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4ed46869 | 1 | /* Coding system handler (conversion, detection, and etc). |
ff955d90 | 2 | Copyright (C) 1995, 1997, 1998, 2002 Electrotechnical Laboratory, JAPAN. |
203cb916 | 3 | Licensed to the Free Software Foundation. |
ea9d458b | 4 | Copyright (C) 2001,2002 Free Software Foundation, Inc. |
4ed46869 | 5 | |
369314dc KH |
6 | This file is part of GNU Emacs. |
7 | ||
8 | GNU Emacs is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
4ed46869 | 12 | |
369314dc KH |
13 | GNU Emacs is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
4ed46869 | 17 | |
369314dc KH |
18 | You should have received a copy of the GNU General Public License |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
20 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
4ed46869 KH |
22 | |
23 | /*** TABLE OF CONTENTS *** | |
24 | ||
b73bfc1c | 25 | 0. General comments |
4ed46869 | 26 | 1. Preamble |
0ef69138 | 27 | 2. Emacs' internal format (emacs-mule) handlers |
4ed46869 KH |
28 | 3. ISO2022 handlers |
29 | 4. Shift-JIS and BIG5 handlers | |
1397dc18 KH |
30 | 5. CCL handlers |
31 | 6. End-of-line handlers | |
32 | 7. C library functions | |
33 | 8. Emacs Lisp library functions | |
34 | 9. Post-amble | |
4ed46869 KH |
35 | |
36 | */ | |
37 | ||
b73bfc1c KH |
38 | /*** 0. General comments ***/ |
39 | ||
40 | ||
cfb43547 | 41 | /*** GENERAL NOTE on CODING SYSTEMS *** |
4ed46869 | 42 | |
cfb43547 | 43 | A coding system is an encoding mechanism for one or more character |
4ed46869 KH |
44 | sets. Here's a list of coding systems which Emacs can handle. When |
45 | we say "decode", it means converting some other coding system to | |
cfb43547 | 46 | Emacs' internal format (emacs-mule), and when we say "encode", |
0ef69138 KH |
47 | it means converting the coding system emacs-mule to some other |
48 | coding system. | |
4ed46869 | 49 | |
0ef69138 | 50 | 0. Emacs' internal format (emacs-mule) |
4ed46869 | 51 | |
cfb43547 | 52 | Emacs itself holds a multi-lingual character in buffers and strings |
f4dee582 | 53 | in a special format. Details are described in section 2. |
4ed46869 KH |
54 | |
55 | 1. ISO2022 | |
56 | ||
57 | The most famous coding system for multiple character sets. X's | |
f4dee582 RS |
58 | Compound Text, various EUCs (Extended Unix Code), and coding |
59 | systems used in Internet communication such as ISO-2022-JP are | |
60 | all variants of ISO2022. Details are described in section 3. | |
4ed46869 KH |
61 | |
62 | 2. SJIS (or Shift-JIS or MS-Kanji-Code) | |
93dec019 | 63 | |
4ed46869 KH |
64 | A coding system to encode character sets: ASCII, JISX0201, and |
65 | JISX0208. Widely used for PC's in Japan. Details are described in | |
f4dee582 | 66 | section 4. |
4ed46869 KH |
67 | |
68 | 3. BIG5 | |
69 | ||
cfb43547 DL |
70 | A coding system to encode the character sets ASCII and Big5. Widely |
71 | used for Chinese (mainly in Taiwan and Hong Kong). Details are | |
f4dee582 RS |
72 | described in section 4. In this file, when we write "BIG5" |
73 | (all uppercase), we mean the coding system, and when we write | |
74 | "Big5" (capitalized), we mean the character set. | |
4ed46869 | 75 | |
27901516 KH |
76 | 4. Raw text |
77 | ||
cfb43547 DL |
78 | A coding system for text containing random 8-bit code. Emacs does |
79 | no code conversion on such text except for end-of-line format. | |
27901516 KH |
80 | |
81 | 5. Other | |
4ed46869 | 82 | |
cfb43547 DL |
83 | If a user wants to read/write text encoded in a coding system not |
84 | listed above, he can supply a decoder and an encoder for it as CCL | |
4ed46869 KH |
85 | (Code Conversion Language) programs. Emacs executes the CCL program |
86 | while reading/writing. | |
87 | ||
d46c5b12 KH |
88 | Emacs represents a coding system by a Lisp symbol that has a property |
89 | `coding-system'. But, before actually using the coding system, the | |
4ed46869 | 90 | information about it is set in a structure of type `struct |
f4dee582 | 91 | coding_system' for rapid processing. See section 6 for more details. |
4ed46869 KH |
92 | |
93 | */ | |
94 | ||
95 | /*** GENERAL NOTES on END-OF-LINE FORMAT *** | |
96 | ||
cfb43547 DL |
97 | How end-of-line of text is encoded depends on the operating system. |
98 | For instance, Unix's format is just one byte of `line-feed' code, | |
f4dee582 | 99 | whereas DOS's format is two-byte sequence of `carriage-return' and |
d46c5b12 KH |
100 | `line-feed' codes. MacOS's format is usually one byte of |
101 | `carriage-return'. | |
4ed46869 | 102 | |
cfb43547 DL |
103 | Since text character encoding and end-of-line encoding are |
104 | independent, any coding system described above can have any | |
105 | end-of-line format. So Emacs has information about end-of-line | |
106 | format in each coding-system. See section 6 for more details. | |
4ed46869 KH |
107 | |
108 | */ | |
109 | ||
110 | /*** GENERAL NOTES on `detect_coding_XXX ()' functions *** | |
111 | ||
112 | These functions check if a text between SRC and SRC_END is encoded | |
113 | in the coding system category XXX. Each returns an integer value in | |
cfb43547 | 114 | which appropriate flag bits for the category XXX are set. The flag |
4ed46869 | 115 | bits are defined in macros CODING_CATEGORY_MASK_XXX. Below is the |
cfb43547 | 116 | template for these functions. If MULTIBYTEP is nonzero, 8-bit codes |
0a28aafb | 117 | of the range 0x80..0x9F are in multibyte form. */ |
4ed46869 KH |
118 | #if 0 |
119 | int | |
0a28aafb | 120 | detect_coding_emacs_mule (src, src_end, multibytep) |
4ed46869 | 121 | unsigned char *src, *src_end; |
0a28aafb | 122 | int multibytep; |
4ed46869 KH |
123 | { |
124 | ... | |
125 | } | |
126 | #endif | |
127 | ||
128 | /*** GENERAL NOTES on `decode_coding_XXX ()' functions *** | |
129 | ||
b73bfc1c KH |
130 | These functions decode SRC_BYTES length of unibyte text at SOURCE |
131 | encoded in CODING to Emacs' internal format. The resulting | |
132 | multibyte text goes to a place pointed to by DESTINATION, the length | |
133 | of which should not exceed DST_BYTES. | |
d46c5b12 | 134 | |
cfb43547 DL |
135 | These functions set the information about original and decoded texts |
136 | in the members `produced', `produced_char', `consumed', and | |
137 | `consumed_char' of the structure *CODING. They also set the member | |
138 | `result' to one of CODING_FINISH_XXX indicating how the decoding | |
139 | finished. | |
d46c5b12 | 140 | |
cfb43547 | 141 | DST_BYTES zero means that the source area and destination area are |
d46c5b12 | 142 | overlapped, which means that we can produce a decoded text until it |
cfb43547 | 143 | reaches the head of the not-yet-decoded source text. |
d46c5b12 | 144 | |
cfb43547 | 145 | Below is a template for these functions. */ |
4ed46869 | 146 | #if 0 |
b73bfc1c | 147 | static void |
d46c5b12 | 148 | decode_coding_XXX (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
149 | struct coding_system *coding; |
150 | unsigned char *source, *destination; | |
151 | int src_bytes, dst_bytes; | |
4ed46869 KH |
152 | { |
153 | ... | |
154 | } | |
155 | #endif | |
156 | ||
157 | /*** GENERAL NOTES on `encode_coding_XXX ()' functions *** | |
158 | ||
cfb43547 | 159 | These functions encode SRC_BYTES length text at SOURCE from Emacs' |
b73bfc1c KH |
160 | internal multibyte format to CODING. The resulting unibyte text |
161 | goes to a place pointed to by DESTINATION, the length of which | |
162 | should not exceed DST_BYTES. | |
d46c5b12 | 163 | |
cfb43547 DL |
164 | These functions set the information about original and encoded texts |
165 | in the members `produced', `produced_char', `consumed', and | |
166 | `consumed_char' of the structure *CODING. They also set the member | |
167 | `result' to one of CODING_FINISH_XXX indicating how the encoding | |
168 | finished. | |
d46c5b12 | 169 | |
cfb43547 DL |
170 | DST_BYTES zero means that the source area and destination area are |
171 | overlapped, which means that we can produce encoded text until it | |
172 | reaches at the head of the not-yet-encoded source text. | |
d46c5b12 | 173 | |
cfb43547 | 174 | Below is a template for these functions. */ |
4ed46869 | 175 | #if 0 |
b73bfc1c | 176 | static void |
d46c5b12 | 177 | encode_coding_XXX (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
178 | struct coding_system *coding; |
179 | unsigned char *source, *destination; | |
180 | int src_bytes, dst_bytes; | |
4ed46869 KH |
181 | { |
182 | ... | |
183 | } | |
184 | #endif | |
185 | ||
186 | /*** COMMONLY USED MACROS ***/ | |
187 | ||
b73bfc1c KH |
188 | /* The following two macros ONE_MORE_BYTE and TWO_MORE_BYTES safely |
189 | get one, two, and three bytes from the source text respectively. | |
190 | If there are not enough bytes in the source, they jump to | |
191 | `label_end_of_loop'. The caller should set variables `coding', | |
192 | `src' and `src_end' to appropriate pointer in advance. These | |
193 | macros are called from decoding routines `decode_coding_XXX', thus | |
194 | it is assumed that the source text is unibyte. */ | |
4ed46869 | 195 | |
b73bfc1c KH |
196 | #define ONE_MORE_BYTE(c1) \ |
197 | do { \ | |
198 | if (src >= src_end) \ | |
199 | { \ | |
200 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
201 | goto label_end_of_loop; \ | |
202 | } \ | |
203 | c1 = *src++; \ | |
4ed46869 KH |
204 | } while (0) |
205 | ||
b73bfc1c KH |
206 | #define TWO_MORE_BYTES(c1, c2) \ |
207 | do { \ | |
208 | if (src + 1 >= src_end) \ | |
209 | { \ | |
210 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
211 | goto label_end_of_loop; \ | |
212 | } \ | |
213 | c1 = *src++; \ | |
214 | c2 = *src++; \ | |
4ed46869 KH |
215 | } while (0) |
216 | ||
4ed46869 | 217 | |
0a28aafb KH |
218 | /* Like ONE_MORE_BYTE, but 8-bit bytes of data at SRC are in multibyte |
219 | form if MULTIBYTEP is nonzero. */ | |
220 | ||
221 | #define ONE_MORE_BYTE_CHECK_MULTIBYTE(c1, multibytep) \ | |
222 | do { \ | |
223 | if (src >= src_end) \ | |
224 | { \ | |
225 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
226 | goto label_end_of_loop; \ | |
227 | } \ | |
228 | c1 = *src++; \ | |
229 | if (multibytep && c1 == LEADING_CODE_8_BIT_CONTROL) \ | |
230 | c1 = *src++ - 0x20; \ | |
231 | } while (0) | |
232 | ||
b73bfc1c KH |
233 | /* Set C to the next character at the source text pointed by `src'. |
234 | If there are not enough characters in the source, jump to | |
235 | `label_end_of_loop'. The caller should set variables `coding' | |
236 | `src', `src_end', and `translation_table' to appropriate pointers | |
237 | in advance. This macro is used in encoding routines | |
238 | `encode_coding_XXX', thus it assumes that the source text is in | |
239 | multibyte form except for 8-bit characters. 8-bit characters are | |
240 | in multibyte form if coding->src_multibyte is nonzero, else they | |
241 | are represented by a single byte. */ | |
4ed46869 | 242 | |
b73bfc1c KH |
243 | #define ONE_MORE_CHAR(c) \ |
244 | do { \ | |
245 | int len = src_end - src; \ | |
246 | int bytes; \ | |
247 | if (len <= 0) \ | |
248 | { \ | |
249 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
250 | goto label_end_of_loop; \ | |
251 | } \ | |
252 | if (coding->src_multibyte \ | |
253 | || UNIBYTE_STR_AS_MULTIBYTE_P (src, len, bytes)) \ | |
254 | c = STRING_CHAR_AND_LENGTH (src, len, bytes); \ | |
255 | else \ | |
256 | c = *src, bytes = 1; \ | |
257 | if (!NILP (translation_table)) \ | |
39658efc | 258 | c = translate_char (translation_table, c, -1, 0, 0); \ |
b73bfc1c | 259 | src += bytes; \ |
4ed46869 KH |
260 | } while (0) |
261 | ||
4ed46869 | 262 | |
8ca3766a | 263 | /* Produce a multibyte form of character C to `dst'. Jump to |
b73bfc1c KH |
264 | `label_end_of_loop' if there's not enough space at `dst'. |
265 | ||
cfb43547 | 266 | If we are now in the middle of a composition sequence, the decoded |
b73bfc1c KH |
267 | character may be ALTCHAR (for the current composition). In that |
268 | case, the character goes to coding->cmp_data->data instead of | |
269 | `dst'. | |
270 | ||
271 | This macro is used in decoding routines. */ | |
272 | ||
273 | #define EMIT_CHAR(c) \ | |
4ed46869 | 274 | do { \ |
b73bfc1c KH |
275 | if (! COMPOSING_P (coding) \ |
276 | || coding->composing == COMPOSITION_RELATIVE \ | |
277 | || coding->composing == COMPOSITION_WITH_RULE) \ | |
278 | { \ | |
279 | int bytes = CHAR_BYTES (c); \ | |
280 | if ((dst + bytes) > (dst_bytes ? dst_end : src)) \ | |
281 | { \ | |
282 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
283 | goto label_end_of_loop; \ | |
284 | } \ | |
285 | dst += CHAR_STRING (c, dst); \ | |
286 | coding->produced_char++; \ | |
287 | } \ | |
ec6d2bb8 | 288 | \ |
b73bfc1c KH |
289 | if (COMPOSING_P (coding) \ |
290 | && coding->composing != COMPOSITION_RELATIVE) \ | |
291 | { \ | |
292 | CODING_ADD_COMPOSITION_COMPONENT (coding, c); \ | |
293 | coding->composition_rule_follows \ | |
294 | = coding->composing != COMPOSITION_WITH_ALTCHARS; \ | |
295 | } \ | |
4ed46869 KH |
296 | } while (0) |
297 | ||
4ed46869 | 298 | |
b73bfc1c KH |
299 | #define EMIT_ONE_BYTE(c) \ |
300 | do { \ | |
301 | if (dst >= (dst_bytes ? dst_end : src)) \ | |
302 | { \ | |
303 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
304 | goto label_end_of_loop; \ | |
305 | } \ | |
306 | *dst++ = c; \ | |
307 | } while (0) | |
308 | ||
309 | #define EMIT_TWO_BYTES(c1, c2) \ | |
310 | do { \ | |
311 | if (dst + 2 > (dst_bytes ? dst_end : src)) \ | |
312 | { \ | |
313 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
314 | goto label_end_of_loop; \ | |
315 | } \ | |
316 | *dst++ = c1, *dst++ = c2; \ | |
317 | } while (0) | |
318 | ||
319 | #define EMIT_BYTES(from, to) \ | |
320 | do { \ | |
321 | if (dst + (to - from) > (dst_bytes ? dst_end : src)) \ | |
322 | { \ | |
323 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
324 | goto label_end_of_loop; \ | |
325 | } \ | |
326 | while (from < to) \ | |
327 | *dst++ = *from++; \ | |
4ed46869 KH |
328 | } while (0) |
329 | ||
330 | \f | |
331 | /*** 1. Preamble ***/ | |
332 | ||
68c45bf0 PE |
333 | #ifdef emacs |
334 | #include <config.h> | |
335 | #endif | |
336 | ||
4ed46869 KH |
337 | #include <stdio.h> |
338 | ||
339 | #ifdef emacs | |
340 | ||
4ed46869 KH |
341 | #include "lisp.h" |
342 | #include "buffer.h" | |
343 | #include "charset.h" | |
ec6d2bb8 | 344 | #include "composite.h" |
4ed46869 KH |
345 | #include "ccl.h" |
346 | #include "coding.h" | |
347 | #include "window.h" | |
348 | ||
349 | #else /* not emacs */ | |
350 | ||
351 | #include "mulelib.h" | |
352 | ||
353 | #endif /* not emacs */ | |
354 | ||
355 | Lisp_Object Qcoding_system, Qeol_type; | |
356 | Lisp_Object Qbuffer_file_coding_system; | |
357 | Lisp_Object Qpost_read_conversion, Qpre_write_conversion; | |
27901516 | 358 | Lisp_Object Qno_conversion, Qundecided; |
bb0115a2 | 359 | Lisp_Object Qcoding_system_history; |
05e6f5dc | 360 | Lisp_Object Qsafe_chars; |
1397dc18 | 361 | Lisp_Object Qvalid_codes; |
4ed46869 KH |
362 | |
363 | extern Lisp_Object Qinsert_file_contents, Qwrite_region; | |
364 | Lisp_Object Qcall_process, Qcall_process_region, Qprocess_argument; | |
365 | Lisp_Object Qstart_process, Qopen_network_stream; | |
366 | Lisp_Object Qtarget_idx; | |
367 | ||
d46c5b12 KH |
368 | Lisp_Object Vselect_safe_coding_system_function; |
369 | ||
5d5bf4d8 KH |
370 | int coding_system_require_warning; |
371 | ||
7722baf9 EZ |
372 | /* Mnemonic string for each format of end-of-line. */ |
373 | Lisp_Object eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac; | |
374 | /* Mnemonic string to indicate format of end-of-line is not yet | |
4ed46869 | 375 | decided. */ |
7722baf9 | 376 | Lisp_Object eol_mnemonic_undecided; |
4ed46869 | 377 | |
9ce27fde KH |
378 | /* Format of end-of-line decided by system. This is CODING_EOL_LF on |
379 | Unix, CODING_EOL_CRLF on DOS/Windows, and CODING_EOL_CR on Mac. */ | |
380 | int system_eol_type; | |
381 | ||
4ed46869 KH |
382 | #ifdef emacs |
383 | ||
4608c386 KH |
384 | Lisp_Object Vcoding_system_list, Vcoding_system_alist; |
385 | ||
386 | Lisp_Object Qcoding_system_p, Qcoding_system_error; | |
4ed46869 | 387 | |
d46c5b12 KH |
388 | /* Coding system emacs-mule and raw-text are for converting only |
389 | end-of-line format. */ | |
390 | Lisp_Object Qemacs_mule, Qraw_text; | |
9ce27fde | 391 | |
4ed46869 KH |
392 | /* Coding-systems are handed between Emacs Lisp programs and C internal |
393 | routines by the following three variables. */ | |
394 | /* Coding-system for reading files and receiving data from process. */ | |
395 | Lisp_Object Vcoding_system_for_read; | |
396 | /* Coding-system for writing files and sending data to process. */ | |
397 | Lisp_Object Vcoding_system_for_write; | |
398 | /* Coding-system actually used in the latest I/O. */ | |
399 | Lisp_Object Vlast_coding_system_used; | |
400 | ||
c4825358 | 401 | /* A vector of length 256 which contains information about special |
94487c4e | 402 | Latin codes (especially for dealing with Microsoft codes). */ |
3f003981 | 403 | Lisp_Object Vlatin_extra_code_table; |
c4825358 | 404 | |
9ce27fde KH |
405 | /* Flag to inhibit code conversion of end-of-line format. */ |
406 | int inhibit_eol_conversion; | |
407 | ||
74383408 KH |
408 | /* Flag to inhibit ISO2022 escape sequence detection. */ |
409 | int inhibit_iso_escape_detection; | |
410 | ||
ed29121d EZ |
411 | /* Flag to make buffer-file-coding-system inherit from process-coding. */ |
412 | int inherit_process_coding_system; | |
413 | ||
c4825358 | 414 | /* Coding system to be used to encode text for terminal display. */ |
4ed46869 KH |
415 | struct coding_system terminal_coding; |
416 | ||
c4825358 KH |
417 | /* Coding system to be used to encode text for terminal display when |
418 | terminal coding system is nil. */ | |
419 | struct coding_system safe_terminal_coding; | |
420 | ||
421 | /* Coding system of what is sent from terminal keyboard. */ | |
4ed46869 KH |
422 | struct coding_system keyboard_coding; |
423 | ||
6bc51348 KH |
424 | /* Default coding system to be used to write a file. */ |
425 | struct coding_system default_buffer_file_coding; | |
426 | ||
02ba4723 KH |
427 | Lisp_Object Vfile_coding_system_alist; |
428 | Lisp_Object Vprocess_coding_system_alist; | |
429 | Lisp_Object Vnetwork_coding_system_alist; | |
4ed46869 | 430 | |
68c45bf0 PE |
431 | Lisp_Object Vlocale_coding_system; |
432 | ||
4ed46869 KH |
433 | #endif /* emacs */ |
434 | ||
d46c5b12 | 435 | Lisp_Object Qcoding_category, Qcoding_category_index; |
4ed46869 KH |
436 | |
437 | /* List of symbols `coding-category-xxx' ordered by priority. */ | |
438 | Lisp_Object Vcoding_category_list; | |
439 | ||
d46c5b12 KH |
440 | /* Table of coding categories (Lisp symbols). */ |
441 | Lisp_Object Vcoding_category_table; | |
4ed46869 KH |
442 | |
443 | /* Table of names of symbol for each coding-category. */ | |
444 | char *coding_category_name[CODING_CATEGORY_IDX_MAX] = { | |
0ef69138 | 445 | "coding-category-emacs-mule", |
4ed46869 KH |
446 | "coding-category-sjis", |
447 | "coding-category-iso-7", | |
d46c5b12 | 448 | "coding-category-iso-7-tight", |
4ed46869 KH |
449 | "coding-category-iso-8-1", |
450 | "coding-category-iso-8-2", | |
7717c392 KH |
451 | "coding-category-iso-7-else", |
452 | "coding-category-iso-8-else", | |
89fa8b36 | 453 | "coding-category-ccl", |
4ed46869 | 454 | "coding-category-big5", |
fa42c37f KH |
455 | "coding-category-utf-8", |
456 | "coding-category-utf-16-be", | |
457 | "coding-category-utf-16-le", | |
27901516 | 458 | "coding-category-raw-text", |
89fa8b36 | 459 | "coding-category-binary" |
4ed46869 KH |
460 | }; |
461 | ||
66cfb530 | 462 | /* Table of pointers to coding systems corresponding to each coding |
d46c5b12 KH |
463 | categories. */ |
464 | struct coding_system *coding_system_table[CODING_CATEGORY_IDX_MAX]; | |
465 | ||
66cfb530 | 466 | /* Table of coding category masks. Nth element is a mask for a coding |
8ca3766a | 467 | category of which priority is Nth. */ |
66cfb530 KH |
468 | static |
469 | int coding_priorities[CODING_CATEGORY_IDX_MAX]; | |
470 | ||
f967223b KH |
471 | /* Flag to tell if we look up translation table on character code |
472 | conversion. */ | |
84fbb8a0 | 473 | Lisp_Object Venable_character_translation; |
f967223b KH |
474 | /* Standard translation table to look up on decoding (reading). */ |
475 | Lisp_Object Vstandard_translation_table_for_decode; | |
476 | /* Standard translation table to look up on encoding (writing). */ | |
477 | Lisp_Object Vstandard_translation_table_for_encode; | |
84fbb8a0 | 478 | |
f967223b KH |
479 | Lisp_Object Qtranslation_table; |
480 | Lisp_Object Qtranslation_table_id; | |
481 | Lisp_Object Qtranslation_table_for_decode; | |
482 | Lisp_Object Qtranslation_table_for_encode; | |
4ed46869 KH |
483 | |
484 | /* Alist of charsets vs revision number. */ | |
485 | Lisp_Object Vcharset_revision_alist; | |
486 | ||
02ba4723 KH |
487 | /* Default coding systems used for process I/O. */ |
488 | Lisp_Object Vdefault_process_coding_system; | |
489 | ||
002fdb44 DL |
490 | /* Char table for translating Quail and self-inserting input. */ |
491 | Lisp_Object Vtranslation_table_for_input; | |
492 | ||
b843d1ae KH |
493 | /* Global flag to tell that we can't call post-read-conversion and |
494 | pre-write-conversion functions. Usually the value is zero, but it | |
495 | is set to 1 temporarily while such functions are running. This is | |
496 | to avoid infinite recursive call. */ | |
497 | static int inhibit_pre_post_conversion; | |
498 | ||
05e6f5dc KH |
499 | /* Char-table containing safe coding systems of each character. */ |
500 | Lisp_Object Vchar_coding_system_table; | |
501 | Lisp_Object Qchar_coding_system; | |
502 | ||
503 | /* Return `safe-chars' property of coding system CODING. Don't check | |
504 | validity of CODING. */ | |
505 | ||
506 | Lisp_Object | |
507 | coding_safe_chars (coding) | |
508 | struct coding_system *coding; | |
509 | { | |
510 | Lisp_Object coding_spec, plist, safe_chars; | |
93dec019 | 511 | |
05e6f5dc KH |
512 | coding_spec = Fget (coding->symbol, Qcoding_system); |
513 | plist = XVECTOR (coding_spec)->contents[3]; | |
514 | safe_chars = Fplist_get (XVECTOR (coding_spec)->contents[3], Qsafe_chars); | |
515 | return (CHAR_TABLE_P (safe_chars) ? safe_chars : Qt); | |
516 | } | |
517 | ||
518 | #define CODING_SAFE_CHAR_P(safe_chars, c) \ | |
519 | (EQ (safe_chars, Qt) || !NILP (CHAR_TABLE_REF (safe_chars, c))) | |
520 | ||
4ed46869 | 521 | \f |
0ef69138 | 522 | /*** 2. Emacs internal format (emacs-mule) handlers ***/ |
4ed46869 | 523 | |
aa72b389 KH |
524 | /* Emacs' internal format for representation of multiple character |
525 | sets is a kind of multi-byte encoding, i.e. characters are | |
526 | represented by variable-length sequences of one-byte codes. | |
b73bfc1c KH |
527 | |
528 | ASCII characters and control characters (e.g. `tab', `newline') are | |
529 | represented by one-byte sequences which are their ASCII codes, in | |
530 | the range 0x00 through 0x7F. | |
531 | ||
532 | 8-bit characters of the range 0x80..0x9F are represented by | |
533 | two-byte sequences of LEADING_CODE_8_BIT_CONTROL and (their 8-bit | |
534 | code + 0x20). | |
535 | ||
536 | 8-bit characters of the range 0xA0..0xFF are represented by | |
537 | one-byte sequences which are their 8-bit code. | |
538 | ||
539 | The other characters are represented by a sequence of `base | |
540 | leading-code', optional `extended leading-code', and one or two | |
541 | `position-code's. The length of the sequence is determined by the | |
aa72b389 | 542 | base leading-code. Leading-code takes the range 0x81 through 0x9D, |
b73bfc1c KH |
543 | whereas extended leading-code and position-code take the range 0xA0 |
544 | through 0xFF. See `charset.h' for more details about leading-code | |
545 | and position-code. | |
f4dee582 | 546 | |
4ed46869 | 547 | --- CODE RANGE of Emacs' internal format --- |
b73bfc1c KH |
548 | character set range |
549 | ------------- ----- | |
550 | ascii 0x00..0x7F | |
551 | eight-bit-control LEADING_CODE_8_BIT_CONTROL + 0xA0..0xBF | |
552 | eight-bit-graphic 0xA0..0xBF | |
aa72b389 | 553 | ELSE 0x81..0x9D + [0xA0..0xFF]+ |
4ed46869 KH |
554 | --------------------------------------------- |
555 | ||
aa72b389 KH |
556 | As this is the internal character representation, the format is |
557 | usually not used externally (i.e. in a file or in a data sent to a | |
558 | process). But, it is possible to have a text externally in this | |
559 | format (i.e. by encoding by the coding system `emacs-mule'). | |
560 | ||
561 | In that case, a sequence of one-byte codes has a slightly different | |
562 | form. | |
563 | ||
ae5145c2 | 564 | Firstly, all characters in eight-bit-control are represented by |
aa72b389 KH |
565 | one-byte sequences which are their 8-bit code. |
566 | ||
567 | Next, character composition data are represented by the byte | |
568 | sequence of the form: 0x80 METHOD BYTES CHARS COMPONENT ..., | |
569 | where, | |
570 | METHOD is 0xF0 plus one of composition method (enum | |
571 | composition_method), | |
572 | ||
ae5145c2 | 573 | BYTES is 0xA0 plus the byte length of these composition data, |
aa72b389 | 574 | |
ae5145c2 | 575 | CHARS is 0xA0 plus the number of characters composed by these |
aa72b389 KH |
576 | data, |
577 | ||
8ca3766a | 578 | COMPONENTs are characters of multibyte form or composition |
aa72b389 KH |
579 | rules encoded by two-byte of ASCII codes. |
580 | ||
581 | In addition, for backward compatibility, the following formats are | |
582 | also recognized as composition data on decoding. | |
583 | ||
584 | 0x80 MSEQ ... | |
585 | 0x80 0xFF MSEQ RULE MSEQ RULE ... MSEQ | |
586 | ||
587 | Here, | |
588 | MSEQ is a multibyte form but in these special format: | |
589 | ASCII: 0xA0 ASCII_CODE+0x80, | |
590 | other: LEADING_CODE+0x20 FOLLOWING-BYTE ..., | |
591 | RULE is a one byte code of the range 0xA0..0xF0 that | |
592 | represents a composition rule. | |
4ed46869 KH |
593 | */ |
594 | ||
595 | enum emacs_code_class_type emacs_code_class[256]; | |
596 | ||
4ed46869 KH |
597 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
598 | Check if a text is encoded in Emacs' internal format. If it is, | |
d46c5b12 | 599 | return CODING_CATEGORY_MASK_EMACS_MULE, else return 0. */ |
4ed46869 | 600 | |
0a28aafb KH |
601 | static int |
602 | detect_coding_emacs_mule (src, src_end, multibytep) | |
b73bfc1c | 603 | unsigned char *src, *src_end; |
0a28aafb | 604 | int multibytep; |
4ed46869 KH |
605 | { |
606 | unsigned char c; | |
607 | int composing = 0; | |
b73bfc1c KH |
608 | /* Dummy for ONE_MORE_BYTE. */ |
609 | struct coding_system dummy_coding; | |
610 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 611 | |
b73bfc1c | 612 | while (1) |
4ed46869 | 613 | { |
0a28aafb | 614 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
4ed46869 KH |
615 | |
616 | if (composing) | |
617 | { | |
618 | if (c < 0xA0) | |
619 | composing = 0; | |
b73bfc1c KH |
620 | else if (c == 0xA0) |
621 | { | |
0a28aafb | 622 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
b73bfc1c KH |
623 | c &= 0x7F; |
624 | } | |
4ed46869 KH |
625 | else |
626 | c -= 0x20; | |
627 | } | |
628 | ||
b73bfc1c | 629 | if (c < 0x20) |
4ed46869 | 630 | { |
4ed46869 KH |
631 | if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) |
632 | return 0; | |
b73bfc1c KH |
633 | } |
634 | else if (c >= 0x80 && c < 0xA0) | |
635 | { | |
636 | if (c == 0x80) | |
637 | /* Old leading code for a composite character. */ | |
638 | composing = 1; | |
639 | else | |
640 | { | |
641 | unsigned char *src_base = src - 1; | |
642 | int bytes; | |
4ed46869 | 643 | |
b73bfc1c KH |
644 | if (!UNIBYTE_STR_AS_MULTIBYTE_P (src_base, src_end - src_base, |
645 | bytes)) | |
646 | return 0; | |
647 | src = src_base + bytes; | |
648 | } | |
649 | } | |
650 | } | |
651 | label_end_of_loop: | |
652 | return CODING_CATEGORY_MASK_EMACS_MULE; | |
653 | } | |
4ed46869 | 654 | |
4ed46869 | 655 | |
aa72b389 KH |
656 | /* Record the starting position START and METHOD of one composition. */ |
657 | ||
658 | #define CODING_ADD_COMPOSITION_START(coding, start, method) \ | |
659 | do { \ | |
660 | struct composition_data *cmp_data = coding->cmp_data; \ | |
661 | int *data = cmp_data->data + cmp_data->used; \ | |
662 | coding->cmp_data_start = cmp_data->used; \ | |
663 | data[0] = -1; \ | |
664 | data[1] = cmp_data->char_offset + start; \ | |
665 | data[3] = (int) method; \ | |
666 | cmp_data->used += 4; \ | |
667 | } while (0) | |
668 | ||
669 | /* Record the ending position END of the current composition. */ | |
670 | ||
671 | #define CODING_ADD_COMPOSITION_END(coding, end) \ | |
672 | do { \ | |
673 | struct composition_data *cmp_data = coding->cmp_data; \ | |
674 | int *data = cmp_data->data + coding->cmp_data_start; \ | |
675 | data[0] = cmp_data->used - coding->cmp_data_start; \ | |
676 | data[2] = cmp_data->char_offset + end; \ | |
677 | } while (0) | |
678 | ||
679 | /* Record one COMPONENT (alternate character or composition rule). */ | |
680 | ||
681 | #define CODING_ADD_COMPOSITION_COMPONENT(coding, component) \ | |
682 | (coding->cmp_data->data[coding->cmp_data->used++] = component) | |
683 | ||
684 | ||
685 | /* Get one byte from a data pointed by SRC and increment SRC. If SRC | |
8ca3766a | 686 | is not less than SRC_END, return -1 without incrementing Src. */ |
aa72b389 KH |
687 | |
688 | #define SAFE_ONE_MORE_BYTE() (src >= src_end ? -1 : *src++) | |
689 | ||
690 | ||
691 | /* Decode a character represented as a component of composition | |
692 | sequence of Emacs 20 style at SRC. Set C to that character, store | |
693 | its multibyte form sequence at P, and set P to the end of that | |
694 | sequence. If no valid character is found, set C to -1. */ | |
695 | ||
696 | #define DECODE_EMACS_MULE_COMPOSITION_CHAR(c, p) \ | |
697 | do { \ | |
698 | int bytes; \ | |
699 | \ | |
700 | c = SAFE_ONE_MORE_BYTE (); \ | |
701 | if (c < 0) \ | |
702 | break; \ | |
703 | if (CHAR_HEAD_P (c)) \ | |
704 | c = -1; \ | |
705 | else if (c == 0xA0) \ | |
706 | { \ | |
707 | c = SAFE_ONE_MORE_BYTE (); \ | |
708 | if (c < 0xA0) \ | |
709 | c = -1; \ | |
710 | else \ | |
711 | { \ | |
712 | c -= 0xA0; \ | |
713 | *p++ = c; \ | |
714 | } \ | |
715 | } \ | |
716 | else if (BASE_LEADING_CODE_P (c - 0x20)) \ | |
717 | { \ | |
718 | unsigned char *p0 = p; \ | |
719 | \ | |
720 | c -= 0x20; \ | |
721 | *p++ = c; \ | |
722 | bytes = BYTES_BY_CHAR_HEAD (c); \ | |
723 | while (--bytes) \ | |
724 | { \ | |
725 | c = SAFE_ONE_MORE_BYTE (); \ | |
726 | if (c < 0) \ | |
727 | break; \ | |
728 | *p++ = c; \ | |
729 | } \ | |
730 | if (UNIBYTE_STR_AS_MULTIBYTE_P (p0, p - p0, bytes)) \ | |
731 | c = STRING_CHAR (p0, bytes); \ | |
732 | else \ | |
733 | c = -1; \ | |
734 | } \ | |
735 | else \ | |
736 | c = -1; \ | |
737 | } while (0) | |
738 | ||
739 | ||
740 | /* Decode a composition rule represented as a component of composition | |
741 | sequence of Emacs 20 style at SRC. Set C to the rule. If not | |
742 | valid rule is found, set C to -1. */ | |
743 | ||
744 | #define DECODE_EMACS_MULE_COMPOSITION_RULE(c) \ | |
745 | do { \ | |
746 | c = SAFE_ONE_MORE_BYTE (); \ | |
747 | c -= 0xA0; \ | |
748 | if (c < 0 || c >= 81) \ | |
749 | c = -1; \ | |
750 | else \ | |
751 | { \ | |
752 | gref = c / 9, nref = c % 9; \ | |
753 | c = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
754 | } \ | |
755 | } while (0) | |
756 | ||
757 | ||
758 | /* Decode composition sequence encoded by `emacs-mule' at the source | |
759 | pointed by SRC. SRC_END is the end of source. Store information | |
760 | of the composition in CODING->cmp_data. | |
761 | ||
762 | For backward compatibility, decode also a composition sequence of | |
763 | Emacs 20 style. In that case, the composition sequence contains | |
764 | characters that should be extracted into a buffer or string. Store | |
765 | those characters at *DESTINATION in multibyte form. | |
766 | ||
767 | If we encounter an invalid byte sequence, return 0. | |
768 | If we encounter an insufficient source or destination, or | |
769 | insufficient space in CODING->cmp_data, return 1. | |
770 | Otherwise, return consumed bytes in the source. | |
771 | ||
772 | */ | |
773 | static INLINE int | |
774 | decode_composition_emacs_mule (coding, src, src_end, | |
775 | destination, dst_end, dst_bytes) | |
776 | struct coding_system *coding; | |
777 | unsigned char *src, *src_end, **destination, *dst_end; | |
778 | int dst_bytes; | |
779 | { | |
780 | unsigned char *dst = *destination; | |
781 | int method, data_len, nchars; | |
782 | unsigned char *src_base = src++; | |
8ca3766a | 783 | /* Store components of composition. */ |
aa72b389 KH |
784 | int component[COMPOSITION_DATA_MAX_BUNCH_LENGTH]; |
785 | int ncomponent; | |
786 | /* Store multibyte form of characters to be composed. This is for | |
787 | Emacs 20 style composition sequence. */ | |
788 | unsigned char buf[MAX_COMPOSITION_COMPONENTS * MAX_MULTIBYTE_LENGTH]; | |
789 | unsigned char *bufp = buf; | |
790 | int c, i, gref, nref; | |
791 | ||
792 | if (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH | |
793 | >= COMPOSITION_DATA_SIZE) | |
794 | { | |
795 | coding->result = CODING_FINISH_INSUFFICIENT_CMP; | |
796 | return -1; | |
797 | } | |
798 | ||
799 | ONE_MORE_BYTE (c); | |
800 | if (c - 0xF0 >= COMPOSITION_RELATIVE | |
801 | && c - 0xF0 <= COMPOSITION_WITH_RULE_ALTCHARS) | |
802 | { | |
803 | int with_rule; | |
804 | ||
805 | method = c - 0xF0; | |
806 | with_rule = (method == COMPOSITION_WITH_RULE | |
807 | || method == COMPOSITION_WITH_RULE_ALTCHARS); | |
808 | ONE_MORE_BYTE (c); | |
809 | data_len = c - 0xA0; | |
810 | if (data_len < 4 | |
811 | || src_base + data_len > src_end) | |
812 | return 0; | |
813 | ONE_MORE_BYTE (c); | |
814 | nchars = c - 0xA0; | |
815 | if (c < 1) | |
816 | return 0; | |
817 | for (ncomponent = 0; src < src_base + data_len; ncomponent++) | |
818 | { | |
b1887814 RS |
819 | /* If it is longer than this, it can't be valid. */ |
820 | if (ncomponent >= COMPOSITION_DATA_MAX_BUNCH_LENGTH) | |
821 | return 0; | |
822 | ||
aa72b389 KH |
823 | if (ncomponent % 2 && with_rule) |
824 | { | |
825 | ONE_MORE_BYTE (gref); | |
826 | gref -= 32; | |
827 | ONE_MORE_BYTE (nref); | |
828 | nref -= 32; | |
829 | c = COMPOSITION_ENCODE_RULE (gref, nref); | |
830 | } | |
831 | else | |
832 | { | |
833 | int bytes; | |
834 | if (UNIBYTE_STR_AS_MULTIBYTE_P (src, src_end - src, bytes)) | |
835 | c = STRING_CHAR (src, bytes); | |
836 | else | |
837 | c = *src, bytes = 1; | |
838 | src += bytes; | |
839 | } | |
840 | component[ncomponent] = c; | |
841 | } | |
842 | } | |
843 | else | |
844 | { | |
845 | /* This may be an old Emacs 20 style format. See the comment at | |
846 | the section 2 of this file. */ | |
847 | while (src < src_end && !CHAR_HEAD_P (*src)) src++; | |
848 | if (src == src_end | |
849 | && !(coding->mode & CODING_MODE_LAST_BLOCK)) | |
850 | goto label_end_of_loop; | |
851 | ||
852 | src_end = src; | |
853 | src = src_base + 1; | |
854 | if (c < 0xC0) | |
855 | { | |
856 | method = COMPOSITION_RELATIVE; | |
857 | for (ncomponent = 0; ncomponent < MAX_COMPOSITION_COMPONENTS;) | |
858 | { | |
859 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
860 | if (c < 0) | |
861 | break; | |
862 | component[ncomponent++] = c; | |
863 | } | |
864 | if (ncomponent < 2) | |
865 | return 0; | |
866 | nchars = ncomponent; | |
867 | } | |
868 | else if (c == 0xFF) | |
869 | { | |
870 | method = COMPOSITION_WITH_RULE; | |
871 | src++; | |
872 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
873 | if (c < 0) | |
874 | return 0; | |
875 | component[0] = c; | |
876 | for (ncomponent = 1; | |
877 | ncomponent < MAX_COMPOSITION_COMPONENTS * 2 - 1;) | |
878 | { | |
879 | DECODE_EMACS_MULE_COMPOSITION_RULE (c); | |
880 | if (c < 0) | |
881 | break; | |
882 | component[ncomponent++] = c; | |
883 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
884 | if (c < 0) | |
885 | break; | |
886 | component[ncomponent++] = c; | |
887 | } | |
888 | if (ncomponent < 3) | |
889 | return 0; | |
890 | nchars = (ncomponent + 1) / 2; | |
891 | } | |
892 | else | |
893 | return 0; | |
894 | } | |
895 | ||
896 | if (buf == bufp || dst + (bufp - buf) <= (dst_bytes ? dst_end : src)) | |
897 | { | |
898 | CODING_ADD_COMPOSITION_START (coding, coding->produced_char, method); | |
899 | for (i = 0; i < ncomponent; i++) | |
900 | CODING_ADD_COMPOSITION_COMPONENT (coding, component[i]); | |
93dec019 | 901 | CODING_ADD_COMPOSITION_END (coding, coding->produced_char + nchars); |
aa72b389 KH |
902 | if (buf < bufp) |
903 | { | |
904 | unsigned char *p = buf; | |
905 | EMIT_BYTES (p, bufp); | |
906 | *destination += bufp - buf; | |
907 | coding->produced_char += nchars; | |
908 | } | |
909 | return (src - src_base); | |
910 | } | |
911 | label_end_of_loop: | |
912 | return -1; | |
913 | } | |
914 | ||
b73bfc1c | 915 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
4ed46869 | 916 | |
b73bfc1c KH |
917 | static void |
918 | decode_coding_emacs_mule (coding, source, destination, src_bytes, dst_bytes) | |
919 | struct coding_system *coding; | |
920 | unsigned char *source, *destination; | |
921 | int src_bytes, dst_bytes; | |
922 | { | |
923 | unsigned char *src = source; | |
924 | unsigned char *src_end = source + src_bytes; | |
925 | unsigned char *dst = destination; | |
926 | unsigned char *dst_end = destination + dst_bytes; | |
927 | /* SRC_BASE remembers the start position in source in each loop. | |
928 | The loop will be exited when there's not enough source code, or | |
929 | when there's not enough destination area to produce a | |
930 | character. */ | |
931 | unsigned char *src_base; | |
4ed46869 | 932 | |
b73bfc1c | 933 | coding->produced_char = 0; |
8a33cf7b | 934 | while ((src_base = src) < src_end) |
b73bfc1c KH |
935 | { |
936 | unsigned char tmp[MAX_MULTIBYTE_LENGTH], *p; | |
937 | int bytes; | |
ec6d2bb8 | 938 | |
4af310db EZ |
939 | if (*src == '\r') |
940 | { | |
2bcdf662 | 941 | int c = *src++; |
4af310db | 942 | |
4af310db EZ |
943 | if (coding->eol_type == CODING_EOL_CR) |
944 | c = '\n'; | |
945 | else if (coding->eol_type == CODING_EOL_CRLF) | |
946 | { | |
947 | ONE_MORE_BYTE (c); | |
948 | if (c != '\n') | |
949 | { | |
4af310db EZ |
950 | src--; |
951 | c = '\r'; | |
952 | } | |
953 | } | |
954 | *dst++ = c; | |
955 | coding->produced_char++; | |
956 | continue; | |
957 | } | |
958 | else if (*src == '\n') | |
959 | { | |
960 | if ((coding->eol_type == CODING_EOL_CR | |
961 | || coding->eol_type == CODING_EOL_CRLF) | |
962 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
963 | { | |
964 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
965 | goto label_end_of_loop; | |
966 | } | |
967 | *dst++ = *src++; | |
968 | coding->produced_char++; | |
969 | continue; | |
970 | } | |
3089d25c | 971 | else if (*src == 0x80 && coding->cmp_data) |
aa72b389 KH |
972 | { |
973 | /* Start of composition data. */ | |
974 | int consumed = decode_composition_emacs_mule (coding, src, src_end, | |
975 | &dst, dst_end, | |
