Commit | Line | Data |
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75c8c592 | 1 | /* Basic multilingual character support. |
35e623fb | 2 | Copyright (C) 1995, 1997, 1998 Electrotechnical Laboratory, JAPAN. |
75c8c592 | 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 | /* At first, see the document in `charset.h' to understand the code in | |
23 | this file. */ | |
24 | ||
25 | #include <stdio.h> | |
26 | ||
27 | #ifdef emacs | |
28 | ||
29 | #include <sys/types.h> | |
30 | #include <config.h> | |
31 | #include "lisp.h" | |
32 | #include "buffer.h" | |
33 | #include "charset.h" | |
34 | #include "coding.h" | |
fc6b09bf | 35 | #include "disptab.h" |
4ed46869 KH |
36 | |
37 | #else /* not emacs */ | |
38 | ||
39 | #include "mulelib.h" | |
40 | ||
41 | #endif /* emacs */ | |
42 | ||
43 | Lisp_Object Qcharset, Qascii, Qcomposition; | |
44 | ||
45 | /* Declaration of special leading-codes. */ | |
46 | int leading_code_composition; /* for composite characters */ | |
47 | int leading_code_private_11; /* for private DIMENSION1 of 1-column */ | |
48 | int leading_code_private_12; /* for private DIMENSION1 of 2-column */ | |
49 | int leading_code_private_21; /* for private DIMENSION2 of 1-column */ | |
50 | int leading_code_private_22; /* for private DIMENSION2 of 2-column */ | |
51 | ||
52 | /* Declaration of special charsets. */ | |
53 | int charset_ascii; /* ASCII */ | |
54 | int charset_composition; /* for a composite character */ | |
55 | int charset_latin_iso8859_1; /* ISO8859-1 (Latin-1) */ | |
56 | int charset_jisx0208_1978; /* JISX0208.1978 (Japanese Kanji old set) */ | |
57 | int charset_jisx0208; /* JISX0208.1983 (Japanese Kanji) */ | |
58 | int charset_katakana_jisx0201; /* JISX0201.Kana (Japanese Katakana) */ | |
59 | int charset_latin_jisx0201; /* JISX0201.Roman (Japanese Roman) */ | |
60 | int charset_big5_1; /* Big5 Level 1 (Chinese Traditional) */ | |
61 | int charset_big5_2; /* Big5 Level 2 (Chinese Traditional) */ | |
62 | ||
b0e3cf2b KH |
63 | int min_composite_char; |
64 | ||
4ed46869 KH |
65 | Lisp_Object Qcharset_table; |
66 | ||
67 | /* A char-table containing information of each character set. */ | |
68 | Lisp_Object Vcharset_table; | |
69 | ||
70 | /* A vector of charset symbol indexed by charset-id. This is used | |
71 | only for returning charset symbol from C functions. */ | |
72 | Lisp_Object Vcharset_symbol_table; | |
73 | ||
74 | /* A list of charset symbols ever defined. */ | |
75 | Lisp_Object Vcharset_list; | |
76 | ||
b0e3cf2b KH |
77 | /* Vector of unification table ever defined. |
78 | An ID of a unification table is an index of this vector. */ | |
79 | Lisp_Object Vcharacter_unification_table_vector; | |
80 | ||
4ed46869 KH |
81 | /* Tables used by macros BYTES_BY_CHAR_HEAD and WIDTH_BY_CHAR_HEAD. */ |
82 | int bytes_by_char_head[256]; | |
83 | int width_by_char_head[256]; | |
84 | ||
85 | /* Mapping table from ISO2022's charset (specified by DIMENSION, | |
86 | CHARS, and FINAL-CHAR) to Emacs' charset. */ | |
87 | int iso_charset_table[2][2][128]; | |
88 | ||
513ee442 KH |
89 | /* Table of pointers to the structure `cmpchar_info' indexed by |
