Commit | Line | Data |
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0168c3d8 | 1 | /* Basic character support. |
73b0cd50 GM |
2 | |
3 | Copyright (C) 2001-2011 Free Software Foundation, Inc. | |
4 | Copyright (C) 1995, 1997, 1998, 2001 Electrotechnical Laboratory, JAPAN. | |
5 | Licensed to the Free Software Foundation. | |
6 | Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 | |
7 | National Institute of Advanced Industrial Science and Technology (AIST) | |
8 | Registration Number H13PRO009 | |
0168c3d8 KH |
9 | |
10 | This file is part of GNU Emacs. | |
11 | ||
9ec0b715 | 12 | GNU Emacs is free software: you can redistribute it and/or modify |
0168c3d8 | 13 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
14 | the Free Software Foundation, either version 3 of the License, or |
15 | (at your option) any later version. | |
0168c3d8 KH |
16 | |
17 | GNU Emacs is distributed in the hope that it will be useful, | |
18 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | GNU General Public License for more details. | |
21 | ||
22 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 23 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
0168c3d8 KH |
24 | |
25 | /* At first, see the document in `character.h' to understand the code | |
26 | in this file. */ | |
27 | ||
28 | #ifdef emacs | |
29 | #include <config.h> | |
30 | #endif | |
31 | ||
32 | #include <stdio.h> | |
33 | ||
34 | #ifdef emacs | |
35 | ||
36 | #include <sys/types.h> | |
d7306fe6 | 37 | #include <setjmp.h> |
0168c3d8 KH |
38 | #include "lisp.h" |
39 | #include "character.h" | |
40 | #include "buffer.h" | |
41 | #include "charset.h" | |
42 | #include "composite.h" | |
43 | #include "disptab.h" | |
44 | ||
45 | #else /* not emacs */ | |
46 | ||
47 | #include "mulelib.h" | |
48 | ||
49 | #endif /* emacs */ | |
50 | ||
51 | Lisp_Object Qcharacterp; | |
52 | ||
0168c3d8 KH |
53 | Lisp_Object Qauto_fill_chars; |
54 | ||
33f91981 | 55 | /* Char-table of information about which character to unify to which |
6f1b43a0 | 56 | Unicode character. Mainly used by the macro MAYBE_UNIFY_CHAR. */ |
0168c3d8 KH |
57 | Lisp_Object Vchar_unify_table; |
58 | ||
8973478b | 59 | /* Variable used locally in the macro FETCH_MULTIBYTE_CHAR. */ |
0168c3d8 | 60 | unsigned char *_fetch_multibyte_char_p; |
0168c3d8 | 61 | |
c57f3328 KH |
62 | static Lisp_Object Qchar_script_table; |
63 | ||
0168c3d8 KH |
64 | \f |
65 | ||
2bde7652 KH |
66 | /* If character code C has modifier masks, reflect them to the |
67 | character code if possible. Return the resulting code. */ | |
68 | ||
69 | int | |
971de7fb | 70 | char_resolve_modifier_mask (int c) |
2bde7652 | 71 | { |
d0363d44 | 72 | /* A non-ASCII character can't reflect modifier bits to the code. */ |
2bde7652 KH |
73 | if (! ASCII_CHAR_P ((c & ~CHAR_MODIFIER_MASK))) |
74 | return c; | |
75 | ||
76 | /* For Meta, Shift, and Control modifiers, we need special care. */ | |
2bde7652 KH |
77 | if (c & CHAR_SHIFT) |
78 | { | |
79 | /* Shift modifier is valid only with [A-Za-z]. */ | |
80 | if ((c & 0377) >= 'A' && (c & 0377) <= 'Z') | |
81 | c &= ~CHAR_SHIFT; | |
82 | else if ((c & 0377) >= 'a' && (c & 0377) <= 'z') | |
83 | c = (c & ~CHAR_SHIFT) - ('a' - 'A'); | |
03365d0e KH |
84 | /* Shift modifier for control characters and SPC is ignored. */ |
85 | else if ((c & ~CHAR_MODIFIER_MASK) <= 0x20) | |
d0363d44 KH |
86 | c &= ~CHAR_SHIFT; |
87 | } | |
2bde7652 KH |
88 | if (c & CHAR_CTL) |
89 | { | |
90 | /* Simulate the code in lread.c. */ | |
91 | /* Allow `\C- ' and `\C-?'. */ | |
03365d0e KH |
92 | if ((c & 0377) == ' ') |
93 | c &= ~0177 & ~ CHAR_CTL; | |
94 | else if ((c & 0377) == '?') | |
95 | c = 0177 | (c & ~0177 & ~CHAR_CTL); | |
2bde7652 KH |
96 | /* ASCII control chars are made from letters (both cases), |
97 | as well as the non-letters within 0100...0137. */ | |
98 | else if ((c & 0137) >= 0101 && (c & 0137) <= 0132) | |
99 | c &= (037 | (~0177 & ~CHAR_CTL)); | |
100 | else if ((c & 0177) >= 0100 && (c & 0177) <= 0137) | |
101 | c &= (037 | (~0177 & ~CHAR_CTL)); | |
102 | } | |
e9c1637d | 103 | #if 0 /* This is outside the scope of this function. (bug#4751) */ |
03365d0e KH |
104 | if (c & CHAR_META) |
105 | { | |
106 | /* Move the meta bit to the right place for a string. */ | |
107 | c = (c & ~CHAR_META) | 0x80; | |
108 | } | |
e9c1637d | 109 | #endif |
2bde7652 KH |
110 | |
111 | return c; | |
112 | } | |
113 | ||
114 | ||
33f91981 KH |
115 | /* Store multibyte form of character C at P. If C has modifier bits, |
116 | handle them appropriately. */ | |
117 | ||
0168c3d8 | 118 | int |
971de7fb | 119 | char_string (unsigned int c, unsigned char *p) |
0168c3d8 KH |
120 | { |
121 | int bytes; | |
122 | ||
e3d8eb8c KH |
123 | if (c & CHAR_MODIFIER_MASK) |
124 | { | |
2bde7652 | 125 | c = (unsigned) char_resolve_modifier_mask ((int) c); |
e3d8eb8c KH |
126 | /* If C still has any modifier bits, just ignore it. */ |
127 | c &= ~CHAR_MODIFIER_MASK; | |
128 | } | |
129 | ||
0168c3d8 KH |
130 | MAYBE_UNIFY_CHAR (c); |
131 | ||
e3d8eb8c | 132 | if (c <= MAX_3_BYTE_CHAR) |