976 | dst_bytes); | |
977 | if (consumed < 0) | |
978 | goto label_end_of_loop; | |
979 | else if (consumed > 0) | |
980 | { | |
981 | src += consumed; | |
982 | continue; | |
983 | } | |
984 | bytes = CHAR_STRING (*src, tmp); | |
985 | p = tmp; | |
986 | src++; | |
987 | } | |
4af310db | 988 | else if (UNIBYTE_STR_AS_MULTIBYTE_P (src, src_end - src, bytes)) |
b73bfc1c KH |
989 | { |
990 | p = src; | |
991 | src += bytes; | |
992 | } | |
993 | else | |
994 | { | |
995 | bytes = CHAR_STRING (*src, tmp); | |
996 | p = tmp; | |
997 | src++; | |
998 | } | |
999 | if (dst + bytes >= (dst_bytes ? dst_end : src)) | |
1000 | { | |
1001 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
4ed46869 KH |
1002 | break; |
1003 | } | |
b73bfc1c KH |
1004 | while (bytes--) *dst++ = *p++; |
1005 | coding->produced_char++; | |
4ed46869 | 1006 | } |
4af310db | 1007 | label_end_of_loop: |
b73bfc1c KH |
1008 | coding->consumed = coding->consumed_char = src_base - source; |
1009 | coding->produced = dst - destination; | |
4ed46869 KH |
1010 | } |
1011 | ||
b73bfc1c | 1012 | |
aa72b389 KH |
1013 | /* Encode composition data stored at DATA into a special byte sequence |
1014 | starting by 0x80. Update CODING->cmp_data_start and maybe | |
1015 | CODING->cmp_data for the next call. */ | |
1016 | ||
1017 | #define ENCODE_COMPOSITION_EMACS_MULE(coding, data) \ | |
1018 | do { \ | |
1019 | unsigned char buf[1024], *p0 = buf, *p; \ | |
1020 | int len = data[0]; \ | |
1021 | int i; \ | |
1022 | \ | |
1023 | buf[0] = 0x80; \ | |
1024 | buf[1] = 0xF0 + data[3]; /* METHOD */ \ | |
1025 | buf[3] = 0xA0 + (data[2] - data[1]); /* COMPOSED-CHARS */ \ | |
1026 | p = buf + 4; \ | |
1027 | if (data[3] == COMPOSITION_WITH_RULE \ | |
1028 | || data[3] == COMPOSITION_WITH_RULE_ALTCHARS) \ | |
1029 | { \ | |
1030 | p += CHAR_STRING (data[4], p); \ | |
1031 | for (i = 5; i < len; i += 2) \ | |
1032 | { \ | |
1033 | int gref, nref; \ | |
1034 | COMPOSITION_DECODE_RULE (data[i], gref, nref); \ | |
1035 | *p++ = 0x20 + gref; \ | |
1036 | *p++ = 0x20 + nref; \ | |
1037 | p += CHAR_STRING (data[i + 1], p); \ | |
1038 | } \ | |
1039 | } \ | |
1040 | else \ | |
1041 | { \ | |
1042 | for (i = 4; i < len; i++) \ | |
1043 | p += CHAR_STRING (data[i], p); \ | |
1044 | } \ | |
1045 | buf[2] = 0xA0 + (p - buf); /* COMPONENTS-BYTES */ \ | |
1046 | \ | |
1047 | if (dst + (p - buf) + 4 > (dst_bytes ? dst_end : src)) \ | |
1048 | { \ | |
1049 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
1050 | goto label_end_of_loop; \ | |
1051 | } \ | |
1052 | while (p0 < p) \ | |
1053 | *dst++ = *p0++; \ | |
1054 | coding->cmp_data_start += data[0]; \ | |
1055 | if (coding->cmp_data_start == coding->cmp_data->used \ | |
1056 | && coding->cmp_data->next) \ | |
1057 | { \ | |
1058 | coding->cmp_data = coding->cmp_data->next; \ | |
1059 | coding->cmp_data_start = 0; \ | |
1060 | } \ | |
1061 | } while (0) | |
93dec019 | 1062 | |
aa72b389 | 1063 | |
a4244313 | 1064 | static void encode_eol P_ ((struct coding_system *, const unsigned char *, |
aa72b389 KH |
1065 | unsigned char *, int, int)); |
1066 | ||
1067 | static void | |
1068 | encode_coding_emacs_mule (coding, source, destination, src_bytes, dst_bytes) | |
1069 | struct coding_system *coding; | |
1070 | unsigned char *source, *destination; | |
1071 | int src_bytes, dst_bytes; | |
1072 | { | |
1073 | unsigned char *src = source; | |
1074 | unsigned char *src_end = source + src_bytes; | |
1075 | unsigned char *dst = destination; | |
1076 | unsigned char *dst_end = destination + dst_bytes; | |
1077 | unsigned char *src_base; | |
1078 | int c; | |
1079 | int char_offset; | |
1080 | int *data; | |
1081 | ||
1082 | Lisp_Object translation_table; | |
1083 | ||
1084 | translation_table = Qnil; | |
1085 | ||
1086 | /* Optimization for the case that there's no composition. */ | |
1087 | if (!coding->cmp_data || coding->cmp_data->used == 0) | |
1088 | { | |
1089 | encode_eol (coding, source, destination, src_bytes, dst_bytes); | |
1090 | return; | |
1091 | } | |
1092 | ||
1093 | char_offset = coding->cmp_data->char_offset; | |
1094 | data = coding->cmp_data->data + coding->cmp_data_start; | |
1095 | while (1) | |
1096 | { | |
1097 | src_base = src; | |
1098 | ||
1099 | /* If SRC starts a composition, encode the information about the | |
1100 | composition in advance. */ | |
1101 | if (coding->cmp_data_start < coding->cmp_data->used | |
1102 | && char_offset + coding->consumed_char == data[1]) | |
1103 | { | |
1104 | ENCODE_COMPOSITION_EMACS_MULE (coding, data); | |
1105 | char_offset = coding->cmp_data->char_offset; | |
1106 | data = coding->cmp_data->data + coding->cmp_data_start; | |
1107 | } | |
1108 | ||
1109 | ONE_MORE_CHAR (c); | |
1110 | if (c == '\n' && (coding->eol_type == CODING_EOL_CRLF | |
1111 | || coding->eol_type == CODING_EOL_CR)) | |
1112 | { | |
1113 | if (coding->eol_type == CODING_EOL_CRLF) | |
1114 | EMIT_TWO_BYTES ('\r', c); | |
1115 | else | |
1116 | EMIT_ONE_BYTE ('\r'); | |
1117 | } | |
1118 | else if (SINGLE_BYTE_CHAR_P (c)) | |
1119 | EMIT_ONE_BYTE (c); | |
1120 | else | |
1121 | EMIT_BYTES (src_base, src); | |
1122 | coding->consumed_char++; | |
1123 | } | |
1124 | label_end_of_loop: | |
1125 | coding->consumed = src_base - source; | |
1126 | coding->produced = coding->produced_char = dst - destination; | |
1127 | return; | |
1128 | } | |
b73bfc1c | 1129 | |
4ed46869 KH |
1130 | \f |
1131 | /*** 3. ISO2022 handlers ***/ | |
1132 | ||
1133 | /* The following note describes the coding system ISO2022 briefly. | |
39787efd | 1134 | Since the intention of this note is to help understand the |
cfb43547 | 1135 | functions in this file, some parts are NOT ACCURATE or are OVERLY |
39787efd | 1136 | SIMPLIFIED. For thorough understanding, please refer to the |
cfb43547 DL |
1137 | original document of ISO2022. This is equivalent to the standard |
1138 | ECMA-35, obtainable from <URL:http://www.ecma.ch/> (*). | |
4ed46869 KH |
1139 | |
1140 | ISO2022 provides many mechanisms to encode several character sets | |
cfb43547 | 1141 | in 7-bit and 8-bit environments. For 7-bit environments, all text |
39787efd KH |
1142 | is encoded using bytes less than 128. This may make the encoded |
1143 | text a little bit longer, but the text passes more easily through | |
cfb43547 | 1144 | several types of gateway, some of which strip off the MSB (Most |
8ca3766a | 1145 | Significant Bit). |
b73bfc1c | 1146 | |
cfb43547 DL |
1147 | There are two kinds of character sets: control character sets and |
1148 | graphic character sets. The former contain control characters such | |
4ed46869 | 1149 | as `newline' and `escape' to provide control functions (control |
39787efd | 1150 | functions are also provided by escape sequences). The latter |
cfb43547 | 1151 | contain graphic characters such as 'A' and '-'. Emacs recognizes |
4ed46869 KH |
1152 | two control character sets and many graphic character sets. |
1153 | ||
1154 | Graphic character sets are classified into one of the following | |
39787efd KH |
1155 | four classes, according to the number of bytes (DIMENSION) and |
1156 | number of characters in one dimension (CHARS) of the set: | |
1157 | - DIMENSION1_CHARS94 | |
1158 | - DIMENSION1_CHARS96 | |
1159 | - DIMENSION2_CHARS94 | |
1160 | - DIMENSION2_CHARS96 | |
1161 | ||
1162 | In addition, each character set is assigned an identification tag, | |
cfb43547 | 1163 | unique for each set, called the "final character" (denoted as <F> |
39787efd KH |
1164 | hereafter). The <F> of each character set is decided by ECMA(*) |
1165 | when it is registered in ISO. The code range of <F> is 0x30..0x7F | |
1166 | (0x30..0x3F are for private use only). | |
4ed46869 KH |
1167 | |
1168 | Note (*): ECMA = European Computer Manufacturers Association | |
1169 | ||
cfb43547 | 1170 | Here are examples of graphic character sets [NAME(<F>)]: |
4ed46869 KH |
1171 | o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ... |
1172 | o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ... | |
1173 | o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ... | |
1174 | o DIMENSION2_CHARS96 -- none for the moment | |
1175 | ||
39787efd | 1176 | A code area (1 byte=8 bits) is divided into 4 areas, C0, GL, C1, and GR. |
4ed46869 KH |
1177 | C0 [0x00..0x1F] -- control character plane 0 |
1178 | GL [0x20..0x7F] -- graphic character plane 0 | |
1179 | C1 [0x80..0x9F] -- control character plane 1 | |
1180 | GR [0xA0..0xFF] -- graphic character plane 1 | |
1181 | ||
1182 | A control character set is directly designated and invoked to C0 or | |
39787efd KH |
1183 | C1 by an escape sequence. The most common case is that: |
1184 | - ISO646's control character set is designated/invoked to C0, and | |
1185 | - ISO6429's control character set is designated/invoked to C1, | |
1186 | and usually these designations/invocations are omitted in encoded | |
1187 | text. In a 7-bit environment, only C0 can be used, and a control | |
1188 | character for C1 is encoded by an appropriate escape sequence to | |
1189 | fit into the environment. All control characters for C1 are | |
1190 | defined to have corresponding escape sequences. | |
4ed46869 KH |
1191 | |
1192 | A graphic character set is at first designated to one of four | |
1193 | graphic registers (G0 through G3), then these graphic registers are | |
1194 | invoked to GL or GR. These designations and invocations can be | |
1195 | done independently. The most common case is that G0 is invoked to | |
39787efd KH |
1196 | GL, G1 is invoked to GR, and ASCII is designated to G0. Usually |
1197 | these invocations and designations are omitted in encoded text. | |
1198 | In a 7-bit environment, only GL can be used. | |
4ed46869 | 1199 | |
39787efd KH |
1200 | When a graphic character set of CHARS94 is invoked to GL, codes |
1201 | 0x20 and 0x7F of the GL area work as control characters SPACE and | |
1202 | DEL respectively, and codes 0xA0 and 0xFF of the GR area should not | |
1203 | be used. | |
4ed46869 KH |
1204 | |
1205 | There are two ways of invocation: locking-shift and single-shift. | |
1206 | With locking-shift, the invocation lasts until the next different | |
39787efd KH |
1207 | invocation, whereas with single-shift, the invocation affects the |
1208 | following character only and doesn't affect the locking-shift | |
1209 | state. Invocations are done by the following control characters or | |
1210 | escape sequences: | |
4ed46869 KH |
1211 | |
1212 | ---------------------------------------------------------------------- | |
39787efd | 1213 | abbrev function cntrl escape seq description |
4ed46869 | 1214 | ---------------------------------------------------------------------- |
39787efd KH |
1215 | SI/LS0 (shift-in) 0x0F none invoke G0 into GL |
1216 | SO/LS1 (shift-out) 0x0E none invoke G1 into GL | |
1217 | LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL | |
1218 | LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL | |
1219 | LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*) | |
1220 | LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*) | |
1221 | LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*) | |
1222 | SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char | |
1223 | SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char | |
4ed46869 | 1224 | ---------------------------------------------------------------------- |
39787efd KH |
1225 | (*) These are not used by any known coding system. |
1226 | ||
1227 | Control characters for these functions are defined by macros | |
1228 | ISO_CODE_XXX in `coding.h'. | |
4ed46869 | 1229 | |
39787efd | 1230 | Designations are done by the following escape sequences: |
4ed46869 KH |
1231 | ---------------------------------------------------------------------- |
1232 | escape sequence description | |
1233 | ---------------------------------------------------------------------- | |
1234 | ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0 | |
1235 | ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1 | |
1236 | ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2 | |
1237 | ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3 | |
1238 | ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*) | |
1239 | ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1 | |
1240 | ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2 | |
1241 | ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3 | |
1242 | ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**) | |
1243 | ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1 | |
1244 | ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2 | |
1245 | ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3 | |
1246 | ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*) | |
1247 | ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1 | |
1248 | ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2 | |
1249 | ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3 | |
1250 | ---------------------------------------------------------------------- | |
1251 | ||
1252 | In this list, "DIMENSION1_CHARS94<F>" means a graphic character set | |
39787efd | 1253 | of dimension 1, chars 94, and final character <F>, etc... |
4ed46869 KH |
1254 | |
1255 | Note (*): Although these designations are not allowed in ISO2022, | |
1256 | Emacs accepts them on decoding, and produces them on encoding | |
39787efd | 1257 | CHARS96 character sets in a coding system which is characterized as |
4ed46869 KH |
1258 | 7-bit environment, non-locking-shift, and non-single-shift. |
1259 | ||
1260 | Note (**): If <F> is '@', 'A', or 'B', the intermediate character | |
39787efd | 1261 | '(' can be omitted. We refer to this as "short-form" hereafter. |
4ed46869 | 1262 | |
cfb43547 | 1263 | Now you may notice that there are a lot of ways of encoding the |
39787efd KH |
1264 | same multilingual text in ISO2022. Actually, there exist many |
1265 | coding systems such as Compound Text (used in X11's inter client | |
8ca3766a DL |
1266 | communication, ISO-2022-JP (used in Japanese Internet), ISO-2022-KR |
1267 | (used in Korean Internet), EUC (Extended UNIX Code, used in Asian | |
4ed46869 KH |
1268 | localized platforms), and all of these are variants of ISO2022. |
1269 | ||
1270 | In addition to the above, Emacs handles two more kinds of escape | |
1271 | sequences: ISO6429's direction specification and Emacs' private | |
1272 | sequence for specifying character composition. | |
1273 | ||
39787efd | 1274 | ISO6429's direction specification takes the following form: |
4ed46869 KH |
1275 | o CSI ']' -- end of the current direction |
1276 | o CSI '0' ']' -- end of the current direction | |
1277 | o CSI '1' ']' -- start of left-to-right text | |
1278 | o CSI '2' ']' -- start of right-to-left text | |
1279 | The control character CSI (0x9B: control sequence introducer) is | |
39787efd KH |
1280 | abbreviated to the escape sequence ESC '[' in a 7-bit environment. |
1281 | ||
1282 | Character composition specification takes the following form: | |
ec6d2bb8 KH |
1283 | o ESC '0' -- start relative composition |
1284 | o ESC '1' -- end composition | |
1285 | o ESC '2' -- start rule-base composition (*) | |
1286 | o ESC '3' -- start relative composition with alternate chars (**) | |
1287 | o ESC '4' -- start rule-base composition with alternate chars (**) | |
b73bfc1c | 1288 | Since these are not standard escape sequences of any ISO standard, |
cfb43547 | 1289 | the use of them with these meanings is restricted to Emacs only. |
ec6d2bb8 | 1290 | |
cfb43547 | 1291 | (*) This form is used only in Emacs 20.5 and older versions, |
b73bfc1c | 1292 | but the newer versions can safely decode it. |
cfb43547 | 1293 | (**) This form is used only in Emacs 21.1 and newer versions, |
b73bfc1c | 1294 | and the older versions can't decode it. |
ec6d2bb8 | 1295 | |
cfb43547 | 1296 | Here's a list of example usages of these composition escape |
b73bfc1c | 1297 | sequences (categorized by `enum composition_method'). |
ec6d2bb8 | 1298 | |
b73bfc1c | 1299 | COMPOSITION_RELATIVE: |
ec6d2bb8 | 1300 | ESC 0 CHAR [ CHAR ] ESC 1 |
8ca3766a | 1301 | COMPOSITION_WITH_RULE: |
ec6d2bb8 | 1302 | ESC 2 CHAR [ RULE CHAR ] ESC 1 |
b73bfc1c | 1303 | COMPOSITION_WITH_ALTCHARS: |
ec6d2bb8 | 1304 | ESC 3 ALTCHAR [ ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 |
b73bfc1c | 1305 | COMPOSITION_WITH_RULE_ALTCHARS: |
ec6d2bb8 | 1306 | ESC 4 ALTCHAR [ RULE ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 */ |
4ed46869 KH |
1307 | |
1308 | enum iso_code_class_type iso_code_class[256]; | |
1309 | ||
05e6f5dc KH |
1310 | #define CHARSET_OK(idx, charset, c) \ |
1311 | (coding_system_table[idx] \ | |
1312 | && (charset == CHARSET_ASCII \ | |
1313 | || (safe_chars = coding_safe_chars (coding_system_table[idx]), \ | |
1314 | CODING_SAFE_CHAR_P (safe_chars, c))) \ | |
1315 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding_system_table[idx], \ | |
1316 | charset) \ | |
1317 | != CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION)) | |
d46c5b12 KH |
1318 | |
1319 | #define SHIFT_OUT_OK(idx) \ | |
1320 | (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding_system_table[idx], 1) >= 0) | |
1321 | ||
4ed46869 | 1322 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
cfb43547 | 1323 | Check if a text is encoded in ISO2022. If it is, return an |
4ed46869 KH |
1324 | integer in which appropriate flag bits any of: |
1325 | CODING_CATEGORY_MASK_ISO_7 | |
d46c5b12 | 1326 | CODING_CATEGORY_MASK_ISO_7_TIGHT |
4ed46869 KH |
1327 | CODING_CATEGORY_MASK_ISO_8_1 |
1328 | CODING_CATEGORY_MASK_ISO_8_2 | |
7717c392 KH |
1329 | CODING_CATEGORY_MASK_ISO_7_ELSE |
1330 | CODING_CATEGORY_MASK_ISO_8_ELSE | |
4ed46869 KH |
1331 | are set. If a code which should never appear in ISO2022 is found, |
1332 | returns 0. */ | |
1333 | ||
0a28aafb KH |
1334 | static int |
1335 | detect_coding_iso2022 (src, src_end, multibytep) | |
4ed46869 | 1336 | unsigned char *src, *src_end; |
0a28aafb | 1337 | int multibytep; |
4ed46869 | 1338 | { |
d46c5b12 KH |
1339 | int mask = CODING_CATEGORY_MASK_ISO; |
1340 | int mask_found = 0; | |
f46869e4 | 1341 | int reg[4], shift_out = 0, single_shifting = 0; |
da55a2b7 | 1342 | int c, c1, charset; |
b73bfc1c KH |
1343 | /* Dummy for ONE_MORE_BYTE. */ |
1344 | struct coding_system dummy_coding; | |
1345 | struct coding_system *coding = &dummy_coding; | |
05e6f5dc | 1346 | Lisp_Object safe_chars; |
3f003981 | 1347 | |
d46c5b12 | 1348 | reg[0] = CHARSET_ASCII, reg[1] = reg[2] = reg[3] = -1; |
3f003981 | 1349 | while (mask && src < src_end) |
4ed46869 | 1350 | { |
0a28aafb | 1351 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
8d239c89 | 1352 | retry: |
4ed46869 KH |
1353 | switch (c) |
1354 | { | |
1355 | case ISO_CODE_ESC: | |
74383408 KH |
1356 | if (inhibit_iso_escape_detection) |
1357 | break; | |
f46869e4 | 1358 | single_shifting = 0; |
0a28aafb | 1359 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
d46c5b12 | 1360 | if (c >= '(' && c <= '/') |
4ed46869 | 1361 | { |
bf9cdd4e | 1362 | /* Designation sequence for a charset of dimension 1. */ |
0a28aafb | 1363 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
d46c5b12 KH |
1364 | if (c1 < ' ' || c1 >= 0x80 |
1365 | || (charset = iso_charset_table[0][c >= ','][c1]) < 0) | |
1366 | /* Invalid designation sequence. Just ignore. */ | |
1367 | break; | |
1368 | reg[(c - '(') % 4] = charset; | |
bf9cdd4e KH |
1369 | } |
1370 | else if (c == '$') | |
1371 | { | |
1372 | /* Designation sequence for a charset of dimension 2. */ | |
0a28aafb | 1373 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
bf9cdd4e KH |
1374 | if (c >= '@' && c <= 'B') |
1375 | /* Designation for JISX0208.1978, GB2312, or JISX0208. */ | |
d46c5b12 | 1376 | reg[0] = charset = iso_charset_table[1][0][c]; |
bf9cdd4e | 1377 | else if (c >= '(' && c <= '/') |
bcf26d6a | 1378 | { |
0a28aafb | 1379 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
d46c5b12 KH |
1380 | if (c1 < ' ' || c1 >= 0x80 |
1381 | || (charset = iso_charset_table[1][c >= ','][c1]) < 0) | |
1382 | /* Invalid designation sequence. Just ignore. */ | |
1383 | break; | |
1384 | reg[(c - '(') % 4] = charset; | |
bcf26d6a | 1385 | } |
bf9cdd4e | 1386 | else |
d46c5b12 KH |
1387 | /* Invalid designation sequence. Just ignore. */ |
1388 | break; | |
1389 | } | |
ae9ff118 | 1390 | else if (c == 'N' || c == 'O') |
d46c5b12 | 1391 | { |
ae9ff118 KH |
1392 | /* ESC <Fe> for SS2 or SS3. */ |
1393 | mask &= CODING_CATEGORY_MASK_ISO_7_ELSE; | |
d46c5b12 | 1394 | break; |
4ed46869 | 1395 | } |
ec6d2bb8 KH |
1396 | else if (c >= '0' && c <= '4') |
1397 | { | |
1398 | /* ESC <Fp> for start/end composition. */ | |
1399 | mask_found |= CODING_CATEGORY_MASK_ISO; | |
1400 | break; | |
1401 | } | |
bf9cdd4e | 1402 | else |
d46c5b12 KH |
1403 | /* Invalid escape sequence. Just ignore. */ |
1404 | break; | |
1405 | ||
1406 | /* We found a valid designation sequence for CHARSET. */ | |
1407 | mask &= ~CODING_CATEGORY_MASK_ISO_8BIT; | |
05e6f5dc KH |
1408 | c = MAKE_CHAR (charset, 0, 0); |
1409 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7, charset, c)) | |
d46c5b12 KH |
1410 | mask_found |= CODING_CATEGORY_MASK_ISO_7; |
1411 | else | |
1412 | mask &= ~CODING_CATEGORY_MASK_ISO_7; | |
05e6f5dc | 1413 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_TIGHT, charset, c)) |
d46c5b12 KH |
1414 | mask_found |= CODING_CATEGORY_MASK_ISO_7_TIGHT; |
1415 | else | |
1416 | mask &= ~CODING_CATEGORY_MASK_ISO_7_TIGHT; | |
05e6f5dc | 1417 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_ELSE, charset, c)) |
ae9ff118 KH |
1418 | mask_found |= CODING_CATEGORY_MASK_ISO_7_ELSE; |
1419 | else | |
d46c5b12 | 1420 | mask &= ~CODING_CATEGORY_MASK_ISO_7_ELSE; |
05e6f5dc | 1421 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_8_ELSE, charset, c)) |
ae9ff118 KH |
1422 | mask_found |= CODING_CATEGORY_MASK_ISO_8_ELSE; |
1423 | else | |
d46c5b12 | 1424 | mask &= ~CODING_CATEGORY_MASK_ISO_8_ELSE; |
4ed46869 KH |
1425 | break; |
1426 | ||
4ed46869 | 1427 | case ISO_CODE_SO: |
74383408 KH |
1428 | if (inhibit_iso_escape_detection) |
1429 | break; | |
f46869e4 | 1430 | single_shifting = 0; |
d46c5b12 KH |
1431 | if (shift_out == 0 |
1432 | && (reg[1] >= 0 | |
1433 | || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_7_ELSE) | |
1434 | || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_8_ELSE))) | |
1435 | { | |
1436 | /* Locking shift out. */ | |
1437 | mask &= ~CODING_CATEGORY_MASK_ISO_7BIT; | |
1438 | mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT; | |
1439 | } | |
e0e989f6 | 1440 | break; |
93dec019 | 1441 | |
d46c5b12 | 1442 | case ISO_CODE_SI: |
74383408 KH |
1443 | if (inhibit_iso_escape_detection) |
1444 | break; | |
f46869e4 | 1445 | single_shifting = 0; |
d46c5b12 KH |
1446 | if (shift_out == 1) |
1447 | { | |
1448 | /* Locking shift in. */ | |
1449 | mask &= ~CODING_CATEGORY_MASK_ISO_7BIT; | |
1450 | mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT; | |
1451 | } | |
1452 | break; | |
1453 | ||
4ed46869 | 1454 | case ISO_CODE_CSI: |
f46869e4 | 1455 | single_shifting = 0; |
4ed46869 KH |
1456 | case ISO_CODE_SS2: |
1457 | case ISO_CODE_SS3: | |
3f003981 KH |
1458 | { |
1459 | int newmask = CODING_CATEGORY_MASK_ISO_8_ELSE; | |
1460 | ||
74383408 KH |
1461 | if (inhibit_iso_escape_detection) |
1462 | break; | |
70c22245 KH |
1463 | if (c != ISO_CODE_CSI) |
1464 | { | |
d46c5b12 KH |
1465 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1466 | & CODING_FLAG_ISO_SINGLE_SHIFT) | |
70c22245 | 1467 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1468 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1469 | & CODING_FLAG_ISO_SINGLE_SHIFT) | |
70c22245 | 1470 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
f46869e4 | 1471 | single_shifting = 1; |
70c22245 | 1472 | } |
3f003981 KH |
1473 | if (VECTORP (Vlatin_extra_code_table) |
1474 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
1475 | { | |
d46c5b12 KH |
1476 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1477 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 | 1478 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1479 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1480 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 KH |
1481 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
1482 | } | |
1483 | mask &= newmask; | |
d46c5b12 | 1484 | mask_found |= newmask; |
3f003981 KH |
1485 | } |
1486 | break; | |
4ed46869 KH |
1487 | |
1488 | default: | |
1489 | if (c < 0x80) | |
f46869e4 KH |
1490 | { |
1491 | single_shifting = 0; | |
1492 | break; | |
1493 | } | |
4ed46869 | 1494 | else if (c < 0xA0) |
c4825358 | 1495 | { |
f46869e4 | 1496 | single_shifting = 0; |
3f003981 KH |
1497 | if (VECTORP (Vlatin_extra_code_table) |
1498 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
c4825358 | 1499 | { |
3f003981 KH |
1500 | int newmask = 0; |
1501 | ||
d46c5b12 KH |
1502 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1503 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 | 1504 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1505 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1506 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 KH |
1507 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
1508 | mask &= newmask; | |
d46c5b12 | 1509 | mask_found |= newmask; |
c4825358 | 1510 | } |
3f003981 KH |
1511 | else |
1512 | return 0; | |
c4825358 | 1513 | } |
4ed46869 KH |
1514 | else |
1515 | { | |
d46c5b12 | 1516 | mask &= ~(CODING_CATEGORY_MASK_ISO_7BIT |
7717c392 | 1517 | | CODING_CATEGORY_MASK_ISO_7_ELSE); |
d46c5b12 | 1518 | mask_found |= CODING_CATEGORY_MASK_ISO_8_1; |
f46869e4 KH |
1519 | /* Check the length of succeeding codes of the range |
1520 | 0xA0..0FF. If the byte length is odd, we exclude | |
1521 | CODING_CATEGORY_MASK_ISO_8_2. We can check this only | |
1522 | when we are not single shifting. */ | |
b73bfc1c KH |
1523 | if (!single_shifting |
1524 | && mask & CODING_CATEGORY_MASK_ISO_8_2) | |
f46869e4 | 1525 | { |
e17de821 | 1526 | int i = 1; |
8d239c89 KH |
1527 | |
1528 | c = -1; | |
b73bfc1c KH |
1529 | while (src < src_end) |
1530 | { | |
0a28aafb | 1531 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
b73bfc1c KH |
1532 | if (c < 0xA0) |
1533 | break; | |
1534 | i++; | |
1535 | } | |
1536 | ||
1537 | if (i & 1 && src < src_end) | |
f46869e4 KH |
1538 | mask &= ~CODING_CATEGORY_MASK_ISO_8_2; |
1539 | else | |
1540 | mask_found |= CODING_CATEGORY_MASK_ISO_8_2; | |
8d239c89 KH |
1541 | if (c >= 0) |
1542 | /* This means that we have read one extra byte. */ | |
1543 | goto retry; | |
f46869e4 | 1544 | } |
4ed46869 KH |
1545 | } |
1546 | break; | |
1547 | } | |
1548 | } | |
b73bfc1c | 1549 | label_end_of_loop: |
d46c5b12 | 1550 | return (mask & mask_found); |
4ed46869 KH |
1551 | } |
1552 | ||
b73bfc1c KH |
1553 | /* Decode a character of which charset is CHARSET, the 1st position |
1554 | code is C1, the 2nd position code is C2, and return the decoded | |
1555 | character code. If the variable `translation_table' is non-nil, | |
1556 | returned the translated code. */ | |
ec6d2bb8 | 1557 | |
b73bfc1c KH |
1558 | #define DECODE_ISO_CHARACTER(charset, c1, c2) \ |
1559 | (NILP (translation_table) \ | |
1560 | ? MAKE_CHAR (charset, c1, c2) \ | |
1561 | : translate_char (translation_table, -1, charset, c1, c2)) | |
4ed46869 KH |
1562 | |
1563 | /* Set designation state into CODING. */ | |
d46c5b12 KH |
1564 | #define DECODE_DESIGNATION(reg, dimension, chars, final_char) \ |
1565 | do { \ | |
05e6f5dc | 1566 | int charset, c; \ |
944bd420 KH |
1567 | \ |
1568 | if (final_char < '0' || final_char >= 128) \ | |
1569 | goto label_invalid_code; \ | |
1570 | charset = ISO_CHARSET_TABLE (make_number (dimension), \ | |
1571 | make_number (chars), \ | |
1572 | make_number (final_char)); \ | |
05e6f5dc | 1573 | c = MAKE_CHAR (charset, 0, 0); \ |
d46c5b12 | 1574 | if (charset >= 0 \ |
704c5781 | 1575 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) == reg \ |
05e6f5dc | 1576 | || CODING_SAFE_CHAR_P (safe_chars, c))) \ |
d46c5b12 KH |
1577 | { \ |
1578 | if (coding->spec.iso2022.last_invalid_designation_register == 0 \ | |
1579 | && reg == 0 \ | |
1580 | && charset == CHARSET_ASCII) \ | |
1581 | { \ | |
1582 | /* We should insert this designation sequence as is so \ | |
1583 | that it is surely written back to a file. */ \ | |
1584 | coding->spec.iso2022.last_invalid_designation_register = -1; \ | |
1585 | goto label_invalid_code; \ | |
1586 | } \ | |
1587 | coding->spec.iso2022.last_invalid_designation_register = -1; \ | |
1588 | if ((coding->mode & CODING_MODE_DIRECTION) \ | |
1589 | && CHARSET_REVERSE_CHARSET (charset) >= 0) \ | |
1590 | charset = CHARSET_REVERSE_CHARSET (charset); \ | |
1591 | CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \ | |
1592 | } \ | |
1593 | else \ | |
1594 | { \ | |
1595 | coding->spec.iso2022.last_invalid_designation_register = reg; \ | |
1596 | goto label_invalid_code; \ | |
1597 | } \ | |
4ed46869 KH |
1598 | } while (0) |
1599 | ||
ec6d2bb8 KH |
1600 | /* Allocate a memory block for storing information about compositions. |
1601 | The block is chained to the already allocated blocks. */ | |
d46c5b12 | 1602 | |
33fb63eb | 1603 | void |
ec6d2bb8 | 1604 | coding_allocate_composition_data (coding, char_offset) |
d46c5b12 | 1605 | struct coding_system *coding; |
ec6d2bb8 | 1606 | int char_offset; |
d46c5b12 | 1607 | { |
ec6d2bb8 KH |
1608 | struct composition_data *cmp_data |
1609 | = (struct composition_data *) xmalloc (sizeof *cmp_data); | |
1610 | ||
1611 | cmp_data->char_offset = char_offset; | |
1612 | cmp_data->used = 0; | |
1613 | cmp_data->prev = coding->cmp_data; | |
1614 | cmp_data->next = NULL; | |
1615 | if (coding->cmp_data) | |
1616 | coding->cmp_data->next = cmp_data; | |
1617 | coding->cmp_data = cmp_data; | |
1618 | coding->cmp_data_start = 0; | |
1619 | } | |
d46c5b12 | 1620 | |
aa72b389 KH |
1621 | /* Handle composition start sequence ESC 0, ESC 2, ESC 3, or ESC 4. |
1622 | ESC 0 : relative composition : ESC 0 CHAR ... ESC 1 | |
1623 | ESC 2 : rulebase composition : ESC 2 CHAR RULE CHAR RULE ... CHAR ESC 1 | |
1624 | ESC 3 : altchar composition : ESC 3 ALT ... ESC 0 CHAR ... ESC 1 | |
1625 | ESC 4 : alt&rule composition : ESC 4 ALT RULE .. ALT ESC 0 CHAR ... ESC 1 | |
1626 | */ | |
ec6d2bb8 | 1627 | |
33fb63eb KH |
1628 | #define DECODE_COMPOSITION_START(c1) \ |
1629 | do { \ | |
1630 | if (coding->composing == COMPOSITION_DISABLED) \ | |
1631 | { \ | |
1632 | *dst++ = ISO_CODE_ESC; \ | |
1633 | *dst++ = c1 & 0x7f; \ | |
1634 | coding->produced_char += 2; \ | |
1635 | } \ | |
1636 | else if (!COMPOSING_P (coding)) \ | |
1637 | { \ | |
1638 | /* This is surely the start of a composition. We must be sure \ | |
1639 | that coding->cmp_data has enough space to store the \ | |
1640 | information about the composition. If not, terminate the \ | |
1641 | current decoding loop, allocate one more memory block for \ | |
8ca3766a | 1642 | coding->cmp_data in the caller, then start the decoding \ |
33fb63eb KH |
1643 | loop again. We can't allocate memory here directly because \ |
1644 | it may cause buffer/string relocation. */ \ | |
1645 | if (!coding->cmp_data \ | |
1646 | || (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH \ | |
1647 | >= COMPOSITION_DATA_SIZE)) \ | |
1648 | { \ | |
1649 | coding->result = CODING_FINISH_INSUFFICIENT_CMP; \ | |
1650 | goto label_end_of_loop; \ | |
1651 | } \ | |
1652 | coding->composing = (c1 == '0' ? COMPOSITION_RELATIVE \ | |
1653 | : c1 == '2' ? COMPOSITION_WITH_RULE \ | |
1654 | : c1 == '3' ? COMPOSITION_WITH_ALTCHARS \ | |
1655 | : COMPOSITION_WITH_RULE_ALTCHARS); \ | |
1656 | CODING_ADD_COMPOSITION_START (coding, coding->produced_char, \ | |
1657 | coding->composing); \ | |
1658 | coding->composition_rule_follows = 0; \ | |
1659 | } \ | |
1660 | else \ | |
1661 | { \ | |
1662 | /* We are already handling a composition. If the method is \ | |
1663 | the following two, the codes following the current escape \ | |
1664 | sequence are actual characters stored in a buffer. */ \ | |
1665 | if (coding->composing == COMPOSITION_WITH_ALTCHARS \ | |
1666 | || coding->composing == COMPOSITION_WITH_RULE_ALTCHARS) \ | |
1667 | { \ | |
1668 | coding->composing = COMPOSITION_RELATIVE; \ | |
1669 | coding->composition_rule_follows = 0; \ | |
1670 | } \ | |
1671 | } \ | |
ec6d2bb8 KH |
1672 | } while (0) |
1673 | ||
8ca3766a | 1674 | /* Handle composition end sequence ESC 1. */ |
ec6d2bb8 KH |
1675 | |
1676 | #define DECODE_COMPOSITION_END(c1) \ | |
1677 | do { \ | |
93dec019 | 1678 | if (! COMPOSING_P (coding)) \ |
ec6d2bb8 KH |
1679 | { \ |
1680 | *dst++ = ISO_CODE_ESC; \ | |
1681 | *dst++ = c1; \ | |
1682 | coding->produced_char += 2; \ | |
1683 | } \ | |
1684 | else \ | |
1685 | { \ | |
1686 | CODING_ADD_COMPOSITION_END (coding, coding->produced_char); \ | |
1687 | coding->composing = COMPOSITION_NO; \ | |
1688 | } \ | |
1689 | } while (0) | |
1690 | ||
1691 | /* Decode a composition rule from the byte C1 (and maybe one more byte | |
1692 | from SRC) and store one encoded composition rule in | |
1693 | coding->cmp_data. */ | |
1694 | ||
1695 | #define DECODE_COMPOSITION_RULE(c1) \ | |
1696 | do { \ | |
1697 | int rule = 0; \ | |
1698 | (c1) -= 32; \ | |
1699 | if (c1 < 81) /* old format (before ver.21) */ \ | |
1700 | { \ | |
1701 | int gref = (c1) / 9; \ | |
1702 | int nref = (c1) % 9; \ | |
1703 | if (gref == 4) gref = 10; \ | |
1704 | if (nref == 4) nref = 10; \ | |
1705 | rule = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
1706 | } \ | |
b73bfc1c | 1707 | else if (c1 < 93) /* new format (after ver.21) */ \ |
ec6d2bb8 KH |
1708 | { \ |
1709 | ONE_MORE_BYTE (c2); \ | |
1710 | rule = COMPOSITION_ENCODE_RULE (c1 - 81, c2 - 32); \ | |
1711 | } \ | |
1712 | CODING_ADD_COMPOSITION_COMPONENT (coding, rule); \ | |
1713 | coding->composition_rule_follows = 0; \ | |
1714 | } while (0) | |
88993dfd | 1715 | |
d46c5b12 | 1716 | |
4ed46869 KH |
1717 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
1718 | ||
b73bfc1c | 1719 | static void |
d46c5b12 | 1720 | decode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
1721 | struct coding_system *coding; |
1722 | unsigned char *source, *destination; | |
1723 | int src_bytes, dst_bytes; | |
4ed46869 KH |
1724 | { |
1725 | unsigned char *src = source; | |
1726 | unsigned char *src_end = source + src_bytes; | |
1727 | unsigned char *dst = destination; | |
1728 | unsigned char *dst_end = destination + dst_bytes; | |
4ed46869 KH |
1729 | /* Charsets invoked to graphic plane 0 and 1 respectively. */ |
1730 | int charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
1731 | int charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
b73bfc1c KH |
1732 | /* SRC_BASE remembers the start position in source in each loop. |
1733 | The loop will be exited when there's not enough source code | |
1734 | (within macro ONE_MORE_BYTE), or when there's not enough | |
1735 | destination area to produce a character (within macro | |
1736 | EMIT_CHAR). */ | |
1737 | unsigned char *src_base; | |
1738 | int c, charset; | |
1739 | Lisp_Object translation_table; | |
05e6f5dc KH |
1740 | Lisp_Object safe_chars; |
1741 | ||
1742 | safe_chars = coding_safe_chars (coding); | |
bdd9fb48 | 1743 | |
b73bfc1c KH |
1744 | if (NILP (Venable_character_translation)) |
1745 | translation_table = Qnil; | |
1746 | else | |
1747 | { | |
1748 | translation_table = coding->translation_table_for_decode; | |
1749 | if (NILP (translation_table)) | |
1750 | translation_table = Vstandard_translation_table_for_decode; | |
1751 | } | |
4ed46869 | 1752 | |
b73bfc1c KH |
1753 | coding->result = CODING_FINISH_NORMAL; |
1754 | ||
1755 | while (1) | |
4ed46869 | 1756 | { |
b73bfc1c KH |
1757 | int c1, c2; |
1758 | ||
1759 | src_base = src; | |
1760 | ONE_MORE_BYTE (c1); | |
4ed46869 | 1761 | |
ec6d2bb8 | 1762 | /* We produce no character or one character. */ |
4ed46869 KH |
1763 | switch (iso_code_class [c1]) |
1764 | { | |
1765 | case ISO_0x20_or_0x7F: | |
ec6d2bb8 KH |
1766 | if (COMPOSING_P (coding) && coding->composition_rule_follows) |
1767 | { | |
1768 | DECODE_COMPOSITION_RULE (c1); | |
b73bfc1c | 1769 | continue; |
ec6d2bb8 KH |
1770 | } |
1771 | if (charset0 < 0 || CHARSET_CHARS (charset0) == 94) | |
4ed46869 KH |
1772 | { |
1773 | /* This is SPACE or DEL. */ | |
b73bfc1c | 1774 | charset = CHARSET_ASCII; |
4ed46869 KH |
1775 | break; |
1776 | } | |
1777 | /* This is a graphic character, we fall down ... */ | |
1778 | ||
1779 | case ISO_graphic_plane_0: | |
ec6d2bb8 | 1780 | if (COMPOSING_P (coding) && coding->composition_rule_follows) |
b73bfc1c KH |
1781 | { |
1782 | DECODE_COMPOSITION_RULE (c1); | |
1783 | continue; | |
1784 | } | |
1785 | charset = charset0; | |
4ed46869 KH |
1786 | break; |
1787 | ||
1788 | case ISO_0xA0_or_0xFF: | |
d46c5b12 KH |
1789 | if (charset1 < 0 || CHARSET_CHARS (charset1) == 94 |
1790 | || coding->flags & CODING_FLAG_ISO_SEVEN_BITS) | |
fb88bf2d | 1791 | goto label_invalid_code; |
4ed46869 KH |
1792 | /* This is a graphic character, we fall down ... */ |
1793 | ||
1794 | case ISO_graphic_plane_1: | |
b73bfc1c | 1795 | if (charset1 < 0) |
fb88bf2d | 1796 | goto label_invalid_code; |
b73bfc1c | 1797 | charset = charset1; |
4ed46869 KH |
1798 | break; |
1799 | ||
b73bfc1c | 1800 | case ISO_control_0: |
ec6d2bb8 KH |
1801 | if (COMPOSING_P (coding)) |
1802 | DECODE_COMPOSITION_END ('1'); | |
1803 | ||
4ed46869 KH |
1804 | /* All ISO2022 control characters in this class have the |
1805 | same representation in Emacs internal format. */ | |
d46c5b12 KH |
1806 | if (c1 == '\n' |
1807 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
1808 | && (coding->eol_type == CODING_EOL_CR | |
1809 | || coding->eol_type == CODING_EOL_CRLF)) | |
1810 | { | |
b73bfc1c KH |
1811 | coding->result = CODING_FINISH_INCONSISTENT_EOL; |
1812 | goto label_end_of_loop; | |
d46c5b12 | 1813 | } |
b73bfc1c | 1814 | charset = CHARSET_ASCII; |
4ed46869 KH |
1815 | break; |
1816 | ||
b73bfc1c KH |
1817 | case ISO_control_1: |
1818 | if (COMPOSING_P (coding)) | |
1819 | DECODE_COMPOSITION_END ('1'); | |
1820 | goto label_invalid_code; | |
1821 | ||
4ed46869 | 1822 | case ISO_carriage_return: |
ec6d2bb8 KH |
1823 | if (COMPOSING_P (coding)) |
1824 | DECODE_COMPOSITION_END ('1'); | |
1825 | ||
4ed46869 | 1826 | if (coding->eol_type == CODING_EOL_CR) |
b73bfc1c | 1827 | c1 = '\n'; |
4ed46869 KH |
1828 | else if (coding->eol_type == CODING_EOL_CRLF) |
1829 | { | |
1830 | ONE_MORE_BYTE (c1); | |
b73bfc1c | 1831 | if (c1 != ISO_CODE_LF) |
4ed46869 KH |
1832 | { |
1833 | src--; | |
b73bfc1c | 1834 | c1 = '\r'; |
4ed46869 KH |
1835 | } |
1836 | } | |
b73bfc1c | 1837 | charset = CHARSET_ASCII; |
4ed46869 KH |
1838 | break; |
1839 | ||
1840 | case ISO_shift_out: | |
d46c5b12 KH |
1841 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1842 | || CODING_SPEC_ISO_DESIGNATION (coding, 1) < 0) | |
1843 | goto label_invalid_code; | |
4ed46869 KH |
1844 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 1; |
1845 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
b73bfc1c | 1846 | continue; |
