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4ed46869 | 1 | /* Coding system handler (conversion, detection, and etc). |
f1ce3dcf | 2 | Copyright (C) 1995,97,1998,2002,2003 Electrotechnical Laboratory, JAPAN. |
203cb916 | 3 | Licensed to the Free Software Foundation. |
58f99379 | 4 | Copyright (C) 2001,2002,2003 Free Software Foundation, Inc. |
4ed46869 | 5 | |
369314dc KH |
6 | This file is part of GNU Emacs. |
7 | ||
8 | GNU Emacs is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
4ed46869 | 12 | |
369314dc KH |
13 | GNU Emacs is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
4ed46869 | 17 | |
369314dc KH |
18 | You should have received a copy of the GNU General Public License |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
20 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
4ed46869 KH |
22 | |
23 | /*** TABLE OF CONTENTS *** | |
24 | ||
b73bfc1c | 25 | 0. General comments |
4ed46869 | 26 | 1. Preamble |
0ef69138 | 27 | 2. Emacs' internal format (emacs-mule) handlers |
4ed46869 KH |
28 | 3. ISO2022 handlers |
29 | 4. Shift-JIS and BIG5 handlers | |
1397dc18 KH |
30 | 5. CCL handlers |
31 | 6. End-of-line handlers | |
32 | 7. C library functions | |
33 | 8. Emacs Lisp library functions | |
34 | 9. Post-amble | |
4ed46869 KH |
35 | |
36 | */ | |
37 | ||
b73bfc1c KH |
38 | /*** 0. General comments ***/ |
39 | ||
40 | ||
cfb43547 | 41 | /*** GENERAL NOTE on CODING SYSTEMS *** |
4ed46869 | 42 | |
cfb43547 | 43 | A coding system is an encoding mechanism for one or more character |
4ed46869 KH |
44 | sets. Here's a list of coding systems which Emacs can handle. When |
45 | we say "decode", it means converting some other coding system to | |
cfb43547 | 46 | Emacs' internal format (emacs-mule), and when we say "encode", |
0ef69138 KH |
47 | it means converting the coding system emacs-mule to some other |
48 | coding system. | |
4ed46869 | 49 | |
0ef69138 | 50 | 0. Emacs' internal format (emacs-mule) |
4ed46869 | 51 | |
cfb43547 | 52 | Emacs itself holds a multi-lingual character in buffers and strings |
f4dee582 | 53 | in a special format. Details are described in section 2. |
4ed46869 KH |
54 | |
55 | 1. ISO2022 | |
56 | ||
57 | The most famous coding system for multiple character sets. X's | |
f4dee582 RS |
58 | Compound Text, various EUCs (Extended Unix Code), and coding |
59 | systems used in Internet communication such as ISO-2022-JP are | |
60 | all variants of ISO2022. Details are described in section 3. | |
4ed46869 KH |
61 | |
62 | 2. SJIS (or Shift-JIS or MS-Kanji-Code) | |
93dec019 | 63 | |
4ed46869 KH |
64 | A coding system to encode character sets: ASCII, JISX0201, and |
65 | JISX0208. Widely used for PC's in Japan. Details are described in | |
f4dee582 | 66 | section 4. |
4ed46869 KH |
67 | |
68 | 3. BIG5 | |
69 | ||
cfb43547 DL |
70 | A coding system to encode the character sets ASCII and Big5. Widely |
71 | used for Chinese (mainly in Taiwan and Hong Kong). Details are | |
f4dee582 RS |
72 | described in section 4. In this file, when we write "BIG5" |
73 | (all uppercase), we mean the coding system, and when we write | |
74 | "Big5" (capitalized), we mean the character set. | |
4ed46869 | 75 | |
27901516 KH |
76 | 4. Raw text |
77 | ||
cfb43547 DL |
78 | A coding system for text containing random 8-bit code. Emacs does |
79 | no code conversion on such text except for end-of-line format. | |
27901516 KH |
80 | |
81 | 5. Other | |
4ed46869 | 82 | |
cfb43547 DL |
83 | If a user wants to read/write text encoded in a coding system not |
84 | listed above, he can supply a decoder and an encoder for it as CCL | |
4ed46869 KH |
85 | (Code Conversion Language) programs. Emacs executes the CCL program |
86 | while reading/writing. | |
87 | ||
d46c5b12 KH |
88 | Emacs represents a coding system by a Lisp symbol that has a property |
89 | `coding-system'. But, before actually using the coding system, the | |
4ed46869 | 90 | information about it is set in a structure of type `struct |
f4dee582 | 91 | coding_system' for rapid processing. See section 6 for more details. |
4ed46869 KH |
92 | |
93 | */ | |
94 | ||
95 | /*** GENERAL NOTES on END-OF-LINE FORMAT *** | |
96 | ||
cfb43547 DL |
97 | How end-of-line of text is encoded depends on the operating system. |
98 | For instance, Unix's format is just one byte of `line-feed' code, | |
f4dee582 | 99 | whereas DOS's format is two-byte sequence of `carriage-return' and |
d46c5b12 KH |
100 | `line-feed' codes. MacOS's format is usually one byte of |
101 | `carriage-return'. | |
4ed46869 | 102 | |
cfb43547 DL |
103 | Since text character encoding and end-of-line encoding are |
104 | independent, any coding system described above can have any | |
105 | end-of-line format. So Emacs has information about end-of-line | |
106 | format in each coding-system. See section 6 for more details. | |
4ed46869 KH |
107 | |
108 | */ | |
109 | ||
110 | /*** GENERAL NOTES on `detect_coding_XXX ()' functions *** | |
111 | ||
112 | These functions check if a text between SRC and SRC_END is encoded | |
113 | in the coding system category XXX. Each returns an integer value in | |
cfb43547 | 114 | which appropriate flag bits for the category XXX are set. The flag |
4ed46869 | 115 | bits are defined in macros CODING_CATEGORY_MASK_XXX. Below is the |
cfb43547 | 116 | template for these functions. If MULTIBYTEP is nonzero, 8-bit codes |
0a28aafb | 117 | of the range 0x80..0x9F are in multibyte form. */ |
4ed46869 KH |
118 | #if 0 |
119 | int | |
0a28aafb | 120 | detect_coding_emacs_mule (src, src_end, multibytep) |
4ed46869 | 121 | unsigned char *src, *src_end; |
0a28aafb | 122 | int multibytep; |
4ed46869 KH |
123 | { |
124 | ... | |
125 | } | |
126 | #endif | |
127 | ||
128 | /*** GENERAL NOTES on `decode_coding_XXX ()' functions *** | |
129 | ||
b73bfc1c KH |
130 | These functions decode SRC_BYTES length of unibyte text at SOURCE |
131 | encoded in CODING to Emacs' internal format. The resulting | |
132 | multibyte text goes to a place pointed to by DESTINATION, the length | |
133 | of which should not exceed DST_BYTES. | |
d46c5b12 | 134 | |
cfb43547 DL |
135 | These functions set the information about original and decoded texts |
136 | in the members `produced', `produced_char', `consumed', and | |
137 | `consumed_char' of the structure *CODING. They also set the member | |
138 | `result' to one of CODING_FINISH_XXX indicating how the decoding | |
139 | finished. | |
d46c5b12 | 140 | |
cfb43547 | 141 | DST_BYTES zero means that the source area and destination area are |
d46c5b12 | 142 | overlapped, which means that we can produce a decoded text until it |
cfb43547 | 143 | reaches the head of the not-yet-decoded source text. |
d46c5b12 | 144 | |
cfb43547 | 145 | Below is a template for these functions. */ |
4ed46869 | 146 | #if 0 |
b73bfc1c | 147 | static void |
d46c5b12 | 148 | decode_coding_XXX (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
149 | struct coding_system *coding; |
150 | unsigned char *source, *destination; | |
151 | int src_bytes, dst_bytes; | |
4ed46869 KH |
152 | { |
153 | ... | |
154 | } | |
155 | #endif | |
156 | ||
157 | /*** GENERAL NOTES on `encode_coding_XXX ()' functions *** | |
158 | ||
cfb43547 | 159 | These functions encode SRC_BYTES length text at SOURCE from Emacs' |
b73bfc1c KH |
160 | internal multibyte format to CODING. The resulting unibyte text |
161 | goes to a place pointed to by DESTINATION, the length of which | |
162 | should not exceed DST_BYTES. | |
d46c5b12 | 163 | |
cfb43547 DL |
164 | These functions set the information about original and encoded texts |
165 | in the members `produced', `produced_char', `consumed', and | |
166 | `consumed_char' of the structure *CODING. They also set the member | |
167 | `result' to one of CODING_FINISH_XXX indicating how the encoding | |
168 | finished. | |
d46c5b12 | 169 | |
cfb43547 DL |
170 | DST_BYTES zero means that the source area and destination area are |
171 | overlapped, which means that we can produce encoded text until it | |
172 | reaches at the head of the not-yet-encoded source text. | |
d46c5b12 | 173 | |
cfb43547 | 174 | Below is a template for these functions. */ |
4ed46869 | 175 | #if 0 |
b73bfc1c | 176 | static void |
d46c5b12 | 177 | encode_coding_XXX (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
178 | struct coding_system *coding; |
179 | unsigned char *source, *destination; | |
180 | int src_bytes, dst_bytes; | |
4ed46869 KH |
181 | { |
182 | ... | |
183 | } | |
184 | #endif | |
185 | ||
186 | /*** COMMONLY USED MACROS ***/ | |
187 | ||
b73bfc1c KH |
188 | /* The following two macros ONE_MORE_BYTE and TWO_MORE_BYTES safely |
189 | get one, two, and three bytes from the source text respectively. | |
190 | If there are not enough bytes in the source, they jump to | |
191 | `label_end_of_loop'. The caller should set variables `coding', | |
192 | `src' and `src_end' to appropriate pointer in advance. These | |
193 | macros are called from decoding routines `decode_coding_XXX', thus | |
194 | it is assumed that the source text is unibyte. */ | |
4ed46869 | 195 | |
b73bfc1c KH |
196 | #define ONE_MORE_BYTE(c1) \ |
197 | do { \ | |
198 | if (src >= src_end) \ | |
199 | { \ | |
200 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
201 | goto label_end_of_loop; \ | |
202 | } \ | |
203 | c1 = *src++; \ | |
4ed46869 KH |
204 | } while (0) |
205 | ||
b73bfc1c KH |
206 | #define TWO_MORE_BYTES(c1, c2) \ |
207 | do { \ | |
208 | if (src + 1 >= src_end) \ | |
209 | { \ | |
210 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
211 | goto label_end_of_loop; \ | |
212 | } \ | |
213 | c1 = *src++; \ | |
214 | c2 = *src++; \ | |
4ed46869 KH |
215 | } while (0) |
216 | ||
4ed46869 | 217 | |
0a28aafb KH |
218 | /* Like ONE_MORE_BYTE, but 8-bit bytes of data at SRC are in multibyte |
219 | form if MULTIBYTEP is nonzero. */ | |
220 | ||
221 | #define ONE_MORE_BYTE_CHECK_MULTIBYTE(c1, multibytep) \ | |
222 | do { \ | |
223 | if (src >= src_end) \ | |
224 | { \ | |
225 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
226 | goto label_end_of_loop; \ | |
227 | } \ | |
228 | c1 = *src++; \ | |
229 | if (multibytep && c1 == LEADING_CODE_8_BIT_CONTROL) \ | |
230 | c1 = *src++ - 0x20; \ | |
231 | } while (0) | |
232 | ||
b73bfc1c KH |
233 | /* Set C to the next character at the source text pointed by `src'. |
234 | If there are not enough characters in the source, jump to | |
235 | `label_end_of_loop'. The caller should set variables `coding' | |
236 | `src', `src_end', and `translation_table' to appropriate pointers | |
237 | in advance. This macro is used in encoding routines | |
238 | `encode_coding_XXX', thus it assumes that the source text is in | |
239 | multibyte form except for 8-bit characters. 8-bit characters are | |
240 | in multibyte form if coding->src_multibyte is nonzero, else they | |
241 | are represented by a single byte. */ | |
4ed46869 | 242 | |
b73bfc1c KH |
243 | #define ONE_MORE_CHAR(c) \ |
244 | do { \ | |
245 | int len = src_end - src; \ | |
246 | int bytes; \ | |
247 | if (len <= 0) \ | |
248 | { \ | |
249 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
250 | goto label_end_of_loop; \ | |
251 | } \ | |
252 | if (coding->src_multibyte \ | |
253 | || UNIBYTE_STR_AS_MULTIBYTE_P (src, len, bytes)) \ | |
254 | c = STRING_CHAR_AND_LENGTH (src, len, bytes); \ | |
255 | else \ | |
256 | c = *src, bytes = 1; \ | |
257 | if (!NILP (translation_table)) \ | |
39658efc | 258 | c = translate_char (translation_table, c, -1, 0, 0); \ |
b73bfc1c | 259 | src += bytes; \ |
4ed46869 KH |
260 | } while (0) |
261 | ||
4ed46869 | 262 | |
8ca3766a | 263 | /* Produce a multibyte form of character C to `dst'. Jump to |
b73bfc1c KH |
264 | `label_end_of_loop' if there's not enough space at `dst'. |
265 | ||
cfb43547 | 266 | If we are now in the middle of a composition sequence, the decoded |
b73bfc1c KH |
267 | character may be ALTCHAR (for the current composition). In that |
268 | case, the character goes to coding->cmp_data->data instead of | |
269 | `dst'. | |
270 | ||
271 | This macro is used in decoding routines. */ | |
272 | ||
273 | #define EMIT_CHAR(c) \ | |
4ed46869 | 274 | do { \ |
b73bfc1c KH |
275 | if (! COMPOSING_P (coding) \ |
276 | || coding->composing == COMPOSITION_RELATIVE \ | |
277 | || coding->composing == COMPOSITION_WITH_RULE) \ | |
278 | { \ | |
279 | int bytes = CHAR_BYTES (c); \ | |
280 | if ((dst + bytes) > (dst_bytes ? dst_end : src)) \ | |
281 | { \ | |
282 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
283 | goto label_end_of_loop; \ | |
284 | } \ | |
285 | dst += CHAR_STRING (c, dst); \ | |
286 | coding->produced_char++; \ | |
287 | } \ | |
ec6d2bb8 | 288 | \ |
b73bfc1c KH |
289 | if (COMPOSING_P (coding) \ |
290 | && coding->composing != COMPOSITION_RELATIVE) \ | |
291 | { \ | |
292 | CODING_ADD_COMPOSITION_COMPONENT (coding, c); \ | |
293 | coding->composition_rule_follows \ | |
294 | = coding->composing != COMPOSITION_WITH_ALTCHARS; \ | |
295 | } \ | |
4ed46869 KH |
296 | } while (0) |
297 | ||
4ed46869 | 298 | |
b73bfc1c KH |
299 | #define EMIT_ONE_BYTE(c) \ |
300 | do { \ | |
301 | if (dst >= (dst_bytes ? dst_end : src)) \ | |
302 | { \ | |
303 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
304 | goto label_end_of_loop; \ | |
305 | } \ | |
306 | *dst++ = c; \ | |
307 | } while (0) | |
308 | ||
309 | #define EMIT_TWO_BYTES(c1, c2) \ | |
310 | do { \ | |
311 | if (dst + 2 > (dst_bytes ? dst_end : src)) \ | |
312 | { \ | |
313 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
314 | goto label_end_of_loop; \ | |
315 | } \ | |
316 | *dst++ = c1, *dst++ = c2; \ | |
317 | } while (0) | |
318 | ||
319 | #define EMIT_BYTES(from, to) \ | |
320 | do { \ | |
321 | if (dst + (to - from) > (dst_bytes ? dst_end : src)) \ | |
322 | { \ | |
323 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
324 | goto label_end_of_loop; \ | |
325 | } \ | |
326 | while (from < to) \ | |
327 | *dst++ = *from++; \ | |
4ed46869 KH |
328 | } while (0) |
329 | ||
330 | \f | |
331 | /*** 1. Preamble ***/ | |
332 | ||
68c45bf0 PE |
333 | #ifdef emacs |
334 | #include <config.h> | |
335 | #endif | |
336 | ||
4ed46869 KH |
337 | #include <stdio.h> |
338 | ||
339 | #ifdef emacs | |
340 | ||
4ed46869 KH |
341 | #include "lisp.h" |
342 | #include "buffer.h" | |
343 | #include "charset.h" | |
ec6d2bb8 | 344 | #include "composite.h" |
4ed46869 KH |
345 | #include "ccl.h" |
346 | #include "coding.h" | |
347 | #include "window.h" | |
66638433 | 348 | #include "intervals.h" |
4ed46869 KH |
349 | |
350 | #else /* not emacs */ | |
351 | ||
352 | #include "mulelib.h" | |
353 | ||
354 | #endif /* not emacs */ | |
355 | ||
356 | Lisp_Object Qcoding_system, Qeol_type; | |
357 | Lisp_Object Qbuffer_file_coding_system; | |
358 | Lisp_Object Qpost_read_conversion, Qpre_write_conversion; | |
27901516 | 359 | Lisp_Object Qno_conversion, Qundecided; |
bb0115a2 | 360 | Lisp_Object Qcoding_system_history; |
05e6f5dc | 361 | Lisp_Object Qsafe_chars; |
1397dc18 | 362 | Lisp_Object Qvalid_codes; |
4ed46869 KH |
363 | |
364 | extern Lisp_Object Qinsert_file_contents, Qwrite_region; | |
365 | Lisp_Object Qcall_process, Qcall_process_region, Qprocess_argument; | |
366 | Lisp_Object Qstart_process, Qopen_network_stream; | |
367 | Lisp_Object Qtarget_idx; | |
368 | ||
d46c5b12 KH |
369 | Lisp_Object Vselect_safe_coding_system_function; |
370 | ||
5d5bf4d8 KH |
371 | int coding_system_require_warning; |
372 | ||
7722baf9 EZ |
373 | /* Mnemonic string for each format of end-of-line. */ |
374 | Lisp_Object eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac; | |
375 | /* Mnemonic string to indicate format of end-of-line is not yet | |
4ed46869 | 376 | decided. */ |
7722baf9 | 377 | Lisp_Object eol_mnemonic_undecided; |
4ed46869 | 378 | |
9ce27fde KH |
379 | /* Format of end-of-line decided by system. This is CODING_EOL_LF on |
380 | Unix, CODING_EOL_CRLF on DOS/Windows, and CODING_EOL_CR on Mac. */ | |
381 | int system_eol_type; | |
382 | ||
4ed46869 KH |
383 | #ifdef emacs |
384 | ||
6b89e3aa KH |
385 | /* Information about which coding system is safe for which chars. |
386 | The value has the form (GENERIC-LIST . NON-GENERIC-ALIST). | |
387 | ||
388 | GENERIC-LIST is a list of generic coding systems which can encode | |
389 | any characters. | |
390 | ||
391 | NON-GENERIC-ALIST is an alist of non generic coding systems vs the | |
392 | corresponding char table that contains safe chars. */ | |
393 | Lisp_Object Vcoding_system_safe_chars; | |
394 | ||
4608c386 KH |
395 | Lisp_Object Vcoding_system_list, Vcoding_system_alist; |
396 | ||
397 | Lisp_Object Qcoding_system_p, Qcoding_system_error; | |
4ed46869 | 398 | |
d46c5b12 KH |
399 | /* Coding system emacs-mule and raw-text are for converting only |
400 | end-of-line format. */ | |
401 | Lisp_Object Qemacs_mule, Qraw_text; | |
9ce27fde | 402 | |
ecf488bc DL |
403 | Lisp_Object Qutf_8; |
404 | ||
4ed46869 KH |
405 | /* Coding-systems are handed between Emacs Lisp programs and C internal |
406 | routines by the following three variables. */ | |
407 | /* Coding-system for reading files and receiving data from process. */ | |
408 | Lisp_Object Vcoding_system_for_read; | |
409 | /* Coding-system for writing files and sending data to process. */ | |
410 | Lisp_Object Vcoding_system_for_write; | |
411 | /* Coding-system actually used in the latest I/O. */ | |
412 | Lisp_Object Vlast_coding_system_used; | |
413 | ||
c4825358 | 414 | /* A vector of length 256 which contains information about special |
94487c4e | 415 | Latin codes (especially for dealing with Microsoft codes). */ |
3f003981 | 416 | Lisp_Object Vlatin_extra_code_table; |
c4825358 | 417 | |
9ce27fde KH |
418 | /* Flag to inhibit code conversion of end-of-line format. */ |
419 | int inhibit_eol_conversion; | |
420 | ||
74383408 KH |
421 | /* Flag to inhibit ISO2022 escape sequence detection. */ |
422 | int inhibit_iso_escape_detection; | |
423 | ||
ed29121d EZ |
424 | /* Flag to make buffer-file-coding-system inherit from process-coding. */ |
425 | int inherit_process_coding_system; | |
426 | ||
c4825358 | 427 | /* Coding system to be used to encode text for terminal display. */ |
4ed46869 KH |
428 | struct coding_system terminal_coding; |
429 | ||
c4825358 KH |
430 | /* Coding system to be used to encode text for terminal display when |
431 | terminal coding system is nil. */ | |
432 | struct coding_system safe_terminal_coding; | |
433 | ||
434 | /* Coding system of what is sent from terminal keyboard. */ | |
4ed46869 KH |
435 | struct coding_system keyboard_coding; |
436 | ||
6bc51348 KH |
437 | /* Default coding system to be used to write a file. */ |
438 | struct coding_system default_buffer_file_coding; | |
439 | ||
02ba4723 KH |
440 | Lisp_Object Vfile_coding_system_alist; |
441 | Lisp_Object Vprocess_coding_system_alist; | |
442 | Lisp_Object Vnetwork_coding_system_alist; | |
4ed46869 | 443 | |
68c45bf0 PE |
444 | Lisp_Object Vlocale_coding_system; |
445 | ||
4ed46869 KH |
446 | #endif /* emacs */ |
447 | ||
d46c5b12 | 448 | Lisp_Object Qcoding_category, Qcoding_category_index; |
4ed46869 KH |
449 | |
450 | /* List of symbols `coding-category-xxx' ordered by priority. */ | |
451 | Lisp_Object Vcoding_category_list; | |
452 | ||
d46c5b12 KH |
453 | /* Table of coding categories (Lisp symbols). */ |
454 | Lisp_Object Vcoding_category_table; | |
4ed46869 KH |
455 | |
456 | /* Table of names of symbol for each coding-category. */ | |
457 | char *coding_category_name[CODING_CATEGORY_IDX_MAX] = { | |
0ef69138 | 458 | "coding-category-emacs-mule", |
4ed46869 KH |
459 | "coding-category-sjis", |
460 | "coding-category-iso-7", | |
d46c5b12 | 461 | "coding-category-iso-7-tight", |
4ed46869 KH |
462 | "coding-category-iso-8-1", |
463 | "coding-category-iso-8-2", | |
7717c392 KH |
464 | "coding-category-iso-7-else", |
465 | "coding-category-iso-8-else", | |
89fa8b36 | 466 | "coding-category-ccl", |
4ed46869 | 467 | "coding-category-big5", |
fa42c37f KH |
468 | "coding-category-utf-8", |
469 | "coding-category-utf-16-be", | |
470 | "coding-category-utf-16-le", | |
27901516 | 471 | "coding-category-raw-text", |
89fa8b36 | 472 | "coding-category-binary" |
4ed46869 KH |
473 | }; |
474 | ||
66cfb530 | 475 | /* Table of pointers to coding systems corresponding to each coding |
d46c5b12 KH |
476 | categories. */ |
477 | struct coding_system *coding_system_table[CODING_CATEGORY_IDX_MAX]; | |
478 | ||
66cfb530 | 479 | /* Table of coding category masks. Nth element is a mask for a coding |
8ca3766a | 480 | category of which priority is Nth. */ |
66cfb530 KH |
481 | static |
482 | int coding_priorities[CODING_CATEGORY_IDX_MAX]; | |
483 | ||
f967223b KH |
484 | /* Flag to tell if we look up translation table on character code |
485 | conversion. */ | |
84fbb8a0 | 486 | Lisp_Object Venable_character_translation; |
f967223b KH |
487 | /* Standard translation table to look up on decoding (reading). */ |
488 | Lisp_Object Vstandard_translation_table_for_decode; | |
489 | /* Standard translation table to look up on encoding (writing). */ | |
490 | Lisp_Object Vstandard_translation_table_for_encode; | |
84fbb8a0 | 491 | |
f967223b KH |
492 | Lisp_Object Qtranslation_table; |
493 | Lisp_Object Qtranslation_table_id; | |
494 | Lisp_Object Qtranslation_table_for_decode; | |
495 | Lisp_Object Qtranslation_table_for_encode; | |
4ed46869 KH |
496 | |
497 | /* Alist of charsets vs revision number. */ | |
498 | Lisp_Object Vcharset_revision_alist; | |
499 | ||
02ba4723 KH |
500 | /* Default coding systems used for process I/O. */ |
501 | Lisp_Object Vdefault_process_coding_system; | |
502 | ||
002fdb44 DL |
503 | /* Char table for translating Quail and self-inserting input. */ |
504 | Lisp_Object Vtranslation_table_for_input; | |
505 | ||
b843d1ae KH |
506 | /* Global flag to tell that we can't call post-read-conversion and |
507 | pre-write-conversion functions. Usually the value is zero, but it | |
508 | is set to 1 temporarily while such functions are running. This is | |
509 | to avoid infinite recursive call. */ | |
510 | static int inhibit_pre_post_conversion; | |
511 | ||
05e6f5dc KH |
512 | Lisp_Object Qchar_coding_system; |
513 | ||
6b89e3aa KH |
514 | /* Return `safe-chars' property of CODING_SYSTEM (symbol). Don't check |
515 | its validity. */ | |
05e6f5dc KH |
516 | |
517 | Lisp_Object | |
6b89e3aa KH |
518 | coding_safe_chars (coding_system) |
519 | Lisp_Object coding_system; | |
05e6f5dc KH |
520 | { |
521 | Lisp_Object coding_spec, plist, safe_chars; | |
93dec019 | 522 | |
6b89e3aa | 523 | coding_spec = Fget (coding_system, Qcoding_system); |
05e6f5dc KH |
524 | plist = XVECTOR (coding_spec)->contents[3]; |
525 | safe_chars = Fplist_get (XVECTOR (coding_spec)->contents[3], Qsafe_chars); | |
526 | return (CHAR_TABLE_P (safe_chars) ? safe_chars : Qt); | |
527 | } | |
528 | ||
529 | #define CODING_SAFE_CHAR_P(safe_chars, c) \ | |
530 | (EQ (safe_chars, Qt) || !NILP (CHAR_TABLE_REF (safe_chars, c))) | |
531 | ||
4ed46869 | 532 | \f |
0ef69138 | 533 | /*** 2. Emacs internal format (emacs-mule) handlers ***/ |
4ed46869 | 534 | |
aa72b389 KH |
535 | /* Emacs' internal format for representation of multiple character |
536 | sets is a kind of multi-byte encoding, i.e. characters are | |
537 | represented by variable-length sequences of one-byte codes. | |
b73bfc1c KH |
538 | |
539 | ASCII characters and control characters (e.g. `tab', `newline') are | |
540 | represented by one-byte sequences which are their ASCII codes, in | |
541 | the range 0x00 through 0x7F. | |
542 | ||
543 | 8-bit characters of the range 0x80..0x9F are represented by | |
544 | two-byte sequences of LEADING_CODE_8_BIT_CONTROL and (their 8-bit | |
545 | code + 0x20). | |
546 | ||
547 | 8-bit characters of the range 0xA0..0xFF are represented by | |
548 | one-byte sequences which are their 8-bit code. | |
549 | ||
550 | The other characters are represented by a sequence of `base | |
551 | leading-code', optional `extended leading-code', and one or two | |
552 | `position-code's. The length of the sequence is determined by the | |
aa72b389 | 553 | base leading-code. Leading-code takes the range 0x81 through 0x9D, |
b73bfc1c KH |
554 | whereas extended leading-code and position-code take the range 0xA0 |
555 | through 0xFF. See `charset.h' for more details about leading-code | |
556 | and position-code. | |
f4dee582 | 557 | |
4ed46869 | 558 | --- CODE RANGE of Emacs' internal format --- |
b73bfc1c KH |
559 | character set range |
560 | ------------- ----- | |
561 | ascii 0x00..0x7F | |
562 | eight-bit-control LEADING_CODE_8_BIT_CONTROL + 0xA0..0xBF | |
563 | eight-bit-graphic 0xA0..0xBF | |
aa72b389 | 564 | ELSE 0x81..0x9D + [0xA0..0xFF]+ |
4ed46869 KH |
565 | --------------------------------------------- |
566 | ||
aa72b389 KH |
567 | As this is the internal character representation, the format is |
568 | usually not used externally (i.e. in a file or in a data sent to a | |
569 | process). But, it is possible to have a text externally in this | |
570 | format (i.e. by encoding by the coding system `emacs-mule'). | |
571 | ||
572 | In that case, a sequence of one-byte codes has a slightly different | |
573 | form. | |
574 | ||
ae5145c2 | 575 | Firstly, all characters in eight-bit-control are represented by |
aa72b389 KH |
576 | one-byte sequences which are their 8-bit code. |
577 | ||
578 | Next, character composition data are represented by the byte | |
579 | sequence of the form: 0x80 METHOD BYTES CHARS COMPONENT ..., | |
580 | where, | |
581 | METHOD is 0xF0 plus one of composition method (enum | |
582 | composition_method), | |
583 | ||
ae5145c2 | 584 | BYTES is 0xA0 plus the byte length of these composition data, |
aa72b389 | 585 | |
ae5145c2 | 586 | CHARS is 0xA0 plus the number of characters composed by these |
aa72b389 KH |
587 | data, |
588 | ||
8ca3766a | 589 | COMPONENTs are characters of multibyte form or composition |
aa72b389 KH |
590 | rules encoded by two-byte of ASCII codes. |
591 | ||
592 | In addition, for backward compatibility, the following formats are | |
593 | also recognized as composition data on decoding. | |
594 | ||
595 | 0x80 MSEQ ... | |
596 | 0x80 0xFF MSEQ RULE MSEQ RULE ... MSEQ | |
597 | ||
598 | Here, | |
599 | MSEQ is a multibyte form but in these special format: | |
600 | ASCII: 0xA0 ASCII_CODE+0x80, | |
601 | other: LEADING_CODE+0x20 FOLLOWING-BYTE ..., | |
602 | RULE is a one byte code of the range 0xA0..0xF0 that | |
603 | represents a composition rule. | |
4ed46869 KH |
604 | */ |
605 | ||
606 | enum emacs_code_class_type emacs_code_class[256]; | |
607 | ||
4ed46869 KH |
608 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
609 | Check if a text is encoded in Emacs' internal format. If it is, | |
d46c5b12 | 610 | return CODING_CATEGORY_MASK_EMACS_MULE, else return 0. */ |
4ed46869 | 611 | |
0a28aafb KH |
612 | static int |
613 | detect_coding_emacs_mule (src, src_end, multibytep) | |
b73bfc1c | 614 | unsigned char *src, *src_end; |
0a28aafb | 615 | int multibytep; |
4ed46869 KH |
616 | { |
617 | unsigned char c; | |
618 | int composing = 0; | |
b73bfc1c KH |
619 | /* Dummy for ONE_MORE_BYTE. */ |
620 | struct coding_system dummy_coding; | |
621 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 622 | |
b73bfc1c | 623 | while (1) |
4ed46869 | 624 | { |
0a28aafb | 625 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
4ed46869 KH |
626 | |
627 | if (composing) | |
628 | { | |
629 | if (c < 0xA0) | |
630 | composing = 0; | |
b73bfc1c KH |
631 | else if (c == 0xA0) |
632 | { | |
0a28aafb | 633 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
b73bfc1c KH |
634 | c &= 0x7F; |
635 | } | |
4ed46869 KH |
636 | else |
637 | c -= 0x20; | |
638 | } | |
639 | ||
b73bfc1c | 640 | if (c < 0x20) |
4ed46869 | 641 | { |
4ed46869 KH |
642 | if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) |
643 | return 0; | |
b73bfc1c KH |
644 | } |
645 | else if (c >= 0x80 && c < 0xA0) | |
646 | { | |
647 | if (c == 0x80) | |
648 | /* Old leading code for a composite character. */ | |
649 | composing = 1; | |
650 | else | |
651 | { | |
652 | unsigned char *src_base = src - 1; | |
653 | int bytes; | |
4ed46869 | 654 | |
b73bfc1c KH |
655 | if (!UNIBYTE_STR_AS_MULTIBYTE_P (src_base, src_end - src_base, |
656 | bytes)) | |
657 | return 0; | |
658 | src = src_base + bytes; | |
659 | } | |
660 | } | |
661 | } | |
662 | label_end_of_loop: | |
663 | return CODING_CATEGORY_MASK_EMACS_MULE; | |
664 | } | |
4ed46869 | 665 | |
4ed46869 | 666 | |
aa72b389 KH |
667 | /* Record the starting position START and METHOD of one composition. */ |
668 | ||
669 | #define CODING_ADD_COMPOSITION_START(coding, start, method) \ | |
670 | do { \ | |
671 | struct composition_data *cmp_data = coding->cmp_data; \ | |
672 | int *data = cmp_data->data + cmp_data->used; \ | |
673 | coding->cmp_data_start = cmp_data->used; \ | |
674 | data[0] = -1; \ | |
675 | data[1] = cmp_data->char_offset + start; \ | |
676 | data[3] = (int) method; \ | |
677 | cmp_data->used += 4; \ | |
678 | } while (0) | |
679 | ||
680 | /* Record the ending position END of the current composition. */ | |
681 | ||
682 | #define CODING_ADD_COMPOSITION_END(coding, end) \ | |
683 | do { \ | |
684 | struct composition_data *cmp_data = coding->cmp_data; \ | |
685 | int *data = cmp_data->data + coding->cmp_data_start; \ | |
686 | data[0] = cmp_data->used - coding->cmp_data_start; \ | |
687 | data[2] = cmp_data->char_offset + end; \ | |
688 | } while (0) | |
689 | ||
690 | /* Record one COMPONENT (alternate character or composition rule). */ | |
691 | ||
b6871cc7 KH |
692 | #define CODING_ADD_COMPOSITION_COMPONENT(coding, component) \ |
693 | do { \ | |
694 | coding->cmp_data->data[coding->cmp_data->used++] = component; \ | |
695 | if (coding->cmp_data->used - coding->cmp_data_start \ | |
696 | == COMPOSITION_DATA_MAX_BUNCH_LENGTH) \ | |
697 | { \ | |
698 | CODING_ADD_COMPOSITION_END (coding, coding->produced_char); \ | |
699 | coding->composing = COMPOSITION_NO; \ | |
700 | } \ | |
701 | } while (0) | |
aa72b389 KH |
702 | |
703 | ||
704 | /* Get one byte from a data pointed by SRC and increment SRC. If SRC | |
8ca3766a | 705 | is not less than SRC_END, return -1 without incrementing Src. */ |
aa72b389 KH |
706 | |
707 | #define SAFE_ONE_MORE_BYTE() (src >= src_end ? -1 : *src++) | |
708 | ||
709 | ||
710 | /* Decode a character represented as a component of composition | |
711 | sequence of Emacs 20 style at SRC. Set C to that character, store | |
712 | its multibyte form sequence at P, and set P to the end of that | |
713 | sequence. If no valid character is found, set C to -1. */ | |
714 | ||
715 | #define DECODE_EMACS_MULE_COMPOSITION_CHAR(c, p) \ | |
716 | do { \ | |
717 | int bytes; \ | |
fd3ae0b9 | 718 | \ |
aa72b389 KH |
719 | c = SAFE_ONE_MORE_BYTE (); \ |
720 | if (c < 0) \ | |
721 | break; \ | |
722 | if (CHAR_HEAD_P (c)) \ | |
723 | c = -1; \ | |
724 | else if (c == 0xA0) \ | |
725 | { \ | |
726 | c = SAFE_ONE_MORE_BYTE (); \ | |
727 | if (c < 0xA0) \ | |
728 | c = -1; \ | |
729 | else \ | |
730 | { \ | |
731 | c -= 0xA0; \ | |
732 | *p++ = c; \ | |
733 | } \ | |
734 | } \ | |
735 | else if (BASE_LEADING_CODE_P (c - 0x20)) \ | |
736 | { \ | |
737 | unsigned char *p0 = p; \ | |
738 | \ | |
739 | c -= 0x20; \ | |
740 | *p++ = c; \ | |
741 | bytes = BYTES_BY_CHAR_HEAD (c); \ | |
742 | while (--bytes) \ | |
743 | { \ | |
744 | c = SAFE_ONE_MORE_BYTE (); \ | |
745 | if (c < 0) \ | |
746 | break; \ | |
747 | *p++ = c; \ | |
748 | } \ | |
fd3ae0b9 KH |
749 | if (UNIBYTE_STR_AS_MULTIBYTE_P (p0, p - p0, bytes) \ |
750 | || (coding->flags /* We are recovering a file. */ \ | |
751 | && p0[0] == LEADING_CODE_8_BIT_CONTROL \ | |
752 | && ! CHAR_HEAD_P (p0[1]))) \ | |
aa72b389 KH |
753 | c = STRING_CHAR (p0, bytes); \ |
754 | else \ | |
755 | c = -1; \ | |
756 | } \ | |
757 | else \ | |
758 | c = -1; \ | |
759 | } while (0) | |
760 | ||
761 | ||
762 | /* Decode a composition rule represented as a component of composition | |
763 | sequence of Emacs 20 style at SRC. Set C to the rule. If not | |
764 | valid rule is found, set C to -1. */ | |
765 | ||
766 | #define DECODE_EMACS_MULE_COMPOSITION_RULE(c) \ | |
767 | do { \ | |
768 | c = SAFE_ONE_MORE_BYTE (); \ | |
769 | c -= 0xA0; \ | |
770 | if (c < 0 || c >= 81) \ | |
771 | c = -1; \ | |
772 | else \ | |
773 | { \ | |
774 | gref = c / 9, nref = c % 9; \ | |
775 | c = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
776 | } \ | |
777 | } while (0) | |
778 | ||
779 | ||
780 | /* Decode composition sequence encoded by `emacs-mule' at the source | |
781 | pointed by SRC. SRC_END is the end of source. Store information | |
782 | of the composition in CODING->cmp_data. | |
783 | ||
784 | For backward compatibility, decode also a composition sequence of | |
785 | Emacs 20 style. In that case, the composition sequence contains | |
786 | characters that should be extracted into a buffer or string. Store | |
787 | those characters at *DESTINATION in multibyte form. | |
788 | ||
789 | If we encounter an invalid byte sequence, return 0. | |
790 | If we encounter an insufficient source or destination, or | |
791 | insufficient space in CODING->cmp_data, return 1. | |
792 | Otherwise, return consumed bytes in the source. | |
793 | ||
794 | */ | |
795 | static INLINE int | |
796 | decode_composition_emacs_mule (coding, src, src_end, | |
797 | destination, dst_end, dst_bytes) | |
798 | struct coding_system *coding; | |
799 | unsigned char *src, *src_end, **destination, *dst_end; | |
800 | int dst_bytes; | |
801 | { | |
802 | unsigned char *dst = *destination; | |
803 | int method, data_len, nchars; | |
804 | unsigned char *src_base = src++; | |
8ca3766a | 805 | /* Store components of composition. */ |
aa72b389 KH |
806 | int component[COMPOSITION_DATA_MAX_BUNCH_LENGTH]; |
807 | int ncomponent; | |
808 | /* Store multibyte form of characters to be composed. This is for | |
809 | Emacs 20 style composition sequence. */ | |
810 | unsigned char buf[MAX_COMPOSITION_COMPONENTS * MAX_MULTIBYTE_LENGTH]; | |
811 | unsigned char *bufp = buf; | |
812 | int c, i, gref, nref; | |
813 | ||
814 | if (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH | |
815 | >= COMPOSITION_DATA_SIZE) | |
816 | { | |
817 | coding->result = CODING_FINISH_INSUFFICIENT_CMP; | |
818 | return -1; | |
819 | } | |
820 | ||
821 | ONE_MORE_BYTE (c); | |
822 | if (c - 0xF0 >= COMPOSITION_RELATIVE | |
823 | && c - 0xF0 <= COMPOSITION_WITH_RULE_ALTCHARS) | |
824 | { | |
825 | int with_rule; | |
826 | ||
827 | method = c - 0xF0; | |
828 | with_rule = (method == COMPOSITION_WITH_RULE | |
829 | || method == COMPOSITION_WITH_RULE_ALTCHARS); | |
830 | ONE_MORE_BYTE (c); | |
831 | data_len = c - 0xA0; | |
832 | if (data_len < 4 | |
833 | || src_base + data_len > src_end) | |
834 | return 0; | |
835 | ONE_MORE_BYTE (c); | |
836 | nchars = c - 0xA0; | |
837 | if (c < 1) | |
838 | return 0; | |
839 | for (ncomponent = 0; src < src_base + data_len; ncomponent++) | |
840 | { | |
b1887814 RS |
841 | /* If it is longer than this, it can't be valid. */ |
842 | if (ncomponent >= COMPOSITION_DATA_MAX_BUNCH_LENGTH) | |
843 | return 0; | |
844 | ||
aa72b389 KH |
845 | if (ncomponent % 2 && with_rule) |
846 | { | |
847 | ONE_MORE_BYTE (gref); | |
848 | gref -= 32; | |
849 | ONE_MORE_BYTE (nref); | |
850 | nref -= 32; | |
851 | c = COMPOSITION_ENCODE_RULE (gref, nref); | |
852 | } | |
853 | else | |
854 | { | |
855 | int bytes; | |
fd3ae0b9 KH |
856 | if (UNIBYTE_STR_AS_MULTIBYTE_P (src, src_end - src, bytes) |
857 | || (coding->flags /* We are recovering a file. */ | |
858 | && src[0] == LEADING_CODE_8_BIT_CONTROL | |
859 | && ! CHAR_HEAD_P (src[1]))) | |
aa72b389 KH |
860 | c = STRING_CHAR (src, bytes); |
861 | else | |
862 | c = *src, bytes = 1; | |
863 | src += bytes; | |
864 | } | |
865 | component[ncomponent] = c; | |
866 | } | |
867 | } | |
868 | else | |
869 | { | |
870 | /* This may be an old Emacs 20 style format. See the comment at | |
871 | the section 2 of this file. */ | |
872 | while (src < src_end && !CHAR_HEAD_P (*src)) src++; | |
873 | if (src == src_end | |
874 | && !(coding->mode & CODING_MODE_LAST_BLOCK)) | |
875 | goto label_end_of_loop; | |
876 | ||
877 | src_end = src; | |
878 | src = src_base + 1; | |
879 | if (c < 0xC0) | |
880 | { | |
881 | method = COMPOSITION_RELATIVE; | |
882 | for (ncomponent = 0; ncomponent < MAX_COMPOSITION_COMPONENTS;) | |
883 | { | |
884 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
885 | if (c < 0) | |
886 | break; | |
887 | component[ncomponent++] = c; | |
888 | } | |
889 | if (ncomponent < 2) | |
890 | return 0; | |
891 | nchars = ncomponent; | |
892 | } | |
893 | else if (c == 0xFF) | |
894 | { | |
895 | method = COMPOSITION_WITH_RULE; | |
896 | src++; | |
897 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
898 | if (c < 0) | |
899 | return 0; | |
900 | component[0] = c; | |
901 | for (ncomponent = 1; | |
902 | ncomponent < MAX_COMPOSITION_COMPONENTS * 2 - 1;) | |
903 | { | |
904 | DECODE_EMACS_MULE_COMPOSITION_RULE (c); | |
905 | if (c < 0) | |
906 | break; | |
907 | component[ncomponent++] = c; | |
908 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
909 | if (c < 0) | |
910 | break; | |
911 | component[ncomponent++] = c; | |
912 | } | |
913 | if (ncomponent < 3) | |
914 | return 0; | |
915 | nchars = (ncomponent + 1) / 2; | |
916 | } | |
917 | else | |
918 | return 0; | |
919 | } | |
920 | ||
921 | if (buf == bufp || dst + (bufp - buf) <= (dst_bytes ? dst_end : src)) | |
922 | { | |
923 | CODING_ADD_COMPOSITION_START (coding, coding->produced_char, method); | |
924 | for (i = 0; i < ncomponent; i++) | |
925 | CODING_ADD_COMPOSITION_COMPONENT (coding, component[i]); | |
93dec019 | 926 | CODING_ADD_COMPOSITION_END (coding, coding->produced_char + nchars); |
aa72b389 KH |
927 | if (buf < bufp) |
928 | { | |
929 | unsigned char *p = buf; | |
930 | EMIT_BYTES (p, bufp); | |
931 | *destination += bufp - buf; | |
932 | coding->produced_char += nchars; | |
933 | } | |
934 | return (src - src_base); | |
935 | } | |
936 | label_end_of_loop: | |
937 | return -1; | |
938 | } | |
939 | ||
b73bfc1c | 940 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
4ed46869 | 941 | |
b73bfc1c KH |
942 | static void |
943 | decode_coding_emacs_mule (coding, source, destination, src_bytes, dst_bytes) | |
944 | struct coding_system *coding; | |
945 | unsigned char *source, *destination; | |
946 | int src_bytes, dst_bytes; | |
947 | { | |
948 | unsigned char *src = source; | |
949 | unsigned char *src_end = source + src_bytes; | |
950 | unsigned char *dst = destination; | |
951 | unsigned char *dst_end = destination + dst_bytes; | |
952 | /* SRC_BASE remembers the start position in source in each loop. | |
953 | The loop will be exited when there's not enough source code, or | |
954 | when there's not enough destination area to produce a | |
955 | character. */ | |
956 | unsigned char *src_base; | |
4ed46869 | 957 | |
b73bfc1c | 958 | coding->produced_char = 0; |
8a33cf7b | 959 | while ((src_base = src) < src_end) |
b73bfc1c KH |
960 | { |
961 | unsigned char tmp[MAX_MULTIBYTE_LENGTH], *p; | |
962 | int bytes; | |
ec6d2bb8 | 963 | |
4af310db EZ |
964 | if (*src == '\r') |
965 | { | |
2bcdf662 | 966 | int c = *src++; |
4af310db | 967 | |
4af310db EZ |
968 | if (coding->eol_type == CODING_EOL_CR) |
969 | c = '\n'; | |
970 | else if (coding->eol_type == CODING_EOL_CRLF) | |
971 | { | |
972 | ONE_MORE_BYTE (c); | |
973 | if (c != '\n') | |
974 | { | |
4af310db EZ |
975 | src--; |
976 | c = '\r'; | |
977 | } | |
978 | } | |
979 | *dst++ = c; | |
980 | coding->produced_char++; | |
981 | continue; | |
982 | } | |
983 | else if (*src == '\n') | |
984 | { | |
985 | if ((coding->eol_type == CODING_EOL_CR | |
986 | || coding->eol_type == CODING_EOL_CRLF) | |
987 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
988 | { | |
989 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
990 | goto label_end_of_loop; | |
991 | } | |
992 | *dst++ = *src++; | |
993 | coding->produced_char++; | |
994 | continue; | |
995 | } | |
3089d25c | 996 | else if (*src == 0x80 && coding->cmp_data) |
aa72b389 KH |
997 | { |
998 | /* Start of composition data. */ | |
999 | int consumed = decode_composition_emacs_mule (coding, src, src_end, | |
1000 | &dst, dst_end, | |
1001 | dst_bytes); | |
1002 | if (consumed < 0) | |
1003 | goto label_end_of_loop; | |
1004 | else if (consumed > 0) | |
1005 | { | |
1006 | src += consumed; | |
1007 | continue; | |
1008 | } | |
1009 | bytes = CHAR_STRING (*src, tmp); | |
1010 | p = tmp; | |
1011 | src++; | |
1012 | } | |
fd3ae0b9 KH |
1013 | else if (UNIBYTE_STR_AS_MULTIBYTE_P (src, src_end - src, bytes) |
1014 | || (coding->flags /* We are recovering a file. */ | |
1015 | && src[0] == LEADING_CODE_8_BIT_CONTROL | |
1016 | && ! CHAR_HEAD_P (src[1]))) | |
b73bfc1c KH |
1017 | { |
1018 | p = src; | |
1019 | src += bytes; | |
1020 | } | |
1021 | else | |
1022 | { | |
1023 | bytes = CHAR_STRING (*src, tmp); | |
1024 | p = tmp; | |
1025 | src++; | |
1026 | } | |
1027 | if (dst + bytes >= (dst_bytes ? dst_end : src)) | |
1028 | { | |
1029 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
4ed46869 KH |
1030 | break; |
1031 | } | |
b73bfc1c KH |
1032 | while (bytes--) *dst++ = *p++; |
1033 | coding->produced_char++; | |
4ed46869 | 1034 | } |
4af310db | 1035 | label_end_of_loop: |
b73bfc1c KH |
1036 | coding->consumed = coding->consumed_char = src_base - source; |
1037 | coding->produced = dst - destination; | |
4ed46869 KH |
1038 | } |
1039 | ||
b73bfc1c | 1040 | |
aa72b389 KH |
1041 | /* Encode composition data stored at DATA into a special byte sequence |
