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4ed46869 | 1 | /* Coding system handler (conversion, detection, and etc). |
f1ce3dcf | 2 | Copyright (C) 1995,97,1998,2002,2003 Electrotechnical Laboratory, JAPAN. |
203cb916 | 3 | Licensed to the Free Software Foundation. |
58f99379 | 4 | Copyright (C) 2001,2002,2003 Free Software Foundation, Inc. |
4ed46869 | 5 | |
369314dc KH |
6 | This file is part of GNU Emacs. |
7 | ||
8 | GNU Emacs is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
4ed46869 | 12 | |
369314dc KH |
13 | GNU Emacs is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
4ed46869 | 17 | |
369314dc KH |
18 | You should have received a copy of the GNU General Public License |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
20 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
4ed46869 KH |
22 | |
23 | /*** TABLE OF CONTENTS *** | |
24 | ||
b73bfc1c | 25 | 0. General comments |
4ed46869 | 26 | 1. Preamble |
0ef69138 | 27 | 2. Emacs' internal format (emacs-mule) handlers |
4ed46869 KH |
28 | 3. ISO2022 handlers |
29 | 4. Shift-JIS and BIG5 handlers | |
1397dc18 KH |
30 | 5. CCL handlers |
31 | 6. End-of-line handlers | |
32 | 7. C library functions | |
33 | 8. Emacs Lisp library functions | |
34 | 9. Post-amble | |
4ed46869 KH |
35 | |
36 | */ | |
37 | ||
b73bfc1c KH |
38 | /*** 0. General comments ***/ |
39 | ||
40 | ||
cfb43547 | 41 | /*** GENERAL NOTE on CODING SYSTEMS *** |
4ed46869 | 42 | |
cfb43547 | 43 | A coding system is an encoding mechanism for one or more character |
4ed46869 KH |
44 | sets. Here's a list of coding systems which Emacs can handle. When |
45 | we say "decode", it means converting some other coding system to | |
cfb43547 | 46 | Emacs' internal format (emacs-mule), and when we say "encode", |
0ef69138 KH |
47 | it means converting the coding system emacs-mule to some other |
48 | coding system. | |
4ed46869 | 49 | |
0ef69138 | 50 | 0. Emacs' internal format (emacs-mule) |
4ed46869 | 51 | |
cfb43547 | 52 | Emacs itself holds a multi-lingual character in buffers and strings |
f4dee582 | 53 | in a special format. Details are described in section 2. |
4ed46869 KH |
54 | |
55 | 1. ISO2022 | |
56 | ||
57 | The most famous coding system for multiple character sets. X's | |
f4dee582 RS |
58 | Compound Text, various EUCs (Extended Unix Code), and coding |
59 | systems used in Internet communication such as ISO-2022-JP are | |
60 | all variants of ISO2022. Details are described in section 3. | |
4ed46869 KH |
61 | |
62 | 2. SJIS (or Shift-JIS or MS-Kanji-Code) | |
93dec019 | 63 | |
4ed46869 KH |
64 | A coding system to encode character sets: ASCII, JISX0201, and |
65 | JISX0208. Widely used for PC's in Japan. Details are described in | |
f4dee582 | 66 | section 4. |
4ed46869 KH |
67 | |
68 | 3. BIG5 | |
69 | ||
cfb43547 DL |
70 | A coding system to encode the character sets ASCII and Big5. Widely |
71 | used for Chinese (mainly in Taiwan and Hong Kong). Details are | |
f4dee582 RS |
72 | described in section 4. In this file, when we write "BIG5" |
73 | (all uppercase), we mean the coding system, and when we write | |
74 | "Big5" (capitalized), we mean the character set. | |
4ed46869 | 75 | |
27901516 KH |
76 | 4. Raw text |
77 | ||
cfb43547 DL |
78 | A coding system for text containing random 8-bit code. Emacs does |
79 | no code conversion on such text except for end-of-line format. | |
27901516 KH |
80 | |
81 | 5. Other | |
4ed46869 | 82 | |
cfb43547 DL |
83 | If a user wants to read/write text encoded in a coding system not |
84 | listed above, he can supply a decoder and an encoder for it as CCL | |
4ed46869 KH |
85 | (Code Conversion Language) programs. Emacs executes the CCL program |
86 | while reading/writing. | |
87 | ||
d46c5b12 KH |
88 | Emacs represents a coding system by a Lisp symbol that has a property |
89 | `coding-system'. But, before actually using the coding system, the | |
4ed46869 | 90 | information about it is set in a structure of type `struct |
f4dee582 | 91 | coding_system' for rapid processing. See section 6 for more details. |
4ed46869 KH |
92 | |
93 | */ | |
94 | ||
95 | /*** GENERAL NOTES on END-OF-LINE FORMAT *** | |
96 | ||
cfb43547 DL |
97 | How end-of-line of text is encoded depends on the operating system. |
98 | For instance, Unix's format is just one byte of `line-feed' code, | |
f4dee582 | 99 | whereas DOS's format is two-byte sequence of `carriage-return' and |
d46c5b12 KH |
100 | `line-feed' codes. MacOS's format is usually one byte of |
101 | `carriage-return'. | |
4ed46869 | 102 | |
cfb43547 DL |
103 | Since text character encoding and end-of-line encoding are |
104 | independent, any coding system described above can have any | |
105 | end-of-line format. So Emacs has information about end-of-line | |
106 | format in each coding-system. See section 6 for more details. | |
4ed46869 KH |
107 | |
108 | */ | |
109 | ||
110 | /*** GENERAL NOTES on `detect_coding_XXX ()' functions *** | |
111 | ||
112 | These functions check if a text between SRC and SRC_END is encoded | |
113 | in the coding system category XXX. Each returns an integer value in | |
cfb43547 | 114 | which appropriate flag bits for the category XXX are set. The flag |
4ed46869 | 115 | bits are defined in macros CODING_CATEGORY_MASK_XXX. Below is the |
cfb43547 | 116 | template for these functions. If MULTIBYTEP is nonzero, 8-bit codes |
0a28aafb | 117 | of the range 0x80..0x9F are in multibyte form. */ |
4ed46869 KH |
118 | #if 0 |
119 | int | |
0a28aafb | 120 | detect_coding_emacs_mule (src, src_end, multibytep) |
4ed46869 | 121 | unsigned char *src, *src_end; |
0a28aafb | 122 | int multibytep; |
4ed46869 KH |
123 | { |
124 | ... | |
125 | } | |
126 | #endif | |
127 | ||
128 | /*** GENERAL NOTES on `decode_coding_XXX ()' functions *** | |
129 | ||
b73bfc1c KH |
130 | These functions decode SRC_BYTES length of unibyte text at SOURCE |
131 | encoded in CODING to Emacs' internal format. The resulting | |
132 | multibyte text goes to a place pointed to by DESTINATION, the length | |
133 | of which should not exceed DST_BYTES. | |
d46c5b12 | 134 | |
cfb43547 DL |
135 | These functions set the information about original and decoded texts |
136 | in the members `produced', `produced_char', `consumed', and | |
137 | `consumed_char' of the structure *CODING. They also set the member | |
138 | `result' to one of CODING_FINISH_XXX indicating how the decoding | |
139 | finished. | |
d46c5b12 | 140 | |
cfb43547 | 141 | DST_BYTES zero means that the source area and destination area are |
d46c5b12 | 142 | overlapped, which means that we can produce a decoded text until it |
cfb43547 | 143 | reaches the head of the not-yet-decoded source text. |
d46c5b12 | 144 | |
cfb43547 | 145 | Below is a template for these functions. */ |
4ed46869 | 146 | #if 0 |
b73bfc1c | 147 | static void |
d46c5b12 | 148 | decode_coding_XXX (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
149 | struct coding_system *coding; |
150 | unsigned char *source, *destination; | |
151 | int src_bytes, dst_bytes; | |
4ed46869 KH |
152 | { |
153 | ... | |
154 | } | |
155 | #endif | |
156 | ||
157 | /*** GENERAL NOTES on `encode_coding_XXX ()' functions *** | |
158 | ||
cfb43547 | 159 | These functions encode SRC_BYTES length text at SOURCE from Emacs' |
b73bfc1c KH |
160 | internal multibyte format to CODING. The resulting unibyte text |
161 | goes to a place pointed to by DESTINATION, the length of which | |
162 | should not exceed DST_BYTES. | |
d46c5b12 | 163 | |
cfb43547 DL |
164 | These functions set the information about original and encoded texts |
165 | in the members `produced', `produced_char', `consumed', and | |
166 | `consumed_char' of the structure *CODING. They also set the member | |
167 | `result' to one of CODING_FINISH_XXX indicating how the encoding | |
168 | finished. | |
d46c5b12 | 169 | |
cfb43547 DL |
170 | DST_BYTES zero means that the source area and destination area are |
171 | overlapped, which means that we can produce encoded text until it | |
172 | reaches at the head of the not-yet-encoded source text. | |
d46c5b12 | 173 | |
cfb43547 | 174 | Below is a template for these functions. */ |
4ed46869 | 175 | #if 0 |
b73bfc1c | 176 | static void |
d46c5b12 | 177 | encode_coding_XXX (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
178 | struct coding_system *coding; |
179 | unsigned char *source, *destination; | |
180 | int src_bytes, dst_bytes; | |
4ed46869 KH |
181 | { |
182 | ... | |
183 | } | |
184 | #endif | |
185 | ||
186 | /*** COMMONLY USED MACROS ***/ | |
187 | ||
b73bfc1c KH |
188 | /* The following two macros ONE_MORE_BYTE and TWO_MORE_BYTES safely |
189 | get one, two, and three bytes from the source text respectively. | |
190 | If there are not enough bytes in the source, they jump to | |
191 | `label_end_of_loop'. The caller should set variables `coding', | |
192 | `src' and `src_end' to appropriate pointer in advance. These | |
193 | macros are called from decoding routines `decode_coding_XXX', thus | |
194 | it is assumed that the source text is unibyte. */ | |
4ed46869 | 195 | |
b73bfc1c KH |
196 | #define ONE_MORE_BYTE(c1) \ |
197 | do { \ | |
198 | if (src >= src_end) \ | |
199 | { \ | |
200 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
201 | goto label_end_of_loop; \ | |
202 | } \ | |
203 | c1 = *src++; \ | |
4ed46869 KH |
204 | } while (0) |
205 | ||
b73bfc1c KH |
206 | #define TWO_MORE_BYTES(c1, c2) \ |
207 | do { \ | |
208 | if (src + 1 >= src_end) \ | |
209 | { \ | |
210 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
211 | goto label_end_of_loop; \ | |
212 | } \ | |
213 | c1 = *src++; \ | |
214 | c2 = *src++; \ | |
4ed46869 KH |
215 | } while (0) |
216 | ||
4ed46869 | 217 | |
0a28aafb KH |
218 | /* Like ONE_MORE_BYTE, but 8-bit bytes of data at SRC are in multibyte |
219 | form if MULTIBYTEP is nonzero. */ | |
220 | ||
221 | #define ONE_MORE_BYTE_CHECK_MULTIBYTE(c1, multibytep) \ | |
222 | do { \ | |
223 | if (src >= src_end) \ | |
224 | { \ | |
225 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
226 | goto label_end_of_loop; \ | |
227 | } \ | |
228 | c1 = *src++; \ | |
229 | if (multibytep && c1 == LEADING_CODE_8_BIT_CONTROL) \ | |
230 | c1 = *src++ - 0x20; \ | |
231 | } while (0) | |
232 | ||
b73bfc1c KH |
233 | /* Set C to the next character at the source text pointed by `src'. |
234 | If there are not enough characters in the source, jump to | |
235 | `label_end_of_loop'. The caller should set variables `coding' | |
236 | `src', `src_end', and `translation_table' to appropriate pointers | |
237 | in advance. This macro is used in encoding routines | |
238 | `encode_coding_XXX', thus it assumes that the source text is in | |
239 | multibyte form except for 8-bit characters. 8-bit characters are | |
240 | in multibyte form if coding->src_multibyte is nonzero, else they | |
241 | are represented by a single byte. */ | |
4ed46869 | 242 | |
b73bfc1c KH |
243 | #define ONE_MORE_CHAR(c) \ |
244 | do { \ | |
245 | int len = src_end - src; \ | |
246 | int bytes; \ | |
247 | if (len <= 0) \ | |
248 | { \ | |
249 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
250 | goto label_end_of_loop; \ | |
251 | } \ | |
252 | if (coding->src_multibyte \ | |
253 | || UNIBYTE_STR_AS_MULTIBYTE_P (src, len, bytes)) \ | |
254 | c = STRING_CHAR_AND_LENGTH (src, len, bytes); \ | |
255 | else \ | |
256 | c = *src, bytes = 1; \ | |
257 | if (!NILP (translation_table)) \ | |
39658efc | 258 | c = translate_char (translation_table, c, -1, 0, 0); \ |
b73bfc1c | 259 | src += bytes; \ |
4ed46869 KH |
260 | } while (0) |
261 | ||
4ed46869 | 262 | |
8ca3766a | 263 | /* Produce a multibyte form of character C to `dst'. Jump to |
b73bfc1c KH |
264 | `label_end_of_loop' if there's not enough space at `dst'. |
265 | ||
cfb43547 | 266 | If we are now in the middle of a composition sequence, the decoded |
b73bfc1c KH |
267 | character may be ALTCHAR (for the current composition). In that |
268 | case, the character goes to coding->cmp_data->data instead of | |
269 | `dst'. | |
270 | ||
271 | This macro is used in decoding routines. */ | |
272 | ||
273 | #define EMIT_CHAR(c) \ | |
4ed46869 | 274 | do { \ |
b73bfc1c KH |
275 | if (! COMPOSING_P (coding) \ |
276 | || coding->composing == COMPOSITION_RELATIVE \ | |
277 | || coding->composing == COMPOSITION_WITH_RULE) \ | |
278 | { \ | |
279 | int bytes = CHAR_BYTES (c); \ | |
280 | if ((dst + bytes) > (dst_bytes ? dst_end : src)) \ | |
281 | { \ | |
282 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
283 | goto label_end_of_loop; \ | |
284 | } \ | |
285 | dst += CHAR_STRING (c, dst); \ | |
286 | coding->produced_char++; \ | |
287 | } \ | |
ec6d2bb8 | 288 | \ |
b73bfc1c KH |
289 | if (COMPOSING_P (coding) \ |
290 | && coding->composing != COMPOSITION_RELATIVE) \ | |
291 | { \ | |
292 | CODING_ADD_COMPOSITION_COMPONENT (coding, c); \ | |
293 | coding->composition_rule_follows \ | |
294 | = coding->composing != COMPOSITION_WITH_ALTCHARS; \ | |
295 | } \ | |
4ed46869 KH |
296 | } while (0) |
297 | ||
4ed46869 | 298 | |
b73bfc1c KH |
299 | #define EMIT_ONE_BYTE(c) \ |
300 | do { \ | |
301 | if (dst >= (dst_bytes ? dst_end : src)) \ | |
302 | { \ | |
303 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
304 | goto label_end_of_loop; \ | |
305 | } \ | |
306 | *dst++ = c; \ | |
307 | } while (0) | |
308 | ||
309 | #define EMIT_TWO_BYTES(c1, c2) \ | |
310 | do { \ | |
311 | if (dst + 2 > (dst_bytes ? dst_end : src)) \ | |
312 | { \ | |
313 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
314 | goto label_end_of_loop; \ | |
315 | } \ | |
316 | *dst++ = c1, *dst++ = c2; \ | |
317 | } while (0) | |
318 | ||
319 | #define EMIT_BYTES(from, to) \ | |
320 | do { \ | |
321 | if (dst + (to - from) > (dst_bytes ? dst_end : src)) \ | |
322 | { \ | |
323 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
324 | goto label_end_of_loop; \ | |
325 | } \ | |
326 | while (from < to) \ | |
327 | *dst++ = *from++; \ | |
4ed46869 KH |
328 | } while (0) |
329 | ||
330 | \f | |
331 | /*** 1. Preamble ***/ | |
332 | ||
68c45bf0 PE |
333 | #ifdef emacs |
334 | #include <config.h> | |
335 | #endif | |
336 | ||
4ed46869 KH |
337 | #include <stdio.h> |
338 | ||
339 | #ifdef emacs | |
340 | ||
4ed46869 KH |
341 | #include "lisp.h" |
342 | #include "buffer.h" | |
343 | #include "charset.h" | |
ec6d2bb8 | 344 | #include "composite.h" |
4ed46869 KH |
345 | #include "ccl.h" |
346 | #include "coding.h" | |
347 | #include "window.h" | |
66638433 | 348 | #include "intervals.h" |
4ed46869 KH |
349 | |
350 | #else /* not emacs */ | |
351 | ||
352 | #include "mulelib.h" | |
353 | ||
354 | #endif /* not emacs */ | |
355 | ||
356 | Lisp_Object Qcoding_system, Qeol_type; | |
357 | Lisp_Object Qbuffer_file_coding_system; | |
358 | Lisp_Object Qpost_read_conversion, Qpre_write_conversion; | |
27901516 | 359 | Lisp_Object Qno_conversion, Qundecided; |
bb0115a2 | 360 | Lisp_Object Qcoding_system_history; |
05e6f5dc | 361 | Lisp_Object Qsafe_chars; |
1397dc18 | 362 | Lisp_Object Qvalid_codes; |
4ed46869 KH |
363 | |
364 | extern Lisp_Object Qinsert_file_contents, Qwrite_region; | |
365 | Lisp_Object Qcall_process, Qcall_process_region, Qprocess_argument; | |
366 | Lisp_Object Qstart_process, Qopen_network_stream; | |
367 | Lisp_Object Qtarget_idx; | |
368 | ||
a362520d KH |
369 | /* If a symbol has this property, evaluate the value to define the |
370 | symbol as a coding system. */ | |
371 | Lisp_Object Qcoding_system_define_form; | |
372 | ||
d46c5b12 KH |
373 | Lisp_Object Vselect_safe_coding_system_function; |
374 | ||
5d5bf4d8 KH |
375 | int coding_system_require_warning; |
376 | ||
7722baf9 EZ |
377 | /* Mnemonic string for each format of end-of-line. */ |
378 | Lisp_Object eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac; | |
379 | /* Mnemonic string to indicate format of end-of-line is not yet | |
4ed46869 | 380 | decided. */ |
7722baf9 | 381 | Lisp_Object eol_mnemonic_undecided; |
4ed46869 | 382 | |
9ce27fde KH |
383 | /* Format of end-of-line decided by system. This is CODING_EOL_LF on |
384 | Unix, CODING_EOL_CRLF on DOS/Windows, and CODING_EOL_CR on Mac. */ | |
385 | int system_eol_type; | |
386 | ||
4ed46869 KH |
387 | #ifdef emacs |
388 | ||
6b89e3aa KH |
389 | /* Information about which coding system is safe for which chars. |
390 | The value has the form (GENERIC-LIST . NON-GENERIC-ALIST). | |
391 | ||
392 | GENERIC-LIST is a list of generic coding systems which can encode | |
393 | any characters. | |
394 | ||
395 | NON-GENERIC-ALIST is an alist of non generic coding systems vs the | |
396 | corresponding char table that contains safe chars. */ | |
397 | Lisp_Object Vcoding_system_safe_chars; | |
398 | ||
4608c386 KH |
399 | Lisp_Object Vcoding_system_list, Vcoding_system_alist; |
400 | ||
401 | Lisp_Object Qcoding_system_p, Qcoding_system_error; | |
4ed46869 | 402 | |
d46c5b12 KH |
403 | /* Coding system emacs-mule and raw-text are for converting only |
404 | end-of-line format. */ | |
405 | Lisp_Object Qemacs_mule, Qraw_text; | |
9ce27fde | 406 | |
ecf488bc DL |
407 | Lisp_Object Qutf_8; |
408 | ||
4ed46869 KH |
409 | /* Coding-systems are handed between Emacs Lisp programs and C internal |
410 | routines by the following three variables. */ | |
411 | /* Coding-system for reading files and receiving data from process. */ | |
412 | Lisp_Object Vcoding_system_for_read; | |
413 | /* Coding-system for writing files and sending data to process. */ | |
414 | Lisp_Object Vcoding_system_for_write; | |
415 | /* Coding-system actually used in the latest I/O. */ | |
416 | Lisp_Object Vlast_coding_system_used; | |
417 | ||
c4825358 | 418 | /* A vector of length 256 which contains information about special |
94487c4e | 419 | Latin codes (especially for dealing with Microsoft codes). */ |
3f003981 | 420 | Lisp_Object Vlatin_extra_code_table; |
c4825358 | 421 | |
9ce27fde KH |
422 | /* Flag to inhibit code conversion of end-of-line format. */ |
423 | int inhibit_eol_conversion; | |
424 | ||
74383408 KH |
425 | /* Flag to inhibit ISO2022 escape sequence detection. */ |
426 | int inhibit_iso_escape_detection; | |
427 | ||
ed29121d EZ |
428 | /* Flag to make buffer-file-coding-system inherit from process-coding. */ |
429 | int inherit_process_coding_system; | |
430 | ||
c4825358 | 431 | /* Coding system to be used to encode text for terminal display. */ |
4ed46869 KH |
432 | struct coding_system terminal_coding; |
433 | ||
c4825358 KH |
434 | /* Coding system to be used to encode text for terminal display when |
435 | terminal coding system is nil. */ | |
436 | struct coding_system safe_terminal_coding; | |
437 | ||
438 | /* Coding system of what is sent from terminal keyboard. */ | |
4ed46869 KH |
439 | struct coding_system keyboard_coding; |
440 | ||
6bc51348 KH |
441 | /* Default coding system to be used to write a file. */ |
442 | struct coding_system default_buffer_file_coding; | |
443 | ||
02ba4723 KH |
444 | Lisp_Object Vfile_coding_system_alist; |
445 | Lisp_Object Vprocess_coding_system_alist; | |
446 | Lisp_Object Vnetwork_coding_system_alist; | |
4ed46869 | 447 | |
68c45bf0 PE |
448 | Lisp_Object Vlocale_coding_system; |
449 | ||
4ed46869 KH |
450 | #endif /* emacs */ |
451 | ||
d46c5b12 | 452 | Lisp_Object Qcoding_category, Qcoding_category_index; |
4ed46869 KH |
453 | |
454 | /* List of symbols `coding-category-xxx' ordered by priority. */ | |
455 | Lisp_Object Vcoding_category_list; | |
456 | ||
d46c5b12 KH |
457 | /* Table of coding categories (Lisp symbols). */ |
458 | Lisp_Object Vcoding_category_table; | |
4ed46869 KH |
459 | |
460 | /* Table of names of symbol for each coding-category. */ | |
461 | char *coding_category_name[CODING_CATEGORY_IDX_MAX] = { | |
0ef69138 | 462 | "coding-category-emacs-mule", |
4ed46869 KH |
463 | "coding-category-sjis", |
464 | "coding-category-iso-7", | |
d46c5b12 | 465 | "coding-category-iso-7-tight", |
4ed46869 KH |
466 | "coding-category-iso-8-1", |
467 | "coding-category-iso-8-2", | |
7717c392 KH |
468 | "coding-category-iso-7-else", |
469 | "coding-category-iso-8-else", | |
89fa8b36 | 470 | "coding-category-ccl", |
4ed46869 | 471 | "coding-category-big5", |
fa42c37f KH |
472 | "coding-category-utf-8", |
473 | "coding-category-utf-16-be", | |
474 | "coding-category-utf-16-le", | |
27901516 | 475 | "coding-category-raw-text", |
89fa8b36 | 476 | "coding-category-binary" |
4ed46869 KH |
477 | }; |
478 | ||
66cfb530 | 479 | /* Table of pointers to coding systems corresponding to each coding |
d46c5b12 KH |
480 | categories. */ |
481 | struct coding_system *coding_system_table[CODING_CATEGORY_IDX_MAX]; | |
482 | ||
66cfb530 | 483 | /* Table of coding category masks. Nth element is a mask for a coding |
8ca3766a | 484 | category of which priority is Nth. */ |
66cfb530 KH |
485 | static |
486 | int coding_priorities[CODING_CATEGORY_IDX_MAX]; | |
487 | ||
f967223b KH |
488 | /* Flag to tell if we look up translation table on character code |
489 | conversion. */ | |
84fbb8a0 | 490 | Lisp_Object Venable_character_translation; |
f967223b KH |
491 | /* Standard translation table to look up on decoding (reading). */ |
492 | Lisp_Object Vstandard_translation_table_for_decode; | |
493 | /* Standard translation table to look up on encoding (writing). */ | |
494 | Lisp_Object Vstandard_translation_table_for_encode; | |
84fbb8a0 | 495 | |
f967223b KH |
496 | Lisp_Object Qtranslation_table; |
497 | Lisp_Object Qtranslation_table_id; | |
498 | Lisp_Object Qtranslation_table_for_decode; | |
499 | Lisp_Object Qtranslation_table_for_encode; | |
4ed46869 KH |
500 | |
501 | /* Alist of charsets vs revision number. */ | |
502 | Lisp_Object Vcharset_revision_alist; | |
503 | ||
02ba4723 KH |
504 | /* Default coding systems used for process I/O. */ |
505 | Lisp_Object Vdefault_process_coding_system; | |
506 | ||
002fdb44 DL |
507 | /* Char table for translating Quail and self-inserting input. */ |
508 | Lisp_Object Vtranslation_table_for_input; | |
509 | ||
b843d1ae KH |
510 | /* Global flag to tell that we can't call post-read-conversion and |
511 | pre-write-conversion functions. Usually the value is zero, but it | |
512 | is set to 1 temporarily while such functions are running. This is | |
513 | to avoid infinite recursive call. */ | |
514 | static int inhibit_pre_post_conversion; | |
515 | ||
05e6f5dc KH |
516 | Lisp_Object Qchar_coding_system; |
517 | ||
6b89e3aa KH |
518 | /* Return `safe-chars' property of CODING_SYSTEM (symbol). Don't check |
519 | its validity. */ | |
05e6f5dc KH |
520 | |
521 | Lisp_Object | |
6b89e3aa KH |
522 | coding_safe_chars (coding_system) |
523 | Lisp_Object coding_system; | |
05e6f5dc KH |
524 | { |
525 | Lisp_Object coding_spec, plist, safe_chars; | |
93dec019 | 526 | |
6b89e3aa | 527 | coding_spec = Fget (coding_system, Qcoding_system); |
05e6f5dc KH |
528 | plist = XVECTOR (coding_spec)->contents[3]; |
529 | safe_chars = Fplist_get (XVECTOR (coding_spec)->contents[3], Qsafe_chars); | |
530 | return (CHAR_TABLE_P (safe_chars) ? safe_chars : Qt); | |
531 | } | |
532 | ||
533 | #define CODING_SAFE_CHAR_P(safe_chars, c) \ | |
534 | (EQ (safe_chars, Qt) || !NILP (CHAR_TABLE_REF (safe_chars, c))) | |
535 | ||
4ed46869 | 536 | \f |
0ef69138 | 537 | /*** 2. Emacs internal format (emacs-mule) handlers ***/ |
4ed46869 | 538 | |
aa72b389 KH |
539 | /* Emacs' internal format for representation of multiple character |
540 | sets is a kind of multi-byte encoding, i.e. characters are | |
541 | represented by variable-length sequences of one-byte codes. | |
b73bfc1c KH |
542 | |
543 | ASCII characters and control characters (e.g. `tab', `newline') are | |
544 | represented by one-byte sequences which are their ASCII codes, in | |
545 | the range 0x00 through 0x7F. | |
546 | ||
547 | 8-bit characters of the range 0x80..0x9F are represented by | |
548 | two-byte sequences of LEADING_CODE_8_BIT_CONTROL and (their 8-bit | |
549 | code + 0x20). | |
550 | ||
551 | 8-bit characters of the range 0xA0..0xFF are represented by | |
552 | one-byte sequences which are their 8-bit code. | |
553 | ||
554 | The other characters are represented by a sequence of `base | |
555 | leading-code', optional `extended leading-code', and one or two | |
556 | `position-code's. The length of the sequence is determined by the | |
aa72b389 | 557 | base leading-code. Leading-code takes the range 0x81 through 0x9D, |
b73bfc1c KH |
558 | whereas extended leading-code and position-code take the range 0xA0 |
559 | through 0xFF. See `charset.h' for more details about leading-code | |
560 | and position-code. | |
f4dee582 | 561 | |
4ed46869 | 562 | --- CODE RANGE of Emacs' internal format --- |
b73bfc1c KH |
563 | character set range |
564 | ------------- ----- | |
565 | ascii 0x00..0x7F | |
566 | eight-bit-control LEADING_CODE_8_BIT_CONTROL + 0xA0..0xBF | |
567 | eight-bit-graphic 0xA0..0xBF | |
aa72b389 | 568 | ELSE 0x81..0x9D + [0xA0..0xFF]+ |
4ed46869 KH |
569 | --------------------------------------------- |
570 | ||
aa72b389 KH |
571 | As this is the internal character representation, the format is |
572 | usually not used externally (i.e. in a file or in a data sent to a | |
573 | process). But, it is possible to have a text externally in this | |
574 | format (i.e. by encoding by the coding system `emacs-mule'). | |
575 | ||
576 | In that case, a sequence of one-byte codes has a slightly different | |
577 | form. | |
578 | ||
ae5145c2 | 579 | Firstly, all characters in eight-bit-control are represented by |
aa72b389 KH |
580 | one-byte sequences which are their 8-bit code. |
581 | ||
582 | Next, character composition data are represented by the byte | |
583 | sequence of the form: 0x80 METHOD BYTES CHARS COMPONENT ..., | |
584 | where, | |
585 | METHOD is 0xF0 plus one of composition method (enum | |
586 | composition_method), | |
587 | ||
ae5145c2 | 588 | BYTES is 0xA0 plus the byte length of these composition data, |
aa72b389 | 589 | |
ae5145c2 | 590 | CHARS is 0xA0 plus the number of characters composed by these |
aa72b389 KH |
591 | data, |
592 | ||
8ca3766a | 593 | COMPONENTs are characters of multibyte form or composition |
aa72b389 KH |
594 | rules encoded by two-byte of ASCII codes. |
595 | ||
596 | In addition, for backward compatibility, the following formats are | |
597 | also recognized as composition data on decoding. | |
598 | ||
599 | 0x80 MSEQ ... | |
600 | 0x80 0xFF MSEQ RULE MSEQ RULE ... MSEQ | |
601 | ||
602 | Here, | |
603 | MSEQ is a multibyte form but in these special format: | |
604 | ASCII: 0xA0 ASCII_CODE+0x80, | |
605 | other: LEADING_CODE+0x20 FOLLOWING-BYTE ..., | |
606 | RULE is a one byte code of the range 0xA0..0xF0 that | |
607 | represents a composition rule. | |
4ed46869 KH |
608 | */ |
609 | ||
610 | enum emacs_code_class_type emacs_code_class[256]; | |
611 | ||
4ed46869 KH |
612 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
613 | Check if a text is encoded in Emacs' internal format. If it is, | |
d46c5b12 | 614 | return CODING_CATEGORY_MASK_EMACS_MULE, else return 0. */ |
4ed46869 | 615 | |
0a28aafb KH |
616 | static int |
617 | detect_coding_emacs_mule (src, src_end, multibytep) | |
b73bfc1c | 618 | unsigned char *src, *src_end; |
0a28aafb | 619 | int multibytep; |
4ed46869 KH |
620 | { |
621 | unsigned char c; | |
622 | int composing = 0; | |
b73bfc1c KH |
623 | /* Dummy for ONE_MORE_BYTE. */ |
624 | struct coding_system dummy_coding; | |
625 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 626 | |
b73bfc1c | 627 | while (1) |
4ed46869 | 628 | { |
0a28aafb | 629 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
4ed46869 KH |
630 | |
631 | if (composing) | |
632 | { | |
633 | if (c < 0xA0) | |
634 | composing = 0; | |
b73bfc1c KH |
635 | else if (c == 0xA0) |
636 | { | |
0a28aafb | 637 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
b73bfc1c KH |
638 | c &= 0x7F; |
639 | } | |
4ed46869 KH |
640 | else |
641 | c -= 0x20; | |
642 | } | |
643 | ||
b73bfc1c | 644 | if (c < 0x20) |
4ed46869 | 645 | { |
4ed46869 KH |
646 | if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) |
647 | return 0; | |
b73bfc1c KH |
648 | } |
649 | else if (c >= 0x80 && c < 0xA0) | |
650 | { | |
651 | if (c == 0x80) | |
652 | /* Old leading code for a composite character. */ | |
653 | composing = 1; | |
654 | else | |
655 | { | |
656 | unsigned char *src_base = src - 1; | |
657 | int bytes; | |
4ed46869 | 658 | |
b73bfc1c KH |
659 | if (!UNIBYTE_STR_AS_MULTIBYTE_P (src_base, src_end - src_base, |
660 | bytes)) | |
661 | return 0; | |
662 | src = src_base + bytes; | |
663 | } | |
664 | } | |
665 | } | |
666 | label_end_of_loop: | |
667 | return CODING_CATEGORY_MASK_EMACS_MULE; | |
668 | } | |
4ed46869 | 669 | |
4ed46869 | 670 | |
aa72b389 KH |
671 | /* Record the starting position START and METHOD of one composition. */ |
672 | ||
673 | #define CODING_ADD_COMPOSITION_START(coding, start, method) \ | |
674 | do { \ | |
675 | struct composition_data *cmp_data = coding->cmp_data; \ | |
676 | int *data = cmp_data->data + cmp_data->used; \ | |
677 | coding->cmp_data_start = cmp_data->used; \ | |
678 | data[0] = -1; \ | |
679 | data[1] = cmp_data->char_offset + start; \ | |
680 | data[3] = (int) method; \ | |
681 | cmp_data->used += 4; \ | |
682 | } while (0) | |
683 | ||
684 | /* Record the ending position END of the current composition. */ | |
685 | ||
686 | #define CODING_ADD_COMPOSITION_END(coding, end) \ | |
687 | do { \ | |
688 | struct composition_data *cmp_data = coding->cmp_data; \ | |
689 | int *data = cmp_data->data + coding->cmp_data_start; \ | |
690 | data[0] = cmp_data->used - coding->cmp_data_start; \ | |
691 | data[2] = cmp_data->char_offset + end; \ | |
692 | } while (0) | |
693 | ||
694 | /* Record one COMPONENT (alternate character or composition rule). */ | |
695 | ||
b6871cc7 KH |
696 | #define CODING_ADD_COMPOSITION_COMPONENT(coding, component) \ |
697 | do { \ | |
698 | coding->cmp_data->data[coding->cmp_data->used++] = component; \ | |
699 | if (coding->cmp_data->used - coding->cmp_data_start \ | |
700 | == COMPOSITION_DATA_MAX_BUNCH_LENGTH) \ | |
701 | { \ | |
702 | CODING_ADD_COMPOSITION_END (coding, coding->produced_char); \ | |
703 | coding->composing = COMPOSITION_NO; \ | |
704 | } \ | |
705 | } while (0) | |
aa72b389 KH |
706 | |
707 | ||
708 | /* Get one byte from a data pointed by SRC and increment SRC. If SRC | |
8ca3766a | 709 | is not less than SRC_END, return -1 without incrementing Src. */ |
aa72b389 KH |
710 | |
711 | #define SAFE_ONE_MORE_BYTE() (src >= src_end ? -1 : *src++) | |
712 | ||
713 | ||
714 | /* Decode a character represented as a component of composition | |
715 | sequence of Emacs 20 style at SRC. Set C to that character, store | |
716 | its multibyte form sequence at P, and set P to the end of that | |
717 | sequence. If no valid character is found, set C to -1. */ | |
718 | ||
719 | #define DECODE_EMACS_MULE_COMPOSITION_CHAR(c, p) \ | |
720 | do { \ | |
721 | int bytes; \ | |
fd3ae0b9 | 722 | \ |
aa72b389 KH |
723 | c = SAFE_ONE_MORE_BYTE (); \ |
724 | if (c < 0) \ | |
725 | break; \ | |
726 | if (CHAR_HEAD_P (c)) \ | |
727 | c = -1; \ | |
728 | else if (c == 0xA0) \ | |
729 | { \ | |
730 | c = SAFE_ONE_MORE_BYTE (); \ | |
731 | if (c < 0xA0) \ | |
732 | c = -1; \ | |
733 | else \ | |
734 | { \ | |
735 | c -= 0xA0; \ | |
736 | *p++ = c; \ | |
737 | } \ | |
738 | } \ | |
739 | else if (BASE_LEADING_CODE_P (c - 0x20)) \ | |
740 | { \ | |
741 | unsigned char *p0 = p; \ | |
742 | \ | |
743 | c -= 0x20; \ | |
744 | *p++ = c; \ | |
745 | bytes = BYTES_BY_CHAR_HEAD (c); \ | |
746 | while (--bytes) \ | |
747 | { \ | |
748 | c = SAFE_ONE_MORE_BYTE (); \ | |
749 | if (c < 0) \ | |
750 | break; \ | |
751 | *p++ = c; \ | |
752 | } \ | |
fd3ae0b9 KH |
753 | if (UNIBYTE_STR_AS_MULTIBYTE_P (p0, p - p0, bytes) \ |
754 | || (coding->flags /* We are recovering a file. */ \ | |
755 | && p0[0] == LEADING_CODE_8_BIT_CONTROL \ | |
756 | && ! CHAR_HEAD_P (p0[1]))) \ | |
aa72b389 KH |
757 | c = STRING_CHAR (p0, bytes); \ |
758 | else \ | |
759 | c = -1; \ | |
760 | } \ | |
761 | else \ | |
762 | c = -1; \ | |
763 | } while (0) | |
764 | ||
765 | ||
766 | /* Decode a composition rule represented as a component of composition | |
767 | sequence of Emacs 20 style at SRC. Set C to the rule. If not | |
768 | valid rule is found, set C to -1. */ | |
769 | ||
770 | #define DECODE_EMACS_MULE_COMPOSITION_RULE(c) \ | |
771 | do { \ | |
772 | c = SAFE_ONE_MORE_BYTE (); \ | |
773 | c -= 0xA0; \ | |
774 | if (c < 0 || c >= 81) \ | |
775 | c = -1; \ | |
776 | else \ | |
777 | { \ | |
778 | gref = c / 9, nref = c % 9; \ | |
779 | c = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
780 | } \ | |
781 | } while (0) | |
782 | ||
783 | ||
784 | /* Decode composition sequence encoded by `emacs-mule' at the source | |
785 | pointed by SRC. SRC_END is the end of source. Store information | |
786 | of the composition in CODING->cmp_data. | |
787 | ||
788 | For backward compatibility, decode also a composition sequence of | |
789 | Emacs 20 style. In that case, the composition sequence contains | |
790 | characters that should be extracted into a buffer or string. Store | |
791 | those characters at *DESTINATION in multibyte form. | |
792 | ||
793 | If we encounter an invalid byte sequence, return 0. | |
794 | If we encounter an insufficient source or destination, or | |
795 | insufficient space in CODING->cmp_data, return 1. | |
796 | Otherwise, return consumed bytes in the source. | |
797 | ||
798 | */ | |
799 | static INLINE int | |
800 | decode_composition_emacs_mule (coding, src, src_end, | |
801 | destination, dst_end, dst_bytes) | |
802 | struct coding_system *coding; | |
803 | unsigned char *src, *src_end, **destination, *dst_end; | |
804 | int dst_bytes; | |
805 | { | |
806 | unsigned char *dst = *destination; | |
807 | int method, data_len, nchars; | |
808 | unsigned char *src_base = src++; | |
8ca3766a | 809 | /* Store components of composition. */ |
aa72b389 KH |
810 | int component[COMPOSITION_DATA_MAX_BUNCH_LENGTH]; |
811 | int ncomponent; | |
812 | /* Store multibyte form of characters to be composed. This is for | |
813 | Emacs 20 style composition sequence. */ | |
814 | unsigned char buf[MAX_COMPOSITION_COMPONENTS * MAX_MULTIBYTE_LENGTH]; | |
815 | unsigned char *bufp = buf; | |
816 | int c, i, gref, nref; | |
817 | ||
818 | if (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH | |
819 | >= COMPOSITION_DATA_SIZE) | |
820 | { | |
821 | coding->result = CODING_FINISH_INSUFFICIENT_CMP; | |
822 | return -1; | |
823 | } | |
824 | ||
825 | ONE_MORE_BYTE (c); | |
826 | if (c - 0xF0 >= COMPOSITION_RELATIVE | |
827 | && c - 0xF0 <= COMPOSITION_WITH_RULE_ALTCHARS) | |
828 | { | |
829 | int with_rule; | |
830 | ||
831 | method = c - 0xF0; | |
832 | with_rule = (method == COMPOSITION_WITH_RULE | |
833 | || method == COMPOSITION_WITH_RULE_ALTCHARS); | |
834 | ONE_MORE_BYTE (c); | |
835 | data_len = c - 0xA0; | |
836 | if (data_len < 4 | |
837 | || src_base + data_len > src_end) | |
838 | return 0; | |
839 | ONE_MORE_BYTE (c); | |
840 | nchars = c - 0xA0; | |
841 | if (c < 1) | |
842 | return 0; | |
843 | for (ncomponent = 0; src < src_base + data_len; ncomponent++) | |
844 | { | |
b1887814 RS |
845 | /* If it is longer than this, it can't be valid. */ |
846 | if (ncomponent >= COMPOSITION_DATA_MAX_BUNCH_LENGTH) | |
847 | return 0; | |
848 | ||
aa72b389 KH |
849 | if (ncomponent % 2 && with_rule) |
850 | { | |
851 | ONE_MORE_BYTE (gref); | |
852 | gref -= 32; | |
853 | ONE_MORE_BYTE (nref); | |
854 | nref -= 32; | |
855 | c = COMPOSITION_ENCODE_RULE (gref, nref); | |
856 | } | |
857 | else | |
858 | { | |
859 | int bytes; | |
fd3ae0b9 KH |
860 | if (UNIBYTE_STR_AS_MULTIBYTE_P (src, src_end - src, bytes) |
861 | || (coding->flags /* We are recovering a file. */ | |
862 | && src[0] == LEADING_CODE_8_BIT_CONTROL | |
863 | && ! CHAR_HEAD_P (src[1]))) | |
aa72b389 KH |
864 | c = STRING_CHAR (src, bytes); |
865 | else | |
866 | c = *src, bytes = 1; | |
867 | src += bytes; | |
868 | } | |
869 | component[ncomponent] = c; | |
870 | } | |
871 | } | |
872 | else | |
873 | { | |
874 | /* This may be an old Emacs 20 style format. See the comment at | |
875 | the section 2 of this file. */ | |
876 | while (src < src_end && !CHAR_HEAD_P (*src)) src++; | |
877 | if (src == src_end | |
878 | && !(coding->mode & CODING_MODE_LAST_BLOCK)) | |
879 | goto label_end_of_loop; | |
880 | ||
881 | src_end = src; | |
882 | src = src_base + 1; | |
883 | if (c < 0xC0) | |
884 | { | |
885 | method = COMPOSITION_RELATIVE; | |
886 | for (ncomponent = 0; ncomponent < MAX_COMPOSITION_COMPONENTS;) | |
887 | { | |
888 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
889 | if (c < 0) | |
890 | break; | |
891 | component[ncomponent++] = c; | |
892 | } | |
893 | if (ncomponent < 2) | |
894 | return 0; | |
895 | nchars = ncomponent; | |
896 | } | |
897 | else if (c == 0xFF) | |
898 | { | |
899 | method = COMPOSITION_WITH_RULE; | |
900 | src++; | |
901 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
902 | if (c < 0) | |
903 | return 0; | |
904 | component[0] = c; | |
905 | for (ncomponent = 1; | |
906 | ncomponent < MAX_COMPOSITION_COMPONENTS * 2 - 1;) | |
907 | { | |
908 | DECODE_EMACS_MULE_COMPOSITION_RULE (c); | |
909 | if (c < 0) | |
910 | break; | |
911 | component[ncomponent++] = c; | |
912 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
913 | if (c < 0) | |
914 | break; | |
915 | component[ncomponent++] = c; | |
916 | } | |
917 | if (ncomponent < 3) | |
918 | return 0; | |
919 | nchars = (ncomponent + 1) / 2; | |
920 | } | |
921 | else | |
922 | return 0; | |
923 | } | |
924 | ||
925 | if (buf == bufp || dst + (bufp - buf) <= (dst_bytes ? dst_end : src)) | |
926 | { | |
927 | CODING_ADD_COMPOSITION_START (coding, coding->produced_char, method); | |
928 | for (i = 0; i < ncomponent; i++) | |
929 | CODING_ADD_COMPOSITION_COMPONENT (coding, component[i]); | |
93dec019 | 930 | CODING_ADD_COMPOSITION_END (coding, coding->produced_char + nchars); |
aa72b389 KH |
931 | if (buf < bufp) |
932 | { | |
933 | unsigned char *p = buf; | |
934 | EMIT_BYTES (p, bufp); | |
935 | *destination += bufp - buf; | |
936 | coding->produced_char += nchars; | |
937 | } | |
938 | return (src - src_base); | |
939 | } | |
940 | label_end_of_loop: | |
941 | return -1; | |
942 | } | |
943 | ||
b73bfc1c | 944 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
4ed46869 | 945 | |
b73bfc1c KH |
946 | static void |
947 | decode_coding_emacs_mule (coding, source, destination, src_bytes, dst_bytes) | |
948 | struct coding_system *coding; | |
949 | unsigned char *source, *destination; | |
950 | int src_bytes, dst_bytes; | |
951 | { | |
952 | unsigned char *src = source; | |
953 | unsigned char *src_end = source + src_bytes; | |
954 | unsigned char *dst = destination; | |
955 | unsigned char *dst_end = destination + dst_bytes; | |
956 | /* SRC_BASE remembers the start position in source in each loop. | |
957 | The loop will be exited when there's not enough source code, or | |
958 | when there's not enough destination area to produce a | |
959 | character. */ | |
960 | unsigned char *src_base; | |
4ed46869 | 961 | |
b73bfc1c | 962 | coding->produced_char = 0; |
8a33cf7b | 963 | while ((src_base = src) < src_end) |
b73bfc1c KH |
964 | { |
965 | unsigned char tmp[MAX_MULTIBYTE_LENGTH], *p; | |
966 | int bytes; | |
ec6d2bb8 | 967 | |
4af310db EZ |
968 | if (*src == '\r') |
969 | { | |
2bcdf662 | 970 | int c = *src++; |
4af310db | 971 | |
4af310db EZ |
972 | if (coding->eol_type == CODING_EOL_CR) |
973 | c = '\n'; | |
974 | else if (coding->eol_type == CODING_EOL_CRLF) | |
975 | { | |
976 | ONE_MORE_BYTE (c); | |
977 | if (c != '\n') | |
978 | { | |
4af310db EZ |
979 | src--; |
980 | c = '\r'; | |
981 | } | |
982 | } | |
983 | *dst++ = c; | |
984 | coding->produced_char++; | |
985 | continue; | |
986 | } | |
987 | else if (*src == '\n') | |
988 | { | |
989 | if ((coding->eol_type == CODING_EOL_CR | |
990 | || coding->eol_type == CODING_EOL_CRLF) | |
991 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
992 | { | |
993 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
994 | goto label_end_of_loop; | |
995 | } | |
996 | *dst++ = *src++; | |
997 | coding->produced_char++; | |
998 | continue; | |
999 | } | |
3089d25c | 1000 | else if (*src == 0x80 && coding->cmp_data) |
aa72b389 KH |
1001 | { |
1002 | /* Start of composition data. */ | |
1003 | int consumed = decode_composition_emacs_mule (coding, src, src_end, | |
1004 | &dst, dst_end, | |
1005 | dst_bytes); | |
1006 | if (consumed < 0) | |
1007 | goto label_end_of_loop; | |
1008 | else if (consumed > 0) | |
1009 | { | |
1010 | src += consumed; | |
1011 | continue; | |
1012 | } | |
1013 | bytes = CHAR_STRING (*src, tmp); | |
1014 | p = tmp; | |
1015 | src++; | |
1016 | } | |
fd3ae0b9 KH |
1017 | else if (UNIBYTE_STR_AS_MULTIBYTE_P (src, src_end - src, bytes) |
1018 | || (coding->flags /* We are recovering a file. */ | |
1019 | && src[0] == LEADING_CODE_8_BIT_CONTROL | |
1020 | && ! CHAR_HEAD_P (src[1]))) | |
b73bfc1c KH |
1021 | { |
1022 | p = src; | |
1023 | src += bytes; | |
1024 | } | |
1025 | else | |
1026 | { | |
1027 | bytes = CHAR_STRING (*src, tmp); | |
1028 | p = tmp; | |
1029 | src++; | |
1030 | } | |
1031 | if (dst + bytes >= (dst_bytes ? dst_end : src)) | |
1032 | { | |
1033 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
4ed46869 KH |
1034 | break; |
1035 | } | |
b73bfc1c KH |
1036 | while (bytes--) *dst++ = *p++; |
1037 | coding->produced_char++; | |
4ed46869 | 1038 | } |
4af310db | 1039 | label_end_of_loop: |
b73bfc1c KH |
1040 | coding->consumed = coding->consumed_char = src_base - source; |
1041 | coding->produced = dst - destination; | |
4ed46869 KH |
1042 | } |
1043 | ||
b73bfc1c | 1044 | |
