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4ed46869 | 1 | /* Coding system handler (conversion, detection, and etc). |
4a2f9c6a | 2 | Copyright (C) 1995, 1997, 1998 Electrotechnical Laboratory, JAPAN. |
203cb916 | 3 | Licensed to the Free Software Foundation. |
70ad9fc4 | 4 | Copyright (C) 2001 Free Software Foundation, Inc. |
df7492f9 KH |
5 | Copyright (C) 2001, 2002 |
6 | National Institute of Advanced Industrial Science and Technology (AIST) | |
7 | Registration Number H13PRO009 | |
4ed46869 | 8 | |
369314dc KH |
9 | This file is part of GNU Emacs. |
10 | ||
11 | GNU Emacs is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2, or (at your option) | |
14 | any later version. | |
4ed46869 | 15 | |
369314dc KH |
16 | GNU Emacs is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
4ed46869 | 20 | |
369314dc KH |
21 | You should have received a copy of the GNU General Public License |
22 | along with GNU Emacs; see the file COPYING. If not, write to | |
23 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | Boston, MA 02111-1307, USA. */ | |
4ed46869 KH |
25 | |
26 | /*** TABLE OF CONTENTS *** | |
27 | ||
b73bfc1c | 28 | 0. General comments |
4ed46869 | 29 | 1. Preamble |
df7492f9 KH |
30 | 2. Emacs' internal format (emacs-utf-8) handlers |
31 | 3. UTF-8 handlers | |
32 | 4. UTF-16 handlers | |
33 | 5. Charset-base coding systems handlers | |
34 | 6. emacs-mule (old Emacs' internal format) handlers | |
35 | 7. ISO2022 handlers | |
36 | 8. Shift-JIS and BIG5 handlers | |
37 | 9. CCL handlers | |
38 | 10. C library functions | |
39 | 11. Emacs Lisp library functions | |
40 | 12. Postamble | |
4ed46869 KH |
41 | |
42 | */ | |
43 | ||
df7492f9 | 44 | /*** 0. General comments *** |
b73bfc1c KH |
45 | |
46 | ||
df7492f9 | 47 | CODING SYSTEM |
4ed46869 | 48 | |
e19c3639 KH |
49 | Coding system is an object for a encoding mechanism that contains |
50 | information about how to convert byte sequence to character | |
51 | sequences and vice versa. When we say "decode", it means converting | |
52 | a byte sequence of a specific coding system into a character | |
53 | sequence that is represented by Emacs' internal coding system | |
54 | `emacs-utf-8', and when we say "encode", it means converting a | |
55 | character sequence of emacs-utf-8 to a byte sequence of a specific | |
56 | coding system. | |
57 | ||
58 | In Emacs Lisp, a coding system is represented by a Lisp symbol. In | |
59 | C level, a coding system is represented by a vector of attributes | |
60 | stored in the hash table Vcharset_hash_table. The conversion from a | |
61 | coding system symbol to attributes vector is done by looking up | |
62 | Vcharset_hash_table by the symbol. | |
63 | ||
64 | Coding systems are classified into the following types depending on | |
65 | the mechanism of encoding. Here's a brief descrition about type. | |
df7492f9 KH |
66 | |
67 | o UTF-8 | |
68 | ||
69 | o UTF-16 | |
70 | ||
71 | o Charset-base coding system | |
72 | ||
73 | A coding system defined by one or more (coded) character sets. | |
74 | Decoding and encoding are done by code converter defined for each | |
75 | character set. | |
76 | ||
77 | o Old Emacs' internal format (emacs-mule) | |
78 | ||
79 | The coding system adopted by an old versions of Emacs (20 and 21). | |
4ed46869 | 80 | |
df7492f9 | 81 | o ISO2022-base coding system |
93dec019 | 82 | |
df7492f9 KH |
83 | The most famous coding system for multiple character sets. X's |
84 | Compound Text, various EUCs (Extended Unix Code), and coding systems | |
85 | used in the Internet communication such as ISO-2022-JP are all | |
86 | variants of ISO2022. | |
87 | ||
88 | o SJIS (or Shift-JIS or MS-Kanji-Code) | |
89 | ||
4ed46869 KH |
90 | A coding system to encode character sets: ASCII, JISX0201, and |
91 | JISX0208. Widely used for PC's in Japan. Details are described in | |
df7492f9 | 92 | section 8. |
4ed46869 | 93 | |
df7492f9 | 94 | o BIG5 |
4ed46869 | 95 | |
df7492f9 KH |
96 | A coding system to encode character sets: ASCII and Big5. Widely |
97 | used by Chinese (mainly in Taiwan and Hong Kong). Details are | |
98 | described in section 8. In this file, when we write "big5" (all | |
99 | lowercase), we mean the coding system, and when we write "Big5" | |
100 | (capitalized), we mean the character set. | |
4ed46869 | 101 | |
df7492f9 | 102 | o CCL |
27901516 | 103 | |
df7492f9 KH |
104 | If a user wants to decode/encode a text encoded in a coding system |
105 | not listed above, he can supply a decoder and an encoder for it in | |
106 | CCL (Code Conversion Language) programs. Emacs executes the CCL | |
107 | program while decoding/encoding. | |
27901516 | 108 | |
df7492f9 | 109 | o Raw-text |
4ed46869 | 110 | |
df7492f9 KH |
111 | A coding system for a text containing raw eight-bit data. Emacs |
112 | treat each byte of source text as a character (except for | |
113 | end-of-line conversion). | |
4ed46869 | 114 | |
df7492f9 KH |
115 | o No-conversion |
116 | ||
117 | Like raw text, but don't do end-of-line conversion. | |
4ed46869 | 118 | |
4ed46869 | 119 | |
df7492f9 | 120 | END-OF-LINE FORMAT |
4ed46869 | 121 | |
df7492f9 KH |
122 | How end-of-line of a text is encoded depends on a system. For |
123 | instance, Unix's format is just one byte of LF (line-feed) code, | |
f4dee582 | 124 | whereas DOS's format is two-byte sequence of `carriage-return' and |
d46c5b12 KH |
125 | `line-feed' codes. MacOS's format is usually one byte of |
126 | `carriage-return'. | |
4ed46869 | 127 | |
df7492f9 KH |
128 | Since text characters encoding and end-of-line encoding are |
129 | independent, any coding system described above can take any format | |
130 | of end-of-line (except for no-conversion). | |
4ed46869 | 131 | |
e19c3639 KH |
132 | STRUCT CODING_SYSTEM |
133 | ||
134 | Before using a coding system for code conversion (i.e. decoding and | |
135 | encoding), we setup a structure of type `struct coding_system'. | |
136 | This structure keeps various information about a specific code | |
137 | conversion (e.g. the location of source and destination data). | |
138 | ||
4ed46869 KH |
139 | */ |
140 | ||
df7492f9 KH |
141 | /* COMMON MACROS */ |
142 | ||
143 | ||
4ed46869 KH |
144 | /*** GENERAL NOTES on `detect_coding_XXX ()' functions *** |
145 | ||
df7492f9 KH |
146 | These functions check if a byte sequence specified as a source in |
147 | CODING conforms to the format of XXX. Return 1 if the data contains | |
148 | a byte sequence which can be decoded into non-ASCII characters by | |
149 | the coding system. Otherwize (i.e. the data contains only ASCII | |
150 | characters or invalid sequence) return 0. | |
151 | ||
152 | It also resets some bits of an integer pointed by MASK. The macros | |
153 | CATEGORY_MASK_XXX specifies each bit of this integer. | |
154 | ||
155 | Below is the template of these functions. */ | |
156 | ||
4ed46869 | 157 | #if 0 |
df7492f9 KH |
158 | static int |
159 | detect_coding_XXX (coding, mask) | |
160 | struct coding_system *coding; | |
161 | int *mask; | |
4ed46869 | 162 | { |
df7492f9 KH |
163 | unsigned char *src = coding->source; |
164 | unsigned char *src_end = coding->source + coding->src_bytes; | |
165 | int multibytep = coding->src_multibyte; | |
166 | int c; | |
167 | int found = 0; | |
168 | ...; | |
169 | ||
170 | while (1) | |
171 | { | |
172 | /* Get one byte from the source. If the souce is exausted, jump | |
173 | to no_more_source:. */ | |
174 | ONE_MORE_BYTE (c); | |
175 | /* Check if it conforms to XXX. If not, break the loop. */ | |
176 | } | |
177 | /* As the data is invalid for XXX, reset a proper bits. */ | |
178 | *mask &= ~CODING_CATEGORY_XXX; | |
179 | return 0; | |
180 | no_more_source: | |
181 | /* The source exausted. */ | |
182 | if (!found) | |
183 | /* ASCII characters only. */ | |
184 | return 0; | |
185 | /* Some data should be decoded into non-ASCII characters. */ | |
186 | *mask &= CODING_CATEGORY_XXX; | |
187 | return 1; | |
4ed46869 KH |
188 | } |
189 | #endif | |
190 | ||
191 | /*** GENERAL NOTES on `decode_coding_XXX ()' functions *** | |
192 | ||
df7492f9 KH |
193 | These functions decode a byte sequence specified as a source by |
194 | CODING. The resulting multibyte text goes to a place pointed to by | |
195 | CODING->charbuf, the length of which should not exceed | |
196 | CODING->charbuf_size; | |
d46c5b12 | 197 | |
df7492f9 KH |
198 | These functions set the information of original and decoded texts in |
199 | CODING->consumed, CODING->consumed_char, and CODING->charbuf_used. | |
200 | They also set CODING->result to one of CODING_RESULT_XXX indicating | |
201 | how the decoding is finished. | |
d46c5b12 | 202 | |
df7492f9 | 203 | Below is the template of these functions. */ |
d46c5b12 | 204 | |
4ed46869 | 205 | #if 0 |
b73bfc1c | 206 | static void |
df7492f9 | 207 | decode_coding_XXXX (coding) |
4ed46869 | 208 | struct coding_system *coding; |
4ed46869 | 209 | { |
df7492f9 KH |
210 | unsigned char *src = coding->source + coding->consumed; |
211 | unsigned char *src_end = coding->source + coding->src_bytes; | |
212 | /* SRC_BASE remembers the start position in source in each loop. | |
213 | The loop will be exited when there's not enough source code, or | |
214 | when there's no room in CHARBUF for a decoded character. */ | |
215 | unsigned char *src_base; | |
216 | /* A buffer to produce decoded characters. */ | |
217 | int *charbuf = coding->charbuf; | |
218 | int *charbuf_end = charbuf + coding->charbuf_size; | |
219 | int multibytep = coding->src_multibyte; | |
220 | ||
221 | while (1) | |
222 | { | |
223 | src_base = src; | |
224 | if (charbuf < charbuf_end) | |
225 | /* No more room to produce a decoded character. */ | |
226 | break; | |
227 | ONE_MORE_BYTE (c); | |
228 | /* Decode it. */ | |
229 | } | |
230 | ||
231 | no_more_source: | |
232 | if (src_base < src_end | |
233 | && coding->mode & CODING_MODE_LAST_BLOCK) | |
234 | /* If the source ends by partial bytes to construct a character, | |
235 | treat them as eight-bit raw data. */ | |
236 | while (src_base < src_end && charbuf < charbuf_end) | |
237 | *charbuf++ = *src_base++; | |
238 | /* Remember how many bytes and characters we consumed. If the | |
239 | source is multibyte, the bytes and chars are not identical. */ | |
240 | coding->consumed = coding->consumed_char = src_base - coding->source; | |
241 | /* Remember how many characters we produced. */ | |
242 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
243 | } |
244 | #endif | |
245 | ||
246 | /*** GENERAL NOTES on `encode_coding_XXX ()' functions *** | |
247 | ||
df7492f9 KH |
248 | These functions encode SRC_BYTES length text at SOURCE of Emacs' |
249 | internal multibyte format by CODING. The resulting byte sequence | |
b73bfc1c KH |
250 | goes to a place pointed to by DESTINATION, the length of which |
251 | should not exceed DST_BYTES. | |
d46c5b12 | 252 | |
df7492f9 KH |
253 | These functions set the information of original and encoded texts in |
254 | the members produced, produced_char, consumed, and consumed_char of | |
255 | the structure *CODING. They also set the member result to one of | |
256 | CODING_RESULT_XXX indicating how the encoding finished. | |
d46c5b12 | 257 | |
df7492f9 KH |
258 | DST_BYTES zero means that source area and destination area are |
259 | overlapped, which means that we can produce a encoded text until it | |
260 | reaches at the head of not-yet-encoded source text. | |
d46c5b12 | 261 | |
df7492f9 | 262 | Below is a template of these functions. */ |
4ed46869 | 263 | #if 0 |
b73bfc1c | 264 | static void |
df7492f9 | 265 | encode_coding_XXX (coding) |
4ed46869 | 266 | struct coding_system *coding; |
4ed46869 | 267 | { |
df7492f9 KH |
268 | int multibytep = coding->dst_multibyte; |
269 | int *charbuf = coding->charbuf; | |
270 | int *charbuf_end = charbuf->charbuf + coding->charbuf_used; | |
271 | unsigned char *dst = coding->destination + coding->produced; | |
272 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
273 | unsigned char *adjusted_dst_end = dst_end - _MAX_BYTES_PRODUCED_IN_LOOP_; | |
274 | int produced_chars = 0; | |
275 | ||
276 | for (; charbuf < charbuf_end && dst < adjusted_dst_end; charbuf++) | |
277 | { | |
278 | int c = *charbuf; | |
279 | /* Encode C into DST, and increment DST. */ | |
280 | } | |
281 | label_no_more_destination: | |
282 | /* How many chars and bytes we produced. */ | |
283 | coding->produced_char += produced_chars; | |
284 | coding->produced = dst - coding->destination; | |
4ed46869 KH |
285 | } |
286 | #endif | |
287 | ||
4ed46869 KH |
288 | \f |
289 | /*** 1. Preamble ***/ | |
290 | ||
68c45bf0 | 291 | #include <config.h> |
4ed46869 KH |
292 | #include <stdio.h> |
293 | ||
4ed46869 KH |
294 | #include "lisp.h" |
295 | #include "buffer.h" | |
df7492f9 | 296 | #include "character.h" |
4ed46869 KH |
297 | #include "charset.h" |
298 | #include "ccl.h" | |
df7492f9 | 299 | #include "composite.h" |
4ed46869 KH |
300 | #include "coding.h" |
301 | #include "window.h" | |
302 | ||
df7492f9 | 303 | Lisp_Object Vcoding_system_hash_table; |
4ed46869 | 304 | |
df7492f9 KH |
305 | Lisp_Object Qcoding_system, Qcoding_aliases, Qeol_type; |
306 | Lisp_Object Qunix, Qdos, Qmac; | |
4ed46869 KH |
307 | Lisp_Object Qbuffer_file_coding_system; |
308 | Lisp_Object Qpost_read_conversion, Qpre_write_conversion; | |
df7492f9 | 309 | Lisp_Object Qdefault_char; |
27901516 | 310 | Lisp_Object Qno_conversion, Qundecided; |
df7492f9 KH |
311 | Lisp_Object Qcharset, Qiso_2022, Qutf_8, Qutf_16, Qshift_jis, Qbig5; |
312 | Lisp_Object Qutf_16_be_nosig, Qutf_16_be, Qutf_16_le_nosig, Qutf_16_le; | |
313 | Lisp_Object Qsignature, Qendian, Qbig, Qlittle; | |
bb0115a2 | 314 | Lisp_Object Qcoding_system_history; |
1397dc18 | 315 | Lisp_Object Qvalid_codes; |
4ed46869 KH |
316 | |
317 | extern Lisp_Object Qinsert_file_contents, Qwrite_region; | |
318 | Lisp_Object Qcall_process, Qcall_process_region, Qprocess_argument; | |
319 | Lisp_Object Qstart_process, Qopen_network_stream; | |
320 | Lisp_Object Qtarget_idx; | |
321 | ||
d46c5b12 KH |
322 | Lisp_Object Vselect_safe_coding_system_function; |
323 | ||
7722baf9 EZ |
324 | /* Mnemonic string for each format of end-of-line. */ |
325 | Lisp_Object eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac; | |
326 | /* Mnemonic string to indicate format of end-of-line is not yet | |
4ed46869 | 327 | decided. */ |
7722baf9 | 328 | Lisp_Object eol_mnemonic_undecided; |
4ed46869 KH |
329 | |
330 | #ifdef emacs | |
331 | ||
4608c386 KH |
332 | Lisp_Object Vcoding_system_list, Vcoding_system_alist; |
333 | ||
334 | Lisp_Object Qcoding_system_p, Qcoding_system_error; | |
4ed46869 | 335 | |
d46c5b12 KH |
336 | /* Coding system emacs-mule and raw-text are for converting only |
337 | end-of-line format. */ | |
338 | Lisp_Object Qemacs_mule, Qraw_text; | |
9ce27fde | 339 | |
4ed46869 KH |
340 | /* Coding-systems are handed between Emacs Lisp programs and C internal |
341 | routines by the following three variables. */ | |
342 | /* Coding-system for reading files and receiving data from process. */ | |
343 | Lisp_Object Vcoding_system_for_read; | |
344 | /* Coding-system for writing files and sending data to process. */ | |
345 | Lisp_Object Vcoding_system_for_write; | |
346 | /* Coding-system actually used in the latest I/O. */ | |
347 | Lisp_Object Vlast_coding_system_used; | |
348 | ||
c4825358 | 349 | /* A vector of length 256 which contains information about special |
94487c4e | 350 | Latin codes (especially for dealing with Microsoft codes). */ |
3f003981 | 351 | Lisp_Object Vlatin_extra_code_table; |
c4825358 | 352 | |
9ce27fde KH |
353 | /* Flag to inhibit code conversion of end-of-line format. */ |
354 | int inhibit_eol_conversion; | |
355 | ||
74383408 KH |
356 | /* Flag to inhibit ISO2022 escape sequence detection. */ |
357 | int inhibit_iso_escape_detection; | |
358 | ||
ed29121d EZ |
359 | /* Flag to make buffer-file-coding-system inherit from process-coding. */ |
360 | int inherit_process_coding_system; | |
361 | ||
c4825358 | 362 | /* Coding system to be used to encode text for terminal display. */ |
4ed46869 KH |
363 | struct coding_system terminal_coding; |
364 | ||
c4825358 KH |
365 | /* Coding system to be used to encode text for terminal display when |
366 | terminal coding system is nil. */ | |
367 | struct coding_system safe_terminal_coding; | |
368 | ||
369 | /* Coding system of what is sent from terminal keyboard. */ | |
4ed46869 KH |
370 | struct coding_system keyboard_coding; |
371 | ||
02ba4723 KH |
372 | Lisp_Object Vfile_coding_system_alist; |
373 | Lisp_Object Vprocess_coding_system_alist; | |
374 | Lisp_Object Vnetwork_coding_system_alist; | |
4ed46869 | 375 | |
68c45bf0 PE |
376 | Lisp_Object Vlocale_coding_system; |
377 | ||
4ed46869 KH |
378 | #endif /* emacs */ |
379 | ||
f967223b KH |
380 | /* Flag to tell if we look up translation table on character code |
381 | conversion. */ | |
84fbb8a0 | 382 | Lisp_Object Venable_character_translation; |
f967223b KH |
383 | /* Standard translation table to look up on decoding (reading). */ |
384 | Lisp_Object Vstandard_translation_table_for_decode; | |
385 | /* Standard translation table to look up on encoding (writing). */ | |
386 | Lisp_Object Vstandard_translation_table_for_encode; | |
84fbb8a0 | 387 | |
f967223b KH |
388 | Lisp_Object Qtranslation_table; |
389 | Lisp_Object Qtranslation_table_id; | |
390 | Lisp_Object Qtranslation_table_for_decode; | |
391 | Lisp_Object Qtranslation_table_for_encode; | |
4ed46869 KH |
392 | |
393 | /* Alist of charsets vs revision number. */ | |
df7492f9 | 394 | static Lisp_Object Vcharset_revision_table; |
4ed46869 | 395 | |
02ba4723 KH |
396 | /* Default coding systems used for process I/O. */ |
397 | Lisp_Object Vdefault_process_coding_system; | |
398 | ||
b843d1ae KH |
399 | /* Global flag to tell that we can't call post-read-conversion and |
400 | pre-write-conversion functions. Usually the value is zero, but it | |
401 | is set to 1 temporarily while such functions are running. This is | |
402 | to avoid infinite recursive call. */ | |
403 | static int inhibit_pre_post_conversion; | |
404 | ||
05e6f5dc KH |
405 | /* Char-table containing safe coding systems of each character. */ |
406 | Lisp_Object Vchar_coding_system_table; | |
407 | Lisp_Object Qchar_coding_system; | |
408 | ||
df7492f9 KH |
409 | /* Two special coding systems. */ |
410 | Lisp_Object Vsjis_coding_system; | |
411 | Lisp_Object Vbig5_coding_system; | |
412 | ||
413 | ||
414 | static int detect_coding_utf_8 P_ ((struct coding_system *, int *)); | |
415 | static void decode_coding_utf_8 P_ ((struct coding_system *)); | |
416 | static int encode_coding_utf_8 P_ ((struct coding_system *)); | |
417 | ||
418 | static int detect_coding_utf_16 P_ ((struct coding_system *, int *)); | |
419 | static void decode_coding_utf_16 P_ ((struct coding_system *)); | |
420 | static int encode_coding_utf_16 P_ ((struct coding_system *)); | |
421 | ||
422 | static int detect_coding_iso_2022 P_ ((struct coding_system *, int *)); | |
423 | static void decode_coding_iso_2022 P_ ((struct coding_system *)); | |
424 | static int encode_coding_iso_2022 P_ ((struct coding_system *)); | |
425 | ||
426 | static int detect_coding_emacs_mule P_ ((struct coding_system *, int *)); | |
427 | static void decode_coding_emacs_mule P_ ((struct coding_system *)); | |
428 | static int encode_coding_emacs_mule P_ ((struct coding_system *)); | |
429 | ||
430 | static int detect_coding_sjis P_ ((struct coding_system *, int *)); | |
431 | static void decode_coding_sjis P_ ((struct coding_system *)); | |
432 | static int encode_coding_sjis P_ ((struct coding_system *)); | |
433 | ||
434 | static int detect_coding_big5 P_ ((struct coding_system *, int *)); | |
435 | static void decode_coding_big5 P_ ((struct coding_system *)); | |
436 | static int encode_coding_big5 P_ ((struct coding_system *)); | |
437 | ||
438 | static int detect_coding_ccl P_ ((struct coding_system *, int *)); | |
439 | static void decode_coding_ccl P_ ((struct coding_system *)); | |
440 | static int encode_coding_ccl P_ ((struct coding_system *)); | |
441 | ||
442 | static void decode_coding_raw_text P_ ((struct coding_system *)); | |
443 | static int encode_coding_raw_text P_ ((struct coding_system *)); | |
444 | ||
445 | ||
446 | /* ISO2022 section */ | |
447 | ||
448 | #define CODING_ISO_INITIAL(coding, reg) \ | |
449 | (XINT (AREF (AREF (CODING_ID_ATTRS ((coding)->id), \ | |
450 | coding_attr_iso_initial), \ | |
451 | reg))) | |
452 | ||
453 | ||
454 | #define CODING_ISO_REQUEST(coding, charset_id) \ | |
455 | ((charset_id <= (coding)->max_charset_id \ | |
456 | ? (coding)->safe_charsets[charset_id] \ | |
457 | : -1)) | |
458 | ||
459 | ||
460 | #define CODING_ISO_FLAGS(coding) \ | |
461 | ((coding)->spec.iso_2022.flags) | |
462 | #define CODING_ISO_DESIGNATION(coding, reg) \ | |
463 | ((coding)->spec.iso_2022.current_designation[reg]) | |
464 | #define CODING_ISO_INVOCATION(coding, plane) \ | |
465 | ((coding)->spec.iso_2022.current_invocation[plane]) | |
466 | #define CODING_ISO_SINGLE_SHIFTING(coding) \ | |
467 | ((coding)->spec.iso_2022.single_shifting) | |
468 | #define CODING_ISO_BOL(coding) \ | |
469 | ((coding)->spec.iso_2022.bol) | |
470 | #define CODING_ISO_INVOKED_CHARSET(coding, plane) \ | |
471 | CODING_ISO_DESIGNATION ((coding), CODING_ISO_INVOCATION ((coding), (plane))) | |
472 | ||
473 | /* Control characters of ISO2022. */ | |
474 | /* code */ /* function */ | |
475 | #define ISO_CODE_LF 0x0A /* line-feed */ | |
476 | #define ISO_CODE_CR 0x0D /* carriage-return */ | |
477 | #define ISO_CODE_SO 0x0E /* shift-out */ | |
478 | #define ISO_CODE_SI 0x0F /* shift-in */ | |
479 | #define ISO_CODE_SS2_7 0x19 /* single-shift-2 for 7-bit code */ | |
480 | #define ISO_CODE_ESC 0x1B /* escape */ | |
481 | #define ISO_CODE_SS2 0x8E /* single-shift-2 */ | |
482 | #define ISO_CODE_SS3 0x8F /* single-shift-3 */ | |
483 | #define ISO_CODE_CSI 0x9B /* control-sequence-introducer */ | |
484 | ||
485 | /* All code (1-byte) of ISO2022 is classified into one of the | |
486 | followings. */ | |
487 | enum iso_code_class_type | |
488 | { | |
489 | ISO_control_0, /* Control codes in the range | |
490 | 0x00..0x1F and 0x7F, except for the | |
491 | following 5 codes. */ | |
492 | ISO_carriage_return, /* ISO_CODE_CR (0x0D) */ | |
493 | ISO_shift_out, /* ISO_CODE_SO (0x0E) */ | |
494 | ISO_shift_in, /* ISO_CODE_SI (0x0F) */ | |
495 | ISO_single_shift_2_7, /* ISO_CODE_SS2_7 (0x19) */ | |
496 | ISO_escape, /* ISO_CODE_SO (0x1B) */ | |
497 | ISO_control_1, /* Control codes in the range | |
498 | 0x80..0x9F, except for the | |
499 | following 3 codes. */ | |
500 | ISO_single_shift_2, /* ISO_CODE_SS2 (0x8E) */ | |
501 | ISO_single_shift_3, /* ISO_CODE_SS3 (0x8F) */ | |
502 | ISO_control_sequence_introducer, /* ISO_CODE_CSI (0x9B) */ | |
503 | ISO_0x20_or_0x7F, /* Codes of the values 0x20 or 0x7F. */ | |
504 | ISO_graphic_plane_0, /* Graphic codes in the range 0x21..0x7E. */ | |
505 | ISO_0xA0_or_0xFF, /* Codes of the values 0xA0 or 0xFF. */ | |
506 | ISO_graphic_plane_1 /* Graphic codes in the range 0xA1..0xFE. */ | |
507 | }; | |
05e6f5dc | 508 | |
df7492f9 KH |
509 | /** The macros CODING_ISO_FLAG_XXX defines a flag bit of the |
510 | `iso-flags' attribute of an iso2022 coding system. */ | |
93dec019 | 511 | |
df7492f9 KH |
512 | /* If set, produce long-form designation sequence (e.g. ESC $ ( A) |
513 | instead of the correct short-form sequence (e.g. ESC $ A). */ | |
514 | #define CODING_ISO_FLAG_LONG_FORM 0x0001 | |
05e6f5dc | 515 | |
df7492f9 KH |
516 | /* If set, reset graphic planes and registers at end-of-line to the |
517 | initial state. */ | |
518 | #define CODING_ISO_FLAG_RESET_AT_EOL 0x0002 | |
05e6f5dc | 519 | |
df7492f9 KH |
520 | /* If set, reset graphic planes and registers before any control |
521 | characters to the initial state. */ | |
522 | #define CODING_ISO_FLAG_RESET_AT_CNTL 0x0004 | |
4ed46869 | 523 | |
df7492f9 KH |
524 | /* If set, encode by 7-bit environment. */ |
525 | #define CODING_ISO_FLAG_SEVEN_BITS 0x0008 | |
b73bfc1c | 526 | |
df7492f9 KH |
527 | /* If set, use locking-shift function. */ |
528 | #define CODING_ISO_FLAG_LOCKING_SHIFT 0x0010 | |
b73bfc1c | 529 | |
df7492f9 KH |
530 | /* If set, use single-shift function. Overwrite |
531 | CODING_ISO_FLAG_LOCKING_SHIFT. */ | |
532 | #define CODING_ISO_FLAG_SINGLE_SHIFT 0x0020 | |
b73bfc1c | 533 | |
df7492f9 KH |
534 | /* If set, use designation escape sequence. */ |
535 | #define CODING_ISO_FLAG_DESIGNATION 0x0040 | |
b73bfc1c | 536 | |
df7492f9 KH |
537 | /* If set, produce revision number sequence. */ |
538 | #define CODING_ISO_FLAG_REVISION 0x0080 | |
f4dee582 | 539 | |
df7492f9 KH |
540 | /* If set, produce ISO6429's direction specifying sequence. */ |
541 | #define CODING_ISO_FLAG_DIRECTION 0x0100 | |
4ed46869 | 542 | |
df7492f9 KH |
543 | /* If set, assume designation states are reset at beginning of line on |
544 | output. */ | |
545 | #define CODING_ISO_FLAG_INIT_AT_BOL 0x0200 | |
aa72b389 | 546 | |
df7492f9 KH |
547 | /* If set, designation sequence should be placed at beginning of line |
548 | on output. */ | |
549 | #define CODING_ISO_FLAG_DESIGNATE_AT_BOL 0x0400 | |
aa72b389 | 550 | |
df7492f9 KH |
551 | /* If set, do not encode unsafe charactes on output. */ |
552 | #define CODING_ISO_FLAG_SAFE 0x0800 | |
aa72b389 | 553 | |
df7492f9 KH |
554 | /* If set, extra latin codes (128..159) are accepted as a valid code |
555 | on input. */ | |
556 | #define CODING_ISO_FLAG_LATIN_EXTRA 0x1000 | |
aa72b389 | 557 | |
df7492f9 | 558 | #define CODING_ISO_FLAG_COMPOSITION 0x2000 |
aa72b389 | 559 | |
df7492f9 | 560 | #define CODING_ISO_FLAG_EUC_TW_SHIFT 0x4000 |
aa72b389 | 561 | |
df7492f9 | 562 | #define CODING_ISO_FLAG_FULL_SUPPORT 0x8000 |
aa72b389 | 563 | |
df7492f9 KH |
564 | /* A character to be produced on output if encoding of the original |
565 | character is prohibited by CODING_ISO_FLAG_SAFE. */ | |
566 | #define CODING_INHIBIT_CHARACTER_SUBSTITUTION '?' | |
aa72b389 | 567 | |
aa72b389 | 568 | |
df7492f9 KH |
569 | /* UTF-16 section */ |
570 | #define CODING_UTF_16_BOM(coding) \ | |
571 | ((coding)->spec.utf_16.bom) | |
4ed46869 | 572 | |
df7492f9 KH |
573 | #define CODING_UTF_16_ENDIAN(coding) \ |
574 | ((coding)->spec.utf_16.endian) | |
4ed46869 | 575 | |
df7492f9 KH |
576 | #define CODING_UTF_16_SURROGATE(coding) \ |
577 | ((coding)->spec.utf_16.surrogate) | |
4ed46869 | 578 | |
4ed46869 | 579 | |
df7492f9 KH |
580 | /* CCL section */ |
581 | #define CODING_CCL_DECODER(coding) \ | |
582 | AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_decoder) | |
583 | #define CODING_CCL_ENCODER(coding) \ | |
584 | AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_encoder) | |
585 | #define CODING_CCL_VALIDS(coding) \ | |
586 | (XSTRING (AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_valids)) \ | |
587 | ->data) | |
4ed46869 | 588 | |
df7492f9 | 589 | /* Index for each coding category in `coding_category_table' */ |
4ed46869 | 590 | |
df7492f9 KH |
591 | enum coding_category |
592 | { | |
593 | coding_category_iso_7, | |
594 | coding_category_iso_7_tight, | |
595 | coding_category_iso_8_1, | |
596 | coding_category_iso_8_2, | |
597 | coding_category_iso_7_else, | |
598 | coding_category_iso_8_else, | |
599 | coding_category_utf_8, | |
600 | coding_category_utf_16_auto, | |
601 | coding_category_utf_16_be, | |
602 | coding_category_utf_16_le, | |
603 | coding_category_utf_16_be_nosig, | |
604 | coding_category_utf_16_le_nosig, | |
605 | coding_category_charset, | |
606 | coding_category_sjis, | |
607 | coding_category_big5, | |
608 | coding_category_ccl, | |
609 | coding_category_emacs_mule, | |
610 | /* All above are targets of code detection. */ | |
611 | coding_category_raw_text, | |
612 | coding_category_undecided, | |
613 | coding_category_max | |
614 | }; | |
615 | ||
616 | /* Definitions of flag bits used in detect_coding_XXXX. */ | |
617 | #define CATEGORY_MASK_ISO_7 (1 << coding_category_iso_7) | |
618 | #define CATEGORY_MASK_ISO_7_TIGHT (1 << coding_category_iso_7_tight) | |
619 | #define CATEGORY_MASK_ISO_8_1 (1 << coding_category_iso_8_1) | |
620 | #define CATEGORY_MASK_ISO_8_2 (1 << coding_category_iso_8_2) | |
621 | #define CATEGORY_MASK_ISO_7_ELSE (1 << coding_category_iso_7_else) | |
622 | #define CATEGORY_MASK_ISO_8_ELSE (1 << coding_category_iso_8_else) | |
623 | #define CATEGORY_MASK_UTF_8 (1 << coding_category_utf_8) | |
624 | #define CATEGORY_MASK_UTF_16_BE (1 << coding_category_utf_16_be) | |
625 | #define CATEGORY_MASK_UTF_16_LE (1 << coding_category_utf_16_le) | |
626 | #define CATEGORY_MASK_UTF_16_BE_NOSIG (1 << coding_category_utf_16_be_nosig) | |
627 | #define CATEGORY_MASK_UTF_16_LE_NOSIG (1 << coding_category_utf_16_le_nosig) | |
628 | #define CATEGORY_MASK_CHARSET (1 << coding_category_charset) | |
629 | #define CATEGORY_MASK_SJIS (1 << coding_category_sjis) | |
630 | #define CATEGORY_MASK_BIG5 (1 << coding_category_big5) | |
631 | #define CATEGORY_MASK_CCL (1 << coding_category_ccl) | |
632 | #define CATEGORY_MASK_EMACS_MULE (1 << coding_category_emacs_mule) | |
633 | ||
634 | /* This value is returned if detect_coding_mask () find nothing other | |
635 | than ASCII characters. */ | |
636 | #define CATEGORY_MASK_ANY \ | |
637 | (CATEGORY_MASK_ISO_7 \ | |
638 | | CATEGORY_MASK_ISO_7_TIGHT \ | |
639 | | CATEGORY_MASK_ISO_8_1 \ | |
640 | | CATEGORY_MASK_ISO_8_2 \ | |
641 | | CATEGORY_MASK_ISO_7_ELSE \ | |
642 | | CATEGORY_MASK_ISO_8_ELSE \ | |
643 | | CATEGORY_MASK_UTF_8 \ | |
644 | | CATEGORY_MASK_UTF_16_BE \ | |
645 | | CATEGORY_MASK_UTF_16_LE \ | |
646 | | CATEGORY_MASK_UTF_16_BE_NOSIG \ | |
647 | | CATEGORY_MASK_UTF_16_LE_NOSIG \ | |
648 | | CATEGORY_MASK_CHARSET \ | |
649 | | CATEGORY_MASK_SJIS \ | |
650 | | CATEGORY_MASK_BIG5 \ | |
651 | | CATEGORY_MASK_CCL \ | |
652 | | CATEGORY_MASK_EMACS_MULE) | |
653 | ||
654 | ||
655 | #define CATEGORY_MASK_ISO_7BIT \ | |
656 | (CATEGORY_MASK_ISO_7 | CATEGORY_MASK_ISO_7_TIGHT) | |
657 | ||
658 | #define CATEGORY_MASK_ISO_8BIT \ | |
659 | (CATEGORY_MASK_ISO_8_1 | CATEGORY_MASK_ISO_8_2) | |
660 | ||
661 | #define CATEGORY_MASK_ISO_ELSE \ | |
662 | (CATEGORY_MASK_ISO_7_ELSE | CATEGORY_MASK_ISO_8_ELSE) | |
663 | ||
664 | #define CATEGORY_MASK_ISO_ESCAPE \ | |
665 | (CATEGORY_MASK_ISO_7 \ | |
666 | | CATEGORY_MASK_ISO_7_TIGHT \ | |
667 | | CATEGORY_MASK_ISO_7_ELSE \ | |
668 | | CATEGORY_MASK_ISO_8_ELSE) | |
669 | ||
670 | #define CATEGORY_MASK_ISO \ | |
671 | ( CATEGORY_MASK_ISO_7BIT \ | |
672 | | CATEGORY_MASK_ISO_8BIT \ | |
673 | | CATEGORY_MASK_ISO_ELSE) | |
674 | ||
675 | #define CATEGORY_MASK_UTF_16 \ | |
676 | (CATEGORY_MASK_UTF_16_BE \ | |
677 | | CATEGORY_MASK_UTF_16_LE \ | |
678 | | CATEGORY_MASK_UTF_16_BE_NOSIG \ | |
679 | | CATEGORY_MASK_UTF_16_LE_NOSIG) | |
680 | ||
681 | ||
682 | /* List of symbols `coding-category-xxx' ordered by priority. This | |
683 | variable is exposed to Emacs Lisp. */ | |
684 | static Lisp_Object Vcoding_category_list; | |
685 | ||
686 | /* Table of coding categories (Lisp symbols). This variable is for | |
687 | internal use oly. */ | |
688 | static Lisp_Object Vcoding_category_table; | |
689 | ||
690 | /* Table of coding-categories ordered by priority. */ | |
691 | static enum coding_category coding_priorities[coding_category_max]; | |
692 | ||
693 | /* Nth element is a coding context for the coding system bound to the | |
694 | Nth coding category. */ | |
695 | static struct coding_system coding_categories[coding_category_max]; | |
696 | ||
697 | static int detected_mask[coding_category_raw_text] = | |
698 | { CATEGORY_MASK_ISO, | |
699 | CATEGORY_MASK_ISO, | |
700 | CATEGORY_MASK_ISO, | |
701 | CATEGORY_MASK_ISO, | |
702 | CATEGORY_MASK_ISO, | |
703 | CATEGORY_MASK_ISO, | |
704 | CATEGORY_MASK_UTF_8, | |
705 | CATEGORY_MASK_UTF_16, | |
706 | CATEGORY_MASK_UTF_16, | |
707 | CATEGORY_MASK_UTF_16, | |
708 | CATEGORY_MASK_UTF_16, | |
709 | CATEGORY_MASK_UTF_16, | |
710 | CATEGORY_MASK_CHARSET, | |
711 | CATEGORY_MASK_SJIS, | |
712 | CATEGORY_MASK_BIG5, | |
713 | CATEGORY_MASK_CCL, | |
714 | CATEGORY_MASK_EMACS_MULE | |
715 | }; | |
716 | ||
717 | /*** Commonly used macros and functions ***/ | |
718 | ||
719 | #ifndef min | |
720 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
721 | #endif | |
722 | #ifndef max | |
723 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
724 | #endif | |
4ed46869 | 725 | |
df7492f9 KH |
726 | #define CODING_GET_INFO(coding, attrs, eol_type, charset_list) \ |
727 | do { \ | |
728 | attrs = CODING_ID_ATTRS (coding->id); \ | |
729 | eol_type = CODING_ID_EOL_TYPE (coding->id); \ | |
730 | if (VECTORP (eol_type)) \ | |
731 | eol_type = Qunix; \ | |
732 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); \ | |
733 | } while (0) | |
4ed46869 | 734 | |
4ed46869 | 735 | |
df7492f9 KH |
736 | /* Safely get one byte from the source text pointed by SRC which ends |
737 | at SRC_END, and set C to that byte. If there are not enough bytes | |
738 | in the source, it jumps to `no_more_source'. The caller | |
739 | should declare and set these variables appropriately in advance: | |
740 | src, src_end, multibytep | |
741 | */ | |
aa72b389 | 742 | |
df7492f9 | 743 | #define ONE_MORE_BYTE(c) \ |
aa72b389 | 744 | do { \ |
df7492f9 KH |
745 | if (src == src_end) \ |
746 | { \ | |
747 | if (src_base < src) \ | |
748 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; \ | |
749 | goto no_more_source; \ | |
750 | } \ | |
751 | c = *src++; \ | |
752 | if (multibytep && (c & 0x80)) \ | |
753 | { \ | |
754 | if ((c & 0xFE) != 0xC0) \ | |
755 | error ("Undecodable char found"); \ | |
756 | c = ((c & 1) << 6) | *src++; \ | |
757 | } \ | |
758 | consumed_chars++; \ | |
aa72b389 KH |
759 | } while (0) |
760 | ||
aa72b389 | 761 | |
df7492f9 KH |
762 | #define ONE_MORE_BYTE_NO_CHECK(c) \ |
763 | do { \ | |
764 | c = *src++; \ | |
765 | if (multibytep && (c & 0x80)) \ | |
766 | { \ | |
767 | if ((c & 0xFE) != 0xC0) \ | |
768 | error ("Undecodable char found"); \ | |
769 | c = ((c & 1) << 6) | *src++; \ | |
770 | } \ | |
aa72b389 KH |
771 | } while (0) |
772 | ||
aa72b389 | 773 | |
df7492f9 KH |
774 | /* Store a byte C in the place pointed by DST and increment DST to the |
775 | next free point, and increment PRODUCED_CHARS. The caller should | |
776 | assure that C is 0..127, and declare and set the variable `dst' | |
777 | appropriately in advance. | |
778 | */ | |
aa72b389 KH |
779 | |
780 | ||
df7492f9 KH |
781 | #define EMIT_ONE_ASCII_BYTE(c) \ |
782 | do { \ | |
783 | produced_chars++; \ | |
784 | *dst++ = (c); \ | |
785 | } while (0) | |
aa72b389 | 786 | |
aa72b389 | 787 | |
df7492f9 | 788 | /* Like EMIT_ONE_ASCII_BYTE byt store two bytes; C1 and C2. */ |
aa72b389 | 789 | |
df7492f9 KH |
790 | #define EMIT_TWO_ASCII_BYTES(c1, c2) \ |
791 | do { \ | |
792 | produced_chars += 2; \ | |
793 | *dst++ = (c1), *dst++ = (c2); \ | |
794 | } while (0) | |
aa72b389 | 795 | |
df7492f9 KH |
796 | |
797 | /* Store a byte C in the place pointed by DST and increment DST to the | |
798 | next free point, and increment PRODUCED_CHARS. If MULTIBYTEP is | |
799 | nonzero, store in an appropriate multibyte from. The caller should | |
800 | declare and set the variables `dst' and `multibytep' appropriately | |
801 | in advance. */ | |
802 | ||
803 | #define EMIT_ONE_BYTE(c) \ | |
804 | do { \ | |
805 | produced_chars++; \ | |
806 | if (multibytep) \ | |
807 | { \ | |
808 | int ch = (c); \ | |
809 | if (ch >= 0x80) \ | |
810 | ch = BYTE8_TO_CHAR (ch); \ | |
811 | CHAR_STRING_ADVANCE (ch, dst); \ | |
812 | } \ | |
813 | else \ | |
814 | *dst++ = (c); \ | |
aa72b389 KH |
815 | } while (0) |
816 | ||
817 | ||
df7492f9 | 818 | /* Like EMIT_ONE_BYTE, but emit two bytes; C1 and C2. */ |
aa72b389 | 819 | |
e19c3639 KH |
820 | #define EMIT_TWO_BYTES(c1, c2) \ |
821 | do { \ | |
822 | produced_chars += 2; \ | |
823 | if (multibytep) \ | |
824 | { \ | |
825 | int ch; \ | |
826 | \ | |
827 | ch = (c1); \ | |
828 | if (ch >= 0x80) \ | |
829 | ch = BYTE8_TO_CHAR (ch); \ | |
830 | CHAR_STRING_ADVANCE (ch, dst); \ | |
831 | ch = (c2); \ | |
832 | if (ch >= 0x80) \ | |
833 | ch = BYTE8_TO_CHAR (ch); \ | |
834 | CHAR_STRING_ADVANCE (ch, dst); \ | |
835 | } \ | |
836 | else \ | |
837 | { \ | |
838 | *dst++ = (c1); \ | |
839 | *dst++ = (c2); \ | |
840 | } \ | |
aa72b389 KH |
841 | } while (0) |
842 | ||
843 | ||
df7492f9 KH |
844 | #define EMIT_THREE_BYTES(c1, c2, c3) \ |
845 | do { \ | |
846 | EMIT_ONE_BYTE (c1); \ | |
847 | EMIT_TWO_BYTES (c2, c3); \ | |
848 | } while (0) | |
aa72b389 | 849 | |
aa72b389 | 850 | |
df7492f9 KH |
851 | #define EMIT_FOUR_BYTES(c1, c2, c3, c4) \ |
852 | do { \ | |
853 | EMIT_TWO_BYTES (c1, c2); \ | |
854 | EMIT_TWO_BYTES (c3, c4); \ | |
855 | } while (0) | |
aa72b389 | 856 | |
aa72b389 | 857 | |
df7492f9 KH |
858 | #define CODING_DECODE_CHAR(coding, src, src_base, src_end, charset, code, c) \ |
859 | do { \ | |
860 | charset_map_loaded = 0; \ | |
861 | c = DECODE_CHAR (charset, code); \ | |
862 | if (charset_map_loaded) \ | |
863 | { \ | |
864 | unsigned char *orig = coding->source; \ | |
865 | EMACS_INT offset; \ | |
866 | \ | |
867 | coding_set_source (coding); \ | |
868 | offset = coding->source - orig; \ | |
869 | src += offset; \ | |
870 | src_base += offset; \ | |
871 | src_end += offset; \ | |
872 | } \ | |
873 | } while (0) | |
aa72b389 | 874 | |
aa72b389 | 875 | |
df7492f9 KH |
876 | #define ASSURE_DESTINATION(bytes) \ |
877 | do { \ | |
878 | if (dst + (bytes) >= dst_end) \ | |
879 | { \ | |
880 | int more_bytes = charbuf_end - charbuf + (bytes); \ | |
881 | \ | |
882 | dst = alloc_destination (coding, more_bytes, dst); \ | |
883 | dst_end = coding->destination + coding->dst_bytes; \ | |
884 | } \ | |
885 | } while (0) | |
b1887814 | 886 | |
df7492f9 KH |
887 | |
888 | ||
889 | static void | |
890 | coding_set_source (coding) | |
891 | struct coding_system *coding; | |
892 | { | |
893 | if (BUFFERP (coding->src_object)) | |
894 | { | |
895 | if (coding->src_pos < 0) | |
896 | coding->source = GAP_END_ADDR + coding->src_pos_byte; | |
897 | else | |
898 | { | |
e19c3639 KH |
899 | struct buffer *buf = XBUFFER (coding->src_object); |
900 | EMACS_INT beg_byte = BUF_BEG_BYTE (buf); | |
901 | EMACS_INT gpt_byte = BUF_GPT_BYTE (buf); | |
902 | unsigned char *beg_addr = BUF_BEG_ADDR (buf); | |
903 | ||
904 | coding->source = beg_addr + coding->src_pos_byte - 1; | |
905 | if (coding->src_pos_byte >= gpt_byte) | |
906 | coding->source += BUF_GAP_SIZE (buf); | |
aa72b389 KH |
907 | } |
908 | } | |
df7492f9 | 909 | else if (STRINGP (coding->src_object)) |
aa72b389 | 910 | { |
df7492f9 KH |
911 | coding->source = (XSTRING (coding->src_object)->data |
912 | + coding->src_pos_byte); | |
913 | } | |
914 | else | |
915 | /* Otherwise, the source is C string and is never relocated | |
916 | automatically. Thus we don't have to update anything. */ | |
917 | ; | |
918 | } | |
919 | ||
920 | static void | |
921 | coding_set_destination (coding) | |
922 | struct coding_system *coding; | |
923 | { | |
924 | if (BUFFERP (coding->dst_object)) | |
925 | { | |
926 | /* We are sure that coding->dst_pos_byte is before the gap of the | |
927 | buffer. */ | |
928 | coding->destination = (BUF_BEG_ADDR (XBUFFER (coding->dst_object)) | |
929 | + coding->dst_pos_byte - 1); | |
930 | if (coding->src_pos < 0) | |
df7492f9 KH |
931 | coding->dst_bytes = (GAP_END_ADDR |
932 | - (coding->src_bytes - coding->consumed) | |
933 | - coding->destination); | |
934 | else | |
935 | coding->dst_bytes = (BUF_GAP_END_ADDR (XBUFFER (coding->dst_object)) | |
936 | - coding->destination); | |
937 | } | |
938 | else | |
939 | /* Otherwise, the destination is C string and is never relocated | |
940 | automatically. Thus we don't have to update anything. */ | |
941 | ; | |
942 | } | |
943 | ||
944 | ||
945 | static void | |
946 | coding_alloc_by_realloc (coding, bytes) | |
947 | struct coding_system *coding; | |
948 | EMACS_INT bytes; | |
949 | { | |
950 | coding->destination = (unsigned char *) xrealloc (coding->destination, | |
951 | coding->dst_bytes + bytes); | |
952 | coding->dst_bytes += bytes; | |
953 | } | |
954 | ||
955 | static void | |
956 | coding_alloc_by_making_gap (coding, bytes) | |
957 | struct coding_system *coding; | |
958 | EMACS_INT bytes; | |
959 | { | |
2c78b7e1 KH |
960 | if (BUFFERP (coding->dst_object) |
961 | && EQ (coding->src_object, coding->dst_object)) | |
df7492f9 KH |
962 | { |
963 | EMACS_INT add = coding->src_bytes - coding->consumed; | |
964 | ||
965 | GAP_SIZE -= add; ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
966 | make_gap (bytes); | |
967 | GAP_SIZE += add; ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
968 | } | |
969 | else | |
970 | { | |
2c78b7e1 KH |
971 | Lisp_Object this_buffer; |
972 | ||
973 | this_buffer = Fcurrent_buffer (); | |
df7492f9 KH |
974 | set_buffer_internal (XBUFFER (coding->dst_object)); |
975 | make_gap (bytes); | |
976 | set_buffer_internal (XBUFFER (this_buffer)); | |
977 | } | |
978 | } | |
979 | ||
980 | ||
981 | static unsigned char * | |
982 | alloc_destination (coding, nbytes, dst) | |
983 | struct coding_system *coding; | |
