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Remove P_ and __P macros.
[gnu-emacs] / src / character.h
1 /* Header for multibyte character handler.
2 Copyright (C) 1995, 1997, 1998 Electrotechnical Laboratory, JAPAN.
3 Licensed to the Free Software Foundation.
4 Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 National Institute of Advanced Industrial Science and Technology (AIST)
6 Registration Number H13PRO009
7
8 This file is part of GNU Emacs.
9
10 GNU Emacs is free software: you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation, either version 3 of the License, or
13 (at your option) any later version.
14
15 GNU Emacs is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
22
23 #ifndef EMACS_CHARACTER_H
24 #define EMACS_CHARACTER_H
25
26 /* character code 1st byte byte sequence
27 -------------- -------- -------------
28 0-7F 00..7F 0xxxxxxx
29 80-7FF C2..DF 110xxxxx 10xxxxxx
30 800-FFFF E0..EF 1110xxxx 10xxxxxx 10xxxxxx
31 10000-1FFFFF F0..F7 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
32 200000-3FFF7F F8 11111000 1000xxxx 10xxxxxx 10xxxxxx 10xxxxxx
33 3FFF80-3FFFFF C0..C1 1100000x 10xxxxxx (for eight-bit-char)
34 400000-... invalid
35
36 invalid 1st byte 80..BF 10xxxxxx
37 F9..FF 11111xxx (xxx != 000)
38 */
39
40 /* Maximum character code ((1 << CHARACTERBITS) - 1). */
41 #define MAX_CHAR 0x3FFFFF
42
43 /* Maximum Unicode character code. */
44 #define MAX_UNICODE_CHAR 0x10FFFF
45
46 /* Maximum N-byte character codes. */
47 #define MAX_1_BYTE_CHAR 0x7F
48 #define MAX_2_BYTE_CHAR 0x7FF
49 #define MAX_3_BYTE_CHAR 0xFFFF
50 #define MAX_4_BYTE_CHAR 0x1FFFFF
51 #define MAX_5_BYTE_CHAR 0x3FFF7F
52
53 /* Minimum leading code of multibyte characters. */
54 #define MIN_MULTIBYTE_LEADING_CODE 0xC0
55 /* Maximum leading code of multibyte characters. */
56 #define MAX_MULTIBYTE_LEADING_CODE 0xF8
57
58 /* Nonzero iff C is a character that corresponds to a raw 8-bit
59 byte. */
60 #define CHAR_BYTE8_P(c) ((c) > MAX_5_BYTE_CHAR)
61
62 /* Return the character code for raw 8-bit byte BYTE. */
63 #define BYTE8_TO_CHAR(byte) ((byte) + 0x3FFF00)
64
65 #define UNIBYTE_TO_CHAR(byte) \
66 (ASCII_BYTE_P (byte) ? (byte) : BYTE8_TO_CHAR (byte))
67
68 /* Return the raw 8-bit byte for character C. */
69 #define CHAR_TO_BYTE8(c) \
70 (CHAR_BYTE8_P (c) \
71 ? (c) - 0x3FFF00 \
72 : multibyte_char_to_unibyte (c, Qnil))
73
74 /* Return the raw 8-bit byte for character C,
75 or -1 if C doesn't correspond to a byte. */
76 #define CHAR_TO_BYTE_SAFE(c) \
77 (CHAR_BYTE8_P (c) \
78 ? (c) - 0x3FFF00 \
79 : multibyte_char_to_unibyte_safe (c))
80
81 /* Nonzero iff BYTE is the 1st byte of a multibyte form of a character
82 that corresponds to a raw 8-bit byte. */
