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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 KH |
21 | |
22 | #ifndef _CODING_H | |
23 | #define _CODING_H | |
24 | ||
25 | #ifndef _CCL_H | |
26 | #include "../src/ccl.h" | |
27 | #endif | |
28 | ||
0ef69138 | 29 | /*** EMACS' INTERNAL FORMAT (emacs-mule) section ***/ |
4ed46869 KH |
30 | |
31 | /* All code (1-byte) of Emacs' internal format is classified into one | |
32 | of the followings. See also `charset.h'. */ | |
33 | enum emacs_code_class_type | |
34 | { | |
35 | EMACS_control_code, /* Control codes in the range | |
36 | 0x00..0x1F and 0x7F except for the | |
37 | following two codes. */ | |
38 | EMACS_linefeed_code, /* 0x0A (linefeed) to denote | |
39 | end-of-line. */ | |
40 | EMACS_carriage_return_code, /* 0x0D (carriage-return) to be used | |
41 | in selective display mode. */ | |
42 | EMACS_ascii_code, /* ASCII characters. */ | |
43 | EMACS_leading_code_composition, /* Leading code of a composite | |
44 | character. */ | |
45 | EMACS_leading_code_2, /* Base leading code of official | |
46 | TYPE9N character. */ | |
47 | EMACS_leading_code_3, /* Base leading code of private TYPE9N | |
48 | or official TYPE9Nx9N character. */ | |
49 | EMACS_leading_code_4, /* Base leading code of private | |
50 | TYPE9Nx9N character. */ | |
51 | EMACS_invalid_code /* Invalid code, i.e. a base leading | |
52 | code not yet assigned to any | |
53 | charset, or a code of the range | |
54 | 0xA0..0xFF. */ | |
55 | }; | |
56 | ||
57 | extern enum emacs_code_class_type emacs_code_class[256]; | |
58 | ||
59 | /*** ISO2022 section ***/ | |
60 | ||
61 | /* Macros to define code of control characters for ISO2022's functions. */ | |
62 | /* code */ /* function */ | |
63 | #define ISO_CODE_LF 0x0A /* line-feed */ | |
64 | #define ISO_CODE_CR 0x0D /* carriage-return */ | |
65 | #define ISO_CODE_SO 0x0E /* shift-out */ | |
66 | #define ISO_CODE_SI 0x0F /* shift-in */ | |
67 | #define ISO_CODE_SS2_7 0x19 /* single-shift-2 for 7-bit code */ | |
68 | #define ISO_CODE_ESC 0x1B /* escape */ | |
69 | #define ISO_CODE_SS2 0x8E /* single-shift-2 */ | |
70 | #define ISO_CODE_SS3 0x8F /* single-shift-3 */ | |
71 | #define ISO_CODE_CSI 0x9B /* control-sequence-introduce */ | |
72 | ||
73 | /* All code (1-byte) of ISO2022 is classified into one of the | |
74 | followings. */ | |
75 | enum iso_code_class_type | |
76 | { | |
77 | ISO_control_code, /* Control codes in the range | |
78 | 0x00..0x1F, 0x7F, and 0x80..0x9F, | |
79 | except for the following seven | |
80 | codes. */ | |
81 | ISO_carriage_return, /* ISO_CODE_CR (0x0D) */ | |
82 | ISO_shift_out, /* ISO_CODE_SO (0x0E) */ | |
83 | ISO_shift_in, /* ISO_CODE_SI (0x0F) */ | |
84 | ISO_single_shift_2_7, /* ISO_CODE_SS2_7 (0x19) */ | |
85 | ISO_escape, /* ISO_CODE_SO (0x1B) */ | |
86 | ISO_single_shift_2, /* ISO_CODE_SS2 (0x8E) */ | |
87 | ISO_single_shift_3, /* ISO_CODE_SS3 (0x8F) */ | |
88 | ISO_control_sequence_introducer, /* ISO_CODE_CSI (0x9B) */ | |
89 | ISO_0x20_or_0x7F, /* Codes of the values 0x20 or 0x7F. */ | |
90 | ISO_graphic_plane_0, /* Graphic codes in the range 0x21..0x7E. */ | |
91 | ISO_0xA0_or_0xFF, /* Codes of the values 0xA0 or 0xFF. */ | |
