. |
6978 | Return a list of possible coding systems ordered by priority. | |
fb88bf2d | 6979 | |
48b0f3ae PJ |
6980 | If only ASCII characters are found, it returns a list of single element |
6981 | `undecided' or its subsidiary coding system according to a detected | |
6982 | end-of-line format. | |
d46c5b12 | 6983 | |
48b0f3ae PJ |
6984 | If optional argument HIGHEST is non-nil, return the coding system of |
6985 | highest priority. */) | |
6986 | (string, highest) | |
d46c5b12 KH |
6987 | Lisp_Object string, highest; |
6988 | { | |
b7826503 | 6989 | CHECK_STRING (string); |
b73bfc1c | 6990 | |
8f924df7 KH |
6991 | return detect_coding_system (SDATA (string), SBYTES (string), |
6992 | !NILP (highest), STRING_MULTIBYTE (string), | |
df7492f9 | 6993 | Qnil); |
4ed46869 | 6994 | } |
4ed46869 | 6995 | |
b73bfc1c | 6996 | |
df7492f9 KH |
6997 | static INLINE int |
6998 | char_encodable_p (c, attrs) | |
6999 | int c; | |
7000 | Lisp_Object attrs; | |
05e6f5dc | 7001 | { |
df7492f9 | 7002 | Lisp_Object tail; |
df7492f9 | 7003 | struct charset *charset; |
d46c5b12 | 7004 | |
df7492f9 KH |
7005 | for (tail = CODING_ATTR_CHARSET_LIST (attrs); |
7006 | CONSP (tail); tail = XCDR (tail)) | |
e133c8fa | 7007 | { |
df7492f9 KH |
7008 | charset = CHARSET_FROM_ID (XINT (XCAR (tail))); |
7009 | if (CHAR_CHARSET_P (c, charset)) | |
7010 | break; | |
e133c8fa | 7011 | } |
df7492f9 | 7012 | return (! NILP (tail)); |
05e6f5dc | 7013 | } |
83fa074f | 7014 | |
fb88bf2d | 7015 | |
df7492f9 KH |
7016 | /* Return a list of coding systems that safely encode the text between |
7017 | START and END. If EXCLUDE is non-nil, it is a list of coding | |
7018 | systems not to check. The returned list doesn't contain any such | |
48468dac | 7019 | coding systems. In any case, if the text contains only ASCII or is |
df7492f9 | 7020 | unibyte, return t. */ |
e077cc80 | 7021 | |
df7492f9 KH |
7022 | DEFUN ("find-coding-systems-region-internal", |
7023 | Ffind_coding_systems_region_internal, | |
7024 | Sfind_coding_systems_region_internal, 2, 3, 0, | |
7025 | doc: /* Internal use only. */) | |
7026 | (start, end, exclude) | |
7027 | Lisp_Object start, end, exclude; | |
7028 | { | |
7029 | Lisp_Object coding_attrs_list, safe_codings; | |
7030 | EMACS_INT start_byte, end_byte; | |
7c78e542 | 7031 | const unsigned char *p, *pbeg, *pend; |
df7492f9 KH |
7032 | int c; |
7033 | Lisp_Object tail, elt; | |
d46c5b12 | 7034 | |
df7492f9 KH |
7035 | if (STRINGP (start)) |
7036 | { | |
7037 | if (!STRING_MULTIBYTE (start) | |
8f924df7 | 7038 | || SCHARS (start) == SBYTES (start)) |
df7492f9 KH |
7039 | return Qt; |
7040 | start_byte = 0; | |
8f924df7 | 7041 | end_byte = SBYTES (start); |
df7492f9 KH |
7042 | } |
7043 | else | |
d46c5b12 | 7044 | { |
df7492f9 KH |
7045 | CHECK_NUMBER_COERCE_MARKER (start); |
7046 | CHECK_NUMBER_COERCE_MARKER (end); | |
7047 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) | |
7048 | args_out_of_range (start, end); | |
7049 | if (NILP (current_buffer->enable_multibyte_characters)) | |
7050 | return Qt; | |
7051 | start_byte = CHAR_TO_BYTE (XINT (start)); | |
7052 | end_byte = CHAR_TO_BYTE (XINT (end)); | |
7053 | if (XINT (end) - XINT (start) == end_byte - start_byte) | |
7054 | return Qt; | |
d46c5b12 | 7055 | |
e1c23804 | 7056 | if (XINT (start) < GPT && XINT (end) > GPT) |
d46c5b12 | 7057 | { |
e1c23804 DL |
7058 | if ((GPT - XINT (start)) < (XINT (end) - GPT)) |
7059 | move_gap_both (XINT (start), start_byte); | |
df7492f9 | 7060 | else |
e1c23804 | 7061 | move_gap_both (XINT (end), end_byte); |
d46c5b12 KH |
7062 | } |
7063 | } | |
7064 | ||
df7492f9 KH |
7065 | coding_attrs_list = Qnil; |
7066 | for (tail = Vcoding_system_list; CONSP (tail); tail = XCDR (tail)) | |
7067 | if (NILP (exclude) | |
7068 | || NILP (Fmemq (XCAR (tail), exclude))) | |
7069 | { | |
7070 | Lisp_Object attrs; | |
d46c5b12 | 7071 | |
df7492f9 KH |
7072 | attrs = AREF (CODING_SYSTEM_SPEC (XCAR (tail)), 0); |
7073 | if (EQ (XCAR (tail), CODING_ATTR_BASE_NAME (attrs)) | |
7074 | && ! EQ (CODING_ATTR_TYPE (attrs), Qundecided)) | |
7075 | coding_attrs_list = Fcons (attrs, coding_attrs_list); | |
7076 | } | |
d46c5b12 | 7077 | |
df7492f9 | 7078 | if (STRINGP (start)) |
8f924df7 | 7079 | p = pbeg = SDATA (start); |
df7492f9 KH |
7080 | else |
7081 | p = pbeg = BYTE_POS_ADDR (start_byte); | |
7082 | pend = p + (end_byte - start_byte); | |
b843d1ae | 7083 | |
df7492f9 KH |
7084 | while (p < pend && ASCII_BYTE_P (*p)) p++; |
7085 | while (p < pend && ASCII_BYTE_P (*(pend - 1))) pend--; | |
d46c5b12 | 7086 | |
05e6f5dc | 7087 | while (p < pend) |
72d1a715 | 7088 | { |
df7492f9 KH |
7089 | if (ASCII_BYTE_P (*p)) |
7090 | p++; | |
72d1a715 RS |
7091 | else |
7092 | { | |
df7492f9 | 7093 | c = STRING_CHAR_ADVANCE (p); |
12410ef1 | 7094 | |
df7492f9 KH |
7095 | charset_map_loaded = 0; |
7096 | for (tail = coding_attrs_list; CONSP (tail);) | |
7097 | { | |
7098 | elt = XCAR (tail); | |
7099 | if (NILP (elt)) | |
7100 | tail = XCDR (tail); | |
7101 | else if (char_encodable_p (c, elt)) | |
7102 | tail = XCDR (tail); | |
7103 | else if (CONSP (XCDR (tail))) | |
7104 | { | |
7105 | XSETCAR (tail, XCAR (XCDR (tail))); | |
7106 | XSETCDR (tail, XCDR (XCDR (tail))); | |
7107 | } | |
7108 | else | |
7109 | { | |
7110 | XSETCAR (tail, Qnil); | |
7111 | tail = XCDR (tail); | |
7112 | } | |
7113 | } | |
7114 | if (charset_map_loaded) | |
7115 | { | |
7116 | EMACS_INT p_offset = p - pbeg, pend_offset = pend - pbeg; | |
05e6f5dc | 7117 | |
df7492f9 | 7118 | if (STRINGP (start)) |
8f924df7 | 7119 | pbeg = SDATA (start); |
df7492f9 KH |
7120 | else |
7121 | pbeg = BYTE_POS_ADDR (start_byte); | |
7122 | p = pbeg + p_offset; | |
7123 | pend = pbeg + pend_offset; | |
7124 | } | |
7125 | } | |
ec6d2bb8 | 7126 | } |
fb88bf2d | 7127 | |
df7492f9 KH |
7128 | safe_codings = Qnil; |
7129 | for (tail = coding_attrs_list; CONSP (tail); tail = XCDR (tail)) | |
7130 | if (! NILP (XCAR (tail))) | |
7131 | safe_codings = Fcons (CODING_ATTR_BASE_NAME (XCAR (tail)), safe_codings); | |
ec6d2bb8 | 7132 | |
05e6f5dc KH |
7133 | return safe_codings; |
7134 | } | |
4956c225 | 7135 | |
d46c5b12 | 7136 | |
8f924df7 KH |
7137 | DEFUN ("unencodable-char-position", Funencodable_char_position, |
7138 | Sunencodable_char_position, 3, 5, 0, | |
7139 | doc: /* | |
7140 | Return position of first un-encodable character in a region. | |
7141 | START and END specfiy the region and CODING-SYSTEM specifies the | |
7142 | encoding to check. Return nil if CODING-SYSTEM does encode the region. | |
d46c5b12 | 7143 | |
8f924df7 KH |
7144 | If optional 4th argument COUNT is non-nil, it specifies at most how |
7145 | many un-encodable characters to search. In this case, the value is a | |
7146 | list of positions. | |
d46c5b12 | 7147 | |
8f924df7 KH |
7148 | If optional 5th argument STRING is non-nil, it is a string to search |
7149 | for un-encodable characters. In that case, START and END are indexes | |
7150 | to the string. */) | |
7151 | (start, end, coding_system, count, string) | |
7152 | Lisp_Object start, end, coding_system, count, string; | |
7153 | { | |
7154 | int n; | |
7155 | struct coding_system coding; | |
7156 | Lisp_Object attrs, charset_list; | |
7157 | Lisp_Object positions; | |
7158 | int from, to; | |
7159 | const unsigned char *p, *stop, *pend; | |
7160 | int ascii_compatible; | |
fb88bf2d | 7161 | |
8f924df7 KH |
7162 | setup_coding_system (Fcheck_coding_system (coding_system), &coding); |
7163 | attrs = CODING_ID_ATTRS (coding.id); | |
7164 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) | |
7165 | return Qnil; | |
7166 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); | |
7167 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
fb88bf2d | 7168 | |
8f924df7 KH |
7169 | if (NILP (string)) |
7170 | { | |
7171 | validate_region (&start, &end); | |
7172 | from = XINT (start); | |
7173 | to = XINT (end); | |
7174 | if (NILP (current_buffer->enable_multibyte_characters) | |
7175 | || (ascii_compatible | |
7176 | && (to - from) == (CHAR_TO_BYTE (to) - (CHAR_TO_BYTE (from))))) | |
7177 | return Qnil; | |
7178 | p = CHAR_POS_ADDR (from); | |
7179 | pend = CHAR_POS_ADDR (to); | |
7180 | if (from < GPT && to >= GPT) | |
7181 | stop = GPT_ADDR; | |
7182 | else | |
7183 | stop = pend; | |
7184 | } | |
7185 | else | |
7186 | { | |
7187 | CHECK_STRING (string); | |
7188 | CHECK_NATNUM (start); | |
7189 | CHECK_NATNUM (end); | |
7190 | from = XINT (start); | |
7191 | to = XINT (end); | |
7192 | if (from > to | |
7193 | || to > SCHARS (string)) | |
7194 | args_out_of_range_3 (string, start, end); | |
7195 | if (! STRING_MULTIBYTE (string)) | |
7196 | return Qnil; | |
7197 | p = SDATA (string) + string_char_to_byte (string, from); | |
7198 | stop = pend = SDATA (string) + string_char_to_byte (string, to); | |
7199 | if (ascii_compatible && (to - from) == (pend - p)) | |
7200 | return Qnil; | |
7201 | } | |
f2558efd | 7202 | |
8f924df7 KH |
7203 | if (NILP (count)) |
7204 | n = 1; | |
7205 | else | |
b73bfc1c | 7206 | { |
8f924df7 KH |
7207 | CHECK_NATNUM (count); |
7208 | n = XINT (count); | |
b73bfc1c KH |
7209 | } |
7210 | ||
8f924df7 KH |
7211 | positions = Qnil; |
7212 | while (1) | |
d46c5b12 | 7213 | { |
8f924df7 | 7214 | int c; |
ec6d2bb8 | 7215 | |
8f924df7 KH |
7216 | if (ascii_compatible) |
7217 | while (p < stop && ASCII_BYTE_P (*p)) | |
7218 | p++, from++; | |
7219 | if (p >= stop) | |
0e79d667 | 7220 | { |
8f924df7 KH |
7221 | if (p >= pend) |
7222 | break; | |
7223 | stop = pend; | |
7224 | p = GAP_END_ADDR; | |
0e79d667 | 7225 | } |
ec6d2bb8 | 7226 | |
8f924df7 KH |
7227 | c = STRING_CHAR_ADVANCE (p); |
7228 | if (! (ASCII_CHAR_P (c) && ascii_compatible) | |
7229 | && ! char_charset (c, charset_list, NULL)) | |
ec6d2bb8 | 7230 | { |
8f924df7 KH |
7231 | positions = Fcons (make_number (from), positions); |
7232 | n--; | |
7233 | if (n == 0) | |
7234 | break; | |
ec6d2bb8 KH |
7235 | } |
7236 | ||
8f924df7 KH |
7237 | from++; |
7238 | } | |
d46c5b12 | 7239 | |
8f924df7 KH |
7240 | return (NILP (count) ? Fcar (positions) : Fnreverse (positions)); |
7241 | } | |
d46c5b12 | 7242 | |
d46c5b12 | 7243 | |
df7492f9 KH |
7244 | DEFUN ("check-coding-systems-region", Fcheck_coding_systems_region, |
7245 | Scheck_coding_systems_region, 3, 3, 0, | |
7246 | doc: /* Check if the region is encodable by coding systems. | |
d46c5b12 | 7247 | |
df7492f9 KH |
7248 | START and END are buffer positions specifying the region. |
7249 | CODING-SYSTEM-LIST is a list of coding systems to check. | |
d46c5b12 | 7250 | |
df7492f9 KH |
7251 | The value is an alist ((CODING-SYSTEM POS0 POS1 ...) ...), where |
7252 | CODING-SYSTEM is a member of CODING-SYSTEM-LIst and can't encode the | |
7253 | whole region, POS0, POS1, ... are buffer positions where non-encodable | |
7254 | characters are found. | |
93dec019 | 7255 | |
df7492f9 KH |
7256 | If all coding systems in CODING-SYSTEM-LIST can encode the region, the |
7257 | value is nil. | |
93dec019 | 7258 | |
df7492f9 KH |
7259 | START may be a string. In that case, check if the string is |
7260 | encodable, and the value contains indices to the string instead of | |
7261 | buffer positions. END is ignored. */) | |
7262 | (start, end, coding_system_list) | |
7263 | Lisp_Object start, end, coding_system_list; | |
05e6f5dc | 7264 | { |
df7492f9 KH |
7265 | Lisp_Object list; |
7266 | EMACS_INT start_byte, end_byte; | |
7267 | int pos; | |
7c78e542 | 7268 | const unsigned char *p, *pbeg, *pend; |
df7492f9 KH |
7269 | int c; |
7270 | Lisp_Object tail, elt; | |
70ad9fc4 | 7271 | |
05e6f5dc KH |
7272 | if (STRINGP (start)) |
7273 | { | |
df7492f9 | 7274 | if (!STRING_MULTIBYTE (start) |
8f924df7 | 7275 | && SCHARS (start) != SBYTES (start)) |
df7492f9 KH |
7276 | return Qnil; |
7277 | start_byte = 0; | |
8f924df7 | 7278 | end_byte = SBYTES (start); |
df7492f9 | 7279 | pos = 0; |
d46c5b12 | 7280 | } |
05e6f5dc | 7281 | else |
b73bfc1c | 7282 | { |
b7826503 PJ |
7283 | CHECK_NUMBER_COERCE_MARKER (start); |
7284 | CHECK_NUMBER_COERCE_MARKER (end); | |
05e6f5dc KH |
7285 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) |