aa72b389 KH |
1045 | /* Encode composition data stored at DATA into a special byte sequence |
1046 | starting by 0x80. Update CODING->cmp_data_start and maybe | |
1047 | CODING->cmp_data for the next call. */ | |
1048 | ||
1049 | #define ENCODE_COMPOSITION_EMACS_MULE(coding, data) \ | |
1050 | do { \ | |
1051 | unsigned char buf[1024], *p0 = buf, *p; \ | |
1052 | int len = data[0]; \ | |
1053 | int i; \ | |
1054 | \ | |
1055 | buf[0] = 0x80; \ | |
1056 | buf[1] = 0xF0 + data[3]; /* METHOD */ \ | |
1057 | buf[3] = 0xA0 + (data[2] - data[1]); /* COMPOSED-CHARS */ \ | |
1058 | p = buf + 4; \ | |
1059 | if (data[3] == COMPOSITION_WITH_RULE \ | |
1060 | || data[3] == COMPOSITION_WITH_RULE_ALTCHARS) \ | |
1061 | { \ | |
1062 | p += CHAR_STRING (data[4], p); \ | |
1063 | for (i = 5; i < len; i += 2) \ | |
1064 | { \ | |
1065 | int gref, nref; \ | |
1066 | COMPOSITION_DECODE_RULE (data[i], gref, nref); \ | |
1067 | *p++ = 0x20 + gref; \ | |
1068 | *p++ = 0x20 + nref; \ | |
1069 | p += CHAR_STRING (data[i + 1], p); \ | |
1070 | } \ | |
1071 | } \ | |
1072 | else \ | |
1073 | { \ | |
1074 | for (i = 4; i < len; i++) \ | |
1075 | p += CHAR_STRING (data[i], p); \ | |
1076 | } \ | |
1077 | buf[2] = 0xA0 + (p - buf); /* COMPONENTS-BYTES */ \ | |
1078 | \ | |
1079 | if (dst + (p - buf) + 4 > (dst_bytes ? dst_end : src)) \ | |
1080 | { \ | |
1081 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
1082 | goto label_end_of_loop; \ | |
1083 | } \ | |
1084 | while (p0 < p) \ | |
1085 | *dst++ = *p0++; \ | |
1086 | coding->cmp_data_start += data[0]; \ | |
1087 | if (coding->cmp_data_start == coding->cmp_data->used \ | |
1088 | && coding->cmp_data->next) \ | |
1089 | { \ | |
1090 | coding->cmp_data = coding->cmp_data->next; \ | |
1091 | coding->cmp_data_start = 0; \ | |
1092 | } \ | |
1093 | } while (0) | |
93dec019 | 1094 | |
aa72b389 | 1095 | |
a4244313 | 1096 | static void encode_eol P_ ((struct coding_system *, const unsigned char *, |
aa72b389 KH |
1097 | unsigned char *, int, int)); |
1098 | ||
1099 | static void | |
1100 | encode_coding_emacs_mule (coding, source, destination, src_bytes, dst_bytes) | |
1101 | struct coding_system *coding; | |
1102 | unsigned char *source, *destination; | |
1103 | int src_bytes, dst_bytes; | |
1104 | { | |
1105 | unsigned char *src = source; | |
1106 | unsigned char *src_end = source + src_bytes; | |
1107 | unsigned char *dst = destination; | |
1108 | unsigned char *dst_end = destination + dst_bytes; | |
1109 | unsigned char *src_base; | |
1110 | int c; | |
1111 | int char_offset; | |
1112 | int *data; | |
1113 | ||
1114 | Lisp_Object translation_table; | |
1115 | ||
1116 | translation_table = Qnil; | |
1117 | ||
1118 | /* Optimization for the case that there's no composition. */ | |
1119 | if (!coding->cmp_data || coding->cmp_data->used == 0) | |
1120 | { | |
1121 | encode_eol (coding, source, destination, src_bytes, dst_bytes); | |
1122 | return; | |
1123 | } | |
1124 | ||
1125 | char_offset = coding->cmp_data->char_offset; | |
1126 | data = coding->cmp_data->data + coding->cmp_data_start; | |
1127 | while (1) | |
1128 | { | |
1129 | src_base = src; | |
1130 | ||
1131 | /* If SRC starts a composition, encode the information about the | |
1132 | composition in advance. */ | |
1133 | if (coding->cmp_data_start < coding->cmp_data->used | |
1134 | && char_offset + coding->consumed_char == data[1]) | |
1135 | { | |
1136 | ENCODE_COMPOSITION_EMACS_MULE (coding, data); | |
1137 | char_offset = coding->cmp_data->char_offset; | |
1138 | data = coding->cmp_data->data + coding->cmp_data_start; | |
1139 | } | |
1140 | ||
1141 | ONE_MORE_CHAR (c); | |
1142 | if (c == '\n' && (coding->eol_type == CODING_EOL_CRLF | |
1143 | || coding->eol_type == CODING_EOL_CR)) | |
1144 | { | |
1145 | if (coding->eol_type == CODING_EOL_CRLF) | |
1146 | EMIT_TWO_BYTES ('\r', c); | |
1147 | else | |
1148 | EMIT_ONE_BYTE ('\r'); | |
1149 | } | |
1150 | else if (SINGLE_BYTE_CHAR_P (c)) | |
fd3ae0b9 KH |
1151 | { |
1152 | if (coding->flags && ! ASCII_BYTE_P (c)) | |
1153 | { | |
1154 | /* As we are auto saving, retain the multibyte form for | |
1155 | 8-bit chars. */ | |
1156 | unsigned char buf[MAX_MULTIBYTE_LENGTH]; | |
1157 | int bytes = CHAR_STRING (c, buf); | |
1158 | ||
1159 | if (bytes == 1) | |
1160 | EMIT_ONE_BYTE (buf[0]); | |
1161 | else | |
1162 | EMIT_TWO_BYTES (buf[0], buf[1]); | |
1163 | } | |
1164 | else | |
1165 | EMIT_ONE_BYTE (c); | |
1166 | } | |
aa72b389 KH |
1167 | else |
1168 | EMIT_BYTES (src_base, src); | |
1169 | coding->consumed_char++; | |
1170 | } | |
1171 | label_end_of_loop: | |
1172 | coding->consumed = src_base - source; | |
1173 | coding->produced = coding->produced_char = dst - destination; | |
1174 | return; | |
1175 | } | |
b73bfc1c | 1176 | |
4ed46869 KH |
1177 | \f |
1178 | /*** 3. ISO2022 handlers ***/ | |
1179 | ||
1180 | /* The following note describes the coding system ISO2022 briefly. | |
39787efd | 1181 | Since the intention of this note is to help understand the |
cfb43547 | 1182 | functions in this file, some parts are NOT ACCURATE or are OVERLY |
39787efd | 1183 | SIMPLIFIED. For thorough understanding, please refer to the |
cfb43547 DL |
1184 | original document of ISO2022. This is equivalent to the standard |
1185 | ECMA-35, obtainable from <URL:http://www.ecma.ch/> (*). | |
4ed46869 KH |
1186 | |
1187 | ISO2022 provides many mechanisms to encode several character sets | |
cfb43547 | 1188 | in 7-bit and 8-bit environments. For 7-bit environments, all text |
39787efd KH |
1189 | is encoded using bytes less than 128. This may make the encoded |
1190 | text a little bit longer, but the text passes more easily through | |
cfb43547 | 1191 | several types of gateway, some of which strip off the MSB (Most |
8ca3766a | 1192 | Significant Bit). |
b73bfc1c | 1193 | |
cfb43547 DL |
1194 | There are two kinds of character sets: control character sets and |
1195 | graphic character sets. The former contain control characters such | |
4ed46869 | 1196 | as `newline' and `escape' to provide control functions (control |
39787efd | 1197 | functions are also provided by escape sequences). The latter |
cfb43547 | 1198 | contain graphic characters such as 'A' and '-'. Emacs recognizes |
4ed46869 KH |
1199 | two control character sets and many graphic character sets. |
1200 | ||
1201 | Graphic character sets are classified into one of the following | |
39787efd KH |
1202 | four classes, according to the number of bytes (DIMENSION) and |
1203 | number of characters in one dimension (CHARS) of the set: | |
1204 | - DIMENSION1_CHARS94 | |
1205 | - DIMENSION1_CHARS96 | |
1206 | - DIMENSION2_CHARS94 | |
1207 | - DIMENSION2_CHARS96 | |
1208 | ||
1209 | In addition, each character set is assigned an identification tag, | |
cfb43547 | 1210 | unique for each set, called the "final character" (denoted as <F> |
39787efd KH |
1211 | hereafter). The <F> of each character set is decided by ECMA(*) |
1212 | when it is registered in ISO. The code range of <F> is 0x30..0x7F | |
1213 | (0x30..0x3F are for private use only). | |
4ed46869 KH |
1214 | |
1215 | Note (*): ECMA = European Computer Manufacturers Association | |
1216 | ||
cfb43547 | 1217 | Here are examples of graphic character sets [NAME(<F>)]: |
4ed46869 KH |
1218 | o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ... |
1219 | o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ... | |
1220 | o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ... | |
1221 | o DIMENSION2_CHARS96 -- none for the moment | |
1222 | ||
39787efd | 1223 | A code area (1 byte=8 bits) is divided into 4 areas, C0, GL, C1, and GR. |
4ed46869 KH |
1224 | C0 [0x00..0x1F] -- control character plane 0 |
1225 | GL [0x20..0x7F] -- graphic character plane 0 | |
1226 | C1 [0x80..0x9F] -- control character plane 1 | |
1227 | GR [0xA0..0xFF] -- graphic character plane 1 | |
1228 | ||
1229 | A control character set is directly designated and invoked to C0 or | |
39787efd KH |
1230 | C1 by an escape sequence. The most common case is that: |
1231 | - ISO646's control character set is designated/invoked to C0, and | |
1232 | - ISO6429's control character set is designated/invoked to C1, | |
1233 | and usually these designations/invocations are omitted in encoded | |
1234 | text. In a 7-bit environment, only C0 can be used, and a control | |
1235 | character for C1 is encoded by an appropriate escape sequence to | |
1236 | fit into the environment. All control characters for C1 are | |
1237 | defined to have corresponding escape sequences. | |
4ed46869 KH |
1238 | |
1239 | A graphic character set is at first designated to one of four | |
1240 | graphic registers (G0 through G3), then these graphic registers are | |
1241 | invoked to GL or GR. These designations and invocations can be | |
1242 | done independently. The most common case is that G0 is invoked to | |
39787efd KH |
1243 | GL, G1 is invoked to GR, and ASCII is designated to G0. Usually |
1244 | these invocations and designations are omitted in encoded text. | |
1245 | In a 7-bit environment, only GL can be used. | |
4ed46869 | 1246 | |
39787efd KH |
1247 | When a graphic character set of CHARS94 is invoked to GL, codes |
1248 | 0x20 and 0x7F of the GL area work as control characters SPACE and | |
1249 | DEL respectively, and codes 0xA0 and 0xFF of the GR area should not | |
1250 | be used. | |
4ed46869 KH |
1251 | |
1252 | There are two ways of invocation: locking-shift and single-shift. | |
1253 | With locking-shift, the invocation lasts until the next different | |
39787efd KH |
1254 | invocation, whereas with single-shift, the invocation affects the |
1255 | following character only and doesn't affect the locking-shift | |
1256 | state. Invocations are done by the following control characters or | |
1257 | escape sequences: | |
4ed46869 KH |
1258 | |
1259 | ---------------------------------------------------------------------- | |
39787efd | 1260 | abbrev function cntrl escape seq description |
4ed46869 | 1261 | ---------------------------------------------------------------------- |
39787efd KH |
1262 | SI/LS0 (shift-in) 0x0F none invoke G0 into GL |
1263 | SO/LS1 (shift-out) 0x0E none invoke G1 into GL | |
1264 | LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL | |
1265 | LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL | |
1266 | LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*) | |
1267 | LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*) | |
1268 | LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*) | |
1269 | SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char | |
1270 | SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char | |
4ed46869 | 1271 | ---------------------------------------------------------------------- |
39787efd KH |
1272 | (*) These are not used by any known coding system. |
1273 | ||
1274 | Control characters for these functions are defined by macros | |
1275 | ISO_CODE_XXX in `coding.h'. | |
4ed46869 | 1276 | |
39787efd | 1277 | Designations are done by the following escape sequences: |
4ed46869 KH |
1278 | ---------------------------------------------------------------------- |
1279 | escape sequence description | |
1280 | ---------------------------------------------------------------------- | |
1281 | ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0 | |
1282 | ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1 | |
1283 | ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2 | |
1284 | ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3 | |
1285 | ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*) | |
1286 | ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1 | |
1287 | ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2 | |
1288 | ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3 | |
1289 | ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**) | |
1290 | ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1 | |
1291 | ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2 | |
1292 | ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3 | |
1293 | ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*) | |
1294 | ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1 | |
1295 | ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2 | |
1296 | ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3 | |
1297 | ---------------------------------------------------------------------- | |
1298 | ||
1299 | In this list, "DIMENSION1_CHARS94<F>" means a graphic character set | |
39787efd | 1300 | of dimension 1, chars 94, and final character <F>, etc... |
4ed46869 KH |
1301 | |
1302 | Note (*): Although these designations are not allowed in ISO2022, | |
1303 | Emacs accepts them on decoding, and produces them on encoding | |
39787efd | 1304 | CHARS96 character sets in a coding system which is characterized as |
4ed46869 KH |
1305 | 7-bit environment, non-locking-shift, and non-single-shift. |
1306 | ||
1307 | Note (**): If <F> is '@', 'A', or 'B', the intermediate character | |
39787efd | 1308 | '(' can be omitted. We refer to this as "short-form" hereafter. |
4ed46869 | 1309 | |
cfb43547 | 1310 | Now you may notice that there are a lot of ways of encoding the |
39787efd KH |
1311 | same multilingual text in ISO2022. Actually, there exist many |
1312 | coding systems such as Compound Text (used in X11's inter client | |
8ca3766a DL |
1313 | communication, ISO-2022-JP (used in Japanese Internet), ISO-2022-KR |
1314 | (used in Korean Internet), EUC (Extended UNIX Code, used in Asian | |
4ed46869 KH |
1315 | localized platforms), and all of these are variants of ISO2022. |
1316 | ||
1317 | In addition to the above, Emacs handles two more kinds of escape | |
1318 | sequences: ISO6429's direction specification and Emacs' private | |
1319 | sequence for specifying character composition. | |
1320 | ||
39787efd | 1321 | ISO6429's direction specification takes the following form: |
4ed46869 KH |
1322 | o CSI ']' -- end of the current direction |
1323 | o CSI '0' ']' -- end of the current direction | |
1324 | o CSI '1' ']' -- start of left-to-right text | |
1325 | o CSI '2' ']' -- start of right-to-left text | |
1326 | The control character CSI (0x9B: control sequence introducer) is | |
39787efd KH |
1327 | abbreviated to the escape sequence ESC '[' in a 7-bit environment. |
1328 | ||
1329 | Character composition specification takes the following form: | |
ec6d2bb8 KH |
1330 | o ESC '0' -- start relative composition |
1331 | o ESC '1' -- end composition | |
1332 | o ESC '2' -- start rule-base composition (*) | |
1333 | o ESC '3' -- start relative composition with alternate chars (**) | |
1334 | o ESC '4' -- start rule-base composition with alternate chars (**) | |
b73bfc1c | 1335 | Since these are not standard escape sequences of any ISO standard, |
cfb43547 | 1336 | the use of them with these meanings is restricted to Emacs only. |
ec6d2bb8 | 1337 | |
cfb43547 | 1338 | (*) This form is used only in Emacs 20.5 and older versions, |
b73bfc1c | 1339 | but the newer versions can safely decode it. |
cfb43547 | 1340 | (**) This form is used only in Emacs 21.1 and newer versions, |
b73bfc1c | 1341 | and the older versions can't decode it. |
ec6d2bb8 | 1342 | |
cfb43547 | 1343 | Here's a list of example usages of these composition escape |
b73bfc1c | 1344 | sequences (categorized by `enum composition_method'). |
ec6d2bb8 | 1345 | |
b73bfc1c | 1346 | COMPOSITION_RELATIVE: |
ec6d2bb8 | 1347 | ESC 0 CHAR [ CHAR ] ESC 1 |
8ca3766a | 1348 | COMPOSITION_WITH_RULE: |
ec6d2bb8 | 1349 | ESC 2 CHAR [ RULE CHAR ] ESC 1 |
b73bfc1c | 1350 | COMPOSITION_WITH_ALTCHARS: |
ec6d2bb8 | 1351 | ESC 3 ALTCHAR [ ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 |
b73bfc1c | 1352 | COMPOSITION_WITH_RULE_ALTCHARS: |
ec6d2bb8 | 1353 | ESC 4 ALTCHAR [ RULE ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 */ |
4ed46869 KH |
1354 | |
1355 | enum iso_code_class_type iso_code_class[256]; | |
1356 | ||
05e6f5dc KH |
1357 | #define CHARSET_OK(idx, charset, c) \ |
1358 | (coding_system_table[idx] \ | |
1359 | && (charset == CHARSET_ASCII \ | |
6b89e3aa | 1360 | || (safe_chars = coding_safe_chars (coding_system_table[idx]->symbol), \ |
05e6f5dc KH |
1361 | CODING_SAFE_CHAR_P (safe_chars, c))) \ |
1362 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding_system_table[idx], \ | |
1363 | charset) \ | |
1364 | != CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION)) | |
d46c5b12 KH |
1365 | |
1366 | #define SHIFT_OUT_OK(idx) \ | |
1367 | (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding_system_table[idx], 1) >= 0) | |
1368 | ||
b6871cc7 KH |
1369 | #define COMPOSITION_OK(idx) \ |
1370 | (coding_system_table[idx]->composing != COMPOSITION_DISABLED) | |
1371 | ||
4ed46869 | 1372 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
cfb43547 | 1373 | Check if a text is encoded in ISO2022. If it is, return an |
4ed46869 KH |
1374 | integer in which appropriate flag bits any of: |
1375 | CODING_CATEGORY_MASK_ISO_7 | |
d46c5b12 | 1376 | CODING_CATEGORY_MASK_ISO_7_TIGHT |
4ed46869 KH |
1377 | CODING_CATEGORY_MASK_ISO_8_1 |
1378 | CODING_CATEGORY_MASK_ISO_8_2 | |
7717c392 KH |
1379 | CODING_CATEGORY_MASK_ISO_7_ELSE |
1380 | CODING_CATEGORY_MASK_ISO_8_ELSE | |
4ed46869 KH |
1381 | are set. If a code which should never appear in ISO2022 is found, |
1382 | returns 0. */ | |
1383 | ||
0a28aafb KH |
1384 | static int |
1385 | detect_coding_iso2022 (src, src_end, multibytep) | |
4ed46869 | 1386 | unsigned char *src, *src_end; |
0a28aafb | 1387 | int multibytep; |
4ed46869 | 1388 | { |
d46c5b12 KH |
1389 | int mask = CODING_CATEGORY_MASK_ISO; |
1390 | int mask_found = 0; | |
f46869e4 | 1391 | int reg[4], shift_out = 0, single_shifting = 0; |
da55a2b7 | 1392 | int c, c1, charset; |
b73bfc1c KH |
1393 | /* Dummy for ONE_MORE_BYTE. */ |
1394 | struct coding_system dummy_coding; | |
1395 | struct coding_system *coding = &dummy_coding; | |
05e6f5dc | 1396 | Lisp_Object safe_chars; |
3f003981 | 1397 | |
d46c5b12 | 1398 | reg[0] = CHARSET_ASCII, reg[1] = reg[2] = reg[3] = -1; |
3f003981 | 1399 | while (mask && src < src_end) |
4ed46869 | 1400 | { |
0a28aafb | 1401 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
8d239c89 | 1402 | retry: |
4ed46869 KH |
1403 | switch (c) |
1404 | { | |
1405 | case ISO_CODE_ESC: | |
74383408 KH |
1406 | if (inhibit_iso_escape_detection) |
1407 | break; | |
f46869e4 | 1408 | single_shifting = 0; |
0a28aafb | 1409 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
d46c5b12 | 1410 | if (c >= '(' && c <= '/') |
4ed46869 | 1411 | { |
bf9cdd4e | 1412 | /* Designation sequence for a charset of dimension 1. */ |
0a28aafb | 1413 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
d46c5b12 KH |
1414 | if (c1 < ' ' || c1 >= 0x80 |
1415 | || (charset = iso_charset_table[0][c >= ','][c1]) < 0) | |
1416 | /* Invalid designation sequence. Just ignore. */ | |
1417 | break; | |
1418 | reg[(c - '(') % 4] = charset; | |
bf9cdd4e KH |
1419 | } |
1420 | else if (c == '$') | |
1421 | { | |
1422 | /* Designation sequence for a charset of dimension 2. */ | |
0a28aafb | 1423 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
bf9cdd4e KH |
1424 | if (c >= '@' && c <= 'B') |
1425 | /* Designation for JISX0208.1978, GB2312, or JISX0208. */ | |
d46c5b12 | 1426 | reg[0] = charset = iso_charset_table[1][0][c]; |
bf9cdd4e | 1427 | else if (c >= '(' && c <= '/') |
bcf26d6a | 1428 | { |
0a28aafb | 1429 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
d46c5b12 KH |
1430 | if (c1 < ' ' || c1 >= 0x80 |
1431 | || (charset = iso_charset_table[1][c >= ','][c1]) < 0) | |
1432 | /* Invalid designation sequence. Just ignore. */ | |
1433 | break; | |
1434 | reg[(c - '(') % 4] = charset; | |
bcf26d6a | 1435 | } |
bf9cdd4e | 1436 | else |
d46c5b12 KH |
1437 | /* Invalid designation sequence. Just ignore. */ |
1438 | break; | |
1439 | } | |
ae9ff118 | 1440 | else if (c == 'N' || c == 'O') |
d46c5b12 | 1441 | { |
ae9ff118 KH |
1442 | /* ESC <Fe> for SS2 or SS3. */ |
1443 | mask &= CODING_CATEGORY_MASK_ISO_7_ELSE; | |
d46c5b12 | 1444 | break; |
4ed46869 | 1445 | } |
ec6d2bb8 KH |
1446 | else if (c >= '0' && c <= '4') |
1447 | { | |
1448 | /* ESC <Fp> for start/end composition. */ | |
b6871cc7 KH |
1449 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_7)) |
1450 | mask_found |= CODING_CATEGORY_MASK_ISO_7; | |
1451 | else | |
1452 | mask &= ~CODING_CATEGORY_MASK_ISO_7; | |
1453 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_7_TIGHT)) | |
1454 | mask_found |= CODING_CATEGORY_MASK_ISO_7_TIGHT; | |
1455 | else | |
1456 | mask &= ~CODING_CATEGORY_MASK_ISO_7_TIGHT; | |
1457 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_8_1)) | |
1458 | mask_found |= CODING_CATEGORY_MASK_ISO_8_1; | |
1459 | else | |
1460 | mask &= ~CODING_CATEGORY_MASK_ISO_8_1; | |
1461 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_8_2)) | |
1462 | mask_found |= CODING_CATEGORY_MASK_ISO_8_2; | |
1463 | else | |
1464 | mask &= ~CODING_CATEGORY_MASK_ISO_8_2; | |
1465 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_7_ELSE)) | |
1466 | mask_found |= CODING_CATEGORY_MASK_ISO_7_ELSE; | |
1467 | else | |
1468 | mask &= ~CODING_CATEGORY_MASK_ISO_7_ELSE; | |
1469 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_8_ELSE)) | |
1470 | mask_found |= CODING_CATEGORY_MASK_ISO_8_ELSE; | |
1471 | else | |
1472 | mask &= ~CODING_CATEGORY_MASK_ISO_8_ELSE; | |
ec6d2bb8 KH |
1473 | break; |
1474 | } | |
bf9cdd4e | 1475 | else |
d46c5b12 KH |
1476 | /* Invalid escape sequence. Just ignore. */ |
1477 | break; | |
1478 | ||
1479 | /* We found a valid designation sequence for CHARSET. */ | |
1480 | mask &= ~CODING_CATEGORY_MASK_ISO_8BIT; | |
05e6f5dc KH |
1481 | c = MAKE_CHAR (charset, 0, 0); |
1482 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7, charset, c)) | |
d46c5b12 KH |
1483 | mask_found |= CODING_CATEGORY_MASK_ISO_7; |
1484 | else | |
1485 | mask &= ~CODING_CATEGORY_MASK_ISO_7; | |
05e6f5dc | 1486 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_TIGHT, charset, c)) |
d46c5b12 KH |
1487 | mask_found |= CODING_CATEGORY_MASK_ISO_7_TIGHT; |
1488 | else | |
1489 | mask &= ~CODING_CATEGORY_MASK_ISO_7_TIGHT; | |
05e6f5dc | 1490 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_ELSE, charset, c)) |
ae9ff118 KH |
1491 | mask_found |= CODING_CATEGORY_MASK_ISO_7_ELSE; |
1492 | else | |
d46c5b12 | 1493 | mask &= ~CODING_CATEGORY_MASK_ISO_7_ELSE; |
05e6f5dc | 1494 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_8_ELSE, charset, c)) |
ae9ff118 KH |
1495 | mask_found |= CODING_CATEGORY_MASK_ISO_8_ELSE; |
1496 | else | |
d46c5b12 | 1497 | mask &= ~CODING_CATEGORY_MASK_ISO_8_ELSE; |
4ed46869 KH |
1498 | break; |
1499 | ||
4ed46869 | 1500 | case ISO_CODE_SO: |
74383408 KH |
1501 | if (inhibit_iso_escape_detection) |
1502 | break; | |
f46869e4 | 1503 | single_shifting = 0; |
d46c5b12 KH |
1504 | if (shift_out == 0 |
1505 | && (reg[1] >= 0 | |
1506 | || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_7_ELSE) | |
1507 | || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_8_ELSE))) | |
1508 | { | |
1509 | /* Locking shift out. */ | |
1510 | mask &= ~CODING_CATEGORY_MASK_ISO_7BIT; | |
1511 | mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT; | |
1512 | } | |
e0e989f6 | 1513 | break; |
93dec019 | 1514 | |
d46c5b12 | 1515 | case ISO_CODE_SI: |
74383408 KH |
1516 | if (inhibit_iso_escape_detection) |
1517 | break; | |
f46869e4 | 1518 | single_shifting = 0; |
d46c5b12 KH |
1519 | if (shift_out == 1) |
1520 | { | |
1521 | /* Locking shift in. */ | |
1522 | mask &= ~CODING_CATEGORY_MASK_ISO_7BIT; | |
1523 | mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT; | |
1524 | } | |
1525 | break; | |
1526 | ||
4ed46869 | 1527 | case ISO_CODE_CSI: |
f46869e4 | 1528 | single_shifting = 0; |
4ed46869 KH |
1529 | case ISO_CODE_SS2: |
1530 | case ISO_CODE_SS3: | |
3f003981 KH |
1531 | { |
1532 | int newmask = CODING_CATEGORY_MASK_ISO_8_ELSE; | |
1533 | ||
74383408 KH |
1534 | if (inhibit_iso_escape_detection) |
1535 | break; | |
70c22245 KH |
1536 | if (c != ISO_CODE_CSI) |
1537 | { | |
d46c5b12 KH |
1538 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1539 | & CODING_FLAG_ISO_SINGLE_SHIFT) | |
70c22245 | 1540 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1541 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1542 | & CODING_FLAG_ISO_SINGLE_SHIFT) | |
70c22245 | 1543 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
f46869e4 | 1544 | single_shifting = 1; |
70c22245 | 1545 | } |
3f003981 KH |
1546 | if (VECTORP (Vlatin_extra_code_table) |
1547 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
1548 | { | |
d46c5b12 KH |
1549 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1550 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 | 1551 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1552 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1553 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 KH |
1554 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
1555 | } | |
1556 | mask &= newmask; | |
d46c5b12 | 1557 | mask_found |= newmask; |
3f003981 KH |
1558 | } |
1559 | break; | |
4ed46869 KH |
1560 | |
1561 | default: | |
1562 | if (c < 0x80) | |
f46869e4 KH |
1563 | { |
1564 | single_shifting = 0; | |
1565 | break; | |
1566 | } | |
4ed46869 | 1567 | else if (c < 0xA0) |
c4825358 | 1568 | { |
f46869e4 | 1569 | single_shifting = 0; |
3f003981 KH |
1570 | if (VECTORP (Vlatin_extra_code_table) |
1571 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
c4825358 | 1572 | { |
3f003981 KH |
1573 | int newmask = 0; |
1574 | ||
d46c5b12 KH |
1575 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1576 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 | 1577 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1578 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1579 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 KH |
1580 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
1581 | mask &= newmask; | |
d46c5b12 | 1582 | mask_found |= newmask; |
c4825358 | 1583 | } |
3f003981 KH |
1584 | else |
1585 | return 0; | |
c4825358 | 1586 | } |
4ed46869 KH |
1587 | else |
1588 | { | |
d46c5b12 | 1589 | mask &= ~(CODING_CATEGORY_MASK_ISO_7BIT |
7717c392 | 1590 | | CODING_CATEGORY_MASK_ISO_7_ELSE); |
d46c5b12 | 1591 | mask_found |= CODING_CATEGORY_MASK_ISO_8_1; |
f46869e4 KH |
1592 | /* Check the length of succeeding codes of the range |
1593 | 0xA0..0FF. If the byte length is odd, we exclude | |
1594 | CODING_CATEGORY_MASK_ISO_8_2. We can check this only | |
1595 | when we are not single shifting. */ | |
b73bfc1c KH |
1596 | if (!single_shifting |
1597 | && mask & CODING_CATEGORY_MASK_ISO_8_2) | |
f46869e4 | 1598 | { |
e17de821 | 1599 | int i = 1; |
8d239c89 KH |
1600 | |
1601 | c = -1; | |
b73bfc1c KH |
1602 | while (src < src_end) |
1603 | { | |
0a28aafb | 1604 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
b73bfc1c KH |
1605 | if (c < 0xA0) |
1606 | break; | |
1607 | i++; | |
1608 | } | |
1609 | ||
1610 | if (i & 1 && src < src_end) | |
f46869e4 KH |
1611 | mask &= ~CODING_CATEGORY_MASK_ISO_8_2; |
1612 | else | |
1613 | mask_found |= CODING_CATEGORY_MASK_ISO_8_2; | |
8d239c89 KH |
1614 | if (c >= 0) |
1615 | /* This means that we have read one extra byte. */ | |
1616 | goto retry; | |
f46869e4 | 1617 | } |
4ed46869 KH |
1618 | } |
1619 | break; | |
1620 | } | |
1621 | } | |
b73bfc1c | 1622 | label_end_of_loop: |
d46c5b12 | 1623 | return (mask & mask_found); |
4ed46869 KH |
1624 | } |
1625 | ||
b73bfc1c KH |
1626 | /* Decode a character of which charset is CHARSET, the 1st position |
1627 | code is C1, the 2nd position code is C2, and return the decoded | |
1628 | character code. If the variable `translation_table' is non-nil, | |
1629 | returned the translated code. */ | |
ec6d2bb8 | 1630 | |
b73bfc1c KH |
1631 | #define DECODE_ISO_CHARACTER(charset, c1, c2) \ |
1632 | (NILP (translation_table) \ | |
1633 | ? MAKE_CHAR (charset, c1, c2) \ | |
1634 | : translate_char (translation_table, -1, charset, c1, c2)) | |
4ed46869 KH |
1635 | |
1636 | /* Set designation state into CODING. */ | |
d46c5b12 KH |
1637 | #define DECODE_DESIGNATION(reg, dimension, chars, final_char) \ |
1638 | do { \ | |
05e6f5dc | 1639 | int charset, c; \ |
944bd420 KH |
1640 | \ |
1641 | if (final_char < '0' || final_char >= 128) \ | |
1642 | goto label_invalid_code; \ | |
1643 | charset = ISO_CHARSET_TABLE (make_number (dimension), \ | |
1644 | make_number (chars), \ | |
1645 | make_number (final_char)); \ | |
05e6f5dc | 1646 | c = MAKE_CHAR (charset, 0, 0); \ |
d46c5b12 | 1647 | if (charset >= 0 \ |
704c5781 | 1648 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) == reg \ |
05e6f5dc | 1649 | || CODING_SAFE_CHAR_P (safe_chars, c))) \ |
d46c5b12 KH |
1650 | { \ |
1651 | if (coding->spec.iso2022.last_invalid_designation_register == 0 \ | |
1652 | && reg == 0 \ | |
1653 | && charset == CHARSET_ASCII) \ | |
1654 | { \ | |
1655 | /* We should insert this designation sequence as is so \ | |
1656 | that it is surely written back to a file. */ \ | |
1657 | coding->spec.iso2022.last_invalid_designation_register = -1; \ | |
1658 | goto label_invalid_code; \ | |
1659 | } \ | |
1660 | coding->spec.iso2022.last_invalid_designation_register = -1; \ | |
1661 | if ((coding->mode & CODING_MODE_DIRECTION) \ | |
1662 | && CHARSET_REVERSE_CHARSET (charset) >= 0) \ | |
1663 | charset = CHARSET_REVERSE_CHARSET (charset); \ | |
1664 | CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \ | |
1665 | } \ | |
1666 | else \ | |
1667 | { \ | |
1668 | coding->spec.iso2022.last_invalid_designation_register = reg; \ | |
1669 | goto label_invalid_code; \ | |
1670 | } \ | |
4ed46869 KH |
1671 | } while (0) |
1672 | ||
ec6d2bb8 KH |
1673 | /* Allocate a memory block for storing information about compositions. |
1674 | The block is chained to the already allocated blocks. */ | |
d46c5b12 | 1675 | |
33fb63eb | 1676 | void |
ec6d2bb8 | 1677 | coding_allocate_composition_data (coding, char_offset) |
d46c5b12 | 1678 | struct coding_system *coding; |
ec6d2bb8 | 1679 | int char_offset; |
d46c5b12 | 1680 | { |
ec6d2bb8 KH |
1681 | struct composition_data *cmp_data |
1682 | = (struct composition_data *) xmalloc (sizeof *cmp_data); | |
1683 | ||
1684 | cmp_data->char_offset = char_offset; | |
1685 | cmp_data->used = 0; | |
1686 | cmp_data->prev = coding->cmp_data; | |
1687 | cmp_data->next = NULL; | |
1688 | if (coding->cmp_data) | |
1689 | coding->cmp_data->next = cmp_data; | |
1690 | coding->cmp_data = cmp_data; | |
1691 | coding->cmp_data_start = 0; | |
1692 | } | |
d46c5b12 | 1693 | |
aa72b389 KH |
1694 | /* Handle composition start sequence ESC 0, ESC 2, ESC 3, or ESC 4. |
1695 | ESC 0 : relative composition : ESC 0 CHAR ... ESC 1 | |
1696 | ESC 2 : rulebase composition : ESC 2 CHAR RULE CHAR RULE ... CHAR ESC 1 | |
1697 | ESC 3 : altchar composition : ESC 3 ALT ... ESC 0 CHAR ... ESC 1 | |
1698 | ESC 4 : alt&rule composition : ESC 4 ALT RULE .. ALT ESC 0 CHAR ... ESC 1 | |
1699 | */ | |
ec6d2bb8 | 1700 | |
33fb63eb KH |
1701 | #define DECODE_COMPOSITION_START(c1) \ |
1702 | do { \ | |
1703 | if (coding->composing == COMPOSITION_DISABLED) \ | |
1704 | { \ | |
1705 | *dst++ = ISO_CODE_ESC; \ | |
1706 | *dst++ = c1 & 0x7f; \ | |
1707 | coding->produced_char += 2; \ | |
1708 | } \ | |
1709 | else if (!COMPOSING_P (coding)) \ | |
1710 | { \ | |
1711 | /* This is surely the start of a composition. We must be sure \ | |
1712 | that coding->cmp_data has enough space to store the \ | |
1713 | information about the composition. If not, terminate the \ | |
1714 | current decoding loop, allocate one more memory block for \ | |
8ca3766a | 1715 | coding->cmp_data in the caller, then start the decoding \ |
33fb63eb KH |
1716 | loop again. We can't allocate memory here directly because \ |
1717 | it may cause buffer/string relocation. */ \ | |
1718 | if (!coding->cmp_data \ | |
1719 | || (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH \ | |
1720 | >= COMPOSITION_DATA_SIZE)) \ | |
1721 | { \ | |
1722 | coding->result = CODING_FINISH_INSUFFICIENT_CMP; \ | |
1723 | goto label_end_of_loop; \ | |
1724 | } \ | |
1725 | coding->composing = (c1 == '0' ? COMPOSITION_RELATIVE \ | |
1726 | : c1 == '2' ? COMPOSITION_WITH_RULE \ | |
1727 | : c1 == '3' ? COMPOSITION_WITH_ALTCHARS \ | |
1728 | : COMPOSITION_WITH_RULE_ALTCHARS); \ | |
1729 | CODING_ADD_COMPOSITION_START (coding, coding->produced_char, \ | |
1730 | coding->composing); \ | |
1731 | coding->composition_rule_follows = 0; \ | |
1732 | } \ | |
1733 | else \ | |
1734 | { \ | |
1735 | /* We are already handling a composition. If the method is \ | |
1736 | the following two, the codes following the current escape \ | |
1737 | sequence are actual characters stored in a buffer. */ \ | |
1738 | if (coding->composing == COMPOSITION_WITH_ALTCHARS \ | |
1739 | || coding->composing == COMPOSITION_WITH_RULE_ALTCHARS) \ | |
1740 | { \ | |
1741 | coding->composing = COMPOSITION_RELATIVE; \ | |
1742 | coding->composition_rule_follows = 0; \ | |
1743 | } \ | |
1744 | } \ | |
ec6d2bb8 KH |
1745 | } while (0) |
1746 | ||
8ca3766a | 1747 | /* Handle composition end sequence ESC 1. */ |
ec6d2bb8 KH |
1748 | |
1749 | #define DECODE_COMPOSITION_END(c1) \ | |
1750 | do { \ | |
93dec019 | 1751 | if (! COMPOSING_P (coding)) \ |
ec6d2bb8 KH |
1752 | { \ |
1753 | *dst++ = ISO_CODE_ESC; \ | |
1754 | *dst++ = c1; \ | |
1755 | coding->produced_char += 2; \ | |
1756 | } \ | |
1757 | else \ | |
1758 | { \ | |
1759 | CODING_ADD_COMPOSITION_END (coding, coding->produced_char); \ | |
1760 | coding->composing = COMPOSITION_NO; \ | |
1761 | } \ | |
1762 | } while (0) | |
1763 | ||
1764 | /* Decode a composition rule from the byte C1 (and maybe one more byte | |
1765 | from SRC) and store one encoded composition rule in | |
1766 | coding->cmp_data. */ | |
1767 | ||
1768 | #define DECODE_COMPOSITION_RULE(c1) \ | |
1769 | do { \ | |
1770 | int rule = 0; \ | |
1771 | (c1) -= 32; \ | |
1772 | if (c1 < 81) /* old format (before ver.21) */ \ | |
1773 | { \ | |
1774 | int gref = (c1) / 9; \ | |
1775 | int nref = (c1) % 9; \ | |
1776 | if (gref == 4) gref = 10; \ | |
1777 | if (nref == 4) nref = 10; \ | |
1778 | rule = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
1779 | } \ | |
b73bfc1c | 1780 | else if (c1 < 93) /* new format (after ver.21) */ \ |
ec6d2bb8 KH |
1781 | { \ |
1782 | ONE_MORE_BYTE (c2); \ | |
1783 | rule = COMPOSITION_ENCODE_RULE (c1 - 81, c2 - 32); \ | |
1784 | } \ | |
1785 | CODING_ADD_COMPOSITION_COMPONENT (coding, rule); \ | |
1786 | coding->composition_rule_follows = 0; \ | |
1787 | } while (0) | |
88993dfd | 1788 | |
d46c5b12 | 1789 | |
4ed46869 KH |
1790 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
1791 | ||
b73bfc1c | 1792 | static void |
d46c5b12 | 1793 | decode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
1794 | struct coding_system *coding; |
1795 | unsigned char *source, *destination; | |
1796 | int src_bytes, dst_bytes; | |
4ed46869 KH |
1797 | { |
1798 | unsigned char *src = source; | |
1799 | unsigned char *src_end = source + src_bytes; | |
1800 | unsigned char *dst = destination; | |
1801 | unsigned char *dst_end = destination + dst_bytes; | |
4ed46869 KH |
1802 | /* Charsets invoked to graphic plane 0 and 1 respectively. */ |
1803 | int charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
1804 | int charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
b73bfc1c KH |
1805 | /* SRC_BASE remembers the start position in source in each loop. |
1806 | The loop will be exited when there's not enough source code | |
1807 | (within macro ONE_MORE_BYTE), or when there's not enough | |
1808 | destination area to produce a character (within macro | |
1809 | EMIT_CHAR). */ | |
1810 | unsigned char *src_base; | |
1811 | int c, charset; | |
1812 | Lisp_Object translation_table; | |
05e6f5dc KH |
1813 | Lisp_Object safe_chars; |
1814 | ||
6b89e3aa | 1815 | safe_chars = coding_safe_chars (coding->symbol); |
bdd9fb48 | 1816 | |
b73bfc1c KH |
1817 | if (NILP (Venable_character_translation)) |
1818 | translation_table = Qnil; | |
1819 | else | |
1820 | { | |
1821 | translation_table = coding->translation_table_for_decode; | |
1822 | if (NILP (translation_table)) | |
1823 | translation_table = Vstandard_translation_table_for_decode; | |
1824 | } | |
4ed46869 | 1825 | |
b73bfc1c KH |
1826 | coding->result = CODING_FINISH_NORMAL; |
1827 | ||
1828 | while (1) | |
4ed46869 | 1829 | { |
85478bc6 | 1830 | int c1, c2 = 0; |
b73bfc1c KH |
1831 | |
1832 | src_base = src; | |
1833 | ONE_MORE_BYTE (c1); | |
4ed46869 | 1834 | |
ec6d2bb8 | 1835 | /* We produce no character or one character. */ |
4ed46869 KH |
1836 | switch (iso_code_class [c1]) |
1837 | { | |
1838 | case ISO_0x20_or_0x7F: | |
ec6d2bb8 KH |
1839 | if (COMPOSING_P (coding) && coding->composition_rule_follows) |
1840 | { | |
1841 | DECODE_COMPOSITION_RULE (c1); | |
b73bfc1c | 1842 | continue; |
ec6d2bb8 KH |
1843 | } |
1844 | if (charset0 < 0 || CHARSET_CHARS (charset0) == 94) | |
4ed46869 KH |
1845 | { |
1846 | /* This is SPACE or DEL. */ | |
b73bfc1c | 1847 | charset = CHARSET_ASCII; |
4ed46869 KH |
1848 | break; |
1849 | } | |
1850 | /* This is a graphic character, we fall down ... */ | |
1851 | ||
1852 | case ISO_graphic_plane_0: | |
ec6d2bb8 | 1853 | if (COMPOSING_P (coding) && coding->composition_rule_follows) |
b73bfc1c KH |
1854 | { |
1855 | DECODE_COMPOSITION_RULE (c1); | |
1856 | continue; | |
1857 | } | |
1858 | charset = charset0; | |
4ed46869 KH |
1859 | break; |
1860 | ||
1861 | case ISO_0xA0_or_0xFF: | |
d46c5b12 KH |
1862 | if (charset1 < 0 || CHARSET_CHARS (charset1) == 94 |
1863 | || coding->flags & CODING_FLAG_ISO_SEVEN_BITS) | |
fb88bf2d | 1864 | goto label_invalid_code; |
4ed46869 KH |
1865 | /* This is a graphic character, we fall down ... */ |
1866 | ||
1867 | case ISO_graphic_plane_1: | |
b73bfc1c | 1868 | if (charset1 < 0) |
fb88bf2d | 1869 | goto label_invalid_code; |
b73bfc1c | 1870 | charset = charset1; |
4ed46869 KH |
1871 | break; |
1872 | ||
b73bfc1c | 1873 | case ISO_control_0: |
ec6d2bb8 KH |
1874 | if (COMPOSING_P (coding)) |
1875 | DECODE_COMPOSITION_END ('1'); | |
1876 | ||
4ed46869 KH |
1877 | /* All ISO2022 control characters in this class have the |
1878 | same representation in Emacs internal format. */ | |
d46c5b12 KH |
1879 | if (c1 == '\n' |
1880 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
1881 | && (coding->eol_type == CODING_EOL_CR | |
1882 | || coding->eol_type == CODING_EOL_CRLF)) | |
1883 | { | |
b73bfc1c KH |
1884 | coding->result = CODING_FINISH_INCONSISTENT_EOL; |
1885 | goto label_end_of_loop; | |
d46c5b12 | 1886 | } |
b73bfc1c | 1887 | charset = CHARSET_ASCII; |
4ed46869 KH |
1888 | break; |
1889 | ||
b73bfc1c KH |
1890 | case ISO_control_1: |
1891 | if (COMPOSING_P (coding)) | |
1892 | DECODE_COMPOSITION_END ('1'); | |
1893 | goto label_invalid_code; | |
1894 | ||
4ed46869 | 1895 | case ISO_carriage_return: |
ec6d2bb8 KH |
1896 | if (COMPOSING_P (coding)) |
1897 | DECODE_COMPOSITION_END ('1'); | |
1898 | ||
4ed46869 | 1899 | if (coding->eol_type == CODING_EOL_CR) |
b73bfc1c | 1900 | c1 = '\n'; |
4ed46869 KH |
1901 | else if (coding->eol_type == CODING_EOL_CRLF) |
1902 | { | |
1903 | ONE_MORE_BYTE (c1); | |
b73bfc1c | 1904 | if (c1 != ISO_CODE_LF) |
4ed46869 KH |
1905 | { |
1906 | src--; | |
b73bfc1c | 1907 | c1 = '\r'; |
4ed46869 KH |
1908 | } |
1909 | } | |
b73bfc1c | 1910 | charset = CHARSET_ASCII; |
4ed46869 KH |
1911 | break; |
1912 | ||
1913 | case ISO_shift_out: | |
d46c5b12 KH |
1914 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1915 | || CODING_SPEC_ISO_DESIGNATION (coding, 1) < 0) | |
1916 | goto label_invalid_code; | |
4ed46869 KH |
1917 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 1; |
1918 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
b73bfc1c | 1919 | continue; |
4ed46869 KH |
1920 | |
1921 | case ISO_shift_in: | |
d46c5b12 KH |
1922 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)) |
1923 | goto label_invalid_code; | |
4ed46869 KH |
1924 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; |
1925 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
b73bfc1c | 1926 | continue; |
4ed46869 KH |
1927 | |
1928 | case ISO_single_shift_2_7: | |
1929 | case ISO_single_shift_2: | |
d46c5b12 KH |
1930 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
1931 | goto label_invalid_code; | |
4ed46869 KH |
1932 | /* SS2 is handled as an escape sequence of ESC 'N' */ |
1933 | c1 = 'N'; | |
1934 | goto label_escape_sequence; | |
1935 | ||
1936 | case ISO_single_shift_3: | |
d46c5b12 KH |
1937 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
1938 | goto label_invalid_code; | |
4ed46869 KH |
1939 | /* SS2 is handled as an escape sequence of ESC 'O' */ |
1940 | c1 = 'O'; | |
1941 | goto label_escape_sequence; | |
1942 | ||
1943 | case ISO_control_sequence_introducer: | |
1944 | /* CSI is handled as an escape sequence of ESC '[' ... */ | |
1945 | c1 = '['; | |
1946 | goto label_escape_sequence; | |
1947 | ||
1948 | case ISO_escape: | |
1949 | ONE_MORE_BYTE (c1); | |
1950 | label_escape_sequence: | |
1951 | /* Escape sequences handled by Emacs are invocation, | |
1952 | designation, direction specification, and character | |
1953 | composition specification. */ | |
1954 | switch (c1) | |
1955 | { | |
1956 | case '&': /* revision of following character set */ | |
1957 | ONE_MORE_BYTE (c1); | |
1958 | if (!(c1 >= '@' && c1 <= '~')) | |
d46c5b12 | 1959 | goto label_invalid_code; |
4ed46869 KH |
1960 | ONE_MORE_BYTE (c1); |
1961 | if (c1 != ISO_CODE_ESC) | |
d46c5b12 | 1962 | goto label_invalid_code; |
4ed46869 KH |
1963 | ONE_MORE_BYTE (c1); |
1964 | goto label_escape_sequence; | |
1965 | ||
1966 | case '$': /* designation of 2-byte character set */ | |