1042 | starting by 0x80. Update CODING->cmp_data_start and maybe | |
1043 | CODING->cmp_data for the next call. */ | |
1044 | ||
1045 | #define ENCODE_COMPOSITION_EMACS_MULE(coding, data) \ | |
1046 | do { \ | |
1047 | unsigned char buf[1024], *p0 = buf, *p; \ | |
1048 | int len = data[0]; \ | |
1049 | int i; \ | |
1050 | \ | |
1051 | buf[0] = 0x80; \ | |
1052 | buf[1] = 0xF0 + data[3]; /* METHOD */ \ | |
1053 | buf[3] = 0xA0 + (data[2] - data[1]); /* COMPOSED-CHARS */ \ | |
1054 | p = buf + 4; \ | |
1055 | if (data[3] == COMPOSITION_WITH_RULE \ | |
1056 | || data[3] == COMPOSITION_WITH_RULE_ALTCHARS) \ | |
1057 | { \ | |
1058 | p += CHAR_STRING (data[4], p); \ | |
1059 | for (i = 5; i < len; i += 2) \ | |
1060 | { \ | |
1061 | int gref, nref; \ | |
1062 | COMPOSITION_DECODE_RULE (data[i], gref, nref); \ | |
1063 | *p++ = 0x20 + gref; \ | |
1064 | *p++ = 0x20 + nref; \ | |
1065 | p += CHAR_STRING (data[i + 1], p); \ | |
1066 | } \ | |
1067 | } \ | |
1068 | else \ | |
1069 | { \ | |
1070 | for (i = 4; i < len; i++) \ | |
1071 | p += CHAR_STRING (data[i], p); \ | |
1072 | } \ | |
1073 | buf[2] = 0xA0 + (p - buf); /* COMPONENTS-BYTES */ \ | |
1074 | \ | |
1075 | if (dst + (p - buf) + 4 > (dst_bytes ? dst_end : src)) \ | |
1076 | { \ | |
1077 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
1078 | goto label_end_of_loop; \ | |
1079 | } \ | |
1080 | while (p0 < p) \ | |
1081 | *dst++ = *p0++; \ | |
1082 | coding->cmp_data_start += data[0]; \ | |
1083 | if (coding->cmp_data_start == coding->cmp_data->used \ | |
1084 | && coding->cmp_data->next) \ | |
1085 | { \ | |
1086 | coding->cmp_data = coding->cmp_data->next; \ | |
1087 | coding->cmp_data_start = 0; \ | |
1088 | } \ | |
1089 | } while (0) | |
93dec019 | 1090 | |
aa72b389 | 1091 | |
a4244313 | 1092 | static void encode_eol P_ ((struct coding_system *, const unsigned char *, |
aa72b389 KH |
1093 | unsigned char *, int, int)); |
1094 | ||
1095 | static void | |
1096 | encode_coding_emacs_mule (coding, source, destination, src_bytes, dst_bytes) | |
1097 | struct coding_system *coding; | |
1098 | unsigned char *source, *destination; | |
1099 | int src_bytes, dst_bytes; | |
1100 | { | |
1101 | unsigned char *src = source; | |
1102 | unsigned char *src_end = source + src_bytes; | |
1103 | unsigned char *dst = destination; | |
1104 | unsigned char *dst_end = destination + dst_bytes; | |
1105 | unsigned char *src_base; | |
1106 | int c; | |
1107 | int char_offset; | |
1108 | int *data; | |
1109 | ||
1110 | Lisp_Object translation_table; | |
1111 | ||
1112 | translation_table = Qnil; | |
1113 | ||
1114 | /* Optimization for the case that there's no composition. */ | |
1115 | if (!coding->cmp_data || coding->cmp_data->used == 0) | |
1116 | { | |
1117 | encode_eol (coding, source, destination, src_bytes, dst_bytes); | |
1118 | return; | |
1119 | } | |
1120 | ||
1121 | char_offset = coding->cmp_data->char_offset; | |
1122 | data = coding->cmp_data->data + coding->cmp_data_start; | |
1123 | while (1) | |
1124 | { | |
1125 | src_base = src; | |
1126 | ||
1127 | /* If SRC starts a composition, encode the information about the | |
1128 | composition in advance. */ | |
1129 | if (coding->cmp_data_start < coding->cmp_data->used | |
1130 | && char_offset + coding->consumed_char == data[1]) | |
1131 | { | |
1132 | ENCODE_COMPOSITION_EMACS_MULE (coding, data); | |
1133 | char_offset = coding->cmp_data->char_offset; | |
1134 | data = coding->cmp_data->data + coding->cmp_data_start; | |
1135 | } | |
1136 | ||
1137 | ONE_MORE_CHAR (c); | |
1138 | if (c == '\n' && (coding->eol_type == CODING_EOL_CRLF | |
1139 | || coding->eol_type == CODING_EOL_CR)) | |
1140 | { | |
1141 | if (coding->eol_type == CODING_EOL_CRLF) | |
1142 | EMIT_TWO_BYTES ('\r', c); | |
1143 | else | |
1144 | EMIT_ONE_BYTE ('\r'); | |
1145 | } | |
1146 | else if (SINGLE_BYTE_CHAR_P (c)) | |
fd3ae0b9 KH |
1147 | { |
1148 | if (coding->flags && ! ASCII_BYTE_P (c)) | |
1149 | { | |
1150 | /* As we are auto saving, retain the multibyte form for | |
1151 | 8-bit chars. */ | |
1152 | unsigned char buf[MAX_MULTIBYTE_LENGTH]; | |
1153 | int bytes = CHAR_STRING (c, buf); | |
1154 | ||
1155 | if (bytes == 1) | |
1156 | EMIT_ONE_BYTE (buf[0]); | |
1157 | else | |
1158 | EMIT_TWO_BYTES (buf[0], buf[1]); | |
1159 | } | |
1160 | else | |
1161 | EMIT_ONE_BYTE (c); | |
1162 | } | |
aa72b389 KH |
1163 | else |
1164 | EMIT_BYTES (src_base, src); | |
1165 | coding->consumed_char++; | |
1166 | } | |
1167 | label_end_of_loop: | |
1168 | coding->consumed = src_base - source; | |
1169 | coding->produced = coding->produced_char = dst - destination; | |
1170 | return; | |
1171 | } | |
b73bfc1c | 1172 | |
4ed46869 KH |
1173 | \f |
1174 | /*** 3. ISO2022 handlers ***/ | |
1175 | ||
1176 | /* The following note describes the coding system ISO2022 briefly. | |
39787efd | 1177 | Since the intention of this note is to help understand the |
cfb43547 | 1178 | functions in this file, some parts are NOT ACCURATE or are OVERLY |
39787efd | 1179 | SIMPLIFIED. For thorough understanding, please refer to the |
cfb43547 DL |
1180 | original document of ISO2022. This is equivalent to the standard |
1181 | ECMA-35, obtainable from <URL:http://www.ecma.ch/> (*). | |
4ed46869 KH |
1182 | |
1183 | ISO2022 provides many mechanisms to encode several character sets | |
cfb43547 | 1184 | in 7-bit and 8-bit environments. For 7-bit environments, all text |
39787efd KH |
1185 | is encoded using bytes less than 128. This may make the encoded |
1186 | text a little bit longer, but the text passes more easily through | |
cfb43547 | 1187 | several types of gateway, some of which strip off the MSB (Most |
8ca3766a | 1188 | Significant Bit). |
b73bfc1c | 1189 | |
cfb43547 DL |
1190 | There are two kinds of character sets: control character sets and |
1191 | graphic character sets. The former contain control characters such | |
4ed46869 | 1192 | as `newline' and `escape' to provide control functions (control |
39787efd | 1193 | functions are also provided by escape sequences). The latter |
cfb43547 | 1194 | contain graphic characters such as 'A' and '-'. Emacs recognizes |
4ed46869 KH |
1195 | two control character sets and many graphic character sets. |
1196 | ||
1197 | Graphic character sets are classified into one of the following | |
39787efd KH |
1198 | four classes, according to the number of bytes (DIMENSION) and |
1199 | number of characters in one dimension (CHARS) of the set: | |
1200 | - DIMENSION1_CHARS94 | |
1201 | - DIMENSION1_CHARS96 | |
1202 | - DIMENSION2_CHARS94 | |
1203 | - DIMENSION2_CHARS96 | |
1204 | ||
1205 | In addition, each character set is assigned an identification tag, | |
cfb43547 | 1206 | unique for each set, called the "final character" (denoted as <F> |
39787efd KH |
1207 | hereafter). The <F> of each character set is decided by ECMA(*) |
1208 | when it is registered in ISO. The code range of <F> is 0x30..0x7F | |
1209 | (0x30..0x3F are for private use only). | |
4ed46869 KH |
1210 | |
1211 | Note (*): ECMA = European Computer Manufacturers Association | |
1212 | ||
cfb43547 | 1213 | Here are examples of graphic character sets [NAME(<F>)]: |
4ed46869 KH |
1214 | o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ... |
1215 | o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ... | |
1216 | o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ... | |
1217 | o DIMENSION2_CHARS96 -- none for the moment | |
1218 | ||
39787efd | 1219 | A code area (1 byte=8 bits) is divided into 4 areas, C0, GL, C1, and GR. |
4ed46869 KH |
1220 | C0 [0x00..0x1F] -- control character plane 0 |
1221 | GL [0x20..0x7F] -- graphic character plane 0 | |
1222 | C1 [0x80..0x9F] -- control character plane 1 | |
1223 | GR [0xA0..0xFF] -- graphic character plane 1 | |
1224 | ||
1225 | A control character set is directly designated and invoked to C0 or | |
39787efd KH |
1226 | C1 by an escape sequence. The most common case is that: |
1227 | - ISO646's control character set is designated/invoked to C0, and | |
1228 | - ISO6429's control character set is designated/invoked to C1, | |
1229 | and usually these designations/invocations are omitted in encoded | |
1230 | text. In a 7-bit environment, only C0 can be used, and a control | |
1231 | character for C1 is encoded by an appropriate escape sequence to | |
1232 | fit into the environment. All control characters for C1 are | |
1233 | defined to have corresponding escape sequences. | |
4ed46869 KH |
1234 | |
1235 | A graphic character set is at first designated to one of four | |
1236 | graphic registers (G0 through G3), then these graphic registers are | |
1237 | invoked to GL or GR. These designations and invocations can be | |
1238 | done independently. The most common case is that G0 is invoked to | |
39787efd KH |
1239 | GL, G1 is invoked to GR, and ASCII is designated to G0. Usually |
1240 | these invocations and designations are omitted in encoded text. | |
1241 | In a 7-bit environment, only GL can be used. | |
4ed46869 | 1242 | |
39787efd KH |
1243 | When a graphic character set of CHARS94 is invoked to GL, codes |
1244 | 0x20 and 0x7F of the GL area work as control characters SPACE and | |
1245 | DEL respectively, and codes 0xA0 and 0xFF of the GR area should not | |
1246 | be used. | |
4ed46869 KH |
1247 | |
1248 | There are two ways of invocation: locking-shift and single-shift. | |
1249 | With locking-shift, the invocation lasts until the next different | |
39787efd KH |
1250 | invocation, whereas with single-shift, the invocation affects the |
1251 | following character only and doesn't affect the locking-shift | |
1252 | state. Invocations are done by the following control characters or | |
1253 | escape sequences: | |
4ed46869 KH |
1254 | |
1255 | ---------------------------------------------------------------------- | |
39787efd | 1256 | abbrev function cntrl escape seq description |
4ed46869 | 1257 | ---------------------------------------------------------------------- |
39787efd KH |
1258 | SI/LS0 (shift-in) 0x0F none invoke G0 into GL |
1259 | SO/LS1 (shift-out) 0x0E none invoke G1 into GL | |
1260 | LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL | |
1261 | LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL | |
1262 | LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*) | |
1263 | LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*) | |
1264 | LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*) | |
1265 | SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char | |
1266 | SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char | |
4ed46869 | 1267 | ---------------------------------------------------------------------- |
39787efd KH |
1268 | (*) These are not used by any known coding system. |
1269 | ||
1270 | Control characters for these functions are defined by macros | |
1271 | ISO_CODE_XXX in `coding.h'. | |
4ed46869 | 1272 | |
39787efd | 1273 | Designations are done by the following escape sequences: |
4ed46869 KH |
1274 | ---------------------------------------------------------------------- |
1275 | escape sequence description | |
1276 | ---------------------------------------------------------------------- | |
1277 | ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0 | |
1278 | ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1 | |
1279 | ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2 | |
1280 | ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3 | |
1281 | ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*) | |
1282 | ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1 | |
1283 | ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2 | |
1284 | ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3 | |
1285 | ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**) | |
1286 | ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1 | |
1287 | ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2 | |
1288 | ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3 | |
1289 | ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*) | |
1290 | ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1 | |
1291 | ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2 | |
1292 | ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3 | |
1293 | ---------------------------------------------------------------------- | |
1294 | ||
1295 | In this list, "DIMENSION1_CHARS94<F>" means a graphic character set | |
39787efd | 1296 | of dimension 1, chars 94, and final character <F>, etc... |
4ed46869 KH |
1297 | |
1298 | Note (*): Although these designations are not allowed in ISO2022, | |
1299 | Emacs accepts them on decoding, and produces them on encoding | |
39787efd | 1300 | CHARS96 character sets in a coding system which is characterized as |
4ed46869 KH |
1301 | 7-bit environment, non-locking-shift, and non-single-shift. |
1302 | ||
1303 | Note (**): If <F> is '@', 'A', or 'B', the intermediate character | |
39787efd | 1304 | '(' can be omitted. We refer to this as "short-form" hereafter. |
4ed46869 | 1305 | |
cfb43547 | 1306 | Now you may notice that there are a lot of ways of encoding the |
39787efd KH |
1307 | same multilingual text in ISO2022. Actually, there exist many |
1308 | coding systems such as Compound Text (used in X11's inter client | |
8ca3766a DL |
1309 | communication, ISO-2022-JP (used in Japanese Internet), ISO-2022-KR |
1310 | (used in Korean Internet), EUC (Extended UNIX Code, used in Asian | |
4ed46869 KH |
1311 | localized platforms), and all of these are variants of ISO2022. |
1312 | ||
1313 | In addition to the above, Emacs handles two more kinds of escape | |
1314 | sequences: ISO6429's direction specification and Emacs' private | |
1315 | sequence for specifying character composition. | |
1316 | ||
39787efd | 1317 | ISO6429's direction specification takes the following form: |
4ed46869 KH |
1318 | o CSI ']' -- end of the current direction |
1319 | o CSI '0' ']' -- end of the current direction | |
1320 | o CSI '1' ']' -- start of left-to-right text | |
1321 | o CSI '2' ']' -- start of right-to-left text | |
1322 | The control character CSI (0x9B: control sequence introducer) is | |
39787efd KH |
1323 | abbreviated to the escape sequence ESC '[' in a 7-bit environment. |
1324 | ||
1325 | Character composition specification takes the following form: | |
ec6d2bb8 KH |
1326 | o ESC '0' -- start relative composition |
1327 | o ESC '1' -- end composition | |
1328 | o ESC '2' -- start rule-base composition (*) | |
1329 | o ESC '3' -- start relative composition with alternate chars (**) | |
1330 | o ESC '4' -- start rule-base composition with alternate chars (**) | |
b73bfc1c | 1331 | Since these are not standard escape sequences of any ISO standard, |
cfb43547 | 1332 | the use of them with these meanings is restricted to Emacs only. |
ec6d2bb8 | 1333 | |
cfb43547 | 1334 | (*) This form is used only in Emacs 20.5 and older versions, |
b73bfc1c | 1335 | but the newer versions can safely decode it. |
cfb43547 | 1336 | (**) This form is used only in Emacs 21.1 and newer versions, |
b73bfc1c | 1337 | and the older versions can't decode it. |
ec6d2bb8 | 1338 | |
cfb43547 | 1339 | Here's a list of example usages of these composition escape |
b73bfc1c | 1340 | sequences (categorized by `enum composition_method'). |
ec6d2bb8 | 1341 | |
b73bfc1c | 1342 | COMPOSITION_RELATIVE: |
ec6d2bb8 | 1343 | ESC 0 CHAR [ CHAR ] ESC 1 |
8ca3766a | 1344 | COMPOSITION_WITH_RULE: |
ec6d2bb8 | 1345 | ESC 2 CHAR [ RULE CHAR ] ESC 1 |
b73bfc1c | 1346 | COMPOSITION_WITH_ALTCHARS: |
ec6d2bb8 | 1347 | ESC 3 ALTCHAR [ ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 |
b73bfc1c | 1348 | COMPOSITION_WITH_RULE_ALTCHARS: |
ec6d2bb8 | 1349 | ESC 4 ALTCHAR [ RULE ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 */ |
4ed46869 KH |
1350 | |
1351 | enum iso_code_class_type iso_code_class[256]; | |
1352 | ||
05e6f5dc KH |
1353 | #define CHARSET_OK(idx, charset, c) \ |
1354 | (coding_system_table[idx] \ | |
1355 | && (charset == CHARSET_ASCII \ | |
6b89e3aa | 1356 | || (safe_chars = coding_safe_chars (coding_system_table[idx]->symbol), \ |
05e6f5dc KH |
1357 | CODING_SAFE_CHAR_P (safe_chars, c))) \ |
1358 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding_system_table[idx], \ | |
1359 | charset) \ | |
1360 | != CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION)) | |
d46c5b12 KH |
1361 | |
1362 | #define SHIFT_OUT_OK(idx) \ | |
1363 | (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding_system_table[idx], 1) >= 0) | |
1364 | ||
b6871cc7 KH |
1365 | #define COMPOSITION_OK(idx) \ |
1366 | (coding_system_table[idx]->composing != COMPOSITION_DISABLED) | |
1367 | ||
4ed46869 | 1368 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
cfb43547 | 1369 | Check if a text is encoded in ISO2022. If it is, return an |
4ed46869 KH |
1370 | integer in which appropriate flag bits any of: |
1371 | CODING_CATEGORY_MASK_ISO_7 | |
d46c5b12 | 1372 | CODING_CATEGORY_MASK_ISO_7_TIGHT |
4ed46869 KH |
1373 | CODING_CATEGORY_MASK_ISO_8_1 |
1374 | CODING_CATEGORY_MASK_ISO_8_2 | |
7717c392 KH |
1375 | CODING_CATEGORY_MASK_ISO_7_ELSE |
1376 | CODING_CATEGORY_MASK_ISO_8_ELSE | |
4ed46869 KH |
1377 | are set. If a code which should never appear in ISO2022 is found, |
1378 | returns 0. */ | |
1379 | ||
0a28aafb KH |
1380 | static int |
1381 | detect_coding_iso2022 (src, src_end, multibytep) | |
4ed46869 | 1382 | unsigned char *src, *src_end; |
0a28aafb | 1383 | int multibytep; |
4ed46869 | 1384 | { |
d46c5b12 KH |
1385 | int mask = CODING_CATEGORY_MASK_ISO; |
1386 | int mask_found = 0; | |
f46869e4 | 1387 | int reg[4], shift_out = 0, single_shifting = 0; |
da55a2b7 | 1388 | int c, c1, charset; |
b73bfc1c KH |
1389 | /* Dummy for ONE_MORE_BYTE. */ |
1390 | struct coding_system dummy_coding; | |
1391 | struct coding_system *coding = &dummy_coding; | |
05e6f5dc | 1392 | Lisp_Object safe_chars; |
3f003981 | 1393 | |
d46c5b12 | 1394 | reg[0] = CHARSET_ASCII, reg[1] = reg[2] = reg[3] = -1; |
3f003981 | 1395 | while (mask && src < src_end) |
4ed46869 | 1396 | { |
0a28aafb | 1397 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
8d239c89 | 1398 | retry: |
4ed46869 KH |
1399 | switch (c) |
1400 | { | |
1401 | case ISO_CODE_ESC: | |
74383408 KH |
1402 | if (inhibit_iso_escape_detection) |
1403 | break; | |
f46869e4 | 1404 | single_shifting = 0; |
0a28aafb | 1405 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
d46c5b12 | 1406 | if (c >= '(' && c <= '/') |
4ed46869 | 1407 | { |
bf9cdd4e | 1408 | /* Designation sequence for a charset of dimension 1. */ |
0a28aafb | 1409 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
d46c5b12 KH |
1410 | if (c1 < ' ' || c1 >= 0x80 |
1411 | || (charset = iso_charset_table[0][c >= ','][c1]) < 0) | |
1412 | /* Invalid designation sequence. Just ignore. */ | |
1413 | break; | |
1414 | reg[(c - '(') % 4] = charset; | |
bf9cdd4e KH |
1415 | } |
1416 | else if (c == '$') | |
1417 | { | |
1418 | /* Designation sequence for a charset of dimension 2. */ | |
0a28aafb | 1419 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
bf9cdd4e KH |
1420 | if (c >= '@' && c <= 'B') |
1421 | /* Designation for JISX0208.1978, GB2312, or JISX0208. */ | |
d46c5b12 | 1422 | reg[0] = charset = iso_charset_table[1][0][c]; |
bf9cdd4e | 1423 | else if (c >= '(' && c <= '/') |
bcf26d6a | 1424 | { |
0a28aafb | 1425 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
d46c5b12 KH |
1426 | if (c1 < ' ' || c1 >= 0x80 |
1427 | || (charset = iso_charset_table[1][c >= ','][c1]) < 0) | |
1428 | /* Invalid designation sequence. Just ignore. */ | |
1429 | break; | |
1430 | reg[(c - '(') % 4] = charset; | |
bcf26d6a | 1431 | } |
bf9cdd4e | 1432 | else |
d46c5b12 KH |
1433 | /* Invalid designation sequence. Just ignore. */ |
1434 | break; | |
1435 | } | |
ae9ff118 | 1436 | else if (c == 'N' || c == 'O') |
d46c5b12 | 1437 | { |
ae9ff118 KH |
1438 | /* ESC <Fe> for SS2 or SS3. */ |
1439 | mask &= CODING_CATEGORY_MASK_ISO_7_ELSE; | |
d46c5b12 | 1440 | break; |
4ed46869 | 1441 | } |
ec6d2bb8 KH |
1442 | else if (c >= '0' && c <= '4') |
1443 | { | |
1444 | /* ESC <Fp> for start/end composition. */ | |
b6871cc7 KH |
1445 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_7)) |
1446 | mask_found |= CODING_CATEGORY_MASK_ISO_7; | |
1447 | else | |
1448 | mask &= ~CODING_CATEGORY_MASK_ISO_7; | |
1449 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_7_TIGHT)) | |
1450 | mask_found |= CODING_CATEGORY_MASK_ISO_7_TIGHT; | |
1451 | else | |
1452 | mask &= ~CODING_CATEGORY_MASK_ISO_7_TIGHT; | |
1453 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_8_1)) | |
1454 | mask_found |= CODING_CATEGORY_MASK_ISO_8_1; | |
1455 | else | |
1456 | mask &= ~CODING_CATEGORY_MASK_ISO_8_1; | |
1457 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_8_2)) | |
1458 | mask_found |= CODING_CATEGORY_MASK_ISO_8_2; | |
1459 | else | |
1460 | mask &= ~CODING_CATEGORY_MASK_ISO_8_2; | |
1461 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_7_ELSE)) | |
1462 | mask_found |= CODING_CATEGORY_MASK_ISO_7_ELSE; | |
1463 | else | |
1464 | mask &= ~CODING_CATEGORY_MASK_ISO_7_ELSE; | |
1465 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_8_ELSE)) | |
1466 | mask_found |= CODING_CATEGORY_MASK_ISO_8_ELSE; | |
1467 | else | |
1468 | mask &= ~CODING_CATEGORY_MASK_ISO_8_ELSE; | |
ec6d2bb8 KH |
1469 | break; |
1470 | } | |
bf9cdd4e | 1471 | else |
d46c5b12 KH |
1472 | /* Invalid escape sequence. Just ignore. */ |
1473 | break; | |
1474 | ||
1475 | /* We found a valid designation sequence for CHARSET. */ | |
1476 | mask &= ~CODING_CATEGORY_MASK_ISO_8BIT; | |
05e6f5dc KH |
1477 | c = MAKE_CHAR (charset, 0, 0); |
1478 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7, charset, c)) | |
d46c5b12 KH |
1479 | mask_found |= CODING_CATEGORY_MASK_ISO_7; |
1480 | else | |
1481 | mask &= ~CODING_CATEGORY_MASK_ISO_7; | |
05e6f5dc | 1482 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_TIGHT, charset, c)) |
d46c5b12 KH |
1483 | mask_found |= CODING_CATEGORY_MASK_ISO_7_TIGHT; |
1484 | else | |
1485 | mask &= ~CODING_CATEGORY_MASK_ISO_7_TIGHT; | |
05e6f5dc | 1486 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_ELSE, charset, c)) |
ae9ff118 KH |
1487 | mask_found |= CODING_CATEGORY_MASK_ISO_7_ELSE; |
1488 | else | |
d46c5b12 | 1489 | mask &= ~CODING_CATEGORY_MASK_ISO_7_ELSE; |
05e6f5dc | 1490 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_8_ELSE, charset, c)) |
ae9ff118 KH |
1491 | mask_found |= CODING_CATEGORY_MASK_ISO_8_ELSE; |
1492 | else | |
d46c5b12 | 1493 | mask &= ~CODING_CATEGORY_MASK_ISO_8_ELSE; |
4ed46869 KH |
1494 | break; |
1495 | ||
4ed46869 | 1496 | case ISO_CODE_SO: |
74383408 KH |
1497 | if (inhibit_iso_escape_detection) |
1498 | break; | |
f46869e4 | 1499 | single_shifting = 0; |
d46c5b12 KH |
1500 | if (shift_out == 0 |
1501 | && (reg[1] >= 0 | |
1502 | || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_7_ELSE) | |
1503 | || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_8_ELSE))) | |
1504 | { | |
1505 | /* Locking shift out. */ | |
1506 | mask &= ~CODING_CATEGORY_MASK_ISO_7BIT; | |
1507 | mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT; | |
1508 | } | |
e0e989f6 | 1509 | break; |
93dec019 | 1510 | |
d46c5b12 | 1511 | case ISO_CODE_SI: |
74383408 KH |
1512 | if (inhibit_iso_escape_detection) |
1513 | break; | |
f46869e4 | 1514 | single_shifting = 0; |
d46c5b12 KH |
1515 | if (shift_out == 1) |
1516 | { | |
1517 | /* Locking shift in. */ | |
1518 | mask &= ~CODING_CATEGORY_MASK_ISO_7BIT; | |
1519 | mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT; | |
1520 | } | |
1521 | break; | |
1522 | ||
4ed46869 | 1523 | case ISO_CODE_CSI: |
f46869e4 | 1524 | single_shifting = 0; |
4ed46869 KH |
1525 | case ISO_CODE_SS2: |
1526 | case ISO_CODE_SS3: | |
3f003981 KH |
1527 | { |
1528 | int newmask = CODING_CATEGORY_MASK_ISO_8_ELSE; | |
1529 | ||
74383408 KH |
1530 | if (inhibit_iso_escape_detection) |
1531 | break; | |
70c22245 KH |
1532 | if (c != ISO_CODE_CSI) |
1533 | { | |
d46c5b12 KH |
1534 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1535 | & CODING_FLAG_ISO_SINGLE_SHIFT) | |
70c22245 | 1536 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1537 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1538 | & CODING_FLAG_ISO_SINGLE_SHIFT) | |
70c22245 | 1539 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
f46869e4 | 1540 | single_shifting = 1; |
70c22245 | 1541 | } |
3f003981 KH |
1542 | if (VECTORP (Vlatin_extra_code_table) |
1543 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
1544 | { | |
d46c5b12 KH |
1545 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1546 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 | 1547 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1548 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1549 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 KH |
1550 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
1551 | } | |
1552 | mask &= newmask; | |
d46c5b12 | 1553 | mask_found |= newmask; |
3f003981 KH |
1554 | } |
1555 | break; | |
4ed46869 KH |
1556 | |
1557 | default: | |
1558 | if (c < 0x80) | |
f46869e4 KH |
1559 | { |
1560 | single_shifting = 0; | |
1561 | break; | |
1562 | } | |
4ed46869 | 1563 | else if (c < 0xA0) |
c4825358 | 1564 | { |
f46869e4 | 1565 | single_shifting = 0; |
3f003981 KH |
1566 | if (VECTORP (Vlatin_extra_code_table) |
1567 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
c4825358 | 1568 | { |
3f003981 KH |
1569 | int newmask = 0; |
1570 | ||
d46c5b12 KH |
1571 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1572 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 | 1573 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1574 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1575 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 KH |
1576 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
1577 | mask &= newmask; | |
d46c5b12 | 1578 | mask_found |= newmask; |
c4825358 | 1579 | } |
3f003981 KH |
1580 | else |
1581 | return 0; | |
c4825358 | 1582 | } |
4ed46869 KH |
1583 | else |
1584 | { | |
d46c5b12 | 1585 | mask &= ~(CODING_CATEGORY_MASK_ISO_7BIT |
7717c392 | 1586 | | CODING_CATEGORY_MASK_ISO_7_ELSE); |
d46c5b12 | 1587 | mask_found |= CODING_CATEGORY_MASK_ISO_8_1; |
f46869e4 KH |
1588 | /* Check the length of succeeding codes of the range |
1589 | 0xA0..0FF. If the byte length is odd, we exclude | |
1590 | CODING_CATEGORY_MASK_ISO_8_2. We can check this only | |
1591 | when we are not single shifting. */ | |
b73bfc1c KH |
1592 | if (!single_shifting |
1593 | && mask & CODING_CATEGORY_MASK_ISO_8_2) | |
f46869e4 | 1594 | { |
e17de821 | 1595 | int i = 1; |
8d239c89 KH |
1596 | |
1597 | c = -1; | |
b73bfc1c KH |
1598 | while (src < src_end) |
1599 | { | |
0a28aafb | 1600 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
b73bfc1c KH |
1601 | if (c < 0xA0) |
1602 | break; | |
1603 | i++; | |
1604 | } | |
1605 | ||
1606 | if (i & 1 && src < src_end) | |
f46869e4 KH |
1607 | mask &= ~CODING_CATEGORY_MASK_ISO_8_2; |
1608 | else | |
1609 | mask_found |= CODING_CATEGORY_MASK_ISO_8_2; | |
8d239c89 KH |
1610 | if (c >= 0) |
1611 | /* This means that we have read one extra byte. */ | |
1612 | goto retry; | |
f46869e4 | 1613 | } |
4ed46869 KH |
1614 | } |
1615 | break; | |
1616 | } | |
1617 | } | |
b73bfc1c | 1618 | label_end_of_loop: |
d46c5b12 | 1619 | return (mask & mask_found); |
4ed46869 KH |
1620 | } |
1621 | ||
b73bfc1c KH |
1622 | /* Decode a character of which charset is CHARSET, the 1st position |
1623 | code is C1, the 2nd position code is C2, and return the decoded | |
1624 | character code. If the variable `translation_table' is non-nil, | |
1625 | returned the translated code. */ | |
ec6d2bb8 | 1626 | |
b73bfc1c KH |
1627 | #define DECODE_ISO_CHARACTER(charset, c1, c2) \ |
1628 | (NILP (translation_table) \ | |
1629 | ? MAKE_CHAR (charset, c1, c2) \ | |
1630 | : translate_char (translation_table, -1, charset, c1, c2)) | |
4ed46869 KH |
1631 | |
1632 | /* Set designation state into CODING. */ | |
d46c5b12 KH |
1633 | #define DECODE_DESIGNATION(reg, dimension, chars, final_char) \ |
1634 | do { \ | |
05e6f5dc | 1635 | int charset, c; \ |
944bd420 KH |
1636 | \ |
1637 | if (final_char < '0' || final_char >= 128) \ | |
1638 | goto label_invalid_code; \ | |
1639 | charset = ISO_CHARSET_TABLE (make_number (dimension), \ | |
1640 | make_number (chars), \ | |
1641 | make_number (final_char)); \ | |
05e6f5dc | 1642 | c = MAKE_CHAR (charset, 0, 0); \ |
d46c5b12 | 1643 | if (charset >= 0 \ |
704c5781 | 1644 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) == reg \ |
05e6f5dc | 1645 | || CODING_SAFE_CHAR_P (safe_chars, c))) \ |
d46c5b12 KH |
1646 | { \ |
1647 | if (coding->spec.iso2022.last_invalid_designation_register == 0 \ | |
1648 | && reg == 0 \ | |
1649 | && charset == CHARSET_ASCII) \ | |
1650 | { \ | |
1651 | /* We should insert this designation sequence as is so \ | |
1652 | that it is surely written back to a file. */ \ | |
1653 | coding->spec.iso2022.last_invalid_designation_register = -1; \ | |
1654 | goto label_invalid_code; \ | |
1655 | } \ | |
1656 | coding->spec.iso2022.last_invalid_designation_register = -1; \ | |
1657 | if ((coding->mode & CODING_MODE_DIRECTION) \ | |
1658 | && CHARSET_REVERSE_CHARSET (charset) >= 0) \ | |
1659 | charset = CHARSET_REVERSE_CHARSET (charset); \ | |
1660 | CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \ | |
1661 | } \ | |
1662 | else \ | |
1663 | { \ | |
1664 | coding->spec.iso2022.last_invalid_designation_register = reg; \ | |
1665 | goto label_invalid_code; \ | |
1666 | } \ | |
4ed46869 KH |
1667 | } while (0) |
1668 | ||
ec6d2bb8 KH |
1669 | /* Allocate a memory block for storing information about compositions. |
1670 | The block is chained to the already allocated blocks. */ | |
d46c5b12 | 1671 | |
33fb63eb | 1672 | void |
ec6d2bb8 | 1673 | coding_allocate_composition_data (coding, char_offset) |
d46c5b12 | 1674 | struct coding_system *coding; |
ec6d2bb8 | 1675 | int char_offset; |
d46c5b12 | 1676 | { |
ec6d2bb8 KH |
1677 | struct composition_data *cmp_data |
1678 | = (struct composition_data *) xmalloc (sizeof *cmp_data); | |
1679 | ||
1680 | cmp_data->char_offset = char_offset; | |
1681 | cmp_data->used = 0; | |
1682 | cmp_data->prev = coding->cmp_data; | |
1683 | cmp_data->next = NULL; | |
1684 | if (coding->cmp_data) | |
1685 | coding->cmp_data->next = cmp_data; | |
1686 | coding->cmp_data = cmp_data; | |
1687 | coding->cmp_data_start = 0; | |
1688 | } | |
d46c5b12 | 1689 | |
aa72b389 KH |
1690 | /* Handle composition start sequence ESC 0, ESC 2, ESC 3, or ESC 4. |
1691 | ESC 0 : relative composition : ESC 0 CHAR ... ESC 1 | |
1692 | ESC 2 : rulebase composition : ESC 2 CHAR RULE CHAR RULE ... CHAR ESC 1 | |
1693 | ESC 3 : altchar composition : ESC 3 ALT ... ESC 0 CHAR ... ESC 1 | |
1694 | ESC 4 : alt&rule composition : ESC 4 ALT RULE .. ALT ESC 0 CHAR ... ESC 1 | |
1695 | */ | |
ec6d2bb8 | 1696 | |
33fb63eb KH |
1697 | #define DECODE_COMPOSITION_START(c1) \ |
1698 | do { \ | |
1699 | if (coding->composing == COMPOSITION_DISABLED) \ | |
1700 | { \ | |
1701 | *dst++ = ISO_CODE_ESC; \ | |
1702 | *dst++ = c1 & 0x7f; \ | |
1703 | coding->produced_char += 2; \ | |
1704 | } \ | |
1705 | else if (!COMPOSING_P (coding)) \ | |
1706 | { \ | |
1707 | /* This is surely the start of a composition. We must be sure \ | |
1708 | that coding->cmp_data has enough space to store the \ | |
1709 | information about the composition. If not, terminate the \ | |
1710 | current decoding loop, allocate one more memory block for \ | |
8ca3766a | 1711 | coding->cmp_data in the caller, then start the decoding \ |
33fb63eb KH |
1712 | loop again. We can't allocate memory here directly because \ |
1713 | it may cause buffer/string relocation. */ \ | |
1714 | if (!coding->cmp_data \ | |
1715 | || (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH \ | |
1716 | >= COMPOSITION_DATA_SIZE)) \ | |
1717 | { \ | |
1718 | coding->result = CODING_FINISH_INSUFFICIENT_CMP; \ | |
1719 | goto label_end_of_loop; \ | |
1720 | } \ | |
1721 | coding->composing = (c1 == '0' ? COMPOSITION_RELATIVE \ | |
1722 | : c1 == '2' ? COMPOSITION_WITH_RULE \ | |
1723 | : c1 == '3' ? COMPOSITION_WITH_ALTCHARS \ | |
1724 | : COMPOSITION_WITH_RULE_ALTCHARS); \ | |
1725 | CODING_ADD_COMPOSITION_START (coding, coding->produced_char, \ | |
1726 | coding->composing); \ | |
1727 | coding->composition_rule_follows = 0; \ | |
1728 | } \ | |
1729 | else \ | |
1730 | { \ | |
1731 | /* We are already handling a composition. If the method is \ | |
1732 | the following two, the codes following the current escape \ | |
1733 | sequence are actual characters stored in a buffer. */ \ | |
1734 | if (coding->composing == COMPOSITION_WITH_ALTCHARS \ | |
1735 | || coding->composing == COMPOSITION_WITH_RULE_ALTCHARS) \ | |
1736 | { \ | |
1737 | coding->composing = COMPOSITION_RELATIVE; \ | |
1738 | coding->composition_rule_follows = 0; \ | |
1739 | } \ | |
1740 | } \ | |
ec6d2bb8 KH |
1741 | } while (0) |
1742 | ||
8ca3766a | 1743 | /* Handle composition end sequence ESC 1. */ |
ec6d2bb8 KH |
1744 | |
1745 | #define DECODE_COMPOSITION_END(c1) \ | |
1746 | do { \ | |
93dec019 | 1747 | if (! COMPOSING_P (coding)) \ |
ec6d2bb8 KH |
1748 | { \ |
1749 | *dst++ = ISO_CODE_ESC; \ | |
1750 | *dst++ = c1; \ | |
1751 | coding->produced_char += 2; \ | |
1752 | } \ | |
1753 | else \ | |
1754 | { \ | |
1755 | CODING_ADD_COMPOSITION_END (coding, coding->produced_char); \ | |
1756 | coding->composing = COMPOSITION_NO; \ | |
1757 | } \ | |
1758 | } while (0) | |
1759 | ||
1760 | /* Decode a composition rule from the byte C1 (and maybe one more byte | |
1761 | from SRC) and store one encoded composition rule in | |
1762 | coding->cmp_data. */ | |
1763 | ||
1764 | #define DECODE_COMPOSITION_RULE(c1) \ | |
1765 | do { \ | |
1766 | int rule = 0; \ | |
1767 | (c1) -= 32; \ | |
1768 | if (c1 < 81) /* old format (before ver.21) */ \ | |
1769 | { \ | |
1770 | int gref = (c1) / 9; \ | |
1771 | int nref = (c1) % 9; \ | |
1772 | if (gref == 4) gref = 10; \ | |
1773 | if (nref == 4) nref = 10; \ | |
1774 | rule = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
1775 | } \ | |
b73bfc1c | 1776 | else if (c1 < 93) /* new format (after ver.21) */ \ |
ec6d2bb8 KH |
1777 | { \ |
1778 | ONE_MORE_BYTE (c2); \ | |
1779 | rule = COMPOSITION_ENCODE_RULE (c1 - 81, c2 - 32); \ | |
1780 | } \ | |
1781 | CODING_ADD_COMPOSITION_COMPONENT (coding, rule); \ | |
1782 | coding->composition_rule_follows = 0; \ | |
1783 | } while (0) | |
88993dfd | 1784 | |
d46c5b12 | 1785 | |
4ed46869 KH |
1786 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
1787 | ||
b73bfc1c | 1788 | static void |
d46c5b12 | 1789 | decode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
1790 | struct coding_system *coding; |
1791 | unsigned char *source, *destination; | |
1792 | int src_bytes, dst_bytes; | |
4ed46869 KH |
1793 | { |
1794 | unsigned char *src = source; | |
1795 | unsigned char *src_end = source + src_bytes; | |
1796 | unsigned char *dst = destination; | |
1797 | unsigned char *dst_end = destination + dst_bytes; | |
4ed46869 KH |
1798 | /* Charsets invoked to graphic plane 0 and 1 respectively. */ |
1799 | int charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
1800 | int charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
b73bfc1c KH |
1801 | /* SRC_BASE remembers the start position in source in each loop. |
1802 | The loop will be exited when there's not enough source code | |
1803 | (within macro ONE_MORE_BYTE), or when there's not enough | |
1804 | destination area to produce a character (within macro | |
1805 | EMIT_CHAR). */ | |
1806 | unsigned char *src_base; | |
1807 | int c, charset; | |
1808 | Lisp_Object translation_table; | |
05e6f5dc KH |
1809 | Lisp_Object safe_chars; |
1810 | ||
6b89e3aa | 1811 | safe_chars = coding_safe_chars (coding->symbol); |
bdd9fb48 | 1812 | |
b73bfc1c KH |
1813 | if (NILP (Venable_character_translation)) |
1814 | translation_table = Qnil; | |
1815 | else | |
1816 | { | |
1817 | translation_table = coding->translation_table_for_decode; | |
1818 | if (NILP (translation_table)) | |
1819 | translation_table = Vstandard_translation_table_for_decode; | |
1820 | } | |
4ed46869 | 1821 | |
b73bfc1c KH |
1822 | coding->result = CODING_FINISH_NORMAL; |
1823 | ||
1824 | while (1) | |
4ed46869 | 1825 | { |
85478bc6 | 1826 | int c1, c2 = 0; |
b73bfc1c KH |
1827 | |
1828 | src_base = src; | |
1829 | ONE_MORE_BYTE (c1); | |
4ed46869 | 1830 | |
ec6d2bb8 | 1831 | /* We produce no character or one character. */ |
4ed46869 KH |
1832 | switch (iso_code_class [c1]) |
1833 | { | |
1834 | case ISO_0x20_or_0x7F: | |
ec6d2bb8 KH |
1835 | if (COMPOSING_P (coding) && coding->composition_rule_follows) |
1836 | { | |
1837 | DECODE_COMPOSITION_RULE (c1); | |
b73bfc1c | 1838 | continue; |
ec6d2bb8 KH |
1839 | } |
1840 | if (charset0 < 0 || CHARSET_CHARS (charset0) == 94) | |
4ed46869 KH |
1841 | { |
1842 | /* This is SPACE or DEL. */ | |
b73bfc1c | 1843 | charset = CHARSET_ASCII; |
4ed46869 KH |
1844 | break; |
1845 | } | |
1846 | /* This is a graphic character, we fall down ... */ | |
1847 | ||
1848 | case ISO_graphic_plane_0: | |
ec6d2bb8 | 1849 | if (COMPOSING_P (coding) && coding->composition_rule_follows) |
b73bfc1c KH |
1850 | { |
1851 | DECODE_COMPOSITION_RULE (c1); | |
1852 | continue; | |
1853 | } | |
1854 | charset = charset0; | |
4ed46869 KH |
1855 | break; |
1856 | ||
1857 | case ISO_0xA0_or_0xFF: | |
d46c5b12 KH |
1858 | if (charset1 < 0 || CHARSET_CHARS (charset1) == 94 |
1859 | || coding->flags & CODING_FLAG_ISO_SEVEN_BITS) | |
fb88bf2d | 1860 | goto label_invalid_code; |
4ed46869 KH |
1861 | /* This is a graphic character, we fall down ... */ |
1862 | ||
1863 | case ISO_graphic_plane_1: | |
b73bfc1c | 1864 | if (charset1 < 0) |
fb88bf2d | 1865 | goto label_invalid_code; |
b73bfc1c | 1866 | charset = charset1; |
4ed46869 KH |
1867 | break; |
1868 | ||
b73bfc1c | 1869 | case ISO_control_0: |
ec6d2bb8 KH |
1870 | if (COMPOSING_P (coding)) |
1871 | DECODE_COMPOSITION_END ('1'); | |
1872 | ||
4ed46869 KH |
1873 | /* All ISO2022 control characters in this class have the |
1874 | same representation in Emacs internal format. */ | |
d46c5b12 KH |
1875 | if (c1 == '\n' |
1876 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
1877 | && (coding->eol_type == CODING_EOL_CR | |
1878 | || coding->eol_type == CODING_EOL_CRLF)) | |
1879 | { | |
b73bfc1c KH |
1880 | coding->result = CODING_FINISH_INCONSISTENT_EOL; |
1881 | goto label_end_of_loop; | |
d46c5b12 | 1882 | } |
b73bfc1c | 1883 | charset = CHARSET_ASCII; |
4ed46869 KH |
1884 | break; |
1885 | ||
b73bfc1c KH |
1886 | case ISO_control_1: |
1887 | if (COMPOSING_P (coding)) | |
1888 | DECODE_COMPOSITION_END ('1'); | |
1889 | goto label_invalid_code; | |
1890 | ||
4ed46869 | 1891 | case ISO_carriage_return: |
ec6d2bb8 KH |
1892 | if (COMPOSING_P (coding)) |
1893 | DECODE_COMPOSITION_END ('1'); | |
1894 | ||
4ed46869 | 1895 | if (coding->eol_type == CODING_EOL_CR) |
b73bfc1c | 1896 | c1 = '\n'; |
4ed46869 KH |
1897 | else if (coding->eol_type == CODING_EOL_CRLF) |
1898 | { | |
1899 | ONE_MORE_BYTE (c1); | |
b73bfc1c | 1900 | if (c1 != ISO_CODE_LF) |
4ed46869 KH |
1901 | { |
1902 | src--; | |
b73bfc1c | 1903 | c1 = '\r'; |
4ed46869 KH |
1904 | } |
1905 | } | |
b73bfc1c | 1906 | charset = CHARSET_ASCII; |
4ed46869 KH |
1907 | break; |
1908 | ||
1909 | case ISO_shift_out: | |
d46c5b12 KH |
1910 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1911 | || CODING_SPEC_ISO_DESIGNATION (coding, 1) < 0) | |
1912 | goto label_invalid_code; | |
4ed46869 KH |
1913 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 1; |
1914 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
b73bfc1c | 1915 | continue; |
4ed46869 KH |
1916 | |
1917 | case ISO_shift_in: | |
d46c5b12 KH |
1918 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)) |
1919 | goto label_invalid_code; | |
4ed46869 KH |
1920 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; |
1921 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
b73bfc1c | 1922 | continue; |
4ed46869 KH |
1923 | |
1924 | case ISO_single_shift_2_7: | |
1925 | case ISO_single_shift_2: | |
d46c5b12 KH |
1926 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
1927 | goto label_invalid_code; | |
4ed46869 KH |
1928 | /* SS2 is handled as an escape sequence of ESC 'N' */ |
1929 | c1 = 'N'; | |
1930 | goto label_escape_sequence; | |
1931 | ||
1932 | case ISO_single_shift_3: | |
d46c5b12 KH |
1933 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
1934 | goto label_invalid_code; | |
4ed46869 KH |
1935 | /* SS2 is handled as an escape sequence of ESC 'O' */ |
1936 | c1 = 'O'; | |
1937 | goto label_escape_sequence; | |
1938 | ||
1939 | case ISO_control_sequence_introducer: | |
1940 | /* CSI is handled as an escape sequence of ESC '[' ... */ | |
1941 | c1 = '['; | |
1942 | goto label_escape_sequence; | |
1943 | ||
1944 | case ISO_escape: | |
1945 | ONE_MORE_BYTE (c1); | |
1946 | label_escape_sequence: | |
1947 | /* Escape sequences handled by Emacs are invocation, | |
1948 | designation, direction specification, and character | |
1949 | composition specification. */ | |
1950 | switch (c1) | |
1951 | { | |
1952 | case '&': /* revision of following character set */ | |
1953 | ONE_MORE_BYTE (c1); | |
1954 | if (!(c1 >= '@' && c1 <= '~')) | |
d46c5b12 | 1955 | goto label_invalid_code; |
4ed46869 KH |
1956 | ONE_MORE_BYTE (c1); |
1957 | if (c1 != ISO_CODE_ESC) | |
d46c5b12 | 1958 | goto label_invalid_code; |
4ed46869 KH |
1959 | ONE_MORE_BYTE (c1); |
1960 | goto label_escape_sequence; | |
1961 | ||
1962 | case '$': /* designation of 2-byte character set */ | |
d46c5b12 KH |