92 | ISO_graphic_plane_1 /* Graphic codes in the range 0xA1..0xFE. */ | |
93 | }; | |
94 | ||
95 | /** The macros CODING_FLAG_ISO_XXX defines a flag bit of the `flags' | |
96 | element in the structure `coding_system'. This information is used | |
97 | while encoding a text to ISO2022. **/ | |
98 | ||
99 | /* If set, produce short-form designation sequence (e.g. ESC $ A) | |
100 | instead of long-form sequence (e.g. ESC $ ( A). */ | |
101 | #define CODING_FLAG_ISO_SHORT_FORM 0x0001 | |
102 | ||
103 | /* If set, reset graphic planes and registers at end-of-line to the | |
104 | initial state. */ | |
105 | #define CODING_FLAG_ISO_RESET_AT_EOL 0x0002 | |
106 | ||
107 | /* If set, reset graphic planes and registers before any control | |
108 | characters to the initial state. */ | |
109 | #define CODING_FLAG_ISO_RESET_AT_CNTL 0x0004 | |
110 | ||
111 | /* If set, encode by 7-bit environment. */ | |
112 | #define CODING_FLAG_ISO_SEVEN_BITS 0x0008 | |
113 | ||
114 | /* If set, use locking-shift function. */ | |
115 | #define CODING_FLAG_ISO_LOCKING_SHIFT 0x0010 | |
116 | ||
117 | /* If set, use single-shift function. Overwrite | |
118 | CODING_FLAG_ISO_LOCKING_SHIFT. */ | |
119 | #define CODING_FLAG_ISO_SINGLE_SHIFT 0x0020 | |
120 | ||
121 | /* If set, designate JISX0201-Roman instead of ASCII. */ | |
122 | #define CODING_FLAG_ISO_USE_ROMAN 0x0040 | |
123 | ||
124 | /* If set, designate JISX0208-1978 instead of JISX0208-1983. */ | |
125 | #define CODING_FLAG_ISO_USE_OLDJIS 0x0080 | |
126 | ||
127 | /* If set, do not produce ISO6429's direction specifying sequence. */ | |
128 | #define CODING_FLAG_ISO_NO_DIRECTION 0x0100 | |
129 | ||
8ddb35b2 KH |
130 | /* If set, assume designation states are reset at beginning of line on |
131 | output. */ | |
132 | #define CODING_FLAG_ISO_INIT_AT_BOL 0x0200 | |
133 | ||
134 | /* If set, designation sequence should be placed at beginning of line | |
135 | on output. */ | |
136 | #define CODING_FLAG_ISO_DESIGNATE_AT_BOL 0x0400 | |
137 | ||
1db9ba06 | 138 | /* If set, do not encode unsafe charactes on output. */ |
fbaa2ed9 KH |
139 | #define CODING_FLAG_ISO_SAFE 0x0800 |
140 | ||
c0c69d45 KH |
141 | /* If set, extra latin codes (128..159) are accepted as a valid code |
142 | on input. */ | |
143 | #define CODING_FLAG_ISO_LATIN_EXTRA 0x1000 | |
144 | ||
658cc252 KH |
145 | /* If set, use designation escape sequence. */ |
146 | #define CODING_FLAG_ISO_DESIGNATION 0x10000 | |
147 | ||
fbaa2ed9 KH |
148 | /* A character to be produced on output if encoding of the original |
149 | character is prohibited by CODING_FLAG_ISO_SAFE. */ | |
c0c69d45 | 150 | #define CODING_INHIBIT_CHARACTER_SUBSTITUTION 077 /* 077 == `?' */ |
fbaa2ed9 | 151 | |
4ed46869 KH |
152 | /* Structure of the field `spec.iso2022' in the structure `coding_system'. */ |
153 | struct iso2022_spec | |
154 | { | |
155 | /* The current graphic register invoked to each graphic plane. */ | |
156 | int current_invocation[2]; | |
157 | ||
158 | /* The current charset designated to each graphic register. */ | |
159 | int current_designation[4]; | |
160 | ||
161 | /* A charset initially designated to each graphic register. */ | |