7286 | args_out_of_range (start, end); | |
7287 | if (NILP (current_buffer->enable_multibyte_characters)) | |
df7492f9 KH |
7288 | return Qnil; |
7289 | start_byte = CHAR_TO_BYTE (XINT (start)); | |
7290 | end_byte = CHAR_TO_BYTE (XINT (end)); | |
7291 | if (XINT (end) - XINT (start) == end_byte - start_byte) | |
05e6f5dc | 7292 | return Qt; |
df7492f9 | 7293 | |
e1c23804 | 7294 | if (XINT (start) < GPT && XINT (end) > GPT) |
b73bfc1c | 7295 | { |
e1c23804 DL |
7296 | if ((GPT - XINT (start)) < (XINT (end) - GPT)) |
7297 | move_gap_both (XINT (start), start_byte); | |
df7492f9 | 7298 | else |
e1c23804 | 7299 | move_gap_both (XINT (end), end_byte); |
b73bfc1c | 7300 | } |
e1c23804 | 7301 | pos = XINT (start); |
b73bfc1c | 7302 | } |
7553d0e1 | 7303 | |
df7492f9 KH |
7304 | list = Qnil; |
7305 | for (tail = coding_system_list; CONSP (tail); tail = XCDR (tail)) | |
12410ef1 | 7306 | { |
df7492f9 KH |
7307 | elt = XCAR (tail); |
7308 | list = Fcons (Fcons (elt, Fcons (AREF (CODING_SYSTEM_SPEC (elt), 0), | |
7309 | Qnil)), | |
7310 | list); | |
12410ef1 KH |
7311 | } |
7312 | ||
df7492f9 | 7313 | if (STRINGP (start)) |
8f924df7 | 7314 | p = pbeg = SDATA (start); |
72d1a715 | 7315 | else |
df7492f9 KH |
7316 | p = pbeg = BYTE_POS_ADDR (start_byte); |
7317 | pend = p + (end_byte - start_byte); | |
4ed46869 | 7318 | |
df7492f9 KH |
7319 | while (p < pend && ASCII_BYTE_P (*p)) p++, pos++; |
7320 | while (p < pend && ASCII_BYTE_P (*(pend - 1))) pend--; | |
ec6d2bb8 | 7321 | |
df7492f9 | 7322 | while (p < pend) |
d46c5b12 | 7323 | { |
df7492f9 KH |
7324 | if (ASCII_BYTE_P (*p)) |
7325 | p++; | |
e133c8fa | 7326 | else |
05e6f5dc | 7327 | { |
df7492f9 KH |
7328 | c = STRING_CHAR_ADVANCE (p); |
7329 | ||
7330 | charset_map_loaded = 0; | |
7331 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
7332 | { | |
7333 | elt = XCDR (XCAR (tail)); | |
7334 | if (! char_encodable_p (c, XCAR (elt))) | |
7335 | XSETCDR (elt, Fcons (make_number (pos), XCDR (elt))); | |
7336 | } | |
7337 | if (charset_map_loaded) | |
7338 | { | |
7339 | EMACS_INT p_offset = p - pbeg, pend_offset = pend - pbeg; | |
7340 | ||
7341 | if (STRINGP (start)) | |
8f924df7 | 7342 | pbeg = SDATA (start); |
df7492f9 KH |
7343 | else |
7344 | pbeg = BYTE_POS_ADDR (start_byte); | |
7345 | p = pbeg + p_offset; | |
7346 | pend = pbeg + pend_offset; | |
7347 | } | |
05e6f5dc | 7348 | } |
df7492f9 | 7349 | pos++; |
d46c5b12 | 7350 | } |
4ed46869 | 7351 | |
df7492f9 KH |
7352 | tail = list; |
7353 | list = Qnil; | |
7354 | for (; CONSP (tail); tail = XCDR (tail)) | |
ec6d2bb8 | 7355 | { |
df7492f9 KH |
7356 | elt = XCAR (tail); |
7357 | if (CONSP (XCDR (XCDR (elt)))) | |
7358 | list = Fcons (Fcons (XCAR (elt), Fnreverse (XCDR (XCDR (elt)))), | |
7359 | list); | |
ec6d2bb8 | 7360 | } |
2b4f9037 | 7361 | |
df7492f9 | 7362 | return list; |
d46c5b12 KH |
7363 | } |
7364 | ||
3fd9494b | 7365 | |
b73bfc1c KH |
7366 | |
7367 | Lisp_Object | |
df7492f9 KH |
7368 | code_convert_region (start, end, coding_system, dst_object, encodep, norecord) |
7369 | Lisp_Object start, end, coding_system, dst_object; | |
7370 | int encodep, norecord; | |
4ed46869 | 7371 | { |
3a73fa5d | 7372 | struct coding_system coding; |
df7492f9 KH |
7373 | EMACS_INT from, from_byte, to, to_byte; |
7374 | Lisp_Object src_object; | |
4ed46869 | 7375 | |
b7826503 PJ |
7376 | CHECK_NUMBER_COERCE_MARKER (start); |
7377 | CHECK_NUMBER_COERCE_MARKER (end); | |
df7492f9 KH |
7378 | if (NILP (coding_system)) |
7379 | coding_system = Qno_conversion; | |
7380 | else | |
7381 | CHECK_CODING_SYSTEM (coding_system); | |
7382 | src_object = Fcurrent_buffer (); | |
7383 | if (NILP (dst_object)) | |
7384 | dst_object = src_object; | |
7385 | else if (! EQ (dst_object, Qt)) | |
7386 | CHECK_BUFFER (dst_object); | |
3a73fa5d | 7387 | |
d46c5b12 KH |
7388 | validate_region (&start, &end); |
7389 | from = XFASTINT (start); | |
df7492f9 | 7390 | from_byte = CHAR_TO_BYTE (from); |
d46c5b12 | 7391 | to = XFASTINT (end); |
df7492f9 | 7392 | to_byte = CHAR_TO_BYTE (to); |
764ca8da | 7393 | |
df7492f9 KH |
7394 | setup_coding_system (coding_system, &coding); |
7395 | coding.mode |= CODING_MODE_LAST_BLOCK; | |
ec6d2bb8 | 7396 | |
df7492f9 KH |
7397 | if (encodep) |
7398 | encode_coding_object (&coding, src_object, from, from_byte, to, to_byte, | |
7399 | dst_object); | |
7400 | else | |
7401 | decode_coding_object (&coding, src_object, from, from_byte, to, to_byte, | |
7402 | dst_object); | |
7403 | if (! norecord) | |
7404 | Vlast_coding_system_used = CODING_ID_NAME (coding.id); | |
ec6d2bb8 | 7405 | |
df7492f9 KH |
7406 | if (coding.result != CODING_RESULT_SUCCESS) |
7407 | error ("Code conversion error: %d", coding.result); | |
b73bfc1c | 7408 | |
df7492f9 KH |
7409 | return (BUFFERP (dst_object) |
7410 | ? make_number (coding.produced_char) | |
7411 | : coding.dst_object); | |
4031e2bf | 7412 | } |
78108bcd | 7413 | |
4ed46869 | 7414 | |
4031e2bf | 7415 | DEFUN ("decode-coding-region", Fdecode_coding_region, Sdecode_coding_region, |
df7492f9 | 7416 | 3, 4, "r\nzCoding system: ", |
48b0f3ae | 7417 | doc: /* Decode the current region from the specified coding system. |
df7492f9 KH |
7418 | When called from a program, takes four arguments: |
7419 | START, END, CODING-SYSTEM, and DESTINATION. | |
7420 | START and END are buffer positions. | |
8844fa83 | 7421 | |
df7492f9 KH |
7422 | Optional 4th arguments DESTINATION specifies where the decoded text goes. |
7423 | If nil, the region between START and END is replace by the decoded text. | |
7424 | If buffer, the decoded text is inserted in the buffer. | |
7425 | If t, the decoded text is returned. | |
8844fa83 | 7426 | |
48b0f3ae PJ |
7427 | This function sets `last-coding-system-used' to the precise coding system |
7428 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
7429 | not fully specified.) | |
7430 | It returns the length of the decoded text. */) | |
df7492f9 KH |
7431 | (start, end, coding_system, destination) |
7432 | Lisp_Object start, end, coding_system, destination; | |
4031e2bf | 7433 | { |
df7492f9 | 7434 | return code_convert_region (start, end, coding_system, destination, 0, 0); |
3a73fa5d | 7435 | } |
8844fa83 | 7436 | |
3a73fa5d | 7437 | DEFUN ("encode-coding-region", Fencode_coding_region, Sencode_coding_region, |
df7492f9 KH |
7438 | 3, 4, "r\nzCoding system: ", |
7439 | doc: /* Encode the current region by specified coding system. | |
48b0f3ae PJ |
7440 | When called from a program, takes three arguments: |
7441 | START, END, and CODING-SYSTEM. START and END are buffer positions. | |
d46c5b12 | 7442 | |
df7492f9 KH |
7443 | Optional 4th arguments DESTINATION specifies where the encoded text goes. |
7444 | If nil, the region between START and END is replace by the encoded text. | |
7445 | If buffer, the encoded text is inserted in the buffer. | |
7446 | If t, the encoded text is returned. | |
2391eaa4 | 7447 | |
48b0f3ae PJ |
7448 | This function sets `last-coding-system-used' to the precise coding system |
7449 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
7450 | not fully specified.) | |
7451 | It returns the length of the encoded text. */) | |
df7492f9 KH |
7452 | (start, end, coding_system, destination) |
7453 | Lisp_Object start, end, coding_system, destination; | |
3a73fa5d | 7454 | { |
df7492f9 | 7455 | return code_convert_region (start, end, coding_system, destination, 1, 0); |
b73bfc1c KH |
7456 | } |
7457 | ||
7458 | Lisp_Object | |
df7492f9 KH |
7459 | code_convert_string (string, coding_system, dst_object, |
7460 | encodep, nocopy, norecord) | |
7461 | Lisp_Object string, coding_system, dst_object; | |
7462 | int encodep, nocopy, norecord; | |
b73bfc1c | 7463 | { |
4031e2bf | 7464 | struct coding_system coding; |
df7492f9 | 7465 | EMACS_INT chars, bytes; |
ec6d2bb8 | 7466 | |
b7826503 | 7467 | CHECK_STRING (string); |
d46c5b12 | 7468 | if (NILP (coding_system)) |
4956c225 | 7469 | { |
df7492f9 KH |
7470 | if (! norecord) |
7471 | Vlast_coding_system_used = Qno_conversion; | |
7472 | if (NILP (dst_object)) | |
7473 | return (nocopy ? Fcopy_sequence (string) : string); | |
4956c225 | 7474 | } |
b73bfc1c | 7475 | |
df7492f9 KH |
7476 | if (NILP (coding_system)) |
7477 | coding_system = Qno_conversion; | |
7478 | else | |
7479 | CHECK_CODING_SYSTEM (coding_system); | |
7480 | if (NILP (dst_object)) | |
7481 | dst_object = Qt; | |
7482 | else if (! EQ (dst_object, Qt)) | |
7483 | CHECK_BUFFER (dst_object); | |
73be902c | 7484 | |
df7492f9 | 7485 | setup_coding_system (coding_system, &coding); |
d46c5b12 | 7486 | coding.mode |= CODING_MODE_LAST_BLOCK; |
8f924df7 KH |
7487 | chars = SCHARS (string); |
7488 | bytes = SBYTES (string); | |
df7492f9 KH |
7489 | if (encodep) |
7490 | encode_coding_object (&coding, string, 0, 0, chars, bytes, dst_object); | |
7491 | else | |
7492 | decode_coding_object (&coding, string, 0, 0, chars, bytes, dst_object); | |
7493 | if (! norecord) | |
7494 | Vlast_coding_system_used = CODING_ID_NAME (coding.id); | |
73be902c | 7495 | |
df7492f9 KH |
7496 | if (coding.result != CODING_RESULT_SUCCESS) |
7497 | error ("Code conversion error: %d", coding.result); | |
2391eaa4 | 7498 | |
df7492f9 KH |
7499 | return (BUFFERP (dst_object) |
7500 | ? make_number (coding.produced_char) | |
7501 | : coding.dst_object); | |
4ed46869 | 7502 | } |
73be902c | 7503 | |
b73bfc1c | 7504 | |
ecec61c1 | 7505 | /* Encode or decode STRING according to CODING_SYSTEM. |
ec6d2bb8 | 7506 | Do not set Vlast_coding_system_used. |
4ed46869 | 7507 | |
ec6d2bb8 KH |
7508 | This function is called only from macros DECODE_FILE and |
7509 | ENCODE_FILE, thus we ignore character composition. */ | |
4ed46869 | 7510 | |
ecec61c1 KH |
7511 | Lisp_Object |
7512 | code_convert_string_norecord (string, coding_system, encodep) | |
7513 | Lisp_Object string, coding_system; | |
7514 | int encodep; | |
4ed46869 | 7515 | { |
0be8721c | 7516 | return code_convert_string (string, coding_system, Qt, encodep, 0, 1); |
4ed46869 KH |
7517 | } |
7518 | ||
4ed46869 | 7519 | |
df7492f9 KH |
7520 | DEFUN ("decode-coding-string", Fdecode_coding_string, Sdecode_coding_string, |
7521 | 2, 4, 0, | |
7522 | doc: /* Decode STRING which is encoded in CODING-SYSTEM, and return the result. | |
7523 | ||
7524 | Optional third arg NOCOPY non-nil means it is OK to return STRING itself | |
7525 | if the decoding operation is trivial. | |
ecec61c1 | 7526 | |
df7492f9 | 7527 | Optional fourth arg BUFFER non-nil meant that the decoded text is |
a3f6ee6d | 7528 | inserted in BUFFER instead of returned as a string. In this case, |
df7492f9 | 7529 | the return value is BUFFER. |
ecec61c1 | 7530 | |
df7492f9 KH |
7531 | This function sets `last-coding-system-used' to the precise coding system |
7532 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
7533 | not fully specified. */) | |
7534 | (string, coding_system, nocopy, buffer) | |
7535 | Lisp_Object string, coding_system, nocopy, buffer; | |
4ed46869 | 7536 | { |
df7492f9 KH |
7537 | return code_convert_string (string, coding_system, buffer, |
7538 | 0, ! NILP (nocopy), 0); | |
4ed46869 KH |
7539 | } |
7540 | ||
df7492f9 KH |
7541 | DEFUN ("encode-coding-string", Fencode_coding_string, Sencode_coding_string, |
7542 | 2, 4, 0, | |
7543 | doc: /* Encode STRING to CODING-SYSTEM, and return the result. | |
7544 | ||
7545 | Optional third arg NOCOPY non-nil means it is OK to return STRING | |
7546 | itself if the encoding operation is trivial. | |
7547 | ||
7548 | Optional fourth arg BUFFER non-nil meant that the encoded text is | |
a3f6ee6d | 7549 | inserted in BUFFER instead of returned as a string. In this case, |
df7492f9 KH |
7550 | the return value is BUFFER. |
7551 | ||
7552 | This function sets `last-coding-system-used' to the precise coding system | |
7553 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
7554 | not fully specified.) */) | |
7555 | (string, coding_system, nocopy, buffer) | |
7556 | Lisp_Object string, coding_system, nocopy, buffer; | |
4ed46869 | 7557 | { |
df7492f9 | 7558 | return code_convert_string (string, coding_system, buffer, |