0168c3d8 KH |
133 | { |
134 | bytes = CHAR_STRING (c, p); | |
135 | } | |
136 | else if (c <= MAX_4_BYTE_CHAR) | |
137 | { | |
138 | p[0] = (0xF0 | (c >> 18)); | |
139 | p[1] = (0x80 | ((c >> 12) & 0x3F)); | |
140 | p[2] = (0x80 | ((c >> 6) & 0x3F)); | |
141 | p[3] = (0x80 | (c & 0x3F)); | |
142 | bytes = 4; | |
143 | } | |
e3d8eb8c | 144 | else if (c <= MAX_5_BYTE_CHAR) |
0168c3d8 KH |
145 | { |
146 | p[0] = 0xF8; | |
147 | p[1] = (0x80 | ((c >> 18) & 0x0F)); | |
148 | p[2] = (0x80 | ((c >> 12) & 0x3F)); | |
149 | p[3] = (0x80 | ((c >> 6) & 0x3F)); | |
150 | p[4] = (0x80 | (c & 0x3F)); | |
151 | bytes = 5; | |
152 | } | |
5aa91c9b | 153 | else if (c <= MAX_CHAR) |
e3d8eb8c KH |
154 | { |
155 | c = CHAR_TO_BYTE8 (c); | |
156 | bytes = BYTE8_STRING (c, p); | |
157 | } | |
5aa91c9b KH |
158 | else |
159 | error ("Invalid character: %d", c); | |
1889b238 | 160 | |
0168c3d8 KH |
161 | return bytes; |
162 | } | |
163 | ||
164 | ||
33f91981 KH |
165 | /* Return a character whose multibyte form is at P. Set LEN is not |
166 | NULL, it must be a pointer to integer. In that case, set *LEN to | |
167 | the byte length of the multibyte form. If ADVANCED is not NULL, is | |
168 | must be a pointer to unsigned char. In that case, set *ADVANCED to | |
169 | the ending address (i.e. the starting address of the next | |
170 | character) of the multibyte form. */ | |
171 | ||
0168c3d8 | 172 | int |
971de7fb | 173 | string_char (const unsigned char *p, const unsigned char **advanced, int *len) |
0168c3d8 | 174 | { |
1889b238 | 175 | int c; |
15843e6f | 176 | const unsigned char *saved_p = p; |
0168c3d8 KH |
177 | |
178 | if (*p < 0x80 || ! (*p & 0x20) || ! (*p & 0x10)) | |
179 | { | |
180 | c = STRING_CHAR_ADVANCE (p); | |
181 | } | |
182 | else if (! (*p & 0x08)) | |
183 | { | |
184 | c = ((((p)[0] & 0xF) << 18) | |
185 | | (((p)[1] & 0x3F) << 12) | |
186 | | (((p)[2] & 0x3F) << 6) | |
187 | | ((p)[3] & 0x3F)); | |
188 | p += 4; | |
189 | } | |
190 | else | |
191 | { | |
192 | c = ((((p)[1] & 0x3F) << 18) | |
193 | | (((p)[2] & 0x3F) << 12) | |
194 | | (((p)[3] & 0x3F) << 6) | |
195 | | ((p)[4] & 0x3F)); | |
196 | p += 5; | |
197 | } | |
198 | ||
199 | MAYBE_UNIFY_CHAR (c); | |
200 | ||
201 | if (len) | |
202 | *len = p - saved_p; | |
203 | if (advanced) | |
204 | *advanced = p; | |
205 | return c; | |
206 | } | |
207 | ||
208 | ||
209 | /* Translate character C by translation table TABLE. If C is | |
210 | negative, translate a character specified by CHARSET and CODE. If | |
211 | no translation is found in TABLE, return the untranslated | |
10453be9 KH |
212 | character. If TABLE is a list, elements are char tables. In this |
213 | case, translace C by all tables. */ | |
0168c3d8 KH |
214 | |
215 | int | |
971de7fb | 216 | translate_char (Lisp_Object table, int c) |
0168c3d8 | 217 | { |
10453be9 KH |
218 | if (CHAR_TABLE_P (table)) |
219 | { | |
220 | Lisp_Object ch; | |
221 | ||
222 | ch = CHAR_TABLE_REF (table, c); | |
223 | if (CHARACTERP (ch)) | |
224 | c = XINT (ch); | |
225 | } | |
226 | else | |
227 | { | |
228 | for (; CONSP (table); table = XCDR (table)) | |
229 | c = translate_char (XCAR (table), c); | |
230 | } | |
231 | return c; | |
0168c3d8 KH |
232 | } |
233 | ||
2e5db15c KH |
234 | /* Convert ASCII or 8-bit character C to unibyte. If C is none of |
235 | them, return (C & 0xFF). | |
0168c3d8 KH |
236 | |
237 | The argument REV_TBL is now ignored. It will be removed in the | |
238 | future. */ | |
239 | ||
240 | int | |
971de7fb | 241 | multibyte_char_to_unibyte (int c, Lisp_Object rev_tbl) |
0168c3d8 | 242 | { |
2e5db15c KH |
243 | if (c < 0x80) |
244 | return c; | |
b672c5ae KH |
245 | if (CHAR_BYTE8_P (c)) |
246 | return CHAR_TO_BYTE8 (c); | |
2e5db15c | 247 | return (c & 0xFF); |
0168c3d8 KH |
248 | } |
249 | ||
935d5b02 KH |
250 | /* Like multibyte_char_to_unibyte, but return -1 if C is not supported |
251 | by charset_unibyte. */ | |
252 | ||
253 | int | |
971de7fb | 254 | multibyte_char_to_unibyte_safe (int c) |
935d5b02 | 255 | { |
2e5db15c KH |
256 | if (c < 0x80) |
257 | return c; | |
935d5b02 KH |
258 | if (CHAR_BYTE8_P (c)) |
259 | return CHAR_TO_BYTE8 (c); | |
2e5db15c | 260 | return -1; |
935d5b02 | 261 | } |
0168c3d8 KH |
262 | |
263 | DEFUN ("characterp", Fcharacterp, Scharacterp, 1, 2, 0, | |
264 | doc: /* Return non-nil if OBJECT is a character. */) | |
5842a27b | 265 | (Lisp_Object object, Lisp_Object ignore) |
0168c3d8 KH |
266 | { |
267 | return (CHARACTERP (object) ? Qt : Qnil); | |
268 | } | |
269 | ||
270 | DEFUN ("max-char", Fmax_char, Smax_char, 0, 0, 0, | |
271 | doc: /* Return the character of the maximum code. */) | |
5842a27b | 272 | (void) |
0168c3d8 KH |
273 | { |
274 | return make_number (MAX_CHAR); | |
275 | } | |
276 | ||
277 | DEFUN ("unibyte-char-to-multibyte", Funibyte_char_to_multibyte, | |
278 | Sunibyte_char_to_multibyte, 1, 1, 0, | |
5556875b | 279 | doc: /* Convert the byte CH to multibyte character. */) |
5842a27b | 280 | (Lisp_Object ch) |
0168c3d8 KH |
281 | { |
282 | int c; | |
0168c3d8 KH |
283 | |
284 | CHECK_CHARACTER (ch); | |