1963 | if (! (coding->flags & CODING_FLAG_ISO_DESIGNATION)) |
1964 | goto label_invalid_code; | |
4ed46869 KH |
1965 | ONE_MORE_BYTE (c1); |
1966 | if (c1 >= '@' && c1 <= 'B') | |
1967 | { /* designation of JISX0208.1978, GB2312.1980, | |
88993dfd | 1968 | or JISX0208.1980 */ |
4ed46869 KH |
1969 | DECODE_DESIGNATION (0, 2, 94, c1); |
1970 | } | |
1971 | else if (c1 >= 0x28 && c1 <= 0x2B) | |
1972 | { /* designation of DIMENSION2_CHARS94 character set */ | |
1973 | ONE_MORE_BYTE (c2); | |
1974 | DECODE_DESIGNATION (c1 - 0x28, 2, 94, c2); | |
1975 | } | |
1976 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
1977 | { /* designation of DIMENSION2_CHARS96 character set */ | |
1978 | ONE_MORE_BYTE (c2); | |
1979 | DECODE_DESIGNATION (c1 - 0x2C, 2, 96, c2); | |
1980 | } | |
1981 | else | |
d46c5b12 | 1982 | goto label_invalid_code; |
b73bfc1c KH |
1983 | /* We must update these variables now. */ |
1984 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
1985 | charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
1986 | continue; | |
4ed46869 KH |
1987 | |
1988 | case 'n': /* invocation of locking-shift-2 */ | |
d46c5b12 KH |
1989 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1990 | || CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0) | |
1991 | goto label_invalid_code; | |
4ed46869 | 1992 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 2; |
e0e989f6 | 1993 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); |
b73bfc1c | 1994 | continue; |
4ed46869 KH |
1995 | |
1996 | case 'o': /* invocation of locking-shift-3 */ | |
d46c5b12 KH |
1997 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1998 | || CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0) | |
1999 | goto label_invalid_code; | |
4ed46869 | 2000 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 3; |
e0e989f6 | 2001 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); |
b73bfc1c | 2002 | continue; |
4ed46869 KH |
2003 | |
2004 | case 'N': /* invocation of single-shift-2 */ | |
d46c5b12 KH |
2005 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) |
2006 | || CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0) | |
2007 | goto label_invalid_code; | |
4ed46869 | 2008 | charset = CODING_SPEC_ISO_DESIGNATION (coding, 2); |
b73bfc1c | 2009 | ONE_MORE_BYTE (c1); |
e7046a18 KH |
2010 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
2011 | goto label_invalid_code; | |
4ed46869 KH |
2012 | break; |
2013 | ||
2014 | case 'O': /* invocation of single-shift-3 */ | |
d46c5b12 KH |
2015 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) |
2016 | || CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0) | |
2017 | goto label_invalid_code; | |
4ed46869 | 2018 | charset = CODING_SPEC_ISO_DESIGNATION (coding, 3); |
b73bfc1c | 2019 | ONE_MORE_BYTE (c1); |
e7046a18 KH |
2020 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
2021 | goto label_invalid_code; | |
4ed46869 KH |
2022 | break; |
2023 | ||
ec6d2bb8 KH |
2024 | case '0': case '2': case '3': case '4': /* start composition */ |
2025 | DECODE_COMPOSITION_START (c1); | |
b73bfc1c | 2026 | continue; |
4ed46869 | 2027 | |
ec6d2bb8 KH |
2028 | case '1': /* end composition */ |
2029 | DECODE_COMPOSITION_END (c1); | |
b73bfc1c | 2030 | continue; |
4ed46869 KH |
2031 | |
2032 | case '[': /* specification of direction */ | |
d46c5b12 KH |
2033 | if (coding->flags & CODING_FLAG_ISO_NO_DIRECTION) |
2034 | goto label_invalid_code; | |
4ed46869 | 2035 | /* For the moment, nested direction is not supported. |
d46c5b12 | 2036 | So, `coding->mode & CODING_MODE_DIRECTION' zero means |
8ca3766a | 2037 | left-to-right, and nonzero means right-to-left. */ |
4ed46869 KH |
2038 | ONE_MORE_BYTE (c1); |
2039 | switch (c1) | |
2040 | { | |
2041 | case ']': /* end of the current direction */ | |
d46c5b12 | 2042 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 KH |
2043 | |
2044 | case '0': /* end of the current direction */ | |
2045 | case '1': /* start of left-to-right direction */ | |
2046 | ONE_MORE_BYTE (c1); | |
2047 | if (c1 == ']') | |
d46c5b12 | 2048 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 | 2049 | else |
d46c5b12 | 2050 | goto label_invalid_code; |
4ed46869 KH |
2051 | break; |
2052 | ||
2053 | case '2': /* start of right-to-left direction */ | |
2054 | ONE_MORE_BYTE (c1); | |
2055 | if (c1 == ']') | |
d46c5b12 | 2056 | coding->mode |= CODING_MODE_DIRECTION; |
4ed46869 | 2057 | else |
d46c5b12 | 2058 | goto label_invalid_code; |
4ed46869 KH |
2059 | break; |
2060 | ||
2061 | default: | |
d46c5b12 | 2062 | goto label_invalid_code; |
4ed46869 | 2063 | } |
b73bfc1c | 2064 | continue; |
4ed46869 | 2065 | |
103e0180 KH |
2066 | case '%': |
2067 | if (COMPOSING_P (coding)) | |
2068 | DECODE_COMPOSITION_END ('1'); | |
2069 | ONE_MORE_BYTE (c1); | |
2070 | if (c1 == '/') | |
2071 | { | |
2072 | /* CTEXT extended segment: | |
2073 | ESC % / [0-4] M L --ENCODING-NAME-- \002 --BYTES-- | |
2074 | We keep these bytes as is for the moment. | |
2075 | They may be decoded by post-read-conversion. */ | |
2076 | int dim, M, L; | |
2077 | int size, required; | |
2078 | int produced_chars; | |
2079 | ||
2080 | ONE_MORE_BYTE (dim); | |
2081 | ONE_MORE_BYTE (M); | |
2082 | ONE_MORE_BYTE (L); | |
2083 | size = ((M - 128) * 128) + (L - 128); | |
2084 | required = 8 + size * 2; | |
2085 | if (dst + required > (dst_bytes ? dst_end : src)) | |
2086 | goto label_end_of_loop; | |
2087 | *dst++ = ISO_CODE_ESC; | |
2088 | *dst++ = '%'; | |
2089 | *dst++ = '/'; | |
2090 | *dst++ = dim; | |
2091 | produced_chars = 4; | |
2092 | dst += CHAR_STRING (M, dst), produced_chars++; | |
2093 | dst += CHAR_STRING (L, dst), produced_chars++; | |
2094 | while (size-- > 0) | |
2095 | { | |
2096 | ONE_MORE_BYTE (c1); | |
2097 | dst += CHAR_STRING (c1, dst), produced_chars++; | |
2098 | } | |
2099 | coding->produced_char += produced_chars; | |
2100 | } | |
2101 | else if (c1 == 'G') | |
2102 | { | |
2103 | unsigned char *d = dst; | |
2104 | int produced_chars; | |
2105 | ||
2106 | /* XFree86 extension for embedding UTF-8 in CTEXT: | |
2107 | ESC % G --UTF-8-BYTES-- ESC % @ | |
2108 | We keep these bytes as is for the moment. | |
2109 | They may be decoded by post-read-conversion. */ | |
2110 | if (d + 6 > (dst_bytes ? dst_end : src)) | |
2111 | goto label_end_of_loop; | |
2112 | *d++ = ISO_CODE_ESC; | |
2113 | *d++ = '%'; | |
2114 | *d++ = 'G'; | |
2115 | produced_chars = 3; | |
2116 | while (d + 1 < (dst_bytes ? dst_end : src)) | |
2117 | { | |
2118 | ONE_MORE_BYTE (c1); | |
2119 | if (c1 == ISO_CODE_ESC | |
2120 | && src + 1 < src_end | |
2121 | && src[0] == '%' | |
2122 | && src[1] == '@') | |
2123 | break; | |
2124 | d += CHAR_STRING (c1, d), produced_chars++; | |
2125 | } | |
2126 | if (d + 3 > (dst_bytes ? dst_end : src)) | |
2127 | goto label_end_of_loop; | |
2128 | *d++ = ISO_CODE_ESC; | |
2129 | *d++ = '%'; | |
2130 | *d++ = '@'; | |
2131 | dst = d; | |
2132 | coding->produced_char += produced_chars + 3; | |
2133 | } | |
2134 | else | |
2135 | goto label_invalid_code; | |
2136 | continue; | |
2137 | ||
4ed46869 | 2138 | default: |
d46c5b12 KH |
2139 | if (! (coding->flags & CODING_FLAG_ISO_DESIGNATION)) |
2140 | goto label_invalid_code; | |
4ed46869 KH |
2141 | if (c1 >= 0x28 && c1 <= 0x2B) |
2142 | { /* designation of DIMENSION1_CHARS94 character set */ | |
2143 | ONE_MORE_BYTE (c2); | |
2144 | DECODE_DESIGNATION (c1 - 0x28, 1, 94, c2); | |
2145 | } | |
2146 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
2147 | { /* designation of DIMENSION1_CHARS96 character set */ | |
2148 | ONE_MORE_BYTE (c2); | |
2149 | DECODE_DESIGNATION (c1 - 0x2C, 1, 96, c2); | |
2150 | } | |
2151 | else | |
b73bfc1c KH |
2152 | goto label_invalid_code; |
2153 | /* We must update these variables now. */ | |
2154 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
2155 | charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
2156 | continue; | |
4ed46869 | 2157 | } |
b73bfc1c | 2158 | } |
4ed46869 | 2159 | |
b73bfc1c KH |
2160 | /* Now we know CHARSET and 1st position code C1 of a character. |
2161 | Produce a multibyte sequence for that character while getting | |
2162 | 2nd position code C2 if necessary. */ | |
2163 | if (CHARSET_DIMENSION (charset) == 2) | |
2164 | { | |
2165 | ONE_MORE_BYTE (c2); | |
2166 | if (c1 < 0x80 ? c2 < 0x20 || c2 >= 0x80 : c2 < 0xA0) | |
2167 | /* C2 is not in a valid range. */ | |
2168 | goto label_invalid_code; | |
4ed46869 | 2169 | } |
b73bfc1c KH |
2170 | c = DECODE_ISO_CHARACTER (charset, c1, c2); |
2171 | EMIT_CHAR (c); | |
4ed46869 KH |
2172 | continue; |
2173 | ||
b73bfc1c KH |
2174 | label_invalid_code: |
2175 | coding->errors++; | |
2176 | if (COMPOSING_P (coding)) | |
2177 | DECODE_COMPOSITION_END ('1'); | |
4ed46869 | 2178 | src = src_base; |
b73bfc1c KH |
2179 | c = *src++; |
2180 | EMIT_CHAR (c); | |
4ed46869 | 2181 | } |
fb88bf2d | 2182 | |
b73bfc1c KH |
2183 | label_end_of_loop: |
2184 | coding->consumed = coding->consumed_char = src_base - source; | |
d46c5b12 | 2185 | coding->produced = dst - destination; |
b73bfc1c | 2186 | return; |
4ed46869 KH |
2187 | } |
2188 | ||
b73bfc1c | 2189 | |
f4dee582 | 2190 | /* ISO2022 encoding stuff. */ |
4ed46869 KH |
2191 | |
2192 | /* | |
f4dee582 | 2193 | It is not enough to say just "ISO2022" on encoding, we have to |
cfb43547 | 2194 | specify more details. In Emacs, each ISO2022 coding system |
4ed46869 | 2195 | variant has the following specifications: |
8ca3766a | 2196 | 1. Initial designation to G0 through G3. |
4ed46869 KH |
2197 | 2. Allows short-form designation? |
2198 | 3. ASCII should be designated to G0 before control characters? | |
2199 | 4. ASCII should be designated to G0 at end of line? | |
2200 | 5. 7-bit environment or 8-bit environment? | |
2201 | 6. Use locking-shift? | |
2202 | 7. Use Single-shift? | |
2203 | And the following two are only for Japanese: | |
2204 | 8. Use ASCII in place of JIS0201-1976-Roman? | |
2205 | 9. Use JISX0208-1983 in place of JISX0208-1978? | |
2206 | These specifications are encoded in `coding->flags' as flag bits | |
2207 | defined by macros CODING_FLAG_ISO_XXX. See `coding.h' for more | |
f4dee582 | 2208 | details. |
4ed46869 KH |
2209 | */ |
2210 | ||
2211 | /* Produce codes (escape sequence) for designating CHARSET to graphic | |
b73bfc1c KH |
2212 | register REG at DST, and increment DST. If <final-char> of CHARSET is |
2213 | '@', 'A', or 'B' and the coding system CODING allows, produce | |
2214 | designation sequence of short-form. */ | |
4ed46869 KH |
2215 | |
2216 | #define ENCODE_DESIGNATION(charset, reg, coding) \ | |
2217 | do { \ | |
2218 | unsigned char final_char = CHARSET_ISO_FINAL_CHAR (charset); \ | |
2219 | char *intermediate_char_94 = "()*+"; \ | |
2220 | char *intermediate_char_96 = ",-./"; \ | |
70c22245 | 2221 | int revision = CODING_SPEC_ISO_REVISION_NUMBER(coding, charset); \ |
b73bfc1c | 2222 | \ |
70c22245 KH |
2223 | if (revision < 255) \ |
2224 | { \ | |
4ed46869 KH |
2225 | *dst++ = ISO_CODE_ESC; \ |
2226 | *dst++ = '&'; \ | |
70c22245 | 2227 | *dst++ = '@' + revision; \ |
4ed46869 | 2228 | } \ |
b73bfc1c | 2229 | *dst++ = ISO_CODE_ESC; \ |
4ed46869 KH |
2230 | if (CHARSET_DIMENSION (charset) == 1) \ |
2231 | { \ | |
2232 | if (CHARSET_CHARS (charset) == 94) \ | |
2233 | *dst++ = (unsigned char) (intermediate_char_94[reg]); \ | |
2234 | else \ | |
2235 | *dst++ = (unsigned char) (intermediate_char_96[reg]); \ | |
2236 | } \ | |
2237 | else \ | |
2238 | { \ | |
2239 | *dst++ = '$'; \ | |
2240 | if (CHARSET_CHARS (charset) == 94) \ | |
2241 | { \ | |
b73bfc1c KH |
2242 | if (! (coding->flags & CODING_FLAG_ISO_SHORT_FORM) \ |
2243 | || reg != 0 \ | |
2244 | || final_char < '@' || final_char > 'B') \ | |
4ed46869 KH |
2245 | *dst++ = (unsigned char) (intermediate_char_94[reg]); \ |
2246 | } \ | |
2247 | else \ | |
b73bfc1c | 2248 | *dst++ = (unsigned char) (intermediate_char_96[reg]); \ |
4ed46869 | 2249 | } \ |
b73bfc1c | 2250 | *dst++ = final_char; \ |
4ed46869 KH |
2251 | CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \ |
2252 | } while (0) | |
2253 | ||
2254 | /* The following two macros produce codes (control character or escape | |
2255 | sequence) for ISO2022 single-shift functions (single-shift-2 and | |
2256 | single-shift-3). */ | |
2257 | ||
2258 | #define ENCODE_SINGLE_SHIFT_2 \ | |
2259 | do { \ | |
2260 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2261 | *dst++ = ISO_CODE_ESC, *dst++ = 'N'; \ | |
2262 | else \ | |
b73bfc1c | 2263 | *dst++ = ISO_CODE_SS2; \ |
4ed46869 KH |
2264 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 1; \ |
2265 | } while (0) | |
2266 | ||
fb88bf2d KH |
2267 | #define ENCODE_SINGLE_SHIFT_3 \ |
2268 | do { \ | |
4ed46869 | 2269 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ |
fb88bf2d KH |
2270 | *dst++ = ISO_CODE_ESC, *dst++ = 'O'; \ |
2271 | else \ | |
b73bfc1c | 2272 | *dst++ = ISO_CODE_SS3; \ |
4ed46869 KH |
2273 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 1; \ |
2274 | } while (0) | |
2275 | ||
2276 | /* The following four macros produce codes (control character or | |
2277 | escape sequence) for ISO2022 locking-shift functions (shift-in, | |
2278 | shift-out, locking-shift-2, and locking-shift-3). */ | |
2279 | ||
b73bfc1c KH |
2280 | #define ENCODE_SHIFT_IN \ |
2281 | do { \ | |
2282 | *dst++ = ISO_CODE_SI; \ | |
4ed46869 KH |
2283 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; \ |
2284 | } while (0) | |
2285 | ||
b73bfc1c KH |
2286 | #define ENCODE_SHIFT_OUT \ |
2287 | do { \ | |
2288 | *dst++ = ISO_CODE_SO; \ | |
4ed46869 KH |
2289 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 1; \ |
2290 | } while (0) | |
2291 | ||
2292 | #define ENCODE_LOCKING_SHIFT_2 \ | |
2293 | do { \ | |
2294 | *dst++ = ISO_CODE_ESC, *dst++ = 'n'; \ | |
2295 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 2; \ | |
2296 | } while (0) | |
2297 | ||
b73bfc1c KH |
2298 | #define ENCODE_LOCKING_SHIFT_3 \ |
2299 | do { \ | |
2300 | *dst++ = ISO_CODE_ESC, *dst++ = 'o'; \ | |
4ed46869 KH |
2301 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 3; \ |
2302 | } while (0) | |
2303 | ||
f4dee582 RS |
2304 | /* Produce codes for a DIMENSION1 character whose character set is |
2305 | CHARSET and whose position-code is C1. Designation and invocation | |
4ed46869 KH |
2306 | sequences are also produced in advance if necessary. */ |
2307 | ||
6e85d753 KH |
2308 | #define ENCODE_ISO_CHARACTER_DIMENSION1(charset, c1) \ |
2309 | do { \ | |
2310 | if (CODING_SPEC_ISO_SINGLE_SHIFTING (coding)) \ | |
2311 | { \ | |
2312 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2313 | *dst++ = c1 & 0x7F; \ | |
2314 | else \ | |
2315 | *dst++ = c1 | 0x80; \ | |
2316 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
2317 | break; \ | |
2318 | } \ | |
2319 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 0)) \ | |
2320 | { \ | |
2321 | *dst++ = c1 & 0x7F; \ | |
2322 | break; \ | |
2323 | } \ | |
2324 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 1)) \ | |
2325 | { \ | |
2326 | *dst++ = c1 | 0x80; \ | |
2327 | break; \ | |
2328 | } \ | |
6e85d753 KH |
2329 | else \ |
2330 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
2331 | must invoke it, or, at first, designate it to some graphic \ | |
2332 | register. Then repeat the loop to actually produce the \ | |
2333 | character. */ \ | |
2334 | dst = encode_invocation_designation (charset, coding, dst); \ | |
4ed46869 KH |
2335 | } while (1) |
2336 | ||
f4dee582 RS |
2337 | /* Produce codes for a DIMENSION2 character whose character set is |
2338 | CHARSET and whose position-codes are C1 and C2. Designation and | |
4ed46869 KH |
2339 | invocation codes are also produced in advance if necessary. */ |
2340 | ||
6e85d753 KH |
2341 | #define ENCODE_ISO_CHARACTER_DIMENSION2(charset, c1, c2) \ |
2342 | do { \ | |
2343 | if (CODING_SPEC_ISO_SINGLE_SHIFTING (coding)) \ | |
2344 | { \ | |
2345 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2346 | *dst++ = c1 & 0x7F, *dst++ = c2 & 0x7F; \ | |
2347 | else \ | |
2348 | *dst++ = c1 | 0x80, *dst++ = c2 | 0x80; \ | |
2349 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
2350 | break; \ | |
2351 | } \ | |
2352 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 0)) \ | |
2353 | { \ | |
2354 | *dst++ = c1 & 0x7F, *dst++= c2 & 0x7F; \ | |
2355 | break; \ | |
2356 | } \ | |
2357 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 1)) \ | |
2358 | { \ | |
2359 | *dst++ = c1 | 0x80, *dst++= c2 | 0x80; \ | |
2360 | break; \ | |
2361 | } \ | |
6e85d753 KH |
2362 | else \ |
2363 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
2364 | must invoke it, or, at first, designate it to some graphic \ | |
2365 | register. Then repeat the loop to actually produce the \ | |
2366 | character. */ \ | |
2367 | dst = encode_invocation_designation (charset, coding, dst); \ | |
4ed46869 KH |
2368 | } while (1) |
2369 | ||
05e6f5dc KH |
2370 | #define ENCODE_ISO_CHARACTER(c) \ |
2371 | do { \ | |
2372 | int charset, c1, c2; \ | |
2373 | \ | |
2374 | SPLIT_CHAR (c, charset, c1, c2); \ | |
2375 | if (CHARSET_DEFINED_P (charset)) \ | |
2376 | { \ | |
2377 | if (CHARSET_DIMENSION (charset) == 1) \ | |
2378 | { \ | |
2379 | if (charset == CHARSET_ASCII \ | |
2380 | && coding->flags & CODING_FLAG_ISO_USE_ROMAN) \ | |
2381 | charset = charset_latin_jisx0201; \ | |
2382 | ENCODE_ISO_CHARACTER_DIMENSION1 (charset, c1); \ | |
2383 | } \ | |
2384 | else \ | |
2385 | { \ | |
2386 | if (charset == charset_jisx0208 \ | |
2387 | && coding->flags & CODING_FLAG_ISO_USE_OLDJIS) \ | |
2388 | charset = charset_jisx0208_1978; \ | |
2389 | ENCODE_ISO_CHARACTER_DIMENSION2 (charset, c1, c2); \ | |
2390 | } \ | |
2391 | } \ | |
2392 | else \ | |
2393 | { \ | |
2394 | *dst++ = c1; \ | |
2395 | if (c2 >= 0) \ | |
2396 | *dst++ = c2; \ | |
2397 | } \ | |
2398 | } while (0) | |
2399 | ||
2400 | ||
2401 | /* Instead of encoding character C, produce one or two `?'s. */ | |
2402 | ||
0eecad43 KH |
2403 | #define ENCODE_UNSAFE_CHARACTER(c) \ |
2404 | do { \ | |
2405 | ENCODE_ISO_CHARACTER (CODING_REPLACEMENT_CHARACTER); \ | |
2406 | if (CHARSET_WIDTH (CHAR_CHARSET (c)) > 1) \ | |
2407 | ENCODE_ISO_CHARACTER (CODING_REPLACEMENT_CHARACTER); \ | |
84fbb8a0 | 2408 | } while (0) |
bdd9fb48 | 2409 | |
05e6f5dc | 2410 | |
4ed46869 KH |
2411 | /* Produce designation and invocation codes at a place pointed by DST |
2412 | to use CHARSET. The element `spec.iso2022' of *CODING is updated. | |
2413 | Return new DST. */ | |
2414 | ||
2415 | unsigned char * | |
2416 | encode_invocation_designation (charset, coding, dst) | |
2417 | int charset; | |
2418 | struct coding_system *coding; | |
2419 | unsigned char *dst; | |
2420 | { | |
2421 | int reg; /* graphic register number */ | |
2422 | ||
2423 | /* At first, check designations. */ | |
2424 | for (reg = 0; reg < 4; reg++) | |
2425 | if (charset == CODING_SPEC_ISO_DESIGNATION (coding, reg)) | |
2426 | break; | |
2427 | ||
2428 | if (reg >= 4) | |
2429 | { | |
2430 | /* CHARSET is not yet designated to any graphic registers. */ | |
2431 | /* At first check the requested designation. */ | |
2432 | reg = CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset); | |
1ba9e4ab KH |
2433 | if (reg == CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION) |
2434 | /* Since CHARSET requests no special designation, designate it | |
2435 | to graphic register 0. */ | |
4ed46869 KH |
2436 | reg = 0; |
2437 | ||
2438 | ENCODE_DESIGNATION (charset, reg, coding); | |
2439 | } | |
2440 | ||
2441 | if (CODING_SPEC_ISO_INVOCATION (coding, 0) != reg | |
2442 | && CODING_SPEC_ISO_INVOCATION (coding, 1) != reg) | |
2443 | { | |
2444 | /* Since the graphic register REG is not invoked to any graphic | |
2445 | planes, invoke it to graphic plane 0. */ | |
2446 | switch (reg) | |
2447 | { | |
2448 | case 0: /* graphic register 0 */ | |
2449 | ENCODE_SHIFT_IN; | |
2450 | break; | |
2451 | ||
2452 | case 1: /* graphic register 1 */ | |
2453 | ENCODE_SHIFT_OUT; | |
2454 | break; | |
2455 | ||
2456 | case 2: /* graphic register 2 */ | |
2457 | if (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) | |
2458 | ENCODE_SINGLE_SHIFT_2; | |
2459 | else | |
2460 | ENCODE_LOCKING_SHIFT_2; | |
2461 | break; | |
2462 | ||
2463 | case 3: /* graphic register 3 */ | |
2464 | if (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) | |
2465 | ENCODE_SINGLE_SHIFT_3; | |
2466 | else | |
2467 | ENCODE_LOCKING_SHIFT_3; | |
2468 | break; | |
2469 | } | |
2470 | } | |
b73bfc1c | 2471 | |
4ed46869 KH |
2472 | return dst; |
2473 | } | |
2474 | ||
ec6d2bb8 KH |
2475 | /* Produce 2-byte codes for encoded composition rule RULE. */ |
2476 | ||
2477 | #define ENCODE_COMPOSITION_RULE(rule) \ | |
2478 | do { \ | |
2479 | int gref, nref; \ | |
2480 | COMPOSITION_DECODE_RULE (rule, gref, nref); \ | |
2481 | *dst++ = 32 + 81 + gref; \ | |
2482 | *dst++ = 32 + nref; \ | |
2483 | } while (0) | |
2484 | ||
2485 | /* Produce codes for indicating the start of a composition sequence | |
2486 | (ESC 0, ESC 3, or ESC 4). DATA points to an array of integers | |
2487 | which specify information about the composition. See the comment | |
2488 | in coding.h for the format of DATA. */ | |
2489 | ||
2490 | #define ENCODE_COMPOSITION_START(coding, data) \ | |
2491 | do { \ | |
2492 | coding->composing = data[3]; \ | |
2493 | *dst++ = ISO_CODE_ESC; \ | |
2494 | if (coding->composing == COMPOSITION_RELATIVE) \ | |
2495 | *dst++ = '0'; \ | |
2496 | else \ | |
2497 | { \ | |
2498 | *dst++ = (coding->composing == COMPOSITION_WITH_ALTCHARS \ | |
2499 | ? '3' : '4'); \ | |
2500 | coding->cmp_data_index = coding->cmp_data_start + 4; \ | |
2501 | coding->composition_rule_follows = 0; \ | |
2502 | } \ | |
2503 | } while (0) | |
2504 | ||
2505 | /* Produce codes for indicating the end of the current composition. */ | |
2506 | ||
2507 | #define ENCODE_COMPOSITION_END(coding, data) \ | |
2508 | do { \ | |
2509 | *dst++ = ISO_CODE_ESC; \ | |
2510 | *dst++ = '1'; \ | |
2511 | coding->cmp_data_start += data[0]; \ | |
2512 | coding->composing = COMPOSITION_NO; \ | |
2513 | if (coding->cmp_data_start == coding->cmp_data->used \ | |
2514 | && coding->cmp_data->next) \ | |
2515 | { \ | |
2516 | coding->cmp_data = coding->cmp_data->next; \ | |
2517 | coding->cmp_data_start = 0; \ | |
2518 | } \ | |
2519 | } while (0) | |
2520 | ||
2521 | /* Produce composition start sequence ESC 0. Here, this sequence | |
2522 | doesn't mean the start of a new composition but means that we have | |
2523 | just produced components (alternate chars and composition rules) of | |
2524 | the composition and the actual text follows in SRC. */ | |
2525 | ||
2526 | #define ENCODE_COMPOSITION_FAKE_START(coding) \ | |
2527 | do { \ | |
2528 | *dst++ = ISO_CODE_ESC; \ | |
2529 | *dst++ = '0'; \ | |
2530 | coding->composing = COMPOSITION_RELATIVE; \ | |
2531 | } while (0) | |
4ed46869 KH |
2532 | |
2533 | /* The following three macros produce codes for indicating direction | |
2534 | of text. */ | |
b73bfc1c KH |
2535 | #define ENCODE_CONTROL_SEQUENCE_INTRODUCER \ |
2536 | do { \ | |
4ed46869 | 2537 | if (coding->flags == CODING_FLAG_ISO_SEVEN_BITS) \ |
b73bfc1c KH |
2538 | *dst++ = ISO_CODE_ESC, *dst++ = '['; \ |
2539 | else \ | |
2540 | *dst++ = ISO_CODE_CSI; \ | |
4ed46869 KH |
2541 | } while (0) |
2542 | ||
2543 | #define ENCODE_DIRECTION_R2L \ | |
b73bfc1c | 2544 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst), *dst++ = '2', *dst++ = ']' |
4ed46869 KH |
2545 | |
2546 | #define ENCODE_DIRECTION_L2R \ | |
b73bfc1c | 2547 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst), *dst++ = '0', *dst++ = ']' |
4ed46869 KH |
2548 | |
2549 | /* Produce codes for designation and invocation to reset the graphic | |
2550 | planes and registers to initial state. */ | |
e0e989f6 KH |
2551 | #define ENCODE_RESET_PLANE_AND_REGISTER \ |
2552 | do { \ | |
2553 | int reg; \ | |
2554 | if (CODING_SPEC_ISO_INVOCATION (coding, 0) != 0) \ | |
2555 | ENCODE_SHIFT_IN; \ | |
2556 | for (reg = 0; reg < 4; reg++) \ | |
2557 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg) >= 0 \ | |
2558 | && (CODING_SPEC_ISO_DESIGNATION (coding, reg) \ | |
2559 | != CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg))) \ | |
2560 | ENCODE_DESIGNATION \ | |
2561 | (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg), reg, coding); \ | |
4ed46869 KH |
2562 | } while (0) |
2563 | ||
bdd9fb48 | 2564 | /* Produce designation sequences of charsets in the line started from |
b73bfc1c | 2565 | SRC to a place pointed by DST, and return updated DST. |
bdd9fb48 KH |
2566 | |
2567 | If the current block ends before any end-of-line, we may fail to | |
d46c5b12 KH |
2568 | find all the necessary designations. */ |
2569 | ||
b73bfc1c KH |
2570 | static unsigned char * |
2571 | encode_designation_at_bol (coding, translation_table, src, src_end, dst) | |
e0e989f6 | 2572 | struct coding_system *coding; |
b73bfc1c KH |
2573 | Lisp_Object translation_table; |
2574 | unsigned char *src, *src_end, *dst; | |
e0e989f6 | 2575 | { |
bdd9fb48 KH |
2576 | int charset, c, found = 0, reg; |
2577 | /* Table of charsets to be designated to each graphic register. */ | |
2578 | int r[4]; | |
bdd9fb48 KH |
2579 | |
2580 | for (reg = 0; reg < 4; reg++) | |
2581 | r[reg] = -1; | |
2582 | ||
b73bfc1c | 2583 | while (found < 4) |
e0e989f6 | 2584 | { |
b73bfc1c KH |
2585 | ONE_MORE_CHAR (c); |
2586 | if (c == '\n') | |
2587 | break; | |
93dec019 | 2588 | |
b73bfc1c | 2589 | charset = CHAR_CHARSET (c); |
e0e989f6 | 2590 | reg = CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset); |
d46c5b12 | 2591 | if (reg != CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION && r[reg] < 0) |
bdd9fb48 KH |
2592 | { |
2593 | found++; | |
2594 | r[reg] = charset; | |
2595 | } | |
bdd9fb48 KH |
2596 | } |
2597 | ||
b73bfc1c | 2598 | label_end_of_loop: |
bdd9fb48 KH |
2599 | if (found) |
2600 | { | |
2601 | for (reg = 0; reg < 4; reg++) | |
2602 | if (r[reg] >= 0 | |
2603 | && CODING_SPEC_ISO_DESIGNATION (coding, reg) != r[reg]) | |
2604 | ENCODE_DESIGNATION (r[reg], reg, coding); | |
e0e989f6 | 2605 | } |
b73bfc1c KH |
2606 | |
2607 | return dst; | |
e0e989f6 KH |
2608 | } |
2609 | ||
4ed46869 KH |
2610 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */ |
2611 | ||
b73bfc1c | 2612 | static void |
d46c5b12 | 2613 | encode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
2614 | struct coding_system *coding; |
2615 | unsigned char *source, *destination; | |
2616 | int src_bytes, dst_bytes; | |
4ed46869 KH |
2617 | { |
2618 | unsigned char *src = source; | |
2619 | unsigned char *src_end = source + src_bytes; | |
2620 | unsigned char *dst = destination; | |
2621 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c | 2622 | /* Since the maximum bytes produced by each loop is 20, we subtract 19 |
4ed46869 KH |
2623 | from DST_END to assure overflow checking is necessary only at the |
2624 | head of loop. */ | |
b73bfc1c KH |
2625 | unsigned char *adjusted_dst_end = dst_end - 19; |
2626 | /* SRC_BASE remembers the start position in source in each loop. | |
2627 | The loop will be exited when there's not enough source text to | |
2628 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
2629 | there's not enough destination area to produce encoded codes | |
2630 | (within macro EMIT_BYTES). */ | |
2631 | unsigned char *src_base; | |
2632 | int c; | |
2633 | Lisp_Object translation_table; | |
05e6f5dc KH |
2634 | Lisp_Object safe_chars; |
2635 | ||
0eecad43 KH |
2636 | if (coding->flags & CODING_FLAG_ISO_SAFE) |
2637 | coding->mode |= CODING_MODE_INHIBIT_UNENCODABLE_CHAR; | |
2638 | ||
6b89e3aa | 2639 | safe_chars = coding_safe_chars (coding->symbol); |
bdd9fb48 | 2640 | |
b73bfc1c KH |
2641 | if (NILP (Venable_character_translation)) |
2642 | translation_table = Qnil; | |
2643 | else | |
2644 | { | |
2645 | translation_table = coding->translation_table_for_encode; | |
2646 | if (NILP (translation_table)) | |
2647 | translation_table = Vstandard_translation_table_for_encode; | |
2648 | } | |
4ed46869 | 2649 | |
d46c5b12 | 2650 | coding->consumed_char = 0; |
b73bfc1c KH |
2651 | coding->errors = 0; |
2652 | while (1) | |
4ed46869 | 2653 | { |
b73bfc1c KH |
2654 | src_base = src; |
2655 | ||
2656 | if (dst >= (dst_bytes ? adjusted_dst_end : (src - 19))) | |
2657 | { | |
2658 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
2659 | break; | |
2660 | } | |
4ed46869 | 2661 | |
e0e989f6 KH |
2662 | if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL |
2663 | && CODING_SPEC_ISO_BOL (coding)) | |
2664 | { | |
bdd9fb48 | 2665 | /* We have to produce designation sequences if any now. */ |
b73bfc1c KH |
2666 | dst = encode_designation_at_bol (coding, translation_table, |
2667 | src, src_end, dst); | |
e0e989f6 KH |
2668 | CODING_SPEC_ISO_BOL (coding) = 0; |
2669 | } | |
2670 | ||
ec6d2bb8 KH |
2671 | /* Check composition start and end. */ |
2672 | if (coding->composing != COMPOSITION_DISABLED | |
2673 | && coding->cmp_data_start < coding->cmp_data->used) | |
4ed46869 | 2674 | { |
ec6d2bb8 KH |
2675 | struct composition_data *cmp_data = coding->cmp_data; |
2676 | int *data = cmp_data->data + coding->cmp_data_start; | |
2677 | int this_pos = cmp_data->char_offset + coding->consumed_char; | |
2678 | ||
2679 | if (coding->composing == COMPOSITION_RELATIVE) | |
4ed46869 | 2680 | { |
ec6d2bb8 KH |
2681 | if (this_pos == data[2]) |
2682 | { | |
2683 | ENCODE_COMPOSITION_END (coding, data); | |
2684 | cmp_data = coding->cmp_data; | |
2685 | data = cmp_data->data + coding->cmp_data_start; | |
2686 | } | |
4ed46869 | 2687 | } |
ec6d2bb8 | 2688 | else if (COMPOSING_P (coding)) |
4ed46869 | 2689 | { |
ec6d2bb8 KH |
2690 | /* COMPOSITION_WITH_ALTCHARS or COMPOSITION_WITH_RULE_ALTCHAR */ |
2691 | if (coding->cmp_data_index == coding->cmp_data_start + data[0]) | |
2692 | /* We have consumed components of the composition. | |
8ca3766a | 2693 | What follows in SRC is the composition's base |
ec6d2bb8 KH |
2694 | text. */ |
2695 | ENCODE_COMPOSITION_FAKE_START (coding); | |
2696 | else | |
4ed46869 | 2697 | { |
ec6d2bb8 KH |
2698 | int c = cmp_data->data[coding->cmp_data_index++]; |
2699 | if (coding->composition_rule_follows) | |
2700 | { | |
2701 | ENCODE_COMPOSITION_RULE (c); | |
2702 | coding->composition_rule_follows = 0; | |
2703 | } | |
2704 | else | |
2705 | { | |
0eecad43 | 2706 | if (coding->mode & CODING_MODE_INHIBIT_UNENCODABLE_CHAR |
05e6f5dc KH |
2707 | && ! CODING_SAFE_CHAR_P (safe_chars, c)) |
2708 | ENCODE_UNSAFE_CHARACTER (c); | |
2709 | else | |
2710 | ENCODE_ISO_CHARACTER (c); | |
ec6d2bb8 KH |
2711 | if (coding->composing == COMPOSITION_WITH_RULE_ALTCHARS) |
2712 | coding->composition_rule_follows = 1; | |
2713 | } | |
4ed46869 KH |
2714 | continue; |
2715 | } | |
ec6d2bb8 KH |
2716 | } |
2717 | if (!COMPOSING_P (coding)) | |
2718 | { | |
2719 | if (this_pos == data[1]) | |
4ed46869 | 2720 | { |
ec6d2bb8 KH |
2721 | ENCODE_COMPOSITION_START (coding, data); |
2722 | continue; | |
4ed46869 | 2723 | } |
4ed46869 KH |
2724 | } |
2725 | } | |
ec6d2bb8 | 2726 | |
b73bfc1c | 2727 | ONE_MORE_CHAR (c); |
4ed46869 | 2728 | |
b73bfc1c KH |
2729 | /* Now encode the character C. */ |
2730 | if (c < 0x20 || c == 0x7F) | |
2731 | { | |
2732 | if (c == '\r') | |
19a8d9e0 | 2733 | { |
b73bfc1c KH |
2734 | if (! (coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) |
2735 | { | |
2736 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL) | |
2737 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2738 | *dst++ = c; | |
2739 | continue; | |
2740 | } | |
2741 | /* fall down to treat '\r' as '\n' ... */ | |
2742 | c = '\n'; | |
19a8d9e0 | 2743 | } |
b73bfc1c | 2744 | if (c == '\n') |
19a8d9e0 | 2745 | { |
b73bfc1c KH |
2746 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_EOL) |
2747 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2748 | if (coding->flags & CODING_FLAG_ISO_INIT_AT_BOL) | |
2749 | bcopy (coding->spec.iso2022.initial_designation, | |
2750 | coding->spec.iso2022.current_designation, | |
2751 | sizeof coding->spec.iso2022.initial_designation); | |
2752 | if (coding->eol_type == CODING_EOL_LF | |
2753 | || coding->eol_type == CODING_EOL_UNDECIDED) | |
2754 | *dst++ = ISO_CODE_LF; | |
2755 | else if (coding->eol_type == CODING_EOL_CRLF) | |
2756 | *dst++ = ISO_CODE_CR, *dst++ = ISO_CODE_LF; | |
2757 | else | |
2758 | *dst++ = ISO_CODE_CR; | |
2759 | CODING_SPEC_ISO_BOL (coding) = 1; | |
19a8d9e0 | 2760 | } |
93dec019 | 2761 | else |
19a8d9e0 | 2762 | { |
b73bfc1c KH |
2763 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL) |
2764 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2765 | *dst++ = c; | |
19a8d9e0 | 2766 | } |
4ed46869 | 2767 | } |
b73bfc1c | 2768 | else if (ASCII_BYTE_P (c)) |
05e6f5dc | 2769 | ENCODE_ISO_CHARACTER (c); |
b73bfc1c | 2770 | else if (SINGLE_BYTE_CHAR_P (c)) |
88993dfd | 2771 | { |
b73bfc1c KH |
2772 | *dst++ = c; |
2773 | coding->errors++; | |
88993dfd | 2774 | } |
0eecad43 | 2775 | else if (coding->mode & CODING_MODE_INHIBIT_UNENCODABLE_CHAR |
05e6f5dc KH |
2776 | && ! CODING_SAFE_CHAR_P (safe_chars, c)) |
2777 | ENCODE_UNSAFE_CHARACTER (c); | |
b73bfc1c | 2778 | else |
05e6f5dc | 2779 | ENCODE_ISO_CHARACTER (c); |
b73bfc1c KH |
2780 | |
2781 | coding->consumed_char++; | |
84fbb8a0 | 2782 | } |
b73bfc1c KH |
2783 | |
2784 | label_end_of_loop: | |
2785 | coding->consumed = src_base - source; | |
d46c5b12 | 2786 | coding->produced = coding->produced_char = dst - destination; |
4ed46869 KH |
2787 | } |
2788 | ||
2789 | \f | |
2790 | /*** 4. SJIS and BIG5 handlers ***/ | |
2791 | ||
cfb43547 | 2792 | /* Although SJIS and BIG5 are not ISO coding systems, they are used |
4ed46869 KH |
2793 | quite widely. So, for the moment, Emacs supports them in the bare |
2794 | C code. But, in the future, they may be supported only by CCL. */ | |
2795 | ||
2796 | /* SJIS is a coding system encoding three character sets: ASCII, right | |
2797 | half of JISX0201-Kana, and JISX0208. An ASCII character is encoded | |
2798 | as is. A character of charset katakana-jisx0201 is encoded by | |
2799 | "position-code + 0x80". A character of charset japanese-jisx0208 | |
2800 | is encoded in 2-byte but two position-codes are divided and shifted | |
cfb43547 | 2801 | so that it fits in the range below. |
4ed46869 KH |
2802 | |
2803 | --- CODE RANGE of SJIS --- | |
2804 | (character set) (range) | |
2805 | ASCII 0x00 .. 0x7F | |
682169fe | 2806 | KATAKANA-JISX0201 0xA1 .. 0xDF |
c28a9453 | 2807 | JISX0208 (1st byte) 0x81 .. 0x9F and 0xE0 .. 0xEF |
d14d03ac | 2808 | (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC |
4ed46869 KH |
2809 | ------------------------------- |
2810 | ||
2811 | */ | |
2812 | ||
2813 | /* BIG5 is a coding system encoding two character sets: ASCII and | |
2814 | Big5. An ASCII character is encoded as is. Big5 is a two-byte | |
cfb43547 | 2815 | character set and is encoded in two bytes. |
4ed46869 KH |
2816 | |
2817 | --- CODE RANGE of BIG5 --- | |
2818 | (character set) (range) | |
2819 | ASCII 0x00 .. 0x7F | |
2820 | Big5 (1st byte) 0xA1 .. 0xFE | |
2821 | (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE | |
2822 | -------------------------- | |
2823 | ||
2824 | Since the number of characters in Big5 is larger than maximum | |
2825 | characters in Emacs' charset (96x96), it can't be handled as one | |
2826 | charset. So, in Emacs, Big5 is divided into two: `charset-big5-1' | |
2827 | and `charset-big5-2'. Both are DIMENSION2 and CHARS94. The former | |
2828 | contains frequently used characters and the latter contains less | |
2829 | frequently used characters. */ | |
2830 | ||
2831 | /* Macros to decode or encode a character of Big5 in BIG5. B1 and B2 | |
2832 | are the 1st and 2nd position-codes of Big5 in BIG5 coding system. | |
f458a8e0 | 2833 | C1 and C2 are the 1st and 2nd position-codes of Emacs' internal |
4ed46869 KH |
2834 | format. CHARSET is `charset_big5_1' or `charset_big5_2'. */ |
2835 | ||
2836 | /* Number of Big5 characters which have the same code in 1st byte. */ | |
2837 | #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40) | |
2838 | ||
2839 | #define DECODE_BIG5(b1, b2, charset, c1, c2) \ | |
2840 | do { \ | |
2841 | unsigned int temp \ | |
2842 | = (b1 - 0xA1) * BIG5_SAME_ROW + b2 - (b2 < 0x7F ? 0x40 : 0x62); \ | |
2843 | if (b1 < 0xC9) \ | |
2844 | charset = charset_big5_1; \ | |
2845 | else \ | |
2846 | { \ | |
2847 | charset = charset_big5_2; \ | |
2848 | temp -= (0xC9 - 0xA1) * BIG5_SAME_ROW; \ | |
2849 | } \ | |
2850 | c1 = temp / (0xFF - 0xA1) + 0x21; \ | |
2851 | c2 = temp % (0xFF - 0xA1) + 0x21; \ | |
2852 | } while (0) | |
2853 | ||
2854 | #define ENCODE_BIG5(charset, c1, c2, b1, b2) \ | |
2855 | do { \ | |
2856 | unsigned int temp = (c1 - 0x21) * (0xFF - 0xA1) + (c2 - 0x21); \ | |
2857 | if (charset == charset_big5_2) \ | |
2858 | temp += BIG5_SAME_ROW * (0xC9 - 0xA1); \ | |
2859 | b1 = temp / BIG5_SAME_ROW + 0xA1; \ | |
2860 | b2 = temp % BIG5_SAME_ROW; \ | |
2861 | b2 += b2 < 0x3F ? 0x40 : 0x62; \ | |
2862 | } while (0) | |
2863 | ||
2864 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2865 | Check if a text is encoded in SJIS. If it is, return | |
2866 | CODING_CATEGORY_MASK_SJIS, else return 0. */ | |
2867 | ||
0a28aafb KH |
2868 | static int |
2869 | detect_coding_sjis (src, src_end, multibytep) | |
4ed46869 | 2870 | unsigned char *src, *src_end; |
0a28aafb | 2871 | int multibytep; |
4ed46869 | 2872 | { |
b73bfc1c KH |
2873 | int c; |
2874 | /* Dummy for ONE_MORE_BYTE. */ | |
2875 | struct coding_system dummy_coding; | |
2876 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 2877 | |
b73bfc1c | 2878 | while (1) |
4ed46869 | 2879 | { |
0a28aafb | 2880 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
682169fe KH |
2881 | if (c < 0x80) |
2882 | continue; | |
2883 | if (c == 0x80 || c == 0xA0 || c > 0xEF) | |
2884 | return 0; | |
2885 | if (c <= 0x9F || c >= 0xE0) | |
4ed46869 | 2886 | { |
682169fe KH |
2887 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
2888 | if (c < 0x40 || c == 0x7F || c > 0xFC) | |
4ed46869 KH |
2889 | return 0; |
2890 | } | |
2891 | } | |
b73bfc1c | 2892 | label_end_of_loop: |
4ed46869 KH |
2893 | return CODING_CATEGORY_MASK_SJIS; |
2894 | } | |
2895 | ||
2896 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2897 | Check if a text is encoded in BIG5. If it is, return | |
2898 | CODING_CATEGORY_MASK_BIG5, else return 0. */ | |
2899 | ||
0a28aafb KH |
2900 | static int |
2901 | detect_coding_big5 (src, src_end, multibytep) | |
4ed46869 | 2902 | unsigned char *src, *src_end; |
0a28aafb | 2903 | int multibytep; |
4ed46869 | 2904 | { |
b73bfc1c KH |
2905 | int c; |
2906 | /* Dummy for ONE_MORE_BYTE. */ | |
2907 | struct coding_system dummy_coding; | |
2908 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 2909 | |
b73bfc1c | 2910 | while (1) |
4ed46869 | 2911 | { |
0a28aafb | 2912 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
682169fe KH |
2913 | if (c < 0x80) |
2914 | continue; | |
2915 | if (c < 0xA1 || c > 0xFE) | |
2916 | return 0; | |
2917 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); | |
2918 | if (c < 0x40 || (c > 0x7F && c < 0xA1) || c > 0xFE) | |
2919 | return 0; | |
4ed46869 | 2920 | } |
b73bfc1c | 2921 | label_end_of_loop: |
4ed46869 KH |
2922 | return CODING_CATEGORY_MASK_BIG5; |
2923 | } | |
2924 | ||
fa42c37f KH |
2925 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
2926 | Check if a text is encoded in UTF-8. If it is, return | |
2927 | CODING_CATEGORY_MASK_UTF_8, else return 0. */ | |
2928 | ||
2929 | #define UTF_8_1_OCTET_P(c) ((c) < 0x80) | |
2930 | #define UTF_8_EXTRA_OCTET_P(c) (((c) & 0xC0) == 0x80) | |
2931 | #define UTF_8_2_OCTET_LEADING_P(c) (((c) & 0xE0) == 0xC0) | |
2932 | #define UTF_8_3_OCTET_LEADING_P(c) (((c) & 0xF0) == 0xE0) | |
2933 | #define UTF_8_4_OCTET_LEADING_P(c) (((c) & 0xF8) == 0xF0) | |
2934 | #define UTF_8_5_OCTET_LEADING_P(c) (((c) & 0xFC) == 0xF8) | |
2935 | #define UTF_8_6_OCTET_LEADING_P(c) (((c) & 0xFE) == 0xFC) | |
2936 | ||
0a28aafb KH |
2937 | static int |
2938 | detect_coding_utf_8 (src, src_end, multibytep) | |
fa42c37f | 2939 | unsigned char *src, *src_end; |
0a28aafb | 2940 | int multibytep; |
fa42c37f KH |
2941 | { |
2942 | unsigned char c; | |
2943 | int seq_maybe_bytes; | |
b73bfc1c KH |
2944 | /* Dummy for ONE_MORE_BYTE. */ |
2945 | struct coding_system dummy_coding; | |
2946 | struct coding_system *coding = &dummy_coding; | |
fa42c37f | 2947 | |
b73bfc1c | 2948 | while (1) |
fa42c37f | 2949 | { |
0a28aafb | 2950 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
fa42c37f KH |
2951 | if (UTF_8_1_OCTET_P (c)) |
2952 | continue; | |
2953 | else if (UTF_8_2_OCTET_LEADING_P (c)) | |
2954 | seq_maybe_bytes = 1; | |
2955 | else if (UTF_8_3_OCTET_LEADING_P (c)) | |
2956 | seq_maybe_bytes = 2; | |
2957 | else if (UTF_8_4_OCTET_LEADING_P (c)) | |
2958 | seq_maybe_bytes = 3; | |
2959 | else if (UTF_8_5_OCTET_LEADING_P (c)) | |
2960 | seq_maybe_bytes = 4; | |
2961 | else if (UTF_8_6_OCTET_LEADING_P (c)) | |
2962 | seq_maybe_bytes = 5; | |
2963 | else | |
2964 | return 0; | |
2965 | ||
2966 | do | |
2967 | { | |
0a28aafb | 2968 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
fa42c37f KH |
2969 | if (!UTF_8_EXTRA_OCTET_P (c)) |
2970 | return 0; | |
2971 | seq_maybe_bytes--; | |
2972 | } | |
2973 | while (seq_maybe_bytes > 0); | |
2974 | } | |
2975 | ||
b73bfc1c | 2976 | label_end_of_loop: |
fa42c37f KH |
2977 | return CODING_CATEGORY_MASK_UTF_8; |
2978 | } | |
2979 | ||
2980 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2981 | Check if a text is encoded in UTF-16 Big Endian (endian == 1) or | |
2982 | Little Endian (otherwise). If it is, return | |
2983 | CODING_CATEGORY_MASK_UTF_16_BE or CODING_CATEGORY_MASK_UTF_16_LE, | |