4ed46869 KH |
1847 | |
1848 | case ISO_shift_in: | |
d46c5b12 KH |
1849 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)) |
1850 | goto label_invalid_code; | |
4ed46869 KH |
1851 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; |
1852 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
b73bfc1c | 1853 | continue; |
4ed46869 KH |
1854 | |
1855 | case ISO_single_shift_2_7: | |
1856 | case ISO_single_shift_2: | |
d46c5b12 KH |
1857 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
1858 | goto label_invalid_code; | |
4ed46869 KH |
1859 | /* SS2 is handled as an escape sequence of ESC 'N' */ |
1860 | c1 = 'N'; | |
1861 | goto label_escape_sequence; | |
1862 | ||
1863 | case ISO_single_shift_3: | |
d46c5b12 KH |
1864 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
1865 | goto label_invalid_code; | |
4ed46869 KH |
1866 | /* SS2 is handled as an escape sequence of ESC 'O' */ |
1867 | c1 = 'O'; | |
1868 | goto label_escape_sequence; | |
1869 | ||
1870 | case ISO_control_sequence_introducer: | |
1871 | /* CSI is handled as an escape sequence of ESC '[' ... */ | |
1872 | c1 = '['; | |
1873 | goto label_escape_sequence; | |
1874 | ||
1875 | case ISO_escape: | |
1876 | ONE_MORE_BYTE (c1); | |
1877 | label_escape_sequence: | |
1878 | /* Escape sequences handled by Emacs are invocation, | |
1879 | designation, direction specification, and character | |
1880 | composition specification. */ | |
1881 | switch (c1) | |
1882 | { | |
1883 | case '&': /* revision of following character set */ | |
1884 | ONE_MORE_BYTE (c1); | |
1885 | if (!(c1 >= '@' && c1 <= '~')) | |
d46c5b12 | 1886 | goto label_invalid_code; |
4ed46869 KH |
1887 | ONE_MORE_BYTE (c1); |
1888 | if (c1 != ISO_CODE_ESC) | |
d46c5b12 | 1889 | goto label_invalid_code; |
4ed46869 KH |
1890 | ONE_MORE_BYTE (c1); |
1891 | goto label_escape_sequence; | |
1892 | ||
1893 | case '$': /* designation of 2-byte character set */ | |
d46c5b12 KH |
1894 | if (! (coding->flags & CODING_FLAG_ISO_DESIGNATION)) |
1895 | goto label_invalid_code; | |
4ed46869 KH |
1896 | ONE_MORE_BYTE (c1); |
1897 | if (c1 >= '@' && c1 <= 'B') | |
1898 | { /* designation of JISX0208.1978, GB2312.1980, | |
88993dfd | 1899 | or JISX0208.1980 */ |
4ed46869 KH |
1900 | DECODE_DESIGNATION (0, 2, 94, c1); |
1901 | } | |
1902 | else if (c1 >= 0x28 && c1 <= 0x2B) | |
1903 | { /* designation of DIMENSION2_CHARS94 character set */ | |
1904 | ONE_MORE_BYTE (c2); | |
1905 | DECODE_DESIGNATION (c1 - 0x28, 2, 94, c2); | |
1906 | } | |
1907 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
1908 | { /* designation of DIMENSION2_CHARS96 character set */ | |
1909 | ONE_MORE_BYTE (c2); | |
1910 | DECODE_DESIGNATION (c1 - 0x2C, 2, 96, c2); | |
1911 | } | |
1912 | else | |
d46c5b12 | 1913 | goto label_invalid_code; |
b73bfc1c KH |
1914 | /* We must update these variables now. */ |
1915 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
1916 | charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
1917 | continue; | |
4ed46869 KH |
1918 | |
1919 | case 'n': /* invocation of locking-shift-2 */ | |
d46c5b12 KH |
1920 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1921 | || CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0) | |
1922 | goto label_invalid_code; | |
4ed46869 | 1923 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 2; |
e0e989f6 | 1924 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); |
b73bfc1c | 1925 | continue; |
4ed46869 KH |
1926 | |
1927 | case 'o': /* invocation of locking-shift-3 */ | |
d46c5b12 KH |
1928 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1929 | || CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0) | |
1930 | goto label_invalid_code; | |
4ed46869 | 1931 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 3; |
e0e989f6 | 1932 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); |
b73bfc1c | 1933 | continue; |
4ed46869 KH |
1934 | |
1935 | case 'N': /* invocation of single-shift-2 */ | |
d46c5b12 KH |
1936 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) |
1937 | || CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0) | |
1938 | goto label_invalid_code; | |
4ed46869 | 1939 | charset = CODING_SPEC_ISO_DESIGNATION (coding, 2); |
b73bfc1c | 1940 | ONE_MORE_BYTE (c1); |
e7046a18 KH |
1941 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
1942 | goto label_invalid_code; | |
4ed46869 KH |
1943 | break; |
1944 | ||
1945 | case 'O': /* invocation of single-shift-3 */ | |
d46c5b12 KH |
1946 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) |
1947 | || CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0) | |
1948 | goto label_invalid_code; | |
4ed46869 | 1949 | charset = CODING_SPEC_ISO_DESIGNATION (coding, 3); |
b73bfc1c | 1950 | ONE_MORE_BYTE (c1); |
e7046a18 KH |
1951 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
1952 | goto label_invalid_code; | |
4ed46869 KH |
1953 | break; |
1954 | ||
ec6d2bb8 KH |
1955 | case '0': case '2': case '3': case '4': /* start composition */ |
1956 | DECODE_COMPOSITION_START (c1); | |
b73bfc1c | 1957 | continue; |
4ed46869 | 1958 | |
ec6d2bb8 KH |
1959 | case '1': /* end composition */ |
1960 | DECODE_COMPOSITION_END (c1); | |
b73bfc1c | 1961 | continue; |
4ed46869 KH |
1962 | |
1963 | case '[': /* specification of direction */ | |
d46c5b12 KH |
1964 | if (coding->flags & CODING_FLAG_ISO_NO_DIRECTION) |
1965 | goto label_invalid_code; | |
4ed46869 | 1966 | /* For the moment, nested direction is not supported. |
d46c5b12 | 1967 | So, `coding->mode & CODING_MODE_DIRECTION' zero means |
8ca3766a | 1968 | left-to-right, and nonzero means right-to-left. */ |
4ed46869 KH |
1969 | ONE_MORE_BYTE (c1); |
1970 | switch (c1) | |
1971 | { | |
1972 | case ']': /* end of the current direction */ | |
d46c5b12 | 1973 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 KH |
1974 | |
1975 | case '0': /* end of the current direction */ | |
1976 | case '1': /* start of left-to-right direction */ | |
1977 | ONE_MORE_BYTE (c1); | |
1978 | if (c1 == ']') | |
d46c5b12 | 1979 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 | 1980 | else |
d46c5b12 | 1981 | goto label_invalid_code; |
4ed46869 KH |
1982 | break; |
1983 | ||
1984 | case '2': /* start of right-to-left direction */ | |
1985 | ONE_MORE_BYTE (c1); | |
1986 | if (c1 == ']') | |
d46c5b12 | 1987 | coding->mode |= CODING_MODE_DIRECTION; |
4ed46869 | 1988 | else |
d46c5b12 | 1989 | goto label_invalid_code; |
4ed46869 KH |
1990 | break; |
1991 | ||
1992 | default: | |
d46c5b12 | 1993 | goto label_invalid_code; |
4ed46869 | 1994 | } |
b73bfc1c | 1995 | continue; |
4ed46869 KH |
1996 | |
1997 | default: | |
d46c5b12 KH |
1998 | if (! (coding->flags & CODING_FLAG_ISO_DESIGNATION)) |
1999 | goto label_invalid_code; | |
4ed46869 KH |
2000 | if (c1 >= 0x28 && c1 <= 0x2B) |
2001 | { /* designation of DIMENSION1_CHARS94 character set */ | |
2002 | ONE_MORE_BYTE (c2); | |
2003 | DECODE_DESIGNATION (c1 - 0x28, 1, 94, c2); | |
2004 | } | |
2005 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
2006 | { /* designation of DIMENSION1_CHARS96 character set */ | |
2007 | ONE_MORE_BYTE (c2); | |
2008 | DECODE_DESIGNATION (c1 - 0x2C, 1, 96, c2); | |
2009 | } | |
2010 | else | |
b73bfc1c KH |
2011 | goto label_invalid_code; |
2012 | /* We must update these variables now. */ | |
2013 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
2014 | charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
2015 | continue; | |
4ed46869 | 2016 | } |
b73bfc1c | 2017 | } |
4ed46869 | 2018 | |
b73bfc1c KH |
2019 | /* Now we know CHARSET and 1st position code C1 of a character. |
2020 | Produce a multibyte sequence for that character while getting | |
2021 | 2nd position code C2 if necessary. */ | |
2022 | if (CHARSET_DIMENSION (charset) == 2) | |
2023 | { | |
2024 | ONE_MORE_BYTE (c2); | |
2025 | if (c1 < 0x80 ? c2 < 0x20 || c2 >= 0x80 : c2 < 0xA0) | |
2026 | /* C2 is not in a valid range. */ | |
2027 | goto label_invalid_code; | |
4ed46869 | 2028 | } |
b73bfc1c KH |
2029 | c = DECODE_ISO_CHARACTER (charset, c1, c2); |
2030 | EMIT_CHAR (c); | |
4ed46869 KH |
2031 | continue; |
2032 | ||
b73bfc1c KH |
2033 | label_invalid_code: |
2034 | coding->errors++; | |
2035 | if (COMPOSING_P (coding)) | |
2036 | DECODE_COMPOSITION_END ('1'); | |
4ed46869 | 2037 | src = src_base; |
b73bfc1c KH |
2038 | c = *src++; |
2039 | EMIT_CHAR (c); | |
4ed46869 | 2040 | } |
fb88bf2d | 2041 | |
b73bfc1c KH |
2042 | label_end_of_loop: |
2043 | coding->consumed = coding->consumed_char = src_base - source; | |
d46c5b12 | 2044 | coding->produced = dst - destination; |
b73bfc1c | 2045 | return; |
4ed46869 KH |
2046 | } |
2047 | ||
b73bfc1c | 2048 | |
f4dee582 | 2049 | /* ISO2022 encoding stuff. */ |
4ed46869 KH |
2050 | |
2051 | /* | |
f4dee582 | 2052 | It is not enough to say just "ISO2022" on encoding, we have to |
cfb43547 | 2053 | specify more details. In Emacs, each ISO2022 coding system |
4ed46869 | 2054 | variant has the following specifications: |
8ca3766a | 2055 | 1. Initial designation to G0 through G3. |
4ed46869 KH |
2056 | 2. Allows short-form designation? |
2057 | 3. ASCII should be designated to G0 before control characters? | |
2058 | 4. ASCII should be designated to G0 at end of line? | |
2059 | 5. 7-bit environment or 8-bit environment? | |
2060 | 6. Use locking-shift? | |
2061 | 7. Use Single-shift? | |
2062 | And the following two are only for Japanese: | |
2063 | 8. Use ASCII in place of JIS0201-1976-Roman? | |
2064 | 9. Use JISX0208-1983 in place of JISX0208-1978? | |
2065 | These specifications are encoded in `coding->flags' as flag bits | |
2066 | defined by macros CODING_FLAG_ISO_XXX. See `coding.h' for more | |
f4dee582 | 2067 | details. |
4ed46869 KH |
2068 | */ |
2069 | ||
2070 | /* Produce codes (escape sequence) for designating CHARSET to graphic | |
b73bfc1c KH |
2071 | register REG at DST, and increment DST. If <final-char> of CHARSET is |
2072 | '@', 'A', or 'B' and the coding system CODING allows, produce | |
2073 | designation sequence of short-form. */ | |
4ed46869 KH |
2074 | |
2075 | #define ENCODE_DESIGNATION(charset, reg, coding) \ | |
2076 | do { \ | |
2077 | unsigned char final_char = CHARSET_ISO_FINAL_CHAR (charset); \ | |
2078 | char *intermediate_char_94 = "()*+"; \ | |
2079 | char *intermediate_char_96 = ",-./"; \ | |
70c22245 | 2080 | int revision = CODING_SPEC_ISO_REVISION_NUMBER(coding, charset); \ |
b73bfc1c | 2081 | \ |
70c22245 KH |
2082 | if (revision < 255) \ |
2083 | { \ | |
4ed46869 KH |
2084 | *dst++ = ISO_CODE_ESC; \ |
2085 | *dst++ = '&'; \ | |
70c22245 | 2086 | *dst++ = '@' + revision; \ |
4ed46869 | 2087 | } \ |
b73bfc1c | 2088 | *dst++ = ISO_CODE_ESC; \ |
4ed46869 KH |
2089 | if (CHARSET_DIMENSION (charset) == 1) \ |
2090 | { \ | |
2091 | if (CHARSET_CHARS (charset) == 94) \ | |
2092 | *dst++ = (unsigned char) (intermediate_char_94[reg]); \ | |
2093 | else \ | |
2094 | *dst++ = (unsigned char) (intermediate_char_96[reg]); \ | |
2095 | } \ | |
2096 | else \ | |
2097 | { \ | |
2098 | *dst++ = '$'; \ | |
2099 | if (CHARSET_CHARS (charset) == 94) \ | |
2100 | { \ | |
b73bfc1c KH |
2101 | if (! (coding->flags & CODING_FLAG_ISO_SHORT_FORM) \ |
2102 | || reg != 0 \ | |
2103 | || final_char < '@' || final_char > 'B') \ | |
4ed46869 KH |
2104 | *dst++ = (unsigned char) (intermediate_char_94[reg]); \ |
2105 | } \ | |
2106 | else \ | |
b73bfc1c | 2107 | *dst++ = (unsigned char) (intermediate_char_96[reg]); \ |
4ed46869 | 2108 | } \ |
b73bfc1c | 2109 | *dst++ = final_char; \ |
4ed46869 KH |
2110 | CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \ |
2111 | } while (0) | |
2112 | ||
2113 | /* The following two macros produce codes (control character or escape | |
2114 | sequence) for ISO2022 single-shift functions (single-shift-2 and | |
2115 | single-shift-3). */ | |
2116 | ||
2117 | #define ENCODE_SINGLE_SHIFT_2 \ | |
2118 | do { \ | |
2119 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2120 | *dst++ = ISO_CODE_ESC, *dst++ = 'N'; \ | |
2121 | else \ | |
b73bfc1c | 2122 | *dst++ = ISO_CODE_SS2; \ |
4ed46869 KH |
2123 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 1; \ |
2124 | } while (0) | |
2125 | ||
fb88bf2d KH |
2126 | #define ENCODE_SINGLE_SHIFT_3 \ |
2127 | do { \ | |
4ed46869 | 2128 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ |
fb88bf2d KH |
2129 | *dst++ = ISO_CODE_ESC, *dst++ = 'O'; \ |
2130 | else \ | |
b73bfc1c | 2131 | *dst++ = ISO_CODE_SS3; \ |
4ed46869 KH |
2132 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 1; \ |
2133 | } while (0) | |
2134 | ||
2135 | /* The following four macros produce codes (control character or | |
2136 | escape sequence) for ISO2022 locking-shift functions (shift-in, | |
2137 | shift-out, locking-shift-2, and locking-shift-3). */ | |
2138 | ||
b73bfc1c KH |
2139 | #define ENCODE_SHIFT_IN \ |
2140 | do { \ | |
2141 | *dst++ = ISO_CODE_SI; \ | |
4ed46869 KH |
2142 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; \ |
2143 | } while (0) | |
2144 | ||
b73bfc1c KH |
2145 | #define ENCODE_SHIFT_OUT \ |
2146 | do { \ | |
2147 | *dst++ = ISO_CODE_SO; \ | |
4ed46869 KH |
2148 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 1; \ |
2149 | } while (0) | |
2150 | ||
2151 | #define ENCODE_LOCKING_SHIFT_2 \ | |
2152 | do { \ | |
2153 | *dst++ = ISO_CODE_ESC, *dst++ = 'n'; \ | |
2154 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 2; \ | |
2155 | } while (0) | |
2156 | ||
b73bfc1c KH |
2157 | #define ENCODE_LOCKING_SHIFT_3 \ |
2158 | do { \ | |
2159 | *dst++ = ISO_CODE_ESC, *dst++ = 'o'; \ | |
4ed46869 KH |
2160 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 3; \ |
2161 | } while (0) | |
2162 | ||
f4dee582 RS |
2163 | /* Produce codes for a DIMENSION1 character whose character set is |
2164 | CHARSET and whose position-code is C1. Designation and invocation | |
4ed46869 KH |
2165 | sequences are also produced in advance if necessary. */ |
2166 | ||
6e85d753 KH |
2167 | #define ENCODE_ISO_CHARACTER_DIMENSION1(charset, c1) \ |
2168 | do { \ | |
2169 | if (CODING_SPEC_ISO_SINGLE_SHIFTING (coding)) \ | |
2170 | { \ | |
2171 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2172 | *dst++ = c1 & 0x7F; \ | |
2173 | else \ | |
2174 | *dst++ = c1 | 0x80; \ | |
2175 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
2176 | break; \ | |
2177 | } \ | |
2178 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 0)) \ | |
2179 | { \ | |
2180 | *dst++ = c1 & 0x7F; \ | |
2181 | break; \ | |
2182 | } \ | |
2183 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 1)) \ | |
2184 | { \ | |
2185 | *dst++ = c1 | 0x80; \ | |
2186 | break; \ | |
2187 | } \ | |
6e85d753 KH |
2188 | else \ |
2189 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
2190 | must invoke it, or, at first, designate it to some graphic \ | |
2191 | register. Then repeat the loop to actually produce the \ | |
2192 | character. */ \ | |
2193 | dst = encode_invocation_designation (charset, coding, dst); \ | |
4ed46869 KH |
2194 | } while (1) |
2195 | ||
f4dee582 RS |
2196 | /* Produce codes for a DIMENSION2 character whose character set is |
2197 | CHARSET and whose position-codes are C1 and C2. Designation and | |
4ed46869 KH |
2198 | invocation codes are also produced in advance if necessary. */ |
2199 | ||
6e85d753 KH |
2200 | #define ENCODE_ISO_CHARACTER_DIMENSION2(charset, c1, c2) \ |
2201 | do { \ | |
2202 | if (CODING_SPEC_ISO_SINGLE_SHIFTING (coding)) \ | |
2203 | { \ | |
2204 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2205 | *dst++ = c1 & 0x7F, *dst++ = c2 & 0x7F; \ | |
2206 | else \ | |
2207 | *dst++ = c1 | 0x80, *dst++ = c2 | 0x80; \ | |
2208 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
2209 | break; \ | |
2210 | } \ | |
2211 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 0)) \ | |
2212 | { \ | |
2213 | *dst++ = c1 & 0x7F, *dst++= c2 & 0x7F; \ | |
2214 | break; \ | |
2215 | } \ | |
2216 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 1)) \ | |
2217 | { \ | |
2218 | *dst++ = c1 | 0x80, *dst++= c2 | 0x80; \ | |
2219 | break; \ | |
2220 | } \ | |
6e85d753 KH |
2221 | else \ |
2222 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
2223 | must invoke it, or, at first, designate it to some graphic \ | |
2224 | register. Then repeat the loop to actually produce the \ | |
2225 | character. */ \ | |
2226 | dst = encode_invocation_designation (charset, coding, dst); \ | |
4ed46869 KH |
2227 | } while (1) |
2228 | ||
05e6f5dc KH |
2229 | #define ENCODE_ISO_CHARACTER(c) \ |
2230 | do { \ | |
2231 | int charset, c1, c2; \ | |
2232 | \ | |
2233 | SPLIT_CHAR (c, charset, c1, c2); \ | |
2234 | if (CHARSET_DEFINED_P (charset)) \ | |
2235 | { \ | |
2236 | if (CHARSET_DIMENSION (charset) == 1) \ | |
2237 | { \ | |
2238 | if (charset == CHARSET_ASCII \ | |
2239 | && coding->flags & CODING_FLAG_ISO_USE_ROMAN) \ | |
2240 | charset = charset_latin_jisx0201; \ | |
2241 | ENCODE_ISO_CHARACTER_DIMENSION1 (charset, c1); \ | |
2242 | } \ | |
2243 | else \ | |
2244 | { \ | |
2245 | if (charset == charset_jisx0208 \ | |
2246 | && coding->flags & CODING_FLAG_ISO_USE_OLDJIS) \ | |
2247 | charset = charset_jisx0208_1978; \ | |
2248 | ENCODE_ISO_CHARACTER_DIMENSION2 (charset, c1, c2); \ | |
2249 | } \ | |
2250 | } \ | |
2251 | else \ | |
2252 | { \ | |
2253 | *dst++ = c1; \ | |
2254 | if (c2 >= 0) \ | |
2255 | *dst++ = c2; \ | |
2256 | } \ | |
2257 | } while (0) | |
2258 | ||
2259 | ||
2260 | /* Instead of encoding character C, produce one or two `?'s. */ | |
2261 | ||
2262 | #define ENCODE_UNSAFE_CHARACTER(c) \ | |
6f551029 | 2263 | do { \ |
05e6f5dc KH |
2264 | ENCODE_ISO_CHARACTER (CODING_INHIBIT_CHARACTER_SUBSTITUTION); \ |
2265 | if (CHARSET_WIDTH (CHAR_CHARSET (c)) > 1) \ | |
2266 | ENCODE_ISO_CHARACTER (CODING_INHIBIT_CHARACTER_SUBSTITUTION); \ | |
84fbb8a0 | 2267 | } while (0) |
bdd9fb48 | 2268 | |
05e6f5dc | 2269 | |
4ed46869 KH |
2270 | /* Produce designation and invocation codes at a place pointed by DST |
2271 | to use CHARSET. The element `spec.iso2022' of *CODING is updated. | |
2272 | Return new DST. */ | |
2273 | ||
2274 | unsigned char * | |
2275 | encode_invocation_designation (charset, coding, dst) | |
2276 | int charset; | |
2277 | struct coding_system *coding; | |
2278 | unsigned char *dst; | |
2279 | { | |
2280 | int reg; /* graphic register number */ | |
2281 | ||
2282 | /* At first, check designations. */ | |
2283 | for (reg = 0; reg < 4; reg++) | |
2284 | if (charset == CODING_SPEC_ISO_DESIGNATION (coding, reg)) | |
2285 | break; | |
2286 | ||
2287 | if (reg >= 4) | |
2288 | { | |
2289 | /* CHARSET is not yet designated to any graphic registers. */ | |
2290 | /* At first check the requested designation. */ | |
2291 | reg = CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset); | |
1ba9e4ab KH |
2292 | if (reg == CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION) |
2293 | /* Since CHARSET requests no special designation, designate it | |
2294 | to graphic register 0. */ | |
4ed46869 KH |
2295 | reg = 0; |
2296 | ||
2297 | ENCODE_DESIGNATION (charset, reg, coding); | |
2298 | } | |
2299 | ||
2300 | if (CODING_SPEC_ISO_INVOCATION (coding, 0) != reg | |
2301 | && CODING_SPEC_ISO_INVOCATION (coding, 1) != reg) | |
2302 | { | |
2303 | /* Since the graphic register REG is not invoked to any graphic | |
2304 | planes, invoke it to graphic plane 0. */ | |
2305 | switch (reg) | |
2306 | { | |
2307 | case 0: /* graphic register 0 */ | |
2308 | ENCODE_SHIFT_IN; | |
2309 | break; | |
2310 | ||
2311 | case 1: /* graphic register 1 */ | |
2312 | ENCODE_SHIFT_OUT; | |
2313 | break; | |
2314 | ||
2315 | case 2: /* graphic register 2 */ | |
2316 | if (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) | |
2317 | ENCODE_SINGLE_SHIFT_2; | |
2318 | else | |
2319 | ENCODE_LOCKING_SHIFT_2; | |
2320 | break; | |
2321 | ||
2322 | case 3: /* graphic register 3 */ | |
2323 | if (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) | |
2324 | ENCODE_SINGLE_SHIFT_3; | |
2325 | else | |
2326 | ENCODE_LOCKING_SHIFT_3; | |
2327 | break; | |
2328 | } | |
2329 | } | |
b73bfc1c | 2330 | |
4ed46869 KH |
2331 | return dst; |
2332 | } | |
2333 | ||
ec6d2bb8 KH |
2334 | /* Produce 2-byte codes for encoded composition rule RULE. */ |
2335 | ||
2336 | #define ENCODE_COMPOSITION_RULE(rule) \ | |
2337 | do { \ | |
2338 | int gref, nref; \ | |
2339 | COMPOSITION_DECODE_RULE (rule, gref, nref); \ | |
2340 | *dst++ = 32 + 81 + gref; \ | |
2341 | *dst++ = 32 + nref; \ | |
2342 | } while (0) | |
2343 | ||
2344 | /* Produce codes for indicating the start of a composition sequence | |
2345 | (ESC 0, ESC 3, or ESC 4). DATA points to an array of integers | |
2346 | which specify information about the composition. See the comment | |
2347 | in coding.h for the format of DATA. */ | |
2348 | ||
2349 | #define ENCODE_COMPOSITION_START(coding, data) \ | |
2350 | do { \ | |
2351 | coding->composing = data[3]; \ | |
2352 | *dst++ = ISO_CODE_ESC; \ | |
2353 | if (coding->composing == COMPOSITION_RELATIVE) \ | |
2354 | *dst++ = '0'; \ | |
2355 | else \ | |
2356 | { \ | |
2357 | *dst++ = (coding->composing == COMPOSITION_WITH_ALTCHARS \ | |
2358 | ? '3' : '4'); \ | |
2359 | coding->cmp_data_index = coding->cmp_data_start + 4; \ | |
2360 | coding->composition_rule_follows = 0; \ | |
2361 | } \ | |
2362 | } while (0) | |
2363 | ||
2364 | /* Produce codes for indicating the end of the current composition. */ | |
2365 | ||
2366 | #define ENCODE_COMPOSITION_END(coding, data) \ | |
2367 | do { \ | |
2368 | *dst++ = ISO_CODE_ESC; \ | |
2369 | *dst++ = '1'; \ | |
2370 | coding->cmp_data_start += data[0]; \ | |
2371 | coding->composing = COMPOSITION_NO; \ | |
2372 | if (coding->cmp_data_start == coding->cmp_data->used \ | |
2373 | && coding->cmp_data->next) \ | |
2374 | { \ | |
2375 | coding->cmp_data = coding->cmp_data->next; \ | |
2376 | coding->cmp_data_start = 0; \ | |
2377 | } \ | |
2378 | } while (0) | |
2379 | ||
2380 | /* Produce composition start sequence ESC 0. Here, this sequence | |
2381 | doesn't mean the start of a new composition but means that we have | |
2382 | just produced components (alternate chars and composition rules) of | |
2383 | the composition and the actual text follows in SRC. */ | |
2384 | ||
2385 | #define ENCODE_COMPOSITION_FAKE_START(coding) \ | |
2386 | do { \ | |
2387 | *dst++ = ISO_CODE_ESC; \ | |
2388 | *dst++ = '0'; \ | |
2389 | coding->composing = COMPOSITION_RELATIVE; \ | |
2390 | } while (0) | |
4ed46869 KH |
2391 | |
2392 | /* The following three macros produce codes for indicating direction | |
2393 | of text. */ | |
b73bfc1c KH |
2394 | #define ENCODE_CONTROL_SEQUENCE_INTRODUCER \ |
2395 | do { \ | |
4ed46869 | 2396 | if (coding->flags == CODING_FLAG_ISO_SEVEN_BITS) \ |
b73bfc1c KH |
2397 | *dst++ = ISO_CODE_ESC, *dst++ = '['; \ |
2398 | else \ | |
2399 | *dst++ = ISO_CODE_CSI; \ | |
4ed46869 KH |
2400 | } while (0) |
2401 | ||
2402 | #define ENCODE_DIRECTION_R2L \ | |
b73bfc1c | 2403 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst), *dst++ = '2', *dst++ = ']' |
4ed46869 KH |
2404 | |
2405 | #define ENCODE_DIRECTION_L2R \ | |
b73bfc1c | 2406 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst), *dst++ = '0', *dst++ = ']' |
4ed46869 KH |
2407 | |
2408 | /* Produce codes for designation and invocation to reset the graphic | |
2409 | planes and registers to initial state. */ | |
e0e989f6 KH |
2410 | #define ENCODE_RESET_PLANE_AND_REGISTER \ |
2411 | do { \ | |
2412 | int reg; \ | |
2413 | if (CODING_SPEC_ISO_INVOCATION (coding, 0) != 0) \ | |
2414 | ENCODE_SHIFT_IN; \ | |
2415 | for (reg = 0; reg < 4; reg++) \ | |
2416 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg) >= 0 \ | |
2417 | && (CODING_SPEC_ISO_DESIGNATION (coding, reg) \ | |
2418 | != CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg))) \ | |
2419 | ENCODE_DESIGNATION \ | |
2420 | (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg), reg, coding); \ | |
4ed46869 KH |
2421 | } while (0) |
2422 | ||
bdd9fb48 | 2423 | /* Produce designation sequences of charsets in the line started from |
b73bfc1c | 2424 | SRC to a place pointed by DST, and return updated DST. |
bdd9fb48 KH |
2425 | |
2426 | If the current block ends before any end-of-line, we may fail to | |
d46c5b12 KH |
2427 | find all the necessary designations. */ |
2428 | ||
b73bfc1c KH |
2429 | static unsigned char * |
2430 | encode_designation_at_bol (coding, translation_table, src, src_end, dst) | |
e0e989f6 | 2431 | struct coding_system *coding; |
b73bfc1c KH |
2432 | Lisp_Object translation_table; |
2433 | unsigned char *src, *src_end, *dst; | |
e0e989f6 | 2434 | { |
bdd9fb48 KH |
2435 | int charset, c, found = 0, reg; |
2436 | /* Table of charsets to be designated to each graphic register. */ | |
2437 | int r[4]; | |
bdd9fb48 KH |
2438 | |
2439 | for (reg = 0; reg < 4; reg++) | |
2440 | r[reg] = -1; | |
2441 | ||
b73bfc1c | 2442 | while (found < 4) |
e0e989f6 | 2443 | { |
b73bfc1c KH |
2444 | ONE_MORE_CHAR (c); |
2445 | if (c == '\n') | |
2446 | break; | |
93dec019 | 2447 | |
b73bfc1c | 2448 | charset = CHAR_CHARSET (c); |
e0e989f6 | 2449 | reg = CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset); |
d46c5b12 | 2450 | if (reg != CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION && r[reg] < 0) |
bdd9fb48 KH |
2451 | { |
2452 | found++; | |
2453 | r[reg] = charset; | |
2454 | } | |
bdd9fb48 KH |
2455 | } |
2456 | ||
b73bfc1c | 2457 | label_end_of_loop: |
bdd9fb48 KH |
2458 | if (found) |
2459 | { | |
2460 | for (reg = 0; reg < 4; reg++) | |
2461 | if (r[reg] >= 0 | |
2462 | && CODING_SPEC_ISO_DESIGNATION (coding, reg) != r[reg]) | |
2463 | ENCODE_DESIGNATION (r[reg], reg, coding); | |
e0e989f6 | 2464 | } |
b73bfc1c KH |
2465 | |
2466 | return dst; | |
e0e989f6 KH |
2467 | } |
2468 | ||
4ed46869 KH |
2469 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */ |
2470 | ||
b73bfc1c | 2471 | static void |
d46c5b12 | 2472 | encode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
2473 | struct coding_system *coding; |
2474 | unsigned char *source, *destination; | |
2475 | int src_bytes, dst_bytes; | |
4ed46869 KH |
2476 | { |
2477 | unsigned char *src = source; | |
2478 | unsigned char *src_end = source + src_bytes; | |
2479 | unsigned char *dst = destination; | |
2480 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c | 2481 | /* Since the maximum bytes produced by each loop is 20, we subtract 19 |
4ed46869 KH |
2482 | from DST_END to assure overflow checking is necessary only at the |
2483 | head of loop. */ | |
b73bfc1c KH |
2484 | unsigned char *adjusted_dst_end = dst_end - 19; |
2485 | /* SRC_BASE remembers the start position in source in each loop. | |
2486 | The loop will be exited when there's not enough source text to | |
2487 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
2488 | there's not enough destination area to produce encoded codes | |
2489 | (within macro EMIT_BYTES). */ | |
2490 | unsigned char *src_base; | |
2491 | int c; | |
2492 | Lisp_Object translation_table; | |
05e6f5dc KH |
2493 | Lisp_Object safe_chars; |
2494 | ||
2495 | safe_chars = coding_safe_chars (coding); | |
bdd9fb48 | 2496 | |
b73bfc1c KH |
2497 | if (NILP (Venable_character_translation)) |
2498 | translation_table = Qnil; | |
2499 | else | |
2500 | { | |
2501 | translation_table = coding->translation_table_for_encode; | |
2502 | if (NILP (translation_table)) | |
2503 | translation_table = Vstandard_translation_table_for_encode; | |
2504 | } | |
4ed46869 | 2505 | |
d46c5b12 | 2506 | coding->consumed_char = 0; |
b73bfc1c KH |
2507 | coding->errors = 0; |
2508 | while (1) | |
4ed46869 | 2509 | { |
b73bfc1c KH |
2510 | src_base = src; |
2511 | ||
2512 | if (dst >= (dst_bytes ? adjusted_dst_end : (src - 19))) | |
2513 | { | |
2514 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
2515 | break; | |
2516 | } | |
4ed46869 | 2517 | |
e0e989f6 KH |
2518 | if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL |
2519 | && CODING_SPEC_ISO_BOL (coding)) | |
2520 | { | |
bdd9fb48 | 2521 | /* We have to produce designation sequences if any now. */ |
b73bfc1c KH |
2522 | dst = encode_designation_at_bol (coding, translation_table, |
2523 | src, src_end, dst); | |
e0e989f6 KH |
2524 | CODING_SPEC_ISO_BOL (coding) = 0; |
2525 | } | |
2526 | ||
ec6d2bb8 KH |
2527 | /* Check composition start and end. */ |
2528 | if (coding->composing != COMPOSITION_DISABLED | |
2529 | && coding->cmp_data_start < coding->cmp_data->used) | |
4ed46869 | 2530 | { |
ec6d2bb8 KH |
2531 | struct composition_data *cmp_data = coding->cmp_data; |
2532 | int *data = cmp_data->data + coding->cmp_data_start; | |
2533 | int this_pos = cmp_data->char_offset + coding->consumed_char; | |
2534 | ||
2535 | if (coding->composing == COMPOSITION_RELATIVE) | |
4ed46869 | 2536 | { |
ec6d2bb8 KH |
2537 | if (this_pos == data[2]) |
2538 | { | |
2539 | ENCODE_COMPOSITION_END (coding, data); | |
2540 | cmp_data = coding->cmp_data; | |
2541 | data = cmp_data->data + coding->cmp_data_start; | |
2542 | } | |
4ed46869 | 2543 | } |
ec6d2bb8 | 2544 | else if (COMPOSING_P (coding)) |
4ed46869 | 2545 | { |
ec6d2bb8 KH |
2546 | /* COMPOSITION_WITH_ALTCHARS or COMPOSITION_WITH_RULE_ALTCHAR */ |
2547 | if (coding->cmp_data_index == coding->cmp_data_start + data[0]) | |
2548 | /* We have consumed components of the composition. | |
8ca3766a | 2549 | What follows in SRC is the composition's base |
ec6d2bb8 KH |
2550 | text. */ |
2551 | ENCODE_COMPOSITION_FAKE_START (coding); | |
2552 | else | |
4ed46869 | 2553 | { |
ec6d2bb8 KH |
2554 | int c = cmp_data->data[coding->cmp_data_index++]; |
2555 | if (coding->composition_rule_follows) | |
2556 | { | |
2557 | ENCODE_COMPOSITION_RULE (c); | |
2558 | coding->composition_rule_follows = 0; | |
2559 | } | |
2560 | else | |
2561 | { | |
05e6f5dc KH |
2562 | if (coding->flags & CODING_FLAG_ISO_SAFE |
2563 | && ! CODING_SAFE_CHAR_P (safe_chars, c)) | |
2564 | ENCODE_UNSAFE_CHARACTER (c); | |
2565 | else | |
2566 | ENCODE_ISO_CHARACTER (c); | |
ec6d2bb8 KH |
2567 | if (coding->composing == COMPOSITION_WITH_RULE_ALTCHARS) |
2568 | coding->composition_rule_follows = 1; | |
2569 | } | |
4ed46869 KH |
2570 | continue; |
2571 | } | |
ec6d2bb8 KH |
2572 | } |
2573 | if (!COMPOSING_P (coding)) | |
2574 | { | |
2575 | if (this_pos == data[1]) | |
4ed46869 | 2576 | { |
ec6d2bb8 KH |
2577 | ENCODE_COMPOSITION_START (coding, data); |
2578 | continue; | |
4ed46869 | 2579 | } |
4ed46869 KH |
2580 | } |
2581 | } | |
ec6d2bb8 | 2582 | |
b73bfc1c | 2583 | ONE_MORE_CHAR (c); |
4ed46869 | 2584 | |
b73bfc1c KH |
2585 | /* Now encode the character C. */ |
2586 | if (c < 0x20 || c == 0x7F) | |
2587 | { | |
2588 | if (c == '\r') | |
19a8d9e0 | 2589 | { |
b73bfc1c KH |
2590 | if (! (coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) |
2591 | { | |
2592 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL) | |
2593 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2594 | *dst++ = c; | |
2595 | continue; | |
2596 | } | |
2597 | /* fall down to treat '\r' as '\n' ... */ | |
2598 | c = '\n'; | |
19a8d9e0 | 2599 | } |
b73bfc1c | 2600 | if (c == '\n') |
19a8d9e0 | 2601 | { |
b73bfc1c KH |
2602 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_EOL) |
2603 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2604 | if (coding->flags & CODING_FLAG_ISO_INIT_AT_BOL) | |
2605 | bcopy (coding->spec.iso2022.initial_designation, | |
2606 | coding->spec.iso2022.current_designation, | |
2607 | sizeof coding->spec.iso2022.initial_designation); | |
2608 | if (coding->eol_type == CODING_EOL_LF | |
2609 | || coding->eol_type == CODING_EOL_UNDECIDED) | |
2610 | *dst++ = ISO_CODE_LF; | |
2611 | else if (coding->eol_type == CODING_EOL_CRLF) | |
2612 | *dst++ = ISO_CODE_CR, *dst++ = ISO_CODE_LF; | |
2613 | else | |
2614 | *dst++ = ISO_CODE_CR; | |
2615 | CODING_SPEC_ISO_BOL (coding) = 1; | |
19a8d9e0 | 2616 | } |
93dec019 | 2617 | else |
19a8d9e0 | 2618 | { |
b73bfc1c KH |
2619 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL) |
2620 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2621 | *dst++ = c; | |
19a8d9e0 | 2622 | } |
4ed46869 | 2623 | } |
b73bfc1c | 2624 | else if (ASCII_BYTE_P (c)) |
05e6f5dc | 2625 | ENCODE_ISO_CHARACTER (c); |
b73bfc1c | 2626 | else if (SINGLE_BYTE_CHAR_P (c)) |
88993dfd | 2627 | { |
b73bfc1c KH |
2628 | *dst++ = c; |
2629 | coding->errors++; | |
88993dfd | 2630 | } |
05e6f5dc KH |
2631 | else if (coding->flags & CODING_FLAG_ISO_SAFE |
2632 | && ! CODING_SAFE_CHAR_P (safe_chars, c)) | |
2633 | ENCODE_UNSAFE_CHARACTER (c); | |
b73bfc1c | 2634 | else |
05e6f5dc | 2635 | ENCODE_ISO_CHARACTER (c); |
b73bfc1c KH |
2636 | |
2637 | coding->consumed_char++; | |
84fbb8a0 | 2638 | } |
b73bfc1c KH |
2639 | |
2640 | label_end_of_loop: | |
2641 | coding->consumed = src_base - source; | |
d46c5b12 | 2642 | coding->produced = coding->produced_char = dst - destination; |
4ed46869 KH |
2643 | } |
2644 | ||
2645 | \f | |
2646 | /*** 4. SJIS and BIG5 handlers ***/ | |
2647 | ||
cfb43547 | 2648 | /* Although SJIS and BIG5 are not ISO coding systems, they are used |
4ed46869 KH |
2649 | quite widely. So, for the moment, Emacs supports them in the bare |
2650 | C code. But, in the future, they may be supported only by CCL. */ | |
2651 | ||
2652 | /* SJIS is a coding system encoding three character sets: ASCII, right | |
2653 | half of JISX0201-Kana, and JISX0208. An ASCII character is encoded | |
2654 | as is. A character of charset katakana-jisx0201 is encoded by | |
2655 | "position-code + 0x80". A character of charset japanese-jisx0208 | |
2656 | is encoded in 2-byte but two position-codes are divided and shifted | |
cfb43547 | 2657 | so that it fits in the range below. |
4ed46869 KH |
2658 | |
2659 | --- CODE RANGE of SJIS --- | |
2660 | (character set) (range) | |
2661 | ASCII 0x00 .. 0x7F | |
682169fe | 2662 | KATAKANA-JISX0201 0xA1 .. 0xDF |
c28a9453 | 2663 | JISX0208 (1st byte) 0x81 .. 0x9F and 0xE0 .. 0xEF |
d14d03ac | 2664 | (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC |
4ed46869 KH |
2665 | ------------------------------- |
2666 | ||
2667 | */ | |
2668 | ||
2669 | /* BIG5 is a coding system encoding two character sets: ASCII and | |
2670 | Big5. An ASCII character is encoded as is. Big5 is a two-byte | |
cfb43547 | 2671 | character set and is encoded in two bytes. |
4ed46869 KH |
2672 | |
2673 | --- CODE RANGE of BIG5 --- | |
2674 | (character set) (range) | |
2675 | ASCII 0x00 .. 0x7F | |
2676 | Big5 (1st byte) 0xA1 .. 0xFE | |
2677 | (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE | |
2678 | -------------------------- | |
2679 | ||
2680 | Since the number of characters in Big5 is larger than maximum | |
2681 | characters in Emacs' charset (96x96), it can't be handled as one | |
2682 | charset. So, in Emacs, Big5 is divided into two: `charset-big5-1' | |
2683 | and `charset-big5-2'. Both are DIMENSION2 and CHARS94. The former | |
2684 | contains frequently used characters and the latter contains less | |
2685 | frequently used characters. */ | |
2686 | ||
2687 | /* Macros to decode or encode a character of Big5 in BIG5. B1 and B2 | |
2688 | are the 1st and 2nd position-codes of Big5 in BIG5 coding system. | |
f458a8e0 | 2689 | C1 and C2 are the 1st and 2nd position-codes of Emacs' internal |
4ed46869 KH |
2690 | format. CHARSET is `charset_big5_1' or `charset_big5_2'. */ |
2691 | ||
2692 | /* Number of Big5 characters which have the same code in 1st byte. */ | |
2693 | #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40) | |
2694 | ||
2695 | #define DECODE_BIG5(b1, b2, charset, c1, c2) \ | |
2696 | do { \ | |
2697 | unsigned int temp \ | |
2698 | = (b1 - 0xA1) * BIG5_SAME_ROW + b2 - (b2 < 0x7F ? 0x40 : 0x62); \ | |
2699 | if (b1 < 0xC9) \ | |
2700 | charset = charset_big5_1; \ | |
2701 | else \ | |
2702 | { \ | |
2703 | charset = charset_big5_2; \ | |
2704 | temp -= (0xC9 - 0xA1) * BIG5_SAME_ROW; \ | |
2705 | } \ | |
2706 | c1 = temp / (0xFF - 0xA1) + 0x21; \ | |
2707 | c2 = temp % (0xFF - 0xA1) + 0x21; \ | |
2708 | } while (0) | |
2709 | ||
2710 | #define ENCODE_BIG5(charset, c1, c2, b1, b2) \ | |
2711 | do { \ | |
2712 | unsigned int temp = (c1 - 0x21) * (0xFF - 0xA1) + (c2 - 0x21); \ | |
2713 | if (charset == charset_big5_2) \ | |
2714 | temp += BIG5_SAME_ROW * (0xC9 - 0xA1); \ | |
2715 | b1 = temp / BIG5_SAME_ROW + 0xA1; \ | |
2716 | b2 = temp % BIG5_SAME_ROW; \ | |
2717 | b2 += b2 < 0x3F ? 0x40 : 0x62; \ | |
2718 | } while (0) | |
2719 | ||
2720 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2721 | Check if a text is encoded in SJIS. If it is, return | |
2722 | CODING_CATEGORY_MASK_SJIS, else return 0. */ | |
2723 | ||
0a28aafb KH |
2724 | static int |
2725 | detect_coding_sjis (src, src_end, multibytep) | |
4ed46869 | 2726 | unsigned char *src, *src_end; |
0a28aafb | 2727 | int multibytep; |
4ed46869 | 2728 | { |
b73bfc1c KH |
2729 | int c; |
2730 | /* Dummy for ONE_MORE_BYTE. */ | |
2731 | struct coding_system dummy_coding; | |
2732 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 2733 | |
b73bfc1c | 2734 | while (1) |
4ed46869 | 2735 | { |
0a28aafb | 2736 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
682169fe KH |
2737 | if (c < 0x80) |
2738 | continue; | |
2739 | if (c == 0x80 || c == 0xA0 || c > 0xEF) | |
2740 | return 0; | |
2741 | if (c <= 0x9F || c >= 0xE0) | |
4ed46869 | 2742 | { |
682169fe KH |
2743 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
2744 | if (c < 0x40 || c == 0x7F || c > 0xFC) | |
4ed46869 KH |
2745 | return 0; |
2746 | } | |
2747 | } | |
b73bfc1c | 2748 | label_end_of_loop: |
4ed46869 KH |
2749 | return CODING_CATEGORY_MASK_SJIS; |
2750 | } | |
2751 | ||
2752 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2753 | Check if a text is encoded in BIG5. If it is, return | |
2754 | CODING_CATEGORY_MASK_BIG5, else return 0. */ | |
2755 | ||
0a28aafb KH |
2756 | static int |
2757 | detect_coding_big5 (src, src_end, multibytep) | |
4ed46869 | 2758 | unsigned char *src, *src_end; |
0a28aafb | 2759 | int multibytep; |
4ed46869 | 2760 | { |
b73bfc1c KH |
2761 | int c; |
2762 | /* Dummy for ONE_MORE_BYTE. */ | |
2763 | struct coding_system dummy_coding; | |
2764 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 2765 | |
b73bfc1c | 2766 | while (1) |
4ed46869 | 2767 | { |
0a28aafb | 2768 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
682169fe KH |
2769 | if (c < 0x80) |
2770 | continue; | |
2771 | if (c < 0xA1 || c > 0xFE) | |
2772 | return 0; | |
2773 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); | |
2774 | if (c < 0x40 || (c > 0x7F && c < 0xA1) || c > 0xFE) | |
2775 | return 0; | |
4ed46869 | 2776 | } |
b73bfc1c | 2777 | label_end_of_loop: |
4ed46869 KH |
2778 | return CODING_CATEGORY_MASK_BIG5; |
2779 | } | |
2780 | ||
fa42c37f KH |
2781 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
2782 | Check if a text is encoded in UTF-8. If it is, return | |
2783 | CODING_CATEGORY_MASK_UTF_8, else return 0. */ | |
2784 | ||
2785 | #define UTF_8_1_OCTET_P(c) ((c) < 0x80) | |
2786 | #define UTF_8_EXTRA_OCTET_P(c) (((c) & 0xC0) == 0x80) | |
2787 | #define UTF_8_2_OCTET_LEADING_P(c) (((c) & 0xE0) == 0xC0) | |
2788 | #define UTF_8_3_OCTET_LEADING_P(c) (((c) & 0xF0) == 0xE0) | |