984 | int nbytes; | |
985 | unsigned char *dst; | |
986 | { | |
987 | EMACS_INT offset = dst - coding->destination; | |
988 | ||
989 | if (BUFFERP (coding->dst_object)) | |
990 | coding_alloc_by_making_gap (coding, nbytes); | |
991 | else | |
992 | coding_alloc_by_realloc (coding, nbytes); | |
993 | coding->result = CODING_RESULT_SUCCESS; | |
994 | coding_set_destination (coding); | |
995 | dst = coding->destination + offset; | |
996 | return dst; | |
997 | } | |
aa72b389 | 998 | |
df7492f9 KH |
999 | \f |
1000 | /*** 2. Emacs' internal format (emacs-utf-8) ***/ | |
1001 | ||
1002 | ||
1003 | ||
1004 | \f | |
1005 | /*** 3. UTF-8 ***/ | |
1006 | ||
1007 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
1008 | Check if a text is encoded in UTF-8. If it is, return | |
1009 | CATEGORY_MASK_UTF_8, else return 0. */ | |
1010 | ||
1011 | #define UTF_8_1_OCTET_P(c) ((c) < 0x80) | |
1012 | #define UTF_8_EXTRA_OCTET_P(c) (((c) & 0xC0) == 0x80) | |
1013 | #define UTF_8_2_OCTET_LEADING_P(c) (((c) & 0xE0) == 0xC0) | |
1014 | #define UTF_8_3_OCTET_LEADING_P(c) (((c) & 0xF0) == 0xE0) | |
1015 | #define UTF_8_4_OCTET_LEADING_P(c) (((c) & 0xF8) == 0xF0) | |
1016 | #define UTF_8_5_OCTET_LEADING_P(c) (((c) & 0xFC) == 0xF8) | |
1017 | ||
1018 | static int | |
1019 | detect_coding_utf_8 (coding, mask) | |
1020 | struct coding_system *coding; | |
1021 | int *mask; | |
1022 | { | |
1023 | unsigned char *src = coding->source, *src_base = src; | |
1024 | unsigned char *src_end = coding->source + coding->src_bytes; | |
1025 | int multibytep = coding->src_multibyte; | |
1026 | int consumed_chars = 0; | |
1027 | int found = 0; | |
1028 | ||
1029 | /* A coding system of this category is always ASCII compatible. */ | |
1030 | src += coding->head_ascii; | |
1031 | ||
1032 | while (1) | |
1033 | { | |
1034 | int c, c1, c2, c3, c4; | |
1035 | ||
1036 | ONE_MORE_BYTE (c); | |
1037 | if (UTF_8_1_OCTET_P (c)) | |
1038 | continue; | |
1039 | ONE_MORE_BYTE (c1); | |
1040 | if (! UTF_8_EXTRA_OCTET_P (c1)) | |
1041 | break; | |
1042 | if (UTF_8_2_OCTET_LEADING_P (c)) | |
1043 | { | |
1044 | found++; | |
1045 | continue; | |
1046 | } | |
1047 | ONE_MORE_BYTE (c2); | |
1048 | if (! UTF_8_EXTRA_OCTET_P (c2)) | |
1049 | break; | |
1050 | if (UTF_8_3_OCTET_LEADING_P (c)) | |
1051 | { | |
1052 | found++; | |
1053 | continue; | |
1054 | } | |
1055 | ONE_MORE_BYTE (c3); | |
1056 | if (! UTF_8_EXTRA_OCTET_P (c3)) | |
1057 | break; | |
1058 | if (UTF_8_4_OCTET_LEADING_P (c)) | |
aa72b389 | 1059 | { |
df7492f9 KH |
1060 | found++; |
1061 | continue; | |
1062 | } | |
1063 | ONE_MORE_BYTE (c4); | |
1064 | if (! UTF_8_EXTRA_OCTET_P (c4)) | |
1065 | break; | |
1066 | if (UTF_8_5_OCTET_LEADING_P (c)) | |
1067 | { | |
1068 | found++; | |
1069 | continue; | |
1070 | } | |
1071 | break; | |
1072 | } | |
1073 | *mask &= ~CATEGORY_MASK_UTF_8; | |
1074 | return 0; | |
1075 | ||
1076 | no_more_source: | |
1077 | if (! found) | |
1078 | return 0; | |
1079 | *mask &= CATEGORY_MASK_UTF_8; | |
1080 | return 1; | |
1081 | } | |
1082 | ||
1083 | ||
1084 | static void | |
1085 | decode_coding_utf_8 (coding) | |
1086 | struct coding_system *coding; | |
1087 | { | |
1088 | unsigned char *src = coding->source + coding->consumed; | |
1089 | unsigned char *src_end = coding->source + coding->src_bytes; | |
1090 | unsigned char *src_base; | |
1091 | int *charbuf = coding->charbuf; | |
1092 | int *charbuf_end = charbuf + coding->charbuf_size; | |
1093 | int consumed_chars = 0, consumed_chars_base; | |
1094 | int multibytep = coding->src_multibyte; | |
1095 | Lisp_Object attr, eol_type, charset_list; | |
1096 | ||
1097 | CODING_GET_INFO (coding, attr, eol_type, charset_list); | |
1098 | ||
1099 | while (1) | |
1100 | { | |
1101 | int c, c1, c2, c3, c4, c5; | |
1102 | ||
1103 | src_base = src; | |
1104 | consumed_chars_base = consumed_chars; | |
1105 | ||
1106 | if (charbuf >= charbuf_end) | |
1107 | break; | |
1108 | ||
1109 | ONE_MORE_BYTE (c1); | |
1110 | if (UTF_8_1_OCTET_P(c1)) | |
1111 | { | |
1112 | c = c1; | |
1113 | if (c == '\r') | |
aa72b389 | 1114 | { |
df7492f9 KH |
1115 | if (EQ (eol_type, Qdos)) |
1116 | { | |
1117 | if (src == src_end) | |
1118 | goto no_more_source; | |
1119 | if (*src == '\n') | |
1120 | ONE_MORE_BYTE (c); | |
1121 | } | |
1122 | else if (EQ (eol_type, Qmac)) | |
1123 | c = '\n'; | |
aa72b389 | 1124 | } |
aa72b389 | 1125 | } |
df7492f9 | 1126 | else |
aa72b389 | 1127 | { |
df7492f9 KH |
1128 | ONE_MORE_BYTE (c2); |
1129 | if (! UTF_8_EXTRA_OCTET_P (c2)) | |
1130 | goto invalid_code; | |
1131 | if (UTF_8_2_OCTET_LEADING_P (c1)) | |
1132 | c = ((c1 & 0x1F) << 6) | (c2 & 0x3F); | |
1133 | else | |
aa72b389 | 1134 | { |
df7492f9 KH |
1135 | ONE_MORE_BYTE (c3); |
1136 | if (! UTF_8_EXTRA_OCTET_P (c3)) | |
1137 | goto invalid_code; | |
1138 | if (UTF_8_3_OCTET_LEADING_P (c1)) | |
1139 | c = (((c1 & 0xF) << 12) | |
1140 | | ((c2 & 0x3F) << 6) | (c3 & 0x3F)); | |
1141 | else | |
1142 | { | |
1143 | ONE_MORE_BYTE (c4); | |
1144 | if (! UTF_8_EXTRA_OCTET_P (c4)) | |
1145 | goto invalid_code; | |
1146 | if (UTF_8_4_OCTET_LEADING_P (c1)) | |
1147 | c = (((c1 & 0x7) << 18) | ((c2 & 0x3F) << 12) | |
1148 | | ((c3 & 0x3F) << 6) | (c4 & 0x3F)); | |
1149 | else | |
1150 | { | |
1151 | ONE_MORE_BYTE (c5); | |
1152 | if (! UTF_8_EXTRA_OCTET_P (c5)) | |
1153 | goto invalid_code; | |
1154 | if (UTF_8_5_OCTET_LEADING_P (c1)) | |
1155 | { | |
1156 | c = (((c1 & 0x3) << 24) | ((c2 & 0x3F) << 18) | |
1157 | | ((c3 & 0x3F) << 12) | ((c4 & 0x3F) << 6) | |
1158 | | (c5 & 0x3F)); | |
1159 | if (c > MAX_CHAR) | |
1160 | goto invalid_code; | |
1161 | } | |
1162 | else | |
1163 | goto invalid_code; | |
1164 | } | |
1165 | } | |
aa72b389 | 1166 | } |
aa72b389 | 1167 | } |
df7492f9 KH |
1168 | |
1169 | *charbuf++ = c; | |
1170 | continue; | |
1171 | ||
1172 | invalid_code: | |
1173 | src = src_base; | |
1174 | consumed_chars = consumed_chars_base; | |
1175 | ONE_MORE_BYTE (c); | |
1176 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
1177 | coding->errors++; | |
aa72b389 KH |
1178 | } |
1179 | ||
df7492f9 KH |
1180 | no_more_source: |
1181 | coding->consumed_char += consumed_chars_base; | |
1182 | coding->consumed = src_base - coding->source; | |
1183 | coding->charbuf_used = charbuf - coding->charbuf; | |
1184 | } | |
1185 | ||
1186 | ||
1187 | static int | |
1188 | encode_coding_utf_8 (coding) | |
1189 | struct coding_system *coding; | |
1190 | { | |
1191 | int multibytep = coding->dst_multibyte; | |
1192 | int *charbuf = coding->charbuf; | |
1193 | int *charbuf_end = charbuf + coding->charbuf_used; | |
1194 | unsigned char *dst = coding->destination + coding->produced; | |
1195 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
e19c3639 | 1196 | int produced_chars = 0; |
df7492f9 KH |
1197 | int c; |
1198 | ||
1199 | if (multibytep) | |
aa72b389 | 1200 | { |
df7492f9 KH |
1201 | int safe_room = MAX_MULTIBYTE_LENGTH * 2; |
1202 | ||
1203 | while (charbuf < charbuf_end) | |
aa72b389 | 1204 | { |
df7492f9 KH |
1205 | unsigned char str[MAX_MULTIBYTE_LENGTH], *p, *pend = str; |
1206 | ||
1207 | ASSURE_DESTINATION (safe_room); | |
1208 | c = *charbuf++; | |
1209 | CHAR_STRING_ADVANCE (c, pend); | |
1210 | for (p = str; p < pend; p++) | |
1211 | EMIT_ONE_BYTE (*p); | |
aa72b389 | 1212 | } |
aa72b389 | 1213 | } |
df7492f9 KH |
1214 | else |
1215 | { | |
1216 | int safe_room = MAX_MULTIBYTE_LENGTH; | |
1217 | ||
1218 | while (charbuf < charbuf_end) | |
1219 | { | |
1220 | ASSURE_DESTINATION (safe_room); | |
1221 | c = *charbuf++; | |
1222 | dst += CHAR_STRING (c, dst); | |
1223 | produced_chars++; | |
1224 | } | |
1225 | } | |
1226 | coding->result = CODING_RESULT_SUCCESS; | |
1227 | coding->produced_char += produced_chars; | |
1228 | coding->produced = dst - coding->destination; | |
1229 | return 0; | |
aa72b389 KH |
1230 | } |
1231 | ||
4ed46869 | 1232 | |
df7492f9 KH |
1233 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
1234 | Check if a text is encoded in UTF-16 Big Endian (endian == 1) or | |
1235 | Little Endian (otherwise). If it is, return | |
1236 | CATEGORY_MASK_UTF_16_BE or CATEGORY_MASK_UTF_16_LE, | |
1237 | else return 0. */ | |
1238 | ||
1239 | #define UTF_16_HIGH_SURROGATE_P(val) \ | |
1240 | (((val) & 0xFC00) == 0xD800) | |
1241 | ||
1242 | #define UTF_16_LOW_SURROGATE_P(val) \ | |
1243 | (((val) & 0xFC00) == 0xDC00) | |
1244 | ||
1245 | #define UTF_16_INVALID_P(val) \ | |
1246 | (((val) == 0xFFFE) \ | |
1247 | || ((val) == 0xFFFF) \ | |
1248 | || UTF_16_LOW_SURROGATE_P (val)) | |
1249 | ||
1250 | ||
1251 | static int | |
1252 | detect_coding_utf_16 (coding, mask) | |
b73bfc1c | 1253 | struct coding_system *coding; |
df7492f9 | 1254 | int *mask; |
b73bfc1c | 1255 | { |
df7492f9 KH |
1256 | unsigned char *src = coding->source, *src_base = src; |
1257 | unsigned char *src_end = coding->source + coding->src_bytes; | |
1258 | int multibytep = coding->src_multibyte; | |
1259 | int consumed_chars = 0; | |
1260 | int c1, c2; | |
1261 | ||
1262 | ONE_MORE_BYTE (c1); | |
1263 | ONE_MORE_BYTE (c2); | |
4ed46869 | 1264 | |
df7492f9 | 1265 | if ((c1 == 0xFF) && (c2 == 0xFE)) |
b73bfc1c | 1266 | { |
df7492f9 KH |
1267 | *mask &= CATEGORY_MASK_UTF_16_LE; |
1268 | return 1; | |
1269 | } | |
1270 | else if ((c1 == 0xFE) && (c2 == 0xFF)) | |
1271 | { | |
1272 | *mask &= CATEGORY_MASK_UTF_16_BE; | |
1273 | return 1; | |
1274 | } | |
1275 | no_more_source: | |
1276 | return 0; | |
1277 | } | |
ec6d2bb8 | 1278 | |
df7492f9 KH |
1279 | static void |
1280 | decode_coding_utf_16 (coding) | |
1281 | struct coding_system *coding; | |
1282 | { | |
1283 | unsigned char *src = coding->source + coding->consumed; | |
1284 | unsigned char *src_end = coding->source + coding->src_bytes; | |
0be8721c | 1285 | unsigned char *src_base; |
df7492f9 KH |
1286 | int *charbuf = coding->charbuf; |
1287 | int *charbuf_end = charbuf + coding->charbuf_size; | |
1288 | int consumed_chars = 0, consumed_chars_base; | |
1289 | int multibytep = coding->src_multibyte; | |
1290 | enum utf_16_bom_type bom = CODING_UTF_16_BOM (coding); | |
1291 | enum utf_16_endian_type endian = CODING_UTF_16_ENDIAN (coding); | |
1292 | int surrogate = CODING_UTF_16_SURROGATE (coding); | |
1293 | Lisp_Object attr, eol_type, charset_list; | |
1294 | ||
1295 | CODING_GET_INFO (coding, attr, eol_type, charset_list); | |
1296 | ||
1297 | if (bom != utf_16_without_bom) | |
1298 | { | |
1299 | int c, c1, c2; | |
4af310db | 1300 | |
df7492f9 KH |
1301 | src_base = src; |
1302 | ONE_MORE_BYTE (c1); | |
1303 | ONE_MORE_BYTE (c2); | |
e19c3639 | 1304 | c = (c1 << 8) | c2; |
df7492f9 KH |
1305 | if (bom == utf_16_with_bom) |
1306 | { | |
1307 | if (endian == utf_16_big_endian | |
1308 | ? c != 0xFFFE : c != 0xFEFF) | |
4af310db | 1309 | { |
df7492f9 KH |
1310 | /* We are sure that there's enouph room at CHARBUF. */ |
1311 | *charbuf++ = c1; | |
1312 | *charbuf++ = c2; | |
1313 | coding->errors++; | |
4af310db | 1314 | } |
4af310db | 1315 | } |
df7492f9 | 1316 | else |
4af310db | 1317 | { |
df7492f9 KH |
1318 | if (c == 0xFFFE) |
1319 | CODING_UTF_16_ENDIAN (coding) | |
1320 | = endian = utf_16_big_endian; | |
1321 | else if (c == 0xFEFF) | |
1322 | CODING_UTF_16_ENDIAN (coding) | |
1323 | = endian = utf_16_little_endian; | |
1324 | else | |
4af310db | 1325 | { |
df7492f9 KH |
1326 | CODING_UTF_16_ENDIAN (coding) |
1327 | = endian = utf_16_big_endian; | |
1328 | src = src_base; | |
4af310db | 1329 | } |
4af310db | 1330 | } |
df7492f9 KH |
1331 | CODING_UTF_16_BOM (coding) = utf_16_with_bom; |
1332 | } | |
1333 | ||
1334 | while (1) | |
1335 | { | |
1336 | int c, c1, c2; | |
1337 | ||
1338 | src_base = src; | |
1339 | consumed_chars_base = consumed_chars; | |
1340 | ||
1341 | if (charbuf + 2 >= charbuf_end) | |
1342 | break; | |
1343 | ||
1344 | ONE_MORE_BYTE (c1); | |
1345 | ONE_MORE_BYTE (c2); | |
1346 | c = (endian == utf_16_big_endian | |
e19c3639 | 1347 | ? ((c1 << 8) | c2) : ((c2 << 8) | c1)); |
df7492f9 | 1348 | if (surrogate) |
aa72b389 | 1349 | { |
df7492f9 | 1350 | if (! UTF_16_LOW_SURROGATE_P (c)) |
aa72b389 | 1351 | { |
df7492f9 KH |
1352 | if (endian == utf_16_big_endian) |
1353 | c1 = surrogate >> 8, c2 = surrogate & 0xFF; | |
1354 | else | |
1355 | c1 = surrogate & 0xFF, c2 = surrogate >> 8; | |
1356 | *charbuf++ = c1; | |
1357 | *charbuf++ = c2; | |
1358 | coding->errors++; | |
1359 | if (UTF_16_HIGH_SURROGATE_P (c)) | |
1360 | CODING_UTF_16_SURROGATE (coding) = surrogate = c; | |
1361 | else | |
1362 | *charbuf++ = c; | |
aa72b389 | 1363 | } |
df7492f9 KH |
1364 | else |
1365 | { | |
1366 | c = ((surrogate - 0xD800) << 10) | (c - 0xDC00); | |
1367 | CODING_UTF_16_SURROGATE (coding) = surrogate = 0; | |
1368 | *charbuf++ = c; | |
1369 | } | |
1370 | } | |
1371 | else | |
1372 | { | |
1373 | if (UTF_16_HIGH_SURROGATE_P (c)) | |
1374 | CODING_UTF_16_SURROGATE (coding) = surrogate = c; | |
1375 | else | |
1376 | *charbuf++ = c; | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | no_more_source: | |
1381 | coding->consumed_char += consumed_chars_base; | |
1382 | coding->consumed = src_base - coding->source; | |
1383 | coding->charbuf_used = charbuf - coding->charbuf; | |
1384 | } | |
1385 | ||
1386 | static int | |
1387 | encode_coding_utf_16 (coding) | |
1388 | struct coding_system *coding; | |
1389 | { | |
1390 | int multibytep = coding->dst_multibyte; | |
1391 | int *charbuf = coding->charbuf; | |
1392 | int *charbuf_end = charbuf + coding->charbuf_used; | |
1393 | unsigned char *dst = coding->destination + coding->produced; | |
1394 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
1395 | int safe_room = 8; | |
1396 | enum utf_16_bom_type bom = CODING_UTF_16_BOM (coding); | |
1397 | int big_endian = CODING_UTF_16_ENDIAN (coding) == utf_16_big_endian; | |
1398 | int produced_chars = 0; | |
1399 | Lisp_Object attrs, eol_type, charset_list; | |
1400 | int c; | |
1401 | ||
1402 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
1403 | ||
1404 | if (bom == utf_16_with_bom) | |
1405 | { | |
1406 | ASSURE_DESTINATION (safe_room); | |
1407 | if (big_endian) | |
1408 | EMIT_TWO_BYTES (0xFF, 0xFE); | |
1409 | else | |
1410 | EMIT_TWO_BYTES (0xFE, 0xFF); | |
1411 | CODING_UTF_16_BOM (coding) = utf_16_without_bom; | |
1412 | } | |
1413 | ||
1414 | while (charbuf < charbuf_end) | |
1415 | { | |
1416 | ASSURE_DESTINATION (safe_room); | |
1417 | c = *charbuf++; | |
e19c3639 KH |
1418 | if (c >= MAX_UNICODE_CHAR) |
1419 | c = coding->default_char; | |
df7492f9 KH |
1420 | |
1421 | if (c < 0x10000) | |
1422 | { | |
1423 | if (big_endian) | |
1424 | EMIT_TWO_BYTES (c >> 8, c & 0xFF); | |
1425 | else | |
1426 | EMIT_TWO_BYTES (c & 0xFF, c >> 8); | |
1427 | } | |
1428 | else | |
1429 | { | |
1430 | int c1, c2; | |
1431 | ||
1432 | c -= 0x10000; | |
1433 | c1 = (c >> 10) + 0xD800; | |
1434 | c2 = (c & 0x3FF) + 0xDC00; | |
1435 | if (big_endian) | |
1436 | EMIT_FOUR_BYTES (c1 >> 8, c1 & 0xFF, c2 >> 8, c2 & 0xFF); | |
1437 | else | |
1438 | EMIT_FOUR_BYTES (c1 & 0xFF, c1 >> 8, c2 & 0xFF, c2 >> 8); | |
1439 | } | |
1440 | } | |
1441 | coding->result = CODING_RESULT_SUCCESS; | |
1442 | coding->produced = dst - coding->destination; | |
1443 | coding->produced_char += produced_chars; | |
1444 | return 0; | |
1445 | } | |
1446 | ||
1447 | \f | |
1448 | /*** 6. Old Emacs' internal format (emacs-mule) ***/ | |
1449 | ||
1450 | /* Emacs' internal format for representation of multiple character | |
1451 | sets is a kind of multi-byte encoding, i.e. characters are | |
1452 | represented by variable-length sequences of one-byte codes. | |
1453 | ||
1454 | ASCII characters and control characters (e.g. `tab', `newline') are | |
1455 | represented by one-byte sequences which are their ASCII codes, in | |
1456 | the range 0x00 through 0x7F. | |
1457 | ||
1458 | 8-bit characters of the range 0x80..0x9F are represented by | |
1459 | two-byte sequences of LEADING_CODE_8_BIT_CONTROL and (their 8-bit | |
1460 | code + 0x20). | |
1461 | ||
1462 | 8-bit characters of the range 0xA0..0xFF are represented by | |
1463 | one-byte sequences which are their 8-bit code. | |
1464 | ||
1465 | The other characters are represented by a sequence of `base | |
1466 | leading-code', optional `extended leading-code', and one or two | |
1467 | `position-code's. The length of the sequence is determined by the | |
1468 | base leading-code. Leading-code takes the range 0x81 through 0x9D, | |
1469 | whereas extended leading-code and position-code take the range 0xA0 | |
1470 | through 0xFF. See `charset.h' for more details about leading-code | |
1471 | and position-code. | |
1472 | ||
1473 | --- CODE RANGE of Emacs' internal format --- | |
1474 | character set range | |
1475 | ------------- ----- | |
1476 | ascii 0x00..0x7F | |
1477 | eight-bit-control LEADING_CODE_8_BIT_CONTROL + 0xA0..0xBF | |
1478 | eight-bit-graphic 0xA0..0xBF | |
1479 | ELSE 0x81..0x9D + [0xA0..0xFF]+ | |
1480 | --------------------------------------------- | |
1481 | ||
1482 | As this is the internal character representation, the format is | |
1483 | usually not used externally (i.e. in a file or in a data sent to a | |
1484 | process). But, it is possible to have a text externally in this | |
1485 | format (i.e. by encoding by the coding system `emacs-mule'). | |
1486 | ||
1487 | In that case, a sequence of one-byte codes has a slightly different | |
1488 | form. | |
1489 | ||
1490 | At first, all characters in eight-bit-control are represented by | |
1491 | one-byte sequences which are their 8-bit code. | |
1492 | ||
1493 | Next, character composition data are represented by the byte | |
1494 | sequence of the form: 0x80 METHOD BYTES CHARS COMPONENT ..., | |
1495 | where, | |
1496 | METHOD is 0xF0 plus one of composition method (enum | |
1497 | composition_method), | |
1498 | ||
1499 | BYTES is 0xA0 plus a byte length of this composition data, | |
1500 | ||
1501 | CHARS is 0x20 plus a number of characters composed by this | |
1502 | data, | |
1503 | ||
1504 | COMPONENTs are characters of multibye form or composition | |
1505 | rules encoded by two-byte of ASCII codes. | |
1506 | ||
1507 | In addition, for backward compatibility, the following formats are | |
1508 | also recognized as composition data on decoding. | |
1509 | ||
1510 | 0x80 MSEQ ... | |
1511 | 0x80 0xFF MSEQ RULE MSEQ RULE ... MSEQ | |
1512 | ||
1513 | Here, | |
1514 | MSEQ is a multibyte form but in these special format: | |
1515 | ASCII: 0xA0 ASCII_CODE+0x80, | |
1516 | other: LEADING_CODE+0x20 FOLLOWING-BYTE ..., | |
1517 | RULE is a one byte code of the range 0xA0..0xF0 that | |
1518 | represents a composition rule. | |
1519 | */ | |
1520 | ||
1521 | char emacs_mule_bytes[256]; | |
1522 | ||
1523 | /* Leading-code followed by extended leading-code. */ | |
1524 | #define LEADING_CODE_PRIVATE_11 0x9A /* for private DIMENSION1 of 1-column */ | |
1525 | #define LEADING_CODE_PRIVATE_12 0x9B /* for private DIMENSION1 of 2-column */ | |
1526 | #define LEADING_CODE_PRIVATE_21 0x9C /* for private DIMENSION2 of 1-column */ | |
1527 | #define LEADING_CODE_PRIVATE_22 0x9D /* for private DIMENSION2 of 2-column */ | |
1528 | ||
1529 | ||
1530 | int | |
1531 | emacs_mule_char (coding, composition, nbytes, nchars) | |
1532 | struct coding_system *coding; | |
1533 | int composition; | |
1534 | int *nbytes, *nchars; | |
1535 | { | |
1536 | unsigned char *src = coding->source + coding->consumed; | |
1537 | unsigned char *src_end = coding->source + coding->src_bytes; | |
1538 | int multibytep = coding->src_multibyte; | |
1539 | unsigned char *src_base = src; | |
1540 | struct charset *charset; | |
1541 | unsigned code; | |
1542 | int c; | |
1543 | int consumed_chars = 0; | |
1544 | ||
1545 | ONE_MORE_BYTE (c); | |
1546 | if (composition) | |
1547 | { | |
1548 | c -= 0x20; | |
1549 | if (c == 0x80) | |
1550 | { | |
1551 | ONE_MORE_BYTE (c); | |
1552 | if (c < 0xA0) | |
1553 | goto invalid_code; | |
1554 | *nbytes = src - src_base; | |
1555 | *nchars = consumed_chars; | |
1556 | return (c - 0x80); | |
aa72b389 | 1557 | } |
df7492f9 KH |
1558 | } |
1559 | ||
1560 | switch (emacs_mule_bytes[c]) | |
1561 | { | |
1562 | case 2: | |
1563 | if (! (charset = emacs_mule_charset[c])) | |
1564 | goto invalid_code; | |
1565 | ONE_MORE_BYTE (c); | |
1566 | code = c & 0x7F; | |
1567 | break; | |
1568 | ||
1569 | case 3: | |
1570 | if (c == LEADING_CODE_PRIVATE_11 | |
1571 | || c == LEADING_CODE_PRIVATE_12) | |
b73bfc1c | 1572 | { |
df7492f9 KH |
1573 | ONE_MORE_BYTE (c); |
1574 | if (! (charset = emacs_mule_charset[c])) | |
1575 | goto invalid_code; | |
1576 | ONE_MORE_BYTE (c); | |
1577 | code = c & 0x7F; | |
b73bfc1c KH |
1578 | } |
1579 | else | |
1580 | { | |
df7492f9 KH |
1581 | if (! (charset = emacs_mule_charset[c])) |
1582 | goto invalid_code; | |
1583 | ONE_MORE_BYTE (c); | |
1584 | code = (c & 0x7F) << 7; | |
1585 | ONE_MORE_BYTE (c); | |
1586 | code |= c & 0x7F; | |
1587 | } | |
1588 | break; | |
1589 | ||
1590 | case 4: | |
1591 | if (! (charset = emacs_mule_charset[c])) | |
1592 | goto invalid_code; | |
1593 | ONE_MORE_BYTE (c); | |
1594 | code = (c & 0x7F) << 7; | |
1595 | ONE_MORE_BYTE (c); | |
1596 | code |= c & 0x7F; | |
1597 | break; | |
1598 | ||
1599 | case 1: | |
1600 | code = c; | |
1601 | charset = CHARSET_FROM_ID (ASCII_BYTE_P (code) ? charset_ascii | |
1602 | : code < 0xA0 ? charset_8_bit_control | |
1603 | : charset_8_bit_graphic); | |
1604 | break; | |
1605 | ||
1606 | default: | |
1607 | abort (); | |
1608 | } | |
1609 | c = DECODE_CHAR (charset, code); | |
1610 | if (c < 0) | |
1611 | goto invalid_code; | |
1612 | *nbytes = src - src_base; | |
1613 | *nchars = consumed_chars; | |
1614 | return c; | |
1615 | ||
1616 | no_more_source: | |
1617 | return -2; | |
1618 | ||
1619 | invalid_code: | |
1620 | return -1; | |
1621 | } | |
1622 | ||
1623 | ||
1624 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
1625 | Check if a text is encoded in `emacs-mule'. */ | |
1626 | ||
1627 | static int | |
1628 | detect_coding_emacs_mule (coding, mask) | |
1629 | struct coding_system *coding; | |
1630 | int *mask; | |
1631 | { | |
1632 | unsigned char *src = coding->source, *src_base = src; | |
1633 | unsigned char *src_end = coding->source + coding->src_bytes; | |
1634 | int multibytep = coding->src_multibyte; | |
1635 | int consumed_chars = 0; | |
1636 | int c; | |
1637 | int found = 0; | |
1638 | ||
1639 | /* A coding system of this category is always ASCII compatible. */ | |
1640 | src += coding->head_ascii; | |
1641 | ||
1642 | while (1) | |
1643 | { | |
1644 | ONE_MORE_BYTE (c); | |
1645 | ||
1646 | if (c == 0x80) | |
1647 | { | |
1648 | /* Perhaps the start of composite character. We simple skip | |
1649 | it because analyzing it is too heavy for detecting. But, | |
1650 | at least, we check that the composite character | |
1651 | constitues of more than 4 bytes. */ | |
1652 | unsigned char *src_base; | |
1653 | ||
1654 | repeat: | |
1655 | src_base = src; | |
1656 | do | |
1657 | { | |
1658 | ONE_MORE_BYTE (c); | |
1659 | } | |
1660 | while (c >= 0xA0); | |
1661 | ||
1662 | if (src - src_base <= 4) | |
1663 | break; | |
1664 | found = 1; | |
1665 | if (c == 0x80) | |
1666 | goto repeat; | |
b73bfc1c | 1667 | } |
df7492f9 KH |
1668 | |
1669 | if (c < 0x80) | |
b73bfc1c | 1670 | { |
df7492f9 KH |
1671 | if (c < 0x20 |
1672 | && (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)) | |
1673 | break; | |
1674 | } | |
1675 | else | |
1676 | { | |
1677 | unsigned char *src_base = src - 1; | |
1678 | ||
1679 | do | |
1680 | { | |
1681 | ONE_MORE_BYTE (c); | |
1682 | } | |
1683 | while (c >= 0xA0); | |
1684 | if (src - src_base != emacs_mule_bytes[*src_base]) | |
1685 | break; | |
1686 | found = 1; | |
4ed46869 KH |
1687 | } |
1688 | } | |
df7492f9 KH |
1689 | *mask &= ~CATEGORY_MASK_EMACS_MULE; |
1690 | return 0; | |
1691 | ||
1692 | no_more_source: | |
1693 | if (!found) | |
1694 | return 0; | |
1695 | *mask &= CATEGORY_MASK_EMACS_MULE; | |
1696 | return 1; | |
4ed46869 KH |
1697 | } |
1698 | ||
b73bfc1c | 1699 | |
df7492f9 KH |
1700 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
1701 | ||
1702 | /* Decode a character represented as a component of composition | |
1703 | sequence of Emacs 20/21 style at SRC. Set C to that character and | |
1704 | update SRC to the head of next character (or an encoded composition | |
1705 | rule). If SRC doesn't points a composition component, set C to -1. | |
1706 | If SRC points an invalid byte sequence, global exit by a return | |
1707 | value 0. */ | |
1708 | ||
1709 | #define DECODE_EMACS_MULE_COMPOSITION_CHAR(buf) \ | |
1710 | if (1) \ | |
1711 | { \ | |
1712 | int c; \ | |
1713 | int nbytes, nchars; \ | |
1714 | \ | |
1715 | if (src == src_end) \ | |
1716 | break; \ | |
1717 | c = emacs_mule_char (coding, 1, &nbytes, &nchars); \ | |
1718 | if (c < 0) \ | |
1719 | { \ | |
1720 | if (c == -2) \ | |
1721 | break; \ | |
1722 | goto invalid_code; \ | |
1723 | } \ | |
1724 | *buf++ = c; \ | |
1725 | src += nbytes; \ | |
1726 | consumed_chars += nchars; \ | |
1727 | } \ | |
1728 | else | |
1729 | ||
1730 | ||
1731 | /* Decode a composition rule represented as a component of composition | |
1732 | sequence of Emacs 20 style at SRC. Set C to the rule. If SRC | |
1733 | points an invalid byte sequence, set C to -1. */ | |
1734 | ||
1735 | #define DECODE_EMACS_MULE_COMPOSITION_RULE(buf) \ | |
1736 | do { \ | |
1737 | int c, gref, nref; \ | |
1738 | \ | |
1739 | if (src < src_end) \ | |
1740 | goto invalid_code; \ | |
1741 | ONE_MORE_BYTE_NO_CHECK (c); \ | |
1742 | c -= 0xA0; \ | |
1743 | if (c < 0 || c >= 81) \ | |
1744 | goto invalid_code; \ | |
1745 | \ | |
1746 | gref = c / 9, nref = c % 9; \ | |
1747 | *buf++ = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
1748 | } while (0) | |
1749 | ||
1750 | ||
1751 | #define ADD_COMPOSITION_DATA(buf, method, nchars) \ | |
1752 | do { \ | |
1753 | *buf++ = -5; \ | |
1754 | *buf++ = coding->produced_char + char_offset; \ | |
1755 | *buf++ = CODING_ANNOTATE_COMPOSITION_MASK; \ | |
1756 | *buf++ = method; \ | |
1757 | *buf++ = nchars; \ | |
1758 | } while (0) | |
aa72b389 | 1759 | |
df7492f9 KH |
1760 | |
1761 | #define DECODE_EMACS_MULE_21_COMPOSITION(c) \ | |
aa72b389 | 1762 | do { \ |
df7492f9 KH |
1763 | /* Emacs 21 style format. The first three bytes at SRC are \ |
1764 | (METHOD - 0xF0), (BYTES - 0xA0), (CHARS - 0xA0), where BYTES is \ | |
1765 | the byte length of this composition information, CHARS is the \ | |
1766 | number of characters composed by this composition. */ \ | |
1767 | enum composition_method method = c - 0xF0; \ | |
1768 | int consumed_chars_limit; \ | |
1769 | int nbytes, nchars; \ | |
1770 | \ | |
1771 | ONE_MORE_BYTE (c); \ | |
1772 | nbytes = c - 0xA0; \ | |
1773 | if (nbytes < 3) \ | |
1774 | goto invalid_code; \ | |
1775 | ONE_MORE_BYTE (c); \ | |
1776 | nchars = c - 0xA0; \ | |
1777 | ADD_COMPOSITION_DATA (charbuf, method, nchars); \ | |
1778 | consumed_chars_limit = consumed_chars_base + nbytes; \ | |
1779 | if (method != COMPOSITION_RELATIVE) \ | |
aa72b389 | 1780 | { \ |
df7492f9 KH |
1781 | int i = 0; \ |
1782 | while (consumed_chars < consumed_chars_limit) \ | |
aa72b389 | 1783 | { \ |
df7492f9 KH |
1784 | if (i % 2 && method != COMPOSITION_WITH_ALTCHARS) \ |
1785 | DECODE_EMACS_MULE_COMPOSITION_RULE (charbuf); \ | |
1786 | else \ | |
1787 | DECODE_EMACS_MULE_COMPOSITION_CHAR (charbuf); \ | |
aa72b389 | 1788 | } \ |
df7492f9 KH |
1789 | if (consumed_chars < consumed_chars_limit) \ |
1790 | goto invalid_code; \ | |
aa72b389 KH |
1791 | } \ |
1792 | } while (0) | |
93dec019 | 1793 | |
aa72b389 | 1794 | |
df7492f9 KH |
1795 | #define DECODE_EMACS_MULE_20_RELATIVE_COMPOSITION(c) \ |
1796 | do { \ | |
1797 | /* Emacs 20 style format for relative composition. */ \ | |
1798 | /* Store multibyte form of characters to be composed. */ \ | |
1799 | int components[MAX_COMPOSITION_COMPONENTS * 2 - 1]; \ | |
1800 | int *buf = components; \ | |
1801 | int i, j; \ | |
1802 | \ | |
1803 | src = src_base; \ | |
1804 | ONE_MORE_BYTE (c); /* skip 0x80 */ \ | |
1805 | for (i = 0; i < MAX_COMPOSITION_COMPONENTS; i++) \ | |
1806 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ | |
1807 | if (i < 2) \ | |
1808 | goto invalid_code; \ | |
1809 | ADD_COMPOSITION_DATA (charbuf, COMPOSITION_RELATIVE, i); \ | |
1810 | for (j = 0; j < i; j++) \ | |
1811 | *charbuf++ = components[j]; \ | |
1812 | } while (0) | |
1813 | ||
1814 | ||
1815 | #define DECODE_EMACS_MULE_20_RULEBASE_COMPOSITION(c) \ | |
1816 | do { \ | |
1817 | /* Emacs 20 style format for rule-base composition. */ \ | |
1818 | /* Store multibyte form of characters to be composed. */ \ | |
1819 | int components[MAX_COMPOSITION_COMPONENTS * 2 - 1]; \ | |
1820 | int *buf = components; \ | |
1821 | int i, j; \ | |
1822 | \ | |
1823 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ | |
1824 | for (i = 0; i < MAX_COMPOSITION_COMPONENTS; i++) \ | |
1825 | { \ | |
1826 | DECODE_EMACS_MULE_COMPOSITION_RULE (buf); \ | |
1827 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ | |
1828 | } \ | |
1829 | if (i < 1 || (buf - components) % 2 == 0) \ | |
1830 | goto invalid_code; \ | |
1831 | if (charbuf + i + (i / 2) + 1 < charbuf_end) \ | |
1832 | goto no_more_source; \ | |
1833 | ADD_COMPOSITION_DATA (buf, COMPOSITION_WITH_RULE, i); \ | |
1834 | for (j = 0; j < i; j++) \ | |
1835 | *charbuf++ = components[j]; \ | |
1836 | for (j = 0; j < i; j += 2) \ | |
1837 | *charbuf++ = components[j]; \ | |
1838 | } while (0) | |
1839 | ||
aa72b389 KH |
1840 | |
1841 | static void | |
df7492f9 | 1842 | decode_coding_emacs_mule (coding) |
aa72b389 | 1843 | struct coding_system *coding; |
aa72b389 | 1844 | { |
df7492f9 KH |
1845 | unsigned char *src = coding->source + coding->consumed; |
1846 | unsigned char *src_end = coding->source + coding->src_bytes; | |
aa72b389 | 1847 | unsigned char *src_base; |
df7492f9 KH |
1848 | int *charbuf = coding->charbuf; |
1849 | int *charbuf_end = charbuf + coding->charbuf_size; | |
1850 | int consumed_chars = 0, consumed_chars_base; | |
1851 | int char_offset = 0; | |
1852 | int multibytep = coding->src_multibyte; | |
1853 | Lisp_Object attrs, eol_type, charset_list; | |
aa72b389 | 1854 | |
df7492f9 | 1855 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
aa72b389 | 1856 | |
aa72b389 KH |
1857 | while (1) |
1858 | { | |
df7492f9 KH |
1859 | int c; |
1860 | ||
aa72b389 | 1861 | src_base = src; |
df7492f9 KH |
1862 | consumed_chars_base = consumed_chars; |
1863 | ||
1864 | if (charbuf >= charbuf_end) | |
1865 | break; | |
aa72b389 | 1866 | |
df7492f9 KH |
1867 | ONE_MORE_BYTE (c); |
1868 | ||
1869 | if (c < 0x80) | |
aa72b389 | 1870 | { |
df7492f9 KH |
1871 | if (c == '\r') |
1872 | { | |
1873 | if (EQ (eol_type, Qdos)) | |
1874 | { | |
1875 | if (src == src_end) | |
1876 | goto no_more_source; | |
1877 | if (*src == '\n') | |
1878 | ONE_MORE_BYTE (c); | |
1879 | } | |
1880 | else if (EQ (eol_type, Qmac)) | |
1881 | c = '\n'; | |
1882 | } | |
1883 | *charbuf++ = c; | |
1884 | char_offset++; | |
aa72b389 | 1885 | } |
df7492f9 KH |
1886 | else if (c == 0x80) |
1887 | { | |
1888 | if (charbuf + 5 + (MAX_COMPOSITION_COMPONENTS * 2) - 1 > charbuf_end) | |
1889 | break; | |
1890 | ONE_MORE_BYTE (c); | |
1891 | if (c - 0xF0 >= COMPOSITION_RELATIVE | |
1892 | && c - 0xF0 <= COMPOSITION_WITH_RULE_ALTCHARS) | |
1893 | DECODE_EMACS_MULE_21_COMPOSITION (c); | |
1894 | else if (c < 0xC0) | |
1895 | DECODE_EMACS_MULE_20_RELATIVE_COMPOSITION (c); | |
1896 | else if (c == 0xFF) | |
1897 | DECODE_EMACS_MULE_20_RULEBASE_COMPOSITION (c); | |
1898 | else | |
1899 | goto invalid_code; | |
1900 | } | |
1901 | else if (c < 0xA0 && emacs_mule_bytes[c] > 1) | |
1902 | { | |
1903 | int nbytes, nchars; | |
1904 | src--; | |
1905 | c = emacs_mule_char (coding, 0, &nbytes, &nchars); | |
1906 | if (c < 0) | |
1907 | { | |
1908 | if (c == -2) | |
1909 | break; | |
1910 | goto invalid_code; | |
1911 | } | |
1912 | *charbuf++ = c; | |
1913 | char_offset++; | |
1914 | } | |
1915 | continue; | |
1916 | ||
1917 | invalid_code: | |
1918 | src = src_base; | |
1919 | consumed_chars = consumed_chars_base; | |
1920 | ONE_MORE_BYTE (c); | |
1921 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
1922 | coding->errors++; | |
1923 | } | |
1924 | ||
1925 | no_more_source: | |
1926 | coding->consumed_char += consumed_chars_base; | |
1927 | coding->consumed = src_base - coding->source; | |
1928 | coding->charbuf_used = charbuf - coding->charbuf; | |
1929 | } | |
1930 | ||
1931 | ||
1932 | #define EMACS_MULE_LEADING_CODES(id, codes) \ | |
1933 | do { \ | |
1934 | if (id < 0xA0) \ | |
1935 | codes[0] = id, codes[1] = 0; \ | |
1936 | else if (id < 0xE0) \ | |
1937 | codes[0] = 0x9A, codes[1] = id; \ | |
1938 | else if (id < 0xF0) \ | |
1939 | codes[0] = 0x9B, codes[1] = id; \ | |
1940 | else if (id < 0xF5) \ | |
1941 | codes[0] = 0x9C, codes[1] = id; \ | |
1942 | else \ | |
1943 | codes[0] = 0x9D, codes[1] = id; \ | |
1944 | } while (0); | |
1945 | ||
aa72b389 | 1946 | |
df7492f9 KH |
1947 | static int |
1948 | encode_coding_emacs_mule (coding) | |
1949 | struct coding_system *coding; | |
1950 | { | |
1951 | int multibytep = coding->dst_multibyte; | |
1952 | int *charbuf = coding->charbuf; | |
1953 | int *charbuf_end = charbuf + coding->charbuf_used; | |
1954 | unsigned char *dst = coding->destination + coding->produced; | |
1955 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
1956 | int safe_room = 8; | |
df7492f9 KH |
1957 | int produced_chars = 0; |
1958 | Lisp_Object attrs, eol_type, charset_list; | |
1959 | int c; | |
1960 | ||
1961 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
1962 | ||
1963 | while (charbuf < charbuf_end) | |
1964 | { | |
1965 | ASSURE_DESTINATION (safe_room); | |
1966 | c = *charbuf++; | |
1967 | if (ASCII_CHAR_P (c)) | |
1968 | EMIT_ONE_ASCII_BYTE (c); | |
1969 | else | |
aa72b389 | 1970 | { |
df7492f9 KH |
1971 | struct charset *charset; |
1972 | unsigned code; | |
1973 | int dimension; | |
1974 | int emacs_mule_id; | |
1975 | unsigned char leading_codes[2]; | |
1976 | ||
1977 | charset = char_charset (c, charset_list, &code); | |
1978 | if (! charset) | |
1979 | { | |
1980 | c = coding->default_char; | |
1981 | if (ASCII_CHAR_P (c)) | |
1982 | { | |
1983 | EMIT_ONE_ASCII_BYTE (c); | |
1984 | continue; | |
1985 | } | |
1986 | charset = char_charset (c, charset_list, &code); | |
1987 | } | |
1988 | dimension = CHARSET_DIMENSION (charset); | |
1989 | emacs_mule_id = CHARSET_EMACS_MULE_ID (charset); | |
1990 | EMACS_MULE_LEADING_CODES (emacs_mule_id, leading_codes); | |
1991 | EMIT_ONE_BYTE (leading_codes[0]); | |
1992 | if (leading_codes[1]) | |
1993 | EMIT_ONE_BYTE (leading_codes[1]); | |
1994 | if (dimension == 1) | |
1995 | EMIT_ONE_BYTE (code); | |
aa72b389 | 1996 | else |
df7492f9 KH |
1997 | { |
1998 | EMIT_ONE_BYTE (code >> 8); | |
1999 | EMIT_ONE_BYTE (code & 0xFF); | |
2000 | } | |
aa72b389 | 2001 | } |
aa72b389 | 2002 | } |
df7492f9 KH |
2003 | coding->result = CODING_RESULT_SUCCESS; |
2004 | coding->produced_char += produced_chars; | |
2005 | coding->produced = dst - coding->destination; | |
2006 | return 0; | |
aa72b389 | 2007 | } |
b73bfc1c | 2008 | |
4ed46869 | 2009 | \f |
df7492f9 | 2010 | /*** 7. ISO2022 handlers ***/ |
4ed46869 KH |
2011 | |
2012 | /* The following note describes the coding system ISO2022 briefly. | |
39787efd | 2013 | Since the intention of this note is to help understand the |
df7492f9 | 2014 | functions in this file, some parts are NOT ACCURATE or OVERLY |
39787efd | 2015 | SIMPLIFIED. For thorough understanding, please refer to the |
df7492f9 | 2016 | original document of ISO2022. |
4ed46869 KH |
2017 | |
2018 | ISO2022 provides many mechanisms to encode several character sets | |
df7492f9 | 2019 | in 7-bit and 8-bit environments. For 7-bite environments, all text |
39787efd KH |
2020 | is encoded using bytes less than 128. This may make the encoded |
2021 | text a little bit longer, but the text passes more easily through | |
df7492f9 | 2022 | several gateways, some of which strip off MSB (Most Signigant Bit). |
b73bfc1c | 2023 | |
df7492f9 KH |
2024 | There are two kinds of character sets: control character set and |
2025 | graphic character set. The former contains control characters such | |
4ed46869 | 2026 | as `newline' and `escape' to provide control functions (control |
39787efd | 2027 | functions are also provided by escape sequences). The latter |
df7492f9 | 2028 | contains graphic characters such as 'A' and '-'. Emacs recognizes |
4ed46869 KH |
2029 | two control character sets and many graphic character sets. |
2030 | ||
2031 | Graphic character sets are classified into one of the following | |
39787efd KH |
2032 | four classes, according to the number of bytes (DIMENSION) and |
2033 | number of characters in one dimension (CHARS) of the set: | |
2034 | - DIMENSION1_CHARS94 | |
2035 | - DIMENSION1_CHARS96 | |
2036 | - DIMENSION2_CHARS94 | |
2037 | - DIMENSION2_CHARS96 | |
2038 | ||
2039 | In addition, each character set is assigned an identification tag, | |
df7492f9 | 2040 | unique for each set, called "final character" (denoted as <F> |
39787efd KH |
2041 | hereafter). The <F> of each character set is decided by ECMA(*) |
2042 | when it is registered in ISO. The code range of <F> is 0x30..0x7F | |
2043 | (0x30..0x3F are for private use only). | |
4ed46869 KH |
2044 | |
2045 | Note (*): ECMA = European Computer Manufacturers Association | |
2046 | ||
df7492f9 | 2047 | Here are examples of graphic character set [NAME(<F>)]: |
4ed46869 KH |
2048 | o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ... |
2049 | o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ... | |
2050 | o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ... | |
2051 | o DIMENSION2_CHARS96 -- none for the moment | |
2052 | ||
39787efd | 2053 | A code area (1 byte=8 bits) is divided into 4 areas, C0, GL, C1, and GR. |
4ed46869 KH |
2054 | C0 [0x00..0x1F] -- control character plane 0 |
2055 | GL [0x20..0x7F] -- graphic character plane 0 | |
2056 | C1 [0x80..0x9F] -- control character plane 1 | |
2057 | GR [0xA0..0xFF] -- graphic character plane 1 | |
2058 | ||
2059 | A control character set is directly designated and invoked to C0 or | |
39787efd KH |
2060 | C1 by an escape sequence. The most common case is that: |
2061 | - ISO646's control character set is designated/invoked to C0, and | |
2062 | - ISO6429's control character set is designated/invoked to C1, | |
2063 | and usually these designations/invocations are omitted in encoded | |
2064 | text. In a 7-bit environment, only C0 can be used, and a control | |
2065 | character for C1 is encoded by an appropriate escape sequence to | |
2066 | fit into the environment. All control characters for C1 are | |
2067 | defined to have corresponding escape sequences. | |
4ed46869 KH |
2068 | |
2069 | A graphic character set is at first designated to one of four | |
2070 | graphic registers (G0 through G3), then these graphic registers are | |
2071 | invoked to GL or GR. These designations and invocations can be | |
2072 | done independently. The most common case is that G0 is invoked to | |
39787efd KH |
2073 | GL, G1 is invoked to GR, and ASCII is designated to G0. Usually |
2074 | these invocations and designations are omitted in encoded text. | |
2075 | In a 7-bit environment, only GL can be used. | |
4ed46869 | 2076 | |
39787efd KH |
2077 | When a graphic character set of CHARS94 is invoked to GL, codes |
2078 | 0x20 and 0x7F of the GL area work as control characters SPACE and | |
2079 | DEL respectively, and codes 0xA0 and 0xFF of the GR area should not | |
2080 | be used. | |
4ed46869 KH |
2081 | |
2082 | There are two ways of invocation: locking-shift and single-shift. | |
2083 | With locking-shift, the invocation lasts until the next different | |
39787efd KH |
2084 | invocation, whereas with single-shift, the invocation affects the |
2085 | following character only and doesn't affect the locking-shift | |
2086 | state. Invocations are done by the following control characters or | |
2087 | escape sequences: | |
4ed46869 KH |
2088 | |
2089 | ---------------------------------------------------------------------- | |
39787efd | 2090 | abbrev function cntrl escape seq description |
4ed46869 | 2091 | ---------------------------------------------------------------------- |
39787efd KH |
2092 | SI/LS0 (shift-in) 0x0F none invoke G0 into GL |
2093 | SO/LS1 (shift-out) 0x0E none invoke G1 into GL | |
2094 | LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL | |
2095 | LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL | |
2096 | LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*) | |
2097 | LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*) | |
2098 | LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*) | |
2099 | SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char | |
2100 | SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char | |
4ed46869 | 2101 | ---------------------------------------------------------------------- |
39787efd KH |
2102 | (*) These are not used by any known coding system. |
2103 | ||
2104 | Control characters for these functions are defined by macros | |
2105 | ISO_CODE_XXX in `coding.h'. | |
