1 /* Header for code conversion stuff
2 Copyright (C) 1991, 1995 Free Software Foundation, Inc.
3 Copyright (C) 1995 Sun Microsystems, Inc.
4 Copyright (C) 1999,2000,2002,2005,2012 MORIOKA Tomohiko
6 This file is part of XEmacs.
8 XEmacs is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 2, or (at your option) any
13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with XEmacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* Synched up with: Mule 2.3. Not in FSF. */
25 /* 91.10.09 written by K.Handa <handa@etl.go.jp> */
26 /* Rewritten by Ben Wing <ben@xemacs.org>. */
28 #ifndef INCLUDED_file_coding_h_
29 #define INCLUDED_file_coding_h_
31 struct decoding_stream;
32 struct encoding_stream;
34 /* Coding system types. These go into the TYPE field of a
35 Lisp_Coding_System. */
37 enum coding_system_type
39 CODESYS_AUTODETECT, /* Automatic conversion. */
41 CODESYS_SHIFT_JIS, /* Shift-JIS; Hankaku (half-width) KANA
43 CODESYS_ISO2022, /* Any ISO2022-compliant coding system.
44 Includes JIS, EUC, CTEXT */
45 CODESYS_BIG5, /* BIG5 (used for Taiwanese). */
46 CODESYS_UCS4, /* ISO 10646 UCS-4 */
47 CODESYS_UTF8, /* ISO 10646 UTF-8 */
49 CODESYS_UTF16, /* ISO 10646 UTF-16 */
51 CODESYS_CCL, /* Converter written in CCL. */
53 CODESYS_NO_CONVERSION /* "No conversion"; used for binary files.
54 We use quotes because there really
55 is some conversion being applied,
56 but it appears to the user as if
57 the text is read in without conversion. */
59 ,CODESYS_INTERNAL /* Raw (internally-formatted) data. */
70 typedef enum eol_type eol_type_t;
73 typedef struct charset_conversion_spec charset_conversion_spec;
74 struct charset_conversion_spec
76 Lisp_Object from_charset;
77 Lisp_Object to_charset;
82 Dynarr_declare (charset_conversion_spec);
83 } charset_conversion_spec_dynarr;
86 struct Lisp_Coding_System
88 struct lcrecord_header header;
90 /* Name and doc string of this coding system. */
92 Lisp_Object doc_string;
94 /* This is the major type of the coding system -- one of Big5, ISO2022,
95 Shift-JIS, etc. See the constants above. */
96 enum coding_system_type type;
98 /* Mnemonic string displayed in the modeline when this coding
99 system is active for a particular buffer. */
100 Lisp_Object mnemonic;
102 Lisp_Object post_read_conversion;
103 Lisp_Object pre_write_conversion;
107 /* Subsidiary coding systems that specify a particular type of EOL
108 marking, rather than autodetecting it. These will only be non-nil
109 if (eol_type == EOL_AUTODETECT). */
111 Lisp_Object eol_crlf;
116 /* What are the charsets to be initially designated to G0, G1,
117 G2, G3? If t, no charset is initially designated. If nil,
118 no charset is initially designated and no charset is allowed
120 Lisp_Object initial_charset[4];
122 /* If true, a designation escape sequence needs to be sent on output
123 for the charset in G[0-3] before that charset is used. */
124 unsigned char force_charset_on_output[4];
