Commit | Line | Data |
---|---|---|
4ed46869 | 1 | /* Header for coding system handler. |
75c8c592 RS |
2 | Copyright (C) 1995, 1997 Electrotechnical Laboratory, JAPAN. |
3 | Licensed to the Free Software Foundation. | |
4ed46869 | 4 | |
369314dc KH |
5 | This file is part of GNU Emacs. |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
4ed46869 | 11 | |
369314dc KH |
12 | GNU Emacs is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
4ed46869 | 16 | |
369314dc KH |
17 | You should have received a copy of the GNU General Public License |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
4ed46869 | 21 | |
6f776e81 KH |
22 | #ifndef EMACS_CODING_H |
23 | #define EMACS_CODING_H | |
4ed46869 | 24 | |
2ea6666c | 25 | #include "ccl.h" |
4ed46869 | 26 | |
0ef69138 | 27 | /*** EMACS' INTERNAL FORMAT (emacs-mule) section ***/ |
4ed46869 KH |
28 | |
29 | /* All code (1-byte) of Emacs' internal format is classified into one | |
30 | of the followings. See also `charset.h'. */ | |
31 | enum emacs_code_class_type | |
32 | { | |
33 | EMACS_control_code, /* Control codes in the range | |
34 | 0x00..0x1F and 0x7F except for the | |
35 | following two codes. */ | |
36 | EMACS_linefeed_code, /* 0x0A (linefeed) to denote | |
37 | end-of-line. */ | |
38 | EMACS_carriage_return_code, /* 0x0D (carriage-return) to be used | |
39 | in selective display mode. */ | |
40 | EMACS_ascii_code, /* ASCII characters. */ | |
4ed46869 KH |
41 | EMACS_leading_code_2, /* Base leading code of official |
42 | TYPE9N character. */ | |
43 | EMACS_leading_code_3, /* Base leading code of private TYPE9N | |
44 | or official TYPE9Nx9N character. */ | |
45 | EMACS_leading_code_4, /* Base leading code of private | |
46 | TYPE9Nx9N character. */ | |
47 | EMACS_invalid_code /* Invalid code, i.e. a base leading | |
48 | code not yet assigned to any | |
49 | charset, or a code of the range | |
50 | 0xA0..0xFF. */ | |
51 | }; | |
52 | ||
53 | extern enum emacs_code_class_type emacs_code_class[256]; | |
54 | ||
55 | /*** ISO2022 section ***/ | |
56 | ||
57 | /* Macros to define code of control characters for ISO2022's functions. */ | |
58 | /* code */ /* function */ | |
59 | #define ISO_CODE_LF 0x0A /* line-feed */ | |
60 | #define ISO_CODE_CR 0x0D /* carriage-return */ | |
61 | #define ISO_CODE_SO 0x0E /* shift-out */ | |
62 | #define ISO_CODE_SI 0x0F /* shift-in */ | |
63 | #define ISO_CODE_SS2_7 0x19 /* single-shift-2 for 7-bit code */ | |
64 | #define ISO_CODE_ESC 0x1B /* escape */ | |
65 | #define ISO_CODE_SS2 0x8E /* single-shift-2 */ | |
66 | #define ISO_CODE_SS3 0x8F /* single-shift-3 */ | |
67 | #define ISO_CODE_CSI 0x9B /* control-sequence-introduce */ | |
68 | ||
69 | /* All code (1-byte) of ISO2022 is classified into one of the | |
70 | followings. */ | |
71 | enum iso_code_class_type | |
72 | { | |
811ea086 KH |
73 | ISO_control_0, /* Control codes in the range |
74 | 0x00..0x1F and 0x7F, except for the | |
75 | following 5 codes. */ | |
4ed46869 KH |
76 | ISO_carriage_return, /* ISO_CODE_CR (0x0D) */ |
77 | ISO_shift_out, /* ISO_CODE_SO (0x0E) */ | |
78 | ISO_shift_in, /* ISO_CODE_SI (0x0F) */ | |
79 | ISO_single_shift_2_7, /* ISO_CODE_SS2_7 (0x19) */ | |
80 | ISO_escape, /* ISO_CODE_SO (0x1B) */ | |
811ea086 KH |
81 | ISO_control_1, /* Control codes in the range |
82 | 0x80..0x9F, except for the | |
83 | following 3 codes. */ | |
4ed46869 KH |
84 | ISO_single_shift_2, /* ISO_CODE_SS2 (0x8E) */ |
85 | ISO_single_shift_3, /* ISO_CODE_SS3 (0x8F) */ | |
86 | ISO_control_sequence_introducer, /* ISO_CODE_CSI (0x9B) */ | |
87 | ISO_0x20_or_0x7F, /* Codes of the values 0x20 or 0x7F. */ | |
88 | ISO_graphic_plane_0, /* Graphic codes in the range 0x21..0x7E. */ | |
89 | ISO_0xA0_or_0xFF, /* Codes of the values 0xA0 or 0xFF. */ | |
90 | ISO_graphic_plane_1 /* Graphic codes in the range 0xA1..0xFE. */ | |
91 | }; | |
92 | ||
93 | /** The macros CODING_FLAG_ISO_XXX defines a flag bit of the `flags' | |
94 | element in the structure `coding_system'. This information is used | |
95 | while encoding a text to ISO2022. **/ | |
96 | ||
97 | /* If set, produce short-form designation sequence (e.g. ESC $ A) | |
98 | instead of long-form sequence (e.g. ESC $ ( A). */ | |
99 | #define CODING_FLAG_ISO_SHORT_FORM 0x0001 | |
100 | ||