4ed46869 | 2106 | |
39787efd | 2107 | Designations are done by the following escape sequences: |
4ed46869 KH |
2108 | ---------------------------------------------------------------------- |
2109 | escape sequence description | |
2110 | ---------------------------------------------------------------------- | |
2111 | ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0 | |
2112 | ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1 | |
2113 | ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2 | |
2114 | ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3 | |
2115 | ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*) | |
2116 | ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1 | |
2117 | ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2 | |
2118 | ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3 | |
2119 | ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**) | |
2120 | ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1 | |
2121 | ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2 | |
2122 | ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3 | |
2123 | ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*) | |
2124 | ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1 | |
2125 | ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2 | |
2126 | ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3 | |
2127 | ---------------------------------------------------------------------- | |
2128 | ||
2129 | In this list, "DIMENSION1_CHARS94<F>" means a graphic character set | |
39787efd | 2130 | of dimension 1, chars 94, and final character <F>, etc... |
4ed46869 KH |
2131 | |
2132 | Note (*): Although these designations are not allowed in ISO2022, | |
2133 | Emacs accepts them on decoding, and produces them on encoding | |
39787efd | 2134 | CHARS96 character sets in a coding system which is characterized as |
4ed46869 KH |
2135 | 7-bit environment, non-locking-shift, and non-single-shift. |
2136 | ||
2137 | Note (**): If <F> is '@', 'A', or 'B', the intermediate character | |
df7492f9 | 2138 | '(' must be omitted. We refer to this as "short-form" hereafter. |
4ed46869 | 2139 | |
df7492f9 | 2140 | Now you may notice that there are a lot of ways for encoding the |
39787efd KH |
2141 | same multilingual text in ISO2022. Actually, there exist many |
2142 | coding systems such as Compound Text (used in X11's inter client | |
df7492f9 KH |
2143 | communication, ISO-2022-JP (used in Japanese internet), ISO-2022-KR |
2144 | (used in Korean internet), EUC (Extended UNIX Code, used in Asian | |
4ed46869 KH |
2145 | localized platforms), and all of these are variants of ISO2022. |
2146 | ||
2147 | In addition to the above, Emacs handles two more kinds of escape | |
2148 | sequences: ISO6429's direction specification and Emacs' private | |
2149 | sequence for specifying character composition. | |
2150 | ||
39787efd | 2151 | ISO6429's direction specification takes the following form: |
4ed46869 KH |
2152 | o CSI ']' -- end of the current direction |
2153 | o CSI '0' ']' -- end of the current direction | |
2154 | o CSI '1' ']' -- start of left-to-right text | |
2155 | o CSI '2' ']' -- start of right-to-left text | |
2156 | The control character CSI (0x9B: control sequence introducer) is | |
39787efd KH |
2157 | abbreviated to the escape sequence ESC '[' in a 7-bit environment. |
2158 | ||
2159 | Character composition specification takes the following form: | |
ec6d2bb8 KH |
2160 | o ESC '0' -- start relative composition |
2161 | o ESC '1' -- end composition | |
2162 | o ESC '2' -- start rule-base composition (*) | |
2163 | o ESC '3' -- start relative composition with alternate chars (**) | |
2164 | o ESC '4' -- start rule-base composition with alternate chars (**) | |
b73bfc1c | 2165 | Since these are not standard escape sequences of any ISO standard, |
df7492f9 | 2166 | the use of them for these meaning is restricted to Emacs only. |
ec6d2bb8 | 2167 | |
df7492f9 | 2168 | (*) This form is used only in Emacs 20.5 and the older versions, |
b73bfc1c | 2169 | but the newer versions can safely decode it. |
df7492f9 | 2170 | (**) This form is used only in Emacs 21.1 and the newer versions, |
b73bfc1c | 2171 | and the older versions can't decode it. |
ec6d2bb8 | 2172 | |
df7492f9 | 2173 | Here's a list of examples usages of these composition escape |
b73bfc1c | 2174 | sequences (categorized by `enum composition_method'). |
ec6d2bb8 | 2175 | |
b73bfc1c | 2176 | COMPOSITION_RELATIVE: |
ec6d2bb8 | 2177 | ESC 0 CHAR [ CHAR ] ESC 1 |
df7492f9 | 2178 | COMPOSITOIN_WITH_RULE: |
ec6d2bb8 | 2179 | ESC 2 CHAR [ RULE CHAR ] ESC 1 |
b73bfc1c | 2180 | COMPOSITION_WITH_ALTCHARS: |
ec6d2bb8 | 2181 | ESC 3 ALTCHAR [ ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 |
b73bfc1c | 2182 | COMPOSITION_WITH_RULE_ALTCHARS: |
ec6d2bb8 | 2183 | ESC 4 ALTCHAR [ RULE ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 */ |
4ed46869 KH |
2184 | |
2185 | enum iso_code_class_type iso_code_class[256]; | |
2186 | ||
df7492f9 KH |
2187 | #define SAFE_CHARSET_P(coding, id) \ |
2188 | ((id) <= (coding)->max_charset_id \ | |
2189 | && (coding)->safe_charsets[id] >= 0) | |
2190 | ||
2191 | ||
2192 | #define SHIFT_OUT_OK(category) \ | |
2193 | (CODING_ISO_INITIAL (&coding_categories[category], 1) >= 0) | |
2194 | ||
2195 | static void | |
2196 | setup_iso_safe_charsets (Lisp_Object attrs) | |
2197 | { | |
2198 | Lisp_Object charset_list, safe_charsets; | |
2199 | Lisp_Object request; | |
2200 | Lisp_Object reg_usage; | |
2201 | Lisp_Object tail; | |
2202 | int reg94, reg96; | |
2203 | int flags = XINT (AREF (attrs, coding_attr_iso_flags)); | |
2204 | int max_charset_id; | |
2205 | ||
2206 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
2207 | if ((flags & CODING_ISO_FLAG_FULL_SUPPORT) | |
2208 | && ! EQ (charset_list, Viso_2022_charset_list)) | |
2209 | { | |
2210 | CODING_ATTR_CHARSET_LIST (attrs) | |
2211 | = charset_list = Viso_2022_charset_list; | |
2212 | ASET (attrs, coding_attr_safe_charsets, Qnil); | |
2213 | } | |
2214 | ||
2215 | if (STRINGP (AREF (attrs, coding_attr_safe_charsets))) | |
2216 | return; | |
2217 | ||
2218 | max_charset_id = 0; | |
2219 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
2220 | { | |
2221 | int id = XINT (XCAR (tail)); | |
2222 | if (max_charset_id < id) | |
2223 | max_charset_id = id; | |
2224 | } | |
2225 | ||
2226 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), | |
2227 | make_number (255)); | |
2228 | request = AREF (attrs, coding_attr_iso_request); | |
2229 | reg_usage = AREF (attrs, coding_attr_iso_usage); | |
2230 | reg94 = XINT (XCAR (reg_usage)); | |
2231 | reg96 = XINT (XCDR (reg_usage)); | |
2232 | ||
2233 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
2234 | { | |
2235 | Lisp_Object id; | |
2236 | Lisp_Object reg; | |
2237 | struct charset *charset; | |
2238 | ||
2239 | id = XCAR (tail); | |
2240 | charset = CHARSET_FROM_ID (XINT (id)); | |
2241 | reg = Fcdr (Fassq (request, id)); | |
2242 | if (! NILP (reg)) | |
2243 | XSTRING (safe_charsets)->data[XINT (id)] = XINT (reg); | |
2244 | else if (charset->iso_chars_96) | |
2245 | { | |
2246 | if (reg96 < 4) | |
2247 | XSTRING (safe_charsets)->data[XINT (id)] = reg96; | |
2248 | } | |
2249 | else | |
2250 | { | |
2251 | if (reg94 < 4) | |
2252 | XSTRING (safe_charsets)->data[XINT (id)] = reg94; | |
2253 | } | |
2254 | } | |
2255 | ASET (attrs, coding_attr_safe_charsets, safe_charsets); | |
2256 | } | |
d46c5b12 | 2257 | |
d46c5b12 | 2258 | |
4ed46869 | 2259 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
df7492f9 | 2260 | Check if a text is encoded in ISO2022. If it is, returns an |
4ed46869 | 2261 | integer in which appropriate flag bits any of: |
df7492f9 KH |
2262 | CATEGORY_MASK_ISO_7 |
2263 | CATEGORY_MASK_ISO_7_TIGHT | |
2264 | CATEGORY_MASK_ISO_8_1 | |
2265 | CATEGORY_MASK_ISO_8_2 | |
2266 | CATEGORY_MASK_ISO_7_ELSE | |
2267 | CATEGORY_MASK_ISO_8_ELSE | |
4ed46869 KH |
2268 | are set. If a code which should never appear in ISO2022 is found, |
2269 | returns 0. */ | |
2270 | ||
0a28aafb | 2271 | static int |
df7492f9 KH |
2272 | detect_coding_iso_2022 (coding, mask) |
2273 | struct coding_system *coding; | |
2274 | int *mask; | |
4ed46869 | 2275 | { |
df7492f9 KH |
2276 | unsigned char *src = coding->source, *src_base = src; |
2277 | unsigned char *src_end = coding->source + coding->src_bytes; | |
2278 | int multibytep = coding->src_multibyte; | |
2279 | int mask_iso = CATEGORY_MASK_ISO; | |
2280 | int mask_found = 0, mask_8bit_found = 0; | |
f46869e4 | 2281 | int reg[4], shift_out = 0, single_shifting = 0; |
df7492f9 KH |
2282 | int id; |
2283 | int c, c1; | |
2284 | int consumed_chars = 0; | |
2285 | int i; | |
2286 | ||
2287 | for (i = coding_category_iso_7; i <= coding_category_iso_8_else; i++) | |
2288 | { | |
2289 | struct coding_system *this = &(coding_categories[i]); | |
2290 | Lisp_Object attrs, val; | |
2291 | ||
2292 | attrs = CODING_ID_ATTRS (this->id); | |
2293 | if (CODING_ISO_FLAGS (this) & CODING_ISO_FLAG_FULL_SUPPORT | |
2294 | && ! EQ (CODING_ATTR_SAFE_CHARSETS (attrs), Viso_2022_charset_list)) | |
2295 | setup_iso_safe_charsets (attrs); | |
2296 | val = CODING_ATTR_SAFE_CHARSETS (attrs); | |
2297 | this->max_charset_id = XSTRING (val)->size - 1; | |
2298 | this->safe_charsets = (char *) XSTRING (val)->data; | |
2299 | } | |
2300 | ||
2301 | /* A coding system of this category is always ASCII compatible. */ | |
2302 | src += coding->head_ascii; | |
3f003981 | 2303 | |
df7492f9 KH |
2304 | reg[0] = charset_ascii, reg[1] = reg[2] = reg[3] = -1; |
2305 | while (mask_iso && src < src_end) | |
4ed46869 | 2306 | { |
df7492f9 | 2307 | ONE_MORE_BYTE (c); |
4ed46869 KH |
2308 | switch (c) |
2309 | { | |
2310 | case ISO_CODE_ESC: | |
74383408 KH |
2311 | if (inhibit_iso_escape_detection) |
2312 | break; | |
f46869e4 | 2313 | single_shifting = 0; |
df7492f9 | 2314 | ONE_MORE_BYTE (c); |
d46c5b12 | 2315 | if (c >= '(' && c <= '/') |
4ed46869 | 2316 | { |
bf9cdd4e | 2317 | /* Designation sequence for a charset of dimension 1. */ |
df7492f9 | 2318 | ONE_MORE_BYTE (c1); |
d46c5b12 | 2319 | if (c1 < ' ' || c1 >= 0x80 |
df7492f9 | 2320 | || (id = iso_charset_table[0][c >= ','][c1]) < 0) |
d46c5b12 KH |
2321 | /* Invalid designation sequence. Just ignore. */ |
2322 | break; | |
df7492f9 | 2323 | reg[(c - '(') % 4] = id; |
bf9cdd4e KH |
2324 | } |
2325 | else if (c == '$') | |
2326 | { | |
2327 | /* Designation sequence for a charset of dimension 2. */ | |
df7492f9 | 2328 | ONE_MORE_BYTE (c); |
bf9cdd4e KH |
2329 | if (c >= '@' && c <= 'B') |
2330 | /* Designation for JISX0208.1978, GB2312, or JISX0208. */ | |
df7492f9 | 2331 | reg[0] = id = iso_charset_table[1][0][c]; |
bf9cdd4e | 2332 | else if (c >= '(' && c <= '/') |
bcf26d6a | 2333 | { |
df7492f9 | 2334 | ONE_MORE_BYTE (c1); |
d46c5b12 | 2335 | if (c1 < ' ' || c1 >= 0x80 |
df7492f9 | 2336 | || (id = iso_charset_table[1][c >= ','][c1]) < 0) |
d46c5b12 KH |
2337 | /* Invalid designation sequence. Just ignore. */ |
2338 | break; | |
df7492f9 | 2339 | reg[(c - '(') % 4] = id; |
bcf26d6a | 2340 | } |
bf9cdd4e | 2341 | else |
d46c5b12 KH |
2342 | /* Invalid designation sequence. Just ignore. */ |
2343 | break; | |
2344 | } | |
ae9ff118 | 2345 | else if (c == 'N' || c == 'O') |
d46c5b12 | 2346 | { |
ae9ff118 | 2347 | /* ESC <Fe> for SS2 or SS3. */ |
df7492f9 | 2348 | mask_iso &= CATEGORY_MASK_ISO_7_ELSE; |
d46c5b12 | 2349 | break; |
4ed46869 | 2350 | } |
ec6d2bb8 KH |
2351 | else if (c >= '0' && c <= '4') |
2352 | { | |
2353 | /* ESC <Fp> for start/end composition. */ | |
df7492f9 | 2354 | mask_found |= CATEGORY_MASK_ISO; |
ec6d2bb8 KH |
2355 | break; |
2356 | } | |
bf9cdd4e | 2357 | else |
df7492f9 KH |
2358 | { |
2359 | /* Invalid escape sequence. */ | |
2360 | mask_iso &= ~CATEGORY_MASK_ISO_ESCAPE; | |
2361 | break; | |
2362 | } | |
d46c5b12 KH |
2363 | |
2364 | /* We found a valid designation sequence for CHARSET. */ | |
df7492f9 KH |
2365 | mask_iso &= ~CATEGORY_MASK_ISO_8BIT; |
2366 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7], | |
2367 | id)) | |
2368 | mask_found |= CATEGORY_MASK_ISO_7; | |
d46c5b12 | 2369 | else |
df7492f9 KH |
2370 | mask_iso &= ~CATEGORY_MASK_ISO_7; |
2371 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7_tight], | |
2372 | id)) | |
2373 | mask_found |= CATEGORY_MASK_ISO_7_TIGHT; | |
d46c5b12 | 2374 | else |
df7492f9 KH |
2375 | mask_iso &= ~CATEGORY_MASK_ISO_7_TIGHT; |
2376 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7_else], | |
2377 | id)) | |
2378 | mask_found |= CATEGORY_MASK_ISO_7_ELSE; | |
ae9ff118 | 2379 | else |
df7492f9 KH |
2380 | mask_iso &= ~CATEGORY_MASK_ISO_7_ELSE; |
2381 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_8_else], | |
2382 | id)) | |
2383 | mask_found |= CATEGORY_MASK_ISO_8_ELSE; | |
ae9ff118 | 2384 | else |
df7492f9 | 2385 | mask_iso &= ~CATEGORY_MASK_ISO_8_ELSE; |
4ed46869 KH |
2386 | break; |
2387 | ||
4ed46869 | 2388 | case ISO_CODE_SO: |
74383408 KH |
2389 | if (inhibit_iso_escape_detection) |
2390 | break; | |
f46869e4 | 2391 | single_shifting = 0; |
d46c5b12 KH |
2392 | if (shift_out == 0 |
2393 | && (reg[1] >= 0 | |
df7492f9 KH |
2394 | || SHIFT_OUT_OK (coding_category_iso_7_else) |
2395 | || SHIFT_OUT_OK (coding_category_iso_8_else))) | |
d46c5b12 KH |
2396 | { |
2397 | /* Locking shift out. */ | |
df7492f9 KH |
2398 | mask_iso &= ~CATEGORY_MASK_ISO_7BIT; |
2399 | mask_found |= CATEGORY_MASK_ISO_ELSE; | |
d46c5b12 | 2400 | } |
e0e989f6 | 2401 | break; |
df7492f9 | 2402 | |
d46c5b12 | 2403 | case ISO_CODE_SI: |
74383408 KH |
2404 | if (inhibit_iso_escape_detection) |
2405 | break; | |
f46869e4 | 2406 | single_shifting = 0; |
d46c5b12 KH |
2407 | if (shift_out == 1) |
2408 | { | |
2409 | /* Locking shift in. */ | |
df7492f9 KH |
2410 | mask_iso &= ~CATEGORY_MASK_ISO_7BIT; |
2411 | mask_found |= CATEGORY_MASK_ISO_ELSE; | |
d46c5b12 KH |
2412 | } |
2413 | break; | |
2414 | ||
4ed46869 | 2415 | case ISO_CODE_CSI: |
f46869e4 | 2416 | single_shifting = 0; |
4ed46869 KH |
2417 | case ISO_CODE_SS2: |
2418 | case ISO_CODE_SS3: | |
3f003981 | 2419 | { |
df7492f9 | 2420 | int newmask = CATEGORY_MASK_ISO_8_ELSE; |
3f003981 | 2421 | |
74383408 KH |
2422 | if (inhibit_iso_escape_detection) |
2423 | break; | |
70c22245 KH |
2424 | if (c != ISO_CODE_CSI) |
2425 | { | |
df7492f9 KH |
2426 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_1]) |
2427 | & CODING_ISO_FLAG_SINGLE_SHIFT) | |
2428 | newmask |= CATEGORY_MASK_ISO_8_1; | |
2429 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_2]) | |
2430 | & CODING_ISO_FLAG_SINGLE_SHIFT) | |
2431 | newmask |= CATEGORY_MASK_ISO_8_2; | |
f46869e4 | 2432 | single_shifting = 1; |
70c22245 | 2433 | } |
3f003981 KH |
2434 | if (VECTORP (Vlatin_extra_code_table) |
2435 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
2436 | { | |
df7492f9 KH |
2437 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_1]) |
2438 | & CODING_ISO_FLAG_LATIN_EXTRA) | |
2439 | newmask |= CATEGORY_MASK_ISO_8_1; | |
2440 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_2]) | |
2441 | & CODING_ISO_FLAG_LATIN_EXTRA) | |
2442 | newmask |= CATEGORY_MASK_ISO_8_2; | |
3f003981 | 2443 | } |
df7492f9 | 2444 | mask_iso &= newmask; |
d46c5b12 | 2445 | mask_found |= newmask; |
3f003981 KH |
2446 | } |
2447 | break; | |
4ed46869 KH |
2448 | |
2449 | default: | |
2450 | if (c < 0x80) | |
f46869e4 KH |
2451 | { |
2452 | single_shifting = 0; | |
2453 | break; | |
2454 | } | |
4ed46869 | 2455 | else if (c < 0xA0) |
c4825358 | 2456 | { |
f46869e4 | 2457 | single_shifting = 0; |
df7492f9 | 2458 | mask_8bit_found = 1; |
3f003981 KH |
2459 | if (VECTORP (Vlatin_extra_code_table) |
2460 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
c4825358 | 2461 | { |
3f003981 KH |
2462 | int newmask = 0; |
2463 | ||
df7492f9 KH |
2464 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_1]) |
2465 | & CODING_ISO_FLAG_LATIN_EXTRA) | |
2466 | newmask |= CATEGORY_MASK_ISO_8_1; | |
2467 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_2]) | |
2468 | & CODING_ISO_FLAG_LATIN_EXTRA) | |
2469 | newmask |= CATEGORY_MASK_ISO_8_2; | |
2470 | mask_iso &= newmask; | |
d46c5b12 | 2471 | mask_found |= newmask; |
c4825358 | 2472 | } |
3f003981 KH |
2473 | else |
2474 | return 0; | |
c4825358 | 2475 | } |
4ed46869 KH |
2476 | else |
2477 | { | |
df7492f9 KH |
2478 | mask_iso &= ~(CATEGORY_MASK_ISO_7BIT |
2479 | | CATEGORY_MASK_ISO_7_ELSE); | |
2480 | mask_found |= CATEGORY_MASK_ISO_8_1; | |
2481 | mask_8bit_found = 1; | |
f46869e4 KH |
2482 | /* Check the length of succeeding codes of the range |
2483 | 0xA0..0FF. If the byte length is odd, we exclude | |
df7492f9 | 2484 | CATEGORY_MASK_ISO_8_2. We can check this only |
f46869e4 | 2485 | when we are not single shifting. */ |
b73bfc1c | 2486 | if (!single_shifting |
df7492f9 | 2487 | && mask_iso & CATEGORY_MASK_ISO_8_2) |
f46869e4 | 2488 | { |
e17de821 | 2489 | int i = 1; |
b73bfc1c KH |
2490 | while (src < src_end) |
2491 | { | |
df7492f9 | 2492 | ONE_MORE_BYTE (c); |
b73bfc1c KH |
2493 | if (c < 0xA0) |
2494 | break; | |
2495 | i++; | |
2496 | } | |
2497 | ||
2498 | if (i & 1 && src < src_end) | |
df7492f9 | 2499 | mask_iso &= ~CATEGORY_MASK_ISO_8_2; |
f46869e4 | 2500 | else |
df7492f9 | 2501 | mask_found |= CATEGORY_MASK_ISO_8_2; |
f46869e4 | 2502 | } |
4ed46869 KH |
2503 | } |
2504 | break; | |
2505 | } | |
2506 | } | |
df7492f9 KH |
2507 | no_more_source: |
2508 | if (!mask_iso) | |
2509 | { | |
2510 | *mask &= ~CATEGORY_MASK_ISO; | |
2511 | return 0; | |
2512 | } | |
2513 | if (!mask_found) | |
2514 | return 0; | |
2515 | *mask &= mask_iso & mask_found; | |
2516 | if (! mask_8bit_found) | |
2517 | *mask &= ~(CATEGORY_MASK_ISO_8BIT | CATEGORY_MASK_ISO_8_ELSE); | |
2518 | return 1; | |
4ed46869 KH |
2519 | } |
2520 | ||
4ed46869 KH |
2521 | |
2522 | /* Set designation state into CODING. */ | |
df7492f9 KH |
2523 | #define DECODE_DESIGNATION(reg, dim, chars_96, final) \ |
2524 | do { \ | |
2525 | int id, prev; \ | |
2526 | \ | |
2527 | if (final < '0' || final >= 128 \ | |
2528 | || ((id = ISO_CHARSET_TABLE (dim, chars_96, final)) < 0) \ | |
2529 | || !SAFE_CHARSET_P (coding, id)) \ | |
2530 | { \ | |
2531 | CODING_ISO_DESIGNATION (coding, reg) = -2; \ | |
2532 | goto invalid_code; \ | |
2533 | } \ | |
2534 | prev = CODING_ISO_DESIGNATION (coding, reg); \ | |
2535 | CODING_ISO_DESIGNATION (coding, reg) = id; \ | |
2536 | /* If there was an invalid designation to REG previously, and this \ | |
2537 | designation is ASCII to REG, we should keep this designation \ | |
2538 | sequence. */ \ | |
2539 | if (prev == -2 && id == charset_ascii) \ | |
2540 | goto invalid_code; \ | |
4ed46869 KH |
2541 | } while (0) |
2542 | ||
d46c5b12 | 2543 | |
df7492f9 KH |
2544 | #define MAYBE_FINISH_COMPOSITION() \ |
2545 | do { \ | |
2546 | int i; \ | |
2547 | if (composition_state == COMPOSING_NO) \ | |
2548 | break; \ | |
2549 | /* It is assured that we have enough room for producing \ | |
2550 | characters stored in the table `components'. */ \ | |
2551 | if (charbuf + component_idx > charbuf_end) \ | |
2552 | goto no_more_source; \ | |
2553 | composition_state = COMPOSING_NO; \ | |
2554 | if (method == COMPOSITION_RELATIVE \ | |
2555 | || method == COMPOSITION_WITH_ALTCHARS) \ | |
2556 | { \ | |
2557 | for (i = 0; i < component_idx; i++) \ | |
2558 | *charbuf++ = components[i]; \ | |
2559 | char_offset += component_idx; \ | |
2560 | } \ | |
2561 | else \ | |
2562 | { \ | |
2563 | for (i = 0; i < component_idx; i += 2) \ | |
2564 | *charbuf++ = components[i]; \ | |
2565 | char_offset += (component_idx / 2) + 1; \ | |
2566 | } \ | |
2567 | } while (0) | |
2568 | ||
d46c5b12 | 2569 | |
aa72b389 KH |
2570 | /* Handle composition start sequence ESC 0, ESC 2, ESC 3, or ESC 4. |
2571 | ESC 0 : relative composition : ESC 0 CHAR ... ESC 1 | |
2572 | ESC 2 : rulebase composition : ESC 2 CHAR RULE CHAR RULE ... CHAR ESC 1 | |
df7492f9 KH |
2573 | ESC 3 : altchar composition : ESC 3 CHAR ... ESC 0 CHAR ... ESC 1 |
2574 | ESC 4 : alt&rule composition : ESC 4 CHAR RULE ... CHAR ESC 0 CHAR ... ESC 1 | |
aa72b389 | 2575 | */ |
ec6d2bb8 | 2576 | |
df7492f9 KH |
2577 | #define DECODE_COMPOSITION_START(c1) \ |
2578 | do { \ | |
2579 | if (c1 == '0' \ | |
2580 | && composition_state == COMPOSING_COMPONENT_CHAR) \ | |
2581 | { \ | |
2582 | component_len = component_idx; \ | |
2583 | composition_state = COMPOSING_CHAR; \ | |
2584 | } \ | |
2585 | else \ | |
2586 | { \ | |
2587 | unsigned char *p; \ | |
2588 | \ | |
2589 | MAYBE_FINISH_COMPOSITION (); \ | |
2590 | if (charbuf + MAX_COMPOSITION_COMPONENTS > charbuf_end) \ | |
2591 | goto no_more_source; \ | |
2592 | for (p = src; p < src_end - 1; p++) \ | |
2593 | if (*p == ISO_CODE_ESC && p[1] == '1') \ | |
2594 | break; \ | |
2595 | if (p == src_end - 1) \ | |
2596 | { \ | |
2597 | if (coding->mode & CODING_MODE_LAST_BLOCK) \ | |
2598 | goto invalid_code; \ | |
2599 | goto no_more_source; \ | |
2600 | } \ | |
2601 | \ | |
2602 | /* This is surely the start of a composition. */ \ | |
2603 | method = (c1 == '0' ? COMPOSITION_RELATIVE \ | |
2604 | : c1 == '2' ? COMPOSITION_WITH_RULE \ | |
2605 | : c1 == '3' ? COMPOSITION_WITH_ALTCHARS \ | |
2606 | : COMPOSITION_WITH_RULE_ALTCHARS); \ | |
2607 | composition_state = (c1 <= '2' ? COMPOSING_CHAR \ | |
2608 | : COMPOSING_COMPONENT_CHAR); \ | |
2609 | component_idx = component_len = 0; \ | |
2610 | } \ | |
ec6d2bb8 KH |
2611 | } while (0) |
2612 | ||
ec6d2bb8 | 2613 | |
df7492f9 KH |
2614 | /* Handle compositoin end sequence ESC 1. */ |
2615 | ||
2616 | #define DECODE_COMPOSITION_END() \ | |
ec6d2bb8 | 2617 | do { \ |
df7492f9 KH |
2618 | int nchars = (component_len > 0 ? component_idx - component_len \ |
2619 | : method == COMPOSITION_RELATIVE ? component_idx \ | |
2620 | : (component_idx + 1) / 2); \ | |
2621 | int i; \ | |
2622 | int *saved_charbuf = charbuf; \ | |
2623 | \ | |
2624 | ADD_COMPOSITION_DATA (charbuf, method, nchars); \ | |
2625 | if (method != COMPOSITION_RELATIVE) \ | |
ec6d2bb8 | 2626 | { \ |
df7492f9 KH |
2627 | if (component_len == 0) \ |
2628 | for (i = 0; i < component_idx; i++) \ | |
2629 | *charbuf++ = components[i]; \ | |
2630 | else \ | |
2631 | for (i = 0; i < component_len; i++) \ | |
2632 | *charbuf++ = components[i]; \ | |
2633 | *saved_charbuf = saved_charbuf - charbuf; \ | |
ec6d2bb8 | 2634 | } \ |
df7492f9 KH |
2635 | if (method == COMPOSITION_WITH_RULE) \ |
2636 | for (i = 0; i < component_idx; i += 2, char_offset++) \ | |
2637 | *charbuf++ = components[i]; \ | |
ec6d2bb8 | 2638 | else \ |
df7492f9 KH |
2639 | for (i = component_len; i < component_idx; i++, char_offset++) \ |
2640 | *charbuf++ = components[i]; \ | |
2641 | coding->annotated = 1; \ | |
2642 | composition_state = COMPOSING_NO; \ | |
ec6d2bb8 KH |
2643 | } while (0) |
2644 | ||
df7492f9 | 2645 | |
ec6d2bb8 KH |
2646 | /* Decode a composition rule from the byte C1 (and maybe one more byte |
2647 | from SRC) and store one encoded composition rule in | |
2648 | coding->cmp_data. */ | |
2649 | ||
2650 | #define DECODE_COMPOSITION_RULE(c1) \ | |
2651 | do { \ | |
ec6d2bb8 KH |
2652 | (c1) -= 32; \ |
2653 | if (c1 < 81) /* old format (before ver.21) */ \ | |
2654 | { \ | |
2655 | int gref = (c1) / 9; \ | |
2656 | int nref = (c1) % 9; \ | |
2657 | if (gref == 4) gref = 10; \ | |
2658 | if (nref == 4) nref = 10; \ | |
df7492f9 | 2659 | c1 = COMPOSITION_ENCODE_RULE (gref, nref); \ |
ec6d2bb8 | 2660 | } \ |
b73bfc1c | 2661 | else if (c1 < 93) /* new format (after ver.21) */ \ |
ec6d2bb8 KH |
2662 | { \ |
2663 | ONE_MORE_BYTE (c2); \ | |
df7492f9 | 2664 | c1 = COMPOSITION_ENCODE_RULE (c1 - 81, c2 - 32); \ |
ec6d2bb8 | 2665 | } \ |
df7492f9 KH |
2666 | else \ |
2667 | c1 = 0; \ | |
ec6d2bb8 | 2668 | } while (0) |
88993dfd | 2669 | |
d46c5b12 | 2670 | |
4ed46869 KH |
2671 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
2672 | ||
b73bfc1c | 2673 | static void |
df7492f9 | 2674 | decode_coding_iso_2022 (coding) |
4ed46869 | 2675 | struct coding_system *coding; |
4ed46869 | 2676 | { |
df7492f9 KH |
2677 | unsigned char *src = coding->source + coding->consumed; |
2678 | unsigned char *src_end = coding->source + coding->src_bytes; | |
b73bfc1c | 2679 | unsigned char *src_base; |
df7492f9 KH |
2680 | int *charbuf = coding->charbuf; |
2681 | int *charbuf_end = charbuf + coding->charbuf_size - 4; | |
2682 | int consumed_chars = 0, consumed_chars_base; | |
2683 | int char_offset = 0; | |
2684 | int multibytep = coding->src_multibyte; | |
2685 | /* Charsets invoked to graphic plane 0 and 1 respectively. */ | |
2686 | int charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
2687 | int charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
2688 | struct charset *charset; | |
2689 | int c; | |
2690 | /* For handling composition sequence. */ | |
2691 | #define COMPOSING_NO 0 | |
2692 | #define COMPOSING_CHAR 1 | |
2693 | #define COMPOSING_RULE 2 | |
2694 | #define COMPOSING_COMPONENT_CHAR 3 | |
2695 | #define COMPOSING_COMPONENT_RULE 4 | |
2696 | ||
2697 | int composition_state = COMPOSING_NO; | |
2698 | enum composition_method method; | |
2699 | int components[MAX_COMPOSITION_COMPONENTS * 2 + 1]; | |
2700 | int component_idx; | |
2701 | int component_len; | |
2702 | Lisp_Object attrs, eol_type, charset_list; | |
2703 | ||
2704 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
2705 | setup_iso_safe_charsets (attrs); | |
b73bfc1c KH |
2706 | |
2707 | while (1) | |
4ed46869 | 2708 | { |
b73bfc1c KH |
2709 | int c1, c2; |
2710 | ||
2711 | src_base = src; | |
df7492f9 KH |
2712 | consumed_chars_base = consumed_chars; |
2713 | ||
2714 | if (charbuf >= charbuf_end) | |
2715 | break; | |
2716 | ||
b73bfc1c | 2717 | ONE_MORE_BYTE (c1); |
4ed46869 | 2718 | |
ec6d2bb8 | 2719 | /* We produce no character or one character. */ |
4ed46869 KH |
2720 | switch (iso_code_class [c1]) |
2721 | { | |
2722 | case ISO_0x20_or_0x7F: | |
df7492f9 | 2723 | if (composition_state != COMPOSING_NO) |
ec6d2bb8 | 2724 | { |
df7492f9 KH |
2725 | if (composition_state == COMPOSING_RULE |
2726 | || composition_state == COMPOSING_COMPONENT_RULE) | |
2727 | { | |
2728 | DECODE_COMPOSITION_RULE (c1); | |
2729 | components[component_idx++] = c1; | |
2730 | composition_state--; | |
2731 | continue; | |
2732 | } | |
2733 | else if (method == COMPOSITION_WITH_RULE) | |
2734 | composition_state = COMPOSING_RULE; | |
2735 | else if (method == COMPOSITION_WITH_RULE_ALTCHARS | |
2736 | && composition_state == COMPOSING_COMPONENT_CHAR) | |
2737 | composition_state = COMPOSING_COMPONENT_CHAR; | |
ec6d2bb8 | 2738 | } |
df7492f9 KH |
2739 | if (charset_id_0 < 0 |
2740 | || ! CHARSET_ISO_CHARS_96 (CHARSET_FROM_ID (charset_id_0))) | |
4ed46869 KH |
2741 | { |
2742 | /* This is SPACE or DEL. */ | |
df7492f9 | 2743 | charset = CHARSET_FROM_ID (charset_ascii); |
4ed46869 KH |
2744 | break; |
2745 | } | |
2746 | /* This is a graphic character, we fall down ... */ | |
2747 | ||
2748 | case ISO_graphic_plane_0: | |
df7492f9 | 2749 | if (composition_state == COMPOSING_RULE) |
b73bfc1c KH |
2750 | { |
2751 | DECODE_COMPOSITION_RULE (c1); | |
df7492f9 KH |
2752 | components[component_idx++] = c1; |
2753 | composition_state = COMPOSING_CHAR; | |
b73bfc1c | 2754 | } |
df7492f9 | 2755 | charset = CHARSET_FROM_ID (charset_id_0); |
4ed46869 KH |
2756 | break; |
2757 | ||
2758 | case ISO_0xA0_or_0xFF: | |
df7492f9 KH |
2759 | if (charset_id_1 < 0 |
2760 | || ! CHARSET_ISO_CHARS_96 (CHARSET_FROM_ID (charset_id_1)) | |
2761 | || CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) | |
2762 | goto invalid_code; | |
4ed46869 KH |
2763 | /* This is a graphic character, we fall down ... */ |
2764 | ||
2765 | case ISO_graphic_plane_1: | |
df7492f9 KH |
2766 | if (charset_id_1 < 0) |
2767 | goto invalid_code; | |
2768 | charset = CHARSET_FROM_ID (charset_id_1); | |
4ed46869 KH |
2769 | break; |
2770 | ||
2771 | case ISO_carriage_return: | |
df7492f9 | 2772 | if (c1 == '\r') |
4ed46869 | 2773 | { |
df7492f9 | 2774 | if (EQ (eol_type, Qdos)) |
4ed46869 | 2775 | { |
df7492f9 KH |
2776 | if (src == src_end) |
2777 | goto no_more_source; | |
2778 | if (*src == '\n') | |
2779 | ONE_MORE_BYTE (c1); | |
4ed46869 | 2780 | } |
df7492f9 KH |
2781 | else if (EQ (eol_type, Qmac)) |
2782 | c1 = '\n'; | |
4ed46869 | 2783 | } |
df7492f9 KH |
2784 | /* fall through */ |
2785 | ||
2786 | case ISO_control_0: | |
2787 | MAYBE_FINISH_COMPOSITION (); | |
2788 | charset = CHARSET_FROM_ID (charset_ascii); | |
4ed46869 KH |
2789 | break; |
2790 | ||
df7492f9 KH |
2791 | case ISO_control_1: |
2792 | MAYBE_FINISH_COMPOSITION (); | |
2793 | goto invalid_code; | |
2794 | ||
4ed46869 | 2795 | case ISO_shift_out: |
df7492f9 KH |
2796 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
2797 | || CODING_ISO_DESIGNATION (coding, 1) < 0) | |
2798 | goto invalid_code; | |
2799 | CODING_ISO_INVOCATION (coding, 0) = 1; | |
2800 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 2801 | continue; |
4ed46869 KH |
2802 | |
2803 | case ISO_shift_in: | |
df7492f9 KH |
2804 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT)) |
2805 | goto invalid_code; | |
2806 | CODING_ISO_INVOCATION (coding, 0) = 0; | |
2807 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 2808 | continue; |
4ed46869 KH |
2809 | |
2810 | case ISO_single_shift_2_7: | |
2811 | case ISO_single_shift_2: | |
df7492f9 KH |
2812 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT)) |
2813 | goto invalid_code; | |
4ed46869 KH |
2814 | /* SS2 is handled as an escape sequence of ESC 'N' */ |
2815 | c1 = 'N'; | |
2816 | goto label_escape_sequence; | |
2817 | ||
2818 | case ISO_single_shift_3: | |
df7492f9 KH |
2819 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT)) |
2820 | goto invalid_code; | |
4ed46869 KH |
2821 | /* SS2 is handled as an escape sequence of ESC 'O' */ |
2822 | c1 = 'O'; | |
2823 | goto label_escape_sequence; | |
2824 | ||
2825 | case ISO_control_sequence_introducer: | |
2826 | /* CSI is handled as an escape sequence of ESC '[' ... */ | |
2827 | c1 = '['; | |
2828 | goto label_escape_sequence; | |
2829 | ||
2830 | case ISO_escape: | |
2831 | ONE_MORE_BYTE (c1); | |
2832 | label_escape_sequence: | |
df7492f9 | 2833 | /* Escape sequences handled here are invocation, |
4ed46869 KH |
2834 | designation, direction specification, and character |
2835 | composition specification. */ | |
2836 | switch (c1) | |
2837 | { | |
2838 | case '&': /* revision of following character set */ | |
2839 | ONE_MORE_BYTE (c1); | |
2840 | if (!(c1 >= '@' && c1 <= '~')) | |
df7492f9 | 2841 | goto invalid_code; |
4ed46869 KH |
2842 | ONE_MORE_BYTE (c1); |
2843 | if (c1 != ISO_CODE_ESC) | |
df7492f9 | 2844 | goto invalid_code; |
4ed46869 KH |
2845 | ONE_MORE_BYTE (c1); |
2846 | goto label_escape_sequence; | |
2847 | ||
2848 | case '$': /* designation of 2-byte character set */ | |
df7492f9 KH |
2849 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATION)) |
2850 | goto invalid_code; | |
4ed46869 KH |
2851 | ONE_MORE_BYTE (c1); |
2852 | if (c1 >= '@' && c1 <= 'B') | |
2853 | { /* designation of JISX0208.1978, GB2312.1980, | |
88993dfd | 2854 | or JISX0208.1980 */ |
df7492f9 | 2855 | DECODE_DESIGNATION (0, 2, 0, c1); |
4ed46869 KH |
2856 | } |
2857 | else if (c1 >= 0x28 && c1 <= 0x2B) | |
2858 | { /* designation of DIMENSION2_CHARS94 character set */ | |
2859 | ONE_MORE_BYTE (c2); | |
df7492f9 | 2860 | DECODE_DESIGNATION (c1 - 0x28, 2, 0, c2); |
4ed46869 KH |
2861 | } |
2862 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
2863 | { /* designation of DIMENSION2_CHARS96 character set */ | |
2864 | ONE_MORE_BYTE (c2); | |
df7492f9 | 2865 | DECODE_DESIGNATION (c1 - 0x2C, 2, 1, c2); |
4ed46869 KH |
2866 | } |
2867 | else | |
df7492f9 | 2868 | goto invalid_code; |
b73bfc1c | 2869 | /* We must update these variables now. */ |
df7492f9 KH |
2870 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); |
2871 | charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
b73bfc1c | 2872 | continue; |
4ed46869 KH |
2873 | |
2874 | case 'n': /* invocation of locking-shift-2 */ | |
df7492f9 KH |
2875 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
2876 | || CODING_ISO_DESIGNATION (coding, 2) < 0) | |
2877 | goto invalid_code; | |
2878 | CODING_ISO_INVOCATION (coding, 0) = 2; | |
2879 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 2880 | continue; |
4ed46869 KH |
2881 | |
2882 | case 'o': /* invocation of locking-shift-3 */ | |
df7492f9 KH |
2883 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
2884 | || CODING_ISO_DESIGNATION (coding, 3) < 0) | |
2885 | goto invalid_code; | |
2886 | CODING_ISO_INVOCATION (coding, 0) = 3; | |
2887 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 2888 | continue; |
4ed46869 KH |
2889 | |
2890 | case 'N': /* invocation of single-shift-2 */ | |
df7492f9 KH |
2891 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
2892 | || CODING_ISO_DESIGNATION (coding, 2) < 0) | |
2893 | goto invalid_code; | |
2894 | charset = CHARSET_FROM_ID (CODING_ISO_DESIGNATION (coding, 2)); | |
b73bfc1c | 2895 | ONE_MORE_BYTE (c1); |
e7046a18 | 2896 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
df7492f9 | 2897 | goto invalid_code; |
4ed46869 KH |
2898 | break; |
2899 | ||
2900 | case 'O': /* invocation of single-shift-3 */ | |
df7492f9 KH |
2901 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
2902 | || CODING_ISO_DESIGNATION (coding, 3) < 0) | |
2903 | goto invalid_code; | |
2904 | charset = CHARSET_FROM_ID (CODING_ISO_DESIGNATION (coding, 3)); | |
b73bfc1c | 2905 | ONE_MORE_BYTE (c1); |
e7046a18 | 2906 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
df7492f9 | 2907 | goto invalid_code; |
4ed46869 KH |
2908 | break; |
2909 | ||
ec6d2bb8 | 2910 | case '0': case '2': case '3': case '4': /* start composition */ |
df7492f9 KH |
2911 | if (! (coding->common_flags & CODING_ANNOTATE_COMPOSITION_MASK)) |
2912 | goto invalid_code; | |
ec6d2bb8 | 2913 | DECODE_COMPOSITION_START (c1); |
b73bfc1c | 2914 | continue; |
4ed46869 | 2915 | |
ec6d2bb8 | 2916 | case '1': /* end composition */ |
df7492f9 KH |
2917 | if (composition_state == COMPOSING_NO) |
2918 | goto invalid_code; | |
2919 | DECODE_COMPOSITION_END (); | |
b73bfc1c | 2920 | continue; |
4ed46869 KH |
2921 | |
2922 | case '[': /* specification of direction */ | |
df7492f9 KH |
2923 | if (! CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DIRECTION) |
2924 | goto invalid_code; | |
4ed46869 | 2925 | /* For the moment, nested direction is not supported. |
d46c5b12 | 2926 | So, `coding->mode & CODING_MODE_DIRECTION' zero means |
df7492f9 | 2927 | left-to-right, and nozero means right-to-left. */ |
4ed46869 KH |
2928 | ONE_MORE_BYTE (c1); |
2929 | switch (c1) | |
2930 | { | |
2931 | case ']': /* end of the current direction */ | |
d46c5b12 | 2932 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 KH |
2933 | |
2934 | case '0': /* end of the current direction */ | |
2935 | case '1': /* start of left-to-right direction */ | |
2936 | ONE_MORE_BYTE (c1); | |
2937 | if (c1 == ']') | |
d46c5b12 | 2938 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 | 2939 | else |
df7492f9 | 2940 | goto invalid_code; |
4ed46869 KH |
2941 | break; |
2942 | ||
2943 | case '2': /* start of right-to-left direction */ | |
2944 | ONE_MORE_BYTE (c1); | |
2945 | if (c1 == ']') | |
d46c5b12 | 2946 | coding->mode |= CODING_MODE_DIRECTION; |
4ed46869 | 2947 | else |
df7492f9 | 2948 | goto invalid_code; |
4ed46869 KH |
2949 | break; |
2950 | ||
2951 | default: | |
df7492f9 | 2952 | goto invalid_code; |
4ed46869 | 2953 | } |
b73bfc1c | 2954 | continue; |
4ed46869 KH |
2955 | |
2956 | default: | |
df7492f9 KH |
2957 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATION)) |
2958 | goto invalid_code; | |
4ed46869 KH |
2959 | if (c1 >= 0x28 && c1 <= 0x2B) |
2960 | { /* designation of DIMENSION1_CHARS94 character set */ | |
2961 | ONE_MORE_BYTE (c2); | |
df7492f9 | 2962 | DECODE_DESIGNATION (c1 - 0x28, 1, 0, c2); |
4ed46869 KH |
2963 | } |
2964 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
2965 | { /* designation of DIMENSION1_CHARS96 character set */ | |
2966 | ONE_MORE_BYTE (c2); | |
df7492f9 | 2967 | DECODE_DESIGNATION (c1 - 0x2C, 1, 1, c2); |
4ed46869 KH |
2968 | } |
2969 | else | |
df7492f9 | 2970 | goto invalid_code; |
b73bfc1c | 2971 | /* We must update these variables now. */ |
df7492f9 KH |
2972 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); |
2973 | charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
b73bfc1c | 2974 | continue; |
4ed46869 | 2975 | } |
b73bfc1c | 2976 | } |
4ed46869 | 2977 | |
b73bfc1c | 2978 | /* Now we know CHARSET and 1st position code C1 of a character. |
df7492f9 KH |
2979 | Produce a decoded character while getting 2nd position code |
2980 | C2 if necessary. */ | |
2981 | c1 &= 0x7F; | |
2982 | if (CHARSET_DIMENSION (charset) > 1) | |
b73bfc1c KH |
2983 | { |
2984 | ONE_MORE_BYTE (c2); | |
df7492f9 | 2985 | if (c2 < 0x20 || (c2 >= 0x80 && c2 < 0xA0)) |
b73bfc1c | 2986 | /* C2 is not in a valid range. */ |
df7492f9 KH |
2987 | goto invalid_code; |
2988 | c1 = (c1 << 8) | (c2 & 0x7F); | |
2989 | if (CHARSET_DIMENSION (charset) > 2) | |
2990 | { | |
2991 | ONE_MORE_BYTE (c2); | |
2992 | if (c2 < 0x20 || (c2 >= 0x80 && c2 < 0xA0)) | |
2993 | /* C2 is not in a valid range. */ | |
2994 | goto invalid_code; | |
2995 | c1 = (c1 << 8) | (c2 & 0x7F); | |
2996 | } | |
2997 | } | |
2998 | ||
2999 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c1, c); | |
3000 | if (c < 0) | |
3001 | { | |
3002 | MAYBE_FINISH_COMPOSITION (); | |
3003 | for (; src_base < src; src_base++, char_offset++) | |
3004 | { | |
3005 | if (ASCII_BYTE_P (*src_base)) | |
3006 | *charbuf++ = *src_base; | |
3007 | else | |
3008 | *charbuf++ = BYTE8_TO_CHAR (*src_base); | |
3009 | } | |
3010 | } | |
3011 | else if (composition_state == COMPOSING_NO) | |
3012 | { | |
3013 | *charbuf++ = c; | |
3014 | char_offset++; | |
4ed46869 | 3015 | } |
df7492f9 KH |
3016 | else |
3017 | components[component_idx++] = c; | |
4ed46869 KH |
3018 | continue; |
3019 | ||
df7492f9 KH |
3020 | invalid_code: |
3021 | MAYBE_FINISH_COMPOSITION (); | |
4ed46869 | 3022 | src = src_base; |
df7492f9 KH |
3023 | consumed_chars = consumed_chars_base; |
3024 | ONE_MORE_BYTE (c); | |
3025 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
3026 | coding->errors++; | |
4ed46869 | 3027 | } |
fb88bf2d | 3028 | |
df7492f9 KH |
3029 | no_more_source: |
3030 | coding->consumed_char += consumed_chars_base; | |
3031 | coding->consumed = src_base - coding->source; | |
3032 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
3033 | } |
3034 | ||
b73bfc1c | 3035 | |
f4dee582 | 3036 | /* ISO2022 encoding stuff. */ |
4ed46869 KH |
3037 | |
3038 | /* | |
f4dee582 | 3039 | It is not enough to say just "ISO2022" on encoding, we have to |
df7492f9 | 3040 | specify more details. In Emacs, each coding system of ISO2022 |
4ed46869 | 3041 | variant has the following specifications: |
df7492f9 | 3042 | 1. Initial designation to G0 thru G3. |
4ed46869 KH |
3043 | 2. Allows short-form designation? |
3044 | 3. ASCII should be designated to G0 before control characters? | |
3045 | 4. ASCII should be designated to G0 at end of line? | |
3046 | 5. 7-bit environment or 8-bit environment? | |
3047 | 6. Use locking-shift? | |
3048 | 7. Use Single-shift? | |
3049 | And the following two are only for Japanese: | |
3050 | 8. Use ASCII in place of JIS0201-1976-Roman? | |
3051 | 9. Use JISX0208-1983 in place of JISX0208-1978? | |
df7492f9 KH |
3052 | These specifications are encoded in CODING_ISO_FLAGS (coding) as flag bits |
3053 | defined by macros CODING_ISO_FLAG_XXX. See `coding.h' for more | |
f4dee582 | 3054 | details. |
4ed46869 KH |
3055 | */ |
3056 | ||
3057 | /* Produce codes (escape sequence) for designating CHARSET to graphic | |
b73bfc1c KH |
3058 | register REG at DST, and increment DST. If <final-char> of CHARSET is |
3059 | '@', 'A', or 'B' and the coding system CODING allows, produce | |
3060 | designation sequence of short-form. */ | |
4ed46869 KH |
3061 | |
3062 | #define ENCODE_DESIGNATION(charset, reg, coding) \ | |
3063 | do { \ | |
df7492f9 | 3064 | unsigned char final_char = CHARSET_ISO_FINAL (charset); \ |
4ed46869 KH |
3065 | char *intermediate_char_94 = "()*+"; \ |
3066 | char *intermediate_char_96 = ",-./"; \ | |
df7492f9 KH |
3067 | int revision = -1; \ |
3068 | int c; \ | |
3069 | \ | |
3070 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_REVISION) \ | |
3071 | revision = XINT (CHARSET_ISO_REVISION (charset)); \ | |
3072 | \ | |
3073 | if (revision >= 0) \ | |
70c22245 | 3074 | { \ |
df7492f9 KH |
3075 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, '&'); \ |
3076 | EMIT_ONE_BYTE ('@' + revision); \ | |
4ed46869 | 3077 | } \ |
df7492f9 | 3078 | EMIT_ONE_ASCII_BYTE (ISO_CODE_ESC); \ |
4ed46869 KH |
3079 | if (CHARSET_DIMENSION (charset) == 1) \ |
3080 | { \ | |
df7492f9 KH |
3081 | if (! CHARSET_ISO_CHARS_96 (charset)) \ |
3082 | c = intermediate_char_94[reg]; \ | |
4ed46869 | 3083 | else \ |
df7492f9 KH |
3084 | c = intermediate_char_96[reg]; \ |
3085 | EMIT_ONE_ASCII_BYTE (c); \ | |
4ed46869 KH |
3086 | } \ |
3087 | else \ | |
3088 | { \ | |
df7492f9 KH |
3089 | EMIT_ONE_ASCII_BYTE ('$'); \ |
