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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 | |
5bad0796 DL |
49 | A coding system is an object for an encoding mechanism that contains |
50 | information about how to convert byte sequences to character | |
e19c3639 KH |
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 | |
5bad0796 | 60 | stored in the hash table Vcharset_hash_table. The conversion from |
e19c3639 KH |
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 | |
5bad0796 | 65 | the encoding mechanism. Here's a brief description of the types. |
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. | |
5bad0796 | 74 | Decoding and encoding are done by a code converter defined for each |
df7492f9 KH |
75 | character set. |
76 | ||
5bad0796 | 77 | o Old Emacs internal format (emacs-mule) |
df7492f9 | 78 | |
5bad0796 | 79 | The coding system adopted by 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 | |
5bad0796 | 104 | If a user wants to decode/encode text encoded in a coding system |
df7492f9 KH |
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 | 111 | A coding system for a text containing raw eight-bit data. Emacs |
5bad0796 | 112 | treats each byte of source text as a character (except for |
df7492f9 | 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 | |
5bad0796 | 122 | How text end-of-line is encoded depends on operating system. For |
df7492f9 | 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 | |
5bad0796 | 128 | Since text character encoding and end-of-line encoding are |
df7492f9 KH |
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 | |
5bad0796 | 137 | conversion (e.g. the location of source and destination data). |
e19c3639 | 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 | ||
df7492f9 KH |
405 | /* Two special coding systems. */ |
406 | Lisp_Object Vsjis_coding_system; | |
407 | Lisp_Object Vbig5_coding_system; | |
408 | ||
409 | ||
410 | static int detect_coding_utf_8 P_ ((struct coding_system *, int *)); | |
411 | static void decode_coding_utf_8 P_ ((struct coding_system *)); | |
412 | static int encode_coding_utf_8 P_ ((struct coding_system *)); | |
413 | ||
414 | static int detect_coding_utf_16 P_ ((struct coding_system *, int *)); | |
415 | static void decode_coding_utf_16 P_ ((struct coding_system *)); | |
416 | static int encode_coding_utf_16 P_ ((struct coding_system *)); | |
417 | ||
418 | static int detect_coding_iso_2022 P_ ((struct coding_system *, int *)); | |
419 | static void decode_coding_iso_2022 P_ ((struct coding_system *)); | |
420 | static int encode_coding_iso_2022 P_ ((struct coding_system *)); | |
421 | ||
422 | static int detect_coding_emacs_mule P_ ((struct coding_system *, int *)); | |
423 | static void decode_coding_emacs_mule P_ ((struct coding_system *)); | |
424 | static int encode_coding_emacs_mule P_ ((struct coding_system *)); | |
425 | ||
426 | static int detect_coding_sjis P_ ((struct coding_system *, int *)); | |
427 | static void decode_coding_sjis P_ ((struct coding_system *)); | |
428 | static int encode_coding_sjis P_ ((struct coding_system *)); | |
429 | ||
430 | static int detect_coding_big5 P_ ((struct coding_system *, int *)); | |
431 | static void decode_coding_big5 P_ ((struct coding_system *)); | |
432 | static int encode_coding_big5 P_ ((struct coding_system *)); | |
433 | ||
434 | static int detect_coding_ccl P_ ((struct coding_system *, int *)); | |
435 | static void decode_coding_ccl P_ ((struct coding_system *)); | |
436 | static int encode_coding_ccl P_ ((struct coding_system *)); | |
437 | ||
438 | static void decode_coding_raw_text P_ ((struct coding_system *)); | |
439 | static int encode_coding_raw_text P_ ((struct coding_system *)); | |
440 | ||
441 | ||
442 | /* ISO2022 section */ | |
443 | ||
444 | #define CODING_ISO_INITIAL(coding, reg) \ | |
445 | (XINT (AREF (AREF (CODING_ID_ATTRS ((coding)->id), \ | |
446 | coding_attr_iso_initial), \ | |
447 | reg))) | |
448 | ||
449 | ||
450 | #define CODING_ISO_REQUEST(coding, charset_id) \ | |
451 | ((charset_id <= (coding)->max_charset_id \ | |
452 | ? (coding)->safe_charsets[charset_id] \ | |
453 | : -1)) | |
454 | ||
455 | ||
456 | #define CODING_ISO_FLAGS(coding) \ | |
457 | ((coding)->spec.iso_2022.flags) | |
458 | #define CODING_ISO_DESIGNATION(coding, reg) \ | |
459 | ((coding)->spec.iso_2022.current_designation[reg]) | |
460 | #define CODING_ISO_INVOCATION(coding, plane) \ | |
461 | ((coding)->spec.iso_2022.current_invocation[plane]) | |
462 | #define CODING_ISO_SINGLE_SHIFTING(coding) \ | |
463 | ((coding)->spec.iso_2022.single_shifting) | |
464 | #define CODING_ISO_BOL(coding) \ | |
465 | ((coding)->spec.iso_2022.bol) | |
466 | #define CODING_ISO_INVOKED_CHARSET(coding, plane) \ | |
467 | CODING_ISO_DESIGNATION ((coding), CODING_ISO_INVOCATION ((coding), (plane))) | |
468 | ||
469 | /* Control characters of ISO2022. */ | |
470 | /* code */ /* function */ | |
471 | #define ISO_CODE_LF 0x0A /* line-feed */ | |
472 | #define ISO_CODE_CR 0x0D /* carriage-return */ | |
473 | #define ISO_CODE_SO 0x0E /* shift-out */ | |
474 | #define ISO_CODE_SI 0x0F /* shift-in */ | |
475 | #define ISO_CODE_SS2_7 0x19 /* single-shift-2 for 7-bit code */ | |
476 | #define ISO_CODE_ESC 0x1B /* escape */ | |
477 | #define ISO_CODE_SS2 0x8E /* single-shift-2 */ | |
478 | #define ISO_CODE_SS3 0x8F /* single-shift-3 */ | |
479 | #define ISO_CODE_CSI 0x9B /* control-sequence-introducer */ | |
480 | ||
481 | /* All code (1-byte) of ISO2022 is classified into one of the | |
482 | followings. */ | |
483 | enum iso_code_class_type | |
484 | { | |
485 | ISO_control_0, /* Control codes in the range | |
486 | 0x00..0x1F and 0x7F, except for the | |
487 | following 5 codes. */ | |
488 | ISO_carriage_return, /* ISO_CODE_CR (0x0D) */ | |
489 | ISO_shift_out, /* ISO_CODE_SO (0x0E) */ | |
490 | ISO_shift_in, /* ISO_CODE_SI (0x0F) */ | |
491 | ISO_single_shift_2_7, /* ISO_CODE_SS2_7 (0x19) */ | |
492 | ISO_escape, /* ISO_CODE_SO (0x1B) */ | |
493 | ISO_control_1, /* Control codes in the range | |
494 | 0x80..0x9F, except for the | |
495 | following 3 codes. */ | |
496 | ISO_single_shift_2, /* ISO_CODE_SS2 (0x8E) */ | |
497 | ISO_single_shift_3, /* ISO_CODE_SS3 (0x8F) */ | |
498 | ISO_control_sequence_introducer, /* ISO_CODE_CSI (0x9B) */ | |
499 | ISO_0x20_or_0x7F, /* Codes of the values 0x20 or 0x7F. */ | |
500 | ISO_graphic_plane_0, /* Graphic codes in the range 0x21..0x7E. */ | |
501 | ISO_0xA0_or_0xFF, /* Codes of the values 0xA0 or 0xFF. */ | |
502 | ISO_graphic_plane_1 /* Graphic codes in the range 0xA1..0xFE. */ | |
503 | }; | |
05e6f5dc | 504 | |
df7492f9 KH |
505 | /** The macros CODING_ISO_FLAG_XXX defines a flag bit of the |
506 | `iso-flags' attribute of an iso2022 coding system. */ | |
93dec019 | 507 | |
df7492f9 KH |
508 | /* If set, produce long-form designation sequence (e.g. ESC $ ( A) |
509 | instead of the correct short-form sequence (e.g. ESC $ A). */ | |
510 | #define CODING_ISO_FLAG_LONG_FORM 0x0001 | |
05e6f5dc | 511 | |
df7492f9 KH |
512 | /* If set, reset graphic planes and registers at end-of-line to the |
513 | initial state. */ | |
514 | #define CODING_ISO_FLAG_RESET_AT_EOL 0x0002 | |
05e6f5dc | 515 | |
df7492f9 KH |
516 | /* If set, reset graphic planes and registers before any control |
517 | characters to the initial state. */ | |
518 | #define CODING_ISO_FLAG_RESET_AT_CNTL 0x0004 | |
4ed46869 | 519 | |
df7492f9 KH |
520 | /* If set, encode by 7-bit environment. */ |
521 | #define CODING_ISO_FLAG_SEVEN_BITS 0x0008 | |
b73bfc1c | 522 | |
df7492f9 KH |
523 | /* If set, use locking-shift function. */ |
524 | #define CODING_ISO_FLAG_LOCKING_SHIFT 0x0010 | |
b73bfc1c | 525 | |
df7492f9 KH |
526 | /* If set, use single-shift function. Overwrite |
527 | CODING_ISO_FLAG_LOCKING_SHIFT. */ | |
528 | #define CODING_ISO_FLAG_SINGLE_SHIFT 0x0020 | |
b73bfc1c | 529 | |
df7492f9 KH |
530 | /* If set, use designation escape sequence. */ |
531 | #define CODING_ISO_FLAG_DESIGNATION 0x0040 | |
b73bfc1c | 532 | |
df7492f9 KH |
533 | /* If set, produce revision number sequence. */ |
534 | #define CODING_ISO_FLAG_REVISION 0x0080 | |
f4dee582 | 535 | |
df7492f9 KH |
536 | /* If set, produce ISO6429's direction specifying sequence. */ |
537 | #define CODING_ISO_FLAG_DIRECTION 0x0100 | |
4ed46869 | 538 | |
df7492f9 KH |
539 | /* If set, assume designation states are reset at beginning of line on |
540 | output. */ | |
541 | #define CODING_ISO_FLAG_INIT_AT_BOL 0x0200 | |
aa72b389 | 542 | |
df7492f9 KH |
543 | /* If set, designation sequence should be placed at beginning of line |
544 | on output. */ | |
545 | #define CODING_ISO_FLAG_DESIGNATE_AT_BOL 0x0400 | |
aa72b389 | 546 | |
df7492f9 KH |
547 | /* If set, do not encode unsafe charactes on output. */ |
548 | #define CODING_ISO_FLAG_SAFE 0x0800 | |
aa72b389 | 549 | |
df7492f9 KH |
550 | /* If set, extra latin codes (128..159) are accepted as a valid code |
551 | on input. */ | |
552 | #define CODING_ISO_FLAG_LATIN_EXTRA 0x1000 | |
aa72b389 | 553 | |
df7492f9 | 554 | #define CODING_ISO_FLAG_COMPOSITION 0x2000 |
aa72b389 | 555 | |
df7492f9 | 556 | #define CODING_ISO_FLAG_EUC_TW_SHIFT 0x4000 |
aa72b389 | 557 | |
df7492f9 | 558 | #define CODING_ISO_FLAG_FULL_SUPPORT 0x8000 |
aa72b389 | 559 | |
df7492f9 KH |
560 | /* A character to be produced on output if encoding of the original |
561 | character is prohibited by CODING_ISO_FLAG_SAFE. */ | |
562 | #define CODING_INHIBIT_CHARACTER_SUBSTITUTION '?' | |
aa72b389 | 563 | |
aa72b389 | 564 | |
df7492f9 KH |
565 | /* UTF-16 section */ |
566 | #define CODING_UTF_16_BOM(coding) \ | |
567 | ((coding)->spec.utf_16.bom) | |
4ed46869 | 568 | |
df7492f9 KH |
569 | #define CODING_UTF_16_ENDIAN(coding) \ |
570 | ((coding)->spec.utf_16.endian) | |
4ed46869 | 571 | |
df7492f9 KH |
572 | #define CODING_UTF_16_SURROGATE(coding) \ |
573 | ((coding)->spec.utf_16.surrogate) | |
4ed46869 | 574 | |
4ed46869 | 575 | |
df7492f9 KH |
576 | /* CCL section */ |
577 | #define CODING_CCL_DECODER(coding) \ | |
578 | AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_decoder) | |
579 | #define CODING_CCL_ENCODER(coding) \ | |
580 | AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_encoder) | |
581 | #define CODING_CCL_VALIDS(coding) \ | |
582 | (XSTRING (AREF (CODING_ID_ATTRS ((coding)->id), coding_attr_ccl_valids)) \ | |
583 | ->data) | |
4ed46869 | 584 | |
df7492f9 | 585 | /* Index for each coding category in `coding_category_table' */ |
4ed46869 | 586 | |
df7492f9 KH |
587 | enum coding_category |
588 | { | |
589 | coding_category_iso_7, | |
590 | coding_category_iso_7_tight, | |
591 | coding_category_iso_8_1, | |
592 | coding_category_iso_8_2, | |
593 | coding_category_iso_7_else, | |
594 | coding_category_iso_8_else, | |
595 | coding_category_utf_8, | |
596 | coding_category_utf_16_auto, | |
597 | coding_category_utf_16_be, | |
598 | coding_category_utf_16_le, | |
599 | coding_category_utf_16_be_nosig, | |
600 | coding_category_utf_16_le_nosig, | |
601 | coding_category_charset, | |
602 | coding_category_sjis, | |
603 | coding_category_big5, | |
604 | coding_category_ccl, | |
605 | coding_category_emacs_mule, | |
606 | /* All above are targets of code detection. */ | |
607 | coding_category_raw_text, | |
608 | coding_category_undecided, | |
609 | coding_category_max | |
610 | }; | |
611 | ||
612 | /* Definitions of flag bits used in detect_coding_XXXX. */ | |
613 | #define CATEGORY_MASK_ISO_7 (1 << coding_category_iso_7) | |
614 | #define CATEGORY_MASK_ISO_7_TIGHT (1 << coding_category_iso_7_tight) | |
615 | #define CATEGORY_MASK_ISO_8_1 (1 << coding_category_iso_8_1) | |
616 | #define CATEGORY_MASK_ISO_8_2 (1 << coding_category_iso_8_2) | |
617 | #define CATEGORY_MASK_ISO_7_ELSE (1 << coding_category_iso_7_else) | |
618 | #define CATEGORY_MASK_ISO_8_ELSE (1 << coding_category_iso_8_else) | |
619 | #define CATEGORY_MASK_UTF_8 (1 << coding_category_utf_8) | |
620 | #define CATEGORY_MASK_UTF_16_BE (1 << coding_category_utf_16_be) | |
621 | #define CATEGORY_MASK_UTF_16_LE (1 << coding_category_utf_16_le) | |
622 | #define CATEGORY_MASK_UTF_16_BE_NOSIG (1 << coding_category_utf_16_be_nosig) | |
623 | #define CATEGORY_MASK_UTF_16_LE_NOSIG (1 << coding_category_utf_16_le_nosig) | |
624 | #define CATEGORY_MASK_CHARSET (1 << coding_category_charset) | |
625 | #define CATEGORY_MASK_SJIS (1 << coding_category_sjis) | |
626 | #define CATEGORY_MASK_BIG5 (1 << coding_category_big5) | |
627 | #define CATEGORY_MASK_CCL (1 << coding_category_ccl) | |
628 | #define CATEGORY_MASK_EMACS_MULE (1 << coding_category_emacs_mule) | |
629 | ||
630 | /* This value is returned if detect_coding_mask () find nothing other | |
631 | than ASCII characters. */ | |
632 | #define CATEGORY_MASK_ANY \ | |
633 | (CATEGORY_MASK_ISO_7 \ | |
634 | | CATEGORY_MASK_ISO_7_TIGHT \ | |
635 | | CATEGORY_MASK_ISO_8_1 \ | |
636 | | CATEGORY_MASK_ISO_8_2 \ | |
637 | | CATEGORY_MASK_ISO_7_ELSE \ | |
638 | | CATEGORY_MASK_ISO_8_ELSE \ | |
639 | | CATEGORY_MASK_UTF_8 \ | |
640 | | CATEGORY_MASK_UTF_16_BE \ | |
641 | | CATEGORY_MASK_UTF_16_LE \ | |
642 | | CATEGORY_MASK_UTF_16_BE_NOSIG \ | |
643 | | CATEGORY_MASK_UTF_16_LE_NOSIG \ | |
644 | | CATEGORY_MASK_CHARSET \ | |
645 | | CATEGORY_MASK_SJIS \ | |
646 | | CATEGORY_MASK_BIG5 \ | |
647 | | CATEGORY_MASK_CCL \ | |
648 | | CATEGORY_MASK_EMACS_MULE) | |
649 | ||
650 | ||
651 | #define CATEGORY_MASK_ISO_7BIT \ | |
652 | (CATEGORY_MASK_ISO_7 | CATEGORY_MASK_ISO_7_TIGHT) | |
653 | ||
654 | #define CATEGORY_MASK_ISO_8BIT \ | |
655 | (CATEGORY_MASK_ISO_8_1 | CATEGORY_MASK_ISO_8_2) | |
656 | ||
657 | #define CATEGORY_MASK_ISO_ELSE \ | |
658 | (CATEGORY_MASK_ISO_7_ELSE | CATEGORY_MASK_ISO_8_ELSE) | |
659 | ||
660 | #define CATEGORY_MASK_ISO_ESCAPE \ | |
661 | (CATEGORY_MASK_ISO_7 \ | |
662 | | CATEGORY_MASK_ISO_7_TIGHT \ | |
663 | | CATEGORY_MASK_ISO_7_ELSE \ | |
664 | | CATEGORY_MASK_ISO_8_ELSE) | |
665 | ||
666 | #define CATEGORY_MASK_ISO \ | |
667 | ( CATEGORY_MASK_ISO_7BIT \ | |
668 | | CATEGORY_MASK_ISO_8BIT \ | |
669 | | CATEGORY_MASK_ISO_ELSE) | |
670 | ||
671 | #define CATEGORY_MASK_UTF_16 \ | |
672 | (CATEGORY_MASK_UTF_16_BE \ | |
673 | | CATEGORY_MASK_UTF_16_LE \ | |
674 | | CATEGORY_MASK_UTF_16_BE_NOSIG \ | |
675 | | CATEGORY_MASK_UTF_16_LE_NOSIG) | |
676 | ||
677 | ||
678 | /* List of symbols `coding-category-xxx' ordered by priority. This | |
679 | variable is exposed to Emacs Lisp. */ | |
680 | static Lisp_Object Vcoding_category_list; | |
681 | ||
682 | /* Table of coding categories (Lisp symbols). This variable is for | |
683 | internal use oly. */ | |
684 | static Lisp_Object Vcoding_category_table; | |
685 | ||
686 | /* Table of coding-categories ordered by priority. */ | |
687 | static enum coding_category coding_priorities[coding_category_max]; | |
688 | ||
689 | /* Nth element is a coding context for the coding system bound to the | |
690 | Nth coding category. */ | |
691 | static struct coding_system coding_categories[coding_category_max]; | |
692 | ||
693 | static int detected_mask[coding_category_raw_text] = | |
694 | { CATEGORY_MASK_ISO, | |
695 | CATEGORY_MASK_ISO, | |
696 | CATEGORY_MASK_ISO, | |
697 | CATEGORY_MASK_ISO, | |
698 | CATEGORY_MASK_ISO, | |
699 | CATEGORY_MASK_ISO, | |
700 | CATEGORY_MASK_UTF_8, | |
701 | CATEGORY_MASK_UTF_16, | |
702 | CATEGORY_MASK_UTF_16, | |
703 | CATEGORY_MASK_UTF_16, | |
704 | CATEGORY_MASK_UTF_16, | |
705 | CATEGORY_MASK_UTF_16, | |
706 | CATEGORY_MASK_CHARSET, | |
707 | CATEGORY_MASK_SJIS, | |
708 | CATEGORY_MASK_BIG5, | |
709 | CATEGORY_MASK_CCL, | |
710 | CATEGORY_MASK_EMACS_MULE | |
711 | }; | |
712 | ||
713 | /*** Commonly used macros and functions ***/ | |
714 | ||
715 | #ifndef min | |
716 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
717 | #endif | |
718 | #ifndef max | |
719 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
720 | #endif | |
4ed46869 | 721 | |
df7492f9 KH |
722 | #define CODING_GET_INFO(coding, attrs, eol_type, charset_list) \ |
723 | do { \ | |
724 | attrs = CODING_ID_ATTRS (coding->id); \ | |
725 | eol_type = CODING_ID_EOL_TYPE (coding->id); \ | |
726 | if (VECTORP (eol_type)) \ | |
727 | eol_type = Qunix; \ | |
728 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); \ | |
729 | } while (0) | |
4ed46869 | 730 | |
4ed46869 | 731 | |
df7492f9 KH |
732 | /* Safely get one byte from the source text pointed by SRC which ends |
733 | at SRC_END, and set C to that byte. If there are not enough bytes | |
734 | in the source, it jumps to `no_more_source'. The caller | |
735 | should declare and set these variables appropriately in advance: | |
736 | src, src_end, multibytep | |
737 | */ | |
aa72b389 | 738 | |
df7492f9 | 739 | #define ONE_MORE_BYTE(c) \ |
aa72b389 | 740 | do { \ |
df7492f9 KH |
741 | if (src == src_end) \ |
742 | { \ | |
743 | if (src_base < src) \ | |
744 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; \ | |
745 | goto no_more_source; \ | |
746 | } \ | |
747 | c = *src++; \ | |
748 | if (multibytep && (c & 0x80)) \ | |
749 | { \ | |
750 | if ((c & 0xFE) != 0xC0) \ | |
751 | error ("Undecodable char found"); \ | |
752 | c = ((c & 1) << 6) | *src++; \ | |
753 | } \ | |
754 | consumed_chars++; \ | |
aa72b389 KH |
755 | } while (0) |
756 | ||
aa72b389 | 757 | |
df7492f9 KH |
758 | #define ONE_MORE_BYTE_NO_CHECK(c) \ |
759 | do { \ | |
760 | c = *src++; \ | |
761 | if (multibytep && (c & 0x80)) \ | |
762 | { \ | |
763 | if ((c & 0xFE) != 0xC0) \ | |
764 | error ("Undecodable char found"); \ | |
765 | c = ((c & 1) << 6) | *src++; \ | |
766 | } \ | |
aa72b389 KH |
767 | } while (0) |
768 | ||
aa72b389 | 769 | |
df7492f9 KH |
770 | /* Store a byte C in the place pointed by DST and increment DST to the |
771 | next free point, and increment PRODUCED_CHARS. The caller should | |
772 | assure that C is 0..127, and declare and set the variable `dst' | |
773 | appropriately in advance. | |
774 | */ | |
aa72b389 KH |
775 | |
776 | ||
df7492f9 KH |
777 | #define EMIT_ONE_ASCII_BYTE(c) \ |
778 | do { \ | |
779 | produced_chars++; \ | |
780 | *dst++ = (c); \ | |
781 | } while (0) | |
aa72b389 | 782 | |
aa72b389 | 783 | |
df7492f9 | 784 | /* Like EMIT_ONE_ASCII_BYTE byt store two bytes; C1 and C2. */ |
aa72b389 | 785 | |
df7492f9 KH |
786 | #define EMIT_TWO_ASCII_BYTES(c1, c2) \ |
787 | do { \ | |
788 | produced_chars += 2; \ | |
789 | *dst++ = (c1), *dst++ = (c2); \ | |
790 | } while (0) | |
aa72b389 | 791 | |
df7492f9 KH |
792 | |
793 | /* Store a byte C in the place pointed by DST and increment DST to the | |
794 | next free point, and increment PRODUCED_CHARS. If MULTIBYTEP is | |
795 | nonzero, store in an appropriate multibyte from. The caller should | |
796 | declare and set the variables `dst' and `multibytep' appropriately | |
797 | in advance. */ | |
798 | ||
799 | #define EMIT_ONE_BYTE(c) \ | |
800 | do { \ | |
801 | produced_chars++; \ | |
802 | if (multibytep) \ | |
803 | { \ | |
804 | int ch = (c); \ | |
805 | if (ch >= 0x80) \ | |
806 | ch = BYTE8_TO_CHAR (ch); \ | |
807 | CHAR_STRING_ADVANCE (ch, dst); \ | |
808 | } \ | |
809 | else \ | |
810 | *dst++ = (c); \ | |
aa72b389 KH |
811 | } while (0) |
812 | ||
813 | ||
df7492f9 | 814 | /* Like EMIT_ONE_BYTE, but emit two bytes; C1 and C2. */ |
aa72b389 | 815 | |
e19c3639 KH |
816 | #define EMIT_TWO_BYTES(c1, c2) \ |
817 | do { \ | |
818 | produced_chars += 2; \ | |
819 | if (multibytep) \ | |
820 | { \ | |
821 | int ch; \ | |
822 | \ | |
823 | ch = (c1); \ | |
824 | if (ch >= 0x80) \ | |
825 | ch = BYTE8_TO_CHAR (ch); \ | |
826 | CHAR_STRING_ADVANCE (ch, dst); \ | |
827 | ch = (c2); \ | |
828 | if (ch >= 0x80) \ | |
829 | ch = BYTE8_TO_CHAR (ch); \ | |
830 | CHAR_STRING_ADVANCE (ch, dst); \ | |
831 | } \ | |
832 | else \ | |
833 | { \ | |
834 | *dst++ = (c1); \ | |
835 | *dst++ = (c2); \ | |
836 | } \ | |
aa72b389 KH |
837 | } while (0) |
838 | ||
839 | ||
df7492f9 KH |
840 | #define EMIT_THREE_BYTES(c1, c2, c3) \ |
841 | do { \ | |
842 | EMIT_ONE_BYTE (c1); \ | |
843 | EMIT_TWO_BYTES (c2, c3); \ | |
844 | } while (0) | |
aa72b389 | 845 | |
aa72b389 | 846 | |
df7492f9 KH |
847 | #define EMIT_FOUR_BYTES(c1, c2, c3, c4) \ |
848 | do { \ | |
849 | EMIT_TWO_BYTES (c1, c2); \ | |
850 | EMIT_TWO_BYTES (c3, c4); \ | |
851 | } while (0) | |
aa72b389 | 852 | |
aa72b389 | 853 | |
df7492f9 KH |
854 | #define CODING_DECODE_CHAR(coding, src, src_base, src_end, charset, code, c) \ |
855 | do { \ | |
856 | charset_map_loaded = 0; \ | |
857 | c = DECODE_CHAR (charset, code); \ | |
858 | if (charset_map_loaded) \ | |
859 | { \ | |
860 | unsigned char *orig = coding->source; \ | |
861 | EMACS_INT offset; \ | |
862 | \ | |
863 | coding_set_source (coding); \ | |
864 | offset = coding->source - orig; \ | |
865 | src += offset; \ | |
866 | src_base += offset; \ | |
867 | src_end += offset; \ | |
868 | } \ | |
869 | } while (0) | |
aa72b389 | 870 | |
aa72b389 | 871 | |
df7492f9 KH |
872 | #define ASSURE_DESTINATION(bytes) \ |
873 | do { \ | |
874 | if (dst + (bytes) >= dst_end) \ | |
875 | { \ | |
876 | int more_bytes = charbuf_end - charbuf + (bytes); \ | |
877 | \ | |
878 | dst = alloc_destination (coding, more_bytes, dst); \ | |
879 | dst_end = coding->destination + coding->dst_bytes; \ | |
880 | } \ | |
881 | } while (0) | |
b1887814 | 882 | |
df7492f9 KH |
883 | |
884 | ||
885 | static void | |
886 | coding_set_source (coding) | |
887 | struct coding_system *coding; | |
888 | { | |
889 | if (BUFFERP (coding->src_object)) | |
890 | { | |
891 | if (coding->src_pos < 0) | |
892 | coding->source = GAP_END_ADDR + coding->src_pos_byte; | |
893 | else | |
894 | { | |
e19c3639 | 895 | struct buffer *buf = XBUFFER (coding->src_object); |
e19c3639 KH |
896 | EMACS_INT gpt_byte = BUF_GPT_BYTE (buf); |
897 | unsigned char *beg_addr = BUF_BEG_ADDR (buf); | |
898 | ||
899 | coding->source = beg_addr + coding->src_pos_byte - 1; | |
900 | if (coding->src_pos_byte >= gpt_byte) | |
901 | coding->source += BUF_GAP_SIZE (buf); | |
aa72b389 KH |
902 | } |
903 | } | |
df7492f9 | 904 | else if (STRINGP (coding->src_object)) |
aa72b389 | 905 | { |
df7492f9 KH |
906 | coding->source = (XSTRING (coding->src_object)->data |
907 | + coding->src_pos_byte); | |
908 | } | |
909 | else | |
910 | /* Otherwise, the source is C string and is never relocated | |
911 | automatically. Thus we don't have to update anything. */ | |
912 | ; | |
913 | } | |
914 | ||
915 | static void | |
916 | coding_set_destination (coding) | |
917 | struct coding_system *coding; | |
918 | { | |
919 | if (BUFFERP (coding->dst_object)) | |
920 | { | |
921 | /* We are sure that coding->dst_pos_byte is before the gap of the | |
922 | buffer. */ | |
923 | coding->destination = (BUF_BEG_ADDR (XBUFFER (coding->dst_object)) | |
924 | + coding->dst_pos_byte - 1); | |
925 | if (coding->src_pos < 0) | |
df7492f9 KH |
926 | coding->dst_bytes = (GAP_END_ADDR |
927 | - (coding->src_bytes - coding->consumed) | |
928 | - coding->destination); | |
929 | else | |
930 | coding->dst_bytes = (BUF_GAP_END_ADDR (XBUFFER (coding->dst_object)) | |
931 | - coding->destination); | |
932 | } | |
933 | else | |
934 | /* Otherwise, the destination is C string and is never relocated | |
935 | automatically. Thus we don't have to update anything. */ | |
936 | ; | |
937 | } | |
938 | ||
939 | ||
940 | static void | |
941 | coding_alloc_by_realloc (coding, bytes) | |
942 | struct coding_system *coding; | |
943 | EMACS_INT bytes; | |
944 | { | |
945 | coding->destination = (unsigned char *) xrealloc (coding->destination, | |
946 | coding->dst_bytes + bytes); | |
947 | coding->dst_bytes += bytes; | |
948 | } | |
949 | ||
950 | static void | |
951 | coding_alloc_by_making_gap (coding, bytes) | |
952 | struct coding_system *coding; | |
953 | EMACS_INT bytes; | |
954 | { | |
2c78b7e1 KH |
955 | if (BUFFERP (coding->dst_object) |
956 | && EQ (coding->src_object, coding->dst_object)) | |
df7492f9 KH |
957 | { |
958 | EMACS_INT add = coding->src_bytes - coding->consumed; | |
959 | ||
960 | GAP_SIZE -= add; ZV += add; Z += add; ZV_BYTE += add; Z_BYTE += add; | |
961 | make_gap (bytes); | |
962 | GAP_SIZE += add; ZV -= add; Z -= add; ZV_BYTE -= add; Z_BYTE -= add; | |
963 | } | |
964 | else | |
965 | { | |
2c78b7e1 KH |
966 | Lisp_Object this_buffer; |
967 | ||
968 | this_buffer = Fcurrent_buffer (); | |
df7492f9 KH |
969 | set_buffer_internal (XBUFFER (coding->dst_object)); |
970 | make_gap (bytes); | |
971 | set_buffer_internal (XBUFFER (this_buffer)); | |
972 | } | |
973 | } | |
974 | ||
975 | ||
976 | static unsigned char * | |
977 | alloc_destination (coding, nbytes, dst) | |
978 | struct coding_system *coding; | |
979 | int nbytes; | |
980 | unsigned char *dst; | |
981 | { | |
982 | EMACS_INT offset = dst - coding->destination; | |
983 | ||
984 | if (BUFFERP (coding->dst_object)) | |
985 | coding_alloc_by_making_gap (coding, nbytes); | |
986 | else | |
987 | coding_alloc_by_realloc (coding, nbytes); | |
988 | coding->result = CODING_RESULT_SUCCESS; | |
989 | coding_set_destination (coding); | |
990 | dst = coding->destination + offset; | |
991 | return dst; | |
992 | } | |
aa72b389 | 993 | |
df7492f9 KH |
994 | \f |
995 | /*** 2. Emacs' internal format (emacs-utf-8) ***/ | |
996 | ||
997 | ||
998 | ||
999 | \f | |
1000 | /*** 3. UTF-8 ***/ | |
1001 | ||
1002 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
1003 | Check if a text is encoded in UTF-8. If it is, return | |
1004 | CATEGORY_MASK_UTF_8, else return 0. */ | |
1005 | ||
1006 | #define UTF_8_1_OCTET_P(c) ((c) < 0x80) | |
1007 | #define UTF_8_EXTRA_OCTET_P(c) (((c) & 0xC0) == 0x80) | |
1008 | #define UTF_8_2_OCTET_LEADING_P(c) (((c) & 0xE0) == 0xC0) | |
1009 | #define UTF_8_3_OCTET_LEADING_P(c) (((c) & 0xF0) == 0xE0) | |
1010 | #define UTF_8_4_OCTET_LEADING_P(c) (((c) & 0xF8) == 0xF0) | |
1011 | #define UTF_8_5_OCTET_LEADING_P(c) (((c) & 0xFC) == 0xF8) | |
1012 | ||
1013 | static int | |
1014 | detect_coding_utf_8 (coding, mask) | |
1015 | struct coding_system *coding; | |
1016 | int *mask; | |
1017 | { | |
1018 | unsigned char *src = coding->source, *src_base = src; | |
1019 | unsigned char *src_end = coding->source + coding->src_bytes; | |
1020 | int multibytep = coding->src_multibyte; | |
1021 | int consumed_chars = 0; | |
1022 | int found = 0; | |
1023 | ||
1024 | /* A coding system of this category is always ASCII compatible. */ | |
1025 | src += coding->head_ascii; | |
1026 | ||
1027 | while (1) | |
1028 | { | |
1029 | int c, c1, c2, c3, c4; | |
1030 | ||
1031 | ONE_MORE_BYTE (c); | |
1032 | if (UTF_8_1_OCTET_P (c)) | |
1033 | continue; | |
1034 | ONE_MORE_BYTE (c1); | |
1035 | if (! UTF_8_EXTRA_OCTET_P (c1)) | |
1036 | break; | |
1037 | if (UTF_8_2_OCTET_LEADING_P (c)) | |
1038 | { | |
1039 | found++; | |
1040 | continue; | |
1041 | } | |
1042 | ONE_MORE_BYTE (c2); | |
1043 | if (! UTF_8_EXTRA_OCTET_P (c2)) | |
1044 | break; | |
1045 | if (UTF_8_3_OCTET_LEADING_P (c)) | |
1046 | { | |
1047 | found++; | |
1048 | continue; | |
1049 | } | |
1050 | ONE_MORE_BYTE (c3); | |
1051 | if (! UTF_8_EXTRA_OCTET_P (c3)) | |
1052 | break; | |
1053 | if (UTF_8_4_OCTET_LEADING_P (c)) | |
aa72b389 | 1054 | { |
df7492f9 KH |
1055 | found++; |
1056 | continue; | |
1057 | } | |
1058 | ONE_MORE_BYTE (c4); | |
1059 | if (! UTF_8_EXTRA_OCTET_P (c4)) | |
1060 | break; | |
1061 | if (UTF_8_5_OCTET_LEADING_P (c)) | |
1062 | { | |
1063 | found++; | |
1064 | continue; | |
1065 | } | |
1066 | break; | |
1067 | } | |
1068 | *mask &= ~CATEGORY_MASK_UTF_8; | |
1069 | return 0; | |
1070 | ||
1071 | no_more_source: | |
1072 | if (! found) | |
1073 | return 0; | |
1074 | *mask &= CATEGORY_MASK_UTF_8; | |
1075 | return 1; | |
1076 | } | |
1077 | ||
1078 | ||
1079 | static void | |
1080 | decode_coding_utf_8 (coding) | |
1081 | struct coding_system *coding; | |
1082 | { | |
1083 | unsigned char *src = coding->source + coding->consumed; | |
1084 | unsigned char *src_end = coding->source + coding->src_bytes; | |
1085 | unsigned char *src_base; | |
1086 | int *charbuf = coding->charbuf; | |
1087 | int *charbuf_end = charbuf + coding->charbuf_size; | |
1088 | int consumed_chars = 0, consumed_chars_base; | |
1089 | int multibytep = coding->src_multibyte; | |
1090 | Lisp_Object attr, eol_type, charset_list; | |
1091 | ||
1092 | CODING_GET_INFO (coding, attr, eol_type, charset_list); | |
1093 | ||
1094 | while (1) | |
1095 | { | |
1096 | int c, c1, c2, c3, c4, c5; | |
1097 | ||
1098 | src_base = src; | |
1099 | consumed_chars_base = consumed_chars; | |
1100 | ||
1101 | if (charbuf >= charbuf_end) | |
1102 | break; | |
1103 | ||
1104 | ONE_MORE_BYTE (c1); | |
1105 | if (UTF_8_1_OCTET_P(c1)) | |
1106 | { | |
1107 | c = c1; | |
1108 | if (c == '\r') | |
aa72b389 | 1109 | { |
df7492f9 KH |
1110 | if (EQ (eol_type, Qdos)) |
1111 | { | |
1112 | if (src == src_end) | |
1113 | goto no_more_source; | |
1114 | if (*src == '\n') | |
1115 | ONE_MORE_BYTE (c); | |
1116 | } | |
1117 | else if (EQ (eol_type, Qmac)) | |
1118 | c = '\n'; | |
aa72b389 | 1119 | } |
aa72b389 | 1120 | } |
df7492f9 | 1121 | else |
aa72b389 | 1122 | { |
df7492f9 KH |
1123 | ONE_MORE_BYTE (c2); |
1124 | if (! UTF_8_EXTRA_OCTET_P (c2)) | |
1125 | goto invalid_code; | |
1126 | if (UTF_8_2_OCTET_LEADING_P (c1)) | |
1127 | c = ((c1 & 0x1F) << 6) | (c2 & 0x3F); | |
1128 | else | |
aa72b389 | 1129 | { |
df7492f9 KH |
1130 | ONE_MORE_BYTE (c3); |
1131 | if (! UTF_8_EXTRA_OCTET_P (c3)) | |
1132 | goto invalid_code; | |
1133 | if (UTF_8_3_OCTET_LEADING_P (c1)) | |
1134 | c = (((c1 & 0xF) << 12) | |
1135 | | ((c2 & 0x3F) << 6) | (c3 & 0x3F)); | |
1136 | else | |
1137 | { | |
1138 | ONE_MORE_BYTE (c4); | |
1139 | if (! UTF_8_EXTRA_OCTET_P (c4)) | |
1140 | goto invalid_code; | |
1141 | if (UTF_8_4_OCTET_LEADING_P (c1)) | |
1142 | c = (((c1 & 0x7) << 18) | ((c2 & 0x3F) << 12) | |
1143 | | ((c3 & 0x3F) << 6) | (c4 & 0x3F)); | |
1144 | else | |
1145 | { | |
1146 | ONE_MORE_BYTE (c5); | |
1147 | if (! UTF_8_EXTRA_OCTET_P (c5)) | |
1148 | goto invalid_code; | |
1149 | if (UTF_8_5_OCTET_LEADING_P (c1)) | |
1150 | { | |
1151 | c = (((c1 & 0x3) << 24) | ((c2 & 0x3F) << 18) | |
1152 | | ((c3 & 0x3F) << 12) | ((c4 & 0x3F) << 6) | |
1153 | | (c5 & 0x3F)); | |
1154 | if (c > MAX_CHAR) | |
1155 | goto invalid_code; | |
1156 | } | |
1157 | else | |
1158 | goto invalid_code; | |
1159 | } | |
1160 | } | |
aa72b389 | 1161 | } |
aa72b389 | 1162 | } |
df7492f9 KH |
1163 | |
1164 | *charbuf++ = c; | |
1165 | continue; | |
1166 | ||
1167 | invalid_code: | |
1168 | src = src_base; | |
1169 | consumed_chars = consumed_chars_base; | |
1170 | ONE_MORE_BYTE (c); | |
1171 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
1172 | coding->errors++; | |
aa72b389 KH |
1173 | } |
1174 | ||
df7492f9 KH |
1175 | no_more_source: |
1176 | coding->consumed_char += consumed_chars_base; | |
1177 | coding->consumed = src_base - coding->source; | |
1178 | coding->charbuf_used = charbuf - coding->charbuf; | |
1179 | } | |
1180 | ||
1181 | ||
1182 | static int | |
1183 | encode_coding_utf_8 (coding) | |
1184 | struct coding_system *coding; | |
1185 | { | |
1186 | int multibytep = coding->dst_multibyte; | |
1187 | int *charbuf = coding->charbuf; | |
1188 | int *charbuf_end = charbuf + coding->charbuf_used; | |
1189 | unsigned char *dst = coding->destination + coding->produced; | |
1190 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
e19c3639 | 1191 | int produced_chars = 0; |
df7492f9 KH |
1192 | int c; |
1193 | ||
1194 | if (multibytep) | |
aa72b389 | 1195 | { |
df7492f9 KH |
1196 | int safe_room = MAX_MULTIBYTE_LENGTH * 2; |
1197 | ||
1198 | while (charbuf < charbuf_end) | |
aa72b389 | 1199 | { |
df7492f9 KH |
1200 | unsigned char str[MAX_MULTIBYTE_LENGTH], *p, *pend = str; |
1201 | ||
1202 | ASSURE_DESTINATION (safe_room); | |
1203 | c = *charbuf++; | |
1204 | CHAR_STRING_ADVANCE (c, pend); | |
1205 | for (p = str; p < pend; p++) | |
1206 | EMIT_ONE_BYTE (*p); | |
aa72b389 | 1207 | } |
aa72b389 | 1208 | } |
df7492f9 KH |
1209 | else |
1210 | { | |
1211 | int safe_room = MAX_MULTIBYTE_LENGTH; | |
1212 | ||
1213 | while (charbuf < charbuf_end) | |
1214 | { | |
1215 | ASSURE_DESTINATION (safe_room); | |
1216 | c = *charbuf++; | |
1217 | dst += CHAR_STRING (c, dst); | |
1218 | produced_chars++; | |
1219 | } | |
1220 | } | |
1221 | coding->result = CODING_RESULT_SUCCESS; | |
1222 | coding->produced_char += produced_chars; | |
1223 | coding->produced = dst - coding->destination; | |
1224 | return 0; | |
aa72b389 KH |
1225 | } |
1226 | ||
4ed46869 | 1227 | |
df7492f9 KH |
1228 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
1229 | Check if a text is encoded in UTF-16 Big Endian (endian == 1) or | |
1230 | Little Endian (otherwise). If it is, return | |
1231 | CATEGORY_MASK_UTF_16_BE or CATEGORY_MASK_UTF_16_LE, | |
1232 | else return 0. */ | |
1233 | ||
1234 | #define UTF_16_HIGH_SURROGATE_P(val) \ | |
1235 | (((val) & 0xFC00) == 0xD800) | |
1236 | ||
1237 | #define UTF_16_LOW_SURROGATE_P(val) \ | |
1238 | (((val) & 0xFC00) == 0xDC00) | |
1239 | ||
1240 | #define UTF_16_INVALID_P(val) \ | |
1241 | (((val) == 0xFFFE) \ | |
1242 | || ((val) == 0xFFFF) \ | |
1243 | || UTF_16_LOW_SURROGATE_P (val)) | |
1244 | ||
1245 | ||
1246 | static int | |
1247 | detect_coding_utf_16 (coding, mask) | |
b73bfc1c | 1248 | struct coding_system *coding; |
df7492f9 | 1249 | int *mask; |
b73bfc1c | 1250 | { |
df7492f9 KH |
1251 | unsigned char *src = coding->source, *src_base = src; |
1252 | unsigned char *src_end = coding->source + coding->src_bytes; | |
1253 | int multibytep = coding->src_multibyte; | |
1254 | int consumed_chars = 0; | |
1255 | int c1, c2; | |
1256 | ||
1257 | ONE_MORE_BYTE (c1); | |
1258 | ONE_MORE_BYTE (c2); | |
4ed46869 | 1259 | |
df7492f9 | 1260 | if ((c1 == 0xFF) && (c2 == 0xFE)) |
b73bfc1c | 1261 | { |
df7492f9 KH |
1262 | *mask &= CATEGORY_MASK_UTF_16_LE; |
1263 | return 1; | |
1264 | } | |
1265 | else if ((c1 == 0xFE) && (c2 == 0xFF)) | |
1266 | { | |
1267 | *mask &= CATEGORY_MASK_UTF_16_BE; | |
1268 | return 1; | |
1269 | } | |
1270 | no_more_source: | |
1271 | return 0; | |
1272 | } | |
ec6d2bb8 | 1273 | |
df7492f9 KH |
1274 | static void |
1275 | decode_coding_utf_16 (coding) | |
1276 | struct coding_system *coding; | |
1277 | { | |
1278 | unsigned char *src = coding->source + coding->consumed; | |
1279 | unsigned char *src_end = coding->source + coding->src_bytes; | |
0be8721c | 1280 | unsigned char *src_base; |
df7492f9 KH |
1281 | int *charbuf = coding->charbuf; |
1282 | int *charbuf_end = charbuf + coding->charbuf_size; | |
1283 | int consumed_chars = 0, consumed_chars_base; | |
1284 | int multibytep = coding->src_multibyte; | |
1285 | enum utf_16_bom_type bom = CODING_UTF_16_BOM (coding); | |
1286 | enum utf_16_endian_type endian = CODING_UTF_16_ENDIAN (coding); | |
1287 | int surrogate = CODING_UTF_16_SURROGATE (coding); | |
1288 | Lisp_Object attr, eol_type, charset_list; | |
1289 | ||
1290 | CODING_GET_INFO (coding, attr, eol_type, charset_list); | |
1291 | ||
1292 | if (bom != utf_16_without_bom) | |
1293 | { | |
1294 | int c, c1, c2; | |
4af310db | 1295 | |
df7492f9 KH |
1296 | src_base = src; |
1297 | ONE_MORE_BYTE (c1); | |
1298 | ONE_MORE_BYTE (c2); | |
e19c3639 | 1299 | c = (c1 << 8) | c2; |
df7492f9 KH |
1300 | if (bom == utf_16_with_bom) |
1301 | { | |
1302 | if (endian == utf_16_big_endian | |
1303 | ? c != 0xFFFE : c != 0xFEFF) | |
4af310db | 1304 | { |
df7492f9 KH |
1305 | /* We are sure that there's enouph room at CHARBUF. */ |
1306 | *charbuf++ = c1; | |
1307 | *charbuf++ = c2; | |
1308 | coding->errors++; | |
4af310db | 1309 | } |
4af310db | 1310 | } |
df7492f9 | 1311 | else |
4af310db | 1312 | { |
df7492f9 KH |
1313 | if (c == 0xFFFE) |
1314 | CODING_UTF_16_ENDIAN (coding) | |
1315 | = endian = utf_16_big_endian; | |
1316 | else if (c == 0xFEFF) | |
1317 | CODING_UTF_16_ENDIAN (coding) | |
1318 | = endian = utf_16_little_endian; | |
1319 | else | |
4af310db | 1320 | { |
df7492f9 KH |
1321 | CODING_UTF_16_ENDIAN (coding) |
1322 | = endian = utf_16_big_endian; | |
1323 | src = src_base; | |
4af310db | 1324 | } |
4af310db | 1325 | } |
df7492f9 KH |
1326 | CODING_UTF_16_BOM (coding) = utf_16_with_bom; |
1327 | } | |
1328 | ||
1329 | while (1) | |
1330 | { | |
1331 | int c, c1, c2; | |
1332 | ||
1333 | src_base = src; | |
1334 | consumed_chars_base = consumed_chars; | |
1335 | ||
1336 | if (charbuf + 2 >= charbuf_end) | |
1337 | break; | |
1338 | ||
1339 | ONE_MORE_BYTE (c1); | |
1340 | ONE_MORE_BYTE (c2); | |
1341 | c = (endian == utf_16_big_endian | |
e19c3639 | 1342 | ? ((c1 << 8) | c2) : ((c2 << 8) | c1)); |
df7492f9 | 1343 | if (surrogate) |
aa72b389 | 1344 | { |
df7492f9 | 1345 | if (! UTF_16_LOW_SURROGATE_P (c)) |
aa72b389 | 1346 | { |
df7492f9 KH |
1347 | if (endian == utf_16_big_endian) |
1348 | c1 = surrogate >> 8, c2 = surrogate & 0xFF; | |
1349 | else | |
1350 | c1 = surrogate & 0xFF, c2 = surrogate >> 8; | |
1351 | *charbuf++ = c1; | |
1352 | *charbuf++ = c2; | |
1353 | coding->errors++; | |
1354 | if (UTF_16_HIGH_SURROGATE_P (c)) | |
1355 | CODING_UTF_16_SURROGATE (coding) = surrogate = c; | |
1356 | else | |
1357 | *charbuf++ = c; | |
aa72b389 | 1358 | } |
df7492f9 KH |
1359 | else |
1360 | { | |
1361 | c = ((surrogate - 0xD800) << 10) | (c - 0xDC00); | |
1362 | CODING_UTF_16_SURROGATE (coding) = surrogate = 0; | |
1363 | *charbuf++ = c; | |
1364 | } | |
1365 | } | |
1366 | else | |
1367 | { | |
1368 | if (UTF_16_HIGH_SURROGATE_P (c)) | |
1369 | CODING_UTF_16_SURROGATE (coding) = surrogate = c; | |
1370 | else | |
1371 | *charbuf++ = c; | |
1372 | } | |
1373 | } | |
1374 | ||
1375 | no_more_source: | |
1376 | coding->consumed_char += consumed_chars_base; | |
1377 | coding->consumed = src_base - coding->source; | |
1378 | coding->charbuf_used = charbuf - coding->charbuf; | |
1379 | } | |
1380 | ||
1381 | static int | |
1382 | encode_coding_utf_16 (coding) | |
1383 | struct coding_system *coding; | |
1384 | { | |
1385 | int multibytep = coding->dst_multibyte; | |
1386 | int *charbuf = coding->charbuf; | |
1387 | int *charbuf_end = charbuf + coding->charbuf_used; | |
1388 | unsigned char *dst = coding->destination + coding->produced; | |
1389 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
1390 | int safe_room = 8; | |
1391 | enum utf_16_bom_type bom = CODING_UTF_16_BOM (coding); | |
1392 | int big_endian = CODING_UTF_16_ENDIAN (coding) == utf_16_big_endian; | |
1393 | int produced_chars = 0; | |
1394 | Lisp_Object attrs, eol_type, charset_list; | |
1395 | int c; | |
1396 | ||
1397 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
1398 | ||
1399 | if (bom == utf_16_with_bom) | |
1400 | { | |
1401 | ASSURE_DESTINATION (safe_room); | |
1402 | if (big_endian) | |
1403 | EMIT_TWO_BYTES (0xFF, 0xFE); | |
1404 | else | |
1405 | EMIT_TWO_BYTES (0xFE, 0xFF); | |
1406 | CODING_UTF_16_BOM (coding) = utf_16_without_bom; | |
1407 | } | |
1408 | ||
1409 | while (charbuf < charbuf_end) | |
1410 | { | |
1411 | ASSURE_DESTINATION (safe_room); | |
1412 | c = *charbuf++; | |
e19c3639 KH |
1413 | if (c >= MAX_UNICODE_CHAR) |
1414 | c = coding->default_char; | |
df7492f9 KH |
1415 | |
1416 | if (c < 0x10000) | |
1417 | { | |
1418 | if (big_endian) | |
1419 | EMIT_TWO_BYTES (c >> 8, c & 0xFF); | |
1420 | else | |
1421 | EMIT_TWO_BYTES (c & 0xFF, c >> 8); | |
1422 | } | |
1423 | else | |
1424 | { | |
1425 | int c1, c2; | |
1426 | ||
