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4ed46869 | 1 | /* Coding system handler (conversion, detection, and etc). |
0b5538bd | 2 | Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. |
ce03bf76 KH |
3 | Copyright (C) 1995, 1997, 1998, 2002, 2003, 2004, 2005 |
4 | National Institute of Advanced Industrial Science and Technology (AIST) | |
5 | Registration Number H14PRO021 | |
4ed46869 | 6 | |
369314dc KH |
7 | This file is part of GNU Emacs. |
8 | ||
9 | GNU Emacs is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2, or (at your option) | |
12 | any later version. | |
4ed46869 | 13 | |
369314dc KH |
14 | GNU Emacs is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
4ed46869 | 18 | |
369314dc KH |
19 | You should have received a copy of the GNU General Public License |
20 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
21 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
22 | Boston, MA 02110-1301, USA. */ | |
4ed46869 KH |
23 | |
24 | /*** TABLE OF CONTENTS *** | |
25 | ||
b73bfc1c | 26 | 0. General comments |
4ed46869 | 27 | 1. Preamble |
0ef69138 | 28 | 2. Emacs' internal format (emacs-mule) handlers |
4ed46869 KH |
29 | 3. ISO2022 handlers |
30 | 4. Shift-JIS and BIG5 handlers | |
1397dc18 KH |
31 | 5. CCL handlers |
32 | 6. End-of-line handlers | |
33 | 7. C library functions | |
34 | 8. Emacs Lisp library functions | |
35 | 9. Post-amble | |
4ed46869 KH |
36 | |
37 | */ | |
38 | ||
b73bfc1c KH |
39 | /*** 0. General comments ***/ |
40 | ||
41 | ||
cfb43547 | 42 | /*** GENERAL NOTE on CODING SYSTEMS *** |
4ed46869 | 43 | |
cfb43547 | 44 | A coding system is an encoding mechanism for one or more character |
4ed46869 KH |
45 | sets. Here's a list of coding systems which Emacs can handle. When |
46 | we say "decode", it means converting some other coding system to | |
cfb43547 | 47 | Emacs' internal format (emacs-mule), and when we say "encode", |
0ef69138 KH |
48 | it means converting the coding system emacs-mule to some other |
49 | coding system. | |
4ed46869 | 50 | |
0ef69138 | 51 | 0. Emacs' internal format (emacs-mule) |
4ed46869 | 52 | |
cfb43547 | 53 | Emacs itself holds a multi-lingual character in buffers and strings |
f4dee582 | 54 | in a special format. Details are described in section 2. |
4ed46869 KH |
55 | |
56 | 1. ISO2022 | |
57 | ||
58 | The most famous coding system for multiple character sets. X's | |
f4dee582 RS |
59 | Compound Text, various EUCs (Extended Unix Code), and coding |
60 | systems used in Internet communication such as ISO-2022-JP are | |
61 | all variants of ISO2022. Details are described in section 3. | |
4ed46869 KH |
62 | |
63 | 2. SJIS (or Shift-JIS or MS-Kanji-Code) | |
93dec019 | 64 | |
4ed46869 KH |
65 | A coding system to encode character sets: ASCII, JISX0201, and |
66 | JISX0208. Widely used for PC's in Japan. Details are described in | |
f4dee582 | 67 | section 4. |
4ed46869 KH |
68 | |
69 | 3. BIG5 | |
70 | ||
cfb43547 DL |
71 | A coding system to encode the character sets ASCII and Big5. Widely |
72 | used for Chinese (mainly in Taiwan and Hong Kong). Details are | |
f4dee582 RS |
73 | described in section 4. In this file, when we write "BIG5" |
74 | (all uppercase), we mean the coding system, and when we write | |
75 | "Big5" (capitalized), we mean the character set. | |
4ed46869 | 76 | |
27901516 KH |
77 | 4. Raw text |
78 | ||
cfb43547 DL |
79 | A coding system for text containing random 8-bit code. Emacs does |
80 | no code conversion on such text except for end-of-line format. | |
27901516 KH |
81 | |
82 | 5. Other | |
4ed46869 | 83 | |
cfb43547 DL |
84 | If a user wants to read/write text encoded in a coding system not |
85 | listed above, he can supply a decoder and an encoder for it as CCL | |
4ed46869 KH |
86 | (Code Conversion Language) programs. Emacs executes the CCL program |
87 | while reading/writing. | |
88 | ||
d46c5b12 KH |
89 | Emacs represents a coding system by a Lisp symbol that has a property |
90 | `coding-system'. But, before actually using the coding system, the | |
4ed46869 | 91 | information about it is set in a structure of type `struct |
f4dee582 | 92 | coding_system' for rapid processing. See section 6 for more details. |
4ed46869 KH |
93 | |
94 | */ | |
95 | ||
96 | /*** GENERAL NOTES on END-OF-LINE FORMAT *** | |
97 | ||
cfb43547 DL |
98 | How end-of-line of text is encoded depends on the operating system. |
99 | For instance, Unix's format is just one byte of `line-feed' code, | |
f4dee582 | 100 | whereas DOS's format is two-byte sequence of `carriage-return' and |
d46c5b12 KH |
101 | `line-feed' codes. MacOS's format is usually one byte of |
102 | `carriage-return'. | |
4ed46869 | 103 | |
cfb43547 DL |
104 | Since text character encoding and end-of-line encoding are |
105 | independent, any coding system described above can have any | |
106 | end-of-line format. So Emacs has information about end-of-line | |
107 | format in each coding-system. See section 6 for more details. | |
4ed46869 KH |
108 | |
109 | */ | |
110 | ||
111 | /*** GENERAL NOTES on `detect_coding_XXX ()' functions *** | |
112 | ||
113 | These functions check if a text between SRC and SRC_END is encoded | |
114 | in the coding system category XXX. Each returns an integer value in | |
cfb43547 | 115 | which appropriate flag bits for the category XXX are set. The flag |
4ed46869 | 116 | bits are defined in macros CODING_CATEGORY_MASK_XXX. Below is the |
cfb43547 | 117 | template for these functions. If MULTIBYTEP is nonzero, 8-bit codes |
0a28aafb | 118 | of the range 0x80..0x9F are in multibyte form. */ |
4ed46869 KH |
119 | #if 0 |
120 | int | |
0a28aafb | 121 | detect_coding_emacs_mule (src, src_end, multibytep) |
4ed46869 | 122 | unsigned char *src, *src_end; |
0a28aafb | 123 | int multibytep; |
4ed46869 KH |
124 | { |
125 | ... | |
126 | } | |
127 | #endif | |
128 | ||
129 | /*** GENERAL NOTES on `decode_coding_XXX ()' functions *** | |
130 | ||
b73bfc1c KH |
131 | These functions decode SRC_BYTES length of unibyte text at SOURCE |
132 | encoded in CODING to Emacs' internal format. The resulting | |
133 | multibyte text goes to a place pointed to by DESTINATION, the length | |
134 | of which should not exceed DST_BYTES. | |
d46c5b12 | 135 | |
cfb43547 DL |
136 | These functions set the information about original and decoded texts |
137 | in the members `produced', `produced_char', `consumed', and | |
138 | `consumed_char' of the structure *CODING. They also set the member | |
139 | `result' to one of CODING_FINISH_XXX indicating how the decoding | |
140 | finished. | |
d46c5b12 | 141 | |
cfb43547 | 142 | DST_BYTES zero means that the source area and destination area are |
d46c5b12 | 143 | overlapped, which means that we can produce a decoded text until it |
cfb43547 | 144 | reaches the head of the not-yet-decoded source text. |
d46c5b12 | 145 | |
cfb43547 | 146 | Below is a template for these functions. */ |
4ed46869 | 147 | #if 0 |
b73bfc1c | 148 | static void |
d46c5b12 | 149 | decode_coding_XXX (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 150 | struct coding_system *coding; |
5bdca8af DN |
151 | const unsigned char *source; |
152 | unsigned char *destination; | |
4ed46869 | 153 | int src_bytes, dst_bytes; |
4ed46869 KH |
154 | { |
155 | ... | |
156 | } | |
157 | #endif | |
158 | ||
159 | /*** GENERAL NOTES on `encode_coding_XXX ()' functions *** | |
160 | ||
cfb43547 | 161 | These functions encode SRC_BYTES length text at SOURCE from Emacs' |
b73bfc1c KH |
162 | internal multibyte format to CODING. The resulting unibyte text |
163 | goes to a place pointed to by DESTINATION, the length of which | |
164 | should not exceed DST_BYTES. | |
d46c5b12 | 165 | |
cfb43547 DL |
166 | These functions set the information about original and encoded texts |
167 | in the members `produced', `produced_char', `consumed', and | |
168 | `consumed_char' of the structure *CODING. They also set the member | |
169 | `result' to one of CODING_FINISH_XXX indicating how the encoding | |
170 | finished. | |
d46c5b12 | 171 | |
cfb43547 DL |
172 | DST_BYTES zero means that the source area and destination area are |
173 | overlapped, which means that we can produce encoded text until it | |
174 | reaches at the head of the not-yet-encoded source text. | |
d46c5b12 | 175 | |
cfb43547 | 176 | Below is a template for these functions. */ |
4ed46869 | 177 | #if 0 |
b73bfc1c | 178 | static void |
d46c5b12 | 179 | encode_coding_XXX (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 KH |
180 | struct coding_system *coding; |
181 | unsigned char *source, *destination; | |
182 | int src_bytes, dst_bytes; | |
4ed46869 KH |
183 | { |
184 | ... | |
185 | } | |
186 | #endif | |
187 | ||
188 | /*** COMMONLY USED MACROS ***/ | |
189 | ||
b73bfc1c KH |
190 | /* The following two macros ONE_MORE_BYTE and TWO_MORE_BYTES safely |
191 | get one, two, and three bytes from the source text respectively. | |
192 | If there are not enough bytes in the source, they jump to | |
193 | `label_end_of_loop'. The caller should set variables `coding', | |
194 | `src' and `src_end' to appropriate pointer in advance. These | |
195 | macros are called from decoding routines `decode_coding_XXX', thus | |
196 | it is assumed that the source text is unibyte. */ | |
4ed46869 | 197 | |
b73bfc1c KH |
198 | #define ONE_MORE_BYTE(c1) \ |
199 | do { \ | |
200 | if (src >= src_end) \ | |
201 | { \ | |
202 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
203 | goto label_end_of_loop; \ | |
204 | } \ | |
205 | c1 = *src++; \ | |
4ed46869 KH |
206 | } while (0) |
207 | ||
b73bfc1c KH |
208 | #define TWO_MORE_BYTES(c1, c2) \ |
209 | do { \ | |
210 | if (src + 1 >= src_end) \ | |
211 | { \ | |
212 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
213 | goto label_end_of_loop; \ | |
214 | } \ | |
215 | c1 = *src++; \ | |
216 | c2 = *src++; \ | |
4ed46869 KH |
217 | } while (0) |
218 | ||
4ed46869 | 219 | |
0a28aafb KH |
220 | /* Like ONE_MORE_BYTE, but 8-bit bytes of data at SRC are in multibyte |
221 | form if MULTIBYTEP is nonzero. */ | |
222 | ||
223 | #define ONE_MORE_BYTE_CHECK_MULTIBYTE(c1, multibytep) \ | |
224 | do { \ | |
225 | if (src >= src_end) \ | |
226 | { \ | |
227 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
228 | goto label_end_of_loop; \ | |
229 | } \ | |
230 | c1 = *src++; \ | |
231 | if (multibytep && c1 == LEADING_CODE_8_BIT_CONTROL) \ | |
232 | c1 = *src++ - 0x20; \ | |
233 | } while (0) | |
234 | ||
b73bfc1c KH |
235 | /* Set C to the next character at the source text pointed by `src'. |
236 | If there are not enough characters in the source, jump to | |
237 | `label_end_of_loop'. The caller should set variables `coding' | |
238 | `src', `src_end', and `translation_table' to appropriate pointers | |
239 | in advance. This macro is used in encoding routines | |
240 | `encode_coding_XXX', thus it assumes that the source text is in | |
241 | multibyte form except for 8-bit characters. 8-bit characters are | |
242 | in multibyte form if coding->src_multibyte is nonzero, else they | |
243 | are represented by a single byte. */ | |
4ed46869 | 244 | |
b73bfc1c KH |
245 | #define ONE_MORE_CHAR(c) \ |
246 | do { \ | |
247 | int len = src_end - src; \ | |
248 | int bytes; \ | |
249 | if (len <= 0) \ | |
250 | { \ | |
251 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; \ | |
252 | goto label_end_of_loop; \ | |
253 | } \ | |
254 | if (coding->src_multibyte \ | |
255 | || UNIBYTE_STR_AS_MULTIBYTE_P (src, len, bytes)) \ | |
256 | c = STRING_CHAR_AND_LENGTH (src, len, bytes); \ | |
257 | else \ | |
258 | c = *src, bytes = 1; \ | |
259 | if (!NILP (translation_table)) \ | |
39658efc | 260 | c = translate_char (translation_table, c, -1, 0, 0); \ |
b73bfc1c | 261 | src += bytes; \ |
4ed46869 KH |
262 | } while (0) |
263 | ||
4ed46869 | 264 | |
8ca3766a | 265 | /* Produce a multibyte form of character C to `dst'. Jump to |
b73bfc1c KH |
266 | `label_end_of_loop' if there's not enough space at `dst'. |
267 | ||
cfb43547 | 268 | If we are now in the middle of a composition sequence, the decoded |
b73bfc1c KH |
269 | character may be ALTCHAR (for the current composition). In that |
270 | case, the character goes to coding->cmp_data->data instead of | |
271 | `dst'. | |
272 | ||
273 | This macro is used in decoding routines. */ | |
274 | ||
275 | #define EMIT_CHAR(c) \ | |
4ed46869 | 276 | do { \ |
b73bfc1c KH |
277 | if (! COMPOSING_P (coding) \ |
278 | || coding->composing == COMPOSITION_RELATIVE \ | |
279 | || coding->composing == COMPOSITION_WITH_RULE) \ | |
280 | { \ | |
281 | int bytes = CHAR_BYTES (c); \ | |
282 | if ((dst + bytes) > (dst_bytes ? dst_end : src)) \ | |
283 | { \ | |
284 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
285 | goto label_end_of_loop; \ | |
286 | } \ | |
287 | dst += CHAR_STRING (c, dst); \ | |
288 | coding->produced_char++; \ | |
289 | } \ | |
ec6d2bb8 | 290 | \ |
b73bfc1c KH |
291 | if (COMPOSING_P (coding) \ |
292 | && coding->composing != COMPOSITION_RELATIVE) \ | |
293 | { \ | |
294 | CODING_ADD_COMPOSITION_COMPONENT (coding, c); \ | |
295 | coding->composition_rule_follows \ | |
296 | = coding->composing != COMPOSITION_WITH_ALTCHARS; \ | |
297 | } \ | |
4ed46869 KH |
298 | } while (0) |
299 | ||
4ed46869 | 300 | |
b73bfc1c KH |
301 | #define EMIT_ONE_BYTE(c) \ |
302 | do { \ | |
303 | if (dst >= (dst_bytes ? dst_end : src)) \ | |
304 | { \ | |
305 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
306 | goto label_end_of_loop; \ | |
307 | } \ | |
308 | *dst++ = c; \ | |
309 | } while (0) | |
310 | ||
311 | #define EMIT_TWO_BYTES(c1, c2) \ | |
312 | do { \ | |
313 | if (dst + 2 > (dst_bytes ? dst_end : src)) \ | |
314 | { \ | |
315 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
316 | goto label_end_of_loop; \ | |
317 | } \ | |
318 | *dst++ = c1, *dst++ = c2; \ | |
319 | } while (0) | |
320 | ||
321 | #define EMIT_BYTES(from, to) \ | |
322 | do { \ | |
323 | if (dst + (to - from) > (dst_bytes ? dst_end : src)) \ | |
324 | { \ | |
325 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
326 | goto label_end_of_loop; \ | |
327 | } \ | |
328 | while (from < to) \ | |
329 | *dst++ = *from++; \ | |
4ed46869 KH |
330 | } while (0) |
331 | ||
332 | \f | |
333 | /*** 1. Preamble ***/ | |
334 | ||
68c45bf0 PE |
335 | #ifdef emacs |
336 | #include <config.h> | |
337 | #endif | |
338 | ||
4ed46869 KH |
339 | #include <stdio.h> |
340 | ||
341 | #ifdef emacs | |
342 | ||
4ed46869 KH |
343 | #include "lisp.h" |
344 | #include "buffer.h" | |
345 | #include "charset.h" | |
ec6d2bb8 | 346 | #include "composite.h" |
4ed46869 KH |
347 | #include "ccl.h" |
348 | #include "coding.h" | |
349 | #include "window.h" | |
66638433 | 350 | #include "intervals.h" |
b8299c66 KL |
351 | #include "frame.h" |
352 | #include "termhooks.h" | |
4ed46869 KH |
353 | |
354 | #else /* not emacs */ | |
355 | ||
356 | #include "mulelib.h" | |
357 | ||
358 | #endif /* not emacs */ | |
359 | ||
360 | Lisp_Object Qcoding_system, Qeol_type; | |
361 | Lisp_Object Qbuffer_file_coding_system; | |
362 | Lisp_Object Qpost_read_conversion, Qpre_write_conversion; | |
27901516 | 363 | Lisp_Object Qno_conversion, Qundecided; |
bb0115a2 | 364 | Lisp_Object Qcoding_system_history; |
05e6f5dc | 365 | Lisp_Object Qsafe_chars; |
1397dc18 | 366 | Lisp_Object Qvalid_codes; |
4ed46869 KH |
367 | |
368 | extern Lisp_Object Qinsert_file_contents, Qwrite_region; | |
387f6ba5 | 369 | Lisp_Object Qcall_process, Qcall_process_region; |
4ed46869 KH |
370 | Lisp_Object Qstart_process, Qopen_network_stream; |
371 | Lisp_Object Qtarget_idx; | |
372 | ||
a362520d KH |
373 | /* If a symbol has this property, evaluate the value to define the |
374 | symbol as a coding system. */ | |
375 | Lisp_Object Qcoding_system_define_form; | |
376 | ||
d46c5b12 KH |
377 | Lisp_Object Vselect_safe_coding_system_function; |
378 | ||
5d5bf4d8 KH |
379 | int coding_system_require_warning; |
380 | ||
7722baf9 EZ |
381 | /* Mnemonic string for each format of end-of-line. */ |
382 | Lisp_Object eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac; | |
383 | /* Mnemonic string to indicate format of end-of-line is not yet | |
4ed46869 | 384 | decided. */ |
7722baf9 | 385 | Lisp_Object eol_mnemonic_undecided; |
4ed46869 | 386 | |
9ce27fde KH |
387 | /* Format of end-of-line decided by system. This is CODING_EOL_LF on |
388 | Unix, CODING_EOL_CRLF on DOS/Windows, and CODING_EOL_CR on Mac. */ | |
389 | int system_eol_type; | |
390 | ||
4ed46869 KH |
391 | #ifdef emacs |
392 | ||
6b89e3aa KH |
393 | /* Information about which coding system is safe for which chars. |
394 | The value has the form (GENERIC-LIST . NON-GENERIC-ALIST). | |
395 | ||
396 | GENERIC-LIST is a list of generic coding systems which can encode | |
397 | any characters. | |
398 | ||
399 | NON-GENERIC-ALIST is an alist of non generic coding systems vs the | |
400 | corresponding char table that contains safe chars. */ | |
401 | Lisp_Object Vcoding_system_safe_chars; | |
402 | ||
4608c386 KH |
403 | Lisp_Object Vcoding_system_list, Vcoding_system_alist; |
404 | ||
405 | Lisp_Object Qcoding_system_p, Qcoding_system_error; | |
4ed46869 | 406 | |
d46c5b12 KH |
407 | /* Coding system emacs-mule and raw-text are for converting only |
408 | end-of-line format. */ | |
409 | Lisp_Object Qemacs_mule, Qraw_text; | |
9ce27fde | 410 | |
ecf488bc DL |
411 | Lisp_Object Qutf_8; |
412 | ||
4ed46869 KH |
413 | /* Coding-systems are handed between Emacs Lisp programs and C internal |
414 | routines by the following three variables. */ | |
415 | /* Coding-system for reading files and receiving data from process. */ | |
416 | Lisp_Object Vcoding_system_for_read; | |
417 | /* Coding-system for writing files and sending data to process. */ | |
418 | Lisp_Object Vcoding_system_for_write; | |
419 | /* Coding-system actually used in the latest I/O. */ | |
420 | Lisp_Object Vlast_coding_system_used; | |
421 | ||
c4825358 | 422 | /* A vector of length 256 which contains information about special |
94487c4e | 423 | Latin codes (especially for dealing with Microsoft codes). */ |
3f003981 | 424 | Lisp_Object Vlatin_extra_code_table; |
c4825358 | 425 | |
9ce27fde KH |
426 | /* Flag to inhibit code conversion of end-of-line format. */ |
427 | int inhibit_eol_conversion; | |
428 | ||
74383408 KH |
429 | /* Flag to inhibit ISO2022 escape sequence detection. */ |
430 | int inhibit_iso_escape_detection; | |
431 | ||
ed29121d EZ |
432 | /* Flag to make buffer-file-coding-system inherit from process-coding. */ |
433 | int inherit_process_coding_system; | |
434 | ||
c4825358 KH |
435 | /* Coding system to be used to encode text for terminal display when |
436 | terminal coding system is nil. */ | |
437 | struct coding_system safe_terminal_coding; | |
438 | ||
6bc51348 KH |
439 | /* Default coding system to be used to write a file. */ |
440 | struct coding_system default_buffer_file_coding; | |
441 | ||
02ba4723 KH |
442 | Lisp_Object Vfile_coding_system_alist; |
443 | Lisp_Object Vprocess_coding_system_alist; | |
444 | Lisp_Object Vnetwork_coding_system_alist; | |
4ed46869 | 445 | |
68c45bf0 PE |
446 | Lisp_Object Vlocale_coding_system; |
447 | ||
4ed46869 KH |
448 | #endif /* emacs */ |
449 | ||
d46c5b12 | 450 | Lisp_Object Qcoding_category, Qcoding_category_index; |
4ed46869 KH |
451 | |
452 | /* List of symbols `coding-category-xxx' ordered by priority. */ | |
453 | Lisp_Object Vcoding_category_list; | |
454 | ||
d46c5b12 KH |
455 | /* Table of coding categories (Lisp symbols). */ |
456 | Lisp_Object Vcoding_category_table; | |
4ed46869 KH |
457 | |
458 | /* Table of names of symbol for each coding-category. */ | |
459 | char *coding_category_name[CODING_CATEGORY_IDX_MAX] = { | |
0ef69138 | 460 | "coding-category-emacs-mule", |
4ed46869 KH |
461 | "coding-category-sjis", |
462 | "coding-category-iso-7", | |
d46c5b12 | 463 | "coding-category-iso-7-tight", |
4ed46869 KH |
464 | "coding-category-iso-8-1", |
465 | "coding-category-iso-8-2", | |
7717c392 KH |
466 | "coding-category-iso-7-else", |
467 | "coding-category-iso-8-else", | |
89fa8b36 | 468 | "coding-category-ccl", |
4ed46869 | 469 | "coding-category-big5", |
fa42c37f KH |
470 | "coding-category-utf-8", |
471 | "coding-category-utf-16-be", | |
472 | "coding-category-utf-16-le", | |
27901516 | 473 | "coding-category-raw-text", |
89fa8b36 | 474 | "coding-category-binary" |
4ed46869 KH |
475 | }; |
476 | ||
66cfb530 | 477 | /* Table of pointers to coding systems corresponding to each coding |
d46c5b12 KH |
478 | categories. */ |
479 | struct coding_system *coding_system_table[CODING_CATEGORY_IDX_MAX]; | |
480 | ||
66cfb530 | 481 | /* Table of coding category masks. Nth element is a mask for a coding |
8ca3766a | 482 | category of which priority is Nth. */ |
66cfb530 KH |
483 | static |
484 | int coding_priorities[CODING_CATEGORY_IDX_MAX]; | |
485 | ||
f967223b KH |
486 | /* Flag to tell if we look up translation table on character code |
487 | conversion. */ | |
84fbb8a0 | 488 | Lisp_Object Venable_character_translation; |
f967223b KH |
489 | /* Standard translation table to look up on decoding (reading). */ |
490 | Lisp_Object Vstandard_translation_table_for_decode; | |
491 | /* Standard translation table to look up on encoding (writing). */ | |
492 | Lisp_Object Vstandard_translation_table_for_encode; | |
84fbb8a0 | 493 | |
f967223b KH |
494 | Lisp_Object Qtranslation_table; |
495 | Lisp_Object Qtranslation_table_id; | |
496 | Lisp_Object Qtranslation_table_for_decode; | |
497 | Lisp_Object Qtranslation_table_for_encode; | |
4ed46869 KH |
498 | |
499 | /* Alist of charsets vs revision number. */ | |
500 | Lisp_Object Vcharset_revision_alist; | |
501 | ||
02ba4723 KH |
502 | /* Default coding systems used for process I/O. */ |
503 | Lisp_Object Vdefault_process_coding_system; | |
504 | ||
002fdb44 DL |
505 | /* Char table for translating Quail and self-inserting input. */ |
506 | Lisp_Object Vtranslation_table_for_input; | |
507 | ||
b843d1ae KH |
508 | /* Global flag to tell that we can't call post-read-conversion and |
509 | pre-write-conversion functions. Usually the value is zero, but it | |
510 | is set to 1 temporarily while such functions are running. This is | |
511 | to avoid infinite recursive call. */ | |
512 | static int inhibit_pre_post_conversion; | |
513 | ||
05e6f5dc KH |
514 | Lisp_Object Qchar_coding_system; |
515 | ||
6b89e3aa KH |
516 | /* Return `safe-chars' property of CODING_SYSTEM (symbol). Don't check |
517 | its validity. */ | |
05e6f5dc KH |
518 | |
519 | Lisp_Object | |
6b89e3aa KH |
520 | coding_safe_chars (coding_system) |
521 | Lisp_Object coding_system; | |
05e6f5dc KH |
522 | { |
523 | Lisp_Object coding_spec, plist, safe_chars; | |
93dec019 | 524 | |
6b89e3aa | 525 | coding_spec = Fget (coding_system, Qcoding_system); |
05e6f5dc KH |
526 | plist = XVECTOR (coding_spec)->contents[3]; |
527 | safe_chars = Fplist_get (XVECTOR (coding_spec)->contents[3], Qsafe_chars); | |
528 | return (CHAR_TABLE_P (safe_chars) ? safe_chars : Qt); | |
529 | } | |
530 | ||
531 | #define CODING_SAFE_CHAR_P(safe_chars, c) \ | |
532 | (EQ (safe_chars, Qt) || !NILP (CHAR_TABLE_REF (safe_chars, c))) | |
533 | ||
4ed46869 | 534 | \f |
0ef69138 | 535 | /*** 2. Emacs internal format (emacs-mule) handlers ***/ |
4ed46869 | 536 | |
aa72b389 KH |
537 | /* Emacs' internal format for representation of multiple character |
538 | sets is a kind of multi-byte encoding, i.e. characters are | |
539 | represented by variable-length sequences of one-byte codes. | |
b73bfc1c KH |
540 | |
541 | ASCII characters and control characters (e.g. `tab', `newline') are | |
542 | represented by one-byte sequences which are their ASCII codes, in | |
543 | the range 0x00 through 0x7F. | |
544 | ||
545 | 8-bit characters of the range 0x80..0x9F are represented by | |
546 | two-byte sequences of LEADING_CODE_8_BIT_CONTROL and (their 8-bit | |
547 | code + 0x20). | |
548 | ||
549 | 8-bit characters of the range 0xA0..0xFF are represented by | |
550 | one-byte sequences which are their 8-bit code. | |
551 | ||
552 | The other characters are represented by a sequence of `base | |
553 | leading-code', optional `extended leading-code', and one or two | |
554 | `position-code's. The length of the sequence is determined by the | |
aa72b389 | 555 | base leading-code. Leading-code takes the range 0x81 through 0x9D, |
b73bfc1c KH |
556 | whereas extended leading-code and position-code take the range 0xA0 |
557 | through 0xFF. See `charset.h' for more details about leading-code | |
558 | and position-code. | |
f4dee582 | 559 | |
4ed46869 | 560 | --- CODE RANGE of Emacs' internal format --- |
b73bfc1c KH |
561 | character set range |
562 | ------------- ----- | |
563 | ascii 0x00..0x7F | |
564 | eight-bit-control LEADING_CODE_8_BIT_CONTROL + 0xA0..0xBF | |
565 | eight-bit-graphic 0xA0..0xBF | |
aa72b389 | 566 | ELSE 0x81..0x9D + [0xA0..0xFF]+ |
4ed46869 KH |
567 | --------------------------------------------- |
568 | ||
aa72b389 KH |
569 | As this is the internal character representation, the format is |
570 | usually not used externally (i.e. in a file or in a data sent to a | |
571 | process). But, it is possible to have a text externally in this | |
572 | format (i.e. by encoding by the coding system `emacs-mule'). | |
573 | ||
574 | In that case, a sequence of one-byte codes has a slightly different | |
575 | form. | |
576 | ||
ae5145c2 | 577 | Firstly, all characters in eight-bit-control are represented by |
aa72b389 KH |
578 | one-byte sequences which are their 8-bit code. |
579 | ||
580 | Next, character composition data are represented by the byte | |
581 | sequence of the form: 0x80 METHOD BYTES CHARS COMPONENT ..., | |
582 | where, | |
583 | METHOD is 0xF0 plus one of composition method (enum | |
584 | composition_method), | |
585 | ||
ae5145c2 | 586 | BYTES is 0xA0 plus the byte length of these composition data, |
aa72b389 | 587 | |
ae5145c2 | 588 | CHARS is 0xA0 plus the number of characters composed by these |
aa72b389 KH |
589 | data, |
590 | ||
8ca3766a | 591 | COMPONENTs are characters of multibyte form or composition |
aa72b389 KH |
592 | rules encoded by two-byte of ASCII codes. |
593 | ||
594 | In addition, for backward compatibility, the following formats are | |
595 | also recognized as composition data on decoding. | |
596 | ||
597 | 0x80 MSEQ ... | |
598 | 0x80 0xFF MSEQ RULE MSEQ RULE ... MSEQ | |
599 | ||
600 | Here, | |
601 | MSEQ is a multibyte form but in these special format: | |
602 | ASCII: 0xA0 ASCII_CODE+0x80, | |
603 | other: LEADING_CODE+0x20 FOLLOWING-BYTE ..., | |
604 | RULE is a one byte code of the range 0xA0..0xF0 that | |
605 | represents a composition rule. | |
4ed46869 KH |
606 | */ |
607 | ||
608 | enum emacs_code_class_type emacs_code_class[256]; | |
609 | ||
4ed46869 KH |
610 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
611 | Check if a text is encoded in Emacs' internal format. If it is, | |
d46c5b12 | 612 | return CODING_CATEGORY_MASK_EMACS_MULE, else return 0. */ |
4ed46869 | 613 | |
0a28aafb KH |
614 | static int |
615 | detect_coding_emacs_mule (src, src_end, multibytep) | |
b73bfc1c | 616 | unsigned char *src, *src_end; |
0a28aafb | 617 | int multibytep; |
4ed46869 KH |
618 | { |
619 | unsigned char c; | |
620 | int composing = 0; | |
b73bfc1c KH |
621 | /* Dummy for ONE_MORE_BYTE. */ |
622 | struct coding_system dummy_coding; | |
623 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 624 | |
b73bfc1c | 625 | while (1) |
4ed46869 | 626 | { |
0a28aafb | 627 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
4ed46869 KH |
628 | |
629 | if (composing) | |
630 | { | |
631 | if (c < 0xA0) | |
632 | composing = 0; | |
b73bfc1c KH |
633 | else if (c == 0xA0) |
634 | { | |
0a28aafb | 635 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
b73bfc1c KH |
636 | c &= 0x7F; |
637 | } | |
4ed46869 KH |
638 | else |
639 | c -= 0x20; | |
640 | } | |
641 | ||
b73bfc1c | 642 | if (c < 0x20) |
4ed46869 | 643 | { |
4ed46869 KH |
644 | if (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) |
645 | return 0; | |
b73bfc1c KH |
646 | } |
647 | else if (c >= 0x80 && c < 0xA0) | |
648 | { | |
649 | if (c == 0x80) | |
650 | /* Old leading code for a composite character. */ | |
651 | composing = 1; | |
652 | else | |
653 | { | |
654 | unsigned char *src_base = src - 1; | |
655 | int bytes; | |
4ed46869 | 656 | |
b73bfc1c KH |
657 | if (!UNIBYTE_STR_AS_MULTIBYTE_P (src_base, src_end - src_base, |
658 | bytes)) | |
659 | return 0; | |
660 | src = src_base + bytes; | |
661 | } | |
662 | } | |
663 | } | |
664 | label_end_of_loop: | |
665 | return CODING_CATEGORY_MASK_EMACS_MULE; | |
666 | } | |
4ed46869 | 667 | |
4ed46869 | 668 | |
aa72b389 KH |
669 | /* Record the starting position START and METHOD of one composition. */ |
670 | ||
671 | #define CODING_ADD_COMPOSITION_START(coding, start, method) \ | |
672 | do { \ | |
673 | struct composition_data *cmp_data = coding->cmp_data; \ | |
674 | int *data = cmp_data->data + cmp_data->used; \ | |
675 | coding->cmp_data_start = cmp_data->used; \ | |
676 | data[0] = -1; \ | |
677 | data[1] = cmp_data->char_offset + start; \ | |
678 | data[3] = (int) method; \ | |
679 | cmp_data->used += 4; \ | |
680 | } while (0) | |
681 | ||
682 | /* Record the ending position END of the current composition. */ | |
683 | ||
684 | #define CODING_ADD_COMPOSITION_END(coding, end) \ | |
685 | do { \ | |
686 | struct composition_data *cmp_data = coding->cmp_data; \ | |
687 | int *data = cmp_data->data + coding->cmp_data_start; \ | |
688 | data[0] = cmp_data->used - coding->cmp_data_start; \ | |
689 | data[2] = cmp_data->char_offset + end; \ | |
690 | } while (0) | |
691 | ||
692 | /* Record one COMPONENT (alternate character or composition rule). */ | |
693 | ||
b6871cc7 KH |
694 | #define CODING_ADD_COMPOSITION_COMPONENT(coding, component) \ |
695 | do { \ | |
696 | coding->cmp_data->data[coding->cmp_data->used++] = component; \ | |
697 | if (coding->cmp_data->used - coding->cmp_data_start \ | |
698 | == COMPOSITION_DATA_MAX_BUNCH_LENGTH) \ | |
699 | { \ | |
700 | CODING_ADD_COMPOSITION_END (coding, coding->produced_char); \ | |
701 | coding->composing = COMPOSITION_NO; \ | |
702 | } \ | |
703 | } while (0) | |
aa72b389 KH |
704 | |
705 | ||
706 | /* Get one byte from a data pointed by SRC and increment SRC. If SRC | |
8ca3766a | 707 | is not less than SRC_END, return -1 without incrementing Src. */ |
aa72b389 KH |
708 | |
709 | #define SAFE_ONE_MORE_BYTE() (src >= src_end ? -1 : *src++) | |
710 | ||
711 | ||
712 | /* Decode a character represented as a component of composition | |
713 | sequence of Emacs 20 style at SRC. Set C to that character, store | |
714 | its multibyte form sequence at P, and set P to the end of that | |
715 | sequence. If no valid character is found, set C to -1. */ | |
716 | ||
717 | #define DECODE_EMACS_MULE_COMPOSITION_CHAR(c, p) \ | |
718 | do { \ | |
719 | int bytes; \ | |
fd3ae0b9 | 720 | \ |
aa72b389 KH |
721 | c = SAFE_ONE_MORE_BYTE (); \ |
722 | if (c < 0) \ | |
723 | break; \ | |
724 | if (CHAR_HEAD_P (c)) \ | |
725 | c = -1; \ | |
726 | else if (c == 0xA0) \ | |
727 | { \ | |
728 | c = SAFE_ONE_MORE_BYTE (); \ | |
729 | if (c < 0xA0) \ | |
730 | c = -1; \ | |
731 | else \ | |
732 | { \ | |
733 | c -= 0xA0; \ | |
734 | *p++ = c; \ | |
735 | } \ | |
736 | } \ | |
737 | else if (BASE_LEADING_CODE_P (c - 0x20)) \ | |
738 | { \ | |
739 | unsigned char *p0 = p; \ | |
740 | \ | |
741 | c -= 0x20; \ | |
742 | *p++ = c; \ | |
743 | bytes = BYTES_BY_CHAR_HEAD (c); \ | |
744 | while (--bytes) \ | |
745 | { \ | |
746 | c = SAFE_ONE_MORE_BYTE (); \ | |
747 | if (c < 0) \ | |
748 | break; \ | |
749 | *p++ = c; \ | |
750 | } \ | |
fd3ae0b9 KH |
751 | if (UNIBYTE_STR_AS_MULTIBYTE_P (p0, p - p0, bytes) \ |
752 | || (coding->flags /* We are recovering a file. */ \ | |
753 | && p0[0] == LEADING_CODE_8_BIT_CONTROL \ | |
754 | && ! CHAR_HEAD_P (p0[1]))) \ | |
aa72b389 KH |
755 | c = STRING_CHAR (p0, bytes); \ |
756 | else \ | |
757 | c = -1; \ | |
758 | } \ | |
759 | else \ | |
760 | c = -1; \ | |
761 | } while (0) | |
762 | ||
763 | ||
764 | /* Decode a composition rule represented as a component of composition | |
765 | sequence of Emacs 20 style at SRC. Set C to the rule. If not | |
766 | valid rule is found, set C to -1. */ | |
767 | ||
768 | #define DECODE_EMACS_MULE_COMPOSITION_RULE(c) \ | |
769 | do { \ | |
770 | c = SAFE_ONE_MORE_BYTE (); \ | |
771 | c -= 0xA0; \ | |
772 | if (c < 0 || c >= 81) \ | |
773 | c = -1; \ | |
774 | else \ | |
775 | { \ | |
776 | gref = c / 9, nref = c % 9; \ | |
777 | c = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
778 | } \ | |
779 | } while (0) | |
780 | ||
781 | ||
782 | /* Decode composition sequence encoded by `emacs-mule' at the source | |
783 | pointed by SRC. SRC_END is the end of source. Store information | |
784 | of the composition in CODING->cmp_data. | |
785 | ||
786 | For backward compatibility, decode also a composition sequence of | |
787 | Emacs 20 style. In that case, the composition sequence contains | |
788 | characters that should be extracted into a buffer or string. Store | |
789 | those characters at *DESTINATION in multibyte form. | |
790 | ||
791 | If we encounter an invalid byte sequence, return 0. | |
792 | If we encounter an insufficient source or destination, or | |
793 | insufficient space in CODING->cmp_data, return 1. | |
794 | Otherwise, return consumed bytes in the source. | |
795 | ||
796 | */ | |
797 | static INLINE int | |
798 | decode_composition_emacs_mule (coding, src, src_end, | |
799 | destination, dst_end, dst_bytes) | |
800 | struct coding_system *coding; | |
5bdca8af DN |
801 | const unsigned char *src, *src_end; |
802 | unsigned char **destination, *dst_end; | |
aa72b389 KH |
803 | int dst_bytes; |
804 | { | |
805 | unsigned char *dst = *destination; | |
806 | int method, data_len, nchars; | |
5bdca8af | 807 | const unsigned char *src_base = src++; |
8ca3766a | 808 | /* Store components of composition. */ |
aa72b389 KH |
809 | int component[COMPOSITION_DATA_MAX_BUNCH_LENGTH]; |
810 | int ncomponent; | |
811 | /* Store multibyte form of characters to be composed. This is for | |
812 | Emacs 20 style composition sequence. */ | |
813 | unsigned char buf[MAX_COMPOSITION_COMPONENTS * MAX_MULTIBYTE_LENGTH]; | |
814 | unsigned char *bufp = buf; | |
815 | int c, i, gref, nref; | |
816 | ||
817 | if (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH | |
818 | >= COMPOSITION_DATA_SIZE) | |
819 | { | |
820 | coding->result = CODING_FINISH_INSUFFICIENT_CMP; | |
821 | return -1; | |
822 | } | |
823 | ||
824 | ONE_MORE_BYTE (c); | |
825 | if (c - 0xF0 >= COMPOSITION_RELATIVE | |
826 | && c - 0xF0 <= COMPOSITION_WITH_RULE_ALTCHARS) | |
827 | { | |
828 | int with_rule; | |
829 | ||
830 | method = c - 0xF0; | |
831 | with_rule = (method == COMPOSITION_WITH_RULE | |
832 | || method == COMPOSITION_WITH_RULE_ALTCHARS); | |
833 | ONE_MORE_BYTE (c); | |
834 | data_len = c - 0xA0; | |
835 | if (data_len < 4 | |
836 | || src_base + data_len > src_end) | |
837 | return 0; | |
838 | ONE_MORE_BYTE (c); | |
839 | nchars = c - 0xA0; | |
840 | if (c < 1) | |
841 | return 0; | |
842 | for (ncomponent = 0; src < src_base + data_len; ncomponent++) | |
843 | { | |
b1887814 RS |
844 | /* If it is longer than this, it can't be valid. */ |
845 | if (ncomponent >= COMPOSITION_DATA_MAX_BUNCH_LENGTH) | |
846 | return 0; | |
847 | ||
aa72b389 KH |
848 | if (ncomponent % 2 && with_rule) |
849 | { | |
850 | ONE_MORE_BYTE (gref); | |
851 | gref -= 32; | |
852 | ONE_MORE_BYTE (nref); | |
853 | nref -= 32; | |
854 | c = COMPOSITION_ENCODE_RULE (gref, nref); | |
855 | } | |
856 | else | |
857 | { | |
858 | int bytes; | |
fd3ae0b9 KH |
859 | if (UNIBYTE_STR_AS_MULTIBYTE_P (src, src_end - src, bytes) |
860 | || (coding->flags /* We are recovering a file. */ | |
861 | && src[0] == LEADING_CODE_8_BIT_CONTROL | |
862 | && ! CHAR_HEAD_P (src[1]))) | |
aa72b389 KH |
863 | c = STRING_CHAR (src, bytes); |
864 | else | |
865 | c = *src, bytes = 1; | |
866 | src += bytes; | |
867 | } | |
868 | component[ncomponent] = c; | |
869 | } | |
870 | } | |
871 | else | |
872 | { | |
873 | /* This may be an old Emacs 20 style format. See the comment at | |
874 | the section 2 of this file. */ | |
875 | while (src < src_end && !CHAR_HEAD_P (*src)) src++; | |
876 | if (src == src_end | |
877 | && !(coding->mode & CODING_MODE_LAST_BLOCK)) | |
878 | goto label_end_of_loop; | |
879 | ||
880 | src_end = src; | |
881 | src = src_base + 1; | |
882 | if (c < 0xC0) | |
883 | { | |
884 | method = COMPOSITION_RELATIVE; | |
885 | for (ncomponent = 0; ncomponent < MAX_COMPOSITION_COMPONENTS;) | |
886 | { | |
887 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
888 | if (c < 0) | |
889 | break; | |
890 | component[ncomponent++] = c; | |
891 | } | |
892 | if (ncomponent < 2) | |
893 | return 0; | |
894 | nchars = ncomponent; | |
895 | } | |
896 | else if (c == 0xFF) | |
897 | { | |
898 | method = COMPOSITION_WITH_RULE; | |
899 | src++; | |
900 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
901 | if (c < 0) | |
902 | return 0; | |
903 | component[0] = c; | |
904 | for (ncomponent = 1; | |
905 | ncomponent < MAX_COMPOSITION_COMPONENTS * 2 - 1;) | |
906 | { | |
907 | DECODE_EMACS_MULE_COMPOSITION_RULE (c); | |
908 | if (c < 0) | |
909 | break; | |
910 | component[ncomponent++] = c; | |
911 | DECODE_EMACS_MULE_COMPOSITION_CHAR (c, bufp); | |
912 | if (c < 0) | |
913 | break; | |
914 | component[ncomponent++] = c; | |
915 | } | |
916 | if (ncomponent < 3) | |
917 | return 0; | |
918 | nchars = (ncomponent + 1) / 2; | |
919 | } | |
920 | else | |
921 | return 0; | |
922 | } | |
923 | ||
924 | if (buf == bufp || dst + (bufp - buf) <= (dst_bytes ? dst_end : src)) | |
925 | { | |
926 | CODING_ADD_COMPOSITION_START (coding, coding->produced_char, method); | |
927 | for (i = 0; i < ncomponent; i++) | |
928 | CODING_ADD_COMPOSITION_COMPONENT (coding, component[i]); | |
93dec019 | 929 | CODING_ADD_COMPOSITION_END (coding, coding->produced_char + nchars); |
aa72b389 KH |
930 | if (buf < bufp) |
931 | { | |
932 | unsigned char *p = buf; | |
933 | EMIT_BYTES (p, bufp); | |
934 | *destination += bufp - buf; | |
935 | coding->produced_char += nchars; | |
936 | } | |
937 | return (src - src_base); | |
938 | } | |
939 | label_end_of_loop: | |
940 | return -1; | |
941 | } | |
942 | ||
b73bfc1c | 943 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
4ed46869 | 944 | |
b73bfc1c KH |
945 | static void |
946 | decode_coding_emacs_mule (coding, source, destination, src_bytes, dst_bytes) | |
947 | struct coding_system *coding; | |
5bdca8af DN |
948 | const unsigned char *source; |
949 | unsigned char *destination; | |
b73bfc1c KH |
950 | int src_bytes, dst_bytes; |
951 | { | |
5bdca8af DN |
952 | const unsigned char *src = source; |
953 | const unsigned char *src_end = source + src_bytes; | |
b73bfc1c KH |
954 | unsigned char *dst = destination; |
955 | unsigned char *dst_end = destination + dst_bytes; | |
956 | /* SRC_BASE remembers the start position in source in each loop. | |
957 | The loop will be exited when there's not enough source code, or | |
958 | when there's not enough destination area to produce a | |
959 | character. */ | |
5bdca8af | 960 | const unsigned char *src_base; |
4ed46869 | 961 | |
b73bfc1c | 962 | coding->produced_char = 0; |
8a33cf7b | 963 | while ((src_base = src) < src_end) |
b73bfc1c | 964 | { |
5bdca8af DN |
965 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; |
966 | const unsigned char *p; | |
b73bfc1c | 967 | int bytes; |
ec6d2bb8 | 968 | |
4af310db EZ |
969 | if (*src == '\r') |
970 | { | |
2bcdf662 | 971 | int c = *src++; |
4af310db | 972 | |
4af310db EZ |
973 | if (coding->eol_type == CODING_EOL_CR) |
974 | c = '\n'; | |
975 | else if (coding->eol_type == CODING_EOL_CRLF) | |
976 | { | |
977 | ONE_MORE_BYTE (c); | |
978 | if (c != '\n') | |
979 | { | |
4af310db EZ |
980 | src--; |
981 | c = '\r'; | |
982 | } | |
983 | } | |
984 | *dst++ = c; | |
985 | coding->produced_char++; | |
986 | continue; | |
987 | } | |
988 | else if (*src == '\n') | |
989 | { | |
990 | if ((coding->eol_type == CODING_EOL_CR | |
991 | || coding->eol_type == CODING_EOL_CRLF) | |
992 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
993 | { | |
994 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
995 | goto label_end_of_loop; | |
996 | } | |
997 | *dst++ = *src++; | |
998 | coding->produced_char++; | |
999 | continue; | |
1000 | } | |
3089d25c | 1001 | else if (*src == 0x80 && coding->cmp_data) |
aa72b389 KH |
1002 | { |
1003 | /* Start of composition data. */ | |
1004 | int consumed = decode_composition_emacs_mule (coding, src, src_end, | |
1005 | &dst, dst_end, | |
1006 | dst_bytes); | |
1007 | if (consumed < 0) | |
1008 | goto label_end_of_loop; | |
1009 | else if (consumed > 0) | |
1010 | { | |
1011 | src += consumed; | |
1012 | continue; | |
1013 | } | |
1014 | bytes = CHAR_STRING (*src, tmp); | |
1015 | p = tmp; | |
1016 | src++; | |
1017 | } | |
fd3ae0b9 KH |
1018 | else if (UNIBYTE_STR_AS_MULTIBYTE_P (src, src_end - src, bytes) |
1019 | || (coding->flags /* We are recovering a file. */ | |
1020 | && src[0] == LEADING_CODE_8_BIT_CONTROL | |
1021 | && ! CHAR_HEAD_P (src[1]))) | |
b73bfc1c KH |
1022 | { |
1023 | p = src; | |
1024 | src += bytes; | |
1025 | } | |
1026 | else | |
1027 | { | |
6eced09c KH |
1028 | int i, c; |
1029 | ||
1030 | bytes = BYTES_BY_CHAR_HEAD (*src); | |
b73bfc1c | 1031 | src++; |
6eced09c KH |
1032 | for (i = 1; i < bytes; i++) |
1033 | { | |
1034 | ONE_MORE_BYTE (c); | |
1035 | if (CHAR_HEAD_P (c)) | |
1036 | break; | |
1037 | } | |
1038 | if (i < bytes) | |
1039 | { | |
1040 | bytes = CHAR_STRING (*src_base, tmp); | |
1041 | p = tmp; | |
1042 | src = src_base + 1; | |
1043 | } | |
1044 | else | |
1045 | { | |
1046 | p = src_base; | |
1047 | } | |
b73bfc1c KH |
1048 | } |
1049 | if (dst + bytes >= (dst_bytes ? dst_end : src)) | |
1050 | { | |
1051 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
4ed46869 KH |
1052 | break; |
1053 | } | |
b73bfc1c KH |
1054 | while (bytes--) *dst++ = *p++; |
1055 | coding->produced_char++; | |
4ed46869 | 1056 | } |
4af310db | 1057 | label_end_of_loop: |
b73bfc1c KH |
1058 | coding->consumed = coding->consumed_char = src_base - source; |
1059 | coding->produced = dst - destination; | |
4ed46869 KH |
1060 | } |
1061 | ||
b73bfc1c | 1062 | |
aa72b389 KH |
1063 | /* Encode composition data stored at DATA into a special byte sequence |
1064 | starting by 0x80. Update CODING->cmp_data_start and maybe | |
1065 | CODING->cmp_data for the next call. */ | |
1066 | ||
1067 | #define ENCODE_COMPOSITION_EMACS_MULE(coding, data) \ | |
1068 | do { \ | |
1069 | unsigned char buf[1024], *p0 = buf, *p; \ | |
1070 | int len = data[0]; \ | |
1071 | int i; \ | |
1072 | \ | |
1073 | buf[0] = 0x80; \ | |
1074 | buf[1] = 0xF0 + data[3]; /* METHOD */ \ | |
1075 | buf[3] = 0xA0 + (data[2] - data[1]); /* COMPOSED-CHARS */ \ | |
1076 | p = buf + 4; \ | |