285 | c = XFASTINT (ch); | |
2e5db15c KH |
286 | if (c >= 0x100) |
287 | error ("Not a unibyte character: %d", c); | |
4c0354d7 | 288 | MAKE_CHAR_MULTIBYTE (c); |
0168c3d8 KH |
289 | return make_number (c); |
290 | } | |
291 | ||
292 | DEFUN ("multibyte-char-to-unibyte", Fmultibyte_char_to_unibyte, | |
293 | Smultibyte_char_to_unibyte, 1, 1, 0, | |
5556875b SM |
294 | doc: /* Convert the multibyte character CH to a byte. |
295 | If the multibyte character does not represent a byte, return -1. */) | |
5842a27b | 296 | (Lisp_Object ch) |
0168c3d8 | 297 | { |
5556875b | 298 | int cm; |
0168c3d8 KH |
299 | |
300 | CHECK_CHARACTER (ch); | |
5556875b SM |
301 | cm = XFASTINT (ch); |
302 | if (cm < 256) | |
303 | /* Can't distinguish a byte read from a unibyte buffer from | |
304 | a latin1 char, so let's let it slide. */ | |
305 | return ch; | |
306 | else | |
307 | { | |
2afc21f5 | 308 | int cu = CHAR_TO_BYTE_SAFE (cm); |
5556875b SM |
309 | return make_number (cu); |
310 | } | |
0168c3d8 KH |
311 | } |
312 | ||
0168c3d8 KH |
313 | DEFUN ("char-width", Fchar_width, Schar_width, 1, 1, 0, |
314 | doc: /* Return width of CHAR when displayed in the current buffer. | |
315 | The width is measured by how many columns it occupies on the screen. | |
add553ac JB |
316 | Tab is taken to occupy `tab-width' columns. |
317 | usage: (char-width CHAR) */) | |
5842a27b | 318 | (Lisp_Object ch) |
0168c3d8 KH |
319 | { |
320 | Lisp_Object disp; | |
321 | int c, width; | |
322 | struct Lisp_Char_Table *dp = buffer_display_table (); | |
323 | ||
324 | CHECK_CHARACTER (ch); | |
325 | c = XINT (ch); | |
326 | ||
327 | /* Get the way the display table would display it. */ | |
328 | disp = dp ? DISP_CHAR_VECTOR (dp, c) : Qnil; | |
329 | ||
330 | if (VECTORP (disp)) | |
331 | width = ASIZE (disp); | |
332 | else | |
333 | width = CHAR_WIDTH (c); | |
334 | ||
335 | return make_number (width); | |
336 | } | |
337 | ||
0168c3d8 KH |
338 | /* Return width of string STR of length LEN when displayed in the |
339 | current buffer. The width is measured by how many columns it | |
340 | occupies on the screen. If PRECISION > 0, return the width of | |
341 | longest substring that doesn't exceed PRECISION, and set number of | |
342 | characters and bytes of the substring in *NCHARS and *NBYTES | |
343 | respectively. */ | |
344 | ||
579c18d0 EZ |
345 | EMACS_INT |
346 | c_string_width (const unsigned char *str, EMACS_INT len, int precision, | |
347 | EMACS_INT *nchars, EMACS_INT *nbytes) | |
0168c3d8 | 348 | { |
579c18d0 EZ |
349 | EMACS_INT i = 0, i_byte = 0; |
350 | EMACS_INT width = 0; | |
0168c3d8 KH |
351 | struct Lisp_Char_Table *dp = buffer_display_table (); |
352 | ||
353 | while (i_byte < len) | |
354 | { | |
355 | int bytes, thiswidth; | |
356 | Lisp_Object val; | |
62a6e103 | 357 | int c = STRING_CHAR_AND_LENGTH (str + i_byte, bytes); |
0168c3d8 KH |
358 | |
359 | if (dp) | |
360 | { | |
361 | val = DISP_CHAR_VECTOR (dp, c); | |
362 | if (VECTORP (val)) | |
363 | thiswidth = XVECTOR (val)->size; | |
364 | else | |
365 | thiswidth = CHAR_WIDTH (c); | |
366 | } | |
367 | else | |
368 | { | |
369 | thiswidth = CHAR_WIDTH (c); | |
370 | } | |
371 | ||
372 | if (precision > 0 | |
373 | && (width + thiswidth > precision)) | |
374 | { | |
375 | *nchars = i; | |
376 | *nbytes = i_byte; | |
377 | return width; | |
378 | } | |
379 | i++; | |
380 | i_byte += bytes; | |
381 | width += thiswidth; | |
382 | } | |
383 | ||
384 | if (precision > 0) | |
385 | { | |
386 | *nchars = i; | |
387 | *nbytes = i_byte; | |
388 | } | |
389 | ||
390 | return width; | |
391 | } | |
392 | ||
1889b238 KH |
393 | /* Return width of string STR of length LEN when displayed in the |
394 | current buffer. The width is measured by how many columns it | |
395 | occupies on the screen. */ | |
396 | ||
579c18d0 EZ |
397 | EMACS_INT |
398 | strwidth (const unsigned char *str, EMACS_INT len) | |
1889b238 KH |
399 | { |
400 | return c_string_width (str, len, -1, NULL, NULL); | |
401 | } | |
402 | ||
0168c3d8 KH |
403 | /* Return width of Lisp string STRING when displayed in the current |
404 | buffer. The width is measured by how many columns it occupies on | |
405 | the screen while paying attention to compositions. If PRECISION > | |
406 | 0, return the width of longest substring that doesn't exceed | |
407 | PRECISION, and set number of characters and bytes of the substring | |
408 | in *NCHARS and *NBYTES respectively. */ | |
409 | ||
579c18d0 EZ |
410 | EMACS_INT |
411 | lisp_string_width (Lisp_Object string, int precision, | |
412 | EMACS_INT *nchars, EMACS_INT *nbytes) | |
0168c3d8 | 413 | { |
579c18d0 | 414 | EMACS_INT len = SCHARS (string); |
0aee65b9 KH |
415 | /* This set multibyte to 0 even if STRING is multibyte when it |
416 | contains only ascii and eight-bit-graphic, but that's | |
417 | intentional. */ | |
418 | int multibyte = len < SBYTES (string); | |
8f924df7 | 419 | unsigned char *str = SDATA (string); |
579c18d0 EZ |
420 | EMACS_INT i = 0, i_byte = 0; |
421 | EMACS_INT width = 0; | |
0168c3d8 KH |
422 | struct Lisp_Char_Table *dp = buffer_display_table (); |