1427 | c -= 0x10000; | |
1428 | c1 = (c >> 10) + 0xD800; | |
1429 | c2 = (c & 0x3FF) + 0xDC00; | |
1430 | if (big_endian) | |
1431 | EMIT_FOUR_BYTES (c1 >> 8, c1 & 0xFF, c2 >> 8, c2 & 0xFF); | |
1432 | else | |
1433 | EMIT_FOUR_BYTES (c1 & 0xFF, c1 >> 8, c2 & 0xFF, c2 >> 8); | |
1434 | } | |
1435 | } | |
1436 | coding->result = CODING_RESULT_SUCCESS; | |
1437 | coding->produced = dst - coding->destination; | |
1438 | coding->produced_char += produced_chars; | |
1439 | return 0; | |
1440 | } | |
1441 | ||
1442 | \f | |
1443 | /*** 6. Old Emacs' internal format (emacs-mule) ***/ | |
1444 | ||
1445 | /* Emacs' internal format for representation of multiple character | |
1446 | sets is a kind of multi-byte encoding, i.e. characters are | |
1447 | represented by variable-length sequences of one-byte codes. | |
1448 | ||
1449 | ASCII characters and control characters (e.g. `tab', `newline') are | |
1450 | represented by one-byte sequences which are their ASCII codes, in | |
1451 | the range 0x00 through 0x7F. | |
1452 | ||
1453 | 8-bit characters of the range 0x80..0x9F are represented by | |
1454 | two-byte sequences of LEADING_CODE_8_BIT_CONTROL and (their 8-bit | |
1455 | code + 0x20). | |
1456 | ||
1457 | 8-bit characters of the range 0xA0..0xFF are represented by | |
1458 | one-byte sequences which are their 8-bit code. | |
1459 | ||
1460 | The other characters are represented by a sequence of `base | |
1461 | leading-code', optional `extended leading-code', and one or two | |
1462 | `position-code's. The length of the sequence is determined by the | |
1463 | base leading-code. Leading-code takes the range 0x81 through 0x9D, | |
1464 | whereas extended leading-code and position-code take the range 0xA0 | |
1465 | through 0xFF. See `charset.h' for more details about leading-code | |
1466 | and position-code. | |
1467 | ||
1468 | --- CODE RANGE of Emacs' internal format --- | |
1469 | character set range | |
1470 | ------------- ----- | |
1471 | ascii 0x00..0x7F | |
1472 | eight-bit-control LEADING_CODE_8_BIT_CONTROL + 0xA0..0xBF | |
1473 | eight-bit-graphic 0xA0..0xBF | |
1474 | ELSE 0x81..0x9D + [0xA0..0xFF]+ | |
1475 | --------------------------------------------- | |
1476 | ||
1477 | As this is the internal character representation, the format is | |
1478 | usually not used externally (i.e. in a file or in a data sent to a | |
1479 | process). But, it is possible to have a text externally in this | |
1480 | format (i.e. by encoding by the coding system `emacs-mule'). | |
1481 | ||
1482 | In that case, a sequence of one-byte codes has a slightly different | |
1483 | form. | |
1484 | ||
1485 | At first, all characters in eight-bit-control are represented by | |
1486 | one-byte sequences which are their 8-bit code. | |
1487 | ||
1488 | Next, character composition data are represented by the byte | |
1489 | sequence of the form: 0x80 METHOD BYTES CHARS COMPONENT ..., | |
1490 | where, | |
1491 | METHOD is 0xF0 plus one of composition method (enum | |
1492 | composition_method), | |
1493 | ||
1494 | BYTES is 0xA0 plus a byte length of this composition data, | |
1495 | ||
1496 | CHARS is 0x20 plus a number of characters composed by this | |
1497 | data, | |
1498 | ||
1499 | COMPONENTs are characters of multibye form or composition | |
1500 | rules encoded by two-byte of ASCII codes. | |
1501 | ||
1502 | In addition, for backward compatibility, the following formats are | |
1503 | also recognized as composition data on decoding. | |
1504 | ||
1505 | 0x80 MSEQ ... | |
1506 | 0x80 0xFF MSEQ RULE MSEQ RULE ... MSEQ | |
1507 | ||
1508 | Here, | |
1509 | MSEQ is a multibyte form but in these special format: | |
1510 | ASCII: 0xA0 ASCII_CODE+0x80, | |
1511 | other: LEADING_CODE+0x20 FOLLOWING-BYTE ..., | |
1512 | RULE is a one byte code of the range 0xA0..0xF0 that | |
1513 | represents a composition rule. | |
1514 | */ | |
1515 | ||
1516 | char emacs_mule_bytes[256]; | |
1517 | ||
1518 | /* Leading-code followed by extended leading-code. */ | |
1519 | #define LEADING_CODE_PRIVATE_11 0x9A /* for private DIMENSION1 of 1-column */ | |
1520 | #define LEADING_CODE_PRIVATE_12 0x9B /* for private DIMENSION1 of 2-column */ | |
1521 | #define LEADING_CODE_PRIVATE_21 0x9C /* for private DIMENSION2 of 1-column */ | |
1522 | #define LEADING_CODE_PRIVATE_22 0x9D /* for private DIMENSION2 of 2-column */ | |
1523 | ||
1524 | ||
1525 | int | |
1526 | emacs_mule_char (coding, composition, nbytes, nchars) | |
1527 | struct coding_system *coding; | |
1528 | int composition; | |
1529 | int *nbytes, *nchars; | |
1530 | { | |
1531 | unsigned char *src = coding->source + coding->consumed; | |
1532 | unsigned char *src_end = coding->source + coding->src_bytes; | |
1533 | int multibytep = coding->src_multibyte; | |
1534 | unsigned char *src_base = src; | |
1535 | struct charset *charset; | |
1536 | unsigned code; | |
1537 | int c; | |
1538 | int consumed_chars = 0; | |
1539 | ||
1540 | ONE_MORE_BYTE (c); | |
1541 | if (composition) | |
1542 | { | |
1543 | c -= 0x20; | |
1544 | if (c == 0x80) | |
1545 | { | |
1546 | ONE_MORE_BYTE (c); | |
1547 | if (c < 0xA0) | |
1548 | goto invalid_code; | |
1549 | *nbytes = src - src_base; | |
1550 | *nchars = consumed_chars; | |
1551 | return (c - 0x80); | |
aa72b389 | 1552 | } |
df7492f9 KH |
1553 | } |
1554 | ||
1555 | switch (emacs_mule_bytes[c]) | |
1556 | { | |
1557 | case 2: | |
1558 | if (! (charset = emacs_mule_charset[c])) | |
1559 | goto invalid_code; | |
1560 | ONE_MORE_BYTE (c); | |
1561 | code = c & 0x7F; | |
1562 | break; | |
1563 | ||
1564 | case 3: | |
1565 | if (c == LEADING_CODE_PRIVATE_11 | |
1566 | || c == LEADING_CODE_PRIVATE_12) | |
b73bfc1c | 1567 | { |
df7492f9 KH |
1568 | ONE_MORE_BYTE (c); |
1569 | if (! (charset = emacs_mule_charset[c])) | |
1570 | goto invalid_code; | |
1571 | ONE_MORE_BYTE (c); | |
1572 | code = c & 0x7F; | |
b73bfc1c KH |
1573 | } |
1574 | else | |
1575 | { | |
df7492f9 KH |
1576 | if (! (charset = emacs_mule_charset[c])) |
1577 | goto invalid_code; | |
1578 | ONE_MORE_BYTE (c); | |
1579 | code = (c & 0x7F) << 7; | |
1580 | ONE_MORE_BYTE (c); | |
1581 | code |= c & 0x7F; | |
1582 | } | |
1583 | break; | |
1584 | ||
1585 | case 4: | |
1586 | if (! (charset = emacs_mule_charset[c])) | |
1587 | goto invalid_code; | |
1588 | ONE_MORE_BYTE (c); | |
1589 | code = (c & 0x7F) << 7; | |
1590 | ONE_MORE_BYTE (c); | |
1591 | code |= c & 0x7F; | |
1592 | break; | |
1593 | ||
1594 | case 1: | |
1595 | code = c; | |
1596 | charset = CHARSET_FROM_ID (ASCII_BYTE_P (code) ? charset_ascii | |
1597 | : code < 0xA0 ? charset_8_bit_control | |
1598 | : charset_8_bit_graphic); | |
1599 | break; | |
1600 | ||
1601 | default: | |
1602 | abort (); | |
1603 | } | |
1604 | c = DECODE_CHAR (charset, code); | |
1605 | if (c < 0) | |
1606 | goto invalid_code; | |
1607 | *nbytes = src - src_base; | |
1608 | *nchars = consumed_chars; | |
1609 | return c; | |
1610 | ||
1611 | no_more_source: | |
1612 | return -2; | |
1613 | ||
1614 | invalid_code: | |
1615 | return -1; | |
1616 | } | |
1617 | ||
1618 | ||
1619 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
1620 | Check if a text is encoded in `emacs-mule'. */ | |
1621 | ||
1622 | static int | |
1623 | detect_coding_emacs_mule (coding, mask) | |
1624 | struct coding_system *coding; | |
1625 | int *mask; | |
1626 | { | |
1627 | unsigned char *src = coding->source, *src_base = src; | |
1628 | unsigned char *src_end = coding->source + coding->src_bytes; | |
1629 | int multibytep = coding->src_multibyte; | |
1630 | int consumed_chars = 0; | |
1631 | int c; | |
1632 | int found = 0; | |
1633 | ||
1634 | /* A coding system of this category is always ASCII compatible. */ | |
1635 | src += coding->head_ascii; | |
1636 | ||
1637 | while (1) | |
1638 | { | |
1639 | ONE_MORE_BYTE (c); | |
1640 | ||
1641 | if (c == 0x80) | |
1642 | { | |
1643 | /* Perhaps the start of composite character. We simple skip | |
1644 | it because analyzing it is too heavy for detecting. But, | |
1645 | at least, we check that the composite character | |
1646 | constitues of more than 4 bytes. */ | |
1647 | unsigned char *src_base; | |
1648 | ||
1649 | repeat: | |
1650 | src_base = src; | |
1651 | do | |
1652 | { | |
1653 | ONE_MORE_BYTE (c); | |
1654 | } | |
1655 | while (c >= 0xA0); | |
1656 | ||
1657 | if (src - src_base <= 4) | |
1658 | break; | |
1659 | found = 1; | |
1660 | if (c == 0x80) | |
1661 | goto repeat; | |
b73bfc1c | 1662 | } |
df7492f9 KH |
1663 | |
1664 | if (c < 0x80) | |
b73bfc1c | 1665 | { |
df7492f9 KH |
1666 | if (c < 0x20 |
1667 | && (c == ISO_CODE_ESC || c == ISO_CODE_SI || c == ISO_CODE_SO)) | |
1668 | break; | |
1669 | } | |
1670 | else | |
1671 | { | |
1672 | unsigned char *src_base = src - 1; | |
1673 | ||
1674 | do | |
1675 | { | |
1676 | ONE_MORE_BYTE (c); | |
1677 | } | |
1678 | while (c >= 0xA0); | |
1679 | if (src - src_base != emacs_mule_bytes[*src_base]) | |
1680 | break; | |
1681 | found = 1; | |
4ed46869 KH |
1682 | } |
1683 | } | |
df7492f9 KH |
1684 | *mask &= ~CATEGORY_MASK_EMACS_MULE; |
1685 | return 0; | |
1686 | ||
1687 | no_more_source: | |
1688 | if (!found) | |
1689 | return 0; | |
1690 | *mask &= CATEGORY_MASK_EMACS_MULE; | |
1691 | return 1; | |
4ed46869 KH |
1692 | } |
1693 | ||
b73bfc1c | 1694 | |
df7492f9 KH |
1695 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
1696 | ||
1697 | /* Decode a character represented as a component of composition | |
1698 | sequence of Emacs 20/21 style at SRC. Set C to that character and | |
1699 | update SRC to the head of next character (or an encoded composition | |
1700 | rule). If SRC doesn't points a composition component, set C to -1. | |
1701 | If SRC points an invalid byte sequence, global exit by a return | |
1702 | value 0. */ | |
1703 | ||
1704 | #define DECODE_EMACS_MULE_COMPOSITION_CHAR(buf) \ | |
1705 | if (1) \ | |
1706 | { \ | |
1707 | int c; \ | |
1708 | int nbytes, nchars; \ | |
1709 | \ | |
1710 | if (src == src_end) \ | |
1711 | break; \ | |
1712 | c = emacs_mule_char (coding, 1, &nbytes, &nchars); \ | |
1713 | if (c < 0) \ | |
1714 | { \ | |
1715 | if (c == -2) \ | |
1716 | break; \ | |
1717 | goto invalid_code; \ | |
1718 | } \ | |
1719 | *buf++ = c; \ | |
1720 | src += nbytes; \ | |
1721 | consumed_chars += nchars; \ | |
1722 | } \ | |
1723 | else | |
1724 | ||
1725 | ||
1726 | /* Decode a composition rule represented as a component of composition | |
1727 | sequence of Emacs 20 style at SRC. Set C to the rule. If SRC | |
1728 | points an invalid byte sequence, set C to -1. */ | |
1729 | ||
1730 | #define DECODE_EMACS_MULE_COMPOSITION_RULE(buf) \ | |
1731 | do { \ | |
1732 | int c, gref, nref; \ | |
1733 | \ | |
1734 | if (src < src_end) \ | |
1735 | goto invalid_code; \ | |
1736 | ONE_MORE_BYTE_NO_CHECK (c); \ | |
1737 | c -= 0xA0; \ | |
1738 | if (c < 0 || c >= 81) \ | |
1739 | goto invalid_code; \ | |
1740 | \ | |
1741 | gref = c / 9, nref = c % 9; \ | |
1742 | *buf++ = COMPOSITION_ENCODE_RULE (gref, nref); \ | |
1743 | } while (0) | |
1744 | ||
1745 | ||
1746 | #define ADD_COMPOSITION_DATA(buf, method, nchars) \ | |
1747 | do { \ | |
1748 | *buf++ = -5; \ | |
1749 | *buf++ = coding->produced_char + char_offset; \ | |
1750 | *buf++ = CODING_ANNOTATE_COMPOSITION_MASK; \ | |
1751 | *buf++ = method; \ | |
1752 | *buf++ = nchars; \ | |
1753 | } while (0) | |
aa72b389 | 1754 | |
df7492f9 KH |
1755 | |
1756 | #define DECODE_EMACS_MULE_21_COMPOSITION(c) \ | |
aa72b389 | 1757 | do { \ |
df7492f9 KH |
1758 | /* Emacs 21 style format. The first three bytes at SRC are \ |
1759 | (METHOD - 0xF0), (BYTES - 0xA0), (CHARS - 0xA0), where BYTES is \ | |
1760 | the byte length of this composition information, CHARS is the \ | |
1761 | number of characters composed by this composition. */ \ | |
1762 | enum composition_method method = c - 0xF0; \ | |
1763 | int consumed_chars_limit; \ | |
1764 | int nbytes, nchars; \ | |
1765 | \ | |
1766 | ONE_MORE_BYTE (c); \ | |
1767 | nbytes = c - 0xA0; \ | |
1768 | if (nbytes < 3) \ | |
1769 | goto invalid_code; \ | |
1770 | ONE_MORE_BYTE (c); \ | |
1771 | nchars = c - 0xA0; \ | |
1772 | ADD_COMPOSITION_DATA (charbuf, method, nchars); \ | |
1773 | consumed_chars_limit = consumed_chars_base + nbytes; \ | |
1774 | if (method != COMPOSITION_RELATIVE) \ | |
aa72b389 | 1775 | { \ |
df7492f9 KH |
1776 | int i = 0; \ |
1777 | while (consumed_chars < consumed_chars_limit) \ | |
aa72b389 | 1778 | { \ |
df7492f9 KH |
1779 | if (i % 2 && method != COMPOSITION_WITH_ALTCHARS) \ |
1780 | DECODE_EMACS_MULE_COMPOSITION_RULE (charbuf); \ | |
1781 | else \ | |
1782 | DECODE_EMACS_MULE_COMPOSITION_CHAR (charbuf); \ | |
aa72b389 | 1783 | } \ |
df7492f9 KH |
1784 | if (consumed_chars < consumed_chars_limit) \ |
1785 | goto invalid_code; \ | |
aa72b389 KH |
1786 | } \ |
1787 | } while (0) | |
93dec019 | 1788 | |
aa72b389 | 1789 | |
df7492f9 KH |
1790 | #define DECODE_EMACS_MULE_20_RELATIVE_COMPOSITION(c) \ |
1791 | do { \ | |
1792 | /* Emacs 20 style format for relative composition. */ \ | |
1793 | /* Store multibyte form of characters to be composed. */ \ | |
1794 | int components[MAX_COMPOSITION_COMPONENTS * 2 - 1]; \ | |
1795 | int *buf = components; \ | |
1796 | int i, j; \ | |
1797 | \ | |
1798 | src = src_base; \ | |
1799 | ONE_MORE_BYTE (c); /* skip 0x80 */ \ | |
1800 | for (i = 0; i < MAX_COMPOSITION_COMPONENTS; i++) \ | |
1801 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ | |
1802 | if (i < 2) \ | |
1803 | goto invalid_code; \ | |
1804 | ADD_COMPOSITION_DATA (charbuf, COMPOSITION_RELATIVE, i); \ | |
1805 | for (j = 0; j < i; j++) \ | |
1806 | *charbuf++ = components[j]; \ | |
1807 | } while (0) | |
1808 | ||
1809 | ||
1810 | #define DECODE_EMACS_MULE_20_RULEBASE_COMPOSITION(c) \ | |
1811 | do { \ | |
1812 | /* Emacs 20 style format for rule-base composition. */ \ | |
1813 | /* Store multibyte form of characters to be composed. */ \ | |
1814 | int components[MAX_COMPOSITION_COMPONENTS * 2 - 1]; \ | |
1815 | int *buf = components; \ | |
1816 | int i, j; \ | |
1817 | \ | |
1818 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ | |
1819 | for (i = 0; i < MAX_COMPOSITION_COMPONENTS; i++) \ | |
1820 | { \ | |
1821 | DECODE_EMACS_MULE_COMPOSITION_RULE (buf); \ | |
1822 | DECODE_EMACS_MULE_COMPOSITION_CHAR (buf); \ | |
1823 | } \ | |
1824 | if (i < 1 || (buf - components) % 2 == 0) \ | |
1825 | goto invalid_code; \ | |
1826 | if (charbuf + i + (i / 2) + 1 < charbuf_end) \ | |
1827 | goto no_more_source; \ | |
1828 | ADD_COMPOSITION_DATA (buf, COMPOSITION_WITH_RULE, i); \ | |
1829 | for (j = 0; j < i; j++) \ | |
1830 | *charbuf++ = components[j]; \ | |
1831 | for (j = 0; j < i; j += 2) \ | |
1832 | *charbuf++ = components[j]; \ | |
1833 | } while (0) | |
1834 | ||
aa72b389 KH |
1835 | |
1836 | static void | |
df7492f9 | 1837 | decode_coding_emacs_mule (coding) |
aa72b389 | 1838 | struct coding_system *coding; |
aa72b389 | 1839 | { |
df7492f9 KH |
1840 | unsigned char *src = coding->source + coding->consumed; |
1841 | unsigned char *src_end = coding->source + coding->src_bytes; | |
aa72b389 | 1842 | unsigned char *src_base; |
df7492f9 KH |
1843 | int *charbuf = coding->charbuf; |
1844 | int *charbuf_end = charbuf + coding->charbuf_size; | |
1845 | int consumed_chars = 0, consumed_chars_base; | |
1846 | int char_offset = 0; | |
1847 | int multibytep = coding->src_multibyte; | |
1848 | Lisp_Object attrs, eol_type, charset_list; | |
aa72b389 | 1849 | |
df7492f9 | 1850 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
aa72b389 | 1851 | |
aa72b389 KH |
1852 | while (1) |
1853 | { | |
df7492f9 KH |
1854 | int c; |
1855 | ||
aa72b389 | 1856 | src_base = src; |
df7492f9 KH |
1857 | consumed_chars_base = consumed_chars; |
1858 | ||
1859 | if (charbuf >= charbuf_end) | |
1860 | break; | |
aa72b389 | 1861 | |
df7492f9 KH |
1862 | ONE_MORE_BYTE (c); |
1863 | ||
1864 | if (c < 0x80) | |
aa72b389 | 1865 | { |
df7492f9 KH |
1866 | if (c == '\r') |
1867 | { | |
1868 | if (EQ (eol_type, Qdos)) | |
1869 | { | |
1870 | if (src == src_end) | |
1871 | goto no_more_source; | |
1872 | if (*src == '\n') | |
1873 | ONE_MORE_BYTE (c); | |
1874 | } | |
1875 | else if (EQ (eol_type, Qmac)) | |
1876 | c = '\n'; | |
1877 | } | |
1878 | *charbuf++ = c; | |
1879 | char_offset++; | |
aa72b389 | 1880 | } |
df7492f9 KH |
1881 | else if (c == 0x80) |
1882 | { | |
1883 | if (charbuf + 5 + (MAX_COMPOSITION_COMPONENTS * 2) - 1 > charbuf_end) | |
1884 | break; | |
1885 | ONE_MORE_BYTE (c); | |
1886 | if (c - 0xF0 >= COMPOSITION_RELATIVE | |
1887 | && c - 0xF0 <= COMPOSITION_WITH_RULE_ALTCHARS) | |
1888 | DECODE_EMACS_MULE_21_COMPOSITION (c); | |
1889 | else if (c < 0xC0) | |
1890 | DECODE_EMACS_MULE_20_RELATIVE_COMPOSITION (c); | |
1891 | else if (c == 0xFF) | |
1892 | DECODE_EMACS_MULE_20_RULEBASE_COMPOSITION (c); | |
1893 | else | |
1894 | goto invalid_code; | |
1895 | } | |
1896 | else if (c < 0xA0 && emacs_mule_bytes[c] > 1) | |
1897 | { | |
1898 | int nbytes, nchars; | |
1899 | src--; | |
1900 | c = emacs_mule_char (coding, 0, &nbytes, &nchars); | |
1901 | if (c < 0) | |
1902 | { | |
1903 | if (c == -2) | |
1904 | break; | |
1905 | goto invalid_code; | |
1906 | } | |
1907 | *charbuf++ = c; | |
1908 | char_offset++; | |
1909 | } | |
1910 | continue; | |
1911 | ||
1912 | invalid_code: | |
1913 | src = src_base; | |
1914 | consumed_chars = consumed_chars_base; | |
1915 | ONE_MORE_BYTE (c); | |
1916 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
1917 | coding->errors++; | |
1918 | } | |
1919 | ||
1920 | no_more_source: | |
1921 | coding->consumed_char += consumed_chars_base; | |
1922 | coding->consumed = src_base - coding->source; | |
1923 | coding->charbuf_used = charbuf - coding->charbuf; | |
1924 | } | |
1925 | ||
1926 | ||
1927 | #define EMACS_MULE_LEADING_CODES(id, codes) \ | |
1928 | do { \ | |
1929 | if (id < 0xA0) \ | |
1930 | codes[0] = id, codes[1] = 0; \ | |
1931 | else if (id < 0xE0) \ | |
1932 | codes[0] = 0x9A, codes[1] = id; \ | |
1933 | else if (id < 0xF0) \ | |
1934 | codes[0] = 0x9B, codes[1] = id; \ | |
1935 | else if (id < 0xF5) \ | |
1936 | codes[0] = 0x9C, codes[1] = id; \ | |
1937 | else \ | |
1938 | codes[0] = 0x9D, codes[1] = id; \ | |
1939 | } while (0); | |
1940 | ||
aa72b389 | 1941 | |
df7492f9 KH |
1942 | static int |
1943 | encode_coding_emacs_mule (coding) | |
1944 | struct coding_system *coding; | |
1945 | { | |
1946 | int multibytep = coding->dst_multibyte; | |
1947 | int *charbuf = coding->charbuf; | |
1948 | int *charbuf_end = charbuf + coding->charbuf_used; | |
1949 | unsigned char *dst = coding->destination + coding->produced; | |
1950 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
1951 | int safe_room = 8; | |
df7492f9 KH |
1952 | int produced_chars = 0; |
1953 | Lisp_Object attrs, eol_type, charset_list; | |
1954 | int c; | |
1955 | ||
1956 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
1957 | ||
1958 | while (charbuf < charbuf_end) | |
1959 | { | |
1960 | ASSURE_DESTINATION (safe_room); | |
1961 | c = *charbuf++; | |
1962 | if (ASCII_CHAR_P (c)) | |
1963 | EMIT_ONE_ASCII_BYTE (c); | |
1964 | else | |
aa72b389 | 1965 | { |
df7492f9 KH |
1966 | struct charset *charset; |
1967 | unsigned code; | |
1968 | int dimension; | |
1969 | int emacs_mule_id; | |
1970 | unsigned char leading_codes[2]; | |
1971 | ||
1972 | charset = char_charset (c, charset_list, &code); | |
1973 | if (! charset) | |
1974 | { | |
1975 | c = coding->default_char; | |
1976 | if (ASCII_CHAR_P (c)) | |
1977 | { | |
1978 | EMIT_ONE_ASCII_BYTE (c); | |
1979 | continue; | |
1980 | } | |
1981 | charset = char_charset (c, charset_list, &code); | |
1982 | } | |
1983 | dimension = CHARSET_DIMENSION (charset); | |
1984 | emacs_mule_id = CHARSET_EMACS_MULE_ID (charset); | |
1985 | EMACS_MULE_LEADING_CODES (emacs_mule_id, leading_codes); | |
1986 | EMIT_ONE_BYTE (leading_codes[0]); | |
1987 | if (leading_codes[1]) | |
1988 | EMIT_ONE_BYTE (leading_codes[1]); | |
1989 | if (dimension == 1) | |
1990 | EMIT_ONE_BYTE (code); | |
aa72b389 | 1991 | else |
df7492f9 KH |
1992 | { |
1993 | EMIT_ONE_BYTE (code >> 8); | |
1994 | EMIT_ONE_BYTE (code & 0xFF); | |
1995 | } | |
aa72b389 | 1996 | } |
aa72b389 | 1997 | } |
df7492f9 KH |
1998 | coding->result = CODING_RESULT_SUCCESS; |
1999 | coding->produced_char += produced_chars; | |
2000 | coding->produced = dst - coding->destination; | |
2001 | return 0; | |
aa72b389 | 2002 | } |
b73bfc1c | 2003 | |
4ed46869 | 2004 | \f |
df7492f9 | 2005 | /*** 7. ISO2022 handlers ***/ |
4ed46869 KH |
2006 | |
2007 | /* The following note describes the coding system ISO2022 briefly. | |
39787efd | 2008 | Since the intention of this note is to help understand the |
df7492f9 | 2009 | functions in this file, some parts are NOT ACCURATE or OVERLY |
39787efd | 2010 | SIMPLIFIED. For thorough understanding, please refer to the |
df7492f9 | 2011 | original document of ISO2022. |
4ed46869 KH |
2012 | |
2013 | ISO2022 provides many mechanisms to encode several character sets | |
df7492f9 | 2014 | in 7-bit and 8-bit environments. For 7-bite environments, all text |
39787efd KH |
2015 | is encoded using bytes less than 128. This may make the encoded |
2016 | text a little bit longer, but the text passes more easily through | |
df7492f9 | 2017 | several gateways, some of which strip off MSB (Most Signigant Bit). |
b73bfc1c | 2018 | |
df7492f9 KH |
2019 | There are two kinds of character sets: control character set and |
2020 | graphic character set. The former contains control characters such | |
4ed46869 | 2021 | as `newline' and `escape' to provide control functions (control |
39787efd | 2022 | functions are also provided by escape sequences). The latter |
df7492f9 | 2023 | contains graphic characters such as 'A' and '-'. Emacs recognizes |
4ed46869 KH |
2024 | two control character sets and many graphic character sets. |
2025 | ||
2026 | Graphic character sets are classified into one of the following | |
39787efd KH |
2027 | four classes, according to the number of bytes (DIMENSION) and |
2028 | number of characters in one dimension (CHARS) of the set: | |
2029 | - DIMENSION1_CHARS94 | |
2030 | - DIMENSION1_CHARS96 | |
2031 | - DIMENSION2_CHARS94 | |
2032 | - DIMENSION2_CHARS96 | |
2033 | ||
2034 | In addition, each character set is assigned an identification tag, | |
df7492f9 | 2035 | unique for each set, called "final character" (denoted as <F> |
39787efd KH |
2036 | hereafter). The <F> of each character set is decided by ECMA(*) |
2037 | when it is registered in ISO. The code range of <F> is 0x30..0x7F | |
2038 | (0x30..0x3F are for private use only). | |
4ed46869 KH |
2039 | |
2040 | Note (*): ECMA = European Computer Manufacturers Association | |
2041 | ||
df7492f9 | 2042 | Here are examples of graphic character set [NAME(<F>)]: |
4ed46869 KH |
2043 | o DIMENSION1_CHARS94 -- ASCII('B'), right-half-of-JISX0201('I'), ... |
2044 | o DIMENSION1_CHARS96 -- right-half-of-ISO8859-1('A'), ... | |
2045 | o DIMENSION2_CHARS94 -- GB2312('A'), JISX0208('B'), ... | |
2046 | o DIMENSION2_CHARS96 -- none for the moment | |
2047 | ||
39787efd | 2048 | A code area (1 byte=8 bits) is divided into 4 areas, C0, GL, C1, and GR. |
4ed46869 KH |
2049 | C0 [0x00..0x1F] -- control character plane 0 |
2050 | GL [0x20..0x7F] -- graphic character plane 0 | |
2051 | C1 [0x80..0x9F] -- control character plane 1 | |
2052 | GR [0xA0..0xFF] -- graphic character plane 1 | |
2053 | ||
2054 | A control character set is directly designated and invoked to C0 or | |
39787efd KH |
2055 | C1 by an escape sequence. The most common case is that: |
2056 | - ISO646's control character set is designated/invoked to C0, and | |
2057 | - ISO6429's control character set is designated/invoked to C1, | |
2058 | and usually these designations/invocations are omitted in encoded | |
2059 | text. In a 7-bit environment, only C0 can be used, and a control | |
2060 | character for C1 is encoded by an appropriate escape sequence to | |
2061 | fit into the environment. All control characters for C1 are | |
2062 | defined to have corresponding escape sequences. | |
4ed46869 KH |
2063 | |
2064 | A graphic character set is at first designated to one of four | |
2065 | graphic registers (G0 through G3), then these graphic registers are | |
2066 | invoked to GL or GR. These designations and invocations can be | |
2067 | done independently. The most common case is that G0 is invoked to | |
39787efd KH |
2068 | GL, G1 is invoked to GR, and ASCII is designated to G0. Usually |
2069 | these invocations and designations are omitted in encoded text. | |
2070 | In a 7-bit environment, only GL can be used. | |
4ed46869 | 2071 | |
39787efd KH |
2072 | When a graphic character set of CHARS94 is invoked to GL, codes |
2073 | 0x20 and 0x7F of the GL area work as control characters SPACE and | |
2074 | DEL respectively, and codes 0xA0 and 0xFF of the GR area should not | |
2075 | be used. | |
4ed46869 KH |
2076 | |
2077 | There are two ways of invocation: locking-shift and single-shift. | |
2078 | With locking-shift, the invocation lasts until the next different | |
39787efd KH |
2079 | invocation, whereas with single-shift, the invocation affects the |
2080 | following character only and doesn't affect the locking-shift | |
2081 | state. Invocations are done by the following control characters or | |
2082 | escape sequences: | |
4ed46869 KH |
2083 | |
2084 | ---------------------------------------------------------------------- | |
39787efd | 2085 | abbrev function cntrl escape seq description |
4ed46869 | 2086 | ---------------------------------------------------------------------- |
39787efd KH |
2087 | SI/LS0 (shift-in) 0x0F none invoke G0 into GL |
2088 | SO/LS1 (shift-out) 0x0E none invoke G1 into GL | |
2089 | LS2 (locking-shift-2) none ESC 'n' invoke G2 into GL | |
2090 | LS3 (locking-shift-3) none ESC 'o' invoke G3 into GL | |
2091 | LS1R (locking-shift-1 right) none ESC '~' invoke G1 into GR (*) | |
2092 | LS2R (locking-shift-2 right) none ESC '}' invoke G2 into GR (*) | |
2093 | LS3R (locking-shift 3 right) none ESC '|' invoke G3 into GR (*) | |
2094 | SS2 (single-shift-2) 0x8E ESC 'N' invoke G2 for one char | |
2095 | SS3 (single-shift-3) 0x8F ESC 'O' invoke G3 for one char | |
4ed46869 | 2096 | ---------------------------------------------------------------------- |
39787efd KH |
2097 | (*) These are not used by any known coding system. |
2098 | ||
2099 | Control characters for these functions are defined by macros | |
2100 | ISO_CODE_XXX in `coding.h'. | |
4ed46869 | 2101 | |
39787efd | 2102 | Designations are done by the following escape sequences: |
4ed46869 KH |
2103 | ---------------------------------------------------------------------- |
2104 | escape sequence description | |
2105 | ---------------------------------------------------------------------- | |
2106 | ESC '(' <F> designate DIMENSION1_CHARS94<F> to G0 | |
2107 | ESC ')' <F> designate DIMENSION1_CHARS94<F> to G1 | |
2108 | ESC '*' <F> designate DIMENSION1_CHARS94<F> to G2 | |
2109 | ESC '+' <F> designate DIMENSION1_CHARS94<F> to G3 | |
2110 | ESC ',' <F> designate DIMENSION1_CHARS96<F> to G0 (*) | |
2111 | ESC '-' <F> designate DIMENSION1_CHARS96<F> to G1 | |
2112 | ESC '.' <F> designate DIMENSION1_CHARS96<F> to G2 | |
2113 | ESC '/' <F> designate DIMENSION1_CHARS96<F> to G3 | |
2114 | ESC '$' '(' <F> designate DIMENSION2_CHARS94<F> to G0 (**) | |
2115 | ESC '$' ')' <F> designate DIMENSION2_CHARS94<F> to G1 | |
2116 | ESC '$' '*' <F> designate DIMENSION2_CHARS94<F> to G2 | |
2117 | ESC '$' '+' <F> designate DIMENSION2_CHARS94<F> to G3 | |
2118 | ESC '$' ',' <F> designate DIMENSION2_CHARS96<F> to G0 (*) | |
2119 | ESC '$' '-' <F> designate DIMENSION2_CHARS96<F> to G1 | |
2120 | ESC '$' '.' <F> designate DIMENSION2_CHARS96<F> to G2 | |
2121 | ESC '$' '/' <F> designate DIMENSION2_CHARS96<F> to G3 | |
2122 | ---------------------------------------------------------------------- | |
2123 | ||
2124 | In this list, "DIMENSION1_CHARS94<F>" means a graphic character set | |
39787efd | 2125 | of dimension 1, chars 94, and final character <F>, etc... |
4ed46869 KH |
2126 | |
2127 | Note (*): Although these designations are not allowed in ISO2022, | |
2128 | Emacs accepts them on decoding, and produces them on encoding | |
39787efd | 2129 | CHARS96 character sets in a coding system which is characterized as |
4ed46869 KH |
2130 | 7-bit environment, non-locking-shift, and non-single-shift. |
2131 | ||
2132 | Note (**): If <F> is '@', 'A', or 'B', the intermediate character | |
df7492f9 | 2133 | '(' must be omitted. We refer to this as "short-form" hereafter. |
4ed46869 | 2134 | |
df7492f9 | 2135 | Now you may notice that there are a lot of ways for encoding the |
39787efd KH |
2136 | same multilingual text in ISO2022. Actually, there exist many |
2137 | coding systems such as Compound Text (used in X11's inter client | |
df7492f9 KH |
2138 | communication, ISO-2022-JP (used in Japanese internet), ISO-2022-KR |
2139 | (used in Korean internet), EUC (Extended UNIX Code, used in Asian | |
4ed46869 KH |
2140 | localized platforms), and all of these are variants of ISO2022. |
2141 | ||
2142 | In addition to the above, Emacs handles two more kinds of escape | |
2143 | sequences: ISO6429's direction specification and Emacs' private | |
2144 | sequence for specifying character composition. | |
2145 | ||
39787efd | 2146 | ISO6429's direction specification takes the following form: |
4ed46869 KH |
2147 | o CSI ']' -- end of the current direction |
2148 | o CSI '0' ']' -- end of the current direction | |
2149 | o CSI '1' ']' -- start of left-to-right text | |
2150 | o CSI '2' ']' -- start of right-to-left text | |
2151 | The control character CSI (0x9B: control sequence introducer) is | |
39787efd KH |
2152 | abbreviated to the escape sequence ESC '[' in a 7-bit environment. |
2153 | ||
2154 | Character composition specification takes the following form: | |
ec6d2bb8 KH |
2155 | o ESC '0' -- start relative composition |
2156 | o ESC '1' -- end composition | |
2157 | o ESC '2' -- start rule-base composition (*) | |
2158 | o ESC '3' -- start relative composition with alternate chars (**) | |
2159 | o ESC '4' -- start rule-base composition with alternate chars (**) | |
b73bfc1c | 2160 | Since these are not standard escape sequences of any ISO standard, |
df7492f9 | 2161 | the use of them for these meaning is restricted to Emacs only. |
ec6d2bb8 | 2162 | |
df7492f9 | 2163 | (*) This form is used only in Emacs 20.5 and the older versions, |
b73bfc1c | 2164 | but the newer versions can safely decode it. |
df7492f9 | 2165 | (**) This form is used only in Emacs 21.1 and the newer versions, |
b73bfc1c | 2166 | and the older versions can't decode it. |
ec6d2bb8 | 2167 | |
df7492f9 | 2168 | Here's a list of examples usages of these composition escape |
b73bfc1c | 2169 | sequences (categorized by `enum composition_method'). |
ec6d2bb8 | 2170 | |
b73bfc1c | 2171 | COMPOSITION_RELATIVE: |
ec6d2bb8 | 2172 | ESC 0 CHAR [ CHAR ] ESC 1 |
df7492f9 | 2173 | COMPOSITOIN_WITH_RULE: |
ec6d2bb8 | 2174 | ESC 2 CHAR [ RULE CHAR ] ESC 1 |
b73bfc1c | 2175 | COMPOSITION_WITH_ALTCHARS: |
ec6d2bb8 | 2176 | ESC 3 ALTCHAR [ ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 |
b73bfc1c | 2177 | COMPOSITION_WITH_RULE_ALTCHARS: |
ec6d2bb8 | 2178 | ESC 4 ALTCHAR [ RULE ALTCHAR ] ESC 0 CHAR [ CHAR ] ESC 1 */ |
4ed46869 KH |
2179 | |
2180 | enum iso_code_class_type iso_code_class[256]; | |
2181 | ||
df7492f9 KH |
2182 | #define SAFE_CHARSET_P(coding, id) \ |
2183 | ((id) <= (coding)->max_charset_id \ | |
2184 | && (coding)->safe_charsets[id] >= 0) | |
2185 | ||
2186 | ||
2187 | #define SHIFT_OUT_OK(category) \ | |
2188 | (CODING_ISO_INITIAL (&coding_categories[category], 1) >= 0) | |
2189 | ||
2190 | static void | |
2191 | setup_iso_safe_charsets (Lisp_Object attrs) | |
2192 | { | |
2193 | Lisp_Object charset_list, safe_charsets; | |
2194 | Lisp_Object request; | |
2195 | Lisp_Object reg_usage; | |
2196 | Lisp_Object tail; | |
2197 | int reg94, reg96; | |
2198 | int flags = XINT (AREF (attrs, coding_attr_iso_flags)); | |
2199 | int max_charset_id; | |
2200 | ||
2201 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
2202 | if ((flags & CODING_ISO_FLAG_FULL_SUPPORT) | |
2203 | && ! EQ (charset_list, Viso_2022_charset_list)) | |
2204 | { | |
2205 | CODING_ATTR_CHARSET_LIST (attrs) | |
2206 | = charset_list = Viso_2022_charset_list; | |
2207 | ASET (attrs, coding_attr_safe_charsets, Qnil); | |
2208 | } | |
2209 | ||
2210 | if (STRINGP (AREF (attrs, coding_attr_safe_charsets))) | |
2211 | return; | |
2212 | ||
2213 | max_charset_id = 0; | |
2214 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
2215 | { | |
2216 | int id = XINT (XCAR (tail)); | |
2217 | if (max_charset_id < id) | |
2218 | max_charset_id = id; | |
2219 | } | |
2220 | ||
2221 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), | |
2222 | make_number (255)); | |
2223 | request = AREF (attrs, coding_attr_iso_request); | |
2224 | reg_usage = AREF (attrs, coding_attr_iso_usage); | |
2225 | reg94 = XINT (XCAR (reg_usage)); | |
2226 | reg96 = XINT (XCDR (reg_usage)); | |
2227 | ||
2228 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
2229 | { | |
2230 | Lisp_Object id; | |
2231 | Lisp_Object reg; | |
2232 | struct charset *charset; | |
2233 | ||
2234 | id = XCAR (tail); | |
2235 | charset = CHARSET_FROM_ID (XINT (id)); | |
2236 | reg = Fcdr (Fassq (request, id)); | |
2237 | if (! NILP (reg)) | |
2238 | XSTRING (safe_charsets)->data[XINT (id)] = XINT (reg); | |
2239 | else if (charset->iso_chars_96) | |
2240 | { | |
2241 | if (reg96 < 4) | |
2242 | XSTRING (safe_charsets)->data[XINT (id)] = reg96; | |
2243 | } | |
2244 | else | |
2245 | { | |
2246 | if (reg94 < 4) | |
2247 | XSTRING (safe_charsets)->data[XINT (id)] = reg94; | |
2248 | } | |
2249 | } | |
2250 | ASET (attrs, coding_attr_safe_charsets, safe_charsets); | |
2251 | } | |
d46c5b12 | 2252 | |
d46c5b12 | 2253 | |
4ed46869 | 2254 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". |
df7492f9 | 2255 | Check if a text is encoded in ISO2022. If it is, returns an |
4ed46869 | 2256 | integer in which appropriate flag bits any of: |
df7492f9 KH |
2257 | CATEGORY_MASK_ISO_7 |
2258 | CATEGORY_MASK_ISO_7_TIGHT | |
2259 | CATEGORY_MASK_ISO_8_1 | |
2260 | CATEGORY_MASK_ISO_8_2 | |
2261 | CATEGORY_MASK_ISO_7_ELSE | |
2262 | CATEGORY_MASK_ISO_8_ELSE | |
4ed46869 KH |
2263 | are set. If a code which should never appear in ISO2022 is found, |
2264 | returns 0. */ | |
2265 | ||
0a28aafb | 2266 | static int |
df7492f9 KH |
2267 | detect_coding_iso_2022 (coding, mask) |
2268 | struct coding_system *coding; | |
2269 | int *mask; | |
4ed46869 | 2270 | { |
df7492f9 KH |
2271 | unsigned char *src = coding->source, *src_base = src; |
2272 | unsigned char *src_end = coding->source + coding->src_bytes; | |
2273 | int multibytep = coding->src_multibyte; | |
2274 | int mask_iso = CATEGORY_MASK_ISO; | |
2275 | int mask_found = 0, mask_8bit_found = 0; | |
f46869e4 | 2276 | int reg[4], shift_out = 0, single_shifting = 0; |
df7492f9 KH |
2277 | int id; |
2278 | int c, c1; | |
2279 | int consumed_chars = 0; | |
2280 | int i; | |
2281 | ||
2282 | for (i = coding_category_iso_7; i <= coding_category_iso_8_else; i++) | |
2283 | { | |
2284 | struct coding_system *this = &(coding_categories[i]); | |
2285 | Lisp_Object attrs, val; | |
2286 | ||
2287 | attrs = CODING_ID_ATTRS (this->id); | |
2288 | if (CODING_ISO_FLAGS (this) & CODING_ISO_FLAG_FULL_SUPPORT | |
2289 | && ! EQ (CODING_ATTR_SAFE_CHARSETS (attrs), Viso_2022_charset_list)) | |
2290 | setup_iso_safe_charsets (attrs); | |
2291 | val = CODING_ATTR_SAFE_CHARSETS (attrs); | |
2292 | this->max_charset_id = XSTRING (val)->size - 1; | |
2293 | this->safe_charsets = (char *) XSTRING (val)->data; | |
2294 | } | |
2295 | ||
2296 | /* A coding system of this category is always ASCII compatible. */ | |
2297 | src += coding->head_ascii; | |
3f003981 | 2298 | |
df7492f9 KH |
2299 | reg[0] = charset_ascii, reg[1] = reg[2] = reg[3] = -1; |
2300 | while (mask_iso && src < src_end) | |
4ed46869 | 2301 | { |
df7492f9 | 2302 | ONE_MORE_BYTE (c); |
4ed46869 KH |
2303 | switch (c) |
2304 | { | |
2305 | case ISO_CODE_ESC: | |
74383408 KH |
2306 | if (inhibit_iso_escape_detection) |
2307 | break; | |
f46869e4 | 2308 | single_shifting = 0; |
df7492f9 | 2309 | ONE_MORE_BYTE (c); |
d46c5b12 | 2310 | if (c >= '(' && c <= '/') |
4ed46869 | 2311 | { |
bf9cdd4e | 2312 | /* Designation sequence for a charset of dimension 1. */ |
df7492f9 | 2313 | ONE_MORE_BYTE (c1); |
d46c5b12 | 2314 | if (c1 < ' ' || c1 >= 0x80 |
df7492f9 | 2315 | || (id = iso_charset_table[0][c >= ','][c1]) < 0) |
d46c5b12 KH |
2316 | /* Invalid designation sequence. Just ignore. */ |
2317 | break; | |
df7492f9 | 2318 | reg[(c - '(') % 4] = id; |
bf9cdd4e KH |
2319 | } |
2320 | else if (c == '$') | |
2321 | { | |
2322 | /* Designation sequence for a charset of dimension 2. */ | |
df7492f9 | 2323 | ONE_MORE_BYTE (c); |
bf9cdd4e KH |
2324 | if (c >= '@' && c <= 'B') |
2325 | /* Designation for JISX0208.1978, GB2312, or JISX0208. */ | |
df7492f9 | 2326 | reg[0] = id = iso_charset_table[1][0][c]; |
bf9cdd4e | 2327 | else if (c >= '(' && c <= '/') |
bcf26d6a | 2328 | { |
df7492f9 | 2329 | ONE_MORE_BYTE (c1); |
d46c5b12 | 2330 | if (c1 < ' ' || c1 >= 0x80 |
df7492f9 | 2331 | || (id = iso_charset_table[1][c >= ','][c1]) < 0) |
d46c5b12 KH |
2332 | /* Invalid designation sequence. Just ignore. */ |
2333 | break; | |
df7492f9 | 2334 | reg[(c - '(') % 4] = id; |
bcf26d6a | 2335 | } |
bf9cdd4e | 2336 | else |
d46c5b12 KH |
2337 | /* Invalid designation sequence. Just ignore. */ |
2338 | break; | |
2339 | } | |
ae9ff118 | 2340 | else if (c == 'N' || c == 'O') |
d46c5b12 | 2341 | { |
ae9ff118 | 2342 | /* ESC <Fe> for SS2 or SS3. */ |
df7492f9 | 2343 | mask_iso &= CATEGORY_MASK_ISO_7_ELSE; |
d46c5b12 | 2344 | break; |
4ed46869 | 2345 | } |
ec6d2bb8 KH |
2346 | else if (c >= '0' && c <= '4') |
2347 | { | |
2348 | /* ESC <Fp> for start/end composition. */ | |
df7492f9 | 2349 | mask_found |= CATEGORY_MASK_ISO; |
ec6d2bb8 KH |
2350 | break; |
2351 | } | |
bf9cdd4e | 2352 | else |
df7492f9 KH |
2353 | { |
2354 | /* Invalid escape sequence. */ | |
2355 | mask_iso &= ~CATEGORY_MASK_ISO_ESCAPE; | |
2356 | break; | |
2357 | } | |
d46c5b12 KH |
2358 | |
2359 | /* We found a valid designation sequence for CHARSET. */ | |
df7492f9 KH |
2360 | mask_iso &= ~CATEGORY_MASK_ISO_8BIT; |
2361 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7], | |
2362 | id)) | |
2363 | mask_found |= CATEGORY_MASK_ISO_7; | |
d46c5b12 | 2364 | else |
df7492f9 KH |
2365 | mask_iso &= ~CATEGORY_MASK_ISO_7; |
2366 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7_tight], | |
2367 | id)) | |
2368 | mask_found |= CATEGORY_MASK_ISO_7_TIGHT; | |
d46c5b12 | 2369 | else |
df7492f9 KH |
2370 | mask_iso &= ~CATEGORY_MASK_ISO_7_TIGHT; |
2371 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_7_else], | |
2372 | id)) | |
2373 | mask_found |= CATEGORY_MASK_ISO_7_ELSE; | |
ae9ff118 | 2374 | else |
df7492f9 KH |
2375 | mask_iso &= ~CATEGORY_MASK_ISO_7_ELSE; |
2376 | if (SAFE_CHARSET_P (&coding_categories[coding_category_iso_8_else], | |
2377 | id)) | |
2378 | mask_found |= CATEGORY_MASK_ISO_8_ELSE; | |
ae9ff118 | 2379 | else |