1077 | if (data[3] == COMPOSITION_WITH_RULE \ | |
1078 | || data[3] == COMPOSITION_WITH_RULE_ALTCHARS) \ | |
1079 | { \ | |
1080 | p += CHAR_STRING (data[4], p); \ | |
1081 | for (i = 5; i < len; i += 2) \ | |
1082 | { \ | |
1083 | int gref, nref; \ | |
1084 | COMPOSITION_DECODE_RULE (data[i], gref, nref); \ | |
1085 | *p++ = 0x20 + gref; \ | |
1086 | *p++ = 0x20 + nref; \ | |
1087 | p += CHAR_STRING (data[i + 1], p); \ | |
1088 | } \ | |
1089 | } \ | |
1090 | else \ | |
1091 | { \ | |
1092 | for (i = 4; i < len; i++) \ | |
1093 | p += CHAR_STRING (data[i], p); \ | |
1094 | } \ | |
1095 | buf[2] = 0xA0 + (p - buf); /* COMPONENTS-BYTES */ \ | |
1096 | \ | |
1097 | if (dst + (p - buf) + 4 > (dst_bytes ? dst_end : src)) \ | |
1098 | { \ | |
1099 | coding->result = CODING_FINISH_INSUFFICIENT_DST; \ | |
1100 | goto label_end_of_loop; \ | |
1101 | } \ | |
1102 | while (p0 < p) \ | |
1103 | *dst++ = *p0++; \ | |
1104 | coding->cmp_data_start += data[0]; \ | |
1105 | if (coding->cmp_data_start == coding->cmp_data->used \ | |
1106 | && coding->cmp_data->next) \ | |
1107 | { \ | |
1108 | coding->cmp_data = coding->cmp_data->next; \ | |
1109 | coding->cmp_data_start = 0; \ | |
1110 | } \ | |
1111 | } while (0) | |
93dec019 | 1112 | |
aa72b389 | 1113 | |
a4244313 | 1114 | static void encode_eol P_ ((struct coding_system *, const unsigned char *, |
aa72b389 KH |
1115 | unsigned char *, int, int)); |
1116 | ||
1117 | static void | |
1118 | encode_coding_emacs_mule (coding, source, destination, src_bytes, dst_bytes) | |
1119 | struct coding_system *coding; | |
5bdca8af DN |
1120 | const unsigned char *source; |
1121 | unsigned char *destination; | |
aa72b389 KH |
1122 | int src_bytes, dst_bytes; |
1123 | { | |
5bdca8af DN |
1124 | const unsigned char *src = source; |
1125 | const unsigned char *src_end = source + src_bytes; | |
aa72b389 KH |
1126 | unsigned char *dst = destination; |
1127 | unsigned char *dst_end = destination + dst_bytes; | |
5bdca8af | 1128 | const unsigned char *src_base; |
aa72b389 KH |
1129 | int c; |
1130 | int char_offset; | |
1131 | int *data; | |
1132 | ||
1133 | Lisp_Object translation_table; | |
1134 | ||
1135 | translation_table = Qnil; | |
1136 | ||
1137 | /* Optimization for the case that there's no composition. */ | |
1138 | if (!coding->cmp_data || coding->cmp_data->used == 0) | |
1139 | { | |
1140 | encode_eol (coding, source, destination, src_bytes, dst_bytes); | |
1141 | return; | |
1142 | } | |
1143 | ||
1144 | char_offset = coding->cmp_data->char_offset; | |
1145 | data = coding->cmp_data->data + coding->cmp_data_start; | |
1146 | while (1) | |
1147 | { | |
1148 | src_base = src; | |
1149 | ||
1150 | /* If SRC starts a composition, encode the information about the | |
1151 | composition in advance. */ | |
1152 | if (coding->cmp_data_start < coding->cmp_data->used | |
1153 | && char_offset + coding->consumed_char == data[1]) | |
1154 | { | |
1155 | ENCODE_COMPOSITION_EMACS_MULE (coding, data); | |
1156 | char_offset = coding->cmp_data->char_offset; | |
1157 | data = coding->cmp_data->data + coding->cmp_data_start; | |
1158 | } | |
1159 | ||
1160 | ONE_MORE_CHAR (c); | |
1161 | if (c == '\n' && (coding->eol_type == CODING_EOL_CRLF | |
1162 | || coding->eol_type == CODING_EOL_CR)) | |
1163 | { | |
1164 | if (coding->eol_type == CODING_EOL_CRLF) | |
1165 | EMIT_TWO_BYTES ('\r', c); | |
1166 | else | |
1167 | EMIT_ONE_BYTE ('\r'); | |
1168 | } | |
1169 | else if (SINGLE_BYTE_CHAR_P (c)) | |
fd3ae0b9 KH |
1170 | { |
1171 | if (coding->flags && ! ASCII_BYTE_P (c)) | |
1172 | { | |
1173 | /* As we are auto saving, retain the multibyte form for | |
1174 | 8-bit chars. */ | |
1175 | unsigned char buf[MAX_MULTIBYTE_LENGTH]; | |
1176 | int bytes = CHAR_STRING (c, buf); | |
1177 | ||
1178 | if (bytes == 1) | |
1179 | EMIT_ONE_BYTE (buf[0]); | |
1180 | else | |
1181 | EMIT_TWO_BYTES (buf[0], buf[1]); | |
1182 | } | |
1183 | else | |
1184 | EMIT_ONE_BYTE (c); | |
1185 | } | |
aa72b389 KH |
1186 | else |
1187 | EMIT_BYTES (src_base, src); | |
1188 | coding->consumed_char++; | |
1189 | } | |
1190 | label_end_of_loop: | |
1191 | coding->consumed = src_base - source; | |
1192 | coding->produced = coding->produced_char = dst - destination; | |
1193 | return; | |
1194 | } | |
b73bfc1c | 1195 | |
4ed46869 KH |
1196 | \f |
1197 | /*** 3. ISO2022 handlers ***/ | |
1198 | ||
1199 | /* The following note describes the coding system ISO2022 briefly. | |
39787efd | 1200 | Since the intention of this note is to help understand the |
cfb43547 | 1201 | functions in this file, some parts are NOT ACCURATE or are OVERLY |
39787efd | 1202 | SIMPLIFIED. For thorough understanding, please refer to the |
cfb43547 DL |
1203 | original document of ISO2022. This is equivalent to the standard |
1204 | ECMA-35, obtainable from <URL:http://www.ecma.ch/> (*). | |
4ed46869 KH |
1205 | |
1206 | ISO2022 provides many mechanisms to encode several character sets | |
cfb43547 | 1207 | in 7-bit and 8-bit environments. For 7-bit environments, all text |
39787efd KH |
1208 | is encoded using bytes less than 128. This may make the encoded |
1209 | text a little bit longer, but the text passes more easily through | |
cfb43547 | 1210 | several types of gateway, some of which strip off the MSB (Most |
8ca3766a | 1211 | Significant Bit). |
b73bfc1c | 1212 | |
cfb43547 DL |
1213 | There are two kinds of character sets: control character sets and |
1214 | graphic character sets. The former contain control characters such | |
4ed46869 | 1215 | as `newline' and `escape' to provide control functions (control |
39787efd | 1216 | functions are also provided by escape sequences). The latter |
cfb43547 | 1217 | contain graphic characters such as 'A' and '-'. Emacs recognizes |
4ed46869 KH |
1218 | two control character sets and many graphic character sets. |
1219 | ||
1220 | Graphic character sets are classified into one of the following | |
39787efd KH |
1221 | four classes, according to the number of bytes (DIMENSION) and |
1222 | number of characters in one dimension (CHARS) of the set: | |
1223 | - DIMENSION1_CHARS94 | |
1224 | - DIMENSION1_CHARS96 | |
1225 | - DIMENSION2_CHARS94 | |
1226 | - DIMENSION2_CHARS96 | |
1227 | ||
1228 | In addition, each character set is assigned an identification tag, | |
cfb43547 | 1229 | unique for each set, called the "final character" (denoted as <F> |
39787efd KH |
1230 | hereafter). The <F> of each character set is decided by ECMA(*) |
1231 | when it is registered in ISO. The code range of <F> is 0x30..0x7F | |
1232 | (0x30..0x3F are for private use only). | |
4ed46869 KH |
1233 | |
1234 | Note (*): ECMA = European Computer Manufacturers Association | |
1235 | ||
cfb43547 | 1236 | Here are examples of graphic character sets [NAME(<F>)]: |
4ed46869 KH |
1237 | o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ... |
1238 | o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ... | |
1239 | o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ... | |
1240 | o DIMENSION2_CHARS96 -- none for the moment | |
1241 | ||
39787efd | 1242 | A code area (1 byte=8 bits) is divided into 4 areas, C0, GL, C1, and GR. |
4ed46869 KH |
1243 | C0 [0x00..0x1F] -- control character plane 0 |
1244 | GL [0x20..0x7F] -- graphic character plane 0 | |
1245 | C1 [0x80..0x9F] -- control character plane 1 | |
1246 | GR [0xA0..0xFF] -- graphic character plane 1 | |
1247 | ||
1248 | A control character set is directly designated and invoked to C0 or | |
39787efd KH |
1249 | C1 by an escape sequence. The most common case is that: |
1250 | - ISO646's control character set is designated/invoked to C0, and | |
1251 | - ISO6429's control character set is designated/invoked to C1, | |
1252 | and usually these designations/invocations are omitted in encoded | |
1253 | text. In a 7-bit environment, only C0 can be used, and a control | |
1254 | character for C1 is encoded by an appropriate escape sequence to | |
1255 | fit into the environment. All control characters for C1 are | |
1256 | defined to have corresponding escape sequences. | |
4ed46869 KH |
1257 | |
1258 | A graphic character set is at first designated to one of four | |
1259 | graphic registers (G0 through G3), then these graphic registers are | |
1260 | invoked to GL or GR. These designations and invocations can be | |
1261 | done independently. The most common case is that G0 is invoked to | |
39787efd KH |
1262 | GL, G1 is invoked to GR, and ASCII is designated to G0. Usually |
1263 | these invocations and designations are omitted in encoded text. | |
1264 | In a 7-bit environment, only GL can be used. | |
4ed46869 | 1265 | |
39787efd KH |
1266 | When a graphic character set of CHARS94 is invoked to GL, codes |
1267 | 0x20 and 0x7F of the GL area work as control characters SPACE and | |
1268 | DEL respectively, and codes 0xA0 and 0xFF of the GR area should not | |
1269 | be used. | |
4ed46869 KH |
1270 | |
1271 | There are two ways of invocation: locking-shift and single-shift. | |
1272 | With locking-shift, the invocation lasts until the next different | |
39787efd KH |
1273 | invocation, whereas with single-shift, the invocation affects the |
1274 | following character only and doesn't affect the locking-shift | |
1275 | state. Invocations are done by the following control characters or | |
1276 | escape sequences: | |
4ed46869 KH |
1277 | |
1278 | ---------------------------------------------------------------------- | |
39787efd | 1279 | abbrev function cntrl escape seq description |
4ed46869 | 1280 | ---------------------------------------------------------------------- |
39787efd KH |
1281 | SI/LS0 (shift-in) 0x0F none invoke G0 into GL |
1282 | SO/LS1 (shift-out) 0x0E none invoke G1 into GL | |
1283 | LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL | |
1284 | LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL | |
1285 | LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*) | |
1286 | LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*) | |
1287 | LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*) | |
1288 | SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char | |
1289 | SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char | |
4ed46869 | 1290 | ---------------------------------------------------------------------- |
39787efd KH |
1291 | (*) These are not used by any known coding system. |
1292 | ||
1293 | Control characters for these functions are defined by macros | |
1294 | ISO_CODE_XXX in `coding.h'. | |
4ed46869 | 1295 | |
39787efd | 1296 | Designations are done by the following escape sequences: |
4ed46869 KH |
1297 | ---------------------------------------------------------------------- |
1298 | escape sequence description | |
1299 | ---------------------------------------------------------------------- | |
1300 | ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0 | |
1301 | ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1 | |
1302 | ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2 | |
1303 | ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3 | |
1304 | ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*) | |
1305 | ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1 | |
1306 | ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2 | |
1307 | ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3 | |
1308 | ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**) | |
1309 | ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1 | |
1310 | ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2 | |
1311 | ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3 | |
1312 | ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*) | |
1313 | ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1 | |
1314 | ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2 | |
1315 | ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3 | |
1316 | ---------------------------------------------------------------------- | |
1317 | ||
1318 | In this list, "DIMENSION1_CHARS94<F>" means a graphic character set | |
39787efd | 1319 | of dimension 1, chars 94, and final character <F>, etc... |
4ed46869 KH |
1320 | |
1321 | Note (*): Although these designations are not allowed in ISO2022, | |
1322 | Emacs accepts them on decoding, and produces them on encoding | |
39787efd | 1323 | CHARS96 character sets in a coding system which is characterized as |
4ed46869 KH |
1324 | 7-bit environment, non-locking-shift, and non-single-shift. |
1325 | ||
1326 | Note (**): If <F> is '@', 'A', or 'B', the intermediate character | |
39787efd | 1327 | '(' can be omitted. We refer to this as "short-form" hereafter. |
4ed46869 | 1328 | |
cfb43547 | 1329 | Now you may notice that there are a lot of ways of encoding the |
39787efd KH |
1330 | same multilingual text in ISO2022. Actually, there exist many |
1331 | coding systems such as Compound Text (used in X11's inter client | |
8ca3766a DL |
1332 | communication, ISO-2022-JP (used in Japanese Internet), ISO-2022-KR |
1333 | (used in Korean Internet), EUC (Extended UNIX Code, used in Asian | |
4ed46869 KH |
1334 | localized platforms), and all of these are variants of ISO2022. |
1335 | ||
1336 | In addition to the above, Emacs handles two more kinds of escape | |
1337 | sequences: ISO6429's direction specification and Emacs' private | |
1338 | sequence for specifying character composition. | |
1339 | ||
39787efd | 1340 | ISO6429's direction specification takes the following form: |
4ed46869 KH |
1341 | o CSI ']' -- end of the current direction |
1342 | o CSI '0' ']' -- end of the current direction | |
1343 | o CSI '1' ']' -- start of left-to-right text | |
1344 | o CSI '2' ']' -- start of right-to-left text | |
1345 | The control character CSI (0x9B: control sequence introducer) is | |
39787efd KH |
1346 | abbreviated to the escape sequence ESC '[' in a 7-bit environment. |
1347 | ||
1348 | Character composition specification takes the following form: | |
ec6d2bb8 KH |
1349 | o ESC '0' -- start relative composition |
1350 | o ESC '1' -- end composition | |
1351 | o ESC '2' -- start rule-base composition (*) | |
1352 | o ESC '3' -- start relative composition with alternate chars (**) | |
1353 | o ESC '4' -- start rule-base composition with alternate chars (**) | |
b73bfc1c | 1354 | Since these are not standard escape sequences of any ISO standard, |
cfb43547 | 1355 | the use of them with these meanings is restricted to Emacs only. |
ec6d2bb8 | 1356 | |
cfb43547 | 1357 | (*) This form is used only in Emacs 20.5 and older versions, |
b73bfc1c | 1358 | but the newer versions can safely decode it. |
cfb43547 | 1359 | (**) This form is used only in Emacs 21.1 and newer versions, |
b73bfc1c | 1360 | and the older versions can't decode it. |
ec6d2bb8 | 1361 | |
cfb43547 | 1362 | Here's a list of example usages of these composition escape |
b73bfc1c | 1363 | sequences (categorized by `enum composition_method'). |
ec6d2bb8 | 1364 | |
b73bfc1c | 1365 | COMPOSITION_RELATIVE: |
ec6d2bb8 | 1366 | ESC 0 CHAR [ CHAR ] ESC 1 |
8ca3766a | 1367 | COMPOSITION_WITH_RULE: |
ec6d2bb8 | 1368 | ESC 2 CHAR [ RULE CHAR ] ESC 1 |
b73bfc1c | 1369 | COMPOSITION_WITH_ALTCHARS: |
ec6d2bb8 | 1370 | ESC 3 ALTCHAR [ ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 |
b73bfc1c | 1371 | COMPOSITION_WITH_RULE_ALTCHARS: |
ec6d2bb8 | 1372 | ESC 4 ALTCHAR [ RULE ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 */ |
4ed46869 KH |
1373 | |
1374 | enum iso_code_class_type iso_code_class[256]; | |
1375 | ||
05e6f5dc KH |
1376 | #define CHARSET_OK(idx, charset, c) \ |
1377 | (coding_system_table[idx] \ | |
1378 | && (charset == CHARSET_ASCII \ | |
6b89e3aa | 1379 | || (safe_chars = coding_safe_chars (coding_system_table[idx]->symbol), \ |
05e6f5dc KH |
1380 | CODING_SAFE_CHAR_P (safe_chars, c))) \ |
1381 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding_system_table[idx], \ | |
1382 | charset) \ | |
1383 | != CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION)) | |
d46c5b12 KH |
1384 | |
1385 | #define SHIFT_OUT_OK(idx) \ | |
1386 | (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding_system_table[idx], 1) >= 0) | |
1387 | ||
b6871cc7 KH |
1388 | #define COMPOSITION_OK(idx) \ |
1389 | (coding_system_table[idx]->composing != COMPOSITION_DISABLED) | |
1390 | ||
4ed46869 | 1391 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
cfb43547 | 1392 | Check if a text is encoded in ISO2022. If it is, return an |
4ed46869 KH |
1393 | integer in which appropriate flag bits any of: |
1394 | CODING_CATEGORY_MASK_ISO_7 | |
d46c5b12 | 1395 | CODING_CATEGORY_MASK_ISO_7_TIGHT |
4ed46869 KH |
1396 | CODING_CATEGORY_MASK_ISO_8_1 |
1397 | CODING_CATEGORY_MASK_ISO_8_2 | |
7717c392 KH |
1398 | CODING_CATEGORY_MASK_ISO_7_ELSE |
1399 | CODING_CATEGORY_MASK_ISO_8_ELSE | |
4ed46869 KH |
1400 | are set. If a code which should never appear in ISO2022 is found, |
1401 | returns 0. */ | |
1402 | ||
0a28aafb KH |
1403 | static int |
1404 | detect_coding_iso2022 (src, src_end, multibytep) | |
4ed46869 | 1405 | unsigned char *src, *src_end; |
0a28aafb | 1406 | int multibytep; |
4ed46869 | 1407 | { |
d46c5b12 KH |
1408 | int mask = CODING_CATEGORY_MASK_ISO; |
1409 | int mask_found = 0; | |
f46869e4 | 1410 | int reg[4], shift_out = 0, single_shifting = 0; |
da55a2b7 | 1411 | int c, c1, charset; |
b73bfc1c KH |
1412 | /* Dummy for ONE_MORE_BYTE. */ |
1413 | struct coding_system dummy_coding; | |
1414 | struct coding_system *coding = &dummy_coding; | |
05e6f5dc | 1415 | Lisp_Object safe_chars; |
3f003981 | 1416 | |
d46c5b12 | 1417 | reg[0] = CHARSET_ASCII, reg[1] = reg[2] = reg[3] = -1; |
3f003981 | 1418 | while (mask && src < src_end) |
4ed46869 | 1419 | { |
0a28aafb | 1420 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
8d239c89 | 1421 | retry: |
4ed46869 KH |
1422 | switch (c) |
1423 | { | |
1424 | case ISO_CODE_ESC: | |
74383408 KH |
1425 | if (inhibit_iso_escape_detection) |
1426 | break; | |
f46869e4 | 1427 | single_shifting = 0; |
0a28aafb | 1428 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
d46c5b12 | 1429 | if (c >= '(' && c <= '/') |
4ed46869 | 1430 | { |
bf9cdd4e | 1431 | /* Designation sequence for a charset of dimension 1. */ |
0a28aafb | 1432 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
d46c5b12 KH |
1433 | if (c1 < ' ' || c1 >= 0x80 |
1434 | || (charset = iso_charset_table[0][c >= ','][c1]) < 0) | |
1435 | /* Invalid designation sequence. Just ignore. */ | |
1436 | break; | |
1437 | reg[(c - '(') % 4] = charset; | |
bf9cdd4e KH |
1438 | } |
1439 | else if (c == '$') | |
1440 | { | |
1441 | /* Designation sequence for a charset of dimension 2. */ | |
0a28aafb | 1442 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
bf9cdd4e KH |
1443 | if (c >= '@' && c <= 'B') |
1444 | /* Designation for JISX0208.1978, GB2312, or JISX0208. */ | |
d46c5b12 | 1445 | reg[0] = charset = iso_charset_table[1][0][c]; |
bf9cdd4e | 1446 | else if (c >= '(' && c <= '/') |
bcf26d6a | 1447 | { |
0a28aafb | 1448 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
d46c5b12 KH |
1449 | if (c1 < ' ' || c1 >= 0x80 |
1450 | || (charset = iso_charset_table[1][c >= ','][c1]) < 0) | |
1451 | /* Invalid designation sequence. Just ignore. */ | |
1452 | break; | |
1453 | reg[(c - '(') % 4] = charset; | |
bcf26d6a | 1454 | } |
bf9cdd4e | 1455 | else |
d46c5b12 KH |
1456 | /* Invalid designation sequence. Just ignore. */ |
1457 | break; | |
1458 | } | |
ae9ff118 | 1459 | else if (c == 'N' || c == 'O') |
d46c5b12 | 1460 | { |
ae9ff118 KH |
1461 | /* ESC <Fe> for SS2 or SS3. */ |
1462 | mask &= CODING_CATEGORY_MASK_ISO_7_ELSE; | |
d46c5b12 | 1463 | break; |
4ed46869 | 1464 | } |
ec6d2bb8 KH |
1465 | else if (c >= '0' && c <= '4') |
1466 | { | |
1467 | /* ESC <Fp> for start/end composition. */ | |
b6871cc7 KH |
1468 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_7)) |
1469 | mask_found |= CODING_CATEGORY_MASK_ISO_7; | |
1470 | else | |
1471 | mask &= ~CODING_CATEGORY_MASK_ISO_7; | |
1472 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_7_TIGHT)) | |
1473 | mask_found |= CODING_CATEGORY_MASK_ISO_7_TIGHT; | |
1474 | else | |
1475 | mask &= ~CODING_CATEGORY_MASK_ISO_7_TIGHT; | |
1476 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_8_1)) | |
1477 | mask_found |= CODING_CATEGORY_MASK_ISO_8_1; | |
1478 | else | |
1479 | mask &= ~CODING_CATEGORY_MASK_ISO_8_1; | |
1480 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_8_2)) | |
1481 | mask_found |= CODING_CATEGORY_MASK_ISO_8_2; | |
1482 | else | |
1483 | mask &= ~CODING_CATEGORY_MASK_ISO_8_2; | |
1484 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_7_ELSE)) | |
1485 | mask_found |= CODING_CATEGORY_MASK_ISO_7_ELSE; | |
1486 | else | |
1487 | mask &= ~CODING_CATEGORY_MASK_ISO_7_ELSE; | |
1488 | if (COMPOSITION_OK (CODING_CATEGORY_IDX_ISO_8_ELSE)) | |
1489 | mask_found |= CODING_CATEGORY_MASK_ISO_8_ELSE; | |
1490 | else | |
1491 | mask &= ~CODING_CATEGORY_MASK_ISO_8_ELSE; | |
ec6d2bb8 KH |
1492 | break; |
1493 | } | |
bf9cdd4e | 1494 | else |
d46c5b12 KH |
1495 | /* Invalid escape sequence. Just ignore. */ |
1496 | break; | |
1497 | ||
1498 | /* We found a valid designation sequence for CHARSET. */ | |
1499 | mask &= ~CODING_CATEGORY_MASK_ISO_8BIT; | |
05e6f5dc KH |
1500 | c = MAKE_CHAR (charset, 0, 0); |
1501 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7, charset, c)) | |
d46c5b12 KH |
1502 | mask_found |= CODING_CATEGORY_MASK_ISO_7; |
1503 | else | |
1504 | mask &= ~CODING_CATEGORY_MASK_ISO_7; | |
05e6f5dc | 1505 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_TIGHT, charset, c)) |
d46c5b12 KH |
1506 | mask_found |= CODING_CATEGORY_MASK_ISO_7_TIGHT; |
1507 | else | |
1508 | mask &= ~CODING_CATEGORY_MASK_ISO_7_TIGHT; | |
05e6f5dc | 1509 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_ELSE, charset, c)) |
ae9ff118 KH |
1510 | mask_found |= CODING_CATEGORY_MASK_ISO_7_ELSE; |
1511 | else | |
d46c5b12 | 1512 | mask &= ~CODING_CATEGORY_MASK_ISO_7_ELSE; |
05e6f5dc | 1513 | if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_8_ELSE, charset, c)) |
ae9ff118 KH |
1514 | mask_found |= CODING_CATEGORY_MASK_ISO_8_ELSE; |
1515 | else | |
d46c5b12 | 1516 | mask &= ~CODING_CATEGORY_MASK_ISO_8_ELSE; |
4ed46869 KH |
1517 | break; |
1518 | ||
4ed46869 | 1519 | case ISO_CODE_SO: |
74383408 KH |
1520 | if (inhibit_iso_escape_detection) |
1521 | break; | |
f46869e4 | 1522 | single_shifting = 0; |
d46c5b12 KH |
1523 | if (shift_out == 0 |
1524 | && (reg[1] >= 0 | |
1525 | || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_7_ELSE) | |
1526 | || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_8_ELSE))) | |
1527 | { | |
1528 | /* Locking shift out. */ | |
1529 | mask &= ~CODING_CATEGORY_MASK_ISO_7BIT; | |
1530 | mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT; | |
1531 | } | |
e0e989f6 | 1532 | break; |
93dec019 | 1533 | |
d46c5b12 | 1534 | case ISO_CODE_SI: |
74383408 KH |
1535 | if (inhibit_iso_escape_detection) |
1536 | break; | |
f46869e4 | 1537 | single_shifting = 0; |
d46c5b12 KH |
1538 | if (shift_out == 1) |
1539 | { | |
1540 | /* Locking shift in. */ | |
1541 | mask &= ~CODING_CATEGORY_MASK_ISO_7BIT; | |
1542 | mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT; | |
1543 | } | |
1544 | break; | |
1545 | ||
4ed46869 | 1546 | case ISO_CODE_CSI: |
f46869e4 | 1547 | single_shifting = 0; |
4ed46869 KH |
1548 | case ISO_CODE_SS2: |
1549 | case ISO_CODE_SS3: | |
3f003981 KH |
1550 | { |
1551 | int newmask = CODING_CATEGORY_MASK_ISO_8_ELSE; | |
1552 | ||
74383408 KH |
1553 | if (inhibit_iso_escape_detection) |
1554 | break; | |
70c22245 KH |
1555 | if (c != ISO_CODE_CSI) |
1556 | { | |
d46c5b12 KH |
1557 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1558 | & CODING_FLAG_ISO_SINGLE_SHIFT) | |
70c22245 | 1559 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1560 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1561 | & CODING_FLAG_ISO_SINGLE_SHIFT) | |
70c22245 | 1562 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
f46869e4 | 1563 | single_shifting = 1; |
70c22245 | 1564 | } |
3f003981 KH |
1565 | if (VECTORP (Vlatin_extra_code_table) |
1566 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
1567 | { | |
d46c5b12 KH |
1568 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1569 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 | 1570 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1571 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1572 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 KH |
1573 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
1574 | } | |
1575 | mask &= newmask; | |
d46c5b12 | 1576 | mask_found |= newmask; |
3f003981 KH |
1577 | } |
1578 | break; | |
4ed46869 KH |
1579 | |
1580 | default: | |
1581 | if (c < 0x80) | |
f46869e4 KH |
1582 | { |
1583 | single_shifting = 0; | |
1584 | break; | |
1585 | } | |
4ed46869 | 1586 | else if (c < 0xA0) |
c4825358 | 1587 | { |
f46869e4 | 1588 | single_shifting = 0; |
3f003981 KH |
1589 | if (VECTORP (Vlatin_extra_code_table) |
1590 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
c4825358 | 1591 | { |
3f003981 KH |
1592 | int newmask = 0; |
1593 | ||
d46c5b12 KH |
1594 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_1]->flags |
1595 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 | 1596 | newmask |= CODING_CATEGORY_MASK_ISO_8_1; |
d46c5b12 KH |
1597 | if (coding_system_table[CODING_CATEGORY_IDX_ISO_8_2]->flags |
1598 | & CODING_FLAG_ISO_LATIN_EXTRA) | |
3f003981 KH |
1599 | newmask |= CODING_CATEGORY_MASK_ISO_8_2; |
1600 | mask &= newmask; | |
d46c5b12 | 1601 | mask_found |= newmask; |
c4825358 | 1602 | } |
3f003981 KH |
1603 | else |
1604 | return 0; | |
c4825358 | 1605 | } |
4ed46869 KH |
1606 | else |
1607 | { | |
d46c5b12 | 1608 | mask &= ~(CODING_CATEGORY_MASK_ISO_7BIT |
7717c392 | 1609 | | CODING_CATEGORY_MASK_ISO_7_ELSE); |
d46c5b12 | 1610 | mask_found |= CODING_CATEGORY_MASK_ISO_8_1; |
f46869e4 KH |
1611 | /* Check the length of succeeding codes of the range |
1612 | 0xA0..0FF. If the byte length is odd, we exclude | |
1613 | CODING_CATEGORY_MASK_ISO_8_2. We can check this only | |
1614 | when we are not single shifting. */ | |
b73bfc1c KH |
1615 | if (!single_shifting |
1616 | && mask & CODING_CATEGORY_MASK_ISO_8_2) | |
f46869e4 | 1617 | { |
e17de821 | 1618 | int i = 1; |
8d239c89 KH |
1619 | |
1620 | c = -1; | |
b73bfc1c KH |
1621 | while (src < src_end) |
1622 | { | |
0a28aafb | 1623 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
b73bfc1c KH |
1624 | if (c < 0xA0) |
1625 | break; | |
1626 | i++; | |
1627 | } | |
1628 | ||
1629 | if (i & 1 && src < src_end) | |
f46869e4 KH |
1630 | mask &= ~CODING_CATEGORY_MASK_ISO_8_2; |
1631 | else | |
1632 | mask_found |= CODING_CATEGORY_MASK_ISO_8_2; | |
8d239c89 KH |
1633 | if (c >= 0) |
1634 | /* This means that we have read one extra byte. */ | |
1635 | goto retry; | |
f46869e4 | 1636 | } |
4ed46869 KH |
1637 | } |
1638 | break; | |
1639 | } | |
1640 | } | |
b73bfc1c | 1641 | label_end_of_loop: |
d46c5b12 | 1642 | return (mask & mask_found); |
4ed46869 KH |
1643 | } |
1644 | ||
b73bfc1c KH |
1645 | /* Decode a character of which charset is CHARSET, the 1st position |
1646 | code is C1, the 2nd position code is C2, and return the decoded | |
1647 | character code. If the variable `translation_table' is non-nil, | |
1648 | returned the translated code. */ | |
ec6d2bb8 | 1649 | |
b73bfc1c KH |
1650 | #define DECODE_ISO_CHARACTER(charset, c1, c2) \ |
1651 | (NILP (translation_table) \ | |
1652 | ? MAKE_CHAR (charset, c1, c2) \ | |
1653 | : translate_char (translation_table, -1, charset, c1, c2)) | |
4ed46869 KH |
1654 | |
1655 | /* Set designation state into CODING. */ | |
d46c5b12 KH |
1656 | #define DECODE_DESIGNATION(reg, dimension, chars, final_char) \ |
1657 | do { \ | |
05e6f5dc | 1658 | int charset, c; \ |
944bd420 KH |
1659 | \ |
1660 | if (final_char < '0' || final_char >= 128) \ | |
1661 | goto label_invalid_code; \ | |
1662 | charset = ISO_CHARSET_TABLE (make_number (dimension), \ | |
1663 | make_number (chars), \ | |
1664 | make_number (final_char)); \ | |
05e6f5dc | 1665 | c = MAKE_CHAR (charset, 0, 0); \ |
d46c5b12 | 1666 | if (charset >= 0 \ |
704c5781 | 1667 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) == reg \ |
05e6f5dc | 1668 | || CODING_SAFE_CHAR_P (safe_chars, c))) \ |
d46c5b12 KH |
1669 | { \ |
1670 | if (coding->spec.iso2022.last_invalid_designation_register == 0 \ | |
1671 | && reg == 0 \ | |
1672 | && charset == CHARSET_ASCII) \ | |
1673 | { \ | |
1674 | /* We should insert this designation sequence as is so \ | |
1675 | that it is surely written back to a file. */ \ | |
1676 | coding->spec.iso2022.last_invalid_designation_register = -1; \ | |
1677 | goto label_invalid_code; \ | |
1678 | } \ | |
1679 | coding->spec.iso2022.last_invalid_designation_register = -1; \ | |
1680 | if ((coding->mode & CODING_MODE_DIRECTION) \ | |
1681 | && CHARSET_REVERSE_CHARSET (charset) >= 0) \ | |
1682 | charset = CHARSET_REVERSE_CHARSET (charset); \ | |
1683 | CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \ | |
1684 | } \ | |
1685 | else \ | |
1686 | { \ | |
1687 | coding->spec.iso2022.last_invalid_designation_register = reg; \ | |
1688 | goto label_invalid_code; \ | |
1689 | } \ | |
4ed46869 KH |
1690 | } while (0) |
1691 | ||
ec6d2bb8 KH |
1692 | /* Allocate a memory block for storing information about compositions. |
1693 | The block is chained to the already allocated blocks. */ | |
d46c5b12 | 1694 | |
33fb63eb | 1695 | void |
ec6d2bb8 | 1696 | coding_allocate_composition_data (coding, char_offset) |
d46c5b12 | 1697 | struct coding_system *coding; |
ec6d2bb8 | 1698 | int char_offset; |
d46c5b12 | 1699 | { |
ec6d2bb8 KH |
1700 | struct composition_data *cmp_data |
1701 | = (struct composition_data *) xmalloc (sizeof *cmp_data); | |
1702 | ||
1703 | cmp_data->char_offset = char_offset; | |
1704 | cmp_data->used = 0; | |
1705 | cmp_data->prev = coding->cmp_data; | |
1706 | cmp_data->next = NULL; | |
1707 | if (coding->cmp_data) | |
1708 | coding->cmp_data->next = cmp_data; | |
1709 | coding->cmp_data = cmp_data; | |
1710 | coding->cmp_data_start = 0; | |
4307d534 | 1711 | coding->composing = COMPOSITION_NO; |
ec6d2bb8 | 1712 | } |
d46c5b12 | 1713 | |
aa72b389 KH |
1714 | /* Handle composition start sequence ESC 0, ESC 2, ESC 3, or ESC 4. |
1715 | ESC 0 : relative composition : ESC 0 CHAR ... ESC 1 | |
1716 | ESC 2 : rulebase composition : ESC 2 CHAR RULE CHAR RULE ... CHAR ESC 1 | |
1717 | ESC 3 : altchar composition : ESC 3 ALT ... ESC 0 CHAR ... ESC 1 | |
1718 | ESC 4 : alt&rule composition : ESC 4 ALT RULE .. ALT ESC 0 CHAR ... ESC 1 | |
1719 | */ | |
ec6d2bb8 | 1720 | |
33fb63eb KH |
1721 | #define DECODE_COMPOSITION_START(c1) \ |
1722 | do { \ | |
1723 | if (coding->composing == COMPOSITION_DISABLED) \ | |
1724 | { \ | |
1725 | *dst++ = ISO_CODE_ESC; \ | |
1726 | *dst++ = c1 & 0x7f; \ | |
1727 | coding->produced_char += 2; \ | |
1728 | } \ | |
1729 | else if (!COMPOSING_P (coding)) \ | |
1730 | { \ | |
1731 | /* This is surely the start of a composition. We must be sure \ | |
1732 | that coding->cmp_data has enough space to store the \ | |
1733 | information about the composition. If not, terminate the \ | |
1734 | current decoding loop, allocate one more memory block for \ | |
8ca3766a | 1735 | coding->cmp_data in the caller, then start the decoding \ |
33fb63eb KH |
1736 | loop again. We can't allocate memory here directly because \ |
1737 | it may cause buffer/string relocation. */ \ | |
1738 | if (!coding->cmp_data \ | |
1739 | || (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH \ | |
1740 | >= COMPOSITION_DATA_SIZE)) \ | |
1741 | { \ | |
1742 | coding->result = CODING_FINISH_INSUFFICIENT_CMP; \ | |
1743 | goto label_end_of_loop; \ | |
1744 | } \ | |
1745 | coding->composing = (c1 == '0' ? COMPOSITION_RELATIVE \ | |
1746 | : c1 == '2' ? COMPOSITION_WITH_RULE \ | |
1747 | : c1 == '3' ? COMPOSITION_WITH_ALTCHARS \ | |
1748 | : COMPOSITION_WITH_RULE_ALTCHARS); \ | |
1749 | CODING_ADD_COMPOSITION_START (coding, coding->produced_char, \ | |
1750 | coding->composing); \ | |
1751 | coding->composition_rule_follows = 0; \ | |
1752 | } \ | |
1753 | else \ | |
1754 | { \ | |
1755 | /* We are already handling a composition. If the method is \ | |
1756 | the following two, the codes following the current escape \ | |
1757 | sequence are actual characters stored in a buffer. */ \ | |
1758 | if (coding->composing == COMPOSITION_WITH_ALTCHARS \ | |
1759 | || coding->composing == COMPOSITION_WITH_RULE_ALTCHARS) \ | |
1760 | { \ | |
1761 | coding->composing = COMPOSITION_RELATIVE; \ | |
1762 | coding->composition_rule_follows = 0; \ | |
1763 | } \ | |
1764 | } \ | |
ec6d2bb8 KH |
1765 | } while (0) |
1766 | ||
8ca3766a | 1767 | /* Handle composition end sequence ESC 1. */ |
ec6d2bb8 KH |
1768 | |
1769 | #define DECODE_COMPOSITION_END(c1) \ | |
1770 | do { \ | |
93dec019 | 1771 | if (! COMPOSING_P (coding)) \ |
ec6d2bb8 KH |
1772 | { \ |
1773 | *dst++ = ISO_CODE_ESC; \ | |
1774 | *dst++ = c1; \ | |
1775 | coding->produced_char += 2; \ | |
1776 | } \ | |
1777 | else \ | |
1778 | { \ | |
1779 | CODING_ADD_COMPOSITION_END (coding, coding->produced_char); \ | |
1780 | coding->composing = COMPOSITION_NO; \ | |
1781 | } \ | |
1782 | } while (0) | |
1783 | ||
1784 | /* Decode a composition rule from the byte C1 (and maybe one more byte | |
1785 | from SRC) and store one encoded composition rule in | |
1786 | coding->cmp_data. */ | |
1787 | ||
1788 | #define DECODE_COMPOSITION_RULE(c1) \ | |
1789 | do { \ | |
1790 | int rule = 0; \ | |
1791 | (c1) -= 32; \ | |
1792 | if (c1 < 81) /* old format (before ver.21) */ \ | |
1793 | { \ | |
1794 | int gref = (c1) / 9; \ | |
1795 | int nref = (c1) % 9; \ | |
1796 | if (gref == 4) gref = 10; \ | |
1797 | if (nref == 4) nref = 10; \ | |
1798 | rule = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
1799 | } \ | |
b73bfc1c | 1800 | else if (c1 < 93) /* new format (after ver.21) */ \ |
ec6d2bb8 KH |
1801 | { \ |
1802 | ONE_MORE_BYTE (c2); \ | |
1803 | rule = COMPOSITION_ENCODE_RULE (c1 - 81, c2 - 32); \ | |
1804 | } \ | |
1805 | CODING_ADD_COMPOSITION_COMPONENT (coding, rule); \ | |
1806 | coding->composition_rule_follows = 0; \ | |
1807 | } while (0) | |
88993dfd | 1808 | |
d46c5b12 | 1809 | |
4ed46869 KH |
1810 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
1811 | ||
b73bfc1c | 1812 | static void |
d46c5b12 | 1813 | decode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 1814 | struct coding_system *coding; |
5bdca8af DN |
1815 | const unsigned char *source; |
1816 | unsigned char *destination; | |
4ed46869 | 1817 | int src_bytes, dst_bytes; |
4ed46869 | 1818 | { |
5bdca8af DN |
1819 | const unsigned char *src = source; |
1820 | const unsigned char *src_end = source + src_bytes; | |
4ed46869 KH |
1821 | unsigned char *dst = destination; |
1822 | unsigned char *dst_end = destination + dst_bytes; | |
4ed46869 KH |
1823 | /* Charsets invoked to graphic plane 0 and 1 respectively. */ |
1824 | int charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
1825 | int charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
b73bfc1c KH |
1826 | /* SRC_BASE remembers the start position in source in each loop. |
1827 | The loop will be exited when there's not enough source code | |
1828 | (within macro ONE_MORE_BYTE), or when there's not enough | |
1829 | destination area to produce a character (within macro | |
1830 | EMIT_CHAR). */ | |
5bdca8af | 1831 | const unsigned char *src_base; |
b73bfc1c KH |
1832 | int c, charset; |
1833 | Lisp_Object translation_table; | |
05e6f5dc KH |
1834 | Lisp_Object safe_chars; |
1835 | ||
6b89e3aa | 1836 | safe_chars = coding_safe_chars (coding->symbol); |
bdd9fb48 | 1837 | |
b73bfc1c KH |
1838 | if (NILP (Venable_character_translation)) |
1839 | translation_table = Qnil; | |
1840 | else | |
1841 | { | |
1842 | translation_table = coding->translation_table_for_decode; | |
1843 | if (NILP (translation_table)) | |
1844 | translation_table = Vstandard_translation_table_for_decode; | |
1845 | } | |
4ed46869 | 1846 | |
b73bfc1c KH |
1847 | coding->result = CODING_FINISH_NORMAL; |
1848 | ||
1849 | while (1) | |
4ed46869 | 1850 | { |
85478bc6 | 1851 | int c1, c2 = 0; |
b73bfc1c KH |
1852 | |
1853 | src_base = src; | |
1854 | ONE_MORE_BYTE (c1); | |
4ed46869 | 1855 | |
ec6d2bb8 | 1856 | /* We produce no character or one character. */ |
4ed46869 KH |
1857 | switch (iso_code_class [c1]) |
1858 | { | |
1859 | case ISO_0x20_or_0x7F: | |
ec6d2bb8 KH |
1860 | if (COMPOSING_P (coding) && coding->composition_rule_follows) |
1861 | { | |
1862 | DECODE_COMPOSITION_RULE (c1); | |
b73bfc1c | 1863 | continue; |
ec6d2bb8 KH |
1864 | } |
1865 | if (charset0 < 0 || CHARSET_CHARS (charset0) == 94) | |
4ed46869 KH |
1866 | { |
1867 | /* This is SPACE or DEL. */ | |
b73bfc1c | 1868 | charset = CHARSET_ASCII; |
4ed46869 KH |
1869 | break; |
1870 | } | |
1871 | /* This is a graphic character, we fall down ... */ | |
1872 | ||
1873 | case ISO_graphic_plane_0: | |
ec6d2bb8 | 1874 | if (COMPOSING_P (coding) && coding->composition_rule_follows) |
b73bfc1c KH |
1875 | { |
1876 | DECODE_COMPOSITION_RULE (c1); | |
1877 | continue; | |
1878 | } | |
1879 | charset = charset0; | |
4ed46869 KH |
1880 | break; |
1881 | ||
1882 | case ISO_0xA0_or_0xFF: | |
d46c5b12 KH |
1883 | if (charset1 < 0 || CHARSET_CHARS (charset1) == 94 |
1884 | || coding->flags & CODING_FLAG_ISO_SEVEN_BITS) | |
fb88bf2d | 1885 | goto label_invalid_code; |
4ed46869 KH |
1886 | /* This is a graphic character, we fall down ... */ |
1887 | ||
1888 | case ISO_graphic_plane_1: | |
b73bfc1c | 1889 | if (charset1 < 0) |
fb88bf2d | 1890 | goto label_invalid_code; |
b73bfc1c | 1891 | charset = charset1; |
4ed46869 KH |
1892 | break; |
1893 | ||
b73bfc1c | 1894 | case ISO_control_0: |
ec6d2bb8 KH |
1895 | if (COMPOSING_P (coding)) |
1896 | DECODE_COMPOSITION_END ('1'); | |
1897 | ||
4ed46869 KH |
1898 | /* All ISO2022 control characters in this class have the |
1899 | same representation in Emacs internal format. */ | |
d46c5b12 KH |
1900 | if (c1 == '\n' |
1901 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
1902 | && (coding->eol_type == CODING_EOL_CR | |
1903 | || coding->eol_type == CODING_EOL_CRLF)) | |
1904 | { | |
b73bfc1c KH |
1905 | coding->result = CODING_FINISH_INCONSISTENT_EOL; |
1906 | goto label_end_of_loop; | |
d46c5b12 | 1907 | } |
b73bfc1c | 1908 | charset = CHARSET_ASCII; |
4ed46869 KH |
1909 | break; |
1910 | ||
b73bfc1c KH |
1911 | case ISO_control_1: |
1912 | if (COMPOSING_P (coding)) | |
1913 | DECODE_COMPOSITION_END ('1'); | |
1914 | goto label_invalid_code; | |
1915 | ||
4ed46869 | 1916 | case ISO_carriage_return: |
ec6d2bb8 KH |
1917 | if (COMPOSING_P (coding)) |
1918 | DECODE_COMPOSITION_END ('1'); | |
1919 | ||
4ed46869 | 1920 | if (coding->eol_type == CODING_EOL_CR) |
b73bfc1c | 1921 | c1 = '\n'; |
4ed46869 KH |
1922 | else if (coding->eol_type == CODING_EOL_CRLF) |
1923 | { | |
1924 | ONE_MORE_BYTE (c1); | |
b73bfc1c | 1925 | if (c1 != ISO_CODE_LF) |
4ed46869 KH |
1926 | { |
1927 | src--; | |
b73bfc1c | 1928 | c1 = '\r'; |
4ed46869 KH |
1929 | } |
1930 | } | |
b73bfc1c | 1931 | charset = CHARSET_ASCII; |
4ed46869 KH |
1932 | break; |
1933 | ||
1934 | case ISO_shift_out: | |
d46c5b12 KH |
1935 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
1936 | || CODING_SPEC_ISO_DESIGNATION (coding, 1) < 0) | |
1937 | goto label_invalid_code; | |
4ed46869 KH |
1938 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 1; |
1939 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
b73bfc1c | 1940 | continue; |
4ed46869 KH |
1941 | |
1942 | case ISO_shift_in: | |
d46c5b12 KH |
1943 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)) |
1944 | goto label_invalid_code; | |
4ed46869 KH |
1945 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; |
1946 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
b73bfc1c | 1947 | continue; |
4ed46869 KH |
1948 | |
1949 | case ISO_single_shift_2_7: | |
1950 | case ISO_single_shift_2: | |
d46c5b12 KH |
1951 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
1952 | goto label_invalid_code; | |
4ed46869 KH |
1953 | /* SS2 is handled as an escape sequence of ESC 'N' */ |
1954 | c1 = 'N'; | |
1955 | goto label_escape_sequence; | |
1956 | ||
1957 | case ISO_single_shift_3: | |
d46c5b12 KH |
1958 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
1959 | goto label_invalid_code; | |
4ed46869 KH |
1960 | /* SS2 is handled as an escape sequence of ESC 'O' */ |
1961 | c1 = 'O'; | |
1962 | goto label_escape_sequence; | |
1963 | ||
1964 | case ISO_control_sequence_introducer: | |
1965 | /* CSI is handled as an escape sequence of ESC '[' ... */ | |
1966 | c1 = '['; | |
1967 | goto label_escape_sequence; | |
1968 | ||
1969 | case ISO_escape: | |
1970 | ONE_MORE_BYTE (c1); | |
1971 | label_escape_sequence: | |
1972 | /* Escape sequences handled by Emacs are invocation, | |
1973 | designation, direction specification, and character | |
1974 | composition specification. */ | |
1975 | switch (c1) | |
1976 | { | |
1977 | case '&': /* revision of following character set */ | |
1978 | ONE_MORE_BYTE (c1); | |
1979 | if (!(c1 >= '@' && c1 <= '~')) | |
d46c5b12 | 1980 | goto label_invalid_code; |
4ed46869 KH |
1981 | ONE_MORE_BYTE (c1); |
1982 | if (c1 != ISO_CODE_ESC) | |
d46c5b12 | 1983 | goto label_invalid_code; |
4ed46869 KH |
1984 | ONE_MORE_BYTE (c1); |
1985 | goto label_escape_sequence; | |
1986 | ||
1987 | case '$': /* designation of 2-byte character set */ | |
d46c5b12 KH |
1988 | if (! (coding->flags & CODING_FLAG_ISO_DESIGNATION)) |
1989 | goto label_invalid_code; | |
4ed46869 KH |
1990 | ONE_MORE_BYTE (c1); |
1991 | if (c1 >= '@' && c1 <= 'B') | |
1992 | { /* designation of JISX0208.1978, GB2312.1980, | |
88993dfd | 1993 | or JISX0208.1980 */ |
4ed46869 KH |
1994 | DECODE_DESIGNATION (0, 2, 94, c1); |
1995 | } | |
1996 | else if (c1 >= 0x28 && c1 <= 0x2B) | |
1997 | { /* designation of DIMENSION2_CHARS94 character set */ | |
1998 | ONE_MORE_BYTE (c2); | |
1999 | DECODE_DESIGNATION (c1 - 0x28, 2, 94, c2); | |
2000 | } | |
2001 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
2002 | { /* designation of DIMENSION2_CHARS96 character set */ | |
2003 | ONE_MORE_BYTE (c2); | |
2004 | DECODE_DESIGNATION (c1 - 0x2C, 2, 96, c2); | |
2005 | } | |
2006 | else | |
d46c5b12 | 2007 | goto label_invalid_code; |
b73bfc1c KH |
2008 | /* We must update these variables now. */ |
2009 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
2010 | charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
2011 | continue; | |
4ed46869 KH |
2012 | |
2013 | case 'n': /* invocation of locking-shift-2 */ | |
d46c5b12 KH |
2014 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
2015 | || CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0) | |
2016 | goto label_invalid_code; | |
4ed46869 | 2017 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 2; |
e0e989f6 | 2018 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); |
b73bfc1c | 2019 | continue; |
4ed46869 KH |
2020 | |
2021 | case 'o': /* invocation of locking-shift-3 */ | |