423 | ||
424 | while (i < len) | |
425 | { | |
426 | int chars, bytes, thiswidth; | |
427 | Lisp_Object val; | |
428 | int cmp_id; | |
f4bc0685 | 429 | EMACS_INT ignore, end; |
0168c3d8 KH |
430 | |
431 | if (find_composition (i, -1, &ignore, &end, &val, string) | |
432 | && ((cmp_id = get_composition_id (i, i_byte, end - i, val, string)) | |
433 | >= 0)) | |
434 | { | |
435 | thiswidth = composition_table[cmp_id]->width; | |
436 | chars = end - i; | |
437 | bytes = string_char_to_byte (string, end) - i_byte; | |
438 | } | |
0168c3d8 KH |
439 | else |
440 | { | |
0aee65b9 | 441 | int c; |
0168c3d8 | 442 | |
0aee65b9 | 443 | if (multibyte) |
62a6e103 | 444 | c = STRING_CHAR_AND_LENGTH (str + i_byte, bytes); |
0aee65b9 KH |
445 | else |
446 | c = str[i_byte], bytes = 1; | |
0168c3d8 | 447 | chars = 1; |
0aee65b9 KH |
448 | if (dp) |
449 | { | |
450 | val = DISP_CHAR_VECTOR (dp, c); | |
451 | if (VECTORP (val)) | |
452 | thiswidth = XVECTOR (val)->size; | |
453 | else | |
454 | thiswidth = CHAR_WIDTH (c); | |
455 | } | |
456 | else | |
457 | { | |
458 | thiswidth = CHAR_WIDTH (c); | |
459 | } | |
0168c3d8 KH |
460 | } |
461 | ||
462 | if (precision > 0 | |
463 | && (width + thiswidth > precision)) | |
464 | { | |
465 | *nchars = i; | |
466 | *nbytes = i_byte; | |
467 | return width; | |
468 | } | |
469 | i += chars; | |
470 | i_byte += bytes; | |
471 | width += thiswidth; | |
472 | } | |
473 | ||
474 | if (precision > 0) | |
475 | { | |
476 | *nchars = i; | |
477 | *nbytes = i_byte; | |
478 | } | |
479 | ||
480 | return width; | |
481 | } | |
482 | ||
483 | DEFUN ("string-width", Fstring_width, Sstring_width, 1, 1, 0, | |
484 | doc: /* Return width of STRING when displayed in the current buffer. | |
485 | Width is measured by how many columns it occupies on the screen. | |
486 | When calculating width of a multibyte character in STRING, | |
487 | only the base leading-code is considered; the validity of | |
488 | the following bytes is not checked. Tabs in STRING are always | |
add553ac JB |
489 | taken to occupy `tab-width' columns. |
490 | usage: (string-width STRING) */) | |
5842a27b | 491 | (Lisp_Object str) |
0168c3d8 KH |
492 | { |
493 | Lisp_Object val; | |
494 | ||
495 | CHECK_STRING (str); | |
496 | XSETFASTINT (val, lisp_string_width (str, -1, NULL, NULL)); | |
497 | return val; | |
498 | } | |
499 | ||
500 | DEFUN ("char-direction", Fchar_direction, Schar_direction, 1, 1, 0, | |
501 | doc: /* Return the direction of CHAR. | |
add553ac JB |
502 | The returned value is 0 for left-to-right and 1 for right-to-left. |
503 | usage: (char-direction CHAR) */) | |
5842a27b | 504 | (Lisp_Object ch) |
0168c3d8 KH |
505 | { |
506 | int c; | |
507 | ||
508 | CHECK_CHARACTER (ch); | |
509 | c = XINT (ch); | |
510 | return CHAR_TABLE_REF (Vchar_direction_table, c); | |
511 | } | |
512 | ||
0168c3d8 KH |
513 | /* Return the number of characters in the NBYTES bytes at PTR. |
514 | This works by looking at the contents and checking for multibyte | |
515 | sequences while assuming that there's no invalid sequence. | |
516 | However, if the current buffer has enable-multibyte-characters = | |
517 | nil, we treat each byte as a character. */ | |
518 | ||
13818c30 | 519 | EMACS_INT |
971de7fb | 520 | chars_in_text (const unsigned char *ptr, EMACS_INT nbytes) |
0168c3d8 KH |
521 | { |
522 | /* current_buffer is null at early stages of Emacs initialization. */ | |
523 | if (current_buffer == 0 | |
524 | || NILP (current_buffer->enable_multibyte_characters)) | |
525 | return nbytes; | |
526 | ||
527 | return multibyte_chars_in_text (ptr, nbytes); | |
528 | } | |
529 | ||
530 | /* Return the number of characters in the NBYTES bytes at PTR. | |
531 | This works by looking at the contents and checking for multibyte | |
532 | sequences while assuming that there's no invalid sequence. It | |
533 | ignores enable-multibyte-characters. */ | |
534 | ||
13818c30 | 535 | EMACS_INT |
971de7fb | 536 | multibyte_chars_in_text (const unsigned char *ptr, EMACS_INT nbytes) |
0168c3d8 | 537 | { |
8f924df7 | 538 | const unsigned char *endp = ptr + nbytes; |
579c18d0 | 539 | EMACS_INT chars = 0; |
0168c3d8 KH |
540 | |
541 | while (ptr < endp) | |
542 | { | |
579c18d0 | 543 | EMACS_INT len = MULTIBYTE_LENGTH (ptr, endp); |
0168c3d8 KH |
544 | |
545 | if (len == 0) | |
546 | abort (); | |
547 | ptr += len; | |
548 | chars++; | |
549 | } | |
550 | ||
551 | return chars; | |
552 | } | |
553 | ||
554 | /* Parse unibyte text at STR of LEN bytes as a multibyte text, count | |
555 | characters and bytes in it, and store them in *NCHARS and *NBYTES | |
556 | respectively. On counting bytes, pay attention to that 8-bit | |
557 | characters not constructing a valid multibyte sequence are | |
558 | represented by 2-byte in a multibyte text. */ | |
559 | ||
560 | void | |
14162469 EZ |
561 | parse_str_as_multibyte (const unsigned char *str, EMACS_INT len, |
562 | EMACS_INT *nchars, EMACS_INT *nbytes) | |
0168c3d8 | 563 | { |
8f924df7 | 564 | const unsigned char *endp = str + len; |