90 | CMPCHAR-ID. */ | |
91 | struct cmpchar_info **cmpchar_table; | |
92 | /* The current size of `cmpchar_table'. */ | |
93 | static int cmpchar_table_size; | |
94 | /* Number of the current composite characters. */ | |
95 | int n_cmpchars; | |
96 | ||
4ed46869 KH |
97 | /* Variables used locally in the macro FETCH_MULTIBYTE_CHAR. */ |
98 | unsigned char *_fetch_multibyte_char_p; | |
99 | int _fetch_multibyte_char_len; | |
100 | ||
35e623fb RS |
101 | /* Offset to add to a non-ASCII value when inserting it. */ |
102 | int nonascii_insert_offset; | |
103 | ||
046b1f03 RS |
104 | #define min(X, Y) ((X) < (Y) ? (X) : (Y)) |
105 | #define max(X, Y) ((X) > (Y) ? (X) : (Y)) | |
106 | \f | |
4ed46869 KH |
107 | /* Set STR a pointer to the multi-byte form of the character C. If C |
108 | is not a composite character, the multi-byte form is set in WORKBUF | |
109 | and STR points WORKBUF. The caller should allocate at least 4-byte | |
110 | area at WORKBUF in advance. Returns the length of the multi-byte | |
bd4c6dd0 KH |
111 | form. If C is an invalid character to have a multi-byte form, |
112 | signal an error. | |
4ed46869 KH |
113 | |
114 | Use macro `CHAR_STRING (C, WORKBUF, STR)' instead of calling this | |
115 | function directly if C can be an ASCII character. */ | |
116 | ||
117 | int | |
118 | non_ascii_char_to_string (c, workbuf, str) | |
119 | int c; | |
120 | unsigned char *workbuf, **str; | |
121 | { | |
6dc0722d | 122 | int charset, c1, c2; |
4ed46869 KH |
123 | |
124 | if (COMPOSITE_CHAR_P (c)) | |
125 | { | |
126 | int cmpchar_id = COMPOSITE_CHAR_ID (c); | |
127 | ||
128 | if (cmpchar_id < n_cmpchars) | |
129 | { | |
130 | *str = cmpchar_table[cmpchar_id]->data; | |
131 | return cmpchar_table[cmpchar_id]->len; | |
132 | } | |
133 | else | |
134 | { | |
d16a4fc6 | 135 | error ("Invalid character: %d", c); |
4ed46869 KH |
136 | } |
137 | } | |
138 | ||
139 | SPLIT_NON_ASCII_CHAR (c, charset, c1, c2); | |
bd4c6dd0 KH |
140 | if (!charset |
141 | || ! CHARSET_DEFINED_P (charset) | |
142 | || c1 >= 0 && c1 < 32 | |
143 | || c2 >= 0 && c2 < 32) | |
d16a4fc6 | 144 | error ("Invalid character: %d", c); |
4ed46869 KH |
145 | |
146 | *str = workbuf; | |
147 | *workbuf++ = CHARSET_LEADING_CODE_BASE (charset); | |
148 | if (*workbuf = CHARSET_LEADING_CODE_EXT (charset)) | |
149 | workbuf++; | |
150 | *workbuf++ = c1 | 0x80; | |
6dc0722d | 151 | if (c2 >= 0) |
4ed46869 KH |
152 | *workbuf++ = c2 | 0x80; |
153 | ||
154 | return (workbuf - *str); | |
155 | } | |
156 | ||
157 | /* Return a non-ASCII character of which multi-byte form is at STR of | |
158 | length LEN. If ACTUAL_LEN is not NULL, the actual length of the | |
159 | character is set to the address ACTUAL_LEN. | |
160 | ||
161 | Use macro `STRING_CHAR (STR, LEN)' instead of calling this function | |
162 | directly if STR can hold an ASCII character. */ | |
163 | ||
164 | string_to_non_ascii_char (str, len, actual_len) | |
165 | unsigned char *str; | |
166 | int len, *actual_len; | |
167 | { | |
168 | int charset; | |
169 | unsigned char c1, c2; | |
170 | register int c; | |
171 | ||
