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4ed46869 | 1 | /* Coding system handler (conversion, detection, and etc). |
4a2f9c6a | 2 | Copyright (C) 1995, 1997, 1998 Electrotechnical Laboratory, JAPAN. |
203cb916 | 3 | Licensed to the Free Software Foundation. |
4ed46869 | 4 | |
369314dc KH |
5 | This file is part of GNU Emacs. |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
4ed46869 | 11 | |
369314dc KH |
12 | GNU Emacs is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
4ed46869 | 16 | |
369314dc KH |
17 | You should have received a copy of the GNU General Public License |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
4ed46869 KH |
21 | |
22 | /*** TABLE OF CONTENTS *** | |
23 | ||
b73bfc1c | 24 | 0. General comments |
4ed46869 | 25 | 1. Preamble |
0ef69138 | 26 | 2. Emacs' internal format (emacs-mule) handlers |
4ed46869 KH |
27 | 3. ISO2022 handlers |
28 | 4. Shift-JIS and BIG5 handlers | |
1397dc18 KH |
29 | 5. CCL handlers |
30 | 6. End-of-line handlers | |
31 | 7. C library functions | |
32 | 8. Emacs Lisp library functions | |
33 | 9. Post-amble | |
4ed46869 KH |
34 | |
35 | */ | |
36 | ||
b73bfc1c KH |
37 | /*** 0. General comments ***/ |
38 | ||
39 | ||
4ed46869 KH |
40 | /*** GENERAL NOTE on CODING SYSTEM *** |
41 | ||
42 | Coding system is an encoding mechanism of one or more character | |
43 | sets. Here's a list of coding systems which Emacs can handle. When | |
44 | we say "decode", it means converting some other coding system to | |
0ef69138 KH |
45 | Emacs' internal format (emacs-internal), and when we say "encode", |
46 | it means converting the coding system emacs-mule to some other | |
47 | coding system. | |
4ed46869 | 48 | |
0ef69138 | 49 | 0. Emacs' internal format (emacs-mule) |
4ed46869 KH |
50 | |
51 | Emacs itself holds a multi-lingual character in a buffer and a string | |
f4dee582 | 52 | in a special format. Details are described in section 2. |
4ed46869 KH |
53 | |
54 | 1. ISO2022 | |
55 | ||
56 | The most famous coding system for multiple character sets. X's | |
f4dee582 RS |
57 | Compound Text, various EUCs (Extended Unix Code), and coding |
58 | systems used in Internet communication such as ISO-2022-JP are | |
59 | all variants of ISO2022. Details are described in section 3. | |
4ed46869 KH |
60 | |
61 | 2. SJIS (or Shift-JIS or MS-Kanji-Code) | |
62 | ||
63 | A coding system to encode character sets: ASCII, JISX0201, and | |
64 | JISX0208. Widely used for PC's in Japan. Details are described in | |
f4dee582 | 65 | section 4. |
4ed46869 KH |
66 | |
67 | 3. BIG5 | |
68 | ||
69 | A coding system to encode character sets: ASCII and Big5. Widely | |
70 | used by Chinese (mainly in Taiwan and Hong Kong). Details are | |
f4dee582 RS |
71 | described in section 4. In this file, when we write "BIG5" |
72 | (all uppercase), we mean the coding system, and when we write | |
73 | "Big5" (capitalized), we mean the character set. | |
4ed46869 | 74 | |
27901516 KH |
75 | 4. Raw text |
76 | ||
4608c386 KH |
77 | A coding system for a text containing random 8-bit code. Emacs does |
78 | no code conversion on such a text except for end-of-line format. | |
27901516 KH |
79 | |
80 | 5. Other | |
4ed46869 | 81 | |
f4dee582 | 82 | If a user wants to read/write a text encoded in a coding system not |
4ed46869 KH |
83 | listed above, he can supply a decoder and an encoder for it in CCL |
84 | (Code Conversion Language) programs. Emacs executes the CCL program | |
85 | while reading/writing. | |
86 | ||
d46c5b12 KH |
87 | Emacs represents a coding system by a Lisp symbol that has a property |
88 | `coding-system'. But, before actually using the coding system, the | |
4ed46869 | 89 | information about it is set in a structure of type `struct |
f4dee582 | 90 | coding_system' for rapid processing. See section 6 for more details. |
4ed46869 KH |
91 | |
92 | */ | |
93 | ||
94 | /*** GENERAL NOTES on END-OF-LINE FORMAT *** | |
95 | ||
96 | How end-of-line of a text is encoded depends on a system. For | |
97 | instance, Unix's format is just one byte of `line-feed' code, | |
f4dee582 | 98 | whereas DOS's format is two-byte sequence of `carriage-return' and |
d46c5b12 KH |
99 | `line-feed' codes. MacOS's format is usually one byte of |
100 | `carriage-return'. | |
4ed46869 | 101 | |
f4dee582 RS |
102 | Since text characters encoding and end-of-line encoding are |
103 | independent, any coding system described above can take | |
4ed46869 | 104 | any format of end-of-line. So, Emacs has information of format of |
f4dee582 | 105 | end-of-line in each coding-system. See section 6 for more details. |
4ed46869 KH |
106 | |
107 | */ | |
108 | ||
109 | /*** GENERAL NOTES on `detect_coding_XXX ()' functions *** | |
110 | ||
111 | These functions check if a text between SRC and SRC_END is encoded | |
112 | in the coding system category XXX. Each returns an integer value in | |
113 | which appropriate flag bits for the category XXX is set. The flag | |
114 | bits are defined in macros CODING_CATEGORY_MASK_XXX. Below is the | |
115 | template of these functions. */ | |
116 | #if 0 | |
117 | int | |
0ef69138 | 118 | detect_coding_emacs_mule (src, src_end) |
4ed46869 KH |
119 | unsigned char *src, *src_end; |
120 | { | |
121 | ... | |
122 | } | |
123 | #endif | |
124 | ||
125 | /*** GENERAL NOTES on `decode_coding_XXX ()' functions *** | |
126 | ||
b73bfc1c KH |
127 | These functions decode SRC_BYTES length of unibyte text at SOURCE |
128 | encoded in CODING to Emacs' internal format. The resulting | |
129 | multibyte text goes to a place pointed to by DESTINATION, the length | |
130 | of which should not exceed DST_BYTES. | |
d46c5b12 | 131 | |
b73bfc1c KH |
132 | These functions set the information of original and decoded texts in |
133 | the members produced, produced_char, consumed, and consumed_char of | |
134 | the structure *CODING. They also set the member result to one of | |
135 | CODING_FINISH_XXX indicating how the decoding finished. | |
d46c5b12 KH |
136 | |
137 | DST_BYTES zero means that source area and destination area are | |
138 | overlapped, which means that we can produce a decoded text until it | |
139 | reaches at the head of not-yet-decoded source text. | |
140 | ||
141 | Below is a template of these functions. */ | |
4ed46869 | 142 | #if 0 |
b73bfc1c | 143 | static void |
d46c5b12 | 144 | decode_coding_XXX (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
145 | struct coding_system *coding; |
146 | unsigned char *source, *destination; | |
147 | int src_bytes, dst_bytes; | |
4ed46869 KH |
148 | { |
149 | ... | |
150 | } | |
151 | #endif | |
152 | ||
153 | /*** GENERAL NOTES on `encode_coding_XXX ()' functions *** | |
154 | ||
0ef69138 | 155 | These functions encode SRC_BYTES length text at SOURCE of Emacs' |
b73bfc1c KH |
156 | internal multibyte format to CODING. The resulting unibyte text |
157 | goes to a place pointed to by DESTINATION, the length of which | |
158 | should not exceed DST_BYTES. | |
d46c5b12 | 159 | |
b73bfc1c KH |
160 | These functions set the information of original and encoded texts in |
161 | the members produced, produced_char, consumed, and consumed_char of | |
162 | the structure *CODING. They also set the member result to one of | |
163 | CODING_FINISH_XXX indicating how the encoding finished. | |
d46c5b12 KH |
164 | |
165 | DST_BYTES zero means that source area and destination area are | |
b73bfc1c KH |
166 | overlapped, which means that we can produce a encoded text until it |
167 | reaches at the head of not-yet-encoded source text. | |
d46c5b12 KH |
168 | |
169 | Below is a template of these functions. */ | |
4ed46869 | 170 | #if 0 |
b73bfc1c | 171 | static void |
d46c5b12 | 172 | encode_coding_XXX (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
173 | struct coding_system *coding; |
174 | unsigned char *source, *destination; | |
175 | int src_bytes, dst_bytes; | |
4ed46869 KH |
176 | { |
177 | ... | |
178 | } | |
179 | #endif | |
180 | ||
181 | /*** COMMONLY USED MACROS ***/ | |
182 | ||
b73bfc1c KH |
183 | /* The following two macros ONE_MORE_BYTE and TWO_MORE_BYTES safely |
184 | get one, two, and three bytes from the source text respectively. | |
185 | If there are not enough bytes in the source, they jump to | |
186 | `label_end_of_loop'. The caller should set variables `coding', | |
187 | `src' and `src_end' to appropriate pointer in advance. These | |
188 | macros are called from decoding routines `decode_coding_XXX', thus | |
189 | it is assumed that the source text is unibyte. */ | |
4ed46869 | 190 | |
b73bfc1c KH |
191 | #define ONE_MORE_BYTE(c1) \ |
192 | do { \ | |
193 | if (src >= src_end) \ | |
194 | { \ | |
195 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
196 | goto label_end_of_loop; \ | |
197 | } \ | |
198 | c1 = *src++; \ | |
4ed46869 KH |
199 | } while (0) |
200 | ||
b73bfc1c KH |
201 | #define TWO_MORE_BYTES(c1, c2) \ |
202 | do { \ | |
203 | if (src + 1 >= src_end) \ | |
204 | { \ | |
205 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
206 | goto label_end_of_loop; \ | |
207 | } \ | |
208 | c1 = *src++; \ | |
209 | c2 = *src++; \ | |
4ed46869 KH |
210 | } while (0) |
211 | ||
4ed46869 | 212 | |
b73bfc1c KH |
213 | /* Set C to the next character at the source text pointed by `src'. |
214 | If there are not enough characters in the source, jump to | |
215 | `label_end_of_loop'. The caller should set variables `coding' | |
216 | `src', `src_end', and `translation_table' to appropriate pointers | |
217 | in advance. This macro is used in encoding routines | |
218 | `encode_coding_XXX', thus it assumes that the source text is in | |
219 | multibyte form except for 8-bit characters. 8-bit characters are | |
220 | in multibyte form if coding->src_multibyte is nonzero, else they | |
221 | are represented by a single byte. */ | |
4ed46869 | 222 | |
b73bfc1c KH |
223 | #define ONE_MORE_CHAR(c) \ |
224 | do { \ | |
225 | int len = src_end - src; \ | |
226 | int bytes; \ | |
227 | if (len <= 0) \ | |
228 | { \ | |
229 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
230 | goto label_end_of_loop; \ | |
231 | } \ | |
232 | if (coding->src_multibyte \ | |
233 | || UNIBYTE_STR_AS_MULTIBYTE_P (src, len, bytes)) \ | |
234 | c = STRING_CHAR_AND_LENGTH (src, len, bytes); \ | |
235 | else \ | |
236 | c = *src, bytes = 1; \ | |
237 | if (!NILP (translation_table)) \ | |
39658efc | 238 | c = translate_char (translation_table, c, -1, 0, 0); \ |
b73bfc1c | 239 | src += bytes; \ |
4ed46869 KH |
240 | } while (0) |
241 | ||
4ed46869 | 242 | |
b73bfc1c KH |
243 | /* Produce a multibyte form of characater C to `dst'. Jump to |
244 | `label_end_of_loop' if there's not enough space at `dst'. | |
245 | ||
246 | If we are now in the middle of composition sequence, the decoded | |
247 | character may be ALTCHAR (for the current composition). In that | |
248 | case, the character goes to coding->cmp_data->data instead of | |
249 | `dst'. | |
250 | ||
251 | This macro is used in decoding routines. */ | |
252 | ||
253 | #define EMIT_CHAR(c) \ | |
4ed46869 | 254 | do { \ |
b73bfc1c KH |
255 | if (! COMPOSING_P (coding) \ |
256 | || coding->composing == COMPOSITION_RELATIVE \ | |
257 | || coding->composing == COMPOSITION_WITH_RULE) \ | |
258 | { \ | |
259 | int bytes = CHAR_BYTES (c); \ | |
260 | if ((dst + bytes) > (dst_bytes ? dst_end : src)) \ | |
261 | { \ | |
262 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
263 | goto label_end_of_loop; \ | |
264 | } \ | |
265 | dst += CHAR_STRING (c, dst); \ | |
266 | coding->produced_char++; \ | |
267 | } \ | |
ec6d2bb8 | 268 | \ |
b73bfc1c KH |
269 | if (COMPOSING_P (coding) \ |
270 | && coding->composing != COMPOSITION_RELATIVE) \ | |
271 | { \ | |
272 | CODING_ADD_COMPOSITION_COMPONENT (coding, c); \ | |
273 | coding->composition_rule_follows \ | |
274 | = coding->composing != COMPOSITION_WITH_ALTCHARS; \ | |
275 | } \ | |
4ed46869 KH |
276 | } while (0) |
277 | ||
4ed46869 | 278 | |
b73bfc1c KH |
279 | #define EMIT_ONE_BYTE(c) \ |
280 | do { \ | |
281 | if (dst >= (dst_bytes ? dst_end : src)) \ | |
282 | { \ | |
283 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
284 | goto label_end_of_loop; \ | |
285 | } \ | |
286 | *dst++ = c; \ | |
287 | } while (0) | |
288 | ||
289 | #define EMIT_TWO_BYTES(c1, c2) \ | |
290 | do { \ | |
291 | if (dst + 2 > (dst_bytes ? dst_end : src)) \ | |
292 | { \ | |
293 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
294 | goto label_end_of_loop; \ | |
295 | } \ | |
296 | *dst++ = c1, *dst++ = c2; \ | |
297 | } while (0) | |
298 | ||
299 | #define EMIT_BYTES(from, to) \ | |
300 | do { \ | |
301 | if (dst + (to - from) > (dst_bytes ? dst_end : src)) \ | |
302 | { \ | |
303 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
304 | goto label_end_of_loop; \ | |
305 | } \ | |
306 | while (from < to) \ | |
307 | *dst++ = *from++; \ | |
4ed46869 KH |
308 | } while (0) |
309 | ||
310 | \f | |
311 | /*** 1. Preamble ***/ | |
312 | ||
68c45bf0 PE |
313 | #ifdef emacs |
314 | #include <config.h> | |
315 | #endif | |
316 | ||
4ed46869 KH |
317 | #include <stdio.h> |
318 | ||
319 | #ifdef emacs | |
320 | ||
4ed46869 KH |
321 | #include "lisp.h" |
322 | #include "buffer.h" | |
323 | #include "charset.h" | |
ec6d2bb8 | 324 | #include "composite.h" |
4ed46869 KH |
325 | #include "ccl.h" |
326 | #include "coding.h" | |
327 | #include "window.h" | |
328 | ||
329 | #else /* not emacs */ | |
330 | ||
331 | #include "mulelib.h" | |
332 | ||
333 | #endif /* not emacs */ | |
334 | ||
335 | Lisp_Object Qcoding_system, Qeol_type; | |
336 | Lisp_Object Qbuffer_file_coding_system; | |
337 | Lisp_Object Qpost_read_conversion, Qpre_write_conversion; | |
27901516 | 338 | Lisp_Object Qno_conversion, Qundecided; |
bb0115a2 | 339 | Lisp_Object Qcoding_system_history; |
05e6f5dc | 340 | Lisp_Object Qsafe_chars; |
1397dc18 | 341 | Lisp_Object Qvalid_codes; |
4ed46869 KH |
342 | |
343 | extern Lisp_Object Qinsert_file_contents, Qwrite_region; | |
344 | Lisp_Object Qcall_process, Qcall_process_region, Qprocess_argument; | |
345 | Lisp_Object Qstart_process, Qopen_network_stream; | |
346 | Lisp_Object Qtarget_idx; | |
347 | ||
d46c5b12 KH |
348 | Lisp_Object Vselect_safe_coding_system_function; |
349 | ||
7722baf9 EZ |
350 | /* Mnemonic string for each format of end-of-line. */ |
351 | Lisp_Object eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac; | |
352 | /* Mnemonic string to indicate format of end-of-line is not yet | |
4ed46869 | 353 | decided. */ |
7722baf9 | 354 | Lisp_Object eol_mnemonic_undecided; |
4ed46869 | 355 | |
9ce27fde KH |
356 | /* Format of end-of-line decided by system. This is CODING_EOL_LF on |
357 | Unix, CODING_EOL_CRLF on DOS/Windows, and CODING_EOL_CR on Mac. */ | |
358 | int system_eol_type; | |
359 | ||
4ed46869 KH |
360 | #ifdef emacs |
361 | ||
4608c386 KH |
362 | Lisp_Object Vcoding_system_list, Vcoding_system_alist; |
363 | ||
364 | Lisp_Object Qcoding_system_p, Qcoding_system_error; | |
4ed46869 | 365 | |
d46c5b12 KH |
366 | /* Coding system emacs-mule and raw-text are for converting only |
367 | end-of-line format. */ | |
368 | Lisp_Object Qemacs_mule, Qraw_text; | |
9ce27fde | 369 | |
4ed46869 KH |
370 | /* Coding-systems are handed between Emacs Lisp programs and C internal |
371 | routines by the following three variables. */ | |
372 | /* Coding-system for reading files and receiving data from process. */ | |
373 | Lisp_Object Vcoding_system_for_read; | |
374 | /* Coding-system for writing files and sending data to process. */ | |
375 | Lisp_Object Vcoding_system_for_write; | |
376 | /* Coding-system actually used in the latest I/O. */ | |
377 | Lisp_Object Vlast_coding_system_used; | |
378 | ||
c4825358 | 379 | /* A vector of length 256 which contains information about special |
94487c4e | 380 | Latin codes (especially for dealing with Microsoft codes). */ |
3f003981 | 381 | Lisp_Object Vlatin_extra_code_table; |
c4825358 | 382 | |
9ce27fde KH |
383 | /* Flag to inhibit code conversion of end-of-line format. */ |
384 | int inhibit_eol_conversion; | |
385 | ||
74383408 KH |
386 | /* Flag to inhibit ISO2022 escape sequence detection. */ |
387 | int inhibit_iso_escape_detection; | |
388 | ||
ed29121d EZ |
389 | /* Flag to make buffer-file-coding-system inherit from process-coding. */ |
390 | int inherit_process_coding_system; | |
391 | ||
c4825358 | 392 | /* Coding system to be used to encode text for terminal display. */ |
4ed46869 KH |
393 | struct coding_system terminal_coding; |
394 | ||
c4825358 KH |
395 | /* Coding system to be used to encode text for terminal display when |
396 | terminal coding system is nil. */ | |
397 | struct coding_system safe_terminal_coding; | |
398 | ||
399 | /* Coding system of what is sent from terminal keyboard. */ | |
4ed46869 KH |
400 | struct coding_system keyboard_coding; |
401 | ||
6bc51348 KH |
402 | /* Default coding system to be used to write a file. */ |
403 | struct coding_system default_buffer_file_coding; | |
404 | ||
02ba4723 KH |
405 | Lisp_Object Vfile_coding_system_alist; |
406 | Lisp_Object Vprocess_coding_system_alist; | |
407 | Lisp_Object Vnetwork_coding_system_alist; | |
4ed46869 | 408 | |
68c45bf0 PE |
409 | Lisp_Object Vlocale_coding_system; |
410 | ||
4ed46869 KH |
411 | #endif /* emacs */ |
412 | ||
d46c5b12 | 413 | Lisp_Object Qcoding_category, Qcoding_category_index; |
4ed46869 KH |
414 | |
415 | /* List of symbols `coding-category-xxx' ordered by priority. */ | |
416 | Lisp_Object Vcoding_category_list; | |
417 | ||
d46c5b12 KH |
418 | /* Table of coding categories (Lisp symbols). */ |
419 | Lisp_Object Vcoding_category_table; | |
4ed46869 KH |
420 | |
421 | /* Table of names of symbol for each coding-category. */ | |
422 | char *coding_category_name[CODING_CATEGORY_IDX_MAX] = { | |
0ef69138 | 423 | "coding-category-emacs-mule", |
4ed46869 KH |
424 | "coding-category-sjis", |
425 | "coding-category-iso-7", | |
d46c5b12 | 426 | "coding-category-iso-7-tight", |
4ed46869 KH |
427 | "coding-category-iso-8-1", |
428 | "coding-category-iso-8-2", | |
7717c392 KH |
429 | "coding-category-iso-7-else", |
430 | "coding-category-iso-8-else", | |
89fa8b36 | 431 | "coding-category-ccl", |
4ed46869 | 432 | "coding-category-big5", |
fa42c37f KH |
433 | "coding-category-utf-8", |
434 | "coding-category-utf-16-be", | |
435 | "coding-category-utf-16-le", | |
27901516 | 436 | "coding-category-raw-text", |
89fa8b36 | 437 | "coding-category-binary" |
4ed46869 KH |
438 | }; |
439 | ||
66cfb530 | 440 | /* Table of pointers to coding systems corresponding to each coding |
d46c5b12 KH |
441 | categories. */ |
442 | struct coding_system *coding_system_table[CODING_CATEGORY_IDX_MAX]; | |
443 | ||
66cfb530 KH |
444 | /* Table of coding category masks. Nth element is a mask for a coding |
445 | cateogry of which priority is Nth. */ | |
446 | static | |
447 | int coding_priorities[CODING_CATEGORY_IDX_MAX]; | |
448 | ||
f967223b KH |
449 | /* Flag to tell if we look up translation table on character code |
450 | conversion. */ | |
84fbb8a0 | 451 | Lisp_Object Venable_character_translation; |
f967223b KH |
452 | /* Standard translation table to look up on decoding (reading). */ |
453 | Lisp_Object Vstandard_translation_table_for_decode; | |
454 | /* Standard translation table to look up on encoding (writing). */ | |
455 | Lisp_Object Vstandard_translation_table_for_encode; | |
84fbb8a0 | 456 | |
f967223b KH |
457 | Lisp_Object Qtranslation_table; |
458 | Lisp_Object Qtranslation_table_id; | |
459 | Lisp_Object Qtranslation_table_for_decode; | |
460 | Lisp_Object Qtranslation_table_for_encode; | |
4ed46869 KH |
461 | |
462 | /* Alist of charsets vs revision number. */ | |
463 | Lisp_Object Vcharset_revision_alist; | |
464 | ||
02ba4723 KH |
465 | /* Default coding systems used for process I/O. */ |
466 | Lisp_Object Vdefault_process_coding_system; | |
467 | ||
b843d1ae KH |
468 | /* Global flag to tell that we can't call post-read-conversion and |
469 | pre-write-conversion functions. Usually the value is zero, but it | |
470 | is set to 1 temporarily while such functions are running. This is | |
471 | to avoid infinite recursive call. */ | |
472 | static int inhibit_pre_post_conversion; | |
473 | ||
05e6f5dc KH |
474 | /* Char-table containing safe coding systems of each character. */ |
475 | Lisp_Object Vchar_coding_system_table; | |
476 | Lisp_Object Qchar_coding_system; | |
477 | ||
478 | /* Return `safe-chars' property of coding system CODING. Don't check | |
479 | validity of CODING. */ | |
480 | ||
481 | Lisp_Object | |
482 | coding_safe_chars (coding) | |
483 | struct coding_system *coding; | |
484 | { | |
485 | Lisp_Object coding_spec, plist, safe_chars; | |
486 | ||
487 | coding_spec = Fget (coding->symbol, Qcoding_system); | |
488 | plist = XVECTOR (coding_spec)->contents[3]; | |
489 | safe_chars = Fplist_get (XVECTOR (coding_spec)->contents[3], Qsafe_chars); | |
490 | return (CHAR_TABLE_P (safe_chars) ? safe_chars : Qt); | |
491 | } | |
492 | ||
493 | #define CODING_SAFE_CHAR_P(safe_chars, c) \ | |
494 | (EQ (safe_chars, Qt) || !NILP (CHAR_TABLE_REF (safe_chars, c))) | |
495 | ||
4ed46869 | 496 | \f |
0ef69138 | 497 | /*** 2. Emacs internal format (emacs-mule) handlers ***/ |
4ed46869 KH |
498 | |
499 | /* Emacs' internal format for encoding multiple character sets is a | |
f4dee582 | 500 | kind of multi-byte encoding, i.e. characters are encoded by |
b73bfc1c KH |
501 | variable-length sequences of one-byte codes. |
502 | ||
503 | ASCII characters and control characters (e.g. `tab', `newline') are | |
504 | represented by one-byte sequences which are their ASCII codes, in | |
505 | the range 0x00 through 0x7F. | |
506 | ||
507 | 8-bit characters of the range 0x80..0x9F are represented by | |
508 | two-byte sequences of LEADING_CODE_8_BIT_CONTROL and (their 8-bit | |
509 | code + 0x20). | |
510 | ||
511 | 8-bit characters of the range 0xA0..0xFF are represented by | |
512 | one-byte sequences which are their 8-bit code. | |
513 | ||
514 | The other characters are represented by a sequence of `base | |
515 | leading-code', optional `extended leading-code', and one or two | |
516 | `position-code's. The length of the sequence is determined by the | |
517 | base leading-code. Leading-code takes the range 0x80 through 0x9F, | |
518 | whereas extended leading-code and position-code take the range 0xA0 | |
519 | through 0xFF. See `charset.h' for more details about leading-code | |
520 | and position-code. | |
f4dee582 | 521 | |
4ed46869 | 522 | --- CODE RANGE of Emacs' internal format --- |
b73bfc1c KH |
523 | character set range |
524 | ------------- ----- | |
525 | ascii 0x00..0x7F | |
526 | eight-bit-control LEADING_CODE_8_BIT_CONTROL + 0xA0..0xBF | |
527 | eight-bit-graphic 0xA0..0xBF | |
528 | ELSE 0x81..0x9F + [0xA0..0xFF]+ | |
4ed46869 KH |
529 | --------------------------------------------- |
530 | ||
531 | */ | |
532 | ||
533 | enum emacs_code_class_type emacs_code_class[256]; | |
534 | ||
4ed46869 KH |
535 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
536 | Check if a text is encoded in Emacs' internal format. If it is, | |
d46c5b12 | 537 | return CODING_CATEGORY_MASK_EMACS_MULE, else return 0. */ |
4ed46869 KH |
538 | |
539 | int | |
0ef69138 | 540 | detect_coding_emacs_mule (src, src_end) |
b73bfc1c | 541 | unsigned char *src, *src_end; |
4ed46869 KH |
542 | { |
543 | unsigned char c; | |
544 | int composing = 0; | |
b73bfc1c KH |
545 | /* Dummy for ONE_MORE_BYTE. */ |
546 | struct coding_system dummy_coding; | |
547 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 548 | |
b73bfc1c | 549 | while (1) |
4ed46869 | 550 | { |
b73bfc1c | 551 | ONE_MORE_BYTE (c); |
4ed46869 KH |
552 | |
553 | if (composing) | |
554 | { | |
555 | if (c < 0xA0) | |
556 | composing = 0; | |
b73bfc1c KH |
557 | else if (c == 0xA0) |
558 | { | |
559 | ONE_MORE_BYTE (c); | |
560 | c &= 0x7F; | |
561 | } | |
4ed46869 KH |
562 | else |
563 | c -= 0x20; | |
564 | } | |
565 | ||
b73bfc1c | 566 | if (c < 0x20) |
4ed46869 | 567 | { |
4ed46869 KH |
568 | if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) |
569 | return 0; | |
b73bfc1c KH |
570 | } |
571 | else if (c >= 0x80 && c < 0xA0) | |
572 | { | |
573 | if (c == 0x80) | |
574 | /* Old leading code for a composite character. */ | |
575 | composing = 1; | |
576 | else | |
577 | { | |
578 | unsigned char *src_base = src - 1; | |
579 | int bytes; | |
4ed46869 | 580 | |
b73bfc1c KH |
581 | if (!UNIBYTE_STR_AS_MULTIBYTE_P (src_base, src_end - src_base, |
582 | bytes)) | |
583 | return 0; | |
584 | src = src_base + bytes; | |
585 | } | |
586 | } | |
587 | } | |
588 | label_end_of_loop: | |
589 | return CODING_CATEGORY_MASK_EMACS_MULE; | |
590 | } | |
4ed46869 | 591 | |
4ed46869 | 592 | |
b73bfc1c | 593 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
4ed46869 | 594 | |
b73bfc1c KH |
595 | static void |
596 | decode_coding_emacs_mule (coding, source, destination, src_bytes, dst_bytes) | |
597 | struct coding_system *coding; | |
598 | unsigned char *source, *destination; | |
599 | int src_bytes, dst_bytes; | |
600 | { | |
601 | unsigned char *src = source; | |
602 | unsigned char *src_end = source + src_bytes; | |
603 | unsigned char *dst = destination; | |
604 | unsigned char *dst_end = destination + dst_bytes; | |
605 | /* SRC_BASE remembers the start position in source in each loop. | |
606 | The loop will be exited when there's not enough source code, or | |
607 | when there's not enough destination area to produce a | |
608 | character. */ | |
609 | unsigned char *src_base; | |
4ed46869 | 610 | |
b73bfc1c | 611 | coding->produced_char = 0; |
8a33cf7b | 612 | while ((src_base = src) < src_end) |
b73bfc1c KH |
613 | { |
614 | unsigned char tmp[MAX_MULTIBYTE_LENGTH], *p; | |
615 | int bytes; | |
ec6d2bb8 | 616 | |
4af310db EZ |
617 | if (*src == '\r') |
618 | { | |
2bcdf662 | 619 | int c = *src++; |
4af310db | 620 | |
4af310db EZ |
621 | if (coding->eol_type == CODING_EOL_CR) |
622 | c = '\n'; | |
623 | else if (coding->eol_type == CODING_EOL_CRLF) | |
624 | { | |
625 | ONE_MORE_BYTE (c); | |
626 | if (c != '\n') | |
627 | { | |
628 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
629 | { | |
630 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
631 | goto label_end_of_loop; | |
632 | } | |
633 | src--; | |
634 | c = '\r'; | |
635 | } | |
636 | } | |
637 | *dst++ = c; | |
638 | coding->produced_char++; | |
639 | continue; | |
640 | } | |
641 | else if (*src == '\n') | |
642 | { | |
643 | if ((coding->eol_type == CODING_EOL_CR | |
644 | || coding->eol_type == CODING_EOL_CRLF) | |
645 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
646 | { | |
647 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
648 | goto label_end_of_loop; | |
649 | } | |
650 | *dst++ = *src++; | |
651 | coding->produced_char++; | |
652 | continue; | |
653 | } | |
654 | else if (UNIBYTE_STR_AS_MULTIBYTE_P (src, src_end - src, bytes)) | |
b73bfc1c KH |
655 | { |
656 | p = src; | |
657 | src += bytes; | |
658 | } | |
659 | else | |
660 | { | |
661 | bytes = CHAR_STRING (*src, tmp); | |
662 | p = tmp; | |
663 | src++; | |
664 | } | |
665 | if (dst + bytes >= (dst_bytes ? dst_end : src)) | |
666 | { | |
667 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
4ed46869 KH |
668 | break; |
669 | } | |
b73bfc1c KH |
670 | while (bytes--) *dst++ = *p++; |
671 | coding->produced_char++; | |
4ed46869 | 672 | } |
4af310db | 673 | label_end_of_loop: |
b73bfc1c KH |
674 | coding->consumed = coding->consumed_char = src_base - source; |
675 | coding->produced = dst - destination; | |
4ed46869 KH |
676 | } |
677 | ||
b73bfc1c KH |
678 | #define encode_coding_emacs_mule(coding, source, destination, src_bytes, dst_bytes) \ |
679 | encode_eol (coding, source, destination, src_bytes, dst_bytes) | |
680 | ||
681 | ||
4ed46869 KH |
682 | \f |
683 | /*** 3. ISO2022 handlers ***/ | |
684 | ||
685 | /* The following note describes the coding system ISO2022 briefly. | |
39787efd KH |
686 | Since the intention of this note is to help understand the |
687 | functions in this file, some parts are NOT ACCURATE or OVERLY | |
688 | SIMPLIFIED. For thorough understanding, please refer to the | |
4ed46869 KH |
689 | original document of ISO2022. |
690 | ||
691 | ISO2022 provides many mechanisms to encode several character sets | |
39787efd KH |
692 | in 7-bit and 8-bit environments. For 7-bite environments, all text |
693 | is encoded using bytes less than 128. This may make the encoded | |
694 | text a little bit longer, but the text passes more easily through | |
695 | several gateways, some of which strip off MSB (Most Signigant Bit). | |
b73bfc1c | 696 | |
39787efd | 697 | There are two kinds of character sets: control character set and |
4ed46869 KH |
698 | graphic character set. The former contains control characters such |
699 | as `newline' and `escape' to provide control functions (control | |
39787efd KH |
700 | functions are also provided by escape sequences). The latter |
701 | contains graphic characters such as 'A' and '-'. Emacs recognizes | |
4ed46869 KH |
702 | two control character sets and many graphic character sets. |
703 | ||
704 | Graphic character sets are classified into one of the following | |
39787efd KH |
705 | four classes, according to the number of bytes (DIMENSION) and |
706 | number of characters in one dimension (CHARS) of the set: | |
707 | - DIMENSION1_CHARS94 | |
708 | - DIMENSION1_CHARS96 | |
709 | - DIMENSION2_CHARS94 | |
710 | - DIMENSION2_CHARS96 | |
711 | ||
712 | In addition, each character set is assigned an identification tag, | |
713 | unique for each set, called "final character" (denoted as <F> | |
714 | hereafter). The <F> of each character set is decided by ECMA(*) | |
715 | when it is registered in ISO. The code range of <F> is 0x30..0x7F | |
716 | (0x30..0x3F are for private use only). | |
4ed46869 KH |
717 | |
718 | Note (*): ECMA = European Computer Manufacturers Association | |
719 | ||
720 | Here are examples of graphic character set [NAME(<F>)]: | |
721 | o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ... | |
722 | o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ... | |
723 | o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ... | |
724 | o DIMENSION2_CHARS96 -- none for the moment | |
725 | ||
39787efd | 726 | A code area (1 byte=8 bits) is divided into 4 areas, C0, GL, C1, and GR. |
4ed46869 KH |
727 | C0 [0x00..0x1F] -- control character plane 0 |
728 | GL [0x20..0x7F] -- graphic character plane 0 | |
729 | C1 [0x80..0x9F] -- control character plane 1 | |
730 | GR [0xA0..0xFF] -- graphic character plane 1 | |
731 | ||
732 | A control character set is directly designated and invoked to C0 or | |
39787efd KH |
733 | C1 by an escape sequence. The most common case is that: |
734 | - ISO646's control character set is designated/invoked to C0, and | |
735 | - ISO6429's control character set is designated/invoked to C1, | |
736 | and usually these designations/invocations are omitted in encoded | |
737 | text. In a 7-bit environment, only C0 can be used, and a control | |
738 | character for C1 is encoded by an appropriate escape sequence to | |
739 | fit into the environment. All control characters for C1 are | |
740 | defined to have corresponding escape sequences. | |
4ed46869 KH |
741 | |
742 | A graphic character set is at first designated to one of four | |
743 | graphic registers (G0 through G3), then these graphic registers are | |
744 | invoked to GL or GR. These designations and invocations can be | |
745 | done independently. The most common case is that G0 is invoked to | |
39787efd KH |
746 | GL, G1 is invoked to GR, and ASCII is designated to G0. Usually |
747 | these invocations and designations are omitted in encoded text. | |
748 | In a 7-bit environment, only GL can be used. | |
4ed46869 | 749 | |
39787efd KH |
750 | When a graphic character set of CHARS94 is invoked to GL, codes |
751 | 0x20 and 0x7F of the GL area work as control characters SPACE and | |
752 | DEL respectively, and codes 0xA0 and 0xFF of the GR area should not | |
753 | be used. | |
4ed46869 KH |
754 | |
755 | There are two ways of invocation: locking-shift and single-shift. | |
756 | With locking-shift, the invocation lasts until the next different | |
39787efd KH |
757 | invocation, whereas with single-shift, the invocation affects the |
758 | following character only and doesn't affect the locking-shift | |
759 | state. Invocations are done by the following control characters or | |
760 | escape sequences: | |
4ed46869 KH |
761 | |
762 | ---------------------------------------------------------------------- | |
39787efd | 763 | abbrev function cntrl escape seq description |
4ed46869 | 764 | ---------------------------------------------------------------------- |
39787efd KH |
765 | SI/LS0 (shift-in) 0x0F none invoke G0 into GL |
766 | SO/LS1 (shift-out) 0x0E none invoke G1 into GL | |
767 | LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL | |
768 | LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL | |
769 | LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*) | |
770 | LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*) | |
771 | LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*) | |
772 | SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char | |
773 | SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char | |
4ed46869 | 774 | ---------------------------------------------------------------------- |
39787efd KH |
775 | (*) These are not used by any known coding system. |
776 | ||
777 | Control characters for these functions are defined by macros | |
778 | ISO_CODE_XXX in `coding.h'. | |
4ed46869 | 779 | |
39787efd | 780 | Designations are done by the following escape sequences: |
4ed46869 KH |
781 | ---------------------------------------------------------------------- |
782 | escape sequence description | |
783 | ---------------------------------------------------------------------- | |
784 | ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0 | |
785 | ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1 | |
786 | ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2 | |
787 | ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3 | |
788 | ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*) | |
789 | ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1 | |
790 | ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2 | |
791 | ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3 | |
792 | ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**) | |
793 | ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1 | |
794 | ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2 | |
795 | ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3 | |
796 | ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*) | |
797 | ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1 | |
798 | ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2 | |
799 | ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3 | |
800 | ---------------------------------------------------------------------- | |
801 | ||
802 | In this list, "DIMENSION1_CHARS94<F>" means a graphic character set | |
39787efd | 803 | of dimension 1, chars 94, and final character <F>, etc... |
4ed46869 KH |
804 | |
805 | Note (*): Although these designations are not allowed in ISO2022, | |
806 | Emacs accepts them on decoding, and produces them on encoding | |
39787efd | 807 | CHARS96 character sets in a coding system which is characterized as |
4ed46869 KH |
808 | 7-bit environment, non-locking-shift, and non-single-shift. |
809 | ||
810 | Note (**): If <F> is '@', 'A', or 'B', the intermediate character | |
39787efd | 811 | '(' can be omitted. We refer to this as "short-form" hereafter. |
4ed46869 KH |
812 | |
813 | Now you may notice that there are a lot of ways for encoding the | |
39787efd KH |
814 | same multilingual text in ISO2022. Actually, there exist many |