d46c5b12 KH |
2022 | if (! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT) |
2023 | || CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0) | |
2024 | goto label_invalid_code; | |
4ed46869 | 2025 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 3; |
e0e989f6 | 2026 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); |
b73bfc1c | 2027 | continue; |
4ed46869 KH |
2028 | |
2029 | case 'N': /* invocation of single-shift-2 */ | |
d46c5b12 KH |
2030 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) |
2031 | || CODING_SPEC_ISO_DESIGNATION (coding, 2) < 0) | |
2032 | goto label_invalid_code; | |
4ed46869 | 2033 | charset = CODING_SPEC_ISO_DESIGNATION (coding, 2); |
b73bfc1c | 2034 | ONE_MORE_BYTE (c1); |
e7046a18 KH |
2035 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
2036 | goto label_invalid_code; | |
4ed46869 KH |
2037 | break; |
2038 | ||
2039 | case 'O': /* invocation of single-shift-3 */ | |
d46c5b12 KH |
2040 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) |
2041 | || CODING_SPEC_ISO_DESIGNATION (coding, 3) < 0) | |
2042 | goto label_invalid_code; | |
4ed46869 | 2043 | charset = CODING_SPEC_ISO_DESIGNATION (coding, 3); |
b73bfc1c | 2044 | ONE_MORE_BYTE (c1); |
e7046a18 KH |
2045 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
2046 | goto label_invalid_code; | |
4ed46869 KH |
2047 | break; |
2048 | ||
ec6d2bb8 KH |
2049 | case '0': case '2': case '3': case '4': /* start composition */ |
2050 | DECODE_COMPOSITION_START (c1); | |
b73bfc1c | 2051 | continue; |
4ed46869 | 2052 | |
ec6d2bb8 KH |
2053 | case '1': /* end composition */ |
2054 | DECODE_COMPOSITION_END (c1); | |
b73bfc1c | 2055 | continue; |
4ed46869 KH |
2056 | |
2057 | case '[': /* specification of direction */ | |
d46c5b12 KH |
2058 | if (coding->flags & CODING_FLAG_ISO_NO_DIRECTION) |
2059 | goto label_invalid_code; | |
4ed46869 | 2060 | /* For the moment, nested direction is not supported. |
d46c5b12 | 2061 | So, `coding->mode & CODING_MODE_DIRECTION' zero means |
8ca3766a | 2062 | left-to-right, and nonzero means right-to-left. */ |
4ed46869 KH |
2063 | ONE_MORE_BYTE (c1); |
2064 | switch (c1) | |
2065 | { | |
2066 | case ']': /* end of the current direction */ | |
d46c5b12 | 2067 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 KH |
2068 | |
2069 | case '0': /* end of the current direction */ | |
2070 | case '1': /* start of left-to-right direction */ | |
2071 | ONE_MORE_BYTE (c1); | |
2072 | if (c1 == ']') | |
d46c5b12 | 2073 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 | 2074 | else |
d46c5b12 | 2075 | goto label_invalid_code; |
4ed46869 KH |
2076 | break; |
2077 | ||
2078 | case '2': /* start of right-to-left direction */ | |
2079 | ONE_MORE_BYTE (c1); | |
2080 | if (c1 == ']') | |
d46c5b12 | 2081 | coding->mode |= CODING_MODE_DIRECTION; |
4ed46869 | 2082 | else |
d46c5b12 | 2083 | goto label_invalid_code; |
4ed46869 KH |
2084 | break; |
2085 | ||
2086 | default: | |
d46c5b12 | 2087 | goto label_invalid_code; |
4ed46869 | 2088 | } |
b73bfc1c | 2089 | continue; |
4ed46869 | 2090 | |
103e0180 KH |
2091 | case '%': |
2092 | if (COMPOSING_P (coding)) | |
2093 | DECODE_COMPOSITION_END ('1'); | |
2094 | ONE_MORE_BYTE (c1); | |
2095 | if (c1 == '/') | |
2096 | { | |
2097 | /* CTEXT extended segment: | |
2098 | ESC % / [0-4] M L --ENCODING-NAME-- \002 --BYTES-- | |
2099 | We keep these bytes as is for the moment. | |
2100 | They may be decoded by post-read-conversion. */ | |
2101 | int dim, M, L; | |
2102 | int size, required; | |
2103 | int produced_chars; | |
43e4a82f | 2104 | |
103e0180 KH |
2105 | ONE_MORE_BYTE (dim); |
2106 | ONE_MORE_BYTE (M); | |
2107 | ONE_MORE_BYTE (L); | |
2108 | size = ((M - 128) * 128) + (L - 128); | |
2109 | required = 8 + size * 2; | |
2110 | if (dst + required > (dst_bytes ? dst_end : src)) | |
2111 | goto label_end_of_loop; | |
2112 | *dst++ = ISO_CODE_ESC; | |
2113 | *dst++ = '%'; | |
2114 | *dst++ = '/'; | |
2115 | *dst++ = dim; | |
2116 | produced_chars = 4; | |
2117 | dst += CHAR_STRING (M, dst), produced_chars++; | |
2118 | dst += CHAR_STRING (L, dst), produced_chars++; | |
2119 | while (size-- > 0) | |
2120 | { | |
2121 | ONE_MORE_BYTE (c1); | |
2122 | dst += CHAR_STRING (c1, dst), produced_chars++; | |
2123 | } | |
2124 | coding->produced_char += produced_chars; | |
2125 | } | |
2126 | else if (c1 == 'G') | |
2127 | { | |
2128 | unsigned char *d = dst; | |
2129 | int produced_chars; | |
2130 | ||
2131 | /* XFree86 extension for embedding UTF-8 in CTEXT: | |
2132 | ESC % G --UTF-8-BYTES-- ESC % @ | |
2133 | We keep these bytes as is for the moment. | |
2134 | They may be decoded by post-read-conversion. */ | |
2135 | if (d + 6 > (dst_bytes ? dst_end : src)) | |
2136 | goto label_end_of_loop; | |
2137 | *d++ = ISO_CODE_ESC; | |
2138 | *d++ = '%'; | |
2139 | *d++ = 'G'; | |
2140 | produced_chars = 3; | |
2141 | while (d + 1 < (dst_bytes ? dst_end : src)) | |
2142 | { | |
2143 | ONE_MORE_BYTE (c1); | |
2144 | if (c1 == ISO_CODE_ESC | |
2145 | && src + 1 < src_end | |
2146 | && src[0] == '%' | |
2147 | && src[1] == '@') | |
47dc91ad KH |
2148 | { |
2149 | src += 2; | |
2150 | break; | |
2151 | } | |
103e0180 KH |
2152 | d += CHAR_STRING (c1, d), produced_chars++; |
2153 | } | |
2154 | if (d + 3 > (dst_bytes ? dst_end : src)) | |
2155 | goto label_end_of_loop; | |
2156 | *d++ = ISO_CODE_ESC; | |
2157 | *d++ = '%'; | |
2158 | *d++ = '@'; | |
2159 | dst = d; | |
2160 | coding->produced_char += produced_chars + 3; | |
2161 | } | |
2162 | else | |
2163 | goto label_invalid_code; | |
2164 | continue; | |
2165 | ||
4ed46869 | 2166 | default: |
d46c5b12 KH |
2167 | if (! (coding->flags & CODING_FLAG_ISO_DESIGNATION)) |
2168 | goto label_invalid_code; | |
4ed46869 KH |
2169 | if (c1 >= 0x28 && c1 <= 0x2B) |
2170 | { /* designation of DIMENSION1_CHARS94 character set */ | |
2171 | ONE_MORE_BYTE (c2); | |
2172 | DECODE_DESIGNATION (c1 - 0x28, 1, 94, c2); | |
2173 | } | |
2174 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
2175 | { /* designation of DIMENSION1_CHARS96 character set */ | |
2176 | ONE_MORE_BYTE (c2); | |
2177 | DECODE_DESIGNATION (c1 - 0x2C, 1, 96, c2); | |
2178 | } | |
2179 | else | |
b73bfc1c KH |
2180 | goto label_invalid_code; |
2181 | /* We must update these variables now. */ | |
2182 | charset0 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 0); | |
2183 | charset1 = CODING_SPEC_ISO_PLANE_CHARSET (coding, 1); | |
2184 | continue; | |
4ed46869 | 2185 | } |
b73bfc1c | 2186 | } |
4ed46869 | 2187 | |
b73bfc1c KH |
2188 | /* Now we know CHARSET and 1st position code C1 of a character. |
2189 | Produce a multibyte sequence for that character while getting | |
2190 | 2nd position code C2 if necessary. */ | |
2191 | if (CHARSET_DIMENSION (charset) == 2) | |
2192 | { | |
2193 | ONE_MORE_BYTE (c2); | |
2194 | if (c1 < 0x80 ? c2 < 0x20 || c2 >= 0x80 : c2 < 0xA0) | |
2195 | /* C2 is not in a valid range. */ | |
2196 | goto label_invalid_code; | |
4ed46869 | 2197 | } |
b73bfc1c KH |
2198 | c = DECODE_ISO_CHARACTER (charset, c1, c2); |
2199 | EMIT_CHAR (c); | |
4ed46869 KH |
2200 | continue; |
2201 | ||
b73bfc1c KH |
2202 | label_invalid_code: |
2203 | coding->errors++; | |
2204 | if (COMPOSING_P (coding)) | |
2205 | DECODE_COMPOSITION_END ('1'); | |
4ed46869 | 2206 | src = src_base; |
b73bfc1c | 2207 | c = *src++; |
2d4430a8 KH |
2208 | if (! NILP (translation_table)) |
2209 | c = translate_char (translation_table, c, 0, 0, 0); | |
b73bfc1c | 2210 | EMIT_CHAR (c); |
4ed46869 | 2211 | } |
fb88bf2d | 2212 | |
b73bfc1c KH |
2213 | label_end_of_loop: |
2214 | coding->consumed = coding->consumed_char = src_base - source; | |
d46c5b12 | 2215 | coding->produced = dst - destination; |
b73bfc1c | 2216 | return; |
4ed46869 KH |
2217 | } |
2218 | ||
b73bfc1c | 2219 | |
f4dee582 | 2220 | /* ISO2022 encoding stuff. */ |
4ed46869 KH |
2221 | |
2222 | /* | |
f4dee582 | 2223 | It is not enough to say just "ISO2022" on encoding, we have to |
cfb43547 | 2224 | specify more details. In Emacs, each ISO2022 coding system |
4ed46869 | 2225 | variant has the following specifications: |
8ca3766a | 2226 | 1. Initial designation to G0 through G3. |
4ed46869 KH |
2227 | 2. Allows short-form designation? |
2228 | 3. ASCII should be designated to G0 before control characters? | |
2229 | 4. ASCII should be designated to G0 at end of line? | |
2230 | 5. 7-bit environment or 8-bit environment? | |
2231 | 6. Use locking-shift? | |
2232 | 7. Use Single-shift? | |
2233 | And the following two are only for Japanese: | |
2234 | 8. Use ASCII in place of JIS0201-1976-Roman? | |
2235 | 9. Use JISX0208-1983 in place of JISX0208-1978? | |
2236 | These specifications are encoded in `coding->flags' as flag bits | |
2237 | defined by macros CODING_FLAG_ISO_XXX. See `coding.h' for more | |
f4dee582 | 2238 | details. |
4ed46869 KH |
2239 | */ |
2240 | ||
2241 | /* Produce codes (escape sequence) for designating CHARSET to graphic | |
b73bfc1c KH |
2242 | register REG at DST, and increment DST. If <final-char> of CHARSET is |
2243 | '@', 'A', or 'B' and the coding system CODING allows, produce | |
2244 | designation sequence of short-form. */ | |
4ed46869 KH |
2245 | |
2246 | #define ENCODE_DESIGNATION(charset, reg, coding) \ | |
2247 | do { \ | |
2248 | unsigned char final_char = CHARSET_ISO_FINAL_CHAR (charset); \ | |
2249 | char *intermediate_char_94 = "()*+"; \ | |
2250 | char *intermediate_char_96 = ",-./"; \ | |
70c22245 | 2251 | int revision = CODING_SPEC_ISO_REVISION_NUMBER(coding, charset); \ |
b73bfc1c | 2252 | \ |
70c22245 KH |
2253 | if (revision < 255) \ |
2254 | { \ | |
4ed46869 KH |
2255 | *dst++ = ISO_CODE_ESC; \ |
2256 | *dst++ = '&'; \ | |
70c22245 | 2257 | *dst++ = '@' + revision; \ |
4ed46869 | 2258 | } \ |
b73bfc1c | 2259 | *dst++ = ISO_CODE_ESC; \ |
4ed46869 KH |
2260 | if (CHARSET_DIMENSION (charset) == 1) \ |
2261 | { \ | |
2262 | if (CHARSET_CHARS (charset) == 94) \ | |
2263 | *dst++ = (unsigned char) (intermediate_char_94[reg]); \ | |
2264 | else \ | |
2265 | *dst++ = (unsigned char) (intermediate_char_96[reg]); \ | |
2266 | } \ | |
2267 | else \ | |
2268 | { \ | |
2269 | *dst++ = '$'; \ | |
2270 | if (CHARSET_CHARS (charset) == 94) \ | |
2271 | { \ | |
b73bfc1c KH |
2272 | if (! (coding->flags & CODING_FLAG_ISO_SHORT_FORM) \ |
2273 | || reg != 0 \ | |
2274 | || final_char < '@' || final_char > 'B') \ | |
4ed46869 KH |
2275 | *dst++ = (unsigned char) (intermediate_char_94[reg]); \ |
2276 | } \ | |
2277 | else \ | |
b73bfc1c | 2278 | *dst++ = (unsigned char) (intermediate_char_96[reg]); \ |
4ed46869 | 2279 | } \ |
b73bfc1c | 2280 | *dst++ = final_char; \ |
4ed46869 KH |
2281 | CODING_SPEC_ISO_DESIGNATION (coding, reg) = charset; \ |
2282 | } while (0) | |
2283 | ||
2284 | /* The following two macros produce codes (control character or escape | |
2285 | sequence) for ISO2022 single-shift functions (single-shift-2 and | |
2286 | single-shift-3). */ | |
2287 | ||
2288 | #define ENCODE_SINGLE_SHIFT_2 \ | |
2289 | do { \ | |
2290 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2291 | *dst++ = ISO_CODE_ESC, *dst++ = 'N'; \ | |
2292 | else \ | |
b73bfc1c | 2293 | *dst++ = ISO_CODE_SS2; \ |
4ed46869 KH |
2294 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 1; \ |
2295 | } while (0) | |
2296 | ||
fb88bf2d KH |
2297 | #define ENCODE_SINGLE_SHIFT_3 \ |
2298 | do { \ | |
4ed46869 | 2299 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ |
fb88bf2d KH |
2300 | *dst++ = ISO_CODE_ESC, *dst++ = 'O'; \ |
2301 | else \ | |
b73bfc1c | 2302 | *dst++ = ISO_CODE_SS3; \ |
4ed46869 KH |
2303 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 1; \ |
2304 | } while (0) | |
2305 | ||
2306 | /* The following four macros produce codes (control character or | |
2307 | escape sequence) for ISO2022 locking-shift functions (shift-in, | |
2308 | shift-out, locking-shift-2, and locking-shift-3). */ | |
2309 | ||
b73bfc1c KH |
2310 | #define ENCODE_SHIFT_IN \ |
2311 | do { \ | |
2312 | *dst++ = ISO_CODE_SI; \ | |
4ed46869 KH |
2313 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; \ |
2314 | } while (0) | |
2315 | ||
b73bfc1c KH |
2316 | #define ENCODE_SHIFT_OUT \ |
2317 | do { \ | |
2318 | *dst++ = ISO_CODE_SO; \ | |
4ed46869 KH |
2319 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 1; \ |
2320 | } while (0) | |
2321 | ||
2322 | #define ENCODE_LOCKING_SHIFT_2 \ | |
2323 | do { \ | |
2324 | *dst++ = ISO_CODE_ESC, *dst++ = 'n'; \ | |
2325 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 2; \ | |
2326 | } while (0) | |
2327 | ||
b73bfc1c KH |
2328 | #define ENCODE_LOCKING_SHIFT_3 \ |
2329 | do { \ | |
2330 | *dst++ = ISO_CODE_ESC, *dst++ = 'o'; \ | |
4ed46869 KH |
2331 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 3; \ |
2332 | } while (0) | |
2333 | ||
f4dee582 RS |
2334 | /* Produce codes for a DIMENSION1 character whose character set is |
2335 | CHARSET and whose position-code is C1. Designation and invocation | |
4ed46869 KH |
2336 | sequences are also produced in advance if necessary. */ |
2337 | ||
6e85d753 KH |
2338 | #define ENCODE_ISO_CHARACTER_DIMENSION1(charset, c1) \ |
2339 | do { \ | |
2340 | if (CODING_SPEC_ISO_SINGLE_SHIFTING (coding)) \ | |
2341 | { \ | |
2342 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2343 | *dst++ = c1 & 0x7F; \ | |
2344 | else \ | |
2345 | *dst++ = c1 | 0x80; \ | |
2346 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
2347 | break; \ | |
2348 | } \ | |
2349 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 0)) \ | |
2350 | { \ | |
2351 | *dst++ = c1 & 0x7F; \ | |
2352 | break; \ | |
2353 | } \ | |
2354 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 1)) \ | |
2355 | { \ | |
2356 | *dst++ = c1 | 0x80; \ | |
2357 | break; \ | |
2358 | } \ | |
6e85d753 KH |
2359 | else \ |
2360 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
2361 | must invoke it, or, at first, designate it to some graphic \ | |
2362 | register. Then repeat the loop to actually produce the \ | |
2363 | character. */ \ | |
2364 | dst = encode_invocation_designation (charset, coding, dst); \ | |
4ed46869 KH |
2365 | } while (1) |
2366 | ||
f4dee582 RS |
2367 | /* Produce codes for a DIMENSION2 character whose character set is |
2368 | CHARSET and whose position-codes are C1 and C2. Designation and | |
4ed46869 KH |
2369 | invocation codes are also produced in advance if necessary. */ |
2370 | ||
6e85d753 KH |
2371 | #define ENCODE_ISO_CHARACTER_DIMENSION2(charset, c1, c2) \ |
2372 | do { \ | |
2373 | if (CODING_SPEC_ISO_SINGLE_SHIFTING (coding)) \ | |
2374 | { \ | |
2375 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) \ | |
2376 | *dst++ = c1 & 0x7F, *dst++ = c2 & 0x7F; \ | |
2377 | else \ | |
2378 | *dst++ = c1 | 0x80, *dst++ = c2 | 0x80; \ | |
2379 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
2380 | break; \ | |
2381 | } \ | |
2382 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 0)) \ | |
2383 | { \ | |
2384 | *dst++ = c1 & 0x7F, *dst++= c2 & 0x7F; \ | |
2385 | break; \ | |
2386 | } \ | |
2387 | else if (charset == CODING_SPEC_ISO_PLANE_CHARSET (coding, 1)) \ | |
2388 | { \ | |
2389 | *dst++ = c1 | 0x80, *dst++= c2 | 0x80; \ | |
2390 | break; \ | |
2391 | } \ | |
6e85d753 KH |
2392 | else \ |
2393 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
2394 | must invoke it, or, at first, designate it to some graphic \ | |
2395 | register. Then repeat the loop to actually produce the \ | |
2396 | character. */ \ | |
2397 | dst = encode_invocation_designation (charset, coding, dst); \ | |
4ed46869 KH |
2398 | } while (1) |
2399 | ||
05e6f5dc KH |
2400 | #define ENCODE_ISO_CHARACTER(c) \ |
2401 | do { \ | |
2402 | int charset, c1, c2; \ | |
2403 | \ | |
2404 | SPLIT_CHAR (c, charset, c1, c2); \ | |
2405 | if (CHARSET_DEFINED_P (charset)) \ | |
2406 | { \ | |
2407 | if (CHARSET_DIMENSION (charset) == 1) \ | |
2408 | { \ | |
2409 | if (charset == CHARSET_ASCII \ | |
2410 | && coding->flags & CODING_FLAG_ISO_USE_ROMAN) \ | |
2411 | charset = charset_latin_jisx0201; \ | |
2412 | ENCODE_ISO_CHARACTER_DIMENSION1 (charset, c1); \ | |
2413 | } \ | |
2414 | else \ | |
2415 | { \ | |
2416 | if (charset == charset_jisx0208 \ | |
2417 | && coding->flags & CODING_FLAG_ISO_USE_OLDJIS) \ | |
2418 | charset = charset_jisx0208_1978; \ | |
2419 | ENCODE_ISO_CHARACTER_DIMENSION2 (charset, c1, c2); \ | |
2420 | } \ | |
2421 | } \ | |
2422 | else \ | |
2423 | { \ | |
2424 | *dst++ = c1; \ | |
2425 | if (c2 >= 0) \ | |
2426 | *dst++ = c2; \ | |
2427 | } \ | |
2428 | } while (0) | |
2429 | ||
2430 | ||
2431 | /* Instead of encoding character C, produce one or two `?'s. */ | |
2432 | ||
0eecad43 KH |
2433 | #define ENCODE_UNSAFE_CHARACTER(c) \ |
2434 | do { \ | |
2435 | ENCODE_ISO_CHARACTER (CODING_REPLACEMENT_CHARACTER); \ | |
2436 | if (CHARSET_WIDTH (CHAR_CHARSET (c)) > 1) \ | |
2437 | ENCODE_ISO_CHARACTER (CODING_REPLACEMENT_CHARACTER); \ | |
84fbb8a0 | 2438 | } while (0) |
bdd9fb48 | 2439 | |
05e6f5dc | 2440 | |
4ed46869 KH |
2441 | /* Produce designation and invocation codes at a place pointed by DST |
2442 | to use CHARSET. The element `spec.iso2022' of *CODING is updated. | |
2443 | Return new DST. */ | |
2444 | ||
2445 | unsigned char * | |
2446 | encode_invocation_designation (charset, coding, dst) | |
2447 | int charset; | |
2448 | struct coding_system *coding; | |
2449 | unsigned char *dst; | |
2450 | { | |
2451 | int reg; /* graphic register number */ | |
2452 | ||
2453 | /* At first, check designations. */ | |
2454 | for (reg = 0; reg < 4; reg++) | |
2455 | if (charset == CODING_SPEC_ISO_DESIGNATION (coding, reg)) | |
2456 | break; | |
2457 | ||
2458 | if (reg >= 4) | |
2459 | { | |
2460 | /* CHARSET is not yet designated to any graphic registers. */ | |
2461 | /* At first check the requested designation. */ | |
2462 | reg = CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset); | |
1ba9e4ab KH |
2463 | if (reg == CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION) |
2464 | /* Since CHARSET requests no special designation, designate it | |
2465 | to graphic register 0. */ | |
4ed46869 KH |
2466 | reg = 0; |
2467 | ||
2468 | ENCODE_DESIGNATION (charset, reg, coding); | |
2469 | } | |
2470 | ||
2471 | if (CODING_SPEC_ISO_INVOCATION (coding, 0) != reg | |
2472 | && CODING_SPEC_ISO_INVOCATION (coding, 1) != reg) | |
2473 | { | |
2474 | /* Since the graphic register REG is not invoked to any graphic | |
2475 | planes, invoke it to graphic plane 0. */ | |
2476 | switch (reg) | |
2477 | { | |
2478 | case 0: /* graphic register 0 */ | |
2479 | ENCODE_SHIFT_IN; | |
2480 | break; | |
2481 | ||
2482 | case 1: /* graphic register 1 */ | |
2483 | ENCODE_SHIFT_OUT; | |
2484 | break; | |
2485 | ||
2486 | case 2: /* graphic register 2 */ | |
2487 | if (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) | |
2488 | ENCODE_SINGLE_SHIFT_2; | |
2489 | else | |
2490 | ENCODE_LOCKING_SHIFT_2; | |
2491 | break; | |
2492 | ||
2493 | case 3: /* graphic register 3 */ | |
2494 | if (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT) | |
2495 | ENCODE_SINGLE_SHIFT_3; | |
2496 | else | |
2497 | ENCODE_LOCKING_SHIFT_3; | |
2498 | break; | |
2499 | } | |
2500 | } | |
b73bfc1c | 2501 | |
4ed46869 KH |
2502 | return dst; |
2503 | } | |
2504 | ||
ec6d2bb8 KH |
2505 | /* Produce 2-byte codes for encoded composition rule RULE. */ |
2506 | ||
2507 | #define ENCODE_COMPOSITION_RULE(rule) \ | |
2508 | do { \ | |
2509 | int gref, nref; \ | |
2510 | COMPOSITION_DECODE_RULE (rule, gref, nref); \ | |
2511 | *dst++ = 32 + 81 + gref; \ | |
2512 | *dst++ = 32 + nref; \ | |
2513 | } while (0) | |
2514 | ||
2515 | /* Produce codes for indicating the start of a composition sequence | |
2516 | (ESC 0, ESC 3, or ESC 4). DATA points to an array of integers | |
2517 | which specify information about the composition. See the comment | |
2518 | in coding.h for the format of DATA. */ | |
2519 | ||
2520 | #define ENCODE_COMPOSITION_START(coding, data) \ | |
2521 | do { \ | |
2522 | coding->composing = data[3]; \ | |
2523 | *dst++ = ISO_CODE_ESC; \ | |
2524 | if (coding->composing == COMPOSITION_RELATIVE) \ | |
2525 | *dst++ = '0'; \ | |
2526 | else \ | |
2527 | { \ | |
2528 | *dst++ = (coding->composing == COMPOSITION_WITH_ALTCHARS \ | |
2529 | ? '3' : '4'); \ | |
2530 | coding->cmp_data_index = coding->cmp_data_start + 4; \ | |
2531 | coding->composition_rule_follows = 0; \ | |
2532 | } \ | |
2533 | } while (0) | |
2534 | ||
2535 | /* Produce codes for indicating the end of the current composition. */ | |
2536 | ||
2537 | #define ENCODE_COMPOSITION_END(coding, data) \ | |
2538 | do { \ | |
2539 | *dst++ = ISO_CODE_ESC; \ | |
2540 | *dst++ = '1'; \ | |
2541 | coding->cmp_data_start += data[0]; \ | |
2542 | coding->composing = COMPOSITION_NO; \ | |
2543 | if (coding->cmp_data_start == coding->cmp_data->used \ | |
2544 | && coding->cmp_data->next) \ | |
2545 | { \ | |
2546 | coding->cmp_data = coding->cmp_data->next; \ | |
2547 | coding->cmp_data_start = 0; \ | |
2548 | } \ | |
2549 | } while (0) | |
2550 | ||
2551 | /* Produce composition start sequence ESC 0. Here, this sequence | |
2552 | doesn't mean the start of a new composition but means that we have | |
2553 | just produced components (alternate chars and composition rules) of | |
2554 | the composition and the actual text follows in SRC. */ | |
2555 | ||
2556 | #define ENCODE_COMPOSITION_FAKE_START(coding) \ | |
2557 | do { \ | |
2558 | *dst++ = ISO_CODE_ESC; \ | |
2559 | *dst++ = '0'; \ | |
2560 | coding->composing = COMPOSITION_RELATIVE; \ | |
2561 | } while (0) | |
4ed46869 KH |
2562 | |
2563 | /* The following three macros produce codes for indicating direction | |
2564 | of text. */ | |
b73bfc1c KH |
2565 | #define ENCODE_CONTROL_SEQUENCE_INTRODUCER \ |
2566 | do { \ | |
4ed46869 | 2567 | if (coding->flags == CODING_FLAG_ISO_SEVEN_BITS) \ |
b73bfc1c KH |
2568 | *dst++ = ISO_CODE_ESC, *dst++ = '['; \ |
2569 | else \ | |
2570 | *dst++ = ISO_CODE_CSI; \ | |
4ed46869 KH |
2571 | } while (0) |
2572 | ||
2573 | #define ENCODE_DIRECTION_R2L \ | |
b73bfc1c | 2574 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst), *dst++ = '2', *dst++ = ']' |
4ed46869 KH |
2575 | |
2576 | #define ENCODE_DIRECTION_L2R \ | |
b73bfc1c | 2577 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst), *dst++ = '0', *dst++ = ']' |
4ed46869 KH |
2578 | |
2579 | /* Produce codes for designation and invocation to reset the graphic | |
2580 | planes and registers to initial state. */ | |
e0e989f6 KH |
2581 | #define ENCODE_RESET_PLANE_AND_REGISTER \ |
2582 | do { \ | |
2583 | int reg; \ | |
2584 | if (CODING_SPEC_ISO_INVOCATION (coding, 0) != 0) \ | |
2585 | ENCODE_SHIFT_IN; \ | |
2586 | for (reg = 0; reg < 4; reg++) \ | |
2587 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg) >= 0 \ | |
2588 | && (CODING_SPEC_ISO_DESIGNATION (coding, reg) \ | |
2589 | != CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg))) \ | |
2590 | ENCODE_DESIGNATION \ | |
2591 | (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, reg), reg, coding); \ | |
4ed46869 KH |
2592 | } while (0) |
2593 | ||
bdd9fb48 | 2594 | /* Produce designation sequences of charsets in the line started from |
b73bfc1c | 2595 | SRC to a place pointed by DST, and return updated DST. |
bdd9fb48 KH |
2596 | |
2597 | If the current block ends before any end-of-line, we may fail to | |
d46c5b12 KH |
2598 | find all the necessary designations. */ |
2599 | ||
b73bfc1c KH |
2600 | static unsigned char * |
2601 | encode_designation_at_bol (coding, translation_table, src, src_end, dst) | |
e0e989f6 | 2602 | struct coding_system *coding; |
b73bfc1c | 2603 | Lisp_Object translation_table; |
5bdca8af DN |
2604 | const unsigned char *src, *src_end; |
2605 | unsigned char *dst; | |
e0e989f6 | 2606 | { |
bdd9fb48 KH |
2607 | int charset, c, found = 0, reg; |
2608 | /* Table of charsets to be designated to each graphic register. */ | |
2609 | int r[4]; | |
bdd9fb48 KH |
2610 | |
2611 | for (reg = 0; reg < 4; reg++) | |
2612 | r[reg] = -1; | |
2613 | ||
b73bfc1c | 2614 | while (found < 4) |
e0e989f6 | 2615 | { |
b73bfc1c KH |
2616 | ONE_MORE_CHAR (c); |
2617 | if (c == '\n') | |
2618 | break; | |
93dec019 | 2619 | |
b73bfc1c | 2620 | charset = CHAR_CHARSET (c); |
e0e989f6 | 2621 | reg = CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset); |
d46c5b12 | 2622 | if (reg != CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION && r[reg] < 0) |
bdd9fb48 KH |
2623 | { |
2624 | found++; | |
2625 | r[reg] = charset; | |
2626 | } | |
bdd9fb48 KH |
2627 | } |
2628 | ||
b73bfc1c | 2629 | label_end_of_loop: |
bdd9fb48 KH |
2630 | if (found) |
2631 | { | |
2632 | for (reg = 0; reg < 4; reg++) | |
2633 | if (r[reg] >= 0 | |
2634 | && CODING_SPEC_ISO_DESIGNATION (coding, reg) != r[reg]) | |
2635 | ENCODE_DESIGNATION (r[reg], reg, coding); | |
e0e989f6 | 2636 | } |
b73bfc1c KH |
2637 | |
2638 | return dst; | |
e0e989f6 KH |
2639 | } |
2640 | ||
4ed46869 KH |
2641 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */ |
2642 | ||
b73bfc1c | 2643 | static void |
d46c5b12 | 2644 | encode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 2645 | struct coding_system *coding; |
5bdca8af DN |
2646 | const unsigned char *source; |
2647 | unsigned char *destination; | |
4ed46869 | 2648 | int src_bytes, dst_bytes; |
4ed46869 | 2649 | { |
5bdca8af DN |
2650 | const unsigned char *src = source; |
2651 | const unsigned char *src_end = source + src_bytes; | |
4ed46869 KH |
2652 | unsigned char *dst = destination; |
2653 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c | 2654 | /* Since the maximum bytes produced by each loop is 20, we subtract 19 |
4ed46869 KH |
2655 | from DST_END to assure overflow checking is necessary only at the |
2656 | head of loop. */ | |
b73bfc1c KH |
2657 | unsigned char *adjusted_dst_end = dst_end - 19; |
2658 | /* SRC_BASE remembers the start position in source in each loop. | |
2659 | The loop will be exited when there's not enough source text to | |
2660 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
2661 | there's not enough destination area to produce encoded codes | |
2662 | (within macro EMIT_BYTES). */ | |
5bdca8af | 2663 | const unsigned char *src_base; |
b73bfc1c KH |
2664 | int c; |
2665 | Lisp_Object translation_table; | |
05e6f5dc KH |
2666 | Lisp_Object safe_chars; |
2667 | ||
0eecad43 KH |
2668 | if (coding->flags & CODING_FLAG_ISO_SAFE) |
2669 | coding->mode |= CODING_MODE_INHIBIT_UNENCODABLE_CHAR; | |
2670 | ||
6b89e3aa | 2671 | safe_chars = coding_safe_chars (coding->symbol); |
bdd9fb48 | 2672 | |
b73bfc1c KH |
2673 | if (NILP (Venable_character_translation)) |
2674 | translation_table = Qnil; | |
2675 | else | |
2676 | { | |
2677 | translation_table = coding->translation_table_for_encode; | |
2678 | if (NILP (translation_table)) | |
2679 | translation_table = Vstandard_translation_table_for_encode; | |
2680 | } | |
4ed46869 | 2681 | |
d46c5b12 | 2682 | coding->consumed_char = 0; |
b73bfc1c KH |
2683 | coding->errors = 0; |
2684 | while (1) | |
4ed46869 | 2685 | { |
b73bfc1c KH |
2686 | src_base = src; |
2687 | ||
2688 | if (dst >= (dst_bytes ? adjusted_dst_end : (src - 19))) | |
2689 | { | |
2690 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
2691 | break; | |
2692 | } | |
4ed46869 | 2693 | |
e0e989f6 KH |
2694 | if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL |
2695 | && CODING_SPEC_ISO_BOL (coding)) | |
2696 | { | |
bdd9fb48 | 2697 | /* We have to produce designation sequences if any now. */ |
b73bfc1c KH |
2698 | dst = encode_designation_at_bol (coding, translation_table, |
2699 | src, src_end, dst); | |
e0e989f6 KH |
2700 | CODING_SPEC_ISO_BOL (coding) = 0; |
2701 | } | |
2702 | ||
ec6d2bb8 KH |
2703 | /* Check composition start and end. */ |
2704 | if (coding->composing != COMPOSITION_DISABLED | |
2705 | && coding->cmp_data_start < coding->cmp_data->used) | |
4ed46869 | 2706 | { |
ec6d2bb8 KH |
2707 | struct composition_data *cmp_data = coding->cmp_data; |
2708 | int *data = cmp_data->data + coding->cmp_data_start; | |
2709 | int this_pos = cmp_data->char_offset + coding->consumed_char; | |
2710 | ||
2711 | if (coding->composing == COMPOSITION_RELATIVE) | |
4ed46869 | 2712 | { |
ec6d2bb8 KH |
2713 | if (this_pos == data[2]) |
2714 | { | |
2715 | ENCODE_COMPOSITION_END (coding, data); | |
2716 | cmp_data = coding->cmp_data; | |
2717 | data = cmp_data->data + coding->cmp_data_start; | |
2718 | } | |
4ed46869 | 2719 | } |
ec6d2bb8 | 2720 | else if (COMPOSING_P (coding)) |
4ed46869 | 2721 | { |
ec6d2bb8 KH |
2722 | /* COMPOSITION_WITH_ALTCHARS or COMPOSITION_WITH_RULE_ALTCHAR */ |
2723 | if (coding->cmp_data_index == coding->cmp_data_start + data[0]) | |
2724 | /* We have consumed components of the composition. | |
8ca3766a | 2725 | What follows in SRC is the composition's base |
ec6d2bb8 KH |
2726 | text. */ |
2727 | ENCODE_COMPOSITION_FAKE_START (coding); | |
2728 | else | |
4ed46869 | 2729 | { |
ec6d2bb8 KH |
2730 | int c = cmp_data->data[coding->cmp_data_index++]; |
2731 | if (coding->composition_rule_follows) | |
2732 | { | |
2733 | ENCODE_COMPOSITION_RULE (c); | |
2734 | coding->composition_rule_follows = 0; | |
2735 | } | |
2736 | else | |
2737 | { | |
0eecad43 | 2738 | if (coding->mode & CODING_MODE_INHIBIT_UNENCODABLE_CHAR |
05e6f5dc KH |
2739 | && ! CODING_SAFE_CHAR_P (safe_chars, c)) |
2740 | ENCODE_UNSAFE_CHARACTER (c); | |
2741 | else | |
2742 | ENCODE_ISO_CHARACTER (c); | |
ec6d2bb8 KH |
2743 | if (coding->composing == COMPOSITION_WITH_RULE_ALTCHARS) |
2744 | coding->composition_rule_follows = 1; | |
2745 | } | |
4ed46869 KH |
2746 | continue; |
2747 | } | |
ec6d2bb8 KH |
2748 | } |
2749 | if (!COMPOSING_P (coding)) | |
2750 | { | |
2751 | if (this_pos == data[1]) | |
4ed46869 | 2752 | { |
ec6d2bb8 KH |
2753 | ENCODE_COMPOSITION_START (coding, data); |
2754 | continue; | |
4ed46869 | 2755 | } |
4ed46869 KH |
2756 | } |
2757 | } | |
ec6d2bb8 | 2758 | |
b73bfc1c | 2759 | ONE_MORE_CHAR (c); |
4ed46869 | 2760 | |
b73bfc1c KH |
2761 | /* Now encode the character C. */ |
2762 | if (c < 0x20 || c == 0x7F) | |
2763 | { | |
2764 | if (c == '\r') | |
19a8d9e0 | 2765 | { |
b73bfc1c KH |
2766 | if (! (coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) |
2767 | { | |
2768 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL) | |
2769 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2770 | *dst++ = c; | |
2771 | continue; | |
2772 | } | |
2773 | /* fall down to treat '\r' as '\n' ... */ | |
2774 | c = '\n'; | |
19a8d9e0 | 2775 | } |
b73bfc1c | 2776 | if (c == '\n') |
19a8d9e0 | 2777 | { |
b73bfc1c KH |
2778 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_EOL) |
2779 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2780 | if (coding->flags & CODING_FLAG_ISO_INIT_AT_BOL) | |
2781 | bcopy (coding->spec.iso2022.initial_designation, | |
2782 | coding->spec.iso2022.current_designation, | |
2783 | sizeof coding->spec.iso2022.initial_designation); | |
2784 | if (coding->eol_type == CODING_EOL_LF | |
2785 | || coding->eol_type == CODING_EOL_UNDECIDED) | |
2786 | *dst++ = ISO_CODE_LF; | |
2787 | else if (coding->eol_type == CODING_EOL_CRLF) | |
2788 | *dst++ = ISO_CODE_CR, *dst++ = ISO_CODE_LF; | |
2789 | else | |
2790 | *dst++ = ISO_CODE_CR; | |
2791 | CODING_SPEC_ISO_BOL (coding) = 1; | |
19a8d9e0 | 2792 | } |
93dec019 | 2793 | else |
19a8d9e0 | 2794 | { |
b73bfc1c KH |
2795 | if (coding->flags & CODING_FLAG_ISO_RESET_AT_CNTL) |
2796 | ENCODE_RESET_PLANE_AND_REGISTER; | |
2797 | *dst++ = c; | |
19a8d9e0 | 2798 | } |
4ed46869 | 2799 | } |
b73bfc1c | 2800 | else if (ASCII_BYTE_P (c)) |
05e6f5dc | 2801 | ENCODE_ISO_CHARACTER (c); |
b73bfc1c | 2802 | else if (SINGLE_BYTE_CHAR_P (c)) |
88993dfd | 2803 | { |
b73bfc1c KH |
2804 | *dst++ = c; |
2805 | coding->errors++; | |
88993dfd | 2806 | } |
0eecad43 | 2807 | else if (coding->mode & CODING_MODE_INHIBIT_UNENCODABLE_CHAR |
05e6f5dc KH |
2808 | && ! CODING_SAFE_CHAR_P (safe_chars, c)) |
2809 | ENCODE_UNSAFE_CHARACTER (c); | |
b73bfc1c | 2810 | else |
05e6f5dc | 2811 | ENCODE_ISO_CHARACTER (c); |
b73bfc1c KH |
2812 | |
2813 | coding->consumed_char++; | |
84fbb8a0 | 2814 | } |
b73bfc1c KH |
2815 | |
2816 | label_end_of_loop: | |
2817 | coding->consumed = src_base - source; | |
d46c5b12 | 2818 | coding->produced = coding->produced_char = dst - destination; |
4ed46869 KH |
2819 | } |
2820 | ||
2821 | \f | |
2822 | /*** 4. SJIS and BIG5 handlers ***/ | |
2823 | ||
cfb43547 | 2824 | /* Although SJIS and BIG5 are not ISO coding systems, they are used |
4ed46869 KH |
2825 | quite widely. So, for the moment, Emacs supports them in the bare |
2826 | C code. But, in the future, they may be supported only by CCL. */ | |
2827 | ||
2828 | /* SJIS is a coding system encoding three character sets: ASCII, right | |
2829 | half of JISX0201-Kana, and JISX0208. An ASCII character is encoded | |
2830 | as is. A character of charset katakana-jisx0201 is encoded by | |
2831 | "position-code + 0x80". A character of charset japanese-jisx0208 | |
2832 | is encoded in 2-byte but two position-codes are divided and shifted | |
cfb43547 | 2833 | so that it fits in the range below. |
4ed46869 KH |
2834 | |
2835 | --- CODE RANGE of SJIS --- | |
2836 | (character set) (range) | |
2837 | ASCII 0x00 .. 0x7F | |
682169fe | 2838 | KATAKANA-JISX0201 0xA1 .. 0xDF |
c28a9453 | 2839 | JISX0208 (1st byte) 0x81 .. 0x9F and 0xE0 .. 0xEF |
d14d03ac | 2840 | (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC |
4ed46869 KH |
2841 | ------------------------------- |
2842 | ||
2843 | */ | |
2844 | ||
2845 | /* BIG5 is a coding system encoding two character sets: ASCII and | |
2846 | Big5. An ASCII character is encoded as is. Big5 is a two-byte | |
cfb43547 | 2847 | character set and is encoded in two bytes. |
4ed46869 KH |
2848 | |
2849 | --- CODE RANGE of BIG5 --- | |
2850 | (character set) (range) | |
2851 | ASCII 0x00 .. 0x7F | |
2852 | Big5 (1st byte) 0xA1 .. 0xFE | |
2853 | (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE | |
2854 | -------------------------- | |
2855 | ||
2856 | Since the number of characters in Big5 is larger than maximum | |
2857 | characters in Emacs' charset (96x96), it can't be handled as one | |
2858 | charset. So, in Emacs, Big5 is divided into two: `charset-big5-1' | |
2859 | and `charset-big5-2'. Both are DIMENSION2 and CHARS94. The former | |
2860 | contains frequently used characters and the latter contains less | |
2861 | frequently used characters. */ | |
2862 | ||
2863 | /* Macros to decode or encode a character of Big5 in BIG5. B1 and B2 | |
2864 | are the 1st and 2nd position-codes of Big5 in BIG5 coding system. | |
f458a8e0 | 2865 | C1 and C2 are the 1st and 2nd position-codes of Emacs' internal |
4ed46869 KH |
2866 | format. CHARSET is `charset_big5_1' or `charset_big5_2'. */ |
2867 | ||
2868 | /* Number of Big5 characters which have the same code in 1st byte. */ | |
2869 | #define BIG5_SAME_ROW (0xFF - 0xA1 + 0x7F - 0x40) | |
2870 | ||
2871 | #define DECODE_BIG5(b1, b2, charset, c1, c2) \ | |
2872 | do { \ | |
2873 | unsigned int temp \ | |
2874 | = (b1 - 0xA1) * BIG5_SAME_ROW + b2 - (b2 < 0x7F ? 0x40 : 0x62); \ | |
2875 | if (b1 < 0xC9) \ | |
2876 | charset = charset_big5_1; \ | |
2877 | else \ | |
2878 | { \ | |
2879 | charset = charset_big5_2; \ | |
2880 | temp -= (0xC9 - 0xA1) * BIG5_SAME_ROW; \ | |
2881 | } \ | |
2882 | c1 = temp / (0xFF - 0xA1) + 0x21; \ | |
2883 | c2 = temp % (0xFF - 0xA1) + 0x21; \ | |
2884 | } while (0) | |
2885 | ||
2886 | #define ENCODE_BIG5(charset, c1, c2, b1, b2) \ | |
2887 | do { \ | |
2888 | unsigned int temp = (c1 - 0x21) * (0xFF - 0xA1) + (c2 - 0x21); \ | |
2889 | if (charset == charset_big5_2) \ | |
2890 | temp += BIG5_SAME_ROW * (0xC9 - 0xA1); \ | |
2891 | b1 = temp / BIG5_SAME_ROW + 0xA1; \ | |
2892 | b2 = temp % BIG5_SAME_ROW; \ | |
2893 | b2 += b2 < 0x3F ? 0x40 : 0x62; \ | |
2894 | } while (0) | |
2895 | ||
2896 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2897 | Check if a text is encoded in SJIS. If it is, return | |
2898 | CODING_CATEGORY_MASK_SJIS, else return 0. */ | |
2899 | ||
0a28aafb KH |
2900 | static int |
2901 | detect_coding_sjis (src, src_end, multibytep) | |
4ed46869 | 2902 | unsigned char *src, *src_end; |
0a28aafb | 2903 | int multibytep; |
4ed46869 | 2904 | { |
b73bfc1c KH |
2905 | int c; |
2906 | /* Dummy for ONE_MORE_BYTE. */ | |
2907 | struct coding_system dummy_coding; | |
2908 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 2909 | |
b73bfc1c | 2910 | while (1) |
4ed46869 | 2911 | { |
0a28aafb | 2912 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
682169fe KH |
2913 | if (c < 0x80) |
2914 | continue; | |
2915 | if (c == 0x80 || c == 0xA0 || c > 0xEF) | |
2916 | return 0; | |
2917 | if (c <= 0x9F || c >= 0xE0) | |
4ed46869 | 2918 | { |
682169fe KH |
2919 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
2920 | if (c < 0x40 || c == 0x7F || c > 0xFC) | |
4ed46869 KH |
2921 | return 0; |
2922 | } | |
2923 | } | |
b73bfc1c | 2924 | label_end_of_loop: |
4ed46869 KH |
2925 | return CODING_CATEGORY_MASK_SJIS; |
2926 | } | |
2927 | ||
2928 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
2929 | Check if a text is encoded in BIG5. If it is, return | |
2930 | CODING_CATEGORY_MASK_BIG5, else return 0. */ | |
2931 | ||
0a28aafb KH |
2932 | static int |
2933 | detect_coding_big5 (src, src_end, multibytep) | |
4ed46869 | 2934 | unsigned char *src, *src_end; |
0a28aafb | 2935 | int multibytep; |
4ed46869 | 2936 | { |
b73bfc1c KH |
2937 | int c; |
2938 | /* Dummy for ONE_MORE_BYTE. */ | |
2939 | struct coding_system dummy_coding; | |
2940 | struct coding_system *coding = &dummy_coding; | |
4ed46869 | 2941 | |
b73bfc1c | 2942 | while (1) |
4ed46869 | 2943 | { |
0a28aafb | 2944 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
682169fe KH |
2945 | if (c < 0x80) |
2946 | continue; | |
2947 | if (c < 0xA1 || c > 0xFE) | |
2948 | return 0; | |
2949 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); | |
2950 | if (c < 0x40 || (c > 0x7F && c < 0xA1) || c > 0xFE) | |
2951 | return 0; | |
4ed46869 | 2952 | } |
b73bfc1c | 2953 | label_end_of_loop: |
4ed46869 KH |
2954 | return CODING_CATEGORY_MASK_BIG5; |
2955 | } | |
2956 | ||
fa42c37f KH |
2957 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
2958 | Check if a text is encoded in UTF-8. If it is, return | |
2959 | CODING_CATEGORY_MASK_UTF_8, else return 0. */ | |
2960 | ||
2961 | #define UTF_8_1_OCTET_P(c) ((c) < 0x80) | |
2962 | #define UTF_8_EXTRA_OCTET_P(c) (((c) & 0xC0) == 0x80) | |
2963 | #define UTF_8_2_OCTET_LEADING_P(c) (((c) & 0xE0) == 0xC0) | |
2964 | #define UTF_8_3_OCTET_LEADING_P(c) (((c) & 0xF0) == 0xE0) | |
2965 | #define UTF_8_4_OCTET_LEADING_P(c) (((c) & 0xF8) == 0xF0) | |
2966 | #define UTF_8_5_OCTET_LEADING_P(c) (((c) & 0xFC) == 0xF8) | |
2967 | #define UTF_8_6_OCTET_LEADING_P(c) (((c) & 0xFE) == 0xFC) | |
2968 | ||
0a28aafb KH |
2969 | static int |
2970 | detect_coding_utf_8 (src, src_end, multibytep) | |
fa42c37f | 2971 | unsigned char *src, *src_end; |
0a28aafb | 2972 | int multibytep; |
fa42c37f KH |
2973 | { |
2974 | unsigned char c; | |
2975 | int seq_maybe_bytes; | |
b73bfc1c KH |
2976 | /* Dummy for ONE_MORE_BYTE. */ |
2977 | struct coding_system dummy_coding; | |
2978 | struct coding_system *coding = &dummy_coding; | |
fa42c37f | 2979 | |
b73bfc1c | 2980 | while (1) |
fa42c37f | 2981 | { |
0a28aafb | 2982 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
fa42c37f KH |
2983 | if (UTF_8_1_OCTET_P (c)) |
2984 | continue; | |
2985 | else if (UTF_8_2_OCTET_LEADING_P (c)) | |
2986 | seq_maybe_bytes = 1; | |
2987 | else if (UTF_8_3_OCTET_LEADING_P (c)) | |
2988 | seq_maybe_bytes = 2; | |
2989 | else if (UTF_8_4_OCTET_LEADING_P (c)) | |
2990 | seq_maybe_bytes = 3; | |
2991 | else if (UTF_8_5_OCTET_LEADING_P (c)) | |
2992 | seq_maybe_bytes = 4; | |
2993 | else if (UTF_8_6_OCTET_LEADING_P (c)) | |
2994 | seq_maybe_bytes = 5; | |
2995 | else | |
2996 | return 0; | |
2997 | ||
2998 | do | |
2999 | { | |
0a28aafb | 3000 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
fa42c37f KH |
3001 | if (!UTF_8_EXTRA_OCTET_P (c)) |
3002 | return 0; | |
3003 | seq_maybe_bytes--; | |
3004 | } | |
3005 | while (seq_maybe_bytes > 0); | |
3006 | } | |
3007 | ||
b73bfc1c | 3008 | label_end_of_loop: |
fa42c37f KH |
3009 | return CODING_CATEGORY_MASK_UTF_8; |
3010 | } | |
3011 | ||
3012 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3013 | Check if a text is encoded in UTF-16 Big Endian (endian == 1) or | |
3014 | Little Endian (otherwise). If it is, return | |
3015 | CODING_CATEGORY_MASK_UTF_16_BE or CODING_CATEGORY_MASK_UTF_16_LE, | |
3016 | else return 0. */ | |
3017 | ||
3018 | #define UTF_16_INVALID_P(val) \ | |
3019 | (((val) == 0xFFFE) \ | |
3020 | || ((val) == 0xFFFF)) | |
3021 | ||
3022 | #define UTF_16_HIGH_SURROGATE_P(val) \ | |
3023 | (((val) & 0xD800) == 0xD800) | |
3024 | ||
3025 | #define UTF_16_LOW_SURROGATE_P(val) \ | |
3026 | (((val) & 0xDC00) == 0xDC00) | |
3027 | ||
0a28aafb KH |
3028 | static int |
3029 | detect_coding_utf_16 (src, src_end, multibytep) | |
fa42c37f | 3030 | unsigned char *src, *src_end; |
0a28aafb | 3031 | int multibytep; |
fa42c37f | 3032 | { |
b73bfc1c | 3033 | unsigned char c1, c2; |
1c7457e2 | 3034 | /* Dummy for ONE_MORE_BYTE_CHECK_MULTIBYTE. */ |
b73bfc1c KH |
3035 | struct coding_system dummy_coding; |
3036 | struct coding_system *coding = &dummy_coding; | |
fa42c37f | 3037 | |
0a28aafb KH |
3038 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c1, multibytep); |
3039 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c2, multibytep); | |
b73bfc1c KH |
3040 | |
3041 | if ((c1 == 0xFF) && (c2 == 0xFE)) | |
fa42c37f | 3042 | return CODING_CATEGORY_MASK_UTF_16_LE; |
b73bfc1c | 3043 | else if ((c1 == 0xFE) && (c2 == 0xFF)) |
fa42c37f KH |
3044 | return CODING_CATEGORY_MASK_UTF_16_BE; |
3045 | ||
b73bfc1c | 3046 | label_end_of_loop: |
fa42c37f KH |
3047 | return 0; |
3048 | } | |
3049 | ||
4ed46869 KH |
3050 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". |
3051 | If SJIS_P is 1, decode SJIS text, else decode BIG5 test. */ | |
3052 | ||
b73bfc1c | 3053 | static void |
4ed46869 | 3054 | decode_coding_sjis_big5 (coding, source, destination, |
d46c5b12 | 3055 | src_bytes, dst_bytes, sjis_p) |
4ed46869 | 3056 | struct coding_system *coding; |
5bdca8af DN |
3057 | const unsigned char *source; |
3058 | unsigned char *destination; | |
4ed46869 | 3059 | int src_bytes, dst_bytes; |
4ed46869 KH |
3060 | int sjis_p; |
3061 | { | |
5bdca8af DN |
3062 | const unsigned char *src = source; |
3063 | const unsigned char *src_end = source + src_bytes; | |
4ed46869 KH |
3064 | unsigned char *dst = destination; |
3065 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c KH |
3066 | /* SRC_BASE remembers the start position in source in each loop. |
3067 | The loop will be exited when there's not enough source code | |
3068 | (within macro ONE_MORE_BYTE), or when there's not enough | |
3069 | destination area to produce a character (within macro | |
3070 | EMIT_CHAR). */ | |
5bdca8af | 3071 | const unsigned char *src_base; |