101 | /* If set, reset graphic planes and registers at end-of-line to the | |
102 | initial state. */ | |
103 | #define CODING_FLAG_ISO_RESET_AT_EOL 0x0002 | |
104 | ||
105 | /* If set, reset graphic planes and registers before any control | |
106 | characters to the initial state. */ | |
107 | #define CODING_FLAG_ISO_RESET_AT_CNTL 0x0004 | |
108 | ||
109 | /* If set, encode by 7-bit environment. */ | |
110 | #define CODING_FLAG_ISO_SEVEN_BITS 0x0008 | |
111 | ||
112 | /* If set, use locking-shift function. */ | |
113 | #define CODING_FLAG_ISO_LOCKING_SHIFT 0x0010 | |
114 | ||
115 | /* If set, use single-shift function. Overwrite | |
116 | CODING_FLAG_ISO_LOCKING_SHIFT. */ | |
117 | #define CODING_FLAG_ISO_SINGLE_SHIFT 0x0020 | |
118 | ||
119 | /* If set, designate JISX0201-Roman instead of ASCII. */ | |
120 | #define CODING_FLAG_ISO_USE_ROMAN 0x0040 | |
121 | ||
122 | /* If set, designate JISX0208-1978 instead of JISX0208-1983. */ | |
123 | #define CODING_FLAG_ISO_USE_OLDJIS 0x0080 | |
124 | ||
125 | /* If set, do not produce ISO6429's direction specifying sequence. */ | |
126 | #define CODING_FLAG_ISO_NO_DIRECTION 0x0100 | |
127 | ||
8ddb35b2 KH |
128 | /* If set, assume designation states are reset at beginning of line on |
129 | output. */ | |
130 | #define CODING_FLAG_ISO_INIT_AT_BOL 0x0200 | |
131 | ||
132 | /* If set, designation sequence should be placed at beginning of line | |
133 | on output. */ | |
134 | #define CODING_FLAG_ISO_DESIGNATE_AT_BOL 0x0400 | |
135 | ||
1db9ba06 | 136 | /* If set, do not encode unsafe charactes on output. */ |
fbaa2ed9 KH |
137 | #define CODING_FLAG_ISO_SAFE 0x0800 |
138 | ||
c0c69d45 KH |
139 | /* If set, extra latin codes (128..159) are accepted as a valid code |
140 | on input. */ | |
141 | #define CODING_FLAG_ISO_LATIN_EXTRA 0x1000 | |
142 | ||
658cc252 KH |
143 | /* If set, use designation escape sequence. */ |
144 | #define CODING_FLAG_ISO_DESIGNATION 0x10000 | |
145 | ||
fbaa2ed9 KH |
146 | /* A character to be produced on output if encoding of the original |
147 | character is prohibited by CODING_FLAG_ISO_SAFE. */ | |
c0c69d45 | 148 | #define CODING_INHIBIT_CHARACTER_SUBSTITUTION 077 /* 077 == `?' */ |
fbaa2ed9 | 149 | |
4ed46869 KH |
150 | /* Structure of the field `spec.iso2022' in the structure `coding_system'. */ |
151 | struct iso2022_spec | |
152 | { | |
153 | /* The current graphic register invoked to each graphic plane. */ | |
154 | int current_invocation[2]; | |
155 | ||
156 | /* The current charset designated to each graphic register. */ | |
157 | int current_designation[4]; | |
158 | ||
159 | /* A charset initially designated to each graphic register. */ | |
160 | int initial_designation[4]; | |
161 | ||
658cc252 KH |
162 | /* If not -1, it is a graphic register specified in an invalid |
163 | designation sequence. */ | |
164 | int last_invalid_designation_register; | |
165 | ||
4ed46869 | 166 | /* A graphic register to which each charset should be designated. */ |
da30d5b1 | 167 | unsigned char requested_designation[MAX_CHARSET + 1]; |
4ed46869 | 168 | |
1db9ba06 KH |
169 | /* A revision number to be specified for each charset on encoding. |
170 | The value 255 means no revision number for the corresponding | |
171 | charset. */ | |
172 | unsigned char charset_revision_number[MAX_CHARSET + 1]; | |
e6de76f8 | 173 | |
4ed46869 KH |
174 | /* Set to 1 temporarily only when graphic register 2 or 3 is invoked |
175 | by single-shift while encoding. */ | |
176 | int single_shifting; | |
8ddb35b2 KH |
177 | |
178 | /* Set to 1 temporarily only when processing at beginning of line. */ | |
179 | int bol; | |
4ed46869 KH |
180 | }; |
181 | ||
182 | /* Macros to access each field in the structure `spec.iso2022'. */ | |
183 | #define CODING_SPEC_ISO_INVOCATION(coding, plane) \ | |
658cc252 | 184 | (coding)->spec.iso2022.current_invocation[plane] |
4ed46869 | 185 | #define CODING_SPEC_ISO_DESIGNATION(coding, reg) \ |
658cc252 | 186 | (coding)->spec.iso2022.current_designation[reg] |
4ed46869 | 187 | #define CODING_SPEC_ISO_INITIAL_DESIGNATION(coding, reg) \ |
658cc252 | 188 | (coding)->spec.iso2022.initial_designation[reg] |
4ed46869 | 189 | #define CODING_SPEC_ISO_REQUESTED_DESIGNATION(coding, charset) \ |
658cc252 | 190 | (coding)->spec.iso2022.requested_designation[charset] |