2789 | #define UTF_8_4_OCTET_LEADING_P(c) (((c) & 0xF8) == 0xF0) | |
2790 | #define UTF_8_5_OCTET_LEADING_P(c) (((c) & 0xFC) == 0xF8) | |
2791 | #define UTF_8_6_OCTET_LEADING_P(c) (((c) & 0xFE) == 0xFC) | |
2792 | ||
0a28aafb KH |
2793 | static int |
2794 | detect_coding_utf_8 (src, src_end, multibytep) | |
fa42c37f | 2795 | unsigned char *src, *src_end; |
0a28aafb | 2796 | int multibytep; |
fa42c37f KH |
2797 | { |
2798 | unsigned char c; | |
2799 | int seq_maybe_bytes; | |
b73bfc1c KH |
2800 | /* Dummy for ONE_MORE_BYTE. */ |
2801 | struct coding_system dummy_coding; | |
2802 | struct coding_system *coding = &dummy_coding; | |
fa42c37f | 2803 | |
b73bfc1c | 2804 | while (1) |
fa42c37f | 2805 | { |
0a28aafb | 2806 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
fa42c37f KH |
2807 | if (UTF_8_1_OCTET_P (c)) |
2808 | continue; | |
2809 | else if (UTF_8_2_OCTET_LEADING_P (c)) | |
2810 | seq_maybe_bytes = 1; | |
2811 | else if (UTF_8_3_OCTET_LEADING_P (c)) | |
2812 | seq_maybe_bytes = 2; | |
2813 | else if (UTF_8_4_OCTET_LEADING_P (c)) | |
2814 | seq_maybe_bytes = 3; | |
2815 | else if (UTF_8_5_OCTET_LEADING_P (c)) | |
2816 | seq_maybe_bytes = 4; | |
2817 | else if (UTF_8_6_OCTET_LEADING_P (c)) | |
2818 | seq_maybe_bytes = 5; | |
2819 | else | |
2820 | return 0; | |
2821 | ||
2822 | do | |
2823 | { | |
0a28aafb | 2824 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
fa42c37f KH |
2825 | if (!UTF_8_EXTRA_OCTET_P (c)) |
2826 | return 0; | |
2827 | seq_maybe_bytes--; | |
2828 | } | |
2829 | while (seq_maybe_bytes > 0); | |
2830 | } | |
2831 | ||
b73bfc1c | 2832 | label_end_of_loop: |
fa42c37f KH |
2833 | return CODING_CATEGORY_MASK_UTF_8; |
2834 | } | |
2835 | ||
2836 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2837 | Check if a text is encoded in UTF-16 Big Endian (endian == 1) or | |
2838 | Little Endian (otherwise). If it is, return | |
2839 | CODING_CATEGORY_MASK_UTF_16_BE or CODING_CATEGORY_MASK_UTF_16_LE, | |
2840 | else return 0. */ | |
2841 | ||
2842 | #define UTF_16_INVALID_P(val) \ | |
2843 | (((val) == 0xFFFE) \ | |
2844 | || ((val) == 0xFFFF)) | |
2845 | ||
2846 | #define UTF_16_HIGH_SURROGATE_P(val) \ | |
2847 | (((val) & 0xD800) == 0xD800) | |
2848 | ||
2849 | #define UTF_16_LOW_SURROGATE_P(val) \ | |
2850 | (((val) & 0xDC00) == 0xDC00) | |
2851 | ||
0a28aafb KH |
2852 | static int |
2853 | detect_coding_utf_16 (src, src_end, multibytep) | |
fa42c37f | 2854 | unsigned char *src, *src_end; |
0a28aafb | 2855 | int multibytep; |
fa42c37f | 2856 | { |
b73bfc1c KH |
2857 | unsigned char c1, c2; |
2858 | /* Dummy for TWO_MORE_BYTES. */ | |
2859 | struct coding_system dummy_coding; | |
2860 | struct coding_system *coding = &dummy_coding; | |
fa42c37f | 2861 | |
0a28aafb KH |
2862 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
2863 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c2, multibytep); | |
b73bfc1c KH |
2864 | |
2865 | if ((c1 == 0xFF) && (c2 == 0xFE)) | |
fa42c37f | 2866 | return CODING_CATEGORY_MASK_UTF_16_LE; |
b73bfc1c | 2867 | else if ((c1 == 0xFE) && (c2 == 0xFF)) |
fa42c37f KH |
2868 | return CODING_CATEGORY_MASK_UTF_16_BE; |
2869 | ||
b73bfc1c | 2870 | label_end_of_loop: |
fa42c37f KH |
2871 | return 0; |
2872 | } | |
2873 | ||
4ed46869 KH |
2874 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". |
2875 | If SJIS_P is 1, decode SJIS text, else decode BIG5 test. */ | |
2876 | ||
b73bfc1c | 2877 | static void |
4ed46869 | 2878 | decode_coding_sjis_big5 (coding, source, destination, |
d46c5b12 | 2879 | src_bytes, dst_bytes, sjis_p) |
4ed46869 KH |
2880 | struct coding_system *coding; |
2881 | unsigned char *source, *destination; | |
2882 | int src_bytes, dst_bytes; | |
4ed46869 KH |
2883 | int sjis_p; |
2884 | { | |
2885 | unsigned char *src = source; | |
2886 | unsigned char *src_end = source + src_bytes; | |
2887 | unsigned char *dst = destination; | |
2888 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c KH |
2889 | /* SRC_BASE remembers the start position in source in each loop. |
2890 | The loop will be exited when there's not enough source code | |
2891 | (within macro ONE_MORE_BYTE), or when there's not enough | |
2892 | destination area to produce a character (within macro | |
2893 | EMIT_CHAR). */ | |
2894 | unsigned char *src_base; | |
2895 | Lisp_Object translation_table; | |
a5d301df | 2896 | |
b73bfc1c KH |
2897 | if (NILP (Venable_character_translation)) |
2898 | translation_table = Qnil; | |
2899 | else | |
2900 | { | |
2901 | translation_table = coding->translation_table_for_decode; | |
2902 | if (NILP (translation_table)) | |
2903 | translation_table = Vstandard_translation_table_for_decode; | |
2904 | } | |
4ed46869 | 2905 | |
d46c5b12 | 2906 | coding->produced_char = 0; |
b73bfc1c | 2907 | while (1) |
4ed46869 | 2908 | { |
b73bfc1c KH |
2909 | int c, charset, c1, c2; |
2910 | ||
2911 | src_base = src; | |
2912 | ONE_MORE_BYTE (c1); | |
2913 | ||
2914 | if (c1 < 0x80) | |
4ed46869 | 2915 | { |
b73bfc1c KH |
2916 | charset = CHARSET_ASCII; |
2917 | if (c1 < 0x20) | |
4ed46869 | 2918 | { |
b73bfc1c | 2919 | if (c1 == '\r') |
d46c5b12 | 2920 | { |
b73bfc1c | 2921 | if (coding->eol_type == CODING_EOL_CRLF) |
d46c5b12 | 2922 | { |
b73bfc1c KH |
2923 | ONE_MORE_BYTE (c2); |
2924 | if (c2 == '\n') | |
2925 | c1 = c2; | |
b73bfc1c KH |
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); | |
93dec019 | 3034 | |
b73bfc1c KH |
3035 | /* Now encode the character C. */ |
3036 | if (SINGLE_BYTE_CHAR_P (c)) | |
3037 | { | |
3038 | switch (c) | |
4ed46869 | 3039 | { |
b73bfc1c | 3040 | case '\r': |
7371fe0a | 3041 | if (!(coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) |
b73bfc1c KH |
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 | { | |
b73bfc1c KH |
3171 | src--; |
3172 | c = '\r'; | |
3173 | } | |
fb88bf2d | 3174 | } |
b73bfc1c KH |
3175 | else if (c == '\n' |
3176 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL)) | |
d46c5b12 | 3177 | { |
b73bfc1c KH |
3178 | coding->result = CODING_FINISH_INCONSISTENT_EOL; |
3179 | goto label_end_of_loop; | |
d46c5b12 | 3180 | } |
b73bfc1c | 3181 | EMIT_CHAR (c); |
d46c5b12 | 3182 | } |
b73bfc1c KH |
3183 | break; |
3184 | ||
3185 | case CODING_EOL_CR: | |
3186 | while (1) | |
d46c5b12 | 3187 | { |
b73bfc1c KH |
3188 | src_base = src; |
3189 | ONE_MORE_BYTE (c); | |
3190 | if (c == '\n') | |
3191 | { | |
3192 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
3193 | { | |
3194 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
3195 | goto label_end_of_loop; | |
3196 | } | |
3197 | } | |
3198 | else if (c == '\r') | |
3199 | c = '\n'; | |
3200 | EMIT_CHAR (c); | |
d46c5b12 | 3201 | } |
4ed46869 KH |
3202 | break; |
3203 | ||
b73bfc1c KH |
3204 | default: /* no need for EOL handling */ |
3205 | while (1) | |
d46c5b12 | 3206 | { |
b73bfc1c KH |
3207 | src_base = src; |
3208 | ONE_MORE_BYTE (c); | |
3209 | EMIT_CHAR (c); | |
d46c5b12 | 3210 | } |
4ed46869 KH |
3211 | } |
3212 | ||
b73bfc1c KH |
3213 | label_end_of_loop: |
3214 | coding->consumed = coding->consumed_char = src_base - source; | |
3215 | coding->produced = dst - destination; | |
3216 | return; | |
4ed46869 KH |
3217 | } |
3218 | ||
3219 | /* See "GENERAL NOTES about `encode_coding_XXX ()' functions". Encode | |
b73bfc1c | 3220 | format of end-of-line according to `coding->eol_type'. It also |
8ca3766a | 3221 | convert multibyte form 8-bit characters to unibyte if |
b73bfc1c KH |
3222 | CODING->src_multibyte is nonzero. If `coding->mode & |
3223 | CODING_MODE_SELECTIVE_DISPLAY' is nonzero, code '\r' in source text | |
3224 | also means end-of-line. */ | |
4ed46869 | 3225 | |
b73bfc1c | 3226 | static void |
d46c5b12 | 3227 | encode_eol (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 3228 | struct coding_system *coding; |
a4244313 KR |
3229 | const unsigned char *source; |
3230 | unsigned char *destination; | |
4ed46869 | 3231 | int src_bytes, dst_bytes; |
4ed46869 | 3232 | { |
a4244313 | 3233 | const unsigned char *src = source; |
4ed46869 | 3234 | unsigned char *dst = destination; |
a4244313 | 3235 | const unsigned char *src_end = src + src_bytes; |
b73bfc1c KH |
3236 | unsigned char *dst_end = dst + dst_bytes; |
3237 | Lisp_Object translation_table; | |
3238 | /* SRC_BASE remembers the start position in source in each loop. | |
3239 | The loop will be exited when there's not enough source text to | |
3240 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
3241 | there's not enough destination area to produce encoded codes | |
3242 | (within macro EMIT_BYTES). */ | |
a4244313 KR |
3243 | const unsigned char *src_base; |
3244 | unsigned char *tmp; | |
b73bfc1c KH |
3245 | int c; |
3246 | int selective_display = coding->mode & CODING_MODE_SELECTIVE_DISPLAY; | |
3247 | ||
3248 | translation_table = Qnil; | |
3249 | if (coding->src_multibyte | |
3250 | && *(src_end - 1) == LEADING_CODE_8_BIT_CONTROL) | |
3251 | { | |
3252 | src_end--; | |
3253 | src_bytes--; | |
3254 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; | |
3255 | } | |
fb88bf2d | 3256 | |
d46c5b12 KH |
3257 | if (coding->eol_type == CODING_EOL_CRLF) |
3258 | { | |
b73bfc1c | 3259 | while (src < src_end) |
d46c5b12 | 3260 | { |
b73bfc1c | 3261 | src_base = src; |
d46c5b12 | 3262 | c = *src++; |
b73bfc1c KH |
3263 | if (c >= 0x20) |
3264 | EMIT_ONE_BYTE (c); | |
3265 | else if (c == '\n' || (c == '\r' && selective_display)) | |
3266 | EMIT_TWO_BYTES ('\r', '\n'); | |
d46c5b12 | 3267 | else |
b73bfc1c | 3268 | EMIT_ONE_BYTE (c); |
d46c5b12 | 3269 | } |
ff2b1ea9 | 3270 | src_base = src; |
b73bfc1c | 3271 | label_end_of_loop: |
005f0d35 | 3272 | ; |
d46c5b12 KH |
3273 | } |
3274 | else | |
4ed46869 | 3275 | { |
78a629d2 | 3276 | if (!dst_bytes || src_bytes <= dst_bytes) |
4ed46869 | 3277 | { |
b73bfc1c KH |
3278 | safe_bcopy (src, dst, src_bytes); |
3279 | src_base = src_end; | |
3280 | dst += src_bytes; | |
d46c5b12 | 3281 | } |
d46c5b12 | 3282 | else |
b73bfc1c KH |
3283 | { |
3284 | if (coding->src_multibyte | |
3285 | && *(src + dst_bytes - 1) == LEADING_CODE_8_BIT_CONTROL) | |
3286 | dst_bytes--; | |
3287 | safe_bcopy (src, dst, dst_bytes); | |
3288 | src_base = src + dst_bytes; | |
3289 | dst = destination + dst_bytes; | |
3290 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
3291 | } | |
993824c9 | 3292 | if (coding->eol_type == CODING_EOL_CR) |
d46c5b12 | 3293 | { |
a4244313 KR |
3294 | for (tmp = destination; tmp < dst; tmp++) |
3295 | if (*tmp == '\n') *tmp = '\r'; | |
d46c5b12 | 3296 | } |
b73bfc1c | 3297 | else if (selective_display) |
d46c5b12 | 3298 | { |
a4244313 KR |
3299 | for (tmp = destination; tmp < dst; tmp++) |
3300 | if (*tmp == '\r') *tmp = '\n'; | |
4ed46869 | 3301 | } |
4ed46869 | 3302 | } |
b73bfc1c KH |
3303 | if (coding->src_multibyte) |
3304 | dst = destination + str_as_unibyte (destination, dst - destination); | |
4ed46869 | 3305 | |
b73bfc1c KH |
3306 | coding->consumed = src_base - source; |
3307 | coding->produced = dst - destination; | |
78a629d2 | 3308 | coding->produced_char = coding->produced; |
4ed46869 KH |
3309 | } |
3310 | ||
3311 | \f | |
1397dc18 | 3312 | /*** 7. C library functions ***/ |
4ed46869 | 3313 | |
cfb43547 | 3314 | /* In Emacs Lisp, a coding system is represented by a Lisp symbol which |
4ed46869 | 3315 | has a property `coding-system'. The value of this property is a |
cfb43547 | 3316 | vector of length 5 (called the coding-vector). Among elements of |
4ed46869 KH |
3317 | this vector, the first (element[0]) and the fifth (element[4]) |
3318 | carry important information for decoding/encoding. Before | |
3319 | decoding/encoding, this information should be set in fields of a | |
3320 | structure of type `coding_system'. | |
3321 | ||
cfb43547 | 3322 | The value of the property `coding-system' can be a symbol of another |
4ed46869 KH |
3323 | subsidiary coding-system. In that case, Emacs gets coding-vector |
3324 | from that symbol. | |
3325 | ||
3326 | `element[0]' contains information to be set in `coding->type'. The | |
3327 | value and its meaning is as follows: | |
3328 | ||
0ef69138 KH |
3329 | 0 -- coding_type_emacs_mule |
3330 | 1 -- coding_type_sjis | |
3331 | 2 -- coding_type_iso2022 | |
3332 | 3 -- coding_type_big5 | |
3333 | 4 -- coding_type_ccl encoder/decoder written in CCL | |
3334 | nil -- coding_type_no_conversion | |
3335 | t -- coding_type_undecided (automatic conversion on decoding, | |
3336 | no-conversion on encoding) | |
4ed46869 KH |
3337 | |
3338 | `element[4]' contains information to be set in `coding->flags' and | |
3339 | `coding->spec'. The meaning varies by `coding->type'. | |
3340 | ||
3341 | If `coding->type' is `coding_type_iso2022', element[4] is a vector | |
3342 | of length 32 (of which the first 13 sub-elements are used now). | |
3343 | Meanings of these sub-elements are: | |
3344 | ||
3345 | sub-element[N] where N is 0 through 3: to be set in `coding->spec.iso2022' | |
3346 | If the value is an integer of valid charset, the charset is | |
3347 | assumed to be designated to graphic register N initially. | |
3348 | ||
3349 | If the value is minus, it is a minus value of charset which | |
3350 | reserves graphic register N, which means that the charset is | |
3351 | not designated initially but should be designated to graphic | |
3352 | register N just before encoding a character in that charset. | |
3353 | ||
3354 | If the value is nil, graphic register N is never used on | |
3355 | encoding. | |
93dec019 | 3356 | |
4ed46869 KH |
3357 | sub-element[N] where N is 4 through 11: to be set in `coding->flags' |
3358 | Each value takes t or nil. See the section ISO2022 of | |
3359 | `coding.h' for more information. | |
3360 | ||
3361 | If `coding->type' is `coding_type_big5', element[4] is t to denote | |
3362 | BIG5-ETen or nil to denote BIG5-HKU. | |
3363 | ||
3364 | If `coding->type' takes the other value, element[4] is ignored. | |
3365 | ||
cfb43547 | 3366 | Emacs Lisp's coding systems also carry information about format of |
4ed46869 KH |
3367 | end-of-line in a value of property `eol-type'. If the value is |
3368 | integer, 0 means CODING_EOL_LF, 1 means CODING_EOL_CRLF, and 2 | |
3369 | means CODING_EOL_CR. If it is not integer, it should be a vector | |
3370 | of subsidiary coding systems of which property `eol-type' has one | |
cfb43547 | 3371 | of the above values. |
4ed46869 KH |
3372 | |
3373 | */ | |
3374 | ||
3375 | /* Extract information for decoding/encoding from CODING_SYSTEM_SYMBOL | |
3376 | and set it in CODING. If CODING_SYSTEM_SYMBOL is invalid, CODING | |
3377 | is setup so that no conversion is necessary and return -1, else | |
3378 | return 0. */ | |
3379 | ||
3380 | int | |
e0e989f6 KH |
3381 | setup_coding_system (coding_system, coding) |
3382 | Lisp_Object coding_system; | |
4ed46869 KH |
3383 | struct coding_system *coding; |
3384 | { | |
d46c5b12 | 3385 | Lisp_Object coding_spec, coding_type, eol_type, plist; |
4608c386 | 3386 | Lisp_Object val; |
4ed46869 | 3387 | |
c07c8e12 KH |
3388 | /* At first, zero clear all members. */ |
3389 | bzero (coding, sizeof (struct coding_system)); | |
3390 | ||
d46c5b12 | 3391 | /* Initialize some fields required for all kinds of coding systems. */ |
774324d6 | 3392 | coding->symbol = coding_system; |
d46c5b12 KH |
3393 | coding->heading_ascii = -1; |
3394 | coding->post_read_conversion = coding->pre_write_conversion = Qnil; | |
ec6d2bb8 KH |
3395 | coding->composing = COMPOSITION_DISABLED; |
3396 | coding->cmp_data = NULL; | |
1f5dbf34 KH |
3397 | |
3398 | if (NILP (coding_system)) | |
3399 | goto label_invalid_coding_system; | |
3400 | ||
4608c386 | 3401 | coding_spec = Fget (coding_system, Qcoding_system); |
1f5dbf34 | 3402 | |
4608c386 KH |
3403 | if (!VECTORP (coding_spec) |
3404 | || XVECTOR (coding_spec)->size != 5 | |
3405 | || !CONSP (XVECTOR (coding_spec)->contents[3])) | |
4ed46869 | 3406 | goto label_invalid_coding_system; |
4608c386 | 3407 | |
d46c5b12 KH |
3408 | eol_type = inhibit_eol_conversion ? Qnil : Fget (coding_system, Qeol_type); |
3409 | if (VECTORP (eol_type)) | |
3410 | { | |
3411 | coding->eol_type = CODING_EOL_UNDECIDED; | |
3412 | coding->common_flags = CODING_REQUIRE_DETECTION_MASK; | |
3413 | } | |
3414 | else if (XFASTINT (eol_type) == 1) | |
3415 | { | |
3416 | coding->eol_type = CODING_EOL_CRLF; | |
3417 | coding->common_flags | |
3418 | = CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
3419 | } | |
3420 | else if (XFASTINT (eol_type) == 2) | |
3421 | { | |
3422 | coding->eol_type = CODING_EOL_CR; | |
3423 | coding->common_flags | |
3424 | = CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
3425 | } | |
3426 | else | |
3427 | coding->eol_type = CODING_EOL_LF; | |
3428 | ||
3429 | coding_type = XVECTOR (coding_spec)->contents[0]; | |
3430 | /* Try short cut. */ | |
3431 | if (SYMBOLP (coding_type)) | |
3432 | { | |
3433 | if (EQ (coding_type, Qt)) | |
3434 | { | |
3435 | coding->type = coding_type_undecided; | |
3436 | coding->common_flags |= CODING_REQUIRE_DETECTION_MASK; | |
3437 | } | |
3438 | else | |
3439 | coding->type = coding_type_no_conversion; | |
9b96232f KH |
3440 | /* Initialize this member. Any thing other than |
3441 | CODING_CATEGORY_IDX_UTF_16_BE and | |
3442 | CODING_CATEGORY_IDX_UTF_16_LE are ok because they have | |
3443 | special treatment in detect_eol. */ | |
3444 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
3445 | ||
d46c5b12 KH |
3446 | return 0; |
3447 | } | |
3448 | ||
d46c5b12 KH |
3449 | /* Get values of coding system properties: |
3450 | `post-read-conversion', `pre-write-conversion', | |
f967223b | 3451 | `translation-table-for-decode', `translation-table-for-encode'. */ |
4608c386 | 3452 | plist = XVECTOR (coding_spec)->contents[3]; |
b843d1ae | 3453 | /* Pre & post conversion functions should be disabled if |
8ca3766a | 3454 | inhibit_eol_conversion is nonzero. This is the case that a code |
b843d1ae KH |
3455 | conversion function is called while those functions are running. */ |
3456 | if (! inhibit_pre_post_conversion) | |
3457 | { | |
3458 | coding->post_read_conversion = Fplist_get (plist, Qpost_read_conversion); | |
3459 | coding->pre_write_conversion = Fplist_get (plist, Qpre_write_conversion); | |
3460 | } | |
f967223b | 3461 | val = Fplist_get (plist, Qtranslation_table_for_decode); |
4608c386 | 3462 | if (SYMBOLP (val)) |
f967223b KH |
3463 | val = Fget (val, Qtranslation_table_for_decode); |
3464 | coding->translation_table_for_decode = CHAR_TABLE_P (val) ? val : Qnil; | |
3465 | val = Fplist_get (plist, Qtranslation_table_for_encode); | |
4608c386 | 3466 | if (SYMBOLP (val)) |
f967223b KH |
3467 | val = Fget (val, Qtranslation_table_for_encode); |
3468 | coding->translation_table_for_encode = CHAR_TABLE_P (val) ? val : Qnil; | |
d46c5b12 KH |
3469 | val = Fplist_get (plist, Qcoding_category); |
3470 | if (!NILP (val)) | |
3471 | { | |
3472 | val = Fget (val, Qcoding_category_index); | |
3473 | if (INTEGERP (val)) | |
3474 | coding->category_idx = XINT (val); | |
3475 | else | |
3476 | goto label_invalid_coding_system; | |
3477 | } | |
3478 | else | |
3479 | goto label_invalid_coding_system; | |
93dec019 | 3480 | |
ec6d2bb8 KH |
3481 | /* If the coding system has non-nil `composition' property, enable |
3482 | composition handling. */ | |
3483 | val = Fplist_get (plist, Qcomposition); | |
3484 | if (!NILP (val)) | |
3485 | coding->composing = COMPOSITION_NO; | |
3486 | ||
d46c5b12 | 3487 | switch (XFASTINT (coding_type)) |
4ed46869 KH |
3488 | { |
3489 | case 0: | |
0ef69138 | 3490 | coding->type = coding_type_emacs_mule; |
aa72b389 KH |
3491 | coding->common_flags |
3492 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
c952af22 KH |
3493 | if (!NILP (coding->post_read_conversion)) |
3494 | coding->common_flags |= CODING_REQUIRE_DECODING_MASK; | |
3495 | if (!NILP (coding->pre_write_conversion)) | |
3496 | coding->common_flags |= CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 KH |
3497 | break; |
3498 | ||
3499 | case 1: | |
3500 | coding->type = coding_type_sjis; | |
c952af22 KH |
3501 | coding->common_flags |
3502 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 KH |
3503 | break; |
3504 | ||
3505 | case 2: | |
3506 | coding->type = coding_type_iso2022; | |
c952af22 KH |
3507 | coding->common_flags |
3508 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3509 | { |
70c22245 | 3510 | Lisp_Object val, temp; |
4ed46869 | 3511 | Lisp_Object *flags; |
d46c5b12 | 3512 | int i, charset, reg_bits = 0; |
4ed46869 | 3513 | |
4608c386 | 3514 | val = XVECTOR (coding_spec)->contents[4]; |
f44d27ce | 3515 | |
4ed46869 KH |
3516 | if (!VECTORP (val) || XVECTOR (val)->size != 32) |
3517 | goto label_invalid_coding_system; | |
3518 | ||
3519 | flags = XVECTOR (val)->contents; | |
3520 | coding->flags | |
3521 | = ((NILP (flags[4]) ? 0 : CODING_FLAG_ISO_SHORT_FORM) | |
3522 | | (NILP (flags[5]) ? 0 : CODING_FLAG_ISO_RESET_AT_EOL) | |
3523 | | (NILP (flags[6]) ? 0 : CODING_FLAG_ISO_RESET_AT_CNTL) | |
3524 | | (NILP (flags[7]) ? 0 : CODING_FLAG_ISO_SEVEN_BITS) | |
3525 | | (NILP (flags[8]) ? 0 : CODING_FLAG_ISO_LOCKING_SHIFT) | |
3526 | | (NILP (flags[9]) ? 0 : CODING_FLAG_ISO_SINGLE_SHIFT) | |
3527 | | (NILP (flags[10]) ? 0 : CODING_FLAG_ISO_USE_ROMAN) | |
3528 | | (NILP (flags[11]) ? 0 : CODING_FLAG_ISO_USE_OLDJIS) | |
e0e989f6 KH |
3529 | | (NILP (flags[12]) ? 0 : CODING_FLAG_ISO_NO_DIRECTION) |
3530 | | (NILP (flags[13]) ? 0 : CODING_FLAG_ISO_INIT_AT_BOL) | |
c4825358 KH |
3531 | | (NILP (flags[14]) ? 0 : CODING_FLAG_ISO_DESIGNATE_AT_BOL) |
3532 | | (NILP (flags[15]) ? 0 : CODING_FLAG_ISO_SAFE) | |
3f003981 | 3533 | | (NILP (flags[16]) ? 0 : CODING_FLAG_ISO_LATIN_EXTRA) |
c4825358 | 3534 | ); |
4ed46869 KH |
3535 | |
3536 | /* Invoke graphic register 0 to plane 0. */ | |
3537 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; | |
3538 | /* Invoke graphic register 1 to plane 1 if we can use full 8-bit. */ | |
3539 | CODING_SPEC_ISO_INVOCATION (coding, 1) | |
3540 | = (coding->flags & CODING_FLAG_ISO_SEVEN_BITS ? -1 : 1); | |
3541 | /* Not single shifting at first. */ | |
6e85d753 | 3542 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; |
e0e989f6 | 3543 | /* Beginning of buffer should also be regarded as bol. */ |
6e85d753 | 3544 | CODING_SPEC_ISO_BOL (coding) = 1; |
4ed46869 | 3545 | |
70c22245 KH |
3546 | for (charset = 0; charset <= MAX_CHARSET; charset++) |
3547 | CODING_SPEC_ISO_REVISION_NUMBER (coding, charset) = 255; | |
3548 | val = Vcharset_revision_alist; | |
3549 | while (CONSP (val)) | |
3550 | { | |
03699b14 | 3551 | charset = get_charset_id (Fcar_safe (XCAR (val))); |
70c22245 | 3552 | if (charset >= 0 |
03699b14 | 3553 | && (temp = Fcdr_safe (XCAR (val)), INTEGERP (temp)) |
70c22245 KH |
3554 | && (i = XINT (temp), (i >= 0 && (i + '@') < 128))) |
3555 | CODING_SPEC_ISO_REVISION_NUMBER (coding, charset) = i; | |
03699b14 | 3556 | val = XCDR (val); |
70c22245 KH |
3557 | } |
3558 | ||
4ed46869 KH |
3559 | /* Checks FLAGS[REG] (REG = 0, 1, 2 3) and decide designations. |
3560 | FLAGS[REG] can be one of below: | |
3561 | integer CHARSET: CHARSET occupies register I, | |
3562 | t: designate nothing to REG initially, but can be used | |
3563 | by any charsets, | |
3564 | list of integer, nil, or t: designate the first | |
3565 | element (if integer) to REG initially, the remaining | |
3566 | elements (if integer) is designated to REG on request, | |
d46c5b12 | 3567 | if an element is t, REG can be used by any charsets, |
4ed46869 | 3568 | nil: REG is never used. */ |
467e7675 | 3569 | for (charset = 0; charset <= MAX_CHARSET; charset++) |
1ba9e4ab KH |
3570 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3571 | = CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION; | |
4ed46869 KH |
3572 | for (i = 0; i < 4; i++) |
3573 | { | |
87323294 PJ |
3574 | if ((INTEGERP (flags[i]) |
3575 | && (charset = XINT (flags[i]), CHARSET_VALID_P (charset))) | |
e0e989f6 | 3576 | || (charset = get_charset_id (flags[i])) >= 0) |
4ed46869 KH |
3577 | { |
3578 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = charset; | |
3579 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) = i; | |
3580 | } | |
3581 | else if (EQ (flags[i], Qt)) | |
3582 | { | |
3583 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
d46c5b12 KH |
3584 | reg_bits |= 1 << i; |
3585 | coding->flags |= CODING_FLAG_ISO_DESIGNATION; | |
4ed46869 KH |
3586 | } |
3587 | else if (CONSP (flags[i])) | |
3588 | { | |
84d60297 RS |
3589 | Lisp_Object tail; |
3590 | tail = flags[i]; | |
4ed46869 | 3591 | |
d46c5b12 | 3592 | coding->flags |= CODING_FLAG_ISO_DESIGNATION; |
87323294 PJ |
3593 | if ((INTEGERP (XCAR (tail)) |
3594 | && (charset = XINT (XCAR (tail)), | |
3595 | CHARSET_VALID_P (charset))) | |
03699b14 | 3596 | || (charset = get_charset_id (XCAR (tail))) >= 0) |
4ed46869 KH |
3597 | { |
3598 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = charset; | |
3599 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) =i; | |
3600 | } | |
3601 | else | |
3602 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
03699b14 | 3603 | tail = XCDR (tail); |
4ed46869 KH |
3604 | while (CONSP (tail)) |
3605 | { | |
87323294 PJ |
3606 | if ((INTEGERP (XCAR (tail)) |
3607 | && (charset = XINT (XCAR (tail)), | |
3608 | CHARSET_VALID_P (charset))) | |
03699b14 | 3609 | || (charset = get_charset_id (XCAR (tail))) >= 0) |
70c22245 KH |
3610 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3611 | = i; | |
03699b14 | 3612 | else if (EQ (XCAR (tail), Qt)) |
d46c5b12 | 3613 | reg_bits |= 1 << i; |
03699b14 | 3614 | tail = XCDR (tail); |
4ed46869 KH |
3615 | } |
3616 | } | |
3617 | else | |
3618 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
93dec019 | 3619 | |
4ed46869 KH |
3620 | CODING_SPEC_ISO_DESIGNATION (coding, i) |
3621 | = CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i); | |
3622 | } | |
3623 | ||
d46c5b12 | 3624 | if (reg_bits && ! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)) |
4ed46869 KH |
3625 | { |
3626 | /* REG 1 can be used only by locking shift in 7-bit env. */ | |
3627 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) | |
d46c5b12 | 3628 | reg_bits &= ~2; |
4ed46869 KH |
3629 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
3630 | /* Without any shifting, only REG 0 and 1 can be used. */ | |
d46c5b12 | 3631 | reg_bits &= 3; |
4ed46869 KH |
3632 | } |
3633 | ||
d46c5b12 KH |
3634 | if (reg_bits) |
3635 | for (charset = 0; charset <= MAX_CHARSET; charset++) | |
6e85d753 | 3636 | { |
928a85c1 | 3637 | if (CHARSET_DEFINED_P (charset) |
96148065 KH |
3638 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3639 | == CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION)) | |
d46c5b12 KH |
3640 | { |
3641 | /* There exist some default graphic registers to be | |
96148065 | 3642 | used by CHARSET. */ |
d46c5b12 KH |
3643 | |
3644 | /* We had better avoid designating a charset of | |
3645 | CHARS96 to REG 0 as far as possible. */ | |
3646 | if (CHARSET_CHARS (charset) == 96) | |
3647 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) | |
3648 | = (reg_bits & 2 | |
3649 | ? 1 : (reg_bits & 4 ? 2 : (reg_bits & 8 ? 3 : 0))); | |
3650 | else | |
3651 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) | |
3652 | = (reg_bits & 1 | |
3653 | ? 0 : (reg_bits & 2 ? 1 : (reg_bits & 4 ? 2 : 3))); | |
3654 | } | |
6e85d753 | 3655 | } |
4ed46869 | 3656 | } |
c952af22 | 3657 | coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK; |
d46c5b12 | 3658 | coding->spec.iso2022.last_invalid_designation_register = -1; |
4ed46869 KH |
3659 | break; |
3660 | ||
3661 | case 3: | |
3662 | coding->type = coding_type_big5; | |
c952af22 KH |
3663 | coding->common_flags |
3664 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3665 | coding->flags |
4608c386 | 3666 | = (NILP (XVECTOR (coding_spec)->contents[4]) |
4ed46869 KH |
3667 | ? CODING_FLAG_BIG5_HKU |
3668 | : CODING_FLAG_BIG5_ETEN); | |
3669 | break; | |
3670 | ||
3671 | case 4: | |
3672 | coding->type = coding_type_ccl; | |
c952af22 KH |
3673 | coding->common_flags |
3674 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3675 | { |
84d60297 | 3676 | val = XVECTOR (coding_spec)->contents[4]; |
ef4ced28 KH |
3677 | if (! CONSP (val) |
3678 | || setup_ccl_program (&(coding->spec.ccl.decoder), | |
03699b14 | 3679 | XCAR (val)) < 0 |
ef4ced28 | 3680 | || setup_ccl_program (&(coding->spec.ccl.encoder), |
03699b14 | 3681 | XCDR (val)) < 0) |
4ed46869 | 3682 | goto label_invalid_coding_system; |
1397dc18 KH |
3683 | |
3684 | bzero (coding->spec.ccl.valid_codes, 256); | |
3685 | val = Fplist_get (plist, Qvalid_codes); | |
3686 | if (CONSP (val)) | |
3687 | { | |
3688 | Lisp_Object this; | |
3689 | ||
03699b14 | 3690 | for (; CONSP (val); val = XCDR (val)) |
1397dc18 | 3691 | { |
03699b14 | 3692 | this = XCAR (val); |
1397dc18 KH |
3693 | if (INTEGERP (this) |
3694 | && XINT (this) >= 0 && XINT (this) < 256) | |
3695 | coding->spec.ccl.valid_codes[XINT (this)] = 1; | |
3696 | else if (CONSP (this) | |
03699b14 KR |
3697 | && INTEGERP (XCAR (this)) |
3698 | && INTEGERP (XCDR (this))) | |
1397dc18 | 3699 | { |
03699b14 KR |
3700 | int start = XINT (XCAR (this)); |
3701 | int end = XINT (XCDR (this)); | |
1397dc18 KH |
3702 | |
3703 | if (start >= 0 && start <= end && end < 256) | |
e133c8fa | 3704 | while (start <= end) |
1397dc18 KH |
3705 | coding->spec.ccl.valid_codes[start++] = 1; |
3706 | } | |
3707 | } | |
3708 | } | |
4ed46869 | 3709 | } |
c952af22 | 3710 | coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK; |
aaaf0b1e | 3711 | coding->spec.ccl.cr_carryover = 0; |
1c3478b0 | 3712 | coding->spec.ccl.eight_bit_carryover[0] = 0; |
4ed46869 KH |
3713 | break; |
3714 | ||
27901516 KH |
3715 | case 5: |
3716 | coding->type = coding_type_raw_text; | |
3717 | break; | |
3718 | ||
4ed46869 | 3719 | default: |
d46c5b12 | 3720 | goto label_invalid_coding_system; |
4ed46869 KH |
3721 | } |
3722 | return 0; | |
3723 | ||
3724 | label_invalid_coding_system: | |
3725 | coding->type = coding_type_no_conversion; | |
d46c5b12 | 3726 | coding->category_idx = CODING_CATEGORY_IDX_BINARY; |
c952af22 | 3727 | coding->common_flags = 0; |
dec137e5 | 3728 | coding->eol_type = CODING_EOL_LF; |
d46c5b12 | 3729 | coding->pre_write_conversion = coding->post_read_conversion = Qnil; |
4ed46869 KH |
3730 | return -1; |
3731 | } | |
3732 | ||
ec6d2bb8 KH |
3733 | /* Free memory blocks allocated for storing composition information. */ |
3734 | ||
3735 | void | |
3736 | coding_free_composition_data (coding) | |
3737 | struct coding_system *coding; | |
3738 | { | |
3739 | struct composition_data *cmp_data = coding->cmp_data, *next; | |
3740 | ||
3741 | if (!cmp_data) | |
3742 | return; | |
3743 | /* Memory blocks are chained. At first, rewind to the first, then, | |
3744 | free blocks one by one. */ | |
3745 | while (cmp_data->prev) | |
3746 | cmp_data = cmp_data->prev; | |
3747 | while (cmp_data) | |
3748 | { | |
3749 | next = cmp_data->next; | |
3750 | xfree (cmp_data); | |
3751 | cmp_data = next; | |
3752 | } | |
3753 | coding->cmp_data = NULL; | |
3754 | } | |
3755 | ||
3756 | /* Set `char_offset' member of all memory blocks pointed by | |
3757 | coding->cmp_data to POS. */ | |
3758 | ||
3759 | void | |
3760 | coding_adjust_composition_offset (coding, pos) | |
3761 | struct coding_system *coding; | |
3762 | int pos; | |
3763 | { | |
3764 | struct composition_data *cmp_data; | |
3765 | ||
3766 | for (cmp_data = coding->cmp_data; cmp_data; cmp_data = cmp_data->next) | |
3767 | cmp_data->char_offset = pos; | |
3768 | } | |
3769 | ||
54f78171 KH |
3770 | /* Setup raw-text or one of its subsidiaries in the structure |
3771 | coding_system CODING according to the already setup value eol_type | |
3772 | in CODING. CODING should be setup for some coding system in | |
3773 | advance. */ | |
3774 | ||
3775 | void | |
3776 | setup_raw_text_coding_system (coding) | |
3777 | struct coding_system *coding; | |
3778 | { | |
3779 | if (coding->type != coding_type_raw_text) | |
3780 | { | |
3781 | coding->symbol = Qraw_text; | |
3782 | coding->type = coding_type_raw_text; | |
3783 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
3784 | { | |
84d60297 RS |
3785 | Lisp_Object subsidiaries; |
3786 | subsidiaries = Fget (Qraw_text, Qeol_type); | |
54f78171 KH |
3787 | |
3788 | if (VECTORP (subsidiaries) | |
3789 | && XVECTOR (subsidiaries)->size == 3) | |
3790 | coding->symbol | |
3791 | = XVECTOR (subsidiaries)->contents[coding->eol_type]; | |
3792 | } | |
716e0b0a | 3793 | setup_coding_system (coding->symbol, coding); |
54f78171 KH |
3794 | } |
3795 | return; | |
3796 | } | |
3797 | ||
4ed46869 KH |
3798 | /* Emacs has a mechanism to automatically detect a coding system if it |
3799 | is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But, | |
3800 | it's impossible to distinguish some coding systems accurately | |
3801 | because they use the same range of codes. So, at first, coding | |
3802 | systems are categorized into 7, those are: | |
3803 | ||
0ef69138 | 3804 | o coding-category-emacs-mule |
4ed46869 KH |
3805 | |
3806 | The category for a coding system which has the same code range | |
3807 | as Emacs' internal format. Assigned the coding-system (Lisp | |
0ef69138 | 3808 | symbol) `emacs-mule' by default. |
4ed46869 KH |
3809 | |
3810 | o coding-category-sjis | |
3811 | ||
3812 | The category for a coding system which has the same code range | |
3813 | as SJIS. Assigned the coding-system (Lisp | |
7717c392 | 3814 | symbol) `japanese-shift-jis' by default. |
4ed46869 KH |
3815 | |
3816 | o coding-category-iso-7 | |
3817 | ||
3818 | The category for a coding system which has the same code range | |
7717c392 | 3819 | as ISO2022 of 7-bit environment. This doesn't use any locking |
d46c5b12 KH |
3820 | shift and single shift functions. This can encode/decode all |
3821 | charsets. Assigned the coding-system (Lisp symbol) | |
3822 | `iso-2022-7bit' by default. | |
3823 | ||
3824 | o coding-category-iso-7-tight | |
3825 | ||
3826 | Same as coding-category-iso-7 except that this can | |
3827 | encode/decode only the specified charsets. | |
4ed46869 KH |
3828 | |
3829 | o coding-category-iso-8-1 | |
3830 | ||
3831 | The category for a coding system which has the same code range | |
3832 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
3833 | for DIMENSION1 charset. This doesn't use any locking shift |
3834 | and single shift functions. Assigned the coding-system (Lisp | |
3835 | symbol) `iso-latin-1' by default. | |
4ed46869 KH |
3836 | |
3837 | o coding-category-iso-8-2 | |
3838 | ||
3839 | The category for a coding system which has the same code range | |
3840 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
3841 | for DIMENSION2 charset. This doesn't use any locking shift |
3842 | and single shift functions. Assigned the coding-system (Lisp | |
3843 | symbol) `japanese-iso-8bit' by default. | |
4ed46869 | 3844 | |
7717c392 | 3845 | o coding-category-iso-7-else |
4ed46869 KH |
3846 | |
3847 | The category for a coding system which has the same code range | |
8ca3766a | 3848 | as ISO2022 of 7-bit environment but uses locking shift or |
7717c392 KH |
3849 | single shift functions. Assigned the coding-system (Lisp |
3850 | symbol) `iso-2022-7bit-lock' by default. | |
3851 | ||
3852 | o coding-category-iso-8-else | |
3853 | ||
3854 | The category for a coding system which has the same code range | |
8ca3766a | 3855 | as ISO2022 of 8-bit environment but uses locking shift or |
7717c392 KH |
3856 | single shift functions. Assigned the coding-system (Lisp |
3857 | symbol) `iso-2022-8bit-ss2' by default. | |
4ed46869 KH |
3858 | |
3859 | o coding-category-big5 | |
3860 | ||
3861 | The category for a coding system which has the same code range | |
3862 | as BIG5. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 3863 | `cn-big5' by default. |
4ed46869 | 3864 | |
fa42c37f KH |
3865 | o coding-category-utf-8 |
3866 | ||
3867 | The category for a coding system which has the same code range | |
3868 | as UTF-8 (cf. RFC2279). Assigned the coding-system (Lisp | |
3869 | symbol) `utf-8' by default. | |
3870 | ||
3871 | o coding-category-utf-16-be | |
3872 | ||
3873 | The category for a coding system in which a text has an | |
3874 | Unicode signature (cf. Unicode Standard) in the order of BIG | |
3875 | endian at the head. Assigned the coding-system (Lisp symbol) | |
3876 | `utf-16-be' by default. | |
3877 | ||
3878 | o coding-category-utf-16-le | |
3879 | ||
3880 | The category for a coding system in which a text has an | |
3881 | Unicode signature (cf. Unicode Standard) in the order of | |
3882 | LITTLE endian at the head. Assigned the coding-system (Lisp | |
3883 | symbol) `utf-16-le' by default. | |
3884 | ||
1397dc18 KH |
3885 | o coding-category-ccl |
3886 | ||
3887 | The category for a coding system of which encoder/decoder is | |
3888 | written in CCL programs. The default value is nil, i.e., no | |
3889 | coding system is assigned. | |
3890 | ||
4ed46869 KH |
3891 | o coding-category-binary |
3892 | ||
3893 | The category for a coding system not categorized in any of the | |
3894 | above. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 3895 | `no-conversion' by default. |
4ed46869 KH |
3896 | |
3897 | Each of them is a Lisp symbol and the value is an actual | |
cfb43547 | 3898 | `coding-system' (this is also a Lisp symbol) assigned by a user. |
4ed46869 KH |
3899 | What Emacs does actually is to detect a category of coding system. |
3900 | Then, it uses a `coding-system' assigned to it. If Emacs can't | |
cfb43547 | 3901 | decide a single possible category, it selects a category of the |
4ed46869 KH |
3902 | highest priority. Priorities of categories are also specified by a |
3903 | user in a Lisp variable `coding-category-list'. | |
3904 | ||
3905 | */ | |
3906 | ||
66cfb530 KH |
3907 | static |
3908 | int ascii_skip_code[256]; | |
3909 | ||
d46c5b12 | 3910 | /* Detect how a text of length SRC_BYTES pointed by SOURCE is encoded. |
4ed46869 KH |
3911 | If it detects possible coding systems, return an integer in which |
3912 | appropriate flag bits are set. Flag bits are defined by macros | |
fa42c37f KH |
3913 | CODING_CATEGORY_MASK_XXX in `coding.h'. If PRIORITIES is non-NULL, |
3914 | it should point the table `coding_priorities'. In that case, only | |
3915 | the flag bit for a coding system of the highest priority is set in | |
0a28aafb KH |
3916 | the returned value. If MULTIBYTEP is nonzero, 8-bit codes of the |
3917 | range 0x80..0x9F are in multibyte form. | |
4ed46869 | 3918 | |
d46c5b12 KH |
3919 | How many ASCII characters are at the head is returned as *SKIP. */ |
3920 | ||
3921 | static int | |
0a28aafb | 3922 | detect_coding_mask (source, src_bytes, priorities, skip, multibytep) |
d46c5b12 KH |
3923 | unsigned char *source; |
3924 | int src_bytes, *priorities, *skip; | |
0a28aafb | 3925 | int multibytep; |
4ed46869 KH |
3926 | { |
3927 | register unsigned char c; | |
d46c5b12 | 3928 | unsigned char *src = source, *src_end = source + src_bytes; |
fa42c37f | 3929 | unsigned int mask, utf16_examined_p, iso2022_examined_p; |
da55a2b7 | 3930 | int i; |
4ed46869 KH |
3931 | |