d46c5b12 KH |
1967 | if (! (coding->flags & CODING_FLAG_ISO_DESIGNATION)) |
1968 | goto label_invalid_code; | |
4ed46869 KH |
1969 | ONE_MORE_BYTE (c1); |
1970 | if (c1 >= '@' && c1 <= 'B') | |
1971 | { /* designation of JISX0208.1978, GB2312.1980, | |
88993dfd | 1972 | or JISX0208.1980 */ |
4ed46869 KH |
1973 | DECODE_DESIGNATION (0, 2, 94, c1); |
1974 | } | |
1975 | else if (c1 >= 0x28 && c1 <= 0x2B) | |
1976 | { /* designation of DIMENSION2_CHARS94 character set */ | |
1977 | ONE_MORE_BYTE (c2); | |
1978 | DECODE_DESIGNATION (c1 - 0x28, 2, 94, c2); | |
1979 | } | |
1980 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
1981 | { /* designation of DIMENSION2_CHARS96 character set */ | |
1982 | ONE_MORE_BYTE (c2); | |
1983 | DECODE_DESIGNATION (c1 - 0x2C, 2, 96, c2); | |
1984 | } | |
1985 | else | |
d46c5b12 | 1986 | goto label_invalid_code; |
b73bfc1c KH |
1987 | /* We must update these variables now. */ |
1988 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
1989 | charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
1990 | continue; | |
4ed46869 KH |
1991 | |
1992 | case 'n': /* invocation of locking-shift-2 */ | |
d46c5b12 KH |
1993 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1994 | || CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0) | |
1995 | goto label_invalid_code; | |
4ed46869 | 1996 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 2; |
e0e989f6 | 1997 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); |
b73bfc1c | 1998 | continue; |
4ed46869 KH |
1999 | |
2000 | case 'o': /* invocation of locking-shift-3 */ | |
d46c5b12 KH |
2001 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
2002 | || CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0) | |
2003 | goto label_invalid_code; | |
4ed46869 | 2004 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 3; |
e0e989f6 | 2005 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); |
b73bfc1c | 2006 | continue; |
4ed46869 KH |
2007 | |
2008 | case 'N': /* invocation of single-shift-2 */ | |
d46c5b12 KH |
2009 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) |
2010 | || CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0) | |
2011 | goto label_invalid_code; | |
4ed46869 | 2012 | charset = CODING_SPEC_ISO_DESIGNATION (coding, 2); |
b73bfc1c | 2013 | ONE_MORE_BYTE (c1); |
e7046a18 KH |
2014 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
2015 | goto label_invalid_code; | |
4ed46869 KH |
2016 | break; |
2017 | ||
2018 | case 'O': /* invocation of single-shift-3 */ | |
d46c5b12 KH |
2019 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) |
2020 | || CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0) | |
2021 | goto label_invalid_code; | |
4ed46869 | 2022 | charset = CODING_SPEC_ISO_DESIGNATION (coding, 3); |
b73bfc1c | 2023 | ONE_MORE_BYTE (c1); |
e7046a18 KH |
2024 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
2025 | goto label_invalid_code; | |
4ed46869 KH |
2026 | break; |
2027 | ||
ec6d2bb8 KH |
2028 | case '0': case '2': case '3': case '4': /* start composition */ |
2029 | DECODE_COMPOSITION_START (c1); | |
b73bfc1c | 2030 | continue; |
4ed46869 | 2031 | |
ec6d2bb8 KH |
2032 | case '1': /* end composition */ |
2033 | DECODE_COMPOSITION_END (c1); | |
b73bfc1c | 2034 | continue; |
4ed46869 KH |
2035 | |
2036 | case '[': /* specification of direction */ | |
d46c5b12 KH |
2037 | if (coding->flags & CODING_FLAG_ISO_NO_DIRECTION) |
2038 | goto label_invalid_code; | |
4ed46869 | 2039 | /* For the moment, nested direction is not supported. |
d46c5b12 | 2040 | So, `coding->mode & CODING_MODE_DIRECTION' zero means |
8ca3766a | 2041 | left-to-right, and nonzero means right-to-left. */ |
4ed46869 KH |
2042 | ONE_MORE_BYTE (c1); |
2043 | switch (c1) | |
2044 | { | |
2045 | case ']': /* end of the current direction */ | |
d46c5b12 | 2046 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 KH |
2047 | |
2048 | case '0': /* end of the current direction */ | |
2049 | case '1': /* start of left-to-right direction */ | |
2050 | ONE_MORE_BYTE (c1); | |
2051 | if (c1 == ']') | |
d46c5b12 | 2052 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 | 2053 | else |
d46c5b12 | 2054 | goto label_invalid_code; |
4ed46869 KH |
2055 | break; |
2056 | ||
2057 | case '2': /* start of right-to-left direction */ | |
2058 | ONE_MORE_BYTE (c1); | |
2059 | if (c1 == ']') | |
d46c5b12 | 2060 | coding->mode |= CODING_MODE_DIRECTION; |
4ed46869 | 2061 | else |
d46c5b12 | 2062 | goto label_invalid_code; |
4ed46869 KH |
2063 | break; |
2064 | ||
2065 | default: | |
d46c5b12 | 2066 | goto label_invalid_code; |
4ed46869 | 2067 | } |
b73bfc1c | 2068 | continue; |
4ed46869 | 2069 | |
103e0180 KH |
2070 | case '%': |
2071 | if (COMPOSING_P (coding)) | |
2072 | DECODE_COMPOSITION_END ('1'); | |
2073 | ONE_MORE_BYTE (c1); | |
2074 | if (c1 == '/') | |
2075 | { | |
2076 | /* CTEXT extended segment: | |
2077 | ESC % / [0-4] M L --ENCODING-NAME-- \002 --BYTES-- | |
2078 | We keep these bytes as is for the moment. | |
2079 | They may be decoded by post-read-conversion. */ | |
2080 | int dim, M, L; | |
2081 | int size, required; | |
2082 | int produced_chars; | |
2083 | ||
2084 | ONE_MORE_BYTE (dim); | |
2085 | ONE_MORE_BYTE (M); | |
2086 | ONE_MORE_BYTE (L); | |
2087 | size = ((M - 128) * 128) + (L - 128); | |
2088 | required = 8 + size * 2; | |
2089 | if (dst + required > (dst_bytes ? dst_end : src)) | |
2090 | goto label_end_of_loop; | |
2091 | *dst++ = ISO_CODE_ESC; | |
2092 | *dst++ = '%'; | |
2093 | *dst++ = '/'; | |
2094 | *dst++ = dim; | |
2095 | produced_chars = 4; | |
2096 | dst += CHAR_STRING (M, dst), produced_chars++; | |
2097 | dst += CHAR_STRING (L, dst), produced_chars++; | |
2098 | while (size-- > 0) | |
2099 | { | |
2100 | ONE_MORE_BYTE (c1); | |
2101 | dst += CHAR_STRING (c1, dst), produced_chars++; | |
2102 | } | |
2103 | coding->produced_char += produced_chars; | |
2104 | } | |
2105 | else if (c1 == 'G') | |
2106 | { | |
2107 | unsigned char *d = dst; | |
2108 | int produced_chars; | |
2109 | ||
2110 | /* XFree86 extension for embedding UTF-8 in CTEXT: | |
2111 | ESC % G --UTF-8-BYTES-- ESC % @ | |
2112 | We keep these bytes as is for the moment. | |
2113 | They may be decoded by post-read-conversion. */ | |
2114 | if (d + 6 > (dst_bytes ? dst_end : src)) | |
2115 | goto label_end_of_loop; | |
2116 | *d++ = ISO_CODE_ESC; | |
2117 | *d++ = '%'; | |
2118 | *d++ = 'G'; | |
2119 | produced_chars = 3; | |
2120 | while (d + 1 < (dst_bytes ? dst_end : src)) | |
2121 | { | |
2122 | ONE_MORE_BYTE (c1); | |
2123 | if (c1 == ISO_CODE_ESC | |
2124 | && src + 1 < src_end | |
2125 | && src[0] == '%' | |
2126 | && src[1] == '@') | |
2127 | break; | |
2128 | d += CHAR_STRING (c1, d), produced_chars++; | |
2129 | } | |
2130 | if (d + 3 > (dst_bytes ? dst_end : src)) | |
2131 | goto label_end_of_loop; | |
2132 | *d++ = ISO_CODE_ESC; | |
2133 | *d++ = '%'; | |
2134 | *d++ = '@'; | |
2135 | dst = d; | |
2136 | coding->produced_char += produced_chars + 3; | |
2137 | } | |
2138 | else | |
2139 | goto label_invalid_code; | |
2140 | continue; | |
2141 | ||
4ed46869 | 2142 | default: |
d46c5b12 KH |
2143 | if (! (coding->flags & CODING_FLAG_ISO_DESIGNATION)) |
2144 | goto label_invalid_code; | |
4ed46869 KH |
2145 | if (c1 >= 0x28 && c1 <= 0x2B) |
2146 | { /* designation of DIMENSION1_CHARS94 character set */ | |
2147 | ONE_MORE_BYTE (c2); | |
2148 | DECODE_DESIGNATION (c1 - 0x28, 1, 94, c2); | |
2149 | } | |
2150 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
2151 | { /* designation of DIMENSION1_CHARS96 character set */ | |
2152 | ONE_MORE_BYTE (c2); | |
2153 | DECODE_DESIGNATION (c1 - 0x2C, 1, 96, c2); | |
2154 | } | |
2155 | else | |
b73bfc1c KH |
2156 | goto label_invalid_code; |
2157 | /* We must update these variables now. */ | |
2158 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
2159 | charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
2160 | continue; | |
4ed46869 | 2161 | } |
b73bfc1c | 2162 | } |
4ed46869 | 2163 | |
b73bfc1c KH |
2164 | /* Now we know CHARSET and 1st position code C1 of a character. |
2165 | Produce a multibyte sequence for that character while getting | |
2166 | 2nd position code C2 if necessary. */ | |
2167 | if (CHARSET_DIMENSION (charset) == 2) | |
2168 | { | |
2169 | ONE_MORE_BYTE (c2); | |
2170 | if (c1 < 0x80 ? c2 < 0x20 || c2 >= 0x80 : c2 < 0xA0) | |
2171 | /* C2 is not in a valid range. */ | |
2172 | goto label_invalid_code; | |
4ed46869 | 2173 | } |
b73bfc1c KH |
2174 | c = DECODE_ISO_CHARACTER (charset, c1, c2); |
2175 | EMIT_CHAR (c); | |
4ed46869 KH |
2176 | continue; |
2177 | ||
b73bfc1c KH |
2178 | label_invalid_code: |
2179 | coding->errors++; | |
2180 | if (COMPOSING_P (coding)) | |
2181 | DECODE_COMPOSITION_END ('1'); | |
4ed46869 | 2182 | src = src_base; |
b73bfc1c KH |
2183 | c = *src++; |
2184 | EMIT_CHAR (c); | |
4ed46869 | 2185 | } |
fb88bf2d | 2186 | |
b73bfc1c KH |
2187 | label_end_of_loop: |
2188 | coding->consumed = coding->consumed_char = src_base - source; | |
d46c5b12 | 2189 | coding->produced = dst - destination; |
b73bfc1c | 2190 | return; |
4ed46869 KH |
2191 | } |
2192 | ||
b73bfc1c | 2193 | |
f4dee582 | 2194 | /* ISO2022 encoding stuff. */ |
4ed46869 KH |
2195 | |
2196 | /* | |
f4dee582 | 2197 | It is not enough to say just "ISO2022" on encoding, we have to |
cfb43547 | 2198 | specify more details. In Emacs, each ISO2022 coding system |
4ed46869 | 2199 | variant has the following specifications: |
8ca3766a | 2200 | 1. Initial designation to G0 through G3. |
4ed46869 KH |
2201 | 2. Allows short-form designation? |
2202 | 3. ASCII should be designated to G0 before control characters? | |
2203 | 4. ASCII should be designated to G0 at end of line? | |
2204 | 5. 7-bit environment or 8-bit environment? | |
2205 | 6. Use locking-shift? | |
2206 | 7. Use Single-shift? | |
2207 | And the following two are only for Japanese: | |
2208 | 8. Use ASCII in place of JIS0201-1976-Roman? | |
2209 | 9. Use JISX0208-1983 in place of JISX0208-1978? | |
2210 | These specifications are encoded in `coding->flags' as flag bits | |
2211 | defined by macros CODING_FLAG_ISO_XXX. See `coding.h' for more | |
f4dee582 | 2212 | details. |
4ed46869 KH |
2213 | */ |
2214 | ||
2215 | /* Produce codes (escape sequence) for designating CHARSET to graphic | |
b73bfc1c KH |
2216 | register REG at DST, and increment DST. If <final-char> of CHARSET is |
2217 | '@', 'A', or 'B' and the coding system CODING allows, produce | |
2218 | designation sequence of short-form. */ | |
4ed46869 KH |
2219 | |
2220 | #define ENCODE_DESIGNATION(charset, reg, coding) \ | |
2221 | do { \ | |
2222 | unsigned char final_char = CHARSET_ISO_FINAL_CHAR (charset); \ | |
2223 | char *intermediate_char_94 = "()*+"; \ | |
2224 | char *intermediate_char_96 = ",-./"; \ | |
70c22245 | 2225 | int revision = CODING_SPEC_ISO_REVISION_NUMBER(coding, charset); \ |
b73bfc1c | 2226 | \ |
70c22245 KH |
2227 | if (revision < 255) \ |
2228 | { \ | |
4ed46869 KH |
2229 | *dst++ = ISO_CODE_ESC; \ |
2230 | *dst++ = '&'; \ | |
70c22245 | 2231 | *dst++ = '@' + revision; \ |
4ed46869 | 2232 | } \ |
b73bfc1c | 2233 | *dst++ = ISO_CODE_ESC; \ |
4ed46869 KH |
2234 | if (CHARSET_DIMENSION (charset) == 1) \ |
2235 | { \ | |
2236 | if (CHARSET_CHARS (charset) == 94) \ | |
2237 | *dst++ = (unsigned char) (intermediate_char_94[reg]); \ | |
2238 | else \ | |
2239 | *dst++ = (unsigned char) (intermediate_char_96[reg]); \ | |
2240 | } \ | |
2241 | else \ | |
2242 | { \ | |
2243 | *dst++ = '$'; \ | |
2244 | if (CHARSET_CHARS (charset) == 94) \ | |
2245 | { \ | |
b73bfc1c KH |
2246 | if (! (coding->flags & CODING_FLAG_ISO_SHORT_FORM) \ |
2247 | || reg != 0 \ | |
2248 | || final_char < '@' || final_char > 'B') \ | |
4ed46869 KH |
2249 | *dst++ = (unsigned char) (intermediate_char_94[reg]); \ |
2250 | } \ | |
2251 | else \ | |
b73bfc1c | 2252 | *dst++ = (unsigned char) (intermediate_char_96[reg]); \ |
4ed46869 | 2253 | } \ |
b73bfc1c | 2254 | *dst++ = final_char; \ |
4ed46869 KH |
2255 | CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \ |
2256 | } while (0) | |
2257 | ||
2258 | /* The following two macros produce codes (control character or escape | |
2259 | sequence) for ISO2022 single-shift functions (single-shift-2 and | |
2260 | single-shift-3). */ | |
2261 | ||
2262 | #define ENCODE_SINGLE_SHIFT_2 \ | |
2263 | do { \ | |
2264 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2265 | *dst++ = ISO_CODE_ESC, *dst++ = 'N'; \ | |
2266 | else \ | |
b73bfc1c | 2267 | *dst++ = ISO_CODE_SS2; \ |
4ed46869 KH |
2268 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 1; \ |
2269 | } while (0) | |
2270 | ||
fb88bf2d KH |
2271 | #define ENCODE_SINGLE_SHIFT_3 \ |
2272 | do { \ | |
4ed46869 | 2273 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ |
fb88bf2d KH |
2274 | *dst++ = ISO_CODE_ESC, *dst++ = 'O'; \ |
2275 | else \ | |
b73bfc1c | 2276 | *dst++ = ISO_CODE_SS3; \ |
4ed46869 KH |
2277 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 1; \ |
2278 | } while (0) | |
2279 | ||
2280 | /* The following four macros produce codes (control character or | |
2281 | escape sequence) for ISO2022 locking-shift functions (shift-in, | |
2282 | shift-out, locking-shift-2, and locking-shift-3). */ | |
2283 | ||
b73bfc1c KH |
2284 | #define ENCODE_SHIFT_IN \ |
2285 | do { \ | |
2286 | *dst++ = ISO_CODE_SI; \ | |
4ed46869 KH |
2287 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; \ |
2288 | } while (0) | |
2289 | ||
b73bfc1c KH |
2290 | #define ENCODE_SHIFT_OUT \ |
2291 | do { \ | |
2292 | *dst++ = ISO_CODE_SO; \ | |
4ed46869 KH |
2293 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 1; \ |
2294 | } while (0) | |
2295 | ||
2296 | #define ENCODE_LOCKING_SHIFT_2 \ | |
2297 | do { \ | |
2298 | *dst++ = ISO_CODE_ESC, *dst++ = 'n'; \ | |
2299 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 2; \ | |
2300 | } while (0) | |
2301 | ||
b73bfc1c KH |
2302 | #define ENCODE_LOCKING_SHIFT_3 \ |
2303 | do { \ | |
2304 | *dst++ = ISO_CODE_ESC, *dst++ = 'o'; \ | |
4ed46869 KH |
2305 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 3; \ |
2306 | } while (0) | |
2307 | ||
f4dee582 RS |
2308 | /* Produce codes for a DIMENSION1 character whose character set is |
2309 | CHARSET and whose position-code is C1. Designation and invocation | |
4ed46869 KH |
2310 | sequences are also produced in advance if necessary. */ |
2311 | ||
6e85d753 KH |
2312 | #define ENCODE_ISO_CHARACTER_DIMENSION1(charset, c1) \ |
2313 | do { \ | |
2314 | if (CODING_SPEC_ISO_SINGLE_SHIFTING (coding)) \ | |
2315 | { \ | |
2316 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2317 | *dst++ = c1 & 0x7F; \ | |
2318 | else \ | |
2319 | *dst++ = c1 | 0x80; \ | |
2320 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
2321 | break; \ | |
2322 | } \ | |
2323 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 0)) \ | |
2324 | { \ | |
2325 | *dst++ = c1 & 0x7F; \ | |
2326 | break; \ | |
2327 | } \ | |
2328 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 1)) \ | |
2329 | { \ | |
2330 | *dst++ = c1 | 0x80; \ | |
2331 | break; \ | |
2332 | } \ | |
6e85d753 KH |
2333 | else \ |
2334 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
2335 | must invoke it, or, at first, designate it to some graphic \ | |
2336 | register. Then repeat the loop to actually produce the \ | |
2337 | character. */ \ | |
2338 | dst = encode_invocation_designation (charset, coding, dst); \ | |
4ed46869 KH |
2339 | } while (1) |
2340 | ||
f4dee582 RS |
2341 | /* Produce codes for a DIMENSION2 character whose character set is |
2342 | CHARSET and whose position-codes are C1 and C2. Designation and | |
4ed46869 KH |
2343 | invocation codes are also produced in advance if necessary. */ |
2344 | ||
6e85d753 KH |
2345 | #define ENCODE_ISO_CHARACTER_DIMENSION2(charset, c1, c2) \ |
2346 | do { \ | |
2347 | if (CODING_SPEC_ISO_SINGLE_SHIFTING (coding)) \ | |
2348 | { \ | |
2349 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2350 | *dst++ = c1 & 0x7F, *dst++ = c2 & 0x7F; \ | |
2351 | else \ | |
2352 | *dst++ = c1 | 0x80, *dst++ = c2 | 0x80; \ | |
2353 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
2354 | break; \ | |
2355 | } \ | |
2356 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 0)) \ | |
2357 | { \ | |
2358 | *dst++ = c1 & 0x7F, *dst++= c2 & 0x7F; \ | |
2359 | break; \ | |
2360 | } \ | |
2361 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 1)) \ | |
2362 | { \ | |
2363 | *dst++ = c1 | 0x80, *dst++= c2 | 0x80; \ | |
2364 | break; \ | |
2365 | } \ | |
6e85d753 KH |
2366 | else \ |
2367 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
2368 | must invoke it, or, at first, designate it to some graphic \ | |
2369 | register. Then repeat the loop to actually produce the \ | |
2370 | character. */ \ | |
2371 | dst = encode_invocation_designation (charset, coding, dst); \ | |
4ed46869 KH |
2372 | } while (1) |
2373 | ||
05e6f5dc KH |
2374 | #define ENCODE_ISO_CHARACTER(c) \ |
2375 | do { \ | |
2376 | int charset, c1, c2; \ | |
2377 | \ | |
2378 | SPLIT_CHAR (c, charset, c1, c2); \ | |
2379 | if (CHARSET_DEFINED_P (charset)) \ | |
2380 | { \ | |
2381 | if (CHARSET_DIMENSION (charset) == 1) \ | |
2382 | { \ | |
2383 | if (charset == CHARSET_ASCII \ | |
2384 | && coding->flags & CODING_FLAG_ISO_USE_ROMAN) \ | |
2385 | charset = charset_latin_jisx0201; \ | |
2386 | ENCODE_ISO_CHARACTER_DIMENSION1 (charset, c1); \ | |
2387 | } \ | |
2388 | else \ | |
2389 | { \ | |
2390 | if (charset == charset_jisx0208 \ | |
2391 | && coding->flags & CODING_FLAG_ISO_USE_OLDJIS) \ | |
2392 | charset = charset_jisx0208_1978; \ | |
2393 | ENCODE_ISO_CHARACTER_DIMENSION2 (charset, c1, c2); \ | |
2394 | } \ | |
2395 | } \ | |
2396 | else \ | |
2397 | { \ | |
2398 | *dst++ = c1; \ | |
2399 | if (c2 >= 0) \ | |
2400 | *dst++ = c2; \ | |
2401 | } \ | |
2402 | } while (0) | |
2403 | ||
2404 | ||
2405 | /* Instead of encoding character C, produce one or two `?'s. */ | |
2406 | ||
0eecad43 KH |
2407 | #define ENCODE_UNSAFE_CHARACTER(c) \ |
2408 | do { \ | |
2409 | ENCODE_ISO_CHARACTER (CODING_REPLACEMENT_CHARACTER); \ | |
2410 | if (CHARSET_WIDTH (CHAR_CHARSET (c)) > 1) \ | |
2411 | ENCODE_ISO_CHARACTER (CODING_REPLACEMENT_CHARACTER); \ | |
84fbb8a0 | 2412 | } while (0) |
bdd9fb48 | 2413 | |
05e6f5dc | 2414 | |
4ed46869 KH |
2415 | /* Produce designation and invocation codes at a place pointed by DST |
2416 | to use CHARSET. The element `spec.iso2022' of *CODING is updated. | |
2417 | Return new DST. */ | |
2418 | ||
2419 | unsigned char * | |
2420 | encode_invocation_designation (charset, coding, dst) | |
2421 | int charset; | |
2422 | struct coding_system *coding; | |
2423 | unsigned char *dst; | |
2424 | { | |
2425 | int reg; /* graphic register number */ | |
2426 | ||
2427 | /* At first, check designations. */ | |
2428 | for (reg = 0; reg < 4; reg++) | |
2429 | if (charset == CODING_SPEC_ISO_DESIGNATION (coding, reg)) | |
2430 | break; | |
2431 | ||
2432 | if (reg >= 4) | |
2433 | { | |
2434 | /* CHARSET is not yet designated to any graphic registers. */ | |
2435 | /* At first check the requested designation. */ | |
2436 | reg = CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset); | |
1ba9e4ab KH |
2437 | if (reg == CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION) |
2438 | /* Since CHARSET requests no special designation, designate it | |
2439 | to graphic register 0. */ | |
4ed46869 KH |
2440 | reg = 0; |
2441 | ||
2442 | ENCODE_DESIGNATION (charset, reg, coding); | |
2443 | } | |
2444 | ||
2445 | if (CODING_SPEC_ISO_INVOCATION (coding, 0) != reg | |
2446 | && CODING_SPEC_ISO_INVOCATION (coding, 1) != reg) | |
2447 | { | |
2448 | /* Since the graphic register REG is not invoked to any graphic | |
2449 | planes, invoke it to graphic plane 0. */ | |
2450 | switch (reg) | |
2451 | { | |
2452 | case 0: /* graphic register 0 */ | |
2453 | ENCODE_SHIFT_IN; | |
2454 | break; | |
2455 | ||
2456 | case 1: /* graphic register 1 */ | |
2457 | ENCODE_SHIFT_OUT; | |
2458 | break; | |
2459 | ||
2460 | case 2: /* graphic register 2 */ | |
2461 | if (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) | |
2462 | ENCODE_SINGLE_SHIFT_2; | |
2463 | else | |
2464 | ENCODE_LOCKING_SHIFT_2; | |
2465 | break; | |
2466 | ||
2467 | case 3: /* graphic register 3 */ | |
2468 | if (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) | |
2469 | ENCODE_SINGLE_SHIFT_3; | |
2470 | else | |
2471 | ENCODE_LOCKING_SHIFT_3; | |
2472 | break; | |
2473 | } | |
2474 | } | |
b73bfc1c | 2475 | |
4ed46869 KH |
2476 | return dst; |
2477 | } | |
2478 | ||
ec6d2bb8 KH |
2479 | /* Produce 2-byte codes for encoded composition rule RULE. */ |
2480 | ||
2481 | #define ENCODE_COMPOSITION_RULE(rule) \ | |
2482 | do { \ | |
2483 | int gref, nref; \ | |
2484 | COMPOSITION_DECODE_RULE (rule, gref, nref); \ | |
2485 | *dst++ = 32 + 81 + gref; \ | |
2486 | *dst++ = 32 + nref; \ | |
2487 | } while (0) | |
2488 | ||
2489 | /* Produce codes for indicating the start of a composition sequence | |
2490 | (ESC 0, ESC 3, or ESC 4). DATA points to an array of integers | |
2491 | which specify information about the composition. See the comment | |
2492 | in coding.h for the format of DATA. */ | |
2493 | ||
2494 | #define ENCODE_COMPOSITION_START(coding, data) \ | |
2495 | do { \ | |
2496 | coding->composing = data[3]; \ | |
2497 | *dst++ = ISO_CODE_ESC; \ | |
2498 | if (coding->composing == COMPOSITION_RELATIVE) \ | |
2499 | *dst++ = '0'; \ | |
2500 | else \ | |
2501 | { \ | |
2502 | *dst++ = (coding->composing == COMPOSITION_WITH_ALTCHARS \ | |
2503 | ? '3' : '4'); \ | |
2504 | coding->cmp_data_index = coding->cmp_data_start + 4; \ | |
2505 | coding->composition_rule_follows = 0; \ | |
2506 | } \ | |
2507 | } while (0) | |
2508 | ||
2509 | /* Produce codes for indicating the end of the current composition. */ | |
2510 | ||
2511 | #define ENCODE_COMPOSITION_END(coding, data) \ | |
2512 | do { \ | |
2513 | *dst++ = ISO_CODE_ESC; \ | |
2514 | *dst++ = '1'; \ | |
2515 | coding->cmp_data_start += data[0]; \ | |
2516 | coding->composing = COMPOSITION_NO; \ | |
2517 | if (coding->cmp_data_start == coding->cmp_data->used \ | |
2518 | && coding->cmp_data->next) \ | |
2519 | { \ | |
2520 | coding->cmp_data = coding->cmp_data->next; \ | |
2521 | coding->cmp_data_start = 0; \ | |
2522 | } \ | |
2523 | } while (0) | |
2524 | ||
2525 | /* Produce composition start sequence ESC 0. Here, this sequence | |
2526 | doesn't mean the start of a new composition but means that we have | |
2527 | just produced components (alternate chars and composition rules) of | |
2528 | the composition and the actual text follows in SRC. */ | |
2529 | ||
2530 | #define ENCODE_COMPOSITION_FAKE_START(coding) \ | |
2531 | do { \ | |
2532 | *dst++ = ISO_CODE_ESC; \ | |
2533 | *dst++ = '0'; \ | |
2534 | coding->composing = COMPOSITION_RELATIVE; \ | |
2535 | } while (0) | |
4ed46869 KH |
2536 | |
2537 | /* The following three macros produce codes for indicating direction | |
2538 | of text. */ | |
b73bfc1c KH |
2539 | #define ENCODE_CONTROL_SEQUENCE_INTRODUCER \ |
2540 | do { \ | |
4ed46869 | 2541 | if (coding->flags == CODING_FLAG_ISO_SEVEN_BITS) \ |
b73bfc1c KH |
2542 | *dst++ = ISO_CODE_ESC, *dst++ = '['; \ |
2543 | else \ | |
2544 | *dst++ = ISO_CODE_CSI; \ | |
4ed46869 KH |
2545 | } while (0) |
2546 | ||
2547 | #define ENCODE_DIRECTION_R2L \ | |
b73bfc1c | 2548 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst), *dst++ = '2', *dst++ = ']' |
4ed46869 KH |
2549 | |
2550 | #define ENCODE_DIRECTION_L2R \ | |
b73bfc1c | 2551 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst), *dst++ = '0', *dst++ = ']' |
4ed46869 KH |
2552 | |
2553 | /* Produce codes for designation and invocation to reset the graphic | |
2554 | planes and registers to initial state. */ | |
e0e989f6 KH |
2555 | #define ENCODE_RESET_PLANE_AND_REGISTER \ |
2556 | do { \ | |
2557 | int reg; \ | |
2558 | if (CODING_SPEC_ISO_INVOCATION (coding, 0) != 0) \ | |
2559 | ENCODE_SHIFT_IN; \ | |
2560 | for (reg = 0; reg < 4; reg++) \ | |
2561 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg) >= 0 \ | |
2562 | && (CODING_SPEC_ISO_DESIGNATION (coding, reg) \ | |
2563 | != CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg))) \ | |
2564 | ENCODE_DESIGNATION \ | |
2565 | (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg), reg, coding); \ | |
4ed46869 KH |
2566 | } while (0) |
2567 | ||
bdd9fb48 | 2568 | /* Produce designation sequences of charsets in the line started from |
b73bfc1c | 2569 | SRC to a place pointed by DST, and return updated DST. |
bdd9fb48 KH |
2570 | |
2571 | If the current block ends before any end-of-line, we may fail to | |
d46c5b12 KH |
2572 | find all the necessary designations. */ |
2573 | ||
b73bfc1c KH |
2574 | static unsigned char * |
2575 | encode_designation_at_bol (coding, translation_table, src, src_end, dst) | |
e0e989f6 | 2576 | struct coding_system *coding; |
b73bfc1c KH |
2577 | Lisp_Object translation_table; |
2578 | unsigned char *src, *src_end, *dst; | |
e0e989f6 | 2579 | { |
bdd9fb48 KH |
2580 | int charset, c, found = 0, reg; |
2581 | /* Table of charsets to be designated to each graphic register. */ | |
2582 | int r[4]; | |
bdd9fb48 KH |
2583 | |
2584 | for (reg = 0; reg < 4; reg++) | |
2585 | r[reg] = -1; | |
2586 | ||
b73bfc1c | 2587 | while (found < 4) |
e0e989f6 | 2588 | { |
b73bfc1c KH |
2589 | ONE_MORE_CHAR (c); |
2590 | if (c == '\n') | |
2591 | break; | |
93dec019 | 2592 | |
b73bfc1c | 2593 | charset = CHAR_CHARSET (c); |
e0e989f6 | 2594 | reg = CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset); |
d46c5b12 | 2595 | if (reg != CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION && r[reg] < 0) |
bdd9fb48 KH |
2596 | { |
2597 | found++; | |
2598 | r[reg] = charset; | |
2599 | } | |
bdd9fb48 KH |
2600 | } |
2601 | ||
b73bfc1c | 2602 | label_end_of_loop: |
bdd9fb48 KH |
2603 | if (found) |
2604 | { | |
2605 | for (reg = 0; reg < 4; reg++) | |
2606 | if (r[reg] >= 0 | |
2607 | && CODING_SPEC_ISO_DESIGNATION (coding, reg) != r[reg]) | |
2608 | ENCODE_DESIGNATION (r[reg], reg, coding); | |
e0e989f6 | 2609 | } |
b73bfc1c KH |
2610 | |
2611 | return dst; | |
e0e989f6 KH |
2612 | } |
2613 | ||
4ed46869 KH |
2614 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */ |
2615 | ||
b73bfc1c | 2616 | static void |
d46c5b12 | 2617 | encode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
2618 | struct coding_system *coding; |
2619 | unsigned char *source, *destination; | |
2620 | int src_bytes, dst_bytes; | |
4ed46869 KH |
2621 | { |
2622 | unsigned char *src = source; | |
2623 | unsigned char *src_end = source + src_bytes; | |
2624 | unsigned char *dst = destination; | |
2625 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c | 2626 | /* Since the maximum bytes produced by each loop is 20, we subtract 19 |
4ed46869 KH |
2627 | from DST_END to assure overflow checking is necessary only at the |
2628 | head of loop. */ | |
b73bfc1c KH |
2629 | unsigned char *adjusted_dst_end = dst_end - 19; |
2630 | /* SRC_BASE remembers the start position in source in each loop. | |
2631 | The loop will be exited when there's not enough source text to | |
2632 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
2633 | there's not enough destination area to produce encoded codes | |
2634 | (within macro EMIT_BYTES). */ | |
2635 | unsigned char *src_base; | |
2636 | int c; | |
2637 | Lisp_Object translation_table; | |
05e6f5dc KH |
2638 | Lisp_Object safe_chars; |
2639 | ||
0eecad43 KH |
2640 | if (coding->flags & CODING_FLAG_ISO_SAFE) |
2641 | coding->mode |= CODING_MODE_INHIBIT_UNENCODABLE_CHAR; | |
2642 | ||
6b89e3aa | 2643 | safe_chars = coding_safe_chars (coding->symbol); |
bdd9fb48 | 2644 | |
b73bfc1c KH |
2645 | if (NILP (Venable_character_translation)) |
2646 | translation_table = Qnil; | |
2647 | else | |
2648 | { | |
2649 | translation_table = coding->translation_table_for_encode; | |
2650 | if (NILP (translation_table)) | |
2651 | translation_table = Vstandard_translation_table_for_encode; | |
2652 | } | |
4ed46869 | 2653 | |
d46c5b12 | 2654 | coding->consumed_char = 0; |
b73bfc1c KH |
2655 | coding->errors = 0; |
2656 | while (1) | |
4ed46869 | 2657 | { |
b73bfc1c KH |
2658 | src_base = src; |
2659 | ||
2660 | if (dst >= (dst_bytes ? adjusted_dst_end : (src - 19))) | |
2661 | { | |
2662 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
2663 | break; | |
2664 | } | |
4ed46869 | 2665 | |
e0e989f6 KH |
2666 | if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL |
2667 | && CODING_SPEC_ISO_BOL (coding)) | |
2668 | { | |
bdd9fb48 | 2669 | /* We have to produce designation sequences if any now. */ |
b73bfc1c KH |
2670 | dst = encode_designation_at_bol (coding, translation_table, |
2671 | src, src_end, dst); | |
e0e989f6 KH |
2672 | CODING_SPEC_ISO_BOL (coding) = 0; |
2673 | } | |
2674 | ||
ec6d2bb8 KH |
2675 | /* Check composition start and end. */ |
2676 | if (coding->composing != COMPOSITION_DISABLED | |
2677 | && coding->cmp_data_start < coding->cmp_data->used) | |
4ed46869 | 2678 | { |
ec6d2bb8 KH |
2679 | struct composition_data *cmp_data = coding->cmp_data; |
2680 | int *data = cmp_data->data + coding->cmp_data_start; | |
2681 | int this_pos = cmp_data->char_offset + coding->consumed_char; | |
2682 | ||
2683 | if (coding->composing == COMPOSITION_RELATIVE) | |
4ed46869 | 2684 | { |
ec6d2bb8 KH |
2685 | if (this_pos == data[2]) |
2686 | { | |
2687 | ENCODE_COMPOSITION_END (coding, data); | |
2688 | cmp_data = coding->cmp_data; | |
2689 | data = cmp_data->data + coding->cmp_data_start; | |
2690 | } | |
4ed46869 | 2691 | } |
ec6d2bb8 | 2692 | else if (COMPOSING_P (coding)) |
4ed46869 | 2693 | { |
ec6d2bb8 KH |
2694 | /* COMPOSITION_WITH_ALTCHARS or COMPOSITION_WITH_RULE_ALTCHAR */ |
2695 | if (coding->cmp_data_index == coding->cmp_data_start + data[0]) | |
2696 | /* We have consumed components of the composition. | |
8ca3766a | 2697 | What follows in SRC is the composition's base |
ec6d2bb8 KH |
2698 | text. */ |
2699 | ENCODE_COMPOSITION_FAKE_START (coding); | |
2700 | else | |
4ed46869 | 2701 | { |
ec6d2bb8 KH |
2702 | int c = cmp_data->data[coding->cmp_data_index++]; |
2703 | if (coding->composition_rule_follows) | |
2704 | { | |
2705 | ENCODE_COMPOSITION_RULE (c); | |
2706 | coding->composition_rule_follows = 0; | |
2707 | } | |
2708 | else | |
2709 | { | |
0eecad43 | 2710 | if (coding->mode & CODING_MODE_INHIBIT_UNENCODABLE_CHAR |
05e6f5dc KH |
2711 | && ! CODING_SAFE_CHAR_P (safe_chars, c)) |
2712 | ENCODE_UNSAFE_CHARACTER (c); | |
2713 | else | |
2714 | ENCODE_ISO_CHARACTER (c); | |
ec6d2bb8 KH |
2715 | if (coding->composing == COMPOSITION_WITH_RULE_ALTCHARS) |
2716 | coding->composition_rule_follows = 1; | |
2717 | } | |
4ed46869 KH |
2718 | continue; |
2719 | } | |
ec6d2bb8 KH |
2720 | } |
2721 | if (!COMPOSING_P (coding)) | |
2722 | { | |
2723 | if (this_pos == data[1]) | |
4ed46869 | 2724 | { |
ec6d2bb8 KH |
2725 | ENCODE_COMPOSITION_START (coding, data); |
2726 | continue; | |
4ed46869 | 2727 | } |
4ed46869 KH |
2728 | } |
2729 | } | |
ec6d2bb8 | 2730 | |
b73bfc1c | 2731 | ONE_MORE_CHAR (c); |
4ed46869 | 2732 | |
b73bfc1c KH |
2733 | /* Now encode the character C. */ |
2734 | if (c < 0x20 || c == 0x7F) | |
2735 | { | |
2736 | if (c == '\r') | |
19a8d9e0 | 2737 | { |
b73bfc1c KH |
2738 | if (! (coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) |
2739 | { | |
2740 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL) | |
2741 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2742 | *dst++ = c; | |
2743 | continue; | |
2744 | } | |
2745 | /* fall down to treat '\r' as '\n' ... */ | |
2746 | c = '\n'; | |
19a8d9e0 | 2747 | } |
b73bfc1c | 2748 | if (c == '\n') |
19a8d9e0 | 2749 | { |
b73bfc1c KH |
2750 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_EOL) |
2751 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2752 | if (coding->flags & CODING_FLAG_ISO_INIT_AT_BOL) | |
2753 | bcopy (coding->spec.iso2022.initial_designation, | |
2754 | coding->spec.iso2022.current_designation, | |
2755 | sizeof coding->spec.iso2022.initial_designation); | |
2756 | if (coding->eol_type == CODING_EOL_LF | |
2757 | || coding->eol_type == CODING_EOL_UNDECIDED) | |
2758 | *dst++ = ISO_CODE_LF; | |
2759 | else if (coding->eol_type == CODING_EOL_CRLF) | |
2760 | *dst++ = ISO_CODE_CR, *dst++ = ISO_CODE_LF; | |
2761 | else | |
2762 | *dst++ = ISO_CODE_CR; | |
2763 | CODING_SPEC_ISO_BOL (coding) = 1; | |
19a8d9e0 | 2764 | } |
93dec019 | 2765 | else |
19a8d9e0 | 2766 | { |
b73bfc1c KH |
2767 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL) |
2768 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2769 | *dst++ = c; | |
19a8d9e0 | 2770 | } |
4ed46869 | 2771 | } |
b73bfc1c | 2772 | else if (ASCII_BYTE_P (c)) |
05e6f5dc | 2773 | ENCODE_ISO_CHARACTER (c); |
b73bfc1c | 2774 | else if (SINGLE_BYTE_CHAR_P (c)) |
88993dfd | 2775 | { |
b73bfc1c KH |
2776 | *dst++ = c; |
2777 | coding->errors++; | |
88993dfd | 2778 | } |
0eecad43 | 2779 | else if (coding->mode & CODING_MODE_INHIBIT_UNENCODABLE_CHAR |
05e6f5dc KH |
2780 | && ! CODING_SAFE_CHAR_P (safe_chars, c)) |
2781 | ENCODE_UNSAFE_CHARACTER (c); | |
b73bfc1c | 2782 | else |
05e6f5dc | 2783 | ENCODE_ISO_CHARACTER (c); |
b73bfc1c KH |
2784 | |
2785 | coding->consumed_char++; | |
84fbb8a0 | 2786 | } |
b73bfc1c KH |
2787 | |
2788 | label_end_of_loop: | |
2789 | coding->consumed = src_base - source; | |
d46c5b12 | 2790 | coding->produced = coding->produced_char = dst - destination; |
4ed46869 KH |
2791 | } |
2792 | ||
2793 | \f | |
2794 | /*** 4. SJIS and BIG5 handlers ***/ | |
2795 | ||
cfb43547 | 2796 | /* Although SJIS and BIG5 are not ISO coding systems, they are used |
4ed46869 KH |
2797 | quite widely. So, for the moment, Emacs supports them in the bare |
2798 | C code. But, in the future, they may be supported only by CCL. */ | |
2799 | ||
2800 | /* SJIS is a coding system encoding three character sets: ASCII, right | |
2801 | half of JISX0201-Kana, and JISX0208. An ASCII character is encoded | |
2802 | as is. A character of charset katakana-jisx0201 is encoded by | |
2803 | "position-code + 0x80". A character of charset japanese-jisx0208 | |
2804 | is encoded in 2-byte but two position-codes are divided and shifted | |
cfb43547 | 2805 | so that it fits in the range below. |
4ed46869 KH |
2806 | |
2807 | --- CODE RANGE of SJIS --- | |
2808 | (character set) (range) | |
2809 | ASCII 0x00 .. 0x7F | |
682169fe | 2810 | KATAKANA-JISX0201 0xA1 .. 0xDF |
c28a9453 | 2811 | JISX0208 (1st byte) 0x81 .. 0x9F and 0xE0 .. 0xEF |
d14d03ac | 2812 | (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC |
4ed46869 KH |
2813 | ------------------------------- |
2814 | ||
2815 | */ | |
2816 | ||
2817 | /* BIG5 is a coding system encoding two character sets: ASCII and | |
2818 | Big5. An ASCII character is encoded as is. Big5 is a two-byte | |
cfb43547 | 2819 | character set and is encoded in two bytes. |
4ed46869 KH |
2820 | |
2821 | --- CODE RANGE of BIG5 --- | |
2822 | (character set) (range) | |
2823 | ASCII 0x00 .. 0x7F | |
2824 | Big5 (1st byte) 0xA1 .. 0xFE | |
2825 | (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE | |
2826 | -------------------------- | |
2827 | ||
2828 | Since the number of characters in Big5 is larger than maximum | |
2829 | characters in Emacs' charset (96x96), it can't be handled as one | |
2830 | charset. So, in Emacs, Big5 is divided into two: `charset-big5-1' | |
2831 | and `charset-big5-2'. Both are DIMENSION2 and CHARS94. The former | |
2832 | contains frequently used characters and the latter contains less | |
2833 | frequently used characters. */ | |
2834 | ||
2835 | /* Macros to decode or encode a character of Big5 in BIG5. B1 and B2 | |
2836 | are the 1st and 2nd position-codes of Big5 in BIG5 coding system. | |
f458a8e0 | 2837 | C1 and C2 are the 1st and 2nd position-codes of Emacs' internal |
4ed46869 KH |
2838 | format. CHARSET is `charset_big5_1' or `charset_big5_2'. */ |
2839 | ||
2840 | /* Number of Big5 characters which have the same code in 1st byte. */ | |
2841 | #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40) | |
2842 | ||
2843 | #define DECODE_BIG5(b1, b2, charset, c1, c2) \ | |
2844 | do { \ | |
2845 | unsigned int temp \ | |
2846 | = (b1 - 0xA1) * BIG5_SAME_ROW + b2 - (b2 < 0x7F ? 0x40 : 0x62); \ | |
2847 | if (b1 < 0xC9) \ | |
2848 | charset = charset_big5_1; \ | |
2849 | else \ | |
2850 | { \ | |
2851 | charset = charset_big5_2; \ | |
2852 | temp -= (0xC9 - 0xA1) * BIG5_SAME_ROW; \ | |
2853 | } \ | |
2854 | c1 = temp / (0xFF - 0xA1) + 0x21; \ | |
2855 | c2 = temp % (0xFF - 0xA1) + 0x21; \ | |
2856 | } while (0) | |
2857 | ||
2858 | #define ENCODE_BIG5(charset, c1, c2, b1, b2) \ | |
2859 | do { \ | |
2860 | unsigned int temp = (c1 - 0x21) * (0xFF - 0xA1) + (c2 - 0x21); \ | |
2861 | if (charset == charset_big5_2) \ | |
2862 | temp += BIG5_SAME_ROW * (0xC9 - 0xA1); \ | |
2863 | b1 = temp / BIG5_SAME_ROW + 0xA1; \ | |
2864 | b2 = temp % BIG5_SAME_ROW; \ | |
2865 | b2 += b2 < 0x3F ? 0x40 : 0x62; \ | |
2866 | } while (0) | |
2867 | ||
2868 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2869 | Check if a text is encoded in SJIS. If it is, return | |
2870 | CODING_CATEGORY_MASK_SJIS, else return 0. */ | |
2871 | ||
0a28aafb KH |
2872 | static int |
2873 | detect_coding_sjis (src, src_end, multibytep) | |
4ed46869 | 2874 | unsigned char *src, *src_end; |
0a28aafb | 2875 | int multibytep; |
4ed46869 | 2876 | { |
b73bfc1c KH |
2877 | int c; |
2878 | /* Dummy for ONE_MORE_BYTE. */ | |
2879 | struct coding_system dummy_coding; | |
2880 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 2881 | |
b73bfc1c | 2882 | while (1) |
4ed46869 | 2883 | { |
0a28aafb | 2884 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
682169fe KH |
2885 | if (c < 0x80) |
2886 | continue; | |
2887 | if (c == 0x80 || c == 0xA0 || c > 0xEF) | |
2888 | return 0; | |
2889 | if (c <= 0x9F || c >= 0xE0) | |
4ed46869 | 2890 | { |
682169fe KH |
2891 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
2892 | if (c < 0x40 || c == 0x7F || c > 0xFC) | |
4ed46869 KH |
2893 | return 0; |
2894 | } | |
2895 | } | |
b73bfc1c | 2896 | label_end_of_loop: |
4ed46869 KH |
2897 | return CODING_CATEGORY_MASK_SJIS; |
2898 | } | |
2899 | ||
2900 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2901 | Check if a text is encoded in BIG5. If it is, return | |
2902 | CODING_CATEGORY_MASK_BIG5, else return 0. */ | |
2903 | ||
0a28aafb KH |
2904 | static int |
2905 | detect_coding_big5 (src, src_end, multibytep) | |
4ed46869 | 2906 | unsigned char *src, *src_end; |
0a28aafb | 2907 | int multibytep; |
4ed46869 | 2908 | { |
b73bfc1c KH |
2909 | int c; |
2910 | /* Dummy for ONE_MORE_BYTE. */ | |
2911 | struct coding_system dummy_coding; | |
2912 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 2913 | |
b73bfc1c | 2914 | while (1) |
4ed46869 | 2915 | { |
0a28aafb | 2916 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
682169fe KH |
2917 | if (c < 0x80) |
2918 | continue; | |
2919 | if (c < 0xA1 || c > 0xFE) | |
2920 | return 0; | |
2921 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); | |
2922 | if (c < 0x40 || (c > 0x7F && c < 0xA1) || c > 0xFE) | |
2923 | return 0; | |
4ed46869 | 2924 | } |
b73bfc1c | 2925 | label_end_of_loop: |
4ed46869 KH |
2926 | return CODING_CATEGORY_MASK_BIG5; |
2927 | } | |
2928 | ||
fa42c37f KH |
2929 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
2930 | Check if a text is encoded in UTF-8. If it is, return | |
2931 | CODING_CATEGORY_MASK_UTF_8, else return 0. */ | |
2932 | ||
2933 | #define UTF_8_1_OCTET_P(c) ((c) < 0x80) | |
2934 | #define UTF_8_EXTRA_OCTET_P(c) (((c) & 0xC0) == 0x80) | |
2935 | #define UTF_8_2_OCTET_LEADING_P(c) (((c) & 0xE0) == 0xC0) | |
2936 | #define UTF_8_3_OCTET_LEADING_P(c) (((c) & 0xF0) == 0xE0) | |
2937 | #define UTF_8_4_OCTET_LEADING_P(c) (((c) & 0xF8) == 0xF0) | |
2938 | #define UTF_8_5_OCTET_LEADING_P(c) (((c) & 0xFC) == 0xF8) | |
2939 | #define UTF_8_6_OCTET_LEADING_P(c) (((c) & 0xFE) == 0xFC) | |
2940 | ||
0a28aafb KH |
2941 | static int |
2942 | detect_coding_utf_8 (src, src_end, multibytep) | |
fa42c37f | 2943 | unsigned char *src, *src_end; |
0a28aafb | 2944 | int multibytep; |
fa42c37f KH |
2945 | { |
2946 | unsigned char c; | |
2947 | int seq_maybe_bytes; | |
b73bfc1c KH |
2948 | /* Dummy for ONE_MORE_BYTE. */ |
2949 | struct coding_system dummy_coding; | |
2950 | struct coding_system *coding = &dummy_coding; | |
fa42c37f | 2951 | |
b73bfc1c | 2952 | while (1) |
fa42c37f | 2953 | { |
0a28aafb | 2954 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
fa42c37f KH |
2955 | if (UTF_8_1_OCTET_P (c)) |
2956 | continue; | |
2957 | else if (UTF_8_2_OCTET_LEADING_P (c)) | |
2958 | seq_maybe_bytes = 1; | |
2959 | else if (UTF_8_3_OCTET_LEADING_P (c)) | |
2960 | seq_maybe_bytes = 2; | |
2961 | else if (UTF_8_4_OCTET_LEADING_P (c)) | |
2962 | seq_maybe_bytes = 3; | |
2963 | else if (UTF_8_5_OCTET_LEADING_P (c)) | |
2964 | seq_maybe_bytes = 4; | |
2965 | else if (UTF_8_6_OCTET_LEADING_P (c)) | |
2966 | seq_maybe_bytes = 5; | |
2967 | else | |
2968 | return 0; | |
2969 | ||
2970 | do | |
2971 | { | |
0a28aafb | 2972 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
fa42c37f KH |
2973 | if (!UTF_8_EXTRA_OCTET_P (c)) |
2974 | return 0; | |
2975 | seq_maybe_bytes--; | |
2976 | } | |
2977 | while (seq_maybe_bytes > 0); | |
2978 | } | |
2979 | ||
b73bfc1c | 2980 | label_end_of_loop: |
fa42c37f KH |
2981 | return CODING_CATEGORY_MASK_UTF_8; |
2982 | } | |
2983 | ||
2984 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2985 | Check if a text is encoded in UTF-16 Big Endian (endian == 1) or | |
2986 | Little Endian (otherwise). If it is, return | |
2987 | CODING_CATEGORY_MASK_UTF_16_BE or CODING_CATEGORY_MASK_UTF_16_LE, | |
2988 | else return 0. */ | |
2989 | ||