df7492f9 | 2380 | mask_iso &= ~CATEGORY_MASK_ISO_8_ELSE; |
4ed46869 KH |
2381 | break; |
2382 | ||
4ed46869 | 2383 | case ISO_CODE_SO: |
74383408 KH |
2384 | if (inhibit_iso_escape_detection) |
2385 | break; | |
f46869e4 | 2386 | single_shifting = 0; |
d46c5b12 KH |
2387 | if (shift_out == 0 |
2388 | && (reg[1] >= 0 | |
df7492f9 KH |
2389 | || SHIFT_OUT_OK (coding_category_iso_7_else) |
2390 | || SHIFT_OUT_OK (coding_category_iso_8_else))) | |
d46c5b12 KH |
2391 | { |
2392 | /* Locking shift out. */ | |
df7492f9 KH |
2393 | mask_iso &= ~CATEGORY_MASK_ISO_7BIT; |
2394 | mask_found |= CATEGORY_MASK_ISO_ELSE; | |
d46c5b12 | 2395 | } |
e0e989f6 | 2396 | break; |
df7492f9 | 2397 | |
d46c5b12 | 2398 | case ISO_CODE_SI: |
74383408 KH |
2399 | if (inhibit_iso_escape_detection) |
2400 | break; | |
f46869e4 | 2401 | single_shifting = 0; |
d46c5b12 KH |
2402 | if (shift_out == 1) |
2403 | { | |
2404 | /* Locking shift in. */ | |
df7492f9 KH |
2405 | mask_iso &= ~CATEGORY_MASK_ISO_7BIT; |
2406 | mask_found |= CATEGORY_MASK_ISO_ELSE; | |
d46c5b12 KH |
2407 | } |
2408 | break; | |
2409 | ||
4ed46869 | 2410 | case ISO_CODE_CSI: |
f46869e4 | 2411 | single_shifting = 0; |
4ed46869 KH |
2412 | case ISO_CODE_SS2: |
2413 | case ISO_CODE_SS3: | |
3f003981 | 2414 | { |
df7492f9 | 2415 | int newmask = CATEGORY_MASK_ISO_8_ELSE; |
3f003981 | 2416 | |
74383408 KH |
2417 | if (inhibit_iso_escape_detection) |
2418 | break; | |
70c22245 KH |
2419 | if (c != ISO_CODE_CSI) |
2420 | { | |
df7492f9 KH |
2421 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_1]) |
2422 | & CODING_ISO_FLAG_SINGLE_SHIFT) | |
2423 | newmask |= CATEGORY_MASK_ISO_8_1; | |
2424 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_2]) | |
2425 | & CODING_ISO_FLAG_SINGLE_SHIFT) | |
2426 | newmask |= CATEGORY_MASK_ISO_8_2; | |
f46869e4 | 2427 | single_shifting = 1; |
70c22245 | 2428 | } |
3f003981 KH |
2429 | if (VECTORP (Vlatin_extra_code_table) |
2430 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
2431 | { | |
df7492f9 KH |
2432 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_1]) |
2433 | & CODING_ISO_FLAG_LATIN_EXTRA) | |
2434 | newmask |= CATEGORY_MASK_ISO_8_1; | |
2435 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_2]) | |
2436 | & CODING_ISO_FLAG_LATIN_EXTRA) | |
2437 | newmask |= CATEGORY_MASK_ISO_8_2; | |
3f003981 | 2438 | } |
df7492f9 | 2439 | mask_iso &= newmask; |
d46c5b12 | 2440 | mask_found |= newmask; |
3f003981 KH |
2441 | } |
2442 | break; | |
4ed46869 KH |
2443 | |
2444 | default: | |
2445 | if (c < 0x80) | |
f46869e4 KH |
2446 | { |
2447 | single_shifting = 0; | |
2448 | break; | |
2449 | } | |
4ed46869 | 2450 | else if (c < 0xA0) |
c4825358 | 2451 | { |
f46869e4 | 2452 | single_shifting = 0; |
df7492f9 | 2453 | mask_8bit_found = 1; |
3f003981 KH |
2454 | if (VECTORP (Vlatin_extra_code_table) |
2455 | && !NILP (XVECTOR (Vlatin_extra_code_table)->contents[c])) | |
c4825358 | 2456 | { |
3f003981 KH |
2457 | int newmask = 0; |
2458 | ||
df7492f9 KH |
2459 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_1]) |
2460 | & CODING_ISO_FLAG_LATIN_EXTRA) | |
2461 | newmask |= CATEGORY_MASK_ISO_8_1; | |
2462 | if (CODING_ISO_FLAGS (&coding_categories[coding_category_iso_8_2]) | |
2463 | & CODING_ISO_FLAG_LATIN_EXTRA) | |
2464 | newmask |= CATEGORY_MASK_ISO_8_2; | |
2465 | mask_iso &= newmask; | |
d46c5b12 | 2466 | mask_found |= newmask; |
c4825358 | 2467 | } |
3f003981 KH |
2468 | else |
2469 | return 0; | |
c4825358 | 2470 | } |
4ed46869 KH |
2471 | else |
2472 | { | |
df7492f9 KH |
2473 | mask_iso &= ~(CATEGORY_MASK_ISO_7BIT |
2474 | | CATEGORY_MASK_ISO_7_ELSE); | |
2475 | mask_found |= CATEGORY_MASK_ISO_8_1; | |
2476 | mask_8bit_found = 1; | |
f46869e4 KH |
2477 | /* Check the length of succeeding codes of the range |
2478 | 0xA0..0FF. If the byte length is odd, we exclude | |
df7492f9 | 2479 | CATEGORY_MASK_ISO_8_2. We can check this only |
f46869e4 | 2480 | when we are not single shifting. */ |
b73bfc1c | 2481 | if (!single_shifting |
df7492f9 | 2482 | && mask_iso & CATEGORY_MASK_ISO_8_2) |
f46869e4 | 2483 | { |
e17de821 | 2484 | int i = 1; |
b73bfc1c KH |
2485 | while (src < src_end) |
2486 | { | |
df7492f9 | 2487 | ONE_MORE_BYTE (c); |
b73bfc1c KH |
2488 | if (c < 0xA0) |
2489 | break; | |
2490 | i++; | |
2491 | } | |
2492 | ||
2493 | if (i & 1 && src < src_end) | |
df7492f9 | 2494 | mask_iso &= ~CATEGORY_MASK_ISO_8_2; |
f46869e4 | 2495 | else |
df7492f9 | 2496 | mask_found |= CATEGORY_MASK_ISO_8_2; |
f46869e4 | 2497 | } |
4ed46869 KH |
2498 | } |
2499 | break; | |
2500 | } | |
2501 | } | |
df7492f9 KH |
2502 | no_more_source: |
2503 | if (!mask_iso) | |
2504 | { | |
2505 | *mask &= ~CATEGORY_MASK_ISO; | |
2506 | return 0; | |
2507 | } | |
2508 | if (!mask_found) | |
2509 | return 0; | |
2510 | *mask &= mask_iso & mask_found; | |
2511 | if (! mask_8bit_found) | |
2512 | *mask &= ~(CATEGORY_MASK_ISO_8BIT | CATEGORY_MASK_ISO_8_ELSE); | |
2513 | return 1; | |
4ed46869 KH |
2514 | } |
2515 | ||
4ed46869 KH |
2516 | |
2517 | /* Set designation state into CODING. */ | |
df7492f9 KH |
2518 | #define DECODE_DESIGNATION(reg, dim, chars_96, final) \ |
2519 | do { \ | |
2520 | int id, prev; \ | |
2521 | \ | |
2522 | if (final < '0' || final >= 128 \ | |
2523 | || ((id = ISO_CHARSET_TABLE (dim, chars_96, final)) < 0) \ | |
2524 | || !SAFE_CHARSET_P (coding, id)) \ | |
2525 | { \ | |
2526 | CODING_ISO_DESIGNATION (coding, reg) = -2; \ | |
2527 | goto invalid_code; \ | |
2528 | } \ | |
2529 | prev = CODING_ISO_DESIGNATION (coding, reg); \ | |
2530 | CODING_ISO_DESIGNATION (coding, reg) = id; \ | |
2531 | /* If there was an invalid designation to REG previously, and this \ | |
2532 | designation is ASCII to REG, we should keep this designation \ | |
2533 | sequence. */ \ | |
2534 | if (prev == -2 && id == charset_ascii) \ | |
2535 | goto invalid_code; \ | |
4ed46869 KH |
2536 | } while (0) |
2537 | ||
d46c5b12 | 2538 | |
df7492f9 KH |
2539 | #define MAYBE_FINISH_COMPOSITION() \ |
2540 | do { \ | |
2541 | int i; \ | |
2542 | if (composition_state == COMPOSING_NO) \ | |
2543 | break; \ | |
2544 | /* It is assured that we have enough room for producing \ | |
2545 | characters stored in the table `components'. */ \ | |
2546 | if (charbuf + component_idx > charbuf_end) \ | |
2547 | goto no_more_source; \ | |
2548 | composition_state = COMPOSING_NO; \ | |
2549 | if (method == COMPOSITION_RELATIVE \ | |
2550 | || method == COMPOSITION_WITH_ALTCHARS) \ | |
2551 | { \ | |
2552 | for (i = 0; i < component_idx; i++) \ | |
2553 | *charbuf++ = components[i]; \ | |
2554 | char_offset += component_idx; \ | |
2555 | } \ | |
2556 | else \ | |
2557 | { \ | |
2558 | for (i = 0; i < component_idx; i += 2) \ | |
2559 | *charbuf++ = components[i]; \ | |
2560 | char_offset += (component_idx / 2) + 1; \ | |
2561 | } \ | |
2562 | } while (0) | |
2563 | ||
d46c5b12 | 2564 | |
aa72b389 KH |
2565 | /* Handle composition start sequence ESC 0, ESC 2, ESC 3, or ESC 4. |
2566 | ESC 0 : relative composition : ESC 0 CHAR ... ESC 1 | |
2567 | ESC 2 : rulebase composition : ESC 2 CHAR RULE CHAR RULE ... CHAR ESC 1 | |
df7492f9 KH |
2568 | ESC 3 : altchar composition : ESC 3 CHAR ... ESC 0 CHAR ... ESC 1 |
2569 | ESC 4 : alt&rule composition : ESC 4 CHAR RULE ... CHAR ESC 0 CHAR ... ESC 1 | |
aa72b389 | 2570 | */ |
ec6d2bb8 | 2571 | |
df7492f9 KH |
2572 | #define DECODE_COMPOSITION_START(c1) \ |
2573 | do { \ | |
2574 | if (c1 == '0' \ | |
2575 | && composition_state == COMPOSING_COMPONENT_CHAR) \ | |
2576 | { \ | |
2577 | component_len = component_idx; \ | |
2578 | composition_state = COMPOSING_CHAR; \ | |
2579 | } \ | |
2580 | else \ | |
2581 | { \ | |
2582 | unsigned char *p; \ | |
2583 | \ | |
2584 | MAYBE_FINISH_COMPOSITION (); \ | |
2585 | if (charbuf + MAX_COMPOSITION_COMPONENTS > charbuf_end) \ | |
2586 | goto no_more_source; \ | |
2587 | for (p = src; p < src_end - 1; p++) \ | |
2588 | if (*p == ISO_CODE_ESC && p[1] == '1') \ | |
2589 | break; \ | |
2590 | if (p == src_end - 1) \ | |
2591 | { \ | |
2592 | if (coding->mode & CODING_MODE_LAST_BLOCK) \ | |
2593 | goto invalid_code; \ | |
2594 | goto no_more_source; \ | |
2595 | } \ | |
2596 | \ | |
2597 | /* This is surely the start of a composition. */ \ | |
2598 | method = (c1 == '0' ? COMPOSITION_RELATIVE \ | |
2599 | : c1 == '2' ? COMPOSITION_WITH_RULE \ | |
2600 | : c1 == '3' ? COMPOSITION_WITH_ALTCHARS \ | |
2601 | : COMPOSITION_WITH_RULE_ALTCHARS); \ | |
2602 | composition_state = (c1 <= '2' ? COMPOSING_CHAR \ | |
2603 | : COMPOSING_COMPONENT_CHAR); \ | |
2604 | component_idx = component_len = 0; \ | |
2605 | } \ | |
ec6d2bb8 KH |
2606 | } while (0) |
2607 | ||
ec6d2bb8 | 2608 | |
df7492f9 KH |
2609 | /* Handle compositoin end sequence ESC 1. */ |
2610 | ||
2611 | #define DECODE_COMPOSITION_END() \ | |
ec6d2bb8 | 2612 | do { \ |
df7492f9 KH |
2613 | int nchars = (component_len > 0 ? component_idx - component_len \ |
2614 | : method == COMPOSITION_RELATIVE ? component_idx \ | |
2615 | : (component_idx + 1) / 2); \ | |
2616 | int i; \ | |
2617 | int *saved_charbuf = charbuf; \ | |
2618 | \ | |
2619 | ADD_COMPOSITION_DATA (charbuf, method, nchars); \ | |
2620 | if (method != COMPOSITION_RELATIVE) \ | |
ec6d2bb8 | 2621 | { \ |
df7492f9 KH |
2622 | if (component_len == 0) \ |
2623 | for (i = 0; i < component_idx; i++) \ | |
2624 | *charbuf++ = components[i]; \ | |
2625 | else \ | |
2626 | for (i = 0; i < component_len; i++) \ | |
2627 | *charbuf++ = components[i]; \ | |
2628 | *saved_charbuf = saved_charbuf - charbuf; \ | |
ec6d2bb8 | 2629 | } \ |
df7492f9 KH |
2630 | if (method == COMPOSITION_WITH_RULE) \ |
2631 | for (i = 0; i < component_idx; i += 2, char_offset++) \ | |
2632 | *charbuf++ = components[i]; \ | |
ec6d2bb8 | 2633 | else \ |
df7492f9 KH |
2634 | for (i = component_len; i < component_idx; i++, char_offset++) \ |
2635 | *charbuf++ = components[i]; \ | |
2636 | coding->annotated = 1; \ | |
2637 | composition_state = COMPOSING_NO; \ | |
ec6d2bb8 KH |
2638 | } while (0) |
2639 | ||
df7492f9 | 2640 | |
ec6d2bb8 KH |
2641 | /* Decode a composition rule from the byte C1 (and maybe one more byte |
2642 | from SRC) and store one encoded composition rule in | |
2643 | coding->cmp_data. */ | |
2644 | ||
2645 | #define DECODE_COMPOSITION_RULE(c1) \ | |
2646 | do { \ | |
ec6d2bb8 KH |
2647 | (c1) -= 32; \ |
2648 | if (c1 < 81) /* old format (before ver.21) */ \ | |
2649 | { \ | |
2650 | int gref = (c1) / 9; \ | |
2651 | int nref = (c1) % 9; \ | |
2652 | if (gref == 4) gref = 10; \ | |
2653 | if (nref == 4) nref = 10; \ | |
df7492f9 | 2654 | c1 = COMPOSITION_ENCODE_RULE (gref, nref); \ |
ec6d2bb8 | 2655 | } \ |
b73bfc1c | 2656 | else if (c1 < 93) /* new format (after ver.21) */ \ |
ec6d2bb8 KH |
2657 | { \ |
2658 | ONE_MORE_BYTE (c2); \ | |
df7492f9 | 2659 | c1 = COMPOSITION_ENCODE_RULE (c1 - 81, c2 - 32); \ |
ec6d2bb8 | 2660 | } \ |
df7492f9 KH |
2661 | else \ |
2662 | c1 = 0; \ | |
ec6d2bb8 | 2663 | } while (0) |
88993dfd | 2664 | |
d46c5b12 | 2665 | |
4ed46869 KH |
2666 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ |
2667 | ||
b73bfc1c | 2668 | static void |
df7492f9 | 2669 | decode_coding_iso_2022 (coding) |
4ed46869 | 2670 | struct coding_system *coding; |
4ed46869 | 2671 | { |
df7492f9 KH |
2672 | unsigned char *src = coding->source + coding->consumed; |
2673 | unsigned char *src_end = coding->source + coding->src_bytes; | |
b73bfc1c | 2674 | unsigned char *src_base; |
df7492f9 KH |
2675 | int *charbuf = coding->charbuf; |
2676 | int *charbuf_end = charbuf + coding->charbuf_size - 4; | |
2677 | int consumed_chars = 0, consumed_chars_base; | |
2678 | int char_offset = 0; | |
2679 | int multibytep = coding->src_multibyte; | |
2680 | /* Charsets invoked to graphic plane 0 and 1 respectively. */ | |
2681 | int charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
2682 | int charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
2683 | struct charset *charset; | |
2684 | int c; | |
2685 | /* For handling composition sequence. */ | |
2686 | #define COMPOSING_NO 0 | |
2687 | #define COMPOSING_CHAR 1 | |
2688 | #define COMPOSING_RULE 2 | |
2689 | #define COMPOSING_COMPONENT_CHAR 3 | |
2690 | #define COMPOSING_COMPONENT_RULE 4 | |
2691 | ||
2692 | int composition_state = COMPOSING_NO; | |
2693 | enum composition_method method; | |
2694 | int components[MAX_COMPOSITION_COMPONENTS * 2 + 1]; | |
2695 | int component_idx; | |
2696 | int component_len; | |
2697 | Lisp_Object attrs, eol_type, charset_list; | |
2698 | ||
2699 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
2700 | setup_iso_safe_charsets (attrs); | |
b73bfc1c KH |
2701 | |
2702 | while (1) | |
4ed46869 | 2703 | { |
b73bfc1c KH |
2704 | int c1, c2; |
2705 | ||
2706 | src_base = src; | |
df7492f9 KH |
2707 | consumed_chars_base = consumed_chars; |
2708 | ||
2709 | if (charbuf >= charbuf_end) | |
2710 | break; | |
2711 | ||
b73bfc1c | 2712 | ONE_MORE_BYTE (c1); |
4ed46869 | 2713 | |
ec6d2bb8 | 2714 | /* We produce no character or one character. */ |
4ed46869 KH |
2715 | switch (iso_code_class [c1]) |
2716 | { | |
2717 | case ISO_0x20_or_0x7F: | |
df7492f9 | 2718 | if (composition_state != COMPOSING_NO) |
ec6d2bb8 | 2719 | { |
df7492f9 KH |
2720 | if (composition_state == COMPOSING_RULE |
2721 | || composition_state == COMPOSING_COMPONENT_RULE) | |
2722 | { | |
2723 | DECODE_COMPOSITION_RULE (c1); | |
2724 | components[component_idx++] = c1; | |
2725 | composition_state--; | |
2726 | continue; | |
2727 | } | |
2728 | else if (method == COMPOSITION_WITH_RULE) | |
2729 | composition_state = COMPOSING_RULE; | |
2730 | else if (method == COMPOSITION_WITH_RULE_ALTCHARS | |
2731 | && composition_state == COMPOSING_COMPONENT_CHAR) | |
2732 | composition_state = COMPOSING_COMPONENT_CHAR; | |
ec6d2bb8 | 2733 | } |
df7492f9 KH |
2734 | if (charset_id_0 < 0 |
2735 | || ! CHARSET_ISO_CHARS_96 (CHARSET_FROM_ID (charset_id_0))) | |
4ed46869 KH |
2736 | { |
2737 | /* This is SPACE or DEL. */ | |
df7492f9 | 2738 | charset = CHARSET_FROM_ID (charset_ascii); |
4ed46869 KH |
2739 | break; |
2740 | } | |
2741 | /* This is a graphic character, we fall down ... */ | |
2742 | ||
2743 | case ISO_graphic_plane_0: | |
df7492f9 | 2744 | if (composition_state == COMPOSING_RULE) |
b73bfc1c KH |
2745 | { |
2746 | DECODE_COMPOSITION_RULE (c1); | |
df7492f9 KH |
2747 | components[component_idx++] = c1; |
2748 | composition_state = COMPOSING_CHAR; | |
b73bfc1c | 2749 | } |
df7492f9 | 2750 | charset = CHARSET_FROM_ID (charset_id_0); |
4ed46869 KH |
2751 | break; |
2752 | ||
2753 | case ISO_0xA0_or_0xFF: | |
df7492f9 KH |
2754 | if (charset_id_1 < 0 |
2755 | || ! CHARSET_ISO_CHARS_96 (CHARSET_FROM_ID (charset_id_1)) | |
2756 | || CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) | |
2757 | goto invalid_code; | |
4ed46869 KH |
2758 | /* This is a graphic character, we fall down ... */ |
2759 | ||
2760 | case ISO_graphic_plane_1: | |
df7492f9 KH |
2761 | if (charset_id_1 < 0) |
2762 | goto invalid_code; | |
2763 | charset = CHARSET_FROM_ID (charset_id_1); | |
4ed46869 KH |
2764 | break; |
2765 | ||
2766 | case ISO_carriage_return: | |
df7492f9 | 2767 | if (c1 == '\r') |
4ed46869 | 2768 | { |
df7492f9 | 2769 | if (EQ (eol_type, Qdos)) |
4ed46869 | 2770 | { |
df7492f9 KH |
2771 | if (src == src_end) |
2772 | goto no_more_source; | |
2773 | if (*src == '\n') | |
2774 | ONE_MORE_BYTE (c1); | |
4ed46869 | 2775 | } |
df7492f9 KH |
2776 | else if (EQ (eol_type, Qmac)) |
2777 | c1 = '\n'; | |
4ed46869 | 2778 | } |
df7492f9 KH |
2779 | /* fall through */ |
2780 | ||
2781 | case ISO_control_0: | |
2782 | MAYBE_FINISH_COMPOSITION (); | |
2783 | charset = CHARSET_FROM_ID (charset_ascii); | |
4ed46869 KH |
2784 | break; |
2785 | ||
df7492f9 KH |
2786 | case ISO_control_1: |
2787 | MAYBE_FINISH_COMPOSITION (); | |
2788 | goto invalid_code; | |
2789 | ||
4ed46869 | 2790 | case ISO_shift_out: |
df7492f9 KH |
2791 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
2792 | || CODING_ISO_DESIGNATION (coding, 1) < 0) | |
2793 | goto invalid_code; | |
2794 | CODING_ISO_INVOCATION (coding, 0) = 1; | |
2795 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 2796 | continue; |
4ed46869 KH |
2797 | |
2798 | case ISO_shift_in: | |
df7492f9 KH |
2799 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT)) |
2800 | goto invalid_code; | |
2801 | CODING_ISO_INVOCATION (coding, 0) = 0; | |
2802 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 2803 | continue; |
4ed46869 KH |
2804 | |
2805 | case ISO_single_shift_2_7: | |
2806 | case ISO_single_shift_2: | |
df7492f9 KH |
2807 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT)) |
2808 | goto invalid_code; | |
4ed46869 KH |
2809 | /* SS2 is handled as an escape sequence of ESC 'N' */ |
2810 | c1 = 'N'; | |
2811 | goto label_escape_sequence; | |
2812 | ||
2813 | case ISO_single_shift_3: | |
df7492f9 KH |
2814 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT)) |
2815 | goto invalid_code; | |
4ed46869 KH |
2816 | /* SS2 is handled as an escape sequence of ESC 'O' */ |
2817 | c1 = 'O'; | |
2818 | goto label_escape_sequence; | |
2819 | ||
2820 | case ISO_control_sequence_introducer: | |
2821 | /* CSI is handled as an escape sequence of ESC '[' ... */ | |
2822 | c1 = '['; | |
2823 | goto label_escape_sequence; | |
2824 | ||
2825 | case ISO_escape: | |
2826 | ONE_MORE_BYTE (c1); | |
2827 | label_escape_sequence: | |
df7492f9 | 2828 | /* Escape sequences handled here are invocation, |
4ed46869 KH |
2829 | designation, direction specification, and character |
2830 | composition specification. */ | |
2831 | switch (c1) | |
2832 | { | |
2833 | case '&': /* revision of following character set */ | |
2834 | ONE_MORE_BYTE (c1); | |
2835 | if (!(c1 >= '@' && c1 <= '~')) | |
df7492f9 | 2836 | goto invalid_code; |
4ed46869 KH |
2837 | ONE_MORE_BYTE (c1); |
2838 | if (c1 != ISO_CODE_ESC) | |
df7492f9 | 2839 | goto invalid_code; |
4ed46869 KH |
2840 | ONE_MORE_BYTE (c1); |
2841 | goto label_escape_sequence; | |
2842 | ||
2843 | case '$': /* designation of 2-byte character set */ | |
df7492f9 KH |
2844 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATION)) |
2845 | goto invalid_code; | |
4ed46869 KH |
2846 | ONE_MORE_BYTE (c1); |
2847 | if (c1 >= '@' && c1 <= 'B') | |
2848 | { /* designation of JISX0208.1978, GB2312.1980, | |
88993dfd | 2849 | or JISX0208.1980 */ |
df7492f9 | 2850 | DECODE_DESIGNATION (0, 2, 0, c1); |
4ed46869 KH |
2851 | } |
2852 | else if (c1 >= 0x28 && c1 <= 0x2B) | |
2853 | { /* designation of DIMENSION2_CHARS94 character set */ | |
2854 | ONE_MORE_BYTE (c2); | |
df7492f9 | 2855 | DECODE_DESIGNATION (c1 - 0x28, 2, 0, c2); |
4ed46869 KH |
2856 | } |
2857 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
2858 | { /* designation of DIMENSION2_CHARS96 character set */ | |
2859 | ONE_MORE_BYTE (c2); | |
df7492f9 | 2860 | DECODE_DESIGNATION (c1 - 0x2C, 2, 1, c2); |
4ed46869 KH |
2861 | } |
2862 | else | |
df7492f9 | 2863 | goto invalid_code; |
b73bfc1c | 2864 | /* We must update these variables now. */ |
df7492f9 KH |
2865 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); |
2866 | charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
b73bfc1c | 2867 | continue; |
4ed46869 KH |
2868 | |
2869 | case 'n': /* invocation of locking-shift-2 */ | |
df7492f9 KH |
2870 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
2871 | || CODING_ISO_DESIGNATION (coding, 2) < 0) | |
2872 | goto invalid_code; | |
2873 | CODING_ISO_INVOCATION (coding, 0) = 2; | |
2874 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 2875 | continue; |
4ed46869 KH |
2876 | |
2877 | case 'o': /* invocation of locking-shift-3 */ | |
df7492f9 KH |
2878 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LOCKING_SHIFT) |
2879 | || CODING_ISO_DESIGNATION (coding, 3) < 0) | |
2880 | goto invalid_code; | |
2881 | CODING_ISO_INVOCATION (coding, 0) = 3; | |
2882 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); | |
b73bfc1c | 2883 | continue; |
4ed46869 KH |
2884 | |
2885 | case 'N': /* invocation of single-shift-2 */ | |
df7492f9 KH |
2886 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
2887 | || CODING_ISO_DESIGNATION (coding, 2) < 0) | |
2888 | goto invalid_code; | |
2889 | charset = CHARSET_FROM_ID (CODING_ISO_DESIGNATION (coding, 2)); | |
b73bfc1c | 2890 | ONE_MORE_BYTE (c1); |
e7046a18 | 2891 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
df7492f9 | 2892 | goto invalid_code; |
4ed46869 KH |
2893 | break; |
2894 | ||
2895 | case 'O': /* invocation of single-shift-3 */ | |
df7492f9 KH |
2896 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
2897 | || CODING_ISO_DESIGNATION (coding, 3) < 0) | |
2898 | goto invalid_code; | |
2899 | charset = CHARSET_FROM_ID (CODING_ISO_DESIGNATION (coding, 3)); | |
b73bfc1c | 2900 | ONE_MORE_BYTE (c1); |
e7046a18 | 2901 | if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0)) |
df7492f9 | 2902 | goto invalid_code; |
4ed46869 KH |
2903 | break; |
2904 | ||
ec6d2bb8 | 2905 | case '0': case '2': case '3': case '4': /* start composition */ |
df7492f9 KH |
2906 | if (! (coding->common_flags & CODING_ANNOTATE_COMPOSITION_MASK)) |
2907 | goto invalid_code; | |
ec6d2bb8 | 2908 | DECODE_COMPOSITION_START (c1); |
b73bfc1c | 2909 | continue; |
4ed46869 | 2910 | |
ec6d2bb8 | 2911 | case '1': /* end composition */ |
df7492f9 KH |
2912 | if (composition_state == COMPOSING_NO) |
2913 | goto invalid_code; | |
2914 | DECODE_COMPOSITION_END (); | |
b73bfc1c | 2915 | continue; |
4ed46869 KH |
2916 | |
2917 | case '[': /* specification of direction */ | |
df7492f9 KH |
2918 | if (! CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DIRECTION) |
2919 | goto invalid_code; | |
4ed46869 | 2920 | /* For the moment, nested direction is not supported. |
d46c5b12 | 2921 | So, `coding->mode & CODING_MODE_DIRECTION' zero means |
df7492f9 | 2922 | left-to-right, and nozero means right-to-left. */ |
4ed46869 KH |
2923 | ONE_MORE_BYTE (c1); |
2924 | switch (c1) | |
2925 | { | |
2926 | case ']': /* end of the current direction */ | |
d46c5b12 | 2927 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 KH |
2928 | |
2929 | case '0': /* end of the current direction */ | |
2930 | case '1': /* start of left-to-right direction */ | |
2931 | ONE_MORE_BYTE (c1); | |
2932 | if (c1 == ']') | |
d46c5b12 | 2933 | coding->mode &= ~CODING_MODE_DIRECTION; |
4ed46869 | 2934 | else |
df7492f9 | 2935 | goto invalid_code; |
4ed46869 KH |
2936 | break; |
2937 | ||
2938 | case '2': /* start of right-to-left direction */ | |
2939 | ONE_MORE_BYTE (c1); | |
2940 | if (c1 == ']') | |
d46c5b12 | 2941 | coding->mode |= CODING_MODE_DIRECTION; |
4ed46869 | 2942 | else |
df7492f9 | 2943 | goto invalid_code; |
4ed46869 KH |
2944 | break; |
2945 | ||
2946 | default: | |
df7492f9 | 2947 | goto invalid_code; |
4ed46869 | 2948 | } |
b73bfc1c | 2949 | continue; |
4ed46869 KH |
2950 | |
2951 | default: | |
df7492f9 KH |
2952 | if (! (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATION)) |
2953 | goto invalid_code; | |
4ed46869 KH |
2954 | if (c1 >= 0x28 && c1 <= 0x2B) |
2955 | { /* designation of DIMENSION1_CHARS94 character set */ | |
2956 | ONE_MORE_BYTE (c2); | |
df7492f9 | 2957 | DECODE_DESIGNATION (c1 - 0x28, 1, 0, c2); |
4ed46869 KH |
2958 | } |
2959 | else if (c1 >= 0x2C && c1 <= 0x2F) | |
2960 | { /* designation of DIMENSION1_CHARS96 character set */ | |
2961 | ONE_MORE_BYTE (c2); | |
df7492f9 | 2962 | DECODE_DESIGNATION (c1 - 0x2C, 1, 1, c2); |
4ed46869 KH |
2963 | } |
2964 | else | |
df7492f9 | 2965 | goto invalid_code; |
b73bfc1c | 2966 | /* We must update these variables now. */ |
df7492f9 KH |
2967 | charset_id_0 = CODING_ISO_INVOKED_CHARSET (coding, 0); |
2968 | charset_id_1 = CODING_ISO_INVOKED_CHARSET (coding, 1); | |
b73bfc1c | 2969 | continue; |
4ed46869 | 2970 | } |
b73bfc1c | 2971 | } |
4ed46869 | 2972 | |
b73bfc1c | 2973 | /* Now we know CHARSET and 1st position code C1 of a character. |
df7492f9 KH |
2974 | Produce a decoded character while getting 2nd position code |
2975 | C2 if necessary. */ | |
2976 | c1 &= 0x7F; | |
2977 | if (CHARSET_DIMENSION (charset) > 1) | |
b73bfc1c KH |
2978 | { |
2979 | ONE_MORE_BYTE (c2); | |
df7492f9 | 2980 | if (c2 < 0x20 || (c2 >= 0x80 && c2 < 0xA0)) |
b73bfc1c | 2981 | /* C2 is not in a valid range. */ |
df7492f9 KH |
2982 | goto invalid_code; |
2983 | c1 = (c1 << 8) | (c2 & 0x7F); | |
2984 | if (CHARSET_DIMENSION (charset) > 2) | |
2985 | { | |
2986 | ONE_MORE_BYTE (c2); | |
2987 | if (c2 < 0x20 || (c2 >= 0x80 && c2 < 0xA0)) | |
2988 | /* C2 is not in a valid range. */ | |
2989 | goto invalid_code; | |
2990 | c1 = (c1 << 8) | (c2 & 0x7F); | |
2991 | } | |
2992 | } | |
2993 | ||
2994 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c1, c); | |
2995 | if (c < 0) | |
2996 | { | |
2997 | MAYBE_FINISH_COMPOSITION (); | |
2998 | for (; src_base < src; src_base++, char_offset++) | |
2999 | { | |
3000 | if (ASCII_BYTE_P (*src_base)) | |
3001 | *charbuf++ = *src_base; | |
3002 | else | |
3003 | *charbuf++ = BYTE8_TO_CHAR (*src_base); | |
3004 | } | |
3005 | } | |
3006 | else if (composition_state == COMPOSING_NO) | |
3007 | { | |
3008 | *charbuf++ = c; | |
3009 | char_offset++; | |
4ed46869 | 3010 | } |
df7492f9 KH |
3011 | else |
3012 | components[component_idx++] = c; | |
4ed46869 KH |
3013 | continue; |
3014 | ||
df7492f9 KH |
3015 | invalid_code: |
3016 | MAYBE_FINISH_COMPOSITION (); | |
4ed46869 | 3017 | src = src_base; |
df7492f9 KH |
3018 | consumed_chars = consumed_chars_base; |
3019 | ONE_MORE_BYTE (c); | |
3020 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
3021 | coding->errors++; | |
4ed46869 | 3022 | } |
fb88bf2d | 3023 | |
df7492f9 KH |
3024 | no_more_source: |
3025 | coding->consumed_char += consumed_chars_base; | |
3026 | coding->consumed = src_base - coding->source; | |
3027 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
3028 | } |
3029 | ||
b73bfc1c | 3030 | |
f4dee582 | 3031 | /* ISO2022 encoding stuff. */ |
4ed46869 KH |
3032 | |
3033 | /* | |
f4dee582 | 3034 | It is not enough to say just "ISO2022" on encoding, we have to |
df7492f9 | 3035 | specify more details. In Emacs, each coding system of ISO2022 |
4ed46869 | 3036 | variant has the following specifications: |
df7492f9 | 3037 | 1. Initial designation to G0 thru G3. |
4ed46869 KH |
3038 | 2. Allows short-form designation? |
3039 | 3. ASCII should be designated to G0 before control characters? | |
3040 | 4. ASCII should be designated to G0 at end of line? | |
3041 | 5. 7-bit environment or 8-bit environment? | |
3042 | 6. Use locking-shift? | |
3043 | 7. Use Single-shift? | |
3044 | And the following two are only for Japanese: | |
3045 | 8. Use ASCII in place of JIS0201-1976-Roman? | |
3046 | 9. Use JISX0208-1983 in place of JISX0208-1978? | |
df7492f9 KH |
3047 | These specifications are encoded in CODING_ISO_FLAGS (coding) as flag bits |
3048 | defined by macros CODING_ISO_FLAG_XXX. See `coding.h' for more | |
f4dee582 | 3049 | details. |
4ed46869 KH |
3050 | */ |
3051 | ||
3052 | /* Produce codes (escape sequence) for designating CHARSET to graphic | |
b73bfc1c KH |
3053 | register REG at DST, and increment DST. If <final-char> of CHARSET is |
3054 | '@', 'A', or 'B' and the coding system CODING allows, produce | |
3055 | designation sequence of short-form. */ | |
4ed46869 KH |
3056 | |
3057 | #define ENCODE_DESIGNATION(charset, reg, coding) \ | |
3058 | do { \ | |
df7492f9 | 3059 | unsigned char final_char = CHARSET_ISO_FINAL (charset); \ |
4ed46869 KH |
3060 | char *intermediate_char_94 = "()*+"; \ |
3061 | char *intermediate_char_96 = ",-./"; \ | |
df7492f9 KH |
3062 | int revision = -1; \ |
3063 | int c; \ | |
3064 | \ | |
3065 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_REVISION) \ | |
3066 | revision = XINT (CHARSET_ISO_REVISION (charset)); \ | |
3067 | \ | |
3068 | if (revision >= 0) \ | |
70c22245 | 3069 | { \ |
df7492f9 KH |
3070 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, '&'); \ |
3071 | EMIT_ONE_BYTE ('@' + revision); \ | |
4ed46869 | 3072 | } \ |
df7492f9 | 3073 | EMIT_ONE_ASCII_BYTE (ISO_CODE_ESC); \ |
4ed46869 KH |
3074 | if (CHARSET_DIMENSION (charset) == 1) \ |
3075 | { \ | |
df7492f9 KH |
3076 | if (! CHARSET_ISO_CHARS_96 (charset)) \ |
3077 | c = intermediate_char_94[reg]; \ | |
4ed46869 | 3078 | else \ |
df7492f9 KH |
3079 | c = intermediate_char_96[reg]; \ |
3080 | EMIT_ONE_ASCII_BYTE (c); \ | |
4ed46869 KH |
3081 | } \ |
3082 | else \ | |
3083 | { \ | |
df7492f9 KH |
3084 | EMIT_ONE_ASCII_BYTE ('$'); \ |
3085 | if (! CHARSET_ISO_CHARS_96 (charset)) \ | |
4ed46869 | 3086 | { \ |
df7492f9 | 3087 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_LONG_FORM \ |
b73bfc1c KH |
3088 | || reg != 0 \ |
3089 | || final_char < '@' || final_char > 'B') \ | |
df7492f9 | 3090 | EMIT_ONE_ASCII_BYTE (intermediate_char_94[reg]); \ |
4ed46869 KH |
3091 | } \ |
3092 | else \ | |
df7492f9 | 3093 | EMIT_ONE_ASCII_BYTE (intermediate_char_96[reg]); \ |
4ed46869 | 3094 | } \ |
df7492f9 KH |
3095 | EMIT_ONE_ASCII_BYTE (final_char); \ |
3096 | \ | |
3097 | CODING_ISO_DESIGNATION (coding, reg) = CHARSET_ID (charset); \ | |
4ed46869 KH |
3098 | } while (0) |
3099 | ||
df7492f9 | 3100 | |
4ed46869 KH |
3101 | /* The following two macros produce codes (control character or escape |
3102 | sequence) for ISO2022 single-shift functions (single-shift-2 and | |
3103 | single-shift-3). */ | |
3104 | ||
df7492f9 KH |
3105 | #define ENCODE_SINGLE_SHIFT_2 \ |
3106 | do { \ | |
3107 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ | |
3108 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'N'); \ | |
3109 | else \ | |
3110 | EMIT_ONE_BYTE (ISO_CODE_SS2); \ | |
3111 | CODING_ISO_SINGLE_SHIFTING (coding) = 1; \ | |
4ed46869 KH |
3112 | } while (0) |
3113 | ||
df7492f9 KH |
3114 | |
3115 | #define ENCODE_SINGLE_SHIFT_3 \ | |
3116 | do { \ | |
3117 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ | |
3118 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'O'); \ | |
3119 | else \ | |
3120 | EMIT_ONE_BYTE (ISO_CODE_SS3); \ | |
3121 | CODING_ISO_SINGLE_SHIFTING (coding) = 1; \ | |
4ed46869 KH |
3122 | } while (0) |
3123 | ||
df7492f9 | 3124 | |
4ed46869 KH |
3125 | /* The following four macros produce codes (control character or |
3126 | escape sequence) for ISO2022 locking-shift functions (shift-in, | |
3127 | shift-out, locking-shift-2, and locking-shift-3). */ | |
3128 | ||
df7492f9 KH |
3129 | #define ENCODE_SHIFT_IN \ |
3130 | do { \ | |
3131 | EMIT_ONE_ASCII_BYTE (ISO_CODE_SI); \ | |
3132 | CODING_ISO_INVOCATION (coding, 0) = 0; \ | |
4ed46869 KH |
3133 | } while (0) |
3134 | ||
df7492f9 KH |
3135 | |
3136 | #define ENCODE_SHIFT_OUT \ | |
3137 | do { \ | |
3138 | EMIT_ONE_ASCII_BYTE (ISO_CODE_SO); \ | |
3139 | CODING_ISO_INVOCATION (coding, 0) = 1; \ | |
4ed46869 KH |
3140 | } while (0) |
3141 | ||
df7492f9 KH |
3142 | |
3143 | #define ENCODE_LOCKING_SHIFT_2 \ | |
3144 | do { \ | |
3145 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'n'); \ | |
3146 | CODING_ISO_INVOCATION (coding, 0) = 2; \ | |
4ed46869 KH |
3147 | } while (0) |
3148 | ||
df7492f9 KH |
3149 | |
3150 | #define ENCODE_LOCKING_SHIFT_3 \ | |
3151 | do { \ | |
3152 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, 'n'); \ | |
3153 | CODING_ISO_INVOCATION (coding, 0) = 3; \ | |
4ed46869 KH |
3154 | } while (0) |
3155 | ||
df7492f9 | 3156 | |
f4dee582 RS |
3157 | /* Produce codes for a DIMENSION1 character whose character set is |
3158 | CHARSET and whose position-code is C1. Designation and invocation | |
4ed46869 KH |
3159 | sequences are also produced in advance if necessary. */ |
3160 | ||
6e85d753 KH |
3161 | #define ENCODE_ISO_CHARACTER_DIMENSION1(charset, c1) \ |
3162 | do { \ | |
df7492f9 KH |
3163 | int id = CHARSET_ID (charset); \ |
3164 | if (CODING_ISO_SINGLE_SHIFTING (coding)) \ | |
6e85d753 | 3165 | { \ |
df7492f9 KH |
3166 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ |
3167 | EMIT_ONE_ASCII_BYTE (c1 & 0x7F); \ | |
6e85d753 | 3168 | else \ |
df7492f9 KH |
3169 | EMIT_ONE_BYTE (c1 | 0x80); \ |
3170 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
6e85d753 KH |
3171 | break; \ |
3172 | } \ | |
df7492f9 | 3173 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 0)) \ |
6e85d753 | 3174 | { \ |
df7492f9 | 3175 | EMIT_ONE_ASCII_BYTE (c1 & 0x7F); \ |
6e85d753 KH |
3176 | break; \ |
3177 | } \ | |
df7492f9 | 3178 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 1)) \ |
6e85d753 | 3179 | { \ |
df7492f9 | 3180 | EMIT_ONE_BYTE (c1 | 0x80); \ |
6e85d753 KH |
3181 | break; \ |
3182 | } \ | |
6e85d753 KH |
3183 | else \ |
3184 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
3185 | must invoke it, or, at first, designate it to some graphic \ | |
3186 | register. Then repeat the loop to actually produce the \ | |
3187 | character. */ \ | |
df7492f9 KH |
3188 | dst = encode_invocation_designation (charset, coding, dst, \ |
3189 | &produced_chars); \ | |
4ed46869 KH |
3190 | } while (1) |
3191 | ||
df7492f9 | 3192 | |
f4dee582 RS |
3193 | /* Produce codes for a DIMENSION2 character whose character set is |
3194 | CHARSET and whose position-codes are C1 and C2. Designation and | |
4ed46869 KH |
3195 | invocation codes are also produced in advance if necessary. */ |
3196 | ||
6e85d753 KH |
3197 | #define ENCODE_ISO_CHARACTER_DIMENSION2(charset, c1, c2) \ |
3198 | do { \ | |
df7492f9 KH |
3199 | int id = CHARSET_ID (charset); \ |
3200 | if (CODING_ISO_SINGLE_SHIFTING (coding)) \ | |
6e85d753 | 3201 | { \ |
df7492f9 KH |
3202 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SEVEN_BITS) \ |
3203 | EMIT_TWO_ASCII_BYTES ((c1) & 0x7F, (c2) & 0x7F); \ | |
6e85d753 | 3204 | else \ |
df7492f9 KH |
3205 | EMIT_TWO_BYTES ((c1) | 0x80, (c2) | 0x80); \ |
3206 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; \ | |
6e85d753 KH |
3207 | break; \ |
3208 | } \ | |
df7492f9 | 3209 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 0)) \ |
6e85d753 | 3210 | { \ |
df7492f9 | 3211 | EMIT_TWO_ASCII_BYTES ((c1) & 0x7F, (c2) & 0x7F); \ |
6e85d753 KH |
3212 | break; \ |
3213 | } \ | |
df7492f9 | 3214 | else if (id == CODING_ISO_INVOKED_CHARSET (coding, 1)) \ |
6e85d753 | 3215 | { \ |
df7492f9 | 3216 | EMIT_TWO_BYTES ((c1) | 0x80, (c2) | 0x80); \ |
6e85d753 KH |
3217 | break; \ |
3218 | } \ | |
6e85d753 KH |
3219 | else \ |
3220 | /* Since CHARSET is not yet invoked to any graphic planes, we \ | |
3221 | must invoke it, or, at first, designate it to some graphic \ | |
3222 | register. Then repeat the loop to actually produce the \ | |
3223 | character. */ \ | |
df7492f9 KH |
3224 | dst = encode_invocation_designation (charset, coding, dst, \ |
3225 | &produced_chars); \ | |
4ed46869 KH |
3226 | } while (1) |
3227 | ||
05e6f5dc | 3228 | |
df7492f9 KH |
3229 | #define ENCODE_ISO_CHARACTER(charset, c) \ |
3230 | do { \ | |
3231 | int code = ENCODE_CHAR ((charset),(c)); \ | |
3232 | \ | |
3233 | if (CHARSET_DIMENSION (charset) == 1) \ | |
3234 | ENCODE_ISO_CHARACTER_DIMENSION1 ((charset), code); \ | |
3235 | else \ | |
3236 | ENCODE_ISO_CHARACTER_DIMENSION2 ((charset), code >> 8, code & 0xFF); \ | |
84fbb8a0 | 3237 | } while (0) |
bdd9fb48 | 3238 | |
05e6f5dc | 3239 | |
4ed46869 | 3240 | /* Produce designation and invocation codes at a place pointed by DST |
df7492f9 | 3241 | to use CHARSET. The element `spec.iso_2022' of *CODING is updated. |
4ed46869 KH |
3242 | Return new DST. */ |
3243 | ||
3244 | unsigned char * | |
df7492f9 KH |
3245 | encode_invocation_designation (charset, coding, dst, p_nchars) |
3246 | struct charset *charset; | |
4ed46869 KH |
3247 | struct coding_system *coding; |
3248 | unsigned char *dst; | |
df7492f9 | 3249 | int *p_nchars; |
4ed46869 | 3250 | { |
df7492f9 KH |
3251 | int multibytep = coding->dst_multibyte; |
3252 | int produced_chars = *p_nchars; | |
4ed46869 | 3253 | int reg; /* graphic register number */ |
df7492f9 | 3254 | int id = CHARSET_ID (charset); |
4ed46869 KH |
3255 | |
3256 | /* At first, check designations. */ | |
3257 | for (reg = 0; reg < 4; reg++) | |
df7492f9 | 3258 | if (id == CODING_ISO_DESIGNATION (coding, reg)) |
4ed46869 KH |
3259 | break; |
3260 | ||
3261 | if (reg >= 4) | |
3262 | { | |
3263 | /* CHARSET is not yet designated to any graphic registers. */ | |
3264 | /* At first check the requested designation. */ | |
df7492f9 KH |
3265 | reg = CODING_ISO_REQUEST (coding, id); |
3266 | if (reg < 0) | |
1ba9e4ab KH |
3267 | /* Since CHARSET requests no special designation, designate it |
3268 | to graphic register 0. */ | |
4ed46869 KH |
3269 | reg = 0; |
3270 | ||
3271 | ENCODE_DESIGNATION (charset, reg, coding); | |
3272 | } | |
3273 | ||
df7492f9 KH |
3274 | if (CODING_ISO_INVOCATION (coding, 0) != reg |
3275 | && CODING_ISO_INVOCATION (coding, 1) != reg) | |
4ed46869 KH |
3276 | { |
3277 | /* Since the graphic register REG is not invoked to any graphic | |
3278 | planes, invoke it to graphic plane 0. */ | |
3279 | switch (reg) | |
3280 | { | |
3281 | case 0: /* graphic register 0 */ | |
3282 | ENCODE_SHIFT_IN; | |
3283 | break; | |
3284 | ||
3285 | case 1: /* graphic register 1 */ | |
3286 | ENCODE_SHIFT_OUT; | |
3287 | break; | |
3288 | ||
3289 | case 2: /* graphic register 2 */ | |
df7492f9 | 3290 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
4ed46869 KH |
3291 | ENCODE_SINGLE_SHIFT_2; |
3292 | else | |
3293 | ENCODE_LOCKING_SHIFT_2; | |
3294 | break; | |
3295 | ||
3296 | case 3: /* graphic register 3 */ | |
df7492f9 | 3297 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_SINGLE_SHIFT) |
4ed46869 KH |
3298 | ENCODE_SINGLE_SHIFT_3; |
3299 | else | |
3300 | ENCODE_LOCKING_SHIFT_3; | |
3301 | break; | |
3302 | } | |
3303 | } | |
b73bfc1c | 3304 | |
df7492f9 | 3305 | *p_nchars = produced_chars; |
4ed46869 KH |
3306 | return dst; |
3307 | } | |
3308 | ||
df7492f9 KH |
3309 | /* The following three macros produce codes for indicating direction |
3310 | of text. */ | |
3311 | #define ENCODE_CONTROL_SEQUENCE_INTRODUCER \ | |
ec6d2bb8 | 3312 | do { \ |
df7492f9 KH |
3313 | if (CODING_ISO_FLAGS (coding) == CODING_ISO_FLAG_SEVEN_BITS) \ |
3314 | EMIT_TWO_ASCII_BYTES (ISO_CODE_ESC, '['); \ | |
ec6d2bb8 | 3315 | else \ |
df7492f9 | 3316 | EMIT_ONE_BYTE (ISO_CODE_CSI); \ |
ec6d2bb8 KH |
3317 | } while (0) |
3318 | ||
ec6d2bb8 | 3319 | |
df7492f9 KH |
3320 | #define ENCODE_DIRECTION_R2L() \ |
3321 | do { \ | |
3322 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst); \ | |
3323 | EMIT_TWO_ASCII_BYTES ('2', ']'); \ | |
ec6d2bb8 KH |
3324 | } while (0) |
3325 | ||
ec6d2bb8 | 3326 | |
df7492f9 | 3327 | #define ENCODE_DIRECTION_L2R() \ |
ec6d2bb8 | 3328 | do { \ |
df7492f9 KH |
3329 | ENCODE_CONTROL_SEQUENCE_INTRODUCER (dst); \ |
3330 | EMIT_TWO_ASCII_BYTES ('0', ']'); \ | |
4ed46869 KH |
3331 | } while (0) |
3332 | ||
4ed46869 KH |
3333 | |
3334 | /* Produce codes for designation and invocation to reset the graphic | |
3335 | planes and registers to initial state. */ | |
df7492f9 KH |
3336 | #define ENCODE_RESET_PLANE_AND_REGISTER() \ |
3337 | do { \ | |
3338 | int reg; \ | |
3339 | struct charset *charset; \ | |
3340 | \ | |
3341 | if (CODING_ISO_INVOCATION (coding, 0) != 0) \ | |
3342 | ENCODE_SHIFT_IN; \ | |
3343 | for (reg = 0; reg < 4; reg++) \ | |
3344 | if (CODING_ISO_INITIAL (coding, reg) >= 0 \ | |
3345 | && (CODING_ISO_DESIGNATION (coding, reg) \ | |
3346 | != CODING_ISO_INITIAL (coding, reg))) \ | |
3347 | { \ | |