172 | if (SPLIT_STRING (str, len, charset, c1, c2) == CHARSET_ASCII) | |
173 | { | |
174 | if (actual_len) | |
175 | *actual_len = 1; | |
176 | return (int) *str; | |
177 | } | |
178 | ||
179 | c = MAKE_NON_ASCII_CHAR (charset, c1, c2); | |
180 | ||
181 | if (actual_len) | |
182 | *actual_len = (charset == CHARSET_COMPOSITION | |
183 | ? cmpchar_table[COMPOSITE_CHAR_ID (c)]->len | |
184 | : BYTES_BY_CHAR_HEAD (*str)); | |
185 | return c; | |
186 | } | |
187 | ||
188 | /* Return the length of the multi-byte form at string STR of length LEN. */ | |
189 | int | |
190 | multibyte_form_length (str, len) | |
191 | unsigned char *str; | |
192 | int len; | |
193 | { | |
194 | int charset; | |
195 | unsigned char c1, c2; | |
196 | register int c; | |
197 | ||
198 | if (SPLIT_STRING (str, len, charset, c1, c2) == CHARSET_ASCII) | |
199 | return 1; | |
200 | ||
201 | return (charset == CHARSET_COMPOSITION | |
202 | ? cmpchar_table[(c1 << 7) | c2]->len | |
203 | : BYTES_BY_CHAR_HEAD (*str)); | |
204 | } | |
205 | ||
206 | /* Check if string STR of length LEN contains valid multi-byte form of | |
207 | a character. If valid, charset and position codes of the character | |
208 | is set at *CHARSET, *C1, and *C2, and return 0. If not valid, | |
209 | return -1. This should be used only in the macro SPLIT_STRING | |
210 | which checks range of STR in advance. */ | |
211 | ||
212 | split_non_ascii_string (str, len, charset, c1, c2) | |
213 | register unsigned char *str, *c1, *c2; | |
214 | register int len, *charset; | |
215 | { | |
216 | register unsigned int cs = *str++; | |
217 | ||
218 | if (cs == LEADING_CODE_COMPOSITION) | |
219 | { | |
220 | int cmpchar_id = str_cmpchar_id (str - 1, len); | |
221 | ||
222 | if (cmpchar_id < 0) | |
223 | return -1; | |
224 | *charset = cs, *c1 = cmpchar_id >> 7, *c2 = cmpchar_id & 0x7F; | |
225 | } | |
226 | else if ((cs < LEADING_CODE_PRIVATE_11 || (cs = *str++) >= 0xA0) | |
227 | && CHARSET_DEFINED_P (cs)) | |
228 | { | |
229 | *charset = cs; | |
230 | if (*str < 0xA0) | |
231 | return -1; | |
232 | *c1 = (*str++) & 0x7F; | |
233 | if (CHARSET_DIMENSION (cs) == 2) | |
234 | { | |
235 | if (*str < 0xA0) | |
236 | return -1; | |
237 | *c2 = (*str++) & 0x7F; | |
238 | } | |
239 | } | |
240 | else | |
241 | return -1; | |
242 | return 0; | |
243 | } | |
244 | ||
23d2a7f1 KH |
245 | /* Return a character unified with C (or a character made of CHARSET, |
246 | C1, and C2) in unification table TABLE. If no unification is found | |
247 | in TABLE, return C. */ | |
248 | unify_char (table, c, charset, c1, c2) | |
249 | Lisp_Object table; | |
250 | int c, charset, c1, c2; | |
251 | { | |
252 | Lisp_Object ch; | |
253 | int alt_charset, alt_c1, alt_c2, dimension; | |
254 | ||
255 | if (c < 0) c = MAKE_CHAR (charset, c1, c2); | |
256 | if (!CHAR_TABLE_P (table) | |
257 | || (ch = Faref (table, make_number (c)), !INTEGERP (ch)) | |
258 | || XINT (ch) < 0) | |
259 | return c; | |
260 | ||
261 | SPLIT_CHAR (XFASTINT (ch), alt_charset, alt_c1, alt_c2); | |
262 | dimension = CHARSET_DIMENSION (alt_charset); | |
263 | if (dimension == 1 && alt_c1 > 0 || dimension == 2 && alt_c2 > 0) | |