162 | int initial_designation[4]; | |
163 | ||
658cc252 KH |
164 | /* If not -1, it is a graphic register specified in an invalid |
165 | designation sequence. */ | |
166 | int last_invalid_designation_register; | |
167 | ||
4ed46869 | 168 | /* A graphic register to which each charset should be designated. */ |
da30d5b1 | 169 | unsigned char requested_designation[MAX_CHARSET + 1]; |
4ed46869 | 170 | |
1db9ba06 KH |
171 | /* A revision number to be specified for each charset on encoding. |
172 | The value 255 means no revision number for the corresponding | |
173 | charset. */ | |
174 | unsigned char charset_revision_number[MAX_CHARSET + 1]; | |
e6de76f8 | 175 | |
4ed46869 KH |
176 | /* Set to 1 temporarily only when graphic register 2 or 3 is invoked |
177 | by single-shift while encoding. */ | |
178 | int single_shifting; | |
8ddb35b2 KH |
179 | |
180 | /* Set to 1 temporarily only when processing at beginning of line. */ | |
181 | int bol; | |
4ed46869 KH |
182 | }; |
183 | ||
184 | /* Macros to access each field in the structure `spec.iso2022'. */ | |
185 | #define CODING_SPEC_ISO_INVOCATION(coding, plane) \ | |
658cc252 | 186 | (coding)->spec.iso2022.current_invocation[plane] |
4ed46869 | 187 | #define CODING_SPEC_ISO_DESIGNATION(coding, reg) \ |
658cc252 | 188 | (coding)->spec.iso2022.current_designation[reg] |
4ed46869 | 189 | #define CODING_SPEC_ISO_INITIAL_DESIGNATION(coding, reg) \ |
658cc252 | 190 | (coding)->spec.iso2022.initial_designation[reg] |
4ed46869 | 191 | #define CODING_SPEC_ISO_REQUESTED_DESIGNATION(coding, charset) \ |
658cc252 | 192 | (coding)->spec.iso2022.requested_designation[charset] |
1db9ba06 | 193 | #define CODING_SPEC_ISO_REVISION_NUMBER(coding, charset) \ |
658cc252 | 194 | (coding)->spec.iso2022.charset_revision_number[charset] |
4ed46869 | 195 | #define CODING_SPEC_ISO_SINGLE_SHIFTING(coding) \ |
658cc252 | 196 | (coding)->spec.iso2022.single_shifting |
8ddb35b2 | 197 | #define CODING_SPEC_ISO_BOL(coding) \ |
658cc252 | 198 | (coding)->spec.iso2022.bol |
4ed46869 | 199 | |
da30d5b1 KH |
200 | /* A value which may appear in |
201 | coding->spec.iso2022.requested_designation indicating that the | |
202 | corresponding charset does not request any graphic register to be | |
203 | designated. */ | |
204 | #define CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION 4 | |
205 | ||
4ed46869 KH |
206 | /* Return a charset which is currently designated to the graphic plane |
207 | PLANE in the coding-system CODING. */ | |
ceb58510 KH |
208 | #define CODING_SPEC_ISO_PLANE_CHARSET(coding, plane) \ |
209 | ((CODING_SPEC_ISO_INVOCATION (coding, plane) < 0) \ | |
210 | ? -1 \ | |
211 | : CODING_SPEC_ISO_DESIGNATION (coding, \ | |
212 | CODING_SPEC_ISO_INVOCATION (coding, plane))) | |
4ed46869 KH |
213 | |
214 | /*** BIG5 section ***/ | |
215 | ||
216 | /* Macros to denote each type of BIG5 coding system. */ | |
217 | #define CODING_FLAG_BIG5_HKU 0x00 /* BIG5-HKU is one of variants of | |
218 | BIG5 developed by Hong Kong | |
219 | University. */ | |
220 | #define CODING_FLAG_BIG5_ETEN 0x01 /* BIG5_ETen is one of variants | |
221 | of BIG5 developed by the | |