b73bfc1c | 3072 | Lisp_Object translation_table; |
a5d301df | 3073 | |
b73bfc1c KH |
3074 | if (NILP (Venable_character_translation)) |
3075 | translation_table = Qnil; | |
3076 | else | |
3077 | { | |
3078 | translation_table = coding->translation_table_for_decode; | |
3079 | if (NILP (translation_table)) | |
3080 | translation_table = Vstandard_translation_table_for_decode; | |
3081 | } | |
4ed46869 | 3082 | |
d46c5b12 | 3083 | coding->produced_char = 0; |
b73bfc1c | 3084 | while (1) |
4ed46869 | 3085 | { |
85478bc6 | 3086 | int c, charset, c1, c2 = 0; |
b73bfc1c KH |
3087 | |
3088 | src_base = src; | |
3089 | ONE_MORE_BYTE (c1); | |
3090 | ||
3091 | if (c1 < 0x80) | |
4ed46869 | 3092 | { |
b73bfc1c KH |
3093 | charset = CHARSET_ASCII; |
3094 | if (c1 < 0x20) | |
4ed46869 | 3095 | { |
b73bfc1c | 3096 | if (c1 == '\r') |
d46c5b12 | 3097 | { |
b73bfc1c | 3098 | if (coding->eol_type == CODING_EOL_CRLF) |
d46c5b12 | 3099 | { |
b73bfc1c KH |
3100 | ONE_MORE_BYTE (c2); |
3101 | if (c2 == '\n') | |
3102 | c1 = c2; | |
b73bfc1c KH |
3103 | else |
3104 | /* To process C2 again, SRC is subtracted by 1. */ | |
3105 | src--; | |
d46c5b12 | 3106 | } |
b73bfc1c KH |
3107 | else if (coding->eol_type == CODING_EOL_CR) |
3108 | c1 = '\n'; | |
3109 | } | |
3110 | else if (c1 == '\n' | |
3111 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
3112 | && (coding->eol_type == CODING_EOL_CR | |
3113 | || coding->eol_type == CODING_EOL_CRLF)) | |
3114 | { | |
3115 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
3116 | goto label_end_of_loop; | |
d46c5b12 | 3117 | } |
4ed46869 | 3118 | } |
4ed46869 | 3119 | } |
54f78171 | 3120 | else |
b73bfc1c | 3121 | { |
4ed46869 KH |
3122 | if (sjis_p) |
3123 | { | |
682169fe | 3124 | if (c1 == 0x80 || c1 == 0xA0 || c1 > 0xEF) |
b73bfc1c | 3125 | goto label_invalid_code; |
682169fe | 3126 | if (c1 <= 0x9F || c1 >= 0xE0) |
fb88bf2d | 3127 | { |
54f78171 KH |
3128 | /* SJIS -> JISX0208 */ |
3129 | ONE_MORE_BYTE (c2); | |
b73bfc1c KH |
3130 | if (c2 < 0x40 || c2 == 0x7F || c2 > 0xFC) |
3131 | goto label_invalid_code; | |
3132 | DECODE_SJIS (c1, c2, c1, c2); | |
3133 | charset = charset_jisx0208; | |
5e34de15 | 3134 | } |
fb88bf2d | 3135 | else |
b73bfc1c KH |
3136 | /* SJIS -> JISX0201-Kana */ |
3137 | charset = charset_katakana_jisx0201; | |
4ed46869 | 3138 | } |
fb88bf2d | 3139 | else |
fb88bf2d | 3140 | { |
54f78171 | 3141 | /* BIG5 -> Big5 */ |
682169fe | 3142 | if (c1 < 0xA0 || c1 > 0xFE) |
b73bfc1c KH |
3143 | goto label_invalid_code; |
3144 | ONE_MORE_BYTE (c2); | |
3145 | if (c2 < 0x40 || (c2 > 0x7E && c2 < 0xA1) || c2 > 0xFE) | |
3146 | goto label_invalid_code; | |
3147 | DECODE_BIG5 (c1, c2, charset, c1, c2); | |
4ed46869 KH |
3148 | } |
3149 | } | |
4ed46869 | 3150 | |
b73bfc1c KH |
3151 | c = DECODE_ISO_CHARACTER (charset, c1, c2); |
3152 | EMIT_CHAR (c); | |
fb88bf2d KH |
3153 | continue; |
3154 | ||
b73bfc1c KH |
3155 | label_invalid_code: |
3156 | coding->errors++; | |
4ed46869 | 3157 | src = src_base; |
b73bfc1c KH |
3158 | c = *src++; |
3159 | EMIT_CHAR (c); | |
fb88bf2d | 3160 | } |
d46c5b12 | 3161 | |
b73bfc1c KH |
3162 | label_end_of_loop: |
3163 | coding->consumed = coding->consumed_char = src_base - source; | |
d46c5b12 | 3164 | coding->produced = dst - destination; |
b73bfc1c | 3165 | return; |
4ed46869 KH |
3166 | } |
3167 | ||
3168 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". | |
b73bfc1c KH |
3169 | This function can encode charsets `ascii', `katakana-jisx0201', |
3170 | `japanese-jisx0208', `chinese-big5-1', and `chinese-big5-2'. We | |
3171 | are sure that all these charsets are registered as official charset | |
4ed46869 KH |
3172 | (i.e. do not have extended leading-codes). Characters of other |
3173 | charsets are produced without any encoding. If SJIS_P is 1, encode | |
3174 | SJIS text, else encode BIG5 text. */ | |
3175 | ||
b73bfc1c | 3176 | static void |
4ed46869 | 3177 | encode_coding_sjis_big5 (coding, source, destination, |
d46c5b12 | 3178 | src_bytes, dst_bytes, sjis_p) |
4ed46869 KH |
3179 | struct coding_system *coding; |
3180 | unsigned char *source, *destination; | |
3181 | int src_bytes, dst_bytes; | |
4ed46869 KH |
3182 | int sjis_p; |
3183 | { | |
3184 | unsigned char *src = source; | |
3185 | unsigned char *src_end = source + src_bytes; | |
3186 | unsigned char *dst = destination; | |
3187 | unsigned char *dst_end = destination + dst_bytes; | |
b73bfc1c KH |
3188 | /* SRC_BASE remembers the start position in source in each loop. |
3189 | The loop will be exited when there's not enough source text to | |
3190 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
3191 | there's not enough destination area to produce encoded codes | |
3192 | (within macro EMIT_BYTES). */ | |
3193 | unsigned char *src_base; | |
3194 | Lisp_Object translation_table; | |
4ed46869 | 3195 | |
b73bfc1c KH |
3196 | if (NILP (Venable_character_translation)) |
3197 | translation_table = Qnil; | |
3198 | else | |
4ed46869 | 3199 | { |
39658efc | 3200 | translation_table = coding->translation_table_for_encode; |
b73bfc1c | 3201 | if (NILP (translation_table)) |
39658efc | 3202 | translation_table = Vstandard_translation_table_for_encode; |
b73bfc1c | 3203 | } |
a5d301df | 3204 | |
b73bfc1c KH |
3205 | while (1) |
3206 | { | |
3207 | int c, charset, c1, c2; | |
4ed46869 | 3208 | |
b73bfc1c KH |
3209 | src_base = src; |
3210 | ONE_MORE_CHAR (c); | |
93dec019 | 3211 | |
b73bfc1c KH |
3212 | /* Now encode the character C. */ |
3213 | if (SINGLE_BYTE_CHAR_P (c)) | |
3214 | { | |
3215 | switch (c) | |
4ed46869 | 3216 | { |
b73bfc1c | 3217 | case '\r': |
7371fe0a | 3218 | if (!(coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) |
b73bfc1c KH |
3219 | { |
3220 | EMIT_ONE_BYTE (c); | |
3221 | break; | |
3222 | } | |
3223 | c = '\n'; | |
3224 | case '\n': | |
3225 | if (coding->eol_type == CODING_EOL_CRLF) | |
3226 | { | |
3227 | EMIT_TWO_BYTES ('\r', c); | |
3228 | break; | |
3229 | } | |
3230 | else if (coding->eol_type == CODING_EOL_CR) | |
3231 | c = '\r'; | |
3232 | default: | |
3233 | EMIT_ONE_BYTE (c); | |
3234 | } | |
3235 | } | |
3236 | else | |
3237 | { | |
3238 | SPLIT_CHAR (c, charset, c1, c2); | |
3239 | if (sjis_p) | |
3240 | { | |
3241 | if (charset == charset_jisx0208 | |
3242 | || charset == charset_jisx0208_1978) | |
3243 | { | |
3244 | ENCODE_SJIS (c1, c2, c1, c2); | |
3245 | EMIT_TWO_BYTES (c1, c2); | |
3246 | } | |
39658efc KH |
3247 | else if (charset == charset_katakana_jisx0201) |
3248 | EMIT_ONE_BYTE (c1 | 0x80); | |
fc53a214 KH |
3249 | else if (charset == charset_latin_jisx0201) |
3250 | EMIT_ONE_BYTE (c1); | |
0eecad43 KH |
3251 | else if (coding->mode & CODING_MODE_INHIBIT_UNENCODABLE_CHAR) |
3252 | { | |
3253 | EMIT_ONE_BYTE (CODING_REPLACEMENT_CHARACTER); | |
3254 | if (CHARSET_WIDTH (charset) > 1) | |
3255 | EMIT_ONE_BYTE (CODING_REPLACEMENT_CHARACTER); | |
3256 | } | |
b73bfc1c KH |
3257 | else |
3258 | /* There's no way other than producing the internal | |
3259 | codes as is. */ | |
3260 | EMIT_BYTES (src_base, src); | |
4ed46869 | 3261 | } |
4ed46869 | 3262 | else |
b73bfc1c KH |
3263 | { |
3264 | if (charset == charset_big5_1 || charset == charset_big5_2) | |
3265 | { | |
3266 | ENCODE_BIG5 (charset, c1, c2, c1, c2); | |
3267 | EMIT_TWO_BYTES (c1, c2); | |
3268 | } | |
0eecad43 KH |
3269 | else if (coding->mode & CODING_MODE_INHIBIT_UNENCODABLE_CHAR) |
3270 | { | |
3271 | EMIT_ONE_BYTE (CODING_REPLACEMENT_CHARACTER); | |
3272 | if (CHARSET_WIDTH (charset) > 1) | |
3273 | EMIT_ONE_BYTE (CODING_REPLACEMENT_CHARACTER); | |
3274 | } | |
b73bfc1c KH |
3275 | else |
3276 | /* There's no way other than producing the internal | |
3277 | codes as is. */ | |
3278 | EMIT_BYTES (src_base, src); | |
3279 | } | |
4ed46869 | 3280 | } |
b73bfc1c | 3281 | coding->consumed_char++; |
4ed46869 KH |
3282 | } |
3283 | ||
b73bfc1c KH |
3284 | label_end_of_loop: |
3285 | coding->consumed = src_base - source; | |
d46c5b12 | 3286 | coding->produced = coding->produced_char = dst - destination; |
4ed46869 KH |
3287 | } |
3288 | ||
3289 | \f | |
1397dc18 KH |
3290 | /*** 5. CCL handlers ***/ |
3291 | ||
3292 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3293 | Check if a text is encoded in a coding system of which | |
3294 | encoder/decoder are written in CCL program. If it is, return | |
3295 | CODING_CATEGORY_MASK_CCL, else return 0. */ | |
3296 | ||
0a28aafb KH |
3297 | static int |
3298 | detect_coding_ccl (src, src_end, multibytep) | |
1397dc18 | 3299 | unsigned char *src, *src_end; |
0a28aafb | 3300 | int multibytep; |
1397dc18 KH |
3301 | { |
3302 | unsigned char *valid; | |
b73bfc1c KH |
3303 | int c; |
3304 | /* Dummy for ONE_MORE_BYTE. */ | |
3305 | struct coding_system dummy_coding; | |
3306 | struct coding_system *coding = &dummy_coding; | |
1397dc18 KH |
3307 | |
3308 | /* No coding system is assigned to coding-category-ccl. */ | |
3309 | if (!coding_system_table[CODING_CATEGORY_IDX_CCL]) | |
3310 | return 0; | |
3311 | ||
3312 | valid = coding_system_table[CODING_CATEGORY_IDX_CCL]->spec.ccl.valid_codes; | |
b73bfc1c | 3313 | while (1) |
1397dc18 | 3314 | { |
0a28aafb | 3315 | ONE_MORE_BYTE_CHECK_MULTIBYTE (c, multibytep); |
b73bfc1c KH |
3316 | if (! valid[c]) |
3317 | return 0; | |
1397dc18 | 3318 | } |
b73bfc1c | 3319 | label_end_of_loop: |
1397dc18 KH |
3320 | return CODING_CATEGORY_MASK_CCL; |
3321 | } | |
3322 | ||
3323 | \f | |
3324 | /*** 6. End-of-line handlers ***/ | |
4ed46869 | 3325 | |
b73bfc1c | 3326 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
4ed46869 | 3327 | |
b73bfc1c | 3328 | static void |
d46c5b12 | 3329 | decode_eol (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 3330 | struct coding_system *coding; |
5bdca8af DN |
3331 | const unsigned char *source; |
3332 | unsigned char *destination; | |
4ed46869 | 3333 | int src_bytes, dst_bytes; |
4ed46869 | 3334 | { |
5bdca8af | 3335 | const unsigned char *src = source; |
4ed46869 | 3336 | unsigned char *dst = destination; |
5bdca8af | 3337 | const unsigned char *src_end = src + src_bytes; |
b73bfc1c KH |
3338 | unsigned char *dst_end = dst + dst_bytes; |
3339 | Lisp_Object translation_table; | |
3340 | /* SRC_BASE remembers the start position in source in each loop. | |
3341 | The loop will be exited when there's not enough source code | |
3342 | (within macro ONE_MORE_BYTE), or when there's not enough | |
3343 | destination area to produce a character (within macro | |
3344 | EMIT_CHAR). */ | |
5bdca8af | 3345 | const unsigned char *src_base; |
b73bfc1c KH |
3346 | int c; |
3347 | ||
3348 | translation_table = Qnil; | |
4ed46869 KH |
3349 | switch (coding->eol_type) |
3350 | { | |
3351 | case CODING_EOL_CRLF: | |
b73bfc1c | 3352 | while (1) |
d46c5b12 | 3353 | { |
b73bfc1c KH |
3354 | src_base = src; |
3355 | ONE_MORE_BYTE (c); | |
3356 | if (c == '\r') | |
fb88bf2d | 3357 | { |
b73bfc1c KH |
3358 | ONE_MORE_BYTE (c); |
3359 | if (c != '\n') | |
3360 | { | |
b73bfc1c KH |
3361 | src--; |
3362 | c = '\r'; | |
3363 | } | |
fb88bf2d | 3364 | } |
b73bfc1c KH |
3365 | else if (c == '\n' |
3366 | && (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL)) | |
d46c5b12 | 3367 | { |
b73bfc1c KH |
3368 | coding->result = CODING_FINISH_INCONSISTENT_EOL; |
3369 | goto label_end_of_loop; | |
d46c5b12 | 3370 | } |
b73bfc1c | 3371 | EMIT_CHAR (c); |
d46c5b12 | 3372 | } |
b73bfc1c KH |
3373 | break; |
3374 | ||
3375 | case CODING_EOL_CR: | |
3376 | while (1) | |
d46c5b12 | 3377 | { |
b73bfc1c KH |
3378 | src_base = src; |
3379 | ONE_MORE_BYTE (c); | |
3380 | if (c == '\n') | |
3381 | { | |
3382 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
3383 | { | |
3384 | coding->result = CODING_FINISH_INCONSISTENT_EOL; | |
3385 | goto label_end_of_loop; | |
3386 | } | |
3387 | } | |
3388 | else if (c == '\r') | |
3389 | c = '\n'; | |
3390 | EMIT_CHAR (c); | |
d46c5b12 | 3391 | } |
4ed46869 KH |
3392 | break; |
3393 | ||
b73bfc1c KH |
3394 | default: /* no need for EOL handling */ |
3395 | while (1) | |
d46c5b12 | 3396 | { |
b73bfc1c KH |
3397 | src_base = src; |
3398 | ONE_MORE_BYTE (c); | |
3399 | EMIT_CHAR (c); | |
d46c5b12 | 3400 | } |
4ed46869 KH |
3401 | } |
3402 | ||
b73bfc1c KH |
3403 | label_end_of_loop: |
3404 | coding->consumed = coding->consumed_char = src_base - source; | |
3405 | coding->produced = dst - destination; | |
3406 | return; | |
4ed46869 KH |
3407 | } |
3408 | ||
3409 | /* See "GENERAL NOTES about `encode_coding_XXX ()' functions". Encode | |
b73bfc1c | 3410 | format of end-of-line according to `coding->eol_type'. It also |
8ca3766a | 3411 | convert multibyte form 8-bit characters to unibyte if |
b73bfc1c KH |
3412 | CODING->src_multibyte is nonzero. If `coding->mode & |
3413 | CODING_MODE_SELECTIVE_DISPLAY' is nonzero, code '\r' in source text | |
3414 | also means end-of-line. */ | |
4ed46869 | 3415 | |
b73bfc1c | 3416 | static void |
d46c5b12 | 3417 | encode_eol (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 3418 | struct coding_system *coding; |
a4244313 KR |
3419 | const unsigned char *source; |
3420 | unsigned char *destination; | |
4ed46869 | 3421 | int src_bytes, dst_bytes; |
4ed46869 | 3422 | { |
a4244313 | 3423 | const unsigned char *src = source; |
4ed46869 | 3424 | unsigned char *dst = destination; |
a4244313 | 3425 | const unsigned char *src_end = src + src_bytes; |
b73bfc1c KH |
3426 | unsigned char *dst_end = dst + dst_bytes; |
3427 | Lisp_Object translation_table; | |
3428 | /* SRC_BASE remembers the start position in source in each loop. | |
3429 | The loop will be exited when there's not enough source text to | |
3430 | analyze multi-byte codes (within macro ONE_MORE_CHAR), or when | |
3431 | there's not enough destination area to produce encoded codes | |
3432 | (within macro EMIT_BYTES). */ | |
a4244313 KR |
3433 | const unsigned char *src_base; |
3434 | unsigned char *tmp; | |
b73bfc1c KH |
3435 | int c; |
3436 | int selective_display = coding->mode & CODING_MODE_SELECTIVE_DISPLAY; | |
3437 | ||
3438 | translation_table = Qnil; | |
3439 | if (coding->src_multibyte | |
3440 | && *(src_end - 1) == LEADING_CODE_8_BIT_CONTROL) | |
3441 | { | |
3442 | src_end--; | |
3443 | src_bytes--; | |
3444 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; | |
3445 | } | |
fb88bf2d | 3446 | |
d46c5b12 KH |
3447 | if (coding->eol_type == CODING_EOL_CRLF) |
3448 | { | |
b73bfc1c | 3449 | while (src < src_end) |
d46c5b12 | 3450 | { |
b73bfc1c | 3451 | src_base = src; |
d46c5b12 | 3452 | c = *src++; |
b73bfc1c KH |
3453 | if (c >= 0x20) |
3454 | EMIT_ONE_BYTE (c); | |
3455 | else if (c == '\n' || (c == '\r' && selective_display)) | |
3456 | EMIT_TWO_BYTES ('\r', '\n'); | |
d46c5b12 | 3457 | else |
b73bfc1c | 3458 | EMIT_ONE_BYTE (c); |
d46c5b12 | 3459 | } |
ff2b1ea9 | 3460 | src_base = src; |
b73bfc1c | 3461 | label_end_of_loop: |
005f0d35 | 3462 | ; |
d46c5b12 KH |
3463 | } |
3464 | else | |
4ed46869 | 3465 | { |
78a629d2 | 3466 | if (!dst_bytes || src_bytes <= dst_bytes) |
4ed46869 | 3467 | { |
b73bfc1c KH |
3468 | safe_bcopy (src, dst, src_bytes); |
3469 | src_base = src_end; | |
3470 | dst += src_bytes; | |
d46c5b12 | 3471 | } |
d46c5b12 | 3472 | else |
b73bfc1c KH |
3473 | { |
3474 | if (coding->src_multibyte | |
3475 | && *(src + dst_bytes - 1) == LEADING_CODE_8_BIT_CONTROL) | |
3476 | dst_bytes--; | |
3477 | safe_bcopy (src, dst, dst_bytes); | |
3478 | src_base = src + dst_bytes; | |
3479 | dst = destination + dst_bytes; | |
3480 | coding->result = CODING_FINISH_INSUFFICIENT_DST; | |
3481 | } | |
993824c9 | 3482 | if (coding->eol_type == CODING_EOL_CR) |
d46c5b12 | 3483 | { |
a4244313 KR |
3484 | for (tmp = destination; tmp < dst; tmp++) |
3485 | if (*tmp == '\n') *tmp = '\r'; | |
d46c5b12 | 3486 | } |
b73bfc1c | 3487 | else if (selective_display) |
d46c5b12 | 3488 | { |
a4244313 KR |
3489 | for (tmp = destination; tmp < dst; tmp++) |
3490 | if (*tmp == '\r') *tmp = '\n'; | |
4ed46869 | 3491 | } |
4ed46869 | 3492 | } |
b73bfc1c KH |
3493 | if (coding->src_multibyte) |
3494 | dst = destination + str_as_unibyte (destination, dst - destination); | |
4ed46869 | 3495 | |
b73bfc1c KH |
3496 | coding->consumed = src_base - source; |
3497 | coding->produced = dst - destination; | |
78a629d2 | 3498 | coding->produced_char = coding->produced; |
4ed46869 KH |
3499 | } |
3500 | ||
3501 | \f | |
1397dc18 | 3502 | /*** 7. C library functions ***/ |
4ed46869 | 3503 | |
cfb43547 | 3504 | /* In Emacs Lisp, a coding system is represented by a Lisp symbol which |
4ed46869 | 3505 | has a property `coding-system'. The value of this property is a |
cfb43547 | 3506 | vector of length 5 (called the coding-vector). Among elements of |
4ed46869 KH |
3507 | this vector, the first (element[0]) and the fifth (element[4]) |
3508 | carry important information for decoding/encoding. Before | |
3509 | decoding/encoding, this information should be set in fields of a | |
3510 | structure of type `coding_system'. | |
3511 | ||
cfb43547 | 3512 | The value of the property `coding-system' can be a symbol of another |
4ed46869 KH |
3513 | subsidiary coding-system. In that case, Emacs gets coding-vector |
3514 | from that symbol. | |
3515 | ||
3516 | `element[0]' contains information to be set in `coding->type'. The | |
3517 | value and its meaning is as follows: | |
3518 | ||
0ef69138 KH |
3519 | 0 -- coding_type_emacs_mule |
3520 | 1 -- coding_type_sjis | |
3521 | 2 -- coding_type_iso2022 | |
3522 | 3 -- coding_type_big5 | |
3523 | 4 -- coding_type_ccl encoder/decoder written in CCL | |
3524 | nil -- coding_type_no_conversion | |
3525 | t -- coding_type_undecided (automatic conversion on decoding, | |
3526 | no-conversion on encoding) | |
4ed46869 KH |
3527 | |
3528 | `element[4]' contains information to be set in `coding->flags' and | |
3529 | `coding->spec'. The meaning varies by `coding->type'. | |
3530 | ||
3531 | If `coding->type' is `coding_type_iso2022', element[4] is a vector | |
3532 | of length 32 (of which the first 13 sub-elements are used now). | |
3533 | Meanings of these sub-elements are: | |
3534 | ||
3535 | sub-element[N] where N is 0 through 3: to be set in `coding->spec.iso2022' | |
3536 | If the value is an integer of valid charset, the charset is | |
3537 | assumed to be designated to graphic register N initially. | |
3538 | ||
3539 | If the value is minus, it is a minus value of charset which | |
3540 | reserves graphic register N, which means that the charset is | |
3541 | not designated initially but should be designated to graphic | |
3542 | register N just before encoding a character in that charset. | |
3543 | ||
3544 | If the value is nil, graphic register N is never used on | |
3545 | encoding. | |
93dec019 | 3546 | |
4ed46869 KH |
3547 | sub-element[N] where N is 4 through 11: to be set in `coding->flags' |
3548 | Each value takes t or nil. See the section ISO2022 of | |
3549 | `coding.h' for more information. | |
3550 | ||
3551 | If `coding->type' is `coding_type_big5', element[4] is t to denote | |
3552 | BIG5-ETen or nil to denote BIG5-HKU. | |
3553 | ||
3554 | If `coding->type' takes the other value, element[4] is ignored. | |
3555 | ||
cfb43547 | 3556 | Emacs Lisp's coding systems also carry information about format of |
4ed46869 KH |
3557 | end-of-line in a value of property `eol-type'. If the value is |
3558 | integer, 0 means CODING_EOL_LF, 1 means CODING_EOL_CRLF, and 2 | |
3559 | means CODING_EOL_CR. If it is not integer, it should be a vector | |
3560 | of subsidiary coding systems of which property `eol-type' has one | |
cfb43547 | 3561 | of the above values. |
4ed46869 KH |
3562 | |
3563 | */ | |
3564 | ||
3565 | /* Extract information for decoding/encoding from CODING_SYSTEM_SYMBOL | |
3566 | and set it in CODING. If CODING_SYSTEM_SYMBOL is invalid, CODING | |
3567 | is setup so that no conversion is necessary and return -1, else | |
3568 | return 0. */ | |
3569 | ||
3570 | int | |
e0e989f6 KH |
3571 | setup_coding_system (coding_system, coding) |
3572 | Lisp_Object coding_system; | |
4ed46869 KH |
3573 | struct coding_system *coding; |
3574 | { | |
d46c5b12 | 3575 | Lisp_Object coding_spec, coding_type, eol_type, plist; |
4608c386 | 3576 | Lisp_Object val; |
4ed46869 | 3577 | |
c07c8e12 KH |
3578 | /* At first, zero clear all members. */ |
3579 | bzero (coding, sizeof (struct coding_system)); | |
3580 | ||
d46c5b12 | 3581 | /* Initialize some fields required for all kinds of coding systems. */ |
774324d6 | 3582 | coding->symbol = coding_system; |
d46c5b12 KH |
3583 | coding->heading_ascii = -1; |
3584 | coding->post_read_conversion = coding->pre_write_conversion = Qnil; | |
ec6d2bb8 KH |
3585 | coding->composing = COMPOSITION_DISABLED; |
3586 | coding->cmp_data = NULL; | |
1f5dbf34 KH |
3587 | |
3588 | if (NILP (coding_system)) | |
3589 | goto label_invalid_coding_system; | |
3590 | ||
4608c386 | 3591 | coding_spec = Fget (coding_system, Qcoding_system); |
1f5dbf34 | 3592 | |
4608c386 KH |
3593 | if (!VECTORP (coding_spec) |
3594 | || XVECTOR (coding_spec)->size != 5 | |
3595 | || !CONSP (XVECTOR (coding_spec)->contents[3])) | |
4ed46869 | 3596 | goto label_invalid_coding_system; |
4608c386 | 3597 | |
d46c5b12 KH |
3598 | eol_type = inhibit_eol_conversion ? Qnil : Fget (coding_system, Qeol_type); |
3599 | if (VECTORP (eol_type)) | |
3600 | { | |
3601 | coding->eol_type = CODING_EOL_UNDECIDED; | |
3602 | coding->common_flags = CODING_REQUIRE_DETECTION_MASK; | |
3603 | } | |
3604 | else if (XFASTINT (eol_type) == 1) | |
3605 | { | |
3606 | coding->eol_type = CODING_EOL_CRLF; | |
3607 | coding->common_flags | |
3608 | = CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
3609 | } | |
3610 | else if (XFASTINT (eol_type) == 2) | |
3611 | { | |
3612 | coding->eol_type = CODING_EOL_CR; | |
3613 | coding->common_flags | |
3614 | = CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
3615 | } | |
3616 | else | |
3617 | coding->eol_type = CODING_EOL_LF; | |
3618 | ||
3619 | coding_type = XVECTOR (coding_spec)->contents[0]; | |
3620 | /* Try short cut. */ | |
3621 | if (SYMBOLP (coding_type)) | |
3622 | { | |
3623 | if (EQ (coding_type, Qt)) | |
3624 | { | |
3625 | coding->type = coding_type_undecided; | |
3626 | coding->common_flags |= CODING_REQUIRE_DETECTION_MASK; | |
3627 | } | |
3628 | else | |
3629 | coding->type = coding_type_no_conversion; | |
9b96232f KH |
3630 | /* Initialize this member. Any thing other than |
3631 | CODING_CATEGORY_IDX_UTF_16_BE and | |
3632 | CODING_CATEGORY_IDX_UTF_16_LE are ok because they have | |
3633 | special treatment in detect_eol. */ | |
3634 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
3635 | ||
d46c5b12 KH |
3636 | return 0; |
3637 | } | |
3638 | ||
d46c5b12 KH |
3639 | /* Get values of coding system properties: |
3640 | `post-read-conversion', `pre-write-conversion', | |
f967223b | 3641 | `translation-table-for-decode', `translation-table-for-encode'. */ |
4608c386 | 3642 | plist = XVECTOR (coding_spec)->contents[3]; |
b843d1ae | 3643 | /* Pre & post conversion functions should be disabled if |
8ca3766a | 3644 | inhibit_eol_conversion is nonzero. This is the case that a code |
b843d1ae KH |
3645 | conversion function is called while those functions are running. */ |
3646 | if (! inhibit_pre_post_conversion) | |
3647 | { | |
3648 | coding->post_read_conversion = Fplist_get (plist, Qpost_read_conversion); | |
3649 | coding->pre_write_conversion = Fplist_get (plist, Qpre_write_conversion); | |
3650 | } | |
f967223b | 3651 | val = Fplist_get (plist, Qtranslation_table_for_decode); |
4608c386 | 3652 | if (SYMBOLP (val)) |
f967223b KH |
3653 | val = Fget (val, Qtranslation_table_for_decode); |
3654 | coding->translation_table_for_decode = CHAR_TABLE_P (val) ? val : Qnil; | |
3655 | val = Fplist_get (plist, Qtranslation_table_for_encode); | |
4608c386 | 3656 | if (SYMBOLP (val)) |
f967223b KH |
3657 | val = Fget (val, Qtranslation_table_for_encode); |
3658 | coding->translation_table_for_encode = CHAR_TABLE_P (val) ? val : Qnil; | |
d46c5b12 KH |
3659 | val = Fplist_get (plist, Qcoding_category); |
3660 | if (!NILP (val)) | |
3661 | { | |
3662 | val = Fget (val, Qcoding_category_index); | |
3663 | if (INTEGERP (val)) | |
3664 | coding->category_idx = XINT (val); | |
3665 | else | |
3666 | goto label_invalid_coding_system; | |
3667 | } | |
3668 | else | |
3669 | goto label_invalid_coding_system; | |
93dec019 | 3670 | |
ec6d2bb8 KH |
3671 | /* If the coding system has non-nil `composition' property, enable |
3672 | composition handling. */ | |
3673 | val = Fplist_get (plist, Qcomposition); | |
3674 | if (!NILP (val)) | |
3675 | coding->composing = COMPOSITION_NO; | |
3676 | ||
d46c5b12 | 3677 | switch (XFASTINT (coding_type)) |
4ed46869 KH |
3678 | { |
3679 | case 0: | |
0ef69138 | 3680 | coding->type = coding_type_emacs_mule; |
aa72b389 KH |
3681 | coding->common_flags |
3682 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
c952af22 KH |
3683 | if (!NILP (coding->post_read_conversion)) |
3684 | coding->common_flags |= CODING_REQUIRE_DECODING_MASK; | |
3685 | if (!NILP (coding->pre_write_conversion)) | |
3686 | coding->common_flags |= CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 KH |
3687 | break; |
3688 | ||
3689 | case 1: | |
3690 | coding->type = coding_type_sjis; | |
c952af22 KH |
3691 | coding->common_flags |
3692 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 KH |
3693 | break; |
3694 | ||
3695 | case 2: | |
3696 | coding->type = coding_type_iso2022; | |
c952af22 KH |
3697 | coding->common_flags |
3698 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3699 | { |
70c22245 | 3700 | Lisp_Object val, temp; |
4ed46869 | 3701 | Lisp_Object *flags; |
d46c5b12 | 3702 | int i, charset, reg_bits = 0; |
4ed46869 | 3703 | |
4608c386 | 3704 | val = XVECTOR (coding_spec)->contents[4]; |
f44d27ce | 3705 | |
4ed46869 KH |
3706 | if (!VECTORP (val) || XVECTOR (val)->size != 32) |
3707 | goto label_invalid_coding_system; | |
3708 | ||
3709 | flags = XVECTOR (val)->contents; | |
3710 | coding->flags | |
3711 | = ((NILP (flags[4]) ? 0 : CODING_FLAG_ISO_SHORT_FORM) | |
3712 | | (NILP (flags[5]) ? 0 : CODING_FLAG_ISO_RESET_AT_EOL) | |
3713 | | (NILP (flags[6]) ? 0 : CODING_FLAG_ISO_RESET_AT_CNTL) | |
3714 | | (NILP (flags[7]) ? 0 : CODING_FLAG_ISO_SEVEN_BITS) | |
3715 | | (NILP (flags[8]) ? 0 : CODING_FLAG_ISO_LOCKING_SHIFT) | |
3716 | | (NILP (flags[9]) ? 0 : CODING_FLAG_ISO_SINGLE_SHIFT) | |
3717 | | (NILP (flags[10]) ? 0 : CODING_FLAG_ISO_USE_ROMAN) | |
3718 | | (NILP (flags[11]) ? 0 : CODING_FLAG_ISO_USE_OLDJIS) | |
e0e989f6 KH |
3719 | | (NILP (flags[12]) ? 0 : CODING_FLAG_ISO_NO_DIRECTION) |
3720 | | (NILP (flags[13]) ? 0 : CODING_FLAG_ISO_INIT_AT_BOL) | |
c4825358 KH |
3721 | | (NILP (flags[14]) ? 0 : CODING_FLAG_ISO_DESIGNATE_AT_BOL) |
3722 | | (NILP (flags[15]) ? 0 : CODING_FLAG_ISO_SAFE) | |
3f003981 | 3723 | | (NILP (flags[16]) ? 0 : CODING_FLAG_ISO_LATIN_EXTRA) |
c4825358 | 3724 | ); |
4ed46869 KH |
3725 | |
3726 | /* Invoke graphic register 0 to plane 0. */ | |
3727 | CODING_SPEC_ISO_INVOCATION (coding, 0) = 0; | |
3728 | /* Invoke graphic register 1 to plane 1 if we can use full 8-bit. */ | |
3729 | CODING_SPEC_ISO_INVOCATION (coding, 1) | |
3730 | = (coding->flags & CODING_FLAG_ISO_SEVEN_BITS ? -1 : 1); | |
3731 | /* Not single shifting at first. */ | |
6e85d753 | 3732 | CODING_SPEC_ISO_SINGLE_SHIFTING (coding) = 0; |
e0e989f6 | 3733 | /* Beginning of buffer should also be regarded as bol. */ |
6e85d753 | 3734 | CODING_SPEC_ISO_BOL (coding) = 1; |
4ed46869 | 3735 | |
70c22245 KH |
3736 | for (charset = 0; charset <= MAX_CHARSET; charset++) |
3737 | CODING_SPEC_ISO_REVISION_NUMBER (coding, charset) = 255; | |
3738 | val = Vcharset_revision_alist; | |
3739 | while (CONSP (val)) | |
3740 | { | |
03699b14 | 3741 | charset = get_charset_id (Fcar_safe (XCAR (val))); |
70c22245 | 3742 | if (charset >= 0 |
03699b14 | 3743 | && (temp = Fcdr_safe (XCAR (val)), INTEGERP (temp)) |
70c22245 KH |
3744 | && (i = XINT (temp), (i >= 0 && (i + '@') < 128))) |
3745 | CODING_SPEC_ISO_REVISION_NUMBER (coding, charset) = i; | |
03699b14 | 3746 | val = XCDR (val); |
70c22245 KH |
3747 | } |
3748 | ||
4ed46869 KH |
3749 | /* Checks FLAGS[REG] (REG = 0, 1, 2 3) and decide designations. |
3750 | FLAGS[REG] can be one of below: | |
3751 | integer CHARSET: CHARSET occupies register I, | |
3752 | t: designate nothing to REG initially, but can be used | |
3753 | by any charsets, | |
3754 | list of integer, nil, or t: designate the first | |
3755 | element (if integer) to REG initially, the remaining | |
3756 | elements (if integer) is designated to REG on request, | |
d46c5b12 | 3757 | if an element is t, REG can be used by any charsets, |
4ed46869 | 3758 | nil: REG is never used. */ |
467e7675 | 3759 | for (charset = 0; charset <= MAX_CHARSET; charset++) |
1ba9e4ab KH |
3760 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3761 | = CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION; | |
4ed46869 KH |
3762 | for (i = 0; i < 4; i++) |
3763 | { | |
87323294 PJ |
3764 | if ((INTEGERP (flags[i]) |
3765 | && (charset = XINT (flags[i]), CHARSET_VALID_P (charset))) | |
e0e989f6 | 3766 | || (charset = get_charset_id (flags[i])) >= 0) |
4ed46869 KH |
3767 | { |
3768 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = charset; | |
3769 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) = i; | |
3770 | } | |
3771 | else if (EQ (flags[i], Qt)) | |
3772 | { | |
3773 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
d46c5b12 KH |
3774 | reg_bits |= 1 << i; |
3775 | coding->flags |= CODING_FLAG_ISO_DESIGNATION; | |
4ed46869 KH |
3776 | } |
3777 | else if (CONSP (flags[i])) | |
3778 | { | |
84d60297 RS |
3779 | Lisp_Object tail; |
3780 | tail = flags[i]; | |
4ed46869 | 3781 | |
d46c5b12 | 3782 | coding->flags |= CODING_FLAG_ISO_DESIGNATION; |
87323294 PJ |
3783 | if ((INTEGERP (XCAR (tail)) |
3784 | && (charset = XINT (XCAR (tail)), | |
3785 | CHARSET_VALID_P (charset))) | |
03699b14 | 3786 | || (charset = get_charset_id (XCAR (tail))) >= 0) |
4ed46869 KH |
3787 | { |
3788 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = charset; | |
3789 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) =i; | |
3790 | } | |
3791 | else | |
3792 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
03699b14 | 3793 | tail = XCDR (tail); |
4ed46869 KH |
3794 | while (CONSP (tail)) |
3795 | { | |
87323294 PJ |
3796 | if ((INTEGERP (XCAR (tail)) |
3797 | && (charset = XINT (XCAR (tail)), | |
3798 | CHARSET_VALID_P (charset))) | |
03699b14 | 3799 | || (charset = get_charset_id (XCAR (tail))) >= 0) |
70c22245 KH |
3800 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3801 | = i; | |
03699b14 | 3802 | else if (EQ (XCAR (tail), Qt)) |
d46c5b12 | 3803 | reg_bits |= 1 << i; |
03699b14 | 3804 | tail = XCDR (tail); |
4ed46869 KH |
3805 | } |
3806 | } | |
3807 | else | |
3808 | CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i) = -1; | |
93dec019 | 3809 | |
4ed46869 KH |
3810 | CODING_SPEC_ISO_DESIGNATION (coding, i) |
3811 | = CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, i); | |
3812 | } | |
3813 | ||
d46c5b12 | 3814 | if (reg_bits && ! (coding->flags & CODING_FLAG_ISO_LOCKING_SHIFT)) |
4ed46869 KH |
3815 | { |
3816 | /* REG 1 can be used only by locking shift in 7-bit env. */ | |
3817 | if (coding->flags & CODING_FLAG_ISO_SEVEN_BITS) | |
d46c5b12 | 3818 | reg_bits &= ~2; |
4ed46869 KH |
3819 | if (! (coding->flags & CODING_FLAG_ISO_SINGLE_SHIFT)) |
3820 | /* Without any shifting, only REG 0 and 1 can be used. */ | |
d46c5b12 | 3821 | reg_bits &= 3; |
4ed46869 KH |
3822 | } |
3823 | ||
d46c5b12 KH |
3824 | if (reg_bits) |
3825 | for (charset = 0; charset <= MAX_CHARSET; charset++) | |
6e85d753 | 3826 | { |
928a85c1 | 3827 | if (CHARSET_DEFINED_P (charset) |
96148065 KH |
3828 | && (CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) |
3829 | == CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION)) | |
d46c5b12 KH |
3830 | { |
3831 | /* There exist some default graphic registers to be | |
96148065 | 3832 | used by CHARSET. */ |
d46c5b12 KH |
3833 | |
3834 | /* We had better avoid designating a charset of | |
3835 | CHARS96 to REG 0 as far as possible. */ | |
3836 | if (CHARSET_CHARS (charset) == 96) | |
3837 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) | |
3838 | = (reg_bits & 2 | |
3839 | ? 1 : (reg_bits & 4 ? 2 : (reg_bits & 8 ? 3 : 0))); | |
3840 | else | |
3841 | CODING_SPEC_ISO_REQUESTED_DESIGNATION (coding, charset) | |
3842 | = (reg_bits & 1 | |
3843 | ? 0 : (reg_bits & 2 ? 1 : (reg_bits & 4 ? 2 : 3))); | |
3844 | } | |
6e85d753 | 3845 | } |
4ed46869 | 3846 | } |
c952af22 | 3847 | coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK; |
d46c5b12 | 3848 | coding->spec.iso2022.last_invalid_designation_register = -1; |
4ed46869 KH |
3849 | break; |
3850 | ||
3851 | case 3: | |
3852 | coding->type = coding_type_big5; | |
c952af22 KH |
3853 | coding->common_flags |
3854 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3855 | coding->flags |
4608c386 | 3856 | = (NILP (XVECTOR (coding_spec)->contents[4]) |
4ed46869 KH |
3857 | ? CODING_FLAG_BIG5_HKU |
3858 | : CODING_FLAG_BIG5_ETEN); | |
3859 | break; | |
3860 | ||
3861 | case 4: | |
3862 | coding->type = coding_type_ccl; | |
c952af22 KH |
3863 | coding->common_flags |
3864 | |= CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK; | |
4ed46869 | 3865 | { |
84d60297 | 3866 | val = XVECTOR (coding_spec)->contents[4]; |
ef4ced28 KH |
3867 | if (! CONSP (val) |
3868 | || setup_ccl_program (&(coding->spec.ccl.decoder), | |
03699b14 | 3869 | XCAR (val)) < 0 |
ef4ced28 | 3870 | || setup_ccl_program (&(coding->spec.ccl.encoder), |
03699b14 | 3871 | XCDR (val)) < 0) |
4ed46869 | 3872 | goto label_invalid_coding_system; |
1397dc18 KH |
3873 | |
3874 | bzero (coding->spec.ccl.valid_codes, 256); | |
3875 | val = Fplist_get (plist, Qvalid_codes); | |
3876 | if (CONSP (val)) | |
3877 | { | |
3878 | Lisp_Object this; | |
3879 | ||
03699b14 | 3880 | for (; CONSP (val); val = XCDR (val)) |
1397dc18 | 3881 | { |
03699b14 | 3882 | this = XCAR (val); |
1397dc18 KH |
3883 | if (INTEGERP (this) |
3884 | && XINT (this) >= 0 && XINT (this) < 256) | |
3885 | coding->spec.ccl.valid_codes[XINT (this)] = 1; | |
3886 | else if (CONSP (this) | |
03699b14 KR |
3887 | && INTEGERP (XCAR (this)) |
3888 | && INTEGERP (XCDR (this))) | |
1397dc18 | 3889 | { |
03699b14 KR |
3890 | int start = XINT (XCAR (this)); |
3891 | int end = XINT (XCDR (this)); | |
1397dc18 KH |
3892 | |
3893 | if (start >= 0 && start <= end && end < 256) | |
e133c8fa | 3894 | while (start <= end) |
1397dc18 KH |
3895 | coding->spec.ccl.valid_codes[start++] = 1; |
3896 | } | |
3897 | } | |
3898 | } | |
4ed46869 | 3899 | } |
c952af22 | 3900 | coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK; |
aaaf0b1e | 3901 | coding->spec.ccl.cr_carryover = 0; |
1c3478b0 | 3902 | coding->spec.ccl.eight_bit_carryover[0] = 0; |
4ed46869 KH |
3903 | break; |
3904 | ||
27901516 KH |
3905 | case 5: |
3906 | coding->type = coding_type_raw_text; | |
3907 | break; | |
3908 | ||
4ed46869 | 3909 | default: |
d46c5b12 | 3910 | goto label_invalid_coding_system; |
4ed46869 KH |
3911 | } |
3912 | return 0; | |
3913 | ||
3914 | label_invalid_coding_system: | |
3915 | coding->type = coding_type_no_conversion; | |
d46c5b12 | 3916 | coding->category_idx = CODING_CATEGORY_IDX_BINARY; |
c952af22 | 3917 | coding->common_flags = 0; |
dec137e5 | 3918 | coding->eol_type = CODING_EOL_LF; |
d46c5b12 | 3919 | coding->pre_write_conversion = coding->post_read_conversion = Qnil; |
4ed46869 KH |
3920 | return -1; |
3921 | } | |
3922 | ||
ec6d2bb8 KH |
3923 | /* Free memory blocks allocated for storing composition information. */ |
3924 | ||
3925 | void | |
3926 | coding_free_composition_data (coding) | |
3927 | struct coding_system *coding; | |
3928 | { | |
3929 | struct composition_data *cmp_data = coding->cmp_data, *next; | |
3930 | ||
3931 | if (!cmp_data) | |
3932 | return; | |
3933 | /* Memory blocks are chained. At first, rewind to the first, then, | |
3934 | free blocks one by one. */ | |
3935 | while (cmp_data->prev) | |
3936 | cmp_data = cmp_data->prev; | |
3937 | while (cmp_data) | |
3938 | { | |
3939 | next = cmp_data->next; | |
3940 | xfree (cmp_data); | |
3941 | cmp_data = next; | |
3942 | } | |
3943 | coding->cmp_data = NULL; | |
3944 | } | |
3945 | ||
3946 | /* Set `char_offset' member of all memory blocks pointed by | |
3947 | coding->cmp_data to POS. */ | |
3948 | ||
3949 | void | |
3950 | coding_adjust_composition_offset (coding, pos) | |
3951 | struct coding_system *coding; | |
3952 | int pos; | |
3953 | { | |
3954 | struct composition_data *cmp_data; | |
3955 | ||
3956 | for (cmp_data = coding->cmp_data; cmp_data; cmp_data = cmp_data->next) | |
3957 | cmp_data->char_offset = pos; | |
3958 | } | |
3959 | ||
54f78171 KH |
3960 | /* Setup raw-text or one of its subsidiaries in the structure |
3961 | coding_system CODING according to the already setup value eol_type | |
3962 | in CODING. CODING should be setup for some coding system in | |
3963 | advance. */ | |
3964 | ||
3965 | void | |
3966 | setup_raw_text_coding_system (coding) | |
3967 | struct coding_system *coding; | |
3968 | { | |
3969 | if (coding->type != coding_type_raw_text) | |
3970 | { | |
3971 | coding->symbol = Qraw_text; | |
3972 | coding->type = coding_type_raw_text; | |
3973 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
3974 | { | |
84d60297 RS |
3975 | Lisp_Object subsidiaries; |
3976 | subsidiaries = Fget (Qraw_text, Qeol_type); | |
54f78171 KH |
3977 | |
3978 | if (VECTORP (subsidiaries) | |
3979 | && XVECTOR (subsidiaries)->size == 3) | |
3980 | coding->symbol | |
3981 | = XVECTOR (subsidiaries)->contents[coding->eol_type]; | |
3982 | } | |
716e0b0a | 3983 | setup_coding_system (coding->symbol, coding); |
54f78171 KH |
3984 | } |
3985 | return; | |
3986 | } | |
3987 | ||
4ed46869 KH |
3988 | /* Emacs has a mechanism to automatically detect a coding system if it |
3989 | is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But, | |
3990 | it's impossible to distinguish some coding systems accurately | |
3991 | because they use the same range of codes. So, at first, coding | |
3992 | systems are categorized into 7, those are: | |
3993 | ||
0ef69138 | 3994 | o coding-category-emacs-mule |
4ed46869 KH |
3995 | |
3996 | The category for a coding system which has the same code range | |
3997 | as Emacs' internal format. Assigned the coding-system (Lisp | |
0ef69138 | 3998 | symbol) `emacs-mule' by default. |
4ed46869 KH |
3999 | |
4000 | o coding-category-sjis | |
4001 | ||
4002 | The category for a coding system which has the same code range | |
4003 | as SJIS. Assigned the coding-system (Lisp | |
7717c392 | 4004 | symbol) `japanese-shift-jis' by default. |
4ed46869 KH |
4005 | |
4006 | o coding-category-iso-7 | |
4007 | ||
4008 | The category for a coding system which has the same code range | |
7717c392 | 4009 | as ISO2022 of 7-bit environment. This doesn't use any locking |
d46c5b12 KH |
4010 | shift and single shift functions. This can encode/decode all |
4011 | charsets. Assigned the coding-system (Lisp symbol) | |
4012 | `iso-2022-7bit' by default. | |
4013 | ||
4014 | o coding-category-iso-7-tight | |
4015 | ||
4016 | Same as coding-category-iso-7 except that this can | |
4017 | encode/decode only the specified charsets. | |
4ed46869 KH |
4018 | |
4019 | o coding-category-iso-8-1 | |
4020 | ||
4021 | The category for a coding system which has the same code range | |
4022 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
4023 | for DIMENSION1 charset. This doesn't use any locking shift |
4024 | and single shift functions. Assigned the coding-system (Lisp | |
4025 | symbol) `iso-latin-1' by default. | |
4ed46869 KH |
4026 | |
4027 | o coding-category-iso-8-2 | |
4028 | ||
4029 | The category for a coding system which has the same code range | |
4030 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
4031 | for DIMENSION2 charset. This doesn't use any locking shift |
4032 | and single shift functions. Assigned the coding-system (Lisp | |
4033 | symbol) `japanese-iso-8bit' by default. | |
4ed46869 | 4034 | |
7717c392 | 4035 | o coding-category-iso-7-else |
4ed46869 KH |
4036 | |
4037 | The category for a coding system which has the same code range | |
8ca3766a | 4038 | as ISO2022 of 7-bit environment but uses locking shift or |
7717c392 KH |
4039 | single shift functions. Assigned the coding-system (Lisp |
4040 | symbol) `iso-2022-7bit-lock' by default. | |
4041 | ||
4042 | o coding-category-iso-8-else | |
4043 | ||
4044 | The category for a coding system which has the same code range | |
8ca3766a | 4045 | as ISO2022 of 8-bit environment but uses locking shift or |
7717c392 KH |
4046 | single shift functions. Assigned the coding-system (Lisp |
4047 | symbol) `iso-2022-8bit-ss2' by default. | |
4ed46869 KH |
4048 | |
4049 | o coding-category-big5 | |
4050 | ||
4051 | The category for a coding system which has the same code range | |
4052 | as BIG5. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 4053 | `cn-big5' by default. |
4ed46869 | 4054 | |
fa42c37f KH |
4055 | o coding-category-utf-8 |
4056 | ||
4057 | The category for a coding system which has the same code range | |
38b92c42 | 4058 | as UTF-8 (cf. RFC3629). Assigned the coding-system (Lisp |
fa42c37f KH |
4059 | symbol) `utf-8' by default. |
4060 | ||
4061 | o coding-category-utf-16-be | |
4062 | ||
4063 | The category for a coding system in which a text has an | |
4064 | Unicode signature (cf. Unicode Standard) in the order of BIG | |
4065 | endian at the head. Assigned the coding-system (Lisp symbol) | |
4066 | `utf-16-be' by default. | |
4067 | ||
4068 | o coding-category-utf-16-le | |
4069 | ||
4070 | The category for a coding system in which a text has an | |
4071 | Unicode signature (cf. Unicode Standard) in the order of | |
4072 | LITTLE endian at the head. Assigned the coding-system (Lisp | |
4073 | symbol) `utf-16-le' by default. | |
4074 | ||
1397dc18 KH |
4075 | o coding-category-ccl |
4076 | ||
4077 | The category for a coding system of which encoder/decoder is | |
4078 | written in CCL programs. The default value is nil, i.e., no | |
4079 | coding system is assigned. | |
4080 | ||
4ed46869 KH |
4081 | o coding-category-binary |
4082 | ||
4083 | The category for a coding system not categorized in any of the | |
4084 | above. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 4085 | `no-conversion' by default. |
4ed46869 KH |
4086 | |
4087 | Each of them is a Lisp symbol and the value is an actual | |
cfb43547 | 4088 | `coding-system' (this is also a Lisp symbol) assigned by a user. |
4ed46869 KH |
4089 | What Emacs does actually is to detect a category of coding system. |
4090 | Then, it uses a `coding-system' assigned to it. If Emacs can't | |
cfb43547 | 4091 | decide a single possible category, it selects a category of the |
4ed46869 KH |
4092 | highest priority. Priorities of categories are also specified by a |
4093 | user in a Lisp variable `coding-category-list'. | |
4094 | ||
4095 | */ | |