83 #define CHAR_BYTE8_HEAD_P(byte) ((byte) == 0xC0 || (byte) == 0xC1)
84
85 /* If C is not ASCII, make it unibyte. */
86 #define MAKE_CHAR_UNIBYTE(c) \
87 do { \
88 if (! ASCII_CHAR_P (c)) \
89 c = CHAR_TO_BYTE8 (c); \
90 } while (0)
91
92
93 /* If C is not ASCII, make it multibyte. Assumes C < 256. */
94 #define MAKE_CHAR_MULTIBYTE(c) \
95 (eassert ((c) >= 0 && (c) < 256), (c) = UNIBYTE_TO_CHAR (c))
96
97 /* This is the maximum byte length of multibyte form. */
98 #define MAX_MULTIBYTE_LENGTH 5
99
100 /* Return a Lisp character whose character code is C. Assumes C is
101 a valid character code. */
102 #define make_char(c) make_number (c)
103
104 /* Nonzero iff C is an ASCII byte. */
105 #define ASCII_BYTE_P(c) ((unsigned) (c) < 0x80)
106
107 /* Nonzero iff X is a character. */
108 #define CHARACTERP(x) (NATNUMP (x) && XFASTINT (x) <= MAX_CHAR)
109
110 /* Nonzero iff C is valid as a character code. GENERICP is not used. */
111 #define CHAR_VALID_P(c, genericp) ((unsigned) (c) <= MAX_CHAR)
112
113 /* Check if Lisp object X is a character or not. */
114 #define CHECK_CHARACTER(x) \
115 CHECK_TYPE (CHARACTERP (x), Qcharacterp, x)
116
117 #define CHECK_CHARACTER_CAR(x) \
118 do { \
119 Lisp_Object tmp = XCAR (x); \
120 CHECK_CHARACTER (tmp); \
121 XSETCAR ((x), tmp); \
122 } while (0)
123
124 #define CHECK_CHARACTER_CDR(x) \
125 do { \
126 Lisp_Object tmp = XCDR (x); \
127 CHECK_CHARACTER (tmp); \
128 XSETCDR ((x), tmp); \
129 } while (0)
130
131 /* Nonzero iff C is an ASCII character. */
132 #define ASCII_CHAR_P(c) ((unsigned) (c) < 0x80)
133
134 /* Nonzero iff C is a character of code less than 0x100. */
135 #define SINGLE_BYTE_CHAR_P(c) ((unsigned) (c) < 0x100)
136
137 /* Nonzero if character C has a printable glyph. */
138 #define CHAR_PRINTABLE_P(c) \
139 (((c) >= 32 && (c) < 127) \
140 || ! NILP (CHAR_TABLE_REF (Vprintable_chars, (c))))
141
142 /* Return byte length of multibyte form for character C. */
143 #define CHAR_BYTES(c) \
144 ( (c) <= MAX_1_BYTE_CHAR ? 1 \
145 : (c) <= MAX_2_BYTE_CHAR ? 2 \
146 : (c) <= MAX_3_BYTE_CHAR ? 3 \
147 : (c) <= MAX_4_BYTE_CHAR ? 4 \
148 : (c) <= MAX_5_BYTE_CHAR ? 5 \
149 : 2)
150
151
152 /* Return the leading code of multibyte form of C. */
153 #define CHAR_LEADING_CODE(c) \
154 ((c) <= MAX_1_BYTE_CHAR ? c \
155 : (c) <= MAX_2_BYTE_CHAR ? (0xC0 | ((c) >> 6)) \
156 : (c) <= MAX_3_BYTE_CHAR ? (0xE0 | ((c) >> 12)) \
157 : (c) <= MAX_4_BYTE_CHAR ? (0xF0 | ((c) >> 18)) \
158 : (c) <= MAX_5_BYTE_CHAR ? 0xF8 \
159 : (0xC0 | (((c) >> 6) & 0x01)))
160
161
162 /* Store multibyte form of the character C in P. The caller should
163 allocate at least MAX_MULTIBYTE_LENGTH bytes area at P in advance.