815 | coding systems such as Compound Text (used in X11's inter client | |
816 | communication, ISO-2022-JP (used in Japanese internet), ISO-2022-KR | |
817 | (used in Korean internet), EUC (Extended UNIX Code, used in Asian | |
4ed46869 KH |
818 | localized platforms), and all of these are variants of ISO2022. |
819 | ||
820 | In addition to the above, Emacs handles two more kinds of escape | |
821 | sequences: ISO6429's direction specification and Emacs' private | |
822 | sequence for specifying character composition. | |
823 | ||
39787efd | 824 | ISO6429's direction specification takes the following form: |
4ed46869 KH |
825 | o CSI ']' -- end of the current direction |
826 | o CSI '0' ']' -- end of the current direction | |
827 | o CSI '1' ']' -- start of left-to-right text | |
828 | o CSI '2' ']' -- start of right-to-left text | |
829 | The control character CSI (0x9B: control sequence introducer) is | |
39787efd KH |
830 | abbreviated to the escape sequence ESC '[' in a 7-bit environment. |
831 | ||
832 | Character composition specification takes the following form: | |
ec6d2bb8 KH |
833 | o ESC '0' -- start relative composition |
834 | o ESC '1' -- end composition | |
835 | o ESC '2' -- start rule-base composition (*) | |
836 | o ESC '3' -- start relative composition with alternate chars (**) | |
837 | o ESC '4' -- start rule-base composition with alternate chars (**) | |
b73bfc1c KH |
838 | Since these are not standard escape sequences of any ISO standard, |
839 | the use of them for these meaning is restricted to Emacs only. | |
ec6d2bb8 | 840 | |
b73bfc1c KH |
841 | (*) This form is used only in Emacs 20.5 and the older versions, |
842 | but the newer versions can safely decode it. | |
843 | (**) This form is used only in Emacs 21.1 and the newer versions, | |
844 | and the older versions can't decode it. | |
ec6d2bb8 | 845 | |
b73bfc1c KH |
846 | Here's a list of examples usages of these composition escape |
847 | sequences (categorized by `enum composition_method'). | |
ec6d2bb8 | 848 | |
b73bfc1c | 849 | COMPOSITION_RELATIVE: |
ec6d2bb8 | 850 | ESC 0 CHAR [ CHAR ] ESC 1 |
b73bfc1c | 851 | COMPOSITOIN_WITH_RULE: |
ec6d2bb8 | 852 | ESC 2 CHAR [ RULE CHAR ] ESC 1 |
b73bfc1c | 853 | COMPOSITION_WITH_ALTCHARS: |
ec6d2bb8 | 854 | ESC 3 ALTCHAR [ ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 |
b73bfc1c | 855 | COMPOSITION_WITH_RULE_ALTCHARS: |
ec6d2bb8 | 856 | ESC 4 ALTCHAR [ RULE ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 */ |
4ed46869 KH |
857 | |
858 | enum iso_code_class_type iso_code_class[256]; | |
859 | ||
05e6f5dc KH |
860 | #define CHARSET_OK(idx, charset, c) \ |
861 | (coding_system_table[idx] \ | |
862 | && (charset == CHARSET_ASCII \ | |
863 | || (safe_chars = coding_safe_chars (coding_system_table[idx]), \ | |
864 | CODING_SAFE_CHAR_P (safe_chars, c))) \ | |
865 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding_system_table[idx], \ | |
866 | charset) \ | |
867 | != CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION)) | |
d46c5b12 KH |
868 | |
869 | #define SHIFT_OUT_OK(idx) \ | |
870 | (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding_system_table[idx], 1) >= 0) | |
871 | ||
4ed46869 KH |
872 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
873 | Check if a text is encoded in ISO2022. If it is, returns an | |
874 | integer in which appropriate flag bits any of: | |
875 | CODING_CATEGORY_MASK_ISO_7 | |
d46c5b12 | 876 | CODING_CATEGORY_MASK_ISO_7_TIGHT |
4ed46869 KH |
877 | CODING_CATEGORY_MASK_ISO_8_1 |
878 | CODING_CATEGORY_MASK_ISO_8_2 | |
7717c392 KH |
879 | CODING_CATEGORY_MASK_ISO_7_ELSE |
880 | CODING_CATEGORY_MASK_ISO_8_ELSE | |
4ed46869 KH |
881 | are set. If a code which should never appear in ISO2022 is found, |
882 | returns 0. */ | |
883 | ||
884 | int | |
885 | detect_coding_iso2022 (src, src_end) | |
886 | unsigned char *src, *src_end; | |
887 | { | |
d46c5b12 KH |
888 | int mask = CODING_CATEGORY_MASK_ISO; |
889 | int mask_found = 0; | |
f46869e4 | 890 | int reg[4], shift_out = 0, single_shifting = 0; |
d46c5b12 | 891 | int c, c1, i, charset; |
b73bfc1c KH |
892 | /* Dummy for ONE_MORE_BYTE. */ |
893 | struct coding_system dummy_coding; | |
894 | struct coding_system *coding = &dummy_coding; | |
05e6f5dc | 895 | Lisp_Object safe_chars; |
3f003981 | 896 | |
d46c5b12 | 897 | reg[0] = CHARSET_ASCII, reg[1] = reg[2] = reg[3] = -1; |
3f003981 | 898 | while (mask && src < src_end) |
4ed46869 | 899 | { |
b73bfc1c | 900 | ONE_MORE_BYTE (c); |
4ed46869 KH |
901 | switch (c) |
902 | { | |
903 | case ISO_CODE_ESC: | |
74383408 KH |
904 | if (inhibit_iso_escape_detection) |
905 | break; | |
f46869e4 | 906 | single_shifting = 0; |
b73bfc1c | 907 | ONE_MORE_BYTE (c); |
d46c5b12 | 908 | if (c >= '(' && c <= '/') |
4ed46869 | 909 | { |
bf9cdd4e | 910 | /* Designation sequence for a charset of dimension 1. */ |
b73bfc1c | 911 | ONE_MORE_BYTE (c1); |
d46c5b12 KH |
912 | if (c1 < ' ' || c1 >= 0x80 |
913 | || (charset = iso_charset_table[0][c >= ','][c1]) < 0) | |
914 | /* Invalid designation sequence. Just ignore. */ | |
915 | break; | |
916 | reg[(c - '(') % 4] = charset; | |
bf9cdd4e KH |
917 | } |
918 | else if (c == '$') | |
919 | { | |
920 | /* Designation sequence for a charset of dimension 2. */ | |
b73bfc1c | 921 | ONE_MORE_BYTE (c); |
bf9cdd4e KH |
922 | if (c >= '@' && c <= 'B') |
923 | /* Designation for JISX0208.1978, GB2312, or JISX0208. */ | |
d46c5b12 | 924 | reg[0] = charset = iso_charset_table[1][0][c]; |
bf9cdd4e | 925 | else if (c >= '(' && c <= '/') |
bcf26d6a | 926 | { |
b73bfc1c | 927 | ONE_MORE_BYTE (c1); |
d46c5b12 KH |
928 | if (c1 < ' ' || c1 >= 0x80 |
929 | || (charset = iso_charset_table[1][c >= ','][c1]) < 0) | |
930 | /* Invalid designation sequence. Just ignore. */ | |
931 | break; | |
932 | reg[(c - '(') % 4] = charset; | |
bcf26d6a | 933 | } |
bf9cdd4e | 934 | else |
d46c5b12 KH |
935 | /* Invalid designation sequence. Just ignore. */ |
936 | break; | |
937 | } | |
ae9ff118 | 938 | else if (c == 'N' || c == 'O') |
d46c5b12 | 939 | { |
ae9ff118 KH |
940 | /* ESC <Fe> for SS2 or SS3. */ |
941 | mask &= CODING_CATEGORY_MASK_ISO_7_ELSE; | |
d46c5b12 | 942 | break; |
4ed46869 | 943 | } |
ec6d2bb8 KH |
944 | else if (c >= '0' && c <= '4') |
945 | { | |
946 | /* ESC <Fp> for start/end composition. */ | |
947 | mask_found |= CODING_CATEGORY_MASK_ISO; | |
948 | break; | |
949 | } | |
bf9cdd4e | 950 | else |
d46c5b12 KH |
951 | /* Invalid escape sequence. Just ignore. */ |
952 | break; | |
953 | ||
954 | /* We found a valid designation sequence for CHARSET. */ | |
955 | mask &= ~CODING_CATEGORY_MASK_ISO_8BIT; | |
05e6f5dc KH |
956 | c = MAKE_CHAR (charset, 0, 0); |
957 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7, charset, c)) | |
d46c5b12 KH |
958 | mask_found |= CODING_CATEGORY_MASK_ISO_7; |
959 | else | |
960 | mask &= ~CODING_CATEGORY_MASK_ISO_7; | |
05e6f5dc | 961 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_TIGHT, charset, c)) |
d46c5b12 KH |
962 | mask_found |= CODING_CATEGORY_MASK_ISO_7_TIGHT; |
963 | else | |
964 | mask &= ~CODING_CATEGORY_MASK_ISO_7_TIGHT; | |
05e6f5dc | 965 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_ELSE, charset, c)) |
ae9ff118 KH |
966 | mask_found |= CODING_CATEGORY_MASK_ISO_7_ELSE; |
967 | else | |
d46c5b12 | 968 | mask &= ~CODING_CATEGORY_MASK_ISO_7_ELSE; |
05e6f5dc | 969 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_8_ELSE, charset, c)) |
ae9ff118 KH |
970 | mask_found |= CODING_CATEGORY_MASK_ISO_8_ELSE; |
971 | else | |
d46c5b12 | 972 | mask &= ~CODING_CATEGORY_MASK_ISO_8_ELSE; |
4ed46869 KH |
973 | break; |
974 | ||
4ed46869 | 975 | case ISO_CODE_SO: |
74383408 KH |
976 | if (inhibit_iso_escape_detection) |
977 | break; | |
f46869e4 | 978 | single_shifting = 0; |
d46c5b12 KH |
979 | if (shift_out == 0 |
980 | && (reg[1] >= 0 | |
981 | || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_7_ELSE) | |
982 | || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_8_ELSE))) | |
983 | { | |
984 | /* Locking shift out. */ | |
985 | mask &= ~CODING_CATEGORY_MASK_ISO_7BIT; | |
986 | mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT; | |
987 | } | |
e0e989f6 KH |
988 | break; |
989 | ||
d46c5b12 | 990 | case ISO_CODE_SI: |
74383408 KH |
991 | if (inhibit_iso_escape_detection) |
992 | break; | |
f46869e4 | 993 | single_shifting = 0; |
d46c5b12 KH |
994 | if (shift_out == 1) |
995 | { | |
996 | /* Locking shift in. */ | |
997 | mask &= ~CODING_CATEGORY_MASK_ISO_7BIT; | |
998 | mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT; | |
999 | } | |
1000 | break; | |
1001 | ||
4ed46869 | 1002 | case ISO_CODE_CSI: |
f46869e4 | 1003 | single_shifting = 0; |
4ed46869 KH |
1004 | case ISO_CODE_SS2: |
1005 | case ISO_CODE_SS3: | |
3f003981 KH |
1006 | { |
1007 | int newmask = CODING_CATEGORY_MASK_ISO_8_ELSE; | |
1008 | ||
74383408 KH |
1009 | if (inhibit_iso_escape_detection) |
1010 | break; | |
70c22245 KH |
1011 | if (c != ISO_CODE_CSI) |
1012 | { | |
d46c5b12 KH |
1013 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1014 | & CODING_FLAG_ISO_SINGLE_SHIFT) | |
70c22245 | 1015 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1016 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1017 | & CODING_FLAG_ISO_SINGLE_SHIFT) | |
70c22245 | 1018 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
f46869e4 | 1019 | single_shifting = 1; |
70c22245 | 1020 | } |
3f003981 KH |
1021 | if (VECTORP (Vlatin_extra_code_table) |
1022 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
1023 | { | |
d46c5b12 KH |
1024 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1025 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 | 1026 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1027 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1028 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 KH |
1029 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
1030 | } | |
1031 | mask &= newmask; | |
d46c5b12 | 1032 | mask_found |= newmask; |
3f003981 KH |
1033 | } |
1034 | break; | |
4ed46869 KH |
1035 | |
1036 | default: | |
1037 | if (c < 0x80) | |
f46869e4 KH |
1038 | { |
1039 | single_shifting = 0; | |
1040 | break; | |
1041 | } | |
4ed46869 | 1042 | else if (c < 0xA0) |
c4825358 | 1043 | { |
f46869e4 | 1044 | single_shifting = 0; |
3f003981 KH |
1045 | if (VECTORP (Vlatin_extra_code_table) |
1046 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
c4825358 | 1047 | { |
3f003981 KH |
1048 | int newmask = 0; |
1049 | ||
d46c5b12 KH |
1050 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1051 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 | 1052 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1053 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1054 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 KH |
1055 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
1056 | mask &= newmask; | |
d46c5b12 | 1057 | mask_found |= newmask; |
c4825358 | 1058 | } |
3f003981 KH |
1059 | else |
1060 | return 0; | |
c4825358 | 1061 | } |
4ed46869 KH |
1062 | else |
1063 | { | |
d46c5b12 | 1064 | mask &= ~(CODING_CATEGORY_MASK_ISO_7BIT |
7717c392 | 1065 | | CODING_CATEGORY_MASK_ISO_7_ELSE); |
d46c5b12 | 1066 | mask_found |= CODING_CATEGORY_MASK_ISO_8_1; |
f46869e4 KH |
1067 | /* Check the length of succeeding codes of the range |
1068 | 0xA0..0FF. If the byte length is odd, we exclude | |
1069 | CODING_CATEGORY_MASK_ISO_8_2. We can check this only | |
1070 | when we are not single shifting. */ | |
b73bfc1c KH |
1071 | if (!single_shifting |
1072 | && mask & CODING_CATEGORY_MASK_ISO_8_2) | |
f46869e4 | 1073 | { |
e17de821 | 1074 | int i = 1; |
b73bfc1c KH |
1075 | while (src < src_end) |
1076 | { | |
1077 | ONE_MORE_BYTE (c); | |
1078 | if (c < 0xA0) | |
1079 | break; | |
1080 | i++; | |
1081 | } | |
1082 | ||
1083 | if (i & 1 && src < src_end) | |
f46869e4 KH |
1084 | mask &= ~CODING_CATEGORY_MASK_ISO_8_2; |
1085 | else | |
1086 | mask_found |= CODING_CATEGORY_MASK_ISO_8_2; | |
1087 | } | |
4ed46869 KH |
1088 | } |
1089 | break; | |
1090 | } | |
1091 | } | |
b73bfc1c | 1092 | label_end_of_loop: |
d46c5b12 | 1093 | return (mask & mask_found); |
4ed46869 KH |
1094 | } |
1095 | ||
b73bfc1c KH |
1096 | /* Decode a character of which charset is CHARSET, the 1st position |
1097 | code is C1, the 2nd position code is C2, and return the decoded | |
1098 | character code. If the variable `translation_table' is non-nil, | |
1099 | returned the translated code. */ | |
ec6d2bb8 | 1100 | |
b73bfc1c KH |
1101 | #define DECODE_ISO_CHARACTER(charset, c1, c2) \ |
1102 | (NILP (translation_table) \ | |
1103 | ? MAKE_CHAR (charset, c1, c2) \ | |
1104 | : translate_char (translation_table, -1, charset, c1, c2)) | |
4ed46869 KH |
1105 | |
1106 | /* Set designation state into CODING. */ | |
d46c5b12 KH |
1107 | #define DECODE_DESIGNATION(reg, dimension, chars, final_char) \ |
1108 | do { \ | |
05e6f5dc | 1109 | int charset, c; \ |
944bd420 KH |
1110 | \ |
1111 | if (final_char < '0' || final_char >= 128) \ | |
1112 | goto label_invalid_code; \ | |
1113 | charset = ISO_CHARSET_TABLE (make_number (dimension), \ | |
1114 | make_number (chars), \ | |
1115 | make_number (final_char)); \ | |
05e6f5dc | 1116 | c = MAKE_CHAR (charset, 0, 0); \ |
d46c5b12 | 1117 | if (charset >= 0 \ |
704c5781 | 1118 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) == reg \ |
05e6f5dc | 1119 | || CODING_SAFE_CHAR_P (safe_chars, c))) \ |
d46c5b12 KH |
1120 | { \ |
1121 | if (coding->spec.iso2022.last_invalid_designation_register == 0 \ | |
1122 | && reg == 0 \ | |
1123 | && charset == CHARSET_ASCII) \ | |
1124 | { \ | |
1125 | /* We should insert this designation sequence as is so \ | |
1126 | that it is surely written back to a file. */ \ | |
1127 | coding->spec.iso2022.last_invalid_designation_register = -1; \ | |
1128 | goto label_invalid_code; \ | |
1129 | } \ | |
1130 | coding->spec.iso2022.last_invalid_designation_register = -1; \ | |
1131 | if ((coding->mode & CODING_MODE_DIRECTION) \ | |
1132 | && CHARSET_REVERSE_CHARSET (charset) >= 0) \ | |
1133 | charset = CHARSET_REVERSE_CHARSET (charset); \ | |
1134 | CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \ | |
1135 | } \ | |
1136 | else \ | |
1137 | { \ | |
1138 | coding->spec.iso2022.last_invalid_designation_register = reg; \ | |
1139 | goto label_invalid_code; \ | |
1140 | } \ | |
4ed46869 KH |
1141 | } while (0) |
1142 | ||
ec6d2bb8 KH |
1143 | /* Allocate a memory block for storing information about compositions. |
1144 | The block is chained to the already allocated blocks. */ | |
d46c5b12 | 1145 | |
33fb63eb | 1146 | void |
ec6d2bb8 | 1147 | coding_allocate_composition_data (coding, char_offset) |
d46c5b12 | 1148 | struct coding_system *coding; |
ec6d2bb8 | 1149 | int char_offset; |
d46c5b12 | 1150 | { |
ec6d2bb8 KH |
1151 | struct composition_data *cmp_data |
1152 | = (struct composition_data *) xmalloc (sizeof *cmp_data); | |
1153 | ||
1154 | cmp_data->char_offset = char_offset; | |
1155 | cmp_data->used = 0; | |
1156 | cmp_data->prev = coding->cmp_data; | |
1157 | cmp_data->next = NULL; | |
1158 | if (coding->cmp_data) | |
1159 | coding->cmp_data->next = cmp_data; | |
1160 | coding->cmp_data = cmp_data; | |
1161 | coding->cmp_data_start = 0; | |
1162 | } | |
d46c5b12 | 1163 | |
ec6d2bb8 KH |
1164 | /* Record the starting position START and METHOD of one composition. */ |
1165 | ||
1166 | #define CODING_ADD_COMPOSITION_START(coding, start, method) \ | |
1167 | do { \ | |
1168 | struct composition_data *cmp_data = coding->cmp_data; \ | |
1169 | int *data = cmp_data->data + cmp_data->used; \ | |
1170 | coding->cmp_data_start = cmp_data->used; \ | |
1171 | data[0] = -1; \ | |
1172 | data[1] = cmp_data->char_offset + start; \ | |
1173 | data[3] = (int) method; \ | |
1174 | cmp_data->used += 4; \ | |
1175 | } while (0) | |
1176 | ||
1177 | /* Record the ending position END of the current composition. */ | |
1178 | ||
1179 | #define CODING_ADD_COMPOSITION_END(coding, end) \ | |
1180 | do { \ | |
1181 | struct composition_data *cmp_data = coding->cmp_data; \ | |
1182 | int *data = cmp_data->data + coding->cmp_data_start; \ | |
1183 | data[0] = cmp_data->used - coding->cmp_data_start; \ | |
1184 | data[2] = cmp_data->char_offset + end; \ | |
1185 | } while (0) | |
1186 | ||
1187 | /* Record one COMPONENT (alternate character or composition rule). */ | |
1188 | ||
1189 | #define CODING_ADD_COMPOSITION_COMPONENT(coding, component) \ | |
1190 | (coding->cmp_data->data[coding->cmp_data->used++] = component) | |
1191 | ||
1192 | /* Handle compositoin start sequence ESC 0, ESC 2, ESC 3, or ESC 4. */ | |
1193 | ||
33fb63eb KH |
1194 | #define DECODE_COMPOSITION_START(c1) \ |
1195 | do { \ | |
1196 | if (coding->composing == COMPOSITION_DISABLED) \ | |
1197 | { \ | |
1198 | *dst++ = ISO_CODE_ESC; \ | |
1199 | *dst++ = c1 & 0x7f; \ | |
1200 | coding->produced_char += 2; \ | |
1201 | } \ | |
1202 | else if (!COMPOSING_P (coding)) \ | |
1203 | { \ | |
1204 | /* This is surely the start of a composition. We must be sure \ | |
1205 | that coding->cmp_data has enough space to store the \ | |
1206 | information about the composition. If not, terminate the \ | |
1207 | current decoding loop, allocate one more memory block for \ | |
1208 | coding->cmp_data in the calller, then start the decoding \ | |
1209 | loop again. We can't allocate memory here directly because \ | |
1210 | it may cause buffer/string relocation. */ \ | |
1211 | if (!coding->cmp_data \ | |
1212 | || (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH \ | |
1213 | >= COMPOSITION_DATA_SIZE)) \ | |
1214 | { \ | |
1215 | coding->result = CODING_FINISH_INSUFFICIENT_CMP; \ | |
1216 | goto label_end_of_loop; \ | |
1217 | } \ | |
1218 | coding->composing = (c1 == '0' ? COMPOSITION_RELATIVE \ | |
1219 | : c1 == '2' ? COMPOSITION_WITH_RULE \ | |
1220 | : c1 == '3' ? COMPOSITION_WITH_ALTCHARS \ | |
1221 | : COMPOSITION_WITH_RULE_ALTCHARS); \ | |
1222 | CODING_ADD_COMPOSITION_START (coding, coding->produced_char, \ | |
1223 | coding->composing); \ | |
1224 | coding->composition_rule_follows = 0; \ | |
1225 | } \ | |
1226 | else \ | |
1227 | { \ | |
1228 | /* We are already handling a composition. If the method is \ | |
1229 | the following two, the codes following the current escape \ | |
1230 | sequence are actual characters stored in a buffer. */ \ | |
1231 | if (coding->composing == COMPOSITION_WITH_ALTCHARS \ | |
1232 | || coding->composing == COMPOSITION_WITH_RULE_ALTCHARS) \ | |
1233 | { \ | |
1234 | coding->composing = COMPOSITION_RELATIVE; \ | |
1235 | coding->composition_rule_follows = 0; \ | |
1236 | } \ | |
1237 | } \ | |
ec6d2bb8 KH |
1238 | } while (0) |
1239 | ||
1240 | /* Handle compositoin end sequence ESC 1. */ | |
1241 | ||
1242 | #define DECODE_COMPOSITION_END(c1) \ | |
1243 | do { \ | |
1244 | if (coding->composing == COMPOSITION_DISABLED) \ | |
1245 | { \ | |
1246 | *dst++ = ISO_CODE_ESC; \ | |
1247 | *dst++ = c1; \ | |
1248 | coding->produced_char += 2; \ | |
1249 | } \ | |
1250 | else \ | |
1251 | { \ | |
1252 | CODING_ADD_COMPOSITION_END (coding, coding->produced_char); \ | |
1253 | coding->composing = COMPOSITION_NO; \ | |
1254 | } \ | |
1255 | } while (0) | |
1256 | ||
1257 | /* Decode a composition rule from the byte C1 (and maybe one more byte | |
1258 | from SRC) and store one encoded composition rule in | |
1259 | coding->cmp_data. */ | |
1260 | ||
1261 | #define DECODE_COMPOSITION_RULE(c1) \ | |
1262 | do { \ | |
1263 | int rule = 0; \ | |
1264 | (c1) -= 32; \ | |
1265 | if (c1 < 81) /* old format (before ver.21) */ \ | |
1266 | { \ | |
1267 | int gref = (c1) / 9; \ | |
1268 | int nref = (c1) % 9; \ | |
1269 | if (gref == 4) gref = 10; \ | |
1270 | if (nref == 4) nref = 10; \ | |
1271 | rule = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
1272 | } \ | |
b73bfc1c | 1273 | else if (c1 < 93) /* new format (after ver.21) */ \ |
ec6d2bb8 KH |
1274 | { \ |
1275 | ONE_MORE_BYTE (c2); \ | |
1276 | rule = COMPOSITION_ENCODE_RULE (c1 - 81, c2 - 32); \ | |
1277 | } \ | |
1278 | CODING_ADD_COMPOSITION_COMPONENT (coding, rule); \ | |
1279 | coding->composition_rule_follows = 0; \ | |
1280 | } while (0) | |
88993dfd | 1281 | |
d46c5b12 | 1282 | |
4ed46869 KH |
1283 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
1284 | ||
b73bfc1c | 1285 | static void |
d46c5b12 | 1286 | decode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
1287 | struct coding_system *coding; |
1288 | unsigned char *source, *destination; | |
1289 | int src_bytes, dst_bytes; | |
4ed46869 KH |
1290 | { |
1291 | unsigned char *src = source; | |
1292 | unsigned char *src_end = source + src_bytes; | |
1293 | unsigned char *dst = destination; | |
1294 | unsigned char *dst_end = destination + dst_bytes; | |
4ed46869 KH |
1295 | /* Charsets invoked to graphic plane 0 and 1 respectively. */ |
1296 | int charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
1297 | int charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
b73bfc1c KH |
1298 | /* SRC_BASE remembers the start position in source in each loop. |
1299 | The loop will be exited when there's not enough source code | |
1300 | (within macro ONE_MORE_BYTE), or when there's not enough | |
1301 | destination area to produce a character (within macro | |
1302 | EMIT_CHAR). */ | |
1303 | unsigned char *src_base; | |
1304 | int c, charset; | |
1305 | Lisp_Object translation_table; | |
05e6f5dc KH |
1306 | Lisp_Object safe_chars; |
1307 | ||
1308 | safe_chars = coding_safe_chars (coding); | |
bdd9fb48 | 1309 | |
b73bfc1c KH |
1310 | if (NILP (Venable_character_translation)) |
1311 | translation_table = Qnil; | |
1312 | else | |
1313 | { | |
1314 | translation_table = coding->translation_table_for_decode; | |
1315 | if (NILP (translation_table)) | |
1316 | translation_table = Vstandard_translation_table_for_decode; | |
1317 | } | |
4ed46869 | 1318 | |
b73bfc1c KH |
1319 | coding->result = CODING_FINISH_NORMAL; |
1320 | ||
1321 | while (1) | |
4ed46869 | 1322 | { |
b73bfc1c KH |
1323 | int c1, c2; |
1324 | ||
1325 | src_base = src; | |
1326 | ONE_MORE_BYTE (c1); | |
4ed46869 | 1327 | |
ec6d2bb8 | 1328 | /* We produce no character or one character. */ |
4ed46869 KH |
1329 | switch (iso_code_class [c1]) |
1330 | { | |
1331 | case ISO_0x20_or_0x7F: | |
ec6d2bb8 KH |
1332 | if (COMPOSING_P (coding) && coding->composition_rule_follows) |
1333 | { | |
1334 | DECODE_COMPOSITION_RULE (c1); | |
b73bfc1c | 1335 | continue; |
ec6d2bb8 KH |
1336 | } |
1337 | if (charset0 < 0 || CHARSET_CHARS (charset0) == 94) | |
4ed46869 KH |
1338 | { |
1339 | /* This is SPACE or DEL. */ | |
b73bfc1c | 1340 | charset = CHARSET_ASCII; |
4ed46869 KH |
1341 | break; |
1342 | } | |
1343 | /* This is a graphic character, we fall down ... */ | |
1344 | ||
1345 | case ISO_graphic_plane_0: | |
ec6d2bb8 | 1346 | if (COMPOSING_P (coding) && coding->composition_rule_follows) |
b73bfc1c KH |
1347 | { |
1348 | DECODE_COMPOSITION_RULE (c1); | |
1349 | continue; | |
1350 | } | |
1351 | charset = charset0; | |
4ed46869 KH |
1352 | break; |
1353 | ||
1354 | case ISO_0xA0_or_0xFF: | |
d46c5b12 KH |
1355 | if (charset1 < 0 || CHARSET_CHARS (charset1) == 94 |
1356 | || coding->flags & CODING_FLAG_ISO_SEVEN_BITS) | |
fb88bf2d | 1357 | goto label_invalid_code; |
4ed46869 KH |
1358 | /* This is a graphic character, we fall down ... */ |
1359 | ||
1360 | case ISO_graphic_plane_1: | |
b73bfc1c | 1361 | if (charset1 < 0) |
fb88bf2d | 1362 | goto label_invalid_code; |
b73bfc1c | 1363 | charset = charset1; |
4ed46869 KH |
1364 | break; |
1365 | ||
b73bfc1c | 1366 | case ISO_control_0: |
ec6d2bb8 KH |
1367 | if (COMPOSING_P (coding)) |
1368 | DECODE_COMPOSITION_END ('1'); | |
1369 | ||
4ed46869 KH |
1370 | /* All ISO2022 control characters in this class have the |
1371 | same representation in Emacs internal format. */ | |
d46c5b12 KH |
1372 | if (c1 == '\n' |
1373 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
1374 | && (coding->eol_type == CODING_EOL_CR | |
1375 | || coding->eol_type == CODING_EOL_CRLF)) | |
1376 | { | |
b73bfc1c KH |
1377 | coding->result = CODING_FINISH_INCONSISTENT_EOL; |
1378 | goto label_end_of_loop; | |
d46c5b12 | 1379 | } |
b73bfc1c | 1380 | charset = CHARSET_ASCII; |
4ed46869 KH |
1381 | break; |
1382 | ||
b73bfc1c KH |
1383 | case ISO_control_1: |
1384 | if (COMPOSING_P (coding)) | |
1385 | DECODE_COMPOSITION_END ('1'); | |
1386 | goto label_invalid_code; | |
1387 | ||
4ed46869 | 1388 | case ISO_carriage_return: |
ec6d2bb8 KH |
1389 | if (COMPOSING_P (coding)) |
1390 | DECODE_COMPOSITION_END ('1'); | |
1391 | ||
4ed46869 | 1392 | if (coding->eol_type == CODING_EOL_CR) |
b73bfc1c | 1393 | c1 = '\n'; |
4ed46869 KH |
1394 | else if (coding->eol_type == CODING_EOL_CRLF) |
1395 | { | |
1396 | ONE_MORE_BYTE (c1); | |
b73bfc1c | 1397 | if (c1 != ISO_CODE_LF) |
4ed46869 | 1398 | { |
d46c5b12 KH |
1399 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) |
1400 | { | |
b73bfc1c KH |
1401 | coding->result = CODING_FINISH_INCONSISTENT_EOL; |
1402 | goto label_end_of_loop; | |
d46c5b12 | 1403 | } |
4ed46869 | 1404 | src--; |
b73bfc1c | 1405 | c1 = '\r'; |
4ed46869 KH |
1406 | } |
1407 | } | |
b73bfc1c | 1408 | charset = CHARSET_ASCII; |
4ed46869 KH |
1409 | break; |
1410 | ||
1411 | case ISO_shift_out: | |
d46c5b12 KH |
1412 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1413 | || CODING_SPEC_ISO_DESIGNATION (coding, 1) < 0) | |
1414 | goto label_invalid_code; | |
4ed46869 KH |
1415 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 1; |
1416 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
b73bfc1c | 1417 | continue; |
4ed46869 KH |
1418 | |
1419 | case ISO_shift_in: | |
d46c5b12 KH |
1420 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)) |
1421 | goto label_invalid_code; | |
4ed46869 KH |
1422 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; |
1423 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
b73bfc1c | 1424 | continue; |
4ed46869 KH |
1425 | |
1426 | case ISO_single_shift_2_7: | |
1427 | case ISO_single_shift_2: | |
d46c5b12 KH |
1428 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
1429 | goto label_invalid_code; | |
4ed46869 KH |
1430 | /* SS2 is handled as an escape sequence of ESC 'N' */ |
1431 | c1 = 'N'; | |
1432 | goto label_escape_sequence; | |
1433 | ||
1434 | case ISO_single_shift_3: | |
d46c5b12 KH |
1435 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
1436 | goto label_invalid_code; | |
4ed46869 KH |
1437 | /* SS2 is handled as an escape sequence of ESC 'O' */ |
1438 | c1 = 'O'; | |
1439 | goto label_escape_sequence; | |
1440 | ||
1441 | case ISO_control_sequence_introducer: | |
1442 | /* CSI is handled as an escape sequence of ESC '[' ... */ | |
1443 | c1 = '['; | |
1444 | goto label_escape_sequence; | |
1445 | ||
1446 | case ISO_escape: | |
1447 | ONE_MORE_BYTE (c1); | |
1448 | label_escape_sequence: | |
1449 | /* Escape sequences handled by Emacs are invocation, | |
1450 | designation, direction specification, and character | |
1451 | composition specification. */ | |
1452 | switch (c1) | |
1453 | { | |
1454 | case '&': /* revision of following character set */ | |
1455 | ONE_MORE_BYTE (c1); | |
1456 | if (!(c1 >= '@' && c1 <= '~')) | |
d46c5b12 | 1457 | goto label_invalid_code; |
4ed46869 KH |
1458 | ONE_MORE_BYTE (c1); |
1459 | if (c1 != ISO_CODE_ESC) | |
d46c5b12 | 1460 | goto label_invalid_code; |
4ed46869 KH |
1461 | ONE_MORE_BYTE (c1); |
1462 | goto label_escape_sequence; | |
1463 | ||
1464 | case '$': /* designation of 2-byte character set */ | |
d46c5b12 KH |
1465 | if (! (coding->flags & CODING_FLAG_ISO_DESIGNATION)) |
1466 | goto label_invalid_code; | |
4ed46869 KH |
1467 | ONE_MORE_BYTE (c1); |
1468 | if (c1 >= '@' && c1 <= 'B') | |
1469 | { /* designation of JISX0208.1978, GB2312.1980, | |
88993dfd | 1470 | or JISX0208.1980 */ |
4ed46869 KH |
1471 | DECODE_DESIGNATION (0, 2, 94, c1); |
1472 | } | |
1473 | else if (c1 >= 0x28 && c1 <= 0x2B) | |
1474 | { /* designation of DIMENSION2_CHARS94 character set */ | |
1475 | ONE_MORE_BYTE (c2); | |
1476 | DECODE_DESIGNATION (c1 - 0x28, 2, 94, c2); | |
1477 | } | |
1478 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
1479 | { /* designation of DIMENSION2_CHARS96 character set */ | |
1480 | ONE_MORE_BYTE (c2); | |
1481 | DECODE_DESIGNATION (c1 - 0x2C, 2, 96, c2); | |
1482 | } | |
1483 | else | |
d46c5b12 | 1484 | goto label_invalid_code; |
b73bfc1c KH |
1485 | /* We must update these variables now. */ |
1486 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
1487 | charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
1488 | continue; | |
4ed46869 KH |
1489 | |
1490 | case 'n': /* invocation of locking-shift-2 */ | |
d46c5b12 KH |
1491 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1492 | || CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0) | |
1493 | goto label_invalid_code; | |
4ed46869 | 1494 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 2; |
e0e989f6 | 1495 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); |
b73bfc1c | 1496 | continue; |
4ed46869 KH |
1497 | |
1498 | case 'o': /* invocation of locking-shift-3 */ | |
d46c5b12 KH |
1499 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1500 | || CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0) | |
1501 | goto label_invalid_code; | |
4ed46869 | 1502 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 3; |
e0e989f6 | 1503 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); |
b73bfc1c | 1504 | continue; |
4ed46869 KH |
1505 | |
1506 | case 'N': /* invocation of single-shift-2 */ | |
d46c5b12 KH |
1507 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) |
1508 | || CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0) | |
1509 | goto label_invalid_code; | |
4ed46869 | 1510 | charset = CODING_SPEC_ISO_DESIGNATION (coding, 2); |
b73bfc1c | 1511 | ONE_MORE_BYTE (c1); |
e7046a18 KH |
1512 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
1513 | goto label_invalid_code; | |
4ed46869 KH |
1514 | break; |
1515 | ||
1516 | case 'O': /* invocation of single-shift-3 */ | |
d46c5b12 KH |
1517 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) |
1518 | || CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0) | |
1519 | goto label_invalid_code; | |
4ed46869 | 1520 | charset = CODING_SPEC_ISO_DESIGNATION (coding, 3); |
b73bfc1c | 1521 | ONE_MORE_BYTE (c1); |
e7046a18 KH |
1522 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
1523 | goto label_invalid_code; | |
4ed46869 KH |
1524 | break; |
1525 | ||
ec6d2bb8 KH |
1526 | case '0': case '2': case '3': case '4': /* start composition */ |
1527 | DECODE_COMPOSITION_START (c1); | |
b73bfc1c | 1528 | continue; |
4ed46869 | 1529 | |
ec6d2bb8 KH |
1530 | case '1': /* end composition */ |
1531 | DECODE_COMPOSITION_END (c1); | |
b73bfc1c | 1532 | continue; |
4ed46869 KH |
1533 | |
1534 | case '[': /* specification of direction */ | |
d46c5b12 KH |
1535 | if (coding->flags & CODING_FLAG_ISO_NO_DIRECTION) |
1536 | goto label_invalid_code; | |
4ed46869 | 1537 | /* For the moment, nested direction is not supported. |
d46c5b12 KH |
1538 | So, `coding->mode & CODING_MODE_DIRECTION' zero means |
1539 | left-to-right, and nozero means right-to-left. */ | |
4ed46869 KH |
1540 | ONE_MORE_BYTE (c1); |
1541 | switch (c1) | |
1542 | { | |
1543 | case ']': /* end of the current direction */ | |
d46c5b12 | 1544 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 KH |
1545 | |
1546 | case '0': /* end of the current direction */ | |
1547 | case '1': /* start of left-to-right direction */ | |
1548 | ONE_MORE_BYTE (c1); | |
1549 | if (c1 == ']') | |
d46c5b12 | 1550 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 | 1551 | else |
d46c5b12 | 1552 | goto label_invalid_code; |
4ed46869 KH |
1553 | break; |
1554 | ||
1555 | case '2': /* start of right-to-left direction */ | |
1556 | ONE_MORE_BYTE (c1); | |
1557 | if (c1 == ']') | |
d46c5b12 | 1558 | coding->mode |= CODING_MODE_DIRECTION; |
4ed46869 | 1559 | else |
d46c5b12 | 1560 | goto label_invalid_code; |
4ed46869 KH |
1561 | break; |
1562 | ||
1563 | default: | |
d46c5b12 | 1564 | goto label_invalid_code; |
4ed46869 | 1565 | } |
b73bfc1c | 1566 | continue; |
4ed46869 KH |
1567 | |
1568 | default: | |
d46c5b12 KH |
1569 | if (! (coding->flags & CODING_FLAG_ISO_DESIGNATION)) |
1570 | goto label_invalid_code; | |
4ed46869 KH |
1571 | if (c1 >= 0x28 && c1 <= 0x2B) |
1572 | { /* designation of DIMENSION1_CHARS94 character set */ | |
1573 | ONE_MORE_BYTE (c2); | |
1574 | DECODE_DESIGNATION (c1 - 0x28, 1, 94, c2); | |
1575 | } | |
1576 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
1577 | { /* designation of DIMENSION1_CHARS96 character set */ | |
1578 | ONE_MORE_BYTE (c2); | |
1579 | DECODE_DESIGNATION (c1 - 0x2C, 1, 96, c2); | |
1580 | } | |
1581 | else | |
b73bfc1c KH |
1582 | goto label_invalid_code; |
1583 | /* We must update these variables now. */ | |
1584 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
1585 | charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
1586 | continue; | |
4ed46869 | 1587 | } |
b73bfc1c | 1588 | } |
4ed46869 | 1589 | |
b73bfc1c KH |
1590 | /* Now we know CHARSET and 1st position code C1 of a character. |
1591 | Produce a multibyte sequence for that character while getting | |
1592 | 2nd position code C2 if necessary. */ | |
1593 | if (CHARSET_DIMENSION (charset) == 2) | |
1594 | { | |
1595 | ONE_MORE_BYTE (c2); | |
1596 | if (c1 < 0x80 ? c2 < 0x20 || c2 >= 0x80 : c2 < 0xA0) | |
1597 | /* C2 is not in a valid range. */ | |
1598 | goto label_invalid_code; | |
4ed46869 | 1599 | } |
b73bfc1c KH |
1600 | c = DECODE_ISO_CHARACTER (charset, c1, c2); |
1601 | EMIT_CHAR (c); | |
4ed46869 KH |
1602 | continue; |
1603 | ||
b73bfc1c KH |
1604 | label_invalid_code: |
1605 | coding->errors++; | |
1606 | if (COMPOSING_P (coding)) | |
1607 | DECODE_COMPOSITION_END ('1'); | |
4ed46869 | 1608 | src = src_base; |
b73bfc1c KH |
1609 | c = *src++; |
1610 | EMIT_CHAR (c); | |
4ed46869 | 1611 | } |
fb88bf2d | 1612 | |
b73bfc1c KH |
1613 | label_end_of_loop: |
1614 | coding->consumed = coding->consumed_char = src_base - source; | |
d46c5b12 | 1615 | coding->produced = dst - destination; |
b73bfc1c | 1616 | return; |
4ed46869 KH |
1617 | } |
1618 | ||
b73bfc1c | 1619 | |
f4dee582 | 1620 | /* ISO2022 encoding stuff. */ |
4ed46869 KH |
1621 | |
1622 | /* | |
f4dee582 | 1623 | It is not enough to say just "ISO2022" on encoding, we have to |
d46c5b12 | 1624 | specify more details. In Emacs, each coding system of ISO2022 |
4ed46869 KH |
1625 | variant has the following specifications: |
1626 | 1. Initial designation to G0 thru G3. | |
1627 | 2. Allows short-form designation? | |
1628 | 3. ASCII should be designated to G0 before control characters? | |
1629 | 4. ASCII should be designated to G0 at end of line? | |
1630 | 5. 7-bit environment or 8-bit environment? | |
1631 | 6. Use locking-shift? | |
1632 | 7. Use Single-shift? | |
1633 | And the following two are only for Japanese: | |
1634 | 8. Use ASCII in place of JIS0201-1976-Roman? | |
1635 | 9. Use JISX0208-1983 in place of JISX0208-1978? | |
1636 | These specifications are encoded in `coding->flags' as flag bits | |
1637 | defined by macros CODING_FLAG_ISO_XXX. See `coding.h' for more | |
f4dee582 | 1638 | details. |
4ed46869 KH |
1639 | */ |
1640 | ||
1641 | /* Produce codes (escape sequence) for designating CHARSET to graphic | |
b73bfc1c KH |
1642 | register REG at DST, and increment DST. If <final-char> of CHARSET is |
1643 | '@', 'A', or 'B' and the coding system CODING allows, produce | |
1644 | designation sequence of short-form. */ | |
4ed46869 KH |
1645 | |
1646 | #define ENCODE_DESIGNATION(charset, reg, coding) \ | |
1647 | do { \ | |
1648 | unsigned char final_char = CHARSET_ISO_FINAL_CHAR (charset); \ | |
1649 | char *intermediate_char_94 = "()*+"; \ | |
1650 | char *intermediate_char_96 = ",-./"; \ | |
70c22245 | 1651 | int revision = CODING_SPEC_ISO_REVISION_NUMBER(coding, charset); \ |
b73bfc1c | 1652 | \ |
70c22245 KH |
1653 | if (revision < 255) \ |