222 | company ETen in Taiwan. */ | |
223 | ||
224 | /*** GENERAL section ***/ | |
225 | ||
226 | /* Types of coding system. */ | |
227 | enum coding_type | |
228 | { | |
229 | coding_type_no_conversion, /* A coding system which requires no | |
230 | conversion for reading and writing | |
231 | including end-of-line format. */ | |
0ef69138 | 232 | coding_type_emacs_mule, /* A coding system used in Emacs' |
4ed46869 KH |
233 | buffer and string. Requires no |
234 | conversion for reading and writing | |
235 | except for end-of-line format. */ | |
0ef69138 | 236 | coding_type_undecided, /* A coding system which requires |
4ed46869 KH |
237 | automatic detection of a real |
238 | coding system. */ | |
239 | coding_type_sjis, /* SJIS coding system for Japanese. */ | |
240 | coding_type_iso2022, /* Any coding system of ISO2022 | |
241 | variants. */ | |
242 | coding_type_big5, /* BIG5 coding system for Chinese. */ | |
e80de6b1 | 243 | coding_type_ccl, /* The coding system of which decoder |
4ed46869 | 244 | and encoder are written in CCL. */ |
e80de6b1 KH |
245 | coding_type_raw_text /* A coding system for a text |
246 | containing ramdom 8-bit code which | |
247 | does not require code conversion | |
248 | except for end-of-line format. */ | |
4ed46869 KH |
249 | }; |
250 | ||
251 | /* Formats of end-of-line. */ | |
252 | #define CODING_EOL_LF 0 /* Line-feed only, same as Emacs' | |
253 | internal format. */ | |
254 | #define CODING_EOL_CRLF 1 /* Sequence of carriage-return and | |
255 | line-feed. */ | |
256 | #define CODING_EOL_CR 2 /* Carriage-return only. */ | |
0ef69138 | 257 | #define CODING_EOL_UNDECIDED 3 /* This value is used to denote the |
4ed46869 | 258 | eol-type is not yet decided. */ |
e80de6b1 KH |
259 | #define CODING_EOL_INCONSISTENT 4 /* This value is used to denote the |
260 | eol-type is not consistent | |
261 | through the file. */ | |
4ed46869 KH |
262 | |
263 | /* Character composition status while encoding/decoding. */ | |
264 | #define COMPOSING_NO 0 /* not composing */ | |
265 | #define COMPOSING_WITH_RULE_HEAD 1 /* 1st char of with-rule composing follow */ | |
266 | #define COMPOSING_NO_RULE_HEAD 2 /* 1st char of no-rule composing follow */ | |
267 | #define COMPOSING_WITH_RULE_TAIL 3 /* Nth char of with-rule composing follow */ | |
268 | #define COMPOSING_NO_RULE_TAIL 4 /* Nth char of no-rule composing follow */ | |
269 | #define COMPOSING_WITH_RULE_RULE 5 /* composition rule follow */ | |
270 | ||
271 | /* 1 iff composing. */ | |
272 | #define COMPOSING_P(composing) (composing) | |
273 | /* 1 iff 1st char of composing element follows. */ | |
274 | #define COMPOSING_HEAD_P(composing) \ | |
275 | ((composing) && (composing) <= COMPOSING_NO_RULE_HEAD) | |
276 | /* 1 iff composing with embeded composition rule. */ | |
277 | #define COMPOSING_WITH_RULE_P(composing) ((composing) & 1) | |
278 | ||
658cc252 KH |
279 | /* Macros used for the member finish_status of the struct |
280 | coding_system. */ | |
281 | #define CODING_FINISH_NORMAL 0 | |
282 | #define CODING_FINISH_INSUFFICIENT_SRC 1 | |
283 | #define CODING_FINISH_INSUFFICIENT_DST 2 | |
284 | #define CODING_FINISH_INCONSISTENT_EOL 3 | |
285 | ||