164 Returns the length of the multibyte form. */
165
166 #define CHAR_STRING(c, p) \
167 ((unsigned) (c) <= MAX_1_BYTE_CHAR \
168 ? ((p)[0] = (c), \
169 1) \
170 : (unsigned) (c) <= MAX_2_BYTE_CHAR \
171 ? ((p)[0] = (0xC0 | ((c) >> 6)), \
172 (p)[1] = (0x80 | ((c) & 0x3F)), \
173 2) \
174 : (unsigned) (c) <= MAX_3_BYTE_CHAR \
175 ? ((p)[0] = (0xE0 | ((c) >> 12)), \
176 (p)[1] = (0x80 | (((c) >> 6) & 0x3F)), \
177 (p)[2] = (0x80 | ((c) & 0x3F)), \
178 3) \
179 : char_string ((unsigned) c, p))
180
181 /* Store multibyte form of byte B in P. The caller should allocate at
182 least MAX_MULTIBYTE_LENGTH bytes area at P in advance. Returns the
183 length of the multibyte form. */
184
185 #define BYTE8_STRING(b, p) \
186 ((p)[0] = (0xC0 | (((b) >> 6) & 0x01)), \
187 (p)[1] = (0x80 | ((b) & 0x3F)), \
188 2)
189
190
191 /* Store multibyte form of the character C in P and advance P to the
192 end of the multibyte form. The caller should allocate at least
193 MAX_MULTIBYTE_LENGTH bytes area at P in advance. */
194
195 #define CHAR_STRING_ADVANCE(c, p) \
196 do { \
197 if ((c) <= MAX_1_BYTE_CHAR) \
198 *(p)++ = (c); \
199 else if ((c) <= MAX_2_BYTE_CHAR) \
200 *(p)++ = (0xC0 | ((c) >> 6)), \
201 *(p)++ = (0x80 | ((c) & 0x3F)); \
202 else if ((c) <= MAX_3_BYTE_CHAR) \
203 *(p)++ = (0xE0 | ((c) >> 12)), \
204 *(p)++ = (0x80 | (((c) >> 6) & 0x3F)), \
205 *(p)++ = (0x80 | ((c) & 0x3F)); \
206 else \
207 (p) += char_string ((c), (p)); \
208 } while (0)
209
210
211 /* Nonzero iff BYTE starts a non-ASCII character in a multibyte
212 form. */
213 #define LEADING_CODE_P(byte) (((byte) & 0xC0) == 0xC0)
214
215 /* Nonzero iff BYTE is a trailing code of a non-ASCII character in a
216 multibyte form. */
217 #define TRAILING_CODE_P(byte) (((byte) & 0xC0) == 0x80)
218
219 /* Nonzero iff BYTE starts a character in a multibyte form.
220 This is equivalent to:
221 (ASCII_BYTE_P (byte) || LEADING_CODE_P (byte)) */
222 #define CHAR_HEAD_P(byte) (((byte) & 0xC0) != 0x80)
223
224 /* How many bytes a character that starts with BYTE occupies in a
225 multibyte form. */
226 #define BYTES_BY_CHAR_HEAD(byte) \
227 (!((byte) & 0x80) ? 1 \
228 : !((byte) & 0x20) ? 2 \
229 : !((byte) & 0x10) ? 3 \
230 : !((byte) & 0x08) ? 4 \
231 : 5)
232
233
234 /* The byte length of multibyte form at unibyte string P ending at
235 PEND. If STR doesn't point to a valid multibyte form, return 0. */
236
237 #define MULTIBYTE_LENGTH(p, pend) \
238 (p >= pend ? 0 \
239 : !((p)[0] & 0x80) ? 1 \
240 : ((p + 1 >= pend) || (((p)[1] & 0xC0) != 0x80)) ? 0 \
241 : ((p)[0] & 0xE0) == 0xC0 ? 2 \
242 : ((p + 2 >= pend) || (((p)[2] & 0xC0) != 0x80)) ? 0 \
243 : ((p)[0] & 0xF0) == 0xE0 ? 3 \
244 : ((p + 3 >= pend) || (((p)[3] & 0xC0) != 0x80)) ? 0 \
245 : ((p)[0] & 0xF8) == 0xF0 ? 4 \
246 : ((p + 4 >= pend) || (((p)[4] & 0xC0) != 0x80)) ? 0 \
247 : (p)[0] == 0xF8 && ((p)[1] & 0xF0) == 0x80 ? 5 \
248 : 0)
249
250
251 /* Like MULTIBYTE_LENGTH, but don't check the ending address. */
252
253 #define MULTIBYTE_LENGTH_NO_CHECK(p) \
254 (!((p)[0] & 0x80) ? 1 \
255 : ((p)[1] & 0xC0) != 0x80 ? 0 \
256 : ((p)[0] & 0xE0) == 0xC0 ? 2 \
257 : ((p)[2] & 0xC0) != 0x80 ? 0 \
258 : ((p)[0] & 0xF0) == 0xE0 ? 3 \
259 : ((p)[3] & 0xC0) != 0x80 ? 0 \
260 : ((p)[0] & 0xF8) == 0xF0 ? 4 \
261 : ((p)[4] & 0xC0) != 0x80 ? 0 \
262 : (p)[0] == 0xF8 && ((p)[1] & 0xF0) == 0x80 ? 5 \
263 : 0)
264
265 /* If P is before LIMIT, advance P to the next character boundary.
