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4ed46869 | 1 | /* Coding system handler (conversion, detection, and etc). |
4a2f9c6a | 2 | Copyright (C) 1995, 1997, 1998 Electrotechnical Laboratory, JAPAN. |
203cb916 | 3 | Licensed to the Free Software Foundation. |
4ed46869 | 4 | |
369314dc KH |
5 | This file is part of GNU Emacs. |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
4ed46869 | 11 | |
369314dc KH |
12 | GNU Emacs is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
4ed46869 | 16 | |
369314dc KH |
17 | You should have received a copy of the GNU General Public License |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
4ed46869 KH |
21 | |
22 | /*** TABLE OF CONTENTS *** | |
23 | ||
b73bfc1c | 24 | 0. General comments |
4ed46869 | 25 | 1. Preamble |
0ef69138 | 26 | 2. Emacs' internal format (emacs-mule) handlers |
4ed46869 KH |
27 | 3. ISO2022 handlers |
28 | 4. Shift-JIS and BIG5 handlers | |
1397dc18 KH |
29 | 5. CCL handlers |
30 | 6. End-of-line handlers | |
31 | 7. C library functions | |
32 | 8. Emacs Lisp library functions | |
33 | 9. Post-amble | |
4ed46869 KH |
34 | |
35 | */ | |
36 | ||
b73bfc1c KH |
37 | /*** 0. General comments ***/ |
38 | ||
39 | ||
cfb43547 | 40 | /*** GENERAL NOTE on CODING SYSTEMS *** |
4ed46869 | 41 | |
cfb43547 | 42 | A coding system is an encoding mechanism for one or more character |
4ed46869 KH |
43 | sets. Here's a list of coding systems which Emacs can handle. When |
44 | we say "decode", it means converting some other coding system to | |
cfb43547 | 45 | Emacs' internal format (emacs-mule), and when we say "encode", |
0ef69138 KH |
46 | it means converting the coding system emacs-mule to some other |
47 | coding system. | |
4ed46869 | 48 | |
0ef69138 | 49 | 0. Emacs' internal format (emacs-mule) |
4ed46869 | 50 | |
cfb43547 | 51 | Emacs itself holds a multi-lingual character in buffers and strings |
f4dee582 | 52 | in a special format. Details are described in section 2. |
4ed46869 KH |
53 | |
54 | 1. ISO2022 | |
55 | ||
56 | The most famous coding system for multiple character sets. X's | |
f4dee582 RS |
57 | Compound Text, various EUCs (Extended Unix Code), and coding |
58 | systems used in Internet communication such as ISO-2022-JP are | |
59 | all variants of ISO2022. Details are described in section 3. | |
4ed46869 KH |
60 | |
61 | 2. SJIS (or Shift-JIS or MS-Kanji-Code) | |
62 | ||
63 | A coding system to encode character sets: ASCII, JISX0201, and | |
64 | JISX0208. Widely used for PC's in Japan. Details are described in | |
f4dee582 | 65 | section 4. |
4ed46869 KH |
66 | |
67 | 3. BIG5 | |
68 | ||
cfb43547 DL |
69 | A coding system to encode the character sets ASCII and Big5. Widely |
70 | used for Chinese (mainly in Taiwan and Hong Kong). Details are | |
f4dee582 RS |
71 | described in section 4. In this file, when we write "BIG5" |
72 | (all uppercase), we mean the coding system, and when we write | |
73 | "Big5" (capitalized), we mean the character set. | |
4ed46869 | 74 | |
27901516 KH |
75 | 4. Raw text |
76 | ||
cfb43547 DL |
77 | A coding system for text containing random 8-bit code. Emacs does |
78 | no code conversion on such text except for end-of-line format. | |
27901516 KH |
79 | |
80 | 5. Other | |
4ed46869 | 81 | |
cfb43547 DL |
82 | If a user wants to read/write text encoded in a coding system not |
83 | listed above, he can supply a decoder and an encoder for it as CCL | |
4ed46869 KH |
84 | (Code Conversion Language) programs. Emacs executes the CCL program |
85 | while reading/writing. | |
86 | ||
d46c5b12 KH |
87 | Emacs represents a coding system by a Lisp symbol that has a property |
88 | `coding-system'. But, before actually using the coding system, the | |
4ed46869 | 89 | information about it is set in a structure of type `struct |
f4dee582 | 90 | coding_system' for rapid processing. See section 6 for more details. |
4ed46869 KH |
91 | |
92 | */ | |
93 | ||
94 | /*** GENERAL NOTES on END-OF-LINE FORMAT *** | |
95 | ||
cfb43547 DL |
96 | How end-of-line of text is encoded depends on the operating system. |
97 | For instance, Unix's format is just one byte of `line-feed' code, | |
f4dee582 | 98 | whereas DOS's format is two-byte sequence of `carriage-return' and |
d46c5b12 KH |
99 | `line-feed' codes. MacOS's format is usually one byte of |
100 | `carriage-return'. | |
4ed46869 | 101 | |
cfb43547 DL |
102 | Since text character encoding and end-of-line encoding are |
103 | independent, any coding system described above can have any | |
104 | end-of-line format. So Emacs has information about end-of-line | |
105 | format in each coding-system. See section 6 for more details. | |
4ed46869 KH |
106 | |
107 | */ | |
108 | ||
109 | /*** GENERAL NOTES on `detect_coding_XXX ()' functions *** | |
110 | ||
111 | These functions check if a text between SRC and SRC_END is encoded | |
112 | in the coding system category XXX. Each returns an integer value in | |
cfb43547 | 113 | which appropriate flag bits for the category XXX are set. The flag |
4ed46869 | 114 | bits are defined in macros CODING_CATEGORY_MASK_XXX. Below is the |
cfb43547 | 115 | template for these functions. If MULTIBYTEP is nonzero, 8-bit codes |
0a28aafb | 116 | of the range 0x80..0x9F are in multibyte form. */ |
4ed46869 KH |
117 | #if 0 |
118 | int | |
0a28aafb | 119 | detect_coding_emacs_mule (src, src_end, multibytep) |
4ed46869 | 120 | unsigned char *src, *src_end; |
0a28aafb | 121 | int multibytep; |
4ed46869 KH |
122 | { |
123 | ... | |
124 | } | |
125 | #endif | |
126 | ||
127 | /*** GENERAL NOTES on `decode_coding_XXX ()' functions *** | |
128 | ||
b73bfc1c KH |
129 | These functions decode SRC_BYTES length of unibyte text at SOURCE |
130 | encoded in CODING to Emacs' internal format. The resulting | |
131 | multibyte text goes to a place pointed to by DESTINATION, the length | |
132 | of which should not exceed DST_BYTES. | |
d46c5b12 | 133 | |
cfb43547 DL |
134 | These functions set the information about original and decoded texts |
135 | in the members `produced', `produced_char', `consumed', and | |
136 | `consumed_char' of the structure *CODING. They also set the member | |
137 | `result' to one of CODING_FINISH_XXX indicating how the decoding | |
138 | finished. | |
d46c5b12 | 139 | |
cfb43547 | 140 | DST_BYTES zero means that the source area and destination area are |
d46c5b12 | 141 | overlapped, which means that we can produce a decoded text until it |
cfb43547 | 142 | reaches the head of the not-yet-decoded source text. |
d46c5b12 | 143 | |
cfb43547 | 144 | Below is a template for these functions. */ |
4ed46869 | 145 | #if 0 |
b73bfc1c | 146 | static void |
d46c5b12 | 147 | decode_coding_XXX (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
148 | struct coding_system *coding; |
149 | unsigned char *source, *destination; | |
150 | int src_bytes, dst_bytes; | |
4ed46869 KH |
151 | { |
152 | ... | |
153 | } | |
154 | #endif | |
155 | ||
156 | /*** GENERAL NOTES on `encode_coding_XXX ()' functions *** | |
157 | ||
cfb43547 | 158 | These functions encode SRC_BYTES length text at SOURCE from Emacs' |
b73bfc1c KH |
159 | internal multibyte format to CODING. The resulting unibyte text |
160 | goes to a place pointed to by DESTINATION, the length of which | |
161 | should not exceed DST_BYTES. | |
d46c5b12 | 162 | |
cfb43547 DL |
163 | These functions set the information about original and encoded texts |
164 | in the members `produced', `produced_char', `consumed', and | |
165 | `consumed_char' of the structure *CODING. They also set the member | |
166 | `result' to one of CODING_FINISH_XXX indicating how the encoding | |
167 | finished. | |
d46c5b12 | 168 | |
cfb43547 DL |
169 | DST_BYTES zero means that the source area and destination area are |
170 | overlapped, which means that we can produce encoded text until it | |
171 | reaches at the head of the not-yet-encoded source text. | |
d46c5b12 | 172 | |
cfb43547 | 173 | Below is a template for these functions. */ |
4ed46869 | 174 | #if 0 |
b73bfc1c | 175 | static void |
d46c5b12 | 176 | encode_coding_XXX (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
177 | struct coding_system *coding; |
178 | unsigned char *source, *destination; | |
179 | int src_bytes, dst_bytes; | |
4ed46869 KH |
180 | { |
181 | ... | |
182 | } | |
183 | #endif | |
184 | ||
185 | /*** COMMONLY USED MACROS ***/ | |
186 | ||
b73bfc1c KH |
187 | /* The following two macros ONE_MORE_BYTE and TWO_MORE_BYTES safely |
188 | get one, two, and three bytes from the source text respectively. | |
189 | If there are not enough bytes in the source, they jump to | |
190 | `label_end_of_loop'. The caller should set variables `coding', | |
191 | `src' and `src_end' to appropriate pointer in advance. These | |
192 | macros are called from decoding routines `decode_coding_XXX', thus | |
193 | it is assumed that the source text is unibyte. */ | |
4ed46869 | 194 | |
b73bfc1c KH |
195 | #define ONE_MORE_BYTE(c1) \ |
196 | do { \ | |
197 | if (src >= src_end) \ | |
198 | { \ | |
199 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
200 | goto label_end_of_loop; \ | |
201 | } \ | |
202 | c1 = *src++; \ | |
4ed46869 KH |
203 | } while (0) |
204 | ||
b73bfc1c KH |
205 | #define TWO_MORE_BYTES(c1, c2) \ |
206 | do { \ | |
207 | if (src + 1 >= src_end) \ | |
208 | { \ | |
209 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
210 | goto label_end_of_loop; \ | |
211 | } \ | |
212 | c1 = *src++; \ | |
213 | c2 = *src++; \ | |
4ed46869 KH |
214 | } while (0) |
215 | ||
4ed46869 | 216 | |
0a28aafb KH |
217 | /* Like ONE_MORE_BYTE, but 8-bit bytes of data at SRC are in multibyte |
218 | form if MULTIBYTEP is nonzero. */ | |
219 | ||
220 | #define ONE_MORE_BYTE_CHECK_MULTIBYTE(c1, multibytep) \ | |
221 | do { \ | |
222 | if (src >= src_end) \ | |
223 | { \ | |
224 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
225 | goto label_end_of_loop; \ | |
226 | } \ | |
227 | c1 = *src++; \ | |
228 | if (multibytep && c1 == LEADING_CODE_8_BIT_CONTROL) \ | |
229 | c1 = *src++ - 0x20; \ | |
230 | } while (0) | |
231 | ||
b73bfc1c KH |
232 | /* Set C to the next character at the source text pointed by `src'. |
233 | If there are not enough characters in the source, jump to | |
234 | `label_end_of_loop'. The caller should set variables `coding' | |
235 | `src', `src_end', and `translation_table' to appropriate pointers | |
236 | in advance. This macro is used in encoding routines | |
237 | `encode_coding_XXX', thus it assumes that the source text is in | |
238 | multibyte form except for 8-bit characters. 8-bit characters are | |
239 | in multibyte form if coding->src_multibyte is nonzero, else they | |
240 | are represented by a single byte. */ | |
4ed46869 | 241 | |
b73bfc1c KH |
242 | #define ONE_MORE_CHAR(c) \ |
243 | do { \ | |
244 | int len = src_end - src; \ | |
245 | int bytes; \ | |
246 | if (len <= 0) \ | |
247 | { \ | |
248 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
249 | goto label_end_of_loop; \ | |
250 | } \ | |
251 | if (coding->src_multibyte \ | |
252 | || UNIBYTE_STR_AS_MULTIBYTE_P (src, len, bytes)) \ | |
253 | c = STRING_CHAR_AND_LENGTH (src, len, bytes); \ | |
254 | else \ | |
255 | c = *src, bytes = 1; \ | |
256 | if (!NILP (translation_table)) \ | |
39658efc | 257 | c = translate_char (translation_table, c, -1, 0, 0); \ |
b73bfc1c | 258 | src += bytes; \ |
4ed46869 KH |
259 | } while (0) |
260 | ||
4ed46869 | 261 | |
8ca3766a | 262 | /* Produce a multibyte form of character C to `dst'. Jump to |
b73bfc1c KH |
263 | `label_end_of_loop' if there's not enough space at `dst'. |
264 | ||
cfb43547 | 265 | If we are now in the middle of a composition sequence, the decoded |
b73bfc1c KH |
266 | character may be ALTCHAR (for the current composition). In that |
267 | case, the character goes to coding->cmp_data->data instead of | |
268 | `dst'. | |
269 | ||
270 | This macro is used in decoding routines. */ | |
271 | ||
272 | #define EMIT_CHAR(c) \ | |
4ed46869 | 273 | do { \ |
b73bfc1c KH |
274 | if (! COMPOSING_P (coding) \ |
275 | || coding->composing == COMPOSITION_RELATIVE \ | |
276 | || coding->composing == COMPOSITION_WITH_RULE) \ | |
277 | { \ | |
278 | int bytes = CHAR_BYTES (c); \ | |
279 | if ((dst + bytes) > (dst_bytes ? dst_end : src)) \ | |
280 | { \ | |
281 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
282 | goto label_end_of_loop; \ | |
283 | } \ | |
284 | dst += CHAR_STRING (c, dst); \ | |
285 | coding->produced_char++; \ | |
286 | } \ | |
ec6d2bb8 | 287 | \ |
b73bfc1c KH |
288 | if (COMPOSING_P (coding) \ |
289 | && coding->composing != COMPOSITION_RELATIVE) \ | |
290 | { \ | |
291 | CODING_ADD_COMPOSITION_COMPONENT (coding, c); \ | |
292 | coding->composition_rule_follows \ | |
293 | = coding->composing != COMPOSITION_WITH_ALTCHARS; \ | |
294 | } \ | |
4ed46869 KH |
295 | } while (0) |
296 | ||
4ed46869 | 297 | |
b73bfc1c KH |
298 | #define EMIT_ONE_BYTE(c) \ |
299 | do { \ | |
300 | if (dst >= (dst_bytes ? dst_end : src)) \ | |
301 | { \ | |
302 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
303 | goto label_end_of_loop; \ | |
304 | } \ | |
305 | *dst++ = c; \ | |
306 | } while (0) | |
307 | ||
308 | #define EMIT_TWO_BYTES(c1, c2) \ | |
309 | do { \ | |
310 | if (dst + 2 > (dst_bytes ? dst_end : src)) \ | |
311 | { \ | |
312 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
313 | goto label_end_of_loop; \ | |
314 | } \ | |
315 | *dst++ = c1, *dst++ = c2; \ | |
316 | } while (0) | |
317 | ||
318 | #define EMIT_BYTES(from, to) \ | |
319 | do { \ | |
320 | if (dst + (to - from) > (dst_bytes ? dst_end : src)) \ | |
321 | { \ | |
322 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
323 | goto label_end_of_loop; \ | |
324 | } \ | |
325 | while (from < to) \ | |
326 | *dst++ = *from++; \ | |
4ed46869 KH |
327 | } while (0) |
328 | ||
329 | \f | |
330 | /*** 1. Preamble ***/ | |
331 | ||
68c45bf0 PE |
332 | #ifdef emacs |
333 | #include <config.h> | |
334 | #endif | |
335 | ||
4ed46869 KH |
336 | #include <stdio.h> |
337 | ||
338 | #ifdef emacs | |
339 | ||
4ed46869 KH |
340 | #include "lisp.h" |
341 | #include "buffer.h" | |
342 | #include "charset.h" | |
ec6d2bb8 | 343 | #include "composite.h" |
4ed46869 KH |
344 | #include "ccl.h" |
345 | #include "coding.h" | |
346 | #include "window.h" | |
347 | ||
348 | #else /* not emacs */ | |
349 | ||
350 | #include "mulelib.h" | |
351 | ||
352 | #endif /* not emacs */ | |
353 | ||
354 | Lisp_Object Qcoding_system, Qeol_type; | |
355 | Lisp_Object Qbuffer_file_coding_system; | |
356 | Lisp_Object Qpost_read_conversion, Qpre_write_conversion; | |
27901516 | 357 | Lisp_Object Qno_conversion, Qundecided; |
bb0115a2 | 358 | Lisp_Object Qcoding_system_history; |
05e6f5dc | 359 | Lisp_Object Qsafe_chars; |
1397dc18 | 360 | Lisp_Object Qvalid_codes; |
4ed46869 KH |
361 | |
362 | extern Lisp_Object Qinsert_file_contents, Qwrite_region; | |
363 | Lisp_Object Qcall_process, Qcall_process_region, Qprocess_argument; | |
364 | Lisp_Object Qstart_process, Qopen_network_stream; | |
365 | Lisp_Object Qtarget_idx; | |
366 | ||
d46c5b12 KH |
367 | Lisp_Object Vselect_safe_coding_system_function; |
368 | ||
7722baf9 EZ |
369 | /* Mnemonic string for each format of end-of-line. */ |
370 | Lisp_Object eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac; | |
371 | /* Mnemonic string to indicate format of end-of-line is not yet | |
4ed46869 | 372 | decided. */ |
7722baf9 | 373 | Lisp_Object eol_mnemonic_undecided; |
4ed46869 | 374 | |
9ce27fde KH |
375 | /* Format of end-of-line decided by system. This is CODING_EOL_LF on |
376 | Unix, CODING_EOL_CRLF on DOS/Windows, and CODING_EOL_CR on Mac. */ | |
377 | int system_eol_type; | |
378 | ||
4ed46869 KH |
379 | #ifdef emacs |
380 | ||
4608c386 KH |
381 | Lisp_Object Vcoding_system_list, Vcoding_system_alist; |
382 | ||
383 | Lisp_Object Qcoding_system_p, Qcoding_system_error; | |
4ed46869 | 384 | |
d46c5b12 KH |
385 | /* Coding system emacs-mule and raw-text are for converting only |
386 | end-of-line format. */ | |
387 | Lisp_Object Qemacs_mule, Qraw_text; | |
9ce27fde | 388 | |
4ed46869 KH |
389 | /* Coding-systems are handed between Emacs Lisp programs and C internal |
390 | routines by the following three variables. */ | |
391 | /* Coding-system for reading files and receiving data from process. */ | |
392 | Lisp_Object Vcoding_system_for_read; | |
393 | /* Coding-system for writing files and sending data to process. */ | |
394 | Lisp_Object Vcoding_system_for_write; | |
395 | /* Coding-system actually used in the latest I/O. */ | |
396 | Lisp_Object Vlast_coding_system_used; | |
397 | ||
c4825358 | 398 | /* A vector of length 256 which contains information about special |
94487c4e | 399 | Latin codes (especially for dealing with Microsoft codes). */ |
3f003981 | 400 | Lisp_Object Vlatin_extra_code_table; |
c4825358 | 401 | |
9ce27fde KH |
402 | /* Flag to inhibit code conversion of end-of-line format. */ |
403 | int inhibit_eol_conversion; | |
404 | ||
74383408 KH |
405 | /* Flag to inhibit ISO2022 escape sequence detection. */ |
406 | int inhibit_iso_escape_detection; | |
407 | ||
ed29121d EZ |
408 | /* Flag to make buffer-file-coding-system inherit from process-coding. */ |
409 | int inherit_process_coding_system; | |
410 | ||
c4825358 | 411 | /* Coding system to be used to encode text for terminal display. */ |
4ed46869 KH |
412 | struct coding_system terminal_coding; |
413 | ||
c4825358 KH |
414 | /* Coding system to be used to encode text for terminal display when |
415 | terminal coding system is nil. */ | |
416 | struct coding_system safe_terminal_coding; | |
417 | ||
418 | /* Coding system of what is sent from terminal keyboard. */ | |
4ed46869 KH |
419 | struct coding_system keyboard_coding; |
420 | ||
6bc51348 KH |
421 | /* Default coding system to be used to write a file. */ |
422 | struct coding_system default_buffer_file_coding; | |
423 | ||
02ba4723 KH |
424 | Lisp_Object Vfile_coding_system_alist; |
425 | Lisp_Object Vprocess_coding_system_alist; | |
426 | Lisp_Object Vnetwork_coding_system_alist; | |
4ed46869 | 427 | |
68c45bf0 PE |
428 | Lisp_Object Vlocale_coding_system; |
429 | ||
4ed46869 KH |
430 | #endif /* emacs */ |
431 | ||
d46c5b12 | 432 | Lisp_Object Qcoding_category, Qcoding_category_index; |
4ed46869 KH |
433 | |
434 | /* List of symbols `coding-category-xxx' ordered by priority. */ | |
435 | Lisp_Object Vcoding_category_list; | |
436 | ||
d46c5b12 KH |
437 | /* Table of coding categories (Lisp symbols). */ |
438 | Lisp_Object Vcoding_category_table; | |
4ed46869 KH |
439 | |
440 | /* Table of names of symbol for each coding-category. */ | |
441 | char *coding_category_name[CODING_CATEGORY_IDX_MAX] = { | |
0ef69138 | 442 | "coding-category-emacs-mule", |
4ed46869 KH |
443 | "coding-category-sjis", |
444 | "coding-category-iso-7", | |
d46c5b12 | 445 | "coding-category-iso-7-tight", |
4ed46869 KH |
446 | "coding-category-iso-8-1", |
447 | "coding-category-iso-8-2", | |
7717c392 KH |
448 | "coding-category-iso-7-else", |
449 | "coding-category-iso-8-else", | |
89fa8b36 | 450 | "coding-category-ccl", |
4ed46869 | 451 | "coding-category-big5", |
fa42c37f KH |
452 | "coding-category-utf-8", |
453 | "coding-category-utf-16-be", | |
454 | "coding-category-utf-16-le", | |
27901516 | 455 | "coding-category-raw-text", |
89fa8b36 | 456 | "coding-category-binary" |
4ed46869 KH |
457 | }; |
458 | ||
66cfb530 | 459 | /* Table of pointers to coding systems corresponding to each coding |
d46c5b12 KH |
460 | categories. */ |
461 | struct coding_system *coding_system_table[CODING_CATEGORY_IDX_MAX]; | |
462 | ||
66cfb530 | 463 | /* Table of coding category masks. Nth element is a mask for a coding |
8ca3766a | 464 | category of which priority is Nth. */ |
66cfb530 KH |
465 | static |
466 | int coding_priorities[CODING_CATEGORY_IDX_MAX]; | |
467 | ||
f967223b KH |
468 | /* Flag to tell if we look up translation table on character code |
469 | conversion. */ | |
84fbb8a0 | 470 | Lisp_Object Venable_character_translation; |
f967223b KH |
471 | /* Standard translation table to look up on decoding (reading). */ |
472 | Lisp_Object Vstandard_translation_table_for_decode; | |
473 | /* Standard translation table to look up on encoding (writing). */ | |
474 | Lisp_Object Vstandard_translation_table_for_encode; | |
84fbb8a0 | 475 | |
f967223b KH |
476 | Lisp_Object Qtranslation_table; |
477 | Lisp_Object Qtranslation_table_id; | |
478 | Lisp_Object Qtranslation_table_for_decode; | |
479 | Lisp_Object Qtranslation_table_for_encode; | |
4ed46869 KH |
480 | |
481 | /* Alist of charsets vs revision number. */ | |
482 | Lisp_Object Vcharset_revision_alist; | |
483 | ||
02ba4723 KH |
484 | /* Default coding systems used for process I/O. */ |
485 | Lisp_Object Vdefault_process_coding_system; | |
486 | ||
b843d1ae KH |
487 | /* Global flag to tell that we can't call post-read-conversion and |
488 | pre-write-conversion functions. Usually the value is zero, but it | |
489 | is set to 1 temporarily while such functions are running. This is | |
490 | to avoid infinite recursive call. */ | |
491 | static int inhibit_pre_post_conversion; | |
492 | ||
05e6f5dc KH |
493 | /* Char-table containing safe coding systems of each character. */ |
494 | Lisp_Object Vchar_coding_system_table; | |
495 | Lisp_Object Qchar_coding_system; | |
496 | ||
497 | /* Return `safe-chars' property of coding system CODING. Don't check | |
498 | validity of CODING. */ | |
499 | ||
500 | Lisp_Object | |
501 | coding_safe_chars (coding) | |
502 | struct coding_system *coding; | |
503 | { | |
504 | Lisp_Object coding_spec, plist, safe_chars; | |
505 | ||
506 | coding_spec = Fget (coding->symbol, Qcoding_system); | |
507 | plist = XVECTOR (coding_spec)->contents[3]; | |
508 | safe_chars = Fplist_get (XVECTOR (coding_spec)->contents[3], Qsafe_chars); | |
509 | return (CHAR_TABLE_P (safe_chars) ? safe_chars : Qt); | |
510 | } | |
511 | ||
512 | #define CODING_SAFE_CHAR_P(safe_chars, c) \ | |
513 | (EQ (safe_chars, Qt) || !NILP (CHAR_TABLE_REF (safe_chars, c))) | |
514 | ||
4ed46869 | 515 | \f |
0ef69138 | 516 | /*** 2. Emacs internal format (emacs-mule) handlers ***/ |
4ed46869 | 517 | |
aa72b389 KH |
518 | /* Emacs' internal format for representation of multiple character |
519 | sets is a kind of multi-byte encoding, i.e. characters are | |
520 | represented by variable-length sequences of one-byte codes. | |
b73bfc1c KH |
521 | |
522 | ASCII characters and control characters (e.g. `tab', `newline') are | |
523 | represented by one-byte sequences which are their ASCII codes, in | |
524 | the range 0x00 through 0x7F. | |
525 | ||
526 | 8-bit characters of the range 0x80..0x9F are represented by | |
527 | two-byte sequences of LEADING_CODE_8_BIT_CONTROL and (their 8-bit | |
528 | code + 0x20). | |
529 | ||
530 | 8-bit characters of the range 0xA0..0xFF are represented by | |
531 | one-byte sequences which are their 8-bit code. | |
532 | ||
533 | The other characters are represented by a sequence of `base | |
534 | leading-code', optional `extended leading-code', and one or two | |
535 | `position-code's. The length of the sequence is determined by the | |
aa72b389 | 536 | base leading-code. Leading-code takes the range 0x81 through 0x9D, |
b73bfc1c KH |
537 | whereas extended leading-code and position-code take the range 0xA0 |
538 | through 0xFF. See `charset.h' for more details about leading-code | |
539 | and position-code. | |
f4dee582 | 540 | |
4ed46869 | 541 | --- CODE RANGE of Emacs' internal format --- |
b73bfc1c KH |
542 | character set range |
543 | ------------- ----- | |
544 | ascii 0x00..0x7F | |
545 | eight-bit-control LEADING_CODE_8_BIT_CONTROL + 0xA0..0xBF | |
546 | eight-bit-graphic 0xA0..0xBF | |
aa72b389 | 547 | ELSE 0x81..0x9D + [0xA0..0xFF]+ |
4ed46869 KH |
548 | --------------------------------------------- |
549 | ||
aa72b389 KH |
550 | As this is the internal character representation, the format is |
551 | usually not used externally (i.e. in a file or in a data sent to a | |
552 | process). But, it is possible to have a text externally in this | |
553 | format (i.e. by encoding by the coding system `emacs-mule'). | |
554 | ||
555 | In that case, a sequence of one-byte codes has a slightly different | |
556 | form. | |
557 | ||
ae5145c2 | 558 | Firstly, all characters in eight-bit-control are represented by |
aa72b389 KH |
559 | one-byte sequences which are their 8-bit code. |
560 | ||
561 | Next, character composition data are represented by the byte | |
562 | sequence of the form: 0x80 METHOD BYTES CHARS COMPONENT ..., | |
563 | where, | |
564 | METHOD is 0xF0 plus one of composition method (enum | |
565 | composition_method), | |
566 | ||
ae5145c2 | 567 | BYTES is 0xA0 plus the byte length of these composition data, |
aa72b389 | 568 | |
ae5145c2 | 569 | CHARS is 0xA0 plus the number of characters composed by these |
aa72b389 KH |
570 | data, |
571 | ||
8ca3766a | 572 | COMPONENTs are characters of multibyte form or composition |
aa72b389 KH |
573 | rules encoded by two-byte of ASCII codes. |
574 | ||
575 | In addition, for backward compatibility, the following formats are | |
576 | also recognized as composition data on decoding. | |
577 | ||
578 | 0x80 MSEQ ... | |
579 | 0x80 0xFF MSEQ RULE MSEQ RULE ... MSEQ | |
580 | ||
581 | Here, | |
582 | MSEQ is a multibyte form but in these special format: | |
583 | ASCII: 0xA0 ASCII_CODE+0x80, | |
584 | other: LEADING_CODE+0x20 FOLLOWING-BYTE ..., | |
585 | RULE is a one byte code of the range 0xA0..0xF0 that | |
586 | represents a composition rule. | |
4ed46869 KH |
587 | */ |
588 | ||
589 | enum emacs_code_class_type emacs_code_class[256]; | |
590 | ||
4ed46869 KH |
591 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
592 | Check if a text is encoded in Emacs' internal format. If it is, | |
d46c5b12 | 593 | return CODING_CATEGORY_MASK_EMACS_MULE, else return 0. */ |
4ed46869 | 594 | |
0a28aafb KH |
595 | static int |
596 | detect_coding_emacs_mule (src, src_end, multibytep) | |
b73bfc1c | 597 | unsigned char *src, *src_end; |
0a28aafb | 598 | int multibytep; |
4ed46869 KH |
599 | { |
600 | unsigned char c; | |
601 | int composing = 0; | |
b73bfc1c KH |
602 | /* Dummy for ONE_MORE_BYTE. */ |
603 | struct coding_system dummy_coding; | |
604 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 605 | |
b73bfc1c | 606 | while (1) |
4ed46869 | 607 | { |
0a28aafb | 608 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
4ed46869 KH |
609 | |
610 | if (composing) | |
611 | { | |
612 | if (c < 0xA0) | |
613 | composing = 0; | |
b73bfc1c KH |
614 | else if (c == 0xA0) |
615 | { | |
0a28aafb | 616 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
b73bfc1c KH |
617 | c &= 0x7F; |
618 | } | |
4ed46869 KH |
619 | else |
620 | c -= 0x20; | |
621 | } | |
622 | ||
b73bfc1c | 623 | if (c < 0x20) |
4ed46869 | 624 | { |
4ed46869 KH |
625 | if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) |
626 | return 0; | |
b73bfc1c KH |
627 | } |
628 | else if (c >= 0x80 && c < 0xA0) | |
629 | { | |
630 | if (c == 0x80) | |
631 | /* Old leading code for a composite character. */ | |
632 | composing = 1; | |
633 | else | |
634 | { | |
635 | unsigned char *src_base = src - 1; | |
636 | int bytes; | |
4ed46869 | 637 | |
b73bfc1c KH |
638 | if (!UNIBYTE_STR_AS_MULTIBYTE_P (src_base, src_end - src_base, |
639 | bytes)) | |
640 | return 0; | |
641 | src = src_base + bytes; | |
642 | } | |
643 | } | |
644 | } | |
645 | label_end_of_loop: | |
646 | return CODING_CATEGORY_MASK_EMACS_MULE; | |
647 | } | |
4ed46869 | 648 | |
4ed46869 | 649 | |
aa72b389 KH |
650 | /* Record the starting position START and METHOD of one composition. */ |
651 | ||
652 | #define CODING_ADD_COMPOSITION_START(coding, start, method) \ | |
653 | do { \ | |
654 | struct composition_data *cmp_data = coding->cmp_data; \ | |
655 | int *data = cmp_data->data + cmp_data->used; \ | |
656 | coding->cmp_data_start = cmp_data->used; \ | |
657 | data[0] = -1; \ | |
658 | data[1] = cmp_data->char_offset + start; \ | |
659 | data[3] = (int) method; \ | |
660 | cmp_data->used += 4; \ | |
661 | } while (0) | |
662 | ||
663 | /* Record the ending position END of the current composition. */ | |
664 | ||
665 | #define CODING_ADD_COMPOSITION_END(coding, end) \ | |
666 | do { \ | |
667 | struct composition_data *cmp_data = coding->cmp_data; \ | |
668 | int *data = cmp_data->data + coding->cmp_data_start; \ | |
669 | data[0] = cmp_data->used - coding->cmp_data_start; \ | |
670 | data[2] = cmp_data->char_offset + end; \ | |
671 | } while (0) | |
672 | ||
673 | /* Record one COMPONENT (alternate character or composition rule). */ | |
674 | ||
675 | #define CODING_ADD_COMPOSITION_COMPONENT(coding, component) \ | |
676 | (coding->cmp_data->data[coding->cmp_data->used++] = component) | |
677 | ||
678 | ||
679 | /* Get one byte from a data pointed by SRC and increment SRC. If SRC | |
8ca3766a | 680 | is not less than SRC_END, return -1 without incrementing Src. */ |
aa72b389 KH |
681 | |
682 | #define SAFE_ONE_MORE_BYTE() (src >= src_end ? -1 : *src++) | |
683 | ||
684 | ||
685 | /* Decode a character represented as a component of composition | |
686 | sequence of Emacs 20 style at SRC. Set C to that character, store | |
687 | its multibyte form sequence at P, and set P to the end of that | |
688 | sequence. If no valid character is found, set C to -1. */ | |
689 | ||
690 | #define DECODE_EMACS_MULE_COMPOSITION_CHAR(c, p) \ | |
691 | do { \ | |
692 | int bytes; \ | |
693 | \ | |
694 | c = SAFE_ONE_MORE_BYTE (); \ | |
695 | if (c < 0) \ | |
696 | break; \ | |
697 | if (CHAR_HEAD_P (c)) \ | |
698 | c = -1; \ | |
699 | else if (c == 0xA0) \ | |
700 | { \ | |
701 | c = SAFE_ONE_MORE_BYTE (); \ | |
702 | if (c < 0xA0) \ | |
703 | c = -1; \ | |
704 | else \ | |
705 | { \ | |
706 | c -= 0xA0; \ | |
707 | *p++ = c; \ | |
708 | } \ | |
709 | } \ | |
710 | else if (BASE_LEADING_CODE_P (c - 0x20)) \ | |
711 | { \ | |
712 | unsigned char *p0 = p; \ | |
713 | \ | |
714 | c -= 0x20; \ | |
715 | *p++ = c; \ | |
716 | bytes = BYTES_BY_CHAR_HEAD (c); \ | |
717 | while (--bytes) \ | |
718 | { \ | |
719 | c = SAFE_ONE_MORE_BYTE (); \ | |
720 | if (c < 0) \ | |
721 | break; \ | |
722 | *p++ = c; \ | |
723 | } \ | |
724 | if (UNIBYTE_STR_AS_MULTIBYTE_P (p0, p - p0, bytes)) \ | |
725 | c = STRING_CHAR (p0, bytes); \ | |
726 | else \ | |
727 | c = -1; \ | |
728 | } \ | |
729 | else \ | |
730 | c = -1; \ | |
731 | } while (0) | |
732 | ||
733 | ||
734 | /* Decode a composition rule represented as a component of composition | |
735 | sequence of Emacs 20 style at SRC. Set C to the rule. If not | |
736 | valid rule is found, set C to -1. */ | |
737 | ||
738 | #define DECODE_EMACS_MULE_COMPOSITION_RULE(c) \ | |
739 | do { \ | |
740 | c = SAFE_ONE_MORE_BYTE (); \ | |
741 | c -= 0xA0; \ | |
742 | if (c < 0 || c >= 81) \ | |
743 | c = -1; \ | |
744 | else \ | |
745 | { \ | |
746 | gref = c / 9, nref = c % 9; \ | |
747 | c = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
748 | } \ | |
749 | } while (0) | |
750 | ||
751 | ||
752 | /* Decode composition sequence encoded by `emacs-mule' at the source | |
753 | pointed by SRC. SRC_END is the end of source. Store information | |
754 | of the composition in CODING->cmp_data. | |
755 | ||
756 | For backward compatibility, decode also a composition sequence of | |
757 | Emacs 20 style. In that case, the composition sequence contains | |
758 | characters that should be extracted into a buffer or string. Store | |
759 | those characters at *DESTINATION in multibyte form. | |
760 | ||
761 | If we encounter an invalid byte sequence, return 0. | |
762 | If we encounter an insufficient source or destination, or | |
763 | insufficient space in CODING->cmp_data, return 1. | |
764 | Otherwise, return consumed bytes in the source. | |
765 | ||
766 | */ | |
767 | static INLINE int | |
768 | decode_composition_emacs_mule (coding, src, src_end, | |
769 | destination, dst_end, dst_bytes) | |
770 | struct coding_system *coding; | |
771 | unsigned char *src, *src_end, **destination, *dst_end; | |
772 | int dst_bytes; | |
773 | { | |
774 | unsigned char *dst = *destination; | |
775 | int method, data_len, nchars; | |
776 | unsigned char *src_base = src++; | |
8ca3766a | 777 | /* Store components of composition. */ |
aa72b389 KH |
778 | int component[COMPOSITION_DATA_MAX_BUNCH_LENGTH]; |
779 | int ncomponent; | |
780 | /* Store multibyte form of characters to be composed. This is for | |
781 | Emacs 20 style composition sequence. */ | |
782 | unsigned char buf[MAX_COMPOSITION_COMPONENTS * MAX_MULTIBYTE_LENGTH]; | |
783 | unsigned char *bufp = buf; | |
784 | int c, i, gref, nref; | |
785 | ||
786 | if (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH | |
787 | >= COMPOSITION_DATA_SIZE) | |
788 | { | |
789 | coding->result = CODING_FINISH_INSUFFICIENT_CMP; | |
790 | return -1; | |
791 | } | |
792 | ||
793 | ONE_MORE_BYTE (c); | |
794 | if (c - 0xF0 >= COMPOSITION_RELATIVE | |
795 | && c - 0xF0 <= COMPOSITION_WITH_RULE_ALTCHARS) | |
796 | { | |
797 | int with_rule; | |
798 | ||
799 | method = c - 0xF0; | |
800 | with_rule = (method == COMPOSITION_WITH_RULE | |
801 | || method == COMPOSITION_WITH_RULE_ALTCHARS); | |
802 | ONE_MORE_BYTE (c); | |
803 | data_len = c - 0xA0; | |
804 | if (data_len < 4 | |
805 | || src_base + data_len > src_end) | |
806 | return 0; | |
807 | ONE_MORE_BYTE (c); | |
808 | nchars = c - 0xA0; | |
809 | if (c < 1) | |
810 | return 0; | |
811 | for (ncomponent = 0; src < src_base + data_len; ncomponent++) | |
812 | { | |
813 | if (ncomponent % 2 && with_rule) | |
814 | { | |
815 | ONE_MORE_BYTE (gref); | |
816 | gref -= 32; | |
817 | ONE_MORE_BYTE (nref); | |
818 | nref -= 32; | |
819 | c = COMPOSITION_ENCODE_RULE (gref, nref); | |
820 | } | |
821 | else | |
822 | { | |
823 | int bytes; | |
824 | if (UNIBYTE_STR_AS_MULTIBYTE_P (src, src_end - src, bytes)) | |
825 | c = STRING_CHAR (src, bytes); | |
826 | else | |
827 | c = *src, bytes = 1; | |
828 | src += bytes; | |
829 | } | |
830 | component[ncomponent] = c; | |
831 | } | |
832 | } | |
833 | else | |
834 | { | |
835 | /* This may be an old Emacs 20 style format. See the comment at | |
836 | the section 2 of this file. */ | |
837 | while (src < src_end && !CHAR_HEAD_P (*src)) src++; | |
838 | if (src == src_end | |
839 | && !(coding->mode & CODING_MODE_LAST_BLOCK)) | |
840 | goto label_end_of_loop; | |
841 | ||
842 | src_end = src; | |
843 | src = src_base + 1; | |
844 | if (c < 0xC0) | |
845 | { | |
846 | method = COMPOSITION_RELATIVE; | |
847 | for (ncomponent = 0; ncomponent < MAX_COMPOSITION_COMPONENTS;) | |
848 | { | |
849 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
850 | if (c < 0) | |
851 | break; | |
852 | component[ncomponent++] = c; | |
853 | } | |
854 | if (ncomponent < 2) | |
855 | return 0; | |
856 | nchars = ncomponent; | |
857 | } | |
858 | else if (c == 0xFF) | |
859 | { | |
860 | method = COMPOSITION_WITH_RULE; | |
861 | src++; | |
862 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
863 | if (c < 0) | |
864 | return 0; | |
865 | component[0] = c; | |
866 | for (ncomponent = 1; | |
867 | ncomponent < MAX_COMPOSITION_COMPONENTS * 2 - 1;) | |
868 | { | |
869 | DECODE_EMACS_MULE_COMPOSITION_RULE (c); | |
870 | if (c < 0) | |
871 | break; | |
872 | component[ncomponent++] = c; | |
873 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
874 | if (c < 0) | |
875 | break; | |
876 | component[ncomponent++] = c; | |
877 | } | |
878 | if (ncomponent < 3) | |
879 | return 0; | |
880 | nchars = (ncomponent + 1) / 2; | |
881 | } | |
882 | else | |
883 | return 0; | |
884 | } | |
885 | ||
886 | if (buf == bufp || dst + (bufp - buf) <= (dst_bytes ? dst_end : src)) | |
887 | { | |
888 | CODING_ADD_COMPOSITION_START (coding, coding->produced_char, method); | |
889 | for (i = 0; i < ncomponent; i++) | |
890 | CODING_ADD_COMPOSITION_COMPONENT (coding, component[i]); | |
891 | CODING_ADD_COMPOSITION_END (coding, coding->produced_char + nchars); | |
892 | if (buf < bufp) | |
893 | { | |
894 | unsigned char *p = buf; | |
895 | EMIT_BYTES (p, bufp); | |
896 | *destination += bufp - buf; | |
897 | coding->produced_char += nchars; | |
898 | } | |
899 | return (src - src_base); | |
900 | } | |
901 | label_end_of_loop: | |
902 | return -1; | |
903 | } | |
904 | ||
b73bfc1c | 905 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
4ed46869 | 906 | |
b73bfc1c KH |
907 | static void |
908 | decode_coding_emacs_mule (coding, source, destination, src_bytes, dst_bytes) | |
909 | struct coding_system *coding; | |
910 | unsigned char *source, *destination; | |
911 | int src_bytes, dst_bytes; | |
912 | { | |
913 | unsigned char *src = source; | |
914 | unsigned char *src_end = source + src_bytes; | |
915 | unsigned char *dst = destination; | |
916 | unsigned char *dst_end = destination + dst_bytes; | |
917 | /* SRC_BASE remembers the start position in source in each loop. | |
918 | The loop will be exited when there's not enough source code, or | |
919 | when there's not enough destination area to produce a | |
920 | character. */ | |
921 | unsigned char *src_base; | |
4ed46869 | 922 | |
b73bfc1c | 923 | coding->produced_char = 0; |
8a33cf7b | 924 | while ((src_base = src) < src_end) |
b73bfc1c KH |
925 | { |
926 | unsigned char tmp[MAX_MULTIBYTE_LENGTH], *p; | |
927 | int bytes; | |
ec6d2bb8 | 928 | |
4af310db EZ |
929 | if (*src == '\r') |
930 | { | |
2bcdf662 | 931 | int c = *src++; |
4af310db | 932 | |
4af310db EZ |
933 | if (coding->eol_type == CODING_EOL_CR) |
934 | c = '\n'; | |
935 | else if (coding->eol_type == CODING_EOL_CRLF) | |
936 | { | |
937 | ONE_MORE_BYTE (c); | |
938 | if (c != '\n') | |
939 | { | |
940 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
941 | { | |
942 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
943 | goto label_end_of_loop; | |
944 | } | |
945 | src--; | |
946 | c = '\r'; | |
947 | } | |
948 | } | |
949 | *dst++ = c; | |
950 | coding->produced_char++; | |
951 | continue; | |
952 | } | |
953 | else if (*src == '\n') | |
954 | { | |
955 | if ((coding->eol_type == CODING_EOL_CR | |
956 | || coding->eol_type == CODING_EOL_CRLF) | |
957 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
958 | { | |
959 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
960 | goto label_end_of_loop; | |
961 | } | |
962 | *dst++ = *src++; | |
963 | coding->produced_char++; | |
964 | continue; | |
965 | } | |
aa72b389 KH |
966 | else if (*src == 0x80) |
967 | { | |
968 | /* Start of composition data. */ | |
969 | int consumed = decode_composition_emacs_mule (coding, src, src_end, | |
970 | &dst, dst_end, | |
971 | dst_bytes); | |
972 | if (consumed < 0) | |
973 | goto label_end_of_loop; | |
974 | else if (consumed > 0) | |
975 | { | |
976 | src += consumed; | |
977 | continue; | |
978 | } | |
979 | bytes = CHAR_STRING (*src, tmp); | |
980 | p = tmp; | |
981 | src++; | |
982 | } | |
4af310db | 983 | else if (UNIBYTE_STR_AS_MULTIBYTE_P (src, src_end - src, bytes)) |
b73bfc1c KH |
984 | { |
985 | p = src; | |