c197f191 | 7559 | 1, ! NILP (nocopy), 1); |
4ed46869 | 7560 | } |
df7492f9 | 7561 | |
3a73fa5d | 7562 | \f |
4ed46869 | 7563 | DEFUN ("decode-sjis-char", Fdecode_sjis_char, Sdecode_sjis_char, 1, 1, 0, |
48b0f3ae PJ |
7564 | doc: /* Decode a Japanese character which has CODE in shift_jis encoding. |
7565 | Return the corresponding character. */) | |
7566 | (code) | |
4ed46869 | 7567 | Lisp_Object code; |
4ed46869 | 7568 | { |
df7492f9 KH |
7569 | Lisp_Object spec, attrs, val; |
7570 | struct charset *charset_roman, *charset_kanji, *charset_kana, *charset; | |
7571 | int c; | |
4ed46869 | 7572 | |
df7492f9 KH |
7573 | CHECK_NATNUM (code); |
7574 | c = XFASTINT (code); | |
7575 | CHECK_CODING_SYSTEM_GET_SPEC (Vsjis_coding_system, spec); | |
7576 | attrs = AREF (spec, 0); | |
4ed46869 | 7577 | |
df7492f9 KH |
7578 | if (ASCII_BYTE_P (c) |
7579 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
7580 | return code; | |
4ed46869 | 7581 | |
df7492f9 KH |
7582 | val = CODING_ATTR_CHARSET_LIST (attrs); |
7583 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
004068e4 KH |
7584 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); |
7585 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))); | |
fa42c37f | 7586 | |
df7492f9 KH |
7587 | if (c <= 0x7F) |
7588 | charset = charset_roman; | |
7589 | else if (c >= 0xA0 && c < 0xDF) | |
55ab7be3 | 7590 | { |
df7492f9 KH |
7591 | charset = charset_kana; |
7592 | c -= 0x80; | |
4ed46869 | 7593 | } |
55ab7be3 | 7594 | else |
4ed46869 | 7595 | { |
004068e4 | 7596 | int s1 = c >> 8, s2 = c & 0xFF; |
df7492f9 KH |
7597 | |
7598 | if (s1 < 0x81 || (s1 > 0x9F && s1 < 0xE0) || s1 > 0xEF | |
7599 | || s2 < 0x40 || s2 == 0x7F || s2 > 0xFC) | |
7600 | error ("Invalid code: %d", code); | |
7601 | SJIS_TO_JIS (c); | |
7602 | charset = charset_kanji; | |
4ed46869 | 7603 | } |
df7492f9 KH |
7604 | c = DECODE_CHAR (charset, c); |
7605 | if (c < 0) | |
7606 | error ("Invalid code: %d", code); | |
7607 | return make_number (c); | |
93dec019 | 7608 | } |
4ed46869 | 7609 | |
48b0f3ae | 7610 | |
4ed46869 | 7611 | DEFUN ("encode-sjis-char", Fencode_sjis_char, Sencode_sjis_char, 1, 1, 0, |
48b0f3ae PJ |
7612 | doc: /* Encode a Japanese character CHAR to shift_jis encoding. |
7613 | Return the corresponding code in SJIS. */) | |
7614 | (ch) | |
df7492f9 | 7615 | Lisp_Object ch; |
4ed46869 | 7616 | { |
df7492f9 KH |
7617 | Lisp_Object spec, attrs, charset_list; |
7618 | int c; | |
7619 | struct charset *charset; | |
7620 | unsigned code; | |
48b0f3ae | 7621 | |
df7492f9 KH |
7622 | CHECK_CHARACTER (ch); |
7623 | c = XFASTINT (ch); | |
7624 | CHECK_CODING_SYSTEM_GET_SPEC (Vsjis_coding_system, spec); | |
7625 | attrs = AREF (spec, 0); | |
7626 | ||
7627 | if (ASCII_CHAR_P (c) | |
7628 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
7629 | return ch; | |
7630 | ||
7631 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
7632 | charset = char_charset (c, charset_list, &code); | |
7633 | if (code == CHARSET_INVALID_CODE (charset)) | |
7634 | error ("Can't encode by shift_jis encoding: %d", c); | |
7635 | JIS_TO_SJIS (code); | |
7636 | ||
7637 | return make_number (code); | |
4ed46869 KH |
7638 | } |
7639 | ||
7640 | DEFUN ("decode-big5-char", Fdecode_big5_char, Sdecode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
7641 | doc: /* Decode a Big5 character which has CODE in BIG5 coding system. |
7642 | Return the corresponding character. */) | |
7643 | (code) | |
4ed46869 | 7644 | Lisp_Object code; |
d46c5b12 | 7645 | { |
df7492f9 KH |
7646 | Lisp_Object spec, attrs, val; |
7647 | struct charset *charset_roman, *charset_big5, *charset; | |
7648 | int c; | |
6289dd10 | 7649 | |
df7492f9 KH |
7650 | CHECK_NATNUM (code); |
7651 | c = XFASTINT (code); | |
7652 | CHECK_CODING_SYSTEM_GET_SPEC (Vbig5_coding_system, spec); | |
7653 | attrs = AREF (spec, 0); | |
4ed46869 | 7654 | |
df7492f9 KH |
7655 | if (ASCII_BYTE_P (c) |
7656 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
7657 | return code; | |
6289dd10 | 7658 | |
df7492f9 KH |
7659 | val = CODING_ATTR_CHARSET_LIST (attrs); |
7660 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
7661 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
c210f766 | 7662 | |
df7492f9 KH |
7663 | if (c <= 0x7F) |
7664 | charset = charset_roman; | |
c28a9453 KH |
7665 | else |
7666 | { | |
df7492f9 KH |
7667 | int b1 = c >> 8, b2 = c & 0x7F; |
7668 | if (b1 < 0xA1 || b1 > 0xFE | |
7669 | || b2 < 0x40 || (b2 > 0x7E && b2 < 0xA1) || b2 > 0xFE) | |
7670 | error ("Invalid code: %d", code); | |
7671 | charset = charset_big5; | |
c28a9453 | 7672 | } |
df7492f9 KH |
7673 | c = DECODE_CHAR (charset, (unsigned )c); |
7674 | if (c < 0) | |
7675 | error ("Invalid code: %d", code); | |
7676 | return make_number (c); | |
d46c5b12 | 7677 | } |
6289dd10 | 7678 | |
4ed46869 | 7679 | DEFUN ("encode-big5-char", Fencode_big5_char, Sencode_big5_char, 1, 1, 0, |
48b0f3ae PJ |
7680 | doc: /* Encode the Big5 character CHAR to BIG5 coding system. |
7681 | Return the corresponding character code in Big5. */) | |
7682 | (ch) | |
4ed46869 KH |
7683 | Lisp_Object ch; |
7684 | { | |
df7492f9 KH |
7685 | Lisp_Object spec, attrs, charset_list; |
7686 | struct charset *charset; | |
7687 | int c; | |
7688 | unsigned code; | |
7689 | ||
7690 | CHECK_CHARACTER (ch); | |
7691 | c = XFASTINT (ch); | |
7692 | CHECK_CODING_SYSTEM_GET_SPEC (Vbig5_coding_system, spec); | |
7693 | attrs = AREF (spec, 0); | |
7694 | if (ASCII_CHAR_P (c) | |
7695 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
7696 | return ch; | |
7697 | ||
7698 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
7699 | charset = char_charset (c, charset_list, &code); | |
7700 | if (code == CHARSET_INVALID_CODE (charset)) | |
7701 | error ("Can't encode by Big5 encoding: %d", c); | |
7702 | ||
7703 | return make_number (code); | |
4ed46869 | 7704 | } |
48b0f3ae | 7705 | |
3a73fa5d | 7706 | \f |
1ba9e4ab KH |
7707 | DEFUN ("set-terminal-coding-system-internal", |
7708 | Fset_terminal_coding_system_internal, | |
48b0f3ae PJ |
7709 | Sset_terminal_coding_system_internal, 1, 1, 0, |
7710 | doc: /* Internal use only. */) | |
7711 | (coding_system) | |
b74e4686 | 7712 | Lisp_Object coding_system; |
4ed46869 | 7713 | { |
b7826503 | 7714 | CHECK_SYMBOL (coding_system); |
df7492f9 KH |
7715 | setup_coding_system (Fcheck_coding_system (coding_system), |
7716 | &terminal_coding); | |
48b0f3ae | 7717 | |
70c22245 | 7718 | /* We had better not send unsafe characters to terminal. */ |
df7492f9 KH |
7719 | terminal_coding.mode |= CODING_MODE_SAFE_ENCODING; |
7720 | /* Characer composition should be disabled. */ | |
7721 | terminal_coding.common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
b73bfc1c KH |
7722 | terminal_coding.src_multibyte = 1; |
7723 | terminal_coding.dst_multibyte = 0; | |
4ed46869 KH |
7724 | return Qnil; |
7725 | } | |
7726 | ||
c4825358 KH |
7727 | DEFUN ("set-safe-terminal-coding-system-internal", |
7728 | Fset_safe_terminal_coding_system_internal, | |
48b0f3ae | 7729 | Sset_safe_terminal_coding_system_internal, 1, 1, 0, |
ddb67bdc | 7730 | doc: /* Internal use only. */) |
48b0f3ae | 7731 | (coding_system) |
b74e4686 | 7732 | Lisp_Object coding_system; |
d46c5b12 | 7733 | { |
b7826503 | 7734 | CHECK_SYMBOL (coding_system); |
c4825358 KH |
7735 | setup_coding_system (Fcheck_coding_system (coding_system), |
7736 | &safe_terminal_coding); | |
df7492f9 KH |
7737 | /* Characer composition should be disabled. */ |
7738 | safe_terminal_coding.common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
b73bfc1c KH |
7739 | safe_terminal_coding.src_multibyte = 1; |
7740 | safe_terminal_coding.dst_multibyte = 0; | |
c4825358 KH |
7741 | return Qnil; |
7742 | } | |
4ed46869 | 7743 | |
4ed46869 KH |
7744 | DEFUN ("terminal-coding-system", |
7745 | Fterminal_coding_system, Sterminal_coding_system, 0, 0, 0, | |
48b0f3ae PJ |
7746 | doc: /* Return coding system specified for terminal output. */) |
7747 | () | |
4ed46869 | 7748 | { |
df7492f9 | 7749 | return CODING_ID_NAME (terminal_coding.id); |
4ed46869 KH |
7750 | } |
7751 | ||
1ba9e4ab KH |
7752 | DEFUN ("set-keyboard-coding-system-internal", |
7753 | Fset_keyboard_coding_system_internal, | |
48b0f3ae PJ |
7754 | Sset_keyboard_coding_system_internal, 1, 1, 0, |
7755 | doc: /* Internal use only. */) | |
7756 | (coding_system) | |
4ed46869 KH |
7757 | Lisp_Object coding_system; |
7758 | { | |
b7826503 | 7759 | CHECK_SYMBOL (coding_system); |
df7492f9 KH |
7760 | setup_coding_system (Fcheck_coding_system (coding_system), |
7761 | &keyboard_coding); | |
7762 | /* Characer composition should be disabled. */ | |
7763 | keyboard_coding.common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
4ed46869 KH |
7764 | return Qnil; |
7765 | } | |
7766 | ||
7767 | DEFUN ("keyboard-coding-system", | |
7768 | Fkeyboard_coding_system, Skeyboard_coding_system, 0, 0, 0, | |
48b0f3ae PJ |
7769 | doc: /* Return coding system specified for decoding keyboard input. */) |
7770 | () | |
4ed46869 | 7771 | { |
df7492f9 | 7772 | return CODING_ID_NAME (keyboard_coding.id); |
4ed46869 KH |
7773 | } |
7774 | ||
4ed46869 | 7775 | \f |
a5d301df KH |
7776 | DEFUN ("find-operation-coding-system", Ffind_operation_coding_system, |
7777 | Sfind_operation_coding_system, 1, MANY, 0, | |
48b0f3ae PJ |
7778 | doc: /* Choose a coding system for an operation based on the target name. |
7779 | The value names a pair of coding systems: (DECODING-SYSTEM . ENCODING-SYSTEM). | |
7780 | DECODING-SYSTEM is the coding system to use for decoding | |
7781 | \(in case OPERATION does decoding), and ENCODING-SYSTEM is the coding system | |
7782 | for encoding (in case OPERATION does encoding). | |
05e6f5dc | 7783 | |
48b0f3ae PJ |
7784 | The first argument OPERATION specifies an I/O primitive: |
7785 | For file I/O, `insert-file-contents' or `write-region'. | |
7786 | For process I/O, `call-process', `call-process-region', or `start-process'. | |
7787 | For network I/O, `open-network-stream'. | |
05e6f5dc | 7788 | |
48b0f3ae PJ |
7789 | The remaining arguments should be the same arguments that were passed |
7790 | to the primitive. Depending on which primitive, one of those arguments | |
7791 | is selected as the TARGET. For example, if OPERATION does file I/O, | |
7792 | whichever argument specifies the file name is TARGET. | |
05e6f5dc | 7793 | |
48b0f3ae PJ |
7794 | TARGET has a meaning which depends on OPERATION: |
7795 | For file I/O, TARGET is a file name. | |
7796 | For process I/O, TARGET is a process name. | |
7797 | For network I/O, TARGET is a service name or a port number | |
05e6f5dc | 7798 | |
48b0f3ae PJ |
7799 | This function looks up what specified for TARGET in, |
7800 | `file-coding-system-alist', `process-coding-system-alist', | |
7801 | or `network-coding-system-alist' depending on OPERATION. | |
7802 | They may specify a coding system, a cons of coding systems, | |
7803 | or a function symbol to call. | |
7804 | In the last case, we call the function with one argument, | |
7805 | which is a list of all the arguments given to this function. | |
7806 | ||
7807 | usage: (find-operation-coding-system OPERATION ARGUMENTS ...) */) | |
7808 | (nargs, args) | |
4ed46869 KH |
7809 | int nargs; |
7810 | Lisp_Object *args; | |
6b89e3aa | 7811 | { |
4ed46869 KH |
7812 | Lisp_Object operation, target_idx, target, val; |
7813 | register Lisp_Object chain; | |
177c0ea7 | 7814 | |
4ed46869 KH |
7815 | if (nargs < 2) |
7816 | error ("Too few arguments"); | |
7817 | operation = args[0]; | |
7818 | if (!SYMBOLP (operation) | |
7819 | || !INTEGERP (target_idx = Fget (operation, Qtarget_idx))) | |
df7492f9 | 7820 | error ("Invalid first arguement"); |
4ed46869 KH |
7821 | if (nargs < 1 + XINT (target_idx)) |
7822 | error ("Too few arguments for operation: %s", | |
8f924df7 | 7823 | SDATA (SYMBOL_NAME (operation))); |
4ed46869 KH |
7824 | target = args[XINT (target_idx) + 1]; |
7825 | if (!(STRINGP (target) | |
7826 | || (EQ (operation, Qopen_network_stream) && INTEGERP (target)))) | |