266 Assumes that P is already at a character boundary of the same
267 multibyte form whose end address is LIMIT. */
268
269 #define NEXT_CHAR_BOUNDARY(p, limit) \
270 do { \
271 if ((p) < (limit)) \
272 (p) += BYTES_BY_CHAR_HEAD (*(p)); \
273 } while (0)
274
275
276 /* If P is after LIMIT, advance P to the previous character boundary.
277 Assumes that P is already at a character boundary of the same
278 multibyte form whose beginning address is LIMIT. */
279
280 #define PREV_CHAR_BOUNDARY(p, limit) \
281 do { \
282 if ((p) > (limit)) \
283 { \
284 const unsigned char *p0 = (p); \
285 do { \
286 p0--; \
287 } while (p0 >= limit && ! CHAR_HEAD_P (*p0)); \
288 (p) = (BYTES_BY_CHAR_HEAD (*p0) == (p) - p0) ? p0 : (p) - 1; \
289 } \
290 } while (0)
291
292 /* Return the character code of character whose multibyte form is at
293 P. */
294
295 #define STRING_CHAR(p) \
296 (!((p)[0] & 0x80) \
297 ? (p)[0] \
298 : ! ((p)[0] & 0x20) \
299 ? (((((p)[0] & 0x1F) << 6) \
300 | ((p)[1] & 0x3F)) \
301 + (((unsigned char) (p)[0]) < 0xC2 ? 0x3FFF80 : 0)) \
302 : ! ((p)[0] & 0x10) \
303 ? ((((p)[0] & 0x0F) << 12) \
304 | (((p)[1] & 0x3F) << 6) \
305 | ((p)[2] & 0x3F)) \
306 : string_char ((p), NULL, NULL))
307
308
309 /* Like STRING_CHAR, but set ACTUAL_LEN to the length of multibyte
310 form. */
311
312 #define STRING_CHAR_AND_LENGTH(p, actual_len) \
313 (!((p)[0] & 0x80) \
314 ? ((actual_len) = 1, (p)[0]) \
315 : ! ((p)[0] & 0x20) \
316 ? ((actual_len) = 2, \
317 (((((p)[0] & 0x1F) << 6) \
318 | ((p)[1] & 0x3F)) \
319 + (((unsigned char) (p)[0]) < 0xC2 ? 0x3FFF80 : 0))) \
320 : ! ((p)[0] & 0x10) \
321 ? ((actual_len) = 3, \
322 ((((p)[0] & 0x0F) << 12) \
323 | (((p)[1] & 0x3F) << 6) \
324 | ((p)[2] & 0x3F))) \
325 : string_char ((p), NULL, &actual_len))
326
327
328 /* Like STRING_CHAR, but advance P to the end of multibyte form. */
329
330 #define STRING_CHAR_ADVANCE(p) \
331 (!((p)[0] & 0x80) \
332 ? *(p)++ \
333 : ! ((p)[0] & 0x20) \
334 ? ((p) += 2, \
335 ((((p)[-2] & 0x1F) << 6) \
336 | ((p)[-1] & 0x3F) \
337 | ((unsigned char) ((p)[-2]) < 0xC2 ? 0x3FFF80 : 0))) \
338 : ! ((p)[0] & 0x10) \
339 ? ((p) += 3, \
340 ((((p)[-3] & 0x0F) << 12) \
341 | (((p)[-2] & 0x3F) << 6) \
342 | ((p)[-1] & 0x3F))) \
343 : string_char ((p), &(p), NULL))