3090 | if (! CHARSET_ISO_CHARS_96 (charset)) \ | |
4ed46869 | 3091 | { \ |
df7492f9 | 3092 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LONG_FORM \ |
b73bfc1c KH |
3093 | || reg != 0 \ |
3094 | || final_char < '@' || final_char > 'B') \ | |
df7492f9 | 3095 | EMIT_ONE_ASCII_BYTE (intermediate_char_94[reg]); \ |
4ed46869 KH |
3096 | } \ |
3097 | else \ | |
df7492f9 | 3098 | EMIT_ONE_ASCII_BYTE (intermediate_char_96[reg]); \ |
4ed46869 | 3099 | } \ |
df7492f9 KH |
3100 | EMIT_ONE_ASCII_BYTE (final_char); \ |
3101 | \ | |
3102 | CODING_ISO_DESIGNATION (coding, reg) = CHARSET_ID (charset); \ | |
4ed46869 KH |
3103 | } while (0) |
3104 | ||
df7492f9 | 3105 | |
4ed46869 KH |
3106 | /* The following two macros produce codes (control character or escape |
3107 | sequence) for ISO2022 single-shift functions (single-shift-2 and | |
3108 | single-shift-3). */ | |
3109 | ||
df7492f9 KH |
3110 | #define ENCODE_SINGLE_SHIFT_2 \ |
3111 | do { \ | |
3112 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ | |
3113 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'N'); \ | |
3114 | else \ | |
3115 | EMIT_ONE_BYTE (ISO_CODE_SS2); \ | |
3116 | CODING_ISO_SINGLE_SHIFTING (coding) = 1; \ | |
4ed46869 KH |
3117 | } while (0) |
3118 | ||
df7492f9 KH |
3119 | |
3120 | #define ENCODE_SINGLE_SHIFT_3 \ | |
3121 | do { \ | |
3122 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ | |
3123 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'O'); \ | |
3124 | else \ | |
3125 | EMIT_ONE_BYTE (ISO_CODE_SS3); \ | |
3126 | CODING_ISO_SINGLE_SHIFTING (coding) = 1; \ | |
4ed46869 KH |
3127 | } while (0) |
3128 | ||
df7492f9 | 3129 | |
4ed46869 KH |
3130 | /* The following four macros produce codes (control character or |
3131 | escape sequence) for ISO2022 locking-shift functions (shift-in, | |
3132 | shift-out, locking-shift-2, and locking-shift-3). */ | |
3133 | ||
df7492f9 KH |
3134 | #define ENCODE_SHIFT_IN \ |
3135 | do { \ | |
3136 | EMIT_ONE_ASCII_BYTE (ISO_CODE_SI); \ | |
3137 | CODING_ISO_INVOCATION (coding, 0) = 0; \ | |
4ed46869 KH |
3138 | } while (0) |
3139 | ||
df7492f9 KH |
3140 | |
3141 | #define ENCODE_SHIFT_OUT \ | |
3142 | do { \ | |
3143 | EMIT_ONE_ASCII_BYTE (ISO_CODE_SO); \ | |
3144 | CODING_ISO_INVOCATION (coding, 0) = 1; \ | |
4ed46869 KH |
3145 | } while (0) |
3146 | ||
df7492f9 KH |
3147 | |
3148 | #define ENCODE_LOCKING_SHIFT_2 \ | |
3149 | do { \ | |
3150 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'n'); \ | |
3151 | CODING_ISO_INVOCATION (coding, 0) = 2; \ | |
4ed46869 KH |
3152 | } while (0) |
3153 | ||
df7492f9 KH |
3154 | |
3155 | #define ENCODE_LOCKING_SHIFT_3 \ | |
3156 | do { \ | |
3157 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'n'); \ | |
3158 | CODING_ISO_INVOCATION (coding, 0) = 3; \ | |
4ed46869 KH |
3159 | } while (0) |
3160 | ||
df7492f9 | 3161 | |
f4dee582 RS |
3162 | /* Produce codes for a DIMENSION1 character whose character set is |
3163 | CHARSET and whose position-code is C1. Designation and invocation | |
4ed46869 KH |
3164 | sequences are also produced in advance if necessary. */ |
3165 | ||
6e85d753 KH |
3166 | #define ENCODE_ISO_CHARACTER_DIMENSION1(charset, c1) \ |
3167 | do { \ | |
df7492f9 KH |
3168 | int id = CHARSET_ID (charset); \ |
3169 | if (CODING_ISO_SINGLE_SHIFTING (coding)) \ | |
6e85d753 | 3170 | { \ |
df7492f9 KH |
3171 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ |
3172 | EMIT_ONE_ASCII_BYTE (c1 & 0x7F); \ | |
6e85d753 | 3173 | else \ |
df7492f9 KH |
3174 | EMIT_ONE_BYTE (c1 | 0x80); \ |
3175 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
6e85d753 KH |
3176 | break; \ |
3177 | } \ | |
df7492f9 | 3178 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 0)) \ |
6e85d753 | 3179 | { \ |
df7492f9 | 3180 | EMIT_ONE_ASCII_BYTE (c1 & 0x7F); \ |
6e85d753 KH |
3181 | break; \ |
3182 | } \ | |
df7492f9 | 3183 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 1)) \ |
6e85d753 | 3184 | { \ |
df7492f9 | 3185 | EMIT_ONE_BYTE (c1 | 0x80); \ |
6e85d753 KH |
3186 | break; \ |
3187 | } \ | |
6e85d753 KH |
3188 | else \ |
3189 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
3190 | must invoke it, or, at first, designate it to some graphic \ | |
3191 | register. Then repeat the loop to actually produce the \ | |
3192 | character. */ \ | |
df7492f9 KH |
3193 | dst = encode_invocation_designation (charset, coding, dst, \ |
3194 | &produced_chars); \ | |
4ed46869 KH |
3195 | } while (1) |
3196 | ||
df7492f9 | 3197 | |
f4dee582 RS |
3198 | /* Produce codes for a DIMENSION2 character whose character set is |
3199 | CHARSET and whose position-codes are C1 and C2. Designation and | |
4ed46869 KH |
3200 | invocation codes are also produced in advance if necessary. */ |
3201 | ||
6e85d753 KH |
3202 | #define ENCODE_ISO_CHARACTER_DIMENSION2(charset, c1, c2) \ |
3203 | do { \ | |
df7492f9 KH |
3204 | int id = CHARSET_ID (charset); \ |
3205 | if (CODING_ISO_SINGLE_SHIFTING (coding)) \ | |
6e85d753 | 3206 | { \ |
df7492f9 KH |
3207 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ |
3208 | EMIT_TWO_ASCII_BYTES ((c1) & 0x7F, (c2) & 0x7F); \ | |
6e85d753 | 3209 | else \ |
df7492f9 KH |
3210 | EMIT_TWO_BYTES ((c1) | 0x80, (c2) | 0x80); \ |
3211 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
6e85d753 KH |
3212 | break; \ |
3213 | } \ | |
df7492f9 | 3214 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 0)) \ |
6e85d753 | 3215 | { \ |
df7492f9 | 3216 | EMIT_TWO_ASCII_BYTES ((c1) & 0x7F, (c2) & 0x7F); \ |
6e85d753 KH |
3217 | break; \ |
3218 | } \ | |
df7492f9 | 3219 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 1)) \ |
6e85d753 | 3220 | { \ |
df7492f9 | 3221 | EMIT_TWO_BYTES ((c1) | 0x80, (c2) | 0x80); \ |
6e85d753 KH |
3222 | break; \ |
3223 | } \ | |
6e85d753 KH |
3224 | else \ |
3225 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
3226 | must invoke it, or, at first, designate it to some graphic \ | |
3227 | register. Then repeat the loop to actually produce the \ | |
3228 | character. */ \ | |
df7492f9 KH |
3229 | dst = encode_invocation_designation (charset, coding, dst, \ |
3230 | &produced_chars); \ | |
4ed46869 KH |
3231 | } while (1) |
3232 | ||
05e6f5dc | 3233 | |
df7492f9 KH |
3234 | #define ENCODE_ISO_CHARACTER(charset, c) \ |
3235 | do { \ | |
3236 | int code = ENCODE_CHAR ((charset),(c)); \ | |
3237 | \ | |
3238 | if (CHARSET_DIMENSION (charset) == 1) \ | |
3239 | ENCODE_ISO_CHARACTER_DIMENSION1 ((charset), code); \ | |
3240 | else \ | |
3241 | ENCODE_ISO_CHARACTER_DIMENSION2 ((charset), code >> 8, code & 0xFF); \ | |
84fbb8a0 | 3242 | } while (0) |
bdd9fb48 | 3243 | |
05e6f5dc | 3244 | |
4ed46869 | 3245 | /* Produce designation and invocation codes at a place pointed by DST |
df7492f9 | 3246 | to use CHARSET. The element `spec.iso_2022' of *CODING is updated. |
4ed46869 KH |
3247 | Return new DST. */ |
3248 | ||
3249 | unsigned char * | |
df7492f9 KH |
3250 | encode_invocation_designation (charset, coding, dst, p_nchars) |
3251 | struct charset *charset; | |
4ed46869 KH |
3252 | struct coding_system *coding; |
3253 | unsigned char *dst; | |
df7492f9 | 3254 | int *p_nchars; |
4ed46869 | 3255 | { |
df7492f9 KH |
3256 | int multibytep = coding->dst_multibyte; |
3257 | int produced_chars = *p_nchars; | |
4ed46869 | 3258 | int reg; /* graphic register number */ |
df7492f9 | 3259 | int id = CHARSET_ID (charset); |
4ed46869 KH |
3260 | |
3261 | /* At first, check designations. */ | |
3262 | for (reg = 0; reg < 4; reg++) | |
df7492f9 | 3263 | if (id == CODING_ISO_DESIGNATION (coding, reg)) |
4ed46869 KH |
3264 | break; |
3265 | ||
3266 | if (reg >= 4) | |
3267 | { | |
3268 | /* CHARSET is not yet designated to any graphic registers. */ | |
3269 | /* At first check the requested designation. */ | |
df7492f9 KH |
3270 | reg = CODING_ISO_REQUEST (coding, id); |
3271 | if (reg < 0) | |
1ba9e4ab KH |
3272 | /* Since CHARSET requests no special designation, designate it |
3273 | to graphic register 0. */ | |
4ed46869 KH |
3274 | reg = 0; |
3275 | ||
3276 | ENCODE_DESIGNATION (charset, reg, coding); | |
3277 | } | |
3278 | ||
df7492f9 KH |
3279 | if (CODING_ISO_INVOCATION (coding, 0) != reg |
3280 | && CODING_ISO_INVOCATION (coding, 1) != reg) | |
4ed46869 KH |
3281 | { |
3282 | /* Since the graphic register REG is not invoked to any graphic | |
3283 | planes, invoke it to graphic plane 0. */ | |
3284 | switch (reg) | |
3285 | { | |
3286 | case 0: /* graphic register 0 */ | |
3287 | ENCODE_SHIFT_IN; | |
3288 | break; | |
3289 | ||
3290 | case 1: /* graphic register 1 */ | |
3291 | ENCODE_SHIFT_OUT; | |
3292 | break; | |
3293 | ||
3294 | case 2: /* graphic register 2 */ | |
df7492f9 | 3295 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
4ed46869 KH |
3296 | ENCODE_SINGLE_SHIFT_2; |
3297 | else | |
3298 | ENCODE_LOCKING_SHIFT_2; | |
3299 | break; | |
3300 | ||
3301 | case 3: /* graphic register 3 */ | |
df7492f9 | 3302 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
4ed46869 KH |
3303 | ENCODE_SINGLE_SHIFT_3; |
3304 | else | |
3305 | ENCODE_LOCKING_SHIFT_3; | |
3306 | break; | |
3307 | } | |
3308 | } | |
b73bfc1c | 3309 | |
df7492f9 | 3310 | *p_nchars = produced_chars; |
4ed46869 KH |
3311 | return dst; |
3312 | } | |
3313 | ||
df7492f9 KH |
3314 | /* The following three macros produce codes for indicating direction |
3315 | of text. */ | |
3316 | #define ENCODE_CONTROL_SEQUENCE_INTRODUCER \ | |
ec6d2bb8 | 3317 | do { \ |
df7492f9 KH |
3318 | if (CODING_ISO_FLAGS (coding) == CODING_ISO_FLAG_SEVEN_BITS) \ |
3319 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, '['); \ | |
ec6d2bb8 | 3320 | else \ |
df7492f9 | 3321 | EMIT_ONE_BYTE (ISO_CODE_CSI); \ |
ec6d2bb8 KH |
3322 | } while (0) |
3323 | ||
ec6d2bb8 | 3324 | |
df7492f9 KH |
3325 | #define ENCODE_DIRECTION_R2L() \ |
3326 | do { \ | |
3327 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst); \ | |
3328 | EMIT_TWO_ASCII_BYTES ('2', ']'); \ | |
ec6d2bb8 KH |
3329 | } while (0) |
3330 | ||
ec6d2bb8 | 3331 | |
df7492f9 | 3332 | #define ENCODE_DIRECTION_L2R() \ |
ec6d2bb8 | 3333 | do { \ |
df7492f9 KH |
3334 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst); \ |
3335 | EMIT_TWO_ASCII_BYTES ('0', ']'); \ | |
4ed46869 KH |
3336 | } while (0) |
3337 | ||
4ed46869 KH |
3338 | |
3339 | /* Produce codes for designation and invocation to reset the graphic | |
3340 | planes and registers to initial state. */ | |
df7492f9 KH |
3341 | #define ENCODE_RESET_PLANE_AND_REGISTER() \ |
3342 | do { \ | |
3343 | int reg; \ | |
3344 | struct charset *charset; \ | |
3345 | \ | |
3346 | if (CODING_ISO_INVOCATION (coding, 0) != 0) \ | |
3347 | ENCODE_SHIFT_IN; \ | |
3348 | for (reg = 0; reg < 4; reg++) \ | |
3349 | if (CODING_ISO_INITIAL (coding, reg) >= 0 \ | |
3350 | && (CODING_ISO_DESIGNATION (coding, reg) \ | |
3351 | != CODING_ISO_INITIAL (coding, reg))) \ | |
3352 | { \ | |
3353 | charset = CHARSET_FROM_ID (CODING_ISO_INITIAL (coding, reg)); \ | |
3354 | ENCODE_DESIGNATION (charset, reg, coding); \ | |
3355 | } \ | |
4ed46869 KH |
3356 | } while (0) |
3357 | ||
df7492f9 | 3358 | |
bdd9fb48 | 3359 | /* Produce designation sequences of charsets in the line started from |
b73bfc1c | 3360 | SRC to a place pointed by DST, and return updated DST. |
bdd9fb48 KH |
3361 | |
3362 | If the current block ends before any end-of-line, we may fail to | |
d46c5b12 KH |
3363 | find all the necessary designations. */ |
3364 | ||
b73bfc1c | 3365 | static unsigned char * |
df7492f9 | 3366 | encode_designation_at_bol (coding, charbuf, charbuf_end, dst) |
e0e989f6 | 3367 | struct coding_system *coding; |
df7492f9 KH |
3368 | int *charbuf, *charbuf_end; |
3369 | unsigned char *dst; | |
e0e989f6 | 3370 | { |
df7492f9 | 3371 | struct charset *charset; |
bdd9fb48 KH |
3372 | /* Table of charsets to be designated to each graphic register. */ |
3373 | int r[4]; | |
df7492f9 KH |
3374 | int c, found = 0, reg; |
3375 | int produced_chars = 0; | |
3376 | int multibytep = coding->dst_multibyte; | |
3377 | Lisp_Object attrs; | |
3378 | Lisp_Object charset_list; | |
3379 | ||
3380 | attrs = CODING_ID_ATTRS (coding->id); | |
3381 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
3382 | if (EQ (charset_list, Qiso_2022)) | |
3383 | charset_list = Viso_2022_charset_list; | |
bdd9fb48 KH |
3384 | |
3385 | for (reg = 0; reg < 4; reg++) | |
3386 | r[reg] = -1; | |
3387 | ||
b73bfc1c | 3388 | while (found < 4) |
e0e989f6 | 3389 | { |
df7492f9 KH |
3390 | int id; |
3391 | ||
3392 | c = *charbuf++; | |
b73bfc1c KH |
3393 | if (c == '\n') |
3394 | break; | |
df7492f9 KH |
3395 | charset = char_charset (c, charset_list, NULL); |
3396 | id = CHARSET_ID (charset); | |
3397 | reg = CODING_ISO_REQUEST (coding, id); | |
3398 | if (reg >= 0 && r[reg] < 0) | |
bdd9fb48 KH |
3399 | { |
3400 | found++; | |
df7492f9 | 3401 | r[reg] = id; |
bdd9fb48 | 3402 | } |
bdd9fb48 KH |
3403 | } |
3404 | ||
3405 | if (found) | |
3406 | { | |
3407 | for (reg = 0; reg < 4; reg++) | |
3408 | if (r[reg] >= 0 | |
df7492f9 KH |
3409 | && CODING_ISO_DESIGNATION (coding, reg) != r[reg]) |
3410 | ENCODE_DESIGNATION (CHARSET_FROM_ID (r[reg]), reg, coding); | |
e0e989f6 | 3411 | } |
b73bfc1c KH |
3412 | |
3413 | return dst; | |
e0e989f6 KH |
3414 | } |
3415 | ||
4ed46869 KH |
3416 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */ |
3417 | ||
df7492f9 KH |
3418 | static int |
3419 | encode_coding_iso_2022 (coding) | |
4ed46869 | 3420 | struct coding_system *coding; |
4ed46869 | 3421 | { |
df7492f9 KH |
3422 | int multibytep = coding->dst_multibyte; |
3423 | int *charbuf = coding->charbuf; | |
3424 | int *charbuf_end = charbuf + coding->charbuf_used; | |
3425 | unsigned char *dst = coding->destination + coding->produced; | |
3426 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
3427 | int safe_room = 16; | |
3428 | int bol_designation | |
3429 | = (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATE_AT_BOL | |
3430 | && CODING_ISO_BOL (coding)); | |
3431 | int produced_chars = 0; | |
3432 | Lisp_Object attrs, eol_type, charset_list; | |
3433 | int ascii_compatible; | |
b73bfc1c | 3434 | int c; |
05e6f5dc | 3435 | |
df7492f9 | 3436 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
bdd9fb48 | 3437 | |
df7492f9 | 3438 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); |
4ed46869 | 3439 | |
df7492f9 | 3440 | while (charbuf < charbuf_end) |
4ed46869 | 3441 | { |
df7492f9 | 3442 | ASSURE_DESTINATION (safe_room); |
b73bfc1c | 3443 | |
df7492f9 | 3444 | if (bol_designation) |
b73bfc1c | 3445 | { |
df7492f9 | 3446 | unsigned char *dst_prev = dst; |
4ed46869 | 3447 | |
bdd9fb48 | 3448 | /* We have to produce designation sequences if any now. */ |
df7492f9 KH |
3449 | dst = encode_designation_at_bol (coding, charbuf, charbuf_end, dst); |
3450 | bol_designation = 0; | |
3451 | /* We are sure that designation sequences are all ASCII bytes. */ | |
3452 | produced_chars += dst - dst_prev; | |
4ed46869 | 3453 | } |
ec6d2bb8 | 3454 | |
df7492f9 | 3455 | c = *charbuf++; |
4ed46869 | 3456 | |
b73bfc1c KH |
3457 | /* Now encode the character C. */ |
3458 | if (c < 0x20 || c == 0x7F) | |
3459 | { | |
df7492f9 KH |
3460 | if (c == '\n' |
3461 | || (c == '\r' && EQ (eol_type, Qmac))) | |
19a8d9e0 | 3462 | { |
df7492f9 KH |
3463 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_EOL) |
3464 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3465 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_INIT_AT_BOL) | |
b73bfc1c | 3466 | { |
df7492f9 KH |
3467 | int i; |
3468 | ||
3469 | for (i = 0; i < 4; i++) | |
3470 | CODING_ISO_DESIGNATION (coding, i) | |
3471 | = CODING_ISO_INITIAL (coding, i); | |
b73bfc1c | 3472 | } |
df7492f9 KH |
3473 | bol_designation |
3474 | = CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATE_AT_BOL; | |
19a8d9e0 | 3475 | } |
df7492f9 KH |
3476 | else if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_CNTL) |
3477 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3478 | EMIT_ONE_ASCII_BYTE (c); | |
4ed46869 | 3479 | } |
df7492f9 | 3480 | else if (ASCII_CHAR_P (c)) |
88993dfd | 3481 | { |
df7492f9 KH |
3482 | if (ascii_compatible) |
3483 | EMIT_ONE_ASCII_BYTE (c); | |
3484 | else | |
3485 | ENCODE_ISO_CHARACTER (CHARSET_FROM_ID (charset_ascii), c); | |
88993dfd | 3486 | } |
b73bfc1c | 3487 | else |
df7492f9 KH |
3488 | { |
3489 | struct charset *charset = char_charset (c, charset_list, NULL); | |
b73bfc1c | 3490 | |
df7492f9 KH |
3491 | if (!charset) |
3492 | { | |
3493 | c = coding->default_char; | |
3494 | charset = char_charset (c, charset_list, NULL); | |
3495 | } | |
3496 | ENCODE_ISO_CHARACTER (charset, c); | |
3497 | } | |
84fbb8a0 | 3498 | } |
b73bfc1c | 3499 | |
df7492f9 KH |
3500 | if (coding->mode & CODING_MODE_LAST_BLOCK |
3501 | && CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_EOL) | |
3502 | { | |
3503 | ASSURE_DESTINATION (safe_room); | |
3504 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3505 | } | |
3506 | coding->result = CODING_RESULT_SUCCESS; | |
3507 | CODING_ISO_BOL (coding) = bol_designation; | |
3508 | coding->produced_char += produced_chars; | |
3509 | coding->produced = dst - coding->destination; | |
3510 | return 0; | |
4ed46869 KH |
3511 | } |
3512 | ||
3513 | \f | |
df7492f9 | 3514 | /*** 8,9. SJIS and BIG5 handlers ***/ |
4ed46869 | 3515 | |
df7492f9 | 3516 | /* Although SJIS and BIG5 are not ISO's coding system, they are used |
4ed46869 KH |
3517 | quite widely. So, for the moment, Emacs supports them in the bare |
3518 | C code. But, in the future, they may be supported only by CCL. */ | |
3519 | ||
3520 | /* SJIS is a coding system encoding three character sets: ASCII, right | |
3521 | half of JISX0201-Kana, and JISX0208. An ASCII character is encoded | |
3522 | as is. A character of charset katakana-jisx0201 is encoded by | |
3523 | "position-code + 0x80". A character of charset japanese-jisx0208 | |
3524 | is encoded in 2-byte but two position-codes are divided and shifted | |
df7492f9 | 3525 | so that it fit in the range below. |
4ed46869 KH |
3526 | |
3527 | --- CODE RANGE of SJIS --- | |
3528 | (character set) (range) | |
3529 | ASCII 0x00 .. 0x7F | |
df7492f9 | 3530 | KATAKANA-JISX0201 0xA0 .. 0xDF |
c28a9453 | 3531 | JISX0208 (1st byte) 0x81 .. 0x9F and 0xE0 .. 0xEF |
d14d03ac | 3532 | (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC |
4ed46869 KH |
3533 | ------------------------------- |
3534 | ||
3535 | */ | |
3536 | ||
3537 | /* BIG5 is a coding system encoding two character sets: ASCII and | |
3538 | Big5. An ASCII character is encoded as is. Big5 is a two-byte | |
df7492f9 | 3539 | character set and is encoded in two-byte. |
4ed46869 KH |
3540 | |
3541 | --- CODE RANGE of BIG5 --- | |
3542 | (character set) (range) | |
3543 | ASCII 0x00 .. 0x7F | |
3544 | Big5 (1st byte) 0xA1 .. 0xFE | |
3545 | (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE | |
3546 | -------------------------- | |
3547 | ||
df7492f9 | 3548 | */ |
4ed46869 KH |
3549 | |
3550 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3551 | Check if a text is encoded in SJIS. If it is, return | |
df7492f9 | 3552 | CATEGORY_MASK_SJIS, else return 0. */ |
4ed46869 | 3553 | |
0a28aafb | 3554 | static int |
df7492f9 KH |
3555 | detect_coding_sjis (coding, mask) |
3556 | struct coding_system *coding; | |
3557 | int *mask; | |
4ed46869 | 3558 | { |
df7492f9 KH |
3559 | unsigned char *src = coding->source, *src_base = src; |
3560 | unsigned char *src_end = coding->source + coding->src_bytes; | |
3561 | int multibytep = coding->src_multibyte; | |
3562 | int consumed_chars = 0; | |
3563 | int found = 0; | |
b73bfc1c | 3564 | int c; |
df7492f9 KH |
3565 | |
3566 | /* A coding system of this category is always ASCII compatible. */ | |
3567 | src += coding->head_ascii; | |
4ed46869 | 3568 | |
b73bfc1c | 3569 | while (1) |
4ed46869 | 3570 | { |
df7492f9 | 3571 | ONE_MORE_BYTE (c); |
682169fe KH |
3572 | if (c < 0x80) |
3573 | continue; | |
df7492f9 | 3574 | if ((c >= 0x81 && c <= 0x9F) || (c >= 0xE0 && c <= 0xEF)) |
4ed46869 | 3575 | { |
df7492f9 | 3576 | ONE_MORE_BYTE (c); |
682169fe | 3577 | if (c < 0x40 || c == 0x7F || c > 0xFC) |
df7492f9 KH |
3578 | break; |
3579 | found = 1; | |
4ed46869 | 3580 | } |
df7492f9 KH |
3581 | else if (c >= 0xA0 && c < 0xE0) |
3582 | found = 1; | |
3583 | else | |
3584 | break; | |
4ed46869 | 3585 | } |
df7492f9 KH |
3586 | *mask &= ~CATEGORY_MASK_SJIS; |
3587 | return 0; | |
3588 | ||
3589 | no_more_source: | |
3590 | if (!found) | |
3591 | return 0; | |
3592 | *mask &= CATEGORY_MASK_SJIS; | |
3593 | return 1; | |
4ed46869 KH |
3594 | } |
3595 | ||
3596 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3597 | Check if a text is encoded in BIG5. If it is, return | |
df7492f9 | 3598 | CATEGORY_MASK_BIG5, else return 0. */ |
4ed46869 | 3599 | |
0a28aafb | 3600 | static int |
df7492f9 KH |
3601 | detect_coding_big5 (coding, mask) |
3602 | struct coding_system *coding; | |
3603 | int *mask; | |
4ed46869 | 3604 | { |
df7492f9 KH |
3605 | unsigned char *src = coding->source, *src_base = src; |
3606 | unsigned char *src_end = coding->source + coding->src_bytes; | |
3607 | int multibytep = coding->src_multibyte; | |
3608 | int consumed_chars = 0; | |
3609 | int found = 0; | |
b73bfc1c | 3610 | int c; |
fa42c37f | 3611 | |
df7492f9 KH |
3612 | /* A coding system of this category is always ASCII compatible. */ |
3613 | src += coding->head_ascii; | |
fa42c37f | 3614 | |
b73bfc1c | 3615 | while (1) |
fa42c37f | 3616 | { |
df7492f9 KH |
3617 | ONE_MORE_BYTE (c); |
3618 | if (c < 0x80) | |
fa42c37f | 3619 | continue; |
df7492f9 | 3620 | if (c >= 0xA1) |
fa42c37f | 3621 | { |
df7492f9 KH |
3622 | ONE_MORE_BYTE (c); |
3623 | if (c < 0x40 || (c >= 0x7F && c <= 0xA0)) | |
fa42c37f | 3624 | return 0; |
df7492f9 | 3625 | found = 1; |
fa42c37f | 3626 | } |
df7492f9 KH |
3627 | else |
3628 | break; | |
fa42c37f | 3629 | } |
df7492f9 | 3630 | *mask &= ~CATEGORY_MASK_BIG5; |
fa42c37f | 3631 | return 0; |
df7492f9 KH |
3632 | |
3633 | no_more_source: | |
3634 | if (!found) | |
3635 | return 0; | |
3636 | *mask &= CATEGORY_MASK_BIG5; | |
3637 | return 1; | |
fa42c37f KH |
3638 | } |
3639 | ||
4ed46869 KH |
3640 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". |
3641 | If SJIS_P is 1, decode SJIS text, else decode BIG5 test. */ | |
3642 | ||
b73bfc1c | 3643 | static void |
df7492f9 | 3644 | decode_coding_sjis (coding) |
4ed46869 | 3645 | struct coding_system *coding; |
4ed46869 | 3646 | { |
df7492f9 KH |
3647 | unsigned char *src = coding->source + coding->consumed; |
3648 | unsigned char *src_end = coding->source + coding->src_bytes; | |
b73bfc1c | 3649 | unsigned char *src_base; |
df7492f9 KH |
3650 | int *charbuf = coding->charbuf; |
3651 | int *charbuf_end = charbuf + coding->charbuf_size; | |
3652 | int consumed_chars = 0, consumed_chars_base; | |
3653 | int multibytep = coding->src_multibyte; | |
3654 | struct charset *charset_roman, *charset_kanji, *charset_kana; | |
3655 | Lisp_Object attrs, eol_type, charset_list, val; | |
a5d301df | 3656 | |
df7492f9 KH |
3657 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
3658 | ||
3659 | val = charset_list; | |
3660 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
3661 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
3662 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))); | |
4ed46869 | 3663 | |
b73bfc1c | 3664 | while (1) |
4ed46869 | 3665 | { |
df7492f9 | 3666 | int c, c1; |
b73bfc1c KH |
3667 | |
3668 | src_base = src; | |
df7492f9 KH |
3669 | consumed_chars_base = consumed_chars; |
3670 | ||
3671 | if (charbuf >= charbuf_end) | |
3672 | break; | |
3673 | ||
3674 | ONE_MORE_BYTE (c); | |
b73bfc1c | 3675 | |
df7492f9 | 3676 | if (c == '\r') |
4ed46869 | 3677 | { |
df7492f9 | 3678 | if (EQ (eol_type, Qdos)) |
4ed46869 | 3679 | { |
df7492f9 KH |
3680 | if (src == src_end) |
3681 | goto no_more_source; | |
3682 | if (*src == '\n') | |
3683 | ONE_MORE_BYTE (c); | |
4ed46869 | 3684 | } |
df7492f9 KH |
3685 | else if (EQ (eol_type, Qmac)) |
3686 | c = '\n'; | |
4ed46869 | 3687 | } |
54f78171 | 3688 | else |
df7492f9 KH |
3689 | { |
3690 | struct charset *charset; | |
3691 | ||
3692 | if (c < 0x80) | |
3693 | charset = charset_roman; | |
3694 | else | |
4ed46869 | 3695 | { |
df7492f9 KH |
3696 | if (c >= 0xF0) |
3697 | goto invalid_code; | |
3698 | if (c < 0xA0 || c >= 0xE0) | |
fb88bf2d | 3699 | { |
54f78171 | 3700 | /* SJIS -> JISX0208 */ |
df7492f9 KH |
3701 | ONE_MORE_BYTE (c1); |
3702 | if (c1 < 0x40 || c1 == 0x7F || c1 > 0xFC) | |
3703 | goto invalid_code; | |
3704 | c = (c << 8) | c1; | |
3705 | SJIS_TO_JIS (c); | |
3706 | charset = charset_kanji; | |
5e34de15 | 3707 | } |
fb88bf2d | 3708 | else |
b73bfc1c | 3709 | /* SJIS -> JISX0201-Kana */ |
df7492f9 KH |
3710 | charset = charset_kana; |
3711 | } | |
3712 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c, c); | |
3713 | } | |
3714 | *charbuf++ = c; | |
3715 | continue; | |
3716 | ||
3717 | invalid_code: | |
3718 | src = src_base; | |
3719 | consumed_chars = consumed_chars_base; | |
3720 | ONE_MORE_BYTE (c); | |
3721 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
3722 | coding->errors++; | |
3723 | } | |
3724 | ||
3725 | no_more_source: | |
3726 | coding->consumed_char += consumed_chars_base; | |
3727 | coding->consumed = src_base - coding->source; | |
3728 | coding->charbuf_used = charbuf - coding->charbuf; | |
3729 | } | |
3730 | ||
3731 | static void | |
3732 | decode_coding_big5 (coding) | |
3733 | struct coding_system *coding; | |
3734 | { | |
3735 | unsigned char *src = coding->source + coding->consumed; | |
3736 | unsigned char *src_end = coding->source + coding->src_bytes; | |
3737 | unsigned char *src_base; | |
3738 | int *charbuf = coding->charbuf; | |
3739 | int *charbuf_end = charbuf + coding->charbuf_size; | |
3740 | int consumed_chars = 0, consumed_chars_base; | |
3741 | int multibytep = coding->src_multibyte; | |
3742 | struct charset *charset_roman, *charset_big5; | |
3743 | Lisp_Object attrs, eol_type, charset_list, val; | |
3744 | ||
3745 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
3746 | val = charset_list; | |
3747 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
3748 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
3749 | ||
3750 | while (1) | |
3751 | { | |
3752 | int c, c1; | |
3753 | ||
3754 | src_base = src; | |
3755 | consumed_chars_base = consumed_chars; | |
3756 | ||
3757 | if (charbuf >= charbuf_end) | |
3758 | break; | |
3759 | ||
3760 | ONE_MORE_BYTE (c); | |
3761 | ||
3762 | if (c == '\r') | |
3763 | { | |
3764 | if (EQ (eol_type, Qdos)) | |
3765 | { | |
3766 | if (src == src_end) | |
3767 | goto no_more_source; | |
3768 | if (*src == '\n') | |
3769 | ONE_MORE_BYTE (c); | |
4ed46869 | 3770 | } |
df7492f9 KH |
3771 | else if (EQ (eol_type, Qmac)) |
3772 | c = '\n'; | |
3773 | } | |
3774 | else | |
3775 | { | |
3776 | struct charset *charset; | |
3777 | if (c < 0x80) | |
3778 | charset = charset_roman; | |
fb88bf2d | 3779 | else |
fb88bf2d | 3780 | { |
54f78171 | 3781 | /* BIG5 -> Big5 */ |
df7492f9 KH |
3782 | if (c < 0xA1 || c > 0xFE) |
3783 | goto invalid_code; | |
3784 | ONE_MORE_BYTE (c1); | |
3785 | if (c1 < 0x40 || (c1 > 0x7E && c1 < 0xA1) || c1 > 0xFE) | |
3786 | goto invalid_code; | |
3787 | c = c << 8 | c1; | |
3788 | charset = charset_big5; | |
4ed46869 | 3789 | } |
df7492f9 | 3790 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c, c); |
4ed46869 | 3791 | } |
4ed46869 | 3792 | |
df7492f9 | 3793 | *charbuf++ = c; |
fb88bf2d KH |
3794 | continue; |
3795 | ||
df7492f9 | 3796 | invalid_code: |
4ed46869 | 3797 | src = src_base; |
df7492f9 KH |
3798 | consumed_chars = consumed_chars_base; |
3799 | ONE_MORE_BYTE (c); | |
3800 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
3801 | coding->errors++; | |
fb88bf2d | 3802 | } |
d46c5b12 | 3803 | |
df7492f9 KH |
3804 | no_more_source: |
3805 | coding->consumed_char += consumed_chars_base; | |
3806 | coding->consumed = src_base - coding->source; | |
3807 | coding->charbuf_used = charbuf - coding->charbuf; | |
3808 | } | |
3809 | ||
3810 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". | |
3811 | This function can encode charsets `ascii', `katakana-jisx0201', | |
3812 | `japanese-jisx0208', `chinese-big5-1', and `chinese-big5-2'. We | |
3813 | are sure that all these charsets are registered as official charset | |
3814 | (i.e. do not have extended leading-codes). Characters of other | |
3815 | charsets are produced without any encoding. If SJIS_P is 1, encode | |
3816 | SJIS text, else encode BIG5 text. */ | |
3817 | ||
3818 | static int | |
3819 | encode_coding_sjis (coding) | |
3820 | struct coding_system *coding; | |
3821 | { | |
3822 | int multibytep = coding->dst_multibyte; | |
3823 | int *charbuf = coding->charbuf; | |
3824 | int *charbuf_end = charbuf + coding->charbuf_used; | |
3825 | unsigned char *dst = coding->destination + coding->produced; | |
3826 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
3827 | int safe_room = 4; | |
3828 | int produced_chars = 0; | |
3829 | Lisp_Object attrs, eol_type, charset_list, val; | |
3830 | int ascii_compatible; | |
3831 | struct charset *charset_roman, *charset_kanji, *charset_kana; | |
3832 | int c; | |
3833 | ||
3834 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
3835 | val = charset_list; | |
3836 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
3837 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
3838 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))); | |
3839 | ||
3840 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); | |
3841 | ||
3842 | while (charbuf < charbuf_end) | |
3843 | { | |
3844 | ASSURE_DESTINATION (safe_room); | |
3845 | c = *charbuf++; | |
3846 | /* Now encode the character C. */ | |
3847 | if (ASCII_CHAR_P (c) && ascii_compatible) | |
3848 | EMIT_ONE_ASCII_BYTE (c); | |
3849 | else | |
3850 | { | |
3851 | unsigned code; | |
3852 | struct charset *charset = char_charset (c, charset_list, &code); | |
3853 | ||
3854 | if (!charset) | |
3855 | { | |
3856 | c = coding->default_char; | |
3857 | charset = char_charset (c, charset_list, &code); | |
3858 | } | |
3859 | if (code == CHARSET_INVALID_CODE (charset)) | |
3860 | abort (); | |
3861 | if (charset == charset_kanji) | |
3862 | { | |
3863 | int c1, c2; | |
3864 | JIS_TO_SJIS (code); | |
3865 | c1 = code >> 8, c2 = code & 0xFF; | |
3866 | EMIT_TWO_BYTES (c1, c2); | |
3867 | } | |
3868 | else if (charset == charset_kana) | |
3869 | EMIT_ONE_BYTE (code | 0x80); | |
3870 | else | |
3871 | EMIT_ONE_ASCII_BYTE (code & 0x7F); | |
3872 | } | |
3873 | } | |
3874 | coding->result = CODING_RESULT_SUCCESS; | |
3875 | coding->produced_char += produced_chars; | |
3876 | coding->produced = dst - coding->destination; | |
3877 | return 0; | |
3878 | } | |
3879 | ||
3880 | static int | |
3881 | encode_coding_big5 (coding) | |
3882 | struct coding_system *coding; | |
3883 | { | |
3884 | int multibytep = coding->dst_multibyte; | |
3885 | int *charbuf = coding->charbuf; | |
3886 | int *charbuf_end = charbuf + coding->charbuf_used; | |
3887 | unsigned char *dst = coding->destination + coding->produced; | |
3888 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
3889 | int safe_room = 4; | |
3890 | int produced_chars = 0; | |
3891 | Lisp_Object attrs, eol_type, charset_list, val; | |
3892 | int ascii_compatible; | |
3893 | struct charset *charset_roman, *charset_big5; | |
3894 | int c; | |
3895 | ||
3896 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
3897 | val = charset_list; | |
3898 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
3899 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
3900 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); | |
3901 | ||
3902 | while (charbuf < charbuf_end) | |
3903 | { | |
3904 | ASSURE_DESTINATION (safe_room); | |
3905 | c = *charbuf++; | |
3906 | /* Now encode the character C. */ | |
3907 | if (ASCII_CHAR_P (c) && ascii_compatible) | |
3908 | EMIT_ONE_ASCII_BYTE (c); | |
3909 | else | |
3910 | { | |
3911 | unsigned code; | |
3912 | struct charset *charset = char_charset (c, charset_list, &code); | |
3913 | ||
3914 | if (! charset) | |
3915 | { | |
3916 | c = coding->default_char; | |
3917 | charset = char_charset (c, charset_list, &code); | |
3918 | } | |
3919 | if (code == CHARSET_INVALID_CODE (charset)) | |
3920 | abort (); | |
3921 | if (charset == charset_big5) | |
3922 | { | |
3923 | int c1, c2; | |
3924 | ||
3925 | c1 = code >> 8, c2 = code & 0xFF; | |
3926 | EMIT_TWO_BYTES (c1, c2); | |
3927 | } | |
3928 | else | |
3929 | EMIT_ONE_ASCII_BYTE (code & 0x7F); | |
3930 | } | |
3931 | } | |
3932 | coding->result = CODING_RESULT_SUCCESS; | |
3933 | coding->produced_char += produced_chars; | |
3934 | coding->produced = dst - coding->destination; | |
3935 | return 0; | |
3936 | } | |
3937 | ||
3938 | \f | |
3939 | /*** 10. CCL handlers ***/ | |
3940 | ||
3941 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3942 | Check if a text is encoded in a coding system of which | |
3943 | encoder/decoder are written in CCL program. If it is, return | |
3944 | CATEGORY_MASK_CCL, else return 0. */ | |
3945 | ||
3946 | static int | |
3947 | detect_coding_ccl (coding, mask) | |
3948 | struct coding_system *coding; | |
3949 | int *mask; | |
3950 | { | |
3951 | unsigned char *src = coding->source, *src_base = src; | |
3952 | unsigned char *src_end = coding->source + coding->src_bytes; | |
3953 | int multibytep = coding->src_multibyte; | |
3954 | int consumed_chars = 0; | |
3955 | int found = 0; | |
3956 | unsigned char *valids = CODING_CCL_VALIDS (coding); | |
3957 | int head_ascii = coding->head_ascii; | |
3958 | Lisp_Object attrs; | |
3959 | ||
3960 | coding = &coding_categories[coding_category_ccl]; | |
3961 | attrs = CODING_ID_ATTRS (coding->id); | |
3962 | if (! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
3963 | src += head_ascii; | |
3964 | ||
3965 | while (1) | |
3966 | { | |
3967 | int c; | |
3968 | ONE_MORE_BYTE (c); | |
3969 | if (! valids[c]) | |
3970 | break; | |
3971 | if (!found && valids[c] > 1) | |
3972 | found = 1; | |
3973 | } | |
3974 | *mask &= ~CATEGORY_MASK_CCL; | |
3975 | return 0; | |
3976 | ||
3977 | no_more_source: | |
3978 | if (!found) | |
3979 | return 0; | |
3980 | *mask &= CATEGORY_MASK_CCL; | |
3981 | return 1; | |
3982 | } | |
3983 | ||
3984 | static void | |
3985 | decode_coding_ccl (coding) | |
3986 | struct coding_system *coding; | |
3987 | { | |
3988 | unsigned char *src = coding->source + coding->consumed; | |
3989 | unsigned char *src_end = coding->source + coding->src_bytes; | |
3990 | int *charbuf = coding->charbuf; | |
3991 | int *charbuf_end = charbuf + coding->charbuf_size; | |
3992 | int consumed_chars = 0; | |
3993 | int multibytep = coding->src_multibyte; | |
3994 | struct ccl_program ccl; | |
3995 | int source_charbuf[1024]; | |
3996 | int source_byteidx[1024]; | |
3997 | ||
3998 | setup_ccl_program (&ccl, CODING_CCL_DECODER (coding)); | |
3999 | ||
4000 | while (src < src_end) | |
4001 | { | |
4002 | unsigned char *p = src; | |
4003 | int *source, *source_end; | |
4004 | int i = 0; | |
4005 | ||
4006 | if (multibytep) | |
4007 | while (i < 1024 && p < src_end) | |
4008 | { | |
4009 | source_byteidx[i] = p - src; | |
4010 | source_charbuf[i++] = STRING_CHAR_ADVANCE (p); | |
4011 | } | |
4012 | else | |
4013 | while (i < 1024 && p < src_end) | |
4014 | source_charbuf[i++] = *p++; | |
4015 | ||
4016 | if (p == src_end && coding->mode & CODING_MODE_LAST_BLOCK) | |
4017 | ccl.last_block = 1; | |
4018 | ||
4019 | source = source_charbuf; | |
4020 | source_end = source + i; | |
4021 | while (source < source_end) | |
4022 | { | |
4023 | ccl_driver (&ccl, source, charbuf, | |
4024 | source_end - source, charbuf_end - charbuf); | |
4025 | source += ccl.consumed; | |
4026 | charbuf += ccl.produced; | |
4027 | if (ccl.status != CCL_STAT_SUSPEND_BY_DST) | |
4028 | break; | |
4029 | } | |
4030 | if (source < source_end) | |
4031 | src += source_byteidx[source - source_charbuf]; | |
4032 | else | |
4033 | src = p; | |
4034 | consumed_chars += source - source_charbuf; | |
4035 | ||
4036 | if (ccl.status != CCL_STAT_SUSPEND_BY_SRC | |
4037 | && ccl.status != CODING_RESULT_INSUFFICIENT_SRC) | |
4038 | break; | |
4039 | } | |
4040 | ||
4041 | switch (ccl.status) | |
4042 | { | |
4043 | case CCL_STAT_SUSPEND_BY_SRC: | |
4044 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; | |
4045 | break; | |
4046 | case CCL_STAT_SUSPEND_BY_DST: | |
4047 | break; | |
4048 | case CCL_STAT_QUIT: | |
4049 | case CCL_STAT_INVALID_CMD: | |
4050 | coding->result = CODING_RESULT_INTERRUPT; | |
4051 | break; | |
4052 | default: | |
4053 | coding->result = CODING_RESULT_SUCCESS; | |
4054 | break; | |
4055 | } | |
4056 | coding->consumed_char += consumed_chars; | |
4057 | coding->consumed = src - coding->source; | |
4058 | coding->charbuf_used = charbuf - coding->charbuf; | |
4059 | } | |
4060 | ||
4061 | static int | |
4062 | encode_coding_ccl (coding) | |
4063 | struct coding_system *coding; | |
4064 | { | |
4065 | struct ccl_program ccl; | |
4066 | int multibytep = coding->dst_multibyte; | |
4067 | int *charbuf = coding->charbuf; | |
4068 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4069 | unsigned char *dst = coding->destination + coding->produced; | |
4070 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4071 | unsigned char *adjusted_dst_end = dst_end - 1; | |
4072 | int destination_charbuf[1024]; | |
4073 | int i, produced_chars = 0; | |
4074 | ||
4075 | setup_ccl_program (&ccl, CODING_CCL_ENCODER (coding)); | |
4076 | ||
4077 | ccl.last_block = coding->mode & CODING_MODE_LAST_BLOCK; | |
4078 | ccl.dst_multibyte = coding->dst_multibyte; | |
4079 | ||
4080 | while (charbuf < charbuf_end && dst < adjusted_dst_end) | |
4081 | { | |
4082 | int dst_bytes = dst_end - dst; | |
4083 | if (dst_bytes > 1024) | |
4084 | dst_bytes = 1024; | |
4085 | ||
4086 | ccl_driver (&ccl, charbuf, destination_charbuf, | |
4087 | charbuf_end - charbuf, dst_bytes); | |
4088 | charbuf += ccl.consumed; | |
4089 | if (multibytep) | |
4090 | for (i = 0; i < ccl.produced; i++) | |
4091 | EMIT_ONE_BYTE (destination_charbuf[i] & 0xFF); | |
4092 | else | |
4093 | { | |
4094 | for (i = 0; i < ccl.produced; i++) | |
4095 | *dst++ = destination_charbuf[i] & 0xFF; | |
4096 | produced_chars += ccl.produced; | |
4097 | } | |
4098 | } | |
4099 | ||
4100 | switch (ccl.status) | |
4101 | { | |
4102 | case CCL_STAT_SUSPEND_BY_SRC: | |
4103 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; | |
4104 | break; | |
4105 | case CCL_STAT_SUSPEND_BY_DST: | |
4106 | coding->result = CODING_RESULT_INSUFFICIENT_DST; | |
4107 | break; | |
4108 | case CCL_STAT_QUIT: | |
4109 | case CCL_STAT_INVALID_CMD: | |
4110 | coding->result = CODING_RESULT_INTERRUPT; | |
4111 | break; | |
4112 | default: | |
4113 | coding->result = CODING_RESULT_SUCCESS; | |
4114 | break; | |
4115 | } | |
4116 | ||
4117 | coding->produced_char += produced_chars; | |
4118 | coding->produced = dst - coding->destination; | |
4119 | return 0; | |
4ed46869 KH |
4120 | } |
4121 | ||
df7492f9 KH |
4122 | |
4123 | \f | |
4124 | /*** 10, 11. no-conversion handlers ***/ | |
4125 | ||
4126 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ | |
4ed46869 | 4127 | |
b73bfc1c | 4128 | static void |
df7492f9 | 4129 | decode_coding_raw_text (coding) |
4ed46869 | 4130 | struct coding_system *coding; |
4ed46869 | 4131 | { |
df7492f9 | 4132 | coding->chars_at_source = 1; |
2c78b7e1 KH |
4133 | coding->consumed_char = 0; |
4134 | coding->consumed = 0; | |
df7492f9 KH |
4135 | coding->result = CODING_RESULT_SUCCESS; |
4136 | } | |
4ed46869 | 4137 | |
df7492f9 KH |
4138 | static int |
4139 | encode_coding_raw_text (coding) | |
4140 | struct coding_system *coding; | |
4141 | { | |
4142 | int multibytep = coding->dst_multibyte; | |
4143 | int *charbuf = coding->charbuf; | |
4144 | int *charbuf_end = coding->charbuf + coding->charbuf_used; | |
4145 | unsigned char *dst = coding->destination + coding->produced; | |
4146 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4147 | int produced_chars = 0; | |
4148 | int c; | |
a5d301df | 4149 | |
df7492f9 | 4150 | if (multibytep) |
b73bfc1c | 4151 | { |
df7492f9 | 4152 | int safe_room = MAX_MULTIBYTE_LENGTH * 2; |
4ed46869 | 4153 | |
df7492f9 KH |
4154 | if (coding->src_multibyte) |
4155 | while (charbuf < charbuf_end) | |
4156 | { | |
4157 | ASSURE_DESTINATION (safe_room); | |
4158 | c = *charbuf++; | |
4159 | if (ASCII_CHAR_P (c)) | |
4160 | EMIT_ONE_ASCII_BYTE (c); | |
4161 | else if (CHAR_BYTE8_P (c)) | |
4162 | { | |
4163 | c = CHAR_TO_BYTE8 (c); | |
4164 | EMIT_ONE_BYTE (c); | |
4165 | } | |
4166 | else | |
4167 | { | |
4168 | unsigned char str[MAX_MULTIBYTE_LENGTH], *p0 = str, *p1 = str; | |
93dec019 | 4169 | |
df7492f9 KH |
4170 | CHAR_STRING_ADVANCE (c, p1); |
4171 | while (p0 < p1) | |
4172 | EMIT_ONE_BYTE (*p0); | |
4173 | } | |
4174 | } | |
b73bfc1c | 4175 | else |
df7492f9 KH |
4176 | while (charbuf < charbuf_end) |
4177 | { | |
4178 | ASSURE_DESTINATION (safe_room); | |
4179 | c = *charbuf++; | |
4180 | EMIT_ONE_BYTE (c); | |
4181 | } | |
4182 | } | |
4183 | else | |
4184 | { | |
4185 | if (coding->src_multibyte) | |
b73bfc1c | 4186 | { |
df7492f9 KH |
4187 | int safe_room = MAX_MULTIBYTE_LENGTH; |