df7492f9 | 7827 | error ("Invalid %dth argument", XINT (target_idx) + 1); |
4ed46869 | 7828 | |
2e34157c RS |
7829 | chain = ((EQ (operation, Qinsert_file_contents) |
7830 | || EQ (operation, Qwrite_region)) | |
02ba4723 | 7831 | ? Vfile_coding_system_alist |
2e34157c | 7832 | : (EQ (operation, Qopen_network_stream) |
02ba4723 KH |
7833 | ? Vnetwork_coding_system_alist |
7834 | : Vprocess_coding_system_alist)); | |
4ed46869 KH |
7835 | if (NILP (chain)) |
7836 | return Qnil; | |
7837 | ||
03699b14 | 7838 | for (; CONSP (chain); chain = XCDR (chain)) |
6b89e3aa | 7839 | { |
f44d27ce | 7840 | Lisp_Object elt; |
6b89e3aa | 7841 | |
df7492f9 | 7842 | elt = XCAR (chain); |
4ed46869 KH |
7843 | if (CONSP (elt) |
7844 | && ((STRINGP (target) | |
03699b14 KR |
7845 | && STRINGP (XCAR (elt)) |
7846 | && fast_string_match (XCAR (elt), target) >= 0) | |
7847 | || (INTEGERP (target) && EQ (target, XCAR (elt))))) | |
6b89e3aa | 7848 | { |
03699b14 | 7849 | val = XCDR (elt); |
b19fd4c5 KH |
7850 | /* Here, if VAL is both a valid coding system and a valid |
7851 | function symbol, we return VAL as a coding system. */ | |
02ba4723 KH |
7852 | if (CONSP (val)) |
7853 | return val; | |
7854 | if (! SYMBOLP (val)) | |
7855 | return Qnil; | |
7856 | if (! NILP (Fcoding_system_p (val))) | |
7857 | return Fcons (val, val); | |
b19fd4c5 | 7858 | if (! NILP (Ffboundp (val))) |
6b89e3aa | 7859 | { |
b19fd4c5 KH |
7860 | val = call1 (val, Flist (nargs, args)); |
7861 | if (CONSP (val)) | |
7862 | return val; | |
7863 | if (SYMBOLP (val) && ! NILP (Fcoding_system_p (val))) | |
7864 | return Fcons (val, val); | |
6b89e3aa | 7865 | } |
02ba4723 | 7866 | return Qnil; |
6b89e3aa KH |
7867 | } |
7868 | } | |
4ed46869 | 7869 | return Qnil; |
6b89e3aa KH |
7870 | } |
7871 | ||
df7492f9 | 7872 | DEFUN ("set-coding-system-priority", Fset_coding_system_priority, |
a3f6ee6d | 7873 | Sset_coding_system_priority, 0, MANY, 0, |
da7db224 | 7874 | doc: /* Assign higher priority to the coding systems given as arguments. |
ff563fce | 7875 | If multiple coding systems belongs to the same category, |
a3181084 DL |
7876 | all but the first one are ignored. |
7877 | ||
7878 | usage: (set-coding-system-priority ...) */) | |
df7492f9 KH |
7879 | (nargs, args) |
7880 | int nargs; | |
7881 | Lisp_Object *args; | |
7882 | { | |
7883 | int i, j; | |
7884 | int changed[coding_category_max]; | |
7885 | enum coding_category priorities[coding_category_max]; | |
7886 | ||
7887 | bzero (changed, sizeof changed); | |
6b89e3aa | 7888 | |
df7492f9 | 7889 | for (i = j = 0; i < nargs; i++) |
6b89e3aa | 7890 | { |
df7492f9 KH |
7891 | enum coding_category category; |
7892 | Lisp_Object spec, attrs; | |
6b89e3aa | 7893 | |
df7492f9 KH |
7894 | CHECK_CODING_SYSTEM_GET_SPEC (args[i], spec); |
7895 | attrs = AREF (spec, 0); | |
7896 | category = XINT (CODING_ATTR_CATEGORY (attrs)); | |
7897 | if (changed[category]) | |
7898 | /* Ignore this coding system because a coding system of the | |
7899 | same category already had a higher priority. */ | |
7900 | continue; | |
7901 | changed[category] = 1; | |
7902 | priorities[j++] = category; | |
7903 | if (coding_categories[category].id >= 0 | |
7904 | && ! EQ (args[i], CODING_ID_NAME (coding_categories[category].id))) | |
7905 | setup_coding_system (args[i], &coding_categories[category]); | |
ff563fce | 7906 | Fset (AREF (Vcoding_category_table, category), args[i]); |
df7492f9 | 7907 | } |
6b89e3aa | 7908 | |
df7492f9 KH |
7909 | /* Now we have decided top J priorities. Reflect the order of the |
7910 | original priorities to the remaining priorities. */ | |
6b89e3aa | 7911 | |
df7492f9 | 7912 | for (i = j, j = 0; i < coding_category_max; i++, j++) |
6b89e3aa | 7913 | { |
df7492f9 KH |
7914 | while (j < coding_category_max |
7915 | && changed[coding_priorities[j]]) | |
7916 | j++; | |
7917 | if (j == coding_category_max) | |
7918 | abort (); | |
7919 | priorities[i] = coding_priorities[j]; | |
7920 | } | |
6b89e3aa | 7921 | |
df7492f9 | 7922 | bcopy (priorities, coding_priorities, sizeof priorities); |
177c0ea7 | 7923 | |
ff563fce KH |
7924 | /* Update `coding-category-list'. */ |
7925 | Vcoding_category_list = Qnil; | |
7926 | for (i = coding_category_max - 1; i >= 0; i--) | |
7927 | Vcoding_category_list | |
7928 | = Fcons (AREF (Vcoding_category_table, priorities[i]), | |
7929 | Vcoding_category_list); | |
6b89e3aa | 7930 | |
df7492f9 | 7931 | return Qnil; |
6b89e3aa KH |
7932 | } |
7933 | ||
df7492f9 KH |
7934 | DEFUN ("coding-system-priority-list", Fcoding_system_priority_list, |
7935 | Scoding_system_priority_list, 0, 1, 0, | |
da7db224 DL |
7936 | doc: /* Return a list of coding systems ordered by their priorities. |
7937 | HIGHESTP non-nil means just return the highest priority one. */) | |
df7492f9 KH |
7938 | (highestp) |
7939 | Lisp_Object highestp; | |
d46c5b12 KH |
7940 | { |
7941 | int i; | |
df7492f9 | 7942 | Lisp_Object val; |
6b89e3aa | 7943 | |
df7492f9 | 7944 | for (i = 0, val = Qnil; i < coding_category_max; i++) |
d46c5b12 | 7945 | { |
df7492f9 KH |
7946 | enum coding_category category = coding_priorities[i]; |
7947 | int id = coding_categories[category].id; | |
7948 | Lisp_Object attrs; | |
068a9dbd | 7949 | |
df7492f9 KH |
7950 | if (id < 0) |
7951 | continue; | |
7952 | attrs = CODING_ID_ATTRS (id); | |
7953 | if (! NILP (highestp)) | |
7954 | return CODING_ATTR_BASE_NAME (attrs); | |
7955 | val = Fcons (CODING_ATTR_BASE_NAME (attrs), val); | |
7956 | } | |
7957 | return Fnreverse (val); | |
7958 | } | |
068a9dbd | 7959 | |
f0064e1f | 7960 | static char *suffixes[] = { "-unix", "-dos", "-mac" }; |
068a9dbd KH |
7961 | |
7962 | static Lisp_Object | |
df7492f9 KH |
7963 | make_subsidiaries (base) |
7964 | Lisp_Object base; | |
068a9dbd | 7965 | { |
df7492f9 | 7966 | Lisp_Object subsidiaries; |
8f924df7 | 7967 | int base_name_len = SBYTES (SYMBOL_NAME (base)); |
df7492f9 KH |
7968 | char *buf = (char *) alloca (base_name_len + 6); |
7969 | int i; | |
068a9dbd | 7970 | |
8f924df7 | 7971 | bcopy (SDATA (SYMBOL_NAME (base)), buf, base_name_len); |
df7492f9 KH |
7972 | subsidiaries = Fmake_vector (make_number (3), Qnil); |
7973 | for (i = 0; i < 3; i++) | |
068a9dbd | 7974 | { |
df7492f9 KH |
7975 | bcopy (suffixes[i], buf + base_name_len, strlen (suffixes[i]) + 1); |
7976 | ASET (subsidiaries, i, intern (buf)); | |
068a9dbd | 7977 | } |
df7492f9 | 7978 | return subsidiaries; |
068a9dbd KH |
7979 | } |
7980 | ||
7981 | ||
df7492f9 KH |
7982 | DEFUN ("define-coding-system-internal", Fdefine_coding_system_internal, |
7983 | Sdefine_coding_system_internal, coding_arg_max, MANY, 0, | |
1fcd6c8b DL |
7984 | doc: /* For internal use only. |
7985 | usage: (define-coding-system-internal ...) */) | |
df7492f9 KH |
7986 | (nargs, args) |
7987 | int nargs; | |
7988 | Lisp_Object *args; | |
068a9dbd | 7989 | { |
df7492f9 KH |
7990 | Lisp_Object name; |
7991 | Lisp_Object spec_vec; /* [ ATTRS ALIASE EOL_TYPE ] */ | |
7992 | Lisp_Object attrs; /* Vector of attributes. */ | |
7993 | Lisp_Object eol_type; | |
7994 | Lisp_Object aliases; | |
7995 | Lisp_Object coding_type, charset_list, safe_charsets; | |
7996 | enum coding_category category; | |
7997 | Lisp_Object tail, val; | |
7998 | int max_charset_id = 0; | |
7999 | int i; | |
068a9dbd | 8000 | |
df7492f9 KH |
8001 | if (nargs < coding_arg_max) |
8002 | goto short_args; | |
068a9dbd | 8003 | |
df7492f9 | 8004 | attrs = Fmake_vector (make_number (coding_attr_last_index), Qnil); |
068a9dbd | 8005 | |
df7492f9 KH |
8006 | name = args[coding_arg_name]; |
8007 | CHECK_SYMBOL (name); | |
8008 | CODING_ATTR_BASE_NAME (attrs) = name; | |
068a9dbd | 8009 | |
df7492f9 KH |
8010 | val = args[coding_arg_mnemonic]; |
8011 | if (! STRINGP (val)) | |
8012 | CHECK_CHARACTER (val); | |
8013 | CODING_ATTR_MNEMONIC (attrs) = val; | |
068a9dbd | 8014 | |
df7492f9 KH |
8015 | coding_type = args[coding_arg_coding_type]; |
8016 | CHECK_SYMBOL (coding_type); | |
8017 | CODING_ATTR_TYPE (attrs) = coding_type; | |
068a9dbd | 8018 | |
df7492f9 KH |
8019 | charset_list = args[coding_arg_charset_list]; |
8020 | if (SYMBOLP (charset_list)) | |
8021 | { | |
8022 | if (EQ (charset_list, Qiso_2022)) | |
8023 | { | |
8024 | if (! EQ (coding_type, Qiso_2022)) | |
8025 | error ("Invalid charset-list"); | |
8026 | charset_list = Viso_2022_charset_list; | |
8027 | } | |
8028 | else if (EQ (charset_list, Qemacs_mule)) | |
8029 | { | |
8030 | if (! EQ (coding_type, Qemacs_mule)) | |
8031 | error ("Invalid charset-list"); | |
8032 | charset_list = Vemacs_mule_charset_list; | |
8033 | } | |
8034 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
8035 | if (max_charset_id < XFASTINT (XCAR (tail))) | |
8036 | max_charset_id = XFASTINT (XCAR (tail)); | |
8037 | } | |
068a9dbd KH |
8038 | else |
8039 | { | |
df7492f9 KH |
8040 | charset_list = Fcopy_sequence (charset_list); |
8041 | for (tail = charset_list; !NILP (tail); tail = Fcdr (tail)) | |
068a9dbd | 8042 | { |
df7492f9 KH |
8043 | struct charset *charset; |
8044 | ||
8045 | val = Fcar (tail); | |
8046 | CHECK_CHARSET_GET_CHARSET (val, charset); | |
8047 | if (EQ (coding_type, Qiso_2022) | |
8048 | ? CHARSET_ISO_FINAL (charset) < 0 | |
8049 | : EQ (coding_type, Qemacs_mule) | |
8050 | ? CHARSET_EMACS_MULE_ID (charset) < 0 | |
8051 | : 0) | |
8052 | error ("Can't handle charset `%s'", | |
8f924df7 | 8053 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
df7492f9 | 8054 | |
8f924df7 | 8055 | XSETCAR (tail, make_number (charset->id)); |
df7492f9 KH |
8056 | if (max_charset_id < charset->id) |
8057 | max_charset_id = charset->id; | |
068a9dbd KH |
8058 | } |
8059 | } | |
df7492f9 | 8060 | CODING_ATTR_CHARSET_LIST (attrs) = charset_list; |
068a9dbd | 8061 | |
df7492f9 KH |
8062 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), |
8063 | make_number (255)); | |
8064 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
8f924df7 | 8065 | SSET (safe_charsets, XFASTINT (XCAR (tail)), 0); |
df7492f9 | 8066 | CODING_ATTR_SAFE_CHARSETS (attrs) = safe_charsets; |
068a9dbd | 8067 | |
584948ac | 8068 | CODING_ATTR_ASCII_COMPAT (attrs) = args[coding_arg_ascii_compatible_p]; |
3a73fa5d | 8069 | |
df7492f9 KH |
8070 | val = args[coding_arg_decode_translation_table]; |
8071 | if (! NILP (val)) | |
8072 | CHECK_CHAR_TABLE (val); | |
8073 | CODING_ATTR_DECODE_TBL (attrs) = val; | |
3a73fa5d | 8074 | |
df7492f9 KH |
8075 | val = args[coding_arg_encode_translation_table]; |
8076 | if (! NILP (val)) | |
8077 | CHECK_CHAR_TABLE (val); | |
8078 | CODING_ATTR_ENCODE_TBL (attrs) = val; | |
d46c5b12 | 8079 | |
df7492f9 KH |
8080 | val = args[coding_arg_post_read_conversion]; |
8081 | CHECK_SYMBOL (val); | |
8082 | CODING_ATTR_POST_READ (attrs) = val; | |
d46c5b12 | 8083 | |
df7492f9 KH |
8084 | val = args[coding_arg_pre_write_conversion]; |
8085 | CHECK_SYMBOL (val); | |
8086 | CODING_ATTR_PRE_WRITE (attrs) = val; | |
3a73fa5d | 8087 | |
df7492f9 KH |
8088 | val = args[coding_arg_default_char]; |
8089 | if (NILP (val)) | |
8090 | CODING_ATTR_DEFAULT_CHAR (attrs) = make_number (' '); | |
8091 | else | |
8092 | { | |
8f924df7 | 8093 | CHECK_CHARACTER (val); |
df7492f9 KH |
8094 | CODING_ATTR_DEFAULT_CHAR (attrs) = val; |
8095 | } | |
4031e2bf | 8096 | |
8f924df7 KH |
8097 | val = args[coding_arg_for_unibyte]; |
8098 | CODING_ATTR_FOR_UNIBYTE (attrs) = NILP (val) ? Qnil : Qt; | |
3a73fa5d | 8099 | |
df7492f9 KH |
8100 | val = args[coding_arg_plist]; |
8101 | CHECK_LIST (val); | |
8102 | CODING_ATTR_PLIST (attrs) = val; | |
3a73fa5d | 8103 | |
df7492f9 KH |
8104 | if (EQ (coding_type, Qcharset)) |
8105 | { | |
4187a77d | 8106 | Lisp_Object list; |
c7c66a95 KH |
8107 | /* Generate a lisp vector of 256 elements. Each element is nil, |
8108 | integer, or a list of charset IDs. | |
3a73fa5d | 8109 | |
c7c66a95 KH |
8110 | If Nth element is nil, the byte code N is invalid in this |
8111 | coding system. | |
4ed46869 | 8112 | |
c7c66a95 KH |
8113 | If Nth element is a number NUM, N is the first byte of a |
8114 | charset whose ID is NUM. | |
4ed46869 | 8115 | |
c7c66a95 KH |
8116 | If Nth element is a list of charset IDs, N is the first byte |