1654 | { \ | |
4ed46869 KH |
1655 | *dst++ = ISO_CODE_ESC; \ |
1656 | *dst++ = '&'; \ | |
70c22245 | 1657 | *dst++ = '@' + revision; \ |
4ed46869 | 1658 | } \ |
b73bfc1c | 1659 | *dst++ = ISO_CODE_ESC; \ |
4ed46869 KH |
1660 | if (CHARSET_DIMENSION (charset) == 1) \ |
1661 | { \ | |
1662 | if (CHARSET_CHARS (charset) == 94) \ | |
1663 | *dst++ = (unsigned char) (intermediate_char_94[reg]); \ | |
1664 | else \ | |
1665 | *dst++ = (unsigned char) (intermediate_char_96[reg]); \ | |
1666 | } \ | |
1667 | else \ | |
1668 | { \ | |
1669 | *dst++ = '$'; \ | |
1670 | if (CHARSET_CHARS (charset) == 94) \ | |
1671 | { \ | |
b73bfc1c KH |
1672 | if (! (coding->flags & CODING_FLAG_ISO_SHORT_FORM) \ |
1673 | || reg != 0 \ | |
1674 | || final_char < '@' || final_char > 'B') \ | |
4ed46869 KH |
1675 | *dst++ = (unsigned char) (intermediate_char_94[reg]); \ |
1676 | } \ | |
1677 | else \ | |
b73bfc1c | 1678 | *dst++ = (unsigned char) (intermediate_char_96[reg]); \ |
4ed46869 | 1679 | } \ |
b73bfc1c | 1680 | *dst++ = final_char; \ |
4ed46869 KH |
1681 | CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \ |
1682 | } while (0) | |
1683 | ||
1684 | /* The following two macros produce codes (control character or escape | |
1685 | sequence) for ISO2022 single-shift functions (single-shift-2 and | |
1686 | single-shift-3). */ | |
1687 | ||
1688 | #define ENCODE_SINGLE_SHIFT_2 \ | |
1689 | do { \ | |
1690 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
1691 | *dst++ = ISO_CODE_ESC, *dst++ = 'N'; \ | |
1692 | else \ | |
b73bfc1c | 1693 | *dst++ = ISO_CODE_SS2; \ |
4ed46869 KH |
1694 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 1; \ |
1695 | } while (0) | |
1696 | ||
fb88bf2d KH |
1697 | #define ENCODE_SINGLE_SHIFT_3 \ |
1698 | do { \ | |
4ed46869 | 1699 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ |
fb88bf2d KH |
1700 | *dst++ = ISO_CODE_ESC, *dst++ = 'O'; \ |
1701 | else \ | |
b73bfc1c | 1702 | *dst++ = ISO_CODE_SS3; \ |
4ed46869 KH |
1703 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 1; \ |
1704 | } while (0) | |
1705 | ||
1706 | /* The following four macros produce codes (control character or | |
1707 | escape sequence) for ISO2022 locking-shift functions (shift-in, | |
1708 | shift-out, locking-shift-2, and locking-shift-3). */ | |
1709 | ||
b73bfc1c KH |
1710 | #define ENCODE_SHIFT_IN \ |
1711 | do { \ | |
1712 | *dst++ = ISO_CODE_SI; \ | |
4ed46869 KH |
1713 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; \ |
1714 | } while (0) | |
1715 | ||
b73bfc1c KH |
1716 | #define ENCODE_SHIFT_OUT \ |
1717 | do { \ | |
1718 | *dst++ = ISO_CODE_SO; \ | |
4ed46869 KH |
1719 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 1; \ |
1720 | } while (0) | |
1721 | ||
1722 | #define ENCODE_LOCKING_SHIFT_2 \ | |
1723 | do { \ | |
1724 | *dst++ = ISO_CODE_ESC, *dst++ = 'n'; \ | |
1725 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 2; \ | |
1726 | } while (0) | |
1727 | ||
b73bfc1c KH |
1728 | #define ENCODE_LOCKING_SHIFT_3 \ |
1729 | do { \ | |
1730 | *dst++ = ISO_CODE_ESC, *dst++ = 'o'; \ | |
4ed46869 KH |
1731 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 3; \ |
1732 | } while (0) | |
1733 | ||
f4dee582 RS |
1734 | /* Produce codes for a DIMENSION1 character whose character set is |
1735 | CHARSET and whose position-code is C1. Designation and invocation | |
4ed46869 KH |
1736 | sequences are also produced in advance if necessary. */ |
1737 | ||
6e85d753 KH |
1738 | #define ENCODE_ISO_CHARACTER_DIMENSION1(charset, c1) \ |
1739 | do { \ | |
1740 | if (CODING_SPEC_ISO_SINGLE_SHIFTING (coding)) \ | |
1741 | { \ | |
1742 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
1743 | *dst++ = c1 & 0x7F; \ | |
1744 | else \ | |
1745 | *dst++ = c1 | 0x80; \ | |
1746 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
1747 | break; \ | |
1748 | } \ | |
1749 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 0)) \ | |
1750 | { \ | |
1751 | *dst++ = c1 & 0x7F; \ | |
1752 | break; \ | |
1753 | } \ | |
1754 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 1)) \ | |
1755 | { \ | |
1756 | *dst++ = c1 | 0x80; \ | |
1757 | break; \ | |
1758 | } \ | |
6e85d753 KH |
1759 | else \ |
1760 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
1761 | must invoke it, or, at first, designate it to some graphic \ | |
1762 | register. Then repeat the loop to actually produce the \ | |
1763 | character. */ \ | |
1764 | dst = encode_invocation_designation (charset, coding, dst); \ | |
4ed46869 KH |
1765 | } while (1) |
1766 | ||
f4dee582 RS |
1767 | /* Produce codes for a DIMENSION2 character whose character set is |
1768 | CHARSET and whose position-codes are C1 and C2. Designation and | |
4ed46869 KH |
1769 | invocation codes are also produced in advance if necessary. */ |
1770 | ||
6e85d753 KH |
1771 | #define ENCODE_ISO_CHARACTER_DIMENSION2(charset, c1, c2) \ |
1772 | do { \ | |
1773 | if (CODING_SPEC_ISO_SINGLE_SHIFTING (coding)) \ | |
1774 | { \ | |
1775 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
1776 | *dst++ = c1 & 0x7F, *dst++ = c2 & 0x7F; \ | |
1777 | else \ | |
1778 | *dst++ = c1 | 0x80, *dst++ = c2 | 0x80; \ | |
1779 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
1780 | break; \ | |
1781 | } \ | |
1782 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 0)) \ | |
1783 | { \ | |
1784 | *dst++ = c1 & 0x7F, *dst++= c2 & 0x7F; \ | |
1785 | break; \ | |
1786 | } \ | |
1787 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 1)) \ | |
1788 | { \ | |
1789 | *dst++ = c1 | 0x80, *dst++= c2 | 0x80; \ | |
1790 | break; \ | |
1791 | } \ | |
6e85d753 KH |
1792 | else \ |
1793 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
1794 | must invoke it, or, at first, designate it to some graphic \ | |
1795 | register. Then repeat the loop to actually produce the \ | |
1796 | character. */ \ | |
1797 | dst = encode_invocation_designation (charset, coding, dst); \ | |
4ed46869 KH |
1798 | } while (1) |
1799 | ||
05e6f5dc KH |
1800 | #define ENCODE_ISO_CHARACTER(c) \ |
1801 | do { \ | |
1802 | int charset, c1, c2; \ | |
1803 | \ | |
1804 | SPLIT_CHAR (c, charset, c1, c2); \ | |
1805 | if (CHARSET_DEFINED_P (charset)) \ | |
1806 | { \ | |
1807 | if (CHARSET_DIMENSION (charset) == 1) \ | |
1808 | { \ | |
1809 | if (charset == CHARSET_ASCII \ | |
1810 | && coding->flags & CODING_FLAG_ISO_USE_ROMAN) \ | |
1811 | charset = charset_latin_jisx0201; \ | |
1812 | ENCODE_ISO_CHARACTER_DIMENSION1 (charset, c1); \ | |
1813 | } \ | |
1814 | else \ | |
1815 | { \ | |
1816 | if (charset == charset_jisx0208 \ | |
1817 | && coding->flags & CODING_FLAG_ISO_USE_OLDJIS) \ | |
1818 | charset = charset_jisx0208_1978; \ | |
1819 | ENCODE_ISO_CHARACTER_DIMENSION2 (charset, c1, c2); \ | |
1820 | } \ | |
1821 | } \ | |
1822 | else \ | |
1823 | { \ | |
1824 | *dst++ = c1; \ | |
1825 | if (c2 >= 0) \ | |
1826 | *dst++ = c2; \ | |
1827 | } \ | |
1828 | } while (0) | |
1829 | ||
1830 | ||
1831 | /* Instead of encoding character C, produce one or two `?'s. */ | |
1832 | ||
1833 | #define ENCODE_UNSAFE_CHARACTER(c) \ | |
6f551029 | 1834 | do { \ |
05e6f5dc KH |
1835 | ENCODE_ISO_CHARACTER (CODING_INHIBIT_CHARACTER_SUBSTITUTION); \ |
1836 | if (CHARSET_WIDTH (CHAR_CHARSET (c)) > 1) \ | |
1837 | ENCODE_ISO_CHARACTER (CODING_INHIBIT_CHARACTER_SUBSTITUTION); \ | |
84fbb8a0 | 1838 | } while (0) |
bdd9fb48 | 1839 | |
05e6f5dc | 1840 | |
4ed46869 KH |
1841 | /* Produce designation and invocation codes at a place pointed by DST |
1842 | to use CHARSET. The element `spec.iso2022' of *CODING is updated. | |
1843 | Return new DST. */ | |
1844 | ||
1845 | unsigned char * | |
1846 | encode_invocation_designation (charset, coding, dst) | |
1847 | int charset; | |
1848 | struct coding_system *coding; | |
1849 | unsigned char *dst; | |
1850 | { | |
1851 | int reg; /* graphic register number */ | |
1852 | ||
1853 | /* At first, check designations. */ | |
1854 | for (reg = 0; reg < 4; reg++) | |
1855 | if (charset == CODING_SPEC_ISO_DESIGNATION (coding, reg)) | |
1856 | break; | |
1857 | ||
1858 | if (reg >= 4) | |
1859 | { | |
1860 | /* CHARSET is not yet designated to any graphic registers. */ | |
1861 | /* At first check the requested designation. */ | |
1862 | reg = CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset); | |
1ba9e4ab KH |
1863 | if (reg == CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION) |
1864 | /* Since CHARSET requests no special designation, designate it | |
1865 | to graphic register 0. */ | |
4ed46869 KH |
1866 | reg = 0; |
1867 | ||
1868 | ENCODE_DESIGNATION (charset, reg, coding); | |
1869 | } | |
1870 | ||
1871 | if (CODING_SPEC_ISO_INVOCATION (coding, 0) != reg | |
1872 | && CODING_SPEC_ISO_INVOCATION (coding, 1) != reg) | |
1873 | { | |
1874 | /* Since the graphic register REG is not invoked to any graphic | |
1875 | planes, invoke it to graphic plane 0. */ | |
1876 | switch (reg) | |
1877 | { | |
1878 | case 0: /* graphic register 0 */ | |
1879 | ENCODE_SHIFT_IN; | |
1880 | break; | |
1881 | ||
1882 | case 1: /* graphic register 1 */ | |
1883 | ENCODE_SHIFT_OUT; | |
1884 | break; | |
1885 | ||
1886 | case 2: /* graphic register 2 */ | |
1887 | if (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) | |
1888 | ENCODE_SINGLE_SHIFT_2; | |
1889 | else | |
1890 | ENCODE_LOCKING_SHIFT_2; | |
1891 | break; | |
1892 | ||
1893 | case 3: /* graphic register 3 */ | |
1894 | if (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) | |
1895 | ENCODE_SINGLE_SHIFT_3; | |
1896 | else | |
1897 | ENCODE_LOCKING_SHIFT_3; | |
1898 | break; | |
1899 | } | |
1900 | } | |
b73bfc1c | 1901 | |
4ed46869 KH |
1902 | return dst; |
1903 | } | |
1904 | ||
ec6d2bb8 KH |
1905 | /* Produce 2-byte codes for encoded composition rule RULE. */ |
1906 | ||
1907 | #define ENCODE_COMPOSITION_RULE(rule) \ | |
1908 | do { \ | |
1909 | int gref, nref; \ | |
1910 | COMPOSITION_DECODE_RULE (rule, gref, nref); \ | |
1911 | *dst++ = 32 + 81 + gref; \ | |
1912 | *dst++ = 32 + nref; \ | |
1913 | } while (0) | |
1914 | ||
1915 | /* Produce codes for indicating the start of a composition sequence | |
1916 | (ESC 0, ESC 3, or ESC 4). DATA points to an array of integers | |
1917 | which specify information about the composition. See the comment | |
1918 | in coding.h for the format of DATA. */ | |
1919 | ||
1920 | #define ENCODE_COMPOSITION_START(coding, data) \ | |
1921 | do { \ | |
1922 | coding->composing = data[3]; \ | |
1923 | *dst++ = ISO_CODE_ESC; \ | |
1924 | if (coding->composing == COMPOSITION_RELATIVE) \ | |
1925 | *dst++ = '0'; \ | |
1926 | else \ | |
1927 | { \ | |
1928 | *dst++ = (coding->composing == COMPOSITION_WITH_ALTCHARS \ | |
1929 | ? '3' : '4'); \ | |
1930 | coding->cmp_data_index = coding->cmp_data_start + 4; \ | |
1931 | coding->composition_rule_follows = 0; \ | |
1932 | } \ | |
1933 | } while (0) | |
1934 | ||
1935 | /* Produce codes for indicating the end of the current composition. */ | |
1936 | ||
1937 | #define ENCODE_COMPOSITION_END(coding, data) \ | |
1938 | do { \ | |
1939 | *dst++ = ISO_CODE_ESC; \ | |
1940 | *dst++ = '1'; \ | |
1941 | coding->cmp_data_start += data[0]; \ | |
1942 | coding->composing = COMPOSITION_NO; \ | |
1943 | if (coding->cmp_data_start == coding->cmp_data->used \ | |
1944 | && coding->cmp_data->next) \ | |
1945 | { \ | |
1946 | coding->cmp_data = coding->cmp_data->next; \ | |
1947 | coding->cmp_data_start = 0; \ | |
1948 | } \ | |
1949 | } while (0) | |
1950 | ||
1951 | /* Produce composition start sequence ESC 0. Here, this sequence | |
1952 | doesn't mean the start of a new composition but means that we have | |
1953 | just produced components (alternate chars and composition rules) of | |
1954 | the composition and the actual text follows in SRC. */ | |
1955 | ||
1956 | #define ENCODE_COMPOSITION_FAKE_START(coding) \ | |
1957 | do { \ | |
1958 | *dst++ = ISO_CODE_ESC; \ | |
1959 | *dst++ = '0'; \ | |
1960 | coding->composing = COMPOSITION_RELATIVE; \ | |
1961 | } while (0) | |
4ed46869 KH |
1962 | |
1963 | /* The following three macros produce codes for indicating direction | |
1964 | of text. */ | |
b73bfc1c KH |
1965 | #define ENCODE_CONTROL_SEQUENCE_INTRODUCER \ |
1966 | do { \ | |
4ed46869 | 1967 | if (coding->flags == CODING_FLAG_ISO_SEVEN_BITS) \ |
b73bfc1c KH |
1968 | *dst++ = ISO_CODE_ESC, *dst++ = '['; \ |
1969 | else \ | |
1970 | *dst++ = ISO_CODE_CSI; \ | |
4ed46869 KH |
1971 | } while (0) |
1972 | ||
1973 | #define ENCODE_DIRECTION_R2L \ | |
b73bfc1c | 1974 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst), *dst++ = '2', *dst++ = ']' |
4ed46869 KH |
1975 | |
1976 | #define ENCODE_DIRECTION_L2R \ | |
b73bfc1c | 1977 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst), *dst++ = '0', *dst++ = ']' |
4ed46869 KH |
1978 | |
1979 | /* Produce codes for designation and invocation to reset the graphic | |
1980 | planes and registers to initial state. */ | |
e0e989f6 KH |
1981 | #define ENCODE_RESET_PLANE_AND_REGISTER \ |
1982 | do { \ | |
1983 | int reg; \ | |
1984 | if (CODING_SPEC_ISO_INVOCATION (coding, 0) != 0) \ | |
1985 | ENCODE_SHIFT_IN; \ | |
1986 | for (reg = 0; reg < 4; reg++) \ | |
1987 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg) >= 0 \ | |
1988 | && (CODING_SPEC_ISO_DESIGNATION (coding, reg) \ | |
1989 | != CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg))) \ | |
1990 | ENCODE_DESIGNATION \ | |
1991 | (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg), reg, coding); \ | |
4ed46869 KH |
1992 | } while (0) |
1993 | ||
bdd9fb48 | 1994 | /* Produce designation sequences of charsets in the line started from |
b73bfc1c | 1995 | SRC to a place pointed by DST, and return updated DST. |
bdd9fb48 KH |
1996 | |
1997 | If the current block ends before any end-of-line, we may fail to | |
d46c5b12 KH |
1998 | find all the necessary designations. */ |
1999 | ||
b73bfc1c KH |
2000 | static unsigned char * |
2001 | encode_designation_at_bol (coding, translation_table, src, src_end, dst) | |
e0e989f6 | 2002 | struct coding_system *coding; |
b73bfc1c KH |
2003 | Lisp_Object translation_table; |
2004 | unsigned char *src, *src_end, *dst; | |
e0e989f6 | 2005 | { |
bdd9fb48 KH |
2006 | int charset, c, found = 0, reg; |
2007 | /* Table of charsets to be designated to each graphic register. */ | |
2008 | int r[4]; | |
bdd9fb48 KH |
2009 | |
2010 | for (reg = 0; reg < 4; reg++) | |
2011 | r[reg] = -1; | |
2012 | ||
b73bfc1c | 2013 | while (found < 4) |
e0e989f6 | 2014 | { |
b73bfc1c KH |
2015 | ONE_MORE_CHAR (c); |
2016 | if (c == '\n') | |
2017 | break; | |
bdd9fb48 | 2018 | |
b73bfc1c | 2019 | charset = CHAR_CHARSET (c); |
e0e989f6 | 2020 | reg = CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset); |
d46c5b12 | 2021 | if (reg != CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION && r[reg] < 0) |
bdd9fb48 KH |
2022 | { |
2023 | found++; | |
2024 | r[reg] = charset; | |
2025 | } | |
bdd9fb48 KH |
2026 | } |
2027 | ||
b73bfc1c | 2028 | label_end_of_loop: |
bdd9fb48 KH |
2029 | if (found) |
2030 | { | |
2031 | for (reg = 0; reg < 4; reg++) | |
2032 | if (r[reg] >= 0 | |
2033 | && CODING_SPEC_ISO_DESIGNATION (coding, reg) != r[reg]) | |
2034 | ENCODE_DESIGNATION (r[reg], reg, coding); | |
e0e989f6 | 2035 | } |
b73bfc1c KH |
2036 | |
2037 | return dst; | |
e0e989f6 KH |
2038 | } |
2039 | ||
4ed46869 KH |
2040 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */ |
2041 | ||
b73bfc1c | 2042 | static void |
d46c5b12 | 2043 | encode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
2044 | struct coding_system *coding; |
2045 | unsigned char *source, *destination; | |
2046 | int src_bytes, dst_bytes; | |
4ed46869 KH |
2047 | { |
2048 | unsigned char *src = source; | |
2049 | unsigned char *src_end = source + src_bytes; | |
2050 | unsigned char *dst = destination; | |
2051 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c | 2052 | /* Since the maximum bytes produced by each loop is 20, we subtract 19 |
4ed46869 KH |
2053 | from DST_END to assure overflow checking is necessary only at the |
2054 | head of loop. */ | |
b73bfc1c KH |
2055 | unsigned char *adjusted_dst_end = dst_end - 19; |
2056 | /* SRC_BASE remembers the start position in source in each loop. | |
2057 | The loop will be exited when there's not enough source text to | |
2058 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
2059 | there's not enough destination area to produce encoded codes | |
2060 | (within macro EMIT_BYTES). */ | |
2061 | unsigned char *src_base; | |
2062 | int c; | |
2063 | Lisp_Object translation_table; | |
05e6f5dc KH |
2064 | Lisp_Object safe_chars; |
2065 | ||
2066 | safe_chars = coding_safe_chars (coding); | |
bdd9fb48 | 2067 | |
b73bfc1c KH |
2068 | if (NILP (Venable_character_translation)) |
2069 | translation_table = Qnil; | |
2070 | else | |
2071 | { | |
2072 | translation_table = coding->translation_table_for_encode; | |
2073 | if (NILP (translation_table)) | |
2074 | translation_table = Vstandard_translation_table_for_encode; | |
2075 | } | |
4ed46869 | 2076 | |
d46c5b12 | 2077 | coding->consumed_char = 0; |
b73bfc1c KH |
2078 | coding->errors = 0; |
2079 | while (1) | |
4ed46869 | 2080 | { |
b73bfc1c KH |
2081 | src_base = src; |
2082 | ||
2083 | if (dst >= (dst_bytes ? adjusted_dst_end : (src - 19))) | |
2084 | { | |
2085 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
2086 | break; | |
2087 | } | |
4ed46869 | 2088 | |
e0e989f6 KH |
2089 | if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL |
2090 | && CODING_SPEC_ISO_BOL (coding)) | |
2091 | { | |
bdd9fb48 | 2092 | /* We have to produce designation sequences if any now. */ |
b73bfc1c KH |
2093 | dst = encode_designation_at_bol (coding, translation_table, |
2094 | src, src_end, dst); | |
e0e989f6 KH |
2095 | CODING_SPEC_ISO_BOL (coding) = 0; |
2096 | } | |
2097 | ||
ec6d2bb8 KH |
2098 | /* Check composition start and end. */ |
2099 | if (coding->composing != COMPOSITION_DISABLED | |
2100 | && coding->cmp_data_start < coding->cmp_data->used) | |
4ed46869 | 2101 | { |
ec6d2bb8 KH |
2102 | struct composition_data *cmp_data = coding->cmp_data; |
2103 | int *data = cmp_data->data + coding->cmp_data_start; | |
2104 | int this_pos = cmp_data->char_offset + coding->consumed_char; | |
2105 | ||
2106 | if (coding->composing == COMPOSITION_RELATIVE) | |
4ed46869 | 2107 | { |
ec6d2bb8 KH |
2108 | if (this_pos == data[2]) |
2109 | { | |
2110 | ENCODE_COMPOSITION_END (coding, data); | |
2111 | cmp_data = coding->cmp_data; | |
2112 | data = cmp_data->data + coding->cmp_data_start; | |
2113 | } | |
4ed46869 | 2114 | } |
ec6d2bb8 | 2115 | else if (COMPOSING_P (coding)) |
4ed46869 | 2116 | { |
ec6d2bb8 KH |
2117 | /* COMPOSITION_WITH_ALTCHARS or COMPOSITION_WITH_RULE_ALTCHAR */ |
2118 | if (coding->cmp_data_index == coding->cmp_data_start + data[0]) | |
2119 | /* We have consumed components of the composition. | |
2120 | What follows in SRC is the compositions's base | |
2121 | text. */ | |
2122 | ENCODE_COMPOSITION_FAKE_START (coding); | |
2123 | else | |
4ed46869 | 2124 | { |
ec6d2bb8 KH |
2125 | int c = cmp_data->data[coding->cmp_data_index++]; |
2126 | if (coding->composition_rule_follows) | |
2127 | { | |
2128 | ENCODE_COMPOSITION_RULE (c); | |
2129 | coding->composition_rule_follows = 0; | |
2130 | } | |
2131 | else | |
2132 | { | |
05e6f5dc KH |
2133 | if (coding->flags & CODING_FLAG_ISO_SAFE |
2134 | && ! CODING_SAFE_CHAR_P (safe_chars, c)) | |
2135 | ENCODE_UNSAFE_CHARACTER (c); | |
2136 | else | |
2137 | ENCODE_ISO_CHARACTER (c); | |
ec6d2bb8 KH |
2138 | if (coding->composing == COMPOSITION_WITH_RULE_ALTCHARS) |
2139 | coding->composition_rule_follows = 1; | |
2140 | } | |
4ed46869 KH |
2141 | continue; |
2142 | } | |
ec6d2bb8 KH |
2143 | } |
2144 | if (!COMPOSING_P (coding)) | |
2145 | { | |
2146 | if (this_pos == data[1]) | |
4ed46869 | 2147 | { |
ec6d2bb8 KH |
2148 | ENCODE_COMPOSITION_START (coding, data); |
2149 | continue; | |
4ed46869 | 2150 | } |
4ed46869 KH |
2151 | } |
2152 | } | |
ec6d2bb8 | 2153 | |
b73bfc1c | 2154 | ONE_MORE_CHAR (c); |
4ed46869 | 2155 | |
b73bfc1c KH |
2156 | /* Now encode the character C. */ |
2157 | if (c < 0x20 || c == 0x7F) | |
2158 | { | |
2159 | if (c == '\r') | |
19a8d9e0 | 2160 | { |
b73bfc1c KH |
2161 | if (! (coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) |
2162 | { | |
2163 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL) | |
2164 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2165 | *dst++ = c; | |
2166 | continue; | |
2167 | } | |
2168 | /* fall down to treat '\r' as '\n' ... */ | |
2169 | c = '\n'; | |
19a8d9e0 | 2170 | } |
b73bfc1c | 2171 | if (c == '\n') |
19a8d9e0 | 2172 | { |
b73bfc1c KH |
2173 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_EOL) |
2174 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2175 | if (coding->flags & CODING_FLAG_ISO_INIT_AT_BOL) | |
2176 | bcopy (coding->spec.iso2022.initial_designation, | |
2177 | coding->spec.iso2022.current_designation, | |
2178 | sizeof coding->spec.iso2022.initial_designation); | |
2179 | if (coding->eol_type == CODING_EOL_LF | |
2180 | || coding->eol_type == CODING_EOL_UNDECIDED) | |
2181 | *dst++ = ISO_CODE_LF; | |
2182 | else if (coding->eol_type == CODING_EOL_CRLF) | |
2183 | *dst++ = ISO_CODE_CR, *dst++ = ISO_CODE_LF; | |
2184 | else | |
2185 | *dst++ = ISO_CODE_CR; | |
2186 | CODING_SPEC_ISO_BOL (coding) = 1; | |
19a8d9e0 | 2187 | } |
b73bfc1c | 2188 | else |
19a8d9e0 | 2189 | { |
b73bfc1c KH |
2190 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL) |
2191 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2192 | *dst++ = c; | |
19a8d9e0 | 2193 | } |
4ed46869 | 2194 | } |
b73bfc1c | 2195 | else if (ASCII_BYTE_P (c)) |
05e6f5dc | 2196 | ENCODE_ISO_CHARACTER (c); |
b73bfc1c | 2197 | else if (SINGLE_BYTE_CHAR_P (c)) |
88993dfd | 2198 | { |
b73bfc1c KH |
2199 | *dst++ = c; |
2200 | coding->errors++; | |
88993dfd | 2201 | } |
05e6f5dc KH |
2202 | else if (coding->flags & CODING_FLAG_ISO_SAFE |
2203 | && ! CODING_SAFE_CHAR_P (safe_chars, c)) | |
2204 | ENCODE_UNSAFE_CHARACTER (c); | |
b73bfc1c | 2205 | else |
05e6f5dc | 2206 | ENCODE_ISO_CHARACTER (c); |
b73bfc1c KH |
2207 | |
2208 | coding->consumed_char++; | |
84fbb8a0 | 2209 | } |
b73bfc1c KH |
2210 | |
2211 | label_end_of_loop: | |
2212 | coding->consumed = src_base - source; | |
d46c5b12 | 2213 | coding->produced = coding->produced_char = dst - destination; |
4ed46869 KH |
2214 | } |
2215 | ||
2216 | \f | |
2217 | /*** 4. SJIS and BIG5 handlers ***/ | |
2218 | ||
f4dee582 | 2219 | /* Although SJIS and BIG5 are not ISO's coding system, they are used |
4ed46869 KH |
2220 | quite widely. So, for the moment, Emacs supports them in the bare |
2221 | C code. But, in the future, they may be supported only by CCL. */ | |
2222 | ||
2223 | /* SJIS is a coding system encoding three character sets: ASCII, right | |
2224 | half of JISX0201-Kana, and JISX0208. An ASCII character is encoded | |
2225 | as is. A character of charset katakana-jisx0201 is encoded by | |
2226 | "position-code + 0x80". A character of charset japanese-jisx0208 | |
2227 | is encoded in 2-byte but two position-codes are divided and shifted | |
2228 | so that it fit in the range below. | |
2229 | ||
2230 | --- CODE RANGE of SJIS --- | |
2231 | (character set) (range) | |
2232 | ASCII 0x00 .. 0x7F | |
2233 | KATAKANA-JISX0201 0xA0 .. 0xDF | |
c28a9453 | 2234 | JISX0208 (1st byte) 0x81 .. 0x9F and 0xE0 .. 0xEF |
d14d03ac | 2235 | (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC |
4ed46869 KH |
2236 | ------------------------------- |
2237 | ||
2238 | */ | |
2239 | ||
2240 | /* BIG5 is a coding system encoding two character sets: ASCII and | |
2241 | Big5. An ASCII character is encoded as is. Big5 is a two-byte | |
2242 | character set and is encoded in two-byte. | |
2243 | ||
2244 | --- CODE RANGE of BIG5 --- | |
2245 | (character set) (range) | |
2246 | ASCII 0x00 .. 0x7F | |
2247 | Big5 (1st byte) 0xA1 .. 0xFE | |
2248 | (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE | |
2249 | -------------------------- | |
2250 | ||
2251 | Since the number of characters in Big5 is larger than maximum | |
2252 | characters in Emacs' charset (96x96), it can't be handled as one | |
2253 | charset. So, in Emacs, Big5 is divided into two: `charset-big5-1' | |
2254 | and `charset-big5-2'. Both are DIMENSION2 and CHARS94. The former | |
2255 | contains frequently used characters and the latter contains less | |
2256 | frequently used characters. */ | |
2257 | ||
2258 | /* Macros to decode or encode a character of Big5 in BIG5. B1 and B2 | |
2259 | are the 1st and 2nd position-codes of Big5 in BIG5 coding system. | |
2260 | C1 and C2 are the 1st and 2nd position-codes of of Emacs' internal | |
2261 | format. CHARSET is `charset_big5_1' or `charset_big5_2'. */ | |
2262 | ||
2263 | /* Number of Big5 characters which have the same code in 1st byte. */ | |
2264 | #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40) | |
2265 | ||
2266 | #define DECODE_BIG5(b1, b2, charset, c1, c2) \ | |
2267 | do { \ | |
2268 | unsigned int temp \ | |
2269 | = (b1 - 0xA1) * BIG5_SAME_ROW + b2 - (b2 < 0x7F ? 0x40 : 0x62); \ | |
2270 | if (b1 < 0xC9) \ | |
2271 | charset = charset_big5_1; \ | |
2272 | else \ | |
2273 | { \ | |
2274 | charset = charset_big5_2; \ | |
2275 | temp -= (0xC9 - 0xA1) * BIG5_SAME_ROW; \ | |
2276 | } \ | |
2277 | c1 = temp / (0xFF - 0xA1) + 0x21; \ | |
2278 | c2 = temp % (0xFF - 0xA1) + 0x21; \ | |
2279 | } while (0) | |
2280 | ||
2281 | #define ENCODE_BIG5(charset, c1, c2, b1, b2) \ | |
2282 | do { \ | |
2283 | unsigned int temp = (c1 - 0x21) * (0xFF - 0xA1) + (c2 - 0x21); \ | |
2284 | if (charset == charset_big5_2) \ | |
2285 | temp += BIG5_SAME_ROW * (0xC9 - 0xA1); \ | |
2286 | b1 = temp / BIG5_SAME_ROW + 0xA1; \ | |
2287 | b2 = temp % BIG5_SAME_ROW; \ | |
2288 | b2 += b2 < 0x3F ? 0x40 : 0x62; \ | |
2289 | } while (0) | |
2290 | ||
2291 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2292 | Check if a text is encoded in SJIS. If it is, return | |
2293 | CODING_CATEGORY_MASK_SJIS, else return 0. */ | |
2294 | ||
2295 | int | |
2296 | detect_coding_sjis (src, src_end) | |
2297 | unsigned char *src, *src_end; | |
2298 | { | |
b73bfc1c KH |
2299 | int c; |
2300 | /* Dummy for ONE_MORE_BYTE. */ | |
2301 | struct coding_system dummy_coding; | |
2302 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 2303 | |
b73bfc1c | 2304 | while (1) |
4ed46869 | 2305 | { |
b73bfc1c | 2306 | ONE_MORE_BYTE (c); |
fd6f711b | 2307 | if (c >= 0x81) |
4ed46869 | 2308 | { |
fd6f711b KH |
2309 | if (c <= 0x9F || (c >= 0xE0 && c <= 0xEF)) |
2310 | { | |
2311 | ONE_MORE_BYTE (c); | |
2312 | if (c < 0x40 || c == 0x7F || c > 0xFC) | |
2313 | return 0; | |
2314 | } | |
2315 | else if (c > 0xDF) | |
4ed46869 KH |
2316 | return 0; |
2317 | } | |
2318 | } | |
b73bfc1c | 2319 | label_end_of_loop: |
4ed46869 KH |
2320 | return CODING_CATEGORY_MASK_SJIS; |
2321 | } | |
2322 | ||
2323 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2324 | Check if a text is encoded in BIG5. If it is, return | |
2325 | CODING_CATEGORY_MASK_BIG5, else return 0. */ | |
2326 | ||
2327 | int | |
2328 | detect_coding_big5 (src, src_end) | |
2329 | unsigned char *src, *src_end; | |
2330 | { | |
b73bfc1c KH |
2331 | int c; |
2332 | /* Dummy for ONE_MORE_BYTE. */ | |
2333 | struct coding_system dummy_coding; | |
2334 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 2335 | |
b73bfc1c | 2336 | while (1) |
4ed46869 | 2337 | { |
b73bfc1c | 2338 | ONE_MORE_BYTE (c); |
4ed46869 KH |
2339 | if (c >= 0xA1) |
2340 | { | |
b73bfc1c | 2341 | ONE_MORE_BYTE (c); |
4ed46869 KH |
2342 | if (c < 0x40 || (c >= 0x7F && c <= 0xA0)) |
2343 | return 0; | |
2344 | } | |
2345 | } | |
b73bfc1c | 2346 | label_end_of_loop: |
4ed46869 KH |
2347 | return CODING_CATEGORY_MASK_BIG5; |
2348 | } | |
2349 | ||
fa42c37f KH |
2350 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
2351 | Check if a text is encoded in UTF-8. If it is, return | |
2352 | CODING_CATEGORY_MASK_UTF_8, else return 0. */ | |
2353 | ||
2354 | #define UTF_8_1_OCTET_P(c) ((c) < 0x80) | |
2355 | #define UTF_8_EXTRA_OCTET_P(c) (((c) & 0xC0) == 0x80) | |
2356 | #define UTF_8_2_OCTET_LEADING_P(c) (((c) & 0xE0) == 0xC0) | |
2357 | #define UTF_8_3_OCTET_LEADING_P(c) (((c) & 0xF0) == 0xE0) | |
2358 | #define UTF_8_4_OCTET_LEADING_P(c) (((c) & 0xF8) == 0xF0) | |
2359 | #define UTF_8_5_OCTET_LEADING_P(c) (((c) & 0xFC) == 0xF8) | |
2360 | #define UTF_8_6_OCTET_LEADING_P(c) (((c) & 0xFE) == 0xFC) | |
2361 | ||
2362 | int | |
2363 | detect_coding_utf_8 (src, src_end) | |
2364 | unsigned char *src, *src_end; | |
2365 | { | |
2366 | unsigned char c; | |
2367 | int seq_maybe_bytes; | |
b73bfc1c KH |
2368 | /* Dummy for ONE_MORE_BYTE. */ |
2369 | struct coding_system dummy_coding; | |
2370 | struct coding_system *coding = &dummy_coding; | |
fa42c37f | 2371 | |
b73bfc1c | 2372 | while (1) |
fa42c37f | 2373 | { |
b73bfc1c | 2374 | ONE_MORE_BYTE (c); |
fa42c37f KH |
2375 | if (UTF_8_1_OCTET_P (c)) |
2376 | continue; | |
2377 | else if (UTF_8_2_OCTET_LEADING_P (c)) | |
2378 | seq_maybe_bytes = 1; | |
2379 | else if (UTF_8_3_OCTET_LEADING_P (c)) | |
2380 | seq_maybe_bytes = 2; | |
2381 | else if (UTF_8_4_OCTET_LEADING_P (c)) | |
2382 | seq_maybe_bytes = 3; | |
2383 | else if (UTF_8_5_OCTET_LEADING_P (c)) | |
2384 | seq_maybe_bytes = 4; | |
2385 | else if (UTF_8_6_OCTET_LEADING_P (c)) | |
2386 | seq_maybe_bytes = 5; | |
2387 | else | |
2388 | return 0; | |
2389 | ||
2390 | do | |
2391 | { | |
b73bfc1c | 2392 | ONE_MORE_BYTE (c); |
fa42c37f KH |
2393 | if (!UTF_8_EXTRA_OCTET_P (c)) |
2394 | return 0; | |
2395 | seq_maybe_bytes--; | |
2396 | } | |
2397 | while (seq_maybe_bytes > 0); | |
2398 | } | |
2399 | ||
b73bfc1c | 2400 | label_end_of_loop: |
fa42c37f KH |
2401 | return CODING_CATEGORY_MASK_UTF_8; |
2402 | } | |
2403 | ||
2404 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2405 | Check if a text is encoded in UTF-16 Big Endian (endian == 1) or | |
2406 | Little Endian (otherwise). If it is, return | |
2407 | CODING_CATEGORY_MASK_UTF_16_BE or CODING_CATEGORY_MASK_UTF_16_LE, | |
2408 | else return 0. */ | |
2409 | ||
2410 | #define UTF_16_INVALID_P(val) \ | |
2411 | (((val) == 0xFFFE) \ | |
2412 | || ((val) == 0xFFFF)) | |
2413 | ||
2414 | #define UTF_16_HIGH_SURROGATE_P(val) \ | |
2415 | (((val) & 0xD800) == 0xD800) | |
2416 | ||
2417 | #define UTF_16_LOW_SURROGATE_P(val) \ | |
2418 | (((val) & 0xDC00) == 0xDC00) | |
2419 | ||
2420 | int | |
2421 | detect_coding_utf_16 (src, src_end) | |
2422 | unsigned char *src, *src_end; | |
2423 | { | |
b73bfc1c KH |
2424 | unsigned char c1, c2; |
2425 | /* Dummy for TWO_MORE_BYTES. */ | |
2426 | struct coding_system dummy_coding; | |
2427 | struct coding_system *coding = &dummy_coding; | |
fa42c37f | 2428 | |
b73bfc1c KH |
2429 | TWO_MORE_BYTES (c1, c2); |
2430 | ||
2431 | if ((c1 == 0xFF) && (c2 == 0xFE)) | |
fa42c37f | 2432 | return CODING_CATEGORY_MASK_UTF_16_LE; |
b73bfc1c | 2433 | else if ((c1 == 0xFE) && (c2 == 0xFF)) |
fa42c37f KH |
2434 | return CODING_CATEGORY_MASK_UTF_16_BE; |
2435 | ||
b73bfc1c | 2436 | label_end_of_loop: |
fa42c37f KH |
2437 | return 0; |
2438 | } | |
2439 | ||
4ed46869 KH |
2440 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". |
2441 | If SJIS_P is 1, decode SJIS text, else decode BIG5 test. */ | |
2442 | ||
b73bfc1c | 2443 | static void |
4ed46869 | 2444 | decode_coding_sjis_big5 (coding, source, destination, |
d46c5b12 | 2445 | src_bytes, dst_bytes, sjis_p) |
4ed46869 KH |
2446 | struct coding_system *coding; |
2447 | unsigned char *source, *destination; | |
2448 | int src_bytes, dst_bytes; | |
4ed46869 KH |
2449 | int sjis_p; |
2450 | { | |
2451 | unsigned char *src = source; | |
2452 | unsigned char *src_end = source + src_bytes; | |
2453 | unsigned char *dst = destination; | |
2454 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c KH |
2455 | /* SRC_BASE remembers the start position in source in each loop. |
2456 | The loop will be exited when there's not enough source code | |
2457 | (within macro ONE_MORE_BYTE), or when there's not enough | |
2458 | destination area to produce a character (within macro | |
2459 | EMIT_CHAR). */ | |
2460 | unsigned char *src_base; | |
2461 | Lisp_Object translation_table; | |
a5d301df | 2462 | |
b73bfc1c KH |
2463 | if (NILP (Venable_character_translation)) |
2464 | translation_table = Qnil; | |
2465 | else | |
2466 | { | |
2467 | translation_table = coding->translation_table_for_decode; | |
2468 | if (NILP (translation_table)) | |
2469 | translation_table = Vstandard_translation_table_for_decode; | |
2470 | } | |
4ed46869 | 2471 | |
d46c5b12 | 2472 | coding->produced_char = 0; |
b73bfc1c | 2473 | while (1) |
4ed46869 | 2474 | { |
b73bfc1c KH |
2475 | int c, charset, c1, c2; |
2476 | ||
2477 | src_base = src; | |
2478 | ONE_MORE_BYTE (c1); | |
2479 | ||
2480 | if (c1 < 0x80) | |
4ed46869 | 2481 | { |
b73bfc1c KH |
2482 | charset = CHARSET_ASCII; |
2483 | if (c1 < 0x20) | |
4ed46869 | 2484 | { |
b73bfc1c | 2485 | if (c1 == '\r') |
d46c5b12 | 2486 | { |
b73bfc1c | 2487 | if (coding->eol_type == CODING_EOL_CRLF) |
d46c5b12 | 2488 | { |
b73bfc1c KH |
2489 | ONE_MORE_BYTE (c2); |
2490 | if (c2 == '\n') | |
2491 | c1 = c2; | |
2492 | else if (coding->mode | |
2493 | & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
2494 | { | |
2495 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
2496 | goto label_end_of_loop; | |
2497 | } | |
2498 | else | |
2499 | /* To process C2 again, SRC is subtracted by 1. */ | |
2500 | src--; | |
d46c5b12 | 2501 | } |
b73bfc1c KH |
2502 | else if (coding->eol_type == CODING_EOL_CR) |
2503 | c1 = '\n'; | |
2504 | } | |
2505 | else if (c1 == '\n' | |
2506 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
2507 | && (coding->eol_type == CODING_EOL_CR | |
2508 | || coding->eol_type == CODING_EOL_CRLF)) | |
2509 | { | |
2510 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
2511 | goto label_end_of_loop; | |
d46c5b12 | 2512 | } |
4ed46869 | 2513 | } |
4ed46869 | 2514 | } |
54f78171 | 2515 | else |
b73bfc1c | 2516 | { |
4ed46869 KH |
2517 | if (sjis_p) |
2518 | { | |
b73bfc1c KH |
2519 | if (c1 >= 0xF0) |
2520 | goto label_invalid_code; | |
2521 | if (c1 < 0xA0 || c1 >= 0xE0) | |
fb88bf2d | 2522 | { |
54f78171 KH |
2523 | /* SJIS -> JISX0208 */ |
2524 | ONE_MORE_BYTE (c2); | |
b73bfc1c KH |
2525 | if (c2 < 0x40 || c2 == 0x7F || c2 > 0xFC) |
2526 | goto label_invalid_code; | |
2527 | DECODE_SJIS (c1, c2, c1, c2); | |
2528 | charset = charset_jisx0208; | |
5e34de15 | 2529 | } |
fb88bf2d | 2530 | else |
b73bfc1c KH |
2531 | /* SJIS -> JISX0201-Kana */ |
2532 | charset = charset_katakana_jisx0201; | |
4ed46869 | 2533 | } |
fb88bf2d | 2534 | else |
fb88bf2d | 2535 | { |
54f78171 | 2536 | /* BIG5 -> Big5 */ |
b73bfc1c KH |
2537 | if (c1 < 0xA1 || c1 > 0xFE) |
2538 | goto label_invalid_code; | |
2539 | ONE_MORE_BYTE (c2); | |
2540 | if (c2 < 0x40 || (c2 > 0x7E && c2 < 0xA1) || c2 > 0xFE) | |
2541 | goto label_invalid_code; | |
2542 | DECODE_BIG5 (c1, c2, charset, c1, c2); | |
4ed46869 KH |
2543 | } |
2544 | } | |
4ed46869 | 2545 | |
b73bfc1c KH |
2546 | c = DECODE_ISO_CHARACTER (charset, c1, c2); |
2547 | EMIT_CHAR (c); | |
fb88bf2d KH |
2548 | continue; |
2549 | ||
b73bfc1c KH |
2550 | label_invalid_code: |
2551 | coding->errors++; | |
4ed46869 | 2552 | src = src_base; |
b73bfc1c KH |
2553 | c = *src++; |
2554 | EMIT_CHAR (c); | |
fb88bf2d | 2555 | } |
d46c5b12 | 2556 | |
b73bfc1c KH |
2557 | label_end_of_loop: |
2558 | coding->consumed = coding->consumed_char = src_base - source; | |
d46c5b12 | 2559 | coding->produced = dst - destination; |
b73bfc1c | 2560 | return; |
4ed46869 KH |
2561 | } |
2562 | ||
2563 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". | |
b73bfc1c KH |
2564 | This function can encode charsets `ascii', `katakana-jisx0201', |
2565 | `japanese-jisx0208', `chinese-big5-1', and `chinese-big5-2'. We | |
2566 | are sure that all these charsets are registered as official charset | |
4ed46869 KH |