3348 | charset = CHARSET_FROM_ID (CODING_ISO_INITIAL (coding, reg)); \ | |
3349 | ENCODE_DESIGNATION (charset, reg, coding); \ | |
3350 | } \ | |
4ed46869 KH |
3351 | } while (0) |
3352 | ||
df7492f9 | 3353 | |
bdd9fb48 | 3354 | /* Produce designation sequences of charsets in the line started from |
b73bfc1c | 3355 | SRC to a place pointed by DST, and return updated DST. |
bdd9fb48 KH |
3356 | |
3357 | If the current block ends before any end-of-line, we may fail to | |
d46c5b12 KH |
3358 | find all the necessary designations. */ |
3359 | ||
b73bfc1c | 3360 | static unsigned char * |
df7492f9 | 3361 | encode_designation_at_bol (coding, charbuf, charbuf_end, dst) |
e0e989f6 | 3362 | struct coding_system *coding; |
df7492f9 KH |
3363 | int *charbuf, *charbuf_end; |
3364 | unsigned char *dst; | |
e0e989f6 | 3365 | { |
df7492f9 | 3366 | struct charset *charset; |
bdd9fb48 KH |
3367 | /* Table of charsets to be designated to each graphic register. */ |
3368 | int r[4]; | |
df7492f9 KH |
3369 | int c, found = 0, reg; |
3370 | int produced_chars = 0; | |
3371 | int multibytep = coding->dst_multibyte; | |
3372 | Lisp_Object attrs; | |
3373 | Lisp_Object charset_list; | |
3374 | ||
3375 | attrs = CODING_ID_ATTRS (coding->id); | |
3376 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
3377 | if (EQ (charset_list, Qiso_2022)) | |
3378 | charset_list = Viso_2022_charset_list; | |
bdd9fb48 KH |
3379 | |
3380 | for (reg = 0; reg < 4; reg++) | |
3381 | r[reg] = -1; | |
3382 | ||
b73bfc1c | 3383 | while (found < 4) |
e0e989f6 | 3384 | { |
df7492f9 KH |
3385 | int id; |
3386 | ||
3387 | c = *charbuf++; | |
b73bfc1c KH |
3388 | if (c == '\n') |
3389 | break; | |
df7492f9 KH |
3390 | charset = char_charset (c, charset_list, NULL); |
3391 | id = CHARSET_ID (charset); | |
3392 | reg = CODING_ISO_REQUEST (coding, id); | |
3393 | if (reg >= 0 && r[reg] < 0) | |
bdd9fb48 KH |
3394 | { |
3395 | found++; | |
df7492f9 | 3396 | r[reg] = id; |
bdd9fb48 | 3397 | } |
bdd9fb48 KH |
3398 | } |
3399 | ||
3400 | if (found) | |
3401 | { | |
3402 | for (reg = 0; reg < 4; reg++) | |
3403 | if (r[reg] >= 0 | |
df7492f9 KH |
3404 | && CODING_ISO_DESIGNATION (coding, reg) != r[reg]) |
3405 | ENCODE_DESIGNATION (CHARSET_FROM_ID (r[reg]), reg, coding); | |
e0e989f6 | 3406 | } |
b73bfc1c KH |
3407 | |
3408 | return dst; | |
e0e989f6 KH |
3409 | } |
3410 | ||
4ed46869 KH |
3411 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". */ |
3412 | ||
df7492f9 KH |
3413 | static int |
3414 | encode_coding_iso_2022 (coding) | |
4ed46869 | 3415 | struct coding_system *coding; |
4ed46869 | 3416 | { |
df7492f9 KH |
3417 | int multibytep = coding->dst_multibyte; |
3418 | int *charbuf = coding->charbuf; | |
3419 | int *charbuf_end = charbuf + coding->charbuf_used; | |
3420 | unsigned char *dst = coding->destination + coding->produced; | |
3421 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
3422 | int safe_room = 16; | |
3423 | int bol_designation | |
3424 | = (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATE_AT_BOL | |
3425 | && CODING_ISO_BOL (coding)); | |
3426 | int produced_chars = 0; | |
3427 | Lisp_Object attrs, eol_type, charset_list; | |
3428 | int ascii_compatible; | |
b73bfc1c | 3429 | int c; |
05e6f5dc | 3430 | |
df7492f9 | 3431 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
004068e4 KH |
3432 | setup_iso_safe_charsets (attrs); |
3433 | coding->safe_charsets | |
3434 | = (char *) XSTRING (CODING_ATTR_SAFE_CHARSETS(attrs))->data; | |
bdd9fb48 | 3435 | |
df7492f9 | 3436 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); |
4ed46869 | 3437 | |
df7492f9 | 3438 | while (charbuf < charbuf_end) |
4ed46869 | 3439 | { |
df7492f9 | 3440 | ASSURE_DESTINATION (safe_room); |
b73bfc1c | 3441 | |
df7492f9 | 3442 | if (bol_designation) |
b73bfc1c | 3443 | { |
df7492f9 | 3444 | unsigned char *dst_prev = dst; |
4ed46869 | 3445 | |
bdd9fb48 | 3446 | /* We have to produce designation sequences if any now. */ |
df7492f9 KH |
3447 | dst = encode_designation_at_bol (coding, charbuf, charbuf_end, dst); |
3448 | bol_designation = 0; | |
3449 | /* We are sure that designation sequences are all ASCII bytes. */ | |
3450 | produced_chars += dst - dst_prev; | |
4ed46869 | 3451 | } |
ec6d2bb8 | 3452 | |
df7492f9 | 3453 | c = *charbuf++; |
4ed46869 | 3454 | |
b73bfc1c KH |
3455 | /* Now encode the character C. */ |
3456 | if (c < 0x20 || c == 0x7F) | |
3457 | { | |
df7492f9 KH |
3458 | if (c == '\n' |
3459 | || (c == '\r' && EQ (eol_type, Qmac))) | |
19a8d9e0 | 3460 | { |
df7492f9 KH |
3461 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_EOL) |
3462 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3463 | if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_INIT_AT_BOL) | |
b73bfc1c | 3464 | { |
df7492f9 KH |
3465 | int i; |
3466 | ||
3467 | for (i = 0; i < 4; i++) | |
3468 | CODING_ISO_DESIGNATION (coding, i) | |
3469 | = CODING_ISO_INITIAL (coding, i); | |
b73bfc1c | 3470 | } |
df7492f9 KH |
3471 | bol_designation |
3472 | = CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_DESIGNATE_AT_BOL; | |
19a8d9e0 | 3473 | } |
df7492f9 KH |
3474 | else if (CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_CNTL) |
3475 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3476 | EMIT_ONE_ASCII_BYTE (c); | |
4ed46869 | 3477 | } |
df7492f9 | 3478 | else if (ASCII_CHAR_P (c)) |
88993dfd | 3479 | { |
df7492f9 KH |
3480 | if (ascii_compatible) |
3481 | EMIT_ONE_ASCII_BYTE (c); | |
3482 | else | |
3483 | ENCODE_ISO_CHARACTER (CHARSET_FROM_ID (charset_ascii), c); | |
88993dfd | 3484 | } |
b73bfc1c | 3485 | else |
df7492f9 KH |
3486 | { |
3487 | struct charset *charset = char_charset (c, charset_list, NULL); | |
b73bfc1c | 3488 | |
df7492f9 KH |
3489 | if (!charset) |
3490 | { | |
41cbe562 KH |
3491 | if (coding->mode & CODING_MODE_SAFE_ENCODING) |
3492 | { | |
3493 | c = CODING_INHIBIT_CHARACTER_SUBSTITUTION; | |
3494 | charset = CHARSET_FROM_ID (charset_ascii); | |
3495 | } | |
3496 | else | |
3497 | { | |
3498 | c = coding->default_char; | |
3499 | charset = char_charset (c, charset_list, NULL); | |
3500 | } | |
df7492f9 KH |
3501 | } |
3502 | ENCODE_ISO_CHARACTER (charset, c); | |
3503 | } | |
84fbb8a0 | 3504 | } |
b73bfc1c | 3505 | |
df7492f9 KH |
3506 | if (coding->mode & CODING_MODE_LAST_BLOCK |
3507 | && CODING_ISO_FLAGS (coding) & CODING_ISO_FLAG_RESET_AT_EOL) | |
3508 | { | |
3509 | ASSURE_DESTINATION (safe_room); | |
3510 | ENCODE_RESET_PLANE_AND_REGISTER (); | |
3511 | } | |
3512 | coding->result = CODING_RESULT_SUCCESS; | |
3513 | CODING_ISO_BOL (coding) = bol_designation; | |
3514 | coding->produced_char += produced_chars; | |
3515 | coding->produced = dst - coding->destination; | |
3516 | return 0; | |
4ed46869 KH |
3517 | } |
3518 | ||
3519 | \f | |
df7492f9 | 3520 | /*** 8,9. SJIS and BIG5 handlers ***/ |
4ed46869 | 3521 | |
df7492f9 | 3522 | /* Although SJIS and BIG5 are not ISO's coding system, they are used |
4ed46869 KH |
3523 | quite widely. So, for the moment, Emacs supports them in the bare |
3524 | C code. But, in the future, they may be supported only by CCL. */ | |
3525 | ||
3526 | /* SJIS is a coding system encoding three character sets: ASCII, right | |
3527 | half of JISX0201-Kana, and JISX0208. An ASCII character is encoded | |
3528 | as is. A character of charset katakana-jisx0201 is encoded by | |
3529 | "position-code + 0x80". A character of charset japanese-jisx0208 | |
3530 | is encoded in 2-byte but two position-codes are divided and shifted | |
df7492f9 | 3531 | so that it fit in the range below. |
4ed46869 KH |
3532 | |
3533 | --- CODE RANGE of SJIS --- | |
3534 | (character set) (range) | |
3535 | ASCII 0x00 .. 0x7F | |
df7492f9 | 3536 | KATAKANA-JISX0201 0xA0 .. 0xDF |
c28a9453 | 3537 | JISX0208 (1st byte) 0x81 .. 0x9F and 0xE0 .. 0xEF |
d14d03ac | 3538 | (2nd byte) 0x40 .. 0x7E and 0x80 .. 0xFC |
4ed46869 KH |
3539 | ------------------------------- |
3540 | ||
3541 | */ | |
3542 | ||
3543 | /* BIG5 is a coding system encoding two character sets: ASCII and | |
3544 | Big5. An ASCII character is encoded as is. Big5 is a two-byte | |
df7492f9 | 3545 | character set and is encoded in two-byte. |
4ed46869 KH |
3546 | |
3547 | --- CODE RANGE of BIG5 --- | |
3548 | (character set) (range) | |
3549 | ASCII 0x00 .. 0x7F | |
3550 | Big5 (1st byte) 0xA1 .. 0xFE | |
3551 | (2nd byte) 0x40 .. 0x7E and 0xA1 .. 0xFE | |
3552 | -------------------------- | |
3553 | ||
df7492f9 | 3554 | */ |
4ed46869 KH |
3555 | |
3556 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3557 | Check if a text is encoded in SJIS. If it is, return | |
df7492f9 | 3558 | CATEGORY_MASK_SJIS, else return 0. */ |
4ed46869 | 3559 | |
0a28aafb | 3560 | static int |
df7492f9 KH |
3561 | detect_coding_sjis (coding, mask) |
3562 | struct coding_system *coding; | |
3563 | int *mask; | |
4ed46869 | 3564 | { |
df7492f9 KH |
3565 | unsigned char *src = coding->source, *src_base = src; |
3566 | unsigned char *src_end = coding->source + coding->src_bytes; | |
3567 | int multibytep = coding->src_multibyte; | |
3568 | int consumed_chars = 0; | |
3569 | int found = 0; | |
b73bfc1c | 3570 | int c; |
df7492f9 KH |
3571 | |
3572 | /* A coding system of this category is always ASCII compatible. */ | |
3573 | src += coding->head_ascii; | |
4ed46869 | 3574 | |
b73bfc1c | 3575 | while (1) |
4ed46869 | 3576 | { |
df7492f9 | 3577 | ONE_MORE_BYTE (c); |
682169fe KH |
3578 | if (c < 0x80) |
3579 | continue; | |
df7492f9 | 3580 | if ((c >= 0x81 && c <= 0x9F) || (c >= 0xE0 && c <= 0xEF)) |
4ed46869 | 3581 | { |
df7492f9 | 3582 | ONE_MORE_BYTE (c); |
682169fe | 3583 | if (c < 0x40 || c == 0x7F || c > 0xFC) |
df7492f9 KH |
3584 | break; |
3585 | found = 1; | |
4ed46869 | 3586 | } |
df7492f9 KH |
3587 | else if (c >= 0xA0 && c < 0xE0) |
3588 | found = 1; | |
3589 | else | |
3590 | break; | |
4ed46869 | 3591 | } |
df7492f9 KH |
3592 | *mask &= ~CATEGORY_MASK_SJIS; |
3593 | return 0; | |
3594 | ||
3595 | no_more_source: | |
3596 | if (!found) | |
3597 | return 0; | |
3598 | *mask &= CATEGORY_MASK_SJIS; | |
3599 | return 1; | |
4ed46869 KH |
3600 | } |
3601 | ||
3602 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3603 | Check if a text is encoded in BIG5. If it is, return | |
df7492f9 | 3604 | CATEGORY_MASK_BIG5, else return 0. */ |
4ed46869 | 3605 | |
0a28aafb | 3606 | static int |
df7492f9 KH |
3607 | detect_coding_big5 (coding, mask) |
3608 | struct coding_system *coding; | |
3609 | int *mask; | |
4ed46869 | 3610 | { |
df7492f9 KH |
3611 | unsigned char *src = coding->source, *src_base = src; |
3612 | unsigned char *src_end = coding->source + coding->src_bytes; | |
3613 | int multibytep = coding->src_multibyte; | |
3614 | int consumed_chars = 0; | |
3615 | int found = 0; | |
b73bfc1c | 3616 | int c; |
fa42c37f | 3617 | |
df7492f9 KH |
3618 | /* A coding system of this category is always ASCII compatible. */ |
3619 | src += coding->head_ascii; | |
fa42c37f | 3620 | |
b73bfc1c | 3621 | while (1) |
fa42c37f | 3622 | { |
df7492f9 KH |
3623 | ONE_MORE_BYTE (c); |
3624 | if (c < 0x80) | |
fa42c37f | 3625 | continue; |
df7492f9 | 3626 | if (c >= 0xA1) |
fa42c37f | 3627 | { |
df7492f9 KH |
3628 | ONE_MORE_BYTE (c); |
3629 | if (c < 0x40 || (c >= 0x7F && c <= 0xA0)) | |
fa42c37f | 3630 | return 0; |
df7492f9 | 3631 | found = 1; |
fa42c37f | 3632 | } |
df7492f9 KH |
3633 | else |
3634 | break; | |
fa42c37f | 3635 | } |
df7492f9 | 3636 | *mask &= ~CATEGORY_MASK_BIG5; |
fa42c37f | 3637 | return 0; |
df7492f9 KH |
3638 | |
3639 | no_more_source: | |
3640 | if (!found) | |
3641 | return 0; | |
3642 | *mask &= CATEGORY_MASK_BIG5; | |
3643 | return 1; | |
fa42c37f KH |
3644 | } |
3645 | ||
4ed46869 KH |
3646 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". |
3647 | If SJIS_P is 1, decode SJIS text, else decode BIG5 test. */ | |
3648 | ||
b73bfc1c | 3649 | static void |
df7492f9 | 3650 | decode_coding_sjis (coding) |
4ed46869 | 3651 | struct coding_system *coding; |
4ed46869 | 3652 | { |
df7492f9 KH |
3653 | unsigned char *src = coding->source + coding->consumed; |
3654 | unsigned char *src_end = coding->source + coding->src_bytes; | |
b73bfc1c | 3655 | unsigned char *src_base; |
df7492f9 KH |
3656 | int *charbuf = coding->charbuf; |
3657 | int *charbuf_end = charbuf + coding->charbuf_size; | |
3658 | int consumed_chars = 0, consumed_chars_base; | |
3659 | int multibytep = coding->src_multibyte; | |
3660 | struct charset *charset_roman, *charset_kanji, *charset_kana; | |
3661 | Lisp_Object attrs, eol_type, charset_list, val; | |
a5d301df | 3662 | |
df7492f9 KH |
3663 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
3664 | ||
3665 | val = charset_list; | |
3666 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
3667 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
3668 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))); | |
4ed46869 | 3669 | |
b73bfc1c | 3670 | while (1) |
4ed46869 | 3671 | { |
df7492f9 | 3672 | int c, c1; |
b73bfc1c KH |
3673 | |
3674 | src_base = src; | |
df7492f9 KH |
3675 | consumed_chars_base = consumed_chars; |
3676 | ||
3677 | if (charbuf >= charbuf_end) | |
3678 | break; | |
3679 | ||
3680 | ONE_MORE_BYTE (c); | |
b73bfc1c | 3681 | |
df7492f9 | 3682 | if (c == '\r') |
4ed46869 | 3683 | { |
df7492f9 | 3684 | if (EQ (eol_type, Qdos)) |
4ed46869 | 3685 | { |
df7492f9 KH |
3686 | if (src == src_end) |
3687 | goto no_more_source; | |
3688 | if (*src == '\n') | |
3689 | ONE_MORE_BYTE (c); | |
4ed46869 | 3690 | } |
df7492f9 KH |
3691 | else if (EQ (eol_type, Qmac)) |
3692 | c = '\n'; | |
4ed46869 | 3693 | } |
54f78171 | 3694 | else |
df7492f9 KH |
3695 | { |
3696 | struct charset *charset; | |
3697 | ||
3698 | if (c < 0x80) | |
3699 | charset = charset_roman; | |
3700 | else | |
4ed46869 | 3701 | { |
df7492f9 KH |
3702 | if (c >= 0xF0) |
3703 | goto invalid_code; | |
3704 | if (c < 0xA0 || c >= 0xE0) | |
fb88bf2d | 3705 | { |
54f78171 | 3706 | /* SJIS -> JISX0208 */ |
df7492f9 KH |
3707 | ONE_MORE_BYTE (c1); |
3708 | if (c1 < 0x40 || c1 == 0x7F || c1 > 0xFC) | |
3709 | goto invalid_code; | |
3710 | c = (c << 8) | c1; | |
3711 | SJIS_TO_JIS (c); | |
3712 | charset = charset_kanji; | |
5e34de15 | 3713 | } |
fb88bf2d | 3714 | else |
b73bfc1c | 3715 | /* SJIS -> JISX0201-Kana */ |
df7492f9 KH |
3716 | charset = charset_kana; |
3717 | } | |
3718 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c, c); | |
3719 | } | |
3720 | *charbuf++ = c; | |
3721 | continue; | |
3722 | ||
3723 | invalid_code: | |
3724 | src = src_base; | |
3725 | consumed_chars = consumed_chars_base; | |
3726 | ONE_MORE_BYTE (c); | |
3727 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
3728 | coding->errors++; | |
3729 | } | |
3730 | ||
3731 | no_more_source: | |
3732 | coding->consumed_char += consumed_chars_base; | |
3733 | coding->consumed = src_base - coding->source; | |
3734 | coding->charbuf_used = charbuf - coding->charbuf; | |
3735 | } | |
3736 | ||
3737 | static void | |
3738 | decode_coding_big5 (coding) | |
3739 | struct coding_system *coding; | |
3740 | { | |
3741 | unsigned char *src = coding->source + coding->consumed; | |
3742 | unsigned char *src_end = coding->source + coding->src_bytes; | |
3743 | unsigned char *src_base; | |
3744 | int *charbuf = coding->charbuf; | |
3745 | int *charbuf_end = charbuf + coding->charbuf_size; | |
3746 | int consumed_chars = 0, consumed_chars_base; | |
3747 | int multibytep = coding->src_multibyte; | |
3748 | struct charset *charset_roman, *charset_big5; | |
3749 | Lisp_Object attrs, eol_type, charset_list, val; | |
3750 | ||
3751 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
3752 | val = charset_list; | |
3753 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
3754 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
3755 | ||
3756 | while (1) | |
3757 | { | |
3758 | int c, c1; | |
3759 | ||
3760 | src_base = src; | |
3761 | consumed_chars_base = consumed_chars; | |
3762 | ||
3763 | if (charbuf >= charbuf_end) | |
3764 | break; | |
3765 | ||
3766 | ONE_MORE_BYTE (c); | |
3767 | ||
3768 | if (c == '\r') | |
3769 | { | |
3770 | if (EQ (eol_type, Qdos)) | |
3771 | { | |
3772 | if (src == src_end) | |
3773 | goto no_more_source; | |
3774 | if (*src == '\n') | |
3775 | ONE_MORE_BYTE (c); | |
4ed46869 | 3776 | } |
df7492f9 KH |
3777 | else if (EQ (eol_type, Qmac)) |
3778 | c = '\n'; | |
3779 | } | |
3780 | else | |
3781 | { | |
3782 | struct charset *charset; | |
3783 | if (c < 0x80) | |
3784 | charset = charset_roman; | |
fb88bf2d | 3785 | else |
fb88bf2d | 3786 | { |
54f78171 | 3787 | /* BIG5 -> Big5 */ |
df7492f9 KH |
3788 | if (c < 0xA1 || c > 0xFE) |
3789 | goto invalid_code; | |
3790 | ONE_MORE_BYTE (c1); | |
3791 | if (c1 < 0x40 || (c1 > 0x7E && c1 < 0xA1) || c1 > 0xFE) | |
3792 | goto invalid_code; | |
3793 | c = c << 8 | c1; | |
3794 | charset = charset_big5; | |
4ed46869 | 3795 | } |
df7492f9 | 3796 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c, c); |
4ed46869 | 3797 | } |
4ed46869 | 3798 | |
df7492f9 | 3799 | *charbuf++ = c; |
fb88bf2d KH |
3800 | continue; |
3801 | ||
df7492f9 | 3802 | invalid_code: |
4ed46869 | 3803 | src = src_base; |
df7492f9 KH |
3804 | consumed_chars = consumed_chars_base; |
3805 | ONE_MORE_BYTE (c); | |
3806 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
3807 | coding->errors++; | |
fb88bf2d | 3808 | } |
d46c5b12 | 3809 | |
df7492f9 KH |
3810 | no_more_source: |
3811 | coding->consumed_char += consumed_chars_base; | |
3812 | coding->consumed = src_base - coding->source; | |
3813 | coding->charbuf_used = charbuf - coding->charbuf; | |
3814 | } | |
3815 | ||
3816 | /* See the above "GENERAL NOTES on `encode_coding_XXX ()' functions". | |
3817 | This function can encode charsets `ascii', `katakana-jisx0201', | |
3818 | `japanese-jisx0208', `chinese-big5-1', and `chinese-big5-2'. We | |
3819 | are sure that all these charsets are registered as official charset | |
3820 | (i.e. do not have extended leading-codes). Characters of other | |
3821 | charsets are produced without any encoding. If SJIS_P is 1, encode | |
3822 | SJIS text, else encode BIG5 text. */ | |
3823 | ||
3824 | static int | |
3825 | encode_coding_sjis (coding) | |
3826 | struct coding_system *coding; | |
3827 | { | |
3828 | int multibytep = coding->dst_multibyte; | |
3829 | int *charbuf = coding->charbuf; | |
3830 | int *charbuf_end = charbuf + coding->charbuf_used; | |
3831 | unsigned char *dst = coding->destination + coding->produced; | |
3832 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
3833 | int safe_room = 4; | |
3834 | int produced_chars = 0; | |
3835 | Lisp_Object attrs, eol_type, charset_list, val; | |
3836 | int ascii_compatible; | |
3837 | struct charset *charset_roman, *charset_kanji, *charset_kana; | |
3838 | int c; | |
3839 | ||
3840 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
3841 | val = charset_list; | |
3842 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
3843 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
3844 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))); | |
3845 | ||
3846 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); | |
3847 | ||
3848 | while (charbuf < charbuf_end) | |
3849 | { | |
3850 | ASSURE_DESTINATION (safe_room); | |
3851 | c = *charbuf++; | |
3852 | /* Now encode the character C. */ | |
3853 | if (ASCII_CHAR_P (c) && ascii_compatible) | |
3854 | EMIT_ONE_ASCII_BYTE (c); | |
3855 | else | |
3856 | { | |
3857 | unsigned code; | |
3858 | struct charset *charset = char_charset (c, charset_list, &code); | |
3859 | ||
3860 | if (!charset) | |
3861 | { | |
41cbe562 KH |
3862 | if (coding->mode & CODING_MODE_SAFE_ENCODING) |
3863 | { | |
3864 | code = CODING_INHIBIT_CHARACTER_SUBSTITUTION; | |
3865 | charset = CHARSET_FROM_ID (charset_ascii); | |
3866 | } | |
3867 | else | |
3868 | { | |
3869 | c = coding->default_char; | |
3870 | charset = char_charset (c, charset_list, &code); | |
3871 | } | |
df7492f9 KH |
3872 | } |
3873 | if (code == CHARSET_INVALID_CODE (charset)) | |
3874 | abort (); | |
3875 | if (charset == charset_kanji) | |
3876 | { | |
3877 | int c1, c2; | |
3878 | JIS_TO_SJIS (code); | |
3879 | c1 = code >> 8, c2 = code & 0xFF; | |
3880 | EMIT_TWO_BYTES (c1, c2); | |
3881 | } | |
3882 | else if (charset == charset_kana) | |
3883 | EMIT_ONE_BYTE (code | 0x80); | |
3884 | else | |
3885 | EMIT_ONE_ASCII_BYTE (code & 0x7F); | |
3886 | } | |
3887 | } | |
3888 | coding->result = CODING_RESULT_SUCCESS; | |
3889 | coding->produced_char += produced_chars; | |
3890 | coding->produced = dst - coding->destination; | |
3891 | return 0; | |
3892 | } | |
3893 | ||
3894 | static int | |
3895 | encode_coding_big5 (coding) | |
3896 | struct coding_system *coding; | |
3897 | { | |
3898 | int multibytep = coding->dst_multibyte; | |
3899 | int *charbuf = coding->charbuf; | |
3900 | int *charbuf_end = charbuf + coding->charbuf_used; | |
3901 | unsigned char *dst = coding->destination + coding->produced; | |
3902 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
3903 | int safe_room = 4; | |
3904 | int produced_chars = 0; | |
3905 | Lisp_Object attrs, eol_type, charset_list, val; | |
3906 | int ascii_compatible; | |
3907 | struct charset *charset_roman, *charset_big5; | |
3908 | int c; | |
3909 | ||
3910 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
3911 | val = charset_list; | |
3912 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
3913 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
3914 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); | |
3915 | ||
3916 | while (charbuf < charbuf_end) | |
3917 | { | |
3918 | ASSURE_DESTINATION (safe_room); | |
3919 | c = *charbuf++; | |
3920 | /* Now encode the character C. */ | |
3921 | if (ASCII_CHAR_P (c) && ascii_compatible) | |
3922 | EMIT_ONE_ASCII_BYTE (c); | |
3923 | else | |
3924 | { | |
3925 | unsigned code; | |
3926 | struct charset *charset = char_charset (c, charset_list, &code); | |
3927 | ||
3928 | if (! charset) | |
3929 | { | |
41cbe562 KH |
3930 | if (coding->mode & CODING_MODE_SAFE_ENCODING) |
3931 | { | |
3932 | code = CODING_INHIBIT_CHARACTER_SUBSTITUTION; | |
3933 | charset = CHARSET_FROM_ID (charset_ascii); | |
3934 | } | |
3935 | else | |
3936 | { | |
3937 | c = coding->default_char; | |
3938 | charset = char_charset (c, charset_list, &code); | |
3939 | } | |
df7492f9 KH |
3940 | } |
3941 | if (code == CHARSET_INVALID_CODE (charset)) | |
3942 | abort (); | |
3943 | if (charset == charset_big5) | |
3944 | { | |
3945 | int c1, c2; | |
3946 | ||
3947 | c1 = code >> 8, c2 = code & 0xFF; | |
3948 | EMIT_TWO_BYTES (c1, c2); | |
3949 | } | |
3950 | else | |
3951 | EMIT_ONE_ASCII_BYTE (code & 0x7F); | |
3952 | } | |
3953 | } | |
3954 | coding->result = CODING_RESULT_SUCCESS; | |
3955 | coding->produced_char += produced_chars; | |
3956 | coding->produced = dst - coding->destination; | |
3957 | return 0; | |
3958 | } | |
3959 | ||
3960 | \f | |
3961 | /*** 10. CCL handlers ***/ | |
3962 | ||
3963 | /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions". | |
3964 | Check if a text is encoded in a coding system of which | |
3965 | encoder/decoder are written in CCL program. If it is, return | |
3966 | CATEGORY_MASK_CCL, else return 0. */ | |
3967 | ||
3968 | static int | |
3969 | detect_coding_ccl (coding, mask) | |
3970 | struct coding_system *coding; | |
3971 | int *mask; | |
3972 | { | |
3973 | unsigned char *src = coding->source, *src_base = src; | |
3974 | unsigned char *src_end = coding->source + coding->src_bytes; | |
3975 | int multibytep = coding->src_multibyte; | |
3976 | int consumed_chars = 0; | |
3977 | int found = 0; | |
3978 | unsigned char *valids = CODING_CCL_VALIDS (coding); | |
3979 | int head_ascii = coding->head_ascii; | |
3980 | Lisp_Object attrs; | |
3981 | ||
3982 | coding = &coding_categories[coding_category_ccl]; | |
3983 | attrs = CODING_ID_ATTRS (coding->id); | |
3984 | if (! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
3985 | src += head_ascii; | |
3986 | ||
3987 | while (1) | |
3988 | { | |
3989 | int c; | |
3990 | ONE_MORE_BYTE (c); | |
3991 | if (! valids[c]) | |
3992 | break; | |
3993 | if (!found && valids[c] > 1) | |
3994 | found = 1; | |
3995 | } | |
3996 | *mask &= ~CATEGORY_MASK_CCL; | |
3997 | return 0; | |
3998 | ||
3999 | no_more_source: | |
4000 | if (!found) | |
4001 | return 0; | |
4002 | *mask &= CATEGORY_MASK_CCL; | |
4003 | return 1; | |
4004 | } | |
4005 | ||
4006 | static void | |
4007 | decode_coding_ccl (coding) | |
4008 | struct coding_system *coding; | |
4009 | { | |
4010 | unsigned char *src = coding->source + coding->consumed; | |
4011 | unsigned char *src_end = coding->source + coding->src_bytes; | |
4012 | int *charbuf = coding->charbuf; | |
4013 | int *charbuf_end = charbuf + coding->charbuf_size; | |
4014 | int consumed_chars = 0; | |
4015 | int multibytep = coding->src_multibyte; | |
4016 | struct ccl_program ccl; | |
4017 | int source_charbuf[1024]; | |
4018 | int source_byteidx[1024]; | |
4019 | ||
4020 | setup_ccl_program (&ccl, CODING_CCL_DECODER (coding)); | |
4021 | ||
4022 | while (src < src_end) | |
4023 | { | |
4024 | unsigned char *p = src; | |
4025 | int *source, *source_end; | |
4026 | int i = 0; | |
4027 | ||
4028 | if (multibytep) | |
4029 | while (i < 1024 && p < src_end) | |
4030 | { | |
4031 | source_byteidx[i] = p - src; | |
4032 | source_charbuf[i++] = STRING_CHAR_ADVANCE (p); | |
4033 | } | |
4034 | else | |
4035 | while (i < 1024 && p < src_end) | |
4036 | source_charbuf[i++] = *p++; | |
4037 | ||
4038 | if (p == src_end && coding->mode & CODING_MODE_LAST_BLOCK) | |
4039 | ccl.last_block = 1; | |
4040 | ||
4041 | source = source_charbuf; | |
4042 | source_end = source + i; | |
4043 | while (source < source_end) | |
4044 | { | |
4045 | ccl_driver (&ccl, source, charbuf, | |
4046 | source_end - source, charbuf_end - charbuf); | |
4047 | source += ccl.consumed; | |
4048 | charbuf += ccl.produced; | |
4049 | if (ccl.status != CCL_STAT_SUSPEND_BY_DST) | |
4050 | break; | |
4051 | } | |
4052 | if (source < source_end) | |
4053 | src += source_byteidx[source - source_charbuf]; | |
4054 | else | |
4055 | src = p; | |
4056 | consumed_chars += source - source_charbuf; | |
4057 | ||
4058 | if (ccl.status != CCL_STAT_SUSPEND_BY_SRC | |
4059 | && ccl.status != CODING_RESULT_INSUFFICIENT_SRC) | |
4060 | break; | |
4061 | } | |
4062 | ||
4063 | switch (ccl.status) | |
4064 | { | |
4065 | case CCL_STAT_SUSPEND_BY_SRC: | |
4066 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; | |
4067 | break; | |
4068 | case CCL_STAT_SUSPEND_BY_DST: | |
4069 | break; | |
4070 | case CCL_STAT_QUIT: | |
4071 | case CCL_STAT_INVALID_CMD: | |
4072 | coding->result = CODING_RESULT_INTERRUPT; | |
4073 | break; | |
4074 | default: | |
4075 | coding->result = CODING_RESULT_SUCCESS; | |
4076 | break; | |
4077 | } | |
4078 | coding->consumed_char += consumed_chars; | |
4079 | coding->consumed = src - coding->source; | |
4080 | coding->charbuf_used = charbuf - coding->charbuf; | |
4081 | } | |
4082 | ||
4083 | static int | |
4084 | encode_coding_ccl (coding) | |
4085 | struct coding_system *coding; | |
4086 | { | |
4087 | struct ccl_program ccl; | |
4088 | int multibytep = coding->dst_multibyte; | |
4089 | int *charbuf = coding->charbuf; | |
4090 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4091 | unsigned char *dst = coding->destination + coding->produced; | |
4092 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4093 | unsigned char *adjusted_dst_end = dst_end - 1; | |
4094 | int destination_charbuf[1024]; | |
4095 | int i, produced_chars = 0; | |
4096 | ||
4097 | setup_ccl_program (&ccl, CODING_CCL_ENCODER (coding)); | |
4098 | ||
4099 | ccl.last_block = coding->mode & CODING_MODE_LAST_BLOCK; | |
4100 | ccl.dst_multibyte = coding->dst_multibyte; | |
4101 | ||
4102 | while (charbuf < charbuf_end && dst < adjusted_dst_end) | |
4103 | { | |
4104 | int dst_bytes = dst_end - dst; | |
4105 | if (dst_bytes > 1024) | |
4106 | dst_bytes = 1024; | |
4107 | ||
4108 | ccl_driver (&ccl, charbuf, destination_charbuf, | |
4109 | charbuf_end - charbuf, dst_bytes); | |
4110 | charbuf += ccl.consumed; | |
4111 | if (multibytep) | |
4112 | for (i = 0; i < ccl.produced; i++) | |
4113 | EMIT_ONE_BYTE (destination_charbuf[i] & 0xFF); | |
4114 | else | |
4115 | { | |
4116 | for (i = 0; i < ccl.produced; i++) | |
4117 | *dst++ = destination_charbuf[i] & 0xFF; | |
4118 | produced_chars += ccl.produced; | |
4119 | } | |
4120 | } | |
4121 | ||
4122 | switch (ccl.status) | |
4123 | { | |
4124 | case CCL_STAT_SUSPEND_BY_SRC: | |
4125 | coding->result = CODING_RESULT_INSUFFICIENT_SRC; | |
4126 | break; | |
4127 | case CCL_STAT_SUSPEND_BY_DST: | |
4128 | coding->result = CODING_RESULT_INSUFFICIENT_DST; | |
4129 | break; | |
4130 | case CCL_STAT_QUIT: | |
4131 | case CCL_STAT_INVALID_CMD: | |
4132 | coding->result = CODING_RESULT_INTERRUPT; | |
4133 | break; | |
4134 | default: | |
4135 | coding->result = CODING_RESULT_SUCCESS; | |
4136 | break; | |
4137 | } | |
4138 | ||
4139 | coding->produced_char += produced_chars; | |
4140 | coding->produced = dst - coding->destination; | |
4141 | return 0; | |
4ed46869 KH |
4142 | } |
4143 | ||
df7492f9 KH |
4144 | |
4145 | \f | |
4146 | /*** 10, 11. no-conversion handlers ***/ | |
4147 | ||
4148 | /* See the above "GENERAL NOTES on `decode_coding_XXX ()' functions". */ | |
4ed46869 | 4149 | |
b73bfc1c | 4150 | static void |
df7492f9 | 4151 | decode_coding_raw_text (coding) |
4ed46869 | 4152 | struct coding_system *coding; |
4ed46869 | 4153 | { |
df7492f9 | 4154 | coding->chars_at_source = 1; |
2c78b7e1 KH |
4155 | coding->consumed_char = 0; |
4156 | coding->consumed = 0; | |
df7492f9 KH |
4157 | coding->result = CODING_RESULT_SUCCESS; |
4158 | } | |
4ed46869 | 4159 | |
df7492f9 KH |
4160 | static int |
4161 | encode_coding_raw_text (coding) | |
4162 | struct coding_system *coding; | |
4163 | { | |
4164 | int multibytep = coding->dst_multibyte; | |
4165 | int *charbuf = coding->charbuf; | |
4166 | int *charbuf_end = coding->charbuf + coding->charbuf_used; | |
4167 | unsigned char *dst = coding->destination + coding->produced; | |
4168 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4169 | int produced_chars = 0; | |
4170 | int c; | |
a5d301df | 4171 | |
df7492f9 | 4172 | if (multibytep) |
b73bfc1c | 4173 | { |
df7492f9 | 4174 | int safe_room = MAX_MULTIBYTE_LENGTH * 2; |
4ed46869 | 4175 | |
df7492f9 KH |
4176 | if (coding->src_multibyte) |
4177 | while (charbuf < charbuf_end) | |
4178 | { | |
4179 | ASSURE_DESTINATION (safe_room); | |
4180 | c = *charbuf++; | |
4181 | if (ASCII_CHAR_P (c)) | |
4182 | EMIT_ONE_ASCII_BYTE (c); | |
4183 | else if (CHAR_BYTE8_P (c)) | |
4184 | { | |
4185 | c = CHAR_TO_BYTE8 (c); | |
4186 | EMIT_ONE_BYTE (c); | |
4187 | } | |
4188 | else | |
4189 | { | |
4190 | unsigned char str[MAX_MULTIBYTE_LENGTH], *p0 = str, *p1 = str; | |
93dec019 | 4191 | |
df7492f9 KH |
4192 | CHAR_STRING_ADVANCE (c, p1); |
4193 | while (p0 < p1) | |
4194 | EMIT_ONE_BYTE (*p0); | |
4195 | } | |
4196 | } | |
b73bfc1c | 4197 | else |
df7492f9 KH |
4198 | while (charbuf < charbuf_end) |
4199 | { | |
4200 | ASSURE_DESTINATION (safe_room); | |
4201 | c = *charbuf++; | |
4202 | EMIT_ONE_BYTE (c); | |
4203 | } | |
4204 | } | |
4205 | else | |
4206 | { | |
4207 | if (coding->src_multibyte) | |
b73bfc1c | 4208 | { |
df7492f9 KH |
4209 | int safe_room = MAX_MULTIBYTE_LENGTH; |
4210 | ||
4211 | while (charbuf < charbuf_end) | |
b73bfc1c | 4212 | { |
df7492f9 KH |
4213 | ASSURE_DESTINATION (safe_room); |
4214 | c = *charbuf++; | |
4215 | if (ASCII_CHAR_P (c)) | |
4216 | *dst++ = c; | |
4217 | else if (CHAR_BYTE8_P (c)) | |
4218 | *dst++ = CHAR_TO_BYTE8 (c); | |
b73bfc1c | 4219 | else |
df7492f9 KH |
4220 | CHAR_STRING_ADVANCE (c, dst); |
4221 | produced_chars++; | |
b73bfc1c | 4222 | } |
4ed46869 | 4223 | } |
df7492f9 KH |
4224 | else |
4225 | { | |
4226 | ASSURE_DESTINATION (charbuf_end - charbuf); | |
4227 | while (charbuf < charbuf_end && dst < dst_end) | |
4228 | *dst++ = *charbuf++; | |
4229 | produced_chars = dst - (coding->destination + coding->dst_bytes); | |
4230 | } | |
4ed46869 | 4231 | } |
df7492f9 KH |
4232 | coding->result = CODING_RESULT_SUCCESS; |
4233 | coding->produced_char += produced_chars; | |
4234 | coding->produced = dst - coding->destination; | |
4235 | return 0; | |
4ed46869 KH |
4236 | } |
4237 | ||
0a28aafb | 4238 | static int |
df7492f9 KH |
4239 | detect_coding_charset (coding, mask) |
4240 | struct coding_system *coding; | |
4241 | int *mask; | |
1397dc18 | 4242 | { |
df7492f9 KH |
4243 | unsigned char *src = coding->source, *src_base = src; |
4244 | unsigned char *src_end = coding->source + coding->src_bytes; | |
4245 | int multibytep = coding->src_multibyte; | |
4246 | int consumed_chars = 0; | |
4247 | Lisp_Object attrs, valids; | |
1397dc18 | 4248 | |
df7492f9 KH |
4249 | coding = &coding_categories[coding_category_charset]; |
4250 | attrs = CODING_ID_ATTRS (coding->id); | |
4251 | valids = AREF (attrs, coding_attr_charset_valids); | |
4252 | ||
4253 | if (! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
4254 | src += coding->head_ascii; | |
1397dc18 | 4255 | |
b73bfc1c | 4256 | while (1) |
1397dc18 | 4257 | { |
df7492f9 | 4258 | int c; |
1397dc18 | 4259 | |
df7492f9 KH |
4260 | ONE_MORE_BYTE (c); |
4261 | if (NILP (AREF (valids, c))) | |
4262 | break; | |
4263 | } | |
4264 | *mask &= ~CATEGORY_MASK_CHARSET; | |
4265 | return 0; | |
4ed46869 | 4266 | |
df7492f9 KH |
4267 | no_more_source: |
4268 | *mask &= CATEGORY_MASK_CHARSET; | |
4269 | return 1; | |
4270 | } | |
4ed46869 | 4271 | |
b73bfc1c | 4272 | static void |
df7492f9 | 4273 | decode_coding_charset (coding) |
4ed46869 | 4274 | struct coding_system *coding; |
4ed46869 | 4275 | { |
df7492f9 KH |
4276 | unsigned char *src = coding->source + coding->consumed; |
4277 | unsigned char *src_end = coding->source + coding->src_bytes; | |
b73bfc1c | 4278 | unsigned char *src_base; |
df7492f9 KH |
4279 | int *charbuf = coding->charbuf; |
4280 | int *charbuf_end = charbuf + coding->charbuf_size; | |
4281 | int consumed_chars = 0, consumed_chars_base; | |
4282 | int multibytep = coding->src_multibyte; | |
4eb6d3f1 | 4283 | Lisp_Object attrs, eol_type, charset_list, valids; |
df7492f9 KH |
4284 | |
4285 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); | |
4eb6d3f1 | 4286 | valids = AREF (attrs, coding_attr_charset_valids); |
b73bfc1c | 4287 | |
df7492f9 | 4288 | while (1) |
4ed46869 | 4289 | { |
4eb6d3f1 | 4290 | int c; |
df7492f9 KH |
4291 | |
4292 | src_base = src; | |
4293 | consumed_chars_base = consumed_chars; | |
b73bfc1c | 4294 | |
df7492f9 KH |
4295 | if (charbuf >= charbuf_end) |
4296 | break; | |
4297 | ||
4eb6d3f1 | 4298 | ONE_MORE_BYTE (c); |
df7492f9 | 4299 | if (c == '\r') |
d46c5b12 | 4300 | { |
df7492f9 | 4301 | if (EQ (eol_type, Qdos)) |
b73bfc1c | 4302 | { |
4eb6d3f1 KH |
4303 | if (src < src_end |
4304 | && *src == '\n') | |
df7492f9 | 4305 | ONE_MORE_BYTE (c); |
b73bfc1c | 4306 | } |
df7492f9 | 4307 | else if (EQ (eol_type, Qmac)) |
b73bfc1c | 4308 | c = '\n'; |
d46c5b12 | 4309 | } |
df7492f9 | 4310 | else |
d46c5b12 | 4311 | { |
4eb6d3f1 KH |
4312 | Lisp_Object val; |
4313 | struct charset *charset; | |
4314 | int c1; | |
4315 | ||
4316 | val = AREF (valids, c); | |
4317 | if (NILP (val)) | |
4318 | goto invalid_code; | |
4319 | charset = CHARSET_FROM_ID (XFASTINT (val)); | |
4320 | if (CHARSET_DIMENSION (charset) > 1) | |
4321 | { | |
4322 | ONE_MORE_BYTE (c1); | |
4323 | c = (c << 8) | c1; | |
4324 | if (CHARSET_DIMENSION (charset) > 2) | |
4325 | { | |
4326 | ONE_MORE_BYTE (c1); | |
4327 | c = (c << 8) | c1; | |
4328 | if (CHARSET_DIMENSION (charset) > 3) | |
4329 | { | |
4330 | ONE_MORE_BYTE (c1); | |
4331 | c = (c << 8) | c1; | |
4332 | } | |
4333 | } | |
4334 | } | |
4335 | CODING_DECODE_CHAR (coding, src, src_base, src_end, charset, c, c); | |
df7492f9 KH |
4336 | if (c < 0) |
4337 | goto invalid_code; | |
d46c5b12 | 4338 | } |
df7492f9 KH |
4339 | *charbuf++ = c; |
4340 | continue; | |
4341 | ||
4342 | invalid_code: | |
4343 | src = src_base; | |
4344 | consumed_chars = consumed_chars_base; | |
4345 | ONE_MORE_BYTE (c); | |
4346 | *charbuf++ = ASCII_BYTE_P (c) ? c : BYTE8_TO_CHAR (c); | |
4347 | coding->errors++; | |
4ed46869 KH |
4348 | } |
4349 | ||
df7492f9 KH |
4350 | no_more_source: |
4351 | coding->consumed_char += consumed_chars_base; | |
4352 | coding->consumed = src_base - coding->source; | |
4353 | coding->charbuf_used = charbuf - coding->charbuf; | |
4ed46869 KH |
4354 | } |
4355 | ||
df7492f9 KH |
4356 | static int |
4357 | encode_coding_charset (coding) | |
4ed46869 | 4358 | struct coding_system *coding; |
4ed46869 | 4359 | { |
df7492f9 KH |
4360 | int multibytep = coding->dst_multibyte; |
4361 | int *charbuf = coding->charbuf; | |
4362 | int *charbuf_end = charbuf + coding->charbuf_used; | |
4363 | unsigned char *dst = coding->destination + coding->produced; | |
4364 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
4365 | int safe_room = MAX_MULTIBYTE_LENGTH; | |
4366 | int produced_chars = 0; | |
df7492f9 KH |
4367 | Lisp_Object attrs, eol_type, charset_list; |
4368 | int ascii_compatible; | |
b73bfc1c | 4369 | int c; |
b73bfc1c | 4370 | |
df7492f9 | 4371 | CODING_GET_INFO (coding, attrs, eol_type, charset_list); |
df7492f9 | 4372 | ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs)); |
fb88bf2d | 4373 | |
df7492f9 | 4374 | while (charbuf < charbuf_end) |
4ed46869 | 4375 | { |
4eb6d3f1 | 4376 | struct charset *charset; |
df7492f9 KH |
4377 | unsigned code; |
4378 | ||
4379 | ASSURE_DESTINATION (safe_room); | |
4380 | c = *charbuf++; | |
4381 | if (ascii_compatible && ASCII_CHAR_P (c)) | |
4382 | EMIT_ONE_ASCII_BYTE (c); | |
d46c5b12 | 4383 | else |
4eb6d3f1 KH |
4384 | { |
4385 | charset = char_charset (c, charset_list, &code); | |
4386 | if (charset) | |
4387 | { | |
4388 | if (CHARSET_DIMENSION (charset) == 1) | |
4389 | EMIT_ONE_BYTE (code); | |
4390 | else if (CHARSET_DIMENSION (charset) == 2) | |
4391 | EMIT_TWO_BYTES (code >> 8, code & 0xFF); | |
4392 | else if (CHARSET_DIMENSION (charset) == 3) | |
4393 | EMIT_THREE_BYTES (code >> 16, (code >> 8) & 0xFF, code & 0xFF); | |
4394 | else | |
4395 | EMIT_FOUR_BYTES (code >> 24, (code >> 16) & 0xFF, | |
4396 | (code >> 8) & 0xFF, code & 0xFF); | |
4397 | } | |
4398 | else | |
41cbe562 KH |
4399 | { |
4400 | if (coding->mode & CODING_MODE_SAFE_ENCODING) | |
4401 | c = CODING_INHIBIT_CHARACTER_SUBSTITUTION; | |
4402 | else | |
4403 | c = coding->default_char; | |
4404 | EMIT_ONE_BYTE (c); | |
4405 | } | |
4eb6d3f1 | 4406 | } |
4ed46869 KH |
4407 | } |
4408 | ||
df7492f9 KH |
4409 | coding->result = CODING_RESULT_SUCCESS; |
4410 | coding->produced_char += produced_chars; | |
4411 | coding->produced = dst - coding->destination; | |
4412 | return 0; | |
4ed46869 KH |
4413 | } |
4414 | ||
4415 | \f | |
1397dc18 | 4416 | /*** 7. C library functions ***/ |
4ed46869 | 4417 | |
df7492f9 | 4418 | /* In Emacs Lisp, coding system is represented by a Lisp symbol which |
4ed46869 | 4419 | has a property `coding-system'. The value of this property is a |
df7492f9 | 4420 | vector of length 5 (called as coding-vector). Among elements of |
4ed46869 KH |
4421 | this vector, the first (element[0]) and the fifth (element[4]) |
4422 | carry important information for decoding/encoding. Before | |