4188 | ||
4189 | while (charbuf < charbuf_end) | |
b73bfc1c | 4190 | { |
df7492f9 KH |
4191 | ASSURE_DESTINATION (safe_room); |
4192 | c = *charbuf++; | |
4193 | if (ASCII_CHAR_P (c)) | |
4194 | *dst++ = c; | |
4195 | else if (CHAR_BYTE8_P (c)) | |
4196 | *dst++ = CHAR_TO_BYTE8 (c); | |
b73bfc1c | 4197 | else |
df7492f9 KH |
4198 | CHAR_STRING_ADVANCE (c, dst); |
4199 | produced_chars++; | |
b73bfc1c | 4200 | } |
4ed46869 | 4201 | } |
df7492f9 KH |
4202 | else |
4203 | { | |
4204 | ASSURE_DESTINATION (charbuf_end - charbuf); | |
4205 | while (charbuf < charbuf_end && dst < dst_end) | |
4206 | *dst++ = *charbuf++; | |
4207 | produced_chars = dst - (coding->destination + coding->dst_bytes); | |
4208 | } | |
4ed46869 | 4209 | } |
df7492f9 KH |
4210 | coding->result = CODING_RESULT_SUCCESS; |
4211 | coding->produced_char += produced_chars; | |
4212 | coding->produced = dst - coding->destination; | |
4213 | return 0; | |
4ed46869 KH |
4214 | } |
4215 | ||
0a28aafb | 4216 | static int |
df7492f9 KH |
4217 | detect_coding_charset (coding, mask) |
4218 | struct coding_system *coding; | |
4219 | int *mask; | |
1397dc18 | 4220 | { |
df7492f9 KH |
4221 | unsigned char *src = coding->source, *src_base = src; |
4222 | unsigned char *src_end = coding->source + coding->src_bytes; | |
4223 | int multibytep = coding->src_multibyte; | |
4224 | int consumed_chars = 0; | |
4225 | Lisp_Object attrs, valids; | |
1397dc18 | 4226 | |
df7492f9 KH |
4227 | coding = &coding_categories[coding_category_charset]; |
4228 | attrs = CODING_ID_ATTRS (coding->id); | |
4229 | valids = AREF (attrs, coding_attr_charset_valids); | |
4230 | ||
4231 | if (! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
4232 | src += coding->head_ascii; | |
1397dc18 | 4233 | |
b73bfc1c | 4234 | while (1) |
1397dc18 | 4235 | { |
df7492f9 | 4236 | int c; |
1397dc18 | 4237 | |
df7492f9 KH |
4238 | ONE_MORE_BYTE (c); |
4239 | if (NILP (AREF (valids, c))) | |
4240 | break; | |
4241 | } | |
4242 | *mask &= ~CATEGORY_MASK_CHARSET; | |
4243 | return 0; | |
4ed46869 | 4244 | |
df7492f9 KH |
4245 | no_more_source: |
4246 | *mask &= CATEGORY_MASK_CHARSET; | |
4247 | return 1; | |
4248 | } | |
4ed46869 | 4249 | |
b73bfc1c | 4250 | static void |
df7492f9 | 4251 | decode_coding_charset (coding) |
4ed46869 | 4252 | struct coding_system *coding; |
4ed46869 | 4253 | { |
df7492f9 KH |
4254 | unsigned char *src = coding->source + coding->consumed; |
4255 | unsigned char *src_end = coding->source + coding->src_bytes; | |
b73bfc1c | 4256 | unsigned char *src_base; |
df7492f9 KH |
4257 | int *charbuf = coding->charbuf; |
4258 | int *charbuf_end = charbuf + coding->charbuf_size; | |
4259 | int consumed_chars = 0, consumed_chars_base; | |
4260 | int multibytep = coding->src_multibyte; | |
4eb6d3f1 | 4261 | Lisp_Object attrs, eol_type, charset_list, valids; |
df7492f9 KH |
4262 | |
4263 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
4eb6d3f1 | 4264 | valids = AREF (attrs, coding_attr_charset_valids); |
b73bfc1c | 4265 | |
df7492f9 | 4266 | while (1) |
4ed46869 | 4267 | { |
4eb6d3f1 | 4268 | int c; |
df7492f9 KH |
4269 | |
4270 | src_base = src; | |
4271 | consumed_chars_base = consumed_chars; | |
b73bfc1c | 4272 | |
df7492f9 KH |
4273 | if (charbuf >= charbuf_end) |
4274 | break; | |
4275 | ||
4eb6d3f1 | 4276 | ONE_MORE_BYTE (c); |
df7492f9 | 4277 | if (c == '\r') |
d46c5b12 | 4278 | { |
df7492f9 | 4279 | if (EQ (eol_type, Qdos)) |
b73bfc1c | 4280 | { |
4eb6d3f1 KH |
4281 | if (src < src_end |
4282 | && *src == '\n') | |
df7492f9 | 4283 | ONE_MORE_BYTE (c); |
b73bfc1c | 4284 | } |
df7492f9 | 4285 | else if (EQ (eol_type, Qmac)) |
b73bfc1c | 4286 | c = '\n'; |
d46c5b12 | 4287 | } |
df7492f9 | 4288 | else |
d46c5b12 | 4289 | { |
4eb6d3f1 KH |
4290 | Lisp_Object val; |
4291 | struct charset *charset; | |
4292 | int c1; | |
4293 | ||
4294 | val = AREF (valids, c); | |
4295 | if (NILP (val)) | |
4296 | goto invalid_code; | |
4297 | charset = CHARSET_FROM_ID (XFASTINT (val)); | |
4298 | if (CHARSET_DIMENSION (charset) > 1) | |
4299 | { | |
4300 | ONE_MORE_BYTE (c1); | |
4301 | c = (c << 8) | c1; | |
4302 | if (CHARSET_DIMENSION (charset) > 2) | |
4303 | { | |
4304 | ONE_MORE_BYTE (c1); | |
4305 | c = (c << 8) | c1; | |
4306 | if (CHARSET_DIMENSION (charset) > 3) | |
4307 | { | |
4308 | ONE_MORE_BYTE (c1); | |
4309 | c = (c << 8) | c1; | |
4310 | } | |
4311 | } | |
4312 | } | |
4313 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c, c); | |
df7492f9 KH |
4314 | if (c < 0) |
4315 | goto invalid_code; | |
d46c5b12 | 4316 | } |
df7492f9 KH |
4317 | *charbuf++ = c; |
4318 | continue; | |
4319 | ||
4320 | invalid_code: | |
4321 | src = src_base; | |
4322 | consumed_chars = consumed_chars_base; | |
4323 | ONE_MORE_BYTE (c); | |
4324 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
4325 | coding->errors++; | |
4ed46869 KH |
4326 | } |
4327 | ||
df7492f9 KH |
4328 | no_more_source: |
4329 | coding->consumed_char += consumed_chars_base; | |
4330 | coding->consumed = src_base - coding->source; | |
4331 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
4332 | } |
4333 | ||
df7492f9 KH |
4334 | static int |
4335 | encode_coding_charset (coding) | |
4ed46869 | 4336 | struct coding_system *coding; |
4ed46869 | 4337 | { |
df7492f9 KH |
4338 | int multibytep = coding->dst_multibyte; |
4339 | int *charbuf = coding->charbuf; | |
4340 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4341 | unsigned char *dst = coding->destination + coding->produced; | |
4342 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4343 | int safe_room = MAX_MULTIBYTE_LENGTH; | |
4344 | int produced_chars = 0; | |
4345 | struct charset *charset; | |
4346 | Lisp_Object attrs, eol_type, charset_list; | |
4347 | int ascii_compatible; | |
b73bfc1c | 4348 | int c; |
b73bfc1c | 4349 | |
df7492f9 | 4350 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
df7492f9 | 4351 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); |
fb88bf2d | 4352 | |
df7492f9 | 4353 | while (charbuf < charbuf_end) |
4ed46869 | 4354 | { |
4eb6d3f1 | 4355 | struct charset *charset; |
df7492f9 KH |
4356 | unsigned code; |
4357 | ||
4358 | ASSURE_DESTINATION (safe_room); | |
4359 | c = *charbuf++; | |
4360 | if (ascii_compatible && ASCII_CHAR_P (c)) | |
4361 | EMIT_ONE_ASCII_BYTE (c); | |
d46c5b12 | 4362 | else |
4eb6d3f1 KH |
4363 | { |
4364 | charset = char_charset (c, charset_list, &code); | |
4365 | if (charset) | |
4366 | { | |
4367 | if (CHARSET_DIMENSION (charset) == 1) | |
4368 | EMIT_ONE_BYTE (code); | |
4369 | else if (CHARSET_DIMENSION (charset) == 2) | |
4370 | EMIT_TWO_BYTES (code >> 8, code & 0xFF); | |
4371 | else if (CHARSET_DIMENSION (charset) == 3) | |
4372 | EMIT_THREE_BYTES (code >> 16, (code >> 8) & 0xFF, code & 0xFF); | |
4373 | else | |
4374 | EMIT_FOUR_BYTES (code >> 24, (code >> 16) & 0xFF, | |
4375 | (code >> 8) & 0xFF, code & 0xFF); | |
4376 | } | |
4377 | else | |
4378 | EMIT_ONE_BYTE (coding->default_char); | |
4379 | } | |
4ed46869 KH |
4380 | } |
4381 | ||
df7492f9 KH |
4382 | coding->result = CODING_RESULT_SUCCESS; |
4383 | coding->produced_char += produced_chars; | |
4384 | coding->produced = dst - coding->destination; | |
4385 | return 0; | |
4ed46869 KH |
4386 | } |
4387 | ||
4388 | \f | |
1397dc18 | 4389 | /*** 7. C library functions ***/ |
4ed46869 | 4390 | |
df7492f9 | 4391 | /* In Emacs Lisp, coding system is represented by a Lisp symbol which |
4ed46869 | 4392 | has a property `coding-system'. The value of this property is a |
df7492f9 | 4393 | vector of length 5 (called as coding-vector). Among elements of |
4ed46869 KH |
4394 | this vector, the first (element[0]) and the fifth (element[4]) |
4395 | carry important information for decoding/encoding. Before | |
4396 | decoding/encoding, this information should be set in fields of a | |
4397 | structure of type `coding_system'. | |
4398 | ||
df7492f9 | 4399 | A value of property `coding-system' can be a symbol of another |
4ed46869 KH |
4400 | subsidiary coding-system. In that case, Emacs gets coding-vector |
4401 | from that symbol. | |
4402 | ||
4403 | `element[0]' contains information to be set in `coding->type'. The | |
4404 | value and its meaning is as follows: | |
4405 | ||
0ef69138 KH |
4406 | 0 -- coding_type_emacs_mule |
4407 | 1 -- coding_type_sjis | |
df7492f9 | 4408 | 2 -- coding_type_iso_2022 |
0ef69138 KH |
4409 | 3 -- coding_type_big5 |
4410 | 4 -- coding_type_ccl encoder/decoder written in CCL | |
4411 | nil -- coding_type_no_conversion | |
4412 | t -- coding_type_undecided (automatic conversion on decoding, | |
4413 | no-conversion on encoding) | |
4ed46869 KH |
4414 | |
4415 | `element[4]' contains information to be set in `coding->flags' and | |
4416 | `coding->spec'. The meaning varies by `coding->type'. | |
4417 | ||
df7492f9 | 4418 | If `coding->type' is `coding_type_iso_2022', element[4] is a vector |
4ed46869 KH |
4419 | of length 32 (of which the first 13 sub-elements are used now). |
4420 | Meanings of these sub-elements are: | |
4421 | ||
df7492f9 KH |
4422 | sub-element[N] where N is 0 through 3: to be set in `coding->spec.iso_2022' |
4423 | If the value is an integer of valid charset, the charset is | |
4424 | assumed to be designated to graphic register N initially. | |
4ed46869 | 4425 | |
df7492f9 KH |
4426 | If the value is minus, it is a minus value of charset which |
4427 | reserves graphic register N, which means that the charset is | |
4428 | not designated initially but should be designated to graphic | |
4429 | register N just before encoding a character in that charset. | |
1397dc18 | 4430 | |
df7492f9 KH |
4431 | If the value is nil, graphic register N is never used on |
4432 | encoding. | |
4433 | ||
4434 | sub-element[N] where N is 4 through 11: to be set in `coding->flags' | |
4435 | Each value takes t or nil. See the section ISO2022 of | |
4436 | `coding.h' for more information. | |
1397dc18 | 4437 | |
df7492f9 KH |
4438 | If `coding->type' is `coding_type_big5', element[4] is t to denote |
4439 | BIG5-ETen or nil to denote BIG5-HKU. | |
4ed46869 | 4440 | |
df7492f9 | 4441 | If `coding->type' takes the other value, element[4] is ignored. |
27901516 | 4442 | |
df7492f9 KH |
4443 | Emacs Lisp's coding system also carries information about format of |
4444 | end-of-line in a value of property `eol-type'. If the value is | |
4445 | integer, 0 means eol_lf, 1 means eol_crlf, and 2 means eol_cr. If | |
4446 | it is not integer, it should be a vector of subsidiary coding | |
4447 | systems of which property `eol-type' has one of above values. | |
4ed46869 | 4448 | |
df7492f9 | 4449 | */ |
4ed46869 | 4450 | |
df7492f9 KH |
4451 | /* Setup coding context CODING from information about CODING_SYSTEM. |
4452 | If CODING_SYSTEM is nil, `no-conversion' is assumed. If | |
4453 | CODING_SYSTEM is invalid, signal an error. */ | |
ec6d2bb8 KH |
4454 | |
4455 | void | |
df7492f9 KH |
4456 | setup_coding_system (coding_system, coding) |
4457 | Lisp_Object coding_system; | |
ec6d2bb8 KH |
4458 | struct coding_system *coding; |
4459 | { | |
df7492f9 KH |
4460 | Lisp_Object attrs; |
4461 | Lisp_Object eol_type; | |
4462 | Lisp_Object coding_type; | |
4463 | Lisp_Object val; | |
ec6d2bb8 | 4464 | |
df7492f9 KH |
4465 | if (NILP (coding_system)) |
4466 | coding_system = Qno_conversion; | |
4467 | ||
4468 | CHECK_CODING_SYSTEM_GET_ID (coding_system, coding->id); | |
4469 | ||
4470 | attrs = CODING_ID_ATTRS (coding->id); | |
4471 | eol_type = CODING_ID_EOL_TYPE (coding->id); | |
4472 | ||
4473 | coding->mode = 0; | |
4474 | coding->head_ascii = -1; | |
4475 | coding->common_flags | |
4476 | = (VECTORP (eol_type) ? CODING_REQUIRE_DETECTION_MASK : 0); | |
4477 | ||
4478 | val = CODING_ATTR_SAFE_CHARSETS (attrs); | |
4479 | coding->max_charset_id = XSTRING (val)->size - 1; | |
4480 | coding->safe_charsets = (char *) XSTRING (val)->data; | |
4481 | coding->default_char = XINT (CODING_ATTR_DEFAULT_CHAR (attrs)); | |
4482 | ||
4483 | coding_type = CODING_ATTR_TYPE (attrs); | |
4484 | if (EQ (coding_type, Qundecided)) | |
4485 | { | |
4486 | coding->detector = NULL; | |
4487 | coding->decoder = decode_coding_raw_text; | |
4488 | coding->encoder = encode_coding_raw_text; | |
4489 | coding->common_flags |= CODING_REQUIRE_DETECTION_MASK; | |
4490 | } | |
4491 | else if (EQ (coding_type, Qiso_2022)) | |
4492 | { | |
4493 | int i; | |
4494 | int flags = XINT (AREF (attrs, coding_attr_iso_flags)); | |
4495 | ||
4496 | /* Invoke graphic register 0 to plane 0. */ | |
4497 | CODING_ISO_INVOCATION (coding, 0) = 0; | |
4498 | /* Invoke graphic register 1 to plane 1 if we can use 8-bit. */ | |
4499 | CODING_ISO_INVOCATION (coding, 1) | |
4500 | = (flags & CODING_ISO_FLAG_SEVEN_BITS ? -1 : 1); | |
4501 | /* Setup the initial status of designation. */ | |
4502 | for (i = 0; i < 4; i++) | |
4503 | CODING_ISO_DESIGNATION (coding, i) = CODING_ISO_INITIAL (coding, i); | |
4504 | /* Not single shifting initially. */ | |
4505 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; | |
4506 | /* Beginning of buffer should also be regarded as bol. */ | |
4507 | CODING_ISO_BOL (coding) = 1; | |
4508 | coding->detector = detect_coding_iso_2022; | |
4509 | coding->decoder = decode_coding_iso_2022; | |
4510 | coding->encoder = encode_coding_iso_2022; | |
4511 | if (flags & CODING_ISO_FLAG_SAFE) | |
4512 | coding->mode |= CODING_MODE_SAFE_ENCODING; | |
4513 | coding->common_flags | |
4514 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK | |
4515 | | CODING_REQUIRE_FLUSHING_MASK); | |
4516 | if (flags & CODING_ISO_FLAG_COMPOSITION) | |
4517 | coding->common_flags |= CODING_ANNOTATE_COMPOSITION_MASK; | |
4518 | if (flags & CODING_ISO_FLAG_FULL_SUPPORT) | |
4519 | { | |
4520 | setup_iso_safe_charsets (attrs); | |
4521 | val = CODING_ATTR_SAFE_CHARSETS (attrs); | |
4522 | coding->max_charset_id = XSTRING (val)->size - 1; | |
4523 | coding->safe_charsets = (char *) XSTRING (val)->data; | |
4524 | } | |
4525 | CODING_ISO_FLAGS (coding) = flags; | |
4526 | } | |
4527 | else if (EQ (coding_type, Qcharset)) | |
4528 | { | |
4529 | coding->detector = detect_coding_charset; | |
4530 | coding->decoder = decode_coding_charset; | |
4531 | coding->encoder = encode_coding_charset; | |
4532 | coding->common_flags | |
4533 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
4534 | } | |
4535 | else if (EQ (coding_type, Qutf_8)) | |
4536 | { | |
4537 | coding->detector = detect_coding_utf_8; | |
4538 | coding->decoder = decode_coding_utf_8; | |
4539 | coding->encoder = encode_coding_utf_8; | |
4540 | coding->common_flags | |
4541 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
4542 | } | |
4543 | else if (EQ (coding_type, Qutf_16)) | |
4544 | { | |
4545 | val = AREF (attrs, coding_attr_utf_16_bom); | |
4546 | CODING_UTF_16_BOM (coding) = (CONSP (val) ? utf_16_detect_bom | |
4547 | : EQ (val, Qt) ? utf_16_with_bom | |
4548 | : utf_16_without_bom); | |
4549 | val = AREF (attrs, coding_attr_utf_16_endian); | |
4550 | CODING_UTF_16_ENDIAN (coding) = (NILP (val) ? utf_16_big_endian | |
4551 | : utf_16_little_endian); | |
e19c3639 | 4552 | CODING_UTF_16_SURROGATE (coding) = 0; |
df7492f9 KH |
4553 | coding->detector = detect_coding_utf_16; |
4554 | coding->decoder = decode_coding_utf_16; | |
4555 | coding->encoder = encode_coding_utf_16; | |
4556 | coding->common_flags | |
4557 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
4558 | } | |
4559 | else if (EQ (coding_type, Qccl)) | |
4560 | { | |
4561 | coding->detector = detect_coding_ccl; | |
4562 | coding->decoder = decode_coding_ccl; | |
4563 | coding->encoder = encode_coding_ccl; | |
4564 | coding->common_flags | |
4565 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK | |
4566 | | CODING_REQUIRE_FLUSHING_MASK); | |
4567 | } | |
4568 | else if (EQ (coding_type, Qemacs_mule)) | |
4569 | { | |
4570 | coding->detector = detect_coding_emacs_mule; | |
4571 | coding->decoder = decode_coding_emacs_mule; | |
4572 | coding->encoder = encode_coding_emacs_mule; | |
4573 | coding->common_flags | |
4574 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
4575 | if (! NILP (AREF (attrs, coding_attr_emacs_mule_full)) | |
4576 | && ! EQ (CODING_ATTR_CHARSET_LIST (attrs), Vemacs_mule_charset_list)) | |
4577 | { | |
4578 | Lisp_Object tail, safe_charsets; | |
4579 | int max_charset_id = 0; | |
4580 | ||
4581 | for (tail = Vemacs_mule_charset_list; CONSP (tail); | |
4582 | tail = XCDR (tail)) | |
4583 | if (max_charset_id < XFASTINT (XCAR (tail))) | |
4584 | max_charset_id = XFASTINT (XCAR (tail)); | |
4585 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), | |
4586 | make_number (255)); | |
4587 | for (tail = Vemacs_mule_charset_list; CONSP (tail); | |
4588 | tail = XCDR (tail)) | |
4589 | XSTRING (safe_charsets)->data[XFASTINT (XCAR (tail))] = 0; | |
4590 | coding->max_charset_id = max_charset_id; | |
4591 | coding->safe_charsets = (char *) XSTRING (safe_charsets)->data; | |
4592 | } | |
4593 | } | |
4594 | else if (EQ (coding_type, Qshift_jis)) | |
4595 | { | |
4596 | coding->detector = detect_coding_sjis; | |
4597 | coding->decoder = decode_coding_sjis; | |
4598 | coding->encoder = encode_coding_sjis; | |
4599 | coding->common_flags | |
4600 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
4601 | } | |
4602 | else if (EQ (coding_type, Qbig5)) | |
4603 | { | |
4604 | coding->detector = detect_coding_big5; | |
4605 | coding->decoder = decode_coding_big5; | |
4606 | coding->encoder = encode_coding_big5; | |
4607 | coding->common_flags | |
4608 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
4609 | } | |
4610 | else /* EQ (coding_type, Qraw_text) */ | |
ec6d2bb8 | 4611 | { |
df7492f9 KH |
4612 | coding->detector = NULL; |
4613 | coding->decoder = decode_coding_raw_text; | |
4614 | coding->encoder = encode_coding_raw_text; | |
4615 | coding->common_flags |= CODING_FOR_UNIBYTE_MASK; | |
ec6d2bb8 | 4616 | } |
df7492f9 KH |
4617 | |
4618 | return; | |
ec6d2bb8 KH |
4619 | } |
4620 | ||
df7492f9 KH |
4621 | /* Return raw-text or one of its subsidiaries that has the same |
4622 | eol_type as CODING-SYSTEM. */ | |
ec6d2bb8 | 4623 | |
df7492f9 KH |
4624 | Lisp_Object |
4625 | raw_text_coding_system (coding_system) | |
4626 | Lisp_Object coding_system; | |
ec6d2bb8 | 4627 | { |
0be8721c | 4628 | Lisp_Object spec, attrs; |
df7492f9 KH |
4629 | Lisp_Object eol_type, raw_text_eol_type; |
4630 | ||
4631 | spec = CODING_SYSTEM_SPEC (coding_system); | |
4632 | attrs = AREF (spec, 0); | |
4633 | ||
4634 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) | |
4635 | return coding_system; | |
ec6d2bb8 | 4636 | |
df7492f9 KH |
4637 | eol_type = AREF (spec, 2); |
4638 | if (VECTORP (eol_type)) | |
4639 | return Qraw_text; | |
4640 | spec = CODING_SYSTEM_SPEC (Qraw_text); | |
4641 | raw_text_eol_type = AREF (spec, 2); | |
4642 | return (EQ (eol_type, Qunix) ? AREF (raw_text_eol_type, 0) | |
4643 | : EQ (eol_type, Qdos) ? AREF (raw_text_eol_type, 1) | |
4644 | : AREF (raw_text_eol_type, 2)); | |
ec6d2bb8 KH |
4645 | } |
4646 | ||
54f78171 | 4647 | |
df7492f9 KH |
4648 | /* If CODING_SYSTEM doesn't specify end-of-line format but PARENT |
4649 | does, return one of the subsidiary that has the same eol-spec as | |
4650 | PARENT. Otherwise, return CODING_SYSTEM. */ | |
4651 | ||
4652 | Lisp_Object | |
4653 | coding_inherit_eol_type (coding_system, parent) | |
54f78171 | 4654 | { |
df7492f9 | 4655 | Lisp_Object spec, attrs, eol_type; |
54f78171 | 4656 | |
df7492f9 KH |
4657 | spec = CODING_SYSTEM_SPEC (coding_system); |
4658 | attrs = AREF (spec, 0); | |
4659 | eol_type = AREF (spec, 2); | |
4660 | if (VECTORP (eol_type)) | |
4661 | { | |
4662 | Lisp_Object parent_spec; | |
df7492f9 KH |
4663 | Lisp_Object parent_eol_type; |
4664 | ||
4665 | parent_spec | |
4666 | = CODING_SYSTEM_SPEC (buffer_defaults.buffer_file_coding_system); | |
4667 | parent_eol_type = AREF (parent_spec, 2); | |
4668 | if (EQ (parent_eol_type, Qunix)) | |
4669 | coding_system = AREF (eol_type, 0); | |
4670 | else if (EQ (parent_eol_type, Qdos)) | |
4671 | coding_system = AREF (eol_type, 1); | |
4672 | else if (EQ (parent_eol_type, Qmac)) | |
4673 | coding_system = AREF (eol_type, 2); | |
54f78171 | 4674 | } |
df7492f9 | 4675 | return coding_system; |
54f78171 KH |
4676 | } |
4677 | ||
4ed46869 KH |
4678 | /* Emacs has a mechanism to automatically detect a coding system if it |
4679 | is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But, | |
4680 | it's impossible to distinguish some coding systems accurately | |
4681 | because they use the same range of codes. So, at first, coding | |
4682 | systems are categorized into 7, those are: | |
4683 | ||
0ef69138 | 4684 | o coding-category-emacs-mule |
4ed46869 KH |
4685 | |
4686 | The category for a coding system which has the same code range | |
4687 | as Emacs' internal format. Assigned the coding-system (Lisp | |
0ef69138 | 4688 | symbol) `emacs-mule' by default. |
4ed46869 KH |
4689 | |
4690 | o coding-category-sjis | |
4691 | ||
4692 | The category for a coding system which has the same code range | |
4693 | as SJIS. Assigned the coding-system (Lisp | |
7717c392 | 4694 | symbol) `japanese-shift-jis' by default. |
4ed46869 KH |
4695 | |
4696 | o coding-category-iso-7 | |
4697 | ||
4698 | The category for a coding system which has the same code range | |
7717c392 | 4699 | as ISO2022 of 7-bit environment. This doesn't use any locking |
d46c5b12 KH |
4700 | shift and single shift functions. This can encode/decode all |
4701 | charsets. Assigned the coding-system (Lisp symbol) | |
4702 | `iso-2022-7bit' by default. | |
4703 | ||
4704 | o coding-category-iso-7-tight | |
4705 | ||
4706 | Same as coding-category-iso-7 except that this can | |
4707 | encode/decode only the specified charsets. | |
4ed46869 KH |
4708 | |
4709 | o coding-category-iso-8-1 | |
4710 | ||
4711 | The category for a coding system which has the same code range | |
4712 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
4713 | for DIMENSION1 charset. This doesn't use any locking shift |
4714 | and single shift functions. Assigned the coding-system (Lisp | |
4715 | symbol) `iso-latin-1' by default. | |
4ed46869 KH |
4716 | |
4717 | o coding-category-iso-8-2 | |
4718 | ||
4719 | The category for a coding system which has the same code range | |
4720 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
4721 | for DIMENSION2 charset. This doesn't use any locking shift |
4722 | and single shift functions. Assigned the coding-system (Lisp | |
4723 | symbol) `japanese-iso-8bit' by default. | |
4ed46869 | 4724 | |
7717c392 | 4725 | o coding-category-iso-7-else |
4ed46869 KH |
4726 | |
4727 | The category for a coding system which has the same code range | |
df7492f9 | 4728 | as ISO2022 of 7-bit environemnt but uses locking shift or |
7717c392 KH |
4729 | single shift functions. Assigned the coding-system (Lisp |
4730 | symbol) `iso-2022-7bit-lock' by default. | |
4731 | ||
4732 | o coding-category-iso-8-else | |
4733 | ||
4734 | The category for a coding system which has the same code range | |
df7492f9 | 4735 | as ISO2022 of 8-bit environemnt but uses locking shift or |
7717c392 KH |
4736 | single shift functions. Assigned the coding-system (Lisp |
4737 | symbol) `iso-2022-8bit-ss2' by default. | |
4ed46869 KH |
4738 | |
4739 | o coding-category-big5 | |
4740 | ||
4741 | The category for a coding system which has the same code range | |
4742 | as BIG5. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 4743 | `cn-big5' by default. |
4ed46869 | 4744 | |
fa42c37f KH |
4745 | o coding-category-utf-8 |
4746 | ||
4747 | The category for a coding system which has the same code range | |
4748 | as UTF-8 (cf. RFC2279). Assigned the coding-system (Lisp | |
4749 | symbol) `utf-8' by default. | |
4750 | ||
4751 | o coding-category-utf-16-be | |
4752 | ||
4753 | The category for a coding system in which a text has an | |
4754 | Unicode signature (cf. Unicode Standard) in the order of BIG | |
4755 | endian at the head. Assigned the coding-system (Lisp symbol) | |
4756 | `utf-16-be' by default. | |
4757 | ||
4758 | o coding-category-utf-16-le | |
4759 | ||
4760 | The category for a coding system in which a text has an | |
4761 | Unicode signature (cf. Unicode Standard) in the order of | |
4762 | LITTLE endian at the head. Assigned the coding-system (Lisp | |
4763 | symbol) `utf-16-le' by default. | |
4764 | ||
1397dc18 KH |
4765 | o coding-category-ccl |
4766 | ||
4767 | The category for a coding system of which encoder/decoder is | |
4768 | written in CCL programs. The default value is nil, i.e., no | |
4769 | coding system is assigned. | |
4770 | ||
4ed46869 KH |
4771 | o coding-category-binary |
4772 | ||
4773 | The category for a coding system not categorized in any of the | |
4774 | above. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 4775 | `no-conversion' by default. |
4ed46869 KH |
4776 | |
4777 | Each of them is a Lisp symbol and the value is an actual | |
df7492f9 | 4778 | `coding-system's (this is also a Lisp symbol) assigned by a user. |
4ed46869 KH |
4779 | What Emacs does actually is to detect a category of coding system. |
4780 | Then, it uses a `coding-system' assigned to it. If Emacs can't | |
df7492f9 | 4781 | decide only one possible category, it selects a category of the |
4ed46869 KH |
4782 | highest priority. Priorities of categories are also specified by a |
4783 | user in a Lisp variable `coding-category-list'. | |
4784 | ||
4785 | */ | |
4786 | ||
df7492f9 KH |
4787 | #define EOL_SEEN_NONE 0 |
4788 | #define EOL_SEEN_LF 1 | |
4789 | #define EOL_SEEN_CR 2 | |
4790 | #define EOL_SEEN_CRLF 4 | |
4ed46869 | 4791 | |
df7492f9 KH |
4792 | /* Detect how end-of-line of a text of length CODING->src_bytes |
4793 | pointed by CODING->source is encoded. Return one of | |
4794 | EOL_SEEN_XXX. */ | |
4ed46869 | 4795 | |
bc4bc72a RS |
4796 | #define MAX_EOL_CHECK_COUNT 3 |
4797 | ||
d46c5b12 | 4798 | static int |
df7492f9 KH |
4799 | detect_eol (coding, source, src_bytes) |
4800 | struct coding_system *coding; | |
d46c5b12 | 4801 | unsigned char *source; |
df7492f9 | 4802 | EMACS_INT src_bytes; |
4ed46869 | 4803 | { |
df7492f9 | 4804 | Lisp_Object attrs, coding_type; |
d46c5b12 | 4805 | unsigned char *src = source, *src_end = src + src_bytes; |
4ed46869 | 4806 | unsigned char c; |
df7492f9 KH |
4807 | int total = 0; |
4808 | int eol_seen = EOL_SEEN_NONE; | |
4ed46869 | 4809 | |
df7492f9 KH |
4810 | attrs = CODING_ID_ATTRS (coding->id); |
4811 | coding_type = CODING_ATTR_TYPE (attrs); | |
d46c5b12 | 4812 | |
df7492f9 | 4813 | if (EQ (coding_type, Qccl)) |
4ed46869 | 4814 | { |
df7492f9 | 4815 | int msb, lsb; |
fa42c37f | 4816 | |
df7492f9 KH |
4817 | msb = coding->spec.utf_16.endian == utf_16_little_endian; |
4818 | lsb = 1 - msb; | |
fa42c37f | 4819 | |
df7492f9 | 4820 | while (src + 1 < src_end) |
fa42c37f | 4821 | { |
df7492f9 KH |
4822 | c = src[lsb]; |
4823 | if (src[msb] == 0 && (c == '\n' || c == '\r')) | |
fa42c37f | 4824 | { |
df7492f9 KH |
4825 | int this_eol; |
4826 | ||
4827 | if (c == '\n') | |
4828 | this_eol = EOL_SEEN_LF; | |
4829 | else if (src + 3 >= src_end | |
4830 | || src[msb + 2] != 0 | |
4831 | || src[lsb + 2] != '\n') | |
4832 | this_eol = EOL_SEEN_CR; | |
fa42c37f | 4833 | else |
df7492f9 KH |
4834 | this_eol = EOL_SEEN_CRLF; |
4835 | ||
4836 | if (eol_seen == EOL_SEEN_NONE) | |
4837 | /* This is the first end-of-line. */ | |
4838 | eol_seen = this_eol; | |
4839 | else if (eol_seen != this_eol) | |
fa42c37f | 4840 | { |
df7492f9 KH |
4841 | /* The found type is different from what found before. */ |
4842 | eol_seen = EOL_SEEN_LF; | |
4843 | break; | |
fa42c37f | 4844 | } |
df7492f9 KH |
4845 | if (++total == MAX_EOL_CHECK_COUNT) |
4846 | break; | |
fa42c37f | 4847 | } |
df7492f9 | 4848 | src += 2; |
fa42c37f | 4849 | } |
df7492f9 | 4850 | } |
d46c5b12 | 4851 | else |
27901516 | 4852 | { |
df7492f9 | 4853 | while (src < src_end) |
27901516 | 4854 | { |
df7492f9 KH |
4855 | c = *src++; |
4856 | if (c == '\n' || c == '\r') | |
4857 | { | |
4858 | int this_eol; | |
d46c5b12 | 4859 | |
df7492f9 KH |
4860 | if (c == '\n') |
4861 | this_eol = EOL_SEEN_LF; | |
4862 | else if (src >= src_end || *src != '\n') | |
4863 | this_eol = EOL_SEEN_CR; | |
4864 | else | |
4865 | this_eol = EOL_SEEN_CRLF, src++; | |
d46c5b12 | 4866 | |
df7492f9 KH |
4867 | if (eol_seen == EOL_SEEN_NONE) |
4868 | /* This is the first end-of-line. */ | |
4869 | eol_seen = this_eol; | |
4870 | else if (eol_seen != this_eol) | |
4871 | { | |
4872 | /* The found type is different from what found before. */ | |
4873 | eol_seen = EOL_SEEN_LF; | |
4874 | break; | |
4875 | } | |
4876 | if (++total == MAX_EOL_CHECK_COUNT) | |
4877 | break; | |
4878 | } | |
4879 | } | |
73be902c | 4880 | } |
df7492f9 | 4881 | return eol_seen; |
73be902c KH |
4882 | } |
4883 | ||
df7492f9 | 4884 | |
73be902c | 4885 | static void |
df7492f9 KH |
4886 | adjust_coding_eol_type (coding, eol_seen) |
4887 | struct coding_system *coding; | |
4888 | int eol_seen; | |
73be902c | 4889 | { |
0be8721c | 4890 | Lisp_Object eol_type; |
df7492f9 KH |
4891 | |
4892 | eol_type = CODING_ID_EOL_TYPE (coding->id); | |
4893 | if (eol_seen & EOL_SEEN_LF) | |
4894 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 0)); | |
4895 | else if (eol_type & EOL_SEEN_CRLF) | |
4896 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 1)); | |
4897 | else if (eol_type & EOL_SEEN_CR) | |
4898 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 2)); | |
d46c5b12 KH |
4899 | } |
4900 | ||
df7492f9 KH |
4901 | /* Detect how a text specified in CODING is encoded. If a coding |
4902 | system is detected, update fields of CODING by the detected coding | |
4903 | system. */ | |
4904 | ||
4905 | void | |
4906 | detect_coding (coding) | |
d46c5b12 | 4907 | struct coding_system *coding; |
d46c5b12 | 4908 | { |
df7492f9 KH |
4909 | unsigned char *src, *src_end; |
4910 | Lisp_Object attrs, coding_type; | |
d46c5b12 | 4911 | |
df7492f9 KH |
4912 | coding->consumed = coding->consumed_char = 0; |
4913 | coding->produced = coding->produced_char = 0; | |
4914 | coding_set_source (coding); | |
1c3478b0 | 4915 | |
df7492f9 | 4916 | src_end = coding->source + coding->src_bytes; |
1c3478b0 | 4917 | |
df7492f9 KH |
4918 | /* If we have not yet decided the text encoding type, detect it |
4919 | now. */ | |
4920 | if (EQ (CODING_ATTR_TYPE (CODING_ID_ATTRS (coding->id)), Qundecided)) | |
b73bfc1c | 4921 | { |
df7492f9 KH |
4922 | int mask = CATEGORY_MASK_ANY; |
4923 | int c, i; | |
4924 | ||
4925 | for (src = coding->source; src < src_end; src++) | |
4926 | { | |
4927 | c = *src; | |
4928 | if (c & 0x80 || (c < 0x20 && (c == ISO_CODE_ESC | |
4929 | || c == ISO_CODE_SI | |
4930 | || c == ISO_CODE_SO))) | |
4931 | break; | |
4932 | } | |
4933 | coding->head_ascii = src - (coding->source + coding->consumed); | |
4934 | ||
4935 | if (coding->head_ascii < coding->src_bytes) | |
1c3478b0 | 4936 | { |
df7492f9 KH |
4937 | int detected = 0; |
4938 | ||
4939 | for (i = 0; i < coding_category_raw_text; i++) | |
1c3478b0 | 4940 | { |
df7492f9 KH |
4941 | enum coding_category category = coding_priorities[i]; |
4942 | struct coding_system *this = coding_categories + category; | |
4943 | ||
4944 | if (category >= coding_category_raw_text | |
4945 | || detected & (1 << category)) | |
4946 | continue; | |
4947 | ||
4948 | if (this->id < 0) | |
1c3478b0 | 4949 | { |
df7492f9 KH |
4950 | /* No coding system of this category is defined. */ |
4951 | mask &= ~(1 << category); | |
4952 | } | |
4953 | else | |
4954 | { | |
4955 | detected |= detected_mask[category]; | |
4956 | if ((*(this->detector)) (coding, &mask)) | |
4957 | break; | |
1c3478b0 KH |
4958 | } |
4959 | } | |
df7492f9 KH |
4960 | if (! mask) |
4961 | setup_coding_system (Qraw_text, coding); | |
4962 | else if (mask != CATEGORY_MASK_ANY) | |
4963 | for (i = 0; i < coding_category_raw_text; i++) | |
4964 | { | |
4965 | enum coding_category category = coding_priorities[i]; | |
4966 | struct coding_system *this = coding_categories + category; | |
4967 | ||
4968 | if (mask & (1 << category)) | |
4969 | { | |
4970 | setup_coding_system (CODING_ID_NAME (this->id), coding); | |
4971 | break; | |
4972 | } | |
4973 | } | |
1c3478b0 | 4974 | } |
b73bfc1c | 4975 | } |
69f76525 | 4976 | |
df7492f9 KH |
4977 | attrs = CODING_ID_ATTRS (coding->id); |
4978 | coding_type = CODING_ATTR_TYPE (attrs); | |
4979 | ||
4980 | /* If we have not yet decided the EOL type, detect it now. But, the | |
4981 | detection is impossible for a CCL based coding system, in which | |
4982 | case, we detct the EOL type after decoding. */ | |
4983 | if (VECTORP (CODING_ID_EOL_TYPE (coding->id)) | |
4984 | && ! EQ (coding_type, Qccl)) | |
d46c5b12 | 4985 | { |
df7492f9 KH |
4986 | int eol_seen = detect_eol (coding, coding->source, coding->src_bytes); |
4987 | ||
4988 | if (eol_seen != EOL_SEEN_NONE) | |
4989 | adjust_coding_eol_type (coding, eol_seen); | |
d46c5b12 | 4990 | } |
4ed46869 KH |
4991 | } |
4992 | ||
aaaf0b1e KH |
4993 | |
4994 | static void | |
df7492f9 | 4995 | decode_eol (coding) |
aaaf0b1e | 4996 | struct coding_system *coding; |
aaaf0b1e | 4997 | { |
df7492f9 | 4998 | if (VECTORP (CODING_ID_EOL_TYPE (coding->id))) |
aaaf0b1e | 4999 | { |
df7492f9 KH |
5000 | unsigned char *p = CHAR_POS_ADDR (coding->dst_pos); |
5001 | unsigned char *pend = p + coding->produced; | |
5002 | int eol_seen = EOL_SEEN_NONE; | |
aaaf0b1e | 5003 | |
df7492f9 | 5004 | for (; p < pend; p++) |
aaaf0b1e | 5005 | { |
df7492f9 KH |
5006 | if (*p == '\n') |
5007 | eol_seen |= EOL_SEEN_LF; | |
5008 | else if (*p == '\r') | |
aaaf0b1e | 5009 | { |
df7492f9 | 5010 | if (p + 1 < pend && *(p + 1) == '\n') |
aaaf0b1e | 5011 | { |
df7492f9 KH |
5012 | eol_seen |= EOL_SEEN_CRLF; |
5013 | p++; | |
aaaf0b1e | 5014 | } |
aaaf0b1e | 5015 | else |
df7492f9 | 5016 | eol_seen |= EOL_SEEN_CR; |
aaaf0b1e | 5017 | } |
aaaf0b1e | 5018 | } |
df7492f9 KH |
5019 | if (eol_seen != EOL_SEEN_NONE) |
5020 | adjust_coding_eol_type (coding, eol_seen); | |
aaaf0b1e | 5021 | } |
aaaf0b1e | 5022 | |
df7492f9 KH |
5023 | if (EQ (CODING_ID_EOL_TYPE (coding->id), Qmac)) |
5024 | { | |
5025 | unsigned char *p = CHAR_POS_ADDR (coding->dst_pos); | |
5026 | unsigned char *pend = p + coding->produced; | |
5027 | ||
5028 | for (; p < pend; p++) | |
5029 | if (*p == '\r') | |
5030 | *p = '\n'; | |
5031 | } | |
5032 | else if (EQ (CODING_ID_EOL_TYPE (coding->id), Qdos)) | |
5033 | { | |
5034 | unsigned char *p, *pbeg, *pend; | |
5035 | Lisp_Object undo_list; | |
5036 | ||
5037 | move_gap_both (coding->dst_pos + coding->produced_char, | |
5038 | coding->dst_pos_byte + coding->produced); | |
5039 | undo_list = current_buffer->undo_list; | |
5040 | current_buffer->undo_list = Qt; | |
5041 | del_range_2 (coding->dst_pos, coding->dst_pos_byte, GPT, GPT_BYTE, Qnil); | |
5042 | current_buffer->undo_list = undo_list; | |
5043 | pbeg = GPT_ADDR; | |
5044 | pend = pbeg + coding->produced; | |
5045 | ||
5046 | for (p = pend - 1; p >= pbeg; p--) | |
5047 | if (*p == '\r') | |
5048 | { | |
5049 | safe_bcopy ((char *) (p + 1), (char *) p, pend - p - 1); | |
5050 | pend--; | |
5051 | } | |
5052 | coding->produced_char -= coding->produced - (pend - pbeg); | |
5053 | coding->produced = pend - pbeg; | |
5054 | insert_from_gap (coding->produced_char, coding->produced); | |
aaaf0b1e KH |
5055 | } |
5056 | } | |
5057 | ||
df7492f9 KH |
5058 | static void |
5059 | translate_chars (coding, table) | |
4ed46869 | 5060 | struct coding_system *coding; |
df7492f9 | 5061 | Lisp_Object table; |
4ed46869 | 5062 | { |
df7492f9 KH |
5063 | int *charbuf = coding->charbuf; |
5064 | int *charbuf_end = charbuf + coding->charbuf_used; | |
5065 | int c; | |
5066 | ||
5067 | if (coding->chars_at_source) | |
5068 | return; | |
4ed46869 | 5069 | |
df7492f9 | 5070 | while (charbuf < charbuf_end) |
8844fa83 | 5071 | { |
df7492f9 KH |
5072 | c = *charbuf; |
5073 | if (c < 0) | |
5074 | charbuf += c; | |
5075 | else | |
5076 | *charbuf++ = translate_char (table, c); | |
8844fa83 | 5077 | } |
df7492f9 | 5078 | } |
4ed46869 | 5079 | |
df7492f9 KH |
5080 | static int |
5081 | produce_chars (coding) | |
5082 | struct coding_system *coding; | |
5083 | { | |
5084 | unsigned char *dst = coding->destination + coding->produced; | |
5085 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
5086 | int produced; | |
5087 | int produced_chars = 0; | |
b73bfc1c | 5088 | |
df7492f9 | 5089 | if (! coding->chars_at_source) |
4ed46869 | 5090 | { |
df7492f9 KH |
5091 | /* Characters are in coding->charbuf. */ |
5092 | int *buf = coding->charbuf; | |
5093 | int *buf_end = buf + coding->charbuf_used; | |
5094 | unsigned char *adjusted_dst_end; | |
4ed46869 | 5095 | |
df7492f9 KH |
5096 | if (BUFFERP (coding->src_object) |
5097 | && EQ (coding->src_object, coding->dst_object)) | |
5098 | dst_end = coding->source + coding->consumed; | |
5099 | adjusted_dst_end = dst_end - MAX_MULTIBYTE_LENGTH; | |
4ed46869 | 5100 | |
df7492f9 KH |
5101 | while (buf < buf_end) |
5102 | { | |
5103 | int c = *buf++; | |
5104 | ||
5105 | if (dst >= adjusted_dst_end) | |
5106 | { | |
5107 | dst = alloc_destination (coding, | |
5108 | buf_end - buf + MAX_MULTIBYTE_LENGTH, | |
5109 | dst); | |
5110 | dst_end = coding->destination + coding->dst_bytes; | |
5111 | adjusted_dst_end = dst_end - MAX_MULTIBYTE_LENGTH; | |
5112 | } | |
5113 | if (c >= 0) | |
5114 | { | |
5115 | if (coding->dst_multibyte | |
5116 | || ! CHAR_BYTE8_P (c)) | |
5117 | CHAR_STRING_ADVANCE (c, dst); | |
5118 | else | |
5119 | *dst++ = CHAR_TO_BYTE8 (c); | |
5120 | produced_chars++; | |
5121 | } | |
5122 | else | |
5123 | /* This is an annotation data. */ | |
5124 | buf -= c + 1; | |
5125 | } | |
5126 | } | |
5127 | else | |
5128 | { | |
df7492f9 KH |
5129 | unsigned char *src = coding->source; |
5130 | unsigned char *src_end = src + coding->src_bytes; | |
5131 | Lisp_Object eol_type; | |
b73bfc1c | 5132 | |
df7492f9 | 5133 | eol_type = CODING_ID_EOL_TYPE (coding->id); |
4ed46869 | 5134 | |
df7492f9 | 5135 | if (coding->src_multibyte != coding->dst_multibyte) |
aaaf0b1e | 5136 | { |
df7492f9 KH |
5137 | if (coding->src_multibyte) |
5138 | { | |
71c81426 | 5139 | int multibytep = 1; |
df7492f9 | 5140 | int consumed_chars; |
d46c5b12 | 5141 | |
df7492f9 KH |
5142 | while (1) |
5143 | { | |
5144 | unsigned char *src_base = src; | |
5145 | int c; | |
b73bfc1c | 5146 | |
df7492f9 KH |
5147 | ONE_MORE_BYTE (c); |
5148 | if (c == '\r') | |
5149 | { | |
5150 | if (EQ (eol_type, Qdos)) | |
5151 | { | |
5152 | if (src < src_end | |
5153 | && *src == '\n') | |
5154 | c = *src++; | |
5155 | } | |
5156 | else if (EQ (eol_type, Qmac)) | |
5157 | c = '\n'; | |
5158 | } | |
5159 | if (dst == dst_end) | |
5160 | { | |
2c78b7e1 | 5161 | coding->consumed = src - coding->source; |
b73bfc1c | 5162 | |
2c78b7e1 KH |
5163 | if (EQ (coding->src_object, coding->dst_object)) |
5164 | dst_end = src; | |
5165 | if (dst == dst_end) | |
5166 | { | |
5167 | dst = alloc_destination (coding, src_end - src + 1, | |
5168 | dst); | |
5169 | dst_end = coding->destination + coding->dst_bytes; | |
5170 | coding_set_source (coding); | |
5171 | src = coding->source + coding->consumed; | |
5172 | src_end = coding->source + coding->src_bytes; | |
5173 | } | |
df7492f9 KH |
5174 | } |
5175 | *dst++ = c; | |
5176 | produced_chars++; | |
5177 | } | |
5178 | no_more_source: | |
5179 | ; | |
5180 | } | |
5181 | else | |
5182 | while (src < src_end) | |
5183 | { | |
71c81426 | 5184 | int multibytep = 1; |
df7492f9 | 5185 | int c = *src++; |
b73bfc1c | 5186 | |
df7492f9 KH |
5187 | if (c == '\r') |
5188 | { | |
5189 | if (EQ (eol_type, Qdos)) | |
5190 | { | |
5191 | if (src < src_end | |
5192 | && *src == '\n') | |
5193 | c = *src++; | |
5194 | } | |
5195 | else if (EQ (eol_type, Qmac)) | |
5196 | c = '\n'; | |
5197 | } | |
5198 | if (dst >= dst_end - 1) | |
5199 | { | |
2c78b7e1 | 5200 | coding->consumed = src - coding->source; |
df7492f9 | 5201 | |
2c78b7e1 KH |
5202 | if (EQ (coding->src_object, coding->dst_object)) |
5203 | dst_end = src; | |
5204 | if (dst >= dst_end - 1) | |
5205 | { | |
5206 | dst = alloc_destination (coding, src_end - src + 2, | |
5207 | dst); | |
5208 | dst_end = coding->destination + coding->dst_bytes; | |
5209 | coding_set_source (coding); | |
5210 | src = coding->source + coding->consumed; | |
5211 | src_end = coding->source + coding->src_bytes; | |
5212 | } | |
df7492f9 KH |
5213 | } |
5214 | EMIT_ONE_BYTE (c); | |
5215 | } | |
d46c5b12 | 5216 | } |
df7492f9 KH |
5217 | else |
5218 | { | |
5219 | if (!EQ (coding->src_object, coding->dst_object)) | |
5220 | { | |
5221 | int require = coding->src_bytes - coding->dst_bytes; | |
4ed46869 | 5222 | |
df7492f9 KH |
5223 | if (require > 0) |
5224 | { | |
5225 | EMACS_INT offset = src - coding->source; | |
5226 | ||
5227 | dst = alloc_destination (coding, require, dst); | |
5228 | coding_set_source (coding); | |
5229 | src = coding->source + offset; | |
5230 | src_end = coding->source + coding->src_bytes; | |
5231 | } | |
5232 | } | |
5233 | produced_chars = coding->src_chars; | |
5234 | while (src < src_end) | |
5235 | { | |
5236 | int c = *src++; | |
5237 | ||
5238 | if (c == '\r') | |
5239 | { | |
5240 | if (EQ (eol_type, Qdos)) | |