126 charset_conversion_spec_dynarr *input_conv;
127 charset_conversion_spec_dynarr *output_conv;
129 unsigned int shoort :1; /* C makes you speak Dutch */
130 unsigned int no_ascii_eol :1;
131 unsigned int no_ascii_cntl :1;
132 unsigned int seven :1;
133 unsigned int lock_shift :1;
134 unsigned int no_iso6429 :1;
135 unsigned int escape_quoted :1;
139 /* For a CCL coding system, these specify the CCL programs used for
140 decoding (input) and encoding (output). */
146 unsigned int disable_composition :1;
147 unsigned int enable_decomposition :1;
148 unsigned int use_entity_reference :1;
149 Lisp_Object ccs_priority_list;
152 typedef struct Lisp_Coding_System Lisp_Coding_System;
154 DECLARE_LRECORD (coding_system, Lisp_Coding_System);
155 #define XCODING_SYSTEM(x) XRECORD (x, coding_system, Lisp_Coding_System)
156 #define XSETCODING_SYSTEM(x, p) XSETRECORD (x, p, coding_system)
157 #define CODING_SYSTEMP(x) RECORDP (x, coding_system)
158 #define CHECK_CODING_SYSTEM(x) CHECK_RECORD (x, coding_system)
159 #define CONCHECK_CODING_SYSTEM(x) CONCHECK_RECORD (x, coding_system)
161 #define CODING_SYSTEM_NAME(codesys) ((codesys)->name)
162 #define CODING_SYSTEM_DOC_STRING(codesys) ((codesys)->doc_string)
163 #define CODING_SYSTEM_TYPE(codesys) ((codesys)->type)
164 #define CODING_SYSTEM_MNEMONIC(codesys) ((codesys)->mnemonic)
165 #define CODING_SYSTEM_POST_READ_CONVERSION(codesys) \
166 ((codesys)->post_read_conversion)
167 #define CODING_SYSTEM_PRE_WRITE_CONVERSION(codesys) \
168 ((codesys)->pre_write_conversion)
169 #define CODING_SYSTEM_EOL_TYPE(codesys) ((codesys)->eol_type)
170 #define CODING_SYSTEM_EOL_LF(codesys) ((codesys)->eol_lf)
171 #define CODING_SYSTEM_EOL_CRLF(codesys) ((codesys)->eol_crlf)
172 #define CODING_SYSTEM_EOL_CR(codesys) ((codesys)->eol_cr)
175 #define CODING_SYSTEM_ISO2022_INITIAL_CHARSET(codesys, g) \
176 ((codesys)->iso2022.initial_charset[g])
177 #define CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT(codesys, g) \
178 ((codesys)->iso2022.force_charset_on_output[g])
179 #define CODING_SYSTEM_ISO2022_SHORT(codesys) ((codesys)->iso2022.shoort)
180 #define CODING_SYSTEM_ISO2022_NO_ASCII_EOL(codesys) \
181 ((codesys)->iso2022.no_ascii_eol)
182 #define CODING_SYSTEM_ISO2022_NO_ASCII_CNTL(codesys) \
183 ((codesys)->iso2022.no_ascii_cntl)
184 #define CODING_SYSTEM_ISO2022_SEVEN(codesys) ((codesys)->iso2022.seven)
185 #define CODING_SYSTEM_ISO2022_LOCK_SHIFT(codesys) \
186 ((codesys)->iso2022.lock_shift)
187 #define CODING_SYSTEM_ISO2022_NO_ISO6429(codesys) \
188 ((codesys)->iso2022.no_iso6429)
189 #define CODING_SYSTEM_ISO2022_ESCAPE_QUOTED(codesys) \
190 ((codesys)->iso2022.escape_quoted)
191 #define CODING_SYSTEM_CCL_DECODE(codesys) ((codesys)->ccl.decode)
192 #define CODING_SYSTEM_CCL_ENCODE(codesys) ((codesys)->ccl.encode)
195 #define CODING_SYSTEM_DISABLE_COMPOSITION(codesys) \
196 ((codesys)->disable_composition)
197 #define CODING_SYSTEM_ENABLE_DECOMPOSITION(codesys) \