8117 | of one of them. The list is sorted by dimensions of the | |
8118 | charsets. A charset of smaller dimension comes firtst. | |
8119 | */ | |
4187a77d KH |
8120 | for (list = Qnil, tail = charset_list; CONSP (tail); tail = XCDR (tail)) |
8121 | { | |
8122 | struct charset *charset = CHARSET_FROM_ID (XFASTINT (XCAR (tail))); | |
5f1cd180 | 8123 | |
4187a77d KH |
8124 | if (charset->method == CHARSET_METHOD_SUPERSET) |
8125 | { | |
8126 | val = CHARSET_SUPERSET (charset); | |
8127 | for (; CONSP (val); val = XCDR (val)) | |
8f924df7 | 8128 | list = Fcons (XCAR (XCAR (val)), list); |
4187a77d KH |
8129 | } |
8130 | else | |
8131 | list = Fcons (XCAR (tail), list); | |
8132 | } | |
ec6d2bb8 | 8133 | |
df7492f9 | 8134 | val = Fmake_vector (make_number (256), Qnil); |
4ed46869 | 8135 | |
4187a77d | 8136 | for (tail = Fnreverse (list); CONSP (tail); tail = XCDR (tail)) |
df7492f9 | 8137 | { |
c7c66a95 KH |
8138 | struct charset *charset = CHARSET_FROM_ID (XFASTINT (XCAR (tail))); |
8139 | int dim = CHARSET_DIMENSION (charset); | |
8140 | int idx = (dim - 1) * 4; | |
4ed46869 | 8141 | |
584948ac KH |
8142 | if (CHARSET_ASCII_COMPATIBLE_P (charset)) |
8143 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
4031e2bf | 8144 | |
15d143f7 KH |
8145 | for (i = charset->code_space[idx]; |
8146 | i <= charset->code_space[idx + 1]; i++) | |
8147 | { | |
c7c66a95 KH |
8148 | Lisp_Object tmp, tmp2; |
8149 | int dim2; | |
ec6d2bb8 | 8150 | |
c7c66a95 KH |
8151 | tmp = AREF (val, i); |
8152 | if (NILP (tmp)) | |
8153 | tmp = XCAR (tail); | |
8154 | else if (NUMBERP (tmp)) | |
8155 | { | |
8156 | dim2 = CHARSET_DIMENSION (CHARSET_FROM_ID (XFASTINT (tmp))); | |
8157 | if (dim < dim2) | |
c7c66a95 | 8158 | tmp = Fcons (XCAR (tail), Fcons (tmp, Qnil)); |
f9d71dcd KH |
8159 | else |
8160 | tmp = Fcons (tmp, Fcons (XCAR (tail), Qnil)); | |
c7c66a95 | 8161 | } |
15d143f7 | 8162 | else |
c7c66a95 KH |
8163 | { |
8164 | for (tmp2 = tmp; CONSP (tmp2); tmp2 = XCDR (tmp2)) | |
8165 | { | |
8166 | dim2 = CHARSET_DIMENSION (CHARSET_FROM_ID (XFASTINT (XCAR (tmp2)))); | |
8167 | if (dim < dim2) | |
8168 | break; | |
8169 | } | |
8170 | if (NILP (tmp2)) | |
8171 | tmp = nconc2 (tmp, Fcons (XCAR (tail), Qnil)); | |
8172 | else | |
8173 | { | |
8174 | XSETCDR (tmp2, Fcons (XCAR (tmp2), XCDR (tmp2))); | |
8175 | XSETCAR (tmp2, XCAR (tail)); | |
8176 | } | |
8177 | } | |
8178 | ASET (val, i, tmp); | |
15d143f7 | 8179 | } |
df7492f9 KH |
8180 | } |
8181 | ASET (attrs, coding_attr_charset_valids, val); | |
8182 | category = coding_category_charset; | |
8183 | } | |
8184 | else if (EQ (coding_type, Qccl)) | |
8185 | { | |
8186 | Lisp_Object valids; | |
ecec61c1 | 8187 | |
df7492f9 KH |
8188 | if (nargs < coding_arg_ccl_max) |
8189 | goto short_args; | |
ecec61c1 | 8190 | |
df7492f9 KH |
8191 | val = args[coding_arg_ccl_decoder]; |
8192 | CHECK_CCL_PROGRAM (val); | |
8193 | if (VECTORP (val)) | |
8194 | val = Fcopy_sequence (val); | |
8195 | ASET (attrs, coding_attr_ccl_decoder, val); | |
ecec61c1 | 8196 | |
df7492f9 KH |
8197 | val = args[coding_arg_ccl_encoder]; |
8198 | CHECK_CCL_PROGRAM (val); | |
8199 | if (VECTORP (val)) | |
8200 | val = Fcopy_sequence (val); | |
8201 | ASET (attrs, coding_attr_ccl_encoder, val); | |
ecec61c1 | 8202 | |
df7492f9 KH |
8203 | val = args[coding_arg_ccl_valids]; |
8204 | valids = Fmake_string (make_number (256), make_number (0)); | |
8205 | for (tail = val; !NILP (tail); tail = Fcdr (tail)) | |
8206 | { | |
8dcbea82 | 8207 | int from, to; |
ecec61c1 | 8208 | |
df7492f9 KH |
8209 | val = Fcar (tail); |
8210 | if (INTEGERP (val)) | |
8dcbea82 KH |
8211 | { |
8212 | from = to = XINT (val); | |
8213 | if (from < 0 || from > 255) | |
8214 | args_out_of_range_3 (val, make_number (0), make_number (255)); | |
8215 | } | |
df7492f9 KH |
8216 | else |
8217 | { | |
df7492f9 | 8218 | CHECK_CONS (val); |
8f924df7 KH |
8219 | CHECK_NATNUM_CAR (val); |
8220 | CHECK_NATNUM_CDR (val); | |
df7492f9 | 8221 | from = XINT (XCAR (val)); |
8f924df7 | 8222 | if (from > 255) |
8dcbea82 KH |
8223 | args_out_of_range_3 (XCAR (val), |
8224 | make_number (0), make_number (255)); | |
df7492f9 | 8225 | to = XINT (XCDR (val)); |
8dcbea82 KH |
8226 | if (to < from || to > 255) |
8227 | args_out_of_range_3 (XCDR (val), | |
8228 | XCAR (val), make_number (255)); | |
df7492f9 | 8229 | } |
8dcbea82 | 8230 | for (i = from; i <= to; i++) |
8f924df7 | 8231 | SSET (valids, i, 1); |
df7492f9 KH |
8232 | } |
8233 | ASET (attrs, coding_attr_ccl_valids, valids); | |
4ed46869 | 8234 | |
df7492f9 | 8235 | category = coding_category_ccl; |
55ab7be3 | 8236 | } |
df7492f9 | 8237 | else if (EQ (coding_type, Qutf_16)) |
55ab7be3 | 8238 | { |
df7492f9 | 8239 | Lisp_Object bom, endian; |
4ed46869 | 8240 | |
584948ac | 8241 | CODING_ATTR_ASCII_COMPAT (attrs) = Qnil; |
4ed46869 | 8242 | |
df7492f9 KH |
8243 | if (nargs < coding_arg_utf16_max) |
8244 | goto short_args; | |
4ed46869 | 8245 | |
df7492f9 KH |
8246 | bom = args[coding_arg_utf16_bom]; |
8247 | if (! NILP (bom) && ! EQ (bom, Qt)) | |
8248 | { | |
8249 | CHECK_CONS (bom); | |
8f924df7 KH |
8250 | val = XCAR (bom); |
8251 | CHECK_CODING_SYSTEM (val); | |
8252 | val = XCDR (bom); | |
8253 | CHECK_CODING_SYSTEM (val); | |
df7492f9 KH |
8254 | } |
8255 | ASET (attrs, coding_attr_utf_16_bom, bom); | |
8256 | ||
8257 | endian = args[coding_arg_utf16_endian]; | |
b49a1807 KH |
8258 | CHECK_SYMBOL (endian); |
8259 | if (NILP (endian)) | |
8260 | endian = Qbig; | |
8261 | else if (! EQ (endian, Qbig) && ! EQ (endian, Qlittle)) | |
8f924df7 | 8262 | error ("Invalid endian: %s", SDATA (SYMBOL_NAME (endian))); |
df7492f9 KH |
8263 | ASET (attrs, coding_attr_utf_16_endian, endian); |
8264 | ||
8265 | category = (CONSP (bom) | |
8266 | ? coding_category_utf_16_auto | |
8267 | : NILP (bom) | |
b49a1807 | 8268 | ? (EQ (endian, Qbig) |
df7492f9 KH |
8269 | ? coding_category_utf_16_be_nosig |
8270 | : coding_category_utf_16_le_nosig) | |
b49a1807 | 8271 | : (EQ (endian, Qbig) |
df7492f9 KH |
8272 | ? coding_category_utf_16_be |
8273 | : coding_category_utf_16_le)); | |
8274 | } | |
8275 | else if (EQ (coding_type, Qiso_2022)) | |
8276 | { | |
8277 | Lisp_Object initial, reg_usage, request, flags; | |
4776e638 | 8278 | int i; |
1397dc18 | 8279 | |
df7492f9 KH |
8280 | if (nargs < coding_arg_iso2022_max) |
8281 | goto short_args; | |
8282 | ||
8283 | initial = Fcopy_sequence (args[coding_arg_iso2022_initial]); | |
8284 | CHECK_VECTOR (initial); | |
8285 | for (i = 0; i < 4; i++) | |
8286 | { | |
8287 | val = Faref (initial, make_number (i)); | |
8288 | if (! NILP (val)) | |
8289 | { | |
584948ac KH |
8290 | struct charset *charset; |
8291 | ||
8292 | CHECK_CHARSET_GET_CHARSET (val, charset); | |
8293 | ASET (initial, i, make_number (CHARSET_ID (charset))); | |
8294 | if (i == 0 && CHARSET_ASCII_COMPATIBLE_P (charset)) | |
8295 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
df7492f9 KH |
8296 | } |
8297 | else | |
8298 | ASET (initial, i, make_number (-1)); | |
8299 | } | |
8300 | ||
8301 | reg_usage = args[coding_arg_iso2022_reg_usage]; | |
8302 | CHECK_CONS (reg_usage); | |
8f924df7 KH |
8303 | CHECK_NUMBER_CAR (reg_usage); |
8304 | CHECK_NUMBER_CDR (reg_usage); | |
df7492f9 KH |
8305 | |
8306 | request = Fcopy_sequence (args[coding_arg_iso2022_request]); | |
8307 | for (tail = request; ! NILP (tail); tail = Fcdr (tail)) | |
1397dc18 | 8308 | { |
df7492f9 | 8309 | int id; |
8f924df7 | 8310 | Lisp_Object tmp; |
df7492f9 KH |
8311 | |
8312 | val = Fcar (tail); | |
8313 | CHECK_CONS (val); | |
8f924df7 KH |
8314 | tmp = XCAR (val); |
8315 | CHECK_CHARSET_GET_ID (tmp, id); | |
8316 | CHECK_NATNUM_CDR (val); | |
df7492f9 KH |
8317 | if (XINT (XCDR (val)) >= 4) |
8318 | error ("Invalid graphic register number: %d", XINT (XCDR (val))); | |
8f924df7 | 8319 | XSETCAR (val, make_number (id)); |
1397dc18 | 8320 | } |
4ed46869 | 8321 | |
df7492f9 KH |
8322 | flags = args[coding_arg_iso2022_flags]; |
8323 | CHECK_NATNUM (flags); | |
8324 | i = XINT (flags); | |
8325 | if (EQ (args[coding_arg_charset_list], Qiso_2022)) | |
8326 | flags = make_number (i | CODING_ISO_FLAG_FULL_SUPPORT); | |
8327 | ||
8328 | ASET (attrs, coding_attr_iso_initial, initial); | |
8329 | ASET (attrs, coding_attr_iso_usage, reg_usage); | |
8330 | ASET (attrs, coding_attr_iso_request, request); | |
8331 | ASET (attrs, coding_attr_iso_flags, flags); | |
8332 | setup_iso_safe_charsets (attrs); | |
8333 | ||
8334 | if (i & CODING_ISO_FLAG_SEVEN_BITS) | |
8335 | category = ((i & (CODING_ISO_FLAG_LOCKING_SHIFT | |
8336 | | CODING_ISO_FLAG_SINGLE_SHIFT)) | |
8337 | ? coding_category_iso_7_else | |
8338 | : EQ (args[coding_arg_charset_list], Qiso_2022) | |
8339 | ? coding_category_iso_7 | |
8340 | : coding_category_iso_7_tight); | |
8341 | else | |
8342 | { | |
8343 | int id = XINT (AREF (initial, 1)); | |
8344 | ||
c6fb6e98 | 8345 | category = (((i & CODING_ISO_FLAG_LOCKING_SHIFT) |
df7492f9 KH |
8346 | || EQ (args[coding_arg_charset_list], Qiso_2022) |
8347 | || id < 0) | |
8348 | ? coding_category_iso_8_else | |
8349 | : (CHARSET_DIMENSION (CHARSET_FROM_ID (id)) == 1) | |
8350 | ? coding_category_iso_8_1 | |
8351 | : coding_category_iso_8_2); | |
8352 | } | |
0ce7886f KH |
8353 | if (category != coding_category_iso_8_1 |
8354 | && category != coding_category_iso_8_2) | |
8355 | CODING_ATTR_ASCII_COMPAT (attrs) = Qnil; | |
df7492f9 KH |
8356 | } |
8357 | else if (EQ (coding_type, Qemacs_mule)) | |
c28a9453 | 8358 | { |
df7492f9 KH |
8359 | if (EQ (args[coding_arg_charset_list], Qemacs_mule)) |
8360 | ASET (attrs, coding_attr_emacs_mule_full, Qt); | |
584948ac | 8361 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; |
df7492f9 | 8362 | category = coding_category_emacs_mule; |
c28a9453 | 8363 | } |
df7492f9 | 8364 | else if (EQ (coding_type, Qshift_jis)) |
c28a9453 | 8365 | { |
df7492f9 KH |
8366 | |
8367 | struct charset *charset; | |
8368 | ||
8369 | if (XINT (Flength (charset_list)) != 3) | |
8370 | error ("There should be just three charsets"); | |
8371 | ||
8372 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
8373 | if (CHARSET_DIMENSION (charset) != 1) | |
8374 | error ("Dimension of charset %s is not one", | |
8f924df7 | 8375 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
584948ac KH |
8376 | if (CHARSET_ASCII_COMPATIBLE_P (charset)) |
8377 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
df7492f9 KH |
8378 | |
8379 | charset_list = XCDR (charset_list); | |
8380 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
8381 | if (CHARSET_DIMENSION (charset) != 1) | |
8382 | error ("Dimension of charset %s is not one", | |
8f924df7 | 8383 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
df7492f9 KH |
8384 | |
8385 | charset_list = XCDR (charset_list); | |
8386 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
8387 | if (CHARSET_DIMENSION (charset) != 2) | |
8388 | error ("Dimension of charset %s is not two", | |
8f924df7 | 8389 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
df7492f9 KH |
8390 | |
8391 | category = coding_category_sjis; | |
8392 | Vsjis_coding_system = name; | |
c28a9453 | 8393 | } |
df7492f9 KH |
8394 | else if (EQ (coding_type, Qbig5)) |
8395 | { | |
8396 | struct charset *charset; | |
4ed46869 | 8397 | |
df7492f9 KH |
8398 | if (XINT (Flength (charset_list)) != 2) |
8399 | error ("There should be just two charsets"); | |
8400 | ||
8401 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
8402 | if (CHARSET_DIMENSION (charset) != 1) | |
8403 | error ("Dimension of charset %s is not one", | |
8f924df7 | 8404 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
584948ac KH |
8405 | if (CHARSET_ASCII_COMPATIBLE_P (charset)) |
8406 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
df7492f9 KH |
8407 | |
8408 | charset_list = XCDR (charset_list); | |
8409 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
8410 | if (CHARSET_DIMENSION (charset) != 2) | |
8411 | error ("Dimension of charset %s is not two", | |
8f924df7 | 8412 | SDATA (SYMBOL_NAME (CHARSET_NAME (charset)))); |
4ed46869 | 8413 | |
df7492f9 KH |
8414 | category = coding_category_big5; |