14162469 | 565 | EMACS_INT n, chars = 0, bytes = 0; |
0168c3d8 KH |
566 | |
567 | if (len >= MAX_MULTIBYTE_LENGTH) | |
568 | { | |
8f924df7 | 569 | const unsigned char *adjusted_endp = endp - MAX_MULTIBYTE_LENGTH; |
0168c3d8 KH |
570 | while (str < adjusted_endp) |
571 | { | |
fc9a17bc KH |
572 | if (! CHAR_BYTE8_HEAD_P (*str) |
573 | && (n = MULTIBYTE_LENGTH_NO_CHECK (str)) > 0) | |
0168c3d8 KH |
574 | str += n, bytes += n; |
575 | else | |
576 | str++, bytes += 2; | |
577 | chars++; | |
578 | } | |
579 | } | |
580 | while (str < endp) | |
581 | { | |
fc9a17bc KH |
582 | if (! CHAR_BYTE8_HEAD_P (*str) |
583 | && (n = MULTIBYTE_LENGTH (str, endp)) > 0) | |
0168c3d8 KH |
584 | str += n, bytes += n; |
585 | else | |
586 | str++, bytes += 2; | |
587 | chars++; | |
588 | } | |
589 | ||
590 | *nchars = chars; | |
591 | *nbytes = bytes; | |
592 | return; | |
593 | } | |
594 | ||
595 | /* Arrange unibyte text at STR of NBYTES bytes as a multibyte text. | |
596 | It actually converts only such 8-bit characters that don't contruct | |
597 | a multibyte sequence to multibyte forms of Latin-1 characters. If | |
598 | NCHARS is nonzero, set *NCHARS to the number of characters in the | |
599 | text. It is assured that we can use LEN bytes at STR as a work | |
600 | area and that is enough. Return the number of bytes of the | |
601 | resulting text. */ | |
602 | ||
14162469 EZ |
603 | EMACS_INT |
604 | str_as_multibyte (unsigned char *str, EMACS_INT len, EMACS_INT nbytes, | |
605 | EMACS_INT *nchars) | |
0168c3d8 KH |
606 | { |
607 | unsigned char *p = str, *endp = str + nbytes; | |
608 | unsigned char *to; | |
14162469 | 609 | EMACS_INT chars = 0; |
0168c3d8 KH |
610 | int n; |
611 | ||
612 | if (nbytes >= MAX_MULTIBYTE_LENGTH) | |
613 | { | |
614 | unsigned char *adjusted_endp = endp - MAX_MULTIBYTE_LENGTH; | |
615 | while (p < adjusted_endp | |
fc9a17bc | 616 | && ! CHAR_BYTE8_HEAD_P (*p) |
0168c3d8 KH |
617 | && (n = MULTIBYTE_LENGTH_NO_CHECK (p)) > 0) |
618 | p += n, chars++; | |
619 | } | |
fc9a17bc KH |
620 | while (p < endp |
621 | && ! CHAR_BYTE8_HEAD_P (*p) | |
622 | && (n = MULTIBYTE_LENGTH (p, endp)) > 0) | |
0168c3d8 KH |
623 | p += n, chars++; |
624 | if (nchars) | |
625 | *nchars = chars; | |
626 | if (p == endp) | |
627 | return nbytes; | |
628 | ||
629 | to = p; | |
630 | nbytes = endp - p; | |
631 | endp = str + len; | |
72af86bd | 632 | memmove (endp - nbytes, p, nbytes); |
0168c3d8 KH |
633 | p = endp - nbytes; |
634 | ||
635 | if (nbytes >= MAX_MULTIBYTE_LENGTH) | |
636 | { | |
637 | unsigned char *adjusted_endp = endp - MAX_MULTIBYTE_LENGTH; | |
638 | while (p < adjusted_endp) | |
639 | { | |
fc9a17bc KH |
640 | if (! CHAR_BYTE8_HEAD_P (*p) |
641 | && (n = MULTIBYTE_LENGTH_NO_CHECK (p)) > 0) | |
0168c3d8 KH |
642 | { |
643 | while (n--) | |
644 | *to++ = *p++; | |
645 | } | |
646 | else | |
647 | { | |
648 | int c = *p++; | |
649 | c = BYTE8_TO_CHAR (c); | |
650 | to += CHAR_STRING (c, to); | |
651 | } | |
652 | } | |
653 | chars++; | |
654 | } | |
655 | while (p < endp) | |
656 | { | |
fc9a17bc KH |
657 | if (! CHAR_BYTE8_HEAD_P (*p) |
658 | && (n = MULTIBYTE_LENGTH (p, endp)) > 0) | |
0168c3d8 KH |
659 | { |
660 | while (n--) | |
661 | *to++ = *p++; | |
8f924df7 | 662 | } |
0168c3d8 KH |
663 | else |
664 | { | |
665 | int c = *p++; | |
666 | c = BYTE8_TO_CHAR (c); | |
667 | to += CHAR_STRING (c, to); | |
668 | } | |
669 | chars++; | |
670 | } | |
671 | if (nchars) | |
672 | *nchars = chars; | |
673 | return (to - str); | |
674 | } | |
675 | ||
676 | /* Parse unibyte string at STR of LEN bytes, and return the number of | |
677 | bytes it may ocupy when converted to multibyte string by | |
678 | `str_to_multibyte'. */ | |
679 | ||
14162469 EZ |
680 | EMACS_INT |
681 | parse_str_to_multibyte (const unsigned char *str, EMACS_INT len) | |
0168c3d8 | 682 | { |
eec47d6b | 683 | const unsigned char *endp = str + len; |
14162469 | 684 | EMACS_INT bytes; |
0168c3d8 KH |
685 | |
686 | for (bytes = 0; str < endp; str++) | |
687 | bytes += (*str < 0x80) ? 1 : 2; | |
688 | return bytes; | |
689 | } | |
690 | ||
691 | ||
692 | /* Convert unibyte text at STR of NBYTES bytes to a multibyte text | |
693 | that contains the same single-byte characters. It actually | |
694 | converts all 8-bit characters to multibyte forms. It is assured | |
695 | that we can use LEN bytes at STR as a work area and that is | |
696 | enough. */ | |
697 | ||
14162469 EZ |
698 | EMACS_INT |
699 | str_to_multibyte (unsigned char *str, EMACS_INT len, EMACS_INT bytes) | |
0168c3d8 KH |
700 | { |
701 | unsigned char *p = str, *endp = str + bytes; | |
702 | unsigned char *to; | |
703 | ||
704 | while (p < endp && *p < 0x80) p++; | |
705 | if (p == endp) | |
706 | return bytes; | |
707 | to = p; | |
708 | bytes = endp - p; | |
709 | endp = str + len; | |
72af86bd | 710 | memmove (endp - bytes, p, bytes); |
0168c3d8 | 711 | p = endp - bytes; |
8f924df7 | 712 | while (p < endp) |
0168c3d8 KH |
713 | { |
714 | int c = *p++; | |
715 | ||
716 | if (c >= 0x80) | |
717 | c = BYTE8_TO_CHAR (c); | |
718 | to += CHAR_STRING (c, to); | |