286 | /* Macros used for the member mode of the struct coding_systme. */ | |
287 | ||
288 | /* If set, recover the original CR or LF of the already decoded text | |
289 | when the decoding routine encounters an inconsistent eol format. */ | |
290 | #define CODING_MODE_INHIBIT_INCONSISTENT_EOL 0x01 | |
291 | ||
292 | /* If set, the decoding/encoding routines treat the current data as | |
293 | the last block of the whole text to be converted, and do | |
294 | appropriate fisishing job. */ | |
295 | #define CODING_MODE_LAST_BLOCK 0x02 | |
296 | ||
297 | /* If set, it means that the current source text is in a buffer which | |
298 | enables selective display. */ | |
299 | #define CODING_MODE_SELECTIVE_DISPLAY 0x04 | |
300 | ||
301 | /* This flag is used by the decoding/encoding routines on the fly. If | |
302 | set, it means that right-to-left text is being processed. */ | |
303 | #define CODING_MODE_DIRECTION 0x08 | |
304 | ||
4ed46869 KH |
305 | struct coding_system |
306 | { | |
307 | /* Type of the coding system. */ | |
308 | enum coding_type type; | |
309 | ||
658cc252 KH |
310 | /* Type of end-of-line format (LF, CRLF, or CR) of the coding system. */ |
311 | int eol_type; | |
312 | ||
a5ee738b | 313 | /* Flag bits of the coding system. The meaning of each bit is common |
658cc252 | 314 | to all types of coding systems. */ |
a5ee738b | 315 | unsigned int common_flags; |
4ed46869 KH |
316 | |
317 | /* Flag bits of the coding system. The meaning of each bit depends | |
318 | on the type of the coding system. */ | |
319 | unsigned int flags; | |
320 | ||
658cc252 KH |
321 | /* Mode bits of the coding system. See the comments of the macros |
322 | CODING_MODE_XXX. */ | |
323 | unsigned int mode; | |
4ed46869 | 324 | |
1db9ba06 | 325 | /* Table of safe character sets for this coding system. If the Nth |
658cc252 | 326 | element is 0, the charset of ID N is not a safe character set. |
1db9ba06 KH |
327 | Such a character set is not encoded when CODING_ISO_FLAG_SAFE is |
328 | set. */ | |
329 | unsigned char safe_charsets[MAX_CHARSET + 1]; | |
330 | ||
4ed46869 KH |
331 | /* Non-zero means that characters are being composed currently while |
332 | decoding or encoding. See macros COMPOSING_XXXX above for the | |
333 | meaing of each non-zero value. */ | |
334 | int composing; | |
335 | ||
4ed46869 KH |
336 | /* Detailed information specific to each type of coding system. */ |
337 | union spec | |
338 | { | |
339 | struct iso2022_spec iso2022; | |
340 | struct ccl_spec ccl; /* Defined in ccl.h. */ | |
341 | } spec; | |
342 | ||
658cc252 KH |
343 | /* Index number of coding category of the coding system. */ |
344 | int category_idx; | |
345 | ||
346 | /* How may heading bytes we can skip for decoding. This member is | |
347 | set by the function detect_coding. The initial value is -1 which | |
348 | means detect_coding has not yet been called. */ | |
349 | int heading_ascii; | |
350 | ||
351 | /* The following members are set by encoding/decoding routine. */ | |
352 | int produced, produced_char, consumed, consumed_char; | |
353 | ||
354 | /* The following members are all Lisp symbols. We don't have to | |