4423 | decoding/encoding, this information should be set in fields of a | |
4424 | structure of type `coding_system'. | |
4425 | ||
df7492f9 | 4426 | A value of property `coding-system' can be a symbol of another |
4ed46869 KH |
4427 | subsidiary coding-system. In that case, Emacs gets coding-vector |
4428 | from that symbol. | |
4429 | ||
4430 | `element[0]' contains information to be set in `coding->type'. The | |
4431 | value and its meaning is as follows: | |
4432 | ||
0ef69138 KH |
4433 | 0 -- coding_type_emacs_mule |
4434 | 1 -- coding_type_sjis | |
df7492f9 | 4435 | 2 -- coding_type_iso_2022 |
0ef69138 KH |
4436 | 3 -- coding_type_big5 |
4437 | 4 -- coding_type_ccl encoder/decoder written in CCL | |
4438 | nil -- coding_type_no_conversion | |
4439 | t -- coding_type_undecided (automatic conversion on decoding, | |
4440 | no-conversion on encoding) | |
4ed46869 KH |
4441 | |
4442 | `element[4]' contains information to be set in `coding->flags' and | |
4443 | `coding->spec'. The meaning varies by `coding->type'. | |
4444 | ||
df7492f9 | 4445 | If `coding->type' is `coding_type_iso_2022', element[4] is a vector |
4ed46869 KH |
4446 | of length 32 (of which the first 13 sub-elements are used now). |
4447 | Meanings of these sub-elements are: | |
4448 | ||
df7492f9 KH |
4449 | sub-element[N] where N is 0 through 3: to be set in `coding->spec.iso_2022' |
4450 | If the value is an integer of valid charset, the charset is | |
4451 | assumed to be designated to graphic register N initially. | |
4ed46869 | 4452 | |
df7492f9 KH |
4453 | If the value is minus, it is a minus value of charset which |
4454 | reserves graphic register N, which means that the charset is | |
4455 | not designated initially but should be designated to graphic | |
4456 | register N just before encoding a character in that charset. | |
1397dc18 | 4457 | |
df7492f9 KH |
4458 | If the value is nil, graphic register N is never used on |
4459 | encoding. | |
4460 | ||
4461 | sub-element[N] where N is 4 through 11: to be set in `coding->flags' | |
4462 | Each value takes t or nil. See the section ISO2022 of | |
4463 | `coding.h' for more information. | |
1397dc18 | 4464 | |
df7492f9 KH |
4465 | If `coding->type' is `coding_type_big5', element[4] is t to denote |
4466 | BIG5-ETen or nil to denote BIG5-HKU. | |
4ed46869 | 4467 | |
df7492f9 | 4468 | If `coding->type' takes the other value, element[4] is ignored. |
27901516 | 4469 | |
df7492f9 KH |
4470 | Emacs Lisp's coding system also carries information about format of |
4471 | end-of-line in a value of property `eol-type'. If the value is | |
4472 | integer, 0 means eol_lf, 1 means eol_crlf, and 2 means eol_cr. If | |
4473 | it is not integer, it should be a vector of subsidiary coding | |
4474 | systems of which property `eol-type' has one of above values. | |
4ed46869 | 4475 | |
df7492f9 | 4476 | */ |
4ed46869 | 4477 | |
df7492f9 KH |
4478 | /* Setup coding context CODING from information about CODING_SYSTEM. |
4479 | If CODING_SYSTEM is nil, `no-conversion' is assumed. If | |
4480 | CODING_SYSTEM is invalid, signal an error. */ | |
ec6d2bb8 KH |
4481 | |
4482 | void | |
df7492f9 KH |
4483 | setup_coding_system (coding_system, coding) |
4484 | Lisp_Object coding_system; | |
ec6d2bb8 KH |
4485 | struct coding_system *coding; |
4486 | { | |
df7492f9 KH |
4487 | Lisp_Object attrs; |
4488 | Lisp_Object eol_type; | |
4489 | Lisp_Object coding_type; | |
4490 | Lisp_Object val; | |
ec6d2bb8 | 4491 | |
df7492f9 KH |
4492 | if (NILP (coding_system)) |
4493 | coding_system = Qno_conversion; | |
4494 | ||
4495 | CHECK_CODING_SYSTEM_GET_ID (coding_system, coding->id); | |
4496 | ||
4497 | attrs = CODING_ID_ATTRS (coding->id); | |
4498 | eol_type = CODING_ID_EOL_TYPE (coding->id); | |
4499 | ||
4500 | coding->mode = 0; | |
4501 | coding->head_ascii = -1; | |
4502 | coding->common_flags | |
4503 | = (VECTORP (eol_type) ? CODING_REQUIRE_DETECTION_MASK : 0); | |
4504 | ||
4505 | val = CODING_ATTR_SAFE_CHARSETS (attrs); | |
4506 | coding->max_charset_id = XSTRING (val)->size - 1; | |
4507 | coding->safe_charsets = (char *) XSTRING (val)->data; | |
4508 | coding->default_char = XINT (CODING_ATTR_DEFAULT_CHAR (attrs)); | |
4509 | ||
4510 | coding_type = CODING_ATTR_TYPE (attrs); | |
4511 | if (EQ (coding_type, Qundecided)) | |
4512 | { | |
4513 | coding->detector = NULL; | |
4514 | coding->decoder = decode_coding_raw_text; | |
4515 | coding->encoder = encode_coding_raw_text; | |
4516 | coding->common_flags |= CODING_REQUIRE_DETECTION_MASK; | |
4517 | } | |
4518 | else if (EQ (coding_type, Qiso_2022)) | |
4519 | { | |
4520 | int i; | |
4521 | int flags = XINT (AREF (attrs, coding_attr_iso_flags)); | |
4522 | ||
4523 | /* Invoke graphic register 0 to plane 0. */ | |
4524 | CODING_ISO_INVOCATION (coding, 0) = 0; | |
4525 | /* Invoke graphic register 1 to plane 1 if we can use 8-bit. */ | |
4526 | CODING_ISO_INVOCATION (coding, 1) | |
4527 | = (flags & CODING_ISO_FLAG_SEVEN_BITS ? -1 : 1); | |
4528 | /* Setup the initial status of designation. */ | |
4529 | for (i = 0; i < 4; i++) | |
4530 | CODING_ISO_DESIGNATION (coding, i) = CODING_ISO_INITIAL (coding, i); | |
4531 | /* Not single shifting initially. */ | |
4532 | CODING_ISO_SINGLE_SHIFTING (coding) = 0; | |
4533 | /* Beginning of buffer should also be regarded as bol. */ | |
4534 | CODING_ISO_BOL (coding) = 1; | |
4535 | coding->detector = detect_coding_iso_2022; | |
4536 | coding->decoder = decode_coding_iso_2022; | |
4537 | coding->encoder = encode_coding_iso_2022; | |
4538 | if (flags & CODING_ISO_FLAG_SAFE) | |
4539 | coding->mode |= CODING_MODE_SAFE_ENCODING; | |
4540 | coding->common_flags | |
4541 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK | |
4542 | | CODING_REQUIRE_FLUSHING_MASK); | |
4543 | if (flags & CODING_ISO_FLAG_COMPOSITION) | |
4544 | coding->common_flags |= CODING_ANNOTATE_COMPOSITION_MASK; | |
4545 | if (flags & CODING_ISO_FLAG_FULL_SUPPORT) | |
4546 | { | |
4547 | setup_iso_safe_charsets (attrs); | |
4548 | val = CODING_ATTR_SAFE_CHARSETS (attrs); | |
4549 | coding->max_charset_id = XSTRING (val)->size - 1; | |
4550 | coding->safe_charsets = (char *) XSTRING (val)->data; | |
4551 | } | |
4552 | CODING_ISO_FLAGS (coding) = flags; | |
4553 | } | |
4554 | else if (EQ (coding_type, Qcharset)) | |
4555 | { | |
4556 | coding->detector = detect_coding_charset; | |
4557 | coding->decoder = decode_coding_charset; | |
4558 | coding->encoder = encode_coding_charset; | |
4559 | coding->common_flags | |
4560 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
4561 | } | |
4562 | else if (EQ (coding_type, Qutf_8)) | |
4563 | { | |
4564 | coding->detector = detect_coding_utf_8; | |
4565 | coding->decoder = decode_coding_utf_8; | |
4566 | coding->encoder = encode_coding_utf_8; | |
4567 | coding->common_flags | |
4568 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
4569 | } | |
4570 | else if (EQ (coding_type, Qutf_16)) | |
4571 | { | |
4572 | val = AREF (attrs, coding_attr_utf_16_bom); | |
4573 | CODING_UTF_16_BOM (coding) = (CONSP (val) ? utf_16_detect_bom | |
4574 | : EQ (val, Qt) ? utf_16_with_bom | |
4575 | : utf_16_without_bom); | |
4576 | val = AREF (attrs, coding_attr_utf_16_endian); | |
4577 | CODING_UTF_16_ENDIAN (coding) = (NILP (val) ? utf_16_big_endian | |
4578 | : utf_16_little_endian); | |
e19c3639 | 4579 | CODING_UTF_16_SURROGATE (coding) = 0; |
df7492f9 KH |
4580 | coding->detector = detect_coding_utf_16; |
4581 | coding->decoder = decode_coding_utf_16; | |
4582 | coding->encoder = encode_coding_utf_16; | |
4583 | coding->common_flags | |
4584 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
4585 | } | |
4586 | else if (EQ (coding_type, Qccl)) | |
4587 | { | |
4588 | coding->detector = detect_coding_ccl; | |
4589 | coding->decoder = decode_coding_ccl; | |
4590 | coding->encoder = encode_coding_ccl; | |
4591 | coding->common_flags | |
4592 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK | |
4593 | | CODING_REQUIRE_FLUSHING_MASK); | |
4594 | } | |
4595 | else if (EQ (coding_type, Qemacs_mule)) | |
4596 | { | |
4597 | coding->detector = detect_coding_emacs_mule; | |
4598 | coding->decoder = decode_coding_emacs_mule; | |
4599 | coding->encoder = encode_coding_emacs_mule; | |
4600 | coding->common_flags | |
4601 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
4602 | if (! NILP (AREF (attrs, coding_attr_emacs_mule_full)) | |
4603 | && ! EQ (CODING_ATTR_CHARSET_LIST (attrs), Vemacs_mule_charset_list)) | |
4604 | { | |
4605 | Lisp_Object tail, safe_charsets; | |
4606 | int max_charset_id = 0; | |
4607 | ||
4608 | for (tail = Vemacs_mule_charset_list; CONSP (tail); | |
4609 | tail = XCDR (tail)) | |
4610 | if (max_charset_id < XFASTINT (XCAR (tail))) | |
4611 | max_charset_id = XFASTINT (XCAR (tail)); | |
4612 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), | |
4613 | make_number (255)); | |
4614 | for (tail = Vemacs_mule_charset_list; CONSP (tail); | |
4615 | tail = XCDR (tail)) | |
4616 | XSTRING (safe_charsets)->data[XFASTINT (XCAR (tail))] = 0; | |
4617 | coding->max_charset_id = max_charset_id; | |
4618 | coding->safe_charsets = (char *) XSTRING (safe_charsets)->data; | |
4619 | } | |
4620 | } | |
4621 | else if (EQ (coding_type, Qshift_jis)) | |
4622 | { | |
4623 | coding->detector = detect_coding_sjis; | |
4624 | coding->decoder = decode_coding_sjis; | |
4625 | coding->encoder = encode_coding_sjis; | |
4626 | coding->common_flags | |
4627 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
4628 | } | |
4629 | else if (EQ (coding_type, Qbig5)) | |
4630 | { | |
4631 | coding->detector = detect_coding_big5; | |
4632 | coding->decoder = decode_coding_big5; | |
4633 | coding->encoder = encode_coding_big5; | |
4634 | coding->common_flags | |
4635 | |= (CODING_REQUIRE_DECODING_MASK | CODING_REQUIRE_ENCODING_MASK); | |
4636 | } | |
4637 | else /* EQ (coding_type, Qraw_text) */ | |
ec6d2bb8 | 4638 | { |
df7492f9 KH |
4639 | coding->detector = NULL; |
4640 | coding->decoder = decode_coding_raw_text; | |
4641 | coding->encoder = encode_coding_raw_text; | |
4642 | coding->common_flags |= CODING_FOR_UNIBYTE_MASK; | |
ec6d2bb8 | 4643 | } |
df7492f9 KH |
4644 | |
4645 | return; | |
ec6d2bb8 KH |
4646 | } |
4647 | ||
df7492f9 KH |
4648 | /* Return raw-text or one of its subsidiaries that has the same |
4649 | eol_type as CODING-SYSTEM. */ | |
ec6d2bb8 | 4650 | |
df7492f9 KH |
4651 | Lisp_Object |
4652 | raw_text_coding_system (coding_system) | |
4653 | Lisp_Object coding_system; | |
ec6d2bb8 | 4654 | { |
0be8721c | 4655 | Lisp_Object spec, attrs; |
df7492f9 KH |
4656 | Lisp_Object eol_type, raw_text_eol_type; |
4657 | ||
4658 | spec = CODING_SYSTEM_SPEC (coding_system); | |
4659 | attrs = AREF (spec, 0); | |
4660 | ||
4661 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) | |
4662 | return coding_system; | |
ec6d2bb8 | 4663 | |
df7492f9 KH |
4664 | eol_type = AREF (spec, 2); |
4665 | if (VECTORP (eol_type)) | |
4666 | return Qraw_text; | |
4667 | spec = CODING_SYSTEM_SPEC (Qraw_text); | |
4668 | raw_text_eol_type = AREF (spec, 2); | |
4669 | return (EQ (eol_type, Qunix) ? AREF (raw_text_eol_type, 0) | |
4670 | : EQ (eol_type, Qdos) ? AREF (raw_text_eol_type, 1) | |
4671 | : AREF (raw_text_eol_type, 2)); | |
ec6d2bb8 KH |
4672 | } |
4673 | ||
54f78171 | 4674 | |
df7492f9 KH |
4675 | /* If CODING_SYSTEM doesn't specify end-of-line format but PARENT |
4676 | does, return one of the subsidiary that has the same eol-spec as | |
4677 | PARENT. Otherwise, return CODING_SYSTEM. */ | |
4678 | ||
4679 | Lisp_Object | |
4680 | coding_inherit_eol_type (coding_system, parent) | |
b74e4686 | 4681 | Lisp_Object coding_system, parent; |
54f78171 | 4682 | { |
df7492f9 | 4683 | Lisp_Object spec, attrs, eol_type; |
54f78171 | 4684 | |
df7492f9 KH |
4685 | spec = CODING_SYSTEM_SPEC (coding_system); |
4686 | attrs = AREF (spec, 0); | |
4687 | eol_type = AREF (spec, 2); | |
4688 | if (VECTORP (eol_type)) | |
4689 | { | |
4690 | Lisp_Object parent_spec; | |
df7492f9 KH |
4691 | Lisp_Object parent_eol_type; |
4692 | ||
4693 | parent_spec | |
4694 | = CODING_SYSTEM_SPEC (buffer_defaults.buffer_file_coding_system); | |
4695 | parent_eol_type = AREF (parent_spec, 2); | |
4696 | if (EQ (parent_eol_type, Qunix)) | |
4697 | coding_system = AREF (eol_type, 0); | |
4698 | else if (EQ (parent_eol_type, Qdos)) | |
4699 | coding_system = AREF (eol_type, 1); | |
4700 | else if (EQ (parent_eol_type, Qmac)) | |
4701 | coding_system = AREF (eol_type, 2); | |
54f78171 | 4702 | } |
df7492f9 | 4703 | return coding_system; |
54f78171 KH |
4704 | } |
4705 | ||
4ed46869 KH |
4706 | /* Emacs has a mechanism to automatically detect a coding system if it |
4707 | is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But, | |
4708 | it's impossible to distinguish some coding systems accurately | |
4709 | because they use the same range of codes. So, at first, coding | |
4710 | systems are categorized into 7, those are: | |
4711 | ||
0ef69138 | 4712 | o coding-category-emacs-mule |
4ed46869 KH |
4713 | |
4714 | The category for a coding system which has the same code range | |
4715 | as Emacs' internal format. Assigned the coding-system (Lisp | |
0ef69138 | 4716 | symbol) `emacs-mule' by default. |
4ed46869 KH |
4717 | |
4718 | o coding-category-sjis | |
4719 | ||
4720 | The category for a coding system which has the same code range | |
4721 | as SJIS. Assigned the coding-system (Lisp | |
7717c392 | 4722 | symbol) `japanese-shift-jis' by default. |
4ed46869 KH |
4723 | |
4724 | o coding-category-iso-7 | |
4725 | ||
4726 | The category for a coding system which has the same code range | |
7717c392 | 4727 | as ISO2022 of 7-bit environment. This doesn't use any locking |
d46c5b12 KH |
4728 | shift and single shift functions. This can encode/decode all |
4729 | charsets. Assigned the coding-system (Lisp symbol) | |
4730 | `iso-2022-7bit' by default. | |
4731 | ||
4732 | o coding-category-iso-7-tight | |
4733 | ||
4734 | Same as coding-category-iso-7 except that this can | |
4735 | encode/decode only the specified charsets. | |
4ed46869 KH |
4736 | |
4737 | o coding-category-iso-8-1 | |
4738 | ||
4739 | The category for a coding system which has the same code range | |
4740 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
4741 | for DIMENSION1 charset. This doesn't use any locking shift |
4742 | and single shift functions. Assigned the coding-system (Lisp | |
4743 | symbol) `iso-latin-1' by default. | |
4ed46869 KH |
4744 | |
4745 | o coding-category-iso-8-2 | |
4746 | ||
4747 | The category for a coding system which has the same code range | |
4748 | as ISO2022 of 8-bit environment and graphic plane 1 used only | |
7717c392 KH |
4749 | for DIMENSION2 charset. This doesn't use any locking shift |
4750 | and single shift functions. Assigned the coding-system (Lisp | |
4751 | symbol) `japanese-iso-8bit' by default. | |
4ed46869 | 4752 | |
7717c392 | 4753 | o coding-category-iso-7-else |
4ed46869 KH |
4754 | |
4755 | The category for a coding system which has the same code range | |
df7492f9 | 4756 | as ISO2022 of 7-bit environemnt but uses locking shift or |
7717c392 KH |
4757 | single shift functions. Assigned the coding-system (Lisp |
4758 | symbol) `iso-2022-7bit-lock' by default. | |
4759 | ||
4760 | o coding-category-iso-8-else | |
4761 | ||
4762 | The category for a coding system which has the same code range | |
df7492f9 | 4763 | as ISO2022 of 8-bit environemnt but uses locking shift or |
7717c392 KH |
4764 | single shift functions. Assigned the coding-system (Lisp |
4765 | symbol) `iso-2022-8bit-ss2' by default. | |
4ed46869 KH |
4766 | |
4767 | o coding-category-big5 | |
4768 | ||
4769 | The category for a coding system which has the same code range | |
4770 | as BIG5. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 4771 | `cn-big5' by default. |
4ed46869 | 4772 | |
fa42c37f KH |
4773 | o coding-category-utf-8 |
4774 | ||
4775 | The category for a coding system which has the same code range | |
4776 | as UTF-8 (cf. RFC2279). Assigned the coding-system (Lisp | |
4777 | symbol) `utf-8' by default. | |
4778 | ||
4779 | o coding-category-utf-16-be | |
4780 | ||
4781 | The category for a coding system in which a text has an | |
4782 | Unicode signature (cf. Unicode Standard) in the order of BIG | |
4783 | endian at the head. Assigned the coding-system (Lisp symbol) | |
4784 | `utf-16-be' by default. | |
4785 | ||
4786 | o coding-category-utf-16-le | |
4787 | ||
4788 | The category for a coding system in which a text has an | |
4789 | Unicode signature (cf. Unicode Standard) in the order of | |
4790 | LITTLE endian at the head. Assigned the coding-system (Lisp | |
4791 | symbol) `utf-16-le' by default. | |
4792 | ||
1397dc18 KH |
4793 | o coding-category-ccl |
4794 | ||
4795 | The category for a coding system of which encoder/decoder is | |
4796 | written in CCL programs. The default value is nil, i.e., no | |
4797 | coding system is assigned. | |
4798 | ||
4ed46869 KH |
4799 | o coding-category-binary |
4800 | ||
4801 | The category for a coding system not categorized in any of the | |
4802 | above. Assigned the coding-system (Lisp symbol) | |
e0e989f6 | 4803 | `no-conversion' by default. |
4ed46869 KH |
4804 | |
4805 | Each of them is a Lisp symbol and the value is an actual | |
df7492f9 | 4806 | `coding-system's (this is also a Lisp symbol) assigned by a user. |
4ed46869 KH |
4807 | What Emacs does actually is to detect a category of coding system. |
4808 | Then, it uses a `coding-system' assigned to it. If Emacs can't | |
df7492f9 | 4809 | decide only one possible category, it selects a category of the |
4ed46869 KH |
4810 | highest priority. Priorities of categories are also specified by a |
4811 | user in a Lisp variable `coding-category-list'. | |
4812 | ||
4813 | */ | |
4814 | ||
df7492f9 KH |
4815 | #define EOL_SEEN_NONE 0 |
4816 | #define EOL_SEEN_LF 1 | |
4817 | #define EOL_SEEN_CR 2 | |
4818 | #define EOL_SEEN_CRLF 4 | |
4ed46869 | 4819 | |
df7492f9 KH |
4820 | /* Detect how end-of-line of a text of length CODING->src_bytes |
4821 | pointed by CODING->source is encoded. Return one of | |
4822 | EOL_SEEN_XXX. */ | |
4ed46869 | 4823 | |
bc4bc72a RS |
4824 | #define MAX_EOL_CHECK_COUNT 3 |
4825 | ||
d46c5b12 | 4826 | static int |
df7492f9 KH |
4827 | detect_eol (coding, source, src_bytes) |
4828 | struct coding_system *coding; | |
d46c5b12 | 4829 | unsigned char *source; |
df7492f9 | 4830 | EMACS_INT src_bytes; |
4ed46869 | 4831 | { |
df7492f9 | 4832 | Lisp_Object attrs, coding_type; |
d46c5b12 | 4833 | unsigned char *src = source, *src_end = src + src_bytes; |
4ed46869 | 4834 | unsigned char c; |
df7492f9 KH |
4835 | int total = 0; |
4836 | int eol_seen = EOL_SEEN_NONE; | |
4ed46869 | 4837 | |
df7492f9 KH |
4838 | attrs = CODING_ID_ATTRS (coding->id); |
4839 | coding_type = CODING_ATTR_TYPE (attrs); | |
d46c5b12 | 4840 | |
df7492f9 | 4841 | if (EQ (coding_type, Qccl)) |
4ed46869 | 4842 | { |
df7492f9 | 4843 | int msb, lsb; |
fa42c37f | 4844 | |
df7492f9 KH |
4845 | msb = coding->spec.utf_16.endian == utf_16_little_endian; |
4846 | lsb = 1 - msb; | |
fa42c37f | 4847 | |
df7492f9 | 4848 | while (src + 1 < src_end) |
fa42c37f | 4849 | { |
df7492f9 KH |
4850 | c = src[lsb]; |
4851 | if (src[msb] == 0 && (c == '\n' || c == '\r')) | |
fa42c37f | 4852 | { |
df7492f9 KH |
4853 | int this_eol; |
4854 | ||
4855 | if (c == '\n') | |
4856 | this_eol = EOL_SEEN_LF; | |
4857 | else if (src + 3 >= src_end | |
4858 | || src[msb + 2] != 0 | |
4859 | || src[lsb + 2] != '\n') | |
4860 | this_eol = EOL_SEEN_CR; | |
fa42c37f | 4861 | else |
df7492f9 KH |
4862 | this_eol = EOL_SEEN_CRLF; |
4863 | ||
4864 | if (eol_seen == EOL_SEEN_NONE) | |
4865 | /* This is the first end-of-line. */ | |
4866 | eol_seen = this_eol; | |
4867 | else if (eol_seen != this_eol) | |
fa42c37f | 4868 | { |
df7492f9 KH |
4869 | /* The found type is different from what found before. */ |
4870 | eol_seen = EOL_SEEN_LF; | |
4871 | break; | |
fa42c37f | 4872 | } |
df7492f9 KH |
4873 | if (++total == MAX_EOL_CHECK_COUNT) |
4874 | break; | |
fa42c37f | 4875 | } |
df7492f9 | 4876 | src += 2; |
fa42c37f | 4877 | } |
df7492f9 | 4878 | } |
d46c5b12 | 4879 | else |
27901516 | 4880 | { |
df7492f9 | 4881 | while (src < src_end) |
27901516 | 4882 | { |
df7492f9 KH |
4883 | c = *src++; |
4884 | if (c == '\n' || c == '\r') | |
4885 | { | |
4886 | int this_eol; | |
d46c5b12 | 4887 | |
df7492f9 KH |
4888 | if (c == '\n') |
4889 | this_eol = EOL_SEEN_LF; | |
4890 | else if (src >= src_end || *src != '\n') | |
4891 | this_eol = EOL_SEEN_CR; | |
4892 | else | |
4893 | this_eol = EOL_SEEN_CRLF, src++; | |
d46c5b12 | 4894 | |
df7492f9 KH |
4895 | if (eol_seen == EOL_SEEN_NONE) |
4896 | /* This is the first end-of-line. */ | |
4897 | eol_seen = this_eol; | |
4898 | else if (eol_seen != this_eol) | |
4899 | { | |
4900 | /* The found type is different from what found before. */ | |
4901 | eol_seen = EOL_SEEN_LF; | |
4902 | break; | |
4903 | } | |
4904 | if (++total == MAX_EOL_CHECK_COUNT) | |
4905 | break; | |
4906 | } | |
4907 | } | |
73be902c | 4908 | } |
df7492f9 | 4909 | return eol_seen; |
73be902c KH |
4910 | } |
4911 | ||
df7492f9 | 4912 | |
73be902c | 4913 | static void |
df7492f9 KH |
4914 | adjust_coding_eol_type (coding, eol_seen) |
4915 | struct coding_system *coding; | |
4916 | int eol_seen; | |
73be902c | 4917 | { |
0be8721c | 4918 | Lisp_Object eol_type; |
df7492f9 KH |
4919 | |
4920 | eol_type = CODING_ID_EOL_TYPE (coding->id); | |
4921 | if (eol_seen & EOL_SEEN_LF) | |
4922 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 0)); | |
4923 | else if (eol_type & EOL_SEEN_CRLF) | |
4924 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 1)); | |
4925 | else if (eol_type & EOL_SEEN_CR) | |
4926 | coding->id = CODING_SYSTEM_ID (AREF (eol_type, 2)); | |
d46c5b12 KH |
4927 | } |
4928 | ||
df7492f9 KH |
4929 | /* Detect how a text specified in CODING is encoded. If a coding |
4930 | system is detected, update fields of CODING by the detected coding | |
4931 | system. */ | |
4932 | ||
4933 | void | |
4934 | detect_coding (coding) | |
d46c5b12 | 4935 | struct coding_system *coding; |
d46c5b12 | 4936 | { |
df7492f9 KH |
4937 | unsigned char *src, *src_end; |
4938 | Lisp_Object attrs, coding_type; | |
d46c5b12 | 4939 | |
df7492f9 KH |
4940 | coding->consumed = coding->consumed_char = 0; |
4941 | coding->produced = coding->produced_char = 0; | |
4942 | coding_set_source (coding); | |
1c3478b0 | 4943 | |
df7492f9 | 4944 | src_end = coding->source + coding->src_bytes; |
1c3478b0 | 4945 | |
df7492f9 KH |
4946 | /* If we have not yet decided the text encoding type, detect it |
4947 | now. */ | |
4948 | if (EQ (CODING_ATTR_TYPE (CODING_ID_ATTRS (coding->id)), Qundecided)) | |
b73bfc1c | 4949 | { |
df7492f9 KH |
4950 | int mask = CATEGORY_MASK_ANY; |
4951 | int c, i; | |
4952 | ||
4953 | for (src = coding->source; src < src_end; src++) | |
4954 | { | |
4955 | c = *src; | |
4956 | if (c & 0x80 || (c < 0x20 && (c == ISO_CODE_ESC | |
4957 | || c == ISO_CODE_SI | |
4958 | || c == ISO_CODE_SO))) | |
4959 | break; | |
4960 | } | |
4961 | coding->head_ascii = src - (coding->source + coding->consumed); | |
4962 | ||
4963 | if (coding->head_ascii < coding->src_bytes) | |
1c3478b0 | 4964 | { |
df7492f9 KH |
4965 | int detected = 0; |
4966 | ||
4967 | for (i = 0; i < coding_category_raw_text; i++) | |
1c3478b0 | 4968 | { |
df7492f9 KH |
4969 | enum coding_category category = coding_priorities[i]; |
4970 | struct coding_system *this = coding_categories + category; | |
4971 | ||
4972 | if (category >= coding_category_raw_text | |
4973 | || detected & (1 << category)) | |
4974 | continue; | |
4975 | ||
4976 | if (this->id < 0) | |
1c3478b0 | 4977 | { |
df7492f9 KH |
4978 | /* No coding system of this category is defined. */ |
4979 | mask &= ~(1 << category); | |
4980 | } | |
4981 | else | |
4982 | { | |
4983 | detected |= detected_mask[category]; | |
4984 | if ((*(this->detector)) (coding, &mask)) | |
4985 | break; | |
1c3478b0 KH |
4986 | } |
4987 | } | |
df7492f9 KH |
4988 | if (! mask) |
4989 | setup_coding_system (Qraw_text, coding); | |
4990 | else if (mask != CATEGORY_MASK_ANY) | |
4991 | for (i = 0; i < coding_category_raw_text; i++) | |
4992 | { | |
4993 | enum coding_category category = coding_priorities[i]; | |
4994 | struct coding_system *this = coding_categories + category; | |
4995 | ||
4996 | if (mask & (1 << category)) | |
4997 | { | |
4998 | setup_coding_system (CODING_ID_NAME (this->id), coding); | |
4999 | break; | |
5000 | } | |
5001 | } | |
1c3478b0 | 5002 | } |
b73bfc1c | 5003 | } |
69f76525 | 5004 | |
df7492f9 KH |
5005 | attrs = CODING_ID_ATTRS (coding->id); |
5006 | coding_type = CODING_ATTR_TYPE (attrs); | |
5007 | ||
5008 | /* If we have not yet decided the EOL type, detect it now. But, the | |
5009 | detection is impossible for a CCL based coding system, in which | |
5010 | case, we detct the EOL type after decoding. */ | |
5011 | if (VECTORP (CODING_ID_EOL_TYPE (coding->id)) | |
5012 | && ! EQ (coding_type, Qccl)) | |
d46c5b12 | 5013 | { |
df7492f9 KH |
5014 | int eol_seen = detect_eol (coding, coding->source, coding->src_bytes); |
5015 | ||
5016 | if (eol_seen != EOL_SEEN_NONE) | |
5017 | adjust_coding_eol_type (coding, eol_seen); | |
d46c5b12 | 5018 | } |
4ed46869 KH |
5019 | } |
5020 | ||
aaaf0b1e KH |
5021 | |
5022 | static void | |
df7492f9 | 5023 | decode_eol (coding) |
aaaf0b1e | 5024 | struct coding_system *coding; |
aaaf0b1e | 5025 | { |
df7492f9 | 5026 | if (VECTORP (CODING_ID_EOL_TYPE (coding->id))) |
aaaf0b1e | 5027 | { |
df7492f9 KH |
5028 | unsigned char *p = CHAR_POS_ADDR (coding->dst_pos); |
5029 | unsigned char *pend = p + coding->produced; | |
5030 | int eol_seen = EOL_SEEN_NONE; | |
aaaf0b1e | 5031 | |
df7492f9 | 5032 | for (; p < pend; p++) |
aaaf0b1e | 5033 | { |
df7492f9 KH |
5034 | if (*p == '\n') |
5035 | eol_seen |= EOL_SEEN_LF; | |
5036 | else if (*p == '\r') | |
aaaf0b1e | 5037 | { |
df7492f9 | 5038 | if (p + 1 < pend && *(p + 1) == '\n') |
aaaf0b1e | 5039 | { |
df7492f9 KH |
5040 | eol_seen |= EOL_SEEN_CRLF; |
5041 | p++; | |
aaaf0b1e | 5042 | } |
aaaf0b1e | 5043 | else |
df7492f9 | 5044 | eol_seen |= EOL_SEEN_CR; |
aaaf0b1e | 5045 | } |
aaaf0b1e | 5046 | } |
df7492f9 KH |
5047 | if (eol_seen != EOL_SEEN_NONE) |
5048 | adjust_coding_eol_type (coding, eol_seen); | |
aaaf0b1e | 5049 | } |
aaaf0b1e | 5050 | |
df7492f9 KH |
5051 | if (EQ (CODING_ID_EOL_TYPE (coding->id), Qmac)) |
5052 | { | |
5053 | unsigned char *p = CHAR_POS_ADDR (coding->dst_pos); | |
5054 | unsigned char *pend = p + coding->produced; | |
5055 | ||
5056 | for (; p < pend; p++) | |
5057 | if (*p == '\r') | |
5058 | *p = '\n'; | |
5059 | } | |
5060 | else if (EQ (CODING_ID_EOL_TYPE (coding->id), Qdos)) | |
5061 | { | |
5062 | unsigned char *p, *pbeg, *pend; | |
5063 | Lisp_Object undo_list; | |
5064 | ||
5065 | move_gap_both (coding->dst_pos + coding->produced_char, | |
5066 | coding->dst_pos_byte + coding->produced); | |
5067 | undo_list = current_buffer->undo_list; | |
5068 | current_buffer->undo_list = Qt; | |
5069 | del_range_2 (coding->dst_pos, coding->dst_pos_byte, GPT, GPT_BYTE, Qnil); | |
5070 | current_buffer->undo_list = undo_list; | |
5071 | pbeg = GPT_ADDR; | |
5072 | pend = pbeg + coding->produced; | |
5073 | ||
5074 | for (p = pend - 1; p >= pbeg; p--) | |
5075 | if (*p == '\r') | |
5076 | { | |
5077 | safe_bcopy ((char *) (p + 1), (char *) p, pend - p - 1); | |
5078 | pend--; | |
5079 | } | |
5080 | coding->produced_char -= coding->produced - (pend - pbeg); | |
5081 | coding->produced = pend - pbeg; | |
5082 | insert_from_gap (coding->produced_char, coding->produced); | |
aaaf0b1e KH |
5083 | } |
5084 | } | |
5085 | ||
df7492f9 KH |
5086 | static void |
5087 | translate_chars (coding, table) | |
4ed46869 | 5088 | struct coding_system *coding; |
df7492f9 | 5089 | Lisp_Object table; |
4ed46869 | 5090 | { |
df7492f9 KH |
5091 | int *charbuf = coding->charbuf; |
5092 | int *charbuf_end = charbuf + coding->charbuf_used; | |
5093 | int c; | |
5094 | ||
5095 | if (coding->chars_at_source) | |
5096 | return; | |
4ed46869 | 5097 | |
df7492f9 | 5098 | while (charbuf < charbuf_end) |
8844fa83 | 5099 | { |
df7492f9 KH |
5100 | c = *charbuf; |
5101 | if (c < 0) | |
5102 | charbuf += c; | |
5103 | else | |
5104 | *charbuf++ = translate_char (table, c); | |
8844fa83 | 5105 | } |
df7492f9 | 5106 | } |
4ed46869 | 5107 | |
df7492f9 KH |
5108 | static int |
5109 | produce_chars (coding) | |
5110 | struct coding_system *coding; | |
5111 | { | |
5112 | unsigned char *dst = coding->destination + coding->produced; | |
5113 | unsigned char *dst_end = coding->destination + coding->dst_bytes; | |
5114 | int produced; | |
5115 | int produced_chars = 0; | |
b73bfc1c | 5116 | |
df7492f9 | 5117 | if (! coding->chars_at_source) |
4ed46869 | 5118 | { |
df7492f9 KH |
5119 | /* Characters are in coding->charbuf. */ |
5120 | int *buf = coding->charbuf; | |
5121 | int *buf_end = buf + coding->charbuf_used; | |
5122 | unsigned char *adjusted_dst_end; | |
4ed46869 | 5123 | |
df7492f9 KH |
5124 | if (BUFFERP (coding->src_object) |
5125 | && EQ (coding->src_object, coding->dst_object)) | |
5126 | dst_end = coding->source + coding->consumed; | |
5127 | adjusted_dst_end = dst_end - MAX_MULTIBYTE_LENGTH; | |
4ed46869 | 5128 | |
df7492f9 KH |
5129 | while (buf < buf_end) |
5130 | { | |
5131 | int c = *buf++; | |
5132 | ||
5133 | if (dst >= adjusted_dst_end) | |
5134 | { | |
5135 | dst = alloc_destination (coding, | |
5136 | buf_end - buf + MAX_MULTIBYTE_LENGTH, | |
5137 | dst); | |
5138 | dst_end = coding->destination + coding->dst_bytes; | |
5139 | adjusted_dst_end = dst_end - MAX_MULTIBYTE_LENGTH; | |
5140 | } | |
5141 | if (c >= 0) | |
5142 | { | |
5143 | if (coding->dst_multibyte | |
5144 | || ! CHAR_BYTE8_P (c)) | |
5145 | CHAR_STRING_ADVANCE (c, dst); | |
5146 | else | |
5147 | *dst++ = CHAR_TO_BYTE8 (c); | |
5148 | produced_chars++; | |
5149 | } | |
5150 | else | |
5151 | /* This is an annotation data. */ | |
5152 | buf -= c + 1; | |
5153 | } | |
5154 | } | |
5155 | else | |
5156 | { | |
df7492f9 KH |
5157 | unsigned char *src = coding->source; |
5158 | unsigned char *src_end = src + coding->src_bytes; | |
5159 | Lisp_Object eol_type; | |
b73bfc1c | 5160 | |
df7492f9 | 5161 | eol_type = CODING_ID_EOL_TYPE (coding->id); |
4ed46869 | 5162 | |
df7492f9 | 5163 | if (coding->src_multibyte != coding->dst_multibyte) |
aaaf0b1e | 5164 | { |
df7492f9 KH |
5165 | if (coding->src_multibyte) |
5166 | { | |
71c81426 | 5167 | int multibytep = 1; |
df7492f9 | 5168 | int consumed_chars; |
d46c5b12 | 5169 | |
df7492f9 KH |
5170 | while (1) |
5171 | { | |
5172 | unsigned char *src_base = src; | |
5173 | int c; | |
b73bfc1c | 5174 | |
df7492f9 KH |
5175 | ONE_MORE_BYTE (c); |
5176 | if (c == '\r') | |
5177 | { | |
5178 | if (EQ (eol_type, Qdos)) | |
5179 | { | |
5180 | if (src < src_end | |
5181 | && *src == '\n') | |
5182 | c = *src++; | |
5183 | } | |
5184 | else if (EQ (eol_type, Qmac)) | |
5185 | c = '\n'; | |
5186 | } | |
5187 | if (dst == dst_end) | |
5188 | { | |
2c78b7e1 | 5189 | coding->consumed = src - coding->source; |
b73bfc1c | 5190 | |
2c78b7e1 KH |
5191 | if (EQ (coding->src_object, coding->dst_object)) |
5192 | dst_end = src; | |
5193 | if (dst == dst_end) | |
5194 | { | |
5195 | dst = alloc_destination (coding, src_end - src + 1, | |
5196 | dst); | |
5197 | dst_end = coding->destination + coding->dst_bytes; | |
5198 | coding_set_source (coding); | |
5199 | src = coding->source + coding->consumed; | |
5200 | src_end = coding->source + coding->src_bytes; | |
5201 | } | |
df7492f9 KH |
5202 | } |
5203 | *dst++ = c; | |
5204 | produced_chars++; | |
5205 | } | |
5206 | no_more_source: | |
5207 | ; | |
5208 | } | |
5209 | else | |
5210 | while (src < src_end) | |
5211 | { | |
71c81426 | 5212 | int multibytep = 1; |
df7492f9 | 5213 | int c = *src++; |
b73bfc1c | 5214 | |
df7492f9 KH |
5215 | if (c == '\r') |
5216 | { | |
5217 | if (EQ (eol_type, Qdos)) | |
5218 | { | |
5219 | if (src < src_end | |
5220 | && *src == '\n') | |
5221 | c = *src++; | |
5222 | } | |
5223 | else if (EQ (eol_type, Qmac)) | |
5224 | c = '\n'; | |
5225 | } | |
5226 | if (dst >= dst_end - 1) | |
5227 | { | |
2c78b7e1 | 5228 | coding->consumed = src - coding->source; |
df7492f9 | 5229 | |
2c78b7e1 KH |
5230 | if (EQ (coding->src_object, coding->dst_object)) |
5231 | dst_end = src; | |
5232 | if (dst >= dst_end - 1) | |
5233 | { | |
5234 | dst = alloc_destination (coding, src_end - src + 2, | |
5235 | dst); | |
5236 | dst_end = coding->destination + coding->dst_bytes; | |
5237 | coding_set_source (coding); | |
5238 | src = coding->source + coding->consumed; | |
5239 | src_end = coding->source + coding->src_bytes; | |
5240 | } | |
df7492f9 KH |
5241 | } |
5242 | EMIT_ONE_BYTE (c); | |
5243 | } | |
d46c5b12 | 5244 | } |
df7492f9 KH |
5245 | else |
5246 | { | |
5247 | if (!EQ (coding->src_object, coding->dst_object)) | |
5248 | { | |
5249 | int require = coding->src_bytes - coding->dst_bytes; | |
4ed46869 | 5250 | |
df7492f9 KH |
5251 | if (require > 0) |
5252 | { | |
5253 | EMACS_INT offset = src - coding->source; | |
5254 | ||
5255 | dst = alloc_destination (coding, require, dst); | |
5256 | coding_set_source (coding); | |
5257 | src = coding->source + offset; | |
5258 | src_end = coding->source + coding->src_bytes; | |
5259 | } | |
5260 | } | |
5261 | produced_chars = coding->src_chars; | |
5262 | while (src < src_end) | |
5263 | { | |
5264 | int c = *src++; | |
5265 | ||
5266 | if (c == '\r') | |
5267 | { | |
5268 | if (EQ (eol_type, Qdos)) | |
5269 | { | |
5270 | if (src < src_end | |
5271 | && *src == '\n') | |
5272 | c = *src++; | |
5273 | produced_chars--; | |
5274 | } | |
5275 | else if (EQ (eol_type, Qmac)) | |
5276 | c = '\n'; | |
5277 | } | |
5278 | *dst++ = c; | |
5279 | } | |
5280 | } | |
2c78b7e1 KH |
5281 | coding->consumed = coding->src_bytes; |
5282 | coding->consumed_char = coding->src_chars; | |
b73bfc1c | 5283 | } |
4ed46869 | 5284 | |
df7492f9 KH |
5285 | produced = dst - (coding->destination + coding->produced); |
5286 | if (BUFFERP (coding->dst_object)) | |
5287 | insert_from_gap (produced_chars, produced); | |
5288 | coding->produced += produced; | |
5289 | coding->produced_char += produced_chars; | |
5290 | return produced_chars; | |
b73bfc1c | 5291 | } |
52d41803 | 5292 | |
df7492f9 KH |
5293 | /* [ -LENGTH CHAR_POS_OFFSET MASK METHOD COMP_LEN ] |
5294 | or | |
5295 | [ -LENGTH CHAR_POS_OFFSET MASK METHOD COMP_LEN COMPONENTS... ] | |
5296 | */ | |
4ed46869 | 5297 | |
df7492f9 KH |
5298 | static INLINE void |
5299 | produce_composition (coding, charbuf) | |
4ed46869 | 5300 | struct coding_system *coding; |
df7492f9 | 5301 | int *charbuf; |
4ed46869 | 5302 | { |
df7492f9 KH |
5303 | Lisp_Object buffer; |
5304 | int len; | |
5305 | EMACS_INT pos; | |
5306 | enum composition_method method; | |
5307 | int cmp_len; | |
5308 | Lisp_Object components; | |
5309 | ||
5310 | buffer = coding->dst_object; | |
5311 | len = -charbuf[0]; | |
5312 | pos = coding->dst_pos + charbuf[1]; | |
5313 | method = (enum composition_method) (charbuf[3]); | |
5314 | cmp_len = charbuf[4]; | |
5315 | ||
5316 | if (method == COMPOSITION_RELATIVE) | |
5317 | components = Qnil; | |
5318 | else | |
d46c5b12 | 5319 | { |
df7492f9 KH |
5320 | Lisp_Object args[MAX_COMPOSITION_COMPONENTS * 2 - 1]; |
5321 | int i; | |
4ed46869 | 5322 | |
df7492f9 KH |
5323 | len -= 5; |
5324 | charbuf += 5; | |
5325 | for (i = 0; i < len; i++) | |
5326 | args[i] = make_number (charbuf[i]); | |
5327 | components = (method == COMPOSITION_WITH_ALTCHARS | |
5328 | ? Fstring (len, args) : Fvector (len, args)); | |
5329 | } | |
5330 | compose_text (pos, pos + cmp_len, components, Qnil, Qnil); | |
5331 | } | |
b73bfc1c | 5332 | |
df7492f9 KH |
5333 | static int * |
5334 | save_composition_data (buf, buf_end, prop) | |
5335 | int *buf, *buf_end; | |
5336 | Lisp_Object prop; | |
5337 | { | |
5338 | enum composition_method method = COMPOSITION_METHOD (prop); | |
5339 | int cmp_len = COMPOSITION_LENGTH (prop); | |
4ed46869 | 5340 | |
df7492f9 KH |
5341 | if (buf + 4 + (MAX_COMPOSITION_COMPONENTS * 2 - 1) > buf_end) |
5342 | return NULL; | |
d46c5b12 | 5343 | |
df7492f9 KH |
5344 | buf[1] = CODING_ANNOTATE_COMPOSITION_MASK; |
5345 | buf[2] = method; | |
5346 | buf[3] = cmp_len; | |
b73bfc1c | 5347 | |
df7492f9 KH |
5348 | if (method == COMPOSITION_RELATIVE) |
5349 | buf[0] = 4; | |
5350 | else | |
b73bfc1c | 5351 | { |
df7492f9 KH |
5352 | Lisp_Object components; |
5353 | int len, i; | |
b73bfc1c | 5354 | |
df7492f9 KH |
5355 | components = COMPOSITION_COMPONENTS (prop); |
5356 | if (VECTORP (components)) | |
d46c5b12 | 5357 | { |
df7492f9 KH |
5358 | len = XVECTOR (components)->size; |
5359 | for (i = 0; i < len; i++) | |
5360 | buf[4 + i] = XINT (AREF (components, i)); | |
5361 | } | |
5362 | else if (STRINGP (components)) | |
5363 | { | |
5364 | int i_byte; | |
b73bfc1c | 5365 | |
df7492f9 KH |
5366 | len = XSTRING (components)->size; |
5367 | i = i_byte = 0; | |
5368 | while (i < len) | |
5369 | FETCH_STRING_CHAR_ADVANCE (buf[4 + i], components, i, i_byte); | |
5370 | } | |
5371 | else if (INTEGERP (components)) | |
5372 | { | |
5373 | len = 1; | |
5374 | buf[4] = XINT (components); | |
5375 | } | |
5376 | else if (CONSP (components)) | |
5377 | { | |
5378 | for (len = 0; CONSP (components); | |
5379 | len++, components = XCDR (components)) | |
5380 | buf[4 + len] = XINT (XCAR (components)); | |
d46c5b12 | 5381 | } |
df7492f9 KH |
5382 | else |
5383 | abort (); | |
5384 | buf[0] = 4 + len; | |
4ed46869 | 5385 | } |
df7492f9 | 5386 | return (buf + buf[0]); |
4ed46869 KH |
5387 | } |
5388 | ||
df7492f9 KH |
5389 | #define CHARBUF_SIZE 0x4000 |
5390 | ||
5391 | #define ALLOC_CONVERSION_WORK_AREA(coding) \ | |
5392 | do { \ | |
5393 | int size = CHARBUF_SIZE;; \ | |
5394 | \ | |
5395 | coding->charbuf = NULL; \ | |
5396 | while (size > 1024) \ | |
5397 | { \ | |
5398 | coding->charbuf = (int *) alloca (sizeof (int) * size); \ | |
5399 | if (coding->charbuf) \ | |
5400 | break; \ | |
5401 | size >>= 1; \ | |
5402 | } \ | |
5403 | if (! coding->charbuf) \ | |
5404 | { \ | |
5405 | coding->result = CODING_RESULT_INSUFFICIENT_MEM; \ | |
5406 | return coding->result; \ | |
5407 | } \ | |
5408 | coding->charbuf_size = size; \ | |
5409 | } while (0) | |
4ed46869 | 5410 | |
d46c5b12 KH |
5411 | |
5412 | static void | |
df7492f9 | 5413 | produce_annotation (coding) |
d46c5b12 | 5414 | struct coding_system *coding; |
d46c5b12 | 5415 | { |
df7492f9 KH |
5416 | int *charbuf = coding->charbuf; |
5417 | int *charbuf_end = charbuf + coding->charbuf_used; | |
d46c5b12 | 5418 | |
df7492f9 | 5419 | while (charbuf < charbuf_end) |
d46c5b12 | 5420 | { |
df7492f9 KH |
5421 | if (*charbuf >= 0) |
5422 | charbuf++; | |
d46c5b12 | 5423 | else |
d46c5b12 | 5424 | { |
df7492f9 KH |
5425 | int len = -*charbuf; |
5426 | switch (charbuf[2]) | |
5427 | { | |
5428 | case CODING_ANNOTATE_COMPOSITION_MASK: | |
5429 | produce_composition (coding, charbuf); | |
5430 | break; | |
5431 | default: | |
5432 | abort (); | |
5433 | } | |
5434 | charbuf += len; | |
d46c5b12 | 5435 | } |
df7492f9 KH |
5436 | } |
5437 | } | |
d46c5b12 | 5438 | |
df7492f9 KH |
5439 | /* Decode the data at CODING->src_object into CODING->dst_object. |