3932 | /* At first, skip all ASCII characters and control characters except | |
3933 | for three ISO2022 specific control characters. */ | |
66cfb530 KH |
3934 | ascii_skip_code[ISO_CODE_SO] = 0; |
3935 | ascii_skip_code[ISO_CODE_SI] = 0; | |
3936 | ascii_skip_code[ISO_CODE_ESC] = 0; | |
3937 | ||
bcf26d6a | 3938 | label_loop_detect_coding: |
66cfb530 | 3939 | while (src < src_end && ascii_skip_code[*src]) src++; |
d46c5b12 | 3940 | *skip = src - source; |
4ed46869 KH |
3941 | |
3942 | if (src >= src_end) | |
3943 | /* We found nothing other than ASCII. There's nothing to do. */ | |
d46c5b12 | 3944 | return 0; |
4ed46869 | 3945 | |
8a8147d6 | 3946 | c = *src; |
4ed46869 KH |
3947 | /* The text seems to be encoded in some multilingual coding system. |
3948 | Now, try to find in which coding system the text is encoded. */ | |
3949 | if (c < 0x80) | |
bcf26d6a KH |
3950 | { |
3951 | /* i.e. (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) */ | |
3952 | /* C is an ISO2022 specific control code of C0. */ | |
0a28aafb | 3953 | mask = detect_coding_iso2022 (src, src_end, multibytep); |
1b2af4b0 | 3954 | if (mask == 0) |
d46c5b12 KH |
3955 | { |
3956 | /* No valid ISO2022 code follows C. Try again. */ | |
3957 | src++; | |
66cfb530 KH |
3958 | if (c == ISO_CODE_ESC) |
3959 | ascii_skip_code[ISO_CODE_ESC] = 1; | |
3960 | else | |
3961 | ascii_skip_code[ISO_CODE_SO] = ascii_skip_code[ISO_CODE_SI] = 1; | |
d46c5b12 KH |
3962 | goto label_loop_detect_coding; |
3963 | } | |
3964 | if (priorities) | |
fa42c37f KH |
3965 | { |
3966 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
3967 | { | |
3968 | if (mask & priorities[i]) | |
3969 | return priorities[i]; | |
3970 | } | |
3971 | return CODING_CATEGORY_MASK_RAW_TEXT; | |
3972 | } | |
bcf26d6a | 3973 | } |
d46c5b12 | 3974 | else |
c4825358 | 3975 | { |
d46c5b12 | 3976 | int try; |
4ed46869 | 3977 | |
0a28aafb | 3978 | if (multibytep && c == LEADING_CODE_8_BIT_CONTROL) |
67091e59 | 3979 | c = src[1] - 0x20; |
0a28aafb | 3980 | |
d46c5b12 KH |
3981 | if (c < 0xA0) |
3982 | { | |
3983 | /* C is the first byte of SJIS character code, | |
fa42c37f KH |
3984 | or a leading-code of Emacs' internal format (emacs-mule), |
3985 | or the first byte of UTF-16. */ | |
3986 | try = (CODING_CATEGORY_MASK_SJIS | |
3987 | | CODING_CATEGORY_MASK_EMACS_MULE | |
3988 | | CODING_CATEGORY_MASK_UTF_16_BE | |
3989 | | CODING_CATEGORY_MASK_UTF_16_LE); | |
d46c5b12 KH |
3990 | |
3991 | /* Or, if C is a special latin extra code, | |
93dec019 | 3992 | or is an ISO2022 specific control code of C1 (SS2 or SS3), |
d46c5b12 KH |
3993 | or is an ISO2022 control-sequence-introducer (CSI), |
3994 | we should also consider the possibility of ISO2022 codings. */ | |
3995 | if ((VECTORP (Vlatin_extra_code_table) | |
3996 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
3997 | || (c == ISO_CODE_SS2 || c == ISO_CODE_SS3) | |
3998 | || (c == ISO_CODE_CSI | |
3999 | && (src < src_end | |
4000 | && (*src == ']' | |
4001 | || ((*src == '0' || *src == '1' || *src == '2') | |
4002 | && src + 1 < src_end | |
4003 | && src[1] == ']'))))) | |
4004 | try |= (CODING_CATEGORY_MASK_ISO_8_ELSE | |
4005 | | CODING_CATEGORY_MASK_ISO_8BIT); | |
4006 | } | |
c4825358 | 4007 | else |
d46c5b12 KH |
4008 | /* C is a character of ISO2022 in graphic plane right, |
4009 | or a SJIS's 1-byte character code (i.e. JISX0201), | |
fa42c37f KH |
4010 | or the first byte of BIG5's 2-byte code, |
4011 | or the first byte of UTF-8/16. */ | |
d46c5b12 KH |
4012 | try = (CODING_CATEGORY_MASK_ISO_8_ELSE |
4013 | | CODING_CATEGORY_MASK_ISO_8BIT | |
4014 | | CODING_CATEGORY_MASK_SJIS | |
fa42c37f KH |
4015 | | CODING_CATEGORY_MASK_BIG5 |
4016 | | CODING_CATEGORY_MASK_UTF_8 | |
4017 | | CODING_CATEGORY_MASK_UTF_16_BE | |
4018 | | CODING_CATEGORY_MASK_UTF_16_LE); | |
d46c5b12 | 4019 | |
1397dc18 KH |
4020 | /* Or, we may have to consider the possibility of CCL. */ |
4021 | if (coding_system_table[CODING_CATEGORY_IDX_CCL] | |
4022 | && (coding_system_table[CODING_CATEGORY_IDX_CCL] | |
4023 | ->spec.ccl.valid_codes)[c]) | |
4024 | try |= CODING_CATEGORY_MASK_CCL; | |
4025 | ||
d46c5b12 | 4026 | mask = 0; |
fa42c37f | 4027 | utf16_examined_p = iso2022_examined_p = 0; |
d46c5b12 KH |
4028 | if (priorities) |
4029 | { | |
4030 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
4031 | { | |
fa42c37f KH |
4032 | if (!iso2022_examined_p |
4033 | && (priorities[i] & try & CODING_CATEGORY_MASK_ISO)) | |
4034 | { | |
0192762c | 4035 | mask |= detect_coding_iso2022 (src, src_end, multibytep); |
fa42c37f KH |
4036 | iso2022_examined_p = 1; |
4037 | } | |
5ab13dd0 | 4038 | else if (priorities[i] & try & CODING_CATEGORY_MASK_SJIS) |
0a28aafb | 4039 | mask |= detect_coding_sjis (src, src_end, multibytep); |
fa42c37f | 4040 | else if (priorities[i] & try & CODING_CATEGORY_MASK_UTF_8) |
0a28aafb | 4041 | mask |= detect_coding_utf_8 (src, src_end, multibytep); |
fa42c37f KH |
4042 | else if (!utf16_examined_p |
4043 | && (priorities[i] & try & | |
4044 | CODING_CATEGORY_MASK_UTF_16_BE_LE)) | |
4045 | { | |
0a28aafb | 4046 | mask |= detect_coding_utf_16 (src, src_end, multibytep); |
fa42c37f KH |
4047 | utf16_examined_p = 1; |
4048 | } | |
5ab13dd0 | 4049 | else if (priorities[i] & try & CODING_CATEGORY_MASK_BIG5) |
0a28aafb | 4050 | mask |= detect_coding_big5 (src, src_end, multibytep); |
5ab13dd0 | 4051 | else if (priorities[i] & try & CODING_CATEGORY_MASK_EMACS_MULE) |
0a28aafb | 4052 | mask |= detect_coding_emacs_mule (src, src_end, multibytep); |
89fa8b36 | 4053 | else if (priorities[i] & try & CODING_CATEGORY_MASK_CCL) |
0a28aafb | 4054 | mask |= detect_coding_ccl (src, src_end, multibytep); |
5ab13dd0 | 4055 | else if (priorities[i] & CODING_CATEGORY_MASK_RAW_TEXT) |
fa42c37f | 4056 | mask |= CODING_CATEGORY_MASK_RAW_TEXT; |
5ab13dd0 | 4057 | else if (priorities[i] & CODING_CATEGORY_MASK_BINARY) |
fa42c37f KH |
4058 | mask |= CODING_CATEGORY_MASK_BINARY; |
4059 | if (mask & priorities[i]) | |
4060 | return priorities[i]; | |
d46c5b12 KH |
4061 | } |
4062 | return CODING_CATEGORY_MASK_RAW_TEXT; | |
4063 | } | |
4064 | if (try & CODING_CATEGORY_MASK_ISO) | |
0a28aafb | 4065 | mask |= detect_coding_iso2022 (src, src_end, multibytep); |
d46c5b12 | 4066 | if (try & CODING_CATEGORY_MASK_SJIS) |
0a28aafb | 4067 | mask |= detect_coding_sjis (src, src_end, multibytep); |
d46c5b12 | 4068 | if (try & CODING_CATEGORY_MASK_BIG5) |
0a28aafb | 4069 | mask |= detect_coding_big5 (src, src_end, multibytep); |
fa42c37f | 4070 | if (try & CODING_CATEGORY_MASK_UTF_8) |
0a28aafb | 4071 | mask |= detect_coding_utf_8 (src, src_end, multibytep); |
fa42c37f | 4072 | if (try & CODING_CATEGORY_MASK_UTF_16_BE_LE) |
0a28aafb | 4073 | mask |= detect_coding_utf_16 (src, src_end, multibytep); |
d46c5b12 | 4074 | if (try & CODING_CATEGORY_MASK_EMACS_MULE) |
0a28aafb | 4075 | mask |= detect_coding_emacs_mule (src, src_end, multibytep); |
1397dc18 | 4076 | if (try & CODING_CATEGORY_MASK_CCL) |
0a28aafb | 4077 | mask |= detect_coding_ccl (src, src_end, multibytep); |
c4825358 | 4078 | } |
5ab13dd0 | 4079 | return (mask | CODING_CATEGORY_MASK_RAW_TEXT | CODING_CATEGORY_MASK_BINARY); |
4ed46869 KH |
4080 | } |
4081 | ||
4082 | /* Detect how a text of length SRC_BYTES pointed by SRC is encoded. | |
4083 | The information of the detected coding system is set in CODING. */ | |
4084 | ||
4085 | void | |
4086 | detect_coding (coding, src, src_bytes) | |
4087 | struct coding_system *coding; | |
a4244313 | 4088 | const unsigned char *src; |
4ed46869 KH |
4089 | int src_bytes; |
4090 | { | |
d46c5b12 | 4091 | unsigned int idx; |
da55a2b7 | 4092 | int skip, mask; |
84d60297 | 4093 | Lisp_Object val; |
4ed46869 | 4094 | |
84d60297 | 4095 | val = Vcoding_category_list; |
64c1e55f KH |
4096 | mask = detect_coding_mask (src, src_bytes, coding_priorities, &skip, |
4097 | coding->src_multibyte); | |
d46c5b12 | 4098 | coding->heading_ascii = skip; |
4ed46869 | 4099 | |
d46c5b12 KH |
4100 | if (!mask) return; |
4101 | ||
4102 | /* We found a single coding system of the highest priority in MASK. */ | |
4103 | idx = 0; | |
4104 | while (mask && ! (mask & 1)) mask >>= 1, idx++; | |
4105 | if (! mask) | |
4106 | idx = CODING_CATEGORY_IDX_RAW_TEXT; | |
4ed46869 | 4107 | |
f5c1dd0d | 4108 | val = SYMBOL_VALUE (XVECTOR (Vcoding_category_table)->contents[idx]); |
d46c5b12 KH |
4109 | |
4110 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
27901516 | 4111 | { |
84d60297 | 4112 | Lisp_Object tmp; |
d46c5b12 | 4113 | |
84d60297 | 4114 | tmp = Fget (val, Qeol_type); |
d46c5b12 KH |
4115 | if (VECTORP (tmp)) |
4116 | val = XVECTOR (tmp)->contents[coding->eol_type]; | |
4ed46869 | 4117 | } |
b73bfc1c KH |
4118 | |
4119 | /* Setup this new coding system while preserving some slots. */ | |
4120 | { | |
4121 | int src_multibyte = coding->src_multibyte; | |
4122 | int dst_multibyte = coding->dst_multibyte; | |
4123 | ||
4124 | setup_coding_system (val, coding); | |
4125 | coding->src_multibyte = src_multibyte; | |
4126 | coding->dst_multibyte = dst_multibyte; | |
4127 | coding->heading_ascii = skip; | |
4128 | } | |
4ed46869 KH |
4129 | } |
4130 | ||
d46c5b12 KH |
4131 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by |
4132 | SOURCE is encoded. Return one of CODING_EOL_LF, CODING_EOL_CRLF, | |
4133 | CODING_EOL_CR, and CODING_EOL_UNDECIDED. | |
4134 | ||
4135 | How many non-eol characters are at the head is returned as *SKIP. */ | |
4ed46869 | 4136 | |
bc4bc72a RS |
4137 | #define MAX_EOL_CHECK_COUNT 3 |
4138 | ||
d46c5b12 KH |
4139 | static int |
4140 | detect_eol_type (source, src_bytes, skip) | |
4141 | unsigned char *source; | |
4142 | int src_bytes, *skip; | |
4ed46869 | 4143 | { |
d46c5b12 | 4144 | unsigned char *src = source, *src_end = src + src_bytes; |
4ed46869 | 4145 | unsigned char c; |
bc4bc72a RS |
4146 | int total = 0; /* How many end-of-lines are found so far. */ |
4147 | int eol_type = CODING_EOL_UNDECIDED; | |
4148 | int this_eol_type; | |
4ed46869 | 4149 | |
d46c5b12 KH |
4150 | *skip = 0; |
4151 | ||
bc4bc72a | 4152 | while (src < src_end && total < MAX_EOL_CHECK_COUNT) |
4ed46869 KH |
4153 | { |
4154 | c = *src++; | |
bc4bc72a | 4155 | if (c == '\n' || c == '\r') |
4ed46869 | 4156 | { |
d46c5b12 KH |
4157 | if (*skip == 0) |
4158 | *skip = src - 1 - source; | |
bc4bc72a RS |
4159 | total++; |
4160 | if (c == '\n') | |
4161 | this_eol_type = CODING_EOL_LF; | |
4162 | else if (src >= src_end || *src != '\n') | |
4163 | this_eol_type = CODING_EOL_CR; | |
4ed46869 | 4164 | else |
bc4bc72a RS |
4165 | this_eol_type = CODING_EOL_CRLF, src++; |
4166 | ||
4167 | if (eol_type == CODING_EOL_UNDECIDED) | |
4168 | /* This is the first end-of-line. */ | |
4169 | eol_type = this_eol_type; | |
4170 | else if (eol_type != this_eol_type) | |
d46c5b12 KH |
4171 | { |
4172 | /* The found type is different from what found before. */ | |
4173 | eol_type = CODING_EOL_INCONSISTENT; | |
4174 | break; | |
4175 | } | |
4ed46869 KH |
4176 | } |
4177 | } | |
bc4bc72a | 4178 | |
d46c5b12 KH |
4179 | if (*skip == 0) |
4180 | *skip = src_end - source; | |
85a02ca4 | 4181 | return eol_type; |
4ed46869 KH |
4182 | } |
4183 | ||
fa42c37f KH |
4184 | /* Like detect_eol_type, but detect EOL type in 2-octet |
4185 | big-endian/little-endian format for coding systems utf-16-be and | |
4186 | utf-16-le. */ | |
4187 | ||
4188 | static int | |
4189 | detect_eol_type_in_2_octet_form (source, src_bytes, skip, big_endian_p) | |
4190 | unsigned char *source; | |
cfb43547 | 4191 | int src_bytes, *skip, big_endian_p; |
fa42c37f KH |
4192 | { |
4193 | unsigned char *src = source, *src_end = src + src_bytes; | |
4194 | unsigned int c1, c2; | |
4195 | int total = 0; /* How many end-of-lines are found so far. */ | |
4196 | int eol_type = CODING_EOL_UNDECIDED; | |
4197 | int this_eol_type; | |
4198 | int msb, lsb; | |
4199 | ||
4200 | if (big_endian_p) | |
4201 | msb = 0, lsb = 1; | |
4202 | else | |
4203 | msb = 1, lsb = 0; | |
4204 | ||
4205 | *skip = 0; | |
4206 | ||
4207 | while ((src + 1) < src_end && total < MAX_EOL_CHECK_COUNT) | |
4208 | { | |
4209 | c1 = (src[msb] << 8) | (src[lsb]); | |
4210 | src += 2; | |
4211 | ||
4212 | if (c1 == '\n' || c1 == '\r') | |
4213 | { | |
4214 | if (*skip == 0) | |
4215 | *skip = src - 2 - source; | |
4216 | total++; | |
4217 | if (c1 == '\n') | |
4218 | { | |
4219 | this_eol_type = CODING_EOL_LF; | |
4220 | } | |
4221 | else | |
4222 | { | |
4223 | if ((src + 1) >= src_end) | |
4224 | { | |
4225 | this_eol_type = CODING_EOL_CR; | |
4226 | } | |
4227 | else | |
4228 | { | |
4229 | c2 = (src[msb] << 8) | (src[lsb]); | |
4230 | if (c2 == '\n') | |
4231 | this_eol_type = CODING_EOL_CRLF, src += 2; | |
4232 | else | |
4233 | this_eol_type = CODING_EOL_CR; | |
4234 | } | |
4235 | } | |
4236 | ||
4237 | if (eol_type == CODING_EOL_UNDECIDED) | |
4238 | /* This is the first end-of-line. */ | |
4239 | eol_type = this_eol_type; | |
4240 | else if (eol_type != this_eol_type) | |
4241 | { | |
4242 | /* The found type is different from what found before. */ | |
4243 | eol_type = CODING_EOL_INCONSISTENT; | |
4244 | break; | |
4245 | } | |
4246 | } | |
4247 | } | |
4248 | ||
4249 | if (*skip == 0) | |
4250 | *skip = src_end - source; | |
4251 | return eol_type; | |
4252 | } | |
4253 | ||
4ed46869 KH |
4254 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by SRC |
4255 | is encoded. If it detects an appropriate format of end-of-line, it | |
4256 | sets the information in *CODING. */ | |
4257 | ||
4258 | void | |
4259 | detect_eol (coding, src, src_bytes) | |
4260 | struct coding_system *coding; | |
a4244313 | 4261 | const unsigned char *src; |
4ed46869 KH |
4262 | int src_bytes; |
4263 | { | |
4608c386 | 4264 | Lisp_Object val; |
d46c5b12 | 4265 | int skip; |
fa42c37f KH |
4266 | int eol_type; |
4267 | ||
4268 | switch (coding->category_idx) | |
4269 | { | |
4270 | case CODING_CATEGORY_IDX_UTF_16_BE: | |
4271 | eol_type = detect_eol_type_in_2_octet_form (src, src_bytes, &skip, 1); | |
4272 | break; | |
4273 | case CODING_CATEGORY_IDX_UTF_16_LE: | |
4274 | eol_type = detect_eol_type_in_2_octet_form (src, src_bytes, &skip, 0); | |
4275 | break; | |
4276 | default: | |
4277 | eol_type = detect_eol_type (src, src_bytes, &skip); | |
4278 | break; | |
4279 | } | |
d46c5b12 KH |
4280 | |
4281 | if (coding->heading_ascii > skip) | |
4282 | coding->heading_ascii = skip; | |
4283 | else | |
4284 | skip = coding->heading_ascii; | |
4ed46869 | 4285 | |
0ef69138 | 4286 | if (eol_type == CODING_EOL_UNDECIDED) |
4ed46869 | 4287 | return; |
27901516 KH |
4288 | if (eol_type == CODING_EOL_INCONSISTENT) |
4289 | { | |
4290 | #if 0 | |
4291 | /* This code is suppressed until we find a better way to | |
992f23f2 | 4292 | distinguish raw text file and binary file. */ |
27901516 KH |
4293 | |
4294 | /* If we have already detected that the coding is raw-text, the | |
4295 | coding should actually be no-conversion. */ | |
4296 | if (coding->type == coding_type_raw_text) | |
4297 | { | |
4298 | setup_coding_system (Qno_conversion, coding); | |
4299 | return; | |
4300 | } | |
4301 | /* Else, let's decode only text code anyway. */ | |
4302 | #endif /* 0 */ | |
1b2af4b0 | 4303 | eol_type = CODING_EOL_LF; |
27901516 KH |
4304 | } |
4305 | ||
4608c386 | 4306 | val = Fget (coding->symbol, Qeol_type); |
4ed46869 | 4307 | if (VECTORP (val) && XVECTOR (val)->size == 3) |
d46c5b12 | 4308 | { |
b73bfc1c KH |
4309 | int src_multibyte = coding->src_multibyte; |
4310 | int dst_multibyte = coding->dst_multibyte; | |
1cd6b64c | 4311 | struct composition_data *cmp_data = coding->cmp_data; |
b73bfc1c | 4312 | |
d46c5b12 | 4313 | setup_coding_system (XVECTOR (val)->contents[eol_type], coding); |
b73bfc1c KH |
4314 | coding->src_multibyte = src_multibyte; |
4315 | coding->dst_multibyte = dst_multibyte; | |
d46c5b12 | 4316 | coding->heading_ascii = skip; |
1cd6b64c | 4317 | coding->cmp_data = cmp_data; |
d46c5b12 KH |
4318 | } |
4319 | } | |
4320 | ||
4321 | #define CONVERSION_BUFFER_EXTRA_ROOM 256 | |
4322 | ||
b73bfc1c KH |
4323 | #define DECODING_BUFFER_MAG(coding) \ |
4324 | (coding->type == coding_type_iso2022 \ | |
4325 | ? 3 \ | |
4326 | : (coding->type == coding_type_ccl \ | |
4327 | ? coding->spec.ccl.decoder.buf_magnification \ | |
4328 | : 2)) | |
d46c5b12 KH |
4329 | |
4330 | /* Return maximum size (bytes) of a buffer enough for decoding | |
4331 | SRC_BYTES of text encoded in CODING. */ | |
4332 | ||
4333 | int | |
4334 | decoding_buffer_size (coding, src_bytes) | |
4335 | struct coding_system *coding; | |
4336 | int src_bytes; | |
4337 | { | |
4338 | return (src_bytes * DECODING_BUFFER_MAG (coding) | |
4339 | + CONVERSION_BUFFER_EXTRA_ROOM); | |
4340 | } | |
4341 | ||
4342 | /* Return maximum size (bytes) of a buffer enough for encoding | |
4343 | SRC_BYTES of text to CODING. */ | |
4344 | ||
4345 | int | |
4346 | encoding_buffer_size (coding, src_bytes) | |
4347 | struct coding_system *coding; | |
4348 | int src_bytes; | |
4349 | { | |
4350 | int magnification; | |
4351 | ||
4352 | if (coding->type == coding_type_ccl) | |
4353 | magnification = coding->spec.ccl.encoder.buf_magnification; | |
b73bfc1c | 4354 | else if (CODING_REQUIRE_ENCODING (coding)) |
d46c5b12 | 4355 | magnification = 3; |
b73bfc1c KH |
4356 | else |
4357 | magnification = 1; | |
d46c5b12 KH |
4358 | |
4359 | return (src_bytes * magnification + CONVERSION_BUFFER_EXTRA_ROOM); | |
4360 | } | |
4361 | ||
73be902c KH |
4362 | /* Working buffer for code conversion. */ |
4363 | struct conversion_buffer | |
4364 | { | |
4365 | int size; /* size of data. */ | |
4366 | int on_stack; /* 1 if allocated by alloca. */ | |
4367 | unsigned char *data; | |
4368 | }; | |
d46c5b12 | 4369 | |
73be902c KH |
4370 | /* Don't use alloca for allocating memory space larger than this, lest |
4371 | we overflow their stack. */ | |
4372 | #define MAX_ALLOCA 16*1024 | |
d46c5b12 | 4373 | |
73be902c KH |
4374 | /* Allocate LEN bytes of memory for BUF (struct conversion_buffer). */ |
4375 | #define allocate_conversion_buffer(buf, len) \ | |
4376 | do { \ | |
4377 | if (len < MAX_ALLOCA) \ | |
4378 | { \ | |
4379 | buf.data = (unsigned char *) alloca (len); \ | |
4380 | buf.on_stack = 1; \ | |
4381 | } \ | |
4382 | else \ | |
4383 | { \ | |
4384 | buf.data = (unsigned char *) xmalloc (len); \ | |
4385 | buf.on_stack = 0; \ | |
4386 | } \ | |
4387 | buf.size = len; \ | |
4388 | } while (0) | |
d46c5b12 | 4389 | |
73be902c KH |
4390 | /* Double the allocated memory for *BUF. */ |
4391 | static void | |
4392 | extend_conversion_buffer (buf) | |
4393 | struct conversion_buffer *buf; | |
d46c5b12 | 4394 | { |
73be902c | 4395 | if (buf->on_stack) |
d46c5b12 | 4396 | { |
73be902c KH |
4397 | unsigned char *save = buf->data; |
4398 | buf->data = (unsigned char *) xmalloc (buf->size * 2); | |
4399 | bcopy (save, buf->data, buf->size); | |
4400 | buf->on_stack = 0; | |
d46c5b12 | 4401 | } |
73be902c KH |
4402 | else |
4403 | { | |
4404 | buf->data = (unsigned char *) xrealloc (buf->data, buf->size * 2); | |
4405 | } | |
4406 | buf->size *= 2; | |
4407 | } | |
4408 | ||
4409 | /* Free the allocated memory for BUF if it is not on stack. */ | |
4410 | static void | |
4411 | free_conversion_buffer (buf) | |
4412 | struct conversion_buffer *buf; | |
4413 | { | |
4414 | if (!buf->on_stack) | |
4415 | xfree (buf->data); | |
d46c5b12 KH |
4416 | } |
4417 | ||
4418 | int | |
4419 | ccl_coding_driver (coding, source, destination, src_bytes, dst_bytes, encodep) | |
4420 | struct coding_system *coding; | |
4421 | unsigned char *source, *destination; | |
4422 | int src_bytes, dst_bytes, encodep; | |
4423 | { | |
4424 | struct ccl_program *ccl | |
4425 | = encodep ? &coding->spec.ccl.encoder : &coding->spec.ccl.decoder; | |
1c3478b0 | 4426 | unsigned char *dst = destination; |
d46c5b12 | 4427 | |
bd64290d | 4428 | ccl->suppress_error = coding->suppress_error; |
ae9ff118 | 4429 | ccl->last_block = coding->mode & CODING_MODE_LAST_BLOCK; |
aaaf0b1e | 4430 | if (encodep) |
80e0ca99 KH |
4431 | { |
4432 | /* On encoding, EOL format is converted within ccl_driver. For | |
4433 | that, setup proper information in the structure CCL. */ | |
4434 | ccl->eol_type = coding->eol_type; | |
4435 | if (ccl->eol_type ==CODING_EOL_UNDECIDED) | |
4436 | ccl->eol_type = CODING_EOL_LF; | |
4437 | ccl->cr_consumed = coding->spec.ccl.cr_carryover; | |
4438 | } | |
7272d75c | 4439 | ccl->multibyte = coding->src_multibyte; |
1c3478b0 KH |
4440 | if (coding->spec.ccl.eight_bit_carryover[0] != 0) |
4441 | { | |
4442 | /* Move carryover bytes to DESTINATION. */ | |
4443 | unsigned char *p = coding->spec.ccl.eight_bit_carryover; | |
4444 | while (*p) | |
4445 | *dst++ = *p++; | |
4446 | coding->spec.ccl.eight_bit_carryover[0] = 0; | |
4447 | if (dst_bytes) | |
4448 | dst_bytes -= dst - destination; | |
4449 | } | |
4450 | ||
4451 | coding->produced = (ccl_driver (ccl, source, dst, src_bytes, dst_bytes, | |
4452 | &(coding->consumed)) | |
4453 | + dst - destination); | |
4454 | ||
b73bfc1c | 4455 | if (encodep) |
80e0ca99 KH |
4456 | { |
4457 | coding->produced_char = coding->produced; | |
4458 | coding->spec.ccl.cr_carryover = ccl->cr_consumed; | |
4459 | } | |
ade8d05e KH |
4460 | else if (!ccl->eight_bit_control) |
4461 | { | |
4462 | /* The produced bytes forms a valid multibyte sequence. */ | |
4463 | coding->produced_char | |
4464 | = multibyte_chars_in_text (destination, coding->produced); | |
4465 | coding->spec.ccl.eight_bit_carryover[0] = 0; | |
4466 | } | |
b73bfc1c KH |
4467 | else |
4468 | { | |
1c3478b0 KH |
4469 | /* On decoding, the destination should always multibyte. But, |
4470 | CCL program might have been generated an invalid multibyte | |
4471 | sequence. Here we make such a sequence valid as | |
4472 | multibyte. */ | |
b73bfc1c KH |
4473 | int bytes |
4474 | = dst_bytes ? dst_bytes : source + coding->consumed - destination; | |
1c3478b0 KH |
4475 | |
4476 | if ((coding->consumed < src_bytes | |
4477 | || !ccl->last_block) | |
4478 | && coding->produced >= 1 | |
4479 | && destination[coding->produced - 1] >= 0x80) | |
4480 | { | |
4481 | /* We should not convert the tailing 8-bit codes to | |
4482 | multibyte form even if they doesn't form a valid | |
4483 | multibyte sequence. They may form a valid sequence in | |
4484 | the next call. */ | |
4485 | int carryover = 0; | |
4486 | ||
4487 | if (destination[coding->produced - 1] < 0xA0) | |
4488 | carryover = 1; | |
4489 | else if (coding->produced >= 2) | |
4490 | { | |
4491 | if (destination[coding->produced - 2] >= 0x80) | |
4492 | { | |
4493 | if (destination[coding->produced - 2] < 0xA0) | |
4494 | carryover = 2; | |
4495 | else if (coding->produced >= 3 | |
4496 | && destination[coding->produced - 3] >= 0x80 | |
4497 | && destination[coding->produced - 3] < 0xA0) | |
4498 | carryover = 3; | |
4499 | } | |
4500 | } | |
4501 | if (carryover > 0) | |
4502 | { | |
4503 | BCOPY_SHORT (destination + coding->produced - carryover, | |
4504 | coding->spec.ccl.eight_bit_carryover, | |
4505 | carryover); | |
4506 | coding->spec.ccl.eight_bit_carryover[carryover] = 0; | |
4507 | coding->produced -= carryover; | |
4508 | } | |
4509 | } | |
b73bfc1c KH |
4510 | coding->produced = str_as_multibyte (destination, bytes, |
4511 | coding->produced, | |
4512 | &(coding->produced_char)); | |
4513 | } | |
69f76525 | 4514 | |
d46c5b12 KH |
4515 | switch (ccl->status) |
4516 | { | |
4517 | case CCL_STAT_SUSPEND_BY_SRC: | |
73be902c | 4518 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; |
d46c5b12 KH |
4519 | break; |
4520 | case CCL_STAT_SUSPEND_BY_DST: | |
73be902c | 4521 | coding->result = CODING_FINISH_INSUFFICIENT_DST; |
d46c5b12 | 4522 | break; |
9864ebce KH |
4523 | case CCL_STAT_QUIT: |
4524 | case CCL_STAT_INVALID_CMD: | |
73be902c | 4525 | coding->result = CODING_FINISH_INTERRUPT; |
9864ebce | 4526 | break; |
d46c5b12 | 4527 | default: |
73be902c | 4528 | coding->result = CODING_FINISH_NORMAL; |
d46c5b12 KH |
4529 | break; |
4530 | } | |
73be902c | 4531 | return coding->result; |
4ed46869 KH |
4532 | } |
4533 | ||
aaaf0b1e KH |
4534 | /* Decode EOL format of the text at PTR of BYTES length destructively |
4535 | according to CODING->eol_type. This is called after the CCL | |
4536 | program produced a decoded text at PTR. If we do CRLF->LF | |
4537 | conversion, update CODING->produced and CODING->produced_char. */ | |
4538 | ||
4539 | static void | |
4540 | decode_eol_post_ccl (coding, ptr, bytes) | |
4541 | struct coding_system *coding; | |
4542 | unsigned char *ptr; | |
4543 | int bytes; | |
4544 | { | |
4545 | Lisp_Object val, saved_coding_symbol; | |
4546 | unsigned char *pend = ptr + bytes; | |
4547 | int dummy; | |
4548 | ||
4549 | /* Remember the current coding system symbol. We set it back when | |
4550 | an inconsistent EOL is found so that `last-coding-system-used' is | |
4551 | set to the coding system that doesn't specify EOL conversion. */ | |
4552 | saved_coding_symbol = coding->symbol; | |
4553 | ||
4554 | coding->spec.ccl.cr_carryover = 0; | |
4555 | if (coding->eol_type == CODING_EOL_UNDECIDED) | |
4556 | { | |
4557 | /* Here, to avoid the call of setup_coding_system, we directly | |
4558 | call detect_eol_type. */ | |
4559 | coding->eol_type = detect_eol_type (ptr, bytes, &dummy); | |
74b01b80 EZ |
4560 | if (coding->eol_type == CODING_EOL_INCONSISTENT) |
4561 | coding->eol_type = CODING_EOL_LF; | |
4562 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
4563 | { | |
4564 | val = Fget (coding->symbol, Qeol_type); | |
4565 | if (VECTORP (val) && XVECTOR (val)->size == 3) | |
4566 | coding->symbol = XVECTOR (val)->contents[coding->eol_type]; | |
4567 | } | |
aaaf0b1e KH |
4568 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
4569 | } | |
4570 | ||
74b01b80 EZ |
4571 | if (coding->eol_type == CODING_EOL_LF |
4572 | || coding->eol_type == CODING_EOL_UNDECIDED) | |
aaaf0b1e KH |
4573 | { |
4574 | /* We have nothing to do. */ | |
4575 | ptr = pend; | |
4576 | } | |
4577 | else if (coding->eol_type == CODING_EOL_CRLF) | |
4578 | { | |
4579 | unsigned char *pstart = ptr, *p = ptr; | |
4580 | ||
4581 | if (! (coding->mode & CODING_MODE_LAST_BLOCK) | |
4582 | && *(pend - 1) == '\r') | |
4583 | { | |
4584 | /* If the last character is CR, we can't handle it here | |
4585 | because LF will be in the not-yet-decoded source text. | |
9861e777 | 4586 | Record that the CR is not yet processed. */ |
aaaf0b1e KH |
4587 | coding->spec.ccl.cr_carryover = 1; |
4588 | coding->produced--; | |
4589 | coding->produced_char--; | |
4590 | pend--; | |
4591 | } | |
4592 | while (ptr < pend) | |
4593 | { | |
4594 | if (*ptr == '\r') | |
4595 | { | |
4596 | if (ptr + 1 < pend && *(ptr + 1) == '\n') | |
4597 | { | |
4598 | *p++ = '\n'; | |
4599 | ptr += 2; | |
4600 | } | |
4601 | else | |
4602 | { | |
4603 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4604 | goto undo_eol_conversion; | |
4605 | *p++ = *ptr++; | |
4606 | } | |
4607 | } | |
4608 | else if (*ptr == '\n' | |
4609 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4610 | goto undo_eol_conversion; | |
4611 | else | |
4612 | *p++ = *ptr++; | |
4613 | continue; | |
4614 | ||
4615 | undo_eol_conversion: | |
4616 | /* We have faced with inconsistent EOL format at PTR. | |
4617 | Convert all LFs before PTR back to CRLFs. */ | |
4618 | for (p--, ptr--; p >= pstart; p--) | |
4619 | { | |
4620 | if (*p == '\n') | |
4621 | *ptr-- = '\n', *ptr-- = '\r'; | |
4622 | else | |
4623 | *ptr-- = *p; | |
4624 | } | |
4625 | /* If carryover is recorded, cancel it because we don't | |
4626 | convert CRLF anymore. */ | |
4627 | if (coding->spec.ccl.cr_carryover) | |
4628 | { | |
4629 | coding->spec.ccl.cr_carryover = 0; | |
4630 | coding->produced++; | |
4631 | coding->produced_char++; | |
4632 | pend++; | |
4633 | } | |
4634 | p = ptr = pend; | |
4635 | coding->eol_type = CODING_EOL_LF; | |
4636 | coding->symbol = saved_coding_symbol; | |
4637 | } | |
4638 | if (p < pend) | |
4639 | { | |
4640 | /* As each two-byte sequence CRLF was converted to LF, (PEND | |
4641 | - P) is the number of deleted characters. */ | |
4642 | coding->produced -= pend - p; | |
4643 | coding->produced_char -= pend - p; | |
4644 | } | |
4645 | } | |
4646 | else /* i.e. coding->eol_type == CODING_EOL_CR */ | |
4647 | { | |
4648 | unsigned char *p = ptr; | |
4649 | ||
4650 | for (; ptr < pend; ptr++) | |
4651 | { | |
4652 | if (*ptr == '\r') | |
4653 | *ptr = '\n'; | |
4654 | else if (*ptr == '\n' | |
4655 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4656 | { | |
4657 | for (; p < ptr; p++) | |
4658 | { | |
4659 | if (*p == '\n') | |
4660 | *p = '\r'; | |
4661 | } | |
4662 | ptr = pend; | |
4663 | coding->eol_type = CODING_EOL_LF; | |
4664 | coding->symbol = saved_coding_symbol; | |
4665 | } | |
4666 | } | |
4667 | } | |
4668 | } | |
4669 | ||
4ed46869 KH |
4670 | /* See "GENERAL NOTES about `decode_coding_XXX ()' functions". Before |
4671 | decoding, it may detect coding system and format of end-of-line if | |
b73bfc1c KH |
4672 | those are not yet decided. The source should be unibyte, the |
4673 | result is multibyte if CODING->dst_multibyte is nonzero, else | |
4674 | unibyte. */ | |
4ed46869 KH |
4675 | |
4676 | int | |
d46c5b12 | 4677 | decode_coding (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 4678 | struct coding_system *coding; |
a4244313 KR |
4679 | const unsigned char *source; |
4680 | unsigned char *destination; | |
4ed46869 | 4681 | int src_bytes, dst_bytes; |
4ed46869 | 4682 | { |
9861e777 EZ |
4683 | int extra = 0; |
4684 | ||
0ef69138 | 4685 | if (coding->type == coding_type_undecided) |
4ed46869 KH |
4686 | detect_coding (coding, source, src_bytes); |
4687 | ||
aaaf0b1e KH |
4688 | if (coding->eol_type == CODING_EOL_UNDECIDED |
4689 | && coding->type != coding_type_ccl) | |
8844fa83 KH |
4690 | { |
4691 | detect_eol (coding, source, src_bytes); | |
4692 | /* We had better recover the original eol format if we | |
8ca3766a | 4693 | encounter an inconsistent eol format while decoding. */ |
8844fa83 KH |
4694 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
4695 | } | |
4ed46869 | 4696 | |
b73bfc1c KH |
4697 | coding->produced = coding->produced_char = 0; |
4698 | coding->consumed = coding->consumed_char = 0; | |
4699 | coding->errors = 0; | |
4700 | coding->result = CODING_FINISH_NORMAL; | |
4701 | ||
4ed46869 KH |
4702 | switch (coding->type) |
4703 | { | |
4ed46869 | 4704 | case coding_type_sjis: |
b73bfc1c KH |
4705 | decode_coding_sjis_big5 (coding, source, destination, |
4706 | src_bytes, dst_bytes, 1); | |
4ed46869 KH |
4707 | break; |
4708 | ||
4709 | case coding_type_iso2022: | |
b73bfc1c KH |
4710 | decode_coding_iso2022 (coding, source, destination, |
4711 | src_bytes, dst_bytes); | |
4ed46869 KH |
4712 | break; |
4713 | ||
4714 | case coding_type_big5: | |
b73bfc1c KH |
4715 | decode_coding_sjis_big5 (coding, source, destination, |
4716 | src_bytes, dst_bytes, 0); | |
4717 | break; | |
4718 | ||
4719 | case coding_type_emacs_mule: | |
4720 | decode_coding_emacs_mule (coding, source, destination, | |
4721 | src_bytes, dst_bytes); | |
4ed46869 KH |
4722 | break; |
4723 | ||
4724 | case coding_type_ccl: | |
aaaf0b1e KH |
4725 | if (coding->spec.ccl.cr_carryover) |
4726 | { | |
9861e777 EZ |
4727 | /* Put the CR which was not processed by the previous call |
4728 | of decode_eol_post_ccl in DESTINATION. It will be | |
4729 | decoded together with the following LF by the call to | |
4730 | decode_eol_post_ccl below. */ | |
aaaf0b1e KH |
4731 | *destination = '\r'; |
4732 | coding->produced++; | |
4733 | coding->produced_char++; | |
4734 | dst_bytes--; | |
9861e777 | 4735 | extra = coding->spec.ccl.cr_carryover; |
aaaf0b1e | 4736 | } |
9861e777 | 4737 | ccl_coding_driver (coding, source, destination + extra, |
b73bfc1c | 4738 | src_bytes, dst_bytes, 0); |
aaaf0b1e | 4739 | if (coding->eol_type != CODING_EOL_LF) |
9861e777 EZ |
4740 | { |
4741 | coding->produced += extra; | |
4742 | coding->produced_char += extra; | |
4743 | decode_eol_post_ccl (coding, destination, coding->produced); | |
4744 | } | |
d46c5b12 KH |
4745 | break; |
4746 | ||
b73bfc1c KH |
4747 | default: |
4748 | decode_eol (coding, source, destination, src_bytes, dst_bytes); | |
4749 | } | |
4750 | ||
4751 | if (coding->result == CODING_FINISH_INSUFFICIENT_SRC | |
e7c9eef9 | 4752 | && coding->mode & CODING_MODE_LAST_BLOCK |
b73bfc1c KH |
4753 | && coding->consumed == src_bytes) |
4754 | coding->result = CODING_FINISH_NORMAL; | |
4755 | ||
4756 | if (coding->mode & CODING_MODE_LAST_BLOCK | |
4757 | && coding->result == CODING_FINISH_INSUFFICIENT_SRC) | |
4758 | { | |
a4244313 | 4759 | const unsigned char *src = source + coding->consumed; |
b73bfc1c KH |
4760 | unsigned char *dst = destination + coding->produced; |
4761 | ||
4762 | src_bytes -= coding->consumed; | |
bb10be8b | 4763 | coding->errors++; |
b73bfc1c KH |
4764 | if (COMPOSING_P (coding)) |
4765 | DECODE_COMPOSITION_END ('1'); | |
4766 | while (src_bytes--) | |
d46c5b12 | 4767 | { |
b73bfc1c KH |
4768 | int c = *src++; |
4769 | dst += CHAR_STRING (c, dst); | |
4770 | coding->produced_char++; | |
d46c5b12 | 4771 | } |
b73bfc1c KH |
4772 | coding->consumed = coding->consumed_char = src - source; |
4773 | coding->produced = dst - destination; | |
73be902c | 4774 | coding->result = CODING_FINISH_NORMAL; |
4ed46869 KH |
4775 | } |
4776 | ||
b73bfc1c KH |
4777 | if (!coding->dst_multibyte) |
4778 | { | |
4779 | coding->produced = str_as_unibyte (destination, coding->produced); | |
4780 | coding->produced_char = coding->produced; | |
4781 | } | |
4ed46869 | 4782 | |
b73bfc1c KH |
4783 | return coding->result; |
4784 | } | |
52d41803 | 4785 | |
b73bfc1c KH |
4786 | /* See "GENERAL NOTES about `encode_coding_XXX ()' functions". The |
4787 | multibyteness of the source is CODING->src_multibyte, the | |
4788 | multibyteness of the result is always unibyte. */ | |
4ed46869 KH |
4789 | |
4790 | int | |
d46c5b12 | 4791 | encode_coding (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 4792 | struct coding_system *coding; |
a4244313 KR |
4793 | const unsigned char *source; |
4794 | unsigned char *destination; | |
4ed46869 | 4795 | int src_bytes, dst_bytes; |
4ed46869 | 4796 | { |
b73bfc1c KH |
4797 | coding->produced = coding->produced_char = 0; |
4798 | coding->consumed = coding->consumed_char = 0; | |
4799 | coding->errors = 0; | |
4800 | coding->result = CODING_FINISH_NORMAL; | |
4ed46869 | 4801 | |
d46c5b12 KH |
4802 | switch (coding->type) |
4803 | { | |
4ed46869 | 4804 | case coding_type_sjis: |
b73bfc1c KH |
4805 | encode_coding_sjis_big5 (coding, source, destination, |
4806 | src_bytes, dst_bytes, 1); | |
4ed46869 KH |
4807 | break; |
4808 | ||
4809 | case coding_type_iso2022: | |
b73bfc1c KH |
4810 | encode_coding_iso2022 (coding, source, destination, |
4811 | src_bytes, dst_bytes); | |
4ed46869 KH |
4812 | break; |
4813 | ||
4814 | case coding_type_big5: | |
b73bfc1c KH |
4815 | encode_coding_sjis_big5 (coding, source, destination, |
4816 | src_bytes, dst_bytes, 0); | |
4817 | break; | |
4818 | ||
4819 | case coding_type_emacs_mule: | |
4820 | encode_coding_emacs_mule (coding, source, destination, | |
4821 | src_bytes, dst_bytes); | |
4ed46869 KH |
4822 | break; |
4823 | ||
4824 | case coding_type_ccl: | |
b73bfc1c KH |
4825 | ccl_coding_driver (coding, source, destination, |
4826 | src_bytes, dst_bytes, 1); | |
d46c5b12 KH |
4827 | break; |
4828 | ||
b73bfc1c KH |
4829 | default: |
4830 | encode_eol (coding, source, destination, src_bytes, dst_bytes); | |
4831 | } | |
4832 | ||
73be902c KH |
4833 | if (coding->mode & CODING_MODE_LAST_BLOCK |
4834 | && coding->result == CODING_FINISH_INSUFFICIENT_SRC) | |
b73bfc1c | 4835 | { |
a4244313 | 4836 | const unsigned char *src = source + coding->consumed; |
b73bfc1c KH |
4837 | unsigned char *dst = destination + coding->produced; |
4838 | ||
4839 | if (coding->type == coding_type_iso2022) | |
4840 | ENCODE_RESET_PLANE_AND_REGISTER; | |
4841 | if (COMPOSING_P (coding)) | |
4842 | *dst++ = ISO_CODE_ESC, *dst++ = '1'; | |
4843 | if (coding->consumed < src_bytes) | |
d46c5b12 | 4844 | { |
b73bfc1c KH |
4845 | int len = src_bytes - coding->consumed; |
4846 | ||
fabf4a91 | 4847 | BCOPY_SHORT (src, dst, len); |
b73bfc1c KH |
4848 | if (coding->src_multibyte) |
4849 | len = str_as_unibyte (dst, len); | |
4850 | dst += len; | |
4851 | coding->consumed = src_bytes; | |
d46c5b12 | 4852 | } |
b73bfc1c | 4853 | coding->produced = coding->produced_char = dst - destination; |
73be902c | 4854 | coding->result = CODING_FINISH_NORMAL; |
4ed46869 KH |
4855 | } |
4856 | ||
bb10be8b KH |
4857 | if (coding->result == CODING_FINISH_INSUFFICIENT_SRC |
4858 | && coding->consumed == src_bytes) | |
4859 | coding->result = CODING_FINISH_NORMAL; | |
4860 | ||
b73bfc1c | 4861 | return coding->result; |
4ed46869 KH |
4862 | } |
4863 | ||
fb88bf2d KH |
4864 | /* Scan text in the region between *BEG and *END (byte positions), |
4865 | skip characters which we don't have to decode by coding system | |
4866 | CODING at the head and tail, then set *BEG and *END to the region | |
4867 | of the text we actually have to convert. The caller should move | |
b73bfc1c KH |
4868 | the gap out of the region in advance if the region is from a |
4869 | buffer. | |
4ed46869 | 4870 | |
d46c5b12 KH |
4871 | If STR is not NULL, *BEG and *END are indices into STR. */ |
4872 | ||
4873 | static void | |
4874 | shrink_decoding_region (beg, end, coding, str) | |
4875 | int *beg, *end; | |
4876 | struct coding_system *coding; | |
4877 | unsigned char *str; | |
4878 | { | |
fb88bf2d | 4879 | unsigned char *begp_orig, *begp, *endp_orig, *endp, c; |
d46c5b12 | 4880 | int eol_conversion; |
88993dfd | 4881 | Lisp_Object translation_table; |
d46c5b12 KH |
4882 | |
4883 | if (coding->type == coding_type_ccl | |
4884 | || coding->type == coding_type_undecided | |
b73bfc1c KH |
4885 | || coding->eol_type != CODING_EOL_LF |
4886 | || !NILP (coding->post_read_conversion) | |
4887 | || coding->composing != COMPOSITION_DISABLED) | |
d46c5b12 KH |
4888 | { |
4889 | /* We can't skip any data. */ | |
4890 | return; | |
4891 | } | |
b73bfc1c KH |
4892 | if (coding->type == coding_type_no_conversion |
4893 | || coding->type == coding_type_raw_text | |
4894 | || coding->type == coding_type_emacs_mule) | |
d46c5b12 | 4895 | { |
fb88bf2d KH |
4896 | /* We need no conversion, but don't have to skip any data here. |
4897 | Decoding routine handles them effectively anyway. */ | |
d46c5b12 KH |
4898 | return; |
4899 | } | |
4900 | ||
88993dfd KH |
4901 | translation_table = coding->translation_table_for_decode; |
4902 | if (NILP (translation_table) && !NILP (Venable_character_translation)) | |
4903 | translation_table = Vstandard_translation_table_for_decode; | |
4904 | if (CHAR_TABLE_P (translation_table)) | |
4905 | { | |
4906 | int i; | |
4907 | for (i = 0; i < 128; i++) | |
4908 | if (!NILP (CHAR_TABLE_REF (translation_table, i))) | |
4909 | break; | |
4910 | if (i < 128) | |
fa46990e | 4911 | /* Some ASCII character should be translated. We give up |
88993dfd KH |
4912 | shrinking. */ |
4913 | return; | |
4914 | } | |
4915 | ||
b73bfc1c | 4916 | if (coding->heading_ascii >= 0) |
d46c5b12 KH |