355 | protect them from GC because the current garbage collection | |
356 | doesn't relocate Lisp symbols. But, when it is changed, we must | |
357 | find a way to protect them. */ | |
358 | ||
4ed46869 KH |
359 | /* Backward pointer to the Lisp symbol of the coding system. */ |
360 | Lisp_Object symbol; | |
361 | ||
362 | /* Lisp function (symbol) to be called after decoding to do | |
658cc252 | 363 | additional conversion, or nil. */ |
4ed46869 KH |
364 | Lisp_Object post_read_conversion; |
365 | ||
366 | /* Lisp function (symbol) to be called before encoding to do | |
658cc252 | 367 | additional conversion, or nil. */ |
4ed46869 KH |
368 | Lisp_Object pre_write_conversion; |
369 | ||
e8cafdc1 KH |
370 | /* Character unification tables to look up, or nil. */ |
371 | Lisp_Object character_unification_table_for_decode; | |
372 | Lisp_Object character_unification_table_for_encode; | |
4ed46869 KH |
373 | }; |
374 | ||
a5ee738b KH |
375 | #define CODING_REQUIRE_FLUSHING_MASK 1 |
376 | #define CODING_REQUIRE_DECODING_MASK 2 | |
377 | #define CODING_REQUIRE_ENCODING_MASK 4 | |
378 | #define CODING_REQUIRE_DETECTION_MASK 8 | |
379 | ||
380 | /* Return 1 if the coding system CODING requires specific code to be | |
381 | attached at the tail of converted text. */ | |
382 | #define CODING_REQUIRE_FLUSHING(coding) \ | |
383 | ((coding)->common_flags & CODING_REQUIRE_FLUSHING_MASK) | |
384 | ||
385 | /* Return 1 if the coding system CODING requires code conversion on | |
386 | decoding. */ | |
387 | #define CODING_REQUIRE_DECODING(coding) \ | |
388 | ((coding)->common_flags & CODING_REQUIRE_DECODING_MASK) | |
389 | ||
390 | /* Return 1 if the coding system CODING requires code conversion on | |
391 | encoding. */ | |
392 | #define CODING_REQUIRE_ENCODING(coding) \ | |
393 | ((coding)->common_flags & CODING_REQUIRE_ENCODING_MASK) | |
394 | ||
395 | /* Return 1 if the coding system CODING requires some kind of code | |
396 | detection. */ | |
397 | #define CODING_REQUIRE_DETECTION(coding) \ | |
398 | ((coding)->common_flags & CODING_REQUIRE_DETECTION_MASK) | |
399 | ||
658cc252 KH |
400 | #define CODING_MAY_REQUIRE_DECODING(coding) \ |
401 | ((coding)->common_flags \ | |
402 | & (CODING_REQUIRE_DETECTION_MASK | CODING_REQUIRE_DECODING_MASK)) | |
4ed46869 KH |
403 | |
404 | /* Index for each coding category in `coding_category_table' */ | |
0ef69138 | 405 | #define CODING_CATEGORY_IDX_EMACS_MULE 0 |
4ed46869 KH |
406 | #define CODING_CATEGORY_IDX_SJIS 1 |
407 | #define CODING_CATEGORY_IDX_ISO_7 2 | |
658cc252 KH |
408 | #define CODING_CATEGORY_IDX_ISO_7_TIGHT 3 |
409 | #define CODING_CATEGORY_IDX_ISO_8_1 4 | |
410 | #define CODING_CATEGORY_IDX_ISO_8_2 5 | |
411 | #define CODING_CATEGORY_IDX_ISO_7_ELSE 6 | |
412 | #define CODING_CATEGORY_IDX_ISO_8_ELSE 7 | |
413 | #define CODING_CATEGORY_IDX_BIG5 8 | |
414 | #define CODING_CATEGORY_IDX_RAW_TEXT 9 | |
415 | #define CODING_CATEGORY_IDX_BINARY 10 | |
416 | #define CODING_CATEGORY_IDX_MAX 11 | |
4ed46869 KH |
417 | |
418 | /* Definitions of flag bits returned by the function | |
419 | detect_coding_mask (). */ | |
0ef69138 | 420 | #define CODING_CATEGORY_MASK_EMACS_MULE (1 << CODING_CATEGORY_IDX_EMACS_MULE) |