719 | } | |
720 | return (to - str); | |
721 | } | |
722 | ||
723 | /* Arrange multibyte text at STR of LEN bytes as a unibyte text. It | |
724 | actually converts characters in the range 0x80..0xFF to | |
725 | unibyte. */ | |
726 | ||
14162469 EZ |
727 | EMACS_INT |
728 | str_as_unibyte (unsigned char *str, EMACS_INT bytes) | |
0168c3d8 | 729 | { |
15843e6f KH |
730 | const unsigned char *p = str, *endp = str + bytes; |
731 | unsigned char *to; | |
0168c3d8 KH |
732 | int c, len; |
733 | ||
734 | while (p < endp) | |
735 | { | |
736 | c = *p; | |
737 | len = BYTES_BY_CHAR_HEAD (c); | |
738 | if (CHAR_BYTE8_HEAD_P (c)) | |
739 | break; | |
740 | p += len; | |
741 | } | |
15843e6f | 742 | to = str + (p - str); |
8f924df7 | 743 | while (p < endp) |
0168c3d8 KH |
744 | { |
745 | c = *p; | |
746 | len = BYTES_BY_CHAR_HEAD (c); | |
747 | if (CHAR_BYTE8_HEAD_P (c)) | |
748 | { | |
749 | c = STRING_CHAR_ADVANCE (p); | |
750 | *to++ = CHAR_TO_BYTE8 (c); | |
751 | } | |
752 | else | |
753 | { | |
754 | while (len--) *to++ = *p++; | |
755 | } | |
756 | } | |
757 | return (to - str); | |
758 | } | |
759 | ||
4aa40bb8 KH |
760 | /* Convert eight-bit chars in SRC (in multibyte form) to the |
761 | corresponding byte and store in DST. CHARS is the number of | |
762 | characters in SRC. The value is the number of bytes stored in DST. | |
763 | Usually, the value is the same as CHARS, but is less than it if SRC | |
764 | contains a non-ASCII, non-eight-bit characater. If ACCEPT_LATIN_1 | |
765 | is nonzero, a Latin-1 character is accepted and converted to a byte | |
f27f70ec KH |
766 | of that character code. |
767 | Note: Currently the arg ACCEPT_LATIN_1 is not used. */ | |
4aa40bb8 KH |
768 | |
769 | EMACS_INT | |
971de7fb | 770 | str_to_unibyte (const unsigned char *src, unsigned char *dst, EMACS_INT chars, int accept_latin_1) |
4aa40bb8 KH |
771 | { |
772 | EMACS_INT i; | |
773 | ||
774 | for (i = 0; i < chars; i++) | |
775 | { | |
776 | int c = STRING_CHAR_ADVANCE (src); | |
777 | ||
778 | if (CHAR_BYTE8_P (c)) | |
779 | c = CHAR_TO_BYTE8 (c); | |
780 | else if (! ASCII_CHAR_P (c) | |
781 | && (! accept_latin_1 || c >= 0x100)) | |
782 | return i; | |
783 | *dst++ = c; | |
784 | } | |
785 | return i; | |
786 | } | |
787 | ||
788 | ||
14162469 | 789 | EMACS_INT |
971de7fb | 790 | string_count_byte8 (Lisp_Object string) |
0168c3d8 KH |
791 | { |
792 | int multibyte = STRING_MULTIBYTE (string); | |
14162469 | 793 | EMACS_INT nbytes = SBYTES (string); |
8f924df7 | 794 | unsigned char *p = SDATA (string); |
0168c3d8 | 795 | unsigned char *pend = p + nbytes; |
14162469 | 796 | EMACS_INT count = 0; |
0168c3d8 KH |
797 | int c, len; |
798 | ||
799 | if (multibyte) | |
800 | while (p < pend) | |
801 | { | |
802 | c = *p; | |
803 | len = BYTES_BY_CHAR_HEAD (c); | |
804 | ||
805 | if (CHAR_BYTE8_HEAD_P (c)) | |
806 | count++; | |
807 | p += len; | |
808 | } | |
809 | else | |
810 | while (p < pend) | |
811 | { | |
812 | if (*p++ >= 0x80) | |
813 | count++; | |
814 | } | |
815 | return count; | |
816 | } | |
817 | ||
818 | ||
819 | Lisp_Object | |
971de7fb | 820 | string_escape_byte8 (Lisp_Object string) |
0168c3d8 | 821 | { |
14162469 EZ |
822 | EMACS_INT nchars = SCHARS (string); |
823 | EMACS_INT nbytes = SBYTES (string); | |
0168c3d8 | 824 | int multibyte = STRING_MULTIBYTE (string); |
14162469 | 825 | EMACS_INT byte8_count; |
15843e6f KH |
826 | const unsigned char *src, *src_end; |
827 | unsigned char *dst; | |
0168c3d8 KH |
828 | Lisp_Object val; |
829 | int c, len; | |
830 | ||
831 | if (multibyte && nchars == nbytes) | |
832 | return string; | |
833 | ||
834 | byte8_count = string_count_byte8 (string); | |
835 | ||
836 | if (byte8_count == 0) | |
837 | return string; | |
838 | ||
839 | if (multibyte) | |
14162469 EZ |
840 | { |
841 | if ((MOST_POSITIVE_FIXNUM - nchars) / 3 < byte8_count | |
842 | || (MOST_POSITIVE_FIXNUM - nbytes) / 2 < byte8_count) | |
843 | error ("Maximum string size exceeded"); | |
844 | ||
845 | /* Convert 2-byte sequence of byte8 chars to 4-byte octal. */ | |
846 | val = make_uninit_multibyte_string (nchars + byte8_count * 3, | |
847 | nbytes + byte8_count * 2); | |
848 | } | |
0168c3d8 | 849 | else |
14162469 EZ |
850 | { |
851 | if ((MOST_POSITIVE_FIXNUM - nchars) / 3 < byte8_count) | |
852 | error ("Maximum string size exceeded"); | |
853 | /* Convert 1-byte sequence of byte8 chars to 4-byte octal. */ | |
854 | val = make_uninit_string (nbytes + byte8_count * 3); | |
855 | } | |
0168c3d8 | 856 | |
8f924df7 | 857 | src = SDATA (string); |
0168c3d8 | 858 | src_end = src + nbytes; |
8f924df7 | 859 | dst = SDATA (val); |
0168c3d8 KH |
860 | if (multibyte) |
861 | while (src < src_end) | |
862 | { | |
863 | c = *src; | |
864 | len = BYTES_BY_CHAR_HEAD (c); | |
865 | ||
866 | if (CHAR_BYTE8_HEAD_P (c)) | |
867 | { | |
868 | c = STRING_CHAR_ADVANCE (src); | |
869 | c = CHAR_TO_BYTE8 (c); | |
1889b238 | 870 | sprintf ((char *) dst, "\\%03o", c); |
0168c3d8 KH |
871 | dst += 4; |
872 | } | |
873 | else | |
874 | while (len--) *dst++ = *src++; | |
875 | } | |
876 | else | |