5440 | CODING->src_object is a buffer, a string, or nil. | |
5441 | CODING->dst_object is a buffer. | |
de79a6a5 | 5442 | |
df7492f9 KH |
5443 | If CODING->src_object is a buffer, it must be the current buffer. |
5444 | In this case, if CODING->src_pos is positive, it is a position of | |
5445 | the source text in the buffer, otherwise, the source text is in the | |
5446 | gap area of the buffer, and CODING->src_pos specifies the offset of | |
5447 | the text from GPT (which must be the same as PT). If this is the | |
5448 | same buffer as CODING->dst_object, CODING->src_pos must be | |
5449 | negative. | |
b73bfc1c | 5450 | |
df7492f9 KH |
5451 | If CODING->src_object is a string, CODING->src_pos in an index to |
5452 | that string. | |
d46c5b12 | 5453 | |
df7492f9 KH |
5454 | If CODING->src_object is nil, CODING->source must already point to |
5455 | the non-relocatable memory area. In this case, CODING->src_pos is | |
5456 | an offset from CODING->source. | |
d46c5b12 | 5457 | |
df7492f9 KH |
5458 | The decoded data is inserted at the current point of the buffer |
5459 | CODING->dst_object. | |
5460 | */ | |
5461 | ||
5462 | static int | |
5463 | decode_coding (coding) | |
d46c5b12 | 5464 | struct coding_system *coding; |
d46c5b12 | 5465 | { |
df7492f9 | 5466 | Lisp_Object attrs; |
d46c5b12 | 5467 | |
df7492f9 KH |
5468 | if (BUFFERP (coding->src_object) |
5469 | && coding->src_pos > 0 | |
5470 | && coding->src_pos < GPT | |
5471 | && coding->src_pos + coding->src_chars > GPT) | |
5472 | move_gap_both (coding->src_pos, coding->src_pos_byte); | |
d46c5b12 | 5473 | |
df7492f9 | 5474 | if (BUFFERP (coding->dst_object)) |
88993dfd | 5475 | { |
df7492f9 KH |
5476 | if (current_buffer != XBUFFER (coding->dst_object)) |
5477 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
5478 | if (GPT != PT) | |
5479 | move_gap_both (PT, PT_BYTE); | |
88993dfd KH |
5480 | } |
5481 | ||
df7492f9 KH |
5482 | coding->consumed = coding->consumed_char = 0; |
5483 | coding->produced = coding->produced_char = 0; | |
5484 | coding->chars_at_source = 0; | |
5485 | coding->result = CODING_RESULT_SUCCESS; | |
5486 | coding->errors = 0; | |
5487 | ||
5488 | ALLOC_CONVERSION_WORK_AREA (coding); | |
5489 | ||
5490 | attrs = CODING_ID_ATTRS (coding->id); | |
5491 | ||
5492 | do | |
d46c5b12 | 5493 | { |
df7492f9 KH |
5494 | coding_set_source (coding); |
5495 | coding->annotated = 0; | |
5496 | (*(coding->decoder)) (coding); | |
5497 | if (!NILP (CODING_ATTR_DECODE_TBL (attrs))) | |
5498 | translate_chars (CODING_ATTR_DECODE_TBL (attrs), coding); | |
5499 | coding_set_destination (coding); | |
5500 | produce_chars (coding); | |
5501 | if (coding->annotated) | |
5502 | produce_annotation (coding); | |
d46c5b12 | 5503 | } |
df7492f9 KH |
5504 | while (coding->consumed < coding->src_bytes |
5505 | && ! coding->result); | |
d46c5b12 | 5506 | |
df7492f9 KH |
5507 | if (EQ (CODING_ATTR_TYPE (CODING_ID_ATTRS (coding->id)), Qccl) |
5508 | && SYMBOLP (CODING_ID_EOL_TYPE (coding->id)) | |
5509 | && ! EQ (CODING_ID_EOL_TYPE (coding->id), Qunix)) | |
5510 | decode_eol (coding); | |
d46c5b12 | 5511 | |
df7492f9 KH |
5512 | coding->carryover_bytes = 0; |
5513 | if (coding->consumed < coding->src_bytes) | |
d46c5b12 | 5514 | { |
df7492f9 KH |
5515 | int nbytes = coding->src_bytes - coding->consumed; |
5516 | unsigned char *src; | |
5517 | ||
5518 | coding_set_source (coding); | |
5519 | coding_set_destination (coding); | |
5520 | src = coding->source + coding->consumed; | |
5521 | ||
5522 | if (coding->mode & CODING_MODE_LAST_BLOCK) | |
d46c5b12 | 5523 | { |
df7492f9 KH |
5524 | /* Flush out unprocessed data as binary chars. We are sure |
5525 | that the number of data is less than the size of | |
5526 | coding->charbuf. */ | |
5527 | int *charbuf = coding->charbuf; | |
5528 | ||
5529 | while (nbytes-- > 0) | |
d46c5b12 | 5530 | { |
df7492f9 KH |
5531 | int c = *src++; |
5532 | *charbuf++ = (c & 0x80 ? - c : c); | |
d46c5b12 | 5533 | } |
df7492f9 | 5534 | produce_chars (coding); |
d46c5b12 | 5535 | } |
d46c5b12 | 5536 | else |
df7492f9 KH |
5537 | { |
5538 | /* Record unprocessed bytes in coding->carryover. We are | |
5539 | sure that the number of data is less than the size of | |
5540 | coding->carryover. */ | |
5541 | unsigned char *p = coding->carryover; | |
5542 | ||
5543 | coding->carryover_bytes = nbytes; | |
5544 | while (nbytes-- > 0) | |
5545 | *p++ = *src++; | |
5546 | } | |
5547 | coding->consumed = coding->src_bytes; | |
5548 | } | |
b73bfc1c | 5549 | |
df7492f9 | 5550 | return coding->result; |
d46c5b12 KH |
5551 | } |
5552 | ||
df7492f9 KH |
5553 | static void |
5554 | consume_chars (coding) | |
5555 | struct coding_system *coding; | |
5556 | { | |
5557 | int *buf = coding->charbuf; | |
5558 | /* -1 is to compensate for CRLF. */ | |
5559 | int *buf_end = coding->charbuf + coding->charbuf_size - 1; | |
5560 | unsigned char *src = coding->source + coding->consumed; | |
5561 | int pos = coding->src_pos + coding->consumed_char; | |
5562 | int end_pos = coding->src_pos + coding->src_chars; | |
5563 | int multibytep = coding->src_multibyte; | |
5564 | Lisp_Object eol_type; | |
5565 | int c; | |
5566 | int start, end, stop; | |
5567 | Lisp_Object object, prop; | |
88993dfd | 5568 | |
df7492f9 KH |
5569 | eol_type = CODING_ID_EOL_TYPE (coding->id); |
5570 | if (VECTORP (eol_type)) | |
5571 | eol_type = Qunix; | |
88993dfd | 5572 | |
df7492f9 | 5573 | object = coding->src_object; |
b843d1ae | 5574 | |
df7492f9 KH |
5575 | /* Note: composition handling is not yet implemented. */ |
5576 | coding->common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
ec6d2bb8 | 5577 | |
df7492f9 KH |
5578 | if (coding->common_flags & CODING_ANNOTATE_COMPOSITION_MASK |
5579 | && find_composition (pos, end_pos, &start, &end, &prop, object) | |
5580 | && end <= end_pos | |
5581 | && (start >= pos | |
5582 | || (find_composition (end, end_pos, &start, &end, &prop, object) | |
5583 | && end <= end_pos))) | |
5584 | stop = start; | |
5585 | else | |
5586 | stop = end_pos; | |
ec6d2bb8 | 5587 | |
df7492f9 | 5588 | while (buf < buf_end) |
ec6d2bb8 | 5589 | { |
df7492f9 | 5590 | if (pos == stop) |
ec6d2bb8 | 5591 | { |
df7492f9 | 5592 | int *p; |
ec6d2bb8 | 5593 | |
df7492f9 KH |
5594 | if (pos == end_pos) |
5595 | break; | |
5596 | p = save_composition_data (buf, buf_end, prop); | |
5597 | if (p == NULL) | |
5598 | break; | |
5599 | buf = p; | |
5600 | if (find_composition (end, end_pos, &start, &end, &prop, object) | |
5601 | && end <= end_pos) | |
5602 | stop = start; | |
5603 | else | |
5604 | stop = end_pos; | |
5605 | } | |
5606 | ||
5607 | if (! multibytep) | |
5608 | c = *src++; | |
5609 | else | |
5610 | c = STRING_CHAR_ADVANCE (src); | |
5611 | if ((c == '\r') && (coding->mode & CODING_MODE_SELECTIVE_DISPLAY)) | |
5612 | c = '\n'; | |
5613 | if (! EQ (eol_type, Qunix)) | |
5614 | { | |
5615 | if (c == '\n') | |
5616 | { | |
5617 | if (EQ (eol_type, Qdos)) | |
5618 | *buf++ = '\r'; | |
5619 | else | |
5620 | c = '\r'; | |
ec6d2bb8 | 5621 | } |
ec6d2bb8 | 5622 | } |
df7492f9 KH |
5623 | *buf++ = c; |
5624 | pos++; | |
ec6d2bb8 | 5625 | } |
ec6d2bb8 | 5626 | |
df7492f9 KH |
5627 | coding->consumed = src - coding->source; |
5628 | coding->consumed_char = pos - coding->src_pos; | |
5629 | coding->charbuf_used = buf - coding->charbuf; | |
5630 | coding->chars_at_source = 0; | |
ec6d2bb8 KH |
5631 | } |
5632 | ||
ec6d2bb8 | 5633 | |
df7492f9 KH |
5634 | /* Encode the text at CODING->src_object into CODING->dst_object. |
5635 | CODING->src_object is a buffer or a string. | |
5636 | CODING->dst_object is a buffer or nil. | |
5637 | ||
5638 | If CODING->src_object is a buffer, it must be the current buffer. | |
5639 | In this case, if CODING->src_pos is positive, it is a position of | |
5640 | the source text in the buffer, otherwise. the source text is in the | |
5641 | gap area of the buffer, and coding->src_pos specifies the offset of | |
5642 | the text from GPT (which must be the same as PT). If this is the | |
5643 | same buffer as CODING->dst_object, CODING->src_pos must be | |
5644 | negative and CODING should not have `pre-write-conversion'. | |
5645 | ||
5646 | If CODING->src_object is a string, CODING should not have | |
5647 | `pre-write-conversion'. | |
5648 | ||
5649 | If CODING->dst_object is a buffer, the encoded data is inserted at | |
5650 | the current point of that buffer. | |
5651 | ||
5652 | If CODING->dst_object is nil, the encoded data is placed at the | |
5653 | memory area specified by CODING->destination. */ | |
5654 | ||
5655 | static int | |
5656 | encode_coding (coding) | |
ec6d2bb8 | 5657 | struct coding_system *coding; |
ec6d2bb8 | 5658 | { |
df7492f9 | 5659 | Lisp_Object attrs; |
ec6d2bb8 | 5660 | |
df7492f9 | 5661 | attrs = CODING_ID_ATTRS (coding->id); |
ec6d2bb8 | 5662 | |
df7492f9 | 5663 | if (BUFFERP (coding->dst_object)) |
ec6d2bb8 | 5664 | { |
df7492f9 KH |
5665 | set_buffer_internal (XBUFFER (coding->dst_object)); |
5666 | coding->dst_multibyte | |
5667 | = ! NILP (current_buffer->enable_multibyte_characters); | |
5668 | } | |
ec6d2bb8 | 5669 | |
df7492f9 KH |
5670 | coding->consumed = coding->consumed_char = 0; |
5671 | coding->produced = coding->produced_char = 0; | |
5672 | coding->result = CODING_RESULT_SUCCESS; | |
5673 | coding->errors = 0; | |
ec6d2bb8 | 5674 | |
df7492f9 | 5675 | ALLOC_CONVERSION_WORK_AREA (coding); |
ec6d2bb8 | 5676 | |
df7492f9 KH |
5677 | do { |
5678 | coding_set_source (coding); | |
5679 | consume_chars (coding); | |
5680 | ||
5681 | if (!NILP (CODING_ATTR_ENCODE_TBL (attrs))) | |
5682 | translate_chars (CODING_ATTR_ENCODE_TBL (attrs), coding); | |
5683 | ||
5684 | coding_set_destination (coding); | |
5685 | (*(coding->encoder)) (coding); | |
5686 | } while (coding->consumed_char < coding->src_chars); | |
5687 | ||
5688 | if (BUFFERP (coding->dst_object)) | |
5689 | insert_from_gap (coding->produced_char, coding->produced); | |
5690 | ||
5691 | return (coding->result); | |
ec6d2bb8 KH |
5692 | } |
5693 | ||
df7492f9 | 5694 | /* Work buffer */ |
fb88bf2d | 5695 | |
df7492f9 KH |
5696 | /* List of currently used working buffer. */ |
5697 | Lisp_Object Vcode_conversion_work_buf_list; | |
d46c5b12 | 5698 | |
df7492f9 KH |
5699 | /* A working buffer used by the top level conversion. */ |
5700 | Lisp_Object Vcode_conversion_reused_work_buf; | |
b73bfc1c | 5701 | |
4ed46869 | 5702 | |
df7492f9 KH |
5703 | /* Return a working buffer that can be freely used by the following |
5704 | code conversion. MULTIBYTEP specifies the multibyteness of the | |
5705 | buffer. */ | |
b73bfc1c | 5706 | |
df7492f9 KH |
5707 | Lisp_Object |
5708 | make_conversion_work_buffer (multibytep) | |
5709 | int multibytep; | |
5710 | { | |
5711 | struct buffer *current = current_buffer; | |
5712 | Lisp_Object buf; | |
d46c5b12 | 5713 | |
df7492f9 | 5714 | if (NILP (Vcode_conversion_work_buf_list)) |
e133c8fa | 5715 | { |
df7492f9 KH |
5716 | if (NILP (Vcode_conversion_reused_work_buf)) |
5717 | Vcode_conversion_reused_work_buf | |
5718 | = Fget_buffer_create (build_string (" *code-conversion-work*")); | |
5719 | Vcode_conversion_work_buf_list | |
5720 | = Fcons (Vcode_conversion_reused_work_buf, Qnil); | |
e133c8fa | 5721 | } |
df7492f9 | 5722 | else |
d46c5b12 | 5723 | { |
df7492f9 KH |
5724 | int depth = Flength (Vcode_conversion_work_buf_list); |
5725 | char str[128]; | |
e077cc80 | 5726 | |
df7492f9 KH |
5727 | sprintf (str, " *code-conversion-work*<%d>", depth); |
5728 | Vcode_conversion_work_buf_list | |
5729 | = Fcons (Fget_buffer_create (build_string (str)), | |
5730 | Vcode_conversion_work_buf_list); | |
d46c5b12 | 5731 | } |
d46c5b12 | 5732 | |
df7492f9 KH |
5733 | buf = XCAR (Vcode_conversion_work_buf_list); |
5734 | set_buffer_internal (XBUFFER (buf)); | |
5735 | current_buffer->undo_list = Qt; | |
5736 | Ferase_buffer (); | |
5737 | Fset_buffer_multibyte (multibytep ? Qt : Qnil); | |
5738 | set_buffer_internal (current); | |
5739 | return buf; | |
5740 | } | |
d46c5b12 | 5741 | |
df7492f9 | 5742 | static struct coding_system *saved_coding; |
d46c5b12 | 5743 | |
df7492f9 KH |
5744 | Lisp_Object |
5745 | code_conversion_restore (info) | |
5746 | Lisp_Object info; | |
5747 | { | |
5748 | int depth = Flength (Vcode_conversion_work_buf_list); | |
5749 | Lisp_Object buf; | |
d46c5b12 | 5750 | |
df7492f9 | 5751 | if (depth > 0) |
d46c5b12 | 5752 | { |
df7492f9 KH |
5753 | buf = XCAR (Vcode_conversion_work_buf_list); |
5754 | Vcode_conversion_work_buf_list = XCDR (Vcode_conversion_work_buf_list); | |
5755 | if (depth > 1 && !NILP (Fbuffer_live_p (buf))) | |
5756 | Fkill_buffer (buf); | |
5757 | } | |
d46c5b12 | 5758 | |
df7492f9 KH |
5759 | if (saved_coding->dst_object == Qt |
5760 | && saved_coding->destination) | |
5761 | xfree (saved_coding->destination); | |
b843d1ae | 5762 | |
df7492f9 KH |
5763 | return save_excursion_restore (info); |
5764 | } | |
d46c5b12 | 5765 | |
12410ef1 | 5766 | |
df7492f9 KH |
5767 | int |
5768 | decode_coding_gap (coding, chars, bytes) | |
5769 | struct coding_system *coding; | |
5770 | EMACS_INT chars, bytes; | |
5771 | { | |
5772 | int count = specpdl_ptr - specpdl; | |
fb88bf2d | 5773 | |
df7492f9 KH |
5774 | saved_coding = coding; |
5775 | record_unwind_protect (code_conversion_restore, save_excursion_save ()); | |
ec6d2bb8 | 5776 | |
df7492f9 KH |
5777 | coding->src_object = Fcurrent_buffer (); |
5778 | coding->src_chars = chars; | |
5779 | coding->src_bytes = bytes; | |
5780 | coding->src_pos = -chars; | |
5781 | coding->src_pos_byte = -bytes; | |
5782 | coding->src_multibyte = chars < bytes; | |
5783 | coding->dst_object = coding->src_object; | |
5784 | coding->dst_pos = PT; | |
5785 | coding->dst_pos_byte = PT_BYTE; | |
71c81426 | 5786 | coding->dst_multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
4956c225 | 5787 | |
df7492f9 KH |
5788 | if (CODING_REQUIRE_DETECTION (coding)) |
5789 | detect_coding (coding); | |
5790 | ||
5791 | decode_coding (coding); | |
d46c5b12 | 5792 | |
df7492f9 KH |
5793 | unbind_to (count, Qnil); |
5794 | return coding->result; | |
5795 | } | |
d46c5b12 | 5796 | |
df7492f9 KH |
5797 | int |
5798 | encode_coding_gap (coding, chars, bytes) | |
5799 | struct coding_system *coding; | |
5800 | EMACS_INT chars, bytes; | |
5801 | { | |
5802 | int count = specpdl_ptr - specpdl; | |
5803 | Lisp_Object buffer; | |
d46c5b12 | 5804 | |
df7492f9 KH |
5805 | saved_coding = coding; |
5806 | record_unwind_protect (code_conversion_restore, save_excursion_save ()); | |
fb88bf2d | 5807 | |
df7492f9 KH |
5808 | buffer = Fcurrent_buffer (); |
5809 | coding->src_object = buffer; | |
5810 | coding->src_chars = chars; | |
5811 | coding->src_bytes = bytes; | |
5812 | coding->src_pos = -chars; | |
5813 | coding->src_pos_byte = -bytes; | |
5814 | coding->src_multibyte = chars < bytes; | |
5815 | coding->dst_object = coding->src_object; | |
5816 | coding->dst_pos = PT; | |
5817 | coding->dst_pos_byte = PT_BYTE; | |
fb88bf2d | 5818 | |
df7492f9 | 5819 | encode_coding (coding); |
f2558efd | 5820 | |
df7492f9 KH |
5821 | unbind_to (count, Qnil); |
5822 | return coding->result; | |
5823 | } | |
b73bfc1c | 5824 | |
d46c5b12 | 5825 | |
df7492f9 KH |
5826 | /* Decode the text in the range FROM/FROM_BYTE and TO/TO_BYTE in |
5827 | SRC_OBJECT into DST_OBJECT by coding context CODING. | |
ec6d2bb8 | 5828 | |
df7492f9 | 5829 | SRC_OBJECT is a buffer, a string, or Qnil. |
ec6d2bb8 | 5830 | |
df7492f9 KH |
5831 | If it is a buffer, the text is at point of the buffer. FROM and TO |
5832 | are positions in the buffer. | |
ec6d2bb8 | 5833 | |
df7492f9 KH |
5834 | If it is a string, the text is at the beginning of the string. |
5835 | FROM and TO are indices to the string. | |
ec6d2bb8 | 5836 | |
df7492f9 KH |
5837 | If it is nil, the text is at coding->source. FROM and TO are |
5838 | indices to coding->source. | |
ec6d2bb8 | 5839 | |
df7492f9 | 5840 | DST_OBJECT is a buffer, Qt, or Qnil. |
d46c5b12 | 5841 | |
df7492f9 KH |
5842 | If it is a buffer, the decoded text is inserted at point of the |
5843 | buffer. If the buffer is the same as SRC_OBJECT, the source text | |
5844 | is deleted. | |
d46c5b12 | 5845 | |
df7492f9 KH |
5846 | If it is Qt, a string is made from the decoded text, and |
5847 | set in CODING->dst_object. | |
d46c5b12 | 5848 | |
df7492f9 KH |
5849 | If it is Qnil, the decoded text is stored at CODING->destination. |
5850 | The called must allocate CODING->dst_bytes bytes at | |
5851 | CODING->destination by xmalloc. If the decoded text is longer than | |
5852 | CODING->dst_bytes, CODING->destination is relocated by xrealloc. | |
5853 | */ | |
d46c5b12 | 5854 | |
df7492f9 KH |
5855 | void |
5856 | decode_coding_object (coding, src_object, from, from_byte, to, to_byte, | |
5857 | dst_object) | |
5858 | struct coding_system *coding; | |
5859 | Lisp_Object src_object; | |
5860 | EMACS_INT from, from_byte, to, to_byte; | |
5861 | Lisp_Object dst_object; | |
5862 | { | |
5863 | int count = specpdl_ptr - specpdl; | |
5864 | unsigned char *destination; | |
5865 | EMACS_INT dst_bytes; | |
5866 | EMACS_INT chars = to - from; | |
5867 | EMACS_INT bytes = to_byte - from_byte; | |
5868 | Lisp_Object attrs; | |
d46c5b12 | 5869 | |
df7492f9 KH |
5870 | saved_coding = coding; |
5871 | record_unwind_protect (code_conversion_restore, save_excursion_save ()); | |
93dec019 | 5872 | |
df7492f9 KH |
5873 | if (NILP (dst_object)) |
5874 | { | |
5875 | destination = coding->destination; | |
5876 | dst_bytes = coding->dst_bytes; | |
5877 | } | |
93dec019 | 5878 | |
df7492f9 KH |
5879 | coding->src_object = src_object; |
5880 | coding->src_chars = chars; | |
5881 | coding->src_bytes = bytes; | |
5882 | coding->src_multibyte = chars < bytes; | |
70ad9fc4 | 5883 | |
df7492f9 KH |
5884 | if (STRINGP (src_object)) |
5885 | { | |
5886 | coding->src_pos = from; | |
5887 | coding->src_pos_byte = from_byte; | |
5888 | } | |
5889 | else if (BUFFERP (src_object)) | |
5890 | { | |
5891 | set_buffer_internal (XBUFFER (src_object)); | |
5892 | if (from != GPT) | |
5893 | move_gap_both (from, from_byte); | |
5894 | if (EQ (src_object, dst_object)) | |
fb88bf2d | 5895 | { |
df7492f9 KH |
5896 | TEMP_SET_PT_BOTH (from, from_byte); |
5897 | del_range_both (from, from_byte, to, to_byte, 1); | |
5898 | coding->src_pos = -chars; | |
5899 | coding->src_pos_byte = -bytes; | |
fb88bf2d | 5900 | } |
df7492f9 | 5901 | else |
fb88bf2d | 5902 | { |
df7492f9 KH |
5903 | coding->src_pos = from; |
5904 | coding->src_pos_byte = from_byte; | |
fb88bf2d | 5905 | } |
d46c5b12 | 5906 | } |
fb88bf2d | 5907 | |
df7492f9 KH |
5908 | if (CODING_REQUIRE_DETECTION (coding)) |
5909 | detect_coding (coding); | |
5910 | attrs = CODING_ID_ATTRS (coding->id); | |
5911 | ||
5912 | if (! NILP (CODING_ATTR_POST_READ (attrs)) | |
5913 | || EQ (dst_object, Qt)) | |
b73bfc1c | 5914 | { |
df7492f9 KH |
5915 | coding->dst_object = make_conversion_work_buffer (1); |
5916 | coding->dst_pos = BEG; | |
5917 | coding->dst_pos_byte = BEG_BYTE; | |
5918 | coding->dst_multibyte = 1; | |
b73bfc1c | 5919 | } |
df7492f9 | 5920 | else if (BUFFERP (dst_object)) |
12410ef1 | 5921 | { |
df7492f9 KH |
5922 | coding->dst_object = dst_object; |
5923 | coding->dst_pos = BUF_PT (XBUFFER (dst_object)); | |
5924 | coding->dst_pos_byte = BUF_PT_BYTE (XBUFFER (dst_object)); | |
5925 | coding->dst_multibyte | |
5926 | = ! NILP (XBUFFER (dst_object)->enable_multibyte_characters); | |
12410ef1 | 5927 | } |
72d1a715 | 5928 | else |
df7492f9 KH |
5929 | { |
5930 | coding->dst_object = Qnil; | |
5931 | coding->dst_multibyte = 1; | |
5932 | } | |
5933 | ||
5934 | decode_coding (coding); | |
4ed46869 | 5935 | |
df7492f9 KH |
5936 | if (BUFFERP (coding->dst_object)) |
5937 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
ec6d2bb8 | 5938 | |
df7492f9 | 5939 | if (! NILP (CODING_ATTR_POST_READ (attrs))) |
d46c5b12 | 5940 | { |
df7492f9 KH |
5941 | struct gcpro gcpro1, gcpro2; |
5942 | EMACS_INT prev_Z = Z, prev_Z_BYTE = Z_BYTE; | |
2b4f9037 | 5943 | Lisp_Object val; |
4ed46869 | 5944 | |
c0cc7f7f | 5945 | TEMP_SET_PT_BOTH (coding->dst_pos, coding->dst_pos_byte); |
df7492f9 KH |
5946 | GCPRO2 (coding->src_object, coding->dst_object); |
5947 | val = call1 (CODING_ATTR_POST_READ (attrs), | |
5948 | make_number (coding->produced_char)); | |
5949 | UNGCPRO; | |
5950 | CHECK_NATNUM (val); | |
5951 | coding->produced_char += Z - prev_Z; | |
5952 | coding->produced += Z_BYTE - prev_Z_BYTE; | |
d46c5b12 | 5953 | } |
4ed46869 | 5954 | |
df7492f9 | 5955 | if (EQ (dst_object, Qt)) |
ec6d2bb8 | 5956 | { |
df7492f9 KH |
5957 | coding->dst_object = Fbuffer_string (); |
5958 | } | |
5959 | else if (NILP (dst_object) && BUFFERP (coding->dst_object)) | |
5960 | { | |
5961 | set_buffer_internal (XBUFFER (coding->dst_object)); | |
5962 | if (dst_bytes < coding->produced) | |
5963 | { | |
5964 | destination | |
5965 | = (unsigned char *) xrealloc (destination, coding->produced); | |
5966 | if (! destination) | |
5967 | { | |
5968 | coding->result = CODING_RESULT_INSUFFICIENT_DST; | |
5969 | unbind_to (count, Qnil); | |
5970 | return; | |
5971 | } | |
5972 | if (BEGV < GPT && GPT < BEGV + coding->produced_char) | |
5973 | move_gap_both (BEGV, BEGV_BYTE); | |
5974 | bcopy (BEGV_ADDR, destination, coding->produced); | |
5975 | coding->destination = destination; | |
5976 | } | |
ec6d2bb8 | 5977 | } |
2b4f9037 | 5978 | |
df7492f9 | 5979 | unbind_to (count, Qnil); |
d46c5b12 KH |
5980 | } |
5981 | ||
df7492f9 KH |
5982 | |
5983 | void | |
5984 | encode_coding_object (coding, src_object, from, from_byte, to, to_byte, | |
5985 | dst_object) | |
b73bfc1c | 5986 | struct coding_system *coding; |
df7492f9 KH |
5987 | Lisp_Object src_object; |
5988 | EMACS_INT from, from_byte, to, to_byte; | |
5989 | Lisp_Object dst_object; | |
b73bfc1c KH |
5990 | { |
5991 | int count = specpdl_ptr - specpdl; | |
df7492f9 KH |
5992 | EMACS_INT chars = to - from; |
5993 | EMACS_INT bytes = to_byte - from_byte; | |
5994 | Lisp_Object attrs; | |
5995 | ||
5996 | saved_coding = coding; | |
5997 | record_unwind_protect (code_conversion_restore, save_excursion_save ()); | |
5998 | ||
5999 | coding->src_object = src_object; | |
6000 | coding->src_chars = chars; | |
6001 | coding->src_bytes = bytes; | |
6002 | coding->src_multibyte = chars < bytes; | |
6003 | ||
6004 | attrs = CODING_ID_ATTRS (coding->id); | |
6005 | ||
6006 | if (! NILP (CODING_ATTR_PRE_WRITE (attrs))) | |
6bac5b12 | 6007 | { |
df7492f9 KH |
6008 | coding->src_object = make_conversion_work_buffer (coding->src_multibyte); |
6009 | set_buffer_internal (XBUFFER (coding->src_object)); | |
6010 | if (STRINGP (src_object)) | |
6011 | insert_from_string (src_object, from, from_byte, chars, bytes, 0); | |
6012 | else if (BUFFERP (src_object)) | |
6013 | insert_from_buffer (XBUFFER (src_object), from, chars, 0); | |
6014 | else | |
6015 | insert_1_both (coding->source + from, chars, bytes, 0, 0, 0); | |
6016 | ||
6017 | if (EQ (src_object, dst_object)) | |
6018 | { | |
6019 | set_buffer_internal (XBUFFER (src_object)); | |
6020 | del_range_both (from, from_byte, to, to_byte, 1); | |
6021 | set_buffer_internal (XBUFFER (coding->src_object)); | |
6022 | } | |
6023 | ||
ac87bbef KH |
6024 | call2 (CODING_ATTR_PRE_WRITE (attrs), |
6025 | make_number (BEG), make_number (Z)); | |
6026 | coding->src_object = Fcurrent_buffer (); | |
df7492f9 KH |
6027 | if (BEG != GPT) |
6028 | move_gap_both (BEG, BEG_BYTE); | |
6029 | coding->src_chars = Z - BEG; | |
6030 | coding->src_bytes = Z_BYTE - BEG_BYTE; | |
6031 | coding->src_pos = BEG; | |
6032 | coding->src_pos_byte = BEG_BYTE; | |
6033 | coding->src_multibyte = Z < Z_BYTE; | |
6034 | } | |
6035 | else if (STRINGP (src_object)) | |
6036 | { | |
6037 | coding->src_pos = from; | |
6038 | coding->src_pos_byte = from_byte; | |
6039 | } | |
6040 | else if (BUFFERP (src_object)) | |
d46c5b12 | 6041 | { |
df7492f9 KH |
6042 | set_buffer_internal (XBUFFER (src_object)); |
6043 | if (from != GPT) | |
6044 | move_gap_both (from, from_byte); | |
6045 | if (EQ (src_object, dst_object)) | |
d46c5b12 | 6046 | { |
df7492f9 KH |
6047 | del_range_both (from, from_byte, to, to_byte, 1); |
6048 | coding->src_pos = -chars; | |
6049 | coding->src_pos_byte = -bytes; | |
d46c5b12 | 6050 | } |
df7492f9 | 6051 | else |
d46c5b12 | 6052 | { |
df7492f9 KH |
6053 | coding->src_pos = from; |
6054 | coding->src_pos_byte = from_byte; | |
d46c5b12 KH |
6055 | } |
6056 | } | |
4ed46869 | 6057 | |
df7492f9 | 6058 | if (BUFFERP (dst_object)) |
d46c5b12 | 6059 | { |
df7492f9 KH |
6060 | coding->dst_object = dst_object; |
6061 | coding->dst_pos = BUF_PT (XBUFFER (dst_object)); | |
6062 | coding->dst_pos_byte = BUF_PT_BYTE (XBUFFER (dst_object)); | |
6063 | coding->dst_multibyte | |
6064 | = ! NILP (XBUFFER (dst_object)->enable_multibyte_characters); | |
b73bfc1c | 6065 | } |
df7492f9 | 6066 | else if (EQ (dst_object, Qt)) |
4956c225 | 6067 | { |
df7492f9 | 6068 | coding->dst_object = Qnil; |
df7492f9 | 6069 | coding->dst_bytes = coding->src_chars; |
ac87bbef KH |
6070 | if (coding->dst_bytes == 0) |
6071 | coding->dst_bytes = 1; | |
6072 | coding->destination = (unsigned char *) xmalloc (coding->dst_bytes); | |
df7492f9 | 6073 | coding->dst_multibyte = 0; |
4956c225 | 6074 | } |
df7492f9 | 6075 | else |
78108bcd | 6076 | { |
df7492f9 KH |
6077 | coding->dst_object = Qnil; |
6078 | coding->dst_multibyte = 0; | |
78108bcd KH |
6079 | } |
6080 | ||
df7492f9 | 6081 | encode_coding (coding); |
4ed46869 | 6082 | |
df7492f9 | 6083 | if (EQ (dst_object, Qt)) |
4ed46869 | 6084 | { |
df7492f9 KH |
6085 | if (BUFFERP (coding->dst_object)) |
6086 | coding->dst_object = Fbuffer_string (); | |
6087 | else | |
73be902c | 6088 | { |
df7492f9 KH |
6089 | coding->dst_object |
6090 | = make_unibyte_string ((char *) coding->destination, | |
6091 | coding->produced); | |
6092 | xfree (coding->destination); | |
73be902c | 6093 | } |
4ed46869 | 6094 | } |
d46c5b12 | 6095 | |
df7492f9 | 6096 | unbind_to (count, Qnil); |
b73bfc1c KH |
6097 | } |
6098 | ||
df7492f9 | 6099 | |
b73bfc1c | 6100 | Lisp_Object |
df7492f9 | 6101 | preferred_coding_system () |
b73bfc1c | 6102 | { |
df7492f9 | 6103 | int id = coding_categories[coding_priorities[0]].id; |
2391eaa4 | 6104 | |
df7492f9 | 6105 | return CODING_ID_NAME (id); |
4ed46869 KH |
6106 | } |
6107 | ||
6108 | \f | |
6109 | #ifdef emacs | |
1397dc18 | 6110 | /*** 8. Emacs Lisp library functions ***/ |
4ed46869 | 6111 | |
4ed46869 | 6112 | DEFUN ("coding-system-p", Fcoding_system_p, Scoding_system_p, 1, 1, 0, |
48b0f3ae | 6113 | doc: /* Return t if OBJECT is nil or a coding-system. |
df7492f9 | 6114 | See the documentation of `define-coding-system' for information |
48b0f3ae PJ |
6115 | about coding-system objects. */) |
6116 | (obj) | |
4ed46869 KH |
6117 | Lisp_Object obj; |
6118 | { | |
df7492f9 | 6119 | return ((NILP (obj) || CODING_SYSTEM_P (obj)) ? Qt : Qnil); |
4ed46869 KH |
6120 | } |
6121 | ||
9d991de8 RS |
6122 | DEFUN ("read-non-nil-coding-system", Fread_non_nil_coding_system, |
6123 | Sread_non_nil_coding_system, 1, 1, 0, | |
48b0f3ae PJ |
6124 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. */) |
6125 | (prompt) | |
4ed46869 KH |
6126 | Lisp_Object prompt; |
6127 | { | |
e0e989f6 | 6128 | Lisp_Object val; |
9d991de8 RS |
6129 | do |
6130 | { | |
4608c386 KH |
6131 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
6132 | Qt, Qnil, Qcoding_system_history, Qnil, Qnil); | |
9d991de8 RS |
6133 | } |
6134 | while (XSTRING (val)->size == 0); | |
e0e989f6 | 6135 | return (Fintern (val, Qnil)); |
4ed46869 KH |
6136 | } |
6137 | ||
9b787f3e | 6138 | DEFUN ("read-coding-system", Fread_coding_system, Sread_coding_system, 1, 2, 0, |
48b0f3ae PJ |
6139 | doc: /* Read a coding system from the minibuffer, prompting with string PROMPT. |
6140 | If the user enters null input, return second argument DEFAULT-CODING-SYSTEM. */) | |
6141 | (prompt, default_coding_system) | |
9b787f3e | 6142 | Lisp_Object prompt, default_coding_system; |
4ed46869 | 6143 | { |
f44d27ce | 6144 | Lisp_Object val; |
9b787f3e RS |
6145 | if (SYMBOLP (default_coding_system)) |
6146 | XSETSTRING (default_coding_system, XSYMBOL (default_coding_system)->name); | |
4608c386 | 6147 | val = Fcompleting_read (prompt, Vcoding_system_alist, Qnil, |
9b787f3e RS |
6148 | Qt, Qnil, Qcoding_system_history, |
6149 | default_coding_system, Qnil); | |
e0e989f6 | 6150 | return (XSTRING (val)->size == 0 ? Qnil : Fintern (val, Qnil)); |
4ed46869 KH |
6151 | } |
6152 | ||
6153 | DEFUN ("check-coding-system", Fcheck_coding_system, Scheck_coding_system, | |
6154 | 1, 1, 0, | |
48b0f3ae PJ |
6155 | doc: /* Check validity of CODING-SYSTEM. |
6156 | If valid, return CODING-SYSTEM, else signal a `coding-system-error' error. | |
6157 | It is valid if it is a symbol with a non-nil `coding-system' property. | |
6158 | The value of property should be a vector of length 5. */) | |
df7492f9 | 6159 | (coding_system) |
4ed46869 KH |
6160 | Lisp_Object coding_system; |
6161 | { | |
b7826503 | 6162 | CHECK_SYMBOL (coding_system); |
4ed46869 KH |
6163 | if (!NILP (Fcoding_system_p (coding_system))) |
6164 | return coding_system; | |
6165 | while (1) | |
02ba4723 | 6166 | Fsignal (Qcoding_system_error, Fcons (coding_system, Qnil)); |
4ed46869 | 6167 | } |
df7492f9 | 6168 | |
3a73fa5d | 6169 | \f |
d46c5b12 | 6170 | Lisp_Object |
df7492f9 | 6171 | detect_coding_system (src, src_bytes, highest, multibytep, coding_system) |
d46c5b12 KH |
6172 | unsigned char *src; |
6173 | int src_bytes, highest; | |
0a28aafb | 6174 | int multibytep; |
df7492f9 | 6175 | Lisp_Object coding_system; |
4ed46869 | 6176 | { |
df7492f9 KH |
6177 | unsigned char *src_end = src + src_bytes; |
6178 | int mask = CATEGORY_MASK_ANY; | |
6179 | int detected = 0; | |
6180 | int c, i; | |
6181 | Lisp_Object attrs, eol_type; | |
6182 | Lisp_Object val; | |
6183 | struct coding_system coding; | |
6184 | ||
6185 | if (NILP (coding_system)) | |
6186 | coding_system = Qundecided; | |
6187 | setup_coding_system (coding_system, &coding); | |
6188 | attrs = CODING_ID_ATTRS (coding.id); | |
6189 | eol_type = CODING_ID_EOL_TYPE (coding.id); | |
4ed46869 | 6190 | |
df7492f9 KH |
6191 | coding.source = src; |
6192 | coding.src_bytes = src_bytes; | |
6193 | coding.src_multibyte = multibytep; | |
6194 | coding.consumed = 0; | |
4ed46869 | 6195 | |
df7492f9 | 6196 | if (XINT (CODING_ATTR_CATEGORY (attrs)) != coding_category_undecided) |
4ed46869 | 6197 | { |
df7492f9 | 6198 | mask = 1 << XINT (CODING_ATTR_CATEGORY (attrs)); |
4ed46869 | 6199 | } |
df7492f9 | 6200 | else |
4ed46869 | 6201 | { |
df7492f9 KH |
6202 | coding_system = Qnil; |
6203 | for (; src < src_end; src++) | |
4ed46869 | 6204 | { |
df7492f9 KH |
6205 | c = *src; |
6206 | if (c & 0x80 || (c < 0x20 && (c == ISO_CODE_ESC | |
6207 | || c == ISO_CODE_SI | |
6208 | || c == ISO_CODE_SO))) | |
d46c5b12 | 6209 | break; |
4ed46869 | 6210 | } |
df7492f9 KH |
6211 | coding.head_ascii = src - coding.source; |
6212 | ||
6213 | if (src < src_end) | |
6214 | for (i = 0; i < coding_category_raw_text; i++) | |
6215 | { | |
6216 | enum coding_category category = coding_priorities[i]; | |
6217 | struct coding_system *this = coding_categories + category; | |
6218 | ||
6219 | if (category >= coding_category_raw_text | |
6220 | || detected & (1 << category)) | |
6221 | continue; | |
6222 | ||
6223 | if (this->id < 0) | |
6224 | { | |
6225 | /* No coding system of this category is defined. */ | |
6226 | mask &= ~(1 << category); | |
6227 | } | |
6228 | else | |
6229 | { | |
6230 | detected |= detected_mask[category]; | |
6231 | if ((*(coding_categories[category].detector)) (&coding, &mask) | |
6232 | && highest) | |
6233 | { | |
6234 | mask &= detected_mask[category]; | |
6235 | break; | |
6236 | } | |
6237 | } | |
6238 | } | |
4ed46869 | 6239 | } |
4ed46869 | 6240 | |
df7492f9 KH |
6241 | if (!mask) |
6242 | val = Fcons (make_number (coding_category_raw_text), Qnil); | |
6243 | else if (mask == CATEGORY_MASK_ANY) | |
6244 | val = Fcons (make_number (coding_category_undecided), Qnil); | |
6245 | else if (highest) | |
4ed46869 | 6246 | { |
df7492f9 KH |
6247 | for (i = 0; i < coding_category_raw_text; i++) |
6248 | if (mask & (1 << coding_priorities[i])) | |
6249 | { | |
6250 | val = Fcons (make_number (coding_priorities[i]), Qnil); | |
6251 | break; | |
6252 | } | |
6253 | } | |
6254 | else | |
6255 | { | |
6256 | val = Qnil; | |
6257 | for (i = coding_category_raw_text - 1; i >= 0; i--) | |
6258 | if (mask & (1 << coding_priorities[i])) | |
6259 | val = Fcons (make_number (coding_priorities[i]), val); | |
4ed46869 | 6260 | } |
df7492f9 KH |
6261 | |
6262 | { | |
6263 | int one_byte_eol = -1, two_byte_eol = -1; | |
6264 | Lisp_Object tail; | |
6265 | ||
6266 | for (tail = val; CONSP (tail); tail = XCDR (tail)) | |
6267 | { | |
6268 | struct coding_system *this | |
6269 | = (NILP (coding_system) ? coding_categories + XINT (XCAR (tail)) | |
6270 | : &coding); | |
6271 | int this_eol; | |
6272 | ||
6273 | attrs = CODING_ID_ATTRS (this->id); | |
6274 | eol_type = CODING_ID_EOL_TYPE (this->id); | |
6275 | XSETCAR (tail, CODING_ID_NAME (this->id)); | |
6276 | if (VECTORP (eol_type)) | |
6277 | { | |
6278 | if (EQ (CODING_ATTR_TYPE (attrs), Qutf_16)) | |
6279 | { | |
6280 | if (two_byte_eol < 0) | |
6281 | two_byte_eol = detect_eol (this, coding.source, src_bytes); | |
6282 | this_eol = two_byte_eol; | |
6283 | } | |
6284 | else | |
6285 | { | |
6286 | if (one_byte_eol < 0) | |
6287 | one_byte_eol =detect_eol (this, coding.source, src_bytes); | |
6288 | this_eol = one_byte_eol; | |
6289 | } | |
6290 | if (this_eol == EOL_SEEN_LF) | |
6291 | XSETCAR (tail, AREF (eol_type, 0)); | |
6292 | else if (this_eol == EOL_SEEN_CRLF) | |
6293 | XSETCAR (tail, AREF (eol_type, 1)); | |
6294 | else if (this_eol == EOL_SEEN_CR) | |
6295 | XSETCAR (tail, AREF (eol_type, 2)); | |
6296 | } | |
6297 | } | |
6298 | } | |
6299 | ||
03699b14 | 6300 | return (highest ? XCAR (val) : val); |
93dec019 | 6301 | } |
4ed46869 | 6302 | |
df7492f9 | 6303 | |
d46c5b12 KH |
6304 | DEFUN ("detect-coding-region", Fdetect_coding_region, Sdetect_coding_region, |
6305 | 2, 3, 0, | |
48b0f3ae PJ |
6306 | doc: /* Detect coding system of the text in the region between START and END. |
6307 | Return a list of possible coding systems ordered by priority. | |
6308 | ||
6309 | If only ASCII characters are found, it returns a list of single element | |
6310 | `undecided' or its subsidiary coding system according to a detected | |
6311 | end-of-line format. | |
6312 | ||
6313 | If optional argument HIGHEST is non-nil, return the coding system of | |
6314 | highest priority. */) | |
6315 | (start, end, highest) | |
d46c5b12 KH |
6316 | Lisp_Object start, end, highest; |
6317 | { | |
6318 | int from, to; | |
6319 | int from_byte, to_byte; | |
6289dd10 | 6320 | |
b7826503 PJ |
6321 | CHECK_NUMBER_COERCE_MARKER (start); |
6322 | CHECK_NUMBER_COERCE_MARKER (end); | |
4ed46869 | 6323 | |
d46c5b12 KH |
6324 | validate_region (&start, &end); |
6325 | from = XINT (start), to = XINT (end); | |
6326 | from_byte = CHAR_TO_BYTE (from); | |
6327 | to_byte = CHAR_TO_BYTE (to); | |
6289dd10 | 6328 | |
d46c5b12 KH |
6329 | if (from < GPT && to >= GPT) |
6330 | move_gap_both (to, to_byte); | |
c210f766 | 6331 | |
d46c5b12 | 6332 | return detect_coding_system (BYTE_POS_ADDR (from_byte), |
df7492f9 | 6333 | to_byte - from_byte, |
0a28aafb KH |
6334 | !NILP (highest), |
6335 | !NILP (current_buffer | |
df7492f9 KH |
6336 | ->enable_multibyte_characters), |
6337 | Qnil); | |
d46c5b12 | 6338 | } |
6289dd10 | 6339 | |
d46c5b12 KH |
6340 | DEFUN ("detect-coding-string", Fdetect_coding_string, Sdetect_coding_string, |
6341 | 1, 2, 0, | |
48b0f3ae PJ |
6342 | doc: /* Detect coding system of the text in STRING. |
6343 | Return a list of possible coding systems ordered by priority. | |
6344 | ||
6345 | If only ASCII characters are found, it returns a list of single element | |
6346 | `undecided' or its subsidiary coding system according to a detected | |
6347 | end-of-line format. | |
6348 | ||
6349 | If optional argument HIGHEST is non-nil, return the coding system of | |
6350 | highest priority. */) | |
6351 | (string, highest) | |
d46c5b12 KH |
6352 | Lisp_Object string, highest; |
6353 | { | |
b7826503 | 6354 | CHECK_STRING (string); |
4ed46869 | 6355 | |
d46c5b12 | 6356 | return detect_coding_system (XSTRING (string)->data, |
df7492f9 | 6357 | STRING_BYTES (XSTRING (string)), |
0a28aafb | 6358 | !NILP (highest), |
df7492f9 KH |
6359 | STRING_MULTIBYTE (string), |
6360 | Qnil); | |
4ed46869 KH |
6361 | } |
6362 | ||
05e6f5dc | 6363 | |
df7492f9 KH |
6364 | static INLINE int |
6365 | char_encodable_p (c, attrs) | |
6366 | int c; | |
6367 | Lisp_Object attrs; | |
05e6f5dc | 6368 | { |
df7492f9 | 6369 | Lisp_Object tail; |
df7492f9 | 6370 | struct charset *charset; |
05e6f5dc | 6371 | |
df7492f9 KH |
6372 | for (tail = CODING_ATTR_CHARSET_LIST (attrs); |
6373 | CONSP (tail); tail = XCDR (tail)) | |
05e6f5dc | 6374 | { |
df7492f9 KH |
6375 | charset = CHARSET_FROM_ID (XINT (XCAR (tail))); |
6376 | if (CHAR_CHARSET_P (c, charset)) | |
6377 | break; | |
05e6f5dc | 6378 | } |
df7492f9 | 6379 | return (! NILP (tail)); |
05e6f5dc KH |
6380 | } |
6381 | ||
6382 | ||
df7492f9 KH |
6383 | /* Return a list of coding systems that safely encode the text between |
6384 | START and END. If EXCLUDE is non-nil, it is a list of coding | |
6385 | systems not to check. The returned list doesn't contain any such | |
6386 | coding systems. In any case, If the text contains only ASCII or is | |
6387 | unibyte, return t. */ | |
6388 | ||
6389 | DEFUN ("find-coding-systems-region-internal", | |
6390 | Ffind_coding_systems_region_internal, | |
6391 | Sfind_coding_systems_region_internal, 2, 3, 0, | |
6392 | doc: /* Internal use only. */) | |
6393 | (start, end, exclude) | |
6394 | Lisp_Object start, end, exclude; | |
6395 | { | |
6396 | Lisp_Object coding_attrs_list, safe_codings; | |
6397 | EMACS_INT start_byte, end_byte; | |
6398 | unsigned char *p, *pbeg, *pend; | |
6399 | int c; | |
6400 | Lisp_Object tail, elt; | |
05e6f5dc | 6401 | |
df7492f9 KH |
6402 | if (STRINGP (start)) |
6403 | { | |
6404 | if (!STRING_MULTIBYTE (start) | |
6405 | && XSTRING (start)->size != STRING_BYTES (XSTRING (start))) | |
6406 | return Qt; | |
6407 | start_byte = 0; | |
6408 | end_byte = STRING_BYTES (XSTRING (start)); | |
6409 | } | |
6410 | else | |
6411 | { | |
6412 | CHECK_NUMBER_COERCE_MARKER (start); | |
6413 | CHECK_NUMBER_COERCE_MARKER (end); | |
6414 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) | |
6415 | args_out_of_range (start, end); | |
6416 | if (NILP (current_buffer->enable_multibyte_characters)) | |
6417 | return Qt; | |
6418 | start_byte = CHAR_TO_BYTE (XINT (start)); | |
6419 | end_byte = CHAR_TO_BYTE (XINT (end)); | |
6420 | if (XINT (end) - XINT (start) == end_byte - start_byte) | |
6421 | return Qt; | |
05e6f5dc | 6422 | |
df7492f9 KH |
6423 | if (start < GPT && end > GPT) |
6424 | { | |
6425 | if ((GPT - start) < (end - GPT)) | |
6426 | move_gap_both (start, start_byte); | |
6427 | else | |
6428 | move_gap_both (end, end_byte); | |
6429 | } | |
6430 | } | |
05e6f5dc | 6431 | |
df7492f9 KH |
6432 | coding_attrs_list = Qnil; |
6433 | for (tail = Vcoding_system_list; CONSP (tail); tail = XCDR (tail)) | |