986 | src += bytes; | |
987 | } | |
988 | else | |
989 | { | |
990 | bytes = CHAR_STRING (*src, tmp); | |
991 | p = tmp; | |
992 | src++; | |
993 | } | |
994 | if (dst + bytes >= (dst_bytes ? dst_end : src)) | |
995 | { | |
996 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
4ed46869 KH |
997 | break; |
998 | } | |
b73bfc1c KH |
999 | while (bytes--) *dst++ = *p++; |
1000 | coding->produced_char++; | |
4ed46869 | 1001 | } |
4af310db | 1002 | label_end_of_loop: |
b73bfc1c KH |
1003 | coding->consumed = coding->consumed_char = src_base - source; |
1004 | coding->produced = dst - destination; | |
4ed46869 KH |
1005 | } |
1006 | ||
b73bfc1c | 1007 | |
aa72b389 KH |
1008 | /* Encode composition data stored at DATA into a special byte sequence |
1009 | starting by 0x80. Update CODING->cmp_data_start and maybe | |
1010 | CODING->cmp_data for the next call. */ | |
1011 | ||
1012 | #define ENCODE_COMPOSITION_EMACS_MULE(coding, data) \ | |
1013 | do { \ | |
1014 | unsigned char buf[1024], *p0 = buf, *p; \ | |
1015 | int len = data[0]; \ | |
1016 | int i; \ | |
1017 | \ | |
1018 | buf[0] = 0x80; \ | |
1019 | buf[1] = 0xF0 + data[3]; /* METHOD */ \ | |
1020 | buf[3] = 0xA0 + (data[2] - data[1]); /* COMPOSED-CHARS */ \ | |
1021 | p = buf + 4; \ | |
1022 | if (data[3] == COMPOSITION_WITH_RULE \ | |
1023 | || data[3] == COMPOSITION_WITH_RULE_ALTCHARS) \ | |
1024 | { \ | |
1025 | p += CHAR_STRING (data[4], p); \ | |
1026 | for (i = 5; i < len; i += 2) \ | |
1027 | { \ | |
1028 | int gref, nref; \ | |
1029 | COMPOSITION_DECODE_RULE (data[i], gref, nref); \ | |
1030 | *p++ = 0x20 + gref; \ | |
1031 | *p++ = 0x20 + nref; \ | |
1032 | p += CHAR_STRING (data[i + 1], p); \ | |
1033 | } \ | |
1034 | } \ | |
1035 | else \ | |
1036 | { \ | |
1037 | for (i = 4; i < len; i++) \ | |
1038 | p += CHAR_STRING (data[i], p); \ | |
1039 | } \ | |
1040 | buf[2] = 0xA0 + (p - buf); /* COMPONENTS-BYTES */ \ | |
1041 | \ | |
1042 | if (dst + (p - buf) + 4 > (dst_bytes ? dst_end : src)) \ | |
1043 | { \ | |
1044 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
1045 | goto label_end_of_loop; \ | |
1046 | } \ | |
1047 | while (p0 < p) \ | |
1048 | *dst++ = *p0++; \ | |
1049 | coding->cmp_data_start += data[0]; \ | |
1050 | if (coding->cmp_data_start == coding->cmp_data->used \ | |
1051 | && coding->cmp_data->next) \ | |
1052 | { \ | |
1053 | coding->cmp_data = coding->cmp_data->next; \ | |
1054 | coding->cmp_data_start = 0; \ | |
1055 | } \ | |
1056 | } while (0) | |
1057 | ||
1058 | ||
1059 | static void encode_eol P_ ((struct coding_system *, unsigned char *, | |
1060 | unsigned char *, int, int)); | |
1061 | ||
1062 | static void | |
1063 | encode_coding_emacs_mule (coding, source, destination, src_bytes, dst_bytes) | |
1064 | struct coding_system *coding; | |
1065 | unsigned char *source, *destination; | |
1066 | int src_bytes, dst_bytes; | |
1067 | { | |
1068 | unsigned char *src = source; | |
1069 | unsigned char *src_end = source + src_bytes; | |
1070 | unsigned char *dst = destination; | |
1071 | unsigned char *dst_end = destination + dst_bytes; | |
1072 | unsigned char *src_base; | |
1073 | int c; | |
1074 | int char_offset; | |
1075 | int *data; | |
1076 | ||
1077 | Lisp_Object translation_table; | |
1078 | ||
1079 | translation_table = Qnil; | |
1080 | ||
1081 | /* Optimization for the case that there's no composition. */ | |
1082 | if (!coding->cmp_data || coding->cmp_data->used == 0) | |
1083 | { | |
1084 | encode_eol (coding, source, destination, src_bytes, dst_bytes); | |
1085 | return; | |
1086 | } | |
1087 | ||
1088 | char_offset = coding->cmp_data->char_offset; | |
1089 | data = coding->cmp_data->data + coding->cmp_data_start; | |
1090 | while (1) | |
1091 | { | |
1092 | src_base = src; | |
1093 | ||
1094 | /* If SRC starts a composition, encode the information about the | |
1095 | composition in advance. */ | |
1096 | if (coding->cmp_data_start < coding->cmp_data->used | |
1097 | && char_offset + coding->consumed_char == data[1]) | |
1098 | { | |
1099 | ENCODE_COMPOSITION_EMACS_MULE (coding, data); | |
1100 | char_offset = coding->cmp_data->char_offset; | |
1101 | data = coding->cmp_data->data + coding->cmp_data_start; | |
1102 | } | |
1103 | ||
1104 | ONE_MORE_CHAR (c); | |
1105 | if (c == '\n' && (coding->eol_type == CODING_EOL_CRLF | |
1106 | || coding->eol_type == CODING_EOL_CR)) | |
1107 | { | |
1108 | if (coding->eol_type == CODING_EOL_CRLF) | |
1109 | EMIT_TWO_BYTES ('\r', c); | |
1110 | else | |
1111 | EMIT_ONE_BYTE ('\r'); | |
1112 | } | |
1113 | else if (SINGLE_BYTE_CHAR_P (c)) | |
1114 | EMIT_ONE_BYTE (c); | |
1115 | else | |
1116 | EMIT_BYTES (src_base, src); | |
1117 | coding->consumed_char++; | |
1118 | } | |
1119 | label_end_of_loop: | |
1120 | coding->consumed = src_base - source; | |
1121 | coding->produced = coding->produced_char = dst - destination; | |
1122 | return; | |
1123 | } | |
b73bfc1c | 1124 | |
4ed46869 KH |
1125 | \f |
1126 | /*** 3. ISO2022 handlers ***/ | |
1127 | ||
1128 | /* The following note describes the coding system ISO2022 briefly. | |
39787efd | 1129 | Since the intention of this note is to help understand the |
cfb43547 | 1130 | functions in this file, some parts are NOT ACCURATE or are OVERLY |
39787efd | 1131 | SIMPLIFIED. For thorough understanding, please refer to the |
cfb43547 DL |
1132 | original document of ISO2022. This is equivalent to the standard |
1133 | ECMA-35, obtainable from <URL:http://www.ecma.ch/> (*). | |
4ed46869 KH |
1134 | |
1135 | ISO2022 provides many mechanisms to encode several character sets | |
cfb43547 | 1136 | in 7-bit and 8-bit environments. For 7-bit environments, all text |
39787efd KH |
1137 | is encoded using bytes less than 128. This may make the encoded |
1138 | text a little bit longer, but the text passes more easily through | |
cfb43547 | 1139 | several types of gateway, some of which strip off the MSB (Most |
8ca3766a | 1140 | Significant Bit). |
b73bfc1c | 1141 | |
cfb43547 DL |
1142 | There are two kinds of character sets: control character sets and |
1143 | graphic character sets. The former contain control characters such | |
4ed46869 | 1144 | as `newline' and `escape' to provide control functions (control |
39787efd | 1145 | functions are also provided by escape sequences). The latter |
cfb43547 | 1146 | contain graphic characters such as 'A' and '-'. Emacs recognizes |
4ed46869 KH |
1147 | two control character sets and many graphic character sets. |
1148 | ||
1149 | Graphic character sets are classified into one of the following | |
39787efd KH |
1150 | four classes, according to the number of bytes (DIMENSION) and |
1151 | number of characters in one dimension (CHARS) of the set: | |
1152 | - DIMENSION1_CHARS94 | |
1153 | - DIMENSION1_CHARS96 | |
1154 | - DIMENSION2_CHARS94 | |
1155 | - DIMENSION2_CHARS96 | |
1156 | ||
1157 | In addition, each character set is assigned an identification tag, | |
cfb43547 | 1158 | unique for each set, called the "final character" (denoted as <F> |
39787efd KH |
1159 | hereafter). The <F> of each character set is decided by ECMA(*) |
1160 | when it is registered in ISO. The code range of <F> is 0x30..0x7F | |
1161 | (0x30..0x3F are for private use only). | |
4ed46869 KH |
1162 | |
1163 | Note (*): ECMA = European Computer Manufacturers Association | |
1164 | ||
cfb43547 | 1165 | Here are examples of graphic character sets [NAME(<F>)]: |
4ed46869 KH |
1166 | o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ... |
1167 | o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ... | |
1168 | o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ... | |
1169 | o DIMENSION2_CHARS96 -- none for the moment | |
1170 | ||
39787efd | 1171 | A code area (1 byte=8 bits) is divided into 4 areas, C0, GL, C1, and GR. |
4ed46869 KH |
1172 | C0 [0x00..0x1F] -- control character plane 0 |
1173 | GL [0x20..0x7F] -- graphic character plane 0 | |
1174 | C1 [0x80..0x9F] -- control character plane 1 | |
1175 | GR [0xA0..0xFF] -- graphic character plane 1 | |
1176 | ||
1177 | A control character set is directly designated and invoked to C0 or | |
39787efd KH |
1178 | C1 by an escape sequence. The most common case is that: |
1179 | - ISO646's control character set is designated/invoked to C0, and | |
1180 | - ISO6429's control character set is designated/invoked to C1, | |
1181 | and usually these designations/invocations are omitted in encoded | |
1182 | text. In a 7-bit environment, only C0 can be used, and a control | |
1183 | character for C1 is encoded by an appropriate escape sequence to | |
1184 | fit into the environment. All control characters for C1 are | |
1185 | defined to have corresponding escape sequences. | |
4ed46869 KH |
1186 | |
1187 | A graphic character set is at first designated to one of four | |
1188 | graphic registers (G0 through G3), then these graphic registers are | |
1189 | invoked to GL or GR. These designations and invocations can be | |
1190 | done independently. The most common case is that G0 is invoked to | |
39787efd KH |
1191 | GL, G1 is invoked to GR, and ASCII is designated to G0. Usually |
1192 | these invocations and designations are omitted in encoded text. | |
1193 | In a 7-bit environment, only GL can be used. | |
4ed46869 | 1194 | |
39787efd KH |
1195 | When a graphic character set of CHARS94 is invoked to GL, codes |
1196 | 0x20 and 0x7F of the GL area work as control characters SPACE and | |
1197 | DEL respectively, and codes 0xA0 and 0xFF of the GR area should not | |
1198 | be used. | |
4ed46869 KH |
1199 | |
1200 | There are two ways of invocation: locking-shift and single-shift. | |
1201 | With locking-shift, the invocation lasts until the next different | |
39787efd KH |
1202 | invocation, whereas with single-shift, the invocation affects the |
1203 | following character only and doesn't affect the locking-shift | |
1204 | state. Invocations are done by the following control characters or | |
1205 | escape sequences: | |
4ed46869 KH |
1206 | |
1207 | ---------------------------------------------------------------------- | |
39787efd | 1208 | abbrev function cntrl escape seq description |
4ed46869 | 1209 | ---------------------------------------------------------------------- |
39787efd KH |
1210 | SI/LS0 (shift-in) 0x0F none invoke G0 into GL |
1211 | SO/LS1 (shift-out) 0x0E none invoke G1 into GL | |
1212 | LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL | |
1213 | LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL | |
1214 | LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*) | |
1215 | LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*) | |
1216 | LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*) | |
1217 | SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char | |
1218 | SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char | |
4ed46869 | 1219 | ---------------------------------------------------------------------- |
39787efd KH |
1220 | (*) These are not used by any known coding system. |
1221 | ||
1222 | Control characters for these functions are defined by macros | |
1223 | ISO_CODE_XXX in `coding.h'. | |
4ed46869 | 1224 | |
39787efd | 1225 | Designations are done by the following escape sequences: |
4ed46869 KH |
1226 | ---------------------------------------------------------------------- |
1227 | escape sequence description | |
1228 | ---------------------------------------------------------------------- | |
1229 | ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0 | |
1230 | ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1 | |
1231 | ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2 | |
1232 | ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3 | |
1233 | ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*) | |
1234 | ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1 | |
1235 | ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2 | |
1236 | ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3 | |
1237 | ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**) | |
1238 | ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1 | |
1239 | ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2 | |
1240 | ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3 | |
1241 | ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*) | |
1242 | ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1 | |
1243 | ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2 | |
1244 | ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3 | |
1245 | ---------------------------------------------------------------------- | |
1246 | ||
1247 | In this list, "DIMENSION1_CHARS94<F>" means a graphic character set | |
39787efd | 1248 | of dimension 1, chars 94, and final character <F>, etc... |
4ed46869 KH |
1249 | |
1250 | Note (*): Although these designations are not allowed in ISO2022, | |
1251 | Emacs accepts them on decoding, and produces them on encoding | |
39787efd | 1252 | CHARS96 character sets in a coding system which is characterized as |
4ed46869 KH |
1253 | 7-bit environment, non-locking-shift, and non-single-shift. |
1254 | ||
1255 | Note (**): If <F> is '@', 'A', or 'B', the intermediate character | |
39787efd | 1256 | '(' can be omitted. We refer to this as "short-form" hereafter. |
4ed46869 | 1257 | |
cfb43547 | 1258 | Now you may notice that there are a lot of ways of encoding the |
39787efd KH |
1259 | same multilingual text in ISO2022. Actually, there exist many |
1260 | coding systems such as Compound Text (used in X11's inter client | |
8ca3766a DL |
1261 | communication, ISO-2022-JP (used in Japanese Internet), ISO-2022-KR |
1262 | (used in Korean Internet), EUC (Extended UNIX Code, used in Asian | |
4ed46869 KH |
1263 | localized platforms), and all of these are variants of ISO2022. |
1264 | ||
1265 | In addition to the above, Emacs handles two more kinds of escape | |
1266 | sequences: ISO6429's direction specification and Emacs' private | |
1267 | sequence for specifying character composition. | |
1268 | ||
39787efd | 1269 | ISO6429's direction specification takes the following form: |
4ed46869 KH |
1270 | o CSI ']' -- end of the current direction |
1271 | o CSI '0' ']' -- end of the current direction | |
1272 | o CSI '1' ']' -- start of left-to-right text | |
1273 | o CSI '2' ']' -- start of right-to-left text | |
1274 | The control character CSI (0x9B: control sequence introducer) is | |
39787efd KH |
1275 | abbreviated to the escape sequence ESC '[' in a 7-bit environment. |
1276 | ||
1277 | Character composition specification takes the following form: | |
ec6d2bb8 KH |
1278 | o ESC '0' -- start relative composition |
1279 | o ESC '1' -- end composition | |
1280 | o ESC '2' -- start rule-base composition (*) | |
1281 | o ESC '3' -- start relative composition with alternate chars (**) | |
1282 | o ESC '4' -- start rule-base composition with alternate chars (**) | |
b73bfc1c | 1283 | Since these are not standard escape sequences of any ISO standard, |
cfb43547 | 1284 | the use of them with these meanings is restricted to Emacs only. |
ec6d2bb8 | 1285 | |
cfb43547 | 1286 | (*) This form is used only in Emacs 20.5 and older versions, |
b73bfc1c | 1287 | but the newer versions can safely decode it. |
cfb43547 | 1288 | (**) This form is used only in Emacs 21.1 and newer versions, |
b73bfc1c | 1289 | and the older versions can't decode it. |
ec6d2bb8 | 1290 | |
cfb43547 | 1291 | Here's a list of example usages of these composition escape |
b73bfc1c | 1292 | sequences (categorized by `enum composition_method'). |
ec6d2bb8 | 1293 | |
b73bfc1c | 1294 | COMPOSITION_RELATIVE: |
ec6d2bb8 | 1295 | ESC 0 CHAR [ CHAR ] ESC 1 |
8ca3766a | 1296 | COMPOSITION_WITH_RULE: |
ec6d2bb8 | 1297 | ESC 2 CHAR [ RULE CHAR ] ESC 1 |
b73bfc1c | 1298 | COMPOSITION_WITH_ALTCHARS: |
ec6d2bb8 | 1299 | ESC 3 ALTCHAR [ ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 |
b73bfc1c | 1300 | COMPOSITION_WITH_RULE_ALTCHARS: |
ec6d2bb8 | 1301 | ESC 4 ALTCHAR [ RULE ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 */ |
4ed46869 KH |
1302 | |
1303 | enum iso_code_class_type iso_code_class[256]; | |
1304 | ||
05e6f5dc KH |
1305 | #define CHARSET_OK(idx, charset, c) \ |
1306 | (coding_system_table[idx] \ | |
1307 | && (charset == CHARSET_ASCII \ | |
1308 | || (safe_chars = coding_safe_chars (coding_system_table[idx]), \ | |
1309 | CODING_SAFE_CHAR_P (safe_chars, c))) \ | |
1310 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding_system_table[idx], \ | |
1311 | charset) \ | |
1312 | != CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION)) | |
d46c5b12 KH |
1313 | |
1314 | #define SHIFT_OUT_OK(idx) \ | |
1315 | (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding_system_table[idx], 1) >= 0) | |
1316 | ||
4ed46869 | 1317 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
cfb43547 | 1318 | Check if a text is encoded in ISO2022. If it is, return an |
4ed46869 KH |
1319 | integer in which appropriate flag bits any of: |
1320 | CODING_CATEGORY_MASK_ISO_7 | |
d46c5b12 | 1321 | CODING_CATEGORY_MASK_ISO_7_TIGHT |
4ed46869 KH |
1322 | CODING_CATEGORY_MASK_ISO_8_1 |
1323 | CODING_CATEGORY_MASK_ISO_8_2 | |
7717c392 KH |
1324 | CODING_CATEGORY_MASK_ISO_7_ELSE |
1325 | CODING_CATEGORY_MASK_ISO_8_ELSE | |
4ed46869 KH |
1326 | are set. If a code which should never appear in ISO2022 is found, |
1327 | returns 0. */ | |
1328 | ||
0a28aafb KH |
1329 | static int |
1330 | detect_coding_iso2022 (src, src_end, multibytep) | |
4ed46869 | 1331 | unsigned char *src, *src_end; |
0a28aafb | 1332 | int multibytep; |
4ed46869 | 1333 | { |
d46c5b12 KH |
1334 | int mask = CODING_CATEGORY_MASK_ISO; |
1335 | int mask_found = 0; | |
f46869e4 | 1336 | int reg[4], shift_out = 0, single_shifting = 0; |
da55a2b7 | 1337 | int c, c1, charset; |
b73bfc1c KH |
1338 | /* Dummy for ONE_MORE_BYTE. */ |
1339 | struct coding_system dummy_coding; | |
1340 | struct coding_system *coding = &dummy_coding; | |
05e6f5dc | 1341 | Lisp_Object safe_chars; |
3f003981 | 1342 | |
d46c5b12 | 1343 | reg[0] = CHARSET_ASCII, reg[1] = reg[2] = reg[3] = -1; |
3f003981 | 1344 | while (mask && src < src_end) |
4ed46869 | 1345 | { |
0a28aafb | 1346 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
4ed46869 KH |
1347 | switch (c) |
1348 | { | |
1349 | case ISO_CODE_ESC: | |
74383408 KH |
1350 | if (inhibit_iso_escape_detection) |
1351 | break; | |
f46869e4 | 1352 | single_shifting = 0; |
0a28aafb | 1353 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
d46c5b12 | 1354 | if (c >= '(' && c <= '/') |
4ed46869 | 1355 | { |
bf9cdd4e | 1356 | /* Designation sequence for a charset of dimension 1. */ |
0a28aafb | 1357 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
d46c5b12 KH |
1358 | if (c1 < ' ' || c1 >= 0x80 |
1359 | || (charset = iso_charset_table[0][c >= ','][c1]) < 0) | |
1360 | /* Invalid designation sequence. Just ignore. */ | |
1361 | break; | |
1362 | reg[(c - '(') % 4] = charset; | |
bf9cdd4e KH |
1363 | } |
1364 | else if (c == '$') | |
1365 | { | |
1366 | /* Designation sequence for a charset of dimension 2. */ | |
0a28aafb | 1367 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
bf9cdd4e KH |
1368 | if (c >= '@' && c <= 'B') |
1369 | /* Designation for JISX0208.1978, GB2312, or JISX0208. */ | |
d46c5b12 | 1370 | reg[0] = charset = iso_charset_table[1][0][c]; |
bf9cdd4e | 1371 | else if (c >= '(' && c <= '/') |
bcf26d6a | 1372 | { |
0a28aafb | 1373 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
d46c5b12 KH |
1374 | if (c1 < ' ' || c1 >= 0x80 |
1375 | || (charset = iso_charset_table[1][c >= ','][c1]) < 0) | |
1376 | /* Invalid designation sequence. Just ignore. */ | |
1377 | break; | |
1378 | reg[(c - '(') % 4] = charset; | |
bcf26d6a | 1379 | } |
bf9cdd4e | 1380 | else |
d46c5b12 KH |
1381 | /* Invalid designation sequence. Just ignore. */ |
1382 | break; | |
1383 | } | |
ae9ff118 | 1384 | else if (c == 'N' || c == 'O') |
d46c5b12 | 1385 | { |
ae9ff118 KH |
1386 | /* ESC <Fe> for SS2 or SS3. */ |
1387 | mask &= CODING_CATEGORY_MASK_ISO_7_ELSE; | |
d46c5b12 | 1388 | break; |
4ed46869 | 1389 | } |
ec6d2bb8 KH |
1390 | else if (c >= '0' && c <= '4') |
1391 | { | |
1392 | /* ESC <Fp> for start/end composition. */ | |
1393 | mask_found |= CODING_CATEGORY_MASK_ISO; | |
1394 | break; | |
1395 | } | |
bf9cdd4e | 1396 | else |
d46c5b12 KH |
1397 | /* Invalid escape sequence. Just ignore. */ |
1398 | break; | |
1399 | ||
1400 | /* We found a valid designation sequence for CHARSET. */ | |
1401 | mask &= ~CODING_CATEGORY_MASK_ISO_8BIT; | |
05e6f5dc KH |
1402 | c = MAKE_CHAR (charset, 0, 0); |
1403 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7, charset, c)) | |
d46c5b12 KH |
1404 | mask_found |= CODING_CATEGORY_MASK_ISO_7; |
1405 | else | |
1406 | mask &= ~CODING_CATEGORY_MASK_ISO_7; | |
05e6f5dc | 1407 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_TIGHT, charset, c)) |
d46c5b12 KH |
1408 | mask_found |= CODING_CATEGORY_MASK_ISO_7_TIGHT; |
1409 | else | |
1410 | mask &= ~CODING_CATEGORY_MASK_ISO_7_TIGHT; | |
05e6f5dc | 1411 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_ELSE, charset, c)) |
ae9ff118 KH |
1412 | mask_found |= CODING_CATEGORY_MASK_ISO_7_ELSE; |
1413 | else | |
d46c5b12 | 1414 | mask &= ~CODING_CATEGORY_MASK_ISO_7_ELSE; |
05e6f5dc | 1415 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_8_ELSE, charset, c)) |
ae9ff118 KH |
1416 | mask_found |= CODING_CATEGORY_MASK_ISO_8_ELSE; |
1417 | else | |
d46c5b12 | 1418 | mask &= ~CODING_CATEGORY_MASK_ISO_8_ELSE; |
4ed46869 KH |
1419 | break; |
1420 | ||
4ed46869 | 1421 | case ISO_CODE_SO: |
74383408 KH |
1422 | if (inhibit_iso_escape_detection) |
1423 | break; | |
f46869e4 | 1424 | single_shifting = 0; |
d46c5b12 KH |
1425 | if (shift_out == 0 |
1426 | && (reg[1] >= 0 | |
1427 | || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_7_ELSE) | |
1428 | || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_8_ELSE))) | |
1429 | { | |
1430 | /* Locking shift out. */ | |
1431 | mask &= ~CODING_CATEGORY_MASK_ISO_7BIT; | |
1432 | mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT; | |
1433 | } | |
e0e989f6 KH |
1434 | break; |
1435 | ||
d46c5b12 | 1436 | case ISO_CODE_SI: |
74383408 KH |
1437 | if (inhibit_iso_escape_detection) |
1438 | break; | |
f46869e4 | 1439 | single_shifting = 0; |
d46c5b12 KH |
1440 | if (shift_out == 1) |
1441 | { | |
1442 | /* Locking shift in. */ | |
1443 | mask &= ~CODING_CATEGORY_MASK_ISO_7BIT; | |
1444 | mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT; | |
1445 | } | |
1446 | break; | |
1447 | ||
4ed46869 | 1448 | case ISO_CODE_CSI: |
f46869e4 | 1449 | single_shifting = 0; |
4ed46869 KH |
1450 | case ISO_CODE_SS2: |
1451 | case ISO_CODE_SS3: | |
3f003981 KH |
1452 | { |
1453 | int newmask = CODING_CATEGORY_MASK_ISO_8_ELSE; | |
1454 | ||
74383408 KH |
1455 | if (inhibit_iso_escape_detection) |
1456 | break; | |
70c22245 KH |
1457 | if (c != ISO_CODE_CSI) |
1458 | { | |
d46c5b12 KH |
1459 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1460 | & CODING_FLAG_ISO_SINGLE_SHIFT) | |
70c22245 | 1461 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1462 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1463 | & CODING_FLAG_ISO_SINGLE_SHIFT) | |
70c22245 | 1464 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
f46869e4 | 1465 | single_shifting = 1; |
70c22245 | 1466 | } |
3f003981 KH |
1467 | if (VECTORP (Vlatin_extra_code_table) |
1468 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
1469 | { | |
d46c5b12 KH |
1470 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1471 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 | 1472 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1473 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1474 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 KH |
1475 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
1476 | } | |
1477 | mask &= newmask; | |
d46c5b12 | 1478 | mask_found |= newmask; |
3f003981 KH |
1479 | } |
1480 | break; | |
4ed46869 KH |
1481 | |
1482 | default: | |
1483 | if (c < 0x80) | |
f46869e4 KH |
1484 | { |
1485 | single_shifting = 0; | |
1486 | break; | |
1487 | } | |
4ed46869 | 1488 | else if (c < 0xA0) |
c4825358 | 1489 | { |
f46869e4 | 1490 | single_shifting = 0; |
3f003981 KH |
1491 | if (VECTORP (Vlatin_extra_code_table) |
1492 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
c4825358 | 1493 | { |
3f003981 KH |
1494 | int newmask = 0; |
1495 | ||
d46c5b12 KH |
1496 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1497 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 | 1498 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1499 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1500 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 KH |
1501 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
1502 | mask &= newmask; | |
d46c5b12 | 1503 | mask_found |= newmask; |
c4825358 | 1504 | } |
3f003981 KH |
1505 | else |
1506 | return 0; | |
c4825358 | 1507 | } |
4ed46869 KH |
1508 | else |
1509 | { | |
d46c5b12 | 1510 | mask &= ~(CODING_CATEGORY_MASK_ISO_7BIT |
7717c392 | 1511 | | CODING_CATEGORY_MASK_ISO_7_ELSE); |
d46c5b12 | 1512 | mask_found |= CODING_CATEGORY_MASK_ISO_8_1; |
f46869e4 KH |
1513 | /* Check the length of succeeding codes of the range |
1514 | 0xA0..0FF. If the byte length is odd, we exclude | |
1515 | CODING_CATEGORY_MASK_ISO_8_2. We can check this only | |
1516 | when we are not single shifting. */ | |
b73bfc1c KH |
1517 | if (!single_shifting |
1518 | && mask & CODING_CATEGORY_MASK_ISO_8_2) | |
f46869e4 | 1519 | { |
e17de821 | 1520 | int i = 1; |
b73bfc1c KH |
1521 | while (src < src_end) |
1522 | { | |
0a28aafb | 1523 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
b73bfc1c KH |
1524 | if (c < 0xA0) |
1525 | break; | |
1526 | i++; | |
1527 | } | |
1528 | ||
1529 | if (i & 1 && src < src_end) | |
f46869e4 KH |
1530 | mask &= ~CODING_CATEGORY_MASK_ISO_8_2; |
1531 | else | |
1532 | mask_found |= CODING_CATEGORY_MASK_ISO_8_2; | |
1533 | } | |
4ed46869 KH |
1534 | } |
1535 | break; | |
1536 | } | |
1537 | } | |
b73bfc1c | 1538 | label_end_of_loop: |
d46c5b12 | 1539 | return (mask & mask_found); |
4ed46869 KH |
1540 | } |
1541 | ||
b73bfc1c KH |
1542 | /* Decode a character of which charset is CHARSET, the 1st position |
1543 | code is C1, the 2nd position code is C2, and return the decoded | |
1544 | character code. If the variable `translation_table' is non-nil, | |
1545 | returned the translated code. */ | |
ec6d2bb8 | 1546 | |
b73bfc1c KH |
1547 | #define DECODE_ISO_CHARACTER(charset, c1, c2) \ |
1548 | (NILP (translation_table) \ | |
1549 | ? MAKE_CHAR (charset, c1, c2) \ | |
1550 | : translate_char (translation_table, -1, charset, c1, c2)) | |
4ed46869 KH |
1551 | |
1552 | /* Set designation state into CODING. */ | |
d46c5b12 KH |
1553 | #define DECODE_DESIGNATION(reg, dimension, chars, final_char) \ |
1554 | do { \ | |
05e6f5dc | 1555 | int charset, c; \ |
944bd420 KH |
1556 | \ |
1557 | if (final_char < '0' || final_char >= 128) \ | |
1558 | goto label_invalid_code; \ | |
1559 | charset = ISO_CHARSET_TABLE (make_number (dimension), \ | |
1560 | make_number (chars), \ | |
1561 | make_number (final_char)); \ | |
05e6f5dc | 1562 | c = MAKE_CHAR (charset, 0, 0); \ |
d46c5b12 | 1563 | if (charset >= 0 \ |
704c5781 | 1564 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) == reg \ |
05e6f5dc | 1565 | || CODING_SAFE_CHAR_P (safe_chars, c))) \ |
d46c5b12 KH |
1566 | { \ |
1567 | if (coding->spec.iso2022.last_invalid_designation_register == 0 \ | |
1568 | && reg == 0 \ | |
1569 | && charset == CHARSET_ASCII) \ | |
1570 | { \ | |
1571 | /* We should insert this designation sequence as is so \ | |
1572 | that it is surely written back to a file. */ \ | |
1573 | coding->spec.iso2022.last_invalid_designation_register = -1; \ | |
1574 | goto label_invalid_code; \ | |
1575 | } \ | |
1576 | coding->spec.iso2022.last_invalid_designation_register = -1; \ | |
1577 | if ((coding->mode & CODING_MODE_DIRECTION) \ | |
1578 | && CHARSET_REVERSE_CHARSET (charset) >= 0) \ | |
1579 | charset = CHARSET_REVERSE_CHARSET (charset); \ | |
1580 | CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \ | |
1581 | } \ | |
1582 | else \ | |
1583 | { \ | |
1584 | coding->spec.iso2022.last_invalid_designation_register = reg; \ | |
1585 | goto label_invalid_code; \ | |
1586 | } \ | |
4ed46869 KH |
1587 | } while (0) |
1588 | ||
ec6d2bb8 KH |
1589 | /* Allocate a memory block for storing information about compositions. |
1590 | The block is chained to the already allocated blocks. */ | |
d46c5b12 | 1591 | |
33fb63eb | 1592 | void |
ec6d2bb8 | 1593 | coding_allocate_composition_data (coding, char_offset) |
d46c5b12 | 1594 | struct coding_system *coding; |
ec6d2bb8 | 1595 | int char_offset; |
d46c5b12 | 1596 | { |
ec6d2bb8 KH |
1597 | struct composition_data *cmp_data |
1598 | = (struct composition_data *) xmalloc (sizeof *cmp_data); | |
1599 | ||
1600 | cmp_data->char_offset = char_offset; | |
1601 | cmp_data->used = 0; | |
1602 | cmp_data->prev = coding->cmp_data; | |
1603 | cmp_data->next = NULL; | |
1604 | if (coding->cmp_data) | |
1605 | coding->cmp_data->next = cmp_data; | |
1606 | coding->cmp_data = cmp_data; | |
1607 | coding->cmp_data_start = 0; | |
1608 | } | |
d46c5b12 | 1609 | |
aa72b389 KH |
1610 | /* Handle composition start sequence ESC 0, ESC 2, ESC 3, or ESC 4. |
1611 | ESC 0 : relative composition : ESC 0 CHAR ... ESC 1 | |
1612 | ESC 2 : rulebase composition : ESC 2 CHAR RULE CHAR RULE ... CHAR ESC 1 | |
1613 | ESC 3 : altchar composition : ESC 3 ALT ... ESC 0 CHAR ... ESC 1 | |
1614 | ESC 4 : alt&rule composition : ESC 4 ALT RULE .. ALT ESC 0 CHAR ... ESC 1 | |
1615 | */ | |
ec6d2bb8 | 1616 | |
33fb63eb KH |
1617 | #define DECODE_COMPOSITION_START(c1) \ |
1618 | do { \ | |
1619 | if (coding->composing == COMPOSITION_DISABLED) \ | |
1620 | { \ | |
1621 | *dst++ = ISO_CODE_ESC; \ | |
1622 | *dst++ = c1 & 0x7f; \ | |
1623 | coding->produced_char += 2; \ | |
1624 | } \ | |
1625 | else if (!COMPOSING_P (coding)) \ | |
1626 | { \ | |
1627 | /* This is surely the start of a composition. We must be sure \ | |
1628 | that coding->cmp_data has enough space to store the \ | |
1629 | information about the composition. If not, terminate the \ | |
1630 | current decoding loop, allocate one more memory block for \ | |
8ca3766a | 1631 | coding->cmp_data in the caller, then start the decoding \ |
33fb63eb KH |
1632 | loop again. We can't allocate memory here directly because \ |
1633 | it may cause buffer/string relocation. */ \ | |
1634 | if (!coding->cmp_data \ | |
1635 | || (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH \ | |
1636 | >= COMPOSITION_DATA_SIZE)) \ | |
1637 | { \ | |
1638 | coding->result = CODING_FINISH_INSUFFICIENT_CMP; \ | |
1639 | goto label_end_of_loop; \ | |
1640 | } \ | |
1641 | coding->composing = (c1 == '0' ? COMPOSITION_RELATIVE \ | |
1642 | : c1 == '2' ? COMPOSITION_WITH_RULE \ | |
1643 | : c1 == '3' ? COMPOSITION_WITH_ALTCHARS \ | |
1644 | : COMPOSITION_WITH_RULE_ALTCHARS); \ | |
1645 | CODING_ADD_COMPOSITION_START (coding, coding->produced_char, \ | |
1646 | coding->composing); \ | |
1647 | coding->composition_rule_follows = 0; \ | |
1648 | } \ | |
1649 | else \ | |
1650 | { \ | |
1651 | /* We are already handling a composition. If the method is \ | |
1652 | the following two, the codes following the current escape \ | |
1653 | sequence are actual characters stored in a buffer. */ \ | |
1654 | if (coding->composing == COMPOSITION_WITH_ALTCHARS \ | |
1655 | || coding->composing == COMPOSITION_WITH_RULE_ALTCHARS) \ | |
1656 | { \ | |
1657 | coding->composing = COMPOSITION_RELATIVE; \ | |
1658 | coding->composition_rule_follows = 0; \ | |
1659 | } \ | |
1660 | } \ | |
ec6d2bb8 KH |
1661 | } while (0) |
1662 | ||
8ca3766a | 1663 | /* Handle composition end sequence ESC 1. */ |
ec6d2bb8 KH |
1664 | |
1665 | #define DECODE_COMPOSITION_END(c1) \ | |
1666 | do { \ | |
1667 | if (coding->composing == COMPOSITION_DISABLED) \ | |
1668 | { \ | |
1669 | *dst++ = ISO_CODE_ESC; \ | |
1670 | *dst++ = c1; \ | |
1671 | coding->produced_char += 2; \ | |
1672 | } \ | |
1673 | else \ | |
1674 | { \ | |
1675 | CODING_ADD_COMPOSITION_END (coding, coding->produced_char); \ | |
1676 | coding->composing = COMPOSITION_NO; \ | |
1677 | } \ | |
1678 | } while (0) | |
1679 | ||
1680 | /* Decode a composition rule from the byte C1 (and maybe one more byte | |
1681 | from SRC) and store one encoded composition rule in | |
1682 | coding->cmp_data. */ | |
1683 | ||
1684 | #define DECODE_COMPOSITION_RULE(c1) \ | |
1685 | do { \ | |
1686 | int rule = 0; \ | |
1687 | (c1) -= 32; \ | |
1688 | if (c1 < 81) /* old format (before ver.21) */ \ | |
1689 | { \ | |
1690 | int gref = (c1) / 9; \ | |
1691 | int nref = (c1) % 9; \ | |
1692 | if (gref == 4) gref = 10; \ | |
1693 | if (nref == 4) nref = 10; \ | |
1694 | rule = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
1695 | } \ | |
b73bfc1c | 1696 | else if (c1 < 93) /* new format (after ver.21) */ \ |
ec6d2bb8 KH |
1697 | { \ |
1698 | ONE_MORE_BYTE (c2); \ | |
1699 | rule = COMPOSITION_ENCODE_RULE (c1 - 81, c2 - 32); \ | |
1700 | } \ | |
1701 | CODING_ADD_COMPOSITION_COMPONENT (coding, rule); \ | |
1702 | coding->composition_rule_follows = 0; \ | |
1703 | } while (0) | |
88993dfd | 1704 | |
d46c5b12 | 1705 | |
4ed46869 KH |
1706 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
1707 | ||
b73bfc1c | 1708 | static void |
d46c5b12 | 1709 | decode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
1710 | struct coding_system *coding; |
1711 | unsigned char *source, *destination; | |
1712 | int src_bytes, dst_bytes; | |
4ed46869 KH |
1713 | { |
1714 | unsigned char *src = source; | |
1715 | unsigned char *src_end = source + src_bytes; | |
1716 | unsigned char *dst = destination; | |
1717 | unsigned char *dst_end = destination + dst_bytes; | |
4ed46869 KH |
1718 | /* Charsets invoked to graphic plane 0 and 1 respectively. */ |
1719 | int charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
1720 | int charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
b73bfc1c KH |
1721 | /* SRC_BASE remembers the start position in source in each loop. |
1722 | The loop will be exited when there's not enough source code | |
1723 | (within macro ONE_MORE_BYTE), or when there's not enough | |
1724 | destination area to produce a character (within macro | |
1725 | EMIT_CHAR). */ | |
1726 | unsigned char *src_base; | |
1727 | int c, charset; | |
1728 | Lisp_Object translation_table; | |
05e6f5dc KH |
1729 | Lisp_Object safe_chars; |
1730 | ||
1731 | safe_chars = coding_safe_chars (coding); | |
bdd9fb48 | 1732 | |
b73bfc1c KH |
1733 | if (NILP (Venable_character_translation)) |
1734 | translation_table = Qnil; | |
1735 | else | |
1736 | { | |
1737 | translation_table = coding->translation_table_for_decode; | |
1738 | if (NILP (translation_table)) | |
1739 | translation_table = Vstandard_translation_table_for_decode; | |
1740 | } | |
4ed46869 | 1741 | |
b73bfc1c KH |
1742 | coding->result = CODING_FINISH_NORMAL; |
1743 | ||
1744 | while (1) | |
4ed46869 | 1745 | { |
b73bfc1c KH |
1746 | int c1, c2; |
1747 | ||
1748 | src_base = src; | |
1749 | ONE_MORE_BYTE (c1); | |
4ed46869 | 1750 | |
ec6d2bb8 | 1751 | /* We produce no character or one character. */ |
4ed46869 KH |
1752 | switch (iso_code_class [c1]) |
1753 | { | |
1754 | case ISO_0x20_or_0x7F: | |
ec6d2bb8 KH |
1755 | if (COMPOSING_P (coding) && coding->composition_rule_follows) |
1756 | { | |
1757 | DECODE_COMPOSITION_RULE (c1); | |
b73bfc1c | 1758 | continue; |
ec6d2bb8 KH |
1759 | } |
1760 | if (charset0 < 0 || CHARSET_CHARS (charset0) == 94) | |
4ed46869 KH |
1761 | { |
1762 | /* This is SPACE or DEL. */ | |
b73bfc1c | 1763 | charset = CHARSET_ASCII; |
4ed46869 KH |
1764 | break; |
1765 | } | |
1766 | /* This is a graphic character, we fall down ... */ | |
1767 | ||
1768 | case ISO_graphic_plane_0: | |
ec6d2bb8 | 1769 | if (COMPOSING_P (coding) && coding->composition_rule_follows) |
b73bfc1c KH |
1770 | { |
1771 | DECODE_COMPOSITION_RULE (c1); | |
1772 | continue; | |
1773 | } | |
1774 | charset = charset0; | |
4ed46869 KH |
1775 | break; |
1776 | ||
1777 | case ISO_0xA0_or_0xFF: | |
d46c5b12 KH |
1778 | if (charset1 < 0 || CHARSET_CHARS (charset1) == 94 |
1779 | || coding->flags & CODING_FLAG_ISO_SEVEN_BITS) | |
fb88bf2d | 1780 | goto label_invalid_code; |
4ed46869 KH |
1781 | /* This is a graphic character, we fall down ... */ |
1782 | ||
1783 | case ISO_graphic_plane_1: | |
b73bfc1c | 1784 | if (charset1 < 0) |
fb88bf2d | 1785 | goto label_invalid_code; |
b73bfc1c | 1786 | charset = charset1; |
4ed46869 KH |
1787 | break; |
1788 | ||
b73bfc1c | 1789 | case ISO_control_0: |
ec6d2bb8 KH |
1790 | if (COMPOSING_P (coding)) |
1791 | DECODE_COMPOSITION_END ('1'); | |
1792 | ||
4ed46869 KH |
1793 | /* All ISO2022 control characters in this class have the |
1794 | same representation in Emacs internal format. */ | |
d46c5b12 KH |
1795 | if (c1 == '\n' |
1796 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
1797 | && (coding->eol_type == CODING_EOL_CR | |
1798 | || coding->eol_type == CODING_EOL_CRLF)) | |
1799 | { | |
b73bfc1c KH |
1800 | coding->result = CODING_FINISH_INCONSISTENT_EOL; |
1801 | goto label_end_of_loop; | |
d46c5b12 | 1802 | } |
b73bfc1c | 1803 | charset = CHARSET_ASCII; |
4ed46869 KH |
1804 | break; |
1805 | ||
b73bfc1c KH |
1806 | case ISO_control_1: |
1807 | if (COMPOSING_P (coding)) | |
1808 | DECODE_COMPOSITION_END ('1'); | |
1809 | goto label_invalid_code; | |
1810 | ||
4ed46869 | 1811 | case ISO_carriage_return: |
ec6d2bb8 KH |
1812 | if (COMPOSING_P (coding)) |
1813 | DECODE_COMPOSITION_END ('1'); | |
1814 | ||
4ed46869 | 1815 | if (coding->eol_type == CODING_EOL_CR) |
b73bfc1c | 1816 | c1 = '\n'; |
4ed46869 KH |
1817 | else if (coding->eol_type == CODING_EOL_CRLF) |
1818 | { | |
1819 | ONE_MORE_BYTE (c1); | |
b73bfc1c | 1820 | if (c1 != ISO_CODE_LF) |
4ed46869 | 1821 | { |
d46c5b12 KH |
1822 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) |
1823 | { | |
b73bfc1c KH |
1824 | coding->result = CODING_FINISH_INCONSISTENT_EOL; |
1825 | goto label_end_of_loop; | |
d46c5b12 | 1826 | } |
4ed46869 | 1827 | src--; |
b73bfc1c | 1828 | c1 = '\r'; |
4ed46869 KH |
1829 | } |
1830 | } | |
b73bfc1c | 1831 | charset = CHARSET_ASCII; |
4ed46869 KH |
1832 | break; |
1833 | ||
1834 | case ISO_shift_out: | |
d46c5b12 KH |
1835 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1836 | || CODING_SPEC_ISO_DESIGNATION (coding, 1) < 0) | |
1837 | goto label_invalid_code; | |
4ed46869 KH |
1838 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 1; |
1839 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
b73bfc1c | 1840 | continue; |
4ed46869 KH |
1841 | |
1842 | case ISO_shift_in: | |
d46c5b12 KH |
1843 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)) |
1844 | goto label_invalid_code; | |
4ed46869 KH |
1845 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; |
1846 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
b73bfc1c | 1847 | continue; |
4ed46869 KH |