4ed46869 KH |
421 | #define CODING_CATEGORY_MASK_SJIS (1 << CODING_CATEGORY_IDX_SJIS) |
422 | #define CODING_CATEGORY_MASK_ISO_7 (1 << CODING_CATEGORY_IDX_ISO_7) | |
658cc252 | 423 | #define CODING_CATEGORY_MASK_ISO_7_TIGHT (1 << CODING_CATEGORY_IDX_ISO_7_TIGHT) |
4ed46869 KH |
424 | #define CODING_CATEGORY_MASK_ISO_8_1 (1 << CODING_CATEGORY_IDX_ISO_8_1) |
425 | #define CODING_CATEGORY_MASK_ISO_8_2 (1 << CODING_CATEGORY_IDX_ISO_8_2) | |
a38ede41 KH |
426 | #define CODING_CATEGORY_MASK_ISO_7_ELSE (1 << CODING_CATEGORY_IDX_ISO_7_ELSE) |
427 | #define CODING_CATEGORY_MASK_ISO_8_ELSE (1 << CODING_CATEGORY_IDX_ISO_8_ELSE) | |
4ed46869 | 428 | #define CODING_CATEGORY_MASK_BIG5 (1 << CODING_CATEGORY_IDX_BIG5) |
f1651811 | 429 | #define CODING_CATEGORY_MASK_RAW_TEXT (1 << CODING_CATEGORY_IDX_RAW_TEXT) |
1f312d8a | 430 | #define CODING_CATEGORY_MASK_BINARY (1 << CODING_CATEGORY_IDX_BINARY) |
4ed46869 KH |
431 | |
432 | /* This value is returned if detect_coding_mask () find nothing other | |
433 | than ASCII characters. */ | |
434 | #define CODING_CATEGORY_MASK_ANY \ | |
0ef69138 | 435 | ( CODING_CATEGORY_MASK_EMACS_MULE \ |
4ed46869 KH |
436 | | CODING_CATEGORY_MASK_SJIS \ |
437 | | CODING_CATEGORY_MASK_ISO_7 \ | |
658cc252 | 438 | | CODING_CATEGORY_MASK_ISO_7_TIGHT \ |
4ed46869 KH |
439 | | CODING_CATEGORY_MASK_ISO_8_1 \ |
440 | | CODING_CATEGORY_MASK_ISO_8_2 \ | |
a38ede41 KH |
441 | | CODING_CATEGORY_MASK_ISO_7_ELSE \ |
442 | | CODING_CATEGORY_MASK_ISO_8_ELSE \ | |
4ed46869 KH |
443 | | CODING_CATEGORY_MASK_BIG5) |
444 | ||
658cc252 KH |
445 | #define CODING_CATEGORY_MASK_ISO_7BIT \ |
446 | (CODING_CATEGORY_MASK_ISO_7 | CODING_CATEGORY_MASK_ISO_7_TIGHT) | |
447 | ||
448 | #define CODING_CATEGORY_MASK_ISO_8BIT \ | |
449 | (CODING_CATEGORY_MASK_ISO_8_1 | CODING_CATEGORY_MASK_ISO_8_2) | |
450 | ||
451 | #define CODING_CATEGORY_MASK_ISO_SHIFT \ | |
452 | (CODING_CATEGORY_MASK_ISO_7_ELSE | CODING_CATEGORY_MASK_ISO_8_ELSE) | |
453 | ||
454 | #define CODING_CATEGORY_MASK_ISO \ | |
455 | ( CODING_CATEGORY_MASK_ISO_7BIT \ | |
456 | | CODING_CATEGORY_MASK_ISO_SHIFT \ | |
457 | | CODING_CATEGORY_MASK_ISO_8BIT) | |
458 | ||
4ed46869 KH |
459 | /* Macros to decode or encode a character of JISX0208 in SJIS. S1 and |
460 | S2 are the 1st and 2nd position-codes of JISX0208 in SJIS coding | |
461 | system. C1 and C2 are the 1st and 2nd position codes of Emacs' | |
462 | internal format. */ | |
463 | ||
464 | #define DECODE_SJIS(s1, s2, c1, c2) \ | |
465 | do { \ | |
466 | if (s2 >= 0x9F) \ | |
467 | c1 = s1 * 2 - (s1 >= 0xE0 ? 0x160 : 0xE0), \ | |
468 | c2 = s2 - 0x7E; \ | |
469 | else \ | |
470 | c1 = s1 * 2 - ((s1 >= 0xE0) ? 0x161 : 0xE1), \ | |
471 | c2 = s2 - ((s2 >= 0x7F) ? 0x20 : 0x1F); \ | |
472 | } while (0) | |
473 | ||
474 | #define ENCODE_SJIS(c1, c2, s1, s2) \ | |
475 | do { \ | |
476 | if (c1 & 1) \ | |
477 | s1 = c1 / 2 + ((c1 < 0x5F) ? 0x71 : 0xB1), \ | |
478 | s2 = c2 + ((c2 >= 0x60) ? 0x20 : 0x1F); \ | |
479 | else \ | |
480 | s1 = c1 / 2 + ((c1 < 0x5F) ? 0x70 : 0xB0), \ | |
481 | s2 = c2 + 0x7E; \ | |
482 | } while (0) | |
483 | ||
484 | /* Extern declarations. */ | |
c04809fb | 485 | extern int decode_coding P_ ((struct coding_system *, unsigned char *, |