2990 | #define UTF_16_INVALID_P(val) \ | |
2991 | (((val) == 0xFFFE) \ | |
2992 | || ((val) == 0xFFFF)) | |
2993 | ||
2994 | #define UTF_16_HIGH_SURROGATE_P(val) \ | |
2995 | (((val) & 0xD800) == 0xD800) | |
2996 | ||
2997 | #define UTF_16_LOW_SURROGATE_P(val) \ | |
2998 | (((val) & 0xDC00) == 0xDC00) | |
2999 | ||
0a28aafb KH |
3000 | static int |
3001 | detect_coding_utf_16 (src, src_end, multibytep) | |
fa42c37f | 3002 | unsigned char *src, *src_end; |
0a28aafb | 3003 | int multibytep; |
fa42c37f | 3004 | { |
b73bfc1c | 3005 | unsigned char c1, c2; |
1c7457e2 | 3006 | /* Dummy for ONE_MORE_BYTE_CHECK_MULTIBYTE. */ |
b73bfc1c KH |
3007 | struct coding_system dummy_coding; |
3008 | struct coding_system *coding = &dummy_coding; | |
fa42c37f | 3009 | |
0a28aafb KH |
3010 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
3011 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c2, multibytep); | |
b73bfc1c KH |
3012 | |
3013 | if ((c1 == 0xFF) && (c2 == 0xFE)) | |
fa42c37f | 3014 | return CODING_CATEGORY_MASK_UTF_16_LE; |
b73bfc1c | 3015 | else if ((c1 == 0xFE) && (c2 == 0xFF)) |
fa42c37f KH |
3016 | return CODING_CATEGORY_MASK_UTF_16_BE; |
3017 | ||
b73bfc1c | 3018 | label_end_of_loop: |
fa42c37f KH |
3019 | return 0; |
3020 | } | |
3021 | ||
4ed46869 KH |
3022 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". |
3023 | If SJIS_P is 1, decode SJIS text, else decode BIG5 test. */ | |
3024 | ||
b73bfc1c | 3025 | static void |
4ed46869 | 3026 | decode_coding_sjis_big5 (coding, source, destination, |
d46c5b12 | 3027 | src_bytes, dst_bytes, sjis_p) |
4ed46869 KH |
3028 | struct coding_system *coding; |
3029 | unsigned char *source, *destination; | |
3030 | int src_bytes, dst_bytes; | |
4ed46869 KH |
3031 | int sjis_p; |
3032 | { | |
3033 | unsigned char *src = source; | |
3034 | unsigned char *src_end = source + src_bytes; | |
3035 | unsigned char *dst = destination; | |
3036 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c KH |
3037 | /* SRC_BASE remembers the start position in source in each loop. |
3038 | The loop will be exited when there's not enough source code | |
3039 | (within macro ONE_MORE_BYTE), or when there's not enough | |
3040 | destination area to produce a character (within macro | |
3041 | EMIT_CHAR). */ | |
3042 | unsigned char *src_base; | |
3043 | Lisp_Object translation_table; | |
a5d301df | 3044 | |
b73bfc1c KH |
3045 | if (NILP (Venable_character_translation)) |
3046 | translation_table = Qnil; | |
3047 | else | |
3048 | { | |
3049 | translation_table = coding->translation_table_for_decode; | |
3050 | if (NILP (translation_table)) | |
3051 | translation_table = Vstandard_translation_table_for_decode; | |
3052 | } | |
4ed46869 | 3053 | |
d46c5b12 | 3054 | coding->produced_char = 0; |
b73bfc1c | 3055 | while (1) |
4ed46869 | 3056 | { |
85478bc6 | 3057 | int c, charset, c1, c2 = 0; |
b73bfc1c KH |
3058 | |
3059 | src_base = src; | |
3060 | ONE_MORE_BYTE (c1); | |
3061 | ||
3062 | if (c1 < 0x80) | |
4ed46869 | 3063 | { |
b73bfc1c KH |
3064 | charset = CHARSET_ASCII; |
3065 | if (c1 < 0x20) | |
4ed46869 | 3066 | { |
b73bfc1c | 3067 | if (c1 == '\r') |
d46c5b12 | 3068 | { |
b73bfc1c | 3069 | if (coding->eol_type == CODING_EOL_CRLF) |
d46c5b12 | 3070 | { |
b73bfc1c KH |
3071 | ONE_MORE_BYTE (c2); |
3072 | if (c2 == '\n') | |
3073 | c1 = c2; | |
b73bfc1c KH |
3074 | else |
3075 | /* To process C2 again, SRC is subtracted by 1. */ | |
3076 | src--; | |
d46c5b12 | 3077 | } |
b73bfc1c KH |
3078 | else if (coding->eol_type == CODING_EOL_CR) |
3079 | c1 = '\n'; | |
3080 | } | |
3081 | else if (c1 == '\n' | |
3082 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
3083 | && (coding->eol_type == CODING_EOL_CR | |
3084 | || coding->eol_type == CODING_EOL_CRLF)) | |
3085 | { | |
3086 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
3087 | goto label_end_of_loop; | |
d46c5b12 | 3088 | } |
4ed46869 | 3089 | } |
4ed46869 | 3090 | } |
54f78171 | 3091 | else |
b73bfc1c | 3092 | { |
4ed46869 KH |
3093 | if (sjis_p) |
3094 | { | |
682169fe | 3095 | if (c1 == 0x80 || c1 == 0xA0 || c1 > 0xEF) |
b73bfc1c | 3096 | goto label_invalid_code; |
682169fe | 3097 | if (c1 <= 0x9F || c1 >= 0xE0) |
fb88bf2d | 3098 | { |
54f78171 KH |
3099 | /* SJIS -> JISX0208 */ |
3100 | ONE_MORE_BYTE (c2); | |
b73bfc1c KH |
3101 | if (c2 < 0x40 || c2 == 0x7F || c2 > 0xFC) |
3102 | goto label_invalid_code; | |
3103 | DECODE_SJIS (c1, c2, c1, c2); | |
3104 | charset = charset_jisx0208; | |
5e34de15 | 3105 | } |
fb88bf2d | 3106 | else |
b73bfc1c KH |
3107 | /* SJIS -> JISX0201-Kana */ |
3108 | charset = charset_katakana_jisx0201; | |
4ed46869 | 3109 | } |
fb88bf2d | 3110 | else |
fb88bf2d | 3111 | { |
54f78171 | 3112 | /* BIG5 -> Big5 */ |
682169fe | 3113 | if (c1 < 0xA0 || c1 > 0xFE) |
b73bfc1c KH |
3114 | goto label_invalid_code; |
3115 | ONE_MORE_BYTE (c2); | |
3116 | if (c2 < 0x40 || (c2 > 0x7E && c2 < 0xA1) || c2 > 0xFE) | |
3117 | goto label_invalid_code; | |
3118 | DECODE_BIG5 (c1, c2, charset, c1, c2); | |
4ed46869 KH |
3119 | } |
3120 | } | |
4ed46869 | 3121 | |
b73bfc1c KH |
3122 | c = DECODE_ISO_CHARACTER (charset, c1, c2); |
3123 | EMIT_CHAR (c); | |
fb88bf2d KH |
3124 | continue; |
3125 | ||
b73bfc1c KH |
3126 | label_invalid_code: |
3127 | coding->errors++; | |
4ed46869 | 3128 | src = src_base; |
b73bfc1c KH |
3129 | c = *src++; |
3130 | EMIT_CHAR (c); | |
fb88bf2d | 3131 | } |
d46c5b12 | 3132 | |
b73bfc1c KH |
3133 | label_end_of_loop: |
3134 | coding->consumed = coding->consumed_char = src_base - source; | |
d46c5b12 | 3135 | coding->produced = dst - destination; |
b73bfc1c | 3136 | return; |
4ed46869 KH |
3137 | } |
3138 | ||
3139 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". | |
b73bfc1c KH |
3140 | This function can encode charsets `ascii', `katakana-jisx0201', |
3141 | `japanese-jisx0208', `chinese-big5-1', and `chinese-big5-2'. We | |
3142 | are sure that all these charsets are registered as official charset | |
4ed46869 KH |
3143 | (i.e. do not have extended leading-codes). Characters of other |
3144 | charsets are produced without any encoding. If SJIS_P is 1, encode | |
3145 | SJIS text, else encode BIG5 text. */ | |
3146 | ||
b73bfc1c | 3147 | static void |
4ed46869 | 3148 | encode_coding_sjis_big5 (coding, source, destination, |
d46c5b12 | 3149 | src_bytes, dst_bytes, sjis_p) |
4ed46869 KH |
3150 | struct coding_system *coding; |
3151 | unsigned char *source, *destination; | |
3152 | int src_bytes, dst_bytes; | |
4ed46869 KH |
3153 | int sjis_p; |
3154 | { | |
3155 | unsigned char *src = source; | |
3156 | unsigned char *src_end = source + src_bytes; | |
3157 | unsigned char *dst = destination; | |
3158 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c KH |
3159 | /* SRC_BASE remembers the start position in source in each loop. |
3160 | The loop will be exited when there's not enough source text to | |
3161 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
3162 | there's not enough destination area to produce encoded codes | |
3163 | (within macro EMIT_BYTES). */ | |
3164 | unsigned char *src_base; | |
3165 | Lisp_Object translation_table; | |
4ed46869 | 3166 | |
b73bfc1c KH |
3167 | if (NILP (Venable_character_translation)) |
3168 | translation_table = Qnil; | |
3169 | else | |
4ed46869 | 3170 | { |
39658efc | 3171 | translation_table = coding->translation_table_for_encode; |
b73bfc1c | 3172 | if (NILP (translation_table)) |
39658efc | 3173 | translation_table = Vstandard_translation_table_for_encode; |
b73bfc1c | 3174 | } |
a5d301df | 3175 | |
b73bfc1c KH |
3176 | while (1) |
3177 | { | |
3178 | int c, charset, c1, c2; | |
4ed46869 | 3179 | |
b73bfc1c KH |
3180 | src_base = src; |
3181 | ONE_MORE_CHAR (c); | |
93dec019 | 3182 | |
b73bfc1c KH |
3183 | /* Now encode the character C. */ |
3184 | if (SINGLE_BYTE_CHAR_P (c)) | |
3185 | { | |
3186 | switch (c) | |
4ed46869 | 3187 | { |
b73bfc1c | 3188 | case '\r': |
7371fe0a | 3189 | if (!(coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) |
b73bfc1c KH |
3190 | { |
3191 | EMIT_ONE_BYTE (c); | |
3192 | break; | |
3193 | } | |
3194 | c = '\n'; | |
3195 | case '\n': | |
3196 | if (coding->eol_type == CODING_EOL_CRLF) | |
3197 | { | |
3198 | EMIT_TWO_BYTES ('\r', c); | |
3199 | break; | |
3200 | } | |
3201 | else if (coding->eol_type == CODING_EOL_CR) | |
3202 | c = '\r'; | |
3203 | default: | |
3204 | EMIT_ONE_BYTE (c); | |
3205 | } | |
3206 | } | |
3207 | else | |
3208 | { | |
3209 | SPLIT_CHAR (c, charset, c1, c2); | |
3210 | if (sjis_p) | |
3211 | { | |
3212 | if (charset == charset_jisx0208 | |
3213 | || charset == charset_jisx0208_1978) | |
3214 | { | |
3215 | ENCODE_SJIS (c1, c2, c1, c2); | |
3216 | EMIT_TWO_BYTES (c1, c2); | |
3217 | } | |
39658efc KH |
3218 | else if (charset == charset_katakana_jisx0201) |
3219 | EMIT_ONE_BYTE (c1 | 0x80); | |
fc53a214 KH |
3220 | else if (charset == charset_latin_jisx0201) |
3221 | EMIT_ONE_BYTE (c1); | |
0eecad43 KH |
3222 | else if (coding->mode & CODING_MODE_INHIBIT_UNENCODABLE_CHAR) |
3223 | { | |
3224 | EMIT_ONE_BYTE (CODING_REPLACEMENT_CHARACTER); | |
3225 | if (CHARSET_WIDTH (charset) > 1) | |
3226 | EMIT_ONE_BYTE (CODING_REPLACEMENT_CHARACTER); | |
3227 | } | |
b73bfc1c KH |
3228 | else |
3229 | /* There's no way other than producing the internal | |
3230 | codes as is. */ | |
3231 | EMIT_BYTES (src_base, src); | |
4ed46869 | 3232 | } |
4ed46869 | 3233 | else |
b73bfc1c KH |
3234 | { |
3235 | if (charset == charset_big5_1 || charset == charset_big5_2) | |
3236 | { | |
3237 | ENCODE_BIG5 (charset, c1, c2, c1, c2); | |
3238 | EMIT_TWO_BYTES (c1, c2); | |
3239 | } | |
0eecad43 KH |
3240 | else if (coding->mode & CODING_MODE_INHIBIT_UNENCODABLE_CHAR) |
3241 | { | |
3242 | EMIT_ONE_BYTE (CODING_REPLACEMENT_CHARACTER); | |
3243 | if (CHARSET_WIDTH (charset) > 1) | |
3244 | EMIT_ONE_BYTE (CODING_REPLACEMENT_CHARACTER); | |
3245 | } | |
b73bfc1c KH |
3246 | else |
3247 | /* There's no way other than producing the internal | |
3248 | codes as is. */ | |
3249 | EMIT_BYTES (src_base, src); | |
3250 | } | |
4ed46869 | 3251 | } |
b73bfc1c | 3252 | coding->consumed_char++; |
4ed46869 KH |
3253 | } |
3254 | ||
b73bfc1c KH |
3255 | label_end_of_loop: |
3256 | coding->consumed = src_base - source; | |
d46c5b12 | 3257 | coding->produced = coding->produced_char = dst - destination; |
4ed46869 KH |
3258 | } |
3259 | ||
3260 | \f | |
1397dc18 KH |
3261 | /*** 5. CCL handlers ***/ |
3262 | ||
3263 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3264 | Check if a text is encoded in a coding system of which | |
3265 | encoder/decoder are written in CCL program. If it is, return | |
3266 | CODING_CATEGORY_MASK_CCL, else return 0. */ | |
3267 | ||
0a28aafb KH |
3268 | static int |
3269 | detect_coding_ccl (src, src_end, multibytep) | |
1397dc18 | 3270 | unsigned char *src, *src_end; |
0a28aafb | 3271 | int multibytep; |
1397dc18 KH |
3272 | { |
3273 | unsigned char *valid; | |
b73bfc1c KH |
3274 | int c; |
3275 | /* Dummy for ONE_MORE_BYTE. */ | |
3276 | struct coding_system dummy_coding; | |
3277 | struct coding_system *coding = &dummy_coding; | |
1397dc18 KH |
3278 | |
3279 | /* No coding system is assigned to coding-category-ccl. */ | |
3280 | if (!coding_system_table[CODING_CATEGORY_IDX_CCL]) | |
3281 | return 0; | |
3282 | ||
3283 | valid = coding_system_table[CODING_CATEGORY_IDX_CCL]->spec.ccl.valid_codes; | |
b73bfc1c | 3284 | while (1) |
1397dc18 | 3285 | { |
0a28aafb | 3286 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
b73bfc1c KH |
3287 | if (! valid[c]) |
3288 | return 0; | |
1397dc18 | 3289 | } |
b73bfc1c | 3290 | label_end_of_loop: |
1397dc18 KH |
3291 | return CODING_CATEGORY_MASK_CCL; |
3292 | } | |
3293 | ||
3294 | \f | |
3295 | /*** 6. End-of-line handlers ***/ | |
4ed46869 | 3296 | |
b73bfc1c | 3297 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
4ed46869 | 3298 | |
b73bfc1c | 3299 | static void |
d46c5b12 | 3300 | decode_eol (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
3301 | struct coding_system *coding; |
3302 | unsigned char *source, *destination; | |
3303 | int src_bytes, dst_bytes; | |
4ed46869 KH |
3304 | { |
3305 | unsigned char *src = source; | |
4ed46869 | 3306 | unsigned char *dst = destination; |
b73bfc1c KH |
3307 | unsigned char *src_end = src + src_bytes; |
3308 | unsigned char *dst_end = dst + dst_bytes; | |
3309 | Lisp_Object translation_table; | |
3310 | /* SRC_BASE remembers the start position in source in each loop. | |
3311 | The loop will be exited when there's not enough source code | |
3312 | (within macro ONE_MORE_BYTE), or when there's not enough | |
3313 | destination area to produce a character (within macro | |
3314 | EMIT_CHAR). */ | |
3315 | unsigned char *src_base; | |
3316 | int c; | |
3317 | ||
3318 | translation_table = Qnil; | |
4ed46869 KH |
3319 | switch (coding->eol_type) |
3320 | { | |
3321 | case CODING_EOL_CRLF: | |
b73bfc1c | 3322 | while (1) |
d46c5b12 | 3323 | { |
b73bfc1c KH |
3324 | src_base = src; |
3325 | ONE_MORE_BYTE (c); | |
3326 | if (c == '\r') | |
fb88bf2d | 3327 | { |
b73bfc1c KH |
3328 | ONE_MORE_BYTE (c); |
3329 | if (c != '\n') | |
3330 | { | |
b73bfc1c KH |
3331 | src--; |
3332 | c = '\r'; | |
3333 | } | |
fb88bf2d | 3334 | } |
b73bfc1c KH |
3335 | else if (c == '\n' |
3336 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL)) | |
d46c5b12 | 3337 | { |
b73bfc1c KH |
3338 | coding->result = CODING_FINISH_INCONSISTENT_EOL; |
3339 | goto label_end_of_loop; | |
d46c5b12 | 3340 | } |
b73bfc1c | 3341 | EMIT_CHAR (c); |
d46c5b12 | 3342 | } |
b73bfc1c KH |
3343 | break; |
3344 | ||
3345 | case CODING_EOL_CR: | |
3346 | while (1) | |
d46c5b12 | 3347 | { |
b73bfc1c KH |
3348 | src_base = src; |
3349 | ONE_MORE_BYTE (c); | |
3350 | if (c == '\n') | |
3351 | { | |
3352 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
3353 | { | |
3354 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
3355 | goto label_end_of_loop; | |
3356 | } | |
3357 | } | |
3358 | else if (c == '\r') | |
3359 | c = '\n'; | |
3360 | EMIT_CHAR (c); | |
d46c5b12 | 3361 | } |
4ed46869 KH |
3362 | break; |
3363 | ||
b73bfc1c KH |
3364 | default: /* no need for EOL handling */ |
3365 | while (1) | |
d46c5b12 | 3366 | { |
b73bfc1c KH |
3367 | src_base = src; |
3368 | ONE_MORE_BYTE (c); | |
3369 | EMIT_CHAR (c); | |
d46c5b12 | 3370 | } |
4ed46869 KH |
3371 | } |
3372 | ||
b73bfc1c KH |
3373 | label_end_of_loop: |
3374 | coding->consumed = coding->consumed_char = src_base - source; | |
3375 | coding->produced = dst - destination; | |
3376 | return; | |
4ed46869 KH |
3377 | } |
3378 | ||
3379 | /* See "GENERAL NOTES about `encode_coding_XXX ()' functions". Encode | |
b73bfc1c | 3380 | format of end-of-line according to `coding->eol_type'. It also |
8ca3766a | 3381 | convert multibyte form 8-bit characters to unibyte if |
b73bfc1c KH |
3382 | CODING->src_multibyte is nonzero. If `coding->mode & |
3383 | CODING_MODE_SELECTIVE_DISPLAY' is nonzero, code '\r' in source text | |
3384 | also means end-of-line. */ | |
4ed46869 | 3385 | |
b73bfc1c | 3386 | static void |
d46c5b12 | 3387 | encode_eol (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 3388 | struct coding_system *coding; |
a4244313 KR |
3389 | const unsigned char *source; |
3390 | unsigned char *destination; | |
4ed46869 | 3391 | int src_bytes, dst_bytes; |
4ed46869 | 3392 | { |
a4244313 | 3393 | const unsigned char *src = source; |
4ed46869 | 3394 | unsigned char *dst = destination; |
a4244313 | 3395 | const unsigned char *src_end = src + src_bytes; |
b73bfc1c KH |
3396 | unsigned char *dst_end = dst + dst_bytes; |
3397 | Lisp_Object translation_table; | |
3398 | /* SRC_BASE remembers the start position in source in each loop. | |
3399 | The loop will be exited when there's not enough source text to | |
3400 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
3401 | there's not enough destination area to produce encoded codes | |
3402 | (within macro EMIT_BYTES). */ | |
a4244313 KR |
3403 | const unsigned char *src_base; |
3404 | unsigned char *tmp; | |
b73bfc1c KH |
3405 | int c; |
3406 | int selective_display = coding->mode & CODING_MODE_SELECTIVE_DISPLAY; | |
3407 | ||
3408 | translation_table = Qnil; | |
3409 | if (coding->src_multibyte | |
3410 | && *(src_end - 1) == LEADING_CODE_8_BIT_CONTROL) | |
3411 | { | |
3412 | src_end--; | |
3413 | src_bytes--; | |
3414 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; | |
3415 | } | |
fb88bf2d | 3416 | |
d46c5b12 KH |
3417 | if (coding->eol_type == CODING_EOL_CRLF) |
3418 | { | |
b73bfc1c | 3419 | while (src < src_end) |
d46c5b12 | 3420 | { |
b73bfc1c | 3421 | src_base = src; |
d46c5b12 | 3422 | c = *src++; |
b73bfc1c KH |
3423 | if (c >= 0x20) |
3424 | EMIT_ONE_BYTE (c); | |
3425 | else if (c == '\n' || (c == '\r' && selective_display)) | |
3426 | EMIT_TWO_BYTES ('\r', '\n'); | |
d46c5b12 | 3427 | else |
b73bfc1c | 3428 | EMIT_ONE_BYTE (c); |
d46c5b12 | 3429 | } |
ff2b1ea9 | 3430 | src_base = src; |
b73bfc1c | 3431 | label_end_of_loop: |
005f0d35 | 3432 | ; |
d46c5b12 KH |
3433 | } |
3434 | else | |
4ed46869 | 3435 | { |
78a629d2 | 3436 | if (!dst_bytes || src_bytes <= dst_bytes) |
4ed46869 | 3437 | { |
b73bfc1c KH |
3438 | safe_bcopy (src, dst, src_bytes); |
3439 | src_base = src_end; | |
3440 | dst += src_bytes; | |
d46c5b12 | 3441 | } |
d46c5b12 | 3442 | else |
b73bfc1c KH |
3443 | { |
3444 | if (coding->src_multibyte | |
3445 | && *(src + dst_bytes - 1) == LEADING_CODE_8_BIT_CONTROL) | |
3446 | dst_bytes--; | |
3447 | safe_bcopy (src, dst, dst_bytes); | |
3448 | src_base = src + dst_bytes; | |
3449 | dst = destination + dst_bytes; | |
3450 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
3451 | } | |
993824c9 | 3452 | if (coding->eol_type == CODING_EOL_CR) |
d46c5b12 | 3453 | { |
a4244313 KR |
3454 | for (tmp = destination; tmp < dst; tmp++) |
3455 | if (*tmp == '\n') *tmp = '\r'; | |
d46c5b12 | 3456 | } |
b73bfc1c | 3457 | else if (selective_display) |
d46c5b12 | 3458 | { |
a4244313 KR |
3459 | for (tmp = destination; tmp < dst; tmp++) |
3460 | if (*tmp == '\r') *tmp = '\n'; | |
4ed46869 | 3461 | } |
4ed46869 | 3462 | } |
b73bfc1c KH |
3463 | if (coding->src_multibyte) |
3464 | dst = destination + str_as_unibyte (destination, dst - destination); | |
4ed46869 | 3465 | |
b73bfc1c KH |
3466 | coding->consumed = src_base - source; |
3467 | coding->produced = dst - destination; | |
78a629d2 | 3468 | coding->produced_char = coding->produced; |
4ed46869 KH |
3469 | } |
3470 | ||
3471 | \f | |
1397dc18 | 3472 | /*** 7. C library functions ***/ |
4ed46869 | 3473 | |
cfb43547 | 3474 | /* In Emacs Lisp, a coding system is represented by a Lisp symbol which |
4ed46869 | 3475 | has a property `coding-system'. The value of this property is a |
cfb43547 | 3476 | vector of length 5 (called the coding-vector). Among elements of |
4ed46869 KH |
3477 | this vector, the first (element[0]) and the fifth (element[4]) |
3478 | carry important information for decoding/encoding. Before | |
3479 | decoding/encoding, this information should be set in fields of a | |
3480 | structure of type `coding_system'. | |
3481 | ||
cfb43547 | 3482 | The value of the property `coding-system' can be a symbol of another |
4ed46869 KH |
3483 | subsidiary coding-system. In that case, Emacs gets coding-vector |
3484 | from that symbol. | |
3485 | ||
3486 | `element[0]' contains information to be set in `coding->type'. The | |
3487 | value and its meaning is as follows: | |
3488 | ||
0ef69138 KH |
3489 | 0 -- coding_type_emacs_mule |
3490 | 1 -- coding_type_sjis | |
3491 | 2 -- coding_type_iso2022 | |
3492 | 3 -- coding_type_big5 | |
3493 | 4 -- coding_type_ccl encoder/decoder written in CCL | |
3494 | nil -- coding_type_no_conversion | |
3495 | t -- coding_type_undecided (automatic conversion on decoding, | |
3496 | no-conversion on encoding) | |
4ed46869 KH |
3497 | |
3498 | `element[4]' contains information to be set in `coding->flags' and | |
3499 | `coding->spec'. The meaning varies by `coding->type'. | |
3500 | ||
3501 | If `coding->type' is `coding_type_iso2022', element[4] is a vector | |
3502 | of length 32 (of which the first 13 sub-elements are used now). | |
3503 | Meanings of these sub-elements are: | |
3504 | ||
3505 | sub-element[N] where N is 0 through 3: to be set in `coding->spec.iso2022' | |
3506 | If the value is an integer of valid charset, the charset is | |
3507 | assumed to be designated to graphic register N initially. | |
3508 | ||
3509 | If the value is minus, it is a minus value of charset which | |
3510 | reserves graphic register N, which means that the charset is | |
3511 | not designated initially but should be designated to graphic | |
3512 | register N just before encoding a character in that charset. | |
3513 | ||
3514 | If the value is nil, graphic register N is never used on | |
3515 | encoding. | |
93dec019 | 3516 | |
4ed46869 KH |
3517 | sub-element[N] where N is 4 through 11: to be set in `coding->flags' |
3518 | Each value takes t or nil. See the section ISO2022 of | |
3519 | `coding.h' for more information. | |
3520 | ||
3521 | If `coding->type' is `coding_type_big5', element[4] is t to denote | |
3522 | BIG5-ETen or nil to denote BIG5-HKU. | |
3523 | ||
3524 | If `coding->type' takes the other value, element[4] is ignored. | |
3525 | ||
cfb43547 | 3526 | Emacs Lisp's coding systems also carry information about format of |
4ed46869 KH |
3527 | end-of-line in a value of property `eol-type'. If the value is |
3528 | integer, 0 means CODING_EOL_LF, 1 means CODING_EOL_CRLF, and 2 | |
3529 | means CODING_EOL_CR. If it is not integer, it should be a vector | |
3530 | of subsidiary coding systems of which property `eol-type' has one | |
cfb43547 | 3531 | of the above values. |
4ed46869 KH |
3532 | |
3533 | */ | |
3534 | ||
3535 | /* Extract information for decoding/encoding from CODING_SYSTEM_SYMBOL | |
3536 | and set it in CODING. If CODING_SYSTEM_SYMBOL is invalid, CODING | |
3537 | is setup so that no conversion is necessary and return -1, else | |
3538 | return 0. */ | |
3539 | ||
3540 | int | |
e0e989f6 KH |
3541 | setup_coding_system (coding_system, coding) |
3542 | Lisp_Object coding_system; | |
4ed46869 KH |
3543 | struct coding_system *coding; |
3544 | { | |
d46c5b12 | 3545 | Lisp_Object coding_spec, coding_type, eol_type, plist; |
4608c386 | 3546 | Lisp_Object val; |
4ed46869 | 3547 | |
c07c8e12 KH |
3548 | /* At first, zero clear all members. */ |
3549 | bzero (coding, sizeof (struct coding_system)); | |
3550 | ||
d46c5b12 | 3551 | /* Initialize some fields required for all kinds of coding systems. */ |
774324d6 | 3552 | coding->symbol = coding_system; |
d46c5b12 KH |
3553 | coding->heading_ascii = -1; |
3554 | coding->post_read_conversion = coding->pre_write_conversion = Qnil; | |
ec6d2bb8 KH |
3555 | coding->composing = COMPOSITION_DISABLED; |
3556 | coding->cmp_data = NULL; | |
1f5dbf34 KH |
3557 | |
3558 | if (NILP (coding_system)) | |
3559 | goto label_invalid_coding_system; | |
3560 | ||
4608c386 | 3561 | coding_spec = Fget (coding_system, Qcoding_system); |
1f5dbf34 | 3562 | |
4608c386 KH |
3563 | if (!VECTORP (coding_spec) |
3564 | || XVECTOR (coding_spec)->size != 5 | |
3565 | || !CONSP (XVECTOR (coding_spec)->contents[3])) | |
4ed46869 | 3566 | goto label_invalid_coding_system; |
4608c386 | 3567 | |
d46c5b12 KH |
3568 | eol_type = inhibit_eol_conversion ? Qnil : Fget (coding_system, Qeol_type); |
3569 | if (VECTORP (eol_type)) | |
3570 | { | |
3571 | coding->eol_type = CODING_EOL_UNDECIDED; | |
3572 | coding->common_flags = CODING_REQUIRE_DETECTION_MASK; | |
3573 | } | |
3574 | else if (XFASTINT (eol_type) == 1) | |
3575 | { | |
3576 | coding->eol_type = CODING_EOL_CRLF; | |
3577 | coding->common_flags | |
3578 | = CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
3579 | } | |
3580 | else if (XFASTINT (eol_type) == 2) | |
3581 | { | |
3582 | coding->eol_type = CODING_EOL_CR; | |
3583 | coding->common_flags | |
3584 | = CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
3585 | } | |
3586 | else | |
3587 | coding->eol_type = CODING_EOL_LF; | |
3588 | ||
3589 | coding_type = XVECTOR (coding_spec)->contents[0]; | |
3590 | /* Try short cut. */ | |
3591 | if (SYMBOLP (coding_type)) | |
3592 | { | |
3593 | if (EQ (coding_type, Qt)) | |
3594 | { | |
3595 | coding->type = coding_type_undecided; | |
3596 | coding->common_flags |= CODING_REQUIRE_DETECTION_MASK; | |
3597 | } | |
3598 | else | |
3599 | coding->type = coding_type_no_conversion; | |
9b96232f KH |
3600 | /* Initialize this member. Any thing other than |
3601 | CODING_CATEGORY_IDX_UTF_16_BE and | |
3602 | CODING_CATEGORY_IDX_UTF_16_LE are ok because they have | |
3603 | special treatment in detect_eol. */ | |
3604 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
3605 | ||
d46c5b12 KH |
3606 | return 0; |
3607 | } | |
3608 | ||
d46c5b12 KH |
3609 | /* Get values of coding system properties: |
3610 | `post-read-conversion', `pre-write-conversion', | |
f967223b | 3611 | `translation-table-for-decode', `translation-table-for-encode'. */ |
4608c386 | 3612 | plist = XVECTOR (coding_spec)->contents[3]; |
b843d1ae | 3613 | /* Pre & post conversion functions should be disabled if |
8ca3766a | 3614 | inhibit_eol_conversion is nonzero. This is the case that a code |
b843d1ae KH |
3615 | conversion function is called while those functions are running. */ |
3616 | if (! inhibit_pre_post_conversion) | |
3617 | { | |
3618 | coding->post_read_conversion = Fplist_get (plist, Qpost_read_conversion); | |
3619 | coding->pre_write_conversion = Fplist_get (plist, Qpre_write_conversion); | |
3620 | } | |
f967223b | 3621 | val = Fplist_get (plist, Qtranslation_table_for_decode); |
4608c386 | 3622 | if (SYMBOLP (val)) |
f967223b KH |
3623 | val = Fget (val, Qtranslation_table_for_decode); |
3624 | coding->translation_table_for_decode = CHAR_TABLE_P (val) ? val : Qnil; | |
3625 | val = Fplist_get (plist, Qtranslation_table_for_encode); | |
4608c386 | 3626 | if (SYMBOLP (val)) |
f967223b KH |
3627 | val = Fget (val, Qtranslation_table_for_encode); |
3628 | coding->translation_table_for_encode = CHAR_TABLE_P (val) ? val : Qnil; | |
d46c5b12 KH |
3629 | val = Fplist_get (plist, Qcoding_category); |
3630 | if (!NILP (val)) | |
3631 | { | |
3632 | val = Fget (val, Qcoding_category_index); | |
3633 | if (INTEGERP (val)) | |
3634 | coding->category_idx = XINT (val); | |
3635 | else | |
3636 | goto label_invalid_coding_system; | |
3637 | } | |
3638 | else | |
3639 | goto label_invalid_coding_system; | |
93dec019 | 3640 | |
ec6d2bb8 KH |
3641 | /* If the coding system has non-nil `composition' property, enable |
3642 | composition handling. */ | |
3643 | val = Fplist_get (plist, Qcomposition); | |
3644 | if (!NILP (val)) | |
3645 | coding->composing = COMPOSITION_NO; | |
3646 | ||
d46c5b12 | 3647 | switch (XFASTINT (coding_type)) |
4ed46869 KH |
3648 | { |
3649 | case 0: | |
0ef69138 | 3650 | coding->type = coding_type_emacs_mule; |
aa72b389 KH |
3651 | coding->common_flags |
3652 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
c952af22 KH |
3653 | if (!NILP (coding->post_read_conversion)) |
3654 | coding->common_flags |= CODING_REQUIRE_DECODING_MASK; | |
3655 | if (!NILP (coding->pre_write_conversion)) | |
3656 | coding->common_flags |= CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 KH |
3657 | break; |
3658 | ||
3659 | case 1: | |
3660 | coding->type = coding_type_sjis; | |
c952af22 KH |
3661 | coding->common_flags |
3662 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 KH |
3663 | break; |
3664 | ||
3665 | case 2: | |
3666 | coding->type = coding_type_iso2022; | |
c952af22 KH |
3667 | coding->common_flags |
3668 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3669 | { |
70c22245 | 3670 | Lisp_Object val, temp; |
4ed46869 | 3671 | Lisp_Object *flags; |
d46c5b12 | 3672 | int i, charset, reg_bits = 0; |
4ed46869 | 3673 | |
4608c386 | 3674 | val = XVECTOR (coding_spec)->contents[4]; |
f44d27ce | 3675 | |
4ed46869 KH |
3676 | if (!VECTORP (val) || XVECTOR (val)->size != 32) |
3677 | goto label_invalid_coding_system; | |
3678 | ||
3679 | flags = XVECTOR (val)->contents; | |
3680 | coding->flags | |
3681 | = ((NILP (flags[4]) ? 0 : CODING_FLAG_ISO_SHORT_FORM) | |
3682 | | (NILP (flags[5]) ? 0 : CODING_FLAG_ISO_RESET_AT_EOL) | |
3683 | | (NILP (flags[6]) ? 0 : CODING_FLAG_ISO_RESET_AT_CNTL) | |
3684 | | (NILP (flags[7]) ? 0 : CODING_FLAG_ISO_SEVEN_BITS) | |
3685 | | (NILP (flags[8]) ? 0 : CODING_FLAG_ISO_LOCKING_SHIFT) | |
3686 | | (NILP (flags[9]) ? 0 : CODING_FLAG_ISO_SINGLE_SHIFT) | |
3687 | | (NILP (flags[10]) ? 0 : CODING_FLAG_ISO_USE_ROMAN) | |
3688 | | (NILP (flags[11]) ? 0 : CODING_FLAG_ISO_USE_OLDJIS) | |
e0e989f6 KH |
3689 | | (NILP (flags[12]) ? 0 : CODING_FLAG_ISO_NO_DIRECTION) |
3690 | | (NILP (flags[13]) ? 0 : CODING_FLAG_ISO_INIT_AT_BOL) | |
c4825358 KH |
3691 | | (NILP (flags[14]) ? 0 : CODING_FLAG_ISO_DESIGNATE_AT_BOL) |
3692 | | (NILP (flags[15]) ? 0 : CODING_FLAG_ISO_SAFE) | |
3f003981 | 3693 | | (NILP (flags[16]) ? 0 : CODING_FLAG_ISO_LATIN_EXTRA) |
c4825358 | 3694 | ); |
4ed46869 KH |
3695 | |
3696 | /* Invoke graphic register 0 to plane 0. */ | |
3697 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; | |
3698 | /* Invoke graphic register 1 to plane 1 if we can use full 8-bit. */ | |
3699 | CODING_SPEC_ISO_INVOCATION (coding, 1) | |
3700 | = (coding->flags & CODING_FLAG_ISO_SEVEN_BITS ? -1 : 1); | |
3701 | /* Not single shifting at first. */ | |
6e85d753 | 3702 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; |
e0e989f6 | 3703 | /* Beginning of buffer should also be regarded as bol. */ |
6e85d753 | 3704 | CODING_SPEC_ISO_BOL (coding) = 1; |
4ed46869 | 3705 | |
70c22245 KH |
3706 | for (charset = 0; charset <= MAX_CHARSET; charset++) |
3707 | CODING_SPEC_ISO_REVISION_NUMBER (coding, charset) = 255; | |
3708 | val = Vcharset_revision_alist; | |
3709 | while (CONSP (val)) | |
3710 | { | |
03699b14 | 3711 | charset = get_charset_id (Fcar_safe (XCAR (val))); |
70c22245 | 3712 | if (charset >= 0 |
03699b14 | 3713 | && (temp = Fcdr_safe (XCAR (val)), INTEGERP (temp)) |
70c22245 KH |
3714 | && (i = XINT (temp), (i >= 0 && (i + '@') < 128))) |
3715 | CODING_SPEC_ISO_REVISION_NUMBER (coding, charset) = i; | |
03699b14 | 3716 | val = XCDR (val); |
70c22245 KH |
3717 | } |
3718 | ||
4ed46869 KH |
3719 | /* Checks FLAGS[REG] (REG = 0, 1, 2 3) and decide designations. |
3720 | FLAGS[REG] can be one of below: | |
3721 | integer CHARSET: CHARSET occupies register I, | |
3722 | t: designate nothing to REG initially, but can be used | |
3723 | by any charsets, | |
3724 | list of integer, nil, or t: designate the first | |
3725 | element (if integer) to REG initially, the remaining | |
3726 | elements (if integer) is designated to REG on request, | |
d46c5b12 | 3727 | if an element is t, REG can be used by any charsets, |
4ed46869 | 3728 | nil: REG is never used. */ |
467e7675 | 3729 | for (charset = 0; charset <= MAX_CHARSET; charset++) |
1ba9e4ab KH |
3730 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3731 | = CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION; | |
4ed46869 KH |
3732 | for (i = 0; i < 4; i++) |
3733 | { | |
87323294 PJ |
3734 | if ((INTEGERP (flags[i]) |
3735 | && (charset = XINT (flags[i]), CHARSET_VALID_P (charset))) | |
e0e989f6 | 3736 | || (charset = get_charset_id (flags[i])) >= 0) |
4ed46869 KH |
3737 | { |
3738 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = charset; | |
3739 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) = i; | |
3740 | } | |
3741 | else if (EQ (flags[i], Qt)) | |
3742 | { | |
3743 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
d46c5b12 KH |
3744 | reg_bits |= 1 << i; |
3745 | coding->flags |= CODING_FLAG_ISO_DESIGNATION; | |
4ed46869 KH |
3746 | } |
3747 | else if (CONSP (flags[i])) | |
3748 | { | |
84d60297 RS |
3749 | Lisp_Object tail; |
3750 | tail = flags[i]; | |
4ed46869 | 3751 | |
d46c5b12 | 3752 | coding->flags |= CODING_FLAG_ISO_DESIGNATION; |
87323294 PJ |
3753 | if ((INTEGERP (XCAR (tail)) |
3754 | && (charset = XINT (XCAR (tail)), | |
3755 | CHARSET_VALID_P (charset))) | |
03699b14 | 3756 | || (charset = get_charset_id (XCAR (tail))) >= 0) |
4ed46869 KH |
3757 | { |
3758 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = charset; | |
3759 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) =i; | |
3760 | } | |
3761 | else | |
3762 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
03699b14 | 3763 | tail = XCDR (tail); |
4ed46869 KH |
3764 | while (CONSP (tail)) |
3765 | { | |
87323294 PJ |
3766 | if ((INTEGERP (XCAR (tail)) |
3767 | && (charset = XINT (XCAR (tail)), | |
3768 | CHARSET_VALID_P (charset))) | |
03699b14 | 3769 | || (charset = get_charset_id (XCAR (tail))) >= 0) |
70c22245 KH |
3770 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3771 | = i; | |
03699b14 | 3772 | else if (EQ (XCAR (tail), Qt)) |
d46c5b12 | 3773 | reg_bits |= 1 << i; |
03699b14 | 3774 | tail = XCDR (tail); |
4ed46869 KH |
3775 | } |
3776 | } | |
3777 | else | |
3778 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
93dec019 | 3779 | |
4ed46869 KH |
3780 | CODING_SPEC_ISO_DESIGNATION (coding, i) |
3781 | = CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i); | |
3782 | } | |
3783 | ||
d46c5b12 | 3784 | if (reg_bits && ! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)) |
4ed46869 KH |
3785 | { |
3786 | /* REG 1 can be used only by locking shift in 7-bit env. */ | |
3787 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) | |
d46c5b12 | 3788 | reg_bits &= ~2; |
4ed46869 KH |
3789 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
3790 | /* Without any shifting, only REG 0 and 1 can be used. */ | |
d46c5b12 | 3791 | reg_bits &= 3; |
4ed46869 KH |
3792 | } |
3793 | ||
d46c5b12 KH |
3794 | if (reg_bits) |
3795 | for (charset = 0; charset <= MAX_CHARSET; charset++) | |
6e85d753 | 3796 | { |
928a85c1 | 3797 | if (CHARSET_DEFINED_P (charset) |
96148065 KH |
3798 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3799 | == CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION)) | |
d46c5b12 KH |
3800 | { |
3801 | /* There exist some default graphic registers to be | |
96148065 | 3802 | used by CHARSET. */ |
d46c5b12 KH |
3803 | |
3804 | /* We had better avoid designating a charset of | |
3805 | CHARS96 to REG 0 as far as possible. */ | |
3806 | if (CHARSET_CHARS (charset) == 96) | |
3807 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) | |
3808 | = (reg_bits & 2 | |
3809 | ? 1 : (reg_bits & 4 ? 2 : (reg_bits & 8 ? 3 : 0))); | |
3810 | else | |
3811 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) | |
3812 | = (reg_bits & 1 | |
3813 | ? 0 : (reg_bits & 2 ? 1 : (reg_bits & 4 ? 2 : 3))); | |
3814 | } | |
6e85d753 | 3815 | } |
4ed46869 | 3816 | } |
c952af22 | 3817 | coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK; |
d46c5b12 | 3818 | coding->spec.iso2022.last_invalid_designation_register = -1; |
4ed46869 KH |
3819 | break; |
3820 | ||
3821 | case 3: | |
3822 | coding->type = coding_type_big5; | |
c952af22 KH |
3823 | coding->common_flags |
3824 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3825 | coding->flags |
4608c386 | 3826 | = (NILP (XVECTOR (coding_spec)->contents[4]) |
4ed46869 KH |
3827 | ? CODING_FLAG_BIG5_HKU |
3828 | : CODING_FLAG_BIG5_ETEN); | |
3829 | break; | |
3830 | ||
3831 | case 4: | |
3832 | coding->type = coding_type_ccl; | |
c952af22 KH |
3833 | coding->common_flags |
3834 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3835 | { |
84d60297 | 3836 | val = XVECTOR (coding_spec)->contents[4]; |
ef4ced28 KH |
3837 | if (! CONSP (val) |
3838 | || setup_ccl_program (&(coding->spec.ccl.decoder), | |
03699b14 | 3839 | XCAR (val)) < 0 |
ef4ced28 | 3840 | || setup_ccl_program (&(coding->spec.ccl.encoder), |
03699b14 | 3841 | XCDR (val)) < 0) |
4ed46869 | 3842 | goto label_invalid_coding_system; |
1397dc18 KH |
3843 | |
3844 | bzero (coding->spec.ccl.valid_codes, 256); | |
3845 | val = Fplist_get (plist, Qvalid_codes); | |
3846 | if (CONSP (val)) | |
3847 | { | |
3848 | Lisp_Object this; | |
3849 | ||
03699b14 | 3850 | for (; CONSP (val); val = XCDR (val)) |
1397dc18 | 3851 | { |
03699b14 | 3852 | this = XCAR (val); |
1397dc18 KH |
3853 | if (INTEGERP (this) |
3854 | && XINT (this) >= 0 && XINT (this) < 256) | |
3855 | coding->spec.ccl.valid_codes[XINT (this)] = 1; | |
3856 | else if (CONSP (this) | |
03699b14 KR |
3857 | && INTEGERP (XCAR (this)) |
3858 | && INTEGERP (XCDR (this))) | |
1397dc18 | 3859 | { |
03699b14 KR |
3860 | int start = XINT (XCAR (this)); |
3861 | int end = XINT (XCDR (this)); | |
1397dc18 KH |
3862 | |
3863 | if (start >= 0 && start <= end && end < 256) | |
e133c8fa | 3864 | while (start <= end) |
1397dc18 KH |
3865 | coding->spec.ccl.valid_codes[start++] = 1; |
3866 | } | |
3867 | } | |
3868 | } | |
4ed46869 | 3869 | } |
c952af22 | 3870 | coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK; |
aaaf0b1e | 3871 | coding->spec.ccl.cr_carryover = 0; |
1c3478b0 | 3872 | coding->spec.ccl.eight_bit_carryover[0] = 0; |
4ed46869 KH |
3873 | break; |
3874 | ||
27901516 KH |
3875 | case 5: |
3876 | coding->type = coding_type_raw_text; | |
3877 | break; | |
3878 | ||
4ed46869 | 3879 | default: |
d46c5b12 | 3880 | goto label_invalid_coding_system; |
4ed46869 KH |
3881 | } |
3882 | return 0; | |
3883 | ||
3884 | label_invalid_coding_system: | |
3885 | coding->type = coding_type_no_conversion; | |
d46c5b12 | 3886 | coding->category_idx = CODING_CATEGORY_IDX_BINARY; |
c952af22 | 3887 | coding->common_flags = 0; |
dec137e5 | 3888 | coding->eol_type = CODING_EOL_LF; |
d46c5b12 | 3889 | coding->pre_write_conversion = coding->post_read_conversion = Qnil; |
4ed46869 KH |
3890 | return -1; |
3891 | } | |
3892 | ||
ec6d2bb8 KH |
3893 | /* Free memory blocks allocated for storing composition information. */ |
3894 | ||
3895 | void | |
3896 | coding_free_composition_data (coding) | |
3897 | struct coding_system *coding; | |
3898 | { | |
3899 | struct composition_data *cmp_data = coding->cmp_data, *next; | |
3900 | ||
3901 | if (!cmp_data) | |
3902 | return; | |
3903 | /* Memory blocks are chained. At first, rewind to the first, then, | |
3904 | free blocks one by one. */ | |
3905 | while (cmp_data->prev) | |
3906 | cmp_data = cmp_data->prev; | |
3907 | while (cmp_data) | |
3908 | { | |
3909 | next = cmp_data->next; | |
3910 | xfree (cmp_data); | |
3911 | cmp_data = next; | |
3912 | } | |
3913 | coding->cmp_data = NULL; | |
3914 | } | |
3915 | ||
3916 | /* Set `char_offset' member of all memory blocks pointed by | |
3917 | coding->cmp_data to POS. */ | |
3918 | ||
3919 | void | |
3920 | coding_adjust_composition_offset (coding, pos) | |
3921 | struct coding_system *coding; | |
3922 | int pos; | |
3923 | { | |
3924 | struct composition_data *cmp_data; | |
3925 | ||
3926 | for (cmp_data = coding->cmp_data; cmp_data; cmp_data = cmp_data->next) | |
3927 | cmp_data->char_offset = pos; | |
3928 | } | |
3929 | ||
54f78171 KH |
3930 | /* Setup raw-text or one of its subsidiaries in the structure |
3931 | coding_system CODING according to the already setup value eol_type | |
3932 | in CODING. CODING should be setup for some coding system in | |
3933 | advance. */ | |
3934 | ||
3935 | void | |
3936 | setup_raw_text_coding_system (coding) | |
3937 | struct coding_system *coding; | |
3938 | { | |
3939 | if (coding->type != coding_type_raw_text) | |
3940 | { | |
3941 | coding->symbol = Qraw_text; | |
3942 | coding->type = coding_type_raw_text; | |
3943 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
3944 | { | |
84d60297 RS |
3945 | Lisp_Object subsidiaries; |
3946 | subsidiaries = Fget (Qraw_text, Qeol_type); | |
54f78171 KH |
3947 | |
3948 | if (VECTORP (subsidiaries) | |
3949 | && XVECTOR (subsidiaries)->size == 3) | |
3950 | coding->symbol | |
3951 | = XVECTOR (subsidiaries)->contents[coding->eol_type]; | |
3952 | } | |
716e0b0a | 3953 | setup_coding_system (coding->symbol, coding); |
54f78171 KH |
3954 | } |
3955 | return; | |
3956 | } | |
3957 | ||
4ed46869 KH |
3958 | /* Emacs has a mechanism to automatically detect a coding system if it |
3959 | is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But, | |
3960 | it's impossible to distinguish some coding systems accurately | |
3961 | because they use the same range of codes. So, at first, coding | |
3962 | systems are categorized into 7, those are: | |
3963 | ||
0ef69138 | 3964 | o coding-category-emacs-mule |
4ed46869 KH |
3965 | |
3966 | The category for a coding system which has the same code range | |
3967 | as Emacs' internal format. Assigned the coding-system (Lisp | |
0ef69138 | 3968 | symbol) `emacs-mule' by default. |
4ed46869 KH |
3969 | |
3970 | o coding-category-sjis | |
3971 | ||
3972 | The category for a coding system which has the same code range | |
3973 | as SJIS. Assigned the coding-system (Lisp | |
7717c392 | 3974 | symbol) `japanese-shift-jis' by default. |
4ed46869 KH |
3975 | |
3976 | o coding-category-iso-7 | |
3977 | ||
3978 | The category for a coding system which has the same code range | |
7717c392 | 3979 | as ISO2022 of 7-bit environment. This doesn't use any locking |
d46c5b12 KH |
3980 | shift and single shift functions. This can encode/decode all |
3981 | charsets. Assigned the coding-system (Lisp symbol) | |
3982 | `iso-2022-7bit' by default. | |
3983 | ||
3984 | o coding-category-iso-7-tight | |
3985 | ||
3986 | Same as coding-category-iso-7 except that this can | |
3987 | encode/decode only the specified charsets. | |
4ed46869 KH |
3988 | |
3989 | o coding-category-iso-8-1 | |
3990 | ||
3991 | The category for a coding system which has the same code range | |
3992 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
3993 | for DIMENSION1 charset. This doesn't use any locking shift |
3994 | and single shift functions. Assigned the coding-system (Lisp | |