2567 | (i.e. do not have extended leading-codes). Characters of other |
2568 | charsets are produced without any encoding. If SJIS_P is 1, encode | |
2569 | SJIS text, else encode BIG5 text. */ | |
2570 | ||
b73bfc1c | 2571 | static void |
4ed46869 | 2572 | encode_coding_sjis_big5 (coding, source, destination, |
d46c5b12 | 2573 | src_bytes, dst_bytes, sjis_p) |
4ed46869 KH |
2574 | struct coding_system *coding; |
2575 | unsigned char *source, *destination; | |
2576 | int src_bytes, dst_bytes; | |
4ed46869 KH |
2577 | int sjis_p; |
2578 | { | |
2579 | unsigned char *src = source; | |
2580 | unsigned char *src_end = source + src_bytes; | |
2581 | unsigned char *dst = destination; | |
2582 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c KH |
2583 | /* SRC_BASE remembers the start position in source in each loop. |
2584 | The loop will be exited when there's not enough source text to | |
2585 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
2586 | there's not enough destination area to produce encoded codes | |
2587 | (within macro EMIT_BYTES). */ | |
2588 | unsigned char *src_base; | |
2589 | Lisp_Object translation_table; | |
4ed46869 | 2590 | |
b73bfc1c KH |
2591 | if (NILP (Venable_character_translation)) |
2592 | translation_table = Qnil; | |
2593 | else | |
4ed46869 | 2594 | { |
39658efc | 2595 | translation_table = coding->translation_table_for_encode; |
b73bfc1c | 2596 | if (NILP (translation_table)) |
39658efc | 2597 | translation_table = Vstandard_translation_table_for_encode; |
b73bfc1c | 2598 | } |
a5d301df | 2599 | |
b73bfc1c KH |
2600 | while (1) |
2601 | { | |
2602 | int c, charset, c1, c2; | |
4ed46869 | 2603 | |
b73bfc1c KH |
2604 | src_base = src; |
2605 | ONE_MORE_CHAR (c); | |
2606 | ||
2607 | /* Now encode the character C. */ | |
2608 | if (SINGLE_BYTE_CHAR_P (c)) | |
2609 | { | |
2610 | switch (c) | |
4ed46869 | 2611 | { |
b73bfc1c KH |
2612 | case '\r': |
2613 | if (!coding->mode & CODING_MODE_SELECTIVE_DISPLAY) | |
2614 | { | |
2615 | EMIT_ONE_BYTE (c); | |
2616 | break; | |
2617 | } | |
2618 | c = '\n'; | |
2619 | case '\n': | |
2620 | if (coding->eol_type == CODING_EOL_CRLF) | |
2621 | { | |
2622 | EMIT_TWO_BYTES ('\r', c); | |
2623 | break; | |
2624 | } | |
2625 | else if (coding->eol_type == CODING_EOL_CR) | |
2626 | c = '\r'; | |
2627 | default: | |
2628 | EMIT_ONE_BYTE (c); | |
2629 | } | |
2630 | } | |
2631 | else | |
2632 | { | |
2633 | SPLIT_CHAR (c, charset, c1, c2); | |
2634 | if (sjis_p) | |
2635 | { | |
2636 | if (charset == charset_jisx0208 | |
2637 | || charset == charset_jisx0208_1978) | |
2638 | { | |
2639 | ENCODE_SJIS (c1, c2, c1, c2); | |
2640 | EMIT_TWO_BYTES (c1, c2); | |
2641 | } | |
39658efc KH |
2642 | else if (charset == charset_katakana_jisx0201) |
2643 | EMIT_ONE_BYTE (c1 | 0x80); | |
fc53a214 KH |
2644 | else if (charset == charset_latin_jisx0201) |
2645 | EMIT_ONE_BYTE (c1); | |
b73bfc1c KH |
2646 | else |
2647 | /* There's no way other than producing the internal | |
2648 | codes as is. */ | |
2649 | EMIT_BYTES (src_base, src); | |
4ed46869 | 2650 | } |
4ed46869 | 2651 | else |
b73bfc1c KH |
2652 | { |
2653 | if (charset == charset_big5_1 || charset == charset_big5_2) | |
2654 | { | |
2655 | ENCODE_BIG5 (charset, c1, c2, c1, c2); | |
2656 | EMIT_TWO_BYTES (c1, c2); | |
2657 | } | |
2658 | else | |
2659 | /* There's no way other than producing the internal | |
2660 | codes as is. */ | |
2661 | EMIT_BYTES (src_base, src); | |
2662 | } | |
4ed46869 | 2663 | } |
b73bfc1c | 2664 | coding->consumed_char++; |
4ed46869 KH |
2665 | } |
2666 | ||
b73bfc1c KH |
2667 | label_end_of_loop: |
2668 | coding->consumed = src_base - source; | |
d46c5b12 | 2669 | coding->produced = coding->produced_char = dst - destination; |
4ed46869 KH |
2670 | } |
2671 | ||
2672 | \f | |
1397dc18 KH |
2673 | /*** 5. CCL handlers ***/ |
2674 | ||
2675 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2676 | Check if a text is encoded in a coding system of which | |
2677 | encoder/decoder are written in CCL program. If it is, return | |
2678 | CODING_CATEGORY_MASK_CCL, else return 0. */ | |
2679 | ||
2680 | int | |
2681 | detect_coding_ccl (src, src_end) | |
2682 | unsigned char *src, *src_end; | |
2683 | { | |
2684 | unsigned char *valid; | |
b73bfc1c KH |
2685 | int c; |
2686 | /* Dummy for ONE_MORE_BYTE. */ | |
2687 | struct coding_system dummy_coding; | |
2688 | struct coding_system *coding = &dummy_coding; | |
1397dc18 KH |
2689 | |
2690 | /* No coding system is assigned to coding-category-ccl. */ | |
2691 | if (!coding_system_table[CODING_CATEGORY_IDX_CCL]) | |
2692 | return 0; | |
2693 | ||
2694 | valid = coding_system_table[CODING_CATEGORY_IDX_CCL]->spec.ccl.valid_codes; | |
b73bfc1c | 2695 | while (1) |
1397dc18 | 2696 | { |
b73bfc1c KH |
2697 | ONE_MORE_BYTE (c); |
2698 | if (! valid[c]) | |
2699 | return 0; | |
1397dc18 | 2700 | } |
b73bfc1c | 2701 | label_end_of_loop: |
1397dc18 KH |
2702 | return CODING_CATEGORY_MASK_CCL; |
2703 | } | |
2704 | ||
2705 | \f | |
2706 | /*** 6. End-of-line handlers ***/ | |
4ed46869 | 2707 | |
b73bfc1c | 2708 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
4ed46869 | 2709 | |
b73bfc1c | 2710 | static void |
d46c5b12 | 2711 | decode_eol (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
2712 | struct coding_system *coding; |
2713 | unsigned char *source, *destination; | |
2714 | int src_bytes, dst_bytes; | |
4ed46869 KH |
2715 | { |
2716 | unsigned char *src = source; | |
4ed46869 | 2717 | unsigned char *dst = destination; |
b73bfc1c KH |
2718 | unsigned char *src_end = src + src_bytes; |
2719 | unsigned char *dst_end = dst + dst_bytes; | |
2720 | Lisp_Object translation_table; | |
2721 | /* SRC_BASE remembers the start position in source in each loop. | |
2722 | The loop will be exited when there's not enough source code | |
2723 | (within macro ONE_MORE_BYTE), or when there's not enough | |
2724 | destination area to produce a character (within macro | |
2725 | EMIT_CHAR). */ | |
2726 | unsigned char *src_base; | |
2727 | int c; | |
2728 | ||
2729 | translation_table = Qnil; | |
4ed46869 KH |
2730 | switch (coding->eol_type) |
2731 | { | |
2732 | case CODING_EOL_CRLF: | |
b73bfc1c | 2733 | while (1) |
d46c5b12 | 2734 | { |
b73bfc1c KH |
2735 | src_base = src; |
2736 | ONE_MORE_BYTE (c); | |
2737 | if (c == '\r') | |
fb88bf2d | 2738 | { |
b73bfc1c KH |
2739 | ONE_MORE_BYTE (c); |
2740 | if (c != '\n') | |
2741 | { | |
2742 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
2743 | { | |
2744 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
2745 | goto label_end_of_loop; | |
2746 | } | |
2747 | src--; | |
2748 | c = '\r'; | |
2749 | } | |
fb88bf2d | 2750 | } |
b73bfc1c KH |
2751 | else if (c == '\n' |
2752 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL)) | |
d46c5b12 | 2753 | { |
b73bfc1c KH |
2754 | coding->result = CODING_FINISH_INCONSISTENT_EOL; |
2755 | goto label_end_of_loop; | |
d46c5b12 | 2756 | } |
b73bfc1c | 2757 | EMIT_CHAR (c); |
d46c5b12 | 2758 | } |
b73bfc1c KH |
2759 | break; |
2760 | ||
2761 | case CODING_EOL_CR: | |
2762 | while (1) | |
d46c5b12 | 2763 | { |
b73bfc1c KH |
2764 | src_base = src; |
2765 | ONE_MORE_BYTE (c); | |
2766 | if (c == '\n') | |
2767 | { | |
2768 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
2769 | { | |
2770 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
2771 | goto label_end_of_loop; | |
2772 | } | |
2773 | } | |
2774 | else if (c == '\r') | |
2775 | c = '\n'; | |
2776 | EMIT_CHAR (c); | |
d46c5b12 | 2777 | } |
4ed46869 KH |
2778 | break; |
2779 | ||
b73bfc1c KH |
2780 | default: /* no need for EOL handling */ |
2781 | while (1) | |
d46c5b12 | 2782 | { |
b73bfc1c KH |
2783 | src_base = src; |
2784 | ONE_MORE_BYTE (c); | |
2785 | EMIT_CHAR (c); | |
d46c5b12 | 2786 | } |
4ed46869 KH |
2787 | } |
2788 | ||
b73bfc1c KH |
2789 | label_end_of_loop: |
2790 | coding->consumed = coding->consumed_char = src_base - source; | |
2791 | coding->produced = dst - destination; | |
2792 | return; | |
4ed46869 KH |
2793 | } |
2794 | ||
2795 | /* See "GENERAL NOTES about `encode_coding_XXX ()' functions". Encode | |
b73bfc1c KH |
2796 | format of end-of-line according to `coding->eol_type'. It also |
2797 | convert multibyte form 8-bit characers to unibyte if | |
2798 | CODING->src_multibyte is nonzero. If `coding->mode & | |
2799 | CODING_MODE_SELECTIVE_DISPLAY' is nonzero, code '\r' in source text | |
2800 | also means end-of-line. */ | |
4ed46869 | 2801 | |
b73bfc1c | 2802 | static void |
d46c5b12 | 2803 | encode_eol (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
2804 | struct coding_system *coding; |
2805 | unsigned char *source, *destination; | |
2806 | int src_bytes, dst_bytes; | |
4ed46869 KH |
2807 | { |
2808 | unsigned char *src = source; | |
2809 | unsigned char *dst = destination; | |
b73bfc1c KH |
2810 | unsigned char *src_end = src + src_bytes; |
2811 | unsigned char *dst_end = dst + dst_bytes; | |
2812 | Lisp_Object translation_table; | |
2813 | /* SRC_BASE remembers the start position in source in each loop. | |
2814 | The loop will be exited when there's not enough source text to | |
2815 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
2816 | there's not enough destination area to produce encoded codes | |
2817 | (within macro EMIT_BYTES). */ | |
2818 | unsigned char *src_base; | |
2819 | int c; | |
2820 | int selective_display = coding->mode & CODING_MODE_SELECTIVE_DISPLAY; | |
2821 | ||
2822 | translation_table = Qnil; | |
2823 | if (coding->src_multibyte | |
2824 | && *(src_end - 1) == LEADING_CODE_8_BIT_CONTROL) | |
2825 | { | |
2826 | src_end--; | |
2827 | src_bytes--; | |
2828 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; | |
2829 | } | |
fb88bf2d | 2830 | |
d46c5b12 KH |
2831 | if (coding->eol_type == CODING_EOL_CRLF) |
2832 | { | |
b73bfc1c | 2833 | while (src < src_end) |
d46c5b12 | 2834 | { |
b73bfc1c | 2835 | src_base = src; |
d46c5b12 | 2836 | c = *src++; |
b73bfc1c KH |
2837 | if (c >= 0x20) |
2838 | EMIT_ONE_BYTE (c); | |
2839 | else if (c == '\n' || (c == '\r' && selective_display)) | |
2840 | EMIT_TWO_BYTES ('\r', '\n'); | |
d46c5b12 | 2841 | else |
b73bfc1c | 2842 | EMIT_ONE_BYTE (c); |
d46c5b12 | 2843 | } |
ff2b1ea9 | 2844 | src_base = src; |
b73bfc1c | 2845 | label_end_of_loop: |
005f0d35 | 2846 | ; |
d46c5b12 KH |
2847 | } |
2848 | else | |
4ed46869 | 2849 | { |
78a629d2 | 2850 | if (!dst_bytes || src_bytes <= dst_bytes) |
4ed46869 | 2851 | { |
b73bfc1c KH |
2852 | safe_bcopy (src, dst, src_bytes); |
2853 | src_base = src_end; | |
2854 | dst += src_bytes; | |
d46c5b12 | 2855 | } |
d46c5b12 | 2856 | else |
b73bfc1c KH |
2857 | { |
2858 | if (coding->src_multibyte | |
2859 | && *(src + dst_bytes - 1) == LEADING_CODE_8_BIT_CONTROL) | |
2860 | dst_bytes--; | |
2861 | safe_bcopy (src, dst, dst_bytes); | |
2862 | src_base = src + dst_bytes; | |
2863 | dst = destination + dst_bytes; | |
2864 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
2865 | } | |
993824c9 | 2866 | if (coding->eol_type == CODING_EOL_CR) |
d46c5b12 | 2867 | { |
b73bfc1c KH |
2868 | for (src = destination; src < dst; src++) |
2869 | if (*src == '\n') *src = '\r'; | |
d46c5b12 | 2870 | } |
b73bfc1c | 2871 | else if (selective_display) |
d46c5b12 | 2872 | { |
b73bfc1c KH |
2873 | for (src = destination; src < dst; src++) |
2874 | if (*src == '\r') *src = '\n'; | |
4ed46869 | 2875 | } |
4ed46869 | 2876 | } |
b73bfc1c KH |
2877 | if (coding->src_multibyte) |
2878 | dst = destination + str_as_unibyte (destination, dst - destination); | |
4ed46869 | 2879 | |
b73bfc1c KH |
2880 | coding->consumed = src_base - source; |
2881 | coding->produced = dst - destination; | |
78a629d2 | 2882 | coding->produced_char = coding->produced; |
4ed46869 KH |
2883 | } |
2884 | ||
2885 | \f | |
1397dc18 | 2886 | /*** 7. C library functions ***/ |
4ed46869 KH |
2887 | |
2888 | /* In Emacs Lisp, coding system is represented by a Lisp symbol which | |
2889 | has a property `coding-system'. The value of this property is a | |
2890 | vector of length 5 (called as coding-vector). Among elements of | |
2891 | this vector, the first (element[0]) and the fifth (element[4]) | |
2892 | carry important information for decoding/encoding. Before | |
2893 | decoding/encoding, this information should be set in fields of a | |
2894 | structure of type `coding_system'. | |
2895 | ||
2896 | A value of property `coding-system' can be a symbol of another | |
2897 | subsidiary coding-system. In that case, Emacs gets coding-vector | |
2898 | from that symbol. | |
2899 | ||
2900 | `element[0]' contains information to be set in `coding->type'. The | |
2901 | value and its meaning is as follows: | |
2902 | ||
0ef69138 KH |
2903 | 0 -- coding_type_emacs_mule |
2904 | 1 -- coding_type_sjis | |
2905 | 2 -- coding_type_iso2022 | |
2906 | 3 -- coding_type_big5 | |
2907 | 4 -- coding_type_ccl encoder/decoder written in CCL | |
2908 | nil -- coding_type_no_conversion | |
2909 | t -- coding_type_undecided (automatic conversion on decoding, | |
2910 | no-conversion on encoding) | |
4ed46869 KH |
2911 | |
2912 | `element[4]' contains information to be set in `coding->flags' and | |
2913 | `coding->spec'. The meaning varies by `coding->type'. | |
2914 | ||
2915 | If `coding->type' is `coding_type_iso2022', element[4] is a vector | |
2916 | of length 32 (of which the first 13 sub-elements are used now). | |
2917 | Meanings of these sub-elements are: | |
2918 | ||
2919 | sub-element[N] where N is 0 through 3: to be set in `coding->spec.iso2022' | |
2920 | If the value is an integer of valid charset, the charset is | |
2921 | assumed to be designated to graphic register N initially. | |
2922 | ||
2923 | If the value is minus, it is a minus value of charset which | |
2924 | reserves graphic register N, which means that the charset is | |
2925 | not designated initially but should be designated to graphic | |
2926 | register N just before encoding a character in that charset. | |
2927 | ||
2928 | If the value is nil, graphic register N is never used on | |
2929 | encoding. | |
2930 | ||
2931 | sub-element[N] where N is 4 through 11: to be set in `coding->flags' | |
2932 | Each value takes t or nil. See the section ISO2022 of | |
2933 | `coding.h' for more information. | |
2934 | ||
2935 | If `coding->type' is `coding_type_big5', element[4] is t to denote | |
2936 | BIG5-ETen or nil to denote BIG5-HKU. | |
2937 | ||
2938 | If `coding->type' takes the other value, element[4] is ignored. | |
2939 | ||
2940 | Emacs Lisp's coding system also carries information about format of | |
2941 | end-of-line in a value of property `eol-type'. If the value is | |
2942 | integer, 0 means CODING_EOL_LF, 1 means CODING_EOL_CRLF, and 2 | |
2943 | means CODING_EOL_CR. If it is not integer, it should be a vector | |
2944 | of subsidiary coding systems of which property `eol-type' has one | |
2945 | of above values. | |
2946 | ||
2947 | */ | |
2948 | ||
2949 | /* Extract information for decoding/encoding from CODING_SYSTEM_SYMBOL | |
2950 | and set it in CODING. If CODING_SYSTEM_SYMBOL is invalid, CODING | |
2951 | is setup so that no conversion is necessary and return -1, else | |
2952 | return 0. */ | |
2953 | ||
2954 | int | |
e0e989f6 KH |
2955 | setup_coding_system (coding_system, coding) |
2956 | Lisp_Object coding_system; | |
4ed46869 KH |
2957 | struct coding_system *coding; |
2958 | { | |
d46c5b12 | 2959 | Lisp_Object coding_spec, coding_type, eol_type, plist; |
4608c386 | 2960 | Lisp_Object val; |
70c22245 | 2961 | int i; |
4ed46869 | 2962 | |
d46c5b12 | 2963 | /* Initialize some fields required for all kinds of coding systems. */ |
774324d6 | 2964 | coding->symbol = coding_system; |
d46c5b12 KH |
2965 | coding->common_flags = 0; |
2966 | coding->mode = 0; | |
2967 | coding->heading_ascii = -1; | |
2968 | coding->post_read_conversion = coding->pre_write_conversion = Qnil; | |
ec6d2bb8 KH |
2969 | coding->composing = COMPOSITION_DISABLED; |
2970 | coding->cmp_data = NULL; | |
1f5dbf34 KH |
2971 | |
2972 | if (NILP (coding_system)) | |
2973 | goto label_invalid_coding_system; | |
2974 | ||
4608c386 | 2975 | coding_spec = Fget (coding_system, Qcoding_system); |
1f5dbf34 | 2976 | |
4608c386 KH |
2977 | if (!VECTORP (coding_spec) |
2978 | || XVECTOR (coding_spec)->size != 5 | |
2979 | || !CONSP (XVECTOR (coding_spec)->contents[3])) | |
4ed46869 | 2980 | goto label_invalid_coding_system; |
4608c386 | 2981 | |
d46c5b12 KH |
2982 | eol_type = inhibit_eol_conversion ? Qnil : Fget (coding_system, Qeol_type); |
2983 | if (VECTORP (eol_type)) | |
2984 | { | |
2985 | coding->eol_type = CODING_EOL_UNDECIDED; | |
2986 | coding->common_flags = CODING_REQUIRE_DETECTION_MASK; | |
2987 | } | |
2988 | else if (XFASTINT (eol_type) == 1) | |
2989 | { | |
2990 | coding->eol_type = CODING_EOL_CRLF; | |
2991 | coding->common_flags | |
2992 | = CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
2993 | } | |
2994 | else if (XFASTINT (eol_type) == 2) | |
2995 | { | |
2996 | coding->eol_type = CODING_EOL_CR; | |
2997 | coding->common_flags | |
2998 | = CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
2999 | } | |
3000 | else | |
3001 | coding->eol_type = CODING_EOL_LF; | |
3002 | ||
3003 | coding_type = XVECTOR (coding_spec)->contents[0]; | |
3004 | /* Try short cut. */ | |
3005 | if (SYMBOLP (coding_type)) | |
3006 | { | |
3007 | if (EQ (coding_type, Qt)) | |
3008 | { | |
3009 | coding->type = coding_type_undecided; | |
3010 | coding->common_flags |= CODING_REQUIRE_DETECTION_MASK; | |
3011 | } | |
3012 | else | |
3013 | coding->type = coding_type_no_conversion; | |
3014 | return 0; | |
3015 | } | |
3016 | ||
d46c5b12 KH |
3017 | /* Get values of coding system properties: |
3018 | `post-read-conversion', `pre-write-conversion', | |
f967223b | 3019 | `translation-table-for-decode', `translation-table-for-encode'. */ |
4608c386 | 3020 | plist = XVECTOR (coding_spec)->contents[3]; |
b843d1ae KH |
3021 | /* Pre & post conversion functions should be disabled if |
3022 | inhibit_eol_conversion is nozero. This is the case that a code | |
3023 | conversion function is called while those functions are running. */ | |
3024 | if (! inhibit_pre_post_conversion) | |
3025 | { | |
3026 | coding->post_read_conversion = Fplist_get (plist, Qpost_read_conversion); | |
3027 | coding->pre_write_conversion = Fplist_get (plist, Qpre_write_conversion); | |
3028 | } | |
f967223b | 3029 | val = Fplist_get (plist, Qtranslation_table_for_decode); |
4608c386 | 3030 | if (SYMBOLP (val)) |
f967223b KH |
3031 | val = Fget (val, Qtranslation_table_for_decode); |
3032 | coding->translation_table_for_decode = CHAR_TABLE_P (val) ? val : Qnil; | |
3033 | val = Fplist_get (plist, Qtranslation_table_for_encode); | |
4608c386 | 3034 | if (SYMBOLP (val)) |
f967223b KH |
3035 | val = Fget (val, Qtranslation_table_for_encode); |
3036 | coding->translation_table_for_encode = CHAR_TABLE_P (val) ? val : Qnil; | |
d46c5b12 KH |
3037 | val = Fplist_get (plist, Qcoding_category); |
3038 | if (!NILP (val)) | |
3039 | { | |
3040 | val = Fget (val, Qcoding_category_index); | |
3041 | if (INTEGERP (val)) | |
3042 | coding->category_idx = XINT (val); | |
3043 | else | |
3044 | goto label_invalid_coding_system; | |
3045 | } | |
3046 | else | |
3047 | goto label_invalid_coding_system; | |
4608c386 | 3048 | |
ec6d2bb8 KH |
3049 | /* If the coding system has non-nil `composition' property, enable |
3050 | composition handling. */ | |
3051 | val = Fplist_get (plist, Qcomposition); | |
3052 | if (!NILP (val)) | |
3053 | coding->composing = COMPOSITION_NO; | |
3054 | ||
d46c5b12 | 3055 | switch (XFASTINT (coding_type)) |
4ed46869 KH |
3056 | { |
3057 | case 0: | |
0ef69138 | 3058 | coding->type = coding_type_emacs_mule; |
c952af22 KH |
3059 | if (!NILP (coding->post_read_conversion)) |
3060 | coding->common_flags |= CODING_REQUIRE_DECODING_MASK; | |
3061 | if (!NILP (coding->pre_write_conversion)) | |
3062 | coding->common_flags |= CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 KH |
3063 | break; |
3064 | ||
3065 | case 1: | |
3066 | coding->type = coding_type_sjis; | |
c952af22 KH |
3067 | coding->common_flags |
3068 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 KH |
3069 | break; |
3070 | ||
3071 | case 2: | |
3072 | coding->type = coding_type_iso2022; | |
c952af22 KH |
3073 | coding->common_flags |
3074 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3075 | { |
70c22245 | 3076 | Lisp_Object val, temp; |
4ed46869 | 3077 | Lisp_Object *flags; |
d46c5b12 | 3078 | int i, charset, reg_bits = 0; |
4ed46869 | 3079 | |
4608c386 | 3080 | val = XVECTOR (coding_spec)->contents[4]; |
f44d27ce | 3081 | |
4ed46869 KH |
3082 | if (!VECTORP (val) || XVECTOR (val)->size != 32) |
3083 | goto label_invalid_coding_system; | |
3084 | ||
3085 | flags = XVECTOR (val)->contents; | |
3086 | coding->flags | |
3087 | = ((NILP (flags[4]) ? 0 : CODING_FLAG_ISO_SHORT_FORM) | |
3088 | | (NILP (flags[5]) ? 0 : CODING_FLAG_ISO_RESET_AT_EOL) | |
3089 | | (NILP (flags[6]) ? 0 : CODING_FLAG_ISO_RESET_AT_CNTL) | |
3090 | | (NILP (flags[7]) ? 0 : CODING_FLAG_ISO_SEVEN_BITS) | |
3091 | | (NILP (flags[8]) ? 0 : CODING_FLAG_ISO_LOCKING_SHIFT) | |
3092 | | (NILP (flags[9]) ? 0 : CODING_FLAG_ISO_SINGLE_SHIFT) | |
3093 | | (NILP (flags[10]) ? 0 : CODING_FLAG_ISO_USE_ROMAN) | |
3094 | | (NILP (flags[11]) ? 0 : CODING_FLAG_ISO_USE_OLDJIS) | |
e0e989f6 KH |
3095 | | (NILP (flags[12]) ? 0 : CODING_FLAG_ISO_NO_DIRECTION) |
3096 | | (NILP (flags[13]) ? 0 : CODING_FLAG_ISO_INIT_AT_BOL) | |
c4825358 KH |
3097 | | (NILP (flags[14]) ? 0 : CODING_FLAG_ISO_DESIGNATE_AT_BOL) |
3098 | | (NILP (flags[15]) ? 0 : CODING_FLAG_ISO_SAFE) | |
3f003981 | 3099 | | (NILP (flags[16]) ? 0 : CODING_FLAG_ISO_LATIN_EXTRA) |
c4825358 | 3100 | ); |
4ed46869 KH |
3101 | |
3102 | /* Invoke graphic register 0 to plane 0. */ | |
3103 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; | |
3104 | /* Invoke graphic register 1 to plane 1 if we can use full 8-bit. */ | |
3105 | CODING_SPEC_ISO_INVOCATION (coding, 1) | |
3106 | = (coding->flags & CODING_FLAG_ISO_SEVEN_BITS ? -1 : 1); | |
3107 | /* Not single shifting at first. */ | |
6e85d753 | 3108 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; |
e0e989f6 | 3109 | /* Beginning of buffer should also be regarded as bol. */ |
6e85d753 | 3110 | CODING_SPEC_ISO_BOL (coding) = 1; |
4ed46869 | 3111 | |
70c22245 KH |
3112 | for (charset = 0; charset <= MAX_CHARSET; charset++) |
3113 | CODING_SPEC_ISO_REVISION_NUMBER (coding, charset) = 255; | |
3114 | val = Vcharset_revision_alist; | |
3115 | while (CONSP (val)) | |
3116 | { | |
03699b14 | 3117 | charset = get_charset_id (Fcar_safe (XCAR (val))); |
70c22245 | 3118 | if (charset >= 0 |
03699b14 | 3119 | && (temp = Fcdr_safe (XCAR (val)), INTEGERP (temp)) |
70c22245 KH |
3120 | && (i = XINT (temp), (i >= 0 && (i + '@') < 128))) |
3121 | CODING_SPEC_ISO_REVISION_NUMBER (coding, charset) = i; | |
03699b14 | 3122 | val = XCDR (val); |
70c22245 KH |
3123 | } |
3124 | ||
4ed46869 KH |
3125 | /* Checks FLAGS[REG] (REG = 0, 1, 2 3) and decide designations. |
3126 | FLAGS[REG] can be one of below: | |
3127 | integer CHARSET: CHARSET occupies register I, | |
3128 | t: designate nothing to REG initially, but can be used | |
3129 | by any charsets, | |
3130 | list of integer, nil, or t: designate the first | |
3131 | element (if integer) to REG initially, the remaining | |
3132 | elements (if integer) is designated to REG on request, | |
d46c5b12 | 3133 | if an element is t, REG can be used by any charsets, |
4ed46869 | 3134 | nil: REG is never used. */ |
467e7675 | 3135 | for (charset = 0; charset <= MAX_CHARSET; charset++) |
1ba9e4ab KH |
3136 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3137 | = CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION; | |
4ed46869 KH |
3138 | for (i = 0; i < 4; i++) |
3139 | { | |
3140 | if (INTEGERP (flags[i]) | |
e0e989f6 KH |
3141 | && (charset = XINT (flags[i]), CHARSET_VALID_P (charset)) |
3142 | || (charset = get_charset_id (flags[i])) >= 0) | |
4ed46869 KH |
3143 | { |
3144 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = charset; | |
3145 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) = i; | |
3146 | } | |
3147 | else if (EQ (flags[i], Qt)) | |
3148 | { | |
3149 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
d46c5b12 KH |
3150 | reg_bits |= 1 << i; |
3151 | coding->flags |= CODING_FLAG_ISO_DESIGNATION; | |
4ed46869 KH |
3152 | } |
3153 | else if (CONSP (flags[i])) | |
3154 | { | |
84d60297 RS |
3155 | Lisp_Object tail; |
3156 | tail = flags[i]; | |
4ed46869 | 3157 | |
d46c5b12 | 3158 | coding->flags |= CODING_FLAG_ISO_DESIGNATION; |
03699b14 KR |
3159 | if (INTEGERP (XCAR (tail)) |
3160 | && (charset = XINT (XCAR (tail)), | |
e0e989f6 | 3161 | CHARSET_VALID_P (charset)) |
03699b14 | 3162 | || (charset = get_charset_id (XCAR (tail))) >= 0) |
4ed46869 KH |
3163 | { |
3164 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = charset; | |
3165 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) =i; | |
3166 | } | |
3167 | else | |
3168 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
03699b14 | 3169 | tail = XCDR (tail); |
4ed46869 KH |
3170 | while (CONSP (tail)) |
3171 | { | |
03699b14 KR |
3172 | if (INTEGERP (XCAR (tail)) |
3173 | && (charset = XINT (XCAR (tail)), | |
e0e989f6 | 3174 | CHARSET_VALID_P (charset)) |
03699b14 | 3175 | || (charset = get_charset_id (XCAR (tail))) >= 0) |
70c22245 KH |
3176 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3177 | = i; | |
03699b14 | 3178 | else if (EQ (XCAR (tail), Qt)) |
d46c5b12 | 3179 | reg_bits |= 1 << i; |
03699b14 | 3180 | tail = XCDR (tail); |
4ed46869 KH |
3181 | } |
3182 | } | |
3183 | else | |
3184 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
3185 | ||
3186 | CODING_SPEC_ISO_DESIGNATION (coding, i) | |
3187 | = CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i); | |
3188 | } | |
3189 | ||
d46c5b12 | 3190 | if (reg_bits && ! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)) |
4ed46869 KH |
3191 | { |
3192 | /* REG 1 can be used only by locking shift in 7-bit env. */ | |
3193 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) | |
d46c5b12 | 3194 | reg_bits &= ~2; |
4ed46869 KH |
3195 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
3196 | /* Without any shifting, only REG 0 and 1 can be used. */ | |
d46c5b12 | 3197 | reg_bits &= 3; |
4ed46869 KH |
3198 | } |
3199 | ||
d46c5b12 KH |
3200 | if (reg_bits) |
3201 | for (charset = 0; charset <= MAX_CHARSET; charset++) | |
6e85d753 | 3202 | { |
96148065 KH |
3203 | if (CHARSET_VALID_P (charset) |
3204 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) | |
3205 | == CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION)) | |
d46c5b12 KH |
3206 | { |
3207 | /* There exist some default graphic registers to be | |
96148065 | 3208 | used by CHARSET. */ |
d46c5b12 KH |
3209 | |
3210 | /* We had better avoid designating a charset of | |
3211 | CHARS96 to REG 0 as far as possible. */ | |
3212 | if (CHARSET_CHARS (charset) == 96) | |
3213 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) | |
3214 | = (reg_bits & 2 | |
3215 | ? 1 : (reg_bits & 4 ? 2 : (reg_bits & 8 ? 3 : 0))); | |
3216 | else | |
3217 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) | |
3218 | = (reg_bits & 1 | |
3219 | ? 0 : (reg_bits & 2 ? 1 : (reg_bits & 4 ? 2 : 3))); | |
3220 | } | |
6e85d753 | 3221 | } |
4ed46869 | 3222 | } |
c952af22 | 3223 | coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK; |
d46c5b12 | 3224 | coding->spec.iso2022.last_invalid_designation_register = -1; |
4ed46869 KH |
3225 | break; |
3226 | ||
3227 | case 3: | |
3228 | coding->type = coding_type_big5; | |
c952af22 KH |
3229 | coding->common_flags |
3230 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3231 | coding->flags |
4608c386 | 3232 | = (NILP (XVECTOR (coding_spec)->contents[4]) |
4ed46869 KH |
3233 | ? CODING_FLAG_BIG5_HKU |
3234 | : CODING_FLAG_BIG5_ETEN); | |
3235 | break; | |
3236 | ||
3237 | case 4: | |
3238 | coding->type = coding_type_ccl; | |
c952af22 KH |
3239 | coding->common_flags |
3240 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3241 | { |
84d60297 | 3242 | val = XVECTOR (coding_spec)->contents[4]; |
ef4ced28 KH |
3243 | if (! CONSP (val) |
3244 | || setup_ccl_program (&(coding->spec.ccl.decoder), | |
03699b14 | 3245 | XCAR (val)) < 0 |
ef4ced28 | 3246 | || setup_ccl_program (&(coding->spec.ccl.encoder), |
03699b14 | 3247 | XCDR (val)) < 0) |
4ed46869 | 3248 | goto label_invalid_coding_system; |
1397dc18 KH |
3249 | |
3250 | bzero (coding->spec.ccl.valid_codes, 256); | |
3251 | val = Fplist_get (plist, Qvalid_codes); | |
3252 | if (CONSP (val)) | |
3253 | { | |
3254 | Lisp_Object this; | |
3255 | ||
03699b14 | 3256 | for (; CONSP (val); val = XCDR (val)) |
1397dc18 | 3257 | { |
03699b14 | 3258 | this = XCAR (val); |
1397dc18 KH |
3259 | if (INTEGERP (this) |
3260 | && XINT (this) >= 0 && XINT (this) < 256) | |
3261 | coding->spec.ccl.valid_codes[XINT (this)] = 1; | |
3262 | else if (CONSP (this) | |
03699b14 KR |
3263 | && INTEGERP (XCAR (this)) |
3264 | && INTEGERP (XCDR (this))) | |
1397dc18 | 3265 | { |
03699b14 KR |
3266 | int start = XINT (XCAR (this)); |
3267 | int end = XINT (XCDR (this)); | |
1397dc18 KH |
3268 | |
3269 | if (start >= 0 && start <= end && end < 256) | |
e133c8fa | 3270 | while (start <= end) |
1397dc18 KH |
3271 | coding->spec.ccl.valid_codes[start++] = 1; |
3272 | } | |
3273 | } | |
3274 | } | |
4ed46869 | 3275 | } |
c952af22 | 3276 | coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK; |
aaaf0b1e | 3277 | coding->spec.ccl.cr_carryover = 0; |
4ed46869 KH |
3278 | break; |
3279 | ||
27901516 KH |
3280 | case 5: |
3281 | coding->type = coding_type_raw_text; | |
3282 | break; | |
3283 | ||
4ed46869 | 3284 | default: |
d46c5b12 | 3285 | goto label_invalid_coding_system; |
4ed46869 KH |
3286 | } |
3287 | return 0; | |
3288 | ||
3289 | label_invalid_coding_system: | |
3290 | coding->type = coding_type_no_conversion; | |
d46c5b12 | 3291 | coding->category_idx = CODING_CATEGORY_IDX_BINARY; |
c952af22 | 3292 | coding->common_flags = 0; |
dec137e5 | 3293 | coding->eol_type = CODING_EOL_LF; |
d46c5b12 | 3294 | coding->pre_write_conversion = coding->post_read_conversion = Qnil; |
4ed46869 KH |
3295 | return -1; |
3296 | } | |
3297 | ||
ec6d2bb8 KH |
3298 | /* Free memory blocks allocated for storing composition information. */ |
3299 | ||
3300 | void | |
3301 | coding_free_composition_data (coding) | |
3302 | struct coding_system *coding; | |
3303 | { | |
3304 | struct composition_data *cmp_data = coding->cmp_data, *next; | |
3305 | ||
3306 | if (!cmp_data) | |
3307 | return; | |
3308 | /* Memory blocks are chained. At first, rewind to the first, then, | |
3309 | free blocks one by one. */ | |
3310 | while (cmp_data->prev) | |
3311 | cmp_data = cmp_data->prev; | |
3312 | while (cmp_data) | |
3313 | { | |
3314 | next = cmp_data->next; | |
3315 | xfree (cmp_data); | |
3316 | cmp_data = next; | |
3317 | } | |
3318 | coding->cmp_data = NULL; | |
3319 | } | |
3320 | ||
3321 | /* Set `char_offset' member of all memory blocks pointed by | |
3322 | coding->cmp_data to POS. */ | |
3323 | ||
3324 | void | |
3325 | coding_adjust_composition_offset (coding, pos) | |
3326 | struct coding_system *coding; | |
3327 | int pos; | |
3328 | { | |
3329 | struct composition_data *cmp_data; | |
3330 | ||
3331 | for (cmp_data = coding->cmp_data; cmp_data; cmp_data = cmp_data->next) | |
3332 | cmp_data->char_offset = pos; | |
3333 | } | |
3334 | ||
54f78171 KH |
3335 | /* Setup raw-text or one of its subsidiaries in the structure |
3336 | coding_system CODING according to the already setup value eol_type | |
3337 | in CODING. CODING should be setup for some coding system in | |
3338 | advance. */ | |
3339 | ||
3340 | void | |
3341 | setup_raw_text_coding_system (coding) | |
3342 | struct coding_system *coding; | |
3343 | { | |
3344 | if (coding->type != coding_type_raw_text) | |
3345 | { | |
3346 | coding->symbol = Qraw_text; | |
3347 | coding->type = coding_type_raw_text; | |
3348 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
3349 | { | |
84d60297 RS |
3350 | Lisp_Object subsidiaries; |
3351 | subsidiaries = Fget (Qraw_text, Qeol_type); | |
54f78171 KH |
3352 | |
3353 | if (VECTORP (subsidiaries) | |
3354 | && XVECTOR (subsidiaries)->size == 3) | |
3355 | coding->symbol | |
3356 | = XVECTOR (subsidiaries)->contents[coding->eol_type]; | |
3357 | } | |
716e0b0a | 3358 | setup_coding_system (coding->symbol, coding); |
54f78171 KH |
3359 | } |
3360 | return; | |
3361 | } | |
3362 | ||
4ed46869 KH |
3363 | /* Emacs has a mechanism to automatically detect a coding system if it |
3364 | is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But, | |
3365 | it's impossible to distinguish some coding systems accurately | |
3366 | because they use the same range of codes. So, at first, coding | |
3367 | systems are categorized into 7, those are: | |
3368 | ||
0ef69138 | 3369 | o coding-category-emacs-mule |
4ed46869 KH |
3370 | |
3371 | The category for a coding system which has the same code range | |
3372 | as Emacs' internal format. Assigned the coding-system (Lisp | |
0ef69138 | 3373 | symbol) `emacs-mule' by default. |
4ed46869 KH |
3374 | |
3375 | o coding-category-sjis | |
3376 | ||
3377 | The category for a coding system which has the same code range | |
3378 | as SJIS. Assigned the coding-system (Lisp | |
7717c392 | 3379 | symbol) `japanese-shift-jis' by default. |
4ed46869 KH |
3380 | |
3381 | o coding-category-iso-7 | |
3382 | ||
3383 | The category for a coding system which has the same code range | |
7717c392 | 3384 | as ISO2022 of 7-bit environment. This doesn't use any locking |
d46c5b12 KH |
3385 | shift and single shift functions. This can encode/decode all |
3386 | charsets. Assigned the coding-system (Lisp symbol) | |
3387 | `iso-2022-7bit' by default. | |
3388 | ||
3389 | o coding-category-iso-7-tight | |
3390 | ||
3391 | Same as coding-category-iso-7 except that this can | |
3392 | encode/decode only the specified charsets. | |
4ed46869 KH |
3393 | |
3394 | o coding-category-iso-8-1 | |
3395 | ||
3396 | The category for a coding system which has the same code range | |
3397 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
3398 | for DIMENSION1 charset. This doesn't use any locking shift |
3399 | and single shift functions. Assigned the coding-system (Lisp | |
3400 | symbol) `iso-latin-1' by default. | |
4ed46869 KH |
3401 | |
3402 | o coding-category-iso-8-2 | |
3403 | ||
3404 | The category for a coding system which has the same code range | |
3405 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
3406 | for DIMENSION2 charset. This doesn't use any locking shift |
3407 | and single shift functions. Assigned the coding-system (Lisp | |
3408 | symbol) `japanese-iso-8bit' by default. | |
4ed46869 | 3409 | |
7717c392 | 3410 | o coding-category-iso-7-else |
4ed46869 KH |
3411 | |
3412 | The category for a coding system which has the same code range | |
7717c392 KH |
3413 | as ISO2022 of 7-bit environemnt but uses locking shift or |
3414 | single shift functions. Assigned the coding-system (Lisp | |
3415 | symbol) `iso-2022-7bit-lock' by default. | |
3416 | ||
3417 | o coding-category-iso-8-else | |
3418 | ||
3419 | The category for a coding system which has the same code range | |
3420 | as ISO2022 of 8-bit environemnt but uses locking shift or | |
3421 | single shift functions. Assigned the coding-system (Lisp | |
3422 | symbol) `iso-2022-8bit-ss2' by default. | |
4ed46869 KH |
3423 | |
3424 | o coding-category-big5 | |
3425 | ||
3426 | The category for a coding system which has the same code range | |
3427 | as BIG5. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 3428 | `cn-big5' by default. |
4ed46869 | 3429 | |
fa42c37f KH |
3430 | o coding-category-utf-8 |
3431 | ||
3432 | The category for a coding system which has the same code range | |
3433 | as UTF-8 (cf. RFC2279). Assigned the coding-system (Lisp | |