1848 | |
1849 | case ISO_single_shift_2_7: | |
1850 | case ISO_single_shift_2: | |
d46c5b12 KH |
1851 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
1852 | goto label_invalid_code; | |
4ed46869 KH |
1853 | /* SS2 is handled as an escape sequence of ESC 'N' */ |
1854 | c1 = 'N'; | |
1855 | goto label_escape_sequence; | |
1856 | ||
1857 | case ISO_single_shift_3: | |
d46c5b12 KH |
1858 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
1859 | goto label_invalid_code; | |
4ed46869 KH |
1860 | /* SS2 is handled as an escape sequence of ESC 'O' */ |
1861 | c1 = 'O'; | |
1862 | goto label_escape_sequence; | |
1863 | ||
1864 | case ISO_control_sequence_introducer: | |
1865 | /* CSI is handled as an escape sequence of ESC '[' ... */ | |
1866 | c1 = '['; | |
1867 | goto label_escape_sequence; | |
1868 | ||
1869 | case ISO_escape: | |
1870 | ONE_MORE_BYTE (c1); | |
1871 | label_escape_sequence: | |
1872 | /* Escape sequences handled by Emacs are invocation, | |
1873 | designation, direction specification, and character | |
1874 | composition specification. */ | |
1875 | switch (c1) | |
1876 | { | |
1877 | case '&': /* revision of following character set */ | |
1878 | ONE_MORE_BYTE (c1); | |
1879 | if (!(c1 >= '@' && c1 <= '~')) | |
d46c5b12 | 1880 | goto label_invalid_code; |
4ed46869 KH |
1881 | ONE_MORE_BYTE (c1); |
1882 | if (c1 != ISO_CODE_ESC) | |
d46c5b12 | 1883 | goto label_invalid_code; |
4ed46869 KH |
1884 | ONE_MORE_BYTE (c1); |
1885 | goto label_escape_sequence; | |
1886 | ||
1887 | case '$': /* designation of 2-byte character set */ | |
d46c5b12 KH |
1888 | if (! (coding->flags & CODING_FLAG_ISO_DESIGNATION)) |
1889 | goto label_invalid_code; | |
4ed46869 KH |
1890 | ONE_MORE_BYTE (c1); |
1891 | if (c1 >= '@' && c1 <= 'B') | |
1892 | { /* designation of JISX0208.1978, GB2312.1980, | |
88993dfd | 1893 | or JISX0208.1980 */ |
4ed46869 KH |
1894 | DECODE_DESIGNATION (0, 2, 94, c1); |
1895 | } | |
1896 | else if (c1 >= 0x28 && c1 <= 0x2B) | |
1897 | { /* designation of DIMENSION2_CHARS94 character set */ | |
1898 | ONE_MORE_BYTE (c2); | |
1899 | DECODE_DESIGNATION (c1 - 0x28, 2, 94, c2); | |
1900 | } | |
1901 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
1902 | { /* designation of DIMENSION2_CHARS96 character set */ | |
1903 | ONE_MORE_BYTE (c2); | |
1904 | DECODE_DESIGNATION (c1 - 0x2C, 2, 96, c2); | |
1905 | } | |
1906 | else | |
d46c5b12 | 1907 | goto label_invalid_code; |
b73bfc1c KH |
1908 | /* We must update these variables now. */ |
1909 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
1910 | charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
1911 | continue; | |
4ed46869 KH |
1912 | |
1913 | case 'n': /* invocation of locking-shift-2 */ | |
d46c5b12 KH |
1914 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1915 | || CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0) | |
1916 | goto label_invalid_code; | |
4ed46869 | 1917 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 2; |
e0e989f6 | 1918 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); |
b73bfc1c | 1919 | continue; |
4ed46869 KH |
1920 | |
1921 | case 'o': /* invocation of locking-shift-3 */ | |
d46c5b12 KH |
1922 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1923 | || CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0) | |
1924 | goto label_invalid_code; | |
4ed46869 | 1925 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 3; |
e0e989f6 | 1926 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); |
b73bfc1c | 1927 | continue; |
4ed46869 KH |
1928 | |
1929 | case 'N': /* invocation of single-shift-2 */ | |
d46c5b12 KH |
1930 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) |
1931 | || CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0) | |
1932 | goto label_invalid_code; | |
4ed46869 | 1933 | charset = CODING_SPEC_ISO_DESIGNATION (coding, 2); |
b73bfc1c | 1934 | ONE_MORE_BYTE (c1); |
e7046a18 KH |
1935 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
1936 | goto label_invalid_code; | |
4ed46869 KH |
1937 | break; |
1938 | ||
1939 | case 'O': /* invocation of single-shift-3 */ | |
d46c5b12 KH |
1940 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) |
1941 | || CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0) | |
1942 | goto label_invalid_code; | |
4ed46869 | 1943 | charset = CODING_SPEC_ISO_DESIGNATION (coding, 3); |
b73bfc1c | 1944 | ONE_MORE_BYTE (c1); |
e7046a18 KH |
1945 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
1946 | goto label_invalid_code; | |
4ed46869 KH |
1947 | break; |
1948 | ||
ec6d2bb8 KH |
1949 | case '0': case '2': case '3': case '4': /* start composition */ |
1950 | DECODE_COMPOSITION_START (c1); | |
b73bfc1c | 1951 | continue; |
4ed46869 | 1952 | |
ec6d2bb8 KH |
1953 | case '1': /* end composition */ |
1954 | DECODE_COMPOSITION_END (c1); | |
b73bfc1c | 1955 | continue; |
4ed46869 KH |
1956 | |
1957 | case '[': /* specification of direction */ | |
d46c5b12 KH |
1958 | if (coding->flags & CODING_FLAG_ISO_NO_DIRECTION) |
1959 | goto label_invalid_code; | |
4ed46869 | 1960 | /* For the moment, nested direction is not supported. |
d46c5b12 | 1961 | So, `coding->mode & CODING_MODE_DIRECTION' zero means |
8ca3766a | 1962 | left-to-right, and nonzero means right-to-left. */ |
4ed46869 KH |
1963 | ONE_MORE_BYTE (c1); |
1964 | switch (c1) | |
1965 | { | |
1966 | case ']': /* end of the current direction */ | |
d46c5b12 | 1967 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 KH |
1968 | |
1969 | case '0': /* end of the current direction */ | |
1970 | case '1': /* start of left-to-right direction */ | |
1971 | ONE_MORE_BYTE (c1); | |
1972 | if (c1 == ']') | |
d46c5b12 | 1973 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 | 1974 | else |
d46c5b12 | 1975 | goto label_invalid_code; |
4ed46869 KH |
1976 | break; |
1977 | ||
1978 | case '2': /* start of right-to-left direction */ | |
1979 | ONE_MORE_BYTE (c1); | |
1980 | if (c1 == ']') | |
d46c5b12 | 1981 | coding->mode |= CODING_MODE_DIRECTION; |
4ed46869 | 1982 | else |
d46c5b12 | 1983 | goto label_invalid_code; |
4ed46869 KH |
1984 | break; |
1985 | ||
1986 | default: | |
d46c5b12 | 1987 | goto label_invalid_code; |
4ed46869 | 1988 | } |
b73bfc1c | 1989 | continue; |
4ed46869 KH |
1990 | |
1991 | default: | |
d46c5b12 KH |
1992 | if (! (coding->flags & CODING_FLAG_ISO_DESIGNATION)) |
1993 | goto label_invalid_code; | |
4ed46869 KH |
1994 | if (c1 >= 0x28 && c1 <= 0x2B) |
1995 | { /* designation of DIMENSION1_CHARS94 character set */ | |
1996 | ONE_MORE_BYTE (c2); | |
1997 | DECODE_DESIGNATION (c1 - 0x28, 1, 94, c2); | |
1998 | } | |
1999 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
2000 | { /* designation of DIMENSION1_CHARS96 character set */ | |
2001 | ONE_MORE_BYTE (c2); | |
2002 | DECODE_DESIGNATION (c1 - 0x2C, 1, 96, c2); | |
2003 | } | |
2004 | else | |
b73bfc1c KH |
2005 | goto label_invalid_code; |
2006 | /* We must update these variables now. */ | |
2007 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
2008 | charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
2009 | continue; | |
4ed46869 | 2010 | } |
b73bfc1c | 2011 | } |
4ed46869 | 2012 | |
b73bfc1c KH |
2013 | /* Now we know CHARSET and 1st position code C1 of a character. |
2014 | Produce a multibyte sequence for that character while getting | |
2015 | 2nd position code C2 if necessary. */ | |
2016 | if (CHARSET_DIMENSION (charset) == 2) | |
2017 | { | |
2018 | ONE_MORE_BYTE (c2); | |
2019 | if (c1 < 0x80 ? c2 < 0x20 || c2 >= 0x80 : c2 < 0xA0) | |
2020 | /* C2 is not in a valid range. */ | |
2021 | goto label_invalid_code; | |
4ed46869 | 2022 | } |
b73bfc1c KH |
2023 | c = DECODE_ISO_CHARACTER (charset, c1, c2); |
2024 | EMIT_CHAR (c); | |
4ed46869 KH |
2025 | continue; |
2026 | ||
b73bfc1c KH |
2027 | label_invalid_code: |
2028 | coding->errors++; | |
2029 | if (COMPOSING_P (coding)) | |
2030 | DECODE_COMPOSITION_END ('1'); | |
4ed46869 | 2031 | src = src_base; |
b73bfc1c KH |
2032 | c = *src++; |
2033 | EMIT_CHAR (c); | |
4ed46869 | 2034 | } |
fb88bf2d | 2035 | |
b73bfc1c KH |
2036 | label_end_of_loop: |
2037 | coding->consumed = coding->consumed_char = src_base - source; | |
d46c5b12 | 2038 | coding->produced = dst - destination; |
b73bfc1c | 2039 | return; |
4ed46869 KH |
2040 | } |
2041 | ||
b73bfc1c | 2042 | |
f4dee582 | 2043 | /* ISO2022 encoding stuff. */ |
4ed46869 KH |
2044 | |
2045 | /* | |
f4dee582 | 2046 | It is not enough to say just "ISO2022" on encoding, we have to |
cfb43547 | 2047 | specify more details. In Emacs, each ISO2022 coding system |
4ed46869 | 2048 | variant has the following specifications: |
8ca3766a | 2049 | 1. Initial designation to G0 through G3. |
4ed46869 KH |
2050 | 2. Allows short-form designation? |
2051 | 3. ASCII should be designated to G0 before control characters? | |
2052 | 4. ASCII should be designated to G0 at end of line? | |
2053 | 5. 7-bit environment or 8-bit environment? | |
2054 | 6. Use locking-shift? | |
2055 | 7. Use Single-shift? | |
2056 | And the following two are only for Japanese: | |
2057 | 8. Use ASCII in place of JIS0201-1976-Roman? | |
2058 | 9. Use JISX0208-1983 in place of JISX0208-1978? | |
2059 | These specifications are encoded in `coding->flags' as flag bits | |
2060 | defined by macros CODING_FLAG_ISO_XXX. See `coding.h' for more | |
f4dee582 | 2061 | details. |
4ed46869 KH |
2062 | */ |
2063 | ||
2064 | /* Produce codes (escape sequence) for designating CHARSET to graphic | |
b73bfc1c KH |
2065 | register REG at DST, and increment DST. If <final-char> of CHARSET is |
2066 | '@', 'A', or 'B' and the coding system CODING allows, produce | |
2067 | designation sequence of short-form. */ | |
4ed46869 KH |
2068 | |
2069 | #define ENCODE_DESIGNATION(charset, reg, coding) \ | |
2070 | do { \ | |
2071 | unsigned char final_char = CHARSET_ISO_FINAL_CHAR (charset); \ | |
2072 | char *intermediate_char_94 = "()*+"; \ | |
2073 | char *intermediate_char_96 = ",-./"; \ | |
70c22245 | 2074 | int revision = CODING_SPEC_ISO_REVISION_NUMBER(coding, charset); \ |
b73bfc1c | 2075 | \ |
70c22245 KH |
2076 | if (revision < 255) \ |
2077 | { \ | |
4ed46869 KH |
2078 | *dst++ = ISO_CODE_ESC; \ |
2079 | *dst++ = '&'; \ | |
70c22245 | 2080 | *dst++ = '@' + revision; \ |
4ed46869 | 2081 | } \ |
b73bfc1c | 2082 | *dst++ = ISO_CODE_ESC; \ |
4ed46869 KH |
2083 | if (CHARSET_DIMENSION (charset) == 1) \ |
2084 | { \ | |
2085 | if (CHARSET_CHARS (charset) == 94) \ | |
2086 | *dst++ = (unsigned char) (intermediate_char_94[reg]); \ | |
2087 | else \ | |
2088 | *dst++ = (unsigned char) (intermediate_char_96[reg]); \ | |
2089 | } \ | |
2090 | else \ | |
2091 | { \ | |
2092 | *dst++ = '$'; \ | |
2093 | if (CHARSET_CHARS (charset) == 94) \ | |
2094 | { \ | |
b73bfc1c KH |
2095 | if (! (coding->flags & CODING_FLAG_ISO_SHORT_FORM) \ |
2096 | || reg != 0 \ | |
2097 | || final_char < '@' || final_char > 'B') \ | |
4ed46869 KH |
2098 | *dst++ = (unsigned char) (intermediate_char_94[reg]); \ |
2099 | } \ | |
2100 | else \ | |
b73bfc1c | 2101 | *dst++ = (unsigned char) (intermediate_char_96[reg]); \ |
4ed46869 | 2102 | } \ |
b73bfc1c | 2103 | *dst++ = final_char; \ |
4ed46869 KH |
2104 | CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \ |
2105 | } while (0) | |
2106 | ||
2107 | /* The following two macros produce codes (control character or escape | |
2108 | sequence) for ISO2022 single-shift functions (single-shift-2 and | |
2109 | single-shift-3). */ | |
2110 | ||
2111 | #define ENCODE_SINGLE_SHIFT_2 \ | |
2112 | do { \ | |
2113 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2114 | *dst++ = ISO_CODE_ESC, *dst++ = 'N'; \ | |
2115 | else \ | |
b73bfc1c | 2116 | *dst++ = ISO_CODE_SS2; \ |
4ed46869 KH |
2117 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 1; \ |
2118 | } while (0) | |
2119 | ||
fb88bf2d KH |
2120 | #define ENCODE_SINGLE_SHIFT_3 \ |
2121 | do { \ | |
4ed46869 | 2122 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ |
fb88bf2d KH |
2123 | *dst++ = ISO_CODE_ESC, *dst++ = 'O'; \ |
2124 | else \ | |
b73bfc1c | 2125 | *dst++ = ISO_CODE_SS3; \ |
4ed46869 KH |
2126 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 1; \ |
2127 | } while (0) | |
2128 | ||
2129 | /* The following four macros produce codes (control character or | |
2130 | escape sequence) for ISO2022 locking-shift functions (shift-in, | |
2131 | shift-out, locking-shift-2, and locking-shift-3). */ | |
2132 | ||
b73bfc1c KH |
2133 | #define ENCODE_SHIFT_IN \ |
2134 | do { \ | |
2135 | *dst++ = ISO_CODE_SI; \ | |
4ed46869 KH |
2136 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; \ |
2137 | } while (0) | |
2138 | ||
b73bfc1c KH |
2139 | #define ENCODE_SHIFT_OUT \ |
2140 | do { \ | |
2141 | *dst++ = ISO_CODE_SO; \ | |
4ed46869 KH |
2142 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 1; \ |
2143 | } while (0) | |
2144 | ||
2145 | #define ENCODE_LOCKING_SHIFT_2 \ | |
2146 | do { \ | |
2147 | *dst++ = ISO_CODE_ESC, *dst++ = 'n'; \ | |
2148 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 2; \ | |
2149 | } while (0) | |
2150 | ||
b73bfc1c KH |
2151 | #define ENCODE_LOCKING_SHIFT_3 \ |
2152 | do { \ | |
2153 | *dst++ = ISO_CODE_ESC, *dst++ = 'o'; \ | |
4ed46869 KH |
2154 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 3; \ |
2155 | } while (0) | |
2156 | ||
f4dee582 RS |
2157 | /* Produce codes for a DIMENSION1 character whose character set is |
2158 | CHARSET and whose position-code is C1. Designation and invocation | |
4ed46869 KH |
2159 | sequences are also produced in advance if necessary. */ |
2160 | ||
6e85d753 KH |
2161 | #define ENCODE_ISO_CHARACTER_DIMENSION1(charset, c1) \ |
2162 | do { \ | |
2163 | if (CODING_SPEC_ISO_SINGLE_SHIFTING (coding)) \ | |
2164 | { \ | |
2165 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2166 | *dst++ = c1 & 0x7F; \ | |
2167 | else \ | |
2168 | *dst++ = c1 | 0x80; \ | |
2169 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
2170 | break; \ | |
2171 | } \ | |
2172 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 0)) \ | |
2173 | { \ | |
2174 | *dst++ = c1 & 0x7F; \ | |
2175 | break; \ | |
2176 | } \ | |
2177 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 1)) \ | |
2178 | { \ | |
2179 | *dst++ = c1 | 0x80; \ | |
2180 | break; \ | |
2181 | } \ | |
6e85d753 KH |
2182 | else \ |
2183 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
2184 | must invoke it, or, at first, designate it to some graphic \ | |
2185 | register. Then repeat the loop to actually produce the \ | |
2186 | character. */ \ | |
2187 | dst = encode_invocation_designation (charset, coding, dst); \ | |
4ed46869 KH |
2188 | } while (1) |
2189 | ||
f4dee582 RS |
2190 | /* Produce codes for a DIMENSION2 character whose character set is |
2191 | CHARSET and whose position-codes are C1 and C2. Designation and | |
4ed46869 KH |
2192 | invocation codes are also produced in advance if necessary. */ |
2193 | ||
6e85d753 KH |
2194 | #define ENCODE_ISO_CHARACTER_DIMENSION2(charset, c1, c2) \ |
2195 | do { \ | |
2196 | if (CODING_SPEC_ISO_SINGLE_SHIFTING (coding)) \ | |
2197 | { \ | |
2198 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2199 | *dst++ = c1 & 0x7F, *dst++ = c2 & 0x7F; \ | |
2200 | else \ | |
2201 | *dst++ = c1 | 0x80, *dst++ = c2 | 0x80; \ | |
2202 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
2203 | break; \ | |
2204 | } \ | |
2205 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 0)) \ | |
2206 | { \ | |
2207 | *dst++ = c1 & 0x7F, *dst++= c2 & 0x7F; \ | |
2208 | break; \ | |
2209 | } \ | |
2210 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 1)) \ | |
2211 | { \ | |
2212 | *dst++ = c1 | 0x80, *dst++= c2 | 0x80; \ | |
2213 | break; \ | |
2214 | } \ | |
6e85d753 KH |
2215 | else \ |
2216 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
2217 | must invoke it, or, at first, designate it to some graphic \ | |
2218 | register. Then repeat the loop to actually produce the \ | |
2219 | character. */ \ | |
2220 | dst = encode_invocation_designation (charset, coding, dst); \ | |
4ed46869 KH |
2221 | } while (1) |
2222 | ||
05e6f5dc KH |
2223 | #define ENCODE_ISO_CHARACTER(c) \ |
2224 | do { \ | |
2225 | int charset, c1, c2; \ | |
2226 | \ | |
2227 | SPLIT_CHAR (c, charset, c1, c2); \ | |
2228 | if (CHARSET_DEFINED_P (charset)) \ | |
2229 | { \ | |
2230 | if (CHARSET_DIMENSION (charset) == 1) \ | |
2231 | { \ | |
2232 | if (charset == CHARSET_ASCII \ | |
2233 | && coding->flags & CODING_FLAG_ISO_USE_ROMAN) \ | |
2234 | charset = charset_latin_jisx0201; \ | |
2235 | ENCODE_ISO_CHARACTER_DIMENSION1 (charset, c1); \ | |
2236 | } \ | |
2237 | else \ | |
2238 | { \ | |
2239 | if (charset == charset_jisx0208 \ | |
2240 | && coding->flags & CODING_FLAG_ISO_USE_OLDJIS) \ | |
2241 | charset = charset_jisx0208_1978; \ | |
2242 | ENCODE_ISO_CHARACTER_DIMENSION2 (charset, c1, c2); \ | |
2243 | } \ | |
2244 | } \ | |
2245 | else \ | |
2246 | { \ | |
2247 | *dst++ = c1; \ | |
2248 | if (c2 >= 0) \ | |
2249 | *dst++ = c2; \ | |
2250 | } \ | |
2251 | } while (0) | |
2252 | ||
2253 | ||
2254 | /* Instead of encoding character C, produce one or two `?'s. */ | |
2255 | ||
2256 | #define ENCODE_UNSAFE_CHARACTER(c) \ | |
6f551029 | 2257 | do { \ |
05e6f5dc KH |
2258 | ENCODE_ISO_CHARACTER (CODING_INHIBIT_CHARACTER_SUBSTITUTION); \ |
2259 | if (CHARSET_WIDTH (CHAR_CHARSET (c)) > 1) \ | |
2260 | ENCODE_ISO_CHARACTER (CODING_INHIBIT_CHARACTER_SUBSTITUTION); \ | |
84fbb8a0 | 2261 | } while (0) |
bdd9fb48 | 2262 | |
05e6f5dc | 2263 | |
4ed46869 KH |
2264 | /* Produce designation and invocation codes at a place pointed by DST |
2265 | to use CHARSET. The element `spec.iso2022' of *CODING is updated. | |
2266 | Return new DST. */ | |
2267 | ||
2268 | unsigned char * | |
2269 | encode_invocation_designation (charset, coding, dst) | |
2270 | int charset; | |
2271 | struct coding_system *coding; | |
2272 | unsigned char *dst; | |
2273 | { | |
2274 | int reg; /* graphic register number */ | |
2275 | ||
2276 | /* At first, check designations. */ | |
2277 | for (reg = 0; reg < 4; reg++) | |
2278 | if (charset == CODING_SPEC_ISO_DESIGNATION (coding, reg)) | |
2279 | break; | |
2280 | ||
2281 | if (reg >= 4) | |
2282 | { | |
2283 | /* CHARSET is not yet designated to any graphic registers. */ | |
2284 | /* At first check the requested designation. */ | |
2285 | reg = CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset); | |
1ba9e4ab KH |
2286 | if (reg == CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION) |
2287 | /* Since CHARSET requests no special designation, designate it | |
2288 | to graphic register 0. */ | |
4ed46869 KH |
2289 | reg = 0; |
2290 | ||
2291 | ENCODE_DESIGNATION (charset, reg, coding); | |
2292 | } | |
2293 | ||
2294 | if (CODING_SPEC_ISO_INVOCATION (coding, 0) != reg | |
2295 | && CODING_SPEC_ISO_INVOCATION (coding, 1) != reg) | |
2296 | { | |
2297 | /* Since the graphic register REG is not invoked to any graphic | |
2298 | planes, invoke it to graphic plane 0. */ | |
2299 | switch (reg) | |
2300 | { | |
2301 | case 0: /* graphic register 0 */ | |
2302 | ENCODE_SHIFT_IN; | |
2303 | break; | |
2304 | ||
2305 | case 1: /* graphic register 1 */ | |
2306 | ENCODE_SHIFT_OUT; | |
2307 | break; | |
2308 | ||
2309 | case 2: /* graphic register 2 */ | |
2310 | if (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) | |
2311 | ENCODE_SINGLE_SHIFT_2; | |
2312 | else | |
2313 | ENCODE_LOCKING_SHIFT_2; | |
2314 | break; | |
2315 | ||
2316 | case 3: /* graphic register 3 */ | |
2317 | if (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) | |
2318 | ENCODE_SINGLE_SHIFT_3; | |
2319 | else | |
2320 | ENCODE_LOCKING_SHIFT_3; | |
2321 | break; | |
2322 | } | |
2323 | } | |
b73bfc1c | 2324 | |
4ed46869 KH |
2325 | return dst; |
2326 | } | |
2327 | ||
ec6d2bb8 KH |
2328 | /* Produce 2-byte codes for encoded composition rule RULE. */ |
2329 | ||
2330 | #define ENCODE_COMPOSITION_RULE(rule) \ | |
2331 | do { \ | |
2332 | int gref, nref; \ | |
2333 | COMPOSITION_DECODE_RULE (rule, gref, nref); \ | |
2334 | *dst++ = 32 + 81 + gref; \ | |
2335 | *dst++ = 32 + nref; \ | |
2336 | } while (0) | |
2337 | ||
2338 | /* Produce codes for indicating the start of a composition sequence | |
2339 | (ESC 0, ESC 3, or ESC 4). DATA points to an array of integers | |
2340 | which specify information about the composition. See the comment | |
2341 | in coding.h for the format of DATA. */ | |
2342 | ||
2343 | #define ENCODE_COMPOSITION_START(coding, data) \ | |
2344 | do { \ | |
2345 | coding->composing = data[3]; \ | |
2346 | *dst++ = ISO_CODE_ESC; \ | |
2347 | if (coding->composing == COMPOSITION_RELATIVE) \ | |
2348 | *dst++ = '0'; \ | |
2349 | else \ | |
2350 | { \ | |
2351 | *dst++ = (coding->composing == COMPOSITION_WITH_ALTCHARS \ | |
2352 | ? '3' : '4'); \ | |
2353 | coding->cmp_data_index = coding->cmp_data_start + 4; \ | |
2354 | coding->composition_rule_follows = 0; \ | |
2355 | } \ | |
2356 | } while (0) | |
2357 | ||
2358 | /* Produce codes for indicating the end of the current composition. */ | |
2359 | ||
2360 | #define ENCODE_COMPOSITION_END(coding, data) \ | |
2361 | do { \ | |
2362 | *dst++ = ISO_CODE_ESC; \ | |
2363 | *dst++ = '1'; \ | |
2364 | coding->cmp_data_start += data[0]; \ | |
2365 | coding->composing = COMPOSITION_NO; \ | |
2366 | if (coding->cmp_data_start == coding->cmp_data->used \ | |
2367 | && coding->cmp_data->next) \ | |
2368 | { \ | |
2369 | coding->cmp_data = coding->cmp_data->next; \ | |
2370 | coding->cmp_data_start = 0; \ | |
2371 | } \ | |
2372 | } while (0) | |
2373 | ||
2374 | /* Produce composition start sequence ESC 0. Here, this sequence | |
2375 | doesn't mean the start of a new composition but means that we have | |
2376 | just produced components (alternate chars and composition rules) of | |
2377 | the composition and the actual text follows in SRC. */ | |
2378 | ||
2379 | #define ENCODE_COMPOSITION_FAKE_START(coding) \ | |
2380 | do { \ | |
2381 | *dst++ = ISO_CODE_ESC; \ | |
2382 | *dst++ = '0'; \ | |
2383 | coding->composing = COMPOSITION_RELATIVE; \ | |
2384 | } while (0) | |
4ed46869 KH |
2385 | |
2386 | /* The following three macros produce codes for indicating direction | |
2387 | of text. */ | |
b73bfc1c KH |
2388 | #define ENCODE_CONTROL_SEQUENCE_INTRODUCER \ |
2389 | do { \ | |
4ed46869 | 2390 | if (coding->flags == CODING_FLAG_ISO_SEVEN_BITS) \ |
b73bfc1c KH |
2391 | *dst++ = ISO_CODE_ESC, *dst++ = '['; \ |
2392 | else \ | |
2393 | *dst++ = ISO_CODE_CSI; \ | |
4ed46869 KH |
2394 | } while (0) |
2395 | ||
2396 | #define ENCODE_DIRECTION_R2L \ | |
b73bfc1c | 2397 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst), *dst++ = '2', *dst++ = ']' |
4ed46869 KH |
2398 | |
2399 | #define ENCODE_DIRECTION_L2R \ | |
b73bfc1c | 2400 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst), *dst++ = '0', *dst++ = ']' |
4ed46869 KH |
2401 | |
2402 | /* Produce codes for designation and invocation to reset the graphic | |
2403 | planes and registers to initial state. */ | |
e0e989f6 KH |
2404 | #define ENCODE_RESET_PLANE_AND_REGISTER \ |
2405 | do { \ | |
2406 | int reg; \ | |
2407 | if (CODING_SPEC_ISO_INVOCATION (coding, 0) != 0) \ | |
2408 | ENCODE_SHIFT_IN; \ | |
2409 | for (reg = 0; reg < 4; reg++) \ | |
2410 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg) >= 0 \ | |
2411 | && (CODING_SPEC_ISO_DESIGNATION (coding, reg) \ | |
2412 | != CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg))) \ | |
2413 | ENCODE_DESIGNATION \ | |
2414 | (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg), reg, coding); \ | |
4ed46869 KH |
2415 | } while (0) |
2416 | ||
bdd9fb48 | 2417 | /* Produce designation sequences of charsets in the line started from |
b73bfc1c | 2418 | SRC to a place pointed by DST, and return updated DST. |
bdd9fb48 KH |
2419 | |
2420 | If the current block ends before any end-of-line, we may fail to | |
d46c5b12 KH |
2421 | find all the necessary designations. */ |
2422 | ||
b73bfc1c KH |
2423 | static unsigned char * |
2424 | encode_designation_at_bol (coding, translation_table, src, src_end, dst) | |
e0e989f6 | 2425 | struct coding_system *coding; |
b73bfc1c KH |
2426 | Lisp_Object translation_table; |
2427 | unsigned char *src, *src_end, *dst; | |
e0e989f6 | 2428 | { |
bdd9fb48 KH |
2429 | int charset, c, found = 0, reg; |
2430 | /* Table of charsets to be designated to each graphic register. */ | |
2431 | int r[4]; | |
bdd9fb48 KH |
2432 | |
2433 | for (reg = 0; reg < 4; reg++) | |
2434 | r[reg] = -1; | |
2435 | ||
b73bfc1c | 2436 | while (found < 4) |
e0e989f6 | 2437 | { |
b73bfc1c KH |
2438 | ONE_MORE_CHAR (c); |
2439 | if (c == '\n') | |
2440 | break; | |
bdd9fb48 | 2441 | |
b73bfc1c | 2442 | charset = CHAR_CHARSET (c); |
e0e989f6 | 2443 | reg = CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset); |
d46c5b12 | 2444 | if (reg != CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION && r[reg] < 0) |
bdd9fb48 KH |
2445 | { |
2446 | found++; | |
2447 | r[reg] = charset; | |
2448 | } | |
bdd9fb48 KH |
2449 | } |
2450 | ||
b73bfc1c | 2451 | label_end_of_loop: |
bdd9fb48 KH |
2452 | if (found) |
2453 | { | |
2454 | for (reg = 0; reg < 4; reg++) | |
2455 | if (r[reg] >= 0 | |
2456 | && CODING_SPEC_ISO_DESIGNATION (coding, reg) != r[reg]) | |
2457 | ENCODE_DESIGNATION (r[reg], reg, coding); | |
e0e989f6 | 2458 | } |
b73bfc1c KH |
2459 | |
2460 | return dst; | |
e0e989f6 KH |
2461 | } |
2462 | ||
4ed46869 KH |
2463 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */ |
2464 | ||
b73bfc1c | 2465 | static void |
d46c5b12 | 2466 | encode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
2467 | struct coding_system *coding; |
2468 | unsigned char *source, *destination; | |
2469 | int src_bytes, dst_bytes; | |
4ed46869 KH |
2470 | { |
2471 | unsigned char *src = source; | |
2472 | unsigned char *src_end = source + src_bytes; | |
2473 | unsigned char *dst = destination; | |
2474 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c | 2475 | /* Since the maximum bytes produced by each loop is 20, we subtract 19 |
4ed46869 KH |
2476 | from DST_END to assure overflow checking is necessary only at the |
2477 | head of loop. */ | |
b73bfc1c KH |
2478 | unsigned char *adjusted_dst_end = dst_end - 19; |
2479 | /* SRC_BASE remembers the start position in source in each loop. | |
2480 | The loop will be exited when there's not enough source text to | |
2481 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
2482 | there's not enough destination area to produce encoded codes | |
2483 | (within macro EMIT_BYTES). */ | |
2484 | unsigned char *src_base; | |
2485 | int c; | |
2486 | Lisp_Object translation_table; | |
05e6f5dc KH |
2487 | Lisp_Object safe_chars; |
2488 | ||
2489 | safe_chars = coding_safe_chars (coding); | |
bdd9fb48 | 2490 | |
b73bfc1c KH |
2491 | if (NILP (Venable_character_translation)) |
2492 | translation_table = Qnil; | |
2493 | else | |
2494 | { | |
2495 | translation_table = coding->translation_table_for_encode; | |
2496 | if (NILP (translation_table)) | |
2497 | translation_table = Vstandard_translation_table_for_encode; | |
2498 | } | |
4ed46869 | 2499 | |
d46c5b12 | 2500 | coding->consumed_char = 0; |
b73bfc1c KH |
2501 | coding->errors = 0; |
2502 | while (1) | |
4ed46869 | 2503 | { |
b73bfc1c KH |
2504 | src_base = src; |
2505 | ||
2506 | if (dst >= (dst_bytes ? adjusted_dst_end : (src - 19))) | |
2507 | { | |
2508 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
2509 | break; | |
2510 | } | |
4ed46869 | 2511 | |
e0e989f6 KH |
2512 | if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL |
2513 | && CODING_SPEC_ISO_BOL (coding)) | |
2514 | { | |
bdd9fb48 | 2515 | /* We have to produce designation sequences if any now. */ |
b73bfc1c KH |
2516 | dst = encode_designation_at_bol (coding, translation_table, |
2517 | src, src_end, dst); | |
e0e989f6 KH |
2518 | CODING_SPEC_ISO_BOL (coding) = 0; |
2519 | } | |
2520 | ||
ec6d2bb8 KH |
2521 | /* Check composition start and end. */ |
2522 | if (coding->composing != COMPOSITION_DISABLED | |
2523 | && coding->cmp_data_start < coding->cmp_data->used) | |
4ed46869 | 2524 | { |
ec6d2bb8 KH |
2525 | struct composition_data *cmp_data = coding->cmp_data; |
2526 | int *data = cmp_data->data + coding->cmp_data_start; | |
2527 | int this_pos = cmp_data->char_offset + coding->consumed_char; | |
2528 | ||
2529 | if (coding->composing == COMPOSITION_RELATIVE) | |
4ed46869 | 2530 | { |
ec6d2bb8 KH |
2531 | if (this_pos == data[2]) |
2532 | { | |
2533 | ENCODE_COMPOSITION_END (coding, data); | |
2534 | cmp_data = coding->cmp_data; | |
2535 | data = cmp_data->data + coding->cmp_data_start; | |
2536 | } | |
4ed46869 | 2537 | } |
ec6d2bb8 | 2538 | else if (COMPOSING_P (coding)) |
4ed46869 | 2539 | { |
ec6d2bb8 KH |
2540 | /* COMPOSITION_WITH_ALTCHARS or COMPOSITION_WITH_RULE_ALTCHAR */ |
2541 | if (coding->cmp_data_index == coding->cmp_data_start + data[0]) | |
2542 | /* We have consumed components of the composition. | |
8ca3766a | 2543 | What follows in SRC is the composition's base |
ec6d2bb8 KH |
2544 | text. */ |
2545 | ENCODE_COMPOSITION_FAKE_START (coding); | |
2546 | else | |
4ed46869 | 2547 | { |
ec6d2bb8 KH |
2548 | int c = cmp_data->data[coding->cmp_data_index++]; |
2549 | if (coding->composition_rule_follows) | |
2550 | { | |
2551 | ENCODE_COMPOSITION_RULE (c); | |
2552 | coding->composition_rule_follows = 0; | |
2553 | } | |
2554 | else | |
2555 | { | |
05e6f5dc KH |
2556 | if (coding->flags & CODING_FLAG_ISO_SAFE |
2557 | && ! CODING_SAFE_CHAR_P (safe_chars, c)) | |
2558 | ENCODE_UNSAFE_CHARACTER (c); | |
2559 | else | |
2560 | ENCODE_ISO_CHARACTER (c); | |
ec6d2bb8 KH |
2561 | if (coding->composing == COMPOSITION_WITH_RULE_ALTCHARS) |
2562 | coding->composition_rule_follows = 1; | |
2563 | } | |
4ed46869 KH |
2564 | continue; |
2565 | } | |
ec6d2bb8 KH |
2566 | } |
2567 | if (!COMPOSING_P (coding)) | |
2568 | { | |
2569 | if (this_pos == data[1]) | |
4ed46869 | 2570 | { |
ec6d2bb8 KH |
2571 | ENCODE_COMPOSITION_START (coding, data); |
2572 | continue; | |
4ed46869 | 2573 | } |
4ed46869 KH |
2574 | } |
2575 | } | |
ec6d2bb8 | 2576 | |
b73bfc1c | 2577 | ONE_MORE_CHAR (c); |
4ed46869 | 2578 | |
b73bfc1c KH |
2579 | /* Now encode the character C. */ |
2580 | if (c < 0x20 || c == 0x7F) | |
2581 | { | |
2582 | if (c == '\r') | |
19a8d9e0 | 2583 | { |
b73bfc1c KH |
2584 | if (! (coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) |
2585 | { | |
2586 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL) | |
2587 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2588 | *dst++ = c; | |
2589 | continue; | |
2590 | } | |
2591 | /* fall down to treat '\r' as '\n' ... */ | |
2592 | c = '\n'; | |
19a8d9e0 | 2593 | } |
b73bfc1c | 2594 | if (c == '\n') |
19a8d9e0 | 2595 | { |
b73bfc1c KH |
2596 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_EOL) |
2597 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2598 | if (coding->flags & CODING_FLAG_ISO_INIT_AT_BOL) | |
2599 | bcopy (coding->spec.iso2022.initial_designation, | |
2600 | coding->spec.iso2022.current_designation, | |
2601 | sizeof coding->spec.iso2022.initial_designation); | |
2602 | if (coding->eol_type == CODING_EOL_LF | |
2603 | || coding->eol_type == CODING_EOL_UNDECIDED) | |
2604 | *dst++ = ISO_CODE_LF; | |
2605 | else if (coding->eol_type == CODING_EOL_CRLF) | |
2606 | *dst++ = ISO_CODE_CR, *dst++ = ISO_CODE_LF; | |
2607 | else | |
2608 | *dst++ = ISO_CODE_CR; | |
2609 | CODING_SPEC_ISO_BOL (coding) = 1; | |
19a8d9e0 | 2610 | } |
b73bfc1c | 2611 | else |
19a8d9e0 | 2612 | { |
b73bfc1c KH |
2613 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL) |
2614 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2615 | *dst++ = c; | |
19a8d9e0 | 2616 | } |
4ed46869 | 2617 | } |
b73bfc1c | 2618 | else if (ASCII_BYTE_P (c)) |
05e6f5dc | 2619 | ENCODE_ISO_CHARACTER (c); |
b73bfc1c | 2620 | else if (SINGLE_BYTE_CHAR_P (c)) |
88993dfd | 2621 | { |
b73bfc1c KH |
2622 | *dst++ = c; |
2623 | coding->errors++; | |
88993dfd | 2624 | } |
05e6f5dc KH |
2625 | else if (coding->flags & CODING_FLAG_ISO_SAFE |
2626 | && ! CODING_SAFE_CHAR_P (safe_chars, c)) | |
2627 | ENCODE_UNSAFE_CHARACTER (c); | |
b73bfc1c | 2628 | else |
05e6f5dc | 2629 | ENCODE_ISO_CHARACTER (c); |
b73bfc1c KH |
2630 | |
2631 | coding->consumed_char++; | |
84fbb8a0 | 2632 | } |
b73bfc1c KH |
2633 | |
2634 | label_end_of_loop: | |
2635 | coding->consumed = src_base - source; | |
d46c5b12 | 2636 | coding->produced = coding->produced_char = dst - destination; |
4ed46869 KH |
2637 | } |
2638 | ||
2639 | \f | |
2640 | /*** 4. SJIS and BIG5 handlers ***/ | |
2641 | ||
cfb43547 | 2642 | /* Although SJIS and BIG5 are not ISO coding systems, they are used |
4ed46869 KH |
2643 | quite widely. So, for the moment, Emacs supports them in the bare |
2644 | C code. But, in the future, they may be supported only by CCL. */ | |
2645 | ||
2646 | /* SJIS is a coding system encoding three character sets: ASCII, right | |
2647 | half of JISX0201-Kana, and JISX0208. An ASCII character is encoded | |
2648 | as is. A character of charset katakana-jisx0201 is encoded by | |
2649 | "position-code + 0x80". A character of charset japanese-jisx0208 | |
2650 | is encoded in 2-byte but two position-codes are divided and shifted | |
cfb43547 | 2651 | so that it fits in the range below. |
4ed46869 KH |
2652 | |
2653 | --- CODE RANGE of SJIS --- | |
2654 | (character set) (range) | |
2655 | ASCII 0x00 .. 0x7F | |
682169fe | 2656 | KATAKANA-JISX0201 0xA1 .. 0xDF |
c28a9453 | 2657 | JISX0208 (1st byte) 0x81 .. 0x9F and 0xE0 .. 0xEF |
d14d03ac | 2658 | (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC |
4ed46869 KH |
2659 | ------------------------------- |
2660 | ||
2661 | */ | |
2662 | ||
2663 | /* BIG5 is a coding system encoding two character sets: ASCII and | |
2664 | Big5. An ASCII character is encoded as is. Big5 is a two-byte | |
cfb43547 | 2665 | character set and is encoded in two bytes. |
4ed46869 KH |
2666 | |
2667 | --- CODE RANGE of BIG5 --- | |
2668 | (character set) (range) | |
2669 | ASCII 0x00 .. 0x7F | |
2670 | Big5 (1st byte) 0xA1 .. 0xFE | |
2671 | (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE | |
2672 | -------------------------- | |
2673 | ||
2674 | Since the number of characters in Big5 is larger than maximum | |
2675 | characters in Emacs' charset (96x96), it can't be handled as one | |
2676 | charset. So, in Emacs, Big5 is divided into two: `charset-big5-1' | |
2677 | and `charset-big5-2'. Both are DIMENSION2 and CHARS94. The former | |
2678 | contains frequently used characters and the latter contains less | |
2679 | frequently used characters. */ | |
2680 | ||
2681 | /* Macros to decode or encode a character of Big5 in BIG5. B1 and B2 | |
2682 | are the 1st and 2nd position-codes of Big5 in BIG5 coding system. | |
2683 | C1 and C2 are the 1st and 2nd position-codes of of Emacs' internal | |
2684 | format. CHARSET is `charset_big5_1' or `charset_big5_2'. */ | |
2685 | ||
2686 | /* Number of Big5 characters which have the same code in 1st byte. */ | |
2687 | #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40) | |
2688 | ||
2689 | #define DECODE_BIG5(b1, b2, charset, c1, c2) \ | |
2690 | do { \ | |
2691 | unsigned int temp \ | |
2692 | = (b1 - 0xA1) * BIG5_SAME_ROW + b2 - (b2 < 0x7F ? 0x40 : 0x62); \ | |
2693 | if (b1 < 0xC9) \ | |
2694 | charset = charset_big5_1; \ | |
2695 | else \ | |
2696 | { \ | |
2697 | charset = charset_big5_2; \ | |
2698 | temp -= (0xC9 - 0xA1) * BIG5_SAME_ROW; \ | |
2699 | } \ | |
2700 | c1 = temp / (0xFF - 0xA1) + 0x21; \ | |
2701 | c2 = temp % (0xFF - 0xA1) + 0x21; \ | |
2702 | } while (0) | |
2703 | ||
2704 | #define ENCODE_BIG5(charset, c1, c2, b1, b2) \ | |
2705 | do { \ | |
2706 | unsigned int temp = (c1 - 0x21) * (0xFF - 0xA1) + (c2 - 0x21); \ | |
2707 | if (charset == charset_big5_2) \ | |
2708 | temp += BIG5_SAME_ROW * (0xC9 - 0xA1); \ | |
2709 | b1 = temp / BIG5_SAME_ROW + 0xA1; \ | |
2710 | b2 = temp % BIG5_SAME_ROW; \ | |
2711 | b2 += b2 < 0x3F ? 0x40 : 0x62; \ | |
2712 | } while (0) | |
2713 | ||
2714 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2715 | Check if a text is encoded in SJIS. If it is, return | |
2716 | CODING_CATEGORY_MASK_SJIS, else return 0. */ | |
2717 | ||
0a28aafb KH |
2718 | static int |
2719 | detect_coding_sjis (src, src_end, multibytep) | |
4ed46869 | 2720 | unsigned char *src, *src_end; |
0a28aafb | 2721 | int multibytep; |
4ed46869 | 2722 | { |
b73bfc1c KH |
2723 | int c; |
2724 | /* Dummy for ONE_MORE_BYTE. */ | |
2725 | struct coding_system dummy_coding; | |
2726 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 2727 | |
b73bfc1c | 2728 | while (1) |
4ed46869 | 2729 | { |
0a28aafb | 2730 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
682169fe KH |
2731 | if (c < 0x80) |
2732 | continue; | |
2733 | if (c == 0x80 || c == 0xA0 || c > 0xEF) | |
2734 | return 0; | |
2735 | if (c <= 0x9F || c >= 0xE0) | |
4ed46869 | 2736 | { |
682169fe KH |
2737 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
2738 | if (c < 0x40 || c == 0x7F || c > 0xFC) | |
4ed46869 KH |
2739 | return 0; |
2740 | } | |
2741 | } | |
b73bfc1c | 2742 | label_end_of_loop: |
4ed46869 KH |
2743 | return CODING_CATEGORY_MASK_SJIS; |
2744 | } | |
2745 | ||
2746 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2747 | Check if a text is encoded in BIG5. If it is, return | |
2748 | CODING_CATEGORY_MASK_BIG5, else return 0. */ | |
2749 | ||
0a28aafb KH |
2750 | static int |
2751 | detect_coding_big5 (src, src_end, multibytep) | |
4ed46869 | 2752 | unsigned char *src, *src_end; |
0a28aafb | 2753 | int multibytep; |
4ed46869 | 2754 | { |
b73bfc1c KH |
2755 | int c; |
2756 | /* Dummy for ONE_MORE_BYTE. */ | |
2757 | struct coding_system dummy_coding; | |
2758 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 2759 | |
b73bfc1c | 2760 | while (1) |
4ed46869 | 2761 | { |
0a28aafb | 2762 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
682169fe KH |
2763 | if (c < 0x80) |
2764 | continue; | |
2765 | if (c < 0xA1 || c > 0xFE) | |
2766 | return 0; | |
2767 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); | |
2768 | if (c < 0x40 || (c > 0x7F && c < 0xA1) || c > 0xFE) | |
2769 | return 0; | |
4ed46869 | 2770 | } |
b73bfc1c | 2771 | label_end_of_loop: |
4ed46869 KH |
2772 | return CODING_CATEGORY_MASK_BIG5; |
2773 | } | |
2774 | ||
fa42c37f KH |
2775 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
2776 | Check if a text is encoded in UTF-8. If it is, return | |
2777 | CODING_CATEGORY_MASK_UTF_8, else return 0. */ | |
2778 | ||
2779 | #define UTF_8_1_OCTET_P(c) ((c) < 0x80) | |
2780 | #define UTF_8_EXTRA_OCTET_P(c) (((c) & 0xC0) == 0x80) | |
2781 | #define UTF_8_2_OCTET_LEADING_P(c) (((c) & 0xE0) == 0xC0) | |
2782 | #define UTF_8_3_OCTET_LEADING_P(c) (((c) & 0xF0) == 0xE0) | |
2783 | #define UTF_8_4_OCTET_LEADING_P(c) (((c) & 0xF8) == 0xF0) | |
2784 | #define UTF_8_5_OCTET_LEADING_P(c) (((c) & 0xFC) == 0xF8) | |
2785 | #define UTF_8_6_OCTET_LEADING_P(c) (((c) & 0xFE) == 0xFC) | |
2786 | ||
0a28aafb KH |
2787 | static int |
2788 | detect_coding_utf_8 (src, src_end, multibytep) | |