5241 | { | |
5242 | if (src < src_end | |
5243 | && *src == '\n') | |
5244 | c = *src++; | |
5245 | produced_chars--; | |
5246 | } | |
5247 | else if (EQ (eol_type, Qmac)) | |
5248 | c = '\n'; | |
5249 | } | |
5250 | *dst++ = c; | |
5251 | } | |
5252 | } | |
2c78b7e1 KH |
5253 | coding->consumed = coding->src_bytes; |
5254 | coding->consumed_char = coding->src_chars; | |
b73bfc1c | 5255 | } |
4ed46869 | 5256 | |
df7492f9 KH |
5257 | produced = dst - (coding->destination + coding->produced); |
5258 | if (BUFFERP (coding->dst_object)) | |
5259 | insert_from_gap (produced_chars, produced); | |
5260 | coding->produced += produced; | |
5261 | coding->produced_char += produced_chars; | |
5262 | return produced_chars; | |
b73bfc1c | 5263 | } |
52d41803 | 5264 | |
df7492f9 KH |
5265 | /* [ -LENGTH CHAR_POS_OFFSET MASK METHOD COMP_LEN ] |
5266 | or | |
5267 | [ -LENGTH CHAR_POS_OFFSET MASK METHOD COMP_LEN COMPONENTS... ] | |
5268 | */ | |
4ed46869 | 5269 | |
df7492f9 KH |
5270 | static INLINE void |
5271 | produce_composition (coding, charbuf) | |
4ed46869 | 5272 | struct coding_system *coding; |
df7492f9 | 5273 | int *charbuf; |
4ed46869 | 5274 | { |
df7492f9 KH |
5275 | Lisp_Object buffer; |
5276 | int len; | |
5277 | EMACS_INT pos; | |
5278 | enum composition_method method; | |
5279 | int cmp_len; | |
5280 | Lisp_Object components; | |
5281 | ||
5282 | buffer = coding->dst_object; | |
5283 | len = -charbuf[0]; | |
5284 | pos = coding->dst_pos + charbuf[1]; | |
5285 | method = (enum composition_method) (charbuf[3]); | |
5286 | cmp_len = charbuf[4]; | |
5287 | ||
5288 | if (method == COMPOSITION_RELATIVE) | |
5289 | components = Qnil; | |
5290 | else | |
d46c5b12 | 5291 | { |
df7492f9 KH |
5292 | Lisp_Object args[MAX_COMPOSITION_COMPONENTS * 2 - 1]; |
5293 | int i; | |
4ed46869 | 5294 | |
df7492f9 KH |
5295 | len -= 5; |
5296 | charbuf += 5; | |
5297 | for (i = 0; i < len; i++) | |
5298 | args[i] = make_number (charbuf[i]); | |
5299 | components = (method == COMPOSITION_WITH_ALTCHARS | |
5300 | ? Fstring (len, args) : Fvector (len, args)); | |
5301 | } | |
5302 | compose_text (pos, pos + cmp_len, components, Qnil, Qnil); | |
5303 | } | |
b73bfc1c | 5304 | |
df7492f9 KH |
5305 | static int * |
5306 | save_composition_data (buf, buf_end, prop) | |
5307 | int *buf, *buf_end; | |
5308 | Lisp_Object prop; | |
5309 | { | |
5310 | enum composition_method method = COMPOSITION_METHOD (prop); | |
5311 | int cmp_len = COMPOSITION_LENGTH (prop); | |
4ed46869 | 5312 | |
df7492f9 KH |
5313 | if (buf + 4 + (MAX_COMPOSITION_COMPONENTS * 2 - 1) > buf_end) |
5314 | return NULL; | |
d46c5b12 | 5315 | |
df7492f9 KH |
5316 | buf[1] = CODING_ANNOTATE_COMPOSITION_MASK; |
5317 | buf[2] = method; | |
5318 | buf[3] = cmp_len; | |
b73bfc1c | 5319 | |
df7492f9 KH |
5320 | if (method == COMPOSITION_RELATIVE) |
5321 | buf[0] = 4; | |
5322 | else | |
b73bfc1c | 5323 | { |
df7492f9 KH |
5324 | Lisp_Object components; |
5325 | int len, i; | |
b73bfc1c | 5326 | |
df7492f9 KH |
5327 | components = COMPOSITION_COMPONENTS (prop); |
5328 | if (VECTORP (components)) | |
d46c5b12 | 5329 | { |
df7492f9 KH |
5330 | len = XVECTOR (components)->size; |
5331 | for (i = 0; i < len; i++) | |
5332 | buf[4 + i] = XINT (AREF (components, i)); | |
5333 | } | |
5334 | else if (STRINGP (components)) | |
5335 | { | |
5336 | int i_byte; | |
b73bfc1c | 5337 | |
df7492f9 KH |
5338 | len = XSTRING (components)->size; |
5339 | i = i_byte = 0; | |
5340 | while (i < len) | |
5341 | FETCH_STRING_CHAR_ADVANCE (buf[4 + i], components, i, i_byte); | |
5342 | } | |
5343 | else if (INTEGERP (components)) | |
5344 | { | |
5345 | len = 1; | |
5346 | buf[4] = XINT (components); | |
5347 | } | |
5348 | else if (CONSP (components)) | |
5349 | { | |
5350 | for (len = 0; CONSP (components); | |
5351 | len++, components = XCDR (components)) | |
5352 | buf[4 + len] = XINT (XCAR (components)); | |
d46c5b12 | 5353 | } |
df7492f9 KH |
5354 | else |
5355 | abort (); | |
5356 | buf[0] = 4 + len; | |
4ed46869 | 5357 | } |
df7492f9 | 5358 | return (buf + buf[0]); |
4ed46869 KH |
5359 | } |
5360 | ||
df7492f9 KH |
5361 | #define CHARBUF_SIZE 0x4000 |
5362 | ||
5363 | #define ALLOC_CONVERSION_WORK_AREA(coding) \ | |
5364 | do { \ | |
5365 | int size = CHARBUF_SIZE;; \ | |
5366 | \ | |
5367 | coding->charbuf = NULL; \ | |
5368 | while (size > 1024) \ | |
5369 | { \ | |
5370 | coding->charbuf = (int *) alloca (sizeof (int) * size); \ | |
5371 | if (coding->charbuf) \ | |
5372 | break; \ | |
5373 | size >>= 1; \ | |
5374 | } \ | |
5375 | if (! coding->charbuf) \ | |
5376 | { \ | |
5377 | coding->result = CODING_RESULT_INSUFFICIENT_MEM; \ | |
5378 | return coding->result; \ | |
5379 | } \ | |
5380 | coding->charbuf_size = size; \ | |
5381 | } while (0) | |
4ed46869 | 5382 | |
d46c5b12 KH |
5383 | |
5384 | static void | |
df7492f9 | 5385 | produce_annotation (coding) |
d46c5b12 | 5386 | struct coding_system *coding; |
d46c5b12 | 5387 | { |
df7492f9 KH |
5388 | int *charbuf = coding->charbuf; |
5389 | int *charbuf_end = charbuf + coding->charbuf_used; | |
d46c5b12 | 5390 | |
df7492f9 | 5391 | while (charbuf < charbuf_end) |
d46c5b12 | 5392 | { |
df7492f9 KH |
5393 | if (*charbuf >= 0) |
5394 | charbuf++; | |
d46c5b12 | 5395 | else |
d46c5b12 | 5396 | { |
df7492f9 KH |
5397 | int len = -*charbuf; |
5398 | switch (charbuf[2]) | |
5399 | { | |
5400 | case CODING_ANNOTATE_COMPOSITION_MASK: | |
5401 | produce_composition (coding, charbuf); | |
5402 | break; | |
5403 | default: | |
5404 | abort (); | |
5405 | } | |
5406 | charbuf += len; | |
d46c5b12 | 5407 | } |
df7492f9 KH |
5408 | } |
5409 | } | |
d46c5b12 | 5410 | |
df7492f9 KH |
5411 | /* Decode the data at CODING->src_object into CODING->dst_object. |
5412 | CODING->src_object is a buffer, a string, or nil. | |
5413 | CODING->dst_object is a buffer. | |
de79a6a5 | 5414 | |
df7492f9 KH |
5415 | If CODING->src_object is a buffer, it must be the current buffer. |
5416 | In this case, if CODING->src_pos is positive, it is a position of | |
5417 | the source text in the buffer, otherwise, the source text is in the | |
5418 | gap area of the buffer, and CODING->src_pos specifies the offset of | |
5419 | the text from GPT (which must be the same as PT). If this is the | |
5420 | same buffer as CODING->dst_object, CODING->src_pos must be | |
5421 | negative. | |
b73bfc1c | 5422 | |
df7492f9 KH |
5423 | If CODING->src_object is a string, CODING->src_pos in an index to |
5424 | that string. | |
d46c5b12 | 5425 | |
df7492f9 KH |
5426 | If CODING->src_object is nil, CODING->source must already point to |
5427 | the non-relocatable memory area. In this case, CODING->src_pos is | |
5428 | an offset from CODING->source. | |
d46c5b12 | 5429 | |
df7492f9 KH |
5430 | The decoded data is inserted at the current point of the buffer |
5431 | CODING->dst_object. | |
5432 | */ | |
5433 | ||
5434 | static int | |
5435 | decode_coding (coding) | |
d46c5b12 | 5436 | struct coding_system *coding; |
d46c5b12 | 5437 | { |
df7492f9 | 5438 | Lisp_Object attrs; |
d46c5b12 | 5439 | |
df7492f9 KH |
5440 | if (BUFFERP (coding->src_object) |
5441 | && coding->src_pos > 0 | |
5442 | && coding->src_pos < GPT | |
5443 | && coding->src_pos + coding->src_chars > GPT) | |
5444 | move_gap_both (coding->src_pos, coding->src_pos_byte); | |
d46c5b12 | 5445 | |
df7492f9 | 5446 | if (BUFFERP (coding->dst_object)) |
88993dfd | 5447 | { |
df7492f9 KH |
5448 | if (current_buffer != XBUFFER (coding->dst_object)) |
5449 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
5450 | if (GPT != PT) | |
5451 | move_gap_both (PT, PT_BYTE); | |
88993dfd KH |
5452 | } |
5453 | ||
df7492f9 KH |
5454 | coding->consumed = coding->consumed_char = 0; |
5455 | coding->produced = coding->produced_char = 0; | |
5456 | coding->chars_at_source = 0; | |
5457 | coding->result = CODING_RESULT_SUCCESS; | |
5458 | coding->errors = 0; | |
5459 | ||
5460 | ALLOC_CONVERSION_WORK_AREA (coding); | |
5461 | ||
5462 | attrs = CODING_ID_ATTRS (coding->id); | |
5463 | ||
5464 | do | |
d46c5b12 | 5465 | { |
df7492f9 KH |
5466 | coding_set_source (coding); |
5467 | coding->annotated = 0; | |
5468 | (*(coding->decoder)) (coding); | |
5469 | if (!NILP (CODING_ATTR_DECODE_TBL (attrs))) | |
5470 | translate_chars (CODING_ATTR_DECODE_TBL (attrs), coding); | |
5471 | coding_set_destination (coding); | |
5472 | produce_chars (coding); | |
5473 | if (coding->annotated) | |
5474 | produce_annotation (coding); | |
d46c5b12 | 5475 | } |
df7492f9 KH |
5476 | while (coding->consumed < coding->src_bytes |
5477 | && ! coding->result); | |
d46c5b12 | 5478 | |
df7492f9 KH |
5479 | if (EQ (CODING_ATTR_TYPE (CODING_ID_ATTRS (coding->id)), Qccl) |
5480 | && SYMBOLP (CODING_ID_EOL_TYPE (coding->id)) | |
5481 | && ! EQ (CODING_ID_EOL_TYPE (coding->id), Qunix)) | |
5482 | decode_eol (coding); | |
d46c5b12 | 5483 | |
df7492f9 KH |
5484 | coding->carryover_bytes = 0; |
5485 | if (coding->consumed < coding->src_bytes) | |
d46c5b12 | 5486 | { |
df7492f9 KH |
5487 | int nbytes = coding->src_bytes - coding->consumed; |
5488 | unsigned char *src; | |
5489 | ||
5490 | coding_set_source (coding); | |
5491 | coding_set_destination (coding); | |
5492 | src = coding->source + coding->consumed; | |
5493 | ||
5494 | if (coding->mode & CODING_MODE_LAST_BLOCK) | |
d46c5b12 | 5495 | { |
df7492f9 KH |
5496 | /* Flush out unprocessed data as binary chars. We are sure |
5497 | that the number of data is less than the size of | |
5498 | coding->charbuf. */ | |
5499 | int *charbuf = coding->charbuf; | |
5500 | ||
5501 | while (nbytes-- > 0) | |
d46c5b12 | 5502 | { |
df7492f9 KH |
5503 | int c = *src++; |
5504 | *charbuf++ = (c & 0x80 ? - c : c); | |
d46c5b12 | 5505 | } |
df7492f9 | 5506 | produce_chars (coding); |
d46c5b12 | 5507 | } |
d46c5b12 | 5508 | else |
df7492f9 KH |
5509 | { |
5510 | /* Record unprocessed bytes in coding->carryover. We are | |
5511 | sure that the number of data is less than the size of | |
5512 | coding->carryover. */ | |
5513 | unsigned char *p = coding->carryover; | |
5514 | ||
5515 | coding->carryover_bytes = nbytes; | |
5516 | while (nbytes-- > 0) | |
5517 | *p++ = *src++; | |
5518 | } | |
5519 | coding->consumed = coding->src_bytes; | |
5520 | } | |
b73bfc1c | 5521 | |
df7492f9 | 5522 | return coding->result; |
d46c5b12 KH |
5523 | } |
5524 | ||
df7492f9 KH |
5525 | static void |
5526 | consume_chars (coding) | |
5527 | struct coding_system *coding; | |
5528 | { | |
5529 | int *buf = coding->charbuf; | |
5530 | /* -1 is to compensate for CRLF. */ | |
5531 | int *buf_end = coding->charbuf + coding->charbuf_size - 1; | |
5532 | unsigned char *src = coding->source + coding->consumed; | |
5533 | int pos = coding->src_pos + coding->consumed_char; | |
5534 | int end_pos = coding->src_pos + coding->src_chars; | |
5535 | int multibytep = coding->src_multibyte; | |
5536 | Lisp_Object eol_type; | |
5537 | int c; | |
5538 | int start, end, stop; | |
5539 | Lisp_Object object, prop; | |
88993dfd | 5540 | |
df7492f9 KH |
5541 | eol_type = CODING_ID_EOL_TYPE (coding->id); |
5542 | if (VECTORP (eol_type)) | |
5543 | eol_type = Qunix; | |
88993dfd | 5544 | |
df7492f9 | 5545 | object = coding->src_object; |
b843d1ae | 5546 | |
df7492f9 KH |
5547 | /* Note: composition handling is not yet implemented. */ |
5548 | coding->common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
ec6d2bb8 | 5549 | |
df7492f9 KH |
5550 | if (coding->common_flags & CODING_ANNOTATE_COMPOSITION_MASK |
5551 | && find_composition (pos, end_pos, &start, &end, &prop, object) | |
5552 | && end <= end_pos | |
5553 | && (start >= pos | |
5554 | || (find_composition (end, end_pos, &start, &end, &prop, object) | |
5555 | && end <= end_pos))) | |
5556 | stop = start; | |
5557 | else | |
5558 | stop = end_pos; | |
ec6d2bb8 | 5559 | |
df7492f9 | 5560 | while (buf < buf_end) |
ec6d2bb8 | 5561 | { |
df7492f9 | 5562 | if (pos == stop) |
ec6d2bb8 | 5563 | { |
df7492f9 | 5564 | int *p; |
ec6d2bb8 | 5565 | |
df7492f9 KH |
5566 | if (pos == end_pos) |
5567 | break; | |
5568 | p = save_composition_data (buf, buf_end, prop); | |
5569 | if (p == NULL) | |
5570 | break; | |
5571 | buf = p; | |
5572 | if (find_composition (end, end_pos, &start, &end, &prop, object) | |
5573 | && end <= end_pos) | |
5574 | stop = start; | |
5575 | else | |
5576 | stop = end_pos; | |
5577 | } | |
5578 | ||
5579 | if (! multibytep) | |
5580 | c = *src++; | |
5581 | else | |
5582 | c = STRING_CHAR_ADVANCE (src); | |
5583 | if ((c == '\r') && (coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) | |
5584 | c = '\n'; | |
5585 | if (! EQ (eol_type, Qunix)) | |
5586 | { | |
5587 | if (c == '\n') | |
5588 | { | |
5589 | if (EQ (eol_type, Qdos)) | |
5590 | *buf++ = '\r'; | |
5591 | else | |
5592 | c = '\r'; | |
ec6d2bb8 | 5593 | } |
ec6d2bb8 | 5594 | } |
df7492f9 KH |
5595 | *buf++ = c; |
5596 | pos++; | |
ec6d2bb8 | 5597 | } |
ec6d2bb8 | 5598 | |
df7492f9 KH |
5599 | coding->consumed = src - coding->source; |
5600 | coding->consumed_char = pos - coding->src_pos; | |
5601 | coding->charbuf_used = buf - coding->charbuf; | |
5602 | coding->chars_at_source = 0; | |
ec6d2bb8 KH |
5603 | } |
5604 | ||
ec6d2bb8 | 5605 | |
df7492f9 KH |
5606 | /* Encode the text at CODING->src_object into CODING->dst_object. |
5607 | CODING->src_object is a buffer or a string. | |
5608 | CODING->dst_object is a buffer or nil. | |
5609 | ||
5610 | If CODING->src_object is a buffer, it must be the current buffer. | |
5611 | In this case, if CODING->src_pos is positive, it is a position of | |
5612 | the source text in the buffer, otherwise. the source text is in the | |
5613 | gap area of the buffer, and coding->src_pos specifies the offset of | |
5614 | the text from GPT (which must be the same as PT). If this is the | |
5615 | same buffer as CODING->dst_object, CODING->src_pos must be | |
5616 | negative and CODING should not have `pre-write-conversion'. | |
5617 | ||
5618 | If CODING->src_object is a string, CODING should not have | |
5619 | `pre-write-conversion'. | |
5620 | ||
5621 | If CODING->dst_object is a buffer, the encoded data is inserted at | |
5622 | the current point of that buffer. | |
5623 | ||
5624 | If CODING->dst_object is nil, the encoded data is placed at the | |
5625 | memory area specified by CODING->destination. */ | |
5626 | ||
5627 | static int | |
5628 | encode_coding (coding) | |
ec6d2bb8 | 5629 | struct coding_system *coding; |
ec6d2bb8 | 5630 | { |
df7492f9 | 5631 | Lisp_Object attrs; |
ec6d2bb8 | 5632 | |
df7492f9 | 5633 | attrs = CODING_ID_ATTRS (coding->id); |
ec6d2bb8 | 5634 | |
df7492f9 | 5635 | if (BUFFERP (coding->dst_object)) |
ec6d2bb8 | 5636 | { |
df7492f9 KH |
5637 | set_buffer_internal (XBUFFER (coding->dst_object)); |
5638 | coding->dst_multibyte | |
5639 | = ! NILP (current_buffer->enable_multibyte_characters); | |
5640 | } | |
ec6d2bb8 | 5641 | |
df7492f9 KH |
5642 | coding->consumed = coding->consumed_char = 0; |
5643 | coding->produced = coding->produced_char = 0; | |
5644 | coding->result = CODING_RESULT_SUCCESS; | |
5645 | coding->errors = 0; | |
ec6d2bb8 | 5646 | |
df7492f9 | 5647 | ALLOC_CONVERSION_WORK_AREA (coding); |
ec6d2bb8 | 5648 | |
df7492f9 KH |
5649 | do { |
5650 | coding_set_source (coding); | |
5651 | consume_chars (coding); | |
5652 | ||
5653 | if (!NILP (CODING_ATTR_ENCODE_TBL (attrs))) | |
5654 | translate_chars (CODING_ATTR_ENCODE_TBL (attrs), coding); | |
5655 | ||
5656 | coding_set_destination (coding); | |
5657 | (*(coding->encoder)) (coding); | |
5658 | } while (coding->consumed_char < coding->src_chars); | |
5659 | ||
5660 | if (BUFFERP (coding->dst_object)) | |
5661 | insert_from_gap (coding->produced_char, coding->produced); | |
5662 | ||
5663 | return (coding->result); | |
ec6d2bb8 KH |
5664 | } |
5665 | ||
df7492f9 | 5666 | /* Work buffer */ |
fb88bf2d | 5667 | |
df7492f9 KH |
5668 | /* List of currently used working buffer. */ |
5669 | Lisp_Object Vcode_conversion_work_buf_list; | |
d46c5b12 | 5670 | |
df7492f9 KH |
5671 | /* A working buffer used by the top level conversion. */ |
5672 | Lisp_Object Vcode_conversion_reused_work_buf; | |
b73bfc1c | 5673 | |
4ed46869 | 5674 | |
df7492f9 KH |
5675 | /* Return a working buffer that can be freely used by the following |
5676 | code conversion. MULTIBYTEP specifies the multibyteness of the | |
5677 | buffer. */ | |
b73bfc1c | 5678 | |
df7492f9 KH |
5679 | Lisp_Object |
5680 | make_conversion_work_buffer (multibytep) | |
5681 | int multibytep; | |
5682 | { | |
5683 | struct buffer *current = current_buffer; | |
5684 | Lisp_Object buf; | |
d46c5b12 | 5685 | |
df7492f9 | 5686 | if (NILP (Vcode_conversion_work_buf_list)) |
e133c8fa | 5687 | { |
df7492f9 KH |
5688 | if (NILP (Vcode_conversion_reused_work_buf)) |
5689 | Vcode_conversion_reused_work_buf | |
5690 | = Fget_buffer_create (build_string (" *code-conversion-work*")); | |
5691 | Vcode_conversion_work_buf_list | |
5692 | = Fcons (Vcode_conversion_reused_work_buf, Qnil); | |
e133c8fa | 5693 | } |
df7492f9 | 5694 | else |
d46c5b12 | 5695 | { |
df7492f9 KH |
5696 | int depth = Flength (Vcode_conversion_work_buf_list); |
5697 | char str[128]; | |
e077cc80 | 5698 | |
df7492f9 KH |
5699 | sprintf (str, " *code-conversion-work*<%d>", depth); |
5700 | Vcode_conversion_work_buf_list | |
5701 | = Fcons (Fget_buffer_create (build_string (str)), | |
5702 | Vcode_conversion_work_buf_list); | |
d46c5b12 | 5703 | } |
d46c5b12 | 5704 | |
df7492f9 KH |
5705 | buf = XCAR (Vcode_conversion_work_buf_list); |
5706 | set_buffer_internal (XBUFFER (buf)); | |
5707 | current_buffer->undo_list = Qt; | |
5708 | Ferase_buffer (); | |
5709 | Fset_buffer_multibyte (multibytep ? Qt : Qnil); | |
5710 | set_buffer_internal (current); | |
5711 | return buf; | |
5712 | } | |
d46c5b12 | 5713 | |
df7492f9 | 5714 | static struct coding_system *saved_coding; |
d46c5b12 | 5715 | |
df7492f9 KH |
5716 | Lisp_Object |
5717 | code_conversion_restore (info) | |
5718 | Lisp_Object info; | |
5719 | { | |
5720 | int depth = Flength (Vcode_conversion_work_buf_list); | |
5721 | Lisp_Object buf; | |
d46c5b12 | 5722 | |
df7492f9 | 5723 | if (depth > 0) |
d46c5b12 | 5724 | { |
df7492f9 KH |
5725 | buf = XCAR (Vcode_conversion_work_buf_list); |
5726 | Vcode_conversion_work_buf_list = XCDR (Vcode_conversion_work_buf_list); | |
5727 | if (depth > 1 && !NILP (Fbuffer_live_p (buf))) | |
5728 | Fkill_buffer (buf); | |
5729 | } | |
d46c5b12 | 5730 | |
df7492f9 KH |
5731 | if (saved_coding->dst_object == Qt |
5732 | && saved_coding->destination) | |
5733 | xfree (saved_coding->destination); | |
b843d1ae | 5734 | |
df7492f9 KH |
5735 | return save_excursion_restore (info); |
5736 | } | |
d46c5b12 | 5737 | |
12410ef1 | 5738 | |
df7492f9 KH |
5739 | int |
5740 | decode_coding_gap (coding, chars, bytes) | |
5741 | struct coding_system *coding; | |
5742 | EMACS_INT chars, bytes; | |
5743 | { | |
5744 | int count = specpdl_ptr - specpdl; | |
fb88bf2d | 5745 | |
df7492f9 KH |
5746 | saved_coding = coding; |
5747 | record_unwind_protect (code_conversion_restore, save_excursion_save ()); | |
ec6d2bb8 | 5748 | |
df7492f9 KH |
5749 | coding->src_object = Fcurrent_buffer (); |
5750 | coding->src_chars = chars; | |
5751 | coding->src_bytes = bytes; | |
5752 | coding->src_pos = -chars; | |
5753 | coding->src_pos_byte = -bytes; | |
5754 | coding->src_multibyte = chars < bytes; | |
5755 | coding->dst_object = coding->src_object; | |
5756 | coding->dst_pos = PT; | |
5757 | coding->dst_pos_byte = PT_BYTE; | |
71c81426 | 5758 | coding->dst_multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
4956c225 | 5759 | |
df7492f9 KH |
5760 | if (CODING_REQUIRE_DETECTION (coding)) |
5761 | detect_coding (coding); | |
5762 | ||
5763 | decode_coding (coding); | |
d46c5b12 | 5764 | |
df7492f9 KH |
5765 | unbind_to (count, Qnil); |
5766 | return coding->result; | |
5767 | } | |
d46c5b12 | 5768 | |
df7492f9 KH |
5769 | int |
5770 | encode_coding_gap (coding, chars, bytes) | |
5771 | struct coding_system *coding; | |
5772 | EMACS_INT chars, bytes; | |
5773 | { | |
5774 | int count = specpdl_ptr - specpdl; | |
5775 | Lisp_Object buffer; | |
d46c5b12 | 5776 | |
df7492f9 KH |
5777 | saved_coding = coding; |
5778 | record_unwind_protect (code_conversion_restore, save_excursion_save ()); | |
fb88bf2d | 5779 | |
df7492f9 KH |
5780 | buffer = Fcurrent_buffer (); |
5781 | coding->src_object = buffer; | |
5782 | coding->src_chars = chars; | |
5783 | coding->src_bytes = bytes; | |
5784 | coding->src_pos = -chars; | |
5785 | coding->src_pos_byte = -bytes; | |
5786 | coding->src_multibyte = chars < bytes; | |
5787 | coding->dst_object = coding->src_object; | |
5788 | coding->dst_pos = PT; | |
5789 | coding->dst_pos_byte = PT_BYTE; | |
fb88bf2d | 5790 | |
df7492f9 | 5791 | encode_coding (coding); |
f2558efd | 5792 | |
df7492f9 KH |
5793 | unbind_to (count, Qnil); |
5794 | return coding->result; | |
5795 | } | |
b73bfc1c | 5796 | |
d46c5b12 | 5797 | |
df7492f9 KH |
5798 | /* Decode the text in the range FROM/FROM_BYTE and TO/TO_BYTE in |
5799 | SRC_OBJECT into DST_OBJECT by coding context CODING. | |
ec6d2bb8 | 5800 | |
df7492f9 | 5801 | SRC_OBJECT is a buffer, a string, or Qnil. |
ec6d2bb8 | 5802 | |
df7492f9 KH |
5803 | If it is a buffer, the text is at point of the buffer. FROM and TO |
5804 | are positions in the buffer. | |
ec6d2bb8 | 5805 | |
df7492f9 KH |
5806 | If it is a string, the text is at the beginning of the string. |
5807 | FROM and TO are indices to the string. | |
ec6d2bb8 | 5808 | |
df7492f9 KH |
5809 | If it is nil, the text is at coding->source. FROM and TO are |
5810 | indices to coding->source. | |
ec6d2bb8 | 5811 | |
df7492f9 | 5812 | DST_OBJECT is a buffer, Qt, or Qnil. |
d46c5b12 | 5813 | |
df7492f9 KH |
5814 | If it is a buffer, the decoded text is inserted at point of the |
5815 | buffer. If the buffer is the same as SRC_OBJECT, the source text | |
5816 | is deleted. | |
d46c5b12 | 5817 | |
df7492f9 KH |
5818 | If it is Qt, a string is made from the decoded text, and |
5819 | set in CODING->dst_object. | |
d46c5b12 | 5820 | |
df7492f9 KH |
5821 | If it is Qnil, the decoded text is stored at CODING->destination. |
5822 | The called must allocate CODING->dst_bytes bytes at | |
5823 | CODING->destination by xmalloc. If the decoded text is longer than | |
5824 | CODING->dst_bytes, CODING->destination is relocated by xrealloc. | |
5825 | */ | |
d46c5b12 | 5826 | |
df7492f9 KH |
5827 | void |
5828 | decode_coding_object (coding, src_object, from, from_byte, to, to_byte, | |
5829 | dst_object) | |
5830 | struct coding_system *coding; | |
5831 | Lisp_Object src_object; | |
5832 | EMACS_INT from, from_byte, to, to_byte; | |
5833 | Lisp_Object dst_object; | |
5834 | { | |
5835 | int count = specpdl_ptr - specpdl; | |
5836 | unsigned char *destination; | |
5837 | EMACS_INT dst_bytes; | |
5838 | EMACS_INT chars = to - from; | |
5839 | EMACS_INT bytes = to_byte - from_byte; | |
5840 | Lisp_Object attrs; | |
d46c5b12 | 5841 | |
df7492f9 KH |
5842 | saved_coding = coding; |
5843 | record_unwind_protect (code_conversion_restore, save_excursion_save ()); | |
93dec019 | 5844 | |
df7492f9 KH |
5845 | if (NILP (dst_object)) |
5846 | { | |
5847 | destination = coding->destination; | |
5848 | dst_bytes = coding->dst_bytes; | |
5849 | } | |
93dec019 | 5850 | |
df7492f9 KH |
5851 | coding->src_object = src_object; |
5852 | coding->src_chars = chars; | |
5853 | coding->src_bytes = bytes; | |
5854 | coding->src_multibyte = chars < bytes; | |
70ad9fc4 | 5855 | |
df7492f9 KH |
5856 | if (STRINGP (src_object)) |
5857 | { | |
5858 | coding->src_pos = from; | |
5859 | coding->src_pos_byte = from_byte; | |
5860 | } | |
5861 | else if (BUFFERP (src_object)) | |
5862 | { | |
5863 | set_buffer_internal (XBUFFER (src_object)); | |
5864 | if (from != GPT) | |
5865 | move_gap_both (from, from_byte); | |
5866 | if (EQ (src_object, dst_object)) | |
fb88bf2d | 5867 | { |
df7492f9 KH |
5868 | TEMP_SET_PT_BOTH (from, from_byte); |
5869 | del_range_both (from, from_byte, to, to_byte, 1); | |
5870 | coding->src_pos = -chars; | |
5871 | coding->src_pos_byte = -bytes; | |
fb88bf2d | 5872 | } |
df7492f9 | 5873 | else |
fb88bf2d | 5874 | { |
df7492f9 KH |
5875 | coding->src_pos = from; |
5876 | coding->src_pos_byte = from_byte; | |
fb88bf2d | 5877 | } |
d46c5b12 | 5878 | } |
fb88bf2d | 5879 | |
df7492f9 KH |
5880 | if (CODING_REQUIRE_DETECTION (coding)) |
5881 | detect_coding (coding); | |
5882 | attrs = CODING_ID_ATTRS (coding->id); | |
5883 | ||
5884 | if (! NILP (CODING_ATTR_POST_READ (attrs)) | |
5885 | || EQ (dst_object, Qt)) | |
b73bfc1c | 5886 | { |
df7492f9 KH |
5887 | coding->dst_object = make_conversion_work_buffer (1); |
5888 | coding->dst_pos = BEG; | |
5889 | coding->dst_pos_byte = BEG_BYTE; | |
5890 | coding->dst_multibyte = 1; | |
b73bfc1c | 5891 | } |
df7492f9 | 5892 | else if (BUFFERP (dst_object)) |
12410ef1 | 5893 | { |
df7492f9 KH |
5894 | coding->dst_object = dst_object; |
5895 | coding->dst_pos = BUF_PT (XBUFFER (dst_object)); | |
5896 | coding->dst_pos_byte = BUF_PT_BYTE (XBUFFER (dst_object)); | |
5897 | coding->dst_multibyte | |
5898 | = ! NILP (XBUFFER (dst_object)->enable_multibyte_characters); | |
12410ef1 | 5899 | } |
72d1a715 | 5900 | else |
df7492f9 KH |
5901 | { |
5902 | coding->dst_object = Qnil; | |
5903 | coding->dst_multibyte = 1; | |
5904 | } | |
5905 | ||
5906 | decode_coding (coding); | |
4ed46869 | 5907 | |
df7492f9 KH |
5908 | if (BUFFERP (coding->dst_object)) |
5909 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
ec6d2bb8 | 5910 | |
df7492f9 | 5911 | if (! NILP (CODING_ATTR_POST_READ (attrs))) |
d46c5b12 | 5912 | { |
df7492f9 KH |
5913 | struct gcpro gcpro1, gcpro2; |
5914 | EMACS_INT prev_Z = Z, prev_Z_BYTE = Z_BYTE; | |
2b4f9037 | 5915 | Lisp_Object val; |
4ed46869 | 5916 | |
df7492f9 KH |
5917 | GCPRO2 (coding->src_object, coding->dst_object); |
5918 | val = call1 (CODING_ATTR_POST_READ (attrs), | |
5919 | make_number (coding->produced_char)); | |
5920 | UNGCPRO; | |
5921 | CHECK_NATNUM (val); | |
5922 | coding->produced_char += Z - prev_Z; | |
5923 | coding->produced += Z_BYTE - prev_Z_BYTE; | |
d46c5b12 | 5924 | } |
4ed46869 | 5925 | |
df7492f9 | 5926 | if (EQ (dst_object, Qt)) |
ec6d2bb8 | 5927 | { |
df7492f9 KH |
5928 | coding->dst_object = Fbuffer_string (); |
5929 | } | |
5930 | else if (NILP (dst_object) && BUFFERP (coding->dst_object)) | |
5931 | { | |
5932 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
5933 | if (dst_bytes < coding->produced) | |
5934 | { | |
5935 | destination | |
5936 | = (unsigned char *) xrealloc (destination, coding->produced); | |
5937 | if (! destination) | |
5938 | { | |
5939 | coding->result = CODING_RESULT_INSUFFICIENT_DST; | |
5940 | unbind_to (count, Qnil); | |
5941 | return; | |
5942 | } | |
5943 | if (BEGV < GPT && GPT < BEGV + coding->produced_char) | |
5944 | move_gap_both (BEGV, BEGV_BYTE); | |
5945 | bcopy (BEGV_ADDR, destination, coding->produced); | |
5946 | coding->destination = destination; | |
5947 | } | |
ec6d2bb8 | 5948 | } |
2b4f9037 | 5949 | |
df7492f9 | 5950 | unbind_to (count, Qnil); |
d46c5b12 KH |
5951 | } |
5952 | ||
df7492f9 KH |
5953 | |
5954 | void | |
5955 | encode_coding_object (coding, src_object, from, from_byte, to, to_byte, | |
5956 | dst_object) | |
b73bfc1c | 5957 | struct coding_system *coding; |
df7492f9 KH |
5958 | Lisp_Object src_object; |
5959 | EMACS_INT from, from_byte, to, to_byte; | |
5960 | Lisp_Object dst_object; | |
b73bfc1c KH |
5961 | { |
5962 | int count = specpdl_ptr - specpdl; | |
df7492f9 KH |
5963 | EMACS_INT chars = to - from; |
5964 | EMACS_INT bytes = to_byte - from_byte; | |
5965 | Lisp_Object attrs; | |
5966 | ||
5967 | saved_coding = coding; | |
5968 | record_unwind_protect (code_conversion_restore, save_excursion_save ()); | |
5969 | ||
5970 | coding->src_object = src_object; | |
5971 | coding->src_chars = chars; | |
5972 | coding->src_bytes = bytes; | |
5973 | coding->src_multibyte = chars < bytes; | |
5974 | ||
5975 | attrs = CODING_ID_ATTRS (coding->id); | |
5976 | ||
5977 | if (! NILP (CODING_ATTR_PRE_WRITE (attrs))) | |
6bac5b12 | 5978 | { |
df7492f9 | 5979 | Lisp_Object val; |
b73bfc1c | 5980 | |
df7492f9 KH |
5981 | coding->src_object = make_conversion_work_buffer (coding->src_multibyte); |
5982 | set_buffer_internal (XBUFFER (coding->src_object)); | |
5983 | if (STRINGP (src_object)) | |
5984 | insert_from_string (src_object, from, from_byte, chars, bytes, 0); | |
5985 | else if (BUFFERP (src_object)) | |
5986 | insert_from_buffer (XBUFFER (src_object), from, chars, 0); | |
5987 | else | |
5988 | insert_1_both (coding->source + from, chars, bytes, 0, 0, 0); | |
5989 | ||
5990 | if (EQ (src_object, dst_object)) | |
5991 | { | |
5992 | set_buffer_internal (XBUFFER (src_object)); | |
5993 | del_range_both (from, from_byte, to, to_byte, 1); | |
5994 | set_buffer_internal (XBUFFER (coding->src_object)); | |
5995 | } | |
5996 | ||
5997 | val = call2 (CODING_ATTR_PRE_WRITE (attrs), | |
5998 | make_number (1), make_number (chars)); | |
5999 | CHECK_NATNUM (val); | |
6000 | if (BEG != GPT) | |
6001 | move_gap_both (BEG, BEG_BYTE); | |
6002 | coding->src_chars = Z - BEG; | |
6003 | coding->src_bytes = Z_BYTE - BEG_BYTE; | |
6004 | coding->src_pos = BEG; | |
6005 | coding->src_pos_byte = BEG_BYTE; | |
6006 | coding->src_multibyte = Z < Z_BYTE; | |
6007 | } | |
6008 | else if (STRINGP (src_object)) | |
6009 | { | |
6010 | coding->src_pos = from; | |
6011 | coding->src_pos_byte = from_byte; | |
6012 | } | |
6013 | else if (BUFFERP (src_object)) | |
d46c5b12 | 6014 | { |
df7492f9 KH |
6015 | set_buffer_internal (XBUFFER (src_object)); |
6016 | if (from != GPT) | |
6017 | move_gap_both (from, from_byte); | |
6018 | if (EQ (src_object, dst_object)) | |
d46c5b12 | 6019 | { |
df7492f9 KH |
6020 | del_range_both (from, from_byte, to, to_byte, 1); |
6021 | coding->src_pos = -chars; | |
6022 | coding->src_pos_byte = -bytes; | |
d46c5b12 | 6023 | } |
df7492f9 | 6024 | else |
d46c5b12 | 6025 | { |
df7492f9 KH |
6026 | coding->src_pos = from; |
6027 | coding->src_pos_byte = from_byte; | |
d46c5b12 KH |
6028 | } |
6029 | } | |
4ed46869 | 6030 | |
df7492f9 | 6031 | if (BUFFERP (dst_object)) |
d46c5b12 | 6032 | { |
df7492f9 KH |
6033 | coding->dst_object = dst_object; |
6034 | coding->dst_pos = BUF_PT (XBUFFER (dst_object)); | |
6035 | coding->dst_pos_byte = BUF_PT_BYTE (XBUFFER (dst_object)); | |
6036 | coding->dst_multibyte | |
6037 | = ! NILP (XBUFFER (dst_object)->enable_multibyte_characters); | |
b73bfc1c | 6038 | } |
df7492f9 | 6039 | else if (EQ (dst_object, Qt)) |
4956c225 | 6040 | { |
df7492f9 KH |
6041 | coding->dst_object = Qnil; |
6042 | coding->destination = (unsigned char *) xmalloc (coding->src_chars); | |
6043 | coding->dst_bytes = coding->src_chars; | |
6044 | coding->dst_multibyte = 0; | |
4956c225 | 6045 | } |
df7492f9 | 6046 | else |
78108bcd | 6047 | { |
df7492f9 KH |
6048 | coding->dst_object = Qnil; |
6049 | coding->dst_multibyte = 0; | |
78108bcd KH |
6050 | } |
6051 | ||
df7492f9 | 6052 | encode_coding (coding); |
4ed46869 | 6053 | |
df7492f9 | 6054 | if (EQ (dst_object, Qt)) |
4ed46869 | 6055 | { |
df7492f9 KH |
6056 | if (BUFFERP (coding->dst_object)) |
6057 | coding->dst_object = Fbuffer_string (); | |
6058 | else | |
73be902c | 6059 | { |
df7492f9 KH |
6060 | coding->dst_object |
6061 | = make_unibyte_string ((char *) coding->destination, | |
6062 | coding->produced); | |
6063 | xfree (coding->destination); | |
73be902c | 6064 | } |
4ed46869 | 6065 | } |
d46c5b12 | 6066 | |
df7492f9 | 6067 | unbind_to (count, Qnil); |
b73bfc1c KH |
6068 | } |
6069 | ||
df7492f9 | 6070 | |
b73bfc1c | 6071 | Lisp_Object |
df7492f9 | 6072 | preferred_coding_system () |
b73bfc1c | 6073 | { |
df7492f9 | 6074 | int id = coding_categories[coding_priorities[0]].id; |
2391eaa4 | 6075 | |
df7492f9 | 6076 | return CODING_ID_NAME (id); |
4ed46869 KH |
6077 | } |
6078 | ||
6079 | \f | |
6080 | #ifdef emacs | |
1397dc18 | 6081 | /*** 8. Emacs Lisp library functions ***/ |
4ed46869 | 6082 | |
4ed46869 | 6083 | DEFUN ("coding-system-p", Fcoding_system_p, Scoding_system_p, 1, 1, 0, |
48b0f3ae | 6084 | doc: /* Return t if OBJECT is nil or a coding-system. |
df7492f9 | 6085 | See the documentation of `define-coding-system' for information |
48b0f3ae PJ |
6086 | about coding-system objects. */) |
6087 | (obj) | |
4ed46869 KH |
6088 | Lisp_Object obj; |
6089 | { | |
df7492f9 | 6090 | return ((NILP (obj) || CODING_SYSTEM_P (obj)) ? Qt : Qnil); |
4ed46869 KH |
6091 | } |
6092 | ||
9d991de8 RS |
6093 | DEFUN ("read-non-nil-coding-system", Fread_non_nil_coding_system, |
6094 | Sread_non_nil_coding_system, 1, 1, 0, | |
48b0f3ae PJ |
6095 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. */) |
6096 | (prompt) | |
4ed46869 KH |
6097 | Lisp_Object prompt; |
6098 | { | |
e0e989f6 | 6099 | Lisp_Object val; |
9d991de8 RS |
6100 | do |
6101 | { | |
4608c386 KH |
6102 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
6103 | Qt, Qnil, Qcoding_system_history, Qnil, Qnil); | |
9d991de8 RS |
6104 | } |
6105 | while (XSTRING (val)->size == 0); | |
e0e989f6 | 6106 | return (Fintern (val, Qnil)); |
4ed46869 KH |
6107 | } |
6108 | ||
9b787f3e | 6109 | DEFUN ("read-coding-system", Fread_coding_system, Sread_coding_system, 1, 2, 0, |
48b0f3ae PJ |
6110 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. |
6111 | If the user enters null input, return second argument DEFAULT-CODING-SYSTEM. */) | |
6112 | (prompt, default_coding_system) | |
9b787f3e | 6113 | Lisp_Object prompt, default_coding_system; |
4ed46869 | 6114 | { |
f44d27ce | 6115 | Lisp_Object val; |
9b787f3e RS |
6116 | if (SYMBOLP (default_coding_system)) |
6117 | XSETSTRING (default_coding_system, XSYMBOL (default_coding_system)->name); | |
4608c386 | 6118 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
9b787f3e RS |
6119 | Qt, Qnil, Qcoding_system_history, |
6120 | default_coding_system, Qnil); | |
e0e989f6 | 6121 | return (XSTRING (val)->size == 0 ? Qnil : Fintern (val, Qnil)); |
4ed46869 KH |
6122 | } |
6123 | ||
6124 | DEFUN ("check-coding-system", Fcheck_coding_system, Scheck_coding_system, | |
6125 | 1, 1, 0, | |
48b0f3ae PJ |
6126 | doc: /* Check validity of CODING-SYSTEM. |
6127 | If valid, return CODING-SYSTEM, else signal a `coding-system-error' error. | |
6128 | It is valid if it is a symbol with a non-nil `coding-system' property. | |
6129 | The value of property should be a vector of length 5. */) | |
df7492f9 | 6130 | (coding_system) |
4ed46869 KH |
6131 | Lisp_Object coding_system; |
6132 | { | |
b7826503 | 6133 | CHECK_SYMBOL (coding_system); |
4ed46869 KH |
6134 | if (!NILP (Fcoding_system_p (coding_system))) |
6135 | return coding_system; | |
6136 | while (1) | |
02ba4723 | 6137 | Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil)); |
4ed46869 | 6138 | } |
df7492f9 | 6139 | |
3a73fa5d | 6140 | \f |
d46c5b12 | 6141 | Lisp_Object |
df7492f9 | 6142 | detect_coding_system (src, src_bytes, highest, multibytep, coding_system) |
d46c5b12 KH |
6143 | unsigned char *src; |
6144 | int src_bytes, highest; | |
0a28aafb | 6145 | int multibytep; |
df7492f9 | 6146 | Lisp_Object coding_system; |
4ed46869 | 6147 | { |
df7492f9 KH |
6148 | unsigned char *src_end = src + src_bytes; |
6149 | int mask = CATEGORY_MASK_ANY; | |
6150 | int detected = 0; | |
6151 | int c, i; | |
6152 | Lisp_Object attrs, eol_type; | |
6153 | Lisp_Object val; | |
6154 | struct coding_system coding; | |
6155 | ||
6156 | if (NILP (coding_system)) | |
6157 | coding_system = Qundecided; | |
6158 | setup_coding_system (coding_system, &coding); | |
6159 | attrs = CODING_ID_ATTRS (coding.id); | |
6160 | eol_type = CODING_ID_EOL_TYPE (coding.id); | |
4ed46869 | 6161 | |
df7492f9 KH |
6162 | coding.source = src; |
6163 | coding.src_bytes = src_bytes; | |
6164 | coding.src_multibyte = multibytep; | |
6165 | coding.consumed = 0; | |
4ed46869 | 6166 | |
df7492f9 | 6167 | if (XINT (CODING_ATTR_CATEGORY (attrs)) != coding_category_undecided) |
4ed46869 | 6168 | { |
df7492f9 | 6169 | mask = 1 << XINT (CODING_ATTR_CATEGORY (attrs)); |
4ed46869 | 6170 | } |
df7492f9 | 6171 | else |
4ed46869 | 6172 | { |
df7492f9 KH |
6173 | coding_system = Qnil; |
6174 | for (; src < src_end; src++) | |
4ed46869 | 6175 | { |
df7492f9 KH |
6176 | c = *src; |
6177 | if (c & 0x80 || (c < 0x20 && (c == ISO_CODE_ESC | |
6178 | || c == ISO_CODE_SI | |
6179 | || c == ISO_CODE_SO))) | |
d46c5b12 | 6180 | break; |
4ed46869 | 6181 | } |
df7492f9 KH |
6182 | coding.head_ascii = src - coding.source; |
6183 | ||
6184 | if (src < src_end) | |
6185 | for (i = 0; i < coding_category_raw_text; i++) | |
6186 | { | |
6187 | enum coding_category category = coding_priorities[i]; | |
6188 | struct coding_system *this = coding_categories + category; | |
6189 | ||
6190 | if (category >= coding_category_raw_text | |
6191 | || detected & (1 << category)) | |
6192 | continue; | |
6193 | ||
6194 | if (this->id < 0) | |
6195 | { | |
6196 | /* No coding system of this category is defined. */ | |
6197 | mask &= ~(1 << category); | |
6198 | } | |
6199 | else | |
6200 | { | |
6201 | detected |= detected_mask[category]; | |
6202 | if ((*(coding_categories[category].detector)) (&coding, &mask) | |
6203 | && highest) | |
6204 | { | |
6205 | mask &= detected_mask[category]; | |
6206 | break; | |
6207 | } | |
6208 | } | |
6209 | } | |
4ed46869 | 6210 | } |
4ed46869 | 6211 | |
df7492f9 KH |
6212 | if (!mask) |
6213 | val = Fcons (make_number (coding_category_raw_text), Qnil); | |
6214 | else if (mask == CATEGORY_MASK_ANY) | |
6215 | val = Fcons (make_number (coding_category_undecided), Qnil); | |
6216 | else if (highest) | |
4ed46869 | 6217 | { |
df7492f9 KH |
6218 | for (i = 0; i < coding_category_raw_text; i++) |
6219 | if (mask & (1 << coding_priorities[i])) | |
6220 | { | |
6221 | val = Fcons (make_number (coding_priorities[i]), Qnil); | |
6222 | break; | |
6223 | } | |
6224 | } | |
6225 | else | |
6226 | { | |
6227 | val = Qnil; | |
6228 | for (i = coding_category_raw_text - 1; i >= 0; i--) | |
6229 | if (mask & (1 << coding_priorities[i])) | |
6230 | val = Fcons (make_number (coding_priorities[i]), val); | |
4ed46869 | 6231 | } |
df7492f9 KH |
6232 | |
6233 | { | |
6234 | int one_byte_eol = -1, two_byte_eol = -1; | |
6235 | Lisp_Object tail; | |
6236 | ||
6237 | for (tail = val; CONSP (tail); tail = XCDR (tail)) | |
6238 | { | |
6239 | struct coding_system *this | |
6240 | = (NILP (coding_system) ? coding_categories + XINT (XCAR (tail)) | |
6241 | : &coding); | |
6242 | int this_eol; | |
6243 | ||
6244 | attrs = CODING_ID_ATTRS (this->id); | |
6245 | eol_type = CODING_ID_EOL_TYPE (this->id); | |
6246 | XSETCAR (tail, CODING_ID_NAME (this->id)); | |
6247 | if (VECTORP (eol_type)) | |
6248 | { | |
6249 | if (EQ (CODING_ATTR_TYPE (attrs), Qutf_16)) | |
6250 | { | |
6251 | if (two_byte_eol < 0) | |
6252 | two_byte_eol = detect_eol (this, coding.source, src_bytes); | |
6253 | this_eol = two_byte_eol; | |
6254 | } | |
6255 | else | |
6256 | { | |
6257 | if (one_byte_eol < 0) | |
6258 | one_byte_eol =detect_eol (this, coding.source, src_bytes); | |
6259 | this_eol = one_byte_eol; | |
6260 | } | |
6261 | if (this_eol == EOL_SEEN_LF) | |
6262 | XSETCAR (tail, AREF (eol_type, 0)); | |
6263 | else if (this_eol == EOL_SEEN_CRLF) | |
6264 | XSETCAR (tail, AREF (eol_type, 1)); | |
6265 | else if (this_eol == EOL_SEEN_CR) | |
6266 | XSETCAR (tail, AREF (eol_type, 2)); | |
6267 | } | |
6268 | } | |
6269 | } | |
6270 | ||
03699b14 | 6271 | return (highest ? XCAR (val) : val); |
93dec019 | 6272 | } |
4ed46869 | 6273 | |
df7492f9 | 6274 | |
d46c5b12 KH |
6275 | DEFUN ("detect-coding-region", Fdetect_coding_region, Sdetect_coding_region, |
6276 | 2, 3, 0, | |
48b0f3ae PJ |
6277 | doc: /* Detect coding system of the text in the region between START and END. |
6278 | Return a list of possible coding systems ordered by priority. | |
6279 | ||
6280 | If only ASCII characters are found, it returns a list of single element | |
6281 | `undecided' or its subsidiary coding system according to a detected | |
6282 | end-of-line format. | |
6283 | ||
6284 | If optional argument HIGHEST is non-nil, return the coding system of | |
6285 | highest priority. */) | |
6286 | (start, end, highest) | |
d46c5b12 KH |
6287 | Lisp_Object start, end, highest; |
6288 | { | |
6289 | int from, to; | |
6290 | int from_byte, to_byte; | |
6289dd10 | 6291 | |
b7826503 PJ |
6292 | CHECK_NUMBER_COERCE_MARKER (start); |
6293 | CHECK_NUMBER_COERCE_MARKER (end); | |
4ed46869 | 6294 | |
d46c5b12 KH |
6295 | validate_region (&start, &end); |
6296 | from = XINT (start), to = XINT (end); | |
6297 | from_byte = CHAR_TO_BYTE (from); | |
6298 | to_byte = CHAR_TO_BYTE (to); | |
6289dd10 | 6299 | |
d46c5b12 KH |
6300 | if (from < GPT && to >= GPT) |
6301 | move_gap_both (to, to_byte); | |
c210f766 | 6302 | |
d46c5b12 | 6303 | return detect_coding_system (BYTE_POS_ADDR (from_byte), |
df7492f9 | 6304 | to_byte - from_byte, |
0a28aafb KH |
6305 | !NILP (highest), |
6306 | !NILP (current_buffer | |
df7492f9 KH |
6307 | ->enable_multibyte_characters), |
6308 | Qnil); | |
d46c5b12 | 6309 | } |
6289dd10 | 6310 | |
d46c5b12 KH |
6311 | DEFUN ("detect-coding-string", Fdetect_coding_string, Sdetect_coding_string, |
6312 | 1, 2, 0, | |