2984 | else return 0. */ | |
2985 | ||
2986 | #define UTF_16_INVALID_P(val) \ | |
2987 | (((val) == 0xFFFE) \ | |
2988 | || ((val) == 0xFFFF)) | |
2989 | ||
2990 | #define UTF_16_HIGH_SURROGATE_P(val) \ | |
2991 | (((val) & 0xD800) == 0xD800) | |
2992 | ||
2993 | #define UTF_16_LOW_SURROGATE_P(val) \ | |
2994 | (((val) & 0xDC00) == 0xDC00) | |
2995 | ||
0a28aafb KH |
2996 | static int |
2997 | detect_coding_utf_16 (src, src_end, multibytep) | |
fa42c37f | 2998 | unsigned char *src, *src_end; |
0a28aafb | 2999 | int multibytep; |
fa42c37f | 3000 | { |
b73bfc1c | 3001 | unsigned char c1, c2; |
1c7457e2 | 3002 | /* Dummy for ONE_MORE_BYTE_CHECK_MULTIBYTE. */ |
b73bfc1c KH |
3003 | struct coding_system dummy_coding; |
3004 | struct coding_system *coding = &dummy_coding; | |
fa42c37f | 3005 | |
0a28aafb KH |
3006 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
3007 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c2, multibytep); | |
b73bfc1c KH |
3008 | |
3009 | if ((c1 == 0xFF) && (c2 == 0xFE)) | |
fa42c37f | 3010 | return CODING_CATEGORY_MASK_UTF_16_LE; |
b73bfc1c | 3011 | else if ((c1 == 0xFE) && (c2 == 0xFF)) |
fa42c37f KH |
3012 | return CODING_CATEGORY_MASK_UTF_16_BE; |
3013 | ||
b73bfc1c | 3014 | label_end_of_loop: |
fa42c37f KH |
3015 | return 0; |
3016 | } | |
3017 | ||
4ed46869 KH |
3018 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". |
3019 | If SJIS_P is 1, decode SJIS text, else decode BIG5 test. */ | |
3020 | ||
b73bfc1c | 3021 | static void |
4ed46869 | 3022 | decode_coding_sjis_big5 (coding, source, destination, |
d46c5b12 | 3023 | src_bytes, dst_bytes, sjis_p) |
4ed46869 KH |
3024 | struct coding_system *coding; |
3025 | unsigned char *source, *destination; | |
3026 | int src_bytes, dst_bytes; | |
4ed46869 KH |
3027 | int sjis_p; |
3028 | { | |
3029 | unsigned char *src = source; | |
3030 | unsigned char *src_end = source + src_bytes; | |
3031 | unsigned char *dst = destination; | |
3032 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c KH |
3033 | /* SRC_BASE remembers the start position in source in each loop. |
3034 | The loop will be exited when there's not enough source code | |
3035 | (within macro ONE_MORE_BYTE), or when there's not enough | |
3036 | destination area to produce a character (within macro | |
3037 | EMIT_CHAR). */ | |
3038 | unsigned char *src_base; | |
3039 | Lisp_Object translation_table; | |
a5d301df | 3040 | |
b73bfc1c KH |
3041 | if (NILP (Venable_character_translation)) |
3042 | translation_table = Qnil; | |
3043 | else | |
3044 | { | |
3045 | translation_table = coding->translation_table_for_decode; | |
3046 | if (NILP (translation_table)) | |
3047 | translation_table = Vstandard_translation_table_for_decode; | |
3048 | } | |
4ed46869 | 3049 | |
d46c5b12 | 3050 | coding->produced_char = 0; |
b73bfc1c | 3051 | while (1) |
4ed46869 | 3052 | { |
85478bc6 | 3053 | int c, charset, c1, c2 = 0; |
b73bfc1c KH |
3054 | |
3055 | src_base = src; | |
3056 | ONE_MORE_BYTE (c1); | |
3057 | ||
3058 | if (c1 < 0x80) | |
4ed46869 | 3059 | { |
b73bfc1c KH |
3060 | charset = CHARSET_ASCII; |
3061 | if (c1 < 0x20) | |
4ed46869 | 3062 | { |
b73bfc1c | 3063 | if (c1 == '\r') |
d46c5b12 | 3064 | { |
b73bfc1c | 3065 | if (coding->eol_type == CODING_EOL_CRLF) |
d46c5b12 | 3066 | { |
b73bfc1c KH |
3067 | ONE_MORE_BYTE (c2); |
3068 | if (c2 == '\n') | |
3069 | c1 = c2; | |
b73bfc1c KH |
3070 | else |
3071 | /* To process C2 again, SRC is subtracted by 1. */ | |
3072 | src--; | |
d46c5b12 | 3073 | } |
b73bfc1c KH |
3074 | else if (coding->eol_type == CODING_EOL_CR) |
3075 | c1 = '\n'; | |
3076 | } | |
3077 | else if (c1 == '\n' | |
3078 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
3079 | && (coding->eol_type == CODING_EOL_CR | |
3080 | || coding->eol_type == CODING_EOL_CRLF)) | |
3081 | { | |
3082 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
3083 | goto label_end_of_loop; | |
d46c5b12 | 3084 | } |
4ed46869 | 3085 | } |
4ed46869 | 3086 | } |
54f78171 | 3087 | else |
b73bfc1c | 3088 | { |
4ed46869 KH |
3089 | if (sjis_p) |
3090 | { | |
682169fe | 3091 | if (c1 == 0x80 || c1 == 0xA0 || c1 > 0xEF) |
b73bfc1c | 3092 | goto label_invalid_code; |
682169fe | 3093 | if (c1 <= 0x9F || c1 >= 0xE0) |
fb88bf2d | 3094 | { |
54f78171 KH |
3095 | /* SJIS -> JISX0208 */ |
3096 | ONE_MORE_BYTE (c2); | |
b73bfc1c KH |
3097 | if (c2 < 0x40 || c2 == 0x7F || c2 > 0xFC) |
3098 | goto label_invalid_code; | |
3099 | DECODE_SJIS (c1, c2, c1, c2); | |
3100 | charset = charset_jisx0208; | |
5e34de15 | 3101 | } |
fb88bf2d | 3102 | else |
b73bfc1c KH |
3103 | /* SJIS -> JISX0201-Kana */ |
3104 | charset = charset_katakana_jisx0201; | |
4ed46869 | 3105 | } |
fb88bf2d | 3106 | else |
fb88bf2d | 3107 | { |
54f78171 | 3108 | /* BIG5 -> Big5 */ |
682169fe | 3109 | if (c1 < 0xA0 || c1 > 0xFE) |
b73bfc1c KH |
3110 | goto label_invalid_code; |
3111 | ONE_MORE_BYTE (c2); | |
3112 | if (c2 < 0x40 || (c2 > 0x7E && c2 < 0xA1) || c2 > 0xFE) | |
3113 | goto label_invalid_code; | |
3114 | DECODE_BIG5 (c1, c2, charset, c1, c2); | |
4ed46869 KH |
3115 | } |
3116 | } | |
4ed46869 | 3117 | |
b73bfc1c KH |
3118 | c = DECODE_ISO_CHARACTER (charset, c1, c2); |
3119 | EMIT_CHAR (c); | |
fb88bf2d KH |
3120 | continue; |
3121 | ||
b73bfc1c KH |
3122 | label_invalid_code: |
3123 | coding->errors++; | |
4ed46869 | 3124 | src = src_base; |
b73bfc1c KH |
3125 | c = *src++; |
3126 | EMIT_CHAR (c); | |
fb88bf2d | 3127 | } |
d46c5b12 | 3128 | |
b73bfc1c KH |
3129 | label_end_of_loop: |
3130 | coding->consumed = coding->consumed_char = src_base - source; | |
d46c5b12 | 3131 | coding->produced = dst - destination; |
b73bfc1c | 3132 | return; |
4ed46869 KH |
3133 | } |
3134 | ||
3135 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". | |
b73bfc1c KH |
3136 | This function can encode charsets `ascii', `katakana-jisx0201', |
3137 | `japanese-jisx0208', `chinese-big5-1', and `chinese-big5-2'. We | |
3138 | are sure that all these charsets are registered as official charset | |
4ed46869 KH |
3139 | (i.e. do not have extended leading-codes). Characters of other |
3140 | charsets are produced without any encoding. If SJIS_P is 1, encode | |
3141 | SJIS text, else encode BIG5 text. */ | |
3142 | ||
b73bfc1c | 3143 | static void |
4ed46869 | 3144 | encode_coding_sjis_big5 (coding, source, destination, |
d46c5b12 | 3145 | src_bytes, dst_bytes, sjis_p) |
4ed46869 KH |
3146 | struct coding_system *coding; |
3147 | unsigned char *source, *destination; | |
3148 | int src_bytes, dst_bytes; | |
4ed46869 KH |
3149 | int sjis_p; |
3150 | { | |
3151 | unsigned char *src = source; | |
3152 | unsigned char *src_end = source + src_bytes; | |
3153 | unsigned char *dst = destination; | |
3154 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c KH |
3155 | /* SRC_BASE remembers the start position in source in each loop. |
3156 | The loop will be exited when there's not enough source text to | |
3157 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
3158 | there's not enough destination area to produce encoded codes | |
3159 | (within macro EMIT_BYTES). */ | |
3160 | unsigned char *src_base; | |
3161 | Lisp_Object translation_table; | |
4ed46869 | 3162 | |
b73bfc1c KH |
3163 | if (NILP (Venable_character_translation)) |
3164 | translation_table = Qnil; | |
3165 | else | |
4ed46869 | 3166 | { |
39658efc | 3167 | translation_table = coding->translation_table_for_encode; |
b73bfc1c | 3168 | if (NILP (translation_table)) |
39658efc | 3169 | translation_table = Vstandard_translation_table_for_encode; |
b73bfc1c | 3170 | } |
a5d301df | 3171 | |
b73bfc1c KH |
3172 | while (1) |
3173 | { | |
3174 | int c, charset, c1, c2; | |
4ed46869 | 3175 | |
b73bfc1c KH |
3176 | src_base = src; |
3177 | ONE_MORE_CHAR (c); | |
93dec019 | 3178 | |
b73bfc1c KH |
3179 | /* Now encode the character C. */ |
3180 | if (SINGLE_BYTE_CHAR_P (c)) | |
3181 | { | |
3182 | switch (c) | |
4ed46869 | 3183 | { |
b73bfc1c | 3184 | case '\r': |
7371fe0a | 3185 | if (!(coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) |
b73bfc1c KH |
3186 | { |
3187 | EMIT_ONE_BYTE (c); | |
3188 | break; | |
3189 | } | |
3190 | c = '\n'; | |
3191 | case '\n': | |
3192 | if (coding->eol_type == CODING_EOL_CRLF) | |
3193 | { | |
3194 | EMIT_TWO_BYTES ('\r', c); | |
3195 | break; | |
3196 | } | |
3197 | else if (coding->eol_type == CODING_EOL_CR) | |
3198 | c = '\r'; | |
3199 | default: | |
3200 | EMIT_ONE_BYTE (c); | |
3201 | } | |
3202 | } | |
3203 | else | |
3204 | { | |
3205 | SPLIT_CHAR (c, charset, c1, c2); | |
3206 | if (sjis_p) | |
3207 | { | |
3208 | if (charset == charset_jisx0208 | |
3209 | || charset == charset_jisx0208_1978) | |
3210 | { | |
3211 | ENCODE_SJIS (c1, c2, c1, c2); | |
3212 | EMIT_TWO_BYTES (c1, c2); | |
3213 | } | |
39658efc KH |
3214 | else if (charset == charset_katakana_jisx0201) |
3215 | EMIT_ONE_BYTE (c1 | 0x80); | |
fc53a214 KH |
3216 | else if (charset == charset_latin_jisx0201) |
3217 | EMIT_ONE_BYTE (c1); | |
0eecad43 KH |
3218 | else if (coding->mode & CODING_MODE_INHIBIT_UNENCODABLE_CHAR) |
3219 | { | |
3220 | EMIT_ONE_BYTE (CODING_REPLACEMENT_CHARACTER); | |
3221 | if (CHARSET_WIDTH (charset) > 1) | |
3222 | EMIT_ONE_BYTE (CODING_REPLACEMENT_CHARACTER); | |
3223 | } | |
b73bfc1c KH |
3224 | else |
3225 | /* There's no way other than producing the internal | |
3226 | codes as is. */ | |
3227 | EMIT_BYTES (src_base, src); | |
4ed46869 | 3228 | } |
4ed46869 | 3229 | else |
b73bfc1c KH |
3230 | { |
3231 | if (charset == charset_big5_1 || charset == charset_big5_2) | |
3232 | { | |
3233 | ENCODE_BIG5 (charset, c1, c2, c1, c2); | |
3234 | EMIT_TWO_BYTES (c1, c2); | |
3235 | } | |
0eecad43 KH |
3236 | else if (coding->mode & CODING_MODE_INHIBIT_UNENCODABLE_CHAR) |
3237 | { | |
3238 | EMIT_ONE_BYTE (CODING_REPLACEMENT_CHARACTER); | |
3239 | if (CHARSET_WIDTH (charset) > 1) | |
3240 | EMIT_ONE_BYTE (CODING_REPLACEMENT_CHARACTER); | |
3241 | } | |
b73bfc1c KH |
3242 | else |
3243 | /* There's no way other than producing the internal | |
3244 | codes as is. */ | |
3245 | EMIT_BYTES (src_base, src); | |
3246 | } | |
4ed46869 | 3247 | } |
b73bfc1c | 3248 | coding->consumed_char++; |
4ed46869 KH |
3249 | } |
3250 | ||
b73bfc1c KH |
3251 | label_end_of_loop: |
3252 | coding->consumed = src_base - source; | |
d46c5b12 | 3253 | coding->produced = coding->produced_char = dst - destination; |
4ed46869 KH |
3254 | } |
3255 | ||
3256 | \f | |
1397dc18 KH |
3257 | /*** 5. CCL handlers ***/ |
3258 | ||
3259 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3260 | Check if a text is encoded in a coding system of which | |
3261 | encoder/decoder are written in CCL program. If it is, return | |
3262 | CODING_CATEGORY_MASK_CCL, else return 0. */ | |
3263 | ||
0a28aafb KH |
3264 | static int |
3265 | detect_coding_ccl (src, src_end, multibytep) | |
1397dc18 | 3266 | unsigned char *src, *src_end; |
0a28aafb | 3267 | int multibytep; |
1397dc18 KH |
3268 | { |
3269 | unsigned char *valid; | |
b73bfc1c KH |
3270 | int c; |
3271 | /* Dummy for ONE_MORE_BYTE. */ | |
3272 | struct coding_system dummy_coding; | |
3273 | struct coding_system *coding = &dummy_coding; | |
1397dc18 KH |
3274 | |
3275 | /* No coding system is assigned to coding-category-ccl. */ | |
3276 | if (!coding_system_table[CODING_CATEGORY_IDX_CCL]) | |
3277 | return 0; | |
3278 | ||
3279 | valid = coding_system_table[CODING_CATEGORY_IDX_CCL]->spec.ccl.valid_codes; | |
b73bfc1c | 3280 | while (1) |
1397dc18 | 3281 | { |
0a28aafb | 3282 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
b73bfc1c KH |
3283 | if (! valid[c]) |
3284 | return 0; | |
1397dc18 | 3285 | } |
b73bfc1c | 3286 | label_end_of_loop: |
1397dc18 KH |
3287 | return CODING_CATEGORY_MASK_CCL; |
3288 | } | |
3289 | ||
3290 | \f | |
3291 | /*** 6. End-of-line handlers ***/ | |
4ed46869 | 3292 | |
b73bfc1c | 3293 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
4ed46869 | 3294 | |
b73bfc1c | 3295 | static void |
d46c5b12 | 3296 | decode_eol (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
3297 | struct coding_system *coding; |
3298 | unsigned char *source, *destination; | |
3299 | int src_bytes, dst_bytes; | |
4ed46869 KH |
3300 | { |
3301 | unsigned char *src = source; | |
4ed46869 | 3302 | unsigned char *dst = destination; |
b73bfc1c KH |
3303 | unsigned char *src_end = src + src_bytes; |
3304 | unsigned char *dst_end = dst + dst_bytes; | |
3305 | Lisp_Object translation_table; | |
3306 | /* SRC_BASE remembers the start position in source in each loop. | |
3307 | The loop will be exited when there's not enough source code | |
3308 | (within macro ONE_MORE_BYTE), or when there's not enough | |
3309 | destination area to produce a character (within macro | |
3310 | EMIT_CHAR). */ | |
3311 | unsigned char *src_base; | |
3312 | int c; | |
3313 | ||
3314 | translation_table = Qnil; | |
4ed46869 KH |
3315 | switch (coding->eol_type) |
3316 | { | |
3317 | case CODING_EOL_CRLF: | |
b73bfc1c | 3318 | while (1) |
d46c5b12 | 3319 | { |
b73bfc1c KH |
3320 | src_base = src; |
3321 | ONE_MORE_BYTE (c); | |
3322 | if (c == '\r') | |
fb88bf2d | 3323 | { |
b73bfc1c KH |
3324 | ONE_MORE_BYTE (c); |
3325 | if (c != '\n') | |
3326 | { | |
b73bfc1c KH |
3327 | src--; |
3328 | c = '\r'; | |
3329 | } | |
fb88bf2d | 3330 | } |
b73bfc1c KH |
3331 | else if (c == '\n' |
3332 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL)) | |
d46c5b12 | 3333 | { |
b73bfc1c KH |
3334 | coding->result = CODING_FINISH_INCONSISTENT_EOL; |
3335 | goto label_end_of_loop; | |
d46c5b12 | 3336 | } |
b73bfc1c | 3337 | EMIT_CHAR (c); |
d46c5b12 | 3338 | } |
b73bfc1c KH |
3339 | break; |
3340 | ||
3341 | case CODING_EOL_CR: | |
3342 | while (1) | |
d46c5b12 | 3343 | { |
b73bfc1c KH |
3344 | src_base = src; |
3345 | ONE_MORE_BYTE (c); | |
3346 | if (c == '\n') | |
3347 | { | |
3348 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
3349 | { | |
3350 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
3351 | goto label_end_of_loop; | |
3352 | } | |
3353 | } | |
3354 | else if (c == '\r') | |
3355 | c = '\n'; | |
3356 | EMIT_CHAR (c); | |
d46c5b12 | 3357 | } |
4ed46869 KH |
3358 | break; |
3359 | ||
b73bfc1c KH |
3360 | default: /* no need for EOL handling */ |
3361 | while (1) | |
d46c5b12 | 3362 | { |
b73bfc1c KH |
3363 | src_base = src; |
3364 | ONE_MORE_BYTE (c); | |
3365 | EMIT_CHAR (c); | |
d46c5b12 | 3366 | } |
4ed46869 KH |
3367 | } |
3368 | ||
b73bfc1c KH |
3369 | label_end_of_loop: |
3370 | coding->consumed = coding->consumed_char = src_base - source; | |
3371 | coding->produced = dst - destination; | |
3372 | return; | |
4ed46869 KH |
3373 | } |
3374 | ||
3375 | /* See "GENERAL NOTES about `encode_coding_XXX ()' functions". Encode | |
b73bfc1c | 3376 | format of end-of-line according to `coding->eol_type'. It also |
8ca3766a | 3377 | convert multibyte form 8-bit characters to unibyte if |
b73bfc1c KH |
3378 | CODING->src_multibyte is nonzero. If `coding->mode & |
3379 | CODING_MODE_SELECTIVE_DISPLAY' is nonzero, code '\r' in source text | |
3380 | also means end-of-line. */ | |
4ed46869 | 3381 | |
b73bfc1c | 3382 | static void |
d46c5b12 | 3383 | encode_eol (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 3384 | struct coding_system *coding; |
a4244313 KR |
3385 | const unsigned char *source; |
3386 | unsigned char *destination; | |
4ed46869 | 3387 | int src_bytes, dst_bytes; |
4ed46869 | 3388 | { |
a4244313 | 3389 | const unsigned char *src = source; |
4ed46869 | 3390 | unsigned char *dst = destination; |
a4244313 | 3391 | const unsigned char *src_end = src + src_bytes; |
b73bfc1c KH |
3392 | unsigned char *dst_end = dst + dst_bytes; |
3393 | Lisp_Object translation_table; | |
3394 | /* SRC_BASE remembers the start position in source in each loop. | |
3395 | The loop will be exited when there's not enough source text to | |
3396 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
3397 | there's not enough destination area to produce encoded codes | |
3398 | (within macro EMIT_BYTES). */ | |
a4244313 KR |
3399 | const unsigned char *src_base; |
3400 | unsigned char *tmp; | |
b73bfc1c KH |
3401 | int c; |
3402 | int selective_display = coding->mode & CODING_MODE_SELECTIVE_DISPLAY; | |
3403 | ||
3404 | translation_table = Qnil; | |
3405 | if (coding->src_multibyte | |
3406 | && *(src_end - 1) == LEADING_CODE_8_BIT_CONTROL) | |
3407 | { | |
3408 | src_end--; | |
3409 | src_bytes--; | |
3410 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; | |
3411 | } | |
fb88bf2d | 3412 | |
d46c5b12 KH |
3413 | if (coding->eol_type == CODING_EOL_CRLF) |
3414 | { | |
b73bfc1c | 3415 | while (src < src_end) |
d46c5b12 | 3416 | { |
b73bfc1c | 3417 | src_base = src; |
d46c5b12 | 3418 | c = *src++; |
b73bfc1c KH |
3419 | if (c >= 0x20) |
3420 | EMIT_ONE_BYTE (c); | |
3421 | else if (c == '\n' || (c == '\r' && selective_display)) | |
3422 | EMIT_TWO_BYTES ('\r', '\n'); | |
d46c5b12 | 3423 | else |
b73bfc1c | 3424 | EMIT_ONE_BYTE (c); |
d46c5b12 | 3425 | } |
ff2b1ea9 | 3426 | src_base = src; |
b73bfc1c | 3427 | label_end_of_loop: |
005f0d35 | 3428 | ; |
d46c5b12 KH |
3429 | } |
3430 | else | |
4ed46869 | 3431 | { |
78a629d2 | 3432 | if (!dst_bytes || src_bytes <= dst_bytes) |
4ed46869 | 3433 | { |
b73bfc1c KH |
3434 | safe_bcopy (src, dst, src_bytes); |
3435 | src_base = src_end; | |
3436 | dst += src_bytes; | |
d46c5b12 | 3437 | } |
d46c5b12 | 3438 | else |
b73bfc1c KH |
3439 | { |
3440 | if (coding->src_multibyte | |
3441 | && *(src + dst_bytes - 1) == LEADING_CODE_8_BIT_CONTROL) | |
3442 | dst_bytes--; | |
3443 | safe_bcopy (src, dst, dst_bytes); | |
3444 | src_base = src + dst_bytes; | |
3445 | dst = destination + dst_bytes; | |
3446 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
3447 | } | |
993824c9 | 3448 | if (coding->eol_type == CODING_EOL_CR) |
d46c5b12 | 3449 | { |
a4244313 KR |
3450 | for (tmp = destination; tmp < dst; tmp++) |
3451 | if (*tmp == '\n') *tmp = '\r'; | |
d46c5b12 | 3452 | } |
b73bfc1c | 3453 | else if (selective_display) |
d46c5b12 | 3454 | { |
a4244313 KR |
3455 | for (tmp = destination; tmp < dst; tmp++) |
3456 | if (*tmp == '\r') *tmp = '\n'; | |
4ed46869 | 3457 | } |
4ed46869 | 3458 | } |
b73bfc1c KH |
3459 | if (coding->src_multibyte) |
3460 | dst = destination + str_as_unibyte (destination, dst - destination); | |
4ed46869 | 3461 | |
b73bfc1c KH |
3462 | coding->consumed = src_base - source; |
3463 | coding->produced = dst - destination; | |
78a629d2 | 3464 | coding->produced_char = coding->produced; |
4ed46869 KH |
3465 | } |
3466 | ||
3467 | \f | |
1397dc18 | 3468 | /*** 7. C library functions ***/ |
4ed46869 | 3469 | |
cfb43547 | 3470 | /* In Emacs Lisp, a coding system is represented by a Lisp symbol which |
4ed46869 | 3471 | has a property `coding-system'. The value of this property is a |
cfb43547 | 3472 | vector of length 5 (called the coding-vector). Among elements of |
4ed46869 KH |
3473 | this vector, the first (element[0]) and the fifth (element[4]) |
3474 | carry important information for decoding/encoding. Before | |
3475 | decoding/encoding, this information should be set in fields of a | |
3476 | structure of type `coding_system'. | |
3477 | ||
cfb43547 | 3478 | The value of the property `coding-system' can be a symbol of another |
4ed46869 KH |
3479 | subsidiary coding-system. In that case, Emacs gets coding-vector |
3480 | from that symbol. | |
3481 | ||
3482 | `element[0]' contains information to be set in `coding->type'. The | |
3483 | value and its meaning is as follows: | |
3484 | ||
0ef69138 KH |
3485 | 0 -- coding_type_emacs_mule |
3486 | 1 -- coding_type_sjis | |
3487 | 2 -- coding_type_iso2022 | |
3488 | 3 -- coding_type_big5 | |
3489 | 4 -- coding_type_ccl encoder/decoder written in CCL | |
3490 | nil -- coding_type_no_conversion | |
3491 | t -- coding_type_undecided (automatic conversion on decoding, | |
3492 | no-conversion on encoding) | |
4ed46869 KH |
3493 | |
3494 | `element[4]' contains information to be set in `coding->flags' and | |
3495 | `coding->spec'. The meaning varies by `coding->type'. | |
3496 | ||
3497 | If `coding->type' is `coding_type_iso2022', element[4] is a vector | |
3498 | of length 32 (of which the first 13 sub-elements are used now). | |
3499 | Meanings of these sub-elements are: | |
3500 | ||
3501 | sub-element[N] where N is 0 through 3: to be set in `coding->spec.iso2022' | |
3502 | If the value is an integer of valid charset, the charset is | |
3503 | assumed to be designated to graphic register N initially. | |
3504 | ||
3505 | If the value is minus, it is a minus value of charset which | |
3506 | reserves graphic register N, which means that the charset is | |
3507 | not designated initially but should be designated to graphic | |
3508 | register N just before encoding a character in that charset. | |
3509 | ||
3510 | If the value is nil, graphic register N is never used on | |
3511 | encoding. | |
93dec019 | 3512 | |
4ed46869 KH |
3513 | sub-element[N] where N is 4 through 11: to be set in `coding->flags' |
3514 | Each value takes t or nil. See the section ISO2022 of | |
3515 | `coding.h' for more information. | |
3516 | ||
3517 | If `coding->type' is `coding_type_big5', element[4] is t to denote | |
3518 | BIG5-ETen or nil to denote BIG5-HKU. | |
3519 | ||
3520 | If `coding->type' takes the other value, element[4] is ignored. | |
3521 | ||
cfb43547 | 3522 | Emacs Lisp's coding systems also carry information about format of |
4ed46869 KH |
3523 | end-of-line in a value of property `eol-type'. If the value is |
3524 | integer, 0 means CODING_EOL_LF, 1 means CODING_EOL_CRLF, and 2 | |
3525 | means CODING_EOL_CR. If it is not integer, it should be a vector | |
3526 | of subsidiary coding systems of which property `eol-type' has one | |
cfb43547 | 3527 | of the above values. |
4ed46869 KH |
3528 | |
3529 | */ | |
3530 | ||
3531 | /* Extract information for decoding/encoding from CODING_SYSTEM_SYMBOL | |
3532 | and set it in CODING. If CODING_SYSTEM_SYMBOL is invalid, CODING | |
3533 | is setup so that no conversion is necessary and return -1, else | |
3534 | return 0. */ | |
3535 | ||
3536 | int | |
e0e989f6 KH |
3537 | setup_coding_system (coding_system, coding) |
3538 | Lisp_Object coding_system; | |
4ed46869 KH |
3539 | struct coding_system *coding; |
3540 | { | |
d46c5b12 | 3541 | Lisp_Object coding_spec, coding_type, eol_type, plist; |
4608c386 | 3542 | Lisp_Object val; |
4ed46869 | 3543 | |
c07c8e12 KH |
3544 | /* At first, zero clear all members. */ |
3545 | bzero (coding, sizeof (struct coding_system)); | |
3546 | ||
d46c5b12 | 3547 | /* Initialize some fields required for all kinds of coding systems. */ |
774324d6 | 3548 | coding->symbol = coding_system; |
d46c5b12 KH |
3549 | coding->heading_ascii = -1; |
3550 | coding->post_read_conversion = coding->pre_write_conversion = Qnil; | |
ec6d2bb8 KH |
3551 | coding->composing = COMPOSITION_DISABLED; |
3552 | coding->cmp_data = NULL; | |
1f5dbf34 KH |
3553 | |
3554 | if (NILP (coding_system)) | |
3555 | goto label_invalid_coding_system; | |
3556 | ||
4608c386 | 3557 | coding_spec = Fget (coding_system, Qcoding_system); |
1f5dbf34 | 3558 | |
4608c386 KH |
3559 | if (!VECTORP (coding_spec) |
3560 | || XVECTOR (coding_spec)->size != 5 | |
3561 | || !CONSP (XVECTOR (coding_spec)->contents[3])) | |
4ed46869 | 3562 | goto label_invalid_coding_system; |
4608c386 | 3563 | |
d46c5b12 KH |
3564 | eol_type = inhibit_eol_conversion ? Qnil : Fget (coding_system, Qeol_type); |
3565 | if (VECTORP (eol_type)) | |
3566 | { | |
3567 | coding->eol_type = CODING_EOL_UNDECIDED; | |
3568 | coding->common_flags = CODING_REQUIRE_DETECTION_MASK; | |
3569 | } | |
3570 | else if (XFASTINT (eol_type) == 1) | |
3571 | { | |
3572 | coding->eol_type = CODING_EOL_CRLF; | |
3573 | coding->common_flags | |
3574 | = CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
3575 | } | |
3576 | else if (XFASTINT (eol_type) == 2) | |
3577 | { | |
3578 | coding->eol_type = CODING_EOL_CR; | |
3579 | coding->common_flags | |
3580 | = CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
3581 | } | |
3582 | else | |
3583 | coding->eol_type = CODING_EOL_LF; | |
3584 | ||
3585 | coding_type = XVECTOR (coding_spec)->contents[0]; | |
3586 | /* Try short cut. */ | |
3587 | if (SYMBOLP (coding_type)) | |
3588 | { | |
3589 | if (EQ (coding_type, Qt)) | |
3590 | { | |
3591 | coding->type = coding_type_undecided; | |
3592 | coding->common_flags |= CODING_REQUIRE_DETECTION_MASK; | |
3593 | } | |
3594 | else | |
3595 | coding->type = coding_type_no_conversion; | |
9b96232f KH |
3596 | /* Initialize this member. Any thing other than |
3597 | CODING_CATEGORY_IDX_UTF_16_BE and | |
3598 | CODING_CATEGORY_IDX_UTF_16_LE are ok because they have | |
3599 | special treatment in detect_eol. */ | |
3600 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
3601 | ||
d46c5b12 KH |
3602 | return 0; |
3603 | } | |
3604 | ||
d46c5b12 KH |
3605 | /* Get values of coding system properties: |
3606 | `post-read-conversion', `pre-write-conversion', | |
f967223b | 3607 | `translation-table-for-decode', `translation-table-for-encode'. */ |
4608c386 | 3608 | plist = XVECTOR (coding_spec)->contents[3]; |
b843d1ae | 3609 | /* Pre & post conversion functions should be disabled if |
8ca3766a | 3610 | inhibit_eol_conversion is nonzero. This is the case that a code |
b843d1ae KH |
3611 | conversion function is called while those functions are running. */ |
3612 | if (! inhibit_pre_post_conversion) | |
3613 | { | |
3614 | coding->post_read_conversion = Fplist_get (plist, Qpost_read_conversion); | |
3615 | coding->pre_write_conversion = Fplist_get (plist, Qpre_write_conversion); | |
3616 | } | |
f967223b | 3617 | val = Fplist_get (plist, Qtranslation_table_for_decode); |
4608c386 | 3618 | if (SYMBOLP (val)) |
f967223b KH |
3619 | val = Fget (val, Qtranslation_table_for_decode); |
3620 | coding->translation_table_for_decode = CHAR_TABLE_P (val) ? val : Qnil; | |
3621 | val = Fplist_get (plist, Qtranslation_table_for_encode); | |
4608c386 | 3622 | if (SYMBOLP (val)) |
f967223b KH |
3623 | val = Fget (val, Qtranslation_table_for_encode); |
3624 | coding->translation_table_for_encode = CHAR_TABLE_P (val) ? val : Qnil; | |
d46c5b12 KH |
3625 | val = Fplist_get (plist, Qcoding_category); |
3626 | if (!NILP (val)) | |
3627 | { | |
3628 | val = Fget (val, Qcoding_category_index); | |
3629 | if (INTEGERP (val)) | |
3630 | coding->category_idx = XINT (val); | |
3631 | else | |
3632 | goto label_invalid_coding_system; | |
3633 | } | |
3634 | else | |
3635 | goto label_invalid_coding_system; | |
93dec019 | 3636 | |
ec6d2bb8 KH |
3637 | /* If the coding system has non-nil `composition' property, enable |
3638 | composition handling. */ | |
3639 | val = Fplist_get (plist, Qcomposition); | |
3640 | if (!NILP (val)) | |
3641 | coding->composing = COMPOSITION_NO; | |
3642 | ||
d46c5b12 | 3643 | switch (XFASTINT (coding_type)) |
4ed46869 KH |
3644 | { |
3645 | case 0: | |
0ef69138 | 3646 | coding->type = coding_type_emacs_mule; |
aa72b389 KH |
3647 | coding->common_flags |
3648 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
c952af22 KH |
3649 | if (!NILP (coding->post_read_conversion)) |
3650 | coding->common_flags |= CODING_REQUIRE_DECODING_MASK; | |
3651 | if (!NILP (coding->pre_write_conversion)) | |
3652 | coding->common_flags |= CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 KH |
3653 | break; |
3654 | ||
3655 | case 1: | |
3656 | coding->type = coding_type_sjis; | |
c952af22 KH |
3657 | coding->common_flags |
3658 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 KH |
3659 | break; |
3660 | ||
3661 | case 2: | |
3662 | coding->type = coding_type_iso2022; | |
c952af22 KH |
3663 | coding->common_flags |
3664 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3665 | { |
70c22245 | 3666 | Lisp_Object val, temp; |
4ed46869 | 3667 | Lisp_Object *flags; |
d46c5b12 | 3668 | int i, charset, reg_bits = 0; |
4ed46869 | 3669 | |
4608c386 | 3670 | val = XVECTOR (coding_spec)->contents[4]; |
f44d27ce | 3671 | |
4ed46869 KH |
3672 | if (!VECTORP (val) || XVECTOR (val)->size != 32) |
3673 | goto label_invalid_coding_system; | |
3674 | ||
3675 | flags = XVECTOR (val)->contents; | |
3676 | coding->flags | |
3677 | = ((NILP (flags[4]) ? 0 : CODING_FLAG_ISO_SHORT_FORM) | |
3678 | | (NILP (flags[5]) ? 0 : CODING_FLAG_ISO_RESET_AT_EOL) | |
3679 | | (NILP (flags[6]) ? 0 : CODING_FLAG_ISO_RESET_AT_CNTL) | |
3680 | | (NILP (flags[7]) ? 0 : CODING_FLAG_ISO_SEVEN_BITS) | |
3681 | | (NILP (flags[8]) ? 0 : CODING_FLAG_ISO_LOCKING_SHIFT) | |
3682 | | (NILP (flags[9]) ? 0 : CODING_FLAG_ISO_SINGLE_SHIFT) | |
3683 | | (NILP (flags[10]) ? 0 : CODING_FLAG_ISO_USE_ROMAN) | |
3684 | | (NILP (flags[11]) ? 0 : CODING_FLAG_ISO_USE_OLDJIS) | |
e0e989f6 KH |
3685 | | (NILP (flags[12]) ? 0 : CODING_FLAG_ISO_NO_DIRECTION) |
3686 | | (NILP (flags[13]) ? 0 : CODING_FLAG_ISO_INIT_AT_BOL) | |
c4825358 KH |
3687 | | (NILP (flags[14]) ? 0 : CODING_FLAG_ISO_DESIGNATE_AT_BOL) |
3688 | | (NILP (flags[15]) ? 0 : CODING_FLAG_ISO_SAFE) | |
3f003981 | 3689 | | (NILP (flags[16]) ? 0 : CODING_FLAG_ISO_LATIN_EXTRA) |
c4825358 | 3690 | ); |
4ed46869 KH |
3691 | |
3692 | /* Invoke graphic register 0 to plane 0. */ | |
3693 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; | |
3694 | /* Invoke graphic register 1 to plane 1 if we can use full 8-bit. */ | |
3695 | CODING_SPEC_ISO_INVOCATION (coding, 1) | |
3696 | = (coding->flags & CODING_FLAG_ISO_SEVEN_BITS ? -1 : 1); | |
3697 | /* Not single shifting at first. */ | |
6e85d753 | 3698 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; |
e0e989f6 | 3699 | /* Beginning of buffer should also be regarded as bol. */ |
6e85d753 | 3700 | CODING_SPEC_ISO_BOL (coding) = 1; |
4ed46869 | 3701 | |
70c22245 KH |
3702 | for (charset = 0; charset <= MAX_CHARSET; charset++) |
3703 | CODING_SPEC_ISO_REVISION_NUMBER (coding, charset) = 255; | |
3704 | val = Vcharset_revision_alist; | |
3705 | while (CONSP (val)) | |
3706 | { | |
03699b14 | 3707 | charset = get_charset_id (Fcar_safe (XCAR (val))); |
70c22245 | 3708 | if (charset >= 0 |
03699b14 | 3709 | && (temp = Fcdr_safe (XCAR (val)), INTEGERP (temp)) |
70c22245 KH |
3710 | && (i = XINT (temp), (i >= 0 && (i + '@') < 128))) |
3711 | CODING_SPEC_ISO_REVISION_NUMBER (coding, charset) = i; | |
03699b14 | 3712 | val = XCDR (val); |
70c22245 KH |
3713 | } |
3714 | ||
4ed46869 KH |
3715 | /* Checks FLAGS[REG] (REG = 0, 1, 2 3) and decide designations. |
3716 | FLAGS[REG] can be one of below: | |
3717 | integer CHARSET: CHARSET occupies register I, | |
3718 | t: designate nothing to REG initially, but can be used | |
3719 | by any charsets, | |
3720 | list of integer, nil, or t: designate the first | |
3721 | element (if integer) to REG initially, the remaining | |
3722 | elements (if integer) is designated to REG on request, | |
d46c5b12 | 3723 | if an element is t, REG can be used by any charsets, |
4ed46869 | 3724 | nil: REG is never used. */ |
467e7675 | 3725 | for (charset = 0; charset <= MAX_CHARSET; charset++) |
1ba9e4ab KH |
3726 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3727 | = CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION; | |
4ed46869 KH |
3728 | for (i = 0; i < 4; i++) |
3729 | { | |
87323294 PJ |
3730 | if ((INTEGERP (flags[i]) |
3731 | && (charset = XINT (flags[i]), CHARSET_VALID_P (charset))) | |
e0e989f6 | 3732 | || (charset = get_charset_id (flags[i])) >= 0) |
4ed46869 KH |
3733 | { |
3734 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = charset; | |
3735 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) = i; | |
3736 | } | |
3737 | else if (EQ (flags[i], Qt)) | |
3738 | { | |
3739 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
d46c5b12 KH |
3740 | reg_bits |= 1 << i; |
3741 | coding->flags |= CODING_FLAG_ISO_DESIGNATION; | |
4ed46869 KH |
3742 | } |
3743 | else if (CONSP (flags[i])) | |
3744 | { | |
84d60297 RS |
3745 | Lisp_Object tail; |
3746 | tail = flags[i]; | |
4ed46869 | 3747 | |
d46c5b12 | 3748 | coding->flags |= CODING_FLAG_ISO_DESIGNATION; |
87323294 PJ |
3749 | if ((INTEGERP (XCAR (tail)) |
3750 | && (charset = XINT (XCAR (tail)), | |
3751 | CHARSET_VALID_P (charset))) | |
03699b14 | 3752 | || (charset = get_charset_id (XCAR (tail))) >= 0) |
4ed46869 KH |
3753 | { |
3754 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = charset; | |
3755 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) =i; | |
3756 | } | |
3757 | else | |
3758 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
03699b14 | 3759 | tail = XCDR (tail); |
4ed46869 KH |
3760 | while (CONSP (tail)) |
3761 | { | |
87323294 PJ |
3762 | if ((INTEGERP (XCAR (tail)) |
3763 | && (charset = XINT (XCAR (tail)), | |
3764 | CHARSET_VALID_P (charset))) | |
03699b14 | 3765 | || (charset = get_charset_id (XCAR (tail))) >= 0) |
70c22245 KH |
3766 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3767 | = i; | |
03699b14 | 3768 | else if (EQ (XCAR (tail), Qt)) |
d46c5b12 | 3769 | reg_bits |= 1 << i; |
03699b14 | 3770 | tail = XCDR (tail); |
4ed46869 KH |
3771 | } |
3772 | } | |
3773 | else | |
3774 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
93dec019 | 3775 | |
4ed46869 KH |
3776 | CODING_SPEC_ISO_DESIGNATION (coding, i) |
3777 | = CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i); | |
3778 | } | |
3779 | ||
d46c5b12 | 3780 | if (reg_bits && ! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)) |
4ed46869 KH |
3781 | { |
3782 | /* REG 1 can be used only by locking shift in 7-bit env. */ | |
3783 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) | |
d46c5b12 | 3784 | reg_bits &= ~2; |
4ed46869 KH |
3785 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
3786 | /* Without any shifting, only REG 0 and 1 can be used. */ | |
d46c5b12 | 3787 | reg_bits &= 3; |
4ed46869 KH |
3788 | } |
3789 | ||
d46c5b12 KH |
3790 | if (reg_bits) |
3791 | for (charset = 0; charset <= MAX_CHARSET; charset++) | |
6e85d753 | 3792 | { |
928a85c1 | 3793 | if (CHARSET_DEFINED_P (charset) |
96148065 KH |
3794 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3795 | == CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION)) | |
d46c5b12 KH |
3796 | { |
3797 | /* There exist some default graphic registers to be | |
96148065 | 3798 | used by CHARSET. */ |
d46c5b12 KH |
3799 | |
3800 | /* We had better avoid designating a charset of | |
3801 | CHARS96 to REG 0 as far as possible. */ | |
3802 | if (CHARSET_CHARS (charset) == 96) | |
3803 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) | |
3804 | = (reg_bits & 2 | |
3805 | ? 1 : (reg_bits & 4 ? 2 : (reg_bits & 8 ? 3 : 0))); | |
3806 | else | |
3807 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) | |
3808 | = (reg_bits & 1 | |
3809 | ? 0 : (reg_bits & 2 ? 1 : (reg_bits & 4 ? 2 : 3))); | |
3810 | } | |
6e85d753 | 3811 | } |
4ed46869 | 3812 | } |
c952af22 | 3813 | coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK; |
d46c5b12 | 3814 | coding->spec.iso2022.last_invalid_designation_register = -1; |
4ed46869 KH |
3815 | break; |
3816 | ||
3817 | case 3: | |
3818 | coding->type = coding_type_big5; | |
c952af22 KH |
3819 | coding->common_flags |
3820 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3821 | coding->flags |
4608c386 | 3822 | = (NILP (XVECTOR (coding_spec)->contents[4]) |
4ed46869 KH |
3823 | ? CODING_FLAG_BIG5_HKU |
3824 | : CODING_FLAG_BIG5_ETEN); | |
3825 | break; | |
3826 | ||
3827 | case 4: | |
3828 | coding->type = coding_type_ccl; | |
c952af22 KH |
3829 | coding->common_flags |
3830 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3831 | { |
84d60297 | 3832 | val = XVECTOR (coding_spec)->contents[4]; |
ef4ced28 KH |
3833 | if (! CONSP (val) |
3834 | || setup_ccl_program (&(coding->spec.ccl.decoder), | |
03699b14 | 3835 | XCAR (val)) < 0 |
ef4ced28 | 3836 | || setup_ccl_program (&(coding->spec.ccl.encoder), |
03699b14 | 3837 | XCDR (val)) < 0) |
4ed46869 | 3838 | goto label_invalid_coding_system; |
1397dc18 KH |
3839 | |
3840 | bzero (coding->spec.ccl.valid_codes, 256); | |
3841 | val = Fplist_get (plist, Qvalid_codes); | |
3842 | if (CONSP (val)) | |
3843 | { | |
3844 | Lisp_Object this; | |
3845 | ||
03699b14 | 3846 | for (; CONSP (val); val = XCDR (val)) |
1397dc18 | 3847 | { |
03699b14 | 3848 | this = XCAR (val); |
1397dc18 KH |
3849 | if (INTEGERP (this) |
3850 | && XINT (this) >= 0 && XINT (this) < 256) | |
3851 | coding->spec.ccl.valid_codes[XINT (this)] = 1; | |
3852 | else if (CONSP (this) | |
03699b14 KR |
3853 | && INTEGERP (XCAR (this)) |
3854 | && INTEGERP (XCDR (this))) | |
1397dc18 | 3855 | { |
03699b14 KR |
3856 | int start = XINT (XCAR (this)); |
3857 | int end = XINT (XCDR (this)); | |
1397dc18 KH |
3858 | |
3859 | if (start >= 0 && start <= end && end < 256) | |
e133c8fa | 3860 | while (start <= end) |
1397dc18 KH |
3861 | coding->spec.ccl.valid_codes[start++] = 1; |
3862 | } | |
3863 | } | |
3864 | } | |
4ed46869 | 3865 | } |
c952af22 | 3866 | coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK; |
aaaf0b1e | 3867 | coding->spec.ccl.cr_carryover = 0; |
1c3478b0 | 3868 | coding->spec.ccl.eight_bit_carryover[0] = 0; |
4ed46869 KH |
3869 | break; |
3870 | ||
27901516 KH |
3871 | case 5: |
3872 | coding->type = coding_type_raw_text; | |
3873 | break; | |
3874 | ||
4ed46869 | 3875 | default: |
d46c5b12 | 3876 | goto label_invalid_coding_system; |
4ed46869 KH |
3877 | } |
3878 | return 0; | |
3879 | ||
3880 | label_invalid_coding_system: | |
3881 | coding->type = coding_type_no_conversion; | |
d46c5b12 | 3882 | coding->category_idx = CODING_CATEGORY_IDX_BINARY; |
c952af22 | 3883 | coding->common_flags = 0; |
dec137e5 | 3884 | coding->eol_type = CODING_EOL_LF; |
d46c5b12 | 3885 | coding->pre_write_conversion = coding->post_read_conversion = Qnil; |
4ed46869 KH |
3886 | return -1; |
3887 | } | |
3888 | ||
ec6d2bb8 KH |
3889 | /* Free memory blocks allocated for storing composition information. */ |
3890 | ||
3891 | void | |
3892 | coding_free_composition_data (coding) | |
3893 | struct coding_system *coding; | |
3894 | { | |
3895 | struct composition_data *cmp_data = coding->cmp_data, *next; | |
3896 | ||
3897 | if (!cmp_data) | |
3898 | return; | |
3899 | /* Memory blocks are chained. At first, rewind to the first, then, | |
3900 | free blocks one by one. */ | |
3901 | while (cmp_data->prev) | |
3902 | cmp_data = cmp_data->prev; | |
3903 | while (cmp_data) | |
3904 | { | |
3905 | next = cmp_data->next; | |
3906 | xfree (cmp_data); | |
3907 | cmp_data = next; | |
3908 | } | |
3909 | coding->cmp_data = NULL; | |
3910 | } | |
3911 | ||
3912 | /* Set `char_offset' member of all memory blocks pointed by | |
3913 | coding->cmp_data to POS. */ | |
3914 | ||
3915 | void | |
3916 | coding_adjust_composition_offset (coding, pos) | |
3917 | struct coding_system *coding; | |
3918 | int pos; | |
3919 | { | |
3920 | struct composition_data *cmp_data; | |
3921 | ||
3922 | for (cmp_data = coding->cmp_data; cmp_data; cmp_data = cmp_data->next) | |
3923 | cmp_data->char_offset = pos; | |
3924 | } | |
3925 | ||
54f78171 KH |
3926 | /* Setup raw-text or one of its subsidiaries in the structure |
3927 | coding_system CODING according to the already setup value eol_type | |
3928 | in CODING. CODING should be setup for some coding system in | |
3929 | advance. */ | |
3930 | ||
3931 | void | |
3932 | setup_raw_text_coding_system (coding) | |
3933 | struct coding_system *coding; | |
3934 | { | |
3935 | if (coding->type != coding_type_raw_text) | |
3936 | { | |
3937 | coding->symbol = Qraw_text; | |
3938 | coding->type = coding_type_raw_text; | |
3939 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
3940 | { | |
84d60297 RS |
3941 | Lisp_Object subsidiaries; |
3942 | subsidiaries = Fget (Qraw_text, Qeol_type); | |
54f78171 KH |
3943 | |
3944 | if (VECTORP (subsidiaries) | |
3945 | && XVECTOR (subsidiaries)->size == 3) | |
3946 | coding->symbol | |
3947 | = XVECTOR (subsidiaries)->contents[coding->eol_type]; | |
3948 | } | |
716e0b0a | 3949 | setup_coding_system (coding->symbol, coding); |
54f78171 KH |
3950 | } |
3951 | return; | |
3952 | } | |
3953 | ||
4ed46869 KH |
3954 | /* Emacs has a mechanism to automatically detect a coding system if it |
3955 | is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But, | |
3956 | it's impossible to distinguish some coding systems accurately | |
3957 | because they use the same range of codes. So, at first, coding | |
3958 | systems are categorized into 7, those are: | |
3959 | ||
0ef69138 | 3960 | o coding-category-emacs-mule |
4ed46869 KH |
3961 | |
3962 | The category for a coding system which has the same code range | |
3963 | as Emacs' internal format. Assigned the coding-system (Lisp | |
0ef69138 | 3964 | symbol) `emacs-mule' by default. |
4ed46869 KH |
3965 | |
3966 | o coding-category-sjis | |
3967 | ||
3968 | The category for a coding system which has the same code range | |
3969 | as SJIS. Assigned the coding-system (Lisp | |
7717c392 | 3970 | symbol) `japanese-shift-jis' by default. |
4ed46869 KH |
3971 | |
3972 | o coding-category-iso-7 | |
3973 | ||
3974 | The category for a coding system which has the same code range | |
7717c392 | 3975 | as ISO2022 of 7-bit environment. This doesn't use any locking |
d46c5b12 KH |
3976 | shift and single shift functions. This can encode/decode all |
3977 | charsets. Assigned the coding-system (Lisp symbol) | |
3978 | `iso-2022-7bit' by default. | |
3979 | ||
3980 | o coding-category-iso-7-tight | |
3981 | ||
3982 | Same as coding-category-iso-7 except that this can | |
3983 | encode/decode only the specified charsets. | |
4ed46869 KH |
3984 | |
3985 | o coding-category-iso-8-1 | |
3986 | ||
3987 | The category for a coding system which has the same code range | |