4917 | /* Detection routine has already found how much we can skip at the |
4918 | head. */ | |
4919 | *beg += coding->heading_ascii; | |
4920 | ||
4921 | if (str) | |
4922 | { | |
4923 | begp_orig = begp = str + *beg; | |
4924 | endp_orig = endp = str + *end; | |
4925 | } | |
4926 | else | |
4927 | { | |
fb88bf2d | 4928 | begp_orig = begp = BYTE_POS_ADDR (*beg); |
d46c5b12 KH |
4929 | endp_orig = endp = begp + *end - *beg; |
4930 | } | |
4931 | ||
fa46990e DL |
4932 | eol_conversion = (coding->eol_type == CODING_EOL_CR |
4933 | || coding->eol_type == CODING_EOL_CRLF); | |
4934 | ||
d46c5b12 KH |
4935 | switch (coding->type) |
4936 | { | |
d46c5b12 KH |
4937 | case coding_type_sjis: |
4938 | case coding_type_big5: | |
4939 | /* We can skip all ASCII characters at the head. */ | |
4940 | if (coding->heading_ascii < 0) | |
4941 | { | |
4942 | if (eol_conversion) | |
de9d083c | 4943 | while (begp < endp && *begp < 0x80 && *begp != '\r') begp++; |
d46c5b12 KH |
4944 | else |
4945 | while (begp < endp && *begp < 0x80) begp++; | |
4946 | } | |
4947 | /* We can skip all ASCII characters at the tail except for the | |
4948 | second byte of SJIS or BIG5 code. */ | |
4949 | if (eol_conversion) | |
de9d083c | 4950 | while (begp < endp && endp[-1] < 0x80 && endp[-1] != '\r') endp--; |
d46c5b12 KH |
4951 | else |
4952 | while (begp < endp && endp[-1] < 0x80) endp--; | |
ee59c65f RS |
4953 | /* Do not consider LF as ascii if preceded by CR, since that |
4954 | confuses eol decoding. */ | |
4955 | if (begp < endp && endp < endp_orig && endp[-1] == '\r' && endp[0] == '\n') | |
4956 | endp++; | |
d46c5b12 KH |
4957 | if (begp < endp && endp < endp_orig && endp[-1] >= 0x80) |
4958 | endp++; | |
4959 | break; | |
4960 | ||
b73bfc1c | 4961 | case coding_type_iso2022: |
622fece5 KH |
4962 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, 0) != CHARSET_ASCII) |
4963 | /* We can't skip any data. */ | |
4964 | break; | |
d46c5b12 KH |
4965 | if (coding->heading_ascii < 0) |
4966 | { | |
d46c5b12 KH |
4967 | /* We can skip all ASCII characters at the head except for a |
4968 | few control codes. */ | |
4969 | while (begp < endp && (c = *begp) < 0x80 | |
4970 | && c != ISO_CODE_CR && c != ISO_CODE_SO | |
4971 | && c != ISO_CODE_SI && c != ISO_CODE_ESC | |
4972 | && (!eol_conversion || c != ISO_CODE_LF)) | |
4973 | begp++; | |
4974 | } | |
4975 | switch (coding->category_idx) | |
4976 | { | |
4977 | case CODING_CATEGORY_IDX_ISO_8_1: | |
4978 | case CODING_CATEGORY_IDX_ISO_8_2: | |
4979 | /* We can skip all ASCII characters at the tail. */ | |
4980 | if (eol_conversion) | |
de9d083c | 4981 | while (begp < endp && (c = endp[-1]) < 0x80 && c != '\r') endp--; |
d46c5b12 KH |
4982 | else |
4983 | while (begp < endp && endp[-1] < 0x80) endp--; | |
ee59c65f RS |
4984 | /* Do not consider LF as ascii if preceded by CR, since that |
4985 | confuses eol decoding. */ | |
4986 | if (begp < endp && endp < endp_orig && endp[-1] == '\r' && endp[0] == '\n') | |
4987 | endp++; | |
d46c5b12 KH |
4988 | break; |
4989 | ||
4990 | case CODING_CATEGORY_IDX_ISO_7: | |
4991 | case CODING_CATEGORY_IDX_ISO_7_TIGHT: | |
de79a6a5 | 4992 | { |
8ca3766a | 4993 | /* We can skip all characters at the tail except for 8-bit |
de79a6a5 KH |
4994 | codes and ESC and the following 2-byte at the tail. */ |
4995 | unsigned char *eight_bit = NULL; | |
4996 | ||
4997 | if (eol_conversion) | |
4998 | while (begp < endp | |
4999 | && (c = endp[-1]) != ISO_CODE_ESC && c != '\r') | |
5000 | { | |
5001 | if (!eight_bit && c & 0x80) eight_bit = endp; | |
5002 | endp--; | |
5003 | } | |
5004 | else | |
5005 | while (begp < endp | |
5006 | && (c = endp[-1]) != ISO_CODE_ESC) | |
5007 | { | |
5008 | if (!eight_bit && c & 0x80) eight_bit = endp; | |
5009 | endp--; | |
5010 | } | |
5011 | /* Do not consider LF as ascii if preceded by CR, since that | |
5012 | confuses eol decoding. */ | |
5013 | if (begp < endp && endp < endp_orig | |
5014 | && endp[-1] == '\r' && endp[0] == '\n') | |
5015 | endp++; | |
5016 | if (begp < endp && endp[-1] == ISO_CODE_ESC) | |
5017 | { | |
5018 | if (endp + 1 < endp_orig && end[0] == '(' && end[1] == 'B') | |
5019 | /* This is an ASCII designation sequence. We can | |
5020 | surely skip the tail. But, if we have | |
5021 | encountered an 8-bit code, skip only the codes | |
5022 | after that. */ | |
5023 | endp = eight_bit ? eight_bit : endp + 2; | |
5024 | else | |
5025 | /* Hmmm, we can't skip the tail. */ | |
5026 | endp = endp_orig; | |
5027 | } | |
5028 | else if (eight_bit) | |
5029 | endp = eight_bit; | |
5030 | } | |
d46c5b12 | 5031 | } |
b73bfc1c KH |
5032 | break; |
5033 | ||
5034 | default: | |
5035 | abort (); | |
d46c5b12 KH |
5036 | } |
5037 | *beg += begp - begp_orig; | |
5038 | *end += endp - endp_orig; | |
5039 | return; | |
5040 | } | |
5041 | ||
5042 | /* Like shrink_decoding_region but for encoding. */ | |
5043 | ||
5044 | static void | |
5045 | shrink_encoding_region (beg, end, coding, str) | |
5046 | int *beg, *end; | |
5047 | struct coding_system *coding; | |
5048 | unsigned char *str; | |
5049 | { | |
5050 | unsigned char *begp_orig, *begp, *endp_orig, *endp; | |
5051 | int eol_conversion; | |
88993dfd | 5052 | Lisp_Object translation_table; |
d46c5b12 | 5053 | |
b73bfc1c KH |
5054 | if (coding->type == coding_type_ccl |
5055 | || coding->eol_type == CODING_EOL_CRLF | |
5056 | || coding->eol_type == CODING_EOL_CR | |
87323294 | 5057 | || (coding->cmp_data && coding->cmp_data->used > 0)) |
d46c5b12 | 5058 | { |
b73bfc1c KH |
5059 | /* We can't skip any data. */ |
5060 | return; | |
5061 | } | |
5062 | if (coding->type == coding_type_no_conversion | |
5063 | || coding->type == coding_type_raw_text | |
5064 | || coding->type == coding_type_emacs_mule | |
5065 | || coding->type == coding_type_undecided) | |
5066 | { | |
5067 | /* We need no conversion, but don't have to skip any data here. | |
5068 | Encoding routine handles them effectively anyway. */ | |
d46c5b12 KH |
5069 | return; |
5070 | } | |
5071 | ||
88993dfd KH |
5072 | translation_table = coding->translation_table_for_encode; |
5073 | if (NILP (translation_table) && !NILP (Venable_character_translation)) | |
5074 | translation_table = Vstandard_translation_table_for_encode; | |
5075 | if (CHAR_TABLE_P (translation_table)) | |
5076 | { | |
5077 | int i; | |
5078 | for (i = 0; i < 128; i++) | |
5079 | if (!NILP (CHAR_TABLE_REF (translation_table, i))) | |
5080 | break; | |
5081 | if (i < 128) | |
8ca3766a | 5082 | /* Some ASCII character should be translated. We give up |
88993dfd KH |
5083 | shrinking. */ |
5084 | return; | |
5085 | } | |
5086 | ||
d46c5b12 KH |
5087 | if (str) |
5088 | { | |
5089 | begp_orig = begp = str + *beg; | |
5090 | endp_orig = endp = str + *end; | |
5091 | } | |
5092 | else | |
5093 | { | |
fb88bf2d | 5094 | begp_orig = begp = BYTE_POS_ADDR (*beg); |
d46c5b12 KH |
5095 | endp_orig = endp = begp + *end - *beg; |
5096 | } | |
5097 | ||
5098 | eol_conversion = (coding->eol_type == CODING_EOL_CR | |
5099 | || coding->eol_type == CODING_EOL_CRLF); | |
5100 | ||
5101 | /* Here, we don't have to check coding->pre_write_conversion because | |
5102 | the caller is expected to have handled it already. */ | |
5103 | switch (coding->type) | |
5104 | { | |
d46c5b12 | 5105 | case coding_type_iso2022: |
622fece5 KH |
5106 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, 0) != CHARSET_ASCII) |
5107 | /* We can't skip any data. */ | |
5108 | break; | |
d46c5b12 KH |
5109 | if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL) |
5110 | { | |
93dec019 | 5111 | unsigned char *bol = begp; |
d46c5b12 KH |
5112 | while (begp < endp && *begp < 0x80) |
5113 | { | |
5114 | begp++; | |
5115 | if (begp[-1] == '\n') | |
5116 | bol = begp; | |
5117 | } | |
5118 | begp = bol; | |
5119 | goto label_skip_tail; | |
5120 | } | |
5121 | /* fall down ... */ | |
5122 | ||
b73bfc1c KH |
5123 | case coding_type_sjis: |
5124 | case coding_type_big5: | |
d46c5b12 KH |
5125 | /* We can skip all ASCII characters at the head and tail. */ |
5126 | if (eol_conversion) | |
5127 | while (begp < endp && *begp < 0x80 && *begp != '\n') begp++; | |
5128 | else | |
5129 | while (begp < endp && *begp < 0x80) begp++; | |
5130 | label_skip_tail: | |
5131 | if (eol_conversion) | |
5132 | while (begp < endp && endp[-1] < 0x80 && endp[-1] != '\n') endp--; | |
5133 | else | |
5134 | while (begp < endp && *(endp - 1) < 0x80) endp--; | |
5135 | break; | |
b73bfc1c KH |
5136 | |
5137 | default: | |
5138 | abort (); | |
d46c5b12 KH |
5139 | } |
5140 | ||
5141 | *beg += begp - begp_orig; | |
5142 | *end += endp - endp_orig; | |
5143 | return; | |
5144 | } | |
5145 | ||
88993dfd KH |
5146 | /* As shrinking conversion region requires some overhead, we don't try |
5147 | shrinking if the length of conversion region is less than this | |
5148 | value. */ | |
5149 | static int shrink_conversion_region_threshhold = 1024; | |
5150 | ||
5151 | #define SHRINK_CONVERSION_REGION(beg, end, coding, str, encodep) \ | |
5152 | do { \ | |
5153 | if (*(end) - *(beg) > shrink_conversion_region_threshhold) \ | |
5154 | { \ | |
5155 | if (encodep) shrink_encoding_region (beg, end, coding, str); \ | |
5156 | else shrink_decoding_region (beg, end, coding, str); \ | |
5157 | } \ | |
5158 | } while (0) | |
5159 | ||
b843d1ae KH |
5160 | static Lisp_Object |
5161 | code_convert_region_unwind (dummy) | |
5162 | Lisp_Object dummy; | |
5163 | { | |
5164 | inhibit_pre_post_conversion = 0; | |
5165 | return Qnil; | |
5166 | } | |
5167 | ||
ec6d2bb8 KH |
5168 | /* Store information about all compositions in the range FROM and TO |
5169 | of OBJ in memory blocks pointed by CODING->cmp_data. OBJ is a | |
5170 | buffer or a string, defaults to the current buffer. */ | |
5171 | ||
5172 | void | |
5173 | coding_save_composition (coding, from, to, obj) | |
5174 | struct coding_system *coding; | |
5175 | int from, to; | |
5176 | Lisp_Object obj; | |
5177 | { | |
5178 | Lisp_Object prop; | |
5179 | int start, end; | |
5180 | ||
91bee881 KH |
5181 | if (coding->composing == COMPOSITION_DISABLED) |
5182 | return; | |
5183 | if (!coding->cmp_data) | |
5184 | coding_allocate_composition_data (coding, from); | |
ec6d2bb8 KH |
5185 | if (!find_composition (from, to, &start, &end, &prop, obj) |
5186 | || end > to) | |
5187 | return; | |
5188 | if (start < from | |
5189 | && (!find_composition (end, to, &start, &end, &prop, obj) | |
5190 | || end > to)) | |
5191 | return; | |
5192 | coding->composing = COMPOSITION_NO; | |
ec6d2bb8 KH |
5193 | do |
5194 | { | |
5195 | if (COMPOSITION_VALID_P (start, end, prop)) | |
5196 | { | |
5197 | enum composition_method method = COMPOSITION_METHOD (prop); | |
5198 | if (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH | |
5199 | >= COMPOSITION_DATA_SIZE) | |
5200 | coding_allocate_composition_data (coding, from); | |
5201 | /* For relative composition, we remember start and end | |
5202 | positions, for the other compositions, we also remember | |
5203 | components. */ | |
5204 | CODING_ADD_COMPOSITION_START (coding, start - from, method); | |
5205 | if (method != COMPOSITION_RELATIVE) | |
5206 | { | |
5207 | /* We must store a*/ | |
5208 | Lisp_Object val, ch; | |
5209 | ||
5210 | val = COMPOSITION_COMPONENTS (prop); | |
5211 | if (CONSP (val)) | |
5212 | while (CONSP (val)) | |
5213 | { | |
5214 | ch = XCAR (val), val = XCDR (val); | |
5215 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (ch)); | |
5216 | } | |
5217 | else if (VECTORP (val) || STRINGP (val)) | |
5218 | { | |
5219 | int len = (VECTORP (val) | |
d5db4077 | 5220 | ? XVECTOR (val)->size : SCHARS (val)); |
ec6d2bb8 KH |
5221 | int i; |
5222 | for (i = 0; i < len; i++) | |
5223 | { | |
5224 | ch = (STRINGP (val) | |
5225 | ? Faref (val, make_number (i)) | |
5226 | : XVECTOR (val)->contents[i]); | |
5227 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (ch)); | |
5228 | } | |
5229 | } | |
5230 | else /* INTEGERP (val) */ | |
5231 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (val)); | |
5232 | } | |
5233 | CODING_ADD_COMPOSITION_END (coding, end - from); | |
5234 | } | |
5235 | start = end; | |
5236 | } | |
5237 | while (start < to | |
5238 | && find_composition (start, to, &start, &end, &prop, obj) | |
5239 | && end <= to); | |
5240 | ||
5241 | /* Make coding->cmp_data point to the first memory block. */ | |
5242 | while (coding->cmp_data->prev) | |
5243 | coding->cmp_data = coding->cmp_data->prev; | |
5244 | coding->cmp_data_start = 0; | |
5245 | } | |
5246 | ||
5247 | /* Reflect the saved information about compositions to OBJ. | |
8ca3766a | 5248 | CODING->cmp_data points to a memory block for the information. OBJ |
ec6d2bb8 KH |
5249 | is a buffer or a string, defaults to the current buffer. */ |
5250 | ||
33fb63eb | 5251 | void |
ec6d2bb8 KH |
5252 | coding_restore_composition (coding, obj) |
5253 | struct coding_system *coding; | |
5254 | Lisp_Object obj; | |
5255 | { | |
5256 | struct composition_data *cmp_data = coding->cmp_data; | |
5257 | ||
5258 | if (!cmp_data) | |
5259 | return; | |
5260 | ||
5261 | while (cmp_data->prev) | |
5262 | cmp_data = cmp_data->prev; | |
5263 | ||
5264 | while (cmp_data) | |
5265 | { | |
5266 | int i; | |
5267 | ||
78108bcd KH |
5268 | for (i = 0; i < cmp_data->used && cmp_data->data[i] > 0; |
5269 | i += cmp_data->data[i]) | |
ec6d2bb8 KH |
5270 | { |
5271 | int *data = cmp_data->data + i; | |
5272 | enum composition_method method = (enum composition_method) data[3]; | |
5273 | Lisp_Object components; | |
5274 | ||
5275 | if (method == COMPOSITION_RELATIVE) | |
5276 | components = Qnil; | |
5277 | else | |
5278 | { | |
5279 | int len = data[0] - 4, j; | |
5280 | Lisp_Object args[MAX_COMPOSITION_COMPONENTS * 2 - 1]; | |
5281 | ||
5282 | for (j = 0; j < len; j++) | |
5283 | args[j] = make_number (data[4 + j]); | |
5284 | components = (method == COMPOSITION_WITH_ALTCHARS | |
5285 | ? Fstring (len, args) : Fvector (len, args)); | |
5286 | } | |
5287 | compose_text (data[1], data[2], components, Qnil, obj); | |
5288 | } | |
5289 | cmp_data = cmp_data->next; | |
5290 | } | |
5291 | } | |
5292 | ||
d46c5b12 | 5293 | /* Decode (if ENCODEP is zero) or encode (if ENCODEP is nonzero) the |
fb88bf2d KH |
5294 | text from FROM to TO (byte positions are FROM_BYTE and TO_BYTE) by |
5295 | coding system CODING, and return the status code of code conversion | |
5296 | (currently, this value has no meaning). | |
5297 | ||
5298 | How many characters (and bytes) are converted to how many | |
5299 | characters (and bytes) are recorded in members of the structure | |
5300 | CODING. | |
d46c5b12 | 5301 | |
6e44253b | 5302 | If REPLACE is nonzero, we do various things as if the original text |
d46c5b12 | 5303 | is deleted and a new text is inserted. See the comments in |
b73bfc1c KH |
5304 | replace_range (insdel.c) to know what we are doing. |
5305 | ||
5306 | If REPLACE is zero, it is assumed that the source text is unibyte. | |
8ca3766a | 5307 | Otherwise, it is assumed that the source text is multibyte. */ |
4ed46869 KH |
5308 | |
5309 | int | |
6e44253b KH |
5310 | code_convert_region (from, from_byte, to, to_byte, coding, encodep, replace) |
5311 | int from, from_byte, to, to_byte, encodep, replace; | |
4ed46869 | 5312 | struct coding_system *coding; |
4ed46869 | 5313 | { |
fb88bf2d | 5314 | int len = to - from, len_byte = to_byte - from_byte; |
72d1a715 | 5315 | int nchars_del = 0, nbytes_del = 0; |
fb88bf2d | 5316 | int require, inserted, inserted_byte; |
4b39528c | 5317 | int head_skip, tail_skip, total_skip = 0; |
84d60297 | 5318 | Lisp_Object saved_coding_symbol; |
fb88bf2d | 5319 | int first = 1; |
fb88bf2d | 5320 | unsigned char *src, *dst; |
84d60297 | 5321 | Lisp_Object deletion; |
e133c8fa | 5322 | int orig_point = PT, orig_len = len; |
6abb9bd9 | 5323 | int prev_Z; |
b73bfc1c KH |
5324 | int multibyte_p = !NILP (current_buffer->enable_multibyte_characters); |
5325 | ||
84d60297 | 5326 | deletion = Qnil; |
8844fa83 | 5327 | saved_coding_symbol = coding->symbol; |
d46c5b12 | 5328 | |
83fa074f | 5329 | if (from < PT && PT < to) |
e133c8fa KH |
5330 | { |
5331 | TEMP_SET_PT_BOTH (from, from_byte); | |
5332 | orig_point = from; | |
5333 | } | |
83fa074f | 5334 | |
6e44253b | 5335 | if (replace) |
d46c5b12 | 5336 | { |
fb88bf2d | 5337 | int saved_from = from; |
e077cc80 | 5338 | int saved_inhibit_modification_hooks; |
fb88bf2d | 5339 | |
d46c5b12 | 5340 | prepare_to_modify_buffer (from, to, &from); |
fb88bf2d KH |
5341 | if (saved_from != from) |
5342 | { | |
5343 | to = from + len; | |
b73bfc1c | 5344 | from_byte = CHAR_TO_BYTE (from), to_byte = CHAR_TO_BYTE (to); |
fb88bf2d KH |
5345 | len_byte = to_byte - from_byte; |
5346 | } | |
e077cc80 KH |
5347 | |
5348 | /* The code conversion routine can not preserve text properties | |
5349 | for now. So, we must remove all text properties in the | |
5350 | region. Here, we must suppress all modification hooks. */ | |
5351 | saved_inhibit_modification_hooks = inhibit_modification_hooks; | |
5352 | inhibit_modification_hooks = 1; | |
5353 | Fset_text_properties (make_number (from), make_number (to), Qnil, Qnil); | |
5354 | inhibit_modification_hooks = saved_inhibit_modification_hooks; | |
d46c5b12 | 5355 | } |
d46c5b12 KH |
5356 | |
5357 | if (! encodep && CODING_REQUIRE_DETECTION (coding)) | |
5358 | { | |
12410ef1 | 5359 | /* We must detect encoding of text and eol format. */ |
d46c5b12 KH |
5360 | |
5361 | if (from < GPT && to > GPT) | |
5362 | move_gap_both (from, from_byte); | |
5363 | if (coding->type == coding_type_undecided) | |
5364 | { | |
fb88bf2d | 5365 | detect_coding (coding, BYTE_POS_ADDR (from_byte), len_byte); |
d46c5b12 | 5366 | if (coding->type == coding_type_undecided) |
62b3ef1d KH |
5367 | { |
5368 | /* It seems that the text contains only ASCII, but we | |
d9aef30f | 5369 | should not leave it undecided because the deeper |
62b3ef1d KH |
5370 | decoding routine (decode_coding) tries to detect the |
5371 | encodings again in vain. */ | |
5372 | coding->type = coding_type_emacs_mule; | |
5373 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
d280ccb6 KH |
5374 | /* As emacs-mule decoder will handle composition, we |
5375 | need this setting to allocate coding->cmp_data | |
5376 | later. */ | |
5377 | coding->composing = COMPOSITION_NO; | |
62b3ef1d | 5378 | } |
d46c5b12 | 5379 | } |
aaaf0b1e KH |
5380 | if (coding->eol_type == CODING_EOL_UNDECIDED |
5381 | && coding->type != coding_type_ccl) | |
d46c5b12 | 5382 | { |
d46c5b12 KH |
5383 | detect_eol (coding, BYTE_POS_ADDR (from_byte), len_byte); |
5384 | if (coding->eol_type == CODING_EOL_UNDECIDED) | |
5385 | coding->eol_type = CODING_EOL_LF; | |
5386 | /* We had better recover the original eol format if we | |
8ca3766a | 5387 | encounter an inconsistent eol format while decoding. */ |
d46c5b12 KH |
5388 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
5389 | } | |
5390 | } | |
5391 | ||
d46c5b12 KH |
5392 | /* Now we convert the text. */ |
5393 | ||
5394 | /* For encoding, we must process pre-write-conversion in advance. */ | |
b73bfc1c KH |
5395 | if (! inhibit_pre_post_conversion |
5396 | && encodep | |
d46c5b12 KH |
5397 | && SYMBOLP (coding->pre_write_conversion) |
5398 | && ! NILP (Ffboundp (coding->pre_write_conversion))) | |
5399 | { | |
2b4f9037 KH |
5400 | /* The function in pre-write-conversion may put a new text in a |
5401 | new buffer. */ | |
0007bdd0 KH |
5402 | struct buffer *prev = current_buffer; |
5403 | Lisp_Object new; | |
d46c5b12 | 5404 | |
b843d1ae KH |
5405 | record_unwind_protect (code_convert_region_unwind, Qnil); |
5406 | /* We should not call any more pre-write/post-read-conversion | |
5407 | functions while this pre-write-conversion is running. */ | |
5408 | inhibit_pre_post_conversion = 1; | |
b39f748c AS |
5409 | call2 (coding->pre_write_conversion, |
5410 | make_number (from), make_number (to)); | |
b843d1ae KH |
5411 | inhibit_pre_post_conversion = 0; |
5412 | /* Discard the unwind protect. */ | |
5413 | specpdl_ptr--; | |
5414 | ||
d46c5b12 KH |
5415 | if (current_buffer != prev) |
5416 | { | |
5417 | len = ZV - BEGV; | |
0007bdd0 | 5418 | new = Fcurrent_buffer (); |
d46c5b12 | 5419 | set_buffer_internal_1 (prev); |
7dae4502 | 5420 | del_range_2 (from, from_byte, to, to_byte, 0); |
e133c8fa | 5421 | TEMP_SET_PT_BOTH (from, from_byte); |
0007bdd0 KH |
5422 | insert_from_buffer (XBUFFER (new), 1, len, 0); |
5423 | Fkill_buffer (new); | |
e133c8fa KH |
5424 | if (orig_point >= to) |
5425 | orig_point += len - orig_len; | |
5426 | else if (orig_point > from) | |
5427 | orig_point = from; | |
5428 | orig_len = len; | |
d46c5b12 | 5429 | to = from + len; |
b73bfc1c KH |
5430 | from_byte = CHAR_TO_BYTE (from); |
5431 | to_byte = CHAR_TO_BYTE (to); | |
d46c5b12 | 5432 | len_byte = to_byte - from_byte; |
e133c8fa | 5433 | TEMP_SET_PT_BOTH (from, from_byte); |
d46c5b12 KH |
5434 | } |
5435 | } | |
5436 | ||
12410ef1 | 5437 | if (replace) |
72d1a715 RS |
5438 | { |
5439 | if (! EQ (current_buffer->undo_list, Qt)) | |
5440 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); | |
5441 | else | |
5442 | { | |
5443 | nchars_del = to - from; | |
5444 | nbytes_del = to_byte - from_byte; | |
5445 | } | |
5446 | } | |
12410ef1 | 5447 | |
ec6d2bb8 KH |
5448 | if (coding->composing != COMPOSITION_DISABLED) |
5449 | { | |
5450 | if (encodep) | |
5451 | coding_save_composition (coding, from, to, Fcurrent_buffer ()); | |
5452 | else | |
5453 | coding_allocate_composition_data (coding, from); | |
5454 | } | |
fb88bf2d | 5455 | |
b73bfc1c | 5456 | /* Try to skip the heading and tailing ASCIIs. */ |
4956c225 KH |
5457 | if (coding->type != coding_type_ccl) |
5458 | { | |
5459 | int from_byte_orig = from_byte, to_byte_orig = to_byte; | |
ec6d2bb8 | 5460 | |
4956c225 KH |
5461 | if (from < GPT && GPT < to) |
5462 | move_gap_both (from, from_byte); | |
5463 | SHRINK_CONVERSION_REGION (&from_byte, &to_byte, coding, NULL, encodep); | |
5464 | if (from_byte == to_byte | |
5465 | && (encodep || NILP (coding->post_read_conversion)) | |
5466 | && ! CODING_REQUIRE_FLUSHING (coding)) | |
5467 | { | |
5468 | coding->produced = len_byte; | |
5469 | coding->produced_char = len; | |
5470 | if (!replace) | |
5471 | /* We must record and adjust for this new text now. */ | |
5472 | adjust_after_insert (from, from_byte_orig, to, to_byte_orig, len); | |
5473 | return 0; | |
5474 | } | |
5475 | ||
5476 | head_skip = from_byte - from_byte_orig; | |
5477 | tail_skip = to_byte_orig - to_byte; | |
5478 | total_skip = head_skip + tail_skip; | |
5479 | from += head_skip; | |
5480 | to -= tail_skip; | |
5481 | len -= total_skip; len_byte -= total_skip; | |
5482 | } | |
d46c5b12 | 5483 | |
8ca3766a | 5484 | /* For conversion, we must put the gap before the text in addition to |
fb88bf2d KH |
5485 | making the gap larger for efficient decoding. The required gap |
5486 | size starts from 2000 which is the magic number used in make_gap. | |
5487 | But, after one batch of conversion, it will be incremented if we | |
5488 | find that it is not enough . */ | |
d46c5b12 KH |
5489 | require = 2000; |
5490 | ||
5491 | if (GAP_SIZE < require) | |
5492 | make_gap (require - GAP_SIZE); | |
5493 | move_gap_both (from, from_byte); | |
5494 | ||
d46c5b12 | 5495 | inserted = inserted_byte = 0; |
fb88bf2d KH |
5496 | |
5497 | GAP_SIZE += len_byte; | |
5498 | ZV -= len; | |
5499 | Z -= len; | |
5500 | ZV_BYTE -= len_byte; | |
5501 | Z_BYTE -= len_byte; | |
5502 | ||
d9f9a1bc GM |
5503 | if (GPT - BEG < BEG_UNCHANGED) |
5504 | BEG_UNCHANGED = GPT - BEG; | |
5505 | if (Z - GPT < END_UNCHANGED) | |
5506 | END_UNCHANGED = Z - GPT; | |
f2558efd | 5507 | |
b73bfc1c KH |
5508 | if (!encodep && coding->src_multibyte) |
5509 | { | |
5510 | /* Decoding routines expects that the source text is unibyte. | |
5511 | We must convert 8-bit characters of multibyte form to | |
5512 | unibyte. */ | |
5513 | int len_byte_orig = len_byte; | |
5514 | len_byte = str_as_unibyte (GAP_END_ADDR - len_byte, len_byte); | |
5515 | if (len_byte < len_byte_orig) | |
5516 | safe_bcopy (GAP_END_ADDR - len_byte_orig, GAP_END_ADDR - len_byte, | |
5517 | len_byte); | |
5518 | coding->src_multibyte = 0; | |
5519 | } | |
5520 | ||
d46c5b12 KH |
5521 | for (;;) |
5522 | { | |
fb88bf2d | 5523 | int result; |
d46c5b12 | 5524 | |
ec6d2bb8 | 5525 | /* The buffer memory is now: |
b73bfc1c KH |
5526 | +--------+converted-text+---------+-------original-text-------+---+ |
5527 | |<-from->|<--inserted-->|---------|<--------len_byte--------->|---| | |
5528 | |<---------------------- GAP ----------------------->| */ | |
ec6d2bb8 KH |
5529 | src = GAP_END_ADDR - len_byte; |
5530 | dst = GPT_ADDR + inserted_byte; | |
5531 | ||
d46c5b12 | 5532 | if (encodep) |
fb88bf2d | 5533 | result = encode_coding (coding, src, dst, len_byte, 0); |
d46c5b12 | 5534 | else |
0e79d667 RS |
5535 | { |
5536 | if (coding->composing != COMPOSITION_DISABLED) | |
5537 | coding->cmp_data->char_offset = from + inserted; | |
5538 | result = decode_coding (coding, src, dst, len_byte, 0); | |
5539 | } | |
ec6d2bb8 KH |
5540 | |
5541 | /* The buffer memory is now: | |
b73bfc1c KH |
5542 | +--------+-------converted-text----+--+------original-text----+---+ |
5543 | |<-from->|<-inserted->|<-produced->|--|<-(len_byte-consumed)->|---| | |
5544 | |<---------------------- GAP ----------------------->| */ | |
ec6d2bb8 | 5545 | |
d46c5b12 KH |
5546 | inserted += coding->produced_char; |
5547 | inserted_byte += coding->produced; | |
d46c5b12 | 5548 | len_byte -= coding->consumed; |
ec6d2bb8 KH |
5549 | |
5550 | if (result == CODING_FINISH_INSUFFICIENT_CMP) | |
5551 | { | |
5552 | coding_allocate_composition_data (coding, from + inserted); | |
5553 | continue; | |
5554 | } | |
5555 | ||
fb88bf2d | 5556 | src += coding->consumed; |
3636f7a3 | 5557 | dst += coding->produced; |
d46c5b12 | 5558 | |
9864ebce KH |
5559 | if (result == CODING_FINISH_NORMAL) |
5560 | { | |
5561 | src += len_byte; | |
5562 | break; | |
5563 | } | |
d46c5b12 KH |
5564 | if (! encodep && result == CODING_FINISH_INCONSISTENT_EOL) |
5565 | { | |
fb88bf2d | 5566 | unsigned char *pend = dst, *p = pend - inserted_byte; |
38edf7d4 | 5567 | Lisp_Object eol_type; |
d46c5b12 KH |
5568 | |
5569 | /* Encode LFs back to the original eol format (CR or CRLF). */ | |
5570 | if (coding->eol_type == CODING_EOL_CR) | |
5571 | { | |
5572 | while (p < pend) if (*p++ == '\n') p[-1] = '\r'; | |
5573 | } | |
5574 | else | |
5575 | { | |
d46c5b12 KH |
5576 | int count = 0; |
5577 | ||
fb88bf2d KH |
5578 | while (p < pend) if (*p++ == '\n') count++; |
5579 | if (src - dst < count) | |
d46c5b12 | 5580 | { |
38edf7d4 | 5581 | /* We don't have sufficient room for encoding LFs |
fb88bf2d KH |
5582 | back to CRLF. We must record converted and |
5583 | not-yet-converted text back to the buffer | |
5584 | content, enlarge the gap, then record them out of | |
5585 | the buffer contents again. */ | |
5586 | int add = len_byte + inserted_byte; | |
5587 | ||
5588 | GAP_SIZE -= add; | |
5589 | ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
5590 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5591 | make_gap (count - GAP_SIZE); | |
5592 | GAP_SIZE += add; | |
5593 | ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
5594 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
5595 | /* Don't forget to update SRC, DST, and PEND. */ | |
5596 | src = GAP_END_ADDR - len_byte; | |
5597 | dst = GPT_ADDR + inserted_byte; | |
5598 | pend = dst; | |
d46c5b12 | 5599 | } |
d46c5b12 KH |
5600 | inserted += count; |
5601 | inserted_byte += count; | |
fb88bf2d KH |
5602 | coding->produced += count; |
5603 | p = dst = pend + count; | |
5604 | while (count) | |
5605 | { | |
5606 | *--p = *--pend; | |
5607 | if (*p == '\n') count--, *--p = '\r'; | |
5608 | } | |
d46c5b12 KH |
5609 | } |
5610 | ||
5611 | /* Suppress eol-format conversion in the further conversion. */ | |
5612 | coding->eol_type = CODING_EOL_LF; | |
5613 | ||
38edf7d4 KH |
5614 | /* Set the coding system symbol to that for Unix-like EOL. */ |
5615 | eol_type = Fget (saved_coding_symbol, Qeol_type); | |
5616 | if (VECTORP (eol_type) | |
5617 | && XVECTOR (eol_type)->size == 3 | |
5618 | && SYMBOLP (XVECTOR (eol_type)->contents[CODING_EOL_LF])) | |
5619 | coding->symbol = XVECTOR (eol_type)->contents[CODING_EOL_LF]; | |
5620 | else | |
5621 | coding->symbol = saved_coding_symbol; | |
93dec019 | 5622 | |
fb88bf2d | 5623 | continue; |
d46c5b12 KH |
5624 | } |
5625 | if (len_byte <= 0) | |
944bd420 KH |
5626 | { |
5627 | if (coding->type != coding_type_ccl | |
5628 | || coding->mode & CODING_MODE_LAST_BLOCK) | |
5629 | break; | |
5630 | coding->mode |= CODING_MODE_LAST_BLOCK; | |
5631 | continue; | |
5632 | } | |
d46c5b12 KH |
5633 | if (result == CODING_FINISH_INSUFFICIENT_SRC) |
5634 | { | |
5635 | /* The source text ends in invalid codes. Let's just | |
5636 | make them valid buffer contents, and finish conversion. */ | |
70ad9fc4 GM |
5637 | if (multibyte_p) |
5638 | { | |
5639 | unsigned char *start = dst; | |
93dec019 | 5640 | |
70ad9fc4 GM |
5641 | inserted += len_byte; |
5642 | while (len_byte--) | |
5643 | { | |
5644 | int c = *src++; | |
5645 | dst += CHAR_STRING (c, dst); | |
5646 | } | |
5647 | ||
5648 | inserted_byte += dst - start; | |
5649 | } | |
5650 | else | |
5651 | { | |
5652 | inserted += len_byte; | |
5653 | inserted_byte += len_byte; | |
5654 | while (len_byte--) | |
5655 | *dst++ = *src++; | |
5656 | } | |
d46c5b12 KH |
5657 | break; |
5658 | } | |
9864ebce KH |
5659 | if (result == CODING_FINISH_INTERRUPT) |
5660 | { | |
5661 | /* The conversion procedure was interrupted by a user. */ | |
9864ebce KH |
5662 | break; |
5663 | } | |
5664 | /* Now RESULT == CODING_FINISH_INSUFFICIENT_DST */ | |
5665 | if (coding->consumed < 1) | |
5666 | { | |
5667 | /* It's quite strange to require more memory without | |
5668 | consuming any bytes. Perhaps CCL program bug. */ | |
9864ebce KH |
5669 | break; |
5670 | } | |
fb88bf2d KH |
5671 | if (first) |
5672 | { | |
5673 | /* We have just done the first batch of conversion which was | |
8ca3766a | 5674 | stopped because of insufficient gap. Let's reconsider the |
fb88bf2d KH |
5675 | required gap size (i.e. SRT - DST) now. |
5676 | ||
5677 | We have converted ORIG bytes (== coding->consumed) into | |
5678 | NEW bytes (coding->produced). To convert the remaining | |
5679 | LEN bytes, we may need REQUIRE bytes of gap, where: | |
5680 | REQUIRE + LEN_BYTE = LEN_BYTE * (NEW / ORIG) | |
5681 | REQUIRE = LEN_BYTE * (NEW - ORIG) / ORIG | |
5682 | Here, we are sure that NEW >= ORIG. */ | |
b3385c28 KH |
5683 | float ratio; |
5684 | ||
5685 | if (coding->produced <= coding->consumed) | |
5686 | { | |
5687 | /* This happens because of CCL-based coding system with | |
5688 | eol-type CRLF. */ | |
5689 | require = 0; | |
5690 | } | |
5691 | else | |
5692 | { | |
5693 | ratio = (coding->produced - coding->consumed) / coding->consumed; | |
5694 | require = len_byte * ratio; | |
5695 | } | |
fb88bf2d KH |
5696 | first = 0; |
5697 | } | |
5698 | if ((src - dst) < (require + 2000)) | |
5699 | { | |
5700 | /* See the comment above the previous call of make_gap. */ | |
5701 | int add = len_byte + inserted_byte; | |
5702 | ||
5703 | GAP_SIZE -= add; | |
5704 | ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
5705 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5706 | make_gap (require + 2000); | |
5707 | GAP_SIZE += add; | |
5708 | ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
5709 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
fb88bf2d | 5710 | } |
d46c5b12 | 5711 | } |
fb88bf2d KH |
5712 | if (src - dst > 0) *dst = 0; /* Put an anchor. */ |
5713 | ||
b73bfc1c KH |
5714 | if (encodep && coding->dst_multibyte) |
5715 | { | |
5716 | /* The output is unibyte. We must convert 8-bit characters to | |
5717 | multibyte form. */ | |
5718 | if (inserted_byte * 2 > GAP_SIZE) | |
5719 | { | |
5720 | GAP_SIZE -= inserted_byte; | |
5721 | ZV += inserted_byte; Z += inserted_byte; | |
5722 | ZV_BYTE += inserted_byte; Z_BYTE += inserted_byte; | |
5723 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5724 | make_gap (inserted_byte - GAP_SIZE); | |
5725 | GAP_SIZE += inserted_byte; | |
5726 | ZV -= inserted_byte; Z -= inserted_byte; | |
5727 | ZV_BYTE -= inserted_byte; Z_BYTE -= inserted_byte; | |
5728 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
5729 | } | |
5730 | inserted_byte = str_to_multibyte (GPT_ADDR, GAP_SIZE, inserted_byte); | |
5731 | } | |
7553d0e1 | 5732 | |
93dec019 | 5733 | /* If we shrank the conversion area, adjust it now. */ |
12410ef1 KH |
5734 | if (total_skip > 0) |
5735 | { | |
5736 | if (tail_skip > 0) | |
5737 | safe_bcopy (GAP_END_ADDR, GPT_ADDR + inserted_byte, tail_skip); | |
5738 | inserted += total_skip; inserted_byte += total_skip; | |
5739 | GAP_SIZE += total_skip; | |
5740 | GPT -= head_skip; GPT_BYTE -= head_skip; | |
5741 | ZV -= total_skip; ZV_BYTE -= total_skip; | |
5742 | Z -= total_skip; Z_BYTE -= total_skip; | |
5743 | from -= head_skip; from_byte -= head_skip; | |
5744 | to += tail_skip; to_byte += tail_skip; | |
5745 | } | |
5746 | ||
6abb9bd9 | 5747 | prev_Z = Z; |
72d1a715 RS |
5748 | if (! EQ (current_buffer->undo_list, Qt)) |
5749 | adjust_after_replace (from, from_byte, deletion, inserted, inserted_byte); | |
5750 | else | |
5751 | adjust_after_replace_noundo (from, from_byte, nchars_del, nbytes_del, | |
5752 | inserted, inserted_byte); | |
6abb9bd9 | 5753 | inserted = Z - prev_Z; |
4ed46869 | 5754 | |
ec6d2bb8 KH |
5755 | if (!encodep && coding->cmp_data && coding->cmp_data->used) |
5756 | coding_restore_composition (coding, Fcurrent_buffer ()); | |
5757 | coding_free_composition_data (coding); | |
5758 | ||
b73bfc1c KH |
5759 | if (! inhibit_pre_post_conversion |
5760 | && ! encodep && ! NILP (coding->post_read_conversion)) | |
d46c5b12 | 5761 | { |
2b4f9037 | 5762 | Lisp_Object val; |
4ed46869 | 5763 | |
e133c8fa KH |
5764 | if (from != PT) |
5765 | TEMP_SET_PT_BOTH (from, from_byte); | |
6abb9bd9 | 5766 | prev_Z = Z; |
b843d1ae KH |
5767 | record_unwind_protect (code_convert_region_unwind, Qnil); |
5768 | /* We should not call any more pre-write/post-read-conversion | |
5769 | functions while this post-read-conversion is running. */ | |
5770 | inhibit_pre_post_conversion = 1; | |
2b4f9037 | 5771 | val = call1 (coding->post_read_conversion, make_number (inserted)); |
b843d1ae KH |
5772 | inhibit_pre_post_conversion = 0; |
5773 | /* Discard the unwind protect. */ | |
5774 | specpdl_ptr--; | |
b7826503 | 5775 | CHECK_NUMBER (val); |
944bd420 | 5776 | inserted += Z - prev_Z; |
e133c8fa KH |
5777 | } |
5778 | ||
5779 | if (orig_point >= from) | |
5780 | { | |
5781 | if (orig_point >= from + orig_len) | |
5782 | orig_point += inserted - orig_len; | |
5783 | else | |
5784 | orig_point = from; | |
5785 | TEMP_SET_PT (orig_point); | |
d46c5b12 | 5786 | } |
4ed46869 | 5787 | |
ec6d2bb8 KH |
5788 | if (replace) |
5789 | { | |
5790 | signal_after_change (from, to - from, inserted); | |
e19539f1 | 5791 | update_compositions (from, from + inserted, CHECK_BORDER); |
ec6d2bb8 | 5792 | } |
2b4f9037 | 5793 | |
fb88bf2d | 5794 | { |
12410ef1 KH |
5795 | coding->consumed = to_byte - from_byte; |
5796 | coding->consumed_char = to - from; | |
5797 | coding->produced = inserted_byte; | |
5798 | coding->produced_char = inserted; | |
fb88bf2d | 5799 | } |
7553d0e1 | 5800 | |
fb88bf2d | 5801 | return 0; |
d46c5b12 KH |
5802 | } |
5803 | ||
5804 | Lisp_Object | |
b73bfc1c KH |
5805 | run_pre_post_conversion_on_str (str, coding, encodep) |
5806 | Lisp_Object str; | |
5807 | struct coding_system *coding; | |
5808 | int encodep; | |
5809 | { | |
aed13378 | 5810 | int count = SPECPDL_INDEX (); |
cf3b32fc | 5811 | struct gcpro gcpro1, gcpro2; |
b73bfc1c | 5812 | int multibyte = STRING_MULTIBYTE (str); |
3fd9494b RS |
5813 | Lisp_Object buffer; |
5814 | struct buffer *buf; | |
cf3b32fc | 5815 | Lisp_Object old_deactivate_mark; |
b73bfc1c KH |
5816 | |
5817 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
5818 | record_unwind_protect (code_convert_region_unwind, Qnil); | |
cf3b32fc RS |
5819 | /* It is not crucial to specbind this. */ |
5820 | old_deactivate_mark = Vdeactivate_mark; | |
5821 | GCPRO2 (str, old_deactivate_mark); | |
3fd9494b RS |
5822 | |
5823 | buffer = Fget_buffer_create (build_string (" *code-converting-work*")); | |
5824 | buf = XBUFFER (buffer); | |
5825 | ||
5826 | buf->directory = current_buffer->directory; | |
5827 | buf->read_only = Qnil; | |
5828 | buf->filename = Qnil; | |
5829 | buf->undo_list = Qt; | |
5830 | buf->overlays_before = Qnil; | |
5831 | buf->overlays_after = Qnil; | |
5832 | ||
5833 | set_buffer_internal (buf); | |
b73bfc1c KH |
5834 | /* We must insert the contents of STR as is without |
5835 | unibyte<->multibyte conversion. For that, we adjust the | |
5836 | multibyteness of the working buffer to that of STR. */ | |
5837 | Ferase_buffer (); | |
3fd9494b RS |
5838 | buf->enable_multibyte_characters = multibyte ? Qt : Qnil; |
5839 | ||
b73bfc1c | 5840 | insert_from_string (str, 0, 0, |
d5db4077 | 5841 | SCHARS (str), SBYTES (str), 0); |
b73bfc1c KH |
5842 | UNGCPRO; |
5843 | inhibit_pre_post_conversion = 1; | |
5844 | if (encodep) | |
5845 | call2 (coding->pre_write_conversion, make_number (BEG), make_number (Z)); | |
5846 | else | |
6bac5b12 KH |
5847 | { |
5848 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
5849 | call1 (coding->post_read_conversion, make_number (Z - BEG)); | |
5850 | } | |
b73bfc1c | 5851 | inhibit_pre_post_conversion = 0; |
cf3b32fc | 5852 | Vdeactivate_mark = old_deactivate_mark; |
78108bcd | 5853 | str = make_buffer_string (BEG, Z, 1); |
b73bfc1c KH |
5854 | return unbind_to (count, str); |
5855 | } | |
5856 | ||
5857 | Lisp_Object | |
5858 | decode_coding_string (str, coding, nocopy) | |
d46c5b12 | 5859 | Lisp_Object str; |
4ed46869 | 5860 | struct coding_system *coding; |
b73bfc1c | 5861 | int nocopy; |
4ed46869 | 5862 | { |
d46c5b12 | 5863 | int len; |
73be902c | 5864 | struct conversion_buffer buf; |
da55a2b7 | 5865 | int from, to_byte; |
84d60297 | 5866 | Lisp_Object saved_coding_symbol; |
d46c5b12 | 5867 | int result; |
78108bcd | 5868 | int require_decoding; |
73be902c KH |
5869 | int shrinked_bytes = 0; |
5870 | Lisp_Object newstr; | |
2391eaa4 | 5871 | int consumed, consumed_char, produced, produced_char; |
4ed46869 | 5872 | |
b73bfc1c | 5873 | from = 0; |
d5db4077 | 5874 | to_byte = SBYTES (str); |
4ed46869 | 5875 | |
8844fa83 | 5876 | saved_coding_symbol = coding->symbol; |
764ca8da KH |
5877 | coding->src_multibyte = STRING_MULTIBYTE (str); |
5878 | coding->dst_multibyte = 1; | |
b73bfc1c | 5879 | if (CODING_REQUIRE_DETECTION (coding)) |
d46c5b12 KH |
5880 | { |
5881 | /* See the comments in code_convert_region. */ | |
5882 | if (coding->type == coding_type_undecided) | |
5883 | { | |
d5db4077 | 5884 | detect_coding (coding, SDATA (str), to_byte); |
d46c5b12 | 5885 | if (coding->type == coding_type_undecided) |
d280ccb6 KH |
5886 | { |
5887 | coding->type = coding_type_emacs_mule; | |
5888 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
5889 | /* As emacs-mule decoder will handle composition, we | |