8415 | Vbig5_coding_system = name; | |
8416 | } | |
8417 | else if (EQ (coding_type, Qraw_text)) | |
c28a9453 | 8418 | { |
584948ac KH |
8419 | category = coding_category_raw_text; |
8420 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
c28a9453 | 8421 | } |
df7492f9 | 8422 | else if (EQ (coding_type, Qutf_8)) |
4ed46869 | 8423 | { |
584948ac KH |
8424 | category = coding_category_utf_8; |
8425 | CODING_ATTR_ASCII_COMPAT (attrs) = Qt; | |
4ed46869 | 8426 | } |
df7492f9 KH |
8427 | else if (EQ (coding_type, Qundecided)) |
8428 | category = coding_category_undecided; | |
4ed46869 | 8429 | else |
df7492f9 | 8430 | error ("Invalid coding system type: %s", |
8f924df7 | 8431 | SDATA (SYMBOL_NAME (coding_type))); |
4ed46869 | 8432 | |
df7492f9 | 8433 | CODING_ATTR_CATEGORY (attrs) = make_number (category); |
01378f49 KH |
8434 | CODING_ATTR_PLIST (attrs) |
8435 | = Fcons (QCcategory, Fcons (AREF (Vcoding_category_table, category), | |
8436 | CODING_ATTR_PLIST (attrs))); | |
c4825358 | 8437 | |
df7492f9 KH |
8438 | eol_type = args[coding_arg_eol_type]; |
8439 | if (! NILP (eol_type) | |
8440 | && ! EQ (eol_type, Qunix) | |
8441 | && ! EQ (eol_type, Qdos) | |
8442 | && ! EQ (eol_type, Qmac)) | |
8443 | error ("Invalid eol-type"); | |
4ed46869 | 8444 | |
df7492f9 | 8445 | aliases = Fcons (name, Qnil); |
4ed46869 | 8446 | |
df7492f9 KH |
8447 | if (NILP (eol_type)) |
8448 | { | |
8449 | eol_type = make_subsidiaries (name); | |
8450 | for (i = 0; i < 3; i++) | |
1397dc18 | 8451 | { |
df7492f9 KH |
8452 | Lisp_Object this_spec, this_name, this_aliases, this_eol_type; |
8453 | ||
8454 | this_name = AREF (eol_type, i); | |
8455 | this_aliases = Fcons (this_name, Qnil); | |
8456 | this_eol_type = (i == 0 ? Qunix : i == 1 ? Qdos : Qmac); | |
8457 | this_spec = Fmake_vector (make_number (3), attrs); | |
8458 | ASET (this_spec, 1, this_aliases); | |
8459 | ASET (this_spec, 2, this_eol_type); | |
8460 | Fputhash (this_name, this_spec, Vcoding_system_hash_table); | |
8461 | Vcoding_system_list = Fcons (this_name, Vcoding_system_list); | |
8462 | Vcoding_system_alist = Fcons (Fcons (Fsymbol_name (this_name), Qnil), | |
8463 | Vcoding_system_alist); | |
1397dc18 | 8464 | } |
d46c5b12 | 8465 | } |
4ed46869 | 8466 | |
df7492f9 KH |
8467 | spec_vec = Fmake_vector (make_number (3), attrs); |
8468 | ASET (spec_vec, 1, aliases); | |
8469 | ASET (spec_vec, 2, eol_type); | |
48b0f3ae | 8470 | |
df7492f9 KH |
8471 | Fputhash (name, spec_vec, Vcoding_system_hash_table); |
8472 | Vcoding_system_list = Fcons (name, Vcoding_system_list); | |
8473 | Vcoding_system_alist = Fcons (Fcons (Fsymbol_name (name), Qnil), | |
8474 | Vcoding_system_alist); | |
48b0f3ae | 8475 | |
df7492f9 KH |
8476 | { |
8477 | int id = coding_categories[category].id; | |
48b0f3ae | 8478 | |
df7492f9 KH |
8479 | if (id < 0 || EQ (name, CODING_ID_NAME (id))) |
8480 | setup_coding_system (name, &coding_categories[category]); | |
8481 | } | |
48b0f3ae | 8482 | |
d46c5b12 | 8483 | return Qnil; |
48b0f3ae | 8484 | |
df7492f9 KH |
8485 | short_args: |
8486 | return Fsignal (Qwrong_number_of_arguments, | |
8487 | Fcons (intern ("define-coding-system-internal"), | |
8488 | make_number (nargs))); | |
d46c5b12 | 8489 | } |
4ed46869 | 8490 | |
da7db224 | 8491 | /* Fixme: should this record the alias relationships for |
e1c23804 | 8492 | diagnostics? Should it update coding-system-list? */ |
df7492f9 KH |
8493 | DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, |
8494 | Sdefine_coding_system_alias, 2, 2, 0, | |
8495 | doc: /* Define ALIAS as an alias for CODING-SYSTEM. */) | |
8496 | (alias, coding_system) | |
8497 | Lisp_Object alias, coding_system; | |
66cfb530 | 8498 | { |
df7492f9 | 8499 | Lisp_Object spec, aliases, eol_type; |
4ed46869 | 8500 | |
df7492f9 KH |
8501 | CHECK_SYMBOL (alias); |
8502 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
8503 | aliases = AREF (spec, 1); | |
8504 | while (!NILP (XCDR (aliases))) | |
8505 | aliases = XCDR (aliases); | |
8f924df7 | 8506 | XSETCDR (aliases, Fcons (alias, Qnil)); |
4ed46869 | 8507 | |
df7492f9 KH |
8508 | eol_type = AREF (spec, 2); |
8509 | if (VECTORP (eol_type)) | |
4ed46869 | 8510 | { |
df7492f9 KH |
8511 | Lisp_Object subsidiaries; |
8512 | int i; | |
4ed46869 | 8513 | |
df7492f9 KH |
8514 | subsidiaries = make_subsidiaries (alias); |
8515 | for (i = 0; i < 3; i++) | |
8516 | Fdefine_coding_system_alias (AREF (subsidiaries, i), | |
8517 | AREF (eol_type, i)); | |
8518 | ||
8519 | ASET (spec, 2, subsidiaries); | |
4ed46869 | 8520 | } |
df7492f9 KH |
8521 | |
8522 | Fputhash (alias, spec, Vcoding_system_hash_table); | |
5bad0796 DL |
8523 | Vcoding_system_alist = Fcons (Fcons (Fsymbol_name (alias), Qnil), |
8524 | Vcoding_system_alist); | |
66cfb530 | 8525 | |
4ed46869 KH |
8526 | return Qnil; |
8527 | } | |
8528 | ||
df7492f9 KH |
8529 | DEFUN ("coding-system-base", Fcoding_system_base, Scoding_system_base, |
8530 | 1, 1, 0, | |
8531 | doc: /* Return the base of CODING-SYSTEM. | |
da7db224 | 8532 | Any alias or subsidiary coding system is not a base coding system. */) |
df7492f9 KH |
8533 | (coding_system) |
8534 | Lisp_Object coding_system; | |
d46c5b12 | 8535 | { |
df7492f9 | 8536 | Lisp_Object spec, attrs; |
d46c5b12 | 8537 | |
df7492f9 KH |
8538 | if (NILP (coding_system)) |
8539 | return (Qno_conversion); | |
8540 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
8541 | attrs = AREF (spec, 0); | |
8542 | return CODING_ATTR_BASE_NAME (attrs); | |
8543 | } | |
1397dc18 | 8544 | |
df7492f9 KH |
8545 | DEFUN ("coding-system-plist", Fcoding_system_plist, Scoding_system_plist, |
8546 | 1, 1, 0, | |
8547 | doc: "Return the property list of CODING-SYSTEM.") | |
8548 | (coding_system) | |
8549 | Lisp_Object coding_system; | |
8550 | { | |
8551 | Lisp_Object spec, attrs; | |
1397dc18 | 8552 | |
df7492f9 KH |
8553 | if (NILP (coding_system)) |
8554 | coding_system = Qno_conversion; | |
8555 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
8556 | attrs = AREF (spec, 0); | |
8557 | return CODING_ATTR_PLIST (attrs); | |
d46c5b12 KH |
8558 | } |
8559 | ||
df7492f9 KH |
8560 | |
8561 | DEFUN ("coding-system-aliases", Fcoding_system_aliases, Scoding_system_aliases, | |
8562 | 1, 1, 0, | |
da7db224 | 8563 | doc: /* Return the list of aliases of CODING-SYSTEM. */) |
df7492f9 KH |
8564 | (coding_system) |
8565 | Lisp_Object coding_system; | |
66cfb530 | 8566 | { |
df7492f9 | 8567 | Lisp_Object spec; |
84d60297 | 8568 | |
df7492f9 KH |
8569 | if (NILP (coding_system)) |
8570 | coding_system = Qno_conversion; | |
8571 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
da7db224 | 8572 | return AREF (spec, 1); |
df7492f9 | 8573 | } |
66cfb530 | 8574 | |
df7492f9 KH |
8575 | DEFUN ("coding-system-eol-type", Fcoding_system_eol_type, |
8576 | Scoding_system_eol_type, 1, 1, 0, | |
8577 | doc: /* Return eol-type of CODING-SYSTEM. | |
8578 | An eol-type is integer 0, 1, 2, or a vector of coding systems. | |
66cfb530 | 8579 | |
df7492f9 KH |
8580 | Integer values 0, 1, and 2 indicate a format of end-of-line; LF, CRLF, |
8581 | and CR respectively. | |
66cfb530 | 8582 | |
df7492f9 KH |
8583 | A vector value indicates that a format of end-of-line should be |
8584 | detected automatically. Nth element of the vector is the subsidiary | |
8585 | coding system whose eol-type is N. */) | |
6b89e3aa KH |
8586 | (coding_system) |
8587 | Lisp_Object coding_system; | |
8588 | { | |
df7492f9 KH |
8589 | Lisp_Object spec, eol_type; |
8590 | int n; | |
6b89e3aa | 8591 | |
df7492f9 KH |
8592 | if (NILP (coding_system)) |
8593 | coding_system = Qno_conversion; | |
8594 | if (! CODING_SYSTEM_P (coding_system)) | |
8595 | return Qnil; | |
8596 | spec = CODING_SYSTEM_SPEC (coding_system); | |
8597 | eol_type = AREF (spec, 2); | |
8598 | if (VECTORP (eol_type)) | |
8599 | return Fcopy_sequence (eol_type); | |
8600 | n = EQ (eol_type, Qunix) ? 0 : EQ (eol_type, Qdos) ? 1 : 2; | |
8601 | return make_number (n); | |
6b89e3aa KH |
8602 | } |
8603 | ||
4ed46869 KH |
8604 | #endif /* emacs */ |
8605 | ||
8606 | \f | |
1397dc18 | 8607 | /*** 9. Post-amble ***/ |
4ed46869 | 8608 | |
dfcf069d | 8609 | void |
4ed46869 KH |
8610 | init_coding_once () |
8611 | { | |
8612 | int i; | |
8613 | ||
df7492f9 KH |
8614 | for (i = 0; i < coding_category_max; i++) |
8615 | { | |
8616 | coding_categories[i].id = -1; | |
8617 | coding_priorities[i] = i; | |
8618 | } | |
4ed46869 KH |
8619 | |
8620 | /* ISO2022 specific initialize routine. */ | |
8621 | for (i = 0; i < 0x20; i++) | |
b73bfc1c | 8622 | iso_code_class[i] = ISO_control_0; |
4ed46869 KH |
8623 | for (i = 0x21; i < 0x7F; i++) |
8624 | iso_code_class[i] = ISO_graphic_plane_0; | |
8625 | for (i = 0x80; i < 0xA0; i++) | |
b73bfc1c | 8626 | iso_code_class[i] = ISO_control_1; |
4ed46869 KH |
8627 | for (i = 0xA1; i < 0xFF; i++) |
8628 | iso_code_class[i] = ISO_graphic_plane_1; | |
8629 | iso_code_class[0x20] = iso_code_class[0x7F] = ISO_0x20_or_0x7F; | |
8630 | iso_code_class[0xA0] = iso_code_class[0xFF] = ISO_0xA0_or_0xFF; | |
8631 | iso_code_class[ISO_CODE_CR] = ISO_carriage_return; | |
8632 | iso_code_class[ISO_CODE_SO] = ISO_shift_out; | |
8633 | iso_code_class[ISO_CODE_SI] = ISO_shift_in; | |
8634 | iso_code_class[ISO_CODE_SS2_7] = ISO_single_shift_2_7; | |
8635 | iso_code_class[ISO_CODE_ESC] = ISO_escape; | |
8636 | iso_code_class[ISO_CODE_SS2] = ISO_single_shift_2; | |
8637 | iso_code_class[ISO_CODE_SS3] = ISO_single_shift_3; | |
8638 | iso_code_class[ISO_CODE_CSI] = ISO_control_sequence_introducer; | |
8639 | ||
b843d1ae | 8640 | inhibit_pre_post_conversion = 0; |
df7492f9 KH |
8641 | |
8642 | for (i = 0; i < 256; i++) | |
8643 | { | |
8644 | emacs_mule_bytes[i] = 1; | |
8645 | } | |
7c78e542 KH |
8646 | emacs_mule_bytes[EMACS_MULE_LEADING_CODE_PRIVATE_11] = 3; |
8647 | emacs_mule_bytes[EMACS_MULE_LEADING_CODE_PRIVATE_12] = 3; | |
8648 | emacs_mule_bytes[EMACS_MULE_LEADING_CODE_PRIVATE_21] = 4; | |
8649 | emacs_mule_bytes[EMACS_MULE_LEADING_CODE_PRIVATE_22] = 4; | |
e0e989f6 KH |
8650 | } |
8651 | ||
8652 | #ifdef emacs | |
8653 | ||
dfcf069d | 8654 | void |
e0e989f6 KH |
8655 | syms_of_coding () |
8656 | { | |
df7492f9 | 8657 | staticpro (&Vcoding_system_hash_table); |
8f924df7 KH |
8658 | { |
8659 | Lisp_Object args[2]; | |
8660 | args[0] = QCtest; | |
8661 | args[1] = Qeq; | |
8662 | Vcoding_system_hash_table = Fmake_hash_table (2, args); | |
8663 | } | |
df7492f9 KH |
8664 | |
8665 | staticpro (&Vsjis_coding_system); | |
8666 | Vsjis_coding_system = Qnil; | |
e0e989f6 | 8667 | |
df7492f9 KH |
8668 | staticpro (&Vbig5_coding_system); |
8669 | Vbig5_coding_system = Qnil; | |
8670 | ||
8671 | staticpro (&Vcode_conversion_work_buf_list); | |
8672 | Vcode_conversion_work_buf_list = Qnil; | |
e0e989f6 | 8673 | |
df7492f9 KH |
8674 | staticpro (&Vcode_conversion_reused_work_buf); |
8675 | Vcode_conversion_reused_work_buf = Qnil; | |
8676 | ||
8677 | DEFSYM (Qcharset, "charset"); | |
8678 | DEFSYM (Qtarget_idx, "target-idx"); | |
8679 | DEFSYM (Qcoding_system_history, "coding-system-history"); | |
bb0115a2 RS |
8680 | Fset (Qcoding_system_history, Qnil); |
8681 | ||
9ce27fde | 8682 | /* Target FILENAME is the first argument. */ |
e0e989f6 | 8683 | Fput (Qinsert_file_contents, Qtarget_idx, make_number (0)); |
9ce27fde | 8684 | /* Target FILENAME is the third argument. */ |
e0e989f6 KH |
8685 | Fput (Qwrite_region, Qtarget_idx, make_number (2)); |
8686 | ||
df7492f9 | 8687 | DEFSYM (Qcall_process, "call-process"); |
9ce27fde | 8688 | /* Target PROGRAM is the first argument. */ |
e0e989f6 KH |
8689 | Fput (Qcall_process, Qtarget_idx, make_number (0)); |
8690 | ||
df7492f9 | 8691 | DEFSYM (Qcall_process_region, "call-process-region"); |
9ce27fde | 8692 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
8693 | Fput (Qcall_process_region, Qtarget_idx, make_number (2)); |
8694 | ||
df7492f9 | 8695 | DEFSYM (Qstart_process, "start-process"); |
9ce27fde | 8696 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
8697 | Fput (Qstart_process, Qtarget_idx, make_number (2)); |
8698 | ||
df7492f9 | 8699 | DEFSYM (Qopen_network_stream, "open-network-stream"); |