264 | /* CH is not a generic character, just return it. */ | |
265 | return XFASTINT (ch); | |
266 | ||
267 | /* Since CH is a generic character, we must return a specific | |
268 | charater which has the same position codes as C from CH. */ | |
269 | if (charset < 0) | |
270 | SPLIT_CHAR (c, charset, c1, c2); | |
271 | if (dimension != CHARSET_DIMENSION (charset)) | |
272 | /* We can't make such a character because of dimension mismatch. */ | |
273 | return c; | |
23d2a7f1 KH |
274 | return MAKE_CHAR (alt_charset, c1, c2); |
275 | } | |
276 | ||
35e623fb RS |
277 | #define DEFAULT_NONASCII_INSERT_OFFSET 0x800 |
278 | ||
279 | /* Convert the unibyte character C to multibyte | |
280 | based on nonascii_insert_offset. Note that copy_text in insdel.c | |
281 | has similar code. */ | |
282 | ||
283 | int | |
284 | unibyte_char_to_multibyte (c) | |
285 | int c; | |
286 | { | |
287 | if (c >= 0200 && c < 0400) | |
288 | { | |
289 | if (nonascii_insert_offset > 0) | |
290 | c += nonascii_insert_offset; | |
291 | else | |
292 | c += DEFAULT_NONASCII_INSERT_OFFSET; | |
293 | } | |
294 | return c; | |
295 | } | |
296 | \f | |
4ed46869 KH |
297 | /* Update the table Vcharset_table with the given arguments (see the |
298 | document of `define-charset' for the meaning of each argument). | |
299 | Several other table contents are also updated. The caller should | |
300 | check the validity of CHARSET-ID and the remaining arguments in | |
301 | advance. */ | |
302 | ||
303 | void | |
304 | update_charset_table (charset_id, dimension, chars, width, direction, | |
305 | iso_final_char, iso_graphic_plane, | |
306 | short_name, long_name, description) | |
307 | Lisp_Object charset_id, dimension, chars, width, direction; | |
308 | Lisp_Object iso_final_char, iso_graphic_plane; | |
309 | Lisp_Object short_name, long_name, description; | |
310 | { | |
311 | int charset = XINT (charset_id); | |
312 | int bytes; | |
313 | unsigned char leading_code_base, leading_code_ext; | |
314 | ||
6dc0722d KH |
315 | if (NILP (CHARSET_TABLE_ENTRY (charset))) |
316 | CHARSET_TABLE_ENTRY (charset) | |
317 | = Fmake_vector (make_number (CHARSET_MAX_IDX), Qnil); | |
4ed46869 KH |
318 | |
319 | /* Get byte length of multibyte form, base leading-code, and | |
320 | extended leading-code of the charset. See the comment under the | |
321 | title "GENERAL NOTE on CHARACTER SET (CHARSET)" in charset.h. */ | |
322 | bytes = XINT (dimension); | |
323 | if (charset < MIN_CHARSET_PRIVATE_DIMENSION1) | |
324 | { | |
325 | /* Official charset, it doesn't have an extended leading-code. */ | |
326 | if (charset != CHARSET_ASCII) | |
327 | bytes += 1; /* For a base leading-code. */ | |
328 | leading_code_base = charset; | |
329 | leading_code_ext = 0; | |
330 | } | |
331 | else | |
332 | { | |
333 | /* Private charset. */ | |
334 | bytes += 2; /* For base and extended leading-codes. */ | |
335 | leading_code_base | |
336 | = (charset < LEADING_CODE_EXT_12 | |
337 | ? LEADING_CODE_PRIVATE_11 | |
338 | : (charset < LEADING_CODE_EXT_21 | |
339 | ? LEADING_CODE_PRIVATE_12 | |
340 | : (charset < LEADING_CODE_EXT_22 | |