6434 | if (NILP (exclude) | |
6435 | || NILP (Fmemq (XCAR (tail), exclude))) | |
6436 | { | |
6437 | Lisp_Object attrs; | |
05e6f5dc | 6438 | |
df7492f9 KH |
6439 | attrs = AREF (CODING_SYSTEM_SPEC (XCAR (tail)), 0); |
6440 | if (EQ (XCAR (tail), CODING_ATTR_BASE_NAME (attrs)) | |
6441 | && ! EQ (CODING_ATTR_TYPE (attrs), Qundecided)) | |
6442 | coding_attrs_list = Fcons (attrs, coding_attrs_list); | |
6443 | } | |
6444 | ||
6445 | if (STRINGP (start)) | |
6446 | p = pbeg = XSTRING (start)->data; | |
6447 | else | |
6448 | p = pbeg = BYTE_POS_ADDR (start_byte); | |
6449 | pend = p + (end_byte - start_byte); | |
6450 | ||
6451 | while (p < pend && ASCII_BYTE_P (*p)) p++; | |
6452 | while (p < pend && ASCII_BYTE_P (*(pend - 1))) pend--; | |
05e6f5dc KH |
6453 | |
6454 | while (p < pend) | |
6455 | { | |
df7492f9 KH |
6456 | if (ASCII_BYTE_P (*p)) |
6457 | p++; | |
6458 | else | |
6459 | { | |
6460 | c = STRING_CHAR_ADVANCE (p); | |
6461 | ||
6462 | charset_map_loaded = 0; | |
6463 | for (tail = coding_attrs_list; CONSP (tail);) | |
6464 | { | |
6465 | elt = XCAR (tail); | |
6466 | if (NILP (elt)) | |
6467 | tail = XCDR (tail); | |
6468 | else if (char_encodable_p (c, elt)) | |
6469 | tail = XCDR (tail); | |
6470 | else if (CONSP (XCDR (tail))) | |
6471 | { | |
6472 | XSETCAR (tail, XCAR (XCDR (tail))); | |
6473 | XSETCDR (tail, XCDR (XCDR (tail))); | |
6474 | } | |
6475 | else | |
6476 | { | |
6477 | XSETCAR (tail, Qnil); | |
6478 | tail = XCDR (tail); | |
6479 | } | |
6480 | } | |
6481 | if (charset_map_loaded) | |
6482 | { | |
6483 | EMACS_INT p_offset = p - pbeg, pend_offset = pend - pbeg; | |
05e6f5dc | 6484 | |
df7492f9 KH |
6485 | if (STRINGP (start)) |
6486 | pbeg = XSTRING (start)->data; | |
6487 | else | |
6488 | pbeg = BYTE_POS_ADDR (start_byte); | |
6489 | p = pbeg + p_offset; | |
6490 | pend = pbeg + pend_offset; | |
6491 | } | |
6492 | } | |
05e6f5dc | 6493 | } |
df7492f9 KH |
6494 | |
6495 | safe_codings = Qnil; | |
6496 | for (tail = coding_attrs_list; CONSP (tail); tail = XCDR (tail)) | |
6497 | if (! NILP (XCAR (tail))) | |
6498 | safe_codings = Fcons (CODING_ATTR_BASE_NAME (XCAR (tail)), safe_codings); | |
6499 | ||
05e6f5dc KH |
6500 | return safe_codings; |
6501 | } | |
6502 | ||
6503 | ||
df7492f9 KH |
6504 | DEFUN ("check-coding-systems-region", Fcheck_coding_systems_region, |
6505 | Scheck_coding_systems_region, 3, 3, 0, | |
6506 | doc: /* Check if the region is encodable by coding systems. | |
05e6f5dc | 6507 | |
df7492f9 KH |
6508 | START and END are buffer positions specifying the region. |
6509 | CODING-SYSTEM-LIST is a list of coding systems to check. | |
6510 | ||
6511 | The value is an alist ((CODING-SYSTEM POS0 POS1 ...) ...), where | |
6512 | CODING-SYSTEM is a member of CODING-SYSTEM-LIst and can't encode the | |
6513 | whole region, POS0, POS1, ... are buffer positions where non-encodable | |
6514 | characters are found. | |
6515 | ||
6516 | If all coding systems in CODING-SYSTEM-LIST can encode the region, the | |
6517 | value is nil. | |
6518 | ||
6519 | START may be a string. In that case, check if the string is | |
6520 | encodable, and the value contains indices to the string instead of | |
6521 | buffer positions. END is ignored. */) | |
6522 | (start, end, coding_system_list) | |
6523 | Lisp_Object start, end, coding_system_list; | |
05e6f5dc | 6524 | { |
df7492f9 KH |
6525 | Lisp_Object list; |
6526 | EMACS_INT start_byte, end_byte; | |
6527 | int pos; | |
6528 | unsigned char *p, *pbeg, *pend; | |
6529 | int c; | |
6530 | Lisp_Object tail, elt; | |
05e6f5dc KH |
6531 | |
6532 | if (STRINGP (start)) | |
6533 | { | |
df7492f9 KH |
6534 | if (!STRING_MULTIBYTE (start) |
6535 | && XSTRING (start)->size != STRING_BYTES (XSTRING (start))) | |
6536 | return Qnil; | |
6537 | start_byte = 0; | |
6538 | end_byte = STRING_BYTES (XSTRING (start)); | |
6539 | pos = 0; | |
05e6f5dc KH |
6540 | } |
6541 | else | |
6542 | { | |
b7826503 PJ |
6543 | CHECK_NUMBER_COERCE_MARKER (start); |
6544 | CHECK_NUMBER_COERCE_MARKER (end); | |
05e6f5dc KH |
6545 | if (XINT (start) < BEG || XINT (end) > Z || XINT (start) > XINT (end)) |
6546 | args_out_of_range (start, end); | |
6547 | if (NILP (current_buffer->enable_multibyte_characters)) | |
df7492f9 KH |
6548 | return Qnil; |
6549 | start_byte = CHAR_TO_BYTE (XINT (start)); | |
6550 | end_byte = CHAR_TO_BYTE (XINT (end)); | |
6551 | if (XINT (end) - XINT (start) == end_byte - start_byte) | |
05e6f5dc | 6552 | return Qt; |
df7492f9 KH |
6553 | |
6554 | if (start < GPT && end > GPT) | |
6555 | { | |
6556 | if ((GPT - start) < (end - GPT)) | |
6557 | move_gap_both (start, start_byte); | |
6558 | else | |
6559 | move_gap_both (end, end_byte); | |
6560 | } | |
6561 | pos = start; | |
6562 | } | |
6563 | ||
6564 | list = Qnil; | |
6565 | for (tail = coding_system_list; CONSP (tail); tail = XCDR (tail)) | |
6566 | { | |
6567 | elt = XCAR (tail); | |
6568 | list = Fcons (Fcons (elt, Fcons (AREF (CODING_SYSTEM_SPEC (elt), 0), | |
6569 | Qnil)), | |
6570 | list); | |
05e6f5dc KH |
6571 | } |
6572 | ||
df7492f9 KH |
6573 | if (STRINGP (start)) |
6574 | p = pbeg = XSTRING (start)->data; | |
6575 | else | |
6576 | p = pbeg = BYTE_POS_ADDR (start_byte); | |
6577 | pend = p + (end_byte - start_byte); | |
6578 | ||
6579 | while (p < pend && ASCII_BYTE_P (*p)) p++, pos++; | |
6580 | while (p < pend && ASCII_BYTE_P (*(pend - 1))) pend--; | |
6581 | ||
6582 | while (p < pend) | |
05e6f5dc | 6583 | { |
df7492f9 KH |
6584 | if (ASCII_BYTE_P (*p)) |
6585 | p++; | |
6586 | else | |
05e6f5dc | 6587 | { |
df7492f9 KH |
6588 | c = STRING_CHAR_ADVANCE (p); |
6589 | ||
6590 | charset_map_loaded = 0; | |
6591 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
6592 | { | |
6593 | elt = XCDR (XCAR (tail)); | |
6594 | if (! char_encodable_p (c, XCAR (elt))) | |
6595 | XSETCDR (elt, Fcons (make_number (pos), XCDR (elt))); | |
6596 | } | |
6597 | if (charset_map_loaded) | |
6598 | { | |
6599 | EMACS_INT p_offset = p - pbeg, pend_offset = pend - pbeg; | |
6600 | ||
6601 | if (STRINGP (start)) | |
6602 | pbeg = XSTRING (start)->data; | |
6603 | else | |
6604 | pbeg = BYTE_POS_ADDR (start_byte); | |
6605 | p = pbeg + p_offset; | |
6606 | pend = pbeg + pend_offset; | |
6607 | } | |
05e6f5dc | 6608 | } |
df7492f9 | 6609 | pos++; |
05e6f5dc KH |
6610 | } |
6611 | ||
df7492f9 KH |
6612 | tail = list; |
6613 | list = Qnil; | |
6614 | for (; CONSP (tail); tail = XCDR (tail)) | |
05e6f5dc | 6615 | { |
df7492f9 KH |
6616 | elt = XCAR (tail); |
6617 | if (CONSP (XCDR (XCDR (elt)))) | |
6618 | list = Fcons (Fcons (XCAR (elt), Fnreverse (XCDR (XCDR (elt)))), | |
6619 | list); | |
05e6f5dc | 6620 | } |
df7492f9 KH |
6621 | |
6622 | return list; | |
05e6f5dc KH |
6623 | } |
6624 | ||
6625 | ||
df7492f9 | 6626 | |
4031e2bf | 6627 | Lisp_Object |
df7492f9 KH |
6628 | code_convert_region (start, end, coding_system, dst_object, encodep, norecord) |
6629 | Lisp_Object start, end, coding_system, dst_object; | |
6630 | int encodep, norecord; | |
3a73fa5d RS |
6631 | { |
6632 | struct coding_system coding; | |
df7492f9 KH |
6633 | EMACS_INT from, from_byte, to, to_byte; |
6634 | Lisp_Object src_object; | |
3a73fa5d | 6635 | |
b7826503 PJ |
6636 | CHECK_NUMBER_COERCE_MARKER (start); |
6637 | CHECK_NUMBER_COERCE_MARKER (end); | |
df7492f9 KH |
6638 | if (NILP (coding_system)) |
6639 | coding_system = Qno_conversion; | |
6640 | else | |
6641 | CHECK_CODING_SYSTEM (coding_system); | |
6642 | src_object = Fcurrent_buffer (); | |
6643 | if (NILP (dst_object)) | |
6644 | dst_object = src_object; | |
6645 | else if (! EQ (dst_object, Qt)) | |
6646 | CHECK_BUFFER (dst_object); | |
3a73fa5d | 6647 | |
d46c5b12 KH |
6648 | validate_region (&start, &end); |
6649 | from = XFASTINT (start); | |
df7492f9 | 6650 | from_byte = CHAR_TO_BYTE (from); |
d46c5b12 | 6651 | to = XFASTINT (end); |
df7492f9 | 6652 | to_byte = CHAR_TO_BYTE (to); |
d46c5b12 | 6653 | |
df7492f9 KH |
6654 | setup_coding_system (coding_system, &coding); |
6655 | coding.mode |= CODING_MODE_LAST_BLOCK; | |
6656 | ||
6657 | if (encodep) | |
6658 | encode_coding_object (&coding, src_object, from, from_byte, to, to_byte, | |
6659 | dst_object); | |
6660 | else | |
6661 | decode_coding_object (&coding, src_object, from, from_byte, to, to_byte, | |
6662 | dst_object); | |
6663 | if (! norecord) | |
6664 | Vlast_coding_system_used = CODING_ID_NAME (coding.id); | |
d46c5b12 | 6665 | |
df7492f9 KH |
6666 | if (coding.result != CODING_RESULT_SUCCESS) |
6667 | error ("Code conversion error: %d", coding.result); | |
3a73fa5d | 6668 | |
df7492f9 KH |
6669 | return (BUFFERP (dst_object) |
6670 | ? make_number (coding.produced_char) | |
6671 | : coding.dst_object); | |
4031e2bf KH |
6672 | } |
6673 | ||
df7492f9 | 6674 | |
4031e2bf | 6675 | DEFUN ("decode-coding-region", Fdecode_coding_region, Sdecode_coding_region, |
df7492f9 | 6676 | 3, 4, "r\nzCoding system: ", |
48b0f3ae | 6677 | doc: /* Decode the current region from the specified coding system. |
df7492f9 KH |
6678 | When called from a program, takes four arguments: |
6679 | START, END, CODING-SYSTEM, and DESTINATION. | |
6680 | START and END are buffer positions. | |
6681 | ||
6682 | Optional 4th arguments DESTINATION specifies where the decoded text goes. | |
6683 | If nil, the region between START and END is replace by the decoded text. | |
6684 | If buffer, the decoded text is inserted in the buffer. | |
6685 | If t, the decoded text is returned. | |
6686 | ||
48b0f3ae PJ |
6687 | This function sets `last-coding-system-used' to the precise coding system |
6688 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6689 | not fully specified.) | |
6690 | It returns the length of the decoded text. */) | |
df7492f9 KH |
6691 | (start, end, coding_system, destination) |
6692 | Lisp_Object start, end, coding_system, destination; | |
4031e2bf | 6693 | { |
df7492f9 | 6694 | return code_convert_region (start, end, coding_system, destination, 0, 0); |
3a73fa5d RS |
6695 | } |
6696 | ||
6697 | DEFUN ("encode-coding-region", Fencode_coding_region, Sencode_coding_region, | |
df7492f9 KH |
6698 | 3, 4, "r\nzCoding system: ", |
6699 | doc: /* Encode the current region by specified coding system. | |
48b0f3ae PJ |
6700 | When called from a program, takes three arguments: |
6701 | START, END, and CODING-SYSTEM. START and END are buffer positions. | |
df7492f9 KH |
6702 | |
6703 | Optional 4th arguments DESTINATION specifies where the encoded text goes. | |
6704 | If nil, the region between START and END is replace by the encoded text. | |
6705 | If buffer, the encoded text is inserted in the buffer. | |
6706 | If t, the encoded text is returned. | |
6707 | ||
48b0f3ae PJ |
6708 | This function sets `last-coding-system-used' to the precise coding system |
6709 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6710 | not fully specified.) | |
6711 | It returns the length of the encoded text. */) | |
df7492f9 KH |
6712 | (start, end, coding_system, destination) |
6713 | Lisp_Object start, end, coding_system, destination; | |
3a73fa5d | 6714 | { |
df7492f9 | 6715 | return code_convert_region (start, end, coding_system, destination, 1, 0); |
4031e2bf | 6716 | } |
3a73fa5d | 6717 | |
4031e2bf | 6718 | Lisp_Object |
df7492f9 KH |
6719 | code_convert_string (string, coding_system, dst_object, |
6720 | encodep, nocopy, norecord) | |
6721 | Lisp_Object string, coding_system, dst_object; | |
6722 | int encodep, nocopy, norecord; | |
4031e2bf KH |
6723 | { |
6724 | struct coding_system coding; | |
df7492f9 | 6725 | EMACS_INT chars, bytes; |
3a73fa5d | 6726 | |
b7826503 | 6727 | CHECK_STRING (string); |
d46c5b12 | 6728 | if (NILP (coding_system)) |
df7492f9 KH |
6729 | { |
6730 | if (! norecord) | |
6731 | Vlast_coding_system_used = Qno_conversion; | |
6732 | if (NILP (dst_object)) | |
6733 | return (nocopy ? Fcopy_sequence (string) : string); | |
6734 | } | |
4ed46869 | 6735 | |
df7492f9 KH |
6736 | if (NILP (coding_system)) |
6737 | coding_system = Qno_conversion; | |
6738 | else | |
6739 | CHECK_CODING_SYSTEM (coding_system); | |
6740 | if (NILP (dst_object)) | |
6741 | dst_object = Qt; | |
6742 | else if (! EQ (dst_object, Qt)) | |
6743 | CHECK_BUFFER (dst_object); | |
5f1cd180 | 6744 | |
df7492f9 | 6745 | setup_coding_system (coding_system, &coding); |
d46c5b12 | 6746 | coding.mode |= CODING_MODE_LAST_BLOCK; |
df7492f9 KH |
6747 | chars = XSTRING (string)->size; |
6748 | bytes = STRING_BYTES (XSTRING (string)); | |
6749 | if (encodep) | |
6750 | encode_coding_object (&coding, string, 0, 0, chars, bytes, dst_object); | |
6751 | else | |
6752 | decode_coding_object (&coding, string, 0, 0, chars, bytes, dst_object); | |
6753 | if (! norecord) | |
6754 | Vlast_coding_system_used = CODING_ID_NAME (coding.id); | |
ec6d2bb8 | 6755 | |
df7492f9 KH |
6756 | if (coding.result != CODING_RESULT_SUCCESS) |
6757 | error ("Code conversion error: %d", coding.result); | |
4ed46869 | 6758 | |
df7492f9 KH |
6759 | return (BUFFERP (dst_object) |
6760 | ? make_number (coding.produced_char) | |
6761 | : coding.dst_object); | |
4ed46869 KH |
6762 | } |
6763 | ||
4031e2bf | 6764 | |
ecec61c1 | 6765 | /* Encode or decode STRING according to CODING_SYSTEM. |
ec6d2bb8 KH |
6766 | Do not set Vlast_coding_system_used. |
6767 | ||
6768 | This function is called only from macros DECODE_FILE and | |
6769 | ENCODE_FILE, thus we ignore character composition. */ | |
ecec61c1 KH |
6770 | |
6771 | Lisp_Object | |
6772 | code_convert_string_norecord (string, coding_system, encodep) | |
6773 | Lisp_Object string, coding_system; | |
6774 | int encodep; | |
6775 | { | |
0be8721c | 6776 | return code_convert_string (string, coding_system, Qt, encodep, 0, 1); |
df7492f9 | 6777 | } |
ecec61c1 | 6778 | |
ecec61c1 | 6779 | |
df7492f9 KH |
6780 | DEFUN ("decode-coding-string", Fdecode_coding_string, Sdecode_coding_string, |
6781 | 2, 4, 0, | |
6782 | doc: /* Decode STRING which is encoded in CODING-SYSTEM, and return the result. | |
6783 | ||
6784 | Optional third arg NOCOPY non-nil means it is OK to return STRING itself | |
6785 | if the decoding operation is trivial. | |
ecec61c1 | 6786 | |
df7492f9 KH |
6787 | Optional fourth arg BUFFER non-nil meant that the decoded text is |
6788 | inserted in BUFFER instead of returned as a astring. In this case, | |
6789 | the return value is BUFFER. | |
ecec61c1 | 6790 | |
df7492f9 KH |
6791 | This function sets `last-coding-system-used' to the precise coding system |
6792 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6793 | not fully specified. */) | |
6794 | (string, coding_system, nocopy, buffer) | |
6795 | Lisp_Object string, coding_system, nocopy, buffer; | |
6796 | { | |
6797 | return code_convert_string (string, coding_system, buffer, | |
6798 | 0, ! NILP (nocopy), 0); | |
6799 | } | |
6800 | ||
6801 | DEFUN ("encode-coding-string", Fencode_coding_string, Sencode_coding_string, | |
6802 | 2, 4, 0, | |
6803 | doc: /* Encode STRING to CODING-SYSTEM, and return the result. | |
6804 | ||
6805 | Optional third arg NOCOPY non-nil means it is OK to return STRING | |
6806 | itself if the encoding operation is trivial. | |
6807 | ||
6808 | Optional fourth arg BUFFER non-nil meant that the encoded text is | |
6809 | inserted in BUFFER instead of returned as a astring. In this case, | |
6810 | the return value is BUFFER. | |
6811 | ||
6812 | This function sets `last-coding-system-used' to the precise coding system | |
6813 | used (which may be different from CODING-SYSTEM if CODING-SYSTEM is | |
6814 | not fully specified.) */) | |
6815 | (string, coding_system, nocopy, buffer) | |
6816 | Lisp_Object string, coding_system, nocopy, buffer; | |
6817 | { | |
6818 | return code_convert_string (string, coding_system, buffer, | |
6819 | nocopy, ! NILP (nocopy), 1); | |
ecec61c1 | 6820 | } |
df7492f9 | 6821 | |
3a73fa5d | 6822 | \f |
4ed46869 | 6823 | DEFUN ("decode-sjis-char", Fdecode_sjis_char, Sdecode_sjis_char, 1, 1, 0, |
48b0f3ae PJ |
6824 | doc: /* Decode a Japanese character which has CODE in shift_jis encoding. |
6825 | Return the corresponding character. */) | |
6826 | (code) | |
4ed46869 KH |
6827 | Lisp_Object code; |
6828 | { | |
df7492f9 KH |
6829 | Lisp_Object spec, attrs, val; |
6830 | struct charset *charset_roman, *charset_kanji, *charset_kana, *charset; | |
6831 | int c; | |
6832 | ||
6833 | CHECK_NATNUM (code); | |
6834 | c = XFASTINT (code); | |
6835 | CHECK_CODING_SYSTEM_GET_SPEC (Vsjis_coding_system, spec); | |
6836 | attrs = AREF (spec, 0); | |
4ed46869 | 6837 | |
df7492f9 KH |
6838 | if (ASCII_BYTE_P (c) |
6839 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
6840 | return code; | |
6841 | ||
6842 | val = CODING_ATTR_CHARSET_LIST (attrs); | |
6843 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
004068e4 KH |
6844 | charset_kana = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); |
6845 | charset_kanji = CHARSET_FROM_ID (XINT (XCAR (val))); | |
df7492f9 KH |
6846 | |
6847 | if (c <= 0x7F) | |
6848 | charset = charset_roman; | |
6849 | else if (c >= 0xA0 && c < 0xDF) | |
55ab7be3 | 6850 | { |
df7492f9 KH |
6851 | charset = charset_kana; |
6852 | c -= 0x80; | |
55ab7be3 KH |
6853 | } |
6854 | else | |
6855 | { | |
004068e4 | 6856 | int s1 = c >> 8, s2 = c & 0xFF; |
df7492f9 KH |
6857 | |
6858 | if (s1 < 0x81 || (s1 > 0x9F && s1 < 0xE0) || s1 > 0xEF | |
6859 | || s2 < 0x40 || s2 == 0x7F || s2 > 0xFC) | |
6860 | error ("Invalid code: %d", code); | |
6861 | SJIS_TO_JIS (c); | |
6862 | charset = charset_kanji; | |
55ab7be3 | 6863 | } |
df7492f9 KH |
6864 | c = DECODE_CHAR (charset, c); |
6865 | if (c < 0) | |
6866 | error ("Invalid code: %d", code); | |
6867 | return make_number (c); | |
4ed46869 KH |
6868 | } |
6869 | ||
df7492f9 | 6870 | |
4ed46869 | 6871 | DEFUN ("encode-sjis-char", Fencode_sjis_char, Sencode_sjis_char, 1, 1, 0, |
48b0f3ae PJ |
6872 | doc: /* Encode a Japanese character CHAR to shift_jis encoding. |
6873 | Return the corresponding code in SJIS. */) | |
6874 | (ch) | |
df7492f9 | 6875 | Lisp_Object ch; |
4ed46869 | 6876 | { |
df7492f9 KH |
6877 | Lisp_Object spec, attrs, charset_list; |
6878 | int c; | |
6879 | struct charset *charset; | |
6880 | unsigned code; | |
4ed46869 | 6881 | |
df7492f9 KH |
6882 | CHECK_CHARACTER (ch); |
6883 | c = XFASTINT (ch); | |
6884 | CHECK_CODING_SYSTEM_GET_SPEC (Vsjis_coding_system, spec); | |
6885 | attrs = AREF (spec, 0); | |
6886 | ||
6887 | if (ASCII_CHAR_P (c) | |
6888 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
6889 | return ch; | |
6890 | ||
6891 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
6892 | charset = char_charset (c, charset_list, &code); | |
6893 | if (code == CHARSET_INVALID_CODE (charset)) | |
6894 | error ("Can't encode by shift_jis encoding: %d", c); | |
6895 | JIS_TO_SJIS (code); | |
6896 | ||
6897 | return make_number (code); | |
4ed46869 KH |
6898 | } |
6899 | ||
6900 | DEFUN ("decode-big5-char", Fdecode_big5_char, Sdecode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
6901 | doc: /* Decode a Big5 character which has CODE in BIG5 coding system. |
6902 | Return the corresponding character. */) | |
6903 | (code) | |
4ed46869 KH |
6904 | Lisp_Object code; |
6905 | { | |
df7492f9 KH |
6906 | Lisp_Object spec, attrs, val; |
6907 | struct charset *charset_roman, *charset_big5, *charset; | |
6908 | int c; | |
4ed46869 | 6909 | |
df7492f9 KH |
6910 | CHECK_NATNUM (code); |
6911 | c = XFASTINT (code); | |
6912 | CHECK_CODING_SYSTEM_GET_SPEC (Vbig5_coding_system, spec); | |
6913 | attrs = AREF (spec, 0); | |
6914 | ||
6915 | if (ASCII_BYTE_P (c) | |
6916 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
6917 | return code; | |
6918 | ||
6919 | val = CODING_ATTR_CHARSET_LIST (attrs); | |
6920 | charset_roman = CHARSET_FROM_ID (XINT (XCAR (val))), val = XCDR (val); | |
6921 | charset_big5 = CHARSET_FROM_ID (XINT (XCAR (val))); | |
6922 | ||
6923 | if (c <= 0x7F) | |
6924 | charset = charset_roman; | |
c28a9453 KH |
6925 | else |
6926 | { | |
df7492f9 KH |
6927 | int b1 = c >> 8, b2 = c & 0x7F; |
6928 | if (b1 < 0xA1 || b1 > 0xFE | |
6929 | || b2 < 0x40 || (b2 > 0x7E && b2 < 0xA1) || b2 > 0xFE) | |
6930 | error ("Invalid code: %d", code); | |
6931 | charset = charset_big5; | |
c28a9453 | 6932 | } |
df7492f9 KH |
6933 | c = DECODE_CHAR (charset, (unsigned )c); |
6934 | if (c < 0) | |
6935 | error ("Invalid code: %d", code); | |
6936 | return make_number (c); | |
4ed46869 KH |
6937 | } |
6938 | ||
6939 | DEFUN ("encode-big5-char", Fencode_big5_char, Sencode_big5_char, 1, 1, 0, | |
48b0f3ae PJ |
6940 | doc: /* Encode the Big5 character CHAR to BIG5 coding system. |
6941 | Return the corresponding character code in Big5. */) | |
6942 | (ch) | |
4ed46869 KH |
6943 | Lisp_Object ch; |
6944 | { | |
df7492f9 KH |
6945 | Lisp_Object spec, attrs, charset_list; |
6946 | struct charset *charset; | |
6947 | int c; | |
6948 | unsigned code; | |
6949 | ||
6950 | CHECK_CHARACTER (ch); | |
6951 | c = XFASTINT (ch); | |
6952 | CHECK_CODING_SYSTEM_GET_SPEC (Vbig5_coding_system, spec); | |
6953 | attrs = AREF (spec, 0); | |
6954 | if (ASCII_CHAR_P (c) | |
6955 | && ! NILP (CODING_ATTR_ASCII_COMPAT (attrs))) | |
6956 | return ch; | |
6957 | ||
6958 | charset_list = CODING_ATTR_CHARSET_LIST (attrs); | |
6959 | charset = char_charset (c, charset_list, &code); | |
6960 | if (code == CHARSET_INVALID_CODE (charset)) | |
6961 | error ("Can't encode by Big5 encoding: %d", c); | |
6962 | ||
6963 | return make_number (code); | |
4ed46869 | 6964 | } |
df7492f9 | 6965 | |
3a73fa5d | 6966 | \f |
1ba9e4ab KH |
6967 | DEFUN ("set-terminal-coding-system-internal", |
6968 | Fset_terminal_coding_system_internal, | |
48b0f3ae PJ |
6969 | Sset_terminal_coding_system_internal, 1, 1, 0, |
6970 | doc: /* Internal use only. */) | |
6971 | (coding_system) | |
b74e4686 | 6972 | Lisp_Object coding_system; |
4ed46869 | 6973 | { |
b7826503 | 6974 | CHECK_SYMBOL (coding_system); |
df7492f9 KH |
6975 | setup_coding_system (Fcheck_coding_system (coding_system), |
6976 | &terminal_coding); | |
6977 | ||
70c22245 | 6978 | /* We had better not send unsafe characters to terminal. */ |
df7492f9 KH |
6979 | terminal_coding.mode |= CODING_MODE_SAFE_ENCODING; |
6980 | /* Characer composition should be disabled. */ | |
6981 | terminal_coding.common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
b73bfc1c KH |
6982 | terminal_coding.src_multibyte = 1; |
6983 | terminal_coding.dst_multibyte = 0; | |
4ed46869 KH |
6984 | return Qnil; |
6985 | } | |
6986 | ||
c4825358 KH |
6987 | DEFUN ("set-safe-terminal-coding-system-internal", |
6988 | Fset_safe_terminal_coding_system_internal, | |
48b0f3ae | 6989 | Sset_safe_terminal_coding_system_internal, 1, 1, 0, |
ddb67bdc | 6990 | doc: /* Internal use only. */) |
48b0f3ae | 6991 | (coding_system) |
b74e4686 | 6992 | Lisp_Object coding_system; |
c4825358 | 6993 | { |
b7826503 | 6994 | CHECK_SYMBOL (coding_system); |
c4825358 KH |
6995 | setup_coding_system (Fcheck_coding_system (coding_system), |
6996 | &safe_terminal_coding); | |
df7492f9 KH |
6997 | /* Characer composition should be disabled. */ |
6998 | safe_terminal_coding.common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
b73bfc1c KH |
6999 | safe_terminal_coding.src_multibyte = 1; |
7000 | safe_terminal_coding.dst_multibyte = 0; | |
c4825358 KH |
7001 | return Qnil; |
7002 | } | |
7003 | ||
4ed46869 KH |
7004 | DEFUN ("terminal-coding-system", |
7005 | Fterminal_coding_system, Sterminal_coding_system, 0, 0, 0, | |
48b0f3ae PJ |
7006 | doc: /* Return coding system specified for terminal output. */) |
7007 | () | |
4ed46869 | 7008 | { |
df7492f9 | 7009 | return CODING_ID_NAME (terminal_coding.id); |
4ed46869 KH |
7010 | } |
7011 | ||
1ba9e4ab KH |
7012 | DEFUN ("set-keyboard-coding-system-internal", |
7013 | Fset_keyboard_coding_system_internal, | |
48b0f3ae PJ |
7014 | Sset_keyboard_coding_system_internal, 1, 1, 0, |
7015 | doc: /* Internal use only. */) | |
7016 | (coding_system) | |
4ed46869 KH |
7017 | Lisp_Object coding_system; |
7018 | { | |
b7826503 | 7019 | CHECK_SYMBOL (coding_system); |
df7492f9 KH |
7020 | setup_coding_system (Fcheck_coding_system (coding_system), |
7021 | &keyboard_coding); | |
7022 | /* Characer composition should be disabled. */ | |
7023 | keyboard_coding.common_flags &= ~CODING_ANNOTATE_COMPOSITION_MASK; | |
4ed46869 KH |
7024 | return Qnil; |
7025 | } | |
7026 | ||
7027 | DEFUN ("keyboard-coding-system", | |
7028 | Fkeyboard_coding_system, Skeyboard_coding_system, 0, 0, 0, | |
48b0f3ae PJ |
7029 | doc: /* Return coding system specified for decoding keyboard input. */) |
7030 | () | |
4ed46869 | 7031 | { |
df7492f9 | 7032 | return CODING_ID_NAME (keyboard_coding.id); |
4ed46869 KH |
7033 | } |
7034 | ||
7035 | \f | |
a5d301df KH |
7036 | DEFUN ("find-operation-coding-system", Ffind_operation_coding_system, |
7037 | Sfind_operation_coding_system, 1, MANY, 0, | |
48b0f3ae PJ |
7038 | doc: /* Choose a coding system for an operation based on the target name. |
7039 | The value names a pair of coding systems: (DECODING-SYSTEM . ENCODING-SYSTEM). | |
7040 | DECODING-SYSTEM is the coding system to use for decoding | |
7041 | \(in case OPERATION does decoding), and ENCODING-SYSTEM is the coding system | |
7042 | for encoding (in case OPERATION does encoding). | |
7043 | ||
7044 | The first argument OPERATION specifies an I/O primitive: | |
7045 | For file I/O, `insert-file-contents' or `write-region'. | |
7046 | For process I/O, `call-process', `call-process-region', or `start-process'. | |
7047 | For network I/O, `open-network-stream'. | |
7048 | ||
7049 | The remaining arguments should be the same arguments that were passed | |
7050 | to the primitive. Depending on which primitive, one of those arguments | |
7051 | is selected as the TARGET. For example, if OPERATION does file I/O, | |
7052 | whichever argument specifies the file name is TARGET. | |
7053 | ||
7054 | TARGET has a meaning which depends on OPERATION: | |
7055 | For file I/O, TARGET is a file name. | |
7056 | For process I/O, TARGET is a process name. | |
7057 | For network I/O, TARGET is a service name or a port number | |
7058 | ||
7059 | This function looks up what specified for TARGET in, | |
7060 | `file-coding-system-alist', `process-coding-system-alist', | |
7061 | or `network-coding-system-alist' depending on OPERATION. | |
7062 | They may specify a coding system, a cons of coding systems, | |
7063 | or a function symbol to call. | |
7064 | In the last case, we call the function with one argument, | |
7065 | which is a list of all the arguments given to this function. | |
7066 | ||
7067 | usage: (find-operation-coding-system OPERATION ARGUMENTS ...) */) | |
7068 | (nargs, args) | |
4ed46869 KH |
7069 | int nargs; |
7070 | Lisp_Object *args; | |
7071 | { | |
7072 | Lisp_Object operation, target_idx, target, val; | |
7073 | register Lisp_Object chain; | |
7074 | ||
7075 | if (nargs < 2) | |
7076 | error ("Too few arguments"); | |
7077 | operation = args[0]; | |
7078 | if (!SYMBOLP (operation) | |
7079 | || !INTEGERP (target_idx = Fget (operation, Qtarget_idx))) | |
df7492f9 | 7080 | error ("Invalid first arguement"); |
4ed46869 KH |
7081 | if (nargs < 1 + XINT (target_idx)) |
7082 | error ("Too few arguments for operation: %s", | |
7083 | XSYMBOL (operation)->name->data); | |
7084 | target = args[XINT (target_idx) + 1]; | |
7085 | if (!(STRINGP (target) | |
7086 | || (EQ (operation, Qopen_network_stream) && INTEGERP (target)))) | |
df7492f9 | 7087 | error ("Invalid %dth argument", XINT (target_idx) + 1); |
4ed46869 | 7088 | |
2e34157c RS |
7089 | chain = ((EQ (operation, Qinsert_file_contents) |
7090 | || EQ (operation, Qwrite_region)) | |
02ba4723 | 7091 | ? Vfile_coding_system_alist |
2e34157c | 7092 | : (EQ (operation, Qopen_network_stream) |
02ba4723 KH |
7093 | ? Vnetwork_coding_system_alist |
7094 | : Vprocess_coding_system_alist)); | |
4ed46869 KH |
7095 | if (NILP (chain)) |
7096 | return Qnil; | |
7097 | ||
03699b14 | 7098 | for (; CONSP (chain); chain = XCDR (chain)) |
4ed46869 | 7099 | { |
f44d27ce | 7100 | Lisp_Object elt; |
4ed46869 | 7101 | |
df7492f9 | 7102 | elt = XCAR (chain); |
4ed46869 KH |
7103 | if (CONSP (elt) |
7104 | && ((STRINGP (target) | |
03699b14 KR |
7105 | && STRINGP (XCAR (elt)) |
7106 | && fast_string_match (XCAR (elt), target) >= 0) | |
7107 | || (INTEGERP (target) && EQ (target, XCAR (elt))))) | |
02ba4723 | 7108 | { |
03699b14 | 7109 | val = XCDR (elt); |
b19fd4c5 KH |
7110 | /* Here, if VAL is both a valid coding system and a valid |
7111 | function symbol, we return VAL as a coding system. */ | |
02ba4723 KH |
7112 | if (CONSP (val)) |
7113 | return val; | |
7114 | if (! SYMBOLP (val)) | |
7115 | return Qnil; | |
7116 | if (! NILP (Fcoding_system_p (val))) | |
7117 | return Fcons (val, val); | |
b19fd4c5 KH |
7118 | if (! NILP (Ffboundp (val))) |
7119 | { | |
7120 | val = call1 (val, Flist (nargs, args)); | |
7121 | if (CONSP (val)) | |
7122 | return val; | |
7123 | if (SYMBOLP (val) && ! NILP (Fcoding_system_p (val))) | |
7124 | return Fcons (val, val); | |
7125 | } | |
02ba4723 KH |
7126 | return Qnil; |
7127 | } | |
4ed46869 KH |
7128 | } |
7129 | return Qnil; | |
7130 | } | |
7131 | ||
df7492f9 KH |
7132 | DEFUN ("set-coding-system-priority", Fset_coding_system_priority, |
7133 | Sset_coding_system_priority, 1, MANY, 0, | |
1fcd6c8b DL |
7134 | doc: /* Assign higher priority to coding systems given as arguments. |
7135 | usage: (set-coding-system-priority CODING-SYSTEM ...) */) | |
df7492f9 KH |
7136 | (nargs, args) |
7137 | int nargs; | |
7138 | Lisp_Object *args; | |
7139 | { | |
7140 | int i, j; | |
7141 | int changed[coding_category_max]; | |
7142 | enum coding_category priorities[coding_category_max]; | |
7143 | ||
7144 | bzero (changed, sizeof changed); | |
7145 | ||
7146 | for (i = j = 0; i < nargs; i++) | |
7147 | { | |
7148 | enum coding_category category; | |
7149 | Lisp_Object spec, attrs; | |
7150 | ||
7151 | CHECK_CODING_SYSTEM_GET_SPEC (args[i], spec); | |
7152 | attrs = AREF (spec, 0); | |
7153 | category = XINT (CODING_ATTR_CATEGORY (attrs)); | |
7154 | if (changed[category]) | |
7155 | /* Ignore this coding system because a coding system of the | |
7156 | same category already had a higher priority. */ | |
7157 | continue; | |
7158 | changed[category] = 1; | |
7159 | priorities[j++] = category; | |
7160 | if (coding_categories[category].id >= 0 | |
7161 | && ! EQ (args[i], CODING_ID_NAME (coding_categories[category].id))) | |
7162 | setup_coding_system (args[i], &coding_categories[category]); | |
7163 | } | |
7164 | ||
7165 | /* Now we have decided top J priorities. Reflect the order of the | |
7166 | original priorities to the remaining priorities. */ | |
7167 | ||
7168 | for (i = j, j = 0; i < coding_category_max; i++, j++) | |
7169 | { | |
7170 | while (j < coding_category_max | |
7171 | && changed[coding_priorities[j]]) | |
7172 | j++; | |
7173 | if (j == coding_category_max) | |
7174 | abort (); | |
7175 | priorities[i] = coding_priorities[j]; | |
7176 | } | |
7177 | ||
7178 | bcopy (priorities, coding_priorities, sizeof priorities); | |
7179 | return Qnil; | |
7180 | } | |
7181 | ||
7182 | DEFUN ("coding-system-priority-list", Fcoding_system_priority_list, | |
7183 | Scoding_system_priority_list, 0, 1, 0, | |
7184 | doc: /* Return a list of coding systems ordered by their priorities. */) | |
7185 | (highestp) | |
7186 | Lisp_Object highestp; | |
d46c5b12 KH |
7187 | { |
7188 | int i; | |
df7492f9 | 7189 | Lisp_Object val; |
d46c5b12 | 7190 | |
df7492f9 | 7191 | for (i = 0, val = Qnil; i < coding_category_max; i++) |
d46c5b12 | 7192 | { |
df7492f9 KH |
7193 | enum coding_category category = coding_priorities[i]; |
7194 | int id = coding_categories[category].id; | |
7195 | Lisp_Object attrs; | |
7196 | ||
7197 | if (id < 0) | |
7198 | continue; | |
7199 | attrs = CODING_ID_ATTRS (id); | |
7200 | if (! NILP (highestp)) | |
7201 | return CODING_ATTR_BASE_NAME (attrs); | |
7202 | val = Fcons (CODING_ATTR_BASE_NAME (attrs), val); | |
7203 | } | |
7204 | return Fnreverse (val); | |
7205 | } | |
7206 | ||
7207 | static Lisp_Object | |
7208 | make_subsidiaries (base) | |
7209 | Lisp_Object base; | |
7210 | { | |
7211 | Lisp_Object subsidiaries; | |
7212 | char *suffixes[] = { "-unix", "-dos", "-mac" }; | |
7213 | int base_name_len = STRING_BYTES (XSYMBOL (base)->name); | |
7214 | char *buf = (char *) alloca (base_name_len + 6); | |
7215 | int i; | |
7216 | ||
7217 | bcopy (XSYMBOL (base)->name->data, buf, base_name_len); | |
7218 | subsidiaries = Fmake_vector (make_number (3), Qnil); | |
7219 | for (i = 0; i < 3; i++) | |
7220 | { | |
7221 | bcopy (suffixes[i], buf + base_name_len, strlen (suffixes[i]) + 1); | |
7222 | ASET (subsidiaries, i, intern (buf)); | |
7223 | } | |
7224 | return subsidiaries; | |
7225 | } | |
7226 | ||
7227 | ||
7228 | DEFUN ("define-coding-system-internal", Fdefine_coding_system_internal, | |
7229 | Sdefine_coding_system_internal, coding_arg_max, MANY, 0, | |
1fcd6c8b DL |
7230 | doc: /* For internal use only. |
7231 | usage: (define-coding-system-internal ...) */) | |
df7492f9 KH |
7232 | (nargs, args) |
7233 | int nargs; | |
7234 | Lisp_Object *args; | |
7235 | { | |
7236 | Lisp_Object name; | |
7237 | Lisp_Object spec_vec; /* [ ATTRS ALIASE EOL_TYPE ] */ | |
7238 | Lisp_Object attrs; /* Vector of attributes. */ | |
7239 | Lisp_Object eol_type; | |
7240 | Lisp_Object aliases; | |
7241 | Lisp_Object coding_type, charset_list, safe_charsets; | |
7242 | enum coding_category category; | |
7243 | Lisp_Object tail, val; | |
7244 | int max_charset_id = 0; | |
7245 | int i; | |
7246 | ||
7247 | if (nargs < coding_arg_max) | |
7248 | goto short_args; | |
7249 | ||
7250 | attrs = Fmake_vector (make_number (coding_attr_last_index), Qnil); | |
7251 | ||
7252 | name = args[coding_arg_name]; | |
7253 | CHECK_SYMBOL (name); | |
7254 | CODING_ATTR_BASE_NAME (attrs) = name; | |
7255 | ||
7256 | val = args[coding_arg_mnemonic]; | |
7257 | if (! STRINGP (val)) | |
7258 | CHECK_CHARACTER (val); | |
7259 | CODING_ATTR_MNEMONIC (attrs) = val; | |
7260 | ||
7261 | coding_type = args[coding_arg_coding_type]; | |
7262 | CHECK_SYMBOL (coding_type); | |
7263 | CODING_ATTR_TYPE (attrs) = coding_type; | |
7264 | ||
7265 | charset_list = args[coding_arg_charset_list]; | |
7266 | if (SYMBOLP (charset_list)) | |
7267 | { | |
7268 | if (EQ (charset_list, Qiso_2022)) | |
7269 | { | |
7270 | if (! EQ (coding_type, Qiso_2022)) | |
7271 | error ("Invalid charset-list"); | |
7272 | charset_list = Viso_2022_charset_list; | |
7273 | } | |
7274 | else if (EQ (charset_list, Qemacs_mule)) | |
7275 | { | |
7276 | if (! EQ (coding_type, Qemacs_mule)) | |
7277 | error ("Invalid charset-list"); | |
7278 | charset_list = Vemacs_mule_charset_list; | |
7279 | } | |
7280 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
7281 | if (max_charset_id < XFASTINT (XCAR (tail))) | |
7282 | max_charset_id = XFASTINT (XCAR (tail)); | |
7283 | } | |
7284 | else | |
7285 | { | |
7286 | charset_list = Fcopy_sequence (charset_list); | |
7287 | for (tail = charset_list; !NILP (tail); tail = Fcdr (tail)) | |
7288 | { | |
7289 | struct charset *charset; | |
7290 | ||
7291 | val = Fcar (tail); | |
7292 | CHECK_CHARSET_GET_CHARSET (val, charset); | |
7293 | if (EQ (coding_type, Qiso_2022) | |
7294 | ? CHARSET_ISO_FINAL (charset) < 0 | |
7295 | : EQ (coding_type, Qemacs_mule) | |
7296 | ? CHARSET_EMACS_MULE_ID (charset) < 0 | |
7297 | : 0) | |
7298 | error ("Can't handle charset `%s'", | |
7299 | XSYMBOL (CHARSET_NAME (charset))->name->data); | |
7300 | ||
7301 | XCAR (tail) = make_number (charset->id); | |
7302 | if (max_charset_id < charset->id) | |
7303 | max_charset_id = charset->id; | |
7304 | } | |
7305 | } | |
7306 | CODING_ATTR_CHARSET_LIST (attrs) = charset_list; | |
7307 | ||
7308 | safe_charsets = Fmake_string (make_number (max_charset_id + 1), | |
7309 | make_number (255)); | |
7310 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
7311 | XSTRING (safe_charsets)->data[XFASTINT (XCAR (tail))] = 0; | |
7312 | CODING_ATTR_SAFE_CHARSETS (attrs) = safe_charsets; | |
7313 | ||
7314 | val = args[coding_arg_decode_translation_table]; | |
7315 | if (! NILP (val)) | |
7316 | CHECK_CHAR_TABLE (val); | |
7317 | CODING_ATTR_DECODE_TBL (attrs) = val; | |
7318 | ||
7319 | val = args[coding_arg_encode_translation_table]; | |
7320 | if (! NILP (val)) | |
7321 | CHECK_CHAR_TABLE (val); | |
7322 | CODING_ATTR_ENCODE_TBL (attrs) = val; | |
7323 | ||
7324 | val = args[coding_arg_post_read_conversion]; | |
7325 | CHECK_SYMBOL (val); | |
7326 | CODING_ATTR_POST_READ (attrs) = val; | |
7327 | ||
7328 | val = args[coding_arg_pre_write_conversion]; | |
7329 | CHECK_SYMBOL (val); | |
7330 | CODING_ATTR_PRE_WRITE (attrs) = val; | |
7331 | ||
7332 | val = args[coding_arg_default_char]; | |
7333 | if (NILP (val)) | |
7334 | CODING_ATTR_DEFAULT_CHAR (attrs) = make_number (' '); | |
7335 | else | |
7336 | { | |
7337 | CHECK_CHARACTER (val); | |
7338 | CODING_ATTR_DEFAULT_CHAR (attrs) = val; | |
7339 | } | |
7340 | ||
7341 | val = args[coding_arg_plist]; | |
7342 | CHECK_LIST (val); | |
7343 | CODING_ATTR_PLIST (attrs) = val; | |
7344 | ||
7345 | if (EQ (coding_type, Qcharset)) | |
7346 | { | |
7347 | val = Fmake_vector (make_number (256), Qnil); | |
7348 | ||
7349 | for (tail = charset_list; CONSP (tail); tail = XCDR (tail)) | |
7350 | { | |
7351 | struct charset *charset = CHARSET_FROM_ID (XINT (XCAR (tail))); | |
15d143f7 | 7352 | int idx = (CHARSET_DIMENSION (charset) - 1) * 4; |
df7492f9 | 7353 | |
15d143f7 KH |
7354 | for (i = charset->code_space[idx]; |
7355 | i <= charset->code_space[idx + 1]; i++) | |
7356 | { | |
7357 | if (NILP (AREF (val, i))) | |
7358 | ASET (val, i, XCAR (tail)); | |
7359 | else | |
7360 | error ("Charsets conflicts in the first byte"); | |
7361 | } | |
df7492f9 KH |
7362 | } |
7363 | ASET (attrs, coding_attr_charset_valids, val); | |
7364 | category = coding_category_charset; | |
7365 | } | |
7366 | else if (EQ (coding_type, Qccl)) | |
7367 | { | |
7368 | Lisp_Object valids; | |
7369 | ||
7370 | if (nargs < coding_arg_ccl_max) | |
7371 | goto short_args; | |
7372 | ||
7373 | val = args[coding_arg_ccl_decoder]; | |
7374 | CHECK_CCL_PROGRAM (val); | |
7375 | if (VECTORP (val)) | |
7376 | val = Fcopy_sequence (val); | |
7377 | ASET (attrs, coding_attr_ccl_decoder, val); | |
7378 | ||
7379 | val = args[coding_arg_ccl_encoder]; | |
7380 | CHECK_CCL_PROGRAM (val); | |
7381 | if (VECTORP (val)) | |
7382 | val = Fcopy_sequence (val); | |
7383 | ASET (attrs, coding_attr_ccl_encoder, val); | |
7384 | ||
7385 | val = args[coding_arg_ccl_valids]; | |
7386 | valids = Fmake_string (make_number (256), make_number (0)); | |
7387 | for (tail = val; !NILP (tail); tail = Fcdr (tail)) | |
7388 | { | |
7389 | val = Fcar (tail); | |
7390 | if (INTEGERP (val)) | |
7391 | ASET (valids, XINT (val), 1); | |
7392 | else | |
7393 | { | |
7394 | int from, to; | |
7395 | ||
7396 | CHECK_CONS (val); | |
7397 | CHECK_NUMBER (XCAR (val)); | |
7398 | CHECK_NUMBER (XCDR (val)); | |
7399 | from = XINT (XCAR (val)); | |
7400 | to = XINT (XCDR (val)); | |
7401 | for (i = from; i <= to; i++) | |
7402 | ASET (valids, i, 1); | |
7403 | } | |
7404 | } | |
7405 | ASET (attrs, coding_attr_ccl_valids, valids); | |
7406 | ||