48b0f3ae PJ |
6313 | doc: /* Detect coding system of the text in STRING. |
6314 | Return a list of possible coding systems ordered by priority. | |
6315 | ||
6316 | If only ASCII characters are found, it returns a list of single element | |
6317 | `undecided' or its subsidiary coding system according to a detected | |
6318 | end-of-line format. | |
6319 | ||
6320 | If optional argument HIGHEST is non-nil, return the coding system of | |
6321 | highest priority. */) | |
6322 | (string, highest) | |
d46c5b12 KH |
6323 | Lisp_Object string, highest; |
6324 | { | |
b7826503 | 6325 | CHECK_STRING (string); |
4ed46869 | 6326 | |
d46c5b12 | 6327 | return detect_coding_system (XSTRING (string)->data, |
df7492f9 | 6328 | STRING_BYTES (XSTRING (string)), |
0a28aafb | 6329 | !NILP (highest), |
df7492f9 KH |
6330 | STRING_MULTIBYTE (string), |
6331 | Qnil); | |
4ed46869 KH |
6332 | } |
6333 | ||
05e6f5dc | 6334 | |
df7492f9 KH |
6335 | static INLINE int |
6336 | char_encodable_p (c, attrs) | |
6337 | int c; | |
6338 | Lisp_Object attrs; | |
05e6f5dc | 6339 | { |
df7492f9 | 6340 | Lisp_Object tail; |
df7492f9 | 6341 | struct charset *charset; |
05e6f5dc | 6342 | |
df7492f9 KH |
6343 | for (tail = CODING_ATTR_CHARSET_LIST (attrs); |
6344 | CONSP (tail); tail = XCDR (tail)) | |
05e6f5dc | 6345 | { |
df7492f9 KH |
6346 | charset = CHARSET_FROM_ID (XINT (XCAR (tail))); |
6347 | if (CHAR_CHARSET_P (c, charset)) | |
6348 | break; | |
05e6f5dc | 6349 | } |
df7492f9 | 6350 | return (! NILP (tail)); |
05e6f5dc KH |
6351 | } |
6352 | ||
6353 | ||
df7492f9 KH |
6354 | /* Return a list of coding systems that safely encode the text between |
6355 | START and END. If EXCLUDE is non-nil, it is a list of coding | |
6356 | systems not to check. The returned list doesn't contain any such | |
6357 | coding systems. In any case, If the text contains only ASCII or is | |
6358 | unibyte, return t. */ | |
6359 | ||
6360 | DEFUN ("find-coding-systems-region-internal", | |
6361 | Ffind_coding_systems_region_internal, | |
6362 | Sfind_coding_systems_region_internal, 2, 3, 0, | |
6363 | doc: /* Internal use only. */) | |
6364 | (start, end, exclude) | |
6365 | Lisp_Object start, end, exclude; | |
6366 | { | |
6367 | Lisp_Object coding_attrs_list, safe_codings; | |
6368 | EMACS_INT start_byte, end_byte; | |
6369 | unsigned char *p, *pbeg, *pend; | |
6370 | int c; | |
6371 | Lisp_Object tail, elt; | |
05e6f5dc | 6372 | |
df7492f9 KH |
6373 | if (STRINGP (start)) |
6374 | { | |
6375 | if (!STRING_MULTIBYTE (start) | |
6376 | && XSTRING (start)->size != STRING_BYTES (XSTRING (start))) | |
6377 | return Qt; | |
6378 | start_byte = 0; | |
6379 | end_byte = STRING_BYTES (XSTRING (start)); | |
6380 | } | |
6381 | else | |
6382 | { | |
6383 | CHECK_NUMBER_COERCE_MARKER (start); | |
6384 | CHECK_NUMBER_COERCE_MARKER (end); | |
6385 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) | |
6386 | args_out_of_range (start, end); | |
6387 | if (NILP (current_buffer->enable_multibyte_characters)) | |
6388 | return Qt; | |
6389 | start_byte = CHAR_TO_BYTE (XINT (start)); | |
6390 | end_byte = CHAR_TO_BYTE (XINT (end)); | |
6391 | if (XINT (end) - XINT (start) == end_byte - start_byte) | |
6392 | return Qt; | |
05e6f5dc | 6393 | |
df7492f9 KH |
6394 | if (start < GPT && end > GPT) |
6395 | { | |
6396 | if ((GPT - start) < (end - GPT)) | |
6397 | move_gap_both (start, start_byte); | |
6398 | else | |
6399 | move_gap_both (end, end_byte); | |
6400 | } | |
6401 | } | |
05e6f5dc | 6402 | |
df7492f9 KH |
6403 | coding_attrs_list = Qnil; |
6404 | for (tail = Vcoding_system_list; CONSP (tail); tail = XCDR (tail)) | |
6405 | if (NILP (exclude) | |
6406 | || NILP (Fmemq (XCAR (tail), exclude))) | |
6407 | { | |
6408 | Lisp_Object attrs; | |
05e6f5dc | 6409 | |
df7492f9 KH |
6410 | attrs = AREF (CODING_SYSTEM_SPEC (XCAR (tail)), 0); |
6411 | if (EQ (XCAR (tail), CODING_ATTR_BASE_NAME (attrs)) | |
6412 | && ! EQ (CODING_ATTR_TYPE (attrs), Qundecided)) | |
6413 | coding_attrs_list = Fcons (attrs, coding_attrs_list); | |
6414 | } | |
6415 | ||
6416 | if (STRINGP (start)) | |
6417 | p = pbeg = XSTRING (start)->data; | |
6418 | else | |
6419 | p = pbeg = BYTE_POS_ADDR (start_byte); | |
6420 | pend = p + (end_byte - start_byte); | |
6421 | ||
6422 | while (p < pend && ASCII_BYTE_P (*p)) p++; | |
6423 | while (p < pend && ASCII_BYTE_P (*(pend - 1))) pend--; | |
05e6f5dc KH |
6424 | |
6425 | while (p < pend) | |
6426 | { | |
df7492f9 KH |
6427 | if (ASCII_BYTE_P (*p)) |
6428 | p++; | |
6429 | else | |
6430 | { | |
6431 | c = STRING_CHAR_ADVANCE (p); | |
6432 | ||
6433 | charset_map_loaded = 0; | |
6434 | for (tail = coding_attrs_list; CONSP (tail);) | |
6435 | { | |
6436 | elt = XCAR (tail); | |
6437 | if (NILP (elt)) | |
6438 | tail = XCDR (tail); | |
6439 | else if (char_encodable_p (c, elt)) | |
6440 | tail = XCDR (tail); | |
6441 | else if (CONSP (XCDR (tail))) | |
6442 | { | |
6443 | XSETCAR (tail, XCAR (XCDR (tail))); | |
6444 | XSETCDR (tail, XCDR (XCDR (tail))); | |
6445 | } | |
6446 | else | |
6447 | { | |
6448 | XSETCAR (tail, Qnil); | |
6449 | tail = XCDR (tail); | |
6450 | } | |
6451 | } | |
6452 | if (charset_map_loaded) | |
6453 | { | |
6454 | EMACS_INT p_offset = p - pbeg, pend_offset = pend - pbeg; | |
05e6f5dc | 6455 | |
df7492f9 KH |
6456 | if (STRINGP (start)) |
6457 | pbeg = XSTRING (start)->data; | |
6458 | else | |
6459 | pbeg = BYTE_POS_ADDR (start_byte); | |
6460 | p = pbeg + p_offset; | |
6461 | pend = pbeg + pend_offset; | |
6462 | } | |
6463 | } | |
05e6f5dc | 6464 | } |
df7492f9 KH |
6465 | |
6466 | safe_codings = Qnil; | |
6467 | for (tail = coding_attrs_list; CONSP (tail); tail = XCDR (tail)) | |
6468 | if (! NILP (XCAR (tail))) | |
6469 | safe_codings = Fcons (CODING_ATTR_BASE_NAME (XCAR (tail)), safe_codings); | |
6470 | ||
05e6f5dc KH |
6471 | return safe_codings; |
6472 | } | |
6473 | ||
6474 | ||
df7492f9 KH |
6475 | DEFUN ("check-coding-systems-region", Fcheck_coding_systems_region, |
6476 | Scheck_coding_systems_region, 3, 3, 0, | |
6477 | doc: /* Check if the region is encodable by coding systems. | |
05e6f5dc | 6478 | |
df7492f9 KH |
6479 | START and END are buffer positions specifying the region. |
6480 | CODING-SYSTEM-LIST is a list of coding systems to check. | |
6481 | ||
6482 | The value is an alist ((CODING-SYSTEM POS0 POS1 ...) ...), where | |
6483 | CODING-SYSTEM is a member of CODING-SYSTEM-LIst and can't encode the | |
6484 | whole region, POS0, POS1, ... are buffer positions where non-encodable | |
6485 | characters are found. | |
6486 | ||
6487 | If all coding systems in CODING-SYSTEM-LIST can encode the region, the | |
6488 | value is nil. | |
6489 | ||
6490 | START may be a string. In that case, check if the string is | |
6491 | encodable, and the value contains indices to the string instead of | |
6492 | buffer positions. END is ignored. */) | |
6493 | (start, end, coding_system_list) | |
6494 | Lisp_Object start, end, coding_system_list; | |
05e6f5dc | 6495 | { |
df7492f9 KH |
6496 | Lisp_Object list; |
6497 | EMACS_INT start_byte, end_byte; | |
6498 | int pos; | |
6499 | unsigned char *p, *pbeg, *pend; | |
6500 | int c; | |
6501 | Lisp_Object tail, elt; | |
05e6f5dc KH |
6502 | |
6503 | if (STRINGP (start)) | |
6504 | { | |
df7492f9 KH |
6505 | if (!STRING_MULTIBYTE (start) |
6506 | && XSTRING (start)->size != STRING_BYTES (XSTRING (start))) | |
6507 | return Qnil; | |
6508 | start_byte = 0; | |
6509 | end_byte = STRING_BYTES (XSTRING (start)); | |
6510 | pos = 0; | |
05e6f5dc KH |
6511 | } |
6512 | else | |
6513 | { | |
b7826503 PJ |
6514 | CHECK_NUMBER_COERCE_MARKER (start); |
6515 | CHECK_NUMBER_COERCE_MARKER (end); | |
05e6f5dc KH |
6516 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) |
6517 | args_out_of_range (start, end); | |
6518 | if (NILP (current_buffer->enable_multibyte_characters)) | |
df7492f9 KH |
6519 | return Qnil; |
6520 | start_byte = CHAR_TO_BYTE (XINT (start)); | |
6521 | end_byte = CHAR_TO_BYTE (XINT (end)); | |
6522 | if (XINT (end) - XINT (start) == end_byte - start_byte) | |
05e6f5dc | 6523 | return Qt; |
df7492f9 KH |
6524 | |
6525 | if (start < GPT && end > GPT) | |
6526 | { | |
6527 | if ((GPT - start) < (end - GPT)) | |
6528 | move_gap_both (start, start_byte); | |
6529 | else | |
6530 | move_gap_both (end, end_byte); | |
6531 | } | |
6532 | pos = start; | |
6533 | } | |
6534 | ||
6535 | list = Qnil; | |
6536 | for (tail = coding_system_list; CONSP (tail); tail = XCDR (tail)) | |
6537 | { | |
6538 | elt = XCAR (tail); | |
6539 | list = Fcons (Fcons (elt, Fcons (AREF (CODING_SYSTEM_SPEC (elt), 0), | |
6540 | Qnil)), | |
6541 | list); | |
05e6f5dc KH |
6542 | } |
6543 | ||
df7492f9 KH |
6544 | if (STRINGP (start)) |
6545 | p = pbeg = XSTRING (start)->data; | |
6546 | else | |
6547 | p = pbeg = BYTE_POS_ADDR (start_byte); | |
6548 | pend = p + (end_byte - start_byte); | |
6549 | ||
6550 | while (p < pend && ASCII_BYTE_P (*p)) p++, pos++; | |
6551 | while (p < pend && ASCII_BYTE_P (*(pend - 1))) pend--; | |
6552 | ||
6553 | while (p < pend) | |
05e6f5dc | 6554 | { |
df7492f9 KH |
6555 | if (ASCII_BYTE_P (*p)) |
6556 | p++; | |
6557 | else | |
05e6f5dc | 6558 | { |
df7492f9 KH |
6559 | c = STRING_CHAR_ADVANCE (p); |
6560 | ||
6561 | charset_map_loaded = 0; | |
6562 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
6563 | { | |
6564 | elt = XCDR (XCAR (tail)); | |
6565 | if (! char_encodable_p (c, XCAR (elt))) | |
6566 | XSETCDR (elt, Fcons (make_number (pos), XCDR (elt))); | |
6567 | } | |
6568 | if (charset_map_loaded) | |
6569 | { | |
6570 | EMACS_INT p_offset = p - pbeg, pend_offset = pend - pbeg; | |
6571 | ||
6572 | if (STRINGP (start)) | |
6573 | pbeg = XSTRING (start)->data; | |
6574 | else | |
6575 | pbeg = BYTE_POS_ADDR (start_byte); | |
6576 | p = pbeg + p_offset; | |
6577 | pend = pbeg + pend_offset; | |
6578 | } | |
05e6f5dc | 6579 | } |
df7492f9 | 6580 | pos++; |
05e6f5dc KH |
6581 | } |
6582 | ||
df7492f9 KH |
6583 | tail = list; |
6584 | list = Qnil; | |
6585 | for (; CONSP (tail); tail = XCDR (tail)) | |
05e6f5dc | 6586 | { |
df7492f9 KH |
6587 | elt = XCAR (tail); |
6588 | if (CONSP (XCDR (XCDR (elt)))) | |
6589 | list = Fcons (Fcons (XCAR (elt), Fnreverse (XCDR (XCDR (elt)))), | |
6590 | list); | |
05e6f5dc | 6591 | } |
df7492f9 KH |
6592 | |
6593 | return list; | |
05e6f5dc KH |
6594 | } |
6595 | ||
6596 | ||
df7492f9 | 6597 | |
4031e2bf | 6598 | Lisp_Object |
df7492f9 KH |
6599 | code_convert_region (start, end, coding_system, dst_object, encodep, norecord) |
6600 | Lisp_Object start, end, coding_system, dst_object; | |
6601 | int encodep, norecord; | |
3a73fa5d RS |
6602 | { |
6603 | struct coding_system coding; | |
df7492f9 KH |
6604 | EMACS_INT from, from_byte, to, to_byte; |
6605 | Lisp_Object src_object; | |
3a73fa5d | 6606 | |
b7826503 PJ |
6607 | CHECK_NUMBER_COERCE_MARKER (start); |
6608 | CHECK_NUMBER_COERCE_MARKER (end); | |
df7492f9 KH |
6609 | if (NILP (coding_system)) |
6610 | coding_system = Qno_conversion; | |
6611 | else | |
6612 | CHECK_CODING_SYSTEM (coding_system); | |
6613 | src_object = Fcurrent_buffer (); | |
6614 | if (NILP (dst_object)) | |
6615 | dst_object = src_object; | |
6616 | else if (! EQ (dst_object, Qt)) | |
6617 | CHECK_BUFFER (dst_object); | |
3a73fa5d | 6618 | |
d46c5b12 KH |
6619 | validate_region (&start, &end); |
6620 | from = XFASTINT (start); | |
df7492f9 | 6621 | from_byte = CHAR_TO_BYTE (from); |
d46c5b12 | 6622 | to = XFASTINT (end); |
df7492f9 | 6623 | to_byte = CHAR_TO_BYTE (to); |
d46c5b12 | 6624 | |
df7492f9 KH |
6625 | setup_coding_system (coding_system, &coding); |
6626 | coding.mode |= CODING_MODE_LAST_BLOCK; | |
6627 | ||
6628 | if (encodep) | |
6629 | encode_coding_object (&coding, src_object, from, from_byte, to, to_byte, | |
6630 | dst_object); | |
6631 | else | |
6632 | decode_coding_object (&coding, src_object, from, from_byte, to, to_byte, | |
6633 | dst_object); | |
6634 | if (! norecord) | |
6635 | Vlast_coding_system_used = CODING_ID_NAME (coding.id); | |
d46c5b12 | 6636 | |
df7492f9 KH |
6637 | if (coding.result != CODING_RESULT_SUCCESS) |
6638 | error ("Code conversion error: %d", coding.result); | |
3a73fa5d | 6639 | |
df7492f9 KH |
6640 | return (BUFFERP (dst_object) |
6641 | ? make_number (coding.produced_char) | |
6642 | : coding.dst_object); | |
4031e2bf KH |
6643 | } |
6644 | ||
df7492f9 | 6645 | |
4031e2bf | 6646 | DEFUN ("decode-coding-region", Fdecode_coding_region, Sdecode_coding_region, |
df7492f9 | 6647 | 3, 4, "r\nzCoding system: ", |
48b0f3ae | 6648 | doc: /* Decode the current region from the specified coding system. |
df7492f9 KH |
6649 | When called from a program, takes four arguments: |
6650 | START, END, CODING-SYSTEM, and DESTINATION. | |
6651 | START and END are buffer positions. | |
6652 | ||
6653 | Optional 4th arguments DESTINATION specifies where the decoded text goes. | |
6654 | If nil, the region between START and END is replace by the decoded text. | |
6655 | If buffer, the decoded text is inserted in the buffer. | |
6656 | If t, the decoded text is returned. | |
6657 | ||
48b0f3ae PJ |
6658 | This function sets `last-coding-system-used' to the precise coding system |
6659 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6660 | not fully specified.) | |
6661 | It returns the length of the decoded text. */) | |
df7492f9 KH |
6662 | (start, end, coding_system, destination) |
6663 | Lisp_Object start, end, coding_system, destination; | |
4031e2bf | 6664 | { |
df7492f9 | 6665 | return code_convert_region (start, end, coding_system, destination, 0, 0); |
3a73fa5d RS |
6666 | } |
6667 | ||
6668 | DEFUN ("encode-coding-region", Fencode_coding_region, Sencode_coding_region, | |
df7492f9 KH |
6669 | 3, 4, "r\nzCoding system: ", |
6670 | doc: /* Encode the current region by specified coding system. | |
48b0f3ae PJ |
6671 | When called from a program, takes three arguments: |
6672 | START, END, and CODING-SYSTEM. START and END are buffer positions. | |
df7492f9 KH |
6673 | |
6674 | Optional 4th arguments DESTINATION specifies where the encoded text goes. | |
6675 | If nil, the region between START and END is replace by the encoded text. | |
6676 | If buffer, the encoded text is inserted in the buffer. | |
6677 | If t, the encoded text is returned. | |
6678 | ||
48b0f3ae PJ |
6679 | This function sets `last-coding-system-used' to the precise coding system |
6680 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6681 | not fully specified.) | |
6682 | It returns the length of the encoded text. */) | |
df7492f9 KH |
6683 | (start, end, coding_system, destination) |
6684 | Lisp_Object start, end, coding_system, destination; | |
3a73fa5d | 6685 | { |
df7492f9 | 6686 | return code_convert_region (start, end, coding_system, destination, 1, 0); |
4031e2bf | 6687 | } |
3a73fa5d | 6688 | |
4031e2bf | 6689 | Lisp_Object |
df7492f9 KH |
6690 | code_convert_string (string, coding_system, dst_object, |
6691 | encodep, nocopy, norecord) | |
6692 | Lisp_Object string, coding_system, dst_object; | |
6693 | int encodep, nocopy, norecord; | |
4031e2bf KH |
6694 | { |
6695 | struct coding_system coding; | |
df7492f9 | 6696 | EMACS_INT chars, bytes; |
3a73fa5d | 6697 | |
b7826503 | 6698 | CHECK_STRING (string); |
d46c5b12 | 6699 | if (NILP (coding_system)) |
df7492f9 KH |
6700 | { |
6701 | if (! norecord) | |
6702 | Vlast_coding_system_used = Qno_conversion; | |
6703 | if (NILP (dst_object)) | |
6704 | return (nocopy ? Fcopy_sequence (string) : string); | |
6705 | } | |
4ed46869 | 6706 | |
df7492f9 KH |
6707 | if (NILP (coding_system)) |
6708 | coding_system = Qno_conversion; | |
6709 | else | |
6710 | CHECK_CODING_SYSTEM (coding_system); | |
6711 | if (NILP (dst_object)) | |
6712 | dst_object = Qt; | |
6713 | else if (! EQ (dst_object, Qt)) | |
6714 | CHECK_BUFFER (dst_object); | |
5f1cd180 | 6715 | |
df7492f9 | 6716 | setup_coding_system (coding_system, &coding); |
d46c5b12 | 6717 | coding.mode |= CODING_MODE_LAST_BLOCK; |
df7492f9 KH |
6718 | chars = XSTRING (string)->size; |
6719 | bytes = STRING_BYTES (XSTRING (string)); | |
6720 | if (encodep) | |
6721 | encode_coding_object (&coding, string, 0, 0, chars, bytes, dst_object); | |
6722 | else | |
6723 | decode_coding_object (&coding, string, 0, 0, chars, bytes, dst_object); | |
6724 | if (! norecord) | |
6725 | Vlast_coding_system_used = CODING_ID_NAME (coding.id); | |
ec6d2bb8 | 6726 | |
df7492f9 KH |
6727 | if (coding.result != CODING_RESULT_SUCCESS) |
6728 | error ("Code conversion error: %d", coding.result); | |
4ed46869 | 6729 | |
df7492f9 KH |
6730 | return (BUFFERP (dst_object) |
6731 | ? make_number (coding.produced_char) | |
6732 | : coding.dst_object); | |
4ed46869 KH |
6733 | } |
6734 | ||
4031e2bf | 6735 | |
ecec61c1 | 6736 | /* Encode or decode STRING according to CODING_SYSTEM. |
ec6d2bb8 KH |
6737 | Do not set Vlast_coding_system_used. |
6738 | ||
6739 | This function is called only from macros DECODE_FILE and | |
6740 | ENCODE_FILE, thus we ignore character composition. */ | |
ecec61c1 KH |
6741 | |
6742 | Lisp_Object | |
6743 | code_convert_string_norecord (string, coding_system, encodep) | |
6744 | Lisp_Object string, coding_system; | |
6745 | int encodep; | |
6746 | { | |
0be8721c | 6747 | return code_convert_string (string, coding_system, Qt, encodep, 0, 1); |
df7492f9 | 6748 | } |
ecec61c1 | 6749 | |
ecec61c1 | 6750 | |
df7492f9 KH |
6751 | DEFUN ("decode-coding-string", Fdecode_coding_string, Sdecode_coding_string, |
6752 | 2, 4, 0, | |
6753 | doc: /* Decode STRING which is encoded in CODING-SYSTEM, and return the result. | |
6754 | ||
6755 | Optional third arg NOCOPY non-nil means it is OK to return STRING itself | |
6756 | if the decoding operation is trivial. | |
ecec61c1 | 6757 | |
df7492f9 KH |
6758 | Optional fourth arg BUFFER non-nil meant that the decoded text is |
6759 | inserted in BUFFER instead of returned as a astring. In this case, | |
6760 | the return value is BUFFER. | |
ecec61c1 | 6761 | |
df7492f9 KH |
6762 | This function sets `last-coding-system-used' to the precise coding system |
6763 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6764 | not fully specified. */) | |
6765 | (string, coding_system, nocopy, buffer) | |
6766 | Lisp_Object string, coding_system, nocopy, buffer; | |
6767 | { | |
6768 | return code_convert_string (string, coding_system, buffer, | |
6769 | 0, ! NILP (nocopy), 0); | |
6770 | } | |
6771 | ||
6772 | DEFUN ("encode-coding-string", Fencode_coding_string, Sencode_coding_string, | |
6773 | 2, 4, 0, | |
6774 | doc: /* Encode STRING to CODING-SYSTEM, and return the result. | |
6775 | ||
6776 | Optional third arg NOCOPY non-nil means it is OK to return STRING | |
6777 | itself if the encoding operation is trivial. | |
6778 | ||
6779 | Optional fourth arg BUFFER non-nil meant that the encoded text is | |
6780 | inserted in BUFFER instead of returned as a astring. In this case, | |
6781 | the return value is BUFFER. | |
6782 | ||
6783 | This function sets `last-coding-system-used' to the precise coding system | |
6784 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6785 | not fully specified.) */) | |
6786 | (string, coding_system, nocopy, buffer) | |
6787 | Lisp_Object string, coding_system, nocopy, buffer; | |
6788 | { | |
6789 | return code_convert_string (string, coding_system, buffer, | |
6790 | nocopy, ! NILP (nocopy), 1); | |
ecec61c1 | 6791 | } |
df7492f9 | 6792 | |
3a73fa5d | 6793 | \f |
4ed46869 | 6794 | DEFUN ("decode-sjis-char", Fdecode_sjis_char, Sdecode_sjis_char, 1, 1, 0, |
48b0f3ae PJ |
6795 | doc: /* Decode a Japanese character which has CODE in shift_jis encoding. |
6796 | Return the corresponding character. */) | |
6797 | (code) | |
4ed46869 KH |
6798 | Lisp_Object code; |
6799 | { | |
df7492f9 KH |
6800 | Lisp_Object spec, attrs, val; |
6801 | struct charset *charset_roman, *charset_kanji, *charset_kana, *charset; | |
6802 | int c; | |
6803 | ||
6804 | CHECK_NATNUM (code); | |
6805 | c = XFASTINT (code); | |
6806 | CHECK_CODING_SYSTEM_GET_SPEC (Vsjis_coding_system, spec); | |
6807 | attrs = AREF (spec, 0); | |
4ed46869 | 6808 | |
df7492f9 KH |
6809 | if (ASCII_BYTE_P (c) |
6810 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
6811 | return code; | |
6812 | ||
6813 | val = CODING_ATTR_CHARSET_LIST (attrs); | |
6814 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
6815 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
6816 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))); | |
6817 | ||
6818 | if (c <= 0x7F) | |
6819 | charset = charset_roman; | |
6820 | else if (c >= 0xA0 && c < 0xDF) | |
55ab7be3 | 6821 | { |
df7492f9 KH |
6822 | charset = charset_kana; |
6823 | c -= 0x80; | |
55ab7be3 KH |
6824 | } |
6825 | else | |
6826 | { | |
df7492f9 KH |
6827 | int s1 = c >> 8, s2 = c & 0x7F; |
6828 | ||
6829 | if (s1 < 0x81 || (s1 > 0x9F && s1 < 0xE0) || s1 > 0xEF | |
6830 | || s2 < 0x40 || s2 == 0x7F || s2 > 0xFC) | |
6831 | error ("Invalid code: %d", code); | |
6832 | SJIS_TO_JIS (c); | |
6833 | charset = charset_kanji; | |
55ab7be3 | 6834 | } |
df7492f9 KH |
6835 | c = DECODE_CHAR (charset, c); |
6836 | if (c < 0) | |
6837 | error ("Invalid code: %d", code); | |
6838 | return make_number (c); | |
4ed46869 KH |
6839 | } |
6840 | ||
df7492f9 | 6841 | |
4ed46869 | 6842 | DEFUN ("encode-sjis-char", Fencode_sjis_char, Sencode_sjis_char, 1, 1, 0, |
48b0f3ae PJ |
6843 | doc: /* Encode a Japanese character CHAR to shift_jis encoding. |
6844 | Return the corresponding code in SJIS. */) | |
6845 | (ch) | |
df7492f9 | 6846 | Lisp_Object ch; |
4ed46869 | 6847 | { |
df7492f9 KH |
6848 | Lisp_Object spec, attrs, charset_list; |
6849 | int c; | |
6850 | struct charset *charset; | |
6851 | unsigned code; | |
4ed46869 | 6852 | |
df7492f9 KH |
6853 | CHECK_CHARACTER (ch); |
6854 | c = XFASTINT (ch); | |
6855 | CHECK_CODING_SYSTEM_GET_SPEC (Vsjis_coding_system, spec); | |
6856 | attrs = AREF (spec, 0); | |
6857 | ||
6858 | if (ASCII_CHAR_P (c) | |
6859 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
6860 | return ch; | |
6861 | ||
6862 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
6863 | charset = char_charset (c, charset_list, &code); | |
6864 | if (code == CHARSET_INVALID_CODE (charset)) | |
6865 | error ("Can't encode by shift_jis encoding: %d", c); | |
6866 | JIS_TO_SJIS (code); | |
6867 | ||
6868 | return make_number (code); | |
4ed46869 KH |
6869 | } |
6870 | ||
6871 | DEFUN ("decode-big5-char", Fdecode_big5_char, Sdecode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
6872 | doc: /* Decode a Big5 character which has CODE in BIG5 coding system. |
6873 | Return the corresponding character. */) | |
6874 | (code) | |
4ed46869 KH |
6875 | Lisp_Object code; |
6876 | { | |
df7492f9 KH |
6877 | Lisp_Object spec, attrs, val; |
6878 | struct charset *charset_roman, *charset_big5, *charset; | |
6879 | int c; | |
4ed46869 | 6880 | |
df7492f9 KH |
6881 | CHECK_NATNUM (code); |
6882 | c = XFASTINT (code); | |
6883 | CHECK_CODING_SYSTEM_GET_SPEC (Vbig5_coding_system, spec); | |
6884 | attrs = AREF (spec, 0); | |
6885 | ||
6886 | if (ASCII_BYTE_P (c) | |
6887 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
6888 | return code; | |
6889 | ||
6890 | val = CODING_ATTR_CHARSET_LIST (attrs); | |
6891 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
6892 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
6893 | ||
6894 | if (c <= 0x7F) | |
6895 | charset = charset_roman; | |
c28a9453 KH |
6896 | else |
6897 | { | |
df7492f9 KH |
6898 | int b1 = c >> 8, b2 = c & 0x7F; |
6899 | if (b1 < 0xA1 || b1 > 0xFE | |
6900 | || b2 < 0x40 || (b2 > 0x7E && b2 < 0xA1) || b2 > 0xFE) | |
6901 | error ("Invalid code: %d", code); | |
6902 | charset = charset_big5; | |
c28a9453 | 6903 | } |
df7492f9 KH |
6904 | c = DECODE_CHAR (charset, (unsigned )c); |
6905 | if (c < 0) | |
6906 | error ("Invalid code: %d", code); | |
6907 | return make_number (c); | |
4ed46869 KH |
6908 | } |
6909 | ||
6910 | DEFUN ("encode-big5-char", Fencode_big5_char, Sencode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
6911 | doc: /* Encode the Big5 character CHAR to BIG5 coding system. |
6912 | Return the corresponding character code in Big5. */) | |
6913 | (ch) | |
4ed46869 KH |
6914 | Lisp_Object ch; |
6915 | { | |
df7492f9 KH |
6916 | Lisp_Object spec, attrs, charset_list; |
6917 | struct charset *charset; | |
6918 | int c; | |
6919 | unsigned code; | |
6920 | ||
6921 | CHECK_CHARACTER (ch); | |
6922 | c = XFASTINT (ch); | |
6923 | CHECK_CODING_SYSTEM_GET_SPEC (Vbig5_coding_system, spec); | |
6924 | attrs = AREF (spec, 0); | |
6925 | if (ASCII_CHAR_P (c) | |
6926 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
6927 | return ch; | |
6928 | ||
6929 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
6930 | charset = char_charset (c, charset_list, &code); | |
6931 | if (code == CHARSET_INVALID_CODE (charset)) | |
6932 | error ("Can't encode by Big5 encoding: %d", c); | |
6933 | ||
6934 | return make_number (code); | |
4ed46869 | 6935 | } |
df7492f9 | 6936 | |
3a73fa5d | 6937 | \f |
1ba9e4ab KH |
6938 | DEFUN ("set-terminal-coding-system-internal", |
6939 | Fset_terminal_coding_system_internal, | |
48b0f3ae PJ |
6940 | Sset_terminal_coding_system_internal, 1, 1, 0, |
6941 | doc: /* Internal use only. */) | |
6942 | (coding_system) | |
4ed46869 | 6943 | { |
b7826503 | 6944 | CHECK_SYMBOL (coding_system); |
df7492f9 KH |
6945 | setup_coding_system (Fcheck_coding_system (coding_system), |
6946 | &terminal_coding); | |
6947 | ||
70c22245 | 6948 | /* We had better not send unsafe characters to terminal. */ |
df7492f9 KH |
6949 | terminal_coding.mode |= CODING_MODE_SAFE_ENCODING; |
6950 | /* Characer composition should be disabled. */ | |
6951 | terminal_coding.common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
b73bfc1c KH |
6952 | terminal_coding.src_multibyte = 1; |
6953 | terminal_coding.dst_multibyte = 0; | |
4ed46869 KH |
6954 | return Qnil; |
6955 | } | |
6956 | ||
c4825358 KH |
6957 | DEFUN ("set-safe-terminal-coding-system-internal", |
6958 | Fset_safe_terminal_coding_system_internal, | |
48b0f3ae | 6959 | Sset_safe_terminal_coding_system_internal, 1, 1, 0, |
ddb67bdc | 6960 | doc: /* Internal use only. */) |
48b0f3ae | 6961 | (coding_system) |
c4825358 | 6962 | { |
b7826503 | 6963 | CHECK_SYMBOL (coding_system); |
c4825358 KH |
6964 | setup_coding_system (Fcheck_coding_system (coding_system), |
6965 | &safe_terminal_coding); | |
df7492f9 KH |
6966 | /* Characer composition should be disabled. */ |
6967 | safe_terminal_coding.common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
b73bfc1c KH |
6968 | safe_terminal_coding.src_multibyte = 1; |
6969 | safe_terminal_coding.dst_multibyte = 0; | |
c4825358 KH |
6970 | return Qnil; |
6971 | } | |
6972 | ||
4ed46869 KH |
6973 | DEFUN ("terminal-coding-system", |
6974 | Fterminal_coding_system, Sterminal_coding_system, 0, 0, 0, | |
48b0f3ae PJ |
6975 | doc: /* Return coding system specified for terminal output. */) |
6976 | () | |
4ed46869 | 6977 | { |
df7492f9 | 6978 | return CODING_ID_NAME (terminal_coding.id); |
4ed46869 KH |
6979 | } |
6980 | ||
1ba9e4ab KH |
6981 | DEFUN ("set-keyboard-coding-system-internal", |
6982 | Fset_keyboard_coding_system_internal, | |
48b0f3ae PJ |
6983 | Sset_keyboard_coding_system_internal, 1, 1, 0, |
6984 | doc: /* Internal use only. */) | |
6985 | (coding_system) | |
4ed46869 KH |
6986 | Lisp_Object coding_system; |
6987 | { | |
b7826503 | 6988 | CHECK_SYMBOL (coding_system); |
df7492f9 KH |
6989 | setup_coding_system (Fcheck_coding_system (coding_system), |
6990 | &keyboard_coding); | |
6991 | /* Characer composition should be disabled. */ | |
6992 | keyboard_coding.common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
4ed46869 KH |
6993 | return Qnil; |
6994 | } | |
6995 | ||
6996 | DEFUN ("keyboard-coding-system", | |
6997 | Fkeyboard_coding_system, Skeyboard_coding_system, 0, 0, 0, | |
48b0f3ae PJ |
6998 | doc: /* Return coding system specified for decoding keyboard input. */) |
6999 | () | |
4ed46869 | 7000 | { |
df7492f9 | 7001 | return CODING_ID_NAME (keyboard_coding.id); |
4ed46869 KH |
7002 | } |
7003 | ||
7004 | \f | |
a5d301df KH |
7005 | DEFUN ("find-operation-coding-system", Ffind_operation_coding_system, |
7006 | Sfind_operation_coding_system, 1, MANY, 0, | |
48b0f3ae PJ |
7007 | doc: /* Choose a coding system for an operation based on the target name. |
7008 | The value names a pair of coding systems: (DECODING-SYSTEM . ENCODING-SYSTEM). | |
7009 | DECODING-SYSTEM is the coding system to use for decoding | |
7010 | \(in case OPERATION does decoding), and ENCODING-SYSTEM is the coding system | |
7011 | for encoding (in case OPERATION does encoding). | |
7012 | ||
7013 | The first argument OPERATION specifies an I/O primitive: | |
7014 | For file I/O, `insert-file-contents' or `write-region'. | |
7015 | For process I/O, `call-process', `call-process-region', or `start-process'. | |
7016 | For network I/O, `open-network-stream'. | |
7017 | ||
7018 | The remaining arguments should be the same arguments that were passed | |
7019 | to the primitive. Depending on which primitive, one of those arguments | |
7020 | is selected as the TARGET. For example, if OPERATION does file I/O, | |
7021 | whichever argument specifies the file name is TARGET. | |
7022 | ||
7023 | TARGET has a meaning which depends on OPERATION: | |
7024 | For file I/O, TARGET is a file name. | |
7025 | For process I/O, TARGET is a process name. | |
7026 | For network I/O, TARGET is a service name or a port number | |
7027 | ||
7028 | This function looks up what specified for TARGET in, | |
7029 | `file-coding-system-alist', `process-coding-system-alist', | |
7030 | or `network-coding-system-alist' depending on OPERATION. | |
7031 | They may specify a coding system, a cons of coding systems, | |
7032 | or a function symbol to call. | |
7033 | In the last case, we call the function with one argument, | |
7034 | which is a list of all the arguments given to this function. | |
7035 | ||
7036 | usage: (find-operation-coding-system OPERATION ARGUMENTS ...) */) | |
7037 | (nargs, args) | |
4ed46869 KH |
7038 | int nargs; |
7039 | Lisp_Object *args; | |
7040 | { | |
7041 | Lisp_Object operation, target_idx, target, val; | |
7042 | register Lisp_Object chain; | |
7043 | ||
7044 | if (nargs < 2) | |
7045 | error ("Too few arguments"); | |
7046 | operation = args[0]; | |
7047 | if (!SYMBOLP (operation) | |
7048 | || !INTEGERP (target_idx = Fget (operation, Qtarget_idx))) | |
df7492f9 | 7049 | error ("Invalid first arguement"); |
4ed46869 KH |
7050 | if (nargs < 1 + XINT (target_idx)) |
7051 | error ("Too few arguments for operation: %s", | |
7052 | XSYMBOL (operation)->name->data); | |
7053 | target = args[XINT (target_idx) + 1]; | |
7054 | if (!(STRINGP (target) | |
7055 | || (EQ (operation, Qopen_network_stream) && INTEGERP (target)))) | |
df7492f9 | 7056 | error ("Invalid %dth argument", XINT (target_idx) + 1); |
4ed46869 | 7057 | |
2e34157c RS |
7058 | chain = ((EQ (operation, Qinsert_file_contents) |
7059 | || EQ (operation, Qwrite_region)) | |
02ba4723 | 7060 | ? Vfile_coding_system_alist |
2e34157c | 7061 | : (EQ (operation, Qopen_network_stream) |
02ba4723 KH |
7062 | ? Vnetwork_coding_system_alist |
7063 | : Vprocess_coding_system_alist)); | |
4ed46869 KH |
7064 | if (NILP (chain)) |
7065 | return Qnil; | |
7066 | ||
03699b14 | 7067 | for (; CONSP (chain); chain = XCDR (chain)) |
4ed46869 | 7068 | { |
f44d27ce | 7069 | Lisp_Object elt; |
4ed46869 | 7070 | |
df7492f9 | 7071 | elt = XCAR (chain); |
4ed46869 KH |
7072 | if (CONSP (elt) |
7073 | && ((STRINGP (target) | |
03699b14 KR |
7074 | && STRINGP (XCAR (elt)) |
7075 | && fast_string_match (XCAR (elt), target) >= 0) | |
7076 | || (INTEGERP (target) && EQ (target, XCAR (elt))))) | |
02ba4723 | 7077 | { |
03699b14 | 7078 | val = XCDR (elt); |
b19fd4c5 KH |
7079 | /* Here, if VAL is both a valid coding system and a valid |
7080 | function symbol, we return VAL as a coding system. */ | |
02ba4723 KH |
7081 | if (CONSP (val)) |
7082 | return val; | |
7083 | if (! SYMBOLP (val)) | |
7084 | return Qnil; | |
7085 | if (! NILP (Fcoding_system_p (val))) | |
7086 | return Fcons (val, val); | |
b19fd4c5 KH |
7087 | if (! NILP (Ffboundp (val))) |
7088 | { | |
7089 | val = call1 (val, Flist (nargs, args)); | |
7090 | if (CONSP (val)) | |
7091 | return val; | |
7092 | if (SYMBOLP (val) && ! NILP (Fcoding_system_p (val))) | |
7093 | return Fcons (val, val); | |
7094 | } | |
02ba4723 KH |
7095 | return Qnil; |
7096 | } | |
4ed46869 KH |
7097 | } |
7098 | return Qnil; | |
7099 | } | |
7100 | ||
df7492f9 KH |
7101 | DEFUN ("set-coding-system-priority", Fset_coding_system_priority, |
7102 | Sset_coding_system_priority, 1, MANY, 0, | |
7103 | doc: /* Put higher priority to coding systems of the arguments. */) | |
7104 | (nargs, args) | |
7105 | int nargs; | |
7106 | Lisp_Object *args; | |
7107 | { | |
7108 | int i, j; | |
7109 | int changed[coding_category_max]; | |
7110 | enum coding_category priorities[coding_category_max]; | |
7111 | ||
7112 | bzero (changed, sizeof changed); | |
7113 | ||
7114 | for (i = j = 0; i < nargs; i++) | |
7115 | { | |
7116 | enum coding_category category; | |
7117 | Lisp_Object spec, attrs; | |
7118 | ||
7119 | CHECK_CODING_SYSTEM_GET_SPEC (args[i], spec); | |
7120 | attrs = AREF (spec, 0); | |
7121 | category = XINT (CODING_ATTR_CATEGORY (attrs)); | |
7122 | if (changed[category]) | |
7123 | /* Ignore this coding system because a coding system of the | |
7124 | same category already had a higher priority. */ | |
7125 | continue; | |
7126 | changed[category] = 1; | |
7127 | priorities[j++] = category; | |
7128 | if (coding_categories[category].id >= 0 | |
7129 | && ! EQ (args[i], CODING_ID_NAME (coding_categories[category].id))) | |
7130 | setup_coding_system (args[i], &coding_categories[category]); | |
7131 | } | |
7132 | ||
7133 | /* Now we have decided top J priorities. Reflect the order of the | |
7134 | original priorities to the remaining priorities. */ | |
7135 | ||
7136 | for (i = j, j = 0; i < coding_category_max; i++, j++) | |
7137 | { | |
7138 | while (j < coding_category_max | |
7139 | && changed[coding_priorities[j]]) | |
7140 | j++; | |
7141 | if (j == coding_category_max) | |
7142 | abort (); | |
7143 | priorities[i] = coding_priorities[j]; | |
7144 | } | |
7145 | ||
7146 | bcopy (priorities, coding_priorities, sizeof priorities); | |
7147 | return Qnil; | |
7148 | } | |
7149 | ||
7150 | DEFUN ("coding-system-priority-list", Fcoding_system_priority_list, | |
7151 | Scoding_system_priority_list, 0, 1, 0, | |
7152 | doc: /* Return a list of coding systems ordered by their priorities. */) | |
7153 | (highestp) | |
7154 | Lisp_Object highestp; | |
d46c5b12 KH |
7155 | { |
7156 | int i; | |
df7492f9 | 7157 | Lisp_Object val; |
d46c5b12 | 7158 | |
df7492f9 | 7159 | for (i = 0, val = Qnil; i < coding_category_max; i++) |
d46c5b12 | 7160 | { |
df7492f9 KH |
7161 | enum coding_category category = coding_priorities[i]; |
7162 | int id = coding_categories[category].id; | |
7163 | Lisp_Object attrs; | |
7164 | ||
7165 | if (id < 0) | |
7166 | continue; | |
7167 | attrs = CODING_ID_ATTRS (id); | |
7168 | if (! NILP (highestp)) | |
7169 | return CODING_ATTR_BASE_NAME (attrs); | |
7170 | val = Fcons (CODING_ATTR_BASE_NAME (attrs), val); | |
7171 | } | |
7172 | return Fnreverse (val); | |
7173 | } | |
7174 | ||
7175 | static Lisp_Object | |
7176 | make_subsidiaries (base) | |
7177 | Lisp_Object base; | |
7178 | { | |
7179 | Lisp_Object subsidiaries; | |
7180 | char *suffixes[] = { "-unix", "-dos", "-mac" }; | |
7181 | int base_name_len = STRING_BYTES (XSYMBOL (base)->name); | |
7182 | char *buf = (char *) alloca (base_name_len + 6); | |
7183 | int i; | |
7184 | ||
7185 | bcopy (XSYMBOL (base)->name->data, buf, base_name_len); | |
7186 | subsidiaries = Fmake_vector (make_number (3), Qnil); | |
7187 | for (i = 0; i < 3; i++) | |
7188 | { | |
7189 | bcopy (suffixes[i], buf + base_name_len, strlen (suffixes[i]) + 1); | |
7190 | ASET (subsidiaries, i, intern (buf)); | |
7191 | } | |
7192 | return subsidiaries; | |
7193 | } | |
7194 | ||
7195 | ||
7196 | DEFUN ("define-coding-system-internal", Fdefine_coding_system_internal, | |
7197 | Sdefine_coding_system_internal, coding_arg_max, MANY, 0, | |
7198 | doc: /* For internal use only. */) | |
7199 | (nargs, args) | |
7200 | int nargs; | |
7201 | Lisp_Object *args; | |
7202 | { | |
7203 | Lisp_Object name; | |
7204 | Lisp_Object spec_vec; /* [ ATTRS ALIASE EOL_TYPE ] */ | |
7205 | Lisp_Object attrs; /* Vector of attributes. */ | |
7206 | Lisp_Object eol_type; | |
7207 | Lisp_Object aliases; | |
7208 | Lisp_Object coding_type, charset_list, safe_charsets; | |
7209 | enum coding_category category; | |
7210 | Lisp_Object tail, val; | |
7211 | int max_charset_id = 0; | |
7212 | int i; | |
7213 | ||
7214 | if (nargs < coding_arg_max) | |
7215 | goto short_args; | |
7216 | ||
7217 | attrs = Fmake_vector (make_number (coding_attr_last_index), Qnil); | |
7218 | ||
7219 | name = args[coding_arg_name]; | |
7220 | CHECK_SYMBOL (name); | |
7221 | CODING_ATTR_BASE_NAME (attrs) = name; | |
7222 | ||
7223 | val = args[coding_arg_mnemonic]; | |
7224 | if (! STRINGP (val)) | |
7225 | CHECK_CHARACTER (val); | |
7226 | CODING_ATTR_MNEMONIC (attrs) = val; | |
7227 | ||
7228 | coding_type = args[coding_arg_coding_type]; | |
7229 | CHECK_SYMBOL (coding_type); | |
7230 | CODING_ATTR_TYPE (attrs) = coding_type; | |
7231 | ||
7232 | charset_list = args[coding_arg_charset_list]; | |
7233 | if (SYMBOLP (charset_list)) | |
7234 | { | |
7235 | if (EQ (charset_list, Qiso_2022)) | |
7236 | { | |
7237 | if (! EQ (coding_type, Qiso_2022)) | |
7238 | error ("Invalid charset-list"); | |
7239 | charset_list = Viso_2022_charset_list; | |
7240 | } | |
7241 | else if (EQ (charset_list, Qemacs_mule)) | |
7242 | { | |
7243 | if (! EQ (coding_type, Qemacs_mule)) | |
7244 | error ("Invalid charset-list"); | |
7245 | charset_list = Vemacs_mule_charset_list; | |
7246 | } | |
7247 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
7248 | if (max_charset_id < XFASTINT (XCAR (tail))) | |
7249 | max_charset_id = XFASTINT (XCAR (tail)); | |
7250 | } | |
7251 | else | |
7252 | { | |
7253 | charset_list = Fcopy_sequence (charset_list); | |
7254 | for (tail = charset_list; !NILP (tail); tail = Fcdr (tail)) | |
7255 | { | |
7256 | struct charset *charset; | |
7257 | ||
7258 | val = Fcar (tail); | |
7259 | CHECK_CHARSET_GET_CHARSET (val, charset); | |
7260 | if (EQ (coding_type, Qiso_2022) | |
7261 | ? CHARSET_ISO_FINAL (charset) < 0 | |
7262 | : EQ (coding_type, Qemacs_mule) | |
7263 | ? CHARSET_EMACS_MULE_ID (charset) < 0 | |
7264 | : 0) | |
7265 | error ("Can't handle charset `%s'", | |
7266 | XSYMBOL (CHARSET_NAME (charset))->name->data); | |
7267 | ||
7268 | XCAR (tail) = make_number (charset->id); | |
7269 | if (max_charset_id < charset->id) | |
7270 | max_charset_id = charset->id; | |
7271 | } | |
7272 | } | |
7273 | CODING_ATTR_CHARSET_LIST (attrs) = charset_list; | |
7274 | ||
7275 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), | |
7276 | make_number (255)); | |
7277 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
7278 | XSTRING (safe_charsets)->data[XFASTINT (XCAR (tail))] = 0; | |
7279 | CODING_ATTR_SAFE_CHARSETS (attrs) = safe_charsets; | |
7280 | ||
7281 | val = args[coding_arg_decode_translation_table]; | |
7282 | if (! NILP (val)) | |
7283 | CHECK_CHAR_TABLE (val); | |
7284 | CODING_ATTR_DECODE_TBL (attrs) = val; | |
7285 | ||
7286 | val = args[coding_arg_encode_translation_table]; | |
7287 | if (! NILP (val)) | |
7288 | CHECK_CHAR_TABLE (val); | |
7289 | CODING_ATTR_ENCODE_TBL (attrs) = val; | |
7290 | ||
7291 | val = args[coding_arg_post_read_conversion]; | |
7292 | CHECK_SYMBOL (val); | |
7293 | CODING_ATTR_POST_READ (attrs) = val; | |
7294 | ||
7295 | val = args[coding_arg_pre_write_conversion]; | |
7296 | CHECK_SYMBOL (val); | |
7297 | CODING_ATTR_PRE_WRITE (attrs) = val; | |
7298 | ||
7299 | val = args[coding_arg_default_char]; | |
7300 | if (NILP (val)) | |
7301 | CODING_ATTR_DEFAULT_CHAR (attrs) = make_number (' '); | |
7302 | else | |
7303 | { | |
7304 | CHECK_CHARACTER (val); | |
7305 | CODING_ATTR_DEFAULT_CHAR (attrs) = val; | |
7306 | } | |
7307 | ||
7308 | val = args[coding_arg_plist]; | |
7309 | CHECK_LIST (val); | |
7310 | CODING_ATTR_PLIST (attrs) = val; | |
7311 | ||
7312 | if (EQ (coding_type, Qcharset)) | |
7313 | { | |
7314 | val = Fmake_vector (make_number (256), Qnil); | |
7315 | ||
7316 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
7317 | { | |
7318 | struct charset *charset = CHARSET_FROM_ID (XINT (XCAR (tail))); | |
7319 | ||
7320 | for (i = charset->code_space[0]; i <= charset->code_space[1]; i++) | |
7321 | if (NILP (AREF (val, i))) | |
7322 | ASET (val, i, XCAR (tail)); | |
7323 | } | |
7324 | ASET (attrs, coding_attr_charset_valids, val); | |
7325 | category = coding_category_charset; | |
7326 | } | |
7327 | else if (EQ (coding_type, Qccl)) | |
7328 | { | |
7329 | Lisp_Object valids; | |
7330 | ||
7331 | if (nargs < coding_arg_ccl_max) | |
7332 | goto short_args; | |
7333 | ||
7334 | val = args[coding_arg_ccl_decoder]; | |
7335 | CHECK_CCL_PROGRAM (val); | |