fa42c37f | 2789 | unsigned char *src, *src_end; |
0a28aafb | 2790 | int multibytep; |
fa42c37f KH |
2791 | { |
2792 | unsigned char c; | |
2793 | int seq_maybe_bytes; | |
b73bfc1c KH |
2794 | /* Dummy for ONE_MORE_BYTE. */ |
2795 | struct coding_system dummy_coding; | |
2796 | struct coding_system *coding = &dummy_coding; | |
fa42c37f | 2797 | |
b73bfc1c | 2798 | while (1) |
fa42c37f | 2799 | { |
0a28aafb | 2800 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
fa42c37f KH |
2801 | if (UTF_8_1_OCTET_P (c)) |
2802 | continue; | |
2803 | else if (UTF_8_2_OCTET_LEADING_P (c)) | |
2804 | seq_maybe_bytes = 1; | |
2805 | else if (UTF_8_3_OCTET_LEADING_P (c)) | |
2806 | seq_maybe_bytes = 2; | |
2807 | else if (UTF_8_4_OCTET_LEADING_P (c)) | |
2808 | seq_maybe_bytes = 3; | |
2809 | else if (UTF_8_5_OCTET_LEADING_P (c)) | |
2810 | seq_maybe_bytes = 4; | |
2811 | else if (UTF_8_6_OCTET_LEADING_P (c)) | |
2812 | seq_maybe_bytes = 5; | |
2813 | else | |
2814 | return 0; | |
2815 | ||
2816 | do | |
2817 | { | |
0a28aafb | 2818 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
fa42c37f KH |
2819 | if (!UTF_8_EXTRA_OCTET_P (c)) |
2820 | return 0; | |
2821 | seq_maybe_bytes--; | |
2822 | } | |
2823 | while (seq_maybe_bytes > 0); | |
2824 | } | |
2825 | ||
b73bfc1c | 2826 | label_end_of_loop: |
fa42c37f KH |
2827 | return CODING_CATEGORY_MASK_UTF_8; |
2828 | } | |
2829 | ||
2830 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2831 | Check if a text is encoded in UTF-16 Big Endian (endian == 1) or | |
2832 | Little Endian (otherwise). If it is, return | |
2833 | CODING_CATEGORY_MASK_UTF_16_BE or CODING_CATEGORY_MASK_UTF_16_LE, | |
2834 | else return 0. */ | |
2835 | ||
2836 | #define UTF_16_INVALID_P(val) \ | |
2837 | (((val) == 0xFFFE) \ | |
2838 | || ((val) == 0xFFFF)) | |
2839 | ||
2840 | #define UTF_16_HIGH_SURROGATE_P(val) \ | |
2841 | (((val) & 0xD800) == 0xD800) | |
2842 | ||
2843 | #define UTF_16_LOW_SURROGATE_P(val) \ | |
2844 | (((val) & 0xDC00) == 0xDC00) | |
2845 | ||
0a28aafb KH |
2846 | static int |
2847 | detect_coding_utf_16 (src, src_end, multibytep) | |
fa42c37f | 2848 | unsigned char *src, *src_end; |
0a28aafb | 2849 | int multibytep; |
fa42c37f | 2850 | { |
b73bfc1c KH |
2851 | unsigned char c1, c2; |
2852 | /* Dummy for TWO_MORE_BYTES. */ | |
2853 | struct coding_system dummy_coding; | |
2854 | struct coding_system *coding = &dummy_coding; | |
fa42c37f | 2855 | |
0a28aafb KH |
2856 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
2857 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c2, multibytep); | |
b73bfc1c KH |
2858 | |
2859 | if ((c1 == 0xFF) && (c2 == 0xFE)) | |
fa42c37f | 2860 | return CODING_CATEGORY_MASK_UTF_16_LE; |
b73bfc1c | 2861 | else if ((c1 == 0xFE) && (c2 == 0xFF)) |
fa42c37f KH |
2862 | return CODING_CATEGORY_MASK_UTF_16_BE; |
2863 | ||
b73bfc1c | 2864 | label_end_of_loop: |
fa42c37f KH |
2865 | return 0; |
2866 | } | |
2867 | ||
4ed46869 KH |
2868 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". |
2869 | If SJIS_P is 1, decode SJIS text, else decode BIG5 test. */ | |
2870 | ||
b73bfc1c | 2871 | static void |
4ed46869 | 2872 | decode_coding_sjis_big5 (coding, source, destination, |
d46c5b12 | 2873 | src_bytes, dst_bytes, sjis_p) |
4ed46869 KH |
2874 | struct coding_system *coding; |
2875 | unsigned char *source, *destination; | |
2876 | int src_bytes, dst_bytes; | |
4ed46869 KH |
2877 | int sjis_p; |
2878 | { | |
2879 | unsigned char *src = source; | |
2880 | unsigned char *src_end = source + src_bytes; | |
2881 | unsigned char *dst = destination; | |
2882 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c KH |
2883 | /* SRC_BASE remembers the start position in source in each loop. |
2884 | The loop will be exited when there's not enough source code | |
2885 | (within macro ONE_MORE_BYTE), or when there's not enough | |
2886 | destination area to produce a character (within macro | |
2887 | EMIT_CHAR). */ | |
2888 | unsigned char *src_base; | |
2889 | Lisp_Object translation_table; | |
a5d301df | 2890 | |
b73bfc1c KH |
2891 | if (NILP (Venable_character_translation)) |
2892 | translation_table = Qnil; | |
2893 | else | |
2894 | { | |
2895 | translation_table = coding->translation_table_for_decode; | |
2896 | if (NILP (translation_table)) | |
2897 | translation_table = Vstandard_translation_table_for_decode; | |
2898 | } | |
4ed46869 | 2899 | |
d46c5b12 | 2900 | coding->produced_char = 0; |
b73bfc1c | 2901 | while (1) |
4ed46869 | 2902 | { |
b73bfc1c KH |
2903 | int c, charset, c1, c2; |
2904 | ||
2905 | src_base = src; | |
2906 | ONE_MORE_BYTE (c1); | |
2907 | ||
2908 | if (c1 < 0x80) | |
4ed46869 | 2909 | { |
b73bfc1c KH |
2910 | charset = CHARSET_ASCII; |
2911 | if (c1 < 0x20) | |
4ed46869 | 2912 | { |
b73bfc1c | 2913 | if (c1 == '\r') |
d46c5b12 | 2914 | { |
b73bfc1c | 2915 | if (coding->eol_type == CODING_EOL_CRLF) |
d46c5b12 | 2916 | { |
b73bfc1c KH |
2917 | ONE_MORE_BYTE (c2); |
2918 | if (c2 == '\n') | |
2919 | c1 = c2; | |
2920 | else if (coding->mode | |
2921 | & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
2922 | { | |
2923 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
2924 | goto label_end_of_loop; | |
2925 | } | |
2926 | else | |
2927 | /* To process C2 again, SRC is subtracted by 1. */ | |
2928 | src--; | |
d46c5b12 | 2929 | } |
b73bfc1c KH |
2930 | else if (coding->eol_type == CODING_EOL_CR) |
2931 | c1 = '\n'; | |
2932 | } | |
2933 | else if (c1 == '\n' | |
2934 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
2935 | && (coding->eol_type == CODING_EOL_CR | |
2936 | || coding->eol_type == CODING_EOL_CRLF)) | |
2937 | { | |
2938 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
2939 | goto label_end_of_loop; | |
d46c5b12 | 2940 | } |
4ed46869 | 2941 | } |
4ed46869 | 2942 | } |
54f78171 | 2943 | else |
b73bfc1c | 2944 | { |
4ed46869 KH |
2945 | if (sjis_p) |
2946 | { | |
682169fe | 2947 | if (c1 == 0x80 || c1 == 0xA0 || c1 > 0xEF) |
b73bfc1c | 2948 | goto label_invalid_code; |
682169fe | 2949 | if (c1 <= 0x9F || c1 >= 0xE0) |
fb88bf2d | 2950 | { |
54f78171 KH |
2951 | /* SJIS -> JISX0208 */ |
2952 | ONE_MORE_BYTE (c2); | |
b73bfc1c KH |
2953 | if (c2 < 0x40 || c2 == 0x7F || c2 > 0xFC) |
2954 | goto label_invalid_code; | |
2955 | DECODE_SJIS (c1, c2, c1, c2); | |
2956 | charset = charset_jisx0208; | |
5e34de15 | 2957 | } |
fb88bf2d | 2958 | else |
b73bfc1c KH |
2959 | /* SJIS -> JISX0201-Kana */ |
2960 | charset = charset_katakana_jisx0201; | |
4ed46869 | 2961 | } |
fb88bf2d | 2962 | else |
fb88bf2d | 2963 | { |
54f78171 | 2964 | /* BIG5 -> Big5 */ |
682169fe | 2965 | if (c1 < 0xA0 || c1 > 0xFE) |
b73bfc1c KH |
2966 | goto label_invalid_code; |
2967 | ONE_MORE_BYTE (c2); | |
2968 | if (c2 < 0x40 || (c2 > 0x7E && c2 < 0xA1) || c2 > 0xFE) | |
2969 | goto label_invalid_code; | |
2970 | DECODE_BIG5 (c1, c2, charset, c1, c2); | |
4ed46869 KH |
2971 | } |
2972 | } | |
4ed46869 | 2973 | |
b73bfc1c KH |
2974 | c = DECODE_ISO_CHARACTER (charset, c1, c2); |
2975 | EMIT_CHAR (c); | |
fb88bf2d KH |
2976 | continue; |
2977 | ||
b73bfc1c KH |
2978 | label_invalid_code: |
2979 | coding->errors++; | |
4ed46869 | 2980 | src = src_base; |
b73bfc1c KH |
2981 | c = *src++; |
2982 | EMIT_CHAR (c); | |
fb88bf2d | 2983 | } |
d46c5b12 | 2984 | |
b73bfc1c KH |
2985 | label_end_of_loop: |
2986 | coding->consumed = coding->consumed_char = src_base - source; | |
d46c5b12 | 2987 | coding->produced = dst - destination; |
b73bfc1c | 2988 | return; |
4ed46869 KH |
2989 | } |
2990 | ||
2991 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". | |
b73bfc1c KH |
2992 | This function can encode charsets `ascii', `katakana-jisx0201', |
2993 | `japanese-jisx0208', `chinese-big5-1', and `chinese-big5-2'. We | |
2994 | are sure that all these charsets are registered as official charset | |
4ed46869 KH |
2995 | (i.e. do not have extended leading-codes). Characters of other |
2996 | charsets are produced without any encoding. If SJIS_P is 1, encode | |
2997 | SJIS text, else encode BIG5 text. */ | |
2998 | ||
b73bfc1c | 2999 | static void |
4ed46869 | 3000 | encode_coding_sjis_big5 (coding, source, destination, |
d46c5b12 | 3001 | src_bytes, dst_bytes, sjis_p) |
4ed46869 KH |
3002 | struct coding_system *coding; |
3003 | unsigned char *source, *destination; | |
3004 | int src_bytes, dst_bytes; | |
4ed46869 KH |
3005 | int sjis_p; |
3006 | { | |
3007 | unsigned char *src = source; | |
3008 | unsigned char *src_end = source + src_bytes; | |
3009 | unsigned char *dst = destination; | |
3010 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c KH |
3011 | /* SRC_BASE remembers the start position in source in each loop. |
3012 | The loop will be exited when there's not enough source text to | |
3013 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
3014 | there's not enough destination area to produce encoded codes | |
3015 | (within macro EMIT_BYTES). */ | |
3016 | unsigned char *src_base; | |
3017 | Lisp_Object translation_table; | |
4ed46869 | 3018 | |
b73bfc1c KH |
3019 | if (NILP (Venable_character_translation)) |
3020 | translation_table = Qnil; | |
3021 | else | |
4ed46869 | 3022 | { |
39658efc | 3023 | translation_table = coding->translation_table_for_encode; |
b73bfc1c | 3024 | if (NILP (translation_table)) |
39658efc | 3025 | translation_table = Vstandard_translation_table_for_encode; |
b73bfc1c | 3026 | } |
a5d301df | 3027 | |
b73bfc1c KH |
3028 | while (1) |
3029 | { | |
3030 | int c, charset, c1, c2; | |
4ed46869 | 3031 | |
b73bfc1c KH |
3032 | src_base = src; |
3033 | ONE_MORE_CHAR (c); | |
3034 | ||
3035 | /* Now encode the character C. */ | |
3036 | if (SINGLE_BYTE_CHAR_P (c)) | |
3037 | { | |
3038 | switch (c) | |
4ed46869 | 3039 | { |
b73bfc1c KH |
3040 | case '\r': |
3041 | if (!coding->mode & CODING_MODE_SELECTIVE_DISPLAY) | |
3042 | { | |
3043 | EMIT_ONE_BYTE (c); | |
3044 | break; | |
3045 | } | |
3046 | c = '\n'; | |
3047 | case '\n': | |
3048 | if (coding->eol_type == CODING_EOL_CRLF) | |
3049 | { | |
3050 | EMIT_TWO_BYTES ('\r', c); | |
3051 | break; | |
3052 | } | |
3053 | else if (coding->eol_type == CODING_EOL_CR) | |
3054 | c = '\r'; | |
3055 | default: | |
3056 | EMIT_ONE_BYTE (c); | |
3057 | } | |
3058 | } | |
3059 | else | |
3060 | { | |
3061 | SPLIT_CHAR (c, charset, c1, c2); | |
3062 | if (sjis_p) | |
3063 | { | |
3064 | if (charset == charset_jisx0208 | |
3065 | || charset == charset_jisx0208_1978) | |
3066 | { | |
3067 | ENCODE_SJIS (c1, c2, c1, c2); | |
3068 | EMIT_TWO_BYTES (c1, c2); | |
3069 | } | |
39658efc KH |
3070 | else if (charset == charset_katakana_jisx0201) |
3071 | EMIT_ONE_BYTE (c1 | 0x80); | |
fc53a214 KH |
3072 | else if (charset == charset_latin_jisx0201) |
3073 | EMIT_ONE_BYTE (c1); | |
b73bfc1c KH |
3074 | else |
3075 | /* There's no way other than producing the internal | |
3076 | codes as is. */ | |
3077 | EMIT_BYTES (src_base, src); | |
4ed46869 | 3078 | } |
4ed46869 | 3079 | else |
b73bfc1c KH |
3080 | { |
3081 | if (charset == charset_big5_1 || charset == charset_big5_2) | |
3082 | { | |
3083 | ENCODE_BIG5 (charset, c1, c2, c1, c2); | |
3084 | EMIT_TWO_BYTES (c1, c2); | |
3085 | } | |
3086 | else | |
3087 | /* There's no way other than producing the internal | |
3088 | codes as is. */ | |
3089 | EMIT_BYTES (src_base, src); | |
3090 | } | |
4ed46869 | 3091 | } |
b73bfc1c | 3092 | coding->consumed_char++; |
4ed46869 KH |
3093 | } |
3094 | ||
b73bfc1c KH |
3095 | label_end_of_loop: |
3096 | coding->consumed = src_base - source; | |
d46c5b12 | 3097 | coding->produced = coding->produced_char = dst - destination; |
4ed46869 KH |
3098 | } |
3099 | ||
3100 | \f | |
1397dc18 KH |
3101 | /*** 5. CCL handlers ***/ |
3102 | ||
3103 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3104 | Check if a text is encoded in a coding system of which | |
3105 | encoder/decoder are written in CCL program. If it is, return | |
3106 | CODING_CATEGORY_MASK_CCL, else return 0. */ | |
3107 | ||
0a28aafb KH |
3108 | static int |
3109 | detect_coding_ccl (src, src_end, multibytep) | |
1397dc18 | 3110 | unsigned char *src, *src_end; |
0a28aafb | 3111 | int multibytep; |
1397dc18 KH |
3112 | { |
3113 | unsigned char *valid; | |
b73bfc1c KH |
3114 | int c; |
3115 | /* Dummy for ONE_MORE_BYTE. */ | |
3116 | struct coding_system dummy_coding; | |
3117 | struct coding_system *coding = &dummy_coding; | |
1397dc18 KH |
3118 | |
3119 | /* No coding system is assigned to coding-category-ccl. */ | |
3120 | if (!coding_system_table[CODING_CATEGORY_IDX_CCL]) | |
3121 | return 0; | |
3122 | ||
3123 | valid = coding_system_table[CODING_CATEGORY_IDX_CCL]->spec.ccl.valid_codes; | |
b73bfc1c | 3124 | while (1) |
1397dc18 | 3125 | { |
0a28aafb | 3126 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
b73bfc1c KH |
3127 | if (! valid[c]) |
3128 | return 0; | |
1397dc18 | 3129 | } |
b73bfc1c | 3130 | label_end_of_loop: |
1397dc18 KH |
3131 | return CODING_CATEGORY_MASK_CCL; |
3132 | } | |
3133 | ||
3134 | \f | |
3135 | /*** 6. End-of-line handlers ***/ | |
4ed46869 | 3136 | |
b73bfc1c | 3137 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
4ed46869 | 3138 | |
b73bfc1c | 3139 | static void |
d46c5b12 | 3140 | decode_eol (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
3141 | struct coding_system *coding; |
3142 | unsigned char *source, *destination; | |
3143 | int src_bytes, dst_bytes; | |
4ed46869 KH |
3144 | { |
3145 | unsigned char *src = source; | |
4ed46869 | 3146 | unsigned char *dst = destination; |
b73bfc1c KH |
3147 | unsigned char *src_end = src + src_bytes; |
3148 | unsigned char *dst_end = dst + dst_bytes; | |
3149 | Lisp_Object translation_table; | |
3150 | /* SRC_BASE remembers the start position in source in each loop. | |
3151 | The loop will be exited when there's not enough source code | |
3152 | (within macro ONE_MORE_BYTE), or when there's not enough | |
3153 | destination area to produce a character (within macro | |
3154 | EMIT_CHAR). */ | |
3155 | unsigned char *src_base; | |
3156 | int c; | |
3157 | ||
3158 | translation_table = Qnil; | |
4ed46869 KH |
3159 | switch (coding->eol_type) |
3160 | { | |
3161 | case CODING_EOL_CRLF: | |
b73bfc1c | 3162 | while (1) |
d46c5b12 | 3163 | { |
b73bfc1c KH |
3164 | src_base = src; |
3165 | ONE_MORE_BYTE (c); | |
3166 | if (c == '\r') | |
fb88bf2d | 3167 | { |
b73bfc1c KH |
3168 | ONE_MORE_BYTE (c); |
3169 | if (c != '\n') | |
3170 | { | |
3171 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
3172 | { | |
3173 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
3174 | goto label_end_of_loop; | |
3175 | } | |
3176 | src--; | |
3177 | c = '\r'; | |
3178 | } | |
fb88bf2d | 3179 | } |
b73bfc1c KH |
3180 | else if (c == '\n' |
3181 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL)) | |
d46c5b12 | 3182 | { |
b73bfc1c KH |
3183 | coding->result = CODING_FINISH_INCONSISTENT_EOL; |
3184 | goto label_end_of_loop; | |
d46c5b12 | 3185 | } |
b73bfc1c | 3186 | EMIT_CHAR (c); |
d46c5b12 | 3187 | } |
b73bfc1c KH |
3188 | break; |
3189 | ||
3190 | case CODING_EOL_CR: | |
3191 | while (1) | |
d46c5b12 | 3192 | { |
b73bfc1c KH |
3193 | src_base = src; |
3194 | ONE_MORE_BYTE (c); | |
3195 | if (c == '\n') | |
3196 | { | |
3197 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
3198 | { | |
3199 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
3200 | goto label_end_of_loop; | |
3201 | } | |
3202 | } | |
3203 | else if (c == '\r') | |
3204 | c = '\n'; | |
3205 | EMIT_CHAR (c); | |
d46c5b12 | 3206 | } |
4ed46869 KH |
3207 | break; |
3208 | ||
b73bfc1c KH |
3209 | default: /* no need for EOL handling */ |
3210 | while (1) | |
d46c5b12 | 3211 | { |
b73bfc1c KH |
3212 | src_base = src; |
3213 | ONE_MORE_BYTE (c); | |
3214 | EMIT_CHAR (c); | |
d46c5b12 | 3215 | } |
4ed46869 KH |
3216 | } |
3217 | ||
b73bfc1c KH |
3218 | label_end_of_loop: |
3219 | coding->consumed = coding->consumed_char = src_base - source; | |
3220 | coding->produced = dst - destination; | |
3221 | return; | |
4ed46869 KH |
3222 | } |
3223 | ||
3224 | /* See "GENERAL NOTES about `encode_coding_XXX ()' functions". Encode | |
b73bfc1c | 3225 | format of end-of-line according to `coding->eol_type'. It also |
8ca3766a | 3226 | convert multibyte form 8-bit characters to unibyte if |
b73bfc1c KH |
3227 | CODING->src_multibyte is nonzero. If `coding->mode & |
3228 | CODING_MODE_SELECTIVE_DISPLAY' is nonzero, code '\r' in source text | |
3229 | also means end-of-line. */ | |
4ed46869 | 3230 | |
b73bfc1c | 3231 | static void |
d46c5b12 | 3232 | encode_eol (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
3233 | struct coding_system *coding; |
3234 | unsigned char *source, *destination; | |
3235 | int src_bytes, dst_bytes; | |
4ed46869 KH |
3236 | { |
3237 | unsigned char *src = source; | |
3238 | unsigned char *dst = destination; | |
b73bfc1c KH |
3239 | unsigned char *src_end = src + src_bytes; |
3240 | unsigned char *dst_end = dst + dst_bytes; | |
3241 | Lisp_Object translation_table; | |
3242 | /* SRC_BASE remembers the start position in source in each loop. | |
3243 | The loop will be exited when there's not enough source text to | |
3244 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
3245 | there's not enough destination area to produce encoded codes | |
3246 | (within macro EMIT_BYTES). */ | |
3247 | unsigned char *src_base; | |
3248 | int c; | |
3249 | int selective_display = coding->mode & CODING_MODE_SELECTIVE_DISPLAY; | |
3250 | ||
3251 | translation_table = Qnil; | |
3252 | if (coding->src_multibyte | |
3253 | && *(src_end - 1) == LEADING_CODE_8_BIT_CONTROL) | |
3254 | { | |
3255 | src_end--; | |
3256 | src_bytes--; | |
3257 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; | |
3258 | } | |
fb88bf2d | 3259 | |
d46c5b12 KH |
3260 | if (coding->eol_type == CODING_EOL_CRLF) |
3261 | { | |
b73bfc1c | 3262 | while (src < src_end) |
d46c5b12 | 3263 | { |
b73bfc1c | 3264 | src_base = src; |
d46c5b12 | 3265 | c = *src++; |
b73bfc1c KH |
3266 | if (c >= 0x20) |
3267 | EMIT_ONE_BYTE (c); | |
3268 | else if (c == '\n' || (c == '\r' && selective_display)) | |
3269 | EMIT_TWO_BYTES ('\r', '\n'); | |
d46c5b12 | 3270 | else |
b73bfc1c | 3271 | EMIT_ONE_BYTE (c); |
d46c5b12 | 3272 | } |
ff2b1ea9 | 3273 | src_base = src; |
b73bfc1c | 3274 | label_end_of_loop: |
005f0d35 | 3275 | ; |
d46c5b12 KH |
3276 | } |
3277 | else | |
4ed46869 | 3278 | { |
78a629d2 | 3279 | if (!dst_bytes || src_bytes <= dst_bytes) |
4ed46869 | 3280 | { |
b73bfc1c KH |
3281 | safe_bcopy (src, dst, src_bytes); |
3282 | src_base = src_end; | |
3283 | dst += src_bytes; | |
d46c5b12 | 3284 | } |
d46c5b12 | 3285 | else |
b73bfc1c KH |
3286 | { |
3287 | if (coding->src_multibyte | |
3288 | && *(src + dst_bytes - 1) == LEADING_CODE_8_BIT_CONTROL) | |
3289 | dst_bytes--; | |
3290 | safe_bcopy (src, dst, dst_bytes); | |
3291 | src_base = src + dst_bytes; | |
3292 | dst = destination + dst_bytes; | |
3293 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
3294 | } | |
993824c9 | 3295 | if (coding->eol_type == CODING_EOL_CR) |
d46c5b12 | 3296 | { |
b73bfc1c KH |
3297 | for (src = destination; src < dst; src++) |
3298 | if (*src == '\n') *src = '\r'; | |
d46c5b12 | 3299 | } |
b73bfc1c | 3300 | else if (selective_display) |
d46c5b12 | 3301 | { |
b73bfc1c KH |
3302 | for (src = destination; src < dst; src++) |
3303 | if (*src == '\r') *src = '\n'; | |
4ed46869 | 3304 | } |
4ed46869 | 3305 | } |
b73bfc1c KH |
3306 | if (coding->src_multibyte) |
3307 | dst = destination + str_as_unibyte (destination, dst - destination); | |
4ed46869 | 3308 | |
b73bfc1c KH |
3309 | coding->consumed = src_base - source; |
3310 | coding->produced = dst - destination; | |
78a629d2 | 3311 | coding->produced_char = coding->produced; |
4ed46869 KH |
3312 | } |
3313 | ||
3314 | \f | |
1397dc18 | 3315 | /*** 7. C library functions ***/ |
4ed46869 | 3316 | |
cfb43547 | 3317 | /* In Emacs Lisp, a coding system is represented by a Lisp symbol which |
4ed46869 | 3318 | has a property `coding-system'. The value of this property is a |
cfb43547 | 3319 | vector of length 5 (called the coding-vector). Among elements of |
4ed46869 KH |
3320 | this vector, the first (element[0]) and the fifth (element[4]) |
3321 | carry important information for decoding/encoding. Before | |
3322 | decoding/encoding, this information should be set in fields of a | |
3323 | structure of type `coding_system'. | |
3324 | ||
cfb43547 | 3325 | The value of the property `coding-system' can be a symbol of another |
4ed46869 KH |
3326 | subsidiary coding-system. In that case, Emacs gets coding-vector |
3327 | from that symbol. | |
3328 | ||
3329 | `element[0]' contains information to be set in `coding->type'. The | |
3330 | value and its meaning is as follows: | |
3331 | ||
0ef69138 KH |
3332 | 0 -- coding_type_emacs_mule |
3333 | 1 -- coding_type_sjis | |
3334 | 2 -- coding_type_iso2022 | |
3335 | 3 -- coding_type_big5 | |
3336 | 4 -- coding_type_ccl encoder/decoder written in CCL | |
3337 | nil -- coding_type_no_conversion | |
3338 | t -- coding_type_undecided (automatic conversion on decoding, | |
3339 | no-conversion on encoding) | |
4ed46869 KH |
3340 | |
3341 | `element[4]' contains information to be set in `coding->flags' and | |
3342 | `coding->spec'. The meaning varies by `coding->type'. | |
3343 | ||
3344 | If `coding->type' is `coding_type_iso2022', element[4] is a vector | |
3345 | of length 32 (of which the first 13 sub-elements are used now). | |
3346 | Meanings of these sub-elements are: | |
3347 | ||
3348 | sub-element[N] where N is 0 through 3: to be set in `coding->spec.iso2022' | |
3349 | If the value is an integer of valid charset, the charset is | |
3350 | assumed to be designated to graphic register N initially. | |
3351 | ||
3352 | If the value is minus, it is a minus value of charset which | |
3353 | reserves graphic register N, which means that the charset is | |
3354 | not designated initially but should be designated to graphic | |
3355 | register N just before encoding a character in that charset. | |
3356 | ||
3357 | If the value is nil, graphic register N is never used on | |
3358 | encoding. | |
3359 | ||
3360 | sub-element[N] where N is 4 through 11: to be set in `coding->flags' | |
3361 | Each value takes t or nil. See the section ISO2022 of | |
3362 | `coding.h' for more information. | |
3363 | ||
3364 | If `coding->type' is `coding_type_big5', element[4] is t to denote | |
3365 | BIG5-ETen or nil to denote BIG5-HKU. | |
3366 | ||
3367 | If `coding->type' takes the other value, element[4] is ignored. | |
3368 | ||
cfb43547 | 3369 | Emacs Lisp's coding systems also carry information about format of |
4ed46869 KH |
3370 | end-of-line in a value of property `eol-type'. If the value is |
3371 | integer, 0 means CODING_EOL_LF, 1 means CODING_EOL_CRLF, and 2 | |
3372 | means CODING_EOL_CR. If it is not integer, it should be a vector | |
3373 | of subsidiary coding systems of which property `eol-type' has one | |
cfb43547 | 3374 | of the above values. |
4ed46869 KH |
3375 | |
3376 | */ | |
3377 | ||
3378 | /* Extract information for decoding/encoding from CODING_SYSTEM_SYMBOL | |
3379 | and set it in CODING. If CODING_SYSTEM_SYMBOL is invalid, CODING | |
3380 | is setup so that no conversion is necessary and return -1, else | |
3381 | return 0. */ | |
3382 | ||
3383 | int | |
e0e989f6 KH |
3384 | setup_coding_system (coding_system, coding) |
3385 | Lisp_Object coding_system; | |
4ed46869 KH |
3386 | struct coding_system *coding; |
3387 | { | |
d46c5b12 | 3388 | Lisp_Object coding_spec, coding_type, eol_type, plist; |
4608c386 | 3389 | Lisp_Object val; |
4ed46869 | 3390 | |
c07c8e12 KH |
3391 | /* At first, zero clear all members. */ |
3392 | bzero (coding, sizeof (struct coding_system)); | |
3393 | ||
d46c5b12 | 3394 | /* Initialize some fields required for all kinds of coding systems. */ |
774324d6 | 3395 | coding->symbol = coding_system; |
d46c5b12 KH |
3396 | coding->heading_ascii = -1; |
3397 | coding->post_read_conversion = coding->pre_write_conversion = Qnil; | |
ec6d2bb8 KH |
3398 | coding->composing = COMPOSITION_DISABLED; |
3399 | coding->cmp_data = NULL; | |
1f5dbf34 KH |
3400 | |
3401 | if (NILP (coding_system)) | |
3402 | goto label_invalid_coding_system; | |
3403 | ||
4608c386 | 3404 | coding_spec = Fget (coding_system, Qcoding_system); |
1f5dbf34 | 3405 | |
4608c386 KH |
3406 | if (!VECTORP (coding_spec) |
3407 | || XVECTOR (coding_spec)->size != 5 | |
3408 | || !CONSP (XVECTOR (coding_spec)->contents[3])) | |
4ed46869 | 3409 | goto label_invalid_coding_system; |
4608c386 | 3410 | |
d46c5b12 KH |
3411 | eol_type = inhibit_eol_conversion ? Qnil : Fget (coding_system, Qeol_type); |
3412 | if (VECTORP (eol_type)) | |
3413 | { | |
3414 | coding->eol_type = CODING_EOL_UNDECIDED; | |
3415 | coding->common_flags = CODING_REQUIRE_DETECTION_MASK; | |
3416 | } | |
3417 | else if (XFASTINT (eol_type) == 1) | |
3418 | { | |
3419 | coding->eol_type = CODING_EOL_CRLF; | |
3420 | coding->common_flags | |
3421 | = CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
3422 | } | |
3423 | else if (XFASTINT (eol_type) == 2) | |
3424 | { | |
3425 | coding->eol_type = CODING_EOL_CR; | |
3426 | coding->common_flags | |
3427 | = CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
3428 | } | |
3429 | else | |
3430 | coding->eol_type = CODING_EOL_LF; | |
3431 | ||
3432 | coding_type = XVECTOR (coding_spec)->contents[0]; | |
3433 | /* Try short cut. */ | |
3434 | if (SYMBOLP (coding_type)) | |
3435 | { | |
3436 | if (EQ (coding_type, Qt)) | |
3437 | { | |
3438 | coding->type = coding_type_undecided; | |
3439 | coding->common_flags |= CODING_REQUIRE_DETECTION_MASK; | |
3440 | } | |
3441 | else | |
3442 | coding->type = coding_type_no_conversion; | |
9b96232f KH |
3443 | /* Initialize this member. Any thing other than |
3444 | CODING_CATEGORY_IDX_UTF_16_BE and | |
3445 | CODING_CATEGORY_IDX_UTF_16_LE are ok because they have | |
3446 | special treatment in detect_eol. */ | |
3447 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
3448 | ||
d46c5b12 KH |
3449 | return 0; |
3450 | } | |
3451 | ||
d46c5b12 KH |
3452 | /* Get values of coding system properties: |
3453 | `post-read-conversion', `pre-write-conversion', | |
f967223b | 3454 | `translation-table-for-decode', `translation-table-for-encode'. */ |
4608c386 | 3455 | plist = XVECTOR (coding_spec)->contents[3]; |
b843d1ae | 3456 | /* Pre & post conversion functions should be disabled if |
8ca3766a | 3457 | inhibit_eol_conversion is nonzero. This is the case that a code |
b843d1ae KH |
3458 | conversion function is called while those functions are running. */ |
3459 | if (! inhibit_pre_post_conversion) | |
3460 | { | |
3461 | coding->post_read_conversion = Fplist_get (plist, Qpost_read_conversion); | |
3462 | coding->pre_write_conversion = Fplist_get (plist, Qpre_write_conversion); | |
3463 | } | |
f967223b | 3464 | val = Fplist_get (plist, Qtranslation_table_for_decode); |
4608c386 | 3465 | if (SYMBOLP (val)) |
f967223b KH |
3466 | val = Fget (val, Qtranslation_table_for_decode); |
3467 | coding->translation_table_for_decode = CHAR_TABLE_P (val) ? val : Qnil; | |
3468 | val = Fplist_get (plist, Qtranslation_table_for_encode); | |
4608c386 | 3469 | if (SYMBOLP (val)) |
f967223b KH |
3470 | val = Fget (val, Qtranslation_table_for_encode); |
3471 | coding->translation_table_for_encode = CHAR_TABLE_P (val) ? val : Qnil; | |
d46c5b12 KH |
3472 | val = Fplist_get (plist, Qcoding_category); |
3473 | if (!NILP (val)) | |
3474 | { | |
3475 | val = Fget (val, Qcoding_category_index); | |
3476 | if (INTEGERP (val)) | |
3477 | coding->category_idx = XINT (val); | |
3478 | else | |
3479 | goto label_invalid_coding_system; | |
3480 | } | |
3481 | else | |
3482 | goto label_invalid_coding_system; | |
4608c386 | 3483 | |
ec6d2bb8 KH |
3484 | /* If the coding system has non-nil `composition' property, enable |
3485 | composition handling. */ | |
3486 | val = Fplist_get (plist, Qcomposition); | |
3487 | if (!NILP (val)) | |
3488 | coding->composing = COMPOSITION_NO; | |
3489 | ||
d46c5b12 | 3490 | switch (XFASTINT (coding_type)) |
4ed46869 KH |
3491 | { |
3492 | case 0: | |
0ef69138 | 3493 | coding->type = coding_type_emacs_mule; |
aa72b389 KH |
3494 | coding->common_flags |
3495 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
3496 | coding->composing = COMPOSITION_NO; | |
c952af22 KH |
3497 | if (!NILP (coding->post_read_conversion)) |
3498 | coding->common_flags |= CODING_REQUIRE_DECODING_MASK; | |
3499 | if (!NILP (coding->pre_write_conversion)) | |
3500 | coding->common_flags |= CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 KH |
3501 | break; |
3502 | ||
3503 | case 1: | |
3504 | coding->type = coding_type_sjis; | |
c952af22 KH |
3505 | coding->common_flags |
3506 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 KH |
3507 | break; |
3508 | ||
3509 | case 2: | |
3510 | coding->type = coding_type_iso2022; | |
c952af22 KH |
3511 | coding->common_flags |
3512 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3513 | { |
70c22245 | 3514 | Lisp_Object val, temp; |
4ed46869 | 3515 | Lisp_Object *flags; |
d46c5b12 | 3516 | int i, charset, reg_bits = 0; |
4ed46869 | 3517 | |
4608c386 | 3518 | val = XVECTOR (coding_spec)->contents[4]; |
f44d27ce | 3519 | |
4ed46869 KH |
3520 | if (!VECTORP (val) || XVECTOR (val)->size != 32) |
3521 | goto label_invalid_coding_system; | |
3522 | ||
3523 | flags = XVECTOR (val)->contents; | |
3524 | coding->flags | |
3525 | = ((NILP (flags[4]) ? 0 : CODING_FLAG_ISO_SHORT_FORM) | |
3526 | | (NILP (flags[5]) ? 0 : CODING_FLAG_ISO_RESET_AT_EOL) | |
3527 | | (NILP (flags[6]) ? 0 : CODING_FLAG_ISO_RESET_AT_CNTL) | |
3528 | | (NILP (flags[7]) ? 0 : CODING_FLAG_ISO_SEVEN_BITS) | |
3529 | | (NILP (flags[8]) ? 0 : CODING_FLAG_ISO_LOCKING_SHIFT) | |
3530 | | (NILP (flags[9]) ? 0 : CODING_FLAG_ISO_SINGLE_SHIFT) | |
3531 | | (NILP (flags[10]) ? 0 : CODING_FLAG_ISO_USE_ROMAN) | |
3532 | | (NILP (flags[11]) ? 0 : CODING_FLAG_ISO_USE_OLDJIS) | |
e0e989f6 KH |
3533 | | (NILP (flags[12]) ? 0 : CODING_FLAG_ISO_NO_DIRECTION) |
3534 | | (NILP (flags[13]) ? 0 : CODING_FLAG_ISO_INIT_AT_BOL) | |
c4825358 KH |
3535 | | (NILP (flags[14]) ? 0 : CODING_FLAG_ISO_DESIGNATE_AT_BOL) |
3536 | | (NILP (flags[15]) ? 0 : CODING_FLAG_ISO_SAFE) | |
3f003981 | 3537 | | (NILP (flags[16]) ? 0 : CODING_FLAG_ISO_LATIN_EXTRA) |
c4825358 | 3538 | ); |
4ed46869 KH |
3539 | |
3540 | /* Invoke graphic register 0 to plane 0. */ | |
3541 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; | |
3542 | /* Invoke graphic register 1 to plane 1 if we can use full 8-bit. */ | |
3543 | CODING_SPEC_ISO_INVOCATION (coding, 1) | |
3544 | = (coding->flags & CODING_FLAG_ISO_SEVEN_BITS ? -1 : 1); | |
3545 | /* Not single shifting at first. */ | |
6e85d753 | 3546 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; |
e0e989f6 | 3547 | /* Beginning of buffer should also be regarded as bol. */ |
6e85d753 | 3548 | CODING_SPEC_ISO_BOL (coding) = 1; |
4ed46869 | 3549 | |
70c22245 KH |
3550 | for (charset = 0; charset <= MAX_CHARSET; charset++) |
3551 | CODING_SPEC_ISO_REVISION_NUMBER (coding, charset) = 255; | |
3552 | val = Vcharset_revision_alist; | |
3553 | while (CONSP (val)) | |
3554 | { | |
03699b14 | 3555 | charset = get_charset_id (Fcar_safe (XCAR (val))); |
70c22245 | 3556 | if (charset >= 0 |
03699b14 | 3557 | && (temp = Fcdr_safe (XCAR (val)), INTEGERP (temp)) |
70c22245 KH |
3558 | && (i = XINT (temp), (i >= 0 && (i + '@') < 128))) |
3559 | CODING_SPEC_ISO_REVISION_NUMBER (coding, charset) = i; | |
03699b14 | 3560 | val = XCDR (val); |
70c22245 KH |
3561 | } |
3562 | ||
4ed46869 KH |
3563 | /* Checks FLAGS[REG] (REG = 0, 1, 2 3) and decide designations. |
3564 | FLAGS[REG] can be one of below: | |
3565 | integer CHARSET: CHARSET occupies register I, | |
3566 | t: designate nothing to REG initially, but can be used | |
3567 | by any charsets, | |
3568 | list of integer, nil, or t: designate the first | |
3569 | element (if integer) to REG initially, the remaining | |
3570 | elements (if integer) is designated to REG on request, | |
d46c5b12 | 3571 | if an element is t, REG can be used by any charsets, |
4ed46869 | 3572 | nil: REG is never used. */ |
467e7675 | 3573 | for (charset = 0; charset <= MAX_CHARSET; charset++) |
1ba9e4ab KH |
3574 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3575 | = CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION; | |
4ed46869 KH |
3576 | for (i = 0; i < 4; i++) |
3577 | { | |
3578 | if (INTEGERP (flags[i]) | |
e0e989f6 KH |
3579 | && (charset = XINT (flags[i]), CHARSET_VALID_P (charset)) |
3580 | || (charset = get_charset_id (flags[i])) >= 0) | |
4ed46869 KH |
3581 | { |
3582 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = charset; | |
3583 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) = i; | |
3584 | } | |
3585 | else if (EQ (flags[i], Qt)) | |
3586 | { | |
3587 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
d46c5b12 KH |
3588 | reg_bits |= 1 << i; |
3589 | coding->flags |= CODING_FLAG_ISO_DESIGNATION; | |
4ed46869 KH |
3590 | } |
3591 | else if (CONSP (flags[i])) | |
3592 | { | |
84d60297 RS |
3593 | Lisp_Object tail; |
3594 | tail = flags[i]; | |
4ed46869 | 3595 | |
d46c5b12 | 3596 | coding->flags |= CODING_FLAG_ISO_DESIGNATION; |
03699b14 KR |
3597 | if (INTEGERP (XCAR (tail)) |
3598 | && (charset = XINT (XCAR (tail)), | |
e0e989f6 | 3599 | CHARSET_VALID_P (charset)) |
03699b14 | 3600 | || (charset = get_charset_id (XCAR (tail))) >= 0) |
4ed46869 KH |
3601 | { |
3602 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = charset; | |
3603 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) =i; | |
3604 | } | |
3605 | else | |
3606 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
03699b14 | 3607 | tail = XCDR (tail); |
4ed46869 KH |
3608 | while (CONSP (tail)) |
3609 | { | |
03699b14 KR |
3610 | if (INTEGERP (XCAR (tail)) |
3611 | && (charset = XINT (XCAR (tail)), | |
e0e989f6 | 3612 | CHARSET_VALID_P (charset)) |
03699b14 | 3613 | || (charset = get_charset_id (XCAR (tail))) >= 0) |
70c22245 KH |
3614 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3615 | = i; | |
03699b14 | 3616 | else if (EQ (XCAR (tail), Qt)) |
d46c5b12 | 3617 | reg_bits |= 1 << i; |
03699b14 | 3618 | tail = XCDR (tail); |
4ed46869 KH |
3619 | } |
3620 | } | |
3621 | else | |
3622 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
3623 | ||
3624 | CODING_SPEC_ISO_DESIGNATION (coding, i) | |
3625 | = CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i); | |
3626 | } | |
3627 | ||
d46c5b12 | 3628 | if (reg_bits && ! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)) |
4ed46869 KH |
3629 | { |
3630 | /* REG 1 can be used only by locking shift in 7-bit env. */ | |
3631 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) | |
d46c5b12 | 3632 | reg_bits &= ~2; |
4ed46869 KH |
3633 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
3634 | /* Without any shifting, only REG 0 and 1 can be used. */ | |
d46c5b12 | 3635 | reg_bits &= 3; |
4ed46869 KH |
3636 | } |
3637 | ||
d46c5b12 KH |
3638 | if (reg_bits) |
3639 | for (charset = 0; charset <= MAX_CHARSET; charset++) | |
6e85d753 | 3640 | { |
96148065 KH |
3641 | if (CHARSET_VALID_P (charset) |
3642 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) | |
3643 | == CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION)) | |
d46c5b12 KH |
3644 | { |
3645 | /* There exist some default graphic registers to be | |
96148065 | 3646 | used by CHARSET. */ |
d46c5b12 KH |
3647 | |
3648 | /* We had better avoid designating a charset of | |
3649 | CHARS96 to REG 0 as far as possible. */ | |
3650 | if (CHARSET_CHARS (charset) == 96) | |
3651 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) | |
3652 | = (reg_bits & 2 | |
3653 | ? 1 : (reg_bits & 4 ? 2 : (reg_bits & 8 ? 3 : 0))); | |
3654 | else | |
3655 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) | |
3656 | = (reg_bits & 1 | |
3657 | ? 0 : (reg_bits & 2 ? 1 : (reg_bits & 4 ? 2 : 3))); | |
3658 | } | |
6e85d753 | 3659 | } |
4ed46869 | 3660 | } |
c952af22 | 3661 | coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK; |
d46c5b12 | 3662 | coding->spec.iso2022.last_invalid_designation_register = -1; |
4ed46869 KH |
3663 | break; |
3664 | ||
3665 | case 3: | |
3666 | coding->type = coding_type_big5; | |
c952af22 KH |
3667 | coding->common_flags |
3668 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3669 | coding->flags |
4608c386 | 3670 | = (NILP (XVECTOR (coding_spec)->contents[4]) |
4ed46869 KH |
3671 | ? CODING_FLAG_BIG5_HKU |
3672 | : CODING_FLAG_BIG5_ETEN); | |
3673 | break; | |
3674 | ||
3675 | case 4: | |
3676 | coding->type = coding_type_ccl; | |
c952af22 KH |
3677 | coding->common_flags |
3678 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3679 | { |
84d60297 | 3680 | val = XVECTOR (coding_spec)->contents[4]; |
ef4ced28 KH |
3681 | if (! CONSP (val) |
3682 | || setup_ccl_program (&(coding->spec.ccl.decoder), | |
03699b14 | 3683 | XCAR (val)) < 0 |
ef4ced28 | 3684 | || setup_ccl_program (&(coding->spec.ccl.encoder), |
03699b14 | 3685 | XCDR (val)) < 0) |
4ed46869 | 3686 | goto label_invalid_coding_system; |
1397dc18 KH |
3687 | |
3688 | bzero (coding->spec.ccl.valid_codes, 256); | |
3689 | val = Fplist_get (plist, Qvalid_codes); | |
3690 | if (CONSP (val)) | |
3691 | { | |
3692 | Lisp_Object this; | |
3693 | ||
03699b14 | 3694 | for (; CONSP (val); val = XCDR (val)) |
1397dc18 | 3695 | { |
03699b14 | 3696 | this = XCAR (val); |
1397dc18 KH |
3697 | if (INTEGERP (this) |
3698 | && XINT (this) >= 0 && XINT (this) < 256) | |
3699 | coding->spec.ccl.valid_codes[XINT (this)] = 1; | |
3700 | else if (CONSP (this) | |
03699b14 KR |
3701 | && INTEGERP (XCAR (this)) |
3702 | && INTEGERP (XCDR (this))) | |
1397dc18 | 3703 | { |
03699b14 KR |
3704 | int start = XINT (XCAR (this)); |
3705 | int end = XINT (XCDR (this)); | |
1397dc18 KH |
3706 | |
3707 | if (start >= 0 && start <= end && end < 256) | |
e133c8fa | 3708 | while (start <= end) |
1397dc18 KH |
3709 | coding->spec.ccl.valid_codes[start++] = 1; |
3710 | } | |
3711 | } | |
3712 | } | |
4ed46869 | 3713 | } |
c952af22 | 3714 | coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK; |
aaaf0b1e | 3715 | coding->spec.ccl.cr_carryover = 0; |
1c3478b0 | 3716 | coding->spec.ccl.eight_bit_carryover[0] = 0; |
4ed46869 KH |
3717 | break; |
3718 | ||
27901516 KH |
3719 | case 5: |
3720 | coding->type = coding_type_raw_text; | |
3721 | break; | |
3722 | ||
4ed46869 | 3723 | default: |
d46c5b12 | 3724 | goto label_invalid_coding_system; |
4ed46869 KH |
3725 | } |
3726 | return 0; | |
3727 | ||
3728 | label_invalid_coding_system: | |
3729 | coding->type = coding_type_no_conversion; | |
d46c5b12 | 3730 | coding->category_idx = CODING_CATEGORY_IDX_BINARY; |
c952af22 | 3731 | coding->common_flags = 0; |
dec137e5 | 3732 | coding->eol_type = CODING_EOL_LF; |
d46c5b12 | 3733 | coding->pre_write_conversion = coding->post_read_conversion = Qnil; |
4ed46869 KH |
3734 | return -1; |
3735 | } | |
3736 | ||
ec6d2bb8 KH |
3737 | /* Free memory blocks allocated for storing composition information. */ |