3995 | symbol) `iso-latin-1' by default. | |
4ed46869 KH |
3996 | |
3997 | o coding-category-iso-8-2 | |
3998 | ||
3999 | The category for a coding system which has the same code range | |
4000 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
4001 | for DIMENSION2 charset. This doesn't use any locking shift |
4002 | and single shift functions. Assigned the coding-system (Lisp | |
4003 | symbol) `japanese-iso-8bit' by default. | |
4ed46869 | 4004 | |
7717c392 | 4005 | o coding-category-iso-7-else |
4ed46869 KH |
4006 | |
4007 | The category for a coding system which has the same code range | |
8ca3766a | 4008 | as ISO2022 of 7-bit environment but uses locking shift or |
7717c392 KH |
4009 | single shift functions. Assigned the coding-system (Lisp |
4010 | symbol) `iso-2022-7bit-lock' by default. | |
4011 | ||
4012 | o coding-category-iso-8-else | |
4013 | ||
4014 | The category for a coding system which has the same code range | |
8ca3766a | 4015 | as ISO2022 of 8-bit environment but uses locking shift or |
7717c392 KH |
4016 | single shift functions. Assigned the coding-system (Lisp |
4017 | symbol) `iso-2022-8bit-ss2' by default. | |
4ed46869 KH |
4018 | |
4019 | o coding-category-big5 | |
4020 | ||
4021 | The category for a coding system which has the same code range | |
4022 | as BIG5. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 4023 | `cn-big5' by default. |
4ed46869 | 4024 | |
fa42c37f KH |
4025 | o coding-category-utf-8 |
4026 | ||
4027 | The category for a coding system which has the same code range | |
4028 | as UTF-8 (cf. RFC2279). Assigned the coding-system (Lisp | |
4029 | symbol) `utf-8' by default. | |
4030 | ||
4031 | o coding-category-utf-16-be | |
4032 | ||
4033 | The category for a coding system in which a text has an | |
4034 | Unicode signature (cf. Unicode Standard) in the order of BIG | |
4035 | endian at the head. Assigned the coding-system (Lisp symbol) | |
4036 | `utf-16-be' by default. | |
4037 | ||
4038 | o coding-category-utf-16-le | |
4039 | ||
4040 | The category for a coding system in which a text has an | |
4041 | Unicode signature (cf. Unicode Standard) in the order of | |
4042 | LITTLE endian at the head. Assigned the coding-system (Lisp | |
4043 | symbol) `utf-16-le' by default. | |
4044 | ||
1397dc18 KH |
4045 | o coding-category-ccl |
4046 | ||
4047 | The category for a coding system of which encoder/decoder is | |
4048 | written in CCL programs. The default value is nil, i.e., no | |
4049 | coding system is assigned. | |
4050 | ||
4ed46869 KH |
4051 | o coding-category-binary |
4052 | ||
4053 | The category for a coding system not categorized in any of the | |
4054 | above. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 4055 | `no-conversion' by default. |
4ed46869 KH |
4056 | |
4057 | Each of them is a Lisp symbol and the value is an actual | |
cfb43547 | 4058 | `coding-system' (this is also a Lisp symbol) assigned by a user. |
4ed46869 KH |
4059 | What Emacs does actually is to detect a category of coding system. |
4060 | Then, it uses a `coding-system' assigned to it. If Emacs can't | |
cfb43547 | 4061 | decide a single possible category, it selects a category of the |
4ed46869 KH |
4062 | highest priority. Priorities of categories are also specified by a |
4063 | user in a Lisp variable `coding-category-list'. | |
4064 | ||
4065 | */ | |
4066 | ||
66cfb530 KH |
4067 | static |
4068 | int ascii_skip_code[256]; | |
4069 | ||
d46c5b12 | 4070 | /* Detect how a text of length SRC_BYTES pointed by SOURCE is encoded. |
4ed46869 KH |
4071 | If it detects possible coding systems, return an integer in which |
4072 | appropriate flag bits are set. Flag bits are defined by macros | |
fa42c37f KH |
4073 | CODING_CATEGORY_MASK_XXX in `coding.h'. If PRIORITIES is non-NULL, |
4074 | it should point the table `coding_priorities'. In that case, only | |
4075 | the flag bit for a coding system of the highest priority is set in | |
0a28aafb KH |
4076 | the returned value. If MULTIBYTEP is nonzero, 8-bit codes of the |
4077 | range 0x80..0x9F are in multibyte form. | |
4ed46869 | 4078 | |
d46c5b12 KH |
4079 | How many ASCII characters are at the head is returned as *SKIP. */ |
4080 | ||
4081 | static int | |
0a28aafb | 4082 | detect_coding_mask (source, src_bytes, priorities, skip, multibytep) |
d46c5b12 KH |
4083 | unsigned char *source; |
4084 | int src_bytes, *priorities, *skip; | |
0a28aafb | 4085 | int multibytep; |
4ed46869 KH |
4086 | { |
4087 | register unsigned char c; | |
d46c5b12 | 4088 | unsigned char *src = source, *src_end = source + src_bytes; |
fa42c37f | 4089 | unsigned int mask, utf16_examined_p, iso2022_examined_p; |
da55a2b7 | 4090 | int i; |
4ed46869 KH |
4091 | |
4092 | /* At first, skip all ASCII characters and control characters except | |
4093 | for three ISO2022 specific control characters. */ | |
66cfb530 KH |
4094 | ascii_skip_code[ISO_CODE_SO] = 0; |
4095 | ascii_skip_code[ISO_CODE_SI] = 0; | |
4096 | ascii_skip_code[ISO_CODE_ESC] = 0; | |
4097 | ||
bcf26d6a | 4098 | label_loop_detect_coding: |
66cfb530 | 4099 | while (src < src_end && ascii_skip_code[*src]) src++; |
d46c5b12 | 4100 | *skip = src - source; |
4ed46869 KH |
4101 | |
4102 | if (src >= src_end) | |
4103 | /* We found nothing other than ASCII. There's nothing to do. */ | |
d46c5b12 | 4104 | return 0; |
4ed46869 | 4105 | |
8a8147d6 | 4106 | c = *src; |
4ed46869 KH |
4107 | /* The text seems to be encoded in some multilingual coding system. |
4108 | Now, try to find in which coding system the text is encoded. */ | |
4109 | if (c < 0x80) | |
bcf26d6a KH |
4110 | { |
4111 | /* i.e. (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) */ | |
4112 | /* C is an ISO2022 specific control code of C0. */ | |
0a28aafb | 4113 | mask = detect_coding_iso2022 (src, src_end, multibytep); |
1b2af4b0 | 4114 | if (mask == 0) |
d46c5b12 KH |
4115 | { |
4116 | /* No valid ISO2022 code follows C. Try again. */ | |
4117 | src++; | |
66cfb530 KH |
4118 | if (c == ISO_CODE_ESC) |
4119 | ascii_skip_code[ISO_CODE_ESC] = 1; | |
4120 | else | |
4121 | ascii_skip_code[ISO_CODE_SO] = ascii_skip_code[ISO_CODE_SI] = 1; | |
d46c5b12 KH |
4122 | goto label_loop_detect_coding; |
4123 | } | |
4124 | if (priorities) | |
fa42c37f KH |
4125 | { |
4126 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
4127 | { | |
4128 | if (mask & priorities[i]) | |
4129 | return priorities[i]; | |
4130 | } | |
4131 | return CODING_CATEGORY_MASK_RAW_TEXT; | |
4132 | } | |
bcf26d6a | 4133 | } |
d46c5b12 | 4134 | else |
c4825358 | 4135 | { |
d46c5b12 | 4136 | int try; |
4ed46869 | 4137 | |
0a28aafb | 4138 | if (multibytep && c == LEADING_CODE_8_BIT_CONTROL) |
67091e59 | 4139 | c = src[1] - 0x20; |
0a28aafb | 4140 | |
d46c5b12 KH |
4141 | if (c < 0xA0) |
4142 | { | |
4143 | /* C is the first byte of SJIS character code, | |
fa42c37f KH |
4144 | or a leading-code of Emacs' internal format (emacs-mule), |
4145 | or the first byte of UTF-16. */ | |
4146 | try = (CODING_CATEGORY_MASK_SJIS | |
4147 | | CODING_CATEGORY_MASK_EMACS_MULE | |
4148 | | CODING_CATEGORY_MASK_UTF_16_BE | |
4149 | | CODING_CATEGORY_MASK_UTF_16_LE); | |
d46c5b12 KH |
4150 | |
4151 | /* Or, if C is a special latin extra code, | |
93dec019 | 4152 | or is an ISO2022 specific control code of C1 (SS2 or SS3), |
d46c5b12 KH |
4153 | or is an ISO2022 control-sequence-introducer (CSI), |
4154 | we should also consider the possibility of ISO2022 codings. */ | |
4155 | if ((VECTORP (Vlatin_extra_code_table) | |
4156 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
4157 | || (c == ISO_CODE_SS2 || c == ISO_CODE_SS3) | |
4158 | || (c == ISO_CODE_CSI | |
4159 | && (src < src_end | |
4160 | && (*src == ']' | |
4161 | || ((*src == '0' || *src == '1' || *src == '2') | |
4162 | && src + 1 < src_end | |
4163 | && src[1] == ']'))))) | |
4164 | try |= (CODING_CATEGORY_MASK_ISO_8_ELSE | |
4165 | | CODING_CATEGORY_MASK_ISO_8BIT); | |
4166 | } | |
c4825358 | 4167 | else |
d46c5b12 KH |
4168 | /* C is a character of ISO2022 in graphic plane right, |
4169 | or a SJIS's 1-byte character code (i.e. JISX0201), | |
fa42c37f KH |
4170 | or the first byte of BIG5's 2-byte code, |
4171 | or the first byte of UTF-8/16. */ | |
d46c5b12 KH |
4172 | try = (CODING_CATEGORY_MASK_ISO_8_ELSE |
4173 | | CODING_CATEGORY_MASK_ISO_8BIT | |
4174 | | CODING_CATEGORY_MASK_SJIS | |
fa42c37f KH |
4175 | | CODING_CATEGORY_MASK_BIG5 |
4176 | | CODING_CATEGORY_MASK_UTF_8 | |
4177 | | CODING_CATEGORY_MASK_UTF_16_BE | |
4178 | | CODING_CATEGORY_MASK_UTF_16_LE); | |
d46c5b12 | 4179 | |
1397dc18 KH |
4180 | /* Or, we may have to consider the possibility of CCL. */ |
4181 | if (coding_system_table[CODING_CATEGORY_IDX_CCL] | |
4182 | && (coding_system_table[CODING_CATEGORY_IDX_CCL] | |
4183 | ->spec.ccl.valid_codes)[c]) | |
4184 | try |= CODING_CATEGORY_MASK_CCL; | |
4185 | ||
d46c5b12 | 4186 | mask = 0; |
fa42c37f | 4187 | utf16_examined_p = iso2022_examined_p = 0; |
d46c5b12 KH |
4188 | if (priorities) |
4189 | { | |
4190 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
4191 | { | |
fa42c37f KH |
4192 | if (!iso2022_examined_p |
4193 | && (priorities[i] & try & CODING_CATEGORY_MASK_ISO)) | |
4194 | { | |
0192762c | 4195 | mask |= detect_coding_iso2022 (src, src_end, multibytep); |
fa42c37f KH |
4196 | iso2022_examined_p = 1; |
4197 | } | |
5ab13dd0 | 4198 | else if (priorities[i] & try & CODING_CATEGORY_MASK_SJIS) |
0a28aafb | 4199 | mask |= detect_coding_sjis (src, src_end, multibytep); |
fa42c37f | 4200 | else if (priorities[i] & try & CODING_CATEGORY_MASK_UTF_8) |
0a28aafb | 4201 | mask |= detect_coding_utf_8 (src, src_end, multibytep); |
fa42c37f KH |
4202 | else if (!utf16_examined_p |
4203 | && (priorities[i] & try & | |
4204 | CODING_CATEGORY_MASK_UTF_16_BE_LE)) | |
4205 | { | |
0a28aafb | 4206 | mask |= detect_coding_utf_16 (src, src_end, multibytep); |
fa42c37f KH |
4207 | utf16_examined_p = 1; |
4208 | } | |
5ab13dd0 | 4209 | else if (priorities[i] & try & CODING_CATEGORY_MASK_BIG5) |
0a28aafb | 4210 | mask |= detect_coding_big5 (src, src_end, multibytep); |
5ab13dd0 | 4211 | else if (priorities[i] & try & CODING_CATEGORY_MASK_EMACS_MULE) |
0a28aafb | 4212 | mask |= detect_coding_emacs_mule (src, src_end, multibytep); |
89fa8b36 | 4213 | else if (priorities[i] & try & CODING_CATEGORY_MASK_CCL) |
0a28aafb | 4214 | mask |= detect_coding_ccl (src, src_end, multibytep); |
5ab13dd0 | 4215 | else if (priorities[i] & CODING_CATEGORY_MASK_RAW_TEXT) |
fa42c37f | 4216 | mask |= CODING_CATEGORY_MASK_RAW_TEXT; |
5ab13dd0 | 4217 | else if (priorities[i] & CODING_CATEGORY_MASK_BINARY) |
fa42c37f KH |
4218 | mask |= CODING_CATEGORY_MASK_BINARY; |
4219 | if (mask & priorities[i]) | |
4220 | return priorities[i]; | |
d46c5b12 KH |
4221 | } |
4222 | return CODING_CATEGORY_MASK_RAW_TEXT; | |
4223 | } | |
4224 | if (try & CODING_CATEGORY_MASK_ISO) | |
0a28aafb | 4225 | mask |= detect_coding_iso2022 (src, src_end, multibytep); |
d46c5b12 | 4226 | if (try & CODING_CATEGORY_MASK_SJIS) |
0a28aafb | 4227 | mask |= detect_coding_sjis (src, src_end, multibytep); |
d46c5b12 | 4228 | if (try & CODING_CATEGORY_MASK_BIG5) |
0a28aafb | 4229 | mask |= detect_coding_big5 (src, src_end, multibytep); |
fa42c37f | 4230 | if (try & CODING_CATEGORY_MASK_UTF_8) |
0a28aafb | 4231 | mask |= detect_coding_utf_8 (src, src_end, multibytep); |
fa42c37f | 4232 | if (try & CODING_CATEGORY_MASK_UTF_16_BE_LE) |
0a28aafb | 4233 | mask |= detect_coding_utf_16 (src, src_end, multibytep); |
d46c5b12 | 4234 | if (try & CODING_CATEGORY_MASK_EMACS_MULE) |
0a28aafb | 4235 | mask |= detect_coding_emacs_mule (src, src_end, multibytep); |
1397dc18 | 4236 | if (try & CODING_CATEGORY_MASK_CCL) |
0a28aafb | 4237 | mask |= detect_coding_ccl (src, src_end, multibytep); |
c4825358 | 4238 | } |
5ab13dd0 | 4239 | return (mask | CODING_CATEGORY_MASK_RAW_TEXT | CODING_CATEGORY_MASK_BINARY); |
4ed46869 KH |
4240 | } |
4241 | ||
4242 | /* Detect how a text of length SRC_BYTES pointed by SRC is encoded. | |
4243 | The information of the detected coding system is set in CODING. */ | |
4244 | ||
4245 | void | |
4246 | detect_coding (coding, src, src_bytes) | |
4247 | struct coding_system *coding; | |
a4244313 | 4248 | const unsigned char *src; |
4ed46869 KH |
4249 | int src_bytes; |
4250 | { | |
d46c5b12 | 4251 | unsigned int idx; |
da55a2b7 | 4252 | int skip, mask; |
84d60297 | 4253 | Lisp_Object val; |
4ed46869 | 4254 | |
84d60297 | 4255 | val = Vcoding_category_list; |
64c1e55f KH |
4256 | mask = detect_coding_mask (src, src_bytes, coding_priorities, &skip, |
4257 | coding->src_multibyte); | |
d46c5b12 | 4258 | coding->heading_ascii = skip; |
4ed46869 | 4259 | |
d46c5b12 KH |
4260 | if (!mask) return; |
4261 | ||
4262 | /* We found a single coding system of the highest priority in MASK. */ | |
4263 | idx = 0; | |
4264 | while (mask && ! (mask & 1)) mask >>= 1, idx++; | |
4265 | if (! mask) | |
4266 | idx = CODING_CATEGORY_IDX_RAW_TEXT; | |
4ed46869 | 4267 | |
f5c1dd0d | 4268 | val = SYMBOL_VALUE (XVECTOR (Vcoding_category_table)->contents[idx]); |
d46c5b12 KH |
4269 | |
4270 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
27901516 | 4271 | { |
84d60297 | 4272 | Lisp_Object tmp; |
d46c5b12 | 4273 | |
84d60297 | 4274 | tmp = Fget (val, Qeol_type); |
d46c5b12 KH |
4275 | if (VECTORP (tmp)) |
4276 | val = XVECTOR (tmp)->contents[coding->eol_type]; | |
4ed46869 | 4277 | } |
b73bfc1c KH |
4278 | |
4279 | /* Setup this new coding system while preserving some slots. */ | |
4280 | { | |
4281 | int src_multibyte = coding->src_multibyte; | |
4282 | int dst_multibyte = coding->dst_multibyte; | |
4283 | ||
4284 | setup_coding_system (val, coding); | |
4285 | coding->src_multibyte = src_multibyte; | |
4286 | coding->dst_multibyte = dst_multibyte; | |
4287 | coding->heading_ascii = skip; | |
4288 | } | |
4ed46869 KH |
4289 | } |
4290 | ||
d46c5b12 KH |
4291 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by |
4292 | SOURCE is encoded. Return one of CODING_EOL_LF, CODING_EOL_CRLF, | |
4293 | CODING_EOL_CR, and CODING_EOL_UNDECIDED. | |
4294 | ||
4295 | How many non-eol characters are at the head is returned as *SKIP. */ | |
4ed46869 | 4296 | |
bc4bc72a RS |
4297 | #define MAX_EOL_CHECK_COUNT 3 |
4298 | ||
d46c5b12 KH |
4299 | static int |
4300 | detect_eol_type (source, src_bytes, skip) | |
4301 | unsigned char *source; | |
4302 | int src_bytes, *skip; | |
4ed46869 | 4303 | { |
d46c5b12 | 4304 | unsigned char *src = source, *src_end = src + src_bytes; |
4ed46869 | 4305 | unsigned char c; |
bc4bc72a RS |
4306 | int total = 0; /* How many end-of-lines are found so far. */ |
4307 | int eol_type = CODING_EOL_UNDECIDED; | |
4308 | int this_eol_type; | |
4ed46869 | 4309 | |
d46c5b12 KH |
4310 | *skip = 0; |
4311 | ||
bc4bc72a | 4312 | while (src < src_end && total < MAX_EOL_CHECK_COUNT) |
4ed46869 KH |
4313 | { |
4314 | c = *src++; | |
bc4bc72a | 4315 | if (c == '\n' || c == '\r') |
4ed46869 | 4316 | { |
d46c5b12 KH |
4317 | if (*skip == 0) |
4318 | *skip = src - 1 - source; | |
bc4bc72a RS |
4319 | total++; |
4320 | if (c == '\n') | |
4321 | this_eol_type = CODING_EOL_LF; | |
4322 | else if (src >= src_end || *src != '\n') | |
4323 | this_eol_type = CODING_EOL_CR; | |
4ed46869 | 4324 | else |
bc4bc72a RS |
4325 | this_eol_type = CODING_EOL_CRLF, src++; |
4326 | ||
4327 | if (eol_type == CODING_EOL_UNDECIDED) | |
4328 | /* This is the first end-of-line. */ | |
4329 | eol_type = this_eol_type; | |
4330 | else if (eol_type != this_eol_type) | |
d46c5b12 KH |
4331 | { |
4332 | /* The found type is different from what found before. */ | |
4333 | eol_type = CODING_EOL_INCONSISTENT; | |
4334 | break; | |
4335 | } | |
4ed46869 KH |
4336 | } |
4337 | } | |
bc4bc72a | 4338 | |
d46c5b12 KH |
4339 | if (*skip == 0) |
4340 | *skip = src_end - source; | |
85a02ca4 | 4341 | return eol_type; |
4ed46869 KH |
4342 | } |
4343 | ||
fa42c37f KH |
4344 | /* Like detect_eol_type, but detect EOL type in 2-octet |
4345 | big-endian/little-endian format for coding systems utf-16-be and | |
4346 | utf-16-le. */ | |
4347 | ||
4348 | static int | |
4349 | detect_eol_type_in_2_octet_form (source, src_bytes, skip, big_endian_p) | |
4350 | unsigned char *source; | |
cfb43547 | 4351 | int src_bytes, *skip, big_endian_p; |
fa42c37f KH |
4352 | { |
4353 | unsigned char *src = source, *src_end = src + src_bytes; | |
4354 | unsigned int c1, c2; | |
4355 | int total = 0; /* How many end-of-lines are found so far. */ | |
4356 | int eol_type = CODING_EOL_UNDECIDED; | |
4357 | int this_eol_type; | |
4358 | int msb, lsb; | |
4359 | ||
4360 | if (big_endian_p) | |
4361 | msb = 0, lsb = 1; | |
4362 | else | |
4363 | msb = 1, lsb = 0; | |
4364 | ||
4365 | *skip = 0; | |
4366 | ||
4367 | while ((src + 1) < src_end && total < MAX_EOL_CHECK_COUNT) | |
4368 | { | |
4369 | c1 = (src[msb] << 8) | (src[lsb]); | |
4370 | src += 2; | |
4371 | ||
4372 | if (c1 == '\n' || c1 == '\r') | |
4373 | { | |
4374 | if (*skip == 0) | |
4375 | *skip = src - 2 - source; | |
4376 | total++; | |
4377 | if (c1 == '\n') | |
4378 | { | |
4379 | this_eol_type = CODING_EOL_LF; | |
4380 | } | |
4381 | else | |
4382 | { | |
4383 | if ((src + 1) >= src_end) | |
4384 | { | |
4385 | this_eol_type = CODING_EOL_CR; | |
4386 | } | |
4387 | else | |
4388 | { | |
4389 | c2 = (src[msb] << 8) | (src[lsb]); | |
4390 | if (c2 == '\n') | |
4391 | this_eol_type = CODING_EOL_CRLF, src += 2; | |
4392 | else | |
4393 | this_eol_type = CODING_EOL_CR; | |
4394 | } | |
4395 | } | |
4396 | ||
4397 | if (eol_type == CODING_EOL_UNDECIDED) | |
4398 | /* This is the first end-of-line. */ | |
4399 | eol_type = this_eol_type; | |
4400 | else if (eol_type != this_eol_type) | |
4401 | { | |
4402 | /* The found type is different from what found before. */ | |
4403 | eol_type = CODING_EOL_INCONSISTENT; | |
4404 | break; | |
4405 | } | |
4406 | } | |
4407 | } | |
4408 | ||
4409 | if (*skip == 0) | |
4410 | *skip = src_end - source; | |
4411 | return eol_type; | |
4412 | } | |
4413 | ||
4ed46869 KH |
4414 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by SRC |
4415 | is encoded. If it detects an appropriate format of end-of-line, it | |
4416 | sets the information in *CODING. */ | |
4417 | ||
4418 | void | |
4419 | detect_eol (coding, src, src_bytes) | |
4420 | struct coding_system *coding; | |
a4244313 | 4421 | const unsigned char *src; |
4ed46869 KH |
4422 | int src_bytes; |
4423 | { | |
4608c386 | 4424 | Lisp_Object val; |
d46c5b12 | 4425 | int skip; |
fa42c37f KH |
4426 | int eol_type; |
4427 | ||
4428 | switch (coding->category_idx) | |
4429 | { | |
4430 | case CODING_CATEGORY_IDX_UTF_16_BE: | |
4431 | eol_type = detect_eol_type_in_2_octet_form (src, src_bytes, &skip, 1); | |
4432 | break; | |
4433 | case CODING_CATEGORY_IDX_UTF_16_LE: | |
4434 | eol_type = detect_eol_type_in_2_octet_form (src, src_bytes, &skip, 0); | |
4435 | break; | |
4436 | default: | |
4437 | eol_type = detect_eol_type (src, src_bytes, &skip); | |
4438 | break; | |
4439 | } | |
d46c5b12 KH |
4440 | |
4441 | if (coding->heading_ascii > skip) | |
4442 | coding->heading_ascii = skip; | |
4443 | else | |
4444 | skip = coding->heading_ascii; | |
4ed46869 | 4445 | |
0ef69138 | 4446 | if (eol_type == CODING_EOL_UNDECIDED) |
4ed46869 | 4447 | return; |
27901516 KH |
4448 | if (eol_type == CODING_EOL_INCONSISTENT) |
4449 | { | |
4450 | #if 0 | |
4451 | /* This code is suppressed until we find a better way to | |
992f23f2 | 4452 | distinguish raw text file and binary file. */ |
27901516 KH |
4453 | |
4454 | /* If we have already detected that the coding is raw-text, the | |
4455 | coding should actually be no-conversion. */ | |
4456 | if (coding->type == coding_type_raw_text) | |
4457 | { | |
4458 | setup_coding_system (Qno_conversion, coding); | |
4459 | return; | |
4460 | } | |
4461 | /* Else, let's decode only text code anyway. */ | |
4462 | #endif /* 0 */ | |
1b2af4b0 | 4463 | eol_type = CODING_EOL_LF; |
27901516 KH |
4464 | } |
4465 | ||
4608c386 | 4466 | val = Fget (coding->symbol, Qeol_type); |
4ed46869 | 4467 | if (VECTORP (val) && XVECTOR (val)->size == 3) |
d46c5b12 | 4468 | { |
b73bfc1c KH |
4469 | int src_multibyte = coding->src_multibyte; |
4470 | int dst_multibyte = coding->dst_multibyte; | |
1cd6b64c | 4471 | struct composition_data *cmp_data = coding->cmp_data; |
b73bfc1c | 4472 | |
d46c5b12 | 4473 | setup_coding_system (XVECTOR (val)->contents[eol_type], coding); |
b73bfc1c KH |
4474 | coding->src_multibyte = src_multibyte; |
4475 | coding->dst_multibyte = dst_multibyte; | |
d46c5b12 | 4476 | coding->heading_ascii = skip; |
1cd6b64c | 4477 | coding->cmp_data = cmp_data; |
d46c5b12 KH |
4478 | } |
4479 | } | |
4480 | ||
4481 | #define CONVERSION_BUFFER_EXTRA_ROOM 256 | |
4482 | ||
b73bfc1c KH |
4483 | #define DECODING_BUFFER_MAG(coding) \ |
4484 | (coding->type == coding_type_iso2022 \ | |
4485 | ? 3 \ | |
4486 | : (coding->type == coding_type_ccl \ | |
4487 | ? coding->spec.ccl.decoder.buf_magnification \ | |
4488 | : 2)) | |
d46c5b12 KH |
4489 | |
4490 | /* Return maximum size (bytes) of a buffer enough for decoding | |
4491 | SRC_BYTES of text encoded in CODING. */ | |
4492 | ||
4493 | int | |
4494 | decoding_buffer_size (coding, src_bytes) | |
4495 | struct coding_system *coding; | |
4496 | int src_bytes; | |
4497 | { | |
4498 | return (src_bytes * DECODING_BUFFER_MAG (coding) | |
4499 | + CONVERSION_BUFFER_EXTRA_ROOM); | |
4500 | } | |
4501 | ||
4502 | /* Return maximum size (bytes) of a buffer enough for encoding | |
4503 | SRC_BYTES of text to CODING. */ | |
4504 | ||
4505 | int | |
4506 | encoding_buffer_size (coding, src_bytes) | |
4507 | struct coding_system *coding; | |
4508 | int src_bytes; | |
4509 | { | |
4510 | int magnification; | |
4511 | ||
4512 | if (coding->type == coding_type_ccl) | |
a84f1519 KH |
4513 | { |
4514 | magnification = coding->spec.ccl.encoder.buf_magnification; | |
4515 | if (coding->eol_type == CODING_EOL_CRLF) | |
4516 | magnification *= 2; | |
4517 | } | |
b73bfc1c | 4518 | else if (CODING_REQUIRE_ENCODING (coding)) |
d46c5b12 | 4519 | magnification = 3; |
b73bfc1c KH |
4520 | else |
4521 | magnification = 1; | |
d46c5b12 KH |
4522 | |
4523 | return (src_bytes * magnification + CONVERSION_BUFFER_EXTRA_ROOM); | |
4524 | } | |
4525 | ||
73be902c KH |
4526 | /* Working buffer for code conversion. */ |
4527 | struct conversion_buffer | |
4528 | { | |
4529 | int size; /* size of data. */ | |
4530 | int on_stack; /* 1 if allocated by alloca. */ | |
4531 | unsigned char *data; | |
4532 | }; | |
d46c5b12 | 4533 | |
73be902c KH |
4534 | /* Don't use alloca for allocating memory space larger than this, lest |
4535 | we overflow their stack. */ | |
4536 | #define MAX_ALLOCA 16*1024 | |
d46c5b12 | 4537 | |
73be902c KH |
4538 | /* Allocate LEN bytes of memory for BUF (struct conversion_buffer). */ |
4539 | #define allocate_conversion_buffer(buf, len) \ | |
4540 | do { \ | |
4541 | if (len < MAX_ALLOCA) \ | |
4542 | { \ | |
4543 | buf.data = (unsigned char *) alloca (len); \ | |
4544 | buf.on_stack = 1; \ | |
4545 | } \ | |
4546 | else \ | |
4547 | { \ | |
4548 | buf.data = (unsigned char *) xmalloc (len); \ | |
4549 | buf.on_stack = 0; \ | |
4550 | } \ | |
4551 | buf.size = len; \ | |
4552 | } while (0) | |
d46c5b12 | 4553 | |
73be902c KH |
4554 | /* Double the allocated memory for *BUF. */ |
4555 | static void | |
4556 | extend_conversion_buffer (buf) | |
4557 | struct conversion_buffer *buf; | |
d46c5b12 | 4558 | { |
73be902c | 4559 | if (buf->on_stack) |
d46c5b12 | 4560 | { |
73be902c KH |
4561 | unsigned char *save = buf->data; |
4562 | buf->data = (unsigned char *) xmalloc (buf->size * 2); | |
4563 | bcopy (save, buf->data, buf->size); | |
4564 | buf->on_stack = 0; | |
d46c5b12 | 4565 | } |
73be902c KH |
4566 | else |
4567 | { | |
4568 | buf->data = (unsigned char *) xrealloc (buf->data, buf->size * 2); | |
4569 | } | |
4570 | buf->size *= 2; | |
4571 | } | |
4572 | ||
4573 | /* Free the allocated memory for BUF if it is not on stack. */ | |
4574 | static void | |
4575 | free_conversion_buffer (buf) | |
4576 | struct conversion_buffer *buf; | |
4577 | { | |
4578 | if (!buf->on_stack) | |
4579 | xfree (buf->data); | |
d46c5b12 KH |
4580 | } |
4581 | ||
4582 | int | |
4583 | ccl_coding_driver (coding, source, destination, src_bytes, dst_bytes, encodep) | |
4584 | struct coding_system *coding; | |
4585 | unsigned char *source, *destination; | |
4586 | int src_bytes, dst_bytes, encodep; | |
4587 | { | |
4588 | struct ccl_program *ccl | |
4589 | = encodep ? &coding->spec.ccl.encoder : &coding->spec.ccl.decoder; | |
1c3478b0 | 4590 | unsigned char *dst = destination; |
d46c5b12 | 4591 | |
bd64290d | 4592 | ccl->suppress_error = coding->suppress_error; |
ae9ff118 | 4593 | ccl->last_block = coding->mode & CODING_MODE_LAST_BLOCK; |
aaaf0b1e | 4594 | if (encodep) |
80e0ca99 KH |
4595 | { |
4596 | /* On encoding, EOL format is converted within ccl_driver. For | |
4597 | that, setup proper information in the structure CCL. */ | |
4598 | ccl->eol_type = coding->eol_type; | |
4599 | if (ccl->eol_type ==CODING_EOL_UNDECIDED) | |
4600 | ccl->eol_type = CODING_EOL_LF; | |
4601 | ccl->cr_consumed = coding->spec.ccl.cr_carryover; | |
b671ed5e | 4602 | ccl->eight_bit_control = coding->dst_multibyte; |
80e0ca99 | 4603 | } |
b671ed5e KH |
4604 | else |
4605 | ccl->eight_bit_control = 1; | |
7272d75c | 4606 | ccl->multibyte = coding->src_multibyte; |
1c3478b0 KH |
4607 | if (coding->spec.ccl.eight_bit_carryover[0] != 0) |
4608 | { | |
4609 | /* Move carryover bytes to DESTINATION. */ | |
4610 | unsigned char *p = coding->spec.ccl.eight_bit_carryover; | |
4611 | while (*p) | |
4612 | *dst++ = *p++; | |
4613 | coding->spec.ccl.eight_bit_carryover[0] = 0; | |
4614 | if (dst_bytes) | |
4615 | dst_bytes -= dst - destination; | |
4616 | } | |
4617 | ||
4618 | coding->produced = (ccl_driver (ccl, source, dst, src_bytes, dst_bytes, | |
4619 | &(coding->consumed)) | |
4620 | + dst - destination); | |
4621 | ||
b73bfc1c | 4622 | if (encodep) |
80e0ca99 KH |
4623 | { |
4624 | coding->produced_char = coding->produced; | |
4625 | coding->spec.ccl.cr_carryover = ccl->cr_consumed; | |
4626 | } | |
ade8d05e KH |
4627 | else if (!ccl->eight_bit_control) |
4628 | { | |
4629 | /* The produced bytes forms a valid multibyte sequence. */ | |
4630 | coding->produced_char | |
4631 | = multibyte_chars_in_text (destination, coding->produced); | |
4632 | coding->spec.ccl.eight_bit_carryover[0] = 0; | |
4633 | } | |
b73bfc1c KH |
4634 | else |
4635 | { | |
1c3478b0 KH |
4636 | /* On decoding, the destination should always multibyte. But, |
4637 | CCL program might have been generated an invalid multibyte | |
4638 | sequence. Here we make such a sequence valid as | |
4639 | multibyte. */ | |
b73bfc1c KH |
4640 | int bytes |
4641 | = dst_bytes ? dst_bytes : source + coding->consumed - destination; | |
1c3478b0 KH |
4642 | |
4643 | if ((coding->consumed < src_bytes | |
4644 | || !ccl->last_block) | |
4645 | && coding->produced >= 1 | |
4646 | && destination[coding->produced - 1] >= 0x80) | |
4647 | { | |
4648 | /* We should not convert the tailing 8-bit codes to | |
4649 | multibyte form even if they doesn't form a valid | |
4650 | multibyte sequence. They may form a valid sequence in | |
4651 | the next call. */ | |
4652 | int carryover = 0; | |
4653 | ||
4654 | if (destination[coding->produced - 1] < 0xA0) | |
4655 | carryover = 1; | |
4656 | else if (coding->produced >= 2) | |
4657 | { | |
4658 | if (destination[coding->produced - 2] >= 0x80) | |
4659 | { | |
4660 | if (destination[coding->produced - 2] < 0xA0) | |
4661 | carryover = 2; | |
4662 | else if (coding->produced >= 3 | |
4663 | && destination[coding->produced - 3] >= 0x80 | |
4664 | && destination[coding->produced - 3] < 0xA0) | |
4665 | carryover = 3; | |
4666 | } | |
4667 | } | |
4668 | if (carryover > 0) | |
4669 | { | |
4670 | BCOPY_SHORT (destination + coding->produced - carryover, | |
4671 | coding->spec.ccl.eight_bit_carryover, | |
4672 | carryover); | |
4673 | coding->spec.ccl.eight_bit_carryover[carryover] = 0; | |
4674 | coding->produced -= carryover; | |
4675 | } | |
4676 | } | |
b73bfc1c KH |
4677 | coding->produced = str_as_multibyte (destination, bytes, |
4678 | coding->produced, | |
4679 | &(coding->produced_char)); | |
4680 | } | |
69f76525 | 4681 | |
d46c5b12 KH |
4682 | switch (ccl->status) |
4683 | { | |
4684 | case CCL_STAT_SUSPEND_BY_SRC: | |
73be902c | 4685 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; |
d46c5b12 KH |
4686 | break; |
4687 | case CCL_STAT_SUSPEND_BY_DST: | |
73be902c | 4688 | coding->result = CODING_FINISH_INSUFFICIENT_DST; |
d46c5b12 | 4689 | break; |
9864ebce KH |
4690 | case CCL_STAT_QUIT: |
4691 | case CCL_STAT_INVALID_CMD: | |
73be902c | 4692 | coding->result = CODING_FINISH_INTERRUPT; |
9864ebce | 4693 | break; |
d46c5b12 | 4694 | default: |
73be902c | 4695 | coding->result = CODING_FINISH_NORMAL; |
d46c5b12 KH |
4696 | break; |
4697 | } | |
73be902c | 4698 | return coding->result; |
4ed46869 KH |
4699 | } |
4700 | ||
aaaf0b1e KH |
4701 | /* Decode EOL format of the text at PTR of BYTES length destructively |
4702 | according to CODING->eol_type. This is called after the CCL | |
4703 | program produced a decoded text at PTR. If we do CRLF->LF | |
4704 | conversion, update CODING->produced and CODING->produced_char. */ | |
4705 | ||
4706 | static void | |
4707 | decode_eol_post_ccl (coding, ptr, bytes) | |
4708 | struct coding_system *coding; | |
4709 | unsigned char *ptr; | |
4710 | int bytes; | |
4711 | { | |
4712 | Lisp_Object val, saved_coding_symbol; | |
4713 | unsigned char *pend = ptr + bytes; | |
4714 | int dummy; | |
4715 | ||
4716 | /* Remember the current coding system symbol. We set it back when | |
4717 | an inconsistent EOL is found so that `last-coding-system-used' is | |
4718 | set to the coding system that doesn't specify EOL conversion. */ | |
4719 | saved_coding_symbol = coding->symbol; | |
4720 | ||
4721 | coding->spec.ccl.cr_carryover = 0; | |
4722 | if (coding->eol_type == CODING_EOL_UNDECIDED) | |
4723 | { | |
4724 | /* Here, to avoid the call of setup_coding_system, we directly | |
4725 | call detect_eol_type. */ | |
4726 | coding->eol_type = detect_eol_type (ptr, bytes, &dummy); | |
74b01b80 EZ |
4727 | if (coding->eol_type == CODING_EOL_INCONSISTENT) |
4728 | coding->eol_type = CODING_EOL_LF; | |
4729 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
4730 | { | |
4731 | val = Fget (coding->symbol, Qeol_type); | |
4732 | if (VECTORP (val) && XVECTOR (val)->size == 3) | |
4733 | coding->symbol = XVECTOR (val)->contents[coding->eol_type]; | |
4734 | } | |
aaaf0b1e KH |
4735 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
4736 | } | |
4737 | ||
74b01b80 EZ |
4738 | if (coding->eol_type == CODING_EOL_LF |
4739 | || coding->eol_type == CODING_EOL_UNDECIDED) | |
aaaf0b1e KH |
4740 | { |
4741 | /* We have nothing to do. */ | |
4742 | ptr = pend; | |
4743 | } | |
4744 | else if (coding->eol_type == CODING_EOL_CRLF) | |
4745 | { | |
4746 | unsigned char *pstart = ptr, *p = ptr; | |
4747 | ||
4748 | if (! (coding->mode & CODING_MODE_LAST_BLOCK) | |
4749 | && *(pend - 1) == '\r') | |
4750 | { | |
4751 | /* If the last character is CR, we can't handle it here | |
4752 | because LF will be in the not-yet-decoded source text. | |
9861e777 | 4753 | Record that the CR is not yet processed. */ |
aaaf0b1e KH |
4754 | coding->spec.ccl.cr_carryover = 1; |
4755 | coding->produced--; | |
4756 | coding->produced_char--; | |
4757 | pend--; | |
4758 | } | |
4759 | while (ptr < pend) | |
4760 | { | |
4761 | if (*ptr == '\r') | |
4762 | { | |
4763 | if (ptr + 1 < pend && *(ptr + 1) == '\n') | |
4764 | { | |
4765 | *p++ = '\n'; | |
4766 | ptr += 2; | |
4767 | } | |
4768 | else | |
4769 | { | |
4770 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4771 | goto undo_eol_conversion; | |
4772 | *p++ = *ptr++; | |
4773 | } | |
4774 | } | |
4775 | else if (*ptr == '\n' | |
4776 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4777 | goto undo_eol_conversion; | |
4778 | else | |
4779 | *p++ = *ptr++; | |
4780 | continue; | |
4781 | ||
4782 | undo_eol_conversion: | |
4783 | /* We have faced with inconsistent EOL format at PTR. | |
4784 | Convert all LFs before PTR back to CRLFs. */ | |
4785 | for (p--, ptr--; p >= pstart; p--) | |
4786 | { | |
4787 | if (*p == '\n') | |
4788 | *ptr-- = '\n', *ptr-- = '\r'; | |
4789 | else | |
4790 | *ptr-- = *p; | |
4791 | } | |
4792 | /* If carryover is recorded, cancel it because we don't | |
4793 | convert CRLF anymore. */ | |
4794 | if (coding->spec.ccl.cr_carryover) | |
4795 | { | |
4796 | coding->spec.ccl.cr_carryover = 0; | |
4797 | coding->produced++; | |
4798 | coding->produced_char++; | |
4799 | pend++; | |
4800 | } | |
4801 | p = ptr = pend; | |
4802 | coding->eol_type = CODING_EOL_LF; | |
4803 | coding->symbol = saved_coding_symbol; | |
4804 | } | |
4805 | if (p < pend) | |
4806 | { | |
4807 | /* As each two-byte sequence CRLF was converted to LF, (PEND | |
4808 | - P) is the number of deleted characters. */ | |
4809 | coding->produced -= pend - p; | |
4810 | coding->produced_char -= pend - p; | |
4811 | } | |
4812 | } | |
4813 | else /* i.e. coding->eol_type == CODING_EOL_CR */ | |
4814 | { | |
4815 | unsigned char *p = ptr; | |
4816 | ||
4817 | for (; ptr < pend; ptr++) | |
4818 | { | |
4819 | if (*ptr == '\r') | |
4820 | *ptr = '\n'; | |
4821 | else if (*ptr == '\n' | |
4822 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4823 | { | |
4824 | for (; p < ptr; p++) | |
4825 | { | |
4826 | if (*p == '\n') | |
4827 | *p = '\r'; | |
4828 | } | |
4829 | ptr = pend; | |
4830 | coding->eol_type = CODING_EOL_LF; | |
4831 | coding->symbol = saved_coding_symbol; | |
4832 | } | |
4833 | } | |
4834 | } | |
4835 | } | |
4836 | ||
4ed46869 KH |
4837 | /* See "GENERAL NOTES about `decode_coding_XXX ()' functions". Before |
4838 | decoding, it may detect coding system and format of end-of-line if | |
b73bfc1c KH |
4839 | those are not yet decided. The source should be unibyte, the |
4840 | result is multibyte if CODING->dst_multibyte is nonzero, else | |
4841 | unibyte. */ | |
4ed46869 KH |
4842 | |
4843 | int | |
d46c5b12 | 4844 | decode_coding (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 4845 | struct coding_system *coding; |
a4244313 KR |
4846 | const unsigned char *source; |
4847 | unsigned char *destination; | |
4ed46869 | 4848 | int src_bytes, dst_bytes; |
4ed46869 | 4849 | { |
9861e777 EZ |
4850 | int extra = 0; |
4851 | ||
0ef69138 | 4852 | if (coding->type == coding_type_undecided) |
4ed46869 KH |
4853 | detect_coding (coding, source, src_bytes); |
4854 | ||
aaaf0b1e KH |
4855 | if (coding->eol_type == CODING_EOL_UNDECIDED |
4856 | && coding->type != coding_type_ccl) | |
8844fa83 KH |
4857 | { |
4858 | detect_eol (coding, source, src_bytes); | |
4859 | /* We had better recover the original eol format if we | |
8ca3766a | 4860 | encounter an inconsistent eol format while decoding. */ |
8844fa83 KH |
4861 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
4862 | } | |
4ed46869 | 4863 | |
b73bfc1c KH |
4864 | coding->produced = coding->produced_char = 0; |
4865 | coding->consumed = coding->consumed_char = 0; | |
4866 | coding->errors = 0; | |
4867 | coding->result = CODING_FINISH_NORMAL; | |
4868 | ||
4ed46869 KH |
4869 | switch (coding->type) |
4870 | { | |
4ed46869 | 4871 | case coding_type_sjis: |
b73bfc1c KH |
4872 | decode_coding_sjis_big5 (coding, source, destination, |
4873 | src_bytes, dst_bytes, 1); | |
4ed46869 KH |
4874 | break; |
4875 | ||
4876 | case coding_type_iso2022: | |
b73bfc1c KH |
4877 | decode_coding_iso2022 (coding, source, destination, |
4878 | src_bytes, dst_bytes); | |
4ed46869 KH |
4879 | break; |
4880 | ||
4881 | case coding_type_big5: | |
b73bfc1c KH |
4882 | decode_coding_sjis_big5 (coding, source, destination, |
4883 | src_bytes, dst_bytes, 0); | |
4884 | break; | |
4885 | ||
4886 | case coding_type_emacs_mule: | |
4887 | decode_coding_emacs_mule (coding, source, destination, | |
4888 | src_bytes, dst_bytes); | |
4ed46869 KH |
4889 | break; |
4890 | ||
4891 | case coding_type_ccl: | |
aaaf0b1e KH |
4892 | if (coding->spec.ccl.cr_carryover) |
4893 | { | |
9861e777 EZ |
4894 | /* Put the CR which was not processed by the previous call |
4895 | of decode_eol_post_ccl in DESTINATION. It will be | |
4896 | decoded together with the following LF by the call to | |
4897 | decode_eol_post_ccl below. */ | |
aaaf0b1e KH |
4898 | *destination = '\r'; |
4899 | coding->produced++; | |
4900 | coding->produced_char++; | |
4901 | dst_bytes--; | |
9861e777 | 4902 | extra = coding->spec.ccl.cr_carryover; |
aaaf0b1e | 4903 | } |
9861e777 | 4904 | ccl_coding_driver (coding, source, destination + extra, |
b73bfc1c | 4905 | src_bytes, dst_bytes, 0); |
aaaf0b1e | 4906 | if (coding->eol_type != CODING_EOL_LF) |
9861e777 EZ |
4907 | { |
4908 | coding->produced += extra; | |
4909 | coding->produced_char += extra; | |
4910 | decode_eol_post_ccl (coding, destination, coding->produced); | |
4911 | } | |
d46c5b12 KH |
4912 | break; |
4913 | ||
b73bfc1c KH |
4914 | default: |
4915 | decode_eol (coding, source, destination, src_bytes, dst_bytes); | |
4916 | } | |
4917 | ||
4918 | if (coding->result == CODING_FINISH_INSUFFICIENT_SRC | |
e7c9eef9 | 4919 | && coding->mode & CODING_MODE_LAST_BLOCK |
b73bfc1c KH |
4920 | && coding->consumed == src_bytes) |
4921 | coding->result = CODING_FINISH_NORMAL; | |
4922 | ||
4923 | if (coding->mode & CODING_MODE_LAST_BLOCK | |
4924 | && coding->result == CODING_FINISH_INSUFFICIENT_SRC) | |
4925 | { | |
a4244313 | 4926 | const unsigned char *src = source + coding->consumed; |
b73bfc1c KH |
4927 | unsigned char *dst = destination + coding->produced; |
4928 | ||
4929 | src_bytes -= coding->consumed; | |
bb10be8b | 4930 | coding->errors++; |
b73bfc1c KH |
4931 | if (COMPOSING_P (coding)) |
4932 | DECODE_COMPOSITION_END ('1'); | |
4933 | while (src_bytes--) | |
d46c5b12 | 4934 | { |
b73bfc1c KH |
4935 | int c = *src++; |
4936 | dst += CHAR_STRING (c, dst); | |
4937 | coding->produced_char++; | |
d46c5b12 | 4938 | } |
b73bfc1c KH |
4939 | coding->consumed = coding->consumed_char = src - source; |
4940 | coding->produced = dst - destination; | |
73be902c | 4941 | coding->result = CODING_FINISH_NORMAL; |
4ed46869 KH |
4942 | } |
4943 | ||
b73bfc1c KH |
4944 | if (!coding->dst_multibyte) |
4945 | { | |
4946 | coding->produced = str_as_unibyte (destination, coding->produced); | |
4947 | coding->produced_char = coding->produced; | |
4948 | } | |
4ed46869 | 4949 | |
b73bfc1c KH |
4950 | return coding->result; |
4951 | } | |
52d41803 | 4952 | |
b73bfc1c KH |
4953 | /* See "GENERAL NOTES about `encode_coding_XXX ()' functions". The |
4954 | multibyteness of the source is CODING->src_multibyte, the | |
4955 | multibyteness of the result is always unibyte. */ | |
4ed46869 KH |
4956 | |
4957 | int | |
d46c5b12 | 4958 | encode_coding (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 4959 | struct coding_system *coding; |
a4244313 KR |
4960 | const unsigned char *source; |
4961 | unsigned char *destination; | |
4ed46869 | 4962 | int src_bytes, dst_bytes; |
4ed46869 | 4963 | { |
b73bfc1c KH |
4964 | coding->produced = coding->produced_char = 0; |
4965 | coding->consumed = coding->consumed_char = 0; | |
4966 | coding->errors = 0; | |
4967 | coding->result = CODING_FINISH_NORMAL; | |
4ed46869 | 4968 | |
d46c5b12 KH |
4969 | switch (coding->type) |
4970 | { | |
4ed46869 | 4971 | case coding_type_sjis: |
b73bfc1c KH |
4972 | encode_coding_sjis_big5 (coding, source, destination, |
4973 | src_bytes, dst_bytes, 1); | |
4ed46869 KH |
4974 | break; |
4975 | ||
4976 | case coding_type_iso2022: | |
b73bfc1c KH |
4977 | encode_coding_iso2022 (coding, source, destination, |
4978 | src_bytes, dst_bytes); | |
4ed46869 KH |
4979 | break; |
4980 | ||
4981 | case coding_type_big5: | |
b73bfc1c KH |
4982 | encode_coding_sjis_big5 (coding, source, destination, |
4983 | src_bytes, dst_bytes, 0); | |
4984 | break; | |
4985 | ||
4986 | case coding_type_emacs_mule: | |
4987 | encode_coding_emacs_mule (coding, source, destination, | |
4988 | src_bytes, dst_bytes); | |
4ed46869 KH |
4989 | break; |
4990 | ||
4991 | case coding_type_ccl: | |
b73bfc1c KH |
4992 | ccl_coding_driver (coding, source, destination, |
4993 | src_bytes, dst_bytes, 1); | |
d46c5b12 KH |
4994 | break; |
4995 | ||
b73bfc1c KH |
4996 | default: |
4997 | encode_eol (coding, source, destination, src_bytes, dst_bytes); | |
4998 | } | |
4999 | ||
73be902c KH |
5000 | if (coding->mode & CODING_MODE_LAST_BLOCK |
5001 | && coding->result == CODING_FINISH_INSUFFICIENT_SRC) | |
b73bfc1c | 5002 | { |
a4244313 | 5003 | const unsigned char *src = source + coding->consumed; |
b73bfc1c KH |
5004 | unsigned char *dst = destination + coding->produced; |
5005 | ||
5006 | if (coding->type == coding_type_iso2022) | |
5007 | ENCODE_RESET_PLANE_AND_REGISTER; | |
5008 | if (COMPOSING_P (coding)) | |
5009 | *dst++ = ISO_CODE_ESC, *dst++ = '1'; | |
5010 | if (coding->consumed < src_bytes) | |
d46c5b12 | 5011 | { |
b73bfc1c KH |
5012 | int len = src_bytes - coding->consumed; |
5013 | ||
fabf4a91 | 5014 | BCOPY_SHORT (src, dst, len); |
b73bfc1c KH |
5015 | if (coding->src_multibyte) |
5016 | len = str_as_unibyte (dst, len); | |
5017 | dst += len; | |
5018 | coding->consumed = src_bytes; | |
d46c5b12 | 5019 | } |
b73bfc1c | 5020 | coding->produced = coding->produced_char = dst - destination; |
73be902c | 5021 | coding->result = CODING_FINISH_NORMAL; |
4ed46869 KH |
5022 | } |
5023 | ||
bb10be8b KH |
5024 | if (coding->result == CODING_FINISH_INSUFFICIENT_SRC |
5025 | && coding->consumed == src_bytes) | |
5026 | coding->result = CODING_FINISH_NORMAL; | |
5027 | ||
b73bfc1c | 5028 | return coding->result; |
4ed46869 KH |
5029 | } |