658cc252 | 486 | unsigned char *, int, int)); |
c04809fb | 487 | extern int encode_coding P_ ((struct coding_system *, unsigned char *, |
658cc252 | 488 | unsigned char *, int, int)); |
c04809fb AS |
489 | extern int decoding_buffer_size P_ ((struct coding_system *, int)); |
490 | extern int encoding_buffer_size P_ ((struct coding_system *, int)); | |
491 | extern void detect_coding P_ ((struct coding_system *, unsigned char *, int)); | |
492 | extern void detect_eol P_ ((struct coding_system *, unsigned char *, int)); | |
4ed46869 | 493 | extern int conversion_buffer_size; |
c04809fb AS |
494 | extern char *conversion_buffer; |
495 | extern char *get_conversion_buffer P_ ((int)); | |
496 | extern int setup_coding_system P_ ((Lisp_Object, struct coding_system *)); | |
4ed46869 | 497 | extern Lisp_Object Qcoding_system, Qeol_type, Qcoding_category_index; |
658cc252 | 498 | extern Lisp_Object Qraw_text; |
4ed46869 KH |
499 | extern Lisp_Object Qbuffer_file_coding_system; |
500 | extern Lisp_Object Vcoding_category_list; | |
501 | ||
502 | /* Mnemonic character to indicate each type of end-of-line. */ | |
503 | extern int eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac; | |
504 | /* Mnemonic character to indicate type of end-of-line is not yet decided. */ | |
505 | extern int eol_mnemonic_undecided; | |
506 | ||
4ed46869 KH |
507 | #ifdef emacs |
508 | extern Lisp_Object Qfile_coding_system; | |
509 | extern Lisp_Object Qcall_process, Qcall_process_region, Qprocess_argument; | |
510 | extern Lisp_Object Qstart_process, Qopen_network_stream; | |
511 | ||
512 | /* Coding-system for reading files and receiving data from process. */ | |
513 | extern Lisp_Object Vcoding_system_for_read; | |
514 | /* Coding-system for writing files and sending data to process. */ | |
515 | extern Lisp_Object Vcoding_system_for_write; | |
516 | /* Coding-system actually used in the latest I/O. */ | |
517 | extern Lisp_Object Vlast_coding_system_used; | |
518 | ||
519 | /* Coding-system to be used for encoding terminal output. This | |
520 | structure contains information of a coding-system specified by the | |
521 | function `set-terminal-coding-system'. */ | |
522 | extern struct coding_system terminal_coding; | |
523 | ||
fbaa2ed9 KH |
524 | /* Coding system to be used to encode text for terminal display when |
525 | terminal coding system is nil. */ | |
526 | extern struct coding_system safe_terminal_coding; | |
527 | ||
4ed46869 KH |
528 | /* Coding-system of what is sent from terminal keyboard. This |
529 | structure contains information of a coding-system specified by the | |
530 | function `set-keyboard-coding-system'. */ | |
531 | extern struct coding_system keyboard_coding; | |
532 | ||
a5825a24 KH |
533 | /* Default coding systems used for process I/O. */ |
534 | extern Lisp_Object Vdefault_process_coding_system; | |
4ed46869 | 535 | |
658cc252 KH |
536 | /* Function to call to force a user to force select a propert coding |
537 | system. */ | |
538 | extern Lisp_Object Vselect_safe_coding_system_function; | |
539 | ||
4ed46869 KH |
540 | #endif |
541 | ||
542 | #endif /* _CODING_H */ |