3738 | ||
3739 | void | |
3740 | coding_free_composition_data (coding) | |
3741 | struct coding_system *coding; | |
3742 | { | |
3743 | struct composition_data *cmp_data = coding->cmp_data, *next; | |
3744 | ||
3745 | if (!cmp_data) | |
3746 | return; | |
3747 | /* Memory blocks are chained. At first, rewind to the first, then, | |
3748 | free blocks one by one. */ | |
3749 | while (cmp_data->prev) | |
3750 | cmp_data = cmp_data->prev; | |
3751 | while (cmp_data) | |
3752 | { | |
3753 | next = cmp_data->next; | |
3754 | xfree (cmp_data); | |
3755 | cmp_data = next; | |
3756 | } | |
3757 | coding->cmp_data = NULL; | |
3758 | } | |
3759 | ||
3760 | /* Set `char_offset' member of all memory blocks pointed by | |
3761 | coding->cmp_data to POS. */ | |
3762 | ||
3763 | void | |
3764 | coding_adjust_composition_offset (coding, pos) | |
3765 | struct coding_system *coding; | |
3766 | int pos; | |
3767 | { | |
3768 | struct composition_data *cmp_data; | |
3769 | ||
3770 | for (cmp_data = coding->cmp_data; cmp_data; cmp_data = cmp_data->next) | |
3771 | cmp_data->char_offset = pos; | |
3772 | } | |
3773 | ||
54f78171 KH |
3774 | /* Setup raw-text or one of its subsidiaries in the structure |
3775 | coding_system CODING according to the already setup value eol_type | |
3776 | in CODING. CODING should be setup for some coding system in | |
3777 | advance. */ | |
3778 | ||
3779 | void | |
3780 | setup_raw_text_coding_system (coding) | |
3781 | struct coding_system *coding; | |
3782 | { | |
3783 | if (coding->type != coding_type_raw_text) | |
3784 | { | |
3785 | coding->symbol = Qraw_text; | |
3786 | coding->type = coding_type_raw_text; | |
3787 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
3788 | { | |
84d60297 RS |
3789 | Lisp_Object subsidiaries; |
3790 | subsidiaries = Fget (Qraw_text, Qeol_type); | |
54f78171 KH |
3791 | |
3792 | if (VECTORP (subsidiaries) | |
3793 | && XVECTOR (subsidiaries)->size == 3) | |
3794 | coding->symbol | |
3795 | = XVECTOR (subsidiaries)->contents[coding->eol_type]; | |
3796 | } | |
716e0b0a | 3797 | setup_coding_system (coding->symbol, coding); |
54f78171 KH |
3798 | } |
3799 | return; | |
3800 | } | |
3801 | ||
4ed46869 KH |
3802 | /* Emacs has a mechanism to automatically detect a coding system if it |
3803 | is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But, | |
3804 | it's impossible to distinguish some coding systems accurately | |
3805 | because they use the same range of codes. So, at first, coding | |
3806 | systems are categorized into 7, those are: | |
3807 | ||
0ef69138 | 3808 | o coding-category-emacs-mule |
4ed46869 KH |
3809 | |
3810 | The category for a coding system which has the same code range | |
3811 | as Emacs' internal format. Assigned the coding-system (Lisp | |
0ef69138 | 3812 | symbol) `emacs-mule' by default. |
4ed46869 KH |
3813 | |
3814 | o coding-category-sjis | |
3815 | ||
3816 | The category for a coding system which has the same code range | |
3817 | as SJIS. Assigned the coding-system (Lisp | |
7717c392 | 3818 | symbol) `japanese-shift-jis' by default. |
4ed46869 KH |
3819 | |
3820 | o coding-category-iso-7 | |
3821 | ||
3822 | The category for a coding system which has the same code range | |
7717c392 | 3823 | as ISO2022 of 7-bit environment. This doesn't use any locking |
d46c5b12 KH |
3824 | shift and single shift functions. This can encode/decode all |
3825 | charsets. Assigned the coding-system (Lisp symbol) | |
3826 | `iso-2022-7bit' by default. | |
3827 | ||
3828 | o coding-category-iso-7-tight | |
3829 | ||
3830 | Same as coding-category-iso-7 except that this can | |
3831 | encode/decode only the specified charsets. | |
4ed46869 KH |
3832 | |
3833 | o coding-category-iso-8-1 | |
3834 | ||
3835 | The category for a coding system which has the same code range | |
3836 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
3837 | for DIMENSION1 charset. This doesn't use any locking shift |
3838 | and single shift functions. Assigned the coding-system (Lisp | |
3839 | symbol) `iso-latin-1' by default. | |
4ed46869 KH |
3840 | |
3841 | o coding-category-iso-8-2 | |
3842 | ||
3843 | The category for a coding system which has the same code range | |
3844 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
3845 | for DIMENSION2 charset. This doesn't use any locking shift |
3846 | and single shift functions. Assigned the coding-system (Lisp | |
3847 | symbol) `japanese-iso-8bit' by default. | |
4ed46869 | 3848 | |
7717c392 | 3849 | o coding-category-iso-7-else |
4ed46869 KH |
3850 | |
3851 | The category for a coding system which has the same code range | |
8ca3766a | 3852 | as ISO2022 of 7-bit environment but uses locking shift or |
7717c392 KH |
3853 | single shift functions. Assigned the coding-system (Lisp |
3854 | symbol) `iso-2022-7bit-lock' by default. | |
3855 | ||
3856 | o coding-category-iso-8-else | |
3857 | ||
3858 | The category for a coding system which has the same code range | |
8ca3766a | 3859 | as ISO2022 of 8-bit environment but uses locking shift or |
7717c392 KH |
3860 | single shift functions. Assigned the coding-system (Lisp |
3861 | symbol) `iso-2022-8bit-ss2' by default. | |
4ed46869 KH |
3862 | |
3863 | o coding-category-big5 | |
3864 | ||
3865 | The category for a coding system which has the same code range | |
3866 | as BIG5. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 3867 | `cn-big5' by default. |
4ed46869 | 3868 | |
fa42c37f KH |
3869 | o coding-category-utf-8 |
3870 | ||
3871 | The category for a coding system which has the same code range | |
3872 | as UTF-8 (cf. RFC2279). Assigned the coding-system (Lisp | |
3873 | symbol) `utf-8' by default. | |
3874 | ||
3875 | o coding-category-utf-16-be | |
3876 | ||
3877 | The category for a coding system in which a text has an | |
3878 | Unicode signature (cf. Unicode Standard) in the order of BIG | |
3879 | endian at the head. Assigned the coding-system (Lisp symbol) | |
3880 | `utf-16-be' by default. | |
3881 | ||
3882 | o coding-category-utf-16-le | |
3883 | ||
3884 | The category for a coding system in which a text has an | |
3885 | Unicode signature (cf. Unicode Standard) in the order of | |
3886 | LITTLE endian at the head. Assigned the coding-system (Lisp | |
3887 | symbol) `utf-16-le' by default. | |
3888 | ||
1397dc18 KH |
3889 | o coding-category-ccl |
3890 | ||
3891 | The category for a coding system of which encoder/decoder is | |
3892 | written in CCL programs. The default value is nil, i.e., no | |
3893 | coding system is assigned. | |
3894 | ||
4ed46869 KH |
3895 | o coding-category-binary |
3896 | ||
3897 | The category for a coding system not categorized in any of the | |
3898 | above. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 3899 | `no-conversion' by default. |
4ed46869 KH |
3900 | |
3901 | Each of them is a Lisp symbol and the value is an actual | |
cfb43547 | 3902 | `coding-system' (this is also a Lisp symbol) assigned by a user. |
4ed46869 KH |
3903 | What Emacs does actually is to detect a category of coding system. |
3904 | Then, it uses a `coding-system' assigned to it. If Emacs can't | |
cfb43547 | 3905 | decide a single possible category, it selects a category of the |
4ed46869 KH |
3906 | highest priority. Priorities of categories are also specified by a |
3907 | user in a Lisp variable `coding-category-list'. | |
3908 | ||
3909 | */ | |
3910 | ||
66cfb530 KH |
3911 | static |
3912 | int ascii_skip_code[256]; | |
3913 | ||
d46c5b12 | 3914 | /* Detect how a text of length SRC_BYTES pointed by SOURCE is encoded. |
4ed46869 KH |
3915 | If it detects possible coding systems, return an integer in which |
3916 | appropriate flag bits are set. Flag bits are defined by macros | |
fa42c37f KH |
3917 | CODING_CATEGORY_MASK_XXX in `coding.h'. If PRIORITIES is non-NULL, |
3918 | it should point the table `coding_priorities'. In that case, only | |
3919 | the flag bit for a coding system of the highest priority is set in | |
0a28aafb KH |
3920 | the returned value. If MULTIBYTEP is nonzero, 8-bit codes of the |
3921 | range 0x80..0x9F are in multibyte form. | |
4ed46869 | 3922 | |
d46c5b12 KH |
3923 | How many ASCII characters are at the head is returned as *SKIP. */ |
3924 | ||
3925 | static int | |
0a28aafb | 3926 | detect_coding_mask (source, src_bytes, priorities, skip, multibytep) |
d46c5b12 KH |
3927 | unsigned char *source; |
3928 | int src_bytes, *priorities, *skip; | |
0a28aafb | 3929 | int multibytep; |
4ed46869 KH |
3930 | { |
3931 | register unsigned char c; | |
d46c5b12 | 3932 | unsigned char *src = source, *src_end = source + src_bytes; |
fa42c37f | 3933 | unsigned int mask, utf16_examined_p, iso2022_examined_p; |
da55a2b7 | 3934 | int i; |
4ed46869 KH |
3935 | |
3936 | /* At first, skip all ASCII characters and control characters except | |
3937 | for three ISO2022 specific control characters. */ | |
66cfb530 KH |
3938 | ascii_skip_code[ISO_CODE_SO] = 0; |
3939 | ascii_skip_code[ISO_CODE_SI] = 0; | |
3940 | ascii_skip_code[ISO_CODE_ESC] = 0; | |
3941 | ||
bcf26d6a | 3942 | label_loop_detect_coding: |
66cfb530 | 3943 | while (src < src_end && ascii_skip_code[*src]) src++; |
d46c5b12 | 3944 | *skip = src - source; |
4ed46869 KH |
3945 | |
3946 | if (src >= src_end) | |
3947 | /* We found nothing other than ASCII. There's nothing to do. */ | |
d46c5b12 | 3948 | return 0; |
4ed46869 | 3949 | |
8a8147d6 | 3950 | c = *src; |
4ed46869 KH |
3951 | /* The text seems to be encoded in some multilingual coding system. |
3952 | Now, try to find in which coding system the text is encoded. */ | |
3953 | if (c < 0x80) | |
bcf26d6a KH |
3954 | { |
3955 | /* i.e. (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) */ | |
3956 | /* C is an ISO2022 specific control code of C0. */ | |
0a28aafb | 3957 | mask = detect_coding_iso2022 (src, src_end, multibytep); |
1b2af4b0 | 3958 | if (mask == 0) |
d46c5b12 KH |
3959 | { |
3960 | /* No valid ISO2022 code follows C. Try again. */ | |
3961 | src++; | |
66cfb530 KH |
3962 | if (c == ISO_CODE_ESC) |
3963 | ascii_skip_code[ISO_CODE_ESC] = 1; | |
3964 | else | |
3965 | ascii_skip_code[ISO_CODE_SO] = ascii_skip_code[ISO_CODE_SI] = 1; | |
d46c5b12 KH |
3966 | goto label_loop_detect_coding; |
3967 | } | |
3968 | if (priorities) | |
fa42c37f KH |
3969 | { |
3970 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
3971 | { | |
3972 | if (mask & priorities[i]) | |
3973 | return priorities[i]; | |
3974 | } | |
3975 | return CODING_CATEGORY_MASK_RAW_TEXT; | |
3976 | } | |
bcf26d6a | 3977 | } |
d46c5b12 | 3978 | else |
c4825358 | 3979 | { |
d46c5b12 | 3980 | int try; |
4ed46869 | 3981 | |
0a28aafb | 3982 | if (multibytep && c == LEADING_CODE_8_BIT_CONTROL) |
67091e59 | 3983 | c = src[1] - 0x20; |
0a28aafb | 3984 | |
d46c5b12 KH |
3985 | if (c < 0xA0) |
3986 | { | |
3987 | /* C is the first byte of SJIS character code, | |
fa42c37f KH |
3988 | or a leading-code of Emacs' internal format (emacs-mule), |
3989 | or the first byte of UTF-16. */ | |
3990 | try = (CODING_CATEGORY_MASK_SJIS | |
3991 | | CODING_CATEGORY_MASK_EMACS_MULE | |
3992 | | CODING_CATEGORY_MASK_UTF_16_BE | |
3993 | | CODING_CATEGORY_MASK_UTF_16_LE); | |
d46c5b12 KH |
3994 | |
3995 | /* Or, if C is a special latin extra code, | |
3996 | or is an ISO2022 specific control code of C1 (SS2 or SS3), | |
3997 | or is an ISO2022 control-sequence-introducer (CSI), | |
3998 | we should also consider the possibility of ISO2022 codings. */ | |
3999 | if ((VECTORP (Vlatin_extra_code_table) | |
4000 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
4001 | || (c == ISO_CODE_SS2 || c == ISO_CODE_SS3) | |
4002 | || (c == ISO_CODE_CSI | |
4003 | && (src < src_end | |
4004 | && (*src == ']' | |
4005 | || ((*src == '0' || *src == '1' || *src == '2') | |
4006 | && src + 1 < src_end | |
4007 | && src[1] == ']'))))) | |
4008 | try |= (CODING_CATEGORY_MASK_ISO_8_ELSE | |
4009 | | CODING_CATEGORY_MASK_ISO_8BIT); | |
4010 | } | |
c4825358 | 4011 | else |
d46c5b12 KH |
4012 | /* C is a character of ISO2022 in graphic plane right, |
4013 | or a SJIS's 1-byte character code (i.e. JISX0201), | |
fa42c37f KH |
4014 | or the first byte of BIG5's 2-byte code, |
4015 | or the first byte of UTF-8/16. */ | |
d46c5b12 KH |
4016 | try = (CODING_CATEGORY_MASK_ISO_8_ELSE |
4017 | | CODING_CATEGORY_MASK_ISO_8BIT | |
4018 | | CODING_CATEGORY_MASK_SJIS | |
fa42c37f KH |
4019 | | CODING_CATEGORY_MASK_BIG5 |
4020 | | CODING_CATEGORY_MASK_UTF_8 | |
4021 | | CODING_CATEGORY_MASK_UTF_16_BE | |
4022 | | CODING_CATEGORY_MASK_UTF_16_LE); | |
d46c5b12 | 4023 | |
1397dc18 KH |
4024 | /* Or, we may have to consider the possibility of CCL. */ |
4025 | if (coding_system_table[CODING_CATEGORY_IDX_CCL] | |
4026 | && (coding_system_table[CODING_CATEGORY_IDX_CCL] | |
4027 | ->spec.ccl.valid_codes)[c]) | |
4028 | try |= CODING_CATEGORY_MASK_CCL; | |
4029 | ||
d46c5b12 | 4030 | mask = 0; |
fa42c37f | 4031 | utf16_examined_p = iso2022_examined_p = 0; |
d46c5b12 KH |
4032 | if (priorities) |
4033 | { | |
4034 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
4035 | { | |
fa42c37f KH |
4036 | if (!iso2022_examined_p |
4037 | && (priorities[i] & try & CODING_CATEGORY_MASK_ISO)) | |
4038 | { | |
4039 | mask |= detect_coding_iso2022 (src, src_end); | |
4040 | iso2022_examined_p = 1; | |
4041 | } | |
5ab13dd0 | 4042 | else if (priorities[i] & try & CODING_CATEGORY_MASK_SJIS) |
0a28aafb | 4043 | mask |= detect_coding_sjis (src, src_end, multibytep); |
fa42c37f | 4044 | else if (priorities[i] & try & CODING_CATEGORY_MASK_UTF_8) |
0a28aafb | 4045 | mask |= detect_coding_utf_8 (src, src_end, multibytep); |
fa42c37f KH |
4046 | else if (!utf16_examined_p |
4047 | && (priorities[i] & try & | |
4048 | CODING_CATEGORY_MASK_UTF_16_BE_LE)) | |
4049 | { | |
0a28aafb | 4050 | mask |= detect_coding_utf_16 (src, src_end, multibytep); |
fa42c37f KH |
4051 | utf16_examined_p = 1; |
4052 | } | |
5ab13dd0 | 4053 | else if (priorities[i] & try & CODING_CATEGORY_MASK_BIG5) |
0a28aafb | 4054 | mask |= detect_coding_big5 (src, src_end, multibytep); |
5ab13dd0 | 4055 | else if (priorities[i] & try & CODING_CATEGORY_MASK_EMACS_MULE) |
0a28aafb | 4056 | mask |= detect_coding_emacs_mule (src, src_end, multibytep); |
89fa8b36 | 4057 | else if (priorities[i] & try & CODING_CATEGORY_MASK_CCL) |
0a28aafb | 4058 | mask |= detect_coding_ccl (src, src_end, multibytep); |
5ab13dd0 | 4059 | else if (priorities[i] & CODING_CATEGORY_MASK_RAW_TEXT) |
fa42c37f | 4060 | mask |= CODING_CATEGORY_MASK_RAW_TEXT; |
5ab13dd0 | 4061 | else if (priorities[i] & CODING_CATEGORY_MASK_BINARY) |
fa42c37f KH |
4062 | mask |= CODING_CATEGORY_MASK_BINARY; |
4063 | if (mask & priorities[i]) | |
4064 | return priorities[i]; | |
d46c5b12 KH |
4065 | } |
4066 | return CODING_CATEGORY_MASK_RAW_TEXT; | |
4067 | } | |
4068 | if (try & CODING_CATEGORY_MASK_ISO) | |
0a28aafb | 4069 | mask |= detect_coding_iso2022 (src, src_end, multibytep); |
d46c5b12 | 4070 | if (try & CODING_CATEGORY_MASK_SJIS) |
0a28aafb | 4071 | mask |= detect_coding_sjis (src, src_end, multibytep); |
d46c5b12 | 4072 | if (try & CODING_CATEGORY_MASK_BIG5) |
0a28aafb | 4073 | mask |= detect_coding_big5 (src, src_end, multibytep); |
fa42c37f | 4074 | if (try & CODING_CATEGORY_MASK_UTF_8) |
0a28aafb | 4075 | mask |= detect_coding_utf_8 (src, src_end, multibytep); |
fa42c37f | 4076 | if (try & CODING_CATEGORY_MASK_UTF_16_BE_LE) |
0a28aafb | 4077 | mask |= detect_coding_utf_16 (src, src_end, multibytep); |
d46c5b12 | 4078 | if (try & CODING_CATEGORY_MASK_EMACS_MULE) |
0a28aafb | 4079 | mask |= detect_coding_emacs_mule (src, src_end, multibytep); |
1397dc18 | 4080 | if (try & CODING_CATEGORY_MASK_CCL) |
0a28aafb | 4081 | mask |= detect_coding_ccl (src, src_end, multibytep); |
c4825358 | 4082 | } |
5ab13dd0 | 4083 | return (mask | CODING_CATEGORY_MASK_RAW_TEXT | CODING_CATEGORY_MASK_BINARY); |
4ed46869 KH |
4084 | } |
4085 | ||
4086 | /* Detect how a text of length SRC_BYTES pointed by SRC is encoded. | |
4087 | The information of the detected coding system is set in CODING. */ | |
4088 | ||
4089 | void | |
4090 | detect_coding (coding, src, src_bytes) | |
4091 | struct coding_system *coding; | |
4092 | unsigned char *src; | |
4093 | int src_bytes; | |
4094 | { | |
d46c5b12 | 4095 | unsigned int idx; |
da55a2b7 | 4096 | int skip, mask; |
84d60297 | 4097 | Lisp_Object val; |
4ed46869 | 4098 | |
84d60297 | 4099 | val = Vcoding_category_list; |
64c1e55f KH |
4100 | mask = detect_coding_mask (src, src_bytes, coding_priorities, &skip, |
4101 | coding->src_multibyte); | |
d46c5b12 | 4102 | coding->heading_ascii = skip; |
4ed46869 | 4103 | |
d46c5b12 KH |
4104 | if (!mask) return; |
4105 | ||
4106 | /* We found a single coding system of the highest priority in MASK. */ | |
4107 | idx = 0; | |
4108 | while (mask && ! (mask & 1)) mask >>= 1, idx++; | |
4109 | if (! mask) | |
4110 | idx = CODING_CATEGORY_IDX_RAW_TEXT; | |
4ed46869 | 4111 | |
d46c5b12 KH |
4112 | val = XSYMBOL (XVECTOR (Vcoding_category_table)->contents[idx])->value; |
4113 | ||
4114 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
27901516 | 4115 | { |
84d60297 | 4116 | Lisp_Object tmp; |
d46c5b12 | 4117 | |
84d60297 | 4118 | tmp = Fget (val, Qeol_type); |
d46c5b12 KH |
4119 | if (VECTORP (tmp)) |
4120 | val = XVECTOR (tmp)->contents[coding->eol_type]; | |
4ed46869 | 4121 | } |
b73bfc1c KH |
4122 | |
4123 | /* Setup this new coding system while preserving some slots. */ | |
4124 | { | |
4125 | int src_multibyte = coding->src_multibyte; | |
4126 | int dst_multibyte = coding->dst_multibyte; | |
4127 | ||
4128 | setup_coding_system (val, coding); | |
4129 | coding->src_multibyte = src_multibyte; | |
4130 | coding->dst_multibyte = dst_multibyte; | |
4131 | coding->heading_ascii = skip; | |
4132 | } | |
4ed46869 KH |
4133 | } |
4134 | ||
d46c5b12 KH |
4135 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by |
4136 | SOURCE is encoded. Return one of CODING_EOL_LF, CODING_EOL_CRLF, | |
4137 | CODING_EOL_CR, and CODING_EOL_UNDECIDED. | |
4138 | ||
4139 | How many non-eol characters are at the head is returned as *SKIP. */ | |
4ed46869 | 4140 | |
bc4bc72a RS |
4141 | #define MAX_EOL_CHECK_COUNT 3 |
4142 | ||
d46c5b12 KH |
4143 | static int |
4144 | detect_eol_type (source, src_bytes, skip) | |
4145 | unsigned char *source; | |
4146 | int src_bytes, *skip; | |
4ed46869 | 4147 | { |
d46c5b12 | 4148 | unsigned char *src = source, *src_end = src + src_bytes; |
4ed46869 | 4149 | unsigned char c; |
bc4bc72a RS |
4150 | int total = 0; /* How many end-of-lines are found so far. */ |
4151 | int eol_type = CODING_EOL_UNDECIDED; | |
4152 | int this_eol_type; | |
4ed46869 | 4153 | |
d46c5b12 KH |
4154 | *skip = 0; |
4155 | ||
bc4bc72a | 4156 | while (src < src_end && total < MAX_EOL_CHECK_COUNT) |
4ed46869 KH |
4157 | { |
4158 | c = *src++; | |
bc4bc72a | 4159 | if (c == '\n' || c == '\r') |
4ed46869 | 4160 | { |
d46c5b12 KH |
4161 | if (*skip == 0) |
4162 | *skip = src - 1 - source; | |
bc4bc72a RS |
4163 | total++; |
4164 | if (c == '\n') | |
4165 | this_eol_type = CODING_EOL_LF; | |
4166 | else if (src >= src_end || *src != '\n') | |
4167 | this_eol_type = CODING_EOL_CR; | |
4ed46869 | 4168 | else |
bc4bc72a RS |
4169 | this_eol_type = CODING_EOL_CRLF, src++; |
4170 | ||
4171 | if (eol_type == CODING_EOL_UNDECIDED) | |
4172 | /* This is the first end-of-line. */ | |
4173 | eol_type = this_eol_type; | |
4174 | else if (eol_type != this_eol_type) | |
d46c5b12 KH |
4175 | { |
4176 | /* The found type is different from what found before. */ | |
4177 | eol_type = CODING_EOL_INCONSISTENT; | |
4178 | break; | |
4179 | } | |
4ed46869 KH |
4180 | } |
4181 | } | |
bc4bc72a | 4182 | |
d46c5b12 KH |
4183 | if (*skip == 0) |
4184 | *skip = src_end - source; | |
85a02ca4 | 4185 | return eol_type; |
4ed46869 KH |
4186 | } |
4187 | ||
fa42c37f KH |
4188 | /* Like detect_eol_type, but detect EOL type in 2-octet |
4189 | big-endian/little-endian format for coding systems utf-16-be and | |
4190 | utf-16-le. */ | |
4191 | ||
4192 | static int | |
4193 | detect_eol_type_in_2_octet_form (source, src_bytes, skip, big_endian_p) | |
4194 | unsigned char *source; | |
cfb43547 | 4195 | int src_bytes, *skip, big_endian_p; |
fa42c37f KH |
4196 | { |
4197 | unsigned char *src = source, *src_end = src + src_bytes; | |
4198 | unsigned int c1, c2; | |
4199 | int total = 0; /* How many end-of-lines are found so far. */ | |
4200 | int eol_type = CODING_EOL_UNDECIDED; | |
4201 | int this_eol_type; | |
4202 | int msb, lsb; | |
4203 | ||
4204 | if (big_endian_p) | |
4205 | msb = 0, lsb = 1; | |
4206 | else | |
4207 | msb = 1, lsb = 0; | |
4208 | ||
4209 | *skip = 0; | |
4210 | ||
4211 | while ((src + 1) < src_end && total < MAX_EOL_CHECK_COUNT) | |
4212 | { | |
4213 | c1 = (src[msb] << 8) | (src[lsb]); | |
4214 | src += 2; | |
4215 | ||
4216 | if (c1 == '\n' || c1 == '\r') | |
4217 | { | |
4218 | if (*skip == 0) | |
4219 | *skip = src - 2 - source; | |
4220 | total++; | |
4221 | if (c1 == '\n') | |
4222 | { | |
4223 | this_eol_type = CODING_EOL_LF; | |
4224 | } | |
4225 | else | |
4226 | { | |
4227 | if ((src + 1) >= src_end) | |
4228 | { | |
4229 | this_eol_type = CODING_EOL_CR; | |
4230 | } | |
4231 | else | |
4232 | { | |
4233 | c2 = (src[msb] << 8) | (src[lsb]); | |
4234 | if (c2 == '\n') | |
4235 | this_eol_type = CODING_EOL_CRLF, src += 2; | |
4236 | else | |
4237 | this_eol_type = CODING_EOL_CR; | |
4238 | } | |
4239 | } | |
4240 | ||
4241 | if (eol_type == CODING_EOL_UNDECIDED) | |
4242 | /* This is the first end-of-line. */ | |
4243 | eol_type = this_eol_type; | |
4244 | else if (eol_type != this_eol_type) | |
4245 | { | |
4246 | /* The found type is different from what found before. */ | |
4247 | eol_type = CODING_EOL_INCONSISTENT; | |
4248 | break; | |
4249 | } | |
4250 | } | |
4251 | } | |
4252 | ||
4253 | if (*skip == 0) | |
4254 | *skip = src_end - source; | |
4255 | return eol_type; | |
4256 | } | |
4257 | ||
4ed46869 KH |
4258 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by SRC |
4259 | is encoded. If it detects an appropriate format of end-of-line, it | |
4260 | sets the information in *CODING. */ | |
4261 | ||
4262 | void | |
4263 | detect_eol (coding, src, src_bytes) | |
4264 | struct coding_system *coding; | |
4265 | unsigned char *src; | |
4266 | int src_bytes; | |
4267 | { | |
4608c386 | 4268 | Lisp_Object val; |
d46c5b12 | 4269 | int skip; |
fa42c37f KH |
4270 | int eol_type; |
4271 | ||
4272 | switch (coding->category_idx) | |
4273 | { | |
4274 | case CODING_CATEGORY_IDX_UTF_16_BE: | |
4275 | eol_type = detect_eol_type_in_2_octet_form (src, src_bytes, &skip, 1); | |
4276 | break; | |
4277 | case CODING_CATEGORY_IDX_UTF_16_LE: | |
4278 | eol_type = detect_eol_type_in_2_octet_form (src, src_bytes, &skip, 0); | |
4279 | break; | |
4280 | default: | |
4281 | eol_type = detect_eol_type (src, src_bytes, &skip); | |
4282 | break; | |
4283 | } | |
d46c5b12 KH |
4284 | |
4285 | if (coding->heading_ascii > skip) | |
4286 | coding->heading_ascii = skip; | |
4287 | else | |
4288 | skip = coding->heading_ascii; | |
4ed46869 | 4289 | |
0ef69138 | 4290 | if (eol_type == CODING_EOL_UNDECIDED) |
4ed46869 | 4291 | return; |
27901516 KH |
4292 | if (eol_type == CODING_EOL_INCONSISTENT) |
4293 | { | |
4294 | #if 0 | |
4295 | /* This code is suppressed until we find a better way to | |
992f23f2 | 4296 | distinguish raw text file and binary file. */ |
27901516 KH |
4297 | |
4298 | /* If we have already detected that the coding is raw-text, the | |
4299 | coding should actually be no-conversion. */ | |
4300 | if (coding->type == coding_type_raw_text) | |
4301 | { | |
4302 | setup_coding_system (Qno_conversion, coding); | |
4303 | return; | |
4304 | } | |
4305 | /* Else, let's decode only text code anyway. */ | |
4306 | #endif /* 0 */ | |
1b2af4b0 | 4307 | eol_type = CODING_EOL_LF; |
27901516 KH |
4308 | } |
4309 | ||
4608c386 | 4310 | val = Fget (coding->symbol, Qeol_type); |
4ed46869 | 4311 | if (VECTORP (val) && XVECTOR (val)->size == 3) |
d46c5b12 | 4312 | { |
b73bfc1c KH |
4313 | int src_multibyte = coding->src_multibyte; |
4314 | int dst_multibyte = coding->dst_multibyte; | |
4315 | ||
d46c5b12 | 4316 | setup_coding_system (XVECTOR (val)->contents[eol_type], coding); |
b73bfc1c KH |
4317 | coding->src_multibyte = src_multibyte; |
4318 | coding->dst_multibyte = dst_multibyte; | |
d46c5b12 KH |
4319 | coding->heading_ascii = skip; |
4320 | } | |
4321 | } | |
4322 | ||
4323 | #define CONVERSION_BUFFER_EXTRA_ROOM 256 | |
4324 | ||
b73bfc1c KH |
4325 | #define DECODING_BUFFER_MAG(coding) \ |
4326 | (coding->type == coding_type_iso2022 \ | |
4327 | ? 3 \ | |
4328 | : (coding->type == coding_type_ccl \ | |
4329 | ? coding->spec.ccl.decoder.buf_magnification \ | |
4330 | : 2)) | |
d46c5b12 KH |
4331 | |
4332 | /* Return maximum size (bytes) of a buffer enough for decoding | |
4333 | SRC_BYTES of text encoded in CODING. */ | |
4334 | ||
4335 | int | |
4336 | decoding_buffer_size (coding, src_bytes) | |
4337 | struct coding_system *coding; | |
4338 | int src_bytes; | |
4339 | { | |
4340 | return (src_bytes * DECODING_BUFFER_MAG (coding) | |
4341 | + CONVERSION_BUFFER_EXTRA_ROOM); | |
4342 | } | |
4343 | ||
4344 | /* Return maximum size (bytes) of a buffer enough for encoding | |
4345 | SRC_BYTES of text to CODING. */ | |
4346 | ||
4347 | int | |
4348 | encoding_buffer_size (coding, src_bytes) | |
4349 | struct coding_system *coding; | |
4350 | int src_bytes; | |
4351 | { | |
4352 | int magnification; | |
4353 | ||
4354 | if (coding->type == coding_type_ccl) | |
4355 | magnification = coding->spec.ccl.encoder.buf_magnification; | |
b73bfc1c | 4356 | else if (CODING_REQUIRE_ENCODING (coding)) |
d46c5b12 | 4357 | magnification = 3; |
b73bfc1c KH |
4358 | else |
4359 | magnification = 1; | |
d46c5b12 KH |
4360 | |
4361 | return (src_bytes * magnification + CONVERSION_BUFFER_EXTRA_ROOM); | |
4362 | } | |
4363 | ||
73be902c KH |
4364 | /* Working buffer for code conversion. */ |
4365 | struct conversion_buffer | |
4366 | { | |
4367 | int size; /* size of data. */ | |
4368 | int on_stack; /* 1 if allocated by alloca. */ | |
4369 | unsigned char *data; | |
4370 | }; | |
d46c5b12 | 4371 | |
73be902c KH |
4372 | /* Don't use alloca for allocating memory space larger than this, lest |
4373 | we overflow their stack. */ | |
4374 | #define MAX_ALLOCA 16*1024 | |
d46c5b12 | 4375 | |
73be902c KH |
4376 | /* Allocate LEN bytes of memory for BUF (struct conversion_buffer). */ |
4377 | #define allocate_conversion_buffer(buf, len) \ | |
4378 | do { \ | |
4379 | if (len < MAX_ALLOCA) \ | |
4380 | { \ | |
4381 | buf.data = (unsigned char *) alloca (len); \ | |
4382 | buf.on_stack = 1; \ | |
4383 | } \ | |
4384 | else \ | |
4385 | { \ | |
4386 | buf.data = (unsigned char *) xmalloc (len); \ | |
4387 | buf.on_stack = 0; \ | |
4388 | } \ | |
4389 | buf.size = len; \ | |
4390 | } while (0) | |
d46c5b12 | 4391 | |
73be902c KH |
4392 | /* Double the allocated memory for *BUF. */ |
4393 | static void | |
4394 | extend_conversion_buffer (buf) | |
4395 | struct conversion_buffer *buf; | |
d46c5b12 | 4396 | { |
73be902c | 4397 | if (buf->on_stack) |
d46c5b12 | 4398 | { |
73be902c KH |
4399 | unsigned char *save = buf->data; |
4400 | buf->data = (unsigned char *) xmalloc (buf->size * 2); | |
4401 | bcopy (save, buf->data, buf->size); | |
4402 | buf->on_stack = 0; | |
d46c5b12 | 4403 | } |
73be902c KH |
4404 | else |
4405 | { | |
4406 | buf->data = (unsigned char *) xrealloc (buf->data, buf->size * 2); | |
4407 | } | |
4408 | buf->size *= 2; | |
4409 | } | |
4410 | ||
4411 | /* Free the allocated memory for BUF if it is not on stack. */ | |
4412 | static void | |
4413 | free_conversion_buffer (buf) | |
4414 | struct conversion_buffer *buf; | |
4415 | { | |
4416 | if (!buf->on_stack) | |
4417 | xfree (buf->data); | |
d46c5b12 KH |
4418 | } |
4419 | ||
4420 | int | |
4421 | ccl_coding_driver (coding, source, destination, src_bytes, dst_bytes, encodep) | |
4422 | struct coding_system *coding; | |
4423 | unsigned char *source, *destination; | |
4424 | int src_bytes, dst_bytes, encodep; | |
4425 | { | |
4426 | struct ccl_program *ccl | |
4427 | = encodep ? &coding->spec.ccl.encoder : &coding->spec.ccl.decoder; | |
1c3478b0 | 4428 | unsigned char *dst = destination; |
d46c5b12 | 4429 | |
bd64290d | 4430 | ccl->suppress_error = coding->suppress_error; |
ae9ff118 | 4431 | ccl->last_block = coding->mode & CODING_MODE_LAST_BLOCK; |
aaaf0b1e | 4432 | if (encodep) |
80e0ca99 KH |
4433 | { |
4434 | /* On encoding, EOL format is converted within ccl_driver. For | |
4435 | that, setup proper information in the structure CCL. */ | |
4436 | ccl->eol_type = coding->eol_type; | |
4437 | if (ccl->eol_type ==CODING_EOL_UNDECIDED) | |
4438 | ccl->eol_type = CODING_EOL_LF; | |
4439 | ccl->cr_consumed = coding->spec.ccl.cr_carryover; | |
4440 | } | |
7272d75c | 4441 | ccl->multibyte = coding->src_multibyte; |
1c3478b0 KH |
4442 | if (coding->spec.ccl.eight_bit_carryover[0] != 0) |
4443 | { | |
4444 | /* Move carryover bytes to DESTINATION. */ | |
4445 | unsigned char *p = coding->spec.ccl.eight_bit_carryover; | |
4446 | while (*p) | |
4447 | *dst++ = *p++; | |
4448 | coding->spec.ccl.eight_bit_carryover[0] = 0; | |
4449 | if (dst_bytes) | |
4450 | dst_bytes -= dst - destination; | |
4451 | } | |
4452 | ||
4453 | coding->produced = (ccl_driver (ccl, source, dst, src_bytes, dst_bytes, | |
4454 | &(coding->consumed)) | |
4455 | + dst - destination); | |
4456 | ||
b73bfc1c | 4457 | if (encodep) |
80e0ca99 KH |
4458 | { |
4459 | coding->produced_char = coding->produced; | |
4460 | coding->spec.ccl.cr_carryover = ccl->cr_consumed; | |
4461 | } | |
ade8d05e KH |
4462 | else if (!ccl->eight_bit_control) |
4463 | { | |
4464 | /* The produced bytes forms a valid multibyte sequence. */ | |
4465 | coding->produced_char | |
4466 | = multibyte_chars_in_text (destination, coding->produced); | |
4467 | coding->spec.ccl.eight_bit_carryover[0] = 0; | |
4468 | } | |
b73bfc1c KH |
4469 | else |
4470 | { | |
1c3478b0 KH |
4471 | /* On decoding, the destination should always multibyte. But, |
4472 | CCL program might have been generated an invalid multibyte | |
4473 | sequence. Here we make such a sequence valid as | |
4474 | multibyte. */ | |
b73bfc1c KH |
4475 | int bytes |
4476 | = dst_bytes ? dst_bytes : source + coding->consumed - destination; | |
1c3478b0 KH |
4477 | |
4478 | if ((coding->consumed < src_bytes | |
4479 | || !ccl->last_block) | |
4480 | && coding->produced >= 1 | |
4481 | && destination[coding->produced - 1] >= 0x80) | |
4482 | { | |
4483 | /* We should not convert the tailing 8-bit codes to | |
4484 | multibyte form even if they doesn't form a valid | |
4485 | multibyte sequence. They may form a valid sequence in | |
4486 | the next call. */ | |
4487 | int carryover = 0; | |
4488 | ||
4489 | if (destination[coding->produced - 1] < 0xA0) | |
4490 | carryover = 1; | |
4491 | else if (coding->produced >= 2) | |
4492 | { | |
4493 | if (destination[coding->produced - 2] >= 0x80) | |
4494 | { | |
4495 | if (destination[coding->produced - 2] < 0xA0) | |
4496 | carryover = 2; | |
4497 | else if (coding->produced >= 3 | |
4498 | && destination[coding->produced - 3] >= 0x80 | |
4499 | && destination[coding->produced - 3] < 0xA0) | |
4500 | carryover = 3; | |
4501 | } | |
4502 | } | |
4503 | if (carryover > 0) | |
4504 | { | |
4505 | BCOPY_SHORT (destination + coding->produced - carryover, | |
4506 | coding->spec.ccl.eight_bit_carryover, | |
4507 | carryover); | |
4508 | coding->spec.ccl.eight_bit_carryover[carryover] = 0; | |
4509 | coding->produced -= carryover; | |
4510 | } | |
4511 | } | |
b73bfc1c KH |
4512 | coding->produced = str_as_multibyte (destination, bytes, |
4513 | coding->produced, | |
4514 | &(coding->produced_char)); | |
4515 | } | |
69f76525 | 4516 | |
d46c5b12 KH |
4517 | switch (ccl->status) |
4518 | { | |
4519 | case CCL_STAT_SUSPEND_BY_SRC: | |
73be902c | 4520 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; |
d46c5b12 KH |
4521 | break; |
4522 | case CCL_STAT_SUSPEND_BY_DST: | |
73be902c | 4523 | coding->result = CODING_FINISH_INSUFFICIENT_DST; |
d46c5b12 | 4524 | break; |
9864ebce KH |
4525 | case CCL_STAT_QUIT: |
4526 | case CCL_STAT_INVALID_CMD: | |
73be902c | 4527 | coding->result = CODING_FINISH_INTERRUPT; |
9864ebce | 4528 | break; |
d46c5b12 | 4529 | default: |
73be902c | 4530 | coding->result = CODING_FINISH_NORMAL; |
d46c5b12 KH |
4531 | break; |
4532 | } | |
73be902c | 4533 | return coding->result; |
4ed46869 KH |
4534 | } |
4535 | ||
aaaf0b1e KH |
4536 | /* Decode EOL format of the text at PTR of BYTES length destructively |
4537 | according to CODING->eol_type. This is called after the CCL | |
4538 | program produced a decoded text at PTR. If we do CRLF->LF | |
4539 | conversion, update CODING->produced and CODING->produced_char. */ | |
4540 | ||
4541 | static void | |
4542 | decode_eol_post_ccl (coding, ptr, bytes) | |
4543 | struct coding_system *coding; | |
4544 | unsigned char *ptr; | |
4545 | int bytes; | |
4546 | { | |
4547 | Lisp_Object val, saved_coding_symbol; | |
4548 | unsigned char *pend = ptr + bytes; | |
4549 | int dummy; | |
4550 | ||
4551 | /* Remember the current coding system symbol. We set it back when | |
4552 | an inconsistent EOL is found so that `last-coding-system-used' is | |
4553 | set to the coding system that doesn't specify EOL conversion. */ | |
4554 | saved_coding_symbol = coding->symbol; | |
4555 | ||
4556 | coding->spec.ccl.cr_carryover = 0; | |
4557 | if (coding->eol_type == CODING_EOL_UNDECIDED) | |
4558 | { | |
4559 | /* Here, to avoid the call of setup_coding_system, we directly | |
4560 | call detect_eol_type. */ | |
4561 | coding->eol_type = detect_eol_type (ptr, bytes, &dummy); | |
74b01b80 EZ |
4562 | if (coding->eol_type == CODING_EOL_INCONSISTENT) |
4563 | coding->eol_type = CODING_EOL_LF; | |
4564 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
4565 | { | |
4566 | val = Fget (coding->symbol, Qeol_type); | |
4567 | if (VECTORP (val) && XVECTOR (val)->size == 3) | |
4568 | coding->symbol = XVECTOR (val)->contents[coding->eol_type]; | |
4569 | } | |
aaaf0b1e KH |
4570 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
4571 | } | |
4572 | ||
74b01b80 EZ |
4573 | if (coding->eol_type == CODING_EOL_LF |
4574 | || coding->eol_type == CODING_EOL_UNDECIDED) | |
aaaf0b1e KH |
4575 | { |
4576 | /* We have nothing to do. */ | |
4577 | ptr = pend; | |
4578 | } | |
4579 | else if (coding->eol_type == CODING_EOL_CRLF) | |
4580 | { | |
4581 | unsigned char *pstart = ptr, *p = ptr; | |
4582 | ||
4583 | if (! (coding->mode & CODING_MODE_LAST_BLOCK) | |
4584 | && *(pend - 1) == '\r') | |
4585 | { | |
4586 | /* If the last character is CR, we can't handle it here | |
4587 | because LF will be in the not-yet-decoded source text. | |
4588 | Recorded that the CR is not yet processed. */ | |
4589 | coding->spec.ccl.cr_carryover = 1; | |
4590 | coding->produced--; | |
4591 | coding->produced_char--; | |
4592 | pend--; | |
4593 | } | |
4594 | while (ptr < pend) | |
4595 | { | |
4596 | if (*ptr == '\r') | |
4597 | { | |
4598 | if (ptr + 1 < pend && *(ptr + 1) == '\n') | |
4599 | { | |
4600 | *p++ = '\n'; | |
4601 | ptr += 2; | |
4602 | } | |
4603 | else | |
4604 | { | |
4605 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4606 | goto undo_eol_conversion; | |
4607 | *p++ = *ptr++; | |
4608 | } | |
4609 | } | |
4610 | else if (*ptr == '\n' | |
4611 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4612 | goto undo_eol_conversion; | |
4613 | else | |
4614 | *p++ = *ptr++; | |
4615 | continue; | |
4616 | ||
4617 | undo_eol_conversion: | |
4618 | /* We have faced with inconsistent EOL format at PTR. | |
4619 | Convert all LFs before PTR back to CRLFs. */ | |
4620 | for (p--, ptr--; p >= pstart; p--) | |
4621 | { | |
4622 | if (*p == '\n') | |
4623 | *ptr-- = '\n', *ptr-- = '\r'; | |
4624 | else | |
4625 | *ptr-- = *p; | |
4626 | } | |
4627 | /* If carryover is recorded, cancel it because we don't | |
4628 | convert CRLF anymore. */ | |
4629 | if (coding->spec.ccl.cr_carryover) | |
4630 | { | |
4631 | coding->spec.ccl.cr_carryover = 0; | |
4632 | coding->produced++; | |
4633 | coding->produced_char++; | |
4634 | pend++; | |
4635 | } | |
4636 | p = ptr = pend; | |
4637 | coding->eol_type = CODING_EOL_LF; | |
4638 | coding->symbol = saved_coding_symbol; | |
4639 | } | |
4640 | if (p < pend) | |
4641 | { | |
4642 | /* As each two-byte sequence CRLF was converted to LF, (PEND | |
4643 | - P) is the number of deleted characters. */ | |
4644 | coding->produced -= pend - p; | |
4645 | coding->produced_char -= pend - p; | |
4646 | } | |
4647 | } | |
4648 | else /* i.e. coding->eol_type == CODING_EOL_CR */ | |
4649 | { | |
4650 | unsigned char *p = ptr; | |
4651 | ||
4652 | for (; ptr < pend; ptr++) | |
4653 | { | |
4654 | if (*ptr == '\r') | |
4655 | *ptr = '\n'; | |
4656 | else if (*ptr == '\n' | |
4657 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4658 | { | |
4659 | for (; p < ptr; p++) | |
4660 | { | |
4661 | if (*p == '\n') | |
4662 | *p = '\r'; | |
4663 | } | |
4664 | ptr = pend; | |
4665 | coding->eol_type = CODING_EOL_LF; | |
4666 | coding->symbol = saved_coding_symbol; | |
4667 | } | |
4668 | } | |
4669 | } | |
4670 | } | |
4671 | ||
4ed46869 KH |
4672 | /* See "GENERAL NOTES about `decode_coding_XXX ()' functions". Before |
4673 | decoding, it may detect coding system and format of end-of-line if | |
b73bfc1c KH |
4674 | those are not yet decided. The source should be unibyte, the |
4675 | result is multibyte if CODING->dst_multibyte is nonzero, else | |
4676 | unibyte. */ | |
4ed46869 KH |
4677 | |
4678 | int | |
d46c5b12 | 4679 | decode_coding (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
4680 | struct coding_system *coding; |
4681 | unsigned char *source, *destination; | |
4682 | int src_bytes, dst_bytes; | |
4ed46869 | 4683 | { |
0ef69138 | 4684 | if (coding->type == coding_type_undecided) |
4ed46869 KH |
4685 | detect_coding (coding, source, src_bytes); |
4686 | ||
aaaf0b1e KH |
4687 | if (coding->eol_type == CODING_EOL_UNDECIDED |
4688 | && coding->type != coding_type_ccl) | |
8844fa83 KH |
4689 | { |
4690 | detect_eol (coding, source, src_bytes); | |
4691 | /* We had better recover the original eol format if we | |
8ca3766a | 4692 | encounter an inconsistent eol format while decoding. */ |
8844fa83 KH |
4693 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
4694 | } | |
4ed46869 | 4695 | |
b73bfc1c KH |
4696 | coding->produced = coding->produced_char = 0; |
4697 | coding->consumed = coding->consumed_char = 0; | |
4698 | coding->errors = 0; | |
4699 | coding->result = CODING_FINISH_NORMAL; | |
4700 | ||
4ed46869 KH |
4701 | switch (coding->type) |
4702 | { | |
4ed46869 | 4703 | case coding_type_sjis: |
b73bfc1c KH |
4704 | decode_coding_sjis_big5 (coding, source, destination, |
4705 | src_bytes, dst_bytes, 1); | |
4ed46869 KH |
4706 | break; |
4707 | ||
4708 | case coding_type_iso2022: | |
b73bfc1c KH |
4709 | decode_coding_iso2022 (coding, source, destination, |