3988 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
3989 | for DIMENSION1 charset. This doesn't use any locking shift |
3990 | and single shift functions. Assigned the coding-system (Lisp | |
3991 | symbol) `iso-latin-1' by default. | |
4ed46869 KH |
3992 | |
3993 | o coding-category-iso-8-2 | |
3994 | ||
3995 | The category for a coding system which has the same code range | |
3996 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
3997 | for DIMENSION2 charset. This doesn't use any locking shift |
3998 | and single shift functions. Assigned the coding-system (Lisp | |
3999 | symbol) `japanese-iso-8bit' by default. | |
4ed46869 | 4000 | |
7717c392 | 4001 | o coding-category-iso-7-else |
4ed46869 KH |
4002 | |
4003 | The category for a coding system which has the same code range | |
8ca3766a | 4004 | as ISO2022 of 7-bit environment but uses locking shift or |
7717c392 KH |
4005 | single shift functions. Assigned the coding-system (Lisp |
4006 | symbol) `iso-2022-7bit-lock' by default. | |
4007 | ||
4008 | o coding-category-iso-8-else | |
4009 | ||
4010 | The category for a coding system which has the same code range | |
8ca3766a | 4011 | as ISO2022 of 8-bit environment but uses locking shift or |
7717c392 KH |
4012 | single shift functions. Assigned the coding-system (Lisp |
4013 | symbol) `iso-2022-8bit-ss2' by default. | |
4ed46869 KH |
4014 | |
4015 | o coding-category-big5 | |
4016 | ||
4017 | The category for a coding system which has the same code range | |
4018 | as BIG5. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 4019 | `cn-big5' by default. |
4ed46869 | 4020 | |
fa42c37f KH |
4021 | o coding-category-utf-8 |
4022 | ||
4023 | The category for a coding system which has the same code range | |
4024 | as UTF-8 (cf. RFC2279). Assigned the coding-system (Lisp | |
4025 | symbol) `utf-8' by default. | |
4026 | ||
4027 | o coding-category-utf-16-be | |
4028 | ||
4029 | The category for a coding system in which a text has an | |
4030 | Unicode signature (cf. Unicode Standard) in the order of BIG | |
4031 | endian at the head. Assigned the coding-system (Lisp symbol) | |
4032 | `utf-16-be' by default. | |
4033 | ||
4034 | o coding-category-utf-16-le | |
4035 | ||
4036 | The category for a coding system in which a text has an | |
4037 | Unicode signature (cf. Unicode Standard) in the order of | |
4038 | LITTLE endian at the head. Assigned the coding-system (Lisp | |
4039 | symbol) `utf-16-le' by default. | |
4040 | ||
1397dc18 KH |
4041 | o coding-category-ccl |
4042 | ||
4043 | The category for a coding system of which encoder/decoder is | |
4044 | written in CCL programs. The default value is nil, i.e., no | |
4045 | coding system is assigned. | |
4046 | ||
4ed46869 KH |
4047 | o coding-category-binary |
4048 | ||
4049 | The category for a coding system not categorized in any of the | |
4050 | above. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 4051 | `no-conversion' by default. |
4ed46869 KH |
4052 | |
4053 | Each of them is a Lisp symbol and the value is an actual | |
cfb43547 | 4054 | `coding-system' (this is also a Lisp symbol) assigned by a user. |
4ed46869 KH |
4055 | What Emacs does actually is to detect a category of coding system. |
4056 | Then, it uses a `coding-system' assigned to it. If Emacs can't | |
cfb43547 | 4057 | decide a single possible category, it selects a category of the |
4ed46869 KH |
4058 | highest priority. Priorities of categories are also specified by a |
4059 | user in a Lisp variable `coding-category-list'. | |
4060 | ||
4061 | */ | |
4062 | ||
66cfb530 KH |
4063 | static |
4064 | int ascii_skip_code[256]; | |
4065 | ||
d46c5b12 | 4066 | /* Detect how a text of length SRC_BYTES pointed by SOURCE is encoded. |
4ed46869 KH |
4067 | If it detects possible coding systems, return an integer in which |
4068 | appropriate flag bits are set. Flag bits are defined by macros | |
fa42c37f KH |
4069 | CODING_CATEGORY_MASK_XXX in `coding.h'. If PRIORITIES is non-NULL, |
4070 | it should point the table `coding_priorities'. In that case, only | |
4071 | the flag bit for a coding system of the highest priority is set in | |
0a28aafb KH |
4072 | the returned value. If MULTIBYTEP is nonzero, 8-bit codes of the |
4073 | range 0x80..0x9F are in multibyte form. | |
4ed46869 | 4074 | |
d46c5b12 KH |
4075 | How many ASCII characters are at the head is returned as *SKIP. */ |
4076 | ||
4077 | static int | |
0a28aafb | 4078 | detect_coding_mask (source, src_bytes, priorities, skip, multibytep) |
d46c5b12 KH |
4079 | unsigned char *source; |
4080 | int src_bytes, *priorities, *skip; | |
0a28aafb | 4081 | int multibytep; |
4ed46869 KH |
4082 | { |
4083 | register unsigned char c; | |
d46c5b12 | 4084 | unsigned char *src = source, *src_end = source + src_bytes; |
fa42c37f | 4085 | unsigned int mask, utf16_examined_p, iso2022_examined_p; |
da55a2b7 | 4086 | int i; |
4ed46869 KH |
4087 | |
4088 | /* At first, skip all ASCII characters and control characters except | |
4089 | for three ISO2022 specific control characters. */ | |
66cfb530 KH |
4090 | ascii_skip_code[ISO_CODE_SO] = 0; |
4091 | ascii_skip_code[ISO_CODE_SI] = 0; | |
4092 | ascii_skip_code[ISO_CODE_ESC] = 0; | |
4093 | ||
bcf26d6a | 4094 | label_loop_detect_coding: |
66cfb530 | 4095 | while (src < src_end && ascii_skip_code[*src]) src++; |
d46c5b12 | 4096 | *skip = src - source; |
4ed46869 KH |
4097 | |
4098 | if (src >= src_end) | |
4099 | /* We found nothing other than ASCII. There's nothing to do. */ | |
d46c5b12 | 4100 | return 0; |
4ed46869 | 4101 | |
8a8147d6 | 4102 | c = *src; |
4ed46869 KH |
4103 | /* The text seems to be encoded in some multilingual coding system. |
4104 | Now, try to find in which coding system the text is encoded. */ | |
4105 | if (c < 0x80) | |
bcf26d6a KH |
4106 | { |
4107 | /* i.e. (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) */ | |
4108 | /* C is an ISO2022 specific control code of C0. */ | |
0a28aafb | 4109 | mask = detect_coding_iso2022 (src, src_end, multibytep); |
1b2af4b0 | 4110 | if (mask == 0) |
d46c5b12 KH |
4111 | { |
4112 | /* No valid ISO2022 code follows C. Try again. */ | |
4113 | src++; | |
66cfb530 KH |
4114 | if (c == ISO_CODE_ESC) |
4115 | ascii_skip_code[ISO_CODE_ESC] = 1; | |
4116 | else | |
4117 | ascii_skip_code[ISO_CODE_SO] = ascii_skip_code[ISO_CODE_SI] = 1; | |
d46c5b12 KH |
4118 | goto label_loop_detect_coding; |
4119 | } | |
4120 | if (priorities) | |
fa42c37f KH |
4121 | { |
4122 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
4123 | { | |
4124 | if (mask & priorities[i]) | |
4125 | return priorities[i]; | |
4126 | } | |
4127 | return CODING_CATEGORY_MASK_RAW_TEXT; | |
4128 | } | |
bcf26d6a | 4129 | } |
d46c5b12 | 4130 | else |
c4825358 | 4131 | { |
d46c5b12 | 4132 | int try; |
4ed46869 | 4133 | |
0a28aafb | 4134 | if (multibytep && c == LEADING_CODE_8_BIT_CONTROL) |
67091e59 | 4135 | c = src[1] - 0x20; |
0a28aafb | 4136 | |
d46c5b12 KH |
4137 | if (c < 0xA0) |
4138 | { | |
4139 | /* C is the first byte of SJIS character code, | |
fa42c37f KH |
4140 | or a leading-code of Emacs' internal format (emacs-mule), |
4141 | or the first byte of UTF-16. */ | |
4142 | try = (CODING_CATEGORY_MASK_SJIS | |
4143 | | CODING_CATEGORY_MASK_EMACS_MULE | |
4144 | | CODING_CATEGORY_MASK_UTF_16_BE | |
4145 | | CODING_CATEGORY_MASK_UTF_16_LE); | |
d46c5b12 KH |
4146 | |
4147 | /* Or, if C is a special latin extra code, | |
93dec019 | 4148 | or is an ISO2022 specific control code of C1 (SS2 or SS3), |
d46c5b12 KH |
4149 | or is an ISO2022 control-sequence-introducer (CSI), |
4150 | we should also consider the possibility of ISO2022 codings. */ | |
4151 | if ((VECTORP (Vlatin_extra_code_table) | |
4152 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
4153 | || (c == ISO_CODE_SS2 || c == ISO_CODE_SS3) | |
4154 | || (c == ISO_CODE_CSI | |
4155 | && (src < src_end | |
4156 | && (*src == ']' | |
4157 | || ((*src == '0' || *src == '1' || *src == '2') | |
4158 | && src + 1 < src_end | |
4159 | && src[1] == ']'))))) | |
4160 | try |= (CODING_CATEGORY_MASK_ISO_8_ELSE | |
4161 | | CODING_CATEGORY_MASK_ISO_8BIT); | |
4162 | } | |
c4825358 | 4163 | else |
d46c5b12 KH |
4164 | /* C is a character of ISO2022 in graphic plane right, |
4165 | or a SJIS's 1-byte character code (i.e. JISX0201), | |
fa42c37f KH |
4166 | or the first byte of BIG5's 2-byte code, |
4167 | or the first byte of UTF-8/16. */ | |
d46c5b12 KH |
4168 | try = (CODING_CATEGORY_MASK_ISO_8_ELSE |
4169 | | CODING_CATEGORY_MASK_ISO_8BIT | |
4170 | | CODING_CATEGORY_MASK_SJIS | |
fa42c37f KH |
4171 | | CODING_CATEGORY_MASK_BIG5 |
4172 | | CODING_CATEGORY_MASK_UTF_8 | |
4173 | | CODING_CATEGORY_MASK_UTF_16_BE | |
4174 | | CODING_CATEGORY_MASK_UTF_16_LE); | |
d46c5b12 | 4175 | |
1397dc18 KH |
4176 | /* Or, we may have to consider the possibility of CCL. */ |
4177 | if (coding_system_table[CODING_CATEGORY_IDX_CCL] | |
4178 | && (coding_system_table[CODING_CATEGORY_IDX_CCL] | |
4179 | ->spec.ccl.valid_codes)[c]) | |
4180 | try |= CODING_CATEGORY_MASK_CCL; | |
4181 | ||
d46c5b12 | 4182 | mask = 0; |
fa42c37f | 4183 | utf16_examined_p = iso2022_examined_p = 0; |
d46c5b12 KH |
4184 | if (priorities) |
4185 | { | |
4186 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
4187 | { | |
fa42c37f KH |
4188 | if (!iso2022_examined_p |
4189 | && (priorities[i] & try & CODING_CATEGORY_MASK_ISO)) | |
4190 | { | |
0192762c | 4191 | mask |= detect_coding_iso2022 (src, src_end, multibytep); |
fa42c37f KH |
4192 | iso2022_examined_p = 1; |
4193 | } | |
5ab13dd0 | 4194 | else if (priorities[i] & try & CODING_CATEGORY_MASK_SJIS) |
0a28aafb | 4195 | mask |= detect_coding_sjis (src, src_end, multibytep); |
fa42c37f | 4196 | else if (priorities[i] & try & CODING_CATEGORY_MASK_UTF_8) |
0a28aafb | 4197 | mask |= detect_coding_utf_8 (src, src_end, multibytep); |
fa42c37f KH |
4198 | else if (!utf16_examined_p |
4199 | && (priorities[i] & try & | |
4200 | CODING_CATEGORY_MASK_UTF_16_BE_LE)) | |
4201 | { | |
0a28aafb | 4202 | mask |= detect_coding_utf_16 (src, src_end, multibytep); |
fa42c37f KH |
4203 | utf16_examined_p = 1; |
4204 | } | |
5ab13dd0 | 4205 | else if (priorities[i] & try & CODING_CATEGORY_MASK_BIG5) |
0a28aafb | 4206 | mask |= detect_coding_big5 (src, src_end, multibytep); |
5ab13dd0 | 4207 | else if (priorities[i] & try & CODING_CATEGORY_MASK_EMACS_MULE) |
0a28aafb | 4208 | mask |= detect_coding_emacs_mule (src, src_end, multibytep); |
89fa8b36 | 4209 | else if (priorities[i] & try & CODING_CATEGORY_MASK_CCL) |
0a28aafb | 4210 | mask |= detect_coding_ccl (src, src_end, multibytep); |
5ab13dd0 | 4211 | else if (priorities[i] & CODING_CATEGORY_MASK_RAW_TEXT) |
fa42c37f | 4212 | mask |= CODING_CATEGORY_MASK_RAW_TEXT; |
5ab13dd0 | 4213 | else if (priorities[i] & CODING_CATEGORY_MASK_BINARY) |
fa42c37f KH |
4214 | mask |= CODING_CATEGORY_MASK_BINARY; |
4215 | if (mask & priorities[i]) | |
4216 | return priorities[i]; | |
d46c5b12 KH |
4217 | } |
4218 | return CODING_CATEGORY_MASK_RAW_TEXT; | |
4219 | } | |
4220 | if (try & CODING_CATEGORY_MASK_ISO) | |
0a28aafb | 4221 | mask |= detect_coding_iso2022 (src, src_end, multibytep); |
d46c5b12 | 4222 | if (try & CODING_CATEGORY_MASK_SJIS) |
0a28aafb | 4223 | mask |= detect_coding_sjis (src, src_end, multibytep); |
d46c5b12 | 4224 | if (try & CODING_CATEGORY_MASK_BIG5) |
0a28aafb | 4225 | mask |= detect_coding_big5 (src, src_end, multibytep); |
fa42c37f | 4226 | if (try & CODING_CATEGORY_MASK_UTF_8) |
0a28aafb | 4227 | mask |= detect_coding_utf_8 (src, src_end, multibytep); |
fa42c37f | 4228 | if (try & CODING_CATEGORY_MASK_UTF_16_BE_LE) |
0a28aafb | 4229 | mask |= detect_coding_utf_16 (src, src_end, multibytep); |
d46c5b12 | 4230 | if (try & CODING_CATEGORY_MASK_EMACS_MULE) |
0a28aafb | 4231 | mask |= detect_coding_emacs_mule (src, src_end, multibytep); |
1397dc18 | 4232 | if (try & CODING_CATEGORY_MASK_CCL) |
0a28aafb | 4233 | mask |= detect_coding_ccl (src, src_end, multibytep); |
c4825358 | 4234 | } |
5ab13dd0 | 4235 | return (mask | CODING_CATEGORY_MASK_RAW_TEXT | CODING_CATEGORY_MASK_BINARY); |
4ed46869 KH |
4236 | } |
4237 | ||
4238 | /* Detect how a text of length SRC_BYTES pointed by SRC is encoded. | |
4239 | The information of the detected coding system is set in CODING. */ | |
4240 | ||
4241 | void | |
4242 | detect_coding (coding, src, src_bytes) | |
4243 | struct coding_system *coding; | |
a4244313 | 4244 | const unsigned char *src; |
4ed46869 KH |
4245 | int src_bytes; |
4246 | { | |
d46c5b12 | 4247 | unsigned int idx; |
da55a2b7 | 4248 | int skip, mask; |
84d60297 | 4249 | Lisp_Object val; |
4ed46869 | 4250 | |
84d60297 | 4251 | val = Vcoding_category_list; |
64c1e55f KH |
4252 | mask = detect_coding_mask (src, src_bytes, coding_priorities, &skip, |
4253 | coding->src_multibyte); | |
d46c5b12 | 4254 | coding->heading_ascii = skip; |
4ed46869 | 4255 | |
d46c5b12 KH |
4256 | if (!mask) return; |
4257 | ||
4258 | /* We found a single coding system of the highest priority in MASK. */ | |
4259 | idx = 0; | |
4260 | while (mask && ! (mask & 1)) mask >>= 1, idx++; | |
4261 | if (! mask) | |
4262 | idx = CODING_CATEGORY_IDX_RAW_TEXT; | |
4ed46869 | 4263 | |
f5c1dd0d | 4264 | val = SYMBOL_VALUE (XVECTOR (Vcoding_category_table)->contents[idx]); |
d46c5b12 KH |
4265 | |
4266 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
27901516 | 4267 | { |
84d60297 | 4268 | Lisp_Object tmp; |
d46c5b12 | 4269 | |
84d60297 | 4270 | tmp = Fget (val, Qeol_type); |
d46c5b12 KH |
4271 | if (VECTORP (tmp)) |
4272 | val = XVECTOR (tmp)->contents[coding->eol_type]; | |
4ed46869 | 4273 | } |
b73bfc1c KH |
4274 | |
4275 | /* Setup this new coding system while preserving some slots. */ | |
4276 | { | |
4277 | int src_multibyte = coding->src_multibyte; | |
4278 | int dst_multibyte = coding->dst_multibyte; | |
4279 | ||
4280 | setup_coding_system (val, coding); | |
4281 | coding->src_multibyte = src_multibyte; | |
4282 | coding->dst_multibyte = dst_multibyte; | |
4283 | coding->heading_ascii = skip; | |
4284 | } | |
4ed46869 KH |
4285 | } |
4286 | ||
d46c5b12 KH |
4287 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by |
4288 | SOURCE is encoded. Return one of CODING_EOL_LF, CODING_EOL_CRLF, | |
4289 | CODING_EOL_CR, and CODING_EOL_UNDECIDED. | |
4290 | ||
4291 | How many non-eol characters are at the head is returned as *SKIP. */ | |
4ed46869 | 4292 | |
bc4bc72a RS |
4293 | #define MAX_EOL_CHECK_COUNT 3 |
4294 | ||
d46c5b12 KH |
4295 | static int |
4296 | detect_eol_type (source, src_bytes, skip) | |
4297 | unsigned char *source; | |
4298 | int src_bytes, *skip; | |
4ed46869 | 4299 | { |
d46c5b12 | 4300 | unsigned char *src = source, *src_end = src + src_bytes; |
4ed46869 | 4301 | unsigned char c; |
bc4bc72a RS |
4302 | int total = 0; /* How many end-of-lines are found so far. */ |
4303 | int eol_type = CODING_EOL_UNDECIDED; | |
4304 | int this_eol_type; | |
4ed46869 | 4305 | |
d46c5b12 KH |
4306 | *skip = 0; |
4307 | ||
bc4bc72a | 4308 | while (src < src_end && total < MAX_EOL_CHECK_COUNT) |
4ed46869 KH |
4309 | { |
4310 | c = *src++; | |
bc4bc72a | 4311 | if (c == '\n' || c == '\r') |
4ed46869 | 4312 | { |
d46c5b12 KH |
4313 | if (*skip == 0) |
4314 | *skip = src - 1 - source; | |
bc4bc72a RS |
4315 | total++; |
4316 | if (c == '\n') | |
4317 | this_eol_type = CODING_EOL_LF; | |
4318 | else if (src >= src_end || *src != '\n') | |
4319 | this_eol_type = CODING_EOL_CR; | |
4ed46869 | 4320 | else |
bc4bc72a RS |
4321 | this_eol_type = CODING_EOL_CRLF, src++; |
4322 | ||
4323 | if (eol_type == CODING_EOL_UNDECIDED) | |
4324 | /* This is the first end-of-line. */ | |
4325 | eol_type = this_eol_type; | |
4326 | else if (eol_type != this_eol_type) | |
d46c5b12 KH |
4327 | { |
4328 | /* The found type is different from what found before. */ | |
4329 | eol_type = CODING_EOL_INCONSISTENT; | |
4330 | break; | |
4331 | } | |
4ed46869 KH |
4332 | } |
4333 | } | |
bc4bc72a | 4334 | |
d46c5b12 KH |
4335 | if (*skip == 0) |
4336 | *skip = src_end - source; | |
85a02ca4 | 4337 | return eol_type; |
4ed46869 KH |
4338 | } |
4339 | ||
fa42c37f KH |
4340 | /* Like detect_eol_type, but detect EOL type in 2-octet |
4341 | big-endian/little-endian format for coding systems utf-16-be and | |
4342 | utf-16-le. */ | |
4343 | ||
4344 | static int | |
4345 | detect_eol_type_in_2_octet_form (source, src_bytes, skip, big_endian_p) | |
4346 | unsigned char *source; | |
cfb43547 | 4347 | int src_bytes, *skip, big_endian_p; |
fa42c37f KH |
4348 | { |
4349 | unsigned char *src = source, *src_end = src + src_bytes; | |
4350 | unsigned int c1, c2; | |
4351 | int total = 0; /* How many end-of-lines are found so far. */ | |
4352 | int eol_type = CODING_EOL_UNDECIDED; | |
4353 | int this_eol_type; | |
4354 | int msb, lsb; | |
4355 | ||
4356 | if (big_endian_p) | |
4357 | msb = 0, lsb = 1; | |
4358 | else | |
4359 | msb = 1, lsb = 0; | |
4360 | ||
4361 | *skip = 0; | |
4362 | ||
4363 | while ((src + 1) < src_end && total < MAX_EOL_CHECK_COUNT) | |
4364 | { | |
4365 | c1 = (src[msb] << 8) | (src[lsb]); | |
4366 | src += 2; | |
4367 | ||
4368 | if (c1 == '\n' || c1 == '\r') | |
4369 | { | |
4370 | if (*skip == 0) | |
4371 | *skip = src - 2 - source; | |
4372 | total++; | |
4373 | if (c1 == '\n') | |
4374 | { | |
4375 | this_eol_type = CODING_EOL_LF; | |
4376 | } | |
4377 | else | |
4378 | { | |
4379 | if ((src + 1) >= src_end) | |
4380 | { | |
4381 | this_eol_type = CODING_EOL_CR; | |
4382 | } | |
4383 | else | |
4384 | { | |
4385 | c2 = (src[msb] << 8) | (src[lsb]); | |
4386 | if (c2 == '\n') | |
4387 | this_eol_type = CODING_EOL_CRLF, src += 2; | |
4388 | else | |
4389 | this_eol_type = CODING_EOL_CR; | |
4390 | } | |
4391 | } | |
4392 | ||
4393 | if (eol_type == CODING_EOL_UNDECIDED) | |
4394 | /* This is the first end-of-line. */ | |
4395 | eol_type = this_eol_type; | |
4396 | else if (eol_type != this_eol_type) | |
4397 | { | |
4398 | /* The found type is different from what found before. */ | |
4399 | eol_type = CODING_EOL_INCONSISTENT; | |
4400 | break; | |
4401 | } | |
4402 | } | |
4403 | } | |
4404 | ||
4405 | if (*skip == 0) | |
4406 | *skip = src_end - source; | |
4407 | return eol_type; | |
4408 | } | |
4409 | ||
4ed46869 KH |
4410 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by SRC |
4411 | is encoded. If it detects an appropriate format of end-of-line, it | |
4412 | sets the information in *CODING. */ | |
4413 | ||
4414 | void | |
4415 | detect_eol (coding, src, src_bytes) | |
4416 | struct coding_system *coding; | |
a4244313 | 4417 | const unsigned char *src; |
4ed46869 KH |
4418 | int src_bytes; |
4419 | { | |
4608c386 | 4420 | Lisp_Object val; |
d46c5b12 | 4421 | int skip; |
fa42c37f KH |
4422 | int eol_type; |
4423 | ||
4424 | switch (coding->category_idx) | |
4425 | { | |
4426 | case CODING_CATEGORY_IDX_UTF_16_BE: | |
4427 | eol_type = detect_eol_type_in_2_octet_form (src, src_bytes, &skip, 1); | |
4428 | break; | |
4429 | case CODING_CATEGORY_IDX_UTF_16_LE: | |
4430 | eol_type = detect_eol_type_in_2_octet_form (src, src_bytes, &skip, 0); | |
4431 | break; | |
4432 | default: | |
4433 | eol_type = detect_eol_type (src, src_bytes, &skip); | |
4434 | break; | |
4435 | } | |
d46c5b12 KH |
4436 | |
4437 | if (coding->heading_ascii > skip) | |
4438 | coding->heading_ascii = skip; | |
4439 | else | |
4440 | skip = coding->heading_ascii; | |
4ed46869 | 4441 | |
0ef69138 | 4442 | if (eol_type == CODING_EOL_UNDECIDED) |
4ed46869 | 4443 | return; |
27901516 KH |
4444 | if (eol_type == CODING_EOL_INCONSISTENT) |
4445 | { | |
4446 | #if 0 | |
4447 | /* This code is suppressed until we find a better way to | |
992f23f2 | 4448 | distinguish raw text file and binary file. */ |
27901516 KH |
4449 | |
4450 | /* If we have already detected that the coding is raw-text, the | |
4451 | coding should actually be no-conversion. */ | |
4452 | if (coding->type == coding_type_raw_text) | |
4453 | { | |
4454 | setup_coding_system (Qno_conversion, coding); | |
4455 | return; | |
4456 | } | |
4457 | /* Else, let's decode only text code anyway. */ | |
4458 | #endif /* 0 */ | |
1b2af4b0 | 4459 | eol_type = CODING_EOL_LF; |
27901516 KH |
4460 | } |
4461 | ||
4608c386 | 4462 | val = Fget (coding->symbol, Qeol_type); |
4ed46869 | 4463 | if (VECTORP (val) && XVECTOR (val)->size == 3) |
d46c5b12 | 4464 | { |
b73bfc1c KH |
4465 | int src_multibyte = coding->src_multibyte; |
4466 | int dst_multibyte = coding->dst_multibyte; | |
1cd6b64c | 4467 | struct composition_data *cmp_data = coding->cmp_data; |
b73bfc1c | 4468 | |
d46c5b12 | 4469 | setup_coding_system (XVECTOR (val)->contents[eol_type], coding); |
b73bfc1c KH |
4470 | coding->src_multibyte = src_multibyte; |
4471 | coding->dst_multibyte = dst_multibyte; | |
d46c5b12 | 4472 | coding->heading_ascii = skip; |
1cd6b64c | 4473 | coding->cmp_data = cmp_data; |
d46c5b12 KH |
4474 | } |
4475 | } | |
4476 | ||
4477 | #define CONVERSION_BUFFER_EXTRA_ROOM 256 | |
4478 | ||
b73bfc1c KH |
4479 | #define DECODING_BUFFER_MAG(coding) \ |
4480 | (coding->type == coding_type_iso2022 \ | |
4481 | ? 3 \ | |
4482 | : (coding->type == coding_type_ccl \ | |
4483 | ? coding->spec.ccl.decoder.buf_magnification \ | |
4484 | : 2)) | |
d46c5b12 KH |
4485 | |
4486 | /* Return maximum size (bytes) of a buffer enough for decoding | |
4487 | SRC_BYTES of text encoded in CODING. */ | |
4488 | ||
4489 | int | |
4490 | decoding_buffer_size (coding, src_bytes) | |
4491 | struct coding_system *coding; | |
4492 | int src_bytes; | |
4493 | { | |
4494 | return (src_bytes * DECODING_BUFFER_MAG (coding) | |
4495 | + CONVERSION_BUFFER_EXTRA_ROOM); | |
4496 | } | |
4497 | ||
4498 | /* Return maximum size (bytes) of a buffer enough for encoding | |
4499 | SRC_BYTES of text to CODING. */ | |
4500 | ||
4501 | int | |
4502 | encoding_buffer_size (coding, src_bytes) | |
4503 | struct coding_system *coding; | |
4504 | int src_bytes; | |
4505 | { | |
4506 | int magnification; | |
4507 | ||
4508 | if (coding->type == coding_type_ccl) | |
a84f1519 KH |
4509 | { |
4510 | magnification = coding->spec.ccl.encoder.buf_magnification; | |
4511 | if (coding->eol_type == CODING_EOL_CRLF) | |
4512 | magnification *= 2; | |
4513 | } | |
b73bfc1c | 4514 | else if (CODING_REQUIRE_ENCODING (coding)) |
d46c5b12 | 4515 | magnification = 3; |
b73bfc1c KH |
4516 | else |
4517 | magnification = 1; | |
d46c5b12 KH |
4518 | |
4519 | return (src_bytes * magnification + CONVERSION_BUFFER_EXTRA_ROOM); | |
4520 | } | |
4521 | ||
73be902c KH |
4522 | /* Working buffer for code conversion. */ |
4523 | struct conversion_buffer | |
4524 | { | |
4525 | int size; /* size of data. */ | |
4526 | int on_stack; /* 1 if allocated by alloca. */ | |
4527 | unsigned char *data; | |
4528 | }; | |
d46c5b12 | 4529 | |
73be902c KH |
4530 | /* Don't use alloca for allocating memory space larger than this, lest |
4531 | we overflow their stack. */ | |
4532 | #define MAX_ALLOCA 16*1024 | |
d46c5b12 | 4533 | |
73be902c KH |
4534 | /* Allocate LEN bytes of memory for BUF (struct conversion_buffer). */ |
4535 | #define allocate_conversion_buffer(buf, len) \ | |
4536 | do { \ | |
4537 | if (len < MAX_ALLOCA) \ | |
4538 | { \ | |
4539 | buf.data = (unsigned char *) alloca (len); \ | |
4540 | buf.on_stack = 1; \ | |
4541 | } \ | |
4542 | else \ | |
4543 | { \ | |
4544 | buf.data = (unsigned char *) xmalloc (len); \ | |
4545 | buf.on_stack = 0; \ | |
4546 | } \ | |
4547 | buf.size = len; \ | |
4548 | } while (0) | |
d46c5b12 | 4549 | |
73be902c KH |
4550 | /* Double the allocated memory for *BUF. */ |
4551 | static void | |
4552 | extend_conversion_buffer (buf) | |
4553 | struct conversion_buffer *buf; | |
d46c5b12 | 4554 | { |
73be902c | 4555 | if (buf->on_stack) |
d46c5b12 | 4556 | { |
73be902c KH |
4557 | unsigned char *save = buf->data; |
4558 | buf->data = (unsigned char *) xmalloc (buf->size * 2); | |
4559 | bcopy (save, buf->data, buf->size); | |
4560 | buf->on_stack = 0; | |
d46c5b12 | 4561 | } |
73be902c KH |
4562 | else |
4563 | { | |
4564 | buf->data = (unsigned char *) xrealloc (buf->data, buf->size * 2); | |
4565 | } | |
4566 | buf->size *= 2; | |
4567 | } | |
4568 | ||
4569 | /* Free the allocated memory for BUF if it is not on stack. */ | |
4570 | static void | |
4571 | free_conversion_buffer (buf) | |
4572 | struct conversion_buffer *buf; | |
4573 | { | |
4574 | if (!buf->on_stack) | |
4575 | xfree (buf->data); | |
d46c5b12 KH |
4576 | } |
4577 | ||
4578 | int | |
4579 | ccl_coding_driver (coding, source, destination, src_bytes, dst_bytes, encodep) | |
4580 | struct coding_system *coding; | |
4581 | unsigned char *source, *destination; | |
4582 | int src_bytes, dst_bytes, encodep; | |
4583 | { | |
4584 | struct ccl_program *ccl | |
4585 | = encodep ? &coding->spec.ccl.encoder : &coding->spec.ccl.decoder; | |
1c3478b0 | 4586 | unsigned char *dst = destination; |
d46c5b12 | 4587 | |
bd64290d | 4588 | ccl->suppress_error = coding->suppress_error; |
ae9ff118 | 4589 | ccl->last_block = coding->mode & CODING_MODE_LAST_BLOCK; |
aaaf0b1e | 4590 | if (encodep) |
80e0ca99 KH |
4591 | { |
4592 | /* On encoding, EOL format is converted within ccl_driver. For | |
4593 | that, setup proper information in the structure CCL. */ | |
4594 | ccl->eol_type = coding->eol_type; | |
4595 | if (ccl->eol_type ==CODING_EOL_UNDECIDED) | |
4596 | ccl->eol_type = CODING_EOL_LF; | |
4597 | ccl->cr_consumed = coding->spec.ccl.cr_carryover; | |
b671ed5e | 4598 | ccl->eight_bit_control = coding->dst_multibyte; |
80e0ca99 | 4599 | } |
b671ed5e KH |
4600 | else |
4601 | ccl->eight_bit_control = 1; | |
7272d75c | 4602 | ccl->multibyte = coding->src_multibyte; |
1c3478b0 KH |
4603 | if (coding->spec.ccl.eight_bit_carryover[0] != 0) |
4604 | { | |
4605 | /* Move carryover bytes to DESTINATION. */ | |
4606 | unsigned char *p = coding->spec.ccl.eight_bit_carryover; | |
4607 | while (*p) | |
4608 | *dst++ = *p++; | |
4609 | coding->spec.ccl.eight_bit_carryover[0] = 0; | |
4610 | if (dst_bytes) | |
4611 | dst_bytes -= dst - destination; | |
4612 | } | |
4613 | ||
4614 | coding->produced = (ccl_driver (ccl, source, dst, src_bytes, dst_bytes, | |
4615 | &(coding->consumed)) | |
4616 | + dst - destination); | |
4617 | ||
b73bfc1c | 4618 | if (encodep) |
80e0ca99 KH |
4619 | { |
4620 | coding->produced_char = coding->produced; | |
4621 | coding->spec.ccl.cr_carryover = ccl->cr_consumed; | |
4622 | } | |
ade8d05e KH |
4623 | else if (!ccl->eight_bit_control) |
4624 | { | |
4625 | /* The produced bytes forms a valid multibyte sequence. */ | |
4626 | coding->produced_char | |
4627 | = multibyte_chars_in_text (destination, coding->produced); | |
4628 | coding->spec.ccl.eight_bit_carryover[0] = 0; | |
4629 | } | |
b73bfc1c KH |
4630 | else |
4631 | { | |
1c3478b0 KH |
4632 | /* On decoding, the destination should always multibyte. But, |
4633 | CCL program might have been generated an invalid multibyte | |
4634 | sequence. Here we make such a sequence valid as | |
4635 | multibyte. */ | |
b73bfc1c KH |
4636 | int bytes |
4637 | = dst_bytes ? dst_bytes : source + coding->consumed - destination; | |
1c3478b0 KH |
4638 | |
4639 | if ((coding->consumed < src_bytes | |
4640 | || !ccl->last_block) | |
4641 | && coding->produced >= 1 | |
4642 | && destination[coding->produced - 1] >= 0x80) | |
4643 | { | |
4644 | /* We should not convert the tailing 8-bit codes to | |
4645 | multibyte form even if they doesn't form a valid | |
4646 | multibyte sequence. They may form a valid sequence in | |
4647 | the next call. */ | |
4648 | int carryover = 0; | |
4649 | ||
4650 | if (destination[coding->produced - 1] < 0xA0) | |
4651 | carryover = 1; | |
4652 | else if (coding->produced >= 2) | |
4653 | { | |
4654 | if (destination[coding->produced - 2] >= 0x80) | |
4655 | { | |
4656 | if (destination[coding->produced - 2] < 0xA0) | |
4657 | carryover = 2; | |
4658 | else if (coding->produced >= 3 | |
4659 | && destination[coding->produced - 3] >= 0x80 | |
4660 | && destination[coding->produced - 3] < 0xA0) | |
4661 | carryover = 3; | |
4662 | } | |
4663 | } | |
4664 | if (carryover > 0) | |
4665 | { | |
4666 | BCOPY_SHORT (destination + coding->produced - carryover, | |
4667 | coding->spec.ccl.eight_bit_carryover, | |
4668 | carryover); | |
4669 | coding->spec.ccl.eight_bit_carryover[carryover] = 0; | |
4670 | coding->produced -= carryover; | |
4671 | } | |
4672 | } | |
b73bfc1c KH |
4673 | coding->produced = str_as_multibyte (destination, bytes, |
4674 | coding->produced, | |
4675 | &(coding->produced_char)); | |
4676 | } | |
69f76525 | 4677 | |
d46c5b12 KH |
4678 | switch (ccl->status) |
4679 | { | |
4680 | case CCL_STAT_SUSPEND_BY_SRC: | |
73be902c | 4681 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; |
d46c5b12 KH |
4682 | break; |
4683 | case CCL_STAT_SUSPEND_BY_DST: | |
73be902c | 4684 | coding->result = CODING_FINISH_INSUFFICIENT_DST; |
d46c5b12 | 4685 | break; |
9864ebce KH |
4686 | case CCL_STAT_QUIT: |
4687 | case CCL_STAT_INVALID_CMD: | |
73be902c | 4688 | coding->result = CODING_FINISH_INTERRUPT; |
9864ebce | 4689 | break; |
d46c5b12 | 4690 | default: |
73be902c | 4691 | coding->result = CODING_FINISH_NORMAL; |
d46c5b12 KH |
4692 | break; |
4693 | } | |
73be902c | 4694 | return coding->result; |
4ed46869 KH |
4695 | } |
4696 | ||
aaaf0b1e KH |
4697 | /* Decode EOL format of the text at PTR of BYTES length destructively |
4698 | according to CODING->eol_type. This is called after the CCL | |
4699 | program produced a decoded text at PTR. If we do CRLF->LF | |
4700 | conversion, update CODING->produced and CODING->produced_char. */ | |
4701 | ||
4702 | static void | |
4703 | decode_eol_post_ccl (coding, ptr, bytes) | |
4704 | struct coding_system *coding; | |
4705 | unsigned char *ptr; | |
4706 | int bytes; | |
4707 | { | |
4708 | Lisp_Object val, saved_coding_symbol; | |
4709 | unsigned char *pend = ptr + bytes; | |
4710 | int dummy; | |
4711 | ||
4712 | /* Remember the current coding system symbol. We set it back when | |
4713 | an inconsistent EOL is found so that `last-coding-system-used' is | |
4714 | set to the coding system that doesn't specify EOL conversion. */ | |
4715 | saved_coding_symbol = coding->symbol; | |
4716 | ||
4717 | coding->spec.ccl.cr_carryover = 0; | |
4718 | if (coding->eol_type == CODING_EOL_UNDECIDED) | |
4719 | { | |
4720 | /* Here, to avoid the call of setup_coding_system, we directly | |
4721 | call detect_eol_type. */ | |
4722 | coding->eol_type = detect_eol_type (ptr, bytes, &dummy); | |
74b01b80 EZ |
4723 | if (coding->eol_type == CODING_EOL_INCONSISTENT) |
4724 | coding->eol_type = CODING_EOL_LF; | |
4725 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
4726 | { | |
4727 | val = Fget (coding->symbol, Qeol_type); | |
4728 | if (VECTORP (val) && XVECTOR (val)->size == 3) | |
4729 | coding->symbol = XVECTOR (val)->contents[coding->eol_type]; | |
4730 | } | |
aaaf0b1e KH |
4731 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
4732 | } | |
4733 | ||
74b01b80 EZ |
4734 | if (coding->eol_type == CODING_EOL_LF |
4735 | || coding->eol_type == CODING_EOL_UNDECIDED) | |
aaaf0b1e KH |
4736 | { |
4737 | /* We have nothing to do. */ | |
4738 | ptr = pend; | |
4739 | } | |
4740 | else if (coding->eol_type == CODING_EOL_CRLF) | |
4741 | { | |
4742 | unsigned char *pstart = ptr, *p = ptr; | |
4743 | ||
4744 | if (! (coding->mode & CODING_MODE_LAST_BLOCK) | |
4745 | && *(pend - 1) == '\r') | |
4746 | { | |
4747 | /* If the last character is CR, we can't handle it here | |
4748 | because LF will be in the not-yet-decoded source text. | |
9861e777 | 4749 | Record that the CR is not yet processed. */ |
aaaf0b1e KH |
4750 | coding->spec.ccl.cr_carryover = 1; |
4751 | coding->produced--; | |
4752 | coding->produced_char--; | |
4753 | pend--; | |
4754 | } | |
4755 | while (ptr < pend) | |
4756 | { | |
4757 | if (*ptr == '\r') | |
4758 | { | |
4759 | if (ptr + 1 < pend && *(ptr + 1) == '\n') | |
4760 | { | |
4761 | *p++ = '\n'; | |
4762 | ptr += 2; | |
4763 | } | |
4764 | else | |
4765 | { | |
4766 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4767 | goto undo_eol_conversion; | |
4768 | *p++ = *ptr++; | |
4769 | } | |
4770 | } | |
4771 | else if (*ptr == '\n' | |
4772 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4773 | goto undo_eol_conversion; | |
4774 | else | |
4775 | *p++ = *ptr++; | |
4776 | continue; | |
4777 | ||
4778 | undo_eol_conversion: | |
4779 | /* We have faced with inconsistent EOL format at PTR. | |
4780 | Convert all LFs before PTR back to CRLFs. */ | |
4781 | for (p--, ptr--; p >= pstart; p--) | |
4782 | { | |
4783 | if (*p == '\n') | |
4784 | *ptr-- = '\n', *ptr-- = '\r'; | |
4785 | else | |
4786 | *ptr-- = *p; | |
4787 | } | |
4788 | /* If carryover is recorded, cancel it because we don't | |
4789 | convert CRLF anymore. */ | |
4790 | if (coding->spec.ccl.cr_carryover) | |
4791 | { | |
4792 | coding->spec.ccl.cr_carryover = 0; | |
4793 | coding->produced++; | |
4794 | coding->produced_char++; | |
4795 | pend++; | |
4796 | } | |
4797 | p = ptr = pend; | |
4798 | coding->eol_type = CODING_EOL_LF; | |
4799 | coding->symbol = saved_coding_symbol; | |
4800 | } | |
4801 | if (p < pend) | |
4802 | { | |
4803 | /* As each two-byte sequence CRLF was converted to LF, (PEND | |
4804 | - P) is the number of deleted characters. */ | |
4805 | coding->produced -= pend - p; | |
4806 | coding->produced_char -= pend - p; | |
4807 | } | |
4808 | } | |
4809 | else /* i.e. coding->eol_type == CODING_EOL_CR */ | |
4810 | { | |
4811 | unsigned char *p = ptr; | |
4812 | ||
4813 | for (; ptr < pend; ptr++) | |
4814 | { | |
4815 | if (*ptr == '\r') | |
4816 | *ptr = '\n'; | |
4817 | else if (*ptr == '\n' | |
4818 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4819 | { | |
4820 | for (; p < ptr; p++) | |
4821 | { | |
4822 | if (*p == '\n') | |
4823 | *p = '\r'; | |
4824 | } | |
4825 | ptr = pend; | |
4826 | coding->eol_type = CODING_EOL_LF; | |
4827 | coding->symbol = saved_coding_symbol; | |
4828 | } | |
4829 | } | |
4830 | } | |
4831 | } | |
4832 | ||
4ed46869 KH |
4833 | /* See "GENERAL NOTES about `decode_coding_XXX ()' functions". Before |
4834 | decoding, it may detect coding system and format of end-of-line if | |
b73bfc1c KH |
4835 | those are not yet decided. The source should be unibyte, the |
4836 | result is multibyte if CODING->dst_multibyte is nonzero, else | |
4837 | unibyte. */ | |
4ed46869 KH |
4838 | |
4839 | int | |
d46c5b12 | 4840 | decode_coding (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 4841 | struct coding_system *coding; |
a4244313 KR |
4842 | const unsigned char *source; |
4843 | unsigned char *destination; | |
4ed46869 | 4844 | int src_bytes, dst_bytes; |
4ed46869 | 4845 | { |
9861e777 EZ |
4846 | int extra = 0; |
4847 | ||
0ef69138 | 4848 | if (coding->type == coding_type_undecided) |
4ed46869 KH |
4849 | detect_coding (coding, source, src_bytes); |
4850 | ||
aaaf0b1e KH |
4851 | if (coding->eol_type == CODING_EOL_UNDECIDED |
4852 | && coding->type != coding_type_ccl) | |
8844fa83 KH |
4853 | { |
4854 | detect_eol (coding, source, src_bytes); | |
4855 | /* We had better recover the original eol format if we | |
8ca3766a | 4856 | encounter an inconsistent eol format while decoding. */ |
8844fa83 KH |
4857 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
4858 | } | |
4ed46869 | 4859 | |
b73bfc1c KH |
4860 | coding->produced = coding->produced_char = 0; |
4861 | coding->consumed = coding->consumed_char = 0; | |
4862 | coding->errors = 0; | |
4863 | coding->result = CODING_FINISH_NORMAL; | |
4864 | ||
4ed46869 KH |
4865 | switch (coding->type) |
4866 | { | |
4ed46869 | 4867 | case coding_type_sjis: |
b73bfc1c KH |
4868 | decode_coding_sjis_big5 (coding, source, destination, |
4869 | src_bytes, dst_bytes, 1); | |
4ed46869 KH |
4870 | break; |
4871 | ||
4872 | case coding_type_iso2022: | |
b73bfc1c KH |
4873 | decode_coding_iso2022 (coding, source, destination, |
4874 | src_bytes, dst_bytes); | |
4ed46869 KH |
4875 | break; |
4876 | ||
4877 | case coding_type_big5: | |
b73bfc1c KH |
4878 | decode_coding_sjis_big5 (coding, source, destination, |
4879 | src_bytes, dst_bytes, 0); | |
4880 | break; | |
4881 | ||
4882 | case coding_type_emacs_mule: | |
4883 | decode_coding_emacs_mule (coding, source, destination, | |
4884 | src_bytes, dst_bytes); | |
4ed46869 KH |
4885 | break; |
4886 | ||
4887 | case coding_type_ccl: | |
aaaf0b1e KH |
4888 | if (coding->spec.ccl.cr_carryover) |
4889 | { | |
9861e777 EZ |
4890 | /* Put the CR which was not processed by the previous call |
4891 | of decode_eol_post_ccl in DESTINATION. It will be | |
4892 | decoded together with the following LF by the call to | |
4893 | decode_eol_post_ccl below. */ | |
aaaf0b1e KH |
4894 | *destination = '\r'; |
4895 | coding->produced++; | |
4896 | coding->produced_char++; | |
4897 | dst_bytes--; | |
9861e777 | 4898 | extra = coding->spec.ccl.cr_carryover; |
aaaf0b1e | 4899 | } |
9861e777 | 4900 | ccl_coding_driver (coding, source, destination + extra, |
b73bfc1c | 4901 | src_bytes, dst_bytes, 0); |
aaaf0b1e | 4902 | if (coding->eol_type != CODING_EOL_LF) |
9861e777 EZ |
4903 | { |
4904 | coding->produced += extra; | |
4905 | coding->produced_char += extra; | |
4906 | decode_eol_post_ccl (coding, destination, coding->produced); | |
4907 | } | |
d46c5b12 KH |
4908 | break; |
4909 | ||
b73bfc1c KH |
4910 | default: |
4911 | decode_eol (coding, source, destination, src_bytes, dst_bytes); | |
4912 | } | |
4913 | ||
4914 | if (coding->result == CODING_FINISH_INSUFFICIENT_SRC | |
e7c9eef9 | 4915 | && coding->mode & CODING_MODE_LAST_BLOCK |
b73bfc1c KH |
4916 | && coding->consumed == src_bytes) |
4917 | coding->result = CODING_FINISH_NORMAL; | |
4918 | ||
4919 | if (coding->mode & CODING_MODE_LAST_BLOCK | |
4920 | && coding->result == CODING_FINISH_INSUFFICIENT_SRC) | |
4921 | { | |
a4244313 | 4922 | const unsigned char *src = source + coding->consumed; |
b73bfc1c KH |
4923 | unsigned char *dst = destination + coding->produced; |
4924 | ||
4925 | src_bytes -= coding->consumed; | |
bb10be8b | 4926 | coding->errors++; |
b73bfc1c KH |
4927 | if (COMPOSING_P (coding)) |
4928 | DECODE_COMPOSITION_END ('1'); | |
4929 | while (src_bytes--) | |
d46c5b12 | 4930 | { |
b73bfc1c KH |
4931 | int c = *src++; |
4932 | dst += CHAR_STRING (c, dst); | |
4933 | coding->produced_char++; | |
d46c5b12 | 4934 | } |
b73bfc1c KH |
4935 | coding->consumed = coding->consumed_char = src - source; |
4936 | coding->produced = dst - destination; | |
73be902c | 4937 | coding->result = CODING_FINISH_NORMAL; |
4ed46869 KH |
4938 | } |
4939 | ||
b73bfc1c KH |
4940 | if (!coding->dst_multibyte) |
4941 | { | |
4942 | coding->produced = str_as_unibyte (destination, coding->produced); | |
4943 | coding->produced_char = coding->produced; | |
4944 | } | |
4ed46869 | 4945 | |
b73bfc1c KH |
4946 | return coding->result; |
4947 | } | |
52d41803 | 4948 | |
b73bfc1c KH |
4949 | /* See "GENERAL NOTES about `encode_coding_XXX ()' functions". The |
4950 | multibyteness of the source is CODING->src_multibyte, the | |
4951 | multibyteness of the result is always unibyte. */ | |
4ed46869 KH |
4952 | |
4953 | int | |
d46c5b12 | 4954 | encode_coding (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 4955 | struct coding_system *coding; |
a4244313 KR |
4956 | const unsigned char *source; |
4957 | unsigned char *destination; | |
4ed46869 | 4958 | int src_bytes, dst_bytes; |
4ed46869 | 4959 | { |
b73bfc1c KH |
4960 | coding->produced = coding->produced_char = 0; |
4961 | coding->consumed = coding->consumed_char = 0; | |
4962 | coding->errors = 0; | |
4963 | coding->result = CODING_FINISH_NORMAL; | |
4ed46869 | 4964 | |
d46c5b12 KH |
4965 | switch (coding->type) |
4966 | { | |
4ed46869 | 4967 | case coding_type_sjis: |
b73bfc1c KH |
4968 | encode_coding_sjis_big5 (coding, source, destination, |
4969 | src_bytes, dst_bytes, 1); | |
4ed46869 KH |
4970 | break; |
4971 | ||
4972 | case coding_type_iso2022: | |
b73bfc1c KH |
4973 | encode_coding_iso2022 (coding, source, destination, |
4974 | src_bytes, dst_bytes); | |
4ed46869 KH |
4975 | break; |
4976 | ||
4977 | case coding_type_big5: | |
b73bfc1c KH |
4978 | encode_coding_sjis_big5 (coding, source, destination, |
4979 | src_bytes, dst_bytes, 0); | |
4980 | break; | |
4981 | ||
4982 | case coding_type_emacs_mule: | |
4983 | encode_coding_emacs_mule (coding, source, destination, | |
4984 | src_bytes, dst_bytes); | |
4ed46869 KH |
4985 | break; |
4986 | ||
4987 | case coding_type_ccl: | |
b73bfc1c KH |
4988 | ccl_coding_driver (coding, source, destination, |
4989 | src_bytes, dst_bytes, 1); | |
d46c5b12 KH |
4990 | break; |
4991 | ||
b73bfc1c KH |
4992 | default: |
4993 | encode_eol (coding, source, destination, src_bytes, dst_bytes); | |
4994 | } | |
4995 | ||
73be902c KH |
4996 | if (coding->mode & CODING_MODE_LAST_BLOCK |
4997 | && coding->result == CODING_FINISH_INSUFFICIENT_SRC) | |
b73bfc1c | 4998 | { |
a4244313 | 4999 | const unsigned char *src = source + coding->consumed; |
b73bfc1c KH |
5000 | unsigned char *dst = destination + coding->produced; |
5001 | ||
5002 | if (coding->type == coding_type_iso2022) | |
5003 | ENCODE_RESET_PLANE_AND_REGISTER; | |
5004 | if (COMPOSING_P (coding)) | |
5005 | *dst++ = ISO_CODE_ESC, *dst++ = '1'; | |
5006 | if (coding->consumed < src_bytes) | |
d46c5b12 | 5007 | { |
b73bfc1c KH |
5008 | int len = src_bytes - coding->consumed; |
5009 | ||
fabf4a91 | 5010 | BCOPY_SHORT (src, dst, len); |
b73bfc1c KH |
5011 | if (coding->src_multibyte) |
5012 | len = str_as_unibyte (dst, len); | |
5013 | dst += len; | |
5014 | coding->consumed = src_bytes; | |
d46c5b12 | 5015 | } |
b73bfc1c | 5016 | coding->produced = coding->produced_char = dst - destination; |
73be902c | 5017 | coding->result = CODING_FINISH_NORMAL; |
4ed46869 KH |
5018 | } |
5019 | ||