1db9ba06 | 191 | #define CODING_SPEC_ISO_REVISION_NUMBER(coding, charset) \ |
658cc252 | 192 | (coding)->spec.iso2022.charset_revision_number[charset] |
4ed46869 | 193 | #define CODING_SPEC_ISO_SINGLE_SHIFTING(coding) \ |
658cc252 | 194 | (coding)->spec.iso2022.single_shifting |
8ddb35b2 | 195 | #define CODING_SPEC_ISO_BOL(coding) \ |
658cc252 | 196 | (coding)->spec.iso2022.bol |
4ed46869 | 197 | |
da30d5b1 KH |
198 | /* A value which may appear in |
199 | coding->spec.iso2022.requested_designation indicating that the | |
200 | corresponding charset does not request any graphic register to be | |
201 | designated. */ | |
202 | #define CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION 4 | |
203 | ||
4ed46869 KH |
204 | /* Return a charset which is currently designated to the graphic plane |
205 | PLANE in the coding-system CODING. */ | |
ceb58510 KH |
206 | #define CODING_SPEC_ISO_PLANE_CHARSET(coding, plane) \ |
207 | ((CODING_SPEC_ISO_INVOCATION (coding, plane) < 0) \ | |
208 | ? -1 \ | |
209 | : CODING_SPEC_ISO_DESIGNATION (coding, \ | |
210 | CODING_SPEC_ISO_INVOCATION (coding, plane))) | |
4ed46869 KH |
211 | |
212 | /*** BIG5 section ***/ | |
213 | ||
214 | /* Macros to denote each type of BIG5 coding system. */ | |
215 | #define CODING_FLAG_BIG5_HKU 0x00 /* BIG5-HKU is one of variants of | |
216 | BIG5 developed by Hong Kong | |
217 | University. */ | |
218 | #define CODING_FLAG_BIG5_ETEN 0x01 /* BIG5_ETen is one of variants | |
219 | of BIG5 developed by the | |
220 | company ETen in Taiwan. */ | |
221 | ||
222 | /*** GENERAL section ***/ | |
223 | ||
224 | /* Types of coding system. */ | |
225 | enum coding_type | |
226 | { | |
227 | coding_type_no_conversion, /* A coding system which requires no | |
228 | conversion for reading and writing | |
229 | including end-of-line format. */ | |
0ef69138 | 230 | coding_type_emacs_mule, /* A coding system used in Emacs' |
4ed46869 KH |
231 | buffer and string. Requires no |
232 | conversion for reading and writing | |
233 | except for end-of-line format. */ | |
0ef69138 | 234 | coding_type_undecided, /* A coding system which requires |
4ed46869 KH |
235 | automatic detection of a real |
236 | coding system. */ | |
237 | coding_type_sjis, /* SJIS coding system for Japanese. */ | |
238 | coding_type_iso2022, /* Any coding system of ISO2022 | |
239 | variants. */ | |
240 | coding_type_big5, /* BIG5 coding system for Chinese. */ | |
e80de6b1 | 241 | coding_type_ccl, /* The coding system of which decoder |
4ed46869 | 242 | and encoder are written in CCL. */ |
e80de6b1 KH |
243 | coding_type_raw_text /* A coding system for a text |
244 | containing ramdom 8-bit code which | |
245 | does not require code conversion | |
246 | except for end-of-line format. */ | |
4ed46869 KH |
247 | }; |
248 | ||
249 | /* Formats of end-of-line. */ | |
250 | #define CODING_EOL_LF 0 /* Line-feed only, same as Emacs' | |
251 | internal format. */ | |
252 | #define CODING_EOL_CRLF 1 /* Sequence of carriage-return and | |
253 | line-feed. */ | |
254 | #define CODING_EOL_CR 2 /* Carriage-return only. */ | |
0ef69138 | 255 | #define CODING_EOL_UNDECIDED 3 /* This value is used to denote the |
4ed46869 | 256 | eol-type is not yet decided. */ |
e80de6b1 KH |
257 | #define CODING_EOL_INCONSISTENT 4 /* This value is used to denote the |
258 | eol-type is not consistent | |
259 | through the file. */ | |
4ed46869 | 260 | |
4ed46869 | 261 | /* 1 iff composing. */ |
279d9f7b KH |
262 | #define COMPOSING_P(coding) ((int) coding->composing > (int) COMPOSITION_NO) |
263 | ||
264 | #define COMPOSITION_DATA_SIZE 4080 | |
265 | #define COMPOSITION_DATA_MAX_BUNCH_LENGTH (4 + MAX_COMPOSITION_COMPONENTS*2) | |
266 | ||
267 | /* Data structure to hold information about compositions of text that | |
268 | is being decoded or encode. ISO 2022 base code conversion routines | |
269 | handle special ESC sequences for composition specification. But, | |
270 | they can't get/put such information directly from/to a buffer in | |
271 | the deepest place. So, they store or retrieve the information | |
272 | through this structure. | |
273 | ||
274 | The encoder stores the information in this structure when it meets | |