5890 | need this setting to allocate coding->cmp_data | |
5891 | later. */ | |
5892 | coding->composing = COMPOSITION_NO; | |
5893 | } | |
d46c5b12 | 5894 | } |
aaaf0b1e KH |
5895 | if (coding->eol_type == CODING_EOL_UNDECIDED |
5896 | && coding->type != coding_type_ccl) | |
d46c5b12 KH |
5897 | { |
5898 | saved_coding_symbol = coding->symbol; | |
d5db4077 | 5899 | detect_eol (coding, SDATA (str), to_byte); |
d46c5b12 KH |
5900 | if (coding->eol_type == CODING_EOL_UNDECIDED) |
5901 | coding->eol_type = CODING_EOL_LF; | |
5902 | /* We had better recover the original eol format if we | |
8ca3766a | 5903 | encounter an inconsistent eol format while decoding. */ |
d46c5b12 KH |
5904 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
5905 | } | |
5906 | } | |
4ed46869 | 5907 | |
764ca8da KH |
5908 | if (coding->type == coding_type_no_conversion |
5909 | || coding->type == coding_type_raw_text) | |
5910 | coding->dst_multibyte = 0; | |
5911 | ||
78108bcd | 5912 | require_decoding = CODING_REQUIRE_DECODING (coding); |
ec6d2bb8 | 5913 | |
b73bfc1c | 5914 | if (STRING_MULTIBYTE (str)) |
d46c5b12 | 5915 | { |
b73bfc1c KH |
5916 | /* Decoding routines expect the source text to be unibyte. */ |
5917 | str = Fstring_as_unibyte (str); | |
d5db4077 | 5918 | to_byte = SBYTES (str); |
b73bfc1c | 5919 | nocopy = 1; |
764ca8da | 5920 | coding->src_multibyte = 0; |
b73bfc1c | 5921 | } |
ec6d2bb8 | 5922 | |
b73bfc1c | 5923 | /* Try to skip the heading and tailing ASCIIs. */ |
78108bcd | 5924 | if (require_decoding && coding->type != coding_type_ccl) |
4956c225 | 5925 | { |
d5db4077 | 5926 | SHRINK_CONVERSION_REGION (&from, &to_byte, coding, SDATA (str), |
4956c225 KH |
5927 | 0); |
5928 | if (from == to_byte) | |
78108bcd | 5929 | require_decoding = 0; |
d5db4077 | 5930 | shrinked_bytes = from + (SBYTES (str) - to_byte); |
4956c225 | 5931 | } |
b73bfc1c | 5932 | |
78108bcd KH |
5933 | if (!require_decoding) |
5934 | { | |
d5db4077 KR |
5935 | coding->consumed = SBYTES (str); |
5936 | coding->consumed_char = SCHARS (str); | |
78108bcd KH |
5937 | if (coding->dst_multibyte) |
5938 | { | |
5939 | str = Fstring_as_multibyte (str); | |
5940 | nocopy = 1; | |
5941 | } | |
d5db4077 KR |
5942 | coding->produced = SBYTES (str); |
5943 | coding->produced_char = SCHARS (str); | |
78108bcd KH |
5944 | return (nocopy ? str : Fcopy_sequence (str)); |
5945 | } | |
5946 | ||
5947 | if (coding->composing != COMPOSITION_DISABLED) | |
5948 | coding_allocate_composition_data (coding, from); | |
b73bfc1c | 5949 | len = decoding_buffer_size (coding, to_byte - from); |
73be902c | 5950 | allocate_conversion_buffer (buf, len); |
4ed46869 | 5951 | |
2391eaa4 | 5952 | consumed = consumed_char = produced = produced_char = 0; |
73be902c | 5953 | while (1) |
4ed46869 | 5954 | { |
d5db4077 | 5955 | result = decode_coding (coding, SDATA (str) + from + consumed, |
73be902c KH |
5956 | buf.data + produced, to_byte - from - consumed, |
5957 | buf.size - produced); | |
5958 | consumed += coding->consumed; | |
2391eaa4 | 5959 | consumed_char += coding->consumed_char; |
73be902c KH |
5960 | produced += coding->produced; |
5961 | produced_char += coding->produced_char; | |
2391eaa4 KH |
5962 | if (result == CODING_FINISH_NORMAL |
5963 | || (result == CODING_FINISH_INSUFFICIENT_SRC | |
5964 | && coding->consumed == 0)) | |
73be902c KH |
5965 | break; |
5966 | if (result == CODING_FINISH_INSUFFICIENT_CMP) | |
5967 | coding_allocate_composition_data (coding, from + produced_char); | |
5968 | else if (result == CODING_FINISH_INSUFFICIENT_DST) | |
5969 | extend_conversion_buffer (&buf); | |
5970 | else if (result == CODING_FINISH_INCONSISTENT_EOL) | |
5971 | { | |
8844fa83 KH |
5972 | Lisp_Object eol_type; |
5973 | ||
73be902c KH |
5974 | /* Recover the original EOL format. */ |
5975 | if (coding->eol_type == CODING_EOL_CR) | |
5976 | { | |
5977 | unsigned char *p; | |
5978 | for (p = buf.data; p < buf.data + produced; p++) | |
5979 | if (*p == '\n') *p = '\r'; | |
5980 | } | |
5981 | else if (coding->eol_type == CODING_EOL_CRLF) | |
5982 | { | |
5983 | int num_eol = 0; | |
5984 | unsigned char *p0, *p1; | |
5985 | for (p0 = buf.data, p1 = p0 + produced; p0 < p1; p0++) | |
5986 | if (*p0 == '\n') num_eol++; | |
5987 | if (produced + num_eol >= buf.size) | |
5988 | extend_conversion_buffer (&buf); | |
5989 | for (p0 = buf.data + produced, p1 = p0 + num_eol; p0 > buf.data;) | |
5990 | { | |
5991 | *--p1 = *--p0; | |
5992 | if (*p0 == '\n') *--p1 = '\r'; | |
5993 | } | |
5994 | produced += num_eol; | |
5995 | produced_char += num_eol; | |
93dec019 | 5996 | } |
8844fa83 | 5997 | /* Suppress eol-format conversion in the further conversion. */ |
73be902c | 5998 | coding->eol_type = CODING_EOL_LF; |
8844fa83 KH |
5999 | |
6000 | /* Set the coding system symbol to that for Unix-like EOL. */ | |
6001 | eol_type = Fget (saved_coding_symbol, Qeol_type); | |
6002 | if (VECTORP (eol_type) | |
6003 | && XVECTOR (eol_type)->size == 3 | |
6004 | && SYMBOLP (XVECTOR (eol_type)->contents[CODING_EOL_LF])) | |
6005 | coding->symbol = XVECTOR (eol_type)->contents[CODING_EOL_LF]; | |
6006 | else | |
6007 | coding->symbol = saved_coding_symbol; | |
6008 | ||
6009 | ||
73be902c | 6010 | } |
4ed46869 | 6011 | } |
d46c5b12 | 6012 | |
2391eaa4 KH |
6013 | coding->consumed = consumed; |
6014 | coding->consumed_char = consumed_char; | |
6015 | coding->produced = produced; | |
6016 | coding->produced_char = produced_char; | |
6017 | ||
78108bcd | 6018 | if (coding->dst_multibyte) |
73be902c KH |
6019 | newstr = make_uninit_multibyte_string (produced_char + shrinked_bytes, |
6020 | produced + shrinked_bytes); | |
78108bcd | 6021 | else |
73be902c KH |
6022 | newstr = make_uninit_string (produced + shrinked_bytes); |
6023 | if (from > 0) | |
a4244313 KR |
6024 | STRING_COPYIN (newstr, 0, SDATA (str), from); |
6025 | STRING_COPYIN (newstr, from, buf.data, produced); | |
73be902c | 6026 | if (shrinked_bytes > from) |
a4244313 KR |
6027 | STRING_COPYIN (newstr, from + produced, |
6028 | SDATA (str) + to_byte, | |
6029 | shrinked_bytes - from); | |
73be902c | 6030 | free_conversion_buffer (&buf); |
b73bfc1c KH |
6031 | |
6032 | if (coding->cmp_data && coding->cmp_data->used) | |
73be902c | 6033 | coding_restore_composition (coding, newstr); |
b73bfc1c KH |
6034 | coding_free_composition_data (coding); |
6035 | ||
6036 | if (SYMBOLP (coding->post_read_conversion) | |
6037 | && !NILP (Ffboundp (coding->post_read_conversion))) | |
73be902c | 6038 | newstr = run_pre_post_conversion_on_str (newstr, coding, 0); |
b73bfc1c | 6039 | |
73be902c | 6040 | return newstr; |
b73bfc1c KH |
6041 | } |
6042 | ||
6043 | Lisp_Object | |
6044 | encode_coding_string (str, coding, nocopy) | |
6045 | Lisp_Object str; | |
6046 | struct coding_system *coding; | |
6047 | int nocopy; | |
6048 | { | |
6049 | int len; | |
73be902c | 6050 | struct conversion_buffer buf; |
b73bfc1c | 6051 | int from, to, to_byte; |
b73bfc1c | 6052 | int result; |
73be902c KH |
6053 | int shrinked_bytes = 0; |
6054 | Lisp_Object newstr; | |
2391eaa4 | 6055 | int consumed, consumed_char, produced, produced_char; |
b73bfc1c KH |
6056 | |
6057 | if (SYMBOLP (coding->pre_write_conversion) | |
6058 | && !NILP (Ffboundp (coding->pre_write_conversion))) | |
6bac5b12 | 6059 | str = run_pre_post_conversion_on_str (str, coding, 1); |
b73bfc1c KH |
6060 | |
6061 | from = 0; | |
d5db4077 KR |
6062 | to = SCHARS (str); |
6063 | to_byte = SBYTES (str); | |
b73bfc1c | 6064 | |
e2c06b17 KH |
6065 | /* Encoding routines determine the multibyteness of the source text |
6066 | by coding->src_multibyte. */ | |
6067 | coding->src_multibyte = STRING_MULTIBYTE (str); | |
6068 | coding->dst_multibyte = 0; | |
b73bfc1c | 6069 | if (! CODING_REQUIRE_ENCODING (coding)) |
826bfb8b | 6070 | { |
d5db4077 KR |
6071 | coding->consumed = SBYTES (str); |
6072 | coding->consumed_char = SCHARS (str); | |
b73bfc1c KH |
6073 | if (STRING_MULTIBYTE (str)) |
6074 | { | |
6075 | str = Fstring_as_unibyte (str); | |
6076 | nocopy = 1; | |
6077 | } | |
d5db4077 KR |
6078 | coding->produced = SBYTES (str); |
6079 | coding->produced_char = SCHARS (str); | |
b73bfc1c | 6080 | return (nocopy ? str : Fcopy_sequence (str)); |
826bfb8b KH |
6081 | } |
6082 | ||
b73bfc1c KH |
6083 | if (coding->composing != COMPOSITION_DISABLED) |
6084 | coding_save_composition (coding, from, to, str); | |
ec6d2bb8 | 6085 | |
b73bfc1c | 6086 | /* Try to skip the heading and tailing ASCIIs. */ |
4956c225 KH |
6087 | if (coding->type != coding_type_ccl) |
6088 | { | |
d5db4077 | 6089 | SHRINK_CONVERSION_REGION (&from, &to_byte, coding, SDATA (str), |
4956c225 KH |
6090 | 1); |
6091 | if (from == to_byte) | |
6092 | return (nocopy ? str : Fcopy_sequence (str)); | |
d5db4077 | 6093 | shrinked_bytes = from + (SBYTES (str) - to_byte); |
4956c225 | 6094 | } |
b73bfc1c KH |
6095 | |
6096 | len = encoding_buffer_size (coding, to_byte - from); | |
73be902c KH |
6097 | allocate_conversion_buffer (buf, len); |
6098 | ||
2391eaa4 | 6099 | consumed = consumed_char = produced = produced_char = 0; |
73be902c KH |
6100 | while (1) |
6101 | { | |
d5db4077 | 6102 | result = encode_coding (coding, SDATA (str) + from + consumed, |
73be902c KH |
6103 | buf.data + produced, to_byte - from - consumed, |
6104 | buf.size - produced); | |
6105 | consumed += coding->consumed; | |
2391eaa4 | 6106 | consumed_char += coding->consumed_char; |
13004bef | 6107 | produced += coding->produced; |
2391eaa4 KH |
6108 | produced_char += coding->produced_char; |
6109 | if (result == CODING_FINISH_NORMAL | |
6110 | || (result == CODING_FINISH_INSUFFICIENT_SRC | |
6111 | && coding->consumed == 0)) | |
73be902c KH |
6112 | break; |
6113 | /* Now result should be CODING_FINISH_INSUFFICIENT_DST. */ | |
6114 | extend_conversion_buffer (&buf); | |
6115 | } | |
6116 | ||
2391eaa4 KH |
6117 | coding->consumed = consumed; |
6118 | coding->consumed_char = consumed_char; | |
6119 | coding->produced = produced; | |
6120 | coding->produced_char = produced_char; | |
6121 | ||
73be902c | 6122 | newstr = make_uninit_string (produced + shrinked_bytes); |
b73bfc1c | 6123 | if (from > 0) |
a4244313 KR |
6124 | STRING_COPYIN (newstr, 0, SDATA (str), from); |
6125 | STRING_COPYIN (newstr, from, buf.data, produced); | |
73be902c | 6126 | if (shrinked_bytes > from) |
a4244313 KR |
6127 | STRING_COPYIN (newstr, from + produced, |
6128 | SDATA (str) + to_byte, | |
6129 | shrinked_bytes - from); | |
73be902c KH |
6130 | |
6131 | free_conversion_buffer (&buf); | |
ec6d2bb8 | 6132 | coding_free_composition_data (coding); |
b73bfc1c | 6133 | |
73be902c | 6134 | return newstr; |
4ed46869 KH |
6135 | } |
6136 | ||
6137 | \f | |
6138 | #ifdef emacs | |
1397dc18 | 6139 | /*** 8. Emacs Lisp library functions ***/ |
4ed46869 | 6140 | |
4ed46869 | 6141 | DEFUN ("coding-system-p", Fcoding_system_p, Scoding_system_p, 1, 1, 0, |
48b0f3ae PJ |
6142 | doc: /* Return t if OBJECT is nil or a coding-system. |
6143 | See the documentation of `make-coding-system' for information | |
6144 | about coding-system objects. */) | |
6145 | (obj) | |
4ed46869 KH |
6146 | Lisp_Object obj; |
6147 | { | |
4608c386 KH |
6148 | if (NILP (obj)) |
6149 | return Qt; | |
6150 | if (!SYMBOLP (obj)) | |
6151 | return Qnil; | |
6152 | /* Get coding-spec vector for OBJ. */ | |
6153 | obj = Fget (obj, Qcoding_system); | |
6154 | return ((VECTORP (obj) && XVECTOR (obj)->size == 5) | |
6155 | ? Qt : Qnil); | |
4ed46869 KH |
6156 | } |
6157 | ||
9d991de8 RS |
6158 | DEFUN ("read-non-nil-coding-system", Fread_non_nil_coding_system, |
6159 | Sread_non_nil_coding_system, 1, 1, 0, | |
48b0f3ae PJ |
6160 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. */) |
6161 | (prompt) | |
4ed46869 KH |
6162 | Lisp_Object prompt; |
6163 | { | |
e0e989f6 | 6164 | Lisp_Object val; |
9d991de8 RS |
6165 | do |
6166 | { | |
4608c386 KH |
6167 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
6168 | Qt, Qnil, Qcoding_system_history, Qnil, Qnil); | |
9d991de8 | 6169 | } |
d5db4077 | 6170 | while (SCHARS (val) == 0); |
e0e989f6 | 6171 | return (Fintern (val, Qnil)); |
4ed46869 KH |
6172 | } |
6173 | ||
9b787f3e | 6174 | DEFUN ("read-coding-system", Fread_coding_system, Sread_coding_system, 1, 2, 0, |
48b0f3ae PJ |
6175 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. |
6176 | If the user enters null input, return second argument DEFAULT-CODING-SYSTEM. */) | |
6177 | (prompt, default_coding_system) | |
9b787f3e | 6178 | Lisp_Object prompt, default_coding_system; |
4ed46869 | 6179 | { |
f44d27ce | 6180 | Lisp_Object val; |
9b787f3e | 6181 | if (SYMBOLP (default_coding_system)) |
57d25e6f | 6182 | default_coding_system = SYMBOL_NAME (default_coding_system); |
4608c386 | 6183 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
9b787f3e RS |
6184 | Qt, Qnil, Qcoding_system_history, |
6185 | default_coding_system, Qnil); | |
d5db4077 | 6186 | return (SCHARS (val) == 0 ? Qnil : Fintern (val, Qnil)); |
4ed46869 KH |
6187 | } |
6188 | ||
6189 | DEFUN ("check-coding-system", Fcheck_coding_system, Scheck_coding_system, | |
6190 | 1, 1, 0, | |
48b0f3ae PJ |
6191 | doc: /* Check validity of CODING-SYSTEM. |
6192 | If valid, return CODING-SYSTEM, else signal a `coding-system-error' error. | |
6193 | It is valid if it is a symbol with a non-nil `coding-system' property. | |
6194 | The value of property should be a vector of length 5. */) | |
6195 | (coding_system) | |
4ed46869 KH |
6196 | Lisp_Object coding_system; |
6197 | { | |
b7826503 | 6198 | CHECK_SYMBOL (coding_system); |
4ed46869 KH |
6199 | if (!NILP (Fcoding_system_p (coding_system))) |
6200 | return coding_system; | |
6201 | while (1) | |
02ba4723 | 6202 | Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil)); |
4ed46869 | 6203 | } |
3a73fa5d | 6204 | \f |
d46c5b12 | 6205 | Lisp_Object |
0a28aafb | 6206 | detect_coding_system (src, src_bytes, highest, multibytep) |
a4244313 | 6207 | const unsigned char *src; |
d46c5b12 | 6208 | int src_bytes, highest; |
0a28aafb | 6209 | int multibytep; |
4ed46869 KH |
6210 | { |
6211 | int coding_mask, eol_type; | |
d46c5b12 KH |
6212 | Lisp_Object val, tmp; |
6213 | int dummy; | |
4ed46869 | 6214 | |
0a28aafb | 6215 | coding_mask = detect_coding_mask (src, src_bytes, NULL, &dummy, multibytep); |
d46c5b12 KH |
6216 | eol_type = detect_eol_type (src, src_bytes, &dummy); |
6217 | if (eol_type == CODING_EOL_INCONSISTENT) | |
25b02698 | 6218 | eol_type = CODING_EOL_UNDECIDED; |
4ed46869 | 6219 | |
d46c5b12 | 6220 | if (!coding_mask) |
4ed46869 | 6221 | { |
27901516 | 6222 | val = Qundecided; |
d46c5b12 | 6223 | if (eol_type != CODING_EOL_UNDECIDED) |
4ed46869 | 6224 | { |
f44d27ce RS |
6225 | Lisp_Object val2; |
6226 | val2 = Fget (Qundecided, Qeol_type); | |
4ed46869 KH |
6227 | if (VECTORP (val2)) |
6228 | val = XVECTOR (val2)->contents[eol_type]; | |
6229 | } | |
80e803b4 | 6230 | return (highest ? val : Fcons (val, Qnil)); |
4ed46869 | 6231 | } |
4ed46869 | 6232 | |
d46c5b12 KH |
6233 | /* At first, gather possible coding systems in VAL. */ |
6234 | val = Qnil; | |
fa42c37f | 6235 | for (tmp = Vcoding_category_list; CONSP (tmp); tmp = XCDR (tmp)) |
4ed46869 | 6236 | { |
fa42c37f KH |
6237 | Lisp_Object category_val, category_index; |
6238 | ||
6239 | category_index = Fget (XCAR (tmp), Qcoding_category_index); | |
6240 | category_val = Fsymbol_value (XCAR (tmp)); | |
6241 | if (!NILP (category_val) | |
6242 | && NATNUMP (category_index) | |
6243 | && (coding_mask & (1 << XFASTINT (category_index)))) | |
4ed46869 | 6244 | { |
fa42c37f | 6245 | val = Fcons (category_val, val); |
d46c5b12 KH |
6246 | if (highest) |
6247 | break; | |
4ed46869 KH |
6248 | } |
6249 | } | |
d46c5b12 KH |
6250 | if (!highest) |
6251 | val = Fnreverse (val); | |
4ed46869 | 6252 | |
65059037 | 6253 | /* Then, replace the elements with subsidiary coding systems. */ |
fa42c37f | 6254 | for (tmp = val; CONSP (tmp); tmp = XCDR (tmp)) |
4ed46869 | 6255 | { |
65059037 RS |
6256 | if (eol_type != CODING_EOL_UNDECIDED |
6257 | && eol_type != CODING_EOL_INCONSISTENT) | |
4ed46869 | 6258 | { |
d46c5b12 | 6259 | Lisp_Object eol; |
03699b14 | 6260 | eol = Fget (XCAR (tmp), Qeol_type); |
d46c5b12 | 6261 | if (VECTORP (eol)) |
f3fbd155 | 6262 | XSETCAR (tmp, XVECTOR (eol)->contents[eol_type]); |
4ed46869 KH |
6263 | } |
6264 | } | |
03699b14 | 6265 | return (highest ? XCAR (val) : val); |
93dec019 | 6266 | } |
4ed46869 | 6267 | |
d46c5b12 KH |
6268 | DEFUN ("detect-coding-region", Fdetect_coding_region, Sdetect_coding_region, |
6269 | 2, 3, 0, | |
48b0f3ae PJ |
6270 | doc: /* Detect coding system of the text in the region between START and END. |
6271 | Return a list of possible coding systems ordered by priority. | |
6272 | ||
6273 | If only ASCII characters are found, it returns a list of single element | |
6274 | `undecided' or its subsidiary coding system according to a detected | |
6275 | end-of-line format. | |
6276 | ||
6277 | If optional argument HIGHEST is non-nil, return the coding system of | |
6278 | highest priority. */) | |
6279 | (start, end, highest) | |
d46c5b12 KH |
6280 | Lisp_Object start, end, highest; |
6281 | { | |
6282 | int from, to; | |
6283 | int from_byte, to_byte; | |
682169fe | 6284 | int include_anchor_byte = 0; |
6289dd10 | 6285 | |
b7826503 PJ |
6286 | CHECK_NUMBER_COERCE_MARKER (start); |
6287 | CHECK_NUMBER_COERCE_MARKER (end); | |
4ed46869 | 6288 | |
d46c5b12 KH |
6289 | validate_region (&start, &end); |
6290 | from = XINT (start), to = XINT (end); | |
6291 | from_byte = CHAR_TO_BYTE (from); | |
6292 | to_byte = CHAR_TO_BYTE (to); | |
6289dd10 | 6293 | |
d46c5b12 KH |
6294 | if (from < GPT && to >= GPT) |
6295 | move_gap_both (to, to_byte); | |
c210f766 KH |
6296 | /* If we an anchor byte `\0' follows the region, we include it in |
6297 | the detecting source. Then code detectors can handle the tailing | |
6298 | byte sequence more accurately. | |
6299 | ||
7d0393cf | 6300 | Fix me: This is not a perfect solution. It is better that we |
c210f766 KH |
6301 | add one more argument, say LAST_BLOCK, to all detect_coding_XXX. |
6302 | */ | |
682169fe KH |
6303 | if (to == Z || (to == GPT && GAP_SIZE > 0)) |
6304 | include_anchor_byte = 1; | |
d46c5b12 | 6305 | return detect_coding_system (BYTE_POS_ADDR (from_byte), |
682169fe | 6306 | to_byte - from_byte + include_anchor_byte, |
0a28aafb KH |
6307 | !NILP (highest), |
6308 | !NILP (current_buffer | |
6309 | ->enable_multibyte_characters)); | |
d46c5b12 | 6310 | } |
6289dd10 | 6311 | |
d46c5b12 KH |
6312 | DEFUN ("detect-coding-string", Fdetect_coding_string, Sdetect_coding_string, |
6313 | 1, 2, 0, | |
48b0f3ae PJ |
6314 | doc: /* Detect coding system of the text in STRING. |
6315 | Return a list of possible coding systems ordered by priority. | |
6316 | ||
6317 | If only ASCII characters are found, it returns a list of single element | |
6318 | `undecided' or its subsidiary coding system according to a detected | |
6319 | end-of-line format. | |
6320 | ||
6321 | If optional argument HIGHEST is non-nil, return the coding system of | |
6322 | highest priority. */) | |
6323 | (string, highest) | |
d46c5b12 KH |
6324 | Lisp_Object string, highest; |
6325 | { | |
b7826503 | 6326 | CHECK_STRING (string); |
4ed46869 | 6327 | |
d5db4077 | 6328 | return detect_coding_system (SDATA (string), |
682169fe KH |
6329 | /* "+ 1" is to include the anchor byte |
6330 | `\0'. With this, code detectors can | |
c210f766 KH |
6331 | handle the tailing bytes more |
6332 | accurately. */ | |
d5db4077 | 6333 | SBYTES (string) + 1, |
0a28aafb KH |
6334 | !NILP (highest), |
6335 | STRING_MULTIBYTE (string)); | |
4ed46869 KH |
6336 | } |
6337 | ||
05e6f5dc KH |
6338 | /* Return an intersection of lists L1 and L2. */ |
6339 | ||
6340 | static Lisp_Object | |
6341 | intersection (l1, l2) | |
6342 | Lisp_Object l1, l2; | |
6343 | { | |
eef762fc | 6344 | Lisp_Object val = Fcons (Qnil, Qnil), tail; |
05e6f5dc | 6345 | |
eef762fc | 6346 | for (tail = val; CONSP (l1); l1 = XCDR (l1)) |
05e6f5dc KH |
6347 | { |
6348 | if (!NILP (Fmemq (XCAR (l1), l2))) | |
eef762fc AS |
6349 | { |
6350 | XSETCDR (tail, Fcons (XCAR (l1), Qnil)); | |
6351 | tail = XCDR (tail); | |
6352 | } | |
05e6f5dc | 6353 | } |
eef762fc | 6354 | return XCDR (val); |
05e6f5dc KH |
6355 | } |
6356 | ||
6357 | ||
6358 | /* Subroutine for Fsafe_coding_systems_region_internal. | |
6359 | ||
6360 | Return a list of coding systems that safely encode the multibyte | |
6361 | text between P and PEND. SAFE_CODINGS, if non-nil, is a list of | |
6362 | possible coding systems. If it is nil, it means that we have not | |
6363 | yet found any coding systems. | |
6364 | ||
6365 | WORK_TABLE is a copy of the char-table Vchar_coding_system_table. An | |
6366 | element of WORK_TABLE is set to t once the element is looked up. | |
6367 | ||
6368 | If a non-ASCII single byte char is found, set | |
6369 | *single_byte_char_found to 1. */ | |
6370 | ||
6371 | static Lisp_Object | |
6372 | find_safe_codings (p, pend, safe_codings, work_table, single_byte_char_found) | |
6373 | unsigned char *p, *pend; | |
6374 | Lisp_Object safe_codings, work_table; | |
6375 | int *single_byte_char_found; | |
6376 | { | |
6377 | int c, len, idx; | |
6378 | Lisp_Object val; | |
6379 | ||
6380 | while (p < pend) | |
6381 | { | |
6382 | c = STRING_CHAR_AND_LENGTH (p, pend - p, len); | |
6383 | p += len; | |
6384 | if (ASCII_BYTE_P (c)) | |
6385 | /* We can ignore ASCII characters here. */ | |
6386 | continue; | |
6387 | if (SINGLE_BYTE_CHAR_P (c)) | |
6388 | *single_byte_char_found = 1; | |
6389 | if (NILP (safe_codings)) | |
6390 | continue; | |
6391 | /* Check the safe coding systems for C. */ | |
6392 | val = char_table_ref_and_index (work_table, c, &idx); | |
6393 | if (EQ (val, Qt)) | |
6394 | /* This element was already checked. Ignore it. */ | |
6395 | continue; | |
6396 | /* Remember that we checked this element. */ | |
975f250a | 6397 | CHAR_TABLE_SET (work_table, make_number (idx), Qt); |
05e6f5dc KH |
6398 | |
6399 | /* If there are some safe coding systems for C and we have | |
6400 | already found the other set of coding systems for the | |
6401 | different characters, get the intersection of them. */ | |
6402 | if (!EQ (safe_codings, Qt) && !NILP (val)) | |
6403 | val = intersection (safe_codings, val); | |
6404 | safe_codings = val; | |
6405 | } | |
6406 | return safe_codings; | |
6407 | } | |
6408 | ||
6409 | ||
6410 | /* Return a list of coding systems that safely encode the text between | |
6411 | START and END. If the text contains only ASCII or is unibyte, | |
6412 | return t. */ | |
6413 | ||
6414 | DEFUN ("find-coding-systems-region-internal", | |
6415 | Ffind_coding_systems_region_internal, | |
6416 | Sfind_coding_systems_region_internal, 2, 2, 0, | |
48b0f3ae PJ |
6417 | doc: /* Internal use only. */) |
6418 | (start, end) | |
05e6f5dc KH |
6419 | Lisp_Object start, end; |
6420 | { | |
6421 | Lisp_Object work_table, safe_codings; | |
6422 | int non_ascii_p = 0; | |
6423 | int single_byte_char_found = 0; | |
a90f2c35 | 6424 | const unsigned char *p1, *p1end, *p2, *p2end, *p; |
05e6f5dc KH |
6425 | |
6426 | if (STRINGP (start)) | |
6427 | { | |
6428 | if (!STRING_MULTIBYTE (start)) | |
6429 | return Qt; | |
d5db4077 | 6430 | p1 = SDATA (start), p1end = p1 + SBYTES (start); |
05e6f5dc | 6431 | p2 = p2end = p1end; |
d5db4077 | 6432 | if (SCHARS (start) != SBYTES (start)) |
05e6f5dc KH |
6433 | non_ascii_p = 1; |
6434 | } | |
6435 | else | |
6436 | { | |
6437 | int from, to, stop; | |
6438 | ||
b7826503 PJ |
6439 | CHECK_NUMBER_COERCE_MARKER (start); |
6440 | CHECK_NUMBER_COERCE_MARKER (end); | |
05e6f5dc KH |
6441 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) |
6442 | args_out_of_range (start, end); | |
6443 | if (NILP (current_buffer->enable_multibyte_characters)) | |
6444 | return Qt; | |
6445 | from = CHAR_TO_BYTE (XINT (start)); | |
6446 | to = CHAR_TO_BYTE (XINT (end)); | |
6447 | stop = from < GPT_BYTE && GPT_BYTE < to ? GPT_BYTE : to; | |
6448 | p1 = BYTE_POS_ADDR (from), p1end = p1 + (stop - from); | |
6449 | if (stop == to) | |
6450 | p2 = p2end = p1end; | |
6451 | else | |
6452 | p2 = BYTE_POS_ADDR (stop), p2end = p2 + (to - stop); | |
6453 | if (XINT (end) - XINT (start) != to - from) | |
6454 | non_ascii_p = 1; | |
6455 | } | |
6456 | ||
6457 | if (!non_ascii_p) | |
6458 | { | |
6459 | /* We are sure that the text contains no multibyte character. | |
6460 | Check if it contains eight-bit-graphic. */ | |
6461 | p = p1; | |
6462 | for (p = p1; p < p1end && ASCII_BYTE_P (*p); p++); | |
6463 | if (p == p1end) | |
6464 | { | |
93dec019 | 6465 | for (p = p2; p < p2end && ASCII_BYTE_P (*p); p++); |
05e6f5dc KH |
6466 | if (p == p2end) |
6467 | return Qt; | |
6468 | } | |
6469 | } | |
6470 | ||
6471 | /* The text contains non-ASCII characters. */ | |
6472 | work_table = Fcopy_sequence (Vchar_coding_system_table); | |
6473 | safe_codings = find_safe_codings (p1, p1end, Qt, work_table, | |
6474 | &single_byte_char_found); | |
6475 | if (p2 < p2end) | |
6476 | safe_codings = find_safe_codings (p2, p2end, safe_codings, work_table, | |
6477 | &single_byte_char_found); | |
6478 | ||
176c92e6 SM |
6479 | if (EQ (safe_codings, Qt)) |
6480 | ; /* Nothing to be done. */ | |
6481 | else if (!single_byte_char_found) | |
05e6f5dc KH |
6482 | { |
6483 | /* Append generic coding systems. */ | |
6484 | Lisp_Object args[2]; | |
6485 | args[0] = safe_codings; | |
6486 | args[1] = Fchar_table_extra_slot (Vchar_coding_system_table, | |
6487 | make_number (0)); | |
975f250a | 6488 | safe_codings = Fappend (2, args); |
05e6f5dc KH |
6489 | } |
6490 | else | |
109a5acb KH |
6491 | safe_codings = Fcons (Qraw_text, |
6492 | Fcons (Qemacs_mule, | |
6493 | Fcons (Qno_conversion, safe_codings))); | |
05e6f5dc KH |
6494 | return safe_codings; |
6495 | } | |
6496 | ||
6497 | ||
068a9dbd KH |
6498 | /* Search from position POS for such characters that are unencodable |
6499 | accoding to SAFE_CHARS, and return a list of their positions. P | |
6500 | points where in the memory the character at POS exists. Limit the | |
6501 | search at PEND or when Nth unencodable characters are found. | |
6502 | ||
6503 | If SAFE_CHARS is a char table, an element for an unencodable | |
6504 | character is nil. | |
6505 | ||
6506 | If SAFE_CHARS is nil, all non-ASCII characters are unencodable. | |
6507 | ||
6508 | Otherwise, SAFE_CHARS is t, and only eight-bit-contrl and | |
6509 | eight-bit-graphic characters are unencodable. */ | |
6510 | ||
6511 | static Lisp_Object | |
6512 | unencodable_char_position (safe_chars, pos, p, pend, n) | |
6513 | Lisp_Object safe_chars; | |
6514 | int pos; | |
6515 | unsigned char *p, *pend; | |
6516 | int n; | |
6517 | { | |
6518 | Lisp_Object pos_list; | |
6519 | ||
6520 | pos_list = Qnil; | |
6521 | while (p < pend) | |
6522 | { | |
6523 | int len; | |
6524 | int c = STRING_CHAR_AND_LENGTH (p, MAX_MULTIBYTE_LENGTH, len); | |
7d0393cf | 6525 | |
068a9dbd KH |
6526 | if (c >= 128 |
6527 | && (CHAR_TABLE_P (safe_chars) | |
6528 | ? NILP (CHAR_TABLE_REF (safe_chars, c)) | |
6529 | : (NILP (safe_chars) || c < 256))) | |
6530 | { | |
6531 | pos_list = Fcons (make_number (pos), pos_list); | |
6532 | if (--n <= 0) | |
6533 | break; | |
6534 | } | |
6535 | pos++; | |
6536 | p += len; | |
6537 | } | |
6538 | return Fnreverse (pos_list); | |
6539 | } | |
6540 | ||
6541 | ||
6542 | DEFUN ("unencodable-char-position", Funencodable_char_position, | |
6543 | Sunencodable_char_position, 3, 5, 0, | |
6544 | doc: /* | |
6545 | Return position of first un-encodable character in a region. | |
6546 | START and END specfiy the region and CODING-SYSTEM specifies the | |
6547 | encoding to check. Return nil if CODING-SYSTEM does encode the region. | |
6548 | ||
6549 | If optional 4th argument COUNT is non-nil, it specifies at most how | |
6550 | many un-encodable characters to search. In this case, the value is a | |
6551 | list of positions. | |
6552 | ||
6553 | If optional 5th argument STRING is non-nil, it is a string to search | |
6554 | for un-encodable characters. In that case, START and END are indexes | |
6555 | to the string. */) | |
6556 | (start, end, coding_system, count, string) | |
6557 | Lisp_Object start, end, coding_system, count, string; | |
6558 | { | |
6559 | int n; | |
6560 | Lisp_Object safe_chars; | |
6561 | struct coding_system coding; | |
6562 | Lisp_Object positions; | |
6563 | int from, to; | |
6564 | unsigned char *p, *pend; | |
6565 | ||
6566 | if (NILP (string)) | |
6567 | { | |
6568 | validate_region (&start, &end); | |
6569 | from = XINT (start); | |
6570 | to = XINT (end); | |
6571 | if (NILP (current_buffer->enable_multibyte_characters)) | |
6572 | return Qnil; | |
6573 | p = CHAR_POS_ADDR (from); | |
200c93e2 KH |
6574 | if (to == GPT) |
6575 | pend = GPT_ADDR; | |
6576 | else | |
6577 | pend = CHAR_POS_ADDR (to); | |
068a9dbd KH |
6578 | } |
6579 | else | |
6580 | { | |
6581 | CHECK_STRING (string); | |
6582 | CHECK_NATNUM (start); | |
6583 | CHECK_NATNUM (end); | |
6584 | from = XINT (start); | |
6585 | to = XINT (end); | |
6586 | if (from > to | |
6587 | || to > SCHARS (string)) | |
6588 | args_out_of_range_3 (string, start, end); | |
6589 | if (! STRING_MULTIBYTE (string)) | |
6590 | return Qnil; | |
6591 | p = SDATA (string) + string_char_to_byte (string, from); | |
6592 | pend = SDATA (string) + string_char_to_byte (string, to); | |
6593 | } | |
6594 | ||
6595 | setup_coding_system (Fcheck_coding_system (coding_system), &coding); | |
6596 | ||
6597 | if (NILP (count)) | |
6598 | n = 1; | |
6599 | else | |
6600 | { | |
6601 | CHECK_NATNUM (count); | |
6602 | n = XINT (count); | |
6603 | } | |
6604 | ||
6605 | if (coding.type == coding_type_no_conversion | |
6606 | || coding.type == coding_type_raw_text) | |
6607 | return Qnil; | |
6608 | ||
6609 | if (coding.type == coding_type_undecided) | |
6610 | safe_chars = Qnil; | |
6611 | else | |
6612 | safe_chars = coding_safe_chars (&coding); | |
6613 | ||
6614 | if (STRINGP (string) | |
6615 | || from >= GPT || to <= GPT) | |
6616 | positions = unencodable_char_position (safe_chars, from, p, pend, n); | |
6617 | else | |
6618 | { | |
6619 | Lisp_Object args[2]; | |
6620 | ||
6621 | args[0] = unencodable_char_position (safe_chars, from, p, GPT_ADDR, n); | |
96d2e64d | 6622 | n -= XINT (Flength (args[0])); |
068a9dbd KH |
6623 | if (n <= 0) |
6624 | positions = args[0]; | |
6625 | else | |
6626 | { | |
6627 | args[1] = unencodable_char_position (safe_chars, GPT, GAP_END_ADDR, | |
6628 | pend, n); | |
6629 | positions = Fappend (2, args); | |
6630 | } | |
6631 | } | |
6632 | ||
6633 | return (NILP (count) ? Fcar (positions) : positions); | |
6634 | } | |
6635 | ||
6636 | ||
4031e2bf KH |
6637 | Lisp_Object |
6638 | code_convert_region1 (start, end, coding_system, encodep) | |
d46c5b12 | 6639 | Lisp_Object start, end, coding_system; |
4031e2bf | 6640 | int encodep; |
3a73fa5d RS |
6641 | { |
6642 | struct coding_system coding; | |
da55a2b7 | 6643 | int from, to; |
3a73fa5d | 6644 | |
b7826503 PJ |
6645 | CHECK_NUMBER_COERCE_MARKER (start); |
6646 | CHECK_NUMBER_COERCE_MARKER (end); | |
6647 | CHECK_SYMBOL (coding_system); | |
3a73fa5d | 6648 | |
d46c5b12 KH |
6649 | validate_region (&start, &end); |
6650 | from = XFASTINT (start); | |
6651 | to = XFASTINT (end); | |
6652 | ||
3a73fa5d | 6653 | if (NILP (coding_system)) |
d46c5b12 KH |
6654 | return make_number (to - from); |
6655 | ||
3a73fa5d | 6656 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) |
d5db4077 | 6657 | error ("Invalid coding system: %s", SDATA (SYMBOL_NAME (coding_system))); |
3a73fa5d | 6658 | |
d46c5b12 | 6659 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
6660 | coding.src_multibyte = coding.dst_multibyte |
6661 | = !NILP (current_buffer->enable_multibyte_characters); | |
fb88bf2d KH |
6662 | code_convert_region (from, CHAR_TO_BYTE (from), to, CHAR_TO_BYTE (to), |
6663 | &coding, encodep, 1); | |
f072a3e8 | 6664 | Vlast_coding_system_used = coding.symbol; |
fb88bf2d | 6665 | return make_number (coding.produced_char); |
4031e2bf KH |
6666 | } |
6667 | ||
6668 | DEFUN ("decode-coding-region", Fdecode_coding_region, Sdecode_coding_region, | |
6669 | 3, 3, "r\nzCoding system: ", | |
48b0f3ae PJ |
6670 | doc: /* Decode the current region from the specified coding system. |
6671 | When called from a program, takes three arguments: | |
6672 | START, END, and CODING-SYSTEM. START and END are buffer positions. | |
6673 | This function sets `last-coding-system-used' to the precise coding system | |
6674 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6675 | not fully specified.) | |
6676 | It returns the length of the decoded text. */) | |
6677 | (start, end, coding_system) | |
4031e2bf KH |
6678 | Lisp_Object start, end, coding_system; |
6679 | { | |
6680 | return code_convert_region1 (start, end, coding_system, 0); | |
3a73fa5d RS |
6681 | } |
6682 | ||
6683 | DEFUN ("encode-coding-region", Fencode_coding_region, Sencode_coding_region, | |
6684 | 3, 3, "r\nzCoding system: ", | |
48b0f3ae PJ |
6685 | doc: /* Encode the current region into the specified coding system. |
6686 | When called from a program, takes three arguments: | |
6687 | START, END, and CODING-SYSTEM. START and END are buffer positions. | |
6688 | This function sets `last-coding-system-used' to the precise coding system | |
6689 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6690 | not fully specified.) | |
6691 | It returns the length of the encoded text. */) | |
6692 | (start, end, coding_system) | |
d46c5b12 | 6693 | Lisp_Object start, end, coding_system; |
3a73fa5d | 6694 | { |
4031e2bf KH |
6695 | return code_convert_region1 (start, end, coding_system, 1); |
6696 | } | |
3a73fa5d | 6697 | |
4031e2bf KH |
6698 | Lisp_Object |
6699 | code_convert_string1 (string, coding_system, nocopy, encodep) | |
6700 | Lisp_Object string, coding_system, nocopy; | |
6701 | int encodep; | |
6702 | { | |
6703 | struct coding_system coding; | |
3a73fa5d | 6704 | |
b7826503 PJ |
6705 | CHECK_STRING (string); |
6706 | CHECK_SYMBOL (coding_system); | |
4ed46869 | 6707 | |
d46c5b12 | 6708 | if (NILP (coding_system)) |
4031e2bf | 6709 | return (NILP (nocopy) ? Fcopy_sequence (string) : string); |
4ed46869 | 6710 | |
d46c5b12 | 6711 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) |
d5db4077 | 6712 | error ("Invalid coding system: %s", SDATA (SYMBOL_NAME (coding_system))); |
5f1cd180 | 6713 | |
d46c5b12 | 6714 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
6715 | string = (encodep |
6716 | ? encode_coding_string (string, &coding, !NILP (nocopy)) | |
6717 | : decode_coding_string (string, &coding, !NILP (nocopy))); | |
f072a3e8 | 6718 | Vlast_coding_system_used = coding.symbol; |
ec6d2bb8 KH |
6719 | |
6720 | return string; | |
4ed46869 KH |
6721 | } |
6722 | ||
4ed46869 | 6723 | DEFUN ("decode-coding-string", Fdecode_coding_string, Sdecode_coding_string, |
e0e989f6 | 6724 | 2, 3, 0, |
48b0f3ae PJ |
6725 | doc: /* Decode STRING which is encoded in CODING-SYSTEM, and return the result. |
6726 | Optional arg NOCOPY non-nil means it is OK to return STRING itself | |
6727 | if the decoding operation is trivial. | |
6728 | This function sets `last-coding-system-used' to the precise coding system | |
6729 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6730 | not fully specified.) */) | |
6731 | (string, coding_system, nocopy) | |
e0e989f6 | 6732 | Lisp_Object string, coding_system, nocopy; |
4ed46869 | 6733 | { |
f072a3e8 | 6734 | return code_convert_string1 (string, coding_system, nocopy, 0); |
4ed46869 KH |
6735 | } |
6736 | ||
6737 | DEFUN ("encode-coding-string", Fencode_coding_string, Sencode_coding_string, | |
e0e989f6 | 6738 | 2, 3, 0, |
48b0f3ae PJ |
6739 | doc: /* Encode STRING to CODING-SYSTEM, and return the result. |
6740 | Optional arg NOCOPY non-nil means it is OK to return STRING itself | |
6741 | if the encoding operation is trivial. | |
6742 | This function sets `last-coding-system-used' to the precise coding system | |
6743 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6744 | not fully specified.) */) | |
6745 | (string, coding_system, nocopy) | |
e0e989f6 | 6746 | Lisp_Object string, coding_system, nocopy; |
4ed46869 | 6747 | { |
f072a3e8 | 6748 | return code_convert_string1 (string, coding_system, nocopy, 1); |
4ed46869 | 6749 | } |
4031e2bf | 6750 | |
ecec61c1 | 6751 | /* Encode or decode STRING according to CODING_SYSTEM. |
ec6d2bb8 KH |
6752 | Do not set Vlast_coding_system_used. |
6753 | ||
6754 | This function is called only from macros DECODE_FILE and | |
6755 | ENCODE_FILE, thus we ignore character composition. */ | |
ecec61c1 KH |
6756 | |
6757 | Lisp_Object | |
6758 | code_convert_string_norecord (string, coding_system, encodep) | |
6759 | Lisp_Object string, coding_system; | |
6760 | int encodep; | |
6761 | { | |
6762 | struct coding_system coding; | |
6763 | ||
b7826503 PJ |
6764 | CHECK_STRING (string); |
6765 | CHECK_SYMBOL (coding_system); | |
ecec61c1 KH |
6766 | |
6767 | if (NILP (coding_system)) | |
6768 | return string; | |
6769 | ||
6770 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) | |
d5db4077 | 6771 | error ("Invalid coding system: %s", SDATA (SYMBOL_NAME (coding_system))); |
ecec61c1 | 6772 | |
ec6d2bb8 | 6773 | coding.composing = COMPOSITION_DISABLED; |
ecec61c1 | 6774 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
6775 | return (encodep |
6776 | ? encode_coding_string (string, &coding, 1) | |
6777 | : decode_coding_string (string, &coding, 1)); | |
ecec61c1 | 6778 | } |
3a73fa5d | 6779 | \f |
4ed46869 | 6780 | DEFUN ("decode-sjis-char", Fdecode_sjis_char, Sdecode_sjis_char, 1, 1, 0, |
48b0f3ae PJ |
6781 | doc: /* Decode a Japanese character which has CODE in shift_jis encoding. |
6782 | Return the corresponding character. */) | |
6783 | (code) | |
4ed46869 KH |
6784 | Lisp_Object code; |
6785 | { | |
6786 | unsigned char c1, c2, s1, s2; | |
6787 | Lisp_Object val; | |
6788 | ||
b7826503 | 6789 | CHECK_NUMBER (code); |
4ed46869 | 6790 | s1 = (XFASTINT (code)) >> 8, s2 = (XFASTINT (code)) & 0xFF; |
55ab7be3 KH |
6791 | if (s1 == 0) |
6792 | { | |
c28a9453 KH |
6793 | if (s2 < 0x80) |
6794 | XSETFASTINT (val, s2); | |
6795 | else if (s2 >= 0xA0 || s2 <= 0xDF) | |
b73bfc1c | 6796 | XSETFASTINT (val, MAKE_CHAR (charset_katakana_jisx0201, s2, 0)); |
c28a9453 | 6797 | else |
9da8350f | 6798 | error ("Invalid Shift JIS code: %x", XFASTINT (code)); |
55ab7be3 KH |
6799 | } |
6800 | else | |
6801 | { | |
87323294 | 6802 | if ((s1 < 0x80 || (s1 > 0x9F && s1 < 0xE0) || s1 > 0xEF) |
55ab7be3 | 6803 | || (s2 < 0x40 || s2 == 0x7F || s2 > 0xFC)) |
9da8350f | 6804 | error ("Invalid Shift JIS code: %x", XFASTINT (code)); |
55ab7be3 | 6805 | DECODE_SJIS (s1, s2, c1, c2); |
b73bfc1c | 6806 | XSETFASTINT (val, MAKE_CHAR (charset_jisx0208, c1, c2)); |
55ab7be3 | 6807 | } |
4ed46869 KH |
6808 | return val; |
6809 | } | |
6810 | ||
6811 | DEFUN ("encode-sjis-char", Fencode_sjis_char, Sencode_sjis_char, 1, 1, 0, | |
48b0f3ae PJ |
6812 | doc: /* Encode a Japanese character CHAR to shift_jis encoding. |
6813 | Return the corresponding code in SJIS. */) | |
6814 | (ch) | |
4ed46869 KH |