3434 | symbol) `utf-8' by default. | |
3435 | ||
3436 | o coding-category-utf-16-be | |
3437 | ||
3438 | The category for a coding system in which a text has an | |
3439 | Unicode signature (cf. Unicode Standard) in the order of BIG | |
3440 | endian at the head. Assigned the coding-system (Lisp symbol) | |
3441 | `utf-16-be' by default. | |
3442 | ||
3443 | o coding-category-utf-16-le | |
3444 | ||
3445 | The category for a coding system in which a text has an | |
3446 | Unicode signature (cf. Unicode Standard) in the order of | |
3447 | LITTLE endian at the head. Assigned the coding-system (Lisp | |
3448 | symbol) `utf-16-le' by default. | |
3449 | ||
1397dc18 KH |
3450 | o coding-category-ccl |
3451 | ||
3452 | The category for a coding system of which encoder/decoder is | |
3453 | written in CCL programs. The default value is nil, i.e., no | |
3454 | coding system is assigned. | |
3455 | ||
4ed46869 KH |
3456 | o coding-category-binary |
3457 | ||
3458 | The category for a coding system not categorized in any of the | |
3459 | above. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 3460 | `no-conversion' by default. |
4ed46869 KH |
3461 | |
3462 | Each of them is a Lisp symbol and the value is an actual | |
3463 | `coding-system's (this is also a Lisp symbol) assigned by a user. | |
3464 | What Emacs does actually is to detect a category of coding system. | |
3465 | Then, it uses a `coding-system' assigned to it. If Emacs can't | |
3466 | decide only one possible category, it selects a category of the | |
3467 | highest priority. Priorities of categories are also specified by a | |
3468 | user in a Lisp variable `coding-category-list'. | |
3469 | ||
3470 | */ | |
3471 | ||
66cfb530 KH |
3472 | static |
3473 | int ascii_skip_code[256]; | |
3474 | ||
d46c5b12 | 3475 | /* Detect how a text of length SRC_BYTES pointed by SOURCE is encoded. |
4ed46869 KH |
3476 | If it detects possible coding systems, return an integer in which |
3477 | appropriate flag bits are set. Flag bits are defined by macros | |
fa42c37f KH |
3478 | CODING_CATEGORY_MASK_XXX in `coding.h'. If PRIORITIES is non-NULL, |
3479 | it should point the table `coding_priorities'. In that case, only | |
3480 | the flag bit for a coding system of the highest priority is set in | |
3481 | the returned value. | |
4ed46869 | 3482 | |
d46c5b12 KH |
3483 | How many ASCII characters are at the head is returned as *SKIP. */ |
3484 | ||
3485 | static int | |
3486 | detect_coding_mask (source, src_bytes, priorities, skip) | |
3487 | unsigned char *source; | |
3488 | int src_bytes, *priorities, *skip; | |
4ed46869 KH |
3489 | { |
3490 | register unsigned char c; | |
d46c5b12 | 3491 | unsigned char *src = source, *src_end = source + src_bytes; |
fa42c37f KH |
3492 | unsigned int mask, utf16_examined_p, iso2022_examined_p; |
3493 | int i, idx; | |
4ed46869 KH |
3494 | |
3495 | /* At first, skip all ASCII characters and control characters except | |
3496 | for three ISO2022 specific control characters. */ | |
66cfb530 KH |
3497 | ascii_skip_code[ISO_CODE_SO] = 0; |
3498 | ascii_skip_code[ISO_CODE_SI] = 0; | |
3499 | ascii_skip_code[ISO_CODE_ESC] = 0; | |
3500 | ||
bcf26d6a | 3501 | label_loop_detect_coding: |
66cfb530 | 3502 | while (src < src_end && ascii_skip_code[*src]) src++; |
d46c5b12 | 3503 | *skip = src - source; |
4ed46869 KH |
3504 | |
3505 | if (src >= src_end) | |
3506 | /* We found nothing other than ASCII. There's nothing to do. */ | |
d46c5b12 | 3507 | return 0; |
4ed46869 | 3508 | |
8a8147d6 | 3509 | c = *src; |
4ed46869 KH |
3510 | /* The text seems to be encoded in some multilingual coding system. |
3511 | Now, try to find in which coding system the text is encoded. */ | |
3512 | if (c < 0x80) | |
bcf26d6a KH |
3513 | { |
3514 | /* i.e. (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) */ | |
3515 | /* C is an ISO2022 specific control code of C0. */ | |
3516 | mask = detect_coding_iso2022 (src, src_end); | |
1b2af4b0 | 3517 | if (mask == 0) |
d46c5b12 KH |
3518 | { |
3519 | /* No valid ISO2022 code follows C. Try again. */ | |
3520 | src++; | |
66cfb530 KH |
3521 | if (c == ISO_CODE_ESC) |
3522 | ascii_skip_code[ISO_CODE_ESC] = 1; | |
3523 | else | |
3524 | ascii_skip_code[ISO_CODE_SO] = ascii_skip_code[ISO_CODE_SI] = 1; | |
d46c5b12 KH |
3525 | goto label_loop_detect_coding; |
3526 | } | |
3527 | if (priorities) | |
fa42c37f KH |
3528 | { |
3529 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
3530 | { | |
3531 | if (mask & priorities[i]) | |
3532 | return priorities[i]; | |
3533 | } | |
3534 | return CODING_CATEGORY_MASK_RAW_TEXT; | |
3535 | } | |
bcf26d6a | 3536 | } |
d46c5b12 | 3537 | else |
c4825358 | 3538 | { |
d46c5b12 | 3539 | int try; |
4ed46869 | 3540 | |
d46c5b12 KH |
3541 | if (c < 0xA0) |
3542 | { | |
3543 | /* C is the first byte of SJIS character code, | |
fa42c37f KH |
3544 | or a leading-code of Emacs' internal format (emacs-mule), |
3545 | or the first byte of UTF-16. */ | |
3546 | try = (CODING_CATEGORY_MASK_SJIS | |
3547 | | CODING_CATEGORY_MASK_EMACS_MULE | |
3548 | | CODING_CATEGORY_MASK_UTF_16_BE | |
3549 | | CODING_CATEGORY_MASK_UTF_16_LE); | |
d46c5b12 KH |
3550 | |
3551 | /* Or, if C is a special latin extra code, | |
3552 | or is an ISO2022 specific control code of C1 (SS2 or SS3), | |
3553 | or is an ISO2022 control-sequence-introducer (CSI), | |
3554 | we should also consider the possibility of ISO2022 codings. */ | |
3555 | if ((VECTORP (Vlatin_extra_code_table) | |
3556 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
3557 | || (c == ISO_CODE_SS2 || c == ISO_CODE_SS3) | |
3558 | || (c == ISO_CODE_CSI | |
3559 | && (src < src_end | |
3560 | && (*src == ']' | |
3561 | || ((*src == '0' || *src == '1' || *src == '2') | |
3562 | && src + 1 < src_end | |
3563 | && src[1] == ']'))))) | |
3564 | try |= (CODING_CATEGORY_MASK_ISO_8_ELSE | |
3565 | | CODING_CATEGORY_MASK_ISO_8BIT); | |
3566 | } | |
c4825358 | 3567 | else |
d46c5b12 KH |
3568 | /* C is a character of ISO2022 in graphic plane right, |
3569 | or a SJIS's 1-byte character code (i.e. JISX0201), | |
fa42c37f KH |
3570 | or the first byte of BIG5's 2-byte code, |
3571 | or the first byte of UTF-8/16. */ | |
d46c5b12 KH |
3572 | try = (CODING_CATEGORY_MASK_ISO_8_ELSE |
3573 | | CODING_CATEGORY_MASK_ISO_8BIT | |
3574 | | CODING_CATEGORY_MASK_SJIS | |
fa42c37f KH |
3575 | | CODING_CATEGORY_MASK_BIG5 |
3576 | | CODING_CATEGORY_MASK_UTF_8 | |
3577 | | CODING_CATEGORY_MASK_UTF_16_BE | |
3578 | | CODING_CATEGORY_MASK_UTF_16_LE); | |
d46c5b12 | 3579 | |
1397dc18 KH |
3580 | /* Or, we may have to consider the possibility of CCL. */ |
3581 | if (coding_system_table[CODING_CATEGORY_IDX_CCL] | |
3582 | && (coding_system_table[CODING_CATEGORY_IDX_CCL] | |
3583 | ->spec.ccl.valid_codes)[c]) | |
3584 | try |= CODING_CATEGORY_MASK_CCL; | |
3585 | ||
d46c5b12 | 3586 | mask = 0; |
fa42c37f | 3587 | utf16_examined_p = iso2022_examined_p = 0; |
d46c5b12 KH |
3588 | if (priorities) |
3589 | { | |
3590 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
3591 | { | |
fa42c37f KH |
3592 | if (!iso2022_examined_p |
3593 | && (priorities[i] & try & CODING_CATEGORY_MASK_ISO)) | |
3594 | { | |
3595 | mask |= detect_coding_iso2022 (src, src_end); | |
3596 | iso2022_examined_p = 1; | |
3597 | } | |
5ab13dd0 | 3598 | else if (priorities[i] & try & CODING_CATEGORY_MASK_SJIS) |
fa42c37f KH |
3599 | mask |= detect_coding_sjis (src, src_end); |
3600 | else if (priorities[i] & try & CODING_CATEGORY_MASK_UTF_8) | |
3601 | mask |= detect_coding_utf_8 (src, src_end); | |
3602 | else if (!utf16_examined_p | |
3603 | && (priorities[i] & try & | |
3604 | CODING_CATEGORY_MASK_UTF_16_BE_LE)) | |
3605 | { | |
3606 | mask |= detect_coding_utf_16 (src, src_end); | |
3607 | utf16_examined_p = 1; | |
3608 | } | |
5ab13dd0 | 3609 | else if (priorities[i] & try & CODING_CATEGORY_MASK_BIG5) |
fa42c37f | 3610 | mask |= detect_coding_big5 (src, src_end); |
5ab13dd0 | 3611 | else if (priorities[i] & try & CODING_CATEGORY_MASK_EMACS_MULE) |
fa42c37f | 3612 | mask |= detect_coding_emacs_mule (src, src_end); |
89fa8b36 | 3613 | else if (priorities[i] & try & CODING_CATEGORY_MASK_CCL) |
fa42c37f | 3614 | mask |= detect_coding_ccl (src, src_end); |
5ab13dd0 | 3615 | else if (priorities[i] & CODING_CATEGORY_MASK_RAW_TEXT) |
fa42c37f | 3616 | mask |= CODING_CATEGORY_MASK_RAW_TEXT; |
5ab13dd0 | 3617 | else if (priorities[i] & CODING_CATEGORY_MASK_BINARY) |
fa42c37f KH |
3618 | mask |= CODING_CATEGORY_MASK_BINARY; |
3619 | if (mask & priorities[i]) | |
3620 | return priorities[i]; | |
d46c5b12 KH |
3621 | } |
3622 | return CODING_CATEGORY_MASK_RAW_TEXT; | |
3623 | } | |
3624 | if (try & CODING_CATEGORY_MASK_ISO) | |
3625 | mask |= detect_coding_iso2022 (src, src_end); | |
3626 | if (try & CODING_CATEGORY_MASK_SJIS) | |
3627 | mask |= detect_coding_sjis (src, src_end); | |
3628 | if (try & CODING_CATEGORY_MASK_BIG5) | |
3629 | mask |= detect_coding_big5 (src, src_end); | |
fa42c37f KH |
3630 | if (try & CODING_CATEGORY_MASK_UTF_8) |
3631 | mask |= detect_coding_utf_8 (src, src_end); | |
3632 | if (try & CODING_CATEGORY_MASK_UTF_16_BE_LE) | |
3633 | mask |= detect_coding_utf_16 (src, src_end); | |
d46c5b12 | 3634 | if (try & CODING_CATEGORY_MASK_EMACS_MULE) |
1397dc18 KH |
3635 | mask |= detect_coding_emacs_mule (src, src_end); |
3636 | if (try & CODING_CATEGORY_MASK_CCL) | |
3637 | mask |= detect_coding_ccl (src, src_end); | |
c4825358 | 3638 | } |
5ab13dd0 | 3639 | return (mask | CODING_CATEGORY_MASK_RAW_TEXT | CODING_CATEGORY_MASK_BINARY); |
4ed46869 KH |
3640 | } |
3641 | ||
3642 | /* Detect how a text of length SRC_BYTES pointed by SRC is encoded. | |
3643 | The information of the detected coding system is set in CODING. */ | |
3644 | ||
3645 | void | |
3646 | detect_coding (coding, src, src_bytes) | |
3647 | struct coding_system *coding; | |
3648 | unsigned char *src; | |
3649 | int src_bytes; | |
3650 | { | |
d46c5b12 KH |
3651 | unsigned int idx; |
3652 | int skip, mask, i; | |
84d60297 | 3653 | Lisp_Object val; |
4ed46869 | 3654 | |
84d60297 | 3655 | val = Vcoding_category_list; |
66cfb530 | 3656 | mask = detect_coding_mask (src, src_bytes, coding_priorities, &skip); |
d46c5b12 | 3657 | coding->heading_ascii = skip; |
4ed46869 | 3658 | |
d46c5b12 KH |
3659 | if (!mask) return; |
3660 | ||
3661 | /* We found a single coding system of the highest priority in MASK. */ | |
3662 | idx = 0; | |
3663 | while (mask && ! (mask & 1)) mask >>= 1, idx++; | |
3664 | if (! mask) | |
3665 | idx = CODING_CATEGORY_IDX_RAW_TEXT; | |
4ed46869 | 3666 | |
d46c5b12 KH |
3667 | val = XSYMBOL (XVECTOR (Vcoding_category_table)->contents[idx])->value; |
3668 | ||
3669 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
27901516 | 3670 | { |
84d60297 | 3671 | Lisp_Object tmp; |
d46c5b12 | 3672 | |
84d60297 | 3673 | tmp = Fget (val, Qeol_type); |
d46c5b12 KH |
3674 | if (VECTORP (tmp)) |
3675 | val = XVECTOR (tmp)->contents[coding->eol_type]; | |
4ed46869 | 3676 | } |
b73bfc1c KH |
3677 | |
3678 | /* Setup this new coding system while preserving some slots. */ | |
3679 | { | |
3680 | int src_multibyte = coding->src_multibyte; | |
3681 | int dst_multibyte = coding->dst_multibyte; | |
3682 | ||
3683 | setup_coding_system (val, coding); | |
3684 | coding->src_multibyte = src_multibyte; | |
3685 | coding->dst_multibyte = dst_multibyte; | |
3686 | coding->heading_ascii = skip; | |
3687 | } | |
4ed46869 KH |
3688 | } |
3689 | ||
d46c5b12 KH |
3690 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by |
3691 | SOURCE is encoded. Return one of CODING_EOL_LF, CODING_EOL_CRLF, | |
3692 | CODING_EOL_CR, and CODING_EOL_UNDECIDED. | |
3693 | ||
3694 | How many non-eol characters are at the head is returned as *SKIP. */ | |
4ed46869 | 3695 | |
bc4bc72a RS |
3696 | #define MAX_EOL_CHECK_COUNT 3 |
3697 | ||
d46c5b12 KH |
3698 | static int |
3699 | detect_eol_type (source, src_bytes, skip) | |
3700 | unsigned char *source; | |
3701 | int src_bytes, *skip; | |
4ed46869 | 3702 | { |
d46c5b12 | 3703 | unsigned char *src = source, *src_end = src + src_bytes; |
4ed46869 | 3704 | unsigned char c; |
bc4bc72a RS |
3705 | int total = 0; /* How many end-of-lines are found so far. */ |
3706 | int eol_type = CODING_EOL_UNDECIDED; | |
3707 | int this_eol_type; | |
4ed46869 | 3708 | |
d46c5b12 KH |
3709 | *skip = 0; |
3710 | ||
bc4bc72a | 3711 | while (src < src_end && total < MAX_EOL_CHECK_COUNT) |
4ed46869 KH |
3712 | { |
3713 | c = *src++; | |
bc4bc72a | 3714 | if (c == '\n' || c == '\r') |
4ed46869 | 3715 | { |
d46c5b12 KH |
3716 | if (*skip == 0) |
3717 | *skip = src - 1 - source; | |
bc4bc72a RS |
3718 | total++; |
3719 | if (c == '\n') | |
3720 | this_eol_type = CODING_EOL_LF; | |
3721 | else if (src >= src_end || *src != '\n') | |
3722 | this_eol_type = CODING_EOL_CR; | |
4ed46869 | 3723 | else |
bc4bc72a RS |
3724 | this_eol_type = CODING_EOL_CRLF, src++; |
3725 | ||
3726 | if (eol_type == CODING_EOL_UNDECIDED) | |
3727 | /* This is the first end-of-line. */ | |
3728 | eol_type = this_eol_type; | |
3729 | else if (eol_type != this_eol_type) | |
d46c5b12 KH |
3730 | { |
3731 | /* The found type is different from what found before. */ | |
3732 | eol_type = CODING_EOL_INCONSISTENT; | |
3733 | break; | |
3734 | } | |
4ed46869 KH |
3735 | } |
3736 | } | |
bc4bc72a | 3737 | |
d46c5b12 KH |
3738 | if (*skip == 0) |
3739 | *skip = src_end - source; | |
85a02ca4 | 3740 | return eol_type; |
4ed46869 KH |
3741 | } |
3742 | ||
fa42c37f KH |
3743 | /* Like detect_eol_type, but detect EOL type in 2-octet |
3744 | big-endian/little-endian format for coding systems utf-16-be and | |
3745 | utf-16-le. */ | |
3746 | ||
3747 | static int | |
3748 | detect_eol_type_in_2_octet_form (source, src_bytes, skip, big_endian_p) | |
3749 | unsigned char *source; | |
3750 | int src_bytes, *skip; | |
3751 | { | |
3752 | unsigned char *src = source, *src_end = src + src_bytes; | |
3753 | unsigned int c1, c2; | |
3754 | int total = 0; /* How many end-of-lines are found so far. */ | |
3755 | int eol_type = CODING_EOL_UNDECIDED; | |
3756 | int this_eol_type; | |
3757 | int msb, lsb; | |
3758 | ||
3759 | if (big_endian_p) | |
3760 | msb = 0, lsb = 1; | |
3761 | else | |
3762 | msb = 1, lsb = 0; | |
3763 | ||
3764 | *skip = 0; | |
3765 | ||
3766 | while ((src + 1) < src_end && total < MAX_EOL_CHECK_COUNT) | |
3767 | { | |
3768 | c1 = (src[msb] << 8) | (src[lsb]); | |
3769 | src += 2; | |
3770 | ||
3771 | if (c1 == '\n' || c1 == '\r') | |
3772 | { | |
3773 | if (*skip == 0) | |
3774 | *skip = src - 2 - source; | |
3775 | total++; | |
3776 | if (c1 == '\n') | |
3777 | { | |
3778 | this_eol_type = CODING_EOL_LF; | |
3779 | } | |
3780 | else | |
3781 | { | |
3782 | if ((src + 1) >= src_end) | |
3783 | { | |
3784 | this_eol_type = CODING_EOL_CR; | |
3785 | } | |
3786 | else | |
3787 | { | |
3788 | c2 = (src[msb] << 8) | (src[lsb]); | |
3789 | if (c2 == '\n') | |
3790 | this_eol_type = CODING_EOL_CRLF, src += 2; | |
3791 | else | |
3792 | this_eol_type = CODING_EOL_CR; | |
3793 | } | |
3794 | } | |
3795 | ||
3796 | if (eol_type == CODING_EOL_UNDECIDED) | |
3797 | /* This is the first end-of-line. */ | |
3798 | eol_type = this_eol_type; | |
3799 | else if (eol_type != this_eol_type) | |
3800 | { | |
3801 | /* The found type is different from what found before. */ | |
3802 | eol_type = CODING_EOL_INCONSISTENT; | |
3803 | break; | |
3804 | } | |
3805 | } | |
3806 | } | |
3807 | ||
3808 | if (*skip == 0) | |
3809 | *skip = src_end - source; | |
3810 | return eol_type; | |
3811 | } | |
3812 | ||
4ed46869 KH |
3813 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by SRC |
3814 | is encoded. If it detects an appropriate format of end-of-line, it | |
3815 | sets the information in *CODING. */ | |
3816 | ||
3817 | void | |
3818 | detect_eol (coding, src, src_bytes) | |
3819 | struct coding_system *coding; | |
3820 | unsigned char *src; | |
3821 | int src_bytes; | |
3822 | { | |
4608c386 | 3823 | Lisp_Object val; |
d46c5b12 | 3824 | int skip; |
fa42c37f KH |
3825 | int eol_type; |
3826 | ||
3827 | switch (coding->category_idx) | |
3828 | { | |
3829 | case CODING_CATEGORY_IDX_UTF_16_BE: | |
3830 | eol_type = detect_eol_type_in_2_octet_form (src, src_bytes, &skip, 1); | |
3831 | break; | |
3832 | case CODING_CATEGORY_IDX_UTF_16_LE: | |
3833 | eol_type = detect_eol_type_in_2_octet_form (src, src_bytes, &skip, 0); | |
3834 | break; | |
3835 | default: | |
3836 | eol_type = detect_eol_type (src, src_bytes, &skip); | |
3837 | break; | |
3838 | } | |
d46c5b12 KH |
3839 | |
3840 | if (coding->heading_ascii > skip) | |
3841 | coding->heading_ascii = skip; | |
3842 | else | |
3843 | skip = coding->heading_ascii; | |
4ed46869 | 3844 | |
0ef69138 | 3845 | if (eol_type == CODING_EOL_UNDECIDED) |
4ed46869 | 3846 | return; |
27901516 KH |
3847 | if (eol_type == CODING_EOL_INCONSISTENT) |
3848 | { | |
3849 | #if 0 | |
3850 | /* This code is suppressed until we find a better way to | |
992f23f2 | 3851 | distinguish raw text file and binary file. */ |
27901516 KH |
3852 | |
3853 | /* If we have already detected that the coding is raw-text, the | |
3854 | coding should actually be no-conversion. */ | |
3855 | if (coding->type == coding_type_raw_text) | |
3856 | { | |
3857 | setup_coding_system (Qno_conversion, coding); | |
3858 | return; | |
3859 | } | |
3860 | /* Else, let's decode only text code anyway. */ | |
3861 | #endif /* 0 */ | |
1b2af4b0 | 3862 | eol_type = CODING_EOL_LF; |
27901516 KH |
3863 | } |
3864 | ||
4608c386 | 3865 | val = Fget (coding->symbol, Qeol_type); |
4ed46869 | 3866 | if (VECTORP (val) && XVECTOR (val)->size == 3) |
d46c5b12 | 3867 | { |
b73bfc1c KH |
3868 | int src_multibyte = coding->src_multibyte; |
3869 | int dst_multibyte = coding->dst_multibyte; | |
3870 | ||
d46c5b12 | 3871 | setup_coding_system (XVECTOR (val)->contents[eol_type], coding); |
b73bfc1c KH |
3872 | coding->src_multibyte = src_multibyte; |
3873 | coding->dst_multibyte = dst_multibyte; | |
d46c5b12 KH |
3874 | coding->heading_ascii = skip; |
3875 | } | |
3876 | } | |
3877 | ||
3878 | #define CONVERSION_BUFFER_EXTRA_ROOM 256 | |
3879 | ||
b73bfc1c KH |
3880 | #define DECODING_BUFFER_MAG(coding) \ |
3881 | (coding->type == coding_type_iso2022 \ | |
3882 | ? 3 \ | |
3883 | : (coding->type == coding_type_ccl \ | |
3884 | ? coding->spec.ccl.decoder.buf_magnification \ | |
3885 | : 2)) | |
d46c5b12 KH |
3886 | |
3887 | /* Return maximum size (bytes) of a buffer enough for decoding | |
3888 | SRC_BYTES of text encoded in CODING. */ | |
3889 | ||
3890 | int | |
3891 | decoding_buffer_size (coding, src_bytes) | |
3892 | struct coding_system *coding; | |
3893 | int src_bytes; | |
3894 | { | |
3895 | return (src_bytes * DECODING_BUFFER_MAG (coding) | |
3896 | + CONVERSION_BUFFER_EXTRA_ROOM); | |
3897 | } | |
3898 | ||
3899 | /* Return maximum size (bytes) of a buffer enough for encoding | |
3900 | SRC_BYTES of text to CODING. */ | |
3901 | ||
3902 | int | |
3903 | encoding_buffer_size (coding, src_bytes) | |
3904 | struct coding_system *coding; | |
3905 | int src_bytes; | |
3906 | { | |
3907 | int magnification; | |
3908 | ||
3909 | if (coding->type == coding_type_ccl) | |
3910 | magnification = coding->spec.ccl.encoder.buf_magnification; | |
b73bfc1c | 3911 | else if (CODING_REQUIRE_ENCODING (coding)) |
d46c5b12 | 3912 | magnification = 3; |
b73bfc1c KH |
3913 | else |
3914 | magnification = 1; | |
d46c5b12 KH |
3915 | |
3916 | return (src_bytes * magnification + CONVERSION_BUFFER_EXTRA_ROOM); | |
3917 | } | |
3918 | ||
73be902c KH |
3919 | /* Working buffer for code conversion. */ |
3920 | struct conversion_buffer | |
3921 | { | |
3922 | int size; /* size of data. */ | |
3923 | int on_stack; /* 1 if allocated by alloca. */ | |
3924 | unsigned char *data; | |
3925 | }; | |
d46c5b12 | 3926 | |
73be902c KH |
3927 | /* Don't use alloca for allocating memory space larger than this, lest |
3928 | we overflow their stack. */ | |
3929 | #define MAX_ALLOCA 16*1024 | |
d46c5b12 | 3930 | |
73be902c KH |
3931 | /* Allocate LEN bytes of memory for BUF (struct conversion_buffer). */ |
3932 | #define allocate_conversion_buffer(buf, len) \ | |
3933 | do { \ | |
3934 | if (len < MAX_ALLOCA) \ | |
3935 | { \ | |
3936 | buf.data = (unsigned char *) alloca (len); \ | |
3937 | buf.on_stack = 1; \ | |
3938 | } \ | |
3939 | else \ | |
3940 | { \ | |
3941 | buf.data = (unsigned char *) xmalloc (len); \ | |
3942 | buf.on_stack = 0; \ | |
3943 | } \ | |
3944 | buf.size = len; \ | |
3945 | } while (0) | |
d46c5b12 | 3946 | |
73be902c KH |
3947 | /* Double the allocated memory for *BUF. */ |
3948 | static void | |
3949 | extend_conversion_buffer (buf) | |
3950 | struct conversion_buffer *buf; | |
d46c5b12 | 3951 | { |
73be902c | 3952 | if (buf->on_stack) |
d46c5b12 | 3953 | { |
73be902c KH |
3954 | unsigned char *save = buf->data; |
3955 | buf->data = (unsigned char *) xmalloc (buf->size * 2); | |
3956 | bcopy (save, buf->data, buf->size); | |
3957 | buf->on_stack = 0; | |
d46c5b12 | 3958 | } |
73be902c KH |
3959 | else |
3960 | { | |
3961 | buf->data = (unsigned char *) xrealloc (buf->data, buf->size * 2); | |
3962 | } | |
3963 | buf->size *= 2; | |
3964 | } | |
3965 | ||
3966 | /* Free the allocated memory for BUF if it is not on stack. */ | |
3967 | static void | |
3968 | free_conversion_buffer (buf) | |
3969 | struct conversion_buffer *buf; | |
3970 | { | |
3971 | if (!buf->on_stack) | |
3972 | xfree (buf->data); | |
d46c5b12 KH |
3973 | } |
3974 | ||
3975 | int | |
3976 | ccl_coding_driver (coding, source, destination, src_bytes, dst_bytes, encodep) | |
3977 | struct coding_system *coding; | |
3978 | unsigned char *source, *destination; | |
3979 | int src_bytes, dst_bytes, encodep; | |
3980 | { | |
3981 | struct ccl_program *ccl | |
3982 | = encodep ? &coding->spec.ccl.encoder : &coding->spec.ccl.decoder; | |
3983 | int result; | |
3984 | ||
ae9ff118 | 3985 | ccl->last_block = coding->mode & CODING_MODE_LAST_BLOCK; |
aaaf0b1e KH |
3986 | if (encodep) |
3987 | ccl->eol_type = coding->eol_type; | |
7272d75c | 3988 | ccl->multibyte = coding->src_multibyte; |
d46c5b12 KH |
3989 | coding->produced = ccl_driver (ccl, source, destination, |
3990 | src_bytes, dst_bytes, &(coding->consumed)); | |
b73bfc1c KH |
3991 | if (encodep) |
3992 | coding->produced_char = coding->produced; | |
3993 | else | |
3994 | { | |
3995 | int bytes | |
3996 | = dst_bytes ? dst_bytes : source + coding->consumed - destination; | |
3997 | coding->produced = str_as_multibyte (destination, bytes, | |
3998 | coding->produced, | |
3999 | &(coding->produced_char)); | |
4000 | } | |
69f76525 | 4001 | |
d46c5b12 KH |
4002 | switch (ccl->status) |
4003 | { | |
4004 | case CCL_STAT_SUSPEND_BY_SRC: | |
73be902c | 4005 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; |
d46c5b12 KH |
4006 | break; |
4007 | case CCL_STAT_SUSPEND_BY_DST: | |
73be902c | 4008 | coding->result = CODING_FINISH_INSUFFICIENT_DST; |
d46c5b12 | 4009 | break; |
9864ebce KH |
4010 | case CCL_STAT_QUIT: |
4011 | case CCL_STAT_INVALID_CMD: | |
73be902c | 4012 | coding->result = CODING_FINISH_INTERRUPT; |
9864ebce | 4013 | break; |
d46c5b12 | 4014 | default: |
73be902c | 4015 | coding->result = CODING_FINISH_NORMAL; |
d46c5b12 KH |
4016 | break; |
4017 | } | |
73be902c | 4018 | return coding->result; |
4ed46869 KH |
4019 | } |
4020 | ||
aaaf0b1e KH |
4021 | /* Decode EOL format of the text at PTR of BYTES length destructively |
4022 | according to CODING->eol_type. This is called after the CCL | |
4023 | program produced a decoded text at PTR. If we do CRLF->LF | |
4024 | conversion, update CODING->produced and CODING->produced_char. */ | |
4025 | ||
4026 | static void | |
4027 | decode_eol_post_ccl (coding, ptr, bytes) | |
4028 | struct coding_system *coding; | |
4029 | unsigned char *ptr; | |
4030 | int bytes; | |
4031 | { | |
4032 | Lisp_Object val, saved_coding_symbol; | |
4033 | unsigned char *pend = ptr + bytes; | |
4034 | int dummy; | |
4035 | ||
4036 | /* Remember the current coding system symbol. We set it back when | |
4037 | an inconsistent EOL is found so that `last-coding-system-used' is | |
4038 | set to the coding system that doesn't specify EOL conversion. */ | |
4039 | saved_coding_symbol = coding->symbol; | |
4040 | ||
4041 | coding->spec.ccl.cr_carryover = 0; | |
4042 | if (coding->eol_type == CODING_EOL_UNDECIDED) | |
4043 | { | |
4044 | /* Here, to avoid the call of setup_coding_system, we directly | |
4045 | call detect_eol_type. */ | |
4046 | coding->eol_type = detect_eol_type (ptr, bytes, &dummy); | |
74b01b80 EZ |
4047 | if (coding->eol_type == CODING_EOL_INCONSISTENT) |
4048 | coding->eol_type = CODING_EOL_LF; | |
4049 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
4050 | { | |
4051 | val = Fget (coding->symbol, Qeol_type); | |
4052 | if (VECTORP (val) && XVECTOR (val)->size == 3) | |
4053 | coding->symbol = XVECTOR (val)->contents[coding->eol_type]; | |
4054 | } | |
aaaf0b1e KH |
4055 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
4056 | } | |
4057 | ||
74b01b80 EZ |
4058 | if (coding->eol_type == CODING_EOL_LF |
4059 | || coding->eol_type == CODING_EOL_UNDECIDED) | |
aaaf0b1e KH |
4060 | { |
4061 | /* We have nothing to do. */ | |
4062 | ptr = pend; | |
4063 | } | |
4064 | else if (coding->eol_type == CODING_EOL_CRLF) | |
4065 | { | |
4066 | unsigned char *pstart = ptr, *p = ptr; | |
4067 | ||
4068 | if (! (coding->mode & CODING_MODE_LAST_BLOCK) | |
4069 | && *(pend - 1) == '\r') | |
4070 | { | |
4071 | /* If the last character is CR, we can't handle it here | |
4072 | because LF will be in the not-yet-decoded source text. | |
4073 | Recorded that the CR is not yet processed. */ | |
4074 | coding->spec.ccl.cr_carryover = 1; | |
4075 | coding->produced--; | |
4076 | coding->produced_char--; | |
4077 | pend--; | |
4078 | } | |
4079 | while (ptr < pend) | |
4080 | { | |
4081 | if (*ptr == '\r') | |
4082 | { | |
4083 | if (ptr + 1 < pend && *(ptr + 1) == '\n') | |
4084 | { | |
4085 | *p++ = '\n'; | |
4086 | ptr += 2; | |
4087 | } | |
4088 | else | |
4089 | { | |
4090 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4091 | goto undo_eol_conversion; | |
4092 | *p++ = *ptr++; | |
4093 | } | |
4094 | } | |
4095 | else if (*ptr == '\n' | |
4096 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4097 | goto undo_eol_conversion; | |
4098 | else | |
4099 | *p++ = *ptr++; | |
4100 | continue; | |
4101 | ||
4102 | undo_eol_conversion: | |
4103 | /* We have faced with inconsistent EOL format at PTR. | |
4104 | Convert all LFs before PTR back to CRLFs. */ | |
4105 | for (p--, ptr--; p >= pstart; p--) | |
4106 | { | |
4107 | if (*p == '\n') | |
4108 | *ptr-- = '\n', *ptr-- = '\r'; | |
4109 | else | |
4110 | *ptr-- = *p; | |
4111 | } | |
4112 | /* If carryover is recorded, cancel it because we don't | |
4113 | convert CRLF anymore. */ | |
4114 | if (coding->spec.ccl.cr_carryover) | |
4115 | { | |
4116 | coding->spec.ccl.cr_carryover = 0; | |
4117 | coding->produced++; | |
4118 | coding->produced_char++; | |
4119 | pend++; | |
4120 | } | |
4121 | p = ptr = pend; | |
4122 | coding->eol_type = CODING_EOL_LF; | |
4123 | coding->symbol = saved_coding_symbol; | |
4124 | } | |
4125 | if (p < pend) | |
4126 | { | |
4127 | /* As each two-byte sequence CRLF was converted to LF, (PEND | |
4128 | - P) is the number of deleted characters. */ | |
4129 | coding->produced -= pend - p; | |
4130 | coding->produced_char -= pend - p; | |
4131 | } | |
4132 | } | |
4133 | else /* i.e. coding->eol_type == CODING_EOL_CR */ | |
4134 | { | |
4135 | unsigned char *p = ptr; | |
4136 | ||
4137 | for (; ptr < pend; ptr++) | |
4138 | { | |
4139 | if (*ptr == '\r') | |
4140 | *ptr = '\n'; | |
4141 | else if (*ptr == '\n' | |
4142 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4143 | { | |
4144 | for (; p < ptr; p++) | |
4145 | { | |
4146 | if (*p == '\n') | |
4147 | *p = '\r'; | |
4148 | } | |
4149 | ptr = pend; | |
4150 | coding->eol_type = CODING_EOL_LF; | |
4151 | coding->symbol = saved_coding_symbol; | |
4152 | } | |
4153 | } | |
4154 | } | |
4155 | } | |
4156 | ||
4ed46869 KH |
4157 | /* See "GENERAL NOTES about `decode_coding_XXX ()' functions". Before |
4158 | decoding, it may detect coding system and format of end-of-line if | |
b73bfc1c KH |
4159 | those are not yet decided. The source should be unibyte, the |
4160 | result is multibyte if CODING->dst_multibyte is nonzero, else | |
4161 | unibyte. */ | |
4ed46869 KH |
4162 | |
4163 | int | |
d46c5b12 | 4164 | decode_coding (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
4165 | struct coding_system *coding; |
4166 | unsigned char *source, *destination; | |
4167 | int src_bytes, dst_bytes; | |
4ed46869 | 4168 | { |
0ef69138 | 4169 | if (coding->type == coding_type_undecided) |
4ed46869 KH |
4170 | detect_coding (coding, source, src_bytes); |
4171 | ||
aaaf0b1e KH |
4172 | if (coding->eol_type == CODING_EOL_UNDECIDED |
4173 | && coding->type != coding_type_ccl) | |
4ed46869 KH |
4174 | detect_eol (coding, source, src_bytes); |
4175 | ||
b73bfc1c KH |
4176 | coding->produced = coding->produced_char = 0; |
4177 | coding->consumed = coding->consumed_char = 0; | |
4178 | coding->errors = 0; | |
4179 | coding->result = CODING_FINISH_NORMAL; | |
4180 | ||
4ed46869 KH |
4181 | switch (coding->type) |
4182 | { | |
4ed46869 | 4183 | case coding_type_sjis: |
b73bfc1c KH |
4184 | decode_coding_sjis_big5 (coding, source, destination, |
4185 | src_bytes, dst_bytes, 1); | |
4ed46869 KH |
4186 | break; |
4187 | ||
4188 | case coding_type_iso2022: | |
b73bfc1c KH |
4189 | decode_coding_iso2022 (coding, source, destination, |
4190 | src_bytes, dst_bytes); | |
4ed46869 KH |
4191 | break; |
4192 | ||
4193 | case coding_type_big5: | |
b73bfc1c KH |
4194 | decode_coding_sjis_big5 (coding, source, destination, |
4195 | src_bytes, dst_bytes, 0); | |
4196 | break; | |
4197 | ||
4198 | case coding_type_emacs_mule: | |
4199 | decode_coding_emacs_mule (coding, source, destination, | |
4200 | src_bytes, dst_bytes); | |
4ed46869 KH |
4201 | break; |
4202 | ||
4203 | case coding_type_ccl: | |
aaaf0b1e KH |
4204 | if (coding->spec.ccl.cr_carryover) |
4205 | { | |
4206 | /* Set the CR which is not processed by the previous call of | |
4207 | decode_eol_post_ccl in DESTINATION. */ | |
4208 | *destination = '\r'; | |
4209 | coding->produced++; | |
4210 | coding->produced_char++; | |
4211 | dst_bytes--; | |
4212 | } | |
4213 | ccl_coding_driver (coding, source, | |
4214 | destination + coding->spec.ccl.cr_carryover, | |
b73bfc1c | 4215 | src_bytes, dst_bytes, 0); |
aaaf0b1e KH |
4216 | if (coding->eol_type != CODING_EOL_LF) |
4217 | decode_eol_post_ccl (coding, destination, coding->produced); | |
d46c5b12 KH |
4218 | break; |
4219 | ||
b73bfc1c KH |
4220 | default: |
4221 | decode_eol (coding, source, destination, src_bytes, dst_bytes); | |
4222 | } | |
4223 | ||
4224 | if (coding->result == CODING_FINISH_INSUFFICIENT_SRC | |
e7c9eef9 | 4225 | && coding->mode & CODING_MODE_LAST_BLOCK |
b73bfc1c KH |
4226 | && coding->consumed == src_bytes) |
4227 | coding->result = CODING_FINISH_NORMAL; | |
4228 | ||
4229 | if (coding->mode & CODING_MODE_LAST_BLOCK | |
4230 | && coding->result == CODING_FINISH_INSUFFICIENT_SRC) | |
4231 | { | |
4232 | unsigned char *src = source + coding->consumed; | |
4233 | unsigned char *dst = destination + coding->produced; | |
4234 | ||
4235 | src_bytes -= coding->consumed; | |
bb10be8b | 4236 | coding->errors++; |
b73bfc1c KH |
4237 | if (COMPOSING_P (coding)) |
4238 | DECODE_COMPOSITION_END ('1'); | |
4239 | while (src_bytes--) | |
d46c5b12 | 4240 | { |
b73bfc1c KH |
4241 | int c = *src++; |
4242 | dst += CHAR_STRING (c, dst); | |
4243 | coding->produced_char++; | |
d46c5b12 | 4244 | } |
b73bfc1c KH |
4245 | coding->consumed = coding->consumed_char = src - source; |
4246 | coding->produced = dst - destination; | |
73be902c | 4247 | coding->result = CODING_FINISH_NORMAL; |
4ed46869 KH |
4248 | } |
4249 | ||
b73bfc1c KH |
4250 | if (!coding->dst_multibyte) |
4251 | { | |
4252 | coding->produced = str_as_unibyte (destination, coding->produced); | |
4253 | coding->produced_char = coding->produced; | |
4254 | } | |
4ed46869 | 4255 | |
b73bfc1c KH |
4256 | return coding->result; |
4257 | } | |
52d41803 | 4258 | |
b73bfc1c KH |
4259 | /* See "GENERAL NOTES about `encode_coding_XXX ()' functions". The |
4260 | multibyteness of the source is CODING->src_multibyte, the | |
4261 | multibyteness of the result is always unibyte. */ | |
4ed46869 KH |
4262 | |
4263 | int | |
d46c5b12 | 4264 | encode_coding (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
4265 | struct coding_system *coding; |
4266 | unsigned char *source, *destination; | |
4267 | int src_bytes, dst_bytes; | |
4ed46869 | 4268 | { |
b73bfc1c KH |
4269 | coding->produced = coding->produced_char = 0; |
4270 | coding->consumed = coding->consumed_char = 0; | |
4271 | coding->errors = 0; | |
4272 | coding->result = CODING_FINISH_NORMAL; | |
4ed46869 | 4273 | |
d46c5b12 KH |
4274 | switch (coding->type) |
4275 | { | |
4ed46869 | 4276 | case coding_type_sjis: |
b73bfc1c KH |
4277 | encode_coding_sjis_big5 (coding, source, destination, |
4278 | src_bytes, dst_bytes, 1); | |
4ed46869 KH |
4279 | break; |
4280 | ||
4281 | case coding_type_iso2022: | |
b73bfc1c KH |
4282 | encode_coding_iso2022 (coding, source, destination, |
4283 | src_bytes, dst_bytes); | |
4ed46869 KH |
4284 | break; |
4285 | ||
4286 | case coding_type_big5: | |
b73bfc1c KH |
4287 | encode_coding_sjis_big5 (coding, source, destination, |
4288 | src_bytes, dst_bytes, 0); | |
4289 | break; | |
4290 | ||
4291 | case coding_type_emacs_mule: | |
4292 | encode_coding_emacs_mule (coding, source, destination, | |
4293 | src_bytes, dst_bytes); | |
4ed46869 KH |
4294 | break; |
4295 | ||
4296 | case coding_type_ccl: | |
b73bfc1c KH |
4297 | ccl_coding_driver (coding, source, destination, |
4298 | src_bytes, dst_bytes, 1); | |
d46c5b12 KH |
4299 | break; |
4300 | ||
b73bfc1c KH |
4301 | default: |
4302 | encode_eol (coding, source, destination, src_bytes, dst_bytes); | |
4303 | } | |
4304 | ||
73be902c KH |
4305 | if (coding->mode & CODING_MODE_LAST_BLOCK |
4306 | && coding->result == CODING_FINISH_INSUFFICIENT_SRC) | |
b73bfc1c KH |
4307 | { |
4308 | unsigned char *src = source + coding->consumed; | |
4309 | unsigned char *src_end = src + src_bytes; | |
4310 | unsigned char *dst = destination + coding->produced; | |
4311 | ||
4312 | if (coding->type == coding_type_iso2022) | |
4313 | ENCODE_RESET_PLANE_AND_REGISTER; | |
4314 | if (COMPOSING_P (coding)) | |
4315 | *dst++ = ISO_CODE_ESC, *dst++ = '1'; | |
4316 | if (coding->consumed < src_bytes) | |
d46c5b12 | 4317 | { |
b73bfc1c KH |
4318 | int len = src_bytes - coding->consumed; |
4319 | ||
4320 | BCOPY_SHORT (source + coding->consumed, dst, len); | |
4321 | if (coding->src_multibyte) | |
4322 | len = str_as_unibyte (dst, len); | |
4323 | dst += len; | |
4324 | coding->consumed = src_bytes; | |
d46c5b12 | 4325 | } |
b73bfc1c | 4326 | coding->produced = coding->produced_char = dst - destination; |
73be902c | 4327 | coding->result = CODING_FINISH_NORMAL; |
4ed46869 KH |
4328 | } |
4329 | ||
bb10be8b KH |
4330 | if (coding->result == CODING_FINISH_INSUFFICIENT_SRC |
4331 | && coding->consumed == src_bytes) | |
4332 | coding->result = CODING_FINISH_NORMAL; | |
4333 | ||
b73bfc1c | 4334 | return coding->result; |
4ed46869 KH |
4335 | } |
4336 | ||
fb88bf2d KH |
4337 | /* Scan text in the region between *BEG and *END (byte positions), |
4338 | skip characters which we don't have to decode by coding system | |
4339 | CODING at the head and tail, then set *BEG and *END to the region | |
4340 | of the text we actually have to convert. The caller should move | |
b73bfc1c KH |
4341 | the gap out of the region in advance if the region is from a |
4342 | buffer. | |
4ed46869 | 4343 | |
d46c5b12 KH |
4344 | If STR is not NULL, *BEG and *END are indices into STR. */ |
4345 | ||
4346 | static void | |
4347 | shrink_decoding_region (beg, end, coding, str) | |
4348 | int *beg, *end; | |