198 ((codesys)->enable_decomposition)
199 #define CODING_SYSTEM_USE_ENTITY_REFERENCE(codesys) \
200 ((codesys)->use_entity_reference)
201 #define CODING_SYSTEM_CCS_PRIORITY_LIST(codesys) \
202 ((codesys)->ccs_priority_list)
205 #define XCODING_SYSTEM_NAME(codesys) \
206 CODING_SYSTEM_NAME (XCODING_SYSTEM (codesys))
207 #define XCODING_SYSTEM_DOC_STRING(codesys) \
208 CODING_SYSTEM_DOC_STRING (XCODING_SYSTEM (codesys))
209 #define XCODING_SYSTEM_TYPE(codesys) \
210 CODING_SYSTEM_TYPE (XCODING_SYSTEM (codesys))
211 #define XCODING_SYSTEM_MNEMONIC(codesys) \
212 CODING_SYSTEM_MNEMONIC (XCODING_SYSTEM (codesys))
213 #define XCODING_SYSTEM_POST_READ_CONVERSION(codesys) \
214 CODING_SYSTEM_POST_READ_CONVERSION (XCODING_SYSTEM (codesys))
215 #define XCODING_SYSTEM_PRE_WRITE_CONVERSION(codesys) \
216 CODING_SYSTEM_PRE_WRITE_CONVERSION (XCODING_SYSTEM (codesys))
217 #define XCODING_SYSTEM_EOL_TYPE(codesys) \
218 CODING_SYSTEM_EOL_TYPE (XCODING_SYSTEM (codesys))
219 #define XCODING_SYSTEM_EOL_LF(codesys) \
220 CODING_SYSTEM_EOL_LF (XCODING_SYSTEM (codesys))
221 #define XCODING_SYSTEM_EOL_CRLF(codesys) \
222 CODING_SYSTEM_EOL_CRLF (XCODING_SYSTEM (codesys))
223 #define XCODING_SYSTEM_EOL_CR(codesys) \
224 CODING_SYSTEM_EOL_CR (XCODING_SYSTEM (codesys))
227 #define XCODING_SYSTEM_ISO2022_INITIAL_CHARSET(codesys, g) \
228 CODING_SYSTEM_ISO2022_INITIAL_CHARSET (XCODING_SYSTEM (codesys), g)
229 #define XCODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT(codesys, g) \
230 CODING_SYSTEM_ISO2022_FORCE_CHARSET_ON_OUTPUT (XCODING_SYSTEM (codesys), g)
231 #define XCODING_SYSTEM_ISO2022_SHORT(codesys) \
232 CODING_SYSTEM_ISO2022_SHORT (XCODING_SYSTEM (codesys))
233 #define XCODING_SYSTEM_ISO2022_NO_ASCII_EOL(codesys) \
234 CODING_SYSTEM_ISO2022_NO_ASCII_EOL (XCODING_SYSTEM (codesys))
235 #define XCODING_SYSTEM_ISO2022_NO_ASCII_CNTL(codesys) \
236 CODING_SYSTEM_ISO2022_NO_ASCII_CNTL (XCODING_SYSTEM (codesys))
237 #define XCODING_SYSTEM_ISO2022_SEVEN(codesys) \
238 CODING_SYSTEM_ISO2022_SEVEN (XCODING_SYSTEM (codesys))
239 #define XCODING_SYSTEM_ISO2022_LOCK_SHIFT(codesys) \
240 CODING_SYSTEM_ISO2022_LOCK_SHIFT (XCODING_SYSTEM (codesys))
241 #define XCODING_SYSTEM_ISO2022_NO_ISO6429(codesys) \
242 CODING_SYSTEM_ISO2022_NO_ISO6429 (XCODING_SYSTEM (codesys))
243 #define XCODING_SYSTEM_ISO2022_ESCAPE_QUOTED(codesys) \
244 CODING_SYSTEM_ISO2022_ESCAPE_QUOTED (XCODING_SYSTEM (codesys))
245 #define XCODING_SYSTEM_CCL_DECODE(codesys) \
246 CODING_SYSTEM_CCL_DECODE (XCODING_SYSTEM (codesys))
247 #define XCODING_SYSTEM_CCL_ENCODE(codesys) \
248 CODING_SYSTEM_CCL_ENCODE (XCODING_SYSTEM (codesys))
251 #define XCODING_SYSTEM_DISABLE_COMPOSITION(codesys) \
252 CODING_SYSTEM_DISABLE_COMPOSITION (XCODING_SYSTEM (codesys))
253 #define XCODING_SYSTEM_ENABLE_DECOMPOSITION(codesys) \
254 CODING_SYSTEM_ENABLE_DECOMPOSITION (XCODING_SYSTEM (codesys))
255 #define XCODING_SYSTEM_USE_ENTITY_REFERENCE(codesys) \