7336 | if (VECTORP (val)) | |
7337 | val = Fcopy_sequence (val); | |
7338 | ASET (attrs, coding_attr_ccl_decoder, val); | |
7339 | ||
7340 | val = args[coding_arg_ccl_encoder]; | |
7341 | CHECK_CCL_PROGRAM (val); | |
7342 | if (VECTORP (val)) | |
7343 | val = Fcopy_sequence (val); | |
7344 | ASET (attrs, coding_attr_ccl_encoder, val); | |
7345 | ||
7346 | val = args[coding_arg_ccl_valids]; | |
7347 | valids = Fmake_string (make_number (256), make_number (0)); | |
7348 | for (tail = val; !NILP (tail); tail = Fcdr (tail)) | |
7349 | { | |
7350 | val = Fcar (tail); | |
7351 | if (INTEGERP (val)) | |
7352 | ASET (valids, XINT (val), 1); | |
7353 | else | |
7354 | { | |
7355 | int from, to; | |
7356 | ||
7357 | CHECK_CONS (val); | |
7358 | CHECK_NUMBER (XCAR (val)); | |
7359 | CHECK_NUMBER (XCDR (val)); | |
7360 | from = XINT (XCAR (val)); | |
7361 | to = XINT (XCDR (val)); | |
7362 | for (i = from; i <= to; i++) | |
7363 | ASET (valids, i, 1); | |
7364 | } | |
7365 | } | |
7366 | ASET (attrs, coding_attr_ccl_valids, valids); | |
7367 | ||
7368 | category = coding_category_ccl; | |
7369 | } | |
7370 | else if (EQ (coding_type, Qutf_16)) | |
7371 | { | |
7372 | Lisp_Object bom, endian; | |
7373 | ||
7374 | if (nargs < coding_arg_utf16_max) | |
7375 | goto short_args; | |
7376 | ||
7377 | bom = args[coding_arg_utf16_bom]; | |
7378 | if (! NILP (bom) && ! EQ (bom, Qt)) | |
7379 | { | |
7380 | CHECK_CONS (bom); | |
7381 | CHECK_CODING_SYSTEM (XCAR (bom)); | |
7382 | CHECK_CODING_SYSTEM (XCDR (bom)); | |
7383 | } | |
7384 | ASET (attrs, coding_attr_utf_16_bom, bom); | |
7385 | ||
7386 | endian = args[coding_arg_utf16_endian]; | |
7387 | ASET (attrs, coding_attr_utf_16_endian, endian); | |
7388 | ||
7389 | category = (CONSP (bom) | |
7390 | ? coding_category_utf_16_auto | |
7391 | : NILP (bom) | |
7392 | ? (NILP (endian) | |
7393 | ? coding_category_utf_16_be_nosig | |
7394 | : coding_category_utf_16_le_nosig) | |
7395 | : (NILP (endian) | |
7396 | ? coding_category_utf_16_be | |
7397 | : coding_category_utf_16_le)); | |
7398 | } | |
7399 | else if (EQ (coding_type, Qiso_2022)) | |
7400 | { | |
7401 | Lisp_Object initial, reg_usage, request, flags; | |
7402 | struct charset *charset; | |
0be8721c | 7403 | int i, id; |
1397dc18 | 7404 | |
df7492f9 KH |
7405 | if (nargs < coding_arg_iso2022_max) |
7406 | goto short_args; | |
7407 | ||
7408 | initial = Fcopy_sequence (args[coding_arg_iso2022_initial]); | |
7409 | CHECK_VECTOR (initial); | |
7410 | for (i = 0; i < 4; i++) | |
7411 | { | |
7412 | val = Faref (initial, make_number (i)); | |
7413 | if (! NILP (val)) | |
7414 | { | |
7415 | CHECK_CHARSET_GET_ID (val, id); | |
7416 | ASET (initial, i, make_number (id)); | |
7417 | } | |
7418 | else | |
7419 | ASET (initial, i, make_number (-1)); | |
7420 | } | |
7421 | ||
7422 | reg_usage = args[coding_arg_iso2022_reg_usage]; | |
7423 | CHECK_CONS (reg_usage); | |
7424 | CHECK_NATNUM (XCAR (reg_usage)); | |
7425 | CHECK_NATNUM (XCDR (reg_usage)); | |
7426 | ||
7427 | request = Fcopy_sequence (args[coding_arg_iso2022_request]); | |
7428 | for (tail = request; ! NILP (tail); tail = Fcdr (tail)) | |
1397dc18 | 7429 | { |
df7492f9 KH |
7430 | int id; |
7431 | ||
7432 | val = Fcar (tail); | |
7433 | CHECK_CONS (val); | |
7434 | CHECK_CHARSET_GET_ID (XCAR (val), id); | |
7435 | CHECK_NATNUM (XCDR (val)); | |
7436 | if (XINT (XCDR (val)) >= 4) | |
7437 | error ("Invalid graphic register number: %d", XINT (XCDR (val))); | |
7438 | XCAR (val) = make_number (id); | |
1397dc18 | 7439 | } |
df7492f9 KH |
7440 | |
7441 | flags = args[coding_arg_iso2022_flags]; | |
7442 | CHECK_NATNUM (flags); | |
7443 | i = XINT (flags); | |
7444 | if (EQ (args[coding_arg_charset_list], Qiso_2022)) | |
7445 | flags = make_number (i | CODING_ISO_FLAG_FULL_SUPPORT); | |
7446 | ||
7447 | ASET (attrs, coding_attr_iso_initial, initial); | |
7448 | ASET (attrs, coding_attr_iso_usage, reg_usage); | |
7449 | ASET (attrs, coding_attr_iso_request, request); | |
7450 | ASET (attrs, coding_attr_iso_flags, flags); | |
7451 | setup_iso_safe_charsets (attrs); | |
7452 | ||
7453 | if (i & CODING_ISO_FLAG_SEVEN_BITS) | |
7454 | category = ((i & (CODING_ISO_FLAG_LOCKING_SHIFT | |
7455 | | CODING_ISO_FLAG_SINGLE_SHIFT)) | |
7456 | ? coding_category_iso_7_else | |
7457 | : EQ (args[coding_arg_charset_list], Qiso_2022) | |
7458 | ? coding_category_iso_7 | |
7459 | : coding_category_iso_7_tight); | |
7460 | else | |
7461 | { | |
7462 | int id = XINT (AREF (initial, 1)); | |
7463 | ||
7464 | category = (((i & (CODING_ISO_FLAG_LOCKING_SHIFT | |
7465 | | CODING_ISO_FLAG_SINGLE_SHIFT)) | |
7466 | || EQ (args[coding_arg_charset_list], Qiso_2022) | |
7467 | || id < 0) | |
7468 | ? coding_category_iso_8_else | |
7469 | : (CHARSET_DIMENSION (CHARSET_FROM_ID (id)) == 1) | |
7470 | ? coding_category_iso_8_1 | |
7471 | : coding_category_iso_8_2); | |
7472 | } | |
7473 | } | |
7474 | else if (EQ (coding_type, Qemacs_mule)) | |
7475 | { | |
7476 | if (EQ (args[coding_arg_charset_list], Qemacs_mule)) | |
7477 | ASET (attrs, coding_attr_emacs_mule_full, Qt); | |
7478 | ||
7479 | category = coding_category_emacs_mule; | |
7480 | } | |
7481 | else if (EQ (coding_type, Qshift_jis)) | |
7482 | { | |
7483 | ||
7484 | struct charset *charset; | |
7485 | ||
7486 | if (XINT (Flength (charset_list)) != 3) | |
7487 | error ("There should be just three charsets"); | |
7488 | ||
7489 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
7490 | if (CHARSET_DIMENSION (charset) != 1) | |
7491 | error ("Dimension of charset %s is not one", | |
7492 | XSYMBOL (CHARSET_NAME (charset))->name->data); | |
7493 | ||
7494 | charset_list = XCDR (charset_list); | |
7495 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
7496 | if (CHARSET_DIMENSION (charset) != 1) | |
7497 | error ("Dimension of charset %s is not one", | |
7498 | XSYMBOL (CHARSET_NAME (charset))->name->data); | |
7499 | ||
7500 | charset_list = XCDR (charset_list); | |
7501 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
7502 | if (CHARSET_DIMENSION (charset) != 2) | |
7503 | error ("Dimension of charset %s is not two", | |
7504 | XSYMBOL (CHARSET_NAME (charset))->name->data); | |
7505 | ||
7506 | category = coding_category_sjis; | |
7507 | Vsjis_coding_system = name; | |
7508 | } | |
7509 | else if (EQ (coding_type, Qbig5)) | |
7510 | { | |
7511 | struct charset *charset; | |
7512 | ||
7513 | if (XINT (Flength (charset_list)) != 2) | |
7514 | error ("There should be just two charsets"); | |
7515 | ||
7516 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
7517 | if (CHARSET_DIMENSION (charset) != 1) | |
7518 | error ("Dimension of charset %s is not one", | |
7519 | XSYMBOL (CHARSET_NAME (charset))->name->data); | |
7520 | ||
7521 | charset_list = XCDR (charset_list); | |
7522 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
7523 | if (CHARSET_DIMENSION (charset) != 2) | |
7524 | error ("Dimension of charset %s is not two", | |
7525 | XSYMBOL (CHARSET_NAME (charset))->name->data); | |
7526 | ||
7527 | category = coding_category_big5; | |
7528 | Vbig5_coding_system = name; | |
7529 | } | |
7530 | else if (EQ (coding_type, Qraw_text)) | |
7531 | category = coding_category_raw_text; | |
7532 | else if (EQ (coding_type, Qutf_8)) | |
7533 | category = coding_category_utf_8; | |
7534 | else if (EQ (coding_type, Qundecided)) | |
7535 | category = coding_category_undecided; | |
7536 | else | |
7537 | error ("Invalid coding system type: %s", | |
7538 | XSYMBOL (coding_type)->name->data); | |
7539 | ||
7540 | CODING_ATTR_CATEGORY (attrs) = make_number (category); | |
7541 | ||
7542 | eol_type = args[coding_arg_eol_type]; | |
7543 | if (! NILP (eol_type) | |
7544 | && ! EQ (eol_type, Qunix) | |
7545 | && ! EQ (eol_type, Qdos) | |
7546 | && ! EQ (eol_type, Qmac)) | |
7547 | error ("Invalid eol-type"); | |
7548 | ||
7549 | aliases = Fcons (name, Qnil); | |
7550 | ||
7551 | if (NILP (eol_type)) | |
7552 | { | |
7553 | eol_type = make_subsidiaries (name); | |
7554 | for (i = 0; i < 3; i++) | |
1397dc18 | 7555 | { |
df7492f9 KH |
7556 | Lisp_Object this_spec, this_name, this_aliases, this_eol_type; |
7557 | ||
7558 | this_name = AREF (eol_type, i); | |
7559 | this_aliases = Fcons (this_name, Qnil); | |
7560 | this_eol_type = (i == 0 ? Qunix : i == 1 ? Qdos : Qmac); | |
7561 | this_spec = Fmake_vector (make_number (3), attrs); | |
7562 | ASET (this_spec, 1, this_aliases); | |
7563 | ASET (this_spec, 2, this_eol_type); | |
7564 | Fputhash (this_name, this_spec, Vcoding_system_hash_table); | |
7565 | Vcoding_system_list = Fcons (this_name, Vcoding_system_list); | |
7566 | Vcoding_system_alist = Fcons (Fcons (Fsymbol_name (this_name), Qnil), | |
7567 | Vcoding_system_alist); | |
1397dc18 | 7568 | } |
d46c5b12 | 7569 | } |
1397dc18 | 7570 | |
df7492f9 KH |
7571 | spec_vec = Fmake_vector (make_number (3), attrs); |
7572 | ASET (spec_vec, 1, aliases); | |
7573 | ASET (spec_vec, 2, eol_type); | |
7574 | ||
7575 | Fputhash (name, spec_vec, Vcoding_system_hash_table); | |
7576 | Vcoding_system_list = Fcons (name, Vcoding_system_list); | |
7577 | Vcoding_system_alist = Fcons (Fcons (Fsymbol_name (name), Qnil), | |
7578 | Vcoding_system_alist); | |
7579 | ||
7580 | { | |
7581 | int id = coding_categories[category].id; | |
7582 | ||
7583 | if (id < 0 || EQ (name, CODING_ID_NAME (id))) | |
7584 | setup_coding_system (name, &coding_categories[category]); | |
7585 | } | |
7586 | ||
d46c5b12 | 7587 | return Qnil; |
df7492f9 KH |
7588 | |
7589 | short_args: | |
7590 | return Fsignal (Qwrong_number_of_arguments, | |
7591 | Fcons (intern ("define-coding-system-internal"), | |
7592 | make_number (nargs))); | |
d46c5b12 KH |
7593 | } |
7594 | ||
df7492f9 KH |
7595 | DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, |
7596 | Sdefine_coding_system_alias, 2, 2, 0, | |
7597 | doc: /* Define ALIAS as an alias for CODING-SYSTEM. */) | |
7598 | (alias, coding_system) | |
7599 | Lisp_Object alias, coding_system; | |
66cfb530 | 7600 | { |
df7492f9 | 7601 | Lisp_Object spec, aliases, eol_type; |
84d60297 | 7602 | |
df7492f9 KH |
7603 | CHECK_SYMBOL (alias); |
7604 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
7605 | aliases = AREF (spec, 1); | |
7606 | while (!NILP (XCDR (aliases))) | |
7607 | aliases = XCDR (aliases); | |
7608 | XCDR (aliases) = Fcons (alias, Qnil); | |
66cfb530 | 7609 | |
df7492f9 KH |
7610 | eol_type = AREF (spec, 2); |
7611 | if (VECTORP (eol_type)) | |
66cfb530 | 7612 | { |
df7492f9 KH |
7613 | Lisp_Object subsidiaries; |
7614 | int i; | |
7615 | ||
7616 | subsidiaries = make_subsidiaries (alias); | |
7617 | for (i = 0; i < 3; i++) | |
7618 | Fdefine_coding_system_alias (AREF (subsidiaries, i), | |
7619 | AREF (eol_type, i)); | |
7620 | ||
7621 | ASET (spec, 2, subsidiaries); | |
66cfb530 | 7622 | } |
df7492f9 KH |
7623 | |
7624 | Fputhash (alias, spec, Vcoding_system_hash_table); | |
2c78b7e1 | 7625 | Vcoding_system_alist = Fcons (Fcons (alias, Qnil), Vcoding_system_alist); |
66cfb530 KH |
7626 | |
7627 | return Qnil; | |
7628 | } | |
7629 | ||
df7492f9 KH |
7630 | DEFUN ("coding-system-base", Fcoding_system_base, Scoding_system_base, |
7631 | 1, 1, 0, | |
7632 | doc: /* Return the base of CODING-SYSTEM. | |
7633 | Any alias or subsidiary coding systems are not base coding system. */) | |
7634 | (coding_system) | |
7635 | Lisp_Object coding_system; | |
7636 | { | |
7637 | Lisp_Object spec, attrs; | |
7638 | ||
7639 | if (NILP (coding_system)) | |
7640 | return (Qno_conversion); | |
7641 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
7642 | attrs = AREF (spec, 0); | |
7643 | return CODING_ATTR_BASE_NAME (attrs); | |
7644 | } | |
7645 | ||
7646 | DEFUN ("coding-system-plist", Fcoding_system_plist, Scoding_system_plist, | |
7647 | 1, 1, 0, | |
7648 | doc: "Return the property list of CODING-SYSTEM.") | |
7649 | (coding_system) | |
7650 | Lisp_Object coding_system; | |
7651 | { | |
7652 | Lisp_Object spec, attrs; | |
7653 | ||
7654 | if (NILP (coding_system)) | |
7655 | coding_system = Qno_conversion; | |
7656 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
7657 | attrs = AREF (spec, 0); | |
7658 | return CODING_ATTR_PLIST (attrs); | |
7659 | } | |
7660 | ||
7661 | ||
7662 | DEFUN ("coding-system-aliases", Fcoding_system_aliases, Scoding_system_aliases, | |
7663 | 1, 1, 0, | |
7664 | doc: /* Return the list of aliases of CODING-SYSTEM. | |
7665 | A base coding system is what made by `define-coding-system'. | |
7666 | Any alias nor subsidiary coding systems are not base coding system. */) | |
7667 | (coding_system) | |
7668 | Lisp_Object coding_system; | |
7669 | { | |
7670 | Lisp_Object spec; | |
7671 | ||
7672 | if (NILP (coding_system)) | |
7673 | coding_system = Qno_conversion; | |
7674 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
7675 | return AREF (spec, 2); | |
7676 | } | |
7677 | ||
7678 | DEFUN ("coding-system-eol-type", Fcoding_system_eol_type, | |
7679 | Scoding_system_eol_type, 1, 1, 0, | |
7680 | doc: /* Return eol-type of CODING-SYSTEM. | |
7681 | An eol-type is integer 0, 1, 2, or a vector of coding systems. | |
7682 | ||
7683 | Integer values 0, 1, and 2 indicate a format of end-of-line; LF, CRLF, | |
7684 | and CR respectively. | |
7685 | ||
7686 | A vector value indicates that a format of end-of-line should be | |
7687 | detected automatically. Nth element of the vector is the subsidiary | |
7688 | coding system whose eol-type is N. */) | |
7689 | (coding_system) | |
7690 | Lisp_Object coding_system; | |
7691 | { | |
7692 | Lisp_Object spec, eol_type; | |
7693 | int n; | |
7694 | ||
7695 | if (NILP (coding_system)) | |
7696 | coding_system = Qno_conversion; | |
7697 | if (! CODING_SYSTEM_P (coding_system)) | |
7698 | return Qnil; | |
7699 | spec = CODING_SYSTEM_SPEC (coding_system); | |
7700 | eol_type = AREF (spec, 2); | |
7701 | if (VECTORP (eol_type)) | |
7702 | return Fcopy_sequence (eol_type); | |
7703 | n = EQ (eol_type, Qunix) ? 0 : EQ (eol_type, Qdos) ? 1 : 2; | |
7704 | return make_number (n); | |
7705 | } | |
7706 | ||
4ed46869 KH |
7707 | #endif /* emacs */ |
7708 | ||
7709 | \f | |
1397dc18 | 7710 | /*** 9. Post-amble ***/ |
4ed46869 | 7711 | |
dfcf069d | 7712 | void |
4ed46869 KH |
7713 | init_coding_once () |
7714 | { | |
7715 | int i; | |
7716 | ||
df7492f9 KH |
7717 | for (i = 0; i < coding_category_max; i++) |
7718 | { | |
7719 | coding_categories[i].id = -1; | |
7720 | coding_priorities[i] = i; | |
7721 | } | |
4ed46869 KH |
7722 | |
7723 | /* ISO2022 specific initialize routine. */ | |
7724 | for (i = 0; i < 0x20; i++) | |
b73bfc1c | 7725 | iso_code_class[i] = ISO_control_0; |
4ed46869 KH |
7726 | for (i = 0x21; i < 0x7F; i++) |
7727 | iso_code_class[i] = ISO_graphic_plane_0; | |
7728 | for (i = 0x80; i < 0xA0; i++) | |
b73bfc1c | 7729 | iso_code_class[i] = ISO_control_1; |
4ed46869 KH |
7730 | for (i = 0xA1; i < 0xFF; i++) |
7731 | iso_code_class[i] = ISO_graphic_plane_1; | |
7732 | iso_code_class[0x20] = iso_code_class[0x7F] = ISO_0x20_or_0x7F; | |
7733 | iso_code_class[0xA0] = iso_code_class[0xFF] = ISO_0xA0_or_0xFF; | |
7734 | iso_code_class[ISO_CODE_CR] = ISO_carriage_return; | |
7735 | iso_code_class[ISO_CODE_SO] = ISO_shift_out; | |
7736 | iso_code_class[ISO_CODE_SI] = ISO_shift_in; | |
7737 | iso_code_class[ISO_CODE_SS2_7] = ISO_single_shift_2_7; | |
7738 | iso_code_class[ISO_CODE_ESC] = ISO_escape; | |
7739 | iso_code_class[ISO_CODE_SS2] = ISO_single_shift_2; | |
7740 | iso_code_class[ISO_CODE_SS3] = ISO_single_shift_3; | |
7741 | iso_code_class[ISO_CODE_CSI] = ISO_control_sequence_introducer; | |
7742 | ||
b843d1ae | 7743 | inhibit_pre_post_conversion = 0; |
df7492f9 KH |
7744 | |
7745 | for (i = 0; i < 256; i++) | |
7746 | { | |
7747 | emacs_mule_bytes[i] = 1; | |
7748 | } | |
e0e989f6 KH |
7749 | } |
7750 | ||
7751 | #ifdef emacs | |
7752 | ||
dfcf069d | 7753 | void |
e0e989f6 KH |
7754 | syms_of_coding () |
7755 | { | |
df7492f9 KH |
7756 | staticpro (&Vcoding_system_hash_table); |
7757 | Vcoding_system_hash_table = Fmakehash (Qeq); | |
7758 | ||
7759 | staticpro (&Vsjis_coding_system); | |
7760 | Vsjis_coding_system = Qnil; | |
7761 | ||
7762 | staticpro (&Vbig5_coding_system); | |
7763 | Vbig5_coding_system = Qnil; | |
7764 | ||
7765 | staticpro (&Vcode_conversion_work_buf_list); | |
7766 | Vcode_conversion_work_buf_list = Qnil; | |
e0e989f6 | 7767 | |
df7492f9 KH |
7768 | staticpro (&Vcode_conversion_reused_work_buf); |
7769 | Vcode_conversion_reused_work_buf = Qnil; | |
7770 | ||
7771 | DEFSYM (Qcharset, "charset"); | |
7772 | DEFSYM (Qtarget_idx, "target-idx"); | |
7773 | DEFSYM (Qcoding_system_history, "coding-system-history"); | |
bb0115a2 RS |
7774 | Fset (Qcoding_system_history, Qnil); |
7775 | ||
9ce27fde | 7776 | /* Target FILENAME is the first argument. */ |
e0e989f6 | 7777 | Fput (Qinsert_file_contents, Qtarget_idx, make_number (0)); |
9ce27fde | 7778 | /* Target FILENAME is the third argument. */ |
e0e989f6 KH |
7779 | Fput (Qwrite_region, Qtarget_idx, make_number (2)); |
7780 | ||
df7492f9 | 7781 | DEFSYM (Qcall_process, "call-process"); |
9ce27fde | 7782 | /* Target PROGRAM is the first argument. */ |
e0e989f6 KH |
7783 | Fput (Qcall_process, Qtarget_idx, make_number (0)); |
7784 | ||
df7492f9 | 7785 | DEFSYM (Qcall_process_region, "call-process-region"); |
9ce27fde | 7786 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
7787 | Fput (Qcall_process_region, Qtarget_idx, make_number (2)); |
7788 | ||
df7492f9 | 7789 | DEFSYM (Qstart_process, "start-process"); |
9ce27fde | 7790 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
7791 | Fput (Qstart_process, Qtarget_idx, make_number (2)); |
7792 | ||
df7492f9 | 7793 | DEFSYM (Qopen_network_stream, "open-network-stream"); |
9ce27fde | 7794 | /* Target SERVICE is the fourth argument. */ |
e0e989f6 KH |
7795 | Fput (Qopen_network_stream, Qtarget_idx, make_number (3)); |
7796 | ||
df7492f9 KH |
7797 | DEFSYM (Qcoding_system, "coding-system"); |
7798 | DEFSYM (Qcoding_aliases, "coding-aliases"); | |
4ed46869 | 7799 | |
df7492f9 KH |
7800 | DEFSYM (Qeol_type, "eol-type"); |
7801 | DEFSYM (Qunix, "unix"); | |
7802 | DEFSYM (Qdos, "dos"); | |
7803 | DEFSYM (Qmac, "mac"); | |
4ed46869 | 7804 | |
df7492f9 KH |
7805 | DEFSYM (Qbuffer_file_coding_system, "buffer-file-coding-system"); |
7806 | DEFSYM (Qpost_read_conversion, "post-read-conversion"); | |
7807 | DEFSYM (Qpre_write_conversion, "pre-write-conversion"); | |
7808 | DEFSYM (Qdefault_char, "default-char"); | |
7809 | DEFSYM (Qundecided, "undecided"); | |
7810 | DEFSYM (Qno_conversion, "no-conversion"); | |
7811 | DEFSYM (Qraw_text, "raw-text"); | |
4ed46869 | 7812 | |
df7492f9 | 7813 | DEFSYM (Qiso_2022, "iso-2022"); |
4ed46869 | 7814 | |
df7492f9 | 7815 | DEFSYM (Qutf_8, "utf-8"); |
27901516 | 7816 | |
df7492f9 KH |
7817 | DEFSYM (Qutf_16, "utf-16"); |
7818 | DEFSYM (Qutf_16_be, "utf-16-be"); | |
7819 | DEFSYM (Qutf_16_be_nosig, "utf-16-be-nosig"); | |
7820 | DEFSYM (Qutf_16_le, "utf-16-l3"); | |
7821 | DEFSYM (Qutf_16_le_nosig, "utf-16-le-nosig"); | |
7822 | DEFSYM (Qsignature, "signature"); | |
7823 | DEFSYM (Qendian, "endian"); | |
7824 | DEFSYM (Qbig, "big"); | |
7825 | DEFSYM (Qlittle, "little"); | |
27901516 | 7826 | |
df7492f9 KH |
7827 | DEFSYM (Qshift_jis, "shift-jis"); |
7828 | DEFSYM (Qbig5, "big5"); | |
4ed46869 | 7829 | |
df7492f9 | 7830 | DEFSYM (Qcoding_system_p, "coding-system-p"); |
4ed46869 | 7831 | |
df7492f9 | 7832 | DEFSYM (Qcoding_system_error, "coding-system-error"); |
4ed46869 KH |
7833 | Fput (Qcoding_system_error, Qerror_conditions, |
7834 | Fcons (Qcoding_system_error, Fcons (Qerror, Qnil))); | |
7835 | Fput (Qcoding_system_error, Qerror_message, | |
9ce27fde | 7836 | build_string ("Invalid coding system")); |
4ed46869 | 7837 | |
df7492f9 KH |
7838 | /* Intern this now in case it isn't already done. |
7839 | Setting this variable twice is harmless. | |
7840 | But don't staticpro it here--that is done in alloc.c. */ | |
7841 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
4ed46869 | 7842 | |
df7492f9 | 7843 | DEFSYM (Qtranslation_table, "translation-table"); |
1397dc18 | 7844 | Fput (Qtranslation_table, Qchar_table_extra_slots, make_number (1)); |
df7492f9 KH |
7845 | DEFSYM (Qtranslation_table_id, "translation-table-id"); |
7846 | DEFSYM (Qtranslation_table_for_decode, "translation-table-for-decode"); | |
7847 | DEFSYM (Qtranslation_table_for_encode, "translation-table-for-encode"); | |
bdd9fb48 | 7848 | |
df7492f9 | 7849 | DEFSYM (Qchar_coding_system, "char-coding-system"); |
84fbb8a0 | 7850 | |
df7492f9 | 7851 | Fput (Qchar_coding_system, Qchar_table_extra_slots, make_number (2)); |
a5d301df | 7852 | |
df7492f9 | 7853 | DEFSYM (Qvalid_codes, "valid-codes"); |
05e6f5dc | 7854 | |
df7492f9 | 7855 | DEFSYM (Qemacs_mule, "emacs-mule"); |
05e6f5dc | 7856 | |
df7492f9 KH |
7857 | Vcoding_category_table |
7858 | = Fmake_vector (make_number (coding_category_max), Qnil); | |
7859 | staticpro (&Vcoding_category_table); | |
7860 | /* Followings are target of code detection. */ | |
7861 | ASET (Vcoding_category_table, coding_category_iso_7, | |
7862 | intern ("coding-category-iso-7")); | |
7863 | ASET (Vcoding_category_table, coding_category_iso_7_tight, | |
7864 | intern ("coding-category-iso-7-tight")); | |
7865 | ASET (Vcoding_category_table, coding_category_iso_8_1, | |
7866 | intern ("coding-category-iso-8-1")); | |
7867 | ASET (Vcoding_category_table, coding_category_iso_8_2, | |
7868 | intern ("coding-category-iso-8-2")); | |
7869 | ASET (Vcoding_category_table, coding_category_iso_7_else, | |
7870 | intern ("coding-category-iso-7-else")); | |
7871 | ASET (Vcoding_category_table, coding_category_iso_8_else, | |
7872 | intern ("coding-category-iso-8-else")); | |
7873 | ASET (Vcoding_category_table, coding_category_utf_8, | |
7874 | intern ("coding-category-utf-8")); | |
7875 | ASET (Vcoding_category_table, coding_category_utf_16_be, | |
7876 | intern ("coding-category-utf-16-be")); | |
7877 | ASET (Vcoding_category_table, coding_category_utf_16_le, | |
7878 | intern ("coding-category-utf-16-le")); | |
7879 | ASET (Vcoding_category_table, coding_category_utf_16_be_nosig, | |
7880 | intern ("coding-category-utf-16-be-nosig")); | |
7881 | ASET (Vcoding_category_table, coding_category_utf_16_le_nosig, | |
7882 | intern ("coding-category-utf-16-le-nosig")); | |
7883 | ASET (Vcoding_category_table, coding_category_charset, | |
7884 | intern ("coding-category-charset")); | |
7885 | ASET (Vcoding_category_table, coding_category_sjis, | |
7886 | intern ("coding-category-sjis")); | |
7887 | ASET (Vcoding_category_table, coding_category_big5, | |
7888 | intern ("coding-category-big5")); | |
7889 | ASET (Vcoding_category_table, coding_category_ccl, | |
7890 | intern ("coding-category-ccl")); | |
7891 | ASET (Vcoding_category_table, coding_category_emacs_mule, | |
7892 | intern ("coding-category-emacs-mule")); | |
7893 | /* Followings are NOT target of code detection. */ | |
7894 | ASET (Vcoding_category_table, coding_category_raw_text, | |
7895 | intern ("coding-category-raw-text")); | |
7896 | ASET (Vcoding_category_table, coding_category_undecided, | |
7897 | intern ("coding-category-undecided")); | |
70c22245 | 7898 | |
4ed46869 KH |
7899 | defsubr (&Scoding_system_p); |
7900 | defsubr (&Sread_coding_system); | |
7901 | defsubr (&Sread_non_nil_coding_system); | |
7902 | defsubr (&Scheck_coding_system); | |
7903 | defsubr (&Sdetect_coding_region); | |
d46c5b12 | 7904 | defsubr (&Sdetect_coding_string); |
05e6f5dc | 7905 | defsubr (&Sfind_coding_systems_region_internal); |
df7492f9 | 7906 | defsubr (&Scheck_coding_systems_region); |
4ed46869 KH |
7907 | defsubr (&Sdecode_coding_region); |
7908 | defsubr (&Sencode_coding_region); | |
7909 | defsubr (&Sdecode_coding_string); | |
7910 | defsubr (&Sencode_coding_string); | |
7911 | defsubr (&Sdecode_sjis_char); | |
7912 | defsubr (&Sencode_sjis_char); | |
7913 | defsubr (&Sdecode_big5_char); | |
7914 | defsubr (&Sencode_big5_char); | |
1ba9e4ab | 7915 | defsubr (&Sset_terminal_coding_system_internal); |
c4825358 | 7916 | defsubr (&Sset_safe_terminal_coding_system_internal); |
4ed46869 | 7917 | defsubr (&Sterminal_coding_system); |
1ba9e4ab | 7918 | defsubr (&Sset_keyboard_coding_system_internal); |
4ed46869 | 7919 | defsubr (&Skeyboard_coding_system); |
a5d301df | 7920 | defsubr (&Sfind_operation_coding_system); |
df7492f9 KH |
7921 | defsubr (&Sset_coding_system_priority); |
7922 | defsubr (&Sdefine_coding_system_internal); | |
7923 | defsubr (&Sdefine_coding_system_alias); | |
7924 | defsubr (&Scoding_system_base); | |
7925 | defsubr (&Scoding_system_plist); | |
7926 | defsubr (&Scoding_system_aliases); | |
7927 | defsubr (&Scoding_system_eol_type); | |
7928 | defsubr (&Scoding_system_priority_list); | |
4ed46869 | 7929 | |
4608c386 | 7930 | DEFVAR_LISP ("coding-system-list", &Vcoding_system_list, |
48b0f3ae PJ |
7931 | doc: /* List of coding systems. |
7932 | ||
7933 | Do not alter the value of this variable manually. This variable should be | |
df7492f9 | 7934 | updated by the functions `define-coding-system' and |
48b0f3ae | 7935 | `define-coding-system-alias'. */); |
4608c386 KH |
7936 | Vcoding_system_list = Qnil; |
7937 | ||
7938 | DEFVAR_LISP ("coding-system-alist", &Vcoding_system_alist, | |
48b0f3ae PJ |
7939 | doc: /* Alist of coding system names. |
7940 | Each element is one element list of coding system name. | |
7941 | This variable is given to `completing-read' as TABLE argument. | |
7942 | ||
7943 | Do not alter the value of this variable manually. This variable should be | |
7944 | updated by the functions `make-coding-system' and | |
7945 | `define-coding-system-alias'. */); | |
4608c386 KH |
7946 | Vcoding_system_alist = Qnil; |
7947 | ||
4ed46869 | 7948 | DEFVAR_LISP ("coding-category-list", &Vcoding_category_list, |
48b0f3ae PJ |
7949 | doc: /* List of coding-categories (symbols) ordered by priority. |
7950 | ||
7951 | On detecting a coding system, Emacs tries code detection algorithms | |
7952 | associated with each coding-category one by one in this order. When | |
7953 | one algorithm agrees with a byte sequence of source text, the coding | |
7954 | system bound to the corresponding coding-category is selected. */); | |
4ed46869 KH |
7955 | { |
7956 | int i; | |
7957 | ||
7958 | Vcoding_category_list = Qnil; | |
df7492f9 | 7959 | for (i = coding_category_max - 1; i >= 0; i--) |
4ed46869 | 7960 | Vcoding_category_list |
d46c5b12 KH |
7961 | = Fcons (XVECTOR (Vcoding_category_table)->contents[i], |
7962 | Vcoding_category_list); | |
4ed46869 KH |
7963 | } |
7964 | ||
7965 | DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read, | |
48b0f3ae PJ |
7966 | doc: /* Specify the coding system for read operations. |
7967 | It is useful to bind this variable with `let', but do not set it globally. | |
7968 | If the value is a coding system, it is used for decoding on read operation. | |
7969 | If not, an appropriate element is used from one of the coding system alists: | |
7970 | There are three such tables, `file-coding-system-alist', | |
7971 | `process-coding-system-alist', and `network-coding-system-alist'. */); | |
4ed46869 KH |
7972 | Vcoding_system_for_read = Qnil; |
7973 | ||
7974 | DEFVAR_LISP ("coding-system-for-write", &Vcoding_system_for_write, | |
48b0f3ae PJ |
7975 | doc: /* Specify the coding system for write operations. |
7976 | Programs bind this variable with `let', but you should not set it globally. | |
7977 | If the value is a coding system, it is used for encoding of output, | |
7978 | when writing it to a file and when sending it to a file or subprocess. | |
7979 | ||
7980 | If this does not specify a coding system, an appropriate element | |
7981 | is used from one of the coding system alists: | |
7982 | There are three such tables, `file-coding-system-alist', | |
7983 | `process-coding-system-alist', and `network-coding-system-alist'. | |
7984 | For output to files, if the above procedure does not specify a coding system, | |
7985 | the value of `buffer-file-coding-system' is used. */); | |
4ed46869 KH |
7986 | Vcoding_system_for_write = Qnil; |
7987 | ||
7988 | DEFVAR_LISP ("last-coding-system-used", &Vlast_coding_system_used, | |
df7492f9 KH |
7989 | doc: /* |
7990 | Coding system used in the latest file or process I/O. */); | |
4ed46869 KH |
7991 | Vlast_coding_system_used = Qnil; |
7992 | ||
9ce27fde | 7993 | DEFVAR_BOOL ("inhibit-eol-conversion", &inhibit_eol_conversion, |
df7492f9 KH |
7994 | doc: /* |
7995 | *Non-nil means always inhibit code conversion of end-of-line format. | |
48b0f3ae PJ |
7996 | See info node `Coding Systems' and info node `Text and Binary' concerning |
7997 | such conversion. */); | |
9ce27fde KH |
7998 | inhibit_eol_conversion = 0; |
7999 | ||
ed29121d | 8000 | DEFVAR_BOOL ("inherit-process-coding-system", &inherit_process_coding_system, |
df7492f9 KH |
8001 | doc: /* |
8002 | Non-nil means process buffer inherits coding system of process output. | |
48b0f3ae PJ |
8003 | Bind it to t if the process output is to be treated as if it were a file |
8004 | read from some filesystem. */); | |
ed29121d EZ |
8005 | inherit_process_coding_system = 0; |
8006 | ||
02ba4723 | 8007 | DEFVAR_LISP ("file-coding-system-alist", &Vfile_coding_system_alist, |
df7492f9 KH |
8008 | doc: /* |
8009 | Alist to decide a coding system to use for a file I/O operation. | |
48b0f3ae PJ |
8010 | The format is ((PATTERN . VAL) ...), |
8011 | where PATTERN is a regular expression matching a file name, | |
8012 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
8013 | If VAL is a coding system, it is used for both decoding and encoding | |
8014 | the file contents. | |
8015 | If VAL is a cons of coding systems, the car part is used for decoding, | |
8016 | and the cdr part is used for encoding. | |
8017 | If VAL is a function symbol, the function must return a coding system | |
0192762c DL |
8018 | or a cons of coding systems which are used as above. The function gets |
8019 | the arguments with which `find-operation-coding-systems' was called. | |
48b0f3ae PJ |
8020 | |
8021 | See also the function `find-operation-coding-system' | |
8022 | and the variable `auto-coding-alist'. */); | |
02ba4723 KH |
8023 | Vfile_coding_system_alist = Qnil; |
8024 | ||
8025 | DEFVAR_LISP ("process-coding-system-alist", &Vprocess_coding_system_alist, | |
df7492f9 KH |
8026 | doc: /* |
8027 | Alist to decide a coding system to use for a process I/O operation. | |
48b0f3ae PJ |
8028 | The format is ((PATTERN . VAL) ...), |
8029 | where PATTERN is a regular expression matching a program name, | |
8030 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
8031 | If VAL is a coding system, it is used for both decoding what received | |
8032 | from the program and encoding what sent to the program. | |
8033 | If VAL is a cons of coding systems, the car part is used for decoding, | |
8034 | and the cdr part is used for encoding. | |
8035 | If VAL is a function symbol, the function must return a coding system | |
8036 | or a cons of coding systems which are used as above. | |
8037 | ||
8038 | See also the function `find-operation-coding-system'. */); | |
02ba4723 KH |
8039 | Vprocess_coding_system_alist = Qnil; |
8040 | ||
8041 | DEFVAR_LISP ("network-coding-system-alist", &Vnetwork_coding_system_alist, | |
df7492f9 KH |
8042 | doc: /* |
8043 | Alist to decide a coding system to use for a network I/O operation. | |
48b0f3ae PJ |
8044 | The format is ((PATTERN . VAL) ...), |
8045 | where PATTERN is a regular expression matching a network service name | |
8046 | or is a port number to connect to, | |
8047 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
8048 | If VAL is a coding system, it is used for both decoding what received | |
8049 | from the network stream and encoding what sent to the network stream. | |
8050 | If VAL is a cons of coding systems, the car part is used for decoding, | |
8051 | and the cdr part is used for encoding. | |
8052 | If VAL is a function symbol, the function must return a coding system | |
8053 | or a cons of coding systems which are used as above. | |
8054 | ||
8055 | See also the function `find-operation-coding-system'. */); | |
02ba4723 | 8056 | Vnetwork_coding_system_alist = Qnil; |
4ed46869 | 8057 | |
68c45bf0 | 8058 | DEFVAR_LISP ("locale-coding-system", &Vlocale_coding_system, |
75205970 RS |
8059 | doc: /* Coding system to use with system messages. |
8060 | Also used for decoding keyboard input on X Window system. */); | |
68c45bf0 PE |
8061 | Vlocale_coding_system = Qnil; |
8062 | ||
005f0d35 | 8063 | /* The eol mnemonics are reset in startup.el system-dependently. */ |
7722baf9 | 8064 | DEFVAR_LISP ("eol-mnemonic-unix", &eol_mnemonic_unix, |
df7492f9 KH |
8065 | doc: /* |
8066 | *String displayed in mode line for UNIX-like (LF) end-of-line format. */); | |
7722baf9 | 8067 | eol_mnemonic_unix = build_string (":"); |
4ed46869 | 8068 | |
7722baf9 | 8069 | DEFVAR_LISP ("eol-mnemonic-dos", &eol_mnemonic_dos, |
df7492f9 KH |
8070 | doc: /* |
8071 | *String displayed in mode line for DOS-like (CRLF) end-of-line format. */); | |
7722baf9 | 8072 | eol_mnemonic_dos = build_string ("\\"); |
4ed46869 | 8073 | |
7722baf9 | 8074 | DEFVAR_LISP ("eol-mnemonic-mac", &eol_mnemonic_mac, |
df7492f9 KH |
8075 | doc: /* |
8076 | *String displayed in mode line for MAC-like (CR) end-of-line format. */); | |
7722baf9 | 8077 | eol_mnemonic_mac = build_string ("/"); |
4ed46869 | 8078 | |
7722baf9 | 8079 | DEFVAR_LISP ("eol-mnemonic-undecided", &eol_mnemonic_undecided, |
df7492f9 KH |
8080 | doc: /* |
8081 | *String displayed in mode line when end-of-line format is not yet determined. */); | |
7722baf9 | 8082 | eol_mnemonic_undecided = build_string (":"); |
4ed46869 | 8083 | |
84fbb8a0 | 8084 | DEFVAR_LISP ("enable-character-translation", &Venable_character_translation, |
df7492f9 KH |
8085 | doc: /* |
8086 | *Non-nil enables character translation while encoding and decoding. */); | |
84fbb8a0 | 8087 | Venable_character_translation = Qt; |
bdd9fb48 | 8088 | |
f967223b | 8089 | DEFVAR_LISP ("standard-translation-table-for-decode", |
48b0f3ae PJ |
8090 | &Vstandard_translation_table_for_decode, |
8091 | doc: /* Table for translating characters while decoding. */); | |
f967223b | 8092 | Vstandard_translation_table_for_decode = Qnil; |
bdd9fb48 | 8093 | |
f967223b | 8094 | DEFVAR_LISP ("standard-translation-table-for-encode", |
48b0f3ae PJ |
8095 | &Vstandard_translation_table_for_encode, |
8096 | doc: /* Table for translating characters while encoding. */); | |
f967223b | 8097 | Vstandard_translation_table_for_encode = Qnil; |
4ed46869 | 8098 | |
df7492f9 | 8099 | DEFVAR_LISP ("charset-revision-table", &Vcharset_revision_table, |
48b0f3ae PJ |
8100 | doc: /* Alist of charsets vs revision numbers. |
8101 | While encoding, if a charset (car part of an element) is found, | |
df7492f9 KH |
8102 | designate it with the escape sequence identifying revision (cdr part |
8103 | of the element). */); | |
8104 | Vcharset_revision_table = Qnil; | |
02ba4723 KH |
8105 | |
8106 | DEFVAR_LISP ("default-process-coding-system", | |
8107 | &Vdefault_process_coding_system, | |
48b0f3ae PJ |
8108 | doc: /* Cons of coding systems used for process I/O by default. |
8109 | The car part is used for decoding a process output, | |
8110 | the cdr part is used for encoding a text to be sent to a process. */); | |
02ba4723 | 8111 | Vdefault_process_coding_system = Qnil; |
c4825358 | 8112 | |
3f003981 | 8113 | DEFVAR_LISP ("latin-extra-code-table", &Vlatin_extra_code_table, |
df7492f9 KH |
8114 | doc: /* |
8115 | Table of extra Latin codes in the range 128..159 (inclusive). | |
48b0f3ae PJ |
8116 | This is a vector of length 256. |
8117 | If Nth element is non-nil, the existence of code N in a file | |
8118 | \(or output of subprocess) doesn't prevent it to be detected as | |
8119 | a coding system of ISO 2022 variant which has a flag | |
8120 | `accept-latin-extra-code' t (e.g. iso-latin-1) on reading a file | |
8121 | or reading output of a subprocess. | |
8122 | Only 128th through 159th elements has a meaning. */); | |
3f003981 | 8123 | Vlatin_extra_code_table = Fmake_vector (make_number (256), Qnil); |
d46c5b12 KH |
8124 | |
8125 | DEFVAR_LISP ("select-safe-coding-system-function", | |
8126 | &Vselect_safe_coding_system_function, | |
df7492f9 KH |
8127 | doc: /* |
8128 | Function to call to select safe coding system for encoding a text. | |
48b0f3ae PJ |
8129 | |
8130 | If set, this function is called to force a user to select a proper | |
8131 | coding system which can encode the text in the case that a default | |
8132 | coding system used in each operation can't encode the text. | |
8133 | ||
8134 | The default value is `select-safe-coding-system' (which see). */); | |
d46c5b12 KH |
8135 | Vselect_safe_coding_system_function = Qnil; |
8136 | ||
05e6f5dc | 8137 | DEFVAR_LISP ("char-coding-system-table", &Vchar_coding_system_table, |
df7492f9 KH |
8138 | doc: /* |
8139 | Char-table containing safe coding systems of each characters. | |
48b0f3ae PJ |
8140 | Each element doesn't include such generic coding systems that can |
8141 | encode any characters. They are in the first extra slot. */); | |
05e6f5dc KH |
8142 | Vchar_coding_system_table = Fmake_char_table (Qchar_coding_system, Qnil); |
8143 | ||
22ab2303 | 8144 | DEFVAR_BOOL ("inhibit-iso-escape-detection", |
74383408 | 8145 | &inhibit_iso_escape_detection, |
df7492f9 KH |
8146 | doc: /* |
8147 | If non-nil, Emacs ignores ISO2022's escape sequence on code detection. | |
48b0f3ae PJ |
8148 | |
8149 | By default, on reading a file, Emacs tries to detect how the text is | |
8150 | encoded. This code detection is sensitive to escape sequences. If | |
8151 | the sequence is valid as ISO2022, the code is determined as one of | |
8152 | the ISO2022 encodings, and the file is decoded by the corresponding | |
8153 | coding system (e.g. `iso-2022-7bit'). | |
8154 | ||
8155 | However, there may be a case that you want to read escape sequences in | |
8156 | a file as is. In such a case, you can set this variable to non-nil. | |
8157 | Then, as the code detection ignores any escape sequences, no file is | |
8158 | detected as encoded in some ISO2022 encoding. The result is that all | |
8159 | escape sequences become visible in a buffer. | |
8160 | ||
8161 | The default value is nil, and it is strongly recommended not to change | |
8162 | it. That is because many Emacs Lisp source files that contain | |
8163 | non-ASCII characters are encoded by the coding system `iso-2022-7bit' | |
8164 | in Emacs's distribution, and they won't be decoded correctly on | |
8165 | reading if you suppress escape sequence detection. | |
8166 | ||
8167 | The other way to read escape sequences in a file without decoding is | |
8168 | to explicitly specify some coding system that doesn't use ISO2022's | |
8169 | escape sequence (e.g `latin-1') on reading by \\[universal-coding-system-argument]. */); | |
74383408 | 8170 | inhibit_iso_escape_detection = 0; |
2c78b7e1 KH |
8171 | |
8172 | { | |
8173 | Lisp_Object args[coding_arg_max]; | |
8174 | Lisp_Object plist[14]; | |
8175 | int i; | |
8176 | ||
8177 | for (i = 0; i < coding_arg_max; i++) | |
8178 | args[i] = Qnil; | |
8179 | ||
8180 | plist[0] = intern (":name"); | |
8181 | plist[1] = args[coding_arg_name] = Qno_conversion; | |
8182 | plist[2] = intern (":mnemonic"); | |
8183 | plist[3] = args[coding_arg_mnemonic] = make_number ('='); | |
8184 | plist[4] = intern (":coding-type"); | |
8185 | plist[5] = args[coding_arg_coding_type] = Qraw_text; | |
8186 | plist[6] = intern (":ascii-compatible-p"); | |
8187 | plist[7] = args[coding_arg_ascii_compatible_p] = Qt; | |
8188 | plist[8] = intern (":default-char"); | |
8189 | plist[9] = args[coding_arg_default_char] = make_number (0); | |
8190 | plist[10] = intern (":docstring"); | |
8191 | plist[11] = build_string ("Do no conversion.\n\ | |
8192 | \n\ | |
8193 | When you visit a file with this coding, the file is read into a\n\ | |
8194 | unibyte buffer as is, thus each byte of a file is treated as a\n\ | |
8195 | character."); | |
8196 | plist[12] = intern (":eol-type"); | |
8197 | plist[13] = args[coding_arg_eol_type] = Qunix; | |
8198 | args[coding_arg_plist] = Flist (14, plist); | |
8199 | Fdefine_coding_system_internal (coding_arg_max, args); | |
8200 | } | |
8201 | ||
8202 | setup_coding_system (Qno_conversion, &keyboard_coding); | |
8203 | setup_coding_system (Qno_conversion, &terminal_coding); | |
8204 | setup_coding_system (Qno_conversion, &safe_terminal_coding); | |
4ed46869 KH |
8205 | } |
8206 | ||
68c45bf0 PE |
8207 | char * |
8208 | emacs_strerror (error_number) | |
8209 | int error_number; | |
8210 | { | |
8211 | char *str; | |
8212 | ||
ca9c0567 | 8213 | synchronize_system_messages_locale (); |
68c45bf0 PE |
8214 | str = strerror (error_number); |
8215 | ||
8216 | if (! NILP (Vlocale_coding_system)) | |
8217 | { | |
8218 | Lisp_Object dec = code_convert_string_norecord (build_string (str), | |
8219 | Vlocale_coding_system, | |
8220 | 0); | |
8221 | str = (char *) XSTRING (dec)->data; | |
8222 | } | |
8223 | ||
8224 | return str; | |
8225 | } | |
8226 | ||
4ed46869 | 8227 | #endif /* emacs */ |