344
345
346 /* Fetch the "next" character from Lisp string STRING at byte position
347 BYTEIDX, character position CHARIDX. Store it into OUTPUT.
348
349 All the args must be side-effect-free.
350 BYTEIDX and CHARIDX must be lvalues;
351 we increment them past the character fetched. */
352
353 #define FETCH_STRING_CHAR_ADVANCE(OUTPUT, STRING, CHARIDX, BYTEIDX) \
354 do \
355 { \
356 CHARIDX++; \
357 if (STRING_MULTIBYTE (STRING)) \
358 { \
359 unsigned char *ptr = &SDATA (STRING)[BYTEIDX]; \
360 int len; \
361 \
362 OUTPUT = STRING_CHAR_AND_LENGTH (ptr, len); \
363 BYTEIDX += len; \
364 } \
365 else \
366 { \
367 OUTPUT = SREF (STRING, BYTEIDX); \
368 BYTEIDX++; \
369 } \
370 } \
371 while (0)
372
373 /* Like FETCH_STRING_CHAR_ADVANCE, but return a multibyte character
374 even if STRING is unibyte. */
375
376 #define FETCH_STRING_CHAR_AS_MULTIBYTE_ADVANCE(OUTPUT, STRING, CHARIDX, BYTEIDX) \
377 do \
378 { \
379 CHARIDX++; \
380 if (STRING_MULTIBYTE (STRING)) \
381 { \
382 unsigned char *ptr = &SDATA (STRING)[BYTEIDX]; \
383 int len; \
384 \
385 OUTPUT = STRING_CHAR_AND_LENGTH (ptr, len); \
386 BYTEIDX += len; \
387 } \
388 else \
389 { \
390 OUTPUT = SREF (STRING, BYTEIDX); \
391 BYTEIDX++; \
392 MAKE_CHAR_MULTIBYTE (OUTPUT); \
393 } \
394 } \
395 while (0)
396
397
398 /* Like FETCH_STRING_CHAR_ADVANCE, but assumes STRING is multibyte. */
399
400 #define FETCH_STRING_CHAR_ADVANCE_NO_CHECK(OUTPUT, STRING, CHARIDX, BYTEIDX) \
401 do \
402 { \
403 unsigned char *ptr = &SDATA (STRING)[BYTEIDX]; \
404 int len; \
405 \
406 OUTPUT = STRING_CHAR_AND_LENGTH (ptr, len); \
407 BYTEIDX += len; \
408 CHARIDX++; \
409 } \
410 while (0)
411
412
413 /* Like FETCH_STRING_CHAR_ADVANCE, but fetch character from the current
414 buffer. */
415
416 #define FETCH_CHAR_ADVANCE(OUTPUT, CHARIDX, BYTEIDX) \
417 do \
418 { \
419 CHARIDX++; \
420 if (!NILP (current_buffer->enable_multibyte_characters)) \
421 { \
422 unsigned char *ptr = BYTE_POS_ADDR (BYTEIDX); \
423 int len; \
424 \
425 OUTPUT= STRING_CHAR_AND_LENGTH (ptr, len); \
426 BYTEIDX += len; \
427 } \
428 else \
429 { \
430 OUTPUT = *(BYTE_POS_ADDR (BYTEIDX)); \
431 BYTEIDX++; \
432 } \
433 } \
434 while (0)
435
436
437 /* Like FETCH_CHAR_ADVANCE, but assumes the current buffer is multibyte. */
438
439 #define FETCH_CHAR_ADVANCE_NO_CHECK(OUTPUT, CHARIDX, BYTEIDX) \
440 do \
441 { \
442 unsigned char *ptr = BYTE_POS_ADDR (BYTEIDX); \
443 int len; \
444 \
445 OUTPUT = STRING_CHAR_AND_LENGTH (ptr, len); \
446 BYTEIDX += len; \
447 CHARIDX++; \
448 } \
449 while (0)
450
451
452 /* Increment the buffer byte position POS_BYTE of the current buffer to
453 the next character boundary. No range checking of POS. */
454
455 #define INC_POS(pos_byte) \
456 do { \
457 unsigned char *p = BYTE_POS_ADDR (pos_byte); \
458 pos_byte += BYTES_BY_CHAR_HEAD (*p); \
459 } while (0)
460
461
462 /* Decrement the buffer byte position POS_BYTE of the current buffer to
463 the previous character boundary. No range checking of POS. */
464