877 | while (src < src_end) | |
878 | { | |
879 | c = *src++; | |
880 | if (c >= 0x80) | |
881 | { | |
1889b238 | 882 | sprintf ((char *) dst, "\\%03o", c); |
0168c3d8 KH |
883 | dst += 4; |
884 | } | |
885 | else | |
886 | *dst++ = c; | |
887 | } | |
888 | return val; | |
889 | } | |
890 | ||
891 | \f | |
8f924df7 | 892 | DEFUN ("string", Fstring, Sstring, 0, MANY, 0, |
0168c3d8 | 893 | doc: /* |
d2e83296 DL |
894 | Concatenate all the argument characters and make the result a string. |
895 | usage: (string &rest CHARACTERS) */) | |
5842a27b | 896 | (int n, Lisp_Object *args) |
0168c3d8 | 897 | { |
754790b6 CY |
898 | int i, c; |
899 | unsigned char *buf, *p; | |
900 | Lisp_Object str; | |
901 | USE_SAFE_ALLOCA; | |
902 | ||
903 | SAFE_ALLOCA (buf, unsigned char *, MAX_MULTIBYTE_LENGTH * n); | |
904 | p = buf; | |
0168c3d8 KH |
905 | |
906 | for (i = 0; i < n; i++) | |
907 | { | |
908 | CHECK_CHARACTER (args[i]); | |
909 | c = XINT (args[i]); | |
910 | p += CHAR_STRING (c, p); | |
911 | } | |
912 | ||
754790b6 CY |
913 | str = make_string_from_bytes ((char *) buf, n, p - buf); |
914 | SAFE_FREE (); | |
915 | return str; | |
0168c3d8 KH |
916 | } |
917 | ||
70b4969d | 918 | DEFUN ("unibyte-string", Funibyte_string, Sunibyte_string, 0, MANY, 0, |
87d6f965 KH |
919 | doc: /* Concatenate all the argument bytes and make the result a unibyte string. |
920 | usage: (unibyte-string &rest BYTES) */) | |
5842a27b | 921 | (int n, Lisp_Object *args) |
70b4969d | 922 | { |
754790b6 CY |
923 | int i, c; |
924 | unsigned char *buf, *p; | |
925 | Lisp_Object str; | |
926 | USE_SAFE_ALLOCA; | |
927 | ||
928 | SAFE_ALLOCA (buf, unsigned char *, n); | |
929 | p = buf; | |
70b4969d KH |
930 | |
931 | for (i = 0; i < n; i++) | |
932 | { | |
933 | CHECK_NATNUM (args[i]); | |
934 | c = XFASTINT (args[i]); | |
935 | if (c >= 256) | |
936 | args_out_of_range_3 (args[i], make_number (0), make_number (255)); | |
937 | *p++ = c; | |
938 | } | |
939 | ||
754790b6 CY |
940 | str = make_string_from_bytes ((char *) buf, n, p - buf); |
941 | SAFE_FREE (); | |
942 | return str; | |
70b4969d KH |
943 | } |
944 | ||
c73ae4ae | 945 | DEFUN ("char-resolve-modifiers", Fchar_resolve_modifiers, |
d0363d44 KH |
946 | Schar_resolve_modifiers, 1, 1, 0, |
947 | doc: /* Resolve modifiers in the character CHAR. | |
948 | The value is a character with modifiers resolved into the character | |
949 | code. Unresolved modifiers are kept in the value. | |
c73ae4ae | 950 | usage: (char-resolve-modifiers CHAR) */) |
5842a27b | 951 | (Lisp_Object character) |
d0363d44 KH |
952 | { |
953 | int c; | |
954 | ||
955 | CHECK_NUMBER (character); | |
956 | c = XINT (character); | |
957 | return make_number (char_resolve_modifier_mask (c)); | |
958 | } | |
959 | ||
ee107a89 KH |
960 | DEFUN ("get-byte", Fget_byte, Sget_byte, 0, 2, 0, |
961 | doc: /* Return a byte value of a character at point. | |
962 | Optional 1st arg POSITION, if non-nil, is a position of a character to get | |
963 | a byte value. | |
964 | Optional 2nd arg STRING, if non-nil, is a string of which first | |
965 | character is a target to get a byte value. In this case, POSITION, if | |
966 | non-nil, is an index of a target character in the string. | |
967 | ||
968 | If the current buffer (or STRING) is multibyte, and the target | |
969 | character is not ASCII nor 8-bit character, an error is signalled. */) | |
5842a27b | 970 | (Lisp_Object position, Lisp_Object string) |
ee107a89 KH |
971 | { |
972 | int c; | |
973 | EMACS_INT pos; | |
974 | unsigned char *p; | |
975 | ||
976 | if (NILP (string)) | |
977 | { | |
978 | if (NILP (position)) | |
979 | { | |
980 | p = PT_ADDR; | |
4d8e170e | 981 | } |
ee107a89 KH |
982 | else |
983 | { | |
984 | CHECK_NUMBER_COERCE_MARKER (position); | |
985 | if (XINT (position) < BEGV || XINT (position) >= ZV) | |
986 | args_out_of_range_3 (position, make_number (BEGV), make_number (ZV)); | |
987 | pos = XFASTINT (position); | |
988 | p = CHAR_POS_ADDR (pos); | |
989 | } | |
d5998e03 KH |
990 | if (NILP (current_buffer->enable_multibyte_characters)) |
991 | return make_number (*p); | |
ee107a89 KH |
992 | } |
993 | else | |
994 | { | |
995 | CHECK_STRING (string); | |
996 | if (NILP (position)) | |
997 | { | |
998 | p = SDATA (string); | |
999 | } | |
1000 | else | |
1001 | { | |
1002 | CHECK_NATNUM (position); | |
1003 | if (XINT (position) >= SCHARS (string)) | |
1004 | args_out_of_range (string, position); | |
1005 | pos = XFASTINT (position); | |
1006 | p = SDATA (string) + string_char_to_byte (string, pos); | |
1007 | } | |
d5998e03 KH |
1008 | if (! STRING_MULTIBYTE (string)) |
1009 | return make_number (*p); | |
ee107a89 | 1010 | } |
62a6e103 | 1011 | c = STRING_CHAR (p); |
ee107a89 KH |
1012 | if (CHAR_BYTE8_P (c)) |
1013 | c = CHAR_TO_BYTE8 (c); | |
1014 | else if (! ASCII_CHAR_P (c)) | |
1015 | error ("Not an ASCII nor an 8-bit character: %d", c); | |
1016 | return make_number (c); | |
1017 | } | |
1018 | ||
1019 | ||
0168c3d8 | 1020 | void |
971de7fb | 1021 | init_character_once (void) |
0168c3d8 KH |
1022 | { |
1023 | } | |