9ce27fde | 8700 | /* Target SERVICE is the fourth argument. */ |
e0e989f6 KH |
8701 | Fput (Qopen_network_stream, Qtarget_idx, make_number (3)); |
8702 | ||
df7492f9 KH |
8703 | DEFSYM (Qcoding_system, "coding-system"); |
8704 | DEFSYM (Qcoding_aliases, "coding-aliases"); | |
4ed46869 | 8705 | |
df7492f9 KH |
8706 | DEFSYM (Qeol_type, "eol-type"); |
8707 | DEFSYM (Qunix, "unix"); | |
8708 | DEFSYM (Qdos, "dos"); | |
4ed46869 | 8709 | |
df7492f9 KH |
8710 | DEFSYM (Qbuffer_file_coding_system, "buffer-file-coding-system"); |
8711 | DEFSYM (Qpost_read_conversion, "post-read-conversion"); | |
8712 | DEFSYM (Qpre_write_conversion, "pre-write-conversion"); | |
8713 | DEFSYM (Qdefault_char, "default-char"); | |
8714 | DEFSYM (Qundecided, "undecided"); | |
8715 | DEFSYM (Qno_conversion, "no-conversion"); | |
8716 | DEFSYM (Qraw_text, "raw-text"); | |
4ed46869 | 8717 | |
df7492f9 | 8718 | DEFSYM (Qiso_2022, "iso-2022"); |
4ed46869 | 8719 | |
df7492f9 | 8720 | DEFSYM (Qutf_8, "utf-8"); |
8f924df7 | 8721 | DEFSYM (Qutf_8_emacs, "utf-8-emacs"); |
27901516 | 8722 | |
df7492f9 | 8723 | DEFSYM (Qutf_16, "utf-16"); |
df7492f9 KH |
8724 | DEFSYM (Qbig, "big"); |
8725 | DEFSYM (Qlittle, "little"); | |
27901516 | 8726 | |
df7492f9 KH |
8727 | DEFSYM (Qshift_jis, "shift-jis"); |
8728 | DEFSYM (Qbig5, "big5"); | |
4ed46869 | 8729 | |
df7492f9 | 8730 | DEFSYM (Qcoding_system_p, "coding-system-p"); |
4ed46869 | 8731 | |
df7492f9 | 8732 | DEFSYM (Qcoding_system_error, "coding-system-error"); |
4ed46869 KH |
8733 | Fput (Qcoding_system_error, Qerror_conditions, |
8734 | Fcons (Qcoding_system_error, Fcons (Qerror, Qnil))); | |
8735 | Fput (Qcoding_system_error, Qerror_message, | |
9ce27fde | 8736 | build_string ("Invalid coding system")); |
4ed46869 | 8737 | |
05e6f5dc KH |
8738 | /* Intern this now in case it isn't already done. |
8739 | Setting this variable twice is harmless. | |
8740 | But don't staticpro it here--that is done in alloc.c. */ | |
8741 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
70c22245 | 8742 | |
df7492f9 | 8743 | DEFSYM (Qtranslation_table, "translation-table"); |
1397dc18 | 8744 | Fput (Qtranslation_table, Qchar_table_extra_slots, make_number (1)); |
df7492f9 KH |
8745 | DEFSYM (Qtranslation_table_id, "translation-table-id"); |
8746 | DEFSYM (Qtranslation_table_for_decode, "translation-table-for-decode"); | |
8747 | DEFSYM (Qtranslation_table_for_encode, "translation-table-for-encode"); | |
1397dc18 | 8748 | |
df7492f9 | 8749 | DEFSYM (Qvalid_codes, "valid-codes"); |
9ce27fde | 8750 | |
df7492f9 | 8751 | DEFSYM (Qemacs_mule, "emacs-mule"); |
d46c5b12 | 8752 | |
01378f49 KH |
8753 | DEFSYM (QCcategory, ":category"); |
8754 | ||
df7492f9 KH |
8755 | Vcoding_category_table |
8756 | = Fmake_vector (make_number (coding_category_max), Qnil); | |
8757 | staticpro (&Vcoding_category_table); | |
8758 | /* Followings are target of code detection. */ | |
8759 | ASET (Vcoding_category_table, coding_category_iso_7, | |
8760 | intern ("coding-category-iso-7")); | |
8761 | ASET (Vcoding_category_table, coding_category_iso_7_tight, | |
8762 | intern ("coding-category-iso-7-tight")); | |
8763 | ASET (Vcoding_category_table, coding_category_iso_8_1, | |
8764 | intern ("coding-category-iso-8-1")); | |
8765 | ASET (Vcoding_category_table, coding_category_iso_8_2, | |
8766 | intern ("coding-category-iso-8-2")); | |
8767 | ASET (Vcoding_category_table, coding_category_iso_7_else, | |
8768 | intern ("coding-category-iso-7-else")); | |
8769 | ASET (Vcoding_category_table, coding_category_iso_8_else, | |
8770 | intern ("coding-category-iso-8-else")); | |
8771 | ASET (Vcoding_category_table, coding_category_utf_8, | |
8772 | intern ("coding-category-utf-8")); | |
8773 | ASET (Vcoding_category_table, coding_category_utf_16_be, | |
8774 | intern ("coding-category-utf-16-be")); | |
ff563fce KH |
8775 | ASET (Vcoding_category_table, coding_category_utf_16_auto, |
8776 | intern ("coding-category-utf-16-auto")); | |
df7492f9 KH |
8777 | ASET (Vcoding_category_table, coding_category_utf_16_le, |
8778 | intern ("coding-category-utf-16-le")); | |
8779 | ASET (Vcoding_category_table, coding_category_utf_16_be_nosig, | |
8780 | intern ("coding-category-utf-16-be-nosig")); | |
8781 | ASET (Vcoding_category_table, coding_category_utf_16_le_nosig, | |
8782 | intern ("coding-category-utf-16-le-nosig")); | |
8783 | ASET (Vcoding_category_table, coding_category_charset, | |
8784 | intern ("coding-category-charset")); | |
8785 | ASET (Vcoding_category_table, coding_category_sjis, | |
8786 | intern ("coding-category-sjis")); | |
8787 | ASET (Vcoding_category_table, coding_category_big5, | |
8788 | intern ("coding-category-big5")); | |
8789 | ASET (Vcoding_category_table, coding_category_ccl, | |
8790 | intern ("coding-category-ccl")); | |
8791 | ASET (Vcoding_category_table, coding_category_emacs_mule, | |
8792 | intern ("coding-category-emacs-mule")); | |
8793 | /* Followings are NOT target of code detection. */ | |
8794 | ASET (Vcoding_category_table, coding_category_raw_text, | |
8795 | intern ("coding-category-raw-text")); | |
8796 | ASET (Vcoding_category_table, coding_category_undecided, | |
8797 | intern ("coding-category-undecided")); | |
ecf488bc | 8798 | |
4ed46869 KH |
8799 | defsubr (&Scoding_system_p); |
8800 | defsubr (&Sread_coding_system); | |
8801 | defsubr (&Sread_non_nil_coding_system); | |
8802 | defsubr (&Scheck_coding_system); | |
8803 | defsubr (&Sdetect_coding_region); | |
d46c5b12 | 8804 | defsubr (&Sdetect_coding_string); |
05e6f5dc | 8805 | defsubr (&Sfind_coding_systems_region_internal); |
068a9dbd | 8806 | defsubr (&Sunencodable_char_position); |
df7492f9 | 8807 | defsubr (&Scheck_coding_systems_region); |
4ed46869 KH |
8808 | defsubr (&Sdecode_coding_region); |
8809 | defsubr (&Sencode_coding_region); | |
8810 | defsubr (&Sdecode_coding_string); | |
8811 | defsubr (&Sencode_coding_string); | |
8812 | defsubr (&Sdecode_sjis_char); | |
8813 | defsubr (&Sencode_sjis_char); | |
8814 | defsubr (&Sdecode_big5_char); | |
8815 | defsubr (&Sencode_big5_char); | |
1ba9e4ab | 8816 | defsubr (&Sset_terminal_coding_system_internal); |
c4825358 | 8817 | defsubr (&Sset_safe_terminal_coding_system_internal); |
4ed46869 | 8818 | defsubr (&Sterminal_coding_system); |
1ba9e4ab | 8819 | defsubr (&Sset_keyboard_coding_system_internal); |
4ed46869 | 8820 | defsubr (&Skeyboard_coding_system); |
a5d301df | 8821 | defsubr (&Sfind_operation_coding_system); |
df7492f9 | 8822 | defsubr (&Sset_coding_system_priority); |
6b89e3aa | 8823 | defsubr (&Sdefine_coding_system_internal); |
df7492f9 KH |
8824 | defsubr (&Sdefine_coding_system_alias); |
8825 | defsubr (&Scoding_system_base); | |
8826 | defsubr (&Scoding_system_plist); | |
8827 | defsubr (&Scoding_system_aliases); | |
8828 | defsubr (&Scoding_system_eol_type); | |
8829 | defsubr (&Scoding_system_priority_list); | |
4ed46869 | 8830 | |
4608c386 | 8831 | DEFVAR_LISP ("coding-system-list", &Vcoding_system_list, |
48b0f3ae PJ |
8832 | doc: /* List of coding systems. |
8833 | ||
8834 | Do not alter the value of this variable manually. This variable should be | |
df7492f9 | 8835 | updated by the functions `define-coding-system' and |
48b0f3ae | 8836 | `define-coding-system-alias'. */); |
4608c386 KH |
8837 | Vcoding_system_list = Qnil; |
8838 | ||
8839 | DEFVAR_LISP ("coding-system-alist", &Vcoding_system_alist, | |
48b0f3ae PJ |
8840 | doc: /* Alist of coding system names. |
8841 | Each element is one element list of coding system name. | |
8842 | This variable is given to `completing-read' as TABLE argument. | |
8843 | ||
8844 | Do not alter the value of this variable manually. This variable should be | |
8845 | updated by the functions `make-coding-system' and | |
8846 | `define-coding-system-alias'. */); | |
4608c386 KH |
8847 | Vcoding_system_alist = Qnil; |
8848 | ||
4ed46869 | 8849 | DEFVAR_LISP ("coding-category-list", &Vcoding_category_list, |
48b0f3ae PJ |
8850 | doc: /* List of coding-categories (symbols) ordered by priority. |
8851 | ||
8852 | On detecting a coding system, Emacs tries code detection algorithms | |
8853 | associated with each coding-category one by one in this order. When | |
8854 | one algorithm agrees with a byte sequence of source text, the coding | |
8855 | system bound to the corresponding coding-category is selected. */); | |
4ed46869 KH |
8856 | { |
8857 | int i; | |
8858 | ||
8859 | Vcoding_category_list = Qnil; | |
df7492f9 | 8860 | for (i = coding_category_max - 1; i >= 0; i--) |
4ed46869 | 8861 | Vcoding_category_list |
d46c5b12 KH |
8862 | = Fcons (XVECTOR (Vcoding_category_table)->contents[i], |
8863 | Vcoding_category_list); | |
4ed46869 KH |
8864 | } |
8865 | ||
8866 | DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read, | |
48b0f3ae PJ |
8867 | doc: /* Specify the coding system for read operations. |
8868 | It is useful to bind this variable with `let', but do not set it globally. | |
8869 | If the value is a coding system, it is used for decoding on read operation. | |
8870 | If not, an appropriate element is used from one of the coding system alists: | |
8871 | There are three such tables, `file-coding-system-alist', | |
8872 | `process-coding-system-alist', and `network-coding-system-alist'. */); | |
4ed46869 KH |
8873 | Vcoding_system_for_read = Qnil; |
8874 | ||
8875 | DEFVAR_LISP ("coding-system-for-write", &Vcoding_system_for_write, | |
48b0f3ae PJ |
8876 | doc: /* Specify the coding system for write operations. |
8877 | Programs bind this variable with `let', but you should not set it globally. | |
8878 | If the value is a coding system, it is used for encoding of output, | |
8879 | when writing it to a file and when sending it to a file or subprocess. | |
8880 | ||
8881 | If this does not specify a coding system, an appropriate element | |
8882 | is used from one of the coding system alists: | |
8883 | There are three such tables, `file-coding-system-alist', | |
8884 | `process-coding-system-alist', and `network-coding-system-alist'. | |
8885 | For output to files, if the above procedure does not specify a coding system, | |
8886 | the value of `buffer-file-coding-system' is used. */); | |
4ed46869 KH |
8887 | Vcoding_system_for_write = Qnil; |
8888 | ||
8889 | DEFVAR_LISP ("last-coding-system-used", &Vlast_coding_system_used, | |
df7492f9 KH |
8890 | doc: /* |
8891 | Coding system used in the latest file or process I/O. */); | |
4ed46869 KH |
8892 | Vlast_coding_system_used = Qnil; |
8893 | ||
9ce27fde | 8894 | DEFVAR_BOOL ("inhibit-eol-conversion", &inhibit_eol_conversion, |
df7492f9 KH |
8895 | doc: /* |
8896 | *Non-nil means always inhibit code conversion of end-of-line format. | |
48b0f3ae PJ |
8897 | See info node `Coding Systems' and info node `Text and Binary' concerning |
8898 | such conversion. */); | |
9ce27fde KH |
8899 | inhibit_eol_conversion = 0; |
8900 | ||
ed29121d | 8901 | DEFVAR_BOOL ("inherit-process-coding-system", &inherit_process_coding_system, |
df7492f9 KH |
8902 | doc: /* |
8903 | Non-nil means process buffer inherits coding system of process output. | |
48b0f3ae PJ |
8904 | Bind it to t if the process output is to be treated as if it were a file |
8905 | read from some filesystem. */); | |
ed29121d EZ |
8906 | inherit_process_coding_system = 0; |
8907 | ||
02ba4723 | 8908 | DEFVAR_LISP ("file-coding-system-alist", &Vfile_coding_system_alist, |
df7492f9 KH |
8909 | doc: /* |
8910 | Alist to decide a coding system to use for a file I/O operation. | |
48b0f3ae PJ |
8911 | The format is ((PATTERN . VAL) ...), |
8912 | where PATTERN is a regular expression matching a file name, | |
8913 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
8914 | If VAL is a coding system, it is used for both decoding and encoding | |
8915 | the file contents. | |
8916 | If VAL is a cons of coding systems, the car part is used for decoding, | |
8917 | and the cdr part is used for encoding. | |
8918 | If VAL is a function symbol, the function must return a coding system | |
0192762c DL |
8919 | or a cons of coding systems which are used as above. The function gets |