341 | ? LEADING_CODE_PRIVATE_21 | |
342 | : LEADING_CODE_PRIVATE_22))); | |
343 | leading_code_ext = charset; | |
344 | } | |
345 | ||
346 | CHARSET_TABLE_INFO (charset, CHARSET_ID_IDX) = charset_id; | |
347 | CHARSET_TABLE_INFO (charset, CHARSET_BYTES_IDX) = make_number (bytes); | |
348 | CHARSET_TABLE_INFO (charset, CHARSET_DIMENSION_IDX) = dimension; | |
349 | CHARSET_TABLE_INFO (charset, CHARSET_CHARS_IDX) = chars; | |
350 | CHARSET_TABLE_INFO (charset, CHARSET_WIDTH_IDX) = width; | |
351 | CHARSET_TABLE_INFO (charset, CHARSET_DIRECTION_IDX) = direction; | |
352 | CHARSET_TABLE_INFO (charset, CHARSET_LEADING_CODE_BASE_IDX) | |
353 | = make_number (leading_code_base); | |
354 | CHARSET_TABLE_INFO (charset, CHARSET_LEADING_CODE_EXT_IDX) | |
355 | = make_number (leading_code_ext); | |
356 | CHARSET_TABLE_INFO (charset, CHARSET_ISO_FINAL_CHAR_IDX) = iso_final_char; | |
357 | CHARSET_TABLE_INFO (charset, CHARSET_ISO_GRAPHIC_PLANE_IDX) | |
358 | = iso_graphic_plane; | |
359 | CHARSET_TABLE_INFO (charset, CHARSET_SHORT_NAME_IDX) = short_name; | |
360 | CHARSET_TABLE_INFO (charset, CHARSET_LONG_NAME_IDX) = long_name; | |
361 | CHARSET_TABLE_INFO (charset, CHARSET_DESCRIPTION_IDX) = description; | |
362 | CHARSET_TABLE_INFO (charset, CHARSET_PLIST_IDX) = Qnil; | |
363 | ||
364 | { | |
365 | /* If we have already defined a charset which has the same | |
366 | DIMENSION, CHARS and ISO-FINAL-CHAR but the different | |
367 | DIRECTION, we must update the entry REVERSE-CHARSET of both | |
368 | charsets. If there's no such charset, the value of the entry | |
369 | is set to nil. */ | |
370 | int i; | |
371 | ||
513ee442 | 372 | for (i = 0; i <= MAX_CHARSET; i++) |
4ed46869 KH |
373 | if (!NILP (CHARSET_TABLE_ENTRY (i))) |
374 | { | |
375 | if (CHARSET_DIMENSION (i) == XINT (dimension) | |
376 | && CHARSET_CHARS (i) == XINT (chars) | |
377 | && CHARSET_ISO_FINAL_CHAR (i) == XINT (iso_final_char) | |
378 | && CHARSET_DIRECTION (i) != XINT (direction)) | |
379 | { | |
380 | CHARSET_TABLE_INFO (charset, CHARSET_REVERSE_CHARSET_IDX) | |
381 | = make_number (i); | |
382 | CHARSET_TABLE_INFO (i, CHARSET_REVERSE_CHARSET_IDX) = charset_id; | |
383 | break; | |
384 | } | |
385 | } | |
513ee442 | 386 | if (i > MAX_CHARSET) |
4ed46869 KH |
387 | /* No such a charset. */ |
388 | CHARSET_TABLE_INFO (charset, CHARSET_REVERSE_CHARSET_IDX) | |
389 | = make_number (-1); | |
390 | } | |
391 | ||
392 | if (charset != CHARSET_ASCII | |
393 | && charset < MIN_CHARSET_PRIVATE_DIMENSION1) | |
394 | { | |
395 | /* Update tables bytes_by_char_head and width_by_char_head. */ | |
396 | bytes_by_char_head[leading_code_base] = bytes; | |
397 | width_by_char_head[leading_code_base] = XINT (width); | |
398 | ||
399 | /* Update table emacs_code_class. */ | |
400 | emacs_code_class[charset] = (bytes == 2 | |
401 | ? EMACS_leading_code_2 | |
402 | : (bytes == 3 | |
403 | ? EMACS_leading_code_3 | |
404 | : EMACS_leading_code_4)); | |
405 | } | |
406 | ||
407 | /* Update table iso_charset_table. */ | |
408 | if (ISO_CHARSET_TABLE (dimension, chars, iso_final_char) < 0) | |
409 | ISO_CHARSET_TABLE (dimension, chars, iso_final_char) = charset; | |