256 CODING_SYSTEM_USE_ENTITY_REFERENCE (XCODING_SYSTEM (codesys))
257 #define XCODING_SYSTEM_CCS_PRIORITY_LIST(codesys) \
258 CODING_SYSTEM_CCS_PRIORITY_LIST (XCODING_SYSTEM (codesys))
261 EXFUN (Fcoding_category_list, 0);
262 EXFUN (Fcoding_category_system, 1);
263 EXFUN (Fcoding_priority_list, 0);
264 EXFUN (Fcoding_system_charset, 2);
265 EXFUN (Fcoding_system_doc_string, 1);
266 EXFUN (Fcoding_system_list, 0);
267 EXFUN (Fcoding_system_name, 1);
268 EXFUN (Fcoding_system_p, 1);
269 EXFUN (Fcoding_system_property, 2);
270 EXFUN (Fcoding_system_type, 1);
271 EXFUN (Fcopy_coding_system, 2);
272 EXFUN (Fdecode_big5_char, 1);
273 EXFUN (Fdecode_coding_region, 4);
274 EXFUN (Fdecode_shift_jis_char, 1);
275 EXFUN (Fdetect_coding_region, 3);
276 EXFUN (Fencode_big5_char, 1);
277 EXFUN (Fencode_coding_region, 4);
278 EXFUN (Fencode_shift_jis_char, 1);
279 EXFUN (Ffind_coding_system, 1);
280 EXFUN (Fget_coding_system, 1);
281 EXFUN (Fmake_coding_system, 4);
282 EXFUN (Fset_coding_category_system, 2);
283 EXFUN (Fset_coding_priority_list, 1);
284 EXFUN (Fsubsidiary_coding_system, 2);
286 extern Lisp_Object Qucs4, Qutf8;
287 extern Lisp_Object Qbig5, Qccl, Qcharset_g0;
288 extern Lisp_Object Qcharset_g1, Qcharset_g2, Qcharset_g3, Qcoding_system_error;
289 extern Lisp_Object Qcoding_systemp, Qcr, Qcrlf, Qdecode, Qencode;
290 extern Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf, Qeol_type, Qescape_quoted;
291 extern Lisp_Object Qforce_g0_on_output, Qforce_g1_on_output;
292 extern Lisp_Object Qforce_g2_on_output, Qforce_g3_on_output;
293 extern Lisp_Object Qinput_charset_conversion, Qiso2022, Qlf, Qlock_shift;
294 extern Lisp_Object Qmnemonic, Qno_ascii_cntl, Qno_ascii_eol, Qno_conversion;
295 extern Lisp_Object Qraw_text;
296 extern Lisp_Object Qno_iso6429, Qoutput_charset_conversion;
297 extern Lisp_Object Qpost_read_conversion, Qpre_write_conversion, Qseven;
298 extern Lisp_Object Qshift_jis, Qshort, Vcoding_system_for_read;
299 extern Lisp_Object Vcoding_system_for_write, Vcoding_system_hash_table;
300 extern Lisp_Object Vfile_name_coding_system, Vkeyboard_coding_system;
301 extern Lisp_Object Vterminal_coding_system;
303 /* Flags indicating current state while converting code. */
305 /* Used by everyone. */
307 #define CODING_STATE_END (1 << 0) /* If set, this is the last chunk of
308 data being processed. When this
309 is finished, output any necessary
310 terminating control characters,
311 escape sequences, etc. */
312 #define CODING_STATE_CR (1 << 1) /* If set, we just saw a CR. */
315 /* Used by Big 5 on output. */
317 #define CODING_STATE_BIG5_1 (1 << 2) /* If set, we just encountered
318 LEADING_BYTE_BIG5_1. */
319 #define CODING_STATE_BIG5_2 (1 << 3) /* If set, we just encountered
320 LEADING_BYTE_BIG5_2. */
323 /* Used by ISO2022 on input and output. */
325 #define CODING_STATE_R2L (1 << 4) /* If set, the current
326 directionality is right-to-left.