8920 | the arguments with which `find-operation-coding-systems' was called. | |
48b0f3ae PJ |
8921 | |
8922 | See also the function `find-operation-coding-system' | |
8923 | and the variable `auto-coding-alist'. */); | |
02ba4723 KH |
8924 | Vfile_coding_system_alist = Qnil; |
8925 | ||
8926 | DEFVAR_LISP ("process-coding-system-alist", &Vprocess_coding_system_alist, | |
df7492f9 KH |
8927 | doc: /* |
8928 | Alist to decide a coding system to use for a process I/O operation. | |
48b0f3ae PJ |
8929 | The format is ((PATTERN . VAL) ...), |
8930 | where PATTERN is a regular expression matching a program name, | |
8931 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
8932 | If VAL is a coding system, it is used for both decoding what received | |
8933 | from the program and encoding what sent to the program. | |
8934 | If VAL is a cons of coding systems, the car part is used for decoding, | |
8935 | and the cdr part is used for encoding. | |
8936 | If VAL is a function symbol, the function must return a coding system | |
8937 | or a cons of coding systems which are used as above. | |
8938 | ||
8939 | See also the function `find-operation-coding-system'. */); | |
02ba4723 KH |
8940 | Vprocess_coding_system_alist = Qnil; |
8941 | ||
8942 | DEFVAR_LISP ("network-coding-system-alist", &Vnetwork_coding_system_alist, | |
df7492f9 KH |
8943 | doc: /* |
8944 | Alist to decide a coding system to use for a network I/O operation. | |
48b0f3ae PJ |
8945 | The format is ((PATTERN . VAL) ...), |
8946 | where PATTERN is a regular expression matching a network service name | |
8947 | or is a port number to connect to, | |
8948 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
8949 | If VAL is a coding system, it is used for both decoding what received | |
8950 | from the network stream and encoding what sent to the network stream. | |
8951 | If VAL is a cons of coding systems, the car part is used for decoding, | |
8952 | and the cdr part is used for encoding. | |
8953 | If VAL is a function symbol, the function must return a coding system | |
8954 | or a cons of coding systems which are used as above. | |
8955 | ||
8956 | See also the function `find-operation-coding-system'. */); | |
02ba4723 | 8957 | Vnetwork_coding_system_alist = Qnil; |
4ed46869 | 8958 | |
68c45bf0 | 8959 | DEFVAR_LISP ("locale-coding-system", &Vlocale_coding_system, |
75205970 RS |
8960 | doc: /* Coding system to use with system messages. |
8961 | Also used for decoding keyboard input on X Window system. */); | |
68c45bf0 PE |
8962 | Vlocale_coding_system = Qnil; |
8963 | ||
005f0d35 | 8964 | /* The eol mnemonics are reset in startup.el system-dependently. */ |
7722baf9 | 8965 | DEFVAR_LISP ("eol-mnemonic-unix", &eol_mnemonic_unix, |
df7492f9 KH |
8966 | doc: /* |
8967 | *String displayed in mode line for UNIX-like (LF) end-of-line format. */); | |
7722baf9 | 8968 | eol_mnemonic_unix = build_string (":"); |
4ed46869 | 8969 | |
7722baf9 | 8970 | DEFVAR_LISP ("eol-mnemonic-dos", &eol_mnemonic_dos, |
df7492f9 KH |
8971 | doc: /* |
8972 | *String displayed in mode line for DOS-like (CRLF) end-of-line format. */); | |
7722baf9 | 8973 | eol_mnemonic_dos = build_string ("\\"); |
4ed46869 | 8974 | |
7722baf9 | 8975 | DEFVAR_LISP ("eol-mnemonic-mac", &eol_mnemonic_mac, |
df7492f9 KH |
8976 | doc: /* |
8977 | *String displayed in mode line for MAC-like (CR) end-of-line format. */); | |
7722baf9 | 8978 | eol_mnemonic_mac = build_string ("/"); |
4ed46869 | 8979 | |
7722baf9 | 8980 | DEFVAR_LISP ("eol-mnemonic-undecided", &eol_mnemonic_undecided, |
df7492f9 KH |
8981 | doc: /* |
8982 | *String displayed in mode line when end-of-line format is not yet determined. */); | |
7722baf9 | 8983 | eol_mnemonic_undecided = build_string (":"); |
4ed46869 | 8984 | |
84fbb8a0 | 8985 | DEFVAR_LISP ("enable-character-translation", &Venable_character_translation, |
df7492f9 KH |
8986 | doc: /* |
8987 | *Non-nil enables character translation while encoding and decoding. */); | |
84fbb8a0 | 8988 | Venable_character_translation = Qt; |
bdd9fb48 | 8989 | |
f967223b | 8990 | DEFVAR_LISP ("standard-translation-table-for-decode", |
48b0f3ae PJ |
8991 | &Vstandard_translation_table_for_decode, |
8992 | doc: /* Table for translating characters while decoding. */); | |
f967223b | 8993 | Vstandard_translation_table_for_decode = Qnil; |
bdd9fb48 | 8994 | |
f967223b | 8995 | DEFVAR_LISP ("standard-translation-table-for-encode", |
48b0f3ae PJ |
8996 | &Vstandard_translation_table_for_encode, |
8997 | doc: /* Table for translating characters while encoding. */); | |
f967223b | 8998 | Vstandard_translation_table_for_encode = Qnil; |
4ed46869 | 8999 | |
df7492f9 | 9000 | DEFVAR_LISP ("charset-revision-table", &Vcharset_revision_table, |
48b0f3ae PJ |
9001 | doc: /* Alist of charsets vs revision numbers. |
9002 | While encoding, if a charset (car part of an element) is found, | |
df7492f9 KH |
9003 | designate it with the escape sequence identifying revision (cdr part |
9004 | of the element). */); | |
9005 | Vcharset_revision_table = Qnil; | |
02ba4723 KH |
9006 | |
9007 | DEFVAR_LISP ("default-process-coding-system", | |
9008 | &Vdefault_process_coding_system, | |
48b0f3ae PJ |
9009 | doc: /* Cons of coding systems used for process I/O by default. |
9010 | The car part is used for decoding a process output, | |
9011 | the cdr part is used for encoding a text to be sent to a process. */); | |
02ba4723 | 9012 | Vdefault_process_coding_system = Qnil; |
c4825358 | 9013 | |
3f003981 | 9014 | DEFVAR_LISP ("latin-extra-code-table", &Vlatin_extra_code_table, |
df7492f9 KH |
9015 | doc: /* |
9016 | Table of extra Latin codes in the range 128..159 (inclusive). | |
48b0f3ae PJ |
9017 | This is a vector of length 256. |
9018 | If Nth element is non-nil, the existence of code N in a file | |
9019 | \(or output of subprocess) doesn't prevent it to be detected as | |
9020 | a coding system of ISO 2022 variant which has a flag | |
9021 | `accept-latin-extra-code' t (e.g. iso-latin-1) on reading a file | |
9022 | or reading output of a subprocess. | |
9023 | Only 128th through 159th elements has a meaning. */); | |
3f003981 | 9024 | Vlatin_extra_code_table = Fmake_vector (make_number (256), Qnil); |
d46c5b12 KH |
9025 | |
9026 | DEFVAR_LISP ("select-safe-coding-system-function", | |
9027 | &Vselect_safe_coding_system_function, | |
df7492f9 KH |
9028 | doc: /* |
9029 | Function to call to select safe coding system for encoding a text. | |
48b0f3ae PJ |
9030 | |
9031 | If set, this function is called to force a user to select a proper | |
9032 | coding system which can encode the text in the case that a default | |
9033 | coding system used in each operation can't encode the text. | |
9034 | ||
9035 | The default value is `select-safe-coding-system' (which see). */); | |
d46c5b12 KH |
9036 | Vselect_safe_coding_system_function = Qnil; |
9037 | ||
5d5bf4d8 KH |
9038 | DEFVAR_BOOL ("coding-system-require-warning", |
9039 | &coding_system_require_warning, | |
9040 | doc: /* Internal use only. | |
6b89e3aa KH |
9041 | If non-nil, on writing a file, `select-safe-coding-system-function' is |
9042 | called even if `coding-system-for-write' is non-nil. The command | |
9043 | `universal-coding-system-argument' binds this variable to t temporarily. */); | |
5d5bf4d8 KH |
9044 | coding_system_require_warning = 0; |
9045 | ||
9046 | ||
22ab2303 | 9047 | DEFVAR_BOOL ("inhibit-iso-escape-detection", |
74383408 | 9048 | &inhibit_iso_escape_detection, |
df7492f9 KH |
9049 | doc: /* |
9050 | If non-nil, Emacs ignores ISO2022's escape sequence on code detection. | |
48b0f3ae PJ |
9051 | |
9052 | By default, on reading a file, Emacs tries to detect how the text is | |
9053 | encoded. This code detection is sensitive to escape sequences. If | |
9054 | the sequence is valid as ISO2022, the code is determined as one of | |
9055 | the ISO2022 encodings, and the file is decoded by the corresponding | |
9056 | coding system (e.g. `iso-2022-7bit'). | |
9057 | ||
9058 | However, there may be a case that you want to read escape sequences in | |
9059 | a file as is. In such a case, you can set this variable to non-nil. | |
9060 | Then, as the code detection ignores any escape sequences, no file is | |
9061 | detected as encoded in some ISO2022 encoding. The result is that all | |
9062 | escape sequences become visible in a buffer. | |
9063 | ||
9064 | The default value is nil, and it is strongly recommended not to change | |
9065 | it. That is because many Emacs Lisp source files that contain | |
9066 | non-ASCII characters are encoded by the coding system `iso-2022-7bit' | |
9067 | in Emacs's distribution, and they won't be decoded correctly on | |
9068 | reading if you suppress escape sequence detection. | |
9069 | ||
9070 | The other way to read escape sequences in a file without decoding is | |
9071 | to explicitly specify some coding system that doesn't use ISO2022's | |
9072 | escape sequence (e.g `latin-1') on reading by \\[universal-coding-system-argument]. */); | |
74383408 | 9073 | inhibit_iso_escape_detection = 0; |
002fdb44 DL |
9074 | |
9075 | DEFVAR_LISP ("translation-table-for-input", &Vtranslation_table_for_input, | |
15c8f9d1 DL |
9076 | doc: /* Char table for translating self-inserting characters. |
9077 | This is applied to the result of input methods, not their input. See also | |
9078 | `keyboard-translate-table'. */); | |
002fdb44 | 9079 | Vtranslation_table_for_input = Qnil; |
8f924df7 | 9080 | |
2c78b7e1 KH |
9081 | { |
9082 | Lisp_Object args[coding_arg_max]; | |
8f924df7 | 9083 | Lisp_Object plist[16]; |
2c78b7e1 KH |
9084 | int i; |
9085 | ||
9086 | for (i = 0; i < coding_arg_max; i++) | |
9087 | args[i] = Qnil; | |
9088 | ||
9089 | plist[0] = intern (":name"); | |
9090 | plist[1] = args[coding_arg_name] = Qno_conversion; | |
9091 | plist[2] = intern (":mnemonic"); | |
9092 | plist[3] = args[coding_arg_mnemonic] = make_number ('='); | |
9093 | plist[4] = intern (":coding-type"); | |
9094 | plist[5] = args[coding_arg_coding_type] = Qraw_text; | |
9095 | plist[6] = intern (":ascii-compatible-p"); | |
9096 | plist[7] = args[coding_arg_ascii_compatible_p] = Qt; | |
9097 | plist[8] = intern (":default-char"); | |
9098 | plist[9] = args[coding_arg_default_char] = make_number (0); | |
8f924df7 KH |
9099 | plist[10] = intern (":for-unibyte"); |
9100 | plist[11] = args[coding_arg_for_unibyte] = Qt; | |
9101 | plist[12] = intern (":docstring"); | |
9102 | plist[13] = build_string ("Do no conversion.\n\ | |
2c78b7e1 KH |
9103 | \n\ |
9104 | When you visit a file with this coding, the file is read into a\n\ | |
9105 | unibyte buffer as is, thus each byte of a file is treated as a\n\ | |
9106 | character."); | |
8f924df7 KH |
9107 | plist[14] = intern (":eol-type"); |
9108 | plist[15] = args[coding_arg_eol_type] = Qunix; | |
9109 | args[coding_arg_plist] = Flist (16, plist); | |
2c78b7e1 KH |
9110 | Fdefine_coding_system_internal (coding_arg_max, args); |
9111 | } | |
9112 | ||
9113 | setup_coding_system (Qno_conversion, &keyboard_coding); | |
9114 | setup_coding_system (Qno_conversion, &terminal_coding); | |
9115 | setup_coding_system (Qno_conversion, &safe_terminal_coding); | |
ff563fce KH |
9116 | |
9117 | { | |
9118 | int i; | |
9119 | ||
9120 | for (i = 0; i < coding_category_max; i++) | |
9121 | Fset (AREF (Vcoding_category_table, i), Qno_conversion); | |
9122 | } | |
4ed46869 KH |
9123 | } |
9124 | ||
68c45bf0 PE |
9125 | char * |
9126 | emacs_strerror (error_number) | |
9127 | int error_number; | |
9128 | { | |
9129 | char *str; | |
9130 | ||
ca9c0567 | 9131 | synchronize_system_messages_locale (); |
68c45bf0 PE |
9132 | str = strerror (error_number); |
9133 | ||
9134 | if (! NILP (Vlocale_coding_system)) | |
9135 | { | |
9136 | Lisp_Object dec = code_convert_string_norecord (build_string (str), | |
9137 | Vlocale_coding_system, | |
9138 | 0); | |
d5db4077 | 9139 | str = (char *) SDATA (dec); |
68c45bf0 PE |
9140 | } |
9141 | ||
9142 | return str; | |
9143 | } | |
9144 | ||
4ed46869 | 9145 | #endif /* emacs */ |