4349 | struct coding_system *coding; | |
4350 | unsigned char *str; | |
4351 | { | |
fb88bf2d | 4352 | unsigned char *begp_orig, *begp, *endp_orig, *endp, c; |
d46c5b12 | 4353 | int eol_conversion; |
88993dfd | 4354 | Lisp_Object translation_table; |
d46c5b12 KH |
4355 | |
4356 | if (coding->type == coding_type_ccl | |
4357 | || coding->type == coding_type_undecided | |
b73bfc1c KH |
4358 | || coding->eol_type != CODING_EOL_LF |
4359 | || !NILP (coding->post_read_conversion) | |
4360 | || coding->composing != COMPOSITION_DISABLED) | |
d46c5b12 KH |
4361 | { |
4362 | /* We can't skip any data. */ | |
4363 | return; | |
4364 | } | |
b73bfc1c KH |
4365 | if (coding->type == coding_type_no_conversion |
4366 | || coding->type == coding_type_raw_text | |
4367 | || coding->type == coding_type_emacs_mule) | |
d46c5b12 | 4368 | { |
fb88bf2d KH |
4369 | /* We need no conversion, but don't have to skip any data here. |
4370 | Decoding routine handles them effectively anyway. */ | |
d46c5b12 KH |
4371 | return; |
4372 | } | |
4373 | ||
88993dfd KH |
4374 | translation_table = coding->translation_table_for_decode; |
4375 | if (NILP (translation_table) && !NILP (Venable_character_translation)) | |
4376 | translation_table = Vstandard_translation_table_for_decode; | |
4377 | if (CHAR_TABLE_P (translation_table)) | |
4378 | { | |
4379 | int i; | |
4380 | for (i = 0; i < 128; i++) | |
4381 | if (!NILP (CHAR_TABLE_REF (translation_table, i))) | |
4382 | break; | |
4383 | if (i < 128) | |
fa46990e | 4384 | /* Some ASCII character should be translated. We give up |
88993dfd KH |
4385 | shrinking. */ |
4386 | return; | |
4387 | } | |
4388 | ||
b73bfc1c | 4389 | if (coding->heading_ascii >= 0) |
d46c5b12 KH |
4390 | /* Detection routine has already found how much we can skip at the |
4391 | head. */ | |
4392 | *beg += coding->heading_ascii; | |
4393 | ||
4394 | if (str) | |
4395 | { | |
4396 | begp_orig = begp = str + *beg; | |
4397 | endp_orig = endp = str + *end; | |
4398 | } | |
4399 | else | |
4400 | { | |
fb88bf2d | 4401 | begp_orig = begp = BYTE_POS_ADDR (*beg); |
d46c5b12 KH |
4402 | endp_orig = endp = begp + *end - *beg; |
4403 | } | |
4404 | ||
fa46990e DL |
4405 | eol_conversion = (coding->eol_type == CODING_EOL_CR |
4406 | || coding->eol_type == CODING_EOL_CRLF); | |
4407 | ||
d46c5b12 KH |
4408 | switch (coding->type) |
4409 | { | |
d46c5b12 KH |
4410 | case coding_type_sjis: |
4411 | case coding_type_big5: | |
4412 | /* We can skip all ASCII characters at the head. */ | |
4413 | if (coding->heading_ascii < 0) | |
4414 | { | |
4415 | if (eol_conversion) | |
de9d083c | 4416 | while (begp < endp && *begp < 0x80 && *begp != '\r') begp++; |
d46c5b12 KH |
4417 | else |
4418 | while (begp < endp && *begp < 0x80) begp++; | |
4419 | } | |
4420 | /* We can skip all ASCII characters at the tail except for the | |
4421 | second byte of SJIS or BIG5 code. */ | |
4422 | if (eol_conversion) | |
de9d083c | 4423 | while (begp < endp && endp[-1] < 0x80 && endp[-1] != '\r') endp--; |
d46c5b12 KH |
4424 | else |
4425 | while (begp < endp && endp[-1] < 0x80) endp--; | |
ee59c65f RS |
4426 | /* Do not consider LF as ascii if preceded by CR, since that |
4427 | confuses eol decoding. */ | |
4428 | if (begp < endp && endp < endp_orig && endp[-1] == '\r' && endp[0] == '\n') | |
4429 | endp++; | |
d46c5b12 KH |
4430 | if (begp < endp && endp < endp_orig && endp[-1] >= 0x80) |
4431 | endp++; | |
4432 | break; | |
4433 | ||
b73bfc1c | 4434 | case coding_type_iso2022: |
622fece5 KH |
4435 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, 0) != CHARSET_ASCII) |
4436 | /* We can't skip any data. */ | |
4437 | break; | |
d46c5b12 KH |
4438 | if (coding->heading_ascii < 0) |
4439 | { | |
d46c5b12 KH |
4440 | /* We can skip all ASCII characters at the head except for a |
4441 | few control codes. */ | |
4442 | while (begp < endp && (c = *begp) < 0x80 | |
4443 | && c != ISO_CODE_CR && c != ISO_CODE_SO | |
4444 | && c != ISO_CODE_SI && c != ISO_CODE_ESC | |
4445 | && (!eol_conversion || c != ISO_CODE_LF)) | |
4446 | begp++; | |
4447 | } | |
4448 | switch (coding->category_idx) | |
4449 | { | |
4450 | case CODING_CATEGORY_IDX_ISO_8_1: | |
4451 | case CODING_CATEGORY_IDX_ISO_8_2: | |
4452 | /* We can skip all ASCII characters at the tail. */ | |
4453 | if (eol_conversion) | |
de9d083c | 4454 | while (begp < endp && (c = endp[-1]) < 0x80 && c != '\r') endp--; |
d46c5b12 KH |
4455 | else |
4456 | while (begp < endp && endp[-1] < 0x80) endp--; | |
ee59c65f RS |
4457 | /* Do not consider LF as ascii if preceded by CR, since that |
4458 | confuses eol decoding. */ | |
4459 | if (begp < endp && endp < endp_orig && endp[-1] == '\r' && endp[0] == '\n') | |
4460 | endp++; | |
d46c5b12 KH |
4461 | break; |
4462 | ||
4463 | case CODING_CATEGORY_IDX_ISO_7: | |
4464 | case CODING_CATEGORY_IDX_ISO_7_TIGHT: | |
de79a6a5 KH |
4465 | { |
4466 | /* We can skip all charactes at the tail except for 8-bit | |
4467 | codes and ESC and the following 2-byte at the tail. */ | |
4468 | unsigned char *eight_bit = NULL; | |
4469 | ||
4470 | if (eol_conversion) | |
4471 | while (begp < endp | |
4472 | && (c = endp[-1]) != ISO_CODE_ESC && c != '\r') | |
4473 | { | |
4474 | if (!eight_bit && c & 0x80) eight_bit = endp; | |
4475 | endp--; | |
4476 | } | |
4477 | else | |
4478 | while (begp < endp | |
4479 | && (c = endp[-1]) != ISO_CODE_ESC) | |
4480 | { | |
4481 | if (!eight_bit && c & 0x80) eight_bit = endp; | |
4482 | endp--; | |
4483 | } | |
4484 | /* Do not consider LF as ascii if preceded by CR, since that | |
4485 | confuses eol decoding. */ | |
4486 | if (begp < endp && endp < endp_orig | |
4487 | && endp[-1] == '\r' && endp[0] == '\n') | |
4488 | endp++; | |
4489 | if (begp < endp && endp[-1] == ISO_CODE_ESC) | |
4490 | { | |
4491 | if (endp + 1 < endp_orig && end[0] == '(' && end[1] == 'B') | |
4492 | /* This is an ASCII designation sequence. We can | |
4493 | surely skip the tail. But, if we have | |
4494 | encountered an 8-bit code, skip only the codes | |
4495 | after that. */ | |
4496 | endp = eight_bit ? eight_bit : endp + 2; | |
4497 | else | |
4498 | /* Hmmm, we can't skip the tail. */ | |
4499 | endp = endp_orig; | |
4500 | } | |
4501 | else if (eight_bit) | |
4502 | endp = eight_bit; | |
4503 | } | |
d46c5b12 | 4504 | } |
b73bfc1c KH |
4505 | break; |
4506 | ||
4507 | default: | |
4508 | abort (); | |
d46c5b12 KH |
4509 | } |
4510 | *beg += begp - begp_orig; | |
4511 | *end += endp - endp_orig; | |
4512 | return; | |
4513 | } | |
4514 | ||
4515 | /* Like shrink_decoding_region but for encoding. */ | |
4516 | ||
4517 | static void | |
4518 | shrink_encoding_region (beg, end, coding, str) | |
4519 | int *beg, *end; | |
4520 | struct coding_system *coding; | |
4521 | unsigned char *str; | |
4522 | { | |
4523 | unsigned char *begp_orig, *begp, *endp_orig, *endp; | |
4524 | int eol_conversion; | |
88993dfd | 4525 | Lisp_Object translation_table; |
d46c5b12 | 4526 | |
b73bfc1c KH |
4527 | if (coding->type == coding_type_ccl |
4528 | || coding->eol_type == CODING_EOL_CRLF | |
4529 | || coding->eol_type == CODING_EOL_CR | |
4530 | || coding->cmp_data && coding->cmp_data->used > 0) | |
d46c5b12 | 4531 | { |
b73bfc1c KH |
4532 | /* We can't skip any data. */ |
4533 | return; | |
4534 | } | |
4535 | if (coding->type == coding_type_no_conversion | |
4536 | || coding->type == coding_type_raw_text | |
4537 | || coding->type == coding_type_emacs_mule | |
4538 | || coding->type == coding_type_undecided) | |
4539 | { | |
4540 | /* We need no conversion, but don't have to skip any data here. | |
4541 | Encoding routine handles them effectively anyway. */ | |
d46c5b12 KH |
4542 | return; |
4543 | } | |
4544 | ||
88993dfd KH |
4545 | translation_table = coding->translation_table_for_encode; |
4546 | if (NILP (translation_table) && !NILP (Venable_character_translation)) | |
4547 | translation_table = Vstandard_translation_table_for_encode; | |
4548 | if (CHAR_TABLE_P (translation_table)) | |
4549 | { | |
4550 | int i; | |
4551 | for (i = 0; i < 128; i++) | |
4552 | if (!NILP (CHAR_TABLE_REF (translation_table, i))) | |
4553 | break; | |
4554 | if (i < 128) | |
4555 | /* Some ASCII character should be tranlsated. We give up | |
4556 | shrinking. */ | |
4557 | return; | |
4558 | } | |
4559 | ||
d46c5b12 KH |
4560 | if (str) |
4561 | { | |
4562 | begp_orig = begp = str + *beg; | |
4563 | endp_orig = endp = str + *end; | |
4564 | } | |
4565 | else | |
4566 | { | |
fb88bf2d | 4567 | begp_orig = begp = BYTE_POS_ADDR (*beg); |
d46c5b12 KH |
4568 | endp_orig = endp = begp + *end - *beg; |
4569 | } | |
4570 | ||
4571 | eol_conversion = (coding->eol_type == CODING_EOL_CR | |
4572 | || coding->eol_type == CODING_EOL_CRLF); | |
4573 | ||
4574 | /* Here, we don't have to check coding->pre_write_conversion because | |
4575 | the caller is expected to have handled it already. */ | |
4576 | switch (coding->type) | |
4577 | { | |
d46c5b12 | 4578 | case coding_type_iso2022: |
622fece5 KH |
4579 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, 0) != CHARSET_ASCII) |
4580 | /* We can't skip any data. */ | |
4581 | break; | |
d46c5b12 KH |
4582 | if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL) |
4583 | { | |
4584 | unsigned char *bol = begp; | |
4585 | while (begp < endp && *begp < 0x80) | |
4586 | { | |
4587 | begp++; | |
4588 | if (begp[-1] == '\n') | |
4589 | bol = begp; | |
4590 | } | |
4591 | begp = bol; | |
4592 | goto label_skip_tail; | |
4593 | } | |
4594 | /* fall down ... */ | |
4595 | ||
b73bfc1c KH |
4596 | case coding_type_sjis: |
4597 | case coding_type_big5: | |
d46c5b12 KH |
4598 | /* We can skip all ASCII characters at the head and tail. */ |
4599 | if (eol_conversion) | |
4600 | while (begp < endp && *begp < 0x80 && *begp != '\n') begp++; | |
4601 | else | |
4602 | while (begp < endp && *begp < 0x80) begp++; | |
4603 | label_skip_tail: | |
4604 | if (eol_conversion) | |
4605 | while (begp < endp && endp[-1] < 0x80 && endp[-1] != '\n') endp--; | |
4606 | else | |
4607 | while (begp < endp && *(endp - 1) < 0x80) endp--; | |
4608 | break; | |
b73bfc1c KH |
4609 | |
4610 | default: | |
4611 | abort (); | |
d46c5b12 KH |
4612 | } |
4613 | ||
4614 | *beg += begp - begp_orig; | |
4615 | *end += endp - endp_orig; | |
4616 | return; | |
4617 | } | |
4618 | ||
88993dfd KH |
4619 | /* As shrinking conversion region requires some overhead, we don't try |
4620 | shrinking if the length of conversion region is less than this | |
4621 | value. */ | |
4622 | static int shrink_conversion_region_threshhold = 1024; | |
4623 | ||
4624 | #define SHRINK_CONVERSION_REGION(beg, end, coding, str, encodep) \ | |
4625 | do { \ | |
4626 | if (*(end) - *(beg) > shrink_conversion_region_threshhold) \ | |
4627 | { \ | |
4628 | if (encodep) shrink_encoding_region (beg, end, coding, str); \ | |
4629 | else shrink_decoding_region (beg, end, coding, str); \ | |
4630 | } \ | |
4631 | } while (0) | |
4632 | ||
b843d1ae KH |
4633 | static Lisp_Object |
4634 | code_convert_region_unwind (dummy) | |
4635 | Lisp_Object dummy; | |
4636 | { | |
4637 | inhibit_pre_post_conversion = 0; | |
4638 | return Qnil; | |
4639 | } | |
4640 | ||
ec6d2bb8 KH |
4641 | /* Store information about all compositions in the range FROM and TO |
4642 | of OBJ in memory blocks pointed by CODING->cmp_data. OBJ is a | |
4643 | buffer or a string, defaults to the current buffer. */ | |
4644 | ||
4645 | void | |
4646 | coding_save_composition (coding, from, to, obj) | |
4647 | struct coding_system *coding; | |
4648 | int from, to; | |
4649 | Lisp_Object obj; | |
4650 | { | |
4651 | Lisp_Object prop; | |
4652 | int start, end; | |
4653 | ||
91bee881 KH |
4654 | if (coding->composing == COMPOSITION_DISABLED) |
4655 | return; | |
4656 | if (!coding->cmp_data) | |
4657 | coding_allocate_composition_data (coding, from); | |
ec6d2bb8 KH |
4658 | if (!find_composition (from, to, &start, &end, &prop, obj) |
4659 | || end > to) | |
4660 | return; | |
4661 | if (start < from | |
4662 | && (!find_composition (end, to, &start, &end, &prop, obj) | |
4663 | || end > to)) | |
4664 | return; | |
4665 | coding->composing = COMPOSITION_NO; | |
ec6d2bb8 KH |
4666 | do |
4667 | { | |
4668 | if (COMPOSITION_VALID_P (start, end, prop)) | |
4669 | { | |
4670 | enum composition_method method = COMPOSITION_METHOD (prop); | |
4671 | if (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH | |
4672 | >= COMPOSITION_DATA_SIZE) | |
4673 | coding_allocate_composition_data (coding, from); | |
4674 | /* For relative composition, we remember start and end | |
4675 | positions, for the other compositions, we also remember | |
4676 | components. */ | |
4677 | CODING_ADD_COMPOSITION_START (coding, start - from, method); | |
4678 | if (method != COMPOSITION_RELATIVE) | |
4679 | { | |
4680 | /* We must store a*/ | |
4681 | Lisp_Object val, ch; | |
4682 | ||
4683 | val = COMPOSITION_COMPONENTS (prop); | |
4684 | if (CONSP (val)) | |
4685 | while (CONSP (val)) | |
4686 | { | |
4687 | ch = XCAR (val), val = XCDR (val); | |
4688 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (ch)); | |
4689 | } | |
4690 | else if (VECTORP (val) || STRINGP (val)) | |
4691 | { | |
4692 | int len = (VECTORP (val) | |
4693 | ? XVECTOR (val)->size : XSTRING (val)->size); | |
4694 | int i; | |
4695 | for (i = 0; i < len; i++) | |
4696 | { | |
4697 | ch = (STRINGP (val) | |
4698 | ? Faref (val, make_number (i)) | |
4699 | : XVECTOR (val)->contents[i]); | |
4700 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (ch)); | |
4701 | } | |
4702 | } | |
4703 | else /* INTEGERP (val) */ | |
4704 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (val)); | |
4705 | } | |
4706 | CODING_ADD_COMPOSITION_END (coding, end - from); | |
4707 | } | |
4708 | start = end; | |
4709 | } | |
4710 | while (start < to | |
4711 | && find_composition (start, to, &start, &end, &prop, obj) | |
4712 | && end <= to); | |
4713 | ||
4714 | /* Make coding->cmp_data point to the first memory block. */ | |
4715 | while (coding->cmp_data->prev) | |
4716 | coding->cmp_data = coding->cmp_data->prev; | |
4717 | coding->cmp_data_start = 0; | |
4718 | } | |
4719 | ||
4720 | /* Reflect the saved information about compositions to OBJ. | |
4721 | CODING->cmp_data points to a memory block for the informaiton. OBJ | |
4722 | is a buffer or a string, defaults to the current buffer. */ | |
4723 | ||
33fb63eb | 4724 | void |
ec6d2bb8 KH |
4725 | coding_restore_composition (coding, obj) |
4726 | struct coding_system *coding; | |
4727 | Lisp_Object obj; | |
4728 | { | |
4729 | struct composition_data *cmp_data = coding->cmp_data; | |
4730 | ||
4731 | if (!cmp_data) | |
4732 | return; | |
4733 | ||
4734 | while (cmp_data->prev) | |
4735 | cmp_data = cmp_data->prev; | |
4736 | ||
4737 | while (cmp_data) | |
4738 | { | |
4739 | int i; | |
4740 | ||
78108bcd KH |
4741 | for (i = 0; i < cmp_data->used && cmp_data->data[i] > 0; |
4742 | i += cmp_data->data[i]) | |
ec6d2bb8 KH |
4743 | { |
4744 | int *data = cmp_data->data + i; | |
4745 | enum composition_method method = (enum composition_method) data[3]; | |
4746 | Lisp_Object components; | |
4747 | ||
4748 | if (method == COMPOSITION_RELATIVE) | |
4749 | components = Qnil; | |
4750 | else | |
4751 | { | |
4752 | int len = data[0] - 4, j; | |
4753 | Lisp_Object args[MAX_COMPOSITION_COMPONENTS * 2 - 1]; | |
4754 | ||
4755 | for (j = 0; j < len; j++) | |
4756 | args[j] = make_number (data[4 + j]); | |
4757 | components = (method == COMPOSITION_WITH_ALTCHARS | |
4758 | ? Fstring (len, args) : Fvector (len, args)); | |
4759 | } | |
4760 | compose_text (data[1], data[2], components, Qnil, obj); | |
4761 | } | |
4762 | cmp_data = cmp_data->next; | |
4763 | } | |
4764 | } | |
4765 | ||
d46c5b12 | 4766 | /* Decode (if ENCODEP is zero) or encode (if ENCODEP is nonzero) the |
fb88bf2d KH |
4767 | text from FROM to TO (byte positions are FROM_BYTE and TO_BYTE) by |
4768 | coding system CODING, and return the status code of code conversion | |
4769 | (currently, this value has no meaning). | |
4770 | ||
4771 | How many characters (and bytes) are converted to how many | |
4772 | characters (and bytes) are recorded in members of the structure | |
4773 | CODING. | |
d46c5b12 | 4774 | |
6e44253b | 4775 | If REPLACE is nonzero, we do various things as if the original text |
d46c5b12 | 4776 | is deleted and a new text is inserted. See the comments in |
b73bfc1c KH |
4777 | replace_range (insdel.c) to know what we are doing. |
4778 | ||
4779 | If REPLACE is zero, it is assumed that the source text is unibyte. | |
4780 | Otherwize, it is assumed that the source text is multibyte. */ | |
4ed46869 KH |
4781 | |
4782 | int | |
6e44253b KH |
4783 | code_convert_region (from, from_byte, to, to_byte, coding, encodep, replace) |
4784 | int from, from_byte, to, to_byte, encodep, replace; | |
4ed46869 | 4785 | struct coding_system *coding; |
4ed46869 | 4786 | { |
fb88bf2d KH |
4787 | int len = to - from, len_byte = to_byte - from_byte; |
4788 | int require, inserted, inserted_byte; | |
4b39528c | 4789 | int head_skip, tail_skip, total_skip = 0; |
84d60297 | 4790 | Lisp_Object saved_coding_symbol; |
fb88bf2d | 4791 | int first = 1; |
fb88bf2d | 4792 | unsigned char *src, *dst; |
84d60297 | 4793 | Lisp_Object deletion; |
e133c8fa | 4794 | int orig_point = PT, orig_len = len; |
6abb9bd9 | 4795 | int prev_Z; |
b73bfc1c KH |
4796 | int multibyte_p = !NILP (current_buffer->enable_multibyte_characters); |
4797 | ||
4798 | coding->src_multibyte = replace && multibyte_p; | |
4799 | coding->dst_multibyte = multibyte_p; | |
84d60297 RS |
4800 | |
4801 | deletion = Qnil; | |
4802 | saved_coding_symbol = Qnil; | |
d46c5b12 | 4803 | |
83fa074f | 4804 | if (from < PT && PT < to) |
e133c8fa KH |
4805 | { |
4806 | TEMP_SET_PT_BOTH (from, from_byte); | |
4807 | orig_point = from; | |
4808 | } | |
83fa074f | 4809 | |
6e44253b | 4810 | if (replace) |
d46c5b12 | 4811 | { |
fb88bf2d | 4812 | int saved_from = from; |
e077cc80 | 4813 | int saved_inhibit_modification_hooks; |
fb88bf2d | 4814 | |
d46c5b12 | 4815 | prepare_to_modify_buffer (from, to, &from); |
fb88bf2d KH |
4816 | if (saved_from != from) |
4817 | { | |
4818 | to = from + len; | |
b73bfc1c | 4819 | from_byte = CHAR_TO_BYTE (from), to_byte = CHAR_TO_BYTE (to); |
fb88bf2d KH |
4820 | len_byte = to_byte - from_byte; |
4821 | } | |
e077cc80 KH |
4822 | |
4823 | /* The code conversion routine can not preserve text properties | |
4824 | for now. So, we must remove all text properties in the | |
4825 | region. Here, we must suppress all modification hooks. */ | |
4826 | saved_inhibit_modification_hooks = inhibit_modification_hooks; | |
4827 | inhibit_modification_hooks = 1; | |
4828 | Fset_text_properties (make_number (from), make_number (to), Qnil, Qnil); | |
4829 | inhibit_modification_hooks = saved_inhibit_modification_hooks; | |
d46c5b12 | 4830 | } |
d46c5b12 KH |
4831 | |
4832 | if (! encodep && CODING_REQUIRE_DETECTION (coding)) | |
4833 | { | |
12410ef1 | 4834 | /* We must detect encoding of text and eol format. */ |
d46c5b12 KH |
4835 | |
4836 | if (from < GPT && to > GPT) | |
4837 | move_gap_both (from, from_byte); | |
4838 | if (coding->type == coding_type_undecided) | |
4839 | { | |
fb88bf2d | 4840 | detect_coding (coding, BYTE_POS_ADDR (from_byte), len_byte); |
d46c5b12 | 4841 | if (coding->type == coding_type_undecided) |
62b3ef1d KH |
4842 | { |
4843 | /* It seems that the text contains only ASCII, but we | |
d9aef30f | 4844 | should not leave it undecided because the deeper |
62b3ef1d KH |
4845 | decoding routine (decode_coding) tries to detect the |
4846 | encodings again in vain. */ | |
4847 | coding->type = coding_type_emacs_mule; | |
4848 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
4849 | } | |
d46c5b12 | 4850 | } |
aaaf0b1e KH |
4851 | if (coding->eol_type == CODING_EOL_UNDECIDED |
4852 | && coding->type != coding_type_ccl) | |
d46c5b12 KH |
4853 | { |
4854 | saved_coding_symbol = coding->symbol; | |
4855 | detect_eol (coding, BYTE_POS_ADDR (from_byte), len_byte); | |
4856 | if (coding->eol_type == CODING_EOL_UNDECIDED) | |
4857 | coding->eol_type = CODING_EOL_LF; | |
4858 | /* We had better recover the original eol format if we | |
4859 | encounter an inconsitent eol format while decoding. */ | |
4860 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; | |
4861 | } | |
4862 | } | |
4863 | ||
d46c5b12 KH |
4864 | /* Now we convert the text. */ |
4865 | ||
4866 | /* For encoding, we must process pre-write-conversion in advance. */ | |
b73bfc1c KH |
4867 | if (! inhibit_pre_post_conversion |
4868 | && encodep | |
d46c5b12 KH |
4869 | && SYMBOLP (coding->pre_write_conversion) |
4870 | && ! NILP (Ffboundp (coding->pre_write_conversion))) | |
4871 | { | |
2b4f9037 KH |
4872 | /* The function in pre-write-conversion may put a new text in a |
4873 | new buffer. */ | |
0007bdd0 KH |
4874 | struct buffer *prev = current_buffer; |
4875 | Lisp_Object new; | |
b843d1ae | 4876 | int count = specpdl_ptr - specpdl; |
d46c5b12 | 4877 | |
b843d1ae KH |
4878 | record_unwind_protect (code_convert_region_unwind, Qnil); |
4879 | /* We should not call any more pre-write/post-read-conversion | |
4880 | functions while this pre-write-conversion is running. */ | |
4881 | inhibit_pre_post_conversion = 1; | |
b39f748c AS |
4882 | call2 (coding->pre_write_conversion, |
4883 | make_number (from), make_number (to)); | |
b843d1ae KH |
4884 | inhibit_pre_post_conversion = 0; |
4885 | /* Discard the unwind protect. */ | |
4886 | specpdl_ptr--; | |
4887 | ||
d46c5b12 KH |
4888 | if (current_buffer != prev) |
4889 | { | |
4890 | len = ZV - BEGV; | |
0007bdd0 | 4891 | new = Fcurrent_buffer (); |
d46c5b12 | 4892 | set_buffer_internal_1 (prev); |
7dae4502 | 4893 | del_range_2 (from, from_byte, to, to_byte, 0); |
e133c8fa | 4894 | TEMP_SET_PT_BOTH (from, from_byte); |
0007bdd0 KH |
4895 | insert_from_buffer (XBUFFER (new), 1, len, 0); |
4896 | Fkill_buffer (new); | |
e133c8fa KH |
4897 | if (orig_point >= to) |
4898 | orig_point += len - orig_len; | |
4899 | else if (orig_point > from) | |
4900 | orig_point = from; | |
4901 | orig_len = len; | |
d46c5b12 | 4902 | to = from + len; |
b73bfc1c KH |
4903 | from_byte = CHAR_TO_BYTE (from); |
4904 | to_byte = CHAR_TO_BYTE (to); | |
d46c5b12 | 4905 | len_byte = to_byte - from_byte; |
e133c8fa | 4906 | TEMP_SET_PT_BOTH (from, from_byte); |
d46c5b12 KH |
4907 | } |
4908 | } | |
4909 | ||
12410ef1 KH |
4910 | if (replace) |
4911 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); | |
4912 | ||
ec6d2bb8 KH |
4913 | if (coding->composing != COMPOSITION_DISABLED) |
4914 | { | |
4915 | if (encodep) | |
4916 | coding_save_composition (coding, from, to, Fcurrent_buffer ()); | |
4917 | else | |
4918 | coding_allocate_composition_data (coding, from); | |
4919 | } | |
fb88bf2d | 4920 | |
b73bfc1c | 4921 | /* Try to skip the heading and tailing ASCIIs. */ |
4956c225 KH |
4922 | if (coding->type != coding_type_ccl) |
4923 | { | |
4924 | int from_byte_orig = from_byte, to_byte_orig = to_byte; | |
ec6d2bb8 | 4925 | |
4956c225 KH |
4926 | if (from < GPT && GPT < to) |
4927 | move_gap_both (from, from_byte); | |
4928 | SHRINK_CONVERSION_REGION (&from_byte, &to_byte, coding, NULL, encodep); | |
4929 | if (from_byte == to_byte | |
4930 | && (encodep || NILP (coding->post_read_conversion)) | |
4931 | && ! CODING_REQUIRE_FLUSHING (coding)) | |
4932 | { | |
4933 | coding->produced = len_byte; | |
4934 | coding->produced_char = len; | |
4935 | if (!replace) | |
4936 | /* We must record and adjust for this new text now. */ | |
4937 | adjust_after_insert (from, from_byte_orig, to, to_byte_orig, len); | |
4938 | return 0; | |
4939 | } | |
4940 | ||
4941 | head_skip = from_byte - from_byte_orig; | |
4942 | tail_skip = to_byte_orig - to_byte; | |
4943 | total_skip = head_skip + tail_skip; | |
4944 | from += head_skip; | |
4945 | to -= tail_skip; | |
4946 | len -= total_skip; len_byte -= total_skip; | |
4947 | } | |
d46c5b12 | 4948 | |
fb88bf2d KH |
4949 | /* For converion, we must put the gap before the text in addition to |
4950 | making the gap larger for efficient decoding. The required gap | |
4951 | size starts from 2000 which is the magic number used in make_gap. | |
4952 | But, after one batch of conversion, it will be incremented if we | |
4953 | find that it is not enough . */ | |
d46c5b12 KH |
4954 | require = 2000; |
4955 | ||
4956 | if (GAP_SIZE < require) | |
4957 | make_gap (require - GAP_SIZE); | |
4958 | move_gap_both (from, from_byte); | |
4959 | ||
d46c5b12 | 4960 | inserted = inserted_byte = 0; |
fb88bf2d KH |
4961 | |
4962 | GAP_SIZE += len_byte; | |
4963 | ZV -= len; | |
4964 | Z -= len; | |
4965 | ZV_BYTE -= len_byte; | |
4966 | Z_BYTE -= len_byte; | |
4967 | ||
d9f9a1bc GM |
4968 | if (GPT - BEG < BEG_UNCHANGED) |
4969 | BEG_UNCHANGED = GPT - BEG; | |
4970 | if (Z - GPT < END_UNCHANGED) | |
4971 | END_UNCHANGED = Z - GPT; | |
f2558efd | 4972 | |
b73bfc1c KH |
4973 | if (!encodep && coding->src_multibyte) |
4974 | { | |
4975 | /* Decoding routines expects that the source text is unibyte. | |
4976 | We must convert 8-bit characters of multibyte form to | |
4977 | unibyte. */ | |
4978 | int len_byte_orig = len_byte; | |
4979 | len_byte = str_as_unibyte (GAP_END_ADDR - len_byte, len_byte); | |
4980 | if (len_byte < len_byte_orig) | |
4981 | safe_bcopy (GAP_END_ADDR - len_byte_orig, GAP_END_ADDR - len_byte, | |
4982 | len_byte); | |
4983 | coding->src_multibyte = 0; | |
4984 | } | |
4985 | ||
d46c5b12 KH |
4986 | for (;;) |
4987 | { | |
fb88bf2d | 4988 | int result; |
d46c5b12 | 4989 | |
ec6d2bb8 | 4990 | /* The buffer memory is now: |
b73bfc1c KH |
4991 | +--------+converted-text+---------+-------original-text-------+---+ |
4992 | |<-from->|<--inserted-->|---------|<--------len_byte--------->|---| | |
4993 | |<---------------------- GAP ----------------------->| */ | |
ec6d2bb8 KH |
4994 | src = GAP_END_ADDR - len_byte; |
4995 | dst = GPT_ADDR + inserted_byte; | |
4996 | ||
d46c5b12 | 4997 | if (encodep) |
fb88bf2d | 4998 | result = encode_coding (coding, src, dst, len_byte, 0); |
d46c5b12 | 4999 | else |
fb88bf2d | 5000 | result = decode_coding (coding, src, dst, len_byte, 0); |
ec6d2bb8 KH |
5001 | |
5002 | /* The buffer memory is now: | |
b73bfc1c KH |
5003 | +--------+-------converted-text----+--+------original-text----+---+ |
5004 | |<-from->|<-inserted->|<-produced->|--|<-(len_byte-consumed)->|---| | |
5005 | |<---------------------- GAP ----------------------->| */ | |
ec6d2bb8 | 5006 | |
d46c5b12 KH |
5007 | inserted += coding->produced_char; |
5008 | inserted_byte += coding->produced; | |
d46c5b12 | 5009 | len_byte -= coding->consumed; |
ec6d2bb8 KH |
5010 | |
5011 | if (result == CODING_FINISH_INSUFFICIENT_CMP) | |
5012 | { | |
5013 | coding_allocate_composition_data (coding, from + inserted); | |
5014 | continue; | |
5015 | } | |
5016 | ||
fb88bf2d | 5017 | src += coding->consumed; |
3636f7a3 | 5018 | dst += coding->produced; |
d46c5b12 | 5019 | |
9864ebce KH |
5020 | if (result == CODING_FINISH_NORMAL) |
5021 | { | |
5022 | src += len_byte; | |
5023 | break; | |
5024 | } | |
d46c5b12 KH |
5025 | if (! encodep && result == CODING_FINISH_INCONSISTENT_EOL) |
5026 | { | |
fb88bf2d | 5027 | unsigned char *pend = dst, *p = pend - inserted_byte; |
38edf7d4 | 5028 | Lisp_Object eol_type; |
d46c5b12 KH |
5029 | |
5030 | /* Encode LFs back to the original eol format (CR or CRLF). */ | |
5031 | if (coding->eol_type == CODING_EOL_CR) | |
5032 | { | |
5033 | while (p < pend) if (*p++ == '\n') p[-1] = '\r'; | |
5034 | } | |
5035 | else | |
5036 | { | |
d46c5b12 KH |
5037 | int count = 0; |
5038 | ||
fb88bf2d KH |
5039 | while (p < pend) if (*p++ == '\n') count++; |
5040 | if (src - dst < count) | |
d46c5b12 | 5041 | { |
38edf7d4 | 5042 | /* We don't have sufficient room for encoding LFs |
fb88bf2d KH |
5043 | back to CRLF. We must record converted and |
5044 | not-yet-converted text back to the buffer | |
5045 | content, enlarge the gap, then record them out of | |
5046 | the buffer contents again. */ | |
5047 | int add = len_byte + inserted_byte; | |
5048 | ||
5049 | GAP_SIZE -= add; | |
5050 | ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
5051 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5052 | make_gap (count - GAP_SIZE); | |
5053 | GAP_SIZE += add; | |
5054 | ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
5055 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
5056 | /* Don't forget to update SRC, DST, and PEND. */ | |
5057 | src = GAP_END_ADDR - len_byte; | |
5058 | dst = GPT_ADDR + inserted_byte; | |
5059 | pend = dst; | |
d46c5b12 | 5060 | } |
d46c5b12 KH |
5061 | inserted += count; |
5062 | inserted_byte += count; | |
fb88bf2d KH |
5063 | coding->produced += count; |
5064 | p = dst = pend + count; | |
5065 | while (count) | |
5066 | { | |
5067 | *--p = *--pend; | |
5068 | if (*p == '\n') count--, *--p = '\r'; | |
5069 | } | |
d46c5b12 KH |
5070 | } |
5071 | ||
5072 | /* Suppress eol-format conversion in the further conversion. */ | |
5073 | coding->eol_type = CODING_EOL_LF; | |
5074 | ||
38edf7d4 KH |
5075 | /* Set the coding system symbol to that for Unix-like EOL. */ |
5076 | eol_type = Fget (saved_coding_symbol, Qeol_type); | |
5077 | if (VECTORP (eol_type) | |
5078 | && XVECTOR (eol_type)->size == 3 | |
5079 | && SYMBOLP (XVECTOR (eol_type)->contents[CODING_EOL_LF])) | |
5080 | coding->symbol = XVECTOR (eol_type)->contents[CODING_EOL_LF]; | |
5081 | else | |
5082 | coding->symbol = saved_coding_symbol; | |
fb88bf2d KH |
5083 | |
5084 | continue; | |
d46c5b12 KH |
5085 | } |
5086 | if (len_byte <= 0) | |
944bd420 KH |
5087 | { |
5088 | if (coding->type != coding_type_ccl | |
5089 | || coding->mode & CODING_MODE_LAST_BLOCK) | |
5090 | break; | |
5091 | coding->mode |= CODING_MODE_LAST_BLOCK; | |
5092 | continue; | |
5093 | } | |
d46c5b12 KH |
5094 | if (result == CODING_FINISH_INSUFFICIENT_SRC) |
5095 | { | |
5096 | /* The source text ends in invalid codes. Let's just | |
5097 | make them valid buffer contents, and finish conversion. */ | |
fb88bf2d | 5098 | inserted += len_byte; |
d46c5b12 | 5099 | inserted_byte += len_byte; |
fb88bf2d | 5100 | while (len_byte--) |
ee59c65f | 5101 | *dst++ = *src++; |
d46c5b12 KH |
5102 | break; |
5103 | } | |
9864ebce KH |
5104 | if (result == CODING_FINISH_INTERRUPT) |
5105 | { | |
5106 | /* The conversion procedure was interrupted by a user. */ | |
9864ebce KH |
5107 | break; |
5108 | } | |
5109 | /* Now RESULT == CODING_FINISH_INSUFFICIENT_DST */ | |
5110 | if (coding->consumed < 1) | |
5111 | { | |
5112 | /* It's quite strange to require more memory without | |
5113 | consuming any bytes. Perhaps CCL program bug. */ | |
9864ebce KH |
5114 | break; |
5115 | } | |
fb88bf2d KH |
5116 | if (first) |
5117 | { | |
5118 | /* We have just done the first batch of conversion which was | |
5119 | stoped because of insufficient gap. Let's reconsider the | |
5120 | required gap size (i.e. SRT - DST) now. | |
5121 | ||
5122 | We have converted ORIG bytes (== coding->consumed) into | |
5123 | NEW bytes (coding->produced). To convert the remaining | |
5124 | LEN bytes, we may need REQUIRE bytes of gap, where: | |
5125 | REQUIRE + LEN_BYTE = LEN_BYTE * (NEW / ORIG) | |
5126 | REQUIRE = LEN_BYTE * (NEW - ORIG) / ORIG | |
5127 | Here, we are sure that NEW >= ORIG. */ | |
6e44253b KH |
5128 | float ratio = coding->produced - coding->consumed; |
5129 | ratio /= coding->consumed; | |
5130 | require = len_byte * ratio; | |
fb88bf2d KH |
5131 | first = 0; |
5132 | } | |
5133 | if ((src - dst) < (require + 2000)) | |
5134 | { | |
5135 | /* See the comment above the previous call of make_gap. */ | |
5136 | int add = len_byte + inserted_byte; | |
5137 | ||
5138 | GAP_SIZE -= add; | |
5139 | ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
5140 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5141 | make_gap (require + 2000); | |
5142 | GAP_SIZE += add; | |
5143 | ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
5144 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
fb88bf2d | 5145 | } |
d46c5b12 | 5146 | } |
fb88bf2d KH |
5147 | if (src - dst > 0) *dst = 0; /* Put an anchor. */ |
5148 | ||
b73bfc1c KH |
5149 | if (encodep && coding->dst_multibyte) |
5150 | { | |
5151 | /* The output is unibyte. We must convert 8-bit characters to | |
5152 | multibyte form. */ | |
5153 | if (inserted_byte * 2 > GAP_SIZE) | |
5154 | { | |
5155 | GAP_SIZE -= inserted_byte; | |
5156 | ZV += inserted_byte; Z += inserted_byte; | |
5157 | ZV_BYTE += inserted_byte; Z_BYTE += inserted_byte; | |
5158 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5159 | make_gap (inserted_byte - GAP_SIZE); | |
5160 | GAP_SIZE += inserted_byte; | |
5161 | ZV -= inserted_byte; Z -= inserted_byte; | |
5162 | ZV_BYTE -= inserted_byte; Z_BYTE -= inserted_byte; | |
5163 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
5164 | } | |
5165 | inserted_byte = str_to_multibyte (GPT_ADDR, GAP_SIZE, inserted_byte); | |
5166 | } | |
7553d0e1 | 5167 | |
12410ef1 KH |
5168 | /* If we have shrinked the conversion area, adjust it now. */ |
5169 | if (total_skip > 0) | |
5170 | { | |
5171 | if (tail_skip > 0) | |
5172 | safe_bcopy (GAP_END_ADDR, GPT_ADDR + inserted_byte, tail_skip); | |
5173 | inserted += total_skip; inserted_byte += total_skip; | |
5174 | GAP_SIZE += total_skip; | |
5175 | GPT -= head_skip; GPT_BYTE -= head_skip; | |
5176 | ZV -= total_skip; ZV_BYTE -= total_skip; | |
5177 | Z -= total_skip; Z_BYTE -= total_skip; | |
5178 | from -= head_skip; from_byte -= head_skip; | |
5179 | to += tail_skip; to_byte += tail_skip; | |
5180 | } | |
5181 | ||
6abb9bd9 | 5182 | prev_Z = Z; |
12410ef1 | 5183 | adjust_after_replace (from, from_byte, deletion, inserted, inserted_byte); |
6abb9bd9 | 5184 | inserted = Z - prev_Z; |
4ed46869 | 5185 | |
ec6d2bb8 KH |
5186 | if (!encodep && coding->cmp_data && coding->cmp_data->used) |
5187 | coding_restore_composition (coding, Fcurrent_buffer ()); | |
5188 | coding_free_composition_data (coding); | |
5189 | ||
b73bfc1c KH |
5190 | if (! inhibit_pre_post_conversion |
5191 | && ! encodep && ! NILP (coding->post_read_conversion)) | |
d46c5b12 | 5192 | { |
2b4f9037 | 5193 | Lisp_Object val; |
b843d1ae | 5194 | int count = specpdl_ptr - specpdl; |
4ed46869 | 5195 | |
e133c8fa KH |
5196 | if (from != PT) |
5197 | TEMP_SET_PT_BOTH (from, from_byte); | |
6abb9bd9 | 5198 | prev_Z = Z; |
b843d1ae KH |
5199 | record_unwind_protect (code_convert_region_unwind, Qnil); |
5200 | /* We should not call any more pre-write/post-read-conversion | |
5201 | functions while this post-read-conversion is running. */ | |
5202 | inhibit_pre_post_conversion = 1; | |
2b4f9037 | 5203 | val = call1 (coding->post_read_conversion, make_number (inserted)); |
b843d1ae KH |
5204 | inhibit_pre_post_conversion = 0; |
5205 | /* Discard the unwind protect. */ | |
5206 | specpdl_ptr--; | |
6abb9bd9 | 5207 | CHECK_NUMBER (val, 0); |
944bd420 | 5208 | inserted += Z - prev_Z; |
e133c8fa KH |
5209 | } |
5210 | ||
5211 | if (orig_point >= from) | |
5212 | { | |
5213 | if (orig_point >= from + orig_len) | |
5214 | orig_point += inserted - orig_len; | |
5215 | else | |
5216 | orig_point = from; | |
5217 | TEMP_SET_PT (orig_point); | |
d46c5b12 | 5218 | } |
4ed46869 | 5219 | |
ec6d2bb8 KH |
5220 | if (replace) |
5221 | { | |
5222 | signal_after_change (from, to - from, inserted); | |
e19539f1 | 5223 | update_compositions (from, from + inserted, CHECK_BORDER); |
ec6d2bb8 | 5224 | } |
2b4f9037 | 5225 | |
fb88bf2d | 5226 | { |
12410ef1 KH |
5227 | coding->consumed = to_byte - from_byte; |
5228 | coding->consumed_char = to - from; | |
5229 | coding->produced = inserted_byte; | |
5230 | coding->produced_char = inserted; | |
fb88bf2d | 5231 | } |
7553d0e1 | 5232 | |
fb88bf2d | 5233 | return 0; |
d46c5b12 KH |
5234 | } |
5235 | ||
5236 | Lisp_Object | |
b73bfc1c KH |
5237 | run_pre_post_conversion_on_str (str, coding, encodep) |
5238 | Lisp_Object str; | |
5239 | struct coding_system *coding; | |