327 Otherwise, it's left-to-right. */
330 /* Used by ISO2022 on input. */
332 #define CODING_STATE_ESCAPE (1 << 5) /* If set, we're currently parsing
333 an escape sequence and the upper
334 16 bits should be looked at to
335 indicate what partial escape
336 sequence we've seen so far.
337 Otherwise, we're running
338 through actual text. */
339 #define CODING_STATE_SS2 (1 << 6) /* If set, G2 is invoked into GL, but
340 only for the next character. */
341 #define CODING_STATE_SS3 (1 << 7) /* If set, G3 is invoked into GL,
342 but only for the next character.
343 If both CODING_STATE_SS2 and
344 CODING_STATE_SS3 are set,
345 CODING_STATE_SS2 overrides; but
346 this probably indicates an error
347 in the text encoding. */
348 #ifdef ENABLE_COMPOSITE_CHARS
349 #define CODING_STATE_COMPOSITE (1 << 8) /* If set, we're currently processing
350 a composite character (i.e. a
351 character constructed by
352 overstriking two or more
354 #endif /* ENABLE_COMPOSITE_CHARS */
357 /* CODING_STATE_ISO2022_LOCK is the mask of flags that remain on until
358 explicitly turned off when in the ISO2022 encoder/decoder. Other flags are
359 turned off at the end of processing each character or escape sequence. */
360 #ifdef ENABLE_COMPOSITE_CHARS
361 # define CODING_STATE_ISO2022_LOCK \
362 (CODING_STATE_END | CODING_STATE_COMPOSITE | CODING_STATE_R2L)
364 # define CODING_STATE_ISO2022_LOCK (CODING_STATE_END | CODING_STATE_R2L)
367 #define CODING_STATE_BIG5_LOCK CODING_STATE_END
369 /* Flags indicating what we've seen so far when parsing an
370 ISO2022 escape sequence. */
373 /* Partial sequences */
374 ISO_ESC_NOTHING, /* Nothing has been seen. */
375 ISO_ESC, /* We've seen ESC. */
376 ISO_ESC_2_4, /* We've seen ESC $. This indicates
377 that we're designating a multi-byte, rather
378 than a single-byte, character set. */
379 ISO_ESC_2_8, /* We've seen ESC 0x28, i.e. ESC (.
380 This means designate a 94-character
381 character set into G0. */
382 ISO_ESC_2_9, /* We've seen ESC 0x29 -- designate a
383 94-character character set into G1. */
384 ISO_ESC_2_10, /* We've seen ESC 0x2A. */
385 ISO_ESC_2_11, /* We've seen ESC 0x2B. */
386 ISO_ESC_2_12, /* We've seen ESC 0x2C -- designate a
387 96-character character set into G0.
388 (This is not ISO2022-standard.
389 The following 96-character
390 control sequences are standard,
392 ISO_ESC_2_13, /* We've seen ESC 0x2D -- designate a
393 96-character character set into G1.
395 ISO_ESC_2_14, /* We've seen ESC 0x2E. */
396 ISO_ESC_2_15, /* We've seen ESC 0x2F. */
397 ISO_ESC_2_4_8, /* We've seen ESC $ 0x28 -- designate
398 a 94^N character set into G0. */
399 ISO_ESC_2_4_9, /* We've seen ESC $ 0x29. */
400 ISO_ESC_2_4_10, /* We've seen ESC $ 0x2A. */
401 ISO_ESC_2_4_11, /* We've seen ESC $ 0x2B. */
402 ISO_ESC_2_4_12, /* We've seen ESC $ 0x2C. */
403 ISO_ESC_2_4_13, /* We've seen ESC $ 0x2D. */
404 ISO_ESC_2_4_14, /* We've seen ESC $ 0x2E. */
405 ISO_ESC_2_4_15, /* We've seen ESC $ 0x2F. */
406 ISO_ESC_5_11, /* We've seen ESC [ or 0x9B. This
407 starts a directionality-control
408 sequence. The next character