4710 | src_bytes, dst_bytes); | |
4ed46869 KH |
4711 | break; |
4712 | ||
4713 | case coding_type_big5: | |
b73bfc1c KH |
4714 | decode_coding_sjis_big5 (coding, source, destination, |
4715 | src_bytes, dst_bytes, 0); | |
4716 | break; | |
4717 | ||
4718 | case coding_type_emacs_mule: | |
4719 | decode_coding_emacs_mule (coding, source, destination, | |
4720 | src_bytes, dst_bytes); | |
4ed46869 KH |
4721 | break; |
4722 | ||
4723 | case coding_type_ccl: | |
aaaf0b1e KH |
4724 | if (coding->spec.ccl.cr_carryover) |
4725 | { | |
4726 | /* Set the CR which is not processed by the previous call of | |
4727 | decode_eol_post_ccl in DESTINATION. */ | |
4728 | *destination = '\r'; | |
4729 | coding->produced++; | |
4730 | coding->produced_char++; | |
4731 | dst_bytes--; | |
4732 | } | |
4733 | ccl_coding_driver (coding, source, | |
4734 | destination + coding->spec.ccl.cr_carryover, | |
b73bfc1c | 4735 | src_bytes, dst_bytes, 0); |
aaaf0b1e KH |
4736 | if (coding->eol_type != CODING_EOL_LF) |
4737 | decode_eol_post_ccl (coding, destination, coding->produced); | |
d46c5b12 KH |
4738 | break; |
4739 | ||
b73bfc1c KH |
4740 | default: |
4741 | decode_eol (coding, source, destination, src_bytes, dst_bytes); | |
4742 | } | |
4743 | ||
4744 | if (coding->result == CODING_FINISH_INSUFFICIENT_SRC | |
e7c9eef9 | 4745 | && coding->mode & CODING_MODE_LAST_BLOCK |
b73bfc1c KH |
4746 | && coding->consumed == src_bytes) |
4747 | coding->result = CODING_FINISH_NORMAL; | |
4748 | ||
4749 | if (coding->mode & CODING_MODE_LAST_BLOCK | |
4750 | && coding->result == CODING_FINISH_INSUFFICIENT_SRC) | |
4751 | { | |
4752 | unsigned char *src = source + coding->consumed; | |
4753 | unsigned char *dst = destination + coding->produced; | |
4754 | ||
4755 | src_bytes -= coding->consumed; | |
bb10be8b | 4756 | coding->errors++; |
b73bfc1c KH |
4757 | if (COMPOSING_P (coding)) |
4758 | DECODE_COMPOSITION_END ('1'); | |
4759 | while (src_bytes--) | |
d46c5b12 | 4760 | { |
b73bfc1c KH |
4761 | int c = *src++; |
4762 | dst += CHAR_STRING (c, dst); | |
4763 | coding->produced_char++; | |
d46c5b12 | 4764 | } |
b73bfc1c KH |
4765 | coding->consumed = coding->consumed_char = src - source; |
4766 | coding->produced = dst - destination; | |
73be902c | 4767 | coding->result = CODING_FINISH_NORMAL; |
4ed46869 KH |
4768 | } |
4769 | ||
b73bfc1c KH |
4770 | if (!coding->dst_multibyte) |
4771 | { | |
4772 | coding->produced = str_as_unibyte (destination, coding->produced); | |
4773 | coding->produced_char = coding->produced; | |
4774 | } | |
4ed46869 | 4775 | |
b73bfc1c KH |
4776 | return coding->result; |
4777 | } | |
52d41803 | 4778 | |
b73bfc1c KH |
4779 | /* See "GENERAL NOTES about `encode_coding_XXX ()' functions". The |
4780 | multibyteness of the source is CODING->src_multibyte, the | |
4781 | multibyteness of the result is always unibyte. */ | |
4ed46869 KH |
4782 | |
4783 | int | |
d46c5b12 | 4784 | encode_coding (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
4785 | struct coding_system *coding; |
4786 | unsigned char *source, *destination; | |
4787 | int src_bytes, dst_bytes; | |
4ed46869 | 4788 | { |
b73bfc1c KH |
4789 | coding->produced = coding->produced_char = 0; |
4790 | coding->consumed = coding->consumed_char = 0; | |
4791 | coding->errors = 0; | |
4792 | coding->result = CODING_FINISH_NORMAL; | |
4ed46869 | 4793 | |
d46c5b12 KH |
4794 | switch (coding->type) |
4795 | { | |
4ed46869 | 4796 | case coding_type_sjis: |
b73bfc1c KH |
4797 | encode_coding_sjis_big5 (coding, source, destination, |
4798 | src_bytes, dst_bytes, 1); | |
4ed46869 KH |
4799 | break; |
4800 | ||
4801 | case coding_type_iso2022: | |
b73bfc1c KH |
4802 | encode_coding_iso2022 (coding, source, destination, |
4803 | src_bytes, dst_bytes); | |
4ed46869 KH |
4804 | break; |
4805 | ||
4806 | case coding_type_big5: | |
b73bfc1c KH |
4807 | encode_coding_sjis_big5 (coding, source, destination, |
4808 | src_bytes, dst_bytes, 0); | |
4809 | break; | |
4810 | ||
4811 | case coding_type_emacs_mule: | |
4812 | encode_coding_emacs_mule (coding, source, destination, | |
4813 | src_bytes, dst_bytes); | |
4ed46869 KH |
4814 | break; |
4815 | ||
4816 | case coding_type_ccl: | |
b73bfc1c KH |
4817 | ccl_coding_driver (coding, source, destination, |
4818 | src_bytes, dst_bytes, 1); | |
d46c5b12 KH |
4819 | break; |
4820 | ||
b73bfc1c KH |
4821 | default: |
4822 | encode_eol (coding, source, destination, src_bytes, dst_bytes); | |
4823 | } | |
4824 | ||
73be902c KH |
4825 | if (coding->mode & CODING_MODE_LAST_BLOCK |
4826 | && coding->result == CODING_FINISH_INSUFFICIENT_SRC) | |
b73bfc1c KH |
4827 | { |
4828 | unsigned char *src = source + coding->consumed; | |
4829 | unsigned char *src_end = src + src_bytes; | |
4830 | unsigned char *dst = destination + coding->produced; | |
4831 | ||
4832 | if (coding->type == coding_type_iso2022) | |
4833 | ENCODE_RESET_PLANE_AND_REGISTER; | |
4834 | if (COMPOSING_P (coding)) | |
4835 | *dst++ = ISO_CODE_ESC, *dst++ = '1'; | |
4836 | if (coding->consumed < src_bytes) | |
d46c5b12 | 4837 | { |
b73bfc1c KH |
4838 | int len = src_bytes - coding->consumed; |
4839 | ||
4840 | BCOPY_SHORT (source + coding->consumed, dst, len); | |
4841 | if (coding->src_multibyte) | |
4842 | len = str_as_unibyte (dst, len); | |
4843 | dst += len; | |
4844 | coding->consumed = src_bytes; | |
d46c5b12 | 4845 | } |
b73bfc1c | 4846 | coding->produced = coding->produced_char = dst - destination; |
73be902c | 4847 | coding->result = CODING_FINISH_NORMAL; |
4ed46869 KH |
4848 | } |
4849 | ||
bb10be8b KH |
4850 | if (coding->result == CODING_FINISH_INSUFFICIENT_SRC |
4851 | && coding->consumed == src_bytes) | |
4852 | coding->result = CODING_FINISH_NORMAL; | |
4853 | ||
b73bfc1c | 4854 | return coding->result; |
4ed46869 KH |
4855 | } |
4856 | ||
fb88bf2d KH |
4857 | /* Scan text in the region between *BEG and *END (byte positions), |
4858 | skip characters which we don't have to decode by coding system | |
4859 | CODING at the head and tail, then set *BEG and *END to the region | |
4860 | of the text we actually have to convert. The caller should move | |
b73bfc1c KH |
4861 | the gap out of the region in advance if the region is from a |
4862 | buffer. | |
4ed46869 | 4863 | |
d46c5b12 KH |
4864 | If STR is not NULL, *BEG and *END are indices into STR. */ |
4865 | ||
4866 | static void | |
4867 | shrink_decoding_region (beg, end, coding, str) | |
4868 | int *beg, *end; | |
4869 | struct coding_system *coding; | |
4870 | unsigned char *str; | |
4871 | { | |
fb88bf2d | 4872 | unsigned char *begp_orig, *begp, *endp_orig, *endp, c; |
d46c5b12 | 4873 | int eol_conversion; |
88993dfd | 4874 | Lisp_Object translation_table; |
d46c5b12 KH |
4875 | |
4876 | if (coding->type == coding_type_ccl | |
4877 | || coding->type == coding_type_undecided | |
b73bfc1c KH |
4878 | || coding->eol_type != CODING_EOL_LF |
4879 | || !NILP (coding->post_read_conversion) | |
4880 | || coding->composing != COMPOSITION_DISABLED) | |
d46c5b12 KH |
4881 | { |
4882 | /* We can't skip any data. */ | |
4883 | return; | |
4884 | } | |
b73bfc1c KH |
4885 | if (coding->type == coding_type_no_conversion |
4886 | || coding->type == coding_type_raw_text | |
4887 | || coding->type == coding_type_emacs_mule) | |
d46c5b12 | 4888 | { |
fb88bf2d KH |
4889 | /* We need no conversion, but don't have to skip any data here. |
4890 | Decoding routine handles them effectively anyway. */ | |
d46c5b12 KH |
4891 | return; |
4892 | } | |
4893 | ||
88993dfd KH |
4894 | translation_table = coding->translation_table_for_decode; |
4895 | if (NILP (translation_table) && !NILP (Venable_character_translation)) | |
4896 | translation_table = Vstandard_translation_table_for_decode; | |
4897 | if (CHAR_TABLE_P (translation_table)) | |
4898 | { | |
4899 | int i; | |
4900 | for (i = 0; i < 128; i++) | |
4901 | if (!NILP (CHAR_TABLE_REF (translation_table, i))) | |
4902 | break; | |
4903 | if (i < 128) | |
fa46990e | 4904 | /* Some ASCII character should be translated. We give up |
88993dfd KH |
4905 | shrinking. */ |
4906 | return; | |
4907 | } | |
4908 | ||
b73bfc1c | 4909 | if (coding->heading_ascii >= 0) |
d46c5b12 KH |
4910 | /* Detection routine has already found how much we can skip at the |
4911 | head. */ | |
4912 | *beg += coding->heading_ascii; | |
4913 | ||
4914 | if (str) | |
4915 | { | |
4916 | begp_orig = begp = str + *beg; | |
4917 | endp_orig = endp = str + *end; | |
4918 | } | |
4919 | else | |
4920 | { | |
fb88bf2d | 4921 | begp_orig = begp = BYTE_POS_ADDR (*beg); |
d46c5b12 KH |
4922 | endp_orig = endp = begp + *end - *beg; |
4923 | } | |
4924 | ||
fa46990e DL |
4925 | eol_conversion = (coding->eol_type == CODING_EOL_CR |
4926 | || coding->eol_type == CODING_EOL_CRLF); | |
4927 | ||
d46c5b12 KH |
4928 | switch (coding->type) |
4929 | { | |
d46c5b12 KH |
4930 | case coding_type_sjis: |
4931 | case coding_type_big5: | |
4932 | /* We can skip all ASCII characters at the head. */ | |
4933 | if (coding->heading_ascii < 0) | |
4934 | { | |
4935 | if (eol_conversion) | |
de9d083c | 4936 | while (begp < endp && *begp < 0x80 && *begp != '\r') begp++; |
d46c5b12 KH |
4937 | else |
4938 | while (begp < endp && *begp < 0x80) begp++; | |
4939 | } | |
4940 | /* We can skip all ASCII characters at the tail except for the | |
4941 | second byte of SJIS or BIG5 code. */ | |
4942 | if (eol_conversion) | |
de9d083c | 4943 | while (begp < endp && endp[-1] < 0x80 && endp[-1] != '\r') endp--; |
d46c5b12 KH |
4944 | else |
4945 | while (begp < endp && endp[-1] < 0x80) endp--; | |
ee59c65f RS |
4946 | /* Do not consider LF as ascii if preceded by CR, since that |
4947 | confuses eol decoding. */ | |
4948 | if (begp < endp && endp < endp_orig && endp[-1] == '\r' && endp[0] == '\n') | |
4949 | endp++; | |
d46c5b12 KH |
4950 | if (begp < endp && endp < endp_orig && endp[-1] >= 0x80) |
4951 | endp++; | |
4952 | break; | |
4953 | ||
b73bfc1c | 4954 | case coding_type_iso2022: |
622fece5 KH |
4955 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, 0) != CHARSET_ASCII) |
4956 | /* We can't skip any data. */ | |
4957 | break; | |
d46c5b12 KH |
4958 | if (coding->heading_ascii < 0) |
4959 | { | |
d46c5b12 KH |
4960 | /* We can skip all ASCII characters at the head except for a |
4961 | few control codes. */ | |
4962 | while (begp < endp && (c = *begp) < 0x80 | |
4963 | && c != ISO_CODE_CR && c != ISO_CODE_SO | |
4964 | && c != ISO_CODE_SI && c != ISO_CODE_ESC | |
4965 | && (!eol_conversion || c != ISO_CODE_LF)) | |
4966 | begp++; | |
4967 | } | |
4968 | switch (coding->category_idx) | |
4969 | { | |
4970 | case CODING_CATEGORY_IDX_ISO_8_1: | |
4971 | case CODING_CATEGORY_IDX_ISO_8_2: | |
4972 | /* We can skip all ASCII characters at the tail. */ | |
4973 | if (eol_conversion) | |
de9d083c | 4974 | while (begp < endp && (c = endp[-1]) < 0x80 && c != '\r') endp--; |
d46c5b12 KH |
4975 | else |
4976 | while (begp < endp && endp[-1] < 0x80) endp--; | |
ee59c65f RS |
4977 | /* Do not consider LF as ascii if preceded by CR, since that |
4978 | confuses eol decoding. */ | |
4979 | if (begp < endp && endp < endp_orig && endp[-1] == '\r' && endp[0] == '\n') | |
4980 | endp++; | |
d46c5b12 KH |
4981 | break; |
4982 | ||
4983 | case CODING_CATEGORY_IDX_ISO_7: | |
4984 | case CODING_CATEGORY_IDX_ISO_7_TIGHT: | |
de79a6a5 | 4985 | { |
8ca3766a | 4986 | /* We can skip all characters at the tail except for 8-bit |
de79a6a5 KH |
4987 | codes and ESC and the following 2-byte at the tail. */ |
4988 | unsigned char *eight_bit = NULL; | |
4989 | ||
4990 | if (eol_conversion) | |
4991 | while (begp < endp | |
4992 | && (c = endp[-1]) != ISO_CODE_ESC && c != '\r') | |
4993 | { | |
4994 | if (!eight_bit && c & 0x80) eight_bit = endp; | |
4995 | endp--; | |
4996 | } | |
4997 | else | |
4998 | while (begp < endp | |
4999 | && (c = endp[-1]) != ISO_CODE_ESC) | |
5000 | { | |
5001 | if (!eight_bit && c & 0x80) eight_bit = endp; | |
5002 | endp--; | |
5003 | } | |
5004 | /* Do not consider LF as ascii if preceded by CR, since that | |
5005 | confuses eol decoding. */ | |
5006 | if (begp < endp && endp < endp_orig | |
5007 | && endp[-1] == '\r' && endp[0] == '\n') | |
5008 | endp++; | |
5009 | if (begp < endp && endp[-1] == ISO_CODE_ESC) | |
5010 | { | |
5011 | if (endp + 1 < endp_orig && end[0] == '(' && end[1] == 'B') | |
5012 | /* This is an ASCII designation sequence. We can | |
5013 | surely skip the tail. But, if we have | |
5014 | encountered an 8-bit code, skip only the codes | |
5015 | after that. */ | |
5016 | endp = eight_bit ? eight_bit : endp + 2; | |
5017 | else | |
5018 | /* Hmmm, we can't skip the tail. */ | |
5019 | endp = endp_orig; | |
5020 | } | |
5021 | else if (eight_bit) | |
5022 | endp = eight_bit; | |
5023 | } | |
d46c5b12 | 5024 | } |
b73bfc1c KH |
5025 | break; |
5026 | ||
5027 | default: | |
5028 | abort (); | |
d46c5b12 KH |
5029 | } |
5030 | *beg += begp - begp_orig; | |
5031 | *end += endp - endp_orig; | |
5032 | return; | |
5033 | } | |
5034 | ||
5035 | /* Like shrink_decoding_region but for encoding. */ | |
5036 | ||
5037 | static void | |
5038 | shrink_encoding_region (beg, end, coding, str) | |
5039 | int *beg, *end; | |
5040 | struct coding_system *coding; | |
5041 | unsigned char *str; | |
5042 | { | |
5043 | unsigned char *begp_orig, *begp, *endp_orig, *endp; | |
5044 | int eol_conversion; | |
88993dfd | 5045 | Lisp_Object translation_table; |
d46c5b12 | 5046 | |
b73bfc1c KH |
5047 | if (coding->type == coding_type_ccl |
5048 | || coding->eol_type == CODING_EOL_CRLF | |
5049 | || coding->eol_type == CODING_EOL_CR | |
5050 | || coding->cmp_data && coding->cmp_data->used > 0) | |
d46c5b12 | 5051 | { |
b73bfc1c KH |
5052 | /* We can't skip any data. */ |
5053 | return; | |
5054 | } | |
5055 | if (coding->type == coding_type_no_conversion | |
5056 | || coding->type == coding_type_raw_text | |
5057 | || coding->type == coding_type_emacs_mule | |
5058 | || coding->type == coding_type_undecided) | |
5059 | { | |
5060 | /* We need no conversion, but don't have to skip any data here. | |
5061 | Encoding routine handles them effectively anyway. */ | |
d46c5b12 KH |
5062 | return; |
5063 | } | |
5064 | ||
88993dfd KH |
5065 | translation_table = coding->translation_table_for_encode; |
5066 | if (NILP (translation_table) && !NILP (Venable_character_translation)) | |
5067 | translation_table = Vstandard_translation_table_for_encode; | |
5068 | if (CHAR_TABLE_P (translation_table)) | |
5069 | { | |
5070 | int i; | |
5071 | for (i = 0; i < 128; i++) | |
5072 | if (!NILP (CHAR_TABLE_REF (translation_table, i))) | |
5073 | break; | |
5074 | if (i < 128) | |
8ca3766a | 5075 | /* Some ASCII character should be translated. We give up |
88993dfd KH |
5076 | shrinking. */ |
5077 | return; | |
5078 | } | |
5079 | ||
d46c5b12 KH |
5080 | if (str) |
5081 | { | |
5082 | begp_orig = begp = str + *beg; | |
5083 | endp_orig = endp = str + *end; | |
5084 | } | |
5085 | else | |
5086 | { | |
fb88bf2d | 5087 | begp_orig = begp = BYTE_POS_ADDR (*beg); |
d46c5b12 KH |
5088 | endp_orig = endp = begp + *end - *beg; |
5089 | } | |
5090 | ||
5091 | eol_conversion = (coding->eol_type == CODING_EOL_CR | |
5092 | || coding->eol_type == CODING_EOL_CRLF); | |
5093 | ||
5094 | /* Here, we don't have to check coding->pre_write_conversion because | |
5095 | the caller is expected to have handled it already. */ | |
5096 | switch (coding->type) | |
5097 | { | |
d46c5b12 | 5098 | case coding_type_iso2022: |
622fece5 KH |
5099 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, 0) != CHARSET_ASCII) |
5100 | /* We can't skip any data. */ | |
5101 | break; | |
d46c5b12 KH |
5102 | if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL) |
5103 | { | |
5104 | unsigned char *bol = begp; | |
5105 | while (begp < endp && *begp < 0x80) | |
5106 | { | |
5107 | begp++; | |
5108 | if (begp[-1] == '\n') | |
5109 | bol = begp; | |
5110 | } | |
5111 | begp = bol; | |
5112 | goto label_skip_tail; | |
5113 | } | |
5114 | /* fall down ... */ | |
5115 | ||
b73bfc1c KH |
5116 | case coding_type_sjis: |
5117 | case coding_type_big5: | |
d46c5b12 KH |
5118 | /* We can skip all ASCII characters at the head and tail. */ |
5119 | if (eol_conversion) | |
5120 | while (begp < endp && *begp < 0x80 && *begp != '\n') begp++; | |
5121 | else | |
5122 | while (begp < endp && *begp < 0x80) begp++; | |
5123 | label_skip_tail: | |
5124 | if (eol_conversion) | |
5125 | while (begp < endp && endp[-1] < 0x80 && endp[-1] != '\n') endp--; | |
5126 | else | |
5127 | while (begp < endp && *(endp - 1) < 0x80) endp--; | |
5128 | break; | |
b73bfc1c KH |
5129 | |
5130 | default: | |
5131 | abort (); | |
d46c5b12 KH |
5132 | } |
5133 | ||
5134 | *beg += begp - begp_orig; | |
5135 | *end += endp - endp_orig; | |
5136 | return; | |
5137 | } | |
5138 | ||
88993dfd KH |
5139 | /* As shrinking conversion region requires some overhead, we don't try |
5140 | shrinking if the length of conversion region is less than this | |
5141 | value. */ | |
5142 | static int shrink_conversion_region_threshhold = 1024; | |
5143 | ||
5144 | #define SHRINK_CONVERSION_REGION(beg, end, coding, str, encodep) \ | |
5145 | do { \ | |
5146 | if (*(end) - *(beg) > shrink_conversion_region_threshhold) \ | |
5147 | { \ | |
5148 | if (encodep) shrink_encoding_region (beg, end, coding, str); \ | |
5149 | else shrink_decoding_region (beg, end, coding, str); \ | |
5150 | } \ | |
5151 | } while (0) | |
5152 | ||
b843d1ae KH |
5153 | static Lisp_Object |
5154 | code_convert_region_unwind (dummy) | |
5155 | Lisp_Object dummy; | |
5156 | { | |
5157 | inhibit_pre_post_conversion = 0; | |
5158 | return Qnil; | |
5159 | } | |
5160 | ||
ec6d2bb8 KH |
5161 | /* Store information about all compositions in the range FROM and TO |
5162 | of OBJ in memory blocks pointed by CODING->cmp_data. OBJ is a | |
5163 | buffer or a string, defaults to the current buffer. */ | |
5164 | ||
5165 | void | |
5166 | coding_save_composition (coding, from, to, obj) | |
5167 | struct coding_system *coding; | |
5168 | int from, to; | |
5169 | Lisp_Object obj; | |
5170 | { | |
5171 | Lisp_Object prop; | |
5172 | int start, end; | |
5173 | ||
91bee881 KH |
5174 | if (coding->composing == COMPOSITION_DISABLED) |
5175 | return; | |
5176 | if (!coding->cmp_data) | |
5177 | coding_allocate_composition_data (coding, from); | |
ec6d2bb8 KH |
5178 | if (!find_composition (from, to, &start, &end, &prop, obj) |
5179 | || end > to) | |
5180 | return; | |
5181 | if (start < from | |
5182 | && (!find_composition (end, to, &start, &end, &prop, obj) | |
5183 | || end > to)) | |
5184 | return; | |
5185 | coding->composing = COMPOSITION_NO; | |
ec6d2bb8 KH |
5186 | do |
5187 | { | |
5188 | if (COMPOSITION_VALID_P (start, end, prop)) | |
5189 | { | |
5190 | enum composition_method method = COMPOSITION_METHOD (prop); | |
5191 | if (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH | |
5192 | >= COMPOSITION_DATA_SIZE) | |
5193 | coding_allocate_composition_data (coding, from); | |
5194 | /* For relative composition, we remember start and end | |
5195 | positions, for the other compositions, we also remember | |
5196 | components. */ | |
5197 | CODING_ADD_COMPOSITION_START (coding, start - from, method); | |
5198 | if (method != COMPOSITION_RELATIVE) | |
5199 | { | |
5200 | /* We must store a*/ | |
5201 | Lisp_Object val, ch; | |
5202 | ||
5203 | val = COMPOSITION_COMPONENTS (prop); | |
5204 | if (CONSP (val)) | |
5205 | while (CONSP (val)) | |
5206 | { | |
5207 | ch = XCAR (val), val = XCDR (val); | |
5208 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (ch)); | |
5209 | } | |
5210 | else if (VECTORP (val) || STRINGP (val)) | |
5211 | { | |
5212 | int len = (VECTORP (val) | |
5213 | ? XVECTOR (val)->size : XSTRING (val)->size); | |
5214 | int i; | |
5215 | for (i = 0; i < len; i++) | |
5216 | { | |
5217 | ch = (STRINGP (val) | |
5218 | ? Faref (val, make_number (i)) | |
5219 | : XVECTOR (val)->contents[i]); | |
5220 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (ch)); | |
5221 | } | |
5222 | } | |
5223 | else /* INTEGERP (val) */ | |
5224 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (val)); | |
5225 | } | |
5226 | CODING_ADD_COMPOSITION_END (coding, end - from); | |
5227 | } | |
5228 | start = end; | |
5229 | } | |
5230 | while (start < to | |
5231 | && find_composition (start, to, &start, &end, &prop, obj) | |
5232 | && end <= to); | |
5233 | ||
5234 | /* Make coding->cmp_data point to the first memory block. */ | |
5235 | while (coding->cmp_data->prev) | |
5236 | coding->cmp_data = coding->cmp_data->prev; | |
5237 | coding->cmp_data_start = 0; | |
5238 | } | |
5239 | ||
5240 | /* Reflect the saved information about compositions to OBJ. | |
8ca3766a | 5241 | CODING->cmp_data points to a memory block for the information. OBJ |
ec6d2bb8 KH |
5242 | is a buffer or a string, defaults to the current buffer. */ |
5243 | ||
33fb63eb | 5244 | void |
ec6d2bb8 KH |
5245 | coding_restore_composition (coding, obj) |
5246 | struct coding_system *coding; | |
5247 | Lisp_Object obj; | |
5248 | { | |
5249 | struct composition_data *cmp_data = coding->cmp_data; | |
5250 | ||
5251 | if (!cmp_data) | |
5252 | return; | |
5253 | ||
5254 | while (cmp_data->prev) | |
5255 | cmp_data = cmp_data->prev; | |
5256 | ||
5257 | while (cmp_data) | |
5258 | { | |
5259 | int i; | |
5260 | ||
78108bcd KH |
5261 | for (i = 0; i < cmp_data->used && cmp_data->data[i] > 0; |
5262 | i += cmp_data->data[i]) | |
ec6d2bb8 KH |
5263 | { |
5264 | int *data = cmp_data->data + i; | |
5265 | enum composition_method method = (enum composition_method) data[3]; | |
5266 | Lisp_Object components; | |
5267 | ||
5268 | if (method == COMPOSITION_RELATIVE) | |
5269 | components = Qnil; | |
5270 | else | |
5271 | { | |
5272 | int len = data[0] - 4, j; | |
5273 | Lisp_Object args[MAX_COMPOSITION_COMPONENTS * 2 - 1]; | |
5274 | ||
5275 | for (j = 0; j < len; j++) | |
5276 | args[j] = make_number (data[4 + j]); | |
5277 | components = (method == COMPOSITION_WITH_ALTCHARS | |
5278 | ? Fstring (len, args) : Fvector (len, args)); | |
5279 | } | |
5280 | compose_text (data[1], data[2], components, Qnil, obj); | |
5281 | } | |
5282 | cmp_data = cmp_data->next; | |
5283 | } | |
5284 | } | |
5285 | ||
d46c5b12 | 5286 | /* Decode (if ENCODEP is zero) or encode (if ENCODEP is nonzero) the |
fb88bf2d KH |
5287 | text from FROM to TO (byte positions are FROM_BYTE and TO_BYTE) by |
5288 | coding system CODING, and return the status code of code conversion | |
5289 | (currently, this value has no meaning). | |
5290 | ||
5291 | How many characters (and bytes) are converted to how many | |
5292 | characters (and bytes) are recorded in members of the structure | |
5293 | CODING. | |
d46c5b12 | 5294 | |
6e44253b | 5295 | If REPLACE is nonzero, we do various things as if the original text |
d46c5b12 | 5296 | is deleted and a new text is inserted. See the comments in |
b73bfc1c KH |
5297 | replace_range (insdel.c) to know what we are doing. |
5298 | ||
5299 | If REPLACE is zero, it is assumed that the source text is unibyte. | |
8ca3766a | 5300 | Otherwise, it is assumed that the source text is multibyte. */ |
4ed46869 KH |
5301 | |
5302 | int | |
6e44253b KH |
5303 | code_convert_region (from, from_byte, to, to_byte, coding, encodep, replace) |
5304 | int from, from_byte, to, to_byte, encodep, replace; | |
4ed46869 | 5305 | struct coding_system *coding; |
4ed46869 | 5306 | { |
fb88bf2d KH |
5307 | int len = to - from, len_byte = to_byte - from_byte; |
5308 | int require, inserted, inserted_byte; | |
4b39528c | 5309 | int head_skip, tail_skip, total_skip = 0; |
84d60297 | 5310 | Lisp_Object saved_coding_symbol; |
fb88bf2d | 5311 | int first = 1; |
fb88bf2d | 5312 | unsigned char *src, *dst; |
84d60297 | 5313 | Lisp_Object deletion; |
e133c8fa | 5314 | int orig_point = PT, orig_len = len; |
6abb9bd9 | 5315 | int prev_Z; |
b73bfc1c KH |
5316 | int multibyte_p = !NILP (current_buffer->enable_multibyte_characters); |
5317 | ||
84d60297 | 5318 | deletion = Qnil; |
8844fa83 | 5319 | saved_coding_symbol = coding->symbol; |
d46c5b12 | 5320 | |
83fa074f | 5321 | if (from < PT && PT < to) |
e133c8fa KH |
5322 | { |
5323 | TEMP_SET_PT_BOTH (from, from_byte); | |
5324 | orig_point = from; | |
5325 | } | |
83fa074f | 5326 | |
6e44253b | 5327 | if (replace) |
d46c5b12 | 5328 | { |
fb88bf2d | 5329 | int saved_from = from; |
e077cc80 | 5330 | int saved_inhibit_modification_hooks; |
fb88bf2d | 5331 | |
d46c5b12 | 5332 | prepare_to_modify_buffer (from, to, &from); |
fb88bf2d KH |
5333 | if (saved_from != from) |
5334 | { | |
5335 | to = from + len; | |
b73bfc1c | 5336 | from_byte = CHAR_TO_BYTE (from), to_byte = CHAR_TO_BYTE (to); |
fb88bf2d KH |
5337 | len_byte = to_byte - from_byte; |
5338 | } | |
e077cc80 KH |
5339 | |
5340 | /* The code conversion routine can not preserve text properties | |
5341 | for now. So, we must remove all text properties in the | |
5342 | region. Here, we must suppress all modification hooks. */ | |
5343 | saved_inhibit_modification_hooks = inhibit_modification_hooks; | |
5344 | inhibit_modification_hooks = 1; | |
5345 | Fset_text_properties (make_number (from), make_number (to), Qnil, Qnil); | |
5346 | inhibit_modification_hooks = saved_inhibit_modification_hooks; | |
d46c5b12 | 5347 | } |
d46c5b12 KH |
5348 | |
5349 | if (! encodep && CODING_REQUIRE_DETECTION (coding)) | |
5350 | { | |
12410ef1 | 5351 | /* We must detect encoding of text and eol format. */ |
d46c5b12 KH |
5352 | |
5353 | if (from < GPT && to > GPT) | |
5354 | move_gap_both (from, from_byte); | |
5355 | if (coding->type == coding_type_undecided) | |
5356 | { | |
fb88bf2d | 5357 | detect_coding (coding, BYTE_POS_ADDR (from_byte), len_byte); |
d46c5b12 | 5358 | if (coding->type == coding_type_undecided) |
62b3ef1d KH |
5359 | { |
5360 | /* It seems that the text contains only ASCII, but we | |
d9aef30f | 5361 | should not leave it undecided because the deeper |
62b3ef1d KH |
5362 | decoding routine (decode_coding) tries to detect the |
5363 | encodings again in vain. */ | |
5364 | coding->type = coding_type_emacs_mule; | |
5365 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
d280ccb6 KH |
5366 | /* As emacs-mule decoder will handle composition, we |
5367 | need this setting to allocate coding->cmp_data | |
5368 | later. */ | |
5369 | coding->composing = COMPOSITION_NO; | |
62b3ef1d | 5370 | } |
d46c5b12 | 5371 | } |
aaaf0b1e KH |
5372 | if (coding->eol_type == CODING_EOL_UNDECIDED |
5373 | && coding->type != coding_type_ccl) | |
d46c5b12 | 5374 | { |
d46c5b12 KH |
5375 | detect_eol (coding, BYTE_POS_ADDR (from_byte), len_byte); |
5376 | if (coding->eol_type == CODING_EOL_UNDECIDED) | |
5377 | coding->eol_type = CODING_EOL_LF; | |
5378 | /* We had better recover the original eol format if we | |
8ca3766a | 5379 | encounter an inconsistent eol format while decoding. */ |
d46c5b12 KH |
5380 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
5381 | } | |
5382 | } | |
5383 | ||
d46c5b12 KH |
5384 | /* Now we convert the text. */ |
5385 | ||
5386 | /* For encoding, we must process pre-write-conversion in advance. */ | |
b73bfc1c KH |
5387 | if (! inhibit_pre_post_conversion |
5388 | && encodep | |
d46c5b12 KH |
5389 | && SYMBOLP (coding->pre_write_conversion) |
5390 | && ! NILP (Ffboundp (coding->pre_write_conversion))) | |
5391 | { | |
2b4f9037 KH |
5392 | /* The function in pre-write-conversion may put a new text in a |
5393 | new buffer. */ | |
0007bdd0 KH |
5394 | struct buffer *prev = current_buffer; |
5395 | Lisp_Object new; | |
b843d1ae | 5396 | int count = specpdl_ptr - specpdl; |
d46c5b12 | 5397 | |
b843d1ae KH |
5398 | record_unwind_protect (code_convert_region_unwind, Qnil); |
5399 | /* We should not call any more pre-write/post-read-conversion | |
5400 | functions while this pre-write-conversion is running. */ | |
5401 | inhibit_pre_post_conversion = 1; | |
b39f748c AS |
5402 | call2 (coding->pre_write_conversion, |
5403 | make_number (from), make_number (to)); | |
b843d1ae KH |
5404 | inhibit_pre_post_conversion = 0; |
5405 | /* Discard the unwind protect. */ | |
5406 | specpdl_ptr--; | |
5407 | ||
d46c5b12 KH |
5408 | if (current_buffer != prev) |
5409 | { | |
5410 | len = ZV - BEGV; | |
0007bdd0 | 5411 | new = Fcurrent_buffer (); |
d46c5b12 | 5412 | set_buffer_internal_1 (prev); |
7dae4502 | 5413 | del_range_2 (from, from_byte, to, to_byte, 0); |
e133c8fa | 5414 | TEMP_SET_PT_BOTH (from, from_byte); |
0007bdd0 KH |
5415 | insert_from_buffer (XBUFFER (new), 1, len, 0); |
5416 | Fkill_buffer (new); | |
e133c8fa KH |
5417 | if (orig_point >= to) |
5418 | orig_point += len - orig_len; | |
5419 | else if (orig_point > from) | |
5420 | orig_point = from; | |
5421 | orig_len = len; | |
d46c5b12 | 5422 | to = from + len; |
b73bfc1c KH |
5423 | from_byte = CHAR_TO_BYTE (from); |
5424 | to_byte = CHAR_TO_BYTE (to); | |
d46c5b12 | 5425 | len_byte = to_byte - from_byte; |
e133c8fa | 5426 | TEMP_SET_PT_BOTH (from, from_byte); |
d46c5b12 KH |
5427 | } |
5428 | } | |
5429 | ||
12410ef1 KH |
5430 | if (replace) |
5431 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); | |
5432 | ||
ec6d2bb8 KH |
5433 | if (coding->composing != COMPOSITION_DISABLED) |
5434 | { | |
5435 | if (encodep) | |
5436 | coding_save_composition (coding, from, to, Fcurrent_buffer ()); | |
5437 | else | |
5438 | coding_allocate_composition_data (coding, from); | |
5439 | } | |
fb88bf2d | 5440 | |
b73bfc1c | 5441 | /* Try to skip the heading and tailing ASCIIs. */ |
4956c225 KH |
5442 | if (coding->type != coding_type_ccl) |
5443 | { | |
5444 | int from_byte_orig = from_byte, to_byte_orig = to_byte; | |
ec6d2bb8 | 5445 | |
4956c225 KH |
5446 | if (from < GPT && GPT < to) |
5447 | move_gap_both (from, from_byte); | |
5448 | SHRINK_CONVERSION_REGION (&from_byte, &to_byte, coding, NULL, encodep); | |
5449 | if (from_byte == to_byte | |
5450 | && (encodep || NILP (coding->post_read_conversion)) | |
5451 | && ! CODING_REQUIRE_FLUSHING (coding)) | |
5452 | { | |
5453 | coding->produced = len_byte; | |
5454 | coding->produced_char = len; | |
5455 | if (!replace) | |
5456 | /* We must record and adjust for this new text now. */ | |
5457 | adjust_after_insert (from, from_byte_orig, to, to_byte_orig, len); | |
5458 | return 0; | |
5459 | } | |
5460 | ||
5461 | head_skip = from_byte - from_byte_orig; | |
5462 | tail_skip = to_byte_orig - to_byte; | |
5463 | total_skip = head_skip + tail_skip; | |
5464 | from += head_skip; | |
5465 | to -= tail_skip; | |
5466 | len -= total_skip; len_byte -= total_skip; | |
5467 | } | |
d46c5b12 | 5468 | |
8ca3766a | 5469 | /* For conversion, we must put the gap before the text in addition to |
fb88bf2d KH |
5470 | making the gap larger for efficient decoding. The required gap |
5471 | size starts from 2000 which is the magic number used in make_gap. | |
5472 | But, after one batch of conversion, it will be incremented if we | |
5473 | find that it is not enough . */ | |
d46c5b12 KH |
5474 | require = 2000; |
5475 | ||
5476 | if (GAP_SIZE < require) | |
5477 | make_gap (require - GAP_SIZE); | |
5478 | move_gap_both (from, from_byte); | |
5479 | ||
d46c5b12 | 5480 | inserted = inserted_byte = 0; |
fb88bf2d KH |
5481 | |
5482 | GAP_SIZE += len_byte; | |
5483 | ZV -= len; | |
5484 | Z -= len; | |
5485 | ZV_BYTE -= len_byte; | |
5486 | Z_BYTE -= len_byte; | |
5487 | ||
d9f9a1bc GM |
5488 | if (GPT - BEG < BEG_UNCHANGED) |
5489 | BEG_UNCHANGED = GPT - BEG; | |
5490 | if (Z - GPT < END_UNCHANGED) | |
5491 | END_UNCHANGED = Z - GPT; | |
f2558efd | 5492 | |
b73bfc1c KH |
5493 | if (!encodep && coding->src_multibyte) |
5494 | { | |
5495 | /* Decoding routines expects that the source text is unibyte. | |
5496 | We must convert 8-bit characters of multibyte form to | |
5497 | unibyte. */ | |
5498 | int len_byte_orig = len_byte; | |
5499 | len_byte = str_as_unibyte (GAP_END_ADDR - len_byte, len_byte); | |
5500 | if (len_byte < len_byte_orig) | |
5501 | safe_bcopy (GAP_END_ADDR - len_byte_orig, GAP_END_ADDR - len_byte, | |
5502 | len_byte); | |
5503 | coding->src_multibyte = 0; | |
5504 | } | |
5505 | ||
d46c5b12 KH |
5506 | for (;;) |
5507 | { | |
fb88bf2d | 5508 | int result; |
d46c5b12 | 5509 | |
ec6d2bb8 | 5510 | /* The buffer memory is now: |
b73bfc1c KH |
5511 | +--------+converted-text+---------+-------original-text-------+---+ |
5512 | |<-from->|<--inserted-->|---------|<--------len_byte--------->|---| | |
5513 | |<---------------------- GAP ----------------------->| */ | |
ec6d2bb8 KH |
5514 | src = GAP_END_ADDR - len_byte; |
5515 | dst = GPT_ADDR + inserted_byte; | |
5516 | ||
d46c5b12 | 5517 | if (encodep) |
fb88bf2d | 5518 | result = encode_coding (coding, src, dst, len_byte, 0); |
d46c5b12 | 5519 | else |
fb88bf2d | 5520 | result = decode_coding (coding, src, dst, len_byte, 0); |
ec6d2bb8 KH |
5521 | |
5522 | /* The buffer memory is now: | |
b73bfc1c KH |
5523 | +--------+-------converted-text----+--+------original-text----+---+ |
5524 | |<-from->|<-inserted->|<-produced->|--|<-(len_byte-consumed)->|---| | |
5525 | |<---------------------- GAP ----------------------->| */ | |
ec6d2bb8 | 5526 | |
d46c5b12 KH |
5527 | inserted += coding->produced_char; |
5528 | inserted_byte += coding->produced; | |
d46c5b12 | 5529 | len_byte -= coding->consumed; |
ec6d2bb8 KH |
5530 | |
5531 | if (result == CODING_FINISH_INSUFFICIENT_CMP) | |
5532 | { | |
5533 | coding_allocate_composition_data (coding, from + inserted); | |
5534 | continue; | |
5535 | } | |
5536 | ||
fb88bf2d | 5537 | src += coding->consumed; |
3636f7a3 | 5538 | dst += coding->produced; |
d46c5b12 | 5539 | |
9864ebce KH |
5540 | if (result == CODING_FINISH_NORMAL) |
5541 | { | |
5542 | src += len_byte; | |
5543 | break; | |
5544 | } | |
d46c5b12 KH |
5545 | if (! encodep && result == CODING_FINISH_INCONSISTENT_EOL) |
5546 | { | |
fb88bf2d | 5547 | unsigned char *pend = dst, *p = pend - inserted_byte; |
38edf7d4 | 5548 | Lisp_Object eol_type; |
d46c5b12 KH |
5549 | |
5550 | /* Encode LFs back to the original eol format (CR or CRLF). */ | |
5551 | if (coding->eol_type == CODING_EOL_CR) | |
5552 | { | |
5553 | while (p < pend) if (*p++ == '\n') p[-1] = '\r'; | |
5554 | } | |
5555 | else | |
5556 | { | |
d46c5b12 KH |
5557 | int count = 0; |
5558 | ||
fb88bf2d KH |
5559 | while (p < pend) if (*p++ == '\n') count++; |
5560 | if (src - dst < count) | |
d46c5b12 | 5561 | { |
38edf7d4 | 5562 | /* We don't have sufficient room for encoding LFs |
fb88bf2d KH |
5563 | back to CRLF. We must record converted and |
5564 | not-yet-converted text back to the buffer | |
5565 | content, enlarge the gap, then record them out of | |
5566 | the buffer contents again. */ | |
5567 | int add = len_byte + inserted_byte; | |
5568 | ||
5569 | GAP_SIZE -= add; | |
5570 | ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
5571 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5572 | make_gap (count - GAP_SIZE); | |
5573 | GAP_SIZE += add; | |
5574 | ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
5575 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
5576 | /* Don't forget to update SRC, DST, and PEND. */ | |
5577 | src = GAP_END_ADDR - len_byte; | |
5578 | dst = GPT_ADDR + inserted_byte; | |
5579 | pend = dst; | |
d46c5b12 | 5580 | } |
d46c5b12 KH |
5581 | inserted += count; |
5582 | inserted_byte += count; | |
fb88bf2d KH |
5583 | coding->produced += count; |
5584 | p = dst = pend + count; | |
5585 | while (count) | |
5586 | { | |
5587 | *--p = *--pend; | |
5588 | if (*p == '\n') count--, *--p = '\r'; | |
5589 | } | |
d46c5b12 KH |
5590 | } |
5591 | ||
5592 | /* Suppress eol-format conversion in the further conversion. */ | |
5593 | coding->eol_type = CODING_EOL_LF; | |
5594 | ||
38edf7d4 KH |
5595 | /* Set the coding system symbol to that for Unix-like EOL. */ |
5596 | eol_type = Fget (saved_coding_symbol, Qeol_type); | |
5597 | if (VECTORP (eol_type) | |
5598 | && XVECTOR (eol_type)->size == 3 | |
5599 | && SYMBOLP (XVECTOR (eol_type)->contents[CODING_EOL_LF])) | |
5600 | coding->symbol = XVECTOR (eol_type)->contents[CODING_EOL_LF]; | |
5601 | else | |
5602 | coding->symbol = saved_coding_symbol; | |
fb88bf2d KH |
5603 | |
5604 | continue; | |
d46c5b12 KH |
5605 | } |
5606 | if (len_byte <= 0) | |
944bd420 KH |
5607 | { |
5608 | if (coding->type != coding_type_ccl | |
5609 | || coding->mode & CODING_MODE_LAST_BLOCK) | |
5610 | break; | |
5611 | coding->mode |= CODING_MODE_LAST_BLOCK; | |
5612 | continue; | |
5613 | } | |
d46c5b12 KH |
5614 | if (result == CODING_FINISH_INSUFFICIENT_SRC) |
5615 | { | |
5616 | /* The source text ends in invalid codes. Let's just | |
5617 | make them valid buffer contents, and finish conversion. */ | |
fb88bf2d | 5618 | inserted += len_byte; |
d46c5b12 | 5619 | inserted_byte += len_byte; |
fb88bf2d | 5620 | while (len_byte--) |
ee59c65f | 5621 | *dst++ = *src++; |
d46c5b12 KH |
5622 | break; |
5623 | } | |
9864ebce KH |
5624 | if (result == CODING_FINISH_INTERRUPT) |
5625 | { | |
5626 | /* The conversion procedure was interrupted by a user. */ | |
9864ebce KH |
5627 | break; |
5628 | } | |
5629 | /* Now RESULT == CODING_FINISH_INSUFFICIENT_DST */ | |
5630 | if (coding->consumed < 1) | |
5631 | { | |
5632 | /* It's quite strange to require more memory without | |
5633 | consuming any bytes. Perhaps CCL program bug. */ | |
9864ebce KH |
5634 | break; |
5635 | } | |
fb88bf2d KH |
5636 | if (first) |
5637 | { | |
5638 | /* We have just done the first batch of conversion which was | |
8ca3766a | 5639 | stopped because of insufficient gap. Let's reconsider the |
fb88bf2d KH |
5640 | required gap size (i.e. SRT - DST) now. |
5641 | ||
5642 | We have converted ORIG bytes (== coding->consumed) into | |
5643 | NEW bytes (coding->produced). To convert the remaining | |
5644 | LEN bytes, we may need REQUIRE bytes of gap, where: | |
5645 | REQUIRE + LEN_BYTE = LEN_BYTE * (NEW / ORIG) | |
5646 | REQUIRE = LEN_BYTE * (NEW - ORIG) / ORIG | |
5647 | Here, we are sure that NEW >= ORIG. */ | |
6e44253b KH |
5648 | float ratio = coding->produced - coding->consumed; |
5649 | ratio /= coding->consumed; | |
5650 | require = len_byte * ratio; | |
fb88bf2d KH |
5651 | first = 0; |
5652 | } | |
5653 | if ((src - dst) < (require + 2000)) | |
5654 | { | |
5655 | /* See the comment above the previous call of make_gap. */ | |
5656 | int add = len_byte + inserted_byte; | |
5657 | ||
5658 | GAP_SIZE -= add; | |
5659 | ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
5660 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5661 | make_gap (require + 2000); | |
5662 | GAP_SIZE += add; | |
5663 | ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
5664 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
fb88bf2d | 5665 | } |
d46c5b12 | 5666 | } |
fb88bf2d KH |
5667 | if (src - dst > 0) *dst = 0; /* Put an anchor. */ |
5668 | ||
b73bfc1c KH |
5669 | if (encodep && coding->dst_multibyte) |
5670 | { | |
5671 | /* The output is unibyte. We must convert 8-bit characters to | |
5672 | multibyte form. */ | |
5673 | if (inserted_byte * 2 > GAP_SIZE) | |
5674 | { | |
5675 | GAP_SIZE -= inserted_byte; | |