bb10be8b KH |
5020 | if (coding->result == CODING_FINISH_INSUFFICIENT_SRC |
5021 | && coding->consumed == src_bytes) | |
5022 | coding->result = CODING_FINISH_NORMAL; | |
5023 | ||
b73bfc1c | 5024 | return coding->result; |
4ed46869 KH |
5025 | } |
5026 | ||
fb88bf2d KH |
5027 | /* Scan text in the region between *BEG and *END (byte positions), |
5028 | skip characters which we don't have to decode by coding system | |
5029 | CODING at the head and tail, then set *BEG and *END to the region | |
5030 | of the text we actually have to convert. The caller should move | |
b73bfc1c KH |
5031 | the gap out of the region in advance if the region is from a |
5032 | buffer. | |
4ed46869 | 5033 | |
d46c5b12 KH |
5034 | If STR is not NULL, *BEG and *END are indices into STR. */ |
5035 | ||
5036 | static void | |
5037 | shrink_decoding_region (beg, end, coding, str) | |
5038 | int *beg, *end; | |
5039 | struct coding_system *coding; | |
5040 | unsigned char *str; | |
5041 | { | |
fb88bf2d | 5042 | unsigned char *begp_orig, *begp, *endp_orig, *endp, c; |
d46c5b12 | 5043 | int eol_conversion; |
88993dfd | 5044 | Lisp_Object translation_table; |
d46c5b12 KH |
5045 | |
5046 | if (coding->type == coding_type_ccl | |
5047 | || coding->type == coding_type_undecided | |
b73bfc1c KH |
5048 | || coding->eol_type != CODING_EOL_LF |
5049 | || !NILP (coding->post_read_conversion) | |
5050 | || coding->composing != COMPOSITION_DISABLED) | |
d46c5b12 KH |
5051 | { |
5052 | /* We can't skip any data. */ | |
5053 | return; | |
5054 | } | |
b73bfc1c KH |
5055 | if (coding->type == coding_type_no_conversion |
5056 | || coding->type == coding_type_raw_text | |
5057 | || coding->type == coding_type_emacs_mule) | |
d46c5b12 | 5058 | { |
fb88bf2d KH |
5059 | /* We need no conversion, but don't have to skip any data here. |
5060 | Decoding routine handles them effectively anyway. */ | |
d46c5b12 KH |
5061 | return; |
5062 | } | |
5063 | ||
88993dfd KH |
5064 | translation_table = coding->translation_table_for_decode; |
5065 | if (NILP (translation_table) && !NILP (Venable_character_translation)) | |
5066 | translation_table = Vstandard_translation_table_for_decode; | |
5067 | if (CHAR_TABLE_P (translation_table)) | |
5068 | { | |
5069 | int i; | |
5070 | for (i = 0; i < 128; i++) | |
5071 | if (!NILP (CHAR_TABLE_REF (translation_table, i))) | |
5072 | break; | |
5073 | if (i < 128) | |
fa46990e | 5074 | /* Some ASCII character should be translated. We give up |
88993dfd KH |
5075 | shrinking. */ |
5076 | return; | |
5077 | } | |
5078 | ||
b73bfc1c | 5079 | if (coding->heading_ascii >= 0) |
d46c5b12 KH |
5080 | /* Detection routine has already found how much we can skip at the |
5081 | head. */ | |
5082 | *beg += coding->heading_ascii; | |
5083 | ||
5084 | if (str) | |
5085 | { | |
5086 | begp_orig = begp = str + *beg; | |
5087 | endp_orig = endp = str + *end; | |
5088 | } | |
5089 | else | |
5090 | { | |
fb88bf2d | 5091 | begp_orig = begp = BYTE_POS_ADDR (*beg); |
d46c5b12 KH |
5092 | endp_orig = endp = begp + *end - *beg; |
5093 | } | |
5094 | ||
fa46990e DL |
5095 | eol_conversion = (coding->eol_type == CODING_EOL_CR |
5096 | || coding->eol_type == CODING_EOL_CRLF); | |
5097 | ||
d46c5b12 KH |
5098 | switch (coding->type) |
5099 | { | |
d46c5b12 KH |
5100 | case coding_type_sjis: |
5101 | case coding_type_big5: | |
5102 | /* We can skip all ASCII characters at the head. */ | |
5103 | if (coding->heading_ascii < 0) | |
5104 | { | |
5105 | if (eol_conversion) | |
de9d083c | 5106 | while (begp < endp && *begp < 0x80 && *begp != '\r') begp++; |
d46c5b12 KH |
5107 | else |
5108 | while (begp < endp && *begp < 0x80) begp++; | |
5109 | } | |
5110 | /* We can skip all ASCII characters at the tail except for the | |
5111 | second byte of SJIS or BIG5 code. */ | |
5112 | if (eol_conversion) | |
de9d083c | 5113 | while (begp < endp && endp[-1] < 0x80 && endp[-1] != '\r') endp--; |
d46c5b12 KH |
5114 | else |
5115 | while (begp < endp && endp[-1] < 0x80) endp--; | |
ee59c65f RS |
5116 | /* Do not consider LF as ascii if preceded by CR, since that |
5117 | confuses eol decoding. */ | |
5118 | if (begp < endp && endp < endp_orig && endp[-1] == '\r' && endp[0] == '\n') | |
5119 | endp++; | |
d46c5b12 KH |
5120 | if (begp < endp && endp < endp_orig && endp[-1] >= 0x80) |
5121 | endp++; | |
5122 | break; | |
5123 | ||
b73bfc1c | 5124 | case coding_type_iso2022: |
622fece5 KH |
5125 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, 0) != CHARSET_ASCII) |
5126 | /* We can't skip any data. */ | |
5127 | break; | |
d46c5b12 KH |
5128 | if (coding->heading_ascii < 0) |
5129 | { | |
d46c5b12 KH |
5130 | /* We can skip all ASCII characters at the head except for a |
5131 | few control codes. */ | |
5132 | while (begp < endp && (c = *begp) < 0x80 | |
5133 | && c != ISO_CODE_CR && c != ISO_CODE_SO | |
5134 | && c != ISO_CODE_SI && c != ISO_CODE_ESC | |
5135 | && (!eol_conversion || c != ISO_CODE_LF)) | |
5136 | begp++; | |
5137 | } | |
5138 | switch (coding->category_idx) | |
5139 | { | |
5140 | case CODING_CATEGORY_IDX_ISO_8_1: | |
5141 | case CODING_CATEGORY_IDX_ISO_8_2: | |
5142 | /* We can skip all ASCII characters at the tail. */ | |
5143 | if (eol_conversion) | |
de9d083c | 5144 | while (begp < endp && (c = endp[-1]) < 0x80 && c != '\r') endp--; |
d46c5b12 KH |
5145 | else |
5146 | while (begp < endp && endp[-1] < 0x80) endp--; | |
ee59c65f RS |
5147 | /* Do not consider LF as ascii if preceded by CR, since that |
5148 | confuses eol decoding. */ | |
5149 | if (begp < endp && endp < endp_orig && endp[-1] == '\r' && endp[0] == '\n') | |
5150 | endp++; | |
d46c5b12 KH |
5151 | break; |
5152 | ||
5153 | case CODING_CATEGORY_IDX_ISO_7: | |
5154 | case CODING_CATEGORY_IDX_ISO_7_TIGHT: | |
de79a6a5 | 5155 | { |
8ca3766a | 5156 | /* We can skip all characters at the tail except for 8-bit |
de79a6a5 KH |
5157 | codes and ESC and the following 2-byte at the tail. */ |
5158 | unsigned char *eight_bit = NULL; | |
5159 | ||
5160 | if (eol_conversion) | |
5161 | while (begp < endp | |
5162 | && (c = endp[-1]) != ISO_CODE_ESC && c != '\r') | |
5163 | { | |
5164 | if (!eight_bit && c & 0x80) eight_bit = endp; | |
5165 | endp--; | |
5166 | } | |
5167 | else | |
5168 | while (begp < endp | |
5169 | && (c = endp[-1]) != ISO_CODE_ESC) | |
5170 | { | |
5171 | if (!eight_bit && c & 0x80) eight_bit = endp; | |
5172 | endp--; | |
5173 | } | |
5174 | /* Do not consider LF as ascii if preceded by CR, since that | |
5175 | confuses eol decoding. */ | |
5176 | if (begp < endp && endp < endp_orig | |
5177 | && endp[-1] == '\r' && endp[0] == '\n') | |
5178 | endp++; | |
5179 | if (begp < endp && endp[-1] == ISO_CODE_ESC) | |
5180 | { | |
5181 | if (endp + 1 < endp_orig && end[0] == '(' && end[1] == 'B') | |
5182 | /* This is an ASCII designation sequence. We can | |
5183 | surely skip the tail. But, if we have | |
5184 | encountered an 8-bit code, skip only the codes | |
5185 | after that. */ | |
5186 | endp = eight_bit ? eight_bit : endp + 2; | |
5187 | else | |
5188 | /* Hmmm, we can't skip the tail. */ | |
5189 | endp = endp_orig; | |
5190 | } | |
5191 | else if (eight_bit) | |
5192 | endp = eight_bit; | |
5193 | } | |
d46c5b12 | 5194 | } |
b73bfc1c KH |
5195 | break; |
5196 | ||
5197 | default: | |
5198 | abort (); | |
d46c5b12 KH |
5199 | } |
5200 | *beg += begp - begp_orig; | |
5201 | *end += endp - endp_orig; | |
5202 | return; | |
5203 | } | |
5204 | ||
5205 | /* Like shrink_decoding_region but for encoding. */ | |
5206 | ||
5207 | static void | |
5208 | shrink_encoding_region (beg, end, coding, str) | |
5209 | int *beg, *end; | |
5210 | struct coding_system *coding; | |
5211 | unsigned char *str; | |
5212 | { | |
5213 | unsigned char *begp_orig, *begp, *endp_orig, *endp; | |
5214 | int eol_conversion; | |
88993dfd | 5215 | Lisp_Object translation_table; |
d46c5b12 | 5216 | |
b73bfc1c KH |
5217 | if (coding->type == coding_type_ccl |
5218 | || coding->eol_type == CODING_EOL_CRLF | |
5219 | || coding->eol_type == CODING_EOL_CR | |
87323294 | 5220 | || (coding->cmp_data && coding->cmp_data->used > 0)) |
d46c5b12 | 5221 | { |
b73bfc1c KH |
5222 | /* We can't skip any data. */ |
5223 | return; | |
5224 | } | |
5225 | if (coding->type == coding_type_no_conversion | |
5226 | || coding->type == coding_type_raw_text | |
5227 | || coding->type == coding_type_emacs_mule | |
5228 | || coding->type == coding_type_undecided) | |
5229 | { | |
5230 | /* We need no conversion, but don't have to skip any data here. | |
5231 | Encoding routine handles them effectively anyway. */ | |
d46c5b12 KH |
5232 | return; |
5233 | } | |
5234 | ||
88993dfd KH |
5235 | translation_table = coding->translation_table_for_encode; |
5236 | if (NILP (translation_table) && !NILP (Venable_character_translation)) | |
5237 | translation_table = Vstandard_translation_table_for_encode; | |
5238 | if (CHAR_TABLE_P (translation_table)) | |
5239 | { | |
5240 | int i; | |
5241 | for (i = 0; i < 128; i++) | |
5242 | if (!NILP (CHAR_TABLE_REF (translation_table, i))) | |
5243 | break; | |
5244 | if (i < 128) | |
8ca3766a | 5245 | /* Some ASCII character should be translated. We give up |
88993dfd KH |
5246 | shrinking. */ |
5247 | return; | |
5248 | } | |
5249 | ||
d46c5b12 KH |
5250 | if (str) |
5251 | { | |
5252 | begp_orig = begp = str + *beg; | |
5253 | endp_orig = endp = str + *end; | |
5254 | } | |
5255 | else | |
5256 | { | |
fb88bf2d | 5257 | begp_orig = begp = BYTE_POS_ADDR (*beg); |
d46c5b12 KH |
5258 | endp_orig = endp = begp + *end - *beg; |
5259 | } | |
5260 | ||
5261 | eol_conversion = (coding->eol_type == CODING_EOL_CR | |
5262 | || coding->eol_type == CODING_EOL_CRLF); | |
5263 | ||
5264 | /* Here, we don't have to check coding->pre_write_conversion because | |
5265 | the caller is expected to have handled it already. */ | |
5266 | switch (coding->type) | |
5267 | { | |
d46c5b12 | 5268 | case coding_type_iso2022: |
622fece5 KH |
5269 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, 0) != CHARSET_ASCII) |
5270 | /* We can't skip any data. */ | |
5271 | break; | |
d46c5b12 KH |
5272 | if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL) |
5273 | { | |
93dec019 | 5274 | unsigned char *bol = begp; |
d46c5b12 KH |
5275 | while (begp < endp && *begp < 0x80) |
5276 | { | |
5277 | begp++; | |
5278 | if (begp[-1] == '\n') | |
5279 | bol = begp; | |
5280 | } | |
5281 | begp = bol; | |
5282 | goto label_skip_tail; | |
5283 | } | |
5284 | /* fall down ... */ | |
5285 | ||
b73bfc1c KH |
5286 | case coding_type_sjis: |
5287 | case coding_type_big5: | |
d46c5b12 KH |
5288 | /* We can skip all ASCII characters at the head and tail. */ |
5289 | if (eol_conversion) | |
5290 | while (begp < endp && *begp < 0x80 && *begp != '\n') begp++; | |
5291 | else | |
5292 | while (begp < endp && *begp < 0x80) begp++; | |
5293 | label_skip_tail: | |
5294 | if (eol_conversion) | |
5295 | while (begp < endp && endp[-1] < 0x80 && endp[-1] != '\n') endp--; | |
5296 | else | |
5297 | while (begp < endp && *(endp - 1) < 0x80) endp--; | |
5298 | break; | |
b73bfc1c KH |
5299 | |
5300 | default: | |
5301 | abort (); | |
d46c5b12 KH |
5302 | } |
5303 | ||
5304 | *beg += begp - begp_orig; | |
5305 | *end += endp - endp_orig; | |
5306 | return; | |
5307 | } | |
5308 | ||
88993dfd KH |
5309 | /* As shrinking conversion region requires some overhead, we don't try |
5310 | shrinking if the length of conversion region is less than this | |
5311 | value. */ | |
5312 | static int shrink_conversion_region_threshhold = 1024; | |
5313 | ||
5314 | #define SHRINK_CONVERSION_REGION(beg, end, coding, str, encodep) \ | |
5315 | do { \ | |
5316 | if (*(end) - *(beg) > shrink_conversion_region_threshhold) \ | |
5317 | { \ | |
5318 | if (encodep) shrink_encoding_region (beg, end, coding, str); \ | |
5319 | else shrink_decoding_region (beg, end, coding, str); \ | |
5320 | } \ | |
5321 | } while (0) | |
5322 | ||
b843d1ae | 5323 | static Lisp_Object |
1c7457e2 KH |
5324 | code_convert_region_unwind (arg) |
5325 | Lisp_Object arg; | |
b843d1ae KH |
5326 | { |
5327 | inhibit_pre_post_conversion = 0; | |
1c7457e2 | 5328 | Vlast_coding_system_used = arg; |
b843d1ae KH |
5329 | return Qnil; |
5330 | } | |
5331 | ||
ec6d2bb8 KH |
5332 | /* Store information about all compositions in the range FROM and TO |
5333 | of OBJ in memory blocks pointed by CODING->cmp_data. OBJ is a | |
5334 | buffer or a string, defaults to the current buffer. */ | |
5335 | ||
5336 | void | |
5337 | coding_save_composition (coding, from, to, obj) | |
5338 | struct coding_system *coding; | |
5339 | int from, to; | |
5340 | Lisp_Object obj; | |
5341 | { | |
5342 | Lisp_Object prop; | |
5343 | int start, end; | |
5344 | ||
91bee881 KH |
5345 | if (coding->composing == COMPOSITION_DISABLED) |
5346 | return; | |
5347 | if (!coding->cmp_data) | |
5348 | coding_allocate_composition_data (coding, from); | |
ec6d2bb8 KH |
5349 | if (!find_composition (from, to, &start, &end, &prop, obj) |
5350 | || end > to) | |
5351 | return; | |
5352 | if (start < from | |
5353 | && (!find_composition (end, to, &start, &end, &prop, obj) | |
5354 | || end > to)) | |
5355 | return; | |
5356 | coding->composing = COMPOSITION_NO; | |
ec6d2bb8 KH |
5357 | do |
5358 | { | |
5359 | if (COMPOSITION_VALID_P (start, end, prop)) | |
5360 | { | |
5361 | enum composition_method method = COMPOSITION_METHOD (prop); | |
5362 | if (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH | |
5363 | >= COMPOSITION_DATA_SIZE) | |
5364 | coding_allocate_composition_data (coding, from); | |
5365 | /* For relative composition, we remember start and end | |
5366 | positions, for the other compositions, we also remember | |
5367 | components. */ | |
5368 | CODING_ADD_COMPOSITION_START (coding, start - from, method); | |
5369 | if (method != COMPOSITION_RELATIVE) | |
5370 | { | |
5371 | /* We must store a*/ | |
5372 | Lisp_Object val, ch; | |
5373 | ||
5374 | val = COMPOSITION_COMPONENTS (prop); | |
5375 | if (CONSP (val)) | |
5376 | while (CONSP (val)) | |
5377 | { | |
5378 | ch = XCAR (val), val = XCDR (val); | |
5379 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (ch)); | |
5380 | } | |
5381 | else if (VECTORP (val) || STRINGP (val)) | |
5382 | { | |
5383 | int len = (VECTORP (val) | |
d5db4077 | 5384 | ? XVECTOR (val)->size : SCHARS (val)); |
ec6d2bb8 KH |
5385 | int i; |
5386 | for (i = 0; i < len; i++) | |
5387 | { | |
5388 | ch = (STRINGP (val) | |
5389 | ? Faref (val, make_number (i)) | |
5390 | : XVECTOR (val)->contents[i]); | |
5391 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (ch)); | |
5392 | } | |
5393 | } | |
5394 | else /* INTEGERP (val) */ | |
5395 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (val)); | |
5396 | } | |
5397 | CODING_ADD_COMPOSITION_END (coding, end - from); | |
5398 | } | |
5399 | start = end; | |
5400 | } | |
5401 | while (start < to | |
5402 | && find_composition (start, to, &start, &end, &prop, obj) | |
5403 | && end <= to); | |
5404 | ||
5405 | /* Make coding->cmp_data point to the first memory block. */ | |
5406 | while (coding->cmp_data->prev) | |
5407 | coding->cmp_data = coding->cmp_data->prev; | |
5408 | coding->cmp_data_start = 0; | |
5409 | } | |
5410 | ||
5411 | /* Reflect the saved information about compositions to OBJ. | |
8ca3766a | 5412 | CODING->cmp_data points to a memory block for the information. OBJ |
ec6d2bb8 KH |
5413 | is a buffer or a string, defaults to the current buffer. */ |
5414 | ||
33fb63eb | 5415 | void |
ec6d2bb8 KH |
5416 | coding_restore_composition (coding, obj) |
5417 | struct coding_system *coding; | |
5418 | Lisp_Object obj; | |
5419 | { | |
5420 | struct composition_data *cmp_data = coding->cmp_data; | |
5421 | ||
5422 | if (!cmp_data) | |
5423 | return; | |
5424 | ||
5425 | while (cmp_data->prev) | |
5426 | cmp_data = cmp_data->prev; | |
5427 | ||
5428 | while (cmp_data) | |
5429 | { | |
5430 | int i; | |
5431 | ||
78108bcd KH |
5432 | for (i = 0; i < cmp_data->used && cmp_data->data[i] > 0; |
5433 | i += cmp_data->data[i]) | |
ec6d2bb8 KH |
5434 | { |
5435 | int *data = cmp_data->data + i; | |
5436 | enum composition_method method = (enum composition_method) data[3]; | |
5437 | Lisp_Object components; | |
5438 | ||
5439 | if (method == COMPOSITION_RELATIVE) | |
5440 | components = Qnil; | |
5441 | else | |
5442 | { | |
5443 | int len = data[0] - 4, j; | |
5444 | Lisp_Object args[MAX_COMPOSITION_COMPONENTS * 2 - 1]; | |
5445 | ||
b6871cc7 KH |
5446 | if (method == COMPOSITION_WITH_RULE_ALTCHARS |
5447 | && len % 2 == 0) | |
5448 | len --; | |
ec6d2bb8 KH |
5449 | for (j = 0; j < len; j++) |
5450 | args[j] = make_number (data[4 + j]); | |
5451 | components = (method == COMPOSITION_WITH_ALTCHARS | |
5452 | ? Fstring (len, args) : Fvector (len, args)); | |
5453 | } | |
5454 | compose_text (data[1], data[2], components, Qnil, obj); | |
5455 | } | |
5456 | cmp_data = cmp_data->next; | |
5457 | } | |
5458 | } | |
5459 | ||
d46c5b12 | 5460 | /* Decode (if ENCODEP is zero) or encode (if ENCODEP is nonzero) the |
fb88bf2d KH |
5461 | text from FROM to TO (byte positions are FROM_BYTE and TO_BYTE) by |
5462 | coding system CODING, and return the status code of code conversion | |
5463 | (currently, this value has no meaning). | |
5464 | ||
5465 | How many characters (and bytes) are converted to how many | |
5466 | characters (and bytes) are recorded in members of the structure | |
5467 | CODING. | |
d46c5b12 | 5468 | |
6e44253b | 5469 | If REPLACE is nonzero, we do various things as if the original text |
d46c5b12 | 5470 | is deleted and a new text is inserted. See the comments in |
b73bfc1c KH |
5471 | replace_range (insdel.c) to know what we are doing. |
5472 | ||
5473 | If REPLACE is zero, it is assumed that the source text is unibyte. | |
8ca3766a | 5474 | Otherwise, it is assumed that the source text is multibyte. */ |
4ed46869 KH |
5475 | |
5476 | int | |
6e44253b KH |
5477 | code_convert_region (from, from_byte, to, to_byte, coding, encodep, replace) |
5478 | int from, from_byte, to, to_byte, encodep, replace; | |
4ed46869 | 5479 | struct coding_system *coding; |
4ed46869 | 5480 | { |
fb88bf2d | 5481 | int len = to - from, len_byte = to_byte - from_byte; |
72d1a715 | 5482 | int nchars_del = 0, nbytes_del = 0; |
fb88bf2d | 5483 | int require, inserted, inserted_byte; |
4b39528c | 5484 | int head_skip, tail_skip, total_skip = 0; |
84d60297 | 5485 | Lisp_Object saved_coding_symbol; |
fb88bf2d | 5486 | int first = 1; |
fb88bf2d | 5487 | unsigned char *src, *dst; |
84d60297 | 5488 | Lisp_Object deletion; |
e133c8fa | 5489 | int orig_point = PT, orig_len = len; |
6abb9bd9 | 5490 | int prev_Z; |
b73bfc1c KH |
5491 | int multibyte_p = !NILP (current_buffer->enable_multibyte_characters); |
5492 | ||
84d60297 | 5493 | deletion = Qnil; |
8844fa83 | 5494 | saved_coding_symbol = coding->symbol; |
d46c5b12 | 5495 | |
83fa074f | 5496 | if (from < PT && PT < to) |
e133c8fa KH |
5497 | { |
5498 | TEMP_SET_PT_BOTH (from, from_byte); | |
5499 | orig_point = from; | |
5500 | } | |
83fa074f | 5501 | |
6e44253b | 5502 | if (replace) |
d46c5b12 | 5503 | { |
fb88bf2d | 5504 | int saved_from = from; |
e077cc80 | 5505 | int saved_inhibit_modification_hooks; |
fb88bf2d | 5506 | |
d46c5b12 | 5507 | prepare_to_modify_buffer (from, to, &from); |
fb88bf2d KH |
5508 | if (saved_from != from) |
5509 | { | |
5510 | to = from + len; | |
b73bfc1c | 5511 | from_byte = CHAR_TO_BYTE (from), to_byte = CHAR_TO_BYTE (to); |
fb88bf2d KH |
5512 | len_byte = to_byte - from_byte; |
5513 | } | |
e077cc80 KH |
5514 | |
5515 | /* The code conversion routine can not preserve text properties | |
5516 | for now. So, we must remove all text properties in the | |
5517 | region. Here, we must suppress all modification hooks. */ | |
5518 | saved_inhibit_modification_hooks = inhibit_modification_hooks; | |
5519 | inhibit_modification_hooks = 1; | |
5520 | Fset_text_properties (make_number (from), make_number (to), Qnil, Qnil); | |
5521 | inhibit_modification_hooks = saved_inhibit_modification_hooks; | |
d46c5b12 | 5522 | } |
d46c5b12 KH |
5523 | |
5524 | if (! encodep && CODING_REQUIRE_DETECTION (coding)) | |
5525 | { | |
12410ef1 | 5526 | /* We must detect encoding of text and eol format. */ |
d46c5b12 KH |
5527 | |
5528 | if (from < GPT && to > GPT) | |
5529 | move_gap_both (from, from_byte); | |
5530 | if (coding->type == coding_type_undecided) | |
5531 | { | |
fb88bf2d | 5532 | detect_coding (coding, BYTE_POS_ADDR (from_byte), len_byte); |
d46c5b12 | 5533 | if (coding->type == coding_type_undecided) |
62b3ef1d KH |
5534 | { |
5535 | /* It seems that the text contains only ASCII, but we | |
d9aef30f | 5536 | should not leave it undecided because the deeper |
62b3ef1d KH |
5537 | decoding routine (decode_coding) tries to detect the |
5538 | encodings again in vain. */ | |
5539 | coding->type = coding_type_emacs_mule; | |
5540 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
d280ccb6 KH |
5541 | /* As emacs-mule decoder will handle composition, we |
5542 | need this setting to allocate coding->cmp_data | |
5543 | later. */ | |
5544 | coding->composing = COMPOSITION_NO; | |
62b3ef1d | 5545 | } |
d46c5b12 | 5546 | } |
aaaf0b1e KH |
5547 | if (coding->eol_type == CODING_EOL_UNDECIDED |
5548 | && coding->type != coding_type_ccl) | |
d46c5b12 | 5549 | { |
d46c5b12 KH |
5550 | detect_eol (coding, BYTE_POS_ADDR (from_byte), len_byte); |
5551 | if (coding->eol_type == CODING_EOL_UNDECIDED) | |
5552 | coding->eol_type = CODING_EOL_LF; | |
5553 | /* We had better recover the original eol format if we | |
8ca3766a | 5554 | encounter an inconsistent eol format while decoding. */ |
d46c5b12 KH |
5555 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
5556 | } | |
5557 | } | |
5558 | ||
d46c5b12 KH |
5559 | /* Now we convert the text. */ |
5560 | ||
5561 | /* For encoding, we must process pre-write-conversion in advance. */ | |
b73bfc1c KH |
5562 | if (! inhibit_pre_post_conversion |
5563 | && encodep | |
d46c5b12 KH |
5564 | && SYMBOLP (coding->pre_write_conversion) |
5565 | && ! NILP (Ffboundp (coding->pre_write_conversion))) | |
5566 | { | |
2b4f9037 KH |
5567 | /* The function in pre-write-conversion may put a new text in a |
5568 | new buffer. */ | |
0007bdd0 KH |
5569 | struct buffer *prev = current_buffer; |
5570 | Lisp_Object new; | |
d46c5b12 | 5571 | |
1c7457e2 | 5572 | record_unwind_protect (code_convert_region_unwind, |
24a948a7 | 5573 | Vlast_coding_system_used); |
b843d1ae KH |
5574 | /* We should not call any more pre-write/post-read-conversion |
5575 | functions while this pre-write-conversion is running. */ | |
5576 | inhibit_pre_post_conversion = 1; | |
b39f748c AS |
5577 | call2 (coding->pre_write_conversion, |
5578 | make_number (from), make_number (to)); | |
b843d1ae KH |
5579 | inhibit_pre_post_conversion = 0; |
5580 | /* Discard the unwind protect. */ | |
5581 | specpdl_ptr--; | |
5582 | ||
d46c5b12 KH |
5583 | if (current_buffer != prev) |
5584 | { | |
5585 | len = ZV - BEGV; | |
0007bdd0 | 5586 | new = Fcurrent_buffer (); |
d46c5b12 | 5587 | set_buffer_internal_1 (prev); |
7dae4502 | 5588 | del_range_2 (from, from_byte, to, to_byte, 0); |
e133c8fa | 5589 | TEMP_SET_PT_BOTH (from, from_byte); |
0007bdd0 KH |
5590 | insert_from_buffer (XBUFFER (new), 1, len, 0); |
5591 | Fkill_buffer (new); | |
e133c8fa KH |
5592 | if (orig_point >= to) |
5593 | orig_point += len - orig_len; | |
5594 | else if (orig_point > from) | |
5595 | orig_point = from; | |
5596 | orig_len = len; | |
d46c5b12 | 5597 | to = from + len; |
b73bfc1c KH |
5598 | from_byte = CHAR_TO_BYTE (from); |
5599 | to_byte = CHAR_TO_BYTE (to); | |
d46c5b12 | 5600 | len_byte = to_byte - from_byte; |
e133c8fa | 5601 | TEMP_SET_PT_BOTH (from, from_byte); |
d46c5b12 KH |
5602 | } |
5603 | } | |
5604 | ||
12410ef1 | 5605 | if (replace) |
72d1a715 RS |
5606 | { |
5607 | if (! EQ (current_buffer->undo_list, Qt)) | |
5608 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); | |
5609 | else | |
5610 | { | |
5611 | nchars_del = to - from; | |
5612 | nbytes_del = to_byte - from_byte; | |
5613 | } | |
5614 | } | |
12410ef1 | 5615 | |
ec6d2bb8 KH |
5616 | if (coding->composing != COMPOSITION_DISABLED) |
5617 | { | |
5618 | if (encodep) | |
5619 | coding_save_composition (coding, from, to, Fcurrent_buffer ()); | |
5620 | else | |
5621 | coding_allocate_composition_data (coding, from); | |
5622 | } | |
fb88bf2d | 5623 | |
b73bfc1c | 5624 | /* Try to skip the heading and tailing ASCIIs. */ |
4956c225 KH |
5625 | if (coding->type != coding_type_ccl) |
5626 | { | |
5627 | int from_byte_orig = from_byte, to_byte_orig = to_byte; | |
ec6d2bb8 | 5628 | |
4956c225 KH |
5629 | if (from < GPT && GPT < to) |
5630 | move_gap_both (from, from_byte); | |
5631 | SHRINK_CONVERSION_REGION (&from_byte, &to_byte, coding, NULL, encodep); | |
5632 | if (from_byte == to_byte | |
5633 | && (encodep || NILP (coding->post_read_conversion)) | |
5634 | && ! CODING_REQUIRE_FLUSHING (coding)) | |
5635 | { | |
5636 | coding->produced = len_byte; | |
5637 | coding->produced_char = len; | |
5638 | if (!replace) | |
5639 | /* We must record and adjust for this new text now. */ | |
5640 | adjust_after_insert (from, from_byte_orig, to, to_byte_orig, len); | |
5641 | return 0; | |
5642 | } | |
5643 | ||
5644 | head_skip = from_byte - from_byte_orig; | |
5645 | tail_skip = to_byte_orig - to_byte; | |
5646 | total_skip = head_skip + tail_skip; | |
5647 | from += head_skip; | |
5648 | to -= tail_skip; | |
5649 | len -= total_skip; len_byte -= total_skip; | |
5650 | } | |
d46c5b12 | 5651 | |
8ca3766a | 5652 | /* For conversion, we must put the gap before the text in addition to |
fb88bf2d KH |
5653 | making the gap larger for efficient decoding. The required gap |
5654 | size starts from 2000 which is the magic number used in make_gap. | |
5655 | But, after one batch of conversion, it will be incremented if we | |
5656 | find that it is not enough . */ | |
d46c5b12 KH |
5657 | require = 2000; |
5658 | ||
5659 | if (GAP_SIZE < require) | |
5660 | make_gap (require - GAP_SIZE); | |
5661 | move_gap_both (from, from_byte); | |
5662 | ||
d46c5b12 | 5663 | inserted = inserted_byte = 0; |
fb88bf2d KH |
5664 | |
5665 | GAP_SIZE += len_byte; | |
5666 | ZV -= len; | |
5667 | Z -= len; | |
5668 | ZV_BYTE -= len_byte; | |
5669 | Z_BYTE -= len_byte; | |
5670 | ||
d9f9a1bc GM |
5671 | if (GPT - BEG < BEG_UNCHANGED) |
5672 | BEG_UNCHANGED = GPT - BEG; | |
5673 | if (Z - GPT < END_UNCHANGED) | |
5674 | END_UNCHANGED = Z - GPT; | |
f2558efd | 5675 | |
b73bfc1c KH |
5676 | if (!encodep && coding->src_multibyte) |
5677 | { | |
5678 | /* Decoding routines expects that the source text is unibyte. | |
5679 | We must convert 8-bit characters of multibyte form to | |
5680 | unibyte. */ | |
5681 | int len_byte_orig = len_byte; | |
5682 | len_byte = str_as_unibyte (GAP_END_ADDR - len_byte, len_byte); | |
5683 | if (len_byte < len_byte_orig) | |
5684 | safe_bcopy (GAP_END_ADDR - len_byte_orig, GAP_END_ADDR - len_byte, | |
5685 | len_byte); | |
5686 | coding->src_multibyte = 0; | |
5687 | } | |
5688 | ||
d46c5b12 KH |
5689 | for (;;) |
5690 | { | |
fb88bf2d | 5691 | int result; |
d46c5b12 | 5692 | |
ec6d2bb8 | 5693 | /* The buffer memory is now: |
b73bfc1c KH |
5694 | +--------+converted-text+---------+-------original-text-------+---+ |
5695 | |<-from->|<--inserted-->|---------|<--------len_byte--------->|---| | |
5696 | |<---------------------- GAP ----------------------->| */ | |
ec6d2bb8 KH |
5697 | src = GAP_END_ADDR - len_byte; |
5698 | dst = GPT_ADDR + inserted_byte; | |
5699 | ||
d46c5b12 | 5700 | if (encodep) |
fb88bf2d | 5701 | result = encode_coding (coding, src, dst, len_byte, 0); |
d46c5b12 | 5702 | else |
0e79d667 RS |
5703 | { |
5704 | if (coding->composing != COMPOSITION_DISABLED) | |
5705 | coding->cmp_data->char_offset = from + inserted; | |
5706 | result = decode_coding (coding, src, dst, len_byte, 0); | |
5707 | } | |
ec6d2bb8 KH |
5708 | |
5709 | /* The buffer memory is now: | |
b73bfc1c KH |
5710 | +--------+-------converted-text----+--+------original-text----+---+ |
5711 | |<-from->|<-inserted->|<-produced->|--|<-(len_byte-consumed)->|---| | |
5712 | |<---------------------- GAP ----------------------->| */ | |
ec6d2bb8 | 5713 | |
d46c5b12 KH |
5714 | inserted += coding->produced_char; |
5715 | inserted_byte += coding->produced; | |
d46c5b12 | 5716 | len_byte -= coding->consumed; |
ec6d2bb8 KH |
5717 | |
5718 | if (result == CODING_FINISH_INSUFFICIENT_CMP) | |
5719 | { | |
5720 | coding_allocate_composition_data (coding, from + inserted); | |
5721 | continue; | |
5722 | } | |
5723 | ||
fb88bf2d | 5724 | src += coding->consumed; |
3636f7a3 | 5725 | dst += coding->produced; |
d46c5b12 | 5726 | |
9864ebce KH |
5727 | if (result == CODING_FINISH_NORMAL) |
5728 | { | |
5729 | src += len_byte; | |
5730 | break; | |
5731 | } | |
d46c5b12 KH |
5732 | if (! encodep && result == CODING_FINISH_INCONSISTENT_EOL) |
5733 | { | |
fb88bf2d | 5734 | unsigned char *pend = dst, *p = pend - inserted_byte; |
38edf7d4 | 5735 | Lisp_Object eol_type; |
d46c5b12 KH |
5736 | |
5737 | /* Encode LFs back to the original eol format (CR or CRLF). */ | |
5738 | if (coding->eol_type == CODING_EOL_CR) | |
5739 | { | |
5740 | while (p < pend) if (*p++ == '\n') p[-1] = '\r'; | |
5741 | } | |
5742 | else | |
5743 | { | |
d46c5b12 KH |
5744 | int count = 0; |
5745 | ||
fb88bf2d KH |
5746 | while (p < pend) if (*p++ == '\n') count++; |
5747 | if (src - dst < count) | |
d46c5b12 | 5748 | { |
38edf7d4 | 5749 | /* We don't have sufficient room for encoding LFs |
fb88bf2d KH |
5750 | back to CRLF. We must record converted and |
5751 | not-yet-converted text back to the buffer | |
5752 | content, enlarge the gap, then record them out of | |
5753 | the buffer contents again. */ | |
5754 | int add = len_byte + inserted_byte; | |
5755 | ||
5756 | GAP_SIZE -= add; | |
5757 | ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
5758 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5759 | make_gap (count - GAP_SIZE); | |
5760 | GAP_SIZE += add; | |
5761 | ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
5762 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
5763 | /* Don't forget to update SRC, DST, and PEND. */ | |
5764 | src = GAP_END_ADDR - len_byte; | |
5765 | dst = GPT_ADDR + inserted_byte; | |
5766 | pend = dst; | |
d46c5b12 | 5767 | } |
d46c5b12 KH |
5768 | inserted += count; |
5769 | inserted_byte += count; | |
fb88bf2d KH |
5770 | coding->produced += count; |
5771 | p = dst = pend + count; | |
5772 | while (count) | |
5773 | { | |
5774 | *--p = *--pend; | |
5775 | if (*p == '\n') count--, *--p = '\r'; | |
5776 | } | |
d46c5b12 KH |
5777 | } |
5778 | ||
5779 | /* Suppress eol-format conversion in the further conversion. */ | |
5780 | coding->eol_type = CODING_EOL_LF; | |
5781 | ||
38edf7d4 KH |
5782 | /* Set the coding system symbol to that for Unix-like EOL. */ |
5783 | eol_type = Fget (saved_coding_symbol, Qeol_type); | |
5784 | if (VECTORP (eol_type) | |
5785 | && XVECTOR (eol_type)->size == 3 | |
5786 | && SYMBOLP (XVECTOR (eol_type)->contents[CODING_EOL_LF])) | |
5787 | coding->symbol = XVECTOR (eol_type)->contents[CODING_EOL_LF]; | |
5788 | else | |
5789 | coding->symbol = saved_coding_symbol; | |
93dec019 | 5790 | |
fb88bf2d | 5791 | continue; |
d46c5b12 KH |
5792 | } |
5793 | if (len_byte <= 0) | |
944bd420 KH |
5794 | { |
5795 | if (coding->type != coding_type_ccl | |
5796 | || coding->mode & CODING_MODE_LAST_BLOCK) | |
5797 | break; | |
5798 | coding->mode |= CODING_MODE_LAST_BLOCK; | |
5799 | continue; | |
5800 | } | |
d46c5b12 KH |
5801 | if (result == CODING_FINISH_INSUFFICIENT_SRC) |
5802 | { | |
5803 | /* The source text ends in invalid codes. Let's just | |
5804 | make them valid buffer contents, and finish conversion. */ | |
70ad9fc4 GM |
5805 | if (multibyte_p) |
5806 | { | |
5807 | unsigned char *start = dst; | |
93dec019 | 5808 | |
70ad9fc4 GM |
5809 | inserted += len_byte; |
5810 | while (len_byte--) | |
5811 | { | |
5812 | int c = *src++; | |
5813 | dst += CHAR_STRING (c, dst); | |
5814 | } | |
5815 | ||
5816 | inserted_byte += dst - start; | |
5817 | } | |
5818 | else | |
5819 | { | |
5820 | inserted += len_byte; | |
5821 | inserted_byte += len_byte; | |
5822 | while (len_byte--) | |
5823 | *dst++ = *src++; | |
5824 | } | |
d46c5b12 KH |
5825 | break; |
5826 | } | |
9864ebce KH |
5827 | if (result == CODING_FINISH_INTERRUPT) |
5828 | { | |
5829 | /* The conversion procedure was interrupted by a user. */ | |
9864ebce KH |
5830 | break; |
5831 | } | |
5832 | /* Now RESULT == CODING_FINISH_INSUFFICIENT_DST */ | |
5833 | if (coding->consumed < 1) | |
5834 | { | |
5835 | /* It's quite strange to require more memory without | |
5836 | consuming any bytes. Perhaps CCL program bug. */ | |
9864ebce KH |
5837 | break; |
5838 | } | |
fb88bf2d KH |
5839 | if (first) |
5840 | { | |
5841 | /* We have just done the first batch of conversion which was | |
8ca3766a | 5842 | stopped because of insufficient gap. Let's reconsider the |
fb88bf2d KH |
5843 | required gap size (i.e. SRT - DST) now. |
5844 | ||
5845 | We have converted ORIG bytes (== coding->consumed) into | |
5846 | NEW bytes (coding->produced). To convert the remaining | |
5847 | LEN bytes, we may need REQUIRE bytes of gap, where: | |
5848 | REQUIRE + LEN_BYTE = LEN_BYTE * (NEW / ORIG) | |
5849 | REQUIRE = LEN_BYTE * (NEW - ORIG) / ORIG | |
5850 | Here, we are sure that NEW >= ORIG. */ | |
b3385c28 KH |
5851 | float ratio; |
5852 | ||
5853 | if (coding->produced <= coding->consumed) | |
5854 | { | |
5855 | /* This happens because of CCL-based coding system with | |
5856 | eol-type CRLF. */ | |
5857 | require = 0; | |
5858 | } | |
5859 | else | |
5860 | { | |
5861 | ratio = (coding->produced - coding->consumed) / coding->consumed; | |
5862 | require = len_byte * ratio; | |
5863 | } | |
fb88bf2d KH |
5864 | first = 0; |
5865 | } | |
5866 | if ((src - dst) < (require + 2000)) | |
5867 | { | |
5868 | /* See the comment above the previous call of make_gap. */ | |
5869 | int add = len_byte + inserted_byte; | |
5870 | ||
5871 | GAP_SIZE -= add; | |
5872 | ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
5873 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5874 | make_gap (require + 2000); | |
5875 | GAP_SIZE += add; | |
5876 | ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
5877 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
fb88bf2d | 5878 | } |
d46c5b12 | 5879 | } |
fb88bf2d KH |
5880 | if (src - dst > 0) *dst = 0; /* Put an anchor. */ |
5881 | ||
b73bfc1c KH |
5882 | if (encodep && coding->dst_multibyte) |
5883 | { | |
5884 | /* The output is unibyte. We must convert 8-bit characters to | |
5885 | multibyte form. */ | |
5886 | if (inserted_byte * 2 > GAP_SIZE) | |
5887 | { | |
5888 | GAP_SIZE -= inserted_byte; | |
5889 | ZV += inserted_byte; Z += inserted_byte; | |
5890 | ZV_BYTE += inserted_byte; Z_BYTE += inserted_byte; | |
5891 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5892 | make_gap (inserted_byte - GAP_SIZE); | |
5893 | GAP_SIZE += inserted_byte; | |
5894 | ZV -= inserted_byte; Z -= inserted_byte; | |
5895 | ZV_BYTE -= inserted_byte; Z_BYTE -= inserted_byte; | |
5896 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
5897 | } | |
5898 | inserted_byte = str_to_multibyte (GPT_ADDR, GAP_SIZE, inserted_byte); | |
5899 | } | |
7553d0e1 | 5900 | |
93dec019 | 5901 | /* If we shrank the conversion area, adjust it now. */ |
12410ef1 KH |
5902 | if (total_skip > 0) |
5903 | { | |
5904 | if (tail_skip > 0) | |
5905 | safe_bcopy (GAP_END_ADDR, GPT_ADDR + inserted_byte, tail_skip); | |
5906 | inserted += total_skip; inserted_byte += total_skip; | |
5907 | GAP_SIZE += total_skip; | |
5908 | GPT -= head_skip; GPT_BYTE -= head_skip; | |
5909 | ZV -= total_skip; ZV_BYTE -= total_skip; | |
5910 | Z -= total_skip; Z_BYTE -= total_skip; | |
5911 | from -= head_skip; from_byte -= head_skip; | |
5912 | to += tail_skip; to_byte += tail_skip; | |
5913 | } | |
5914 | ||
6abb9bd9 | 5915 | prev_Z = Z; |
72d1a715 RS |
5916 | if (! EQ (current_buffer->undo_list, Qt)) |
5917 | adjust_after_replace (from, from_byte, deletion, inserted, inserted_byte); | |
5918 | else | |
5919 | adjust_after_replace_noundo (from, from_byte, nchars_del, nbytes_del, | |
5920 | inserted, inserted_byte); | |
6abb9bd9 | 5921 | inserted = Z - prev_Z; |
4ed46869 | 5922 | |
ec6d2bb8 KH |
5923 | if (!encodep && coding->cmp_data && coding->cmp_data->used) |
5924 | coding_restore_composition (coding, Fcurrent_buffer ()); | |
5925 | coding_free_composition_data (coding); | |
5926 | ||
b73bfc1c KH |
5927 | if (! inhibit_pre_post_conversion |
5928 | && ! encodep && ! NILP (coding->post_read_conversion)) | |
d46c5b12 | 5929 | { |
2b4f9037 | 5930 | Lisp_Object val; |
1c7457e2 | 5931 | Lisp_Object saved_coding_system; |
4ed46869 | 5932 | |
e133c8fa KH |
5933 | if (from != PT) |
5934 | TEMP_SET_PT_BOTH (from, from_byte); | |
6abb9bd9 | 5935 | prev_Z = Z; |
1c7457e2 KH |
5936 | record_unwind_protect (code_convert_region_unwind, |
5937 | Vlast_coding_system_used); | |
5938 | saved_coding_system = Vlast_coding_system_used; | |
5939 | Vlast_coding_system_used = coding->symbol; | |
b843d1ae KH |
5940 | /* We should not call any more pre-write/post-read-conversion |
5941 | functions while this post-read-conversion is running. */ | |
5942 | inhibit_pre_post_conversion = 1; | |
2b4f9037 | 5943 | val = call1 (coding->post_read_conversion, make_number (inserted)); |
b843d1ae | 5944 | inhibit_pre_post_conversion = 0; |
1c7457e2 KH |
5945 | coding->symbol = Vlast_coding_system_used; |
5946 | Vlast_coding_system_used = saved_coding_system; | |
b843d1ae KH |
5947 | /* Discard the unwind protect. */ |
5948 | specpdl_ptr--; | |
b7826503 | 5949 | CHECK_NUMBER (val); |
944bd420 | 5950 | inserted += Z - prev_Z; |
e133c8fa KH |
5951 | } |
5952 | ||
5953 | if (orig_point >= from) | |
5954 | { | |
5955 | if (orig_point >= from + orig_len) | |
5956 | orig_point += inserted - orig_len; | |
5957 | else | |
5958 | orig_point = from; | |
5959 | TEMP_SET_PT (orig_point); | |
d46c5b12 | 5960 | } |
4ed46869 | 5961 | |
ec6d2bb8 KH |
5962 | if (replace) |
5963 | { | |
5964 | signal_after_change (from, to - from, inserted); | |
e19539f1 | 5965 | update_compositions (from, from + inserted, CHECK_BORDER); |
ec6d2bb8 | 5966 | } |
2b4f9037 | 5967 | |
fb88bf2d | 5968 | { |
12410ef1 KH |
5969 | coding->consumed = to_byte - from_byte; |
5970 | coding->consumed_char = to - from; | |
5971 | coding->produced = inserted_byte; | |
5972 | coding->produced_char = inserted; | |
fb88bf2d | 5973 | } |
7553d0e1 | 5974 | |
fb88bf2d | 5975 | return 0; |
d46c5b12 KH |
5976 | } |
5977 | ||
5978 | Lisp_Object | |
b73bfc1c KH |
5979 | run_pre_post_conversion_on_str (str, coding, encodep) |
5980 | Lisp_Object str; | |
5981 | struct coding_system *coding; | |
5982 | int encodep; | |
5983 | { | |
aed13378 | 5984 | int count = SPECPDL_INDEX (); |
cf3b32fc | 5985 | struct gcpro gcpro1, gcpro2; |
b73bfc1c | 5986 | int multibyte = STRING_MULTIBYTE (str); |
3fd9494b RS |
5987 | Lisp_Object buffer; |
5988 | struct buffer *buf; | |
cf3b32fc | 5989 | Lisp_Object old_deactivate_mark; |
b73bfc1c KH |
5990 | |
5991 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
1c7457e2 KH |
5992 | record_unwind_protect (code_convert_region_unwind, |
5993 | Vlast_coding_system_used); | |
cf3b32fc RS |
5994 | /* It is not crucial to specbind this. */ |
5995 | old_deactivate_mark = Vdeactivate_mark; | |
5996 | GCPRO2 (str, old_deactivate_mark); | |
3fd9494b RS |
5997 | |
5998 | buffer = Fget_buffer_create (build_string (" *code-converting-work*")); | |
5999 | buf = XBUFFER (buffer); | |
6000 | ||
6ed0af67 | 6001 | delete_all_overlays (buf); |
3fd9494b RS |
6002 | buf->directory = current_buffer->directory; |
6003 | buf->read_only = Qnil; | |
6004 | buf->filename = Qnil; | |
6005 | buf->undo_list = Qt; | |
6ed0af67 SM |
6006 | eassert (buf->overlays_before == NULL); |
6007 | eassert (buf->overlays_after == NULL); | |
3fd9494b RS |
6008 | |
6009 | set_buffer_internal (buf); | |
b73bfc1c KH |
6010 | /* We must insert the contents of STR as is without |
6011 | unibyte<->multibyte conversion. For that, we adjust the | |
6012 | multibyteness of the working buffer to that of STR. */ | |
6013 | Ferase_buffer (); | |
3fd9494b RS |
6014 | buf->enable_multibyte_characters = multibyte ? Qt : Qnil; |
6015 | ||
b73bfc1c | 6016 | insert_from_string (str, 0, 0, |
d5db4077 | 6017 | SCHARS (str), SBYTES (str), 0); |
b73bfc1c KH |
6018 | UNGCPRO; |
6019 | inhibit_pre_post_conversion = 1; | |
6020 | if (encodep) | |
6021 | call2 (coding->pre_write_conversion, make_number (BEG), make_number (Z)); | |
6022 | else | |
6bac5b12 | 6023 | { |
1c7457e2 | 6024 | Vlast_coding_system_used = coding->symbol; |
6bac5b12 KH |
6025 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
6026 | call1 (coding->post_read_conversion, make_number (Z - BEG)); | |
1c7457e2 | 6027 | coding->symbol = Vlast_coding_system_used; |
6bac5b12 | 6028 | } |
b73bfc1c | 6029 | inhibit_pre_post_conversion = 0; |
cf3b32fc | 6030 | Vdeactivate_mark = old_deactivate_mark; |
78108bcd | 6031 | str = make_buffer_string (BEG, Z, 1); |
b73bfc1c KH |
6032 | return unbind_to (count, str); |
6033 | } | |
6034 | ||
6035 | Lisp_Object | |
6036 | decode_coding_string (str, coding, nocopy) | |
d46c5b12 | 6037 | Lisp_Object str; |
4ed46869 | 6038 | struct coding_system *coding; |
b73bfc1c | 6039 | int nocopy; |
4ed46869 | 6040 | { |
d46c5b12 | 6041 | int len; |
73be902c | 6042 | struct conversion_buffer buf; |
da55a2b7 | 6043 | int from, to_byte; |
84d60297 | 6044 | Lisp_Object saved_coding_symbol; |
d46c5b12 | 6045 | int result; |
78108bcd | 6046 | int require_decoding; |