409 must be 0, 1, 2, or ]. */
410 ISO_ESC_5_11_0, /* We've seen 0x9B 0. The next character must be ]. */
411 ISO_ESC_5_11_1, /* We've seen 0x9B 1. The next character must be ]. */
412 ISO_ESC_5_11_2, /* We've seen 0x9B 2. The next character must be ]. */
414 /* Full sequences. */
415 #ifdef ENABLE_COMPOSITE_CHARS
416 ISO_ESC_START_COMPOSITE, /* Private usage for START COMPOSING */
417 ISO_ESC_END_COMPOSITE, /* Private usage for END COMPOSING */
418 #endif /* ENABLE_COMPOSITE_CHARS */
419 ISO_ESC_SINGLE_SHIFT, /* We've seen a complete single-shift sequence. */
420 ISO_ESC_LOCKING_SHIFT,/* We've seen a complete locking-shift sequence. */
421 ISO_ESC_DESIGNATE, /* We've seen a complete designation sequence. */
422 ISO_ESC_DIRECTIONALITY,/* We've seen a complete ISO6429 directionality
424 ISO_ESC_LITERAL /* We've seen a literal character ala
428 /* Macros to define code of control characters for ISO2022's functions. */
429 /* code */ /* function */
430 #define ISO_CODE_LF 0x0A /* line-feed */
431 #define ISO_CODE_CR 0x0D /* carriage-return */
432 #define ISO_CODE_SO 0x0E /* shift-out */
433 #define ISO_CODE_SI 0x0F /* shift-in */
434 #define ISO_CODE_ESC 0x1B /* escape */
435 #define ISO_CODE_DEL 0x7F /* delete */
436 #define ISO_CODE_SS2 0x8E /* single-shift-2 */
437 #define ISO_CODE_SS3 0x8F /* single-shift-3 */
438 #define ISO_CODE_CSI 0x9B /* control-sequence-introduce */
441 /* Distinguishable categories of encodings.
443 This list determines the initial priority of the categories.
445 For better or worse, currently Mule files are encoded in 7-bit ISO 2022.
446 For this reason, under Mule ISO_7 gets highest priority.
448 Putting NO_CONVERSION second prevents "binary corruption" in the
449 default case in all but the (presumably) extremely rare case of a
450 binary file which contains redundant escape sequences but no 8-bit
453 The remaining priorities are based on perceived "internationalization
454 political correctness." An exception is UCS-4 at the bottom, since
455 basically everything is compatible with UCS-4, but it is likely to
456 be very rare as an external encoding. */
458 enum coding_category_type
460 /* must be a contiguous range of values 0 -- CODING_CATEGORY_LAST - 1 */
462 CODING_CATEGORY_ISO_7, /* ISO2022 system using only seven-bit bytes,
464 CODING_CATEGORY_NO_CONVERSION,
465 CODING_CATEGORY_UTF8,
466 CODING_CATEGORY_ISO_8_1, /* ISO2022 system using eight-bit bytes,
467 no locking shift, no designation sequences,
468 one-dimension characters in the upper half. */
469 CODING_CATEGORY_ISO_8_2, /* ISO2022 system using eight-bit bytes,
470 no locking shift, no designation sequences,
471 two-dimension characters in the upper half. */
472 CODING_CATEGORY_ISO_8_DESIGNATE, /* ISO2022 system using eight-bit bytes,
473 no locking shift, no single shift,
474 using designation to switch charsets */
475 CODING_CATEGORY_ISO_LOCK_SHIFT, /* ISO2022 system using locking shift */
476 CODING_CATEGORY_SHIFT_JIS,
477 CODING_CATEGORY_BIG5,
478 CODING_CATEGORY_UTF16,
479 CODING_CATEGORY_UCS4,
481 CODING_CATEGORY_NO_CONVERSION,