4096 | ||
66cfb530 KH |
4097 | static |
4098 | int ascii_skip_code[256]; | |
4099 | ||
d46c5b12 | 4100 | /* Detect how a text of length SRC_BYTES pointed by SOURCE is encoded. |
4ed46869 KH |
4101 | If it detects possible coding systems, return an integer in which |
4102 | appropriate flag bits are set. Flag bits are defined by macros | |
fa42c37f KH |
4103 | CODING_CATEGORY_MASK_XXX in `coding.h'. If PRIORITIES is non-NULL, |
4104 | it should point the table `coding_priorities'. In that case, only | |
4105 | the flag bit for a coding system of the highest priority is set in | |
0a28aafb KH |
4106 | the returned value. If MULTIBYTEP is nonzero, 8-bit codes of the |
4107 | range 0x80..0x9F are in multibyte form. | |
4ed46869 | 4108 | |
d46c5b12 KH |
4109 | How many ASCII characters are at the head is returned as *SKIP. */ |
4110 | ||
4111 | static int | |
0a28aafb | 4112 | detect_coding_mask (source, src_bytes, priorities, skip, multibytep) |
d46c5b12 KH |
4113 | unsigned char *source; |
4114 | int src_bytes, *priorities, *skip; | |
0a28aafb | 4115 | int multibytep; |
4ed46869 KH |
4116 | { |
4117 | register unsigned char c; | |
d46c5b12 | 4118 | unsigned char *src = source, *src_end = source + src_bytes; |
fa42c37f | 4119 | unsigned int mask, utf16_examined_p, iso2022_examined_p; |
da55a2b7 | 4120 | int i; |
4ed46869 KH |
4121 | |
4122 | /* At first, skip all ASCII characters and control characters except | |
4123 | for three ISO2022 specific control characters. */ | |
66cfb530 KH |
4124 | ascii_skip_code[ISO_CODE_SO] = 0; |
4125 | ascii_skip_code[ISO_CODE_SI] = 0; | |
4126 | ascii_skip_code[ISO_CODE_ESC] = 0; | |
4127 | ||
bcf26d6a | 4128 | label_loop_detect_coding: |
66cfb530 | 4129 | while (src < src_end && ascii_skip_code[*src]) src++; |
d46c5b12 | 4130 | *skip = src - source; |
4ed46869 KH |
4131 | |
4132 | if (src >= src_end) | |
4133 | /* We found nothing other than ASCII. There's nothing to do. */ | |
d46c5b12 | 4134 | return 0; |
4ed46869 | 4135 | |
8a8147d6 | 4136 | c = *src; |
4ed46869 KH |
4137 | /* The text seems to be encoded in some multilingual coding system. |
4138 | Now, try to find in which coding system the text is encoded. */ | |
4139 | if (c < 0x80) | |
bcf26d6a KH |
4140 | { |
4141 | /* i.e. (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO) */ | |
4142 | /* C is an ISO2022 specific control code of C0. */ | |
0a28aafb | 4143 | mask = detect_coding_iso2022 (src, src_end, multibytep); |
1b2af4b0 | 4144 | if (mask == 0) |
d46c5b12 KH |
4145 | { |
4146 | /* No valid ISO2022 code follows C. Try again. */ | |
4147 | src++; | |
66cfb530 KH |
4148 | if (c == ISO_CODE_ESC) |
4149 | ascii_skip_code[ISO_CODE_ESC] = 1; | |
4150 | else | |
4151 | ascii_skip_code[ISO_CODE_SO] = ascii_skip_code[ISO_CODE_SI] = 1; | |
d46c5b12 KH |
4152 | goto label_loop_detect_coding; |
4153 | } | |
4154 | if (priorities) | |
fa42c37f KH |
4155 | { |
4156 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
4157 | { | |
4158 | if (mask & priorities[i]) | |
4159 | return priorities[i]; | |
4160 | } | |
4161 | return CODING_CATEGORY_MASK_RAW_TEXT; | |
4162 | } | |
bcf26d6a | 4163 | } |
d46c5b12 | 4164 | else |
c4825358 | 4165 | { |
d46c5b12 | 4166 | int try; |
4ed46869 | 4167 | |
0a28aafb | 4168 | if (multibytep && c == LEADING_CODE_8_BIT_CONTROL) |
67091e59 | 4169 | c = src[1] - 0x20; |
0a28aafb | 4170 | |
d46c5b12 KH |
4171 | if (c < 0xA0) |
4172 | { | |
4173 | /* C is the first byte of SJIS character code, | |
fa42c37f KH |
4174 | or a leading-code of Emacs' internal format (emacs-mule), |
4175 | or the first byte of UTF-16. */ | |
4176 | try = (CODING_CATEGORY_MASK_SJIS | |
4177 | | CODING_CATEGORY_MASK_EMACS_MULE | |
4178 | | CODING_CATEGORY_MASK_UTF_16_BE | |
4179 | | CODING_CATEGORY_MASK_UTF_16_LE); | |
d46c5b12 KH |
4180 | |
4181 | /* Or, if C is a special latin extra code, | |
93dec019 | 4182 | or is an ISO2022 specific control code of C1 (SS2 or SS3), |
d46c5b12 KH |
4183 | or is an ISO2022 control-sequence-introducer (CSI), |
4184 | we should also consider the possibility of ISO2022 codings. */ | |
4185 | if ((VECTORP (Vlatin_extra_code_table) | |
4186 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
4187 | || (c == ISO_CODE_SS2 || c == ISO_CODE_SS3) | |
4188 | || (c == ISO_CODE_CSI | |
4189 | && (src < src_end | |
4190 | && (*src == ']' | |
4191 | || ((*src == '0' || *src == '1' || *src == '2') | |
4192 | && src + 1 < src_end | |
4193 | && src[1] == ']'))))) | |
4194 | try |= (CODING_CATEGORY_MASK_ISO_8_ELSE | |
4195 | | CODING_CATEGORY_MASK_ISO_8BIT); | |
4196 | } | |
c4825358 | 4197 | else |
d46c5b12 KH |
4198 | /* C is a character of ISO2022 in graphic plane right, |
4199 | or a SJIS's 1-byte character code (i.e. JISX0201), | |
fa42c37f KH |
4200 | or the first byte of BIG5's 2-byte code, |
4201 | or the first byte of UTF-8/16. */ | |
d46c5b12 KH |
4202 | try = (CODING_CATEGORY_MASK_ISO_8_ELSE |
4203 | | CODING_CATEGORY_MASK_ISO_8BIT | |
4204 | | CODING_CATEGORY_MASK_SJIS | |
fa42c37f KH |
4205 | | CODING_CATEGORY_MASK_BIG5 |
4206 | | CODING_CATEGORY_MASK_UTF_8 | |
4207 | | CODING_CATEGORY_MASK_UTF_16_BE | |
4208 | | CODING_CATEGORY_MASK_UTF_16_LE); | |
d46c5b12 | 4209 | |
1397dc18 KH |
4210 | /* Or, we may have to consider the possibility of CCL. */ |
4211 | if (coding_system_table[CODING_CATEGORY_IDX_CCL] | |
4212 | && (coding_system_table[CODING_CATEGORY_IDX_CCL] | |
4213 | ->spec.ccl.valid_codes)[c]) | |
4214 | try |= CODING_CATEGORY_MASK_CCL; | |
4215 | ||
d46c5b12 | 4216 | mask = 0; |
fa42c37f | 4217 | utf16_examined_p = iso2022_examined_p = 0; |
d46c5b12 KH |
4218 | if (priorities) |
4219 | { | |
4220 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
4221 | { | |
fa42c37f KH |
4222 | if (!iso2022_examined_p |
4223 | && (priorities[i] & try & CODING_CATEGORY_MASK_ISO)) | |
4224 | { | |
0192762c | 4225 | mask |= detect_coding_iso2022 (src, src_end, multibytep); |
fa42c37f KH |
4226 | iso2022_examined_p = 1; |
4227 | } | |
5ab13dd0 | 4228 | else if (priorities[i] & try & CODING_CATEGORY_MASK_SJIS) |
0a28aafb | 4229 | mask |= detect_coding_sjis (src, src_end, multibytep); |
fa42c37f | 4230 | else if (priorities[i] & try & CODING_CATEGORY_MASK_UTF_8) |
0a28aafb | 4231 | mask |= detect_coding_utf_8 (src, src_end, multibytep); |
fa42c37f KH |
4232 | else if (!utf16_examined_p |
4233 | && (priorities[i] & try & | |
4234 | CODING_CATEGORY_MASK_UTF_16_BE_LE)) | |
4235 | { | |
0a28aafb | 4236 | mask |= detect_coding_utf_16 (src, src_end, multibytep); |
fa42c37f KH |
4237 | utf16_examined_p = 1; |
4238 | } | |
5ab13dd0 | 4239 | else if (priorities[i] & try & CODING_CATEGORY_MASK_BIG5) |
0a28aafb | 4240 | mask |= detect_coding_big5 (src, src_end, multibytep); |
5ab13dd0 | 4241 | else if (priorities[i] & try & CODING_CATEGORY_MASK_EMACS_MULE) |
0a28aafb | 4242 | mask |= detect_coding_emacs_mule (src, src_end, multibytep); |
89fa8b36 | 4243 | else if (priorities[i] & try & CODING_CATEGORY_MASK_CCL) |
0a28aafb | 4244 | mask |= detect_coding_ccl (src, src_end, multibytep); |
5ab13dd0 | 4245 | else if (priorities[i] & CODING_CATEGORY_MASK_RAW_TEXT) |
fa42c37f | 4246 | mask |= CODING_CATEGORY_MASK_RAW_TEXT; |
5ab13dd0 | 4247 | else if (priorities[i] & CODING_CATEGORY_MASK_BINARY) |
fa42c37f KH |
4248 | mask |= CODING_CATEGORY_MASK_BINARY; |
4249 | if (mask & priorities[i]) | |
4250 | return priorities[i]; | |
d46c5b12 KH |
4251 | } |
4252 | return CODING_CATEGORY_MASK_RAW_TEXT; | |
4253 | } | |
4254 | if (try & CODING_CATEGORY_MASK_ISO) | |
0a28aafb | 4255 | mask |= detect_coding_iso2022 (src, src_end, multibytep); |
d46c5b12 | 4256 | if (try & CODING_CATEGORY_MASK_SJIS) |
0a28aafb | 4257 | mask |= detect_coding_sjis (src, src_end, multibytep); |
d46c5b12 | 4258 | if (try & CODING_CATEGORY_MASK_BIG5) |
0a28aafb | 4259 | mask |= detect_coding_big5 (src, src_end, multibytep); |
fa42c37f | 4260 | if (try & CODING_CATEGORY_MASK_UTF_8) |
0a28aafb | 4261 | mask |= detect_coding_utf_8 (src, src_end, multibytep); |
fa42c37f | 4262 | if (try & CODING_CATEGORY_MASK_UTF_16_BE_LE) |
0a28aafb | 4263 | mask |= detect_coding_utf_16 (src, src_end, multibytep); |
d46c5b12 | 4264 | if (try & CODING_CATEGORY_MASK_EMACS_MULE) |
0a28aafb | 4265 | mask |= detect_coding_emacs_mule (src, src_end, multibytep); |
1397dc18 | 4266 | if (try & CODING_CATEGORY_MASK_CCL) |
0a28aafb | 4267 | mask |= detect_coding_ccl (src, src_end, multibytep); |
c4825358 | 4268 | } |
5ab13dd0 | 4269 | return (mask | CODING_CATEGORY_MASK_RAW_TEXT | CODING_CATEGORY_MASK_BINARY); |
4ed46869 KH |
4270 | } |
4271 | ||
4272 | /* Detect how a text of length SRC_BYTES pointed by SRC is encoded. | |
4273 | The information of the detected coding system is set in CODING. */ | |
4274 | ||
4275 | void | |
4276 | detect_coding (coding, src, src_bytes) | |
4277 | struct coding_system *coding; | |
a4244313 | 4278 | const unsigned char *src; |
4ed46869 KH |
4279 | int src_bytes; |
4280 | { | |
d46c5b12 | 4281 | unsigned int idx; |
da55a2b7 | 4282 | int skip, mask; |
84d60297 | 4283 | Lisp_Object val; |
4ed46869 | 4284 | |
84d60297 | 4285 | val = Vcoding_category_list; |
64c1e55f KH |
4286 | mask = detect_coding_mask (src, src_bytes, coding_priorities, &skip, |
4287 | coding->src_multibyte); | |
d46c5b12 | 4288 | coding->heading_ascii = skip; |
4ed46869 | 4289 | |
d46c5b12 KH |
4290 | if (!mask) return; |
4291 | ||
4292 | /* We found a single coding system of the highest priority in MASK. */ | |
4293 | idx = 0; | |
4294 | while (mask && ! (mask & 1)) mask >>= 1, idx++; | |
4295 | if (! mask) | |
4296 | idx = CODING_CATEGORY_IDX_RAW_TEXT; | |
4ed46869 | 4297 | |
f5c1dd0d | 4298 | val = SYMBOL_VALUE (XVECTOR (Vcoding_category_table)->contents[idx]); |
d46c5b12 KH |
4299 | |
4300 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
27901516 | 4301 | { |
84d60297 | 4302 | Lisp_Object tmp; |
d46c5b12 | 4303 | |
84d60297 | 4304 | tmp = Fget (val, Qeol_type); |
d46c5b12 KH |
4305 | if (VECTORP (tmp)) |
4306 | val = XVECTOR (tmp)->contents[coding->eol_type]; | |
4ed46869 | 4307 | } |
b73bfc1c KH |
4308 | |
4309 | /* Setup this new coding system while preserving some slots. */ | |
4310 | { | |
4311 | int src_multibyte = coding->src_multibyte; | |
4312 | int dst_multibyte = coding->dst_multibyte; | |
4313 | ||
4314 | setup_coding_system (val, coding); | |
4315 | coding->src_multibyte = src_multibyte; | |
4316 | coding->dst_multibyte = dst_multibyte; | |
4317 | coding->heading_ascii = skip; | |
4318 | } | |
4ed46869 KH |
4319 | } |
4320 | ||
d46c5b12 KH |
4321 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by |
4322 | SOURCE is encoded. Return one of CODING_EOL_LF, CODING_EOL_CRLF, | |
4323 | CODING_EOL_CR, and CODING_EOL_UNDECIDED. | |
4324 | ||
4325 | How many non-eol characters are at the head is returned as *SKIP. */ | |
4ed46869 | 4326 | |
bc4bc72a RS |
4327 | #define MAX_EOL_CHECK_COUNT 3 |
4328 | ||
d46c5b12 KH |
4329 | static int |
4330 | detect_eol_type (source, src_bytes, skip) | |
4331 | unsigned char *source; | |
4332 | int src_bytes, *skip; | |
4ed46869 | 4333 | { |
d46c5b12 | 4334 | unsigned char *src = source, *src_end = src + src_bytes; |
4ed46869 | 4335 | unsigned char c; |
bc4bc72a RS |
4336 | int total = 0; /* How many end-of-lines are found so far. */ |
4337 | int eol_type = CODING_EOL_UNDECIDED; | |
4338 | int this_eol_type; | |
4ed46869 | 4339 | |
d46c5b12 KH |
4340 | *skip = 0; |
4341 | ||
bc4bc72a | 4342 | while (src < src_end && total < MAX_EOL_CHECK_COUNT) |
4ed46869 KH |
4343 | { |
4344 | c = *src++; | |
bc4bc72a | 4345 | if (c == '\n' || c == '\r') |
4ed46869 | 4346 | { |
d46c5b12 KH |
4347 | if (*skip == 0) |
4348 | *skip = src - 1 - source; | |
bc4bc72a RS |
4349 | total++; |
4350 | if (c == '\n') | |
4351 | this_eol_type = CODING_EOL_LF; | |
4352 | else if (src >= src_end || *src != '\n') | |
4353 | this_eol_type = CODING_EOL_CR; | |
4ed46869 | 4354 | else |
bc4bc72a RS |
4355 | this_eol_type = CODING_EOL_CRLF, src++; |
4356 | ||
4357 | if (eol_type == CODING_EOL_UNDECIDED) | |
4358 | /* This is the first end-of-line. */ | |
4359 | eol_type = this_eol_type; | |
4360 | else if (eol_type != this_eol_type) | |
d46c5b12 KH |
4361 | { |
4362 | /* The found type is different from what found before. */ | |
4363 | eol_type = CODING_EOL_INCONSISTENT; | |
4364 | break; | |
4365 | } | |
4ed46869 KH |
4366 | } |
4367 | } | |
bc4bc72a | 4368 | |
d46c5b12 KH |
4369 | if (*skip == 0) |
4370 | *skip = src_end - source; | |
85a02ca4 | 4371 | return eol_type; |
4ed46869 KH |
4372 | } |
4373 | ||
fa42c37f KH |
4374 | /* Like detect_eol_type, but detect EOL type in 2-octet |
4375 | big-endian/little-endian format for coding systems utf-16-be and | |
4376 | utf-16-le. */ | |
4377 | ||
4378 | static int | |
4379 | detect_eol_type_in_2_octet_form (source, src_bytes, skip, big_endian_p) | |
4380 | unsigned char *source; | |
cfb43547 | 4381 | int src_bytes, *skip, big_endian_p; |
fa42c37f KH |
4382 | { |
4383 | unsigned char *src = source, *src_end = src + src_bytes; | |
4384 | unsigned int c1, c2; | |
4385 | int total = 0; /* How many end-of-lines are found so far. */ | |
4386 | int eol_type = CODING_EOL_UNDECIDED; | |
4387 | int this_eol_type; | |
4388 | int msb, lsb; | |
4389 | ||
4390 | if (big_endian_p) | |
4391 | msb = 0, lsb = 1; | |
4392 | else | |
4393 | msb = 1, lsb = 0; | |
4394 | ||
4395 | *skip = 0; | |
4396 | ||
4397 | while ((src + 1) < src_end && total < MAX_EOL_CHECK_COUNT) | |
4398 | { | |
4399 | c1 = (src[msb] << 8) | (src[lsb]); | |
4400 | src += 2; | |
4401 | ||
4402 | if (c1 == '\n' || c1 == '\r') | |
4403 | { | |
4404 | if (*skip == 0) | |
4405 | *skip = src - 2 - source; | |
4406 | total++; | |
4407 | if (c1 == '\n') | |
4408 | { | |
4409 | this_eol_type = CODING_EOL_LF; | |
4410 | } | |
4411 | else | |
4412 | { | |
4413 | if ((src + 1) >= src_end) | |
4414 | { | |
4415 | this_eol_type = CODING_EOL_CR; | |
4416 | } | |
4417 | else | |
4418 | { | |
4419 | c2 = (src[msb] << 8) | (src[lsb]); | |
4420 | if (c2 == '\n') | |
4421 | this_eol_type = CODING_EOL_CRLF, src += 2; | |
4422 | else | |
4423 | this_eol_type = CODING_EOL_CR; | |
4424 | } | |
4425 | } | |
4426 | ||
4427 | if (eol_type == CODING_EOL_UNDECIDED) | |
4428 | /* This is the first end-of-line. */ | |
4429 | eol_type = this_eol_type; | |
4430 | else if (eol_type != this_eol_type) | |
4431 | { | |
4432 | /* The found type is different from what found before. */ | |
4433 | eol_type = CODING_EOL_INCONSISTENT; | |
4434 | break; | |
4435 | } | |
4436 | } | |
4437 | } | |
4438 | ||
4439 | if (*skip == 0) | |
4440 | *skip = src_end - source; | |
4441 | return eol_type; | |
4442 | } | |
4443 | ||
4ed46869 KH |
4444 | /* Detect how end-of-line of a text of length SRC_BYTES pointed by SRC |
4445 | is encoded. If it detects an appropriate format of end-of-line, it | |
4446 | sets the information in *CODING. */ | |
4447 | ||
4448 | void | |
4449 | detect_eol (coding, src, src_bytes) | |
4450 | struct coding_system *coding; | |
a4244313 | 4451 | const unsigned char *src; |
4ed46869 KH |
4452 | int src_bytes; |
4453 | { | |
4608c386 | 4454 | Lisp_Object val; |
d46c5b12 | 4455 | int skip; |
fa42c37f KH |
4456 | int eol_type; |
4457 | ||
4458 | switch (coding->category_idx) | |
4459 | { | |
4460 | case CODING_CATEGORY_IDX_UTF_16_BE: | |
4461 | eol_type = detect_eol_type_in_2_octet_form (src, src_bytes, &skip, 1); | |
4462 | break; | |
4463 | case CODING_CATEGORY_IDX_UTF_16_LE: | |
4464 | eol_type = detect_eol_type_in_2_octet_form (src, src_bytes, &skip, 0); | |
4465 | break; | |
4466 | default: | |
4467 | eol_type = detect_eol_type (src, src_bytes, &skip); | |
4468 | break; | |
4469 | } | |
d46c5b12 KH |
4470 | |
4471 | if (coding->heading_ascii > skip) | |
4472 | coding->heading_ascii = skip; | |
4473 | else | |
4474 | skip = coding->heading_ascii; | |
4ed46869 | 4475 | |
0ef69138 | 4476 | if (eol_type == CODING_EOL_UNDECIDED) |
4ed46869 | 4477 | return; |
27901516 KH |
4478 | if (eol_type == CODING_EOL_INCONSISTENT) |
4479 | { | |
4480 | #if 0 | |
4481 | /* This code is suppressed until we find a better way to | |
992f23f2 | 4482 | distinguish raw text file and binary file. */ |
27901516 KH |
4483 | |
4484 | /* If we have already detected that the coding is raw-text, the | |
4485 | coding should actually be no-conversion. */ | |
4486 | if (coding->type == coding_type_raw_text) | |
4487 | { | |
4488 | setup_coding_system (Qno_conversion, coding); | |
4489 | return; | |
4490 | } | |
4491 | /* Else, let's decode only text code anyway. */ | |
4492 | #endif /* 0 */ | |
1b2af4b0 | 4493 | eol_type = CODING_EOL_LF; |
27901516 KH |
4494 | } |
4495 | ||
4608c386 | 4496 | val = Fget (coding->symbol, Qeol_type); |
4ed46869 | 4497 | if (VECTORP (val) && XVECTOR (val)->size == 3) |
d46c5b12 | 4498 | { |
b73bfc1c KH |
4499 | int src_multibyte = coding->src_multibyte; |
4500 | int dst_multibyte = coding->dst_multibyte; | |
1cd6b64c | 4501 | struct composition_data *cmp_data = coding->cmp_data; |
b73bfc1c | 4502 | |
d46c5b12 | 4503 | setup_coding_system (XVECTOR (val)->contents[eol_type], coding); |
b73bfc1c KH |
4504 | coding->src_multibyte = src_multibyte; |
4505 | coding->dst_multibyte = dst_multibyte; | |
d46c5b12 | 4506 | coding->heading_ascii = skip; |
1cd6b64c | 4507 | coding->cmp_data = cmp_data; |
d46c5b12 KH |
4508 | } |
4509 | } | |
4510 | ||
4511 | #define CONVERSION_BUFFER_EXTRA_ROOM 256 | |
4512 | ||
b73bfc1c KH |
4513 | #define DECODING_BUFFER_MAG(coding) \ |
4514 | (coding->type == coding_type_iso2022 \ | |
4515 | ? 3 \ | |
4516 | : (coding->type == coding_type_ccl \ | |
4517 | ? coding->spec.ccl.decoder.buf_magnification \ | |
4518 | : 2)) | |
d46c5b12 KH |
4519 | |
4520 | /* Return maximum size (bytes) of a buffer enough for decoding | |
4521 | SRC_BYTES of text encoded in CODING. */ | |
4522 | ||
4523 | int | |
4524 | decoding_buffer_size (coding, src_bytes) | |
4525 | struct coding_system *coding; | |
4526 | int src_bytes; | |
4527 | { | |
4528 | return (src_bytes * DECODING_BUFFER_MAG (coding) | |
4529 | + CONVERSION_BUFFER_EXTRA_ROOM); | |
4530 | } | |
4531 | ||
4532 | /* Return maximum size (bytes) of a buffer enough for encoding | |
4533 | SRC_BYTES of text to CODING. */ | |
4534 | ||
4535 | int | |
4536 | encoding_buffer_size (coding, src_bytes) | |
4537 | struct coding_system *coding; | |
4538 | int src_bytes; | |
4539 | { | |
4540 | int magnification; | |
4541 | ||
4542 | if (coding->type == coding_type_ccl) | |
a84f1519 KH |
4543 | { |
4544 | magnification = coding->spec.ccl.encoder.buf_magnification; | |
4545 | if (coding->eol_type == CODING_EOL_CRLF) | |
4546 | magnification *= 2; | |
4547 | } | |
b73bfc1c | 4548 | else if (CODING_REQUIRE_ENCODING (coding)) |
d46c5b12 | 4549 | magnification = 3; |
b73bfc1c KH |
4550 | else |
4551 | magnification = 1; | |
d46c5b12 KH |
4552 | |
4553 | return (src_bytes * magnification + CONVERSION_BUFFER_EXTRA_ROOM); | |
4554 | } | |
4555 | ||
73be902c KH |
4556 | /* Working buffer for code conversion. */ |
4557 | struct conversion_buffer | |
4558 | { | |
4559 | int size; /* size of data. */ | |
4560 | int on_stack; /* 1 if allocated by alloca. */ | |
4561 | unsigned char *data; | |
4562 | }; | |
d46c5b12 | 4563 | |
73be902c KH |
4564 | /* Allocate LEN bytes of memory for BUF (struct conversion_buffer). */ |
4565 | #define allocate_conversion_buffer(buf, len) \ | |
4566 | do { \ | |
4567 | if (len < MAX_ALLOCA) \ | |
4568 | { \ | |
4569 | buf.data = (unsigned char *) alloca (len); \ | |
4570 | buf.on_stack = 1; \ | |
4571 | } \ | |
4572 | else \ | |
4573 | { \ | |
4574 | buf.data = (unsigned char *) xmalloc (len); \ | |
4575 | buf.on_stack = 0; \ | |
4576 | } \ | |
4577 | buf.size = len; \ | |
4578 | } while (0) | |
d46c5b12 | 4579 | |
73be902c KH |
4580 | /* Double the allocated memory for *BUF. */ |
4581 | static void | |
4582 | extend_conversion_buffer (buf) | |
4583 | struct conversion_buffer *buf; | |
d46c5b12 | 4584 | { |
73be902c | 4585 | if (buf->on_stack) |
d46c5b12 | 4586 | { |
73be902c KH |
4587 | unsigned char *save = buf->data; |
4588 | buf->data = (unsigned char *) xmalloc (buf->size * 2); | |
4589 | bcopy (save, buf->data, buf->size); | |
4590 | buf->on_stack = 0; | |
d46c5b12 | 4591 | } |
73be902c KH |
4592 | else |
4593 | { | |
4594 | buf->data = (unsigned char *) xrealloc (buf->data, buf->size * 2); | |
4595 | } | |
4596 | buf->size *= 2; | |
4597 | } | |
4598 | ||
4599 | /* Free the allocated memory for BUF if it is not on stack. */ | |
4600 | static void | |
4601 | free_conversion_buffer (buf) | |
4602 | struct conversion_buffer *buf; | |
4603 | { | |
4604 | if (!buf->on_stack) | |
4605 | xfree (buf->data); | |
d46c5b12 KH |
4606 | } |
4607 | ||
4608 | int | |
4609 | ccl_coding_driver (coding, source, destination, src_bytes, dst_bytes, encodep) | |
4610 | struct coding_system *coding; | |
4611 | unsigned char *source, *destination; | |
4612 | int src_bytes, dst_bytes, encodep; | |
4613 | { | |
4614 | struct ccl_program *ccl | |
4615 | = encodep ? &coding->spec.ccl.encoder : &coding->spec.ccl.decoder; | |
1c3478b0 | 4616 | unsigned char *dst = destination; |
d46c5b12 | 4617 | |
bd64290d | 4618 | ccl->suppress_error = coding->suppress_error; |
ae9ff118 | 4619 | ccl->last_block = coding->mode & CODING_MODE_LAST_BLOCK; |
aaaf0b1e | 4620 | if (encodep) |
80e0ca99 KH |
4621 | { |
4622 | /* On encoding, EOL format is converted within ccl_driver. For | |
4623 | that, setup proper information in the structure CCL. */ | |
4624 | ccl->eol_type = coding->eol_type; | |
4625 | if (ccl->eol_type ==CODING_EOL_UNDECIDED) | |
4626 | ccl->eol_type = CODING_EOL_LF; | |
4627 | ccl->cr_consumed = coding->spec.ccl.cr_carryover; | |
b671ed5e | 4628 | ccl->eight_bit_control = coding->dst_multibyte; |
80e0ca99 | 4629 | } |
b671ed5e KH |
4630 | else |
4631 | ccl->eight_bit_control = 1; | |
7272d75c | 4632 | ccl->multibyte = coding->src_multibyte; |
1c3478b0 KH |
4633 | if (coding->spec.ccl.eight_bit_carryover[0] != 0) |
4634 | { | |
4635 | /* Move carryover bytes to DESTINATION. */ | |
4636 | unsigned char *p = coding->spec.ccl.eight_bit_carryover; | |
4637 | while (*p) | |
4638 | *dst++ = *p++; | |
4639 | coding->spec.ccl.eight_bit_carryover[0] = 0; | |
4640 | if (dst_bytes) | |
4641 | dst_bytes -= dst - destination; | |
4642 | } | |
4643 | ||
4644 | coding->produced = (ccl_driver (ccl, source, dst, src_bytes, dst_bytes, | |
4645 | &(coding->consumed)) | |
4646 | + dst - destination); | |
4647 | ||
b73bfc1c | 4648 | if (encodep) |
80e0ca99 KH |
4649 | { |
4650 | coding->produced_char = coding->produced; | |
4651 | coding->spec.ccl.cr_carryover = ccl->cr_consumed; | |
4652 | } | |
ade8d05e KH |
4653 | else if (!ccl->eight_bit_control) |
4654 | { | |
4655 | /* The produced bytes forms a valid multibyte sequence. */ | |
4656 | coding->produced_char | |
4657 | = multibyte_chars_in_text (destination, coding->produced); | |
4658 | coding->spec.ccl.eight_bit_carryover[0] = 0; | |
4659 | } | |
b73bfc1c KH |
4660 | else |
4661 | { | |
1c3478b0 KH |
4662 | /* On decoding, the destination should always multibyte. But, |
4663 | CCL program might have been generated an invalid multibyte | |
4664 | sequence. Here we make such a sequence valid as | |
4665 | multibyte. */ | |
b73bfc1c KH |
4666 | int bytes |
4667 | = dst_bytes ? dst_bytes : source + coding->consumed - destination; | |
1c3478b0 KH |
4668 | |
4669 | if ((coding->consumed < src_bytes | |
4670 | || !ccl->last_block) | |
4671 | && coding->produced >= 1 | |
4672 | && destination[coding->produced - 1] >= 0x80) | |
4673 | { | |
4674 | /* We should not convert the tailing 8-bit codes to | |
4675 | multibyte form even if they doesn't form a valid | |
4676 | multibyte sequence. They may form a valid sequence in | |
4677 | the next call. */ | |
4678 | int carryover = 0; | |
4679 | ||
4680 | if (destination[coding->produced - 1] < 0xA0) | |
4681 | carryover = 1; | |
4682 | else if (coding->produced >= 2) | |
4683 | { | |
4684 | if (destination[coding->produced - 2] >= 0x80) | |
4685 | { | |
4686 | if (destination[coding->produced - 2] < 0xA0) | |
4687 | carryover = 2; | |
4688 | else if (coding->produced >= 3 | |
4689 | && destination[coding->produced - 3] >= 0x80 | |
4690 | && destination[coding->produced - 3] < 0xA0) | |
4691 | carryover = 3; | |
4692 | } | |
4693 | } | |
4694 | if (carryover > 0) | |
4695 | { | |
4696 | BCOPY_SHORT (destination + coding->produced - carryover, | |
4697 | coding->spec.ccl.eight_bit_carryover, | |
4698 | carryover); | |
4699 | coding->spec.ccl.eight_bit_carryover[carryover] = 0; | |
4700 | coding->produced -= carryover; | |
4701 | } | |
4702 | } | |
b73bfc1c KH |
4703 | coding->produced = str_as_multibyte (destination, bytes, |
4704 | coding->produced, | |
4705 | &(coding->produced_char)); | |
4706 | } | |
69f76525 | 4707 | |
d46c5b12 KH |
4708 | switch (ccl->status) |
4709 | { | |
4710 | case CCL_STAT_SUSPEND_BY_SRC: | |
73be902c | 4711 | coding->result = CODING_FINISH_INSUFFICIENT_SRC; |
d46c5b12 KH |
4712 | break; |
4713 | case CCL_STAT_SUSPEND_BY_DST: | |
73be902c | 4714 | coding->result = CODING_FINISH_INSUFFICIENT_DST; |
d46c5b12 | 4715 | break; |
9864ebce KH |
4716 | case CCL_STAT_QUIT: |
4717 | case CCL_STAT_INVALID_CMD: | |
73be902c | 4718 | coding->result = CODING_FINISH_INTERRUPT; |
9864ebce | 4719 | break; |
d46c5b12 | 4720 | default: |
73be902c | 4721 | coding->result = CODING_FINISH_NORMAL; |
d46c5b12 KH |
4722 | break; |
4723 | } | |
73be902c | 4724 | return coding->result; |
4ed46869 KH |
4725 | } |
4726 | ||
aaaf0b1e KH |
4727 | /* Decode EOL format of the text at PTR of BYTES length destructively |
4728 | according to CODING->eol_type. This is called after the CCL | |
4729 | program produced a decoded text at PTR. If we do CRLF->LF | |
4730 | conversion, update CODING->produced and CODING->produced_char. */ | |
4731 | ||
4732 | static void | |
4733 | decode_eol_post_ccl (coding, ptr, bytes) | |
4734 | struct coding_system *coding; | |
4735 | unsigned char *ptr; | |
4736 | int bytes; | |
4737 | { | |
4738 | Lisp_Object val, saved_coding_symbol; | |
4739 | unsigned char *pend = ptr + bytes; | |
4740 | int dummy; | |
4741 | ||
4742 | /* Remember the current coding system symbol. We set it back when | |
4743 | an inconsistent EOL is found so that `last-coding-system-used' is | |
4744 | set to the coding system that doesn't specify EOL conversion. */ | |
4745 | saved_coding_symbol = coding->symbol; | |
4746 | ||
4747 | coding->spec.ccl.cr_carryover = 0; | |
4748 | if (coding->eol_type == CODING_EOL_UNDECIDED) | |
4749 | { | |
4750 | /* Here, to avoid the call of setup_coding_system, we directly | |
4751 | call detect_eol_type. */ | |
4752 | coding->eol_type = detect_eol_type (ptr, bytes, &dummy); | |
74b01b80 EZ |
4753 | if (coding->eol_type == CODING_EOL_INCONSISTENT) |
4754 | coding->eol_type = CODING_EOL_LF; | |
4755 | if (coding->eol_type != CODING_EOL_UNDECIDED) | |
4756 | { | |
4757 | val = Fget (coding->symbol, Qeol_type); | |
4758 | if (VECTORP (val) && XVECTOR (val)->size == 3) | |
4759 | coding->symbol = XVECTOR (val)->contents[coding->eol_type]; | |
4760 | } | |
aaaf0b1e KH |
4761 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
4762 | } | |
4763 | ||
74b01b80 EZ |
4764 | if (coding->eol_type == CODING_EOL_LF |
4765 | || coding->eol_type == CODING_EOL_UNDECIDED) | |
aaaf0b1e KH |
4766 | { |
4767 | /* We have nothing to do. */ | |
4768 | ptr = pend; | |
4769 | } | |
4770 | else if (coding->eol_type == CODING_EOL_CRLF) | |
4771 | { | |
4772 | unsigned char *pstart = ptr, *p = ptr; | |
4773 | ||
4774 | if (! (coding->mode & CODING_MODE_LAST_BLOCK) | |
4775 | && *(pend - 1) == '\r') | |
4776 | { | |
4777 | /* If the last character is CR, we can't handle it here | |
4778 | because LF will be in the not-yet-decoded source text. | |
9861e777 | 4779 | Record that the CR is not yet processed. */ |
aaaf0b1e KH |
4780 | coding->spec.ccl.cr_carryover = 1; |
4781 | coding->produced--; | |
4782 | coding->produced_char--; | |
4783 | pend--; | |
4784 | } | |
4785 | while (ptr < pend) | |
4786 | { | |
4787 | if (*ptr == '\r') | |
4788 | { | |
4789 | if (ptr + 1 < pend && *(ptr + 1) == '\n') | |
4790 | { | |
4791 | *p++ = '\n'; | |
4792 | ptr += 2; | |
4793 | } | |
4794 | else | |
4795 | { | |
4796 | if (coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4797 | goto undo_eol_conversion; | |
4798 | *p++ = *ptr++; | |
4799 | } | |
4800 | } | |
4801 | else if (*ptr == '\n' | |
4802 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4803 | goto undo_eol_conversion; | |
4804 | else | |
4805 | *p++ = *ptr++; | |
4806 | continue; | |
4807 | ||
4808 | undo_eol_conversion: | |
4809 | /* We have faced with inconsistent EOL format at PTR. | |
4810 | Convert all LFs before PTR back to CRLFs. */ | |
4811 | for (p--, ptr--; p >= pstart; p--) | |
4812 | { | |
4813 | if (*p == '\n') | |
4814 | *ptr-- = '\n', *ptr-- = '\r'; | |
4815 | else | |
4816 | *ptr-- = *p; | |
4817 | } | |
4818 | /* If carryover is recorded, cancel it because we don't | |
4819 | convert CRLF anymore. */ | |
4820 | if (coding->spec.ccl.cr_carryover) | |
4821 | { | |
4822 | coding->spec.ccl.cr_carryover = 0; | |
4823 | coding->produced++; | |
4824 | coding->produced_char++; | |
4825 | pend++; | |
4826 | } | |
4827 | p = ptr = pend; | |
4828 | coding->eol_type = CODING_EOL_LF; | |
4829 | coding->symbol = saved_coding_symbol; | |
4830 | } | |
4831 | if (p < pend) | |
4832 | { | |
4833 | /* As each two-byte sequence CRLF was converted to LF, (PEND | |
4834 | - P) is the number of deleted characters. */ | |
4835 | coding->produced -= pend - p; | |
4836 | coding->produced_char -= pend - p; | |
4837 | } | |
4838 | } | |
4839 | else /* i.e. coding->eol_type == CODING_EOL_CR */ | |
4840 | { | |
4841 | unsigned char *p = ptr; | |
4842 | ||
4843 | for (; ptr < pend; ptr++) | |
4844 | { | |
4845 | if (*ptr == '\r') | |
4846 | *ptr = '\n'; | |
4847 | else if (*ptr == '\n' | |
4848 | && coding->mode & CODING_MODE_INHIBIT_INCONSISTENT_EOL) | |
4849 | { | |
4850 | for (; p < ptr; p++) | |
4851 | { | |
4852 | if (*p == '\n') | |
4853 | *p = '\r'; | |
4854 | } | |
4855 | ptr = pend; | |
4856 | coding->eol_type = CODING_EOL_LF; | |
4857 | coding->symbol = saved_coding_symbol; | |
4858 | } | |
4859 | } | |
4860 | } | |
4861 | } | |
4862 | ||
4ed46869 KH |
4863 | /* See "GENERAL NOTES about `decode_coding_XXX ()' functions". Before |
4864 | decoding, it may detect coding system and format of end-of-line if | |
b73bfc1c KH |
4865 | those are not yet decided. The source should be unibyte, the |
4866 | result is multibyte if CODING->dst_multibyte is nonzero, else | |
4867 | unibyte. */ | |
4ed46869 KH |
4868 | |
4869 | int | |
d46c5b12 | 4870 | decode_coding (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 4871 | struct coding_system *coding; |
a4244313 KR |
4872 | const unsigned char *source; |
4873 | unsigned char *destination; | |
4ed46869 | 4874 | int src_bytes, dst_bytes; |
4ed46869 | 4875 | { |
9861e777 EZ |
4876 | int extra = 0; |
4877 | ||
0ef69138 | 4878 | if (coding->type == coding_type_undecided) |
4ed46869 KH |
4879 | detect_coding (coding, source, src_bytes); |
4880 | ||
aaaf0b1e KH |
4881 | if (coding->eol_type == CODING_EOL_UNDECIDED |
4882 | && coding->type != coding_type_ccl) | |
8844fa83 KH |
4883 | { |
4884 | detect_eol (coding, source, src_bytes); | |
4885 | /* We had better recover the original eol format if we | |
8ca3766a | 4886 | encounter an inconsistent eol format while decoding. */ |
8844fa83 KH |
4887 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
4888 | } | |
4ed46869 | 4889 | |
b73bfc1c KH |
4890 | coding->produced = coding->produced_char = 0; |
4891 | coding->consumed = coding->consumed_char = 0; | |
4892 | coding->errors = 0; | |
4893 | coding->result = CODING_FINISH_NORMAL; | |
4894 | ||
4ed46869 KH |
4895 | switch (coding->type) |
4896 | { | |
4ed46869 | 4897 | case coding_type_sjis: |
b73bfc1c KH |
4898 | decode_coding_sjis_big5 (coding, source, destination, |
4899 | src_bytes, dst_bytes, 1); | |
4ed46869 KH |
4900 | break; |
4901 | ||
4902 | case coding_type_iso2022: | |
b73bfc1c KH |
4903 | decode_coding_iso2022 (coding, source, destination, |
4904 | src_bytes, dst_bytes); | |
4ed46869 KH |
4905 | break; |
4906 | ||
4907 | case coding_type_big5: | |
b73bfc1c KH |
4908 | decode_coding_sjis_big5 (coding, source, destination, |
4909 | src_bytes, dst_bytes, 0); | |
4910 | break; | |
4911 | ||
4912 | case coding_type_emacs_mule: | |
4913 | decode_coding_emacs_mule (coding, source, destination, | |
4914 | src_bytes, dst_bytes); | |
4ed46869 KH |
4915 | break; |
4916 | ||
4917 | case coding_type_ccl: | |
aaaf0b1e KH |
4918 | if (coding->spec.ccl.cr_carryover) |
4919 | { | |
9861e777 EZ |
4920 | /* Put the CR which was not processed by the previous call |
4921 | of decode_eol_post_ccl in DESTINATION. It will be | |
4922 | decoded together with the following LF by the call to | |
4923 | decode_eol_post_ccl below. */ | |
aaaf0b1e KH |
4924 | *destination = '\r'; |
4925 | coding->produced++; | |
4926 | coding->produced_char++; | |
4927 | dst_bytes--; | |
9861e777 | 4928 | extra = coding->spec.ccl.cr_carryover; |
aaaf0b1e | 4929 | } |
9861e777 | 4930 | ccl_coding_driver (coding, source, destination + extra, |
b73bfc1c | 4931 | src_bytes, dst_bytes, 0); |
aaaf0b1e | 4932 | if (coding->eol_type != CODING_EOL_LF) |
9861e777 EZ |
4933 | { |
4934 | coding->produced += extra; | |
4935 | coding->produced_char += extra; | |
4936 | decode_eol_post_ccl (coding, destination, coding->produced); | |
4937 | } | |
d46c5b12 KH |
4938 | break; |
4939 | ||
b73bfc1c KH |
4940 | default: |
4941 | decode_eol (coding, source, destination, src_bytes, dst_bytes); | |
4942 | } | |
4943 | ||
4944 | if (coding->result == CODING_FINISH_INSUFFICIENT_SRC | |
e7c9eef9 | 4945 | && coding->mode & CODING_MODE_LAST_BLOCK |
b73bfc1c KH |
4946 | && coding->consumed == src_bytes) |
4947 | coding->result = CODING_FINISH_NORMAL; | |
4948 | ||
4949 | if (coding->mode & CODING_MODE_LAST_BLOCK | |
4950 | && coding->result == CODING_FINISH_INSUFFICIENT_SRC) | |
4951 | { | |
a4244313 | 4952 | const unsigned char *src = source + coding->consumed; |
b73bfc1c KH |
4953 | unsigned char *dst = destination + coding->produced; |
4954 | ||
4955 | src_bytes -= coding->consumed; | |
bb10be8b | 4956 | coding->errors++; |
b73bfc1c KH |
4957 | if (COMPOSING_P (coding)) |
4958 | DECODE_COMPOSITION_END ('1'); | |
4959 | while (src_bytes--) | |
d46c5b12 | 4960 | { |
b73bfc1c KH |
4961 | int c = *src++; |
4962 | dst += CHAR_STRING (c, dst); | |
4963 | coding->produced_char++; | |
d46c5b12 | 4964 | } |
b73bfc1c KH |
4965 | coding->consumed = coding->consumed_char = src - source; |
4966 | coding->produced = dst - destination; | |
73be902c | 4967 | coding->result = CODING_FINISH_NORMAL; |
4ed46869 KH |
4968 | } |
4969 | ||
b73bfc1c KH |
4970 | if (!coding->dst_multibyte) |
4971 | { | |
4972 | coding->produced = str_as_unibyte (destination, coding->produced); | |
4973 | coding->produced_char = coding->produced; | |
4974 | } | |
4ed46869 | 4975 | |
b73bfc1c KH |
4976 | return coding->result; |
4977 | } | |
52d41803 | 4978 | |
b73bfc1c KH |
4979 | /* See "GENERAL NOTES about `encode_coding_XXX ()' functions". The |
4980 | multibyteness of the source is CODING->src_multibyte, the | |
4981 | multibyteness of the result is always unibyte. */ | |
4ed46869 KH |
4982 | |
4983 | int | |
d46c5b12 | 4984 | encode_coding (coding, source, destination, src_bytes, dst_bytes) |
4ed46869 | 4985 | struct coding_system *coding; |
a4244313 KR |
4986 | const unsigned char *source; |
4987 | unsigned char *destination; | |
4ed46869 | 4988 | int src_bytes, dst_bytes; |
4ed46869 | 4989 | { |
b73bfc1c KH |
4990 | coding->produced = coding->produced_char = 0; |
4991 | coding->consumed = coding->consumed_char = 0; | |
4992 | coding->errors = 0; | |
4993 | coding->result = CODING_FINISH_NORMAL; | |
4ed46869 | 4994 | |
d46c5b12 KH |
4995 | switch (coding->type) |
4996 | { | |
4ed46869 | 4997 | case coding_type_sjis: |
b73bfc1c KH |
4998 | encode_coding_sjis_big5 (coding, source, destination, |
4999 | src_bytes, dst_bytes, 1); | |
4ed46869 KH |
5000 | break; |
5001 | ||
5002 | case coding_type_iso2022: | |
b73bfc1c KH |
5003 | encode_coding_iso2022 (coding, source, destination, |
5004 | src_bytes, dst_bytes); | |
4ed46869 KH |
5005 | break; |
5006 | ||
5007 | case coding_type_big5: | |
b73bfc1c KH |
5008 | encode_coding_sjis_big5 (coding, source, destination, |
5009 | src_bytes, dst_bytes, 0); | |
5010 | break; | |
5011 | ||
5012 | case coding_type_emacs_mule: | |
5013 | encode_coding_emacs_mule (coding, source, destination, | |
5014 | src_bytes, dst_bytes); | |
4ed46869 KH |
5015 | break; |
5016 | ||
5017 | case coding_type_ccl: | |
b73bfc1c KH |
5018 | ccl_coding_driver (coding, source, destination, |
5019 | src_bytes, dst_bytes, 1); | |
d46c5b12 KH |
5020 | break; |
5021 | ||
b73bfc1c KH |
5022 | default: |
5023 | encode_eol (coding, source, destination, src_bytes, dst_bytes); | |
5024 | } | |
5025 | ||
73be902c KH |
5026 | if (coding->mode & CODING_MODE_LAST_BLOCK |
5027 | && coding->result == CODING_FINISH_INSUFFICIENT_SRC) | |
b73bfc1c | 5028 | { |
a4244313 | 5029 | const unsigned char *src = source + coding->consumed; |
b73bfc1c KH |
5030 | unsigned char *dst = destination + coding->produced; |
5031 | ||
5032 | if (coding->type == coding_type_iso2022) | |
5033 | ENCODE_RESET_PLANE_AND_REGISTER; | |
5034 | if (COMPOSING_P (coding)) | |
5035 | *dst++ = ISO_CODE_ESC, *dst++ = '1'; | |
5036 | if (coding->consumed < src_bytes) | |
d46c5b12 | 5037 | { |
b73bfc1c KH |
5038 | int len = src_bytes - coding->consumed; |
5039 | ||
fabf4a91 | 5040 | BCOPY_SHORT (src, dst, len); |
b73bfc1c KH |
5041 | if (coding->src_multibyte) |
5042 | len = str_as_unibyte (dst, len); | |
5043 | dst += len; | |
5044 | coding->consumed = src_bytes; | |
d46c5b12 | 5045 | } |
b73bfc1c | 5046 | coding->produced = coding->produced_char = dst - destination; |
73be902c | 5047 | coding->result = CODING_FINISH_NORMAL; |
4ed46869 KH |
5048 | } |
5049 | ||
bb10be8b KH |
5050 | if (coding->result == CODING_FINISH_INSUFFICIENT_SRC |
5051 | && coding->consumed == src_bytes) | |
5052 | coding->result = CODING_FINISH_NORMAL; | |
5053 | ||
b73bfc1c | 5054 | return coding->result; |
4ed46869 KH |
5055 | } |
5056 | ||
fb88bf2d KH |
5057 | /* Scan text in the region between *BEG and *END (byte positions), |
5058 | skip characters which we don't have to decode by coding system | |
5059 | CODING at the head and tail, then set *BEG and *END to the region | |
5060 | of the text we actually have to convert. The caller should move | |
b73bfc1c KH |
5061 | the gap out of the region in advance if the region is from a |
5062 | buffer. | |
4ed46869 | 5063 | |
d46c5b12 KH |
5064 | If STR is not NULL, *BEG and *END are indices into STR. */ |
5065 | ||
5066 | static void | |
5067 | shrink_decoding_region (beg, end, coding, str) | |
5068 | int *beg, *end; | |
5069 | struct coding_system *coding; | |
5070 | unsigned char *str; | |
5071 | { | |
fb88bf2d | 5072 | unsigned char *begp_orig, *begp, *endp_orig, *endp, c; |
d46c5b12 | 5073 | int eol_conversion; |
88993dfd | 5074 | Lisp_Object translation_table; |
d46c5b12 KH |
5075 | |
5076 | if (coding->type == coding_type_ccl | |
5077 | || coding->type == coding_type_undecided | |
b73bfc1c KH |
5078 | || coding->eol_type != CODING_EOL_LF |
5079 | || !NILP (coding->post_read_conversion) | |
5080 | || coding->composing != COMPOSITION_DISABLED) | |
d46c5b12 KH |
5081 | { |
5082 | /* We can't skip any data. */ | |
5083 | return; | |
5084 | } | |
b73bfc1c KH |
5085 | if (coding->type == coding_type_no_conversion |
5086 | || coding->type == coding_type_raw_text | |
5087 | || coding->type == coding_type_emacs_mule) | |
d46c5b12 | 5088 | { |
fb88bf2d KH |
5089 | /* We need no conversion, but don't have to skip any data here. |
5090 | Decoding routine handles them effectively anyway. */ | |
d46c5b12 KH |
5091 | return; |
5092 | } | |
5093 | ||
88993dfd KH |
5094 | translation_table = coding->translation_table_for_decode; |
5095 | if (NILP (translation_table) && !NILP (Venable_character_translation)) | |
5096 | translation_table = Vstandard_translation_table_for_decode; | |
5097 | if (CHAR_TABLE_P (translation_table)) | |
5098 | { | |
5099 | int i; | |
5100 | for (i = 0; i < 128; i++) | |
5101 | if (!NILP (CHAR_TABLE_REF (translation_table, i))) | |
5102 | break; | |
5103 | if (i < 128) | |
fa46990e | 5104 | /* Some ASCII character should be translated. We give up |
88993dfd KH |
5105 | shrinking. */ |
5106 | return; | |
5107 | } | |
5108 | ||
b73bfc1c | 5109 | if (coding->heading_ascii >= 0) |
d46c5b12 KH |
5110 | /* Detection routine has already found how much we can skip at the |
5111 | head. */ | |
5112 | *beg += coding->heading_ascii; | |
5113 | ||
5114 | if (str) | |
5115 | { | |
5116 | begp_orig = begp = str + *beg; | |
5117 | endp_orig = endp = str + *end; | |
5118 | } | |
5119 | else | |
5120 | { | |
fb88bf2d | 5121 | begp_orig = begp = BYTE_POS_ADDR (*beg); |
d46c5b12 KH |
5122 | endp_orig = endp = begp + *end - *beg; |
5123 | } | |
5124 | ||
fa46990e DL |
5125 | eol_conversion = (coding->eol_type == CODING_EOL_CR |
5126 | || coding->eol_type == CODING_EOL_CRLF); | |
5127 | ||
d46c5b12 KH |
5128 | switch (coding->type) |
5129 | { | |
d46c5b12 KH |
5130 | case coding_type_sjis: |
5131 | case coding_type_big5: | |
5132 | /* We can skip all ASCII characters at the head. */ | |
5133 | if (coding->heading_ascii < 0) | |
5134 | { | |
5135 | if (eol_conversion) | |
de9d083c | 5136 | while (begp < endp && *begp < 0x80 && *begp != '\r') begp++; |
d46c5b12 KH |
5137 | else |
5138 | while (begp < endp && *begp < 0x80) begp++; | |
5139 | } | |
5140 | /* We can skip all ASCII characters at the tail except for the | |
5141 | second byte of SJIS or BIG5 code. */ | |
5142 | if (eol_conversion) | |
de9d083c | 5143 | while (begp < endp && endp[-1] < 0x80 && endp[-1] != '\r') endp--; |
d46c5b12 KH |
5144 | else |
5145 | while (begp < endp && endp[-1] < 0x80) endp--; | |
ee59c65f RS |
5146 | /* Do not consider LF as ascii if preceded by CR, since that |
5147 | confuses eol decoding. */ | |
5148 | if (begp < endp && endp < endp_orig && endp[-1] == '\r' && endp[0] == '\n') | |
5149 | endp++; | |
d46c5b12 KH |
5150 | if (begp < endp && endp < endp_orig && endp[-1] >= 0x80) |
5151 | endp++; | |
5152 | break; | |
5153 | ||
b73bfc1c | 5154 | case coding_type_iso2022: |
622fece5 KH |
5155 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, 0) != CHARSET_ASCII) |
5156 | /* We can't skip any data. */ | |
5157 | break; | |
d46c5b12 KH |
5158 | if (coding->heading_ascii < 0) |
5159 | { | |
d46c5b12 KH |
5160 | /* We can skip all ASCII characters at the head except for a |
5161 | few control codes. */ | |
5162 | while (begp < endp && (c = *begp) < 0x80 | |
5163 | && c != ISO_CODE_CR && c != ISO_CODE_SO | |
5164 | && c != ISO_CODE_SI && c != ISO_CODE_ESC | |
5165 | && (!eol_conversion || c != ISO_CODE_LF)) | |
5166 | begp++; | |
5167 | } | |
5168 | switch (coding->category_idx) | |
5169 | { | |