1024 | ||
1025 | #ifdef emacs | |
1026 | ||
1027 | void | |
971de7fb | 1028 | syms_of_character (void) |
0168c3d8 KH |
1029 | { |
1030 | DEFSYM (Qcharacterp, "characterp"); | |
1031 | DEFSYM (Qauto_fill_chars, "auto-fill-chars"); | |
1032 | ||
1033 | staticpro (&Vchar_unify_table); | |
1034 | Vchar_unify_table = Qnil; | |
1035 | ||
1036 | defsubr (&Smax_char); | |
1037 | defsubr (&Scharacterp); | |
1038 | defsubr (&Sunibyte_char_to_multibyte); | |
1039 | defsubr (&Smultibyte_char_to_unibyte); | |
0168c3d8 KH |
1040 | defsubr (&Schar_width); |
1041 | defsubr (&Sstring_width); | |
1042 | defsubr (&Schar_direction); | |
0168c3d8 | 1043 | defsubr (&Sstring); |
70b4969d | 1044 | defsubr (&Sunibyte_string); |
d0363d44 | 1045 | defsubr (&Schar_resolve_modifiers); |
ee107a89 | 1046 | defsubr (&Sget_byte); |
0168c3d8 | 1047 | |
29208e82 | 1048 | DEFVAR_LISP ("translation-table-vector", Vtranslation_table_vector, |
0168c3d8 | 1049 | doc: /* |
68978cf0 DL |
1050 | Vector recording all translation tables ever defined. |
1051 | Each element is a pair (SYMBOL . TABLE) relating the table to the | |
1052 | symbol naming it. The ID of a translation table is an index into this vector. */); | |
0168c3d8 KH |
1053 | Vtranslation_table_vector = Fmake_vector (make_number (16), Qnil); |
1054 | ||
29208e82 | 1055 | DEFVAR_LISP ("auto-fill-chars", Vauto_fill_chars, |
0168c3d8 KH |
1056 | doc: /* |
1057 | A char-table for characters which invoke auto-filling. | |
1058 | Such characters have value t in this table. */); | |
1059 | Vauto_fill_chars = Fmake_char_table (Qauto_fill_chars, Qnil); | |
6cc0e1ca DL |
1060 | CHAR_TABLE_SET (Vauto_fill_chars, ' ', Qt); |
1061 | CHAR_TABLE_SET (Vauto_fill_chars, '\n', Qt); | |
0168c3d8 | 1062 | |
29208e82 | 1063 | DEFVAR_LISP ("char-width-table", Vchar_width_table, |
0168c3d8 KH |
1064 | doc: /* |
1065 | A char-table for width (columns) of each character. */); | |
1066 | Vchar_width_table = Fmake_char_table (Qnil, make_number (1)); | |
be8b50bc KH |
1067 | char_table_set_range (Vchar_width_table, 0x80, 0x9F, make_number (4)); |
1068 | char_table_set_range (Vchar_width_table, MAX_5_BYTE_CHAR + 1, MAX_CHAR, | |
1069 | make_number (4)); | |
0168c3d8 | 1070 | |
29208e82 | 1071 | DEFVAR_LISP ("char-direction-table", Vchar_direction_table, |
0168c3d8 KH |
1072 | doc: /* A char-table for direction of each character. */); |
1073 | Vchar_direction_table = Fmake_char_table (Qnil, make_number (1)); | |
1074 | ||
29208e82 | 1075 | DEFVAR_LISP ("printable-chars", Vprintable_chars, |
0168c3d8 | 1076 | doc: /* A char-table for each printable character. */); |
db6d4189 | 1077 | Vprintable_chars = Fmake_char_table (Qnil, Qnil); |
67dde660 KH |
1078 | Fset_char_table_range (Vprintable_chars, |
1079 | Fcons (make_number (32), make_number (126)), Qt); | |
1080 | Fset_char_table_range (Vprintable_chars, | |
1081 | Fcons (make_number (160), | |
1082 | make_number (MAX_5_BYTE_CHAR)), Qt); | |
15843e6f | 1083 | |
29208e82 | 1084 | DEFVAR_LISP ("char-script-table", Vchar_script_table, |
c57f3328 KH |
1085 | doc: /* Char table of script symbols. |
1086 | It has one extra slot whose value is a list of script symbols. */); | |
1087 | ||
1088 | /* Intern this now in case it isn't already done. | |
1089 | Setting this variable twice is harmless. | |
1090 | But don't staticpro it here--that is done in alloc.c. */ | |
d67b4f80 | 1091 | Qchar_table_extra_slots = intern_c_string ("char-table-extra-slots"); |
c57f3328 KH |
1092 | DEFSYM (Qchar_script_table, "char-script-table"); |
1093 | Fput (Qchar_script_table, Qchar_table_extra_slots, make_number (1)); | |
1094 | Vchar_script_table = Fmake_char_table (Qchar_script_table, Qnil); | |
c7e14352 | 1095 | |
29208e82 | 1096 | DEFVAR_LISP ("script-representative-chars", Vscript_representative_chars, |
c3bb7671 | 1097 | doc: /* Alist of scripts vs the representative characters. |
f4427a54 | 1098 | Each element is a cons (SCRIPT . CHARS). |
4d8e170e | 1099 | SCRIPT is a symbol representing a script or a subgroup of a script. |
c3bb7671 | 1100 | CHARS is a list or a vector of characters. |
472a4dc9 | 1101 | If it is a list, all characters in the list are necessary for supporting SCRIPT. |
c3bb7671 KH |
1102 | If it is a vector, one of the characters in the vector is necessary. |
1103 | This variable is used to find a font for a specific script. */); | |
c7e14352 | 1104 | Vscript_representative_chars = Qnil; |
a3cbb631 | 1105 | |
29208e82 | 1106 | DEFVAR_LISP ("unicode-category-table", Vunicode_category_table, |
a3cbb631 | 1107 | doc: /* Char table of Unicode's "General Category". |
472a4dc9 JB |
1108 | All Unicode characters have one of the following values (symbol): |
1109 | Lu, Ll, Lt, Lm, Lo, Mn, Mc, Me, Nd, Nl, No, Pc, Pd, Ps, Pe, Pi, Pf, Po, | |
a3cbb631 KH |
1110 | Sm, Sc, Sk, So, Zs, Zl, Zp, Cc, Cf, Cs, Co, Cn |
1111 | See The Unicode Standard for the meaning of those values. */); | |
1112 | /* The correct char-table is setup in characters.el. */ | |
1113 | Vunicode_category_table = Qnil; | |
0168c3d8 KH |
1114 | } |
1115 | ||
1116 | #endif /* emacs */ |