5030 | ||
fb88bf2d KH |
5031 | /* Scan text in the region between *BEG and *END (byte positions), |
5032 | skip characters which we don't have to decode by coding system | |
5033 | CODING at the head and tail, then set *BEG and *END to the region | |
5034 | of the text we actually have to convert. The caller should move | |
b73bfc1c KH |
5035 | the gap out of the region in advance if the region is from a |
5036 | buffer. | |
4ed46869 | 5037 | |
d46c5b12 KH |
5038 | If STR is not NULL, *BEG and *END are indices into STR. */ |
5039 | ||
5040 | static void | |
5041 | shrink_decoding_region (beg, end, coding, str) | |
5042 | int *beg, *end; | |
5043 | struct coding_system *coding; | |
5044 | unsigned char *str; | |
5045 | { | |
fb88bf2d | 5046 | unsigned char *begp_orig, *begp, *endp_orig, *endp, c; |
d46c5b12 | 5047 | int eol_conversion; |
88993dfd | 5048 | Lisp_Object translation_table; |
d46c5b12 KH |
5049 | |
5050 | if (coding->type == coding_type_ccl | |
5051 | || coding->type == coding_type_undecided | |
b73bfc1c KH |
5052 | || coding->eol_type != CODING_EOL_LF |
5053 | || !NILP (coding->post_read_conversion) | |
5054 | || coding->composing != COMPOSITION_DISABLED) | |
d46c5b12 KH |
5055 | { |
5056 | /* We can't skip any data. */ | |
5057 | return; | |
5058 | } | |
b73bfc1c KH |
5059 | if (coding->type == coding_type_no_conversion |
5060 | || coding->type == coding_type_raw_text | |
5061 | || coding->type == coding_type_emacs_mule) | |
d46c5b12 | 5062 | { |
fb88bf2d KH |
5063 | /* We need no conversion, but don't have to skip any data here. |
5064 | Decoding routine handles them effectively anyway. */ | |
d46c5b12 KH |
5065 | return; |
5066 | } | |
5067 | ||
88993dfd KH |
5068 | translation_table = coding->translation_table_for_decode; |
5069 | if (NILP (translation_table) && !NILP (Venable_character_translation)) | |
5070 | translation_table = Vstandard_translation_table_for_decode; | |
5071 | if (CHAR_TABLE_P (translation_table)) | |
5072 | { | |
5073 | int i; | |
5074 | for (i = 0; i < 128; i++) | |
5075 | if (!NILP (CHAR_TABLE_REF (translation_table, i))) | |
5076 | break; | |
5077 | if (i < 128) | |
fa46990e | 5078 | /* Some ASCII character should be translated. We give up |
88993dfd KH |
5079 | shrinking. */ |
5080 | return; | |
5081 | } | |
5082 | ||
b73bfc1c | 5083 | if (coding->heading_ascii >= 0) |
d46c5b12 KH |
5084 | /* Detection routine has already found how much we can skip at the |
5085 | head. */ | |
5086 | *beg += coding->heading_ascii; | |
5087 | ||
5088 | if (str) | |
5089 | { | |
5090 | begp_orig = begp = str + *beg; | |
5091 | endp_orig = endp = str + *end; | |
5092 | } | |
5093 | else | |
5094 | { | |
fb88bf2d | 5095 | begp_orig = begp = BYTE_POS_ADDR (*beg); |
d46c5b12 KH |
5096 | endp_orig = endp = begp + *end - *beg; |
5097 | } | |
5098 | ||
fa46990e DL |
5099 | eol_conversion = (coding->eol_type == CODING_EOL_CR |
5100 | || coding->eol_type == CODING_EOL_CRLF); | |
5101 | ||
d46c5b12 KH |
5102 | switch (coding->type) |
5103 | { | |
d46c5b12 KH |
5104 | case coding_type_sjis: |
5105 | case coding_type_big5: | |
5106 | /* We can skip all ASCII characters at the head. */ | |
5107 | if (coding->heading_ascii < 0) | |
5108 | { | |
5109 | if (eol_conversion) | |
de9d083c | 5110 | while (begp < endp && *begp < 0x80 && *begp != '\r') begp++; |
d46c5b12 KH |
5111 | else |
5112 | while (begp < endp && *begp < 0x80) begp++; | |
5113 | } | |
5114 | /* We can skip all ASCII characters at the tail except for the | |
5115 | second byte of SJIS or BIG5 code. */ | |
5116 | if (eol_conversion) | |
de9d083c | 5117 | while (begp < endp && endp[-1] < 0x80 && endp[-1] != '\r') endp--; |
d46c5b12 KH |
5118 | else |
5119 | while (begp < endp && endp[-1] < 0x80) endp--; | |
ee59c65f RS |
5120 | /* Do not consider LF as ascii if preceded by CR, since that |
5121 | confuses eol decoding. */ | |
5122 | if (begp < endp && endp < endp_orig && endp[-1] == '\r' && endp[0] == '\n') | |
5123 | endp++; | |
d46c5b12 KH |
5124 | if (begp < endp && endp < endp_orig && endp[-1] >= 0x80) |
5125 | endp++; | |
5126 | break; | |
5127 | ||
b73bfc1c | 5128 | case coding_type_iso2022: |
622fece5 KH |
5129 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, 0) != CHARSET_ASCII) |
5130 | /* We can't skip any data. */ | |
5131 | break; | |
d46c5b12 KH |
5132 | if (coding->heading_ascii < 0) |
5133 | { | |
d46c5b12 KH |
5134 | /* We can skip all ASCII characters at the head except for a |
5135 | few control codes. */ | |
5136 | while (begp < endp && (c = *begp) < 0x80 | |
5137 | && c != ISO_CODE_CR && c != ISO_CODE_SO | |
5138 | && c != ISO_CODE_SI && c != ISO_CODE_ESC | |
5139 | && (!eol_conversion || c != ISO_CODE_LF)) | |
5140 | begp++; | |
5141 | } | |
5142 | switch (coding->category_idx) | |
5143 | { | |
5144 | case CODING_CATEGORY_IDX_ISO_8_1: | |
5145 | case CODING_CATEGORY_IDX_ISO_8_2: | |
5146 | /* We can skip all ASCII characters at the tail. */ | |
5147 | if (eol_conversion) | |
de9d083c | 5148 | while (begp < endp && (c = endp[-1]) < 0x80 && c != '\r') endp--; |
d46c5b12 KH |
5149 | else |
5150 | while (begp < endp && endp[-1] < 0x80) endp--; | |
ee59c65f RS |
5151 | /* Do not consider LF as ascii if preceded by CR, since that |
5152 | confuses eol decoding. */ | |
5153 | if (begp < endp && endp < endp_orig && endp[-1] == '\r' && endp[0] == '\n') | |
5154 | endp++; | |
d46c5b12 KH |
5155 | break; |
5156 | ||
5157 | case CODING_CATEGORY_IDX_ISO_7: | |
5158 | case CODING_CATEGORY_IDX_ISO_7_TIGHT: | |
de79a6a5 | 5159 | { |
8ca3766a | 5160 | /* We can skip all characters at the tail except for 8-bit |
de79a6a5 KH |
5161 | codes and ESC and the following 2-byte at the tail. */ |
5162 | unsigned char *eight_bit = NULL; | |
5163 | ||
5164 | if (eol_conversion) | |
5165 | while (begp < endp | |
5166 | && (c = endp[-1]) != ISO_CODE_ESC && c != '\r') | |
5167 | { | |
5168 | if (!eight_bit && c & 0x80) eight_bit = endp; | |
5169 | endp--; | |
5170 | } | |
5171 | else | |
5172 | while (begp < endp | |
5173 | && (c = endp[-1]) != ISO_CODE_ESC) | |
5174 | { | |
5175 | if (!eight_bit && c & 0x80) eight_bit = endp; | |
5176 | endp--; | |
5177 | } | |
5178 | /* Do not consider LF as ascii if preceded by CR, since that | |
5179 | confuses eol decoding. */ | |
5180 | if (begp < endp && endp < endp_orig | |
5181 | && endp[-1] == '\r' && endp[0] == '\n') | |
5182 | endp++; | |
5183 | if (begp < endp && endp[-1] == ISO_CODE_ESC) | |
5184 | { | |
5185 | if (endp + 1 < endp_orig && end[0] == '(' && end[1] == 'B') | |
5186 | /* This is an ASCII designation sequence. We can | |
5187 | surely skip the tail. But, if we have | |
5188 | encountered an 8-bit code, skip only the codes | |
5189 | after that. */ | |
5190 | endp = eight_bit ? eight_bit : endp + 2; | |
5191 | else | |
5192 | /* Hmmm, we can't skip the tail. */ | |
5193 | endp = endp_orig; | |
5194 | } | |
5195 | else if (eight_bit) | |
5196 | endp = eight_bit; | |
5197 | } | |
d46c5b12 | 5198 | } |
b73bfc1c KH |
5199 | break; |
5200 | ||
5201 | default: | |
5202 | abort (); | |
d46c5b12 KH |
5203 | } |
5204 | *beg += begp - begp_orig; | |
5205 | *end += endp - endp_orig; | |
5206 | return; | |
5207 | } | |
5208 | ||
5209 | /* Like shrink_decoding_region but for encoding. */ | |
5210 | ||
5211 | static void | |
5212 | shrink_encoding_region (beg, end, coding, str) | |
5213 | int *beg, *end; | |
5214 | struct coding_system *coding; | |
5215 | unsigned char *str; | |
5216 | { | |
5217 | unsigned char *begp_orig, *begp, *endp_orig, *endp; | |
5218 | int eol_conversion; | |
88993dfd | 5219 | Lisp_Object translation_table; |
d46c5b12 | 5220 | |
b73bfc1c KH |
5221 | if (coding->type == coding_type_ccl |
5222 | || coding->eol_type == CODING_EOL_CRLF | |
5223 | || coding->eol_type == CODING_EOL_CR | |
87323294 | 5224 | || (coding->cmp_data && coding->cmp_data->used > 0)) |
d46c5b12 | 5225 | { |
b73bfc1c KH |
5226 | /* We can't skip any data. */ |
5227 | return; | |
5228 | } | |
5229 | if (coding->type == coding_type_no_conversion | |
5230 | || coding->type == coding_type_raw_text | |
5231 | || coding->type == coding_type_emacs_mule | |
5232 | || coding->type == coding_type_undecided) | |
5233 | { | |
5234 | /* We need no conversion, but don't have to skip any data here. | |
5235 | Encoding routine handles them effectively anyway. */ | |
d46c5b12 KH |
5236 | return; |
5237 | } | |
5238 | ||
88993dfd KH |
5239 | translation_table = coding->translation_table_for_encode; |
5240 | if (NILP (translation_table) && !NILP (Venable_character_translation)) | |
5241 | translation_table = Vstandard_translation_table_for_encode; | |
5242 | if (CHAR_TABLE_P (translation_table)) | |
5243 | { | |
5244 | int i; | |
5245 | for (i = 0; i < 128; i++) | |
5246 | if (!NILP (CHAR_TABLE_REF (translation_table, i))) | |
5247 | break; | |
5248 | if (i < 128) | |
8ca3766a | 5249 | /* Some ASCII character should be translated. We give up |
88993dfd KH |
5250 | shrinking. */ |
5251 | return; | |
5252 | } | |
5253 | ||
d46c5b12 KH |
5254 | if (str) |
5255 | { | |
5256 | begp_orig = begp = str + *beg; | |
5257 | endp_orig = endp = str + *end; | |
5258 | } | |
5259 | else | |
5260 | { | |
fb88bf2d | 5261 | begp_orig = begp = BYTE_POS_ADDR (*beg); |
d46c5b12 KH |
5262 | endp_orig = endp = begp + *end - *beg; |
5263 | } | |
5264 | ||
5265 | eol_conversion = (coding->eol_type == CODING_EOL_CR | |
5266 | || coding->eol_type == CODING_EOL_CRLF); | |
5267 | ||
5268 | /* Here, we don't have to check coding->pre_write_conversion because | |
5269 | the caller is expected to have handled it already. */ | |
5270 | switch (coding->type) | |
5271 | { | |
d46c5b12 | 5272 | case coding_type_iso2022: |
622fece5 KH |
5273 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, 0) != CHARSET_ASCII) |
5274 | /* We can't skip any data. */ | |
5275 | break; | |
d46c5b12 KH |
5276 | if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL) |
5277 | { | |
93dec019 | 5278 | unsigned char *bol = begp; |
d46c5b12 KH |
5279 | while (begp < endp && *begp < 0x80) |
5280 | { | |
5281 | begp++; | |
5282 | if (begp[-1] == '\n') | |
5283 | bol = begp; | |
5284 | } | |
5285 | begp = bol; | |
5286 | goto label_skip_tail; | |
5287 | } | |
5288 | /* fall down ... */ | |
5289 | ||
b73bfc1c KH |
5290 | case coding_type_sjis: |
5291 | case coding_type_big5: | |
d46c5b12 KH |
5292 | /* We can skip all ASCII characters at the head and tail. */ |
5293 | if (eol_conversion) | |
5294 | while (begp < endp && *begp < 0x80 && *begp != '\n') begp++; | |
5295 | else | |
5296 | while (begp < endp && *begp < 0x80) begp++; | |
5297 | label_skip_tail: | |
5298 | if (eol_conversion) | |
5299 | while (begp < endp && endp[-1] < 0x80 && endp[-1] != '\n') endp--; | |
5300 | else | |
5301 | while (begp < endp && *(endp - 1) < 0x80) endp--; | |
5302 | break; | |
b73bfc1c KH |
5303 | |
5304 | default: | |
5305 | abort (); | |
d46c5b12 KH |
5306 | } |
5307 | ||
5308 | *beg += begp - begp_orig; | |
5309 | *end += endp - endp_orig; | |
5310 | return; | |
5311 | } | |
5312 | ||
88993dfd KH |
5313 | /* As shrinking conversion region requires some overhead, we don't try |
5314 | shrinking if the length of conversion region is less than this | |
5315 | value. */ | |
5316 | static int shrink_conversion_region_threshhold = 1024; | |
5317 | ||
5318 | #define SHRINK_CONVERSION_REGION(beg, end, coding, str, encodep) \ | |
5319 | do { \ | |
5320 | if (*(end) - *(beg) > shrink_conversion_region_threshhold) \ | |
5321 | { \ | |
5322 | if (encodep) shrink_encoding_region (beg, end, coding, str); \ | |
5323 | else shrink_decoding_region (beg, end, coding, str); \ | |
5324 | } \ | |
5325 | } while (0) | |
5326 | ||
b843d1ae | 5327 | static Lisp_Object |
1c7457e2 KH |
5328 | code_convert_region_unwind (arg) |
5329 | Lisp_Object arg; | |
b843d1ae KH |
5330 | { |
5331 | inhibit_pre_post_conversion = 0; | |
1c7457e2 | 5332 | Vlast_coding_system_used = arg; |
b843d1ae KH |
5333 | return Qnil; |
5334 | } | |
5335 | ||
ec6d2bb8 KH |
5336 | /* Store information about all compositions in the range FROM and TO |
5337 | of OBJ in memory blocks pointed by CODING->cmp_data. OBJ is a | |
5338 | buffer or a string, defaults to the current buffer. */ | |
5339 | ||
5340 | void | |
5341 | coding_save_composition (coding, from, to, obj) | |
5342 | struct coding_system *coding; | |
5343 | int from, to; | |
5344 | Lisp_Object obj; | |
5345 | { | |
5346 | Lisp_Object prop; | |
5347 | int start, end; | |
5348 | ||
91bee881 KH |
5349 | if (coding->composing == COMPOSITION_DISABLED) |
5350 | return; | |
5351 | if (!coding->cmp_data) | |
5352 | coding_allocate_composition_data (coding, from); | |
ec6d2bb8 KH |
5353 | if (!find_composition (from, to, &start, &end, &prop, obj) |
5354 | || end > to) | |
5355 | return; | |
5356 | if (start < from | |
5357 | && (!find_composition (end, to, &start, &end, &prop, obj) | |
5358 | || end > to)) | |
5359 | return; | |
5360 | coding->composing = COMPOSITION_NO; | |
ec6d2bb8 KH |
5361 | do |
5362 | { | |
5363 | if (COMPOSITION_VALID_P (start, end, prop)) | |
5364 | { | |
5365 | enum composition_method method = COMPOSITION_METHOD (prop); | |
5366 | if (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH | |
5367 | >= COMPOSITION_DATA_SIZE) | |
5368 | coding_allocate_composition_data (coding, from); | |
5369 | /* For relative composition, we remember start and end | |
5370 | positions, for the other compositions, we also remember | |
5371 | components. */ | |
5372 | CODING_ADD_COMPOSITION_START (coding, start - from, method); | |
5373 | if (method != COMPOSITION_RELATIVE) | |
5374 | { | |
5375 | /* We must store a*/ | |
5376 | Lisp_Object val, ch; | |
5377 | ||
5378 | val = COMPOSITION_COMPONENTS (prop); | |
5379 | if (CONSP (val)) | |
5380 | while (CONSP (val)) | |
5381 | { | |
5382 | ch = XCAR (val), val = XCDR (val); | |
5383 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (ch)); | |
5384 | } | |
5385 | else if (VECTORP (val) || STRINGP (val)) | |
5386 | { | |
5387 | int len = (VECTORP (val) | |
d5db4077 | 5388 | ? XVECTOR (val)->size : SCHARS (val)); |
ec6d2bb8 KH |
5389 | int i; |
5390 | for (i = 0; i < len; i++) | |
5391 | { | |
5392 | ch = (STRINGP (val) | |
5393 | ? Faref (val, make_number (i)) | |
5394 | : XVECTOR (val)->contents[i]); | |
5395 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (ch)); | |
5396 | } | |
5397 | } | |
5398 | else /* INTEGERP (val) */ | |
5399 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (val)); | |
5400 | } | |
5401 | CODING_ADD_COMPOSITION_END (coding, end - from); | |
5402 | } | |
5403 | start = end; | |
5404 | } | |
5405 | while (start < to | |
5406 | && find_composition (start, to, &start, &end, &prop, obj) | |
5407 | && end <= to); | |
5408 | ||
5409 | /* Make coding->cmp_data point to the first memory block. */ | |
5410 | while (coding->cmp_data->prev) | |
5411 | coding->cmp_data = coding->cmp_data->prev; | |
5412 | coding->cmp_data_start = 0; | |
5413 | } | |
5414 | ||
5415 | /* Reflect the saved information about compositions to OBJ. | |
8ca3766a | 5416 | CODING->cmp_data points to a memory block for the information. OBJ |
ec6d2bb8 KH |
5417 | is a buffer or a string, defaults to the current buffer. */ |
5418 | ||
33fb63eb | 5419 | void |
ec6d2bb8 KH |
5420 | coding_restore_composition (coding, obj) |
5421 | struct coding_system *coding; | |
5422 | Lisp_Object obj; | |
5423 | { | |
5424 | struct composition_data *cmp_data = coding->cmp_data; | |
5425 | ||
5426 | if (!cmp_data) | |
5427 | return; | |
5428 | ||
5429 | while (cmp_data->prev) | |
5430 | cmp_data = cmp_data->prev; | |
5431 | ||
5432 | while (cmp_data) | |
5433 | { | |
5434 | int i; | |
5435 | ||
78108bcd KH |
5436 | for (i = 0; i < cmp_data->used && cmp_data->data[i] > 0; |
5437 | i += cmp_data->data[i]) | |
ec6d2bb8 KH |
5438 | { |
5439 | int *data = cmp_data->data + i; | |
5440 | enum composition_method method = (enum composition_method) data[3]; | |
5441 | Lisp_Object components; | |
5442 | ||
5443 | if (method == COMPOSITION_RELATIVE) | |
5444 | components = Qnil; | |
5445 | else | |
5446 | { | |
5447 | int len = data[0] - 4, j; | |
5448 | Lisp_Object args[MAX_COMPOSITION_COMPONENTS * 2 - 1]; | |
5449 | ||
b6871cc7 KH |
5450 | if (method == COMPOSITION_WITH_RULE_ALTCHARS |
5451 | && len % 2 == 0) | |
5452 | len --; | |
ec6d2bb8 KH |
5453 | for (j = 0; j < len; j++) |
5454 | args[j] = make_number (data[4 + j]); | |
5455 | components = (method == COMPOSITION_WITH_ALTCHARS | |
5456 | ? Fstring (len, args) : Fvector (len, args)); | |
5457 | } | |
5458 | compose_text (data[1], data[2], components, Qnil, obj); | |
5459 | } | |
5460 | cmp_data = cmp_data->next; | |
5461 | } | |
5462 | } | |
5463 | ||
d46c5b12 | 5464 | /* Decode (if ENCODEP is zero) or encode (if ENCODEP is nonzero) the |
fb88bf2d KH |
5465 | text from FROM to TO (byte positions are FROM_BYTE and TO_BYTE) by |
5466 | coding system CODING, and return the status code of code conversion | |
5467 | (currently, this value has no meaning). | |
5468 | ||
5469 | How many characters (and bytes) are converted to how many | |
5470 | characters (and bytes) are recorded in members of the structure | |
5471 | CODING. | |
d46c5b12 | 5472 | |
6e44253b | 5473 | If REPLACE is nonzero, we do various things as if the original text |
d46c5b12 | 5474 | is deleted and a new text is inserted. See the comments in |
b73bfc1c KH |
5475 | replace_range (insdel.c) to know what we are doing. |
5476 | ||
5477 | If REPLACE is zero, it is assumed that the source text is unibyte. | |
8ca3766a | 5478 | Otherwise, it is assumed that the source text is multibyte. */ |
4ed46869 KH |
5479 | |
5480 | int | |
6e44253b KH |
5481 | code_convert_region (from, from_byte, to, to_byte, coding, encodep, replace) |
5482 | int from, from_byte, to, to_byte, encodep, replace; | |
4ed46869 | 5483 | struct coding_system *coding; |
4ed46869 | 5484 | { |
fb88bf2d | 5485 | int len = to - from, len_byte = to_byte - from_byte; |
72d1a715 | 5486 | int nchars_del = 0, nbytes_del = 0; |
fb88bf2d | 5487 | int require, inserted, inserted_byte; |
4b39528c | 5488 | int head_skip, tail_skip, total_skip = 0; |
84d60297 | 5489 | Lisp_Object saved_coding_symbol; |
fb88bf2d | 5490 | int first = 1; |
fb88bf2d | 5491 | unsigned char *src, *dst; |
84d60297 | 5492 | Lisp_Object deletion; |
e133c8fa | 5493 | int orig_point = PT, orig_len = len; |
6abb9bd9 | 5494 | int prev_Z; |
b73bfc1c KH |
5495 | int multibyte_p = !NILP (current_buffer->enable_multibyte_characters); |
5496 | ||
84d60297 | 5497 | deletion = Qnil; |
8844fa83 | 5498 | saved_coding_symbol = coding->symbol; |
d46c5b12 | 5499 | |
83fa074f | 5500 | if (from < PT && PT < to) |
e133c8fa KH |
5501 | { |
5502 | TEMP_SET_PT_BOTH (from, from_byte); | |
5503 | orig_point = from; | |
5504 | } | |
83fa074f | 5505 | |
6e44253b | 5506 | if (replace) |
d46c5b12 | 5507 | { |
fb88bf2d | 5508 | int saved_from = from; |
e077cc80 | 5509 | int saved_inhibit_modification_hooks; |
fb88bf2d | 5510 | |
d46c5b12 | 5511 | prepare_to_modify_buffer (from, to, &from); |
fb88bf2d KH |
5512 | if (saved_from != from) |
5513 | { | |
5514 | to = from + len; | |
b73bfc1c | 5515 | from_byte = CHAR_TO_BYTE (from), to_byte = CHAR_TO_BYTE (to); |
fb88bf2d KH |
5516 | len_byte = to_byte - from_byte; |
5517 | } | |
e077cc80 KH |
5518 | |
5519 | /* The code conversion routine can not preserve text properties | |
5520 | for now. So, we must remove all text properties in the | |
5521 | region. Here, we must suppress all modification hooks. */ | |
5522 | saved_inhibit_modification_hooks = inhibit_modification_hooks; | |
5523 | inhibit_modification_hooks = 1; | |
5524 | Fset_text_properties (make_number (from), make_number (to), Qnil, Qnil); | |
5525 | inhibit_modification_hooks = saved_inhibit_modification_hooks; | |
d46c5b12 | 5526 | } |
d46c5b12 KH |
5527 | |
5528 | if (! encodep && CODING_REQUIRE_DETECTION (coding)) | |
5529 | { | |
12410ef1 | 5530 | /* We must detect encoding of text and eol format. */ |
d46c5b12 KH |
5531 | |
5532 | if (from < GPT && to > GPT) | |
5533 | move_gap_both (from, from_byte); | |
5534 | if (coding->type == coding_type_undecided) | |
5535 | { | |
fb88bf2d | 5536 | detect_coding (coding, BYTE_POS_ADDR (from_byte), len_byte); |
d46c5b12 | 5537 | if (coding->type == coding_type_undecided) |
62b3ef1d KH |
5538 | { |
5539 | /* It seems that the text contains only ASCII, but we | |
d9aef30f | 5540 | should not leave it undecided because the deeper |
62b3ef1d KH |
5541 | decoding routine (decode_coding) tries to detect the |
5542 | encodings again in vain. */ | |
5543 | coding->type = coding_type_emacs_mule; | |
5544 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
d280ccb6 KH |
5545 | /* As emacs-mule decoder will handle composition, we |
5546 | need this setting to allocate coding->cmp_data | |
5547 | later. */ | |
5548 | coding->composing = COMPOSITION_NO; | |
62b3ef1d | 5549 | } |
d46c5b12 | 5550 | } |
aaaf0b1e KH |
5551 | if (coding->eol_type == CODING_EOL_UNDECIDED |
5552 | && coding->type != coding_type_ccl) | |
d46c5b12 | 5553 | { |
d46c5b12 KH |
5554 | detect_eol (coding, BYTE_POS_ADDR (from_byte), len_byte); |
5555 | if (coding->eol_type == CODING_EOL_UNDECIDED) | |
5556 | coding->eol_type = CODING_EOL_LF; | |
5557 | /* We had better recover the original eol format if we | |
8ca3766a | 5558 | encounter an inconsistent eol format while decoding. */ |
d46c5b12 KH |
5559 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
5560 | } | |
5561 | } | |
5562 | ||
d46c5b12 KH |
5563 | /* Now we convert the text. */ |
5564 | ||
5565 | /* For encoding, we must process pre-write-conversion in advance. */ | |
b73bfc1c KH |
5566 | if (! inhibit_pre_post_conversion |
5567 | && encodep | |
d46c5b12 KH |
5568 | && SYMBOLP (coding->pre_write_conversion) |
5569 | && ! NILP (Ffboundp (coding->pre_write_conversion))) | |
5570 | { | |
2b4f9037 KH |
5571 | /* The function in pre-write-conversion may put a new text in a |
5572 | new buffer. */ | |
0007bdd0 KH |
5573 | struct buffer *prev = current_buffer; |
5574 | Lisp_Object new; | |
d46c5b12 | 5575 | |
1c7457e2 | 5576 | record_unwind_protect (code_convert_region_unwind, |
24a948a7 | 5577 | Vlast_coding_system_used); |
b843d1ae KH |
5578 | /* We should not call any more pre-write/post-read-conversion |
5579 | functions while this pre-write-conversion is running. */ | |
5580 | inhibit_pre_post_conversion = 1; | |
b39f748c AS |
5581 | call2 (coding->pre_write_conversion, |
5582 | make_number (from), make_number (to)); | |
b843d1ae KH |
5583 | inhibit_pre_post_conversion = 0; |
5584 | /* Discard the unwind protect. */ | |
5585 | specpdl_ptr--; | |
5586 | ||
d46c5b12 KH |
5587 | if (current_buffer != prev) |
5588 | { | |
5589 | len = ZV - BEGV; | |
0007bdd0 | 5590 | new = Fcurrent_buffer (); |
d46c5b12 | 5591 | set_buffer_internal_1 (prev); |
7dae4502 | 5592 | del_range_2 (from, from_byte, to, to_byte, 0); |
e133c8fa | 5593 | TEMP_SET_PT_BOTH (from, from_byte); |
0007bdd0 KH |
5594 | insert_from_buffer (XBUFFER (new), 1, len, 0); |
5595 | Fkill_buffer (new); | |
e133c8fa KH |
5596 | if (orig_point >= to) |
5597 | orig_point += len - orig_len; | |
5598 | else if (orig_point > from) | |
5599 | orig_point = from; | |
5600 | orig_len = len; | |
d46c5b12 | 5601 | to = from + len; |
b73bfc1c KH |
5602 | from_byte = CHAR_TO_BYTE (from); |
5603 | to_byte = CHAR_TO_BYTE (to); | |
d46c5b12 | 5604 | len_byte = to_byte - from_byte; |
e133c8fa | 5605 | TEMP_SET_PT_BOTH (from, from_byte); |
d46c5b12 KH |
5606 | } |
5607 | } | |
5608 | ||
12410ef1 | 5609 | if (replace) |
72d1a715 RS |
5610 | { |
5611 | if (! EQ (current_buffer->undo_list, Qt)) | |
5612 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); | |
5613 | else | |
5614 | { | |
5615 | nchars_del = to - from; | |
5616 | nbytes_del = to_byte - from_byte; | |
5617 | } | |
5618 | } | |
12410ef1 | 5619 | |
ec6d2bb8 KH |
5620 | if (coding->composing != COMPOSITION_DISABLED) |
5621 | { | |
5622 | if (encodep) | |
5623 | coding_save_composition (coding, from, to, Fcurrent_buffer ()); | |
5624 | else | |
5625 | coding_allocate_composition_data (coding, from); | |
5626 | } | |
fb88bf2d | 5627 | |
b73bfc1c | 5628 | /* Try to skip the heading and tailing ASCIIs. */ |
4956c225 KH |
5629 | if (coding->type != coding_type_ccl) |
5630 | { | |
5631 | int from_byte_orig = from_byte, to_byte_orig = to_byte; | |
ec6d2bb8 | 5632 | |
4956c225 KH |
5633 | if (from < GPT && GPT < to) |
5634 | move_gap_both (from, from_byte); | |
5635 | SHRINK_CONVERSION_REGION (&from_byte, &to_byte, coding, NULL, encodep); | |
5636 | if (from_byte == to_byte | |
5637 | && (encodep || NILP (coding->post_read_conversion)) | |
5638 | && ! CODING_REQUIRE_FLUSHING (coding)) | |
5639 | { | |
5640 | coding->produced = len_byte; | |
5641 | coding->produced_char = len; | |
5642 | if (!replace) | |
5643 | /* We must record and adjust for this new text now. */ | |
5644 | adjust_after_insert (from, from_byte_orig, to, to_byte_orig, len); | |
5645 | return 0; | |
5646 | } | |
5647 | ||
5648 | head_skip = from_byte - from_byte_orig; | |
5649 | tail_skip = to_byte_orig - to_byte; | |
5650 | total_skip = head_skip + tail_skip; | |
5651 | from += head_skip; | |
5652 | to -= tail_skip; | |
5653 | len -= total_skip; len_byte -= total_skip; | |
5654 | } | |
d46c5b12 | 5655 | |
8ca3766a | 5656 | /* For conversion, we must put the gap before the text in addition to |
fb88bf2d KH |
5657 | making the gap larger for efficient decoding. The required gap |
5658 | size starts from 2000 which is the magic number used in make_gap. | |
5659 | But, after one batch of conversion, it will be incremented if we | |
5660 | find that it is not enough . */ | |
d46c5b12 KH |
5661 | require = 2000; |
5662 | ||
5663 | if (GAP_SIZE < require) | |
5664 | make_gap (require - GAP_SIZE); | |
5665 | move_gap_both (from, from_byte); | |
5666 | ||
d46c5b12 | 5667 | inserted = inserted_byte = 0; |
fb88bf2d KH |
5668 | |
5669 | GAP_SIZE += len_byte; | |
5670 | ZV -= len; | |
5671 | Z -= len; | |
5672 | ZV_BYTE -= len_byte; | |
5673 | Z_BYTE -= len_byte; | |
5674 | ||
d9f9a1bc GM |
5675 | if (GPT - BEG < BEG_UNCHANGED) |
5676 | BEG_UNCHANGED = GPT - BEG; | |
5677 | if (Z - GPT < END_UNCHANGED) | |
5678 | END_UNCHANGED = Z - GPT; | |
f2558efd | 5679 | |
b73bfc1c KH |
5680 | if (!encodep && coding->src_multibyte) |
5681 | { | |
5682 | /* Decoding routines expects that the source text is unibyte. | |
5683 | We must convert 8-bit characters of multibyte form to | |
5684 | unibyte. */ | |
5685 | int len_byte_orig = len_byte; | |
5686 | len_byte = str_as_unibyte (GAP_END_ADDR - len_byte, len_byte); | |
5687 | if (len_byte < len_byte_orig) | |
5688 | safe_bcopy (GAP_END_ADDR - len_byte_orig, GAP_END_ADDR - len_byte, | |
5689 | len_byte); | |
5690 | coding->src_multibyte = 0; | |
5691 | } | |
5692 | ||
d46c5b12 KH |
5693 | for (;;) |
5694 | { | |
fb88bf2d | 5695 | int result; |
d46c5b12 | 5696 | |
ec6d2bb8 | 5697 | /* The buffer memory is now: |
b73bfc1c KH |
5698 | +--------+converted-text+---------+-------original-text-------+---+ |
5699 | |<-from->|<--inserted-->|---------|<--------len_byte--------->|---| | |
5700 | |<---------------------- GAP ----------------------->| */ | |
ec6d2bb8 KH |
5701 | src = GAP_END_ADDR - len_byte; |
5702 | dst = GPT_ADDR + inserted_byte; | |
5703 | ||
d46c5b12 | 5704 | if (encodep) |
fb88bf2d | 5705 | result = encode_coding (coding, src, dst, len_byte, 0); |
d46c5b12 | 5706 | else |
0e79d667 RS |
5707 | { |
5708 | if (coding->composing != COMPOSITION_DISABLED) | |
5709 | coding->cmp_data->char_offset = from + inserted; | |
5710 | result = decode_coding (coding, src, dst, len_byte, 0); | |
5711 | } | |
ec6d2bb8 KH |
5712 | |
5713 | /* The buffer memory is now: | |
b73bfc1c KH |
5714 | +--------+-------converted-text----+--+------original-text----+---+ |
5715 | |<-from->|<-inserted->|<-produced->|--|<-(len_byte-consumed)->|---| | |
5716 | |<---------------------- GAP ----------------------->| */ | |
ec6d2bb8 | 5717 | |
d46c5b12 KH |
5718 | inserted += coding->produced_char; |
5719 | inserted_byte += coding->produced; | |
d46c5b12 | 5720 | len_byte -= coding->consumed; |
ec6d2bb8 KH |
5721 | |
5722 | if (result == CODING_FINISH_INSUFFICIENT_CMP) | |
5723 | { | |
5724 | coding_allocate_composition_data (coding, from + inserted); | |
5725 | continue; | |
5726 | } | |
5727 | ||
fb88bf2d | 5728 | src += coding->consumed; |
3636f7a3 | 5729 | dst += coding->produced; |
d46c5b12 | 5730 | |
9864ebce KH |
5731 | if (result == CODING_FINISH_NORMAL) |
5732 | { | |
5733 | src += len_byte; | |
5734 | break; | |
5735 | } | |
d46c5b12 KH |
5736 | if (! encodep && result == CODING_FINISH_INCONSISTENT_EOL) |
5737 | { | |
fb88bf2d | 5738 | unsigned char *pend = dst, *p = pend - inserted_byte; |
38edf7d4 | 5739 | Lisp_Object eol_type; |
d46c5b12 KH |
5740 | |
5741 | /* Encode LFs back to the original eol format (CR or CRLF). */ | |
5742 | if (coding->eol_type == CODING_EOL_CR) | |
5743 | { | |
5744 | while (p < pend) if (*p++ == '\n') p[-1] = '\r'; | |
5745 | } | |
5746 | else | |
5747 | { | |
d46c5b12 KH |
5748 | int count = 0; |
5749 | ||
fb88bf2d KH |
5750 | while (p < pend) if (*p++ == '\n') count++; |
5751 | if (src - dst < count) | |
d46c5b12 | 5752 | { |
38edf7d4 | 5753 | /* We don't have sufficient room for encoding LFs |
fb88bf2d KH |
5754 | back to CRLF. We must record converted and |
5755 | not-yet-converted text back to the buffer | |
5756 | content, enlarge the gap, then record them out of | |
5757 | the buffer contents again. */ | |
5758 | int add = len_byte + inserted_byte; | |
5759 | ||
5760 | GAP_SIZE -= add; | |
5761 | ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
5762 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5763 | make_gap (count - GAP_SIZE); | |
5764 | GAP_SIZE += add; | |
5765 | ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
5766 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
5767 | /* Don't forget to update SRC, DST, and PEND. */ | |
5768 | src = GAP_END_ADDR - len_byte; | |
5769 | dst = GPT_ADDR + inserted_byte; | |
5770 | pend = dst; | |
d46c5b12 | 5771 | } |
d46c5b12 KH |
5772 | inserted += count; |
5773 | inserted_byte += count; | |
fb88bf2d KH |
5774 | coding->produced += count; |
5775 | p = dst = pend + count; | |
5776 | while (count) | |
5777 | { | |
5778 | *--p = *--pend; | |
5779 | if (*p == '\n') count--, *--p = '\r'; | |
5780 | } | |
d46c5b12 KH |
5781 | } |
5782 | ||
5783 | /* Suppress eol-format conversion in the further conversion. */ | |
5784 | coding->eol_type = CODING_EOL_LF; | |
5785 | ||
38edf7d4 KH |
5786 | /* Set the coding system symbol to that for Unix-like EOL. */ |
5787 | eol_type = Fget (saved_coding_symbol, Qeol_type); | |
5788 | if (VECTORP (eol_type) | |
5789 | && XVECTOR (eol_type)->size == 3 | |
5790 | && SYMBOLP (XVECTOR (eol_type)->contents[CODING_EOL_LF])) | |
5791 | coding->symbol = XVECTOR (eol_type)->contents[CODING_EOL_LF]; | |
5792 | else | |
5793 | coding->symbol = saved_coding_symbol; | |
93dec019 | 5794 | |
fb88bf2d | 5795 | continue; |
d46c5b12 KH |
5796 | } |
5797 | if (len_byte <= 0) | |
944bd420 KH |
5798 | { |
5799 | if (coding->type != coding_type_ccl | |
5800 | || coding->mode & CODING_MODE_LAST_BLOCK) | |
5801 | break; | |
5802 | coding->mode |= CODING_MODE_LAST_BLOCK; | |
5803 | continue; | |
5804 | } | |
d46c5b12 KH |
5805 | if (result == CODING_FINISH_INSUFFICIENT_SRC) |
5806 | { | |
5807 | /* The source text ends in invalid codes. Let's just | |
5808 | make them valid buffer contents, and finish conversion. */ | |
70ad9fc4 GM |
5809 | if (multibyte_p) |
5810 | { | |
5811 | unsigned char *start = dst; | |
93dec019 | 5812 | |
70ad9fc4 GM |
5813 | inserted += len_byte; |
5814 | while (len_byte--) | |
5815 | { | |
5816 | int c = *src++; | |
5817 | dst += CHAR_STRING (c, dst); | |
5818 | } | |
5819 | ||
5820 | inserted_byte += dst - start; | |
5821 | } | |
5822 | else | |
5823 | { | |
5824 | inserted += len_byte; | |
5825 | inserted_byte += len_byte; | |
5826 | while (len_byte--) | |
5827 | *dst++ = *src++; | |
5828 | } | |
d46c5b12 KH |
5829 | break; |
5830 | } | |
9864ebce KH |
5831 | if (result == CODING_FINISH_INTERRUPT) |
5832 | { | |
5833 | /* The conversion procedure was interrupted by a user. */ | |
9864ebce KH |
5834 | break; |
5835 | } | |
5836 | /* Now RESULT == CODING_FINISH_INSUFFICIENT_DST */ | |
5837 | if (coding->consumed < 1) | |
5838 | { | |
5839 | /* It's quite strange to require more memory without | |
5840 | consuming any bytes. Perhaps CCL program bug. */ | |
9864ebce KH |
5841 | break; |
5842 | } | |
fb88bf2d KH |
5843 | if (first) |
5844 | { | |
5845 | /* We have just done the first batch of conversion which was | |
8ca3766a | 5846 | stopped because of insufficient gap. Let's reconsider the |
fb88bf2d KH |
5847 | required gap size (i.e. SRT - DST) now. |
5848 | ||
5849 | We have converted ORIG bytes (== coding->consumed) into | |
5850 | NEW bytes (coding->produced). To convert the remaining | |
5851 | LEN bytes, we may need REQUIRE bytes of gap, where: | |
5852 | REQUIRE + LEN_BYTE = LEN_BYTE * (NEW / ORIG) | |
5853 | REQUIRE = LEN_BYTE * (NEW - ORIG) / ORIG | |
5854 | Here, we are sure that NEW >= ORIG. */ | |
b3385c28 KH |
5855 | float ratio; |
5856 | ||
5857 | if (coding->produced <= coding->consumed) | |
5858 | { | |
5859 | /* This happens because of CCL-based coding system with | |
5860 | eol-type CRLF. */ | |
5861 | require = 0; | |
5862 | } | |
5863 | else | |
5864 | { | |
5865 | ratio = (coding->produced - coding->consumed) / coding->consumed; | |
5866 | require = len_byte * ratio; | |
5867 | } | |
fb88bf2d KH |
5868 | first = 0; |
5869 | } | |
5870 | if ((src - dst) < (require + 2000)) | |
5871 | { | |
5872 | /* See the comment above the previous call of make_gap. */ | |
5873 | int add = len_byte + inserted_byte; | |
5874 | ||
5875 | GAP_SIZE -= add; | |
5876 | ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
5877 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5878 | make_gap (require + 2000); | |
5879 | GAP_SIZE += add; | |
5880 | ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
5881 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
fb88bf2d | 5882 | } |
d46c5b12 | 5883 | } |
fb88bf2d KH |
5884 | if (src - dst > 0) *dst = 0; /* Put an anchor. */ |
5885 | ||
b73bfc1c KH |
5886 | if (encodep && coding->dst_multibyte) |
5887 | { | |
5888 | /* The output is unibyte. We must convert 8-bit characters to | |
5889 | multibyte form. */ | |
5890 | if (inserted_byte * 2 > GAP_SIZE) | |
5891 | { | |
5892 | GAP_SIZE -= inserted_byte; | |
5893 | ZV += inserted_byte; Z += inserted_byte; | |
5894 | ZV_BYTE += inserted_byte; Z_BYTE += inserted_byte; | |
5895 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5896 | make_gap (inserted_byte - GAP_SIZE); | |
5897 | GAP_SIZE += inserted_byte; | |
5898 | ZV -= inserted_byte; Z -= inserted_byte; | |
5899 | ZV_BYTE -= inserted_byte; Z_BYTE -= inserted_byte; | |
5900 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
5901 | } | |
5902 | inserted_byte = str_to_multibyte (GPT_ADDR, GAP_SIZE, inserted_byte); | |
5903 | } | |
7553d0e1 | 5904 | |
93dec019 | 5905 | /* If we shrank the conversion area, adjust it now. */ |
12410ef1 KH |
5906 | if (total_skip > 0) |
5907 | { | |
5908 | if (tail_skip > 0) | |
5909 | safe_bcopy (GAP_END_ADDR, GPT_ADDR + inserted_byte, tail_skip); | |
5910 | inserted += total_skip; inserted_byte += total_skip; | |
5911 | GAP_SIZE += total_skip; | |
5912 | GPT -= head_skip; GPT_BYTE -= head_skip; | |
5913 | ZV -= total_skip; ZV_BYTE -= total_skip; | |
5914 | Z -= total_skip; Z_BYTE -= total_skip; | |
5915 | from -= head_skip; from_byte -= head_skip; | |
5916 | to += tail_skip; to_byte += tail_skip; | |
5917 | } | |
5918 | ||
6abb9bd9 | 5919 | prev_Z = Z; |
72d1a715 RS |
5920 | if (! EQ (current_buffer->undo_list, Qt)) |
5921 | adjust_after_replace (from, from_byte, deletion, inserted, inserted_byte); | |
5922 | else | |
5923 | adjust_after_replace_noundo (from, from_byte, nchars_del, nbytes_del, | |
5924 | inserted, inserted_byte); | |
6abb9bd9 | 5925 | inserted = Z - prev_Z; |
4ed46869 | 5926 | |
ec6d2bb8 KH |
5927 | if (!encodep && coding->cmp_data && coding->cmp_data->used) |
5928 | coding_restore_composition (coding, Fcurrent_buffer ()); | |
5929 | coding_free_composition_data (coding); | |
5930 | ||
b73bfc1c KH |
5931 | if (! inhibit_pre_post_conversion |
5932 | && ! encodep && ! NILP (coding->post_read_conversion)) | |
d46c5b12 | 5933 | { |
2b4f9037 | 5934 | Lisp_Object val; |
1c7457e2 | 5935 | Lisp_Object saved_coding_system; |
4ed46869 | 5936 | |
e133c8fa KH |
5937 | if (from != PT) |
5938 | TEMP_SET_PT_BOTH (from, from_byte); | |
6abb9bd9 | 5939 | prev_Z = Z; |
1c7457e2 KH |
5940 | record_unwind_protect (code_convert_region_unwind, |
5941 | Vlast_coding_system_used); | |
5942 | saved_coding_system = Vlast_coding_system_used; | |
5943 | Vlast_coding_system_used = coding->symbol; | |
b843d1ae KH |
5944 | /* We should not call any more pre-write/post-read-conversion |
5945 | functions while this post-read-conversion is running. */ | |
5946 | inhibit_pre_post_conversion = 1; | |
2b4f9037 | 5947 | val = call1 (coding->post_read_conversion, make_number (inserted)); |
b843d1ae | 5948 | inhibit_pre_post_conversion = 0; |
1c7457e2 KH |
5949 | coding->symbol = Vlast_coding_system_used; |
5950 | Vlast_coding_system_used = saved_coding_system; | |
b843d1ae KH |
5951 | /* Discard the unwind protect. */ |
5952 | specpdl_ptr--; | |
b7826503 | 5953 | CHECK_NUMBER (val); |
944bd420 | 5954 | inserted += Z - prev_Z; |
e133c8fa KH |
5955 | } |
5956 | ||
5957 | if (orig_point >= from) | |
5958 | { | |
5959 | if (orig_point >= from + orig_len) | |
5960 | orig_point += inserted - orig_len; | |
5961 | else | |
5962 | orig_point = from; | |
5963 | TEMP_SET_PT (orig_point); | |
d46c5b12 | 5964 | } |
4ed46869 | 5965 | |
ec6d2bb8 KH |
5966 | if (replace) |
5967 | { | |
5968 | signal_after_change (from, to - from, inserted); | |
e19539f1 | 5969 | update_compositions (from, from + inserted, CHECK_BORDER); |
ec6d2bb8 | 5970 | } |
2b4f9037 | 5971 | |
fb88bf2d | 5972 | { |
12410ef1 KH |
5973 | coding->consumed = to_byte - from_byte; |
5974 | coding->consumed_char = to - from; | |
5975 | coding->produced = inserted_byte; | |
5976 | coding->produced_char = inserted; | |
fb88bf2d | 5977 | } |
7553d0e1 | 5978 | |
fb88bf2d | 5979 | return 0; |
d46c5b12 KH |
5980 | } |
5981 | ||
5982 | Lisp_Object | |
b73bfc1c KH |
5983 | run_pre_post_conversion_on_str (str, coding, encodep) |
5984 | Lisp_Object str; | |
5985 | struct coding_system *coding; | |
5986 | int encodep; | |
5987 | { | |
aed13378 | 5988 | int count = SPECPDL_INDEX (); |
cf3b32fc | 5989 | struct gcpro gcpro1, gcpro2; |
b73bfc1c | 5990 | int multibyte = STRING_MULTIBYTE (str); |
3fd9494b RS |
5991 | Lisp_Object buffer; |
5992 | struct buffer *buf; | |
cf3b32fc | 5993 | Lisp_Object old_deactivate_mark; |
b73bfc1c KH |
5994 | |
5995 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
1c7457e2 KH |
5996 | record_unwind_protect (code_convert_region_unwind, |
5997 | Vlast_coding_system_used); | |
cf3b32fc RS |
5998 | /* It is not crucial to specbind this. */ |
5999 | old_deactivate_mark = Vdeactivate_mark; | |
6000 | GCPRO2 (str, old_deactivate_mark); | |
3fd9494b RS |
6001 | |
6002 | buffer = Fget_buffer_create (build_string (" *code-converting-work*")); | |
6003 | buf = XBUFFER (buffer); | |
6004 | ||
6ed0af67 | 6005 | delete_all_overlays (buf); |
3fd9494b RS |
6006 | buf->directory = current_buffer->directory; |
6007 | buf->read_only = Qnil; | |
6008 | buf->filename = Qnil; | |
6009 | buf->undo_list = Qt; | |
6ed0af67 SM |
6010 | eassert (buf->overlays_before == NULL); |
6011 | eassert (buf->overlays_after == NULL); | |
3fd9494b RS |
6012 | |
6013 | set_buffer_internal (buf); | |
b73bfc1c KH |
6014 | /* We must insert the contents of STR as is without |
6015 | unibyte<->multibyte conversion. For that, we adjust the | |
6016 | multibyteness of the working buffer to that of STR. */ | |
6017 | Ferase_buffer (); | |
3fd9494b RS |
6018 | buf->enable_multibyte_characters = multibyte ? Qt : Qnil; |
6019 | ||
b73bfc1c | 6020 | insert_from_string (str, 0, 0, |
d5db4077 | 6021 | SCHARS (str), SBYTES (str), 0); |
b73bfc1c KH |
6022 | UNGCPRO; |
6023 | inhibit_pre_post_conversion = 1; | |
6024 | if (encodep) | |
6025 | call2 (coding->pre_write_conversion, make_number (BEG), make_number (Z)); | |
6026 | else | |
6bac5b12 | 6027 | { |
1c7457e2 | 6028 | Vlast_coding_system_used = coding->symbol; |
6bac5b12 KH |
6029 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
6030 | call1 (coding->post_read_conversion, make_number (Z - BEG)); | |
1c7457e2 | 6031 | coding->symbol = Vlast_coding_system_used; |
6bac5b12 | 6032 | } |
b73bfc1c | 6033 | inhibit_pre_post_conversion = 0; |
cf3b32fc | 6034 | Vdeactivate_mark = old_deactivate_mark; |
78108bcd | 6035 | str = make_buffer_string (BEG, Z, 1); |
b73bfc1c KH |
6036 | return unbind_to (count, str); |
6037 | } | |
6038 | ||
6039 | Lisp_Object | |
6040 | decode_coding_string (str, coding, nocopy) | |
d46c5b12 | 6041 | Lisp_Object str; |
4ed46869 | 6042 | struct coding_system *coding; |
b73bfc1c | 6043 | int nocopy; |
4ed46869 | 6044 | { |
d46c5b12 | 6045 | int len; |
73be902c | 6046 | struct conversion_buffer buf; |
da55a2b7 | 6047 | int from, to_byte; |
84d60297 | 6048 | Lisp_Object saved_coding_symbol; |
d46c5b12 | 6049 | int result; |
78108bcd | 6050 | int require_decoding; |
73be902c KH |
6051 | int shrinked_bytes = 0; |
6052 | Lisp_Object newstr; | |
2391eaa4 | 6053 | int consumed, consumed_char, produced, produced_char; |
4ed46869 | 6054 | |
b73bfc1c | 6055 | from = 0; |
d5db4077 | 6056 | to_byte = SBYTES (str); |
4ed46869 | 6057 | |
8844fa83 | 6058 | saved_coding_symbol = coding->symbol; |