5170 | case CODING_CATEGORY_IDX_ISO_8_1: | |
5171 | case CODING_CATEGORY_IDX_ISO_8_2: | |
5172 | /* We can skip all ASCII characters at the tail. */ | |
5173 | if (eol_conversion) | |
de9d083c | 5174 | while (begp < endp && (c = endp[-1]) < 0x80 && c != '\r') endp--; |
d46c5b12 KH |
5175 | else |
5176 | while (begp < endp && endp[-1] < 0x80) endp--; | |
ee59c65f RS |
5177 | /* Do not consider LF as ascii if preceded by CR, since that |
5178 | confuses eol decoding. */ | |
5179 | if (begp < endp && endp < endp_orig && endp[-1] == '\r' && endp[0] == '\n') | |
5180 | endp++; | |
d46c5b12 KH |
5181 | break; |
5182 | ||
5183 | case CODING_CATEGORY_IDX_ISO_7: | |
5184 | case CODING_CATEGORY_IDX_ISO_7_TIGHT: | |
de79a6a5 | 5185 | { |
8ca3766a | 5186 | /* We can skip all characters at the tail except for 8-bit |
de79a6a5 KH |
5187 | codes and ESC and the following 2-byte at the tail. */ |
5188 | unsigned char *eight_bit = NULL; | |
5189 | ||
5190 | if (eol_conversion) | |
5191 | while (begp < endp | |
5192 | && (c = endp[-1]) != ISO_CODE_ESC && c != '\r') | |
5193 | { | |
5194 | if (!eight_bit && c & 0x80) eight_bit = endp; | |
5195 | endp--; | |
5196 | } | |
5197 | else | |
5198 | while (begp < endp | |
5199 | && (c = endp[-1]) != ISO_CODE_ESC) | |
5200 | { | |
5201 | if (!eight_bit && c & 0x80) eight_bit = endp; | |
5202 | endp--; | |
5203 | } | |
5204 | /* Do not consider LF as ascii if preceded by CR, since that | |
5205 | confuses eol decoding. */ | |
5206 | if (begp < endp && endp < endp_orig | |
5207 | && endp[-1] == '\r' && endp[0] == '\n') | |
5208 | endp++; | |
5209 | if (begp < endp && endp[-1] == ISO_CODE_ESC) | |
5210 | { | |
5211 | if (endp + 1 < endp_orig && end[0] == '(' && end[1] == 'B') | |
5212 | /* This is an ASCII designation sequence. We can | |
5213 | surely skip the tail. But, if we have | |
5214 | encountered an 8-bit code, skip only the codes | |
5215 | after that. */ | |
5216 | endp = eight_bit ? eight_bit : endp + 2; | |
5217 | else | |
5218 | /* Hmmm, we can't skip the tail. */ | |
5219 | endp = endp_orig; | |
5220 | } | |
5221 | else if (eight_bit) | |
5222 | endp = eight_bit; | |
5223 | } | |
d46c5b12 | 5224 | } |
b73bfc1c KH |
5225 | break; |
5226 | ||
5227 | default: | |
5228 | abort (); | |
d46c5b12 KH |
5229 | } |
5230 | *beg += begp - begp_orig; | |
5231 | *end += endp - endp_orig; | |
5232 | return; | |
5233 | } | |
5234 | ||
5235 | /* Like shrink_decoding_region but for encoding. */ | |
5236 | ||
5237 | static void | |
5238 | shrink_encoding_region (beg, end, coding, str) | |
5239 | int *beg, *end; | |
5240 | struct coding_system *coding; | |
5241 | unsigned char *str; | |
5242 | { | |
5243 | unsigned char *begp_orig, *begp, *endp_orig, *endp; | |
5244 | int eol_conversion; | |
88993dfd | 5245 | Lisp_Object translation_table; |
d46c5b12 | 5246 | |
b73bfc1c KH |
5247 | if (coding->type == coding_type_ccl |
5248 | || coding->eol_type == CODING_EOL_CRLF | |
5249 | || coding->eol_type == CODING_EOL_CR | |
87323294 | 5250 | || (coding->cmp_data && coding->cmp_data->used > 0)) |
d46c5b12 | 5251 | { |
b73bfc1c KH |
5252 | /* We can't skip any data. */ |
5253 | return; | |
5254 | } | |
5255 | if (coding->type == coding_type_no_conversion | |
5256 | || coding->type == coding_type_raw_text | |
5257 | || coding->type == coding_type_emacs_mule | |
5258 | || coding->type == coding_type_undecided) | |
5259 | { | |
5260 | /* We need no conversion, but don't have to skip any data here. | |
5261 | Encoding routine handles them effectively anyway. */ | |
d46c5b12 KH |
5262 | return; |
5263 | } | |
5264 | ||
88993dfd KH |
5265 | translation_table = coding->translation_table_for_encode; |
5266 | if (NILP (translation_table) && !NILP (Venable_character_translation)) | |
5267 | translation_table = Vstandard_translation_table_for_encode; | |
5268 | if (CHAR_TABLE_P (translation_table)) | |
5269 | { | |
5270 | int i; | |
5271 | for (i = 0; i < 128; i++) | |
5272 | if (!NILP (CHAR_TABLE_REF (translation_table, i))) | |
5273 | break; | |
5274 | if (i < 128) | |
8ca3766a | 5275 | /* Some ASCII character should be translated. We give up |
88993dfd KH |
5276 | shrinking. */ |
5277 | return; | |
5278 | } | |
5279 | ||
d46c5b12 KH |
5280 | if (str) |
5281 | { | |
5282 | begp_orig = begp = str + *beg; | |
5283 | endp_orig = endp = str + *end; | |
5284 | } | |
5285 | else | |
5286 | { | |
fb88bf2d | 5287 | begp_orig = begp = BYTE_POS_ADDR (*beg); |
d46c5b12 KH |
5288 | endp_orig = endp = begp + *end - *beg; |
5289 | } | |
5290 | ||
5291 | eol_conversion = (coding->eol_type == CODING_EOL_CR | |
5292 | || coding->eol_type == CODING_EOL_CRLF); | |
5293 | ||
5294 | /* Here, we don't have to check coding->pre_write_conversion because | |
5295 | the caller is expected to have handled it already. */ | |
5296 | switch (coding->type) | |
5297 | { | |
d46c5b12 | 5298 | case coding_type_iso2022: |
622fece5 KH |
5299 | if (CODING_SPEC_ISO_INITIAL_DESIGNATION (coding, 0) != CHARSET_ASCII) |
5300 | /* We can't skip any data. */ | |
5301 | break; | |
d46c5b12 KH |
5302 | if (coding->flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL) |
5303 | { | |
93dec019 | 5304 | unsigned char *bol = begp; |
d46c5b12 KH |
5305 | while (begp < endp && *begp < 0x80) |
5306 | { | |
5307 | begp++; | |
5308 | if (begp[-1] == '\n') | |
5309 | bol = begp; | |
5310 | } | |
5311 | begp = bol; | |
5312 | goto label_skip_tail; | |
5313 | } | |
5314 | /* fall down ... */ | |
5315 | ||
b73bfc1c KH |
5316 | case coding_type_sjis: |
5317 | case coding_type_big5: | |
d46c5b12 KH |
5318 | /* We can skip all ASCII characters at the head and tail. */ |
5319 | if (eol_conversion) | |
5320 | while (begp < endp && *begp < 0x80 && *begp != '\n') begp++; | |
5321 | else | |
5322 | while (begp < endp && *begp < 0x80) begp++; | |
5323 | label_skip_tail: | |
5324 | if (eol_conversion) | |
5325 | while (begp < endp && endp[-1] < 0x80 && endp[-1] != '\n') endp--; | |
5326 | else | |
5327 | while (begp < endp && *(endp - 1) < 0x80) endp--; | |
5328 | break; | |
b73bfc1c KH |
5329 | |
5330 | default: | |
5331 | abort (); | |
d46c5b12 KH |
5332 | } |
5333 | ||
5334 | *beg += begp - begp_orig; | |
5335 | *end += endp - endp_orig; | |
5336 | return; | |
5337 | } | |
5338 | ||
88993dfd KH |
5339 | /* As shrinking conversion region requires some overhead, we don't try |
5340 | shrinking if the length of conversion region is less than this | |
5341 | value. */ | |
5342 | static int shrink_conversion_region_threshhold = 1024; | |
5343 | ||
5344 | #define SHRINK_CONVERSION_REGION(beg, end, coding, str, encodep) \ | |
5345 | do { \ | |
5346 | if (*(end) - *(beg) > shrink_conversion_region_threshhold) \ | |
5347 | { \ | |
5348 | if (encodep) shrink_encoding_region (beg, end, coding, str); \ | |
5349 | else shrink_decoding_region (beg, end, coding, str); \ | |
5350 | } \ | |
5351 | } while (0) | |
5352 | ||
24a2b282 KH |
5353 | /* ARG is (CODING BUFFER ...) where CODING is what to be set in |
5354 | Vlast_coding_system_used and the remaining elements are buffers to | |
16ef9c56 | 5355 | kill. */ |
b843d1ae | 5356 | static Lisp_Object |
1c7457e2 KH |
5357 | code_convert_region_unwind (arg) |
5358 | Lisp_Object arg; | |
b843d1ae | 5359 | { |
89aa725a KH |
5360 | struct gcpro gcpro1; |
5361 | GCPRO1 (arg); | |
5362 | ||
b843d1ae | 5363 | inhibit_pre_post_conversion = 0; |
16ef9c56 | 5364 | Vlast_coding_system_used = XCAR (arg); |
24a2b282 KH |
5365 | for (arg = XCDR (arg); ! NILP (arg); arg = XCDR (arg)) |
5366 | Fkill_buffer (XCAR (arg)); | |
89aa725a KH |
5367 | |
5368 | UNGCPRO; | |
b843d1ae KH |
5369 | return Qnil; |
5370 | } | |
5371 | ||
ec6d2bb8 KH |
5372 | /* Store information about all compositions in the range FROM and TO |
5373 | of OBJ in memory blocks pointed by CODING->cmp_data. OBJ is a | |
5374 | buffer or a string, defaults to the current buffer. */ | |
5375 | ||
5376 | void | |
5377 | coding_save_composition (coding, from, to, obj) | |
5378 | struct coding_system *coding; | |
5379 | int from, to; | |
5380 | Lisp_Object obj; | |
5381 | { | |
5382 | Lisp_Object prop; | |
5383 | int start, end; | |
5384 | ||
91bee881 KH |
5385 | if (coding->composing == COMPOSITION_DISABLED) |
5386 | return; | |
5387 | if (!coding->cmp_data) | |
5388 | coding_allocate_composition_data (coding, from); | |
ec6d2bb8 KH |
5389 | if (!find_composition (from, to, &start, &end, &prop, obj) |
5390 | || end > to) | |
5391 | return; | |
5392 | if (start < from | |
5393 | && (!find_composition (end, to, &start, &end, &prop, obj) | |
5394 | || end > to)) | |
5395 | return; | |
5396 | coding->composing = COMPOSITION_NO; | |
ec6d2bb8 KH |
5397 | do |
5398 | { | |
5399 | if (COMPOSITION_VALID_P (start, end, prop)) | |
5400 | { | |
5401 | enum composition_method method = COMPOSITION_METHOD (prop); | |
5402 | if (coding->cmp_data->used + COMPOSITION_DATA_MAX_BUNCH_LENGTH | |
5403 | >= COMPOSITION_DATA_SIZE) | |
5404 | coding_allocate_composition_data (coding, from); | |
5405 | /* For relative composition, we remember start and end | |
5406 | positions, for the other compositions, we also remember | |
5407 | components. */ | |
5408 | CODING_ADD_COMPOSITION_START (coding, start - from, method); | |
5409 | if (method != COMPOSITION_RELATIVE) | |
5410 | { | |
5411 | /* We must store a*/ | |
5412 | Lisp_Object val, ch; | |
5413 | ||
5414 | val = COMPOSITION_COMPONENTS (prop); | |
5415 | if (CONSP (val)) | |
5416 | while (CONSP (val)) | |
5417 | { | |
5418 | ch = XCAR (val), val = XCDR (val); | |
5419 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (ch)); | |
5420 | } | |
5421 | else if (VECTORP (val) || STRINGP (val)) | |
5422 | { | |
5423 | int len = (VECTORP (val) | |
d5db4077 | 5424 | ? XVECTOR (val)->size : SCHARS (val)); |
ec6d2bb8 KH |
5425 | int i; |
5426 | for (i = 0; i < len; i++) | |
5427 | { | |
5428 | ch = (STRINGP (val) | |
5429 | ? Faref (val, make_number (i)) | |
5430 | : XVECTOR (val)->contents[i]); | |
5431 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (ch)); | |
5432 | } | |
5433 | } | |
5434 | else /* INTEGERP (val) */ | |
5435 | CODING_ADD_COMPOSITION_COMPONENT (coding, XINT (val)); | |
5436 | } | |
5437 | CODING_ADD_COMPOSITION_END (coding, end - from); | |
5438 | } | |
5439 | start = end; | |
5440 | } | |
5441 | while (start < to | |
5442 | && find_composition (start, to, &start, &end, &prop, obj) | |
5443 | && end <= to); | |
5444 | ||
5445 | /* Make coding->cmp_data point to the first memory block. */ | |
5446 | while (coding->cmp_data->prev) | |
5447 | coding->cmp_data = coding->cmp_data->prev; | |
5448 | coding->cmp_data_start = 0; | |
5449 | } | |
5450 | ||
5451 | /* Reflect the saved information about compositions to OBJ. | |
8ca3766a | 5452 | CODING->cmp_data points to a memory block for the information. OBJ |
ec6d2bb8 KH |
5453 | is a buffer or a string, defaults to the current buffer. */ |
5454 | ||
33fb63eb | 5455 | void |
ec6d2bb8 KH |
5456 | coding_restore_composition (coding, obj) |
5457 | struct coding_system *coding; | |
5458 | Lisp_Object obj; | |
5459 | { | |
5460 | struct composition_data *cmp_data = coding->cmp_data; | |
5461 | ||
5462 | if (!cmp_data) | |
5463 | return; | |
5464 | ||
5465 | while (cmp_data->prev) | |
5466 | cmp_data = cmp_data->prev; | |
5467 | ||
5468 | while (cmp_data) | |
5469 | { | |
5470 | int i; | |
5471 | ||
78108bcd KH |
5472 | for (i = 0; i < cmp_data->used && cmp_data->data[i] > 0; |
5473 | i += cmp_data->data[i]) | |
ec6d2bb8 KH |
5474 | { |
5475 | int *data = cmp_data->data + i; | |
5476 | enum composition_method method = (enum composition_method) data[3]; | |
5477 | Lisp_Object components; | |
5478 | ||
4307d534 KH |
5479 | if (data[0] < 0 || i + data[0] > cmp_data->used) |
5480 | /* Invalid composition data. */ | |
5481 | break; | |
5482 | ||
ec6d2bb8 KH |
5483 | if (method == COMPOSITION_RELATIVE) |
5484 | components = Qnil; | |
5485 | else | |
5486 | { | |
5487 | int len = data[0] - 4, j; | |
5488 | Lisp_Object args[MAX_COMPOSITION_COMPONENTS * 2 - 1]; | |
5489 | ||
b6871cc7 KH |
5490 | if (method == COMPOSITION_WITH_RULE_ALTCHARS |
5491 | && len % 2 == 0) | |
5492 | len --; | |
09721b31 KH |
5493 | if (len < 1) |
5494 | /* Invalid composition data. */ | |
5495 | break; | |
ec6d2bb8 KH |
5496 | for (j = 0; j < len; j++) |
5497 | args[j] = make_number (data[4 + j]); | |
5498 | components = (method == COMPOSITION_WITH_ALTCHARS | |
316d4bf9 SM |
5499 | ? Fstring (len, args) |
5500 | : Fvector (len, args)); | |
ec6d2bb8 KH |
5501 | } |
5502 | compose_text (data[1], data[2], components, Qnil, obj); | |
5503 | } | |
5504 | cmp_data = cmp_data->next; | |
5505 | } | |
5506 | } | |
5507 | ||
d46c5b12 | 5508 | /* Decode (if ENCODEP is zero) or encode (if ENCODEP is nonzero) the |
fb88bf2d KH |
5509 | text from FROM to TO (byte positions are FROM_BYTE and TO_BYTE) by |
5510 | coding system CODING, and return the status code of code conversion | |
5511 | (currently, this value has no meaning). | |
5512 | ||
5513 | How many characters (and bytes) are converted to how many | |
5514 | characters (and bytes) are recorded in members of the structure | |
5515 | CODING. | |
d46c5b12 | 5516 | |
6e44253b | 5517 | If REPLACE is nonzero, we do various things as if the original text |
d46c5b12 | 5518 | is deleted and a new text is inserted. See the comments in |
b73bfc1c KH |
5519 | replace_range (insdel.c) to know what we are doing. |
5520 | ||
5521 | If REPLACE is zero, it is assumed that the source text is unibyte. | |
8ca3766a | 5522 | Otherwise, it is assumed that the source text is multibyte. */ |
4ed46869 KH |
5523 | |
5524 | int | |
6e44253b KH |
5525 | code_convert_region (from, from_byte, to, to_byte, coding, encodep, replace) |
5526 | int from, from_byte, to, to_byte, encodep, replace; | |
4ed46869 | 5527 | struct coding_system *coding; |
4ed46869 | 5528 | { |
fb88bf2d | 5529 | int len = to - from, len_byte = to_byte - from_byte; |
72d1a715 | 5530 | int nchars_del = 0, nbytes_del = 0; |
fb88bf2d | 5531 | int require, inserted, inserted_byte; |
4b39528c | 5532 | int head_skip, tail_skip, total_skip = 0; |
84d60297 | 5533 | Lisp_Object saved_coding_symbol; |
fb88bf2d | 5534 | int first = 1; |
fb88bf2d | 5535 | unsigned char *src, *dst; |
84d60297 | 5536 | Lisp_Object deletion; |
e133c8fa | 5537 | int orig_point = PT, orig_len = len; |
6abb9bd9 | 5538 | int prev_Z; |
b73bfc1c KH |
5539 | int multibyte_p = !NILP (current_buffer->enable_multibyte_characters); |
5540 | ||
84d60297 | 5541 | deletion = Qnil; |
8844fa83 | 5542 | saved_coding_symbol = coding->symbol; |
d46c5b12 | 5543 | |
83fa074f | 5544 | if (from < PT && PT < to) |
e133c8fa KH |
5545 | { |
5546 | TEMP_SET_PT_BOTH (from, from_byte); | |
5547 | orig_point = from; | |
5548 | } | |
83fa074f | 5549 | |
6e44253b | 5550 | if (replace) |
d46c5b12 | 5551 | { |
fb88bf2d | 5552 | int saved_from = from; |
e077cc80 | 5553 | int saved_inhibit_modification_hooks; |
fb88bf2d | 5554 | |
d46c5b12 | 5555 | prepare_to_modify_buffer (from, to, &from); |
fb88bf2d KH |
5556 | if (saved_from != from) |
5557 | { | |
5558 | to = from + len; | |
b73bfc1c | 5559 | from_byte = CHAR_TO_BYTE (from), to_byte = CHAR_TO_BYTE (to); |
fb88bf2d KH |
5560 | len_byte = to_byte - from_byte; |
5561 | } | |
e077cc80 KH |
5562 | |
5563 | /* The code conversion routine can not preserve text properties | |
5564 | for now. So, we must remove all text properties in the | |
5565 | region. Here, we must suppress all modification hooks. */ | |
5566 | saved_inhibit_modification_hooks = inhibit_modification_hooks; | |
5567 | inhibit_modification_hooks = 1; | |
5568 | Fset_text_properties (make_number (from), make_number (to), Qnil, Qnil); | |
5569 | inhibit_modification_hooks = saved_inhibit_modification_hooks; | |
d46c5b12 | 5570 | } |
d46c5b12 KH |
5571 | |
5572 | if (! encodep && CODING_REQUIRE_DETECTION (coding)) | |
5573 | { | |
12410ef1 | 5574 | /* We must detect encoding of text and eol format. */ |
d46c5b12 KH |
5575 | |
5576 | if (from < GPT && to > GPT) | |
5577 | move_gap_both (from, from_byte); | |
5578 | if (coding->type == coding_type_undecided) | |
5579 | { | |
fb88bf2d | 5580 | detect_coding (coding, BYTE_POS_ADDR (from_byte), len_byte); |
d46c5b12 | 5581 | if (coding->type == coding_type_undecided) |
62b3ef1d KH |
5582 | { |
5583 | /* It seems that the text contains only ASCII, but we | |
d9aef30f | 5584 | should not leave it undecided because the deeper |
62b3ef1d KH |
5585 | decoding routine (decode_coding) tries to detect the |
5586 | encodings again in vain. */ | |
5587 | coding->type = coding_type_emacs_mule; | |
5588 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
d280ccb6 KH |
5589 | /* As emacs-mule decoder will handle composition, we |
5590 | need this setting to allocate coding->cmp_data | |
5591 | later. */ | |
5592 | coding->composing = COMPOSITION_NO; | |
62b3ef1d | 5593 | } |
d46c5b12 | 5594 | } |
aaaf0b1e KH |
5595 | if (coding->eol_type == CODING_EOL_UNDECIDED |
5596 | && coding->type != coding_type_ccl) | |
d46c5b12 | 5597 | { |
d46c5b12 KH |
5598 | detect_eol (coding, BYTE_POS_ADDR (from_byte), len_byte); |
5599 | if (coding->eol_type == CODING_EOL_UNDECIDED) | |
5600 | coding->eol_type = CODING_EOL_LF; | |
5601 | /* We had better recover the original eol format if we | |
8ca3766a | 5602 | encounter an inconsistent eol format while decoding. */ |
d46c5b12 KH |
5603 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
5604 | } | |
5605 | } | |
5606 | ||
d46c5b12 KH |
5607 | /* Now we convert the text. */ |
5608 | ||
5609 | /* For encoding, we must process pre-write-conversion in advance. */ | |
b73bfc1c KH |
5610 | if (! inhibit_pre_post_conversion |
5611 | && encodep | |
d46c5b12 KH |
5612 | && SYMBOLP (coding->pre_write_conversion) |
5613 | && ! NILP (Ffboundp (coding->pre_write_conversion))) | |
5614 | { | |
2b4f9037 KH |
5615 | /* The function in pre-write-conversion may put a new text in a |
5616 | new buffer. */ | |
0007bdd0 KH |
5617 | struct buffer *prev = current_buffer; |
5618 | Lisp_Object new; | |
d46c5b12 | 5619 | |
1c7457e2 | 5620 | record_unwind_protect (code_convert_region_unwind, |
16ef9c56 | 5621 | Fcons (Vlast_coding_system_used, Qnil)); |
b843d1ae KH |
5622 | /* We should not call any more pre-write/post-read-conversion |
5623 | functions while this pre-write-conversion is running. */ | |
5624 | inhibit_pre_post_conversion = 1; | |
b39f748c AS |
5625 | call2 (coding->pre_write_conversion, |
5626 | make_number (from), make_number (to)); | |
b843d1ae KH |
5627 | inhibit_pre_post_conversion = 0; |
5628 | /* Discard the unwind protect. */ | |
5629 | specpdl_ptr--; | |
5630 | ||
d46c5b12 KH |
5631 | if (current_buffer != prev) |
5632 | { | |
5633 | len = ZV - BEGV; | |
0007bdd0 | 5634 | new = Fcurrent_buffer (); |
d46c5b12 | 5635 | set_buffer_internal_1 (prev); |
7dae4502 | 5636 | del_range_2 (from, from_byte, to, to_byte, 0); |
e133c8fa | 5637 | TEMP_SET_PT_BOTH (from, from_byte); |
0007bdd0 KH |
5638 | insert_from_buffer (XBUFFER (new), 1, len, 0); |
5639 | Fkill_buffer (new); | |
e133c8fa KH |
5640 | if (orig_point >= to) |
5641 | orig_point += len - orig_len; | |
5642 | else if (orig_point > from) | |
5643 | orig_point = from; | |
5644 | orig_len = len; | |
d46c5b12 | 5645 | to = from + len; |
b73bfc1c KH |
5646 | from_byte = CHAR_TO_BYTE (from); |
5647 | to_byte = CHAR_TO_BYTE (to); | |
d46c5b12 | 5648 | len_byte = to_byte - from_byte; |
e133c8fa | 5649 | TEMP_SET_PT_BOTH (from, from_byte); |
d46c5b12 KH |
5650 | } |
5651 | } | |
5652 | ||
12410ef1 | 5653 | if (replace) |
72d1a715 RS |
5654 | { |
5655 | if (! EQ (current_buffer->undo_list, Qt)) | |
5656 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); | |
5657 | else | |
5658 | { | |
5659 | nchars_del = to - from; | |
5660 | nbytes_del = to_byte - from_byte; | |
5661 | } | |
5662 | } | |
12410ef1 | 5663 | |
ec6d2bb8 KH |
5664 | if (coding->composing != COMPOSITION_DISABLED) |
5665 | { | |
5666 | if (encodep) | |
5667 | coding_save_composition (coding, from, to, Fcurrent_buffer ()); | |
5668 | else | |
5669 | coding_allocate_composition_data (coding, from); | |
5670 | } | |
fb88bf2d | 5671 | |
ce559e6f KH |
5672 | /* Try to skip the heading and tailing ASCIIs. We can't skip them |
5673 | if we must run CCL program or there are compositions to | |
5674 | encode. */ | |
5675 | if (coding->type != coding_type_ccl | |
5676 | && (! coding->cmp_data || coding->cmp_data->used == 0)) | |
4956c225 KH |
5677 | { |
5678 | int from_byte_orig = from_byte, to_byte_orig = to_byte; | |
ec6d2bb8 | 5679 | |
4956c225 KH |
5680 | if (from < GPT && GPT < to) |
5681 | move_gap_both (from, from_byte); | |
5682 | SHRINK_CONVERSION_REGION (&from_byte, &to_byte, coding, NULL, encodep); | |
5683 | if (from_byte == to_byte | |
5684 | && (encodep || NILP (coding->post_read_conversion)) | |
5685 | && ! CODING_REQUIRE_FLUSHING (coding)) | |
5686 | { | |
5687 | coding->produced = len_byte; | |
5688 | coding->produced_char = len; | |
5689 | if (!replace) | |
5690 | /* We must record and adjust for this new text now. */ | |
5691 | adjust_after_insert (from, from_byte_orig, to, to_byte_orig, len); | |
ce559e6f | 5692 | coding_free_composition_data (coding); |
4956c225 KH |
5693 | return 0; |
5694 | } | |
5695 | ||
5696 | head_skip = from_byte - from_byte_orig; | |
5697 | tail_skip = to_byte_orig - to_byte; | |
5698 | total_skip = head_skip + tail_skip; | |
5699 | from += head_skip; | |
5700 | to -= tail_skip; | |
5701 | len -= total_skip; len_byte -= total_skip; | |
5702 | } | |
d46c5b12 | 5703 | |
8ca3766a | 5704 | /* For conversion, we must put the gap before the text in addition to |
fb88bf2d KH |
5705 | making the gap larger for efficient decoding. The required gap |
5706 | size starts from 2000 which is the magic number used in make_gap. | |
5707 | But, after one batch of conversion, it will be incremented if we | |
5708 | find that it is not enough . */ | |
d46c5b12 KH |
5709 | require = 2000; |
5710 | ||
5711 | if (GAP_SIZE < require) | |
5712 | make_gap (require - GAP_SIZE); | |
5713 | move_gap_both (from, from_byte); | |
5714 | ||
d46c5b12 | 5715 | inserted = inserted_byte = 0; |
fb88bf2d KH |
5716 | |
5717 | GAP_SIZE += len_byte; | |
5718 | ZV -= len; | |
5719 | Z -= len; | |
5720 | ZV_BYTE -= len_byte; | |
5721 | Z_BYTE -= len_byte; | |
5722 | ||
d9f9a1bc GM |
5723 | if (GPT - BEG < BEG_UNCHANGED) |
5724 | BEG_UNCHANGED = GPT - BEG; | |
5725 | if (Z - GPT < END_UNCHANGED) | |
5726 | END_UNCHANGED = Z - GPT; | |
f2558efd | 5727 | |
b73bfc1c KH |
5728 | if (!encodep && coding->src_multibyte) |
5729 | { | |
5730 | /* Decoding routines expects that the source text is unibyte. | |
5731 | We must convert 8-bit characters of multibyte form to | |
5732 | unibyte. */ | |
5733 | int len_byte_orig = len_byte; | |
5734 | len_byte = str_as_unibyte (GAP_END_ADDR - len_byte, len_byte); | |
5735 | if (len_byte < len_byte_orig) | |
5736 | safe_bcopy (GAP_END_ADDR - len_byte_orig, GAP_END_ADDR - len_byte, | |
5737 | len_byte); | |
5738 | coding->src_multibyte = 0; | |
5739 | } | |
5740 | ||
d46c5b12 KH |
5741 | for (;;) |
5742 | { | |
fb88bf2d | 5743 | int result; |
d46c5b12 | 5744 | |
ec6d2bb8 | 5745 | /* The buffer memory is now: |
b73bfc1c KH |
5746 | +--------+converted-text+---------+-------original-text-------+---+ |
5747 | |<-from->|<--inserted-->|---------|<--------len_byte--------->|---| | |
5748 | |<---------------------- GAP ----------------------->| */ | |
ec6d2bb8 KH |
5749 | src = GAP_END_ADDR - len_byte; |
5750 | dst = GPT_ADDR + inserted_byte; | |
5751 | ||
d46c5b12 | 5752 | if (encodep) |
fb88bf2d | 5753 | result = encode_coding (coding, src, dst, len_byte, 0); |
d46c5b12 | 5754 | else |
0e79d667 RS |
5755 | { |
5756 | if (coding->composing != COMPOSITION_DISABLED) | |
5757 | coding->cmp_data->char_offset = from + inserted; | |
5758 | result = decode_coding (coding, src, dst, len_byte, 0); | |
5759 | } | |
ec6d2bb8 KH |
5760 | |
5761 | /* The buffer memory is now: | |
b73bfc1c KH |
5762 | +--------+-------converted-text----+--+------original-text----+---+ |
5763 | |<-from->|<-inserted->|<-produced->|--|<-(len_byte-consumed)->|---| | |
5764 | |<---------------------- GAP ----------------------->| */ | |
ec6d2bb8 | 5765 | |
d46c5b12 KH |
5766 | inserted += coding->produced_char; |
5767 | inserted_byte += coding->produced; | |
d46c5b12 | 5768 | len_byte -= coding->consumed; |
ec6d2bb8 KH |
5769 | |
5770 | if (result == CODING_FINISH_INSUFFICIENT_CMP) | |
5771 | { | |
5772 | coding_allocate_composition_data (coding, from + inserted); | |
5773 | continue; | |
5774 | } | |
5775 | ||
fb88bf2d | 5776 | src += coding->consumed; |
3636f7a3 | 5777 | dst += coding->produced; |
d46c5b12 | 5778 | |
9864ebce KH |
5779 | if (result == CODING_FINISH_NORMAL) |
5780 | { | |
5781 | src += len_byte; | |
5782 | break; | |
5783 | } | |
d46c5b12 KH |
5784 | if (! encodep && result == CODING_FINISH_INCONSISTENT_EOL) |
5785 | { | |
fb88bf2d | 5786 | unsigned char *pend = dst, *p = pend - inserted_byte; |
38edf7d4 | 5787 | Lisp_Object eol_type; |
d46c5b12 KH |
5788 | |
5789 | /* Encode LFs back to the original eol format (CR or CRLF). */ | |
5790 | if (coding->eol_type == CODING_EOL_CR) | |
5791 | { | |
5792 | while (p < pend) if (*p++ == '\n') p[-1] = '\r'; | |
5793 | } | |
5794 | else | |
5795 | { | |
d46c5b12 KH |
5796 | int count = 0; |
5797 | ||
fb88bf2d KH |
5798 | while (p < pend) if (*p++ == '\n') count++; |
5799 | if (src - dst < count) | |
d46c5b12 | 5800 | { |
38edf7d4 | 5801 | /* We don't have sufficient room for encoding LFs |
fb88bf2d KH |
5802 | back to CRLF. We must record converted and |
5803 | not-yet-converted text back to the buffer | |
5804 | content, enlarge the gap, then record them out of | |
5805 | the buffer contents again. */ | |
5806 | int add = len_byte + inserted_byte; | |
5807 | ||
5808 | GAP_SIZE -= add; | |
5809 | ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
5810 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5811 | make_gap (count - GAP_SIZE); | |
5812 | GAP_SIZE += add; | |
5813 | ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
5814 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
5815 | /* Don't forget to update SRC, DST, and PEND. */ | |
5816 | src = GAP_END_ADDR - len_byte; | |
5817 | dst = GPT_ADDR + inserted_byte; | |
5818 | pend = dst; | |
d46c5b12 | 5819 | } |
d46c5b12 KH |
5820 | inserted += count; |
5821 | inserted_byte += count; | |
fb88bf2d KH |
5822 | coding->produced += count; |
5823 | p = dst = pend + count; | |
5824 | while (count) | |
5825 | { | |
5826 | *--p = *--pend; | |
5827 | if (*p == '\n') count--, *--p = '\r'; | |
5828 | } | |
d46c5b12 KH |
5829 | } |
5830 | ||
5831 | /* Suppress eol-format conversion in the further conversion. */ | |
5832 | coding->eol_type = CODING_EOL_LF; | |
5833 | ||
38edf7d4 KH |
5834 | /* Set the coding system symbol to that for Unix-like EOL. */ |
5835 | eol_type = Fget (saved_coding_symbol, Qeol_type); | |
5836 | if (VECTORP (eol_type) | |
5837 | && XVECTOR (eol_type)->size == 3 | |
5838 | && SYMBOLP (XVECTOR (eol_type)->contents[CODING_EOL_LF])) | |
5839 | coding->symbol = XVECTOR (eol_type)->contents[CODING_EOL_LF]; | |
5840 | else | |
5841 | coding->symbol = saved_coding_symbol; | |
93dec019 | 5842 | |
fb88bf2d | 5843 | continue; |
d46c5b12 KH |
5844 | } |
5845 | if (len_byte <= 0) | |
944bd420 KH |
5846 | { |
5847 | if (coding->type != coding_type_ccl | |
5848 | || coding->mode & CODING_MODE_LAST_BLOCK) | |
5849 | break; | |
5850 | coding->mode |= CODING_MODE_LAST_BLOCK; | |
5851 | continue; | |
5852 | } | |
d46c5b12 KH |
5853 | if (result == CODING_FINISH_INSUFFICIENT_SRC) |
5854 | { | |
5855 | /* The source text ends in invalid codes. Let's just | |
5856 | make them valid buffer contents, and finish conversion. */ | |
70ad9fc4 GM |
5857 | if (multibyte_p) |
5858 | { | |
5859 | unsigned char *start = dst; | |
93dec019 | 5860 | |
70ad9fc4 GM |
5861 | inserted += len_byte; |
5862 | while (len_byte--) | |
5863 | { | |
5864 | int c = *src++; | |
5865 | dst += CHAR_STRING (c, dst); | |
5866 | } | |
5867 | ||
5868 | inserted_byte += dst - start; | |
5869 | } | |
5870 | else | |
5871 | { | |
5872 | inserted += len_byte; | |
5873 | inserted_byte += len_byte; | |
5874 | while (len_byte--) | |
5875 | *dst++ = *src++; | |
5876 | } | |
d46c5b12 KH |
5877 | break; |
5878 | } | |
9864ebce KH |
5879 | if (result == CODING_FINISH_INTERRUPT) |
5880 | { | |
5881 | /* The conversion procedure was interrupted by a user. */ | |
9864ebce KH |
5882 | break; |
5883 | } | |
5884 | /* Now RESULT == CODING_FINISH_INSUFFICIENT_DST */ | |
5885 | if (coding->consumed < 1) | |
5886 | { | |
5887 | /* It's quite strange to require more memory without | |
5888 | consuming any bytes. Perhaps CCL program bug. */ | |
9864ebce KH |
5889 | break; |
5890 | } | |
fb88bf2d KH |
5891 | if (first) |
5892 | { | |
5893 | /* We have just done the first batch of conversion which was | |
8ca3766a | 5894 | stopped because of insufficient gap. Let's reconsider the |
fb88bf2d KH |
5895 | required gap size (i.e. SRT - DST) now. |
5896 | ||
5897 | We have converted ORIG bytes (== coding->consumed) into | |
5898 | NEW bytes (coding->produced). To convert the remaining | |
5899 | LEN bytes, we may need REQUIRE bytes of gap, where: | |
5900 | REQUIRE + LEN_BYTE = LEN_BYTE * (NEW / ORIG) | |
5901 | REQUIRE = LEN_BYTE * (NEW - ORIG) / ORIG | |
5902 | Here, we are sure that NEW >= ORIG. */ | |
b3385c28 KH |
5903 | |
5904 | if (coding->produced <= coding->consumed) | |
5905 | { | |
5906 | /* This happens because of CCL-based coding system with | |
5907 | eol-type CRLF. */ | |
5908 | require = 0; | |
5909 | } | |
5910 | else | |
5911 | { | |
b3ebb2d4 KH |
5912 | float ratio = coding->produced - coding->consumed; |
5913 | ratio /= coding->consumed; | |
b3385c28 KH |
5914 | require = len_byte * ratio; |
5915 | } | |
fb88bf2d KH |
5916 | first = 0; |
5917 | } | |
5918 | if ((src - dst) < (require + 2000)) | |
5919 | { | |
5920 | /* See the comment above the previous call of make_gap. */ | |
5921 | int add = len_byte + inserted_byte; | |
5922 | ||
5923 | GAP_SIZE -= add; | |
5924 | ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
5925 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5926 | make_gap (require + 2000); | |
5927 | GAP_SIZE += add; | |
5928 | ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
5929 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
fb88bf2d | 5930 | } |
d46c5b12 | 5931 | } |
fb88bf2d KH |
5932 | if (src - dst > 0) *dst = 0; /* Put an anchor. */ |
5933 | ||
b73bfc1c KH |
5934 | if (encodep && coding->dst_multibyte) |
5935 | { | |
5936 | /* The output is unibyte. We must convert 8-bit characters to | |
5937 | multibyte form. */ | |
5938 | if (inserted_byte * 2 > GAP_SIZE) | |
5939 | { | |
5940 | GAP_SIZE -= inserted_byte; | |
5941 | ZV += inserted_byte; Z += inserted_byte; | |
5942 | ZV_BYTE += inserted_byte; Z_BYTE += inserted_byte; | |
5943 | GPT += inserted_byte; GPT_BYTE += inserted_byte; | |
5944 | make_gap (inserted_byte - GAP_SIZE); | |
5945 | GAP_SIZE += inserted_byte; | |
5946 | ZV -= inserted_byte; Z -= inserted_byte; | |
5947 | ZV_BYTE -= inserted_byte; Z_BYTE -= inserted_byte; | |
5948 | GPT -= inserted_byte; GPT_BYTE -= inserted_byte; | |
5949 | } | |
5950 | inserted_byte = str_to_multibyte (GPT_ADDR, GAP_SIZE, inserted_byte); | |
5951 | } | |
7553d0e1 | 5952 | |
93dec019 | 5953 | /* If we shrank the conversion area, adjust it now. */ |
12410ef1 KH |
5954 | if (total_skip > 0) |
5955 | { | |
5956 | if (tail_skip > 0) | |
5957 | safe_bcopy (GAP_END_ADDR, GPT_ADDR + inserted_byte, tail_skip); | |
5958 | inserted += total_skip; inserted_byte += total_skip; | |
5959 | GAP_SIZE += total_skip; | |
5960 | GPT -= head_skip; GPT_BYTE -= head_skip; | |
5961 | ZV -= total_skip; ZV_BYTE -= total_skip; | |
5962 | Z -= total_skip; Z_BYTE -= total_skip; | |
5963 | from -= head_skip; from_byte -= head_skip; | |
5964 | to += tail_skip; to_byte += tail_skip; | |
5965 | } | |
5966 | ||
6abb9bd9 | 5967 | prev_Z = Z; |
72d1a715 RS |
5968 | if (! EQ (current_buffer->undo_list, Qt)) |
5969 | adjust_after_replace (from, from_byte, deletion, inserted, inserted_byte); | |
5970 | else | |
5971 | adjust_after_replace_noundo (from, from_byte, nchars_del, nbytes_del, | |
5972 | inserted, inserted_byte); | |
6abb9bd9 | 5973 | inserted = Z - prev_Z; |
4ed46869 | 5974 | |
ec6d2bb8 KH |
5975 | if (!encodep && coding->cmp_data && coding->cmp_data->used) |
5976 | coding_restore_composition (coding, Fcurrent_buffer ()); | |
5977 | coding_free_composition_data (coding); | |
5978 | ||
b73bfc1c KH |
5979 | if (! inhibit_pre_post_conversion |
5980 | && ! encodep && ! NILP (coding->post_read_conversion)) | |
d46c5b12 | 5981 | { |
2b4f9037 | 5982 | Lisp_Object val; |
1c7457e2 | 5983 | Lisp_Object saved_coding_system; |
4ed46869 | 5984 | |
e133c8fa KH |
5985 | if (from != PT) |
5986 | TEMP_SET_PT_BOTH (from, from_byte); | |
6abb9bd9 | 5987 | prev_Z = Z; |
1c7457e2 | 5988 | record_unwind_protect (code_convert_region_unwind, |
16ef9c56 | 5989 | Fcons (Vlast_coding_system_used, Qnil)); |
1c7457e2 KH |
5990 | saved_coding_system = Vlast_coding_system_used; |
5991 | Vlast_coding_system_used = coding->symbol; | |
b843d1ae KH |
5992 | /* We should not call any more pre-write/post-read-conversion |
5993 | functions while this post-read-conversion is running. */ | |
5994 | inhibit_pre_post_conversion = 1; | |
2b4f9037 | 5995 | val = call1 (coding->post_read_conversion, make_number (inserted)); |
b843d1ae | 5996 | inhibit_pre_post_conversion = 0; |
1c7457e2 KH |
5997 | coding->symbol = Vlast_coding_system_used; |
5998 | Vlast_coding_system_used = saved_coding_system; | |
b843d1ae KH |
5999 | /* Discard the unwind protect. */ |
6000 | specpdl_ptr--; | |
b7826503 | 6001 | CHECK_NUMBER (val); |
944bd420 | 6002 | inserted += Z - prev_Z; |
e133c8fa KH |
6003 | } |
6004 | ||
6005 | if (orig_point >= from) | |
6006 | { | |
6007 | if (orig_point >= from + orig_len) | |
6008 | orig_point += inserted - orig_len; | |
6009 | else | |
6010 | orig_point = from; | |
6011 | TEMP_SET_PT (orig_point); | |
d46c5b12 | 6012 | } |
4ed46869 | 6013 | |
ec6d2bb8 KH |
6014 | if (replace) |
6015 | { | |
6016 | signal_after_change (from, to - from, inserted); | |
e19539f1 | 6017 | update_compositions (from, from + inserted, CHECK_BORDER); |
ec6d2bb8 | 6018 | } |
2b4f9037 | 6019 | |
fb88bf2d | 6020 | { |
12410ef1 KH |
6021 | coding->consumed = to_byte - from_byte; |
6022 | coding->consumed_char = to - from; | |
6023 | coding->produced = inserted_byte; | |
6024 | coding->produced_char = inserted; | |
fb88bf2d | 6025 | } |
7553d0e1 | 6026 | |
fb88bf2d | 6027 | return 0; |
d46c5b12 KH |
6028 | } |
6029 | ||
2a47931b KH |
6030 | /* Name (or base name) of work buffer for code conversion. */ |
6031 | static Lisp_Object Vcode_conversion_workbuf_name; | |
6032 | ||
6033 | /* Set the current buffer to the working buffer prepared for | |
6034 | code-conversion. MULTIBYTE specifies the multibyteness of the | |
16ef9c56 KH |
6035 | buffer. Return the buffer we set if it must be killed after use. |
6036 | Otherwise return Qnil. */ | |
2a47931b | 6037 | |
16ef9c56 | 6038 | static Lisp_Object |
2a47931b KH |
6039 | set_conversion_work_buffer (multibyte) |
6040 | int multibyte; | |
6041 | { | |
16ef9c56 | 6042 | Lisp_Object buffer, buffer_to_kill; |
2a47931b KH |
6043 | struct buffer *buf; |
6044 | ||
6045 | buffer = Fget_buffer_create (Vcode_conversion_workbuf_name); | |
6046 | buf = XBUFFER (buffer); | |
16ef9c56 KH |
6047 | if (buf == current_buffer) |
6048 | { | |
6049 | /* As we are already in the work buffer, we must generate a new | |
6050 | buffer for the work. */ | |
6051 | Lisp_Object name; | |
6052 | ||
6053 | name = Fgenerate_new_buffer_name (Vcode_conversion_workbuf_name, Qnil); | |
6054 | buffer = buffer_to_kill = Fget_buffer_create (name); | |
6055 | buf = XBUFFER (buffer); | |
6056 | } | |
6057 | else | |
6058 | buffer_to_kill = Qnil; | |
6059 | ||
2a47931b KH |
6060 | delete_all_overlays (buf); |
6061 | buf->directory = current_buffer->directory; | |
6062 | buf->read_only = Qnil; | |
6063 | buf->filename = Qnil; | |
6064 | buf->undo_list = Qt; | |
6065 | eassert (buf->overlays_before == NULL); | |
6066 | eassert (buf->overlays_after == NULL); | |
6067 | set_buffer_internal (buf); | |
6068 | if (BEG != BEGV || Z != ZV) | |
6069 | Fwiden (); | |
6070 | del_range_2 (BEG, BEG_BYTE, Z, Z_BYTE, 0); | |
6071 | buf->enable_multibyte_characters = multibyte ? Qt : Qnil; | |
16ef9c56 | 6072 | return buffer_to_kill; |
2a47931b KH |
6073 | } |
6074 | ||
d46c5b12 | 6075 | Lisp_Object |
b73bfc1c KH |
6076 | run_pre_post_conversion_on_str (str, coding, encodep) |
6077 | Lisp_Object str; | |
6078 | struct coding_system *coding; | |
6079 | int encodep; | |
6080 | { | |
aed13378 | 6081 | int count = SPECPDL_INDEX (); |
cf3b32fc | 6082 | struct gcpro gcpro1, gcpro2; |
b73bfc1c | 6083 | int multibyte = STRING_MULTIBYTE (str); |
cf3b32fc | 6084 | Lisp_Object old_deactivate_mark; |
16ef9c56 | 6085 | Lisp_Object buffer_to_kill; |
24a2b282 | 6086 | Lisp_Object unwind_arg; |
b73bfc1c KH |
6087 | |
6088 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
cf3b32fc RS |
6089 | /* It is not crucial to specbind this. */ |
6090 | old_deactivate_mark = Vdeactivate_mark; | |
6091 | GCPRO2 (str, old_deactivate_mark); | |
3fd9494b | 6092 | |
b73bfc1c KH |
6093 | /* We must insert the contents of STR as is without |
6094 | unibyte<->multibyte conversion. For that, we adjust the | |
6095 | multibyteness of the working buffer to that of STR. */ | |
16ef9c56 | 6096 | buffer_to_kill = set_conversion_work_buffer (multibyte); |
24a2b282 KH |
6097 | if (NILP (buffer_to_kill)) |
6098 | unwind_arg = Fcons (Vlast_coding_system_used, Qnil); | |
6099 | else | |
6100 | unwind_arg = list2 (Vlast_coding_system_used, buffer_to_kill); | |
6101 | record_unwind_protect (code_convert_region_unwind, unwind_arg); | |
3fd9494b | 6102 | |
b73bfc1c | 6103 | insert_from_string (str, 0, 0, |
d5db4077 | 6104 | SCHARS (str), SBYTES (str), 0); |
b73bfc1c KH |
6105 | UNGCPRO; |
6106 | inhibit_pre_post_conversion = 1; | |
6107 | if (encodep) | |
24a2b282 KH |
6108 | { |
6109 | struct buffer *prev = current_buffer; | |
6110 | ||
6111 | call2 (coding->pre_write_conversion, make_number (BEG), make_number (Z)); | |
6112 | if (prev != current_buffer) | |
6113 | /* We must kill the current buffer too. */ | |
6114 | Fsetcdr (unwind_arg, Fcons (Fcurrent_buffer (), XCDR (unwind_arg))); | |
6115 | } | |
b73bfc1c | 6116 | else |
6bac5b12 | 6117 | { |
1c7457e2 | 6118 | Vlast_coding_system_used = coding->symbol; |
6bac5b12 KH |
6119 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
6120 | call1 (coding->post_read_conversion, make_number (Z - BEG)); | |
1c7457e2 | 6121 | coding->symbol = Vlast_coding_system_used; |
6bac5b12 | 6122 | } |
b73bfc1c | 6123 | inhibit_pre_post_conversion = 0; |
cf3b32fc | 6124 | Vdeactivate_mark = old_deactivate_mark; |
78108bcd | 6125 | str = make_buffer_string (BEG, Z, 1); |
b73bfc1c KH |
6126 | return unbind_to (count, str); |
6127 | } | |
6128 | ||
2a47931b KH |
6129 | |
6130 | /* Run pre-write-conversion function of CODING on NCHARS/NBYTES | |
6131 | text in *STR. *SIZE is the allocated bytes for STR. As it | |
6132 | is intended that this function is called from encode_terminal_code, | |
6133 | the pre-write-conversion function is run by safe_call and thus | |
6134 | "Error during redisplay: ..." is logged when an error occurs. | |
6135 | ||
6136 | Store the resulting text in *STR and set CODING->produced_char and | |
6137 | CODING->produced to the number of characters and bytes | |
6138 | respectively. If the size of *STR is too small, enlarge it by | |
6139 | xrealloc and update *STR and *SIZE. */ | |
6140 | ||
6141 | void | |
6142 | run_pre_write_conversin_on_c_str (str, size, nchars, nbytes, coding) | |
6143 | unsigned char **str; | |
6144 | int *size, nchars, nbytes; | |
6145 | struct coding_system *coding; | |
6146 | { | |
6147 | struct gcpro gcpro1, gcpro2; | |
6148 | struct buffer *cur = current_buffer; | |
24a2b282 | 6149 | struct buffer *prev; |
2a47931b KH |
6150 | Lisp_Object old_deactivate_mark, old_last_coding_system_used; |
6151 | Lisp_Object args[3]; | |
16ef9c56 | 6152 | Lisp_Object buffer_to_kill; |
2a47931b KH |
6153 | |
6154 | /* It is not crucial to specbind this. */ | |
6155 | old_deactivate_mark = Vdeactivate_mark; | |
6156 | old_last_coding_system_used = Vlast_coding_system_used; | |
6157 | GCPRO2 (old_deactivate_mark, old_last_coding_system_used); | |
6158 | ||
6159 | /* We must insert the contents of STR as is without | |
6160 | unibyte<->multibyte conversion. For that, we adjust the | |
6161 | multibyteness of the working buffer to that of STR. */ | |
16ef9c56 | 6162 | buffer_to_kill = set_conversion_work_buffer (coding->src_multibyte); |
2a47931b KH |
6163 | insert_1_both (*str, nchars, nbytes, 0, 0, 0); |
6164 | UNGCPRO; | |
6165 | inhibit_pre_post_conversion = 1; | |
24a2b282 | 6166 | prev = current_buffer; |
2a47931b KH |
6167 | args[0] = coding->pre_write_conversion; |
6168 | args[1] = make_number (BEG); | |
6169 | args[2] = make_number (Z); | |
6170 | safe_call (3, args); | |
6171 | inhibit_pre_post_conversion = 0; | |
6172 | Vdeactivate_mark = old_deactivate_mark; | |
6173 | Vlast_coding_system_used = old_last_coding_system_used; | |
6174 | coding->produced_char = Z - BEG; | |
6175 | coding->produced = Z_BYTE - BEG_BYTE; | |
6176 | if (coding->produced > *size) | |
6177 | { | |
6178 | *size = coding->produced; | |
6179 | *str = xrealloc (*str, *size); | |
6180 | } | |
6181 | if (BEG < GPT && GPT < Z) | |
6182 | move_gap (BEG); | |
6183 | bcopy (BEG_ADDR, *str, coding->produced); | |
6184 | coding->src_multibyte | |
6185 | = ! NILP (current_buffer->enable_multibyte_characters); | |
24a2b282 KH |
6186 | if (prev != current_buffer) |
6187 | Fkill_buffer (Fcurrent_buffer ()); | |
2a47931b | 6188 | set_buffer_internal (cur); |
16ef9c56 KH |
6189 | if (! NILP (buffer_to_kill)) |
6190 | Fkill_buffer (buffer_to_kill); | |
2a47931b KH |
6191 | } |
6192 | ||
6193 | ||
b73bfc1c KH |
6194 | Lisp_Object |
6195 | decode_coding_string (str, coding, nocopy) | |
d46c5b12 | 6196 | Lisp_Object str; |
4ed46869 | 6197 | struct coding_system *coding; |
b73bfc1c | 6198 | int nocopy; |
4ed46869 | 6199 | { |
d46c5b12 | 6200 | int len; |
73be902c | 6201 | struct conversion_buffer buf; |
da55a2b7 | 6202 | int from, to_byte; |
84d60297 | 6203 | Lisp_Object saved_coding_symbol; |
d46c5b12 | 6204 | int result; |
78108bcd | 6205 | int require_decoding; |
73be902c KH |
6206 | int shrinked_bytes = 0; |
6207 | Lisp_Object newstr; | |
2391eaa4 | 6208 | int consumed, consumed_char, produced, produced_char; |
4ed46869 | 6209 | |
b73bfc1c | 6210 | from = 0; |
d5db4077 | 6211 | to_byte = SBYTES (str); |
4ed46869 | 6212 | |
8844fa83 | 6213 | saved_coding_symbol = coding->symbol; |
764ca8da KH |
6214 | coding->src_multibyte = STRING_MULTIBYTE (str); |
6215 | coding->dst_multibyte = 1; | |
b73bfc1c | 6216 | if (CODING_REQUIRE_DETECTION (coding)) |