6815 | Lisp_Object ch; |
6816 | { | |
bcf26d6a | 6817 | int charset, c1, c2, s1, s2; |
4ed46869 KH |
6818 | Lisp_Object val; |
6819 | ||
b7826503 | 6820 | CHECK_NUMBER (ch); |
4ed46869 | 6821 | SPLIT_CHAR (XFASTINT (ch), charset, c1, c2); |
c28a9453 KH |
6822 | if (charset == CHARSET_ASCII) |
6823 | { | |
6824 | val = ch; | |
6825 | } | |
6826 | else if (charset == charset_jisx0208 | |
6827 | && c1 > 0x20 && c1 < 0x7F && c2 > 0x20 && c2 < 0x7F) | |
4ed46869 KH |
6828 | { |
6829 | ENCODE_SJIS (c1, c2, s1, s2); | |
bcf26d6a | 6830 | XSETFASTINT (val, (s1 << 8) | s2); |
4ed46869 | 6831 | } |
55ab7be3 KH |
6832 | else if (charset == charset_katakana_jisx0201 |
6833 | && c1 > 0x20 && c2 < 0xE0) | |
6834 | { | |
6835 | XSETFASTINT (val, c1 | 0x80); | |
6836 | } | |
4ed46869 | 6837 | else |
55ab7be3 | 6838 | error ("Can't encode to shift_jis: %d", XFASTINT (ch)); |
4ed46869 KH |
6839 | return val; |
6840 | } | |
6841 | ||
6842 | DEFUN ("decode-big5-char", Fdecode_big5_char, Sdecode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
6843 | doc: /* Decode a Big5 character which has CODE in BIG5 coding system. |
6844 | Return the corresponding character. */) | |
6845 | (code) | |
4ed46869 KH |
6846 | Lisp_Object code; |
6847 | { | |
6848 | int charset; | |
6849 | unsigned char b1, b2, c1, c2; | |
6850 | Lisp_Object val; | |
6851 | ||
b7826503 | 6852 | CHECK_NUMBER (code); |
4ed46869 | 6853 | b1 = (XFASTINT (code)) >> 8, b2 = (XFASTINT (code)) & 0xFF; |
c28a9453 KH |
6854 | if (b1 == 0) |
6855 | { | |
6856 | if (b2 >= 0x80) | |
9da8350f | 6857 | error ("Invalid BIG5 code: %x", XFASTINT (code)); |
c28a9453 KH |
6858 | val = code; |
6859 | } | |
6860 | else | |
6861 | { | |
6862 | if ((b1 < 0xA1 || b1 > 0xFE) | |
6863 | || (b2 < 0x40 || (b2 > 0x7E && b2 < 0xA1) || b2 > 0xFE)) | |
9da8350f | 6864 | error ("Invalid BIG5 code: %x", XFASTINT (code)); |
c28a9453 | 6865 | DECODE_BIG5 (b1, b2, charset, c1, c2); |
b73bfc1c | 6866 | XSETFASTINT (val, MAKE_CHAR (charset, c1, c2)); |
c28a9453 | 6867 | } |
4ed46869 KH |
6868 | return val; |
6869 | } | |
6870 | ||
6871 | DEFUN ("encode-big5-char", Fencode_big5_char, Sencode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
6872 | doc: /* Encode the Big5 character CHAR to BIG5 coding system. |
6873 | Return the corresponding character code in Big5. */) | |
6874 | (ch) | |
4ed46869 KH |
6875 | Lisp_Object ch; |
6876 | { | |
bcf26d6a | 6877 | int charset, c1, c2, b1, b2; |
4ed46869 KH |
6878 | Lisp_Object val; |
6879 | ||
b7826503 | 6880 | CHECK_NUMBER (ch); |
4ed46869 | 6881 | SPLIT_CHAR (XFASTINT (ch), charset, c1, c2); |
c28a9453 KH |
6882 | if (charset == CHARSET_ASCII) |
6883 | { | |
6884 | val = ch; | |
6885 | } | |
6886 | else if ((charset == charset_big5_1 | |
6887 | && (XFASTINT (ch) >= 0x250a1 && XFASTINT (ch) <= 0x271ec)) | |
6888 | || (charset == charset_big5_2 | |
6889 | && XFASTINT (ch) >= 0x290a1 && XFASTINT (ch) <= 0x2bdb2)) | |
4ed46869 KH |
6890 | { |
6891 | ENCODE_BIG5 (charset, c1, c2, b1, b2); | |
bcf26d6a | 6892 | XSETFASTINT (val, (b1 << 8) | b2); |
4ed46869 KH |
6893 | } |
6894 | else | |
c28a9453 | 6895 | error ("Can't encode to Big5: %d", XFASTINT (ch)); |
4ed46869 KH |
6896 | return val; |
6897 | } | |
3a73fa5d | 6898 | \f |
002fdb44 | 6899 | DEFUN ("set-terminal-coding-system-internal", Fset_terminal_coding_system_internal, |
48b0f3ae PJ |
6900 | Sset_terminal_coding_system_internal, 1, 1, 0, |
6901 | doc: /* Internal use only. */) | |
6902 | (coding_system) | |
4ed46869 KH |
6903 | Lisp_Object coding_system; |
6904 | { | |
b7826503 | 6905 | CHECK_SYMBOL (coding_system); |
4ed46869 | 6906 | setup_coding_system (Fcheck_coding_system (coding_system), &terminal_coding); |
70c22245 | 6907 | /* We had better not send unsafe characters to terminal. */ |
6e85d753 | 6908 | terminal_coding.flags |= CODING_FLAG_ISO_SAFE; |
8ca3766a | 6909 | /* Character composition should be disabled. */ |
ec6d2bb8 | 6910 | terminal_coding.composing = COMPOSITION_DISABLED; |
bd64290d KH |
6911 | /* Error notification should be suppressed. */ |
6912 | terminal_coding.suppress_error = 1; | |
b73bfc1c KH |
6913 | terminal_coding.src_multibyte = 1; |
6914 | terminal_coding.dst_multibyte = 0; | |
4ed46869 KH |
6915 | return Qnil; |
6916 | } | |
6917 | ||
002fdb44 | 6918 | DEFUN ("set-safe-terminal-coding-system-internal", Fset_safe_terminal_coding_system_internal, |
48b0f3ae | 6919 | Sset_safe_terminal_coding_system_internal, 1, 1, 0, |
ddb67bdc | 6920 | doc: /* Internal use only. */) |
48b0f3ae | 6921 | (coding_system) |
c4825358 KH |
6922 | Lisp_Object coding_system; |
6923 | { | |
b7826503 | 6924 | CHECK_SYMBOL (coding_system); |
c4825358 KH |
6925 | setup_coding_system (Fcheck_coding_system (coding_system), |
6926 | &safe_terminal_coding); | |
8ca3766a | 6927 | /* Character composition should be disabled. */ |
ec6d2bb8 | 6928 | safe_terminal_coding.composing = COMPOSITION_DISABLED; |
bd64290d KH |
6929 | /* Error notification should be suppressed. */ |
6930 | terminal_coding.suppress_error = 1; | |
b73bfc1c KH |
6931 | safe_terminal_coding.src_multibyte = 1; |
6932 | safe_terminal_coding.dst_multibyte = 0; | |
c4825358 KH |
6933 | return Qnil; |
6934 | } | |
6935 | ||
002fdb44 DL |
6936 | DEFUN ("terminal-coding-system", Fterminal_coding_system, |
6937 | Sterminal_coding_system, 0, 0, 0, | |
48b0f3ae PJ |
6938 | doc: /* Return coding system specified for terminal output. */) |
6939 | () | |
4ed46869 KH |
6940 | { |
6941 | return terminal_coding.symbol; | |
6942 | } | |
6943 | ||
002fdb44 | 6944 | DEFUN ("set-keyboard-coding-system-internal", Fset_keyboard_coding_system_internal, |
48b0f3ae PJ |
6945 | Sset_keyboard_coding_system_internal, 1, 1, 0, |
6946 | doc: /* Internal use only. */) | |
6947 | (coding_system) | |
4ed46869 KH |
6948 | Lisp_Object coding_system; |
6949 | { | |
b7826503 | 6950 | CHECK_SYMBOL (coding_system); |
4ed46869 | 6951 | setup_coding_system (Fcheck_coding_system (coding_system), &keyboard_coding); |
8ca3766a | 6952 | /* Character composition should be disabled. */ |
ec6d2bb8 | 6953 | keyboard_coding.composing = COMPOSITION_DISABLED; |
4ed46869 KH |
6954 | return Qnil; |
6955 | } | |
6956 | ||
002fdb44 DL |
6957 | DEFUN ("keyboard-coding-system", Fkeyboard_coding_system, |
6958 | Skeyboard_coding_system, 0, 0, 0, | |
48b0f3ae PJ |
6959 | doc: /* Return coding system specified for decoding keyboard input. */) |
6960 | () | |
4ed46869 KH |
6961 | { |
6962 | return keyboard_coding.symbol; | |
6963 | } | |
6964 | ||
6965 | \f | |
a5d301df KH |
6966 | DEFUN ("find-operation-coding-system", Ffind_operation_coding_system, |
6967 | Sfind_operation_coding_system, 1, MANY, 0, | |
48b0f3ae PJ |
6968 | doc: /* Choose a coding system for an operation based on the target name. |
6969 | The value names a pair of coding systems: (DECODING-SYSTEM . ENCODING-SYSTEM). | |
6970 | DECODING-SYSTEM is the coding system to use for decoding | |
6971 | \(in case OPERATION does decoding), and ENCODING-SYSTEM is the coding system | |
6972 | for encoding (in case OPERATION does encoding). | |
6973 | ||
6974 | The first argument OPERATION specifies an I/O primitive: | |
6975 | For file I/O, `insert-file-contents' or `write-region'. | |
6976 | For process I/O, `call-process', `call-process-region', or `start-process'. | |
6977 | For network I/O, `open-network-stream'. | |
6978 | ||
6979 | The remaining arguments should be the same arguments that were passed | |
6980 | to the primitive. Depending on which primitive, one of those arguments | |
6981 | is selected as the TARGET. For example, if OPERATION does file I/O, | |
6982 | whichever argument specifies the file name is TARGET. | |
6983 | ||
6984 | TARGET has a meaning which depends on OPERATION: | |
6985 | For file I/O, TARGET is a file name. | |
6986 | For process I/O, TARGET is a process name. | |
6987 | For network I/O, TARGET is a service name or a port number | |
6988 | ||
6989 | This function looks up what specified for TARGET in, | |
6990 | `file-coding-system-alist', `process-coding-system-alist', | |
6991 | or `network-coding-system-alist' depending on OPERATION. | |
6992 | They may specify a coding system, a cons of coding systems, | |
6993 | or a function symbol to call. | |
6994 | In the last case, we call the function with one argument, | |
6995 | which is a list of all the arguments given to this function. | |
6996 | ||
6997 | usage: (find-operation-coding-system OPERATION ARGUMENTS ...) */) | |
6998 | (nargs, args) | |
4ed46869 KH |
6999 | int nargs; |
7000 | Lisp_Object *args; | |
7001 | { | |
7002 | Lisp_Object operation, target_idx, target, val; | |
7003 | register Lisp_Object chain; | |
7004 | ||
7005 | if (nargs < 2) | |
7006 | error ("Too few arguments"); | |
7007 | operation = args[0]; | |
7008 | if (!SYMBOLP (operation) | |
7009 | || !INTEGERP (target_idx = Fget (operation, Qtarget_idx))) | |
8ca3766a | 7010 | error ("Invalid first argument"); |
4ed46869 KH |
7011 | if (nargs < 1 + XINT (target_idx)) |
7012 | error ("Too few arguments for operation: %s", | |
d5db4077 | 7013 | SDATA (SYMBOL_NAME (operation))); |
7f787cfd KH |
7014 | /* For write-region, if the 6th argument (i.e. VISIT, the 5th |
7015 | argument to write-region) is string, it must be treated as a | |
7016 | target file name. */ | |
7017 | if (EQ (operation, Qwrite_region) | |
7018 | && nargs > 5 | |
7019 | && STRINGP (args[5])) | |
d90ed3b4 | 7020 | target_idx = make_number (4); |
4ed46869 KH |
7021 | target = args[XINT (target_idx) + 1]; |
7022 | if (!(STRINGP (target) | |
7023 | || (EQ (operation, Qopen_network_stream) && INTEGERP (target)))) | |
8ca3766a | 7024 | error ("Invalid argument %d", XINT (target_idx) + 1); |
4ed46869 | 7025 | |
2e34157c RS |
7026 | chain = ((EQ (operation, Qinsert_file_contents) |
7027 | || EQ (operation, Qwrite_region)) | |
02ba4723 | 7028 | ? Vfile_coding_system_alist |
2e34157c | 7029 | : (EQ (operation, Qopen_network_stream) |
02ba4723 KH |
7030 | ? Vnetwork_coding_system_alist |
7031 | : Vprocess_coding_system_alist)); | |
4ed46869 KH |
7032 | if (NILP (chain)) |
7033 | return Qnil; | |
7034 | ||
03699b14 | 7035 | for (; CONSP (chain); chain = XCDR (chain)) |
4ed46869 | 7036 | { |
f44d27ce | 7037 | Lisp_Object elt; |
03699b14 | 7038 | elt = XCAR (chain); |
4ed46869 KH |
7039 | |
7040 | if (CONSP (elt) | |
7041 | && ((STRINGP (target) | |
03699b14 KR |
7042 | && STRINGP (XCAR (elt)) |
7043 | && fast_string_match (XCAR (elt), target) >= 0) | |
7044 | || (INTEGERP (target) && EQ (target, XCAR (elt))))) | |
02ba4723 | 7045 | { |
03699b14 | 7046 | val = XCDR (elt); |
b19fd4c5 KH |
7047 | /* Here, if VAL is both a valid coding system and a valid |
7048 | function symbol, we return VAL as a coding system. */ | |
02ba4723 KH |
7049 | if (CONSP (val)) |
7050 | return val; | |
7051 | if (! SYMBOLP (val)) | |
7052 | return Qnil; | |
7053 | if (! NILP (Fcoding_system_p (val))) | |
7054 | return Fcons (val, val); | |
b19fd4c5 KH |
7055 | if (! NILP (Ffboundp (val))) |
7056 | { | |
7057 | val = call1 (val, Flist (nargs, args)); | |
7058 | if (CONSP (val)) | |
7059 | return val; | |
7060 | if (SYMBOLP (val) && ! NILP (Fcoding_system_p (val))) | |
7061 | return Fcons (val, val); | |
7062 | } | |
02ba4723 KH |
7063 | return Qnil; |
7064 | } | |
4ed46869 KH |
7065 | } |
7066 | return Qnil; | |
7067 | } | |
7068 | ||
1397dc18 KH |
7069 | DEFUN ("update-coding-systems-internal", Fupdate_coding_systems_internal, |
7070 | Supdate_coding_systems_internal, 0, 0, 0, | |
48b0f3ae PJ |
7071 | doc: /* Update internal database for ISO2022 and CCL based coding systems. |
7072 | When values of any coding categories are changed, you must | |
7073 | call this function. */) | |
7074 | () | |
d46c5b12 KH |
7075 | { |
7076 | int i; | |
7077 | ||
fa42c37f | 7078 | for (i = CODING_CATEGORY_IDX_EMACS_MULE; i < CODING_CATEGORY_IDX_MAX; i++) |
d46c5b12 | 7079 | { |
1397dc18 KH |
7080 | Lisp_Object val; |
7081 | ||
f5c1dd0d | 7082 | val = SYMBOL_VALUE (XVECTOR (Vcoding_category_table)->contents[i]); |
1397dc18 KH |
7083 | if (!NILP (val)) |
7084 | { | |
7085 | if (! coding_system_table[i]) | |
7086 | coding_system_table[i] = ((struct coding_system *) | |
7087 | xmalloc (sizeof (struct coding_system))); | |
7088 | setup_coding_system (val, coding_system_table[i]); | |
7089 | } | |
7090 | else if (coding_system_table[i]) | |
7091 | { | |
7092 | xfree (coding_system_table[i]); | |
7093 | coding_system_table[i] = NULL; | |
7094 | } | |
d46c5b12 | 7095 | } |
1397dc18 | 7096 | |
d46c5b12 KH |
7097 | return Qnil; |
7098 | } | |
7099 | ||
66cfb530 KH |
7100 | DEFUN ("set-coding-priority-internal", Fset_coding_priority_internal, |
7101 | Sset_coding_priority_internal, 0, 0, 0, | |
48b0f3ae PJ |
7102 | doc: /* Update internal database for the current value of `coding-category-list'. |
7103 | This function is internal use only. */) | |
7104 | () | |
66cfb530 KH |
7105 | { |
7106 | int i = 0, idx; | |
84d60297 RS |
7107 | Lisp_Object val; |
7108 | ||
7109 | val = Vcoding_category_list; | |
66cfb530 KH |
7110 | |
7111 | while (CONSP (val) && i < CODING_CATEGORY_IDX_MAX) | |
7112 | { | |
03699b14 | 7113 | if (! SYMBOLP (XCAR (val))) |
66cfb530 | 7114 | break; |
03699b14 | 7115 | idx = XFASTINT (Fget (XCAR (val), Qcoding_category_index)); |
66cfb530 KH |
7116 | if (idx >= CODING_CATEGORY_IDX_MAX) |
7117 | break; | |
7118 | coding_priorities[i++] = (1 << idx); | |
03699b14 | 7119 | val = XCDR (val); |
66cfb530 KH |
7120 | } |
7121 | /* If coding-category-list is valid and contains all coding | |
7122 | categories, `i' should be CODING_CATEGORY_IDX_MAX now. If not, | |
fa42c37f | 7123 | the following code saves Emacs from crashing. */ |
66cfb530 KH |
7124 | while (i < CODING_CATEGORY_IDX_MAX) |
7125 | coding_priorities[i++] = CODING_CATEGORY_MASK_RAW_TEXT; | |
7126 | ||
7127 | return Qnil; | |
7128 | } | |
7129 | ||
4ed46869 KH |
7130 | #endif /* emacs */ |
7131 | ||
7132 | \f | |
1397dc18 | 7133 | /*** 9. Post-amble ***/ |
4ed46869 | 7134 | |
dfcf069d | 7135 | void |
4ed46869 KH |
7136 | init_coding_once () |
7137 | { | |
7138 | int i; | |
7139 | ||
93dec019 | 7140 | /* Emacs' internal format specific initialize routine. */ |
4ed46869 KH |
7141 | for (i = 0; i <= 0x20; i++) |
7142 | emacs_code_class[i] = EMACS_control_code; | |
7143 | emacs_code_class[0x0A] = EMACS_linefeed_code; | |
7144 | emacs_code_class[0x0D] = EMACS_carriage_return_code; | |
7145 | for (i = 0x21 ; i < 0x7F; i++) | |
7146 | emacs_code_class[i] = EMACS_ascii_code; | |
7147 | emacs_code_class[0x7F] = EMACS_control_code; | |
ec6d2bb8 | 7148 | for (i = 0x80; i < 0xFF; i++) |
4ed46869 KH |
7149 | emacs_code_class[i] = EMACS_invalid_code; |
7150 | emacs_code_class[LEADING_CODE_PRIVATE_11] = EMACS_leading_code_3; | |
7151 | emacs_code_class[LEADING_CODE_PRIVATE_12] = EMACS_leading_code_3; | |
7152 | emacs_code_class[LEADING_CODE_PRIVATE_21] = EMACS_leading_code_4; | |
7153 | emacs_code_class[LEADING_CODE_PRIVATE_22] = EMACS_leading_code_4; | |
7154 | ||
7155 | /* ISO2022 specific initialize routine. */ | |
7156 | for (i = 0; i < 0x20; i++) | |
b73bfc1c | 7157 | iso_code_class[i] = ISO_control_0; |
4ed46869 KH |
7158 | for (i = 0x21; i < 0x7F; i++) |
7159 | iso_code_class[i] = ISO_graphic_plane_0; | |
7160 | for (i = 0x80; i < 0xA0; i++) | |
b73bfc1c | 7161 | iso_code_class[i] = ISO_control_1; |
4ed46869 KH |
7162 | for (i = 0xA1; i < 0xFF; i++) |
7163 | iso_code_class[i] = ISO_graphic_plane_1; | |
7164 | iso_code_class[0x20] = iso_code_class[0x7F] = ISO_0x20_or_0x7F; | |
7165 | iso_code_class[0xA0] = iso_code_class[0xFF] = ISO_0xA0_or_0xFF; | |
7166 | iso_code_class[ISO_CODE_CR] = ISO_carriage_return; | |
7167 | iso_code_class[ISO_CODE_SO] = ISO_shift_out; | |
7168 | iso_code_class[ISO_CODE_SI] = ISO_shift_in; | |
7169 | iso_code_class[ISO_CODE_SS2_7] = ISO_single_shift_2_7; | |
7170 | iso_code_class[ISO_CODE_ESC] = ISO_escape; | |
7171 | iso_code_class[ISO_CODE_SS2] = ISO_single_shift_2; | |
7172 | iso_code_class[ISO_CODE_SS3] = ISO_single_shift_3; | |
7173 | iso_code_class[ISO_CODE_CSI] = ISO_control_sequence_introducer; | |
7174 | ||
e0e989f6 KH |
7175 | setup_coding_system (Qnil, &keyboard_coding); |
7176 | setup_coding_system (Qnil, &terminal_coding); | |
c4825358 | 7177 | setup_coding_system (Qnil, &safe_terminal_coding); |
6bc51348 | 7178 | setup_coding_system (Qnil, &default_buffer_file_coding); |
9ce27fde | 7179 | |
d46c5b12 KH |
7180 | bzero (coding_system_table, sizeof coding_system_table); |
7181 | ||
66cfb530 KH |
7182 | bzero (ascii_skip_code, sizeof ascii_skip_code); |
7183 | for (i = 0; i < 128; i++) | |
7184 | ascii_skip_code[i] = 1; | |
7185 | ||
9ce27fde KH |
7186 | #if defined (MSDOS) || defined (WINDOWSNT) |
7187 | system_eol_type = CODING_EOL_CRLF; | |
7188 | #else | |
7189 | system_eol_type = CODING_EOL_LF; | |
7190 | #endif | |
b843d1ae KH |
7191 | |
7192 | inhibit_pre_post_conversion = 0; | |
e0e989f6 KH |
7193 | } |
7194 | ||
7195 | #ifdef emacs | |
7196 | ||
dfcf069d | 7197 | void |
e0e989f6 KH |
7198 | syms_of_coding () |
7199 | { | |
7200 | Qtarget_idx = intern ("target-idx"); | |
7201 | staticpro (&Qtarget_idx); | |
7202 | ||
bb0115a2 RS |
7203 | Qcoding_system_history = intern ("coding-system-history"); |
7204 | staticpro (&Qcoding_system_history); | |
7205 | Fset (Qcoding_system_history, Qnil); | |
7206 | ||
9ce27fde | 7207 | /* Target FILENAME is the first argument. */ |
e0e989f6 | 7208 | Fput (Qinsert_file_contents, Qtarget_idx, make_number (0)); |
9ce27fde | 7209 | /* Target FILENAME is the third argument. */ |
e0e989f6 KH |
7210 | Fput (Qwrite_region, Qtarget_idx, make_number (2)); |
7211 | ||
7212 | Qcall_process = intern ("call-process"); | |
7213 | staticpro (&Qcall_process); | |
9ce27fde | 7214 | /* Target PROGRAM is the first argument. */ |
e0e989f6 KH |
7215 | Fput (Qcall_process, Qtarget_idx, make_number (0)); |
7216 | ||
7217 | Qcall_process_region = intern ("call-process-region"); | |
7218 | staticpro (&Qcall_process_region); | |
9ce27fde | 7219 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
7220 | Fput (Qcall_process_region, Qtarget_idx, make_number (2)); |
7221 | ||
7222 | Qstart_process = intern ("start-process"); | |
7223 | staticpro (&Qstart_process); | |
9ce27fde | 7224 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
7225 | Fput (Qstart_process, Qtarget_idx, make_number (2)); |
7226 | ||
7227 | Qopen_network_stream = intern ("open-network-stream"); | |
7228 | staticpro (&Qopen_network_stream); | |
9ce27fde | 7229 | /* Target SERVICE is the fourth argument. */ |
e0e989f6 KH |
7230 | Fput (Qopen_network_stream, Qtarget_idx, make_number (3)); |
7231 | ||
4ed46869 KH |
7232 | Qcoding_system = intern ("coding-system"); |
7233 | staticpro (&Qcoding_system); | |
7234 | ||
7235 | Qeol_type = intern ("eol-type"); | |
7236 | staticpro (&Qeol_type); | |
7237 | ||
7238 | Qbuffer_file_coding_system = intern ("buffer-file-coding-system"); | |
7239 | staticpro (&Qbuffer_file_coding_system); | |
7240 | ||
7241 | Qpost_read_conversion = intern ("post-read-conversion"); | |
7242 | staticpro (&Qpost_read_conversion); | |
7243 | ||
7244 | Qpre_write_conversion = intern ("pre-write-conversion"); | |
7245 | staticpro (&Qpre_write_conversion); | |
7246 | ||
27901516 KH |
7247 | Qno_conversion = intern ("no-conversion"); |
7248 | staticpro (&Qno_conversion); | |
7249 | ||
7250 | Qundecided = intern ("undecided"); | |
7251 | staticpro (&Qundecided); | |
7252 | ||
4ed46869 KH |
7253 | Qcoding_system_p = intern ("coding-system-p"); |
7254 | staticpro (&Qcoding_system_p); | |
7255 | ||
7256 | Qcoding_system_error = intern ("coding-system-error"); | |
7257 | staticpro (&Qcoding_system_error); | |
7258 | ||
7259 | Fput (Qcoding_system_error, Qerror_conditions, | |
7260 | Fcons (Qcoding_system_error, Fcons (Qerror, Qnil))); | |
7261 | Fput (Qcoding_system_error, Qerror_message, | |
9ce27fde | 7262 | build_string ("Invalid coding system")); |
4ed46869 | 7263 | |
d46c5b12 KH |
7264 | Qcoding_category = intern ("coding-category"); |
7265 | staticpro (&Qcoding_category); | |
4ed46869 KH |
7266 | Qcoding_category_index = intern ("coding-category-index"); |
7267 | staticpro (&Qcoding_category_index); | |
7268 | ||
d46c5b12 KH |
7269 | Vcoding_category_table |
7270 | = Fmake_vector (make_number (CODING_CATEGORY_IDX_MAX), Qnil); | |
7271 | staticpro (&Vcoding_category_table); | |
4ed46869 KH |
7272 | { |
7273 | int i; | |
7274 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
7275 | { | |
d46c5b12 KH |
7276 | XVECTOR (Vcoding_category_table)->contents[i] |
7277 | = intern (coding_category_name[i]); | |
7278 | Fput (XVECTOR (Vcoding_category_table)->contents[i], | |
7279 | Qcoding_category_index, make_number (i)); | |
4ed46869 KH |
7280 | } |
7281 | } | |
7282 | ||
f967223b KH |
7283 | Qtranslation_table = intern ("translation-table"); |
7284 | staticpro (&Qtranslation_table); | |
1397dc18 | 7285 | Fput (Qtranslation_table, Qchar_table_extra_slots, make_number (1)); |
bdd9fb48 | 7286 | |
f967223b KH |
7287 | Qtranslation_table_id = intern ("translation-table-id"); |
7288 | staticpro (&Qtranslation_table_id); | |
84fbb8a0 | 7289 | |
f967223b KH |
7290 | Qtranslation_table_for_decode = intern ("translation-table-for-decode"); |
7291 | staticpro (&Qtranslation_table_for_decode); | |
a5d301df | 7292 | |
f967223b KH |
7293 | Qtranslation_table_for_encode = intern ("translation-table-for-encode"); |
7294 | staticpro (&Qtranslation_table_for_encode); | |
a5d301df | 7295 | |
05e6f5dc KH |
7296 | Qsafe_chars = intern ("safe-chars"); |
7297 | staticpro (&Qsafe_chars); | |
7298 | ||
7299 | Qchar_coding_system = intern ("char-coding-system"); | |
7300 | staticpro (&Qchar_coding_system); | |
7301 | ||
7302 | /* Intern this now in case it isn't already done. | |
7303 | Setting this variable twice is harmless. | |
7304 | But don't staticpro it here--that is done in alloc.c. */ | |
7305 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
7306 | Fput (Qsafe_chars, Qchar_table_extra_slots, make_number (0)); | |
0192762c | 7307 | Fput (Qchar_coding_system, Qchar_table_extra_slots, make_number (2)); |
70c22245 | 7308 | |
1397dc18 KH |
7309 | Qvalid_codes = intern ("valid-codes"); |
7310 | staticpro (&Qvalid_codes); | |
7311 | ||
9ce27fde KH |
7312 | Qemacs_mule = intern ("emacs-mule"); |
7313 | staticpro (&Qemacs_mule); | |
7314 | ||
d46c5b12 KH |
7315 | Qraw_text = intern ("raw-text"); |
7316 | staticpro (&Qraw_text); | |
7317 | ||
4ed46869 KH |
7318 | defsubr (&Scoding_system_p); |
7319 | defsubr (&Sread_coding_system); | |
7320 | defsubr (&Sread_non_nil_coding_system); | |
7321 | defsubr (&Scheck_coding_system); | |
7322 | defsubr (&Sdetect_coding_region); | |
d46c5b12 | 7323 | defsubr (&Sdetect_coding_string); |
05e6f5dc | 7324 | defsubr (&Sfind_coding_systems_region_internal); |
068a9dbd | 7325 | defsubr (&Sunencodable_char_position); |
4ed46869 KH |
7326 | defsubr (&Sdecode_coding_region); |
7327 | defsubr (&Sencode_coding_region); | |
7328 | defsubr (&Sdecode_coding_string); | |
7329 | defsubr (&Sencode_coding_string); | |
7330 | defsubr (&Sdecode_sjis_char); | |
7331 | defsubr (&Sencode_sjis_char); | |
7332 | defsubr (&Sdecode_big5_char); | |
7333 | defsubr (&Sencode_big5_char); | |
1ba9e4ab | 7334 | defsubr (&Sset_terminal_coding_system_internal); |
c4825358 | 7335 | defsubr (&Sset_safe_terminal_coding_system_internal); |
4ed46869 | 7336 | defsubr (&Sterminal_coding_system); |
1ba9e4ab | 7337 | defsubr (&Sset_keyboard_coding_system_internal); |
4ed46869 | 7338 | defsubr (&Skeyboard_coding_system); |
a5d301df | 7339 | defsubr (&Sfind_operation_coding_system); |
1397dc18 | 7340 | defsubr (&Supdate_coding_systems_internal); |
66cfb530 | 7341 | defsubr (&Sset_coding_priority_internal); |
4ed46869 | 7342 | |
4608c386 | 7343 | DEFVAR_LISP ("coding-system-list", &Vcoding_system_list, |
48b0f3ae PJ |
7344 | doc: /* List of coding systems. |
7345 | ||
7346 | Do not alter the value of this variable manually. This variable should be | |
7347 | updated by the functions `make-coding-system' and | |
7348 | `define-coding-system-alias'. */); | |
4608c386 KH |
7349 | Vcoding_system_list = Qnil; |
7350 | ||
7351 | DEFVAR_LISP ("coding-system-alist", &Vcoding_system_alist, | |
48b0f3ae PJ |
7352 | doc: /* Alist of coding system names. |
7353 | Each element is one element list of coding system name. | |
7354 | This variable is given to `completing-read' as TABLE argument. | |
7355 | ||
7356 | Do not alter the value of this variable manually. This variable should be | |
7357 | updated by the functions `make-coding-system' and | |
7358 | `define-coding-system-alias'. */); | |
4608c386 KH |
7359 | Vcoding_system_alist = Qnil; |
7360 | ||
4ed46869 | 7361 | DEFVAR_LISP ("coding-category-list", &Vcoding_category_list, |
48b0f3ae PJ |
7362 | doc: /* List of coding-categories (symbols) ordered by priority. |
7363 | ||
7364 | On detecting a coding system, Emacs tries code detection algorithms | |
7365 | associated with each coding-category one by one in this order. When | |
7366 | one algorithm agrees with a byte sequence of source text, the coding | |
7367 | system bound to the corresponding coding-category is selected. */); | |
4ed46869 KH |
7368 | { |
7369 | int i; | |
7370 | ||
7371 | Vcoding_category_list = Qnil; | |
7372 | for (i = CODING_CATEGORY_IDX_MAX - 1; i >= 0; i--) | |
7373 | Vcoding_category_list | |
d46c5b12 KH |
7374 | = Fcons (XVECTOR (Vcoding_category_table)->contents[i], |
7375 | Vcoding_category_list); | |
4ed46869 KH |
7376 | } |
7377 | ||
7378 | DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read, | |
48b0f3ae PJ |
7379 | doc: /* Specify the coding system for read operations. |
7380 | It is useful to bind this variable with `let', but do not set it globally. | |
7381 | If the value is a coding system, it is used for decoding on read operation. | |
7382 | If not, an appropriate element is used from one of the coding system alists: | |
7383 | There are three such tables, `file-coding-system-alist', | |
7384 | `process-coding-system-alist', and `network-coding-system-alist'. */); | |
4ed46869 KH |
7385 | Vcoding_system_for_read = Qnil; |
7386 | ||
7387 | DEFVAR_LISP ("coding-system-for-write", &Vcoding_system_for_write, | |
48b0f3ae PJ |
7388 | doc: /* Specify the coding system for write operations. |
7389 | Programs bind this variable with `let', but you should not set it globally. | |
7390 | If the value is a coding system, it is used for encoding of output, | |
7391 | when writing it to a file and when sending it to a file or subprocess. | |
7392 | ||
7393 | If this does not specify a coding system, an appropriate element | |
7394 | is used from one of the coding system alists: | |
7395 | There are three such tables, `file-coding-system-alist', | |
7396 | `process-coding-system-alist', and `network-coding-system-alist'. | |
7397 | For output to files, if the above procedure does not specify a coding system, | |
7398 | the value of `buffer-file-coding-system' is used. */); | |
4ed46869 KH |
7399 | Vcoding_system_for_write = Qnil; |
7400 | ||
7401 | DEFVAR_LISP ("last-coding-system-used", &Vlast_coding_system_used, | |
48b0f3ae | 7402 | doc: /* Coding system used in the latest file or process I/O. */); |
4ed46869 KH |
7403 | Vlast_coding_system_used = Qnil; |
7404 | ||
9ce27fde | 7405 | DEFVAR_BOOL ("inhibit-eol-conversion", &inhibit_eol_conversion, |
48b0f3ae PJ |
7406 | doc: /* *Non-nil means always inhibit code conversion of end-of-line format. |
7407 | See info node `Coding Systems' and info node `Text and Binary' concerning | |
7408 | such conversion. */); | |
9ce27fde KH |
7409 | inhibit_eol_conversion = 0; |
7410 | ||
ed29121d | 7411 | DEFVAR_BOOL ("inherit-process-coding-system", &inherit_process_coding_system, |
48b0f3ae PJ |
7412 | doc: /* Non-nil means process buffer inherits coding system of process output. |
7413 | Bind it to t if the process output is to be treated as if it were a file | |
7414 | read from some filesystem. */); | |
ed29121d EZ |
7415 | inherit_process_coding_system = 0; |
7416 | ||
02ba4723 | 7417 | DEFVAR_LISP ("file-coding-system-alist", &Vfile_coding_system_alist, |
48b0f3ae PJ |
7418 | doc: /* Alist to decide a coding system to use for a file I/O operation. |
7419 | The format is ((PATTERN . VAL) ...), | |
7420 | where PATTERN is a regular expression matching a file name, | |
7421 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
7422 | If VAL is a coding system, it is used for both decoding and encoding | |
7423 | the file contents. | |
7424 | If VAL is a cons of coding systems, the car part is used for decoding, | |
7425 | and the cdr part is used for encoding. | |
7426 | If VAL is a function symbol, the function must return a coding system | |
0192762c | 7427 | or a cons of coding systems which are used as above. The function gets |
ff955d90 | 7428 | the arguments with which `find-operation-coding-system' was called. |
48b0f3ae PJ |
7429 | |
7430 | See also the function `find-operation-coding-system' | |
7431 | and the variable `auto-coding-alist'. */); | |
02ba4723 KH |
7432 | Vfile_coding_system_alist = Qnil; |
7433 | ||
7434 | DEFVAR_LISP ("process-coding-system-alist", &Vprocess_coding_system_alist, | |
48b0f3ae PJ |
7435 | doc: /* Alist to decide a coding system to use for a process I/O operation. |
7436 | The format is ((PATTERN . VAL) ...), | |
7437 | where PATTERN is a regular expression matching a program name, | |
7438 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
7439 | If VAL is a coding system, it is used for both decoding what received | |
7440 | from the program and encoding what sent to the program. | |
7441 | If VAL is a cons of coding systems, the car part is used for decoding, | |
7442 | and the cdr part is used for encoding. | |
7443 | If VAL is a function symbol, the function must return a coding system | |
7444 | or a cons of coding systems which are used as above. | |
7445 | ||
7446 | See also the function `find-operation-coding-system'. */); | |
02ba4723 KH |
7447 | Vprocess_coding_system_alist = Qnil; |
7448 | ||
7449 | DEFVAR_LISP ("network-coding-system-alist", &Vnetwork_coding_system_alist, | |
48b0f3ae PJ |
7450 | doc: /* Alist to decide a coding system to use for a network I/O operation. |
7451 | The format is ((PATTERN . VAL) ...), | |
7452 | where PATTERN is a regular expression matching a network service name | |
7453 | or is a port number to connect to, | |
7454 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
7455 | If VAL is a coding system, it is used for both decoding what received | |
7456 | from the network stream and encoding what sent to the network stream. | |
7457 | If VAL is a cons of coding systems, the car part is used for decoding, | |
7458 | and the cdr part is used for encoding. | |
7459 | If VAL is a function symbol, the function must return a coding system | |
7460 | or a cons of coding systems which are used as above. | |
7461 | ||
7462 | See also the function `find-operation-coding-system'. */); | |
02ba4723 | 7463 | Vnetwork_coding_system_alist = Qnil; |
4ed46869 | 7464 | |
68c45bf0 | 7465 | DEFVAR_LISP ("locale-coding-system", &Vlocale_coding_system, |
75205970 RS |
7466 | doc: /* Coding system to use with system messages. |
7467 | Also used for decoding keyboard input on X Window system. */); | |
68c45bf0 PE |
7468 | Vlocale_coding_system = Qnil; |
7469 | ||
005f0d35 | 7470 | /* The eol mnemonics are reset in startup.el system-dependently. */ |
7722baf9 | 7471 | DEFVAR_LISP ("eol-mnemonic-unix", &eol_mnemonic_unix, |
48b0f3ae | 7472 | doc: /* *String displayed in mode line for UNIX-like (LF) end-of-line format. */); |
7722baf9 | 7473 | eol_mnemonic_unix = build_string (":"); |
4ed46869 | 7474 | |
7722baf9 | 7475 | DEFVAR_LISP ("eol-mnemonic-dos", &eol_mnemonic_dos, |
48b0f3ae | 7476 | doc: /* *String displayed in mode line for DOS-like (CRLF) end-of-line format. */); |
7722baf9 | 7477 | eol_mnemonic_dos = build_string ("\\"); |
4ed46869 | 7478 | |
7722baf9 | 7479 | DEFVAR_LISP ("eol-mnemonic-mac", &eol_mnemonic_mac, |
48b0f3ae | 7480 | doc: /* *String displayed in mode line for MAC-like (CR) end-of-line format. */); |
7722baf9 | 7481 | eol_mnemonic_mac = build_string ("/"); |
4ed46869 | 7482 | |
7722baf9 | 7483 | DEFVAR_LISP ("eol-mnemonic-undecided", &eol_mnemonic_undecided, |
48b0f3ae | 7484 | doc: /* *String displayed in mode line when end-of-line format is not yet determined. */); |
7722baf9 | 7485 | eol_mnemonic_undecided = build_string (":"); |
4ed46869 | 7486 | |
84fbb8a0 | 7487 | DEFVAR_LISP ("enable-character-translation", &Venable_character_translation, |
48b0f3ae | 7488 | doc: /* *Non-nil enables character translation while encoding and decoding. */); |
84fbb8a0 | 7489 | Venable_character_translation = Qt; |
bdd9fb48 | 7490 | |
f967223b | 7491 | DEFVAR_LISP ("standard-translation-table-for-decode", |
48b0f3ae PJ |
7492 | &Vstandard_translation_table_for_decode, |
7493 | doc: /* Table for translating characters while decoding. */); | |
f967223b | 7494 | Vstandard_translation_table_for_decode = Qnil; |
bdd9fb48 | 7495 | |
f967223b | 7496 | DEFVAR_LISP ("standard-translation-table-for-encode", |
48b0f3ae PJ |
7497 | &Vstandard_translation_table_for_encode, |
7498 | doc: /* Table for translating characters while encoding. */); | |
f967223b | 7499 | Vstandard_translation_table_for_encode = Qnil; |
4ed46869 KH |
7500 | |
7501 | DEFVAR_LISP ("charset-revision-table", &Vcharset_revision_alist, | |
48b0f3ae PJ |
7502 | doc: /* Alist of charsets vs revision numbers. |
7503 | While encoding, if a charset (car part of an element) is found, | |
7504 | designate it with the escape sequence identifying revision (cdr part of the element). */); | |
4ed46869 | 7505 | Vcharset_revision_alist = Qnil; |
02ba4723 KH |
7506 | |
7507 | DEFVAR_LISP ("default-process-coding-system", | |
7508 | &Vdefault_process_coding_system, | |
48b0f3ae PJ |
7509 | doc: /* Cons of coding systems used for process I/O by default. |
7510 | The car part is used for decoding a process output, | |
7511 | the cdr part is used for encoding a text to be sent to a process. */); | |
02ba4723 | 7512 | Vdefault_process_coding_system = Qnil; |
c4825358 | 7513 | |
3f003981 | 7514 | DEFVAR_LISP ("latin-extra-code-table", &Vlatin_extra_code_table, |
48b0f3ae PJ |
7515 | doc: /* Table of extra Latin codes in the range 128..159 (inclusive). |
7516 | This is a vector of length 256. | |
7517 | If Nth element is non-nil, the existence of code N in a file | |
7518 | \(or output of subprocess) doesn't prevent it to be detected as | |
7519 | a coding system of ISO 2022 variant which has a flag | |
7520 | `accept-latin-extra-code' t (e.g. iso-latin-1) on reading a file | |
7521 | or reading output of a subprocess. | |
7522 | Only 128th through 159th elements has a meaning. */); | |
3f003981 | 7523 | Vlatin_extra_code_table = Fmake_vector (make_number (256), Qnil); |
d46c5b12 KH |
7524 | |
7525 | DEFVAR_LISP ("select-safe-coding-system-function", | |
7526 | &Vselect_safe_coding_system_function, | |
48b0f3ae PJ |
7527 | doc: /* Function to call to select safe coding system for encoding a text. |
7528 | ||
7529 | If set, this function is called to force a user to select a proper | |
7530 | coding system which can encode the text in the case that a default | |
7531 | coding system used in each operation can't encode the text. | |
7532 | ||
7533 | The default value is `select-safe-coding-system' (which see). */); | |
d46c5b12 KH |
7534 | Vselect_safe_coding_system_function = Qnil; |
7535 | ||
5d5bf4d8 KH |
7536 | DEFVAR_BOOL ("coding-system-require-warning", |
7537 | &coding_system_require_warning, | |
7538 | doc: /* Internal use only. | |
7539 | If non-nil, on writing a file, select-safe-coding-system-function is | |
7540 | called even if coding-system-for-write is non-nil. The command | |
7541 | universal-coding-system-argument binds this variable to t temporarily. */); | |
7542 | coding_system_require_warning = 0; | |
7543 | ||
7544 | ||
05e6f5dc | 7545 | DEFVAR_LISP ("char-coding-system-table", &Vchar_coding_system_table, |
48b0f3ae PJ |
7546 | doc: /* Char-table containing safe coding systems of each characters. |
7547 | Each element doesn't include such generic coding systems that can | |
5f90b4fb | 7548 | encode any characters. They are in the first extra slot. */); |
05e6f5dc KH |
7549 | Vchar_coding_system_table = Fmake_char_table (Qchar_coding_system, Qnil); |
7550 | ||
22ab2303 | 7551 | DEFVAR_BOOL ("inhibit-iso-escape-detection", |
74383408 | 7552 | &inhibit_iso_escape_detection, |
48b0f3ae PJ |
7553 | doc: /* If non-nil, Emacs ignores ISO2022's escape sequence on code detection. |
7554 | ||
7555 | By default, on reading a file, Emacs tries to detect how the text is | |
7556 | encoded. This code detection is sensitive to escape sequences. If | |
7557 | the sequence is valid as ISO2022, the code is determined as one of | |
7558 | the ISO2022 encodings, and the file is decoded by the corresponding | |
7559 | coding system (e.g. `iso-2022-7bit'). | |
7560 | ||
7561 | However, there may be a case that you want to read escape sequences in | |
7562 | a file as is. In such a case, you can set this variable to non-nil. | |
7563 | Then, as the code detection ignores any escape sequences, no file is | |
7564 | detected as encoded in some ISO2022 encoding. The result is that all | |
7565 | escape sequences become visible in a buffer. | |
7566 | ||
7567 | The default value is nil, and it is strongly recommended not to change | |
7568 | it. That is because many Emacs Lisp source files that contain | |
7569 | non-ASCII characters are encoded by the coding system `iso-2022-7bit' | |
7570 | in Emacs's distribution, and they won't be decoded correctly on | |
7571 | reading if you suppress escape sequence detection. | |
7572 | ||
7573 | The other way to read escape sequences in a file without decoding is | |
7574 | to explicitly specify some coding system that doesn't use ISO2022's | |
7575 | escape sequence (e.g `latin-1') on reading by \\[universal-coding-system-argument]. */); | |
74383408 | 7576 | inhibit_iso_escape_detection = 0; |
002fdb44 DL |
7577 | |
7578 | DEFVAR_LISP ("translation-table-for-input", &Vtranslation_table_for_input, | |
15c8f9d1 DL |
7579 | doc: /* Char table for translating self-inserting characters. |
7580 | This is applied to the result of input methods, not their input. See also | |
7581 | `keyboard-translate-table'. */); | |
002fdb44 | 7582 | Vtranslation_table_for_input = Qnil; |
4ed46869 KH |
7583 | } |
7584 | ||
68c45bf0 PE |
7585 | char * |
7586 | emacs_strerror (error_number) | |
7587 | int error_number; | |
7588 | { | |
7589 | char *str; | |
7590 | ||
ca9c0567 | 7591 | synchronize_system_messages_locale (); |
68c45bf0 PE |
7592 | str = strerror (error_number); |
7593 | ||
7594 | if (! NILP (Vlocale_coding_system)) | |
7595 | { | |
7596 | Lisp_Object dec = code_convert_string_norecord (build_string (str), | |
7597 | Vlocale_coding_system, | |
7598 | 0); | |
d5db4077 | 7599 | str = (char *) SDATA (dec); |
68c45bf0 PE |
7600 | } |
7601 | ||
7602 | return str; | |
7603 | } | |
7604 | ||
4ed46869 | 7605 | #endif /* emacs */ |
c2f94ebc | 7606 |