5676 | ZV += inserted_byte; Z += inserted_byte; | |
5677 | ZV_BYTE += inserted_byte; Z_BYTE += inserted_byte; | |
5678 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5679 | make_gap (inserted_byte - GAP_SIZE); | |
5680 | GAP_SIZE += inserted_byte; | |
5681 | ZV -= inserted_byte; Z -= inserted_byte; | |
5682 | ZV_BYTE -= inserted_byte; Z_BYTE -= inserted_byte; | |
5683 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
5684 | } | |
5685 | inserted_byte = str_to_multibyte (GPT_ADDR, GAP_SIZE, inserted_byte); | |
5686 | } | |
7553d0e1 | 5687 | |
8ca3766a | 5688 | /* If we shrank the conversion area, adjust it now. */ |
12410ef1 KH |
5689 | if (total_skip > 0) |
5690 | { | |
5691 | if (tail_skip > 0) | |
5692 | safe_bcopy (GAP_END_ADDR, GPT_ADDR + inserted_byte, tail_skip); | |
5693 | inserted += total_skip; inserted_byte += total_skip; | |
5694 | GAP_SIZE += total_skip; | |
5695 | GPT -= head_skip; GPT_BYTE -= head_skip; | |
5696 | ZV -= total_skip; ZV_BYTE -= total_skip; | |
5697 | Z -= total_skip; Z_BYTE -= total_skip; | |
5698 | from -= head_skip; from_byte -= head_skip; | |
5699 | to += tail_skip; to_byte += tail_skip; | |
5700 | } | |
5701 | ||
6abb9bd9 | 5702 | prev_Z = Z; |
12410ef1 | 5703 | adjust_after_replace (from, from_byte, deletion, inserted, inserted_byte); |
6abb9bd9 | 5704 | inserted = Z - prev_Z; |
4ed46869 | 5705 | |
ec6d2bb8 KH |
5706 | if (!encodep && coding->cmp_data && coding->cmp_data->used) |
5707 | coding_restore_composition (coding, Fcurrent_buffer ()); | |
5708 | coding_free_composition_data (coding); | |
5709 | ||
b73bfc1c KH |
5710 | if (! inhibit_pre_post_conversion |
5711 | && ! encodep && ! NILP (coding->post_read_conversion)) | |
d46c5b12 | 5712 | { |
2b4f9037 | 5713 | Lisp_Object val; |
b843d1ae | 5714 | int count = specpdl_ptr - specpdl; |
4ed46869 | 5715 | |
e133c8fa KH |
5716 | if (from != PT) |
5717 | TEMP_SET_PT_BOTH (from, from_byte); | |
6abb9bd9 | 5718 | prev_Z = Z; |
b843d1ae KH |
5719 | record_unwind_protect (code_convert_region_unwind, Qnil); |
5720 | /* We should not call any more pre-write/post-read-conversion | |
5721 | functions while this post-read-conversion is running. */ | |
5722 | inhibit_pre_post_conversion = 1; | |
2b4f9037 | 5723 | val = call1 (coding->post_read_conversion, make_number (inserted)); |
b843d1ae KH |
5724 | inhibit_pre_post_conversion = 0; |
5725 | /* Discard the unwind protect. */ | |
5726 | specpdl_ptr--; | |
6abb9bd9 | 5727 | CHECK_NUMBER (val, 0); |
944bd420 | 5728 | inserted += Z - prev_Z; |
e133c8fa KH |
5729 | } |
5730 | ||
5731 | if (orig_point >= from) | |
5732 | { | |
5733 | if (orig_point >= from + orig_len) | |
5734 | orig_point += inserted - orig_len; | |
5735 | else | |
5736 | orig_point = from; | |
5737 | TEMP_SET_PT (orig_point); | |
d46c5b12 | 5738 | } |
4ed46869 | 5739 | |
ec6d2bb8 KH |
5740 | if (replace) |
5741 | { | |
5742 | signal_after_change (from, to - from, inserted); | |
e19539f1 | 5743 | update_compositions (from, from + inserted, CHECK_BORDER); |
ec6d2bb8 | 5744 | } |
2b4f9037 | 5745 | |
fb88bf2d | 5746 | { |
12410ef1 KH |
5747 | coding->consumed = to_byte - from_byte; |
5748 | coding->consumed_char = to - from; | |
5749 | coding->produced = inserted_byte; | |
5750 | coding->produced_char = inserted; | |
fb88bf2d | 5751 | } |
7553d0e1 | 5752 | |
fb88bf2d | 5753 | return 0; |
d46c5b12 KH |
5754 | } |
5755 | ||
5756 | Lisp_Object | |
b73bfc1c KH |
5757 | run_pre_post_conversion_on_str (str, coding, encodep) |
5758 | Lisp_Object str; | |
5759 | struct coding_system *coding; | |
5760 | int encodep; | |
5761 | { | |
5762 | int count = specpdl_ptr - specpdl; | |
5763 | struct gcpro gcpro1; | |
b73bfc1c KH |
5764 | int multibyte = STRING_MULTIBYTE (str); |
5765 | ||
5766 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
5767 | record_unwind_protect (code_convert_region_unwind, Qnil); | |
5768 | GCPRO1 (str); | |
5769 | temp_output_buffer_setup (" *code-converting-work*"); | |
5770 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
5771 | /* We must insert the contents of STR as is without | |
5772 | unibyte<->multibyte conversion. For that, we adjust the | |
5773 | multibyteness of the working buffer to that of STR. */ | |
5774 | Ferase_buffer (); | |
5775 | current_buffer->enable_multibyte_characters = multibyte ? Qt : Qnil; | |
5776 | insert_from_string (str, 0, 0, | |
5777 | XSTRING (str)->size, STRING_BYTES (XSTRING (str)), 0); | |
5778 | UNGCPRO; | |
5779 | inhibit_pre_post_conversion = 1; | |
5780 | if (encodep) | |
5781 | call2 (coding->pre_write_conversion, make_number (BEG), make_number (Z)); | |
5782 | else | |
6bac5b12 KH |
5783 | { |
5784 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
5785 | call1 (coding->post_read_conversion, make_number (Z - BEG)); | |
5786 | } | |
b73bfc1c | 5787 | inhibit_pre_post_conversion = 0; |
78108bcd | 5788 | str = make_buffer_string (BEG, Z, 1); |
b73bfc1c KH |
5789 | return unbind_to (count, str); |
5790 | } | |
5791 | ||
5792 | Lisp_Object | |
5793 | decode_coding_string (str, coding, nocopy) | |
d46c5b12 | 5794 | Lisp_Object str; |
4ed46869 | 5795 | struct coding_system *coding; |
b73bfc1c | 5796 | int nocopy; |
4ed46869 | 5797 | { |
d46c5b12 | 5798 | int len; |
73be902c | 5799 | struct conversion_buffer buf; |
da55a2b7 | 5800 | int from, to_byte; |
d46c5b12 | 5801 | struct gcpro gcpro1; |
84d60297 | 5802 | Lisp_Object saved_coding_symbol; |
d46c5b12 | 5803 | int result; |
78108bcd | 5804 | int require_decoding; |
73be902c KH |
5805 | int shrinked_bytes = 0; |
5806 | Lisp_Object newstr; | |
2391eaa4 | 5807 | int consumed, consumed_char, produced, produced_char; |
4ed46869 | 5808 | |
b73bfc1c | 5809 | from = 0; |
b73bfc1c | 5810 | to_byte = STRING_BYTES (XSTRING (str)); |
4ed46869 | 5811 | |
8844fa83 | 5812 | saved_coding_symbol = coding->symbol; |
764ca8da KH |
5813 | coding->src_multibyte = STRING_MULTIBYTE (str); |
5814 | coding->dst_multibyte = 1; | |
b73bfc1c | 5815 | if (CODING_REQUIRE_DETECTION (coding)) |
d46c5b12 KH |
5816 | { |
5817 | /* See the comments in code_convert_region. */ | |
5818 | if (coding->type == coding_type_undecided) | |
5819 | { | |
5820 | detect_coding (coding, XSTRING (str)->data, to_byte); | |
5821 | if (coding->type == coding_type_undecided) | |
d280ccb6 KH |
5822 | { |
5823 | coding->type = coding_type_emacs_mule; | |
5824 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
5825 | /* As emacs-mule decoder will handle composition, we | |
5826 | need this setting to allocate coding->cmp_data | |
5827 | later. */ | |
5828 | coding->composing = COMPOSITION_NO; | |
5829 | } | |
d46c5b12 | 5830 | } |
aaaf0b1e KH |
5831 | if (coding->eol_type == CODING_EOL_UNDECIDED |
5832 | && coding->type != coding_type_ccl) | |
d46c5b12 KH |
5833 | { |
5834 | saved_coding_symbol = coding->symbol; | |
5835 | detect_eol (coding, XSTRING (str)->data, to_byte); | |
5836 | if (coding->eol_type == CODING_EOL_UNDECIDED) | |
5837 | coding->eol_type = CODING_EOL_LF; | |
5838 | /* We had better recover the original eol format if we | |
8ca3766a | 5839 | encounter an inconsistent eol format while decoding. */ |
d46c5b12 KH |
5840 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
5841 | } | |
5842 | } | |
4ed46869 | 5843 | |
764ca8da KH |
5844 | if (coding->type == coding_type_no_conversion |
5845 | || coding->type == coding_type_raw_text) | |
5846 | coding->dst_multibyte = 0; | |
5847 | ||
78108bcd | 5848 | require_decoding = CODING_REQUIRE_DECODING (coding); |
ec6d2bb8 | 5849 | |
b73bfc1c | 5850 | if (STRING_MULTIBYTE (str)) |
d46c5b12 | 5851 | { |
b73bfc1c KH |
5852 | /* Decoding routines expect the source text to be unibyte. */ |
5853 | str = Fstring_as_unibyte (str); | |
86af83a9 | 5854 | to_byte = STRING_BYTES (XSTRING (str)); |
b73bfc1c | 5855 | nocopy = 1; |
764ca8da | 5856 | coding->src_multibyte = 0; |
b73bfc1c | 5857 | } |
ec6d2bb8 | 5858 | |
b73bfc1c | 5859 | /* Try to skip the heading and tailing ASCIIs. */ |
78108bcd | 5860 | if (require_decoding && coding->type != coding_type_ccl) |
4956c225 | 5861 | { |
4956c225 KH |
5862 | SHRINK_CONVERSION_REGION (&from, &to_byte, coding, XSTRING (str)->data, |
5863 | 0); | |
5864 | if (from == to_byte) | |
78108bcd | 5865 | require_decoding = 0; |
73be902c | 5866 | shrinked_bytes = from + (STRING_BYTES (XSTRING (str)) - to_byte); |
4956c225 | 5867 | } |
b73bfc1c | 5868 | |
78108bcd KH |
5869 | if (!require_decoding) |
5870 | { | |
5871 | coding->consumed = STRING_BYTES (XSTRING (str)); | |
5872 | coding->consumed_char = XSTRING (str)->size; | |
5873 | if (coding->dst_multibyte) | |
5874 | { | |
5875 | str = Fstring_as_multibyte (str); | |
5876 | nocopy = 1; | |
5877 | } | |
5878 | coding->produced = STRING_BYTES (XSTRING (str)); | |
5879 | coding->produced_char = XSTRING (str)->size; | |
5880 | return (nocopy ? str : Fcopy_sequence (str)); | |
5881 | } | |
5882 | ||
5883 | if (coding->composing != COMPOSITION_DISABLED) | |
5884 | coding_allocate_composition_data (coding, from); | |
b73bfc1c | 5885 | len = decoding_buffer_size (coding, to_byte - from); |
73be902c | 5886 | allocate_conversion_buffer (buf, len); |
4ed46869 | 5887 | |
2391eaa4 | 5888 | consumed = consumed_char = produced = produced_char = 0; |
73be902c | 5889 | while (1) |
4ed46869 | 5890 | { |
73be902c KH |
5891 | result = decode_coding (coding, XSTRING (str)->data + from + consumed, |
5892 | buf.data + produced, to_byte - from - consumed, | |
5893 | buf.size - produced); | |
5894 | consumed += coding->consumed; | |
2391eaa4 | 5895 | consumed_char += coding->consumed_char; |
73be902c KH |
5896 | produced += coding->produced; |
5897 | produced_char += coding->produced_char; | |
2391eaa4 KH |
5898 | if (result == CODING_FINISH_NORMAL |
5899 | || (result == CODING_FINISH_INSUFFICIENT_SRC | |
5900 | && coding->consumed == 0)) | |
73be902c KH |
5901 | break; |
5902 | if (result == CODING_FINISH_INSUFFICIENT_CMP) | |
5903 | coding_allocate_composition_data (coding, from + produced_char); | |
5904 | else if (result == CODING_FINISH_INSUFFICIENT_DST) | |
5905 | extend_conversion_buffer (&buf); | |
5906 | else if (result == CODING_FINISH_INCONSISTENT_EOL) | |
5907 | { | |
8844fa83 KH |
5908 | Lisp_Object eol_type; |
5909 | ||
73be902c KH |
5910 | /* Recover the original EOL format. */ |
5911 | if (coding->eol_type == CODING_EOL_CR) | |
5912 | { | |
5913 | unsigned char *p; | |
5914 | for (p = buf.data; p < buf.data + produced; p++) | |
5915 | if (*p == '\n') *p = '\r'; | |
5916 | } | |
5917 | else if (coding->eol_type == CODING_EOL_CRLF) | |
5918 | { | |
5919 | int num_eol = 0; | |
5920 | unsigned char *p0, *p1; | |
5921 | for (p0 = buf.data, p1 = p0 + produced; p0 < p1; p0++) | |
5922 | if (*p0 == '\n') num_eol++; | |
5923 | if (produced + num_eol >= buf.size) | |
5924 | extend_conversion_buffer (&buf); | |
5925 | for (p0 = buf.data + produced, p1 = p0 + num_eol; p0 > buf.data;) | |
5926 | { | |
5927 | *--p1 = *--p0; | |
5928 | if (*p0 == '\n') *--p1 = '\r'; | |
5929 | } | |
5930 | produced += num_eol; | |
5931 | produced_char += num_eol; | |
5932 | } | |
8844fa83 | 5933 | /* Suppress eol-format conversion in the further conversion. */ |
73be902c | 5934 | coding->eol_type = CODING_EOL_LF; |
8844fa83 KH |
5935 | |
5936 | /* Set the coding system symbol to that for Unix-like EOL. */ | |
5937 | eol_type = Fget (saved_coding_symbol, Qeol_type); | |
5938 | if (VECTORP (eol_type) | |
5939 | && XVECTOR (eol_type)->size == 3 | |
5940 | && SYMBOLP (XVECTOR (eol_type)->contents[CODING_EOL_LF])) | |
5941 | coding->symbol = XVECTOR (eol_type)->contents[CODING_EOL_LF]; | |
5942 | else | |
5943 | coding->symbol = saved_coding_symbol; | |
5944 | ||
5945 | ||
73be902c | 5946 | } |
4ed46869 | 5947 | } |
d46c5b12 | 5948 | |
2391eaa4 KH |
5949 | coding->consumed = consumed; |
5950 | coding->consumed_char = consumed_char; | |
5951 | coding->produced = produced; | |
5952 | coding->produced_char = produced_char; | |
5953 | ||
78108bcd | 5954 | if (coding->dst_multibyte) |
73be902c KH |
5955 | newstr = make_uninit_multibyte_string (produced_char + shrinked_bytes, |
5956 | produced + shrinked_bytes); | |
78108bcd | 5957 | else |
73be902c KH |
5958 | newstr = make_uninit_string (produced + shrinked_bytes); |
5959 | if (from > 0) | |
5960 | bcopy (XSTRING (str)->data, XSTRING (newstr)->data, from); | |
5961 | bcopy (buf.data, XSTRING (newstr)->data + from, produced); | |
5962 | if (shrinked_bytes > from) | |
5963 | bcopy (XSTRING (str)->data + to_byte, | |
5964 | XSTRING (newstr)->data + from + produced, | |
5965 | shrinked_bytes - from); | |
5966 | free_conversion_buffer (&buf); | |
b73bfc1c KH |
5967 | |
5968 | if (coding->cmp_data && coding->cmp_data->used) | |
73be902c | 5969 | coding_restore_composition (coding, newstr); |
b73bfc1c KH |
5970 | coding_free_composition_data (coding); |
5971 | ||
5972 | if (SYMBOLP (coding->post_read_conversion) | |
5973 | && !NILP (Ffboundp (coding->post_read_conversion))) | |
73be902c | 5974 | newstr = run_pre_post_conversion_on_str (newstr, coding, 0); |
b73bfc1c | 5975 | |
73be902c | 5976 | return newstr; |
b73bfc1c KH |
5977 | } |
5978 | ||
5979 | Lisp_Object | |
5980 | encode_coding_string (str, coding, nocopy) | |
5981 | Lisp_Object str; | |
5982 | struct coding_system *coding; | |
5983 | int nocopy; | |
5984 | { | |
5985 | int len; | |
73be902c | 5986 | struct conversion_buffer buf; |
b73bfc1c | 5987 | int from, to, to_byte; |
b73bfc1c | 5988 | int result; |
73be902c KH |
5989 | int shrinked_bytes = 0; |
5990 | Lisp_Object newstr; | |
2391eaa4 | 5991 | int consumed, consumed_char, produced, produced_char; |
b73bfc1c KH |
5992 | |
5993 | if (SYMBOLP (coding->pre_write_conversion) | |
5994 | && !NILP (Ffboundp (coding->pre_write_conversion))) | |
6bac5b12 | 5995 | str = run_pre_post_conversion_on_str (str, coding, 1); |
b73bfc1c KH |
5996 | |
5997 | from = 0; | |
5998 | to = XSTRING (str)->size; | |
5999 | to_byte = STRING_BYTES (XSTRING (str)); | |
6000 | ||
e2c06b17 KH |
6001 | /* Encoding routines determine the multibyteness of the source text |
6002 | by coding->src_multibyte. */ | |
6003 | coding->src_multibyte = STRING_MULTIBYTE (str); | |
6004 | coding->dst_multibyte = 0; | |
b73bfc1c | 6005 | if (! CODING_REQUIRE_ENCODING (coding)) |
826bfb8b | 6006 | { |
2391eaa4 KH |
6007 | coding->consumed = STRING_BYTES (XSTRING (str)); |
6008 | coding->consumed_char = XSTRING (str)->size; | |
b73bfc1c KH |
6009 | if (STRING_MULTIBYTE (str)) |
6010 | { | |
6011 | str = Fstring_as_unibyte (str); | |
6012 | nocopy = 1; | |
6013 | } | |
2391eaa4 KH |
6014 | coding->produced = STRING_BYTES (XSTRING (str)); |
6015 | coding->produced_char = XSTRING (str)->size; | |
b73bfc1c | 6016 | return (nocopy ? str : Fcopy_sequence (str)); |
826bfb8b KH |
6017 | } |
6018 | ||
b73bfc1c KH |
6019 | if (coding->composing != COMPOSITION_DISABLED) |
6020 | coding_save_composition (coding, from, to, str); | |
ec6d2bb8 | 6021 | |
b73bfc1c | 6022 | /* Try to skip the heading and tailing ASCIIs. */ |
4956c225 KH |
6023 | if (coding->type != coding_type_ccl) |
6024 | { | |
4956c225 KH |
6025 | SHRINK_CONVERSION_REGION (&from, &to_byte, coding, XSTRING (str)->data, |
6026 | 1); | |
6027 | if (from == to_byte) | |
6028 | return (nocopy ? str : Fcopy_sequence (str)); | |
73be902c | 6029 | shrinked_bytes = from + (STRING_BYTES (XSTRING (str)) - to_byte); |
4956c225 | 6030 | } |
b73bfc1c KH |
6031 | |
6032 | len = encoding_buffer_size (coding, to_byte - from); | |
73be902c KH |
6033 | allocate_conversion_buffer (buf, len); |
6034 | ||
2391eaa4 | 6035 | consumed = consumed_char = produced = produced_char = 0; |
73be902c KH |
6036 | while (1) |
6037 | { | |
6038 | result = encode_coding (coding, XSTRING (str)->data + from + consumed, | |
6039 | buf.data + produced, to_byte - from - consumed, | |
6040 | buf.size - produced); | |
6041 | consumed += coding->consumed; | |
2391eaa4 | 6042 | consumed_char += coding->consumed_char; |
13004bef | 6043 | produced += coding->produced; |
2391eaa4 KH |
6044 | produced_char += coding->produced_char; |
6045 | if (result == CODING_FINISH_NORMAL | |
6046 | || (result == CODING_FINISH_INSUFFICIENT_SRC | |
6047 | && coding->consumed == 0)) | |
73be902c KH |
6048 | break; |
6049 | /* Now result should be CODING_FINISH_INSUFFICIENT_DST. */ | |
6050 | extend_conversion_buffer (&buf); | |
6051 | } | |
6052 | ||
2391eaa4 KH |
6053 | coding->consumed = consumed; |
6054 | coding->consumed_char = consumed_char; | |
6055 | coding->produced = produced; | |
6056 | coding->produced_char = produced_char; | |
6057 | ||
73be902c | 6058 | newstr = make_uninit_string (produced + shrinked_bytes); |
b73bfc1c | 6059 | if (from > 0) |
73be902c KH |
6060 | bcopy (XSTRING (str)->data, XSTRING (newstr)->data, from); |
6061 | bcopy (buf.data, XSTRING (newstr)->data + from, produced); | |
6062 | if (shrinked_bytes > from) | |
6063 | bcopy (XSTRING (str)->data + to_byte, | |
6064 | XSTRING (newstr)->data + from + produced, | |
6065 | shrinked_bytes - from); | |
6066 | ||
6067 | free_conversion_buffer (&buf); | |
ec6d2bb8 | 6068 | coding_free_composition_data (coding); |
b73bfc1c | 6069 | |
73be902c | 6070 | return newstr; |
4ed46869 KH |
6071 | } |
6072 | ||
6073 | \f | |
6074 | #ifdef emacs | |
1397dc18 | 6075 | /*** 8. Emacs Lisp library functions ***/ |
4ed46869 | 6076 | |
4ed46869 KH |
6077 | DEFUN ("coding-system-p", Fcoding_system_p, Scoding_system_p, 1, 1, 0, |
6078 | "Return t if OBJECT is nil or a coding-system.\n\ | |
3a73fa5d RS |
6079 | See the documentation of `make-coding-system' for information\n\ |
6080 | about coding-system objects.") | |
4ed46869 KH |
6081 | (obj) |
6082 | Lisp_Object obj; | |
6083 | { | |
4608c386 KH |
6084 | if (NILP (obj)) |
6085 | return Qt; | |
6086 | if (!SYMBOLP (obj)) | |
6087 | return Qnil; | |
6088 | /* Get coding-spec vector for OBJ. */ | |
6089 | obj = Fget (obj, Qcoding_system); | |
6090 | return ((VECTORP (obj) && XVECTOR (obj)->size == 5) | |
6091 | ? Qt : Qnil); | |
4ed46869 KH |
6092 | } |
6093 | ||
9d991de8 RS |
6094 | DEFUN ("read-non-nil-coding-system", Fread_non_nil_coding_system, |
6095 | Sread_non_nil_coding_system, 1, 1, 0, | |
e0e989f6 | 6096 | "Read a coding system from the minibuffer, prompting with string PROMPT.") |
4ed46869 KH |
6097 | (prompt) |
6098 | Lisp_Object prompt; | |
6099 | { | |
e0e989f6 | 6100 | Lisp_Object val; |
9d991de8 RS |
6101 | do |
6102 | { | |
4608c386 KH |
6103 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
6104 | Qt, Qnil, Qcoding_system_history, Qnil, Qnil); | |
9d991de8 RS |
6105 | } |
6106 | while (XSTRING (val)->size == 0); | |
e0e989f6 | 6107 | return (Fintern (val, Qnil)); |
4ed46869 KH |
6108 | } |
6109 | ||
9b787f3e RS |
6110 | DEFUN ("read-coding-system", Fread_coding_system, Sread_coding_system, 1, 2, 0, |
6111 | "Read a coding system from the minibuffer, prompting with string PROMPT.\n\ | |
6112 | If the user enters null input, return second argument DEFAULT-CODING-SYSTEM.") | |
6113 | (prompt, default_coding_system) | |
6114 | Lisp_Object prompt, default_coding_system; | |
4ed46869 | 6115 | { |
f44d27ce | 6116 | Lisp_Object val; |
9b787f3e RS |
6117 | if (SYMBOLP (default_coding_system)) |
6118 | XSETSTRING (default_coding_system, XSYMBOL (default_coding_system)->name); | |
4608c386 | 6119 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
9b787f3e RS |
6120 | Qt, Qnil, Qcoding_system_history, |
6121 | default_coding_system, Qnil); | |
e0e989f6 | 6122 | return (XSTRING (val)->size == 0 ? Qnil : Fintern (val, Qnil)); |
4ed46869 KH |
6123 | } |
6124 | ||
6125 | DEFUN ("check-coding-system", Fcheck_coding_system, Scheck_coding_system, | |
6126 | 1, 1, 0, | |
6127 | "Check validity of CODING-SYSTEM.\n\ | |
3a73fa5d RS |
6128 | If valid, return CODING-SYSTEM, else signal a `coding-system-error' error.\n\ |
6129 | It is valid if it is a symbol with a non-nil `coding-system' property.\n\ | |
4ed46869 KH |
6130 | The value of property should be a vector of length 5.") |
6131 | (coding_system) | |
6132 | Lisp_Object coding_system; | |
6133 | { | |
6134 | CHECK_SYMBOL (coding_system, 0); | |
6135 | if (!NILP (Fcoding_system_p (coding_system))) | |
6136 | return coding_system; | |
6137 | while (1) | |
02ba4723 | 6138 | Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil)); |
4ed46869 | 6139 | } |
3a73fa5d | 6140 | \f |
d46c5b12 | 6141 | Lisp_Object |
0a28aafb | 6142 | detect_coding_system (src, src_bytes, highest, multibytep) |
d46c5b12 KH |
6143 | unsigned char *src; |
6144 | int src_bytes, highest; | |
0a28aafb | 6145 | int multibytep; |
4ed46869 KH |
6146 | { |
6147 | int coding_mask, eol_type; | |
d46c5b12 KH |
6148 | Lisp_Object val, tmp; |
6149 | int dummy; | |
4ed46869 | 6150 | |
0a28aafb | 6151 | coding_mask = detect_coding_mask (src, src_bytes, NULL, &dummy, multibytep); |
d46c5b12 KH |
6152 | eol_type = detect_eol_type (src, src_bytes, &dummy); |
6153 | if (eol_type == CODING_EOL_INCONSISTENT) | |
25b02698 | 6154 | eol_type = CODING_EOL_UNDECIDED; |
4ed46869 | 6155 | |
d46c5b12 | 6156 | if (!coding_mask) |
4ed46869 | 6157 | { |
27901516 | 6158 | val = Qundecided; |
d46c5b12 | 6159 | if (eol_type != CODING_EOL_UNDECIDED) |
4ed46869 | 6160 | { |
f44d27ce RS |
6161 | Lisp_Object val2; |
6162 | val2 = Fget (Qundecided, Qeol_type); | |
4ed46869 KH |
6163 | if (VECTORP (val2)) |
6164 | val = XVECTOR (val2)->contents[eol_type]; | |
6165 | } | |
80e803b4 | 6166 | return (highest ? val : Fcons (val, Qnil)); |
4ed46869 | 6167 | } |
4ed46869 | 6168 | |
d46c5b12 KH |
6169 | /* At first, gather possible coding systems in VAL. */ |
6170 | val = Qnil; | |
fa42c37f | 6171 | for (tmp = Vcoding_category_list; CONSP (tmp); tmp = XCDR (tmp)) |
4ed46869 | 6172 | { |
fa42c37f KH |
6173 | Lisp_Object category_val, category_index; |
6174 | ||
6175 | category_index = Fget (XCAR (tmp), Qcoding_category_index); | |
6176 | category_val = Fsymbol_value (XCAR (tmp)); | |
6177 | if (!NILP (category_val) | |
6178 | && NATNUMP (category_index) | |
6179 | && (coding_mask & (1 << XFASTINT (category_index)))) | |
4ed46869 | 6180 | { |
fa42c37f | 6181 | val = Fcons (category_val, val); |
d46c5b12 KH |
6182 | if (highest) |
6183 | break; | |
4ed46869 KH |
6184 | } |
6185 | } | |
d46c5b12 KH |
6186 | if (!highest) |
6187 | val = Fnreverse (val); | |
4ed46869 | 6188 | |
65059037 | 6189 | /* Then, replace the elements with subsidiary coding systems. */ |
fa42c37f | 6190 | for (tmp = val; CONSP (tmp); tmp = XCDR (tmp)) |
4ed46869 | 6191 | { |
65059037 RS |
6192 | if (eol_type != CODING_EOL_UNDECIDED |
6193 | && eol_type != CODING_EOL_INCONSISTENT) | |
4ed46869 | 6194 | { |
d46c5b12 | 6195 | Lisp_Object eol; |
03699b14 | 6196 | eol = Fget (XCAR (tmp), Qeol_type); |
d46c5b12 | 6197 | if (VECTORP (eol)) |
03699b14 | 6198 | XCAR (tmp) = XVECTOR (eol)->contents[eol_type]; |
4ed46869 KH |
6199 | } |
6200 | } | |
03699b14 | 6201 | return (highest ? XCAR (val) : val); |
d46c5b12 | 6202 | } |
4ed46869 | 6203 | |
d46c5b12 KH |
6204 | DEFUN ("detect-coding-region", Fdetect_coding_region, Sdetect_coding_region, |
6205 | 2, 3, 0, | |
6206 | "Detect coding system of the text in the region between START and END.\n\ | |
6207 | Return a list of possible coding systems ordered by priority.\n\ | |
6208 | \n\ | |
80e803b4 KH |
6209 | If only ASCII characters are found, it returns a list of single element\n\ |
6210 | `undecided' or its subsidiary coding system according to a detected\n\ | |
6211 | end-of-line format.\n\ | |
d46c5b12 KH |
6212 | \n\ |
6213 | If optional argument HIGHEST is non-nil, return the coding system of\n\ | |
6214 | highest priority.") | |
6215 | (start, end, highest) | |
6216 | Lisp_Object start, end, highest; | |
6217 | { | |
6218 | int from, to; | |
6219 | int from_byte, to_byte; | |
682169fe | 6220 | int include_anchor_byte = 0; |
6289dd10 | 6221 | |
d46c5b12 KH |
6222 | CHECK_NUMBER_COERCE_MARKER (start, 0); |
6223 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
4ed46869 | 6224 | |
d46c5b12 KH |
6225 | validate_region (&start, &end); |
6226 | from = XINT (start), to = XINT (end); | |
6227 | from_byte = CHAR_TO_BYTE (from); | |
6228 | to_byte = CHAR_TO_BYTE (to); | |
6289dd10 | 6229 | |
d46c5b12 KH |
6230 | if (from < GPT && to >= GPT) |
6231 | move_gap_both (to, to_byte); | |
c210f766 KH |
6232 | /* If we an anchor byte `\0' follows the region, we include it in |
6233 | the detecting source. Then code detectors can handle the tailing | |
6234 | byte sequence more accurately. | |
6235 | ||
6236 | Fix me: This is not an perfect solution. It is better that we | |
6237 | add one more argument, say LAST_BLOCK, to all detect_coding_XXX. | |
6238 | */ | |
682169fe KH |
6239 | if (to == Z || (to == GPT && GAP_SIZE > 0)) |
6240 | include_anchor_byte = 1; | |
d46c5b12 | 6241 | return detect_coding_system (BYTE_POS_ADDR (from_byte), |
682169fe | 6242 | to_byte - from_byte + include_anchor_byte, |
0a28aafb KH |
6243 | !NILP (highest), |
6244 | !NILP (current_buffer | |
6245 | ->enable_multibyte_characters)); | |
d46c5b12 | 6246 | } |
6289dd10 | 6247 | |
d46c5b12 KH |
6248 | DEFUN ("detect-coding-string", Fdetect_coding_string, Sdetect_coding_string, |
6249 | 1, 2, 0, | |
6250 | "Detect coding system of the text in STRING.\n\ | |
6251 | Return a list of possible coding systems ordered by priority.\n\ | |
6252 | \n\ | |
80e803b4 KH |
6253 | If only ASCII characters are found, it returns a list of single element\n\ |
6254 | `undecided' or its subsidiary coding system according to a detected\n\ | |
6255 | end-of-line format.\n\ | |
d46c5b12 KH |
6256 | \n\ |
6257 | If optional argument HIGHEST is non-nil, return the coding system of\n\ | |
6258 | highest priority.") | |
6259 | (string, highest) | |
6260 | Lisp_Object string, highest; | |
6261 | { | |
6262 | CHECK_STRING (string, 0); | |
4ed46869 | 6263 | |
d46c5b12 | 6264 | return detect_coding_system (XSTRING (string)->data, |
682169fe KH |
6265 | /* "+ 1" is to include the anchor byte |
6266 | `\0'. With this, code detectors can | |
c210f766 KH |
6267 | handle the tailing bytes more |
6268 | accurately. */ | |
682169fe | 6269 | STRING_BYTES (XSTRING (string)) + 1, |
0a28aafb KH |
6270 | !NILP (highest), |
6271 | STRING_MULTIBYTE (string)); | |
4ed46869 KH |
6272 | } |
6273 | ||
05e6f5dc KH |
6274 | /* Return an intersection of lists L1 and L2. */ |
6275 | ||
6276 | static Lisp_Object | |
6277 | intersection (l1, l2) | |
6278 | Lisp_Object l1, l2; | |
6279 | { | |
6280 | Lisp_Object val; | |
6281 | ||
6282 | for (val = Qnil; CONSP (l1); l1 = XCDR (l1)) | |
6283 | { | |
6284 | if (!NILP (Fmemq (XCAR (l1), l2))) | |
6285 | val = Fcons (XCAR (l1), val); | |
6286 | } | |
6287 | return val; | |
6288 | } | |
6289 | ||
6290 | ||
6291 | /* Subroutine for Fsafe_coding_systems_region_internal. | |
6292 | ||
6293 | Return a list of coding systems that safely encode the multibyte | |
6294 | text between P and PEND. SAFE_CODINGS, if non-nil, is a list of | |
6295 | possible coding systems. If it is nil, it means that we have not | |
6296 | yet found any coding systems. | |
6297 | ||
6298 | WORK_TABLE is a copy of the char-table Vchar_coding_system_table. An | |
6299 | element of WORK_TABLE is set to t once the element is looked up. | |
6300 | ||
6301 | If a non-ASCII single byte char is found, set | |
6302 | *single_byte_char_found to 1. */ | |
6303 | ||
6304 | static Lisp_Object | |
6305 | find_safe_codings (p, pend, safe_codings, work_table, single_byte_char_found) | |
6306 | unsigned char *p, *pend; | |
6307 | Lisp_Object safe_codings, work_table; | |
6308 | int *single_byte_char_found; | |
6309 | { | |
6310 | int c, len, idx; | |
6311 | Lisp_Object val; | |
6312 | ||
6313 | while (p < pend) | |
6314 | { | |
6315 | c = STRING_CHAR_AND_LENGTH (p, pend - p, len); | |
6316 | p += len; | |
6317 | if (ASCII_BYTE_P (c)) | |
6318 | /* We can ignore ASCII characters here. */ | |
6319 | continue; | |
6320 | if (SINGLE_BYTE_CHAR_P (c)) | |
6321 | *single_byte_char_found = 1; | |
6322 | if (NILP (safe_codings)) | |
6323 | continue; | |
6324 | /* Check the safe coding systems for C. */ | |
6325 | val = char_table_ref_and_index (work_table, c, &idx); | |
6326 | if (EQ (val, Qt)) | |
6327 | /* This element was already checked. Ignore it. */ | |
6328 | continue; | |
6329 | /* Remember that we checked this element. */ | |
975f250a | 6330 | CHAR_TABLE_SET (work_table, make_number (idx), Qt); |
05e6f5dc KH |
6331 | |
6332 | /* If there are some safe coding systems for C and we have | |
6333 | already found the other set of coding systems for the | |
6334 | different characters, get the intersection of them. */ | |
6335 | if (!EQ (safe_codings, Qt) && !NILP (val)) | |
6336 | val = intersection (safe_codings, val); | |
6337 | safe_codings = val; | |
6338 | } | |
6339 | return safe_codings; | |
6340 | } | |
6341 | ||
6342 | ||
6343 | /* Return a list of coding systems that safely encode the text between | |
6344 | START and END. If the text contains only ASCII or is unibyte, | |
6345 | return t. */ | |
6346 | ||
6347 | DEFUN ("find-coding-systems-region-internal", | |
6348 | Ffind_coding_systems_region_internal, | |
6349 | Sfind_coding_systems_region_internal, 2, 2, 0, | |
6350 | "Internal use only.") | |
6351 | (start, end) | |
6352 | Lisp_Object start, end; | |
6353 | { | |
6354 | Lisp_Object work_table, safe_codings; | |
6355 | int non_ascii_p = 0; | |
6356 | int single_byte_char_found = 0; | |
6357 | unsigned char *p1, *p1end, *p2, *p2end, *p; | |
05e6f5dc KH |
6358 | |
6359 | if (STRINGP (start)) | |
6360 | { | |
6361 | if (!STRING_MULTIBYTE (start)) | |
6362 | return Qt; | |
6363 | p1 = XSTRING (start)->data, p1end = p1 + STRING_BYTES (XSTRING (start)); | |
6364 | p2 = p2end = p1end; | |
6365 | if (XSTRING (start)->size != STRING_BYTES (XSTRING (start))) | |
6366 | non_ascii_p = 1; | |
6367 | } | |
6368 | else | |
6369 | { | |
6370 | int from, to, stop; | |
6371 | ||
6372 | CHECK_NUMBER_COERCE_MARKER (start, 0); | |
6373 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
6374 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) | |
6375 | args_out_of_range (start, end); | |
6376 | if (NILP (current_buffer->enable_multibyte_characters)) | |
6377 | return Qt; | |
6378 | from = CHAR_TO_BYTE (XINT (start)); | |
6379 | to = CHAR_TO_BYTE (XINT (end)); | |
6380 | stop = from < GPT_BYTE && GPT_BYTE < to ? GPT_BYTE : to; | |
6381 | p1 = BYTE_POS_ADDR (from), p1end = p1 + (stop - from); | |
6382 | if (stop == to) | |
6383 | p2 = p2end = p1end; | |
6384 | else | |
6385 | p2 = BYTE_POS_ADDR (stop), p2end = p2 + (to - stop); | |
6386 | if (XINT (end) - XINT (start) != to - from) | |
6387 | non_ascii_p = 1; | |
6388 | } | |
6389 | ||
6390 | if (!non_ascii_p) | |
6391 | { | |
6392 | /* We are sure that the text contains no multibyte character. | |
6393 | Check if it contains eight-bit-graphic. */ | |
6394 | p = p1; | |
6395 | for (p = p1; p < p1end && ASCII_BYTE_P (*p); p++); | |
6396 | if (p == p1end) | |
6397 | { | |
6398 | for (p = p2; p < p2end && ASCII_BYTE_P (*p); p++); | |
6399 | if (p == p2end) | |
6400 | return Qt; | |
6401 | } | |
6402 | } | |
6403 | ||
6404 | /* The text contains non-ASCII characters. */ | |
6405 | work_table = Fcopy_sequence (Vchar_coding_system_table); | |
6406 | safe_codings = find_safe_codings (p1, p1end, Qt, work_table, | |
6407 | &single_byte_char_found); | |
6408 | if (p2 < p2end) | |
6409 | safe_codings = find_safe_codings (p2, p2end, safe_codings, work_table, | |
6410 | &single_byte_char_found); | |
6411 | ||
6412 | if (!single_byte_char_found) | |
6413 | { | |
6414 | /* Append generic coding systems. */ | |
6415 | Lisp_Object args[2]; | |
6416 | args[0] = safe_codings; | |
6417 | args[1] = Fchar_table_extra_slot (Vchar_coding_system_table, | |
6418 | make_number (0)); | |
975f250a | 6419 | safe_codings = Fappend (2, args); |
05e6f5dc KH |
6420 | } |
6421 | else | |
109a5acb KH |
6422 | safe_codings = Fcons (Qraw_text, |
6423 | Fcons (Qemacs_mule, | |
6424 | Fcons (Qno_conversion, safe_codings))); | |
05e6f5dc KH |
6425 | return safe_codings; |
6426 | } | |
6427 | ||
6428 | ||
4031e2bf KH |
6429 | Lisp_Object |
6430 | code_convert_region1 (start, end, coding_system, encodep) | |
d46c5b12 | 6431 | Lisp_Object start, end, coding_system; |
4031e2bf | 6432 | int encodep; |
3a73fa5d RS |
6433 | { |
6434 | struct coding_system coding; | |
da55a2b7 | 6435 | int from, to; |
3a73fa5d | 6436 | |
d46c5b12 KH |
6437 | CHECK_NUMBER_COERCE_MARKER (start, 0); |
6438 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
3a73fa5d RS |
6439 | CHECK_SYMBOL (coding_system, 2); |
6440 | ||
d46c5b12 KH |
6441 | validate_region (&start, &end); |
6442 | from = XFASTINT (start); | |
6443 | to = XFASTINT (end); | |
6444 | ||
3a73fa5d | 6445 | if (NILP (coding_system)) |
d46c5b12 KH |
6446 | return make_number (to - from); |
6447 | ||
3a73fa5d | 6448 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) |
d46c5b12 | 6449 | error ("Invalid coding system: %s", XSYMBOL (coding_system)->name->data); |
3a73fa5d | 6450 | |
d46c5b12 | 6451 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
6452 | coding.src_multibyte = coding.dst_multibyte |
6453 | = !NILP (current_buffer->enable_multibyte_characters); | |
fb88bf2d KH |
6454 | code_convert_region (from, CHAR_TO_BYTE (from), to, CHAR_TO_BYTE (to), |
6455 | &coding, encodep, 1); | |
f072a3e8 | 6456 | Vlast_coding_system_used = coding.symbol; |
fb88bf2d | 6457 | return make_number (coding.produced_char); |
4031e2bf KH |
6458 | } |
6459 | ||
6460 | DEFUN ("decode-coding-region", Fdecode_coding_region, Sdecode_coding_region, | |
6461 | 3, 3, "r\nzCoding system: ", | |
cfb43547 | 6462 | "Decode the current region from the specified coding system.\n\ |
4031e2bf KH |
6463 | When called from a program, takes three arguments:\n\ |
6464 | START, END, and CODING-SYSTEM. START and END are buffer positions.\n\ | |
f072a3e8 RS |
6465 | This function sets `last-coding-system-used' to the precise coding system\n\ |
6466 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is\n\ | |
6467 | not fully specified.)\n\ | |
6468 | It returns the length of the decoded text.") | |
4031e2bf KH |
6469 | (start, end, coding_system) |
6470 | Lisp_Object start, end, coding_system; | |
6471 | { | |
6472 | return code_convert_region1 (start, end, coding_system, 0); | |
3a73fa5d RS |
6473 | } |
6474 | ||
6475 | DEFUN ("encode-coding-region", Fencode_coding_region, Sencode_coding_region, | |
6476 | 3, 3, "r\nzCoding system: ", | |
cfb43547 | 6477 | "Encode the current region into the specified coding system.\n\ |
3a73fa5d | 6478 | When called from a program, takes three arguments:\n\ |
d46c5b12 | 6479 | START, END, and CODING-SYSTEM. START and END are buffer positions.\n\ |
f072a3e8 RS |
6480 | This function sets `last-coding-system-used' to the precise coding system\n\ |
6481 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is\n\ | |
6482 | not fully specified.)\n\ | |
6483 | It returns the length of the encoded text.") | |
d46c5b12 KH |
6484 | (start, end, coding_system) |
6485 | Lisp_Object start, end, coding_system; | |
3a73fa5d | 6486 | { |
4031e2bf KH |
6487 | return code_convert_region1 (start, end, coding_system, 1); |
6488 | } | |
3a73fa5d | 6489 | |
4031e2bf KH |
6490 | Lisp_Object |
6491 | code_convert_string1 (string, coding_system, nocopy, encodep) | |
6492 | Lisp_Object string, coding_system, nocopy; | |
6493 | int encodep; | |
6494 | { | |
6495 | struct coding_system coding; | |
3a73fa5d | 6496 | |
4031e2bf KH |
6497 | CHECK_STRING (string, 0); |
6498 | CHECK_SYMBOL (coding_system, 1); | |
4ed46869 | 6499 | |
d46c5b12 | 6500 | if (NILP (coding_system)) |
4031e2bf | 6501 | return (NILP (nocopy) ? Fcopy_sequence (string) : string); |
4ed46869 | 6502 | |
d46c5b12 KH |
6503 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) |
6504 | error ("Invalid coding system: %s", XSYMBOL (coding_system)->name->data); | |
5f1cd180 | 6505 | |
d46c5b12 | 6506 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
6507 | string = (encodep |
6508 | ? encode_coding_string (string, &coding, !NILP (nocopy)) | |
6509 | : decode_coding_string (string, &coding, !NILP (nocopy))); | |
f072a3e8 | 6510 | Vlast_coding_system_used = coding.symbol; |
ec6d2bb8 KH |
6511 | |
6512 | return string; | |
4ed46869 KH |
6513 | } |
6514 | ||
4ed46869 | 6515 | DEFUN ("decode-coding-string", Fdecode_coding_string, Sdecode_coding_string, |
e0e989f6 KH |
6516 | 2, 3, 0, |
6517 | "Decode STRING which is encoded in CODING-SYSTEM, and return the result.\n\ | |
8ca3766a | 6518 | Optional arg NOCOPY non-nil means it is OK to return STRING itself\n\ |
f072a3e8 RS |
6519 | if the decoding operation is trivial.\n\ |
6520 | This function sets `last-coding-system-used' to the precise coding system\n\ | |
6521 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is\n\ | |
6522 | not fully specified.)") | |
e0e989f6 KH |
6523 | (string, coding_system, nocopy) |
6524 | Lisp_Object string, coding_system, nocopy; | |
4ed46869 | 6525 | { |
f072a3e8 | 6526 | return code_convert_string1 (string, coding_system, nocopy, 0); |
4ed46869 KH |
6527 | } |
6528 | ||
6529 | DEFUN ("encode-coding-string", Fencode_coding_string, Sencode_coding_string, | |
e0e989f6 KH |
6530 | 2, 3, 0, |
6531 | "Encode STRING to CODING-SYSTEM, and return the result.\n\ | |
8ca3766a | 6532 | Optional arg NOCOPY non-nil means it is OK to return STRING itself\n\ |
f072a3e8 RS |
6533 | if the encoding operation is trivial.\n\ |
6534 | This function sets `last-coding-system-used' to the precise coding system\n\ | |
6535 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is\n\ | |
6536 | not fully specified.)") | |
e0e989f6 KH |
6537 | (string, coding_system, nocopy) |
6538 | Lisp_Object string, coding_system, nocopy; | |
4ed46869 | 6539 | { |
f072a3e8 | 6540 | return code_convert_string1 (string, coding_system, nocopy, 1); |
4ed46869 | 6541 | } |
4031e2bf | 6542 | |
ecec61c1 | 6543 | /* Encode or decode STRING according to CODING_SYSTEM. |
ec6d2bb8 KH |
6544 | Do not set Vlast_coding_system_used. |
6545 | ||
6546 | This function is called only from macros DECODE_FILE and | |
6547 | ENCODE_FILE, thus we ignore character composition. */ | |
ecec61c1 KH |
6548 | |
6549 | Lisp_Object | |
6550 | code_convert_string_norecord (string, coding_system, encodep) | |
6551 | Lisp_Object string, coding_system; | |
6552 | int encodep; | |
6553 | { | |
6554 | struct coding_system coding; | |
6555 | ||
6556 | CHECK_STRING (string, 0); | |
6557 | CHECK_SYMBOL (coding_system, 1); | |
6558 | ||
6559 | if (NILP (coding_system)) | |
6560 | return string; | |
6561 | ||
6562 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) | |
6563 | error ("Invalid coding system: %s", XSYMBOL (coding_system)->name->data); | |
6564 | ||
ec6d2bb8 | 6565 | coding.composing = COMPOSITION_DISABLED; |
ecec61c1 | 6566 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
6567 | return (encodep |
6568 | ? encode_coding_string (string, &coding, 1) | |
6569 | : decode_coding_string (string, &coding, 1)); | |
ecec61c1 | 6570 | } |
3a73fa5d | 6571 | \f |
4ed46869 | 6572 | DEFUN ("decode-sjis-char", Fdecode_sjis_char, Sdecode_sjis_char, 1, 1, 0, |