d46c5b12 KH |
6217 | { |
6218 | /* See the comments in code_convert_region. */ | |
6219 | if (coding->type == coding_type_undecided) | |
6220 | { | |
d5db4077 | 6221 | detect_coding (coding, SDATA (str), to_byte); |
d46c5b12 | 6222 | if (coding->type == coding_type_undecided) |
d280ccb6 KH |
6223 | { |
6224 | coding->type = coding_type_emacs_mule; | |
6225 | coding->category_idx = CODING_CATEGORY_IDX_EMACS_MULE; | |
6226 | /* As emacs-mule decoder will handle composition, we | |
6227 | need this setting to allocate coding->cmp_data | |
6228 | later. */ | |
6229 | coding->composing = COMPOSITION_NO; | |
6230 | } | |
d46c5b12 | 6231 | } |
aaaf0b1e KH |
6232 | if (coding->eol_type == CODING_EOL_UNDECIDED |
6233 | && coding->type != coding_type_ccl) | |
d46c5b12 KH |
6234 | { |
6235 | saved_coding_symbol = coding->symbol; | |
d5db4077 | 6236 | detect_eol (coding, SDATA (str), to_byte); |
d46c5b12 KH |
6237 | if (coding->eol_type == CODING_EOL_UNDECIDED) |
6238 | coding->eol_type = CODING_EOL_LF; | |
6239 | /* We had better recover the original eol format if we | |
8ca3766a | 6240 | encounter an inconsistent eol format while decoding. */ |
d46c5b12 KH |
6241 | coding->mode |= CODING_MODE_INHIBIT_INCONSISTENT_EOL; |
6242 | } | |
6243 | } | |
4ed46869 | 6244 | |
764ca8da KH |
6245 | if (coding->type == coding_type_no_conversion |
6246 | || coding->type == coding_type_raw_text) | |
6247 | coding->dst_multibyte = 0; | |
6248 | ||
78108bcd | 6249 | require_decoding = CODING_REQUIRE_DECODING (coding); |
ec6d2bb8 | 6250 | |
b73bfc1c | 6251 | if (STRING_MULTIBYTE (str)) |
d46c5b12 | 6252 | { |
b73bfc1c KH |
6253 | /* Decoding routines expect the source text to be unibyte. */ |
6254 | str = Fstring_as_unibyte (str); | |
d5db4077 | 6255 | to_byte = SBYTES (str); |
b73bfc1c | 6256 | nocopy = 1; |
764ca8da | 6257 | coding->src_multibyte = 0; |
b73bfc1c | 6258 | } |
ec6d2bb8 | 6259 | |
b73bfc1c | 6260 | /* Try to skip the heading and tailing ASCIIs. */ |
78108bcd | 6261 | if (require_decoding && coding->type != coding_type_ccl) |
4956c225 | 6262 | { |
d5db4077 | 6263 | SHRINK_CONVERSION_REGION (&from, &to_byte, coding, SDATA (str), |
4956c225 KH |
6264 | 0); |
6265 | if (from == to_byte) | |
78108bcd | 6266 | require_decoding = 0; |
d5db4077 | 6267 | shrinked_bytes = from + (SBYTES (str) - to_byte); |
4956c225 | 6268 | } |
b73bfc1c | 6269 | |
439ad9ea KH |
6270 | if (!require_decoding |
6271 | && !(SYMBOLP (coding->post_read_conversion) | |
6272 | && !NILP (Ffboundp (coding->post_read_conversion)))) | |
78108bcd | 6273 | { |
d5db4077 KR |
6274 | coding->consumed = SBYTES (str); |
6275 | coding->consumed_char = SCHARS (str); | |
78108bcd KH |
6276 | if (coding->dst_multibyte) |
6277 | { | |
6278 | str = Fstring_as_multibyte (str); | |
6279 | nocopy = 1; | |
6280 | } | |
d5db4077 KR |
6281 | coding->produced = SBYTES (str); |
6282 | coding->produced_char = SCHARS (str); | |
78108bcd KH |
6283 | return (nocopy ? str : Fcopy_sequence (str)); |
6284 | } | |
6285 | ||
6286 | if (coding->composing != COMPOSITION_DISABLED) | |
6287 | coding_allocate_composition_data (coding, from); | |
b73bfc1c | 6288 | len = decoding_buffer_size (coding, to_byte - from); |
73be902c | 6289 | allocate_conversion_buffer (buf, len); |
4ed46869 | 6290 | |
2391eaa4 | 6291 | consumed = consumed_char = produced = produced_char = 0; |
73be902c | 6292 | while (1) |
4ed46869 | 6293 | { |
d5db4077 | 6294 | result = decode_coding (coding, SDATA (str) + from + consumed, |
73be902c KH |
6295 | buf.data + produced, to_byte - from - consumed, |
6296 | buf.size - produced); | |
6297 | consumed += coding->consumed; | |
2391eaa4 | 6298 | consumed_char += coding->consumed_char; |
73be902c KH |
6299 | produced += coding->produced; |
6300 | produced_char += coding->produced_char; | |
2391eaa4 | 6301 | if (result == CODING_FINISH_NORMAL |
c3912f23 | 6302 | || result == CODING_FINISH_INTERRUPT |
2391eaa4 KH |
6303 | || (result == CODING_FINISH_INSUFFICIENT_SRC |
6304 | && coding->consumed == 0)) | |
73be902c KH |
6305 | break; |
6306 | if (result == CODING_FINISH_INSUFFICIENT_CMP) | |
6307 | coding_allocate_composition_data (coding, from + produced_char); | |
6308 | else if (result == CODING_FINISH_INSUFFICIENT_DST) | |
6309 | extend_conversion_buffer (&buf); | |
6310 | else if (result == CODING_FINISH_INCONSISTENT_EOL) | |
6311 | { | |
8844fa83 KH |
6312 | Lisp_Object eol_type; |
6313 | ||
73be902c KH |
6314 | /* Recover the original EOL format. */ |
6315 | if (coding->eol_type == CODING_EOL_CR) | |
6316 | { | |
6317 | unsigned char *p; | |
6318 | for (p = buf.data; p < buf.data + produced; p++) | |
6319 | if (*p == '\n') *p = '\r'; | |
6320 | } | |
6321 | else if (coding->eol_type == CODING_EOL_CRLF) | |
6322 | { | |
6323 | int num_eol = 0; | |
6324 | unsigned char *p0, *p1; | |
6325 | for (p0 = buf.data, p1 = p0 + produced; p0 < p1; p0++) | |
6326 | if (*p0 == '\n') num_eol++; | |
6327 | if (produced + num_eol >= buf.size) | |
6328 | extend_conversion_buffer (&buf); | |
6329 | for (p0 = buf.data + produced, p1 = p0 + num_eol; p0 > buf.data;) | |
6330 | { | |
6331 | *--p1 = *--p0; | |
6332 | if (*p0 == '\n') *--p1 = '\r'; | |
6333 | } | |
6334 | produced += num_eol; | |
6335 | produced_char += num_eol; | |
93dec019 | 6336 | } |
8844fa83 | 6337 | /* Suppress eol-format conversion in the further conversion. */ |
73be902c | 6338 | coding->eol_type = CODING_EOL_LF; |
8844fa83 KH |
6339 | |
6340 | /* Set the coding system symbol to that for Unix-like EOL. */ | |
6341 | eol_type = Fget (saved_coding_symbol, Qeol_type); | |
6342 | if (VECTORP (eol_type) | |
6343 | && XVECTOR (eol_type)->size == 3 | |
6344 | && SYMBOLP (XVECTOR (eol_type)->contents[CODING_EOL_LF])) | |
6345 | coding->symbol = XVECTOR (eol_type)->contents[CODING_EOL_LF]; | |
6346 | else | |
6347 | coding->symbol = saved_coding_symbol; | |
6348 | ||
6349 | ||
73be902c | 6350 | } |
4ed46869 | 6351 | } |
d46c5b12 | 6352 | |
2391eaa4 KH |
6353 | coding->consumed = consumed; |
6354 | coding->consumed_char = consumed_char; | |
6355 | coding->produced = produced; | |
6356 | coding->produced_char = produced_char; | |
6357 | ||
78108bcd | 6358 | if (coding->dst_multibyte) |
73be902c KH |
6359 | newstr = make_uninit_multibyte_string (produced_char + shrinked_bytes, |
6360 | produced + shrinked_bytes); | |
78108bcd | 6361 | else |
73be902c KH |
6362 | newstr = make_uninit_string (produced + shrinked_bytes); |
6363 | if (from > 0) | |
a4244313 KR |
6364 | STRING_COPYIN (newstr, 0, SDATA (str), from); |
6365 | STRING_COPYIN (newstr, from, buf.data, produced); | |
73be902c | 6366 | if (shrinked_bytes > from) |
a4244313 KR |
6367 | STRING_COPYIN (newstr, from + produced, |
6368 | SDATA (str) + to_byte, | |
6369 | shrinked_bytes - from); | |
73be902c | 6370 | free_conversion_buffer (&buf); |
b73bfc1c | 6371 | |
160a708c KH |
6372 | coding->consumed += shrinked_bytes; |
6373 | coding->consumed_char += shrinked_bytes; | |
6374 | coding->produced += shrinked_bytes; | |
6375 | coding->produced_char += shrinked_bytes; | |
6376 | ||
b73bfc1c | 6377 | if (coding->cmp_data && coding->cmp_data->used) |
73be902c | 6378 | coding_restore_composition (coding, newstr); |
b73bfc1c KH |
6379 | coding_free_composition_data (coding); |
6380 | ||
6381 | if (SYMBOLP (coding->post_read_conversion) | |
6382 | && !NILP (Ffboundp (coding->post_read_conversion))) | |
73be902c | 6383 | newstr = run_pre_post_conversion_on_str (newstr, coding, 0); |
b73bfc1c | 6384 | |
73be902c | 6385 | return newstr; |
b73bfc1c KH |
6386 | } |
6387 | ||
6388 | Lisp_Object | |
6389 | encode_coding_string (str, coding, nocopy) | |
6390 | Lisp_Object str; | |
6391 | struct coding_system *coding; | |
6392 | int nocopy; | |
6393 | { | |
6394 | int len; | |
73be902c | 6395 | struct conversion_buffer buf; |
b73bfc1c | 6396 | int from, to, to_byte; |
b73bfc1c | 6397 | int result; |
73be902c KH |
6398 | int shrinked_bytes = 0; |
6399 | Lisp_Object newstr; | |
2391eaa4 | 6400 | int consumed, consumed_char, produced, produced_char; |
b73bfc1c KH |
6401 | |
6402 | if (SYMBOLP (coding->pre_write_conversion) | |
6403 | && !NILP (Ffboundp (coding->pre_write_conversion))) | |
3bb917bf KH |
6404 | { |
6405 | str = run_pre_post_conversion_on_str (str, coding, 1); | |
6406 | /* As STR is just newly generated, we don't have to copy it | |
6407 | anymore. */ | |
6408 | nocopy = 1; | |
6409 | } | |
b73bfc1c KH |
6410 | |
6411 | from = 0; | |
d5db4077 KR |
6412 | to = SCHARS (str); |
6413 | to_byte = SBYTES (str); | |
b73bfc1c | 6414 | |
e2c06b17 KH |
6415 | /* Encoding routines determine the multibyteness of the source text |
6416 | by coding->src_multibyte. */ | |
3bb917bf | 6417 | coding->src_multibyte = SCHARS (str) < SBYTES (str); |
e2c06b17 | 6418 | coding->dst_multibyte = 0; |
b73bfc1c | 6419 | if (! CODING_REQUIRE_ENCODING (coding)) |
3bb917bf | 6420 | goto no_need_of_encoding; |
826bfb8b | 6421 | |
b73bfc1c KH |
6422 | if (coding->composing != COMPOSITION_DISABLED) |
6423 | coding_save_composition (coding, from, to, str); | |
ec6d2bb8 | 6424 | |
ce559e6f KH |
6425 | /* Try to skip the heading and tailing ASCIIs. We can't skip them |
6426 | if we must run CCL program or there are compositions to | |
6427 | encode. */ | |
6428 | if (coding->type != coding_type_ccl | |
6429 | && (! coding->cmp_data || coding->cmp_data->used == 0)) | |
4956c225 | 6430 | { |
d5db4077 | 6431 | SHRINK_CONVERSION_REGION (&from, &to_byte, coding, SDATA (str), |
4956c225 KH |
6432 | 1); |
6433 | if (from == to_byte) | |
ce559e6f KH |
6434 | { |
6435 | coding_free_composition_data (coding); | |
3bb917bf | 6436 | goto no_need_of_encoding; |
ce559e6f | 6437 | } |
d5db4077 | 6438 | shrinked_bytes = from + (SBYTES (str) - to_byte); |
4956c225 | 6439 | } |
b73bfc1c KH |
6440 | |
6441 | len = encoding_buffer_size (coding, to_byte - from); | |
73be902c KH |
6442 | allocate_conversion_buffer (buf, len); |
6443 | ||
2391eaa4 | 6444 | consumed = consumed_char = produced = produced_char = 0; |
73be902c KH |
6445 | while (1) |
6446 | { | |
d5db4077 | 6447 | result = encode_coding (coding, SDATA (str) + from + consumed, |
73be902c KH |
6448 | buf.data + produced, to_byte - from - consumed, |
6449 | buf.size - produced); | |
6450 | consumed += coding->consumed; | |
2391eaa4 | 6451 | consumed_char += coding->consumed_char; |
13004bef | 6452 | produced += coding->produced; |
2391eaa4 KH |
6453 | produced_char += coding->produced_char; |
6454 | if (result == CODING_FINISH_NORMAL | |
230779b9 | 6455 | || result == CODING_FINISH_INTERRUPT |
2391eaa4 KH |
6456 | || (result == CODING_FINISH_INSUFFICIENT_SRC |
6457 | && coding->consumed == 0)) | |
73be902c KH |
6458 | break; |
6459 | /* Now result should be CODING_FINISH_INSUFFICIENT_DST. */ | |
6460 | extend_conversion_buffer (&buf); | |
6461 | } | |
6462 | ||
2391eaa4 KH |
6463 | coding->consumed = consumed; |
6464 | coding->consumed_char = consumed_char; | |
6465 | coding->produced = produced; | |
6466 | coding->produced_char = produced_char; | |
6467 | ||
73be902c | 6468 | newstr = make_uninit_string (produced + shrinked_bytes); |
b73bfc1c | 6469 | if (from > 0) |
a4244313 KR |
6470 | STRING_COPYIN (newstr, 0, SDATA (str), from); |
6471 | STRING_COPYIN (newstr, from, buf.data, produced); | |
73be902c | 6472 | if (shrinked_bytes > from) |
a4244313 KR |
6473 | STRING_COPYIN (newstr, from + produced, |
6474 | SDATA (str) + to_byte, | |
6475 | shrinked_bytes - from); | |
73be902c KH |
6476 | |
6477 | free_conversion_buffer (&buf); | |
ec6d2bb8 | 6478 | coding_free_composition_data (coding); |
b73bfc1c | 6479 | |
73be902c | 6480 | return newstr; |
3bb917bf KH |
6481 | |
6482 | no_need_of_encoding: | |
6483 | coding->consumed = SBYTES (str); | |
6484 | coding->consumed_char = SCHARS (str); | |
6485 | if (STRING_MULTIBYTE (str)) | |
6486 | { | |
6487 | if (nocopy) | |
6488 | /* We are sure that STR doesn't contain a multibyte | |
6489 | character. */ | |
6490 | STRING_SET_UNIBYTE (str); | |
6491 | else | |
6492 | { | |
6493 | str = Fstring_as_unibyte (str); | |
6494 | nocopy = 1; | |
6495 | } | |
6496 | } | |
6497 | coding->produced = SBYTES (str); | |
6498 | coding->produced_char = SCHARS (str); | |
6499 | return (nocopy ? str : Fcopy_sequence (str)); | |
4ed46869 KH |
6500 | } |
6501 | ||
6502 | \f | |
6503 | #ifdef emacs | |
1397dc18 | 6504 | /*** 8. Emacs Lisp library functions ***/ |
4ed46869 | 6505 | |
4ed46869 | 6506 | DEFUN ("coding-system-p", Fcoding_system_p, Scoding_system_p, 1, 1, 0, |
48b0f3ae PJ |
6507 | doc: /* Return t if OBJECT is nil or a coding-system. |
6508 | See the documentation of `make-coding-system' for information | |
6509 | about coding-system objects. */) | |
6510 | (obj) | |
4ed46869 KH |
6511 | Lisp_Object obj; |
6512 | { | |
4608c386 KH |
6513 | if (NILP (obj)) |
6514 | return Qt; | |
6515 | if (!SYMBOLP (obj)) | |
6516 | return Qnil; | |
c2164d91 KH |
6517 | if (! NILP (Fget (obj, Qcoding_system_define_form))) |
6518 | return Qt; | |
4608c386 KH |
6519 | /* Get coding-spec vector for OBJ. */ |
6520 | obj = Fget (obj, Qcoding_system); | |
6521 | return ((VECTORP (obj) && XVECTOR (obj)->size == 5) | |
6522 | ? Qt : Qnil); | |
4ed46869 KH |
6523 | } |
6524 | ||
9d991de8 RS |
6525 | DEFUN ("read-non-nil-coding-system", Fread_non_nil_coding_system, |
6526 | Sread_non_nil_coding_system, 1, 1, 0, | |
48b0f3ae PJ |
6527 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. */) |
6528 | (prompt) | |
4ed46869 KH |
6529 | Lisp_Object prompt; |
6530 | { | |
e0e989f6 | 6531 | Lisp_Object val; |
9d991de8 RS |
6532 | do |
6533 | { | |
4608c386 KH |
6534 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
6535 | Qt, Qnil, Qcoding_system_history, Qnil, Qnil); | |
9d991de8 | 6536 | } |
d5db4077 | 6537 | while (SCHARS (val) == 0); |
e0e989f6 | 6538 | return (Fintern (val, Qnil)); |
4ed46869 KH |
6539 | } |
6540 | ||
9b787f3e | 6541 | DEFUN ("read-coding-system", Fread_coding_system, Sread_coding_system, 1, 2, 0, |
48b0f3ae PJ |
6542 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. |
6543 | If the user enters null input, return second argument DEFAULT-CODING-SYSTEM. */) | |
6544 | (prompt, default_coding_system) | |
9b787f3e | 6545 | Lisp_Object prompt, default_coding_system; |
4ed46869 | 6546 | { |
f44d27ce | 6547 | Lisp_Object val; |
9b787f3e | 6548 | if (SYMBOLP (default_coding_system)) |
57d25e6f | 6549 | default_coding_system = SYMBOL_NAME (default_coding_system); |
4608c386 | 6550 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
9b787f3e RS |
6551 | Qt, Qnil, Qcoding_system_history, |
6552 | default_coding_system, Qnil); | |
d5db4077 | 6553 | return (SCHARS (val) == 0 ? Qnil : Fintern (val, Qnil)); |
4ed46869 KH |
6554 | } |
6555 | ||
6556 | DEFUN ("check-coding-system", Fcheck_coding_system, Scheck_coding_system, | |
6557 | 1, 1, 0, | |
48b0f3ae PJ |
6558 | doc: /* Check validity of CODING-SYSTEM. |
6559 | If valid, return CODING-SYSTEM, else signal a `coding-system-error' error. | |
303cdc2d | 6560 | It is valid if it is nil or a symbol with a non-nil `coding-system' property. |
de1d1a40 | 6561 | The value of this property should be a vector of length 5. */) |
48b0f3ae | 6562 | (coding_system) |
4ed46869 KH |
6563 | Lisp_Object coding_system; |
6564 | { | |
a362520d KH |
6565 | Lisp_Object define_form; |
6566 | ||
6567 | define_form = Fget (coding_system, Qcoding_system_define_form); | |
6568 | if (! NILP (define_form)) | |
6569 | { | |
6570 | Fput (coding_system, Qcoding_system_define_form, Qnil); | |
6571 | safe_eval (define_form); | |
6572 | } | |
4ed46869 KH |
6573 | if (!NILP (Fcoding_system_p (coding_system))) |
6574 | return coding_system; | |
6575 | while (1) | |
02ba4723 | 6576 | Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil)); |
4ed46869 | 6577 | } |
3a73fa5d | 6578 | \f |
d46c5b12 | 6579 | Lisp_Object |
0a28aafb | 6580 | detect_coding_system (src, src_bytes, highest, multibytep) |
a4244313 | 6581 | const unsigned char *src; |
d46c5b12 | 6582 | int src_bytes, highest; |
0a28aafb | 6583 | int multibytep; |
4ed46869 KH |
6584 | { |
6585 | int coding_mask, eol_type; | |
d46c5b12 KH |
6586 | Lisp_Object val, tmp; |
6587 | int dummy; | |
4ed46869 | 6588 | |
0a28aafb | 6589 | coding_mask = detect_coding_mask (src, src_bytes, NULL, &dummy, multibytep); |
d46c5b12 KH |
6590 | eol_type = detect_eol_type (src, src_bytes, &dummy); |
6591 | if (eol_type == CODING_EOL_INCONSISTENT) | |
25b02698 | 6592 | eol_type = CODING_EOL_UNDECIDED; |
4ed46869 | 6593 | |
d46c5b12 | 6594 | if (!coding_mask) |
4ed46869 | 6595 | { |
27901516 | 6596 | val = Qundecided; |
d46c5b12 | 6597 | if (eol_type != CODING_EOL_UNDECIDED) |
4ed46869 | 6598 | { |
f44d27ce RS |
6599 | Lisp_Object val2; |
6600 | val2 = Fget (Qundecided, Qeol_type); | |
4ed46869 KH |
6601 | if (VECTORP (val2)) |
6602 | val = XVECTOR (val2)->contents[eol_type]; | |
6603 | } | |
80e803b4 | 6604 | return (highest ? val : Fcons (val, Qnil)); |
4ed46869 | 6605 | } |
4ed46869 | 6606 | |
d46c5b12 KH |
6607 | /* At first, gather possible coding systems in VAL. */ |
6608 | val = Qnil; | |
fa42c37f | 6609 | for (tmp = Vcoding_category_list; CONSP (tmp); tmp = XCDR (tmp)) |
4ed46869 | 6610 | { |
fa42c37f KH |
6611 | Lisp_Object category_val, category_index; |
6612 | ||
6613 | category_index = Fget (XCAR (tmp), Qcoding_category_index); | |
6614 | category_val = Fsymbol_value (XCAR (tmp)); | |
6615 | if (!NILP (category_val) | |
6616 | && NATNUMP (category_index) | |
6617 | && (coding_mask & (1 << XFASTINT (category_index)))) | |
4ed46869 | 6618 | { |
fa42c37f | 6619 | val = Fcons (category_val, val); |
d46c5b12 KH |
6620 | if (highest) |
6621 | break; | |
4ed46869 KH |
6622 | } |
6623 | } | |
d46c5b12 KH |
6624 | if (!highest) |
6625 | val = Fnreverse (val); | |
4ed46869 | 6626 | |
65059037 | 6627 | /* Then, replace the elements with subsidiary coding systems. */ |
fa42c37f | 6628 | for (tmp = val; CONSP (tmp); tmp = XCDR (tmp)) |
4ed46869 | 6629 | { |
65059037 RS |
6630 | if (eol_type != CODING_EOL_UNDECIDED |
6631 | && eol_type != CODING_EOL_INCONSISTENT) | |
4ed46869 | 6632 | { |
d46c5b12 | 6633 | Lisp_Object eol; |
03699b14 | 6634 | eol = Fget (XCAR (tmp), Qeol_type); |
d46c5b12 | 6635 | if (VECTORP (eol)) |
f3fbd155 | 6636 | XSETCAR (tmp, XVECTOR (eol)->contents[eol_type]); |
4ed46869 KH |
6637 | } |
6638 | } | |
03699b14 | 6639 | return (highest ? XCAR (val) : val); |
93dec019 | 6640 | } |
4ed46869 | 6641 | |
d46c5b12 KH |
6642 | DEFUN ("detect-coding-region", Fdetect_coding_region, Sdetect_coding_region, |
6643 | 2, 3, 0, | |
40fd536c KH |
6644 | doc: /* Detect how the byte sequence in the region is encoded. |
6645 | Return a list of possible coding systems used on decoding a byte | |
6646 | sequence containing the bytes in the region between START and END when | |
6647 | the coding system `undecided' is specified. The list is ordered by | |
6648 | priority decided in the current language environment. | |
48b0f3ae PJ |
6649 | |
6650 | If only ASCII characters are found, it returns a list of single element | |
6651 | `undecided' or its subsidiary coding system according to a detected | |
6652 | end-of-line format. | |
6653 | ||
6654 | If optional argument HIGHEST is non-nil, return the coding system of | |
6655 | highest priority. */) | |
6656 | (start, end, highest) | |
d46c5b12 KH |
6657 | Lisp_Object start, end, highest; |
6658 | { | |
6659 | int from, to; | |
6660 | int from_byte, to_byte; | |
682169fe | 6661 | int include_anchor_byte = 0; |
6289dd10 | 6662 | |
b7826503 PJ |
6663 | CHECK_NUMBER_COERCE_MARKER (start); |
6664 | CHECK_NUMBER_COERCE_MARKER (end); | |
4ed46869 | 6665 | |
d46c5b12 KH |
6666 | validate_region (&start, &end); |
6667 | from = XINT (start), to = XINT (end); | |
6668 | from_byte = CHAR_TO_BYTE (from); | |
6669 | to_byte = CHAR_TO_BYTE (to); | |
6289dd10 | 6670 | |
d46c5b12 KH |
6671 | if (from < GPT && to >= GPT) |
6672 | move_gap_both (to, to_byte); | |
c210f766 KH |
6673 | /* If we an anchor byte `\0' follows the region, we include it in |
6674 | the detecting source. Then code detectors can handle the tailing | |
6675 | byte sequence more accurately. | |
6676 | ||
7d0393cf | 6677 | Fix me: This is not a perfect solution. It is better that we |
c210f766 KH |
6678 | add one more argument, say LAST_BLOCK, to all detect_coding_XXX. |
6679 | */ | |
682169fe KH |
6680 | if (to == Z || (to == GPT && GAP_SIZE > 0)) |
6681 | include_anchor_byte = 1; | |
d46c5b12 | 6682 | return detect_coding_system (BYTE_POS_ADDR (from_byte), |
682169fe | 6683 | to_byte - from_byte + include_anchor_byte, |
0a28aafb KH |
6684 | !NILP (highest), |
6685 | !NILP (current_buffer | |
6686 | ->enable_multibyte_characters)); | |
d46c5b12 | 6687 | } |
6289dd10 | 6688 | |
d46c5b12 KH |
6689 | DEFUN ("detect-coding-string", Fdetect_coding_string, Sdetect_coding_string, |
6690 | 1, 2, 0, | |
eec1f3c7 KH |
6691 | doc: /* Detect how the byte sequence in STRING is encoded. |
6692 | Return a list of possible coding systems used on decoding a byte | |
6693 | sequence containing the bytes in STRING when the coding system | |
6694 | `undecided' is specified. The list is ordered by priority decided in | |
6695 | the current language environment. | |
48b0f3ae PJ |
6696 | |
6697 | If only ASCII characters are found, it returns a list of single element | |
6698 | `undecided' or its subsidiary coding system according to a detected | |
6699 | end-of-line format. | |
6700 | ||
6701 | If optional argument HIGHEST is non-nil, return the coding system of | |
6702 | highest priority. */) | |
6703 | (string, highest) | |
d46c5b12 KH |
6704 | Lisp_Object string, highest; |
6705 | { | |
b7826503 | 6706 | CHECK_STRING (string); |
4ed46869 | 6707 | |
d5db4077 | 6708 | return detect_coding_system (SDATA (string), |
682169fe KH |
6709 | /* "+ 1" is to include the anchor byte |
6710 | `\0'. With this, code detectors can | |
c210f766 KH |
6711 | handle the tailing bytes more |
6712 | accurately. */ | |
d5db4077 | 6713 | SBYTES (string) + 1, |
0a28aafb KH |
6714 | !NILP (highest), |
6715 | STRING_MULTIBYTE (string)); | |
4ed46869 KH |
6716 | } |
6717 | ||
d12168d6 | 6718 | /* Subroutine for Ffind_coding_systems_region_internal. |
05e6f5dc KH |
6719 | |
6720 | Return a list of coding systems that safely encode the multibyte | |
b666620c | 6721 | text between P and PEND. SAFE_CODINGS, if non-nil, is an alist of |
05e6f5dc KH |
6722 | possible coding systems. If it is nil, it means that we have not |
6723 | yet found any coding systems. | |
6724 | ||
12d5b185 KH |
6725 | WORK_TABLE a char-table of which element is set to t once the |
6726 | element is looked up. | |
05e6f5dc KH |
6727 | |
6728 | If a non-ASCII single byte char is found, set | |
6729 | *single_byte_char_found to 1. */ | |
6730 | ||
6731 | static Lisp_Object | |
6732 | find_safe_codings (p, pend, safe_codings, work_table, single_byte_char_found) | |
6733 | unsigned char *p, *pend; | |
6734 | Lisp_Object safe_codings, work_table; | |
6735 | int *single_byte_char_found; | |
6b89e3aa | 6736 | { |
f1ce3dcf | 6737 | int c, len; |
6b89e3aa KH |
6738 | Lisp_Object val, ch; |
6739 | Lisp_Object prev, tail; | |
177c0ea7 | 6740 | |
12d5b185 KH |
6741 | if (NILP (safe_codings)) |
6742 | goto done_safe_codings; | |
6b89e3aa KH |
6743 | while (p < pend) |
6744 | { | |
6745 | c = STRING_CHAR_AND_LENGTH (p, pend - p, len); | |
6746 | p += len; | |
6747 | if (ASCII_BYTE_P (c)) | |
6748 | /* We can ignore ASCII characters here. */ | |
6749 | continue; | |
6750 | if (SINGLE_BYTE_CHAR_P (c)) | |
6751 | *single_byte_char_found = 1; | |
6b89e3aa KH |
6752 | /* Check the safe coding systems for C. */ |
6753 | ch = make_number (c); | |
6754 | val = Faref (work_table, ch); | |
6755 | if (EQ (val, Qt)) | |
6756 | /* This element was already checked. Ignore it. */ | |
6757 | continue; | |
6758 | /* Remember that we checked this element. */ | |
6759 | Faset (work_table, ch, Qt); | |
6760 | ||
6761 | for (prev = tail = safe_codings; CONSP (tail); tail = XCDR (tail)) | |
6762 | { | |
b666620c KH |
6763 | Lisp_Object elt, translation_table, hash_table, accept_latin_extra; |
6764 | int encodable; | |
6765 | ||
6766 | elt = XCAR (tail); | |
6767 | if (CONSP (XCDR (elt))) | |
6768 | { | |
6769 | /* This entry has this format now: | |
6770 | ( CODING SAFE-CHARS TRANSLATION-TABLE HASH-TABLE | |
6771 | ACCEPT-LATIN-EXTRA ) */ | |
6772 | val = XCDR (elt); | |
6773 | encodable = ! NILP (Faref (XCAR (val), ch)); | |
6774 | if (! encodable) | |
6775 | { | |
6776 | val = XCDR (val); | |
6777 | translation_table = XCAR (val); | |
6778 | hash_table = XCAR (XCDR (val)); | |
6779 | accept_latin_extra = XCAR (XCDR (XCDR (val))); | |
6780 | } | |
6781 | } | |
6782 | else | |
6783 | { | |
6784 | /* This entry has this format now: ( CODING . SAFE-CHARS) */ | |
6785 | encodable = ! NILP (Faref (XCDR (elt), ch)); | |
6786 | if (! encodable) | |
6787 | { | |
6788 | /* Transform the format to: | |
6789 | ( CODING SAFE-CHARS TRANSLATION-TABLE HASH-TABLE | |
6790 | ACCEPT-LATIN-EXTRA ) */ | |
6791 | val = Fget (XCAR (elt), Qcoding_system); | |
6792 | translation_table | |
6793 | = Fplist_get (AREF (val, 3), | |
6794 | Qtranslation_table_for_encode); | |
6795 | if (SYMBOLP (translation_table)) | |
6796 | translation_table = Fget (translation_table, | |
6797 | Qtranslation_table); | |
6798 | hash_table | |
6799 | = (CHAR_TABLE_P (translation_table) | |
6800 | ? XCHAR_TABLE (translation_table)->extras[1] | |
6801 | : Qnil); | |
6802 | accept_latin_extra | |
6803 | = ((EQ (AREF (val, 0), make_number (2)) | |
6804 | && VECTORP (AREF (val, 4))) | |
58f99379 | 6805 | ? AREF (AREF (val, 4), 16) |
b666620c KH |
6806 | : Qnil); |
6807 | XSETCAR (tail, list5 (XCAR (elt), XCDR (elt), | |
6808 | translation_table, hash_table, | |
6809 | accept_latin_extra)); | |
6810 | } | |
6811 | } | |
43e4a82f | 6812 | |
b666620c KH |
6813 | if (! encodable |
6814 | && ((CHAR_TABLE_P (translation_table) | |
6815 | && ! NILP (Faref (translation_table, ch))) | |
6816 | || (HASH_TABLE_P (hash_table) | |
6817 | && ! NILP (Fgethash (ch, hash_table, Qnil))) | |
6818 | || (SINGLE_BYTE_CHAR_P (c) | |
6819 | && ! NILP (accept_latin_extra) | |
6820 | && VECTORP (Vlatin_extra_code_table) | |
6821 | && ! NILP (AREF (Vlatin_extra_code_table, c))))) | |
6822 | encodable = 1; | |
6823 | if (encodable) | |
6824 | prev = tail; | |
6825 | else | |
6b89e3aa | 6826 | { |
7c695ab9 | 6827 | /* Exclude this coding system from SAFE_CODINGS. */ |
6b89e3aa | 6828 | if (EQ (tail, safe_codings)) |
12d5b185 KH |
6829 | { |
6830 | safe_codings = XCDR (safe_codings); | |
6831 | if (NILP (safe_codings)) | |
6832 | goto done_safe_codings; | |
6833 | } | |
6b89e3aa KH |
6834 | else |
6835 | XSETCDR (prev, XCDR (tail)); | |
6836 | } | |
6b89e3aa KH |
6837 | } |
6838 | } | |
12d5b185 KH |
6839 | |
6840 | done_safe_codings: | |
6841 | /* If the above loop was terminated before P reaches PEND, it means | |
6842 | SAFE_CODINGS was set to nil. If we have not yet found an | |
6843 | non-ASCII single-byte char, check it now. */ | |
6844 | if (! *single_byte_char_found) | |
6845 | while (p < pend) | |
6846 | { | |
6847 | c = STRING_CHAR_AND_LENGTH (p, pend - p, len); | |
6848 | p += len; | |
6849 | if (! ASCII_BYTE_P (c) | |
6850 | && SINGLE_BYTE_CHAR_P (c)) | |
6851 | { | |
6852 | *single_byte_char_found = 1; | |
6853 | break; | |
6854 | } | |
6855 | } | |
6b89e3aa KH |
6856 | return safe_codings; |
6857 | } | |
6858 | ||
067a6a66 KH |
6859 | DEFUN ("find-coding-systems-region-internal", |
6860 | Ffind_coding_systems_region_internal, | |
6861 | Sfind_coding_systems_region_internal, 2, 2, 0, | |
6b89e3aa KH |
6862 | doc: /* Internal use only. */) |
6863 | (start, end) | |
6864 | Lisp_Object start, end; | |
6865 | { | |
6866 | Lisp_Object work_table, safe_codings; | |
6867 | int non_ascii_p = 0; | |
6868 | int single_byte_char_found = 0; | |
6869 | const unsigned char *p1, *p1end, *p2, *p2end, *p; | |
6870 | ||
6871 | if (STRINGP (start)) | |
6872 | { | |
6873 | if (!STRING_MULTIBYTE (start)) | |
6874 | return Qt; | |
6875 | p1 = SDATA (start), p1end = p1 + SBYTES (start); | |
6876 | p2 = p2end = p1end; | |
6877 | if (SCHARS (start) != SBYTES (start)) | |
6878 | non_ascii_p = 1; | |
6879 | } | |
6880 | else | |
6881 | { | |
6882 | int from, to, stop; | |
6883 | ||
6884 | CHECK_NUMBER_COERCE_MARKER (start); | |
6885 | CHECK_NUMBER_COERCE_MARKER (end); | |
6886 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) | |
6887 | args_out_of_range (start, end); | |
6888 | if (NILP (current_buffer->enable_multibyte_characters)) | |
6889 | return Qt; | |
6890 | from = CHAR_TO_BYTE (XINT (start)); | |
6891 | to = CHAR_TO_BYTE (XINT (end)); | |
6892 | stop = from < GPT_BYTE && GPT_BYTE < to ? GPT_BYTE : to; | |
6893 | p1 = BYTE_POS_ADDR (from), p1end = p1 + (stop - from); | |
6894 | if (stop == to) | |
6895 | p2 = p2end = p1end; | |
6896 | else | |
6897 | p2 = BYTE_POS_ADDR (stop), p2end = p2 + (to - stop); | |
6898 | if (XINT (end) - XINT (start) != to - from) | |
6899 | non_ascii_p = 1; | |
6900 | } | |
6901 | ||
6902 | if (!non_ascii_p) | |
6903 | { | |
6904 | /* We are sure that the text contains no multibyte character. | |
6905 | Check if it contains eight-bit-graphic. */ | |
6906 | p = p1; | |
6907 | for (p = p1; p < p1end && ASCII_BYTE_P (*p); p++); | |
6908 | if (p == p1end) | |
6909 | { | |
6910 | for (p = p2; p < p2end && ASCII_BYTE_P (*p); p++); | |
6911 | if (p == p2end) | |
6912 | return Qt; | |
6913 | } | |
6914 | } | |
6915 | ||
6916 | /* The text contains non-ASCII characters. */ | |
6917 | ||
6918 | work_table = Fmake_char_table (Qchar_coding_system, Qnil); | |
6919 | safe_codings = Fcopy_sequence (XCDR (Vcoding_system_safe_chars)); | |
6920 | ||
067a6a66 KH |
6921 | safe_codings = find_safe_codings (p1, p1end, safe_codings, work_table, |
6922 | &single_byte_char_found); | |
6b89e3aa | 6923 | if (p2 < p2end) |
067a6a66 KH |
6924 | safe_codings = find_safe_codings (p2, p2end, safe_codings, work_table, |
6925 | &single_byte_char_found); | |
6b89e3aa KH |
6926 | if (EQ (safe_codings, XCDR (Vcoding_system_safe_chars))) |
6927 | safe_codings = Qt; | |
6928 | else | |
6929 | { | |
6930 | /* Turn safe_codings to a list of coding systems... */ | |
6931 | Lisp_Object val; | |
6932 | ||
6933 | if (single_byte_char_found) | |
6934 | /* ... and append these for eight-bit chars. */ | |
6935 | val = Fcons (Qraw_text, | |
6936 | Fcons (Qemacs_mule, Fcons (Qno_conversion, Qnil))); | |
6937 | else | |
6938 | /* ... and append generic coding systems. */ | |
6939 | val = Fcopy_sequence (XCAR (Vcoding_system_safe_chars)); | |
177c0ea7 | 6940 | |
6b89e3aa KH |
6941 | for (; CONSP (safe_codings); safe_codings = XCDR (safe_codings)) |
6942 | val = Fcons (XCAR (XCAR (safe_codings)), val); | |
6943 | safe_codings = val; | |
6944 | } | |
6945 | ||
6946 | return safe_codings; | |
6947 | } | |
6948 | ||
6949 | ||
068a9dbd KH |
6950 | /* Search from position POS for such characters that are unencodable |
6951 | accoding to SAFE_CHARS, and return a list of their positions. P | |
6952 | points where in the memory the character at POS exists. Limit the | |
6953 | search at PEND or when Nth unencodable characters are found. | |
6954 | ||
6955 | If SAFE_CHARS is a char table, an element for an unencodable | |
6956 | character is nil. | |
6957 | ||
6958 | If SAFE_CHARS is nil, all non-ASCII characters are unencodable. | |
6959 | ||
6960 | Otherwise, SAFE_CHARS is t, and only eight-bit-contrl and | |
6961 | eight-bit-graphic characters are unencodable. */ | |
6962 | ||
6963 | static Lisp_Object | |
6964 | unencodable_char_position (safe_chars, pos, p, pend, n) | |
6965 | Lisp_Object safe_chars; | |
6966 | int pos; | |
6967 | unsigned char *p, *pend; | |
6968 | int n; | |
6969 | { | |
6970 | Lisp_Object pos_list; | |
6971 | ||
6972 | pos_list = Qnil; | |
6973 | while (p < pend) | |
6974 | { | |
6975 | int len; | |
6976 | int c = STRING_CHAR_AND_LENGTH (p, MAX_MULTIBYTE_LENGTH, len); | |
7d0393cf | 6977 | |
068a9dbd KH |
6978 | if (c >= 128 |
6979 | && (CHAR_TABLE_P (safe_chars) | |
6980 | ? NILP (CHAR_TABLE_REF (safe_chars, c)) | |
6981 | : (NILP (safe_chars) || c < 256))) | |
6982 | { | |
6983 | pos_list = Fcons (make_number (pos), pos_list); | |
6984 | if (--n <= 0) | |
6985 | break; | |
6986 | } | |
6987 | pos++; | |
6988 | p += len; | |
6989 | } | |
6990 | return Fnreverse (pos_list); | |
6991 | } | |
6992 | ||
6993 | ||
6994 | DEFUN ("unencodable-char-position", Funencodable_char_position, | |
6995 | Sunencodable_char_position, 3, 5, 0, | |
6996 | doc: /* | |
6997 | Return position of first un-encodable character in a region. | |
6998 | START and END specfiy the region and CODING-SYSTEM specifies the | |
6999 | encoding to check. Return nil if CODING-SYSTEM does encode the region. | |
7000 | ||
7001 | If optional 4th argument COUNT is non-nil, it specifies at most how | |
7002 | many un-encodable characters to search. In this case, the value is a | |
7003 | list of positions. | |
7004 | ||
7005 | If optional 5th argument STRING is non-nil, it is a string to search | |
7006 | for un-encodable characters. In that case, START and END are indexes | |
7007 | to the string. */) | |
7008 | (start, end, coding_system, count, string) | |
7009 | Lisp_Object start, end, coding_system, count, string; | |
7010 | { | |
7011 | int n; | |
7012 | Lisp_Object safe_chars; | |
7013 | struct coding_system coding; | |
7014 | Lisp_Object positions; | |
7015 | int from, to; | |
7016 | unsigned char *p, *pend; | |
7017 | ||
7018 | if (NILP (string)) | |
7019 | { | |
7020 | validate_region (&start, &end); | |
7021 | from = XINT (start); | |
7022 | to = XINT (end); | |
7023 | if (NILP (current_buffer->enable_multibyte_characters)) | |
7024 | return Qnil; | |
7025 | p = CHAR_POS_ADDR (from); | |
200c93e2 KH |
7026 | if (to == GPT) |
7027 | pend = GPT_ADDR; | |
7028 | else | |
7029 | pend = CHAR_POS_ADDR (to); | |
068a9dbd KH |
7030 | } |
7031 | else | |
7032 | { | |
7033 | CHECK_STRING (string); | |
7034 | CHECK_NATNUM (start); | |
7035 | CHECK_NATNUM (end); | |
7036 | from = XINT (start); | |
7037 | to = XINT (end); | |
7038 | if (from > to | |
7039 | || to > SCHARS (string)) | |
7040 | args_out_of_range_3 (string, start, end); | |
7041 | if (! STRING_MULTIBYTE (string)) | |
7042 | return Qnil; | |
7043 | p = SDATA (string) + string_char_to_byte (string, from); | |
7044 | pend = SDATA (string) + string_char_to_byte (string, to); | |
7045 | } | |
7046 | ||
7047 | setup_coding_system (Fcheck_coding_system (coding_system), &coding); | |
7048 | ||
7049 | if (NILP (count)) | |
7050 | n = 1; | |
7051 | else | |
7052 | { | |
7053 | CHECK_NATNUM (count); | |
7054 | n = XINT (count); | |
7055 | } | |
7056 | ||
7057 | if (coding.type == coding_type_no_conversion | |
7058 | || coding.type == coding_type_raw_text) | |
7059 | return Qnil; | |
7060 | ||
7061 | if (coding.type == coding_type_undecided) | |
7062 | safe_chars = Qnil; | |
7063 | else | |
6b89e3aa | 7064 | safe_chars = coding_safe_chars (coding_system); |
068a9dbd KH |
7065 | |
7066 | if (STRINGP (string) | |
7067 | || from >= GPT || to <= GPT) | |
7068 | positions = unencodable_char_position (safe_chars, from, p, pend, n); | |
7069 | else | |
7070 | { | |
7071 | Lisp_Object args[2]; | |
7072 | ||
7073 | args[0] = unencodable_char_position (safe_chars, from, p, GPT_ADDR, n); | |
96d2e64d | 7074 | n -= XINT (Flength (args[0])); |
068a9dbd KH |
7075 | if (n <= 0) |
7076 | positions = args[0]; | |
7077 | else | |
7078 | { | |
7079 | args[1] = unencodable_char_position (safe_chars, GPT, GAP_END_ADDR, | |
7080 | pend, n); | |
7081 | positions = Fappend (2, args); | |
7082 | } | |
7083 | } | |
7084 | ||
7085 | return (NILP (count) ? Fcar (positions) : positions); | |
7086 | } | |
7087 | ||
7088 | ||
4031e2bf KH |
7089 | Lisp_Object |
7090 | code_convert_region1 (start, end, coding_system, encodep) | |
d46c5b12 | 7091 | Lisp_Object start, end, coding_system; |
4031e2bf | 7092 | int encodep; |
3a73fa5d RS |
7093 | { |
7094 | struct coding_system coding; | |
da55a2b7 | 7095 | int from, to; |
3a73fa5d | 7096 | |
b7826503 PJ |
7097 | CHECK_NUMBER_COERCE_MARKER (start); |
7098 | CHECK_NUMBER_COERCE_MARKER (end); | |
7099 | CHECK_SYMBOL (coding_system); | |
3a73fa5d | 7100 | |
d46c5b12 KH |
7101 | validate_region (&start, &end); |
7102 | from = XFASTINT (start); | |
7103 | to = XFASTINT (end); | |
7104 | ||
3a73fa5d | 7105 | if (NILP (coding_system)) |
d46c5b12 KH |
7106 | return make_number (to - from); |
7107 | ||
3a73fa5d | 7108 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) |
d5db4077 | 7109 | error ("Invalid coding system: %s", SDATA (SYMBOL_NAME (coding_system))); |
3a73fa5d | 7110 | |
d46c5b12 | 7111 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
7112 | coding.src_multibyte = coding.dst_multibyte |
7113 | = !NILP (current_buffer->enable_multibyte_characters); | |
fb88bf2d KH |
7114 | code_convert_region (from, CHAR_TO_BYTE (from), to, CHAR_TO_BYTE (to), |
7115 | &coding, encodep, 1); | |
f072a3e8 | 7116 | Vlast_coding_system_used = coding.symbol; |
fb88bf2d | 7117 | return make_number (coding.produced_char); |
4031e2bf KH |
7118 | } |
7119 | ||
7120 | DEFUN ("decode-coding-region", Fdecode_coding_region, Sdecode_coding_region, | |
7121 | 3, 3, "r\nzCoding system: ", | |
48b0f3ae PJ |
7122 | doc: /* Decode the current region from the specified coding system. |
7123 | When called from a program, takes three arguments: | |
7124 | START, END, and CODING-SYSTEM. START and END are buffer positions. | |
7125 | This function sets `last-coding-system-used' to the precise coding system | |
7126 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
7127 | not fully specified.) | |
7128 | It returns the length of the decoded text. */) | |
7129 | (start, end, coding_system) | |
4031e2bf KH |
7130 | Lisp_Object start, end, coding_system; |
7131 | { | |
7132 | return code_convert_region1 (start, end, coding_system, 0); | |
3a73fa5d RS |
7133 | } |
7134 | ||
7135 | DEFUN ("encode-coding-region", Fencode_coding_region, Sencode_coding_region, | |
7136 | 3, 3, "r\nzCoding system: ", | |
48b0f3ae PJ |
7137 | doc: /* Encode the current region into the specified coding system. |
7138 | When called from a program, takes three arguments: | |
7139 | START, END, and CODING-SYSTEM. START and END are buffer positions. | |
7140 | This function sets `last-coding-system-used' to the precise coding system | |
7141 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
7142 | not fully specified.) | |
7143 | It returns the length of the encoded text. */) | |
7144 | (start, end, coding_system) | |
d46c5b12 | 7145 | Lisp_Object start, end, coding_system; |
3a73fa5d | 7146 | { |
4031e2bf KH |
7147 | return code_convert_region1 (start, end, coding_system, 1); |
7148 | } | |
3a73fa5d | 7149 | |
4031e2bf KH |
7150 | Lisp_Object |
7151 | code_convert_string1 (string, coding_system, nocopy, encodep) | |
7152 | Lisp_Object string, coding_system, nocopy; | |
7153 | int encodep; | |
7154 | { | |
7155 | struct coding_system coding; | |
3a73fa5d | 7156 | |
b7826503 PJ |
7157 | CHECK_STRING (string); |
7158 | CHECK_SYMBOL (coding_system); | |
4ed46869 | 7159 | |
d46c5b12 | 7160 | if (NILP (coding_system)) |
4031e2bf | 7161 | return (NILP (nocopy) ? Fcopy_sequence (string) : string); |
4ed46869 | 7162 | |
d46c5b12 | 7163 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) |
d5db4077 | 7164 | error ("Invalid coding system: %s", SDATA (SYMBOL_NAME (coding_system))); |
5f1cd180 | 7165 | |
d46c5b12 | 7166 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
7167 | string = (encodep |
7168 | ? encode_coding_string (string, &coding, !NILP (nocopy)) | |
7169 | : decode_coding_string (string, &coding, !NILP (nocopy))); | |
f072a3e8 | 7170 | Vlast_coding_system_used = coding.symbol; |
ec6d2bb8 KH |
7171 | |
7172 | return string; | |
4ed46869 KH |
7173 | } |
7174 | ||
4ed46869 | 7175 | DEFUN ("decode-coding-string", Fdecode_coding_string, Sdecode_coding_string, |
e0e989f6 | 7176 | 2, 3, 0, |
48b0f3ae PJ |
7177 | doc: /* Decode STRING which is encoded in CODING-SYSTEM, and return the result. |
7178 | Optional arg NOCOPY non-nil means it is OK to return STRING itself | |
7179 | if the decoding operation is trivial. | |
7180 | This function sets `last-coding-system-used' to the precise coding system | |
7181 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
7182 | not fully specified.) */) | |
7183 | (string, coding_system, nocopy) | |
e0e989f6 | 7184 | Lisp_Object string, coding_system, nocopy; |
4ed46869 | 7185 | { |
f072a3e8 | 7186 | return code_convert_string1 (string, coding_system, nocopy, 0); |
4ed46869 KH |
7187 | } |
7188 | ||
7189 | DEFUN ("encode-coding-string", Fencode_coding_string, Sencode_coding_string, | |
e0e989f6 | 7190 | 2, 3, 0, |
48b0f3ae PJ |
7191 | doc: /* Encode STRING to CODING-SYSTEM, and return the result. |
7192 | Optional arg NOCOPY non-nil means it is OK to return STRING itself | |
7193 | if the encoding operation is trivial. | |
7194 | This function sets `last-coding-system-used' to the precise coding system | |
7195 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
7196 | not fully specified.) */) | |
7197 | (string, coding_system, nocopy) | |
e0e989f6 | 7198 | Lisp_Object string, coding_system, nocopy; |
4ed46869 | 7199 | { |
f072a3e8 | 7200 | return code_convert_string1 (string, coding_system, nocopy, 1); |
4ed46869 | 7201 | } |
4031e2bf | 7202 | |
ecec61c1 | 7203 | /* Encode or decode STRING according to CODING_SYSTEM. |
ec6d2bb8 KH |
7204 | Do not set Vlast_coding_system_used. |
7205 | ||
7206 | This function is called only from macros DECODE_FILE and | |
7207 | ENCODE_FILE, thus we ignore character composition. */ | |
ecec61c1 KH |
7208 | |
7209 | Lisp_Object | |
7210 | code_convert_string_norecord (string, coding_system, encodep) | |
7211 | Lisp_Object string, coding_system; | |
7212 | int encodep; | |
7213 | { | |
7214 | struct coding_system coding; | |
7215 | ||
b7826503 PJ |
7216 | CHECK_STRING (string); |
7217 | CHECK_SYMBOL (coding_system); | |
ecec61c1 KH |
7218 | |
7219 | if (NILP (coding_system)) | |
7220 | return string; | |
7221 | ||
7222 | if (setup_coding_system (Fcheck_coding_system (coding_system), &coding) < 0) | |
d5db4077 | 7223 | error ("Invalid coding system: %s", SDATA (SYMBOL_NAME (coding_system))); |
ecec61c1 | 7224 | |
ec6d2bb8 | 7225 | coding.composing = COMPOSITION_DISABLED; |
ecec61c1 | 7226 | coding.mode |= CODING_MODE_LAST_BLOCK; |
b73bfc1c KH |
7227 | return (encodep |
7228 | ? encode_coding_string (string, &coding, 1) | |
7229 | : decode_coding_string (string, &coding, 1)); | |
ecec61c1 | 7230 | } |
3a73fa5d | 7231 | \f |
4ed46869 | 7232 | DEFUN ("decode-sjis-char", Fdecode_sjis_char, Sdecode_sjis_char, 1, 1, 0, |
48b0f3ae PJ |
7233 | doc: /* Decode a Japanese character which has CODE in shift_jis encoding. |
7234 | Return the corresponding character. */) | |
7235 | (code) | |
4ed46869 KH |
7236 | Lisp_Object code; |
7237 | { | |
7238 | unsigned char c1, c2, s1, s2; | |
7239 | Lisp_Object val; | |
7240 | ||
b7826503 | 7241 | CHECK_NUMBER (code); |