5240 | int encodep; | |
5241 | { | |
5242 | int count = specpdl_ptr - specpdl; | |
5243 | struct gcpro gcpro1; | |
5244 | struct buffer *prev = current_buffer; | |
5245 | int multibyte = STRING_MULTIBYTE (str); | |
5246 | ||
5247 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
5248 | record_unwind_protect (code_convert_region_unwind, Qnil); | |
5249 | GCPRO1 (str); | |
5250 | temp_output_buffer_setup (" *code-converting-work*"); | |
5251 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
5252 | /* We must insert the contents of STR as is without | |
5253 | unibyte<->multibyte conversion. For that, we adjust the | |
5254 | multibyteness of the working buffer to that of STR. */ | |
5255 | Ferase_buffer (); | |
5256 | current_buffer->enable_multibyte_characters = multibyte ? Qt : Qnil; | |
5257 | insert_from_string (str, 0, 0, | |
5258 | XSTRING (str)->size, STRING_BYTES (XSTRING (str)), 0); | |
5259 | UNGCPRO; | |
5260 | inhibit_pre_post_conversion = 1; | |
5261 | if (encodep) | |
5262 | call2 (coding->pre_write_conversion, make_number (BEG), make_number (Z)); | |
5263 | else | |
6bac5b12 KH |
5264 | { |
5265 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
5266 | call1 (coding->post_read_conversion, make_number (Z - BEG)); | |
5267 | } | |
b73bfc1c | 5268 | inhibit_pre_post_conversion = 0; |
78108bcd | 5269 | str = make_buffer_string (BEG, Z, 1); |
b73bfc1c KH |
5270 | return unbind_to (count, str); |
5271 | } | |
5272 | ||
5273 | Lisp_Object | |
5274 | decode_coding_string (str, coding, nocopy) | |
d46c5b12 | 5275 | Lisp_Object str; |
4ed46869 | 5276 | struct coding_system *coding; |
b73bfc1c | 5277 | int nocopy; |
4ed46869 | 5278 | { |
d46c5b12 | 5279 | int len; |
73be902c | 5280 | struct conversion_buffer buf; |
b73bfc1c | 5281 | int from, to, to_byte; |
d46c5b12 | 5282 | struct gcpro gcpro1; |
84d60297 | 5283 | Lisp_Object saved_coding_symbol; |
d46c5b12 | 5284 | int result; |
78108bcd | 5285 | int require_decoding; |
73be902c KH |
5286 | int shrinked_bytes = 0; |
5287 | Lisp_Object newstr; | |
2391eaa4 | 5288 | int consumed, consumed_char, produced, produced_char; |
4ed46869 | 5289 | |
b73bfc1c KH |
5290 | from = 0; |
5291 | to = XSTRING (str)->size; | |
5292 | to_byte = STRING_BYTES (XSTRING (str)); | |
4ed46869 | 5293 | |
b73bfc1c KH |
5294 | saved_coding_symbol = Qnil; |
5295 | if (CODING_REQUIRE_DETECTION (coding)) | |
d46c5b12 KH |
5296 | { |
5297 | /* See the comments in code_convert_region. */ | |
5298 | if (coding->type == coding_type_undecided) | |
5299 | { | |
5300 | detect_coding (coding, XSTRING (str)->data, to_byte); | |
5301 | if (coding->type == coding_type_undecided) | |
5302 | coding->type = coding_type_emacs_mule; | |
5303 | } | |
aaaf0b1e KH |
5304 | if (coding->eol_type == CODING_EOL_UNDECIDED |
5305 | && coding->type != coding_type_ccl) | |
d46c5b12 KH |
5306 | { |
5307 | saved_coding_symbol = coding->symbol; | |
5308 | detect_eol (coding, XSTRING (str)->data, to_byte); | |
5309 | if (coding->eol_type == CODING_EOL_UNDECIDED) | |
5310 | coding->eol_type = CODING_EOL_LF; | |
5311 | /* We had better recover the original eol format if we | |
5312 | encounter an inconsitent eol format while decoding. */ | |
5313 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; | |
5314 | } | |
5315 | } | |
4ed46869 | 5316 | |
e2c06b17 KH |
5317 | coding->src_multibyte = 0; |
5318 | coding->dst_multibyte = (coding->type != coding_type_no_conversion | |
5319 | && coding->type != coding_type_raw_text); | |
78108bcd | 5320 | require_decoding = CODING_REQUIRE_DECODING (coding); |
ec6d2bb8 | 5321 | |
b73bfc1c | 5322 | if (STRING_MULTIBYTE (str)) |
d46c5b12 | 5323 | { |
b73bfc1c KH |
5324 | /* Decoding routines expect the source text to be unibyte. */ |
5325 | str = Fstring_as_unibyte (str); | |
86af83a9 | 5326 | to_byte = STRING_BYTES (XSTRING (str)); |
b73bfc1c | 5327 | nocopy = 1; |
b73bfc1c | 5328 | } |
ec6d2bb8 | 5329 | |
b73bfc1c | 5330 | /* Try to skip the heading and tailing ASCIIs. */ |
78108bcd | 5331 | if (require_decoding && coding->type != coding_type_ccl) |
4956c225 | 5332 | { |
4956c225 KH |
5333 | SHRINK_CONVERSION_REGION (&from, &to_byte, coding, XSTRING (str)->data, |
5334 | 0); | |
5335 | if (from == to_byte) | |
78108bcd | 5336 | require_decoding = 0; |
73be902c | 5337 | shrinked_bytes = from + (STRING_BYTES (XSTRING (str)) - to_byte); |
4956c225 | 5338 | } |
b73bfc1c | 5339 | |
78108bcd KH |
5340 | if (!require_decoding) |
5341 | { | |
5342 | coding->consumed = STRING_BYTES (XSTRING (str)); | |
5343 | coding->consumed_char = XSTRING (str)->size; | |
5344 | if (coding->dst_multibyte) | |
5345 | { | |
5346 | str = Fstring_as_multibyte (str); | |
5347 | nocopy = 1; | |
5348 | } | |
5349 | coding->produced = STRING_BYTES (XSTRING (str)); | |
5350 | coding->produced_char = XSTRING (str)->size; | |
5351 | return (nocopy ? str : Fcopy_sequence (str)); | |
5352 | } | |
5353 | ||
5354 | if (coding->composing != COMPOSITION_DISABLED) | |
5355 | coding_allocate_composition_data (coding, from); | |
b73bfc1c | 5356 | len = decoding_buffer_size (coding, to_byte - from); |
73be902c | 5357 | allocate_conversion_buffer (buf, len); |
4ed46869 | 5358 | |
2391eaa4 | 5359 | consumed = consumed_char = produced = produced_char = 0; |
73be902c | 5360 | while (1) |
4ed46869 | 5361 | { |
73be902c KH |
5362 | result = decode_coding (coding, XSTRING (str)->data + from + consumed, |
5363 | buf.data + produced, to_byte - from - consumed, | |
5364 | buf.size - produced); | |
5365 | consumed += coding->consumed; | |
2391eaa4 | 5366 | consumed_char += coding->consumed_char; |
73be902c KH |
5367 | produced += coding->produced; |
5368 | produced_char += coding->produced_char; | |
2391eaa4 KH |
5369 | if (result == CODING_FINISH_NORMAL |
5370 | || (result == CODING_FINISH_INSUFFICIENT_SRC | |
5371 | && coding->consumed == 0)) | |
73be902c KH |
5372 | break; |
5373 | if (result == CODING_FINISH_INSUFFICIENT_CMP) | |
5374 | coding_allocate_composition_data (coding, from + produced_char); | |
5375 | else if (result == CODING_FINISH_INSUFFICIENT_DST) | |
5376 | extend_conversion_buffer (&buf); | |
5377 | else if (result == CODING_FINISH_INCONSISTENT_EOL) | |
5378 | { | |
5379 | /* Recover the original EOL format. */ | |
5380 | if (coding->eol_type == CODING_EOL_CR) | |
5381 | { | |
5382 | unsigned char *p; | |
5383 | for (p = buf.data; p < buf.data + produced; p++) | |
5384 | if (*p == '\n') *p = '\r'; | |
5385 | } | |
5386 | else if (coding->eol_type == CODING_EOL_CRLF) | |
5387 | { | |
5388 | int num_eol = 0; | |
5389 | unsigned char *p0, *p1; | |
5390 | for (p0 = buf.data, p1 = p0 + produced; p0 < p1; p0++) | |
5391 | if (*p0 == '\n') num_eol++; | |
5392 | if (produced + num_eol >= buf.size) | |
5393 | extend_conversion_buffer (&buf); | |
5394 | for (p0 = buf.data + produced, p1 = p0 + num_eol; p0 > buf.data;) | |
5395 | { | |
5396 | *--p1 = *--p0; | |
5397 | if (*p0 == '\n') *--p1 = '\r'; | |
5398 | } | |
5399 | produced += num_eol; | |
5400 | produced_char += num_eol; | |
5401 | } | |
5402 | coding->eol_type = CODING_EOL_LF; | |
5403 | coding->symbol = saved_coding_symbol; | |
5404 | } | |
4ed46869 | 5405 | } |
d46c5b12 | 5406 | |
2391eaa4 KH |
5407 | coding->consumed = consumed; |
5408 | coding->consumed_char = consumed_char; | |
5409 | coding->produced = produced; | |
5410 | coding->produced_char = produced_char; | |
5411 | ||
78108bcd | 5412 | if (coding->dst_multibyte) |
73be902c KH |
5413 | newstr = make_uninit_multibyte_string (produced_char + shrinked_bytes, |
5414 | produced + shrinked_bytes); | |
78108bcd | 5415 | else |
73be902c KH |
5416 | newstr = make_uninit_string (produced + shrinked_bytes); |
5417 | if (from > 0) | |
5418 | bcopy (XSTRING (str)->data, XSTRING (newstr)->data, from); | |
5419 | bcopy (buf.data, XSTRING (newstr)->data + from, produced); | |
5420 | if (shrinked_bytes > from) | |
5421 | bcopy (XSTRING (str)->data + to_byte, | |
5422 | XSTRING (newstr)->data + from + produced, | |
5423 | shrinked_bytes - from); | |
5424 | free_conversion_buffer (&buf); | |
b73bfc1c KH |
5425 | |
5426 | if (coding->cmp_data && coding->cmp_data->used) | |
73be902c | 5427 | coding_restore_composition (coding, newstr); |
b73bfc1c KH |
5428 | coding_free_composition_data (coding); |
5429 | ||
5430 | if (SYMBOLP (coding->post_read_conversion) | |
5431 | && !NILP (Ffboundp (coding->post_read_conversion))) | |
73be902c | 5432 | newstr = run_pre_post_conversion_on_str (newstr, coding, 0); |
b73bfc1c | 5433 | |
73be902c | 5434 | return newstr; |
b73bfc1c KH |
5435 | } |
5436 | ||
5437 | Lisp_Object | |
5438 | encode_coding_string (str, coding, nocopy) | |
5439 | Lisp_Object str; | |
5440 | struct coding_system *coding; | |
5441 | int nocopy; | |
5442 | { | |
5443 | int len; | |
73be902c | 5444 | struct conversion_buffer buf; |
b73bfc1c KH |
5445 | int from, to, to_byte; |
5446 | struct gcpro gcpro1; | |
5447 | Lisp_Object saved_coding_symbol; | |
5448 | int result; | |
73be902c KH |
5449 | int shrinked_bytes = 0; |
5450 | Lisp_Object newstr; | |
2391eaa4 | 5451 | int consumed, consumed_char, produced, produced_char; |
b73bfc1c KH |
5452 | |
5453 | if (SYMBOLP (coding->pre_write_conversion) | |
5454 | && !NILP (Ffboundp (coding->pre_write_conversion))) | |
6bac5b12 | 5455 | str = run_pre_post_conversion_on_str (str, coding, 1); |
b73bfc1c KH |
5456 | |
5457 | from = 0; | |
5458 | to = XSTRING (str)->size; | |
5459 | to_byte = STRING_BYTES (XSTRING (str)); | |
5460 | ||
5461 | saved_coding_symbol = Qnil; | |
e2c06b17 KH |
5462 | |
5463 | /* Encoding routines determine the multibyteness of the source text | |
5464 | by coding->src_multibyte. */ | |
5465 | coding->src_multibyte = STRING_MULTIBYTE (str); | |
5466 | coding->dst_multibyte = 0; | |
b73bfc1c | 5467 | if (! CODING_REQUIRE_ENCODING (coding)) |
826bfb8b | 5468 | { |
2391eaa4 KH |
5469 | coding->consumed = STRING_BYTES (XSTRING (str)); |
5470 | coding->consumed_char = XSTRING (str)->size; | |
b73bfc1c KH |
5471 | if (STRING_MULTIBYTE (str)) |
5472 | { | |
5473 | str = Fstring_as_unibyte (str); | |
5474 | nocopy = 1; | |
5475 | } | |
2391eaa4 KH |
5476 | coding->produced = STRING_BYTES (XSTRING (str)); |
5477 | coding->produced_char = XSTRING (str)->size; | |
b73bfc1c | 5478 | return (nocopy ? str : Fcopy_sequence (str)); |
826bfb8b KH |
5479 | } |
5480 | ||
b73bfc1c KH |
5481 | if (coding->composing != COMPOSITION_DISABLED) |
5482 | coding_save_composition (coding, from, to, str); | |
ec6d2bb8 | 5483 | |
b73bfc1c | 5484 | /* Try to skip the heading and tailing ASCIIs. */ |
4956c225 KH |
5485 | if (coding->type != coding_type_ccl) |
5486 | { | |
4956c225 KH |
5487 | SHRINK_CONVERSION_REGION (&from, &to_byte, coding, XSTRING (str)->data, |
5488 | 1); | |
5489 | if (from == to_byte) | |
5490 | return (nocopy ? str : Fcopy_sequence (str)); | |
73be902c | 5491 | shrinked_bytes = from + (STRING_BYTES (XSTRING (str)) - to_byte); |
4956c225 | 5492 | } |
b73bfc1c KH |
5493 | |
5494 | len = encoding_buffer_size (coding, to_byte - from); | |
73be902c KH |
5495 | allocate_conversion_buffer (buf, len); |
5496 | ||
2391eaa4 | 5497 | consumed = consumed_char = produced = produced_char = 0; |
73be902c KH |
5498 | while (1) |
5499 | { | |
5500 | result = encode_coding (coding, XSTRING (str)->data + from + consumed, | |
5501 | buf.data + produced, to_byte - from - consumed, | |
5502 | buf.size - produced); | |
5503 | consumed += coding->consumed; | |
2391eaa4 | 5504 | consumed_char += coding->consumed_char; |
13004bef | 5505 | produced += coding->produced; |
2391eaa4 KH |
5506 | produced_char += coding->produced_char; |
5507 | if (result == CODING_FINISH_NORMAL | |
5508 | || (result == CODING_FINISH_INSUFFICIENT_SRC | |
5509 | && coding->consumed == 0)) | |
73be902c KH |
5510 | break; |
5511 | /* Now result should be CODING_FINISH_INSUFFICIENT_DST. */ | |
5512 | extend_conversion_buffer (&buf); | |
5513 | } | |
5514 | ||
2391eaa4 KH |
5515 | coding->consumed = consumed; |
5516 | coding->consumed_char = consumed_char; | |
5517 | coding->produced = produced; | |
5518 | coding->produced_char = produced_char; | |
5519 | ||
73be902c | 5520 | newstr = make_uninit_string (produced + shrinked_bytes); |
b73bfc1c | 5521 | if (from > 0) |
73be902c KH |
5522 | bcopy (XSTRING (str)->data, XSTRING (newstr)->data, from); |
5523 | bcopy (buf.data, XSTRING (newstr)->data + from, produced); | |
5524 | if (shrinked_bytes > from) | |
5525 | bcopy (XSTRING (str)->data + to_byte, | |
5526 | XSTRING (newstr)->data + from + produced, | |
5527 | shrinked_bytes - from); | |
5528 | ||
5529 | free_conversion_buffer (&buf); | |
ec6d2bb8 | 5530 | coding_free_composition_data (coding); |
b73bfc1c | 5531 | |
73be902c | 5532 | return newstr; |
4ed46869 KH |
5533 | } |
5534 | ||
5535 | \f | |
5536 | #ifdef emacs | |
1397dc18 | 5537 | /*** 8. Emacs Lisp library functions ***/ |
4ed46869 | 5538 | |
4ed46869 KH |
5539 | DEFUN ("coding-system-p", Fcoding_system_p, Scoding_system_p, 1, 1, 0, |
5540 | "Return t if OBJECT is nil or a coding-system.\n\ | |
3a73fa5d RS |
5541 | See the documentation of `make-coding-system' for information\n\ |
5542 | about coding-system objects.") | |
4ed46869 KH |
5543 | (obj) |
5544 | Lisp_Object obj; | |
5545 | { | |
4608c386 KH |
5546 | if (NILP (obj)) |
5547 | return Qt; | |
5548 | if (!SYMBOLP (obj)) | |
5549 | return Qnil; | |
5550 | /* Get coding-spec vector for OBJ. */ | |
5551 | obj = Fget (obj, Qcoding_system); | |
5552 | return ((VECTORP (obj) && XVECTOR (obj)->size == 5) | |
5553 | ? Qt : Qnil); | |
4ed46869 KH |
5554 | } |
5555 | ||
9d991de8 RS |
5556 | DEFUN ("read-non-nil-coding-system", Fread_non_nil_coding_system, |
5557 | Sread_non_nil_coding_system, 1, 1, 0, | |
e0e989f6 | 5558 | "Read a coding system from the minibuffer, prompting with string PROMPT.") |
4ed46869 KH |
5559 | (prompt) |
5560 | Lisp_Object prompt; | |
5561 | { | |
e0e989f6 | 5562 | Lisp_Object val; |
9d991de8 RS |
5563 | do |
5564 | { | |
4608c386 KH |
5565 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
5566 | Qt, Qnil, Qcoding_system_history, Qnil, Qnil); | |
9d991de8 RS |
5567 | } |
5568 | while (XSTRING (val)->size == 0); | |
e0e989f6 | 5569 | return (Fintern (val, Qnil)); |
4ed46869 KH |
5570 | } |
5571 | ||
9b787f3e RS |
5572 | DEFUN ("read-coding-system", Fread_coding_system, Sread_coding_system, 1, 2, 0, |
5573 | "Read a coding system from the minibuffer, prompting with string PROMPT.\n\ | |
5574 | If the user enters null input, return second argument DEFAULT-CODING-SYSTEM.") | |
5575 | (prompt, default_coding_system) | |
5576 | Lisp_Object prompt, default_coding_system; | |
4ed46869 | 5577 | { |
f44d27ce | 5578 | Lisp_Object val; |
9b787f3e RS |
5579 | if (SYMBOLP (default_coding_system)) |
5580 | XSETSTRING (default_coding_system, XSYMBOL (default_coding_system)->name); | |
4608c386 | 5581 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
9b787f3e RS |
5582 | Qt, Qnil, Qcoding_system_history, |
5583 | default_coding_system, Qnil); | |
e0e989f6 | 5584 | return (XSTRING (val)->size == 0 ? Qnil : Fintern (val, Qnil)); |
4ed46869 KH |
5585 | } |
5586 | ||
5587 | DEFUN ("check-coding-system", Fcheck_coding_system, Scheck_coding_system, | |
5588 | 1, 1, 0, | |
5589 | "Check validity of CODING-SYSTEM.\n\ | |
3a73fa5d RS |
5590 | If valid, return CODING-SYSTEM, else signal a `coding-system-error' error.\n\ |
5591 | It is valid if it is a symbol with a non-nil `coding-system' property.\n\ | |
4ed46869 KH |
5592 | The value of property should be a vector of length 5.") |
5593 | (coding_system) | |
5594 | Lisp_Object coding_system; | |
5595 | { | |
5596 | CHECK_SYMBOL (coding_system, 0); | |
5597 | if (!NILP (Fcoding_system_p (coding_system))) | |
5598 | return coding_system; | |
5599 | while (1) | |
02ba4723 | 5600 | Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil)); |
4ed46869 | 5601 | } |
3a73fa5d | 5602 | \f |
d46c5b12 KH |
5603 | Lisp_Object |
5604 | detect_coding_system (src, src_bytes, highest) | |
5605 | unsigned char *src; | |
5606 | int src_bytes, highest; | |
4ed46869 KH |
5607 | { |
5608 | int coding_mask, eol_type; | |
d46c5b12 KH |
5609 | Lisp_Object val, tmp; |
5610 | int dummy; | |
4ed46869 | 5611 | |
d46c5b12 KH |
5612 | coding_mask = detect_coding_mask (src, src_bytes, NULL, &dummy); |
5613 | eol_type = detect_eol_type (src, src_bytes, &dummy); | |
5614 | if (eol_type == CODING_EOL_INCONSISTENT) | |
25b02698 | 5615 | eol_type = CODING_EOL_UNDECIDED; |
4ed46869 | 5616 | |
d46c5b12 | 5617 | if (!coding_mask) |
4ed46869 | 5618 | { |
27901516 | 5619 | val = Qundecided; |
d46c5b12 | 5620 | if (eol_type != CODING_EOL_UNDECIDED) |
4ed46869 | 5621 | { |
f44d27ce RS |
5622 | Lisp_Object val2; |
5623 | val2 = Fget (Qundecided, Qeol_type); | |
4ed46869 KH |
5624 | if (VECTORP (val2)) |
5625 | val = XVECTOR (val2)->contents[eol_type]; | |
5626 | } | |
80e803b4 | 5627 | return (highest ? val : Fcons (val, Qnil)); |
4ed46869 | 5628 | } |
4ed46869 | 5629 | |
d46c5b12 KH |
5630 | /* At first, gather possible coding systems in VAL. */ |
5631 | val = Qnil; | |
fa42c37f | 5632 | for (tmp = Vcoding_category_list; CONSP (tmp); tmp = XCDR (tmp)) |
4ed46869 | 5633 | { |
fa42c37f KH |
5634 | Lisp_Object category_val, category_index; |
5635 | ||
5636 | category_index = Fget (XCAR (tmp), Qcoding_category_index); | |
5637 | category_val = Fsymbol_value (XCAR (tmp)); | |
5638 | if (!NILP (category_val) | |
5639 | && NATNUMP (category_index) | |
5640 | && (coding_mask & (1 << XFASTINT (category_index)))) | |
4ed46869 | 5641 | { |
fa42c37f | 5642 | val = Fcons (category_val, val); |
d46c5b12 KH |
5643 | if (highest) |
5644 | break; | |
4ed46869 KH |
5645 | } |
5646 | } | |
d46c5b12 KH |
5647 | if (!highest) |
5648 | val = Fnreverse (val); | |
4ed46869 | 5649 | |
65059037 | 5650 | /* Then, replace the elements with subsidiary coding systems. */ |
fa42c37f | 5651 | for (tmp = val; CONSP (tmp); tmp = XCDR (tmp)) |
4ed46869 | 5652 | { |
65059037 RS |
5653 | if (eol_type != CODING_EOL_UNDECIDED |
5654 | && eol_type != CODING_EOL_INCONSISTENT) | |
4ed46869 | 5655 | { |
d46c5b12 | 5656 | Lisp_Object eol; |
03699b14 | 5657 | eol = Fget (XCAR (tmp), Qeol_type); |
d46c5b12 | 5658 | if (VECTORP (eol)) |
03699b14 | 5659 | XCAR (tmp) = XVECTOR (eol)->contents[eol_type]; |
4ed46869 KH |
5660 | } |
5661 | } | |
03699b14 | 5662 | return (highest ? XCAR (val) : val); |
d46c5b12 | 5663 | } |
4ed46869 | 5664 | |
d46c5b12 KH |
5665 | DEFUN ("detect-coding-region", Fdetect_coding_region, Sdetect_coding_region, |
5666 | 2, 3, 0, | |
5667 | "Detect coding system of the text in the region between START and END.\n\ | |
5668 | Return a list of possible coding systems ordered by priority.\n\ | |
5669 | \n\ | |
80e803b4 KH |
5670 | If only ASCII characters are found, it returns a list of single element\n\ |
5671 | `undecided' or its subsidiary coding system according to a detected\n\ | |
5672 | end-of-line format.\n\ | |
d46c5b12 KH |
5673 | \n\ |
5674 | If optional argument HIGHEST is non-nil, return the coding system of\n\ | |
5675 | highest priority.") | |
5676 | (start, end, highest) | |
5677 | Lisp_Object start, end, highest; | |
5678 | { | |
5679 | int from, to; | |
5680 | int from_byte, to_byte; | |
6289dd10 | 5681 | |
d46c5b12 KH |
5682 | CHECK_NUMBER_COERCE_MARKER (start, 0); |
5683 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
4ed46869 | 5684 | |
d46c5b12 KH |
5685 | validate_region (&start, &end); |
5686 | from = XINT (start), to = XINT (end); | |
5687 | from_byte = CHAR_TO_BYTE (from); | |
5688 | to_byte = CHAR_TO_BYTE (to); | |
6289dd10 | 5689 | |
d46c5b12 KH |
5690 | if (from < GPT && to >= GPT) |
5691 | move_gap_both (to, to_byte); | |
4ed46869 | 5692 | |
d46c5b12 KH |
5693 | return detect_coding_system (BYTE_POS_ADDR (from_byte), |
5694 | to_byte - from_byte, | |
5695 | !NILP (highest)); | |
5696 | } | |
6289dd10 | 5697 | |
d46c5b12 KH |
5698 | DEFUN ("detect-coding-string", Fdetect_coding_string, Sdetect_coding_string, |
5699 | 1, 2, 0, | |
5700 | "Detect coding system of the text in STRING.\n\ | |
5701 | Return a list of possible coding systems ordered by priority.\n\ | |
5702 | \n\ | |
80e803b4 KH |
5703 | If only ASCII characters are found, it returns a list of single element\n\ |
5704 | `undecided' or its subsidiary coding system according to a detected\n\ | |
5705 | end-of-line format.\n\ | |
d46c5b12 KH |
5706 | \n\ |
5707 | If optional argument HIGHEST is non-nil, return the coding system of\n\ | |
5708 | highest priority.") | |
5709 | (string, highest) | |
5710 | Lisp_Object string, highest; | |
5711 | { | |
5712 | CHECK_STRING (string, 0); | |
4ed46869 | 5713 | |
d46c5b12 | 5714 | return detect_coding_system (XSTRING (string)->data, |
fc932ac6 | 5715 | STRING_BYTES (XSTRING (string)), |
d46c5b12 | 5716 | !NILP (highest)); |
4ed46869 KH |
5717 | } |
5718 | ||
05e6f5dc KH |
5719 | /* Return an intersection of lists L1 and L2. */ |
5720 | ||
5721 | static Lisp_Object | |
5722 | intersection (l1, l2) | |
5723 | Lisp_Object l1, l2; | |
5724 | { | |
5725 | Lisp_Object val; | |
5726 | ||
5727 | for (val = Qnil; CONSP (l1); l1 = XCDR (l1)) | |
5728 | { | |
5729 | if (!NILP (Fmemq (XCAR (l1), l2))) | |
5730 | val = Fcons (XCAR (l1), val); | |
5731 | } | |
5732 | return val; | |
5733 | } | |
5734 | ||
5735 | ||
5736 | /* Subroutine for Fsafe_coding_systems_region_internal. | |
5737 | ||
5738 | Return a list of coding systems that safely encode the multibyte | |
5739 | text between P and PEND. SAFE_CODINGS, if non-nil, is a list of | |
5740 | possible coding systems. If it is nil, it means that we have not | |
5741 | yet found any coding systems. | |
5742 | ||
5743 | WORK_TABLE is a copy of the char-table Vchar_coding_system_table. An | |
5744 | element of WORK_TABLE is set to t once the element is looked up. | |
5745 | ||
5746 | If a non-ASCII single byte char is found, set | |
5747 | *single_byte_char_found to 1. */ | |
5748 | ||
5749 | static Lisp_Object | |
5750 | find_safe_codings (p, pend, safe_codings, work_table, single_byte_char_found) | |
5751 | unsigned char *p, *pend; | |
5752 | Lisp_Object safe_codings, work_table; | |
5753 | int *single_byte_char_found; | |
5754 | { | |
5755 | int c, len, idx; | |
5756 | Lisp_Object val; | |
5757 | ||
5758 | while (p < pend) | |
5759 | { | |
5760 | c = STRING_CHAR_AND_LENGTH (p, pend - p, len); | |
5761 | p += len; | |
5762 | if (ASCII_BYTE_P (c)) | |
5763 | /* We can ignore ASCII characters here. */ | |
5764 | continue; | |
5765 | if (SINGLE_BYTE_CHAR_P (c)) | |
5766 | *single_byte_char_found = 1; | |
5767 | if (NILP (safe_codings)) | |
5768 | continue; | |
5769 | /* Check the safe coding systems for C. */ | |
5770 | val = char_table_ref_and_index (work_table, c, &idx); | |
5771 | if (EQ (val, Qt)) | |
5772 | /* This element was already checked. Ignore it. */ | |
5773 | continue; | |
5774 | /* Remember that we checked this element. */ | |
975f250a | 5775 | CHAR_TABLE_SET (work_table, make_number (idx), Qt); |
05e6f5dc KH |
5776 | |
5777 | /* If there are some safe coding systems for C and we have | |
5778 | already found the other set of coding systems for the | |
5779 | different characters, get the intersection of them. */ | |
5780 | if (!EQ (safe_codings, Qt) && !NILP (val)) | |
5781 | val = intersection (safe_codings, val); | |
5782 | safe_codings = val; | |
5783 | } | |
5784 | return safe_codings; | |
5785 | } | |
5786 | ||
5787 | ||
5788 | /* Return a list of coding systems that safely encode the text between | |
5789 | START and END. If the text contains only ASCII or is unibyte, | |
5790 | return t. */ | |
5791 | ||
5792 | DEFUN ("find-coding-systems-region-internal", | |
5793 | Ffind_coding_systems_region_internal, | |
5794 | Sfind_coding_systems_region_internal, 2, 2, 0, | |
5795 | "Internal use only.") | |
5796 | (start, end) | |
5797 | Lisp_Object start, end; | |
5798 | { | |
5799 | Lisp_Object work_table, safe_codings; | |
5800 | int non_ascii_p = 0; | |
5801 | int single_byte_char_found = 0; | |
5802 | unsigned char *p1, *p1end, *p2, *p2end, *p; | |
5803 | Lisp_Object args[2]; | |
5804 | ||
5805 | if (STRINGP (start)) | |
5806 | { | |
5807 | if (!STRING_MULTIBYTE (start)) | |
5808 | return Qt; | |
5809 | p1 = XSTRING (start)->data, p1end = p1 + STRING_BYTES (XSTRING (start)); | |
5810 | p2 = p2end = p1end; | |
5811 | if (XSTRING (start)->size != STRING_BYTES (XSTRING (start))) | |
5812 | non_ascii_p = 1; | |
5813 | } | |
5814 | else | |
5815 | { | |
5816 | int from, to, stop; | |
5817 | ||
5818 | CHECK_NUMBER_COERCE_MARKER (start, 0); | |
5819 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5820 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) | |
5821 | args_out_of_range (start, end); | |
5822 | if (NILP (current_buffer->enable_multibyte_characters)) | |
5823 | return Qt; | |
5824 | from = CHAR_TO_BYTE (XINT (start)); | |
5825 | to = CHAR_TO_BYTE (XINT (end)); | |
5826 | stop = from < GPT_BYTE && GPT_BYTE < to ? GPT_BYTE : to; | |
5827 | p1 = BYTE_POS_ADDR (from), p1end = p1 + (stop - from); | |
5828 | if (stop == to) | |
5829 | p2 = p2end = p1end; | |
5830 | else | |
5831 | p2 = BYTE_POS_ADDR (stop), p2end = p2 + (to - stop); | |
5832 | if (XINT (end) - XINT (start) != to - from) | |
5833 | non_ascii_p = 1; | |
5834 | } | |
5835 | ||
5836 | if (!non_ascii_p) | |
5837 | { | |
5838 | /* We are sure that the text contains no multibyte character. | |
5839 | Check if it contains eight-bit-graphic. */ | |
5840 | p = p1; | |
5841 | for (p = p1; p < p1end && ASCII_BYTE_P (*p); p++); | |
5842 | if (p == p1end) | |
5843 | { | |
5844 | for (p = p2; p < p2end && ASCII_BYTE_P (*p); p++); | |
5845 | if (p == p2end) | |
5846 | return Qt; | |
5847 | } | |
5848 | } | |
5849 | ||
5850 | /* The text contains non-ASCII characters. */ | |
5851 | work_table = Fcopy_sequence (Vchar_coding_system_table); | |
5852 | safe_codings = find_safe_codings (p1, p1end, Qt, work_table, | |
5853 | &single_byte_char_found); | |
5854 | if (p2 < p2end) | |
5855 | safe_codings = find_safe_codings (p2, p2end, safe_codings, work_table, | |
5856 | &single_byte_char_found); | |
5857 | ||
5858 | if (!single_byte_char_found) | |
5859 | { | |
5860 | /* Append generic coding systems. */ | |
5861 | Lisp_Object args[2]; | |
5862 | args[0] = safe_codings; | |
5863 | args[1] = Fchar_table_extra_slot (Vchar_coding_system_table, | |
5864 | make_number (0)); | |
975f250a | 5865 | safe_codings = Fappend (2, args); |
05e6f5dc KH |
5866 | } |
5867 | else | |
5868 | safe_codings = Fcons (Qraw_text, Fcons (Qemacs_mule, safe_codings)); | |
5869 | return safe_codings; | |
5870 | } | |
5871 | ||
5872 | ||
4031e2bf KH |
5873 | Lisp_Object |
5874 | code_convert_region1 (start, end, coding_system, encodep) | |
d46c5b12 | 5875 | Lisp_Object start, end, coding_system; |
4031e2bf | 5876 | int encodep; |
3a73fa5d RS |
5877 | { |
5878 | struct coding_system coding; | |
4031e2bf | 5879 | int from, to, len; |
3a73fa5d | 5880 | |
d46c5b12 KH |
5881 | CHECK_NUMBER_COERCE_MARKER (start, 0); |
5882 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
3a73fa5d RS |
5883 | CHECK_SYMBOL (coding_system, 2); |
5884 | ||
d46c5b12 KH |
5885 | validate_region (&start, &end); |
5886 | from = XFASTINT (start); | |
5887 | to = XFASTINT (end); | |
5888 | ||
3a73fa5d | 5889 | if (NILP (coding_system)) |
d46c5b12 KH |
5890 | return make_number (to - from); |
5891 | ||
3a73fa5d | 5892 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) |
d46c5b12 | 5893 | error ("Invalid coding system: %s", XSYMBOL (coding_system)->name->data); |
3a73fa5d | 5894 | |
d46c5b12 | 5895 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
5896 | coding.src_multibyte = coding.dst_multibyte |
5897 | = !NILP (current_buffer->enable_multibyte_characters); | |
fb88bf2d KH |
5898 | code_convert_region (from, CHAR_TO_BYTE (from), to, CHAR_TO_BYTE (to), |
5899 | &coding, encodep, 1); | |
f072a3e8 | 5900 | Vlast_coding_system_used = coding.symbol; |
fb88bf2d | 5901 | return make_number (coding.produced_char); |
4031e2bf KH |
5902 | } |
5903 | ||
5904 | DEFUN ("decode-coding-region", Fdecode_coding_region, Sdecode_coding_region, | |
5905 | 3, 3, "r\nzCoding system: ", | |
5906 | "Decode the current region by specified coding system.\n\ | |
5907 | When called from a program, takes three arguments:\n\ | |
5908 | START, END, and CODING-SYSTEM. START and END are buffer positions.\n\ | |
f072a3e8 RS |
5909 | This function sets `last-coding-system-used' to the precise coding system\n\ |
5910 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is\n\ | |
5911 | not fully specified.)\n\ | |
5912 | It returns the length of the decoded text.") | |
4031e2bf KH |
5913 | (start, end, coding_system) |
5914 | Lisp_Object start, end, coding_system; | |
5915 | { | |
5916 | return code_convert_region1 (start, end, coding_system, 0); | |
3a73fa5d RS |
5917 | } |
5918 | ||
5919 | DEFUN ("encode-coding-region", Fencode_coding_region, Sencode_coding_region, | |
5920 | 3, 3, "r\nzCoding system: ", | |
d46c5b12 | 5921 | "Encode the current region by specified coding system.\n\ |
3a73fa5d | 5922 | When called from a program, takes three arguments:\n\ |
d46c5b12 | 5923 | START, END, and CODING-SYSTEM. START and END are buffer positions.\n\ |
f072a3e8 RS |
5924 | This function sets `last-coding-system-used' to the precise coding system\n\ |
5925 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is\n\ | |
5926 | not fully specified.)\n\ | |
5927 | It returns the length of the encoded text.") | |
d46c5b12 KH |
5928 | (start, end, coding_system) |
5929 | Lisp_Object start, end, coding_system; | |
3a73fa5d | 5930 | { |
4031e2bf KH |
5931 | return code_convert_region1 (start, end, coding_system, 1); |
5932 | } | |
3a73fa5d | 5933 | |
4031e2bf KH |
5934 | Lisp_Object |
5935 | code_convert_string1 (string, coding_system, nocopy, encodep) | |
5936 | Lisp_Object string, coding_system, nocopy; | |
5937 | int encodep; | |
5938 | { | |
5939 | struct coding_system coding; | |
3a73fa5d | 5940 | |
4031e2bf KH |
5941 | CHECK_STRING (string, 0); |
5942 | CHECK_SYMBOL (coding_system, 1); | |
4ed46869 | 5943 | |
d46c5b12 | 5944 | if (NILP (coding_system)) |
4031e2bf | 5945 | return (NILP (nocopy) ? Fcopy_sequence (string) : string); |
4ed46869 | 5946 | |
d46c5b12 KH |
5947 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) |
5948 | error ("Invalid coding system: %s", XSYMBOL (coding_system)->name->data); | |
5f1cd180 | 5949 | |
d46c5b12 | 5950 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
5951 | string = (encodep |
5952 | ? encode_coding_string (string, &coding, !NILP (nocopy)) | |
5953 | : decode_coding_string (string, &coding, !NILP (nocopy))); | |
f072a3e8 | 5954 | Vlast_coding_system_used = coding.symbol; |
ec6d2bb8 KH |
5955 | |
5956 | return string; | |
4ed46869 KH |
5957 | } |
5958 | ||
4ed46869 | 5959 | DEFUN ("decode-coding-string", Fdecode_coding_string, Sdecode_coding_string, |
e0e989f6 KH |
5960 | 2, 3, 0, |
5961 | "Decode STRING which is encoded in CODING-SYSTEM, and return the result.\n\ | |
fe487a71 | 5962 | Optional arg NOCOPY non-nil means it is ok to return STRING itself\n\ |
f072a3e8 RS |
5963 | if the decoding operation is trivial.\n\ |
5964 | This function sets `last-coding-system-used' to the precise coding system\n\ | |
5965 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is\n\ | |
5966 | not fully specified.)") | |
e0e989f6 KH |
5967 | (string, coding_system, nocopy) |
5968 | Lisp_Object string, coding_system, nocopy; | |
4ed46869 | 5969 | { |
f072a3e8 | 5970 | return code_convert_string1 (string, coding_system, nocopy, 0); |
4ed46869 KH |
5971 | } |
5972 | ||
5973 | DEFUN ("encode-coding-string", Fencode_coding_string, Sencode_coding_string, | |
e0e989f6 KH |
5974 | 2, 3, 0, |
5975 | "Encode STRING to CODING-SYSTEM, and return the result.\n\ | |
fe487a71 | 5976 | Optional arg NOCOPY non-nil means it is ok to return STRING itself\n\ |
f072a3e8 RS |
5977 | if the encoding operation is trivial.\n\ |
5978 | This function sets `last-coding-system-used' to the precise coding system\n\ | |
5979 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is\n\ | |
5980 | not fully specified.)") | |
e0e989f6 KH |
5981 | (string, coding_system, nocopy) |
5982 | Lisp_Object string, coding_system, nocopy; | |
4ed46869 | 5983 | { |
f072a3e8 | 5984 | return code_convert_string1 (string, coding_system, nocopy, 1); |
4ed46869 | 5985 | } |
4031e2bf | 5986 | |
ecec61c1 | 5987 | /* Encode or decode STRING according to CODING_SYSTEM. |
ec6d2bb8 KH |
5988 | Do not set Vlast_coding_system_used. |
5989 | ||
5990 | This function is called only from macros DECODE_FILE and | |
5991 | ENCODE_FILE, thus we ignore character composition. */ | |
ecec61c1 KH |
5992 | |
5993 | Lisp_Object | |
5994 | code_convert_string_norecord (string, coding_system, encodep) | |
5995 | Lisp_Object string, coding_system; | |
5996 | int encodep; | |
5997 | { | |
5998 | struct coding_system coding; | |
5999 | ||
6000 | CHECK_STRING (string, 0); | |
6001 | CHECK_SYMBOL (coding_system, 1); | |
6002 | ||
6003 | if (NILP (coding_system)) | |
6004 | return string; | |
6005 | ||
6006 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) | |
6007 | error ("Invalid coding system: %s", XSYMBOL (coding_system)->name->data); | |
6008 | ||
ec6d2bb8 | 6009 | coding.composing = COMPOSITION_DISABLED; |
ecec61c1 | 6010 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
6011 | return (encodep |
6012 | ? encode_coding_string (string, &coding, 1) | |
6013 | : decode_coding_string (string, &coding, 1)); | |
ecec61c1 | 6014 | } |
3a73fa5d | 6015 | \f |
4ed46869 | 6016 | DEFUN ("decode-sjis-char", Fdecode_sjis_char, Sdecode_sjis_char, 1, 1, 0, |
55ab7be3 | 6017 | "Decode a Japanese character which has CODE in shift_jis encoding.\n\ |
4ed46869 KH |
6018 | Return the corresponding character.") |
6019 | (code) | |
6020 | Lisp_Object code; | |
6021 | { | |
6022 | unsigned char c1, c2, s1, s2; | |
6023 | Lisp_Object val; | |
6024 | ||
6025 | CHECK_NUMBER (code, 0); | |
6026 | s1 = (XFASTINT (code)) >> 8, s2 = (XFASTINT (code)) & 0xFF; | |
55ab7be3 KH |
6027 | if (s1 == 0) |
6028 | { | |
c28a9453 KH |
6029 | if (s2 < 0x80) |
6030 | XSETFASTINT (val, s2); | |
6031 | else if (s2 >= 0xA0 || s2 <= 0xDF) | |
b73bfc1c | 6032 | XSETFASTINT (val, MAKE_CHAR (charset_katakana_jisx0201, s2, 0)); |
c28a9453 | 6033 | else |
9da8350f | 6034 | error ("Invalid Shift JIS code: %x", XFASTINT (code)); |
55ab7be3 KH |
6035 | } |
6036 | else | |
6037 | { | |
6038 | if ((s1 < 0x80 || s1 > 0x9F && s1 < 0xE0 || s1 > 0xEF) | |
6039 | || (s2 < 0x40 || s2 == 0x7F || s2 > 0xFC)) | |
9da8350f | 6040 | error ("Invalid Shift JIS code: %x", XFASTINT (code)); |
55ab7be3 | 6041 | DECODE_SJIS (s1, s2, c1, c2); |
b73bfc1c | 6042 | XSETFASTINT (val, MAKE_CHAR (charset_jisx0208, c1, c2)); |
55ab7be3 | 6043 | } |
4ed46869 KH |
6044 | return val; |
6045 | } | |
6046 | ||
6047 | DEFUN ("encode-sjis-char", Fencode_sjis_char, Sencode_sjis_char, 1, 1, 0, | |
55ab7be3 KH |
6048 | "Encode a Japanese character CHAR to shift_jis encoding.\n\ |
6049 | Return the corresponding code in SJIS.") | |
4ed46869 KH |
6050 | (ch) |
6051 | Lisp_Object ch; | |
6052 | { | |
bcf26d6a | 6053 | int charset, c1, c2, s1, s2; |
4ed46869 KH |
6054 | Lisp_Object val; |
6055 | ||
6056 | CHECK_NUMBER (ch, 0); | |
6057 | SPLIT_CHAR (XFASTINT (ch), charset, c1, c2); | |
c28a9453 KH |
6058 | if (charset == CHARSET_ASCII) |
6059 | { | |
6060 | val = ch; | |
6061 | } | |
6062 | else if (charset == charset_jisx0208 | |
6063 | && c1 > 0x20 && c1 < 0x7F && c2 > 0x20 && c2 < 0x7F) | |
4ed46869 KH |
6064 | { |
6065 | ENCODE_SJIS (c1, c2, s1, s2); | |
bcf26d6a | 6066 | XSETFASTINT (val, (s1 << 8) | s2); |
4ed46869 | 6067 | } |
55ab7be3 KH |
6068 | else if (charset == charset_katakana_jisx0201 |
6069 | && c1 > 0x20 && c2 < 0xE0) | |
6070 | { | |
6071 | XSETFASTINT (val, c1 | 0x80); | |
6072 | } | |
4ed46869 | 6073 | else |
55ab7be3 | 6074 | error ("Can't encode to shift_jis: %d", XFASTINT (ch)); |
4ed46869 KH |
6075 | return val; |
6076 | } | |