483 CODING_CATEGORY_LAST /* not a real coding category */
487 #define CODING_CATEGORY_SHIFT_JIS_MASK \
488 (1 << CODING_CATEGORY_SHIFT_JIS)
489 #define CODING_CATEGORY_ISO_7_MASK \
490 (1 << CODING_CATEGORY_ISO_7)
491 #define CODING_CATEGORY_ISO_8_DESIGNATE_MASK \
492 (1 << CODING_CATEGORY_ISO_8_DESIGNATE)
493 #define CODING_CATEGORY_ISO_8_1_MASK \
494 (1 << CODING_CATEGORY_ISO_8_1)
495 #define CODING_CATEGORY_ISO_8_2_MASK \
496 (1 << CODING_CATEGORY_ISO_8_2)
497 #define CODING_CATEGORY_ISO_LOCK_SHIFT_MASK \
498 (1 << CODING_CATEGORY_ISO_LOCK_SHIFT)
499 #define CODING_CATEGORY_BIG5_MASK \
500 (1 << CODING_CATEGORY_BIG5)
501 #define CODING_CATEGORY_UCS4_MASK \
502 (1 << CODING_CATEGORY_UCS4)
503 #define CODING_CATEGORY_UTF16_MASK \
504 (1 << CODING_CATEGORY_UTF16)
505 #define CODING_CATEGORY_UTF8_MASK \
506 (1 << CODING_CATEGORY_UTF8)
508 #define CODING_CATEGORY_NO_CONVERSION_MASK \
509 (1 << CODING_CATEGORY_NO_CONVERSION)
510 #define CODING_CATEGORY_NOT_FINISHED_MASK \
514 /* Convert shift-JIS code (sj1, sj2) into internal string
515 representation (c1, c2). (The leading byte is assumed.) */
517 #define DECODE_SJIS(sj1, sj2, c1, c2) \
519 int I1 = sj1, I2 = sj2; \
521 c1 = (I1 << 1) - ((I1 >= 0xe0) ? 0xe0 : 0x60), \
524 c1 = (I1 << 1) - ((I1 >= 0xe0) ? 0xe1 : 0x61), \
525 c2 = I2 + ((I2 >= 0x7f) ? 0x60 : 0x61); \
528 /* Convert the internal string representation of a Shift-JIS character
529 (c1, c2) into Shift-JIS code (sj1, sj2). The leading byte is
532 #define ENCODE_SJIS(c1, c2, sj1, sj2) \
534 int I1 = c1, I2 = c2; \
536 sj1 = (I1 >> 1) + ((I1 < 0xdf) ? 0x31 : 0x71), \
537 sj2 = I2 - ((I2 >= 0xe0) ? 0x60 : 0x61); \
539 sj1 = (I1 >> 1) + ((I1 < 0xdf) ? 0x30 : 0x70), \
544 Lisp_Object make_decoding_input_stream (Lstream *stream,
545 Lisp_Object codesys);
546 Lisp_Object make_encoding_input_stream (Lstream *stream,
547 Lisp_Object codesys);
548 Lisp_Object make_decoding_output_stream (Lstream *stream,
549 Lisp_Object codesys);
550 Lisp_Object make_encoding_output_stream (Lstream *stream,
551 Lisp_Object codesys);
552 Lisp_Object decoding_stream_coding_system (Lstream *stream);
553 Lisp_Object encoding_stream_coding_system (Lstream *stream);
554 void set_decoding_stream_coding_system (Lstream *stream,
555 Lisp_Object codesys);
556 void set_encoding_stream_coding_system (Lstream *stream,
557 Lisp_Object codesys);
558 void determine_real_coding_system (Lstream *stream, Lisp_Object *codesys_in_out,
559 eol_type_t *eol_type_in_out);
563 #define MIN_LEADING_BYTE 0x80
564 /* These need special treatment in a string and/or character */
565 #ifdef ENABLE_COMPOSITE_CHARS
566 #define LEADING_BYTE_COMPOSITE 0x80 /* for a composite character */
568 #define LEADING_BYTE_CONTROL_1 0x8F /* represent normal 80-9F */
569 #define LEADING_BYTE_LATIN_ISO8859_1 0x81 /* Right half of ISO 8859-1 */
570 #define BYTE_C1_P(c) ((unsigned int) ((unsigned int) (c) - 0x80) < 0x20)
571 #define BUFBYTE_FIRST_BYTE_P(c) ((c) < 0xA0)
572 #define BUFBYTE_LEADING_BYTE_P(c) BYTE_C1_P (c)
573 #endif /* not MULE */
575 #endif /* INCLUDED_file_coding_h_ */