4ed46869 | 7242 | s1 = (XFASTINT (code)) >> 8, s2 = (XFASTINT (code)) & 0xFF; |
55ab7be3 KH |
7243 | if (s1 == 0) |
7244 | { | |
c28a9453 KH |
7245 | if (s2 < 0x80) |
7246 | XSETFASTINT (val, s2); | |
7247 | else if (s2 >= 0xA0 || s2 <= 0xDF) | |
b73bfc1c | 7248 | XSETFASTINT (val, MAKE_CHAR (charset_katakana_jisx0201, s2, 0)); |
c28a9453 | 7249 | else |
9da8350f | 7250 | error ("Invalid Shift JIS code: %x", XFASTINT (code)); |
55ab7be3 KH |
7251 | } |
7252 | else | |
7253 | { | |
87323294 | 7254 | if ((s1 < 0x80 || (s1 > 0x9F && s1 < 0xE0) || s1 > 0xEF) |
55ab7be3 | 7255 | || (s2 < 0x40 || s2 == 0x7F || s2 > 0xFC)) |
9da8350f | 7256 | error ("Invalid Shift JIS code: %x", XFASTINT (code)); |
55ab7be3 | 7257 | DECODE_SJIS (s1, s2, c1, c2); |
b73bfc1c | 7258 | XSETFASTINT (val, MAKE_CHAR (charset_jisx0208, c1, c2)); |
55ab7be3 | 7259 | } |
4ed46869 KH |
7260 | return val; |
7261 | } | |
7262 | ||
7263 | DEFUN ("encode-sjis-char", Fencode_sjis_char, Sencode_sjis_char, 1, 1, 0, | |
48b0f3ae PJ |
7264 | doc: /* Encode a Japanese character CHAR to shift_jis encoding. |
7265 | Return the corresponding code in SJIS. */) | |
7266 | (ch) | |
4ed46869 KH |
7267 | Lisp_Object ch; |
7268 | { | |
bcf26d6a | 7269 | int charset, c1, c2, s1, s2; |
4ed46869 KH |
7270 | Lisp_Object val; |
7271 | ||
b7826503 | 7272 | CHECK_NUMBER (ch); |
4ed46869 | 7273 | SPLIT_CHAR (XFASTINT (ch), charset, c1, c2); |
c28a9453 KH |
7274 | if (charset == CHARSET_ASCII) |
7275 | { | |
7276 | val = ch; | |
7277 | } | |
7278 | else if (charset == charset_jisx0208 | |
7279 | && c1 > 0x20 && c1 < 0x7F && c2 > 0x20 && c2 < 0x7F) | |
4ed46869 KH |
7280 | { |
7281 | ENCODE_SJIS (c1, c2, s1, s2); | |
bcf26d6a | 7282 | XSETFASTINT (val, (s1 << 8) | s2); |
4ed46869 | 7283 | } |
55ab7be3 KH |
7284 | else if (charset == charset_katakana_jisx0201 |
7285 | && c1 > 0x20 && c2 < 0xE0) | |
7286 | { | |
7287 | XSETFASTINT (val, c1 | 0x80); | |
7288 | } | |
4ed46869 | 7289 | else |
55ab7be3 | 7290 | error ("Can't encode to shift_jis: %d", XFASTINT (ch)); |
4ed46869 KH |
7291 | return val; |
7292 | } | |
7293 | ||
7294 | DEFUN ("decode-big5-char", Fdecode_big5_char, Sdecode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
7295 | doc: /* Decode a Big5 character which has CODE in BIG5 coding system. |
7296 | Return the corresponding character. */) | |
7297 | (code) | |
4ed46869 KH |
7298 | Lisp_Object code; |
7299 | { | |
7300 | int charset; | |
7301 | unsigned char b1, b2, c1, c2; | |
7302 | Lisp_Object val; | |
7303 | ||
b7826503 | 7304 | CHECK_NUMBER (code); |
4ed46869 | 7305 | b1 = (XFASTINT (code)) >> 8, b2 = (XFASTINT (code)) & 0xFF; |
c28a9453 KH |
7306 | if (b1 == 0) |
7307 | { | |
7308 | if (b2 >= 0x80) | |
9da8350f | 7309 | error ("Invalid BIG5 code: %x", XFASTINT (code)); |
c28a9453 KH |
7310 | val = code; |
7311 | } | |
7312 | else | |
7313 | { | |
7314 | if ((b1 < 0xA1 || b1 > 0xFE) | |
7315 | || (b2 < 0x40 || (b2 > 0x7E && b2 < 0xA1) || b2 > 0xFE)) | |
9da8350f | 7316 | error ("Invalid BIG5 code: %x", XFASTINT (code)); |
c28a9453 | 7317 | DECODE_BIG5 (b1, b2, charset, c1, c2); |
b73bfc1c | 7318 | XSETFASTINT (val, MAKE_CHAR (charset, c1, c2)); |
c28a9453 | 7319 | } |
4ed46869 KH |
7320 | return val; |
7321 | } | |
7322 | ||
7323 | DEFUN ("encode-big5-char", Fencode_big5_char, Sencode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
7324 | doc: /* Encode the Big5 character CHAR to BIG5 coding system. |
7325 | Return the corresponding character code in Big5. */) | |
7326 | (ch) | |
4ed46869 KH |
7327 | Lisp_Object ch; |
7328 | { | |
bcf26d6a | 7329 | int charset, c1, c2, b1, b2; |
4ed46869 KH |
7330 | Lisp_Object val; |
7331 | ||
b7826503 | 7332 | CHECK_NUMBER (ch); |
4ed46869 | 7333 | SPLIT_CHAR (XFASTINT (ch), charset, c1, c2); |
c28a9453 KH |
7334 | if (charset == CHARSET_ASCII) |
7335 | { | |
7336 | val = ch; | |
7337 | } | |
7338 | else if ((charset == charset_big5_1 | |
7339 | && (XFASTINT (ch) >= 0x250a1 && XFASTINT (ch) <= 0x271ec)) | |
7340 | || (charset == charset_big5_2 | |
7341 | && XFASTINT (ch) >= 0x290a1 && XFASTINT (ch) <= 0x2bdb2)) | |
4ed46869 KH |
7342 | { |
7343 | ENCODE_BIG5 (charset, c1, c2, b1, b2); | |
bcf26d6a | 7344 | XSETFASTINT (val, (b1 << 8) | b2); |
4ed46869 KH |
7345 | } |
7346 | else | |
c28a9453 | 7347 | error ("Can't encode to Big5: %d", XFASTINT (ch)); |
4ed46869 KH |
7348 | return val; |
7349 | } | |
3a73fa5d | 7350 | \f |
002fdb44 | 7351 | DEFUN ("set-terminal-coding-system-internal", Fset_terminal_coding_system_internal, |
68bba4e4 | 7352 | Sset_terminal_coding_system_internal, 1, 2, 0, |
48b0f3ae | 7353 | doc: /* Internal use only. */) |
6ed8eeff | 7354 | (coding_system, terminal) |
4ed46869 | 7355 | Lisp_Object coding_system; |
6ed8eeff | 7356 | Lisp_Object terminal; |
4ed46869 | 7357 | { |
6ed8eeff | 7358 | struct coding_system *terminal_coding = TERMINAL_TERMINAL_CODING (get_terminal (terminal, 1)); |
b7826503 | 7359 | CHECK_SYMBOL (coding_system); |
b8299c66 | 7360 | setup_coding_system (Fcheck_coding_system (coding_system), terminal_coding); |
70c22245 | 7361 | /* We had better not send unsafe characters to terminal. */ |
b8299c66 | 7362 | terminal_coding->mode |= CODING_MODE_INHIBIT_UNENCODABLE_CHAR; |
8ca3766a | 7363 | /* Character composition should be disabled. */ |
b8299c66 | 7364 | terminal_coding->composing = COMPOSITION_DISABLED; |
bd64290d | 7365 | /* Error notification should be suppressed. */ |
b8299c66 KL |
7366 | terminal_coding->suppress_error = 1; |
7367 | terminal_coding->src_multibyte = 1; | |
7368 | terminal_coding->dst_multibyte = 0; | |
4ed46869 KH |
7369 | return Qnil; |
7370 | } | |
7371 | ||
002fdb44 | 7372 | DEFUN ("set-safe-terminal-coding-system-internal", Fset_safe_terminal_coding_system_internal, |
48b0f3ae | 7373 | Sset_safe_terminal_coding_system_internal, 1, 1, 0, |
ddb67bdc | 7374 | doc: /* Internal use only. */) |
48b0f3ae | 7375 | (coding_system) |
c4825358 KH |
7376 | Lisp_Object coding_system; |
7377 | { | |
b7826503 | 7378 | CHECK_SYMBOL (coding_system); |
c4825358 KH |
7379 | setup_coding_system (Fcheck_coding_system (coding_system), |
7380 | &safe_terminal_coding); | |
8ca3766a | 7381 | /* Character composition should be disabled. */ |
ec6d2bb8 | 7382 | safe_terminal_coding.composing = COMPOSITION_DISABLED; |
bd64290d | 7383 | /* Error notification should be suppressed. */ |
b8299c66 | 7384 | safe_terminal_coding.suppress_error = 1; |
b73bfc1c KH |
7385 | safe_terminal_coding.src_multibyte = 1; |
7386 | safe_terminal_coding.dst_multibyte = 0; | |
c4825358 KH |
7387 | return Qnil; |
7388 | } | |
7389 | ||
002fdb44 | 7390 | DEFUN ("terminal-coding-system", Fterminal_coding_system, |
68bba4e4 | 7391 | Sterminal_coding_system, 0, 1, 0, |
6ed8eeff KL |
7392 | doc: /* Return coding system specified for terminal output on the given terminal. |
7393 | TERMINAL may be a terminal id, a frame, or nil for the selected | |
7394 | frame's terminal device. */) | |
7395 | (terminal) | |
7396 | Lisp_Object terminal; | |
4ed46869 | 7397 | { |
6ed8eeff | 7398 | return TERMINAL_TERMINAL_CODING (get_terminal (terminal, 1))->symbol; |
4ed46869 KH |
7399 | } |
7400 | ||
002fdb44 | 7401 | DEFUN ("set-keyboard-coding-system-internal", Fset_keyboard_coding_system_internal, |
68bba4e4 | 7402 | Sset_keyboard_coding_system_internal, 1, 2, 0, |
48b0f3ae | 7403 | doc: /* Internal use only. */) |
6ed8eeff | 7404 | (coding_system, terminal) |
4ed46869 | 7405 | Lisp_Object coding_system; |
6ed8eeff | 7406 | Lisp_Object terminal; |
4ed46869 | 7407 | { |
6ed8eeff | 7408 | struct terminal *t = get_terminal (terminal, 1); |
b7826503 | 7409 | CHECK_SYMBOL (coding_system); |
68bba4e4 | 7410 | |
b8299c66 | 7411 | setup_coding_system (Fcheck_coding_system (coding_system), |
6ed8eeff | 7412 | TERMINAL_KEYBOARD_CODING (t)); |
8ca3766a | 7413 | /* Character composition should be disabled. */ |
6ed8eeff | 7414 | TERMINAL_KEYBOARD_CODING (t)->composing = COMPOSITION_DISABLED; |
4ed46869 KH |
7415 | return Qnil; |
7416 | } | |
7417 | ||
002fdb44 | 7418 | DEFUN ("keyboard-coding-system", Fkeyboard_coding_system, |
68bba4e4 | 7419 | Skeyboard_coding_system, 0, 1, 0, |
6ed8eeff KL |
7420 | doc: /* Return coding system for decoding keyboard input on TERMINAL. |
7421 | TERMINAL may be a terminal id, a frame, or nil for the selected | |
7422 | frame's terminal device. */) | |
7423 | (terminal) | |
7424 | Lisp_Object terminal; | |
4ed46869 | 7425 | { |
6ed8eeff | 7426 | return TERMINAL_KEYBOARD_CODING (get_terminal (terminal, 1))->symbol; |
4ed46869 KH |
7427 | } |
7428 | ||
7429 | \f | |
a5d301df KH |
7430 | DEFUN ("find-operation-coding-system", Ffind_operation_coding_system, |
7431 | Sfind_operation_coding_system, 1, MANY, 0, | |
48b0f3ae PJ |
7432 | doc: /* Choose a coding system for an operation based on the target name. |
7433 | The value names a pair of coding systems: (DECODING-SYSTEM . ENCODING-SYSTEM). | |
7434 | DECODING-SYSTEM is the coding system to use for decoding | |
7435 | \(in case OPERATION does decoding), and ENCODING-SYSTEM is the coding system | |
7436 | for encoding (in case OPERATION does encoding). | |
7437 | ||
7438 | The first argument OPERATION specifies an I/O primitive: | |
7439 | For file I/O, `insert-file-contents' or `write-region'. | |
7440 | For process I/O, `call-process', `call-process-region', or `start-process'. | |
7441 | For network I/O, `open-network-stream'. | |
7442 | ||
7443 | The remaining arguments should be the same arguments that were passed | |
7444 | to the primitive. Depending on which primitive, one of those arguments | |
7445 | is selected as the TARGET. For example, if OPERATION does file I/O, | |
7446 | whichever argument specifies the file name is TARGET. | |
7447 | ||
7448 | TARGET has a meaning which depends on OPERATION: | |
7449 | For file I/O, TARGET is a file name. | |
7450 | For process I/O, TARGET is a process name. | |
7451 | For network I/O, TARGET is a service name or a port number | |
7452 | ||
7453 | This function looks up what specified for TARGET in, | |
7454 | `file-coding-system-alist', `process-coding-system-alist', | |
7455 | or `network-coding-system-alist' depending on OPERATION. | |
7456 | They may specify a coding system, a cons of coding systems, | |
7457 | or a function symbol to call. | |
7458 | In the last case, we call the function with one argument, | |
7459 | which is a list of all the arguments given to this function. | |
7460 | ||
7461 | usage: (find-operation-coding-system OPERATION ARGUMENTS ...) */) | |
7462 | (nargs, args) | |
4ed46869 KH |
7463 | int nargs; |
7464 | Lisp_Object *args; | |
7465 | { | |
7466 | Lisp_Object operation, target_idx, target, val; | |
7467 | register Lisp_Object chain; | |
7468 | ||
7469 | if (nargs < 2) | |
7470 | error ("Too few arguments"); | |
7471 | operation = args[0]; | |
7472 | if (!SYMBOLP (operation) | |
7473 | || !INTEGERP (target_idx = Fget (operation, Qtarget_idx))) | |
8ca3766a | 7474 | error ("Invalid first argument"); |
4ed46869 KH |
7475 | if (nargs < 1 + XINT (target_idx)) |
7476 | error ("Too few arguments for operation: %s", | |
d5db4077 | 7477 | SDATA (SYMBOL_NAME (operation))); |
7f787cfd KH |
7478 | /* For write-region, if the 6th argument (i.e. VISIT, the 5th |
7479 | argument to write-region) is string, it must be treated as a | |
7480 | target file name. */ | |
7481 | if (EQ (operation, Qwrite_region) | |
7482 | && nargs > 5 | |
7483 | && STRINGP (args[5])) | |
d90ed3b4 | 7484 | target_idx = make_number (4); |
4ed46869 KH |
7485 | target = args[XINT (target_idx) + 1]; |
7486 | if (!(STRINGP (target) | |
7487 | || (EQ (operation, Qopen_network_stream) && INTEGERP (target)))) | |
8ca3766a | 7488 | error ("Invalid argument %d", XINT (target_idx) + 1); |
4ed46869 | 7489 | |
2e34157c RS |
7490 | chain = ((EQ (operation, Qinsert_file_contents) |
7491 | || EQ (operation, Qwrite_region)) | |
02ba4723 | 7492 | ? Vfile_coding_system_alist |
2e34157c | 7493 | : (EQ (operation, Qopen_network_stream) |
02ba4723 KH |
7494 | ? Vnetwork_coding_system_alist |
7495 | : Vprocess_coding_system_alist)); | |
4ed46869 KH |
7496 | if (NILP (chain)) |
7497 | return Qnil; | |
7498 | ||
03699b14 | 7499 | for (; CONSP (chain); chain = XCDR (chain)) |
4ed46869 | 7500 | { |
f44d27ce | 7501 | Lisp_Object elt; |
03699b14 | 7502 | elt = XCAR (chain); |
4ed46869 KH |
7503 | |
7504 | if (CONSP (elt) | |
7505 | && ((STRINGP (target) | |
03699b14 KR |
7506 | && STRINGP (XCAR (elt)) |
7507 | && fast_string_match (XCAR (elt), target) >= 0) | |
7508 | || (INTEGERP (target) && EQ (target, XCAR (elt))))) | |
02ba4723 | 7509 | { |
03699b14 | 7510 | val = XCDR (elt); |
b19fd4c5 KH |
7511 | /* Here, if VAL is both a valid coding system and a valid |
7512 | function symbol, we return VAL as a coding system. */ | |
02ba4723 KH |
7513 | if (CONSP (val)) |
7514 | return val; | |
7515 | if (! SYMBOLP (val)) | |
7516 | return Qnil; | |
7517 | if (! NILP (Fcoding_system_p (val))) | |
7518 | return Fcons (val, val); | |
b19fd4c5 KH |
7519 | if (! NILP (Ffboundp (val))) |
7520 | { | |
7521 | val = call1 (val, Flist (nargs, args)); | |
7522 | if (CONSP (val)) | |
7523 | return val; | |
7524 | if (SYMBOLP (val) && ! NILP (Fcoding_system_p (val))) | |
7525 | return Fcons (val, val); | |
7526 | } | |
02ba4723 KH |
7527 | return Qnil; |
7528 | } | |
4ed46869 KH |
7529 | } |
7530 | return Qnil; | |
7531 | } | |
7532 | ||
1397dc18 KH |
7533 | DEFUN ("update-coding-systems-internal", Fupdate_coding_systems_internal, |
7534 | Supdate_coding_systems_internal, 0, 0, 0, | |
48b0f3ae PJ |
7535 | doc: /* Update internal database for ISO2022 and CCL based coding systems. |
7536 | When values of any coding categories are changed, you must | |
7537 | call this function. */) | |
7538 | () | |
d46c5b12 KH |
7539 | { |
7540 | int i; | |
7541 | ||
fa42c37f | 7542 | for (i = CODING_CATEGORY_IDX_EMACS_MULE; i < CODING_CATEGORY_IDX_MAX; i++) |
d46c5b12 | 7543 | { |
1397dc18 KH |
7544 | Lisp_Object val; |
7545 | ||
f5c1dd0d | 7546 | val = SYMBOL_VALUE (XVECTOR (Vcoding_category_table)->contents[i]); |
1397dc18 KH |
7547 | if (!NILP (val)) |
7548 | { | |
7549 | if (! coding_system_table[i]) | |
7550 | coding_system_table[i] = ((struct coding_system *) | |
7551 | xmalloc (sizeof (struct coding_system))); | |
7552 | setup_coding_system (val, coding_system_table[i]); | |
7553 | } | |
7554 | else if (coding_system_table[i]) | |
7555 | { | |
7556 | xfree (coding_system_table[i]); | |
7557 | coding_system_table[i] = NULL; | |
7558 | } | |
d46c5b12 | 7559 | } |
1397dc18 | 7560 | |
d46c5b12 KH |
7561 | return Qnil; |
7562 | } | |
7563 | ||
66cfb530 KH |
7564 | DEFUN ("set-coding-priority-internal", Fset_coding_priority_internal, |
7565 | Sset_coding_priority_internal, 0, 0, 0, | |
48b0f3ae PJ |
7566 | doc: /* Update internal database for the current value of `coding-category-list'. |
7567 | This function is internal use only. */) | |
7568 | () | |
66cfb530 KH |
7569 | { |
7570 | int i = 0, idx; | |
84d60297 RS |
7571 | Lisp_Object val; |
7572 | ||
7573 | val = Vcoding_category_list; | |
66cfb530 KH |
7574 | |
7575 | while (CONSP (val) && i < CODING_CATEGORY_IDX_MAX) | |
7576 | { | |
03699b14 | 7577 | if (! SYMBOLP (XCAR (val))) |
66cfb530 | 7578 | break; |
03699b14 | 7579 | idx = XFASTINT (Fget (XCAR (val), Qcoding_category_index)); |
66cfb530 KH |
7580 | if (idx >= CODING_CATEGORY_IDX_MAX) |
7581 | break; | |
7582 | coding_priorities[i++] = (1 << idx); | |
03699b14 | 7583 | val = XCDR (val); |
66cfb530 KH |
7584 | } |
7585 | /* If coding-category-list is valid and contains all coding | |
7586 | categories, `i' should be CODING_CATEGORY_IDX_MAX now. If not, | |
fa42c37f | 7587 | the following code saves Emacs from crashing. */ |
66cfb530 KH |
7588 | while (i < CODING_CATEGORY_IDX_MAX) |
7589 | coding_priorities[i++] = CODING_CATEGORY_MASK_RAW_TEXT; | |
7590 | ||
7591 | return Qnil; | |
7592 | } | |
7593 | ||
6b89e3aa KH |
7594 | DEFUN ("define-coding-system-internal", Fdefine_coding_system_internal, |
7595 | Sdefine_coding_system_internal, 1, 1, 0, | |
7596 | doc: /* Register CODING-SYSTEM as a base coding system. | |
7597 | This function is internal use only. */) | |
7598 | (coding_system) | |
7599 | Lisp_Object coding_system; | |
7600 | { | |
7601 | Lisp_Object safe_chars, slot; | |
7602 | ||
7603 | if (NILP (Fcheck_coding_system (coding_system))) | |
7604 | Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil)); | |
7605 | safe_chars = coding_safe_chars (coding_system); | |
7606 | if (! EQ (safe_chars, Qt) && ! CHAR_TABLE_P (safe_chars)) | |
7607 | error ("No valid safe-chars property for %s", | |
7608 | SDATA (SYMBOL_NAME (coding_system))); | |
7609 | if (EQ (safe_chars, Qt)) | |
7610 | { | |
7611 | if (NILP (Fmemq (coding_system, XCAR (Vcoding_system_safe_chars)))) | |
7612 | XSETCAR (Vcoding_system_safe_chars, | |
7613 | Fcons (coding_system, XCAR (Vcoding_system_safe_chars))); | |
7614 | } | |
7615 | else | |
7616 | { | |
7617 | slot = Fassq (coding_system, XCDR (Vcoding_system_safe_chars)); | |
7618 | if (NILP (slot)) | |
7619 | XSETCDR (Vcoding_system_safe_chars, | |
7620 | nconc2 (XCDR (Vcoding_system_safe_chars), | |
7621 | Fcons (Fcons (coding_system, safe_chars), Qnil))); | |
7622 | else | |
7623 | XSETCDR (slot, safe_chars); | |
7624 | } | |
7625 | return Qnil; | |
7626 | } | |
7627 | ||
4ed46869 KH |
7628 | #endif /* emacs */ |
7629 | ||
7630 | \f | |
1397dc18 | 7631 | /*** 9. Post-amble ***/ |
4ed46869 | 7632 | |
dfcf069d | 7633 | void |
4ed46869 KH |
7634 | init_coding_once () |
7635 | { | |
7636 | int i; | |
7637 | ||
93dec019 | 7638 | /* Emacs' internal format specific initialize routine. */ |
4ed46869 KH |
7639 | for (i = 0; i <= 0x20; i++) |
7640 | emacs_code_class[i] = EMACS_control_code; | |
7641 | emacs_code_class[0x0A] = EMACS_linefeed_code; | |
7642 | emacs_code_class[0x0D] = EMACS_carriage_return_code; | |
7643 | for (i = 0x21 ; i < 0x7F; i++) | |
7644 | emacs_code_class[i] = EMACS_ascii_code; | |
7645 | emacs_code_class[0x7F] = EMACS_control_code; | |
ec6d2bb8 | 7646 | for (i = 0x80; i < 0xFF; i++) |
4ed46869 KH |
7647 | emacs_code_class[i] = EMACS_invalid_code; |
7648 | emacs_code_class[LEADING_CODE_PRIVATE_11] = EMACS_leading_code_3; | |
7649 | emacs_code_class[LEADING_CODE_PRIVATE_12] = EMACS_leading_code_3; | |
7650 | emacs_code_class[LEADING_CODE_PRIVATE_21] = EMACS_leading_code_4; | |
7651 | emacs_code_class[LEADING_CODE_PRIVATE_22] = EMACS_leading_code_4; | |
7652 | ||
7653 | /* ISO2022 specific initialize routine. */ | |
7654 | for (i = 0; i < 0x20; i++) | |
b73bfc1c | 7655 | iso_code_class[i] = ISO_control_0; |
4ed46869 KH |
7656 | for (i = 0x21; i < 0x7F; i++) |
7657 | iso_code_class[i] = ISO_graphic_plane_0; | |
7658 | for (i = 0x80; i < 0xA0; i++) | |
b73bfc1c | 7659 | iso_code_class[i] = ISO_control_1; |
4ed46869 KH |
7660 | for (i = 0xA1; i < 0xFF; i++) |
7661 | iso_code_class[i] = ISO_graphic_plane_1; | |
7662 | iso_code_class[0x20] = iso_code_class[0x7F] = ISO_0x20_or_0x7F; | |
7663 | iso_code_class[0xA0] = iso_code_class[0xFF] = ISO_0xA0_or_0xFF; | |
7664 | iso_code_class[ISO_CODE_CR] = ISO_carriage_return; | |
7665 | iso_code_class[ISO_CODE_SO] = ISO_shift_out; | |
7666 | iso_code_class[ISO_CODE_SI] = ISO_shift_in; | |
7667 | iso_code_class[ISO_CODE_SS2_7] = ISO_single_shift_2_7; | |
7668 | iso_code_class[ISO_CODE_ESC] = ISO_escape; | |
7669 | iso_code_class[ISO_CODE_SS2] = ISO_single_shift_2; | |
7670 | iso_code_class[ISO_CODE_SS3] = ISO_single_shift_3; | |
7671 | iso_code_class[ISO_CODE_CSI] = ISO_control_sequence_introducer; | |
7672 | ||
c4825358 | 7673 | setup_coding_system (Qnil, &safe_terminal_coding); |
6bc51348 | 7674 | setup_coding_system (Qnil, &default_buffer_file_coding); |
9ce27fde | 7675 | |
d46c5b12 KH |
7676 | bzero (coding_system_table, sizeof coding_system_table); |
7677 | ||
66cfb530 KH |
7678 | bzero (ascii_skip_code, sizeof ascii_skip_code); |
7679 | for (i = 0; i < 128; i++) | |
7680 | ascii_skip_code[i] = 1; | |
7681 | ||
9ce27fde KH |
7682 | #if defined (MSDOS) || defined (WINDOWSNT) |
7683 | system_eol_type = CODING_EOL_CRLF; | |
7684 | #else | |
7685 | system_eol_type = CODING_EOL_LF; | |
7686 | #endif | |
b843d1ae KH |
7687 | |
7688 | inhibit_pre_post_conversion = 0; | |
e0e989f6 KH |
7689 | } |
7690 | ||
7691 | #ifdef emacs | |
7692 | ||
dfcf069d | 7693 | void |
e0e989f6 KH |
7694 | syms_of_coding () |
7695 | { | |
2a47931b KH |
7696 | staticpro (&Vcode_conversion_workbuf_name); |
7697 | Vcode_conversion_workbuf_name = build_string (" *code-conversion-work*"); | |
7698 | ||
e0e989f6 KH |
7699 | Qtarget_idx = intern ("target-idx"); |
7700 | staticpro (&Qtarget_idx); | |
7701 | ||
bb0115a2 RS |
7702 | Qcoding_system_history = intern ("coding-system-history"); |
7703 | staticpro (&Qcoding_system_history); | |
7704 | Fset (Qcoding_system_history, Qnil); | |
7705 | ||
9ce27fde | 7706 | /* Target FILENAME is the first argument. */ |
e0e989f6 | 7707 | Fput (Qinsert_file_contents, Qtarget_idx, make_number (0)); |
9ce27fde | 7708 | /* Target FILENAME is the third argument. */ |
e0e989f6 KH |
7709 | Fput (Qwrite_region, Qtarget_idx, make_number (2)); |
7710 | ||
7711 | Qcall_process = intern ("call-process"); | |
7712 | staticpro (&Qcall_process); | |
9ce27fde | 7713 | /* Target PROGRAM is the first argument. */ |
e0e989f6 KH |
7714 | Fput (Qcall_process, Qtarget_idx, make_number (0)); |
7715 | ||
7716 | Qcall_process_region = intern ("call-process-region"); | |
7717 | staticpro (&Qcall_process_region); | |
9ce27fde | 7718 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
7719 | Fput (Qcall_process_region, Qtarget_idx, make_number (2)); |
7720 | ||
7721 | Qstart_process = intern ("start-process"); | |
7722 | staticpro (&Qstart_process); | |
9ce27fde | 7723 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
7724 | Fput (Qstart_process, Qtarget_idx, make_number (2)); |
7725 | ||
7726 | Qopen_network_stream = intern ("open-network-stream"); | |
7727 | staticpro (&Qopen_network_stream); | |
9ce27fde | 7728 | /* Target SERVICE is the fourth argument. */ |
e0e989f6 KH |
7729 | Fput (Qopen_network_stream, Qtarget_idx, make_number (3)); |
7730 | ||
4ed46869 KH |
7731 | Qcoding_system = intern ("coding-system"); |
7732 | staticpro (&Qcoding_system); | |
7733 | ||
7734 | Qeol_type = intern ("eol-type"); | |
7735 | staticpro (&Qeol_type); | |
7736 | ||
7737 | Qbuffer_file_coding_system = intern ("buffer-file-coding-system"); | |
7738 | staticpro (&Qbuffer_file_coding_system); | |
7739 | ||
7740 | Qpost_read_conversion = intern ("post-read-conversion"); | |
7741 | staticpro (&Qpost_read_conversion); | |
7742 | ||
7743 | Qpre_write_conversion = intern ("pre-write-conversion"); | |
7744 | staticpro (&Qpre_write_conversion); | |
7745 | ||
27901516 KH |
7746 | Qno_conversion = intern ("no-conversion"); |
7747 | staticpro (&Qno_conversion); | |
7748 | ||
7749 | Qundecided = intern ("undecided"); | |
7750 | staticpro (&Qundecided); | |
7751 | ||
4ed46869 KH |
7752 | Qcoding_system_p = intern ("coding-system-p"); |
7753 | staticpro (&Qcoding_system_p); | |
7754 | ||
7755 | Qcoding_system_error = intern ("coding-system-error"); | |
7756 | staticpro (&Qcoding_system_error); | |
7757 | ||
7758 | Fput (Qcoding_system_error, Qerror_conditions, | |
7759 | Fcons (Qcoding_system_error, Fcons (Qerror, Qnil))); | |
7760 | Fput (Qcoding_system_error, Qerror_message, | |
9ce27fde | 7761 | build_string ("Invalid coding system")); |
4ed46869 | 7762 | |
d46c5b12 KH |
7763 | Qcoding_category = intern ("coding-category"); |
7764 | staticpro (&Qcoding_category); | |
4ed46869 KH |
7765 | Qcoding_category_index = intern ("coding-category-index"); |
7766 | staticpro (&Qcoding_category_index); | |
7767 | ||
d46c5b12 KH |
7768 | Vcoding_category_table |
7769 | = Fmake_vector (make_number (CODING_CATEGORY_IDX_MAX), Qnil); | |
7770 | staticpro (&Vcoding_category_table); | |
4ed46869 KH |
7771 | { |
7772 | int i; | |
7773 | for (i = 0; i < CODING_CATEGORY_IDX_MAX; i++) | |
7774 | { | |
d46c5b12 KH |
7775 | XVECTOR (Vcoding_category_table)->contents[i] |
7776 | = intern (coding_category_name[i]); | |
7777 | Fput (XVECTOR (Vcoding_category_table)->contents[i], | |
7778 | Qcoding_category_index, make_number (i)); | |
4ed46869 KH |
7779 | } |
7780 | } | |
7781 | ||
6b89e3aa KH |
7782 | Vcoding_system_safe_chars = Fcons (Qnil, Qnil); |
7783 | staticpro (&Vcoding_system_safe_chars); | |
7784 | ||
f967223b KH |
7785 | Qtranslation_table = intern ("translation-table"); |
7786 | staticpro (&Qtranslation_table); | |
b666620c | 7787 | Fput (Qtranslation_table, Qchar_table_extra_slots, make_number (2)); |
bdd9fb48 | 7788 | |
f967223b KH |
7789 | Qtranslation_table_id = intern ("translation-table-id"); |
7790 | staticpro (&Qtranslation_table_id); | |
84fbb8a0 | 7791 | |
f967223b KH |
7792 | Qtranslation_table_for_decode = intern ("translation-table-for-decode"); |
7793 | staticpro (&Qtranslation_table_for_decode); | |
a5d301df | 7794 | |
f967223b KH |
7795 | Qtranslation_table_for_encode = intern ("translation-table-for-encode"); |
7796 | staticpro (&Qtranslation_table_for_encode); | |
a5d301df | 7797 | |
05e6f5dc KH |
7798 | Qsafe_chars = intern ("safe-chars"); |
7799 | staticpro (&Qsafe_chars); | |
7800 | ||
7801 | Qchar_coding_system = intern ("char-coding-system"); | |
7802 | staticpro (&Qchar_coding_system); | |
7803 | ||
7804 | /* Intern this now in case it isn't already done. | |
7805 | Setting this variable twice is harmless. | |
7806 | But don't staticpro it here--that is done in alloc.c. */ | |
7807 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
7808 | Fput (Qsafe_chars, Qchar_table_extra_slots, make_number (0)); | |
067a6a66 | 7809 | Fput (Qchar_coding_system, Qchar_table_extra_slots, make_number (0)); |
70c22245 | 7810 | |
1397dc18 KH |
7811 | Qvalid_codes = intern ("valid-codes"); |
7812 | staticpro (&Qvalid_codes); | |
7813 | ||
9ce27fde KH |
7814 | Qemacs_mule = intern ("emacs-mule"); |
7815 | staticpro (&Qemacs_mule); | |
7816 | ||
d46c5b12 KH |
7817 | Qraw_text = intern ("raw-text"); |
7818 | staticpro (&Qraw_text); | |
7819 | ||
ecf488bc DL |
7820 | Qutf_8 = intern ("utf-8"); |
7821 | staticpro (&Qutf_8); | |
7822 | ||
a362520d KH |
7823 | Qcoding_system_define_form = intern ("coding-system-define-form"); |
7824 | staticpro (&Qcoding_system_define_form); | |
7825 | ||
4ed46869 KH |
7826 | defsubr (&Scoding_system_p); |
7827 | defsubr (&Sread_coding_system); | |
7828 | defsubr (&Sread_non_nil_coding_system); | |
7829 | defsubr (&Scheck_coding_system); | |
7830 | defsubr (&Sdetect_coding_region); | |
d46c5b12 | 7831 | defsubr (&Sdetect_coding_string); |
05e6f5dc | 7832 | defsubr (&Sfind_coding_systems_region_internal); |
068a9dbd | 7833 | defsubr (&Sunencodable_char_position); |
4ed46869 KH |
7834 | defsubr (&Sdecode_coding_region); |
7835 | defsubr (&Sencode_coding_region); | |
7836 | defsubr (&Sdecode_coding_string); | |
7837 | defsubr (&Sencode_coding_string); | |
7838 | defsubr (&Sdecode_sjis_char); | |
7839 | defsubr (&Sencode_sjis_char); | |
7840 | defsubr (&Sdecode_big5_char); | |
7841 | defsubr (&Sencode_big5_char); | |
1ba9e4ab | 7842 | defsubr (&Sset_terminal_coding_system_internal); |
c4825358 | 7843 | defsubr (&Sset_safe_terminal_coding_system_internal); |
4ed46869 | 7844 | defsubr (&Sterminal_coding_system); |
1ba9e4ab | 7845 | defsubr (&Sset_keyboard_coding_system_internal); |
4ed46869 | 7846 | defsubr (&Skeyboard_coding_system); |
a5d301df | 7847 | defsubr (&Sfind_operation_coding_system); |
1397dc18 | 7848 | defsubr (&Supdate_coding_systems_internal); |
66cfb530 | 7849 | defsubr (&Sset_coding_priority_internal); |
6b89e3aa | 7850 | defsubr (&Sdefine_coding_system_internal); |
4ed46869 | 7851 | |
4608c386 | 7852 | DEFVAR_LISP ("coding-system-list", &Vcoding_system_list, |
48b0f3ae PJ |
7853 | doc: /* List of coding systems. |
7854 | ||
7855 | Do not alter the value of this variable manually. This variable should be | |
7856 | updated by the functions `make-coding-system' and | |
7857 | `define-coding-system-alias'. */); | |
4608c386 KH |
7858 | Vcoding_system_list = Qnil; |
7859 | ||
7860 | DEFVAR_LISP ("coding-system-alist", &Vcoding_system_alist, | |
48b0f3ae PJ |
7861 | doc: /* Alist of coding system names. |
7862 | Each element is one element list of coding system name. | |
7863 | This variable is given to `completing-read' as TABLE argument. | |
7864 | ||
7865 | Do not alter the value of this variable manually. This variable should be | |
7866 | updated by the functions `make-coding-system' and | |
7867 | `define-coding-system-alias'. */); | |
4608c386 KH |
7868 | Vcoding_system_alist = Qnil; |
7869 | ||
4ed46869 | 7870 | DEFVAR_LISP ("coding-category-list", &Vcoding_category_list, |
48b0f3ae PJ |
7871 | doc: /* List of coding-categories (symbols) ordered by priority. |
7872 | ||
7873 | On detecting a coding system, Emacs tries code detection algorithms | |
7874 | associated with each coding-category one by one in this order. When | |
7875 | one algorithm agrees with a byte sequence of source text, the coding | |
0ec31faf KH |
7876 | system bound to the corresponding coding-category is selected. |
7877 | ||
42205607 | 7878 | Don't modify this variable directly, but use `set-coding-priority'. */); |
4ed46869 KH |
7879 | { |
7880 | int i; | |
7881 | ||
7882 | Vcoding_category_list = Qnil; | |
7883 | for (i = CODING_CATEGORY_IDX_MAX - 1; i >= 0; i--) | |
7884 | Vcoding_category_list | |
d46c5b12 KH |
7885 | = Fcons (XVECTOR (Vcoding_category_table)->contents[i], |
7886 | Vcoding_category_list); | |
4ed46869 KH |
7887 | } |
7888 | ||
7889 | DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read, | |
48b0f3ae PJ |
7890 | doc: /* Specify the coding system for read operations. |
7891 | It is useful to bind this variable with `let', but do not set it globally. | |
7892 | If the value is a coding system, it is used for decoding on read operation. | |
7893 | If not, an appropriate element is used from one of the coding system alists: | |
7894 | There are three such tables, `file-coding-system-alist', | |
7895 | `process-coding-system-alist', and `network-coding-system-alist'. */); | |
4ed46869 KH |
7896 | Vcoding_system_for_read = Qnil; |
7897 | ||
7898 | DEFVAR_LISP ("coding-system-for-write", &Vcoding_system_for_write, | |
48b0f3ae PJ |
7899 | doc: /* Specify the coding system for write operations. |
7900 | Programs bind this variable with `let', but you should not set it globally. | |
7901 | If the value is a coding system, it is used for encoding of output, | |
7902 | when writing it to a file and when sending it to a file or subprocess. | |
7903 | ||
7904 | If this does not specify a coding system, an appropriate element | |
7905 | is used from one of the coding system alists: | |
7906 | There are three such tables, `file-coding-system-alist', | |
7907 | `process-coding-system-alist', and `network-coding-system-alist'. | |
7908 | For output to files, if the above procedure does not specify a coding system, | |
7909 | the value of `buffer-file-coding-system' is used. */); | |
4ed46869 KH |
7910 | Vcoding_system_for_write = Qnil; |
7911 | ||
7912 | DEFVAR_LISP ("last-coding-system-used", &Vlast_coding_system_used, | |
7c695ab9 DL |
7913 | doc: /* Coding system used in the latest file or process I/O. |
7914 | Also set by `encode-coding-region', `decode-coding-region', | |
7915 | `encode-coding-string' and `decode-coding-string'. */); | |
4ed46869 KH |
7916 | Vlast_coding_system_used = Qnil; |
7917 | ||
9ce27fde | 7918 | DEFVAR_BOOL ("inhibit-eol-conversion", &inhibit_eol_conversion, |
48b0f3ae PJ |
7919 | doc: /* *Non-nil means always inhibit code conversion of end-of-line format. |
7920 | See info node `Coding Systems' and info node `Text and Binary' concerning | |
7921 | such conversion. */); | |
9ce27fde KH |
7922 | inhibit_eol_conversion = 0; |
7923 | ||
ed29121d | 7924 | DEFVAR_BOOL ("inherit-process-coding-system", &inherit_process_coding_system, |
48b0f3ae PJ |
7925 | doc: /* Non-nil means process buffer inherits coding system of process output. |
7926 | Bind it to t if the process output is to be treated as if it were a file | |
7927 | read from some filesystem. */); | |
ed29121d EZ |
7928 | inherit_process_coding_system = 0; |
7929 | ||
02ba4723 | 7930 | DEFVAR_LISP ("file-coding-system-alist", &Vfile_coding_system_alist, |
48b0f3ae PJ |
7931 | doc: /* Alist to decide a coding system to use for a file I/O operation. |
7932 | The format is ((PATTERN . VAL) ...), | |
7933 | where PATTERN is a regular expression matching a file name, | |
7934 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
7935 | If VAL is a coding system, it is used for both decoding and encoding | |
7936 | the file contents. | |
7937 | If VAL is a cons of coding systems, the car part is used for decoding, | |
7938 | and the cdr part is used for encoding. | |
7939 | If VAL is a function symbol, the function must return a coding system | |
0192762c | 7940 | or a cons of coding systems which are used as above. The function gets |
ff955d90 | 7941 | the arguments with which `find-operation-coding-system' was called. |
48b0f3ae PJ |
7942 | |
7943 | See also the function `find-operation-coding-system' | |
7944 | and the variable `auto-coding-alist'. */); | |
02ba4723 KH |
7945 | Vfile_coding_system_alist = Qnil; |
7946 | ||
7947 | DEFVAR_LISP ("process-coding-system-alist", &Vprocess_coding_system_alist, | |
48b0f3ae PJ |
7948 | doc: /* Alist to decide a coding system to use for a process I/O operation. |
7949 | The format is ((PATTERN . VAL) ...), | |
7950 | where PATTERN is a regular expression matching a program name, | |
7951 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
7952 | If VAL is a coding system, it is used for both decoding what received | |
7953 | from the program and encoding what sent to the program. | |
7954 | If VAL is a cons of coding systems, the car part is used for decoding, | |
7955 | and the cdr part is used for encoding. | |
7956 | If VAL is a function symbol, the function must return a coding system | |
7957 | or a cons of coding systems which are used as above. | |
7958 | ||
7959 | See also the function `find-operation-coding-system'. */); | |
02ba4723 KH |
7960 | Vprocess_coding_system_alist = Qnil; |
7961 | ||
7962 | DEFVAR_LISP ("network-coding-system-alist", &Vnetwork_coding_system_alist, | |
48b0f3ae PJ |
7963 | doc: /* Alist to decide a coding system to use for a network I/O operation. |
7964 | The format is ((PATTERN . VAL) ...), | |
7965 | where PATTERN is a regular expression matching a network service name | |
7966 | or is a port number to connect to, | |
7967 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
7968 | If VAL is a coding system, it is used for both decoding what received | |
7969 | from the network stream and encoding what sent to the network stream. | |
7970 | If VAL is a cons of coding systems, the car part is used for decoding, | |
7971 | and the cdr part is used for encoding. | |
7972 | If VAL is a function symbol, the function must return a coding system | |
7973 | or a cons of coding systems which are used as above. | |
7974 | ||
7975 | See also the function `find-operation-coding-system'. */); | |
02ba4723 | 7976 | Vnetwork_coding_system_alist = Qnil; |
4ed46869 | 7977 | |
68c45bf0 | 7978 | DEFVAR_LISP ("locale-coding-system", &Vlocale_coding_system, |
75205970 RS |
7979 | doc: /* Coding system to use with system messages. |
7980 | Also used for decoding keyboard input on X Window system. */); | |
68c45bf0 PE |
7981 | Vlocale_coding_system = Qnil; |
7982 | ||
005f0d35 | 7983 | /* The eol mnemonics are reset in startup.el system-dependently. */ |
7722baf9 | 7984 | DEFVAR_LISP ("eol-mnemonic-unix", &eol_mnemonic_unix, |
48b0f3ae | 7985 | doc: /* *String displayed in mode line for UNIX-like (LF) end-of-line format. */); |
7722baf9 | 7986 | eol_mnemonic_unix = build_string (":"); |
4ed46869 | 7987 | |
7722baf9 | 7988 | DEFVAR_LISP ("eol-mnemonic-dos", &eol_mnemonic_dos, |
48b0f3ae | 7989 | doc: /* *String displayed in mode line for DOS-like (CRLF) end-of-line format. */); |
7722baf9 | 7990 | eol_mnemonic_dos = build_string ("\\"); |
4ed46869 | 7991 | |
7722baf9 | 7992 | DEFVAR_LISP ("eol-mnemonic-mac", &eol_mnemonic_mac, |
48b0f3ae | 7993 | doc: /* *String displayed in mode line for MAC-like (CR) end-of-line format. */); |
7722baf9 | 7994 | eol_mnemonic_mac = build_string ("/"); |
4ed46869 | 7995 | |
7722baf9 | 7996 | DEFVAR_LISP ("eol-mnemonic-undecided", &eol_mnemonic_undecided, |
48b0f3ae | 7997 | doc: /* *String displayed in mode line when end-of-line format is not yet determined. */); |
7722baf9 | 7998 | eol_mnemonic_undecided = build_string (":"); |
4ed46869 | 7999 | |
84fbb8a0 | 8000 | DEFVAR_LISP ("enable-character-translation", &Venable_character_translation, |
48b0f3ae | 8001 | doc: /* *Non-nil enables character translation while encoding and decoding. */); |
84fbb8a0 | 8002 | Venable_character_translation = Qt; |
bdd9fb48 | 8003 | |
f967223b | 8004 | DEFVAR_LISP ("standard-translation-table-for-decode", |
48b0f3ae PJ |
8005 | &Vstandard_translation_table_for_decode, |
8006 | doc: /* Table for translating characters while decoding. */); | |
f967223b | 8007 | Vstandard_translation_table_for_decode = Qnil; |
bdd9fb48 | 8008 | |
f967223b | 8009 | DEFVAR_LISP ("standard-translation-table-for-encode", |
48b0f3ae PJ |
8010 | &Vstandard_translation_table_for_encode, |
8011 | doc: /* Table for translating characters while encoding. */); | |
f967223b | 8012 | Vstandard_translation_table_for_encode = Qnil; |
4ed46869 KH |
8013 | |
8014 | DEFVAR_LISP ("charset-revision-table", &Vcharset_revision_alist, | |
48b0f3ae PJ |
8015 | doc: /* Alist of charsets vs revision numbers. |
8016 | While encoding, if a charset (car part of an element) is found, | |
8017 | designate it with the escape sequence identifying revision (cdr part of the element). */); | |
4ed46869 | 8018 | Vcharset_revision_alist = Qnil; |
02ba4723 KH |
8019 | |
8020 | DEFVAR_LISP ("default-process-coding-system", | |
8021 | &Vdefault_process_coding_system, | |
48b0f3ae PJ |
8022 | doc: /* Cons of coding systems used for process I/O by default. |
8023 | The car part is used for decoding a process output, | |
8024 | the cdr part is used for encoding a text to be sent to a process. */); | |
02ba4723 | 8025 | Vdefault_process_coding_system = Qnil; |
c4825358 | 8026 | |
3f003981 | 8027 | DEFVAR_LISP ("latin-extra-code-table", &Vlatin_extra_code_table, |
48b0f3ae PJ |
8028 | doc: /* Table of extra Latin codes in the range 128..159 (inclusive). |
8029 | This is a vector of length 256. | |
8030 | If Nth element is non-nil, the existence of code N in a file | |
8031 | \(or output of subprocess) doesn't prevent it to be detected as | |
8032 | a coding system of ISO 2022 variant which has a flag | |
8033 | `accept-latin-extra-code' t (e.g. iso-latin-1) on reading a file | |
8034 | or reading output of a subprocess. | |
8035 | Only 128th through 159th elements has a meaning. */); | |
3f003981 | 8036 | Vlatin_extra_code_table = Fmake_vector (make_number (256), Qnil); |
d46c5b12 KH |
8037 | |
8038 | DEFVAR_LISP ("select-safe-coding-system-function", | |
8039 | &Vselect_safe_coding_system_function, | |
48b0f3ae PJ |
8040 | doc: /* Function to call to select safe coding system for encoding a text. |
8041 | ||
8042 | If set, this function is called to force a user to select a proper | |
8043 | coding system which can encode the text in the case that a default | |
8044 | coding system used in each operation can't encode the text. | |
8045 | ||
8046 | The default value is `select-safe-coding-system' (which see). */); | |
d46c5b12 KH |
8047 | Vselect_safe_coding_system_function = Qnil; |
8048 | ||
5d5bf4d8 KH |
8049 | DEFVAR_BOOL ("coding-system-require-warning", |
8050 | &coding_system_require_warning, | |
8051 | doc: /* Internal use only. | |
6b89e3aa KH |
8052 | If non-nil, on writing a file, `select-safe-coding-system-function' is |
8053 | called even if `coding-system-for-write' is non-nil. The command | |
8054 | `universal-coding-system-argument' binds this variable to t temporarily. */); | |
5d5bf4d8 KH |
8055 | coding_system_require_warning = 0; |
8056 | ||
8057 | ||
22ab2303 | 8058 | DEFVAR_BOOL ("inhibit-iso-escape-detection", |
74383408 | 8059 | &inhibit_iso_escape_detection, |
48b0f3ae PJ |
8060 | doc: /* If non-nil, Emacs ignores ISO2022's escape sequence on code detection. |
8061 | ||
8062 | By default, on reading a file, Emacs tries to detect how the text is | |
8063 | encoded. This code detection is sensitive to escape sequences. If | |
8064 | the sequence is valid as ISO2022, the code is determined as one of | |
8065 | the ISO2022 encodings, and the file is decoded by the corresponding | |
8066 | coding system (e.g. `iso-2022-7bit'). | |
8067 | ||
8068 | However, there may be a case that you want to read escape sequences in | |
8069 | a file as is. In such a case, you can set this variable to non-nil. | |
8070 | Then, as the code detection ignores any escape sequences, no file is | |
8071 | detected as encoded in some ISO2022 encoding. The result is that all | |
8072 | escape sequences become visible in a buffer. | |
8073 | ||
8074 | The default value is nil, and it is strongly recommended not to change | |
8075 | it. That is because many Emacs Lisp source files that contain | |
8076 | non-ASCII characters are encoded by the coding system `iso-2022-7bit' | |
8077 | in Emacs's distribution, and they won't be decoded correctly on | |
8078 | reading if you suppress escape sequence detection. | |
8079 | ||
8080 | The other way to read escape sequences in a file without decoding is | |
8081 | to explicitly specify some coding system that doesn't use ISO2022's | |
8082 | escape sequence (e.g `latin-1') on reading by \\[universal-coding-system-argument]. */); | |
74383408 | 8083 | inhibit_iso_escape_detection = 0; |
002fdb44 DL |
8084 | |
8085 | DEFVAR_LISP ("translation-table-for-input", &Vtranslation_table_for_input, | |
15c8f9d1 DL |
8086 | doc: /* Char table for translating self-inserting characters. |
8087 | This is applied to the result of input methods, not their input. See also | |
8088 | `keyboard-translate-table'. */); | |
002fdb44 | 8089 | Vtranslation_table_for_input = Qnil; |
4ed46869 KH |
8090 | } |
8091 | ||
68c45bf0 PE |
8092 | char * |
8093 | emacs_strerror (error_number) | |
8094 | int error_number; | |
8095 | { | |
8096 | char *str; | |
8097 | ||
ca9c0567 | 8098 | synchronize_system_messages_locale (); |
68c45bf0 PE |
8099 | str = strerror (error_number); |
8100 | ||
8101 | if (! NILP (Vlocale_coding_system)) | |
8102 | { | |
8103 | Lisp_Object dec = code_convert_string_norecord (build_string (str), | |
8104 | Vlocale_coding_system, | |
8105 | 0); | |
d5db4077 | 8106 | str = (char *) SDATA (dec); |
68c45bf0 PE |
8107 | } |
8108 | ||
8109 | return str; | |
8110 | } | |
8111 | ||
4ed46869 | 8112 | #endif /* emacs */ |
c2f94ebc | 8113 | |
ab5796a9 MB |
8114 | /* arch-tag: 3a3a2b01-5ff6-4071-9afe-f5b808d9229d |
8115 | (do not change this comment) */ |