410 | } | |
411 | ||
412 | #ifdef emacs | |
413 | ||
414 | /* Return charset id of CHARSET_SYMBOL, or return -1 if CHARSET_SYMBOL | |
415 | is invalid. */ | |
416 | int | |
417 | get_charset_id (charset_symbol) | |
418 | Lisp_Object charset_symbol; | |
419 | { | |
420 | Lisp_Object val; | |
421 | int charset; | |
422 | ||
423 | return ((SYMBOLP (charset_symbol) | |
424 | && (val = Fget (charset_symbol, Qcharset), VECTORP (val)) | |
425 | && (charset = XINT (XVECTOR (val)->contents[CHARSET_ID_IDX]), | |
426 | CHARSET_VALID_P (charset))) | |
427 | ? charset : -1); | |
428 | } | |
429 | ||
430 | /* Return an identification number for a new private charset of | |
431 | DIMENSION and WIDTH. If there's no more room for the new charset, | |
432 | return 0. */ | |
433 | Lisp_Object | |
434 | get_new_private_charset_id (dimension, width) | |
435 | int dimension, width; | |
436 | { | |
437 | int charset, from, to; | |
438 | ||
439 | if (dimension == 1) | |
440 | { | |
441 | if (width == 1) | |
442 | from = LEADING_CODE_EXT_11, to = LEADING_CODE_EXT_12; | |
443 | else | |
444 | from = LEADING_CODE_EXT_12, to = LEADING_CODE_EXT_21; | |
445 | } | |
446 | else | |
447 | { | |
448 | if (width == 1) | |
449 | from = LEADING_CODE_EXT_21, to = LEADING_CODE_EXT_22; | |
450 | else | |
b0e3cf2b | 451 | from = LEADING_CODE_EXT_22, to = LEADING_CODE_EXT_MAX + 1; |
4ed46869 KH |
452 | } |
453 | ||
454 | for (charset = from; charset < to; charset++) | |
455 | if (!CHARSET_DEFINED_P (charset)) break; | |
456 | ||
457 | return make_number (charset < to ? charset : 0); | |
458 | } | |
459 | ||
460 | DEFUN ("define-charset", Fdefine_charset, Sdefine_charset, 3, 3, 0, | |
461 | "Define CHARSET-ID as the identification number of CHARSET with INFO-VECTOR.\n\ | |
23d2a7f1 | 462 | If CHARSET-ID is nil, it is decided automatically, which means CHARSET is\n\ |
4ed46869 KH |
463 | treated as a private charset.\n\ |
464 | INFO-VECTOR is a vector of the format:\n\ | |
465 | [DIMENSION CHARS WIDTH DIRECTION ISO-FINAL-CHAR ISO-GRAPHIC-PLANE\n\ | |
466 | SHORT-NAME LONG-NAME DESCRIPTION]\n\ | |
467 | The meanings of each elements is as follows:\n\ | |
468 | DIMENSION (integer) is the number of bytes to represent a character: 1 or 2.\n\ | |
469 | CHARS (integer) is the number of characters in a dimension: 94 or 96.\n\ | |
470 | WIDTH (integer) is the number of columns a character in the charset\n\ | |
471 | occupies on the screen: one of 0, 1, and 2.\n\ | |
472 | \n\ | |
473 | DIRECTION (integer) is the rendering direction of characters in the\n\ | |
474 | charset when rendering. If 0, render from right to left, else\n\ | |
475 | render from left to right.\n\ | |
476 | \n\ | |
477 | ISO-FINAL-CHAR (character) is the final character of the\n\ | |
478 | corresponding ISO 2022 charset.\n\ | |
479 | \n\ | |
480 | ISO-GRAPHIC-PLANE (integer) is the graphic plane to be invoked\n\ | |
481 | while encoding to variants of ISO 2022 coding system, one of the\n\ | |
482 | following: 0/graphic-plane-left(GL), 1/graphic-plane-right(GR).\n\ | |
483 | \n\ | |
484 | SHORT-NAME (string) is the short name to refer to the charset.\n\ | |