55ab7be3 | 6573 | "Decode a Japanese character which has CODE in shift_jis encoding.\n\ |
4ed46869 KH |
6574 | Return the corresponding character.") |
6575 | (code) | |
6576 | Lisp_Object code; | |
6577 | { | |
6578 | unsigned char c1, c2, s1, s2; | |
6579 | Lisp_Object val; | |
6580 | ||
6581 | CHECK_NUMBER (code, 0); | |
6582 | s1 = (XFASTINT (code)) >> 8, s2 = (XFASTINT (code)) & 0xFF; | |
55ab7be3 KH |
6583 | if (s1 == 0) |
6584 | { | |
c28a9453 KH |
6585 | if (s2 < 0x80) |
6586 | XSETFASTINT (val, s2); | |
6587 | else if (s2 >= 0xA0 || s2 <= 0xDF) | |
b73bfc1c | 6588 | XSETFASTINT (val, MAKE_CHAR (charset_katakana_jisx0201, s2, 0)); |
c28a9453 | 6589 | else |
9da8350f | 6590 | error ("Invalid Shift JIS code: %x", XFASTINT (code)); |
55ab7be3 KH |
6591 | } |
6592 | else | |
6593 | { | |
6594 | if ((s1 < 0x80 || s1 > 0x9F && s1 < 0xE0 || s1 > 0xEF) | |
6595 | || (s2 < 0x40 || s2 == 0x7F || s2 > 0xFC)) | |
9da8350f | 6596 | error ("Invalid Shift JIS code: %x", XFASTINT (code)); |
55ab7be3 | 6597 | DECODE_SJIS (s1, s2, c1, c2); |
b73bfc1c | 6598 | XSETFASTINT (val, MAKE_CHAR (charset_jisx0208, c1, c2)); |
55ab7be3 | 6599 | } |
4ed46869 KH |
6600 | return val; |
6601 | } | |
6602 | ||
6603 | DEFUN ("encode-sjis-char", Fencode_sjis_char, Sencode_sjis_char, 1, 1, 0, | |
55ab7be3 KH |
6604 | "Encode a Japanese character CHAR to shift_jis encoding.\n\ |
6605 | Return the corresponding code in SJIS.") | |
4ed46869 KH |
6606 | (ch) |
6607 | Lisp_Object ch; | |
6608 | { | |
bcf26d6a | 6609 | int charset, c1, c2, s1, s2; |
4ed46869 KH |
6610 | Lisp_Object val; |
6611 | ||
6612 | CHECK_NUMBER (ch, 0); | |
6613 | SPLIT_CHAR (XFASTINT (ch), charset, c1, c2); | |
c28a9453 KH |
6614 | if (charset == CHARSET_ASCII) |
6615 | { | |
6616 | val = ch; | |
6617 | } | |
6618 | else if (charset == charset_jisx0208 | |
6619 | && c1 > 0x20 && c1 < 0x7F && c2 > 0x20 && c2 < 0x7F) | |
4ed46869 KH |
6620 | { |
6621 | ENCODE_SJIS (c1, c2, s1, s2); | |
bcf26d6a | 6622 | XSETFASTINT (val, (s1 << 8) | s2); |
4ed46869 | 6623 | } |
55ab7be3 KH |
6624 | else if (charset == charset_katakana_jisx0201 |
6625 | && c1 > 0x20 && c2 < 0xE0) | |
6626 | { | |
6627 | XSETFASTINT (val, c1 | 0x80); | |
6628 | } | |
4ed46869 | 6629 | else |
55ab7be3 | 6630 | error ("Can't encode to shift_jis: %d", XFASTINT (ch)); |
4ed46869 KH |
6631 | return val; |
6632 | } | |
6633 | ||
6634 | DEFUN ("decode-big5-char", Fdecode_big5_char, Sdecode_big5_char, 1, 1, 0, | |
c28a9453 | 6635 | "Decode a Big5 character which has CODE in BIG5 coding system.\n\ |
4ed46869 KH |
6636 | Return the corresponding character.") |
6637 | (code) | |
6638 | Lisp_Object code; | |
6639 | { | |
6640 | int charset; | |
6641 | unsigned char b1, b2, c1, c2; | |
6642 | Lisp_Object val; | |
6643 | ||
6644 | CHECK_NUMBER (code, 0); | |
6645 | b1 = (XFASTINT (code)) >> 8, b2 = (XFASTINT (code)) & 0xFF; | |
c28a9453 KH |
6646 | if (b1 == 0) |
6647 | { | |
6648 | if (b2 >= 0x80) | |
9da8350f | 6649 | error ("Invalid BIG5 code: %x", XFASTINT (code)); |
c28a9453 KH |
6650 | val = code; |
6651 | } | |
6652 | else | |
6653 | { | |
6654 | if ((b1 < 0xA1 || b1 > 0xFE) | |
6655 | || (b2 < 0x40 || (b2 > 0x7E && b2 < 0xA1) || b2 > 0xFE)) | |
9da8350f | 6656 | error ("Invalid BIG5 code: %x", XFASTINT (code)); |
c28a9453 | 6657 | DECODE_BIG5 (b1, b2, charset, c1, c2); |
b73bfc1c | 6658 | XSETFASTINT (val, MAKE_CHAR (charset, c1, c2)); |
c28a9453 | 6659 | } |
4ed46869 KH |
6660 | return val; |
6661 | } | |
6662 | ||
6663 | DEFUN ("encode-big5-char", Fencode_big5_char, Sencode_big5_char, 1, 1, 0, | |
d46c5b12 | 6664 | "Encode the Big5 character CHAR to BIG5 coding system.\n\ |
4ed46869 KH |
6665 | Return the corresponding character code in Big5.") |
6666 | (ch) | |
6667 | Lisp_Object ch; | |
6668 | { | |
bcf26d6a | 6669 | int charset, c1, c2, b1, b2; |
4ed46869 KH |
6670 | Lisp_Object val; |
6671 | ||
6672 | CHECK_NUMBER (ch, 0); | |
6673 | SPLIT_CHAR (XFASTINT (ch), charset, c1, c2); | |
c28a9453 KH |
6674 | if (charset == CHARSET_ASCII) |
6675 | { | |
6676 | val = ch; | |
6677 | } | |
6678 | else if ((charset == charset_big5_1 | |
6679 | && (XFASTINT (ch) >= 0x250a1 && XFASTINT (ch) <= 0x271ec)) | |
6680 | || (charset == charset_big5_2 | |
6681 | && XFASTINT (ch) >= 0x290a1 && XFASTINT (ch) <= 0x2bdb2)) | |
4ed46869 KH |
6682 | { |
6683 | ENCODE_BIG5 (charset, c1, c2, b1, b2); | |
bcf26d6a | 6684 | XSETFASTINT (val, (b1 << 8) | b2); |
4ed46869 KH |
6685 | } |
6686 | else | |
c28a9453 | 6687 | error ("Can't encode to Big5: %d", XFASTINT (ch)); |
4ed46869 KH |
6688 | return val; |
6689 | } | |
3a73fa5d | 6690 | \f |
1ba9e4ab KH |
6691 | DEFUN ("set-terminal-coding-system-internal", |
6692 | Fset_terminal_coding_system_internal, | |
6693 | Sset_terminal_coding_system_internal, 1, 1, 0, "") | |
4ed46869 KH |
6694 | (coding_system) |
6695 | Lisp_Object coding_system; | |
6696 | { | |
6697 | CHECK_SYMBOL (coding_system, 0); | |
6698 | setup_coding_system (Fcheck_coding_system (coding_system), &terminal_coding); | |
70c22245 | 6699 | /* We had better not send unsafe characters to terminal. */ |
6e85d753 | 6700 | terminal_coding.flags |= CODING_FLAG_ISO_SAFE; |
8ca3766a | 6701 | /* Character composition should be disabled. */ |
ec6d2bb8 | 6702 | terminal_coding.composing = COMPOSITION_DISABLED; |
bd64290d KH |
6703 | /* Error notification should be suppressed. */ |
6704 | terminal_coding.suppress_error = 1; | |
b73bfc1c KH |
6705 | terminal_coding.src_multibyte = 1; |
6706 | terminal_coding.dst_multibyte = 0; | |
4ed46869 KH |
6707 | return Qnil; |
6708 | } | |
6709 | ||
c4825358 KH |
6710 | DEFUN ("set-safe-terminal-coding-system-internal", |
6711 | Fset_safe_terminal_coding_system_internal, | |
6712 | Sset_safe_terminal_coding_system_internal, 1, 1, 0, "") | |
6713 | (coding_system) | |
6714 | Lisp_Object coding_system; | |
6715 | { | |
6716 | CHECK_SYMBOL (coding_system, 0); | |
6717 | setup_coding_system (Fcheck_coding_system (coding_system), | |
6718 | &safe_terminal_coding); | |
8ca3766a | 6719 | /* Character composition should be disabled. */ |
ec6d2bb8 | 6720 | safe_terminal_coding.composing = COMPOSITION_DISABLED; |
bd64290d KH |
6721 | /* Error notification should be suppressed. */ |
6722 | terminal_coding.suppress_error = 1; | |
b73bfc1c KH |
6723 | safe_terminal_coding.src_multibyte = 1; |
6724 | safe_terminal_coding.dst_multibyte = 0; | |
c4825358 KH |
6725 | return Qnil; |
6726 | } | |
6727 | ||
4ed46869 KH |
6728 | DEFUN ("terminal-coding-system", |
6729 | Fterminal_coding_system, Sterminal_coding_system, 0, 0, 0, | |
3a73fa5d | 6730 | "Return coding system specified for terminal output.") |
4ed46869 KH |
6731 | () |
6732 | { | |
6733 | return terminal_coding.symbol; | |
6734 | } | |
6735 | ||
1ba9e4ab KH |
6736 | DEFUN ("set-keyboard-coding-system-internal", |
6737 | Fset_keyboard_coding_system_internal, | |
6738 | Sset_keyboard_coding_system_internal, 1, 1, 0, "") | |
4ed46869 KH |
6739 | (coding_system) |
6740 | Lisp_Object coding_system; | |
6741 | { | |
6742 | CHECK_SYMBOL (coding_system, 0); | |
6743 | setup_coding_system (Fcheck_coding_system (coding_system), &keyboard_coding); | |
8ca3766a | 6744 | /* Character composition should be disabled. */ |
ec6d2bb8 | 6745 | keyboard_coding.composing = COMPOSITION_DISABLED; |
4ed46869 KH |
6746 | return Qnil; |
6747 | } | |
6748 | ||
6749 | DEFUN ("keyboard-coding-system", | |
6750 | Fkeyboard_coding_system, Skeyboard_coding_system, 0, 0, 0, | |
3a73fa5d | 6751 | "Return coding system specified for decoding keyboard input.") |
4ed46869 KH |
6752 | () |
6753 | { | |
6754 | return keyboard_coding.symbol; | |
6755 | } | |
6756 | ||
6757 | \f | |
a5d301df KH |
6758 | DEFUN ("find-operation-coding-system", Ffind_operation_coding_system, |
6759 | Sfind_operation_coding_system, 1, MANY, 0, | |
6760 | "Choose a coding system for an operation based on the target name.\n\ | |
69f76525 | 6761 | The value names a pair of coding systems: (DECODING-SYSTEM . ENCODING-SYSTEM).\n\ |
9ce27fde KH |
6762 | DECODING-SYSTEM is the coding system to use for decoding\n\ |
6763 | \(in case OPERATION does decoding), and ENCODING-SYSTEM is the coding system\n\ | |
6764 | for encoding (in case OPERATION does encoding).\n\ | |
ccdb79f5 RS |
6765 | \n\ |
6766 | The first argument OPERATION specifies an I/O primitive:\n\ | |
6767 | For file I/O, `insert-file-contents' or `write-region'.\n\ | |
6768 | For process I/O, `call-process', `call-process-region', or `start-process'.\n\ | |
6769 | For network I/O, `open-network-stream'.\n\ | |
6770 | \n\ | |
6771 | The remaining arguments should be the same arguments that were passed\n\ | |
6772 | to the primitive. Depending on which primitive, one of those arguments\n\ | |
6773 | is selected as the TARGET. For example, if OPERATION does file I/O,\n\ | |
6774 | whichever argument specifies the file name is TARGET.\n\ | |
6775 | \n\ | |
6776 | TARGET has a meaning which depends on OPERATION:\n\ | |
4ed46869 KH |
6777 | For file I/O, TARGET is a file name.\n\ |
6778 | For process I/O, TARGET is a process name.\n\ | |
6779 | For network I/O, TARGET is a service name or a port number\n\ | |
6780 | \n\ | |
02ba4723 KH |
6781 | This function looks up what specified for TARGET in,\n\ |
6782 | `file-coding-system-alist', `process-coding-system-alist',\n\ | |
6783 | or `network-coding-system-alist' depending on OPERATION.\n\ | |
6784 | They may specify a coding system, a cons of coding systems,\n\ | |
6785 | or a function symbol to call.\n\ | |
6786 | In the last case, we call the function with one argument,\n\ | |
9ce27fde | 6787 | which is a list of all the arguments given to this function.") |
4ed46869 KH |
6788 | (nargs, args) |
6789 | int nargs; | |
6790 | Lisp_Object *args; | |
6791 | { | |
6792 | Lisp_Object operation, target_idx, target, val; | |
6793 | register Lisp_Object chain; | |
6794 | ||
6795 | if (nargs < 2) | |
6796 | error ("Too few arguments"); | |
6797 | operation = args[0]; | |
6798 | if (!SYMBOLP (operation) | |
6799 | || !INTEGERP (target_idx = Fget (operation, Qtarget_idx))) | |
8ca3766a | 6800 | error ("Invalid first argument"); |
4ed46869 KH |
6801 | if (nargs < 1 + XINT (target_idx)) |
6802 | error ("Too few arguments for operation: %s", | |
6803 | XSYMBOL (operation)->name->data); | |
6804 | target = args[XINT (target_idx) + 1]; | |
6805 | if (!(STRINGP (target) | |
6806 | || (EQ (operation, Qopen_network_stream) && INTEGERP (target)))) | |
8ca3766a | 6807 | error ("Invalid argument %d", XINT (target_idx) + 1); |
4ed46869 | 6808 | |
2e34157c RS |
6809 | chain = ((EQ (operation, Qinsert_file_contents) |
6810 | || EQ (operation, Qwrite_region)) | |
02ba4723 | 6811 | ? Vfile_coding_system_alist |
2e34157c | 6812 | : (EQ (operation, Qopen_network_stream) |
02ba4723 KH |
6813 | ? Vnetwork_coding_system_alist |
6814 | : Vprocess_coding_system_alist)); | |
4ed46869 KH |
6815 | if (NILP (chain)) |
6816 | return Qnil; | |
6817 | ||
03699b14 | 6818 | for (; CONSP (chain); chain = XCDR (chain)) |
4ed46869 | 6819 | { |
f44d27ce | 6820 | Lisp_Object elt; |
03699b14 | 6821 | elt = XCAR (chain); |
4ed46869 KH |
6822 | |
6823 | if (CONSP (elt) | |
6824 | && ((STRINGP (target) | |
03699b14 KR |
6825 | && STRINGP (XCAR (elt)) |
6826 | && fast_string_match (XCAR (elt), target) >= 0) | |
6827 | || (INTEGERP (target) && EQ (target, XCAR (elt))))) | |
02ba4723 | 6828 | { |
03699b14 | 6829 | val = XCDR (elt); |
b19fd4c5 KH |
6830 | /* Here, if VAL is both a valid coding system and a valid |
6831 | function symbol, we return VAL as a coding system. */ | |
02ba4723 KH |
6832 | if (CONSP (val)) |
6833 | return val; | |
6834 | if (! SYMBOLP (val)) | |
6835 | return Qnil; | |
6836 | if (! NILP (Fcoding_system_p (val))) | |
6837 | return Fcons (val, val); | |
b19fd4c5 KH |
6838 | if (! NILP (Ffboundp (val))) |
6839 | { | |
6840 | val = call1 (val, Flist (nargs, args)); | |
6841 | if (CONSP (val)) | |
6842 | return val; | |
6843 | if (SYMBOLP (val) && ! NILP (Fcoding_system_p (val))) | |
6844 | return Fcons (val, val); | |
6845 | } | |
02ba4723 KH |
6846 | return Qnil; |
6847 | } | |
4ed46869 KH |
6848 | } |
6849 | return Qnil; | |
6850 | } | |
6851 | ||
1397dc18 KH |
6852 | DEFUN ("update-coding-systems-internal", Fupdate_coding_systems_internal, |
6853 | Supdate_coding_systems_internal, 0, 0, 0, | |
6854 | "Update internal database for ISO2022 and CCL based coding systems.\n\ | |
fa42c37f KH |
6855 | When values of any coding categories are changed, you must\n\ |
6856 | call this function") | |
d46c5b12 KH |
6857 | () |
6858 | { | |
6859 | int i; | |
6860 | ||
fa42c37f | 6861 | for (i = CODING_CATEGORY_IDX_EMACS_MULE; i < CODING_CATEGORY_IDX_MAX; i++) |
d46c5b12 | 6862 | { |
1397dc18 KH |
6863 | Lisp_Object val; |
6864 | ||
6865 | val = XSYMBOL (XVECTOR (Vcoding_category_table)->contents[i])->value; | |
6866 | if (!NILP (val)) | |
6867 | { | |
6868 | if (! coding_system_table[i]) | |
6869 | coding_system_table[i] = ((struct coding_system *) | |
6870 | xmalloc (sizeof (struct coding_system))); | |
6871 | setup_coding_system (val, coding_system_table[i]); | |
6872 | } | |
6873 | else if (coding_system_table[i]) | |
6874 | { | |
6875 | xfree (coding_system_table[i]); | |
6876 | coding_system_table[i] = NULL; | |
6877 | } | |
d46c5b12 | 6878 | } |
1397dc18 | 6879 | |
d46c5b12 KH |
6880 | return Qnil; |
6881 | } | |
6882 | ||
66cfb530 KH |
6883 | DEFUN ("set-coding-priority-internal", Fset_coding_priority_internal, |
6884 | Sset_coding_priority_internal, 0, 0, 0, | |
6885 | "Update internal database for the current value of `coding-category-list'.\n\ | |
6886 | This function is internal use only.") | |
6887 | () | |
6888 | { | |
6889 | int i = 0, idx; | |
84d60297 RS |
6890 | Lisp_Object val; |
6891 | ||
6892 | val = Vcoding_category_list; | |
66cfb530 KH |
6893 | |
6894 | while (CONSP (val) && i < CODING_CATEGORY_IDX_MAX) | |
6895 | { | |
03699b14 | 6896 | if (! SYMBOLP (XCAR (val))) |
66cfb530 | 6897 | break; |
03699b14 | 6898 | idx = XFASTINT (Fget (XCAR (val), Qcoding_category_index)); |
66cfb530 KH |
6899 | if (idx >= CODING_CATEGORY_IDX_MAX) |
6900 | break; | |
6901 | coding_priorities[i++] = (1 << idx); | |
03699b14 | 6902 | val = XCDR (val); |
66cfb530 KH |
6903 | } |
6904 | /* If coding-category-list is valid and contains all coding | |
6905 | categories, `i' should be CODING_CATEGORY_IDX_MAX now. If not, | |
fa42c37f | 6906 | the following code saves Emacs from crashing. */ |
66cfb530 KH |
6907 | while (i < CODING_CATEGORY_IDX_MAX) |
6908 | coding_priorities[i++] = CODING_CATEGORY_MASK_RAW_TEXT; | |
6909 | ||
6910 | return Qnil; | |
6911 | } | |
6912 | ||
4ed46869 KH |
6913 | #endif /* emacs */ |
6914 | ||
6915 | \f | |
1397dc18 | 6916 | /*** 9. Post-amble ***/ |
4ed46869 | 6917 | |
dfcf069d | 6918 | void |
4ed46869 KH |
6919 | init_coding_once () |
6920 | { | |
6921 | int i; | |
6922 | ||
0ef69138 | 6923 | /* Emacs' internal format specific initialize routine. */ |
4ed46869 KH |
6924 | for (i = 0; i <= 0x20; i++) |
6925 | emacs_code_class[i] = EMACS_control_code; | |
6926 | emacs_code_class[0x0A] = EMACS_linefeed_code; | |
6927 | emacs_code_class[0x0D] = EMACS_carriage_return_code; | |
6928 | for (i = 0x21 ; i < 0x7F; i++) | |
6929 | emacs_code_class[i] = EMACS_ascii_code; | |
6930 | emacs_code_class[0x7F] = EMACS_control_code; | |
ec6d2bb8 | 6931 | for (i = 0x80; i < 0xFF; i++) |
4ed46869 KH |
6932 | emacs_code_class[i] = EMACS_invalid_code; |
6933 | emacs_code_class[LEADING_CODE_PRIVATE_11] = EMACS_leading_code_3; | |
6934 | emacs_code_class[LEADING_CODE_PRIVATE_12] = EMACS_leading_code_3; | |
6935 | emacs_code_class[LEADING_CODE_PRIVATE_21] = EMACS_leading_code_4; | |
6936 | emacs_code_class[LEADING_CODE_PRIVATE_22] = EMACS_leading_code_4; | |
6937 | ||
6938 | /* ISO2022 specific initialize routine. */ | |
6939 | for (i = 0; i < 0x20; i++) | |
b73bfc1c | 6940 | iso_code_class[i] = ISO_control_0; |
4ed46869 KH |
6941 | for (i = 0x21; i < 0x7F; i++) |
6942 | iso_code_class[i] = ISO_graphic_plane_0; | |
6943 | for (i = 0x80; i < 0xA0; i++) | |
b73bfc1c | 6944 | iso_code_class[i] = ISO_control_1; |
4ed46869 KH |
6945 | for (i = 0xA1; i < 0xFF; i++) |
6946 | iso_code_class[i] = ISO_graphic_plane_1; | |
6947 | iso_code_class[0x20] = iso_code_class[0x7F] = ISO_0x20_or_0x7F; | |
6948 | iso_code_class[0xA0] = iso_code_class[0xFF] = ISO_0xA0_or_0xFF; | |
6949 | iso_code_class[ISO_CODE_CR] = ISO_carriage_return; | |
6950 | iso_code_class[ISO_CODE_SO] = ISO_shift_out; | |
6951 | iso_code_class[ISO_CODE_SI] = ISO_shift_in; | |
6952 | iso_code_class[ISO_CODE_SS2_7] = ISO_single_shift_2_7; | |
6953 | iso_code_class[ISO_CODE_ESC] = ISO_escape; | |
6954 | iso_code_class[ISO_CODE_SS2] = ISO_single_shift_2; | |
6955 | iso_code_class[ISO_CODE_SS3] = ISO_single_shift_3; | |
6956 | iso_code_class[ISO_CODE_CSI] = ISO_control_sequence_introducer; | |
6957 | ||
e0e989f6 KH |
6958 | setup_coding_system (Qnil, &keyboard_coding); |
6959 | setup_coding_system (Qnil, &terminal_coding); | |
c4825358 | 6960 | setup_coding_system (Qnil, &safe_terminal_coding); |
6bc51348 | 6961 | setup_coding_system (Qnil, &default_buffer_file_coding); |
9ce27fde | 6962 | |
d46c5b12 KH |
6963 | bzero (coding_system_table, sizeof coding_system_table); |
6964 | ||
66cfb530 KH |
6965 | bzero (ascii_skip_code, sizeof ascii_skip_code); |
6966 | for (i = 0; i < 128; i++) | |
6967 | ascii_skip_code[i] = 1; | |
6968 | ||
9ce27fde KH |
6969 | #if defined (MSDOS) || defined (WINDOWSNT) |
6970 | system_eol_type = CODING_EOL_CRLF; | |
6971 | #else | |
6972 | system_eol_type = CODING_EOL_LF; | |
6973 | #endif | |
b843d1ae KH |
6974 | |
6975 | inhibit_pre_post_conversion = 0; | |
e0e989f6 KH |
6976 | } |
6977 | ||
6978 | #ifdef emacs | |
6979 | ||
dfcf069d | 6980 | void |
e0e989f6 KH |
6981 | syms_of_coding () |
6982 | { | |
6983 | Qtarget_idx = intern ("target-idx"); | |
6984 | staticpro (&Qtarget_idx); | |
6985 | ||
bb0115a2 RS |
6986 | Qcoding_system_history = intern ("coding-system-history"); |
6987 | staticpro (&Qcoding_system_history); | |
6988 | Fset (Qcoding_system_history, Qnil); | |
6989 | ||
9ce27fde | 6990 | /* Target FILENAME is the first argument. */ |
e0e989f6 | 6991 | Fput (Qinsert_file_contents, Qtarget_idx, make_number (0)); |
9ce27fde | 6992 | /* Target FILENAME is the third argument. */ |
e0e989f6 KH |
6993 | Fput (Qwrite_region, Qtarget_idx, make_number (2)); |
6994 | ||
6995 | Qcall_process = intern ("call-process"); | |
6996 | staticpro (&Qcall_process); | |
9ce27fde | 6997 | /* Target PROGRAM is the first argument. */ |
e0e989f6 KH |
6998 | Fput (Qcall_process, Qtarget_idx, make_number (0)); |
6999 | ||
7000 | Qcall_process_region = intern ("call-process-region"); | |
7001 | staticpro (&Qcall_process_region); | |
9ce27fde | 7002 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
7003 | Fput (Qcall_process_region, Qtarget_idx, make_number (2)); |
7004 | ||
7005 | Qstart_process = intern ("start-process"); | |
7006 | staticpro (&Qstart_process); | |
9ce27fde | 7007 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
7008 | Fput (Qstart_process, Qtarget_idx, make_number (2)); |
7009 | ||
7010 | Qopen_network_stream = intern ("open-network-stream"); | |
7011 | staticpro (&Qopen_network_stream); | |
9ce27fde | 7012 | /* Target SERVICE is the fourth argument. */ |
e0e989f6 KH |
7013 | Fput (Qopen_network_stream, Qtarget_idx, make_number (3)); |
7014 | ||
4ed46869 KH |
7015 | Qcoding_system = intern ("coding-system"); |
7016 | staticpro (&Qcoding_system); | |
7017 | ||
7018 | Qeol_type = intern ("eol-type"); | |
7019 | staticpro (&Qeol_type); | |
7020 | ||
7021 | Qbuffer_file_coding_system = intern ("buffer-file-coding-system"); | |
7022 | staticpro (&Qbuffer_file_coding_system); | |
7023 | ||
7024 | Qpost_read_conversion = intern ("post-read-conversion"); | |
7025 | staticpro (&Qpost_read_conversion); | |
7026 | ||
7027 | Qpre_write_conversion = intern ("pre-write-conversion"); | |
7028 | staticpro (&Qpre_write_conversion); | |
7029 | ||
27901516 KH |
7030 | Qno_conversion = intern ("no-conversion"); |
7031 | staticpro (&Qno_conversion); | |
7032 | ||
7033 | Qundecided = intern ("undecided"); | |
7034 | staticpro (&Qundecided); | |
7035 | ||
4ed46869 KH |
7036 | Qcoding_system_p = intern ("coding-system-p"); |
7037 | staticpro (&Qcoding_system_p); | |
7038 | ||
7039 | Qcoding_system_error = intern ("coding-system-error"); | |
7040 | staticpro (&Qcoding_system_error); | |
7041 | ||
7042 | Fput (Qcoding_system_error, Qerror_conditions, | |
7043 | Fcons (Qcoding_system_error, Fcons (Qerror, Qnil))); | |
7044 | Fput (Qcoding_system_error, Qerror_message, | |
9ce27fde | 7045 | build_string ("Invalid coding system")); |
4ed46869 | 7046 | |
d46c5b12 KH |
7047 | Qcoding_category = intern ("coding-category"); |
7048 | staticpro (&Qcoding_category); | |
4ed46869 KH |
7049 | Qcoding_category_index = intern ("coding-category-index"); |
7050 | staticpro (&Qcoding_category_index); | |
7051 | ||
d46c5b12 KH |
7052 | Vcoding_category_table |
7053 | = Fmake_vector (make_number (CODING_CATEGORY_IDX_MAX), Qnil); | |
7054 | staticpro (&Vcoding_category_table); | |
4ed46869 KH |
7055 | { |
7056 | int i; | |
7057 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
7058 | { | |
d46c5b12 KH |
7059 | XVECTOR (Vcoding_category_table)->contents[i] |
7060 | = intern (coding_category_name[i]); | |
7061 | Fput (XVECTOR (Vcoding_category_table)->contents[i], | |
7062 | Qcoding_category_index, make_number (i)); | |
4ed46869 KH |
7063 | } |
7064 | } | |
7065 | ||
f967223b KH |
7066 | Qtranslation_table = intern ("translation-table"); |
7067 | staticpro (&Qtranslation_table); | |
1397dc18 | 7068 | Fput (Qtranslation_table, Qchar_table_extra_slots, make_number (1)); |
bdd9fb48 | 7069 | |
f967223b KH |
7070 | Qtranslation_table_id = intern ("translation-table-id"); |
7071 | staticpro (&Qtranslation_table_id); | |
84fbb8a0 | 7072 | |
f967223b KH |
7073 | Qtranslation_table_for_decode = intern ("translation-table-for-decode"); |
7074 | staticpro (&Qtranslation_table_for_decode); | |
a5d301df | 7075 | |
f967223b KH |
7076 | Qtranslation_table_for_encode = intern ("translation-table-for-encode"); |
7077 | staticpro (&Qtranslation_table_for_encode); | |
a5d301df | 7078 | |
05e6f5dc KH |
7079 | Qsafe_chars = intern ("safe-chars"); |
7080 | staticpro (&Qsafe_chars); | |
7081 | ||
7082 | Qchar_coding_system = intern ("char-coding-system"); | |
7083 | staticpro (&Qchar_coding_system); | |
7084 | ||
7085 | /* Intern this now in case it isn't already done. | |
7086 | Setting this variable twice is harmless. | |
7087 | But don't staticpro it here--that is done in alloc.c. */ | |
7088 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
7089 | Fput (Qsafe_chars, Qchar_table_extra_slots, make_number (0)); | |
7090 | Fput (Qchar_coding_system, Qchar_table_extra_slots, make_number (1)); | |
70c22245 | 7091 | |
1397dc18 KH |
7092 | Qvalid_codes = intern ("valid-codes"); |
7093 | staticpro (&Qvalid_codes); | |
7094 | ||
9ce27fde KH |
7095 | Qemacs_mule = intern ("emacs-mule"); |
7096 | staticpro (&Qemacs_mule); | |
7097 | ||
d46c5b12 KH |
7098 | Qraw_text = intern ("raw-text"); |
7099 | staticpro (&Qraw_text); | |
7100 | ||
4ed46869 KH |
7101 | defsubr (&Scoding_system_p); |
7102 | defsubr (&Sread_coding_system); | |
7103 | defsubr (&Sread_non_nil_coding_system); | |
7104 | defsubr (&Scheck_coding_system); | |
7105 | defsubr (&Sdetect_coding_region); | |
d46c5b12 | 7106 | defsubr (&Sdetect_coding_string); |
05e6f5dc | 7107 | defsubr (&Sfind_coding_systems_region_internal); |
4ed46869 KH |
7108 | defsubr (&Sdecode_coding_region); |
7109 | defsubr (&Sencode_coding_region); | |
7110 | defsubr (&Sdecode_coding_string); | |
7111 | defsubr (&Sencode_coding_string); | |
7112 | defsubr (&Sdecode_sjis_char); | |
7113 | defsubr (&Sencode_sjis_char); | |
7114 | defsubr (&Sdecode_big5_char); | |
7115 | defsubr (&Sencode_big5_char); | |
1ba9e4ab | 7116 | defsubr (&Sset_terminal_coding_system_internal); |
c4825358 | 7117 | defsubr (&Sset_safe_terminal_coding_system_internal); |
4ed46869 | 7118 | defsubr (&Sterminal_coding_system); |
1ba9e4ab | 7119 | defsubr (&Sset_keyboard_coding_system_internal); |
4ed46869 | 7120 | defsubr (&Skeyboard_coding_system); |
a5d301df | 7121 | defsubr (&Sfind_operation_coding_system); |
1397dc18 | 7122 | defsubr (&Supdate_coding_systems_internal); |
66cfb530 | 7123 | defsubr (&Sset_coding_priority_internal); |
4ed46869 | 7124 | |
4608c386 KH |
7125 | DEFVAR_LISP ("coding-system-list", &Vcoding_system_list, |
7126 | "List of coding systems.\n\ | |
7127 | \n\ | |
7128 | Do not alter the value of this variable manually. This variable should be\n\ | |
7129 | updated by the functions `make-coding-system' and\n\ | |
7130 | `define-coding-system-alias'."); | |
7131 | Vcoding_system_list = Qnil; | |
7132 | ||
7133 | DEFVAR_LISP ("coding-system-alist", &Vcoding_system_alist, | |
7134 | "Alist of coding system names.\n\ | |
7135 | Each element is one element list of coding system name.\n\ | |
7136 | This variable is given to `completing-read' as TABLE argument.\n\ | |
7137 | \n\ | |
7138 | Do not alter the value of this variable manually. This variable should be\n\ | |
7139 | updated by the functions `make-coding-system' and\n\ | |
7140 | `define-coding-system-alias'."); | |
7141 | Vcoding_system_alist = Qnil; | |
7142 | ||
4ed46869 | 7143 | DEFVAR_LISP ("coding-category-list", &Vcoding_category_list, |
2f4b4b44 KH |
7144 | "List of coding-categories (symbols) ordered by priority.\n\ |
7145 | \n\ | |
7146 | On detecting a coding system, Emacs tries code detection algorithms\n\ | |
7147 | associated with each coding-category one by one in this order. When\n\ | |
7148 | one algorithm agrees with a byte sequence of source text, the coding\n\ | |
7149 | system bound to the corresponding coding-category is selected."); | |
4ed46869 KH |
7150 | { |
7151 | int i; | |
7152 | ||
7153 | Vcoding_category_list = Qnil; | |
7154 | for (i = CODING_CATEGORY_IDX_MAX - 1; i >= 0; i--) | |
7155 | Vcoding_category_list | |
d46c5b12 KH |
7156 | = Fcons (XVECTOR (Vcoding_category_table)->contents[i], |
7157 | Vcoding_category_list); | |
4ed46869 KH |
7158 | } |
7159 | ||
7160 | DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read, | |
10bff6f1 | 7161 | "Specify the coding system for read operations.\n\ |
2ebb362d | 7162 | It is useful to bind this variable with `let', but do not set it globally.\n\ |
4ed46869 | 7163 | If the value is a coding system, it is used for decoding on read operation.\n\ |
a67a9c66 | 7164 | If not, an appropriate element is used from one of the coding system alists:\n\ |
10bff6f1 | 7165 | There are three such tables, `file-coding-system-alist',\n\ |
a67a9c66 | 7166 | `process-coding-system-alist', and `network-coding-system-alist'."); |
4ed46869 KH |
7167 | Vcoding_system_for_read = Qnil; |
7168 | ||
7169 | DEFVAR_LISP ("coding-system-for-write", &Vcoding_system_for_write, | |
10bff6f1 | 7170 | "Specify the coding system for write operations.\n\ |
928aedd8 RS |
7171 | Programs bind this variable with `let', but you should not set it globally.\n\ |
7172 | If the value is a coding system, it is used for encoding of output,\n\ | |
7173 | when writing it to a file and when sending it to a file or subprocess.\n\ | |
7174 | \n\ | |
7175 | If this does not specify a coding system, an appropriate element\n\ | |
7176 | is used from one of the coding system alists:\n\ | |
10bff6f1 | 7177 | There are three such tables, `file-coding-system-alist',\n\ |
928aedd8 RS |
7178 | `process-coding-system-alist', and `network-coding-system-alist'.\n\ |
7179 | For output to files, if the above procedure does not specify a coding system,\n\ | |
7180 | the value of `buffer-file-coding-system' is used."); | |
4ed46869 KH |
7181 | Vcoding_system_for_write = Qnil; |
7182 | ||
7183 | DEFVAR_LISP ("last-coding-system-used", &Vlast_coding_system_used, | |
a67a9c66 | 7184 | "Coding system used in the latest file or process I/O."); |
4ed46869 KH |
7185 | Vlast_coding_system_used = Qnil; |
7186 | ||
9ce27fde | 7187 | DEFVAR_BOOL ("inhibit-eol-conversion", &inhibit_eol_conversion, |
f07f4a24 | 7188 | "*Non-nil means always inhibit code conversion of end-of-line format.\n\ |
94c7a214 DL |
7189 | See info node `Coding Systems' and info node `Text and Binary' concerning\n\ |
7190 | such conversion."); | |
9ce27fde KH |
7191 | inhibit_eol_conversion = 0; |
7192 | ||
ed29121d EZ |
7193 | DEFVAR_BOOL ("inherit-process-coding-system", &inherit_process_coding_system, |
7194 | "Non-nil means process buffer inherits coding system of process output.\n\ | |
7195 | Bind it to t if the process output is to be treated as if it were a file\n\ | |
7196 | read from some filesystem."); | |
7197 | inherit_process_coding_system = 0; | |
7198 | ||
02ba4723 KH |
7199 | DEFVAR_LISP ("file-coding-system-alist", &Vfile_coding_system_alist, |
7200 | "Alist to decide a coding system to use for a file I/O operation.\n\ | |
7201 | The format is ((PATTERN . VAL) ...),\n\ | |
7202 | where PATTERN is a regular expression matching a file name,\n\ | |
7203 | VAL is a coding system, a cons of coding systems, or a function symbol.\n\ | |
7204 | If VAL is a coding system, it is used for both decoding and encoding\n\ | |
7205 | the file contents.\n\ | |
7206 | If VAL is a cons of coding systems, the car part is used for decoding,\n\ | |
7207 | and the cdr part is used for encoding.\n\ | |
7208 | If VAL is a function symbol, the function must return a coding system\n\ | |
7209 | or a cons of coding systems which are used as above.\n\ | |
e0e989f6 | 7210 | \n\ |
a85a871a | 7211 | See also the function `find-operation-coding-system'\n\ |
eda284ac | 7212 | and the variable `auto-coding-alist'."); |
02ba4723 KH |
7213 | Vfile_coding_system_alist = Qnil; |
7214 | ||
7215 | DEFVAR_LISP ("process-coding-system-alist", &Vprocess_coding_system_alist, | |
7216 | "Alist to decide a coding system to use for a process I/O operation.\n\ | |
7217 | The format is ((PATTERN . VAL) ...),\n\ | |
7218 | where PATTERN is a regular expression matching a program name,\n\ | |
7219 | VAL is a coding system, a cons of coding systems, or a function symbol.\n\ | |
7220 | If VAL is a coding system, it is used for both decoding what received\n\ | |
7221 | from the program and encoding what sent to the program.\n\ | |
7222 | If VAL is a cons of coding systems, the car part is used for decoding,\n\ | |
7223 | and the cdr part is used for encoding.\n\ | |
7224 | If VAL is a function symbol, the function must return a coding system\n\ | |
7225 | or a cons of coding systems which are used as above.\n\ | |
4ed46869 | 7226 | \n\ |
9ce27fde | 7227 | See also the function `find-operation-coding-system'."); |
02ba4723 KH |
7228 | Vprocess_coding_system_alist = Qnil; |
7229 | ||
7230 | DEFVAR_LISP ("network-coding-system-alist", &Vnetwork_coding_system_alist, | |
7231 | "Alist to decide a coding system to use for a network I/O operation.\n\ | |
7232 | The format is ((PATTERN . VAL) ...),\n\ | |
7233 | where PATTERN is a regular expression matching a network service name\n\ | |
7234 | or is a port number to connect to,\n\ | |
7235 | VAL is a coding system, a cons of coding systems, or a function symbol.\n\ | |
7236 | If VAL is a coding system, it is used for both decoding what received\n\ | |
7237 | from the network stream and encoding what sent to the network stream.\n\ | |
7238 | If VAL is a cons of coding systems, the car part is used for decoding,\n\ | |
7239 | and the cdr part is used for encoding.\n\ | |
7240 | If VAL is a function symbol, the function must return a coding system\n\ | |
7241 | or a cons of coding systems which are used as above.\n\ | |
4ed46869 | 7242 | \n\ |
9ce27fde | 7243 | See also the function `find-operation-coding-system'."); |
02ba4723 | 7244 | Vnetwork_coding_system_alist = Qnil; |
4ed46869 | 7245 | |
68c45bf0 PE |
7246 | DEFVAR_LISP ("locale-coding-system", &Vlocale_coding_system, |
7247 | "Coding system to use with system messages."); | |
7248 | Vlocale_coding_system = Qnil; | |
7249 | ||
005f0d35 | 7250 | /* The eol mnemonics are reset in startup.el system-dependently. */ |
7722baf9 EZ |
7251 | DEFVAR_LISP ("eol-mnemonic-unix", &eol_mnemonic_unix, |
7252 | "*String displayed in mode line for UNIX-like (LF) end-of-line format."); | |
7253 | eol_mnemonic_unix = build_string (":"); | |
4ed46869 | 7254 | |
7722baf9 EZ |
7255 | DEFVAR_LISP ("eol-mnemonic-dos", &eol_mnemonic_dos, |
7256 | "*String displayed in mode line for DOS-like (CRLF) end-of-line format."); | |
7257 | eol_mnemonic_dos = build_string ("\\"); | |
4ed46869 | 7258 | |
7722baf9 EZ |
7259 | DEFVAR_LISP ("eol-mnemonic-mac", &eol_mnemonic_mac, |
7260 | "*String displayed in mode line for MAC-like (CR) end-of-line format."); | |
7261 | eol_mnemonic_mac = build_string ("/"); | |
4ed46869 | 7262 | |
7722baf9 EZ |
7263 | DEFVAR_LISP ("eol-mnemonic-undecided", &eol_mnemonic_undecided, |
7264 | "*String displayed in mode line when end-of-line format is not yet determined."); | |
7265 | eol_mnemonic_undecided = build_string (":"); | |
4ed46869 | 7266 | |
84fbb8a0 | 7267 | DEFVAR_LISP ("enable-character-translation", &Venable_character_translation, |
f967223b | 7268 | "*Non-nil enables character translation while encoding and decoding."); |
84fbb8a0 | 7269 | Venable_character_translation = Qt; |
bdd9fb48 | 7270 | |
f967223b KH |
7271 | DEFVAR_LISP ("standard-translation-table-for-decode", |
7272 | &Vstandard_translation_table_for_decode, | |
84fbb8a0 | 7273 | "Table for translating characters while decoding."); |
f967223b | 7274 | Vstandard_translation_table_for_decode = Qnil; |
bdd9fb48 | 7275 | |
f967223b KH |
7276 | DEFVAR_LISP ("standard-translation-table-for-encode", |
7277 | &Vstandard_translation_table_for_encode, | |
8ca3766a | 7278 | "Table for translating characters while encoding."); |
f967223b | 7279 | Vstandard_translation_table_for_encode = Qnil; |
4ed46869 KH |
7280 | |
7281 | DEFVAR_LISP ("charset-revision-table", &Vcharset_revision_alist, | |
7282 | "Alist of charsets vs revision numbers.\n\ | |
7283 | While encoding, if a charset (car part of an element) is found,\n\ | |
8ca3766a | 7284 | designate it with the escape sequence identifying revision (cdr part of the element)."); |
4ed46869 | 7285 | Vcharset_revision_alist = Qnil; |
02ba4723 KH |
7286 | |
7287 | DEFVAR_LISP ("default-process-coding-system", | |
7288 | &Vdefault_process_coding_system, | |
7289 | "Cons of coding systems used for process I/O by default.\n\ | |
7290 | The car part is used for decoding a process output,\n\ | |
7291 | the cdr part is used for encoding a text to be sent to a process."); | |
7292 | Vdefault_process_coding_system = Qnil; | |
c4825358 | 7293 | |
3f003981 KH |
7294 | DEFVAR_LISP ("latin-extra-code-table", &Vlatin_extra_code_table, |
7295 | "Table of extra Latin codes in the range 128..159 (inclusive).\n\ | |
c4825358 KH |
7296 | This is a vector of length 256.\n\ |
7297 | If Nth element is non-nil, the existence of code N in a file\n\ | |
bb0115a2 | 7298 | \(or output of subprocess) doesn't prevent it to be detected as\n\ |
3f003981 KH |
7299 | a coding system of ISO 2022 variant which has a flag\n\ |
7300 | `accept-latin-extra-code' t (e.g. iso-latin-1) on reading a file\n\ | |
c4825358 KH |
7301 | or reading output of a subprocess.\n\ |
7302 | Only 128th through 159th elements has a meaning."); | |
3f003981 | 7303 | Vlatin_extra_code_table = Fmake_vector (make_number (256), Qnil); |
d46c5b12 KH |
7304 | |
7305 | DEFVAR_LISP ("select-safe-coding-system-function", | |
7306 | &Vselect_safe_coding_system_function, | |
7307 | "Function to call to select safe coding system for encoding a text.\n\ | |
7308 | \n\ | |
7309 | If set, this function is called to force a user to select a proper\n\ | |
7310 | coding system which can encode the text in the case that a default\n\ | |
7311 | coding system used in each operation can't encode the text.\n\ | |
7312 | \n\ | |
a85a871a | 7313 | The default value is `select-safe-coding-system' (which see)."); |
d46c5b12 KH |
7314 | Vselect_safe_coding_system_function = Qnil; |
7315 | ||
05e6f5dc KH |
7316 | DEFVAR_LISP ("char-coding-system-table", &Vchar_coding_system_table, |
7317 | "Char-table containing safe coding systems of each characters.\n\ | |
7318 | Each element doesn't include such generic coding systems that can\n\ | |
7319 | encode any characters. They are in the first extra slot."); | |
7320 | Vchar_coding_system_table = Fmake_char_table (Qchar_coding_system, Qnil); | |
7321 | ||
22ab2303 | 7322 | DEFVAR_BOOL ("inhibit-iso-escape-detection", |
74383408 KH |
7323 | &inhibit_iso_escape_detection, |
7324 | "If non-nil, Emacs ignores ISO2022's escape sequence on code detection.\n\ | |
7325 | \n\ | |
7326 | By default, on reading a file, Emacs tries to detect how the text is\n\ | |
7327 | encoded. This code detection is sensitive to escape sequences. If\n\ | |
e215fa58 EZ |
7328 | the sequence is valid as ISO2022, the code is determined as one of\n\ |
7329 | the ISO2022 encodings, and the file is decoded by the corresponding\n\ | |
7330 | coding system (e.g. `iso-2022-7bit').\n\ | |
74383408 KH |
7331 | \n\ |
7332 | However, there may be a case that you want to read escape sequences in\n\ | |
7333 | a file as is. In such a case, you can set this variable to non-nil.\n\ | |
7334 | Then, as the code detection ignores any escape sequences, no file is\n\ | |
e215fa58 EZ |
7335 | detected as encoded in some ISO2022 encoding. The result is that all\n\ |
7336 | escape sequences become visible in a buffer.\n\ | |
74383408 KH |
7337 | \n\ |
7338 | The default value is nil, and it is strongly recommended not to change\n\ | |
7339 | it. That is because many Emacs Lisp source files that contain\n\ | |
7340 | non-ASCII characters are encoded by the coding system `iso-2022-7bit'\n\ | |
7341 | in Emacs's distribution, and they won't be decoded correctly on\n\ | |
e215fa58 | 7342 | reading if you suppress escape sequence detection.\n\ |
74383408 KH |
7343 | \n\ |
7344 | The other way to read escape sequences in a file without decoding is\n\ | |
e215fa58 | 7345 | to explicitly specify some coding system that doesn't use ISO2022's\n\ |
74383408 KH |
7346 | escape sequence (e.g `latin-1') on reading by \\[universal-coding-system-argument]."); |
7347 | inhibit_iso_escape_detection = 0; | |
4ed46869 KH |
7348 | } |
7349 | ||
68c45bf0 PE |
7350 | char * |
7351 | emacs_strerror (error_number) | |
7352 | int error_number; | |
7353 | { | |
7354 | char *str; | |
7355 | ||
ca9c0567 | 7356 | synchronize_system_messages_locale (); |
68c45bf0 PE |
7357 | str = strerror (error_number); |
7358 | ||
7359 | if (! NILP (Vlocale_coding_system)) | |
7360 | { | |
7361 | Lisp_Object dec = code_convert_string_norecord (build_string (str), | |
7362 | Vlocale_coding_system, | |
7363 | 0); | |
7364 | str = (char *) XSTRING (dec)->data; | |
7365 | } | |
7366 | ||
7367 | return str; | |
7368 | } | |
7369 | ||
4ed46869 | 7370 | #endif /* emacs */ |
c2f94ebc | 7371 |