465 #define DEC_POS(pos_byte) \
466 do { \
467 unsigned char *p; \
468 \
469 pos_byte--; \
470 if (pos_byte < GPT_BYTE) \
471 p = BEG_ADDR + pos_byte - BEG_BYTE; \
472 else \
473 p = BEG_ADDR + GAP_SIZE + pos_byte - BEG_BYTE;\
474 while (!CHAR_HEAD_P (*p)) \
475 { \
476 p--; \
477 pos_byte--; \
478 } \
479 } while (0)
480
481 /* Increment both CHARPOS and BYTEPOS, each in the appropriate way. */
482
483 #define INC_BOTH(charpos, bytepos) \
484 do \
485 { \
486 (charpos)++; \
487 if (NILP (current_buffer->enable_multibyte_characters)) \
488 (bytepos)++; \
489 else \
490 INC_POS ((bytepos)); \
491 } \
492 while (0)
493
494
495 /* Decrement both CHARPOS and BYTEPOS, each in the appropriate way. */
496
497 #define DEC_BOTH(charpos, bytepos) \
498 do \
499 { \
500 (charpos)--; \
501 if (NILP (current_buffer->enable_multibyte_characters)) \
502 (bytepos)--; \
503 else \
504 DEC_POS ((bytepos)); \
505 } \
506 while (0)
507
508
509 /* Increment the buffer byte position POS_BYTE of the current buffer to
510 the next character boundary. This macro relies on the fact that
511 *GPT_ADDR and *Z_ADDR are always accessible and the values are
512 '\0'. No range checking of POS_BYTE. */
513
514 #define BUF_INC_POS(buf, pos_byte) \
515 do { \
516 unsigned char *p = BUF_BYTE_ADDRESS (buf, pos_byte); \
517 pos_byte += BYTES_BY_CHAR_HEAD (*p); \
518 } while (0)
519
520
521 /* Decrement the buffer byte position POS_BYTE of the current buffer to
522 the previous character boundary. No range checking of POS_BYTE. */
523
524 #define BUF_DEC_POS(buf, pos_byte) \
525 do { \
526 unsigned char *p; \
527 pos_byte--; \
528 if (pos_byte < BUF_GPT_BYTE (buf)) \
529 p = BUF_BEG_ADDR (buf) + pos_byte - BEG_BYTE; \
530 else \
531 p = BUF_BEG_ADDR (buf) + BUF_GAP_SIZE (buf) + pos_byte - BEG_BYTE;\
532 while (!CHAR_HEAD_P (*p)) \
533 { \
534 p--; \
535 pos_byte--; \
536 } \
537 } while (0)
538
539
540 /* If C is a character to be unified with a Unicode character, return
541 the unified Unicode character. */
542
543 #define MAYBE_UNIFY_CHAR(c) \
544 do { \
545 if (c > MAX_UNICODE_CHAR && c <= MAX_5_BYTE_CHAR) \
546 { \
547 Lisp_Object val; \
548 val = CHAR_TABLE_REF (Vchar_unify_table, c); \
549 if (INTEGERP (val)) \
550 c = XINT (val); \
551 else if (! NILP (val)) \
552 c = maybe_unify_char (c, val); \
553 } \
554 } while (0)
555
556
557 /* Return the width of ASCII character C. The width is measured by
558 how many columns C will occupy on the screen when displayed in the
559 current buffer. */
560
561 #define ASCII_CHAR_WIDTH(c) \
562 (c < 0x20 \
563 ? (c == '\t' \
564 ? XFASTINT (current_buffer->tab_width) \
565 : (c == '\n' ? 0 : (NILP (current_buffer->ctl_arrow) ? 4 : 2))) \
566 : (c < 0x7f \
567 ? 1 \
568 : ((NILP (current_buffer->ctl_arrow) ? 4 : 2))))
569
570 /* Return the width of character C. The width is measured by how many
571 columns C will occupy on the screen when displayed in the current
572 buffer. */
573
574 #define CHAR_WIDTH(c) \
575 (ASCII_CHAR_P (c) \
576 ? ASCII_CHAR_WIDTH (c) \