73be902c KH |
6047 | int shrinked_bytes = 0; |
6048 | Lisp_Object newstr; | |
2391eaa4 | 6049 | int consumed, consumed_char, produced, produced_char; |
4ed46869 | 6050 | |
b73bfc1c | 6051 | from = 0; |
d5db4077 | 6052 | to_byte = SBYTES (str); |
4ed46869 | 6053 | |
8844fa83 | 6054 | saved_coding_symbol = coding->symbol; |
764ca8da KH |
6055 | coding->src_multibyte = STRING_MULTIBYTE (str); |
6056 | coding->dst_multibyte = 1; | |
b73bfc1c | 6057 | if (CODING_REQUIRE_DETECTION (coding)) |
d46c5b12 KH |
6058 | { |
6059 | /* See the comments in code_convert_region. */ | |
6060 | if (coding->type == coding_type_undecided) | |
6061 | { | |
d5db4077 | 6062 | detect_coding (coding, SDATA (str), to_byte); |
d46c5b12 | 6063 | if (coding->type == coding_type_undecided) |
d280ccb6 KH |
6064 | { |
6065 | coding->type = coding_type_emacs_mule; | |
6066 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
6067 | /* As emacs-mule decoder will handle composition, we | |
6068 | need this setting to allocate coding->cmp_data | |
6069 | later. */ | |
6070 | coding->composing = COMPOSITION_NO; | |
6071 | } | |
d46c5b12 | 6072 | } |
aaaf0b1e KH |
6073 | if (coding->eol_type == CODING_EOL_UNDECIDED |
6074 | && coding->type != coding_type_ccl) | |
d46c5b12 KH |
6075 | { |
6076 | saved_coding_symbol = coding->symbol; | |
d5db4077 | 6077 | detect_eol (coding, SDATA (str), to_byte); |
d46c5b12 KH |
6078 | if (coding->eol_type == CODING_EOL_UNDECIDED) |
6079 | coding->eol_type = CODING_EOL_LF; | |
6080 | /* We had better recover the original eol format if we | |
8ca3766a | 6081 | encounter an inconsistent eol format while decoding. */ |
d46c5b12 KH |
6082 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
6083 | } | |
6084 | } | |
4ed46869 | 6085 | |
764ca8da KH |
6086 | if (coding->type == coding_type_no_conversion |
6087 | || coding->type == coding_type_raw_text) | |
6088 | coding->dst_multibyte = 0; | |
6089 | ||
78108bcd | 6090 | require_decoding = CODING_REQUIRE_DECODING (coding); |
ec6d2bb8 | 6091 | |
b73bfc1c | 6092 | if (STRING_MULTIBYTE (str)) |
d46c5b12 | 6093 | { |
b73bfc1c KH |
6094 | /* Decoding routines expect the source text to be unibyte. */ |
6095 | str = Fstring_as_unibyte (str); | |
d5db4077 | 6096 | to_byte = SBYTES (str); |
b73bfc1c | 6097 | nocopy = 1; |
764ca8da | 6098 | coding->src_multibyte = 0; |
b73bfc1c | 6099 | } |
ec6d2bb8 | 6100 | |
b73bfc1c | 6101 | /* Try to skip the heading and tailing ASCIIs. */ |
78108bcd | 6102 | if (require_decoding && coding->type != coding_type_ccl) |
4956c225 | 6103 | { |
d5db4077 | 6104 | SHRINK_CONVERSION_REGION (&from, &to_byte, coding, SDATA (str), |
4956c225 KH |
6105 | 0); |
6106 | if (from == to_byte) | |
78108bcd | 6107 | require_decoding = 0; |
d5db4077 | 6108 | shrinked_bytes = from + (SBYTES (str) - to_byte); |
4956c225 | 6109 | } |
b73bfc1c | 6110 | |
439ad9ea KH |
6111 | if (!require_decoding |
6112 | && !(SYMBOLP (coding->post_read_conversion) | |
6113 | && !NILP (Ffboundp (coding->post_read_conversion)))) | |
78108bcd | 6114 | { |
d5db4077 KR |
6115 | coding->consumed = SBYTES (str); |
6116 | coding->consumed_char = SCHARS (str); | |
78108bcd KH |
6117 | if (coding->dst_multibyte) |
6118 | { | |
6119 | str = Fstring_as_multibyte (str); | |
6120 | nocopy = 1; | |
6121 | } | |
d5db4077 KR |
6122 | coding->produced = SBYTES (str); |
6123 | coding->produced_char = SCHARS (str); | |
78108bcd KH |
6124 | return (nocopy ? str : Fcopy_sequence (str)); |
6125 | } | |
6126 | ||
6127 | if (coding->composing != COMPOSITION_DISABLED) | |
6128 | coding_allocate_composition_data (coding, from); | |
b73bfc1c | 6129 | len = decoding_buffer_size (coding, to_byte - from); |
73be902c | 6130 | allocate_conversion_buffer (buf, len); |
4ed46869 | 6131 | |
2391eaa4 | 6132 | consumed = consumed_char = produced = produced_char = 0; |
73be902c | 6133 | while (1) |
4ed46869 | 6134 | { |
d5db4077 | 6135 | result = decode_coding (coding, SDATA (str) + from + consumed, |
73be902c KH |
6136 | buf.data + produced, to_byte - from - consumed, |
6137 | buf.size - produced); | |
6138 | consumed += coding->consumed; | |
2391eaa4 | 6139 | consumed_char += coding->consumed_char; |
73be902c KH |
6140 | produced += coding->produced; |
6141 | produced_char += coding->produced_char; | |
2391eaa4 KH |
6142 | if (result == CODING_FINISH_NORMAL |
6143 | || (result == CODING_FINISH_INSUFFICIENT_SRC | |
6144 | && coding->consumed == 0)) | |
73be902c KH |
6145 | break; |
6146 | if (result == CODING_FINISH_INSUFFICIENT_CMP) | |
6147 | coding_allocate_composition_data (coding, from + produced_char); | |
6148 | else if (result == CODING_FINISH_INSUFFICIENT_DST) | |
6149 | extend_conversion_buffer (&buf); | |
6150 | else if (result == CODING_FINISH_INCONSISTENT_EOL) | |
6151 | { | |
8844fa83 KH |
6152 | Lisp_Object eol_type; |
6153 | ||
73be902c KH |
6154 | /* Recover the original EOL format. */ |
6155 | if (coding->eol_type == CODING_EOL_CR) | |
6156 | { | |
6157 | unsigned char *p; | |
6158 | for (p = buf.data; p < buf.data + produced; p++) | |
6159 | if (*p == '\n') *p = '\r'; | |
6160 | } | |
6161 | else if (coding->eol_type == CODING_EOL_CRLF) | |
6162 | { | |
6163 | int num_eol = 0; | |
6164 | unsigned char *p0, *p1; | |
6165 | for (p0 = buf.data, p1 = p0 + produced; p0 < p1; p0++) | |
6166 | if (*p0 == '\n') num_eol++; | |
6167 | if (produced + num_eol >= buf.size) | |
6168 | extend_conversion_buffer (&buf); | |
6169 | for (p0 = buf.data + produced, p1 = p0 + num_eol; p0 > buf.data;) | |
6170 | { | |
6171 | *--p1 = *--p0; | |
6172 | if (*p0 == '\n') *--p1 = '\r'; | |
6173 | } | |
6174 | produced += num_eol; | |
6175 | produced_char += num_eol; | |
93dec019 | 6176 | } |
8844fa83 | 6177 | /* Suppress eol-format conversion in the further conversion. */ |
73be902c | 6178 | coding->eol_type = CODING_EOL_LF; |
8844fa83 KH |
6179 | |
6180 | /* Set the coding system symbol to that for Unix-like EOL. */ | |
6181 | eol_type = Fget (saved_coding_symbol, Qeol_type); | |
6182 | if (VECTORP (eol_type) | |
6183 | && XVECTOR (eol_type)->size == 3 | |
6184 | && SYMBOLP (XVECTOR (eol_type)->contents[CODING_EOL_LF])) | |
6185 | coding->symbol = XVECTOR (eol_type)->contents[CODING_EOL_LF]; | |
6186 | else | |
6187 | coding->symbol = saved_coding_symbol; | |
6188 | ||
6189 | ||
73be902c | 6190 | } |
4ed46869 | 6191 | } |
d46c5b12 | 6192 | |
2391eaa4 KH |
6193 | coding->consumed = consumed; |
6194 | coding->consumed_char = consumed_char; | |
6195 | coding->produced = produced; | |
6196 | coding->produced_char = produced_char; | |
6197 | ||
78108bcd | 6198 | if (coding->dst_multibyte) |
73be902c KH |
6199 | newstr = make_uninit_multibyte_string (produced_char + shrinked_bytes, |
6200 | produced + shrinked_bytes); | |
78108bcd | 6201 | else |
73be902c KH |
6202 | newstr = make_uninit_string (produced + shrinked_bytes); |
6203 | if (from > 0) | |
a4244313 KR |
6204 | STRING_COPYIN (newstr, 0, SDATA (str), from); |
6205 | STRING_COPYIN (newstr, from, buf.data, produced); | |
73be902c | 6206 | if (shrinked_bytes > from) |
a4244313 KR |
6207 | STRING_COPYIN (newstr, from + produced, |
6208 | SDATA (str) + to_byte, | |
6209 | shrinked_bytes - from); | |
73be902c | 6210 | free_conversion_buffer (&buf); |
b73bfc1c KH |
6211 | |
6212 | if (coding->cmp_data && coding->cmp_data->used) | |
73be902c | 6213 | coding_restore_composition (coding, newstr); |
b73bfc1c KH |
6214 | coding_free_composition_data (coding); |
6215 | ||
6216 | if (SYMBOLP (coding->post_read_conversion) | |
6217 | && !NILP (Ffboundp (coding->post_read_conversion))) | |
73be902c | 6218 | newstr = run_pre_post_conversion_on_str (newstr, coding, 0); |
b73bfc1c | 6219 | |
73be902c | 6220 | return newstr; |
b73bfc1c KH |
6221 | } |
6222 | ||
6223 | Lisp_Object | |
6224 | encode_coding_string (str, coding, nocopy) | |
6225 | Lisp_Object str; | |
6226 | struct coding_system *coding; | |
6227 | int nocopy; | |
6228 | { | |
6229 | int len; | |
73be902c | 6230 | struct conversion_buffer buf; |
b73bfc1c | 6231 | int from, to, to_byte; |
b73bfc1c | 6232 | int result; |
73be902c KH |
6233 | int shrinked_bytes = 0; |
6234 | Lisp_Object newstr; | |
2391eaa4 | 6235 | int consumed, consumed_char, produced, produced_char; |
b73bfc1c KH |
6236 | |
6237 | if (SYMBOLP (coding->pre_write_conversion) | |
6238 | && !NILP (Ffboundp (coding->pre_write_conversion))) | |
6bac5b12 | 6239 | str = run_pre_post_conversion_on_str (str, coding, 1); |
b73bfc1c KH |
6240 | |
6241 | from = 0; | |
d5db4077 KR |
6242 | to = SCHARS (str); |
6243 | to_byte = SBYTES (str); | |
b73bfc1c | 6244 | |
e2c06b17 KH |
6245 | /* Encoding routines determine the multibyteness of the source text |
6246 | by coding->src_multibyte. */ | |
6247 | coding->src_multibyte = STRING_MULTIBYTE (str); | |
6248 | coding->dst_multibyte = 0; | |
b73bfc1c | 6249 | if (! CODING_REQUIRE_ENCODING (coding)) |
826bfb8b | 6250 | { |
d5db4077 KR |
6251 | coding->consumed = SBYTES (str); |
6252 | coding->consumed_char = SCHARS (str); | |
b73bfc1c KH |
6253 | if (STRING_MULTIBYTE (str)) |
6254 | { | |
6255 | str = Fstring_as_unibyte (str); | |
6256 | nocopy = 1; | |
6257 | } | |
d5db4077 KR |
6258 | coding->produced = SBYTES (str); |
6259 | coding->produced_char = SCHARS (str); | |
b73bfc1c | 6260 | return (nocopy ? str : Fcopy_sequence (str)); |
826bfb8b KH |
6261 | } |
6262 | ||
b73bfc1c KH |
6263 | if (coding->composing != COMPOSITION_DISABLED) |
6264 | coding_save_composition (coding, from, to, str); | |
ec6d2bb8 | 6265 | |
b73bfc1c | 6266 | /* Try to skip the heading and tailing ASCIIs. */ |
4956c225 KH |
6267 | if (coding->type != coding_type_ccl) |
6268 | { | |
d5db4077 | 6269 | SHRINK_CONVERSION_REGION (&from, &to_byte, coding, SDATA (str), |
4956c225 KH |
6270 | 1); |
6271 | if (from == to_byte) | |
6272 | return (nocopy ? str : Fcopy_sequence (str)); | |
d5db4077 | 6273 | shrinked_bytes = from + (SBYTES (str) - to_byte); |
4956c225 | 6274 | } |
b73bfc1c KH |
6275 | |
6276 | len = encoding_buffer_size (coding, to_byte - from); | |
73be902c KH |
6277 | allocate_conversion_buffer (buf, len); |
6278 | ||
2391eaa4 | 6279 | consumed = consumed_char = produced = produced_char = 0; |
73be902c KH |
6280 | while (1) |
6281 | { | |
d5db4077 | 6282 | result = encode_coding (coding, SDATA (str) + from + consumed, |
73be902c KH |
6283 | buf.data + produced, to_byte - from - consumed, |
6284 | buf.size - produced); | |
6285 | consumed += coding->consumed; | |
2391eaa4 | 6286 | consumed_char += coding->consumed_char; |
13004bef | 6287 | produced += coding->produced; |
2391eaa4 KH |
6288 | produced_char += coding->produced_char; |
6289 | if (result == CODING_FINISH_NORMAL | |
6290 | || (result == CODING_FINISH_INSUFFICIENT_SRC | |
6291 | && coding->consumed == 0)) | |
73be902c KH |
6292 | break; |
6293 | /* Now result should be CODING_FINISH_INSUFFICIENT_DST. */ | |
6294 | extend_conversion_buffer (&buf); | |
6295 | } | |
6296 | ||
2391eaa4 KH |
6297 | coding->consumed = consumed; |
6298 | coding->consumed_char = consumed_char; | |
6299 | coding->produced = produced; | |
6300 | coding->produced_char = produced_char; | |
6301 | ||
73be902c | 6302 | newstr = make_uninit_string (produced + shrinked_bytes); |
b73bfc1c | 6303 | if (from > 0) |
a4244313 KR |
6304 | STRING_COPYIN (newstr, 0, SDATA (str), from); |
6305 | STRING_COPYIN (newstr, from, buf.data, produced); | |
73be902c | 6306 | if (shrinked_bytes > from) |
a4244313 KR |
6307 | STRING_COPYIN (newstr, from + produced, |
6308 | SDATA (str) + to_byte, | |
6309 | shrinked_bytes - from); | |
73be902c KH |
6310 | |
6311 | free_conversion_buffer (&buf); | |
ec6d2bb8 | 6312 | coding_free_composition_data (coding); |
b73bfc1c | 6313 | |
73be902c | 6314 | return newstr; |
4ed46869 KH |
6315 | } |
6316 | ||
6317 | \f | |
6318 | #ifdef emacs | |
1397dc18 | 6319 | /*** 8. Emacs Lisp library functions ***/ |
4ed46869 | 6320 | |
4ed46869 | 6321 | DEFUN ("coding-system-p", Fcoding_system_p, Scoding_system_p, 1, 1, 0, |
48b0f3ae PJ |
6322 | doc: /* Return t if OBJECT is nil or a coding-system. |
6323 | See the documentation of `make-coding-system' for information | |
6324 | about coding-system objects. */) | |
6325 | (obj) | |
4ed46869 KH |
6326 | Lisp_Object obj; |
6327 | { | |
4608c386 KH |
6328 | if (NILP (obj)) |
6329 | return Qt; | |
6330 | if (!SYMBOLP (obj)) | |
6331 | return Qnil; | |
6332 | /* Get coding-spec vector for OBJ. */ | |
6333 | obj = Fget (obj, Qcoding_system); | |
6334 | return ((VECTORP (obj) && XVECTOR (obj)->size == 5) | |
6335 | ? Qt : Qnil); | |
4ed46869 KH |
6336 | } |
6337 | ||
9d991de8 RS |
6338 | DEFUN ("read-non-nil-coding-system", Fread_non_nil_coding_system, |
6339 | Sread_non_nil_coding_system, 1, 1, 0, | |
48b0f3ae PJ |
6340 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. */) |
6341 | (prompt) | |
4ed46869 KH |
6342 | Lisp_Object prompt; |
6343 | { | |
e0e989f6 | 6344 | Lisp_Object val; |
9d991de8 RS |
6345 | do |
6346 | { | |
4608c386 KH |
6347 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
6348 | Qt, Qnil, Qcoding_system_history, Qnil, Qnil); | |
9d991de8 | 6349 | } |
d5db4077 | 6350 | while (SCHARS (val) == 0); |
e0e989f6 | 6351 | return (Fintern (val, Qnil)); |
4ed46869 KH |
6352 | } |
6353 | ||
9b787f3e | 6354 | DEFUN ("read-coding-system", Fread_coding_system, Sread_coding_system, 1, 2, 0, |
48b0f3ae PJ |
6355 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. |
6356 | If the user enters null input, return second argument DEFAULT-CODING-SYSTEM. */) | |
6357 | (prompt, default_coding_system) | |
9b787f3e | 6358 | Lisp_Object prompt, default_coding_system; |
4ed46869 | 6359 | { |
f44d27ce | 6360 | Lisp_Object val; |
9b787f3e | 6361 | if (SYMBOLP (default_coding_system)) |
57d25e6f | 6362 | default_coding_system = SYMBOL_NAME (default_coding_system); |
4608c386 | 6363 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
9b787f3e RS |
6364 | Qt, Qnil, Qcoding_system_history, |
6365 | default_coding_system, Qnil); | |
d5db4077 | 6366 | return (SCHARS (val) == 0 ? Qnil : Fintern (val, Qnil)); |
4ed46869 KH |
6367 | } |
6368 | ||
6369 | DEFUN ("check-coding-system", Fcheck_coding_system, Scheck_coding_system, | |
6370 | 1, 1, 0, | |
48b0f3ae PJ |
6371 | doc: /* Check validity of CODING-SYSTEM. |
6372 | If valid, return CODING-SYSTEM, else signal a `coding-system-error' error. | |
6373 | It is valid if it is a symbol with a non-nil `coding-system' property. | |
6374 | The value of property should be a vector of length 5. */) | |
6375 | (coding_system) | |
4ed46869 KH |
6376 | Lisp_Object coding_system; |
6377 | { | |
b7826503 | 6378 | CHECK_SYMBOL (coding_system); |
4ed46869 KH |
6379 | if (!NILP (Fcoding_system_p (coding_system))) |
6380 | return coding_system; | |
6381 | while (1) | |
02ba4723 | 6382 | Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil)); |
4ed46869 | 6383 | } |
3a73fa5d | 6384 | \f |
d46c5b12 | 6385 | Lisp_Object |
0a28aafb | 6386 | detect_coding_system (src, src_bytes, highest, multibytep) |
a4244313 | 6387 | const unsigned char *src; |
d46c5b12 | 6388 | int src_bytes, highest; |
0a28aafb | 6389 | int multibytep; |
4ed46869 KH |
6390 | { |
6391 | int coding_mask, eol_type; | |
d46c5b12 KH |
6392 | Lisp_Object val, tmp; |
6393 | int dummy; | |
4ed46869 | 6394 | |
0a28aafb | 6395 | coding_mask = detect_coding_mask (src, src_bytes, NULL, &dummy, multibytep); |
d46c5b12 KH |
6396 | eol_type = detect_eol_type (src, src_bytes, &dummy); |
6397 | if (eol_type == CODING_EOL_INCONSISTENT) | |
25b02698 | 6398 | eol_type = CODING_EOL_UNDECIDED; |
4ed46869 | 6399 | |
d46c5b12 | 6400 | if (!coding_mask) |
4ed46869 | 6401 | { |
27901516 | 6402 | val = Qundecided; |
d46c5b12 | 6403 | if (eol_type != CODING_EOL_UNDECIDED) |
4ed46869 | 6404 | { |
f44d27ce RS |
6405 | Lisp_Object val2; |
6406 | val2 = Fget (Qundecided, Qeol_type); | |
4ed46869 KH |
6407 | if (VECTORP (val2)) |
6408 | val = XVECTOR (val2)->contents[eol_type]; | |
6409 | } | |
80e803b4 | 6410 | return (highest ? val : Fcons (val, Qnil)); |
4ed46869 | 6411 | } |
4ed46869 | 6412 | |
d46c5b12 KH |
6413 | /* At first, gather possible coding systems in VAL. */ |
6414 | val = Qnil; | |
fa42c37f | 6415 | for (tmp = Vcoding_category_list; CONSP (tmp); tmp = XCDR (tmp)) |
4ed46869 | 6416 | { |
fa42c37f KH |
6417 | Lisp_Object category_val, category_index; |
6418 | ||
6419 | category_index = Fget (XCAR (tmp), Qcoding_category_index); | |
6420 | category_val = Fsymbol_value (XCAR (tmp)); | |
6421 | if (!NILP (category_val) | |
6422 | && NATNUMP (category_index) | |
6423 | && (coding_mask & (1 << XFASTINT (category_index)))) | |
4ed46869 | 6424 | { |
fa42c37f | 6425 | val = Fcons (category_val, val); |
d46c5b12 KH |
6426 | if (highest) |
6427 | break; | |
4ed46869 KH |
6428 | } |
6429 | } | |
d46c5b12 KH |
6430 | if (!highest) |
6431 | val = Fnreverse (val); | |
4ed46869 | 6432 | |
65059037 | 6433 | /* Then, replace the elements with subsidiary coding systems. */ |
fa42c37f | 6434 | for (tmp = val; CONSP (tmp); tmp = XCDR (tmp)) |
4ed46869 | 6435 | { |
65059037 RS |
6436 | if (eol_type != CODING_EOL_UNDECIDED |
6437 | && eol_type != CODING_EOL_INCONSISTENT) | |
4ed46869 | 6438 | { |
d46c5b12 | 6439 | Lisp_Object eol; |
03699b14 | 6440 | eol = Fget (XCAR (tmp), Qeol_type); |
d46c5b12 | 6441 | if (VECTORP (eol)) |
f3fbd155 | 6442 | XSETCAR (tmp, XVECTOR (eol)->contents[eol_type]); |
4ed46869 KH |
6443 | } |
6444 | } | |
03699b14 | 6445 | return (highest ? XCAR (val) : val); |
93dec019 | 6446 | } |
4ed46869 | 6447 | |
d46c5b12 KH |
6448 | DEFUN ("detect-coding-region", Fdetect_coding_region, Sdetect_coding_region, |
6449 | 2, 3, 0, | |
40fd536c KH |
6450 | doc: /* Detect how the byte sequence in the region is encoded. |
6451 | Return a list of possible coding systems used on decoding a byte | |
6452 | sequence containing the bytes in the region between START and END when | |
6453 | the coding system `undecided' is specified. The list is ordered by | |
6454 | priority decided in the current language environment. | |
48b0f3ae PJ |
6455 | |
6456 | If only ASCII characters are found, it returns a list of single element | |
6457 | `undecided' or its subsidiary coding system according to a detected | |
6458 | end-of-line format. | |
6459 | ||
6460 | If optional argument HIGHEST is non-nil, return the coding system of | |
6461 | highest priority. */) | |
6462 | (start, end, highest) | |
d46c5b12 KH |
6463 | Lisp_Object start, end, highest; |
6464 | { | |
6465 | int from, to; | |
6466 | int from_byte, to_byte; | |
682169fe | 6467 | int include_anchor_byte = 0; |
6289dd10 | 6468 | |
b7826503 PJ |
6469 | CHECK_NUMBER_COERCE_MARKER (start); |
6470 | CHECK_NUMBER_COERCE_MARKER (end); | |
4ed46869 | 6471 | |
d46c5b12 KH |
6472 | validate_region (&start, &end); |
6473 | from = XINT (start), to = XINT (end); | |
6474 | from_byte = CHAR_TO_BYTE (from); | |
6475 | to_byte = CHAR_TO_BYTE (to); | |
6289dd10 | 6476 | |
d46c5b12 KH |
6477 | if (from < GPT && to >= GPT) |
6478 | move_gap_both (to, to_byte); | |
c210f766 KH |
6479 | /* If we an anchor byte `\0' follows the region, we include it in |
6480 | the detecting source. Then code detectors can handle the tailing | |
6481 | byte sequence more accurately. | |
6482 | ||
7d0393cf | 6483 | Fix me: This is not a perfect solution. It is better that we |
c210f766 KH |
6484 | add one more argument, say LAST_BLOCK, to all detect_coding_XXX. |
6485 | */ | |
682169fe KH |
6486 | if (to == Z || (to == GPT && GAP_SIZE > 0)) |
6487 | include_anchor_byte = 1; | |
d46c5b12 | 6488 | return detect_coding_system (BYTE_POS_ADDR (from_byte), |
682169fe | 6489 | to_byte - from_byte + include_anchor_byte, |
0a28aafb KH |
6490 | !NILP (highest), |
6491 | !NILP (current_buffer | |
6492 | ->enable_multibyte_characters)); | |
d46c5b12 | 6493 | } |
6289dd10 | 6494 | |
d46c5b12 KH |
6495 | DEFUN ("detect-coding-string", Fdetect_coding_string, Sdetect_coding_string, |
6496 | 1, 2, 0, | |
eec1f3c7 KH |
6497 | doc: /* Detect how the byte sequence in STRING is encoded. |
6498 | Return a list of possible coding systems used on decoding a byte | |
6499 | sequence containing the bytes in STRING when the coding system | |
6500 | `undecided' is specified. The list is ordered by priority decided in | |
6501 | the current language environment. | |
48b0f3ae PJ |
6502 | |
6503 | If only ASCII characters are found, it returns a list of single element | |
6504 | `undecided' or its subsidiary coding system according to a detected | |
6505 | end-of-line format. | |
6506 | ||
6507 | If optional argument HIGHEST is non-nil, return the coding system of | |
6508 | highest priority. */) | |
6509 | (string, highest) | |
d46c5b12 KH |
6510 | Lisp_Object string, highest; |
6511 | { | |
b7826503 | 6512 | CHECK_STRING (string); |
4ed46869 | 6513 | |
d5db4077 | 6514 | return detect_coding_system (SDATA (string), |
682169fe KH |
6515 | /* "+ 1" is to include the anchor byte |
6516 | `\0'. With this, code detectors can | |
c210f766 KH |
6517 | handle the tailing bytes more |
6518 | accurately. */ | |
d5db4077 | 6519 | SBYTES (string) + 1, |
0a28aafb KH |
6520 | !NILP (highest), |
6521 | STRING_MULTIBYTE (string)); | |
4ed46869 KH |
6522 | } |
6523 | ||
05e6f5dc KH |
6524 | /* Subroutine for Fsafe_coding_systems_region_internal. |
6525 | ||
6526 | Return a list of coding systems that safely encode the multibyte | |
b666620c | 6527 | text between P and PEND. SAFE_CODINGS, if non-nil, is an alist of |
05e6f5dc KH |
6528 | possible coding systems. If it is nil, it means that we have not |
6529 | yet found any coding systems. | |
6530 | ||
6531 | WORK_TABLE is a copy of the char-table Vchar_coding_system_table. An | |
6532 | element of WORK_TABLE is set to t once the element is looked up. | |
6533 | ||
6534 | If a non-ASCII single byte char is found, set | |
6535 | *single_byte_char_found to 1. */ | |
6536 | ||
6537 | static Lisp_Object | |
6538 | find_safe_codings (p, pend, safe_codings, work_table, single_byte_char_found) | |
6539 | unsigned char *p, *pend; | |
6540 | Lisp_Object safe_codings, work_table; | |
6541 | int *single_byte_char_found; | |
6b89e3aa | 6542 | { |
f1ce3dcf | 6543 | int c, len; |
6b89e3aa KH |
6544 | Lisp_Object val, ch; |
6545 | Lisp_Object prev, tail; | |
177c0ea7 | 6546 | |
6b89e3aa KH |
6547 | while (p < pend) |
6548 | { | |
6549 | c = STRING_CHAR_AND_LENGTH (p, pend - p, len); | |
6550 | p += len; | |
6551 | if (ASCII_BYTE_P (c)) | |
6552 | /* We can ignore ASCII characters here. */ | |
6553 | continue; | |
6554 | if (SINGLE_BYTE_CHAR_P (c)) | |
6555 | *single_byte_char_found = 1; | |
6556 | if (NILP (safe_codings)) | |
b666620c KH |
6557 | /* Already all coding systems are excluded. But, we can't |
6558 | terminate the loop here because non-ASCII single-byte char | |
6559 | must be found. */ | |
6b89e3aa KH |
6560 | continue; |
6561 | /* Check the safe coding systems for C. */ | |
6562 | ch = make_number (c); | |
6563 | val = Faref (work_table, ch); | |
6564 | if (EQ (val, Qt)) | |
6565 | /* This element was already checked. Ignore it. */ | |
6566 | continue; | |
6567 | /* Remember that we checked this element. */ | |
6568 | Faset (work_table, ch, Qt); | |
6569 | ||
6570 | for (prev = tail = safe_codings; CONSP (tail); tail = XCDR (tail)) | |
6571 | { | |
b666620c KH |
6572 | Lisp_Object elt, translation_table, hash_table, accept_latin_extra; |
6573 | int encodable; | |
6574 | ||
6575 | elt = XCAR (tail); | |
6576 | if (CONSP (XCDR (elt))) | |
6577 | { | |
6578 | /* This entry has this format now: | |
6579 | ( CODING SAFE-CHARS TRANSLATION-TABLE HASH-TABLE | |
6580 | ACCEPT-LATIN-EXTRA ) */ | |
6581 | val = XCDR (elt); | |
6582 | encodable = ! NILP (Faref (XCAR (val), ch)); | |
6583 | if (! encodable) | |
6584 | { | |
6585 | val = XCDR (val); | |
6586 | translation_table = XCAR (val); | |
6587 | hash_table = XCAR (XCDR (val)); | |
6588 | accept_latin_extra = XCAR (XCDR (XCDR (val))); | |
6589 | } | |
6590 | } | |
6591 | else | |
6592 | { | |
6593 | /* This entry has this format now: ( CODING . SAFE-CHARS) */ | |
6594 | encodable = ! NILP (Faref (XCDR (elt), ch)); | |
6595 | if (! encodable) | |
6596 | { | |
6597 | /* Transform the format to: | |
6598 | ( CODING SAFE-CHARS TRANSLATION-TABLE HASH-TABLE | |
6599 | ACCEPT-LATIN-EXTRA ) */ | |
6600 | val = Fget (XCAR (elt), Qcoding_system); | |
6601 | translation_table | |
6602 | = Fplist_get (AREF (val, 3), | |
6603 | Qtranslation_table_for_encode); | |
6604 | if (SYMBOLP (translation_table)) | |
6605 | translation_table = Fget (translation_table, | |
6606 | Qtranslation_table); | |
6607 | hash_table | |
6608 | = (CHAR_TABLE_P (translation_table) | |
6609 | ? XCHAR_TABLE (translation_table)->extras[1] | |
6610 | : Qnil); | |
6611 | accept_latin_extra | |
6612 | = ((EQ (AREF (val, 0), make_number (2)) | |
6613 | && VECTORP (AREF (val, 4))) | |
58f99379 | 6614 | ? AREF (AREF (val, 4), 16) |
b666620c KH |
6615 | : Qnil); |
6616 | XSETCAR (tail, list5 (XCAR (elt), XCDR (elt), | |
6617 | translation_table, hash_table, | |
6618 | accept_latin_extra)); | |
6619 | } | |
6620 | } | |
6621 | ||
6622 | if (! encodable | |
6623 | && ((CHAR_TABLE_P (translation_table) | |
6624 | && ! NILP (Faref (translation_table, ch))) | |
6625 | || (HASH_TABLE_P (hash_table) | |
6626 | && ! NILP (Fgethash (ch, hash_table, Qnil))) | |
6627 | || (SINGLE_BYTE_CHAR_P (c) | |
6628 | && ! NILP (accept_latin_extra) | |
6629 | && VECTORP (Vlatin_extra_code_table) | |
6630 | && ! NILP (AREF (Vlatin_extra_code_table, c))))) | |
6631 | encodable = 1; | |
6632 | if (encodable) | |
6633 | prev = tail; | |
6634 | else | |
6b89e3aa | 6635 | { |
7c695ab9 | 6636 | /* Exclude this coding system from SAFE_CODINGS. */ |
6b89e3aa KH |
6637 | if (EQ (tail, safe_codings)) |
6638 | safe_codings = XCDR (safe_codings); | |
6639 | else | |
6640 | XSETCDR (prev, XCDR (tail)); | |
6641 | } | |
6b89e3aa KH |
6642 | } |
6643 | } | |
6644 | return safe_codings; | |
6645 | } | |
6646 | ||
067a6a66 KH |
6647 | DEFUN ("find-coding-systems-region-internal", |
6648 | Ffind_coding_systems_region_internal, | |
6649 | Sfind_coding_systems_region_internal, 2, 2, 0, | |
6b89e3aa KH |
6650 | doc: /* Internal use only. */) |
6651 | (start, end) | |
6652 | Lisp_Object start, end; | |
6653 | { | |
6654 | Lisp_Object work_table, safe_codings; | |
6655 | int non_ascii_p = 0; | |
6656 | int single_byte_char_found = 0; | |
6657 | const unsigned char *p1, *p1end, *p2, *p2end, *p; | |
6658 | ||
6659 | if (STRINGP (start)) | |
6660 | { | |
6661 | if (!STRING_MULTIBYTE (start)) | |
6662 | return Qt; | |
6663 | p1 = SDATA (start), p1end = p1 + SBYTES (start); | |
6664 | p2 = p2end = p1end; | |
6665 | if (SCHARS (start) != SBYTES (start)) | |
6666 | non_ascii_p = 1; | |
6667 | } | |
6668 | else | |
6669 | { | |
6670 | int from, to, stop; | |
6671 | ||
6672 | CHECK_NUMBER_COERCE_MARKER (start); | |
6673 | CHECK_NUMBER_COERCE_MARKER (end); | |
6674 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) | |
6675 | args_out_of_range (start, end); | |
6676 | if (NILP (current_buffer->enable_multibyte_characters)) | |
6677 | return Qt; | |
6678 | from = CHAR_TO_BYTE (XINT (start)); | |
6679 | to = CHAR_TO_BYTE (XINT (end)); | |
6680 | stop = from < GPT_BYTE && GPT_BYTE < to ? GPT_BYTE : to; | |
6681 | p1 = BYTE_POS_ADDR (from), p1end = p1 + (stop - from); | |
6682 | if (stop == to) | |
6683 | p2 = p2end = p1end; | |
6684 | else | |
6685 | p2 = BYTE_POS_ADDR (stop), p2end = p2 + (to - stop); | |
6686 | if (XINT (end) - XINT (start) != to - from) | |
6687 | non_ascii_p = 1; | |
6688 | } | |
6689 | ||
6690 | if (!non_ascii_p) | |
6691 | { | |
6692 | /* We are sure that the text contains no multibyte character. | |
6693 | Check if it contains eight-bit-graphic. */ | |
6694 | p = p1; | |
6695 | for (p = p1; p < p1end && ASCII_BYTE_P (*p); p++); | |
6696 | if (p == p1end) | |
6697 | { | |
6698 | for (p = p2; p < p2end && ASCII_BYTE_P (*p); p++); | |
6699 | if (p == p2end) | |
6700 | return Qt; | |
6701 | } | |
6702 | } | |
6703 | ||
6704 | /* The text contains non-ASCII characters. */ | |
6705 | ||
6706 | work_table = Fmake_char_table (Qchar_coding_system, Qnil); | |
6707 | safe_codings = Fcopy_sequence (XCDR (Vcoding_system_safe_chars)); | |
6708 | ||
067a6a66 KH |
6709 | safe_codings = find_safe_codings (p1, p1end, safe_codings, work_table, |
6710 | &single_byte_char_found); | |
6b89e3aa | 6711 | if (p2 < p2end) |
067a6a66 KH |
6712 | safe_codings = find_safe_codings (p2, p2end, safe_codings, work_table, |
6713 | &single_byte_char_found); | |
6b89e3aa KH |
6714 | if (EQ (safe_codings, XCDR (Vcoding_system_safe_chars))) |
6715 | safe_codings = Qt; | |
6716 | else | |
6717 | { | |
6718 | /* Turn safe_codings to a list of coding systems... */ | |
6719 | Lisp_Object val; | |
6720 | ||
6721 | if (single_byte_char_found) | |
6722 | /* ... and append these for eight-bit chars. */ | |
6723 | val = Fcons (Qraw_text, | |
6724 | Fcons (Qemacs_mule, Fcons (Qno_conversion, Qnil))); | |
6725 | else | |
6726 | /* ... and append generic coding systems. */ | |
6727 | val = Fcopy_sequence (XCAR (Vcoding_system_safe_chars)); | |
177c0ea7 | 6728 | |
6b89e3aa KH |
6729 | for (; CONSP (safe_codings); safe_codings = XCDR (safe_codings)) |
6730 | val = Fcons (XCAR (XCAR (safe_codings)), val); | |
6731 | safe_codings = val; | |
6732 | } | |
6733 | ||
6734 | return safe_codings; | |
6735 | } | |
6736 | ||
6737 | ||
068a9dbd KH |
6738 | /* Search from position POS for such characters that are unencodable |
6739 | accoding to SAFE_CHARS, and return a list of their positions. P | |
6740 | points where in the memory the character at POS exists. Limit the | |
6741 | search at PEND or when Nth unencodable characters are found. | |
6742 | ||
6743 | If SAFE_CHARS is a char table, an element for an unencodable | |
6744 | character is nil. | |
6745 | ||
6746 | If SAFE_CHARS is nil, all non-ASCII characters are unencodable. | |
6747 | ||
6748 | Otherwise, SAFE_CHARS is t, and only eight-bit-contrl and | |
6749 | eight-bit-graphic characters are unencodable. */ | |
6750 | ||
6751 | static Lisp_Object | |
6752 | unencodable_char_position (safe_chars, pos, p, pend, n) | |
6753 | Lisp_Object safe_chars; | |
6754 | int pos; | |
6755 | unsigned char *p, *pend; | |
6756 | int n; | |
6757 | { | |
6758 | Lisp_Object pos_list; | |
6759 | ||
6760 | pos_list = Qnil; | |
6761 | while (p < pend) | |
6762 | { | |
6763 | int len; | |
6764 | int c = STRING_CHAR_AND_LENGTH (p, MAX_MULTIBYTE_LENGTH, len); | |
7d0393cf | 6765 | |
068a9dbd KH |
6766 | if (c >= 128 |
6767 | && (CHAR_TABLE_P (safe_chars) | |
6768 | ? NILP (CHAR_TABLE_REF (safe_chars, c)) | |
6769 | : (NILP (safe_chars) || c < 256))) | |
6770 | { | |
6771 | pos_list = Fcons (make_number (pos), pos_list); | |
6772 | if (--n <= 0) | |
6773 | break; | |
6774 | } | |
6775 | pos++; | |
6776 | p += len; | |
6777 | } | |
6778 | return Fnreverse (pos_list); | |
6779 | } | |
6780 | ||
6781 | ||
6782 | DEFUN ("unencodable-char-position", Funencodable_char_position, | |
6783 | Sunencodable_char_position, 3, 5, 0, | |
6784 | doc: /* | |
6785 | Return position of first un-encodable character in a region. | |
6786 | START and END specfiy the region and CODING-SYSTEM specifies the | |
6787 | encoding to check. Return nil if CODING-SYSTEM does encode the region. | |
6788 | ||
6789 | If optional 4th argument COUNT is non-nil, it specifies at most how | |
6790 | many un-encodable characters to search. In this case, the value is a | |
6791 | list of positions. | |
6792 | ||
6793 | If optional 5th argument STRING is non-nil, it is a string to search | |
6794 | for un-encodable characters. In that case, START and END are indexes | |
6795 | to the string. */) | |
6796 | (start, end, coding_system, count, string) | |
6797 | Lisp_Object start, end, coding_system, count, string; | |
6798 | { | |
6799 | int n; | |
6800 | Lisp_Object safe_chars; | |
6801 | struct coding_system coding; | |
6802 | Lisp_Object positions; | |
6803 | int from, to; | |
6804 | unsigned char *p, *pend; | |
6805 | ||
6806 | if (NILP (string)) | |
6807 | { | |
6808 | validate_region (&start, &end); | |
6809 | from = XINT (start); | |
6810 | to = XINT (end); | |
6811 | if (NILP (current_buffer->enable_multibyte_characters)) | |
6812 | return Qnil; | |
6813 | p = CHAR_POS_ADDR (from); | |
200c93e2 KH |
6814 | if (to == GPT) |
6815 | pend = GPT_ADDR; | |
6816 | else | |
6817 | pend = CHAR_POS_ADDR (to); | |
068a9dbd KH |
6818 | } |
6819 | else | |
6820 | { | |
6821 | CHECK_STRING (string); | |
6822 | CHECK_NATNUM (start); | |
6823 | CHECK_NATNUM (end); | |
6824 | from = XINT (start); | |
6825 | to = XINT (end); | |
6826 | if (from > to | |
6827 | || to > SCHARS (string)) | |
6828 | args_out_of_range_3 (string, start, end); | |
6829 | if (! STRING_MULTIBYTE (string)) | |
6830 | return Qnil; | |
6831 | p = SDATA (string) + string_char_to_byte (string, from); | |
6832 | pend = SDATA (string) + string_char_to_byte (string, to); | |
6833 | } | |
6834 | ||
6835 | setup_coding_system (Fcheck_coding_system (coding_system), &coding); | |
6836 | ||
6837 | if (NILP (count)) | |
6838 | n = 1; | |
6839 | else | |
6840 | { | |
6841 | CHECK_NATNUM (count); | |
6842 | n = XINT (count); | |
6843 | } | |
6844 | ||
6845 | if (coding.type == coding_type_no_conversion | |
6846 | || coding.type == coding_type_raw_text) | |
6847 | return Qnil; | |
6848 | ||
6849 | if (coding.type == coding_type_undecided) | |
6850 | safe_chars = Qnil; | |
6851 | else | |
6b89e3aa | 6852 | safe_chars = coding_safe_chars (coding_system); |
068a9dbd KH |
6853 | |
6854 | if (STRINGP (string) | |
6855 | || from >= GPT || to <= GPT) | |
6856 | positions = unencodable_char_position (safe_chars, from, p, pend, n); | |
6857 | else | |
6858 | { | |
6859 | Lisp_Object args[2]; | |
6860 | ||
6861 | args[0] = unencodable_char_position (safe_chars, from, p, GPT_ADDR, n); | |
96d2e64d | 6862 | n -= XINT (Flength (args[0])); |
068a9dbd KH |
6863 | if (n <= 0) |
6864 | positions = args[0]; | |
6865 | else | |
6866 | { | |
6867 | args[1] = unencodable_char_position (safe_chars, GPT, GAP_END_ADDR, | |
6868 | pend, n); | |
6869 | positions = Fappend (2, args); | |
6870 | } | |
6871 | } | |
6872 | ||
6873 | return (NILP (count) ? Fcar (positions) : positions); | |
6874 | } | |
6875 | ||
6876 | ||
4031e2bf KH |
6877 | Lisp_Object |
6878 | code_convert_region1 (start, end, coding_system, encodep) | |
d46c5b12 | 6879 | Lisp_Object start, end, coding_system; |
4031e2bf | 6880 | int encodep; |
3a73fa5d RS |
6881 | { |
6882 | struct coding_system coding; | |
da55a2b7 | 6883 | int from, to; |
3a73fa5d | 6884 | |
b7826503 PJ |
6885 | CHECK_NUMBER_COERCE_MARKER (start); |
6886 | CHECK_NUMBER_COERCE_MARKER (end); | |
6887 | CHECK_SYMBOL (coding_system); | |
3a73fa5d | 6888 | |
d46c5b12 KH |
6889 | validate_region (&start, &end); |
6890 | from = XFASTINT (start); | |
6891 | to = XFASTINT (end); | |
6892 | ||
3a73fa5d | 6893 | if (NILP (coding_system)) |
d46c5b12 KH |
6894 | return make_number (to - from); |
6895 | ||
3a73fa5d | 6896 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) |
d5db4077 | 6897 | error ("Invalid coding system: %s", SDATA (SYMBOL_NAME (coding_system))); |
3a73fa5d | 6898 | |
d46c5b12 | 6899 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
6900 | coding.src_multibyte = coding.dst_multibyte |
6901 | = !NILP (current_buffer->enable_multibyte_characters); | |
fb88bf2d KH |
6902 | code_convert_region (from, CHAR_TO_BYTE (from), to, CHAR_TO_BYTE (to), |
6903 | &coding, encodep, 1); | |
f072a3e8 | 6904 | Vlast_coding_system_used = coding.symbol; |
fb88bf2d | 6905 | return make_number (coding.produced_char); |
4031e2bf KH |
6906 | } |
6907 | ||
6908 | DEFUN ("decode-coding-region", Fdecode_coding_region, Sdecode_coding_region, | |
6909 | 3, 3, "r\nzCoding system: ", | |
48b0f3ae PJ |
6910 | doc: /* Decode the current region from the specified coding system. |
6911 | When called from a program, takes three arguments: | |
6912 | START, END, and CODING-SYSTEM. START and END are buffer positions. | |
6913 | This function sets `last-coding-system-used' to the precise coding system | |
6914 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6915 | not fully specified.) | |
6916 | It returns the length of the decoded text. */) | |
6917 | (start, end, coding_system) | |
4031e2bf KH |
6918 | Lisp_Object start, end, coding_system; |
6919 | { | |
6920 | return code_convert_region1 (start, end, coding_system, 0); | |
3a73fa5d RS |
6921 | } |
6922 | ||
6923 | DEFUN ("encode-coding-region", Fencode_coding_region, Sencode_coding_region, | |
6924 | 3, 3, "r\nzCoding system: ", | |
48b0f3ae PJ |
6925 | doc: /* Encode the current region into the specified coding system. |
6926 | When called from a program, takes three arguments: | |
6927 | START, END, and CODING-SYSTEM. START and END are buffer positions. | |
6928 | This function sets `last-coding-system-used' to the precise coding system | |
6929 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6930 | not fully specified.) | |
6931 | It returns the length of the encoded text. */) | |
6932 | (start, end, coding_system) | |
d46c5b12 | 6933 | Lisp_Object start, end, coding_system; |
3a73fa5d | 6934 | { |
4031e2bf KH |
6935 | return code_convert_region1 (start, end, coding_system, 1); |
6936 | } | |
3a73fa5d | 6937 | |
4031e2bf KH |
6938 | Lisp_Object |
6939 | code_convert_string1 (string, coding_system, nocopy, encodep) | |
6940 | Lisp_Object string, coding_system, nocopy; | |
6941 | int encodep; | |
6942 | { | |
6943 | struct coding_system coding; | |
3a73fa5d | 6944 | |
b7826503 PJ |
6945 | CHECK_STRING (string); |
6946 | CHECK_SYMBOL (coding_system); | |
4ed46869 | 6947 | |
d46c5b12 | 6948 | if (NILP (coding_system)) |
4031e2bf | 6949 | return (NILP (nocopy) ? Fcopy_sequence (string) : string); |
4ed46869 | 6950 | |
d46c5b12 | 6951 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) |
d5db4077 | 6952 | error ("Invalid coding system: %s", SDATA (SYMBOL_NAME (coding_system))); |
5f1cd180 | 6953 | |
d46c5b12 | 6954 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
6955 | string = (encodep |
6956 | ? encode_coding_string (string, &coding, !NILP (nocopy)) | |
6957 | : decode_coding_string (string, &coding, !NILP (nocopy))); | |
f072a3e8 | 6958 | Vlast_coding_system_used = coding.symbol; |
ec6d2bb8 KH |
6959 | |
6960 | return string; | |
4ed46869 KH |
6961 | } |
6962 | ||
4ed46869 | 6963 | DEFUN ("decode-coding-string", Fdecode_coding_string, Sdecode_coding_string, |
e0e989f6 | 6964 | 2, 3, 0, |
48b0f3ae PJ |
6965 | doc: /* Decode STRING which is encoded in CODING-SYSTEM, and return the result. |
6966 | Optional arg NOCOPY non-nil means it is OK to return STRING itself | |
6967 | if the decoding operation is trivial. | |
6968 | This function sets `last-coding-system-used' to the precise coding system | |
6969 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6970 | not fully specified.) */) | |
6971 | (string, coding_system, nocopy) | |
e0e989f6 | 6972 | Lisp_Object string, coding_system, nocopy; |
4ed46869 | 6973 | { |
f072a3e8 | 6974 | return code_convert_string1 (string, coding_system, nocopy, 0); |
4ed46869 KH |
6975 | } |
6976 | ||
6977 | DEFUN ("encode-coding-string", Fencode_coding_string, Sencode_coding_string, | |
e0e989f6 | 6978 | 2, 3, 0, |
48b0f3ae PJ |
6979 | doc: /* Encode STRING to CODING-SYSTEM, and return the result. |
6980 | Optional arg NOCOPY non-nil means it is OK to return STRING itself | |
6981 | if the encoding operation is trivial. | |
6982 | This function sets `last-coding-system-used' to the precise coding system | |
6983 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6984 | not fully specified.) */) | |
6985 | (string, coding_system, nocopy) | |
e0e989f6 | 6986 | Lisp_Object string, coding_system, nocopy; |
4ed46869 | 6987 | { |
f072a3e8 | 6988 | return code_convert_string1 (string, coding_system, nocopy, 1); |
4ed46869 | 6989 | } |
4031e2bf | 6990 | |
ecec61c1 | 6991 | /* Encode or decode STRING according to CODING_SYSTEM. |
ec6d2bb8 KH |
6992 | Do not set Vlast_coding_system_used. |
6993 | ||
6994 | This function is called only from macros DECODE_FILE and | |
6995 | ENCODE_FILE, thus we ignore character composition. */ | |
ecec61c1 KH |
6996 | |
6997 | Lisp_Object | |
6998 | code_convert_string_norecord (string, coding_system, encodep) | |
6999 | Lisp_Object string, coding_system; | |
7000 | int encodep; | |
7001 | { | |
7002 | struct coding_system coding; | |
7003 | ||
b7826503 PJ |
7004 | CHECK_STRING (string); |
7005 | CHECK_SYMBOL (coding_system); | |
ecec61c1 KH |
7006 | |
7007 | if (NILP (coding_system)) | |
7008 | return string; | |
7009 | ||
7010 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) | |
d5db4077 | 7011 | error ("Invalid coding system: %s", SDATA (SYMBOL_NAME (coding_system))); |
ecec61c1 | 7012 | |
ec6d2bb8 | 7013 | coding.composing = COMPOSITION_DISABLED; |
ecec61c1 | 7014 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
7015 | return (encodep |
7016 | ? encode_coding_string (string, &coding, 1) | |
7017 | : decode_coding_string (string, &coding, 1)); | |
ecec61c1 | 7018 | } |
3a73fa5d | 7019 | \f |
4ed46869 | 7020 | DEFUN ("decode-sjis-char", Fdecode_sjis_char, Sdecode_sjis_char, 1, 1, 0, |
48b0f3ae PJ |
7021 | doc: /* Decode a Japanese character which has CODE in shift_jis encoding. |
7022 | Return the corresponding character. */) | |
7023 | (code) | |
4ed46869 KH |
7024 | Lisp_Object code; |
7025 | { | |
7026 | unsigned char c1, c2, s1, s2; | |
7027 | Lisp_Object val; | |
7028 | ||
b7826503 | 7029 | CHECK_NUMBER (code); |
4ed46869 | 7030 | s1 = (XFASTINT (code)) >> 8, s2 = (XFASTINT (code)) & 0xFF; |
55ab7be3 KH |
7031 | if (s1 == 0) |
7032 | { | |
c28a9453 KH |
7033 | if (s2 < 0x80) |