7407 | category = coding_category_ccl; | |
7408 | } | |
7409 | else if (EQ (coding_type, Qutf_16)) | |
7410 | { | |
7411 | Lisp_Object bom, endian; | |
7412 | ||
7413 | if (nargs < coding_arg_utf16_max) | |
7414 | goto short_args; | |
7415 | ||
7416 | bom = args[coding_arg_utf16_bom]; | |
7417 | if (! NILP (bom) && ! EQ (bom, Qt)) | |
7418 | { | |
7419 | CHECK_CONS (bom); | |
7420 | CHECK_CODING_SYSTEM (XCAR (bom)); | |
7421 | CHECK_CODING_SYSTEM (XCDR (bom)); | |
7422 | } | |
7423 | ASET (attrs, coding_attr_utf_16_bom, bom); | |
7424 | ||
7425 | endian = args[coding_arg_utf16_endian]; | |
7426 | ASET (attrs, coding_attr_utf_16_endian, endian); | |
7427 | ||
7428 | category = (CONSP (bom) | |
7429 | ? coding_category_utf_16_auto | |
7430 | : NILP (bom) | |
7431 | ? (NILP (endian) | |
7432 | ? coding_category_utf_16_be_nosig | |
7433 | : coding_category_utf_16_le_nosig) | |
7434 | : (NILP (endian) | |
7435 | ? coding_category_utf_16_be | |
7436 | : coding_category_utf_16_le)); | |
7437 | } | |
7438 | else if (EQ (coding_type, Qiso_2022)) | |
7439 | { | |
7440 | Lisp_Object initial, reg_usage, request, flags; | |
0be8721c | 7441 | int i, id; |
1397dc18 | 7442 | |
df7492f9 KH |
7443 | if (nargs < coding_arg_iso2022_max) |
7444 | goto short_args; | |
7445 | ||
7446 | initial = Fcopy_sequence (args[coding_arg_iso2022_initial]); | |
7447 | CHECK_VECTOR (initial); | |
7448 | for (i = 0; i < 4; i++) | |
7449 | { | |
7450 | val = Faref (initial, make_number (i)); | |
7451 | if (! NILP (val)) | |
7452 | { | |
7453 | CHECK_CHARSET_GET_ID (val, id); | |
7454 | ASET (initial, i, make_number (id)); | |
7455 | } | |
7456 | else | |
7457 | ASET (initial, i, make_number (-1)); | |
7458 | } | |
7459 | ||
7460 | reg_usage = args[coding_arg_iso2022_reg_usage]; | |
7461 | CHECK_CONS (reg_usage); | |
7462 | CHECK_NATNUM (XCAR (reg_usage)); | |
7463 | CHECK_NATNUM (XCDR (reg_usage)); | |
7464 | ||
7465 | request = Fcopy_sequence (args[coding_arg_iso2022_request]); | |
7466 | for (tail = request; ! NILP (tail); tail = Fcdr (tail)) | |
1397dc18 | 7467 | { |
df7492f9 KH |
7468 | int id; |
7469 | ||
7470 | val = Fcar (tail); | |
7471 | CHECK_CONS (val); | |
7472 | CHECK_CHARSET_GET_ID (XCAR (val), id); | |
7473 | CHECK_NATNUM (XCDR (val)); | |
7474 | if (XINT (XCDR (val)) >= 4) | |
7475 | error ("Invalid graphic register number: %d", XINT (XCDR (val))); | |
7476 | XCAR (val) = make_number (id); | |
1397dc18 | 7477 | } |
df7492f9 KH |
7478 | |
7479 | flags = args[coding_arg_iso2022_flags]; | |
7480 | CHECK_NATNUM (flags); | |
7481 | i = XINT (flags); | |
7482 | if (EQ (args[coding_arg_charset_list], Qiso_2022)) | |
7483 | flags = make_number (i | CODING_ISO_FLAG_FULL_SUPPORT); | |
7484 | ||
7485 | ASET (attrs, coding_attr_iso_initial, initial); | |
7486 | ASET (attrs, coding_attr_iso_usage, reg_usage); | |
7487 | ASET (attrs, coding_attr_iso_request, request); | |
7488 | ASET (attrs, coding_attr_iso_flags, flags); | |
7489 | setup_iso_safe_charsets (attrs); | |
7490 | ||
7491 | if (i & CODING_ISO_FLAG_SEVEN_BITS) | |
7492 | category = ((i & (CODING_ISO_FLAG_LOCKING_SHIFT | |
7493 | | CODING_ISO_FLAG_SINGLE_SHIFT)) | |
7494 | ? coding_category_iso_7_else | |
7495 | : EQ (args[coding_arg_charset_list], Qiso_2022) | |
7496 | ? coding_category_iso_7 | |
7497 | : coding_category_iso_7_tight); | |
7498 | else | |
7499 | { | |
7500 | int id = XINT (AREF (initial, 1)); | |
7501 | ||
7502 | category = (((i & (CODING_ISO_FLAG_LOCKING_SHIFT | |
7503 | | CODING_ISO_FLAG_SINGLE_SHIFT)) | |
7504 | || EQ (args[coding_arg_charset_list], Qiso_2022) | |
7505 | || id < 0) | |
7506 | ? coding_category_iso_8_else | |
7507 | : (CHARSET_DIMENSION (CHARSET_FROM_ID (id)) == 1) | |
7508 | ? coding_category_iso_8_1 | |
7509 | : coding_category_iso_8_2); | |
7510 | } | |
7511 | } | |
7512 | else if (EQ (coding_type, Qemacs_mule)) | |
7513 | { | |
7514 | if (EQ (args[coding_arg_charset_list], Qemacs_mule)) | |
7515 | ASET (attrs, coding_attr_emacs_mule_full, Qt); | |
7516 | ||
7517 | category = coding_category_emacs_mule; | |
7518 | } | |
7519 | else if (EQ (coding_type, Qshift_jis)) | |
7520 | { | |
7521 | ||
7522 | struct charset *charset; | |
7523 | ||
7524 | if (XINT (Flength (charset_list)) != 3) | |
7525 | error ("There should be just three charsets"); | |
7526 | ||
7527 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
7528 | if (CHARSET_DIMENSION (charset) != 1) | |
7529 | error ("Dimension of charset %s is not one", | |
7530 | XSYMBOL (CHARSET_NAME (charset))->name->data); | |
7531 | ||
7532 | charset_list = XCDR (charset_list); | |
7533 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
7534 | if (CHARSET_DIMENSION (charset) != 1) | |
7535 | error ("Dimension of charset %s is not one", | |
7536 | XSYMBOL (CHARSET_NAME (charset))->name->data); | |
7537 | ||
7538 | charset_list = XCDR (charset_list); | |
7539 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
7540 | if (CHARSET_DIMENSION (charset) != 2) | |
7541 | error ("Dimension of charset %s is not two", | |
7542 | XSYMBOL (CHARSET_NAME (charset))->name->data); | |
7543 | ||
7544 | category = coding_category_sjis; | |
7545 | Vsjis_coding_system = name; | |
7546 | } | |
7547 | else if (EQ (coding_type, Qbig5)) | |
7548 | { | |
7549 | struct charset *charset; | |
7550 | ||
7551 | if (XINT (Flength (charset_list)) != 2) | |
7552 | error ("There should be just two charsets"); | |
7553 | ||
7554 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
7555 | if (CHARSET_DIMENSION (charset) != 1) | |
7556 | error ("Dimension of charset %s is not one", | |
7557 | XSYMBOL (CHARSET_NAME (charset))->name->data); | |
7558 | ||
7559 | charset_list = XCDR (charset_list); | |
7560 | charset = CHARSET_FROM_ID (XINT (XCAR (charset_list))); | |
7561 | if (CHARSET_DIMENSION (charset) != 2) | |
7562 | error ("Dimension of charset %s is not two", | |
7563 | XSYMBOL (CHARSET_NAME (charset))->name->data); | |
7564 | ||
7565 | category = coding_category_big5; | |
7566 | Vbig5_coding_system = name; | |
7567 | } | |
7568 | else if (EQ (coding_type, Qraw_text)) | |
7569 | category = coding_category_raw_text; | |
7570 | else if (EQ (coding_type, Qutf_8)) | |
7571 | category = coding_category_utf_8; | |
7572 | else if (EQ (coding_type, Qundecided)) | |
7573 | category = coding_category_undecided; | |
7574 | else | |
7575 | error ("Invalid coding system type: %s", | |
7576 | XSYMBOL (coding_type)->name->data); | |
7577 | ||
7578 | CODING_ATTR_CATEGORY (attrs) = make_number (category); | |
7579 | ||
7580 | eol_type = args[coding_arg_eol_type]; | |
7581 | if (! NILP (eol_type) | |
7582 | && ! EQ (eol_type, Qunix) | |
7583 | && ! EQ (eol_type, Qdos) | |
7584 | && ! EQ (eol_type, Qmac)) | |
7585 | error ("Invalid eol-type"); | |
7586 | ||
7587 | aliases = Fcons (name, Qnil); | |
7588 | ||
7589 | if (NILP (eol_type)) | |
7590 | { | |
7591 | eol_type = make_subsidiaries (name); | |
7592 | for (i = 0; i < 3; i++) | |
1397dc18 | 7593 | { |
df7492f9 KH |
7594 | Lisp_Object this_spec, this_name, this_aliases, this_eol_type; |
7595 | ||
7596 | this_name = AREF (eol_type, i); | |
7597 | this_aliases = Fcons (this_name, Qnil); | |
7598 | this_eol_type = (i == 0 ? Qunix : i == 1 ? Qdos : Qmac); | |
7599 | this_spec = Fmake_vector (make_number (3), attrs); | |
7600 | ASET (this_spec, 1, this_aliases); | |
7601 | ASET (this_spec, 2, this_eol_type); | |
7602 | Fputhash (this_name, this_spec, Vcoding_system_hash_table); | |
7603 | Vcoding_system_list = Fcons (this_name, Vcoding_system_list); | |
7604 | Vcoding_system_alist = Fcons (Fcons (Fsymbol_name (this_name), Qnil), | |
7605 | Vcoding_system_alist); | |
1397dc18 | 7606 | } |
d46c5b12 | 7607 | } |
1397dc18 | 7608 | |
df7492f9 KH |
7609 | spec_vec = Fmake_vector (make_number (3), attrs); |
7610 | ASET (spec_vec, 1, aliases); | |
7611 | ASET (spec_vec, 2, eol_type); | |
7612 | ||
7613 | Fputhash (name, spec_vec, Vcoding_system_hash_table); | |
7614 | Vcoding_system_list = Fcons (name, Vcoding_system_list); | |
7615 | Vcoding_system_alist = Fcons (Fcons (Fsymbol_name (name), Qnil), | |
7616 | Vcoding_system_alist); | |
7617 | ||
7618 | { | |
7619 | int id = coding_categories[category].id; | |
7620 | ||
7621 | if (id < 0 || EQ (name, CODING_ID_NAME (id))) | |
7622 | setup_coding_system (name, &coding_categories[category]); | |
7623 | } | |
7624 | ||
d46c5b12 | 7625 | return Qnil; |
df7492f9 KH |
7626 | |
7627 | short_args: | |
7628 | return Fsignal (Qwrong_number_of_arguments, | |
7629 | Fcons (intern ("define-coding-system-internal"), | |
7630 | make_number (nargs))); | |
d46c5b12 KH |
7631 | } |
7632 | ||
df7492f9 KH |
7633 | DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, |
7634 | Sdefine_coding_system_alias, 2, 2, 0, | |
7635 | doc: /* Define ALIAS as an alias for CODING-SYSTEM. */) | |
7636 | (alias, coding_system) | |
7637 | Lisp_Object alias, coding_system; | |
66cfb530 | 7638 | { |
df7492f9 | 7639 | Lisp_Object spec, aliases, eol_type; |
84d60297 | 7640 | |
df7492f9 KH |
7641 | CHECK_SYMBOL (alias); |
7642 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
7643 | aliases = AREF (spec, 1); | |
7644 | while (!NILP (XCDR (aliases))) | |
7645 | aliases = XCDR (aliases); | |
7646 | XCDR (aliases) = Fcons (alias, Qnil); | |
66cfb530 | 7647 | |
df7492f9 KH |
7648 | eol_type = AREF (spec, 2); |
7649 | if (VECTORP (eol_type)) | |
66cfb530 | 7650 | { |
df7492f9 KH |
7651 | Lisp_Object subsidiaries; |
7652 | int i; | |
7653 | ||
7654 | subsidiaries = make_subsidiaries (alias); | |
7655 | for (i = 0; i < 3; i++) | |
7656 | Fdefine_coding_system_alias (AREF (subsidiaries, i), | |
7657 | AREF (eol_type, i)); | |
7658 | ||
7659 | ASET (spec, 2, subsidiaries); | |
66cfb530 | 7660 | } |
df7492f9 KH |
7661 | |
7662 | Fputhash (alias, spec, Vcoding_system_hash_table); | |
5bad0796 DL |
7663 | Vcoding_system_alist = Fcons (Fcons (Fsymbol_name (alias), Qnil), |
7664 | Vcoding_system_alist); | |
66cfb530 KH |
7665 | |
7666 | return Qnil; | |
7667 | } | |
7668 | ||
df7492f9 KH |
7669 | DEFUN ("coding-system-base", Fcoding_system_base, Scoding_system_base, |
7670 | 1, 1, 0, | |
7671 | doc: /* Return the base of CODING-SYSTEM. | |
7672 | Any alias or subsidiary coding systems are not base coding system. */) | |
7673 | (coding_system) | |
7674 | Lisp_Object coding_system; | |
7675 | { | |
7676 | Lisp_Object spec, attrs; | |
7677 | ||
7678 | if (NILP (coding_system)) | |
7679 | return (Qno_conversion); | |
7680 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
7681 | attrs = AREF (spec, 0); | |
7682 | return CODING_ATTR_BASE_NAME (attrs); | |
7683 | } | |
7684 | ||
7685 | DEFUN ("coding-system-plist", Fcoding_system_plist, Scoding_system_plist, | |
7686 | 1, 1, 0, | |
7687 | doc: "Return the property list of CODING-SYSTEM.") | |
7688 | (coding_system) | |
7689 | Lisp_Object coding_system; | |
7690 | { | |
7691 | Lisp_Object spec, attrs; | |
7692 | ||
7693 | if (NILP (coding_system)) | |
7694 | coding_system = Qno_conversion; | |
7695 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
7696 | attrs = AREF (spec, 0); | |
7697 | return CODING_ATTR_PLIST (attrs); | |
7698 | } | |
7699 | ||
7700 | ||
7701 | DEFUN ("coding-system-aliases", Fcoding_system_aliases, Scoding_system_aliases, | |
7702 | 1, 1, 0, | |
7703 | doc: /* Return the list of aliases of CODING-SYSTEM. | |
7704 | A base coding system is what made by `define-coding-system'. | |
7705 | Any alias nor subsidiary coding systems are not base coding system. */) | |
7706 | (coding_system) | |
7707 | Lisp_Object coding_system; | |
7708 | { | |
7709 | Lisp_Object spec; | |
7710 | ||
7711 | if (NILP (coding_system)) | |
7712 | coding_system = Qno_conversion; | |
7713 | CHECK_CODING_SYSTEM_GET_SPEC (coding_system, spec); | |
7714 | return AREF (spec, 2); | |
7715 | } | |
7716 | ||
7717 | DEFUN ("coding-system-eol-type", Fcoding_system_eol_type, | |
7718 | Scoding_system_eol_type, 1, 1, 0, | |
7719 | doc: /* Return eol-type of CODING-SYSTEM. | |
7720 | An eol-type is integer 0, 1, 2, or a vector of coding systems. | |
7721 | ||
7722 | Integer values 0, 1, and 2 indicate a format of end-of-line; LF, CRLF, | |
7723 | and CR respectively. | |
7724 | ||
7725 | A vector value indicates that a format of end-of-line should be | |
7726 | detected automatically. Nth element of the vector is the subsidiary | |
7727 | coding system whose eol-type is N. */) | |
7728 | (coding_system) | |
7729 | Lisp_Object coding_system; | |
7730 | { | |
7731 | Lisp_Object spec, eol_type; | |
7732 | int n; | |
7733 | ||
7734 | if (NILP (coding_system)) | |
7735 | coding_system = Qno_conversion; | |
7736 | if (! CODING_SYSTEM_P (coding_system)) | |
7737 | return Qnil; | |
7738 | spec = CODING_SYSTEM_SPEC (coding_system); | |
7739 | eol_type = AREF (spec, 2); | |
7740 | if (VECTORP (eol_type)) | |
7741 | return Fcopy_sequence (eol_type); | |
7742 | n = EQ (eol_type, Qunix) ? 0 : EQ (eol_type, Qdos) ? 1 : 2; | |
7743 | return make_number (n); | |
7744 | } | |
7745 | ||
4ed46869 KH |
7746 | #endif /* emacs */ |
7747 | ||
7748 | \f | |
1397dc18 | 7749 | /*** 9. Post-amble ***/ |
4ed46869 | 7750 | |
dfcf069d | 7751 | void |
4ed46869 KH |
7752 | init_coding_once () |
7753 | { | |
7754 | int i; | |
7755 | ||
df7492f9 KH |
7756 | for (i = 0; i < coding_category_max; i++) |
7757 | { | |
7758 | coding_categories[i].id = -1; | |
7759 | coding_priorities[i] = i; | |
7760 | } | |
4ed46869 KH |
7761 | |
7762 | /* ISO2022 specific initialize routine. */ | |
7763 | for (i = 0; i < 0x20; i++) | |
b73bfc1c | 7764 | iso_code_class[i] = ISO_control_0; |
4ed46869 KH |
7765 | for (i = 0x21; i < 0x7F; i++) |
7766 | iso_code_class[i] = ISO_graphic_plane_0; | |
7767 | for (i = 0x80; i < 0xA0; i++) | |
b73bfc1c | 7768 | iso_code_class[i] = ISO_control_1; |
4ed46869 KH |
7769 | for (i = 0xA1; i < 0xFF; i++) |
7770 | iso_code_class[i] = ISO_graphic_plane_1; | |
7771 | iso_code_class[0x20] = iso_code_class[0x7F] = ISO_0x20_or_0x7F; | |
7772 | iso_code_class[0xA0] = iso_code_class[0xFF] = ISO_0xA0_or_0xFF; | |
7773 | iso_code_class[ISO_CODE_CR] = ISO_carriage_return; | |
7774 | iso_code_class[ISO_CODE_SO] = ISO_shift_out; | |
7775 | iso_code_class[ISO_CODE_SI] = ISO_shift_in; | |
7776 | iso_code_class[ISO_CODE_SS2_7] = ISO_single_shift_2_7; | |
7777 | iso_code_class[ISO_CODE_ESC] = ISO_escape; | |
7778 | iso_code_class[ISO_CODE_SS2] = ISO_single_shift_2; | |
7779 | iso_code_class[ISO_CODE_SS3] = ISO_single_shift_3; | |
7780 | iso_code_class[ISO_CODE_CSI] = ISO_control_sequence_introducer; | |
7781 | ||
b843d1ae | 7782 | inhibit_pre_post_conversion = 0; |
df7492f9 KH |
7783 | |
7784 | for (i = 0; i < 256; i++) | |
7785 | { | |
7786 | emacs_mule_bytes[i] = 1; | |
7787 | } | |
e0e989f6 KH |
7788 | } |
7789 | ||
7790 | #ifdef emacs | |
7791 | ||
dfcf069d | 7792 | void |
e0e989f6 KH |
7793 | syms_of_coding () |
7794 | { | |
df7492f9 KH |
7795 | staticpro (&Vcoding_system_hash_table); |
7796 | Vcoding_system_hash_table = Fmakehash (Qeq); | |
7797 | ||
7798 | staticpro (&Vsjis_coding_system); | |
7799 | Vsjis_coding_system = Qnil; | |
7800 | ||
7801 | staticpro (&Vbig5_coding_system); | |
7802 | Vbig5_coding_system = Qnil; | |
7803 | ||
7804 | staticpro (&Vcode_conversion_work_buf_list); | |
7805 | Vcode_conversion_work_buf_list = Qnil; | |
e0e989f6 | 7806 | |
df7492f9 KH |
7807 | staticpro (&Vcode_conversion_reused_work_buf); |
7808 | Vcode_conversion_reused_work_buf = Qnil; | |
7809 | ||
7810 | DEFSYM (Qcharset, "charset"); | |
7811 | DEFSYM (Qtarget_idx, "target-idx"); | |
7812 | DEFSYM (Qcoding_system_history, "coding-system-history"); | |
bb0115a2 RS |
7813 | Fset (Qcoding_system_history, Qnil); |
7814 | ||
9ce27fde | 7815 | /* Target FILENAME is the first argument. */ |
e0e989f6 | 7816 | Fput (Qinsert_file_contents, Qtarget_idx, make_number (0)); |
9ce27fde | 7817 | /* Target FILENAME is the third argument. */ |
e0e989f6 KH |
7818 | Fput (Qwrite_region, Qtarget_idx, make_number (2)); |
7819 | ||
df7492f9 | 7820 | DEFSYM (Qcall_process, "call-process"); |
9ce27fde | 7821 | /* Target PROGRAM is the first argument. */ |
e0e989f6 KH |
7822 | Fput (Qcall_process, Qtarget_idx, make_number (0)); |
7823 | ||
df7492f9 | 7824 | DEFSYM (Qcall_process_region, "call-process-region"); |
9ce27fde | 7825 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
7826 | Fput (Qcall_process_region, Qtarget_idx, make_number (2)); |
7827 | ||
df7492f9 | 7828 | DEFSYM (Qstart_process, "start-process"); |
9ce27fde | 7829 | /* Target PROGRAM is the third argument. */ |
e0e989f6 KH |
7830 | Fput (Qstart_process, Qtarget_idx, make_number (2)); |
7831 | ||
df7492f9 | 7832 | DEFSYM (Qopen_network_stream, "open-network-stream"); |
9ce27fde | 7833 | /* Target SERVICE is the fourth argument. */ |
e0e989f6 KH |
7834 | Fput (Qopen_network_stream, Qtarget_idx, make_number (3)); |
7835 | ||
df7492f9 KH |
7836 | DEFSYM (Qcoding_system, "coding-system"); |
7837 | DEFSYM (Qcoding_aliases, "coding-aliases"); | |
4ed46869 | 7838 | |
df7492f9 KH |
7839 | DEFSYM (Qeol_type, "eol-type"); |
7840 | DEFSYM (Qunix, "unix"); | |
7841 | DEFSYM (Qdos, "dos"); | |
7842 | DEFSYM (Qmac, "mac"); | |
4ed46869 | 7843 | |
df7492f9 KH |
7844 | DEFSYM (Qbuffer_file_coding_system, "buffer-file-coding-system"); |
7845 | DEFSYM (Qpost_read_conversion, "post-read-conversion"); | |
7846 | DEFSYM (Qpre_write_conversion, "pre-write-conversion"); | |
7847 | DEFSYM (Qdefault_char, "default-char"); | |
7848 | DEFSYM (Qundecided, "undecided"); | |
7849 | DEFSYM (Qno_conversion, "no-conversion"); | |
7850 | DEFSYM (Qraw_text, "raw-text"); | |
4ed46869 | 7851 | |
df7492f9 | 7852 | DEFSYM (Qiso_2022, "iso-2022"); |
4ed46869 | 7853 | |
df7492f9 | 7854 | DEFSYM (Qutf_8, "utf-8"); |
27901516 | 7855 | |
df7492f9 KH |
7856 | DEFSYM (Qutf_16, "utf-16"); |
7857 | DEFSYM (Qutf_16_be, "utf-16-be"); | |
7858 | DEFSYM (Qutf_16_be_nosig, "utf-16-be-nosig"); | |
7859 | DEFSYM (Qutf_16_le, "utf-16-l3"); | |
7860 | DEFSYM (Qutf_16_le_nosig, "utf-16-le-nosig"); | |
7861 | DEFSYM (Qsignature, "signature"); | |
7862 | DEFSYM (Qendian, "endian"); | |
7863 | DEFSYM (Qbig, "big"); | |
7864 | DEFSYM (Qlittle, "little"); | |
27901516 | 7865 | |
df7492f9 KH |
7866 | DEFSYM (Qshift_jis, "shift-jis"); |
7867 | DEFSYM (Qbig5, "big5"); | |
4ed46869 | 7868 | |
df7492f9 | 7869 | DEFSYM (Qcoding_system_p, "coding-system-p"); |
4ed46869 | 7870 | |
df7492f9 | 7871 | DEFSYM (Qcoding_system_error, "coding-system-error"); |
4ed46869 KH |
7872 | Fput (Qcoding_system_error, Qerror_conditions, |
7873 | Fcons (Qcoding_system_error, Fcons (Qerror, Qnil))); | |
7874 | Fput (Qcoding_system_error, Qerror_message, | |
9ce27fde | 7875 | build_string ("Invalid coding system")); |
4ed46869 | 7876 | |
df7492f9 KH |
7877 | /* Intern this now in case it isn't already done. |
7878 | Setting this variable twice is harmless. | |
7879 | But don't staticpro it here--that is done in alloc.c. */ | |
7880 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
4ed46869 | 7881 | |
df7492f9 | 7882 | DEFSYM (Qtranslation_table, "translation-table"); |
1397dc18 | 7883 | Fput (Qtranslation_table, Qchar_table_extra_slots, make_number (1)); |
df7492f9 KH |
7884 | DEFSYM (Qtranslation_table_id, "translation-table-id"); |
7885 | DEFSYM (Qtranslation_table_for_decode, "translation-table-for-decode"); | |
7886 | DEFSYM (Qtranslation_table_for_encode, "translation-table-for-encode"); | |
bdd9fb48 | 7887 | |
df7492f9 | 7888 | DEFSYM (Qvalid_codes, "valid-codes"); |
05e6f5dc | 7889 | |
df7492f9 | 7890 | DEFSYM (Qemacs_mule, "emacs-mule"); |
05e6f5dc | 7891 | |
df7492f9 KH |
7892 | Vcoding_category_table |
7893 | = Fmake_vector (make_number (coding_category_max), Qnil); | |
7894 | staticpro (&Vcoding_category_table); | |
7895 | /* Followings are target of code detection. */ | |
7896 | ASET (Vcoding_category_table, coding_category_iso_7, | |
7897 | intern ("coding-category-iso-7")); | |
7898 | ASET (Vcoding_category_table, coding_category_iso_7_tight, | |
7899 | intern ("coding-category-iso-7-tight")); | |
7900 | ASET (Vcoding_category_table, coding_category_iso_8_1, | |
7901 | intern ("coding-category-iso-8-1")); | |
7902 | ASET (Vcoding_category_table, coding_category_iso_8_2, | |
7903 | intern ("coding-category-iso-8-2")); | |
7904 | ASET (Vcoding_category_table, coding_category_iso_7_else, | |
7905 | intern ("coding-category-iso-7-else")); | |
7906 | ASET (Vcoding_category_table, coding_category_iso_8_else, | |
7907 | intern ("coding-category-iso-8-else")); | |
7908 | ASET (Vcoding_category_table, coding_category_utf_8, | |
7909 | intern ("coding-category-utf-8")); | |
7910 | ASET (Vcoding_category_table, coding_category_utf_16_be, | |
7911 | intern ("coding-category-utf-16-be")); | |
7912 | ASET (Vcoding_category_table, coding_category_utf_16_le, | |
7913 | intern ("coding-category-utf-16-le")); | |
7914 | ASET (Vcoding_category_table, coding_category_utf_16_be_nosig, | |
7915 | intern ("coding-category-utf-16-be-nosig")); | |
7916 | ASET (Vcoding_category_table, coding_category_utf_16_le_nosig, | |
7917 | intern ("coding-category-utf-16-le-nosig")); | |
7918 | ASET (Vcoding_category_table, coding_category_charset, | |
7919 | intern ("coding-category-charset")); | |
7920 | ASET (Vcoding_category_table, coding_category_sjis, | |
7921 | intern ("coding-category-sjis")); | |
7922 | ASET (Vcoding_category_table, coding_category_big5, | |
7923 | intern ("coding-category-big5")); | |
7924 | ASET (Vcoding_category_table, coding_category_ccl, | |
7925 | intern ("coding-category-ccl")); | |
7926 | ASET (Vcoding_category_table, coding_category_emacs_mule, | |
7927 | intern ("coding-category-emacs-mule")); | |
7928 | /* Followings are NOT target of code detection. */ | |
7929 | ASET (Vcoding_category_table, coding_category_raw_text, | |
7930 | intern ("coding-category-raw-text")); | |
7931 | ASET (Vcoding_category_table, coding_category_undecided, | |
7932 | intern ("coding-category-undecided")); | |
70c22245 | 7933 | |
4ed46869 KH |
7934 | defsubr (&Scoding_system_p); |
7935 | defsubr (&Sread_coding_system); | |
7936 | defsubr (&Sread_non_nil_coding_system); | |
7937 | defsubr (&Scheck_coding_system); | |
7938 | defsubr (&Sdetect_coding_region); | |
d46c5b12 | 7939 | defsubr (&Sdetect_coding_string); |
05e6f5dc | 7940 | defsubr (&Sfind_coding_systems_region_internal); |
df7492f9 | 7941 | defsubr (&Scheck_coding_systems_region); |
4ed46869 KH |
7942 | defsubr (&Sdecode_coding_region); |
7943 | defsubr (&Sencode_coding_region); | |
7944 | defsubr (&Sdecode_coding_string); | |
7945 | defsubr (&Sencode_coding_string); | |
7946 | defsubr (&Sdecode_sjis_char); | |
7947 | defsubr (&Sencode_sjis_char); | |
7948 | defsubr (&Sdecode_big5_char); | |
7949 | defsubr (&Sencode_big5_char); | |
1ba9e4ab | 7950 | defsubr (&Sset_terminal_coding_system_internal); |
c4825358 | 7951 | defsubr (&Sset_safe_terminal_coding_system_internal); |
4ed46869 | 7952 | defsubr (&Sterminal_coding_system); |
1ba9e4ab | 7953 | defsubr (&Sset_keyboard_coding_system_internal); |
4ed46869 | 7954 | defsubr (&Skeyboard_coding_system); |
a5d301df | 7955 | defsubr (&Sfind_operation_coding_system); |
df7492f9 KH |
7956 | defsubr (&Sset_coding_system_priority); |
7957 | defsubr (&Sdefine_coding_system_internal); | |
7958 | defsubr (&Sdefine_coding_system_alias); | |
7959 | defsubr (&Scoding_system_base); | |
7960 | defsubr (&Scoding_system_plist); | |
7961 | defsubr (&Scoding_system_aliases); | |
7962 | defsubr (&Scoding_system_eol_type); | |
7963 | defsubr (&Scoding_system_priority_list); | |
4ed46869 | 7964 | |
4608c386 | 7965 | DEFVAR_LISP ("coding-system-list", &Vcoding_system_list, |
48b0f3ae PJ |
7966 | doc: /* List of coding systems. |
7967 | ||
7968 | Do not alter the value of this variable manually. This variable should be | |
df7492f9 | 7969 | updated by the functions `define-coding-system' and |
48b0f3ae | 7970 | `define-coding-system-alias'. */); |
4608c386 KH |
7971 | Vcoding_system_list = Qnil; |
7972 | ||
7973 | DEFVAR_LISP ("coding-system-alist", &Vcoding_system_alist, | |
48b0f3ae PJ |
7974 | doc: /* Alist of coding system names. |
7975 | Each element is one element list of coding system name. | |
7976 | This variable is given to `completing-read' as TABLE argument. | |
7977 | ||
7978 | Do not alter the value of this variable manually. This variable should be | |
7979 | updated by the functions `make-coding-system' and | |
7980 | `define-coding-system-alias'. */); | |
4608c386 KH |
7981 | Vcoding_system_alist = Qnil; |
7982 | ||
4ed46869 | 7983 | DEFVAR_LISP ("coding-category-list", &Vcoding_category_list, |
48b0f3ae PJ |
7984 | doc: /* List of coding-categories (symbols) ordered by priority. |
7985 | ||
7986 | On detecting a coding system, Emacs tries code detection algorithms | |
7987 | associated with each coding-category one by one in this order. When | |
7988 | one algorithm agrees with a byte sequence of source text, the coding | |
7989 | system bound to the corresponding coding-category is selected. */); | |
4ed46869 KH |
7990 | { |
7991 | int i; | |
7992 | ||
7993 | Vcoding_category_list = Qnil; | |
df7492f9 | 7994 | for (i = coding_category_max - 1; i >= 0; i--) |
4ed46869 | 7995 | Vcoding_category_list |
d46c5b12 KH |
7996 | = Fcons (XVECTOR (Vcoding_category_table)->contents[i], |
7997 | Vcoding_category_list); | |
4ed46869 KH |
7998 | } |
7999 | ||
8000 | DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read, | |
48b0f3ae PJ |
8001 | doc: /* Specify the coding system for read operations. |
8002 | It is useful to bind this variable with `let', but do not set it globally. | |
8003 | If the value is a coding system, it is used for decoding on read operation. | |
8004 | If not, an appropriate element is used from one of the coding system alists: | |
8005 | There are three such tables, `file-coding-system-alist', | |
8006 | `process-coding-system-alist', and `network-coding-system-alist'. */); | |
4ed46869 KH |
8007 | Vcoding_system_for_read = Qnil; |
8008 | ||
8009 | DEFVAR_LISP ("coding-system-for-write", &Vcoding_system_for_write, | |
48b0f3ae PJ |
8010 | doc: /* Specify the coding system for write operations. |
8011 | Programs bind this variable with `let', but you should not set it globally. | |
8012 | If the value is a coding system, it is used for encoding of output, | |
8013 | when writing it to a file and when sending it to a file or subprocess. | |
8014 | ||
8015 | If this does not specify a coding system, an appropriate element | |
8016 | is used from one of the coding system alists: | |
8017 | There are three such tables, `file-coding-system-alist', | |
8018 | `process-coding-system-alist', and `network-coding-system-alist'. | |
8019 | For output to files, if the above procedure does not specify a coding system, | |
8020 | the value of `buffer-file-coding-system' is used. */); | |
4ed46869 KH |
8021 | Vcoding_system_for_write = Qnil; |
8022 | ||
8023 | DEFVAR_LISP ("last-coding-system-used", &Vlast_coding_system_used, | |
df7492f9 KH |
8024 | doc: /* |
8025 | Coding system used in the latest file or process I/O. */); | |
4ed46869 KH |
8026 | Vlast_coding_system_used = Qnil; |
8027 | ||
9ce27fde | 8028 | DEFVAR_BOOL ("inhibit-eol-conversion", &inhibit_eol_conversion, |
df7492f9 KH |
8029 | doc: /* |
8030 | *Non-nil means always inhibit code conversion of end-of-line format. | |
48b0f3ae PJ |
8031 | See info node `Coding Systems' and info node `Text and Binary' concerning |
8032 | such conversion. */); | |
9ce27fde KH |
8033 | inhibit_eol_conversion = 0; |
8034 | ||
ed29121d | 8035 | DEFVAR_BOOL ("inherit-process-coding-system", &inherit_process_coding_system, |
df7492f9 KH |
8036 | doc: /* |
8037 | Non-nil means process buffer inherits coding system of process output. | |
48b0f3ae PJ |
8038 | Bind it to t if the process output is to be treated as if it were a file |
8039 | read from some filesystem. */); | |
ed29121d EZ |
8040 | inherit_process_coding_system = 0; |
8041 | ||
02ba4723 | 8042 | DEFVAR_LISP ("file-coding-system-alist", &Vfile_coding_system_alist, |
df7492f9 KH |
8043 | doc: /* |
8044 | Alist to decide a coding system to use for a file I/O operation. | |
48b0f3ae PJ |
8045 | The format is ((PATTERN . VAL) ...), |
8046 | where PATTERN is a regular expression matching a file name, | |
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 and encoding | |
8049 | the file contents. | |
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 | |
0192762c DL |
8053 | or a cons of coding systems which are used as above. The function gets |
8054 | the arguments with which `find-operation-coding-systems' was called. | |
48b0f3ae PJ |
8055 | |
8056 | See also the function `find-operation-coding-system' | |
8057 | and the variable `auto-coding-alist'. */); | |
02ba4723 KH |
8058 | Vfile_coding_system_alist = Qnil; |
8059 | ||
8060 | DEFVAR_LISP ("process-coding-system-alist", &Vprocess_coding_system_alist, | |
df7492f9 KH |
8061 | doc: /* |
8062 | Alist to decide a coding system to use for a process I/O operation. | |
48b0f3ae PJ |
8063 | The format is ((PATTERN . VAL) ...), |
8064 | where PATTERN is a regular expression matching a program name, | |
8065 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
8066 | If VAL is a coding system, it is used for both decoding what received | |
8067 | from the program and encoding what sent to the program. | |
8068 | If VAL is a cons of coding systems, the car part is used for decoding, | |
8069 | and the cdr part is used for encoding. | |
8070 | If VAL is a function symbol, the function must return a coding system | |
8071 | or a cons of coding systems which are used as above. | |
8072 | ||
8073 | See also the function `find-operation-coding-system'. */); | |
02ba4723 KH |
8074 | Vprocess_coding_system_alist = Qnil; |
8075 | ||
8076 | DEFVAR_LISP ("network-coding-system-alist", &Vnetwork_coding_system_alist, | |
df7492f9 KH |
8077 | doc: /* |
8078 | Alist to decide a coding system to use for a network I/O operation. | |
48b0f3ae PJ |
8079 | The format is ((PATTERN . VAL) ...), |
8080 | where PATTERN is a regular expression matching a network service name | |
8081 | or is a port number to connect to, | |
8082 | VAL is a coding system, a cons of coding systems, or a function symbol. | |
8083 | If VAL is a coding system, it is used for both decoding what received | |
8084 | from the network stream and encoding what sent to the network stream. | |
8085 | If VAL is a cons of coding systems, the car part is used for decoding, | |
8086 | and the cdr part is used for encoding. | |
8087 | If VAL is a function symbol, the function must return a coding system | |
8088 | or a cons of coding systems which are used as above. | |
8089 | ||
8090 | See also the function `find-operation-coding-system'. */); | |
02ba4723 | 8091 | Vnetwork_coding_system_alist = Qnil; |
4ed46869 | 8092 | |
68c45bf0 | 8093 | DEFVAR_LISP ("locale-coding-system", &Vlocale_coding_system, |
75205970 RS |
8094 | doc: /* Coding system to use with system messages. |
8095 | Also used for decoding keyboard input on X Window system. */); | |
68c45bf0 PE |
8096 | Vlocale_coding_system = Qnil; |
8097 | ||
005f0d35 | 8098 | /* The eol mnemonics are reset in startup.el system-dependently. */ |
7722baf9 | 8099 | DEFVAR_LISP ("eol-mnemonic-unix", &eol_mnemonic_unix, |
df7492f9 KH |
8100 | doc: /* |
8101 | *String displayed in mode line for UNIX-like (LF) end-of-line format. */); | |
7722baf9 | 8102 | eol_mnemonic_unix = build_string (":"); |
4ed46869 | 8103 | |
7722baf9 | 8104 | DEFVAR_LISP ("eol-mnemonic-dos", &eol_mnemonic_dos, |
df7492f9 KH |
8105 | doc: /* |
8106 | *String displayed in mode line for DOS-like (CRLF) end-of-line format. */); | |
7722baf9 | 8107 | eol_mnemonic_dos = build_string ("\\"); |
4ed46869 | 8108 | |
7722baf9 | 8109 | DEFVAR_LISP ("eol-mnemonic-mac", &eol_mnemonic_mac, |
df7492f9 KH |
8110 | doc: /* |
8111 | *String displayed in mode line for MAC-like (CR) end-of-line format. */); | |
7722baf9 | 8112 | eol_mnemonic_mac = build_string ("/"); |
4ed46869 | 8113 | |
7722baf9 | 8114 | DEFVAR_LISP ("eol-mnemonic-undecided", &eol_mnemonic_undecided, |
df7492f9 KH |
8115 | doc: /* |
8116 | *String displayed in mode line when end-of-line format is not yet determined. */); | |
7722baf9 | 8117 | eol_mnemonic_undecided = build_string (":"); |
4ed46869 | 8118 | |
84fbb8a0 | 8119 | DEFVAR_LISP ("enable-character-translation", &Venable_character_translation, |
df7492f9 KH |
8120 | doc: /* |
8121 | *Non-nil enables character translation while encoding and decoding. */); | |
84fbb8a0 | 8122 | Venable_character_translation = Qt; |
bdd9fb48 | 8123 | |
f967223b | 8124 | DEFVAR_LISP ("standard-translation-table-for-decode", |
48b0f3ae PJ |
8125 | &Vstandard_translation_table_for_decode, |
8126 | doc: /* Table for translating characters while decoding. */); | |
f967223b | 8127 | Vstandard_translation_table_for_decode = Qnil; |
bdd9fb48 | 8128 | |
f967223b | 8129 | DEFVAR_LISP ("standard-translation-table-for-encode", |
48b0f3ae PJ |
8130 | &Vstandard_translation_table_for_encode, |
8131 | doc: /* Table for translating characters while encoding. */); | |
f967223b | 8132 | Vstandard_translation_table_for_encode = Qnil; |
4ed46869 | 8133 | |
df7492f9 | 8134 | DEFVAR_LISP ("charset-revision-table", &Vcharset_revision_table, |
48b0f3ae PJ |
8135 | doc: /* Alist of charsets vs revision numbers. |
8136 | While encoding, if a charset (car part of an element) is found, | |
df7492f9 KH |
8137 | designate it with the escape sequence identifying revision (cdr part |
8138 | of the element). */); | |
8139 | Vcharset_revision_table = Qnil; | |
02ba4723 KH |
8140 | |
8141 | DEFVAR_LISP ("default-process-coding-system", | |
8142 | &Vdefault_process_coding_system, | |
48b0f3ae PJ |
8143 | doc: /* Cons of coding systems used for process I/O by default. |
8144 | The car part is used for decoding a process output, | |
8145 | the cdr part is used for encoding a text to be sent to a process. */); | |
02ba4723 | 8146 | Vdefault_process_coding_system = Qnil; |
c4825358 | 8147 | |
3f003981 | 8148 | DEFVAR_LISP ("latin-extra-code-table", &Vlatin_extra_code_table, |
df7492f9 KH |
8149 | doc: /* |
8150 | Table of extra Latin codes in the range 128..159 (inclusive). | |
48b0f3ae PJ |
8151 | This is a vector of length 256. |
8152 | If Nth element is non-nil, the existence of code N in a file | |
8153 | \(or output of subprocess) doesn't prevent it to be detected as | |
8154 | a coding system of ISO 2022 variant which has a flag | |
8155 | `accept-latin-extra-code' t (e.g. iso-latin-1) on reading a file | |
8156 | or reading output of a subprocess. | |
8157 | Only 128th through 159th elements has a meaning. */); | |
3f003981 | 8158 | Vlatin_extra_code_table = Fmake_vector (make_number (256), Qnil); |
d46c5b12 KH |
8159 | |
8160 | DEFVAR_LISP ("select-safe-coding-system-function", | |
8161 | &Vselect_safe_coding_system_function, | |
df7492f9 KH |
8162 | doc: /* |
8163 | Function to call to select safe coding system for encoding a text. | |
48b0f3ae PJ |
8164 | |
8165 | If set, this function is called to force a user to select a proper | |
8166 | coding system which can encode the text in the case that a default | |
8167 | coding system used in each operation can't encode the text. | |
8168 | ||
8169 | The default value is `select-safe-coding-system' (which see). */); | |
d46c5b12 KH |
8170 | Vselect_safe_coding_system_function = Qnil; |
8171 | ||
22ab2303 | 8172 | DEFVAR_BOOL ("inhibit-iso-escape-detection", |
74383408 | 8173 | &inhibit_iso_escape_detection, |
df7492f9 KH |
8174 | doc: /* |
8175 | If non-nil, Emacs ignores ISO2022's escape sequence on code detection. | |
48b0f3ae PJ |
8176 | |
8177 | By default, on reading a file, Emacs tries to detect how the text is | |
8178 | encoded. This code detection is sensitive to escape sequences. If | |
8179 | the sequence is valid as ISO2022, the code is determined as one of | |
8180 | the ISO2022 encodings, and the file is decoded by the corresponding | |
8181 | coding system (e.g. `iso-2022-7bit'). | |
8182 | ||
8183 | However, there may be a case that you want to read escape sequences in | |
8184 | a file as is. In such a case, you can set this variable to non-nil. | |
8185 | Then, as the code detection ignores any escape sequences, no file is | |
8186 | detected as encoded in some ISO2022 encoding. The result is that all | |
8187 | escape sequences become visible in a buffer. | |
8188 | ||
8189 | The default value is nil, and it is strongly recommended not to change | |
8190 | it. That is because many Emacs Lisp source files that contain | |
8191 | non-ASCII characters are encoded by the coding system `iso-2022-7bit' | |
8192 | in Emacs's distribution, and they won't be decoded correctly on | |
8193 | reading if you suppress escape sequence detection. | |
8194 | ||
8195 | The other way to read escape sequences in a file without decoding is | |
8196 | to explicitly specify some coding system that doesn't use ISO2022's | |
8197 | escape sequence (e.g `latin-1') on reading by \\[universal-coding-system-argument]. */); | |
74383408 | 8198 | inhibit_iso_escape_detection = 0; |
2c78b7e1 KH |
8199 | |
8200 | { | |
8201 | Lisp_Object args[coding_arg_max]; | |
8202 | Lisp_Object plist[14]; | |
8203 | int i; | |
8204 | ||
8205 | for (i = 0; i < coding_arg_max; i++) | |
8206 | args[i] = Qnil; | |
8207 | ||
8208 | plist[0] = intern (":name"); | |
8209 | plist[1] = args[coding_arg_name] = Qno_conversion; | |
8210 | plist[2] = intern (":mnemonic"); | |
8211 | plist[3] = args[coding_arg_mnemonic] = make_number ('='); | |
8212 | plist[4] = intern (":coding-type"); | |
8213 | plist[5] = args[coding_arg_coding_type] = Qraw_text; | |
8214 | plist[6] = intern (":ascii-compatible-p"); | |
8215 | plist[7] = args[coding_arg_ascii_compatible_p] = Qt; | |
8216 | plist[8] = intern (":default-char"); | |
8217 | plist[9] = args[coding_arg_default_char] = make_number (0); | |
8218 | plist[10] = intern (":docstring"); | |
8219 | plist[11] = build_string ("Do no conversion.\n\ | |
8220 | \n\ | |
8221 | When you visit a file with this coding, the file is read into a\n\ | |
8222 | unibyte buffer as is, thus each byte of a file is treated as a\n\ | |
8223 | character."); | |
8224 | plist[12] = intern (":eol-type"); | |
8225 | plist[13] = args[coding_arg_eol_type] = Qunix; | |
8226 | args[coding_arg_plist] = Flist (14, plist); | |
8227 | Fdefine_coding_system_internal (coding_arg_max, args); | |
8228 | } | |
8229 | ||
8230 | setup_coding_system (Qno_conversion, &keyboard_coding); | |
8231 | setup_coding_system (Qno_conversion, &terminal_coding); | |
8232 | setup_coding_system (Qno_conversion, &safe_terminal_coding); | |
4ed46869 KH |
8233 | } |
8234 | ||
68c45bf0 PE |
8235 | char * |
8236 | emacs_strerror (error_number) | |
8237 | int error_number; | |
8238 | { | |
8239 | char *str; | |
8240 | ||
ca9c0567 | 8241 | synchronize_system_messages_locale (); |
68c45bf0 PE |
8242 | str = strerror (error_number); |
8243 | ||
8244 | if (! NILP (Vlocale_coding_system)) | |
8245 | { | |
8246 | Lisp_Object dec = code_convert_string_norecord (build_string (str), | |
8247 | Vlocale_coding_system, | |
8248 | 0); | |
8249 | str = (char *) XSTRING (dec)->data; | |
8250 | } | |
8251 | ||
8252 | return str; | |
8253 | } | |
8254 | ||
4ed46869 | 8255 | #endif /* emacs */ |