275 | ESC sequences for composition while encoding codes, then, after all | |
276 | text codes are encoded, puts `composition' properties on the text | |
277 | by refering the structure. | |
278 | ||
279 | The decoder at first stores the information of a text to be | |
280 | decoded, then, while decoding codes, generates ESC sequences for | |
281 | composition at proper places by refering the structure. */ | |
282 | ||
283 | struct composition_data | |
284 | { | |
285 | /* The character position of the first character to be encoded or | |
286 | decoded. START and END (see below) are relative to this | |
287 | position. */ | |
288 | int char_offset; | |
289 | ||
290 | /* The composition data. These elements are repeated for each | |
291 | composition: | |
292 | LENGTH START END METHOD [ COMPONENT ... ] | |
293 | where, | |
294 | LENGTH is the number of elements for this composition. | |
295 | ||
296 | START and END are starting and ending character positions of | |
297 | the composition relative to `char_offset'. | |
298 | ||
299 | METHOD is one of `enum cmposing_status' specifying the way of | |
300 | composition. | |
301 | ||
302 | COMPONENT is a character or an encoded composition rule. */ | |
303 | int data[COMPOSITION_DATA_SIZE]; | |
304 | ||
305 | /* The number of elements in `data' currently used. */ | |
306 | int used; | |
307 | ||
308 | /* Pointers to the previous and next structures. When `data' is | |
309 | filled up, another structure is allocated and linked in `next'. | |
310 | The new struture has backward link to this struture in `prev'. | |
311 | The number of chaind structures depends on how many compositions | |
312 | the text being encoded or decoded contains. */ | |
313 | struct composition_data *prev, *next; | |
314 | }; | |
4ed46869 | 315 | |
0749a608 | 316 | /* Macros used for the member `result' of the struct |
658cc252 KH |
317 | coding_system. */ |
318 | #define CODING_FINISH_NORMAL 0 | |
319 | #define CODING_FINISH_INSUFFICIENT_SRC 1 | |
320 | #define CODING_FINISH_INSUFFICIENT_DST 2 | |
321 | #define CODING_FINISH_INCONSISTENT_EOL 3 | |
279d9f7b KH |
322 | #define CODING_FINISH_INSUFFICIENT_CMP 4 |
323 | #define CODING_FINISH_INTERRUPT 5 | |
658cc252 | 324 | |
3b2d77fe | 325 | /* Macros used for the member `mode' of the struct coding_system. */ |
658cc252 KH |
326 | |
327 | /* If set, recover the original CR or LF of the already decoded text | |
328 | when the decoding routine encounters an inconsistent eol format. */ | |
329 | #define CODING_MODE_INHIBIT_INCONSISTENT_EOL 0x01 | |
330 | ||
331 | /* If set, the decoding/encoding routines treat the current data as | |
332 | the last block of the whole text to be converted, and do | |
333 | appropriate fisishing job. */ | |
334 | #define CODING_MODE_LAST_BLOCK 0x02 | |
335 | ||
336 | /* If set, it means that the current source text is in a buffer which | |
337 | enables selective display. */ | |
338 | #define CODING_MODE_SELECTIVE_DISPLAY 0x04 | |
339 | ||
340 | /* This flag is used by the decoding/encoding routines on the fly. If | |
341 | set, it means that right-to-left text is being processed. */ | |
342 | #define CODING_MODE_DIRECTION 0x08 | |
343 | ||
4ed46869 KH |
344 | struct coding_system |
345 | { | |
346 | /* Type of the coding system. */ | |
347 | enum coding_type type; | |
348 | ||
658cc252 KH |
349 | /* Type of end-of-line format (LF, CRLF, or CR) of the coding system. */ |
350 | int eol_type; | |
351 | ||
a5ee738b | 352 | /* Flag bits of the coding system. The meaning of each bit is common |
658cc252 | 353 | to all types of coding systems. */ |
a5ee738b | 354 | unsigned int common_flags; |
4ed46869 KH |
355 | |
356 | /* Flag bits of the coding system. The meaning of each bit depends | |
357 | on the type of the coding system. */ | |
358 | unsigned int flags; | |
359 | ||
658cc252 KH |
360 | /* Mode bits of the coding system. See the comments of the macros |
361 | CODING_MODE_XXX. */ | |
362 | unsigned int mode; | |
4ed46869 | 363 | |
279d9f7b | 364 | /* The current status of composition handling. */ |
4ed46869 KH |
365 | int composing; |
366 | ||
279d9f7b KH |
367 | /* 1 iff the next character is a composition rule. */ |
368 | int composition_rule_follows; | |
369 | ||
370 | /* Information of compositions are stored here on decoding and set | |