764ca8da KH |
6059 | coding->src_multibyte = STRING_MULTIBYTE (str); |
6060 | coding->dst_multibyte = 1; | |
b73bfc1c | 6061 | if (CODING_REQUIRE_DETECTION (coding)) |
d46c5b12 KH |
6062 | { |
6063 | /* See the comments in code_convert_region. */ | |
6064 | if (coding->type == coding_type_undecided) | |
6065 | { | |
d5db4077 | 6066 | detect_coding (coding, SDATA (str), to_byte); |
d46c5b12 | 6067 | if (coding->type == coding_type_undecided) |
d280ccb6 KH |
6068 | { |
6069 | coding->type = coding_type_emacs_mule; | |
6070 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
6071 | /* As emacs-mule decoder will handle composition, we | |
6072 | need this setting to allocate coding->cmp_data | |
6073 | later. */ | |
6074 | coding->composing = COMPOSITION_NO; | |
6075 | } | |
d46c5b12 | 6076 | } |
aaaf0b1e KH |
6077 | if (coding->eol_type == CODING_EOL_UNDECIDED |
6078 | && coding->type != coding_type_ccl) | |
d46c5b12 KH |
6079 | { |
6080 | saved_coding_symbol = coding->symbol; | |
d5db4077 | 6081 | detect_eol (coding, SDATA (str), to_byte); |
d46c5b12 KH |
6082 | if (coding->eol_type == CODING_EOL_UNDECIDED) |
6083 | coding->eol_type = CODING_EOL_LF; | |
6084 | /* We had better recover the original eol format if we | |
8ca3766a | 6085 | encounter an inconsistent eol format while decoding. */ |
d46c5b12 KH |
6086 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
6087 | } | |
6088 | } | |
4ed46869 | 6089 | |
764ca8da KH |
6090 | if (coding->type == coding_type_no_conversion |
6091 | || coding->type == coding_type_raw_text) | |
6092 | coding->dst_multibyte = 0; | |
6093 | ||
78108bcd | 6094 | require_decoding = CODING_REQUIRE_DECODING (coding); |
ec6d2bb8 | 6095 | |
b73bfc1c | 6096 | if (STRING_MULTIBYTE (str)) |
d46c5b12 | 6097 | { |
b73bfc1c KH |
6098 | /* Decoding routines expect the source text to be unibyte. */ |
6099 | str = Fstring_as_unibyte (str); | |
d5db4077 | 6100 | to_byte = SBYTES (str); |
b73bfc1c | 6101 | nocopy = 1; |
764ca8da | 6102 | coding->src_multibyte = 0; |
b73bfc1c | 6103 | } |
ec6d2bb8 | 6104 | |
b73bfc1c | 6105 | /* Try to skip the heading and tailing ASCIIs. */ |
78108bcd | 6106 | if (require_decoding && coding->type != coding_type_ccl) |
4956c225 | 6107 | { |
d5db4077 | 6108 | SHRINK_CONVERSION_REGION (&from, &to_byte, coding, SDATA (str), |
4956c225 KH |
6109 | 0); |
6110 | if (from == to_byte) | |
78108bcd | 6111 | require_decoding = 0; |
d5db4077 | 6112 | shrinked_bytes = from + (SBYTES (str) - to_byte); |
4956c225 | 6113 | } |
b73bfc1c | 6114 | |
439ad9ea KH |
6115 | if (!require_decoding |
6116 | && !(SYMBOLP (coding->post_read_conversion) | |
6117 | && !NILP (Ffboundp (coding->post_read_conversion)))) | |
78108bcd | 6118 | { |
d5db4077 KR |
6119 | coding->consumed = SBYTES (str); |
6120 | coding->consumed_char = SCHARS (str); | |
78108bcd KH |
6121 | if (coding->dst_multibyte) |
6122 | { | |
6123 | str = Fstring_as_multibyte (str); | |
6124 | nocopy = 1; | |
6125 | } | |
d5db4077 KR |
6126 | coding->produced = SBYTES (str); |
6127 | coding->produced_char = SCHARS (str); | |
78108bcd KH |
6128 | return (nocopy ? str : Fcopy_sequence (str)); |
6129 | } | |
6130 | ||
6131 | if (coding->composing != COMPOSITION_DISABLED) | |
6132 | coding_allocate_composition_data (coding, from); | |
b73bfc1c | 6133 | len = decoding_buffer_size (coding, to_byte - from); |
73be902c | 6134 | allocate_conversion_buffer (buf, len); |
4ed46869 | 6135 | |
2391eaa4 | 6136 | consumed = consumed_char = produced = produced_char = 0; |
73be902c | 6137 | while (1) |
4ed46869 | 6138 | { |
d5db4077 | 6139 | result = decode_coding (coding, SDATA (str) + from + consumed, |
73be902c KH |
6140 | buf.data + produced, to_byte - from - consumed, |
6141 | buf.size - produced); | |
6142 | consumed += coding->consumed; | |
2391eaa4 | 6143 | consumed_char += coding->consumed_char; |
73be902c KH |
6144 | produced += coding->produced; |
6145 | produced_char += coding->produced_char; | |
2391eaa4 KH |
6146 | if (result == CODING_FINISH_NORMAL |
6147 | || (result == CODING_FINISH_INSUFFICIENT_SRC | |
6148 | && coding->consumed == 0)) | |
73be902c KH |
6149 | break; |
6150 | if (result == CODING_FINISH_INSUFFICIENT_CMP) | |
6151 | coding_allocate_composition_data (coding, from + produced_char); | |
6152 | else if (result == CODING_FINISH_INSUFFICIENT_DST) | |
6153 | extend_conversion_buffer (&buf); | |
6154 | else if (result == CODING_FINISH_INCONSISTENT_EOL) | |
6155 | { | |
8844fa83 KH |
6156 | Lisp_Object eol_type; |
6157 | ||
73be902c KH |
6158 | /* Recover the original EOL format. */ |
6159 | if (coding->eol_type == CODING_EOL_CR) | |
6160 | { | |
6161 | unsigned char *p; | |
6162 | for (p = buf.data; p < buf.data + produced; p++) | |
6163 | if (*p == '\n') *p = '\r'; | |
6164 | } | |
6165 | else if (coding->eol_type == CODING_EOL_CRLF) | |
6166 | { | |
6167 | int num_eol = 0; | |
6168 | unsigned char *p0, *p1; | |
6169 | for (p0 = buf.data, p1 = p0 + produced; p0 < p1; p0++) | |
6170 | if (*p0 == '\n') num_eol++; | |
6171 | if (produced + num_eol >= buf.size) | |
6172 | extend_conversion_buffer (&buf); | |
6173 | for (p0 = buf.data + produced, p1 = p0 + num_eol; p0 > buf.data;) | |
6174 | { | |
6175 | *--p1 = *--p0; | |
6176 | if (*p0 == '\n') *--p1 = '\r'; | |
6177 | } | |
6178 | produced += num_eol; | |
6179 | produced_char += num_eol; | |
93dec019 | 6180 | } |
8844fa83 | 6181 | /* Suppress eol-format conversion in the further conversion. */ |
73be902c | 6182 | coding->eol_type = CODING_EOL_LF; |
8844fa83 KH |
6183 | |
6184 | /* Set the coding system symbol to that for Unix-like EOL. */ | |
6185 | eol_type = Fget (saved_coding_symbol, Qeol_type); | |
6186 | if (VECTORP (eol_type) | |
6187 | && XVECTOR (eol_type)->size == 3 | |
6188 | && SYMBOLP (XVECTOR (eol_type)->contents[CODING_EOL_LF])) | |
6189 | coding->symbol = XVECTOR (eol_type)->contents[CODING_EOL_LF]; | |
6190 | else | |
6191 | coding->symbol = saved_coding_symbol; | |
6192 | ||
6193 | ||
73be902c | 6194 | } |
4ed46869 | 6195 | } |
d46c5b12 | 6196 | |
2391eaa4 KH |
6197 | coding->consumed = consumed; |
6198 | coding->consumed_char = consumed_char; | |
6199 | coding->produced = produced; | |
6200 | coding->produced_char = produced_char; | |
6201 | ||
78108bcd | 6202 | if (coding->dst_multibyte) |
73be902c KH |
6203 | newstr = make_uninit_multibyte_string (produced_char + shrinked_bytes, |
6204 | produced + shrinked_bytes); | |
78108bcd | 6205 | else |
73be902c KH |
6206 | newstr = make_uninit_string (produced + shrinked_bytes); |
6207 | if (from > 0) | |
a4244313 KR |
6208 | STRING_COPYIN (newstr, 0, SDATA (str), from); |
6209 | STRING_COPYIN (newstr, from, buf.data, produced); | |
73be902c | 6210 | if (shrinked_bytes > from) |
a4244313 KR |
6211 | STRING_COPYIN (newstr, from + produced, |
6212 | SDATA (str) + to_byte, | |
6213 | shrinked_bytes - from); | |
73be902c | 6214 | free_conversion_buffer (&buf); |
b73bfc1c KH |
6215 | |
6216 | if (coding->cmp_data && coding->cmp_data->used) | |
73be902c | 6217 | coding_restore_composition (coding, newstr); |
b73bfc1c KH |
6218 | coding_free_composition_data (coding); |
6219 | ||
6220 | if (SYMBOLP (coding->post_read_conversion) | |
6221 | && !NILP (Ffboundp (coding->post_read_conversion))) | |
73be902c | 6222 | newstr = run_pre_post_conversion_on_str (newstr, coding, 0); |
b73bfc1c | 6223 | |
73be902c | 6224 | return newstr; |
b73bfc1c KH |
6225 | } |
6226 | ||
6227 | Lisp_Object | |
6228 | encode_coding_string (str, coding, nocopy) | |
6229 | Lisp_Object str; | |
6230 | struct coding_system *coding; | |
6231 | int nocopy; | |
6232 | { | |
6233 | int len; | |
73be902c | 6234 | struct conversion_buffer buf; |
b73bfc1c | 6235 | int from, to, to_byte; |
b73bfc1c | 6236 | int result; |
73be902c KH |
6237 | int shrinked_bytes = 0; |
6238 | Lisp_Object newstr; | |
2391eaa4 | 6239 | int consumed, consumed_char, produced, produced_char; |
b73bfc1c KH |
6240 | |
6241 | if (SYMBOLP (coding->pre_write_conversion) | |
6242 | && !NILP (Ffboundp (coding->pre_write_conversion))) | |
6bac5b12 | 6243 | str = run_pre_post_conversion_on_str (str, coding, 1); |
b73bfc1c KH |
6244 | |
6245 | from = 0; | |
d5db4077 KR |
6246 | to = SCHARS (str); |
6247 | to_byte = SBYTES (str); | |
b73bfc1c | 6248 | |
e2c06b17 KH |
6249 | /* Encoding routines determine the multibyteness of the source text |
6250 | by coding->src_multibyte. */ | |
6251 | coding->src_multibyte = STRING_MULTIBYTE (str); | |
6252 | coding->dst_multibyte = 0; | |
b73bfc1c | 6253 | if (! CODING_REQUIRE_ENCODING (coding)) |
826bfb8b | 6254 | { |
d5db4077 KR |
6255 | coding->consumed = SBYTES (str); |
6256 | coding->consumed_char = SCHARS (str); | |
b73bfc1c KH |
6257 | if (STRING_MULTIBYTE (str)) |
6258 | { | |
6259 | str = Fstring_as_unibyte (str); | |
6260 | nocopy = 1; | |
6261 | } | |
d5db4077 KR |
6262 | coding->produced = SBYTES (str); |
6263 | coding->produced_char = SCHARS (str); | |
b73bfc1c | 6264 | return (nocopy ? str : Fcopy_sequence (str)); |
826bfb8b KH |
6265 | } |
6266 | ||
b73bfc1c KH |
6267 | if (coding->composing != COMPOSITION_DISABLED) |
6268 | coding_save_composition (coding, from, to, str); | |
ec6d2bb8 | 6269 | |
b73bfc1c | 6270 | /* Try to skip the heading and tailing ASCIIs. */ |
4956c225 KH |
6271 | if (coding->type != coding_type_ccl) |
6272 | { | |
d5db4077 | 6273 | SHRINK_CONVERSION_REGION (&from, &to_byte, coding, SDATA (str), |
4956c225 KH |
6274 | 1); |
6275 | if (from == to_byte) | |
6276 | return (nocopy ? str : Fcopy_sequence (str)); | |
d5db4077 | 6277 | shrinked_bytes = from + (SBYTES (str) - to_byte); |
4956c225 | 6278 | } |
b73bfc1c KH |
6279 | |
6280 | len = encoding_buffer_size (coding, to_byte - from); | |
73be902c KH |
6281 | allocate_conversion_buffer (buf, len); |
6282 | ||
2391eaa4 | 6283 | consumed = consumed_char = produced = produced_char = 0; |
73be902c KH |
6284 | while (1) |
6285 | { | |
d5db4077 | 6286 | result = encode_coding (coding, SDATA (str) + from + consumed, |
73be902c KH |
6287 | buf.data + produced, to_byte - from - consumed, |
6288 | buf.size - produced); | |
6289 | consumed += coding->consumed; | |
2391eaa4 | 6290 | consumed_char += coding->consumed_char; |
13004bef | 6291 | produced += coding->produced; |
2391eaa4 KH |
6292 | produced_char += coding->produced_char; |
6293 | if (result == CODING_FINISH_NORMAL | |
6294 | || (result == CODING_FINISH_INSUFFICIENT_SRC | |
6295 | && coding->consumed == 0)) | |
73be902c KH |
6296 | break; |
6297 | /* Now result should be CODING_FINISH_INSUFFICIENT_DST. */ | |
6298 | extend_conversion_buffer (&buf); | |
6299 | } | |
6300 | ||
2391eaa4 KH |
6301 | coding->consumed = consumed; |
6302 | coding->consumed_char = consumed_char; | |
6303 | coding->produced = produced; | |
6304 | coding->produced_char = produced_char; | |
6305 | ||
73be902c | 6306 | newstr = make_uninit_string (produced + shrinked_bytes); |
b73bfc1c | 6307 | if (from > 0) |
a4244313 KR |
6308 | STRING_COPYIN (newstr, 0, SDATA (str), from); |
6309 | STRING_COPYIN (newstr, from, buf.data, produced); | |
73be902c | 6310 | if (shrinked_bytes > from) |
a4244313 KR |
6311 | STRING_COPYIN (newstr, from + produced, |
6312 | SDATA (str) + to_byte, | |
6313 | shrinked_bytes - from); | |
73be902c KH |
6314 | |
6315 | free_conversion_buffer (&buf); | |
ec6d2bb8 | 6316 | coding_free_composition_data (coding); |
b73bfc1c | 6317 | |
73be902c | 6318 | return newstr; |
4ed46869 KH |
6319 | } |
6320 | ||
6321 | \f | |
6322 | #ifdef emacs | |
1397dc18 | 6323 | /*** 8. Emacs Lisp library functions ***/ |
4ed46869 | 6324 | |
4ed46869 | 6325 | DEFUN ("coding-system-p", Fcoding_system_p, Scoding_system_p, 1, 1, 0, |
48b0f3ae PJ |
6326 | doc: /* Return t if OBJECT is nil or a coding-system. |
6327 | See the documentation of `make-coding-system' for information | |
6328 | about coding-system objects. */) | |
6329 | (obj) | |
4ed46869 KH |
6330 | Lisp_Object obj; |
6331 | { | |
4608c386 KH |
6332 | if (NILP (obj)) |
6333 | return Qt; | |
6334 | if (!SYMBOLP (obj)) | |
6335 | return Qnil; | |
c2164d91 KH |
6336 | if (! NILP (Fget (obj, Qcoding_system_define_form))) |
6337 | return Qt; | |
4608c386 KH |
6338 | /* Get coding-spec vector for OBJ. */ |
6339 | obj = Fget (obj, Qcoding_system); | |
6340 | return ((VECTORP (obj) && XVECTOR (obj)->size == 5) | |
6341 | ? Qt : Qnil); | |
4ed46869 KH |
6342 | } |
6343 | ||
9d991de8 RS |
6344 | DEFUN ("read-non-nil-coding-system", Fread_non_nil_coding_system, |
6345 | Sread_non_nil_coding_system, 1, 1, 0, | |
48b0f3ae PJ |
6346 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. */) |
6347 | (prompt) | |
4ed46869 KH |
6348 | Lisp_Object prompt; |
6349 | { | |
e0e989f6 | 6350 | Lisp_Object val; |
9d991de8 RS |
6351 | do |
6352 | { | |
4608c386 KH |
6353 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
6354 | Qt, Qnil, Qcoding_system_history, Qnil, Qnil); | |
9d991de8 | 6355 | } |
d5db4077 | 6356 | while (SCHARS (val) == 0); |
e0e989f6 | 6357 | return (Fintern (val, Qnil)); |
4ed46869 KH |
6358 | } |
6359 | ||
9b787f3e | 6360 | DEFUN ("read-coding-system", Fread_coding_system, Sread_coding_system, 1, 2, 0, |
48b0f3ae PJ |
6361 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. |
6362 | If the user enters null input, return second argument DEFAULT-CODING-SYSTEM. */) | |
6363 | (prompt, default_coding_system) | |
9b787f3e | 6364 | Lisp_Object prompt, default_coding_system; |
4ed46869 | 6365 | { |
f44d27ce | 6366 | Lisp_Object val; |
9b787f3e | 6367 | if (SYMBOLP (default_coding_system)) |
57d25e6f | 6368 | default_coding_system = SYMBOL_NAME (default_coding_system); |
4608c386 | 6369 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
9b787f3e RS |
6370 | Qt, Qnil, Qcoding_system_history, |
6371 | default_coding_system, Qnil); | |
d5db4077 | 6372 | return (SCHARS (val) == 0 ? Qnil : Fintern (val, Qnil)); |
4ed46869 KH |
6373 | } |
6374 | ||
6375 | DEFUN ("check-coding-system", Fcheck_coding_system, Scheck_coding_system, | |
6376 | 1, 1, 0, | |
48b0f3ae PJ |
6377 | doc: /* Check validity of CODING-SYSTEM. |
6378 | If valid, return CODING-SYSTEM, else signal a `coding-system-error' error. | |
6379 | It is valid if it is a symbol with a non-nil `coding-system' property. | |
6380 | The value of property should be a vector of length 5. */) | |
6381 | (coding_system) | |
4ed46869 KH |
6382 | Lisp_Object coding_system; |
6383 | { | |
a362520d KH |
6384 | Lisp_Object define_form; |
6385 | ||
6386 | define_form = Fget (coding_system, Qcoding_system_define_form); | |
6387 | if (! NILP (define_form)) | |
6388 | { | |
6389 | Fput (coding_system, Qcoding_system_define_form, Qnil); | |
6390 | safe_eval (define_form); | |
6391 | } | |
4ed46869 KH |
6392 | if (!NILP (Fcoding_system_p (coding_system))) |
6393 | return coding_system; | |
6394 | while (1) | |
02ba4723 | 6395 | Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil)); |
4ed46869 | 6396 | } |
3a73fa5d | 6397 | \f |
d46c5b12 | 6398 | Lisp_Object |
0a28aafb | 6399 | detect_coding_system (src, src_bytes, highest, multibytep) |
a4244313 | 6400 | const unsigned char *src; |
d46c5b12 | 6401 | int src_bytes, highest; |
0a28aafb | 6402 | int multibytep; |
4ed46869 KH |
6403 | { |
6404 | int coding_mask, eol_type; | |
d46c5b12 KH |
6405 | Lisp_Object val, tmp; |
6406 | int dummy; | |
4ed46869 | 6407 | |
0a28aafb | 6408 | coding_mask = detect_coding_mask (src, src_bytes, NULL, &dummy, multibytep); |
d46c5b12 KH |
6409 | eol_type = detect_eol_type (src, src_bytes, &dummy); |
6410 | if (eol_type == CODING_EOL_INCONSISTENT) | |
25b02698 | 6411 | eol_type = CODING_EOL_UNDECIDED; |
4ed46869 | 6412 | |
d46c5b12 | 6413 | if (!coding_mask) |
4ed46869 | 6414 | { |
27901516 | 6415 | val = Qundecided; |
d46c5b12 | 6416 | if (eol_type != CODING_EOL_UNDECIDED) |
4ed46869 | 6417 | { |
f44d27ce RS |
6418 | Lisp_Object val2; |
6419 | val2 = Fget (Qundecided, Qeol_type); | |
4ed46869 KH |
6420 | if (VECTORP (val2)) |
6421 | val = XVECTOR (val2)->contents[eol_type]; | |
6422 | } | |
80e803b4 | 6423 | return (highest ? val : Fcons (val, Qnil)); |
4ed46869 | 6424 | } |
4ed46869 | 6425 | |
d46c5b12 KH |
6426 | /* At first, gather possible coding systems in VAL. */ |
6427 | val = Qnil; | |
fa42c37f | 6428 | for (tmp = Vcoding_category_list; CONSP (tmp); tmp = XCDR (tmp)) |
4ed46869 | 6429 | { |
fa42c37f KH |
6430 | Lisp_Object category_val, category_index; |
6431 | ||
6432 | category_index = Fget (XCAR (tmp), Qcoding_category_index); | |
6433 | category_val = Fsymbol_value (XCAR (tmp)); | |
6434 | if (!NILP (category_val) | |
6435 | && NATNUMP (category_index) | |
6436 | && (coding_mask & (1 << XFASTINT (category_index)))) | |
4ed46869 | 6437 | { |
fa42c37f | 6438 | val = Fcons (category_val, val); |
d46c5b12 KH |
6439 | if (highest) |
6440 | break; | |
4ed46869 KH |
6441 | } |
6442 | } | |
d46c5b12 KH |
6443 | if (!highest) |
6444 | val = Fnreverse (val); | |
4ed46869 | 6445 | |
65059037 | 6446 | /* Then, replace the elements with subsidiary coding systems. */ |
fa42c37f | 6447 | for (tmp = val; CONSP (tmp); tmp = XCDR (tmp)) |
4ed46869 | 6448 | { |
65059037 RS |
6449 | if (eol_type != CODING_EOL_UNDECIDED |
6450 | && eol_type != CODING_EOL_INCONSISTENT) | |
4ed46869 | 6451 | { |
d46c5b12 | 6452 | Lisp_Object eol; |
03699b14 | 6453 | eol = Fget (XCAR (tmp), Qeol_type); |
d46c5b12 | 6454 | if (VECTORP (eol)) |
f3fbd155 | 6455 | XSETCAR (tmp, XVECTOR (eol)->contents[eol_type]); |
4ed46869 KH |
6456 | } |
6457 | } | |
03699b14 | 6458 | return (highest ? XCAR (val) : val); |
93dec019 | 6459 | } |
4ed46869 | 6460 | |
d46c5b12 KH |
6461 | DEFUN ("detect-coding-region", Fdetect_coding_region, Sdetect_coding_region, |
6462 | 2, 3, 0, | |
40fd536c KH |
6463 | doc: /* Detect how the byte sequence in the region is encoded. |
6464 | Return a list of possible coding systems used on decoding a byte | |
6465 | sequence containing the bytes in the region between START and END when | |
6466 | the coding system `undecided' is specified. The list is ordered by | |
6467 | priority decided in the current language environment. | |
48b0f3ae PJ |
6468 | |
6469 | If only ASCII characters are found, it returns a list of single element | |
6470 | `undecided' or its subsidiary coding system according to a detected | |
6471 | end-of-line format. | |
6472 | ||
6473 | If optional argument HIGHEST is non-nil, return the coding system of | |
6474 | highest priority. */) | |
6475 | (start, end, highest) | |
d46c5b12 KH |
6476 | Lisp_Object start, end, highest; |
6477 | { | |
6478 | int from, to; | |
6479 | int from_byte, to_byte; | |
682169fe | 6480 | int include_anchor_byte = 0; |
6289dd10 | 6481 | |
b7826503 PJ |
6482 | CHECK_NUMBER_COERCE_MARKER (start); |
6483 | CHECK_NUMBER_COERCE_MARKER (end); | |
4ed46869 | 6484 | |
d46c5b12 KH |
6485 | validate_region (&start, &end); |
6486 | from = XINT (start), to = XINT (end); | |
6487 | from_byte = CHAR_TO_BYTE (from); | |
6488 | to_byte = CHAR_TO_BYTE (to); | |
6289dd10 | 6489 | |
d46c5b12 KH |
6490 | if (from < GPT && to >= GPT) |
6491 | move_gap_both (to, to_byte); | |
c210f766 KH |
6492 | /* If we an anchor byte `\0' follows the region, we include it in |
6493 | the detecting source. Then code detectors can handle the tailing | |
6494 | byte sequence more accurately. | |
6495 | ||
7d0393cf | 6496 | Fix me: This is not a perfect solution. It is better that we |
c210f766 KH |
6497 | add one more argument, say LAST_BLOCK, to all detect_coding_XXX. |
6498 | */ | |
682169fe KH |
6499 | if (to == Z || (to == GPT && GAP_SIZE > 0)) |
6500 | include_anchor_byte = 1; | |
d46c5b12 | 6501 | return detect_coding_system (BYTE_POS_ADDR (from_byte), |
682169fe | 6502 | to_byte - from_byte + include_anchor_byte, |
0a28aafb KH |
6503 | !NILP (highest), |
6504 | !NILP (current_buffer | |
6505 | ->enable_multibyte_characters)); | |
d46c5b12 | 6506 | } |
6289dd10 | 6507 | |
d46c5b12 KH |
6508 | DEFUN ("detect-coding-string", Fdetect_coding_string, Sdetect_coding_string, |
6509 | 1, 2, 0, | |
eec1f3c7 KH |
6510 | doc: /* Detect how the byte sequence in STRING is encoded. |
6511 | Return a list of possible coding systems used on decoding a byte | |
6512 | sequence containing the bytes in STRING when the coding system | |
6513 | `undecided' is specified. The list is ordered by priority decided in | |
6514 | the current language environment. | |
48b0f3ae PJ |
6515 | |
6516 | If only ASCII characters are found, it returns a list of single element | |
6517 | `undecided' or its subsidiary coding system according to a detected | |
6518 | end-of-line format. | |
6519 | ||
6520 | If optional argument HIGHEST is non-nil, return the coding system of | |
6521 | highest priority. */) | |
6522 | (string, highest) | |
d46c5b12 KH |
6523 | Lisp_Object string, highest; |
6524 | { | |
b7826503 | 6525 | CHECK_STRING (string); |
4ed46869 | 6526 | |
d5db4077 | 6527 | return detect_coding_system (SDATA (string), |
682169fe KH |
6528 | /* "+ 1" is to include the anchor byte |
6529 | `\0'. With this, code detectors can | |
c210f766 KH |
6530 | handle the tailing bytes more |
6531 | accurately. */ | |
d5db4077 | 6532 | SBYTES (string) + 1, |
0a28aafb KH |
6533 | !NILP (highest), |
6534 | STRING_MULTIBYTE (string)); | |
4ed46869 KH |
6535 | } |
6536 | ||
05e6f5dc KH |
6537 | /* Subroutine for Fsafe_coding_systems_region_internal. |
6538 | ||
6539 | Return a list of coding systems that safely encode the multibyte | |
b666620c | 6540 | text between P and PEND. SAFE_CODINGS, if non-nil, is an alist of |
05e6f5dc KH |
6541 | possible coding systems. If it is nil, it means that we have not |
6542 | yet found any coding systems. | |
6543 | ||
6544 | WORK_TABLE is a copy of the char-table Vchar_coding_system_table. An | |
6545 | element of WORK_TABLE is set to t once the element is looked up. | |
6546 | ||
6547 | If a non-ASCII single byte char is found, set | |
6548 | *single_byte_char_found to 1. */ | |
6549 | ||
6550 | static Lisp_Object | |
6551 | find_safe_codings (p, pend, safe_codings, work_table, single_byte_char_found) | |
6552 | unsigned char *p, *pend; | |
6553 | Lisp_Object safe_codings, work_table; | |
6554 | int *single_byte_char_found; | |
6b89e3aa | 6555 | { |
f1ce3dcf | 6556 | int c, len; |
6b89e3aa KH |
6557 | Lisp_Object val, ch; |
6558 | Lisp_Object prev, tail; | |
177c0ea7 | 6559 | |
6b89e3aa KH |
6560 | while (p < pend) |
6561 | { | |
6562 | c = STRING_CHAR_AND_LENGTH (p, pend - p, len); | |
6563 | p += len; | |
6564 | if (ASCII_BYTE_P (c)) | |
6565 | /* We can ignore ASCII characters here. */ | |
6566 | continue; | |
6567 | if (SINGLE_BYTE_CHAR_P (c)) | |
6568 | *single_byte_char_found = 1; | |
6569 | if (NILP (safe_codings)) | |
b666620c KH |
6570 | /* Already all coding systems are excluded. But, we can't |
6571 | terminate the loop here because non-ASCII single-byte char | |
6572 | must be found. */ | |
6b89e3aa KH |
6573 | continue; |
6574 | /* Check the safe coding systems for C. */ | |
6575 | ch = make_number (c); | |
6576 | val = Faref (work_table, ch); | |
6577 | if (EQ (val, Qt)) | |
6578 | /* This element was already checked. Ignore it. */ | |
6579 | continue; | |
6580 | /* Remember that we checked this element. */ | |
6581 | Faset (work_table, ch, Qt); | |
6582 | ||
6583 | for (prev = tail = safe_codings; CONSP (tail); tail = XCDR (tail)) | |
6584 | { | |
b666620c KH |
6585 | Lisp_Object elt, translation_table, hash_table, accept_latin_extra; |
6586 | int encodable; | |
6587 | ||
6588 | elt = XCAR (tail); | |
6589 | if (CONSP (XCDR (elt))) | |
6590 | { | |
6591 | /* This entry has this format now: | |
6592 | ( CODING SAFE-CHARS TRANSLATION-TABLE HASH-TABLE | |
6593 | ACCEPT-LATIN-EXTRA ) */ | |
6594 | val = XCDR (elt); | |
6595 | encodable = ! NILP (Faref (XCAR (val), ch)); | |
6596 | if (! encodable) | |
6597 | { | |
6598 | val = XCDR (val); | |
6599 | translation_table = XCAR (val); | |
6600 | hash_table = XCAR (XCDR (val)); | |
6601 | accept_latin_extra = XCAR (XCDR (XCDR (val))); | |
6602 | } | |
6603 | } | |
6604 | else | |
6605 | { | |
6606 | /* This entry has this format now: ( CODING . SAFE-CHARS) */ | |
6607 | encodable = ! NILP (Faref (XCDR (elt), ch)); | |
6608 | if (! encodable) | |
6609 | { | |
6610 | /* Transform the format to: | |
6611 | ( CODING SAFE-CHARS TRANSLATION-TABLE HASH-TABLE | |
6612 | ACCEPT-LATIN-EXTRA ) */ | |
6613 | val = Fget (XCAR (elt), Qcoding_system); | |
6614 | translation_table | |
6615 | = Fplist_get (AREF (val, 3), | |
6616 | Qtranslation_table_for_encode); | |
6617 | if (SYMBOLP (translation_table)) | |
6618 | translation_table = Fget (translation_table, | |
6619 | Qtranslation_table); | |
6620 | hash_table | |
6621 | = (CHAR_TABLE_P (translation_table) | |
6622 | ? XCHAR_TABLE (translation_table)->extras[1] | |
6623 | : Qnil); | |
6624 | accept_latin_extra | |
6625 | = ((EQ (AREF (val, 0), make_number (2)) | |
6626 | && VECTORP (AREF (val, 4))) | |
58f99379 | 6627 | ? AREF (AREF (val, 4), 16) |
b666620c KH |
6628 | : Qnil); |
6629 | XSETCAR (tail, list5 (XCAR (elt), XCDR (elt), | |
6630 | translation_table, hash_table, | |
6631 | accept_latin_extra)); | |
6632 | } | |
6633 | } | |
6634 | ||
6635 | if (! encodable | |
6636 | && ((CHAR_TABLE_P (translation_table) | |
6637 | && ! NILP (Faref (translation_table, ch))) | |
6638 | || (HASH_TABLE_P (hash_table) | |
6639 | && ! NILP (Fgethash (ch, hash_table, Qnil))) | |
6640 | || (SINGLE_BYTE_CHAR_P (c) | |
6641 | && ! NILP (accept_latin_extra) | |
6642 | && VECTORP (Vlatin_extra_code_table) | |
6643 | && ! NILP (AREF (Vlatin_extra_code_table, c))))) | |
6644 | encodable = 1; | |
6645 | if (encodable) | |
6646 | prev = tail; | |
6647 | else | |
6b89e3aa | 6648 | { |
7c695ab9 | 6649 | /* Exclude this coding system from SAFE_CODINGS. */ |
6b89e3aa KH |
6650 | if (EQ (tail, safe_codings)) |
6651 | safe_codings = XCDR (safe_codings); | |
6652 | else | |
6653 | XSETCDR (prev, XCDR (tail)); | |
6654 | } | |
6b89e3aa KH |
6655 | } |
6656 | } | |
6657 | return safe_codings; | |
6658 | } | |
6659 | ||
067a6a66 KH |
6660 | DEFUN ("find-coding-systems-region-internal", |
6661 | Ffind_coding_systems_region_internal, | |
6662 | Sfind_coding_systems_region_internal, 2, 2, 0, | |
6b89e3aa KH |
6663 | doc: /* Internal use only. */) |
6664 | (start, end) | |
6665 | Lisp_Object start, end; | |
6666 | { | |
6667 | Lisp_Object work_table, safe_codings; | |
6668 | int non_ascii_p = 0; | |
6669 | int single_byte_char_found = 0; | |
6670 | const unsigned char *p1, *p1end, *p2, *p2end, *p; | |
6671 | ||
6672 | if (STRINGP (start)) | |
6673 | { | |
6674 | if (!STRING_MULTIBYTE (start)) | |
6675 | return Qt; | |
6676 | p1 = SDATA (start), p1end = p1 + SBYTES (start); | |
6677 | p2 = p2end = p1end; | |
6678 | if (SCHARS (start) != SBYTES (start)) | |
6679 | non_ascii_p = 1; | |
6680 | } | |
6681 | else | |
6682 | { | |
6683 | int from, to, stop; | |
6684 | ||
6685 | CHECK_NUMBER_COERCE_MARKER (start); | |
6686 | CHECK_NUMBER_COERCE_MARKER (end); | |
6687 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) | |
6688 | args_out_of_range (start, end); | |
6689 | if (NILP (current_buffer->enable_multibyte_characters)) | |
6690 | return Qt; | |
6691 | from = CHAR_TO_BYTE (XINT (start)); | |
6692 | to = CHAR_TO_BYTE (XINT (end)); | |
6693 | stop = from < GPT_BYTE && GPT_BYTE < to ? GPT_BYTE : to; | |
6694 | p1 = BYTE_POS_ADDR (from), p1end = p1 + (stop - from); | |
6695 | if (stop == to) | |
6696 | p2 = p2end = p1end; | |
6697 | else | |
6698 | p2 = BYTE_POS_ADDR (stop), p2end = p2 + (to - stop); | |
6699 | if (XINT (end) - XINT (start) != to - from) | |
6700 | non_ascii_p = 1; | |
6701 | } | |
6702 | ||
6703 | if (!non_ascii_p) | |
6704 | { | |
6705 | /* We are sure that the text contains no multibyte character. | |
6706 | Check if it contains eight-bit-graphic. */ | |
6707 | p = p1; | |
6708 | for (p = p1; p < p1end && ASCII_BYTE_P (*p); p++); | |
6709 | if (p == p1end) | |
6710 | { | |
6711 | for (p = p2; p < p2end && ASCII_BYTE_P (*p); p++); | |
6712 | if (p == p2end) | |
6713 | return Qt; | |
6714 | } | |
6715 | } | |
6716 | ||
6717 | /* The text contains non-ASCII characters. */ | |
6718 | ||
6719 | work_table = Fmake_char_table (Qchar_coding_system, Qnil); | |
6720 | safe_codings = Fcopy_sequence (XCDR (Vcoding_system_safe_chars)); | |
6721 | ||
067a6a66 KH |
6722 | safe_codings = find_safe_codings (p1, p1end, safe_codings, work_table, |
6723 | &single_byte_char_found); | |
6b89e3aa | 6724 | if (p2 < p2end) |
067a6a66 KH |
6725 | safe_codings = find_safe_codings (p2, p2end, safe_codings, work_table, |
6726 | &single_byte_char_found); | |
6b89e3aa KH |
6727 | if (EQ (safe_codings, XCDR (Vcoding_system_safe_chars))) |
6728 | safe_codings = Qt; | |
6729 | else | |
6730 | { | |
6731 | /* Turn safe_codings to a list of coding systems... */ | |
6732 | Lisp_Object val; | |
6733 | ||
6734 | if (single_byte_char_found) | |
6735 | /* ... and append these for eight-bit chars. */ | |
6736 | val = Fcons (Qraw_text, | |
6737 | Fcons (Qemacs_mule, Fcons (Qno_conversion, Qnil))); | |
6738 | else | |
6739 | /* ... and append generic coding systems. */ | |
6740 | val = Fcopy_sequence (XCAR (Vcoding_system_safe_chars)); | |
177c0ea7 | 6741 | |
6b89e3aa KH |
6742 | for (; CONSP (safe_codings); safe_codings = XCDR (safe_codings)) |
6743 | val = Fcons (XCAR (XCAR (safe_codings)), val); | |
6744 | safe_codings = val; | |
6745 | } | |
6746 | ||
6747 | return safe_codings; | |
6748 | } | |
6749 | ||
6750 | ||
068a9dbd KH |
6751 | /* Search from position POS for such characters that are unencodable |
6752 | accoding to SAFE_CHARS, and return a list of their positions. P | |
6753 | points where in the memory the character at POS exists. Limit the | |
6754 | search at PEND or when Nth unencodable characters are found. | |
6755 | ||
6756 | If SAFE_CHARS is a char table, an element for an unencodable | |
6757 | character is nil. | |
6758 | ||
6759 | If SAFE_CHARS is nil, all non-ASCII characters are unencodable. | |
6760 | ||
6761 | Otherwise, SAFE_CHARS is t, and only eight-bit-contrl and | |
6762 | eight-bit-graphic characters are unencodable. */ | |
6763 | ||
6764 | static Lisp_Object | |
6765 | unencodable_char_position (safe_chars, pos, p, pend, n) | |
6766 | Lisp_Object safe_chars; | |
6767 | int pos; | |
6768 | unsigned char *p, *pend; | |
6769 | int n; | |
6770 | { | |
6771 | Lisp_Object pos_list; | |
6772 | ||
6773 | pos_list = Qnil; | |
6774 | while (p < pend) | |
6775 | { | |
6776 | int len; | |
6777 | int c = STRING_CHAR_AND_LENGTH (p, MAX_MULTIBYTE_LENGTH, len); | |
7d0393cf | 6778 | |
068a9dbd KH |
6779 | if (c >= 128 |
6780 | && (CHAR_TABLE_P (safe_chars) | |
6781 | ? NILP (CHAR_TABLE_REF (safe_chars, c)) | |
6782 | : (NILP (safe_chars) || c < 256))) | |
6783 | { | |
6784 | pos_list = Fcons (make_number (pos), pos_list); | |
6785 | if (--n <= 0) | |
6786 | break; | |
6787 | } | |
6788 | pos++; | |
6789 | p += len; | |
6790 | } | |
6791 | return Fnreverse (pos_list); | |
6792 | } | |
6793 | ||
6794 | ||
6795 | DEFUN ("unencodable-char-position", Funencodable_char_position, | |
6796 | Sunencodable_char_position, 3, 5, 0, | |
6797 | doc: /* | |
6798 | Return position of first un-encodable character in a region. | |
6799 | START and END specfiy the region and CODING-SYSTEM specifies the | |
6800 | encoding to check. Return nil if CODING-SYSTEM does encode the region. | |
6801 | ||
6802 | If optional 4th argument COUNT is non-nil, it specifies at most how | |
6803 | many un-encodable characters to search. In this case, the value is a | |
6804 | list of positions. | |
6805 | ||
6806 | If optional 5th argument STRING is non-nil, it is a string to search | |
6807 | for un-encodable characters. In that case, START and END are indexes | |
6808 | to the string. */) | |
6809 | (start, end, coding_system, count, string) | |
6810 | Lisp_Object start, end, coding_system, count, string; | |
6811 | { | |
6812 | int n; | |
6813 | Lisp_Object safe_chars; | |
6814 | struct coding_system coding; | |
6815 | Lisp_Object positions; | |
6816 | int from, to; | |
6817 | unsigned char *p, *pend; | |
6818 | ||
6819 | if (NILP (string)) | |
6820 | { | |
6821 | validate_region (&start, &end); | |
6822 | from = XINT (start); | |
6823 | to = XINT (end); | |
6824 | if (NILP (current_buffer->enable_multibyte_characters)) | |
6825 | return Qnil; | |
6826 | p = CHAR_POS_ADDR (from); | |
200c93e2 KH |
6827 | if (to == GPT) |
6828 | pend = GPT_ADDR; | |
6829 | else | |
6830 | pend = CHAR_POS_ADDR (to); | |
068a9dbd KH |
6831 | } |
6832 | else | |
6833 | { | |
6834 | CHECK_STRING (string); | |
6835 | CHECK_NATNUM (start); | |
6836 | CHECK_NATNUM (end); | |
6837 | from = XINT (start); | |
6838 | to = XINT (end); | |
6839 | if (from > to | |
6840 | || to > SCHARS (string)) | |
6841 | args_out_of_range_3 (string, start, end); | |
6842 | if (! STRING_MULTIBYTE (string)) | |
6843 | return Qnil; | |
6844 | p = SDATA (string) + string_char_to_byte (string, from); | |
6845 | pend = SDATA (string) + string_char_to_byte (string, to); | |
6846 | } | |
6847 | ||
6848 | setup_coding_system (Fcheck_coding_system (coding_system), &coding); | |
6849 | ||
6850 | if (NILP (count)) | |
6851 | n = 1; | |
6852 | else | |
6853 | { | |
6854 | CHECK_NATNUM (count); | |
6855 | n = XINT (count); | |
6856 | } | |
6857 | ||
6858 | if (coding.type == coding_type_no_conversion | |
6859 | || coding.type == coding_type_raw_text) | |
6860 | return Qnil; | |
6861 | ||
6862 | if (coding.type == coding_type_undecided) | |
6863 | safe_chars = Qnil; | |
6864 | else | |
6b89e3aa | 6865 | safe_chars = coding_safe_chars (coding_system); |
068a9dbd KH |
6866 | |
6867 | if (STRINGP (string) | |
6868 | || from >= GPT || to <= GPT) | |
6869 | positions = unencodable_char_position (safe_chars, from, p, pend, n); | |
6870 | else | |
6871 | { | |
6872 | Lisp_Object args[2]; | |
6873 | ||
6874 | args[0] = unencodable_char_position (safe_chars, from, p, GPT_ADDR, n); | |
96d2e64d | 6875 | n -= XINT (Flength (args[0])); |
068a9dbd KH |
6876 | if (n <= 0) |
6877 | positions = args[0]; | |
6878 | else | |
6879 | { | |
6880 | args[1] = unencodable_char_position (safe_chars, GPT, GAP_END_ADDR, | |
6881 | pend, n); | |
6882 | positions = Fappend (2, args); | |
6883 | } | |
6884 | } | |
6885 | ||
6886 | return (NILP (count) ? Fcar (positions) : positions); | |
6887 | } | |
6888 | ||
6889 | ||
4031e2bf KH |
6890 | Lisp_Object |
6891 | code_convert_region1 (start, end, coding_system, encodep) | |
d46c5b12 | 6892 | Lisp_Object start, end, coding_system; |
4031e2bf | 6893 | int encodep; |
3a73fa5d RS |
6894 | { |
6895 | struct coding_system coding; | |
da55a2b7 | 6896 | int from, to; |
3a73fa5d | 6897 | |
b7826503 PJ |
6898 | CHECK_NUMBER_COERCE_MARKER (start); |
6899 | CHECK_NUMBER_COERCE_MARKER (end); | |
6900 | CHECK_SYMBOL (coding_system); | |
3a73fa5d | 6901 | |
d46c5b12 KH |
6902 | validate_region (&start, &end); |
6903 | from = XFASTINT (start); | |
6904 | to = XFASTINT (end); | |
6905 | ||
3a73fa5d | 6906 | if (NILP (coding_system)) |
d46c5b12 KH |
6907 | return make_number (to - from); |
6908 | ||
3a73fa5d | 6909 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) |
d5db4077 | 6910 | error ("Invalid coding system: %s", SDATA (SYMBOL_NAME (coding_system))); |
3a73fa5d | 6911 | |
d46c5b12 | 6912 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
6913 | coding.src_multibyte = coding.dst_multibyte |
6914 | = !NILP (current_buffer->enable_multibyte_characters); | |
fb88bf2d KH |
6915 | code_convert_region (from, CHAR_TO_BYTE (from), to, CHAR_TO_BYTE (to), |
6916 | &coding, encodep, 1); | |
f072a3e8 | 6917 | Vlast_coding_system_used = coding.symbol; |
fb88bf2d | 6918 | return make_number (coding.produced_char); |
4031e2bf KH |
6919 | } |
6920 | ||
6921 | DEFUN ("decode-coding-region", Fdecode_coding_region, Sdecode_coding_region, | |
6922 | 3, 3, "r\nzCoding system: ", | |
48b0f3ae PJ |
6923 | doc: /* Decode the current region from the specified coding system. |
6924 | When called from a program, takes three arguments: | |
6925 | START, END, and CODING-SYSTEM. START and END are buffer positions. | |
6926 | This function sets `last-coding-system-used' to the precise coding system | |
6927 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6928 | not fully specified.) | |
6929 | It returns the length of the decoded text. */) | |
6930 | (start, end, coding_system) | |
4031e2bf KH |
6931 | Lisp_Object start, end, coding_system; |
6932 | { | |
6933 | return code_convert_region1 (start, end, coding_system, 0); | |
3a73fa5d RS |
6934 | } |
6935 | ||
6936 | DEFUN ("encode-coding-region", Fencode_coding_region, Sencode_coding_region, | |
6937 | 3, 3, "r\nzCoding system: ", | |
48b0f3ae PJ |
6938 | doc: /* Encode the current region into the specified coding system. |
6939 | When called from a program, takes three arguments: | |
6940 | START, END, and CODING-SYSTEM. START and END are buffer positions. | |
6941 | This function sets `last-coding-system-used' to the precise coding system | |
6942 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6943 | not fully specified.) | |
6944 | It returns the length of the encoded text. */) | |
6945 | (start, end, coding_system) | |
d46c5b12 | 6946 | Lisp_Object start, end, coding_system; |
3a73fa5d | 6947 | { |
4031e2bf KH |
6948 | return code_convert_region1 (start, end, coding_system, 1); |
6949 | } | |
3a73fa5d | 6950 | |
4031e2bf KH |
6951 | Lisp_Object |
6952 | code_convert_string1 (string, coding_system, nocopy, encodep) | |
6953 | Lisp_Object string, coding_system, nocopy; | |
6954 | int encodep; | |
6955 | { | |
6956 | struct coding_system coding; | |
3a73fa5d | 6957 | |
b7826503 PJ |
6958 | CHECK_STRING (string); |
6959 | CHECK_SYMBOL (coding_system); | |
4ed46869 | 6960 | |
d46c5b12 | 6961 | if (NILP (coding_system)) |
4031e2bf | 6962 | return (NILP (nocopy) ? Fcopy_sequence (string) : string); |
4ed46869 | 6963 | |
d46c5b12 | 6964 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) |
d5db4077 | 6965 | error ("Invalid coding system: %s", SDATA (SYMBOL_NAME (coding_system))); |
5f1cd180 | 6966 | |
d46c5b12 | 6967 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
6968 | string = (encodep |
6969 | ? encode_coding_string (string, &coding, !NILP (nocopy)) | |
6970 | : decode_coding_string (string, &coding, !NILP (nocopy))); | |
f072a3e8 | 6971 | Vlast_coding_system_used = coding.symbol; |
ec6d2bb8 KH |
6972 | |
6973 | return string; | |
4ed46869 KH |
6974 | } |
6975 | ||
4ed46869 | 6976 | DEFUN ("decode-coding-string", Fdecode_coding_string, Sdecode_coding_string, |
e0e989f6 | 6977 | 2, 3, 0, |
48b0f3ae PJ |
6978 | doc: /* Decode STRING which is encoded in CODING-SYSTEM, and return the result. |
6979 | Optional arg NOCOPY non-nil means it is OK to return STRING itself | |
6980 | if the decoding operation is trivial. | |
6981 | This function sets `last-coding-system-used' to the precise coding system | |
6982 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6983 | not fully specified.) */) | |
6984 | (string, coding_system, nocopy) | |
e0e989f6 | 6985 | Lisp_Object string, coding_system, nocopy; |
4ed46869 | 6986 | { |
f072a3e8 | 6987 | return code_convert_string1 (string, coding_system, nocopy, 0); |
4ed46869 KH |
6988 | } |
6989 | ||
6990 | DEFUN ("encode-coding-string", Fencode_coding_string, Sencode_coding_string, | |
e0e989f6 | 6991 | 2, 3, 0, |
48b0f3ae PJ |
6992 | doc: /* Encode STRING to CODING-SYSTEM, and return the result. |
6993 | Optional arg NOCOPY non-nil means it is OK to return STRING itself | |
6994 | if the encoding operation is trivial. | |
6995 | This function sets `last-coding-system-used' to the precise coding system | |
6996 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6997 | not fully specified.) */) | |
6998 | (string, coding_system, nocopy) | |
e0e989f6 | 6999 | Lisp_Object string, coding_system, nocopy; |
4ed46869 | 7000 | { |
f072a3e8 | 7001 | return code_convert_string1 (string, coding_system, nocopy, 1); |
4ed46869 | 7002 | } |
4031e2bf | 7003 | |
ecec61c1 | 7004 | /* Encode or decode STRING according to CODING_SYSTEM. |
ec6d2bb8 KH |
7005 | Do not set Vlast_coding_system_used. |
7006 | ||
7007 | This function is called only from macros DECODE_FILE and | |
7008 | ENCODE_FILE, thus we ignore character composition. */ | |
ecec61c1 KH |
7009 | |
7010 | Lisp_Object | |
7011 | code_convert_string_norecord (string, coding_system, encodep) | |
7012 | Lisp_Object string, coding_system; | |
7013 | int encodep; | |
7014 | { | |
7015 | struct coding_system coding; | |
7016 | ||
b7826503 PJ |
7017 | CHECK_STRING (string); |
7018 | CHECK_SYMBOL (coding_system); | |
ecec61c1 KH |
7019 | |
7020 | if (NILP (coding_system)) | |
7021 | return string; | |
7022 | ||
7023 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) | |
d5db4077 | 7024 | error ("Invalid coding system: %s", SDATA (SYMBOL_NAME (coding_system))); |
ecec61c1 | 7025 | |
ec6d2bb8 | 7026 | coding.composing = COMPOSITION_DISABLED; |
ecec61c1 | 7027 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
7028 | return (encodep |
7029 | ? encode_coding_string (string, &coding, 1) | |
7030 | : decode_coding_string (string, &coding, 1)); | |
ecec61c1 | 7031 | } |
3a73fa5d | 7032 | \f |
4ed46869 | 7033 | DEFUN ("decode-sjis-char", Fdecode_sjis_char, Sdecode_sjis_char, 1, 1, 0, |
48b0f3ae PJ |
7034 | doc: /* Decode a Japanese character which has CODE in shift_jis encoding. |
7035 | Return the corresponding character. */) | |
7036 | (code) | |
4ed46869 KH |
7037 | Lisp_Object code; |
7038 | { | |
7039 | unsigned char c1, c2, s1, s2; | |
7040 | Lisp_Object val; | |
7041 | ||
b7826503 | 7042 | CHECK_NUMBER (code); |
4ed46869 | 7043 | s1 = (XFASTINT (code)) >> 8, s2 = (XFASTINT (code)) & 0xFF; |
55ab7be3 KH |
7044 | if (s1 == 0) |
7045 | { | |
c28a9453 KH |
7046 | if (s2 < 0x80) |
7047 | XSETFASTINT (val, s2); | |