577 : XINT (CHAR_TABLE_REF (Vchar_width_table, c)))
578
579 /* If C is a variation selector, return the index numnber of the
580 variation selector (1..256). Otherwise, return 0. */
581
582 #define CHAR_VARIATION_SELECTOR_P(c) \
583 ((c) < 0xFE00 ? 0 \
584 : (c) <= 0xFE0F ? (c) - 0xFE00 + 1 \
585 : (c) < 0xE0100 ? 0 \
586 : (c) <= 0xE01EF ? (c) - 0xE0100 + 17 \
587 : 0)
588
589 /* If C is a high surrogate, return 1. If C is a low surrogate,
590 return 0. Otherwise, return 0. */
591
592 #define CHAR_SURROGATE_PAIR_P(c) \
593 ((c) < 0xD800 ? 0 \
594 : (c) <= 0xDBFF ? 1 \
595 : (c) <= 0xDFFF ? 2 \
596 : 0)
597
598
599 extern int char_resolve_modifier_mask (int);
600 extern int char_string (unsigned, unsigned char *);
601 extern int string_char (const unsigned char *,
602 const unsigned char **, int *);
603
604 extern int translate_char (Lisp_Object, int c);
605 extern int char_printable_p (int c);
606 extern void parse_str_as_multibyte (const unsigned char *, int, int *,
607 int *);
608 extern int parse_str_to_multibyte (unsigned char *, int);
609 extern int str_as_multibyte (unsigned char *, int, int, int *);
610 extern int str_to_multibyte (unsigned char *, int, int);
611 extern int str_as_unibyte (unsigned char *, int);
612 extern EMACS_INT str_to_unibyte (const unsigned char *, unsigned char *,
613 EMACS_INT, int);
614 extern int strwidth (unsigned char *, int);
615 extern int c_string_width (const unsigned char *, int, int, int *, int *);
616 extern int lisp_string_width (Lisp_Object, int, int *, int *);
617
618 extern Lisp_Object Vprintable_chars;
619
620 extern Lisp_Object Qcharacterp, Qauto_fill_chars;
621 extern Lisp_Object Vtranslation_table_vector;
622 extern Lisp_Object Vchar_width_table;
623 extern Lisp_Object Vchar_direction_table;
624 extern Lisp_Object Vchar_unify_table;
625 extern Lisp_Object Vunicode_category_table;
626
627 extern Lisp_Object string_escape_byte8 (Lisp_Object);
628
629 /* Return a translation table of id number ID. */
630 #define GET_TRANSLATION_TABLE(id) \
631 (XCDR(XVECTOR(Vtranslation_table_vector)->contents[(id)]))
632
633 /* A char-table for characters which may invoke auto-filling. */
634 extern Lisp_Object Vauto_fill_chars;
635
636 extern Lisp_Object Vchar_script_table;
637 extern Lisp_Object Vscript_representative_chars;
638
639 /* Copy LEN bytes from FROM to TO. This macro should be used only
640 when a caller knows that LEN is short and the obvious copy loop is
641 faster than calling bcopy which has some overhead. Copying a
642 multibyte sequence of a character is the typical case. */
643
644 #define BCOPY_SHORT(from, to, len) \
645 do { \
646 int i = len; \
647 unsigned char *from_p = from, *to_p = to; \
648 while (i--) *to_p++ = *from_p++; \
649 } while (0)
650
651 #define DEFSYM(sym, name) \
652 do { (sym) = intern_c_string ((name)); staticpro (&(sym)); } while (0)
653
654 #endif /* EMACS_CHARACTER_H */
655
656 /* arch-tag: 4ef86004-2eff-4073-8cea-cfcbcf7188ac
657 (do not change this comment) */