371 | in advance on encoding. */ | |
372 | struct composition_data *cmp_data; | |
373 | ||
374 | /* Index to cmp_data->data for the first element for the current | |
375 | composition. */ | |
376 | int cmp_data_start; | |
377 | ||
378 | /* Index to cmp_data->data for the current element for the current | |
379 | composition. */ | |
380 | int cmp_data_index; | |
450c60a5 | 381 | |
4ed46869 KH |
382 | /* Detailed information specific to each type of coding system. */ |
383 | union spec | |
384 | { | |
385 | struct iso2022_spec iso2022; | |
386 | struct ccl_spec ccl; /* Defined in ccl.h. */ | |
387 | } spec; | |
388 | ||
658cc252 KH |
389 | /* Index number of coding category of the coding system. */ |
390 | int category_idx; | |
391 | ||
d23ee514 KH |
392 | /* The following two members specify how characters 128..159 are |
393 | represented in source and destination text respectively. 1 means | |
394 | they are represented by 2-byte sequence, 0 means they are | |
395 | represented by 1-byte as is (see the comment in charset.h). */ | |
811ea086 KH |
396 | unsigned src_multibyte : 1; |
397 | unsigned dst_multibyte : 1; | |
398 | ||
a137bb00 KH |
399 | /* How may heading bytes we can skip for decoding. This is set to |
400 | -1 in setup_coding_system, and updated by detect_coding. So, | |
401 | when this is equal to the byte length of the text being | |
402 | converted, we can skip the actual conversion process. */ | |
658cc252 KH |
403 | int heading_ascii; |
404 | ||
405 | /* The following members are set by encoding/decoding routine. */ | |
406 | int produced, produced_char, consumed, consumed_char; | |
407 | ||
811ea086 KH |
408 | /* Number of error source data found in a decoding routine. */ |
409 | int errors; | |
410 | ||
411 | /* Finish status of code conversion. It should be one of macros | |
412 | CODING_FINISH_XXXX. */ | |
413 | int result; | |
e6a9a0bc | 414 | |
658cc252 KH |
415 | /* The following members are all Lisp symbols. We don't have to |
416 | protect them from GC because the current garbage collection | |
417 | doesn't relocate Lisp symbols. But, when it is changed, we must | |
418 | find a way to protect them. */ | |
419 | ||
4ed46869 KH |
420 | /* Backward pointer to the Lisp symbol of the coding system. */ |
421 | Lisp_Object symbol; | |
422 | ||
423 | /* Lisp function (symbol) to be called after decoding to do | |
658cc252 | 424 | additional conversion, or nil. */ |
4ed46869 KH |
425 | Lisp_Object post_read_conversion; |
426 | ||
427 | /* Lisp function (symbol) to be called before encoding to do | |
658cc252 | 428 | additional conversion, or nil. */ |
4ed46869 KH |
429 | Lisp_Object pre_write_conversion; |
430 | ||
ab45712c | 431 | /* Character translation tables to look up, or nil. */ |
f967223b KH |
432 | Lisp_Object translation_table_for_decode; |
433 | Lisp_Object translation_table_for_encode; | |
4ed46869 KH |
434 | }; |
435 | ||
a5ee738b KH |
436 | #define CODING_REQUIRE_FLUSHING_MASK 1 |
437 | #define CODING_REQUIRE_DECODING_MASK 2 | |
438 | #define CODING_REQUIRE_ENCODING_MASK 4 | |
439 | #define CODING_REQUIRE_DETECTION_MASK 8 | |
440 | ||
441 | /* Return 1 if the coding system CODING requires specific code to be | |
442 | attached at the tail of converted text. */ | |
443 | #define CODING_REQUIRE_FLUSHING(coding) \ | |
444 | ((coding)->common_flags & CODING_REQUIRE_FLUSHING_MASK) | |
445 | ||
446 | /* Return 1 if the coding system CODING requires code conversion on | |
447 | decoding. */ | |
448 | #define CODING_REQUIRE_DECODING(coding) \ | |
811ea086 KH |
449 | ((coding)->dst_multibyte \ |
450 | || (coding)->common_flags & CODING_REQUIRE_DECODING_MASK) | |
a5ee738b KH |
451 | |
452 | /* Return 1 if the coding system CODING requires code conversion on | |
453 | encoding. */ | |
454 | #define CODING_REQUIRE_ENCODING(coding) \ | |
811ea086 KH |
455 | ((coding)->src_multibyte \ |
456 | || (coding)->common_flags & CODING_REQUIRE_ENCODING_MASK) | |
a5ee738b KH |
457 | |
458 | /* Return 1 if the coding system CODING requires some kind of code | |
459 | detection. */ | |
460 | #define CODING_REQUIRE_DETECTION(coding) \ | |
461 | ((coding)->common_flags & CODING_REQUIRE_DETECTION_MASK) | |
462 | ||
811ea086 KH |
463 | /* Return 1 if the coding system CODING requires code conversion on |