7048 | else if (s2 >= 0xA0 || s2 <= 0xDF) | |
b73bfc1c | 7049 | XSETFASTINT (val, MAKE_CHAR (charset_katakana_jisx0201, s2, 0)); |
c28a9453 | 7050 | else |
9da8350f | 7051 | error ("Invalid Shift JIS code: %x", XFASTINT (code)); |
55ab7be3 KH |
7052 | } |
7053 | else | |
7054 | { | |
87323294 | 7055 | if ((s1 < 0x80 || (s1 > 0x9F && s1 < 0xE0) || s1 > 0xEF) |
55ab7be3 | 7056 | || (s2 < 0x40 || s2 == 0x7F || s2 > 0xFC)) |
9da8350f | 7057 | error ("Invalid Shift JIS code: %x", XFASTINT (code)); |
55ab7be3 | 7058 | DECODE_SJIS (s1, s2, c1, c2); |
b73bfc1c | 7059 | XSETFASTINT (val, MAKE_CHAR (charset_jisx0208, c1, c2)); |
55ab7be3 | 7060 | } |
4ed46869 KH |
7061 | return val; |
7062 | } | |
7063 | ||
7064 | DEFUN ("encode-sjis-char", Fencode_sjis_char, Sencode_sjis_char, 1, 1, 0, | |
48b0f3ae PJ |
7065 | doc: /* Encode a Japanese character CHAR to shift_jis encoding. |
7066 | Return the corresponding code in SJIS. */) | |
7067 | (ch) | |
4ed46869 KH |
7068 | Lisp_Object ch; |
7069 | { | |
bcf26d6a | 7070 | int charset, c1, c2, s1, s2; |
4ed46869 KH |
7071 | Lisp_Object val; |
7072 | ||
b7826503 | 7073 | CHECK_NUMBER (ch); |
4ed46869 | 7074 | SPLIT_CHAR (XFASTINT (ch), charset, c1, c2); |
c28a9453 KH |
7075 | if (charset == CHARSET_ASCII) |
7076 | { | |
7077 | val = ch; | |
7078 | } | |
7079 | else if (charset == charset_jisx0208 | |
7080 | && c1 > 0x20 && c1 < 0x7F && c2 > 0x20 && c2 < 0x7F) | |
4ed46869 KH |
7081 | { |
7082 | ENCODE_SJIS (c1, c2, s1, s2); | |
bcf26d6a | 7083 | XSETFASTINT (val, (s1 << 8) | s2); |
4ed46869 | 7084 | } |
55ab7be3 KH |
7085 | else if (charset == charset_katakana_jisx0201 |
7086 | && c1 > 0x20 && c2 < 0xE0) | |
7087 | { | |
7088 | XSETFASTINT (val, c1 | 0x80); | |
7089 | } | |
4ed46869 | 7090 | else |
55ab7be3 | 7091 | error ("Can't encode to shift_jis: %d", XFASTINT (ch)); |
4ed46869 KH |
7092 | return val; |
7093 | } | |
7094 | ||
7095 | DEFUN ("decode-big5-char", Fdecode_big5_char, Sdecode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
7096 | doc: /* Decode a Big5 character which has CODE in BIG5 coding system. |
7097 | Return the corresponding character. */) | |
7098 | (code) | |
4ed46869 KH |
7099 | Lisp_Object code; |
7100 | { | |
7101 | int charset; | |
7102 | unsigned char b1, b2, c1, c2; | |
7103 | Lisp_Object val; | |
7104 | ||
b7826503 | 7105 | CHECK_NUMBER (code); |
4ed46869 | 7106 | b1 = (XFASTINT (code)) >> 8, b2 = (XFASTINT (code)) & 0xFF; |
c28a9453 KH |
7107 | if (b1 == 0) |
7108 | { | |
7109 | if (b2 >= 0x80) | |
9da8350f | 7110 | error ("Invalid BIG5 code: %x", XFASTINT (code)); |
c28a9453 KH |
7111 | val = code; |
7112 | } | |
7113 | else | |
7114 | { | |
7115 | if ((b1 < 0xA1 || b1 > 0xFE) | |
7116 | || (b2 < 0x40 || (b2 > 0x7E && b2 < 0xA1) || b2 > 0xFE)) | |
9da8350f | 7117 | error ("Invalid BIG5 code: %x", XFASTINT (code)); |
c28a9453 | 7118 | DECODE_BIG5 (b1, b2, charset, c1, c2); |
b73bfc1c | 7119 | XSETFASTINT (val, MAKE_CHAR (charset, c1, c2)); |
c28a9453 | 7120 | } |
4ed46869 KH |
7121 | return val; |
7122 | } | |
7123 | ||
7124 | DEFUN ("encode-big5-char", Fencode_big5_char, Sencode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
7125 | doc: /* Encode the Big5 character CHAR to BIG5 coding system. |
7126 | Return the corresponding character code in Big5. */) | |
7127 | (ch) | |
4ed46869 KH |
7128 | Lisp_Object ch; |
7129 | { | |
bcf26d6a | 7130 | int charset, c1, c2, b1, b2; |
4ed46869 KH |
7131 | Lisp_Object val; |
7132 | ||
b7826503 | 7133 | CHECK_NUMBER (ch); |
4ed46869 | 7134 | SPLIT_CHAR (XFASTINT (ch), charset, c1, c2); |
c28a9453 KH |
7135 | if (charset == CHARSET_ASCII) |
7136 | { | |
7137 | val = ch; | |
7138 | } | |
7139 | else if ((charset == charset_big5_1 | |
7140 | && (XFASTINT (ch) >= 0x250a1 && XFASTINT (ch) <= 0x271ec)) | |
7141 | || (charset == charset_big5_2 | |
7142 | && XFASTINT (ch) >= 0x290a1 && XFASTINT (ch) <= 0x2bdb2)) | |
4ed46869 KH |
7143 | { |
7144 | ENCODE_BIG5 (charset, c1, c2, b1, b2); | |
bcf26d6a | 7145 | XSETFASTINT (val, (b1 << 8) | b2); |
4ed46869 KH |
7146 | } |
7147 | else | |
c28a9453 | 7148 | error ("Can't encode to Big5: %d", XFASTINT (ch)); |
4ed46869 KH |
7149 | return val; |
7150 | } | |
3a73fa5d | 7151 | \f |
002fdb44 | 7152 | DEFUN ("set-terminal-coding-system-internal", Fset_terminal_coding_system_internal, |
48b0f3ae PJ |
7153 | Sset_terminal_coding_system_internal, 1, 1, 0, |
7154 | doc: /* Internal use only. */) | |
7155 | (coding_system) | |
4ed46869 KH |
7156 | Lisp_Object coding_system; |
7157 | { | |
b7826503 | 7158 | CHECK_SYMBOL (coding_system); |
4ed46869 | 7159 | setup_coding_system (Fcheck_coding_system (coding_system), &terminal_coding); |
70c22245 | 7160 | /* We had better not send unsafe characters to terminal. */ |
0eecad43 | 7161 | terminal_coding.mode |= CODING_MODE_INHIBIT_UNENCODABLE_CHAR; |
8ca3766a | 7162 | /* Character composition should be disabled. */ |
ec6d2bb8 | 7163 | terminal_coding.composing = COMPOSITION_DISABLED; |
bd64290d KH |
7164 | /* Error notification should be suppressed. */ |
7165 | terminal_coding.suppress_error = 1; | |
b73bfc1c KH |
7166 | terminal_coding.src_multibyte = 1; |
7167 | terminal_coding.dst_multibyte = 0; | |
4ed46869 KH |
7168 | return Qnil; |
7169 | } | |
7170 | ||
002fdb44 | 7171 | DEFUN ("set-safe-terminal-coding-system-internal", Fset_safe_terminal_coding_system_internal, |
48b0f3ae | 7172 | Sset_safe_terminal_coding_system_internal, 1, 1, 0, |
ddb67bdc | 7173 | doc: /* Internal use only. */) |
48b0f3ae | 7174 | (coding_system) |
c4825358 KH |
7175 | Lisp_Object coding_system; |
7176 | { | |
b7826503 | 7177 | CHECK_SYMBOL (coding_system); |
c4825358 KH |
7178 | setup_coding_system (Fcheck_coding_system (coding_system), |
7179 | &safe_terminal_coding); | |
8ca3766a | 7180 | /* Character composition should be disabled. */ |
ec6d2bb8 | 7181 | safe_terminal_coding.composing = COMPOSITION_DISABLED; |
bd64290d KH |
7182 | /* Error notification should be suppressed. */ |
7183 | terminal_coding.suppress_error = 1; | |
b73bfc1c KH |
7184 | safe_terminal_coding.src_multibyte = 1; |
7185 | safe_terminal_coding.dst_multibyte = 0; | |
c4825358 KH |
7186 | return Qnil; |
7187 | } | |
7188 | ||
002fdb44 DL |
7189 | DEFUN ("terminal-coding-system", Fterminal_coding_system, |
7190 | Sterminal_coding_system, 0, 0, 0, | |
48b0f3ae PJ |
7191 | doc: /* Return coding system specified for terminal output. */) |
7192 | () | |
4ed46869 KH |
7193 | { |
7194 | return terminal_coding.symbol; | |
7195 | } | |
7196 | ||
002fdb44 | 7197 | DEFUN ("set-keyboard-coding-system-internal", Fset_keyboard_coding_system_internal, |
48b0f3ae PJ |
7198 | Sset_keyboard_coding_system_internal, 1, 1, 0, |
7199 | doc: /* Internal use only. */) | |
7200 | (coding_system) | |
4ed46869 KH |
7201 | Lisp_Object coding_system; |
7202 | { | |
b7826503 | 7203 | CHECK_SYMBOL (coding_system); |
4ed46869 | 7204 | setup_coding_system (Fcheck_coding_system (coding_system), &keyboard_coding); |
8ca3766a | 7205 | /* Character composition should be disabled. */ |
ec6d2bb8 | 7206 | keyboard_coding.composing = COMPOSITION_DISABLED; |
4ed46869 KH |
7207 | return Qnil; |
7208 | } | |
7209 | ||
002fdb44 DL |
7210 | DEFUN ("keyboard-coding-system", Fkeyboard_coding_system, |
7211 | Skeyboard_coding_system, 0, 0, 0, | |
48b0f3ae PJ |
7212 | doc: /* Return coding system specified for decoding keyboard input. */) |
7213 | () | |
4ed46869 KH |
7214 | { |
7215 | return keyboard_coding.symbol; | |
7216 | } | |
7217 | ||
7218 | \f | |
a5d301df KH |
7219 | DEFUN ("find-operation-coding-system", Ffind_operation_coding_system, |
7220 | Sfind_operation_coding_system, 1, MANY, 0, | |
48b0f3ae PJ |
7221 | doc: /* Choose a coding system for an operation based on the target name. |
7222 | The value names a pair of coding systems: (DECODING-SYSTEM . ENCODING-SYSTEM). | |
7223 | DECODING-SYSTEM is the coding system to use for decoding | |
7224 | \(in case OPERATION does decoding), and ENCODING-SYSTEM is the coding system | |
7225 | for encoding (in case OPERATION does encoding). | |
7226 | ||
7227 | The first argument OPERATION specifies an I/O primitive: | |
7228 | For file I/O, `insert-file-contents' or `write-region'. | |
7229 | For process I/O, `call-process', `call-process-region', or `start-process'. | |
7230 | For network I/O, `open-network-stream'. | |
7231 | ||
7232 | The remaining arguments should be the same arguments that were passed | |
7233 | to the primitive. Depending on which primitive, one of those arguments | |
7234 | is selected as the TARGET. For example, if OPERATION does file I/O, | |
7235 | whichever argument specifies the file name is TARGET. | |
7236 | ||
7237 | TARGET has a meaning which depends on OPERATION: | |
7238 | For file I/O, TARGET is a file name. | |
7239 | For process I/O, TARGET is a process name. | |
7240 | For network I/O, TARGET is a service name or a port number | |
7241 | ||
7242 | This function looks up what specified for TARGET in, | |
7243 | `file-coding-system-alist', `process-coding-system-alist', | |
7244 | or `network-coding-system-alist' depending on OPERATION. | |
7245 | They may specify a coding system, a cons of coding systems, | |
7246 | or a function symbol to call. | |
7247 | In the last case, we call the function with one argument, | |
7248 | which is a list of all the arguments given to this function. | |
7249 | ||
7250 | usage: (find-operation-coding-system OPERATION ARGUMENTS ...) */) | |
7251 | (nargs, args) | |
4ed46869 KH |
7252 | int nargs; |
7253 | Lisp_Object *args; | |
7254 | { | |
7255 | Lisp_Object operation, target_idx, target, val; | |
7256 | register Lisp_Object chain; | |
7257 | ||
7258 | if (nargs < 2) | |
7259 | error ("Too few arguments"); | |
7260 | operation = args[0]; | |
7261 | if (!SYMBOLP (operation) | |
7262 | || !INTEGERP (target_idx = Fget (operation, Qtarget_idx))) | |
8ca3766a | 7263 | error ("Invalid first argument"); |
4ed46869 KH |
7264 | if (nargs < 1 + XINT (target_idx)) |
7265 | error ("Too few arguments for operation: %s", | |
d5db4077 | 7266 | SDATA (SYMBOL_NAME (operation))); |
7f787cfd KH |
7267 | /* For write-region, if the 6th argument (i.e. VISIT, the 5th |
7268 | argument to write-region) is string, it must be treated as a | |
7269 | target file name. */ | |
7270 | if (EQ (operation, Qwrite_region) | |
7271 | && nargs > 5 | |
7272 | && STRINGP (args[5])) | |
d90ed3b4 | 7273 | target_idx = make_number (4); |
4ed46869 KH |
7274 | target = args[XINT (target_idx) + 1]; |
7275 | if (!(STRINGP (target) | |
7276 | || (EQ (operation, Qopen_network_stream) && INTEGERP (target)))) | |
8ca3766a | 7277 | error ("Invalid argument %d", XINT (target_idx) + 1); |
4ed46869 | 7278 | |
2e34157c RS |
7279 | chain = ((EQ (operation, Qinsert_file_contents) |
7280 | || EQ (operation, Qwrite_region)) | |
02ba4723 | 7281 | ? Vfile_coding_system_alist |
2e34157c | 7282 | : (EQ (operation, Qopen_network_stream) |
02ba4723 KH |
7283 | ? Vnetwork_coding_system_alist |
7284 | : Vprocess_coding_system_alist)); | |
4ed46869 KH |
7285 | if (NILP (chain)) |
7286 | return Qnil; | |
7287 | ||
03699b14 | 7288 | for (; CONSP (chain); chain = XCDR (chain)) |
4ed46869 | 7289 | { |
f44d27ce | 7290 | Lisp_Object elt; |
03699b14 | 7291 | elt = XCAR (chain); |
4ed46869 KH |
7292 | |
7293 | if (CONSP (elt) | |
7294 | && ((STRINGP (target) | |
03699b14 KR |
7295 | && STRINGP (XCAR (elt)) |
7296 | && fast_string_match (XCAR (elt), target) >= 0) | |
7297 | || (INTEGERP (target) && EQ (target, XCAR (elt))))) | |
02ba4723 | 7298 | { |
03699b14 | 7299 | val = XCDR (elt); |
b19fd4c5 KH |
7300 | /* Here, if VAL is both a valid coding system and a valid |
7301 | function symbol, we return VAL as a coding system. */ | |
02ba4723 KH |
7302 | if (CONSP (val)) |
7303 | return val; | |
7304 | if (! SYMBOLP (val)) | |
7305 | return Qnil; | |
7306 | if (! NILP (Fcoding_system_p (val))) | |
7307 | return Fcons (val, val); | |
b19fd4c5 KH |
7308 | if (! NILP (Ffboundp (val))) |
7309 | { | |
7310 | val = call1 (val, Flist (nargs, args)); | |
7311 | if (CONSP (val)) | |
7312 | return val; | |
7313 | if (SYMBOLP (val) && ! NILP (Fcoding_system_p (val))) | |
7314 | return Fcons (val, val); | |
7315 | } | |
02ba4723 KH |
7316 | return Qnil; |
7317 | } | |
4ed46869 KH |
7318 | } |
7319 | return Qnil; | |
7320 | } | |
7321 | ||
1397dc18 KH |
7322 | DEFUN ("update-coding-systems-internal", Fupdate_coding_systems_internal, |
7323 | Supdate_coding_systems_internal, 0, 0, 0, | |
48b0f3ae PJ |
7324 | doc: /* Update internal database for ISO2022 and CCL based coding systems. |
7325 | When values of any coding categories are changed, you must | |
7326 | call this function. */) | |
7327 | () | |
d46c5b12 KH |
7328 | { |
7329 | int i; | |
7330 | ||
fa42c37f | 7331 | for (i = CODING_CATEGORY_IDX_EMACS_MULE; i < CODING_CATEGORY_IDX_MAX; i++) |
d46c5b12 | 7332 | { |
1397dc18 KH |
7333 | Lisp_Object val; |
7334 | ||
f5c1dd0d | 7335 | val = SYMBOL_VALUE (XVECTOR (Vcoding_category_table)->contents[i]); |
1397dc18 KH |
7336 | if (!NILP (val)) |
7337 | { | |
7338 | if (! coding_system_table[i]) | |
7339 | coding_system_table[i] = ((struct coding_system *) | |
7340 | xmalloc (sizeof (struct coding_system))); | |
7341 | setup_coding_system (val, coding_system_table[i]); | |
7342 | } | |
7343 | else if (coding_system_table[i]) | |
7344 | { | |
7345 | xfree (coding_system_table[i]); | |
7346 | coding_system_table[i] = NULL; | |
7347 | } | |
d46c5b12 | 7348 | } |
1397dc18 | 7349 | |
d46c5b12 KH |
7350 | return Qnil; |
7351 | } | |
7352 | ||
66cfb530 KH |
7353 | DEFUN ("set-coding-priority-internal", Fset_coding_priority_internal, |
7354 | Sset_coding_priority_internal, 0, 0, 0, | |
48b0f3ae PJ |
7355 | doc: /* Update internal database for the current value of `coding-category-list'. |
7356 | This function is internal use only. */) | |
7357 | () | |
66cfb530 KH |
7358 | { |
7359 | int i = 0, idx; | |
84d60297 RS |
7360 | Lisp_Object val; |
7361 | ||
7362 | val = Vcoding_category_list; | |
66cfb530 KH |
7363 | |
7364 | while (CONSP (val) && i < CODING_CATEGORY_IDX_MAX) | |
7365 | { | |
03699b14 | 7366 | if (! SYMBOLP (XCAR (val))) |
66cfb530 | 7367 | break; |
03699b14 | 7368 | idx = XFASTINT (Fget (XCAR (val), Qcoding_category_index)); |
66cfb530 KH |
7369 | if (idx >= CODING_CATEGORY_IDX_MAX) |
7370 | break; | |
7371 | coding_priorities[i++] = (1 << idx); | |
03699b14 | 7372 | val = XCDR (val); |
66cfb530 KH |
7373 | } |
7374 | /* If coding-category-list is valid and contains all coding | |
7375 | categories, `i' should be CODING_CATEGORY_IDX_MAX now. If not, | |
fa42c37f | 7376 | the following code saves Emacs from crashing. */ |
66cfb530 KH |
7377 | while (i < CODING_CATEGORY_IDX_MAX) |
7378 | coding_priorities[i++] = CODING_CATEGORY_MASK_RAW_TEXT; | |
7379 | ||
7380 | return Qnil; | |
7381 | } | |
7382 | ||
6b89e3aa KH |
7383 | DEFUN ("define-coding-system-internal", Fdefine_coding_system_internal, |
7384 | Sdefine_coding_system_internal, 1, 1, 0, | |
7385 | doc: /* Register CODING-SYSTEM as a base coding system. | |
7386 | This function is internal use only. */) | |
7387 | (coding_system) | |
7388 | Lisp_Object coding_system; | |
7389 | { | |
7390 | Lisp_Object safe_chars, slot; | |
7391 | ||
7392 | if (NILP (Fcheck_coding_system (coding_system))) | |
7393 | Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil)); | |
7394 | safe_chars = coding_safe_chars (coding_system); | |
7395 | if (! EQ (safe_chars, Qt) && ! CHAR_TABLE_P (safe_chars)) | |
7396 | error ("No valid safe-chars property for %s", | |
7397 | SDATA (SYMBOL_NAME (coding_system))); | |
7398 | if (EQ (safe_chars, Qt)) | |
7399 | { | |
7400 | if (NILP (Fmemq (coding_system, XCAR (Vcoding_system_safe_chars)))) | |
7401 | XSETCAR (Vcoding_system_safe_chars, | |
7402 | Fcons (coding_system, XCAR (Vcoding_system_safe_chars))); | |
7403 | } | |
7404 | else | |
7405 | { | |
7406 | slot = Fassq (coding_system, XCDR (Vcoding_system_safe_chars)); | |
7407 | if (NILP (slot)) | |
7408 | XSETCDR (Vcoding_system_safe_chars, | |
7409 | nconc2 (XCDR (Vcoding_system_safe_chars), | |
7410 | Fcons (Fcons (coding_system, safe_chars), Qnil))); | |
7411 | else | |
7412 | XSETCDR (slot, safe_chars); | |
7413 | } | |
7414 | return Qnil; | |
7415 | } | |
7416 | ||
4ed46869 KH |
7417 | #endif /* emacs */ |
7418 | ||
7419 | \f | |
1397dc18 | 7420 | /*** 9. Post-amble ***/ |
4ed46869 | 7421 | |
dfcf069d | 7422 | void |
4ed46869 KH |
7423 | init_coding_once () |
7424 | { | |
7425 | int i; | |
7426 | ||
93dec019 | 7427 | /* Emacs' internal format specific initialize routine. */ |
4ed46869 KH |
7428 | for (i = 0; i <= 0x20; i++) |
7429 | emacs_code_class[i] = EMACS_control_code; | |
7430 | emacs_code_class[0x0A] = EMACS_linefeed_code; | |
7431 | emacs_code_class[0x0D] = EMACS_carriage_return_code; | |
7432 | for (i = 0x21 ; i < 0x7F; i++) | |
7433 | emacs_code_class[i] = EMACS_ascii_code; | |
7434 | emacs_code_class[0x7F] = EMACS_control_code; | |
ec6d2bb8 | 7435 | for (i = 0x80; i < 0xFF; i++) |
4ed46869 KH |
7436 | emacs_code_class[i] = EMACS_invalid_code; |
7437 | emacs_code_class[LEADING_CODE_PRIVATE_11] = EMACS_leading_code_3; | |
7438 | emacs_code_class[LEADING_CODE_PRIVATE_12] = EMACS_leading_code_3; | |
7439 | emacs_code_class[LEADING_CODE_PRIVATE_21] = EMACS_leading_code_4; | |
7440 | emacs_code_class[LEADING_CODE_PRIVATE_22] = EMACS_leading_code_4; | |
7441 | ||
7442 | /* ISO2022 specific initialize routine. */ | |
7443 | for (i = 0; i < 0x20; i++) | |
b73bfc1c | 7444 | iso_code_class[i] = ISO_control_0; |
4ed46869 KH |
7445 | for (i = 0x21; i < 0x7F; i++) |
7446 | iso_code_class[i] = ISO_graphic_plane_0; | |
7447 | for (i = 0x80; i < 0xA0; i++) | |
b73bfc1c | 7448 | iso_code_class[i] = ISO_control_1; |
4ed46869 KH |
7449 | for (i = 0xA1; i < 0xFF; i++) |
7450 | iso_code_class[i] = ISO_graphic_plane_1; | |
7451 | iso_code_class[0x20] = iso_code_class[0x7F] = ISO_0x20_or_0x7F; | |
7452 | iso_code_class[0xA0] = iso_code_class[0xFF] = ISO_0xA0_or_0xFF; | |
7453 | iso_code_class[ISO_CODE_CR] = ISO_carriage_return; | |
7454 | iso_code_class[ISO_CODE_SO] = ISO_shift_out; | |
7455 | iso_code_class[ISO_CODE_SI] = ISO_shift_in; | |
7456 | iso_code_class[ISO_CODE_SS2_7] = ISO_single_shift_2_7; | |
7457 | iso_code_class[ISO_CODE_ESC] = ISO_escape; | |
7458 | iso_code_class[ISO_CODE_SS2] = ISO_single_shift_2; | |
7459 | iso_code_class[ISO_CODE_SS3] = ISO_single_shift_3; | |
7460 | iso_code_class[ISO_CODE_CSI] = ISO_control_sequence_introducer; | |
7461 | ||
e0e989f6 KH |
7462 | setup_coding_system (Qnil, &keyboard_coding); |
7463 | setup_coding_system (Qnil, &terminal_coding); | |
c4825358 | 7464 | setup_coding_system (Qnil, &safe_terminal_coding); |
6bc51348 | 7465 | setup_coding_system (Qnil, &default_buffer_file_coding); |
9ce27fde | 7466 | |
d46c5b12 KH |
7467 | bzero (coding_system_table, sizeof coding_system_table); |
7468 | ||
66cfb530 KH |
7469 | bzero (ascii_skip_code, sizeof ascii_skip_code); |
7470 | for (i = 0; i < 128; i++) | |
7471 | ascii_skip_code[i] = 1; | |
7472 | ||
9ce27fde KH |
7473 | #if defined (MSDOS) || defined (WINDOWSNT) |
7474 | system_eol_type = CODING_EOL_CRLF; | |
7475 | #else | |
7476 | system_eol_type = CODING_EOL_LF; | |
7477 | #endif | |
b843d1ae KH |
7478 | |
7479 | inhibit_pre_post_conversion = 0; | |
e0e989f6 KH |
7480 | } |
7481 | ||
7482 | #ifdef emacs | |
7483 | ||
dfcf069d | 7484 | void |
e0e989f6 KH |
7485 | syms_of_coding () |
7486 | { | |
7487 | Qtarget_idx = intern ("target-idx"); | |
7488 | staticpro (&Qtarget_idx); | |
7489 | ||
bb0115a2 RS |
7490 | Qcoding_system_history = intern ("coding-system-history"); |
7491 | staticpro (&Qcoding_system_history); | |
7492 | Fset (Qcoding_system_history, Qnil); | |
7493 | ||
9ce27fde | 7494 | /* Target FILENAME is the first argument. */ |
e0e989f6 | 7495 | Fput (Qinsert_file_contents, Qtarget_idx, make_number (0)); |
9ce27fde | 7496 | /* Target FILENAME is the third argument. */ |
e0e989f6 KH |
7497 | Fput (Qwrite_region, Qtarget_idx, make_number (2)); |
7498 | ||
7499 | Qcall_process = intern ("call-process"); | |
7500 | staticpro (&Qcall_process); | |
9ce27fde | 7501 | /* Target PROGRAM is the first argument. */ |
e0e989f6 KH |
7502 | Fput (Qcall_process, Qtarget_idx, make_number (0)); |
7503 | ||
7504 | Qcall_process_region = intern ("call-process-region"); | |
7505 | staticpro (&Qcall_process_region); | |
9ce27fde | 7506 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
7507 | Fput (Qcall_process_region, Qtarget_idx, make_number (2)); |
7508 | ||
7509 | Qstart_process = intern ("start-process"); | |
7510 | staticpro (&Qstart_process); | |
9ce27fde | 7511 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
7512 | Fput (Qstart_process, Qtarget_idx, make_number (2)); |
7513 | ||
7514 | Qopen_network_stream = intern ("open-network-stream"); | |
7515 | staticpro (&Qopen_network_stream); | |
9ce27fde | 7516 | /* Target SERVICE is the fourth argument. */ |
e0e989f6 KH |
7517 | Fput (Qopen_network_stream, Qtarget_idx, make_number (3)); |
7518 | ||
4ed46869 KH |
7519 | Qcoding_system = intern ("coding-system"); |
7520 | staticpro (&Qcoding_system); | |
7521 | ||
7522 | Qeol_type = intern ("eol-type"); | |
7523 | staticpro (&Qeol_type); | |
7524 | ||
7525 | Qbuffer_file_coding_system = intern ("buffer-file-coding-system"); | |
7526 | staticpro (&Qbuffer_file_coding_system); | |
7527 | ||
7528 | Qpost_read_conversion = intern ("post-read-conversion"); | |
7529 | staticpro (&Qpost_read_conversion); | |
7530 | ||
7531 | Qpre_write_conversion = intern ("pre-write-conversion"); | |
7532 | staticpro (&Qpre_write_conversion); | |
7533 | ||
27901516 KH |
7534 | Qno_conversion = intern ("no-conversion"); |
7535 | staticpro (&Qno_conversion); | |
7536 | ||
7537 | Qundecided = intern ("undecided"); | |
7538 | staticpro (&Qundecided); | |
7539 | ||
4ed46869 KH |
7540 | Qcoding_system_p = intern ("coding-system-p"); |
7541 | staticpro (&Qcoding_system_p); | |
7542 | ||
7543 | Qcoding_system_error = intern ("coding-system-error"); | |
7544 | staticpro (&Qcoding_system_error); | |
7545 | ||
7546 | Fput (Qcoding_system_error, Qerror_conditions, | |
7547 | Fcons (Qcoding_system_error, Fcons (Qerror, Qnil))); | |
7548 | Fput (Qcoding_system_error, Qerror_message, | |
9ce27fde | 7549 | build_string ("Invalid coding system")); |
4ed46869 | 7550 | |
d46c5b12 KH |
7551 | Qcoding_category = intern ("coding-category"); |
7552 | staticpro (&Qcoding_category); | |
4ed46869 KH |
7553 | Qcoding_category_index = intern ("coding-category-index"); |
7554 | staticpro (&Qcoding_category_index); | |
7555 | ||
d46c5b12 KH |
7556 | Vcoding_category_table |
7557 | = Fmake_vector (make_number (CODING_CATEGORY_IDX_MAX), Qnil); | |
7558 | staticpro (&Vcoding_category_table); | |
4ed46869 KH |
7559 | { |
7560 | int i; | |
7561 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
7562 | { | |
d46c5b12 KH |
7563 | XVECTOR (Vcoding_category_table)->contents[i] |
7564 | = intern (coding_category_name[i]); | |
7565 | Fput (XVECTOR (Vcoding_category_table)->contents[i], | |
7566 | Qcoding_category_index, make_number (i)); | |
4ed46869 KH |
7567 | } |
7568 | } | |
7569 | ||
6b89e3aa KH |
7570 | Vcoding_system_safe_chars = Fcons (Qnil, Qnil); |
7571 | staticpro (&Vcoding_system_safe_chars); | |
7572 | ||
f967223b KH |
7573 | Qtranslation_table = intern ("translation-table"); |
7574 | staticpro (&Qtranslation_table); | |
b666620c | 7575 | Fput (Qtranslation_table, Qchar_table_extra_slots, make_number (2)); |
bdd9fb48 | 7576 | |
f967223b KH |
7577 | Qtranslation_table_id = intern ("translation-table-id"); |
7578 | staticpro (&Qtranslation_table_id); | |
84fbb8a0 | 7579 | |
f967223b KH |
7580 | Qtranslation_table_for_decode = intern ("translation-table-for-decode"); |
7581 | staticpro (&Qtranslation_table_for_decode); | |
a5d301df | 7582 | |
f967223b KH |
7583 | Qtranslation_table_for_encode = intern ("translation-table-for-encode"); |
7584 | staticpro (&Qtranslation_table_for_encode); | |
a5d301df | 7585 | |
05e6f5dc KH |
7586 | Qsafe_chars = intern ("safe-chars"); |
7587 | staticpro (&Qsafe_chars); | |
7588 | ||
7589 | Qchar_coding_system = intern ("char-coding-system"); | |
7590 | staticpro (&Qchar_coding_system); | |
7591 | ||
7592 | /* Intern this now in case it isn't already done. | |
7593 | Setting this variable twice is harmless. | |
7594 | But don't staticpro it here--that is done in alloc.c. */ | |
7595 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
7596 | Fput (Qsafe_chars, Qchar_table_extra_slots, make_number (0)); | |
067a6a66 | 7597 | Fput (Qchar_coding_system, Qchar_table_extra_slots, make_number (0)); |
70c22245 | 7598 | |
1397dc18 KH |
7599 | Qvalid_codes = intern ("valid-codes"); |
7600 | staticpro (&Qvalid_codes); | |
7601 | ||
9ce27fde KH |
7602 | Qemacs_mule = intern ("emacs-mule"); |
7603 | staticpro (&Qemacs_mule); | |
7604 | ||
d46c5b12 KH |
7605 | Qraw_text = intern ("raw-text"); |
7606 | staticpro (&Qraw_text); | |
7607 | ||
ecf488bc DL |
7608 | Qutf_8 = intern ("utf-8"); |
7609 | staticpro (&Qutf_8); | |
7610 | ||
a362520d KH |
7611 | Qcoding_system_define_form = intern ("coding-system-define-form"); |
7612 | staticpro (&Qcoding_system_define_form); | |
7613 | ||
4ed46869 KH |
7614 | defsubr (&Scoding_system_p); |
7615 | defsubr (&Sread_coding_system); | |
7616 | defsubr (&Sread_non_nil_coding_system); | |
7617 | defsubr (&Scheck_coding_system); | |
7618 | defsubr (&Sdetect_coding_region); | |
d46c5b12 | 7619 | defsubr (&Sdetect_coding_string); |
05e6f5dc | 7620 | defsubr (&Sfind_coding_systems_region_internal); |
068a9dbd | 7621 | defsubr (&Sunencodable_char_position); |
4ed46869 KH |
7622 | defsubr (&Sdecode_coding_region); |
7623 | defsubr (&Sencode_coding_region); | |
7624 | defsubr (&Sdecode_coding_string); | |
7625 | defsubr (&Sencode_coding_string); | |
7626 | defsubr (&Sdecode_sjis_char); | |
7627 | defsubr (&Sencode_sjis_char); | |
7628 | defsubr (&Sdecode_big5_char); | |
7629 | defsubr (&Sencode_big5_char); | |
1ba9e4ab | 7630 | defsubr (&Sset_terminal_coding_system_internal); |
c4825358 | 7631 | defsubr (&Sset_safe_terminal_coding_system_internal); |
4ed46869 | 7632 | defsubr (&Sterminal_coding_system); |
1ba9e4ab | 7633 | defsubr (&Sset_keyboard_coding_system_internal); |
4ed46869 | 7634 | defsubr (&Skeyboard_coding_system); |
a5d301df | 7635 | defsubr (&Sfind_operation_coding_system); |
1397dc18 | 7636 | defsubr (&Supdate_coding_systems_internal); |
66cfb530 | 7637 | defsubr (&Sset_coding_priority_internal); |
6b89e3aa | 7638 | defsubr (&Sdefine_coding_system_internal); |
4ed46869 | 7639 | |
4608c386 | 7640 | DEFVAR_LISP ("coding-system-list", &Vcoding_system_list, |
48b0f3ae PJ |
7641 | doc: /* List of coding systems. |
7642 | ||
7643 | Do not alter the value of this variable manually. This variable should be | |
7644 | updated by the functions `make-coding-system' and | |
7645 | `define-coding-system-alias'. */); | |
4608c386 KH |
7646 | Vcoding_system_list = Qnil; |
7647 | ||
7648 | DEFVAR_LISP ("coding-system-alist", &Vcoding_system_alist, | |
48b0f3ae PJ |
7649 | doc: /* Alist of coding system names. |
7650 | Each element is one element list of coding system name. | |
7651 | This variable is given to `completing-read' as TABLE argument. | |
7652 | ||
7653 | Do not alter the value of this variable manually. This variable should be | |
7654 | updated by the functions `make-coding-system' and | |
7655 | `define-coding-system-alias'. */); | |
4608c386 KH |
7656 | Vcoding_system_alist = Qnil; |
7657 | ||
4ed46869 | 7658 | DEFVAR_LISP ("coding-category-list", &Vcoding_category_list, |
48b0f3ae PJ |
7659 | doc: /* List of coding-categories (symbols) ordered by priority. |
7660 | ||
7661 | On detecting a coding system, Emacs tries code detection algorithms | |
7662 | associated with each coding-category one by one in this order. When | |
7663 | one algorithm agrees with a byte sequence of source text, the coding | |
7664 | system bound to the corresponding coding-category is selected. */); | |
4ed46869 KH |
7665 | { |
7666 | int i; | |
7667 | ||
7668 | Vcoding_category_list = Qnil; | |
7669 | for (i = CODING_CATEGORY_IDX_MAX - 1; i >= 0; i--) | |
7670 | Vcoding_category_list | |
d46c5b12 KH |
7671 | = Fcons (XVECTOR (Vcoding_category_table)->contents[i], |
7672 | Vcoding_category_list); | |
4ed46869 KH |
7673 | } |
7674 | ||
7675 | DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read, | |
48b0f3ae PJ |
7676 | doc: /* Specify the coding system for read operations. |
7677 | It is useful to bind this variable with `let', but do not set it globally. | |
7678 | If the value is a coding system, it is used for decoding on read operation. | |
7679 | If not, an appropriate element is used from one of the coding system alists: | |
7680 | There are three such tables, `file-coding-system-alist', | |
7681 | `process-coding-system-alist', and `network-coding-system-alist'. */); | |
4ed46869 KH |
7682 | Vcoding_system_for_read = Qnil; |
7683 | ||
7684 | DEFVAR_LISP ("coding-system-for-write", &Vcoding_system_for_write, | |
48b0f3ae PJ |
7685 | doc: /* Specify the coding system for write operations. |
7686 | Programs bind this variable with `let', but you should not set it globally. | |
7687 | If the value is a coding system, it is used for encoding of output, | |
7688 | when writing it to a file and when sending it to a file or subprocess. | |
7689 | ||
7690 | If this does not specify a coding system, an appropriate element | |
7691 | is used from one of the coding system alists: | |
7692 | There are three such tables, `file-coding-system-alist', | |
7693 | `process-coding-system-alist', and `network-coding-system-alist'. | |
7694 | For output to files, if the above procedure does not specify a coding system, | |
7695 | the value of `buffer-file-coding-system' is used. */); | |
4ed46869 KH |
7696 | Vcoding_system_for_write = Qnil; |
7697 | ||
7698 | DEFVAR_LISP ("last-coding-system-used", &Vlast_coding_system_used, | |
7c695ab9 DL |
7699 | doc: /* Coding system used in the latest file or process I/O. |
7700 | Also set by `encode-coding-region', `decode-coding-region', | |
7701 | `encode-coding-string' and `decode-coding-string'. */); | |
4ed46869 KH |
7702 | Vlast_coding_system_used = Qnil; |
7703 | ||
9ce27fde | 7704 | DEFVAR_BOOL ("inhibit-eol-conversion", &inhibit_eol_conversion, |
48b0f3ae PJ |
7705 | doc: /* *Non-nil means always inhibit code conversion of end-of-line format. |
7706 | See info node `Coding Systems' and info node `Text and Binary' concerning | |
7707 | such conversion. */); | |
9ce27fde KH |
7708 | inhibit_eol_conversion = 0; |
7709 | ||
ed29121d | 7710 | DEFVAR_BOOL ("inherit-process-coding-system", &inherit_process_coding_system, |
48b0f3ae PJ |
7711 | doc: /* Non-nil means process buffer inherits coding system of process output. |
7712 | Bind it to t if the process output is to be treated as if it were a file | |
7713 | read from some filesystem. */); | |
ed29121d EZ |
7714 | inherit_process_coding_system = 0; |
7715 | ||
02ba4723 | 7716 | DEFVAR_LISP ("file-coding-system-alist", &Vfile_coding_system_alist, |
48b0f3ae PJ |
7717 | doc: /* Alist to decide a coding system to use for a file I/O operation. |
7718 | The format is ((PATTERN . VAL) ...), | |
7719 | where PATTERN is a regular expression matching a file name, | |
7720 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
7721 | If VAL is a coding system, it is used for both decoding and encoding | |
7722 | the file contents. | |
7723 | If VAL is a cons of coding systems, the car part is used for decoding, | |
7724 | and the cdr part is used for encoding. | |
7725 | If VAL is a function symbol, the function must return a coding system | |
0192762c | 7726 | or a cons of coding systems which are used as above. The function gets |
ff955d90 | 7727 | the arguments with which `find-operation-coding-system' was called. |
48b0f3ae PJ |
7728 | |
7729 | See also the function `find-operation-coding-system' | |
7730 | and the variable `auto-coding-alist'. */); | |
02ba4723 KH |
7731 | Vfile_coding_system_alist = Qnil; |
7732 | ||
7733 | DEFVAR_LISP ("process-coding-system-alist", &Vprocess_coding_system_alist, | |
48b0f3ae PJ |
7734 | doc: /* Alist to decide a coding system to use for a process I/O operation. |
7735 | The format is ((PATTERN . VAL) ...), | |
7736 | where PATTERN is a regular expression matching a program name, | |
7737 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
7738 | If VAL is a coding system, it is used for both decoding what received | |
7739 | from the program and encoding what sent to the program. | |
7740 | If VAL is a cons of coding systems, the car part is used for decoding, | |
7741 | and the cdr part is used for encoding. | |
7742 | If VAL is a function symbol, the function must return a coding system | |
7743 | or a cons of coding systems which are used as above. | |
7744 | ||
7745 | See also the function `find-operation-coding-system'. */); | |
02ba4723 KH |
7746 | Vprocess_coding_system_alist = Qnil; |
7747 | ||
7748 | DEFVAR_LISP ("network-coding-system-alist", &Vnetwork_coding_system_alist, | |
48b0f3ae PJ |
7749 | doc: /* Alist to decide a coding system to use for a network I/O operation. |
7750 | The format is ((PATTERN . VAL) ...), | |
7751 | where PATTERN is a regular expression matching a network service name | |
7752 | or is a port number to connect to, | |
7753 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
7754 | If VAL is a coding system, it is used for both decoding what received | |
7755 | from the network stream and encoding what sent to the network stream. | |
7756 | If VAL is a cons of coding systems, the car part is used for decoding, | |
7757 | and the cdr part is used for encoding. | |
7758 | If VAL is a function symbol, the function must return a coding system | |
7759 | or a cons of coding systems which are used as above. | |
7760 | ||
7761 | See also the function `find-operation-coding-system'. */); | |
02ba4723 | 7762 | Vnetwork_coding_system_alist = Qnil; |
4ed46869 | 7763 | |
68c45bf0 | 7764 | DEFVAR_LISP ("locale-coding-system", &Vlocale_coding_system, |
75205970 RS |
7765 | doc: /* Coding system to use with system messages. |
7766 | Also used for decoding keyboard input on X Window system. */); | |
68c45bf0 PE |
7767 | Vlocale_coding_system = Qnil; |
7768 | ||
005f0d35 | 7769 | /* The eol mnemonics are reset in startup.el system-dependently. */ |
7722baf9 | 7770 | DEFVAR_LISP ("eol-mnemonic-unix", &eol_mnemonic_unix, |
48b0f3ae | 7771 | doc: /* *String displayed in mode line for UNIX-like (LF) end-of-line format. */); |
7722baf9 | 7772 | eol_mnemonic_unix = build_string (":"); |
4ed46869 | 7773 | |
7722baf9 | 7774 | DEFVAR_LISP ("eol-mnemonic-dos", &eol_mnemonic_dos, |
48b0f3ae | 7775 | doc: /* *String displayed in mode line for DOS-like (CRLF) end-of-line format. */); |
7722baf9 | 7776 | eol_mnemonic_dos = build_string ("\\"); |
4ed46869 | 7777 | |
7722baf9 | 7778 | DEFVAR_LISP ("eol-mnemonic-mac", &eol_mnemonic_mac, |
48b0f3ae | 7779 | doc: /* *String displayed in mode line for MAC-like (CR) end-of-line format. */); |
7722baf9 | 7780 | eol_mnemonic_mac = build_string ("/"); |
4ed46869 | 7781 | |
7722baf9 | 7782 | DEFVAR_LISP ("eol-mnemonic-undecided", &eol_mnemonic_undecided, |
48b0f3ae | 7783 | doc: /* *String displayed in mode line when end-of-line format is not yet determined. */); |
7722baf9 | 7784 | eol_mnemonic_undecided = build_string (":"); |
4ed46869 | 7785 | |
84fbb8a0 | 7786 | DEFVAR_LISP ("enable-character-translation", &Venable_character_translation, |
48b0f3ae | 7787 | doc: /* *Non-nil enables character translation while encoding and decoding. */); |
84fbb8a0 | 7788 | Venable_character_translation = Qt; |
bdd9fb48 | 7789 | |
f967223b | 7790 | DEFVAR_LISP ("standard-translation-table-for-decode", |
48b0f3ae PJ |
7791 | &Vstandard_translation_table_for_decode, |
7792 | doc: /* Table for translating characters while decoding. */); | |
f967223b | 7793 | Vstandard_translation_table_for_decode = Qnil; |
bdd9fb48 | 7794 | |
f967223b | 7795 | DEFVAR_LISP ("standard-translation-table-for-encode", |
48b0f3ae PJ |
7796 | &Vstandard_translation_table_for_encode, |
7797 | doc: /* Table for translating characters while encoding. */); | |
f967223b | 7798 | Vstandard_translation_table_for_encode = Qnil; |
4ed46869 KH |
7799 | |
7800 | DEFVAR_LISP ("charset-revision-table", &Vcharset_revision_alist, | |
48b0f3ae PJ |
7801 | doc: /* Alist of charsets vs revision numbers. |
7802 | While encoding, if a charset (car part of an element) is found, | |
7803 | designate it with the escape sequence identifying revision (cdr part of the element). */); | |
4ed46869 | 7804 | Vcharset_revision_alist = Qnil; |
02ba4723 KH |
7805 | |
7806 | DEFVAR_LISP ("default-process-coding-system", | |
7807 | &Vdefault_process_coding_system, | |
48b0f3ae PJ |
7808 | doc: /* Cons of coding systems used for process I/O by default. |
7809 | The car part is used for decoding a process output, | |
7810 | the cdr part is used for encoding a text to be sent to a process. */); | |
02ba4723 | 7811 | Vdefault_process_coding_system = Qnil; |
c4825358 | 7812 | |
3f003981 | 7813 | DEFVAR_LISP ("latin-extra-code-table", &Vlatin_extra_code_table, |
48b0f3ae PJ |
7814 | doc: /* Table of extra Latin codes in the range 128..159 (inclusive). |
7815 | This is a vector of length 256. | |
7816 | If Nth element is non-nil, the existence of code N in a file | |
7817 | \(or output of subprocess) doesn't prevent it to be detected as | |
7818 | a coding system of ISO 2022 variant which has a flag | |
7819 | `accept-latin-extra-code' t (e.g. iso-latin-1) on reading a file | |
7820 | or reading output of a subprocess. | |
7821 | Only 128th through 159th elements has a meaning. */); | |
3f003981 | 7822 | Vlatin_extra_code_table = Fmake_vector (make_number (256), Qnil); |
d46c5b12 KH |
7823 | |
7824 | DEFVAR_LISP ("select-safe-coding-system-function", | |
7825 | &Vselect_safe_coding_system_function, | |
48b0f3ae PJ |
7826 | doc: /* Function to call to select safe coding system for encoding a text. |
7827 | ||
7828 | If set, this function is called to force a user to select a proper | |
7829 | coding system which can encode the text in the case that a default | |
7830 | coding system used in each operation can't encode the text. | |
7831 | ||
7832 | The default value is `select-safe-coding-system' (which see). */); | |
d46c5b12 KH |
7833 | Vselect_safe_coding_system_function = Qnil; |
7834 | ||
5d5bf4d8 KH |
7835 | DEFVAR_BOOL ("coding-system-require-warning", |
7836 | &coding_system_require_warning, | |
7837 | doc: /* Internal use only. | |
6b89e3aa KH |
7838 | If non-nil, on writing a file, `select-safe-coding-system-function' is |
7839 | called even if `coding-system-for-write' is non-nil. The command | |
7840 | `universal-coding-system-argument' binds this variable to t temporarily. */); | |
5d5bf4d8 KH |
7841 | coding_system_require_warning = 0; |
7842 | ||
7843 | ||
22ab2303 | 7844 | DEFVAR_BOOL ("inhibit-iso-escape-detection", |
74383408 | 7845 | &inhibit_iso_escape_detection, |
48b0f3ae PJ |
7846 | doc: /* If non-nil, Emacs ignores ISO2022's escape sequence on code detection. |
7847 | ||
7848 | By default, on reading a file, Emacs tries to detect how the text is | |
7849 | encoded. This code detection is sensitive to escape sequences. If | |
7850 | the sequence is valid as ISO2022, the code is determined as one of | |
7851 | the ISO2022 encodings, and the file is decoded by the corresponding | |
7852 | coding system (e.g. `iso-2022-7bit'). | |
7853 | ||
7854 | However, there may be a case that you want to read escape sequences in | |
7855 | a file as is. In such a case, you can set this variable to non-nil. | |
7856 | Then, as the code detection ignores any escape sequences, no file is | |
7857 | detected as encoded in some ISO2022 encoding. The result is that all | |
7858 | escape sequences become visible in a buffer. | |
7859 | ||
7860 | The default value is nil, and it is strongly recommended not to change | |
7861 | it. That is because many Emacs Lisp source files that contain | |
7862 | non-ASCII characters are encoded by the coding system `iso-2022-7bit' | |
7863 | in Emacs's distribution, and they won't be decoded correctly on | |
7864 | reading if you suppress escape sequence detection. | |
7865 | ||
7866 | The other way to read escape sequences in a file without decoding is | |
7867 | to explicitly specify some coding system that doesn't use ISO2022's | |
7868 | escape sequence (e.g `latin-1') on reading by \\[universal-coding-system-argument]. */); | |
74383408 | 7869 | inhibit_iso_escape_detection = 0; |
002fdb44 DL |
7870 | |
7871 | DEFVAR_LISP ("translation-table-for-input", &Vtranslation_table_for_input, | |
15c8f9d1 DL |
7872 | doc: /* Char table for translating self-inserting characters. |
7873 | This is applied to the result of input methods, not their input. See also | |
7874 | `keyboard-translate-table'. */); | |
002fdb44 | 7875 | Vtranslation_table_for_input = Qnil; |
4ed46869 KH |
7876 | } |
7877 | ||
68c45bf0 PE |
7878 | char * |
7879 | emacs_strerror (error_number) | |
7880 | int error_number; | |
7881 | { | |
7882 | char *str; | |
7883 | ||
ca9c0567 | 7884 | synchronize_system_messages_locale (); |
68c45bf0 PE |
7885 | str = strerror (error_number); |
7886 | ||
7887 | if (! NILP (Vlocale_coding_system)) | |
7888 | { | |
7889 | Lisp_Object dec = code_convert_string_norecord (build_string (str), | |
7890 | Vlocale_coding_system, | |
7891 | 0); | |
d5db4077 | 7892 | str = (char *) SDATA (dec); |
68c45bf0 PE |
7893 | } |
7894 | ||
7895 | return str; | |
7896 | } | |
7897 | ||
4ed46869 | 7898 | #endif /* emacs */ |
c2f94ebc | 7899 | |
ab5796a9 MB |
7900 | /* arch-tag: 3a3a2b01-5ff6-4071-9afe-f5b808d9229d |
7901 | (do not change this comment) */ |