6077 | ||
6078 | DEFUN ("decode-big5-char", Fdecode_big5_char, Sdecode_big5_char, 1, 1, 0, | |
c28a9453 | 6079 | "Decode a Big5 character which has CODE in BIG5 coding system.\n\ |
4ed46869 KH |
6080 | Return the corresponding character.") |
6081 | (code) | |
6082 | Lisp_Object code; | |
6083 | { | |
6084 | int charset; | |
6085 | unsigned char b1, b2, c1, c2; | |
6086 | Lisp_Object val; | |
6087 | ||
6088 | CHECK_NUMBER (code, 0); | |
6089 | b1 = (XFASTINT (code)) >> 8, b2 = (XFASTINT (code)) & 0xFF; | |
c28a9453 KH |
6090 | if (b1 == 0) |
6091 | { | |
6092 | if (b2 >= 0x80) | |
9da8350f | 6093 | error ("Invalid BIG5 code: %x", XFASTINT (code)); |
c28a9453 KH |
6094 | val = code; |
6095 | } | |
6096 | else | |
6097 | { | |
6098 | if ((b1 < 0xA1 || b1 > 0xFE) | |
6099 | || (b2 < 0x40 || (b2 > 0x7E && b2 < 0xA1) || b2 > 0xFE)) | |
9da8350f | 6100 | error ("Invalid BIG5 code: %x", XFASTINT (code)); |
c28a9453 | 6101 | DECODE_BIG5 (b1, b2, charset, c1, c2); |
b73bfc1c | 6102 | XSETFASTINT (val, MAKE_CHAR (charset, c1, c2)); |
c28a9453 | 6103 | } |
4ed46869 KH |
6104 | return val; |
6105 | } | |
6106 | ||
6107 | DEFUN ("encode-big5-char", Fencode_big5_char, Sencode_big5_char, 1, 1, 0, | |
d46c5b12 | 6108 | "Encode the Big5 character CHAR to BIG5 coding system.\n\ |
4ed46869 KH |
6109 | Return the corresponding character code in Big5.") |
6110 | (ch) | |
6111 | Lisp_Object ch; | |
6112 | { | |
bcf26d6a | 6113 | int charset, c1, c2, b1, b2; |
4ed46869 KH |
6114 | Lisp_Object val; |
6115 | ||
6116 | CHECK_NUMBER (ch, 0); | |
6117 | SPLIT_CHAR (XFASTINT (ch), charset, c1, c2); | |
c28a9453 KH |
6118 | if (charset == CHARSET_ASCII) |
6119 | { | |
6120 | val = ch; | |
6121 | } | |
6122 | else if ((charset == charset_big5_1 | |
6123 | && (XFASTINT (ch) >= 0x250a1 && XFASTINT (ch) <= 0x271ec)) | |
6124 | || (charset == charset_big5_2 | |
6125 | && XFASTINT (ch) >= 0x290a1 && XFASTINT (ch) <= 0x2bdb2)) | |
4ed46869 KH |
6126 | { |
6127 | ENCODE_BIG5 (charset, c1, c2, b1, b2); | |
bcf26d6a | 6128 | XSETFASTINT (val, (b1 << 8) | b2); |
4ed46869 KH |
6129 | } |
6130 | else | |
c28a9453 | 6131 | error ("Can't encode to Big5: %d", XFASTINT (ch)); |
4ed46869 KH |
6132 | return val; |
6133 | } | |
3a73fa5d | 6134 | \f |
1ba9e4ab KH |
6135 | DEFUN ("set-terminal-coding-system-internal", |
6136 | Fset_terminal_coding_system_internal, | |
6137 | Sset_terminal_coding_system_internal, 1, 1, 0, "") | |
4ed46869 KH |
6138 | (coding_system) |
6139 | Lisp_Object coding_system; | |
6140 | { | |
6141 | CHECK_SYMBOL (coding_system, 0); | |
6142 | setup_coding_system (Fcheck_coding_system (coding_system), &terminal_coding); | |
70c22245 | 6143 | /* We had better not send unsafe characters to terminal. */ |
6e85d753 | 6144 | terminal_coding.flags |= CODING_FLAG_ISO_SAFE; |
ec6d2bb8 KH |
6145 | /* Characer composition should be disabled. */ |
6146 | terminal_coding.composing = COMPOSITION_DISABLED; | |
b73bfc1c KH |
6147 | terminal_coding.src_multibyte = 1; |
6148 | terminal_coding.dst_multibyte = 0; | |
4ed46869 KH |
6149 | return Qnil; |
6150 | } | |
6151 | ||
c4825358 KH |
6152 | DEFUN ("set-safe-terminal-coding-system-internal", |
6153 | Fset_safe_terminal_coding_system_internal, | |
6154 | Sset_safe_terminal_coding_system_internal, 1, 1, 0, "") | |
6155 | (coding_system) | |
6156 | Lisp_Object coding_system; | |
6157 | { | |
6158 | CHECK_SYMBOL (coding_system, 0); | |
6159 | setup_coding_system (Fcheck_coding_system (coding_system), | |
6160 | &safe_terminal_coding); | |
ec6d2bb8 KH |
6161 | /* Characer composition should be disabled. */ |
6162 | safe_terminal_coding.composing = COMPOSITION_DISABLED; | |
b73bfc1c KH |
6163 | safe_terminal_coding.src_multibyte = 1; |
6164 | safe_terminal_coding.dst_multibyte = 0; | |
c4825358 KH |
6165 | return Qnil; |
6166 | } | |
6167 | ||
4ed46869 KH |
6168 | DEFUN ("terminal-coding-system", |
6169 | Fterminal_coding_system, Sterminal_coding_system, 0, 0, 0, | |
3a73fa5d | 6170 | "Return coding system specified for terminal output.") |
4ed46869 KH |
6171 | () |
6172 | { | |
6173 | return terminal_coding.symbol; | |
6174 | } | |
6175 | ||
1ba9e4ab KH |
6176 | DEFUN ("set-keyboard-coding-system-internal", |
6177 | Fset_keyboard_coding_system_internal, | |
6178 | Sset_keyboard_coding_system_internal, 1, 1, 0, "") | |
4ed46869 KH |
6179 | (coding_system) |
6180 | Lisp_Object coding_system; | |
6181 | { | |
6182 | CHECK_SYMBOL (coding_system, 0); | |
6183 | setup_coding_system (Fcheck_coding_system (coding_system), &keyboard_coding); | |
ec6d2bb8 KH |
6184 | /* Characer composition should be disabled. */ |
6185 | keyboard_coding.composing = COMPOSITION_DISABLED; | |
4ed46869 KH |
6186 | return Qnil; |
6187 | } | |
6188 | ||
6189 | DEFUN ("keyboard-coding-system", | |
6190 | Fkeyboard_coding_system, Skeyboard_coding_system, 0, 0, 0, | |
3a73fa5d | 6191 | "Return coding system specified for decoding keyboard input.") |
4ed46869 KH |
6192 | () |
6193 | { | |
6194 | return keyboard_coding.symbol; | |
6195 | } | |
6196 | ||
6197 | \f | |
a5d301df KH |
6198 | DEFUN ("find-operation-coding-system", Ffind_operation_coding_system, |
6199 | Sfind_operation_coding_system, 1, MANY, 0, | |
6200 | "Choose a coding system for an operation based on the target name.\n\ | |
69f76525 | 6201 | The value names a pair of coding systems: (DECODING-SYSTEM . ENCODING-SYSTEM).\n\ |
9ce27fde KH |
6202 | DECODING-SYSTEM is the coding system to use for decoding\n\ |
6203 | \(in case OPERATION does decoding), and ENCODING-SYSTEM is the coding system\n\ | |
6204 | for encoding (in case OPERATION does encoding).\n\ | |
ccdb79f5 RS |
6205 | \n\ |
6206 | The first argument OPERATION specifies an I/O primitive:\n\ | |
6207 | For file I/O, `insert-file-contents' or `write-region'.\n\ | |
6208 | For process I/O, `call-process', `call-process-region', or `start-process'.\n\ | |
6209 | For network I/O, `open-network-stream'.\n\ | |
6210 | \n\ | |
6211 | The remaining arguments should be the same arguments that were passed\n\ | |
6212 | to the primitive. Depending on which primitive, one of those arguments\n\ | |
6213 | is selected as the TARGET. For example, if OPERATION does file I/O,\n\ | |
6214 | whichever argument specifies the file name is TARGET.\n\ | |
6215 | \n\ | |
6216 | TARGET has a meaning which depends on OPERATION:\n\ | |
4ed46869 KH |
6217 | For file I/O, TARGET is a file name.\n\ |
6218 | For process I/O, TARGET is a process name.\n\ | |
6219 | For network I/O, TARGET is a service name or a port number\n\ | |
6220 | \n\ | |
02ba4723 KH |
6221 | This function looks up what specified for TARGET in,\n\ |
6222 | `file-coding-system-alist', `process-coding-system-alist',\n\ | |
6223 | or `network-coding-system-alist' depending on OPERATION.\n\ | |
6224 | They may specify a coding system, a cons of coding systems,\n\ | |
6225 | or a function symbol to call.\n\ | |
6226 | In the last case, we call the function with one argument,\n\ | |
9ce27fde | 6227 | which is a list of all the arguments given to this function.") |
4ed46869 KH |
6228 | (nargs, args) |
6229 | int nargs; | |
6230 | Lisp_Object *args; | |
6231 | { | |
6232 | Lisp_Object operation, target_idx, target, val; | |
6233 | register Lisp_Object chain; | |
6234 | ||
6235 | if (nargs < 2) | |
6236 | error ("Too few arguments"); | |
6237 | operation = args[0]; | |
6238 | if (!SYMBOLP (operation) | |
6239 | || !INTEGERP (target_idx = Fget (operation, Qtarget_idx))) | |
6240 | error ("Invalid first arguement"); | |
6241 | if (nargs < 1 + XINT (target_idx)) | |
6242 | error ("Too few arguments for operation: %s", | |
6243 | XSYMBOL (operation)->name->data); | |
6244 | target = args[XINT (target_idx) + 1]; | |
6245 | if (!(STRINGP (target) | |
6246 | || (EQ (operation, Qopen_network_stream) && INTEGERP (target)))) | |
6247 | error ("Invalid %dth argument", XINT (target_idx) + 1); | |
6248 | ||
2e34157c RS |
6249 | chain = ((EQ (operation, Qinsert_file_contents) |
6250 | || EQ (operation, Qwrite_region)) | |
02ba4723 | 6251 | ? Vfile_coding_system_alist |
2e34157c | 6252 | : (EQ (operation, Qopen_network_stream) |
02ba4723 KH |
6253 | ? Vnetwork_coding_system_alist |
6254 | : Vprocess_coding_system_alist)); | |
4ed46869 KH |
6255 | if (NILP (chain)) |
6256 | return Qnil; | |
6257 | ||
03699b14 | 6258 | for (; CONSP (chain); chain = XCDR (chain)) |
4ed46869 | 6259 | { |
f44d27ce | 6260 | Lisp_Object elt; |
03699b14 | 6261 | elt = XCAR (chain); |
4ed46869 KH |
6262 | |
6263 | if (CONSP (elt) | |
6264 | && ((STRINGP (target) | |
03699b14 KR |
6265 | && STRINGP (XCAR (elt)) |
6266 | && fast_string_match (XCAR (elt), target) >= 0) | |
6267 | || (INTEGERP (target) && EQ (target, XCAR (elt))))) | |
02ba4723 | 6268 | { |
03699b14 | 6269 | val = XCDR (elt); |
b19fd4c5 KH |
6270 | /* Here, if VAL is both a valid coding system and a valid |
6271 | function symbol, we return VAL as a coding system. */ | |
02ba4723 KH |
6272 | if (CONSP (val)) |
6273 | return val; | |
6274 | if (! SYMBOLP (val)) | |
6275 | return Qnil; | |
6276 | if (! NILP (Fcoding_system_p (val))) | |
6277 | return Fcons (val, val); | |
b19fd4c5 KH |
6278 | if (! NILP (Ffboundp (val))) |
6279 | { | |
6280 | val = call1 (val, Flist (nargs, args)); | |
6281 | if (CONSP (val)) | |
6282 | return val; | |
6283 | if (SYMBOLP (val) && ! NILP (Fcoding_system_p (val))) | |
6284 | return Fcons (val, val); | |
6285 | } | |
02ba4723 KH |
6286 | return Qnil; |
6287 | } | |
4ed46869 KH |
6288 | } |
6289 | return Qnil; | |
6290 | } | |
6291 | ||
1397dc18 KH |
6292 | DEFUN ("update-coding-systems-internal", Fupdate_coding_systems_internal, |
6293 | Supdate_coding_systems_internal, 0, 0, 0, | |
6294 | "Update internal database for ISO2022 and CCL based coding systems.\n\ | |
fa42c37f KH |
6295 | When values of any coding categories are changed, you must\n\ |
6296 | call this function") | |
d46c5b12 KH |
6297 | () |
6298 | { | |
6299 | int i; | |
6300 | ||
fa42c37f | 6301 | for (i = CODING_CATEGORY_IDX_EMACS_MULE; i < CODING_CATEGORY_IDX_MAX; i++) |
d46c5b12 | 6302 | { |
1397dc18 KH |
6303 | Lisp_Object val; |
6304 | ||
6305 | val = XSYMBOL (XVECTOR (Vcoding_category_table)->contents[i])->value; | |
6306 | if (!NILP (val)) | |
6307 | { | |
6308 | if (! coding_system_table[i]) | |
6309 | coding_system_table[i] = ((struct coding_system *) | |
6310 | xmalloc (sizeof (struct coding_system))); | |
6311 | setup_coding_system (val, coding_system_table[i]); | |
6312 | } | |
6313 | else if (coding_system_table[i]) | |
6314 | { | |
6315 | xfree (coding_system_table[i]); | |
6316 | coding_system_table[i] = NULL; | |
6317 | } | |
d46c5b12 | 6318 | } |
1397dc18 | 6319 | |
d46c5b12 KH |
6320 | return Qnil; |
6321 | } | |
6322 | ||
66cfb530 KH |
6323 | DEFUN ("set-coding-priority-internal", Fset_coding_priority_internal, |
6324 | Sset_coding_priority_internal, 0, 0, 0, | |
6325 | "Update internal database for the current value of `coding-category-list'.\n\ | |
6326 | This function is internal use only.") | |
6327 | () | |
6328 | { | |
6329 | int i = 0, idx; | |
84d60297 RS |
6330 | Lisp_Object val; |
6331 | ||
6332 | val = Vcoding_category_list; | |
66cfb530 KH |
6333 | |
6334 | while (CONSP (val) && i < CODING_CATEGORY_IDX_MAX) | |
6335 | { | |
03699b14 | 6336 | if (! SYMBOLP (XCAR (val))) |
66cfb530 | 6337 | break; |
03699b14 | 6338 | idx = XFASTINT (Fget (XCAR (val), Qcoding_category_index)); |
66cfb530 KH |
6339 | if (idx >= CODING_CATEGORY_IDX_MAX) |
6340 | break; | |
6341 | coding_priorities[i++] = (1 << idx); | |
03699b14 | 6342 | val = XCDR (val); |
66cfb530 KH |
6343 | } |
6344 | /* If coding-category-list is valid and contains all coding | |
6345 | categories, `i' should be CODING_CATEGORY_IDX_MAX now. If not, | |
fa42c37f | 6346 | the following code saves Emacs from crashing. */ |
66cfb530 KH |
6347 | while (i < CODING_CATEGORY_IDX_MAX) |
6348 | coding_priorities[i++] = CODING_CATEGORY_MASK_RAW_TEXT; | |
6349 | ||
6350 | return Qnil; | |
6351 | } | |
6352 | ||
4ed46869 KH |
6353 | #endif /* emacs */ |
6354 | ||
6355 | \f | |
1397dc18 | 6356 | /*** 9. Post-amble ***/ |
4ed46869 | 6357 | |
dfcf069d | 6358 | void |
4ed46869 KH |
6359 | init_coding_once () |
6360 | { | |
6361 | int i; | |
6362 | ||
0ef69138 | 6363 | /* Emacs' internal format specific initialize routine. */ |
4ed46869 KH |
6364 | for (i = 0; i <= 0x20; i++) |
6365 | emacs_code_class[i] = EMACS_control_code; | |
6366 | emacs_code_class[0x0A] = EMACS_linefeed_code; | |
6367 | emacs_code_class[0x0D] = EMACS_carriage_return_code; | |
6368 | for (i = 0x21 ; i < 0x7F; i++) | |
6369 | emacs_code_class[i] = EMACS_ascii_code; | |
6370 | emacs_code_class[0x7F] = EMACS_control_code; | |
ec6d2bb8 | 6371 | for (i = 0x80; i < 0xFF; i++) |
4ed46869 KH |
6372 | emacs_code_class[i] = EMACS_invalid_code; |
6373 | emacs_code_class[LEADING_CODE_PRIVATE_11] = EMACS_leading_code_3; | |
6374 | emacs_code_class[LEADING_CODE_PRIVATE_12] = EMACS_leading_code_3; | |
6375 | emacs_code_class[LEADING_CODE_PRIVATE_21] = EMACS_leading_code_4; | |
6376 | emacs_code_class[LEADING_CODE_PRIVATE_22] = EMACS_leading_code_4; | |
6377 | ||
6378 | /* ISO2022 specific initialize routine. */ | |
6379 | for (i = 0; i < 0x20; i++) | |
b73bfc1c | 6380 | iso_code_class[i] = ISO_control_0; |
4ed46869 KH |
6381 | for (i = 0x21; i < 0x7F; i++) |
6382 | iso_code_class[i] = ISO_graphic_plane_0; | |
6383 | for (i = 0x80; i < 0xA0; i++) | |
b73bfc1c | 6384 | iso_code_class[i] = ISO_control_1; |
4ed46869 KH |
6385 | for (i = 0xA1; i < 0xFF; i++) |
6386 | iso_code_class[i] = ISO_graphic_plane_1; | |
6387 | iso_code_class[0x20] = iso_code_class[0x7F] = ISO_0x20_or_0x7F; | |
6388 | iso_code_class[0xA0] = iso_code_class[0xFF] = ISO_0xA0_or_0xFF; | |
6389 | iso_code_class[ISO_CODE_CR] = ISO_carriage_return; | |
6390 | iso_code_class[ISO_CODE_SO] = ISO_shift_out; | |
6391 | iso_code_class[ISO_CODE_SI] = ISO_shift_in; | |
6392 | iso_code_class[ISO_CODE_SS2_7] = ISO_single_shift_2_7; | |
6393 | iso_code_class[ISO_CODE_ESC] = ISO_escape; | |
6394 | iso_code_class[ISO_CODE_SS2] = ISO_single_shift_2; | |
6395 | iso_code_class[ISO_CODE_SS3] = ISO_single_shift_3; | |
6396 | iso_code_class[ISO_CODE_CSI] = ISO_control_sequence_introducer; | |
6397 | ||
e0e989f6 KH |
6398 | setup_coding_system (Qnil, &keyboard_coding); |
6399 | setup_coding_system (Qnil, &terminal_coding); | |
c4825358 | 6400 | setup_coding_system (Qnil, &safe_terminal_coding); |
6bc51348 | 6401 | setup_coding_system (Qnil, &default_buffer_file_coding); |
9ce27fde | 6402 | |
d46c5b12 KH |
6403 | bzero (coding_system_table, sizeof coding_system_table); |
6404 | ||
66cfb530 KH |
6405 | bzero (ascii_skip_code, sizeof ascii_skip_code); |
6406 | for (i = 0; i < 128; i++) | |
6407 | ascii_skip_code[i] = 1; | |
6408 | ||
9ce27fde KH |
6409 | #if defined (MSDOS) || defined (WINDOWSNT) |
6410 | system_eol_type = CODING_EOL_CRLF; | |
6411 | #else | |
6412 | system_eol_type = CODING_EOL_LF; | |
6413 | #endif | |
b843d1ae KH |
6414 | |
6415 | inhibit_pre_post_conversion = 0; | |
e0e989f6 KH |
6416 | } |
6417 | ||
6418 | #ifdef emacs | |
6419 | ||
dfcf069d | 6420 | void |
e0e989f6 KH |
6421 | syms_of_coding () |
6422 | { | |
6423 | Qtarget_idx = intern ("target-idx"); | |
6424 | staticpro (&Qtarget_idx); | |
6425 | ||
bb0115a2 RS |
6426 | Qcoding_system_history = intern ("coding-system-history"); |
6427 | staticpro (&Qcoding_system_history); | |
6428 | Fset (Qcoding_system_history, Qnil); | |
6429 | ||
9ce27fde | 6430 | /* Target FILENAME is the first argument. */ |
e0e989f6 | 6431 | Fput (Qinsert_file_contents, Qtarget_idx, make_number (0)); |
9ce27fde | 6432 | /* Target FILENAME is the third argument. */ |
e0e989f6 KH |
6433 | Fput (Qwrite_region, Qtarget_idx, make_number (2)); |
6434 | ||
6435 | Qcall_process = intern ("call-process"); | |
6436 | staticpro (&Qcall_process); | |
9ce27fde | 6437 | /* Target PROGRAM is the first argument. */ |
e0e989f6 KH |
6438 | Fput (Qcall_process, Qtarget_idx, make_number (0)); |
6439 | ||
6440 | Qcall_process_region = intern ("call-process-region"); | |
6441 | staticpro (&Qcall_process_region); | |
9ce27fde | 6442 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
6443 | Fput (Qcall_process_region, Qtarget_idx, make_number (2)); |
6444 | ||
6445 | Qstart_process = intern ("start-process"); | |
6446 | staticpro (&Qstart_process); | |
9ce27fde | 6447 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
6448 | Fput (Qstart_process, Qtarget_idx, make_number (2)); |
6449 | ||
6450 | Qopen_network_stream = intern ("open-network-stream"); | |
6451 | staticpro (&Qopen_network_stream); | |
9ce27fde | 6452 | /* Target SERVICE is the fourth argument. */ |
e0e989f6 KH |
6453 | Fput (Qopen_network_stream, Qtarget_idx, make_number (3)); |
6454 | ||
4ed46869 KH |
6455 | Qcoding_system = intern ("coding-system"); |
6456 | staticpro (&Qcoding_system); | |
6457 | ||
6458 | Qeol_type = intern ("eol-type"); | |
6459 | staticpro (&Qeol_type); | |
6460 | ||
6461 | Qbuffer_file_coding_system = intern ("buffer-file-coding-system"); | |
6462 | staticpro (&Qbuffer_file_coding_system); | |
6463 | ||
6464 | Qpost_read_conversion = intern ("post-read-conversion"); | |
6465 | staticpro (&Qpost_read_conversion); | |
6466 | ||
6467 | Qpre_write_conversion = intern ("pre-write-conversion"); | |
6468 | staticpro (&Qpre_write_conversion); | |
6469 | ||
27901516 KH |
6470 | Qno_conversion = intern ("no-conversion"); |
6471 | staticpro (&Qno_conversion); | |
6472 | ||
6473 | Qundecided = intern ("undecided"); | |
6474 | staticpro (&Qundecided); | |
6475 | ||
4ed46869 KH |
6476 | Qcoding_system_p = intern ("coding-system-p"); |
6477 | staticpro (&Qcoding_system_p); | |
6478 | ||
6479 | Qcoding_system_error = intern ("coding-system-error"); | |
6480 | staticpro (&Qcoding_system_error); | |
6481 | ||
6482 | Fput (Qcoding_system_error, Qerror_conditions, | |
6483 | Fcons (Qcoding_system_error, Fcons (Qerror, Qnil))); | |
6484 | Fput (Qcoding_system_error, Qerror_message, | |
9ce27fde | 6485 | build_string ("Invalid coding system")); |
4ed46869 | 6486 | |
d46c5b12 KH |
6487 | Qcoding_category = intern ("coding-category"); |
6488 | staticpro (&Qcoding_category); | |
4ed46869 KH |
6489 | Qcoding_category_index = intern ("coding-category-index"); |
6490 | staticpro (&Qcoding_category_index); | |
6491 | ||
d46c5b12 KH |
6492 | Vcoding_category_table |
6493 | = Fmake_vector (make_number (CODING_CATEGORY_IDX_MAX), Qnil); | |
6494 | staticpro (&Vcoding_category_table); | |
4ed46869 KH |
6495 | { |
6496 | int i; | |
6497 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
6498 | { | |
d46c5b12 KH |
6499 | XVECTOR (Vcoding_category_table)->contents[i] |
6500 | = intern (coding_category_name[i]); | |
6501 | Fput (XVECTOR (Vcoding_category_table)->contents[i], | |
6502 | Qcoding_category_index, make_number (i)); | |
4ed46869 KH |
6503 | } |
6504 | } | |
6505 | ||
f967223b KH |
6506 | Qtranslation_table = intern ("translation-table"); |
6507 | staticpro (&Qtranslation_table); | |
1397dc18 | 6508 | Fput (Qtranslation_table, Qchar_table_extra_slots, make_number (1)); |
bdd9fb48 | 6509 | |
f967223b KH |
6510 | Qtranslation_table_id = intern ("translation-table-id"); |
6511 | staticpro (&Qtranslation_table_id); | |
84fbb8a0 | 6512 | |
f967223b KH |
6513 | Qtranslation_table_for_decode = intern ("translation-table-for-decode"); |
6514 | staticpro (&Qtranslation_table_for_decode); | |
a5d301df | 6515 | |
f967223b KH |
6516 | Qtranslation_table_for_encode = intern ("translation-table-for-encode"); |
6517 | staticpro (&Qtranslation_table_for_encode); | |
a5d301df | 6518 | |
05e6f5dc KH |
6519 | Qsafe_chars = intern ("safe-chars"); |
6520 | staticpro (&Qsafe_chars); | |
6521 | ||
6522 | Qchar_coding_system = intern ("char-coding-system"); | |
6523 | staticpro (&Qchar_coding_system); | |
6524 | ||
6525 | /* Intern this now in case it isn't already done. | |
6526 | Setting this variable twice is harmless. | |
6527 | But don't staticpro it here--that is done in alloc.c. */ | |
6528 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
6529 | Fput (Qsafe_chars, Qchar_table_extra_slots, make_number (0)); | |
6530 | Fput (Qchar_coding_system, Qchar_table_extra_slots, make_number (1)); | |
70c22245 | 6531 | |
1397dc18 KH |
6532 | Qvalid_codes = intern ("valid-codes"); |
6533 | staticpro (&Qvalid_codes); | |
6534 | ||
9ce27fde KH |
6535 | Qemacs_mule = intern ("emacs-mule"); |
6536 | staticpro (&Qemacs_mule); | |
6537 | ||
d46c5b12 KH |
6538 | Qraw_text = intern ("raw-text"); |
6539 | staticpro (&Qraw_text); | |
6540 | ||
4ed46869 KH |
6541 | defsubr (&Scoding_system_p); |
6542 | defsubr (&Sread_coding_system); | |
6543 | defsubr (&Sread_non_nil_coding_system); | |
6544 | defsubr (&Scheck_coding_system); | |
6545 | defsubr (&Sdetect_coding_region); | |
d46c5b12 | 6546 | defsubr (&Sdetect_coding_string); |
05e6f5dc | 6547 | defsubr (&Sfind_coding_systems_region_internal); |
4ed46869 KH |
6548 | defsubr (&Sdecode_coding_region); |
6549 | defsubr (&Sencode_coding_region); | |
6550 | defsubr (&Sdecode_coding_string); | |
6551 | defsubr (&Sencode_coding_string); | |
6552 | defsubr (&Sdecode_sjis_char); | |
6553 | defsubr (&Sencode_sjis_char); | |
6554 | defsubr (&Sdecode_big5_char); | |
6555 | defsubr (&Sencode_big5_char); | |
1ba9e4ab | 6556 | defsubr (&Sset_terminal_coding_system_internal); |
c4825358 | 6557 | defsubr (&Sset_safe_terminal_coding_system_internal); |
4ed46869 | 6558 | defsubr (&Sterminal_coding_system); |
1ba9e4ab | 6559 | defsubr (&Sset_keyboard_coding_system_internal); |
4ed46869 | 6560 | defsubr (&Skeyboard_coding_system); |
a5d301df | 6561 | defsubr (&Sfind_operation_coding_system); |
1397dc18 | 6562 | defsubr (&Supdate_coding_systems_internal); |
66cfb530 | 6563 | defsubr (&Sset_coding_priority_internal); |
4ed46869 | 6564 | |
4608c386 KH |
6565 | DEFVAR_LISP ("coding-system-list", &Vcoding_system_list, |
6566 | "List of coding systems.\n\ | |
6567 | \n\ | |
6568 | Do not alter the value of this variable manually. This variable should be\n\ | |
6569 | updated by the functions `make-coding-system' and\n\ | |
6570 | `define-coding-system-alias'."); | |
6571 | Vcoding_system_list = Qnil; | |
6572 | ||
6573 | DEFVAR_LISP ("coding-system-alist", &Vcoding_system_alist, | |
6574 | "Alist of coding system names.\n\ | |
6575 | Each element is one element list of coding system name.\n\ | |
6576 | This variable is given to `completing-read' as TABLE argument.\n\ | |
6577 | \n\ | |
6578 | Do not alter the value of this variable manually. This variable should be\n\ | |
6579 | updated by the functions `make-coding-system' and\n\ | |
6580 | `define-coding-system-alias'."); | |
6581 | Vcoding_system_alist = Qnil; | |
6582 | ||
4ed46869 KH |
6583 | DEFVAR_LISP ("coding-category-list", &Vcoding_category_list, |
6584 | "List of coding-categories (symbols) ordered by priority."); | |
6585 | { | |
6586 | int i; | |
6587 | ||
6588 | Vcoding_category_list = Qnil; | |
6589 | for (i = CODING_CATEGORY_IDX_MAX - 1; i >= 0; i--) | |
6590 | Vcoding_category_list | |
d46c5b12 KH |
6591 | = Fcons (XVECTOR (Vcoding_category_table)->contents[i], |
6592 | Vcoding_category_list); | |
4ed46869 KH |
6593 | } |
6594 | ||
6595 | DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read, | |
10bff6f1 | 6596 | "Specify the coding system for read operations.\n\ |
2ebb362d | 6597 | It is useful to bind this variable with `let', but do not set it globally.\n\ |
4ed46869 | 6598 | If the value is a coding system, it is used for decoding on read operation.\n\ |
a67a9c66 | 6599 | If not, an appropriate element is used from one of the coding system alists:\n\ |
10bff6f1 | 6600 | There are three such tables, `file-coding-system-alist',\n\ |
a67a9c66 | 6601 | `process-coding-system-alist', and `network-coding-system-alist'."); |
4ed46869 KH |
6602 | Vcoding_system_for_read = Qnil; |
6603 | ||
6604 | DEFVAR_LISP ("coding-system-for-write", &Vcoding_system_for_write, | |
10bff6f1 | 6605 | "Specify the coding system for write operations.\n\ |
928aedd8 RS |
6606 | Programs bind this variable with `let', but you should not set it globally.\n\ |
6607 | If the value is a coding system, it is used for encoding of output,\n\ | |
6608 | when writing it to a file and when sending it to a file or subprocess.\n\ | |
6609 | \n\ | |
6610 | If this does not specify a coding system, an appropriate element\n\ | |
6611 | is used from one of the coding system alists:\n\ | |
10bff6f1 | 6612 | There are three such tables, `file-coding-system-alist',\n\ |
928aedd8 RS |
6613 | `process-coding-system-alist', and `network-coding-system-alist'.\n\ |
6614 | For output to files, if the above procedure does not specify a coding system,\n\ | |
6615 | the value of `buffer-file-coding-system' is used."); | |
4ed46869 KH |
6616 | Vcoding_system_for_write = Qnil; |
6617 | ||
6618 | DEFVAR_LISP ("last-coding-system-used", &Vlast_coding_system_used, | |
a67a9c66 | 6619 | "Coding system used in the latest file or process I/O."); |
4ed46869 KH |
6620 | Vlast_coding_system_used = Qnil; |
6621 | ||
9ce27fde | 6622 | DEFVAR_BOOL ("inhibit-eol-conversion", &inhibit_eol_conversion, |
f07f4a24 | 6623 | "*Non-nil means always inhibit code conversion of end-of-line format.\n\ |
94c7a214 DL |
6624 | See info node `Coding Systems' and info node `Text and Binary' concerning\n\ |
6625 | such conversion."); | |
9ce27fde KH |
6626 | inhibit_eol_conversion = 0; |
6627 | ||
ed29121d EZ |
6628 | DEFVAR_BOOL ("inherit-process-coding-system", &inherit_process_coding_system, |
6629 | "Non-nil means process buffer inherits coding system of process output.\n\ | |
6630 | Bind it to t if the process output is to be treated as if it were a file\n\ | |
6631 | read from some filesystem."); | |
6632 | inherit_process_coding_system = 0; | |
6633 | ||
02ba4723 KH |
6634 | DEFVAR_LISP ("file-coding-system-alist", &Vfile_coding_system_alist, |
6635 | "Alist to decide a coding system to use for a file I/O operation.\n\ | |
6636 | The format is ((PATTERN . VAL) ...),\n\ | |
6637 | where PATTERN is a regular expression matching a file name,\n\ | |
6638 | VAL is a coding system, a cons of coding systems, or a function symbol.\n\ | |
6639 | If VAL is a coding system, it is used for both decoding and encoding\n\ | |
6640 | the file contents.\n\ | |
6641 | If VAL is a cons of coding systems, the car part is used for decoding,\n\ | |
6642 | and the cdr part is used for encoding.\n\ | |
6643 | If VAL is a function symbol, the function must return a coding system\n\ | |
6644 | or a cons of coding systems which are used as above.\n\ | |
e0e989f6 | 6645 | \n\ |
a85a871a | 6646 | See also the function `find-operation-coding-system'\n\ |
eda284ac | 6647 | and the variable `auto-coding-alist'."); |
02ba4723 KH |
6648 | Vfile_coding_system_alist = Qnil; |
6649 | ||
6650 | DEFVAR_LISP ("process-coding-system-alist", &Vprocess_coding_system_alist, | |
6651 | "Alist to decide a coding system to use for a process I/O operation.\n\ | |
6652 | The format is ((PATTERN . VAL) ...),\n\ | |
6653 | where PATTERN is a regular expression matching a program name,\n\ | |
6654 | VAL is a coding system, a cons of coding systems, or a function symbol.\n\ | |
6655 | If VAL is a coding system, it is used for both decoding what received\n\ | |
6656 | from the program and encoding what sent to the program.\n\ | |
6657 | If VAL is a cons of coding systems, the car part is used for decoding,\n\ | |
6658 | and the cdr part is used for encoding.\n\ | |
6659 | If VAL is a function symbol, the function must return a coding system\n\ | |
6660 | or a cons of coding systems which are used as above.\n\ | |
4ed46869 | 6661 | \n\ |
9ce27fde | 6662 | See also the function `find-operation-coding-system'."); |
02ba4723 KH |
6663 | Vprocess_coding_system_alist = Qnil; |
6664 | ||
6665 | DEFVAR_LISP ("network-coding-system-alist", &Vnetwork_coding_system_alist, | |
6666 | "Alist to decide a coding system to use for a network I/O operation.\n\ | |
6667 | The format is ((PATTERN . VAL) ...),\n\ | |
6668 | where PATTERN is a regular expression matching a network service name\n\ | |
6669 | or is a port number to connect to,\n\ | |
6670 | VAL is a coding system, a cons of coding systems, or a function symbol.\n\ | |
6671 | If VAL is a coding system, it is used for both decoding what received\n\ | |
6672 | from the network stream and encoding what sent to the network stream.\n\ | |
6673 | If VAL is a cons of coding systems, the car part is used for decoding,\n\ | |
6674 | and the cdr part is used for encoding.\n\ | |
6675 | If VAL is a function symbol, the function must return a coding system\n\ | |
6676 | or a cons of coding systems which are used as above.\n\ | |
4ed46869 | 6677 | \n\ |
9ce27fde | 6678 | See also the function `find-operation-coding-system'."); |
02ba4723 | 6679 | Vnetwork_coding_system_alist = Qnil; |
4ed46869 | 6680 | |
68c45bf0 PE |
6681 | DEFVAR_LISP ("locale-coding-system", &Vlocale_coding_system, |
6682 | "Coding system to use with system messages."); | |
6683 | Vlocale_coding_system = Qnil; | |
6684 | ||
005f0d35 | 6685 | /* The eol mnemonics are reset in startup.el system-dependently. */ |
7722baf9 EZ |
6686 | DEFVAR_LISP ("eol-mnemonic-unix", &eol_mnemonic_unix, |
6687 | "*String displayed in mode line for UNIX-like (LF) end-of-line format."); | |
6688 | eol_mnemonic_unix = build_string (":"); | |
4ed46869 | 6689 | |
7722baf9 EZ |
6690 | DEFVAR_LISP ("eol-mnemonic-dos", &eol_mnemonic_dos, |
6691 | "*String displayed in mode line for DOS-like (CRLF) end-of-line format."); | |
6692 | eol_mnemonic_dos = build_string ("\\"); | |
4ed46869 | 6693 | |
7722baf9 EZ |
6694 | DEFVAR_LISP ("eol-mnemonic-mac", &eol_mnemonic_mac, |
6695 | "*String displayed in mode line for MAC-like (CR) end-of-line format."); | |
6696 | eol_mnemonic_mac = build_string ("/"); | |
4ed46869 | 6697 | |
7722baf9 EZ |
6698 | DEFVAR_LISP ("eol-mnemonic-undecided", &eol_mnemonic_undecided, |
6699 | "*String displayed in mode line when end-of-line format is not yet determined."); | |
6700 | eol_mnemonic_undecided = build_string (":"); | |
4ed46869 | 6701 | |
84fbb8a0 | 6702 | DEFVAR_LISP ("enable-character-translation", &Venable_character_translation, |
f967223b | 6703 | "*Non-nil enables character translation while encoding and decoding."); |
84fbb8a0 | 6704 | Venable_character_translation = Qt; |
bdd9fb48 | 6705 | |
f967223b KH |
6706 | DEFVAR_LISP ("standard-translation-table-for-decode", |
6707 | &Vstandard_translation_table_for_decode, | |
84fbb8a0 | 6708 | "Table for translating characters while decoding."); |
f967223b | 6709 | Vstandard_translation_table_for_decode = Qnil; |
bdd9fb48 | 6710 | |
f967223b KH |
6711 | DEFVAR_LISP ("standard-translation-table-for-encode", |
6712 | &Vstandard_translation_table_for_encode, | |
84fbb8a0 | 6713 | "Table for translationg characters while encoding."); |
f967223b | 6714 | Vstandard_translation_table_for_encode = Qnil; |
4ed46869 KH |
6715 | |
6716 | DEFVAR_LISP ("charset-revision-table", &Vcharset_revision_alist, | |
6717 | "Alist of charsets vs revision numbers.\n\ | |
6718 | While encoding, if a charset (car part of an element) is found,\n\ | |
6719 | designate it with the escape sequence identifing revision (cdr part of the element)."); | |
6720 | Vcharset_revision_alist = Qnil; | |
02ba4723 KH |
6721 | |
6722 | DEFVAR_LISP ("default-process-coding-system", | |
6723 | &Vdefault_process_coding_system, | |
6724 | "Cons of coding systems used for process I/O by default.\n\ | |
6725 | The car part is used for decoding a process output,\n\ | |
6726 | the cdr part is used for encoding a text to be sent to a process."); | |
6727 | Vdefault_process_coding_system = Qnil; | |
c4825358 | 6728 | |
3f003981 KH |
6729 | DEFVAR_LISP ("latin-extra-code-table", &Vlatin_extra_code_table, |
6730 | "Table of extra Latin codes in the range 128..159 (inclusive).\n\ | |
c4825358 KH |
6731 | This is a vector of length 256.\n\ |
6732 | If Nth element is non-nil, the existence of code N in a file\n\ | |
bb0115a2 | 6733 | \(or output of subprocess) doesn't prevent it to be detected as\n\ |
3f003981 KH |
6734 | a coding system of ISO 2022 variant which has a flag\n\ |
6735 | `accept-latin-extra-code' t (e.g. iso-latin-1) on reading a file\n\ | |
c4825358 KH |
6736 | or reading output of a subprocess.\n\ |
6737 | Only 128th through 159th elements has a meaning."); | |
3f003981 | 6738 | Vlatin_extra_code_table = Fmake_vector (make_number (256), Qnil); |
d46c5b12 KH |
6739 | |
6740 | DEFVAR_LISP ("select-safe-coding-system-function", | |
6741 | &Vselect_safe_coding_system_function, | |
6742 | "Function to call to select safe coding system for encoding a text.\n\ | |
6743 | \n\ | |
6744 | If set, this function is called to force a user to select a proper\n\ | |
6745 | coding system which can encode the text in the case that a default\n\ | |
6746 | coding system used in each operation can't encode the text.\n\ | |
6747 | \n\ | |
a85a871a | 6748 | The default value is `select-safe-coding-system' (which see)."); |
d46c5b12 KH |
6749 | Vselect_safe_coding_system_function = Qnil; |
6750 | ||
05e6f5dc KH |
6751 | DEFVAR_LISP ("char-coding-system-table", &Vchar_coding_system_table, |
6752 | "Char-table containing safe coding systems of each characters.\n\ | |
6753 | Each element doesn't include such generic coding systems that can\n\ | |
6754 | encode any characters. They are in the first extra slot."); | |
6755 | Vchar_coding_system_table = Fmake_char_table (Qchar_coding_system, Qnil); | |
6756 | ||
22ab2303 | 6757 | DEFVAR_BOOL ("inhibit-iso-escape-detection", |
74383408 KH |
6758 | &inhibit_iso_escape_detection, |
6759 | "If non-nil, Emacs ignores ISO2022's escape sequence on code detection.\n\ | |
6760 | \n\ | |
6761 | By default, on reading a file, Emacs tries to detect how the text is\n\ | |
6762 | encoded. This code detection is sensitive to escape sequences. If\n\ | |
e215fa58 EZ |
6763 | the sequence is valid as ISO2022, the code is determined as one of\n\ |
6764 | the ISO2022 encodings, and the file is decoded by the corresponding\n\ | |
6765 | coding system (e.g. `iso-2022-7bit').\n\ | |
74383408 KH |
6766 | \n\ |
6767 | However, there may be a case that you want to read escape sequences in\n\ | |
6768 | a file as is. In such a case, you can set this variable to non-nil.\n\ | |
6769 | Then, as the code detection ignores any escape sequences, no file is\n\ | |
e215fa58 EZ |
6770 | detected as encoded in some ISO2022 encoding. The result is that all\n\ |
6771 | escape sequences become visible in a buffer.\n\ | |
74383408 KH |
6772 | \n\ |
6773 | The default value is nil, and it is strongly recommended not to change\n\ | |
6774 | it. That is because many Emacs Lisp source files that contain\n\ | |
6775 | non-ASCII characters are encoded by the coding system `iso-2022-7bit'\n\ | |
6776 | in Emacs's distribution, and they won't be decoded correctly on\n\ | |
e215fa58 | 6777 | reading if you suppress escape sequence detection.\n\ |
74383408 KH |
6778 | \n\ |
6779 | The other way to read escape sequences in a file without decoding is\n\ | |
e215fa58 | 6780 | to explicitly specify some coding system that doesn't use ISO2022's\n\ |
74383408 KH |
6781 | escape sequence (e.g `latin-1') on reading by \\[universal-coding-system-argument]."); |
6782 | inhibit_iso_escape_detection = 0; | |
4ed46869 KH |
6783 | } |
6784 | ||
68c45bf0 PE |
6785 | char * |
6786 | emacs_strerror (error_number) | |
6787 | int error_number; | |
6788 | { | |
6789 | char *str; | |
6790 | ||
ca9c0567 | 6791 | synchronize_system_messages_locale (); |
68c45bf0 PE |
6792 | str = strerror (error_number); |
6793 | ||
6794 | if (! NILP (Vlocale_coding_system)) | |
6795 | { | |
6796 | Lisp_Object dec = code_convert_string_norecord (build_string (str), | |
6797 | Vlocale_coding_system, | |
6798 | 0); | |
6799 | str = (char *) XSTRING (dec)->data; | |
6800 | } | |
6801 | ||
6802 | return str; | |
6803 | } | |
6804 | ||
4ed46869 | 6805 | #endif /* emacs */ |
c2f94ebc | 6806 |