464 | decoding or some kind of code detection. */ | |
658cc252 | 465 | #define CODING_MAY_REQUIRE_DECODING(coding) \ |
811ea086 KH |
466 | (CODING_REQUIRE_DECODING (coding) \ |
467 | || CODING_REQUIRE_DETECTION (coding)) | |
4ed46869 KH |
468 | |
469 | /* Index for each coding category in `coding_category_table' */ | |
0ef69138 | 470 | #define CODING_CATEGORY_IDX_EMACS_MULE 0 |
4ed46869 KH |
471 | #define CODING_CATEGORY_IDX_SJIS 1 |
472 | #define CODING_CATEGORY_IDX_ISO_7 2 | |
658cc252 KH |
473 | #define CODING_CATEGORY_IDX_ISO_7_TIGHT 3 |
474 | #define CODING_CATEGORY_IDX_ISO_8_1 4 | |
475 | #define CODING_CATEGORY_IDX_ISO_8_2 5 | |
476 | #define CODING_CATEGORY_IDX_ISO_7_ELSE 6 | |
477 | #define CODING_CATEGORY_IDX_ISO_8_ELSE 7 | |
8469bb88 KH |
478 | #define CODING_CATEGORY_IDX_CCL 8 |
479 | #define CODING_CATEGORY_IDX_BIG5 9 | |
62537270 KH |
480 | #define CODING_CATEGORY_IDX_UTF_8 10 |
481 | #define CODING_CATEGORY_IDX_UTF_16_BE 11 | |
482 | #define CODING_CATEGORY_IDX_UTF_16_LE 12 | |
483 | #define CODING_CATEGORY_IDX_RAW_TEXT 13 | |
484 | #define CODING_CATEGORY_IDX_BINARY 14 | |
485 | #define CODING_CATEGORY_IDX_MAX 15 | |
4ed46869 KH |
486 | |
487 | /* Definitions of flag bits returned by the function | |
488 | detect_coding_mask (). */ | |
0ef69138 | 489 | #define CODING_CATEGORY_MASK_EMACS_MULE (1 << CODING_CATEGORY_IDX_EMACS_MULE) |
4ed46869 KH |
490 | #define CODING_CATEGORY_MASK_SJIS (1 << CODING_CATEGORY_IDX_SJIS) |
491 | #define CODING_CATEGORY_MASK_ISO_7 (1 << CODING_CATEGORY_IDX_ISO_7) | |
658cc252 | 492 | #define CODING_CATEGORY_MASK_ISO_7_TIGHT (1 << CODING_CATEGORY_IDX_ISO_7_TIGHT) |
4ed46869 KH |
493 | #define CODING_CATEGORY_MASK_ISO_8_1 (1 << CODING_CATEGORY_IDX_ISO_8_1) |
494 | #define CODING_CATEGORY_MASK_ISO_8_2 (1 << CODING_CATEGORY_IDX_ISO_8_2) | |
a38ede41 KH |
495 | #define CODING_CATEGORY_MASK_ISO_7_ELSE (1 << CODING_CATEGORY_IDX_ISO_7_ELSE) |
496 | #define CODING_CATEGORY_MASK_ISO_8_ELSE (1 << CODING_CATEGORY_IDX_ISO_8_ELSE) | |
8469bb88 | 497 | #define CODING_CATEGORY_MASK_CCL (1 << CODING_CATEGORY_IDX_CCL) |
4ed46869 | 498 | #define CODING_CATEGORY_MASK_BIG5 (1 << CODING_CATEGORY_IDX_BIG5) |
62537270 KH |
499 | #define CODING_CATEGORY_MASK_UTF_8 (1 << CODING_CATEGORY_IDX_UTF_8) |
500 | #define CODING_CATEGORY_MASK_UTF_16_BE (1 << CODING_CATEGORY_IDX_UTF_16_BE) | |
501 | #define CODING_CATEGORY_MASK_UTF_16_LE (1 << CODING_CATEGORY_IDX_UTF_16_LE) | |
f1651811 | 502 | #define CODING_CATEGORY_MASK_RAW_TEXT (1 << CODING_CATEGORY_IDX_RAW_TEXT) |
1f312d8a | 503 | #define CODING_CATEGORY_MASK_BINARY (1 << CODING_CATEGORY_IDX_BINARY) |
4ed46869 KH |
504 | |
505 | /* This value is returned if detect_coding_mask () find nothing other | |
506 | than ASCII characters. */ | |
507 | #define CODING_CATEGORY_MASK_ANY \ | |
0ef69138 | 508 | ( CODING_CATEGORY_MASK_EMACS_MULE \ |
4ed46869 KH |
509 | | CODING_CATEGORY_MASK_SJIS \ |
510 | | CODING_CATEGORY_MASK_ISO_7 \ | |
658cc252 | 511 | | CODING_CATEGORY_MASK_ISO_7_TIGHT \ |
4ed46869 KH |
512 | | CODING_CATEGORY_MASK_ISO_8_1 \ |
513 | | CODING_CATEGORY_MASK_ISO_8_2 \ | |
a38ede41 KH |
514 | | CODING_CATEGORY_MASK_ISO_7_ELSE \ |
515 | | CODING_CATEGORY_MASK_ISO_8_ELSE \ | |
8469bb88 | 516 | | CODING_CATEGORY_MASK_CCL \ |
62537270 KH |
517 | | CODING_CATEGORY_MASK_BIG5 \ |
518 | | CODING_CATEGORY_MASK_UTF_8 \ | |
519 | | CODING_CATEGORY_MASK_UTF_16_BE \ | |
520 | | CODING_CATEGORY_MASK_UTF_16_LE) | |
4ed46869 | 521 | |
658cc252 KH |
522 | #define CODING_CATEGORY_MASK_ISO_7BIT \ |
523 | (CODING_CATEGORY_MASK_ISO_7 | CODING_CATEGORY_MASK_ISO_7_TIGHT) | |
524 | ||
525 | #define CODING_CATEGORY_MASK_ISO_8BIT \ | |
526 | (CODING_CATEGORY_MASK_ISO_8_1 | CODING_CATEGORY_MASK_ISO_8_2) | |
527 | ||
528 | #define CODING_CATEGORY_MASK_ISO_SHIFT \ | |
529 | (CODING_CATEGORY_MASK_ISO_7_ELSE | CODING_CATEGORY_MASK_ISO_8_ELSE) | |
530 | ||
531 | #define CODING_CATEGORY_MASK_ISO \ | |
532 | ( CODING_CATEGORY_MASK_ISO_7BIT \ | |
533 | | CODING_CATEGORY_MASK_ISO_SHIFT \ | |
534 | | CODING_CATEGORY_MASK_ISO_8BIT) | |
535 | ||
62537270 KH |
536 | #define CODING_CATEGORY_MASK_UTF_16_BE_LE \ |
537 | (CODING_CATEGORY_MASK_UTF_16_BE | CODING_CATEGORY_MASK_UTF_16_LE) | |
538 | ||
4ed46869 KH |