7034 | XSETFASTINT (val, s2); | |
7035 | else if (s2 >= 0xA0 || s2 <= 0xDF) | |
b73bfc1c | 7036 | XSETFASTINT (val, MAKE_CHAR (charset_katakana_jisx0201, s2, 0)); |
c28a9453 | 7037 | else |
9da8350f | 7038 | error ("Invalid Shift JIS code: %x", XFASTINT (code)); |
55ab7be3 KH |
7039 | } |
7040 | else | |
7041 | { | |
87323294 | 7042 | if ((s1 < 0x80 || (s1 > 0x9F && s1 < 0xE0) || s1 > 0xEF) |
55ab7be3 | 7043 | || (s2 < 0x40 || s2 == 0x7F || s2 > 0xFC)) |
9da8350f | 7044 | error ("Invalid Shift JIS code: %x", XFASTINT (code)); |
55ab7be3 | 7045 | DECODE_SJIS (s1, s2, c1, c2); |
b73bfc1c | 7046 | XSETFASTINT (val, MAKE_CHAR (charset_jisx0208, c1, c2)); |
55ab7be3 | 7047 | } |
4ed46869 KH |
7048 | return val; |
7049 | } | |
7050 | ||
7051 | DEFUN ("encode-sjis-char", Fencode_sjis_char, Sencode_sjis_char, 1, 1, 0, | |
48b0f3ae PJ |
7052 | doc: /* Encode a Japanese character CHAR to shift_jis encoding. |
7053 | Return the corresponding code in SJIS. */) | |
7054 | (ch) | |
4ed46869 KH |
7055 | Lisp_Object ch; |
7056 | { | |
bcf26d6a | 7057 | int charset, c1, c2, s1, s2; |
4ed46869 KH |
7058 | Lisp_Object val; |
7059 | ||
b7826503 | 7060 | CHECK_NUMBER (ch); |
4ed46869 | 7061 | SPLIT_CHAR (XFASTINT (ch), charset, c1, c2); |
c28a9453 KH |
7062 | if (charset == CHARSET_ASCII) |
7063 | { | |
7064 | val = ch; | |
7065 | } | |
7066 | else if (charset == charset_jisx0208 | |
7067 | && c1 > 0x20 && c1 < 0x7F && c2 > 0x20 && c2 < 0x7F) | |
4ed46869 KH |
7068 | { |
7069 | ENCODE_SJIS (c1, c2, s1, s2); | |
bcf26d6a | 7070 | XSETFASTINT (val, (s1 << 8) | s2); |
4ed46869 | 7071 | } |
55ab7be3 KH |
7072 | else if (charset == charset_katakana_jisx0201 |
7073 | && c1 > 0x20 && c2 < 0xE0) | |
7074 | { | |
7075 | XSETFASTINT (val, c1 | 0x80); | |
7076 | } | |
4ed46869 | 7077 | else |
55ab7be3 | 7078 | error ("Can't encode to shift_jis: %d", XFASTINT (ch)); |
4ed46869 KH |
7079 | return val; |
7080 | } | |
7081 | ||
7082 | DEFUN ("decode-big5-char", Fdecode_big5_char, Sdecode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
7083 | doc: /* Decode a Big5 character which has CODE in BIG5 coding system. |
7084 | Return the corresponding character. */) | |
7085 | (code) | |
4ed46869 KH |
7086 | Lisp_Object code; |
7087 | { | |
7088 | int charset; | |
7089 | unsigned char b1, b2, c1, c2; | |
7090 | Lisp_Object val; | |
7091 | ||
b7826503 | 7092 | CHECK_NUMBER (code); |
4ed46869 | 7093 | b1 = (XFASTINT (code)) >> 8, b2 = (XFASTINT (code)) & 0xFF; |
c28a9453 KH |
7094 | if (b1 == 0) |
7095 | { | |
7096 | if (b2 >= 0x80) | |
9da8350f | 7097 | error ("Invalid BIG5 code: %x", XFASTINT (code)); |
c28a9453 KH |
7098 | val = code; |
7099 | } | |
7100 | else | |
7101 | { | |
7102 | if ((b1 < 0xA1 || b1 > 0xFE) | |
7103 | || (b2 < 0x40 || (b2 > 0x7E && b2 < 0xA1) || b2 > 0xFE)) | |
9da8350f | 7104 | error ("Invalid BIG5 code: %x", XFASTINT (code)); |
c28a9453 | 7105 | DECODE_BIG5 (b1, b2, charset, c1, c2); |
b73bfc1c | 7106 | XSETFASTINT (val, MAKE_CHAR (charset, c1, c2)); |
c28a9453 | 7107 | } |
4ed46869 KH |
7108 | return val; |
7109 | } | |
7110 | ||
7111 | DEFUN ("encode-big5-char", Fencode_big5_char, Sencode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
7112 | doc: /* Encode the Big5 character CHAR to BIG5 coding system. |
7113 | Return the corresponding character code in Big5. */) | |
7114 | (ch) | |
4ed46869 KH |
7115 | Lisp_Object ch; |
7116 | { | |
bcf26d6a | 7117 | int charset, c1, c2, b1, b2; |
4ed46869 KH |
7118 | Lisp_Object val; |
7119 | ||
b7826503 | 7120 | CHECK_NUMBER (ch); |
4ed46869 | 7121 | SPLIT_CHAR (XFASTINT (ch), charset, c1, c2); |
c28a9453 KH |
7122 | if (charset == CHARSET_ASCII) |
7123 | { | |
7124 | val = ch; | |
7125 | } | |
7126 | else if ((charset == charset_big5_1 | |
7127 | && (XFASTINT (ch) >= 0x250a1 && XFASTINT (ch) <= 0x271ec)) | |
7128 | || (charset == charset_big5_2 | |
7129 | && XFASTINT (ch) >= 0x290a1 && XFASTINT (ch) <= 0x2bdb2)) | |
4ed46869 KH |
7130 | { |
7131 | ENCODE_BIG5 (charset, c1, c2, b1, b2); | |
bcf26d6a | 7132 | XSETFASTINT (val, (b1 << 8) | b2); |
4ed46869 KH |
7133 | } |
7134 | else | |
c28a9453 | 7135 | error ("Can't encode to Big5: %d", XFASTINT (ch)); |
4ed46869 KH |
7136 | return val; |
7137 | } | |
3a73fa5d | 7138 | \f |
002fdb44 | 7139 | DEFUN ("set-terminal-coding-system-internal", Fset_terminal_coding_system_internal, |
48b0f3ae PJ |
7140 | Sset_terminal_coding_system_internal, 1, 1, 0, |
7141 | doc: /* Internal use only. */) | |
7142 | (coding_system) | |
4ed46869 KH |
7143 | Lisp_Object coding_system; |
7144 | { | |
b7826503 | 7145 | CHECK_SYMBOL (coding_system); |
4ed46869 | 7146 | setup_coding_system (Fcheck_coding_system (coding_system), &terminal_coding); |
70c22245 | 7147 | /* We had better not send unsafe characters to terminal. */ |
0eecad43 | 7148 | terminal_coding.mode |= CODING_MODE_INHIBIT_UNENCODABLE_CHAR; |
8ca3766a | 7149 | /* Character composition should be disabled. */ |
ec6d2bb8 | 7150 | terminal_coding.composing = COMPOSITION_DISABLED; |
bd64290d KH |
7151 | /* Error notification should be suppressed. */ |
7152 | terminal_coding.suppress_error = 1; | |
b73bfc1c KH |
7153 | terminal_coding.src_multibyte = 1; |
7154 | terminal_coding.dst_multibyte = 0; | |
4ed46869 KH |
7155 | return Qnil; |
7156 | } | |
7157 | ||
002fdb44 | 7158 | DEFUN ("set-safe-terminal-coding-system-internal", Fset_safe_terminal_coding_system_internal, |
48b0f3ae | 7159 | Sset_safe_terminal_coding_system_internal, 1, 1, 0, |
ddb67bdc | 7160 | doc: /* Internal use only. */) |
48b0f3ae | 7161 | (coding_system) |
c4825358 KH |
7162 | Lisp_Object coding_system; |
7163 | { | |
b7826503 | 7164 | CHECK_SYMBOL (coding_system); |
c4825358 KH |
7165 | setup_coding_system (Fcheck_coding_system (coding_system), |
7166 | &safe_terminal_coding); | |
8ca3766a | 7167 | /* Character composition should be disabled. */ |
ec6d2bb8 | 7168 | safe_terminal_coding.composing = COMPOSITION_DISABLED; |
bd64290d KH |
7169 | /* Error notification should be suppressed. */ |
7170 | terminal_coding.suppress_error = 1; | |
b73bfc1c KH |
7171 | safe_terminal_coding.src_multibyte = 1; |
7172 | safe_terminal_coding.dst_multibyte = 0; | |
c4825358 KH |
7173 | return Qnil; |
7174 | } | |
7175 | ||
002fdb44 DL |
7176 | DEFUN ("terminal-coding-system", Fterminal_coding_system, |
7177 | Sterminal_coding_system, 0, 0, 0, | |
48b0f3ae PJ |
7178 | doc: /* Return coding system specified for terminal output. */) |
7179 | () | |
4ed46869 KH |
7180 | { |
7181 | return terminal_coding.symbol; | |
7182 | } | |
7183 | ||
002fdb44 | 7184 | DEFUN ("set-keyboard-coding-system-internal", Fset_keyboard_coding_system_internal, |
48b0f3ae PJ |
7185 | Sset_keyboard_coding_system_internal, 1, 1, 0, |
7186 | doc: /* Internal use only. */) | |
7187 | (coding_system) | |
4ed46869 KH |
7188 | Lisp_Object coding_system; |
7189 | { | |
b7826503 | 7190 | CHECK_SYMBOL (coding_system); |
4ed46869 | 7191 | setup_coding_system (Fcheck_coding_system (coding_system), &keyboard_coding); |
8ca3766a | 7192 | /* Character composition should be disabled. */ |
ec6d2bb8 | 7193 | keyboard_coding.composing = COMPOSITION_DISABLED; |
4ed46869 KH |
7194 | return Qnil; |
7195 | } | |
7196 | ||
002fdb44 DL |
7197 | DEFUN ("keyboard-coding-system", Fkeyboard_coding_system, |
7198 | Skeyboard_coding_system, 0, 0, 0, | |
48b0f3ae PJ |
7199 | doc: /* Return coding system specified for decoding keyboard input. */) |
7200 | () | |
4ed46869 KH |
7201 | { |
7202 | return keyboard_coding.symbol; | |
7203 | } | |
7204 | ||
7205 | \f | |
a5d301df KH |
7206 | DEFUN ("find-operation-coding-system", Ffind_operation_coding_system, |
7207 | Sfind_operation_coding_system, 1, MANY, 0, | |
48b0f3ae PJ |
7208 | doc: /* Choose a coding system for an operation based on the target name. |
7209 | The value names a pair of coding systems: (DECODING-SYSTEM . ENCODING-SYSTEM). | |
7210 | DECODING-SYSTEM is the coding system to use for decoding | |
7211 | \(in case OPERATION does decoding), and ENCODING-SYSTEM is the coding system | |
7212 | for encoding (in case OPERATION does encoding). | |
7213 | ||
7214 | The first argument OPERATION specifies an I/O primitive: | |
7215 | For file I/O, `insert-file-contents' or `write-region'. | |
7216 | For process I/O, `call-process', `call-process-region', or `start-process'. | |
7217 | For network I/O, `open-network-stream'. | |
7218 | ||
7219 | The remaining arguments should be the same arguments that were passed | |
7220 | to the primitive. Depending on which primitive, one of those arguments | |
7221 | is selected as the TARGET. For example, if OPERATION does file I/O, | |
7222 | whichever argument specifies the file name is TARGET. | |
7223 | ||
7224 | TARGET has a meaning which depends on OPERATION: | |
7225 | For file I/O, TARGET is a file name. | |
7226 | For process I/O, TARGET is a process name. | |
7227 | For network I/O, TARGET is a service name or a port number | |
7228 | ||
7229 | This function looks up what specified for TARGET in, | |
7230 | `file-coding-system-alist', `process-coding-system-alist', | |
7231 | or `network-coding-system-alist' depending on OPERATION. | |
7232 | They may specify a coding system, a cons of coding systems, | |
7233 | or a function symbol to call. | |
7234 | In the last case, we call the function with one argument, | |
7235 | which is a list of all the arguments given to this function. | |
7236 | ||
7237 | usage: (find-operation-coding-system OPERATION ARGUMENTS ...) */) | |
7238 | (nargs, args) | |
4ed46869 KH |
7239 | int nargs; |
7240 | Lisp_Object *args; | |
7241 | { | |
7242 | Lisp_Object operation, target_idx, target, val; | |
7243 | register Lisp_Object chain; | |
7244 | ||
7245 | if (nargs < 2) | |
7246 | error ("Too few arguments"); | |
7247 | operation = args[0]; | |
7248 | if (!SYMBOLP (operation) | |
7249 | || !INTEGERP (target_idx = Fget (operation, Qtarget_idx))) | |
8ca3766a | 7250 | error ("Invalid first argument"); |
4ed46869 KH |
7251 | if (nargs < 1 + XINT (target_idx)) |
7252 | error ("Too few arguments for operation: %s", | |
d5db4077 | 7253 | SDATA (SYMBOL_NAME (operation))); |
7f787cfd KH |
7254 | /* For write-region, if the 6th argument (i.e. VISIT, the 5th |
7255 | argument to write-region) is string, it must be treated as a | |
7256 | target file name. */ | |
7257 | if (EQ (operation, Qwrite_region) | |
7258 | && nargs > 5 | |
7259 | && STRINGP (args[5])) | |
d90ed3b4 | 7260 | target_idx = make_number (4); |
4ed46869 KH |
7261 | target = args[XINT (target_idx) + 1]; |
7262 | if (!(STRINGP (target) | |
7263 | || (EQ (operation, Qopen_network_stream) && INTEGERP (target)))) | |
8ca3766a | 7264 | error ("Invalid argument %d", XINT (target_idx) + 1); |
4ed46869 | 7265 | |
2e34157c RS |
7266 | chain = ((EQ (operation, Qinsert_file_contents) |
7267 | || EQ (operation, Qwrite_region)) | |
02ba4723 | 7268 | ? Vfile_coding_system_alist |
2e34157c | 7269 | : (EQ (operation, Qopen_network_stream) |
02ba4723 KH |
7270 | ? Vnetwork_coding_system_alist |
7271 | : Vprocess_coding_system_alist)); | |
4ed46869 KH |
7272 | if (NILP (chain)) |
7273 | return Qnil; | |
7274 | ||
03699b14 | 7275 | for (; CONSP (chain); chain = XCDR (chain)) |
4ed46869 | 7276 | { |
f44d27ce | 7277 | Lisp_Object elt; |
03699b14 | 7278 | elt = XCAR (chain); |
4ed46869 KH |
7279 | |
7280 | if (CONSP (elt) | |
7281 | && ((STRINGP (target) | |
03699b14 KR |
7282 | && STRINGP (XCAR (elt)) |
7283 | && fast_string_match (XCAR (elt), target) >= 0) | |
7284 | || (INTEGERP (target) && EQ (target, XCAR (elt))))) | |
02ba4723 | 7285 | { |
03699b14 | 7286 | val = XCDR (elt); |
b19fd4c5 KH |
7287 | /* Here, if VAL is both a valid coding system and a valid |
7288 | function symbol, we return VAL as a coding system. */ | |
02ba4723 KH |
7289 | if (CONSP (val)) |
7290 | return val; | |
7291 | if (! SYMBOLP (val)) | |
7292 | return Qnil; | |
7293 | if (! NILP (Fcoding_system_p (val))) | |
7294 | return Fcons (val, val); | |
b19fd4c5 KH |
7295 | if (! NILP (Ffboundp (val))) |
7296 | { | |
7297 | val = call1 (val, Flist (nargs, args)); | |
7298 | if (CONSP (val)) | |
7299 | return val; | |
7300 | if (SYMBOLP (val) && ! NILP (Fcoding_system_p (val))) | |
7301 | return Fcons (val, val); | |
7302 | } | |
02ba4723 KH |
7303 | return Qnil; |
7304 | } | |
4ed46869 KH |
7305 | } |
7306 | return Qnil; | |
7307 | } | |
7308 | ||
1397dc18 KH |
7309 | DEFUN ("update-coding-systems-internal", Fupdate_coding_systems_internal, |
7310 | Supdate_coding_systems_internal, 0, 0, 0, | |
48b0f3ae PJ |
7311 | doc: /* Update internal database for ISO2022 and CCL based coding systems. |
7312 | When values of any coding categories are changed, you must | |
7313 | call this function. */) | |
7314 | () | |
d46c5b12 KH |
7315 | { |
7316 | int i; | |
7317 | ||
fa42c37f | 7318 | for (i = CODING_CATEGORY_IDX_EMACS_MULE; i < CODING_CATEGORY_IDX_MAX; i++) |
d46c5b12 | 7319 | { |
1397dc18 KH |
7320 | Lisp_Object val; |
7321 | ||
f5c1dd0d | 7322 | val = SYMBOL_VALUE (XVECTOR (Vcoding_category_table)->contents[i]); |
1397dc18 KH |
7323 | if (!NILP (val)) |
7324 | { | |
7325 | if (! coding_system_table[i]) | |
7326 | coding_system_table[i] = ((struct coding_system *) | |
7327 | xmalloc (sizeof (struct coding_system))); | |
7328 | setup_coding_system (val, coding_system_table[i]); | |
7329 | } | |
7330 | else if (coding_system_table[i]) | |
7331 | { | |
7332 | xfree (coding_system_table[i]); | |
7333 | coding_system_table[i] = NULL; | |
7334 | } | |
d46c5b12 | 7335 | } |
1397dc18 | 7336 | |
d46c5b12 KH |
7337 | return Qnil; |
7338 | } | |
7339 | ||
66cfb530 KH |
7340 | DEFUN ("set-coding-priority-internal", Fset_coding_priority_internal, |
7341 | Sset_coding_priority_internal, 0, 0, 0, | |
48b0f3ae PJ |
7342 | doc: /* Update internal database for the current value of `coding-category-list'. |
7343 | This function is internal use only. */) | |
7344 | () | |
66cfb530 KH |
7345 | { |
7346 | int i = 0, idx; | |
84d60297 RS |
7347 | Lisp_Object val; |
7348 | ||
7349 | val = Vcoding_category_list; | |
66cfb530 KH |
7350 | |
7351 | while (CONSP (val) && i < CODING_CATEGORY_IDX_MAX) | |
7352 | { | |
03699b14 | 7353 | if (! SYMBOLP (XCAR (val))) |
66cfb530 | 7354 | break; |
03699b14 | 7355 | idx = XFASTINT (Fget (XCAR (val), Qcoding_category_index)); |
66cfb530 KH |
7356 | if (idx >= CODING_CATEGORY_IDX_MAX) |
7357 | break; | |
7358 | coding_priorities[i++] = (1 << idx); | |
03699b14 | 7359 | val = XCDR (val); |
66cfb530 KH |
7360 | } |
7361 | /* If coding-category-list is valid and contains all coding | |
7362 | categories, `i' should be CODING_CATEGORY_IDX_MAX now. If not, | |
fa42c37f | 7363 | the following code saves Emacs from crashing. */ |
66cfb530 KH |
7364 | while (i < CODING_CATEGORY_IDX_MAX) |
7365 | coding_priorities[i++] = CODING_CATEGORY_MASK_RAW_TEXT; | |
7366 | ||
7367 | return Qnil; | |
7368 | } | |
7369 | ||
6b89e3aa KH |
7370 | DEFUN ("define-coding-system-internal", Fdefine_coding_system_internal, |
7371 | Sdefine_coding_system_internal, 1, 1, 0, | |
7372 | doc: /* Register CODING-SYSTEM as a base coding system. | |
7373 | This function is internal use only. */) | |
7374 | (coding_system) | |
7375 | Lisp_Object coding_system; | |
7376 | { | |
7377 | Lisp_Object safe_chars, slot; | |
7378 | ||
7379 | if (NILP (Fcheck_coding_system (coding_system))) | |
7380 | Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil)); | |
7381 | safe_chars = coding_safe_chars (coding_system); | |
7382 | if (! EQ (safe_chars, Qt) && ! CHAR_TABLE_P (safe_chars)) | |
7383 | error ("No valid safe-chars property for %s", | |
7384 | SDATA (SYMBOL_NAME (coding_system))); | |
7385 | if (EQ (safe_chars, Qt)) | |
7386 | { | |
7387 | if (NILP (Fmemq (coding_system, XCAR (Vcoding_system_safe_chars)))) | |
7388 | XSETCAR (Vcoding_system_safe_chars, | |
7389 | Fcons (coding_system, XCAR (Vcoding_system_safe_chars))); | |
7390 | } | |
7391 | else | |
7392 | { | |
7393 | slot = Fassq (coding_system, XCDR (Vcoding_system_safe_chars)); | |
7394 | if (NILP (slot)) | |
7395 | XSETCDR (Vcoding_system_safe_chars, | |
7396 | nconc2 (XCDR (Vcoding_system_safe_chars), | |
7397 | Fcons (Fcons (coding_system, safe_chars), Qnil))); | |
7398 | else | |
7399 | XSETCDR (slot, safe_chars); | |
7400 | } | |
7401 | return Qnil; | |
7402 | } | |
7403 | ||
4ed46869 KH |
7404 | #endif /* emacs */ |
7405 | ||
7406 | \f | |
1397dc18 | 7407 | /*** 9. Post-amble ***/ |
4ed46869 | 7408 | |
dfcf069d | 7409 | void |
4ed46869 KH |
7410 | init_coding_once () |
7411 | { | |
7412 | int i; | |
7413 | ||
93dec019 | 7414 | /* Emacs' internal format specific initialize routine. */ |
4ed46869 KH |
7415 | for (i = 0; i <= 0x20; i++) |
7416 | emacs_code_class[i] = EMACS_control_code; | |
7417 | emacs_code_class[0x0A] = EMACS_linefeed_code; | |
7418 | emacs_code_class[0x0D] = EMACS_carriage_return_code; | |
7419 | for (i = 0x21 ; i < 0x7F; i++) | |
7420 | emacs_code_class[i] = EMACS_ascii_code; | |
7421 | emacs_code_class[0x7F] = EMACS_control_code; | |
ec6d2bb8 | 7422 | for (i = 0x80; i < 0xFF; i++) |
4ed46869 KH |
7423 | emacs_code_class[i] = EMACS_invalid_code; |
7424 | emacs_code_class[LEADING_CODE_PRIVATE_11] = EMACS_leading_code_3; | |
7425 | emacs_code_class[LEADING_CODE_PRIVATE_12] = EMACS_leading_code_3; | |
7426 | emacs_code_class[LEADING_CODE_PRIVATE_21] = EMACS_leading_code_4; | |
7427 | emacs_code_class[LEADING_CODE_PRIVATE_22] = EMACS_leading_code_4; | |
7428 | ||
7429 | /* ISO2022 specific initialize routine. */ | |
7430 | for (i = 0; i < 0x20; i++) | |
b73bfc1c | 7431 | iso_code_class[i] = ISO_control_0; |
4ed46869 KH |
7432 | for (i = 0x21; i < 0x7F; i++) |
7433 | iso_code_class[i] = ISO_graphic_plane_0; | |
7434 | for (i = 0x80; i < 0xA0; i++) | |
b73bfc1c | 7435 | iso_code_class[i] = ISO_control_1; |
4ed46869 KH |
7436 | for (i = 0xA1; i < 0xFF; i++) |
7437 | iso_code_class[i] = ISO_graphic_plane_1; | |
7438 | iso_code_class[0x20] = iso_code_class[0x7F] = ISO_0x20_or_0x7F; | |
7439 | iso_code_class[0xA0] = iso_code_class[0xFF] = ISO_0xA0_or_0xFF; | |
7440 | iso_code_class[ISO_CODE_CR] = ISO_carriage_return; | |
7441 | iso_code_class[ISO_CODE_SO] = ISO_shift_out; | |
7442 | iso_code_class[ISO_CODE_SI] = ISO_shift_in; | |
7443 | iso_code_class[ISO_CODE_SS2_7] = ISO_single_shift_2_7; | |
7444 | iso_code_class[ISO_CODE_ESC] = ISO_escape; | |
7445 | iso_code_class[ISO_CODE_SS2] = ISO_single_shift_2; | |
7446 | iso_code_class[ISO_CODE_SS3] = ISO_single_shift_3; | |
7447 | iso_code_class[ISO_CODE_CSI] = ISO_control_sequence_introducer; | |
7448 | ||
e0e989f6 KH |
7449 | setup_coding_system (Qnil, &keyboard_coding); |
7450 | setup_coding_system (Qnil, &terminal_coding); | |
c4825358 | 7451 | setup_coding_system (Qnil, &safe_terminal_coding); |
6bc51348 | 7452 | setup_coding_system (Qnil, &default_buffer_file_coding); |
9ce27fde | 7453 | |
d46c5b12 KH |
7454 | bzero (coding_system_table, sizeof coding_system_table); |
7455 | ||
66cfb530 KH |
7456 | bzero (ascii_skip_code, sizeof ascii_skip_code); |
7457 | for (i = 0; i < 128; i++) | |
7458 | ascii_skip_code[i] = 1; | |
7459 | ||
9ce27fde KH |
7460 | #if defined (MSDOS) || defined (WINDOWSNT) |
7461 | system_eol_type = CODING_EOL_CRLF; | |
7462 | #else | |
7463 | system_eol_type = CODING_EOL_LF; | |
7464 | #endif | |
b843d1ae KH |
7465 | |
7466 | inhibit_pre_post_conversion = 0; | |
e0e989f6 KH |
7467 | } |
7468 | ||
7469 | #ifdef emacs | |
7470 | ||
dfcf069d | 7471 | void |
e0e989f6 KH |
7472 | syms_of_coding () |
7473 | { | |
7474 | Qtarget_idx = intern ("target-idx"); | |
7475 | staticpro (&Qtarget_idx); | |
7476 | ||
bb0115a2 RS |
7477 | Qcoding_system_history = intern ("coding-system-history"); |
7478 | staticpro (&Qcoding_system_history); | |
7479 | Fset (Qcoding_system_history, Qnil); | |
7480 | ||
9ce27fde | 7481 | /* Target FILENAME is the first argument. */ |
e0e989f6 | 7482 | Fput (Qinsert_file_contents, Qtarget_idx, make_number (0)); |
9ce27fde | 7483 | /* Target FILENAME is the third argument. */ |
e0e989f6 KH |
7484 | Fput (Qwrite_region, Qtarget_idx, make_number (2)); |
7485 | ||
7486 | Qcall_process = intern ("call-process"); | |
7487 | staticpro (&Qcall_process); | |
9ce27fde | 7488 | /* Target PROGRAM is the first argument. */ |
e0e989f6 KH |
7489 | Fput (Qcall_process, Qtarget_idx, make_number (0)); |
7490 | ||
7491 | Qcall_process_region = intern ("call-process-region"); | |
7492 | staticpro (&Qcall_process_region); | |
9ce27fde | 7493 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
7494 | Fput (Qcall_process_region, Qtarget_idx, make_number (2)); |
7495 | ||
7496 | Qstart_process = intern ("start-process"); | |
7497 | staticpro (&Qstart_process); | |
9ce27fde | 7498 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
7499 | Fput (Qstart_process, Qtarget_idx, make_number (2)); |
7500 | ||
7501 | Qopen_network_stream = intern ("open-network-stream"); | |
7502 | staticpro (&Qopen_network_stream); | |
9ce27fde | 7503 | /* Target SERVICE is the fourth argument. */ |
e0e989f6 KH |
7504 | Fput (Qopen_network_stream, Qtarget_idx, make_number (3)); |
7505 | ||
4ed46869 KH |
7506 | Qcoding_system = intern ("coding-system"); |
7507 | staticpro (&Qcoding_system); | |
7508 | ||
7509 | Qeol_type = intern ("eol-type"); | |
7510 | staticpro (&Qeol_type); | |
7511 | ||
7512 | Qbuffer_file_coding_system = intern ("buffer-file-coding-system"); | |
7513 | staticpro (&Qbuffer_file_coding_system); | |
7514 | ||
7515 | Qpost_read_conversion = intern ("post-read-conversion"); | |
7516 | staticpro (&Qpost_read_conversion); | |
7517 | ||
7518 | Qpre_write_conversion = intern ("pre-write-conversion"); | |
7519 | staticpro (&Qpre_write_conversion); | |
7520 | ||
27901516 KH |
7521 | Qno_conversion = intern ("no-conversion"); |
7522 | staticpro (&Qno_conversion); | |
7523 | ||
7524 | Qundecided = intern ("undecided"); | |
7525 | staticpro (&Qundecided); | |
7526 | ||
4ed46869 KH |
7527 | Qcoding_system_p = intern ("coding-system-p"); |
7528 | staticpro (&Qcoding_system_p); | |
7529 | ||
7530 | Qcoding_system_error = intern ("coding-system-error"); | |
7531 | staticpro (&Qcoding_system_error); | |
7532 | ||
7533 | Fput (Qcoding_system_error, Qerror_conditions, | |
7534 | Fcons (Qcoding_system_error, Fcons (Qerror, Qnil))); | |
7535 | Fput (Qcoding_system_error, Qerror_message, | |
9ce27fde | 7536 | build_string ("Invalid coding system")); |
4ed46869 | 7537 | |
d46c5b12 KH |
7538 | Qcoding_category = intern ("coding-category"); |
7539 | staticpro (&Qcoding_category); | |
4ed46869 KH |
7540 | Qcoding_category_index = intern ("coding-category-index"); |
7541 | staticpro (&Qcoding_category_index); | |
7542 | ||
d46c5b12 KH |
7543 | Vcoding_category_table |
7544 | = Fmake_vector (make_number (CODING_CATEGORY_IDX_MAX), Qnil); | |
7545 | staticpro (&Vcoding_category_table); | |
4ed46869 KH |
7546 | { |
7547 | int i; | |
7548 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
7549 | { | |
d46c5b12 KH |
7550 | XVECTOR (Vcoding_category_table)->contents[i] |
7551 | = intern (coding_category_name[i]); | |
7552 | Fput (XVECTOR (Vcoding_category_table)->contents[i], | |
7553 | Qcoding_category_index, make_number (i)); | |
4ed46869 KH |
7554 | } |
7555 | } | |
7556 | ||
6b89e3aa KH |
7557 | Vcoding_system_safe_chars = Fcons (Qnil, Qnil); |
7558 | staticpro (&Vcoding_system_safe_chars); | |
7559 | ||
f967223b KH |
7560 | Qtranslation_table = intern ("translation-table"); |
7561 | staticpro (&Qtranslation_table); | |
b666620c | 7562 | Fput (Qtranslation_table, Qchar_table_extra_slots, make_number (2)); |
bdd9fb48 | 7563 | |
f967223b KH |
7564 | Qtranslation_table_id = intern ("translation-table-id"); |
7565 | staticpro (&Qtranslation_table_id); | |
84fbb8a0 | 7566 | |
f967223b KH |
7567 | Qtranslation_table_for_decode = intern ("translation-table-for-decode"); |
7568 | staticpro (&Qtranslation_table_for_decode); | |
a5d301df | 7569 | |
f967223b KH |
7570 | Qtranslation_table_for_encode = intern ("translation-table-for-encode"); |
7571 | staticpro (&Qtranslation_table_for_encode); | |
a5d301df | 7572 | |
05e6f5dc KH |
7573 | Qsafe_chars = intern ("safe-chars"); |
7574 | staticpro (&Qsafe_chars); | |
7575 | ||
7576 | Qchar_coding_system = intern ("char-coding-system"); | |
7577 | staticpro (&Qchar_coding_system); | |
7578 | ||
7579 | /* Intern this now in case it isn't already done. | |
7580 | Setting this variable twice is harmless. | |
7581 | But don't staticpro it here--that is done in alloc.c. */ | |
7582 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
7583 | Fput (Qsafe_chars, Qchar_table_extra_slots, make_number (0)); | |
067a6a66 | 7584 | Fput (Qchar_coding_system, Qchar_table_extra_slots, make_number (0)); |
70c22245 | 7585 | |
1397dc18 KH |
7586 | Qvalid_codes = intern ("valid-codes"); |
7587 | staticpro (&Qvalid_codes); | |
7588 | ||
9ce27fde KH |
7589 | Qemacs_mule = intern ("emacs-mule"); |
7590 | staticpro (&Qemacs_mule); | |
7591 | ||
d46c5b12 KH |
7592 | Qraw_text = intern ("raw-text"); |
7593 | staticpro (&Qraw_text); | |
7594 | ||
ecf488bc DL |
7595 | Qutf_8 = intern ("utf-8"); |
7596 | staticpro (&Qutf_8); | |
7597 | ||
4ed46869 KH |
7598 | defsubr (&Scoding_system_p); |
7599 | defsubr (&Sread_coding_system); | |
7600 | defsubr (&Sread_non_nil_coding_system); | |
7601 | defsubr (&Scheck_coding_system); | |
7602 | defsubr (&Sdetect_coding_region); | |
d46c5b12 | 7603 | defsubr (&Sdetect_coding_string); |
05e6f5dc | 7604 | defsubr (&Sfind_coding_systems_region_internal); |
068a9dbd | 7605 | defsubr (&Sunencodable_char_position); |
4ed46869 KH |
7606 | defsubr (&Sdecode_coding_region); |
7607 | defsubr (&Sencode_coding_region); | |
7608 | defsubr (&Sdecode_coding_string); | |
7609 | defsubr (&Sencode_coding_string); | |
7610 | defsubr (&Sdecode_sjis_char); | |
7611 | defsubr (&Sencode_sjis_char); | |
7612 | defsubr (&Sdecode_big5_char); | |
7613 | defsubr (&Sencode_big5_char); | |
1ba9e4ab | 7614 | defsubr (&Sset_terminal_coding_system_internal); |
c4825358 | 7615 | defsubr (&Sset_safe_terminal_coding_system_internal); |
4ed46869 | 7616 | defsubr (&Sterminal_coding_system); |
1ba9e4ab | 7617 | defsubr (&Sset_keyboard_coding_system_internal); |
4ed46869 | 7618 | defsubr (&Skeyboard_coding_system); |
a5d301df | 7619 | defsubr (&Sfind_operation_coding_system); |
1397dc18 | 7620 | defsubr (&Supdate_coding_systems_internal); |
66cfb530 | 7621 | defsubr (&Sset_coding_priority_internal); |
6b89e3aa | 7622 | defsubr (&Sdefine_coding_system_internal); |
4ed46869 | 7623 | |
4608c386 | 7624 | DEFVAR_LISP ("coding-system-list", &Vcoding_system_list, |
48b0f3ae PJ |
7625 | doc: /* List of coding systems. |
7626 | ||
7627 | Do not alter the value of this variable manually. This variable should be | |
7628 | updated by the functions `make-coding-system' and | |
7629 | `define-coding-system-alias'. */); | |
4608c386 KH |
7630 | Vcoding_system_list = Qnil; |
7631 | ||
7632 | DEFVAR_LISP ("coding-system-alist", &Vcoding_system_alist, | |
48b0f3ae PJ |
7633 | doc: /* Alist of coding system names. |
7634 | Each element is one element list of coding system name. | |
7635 | This variable is given to `completing-read' as TABLE argument. | |
7636 | ||
7637 | Do not alter the value of this variable manually. This variable should be | |
7638 | updated by the functions `make-coding-system' and | |
7639 | `define-coding-system-alias'. */); | |
4608c386 KH |
7640 | Vcoding_system_alist = Qnil; |
7641 | ||
4ed46869 | 7642 | DEFVAR_LISP ("coding-category-list", &Vcoding_category_list, |
48b0f3ae PJ |
7643 | doc: /* List of coding-categories (symbols) ordered by priority. |
7644 | ||
7645 | On detecting a coding system, Emacs tries code detection algorithms | |
7646 | associated with each coding-category one by one in this order. When | |
7647 | one algorithm agrees with a byte sequence of source text, the coding | |
7648 | system bound to the corresponding coding-category is selected. */); | |
4ed46869 KH |
7649 | { |
7650 | int i; | |
7651 | ||
7652 | Vcoding_category_list = Qnil; | |
7653 | for (i = CODING_CATEGORY_IDX_MAX - 1; i >= 0; i--) | |
7654 | Vcoding_category_list | |
d46c5b12 KH |
7655 | = Fcons (XVECTOR (Vcoding_category_table)->contents[i], |
7656 | Vcoding_category_list); | |
4ed46869 KH |
7657 | } |
7658 | ||
7659 | DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read, | |
48b0f3ae PJ |
7660 | doc: /* Specify the coding system for read operations. |
7661 | It is useful to bind this variable with `let', but do not set it globally. | |
7662 | If the value is a coding system, it is used for decoding on read operation. | |
7663 | If not, an appropriate element is used from one of the coding system alists: | |
7664 | There are three such tables, `file-coding-system-alist', | |
7665 | `process-coding-system-alist', and `network-coding-system-alist'. */); | |
4ed46869 KH |
7666 | Vcoding_system_for_read = Qnil; |
7667 | ||
7668 | DEFVAR_LISP ("coding-system-for-write", &Vcoding_system_for_write, | |
48b0f3ae PJ |
7669 | doc: /* Specify the coding system for write operations. |
7670 | Programs bind this variable with `let', but you should not set it globally. | |
7671 | If the value is a coding system, it is used for encoding of output, | |
7672 | when writing it to a file and when sending it to a file or subprocess. | |
7673 | ||
7674 | If this does not specify a coding system, an appropriate element | |
7675 | is used from one of the coding system alists: | |
7676 | There are three such tables, `file-coding-system-alist', | |
7677 | `process-coding-system-alist', and `network-coding-system-alist'. | |
7678 | For output to files, if the above procedure does not specify a coding system, | |
7679 | the value of `buffer-file-coding-system' is used. */); | |
4ed46869 KH |
7680 | Vcoding_system_for_write = Qnil; |
7681 | ||
7682 | DEFVAR_LISP ("last-coding-system-used", &Vlast_coding_system_used, | |
7c695ab9 DL |
7683 | doc: /* Coding system used in the latest file or process I/O. |
7684 | Also set by `encode-coding-region', `decode-coding-region', | |
7685 | `encode-coding-string' and `decode-coding-string'. */); | |
4ed46869 KH |
7686 | Vlast_coding_system_used = Qnil; |
7687 | ||
9ce27fde | 7688 | DEFVAR_BOOL ("inhibit-eol-conversion", &inhibit_eol_conversion, |
48b0f3ae PJ |
7689 | doc: /* *Non-nil means always inhibit code conversion of end-of-line format. |
7690 | See info node `Coding Systems' and info node `Text and Binary' concerning | |
7691 | such conversion. */); | |
9ce27fde KH |
7692 | inhibit_eol_conversion = 0; |
7693 | ||
ed29121d | 7694 | DEFVAR_BOOL ("inherit-process-coding-system", &inherit_process_coding_system, |
48b0f3ae PJ |
7695 | doc: /* Non-nil means process buffer inherits coding system of process output. |
7696 | Bind it to t if the process output is to be treated as if it were a file | |
7697 | read from some filesystem. */); | |
ed29121d EZ |
7698 | inherit_process_coding_system = 0; |
7699 | ||
02ba4723 | 7700 | DEFVAR_LISP ("file-coding-system-alist", &Vfile_coding_system_alist, |
48b0f3ae PJ |
7701 | doc: /* Alist to decide a coding system to use for a file I/O operation. |
7702 | The format is ((PATTERN . VAL) ...), | |
7703 | where PATTERN is a regular expression matching a file name, | |
7704 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
7705 | If VAL is a coding system, it is used for both decoding and encoding | |
7706 | the file contents. | |
7707 | If VAL is a cons of coding systems, the car part is used for decoding, | |
7708 | and the cdr part is used for encoding. | |
7709 | If VAL is a function symbol, the function must return a coding system | |
0192762c | 7710 | or a cons of coding systems which are used as above. The function gets |
ff955d90 | 7711 | the arguments with which `find-operation-coding-system' was called. |
48b0f3ae PJ |
7712 | |
7713 | See also the function `find-operation-coding-system' | |
7714 | and the variable `auto-coding-alist'. */); | |
02ba4723 KH |
7715 | Vfile_coding_system_alist = Qnil; |
7716 | ||
7717 | DEFVAR_LISP ("process-coding-system-alist", &Vprocess_coding_system_alist, | |
48b0f3ae PJ |
7718 | doc: /* Alist to decide a coding system to use for a process I/O operation. |
7719 | The format is ((PATTERN . VAL) ...), | |
7720 | where PATTERN is a regular expression matching a program name, | |
7721 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
7722 | If VAL is a coding system, it is used for both decoding what received | |
7723 | from the program and encoding what sent to the program. | |
7724 | If VAL is a cons of coding systems, the car part is used for decoding, | |
7725 | and the cdr part is used for encoding. | |
7726 | If VAL is a function symbol, the function must return a coding system | |
7727 | or a cons of coding systems which are used as above. | |
7728 | ||
7729 | See also the function `find-operation-coding-system'. */); | |
02ba4723 KH |
7730 | Vprocess_coding_system_alist = Qnil; |
7731 | ||
7732 | DEFVAR_LISP ("network-coding-system-alist", &Vnetwork_coding_system_alist, | |
48b0f3ae PJ |
7733 | doc: /* Alist to decide a coding system to use for a network I/O operation. |
7734 | The format is ((PATTERN . VAL) ...), | |
7735 | where PATTERN is a regular expression matching a network service name | |
7736 | or is a port number to connect to, | |
7737 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
7738 | If VAL is a coding system, it is used for both decoding what received | |
7739 | from the network stream and encoding what sent to the network stream. | |
7740 | If VAL is a cons of coding systems, the car part is used for decoding, | |
7741 | and the cdr part is used for encoding. | |
7742 | If VAL is a function symbol, the function must return a coding system | |
7743 | or a cons of coding systems which are used as above. | |
7744 | ||
7745 | See also the function `find-operation-coding-system'. */); | |
02ba4723 | 7746 | Vnetwork_coding_system_alist = Qnil; |
4ed46869 | 7747 | |
68c45bf0 | 7748 | DEFVAR_LISP ("locale-coding-system", &Vlocale_coding_system, |
75205970 RS |
7749 | doc: /* Coding system to use with system messages. |
7750 | Also used for decoding keyboard input on X Window system. */); | |
68c45bf0 PE |
7751 | Vlocale_coding_system = Qnil; |
7752 | ||
005f0d35 | 7753 | /* The eol mnemonics are reset in startup.el system-dependently. */ |
7722baf9 | 7754 | DEFVAR_LISP ("eol-mnemonic-unix", &eol_mnemonic_unix, |
48b0f3ae | 7755 | doc: /* *String displayed in mode line for UNIX-like (LF) end-of-line format. */); |
7722baf9 | 7756 | eol_mnemonic_unix = build_string (":"); |
4ed46869 | 7757 | |
7722baf9 | 7758 | DEFVAR_LISP ("eol-mnemonic-dos", &eol_mnemonic_dos, |
48b0f3ae | 7759 | doc: /* *String displayed in mode line for DOS-like (CRLF) end-of-line format. */); |
7722baf9 | 7760 | eol_mnemonic_dos = build_string ("\\"); |
4ed46869 | 7761 | |
7722baf9 | 7762 | DEFVAR_LISP ("eol-mnemonic-mac", &eol_mnemonic_mac, |
48b0f3ae | 7763 | doc: /* *String displayed in mode line for MAC-like (CR) end-of-line format. */); |
7722baf9 | 7764 | eol_mnemonic_mac = build_string ("/"); |
4ed46869 | 7765 | |
7722baf9 | 7766 | DEFVAR_LISP ("eol-mnemonic-undecided", &eol_mnemonic_undecided, |
48b0f3ae | 7767 | doc: /* *String displayed in mode line when end-of-line format is not yet determined. */); |
7722baf9 | 7768 | eol_mnemonic_undecided = build_string (":"); |
4ed46869 | 7769 | |
84fbb8a0 | 7770 | DEFVAR_LISP ("enable-character-translation", &Venable_character_translation, |
48b0f3ae | 7771 | doc: /* *Non-nil enables character translation while encoding and decoding. */); |
84fbb8a0 | 7772 | Venable_character_translation = Qt; |
bdd9fb48 | 7773 | |
f967223b | 7774 | DEFVAR_LISP ("standard-translation-table-for-decode", |
48b0f3ae PJ |
7775 | &Vstandard_translation_table_for_decode, |
7776 | doc: /* Table for translating characters while decoding. */); | |
f967223b | 7777 | Vstandard_translation_table_for_decode = Qnil; |
bdd9fb48 | 7778 | |
f967223b | 7779 | DEFVAR_LISP ("standard-translation-table-for-encode", |
48b0f3ae PJ |
7780 | &Vstandard_translation_table_for_encode, |
7781 | doc: /* Table for translating characters while encoding. */); | |
f967223b | 7782 | Vstandard_translation_table_for_encode = Qnil; |
4ed46869 KH |
7783 | |
7784 | DEFVAR_LISP ("charset-revision-table", &Vcharset_revision_alist, | |
48b0f3ae PJ |
7785 | doc: /* Alist of charsets vs revision numbers. |
7786 | While encoding, if a charset (car part of an element) is found, | |
7787 | designate it with the escape sequence identifying revision (cdr part of the element). */); | |
4ed46869 | 7788 | Vcharset_revision_alist = Qnil; |
02ba4723 KH |
7789 | |
7790 | DEFVAR_LISP ("default-process-coding-system", | |
7791 | &Vdefault_process_coding_system, | |
48b0f3ae PJ |
7792 | doc: /* Cons of coding systems used for process I/O by default. |
7793 | The car part is used for decoding a process output, | |
7794 | the cdr part is used for encoding a text to be sent to a process. */); | |
02ba4723 | 7795 | Vdefault_process_coding_system = Qnil; |
c4825358 | 7796 | |
3f003981 | 7797 | DEFVAR_LISP ("latin-extra-code-table", &Vlatin_extra_code_table, |
48b0f3ae PJ |
7798 | doc: /* Table of extra Latin codes in the range 128..159 (inclusive). |
7799 | This is a vector of length 256. | |
7800 | If Nth element is non-nil, the existence of code N in a file | |
7801 | \(or output of subprocess) doesn't prevent it to be detected as | |
7802 | a coding system of ISO 2022 variant which has a flag | |
7803 | `accept-latin-extra-code' t (e.g. iso-latin-1) on reading a file | |
7804 | or reading output of a subprocess. | |
7805 | Only 128th through 159th elements has a meaning. */); | |
3f003981 | 7806 | Vlatin_extra_code_table = Fmake_vector (make_number (256), Qnil); |
d46c5b12 KH |
7807 | |
7808 | DEFVAR_LISP ("select-safe-coding-system-function", | |
7809 | &Vselect_safe_coding_system_function, | |
48b0f3ae PJ |
7810 | doc: /* Function to call to select safe coding system for encoding a text. |
7811 | ||
7812 | If set, this function is called to force a user to select a proper | |
7813 | coding system which can encode the text in the case that a default | |
7814 | coding system used in each operation can't encode the text. | |
7815 | ||
7816 | The default value is `select-safe-coding-system' (which see). */); | |
d46c5b12 KH |
7817 | Vselect_safe_coding_system_function = Qnil; |
7818 | ||
5d5bf4d8 KH |
7819 | DEFVAR_BOOL ("coding-system-require-warning", |
7820 | &coding_system_require_warning, | |
7821 | doc: /* Internal use only. | |
6b89e3aa KH |
7822 | If non-nil, on writing a file, `select-safe-coding-system-function' is |
7823 | called even if `coding-system-for-write' is non-nil. The command | |
7824 | `universal-coding-system-argument' binds this variable to t temporarily. */); | |
5d5bf4d8 KH |
7825 | coding_system_require_warning = 0; |
7826 | ||
7827 | ||
22ab2303 | 7828 | DEFVAR_BOOL ("inhibit-iso-escape-detection", |
74383408 | 7829 | &inhibit_iso_escape_detection, |
48b0f3ae PJ |
7830 | doc: /* If non-nil, Emacs ignores ISO2022's escape sequence on code detection. |
7831 | ||
7832 | By default, on reading a file, Emacs tries to detect how the text is | |
7833 | encoded. This code detection is sensitive to escape sequences. If | |
7834 | the sequence is valid as ISO2022, the code is determined as one of | |
7835 | the ISO2022 encodings, and the file is decoded by the corresponding | |
7836 | coding system (e.g. `iso-2022-7bit'). | |
7837 | ||
7838 | However, there may be a case that you want to read escape sequences in | |
7839 | a file as is. In such a case, you can set this variable to non-nil. | |
7840 | Then, as the code detection ignores any escape sequences, no file is | |
7841 | detected as encoded in some ISO2022 encoding. The result is that all | |
7842 | escape sequences become visible in a buffer. | |
7843 | ||
7844 | The default value is nil, and it is strongly recommended not to change | |
7845 | it. That is because many Emacs Lisp source files that contain | |
7846 | non-ASCII characters are encoded by the coding system `iso-2022-7bit' | |
7847 | in Emacs's distribution, and they won't be decoded correctly on | |
7848 | reading if you suppress escape sequence detection. | |
7849 | ||
7850 | The other way to read escape sequences in a file without decoding is | |
7851 | to explicitly specify some coding system that doesn't use ISO2022's | |
7852 | escape sequence (e.g `latin-1') on reading by \\[universal-coding-system-argument]. */); | |
74383408 | 7853 | inhibit_iso_escape_detection = 0; |
002fdb44 DL |
7854 | |
7855 | DEFVAR_LISP ("translation-table-for-input", &Vtranslation_table_for_input, | |
15c8f9d1 DL |
7856 | doc: /* Char table for translating self-inserting characters. |
7857 | This is applied to the result of input methods, not their input. See also | |
7858 | `keyboard-translate-table'. */); | |
002fdb44 | 7859 | Vtranslation_table_for_input = Qnil; |
4ed46869 KH |
7860 | } |
7861 | ||
68c45bf0 PE |
7862 | char * |
7863 | emacs_strerror (error_number) | |
7864 | int error_number; | |
7865 | { | |
7866 | char *str; | |
7867 | ||
ca9c0567 | 7868 | synchronize_system_messages_locale (); |
68c45bf0 PE |
7869 | str = strerror (error_number); |
7870 | ||
7871 | if (! NILP (Vlocale_coding_system)) | |
7872 | { | |
7873 | Lisp_Object dec = code_convert_string_norecord (build_string (str), | |
7874 | Vlocale_coding_system, | |
7875 | 0); | |
d5db4077 | 7876 | str = (char *) SDATA (dec); |
68c45bf0 PE |
7877 | } |
7878 | ||
7879 | return str; | |
7880 | } | |
7881 | ||
4ed46869 | 7882 | #endif /* emacs */ |
c2f94ebc | 7883 | |
ab5796a9 MB |
7884 | /* arch-tag: 3a3a2b01-5ff6-4071-9afe-f5b808d9229d |
7885 | (do not change this comment) */ |