539 | /* Macros to decode or encode a character of JISX0208 in SJIS. S1 and |
540 | S2 are the 1st and 2nd position-codes of JISX0208 in SJIS coding | |
541 | system. C1 and C2 are the 1st and 2nd position codes of Emacs' | |
542 | internal format. */ | |
543 | ||
544 | #define DECODE_SJIS(s1, s2, c1, c2) \ | |
545 | do { \ | |
546 | if (s2 >= 0x9F) \ | |
547 | c1 = s1 * 2 - (s1 >= 0xE0 ? 0x160 : 0xE0), \ | |
548 | c2 = s2 - 0x7E; \ | |
549 | else \ | |
550 | c1 = s1 * 2 - ((s1 >= 0xE0) ? 0x161 : 0xE1), \ | |
551 | c2 = s2 - ((s2 >= 0x7F) ? 0x20 : 0x1F); \ | |
552 | } while (0) | |
553 | ||
554 | #define ENCODE_SJIS(c1, c2, s1, s2) \ | |
555 | do { \ | |
556 | if (c1 & 1) \ | |
557 | s1 = c1 / 2 + ((c1 < 0x5F) ? 0x71 : 0xB1), \ | |
558 | s2 = c2 + ((c2 >= 0x60) ? 0x20 : 0x1F); \ | |
559 | else \ | |
560 | s1 = c1 / 2 + ((c1 < 0x5F) ? 0x70 : 0xB0), \ | |
561 | s2 = c2 + 0x7E; \ | |
562 | } while (0) | |
563 | ||
290591c8 KH |
564 | /* Encode the file name NAME using the specified coding system |
565 | for file names, if any. */ | |
566 | #define ENCODE_FILE(name) \ | |
567 | (! NILP (Vfile_name_coding_system) \ | |
568 | && XFASTINT (Vfile_name_coding_system) != 0 \ | |
afee9150 | 569 | ? code_convert_string_norecord (name, Vfile_name_coding_system, 1) \ |
290591c8 | 570 | : (! NILP (Vdefault_file_name_coding_system) \ |
afee9150 KH |
571 | && XFASTINT (Vdefault_file_name_coding_system) != 0 \ |
572 | ? code_convert_string_norecord (name, Vdefault_file_name_coding_system, 1) \ | |
290591c8 KH |
573 | : name)) |
574 | ||
575 | /* Decode the file name NAME using the specified coding system | |
576 | for file names, if any. */ | |
577 | #define DECODE_FILE(name) \ | |
578 | (! NILP (Vfile_name_coding_system) \ | |
579 | && XFASTINT (Vfile_name_coding_system) != 0 \ | |
afee9150 | 580 | ? code_convert_string_norecord (name, Vfile_name_coding_system, 0) \ |
290591c8 | 581 | : (! NILP (Vdefault_file_name_coding_system) \ |
afee9150 KH |
582 | && XFASTINT (Vdefault_file_name_coding_system) != 0 \ |
583 | ? code_convert_string_norecord (name, Vdefault_file_name_coding_system, 0) \ | |
290591c8 KH |
584 | : name)) |
585 | ||
2dfda962 JR |
586 | #ifdef WINDOWSNT |
587 | /* Encode the string STR using the specified coding system | |
588 | for w32 system functions, if any. */ | |
589 | #define ENCODE_SYSTEM(str) \ | |
590 | (! NILP (Vw32_system_coding_system) \ | |
591 | && XFASTINT (Vw32_system_coding_system) != 0 \ | |
592 | ? code_convert_string_norecord (str, Vw32_system_coding_system, 1) \ | |
593 | : str) | |
594 | ||
595 | /* Decode the string STR using the specified coding system | |
596 | for w32 system functions, if any. */ | |
597 | #define DECODE_SYSTEM(name) \ | |
598 | (! NILP (Vw32_system_coding_system) \ | |
599 | && XFASTINT (Vw32_system_coding_system) != 0 \ | |
600 | ? code_convert_string_norecord (str, Vw32_system_coding_system, 0) \ | |
601 | : str) | |
602 | #endif | |
603 | ||
4ed46869 | 604 | /* Extern declarations. */ |
c04809fb | 605 | extern int decode_coding P_ ((struct coding_system *, unsigned char *, |
658cc252 | 606 | unsigned char *, int, int)); |
c04809fb | 607 | extern int encode_coding P_ ((struct coding_system *, unsigned char *, |
658cc252 | 608 | unsigned char *, int, int)); |
279d9f7b KH |
609 | extern void coding_save_composition P_ ((struct coding_system *, int, int, |
610 | Lisp_Object)); | |
611 | extern void coding_free_composition_data P_ ((struct coding_system *)); | |
612 | extern void coding_adjust_composition_offset P_ ((struct coding_system *, | |
613 | int)); | |
55fff3f9 KH |
614 | extern void coding_allocate_composition_data P_ ((struct coding_system *, |
615 | int)); | |
616 | extern void coding_restore_composition P_ ((struct coding_system *, | |
617 | Lisp_Object)); | |
ec5d8db7 AS |
618 | extern int code_convert_region P_ ((int, int, int, int, struct coding_system *, |
619 | int, int)); | |
c04809fb AS |
620 | extern int decoding_buffer_size P_ ((struct coding_system *, int)); |
621 | extern int encoding_buffer_size P_ ((struct coding_system *, int)); | |
622 | extern void detect_coding P_ ((struct coding_system *, unsigned char *, int)); | |
623 | extern void detect_eol P_ ((struct coding_system *, unsigned char *, int)); | |
c04809fb | 624 | extern int setup_coding_system P_ ((Lisp_Object, struct coding_system *)); |
8000e212 KR |
625 | extern Lisp_Object code_convert_string P_ ((Lisp_Object, |
626 | struct coding_system *, int, int)); | |
eb545596 DL |
627 | extern Lisp_Object code_convert_string_norecord P_ ((Lisp_Object, Lisp_Object, |
628 | int)); | |
e5ff4bc2 | 629 | extern void setup_raw_text_coding_system P_ ((struct coding_system *)); |
52e386c2 KR |
630 | extern Lisp_Object encode_coding_string P_ ((Lisp_Object, |
631 | struct coding_system *, int)); | |
8a6d111e KR |
632 | extern Lisp_Object decode_coding_string P_ ((Lisp_Object, |
633 | struct coding_system *, int)); | |
4ed46869 | 634 | extern Lisp_Object Qcoding_system, Qeol_type, Qcoding_category_index; |
64abe701 | 635 | extern Lisp_Object Qraw_text, Qemacs_mule; |
4ed46869 KH |
636 | extern Lisp_Object Qbuffer_file_coding_system; |
637 | extern Lisp_Object Vcoding_category_list; | |
638 | ||
f967223b KH |
639 | extern Lisp_Object Qtranslation_table; |
640 | extern Lisp_Object Qtranslation_table_id; | |
ab45712c | 641 | |
20ee919e EZ |
642 | /* Mnemonic strings to indicate each type of end-of-line. */ |
643 | extern Lisp_Object eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac; | |
644 | /* Mnemonic string to indicate type of end-of-line is not yet decided. */ | |
645 | extern Lisp_Object eol_mnemonic_undecided; | |
4ed46869 | 646 | |
4ed46869 KH |
647 | #ifdef emacs |
648 | extern Lisp_Object Qfile_coding_system; | |
649 | extern Lisp_Object Qcall_process, Qcall_process_region, Qprocess_argument; | |
650 | extern Lisp_Object Qstart_process, Qopen_network_stream; | |
651 | ||
68c45bf0 PE |
652 | extern char *emacs_strerror P_ ((int)); |
653 | ||
4ed46869 KH |
654 | /* Coding-system for reading files and receiving data from process. */ |
655 | extern Lisp_Object Vcoding_system_for_read; | |
656 | /* Coding-system for writing files and sending data to process. */ | |
657 | extern Lisp_Object Vcoding_system_for_write; | |
658 | /* Coding-system actually used in the latest I/O. */ | |
659 | extern Lisp_Object Vlast_coding_system_used; | |
68c45bf0 PE |
660 | /* Coding-system to use with system messages (e.g. strerror). */ |
661 | extern Lisp_Object Vlocale_coding_system; | |
4ed46869 | 662 | |
77a9bc9a EZ |
663 | /* If non-zero, process buffer inherits the coding system used to decode |
664 | the subprocess output. */ | |
665 | extern int inherit_process_coding_system; | |
666 | ||
4ed46869 KH |
667 | /* Coding-system to be used for encoding terminal output. This |
668 | structure contains information of a coding-system specified by the | |
669 | function `set-terminal-coding-system'. */ | |
670 | extern struct coding_system terminal_coding; | |
671 | ||
fbaa2ed9 KH |
672 | /* Coding system to be used to encode text for terminal display when |
673 | terminal coding system is nil. */ | |
674 | extern struct coding_system safe_terminal_coding; | |
675 | ||
4ed46869 KH |
676 | /* Coding-system of what is sent from terminal keyboard. This |
677 | structure contains information of a coding-system specified by the | |
678 | function `set-keyboard-coding-system'. */ | |
679 | extern struct coding_system keyboard_coding; | |
680 | ||
0827f88d KH |
681 | /* Default coding system to be used to write a file. */ |
682 | extern struct coding_system default_buffer_file_coding; | |
683 | ||
a5825a24 KH |
684 | /* Default coding systems used for process I/O. */ |
685 | extern Lisp_Object Vdefault_process_coding_system; | |
4ed46869 | 686 | |
658cc252 KH |
687 | /* Function to call to force a user to force select a propert coding |
688 | system. */ | |
689 | extern Lisp_Object Vselect_safe_coding_system_function; | |
690 | ||
31406df1 RS |
691 | /* Coding system for file names, or nil if none. */ |
692 | extern Lisp_Object Vfile_name_coding_system; | |
693 | ||
694 | /* Coding system for file names used only when | |
695 | Vfile_name_coding_system is nil. */ | |
696 | extern Lisp_Object Vdefault_file_name_coding_system; | |
2dfda962 JR |
697 | |
698 | #ifdef WINDOWSNT | |
699 | /* Coding system for w32 system strings, or nil if none. */ | |
700 | extern Lisp_Object Vw32_system_coding_system; | |
701 | #endif | |
4ed46869 KH |
702 | #endif |
703 | ||
6f776e81 | 704 | #endif /* EMACS_CODING_H */ |