485 | \n\ | |
486 | LONG-NAME (string) is the long name to refer to the charset.\n\ | |
487 | \n\ | |
488 | DESCRIPTION (string) is the description string of the charset.") | |
489 | (charset_id, charset_symbol, info_vector) | |
490 | Lisp_Object charset_id, charset_symbol, info_vector; | |
491 | { | |
492 | Lisp_Object *vec; | |
493 | ||
494 | if (!NILP (charset_id)) | |
495 | CHECK_NUMBER (charset_id, 0); | |
496 | CHECK_SYMBOL (charset_symbol, 1); | |
497 | CHECK_VECTOR (info_vector, 2); | |
498 | ||
499 | if (! NILP (charset_id)) | |
500 | { | |
501 | if (! CHARSET_VALID_P (XINT (charset_id))) | |
502 | error ("Invalid CHARSET: %d", XINT (charset_id)); | |
503 | else if (CHARSET_DEFINED_P (XINT (charset_id))) | |
504 | error ("Already defined charset: %d", XINT (charset_id)); | |
505 | } | |
506 | ||
507 | vec = XVECTOR (info_vector)->contents; | |
508 | if (XVECTOR (info_vector)->size != 9 | |
509 | || !INTEGERP (vec[0]) || !(XINT (vec[0]) == 1 || XINT (vec[0]) == 2) | |
510 | || !INTEGERP (vec[1]) || !(XINT (vec[1]) == 94 || XINT (vec[1]) == 96) | |
511 | || !INTEGERP (vec[2]) || !(XINT (vec[2]) == 1 || XINT (vec[2]) == 2) | |
512 | || !INTEGERP (vec[3]) || !(XINT (vec[3]) == 0 || XINT (vec[3]) == 1) | |
513 | || !INTEGERP (vec[4]) || !(XINT (vec[4]) >= '0' && XINT (vec[4]) <= '~') | |
514 | || !INTEGERP (vec[5]) || !(XINT (vec[5]) == 0 || XINT (vec[5]) == 1) | |
515 | || !STRINGP (vec[6]) | |
516 | || !STRINGP (vec[7]) | |
517 | || !STRINGP (vec[8])) | |
518 | error ("Invalid info-vector argument for defining charset %s", | |
519 | XSYMBOL (charset_symbol)->name->data); | |
520 | ||
521 | if (NILP (charset_id)) | |
522 | { | |
523 | charset_id = get_new_private_charset_id (XINT (vec[0]), XINT (vec[2])); | |
524 | if (XINT (charset_id) == 0) | |
525 | error ("There's no room for a new private charset %s", | |
526 | XSYMBOL (charset_symbol)->name->data); | |
527 | } | |
528 | ||
529 | update_charset_table (charset_id, vec[0], vec[1], vec[2], vec[3], | |
530 | vec[4], vec[5], vec[6], vec[7], vec[8]); | |
6dc0722d | 531 | Fput (charset_symbol, Qcharset, CHARSET_TABLE_ENTRY (XINT (charset_id))); |
4ed46869 KH |
532 | CHARSET_SYMBOL (XINT (charset_id)) = charset_symbol; |
533 | Vcharset_list = Fcons (charset_symbol, Vcharset_list); | |
534 | return Qnil; | |
535 | } | |
536 | ||
3fac5a51 KH |
537 | DEFUN ("get-unused-iso-final-char", Fget_unused_iso_final_char, |
538 | Sget_unused_iso_final_char, 2, 2, 0, | |
539 | "Return an unsed ISO's final char for a charset of DIMENISION and CHARS.\n\ | |
540 | DIMENSION is the number of bytes to represent a character: 1 or 2.\n\ | |
541 | CHARS is the number of characters in a dimension: 94 or 96.\n\ | |
542 | \n\ | |
543 | This final char is for private use, thus the range is `0' (48) .. `?' (63).\n\ | |
544 | If there's no unused final char for the specified kind of charset,\n\ | |
545 | return nil.") | |
546 | (dimension, chars) | |
547 | Lisp_Object dimension, chars; | |
548 | { | |
549 | int final_char; | |
550 | ||
551 | CHECK_NUMBER (dimension, 0); | |
552 | CHECK_NUMBER (chars, 1); | |
553 | if (XINT (dimension) != 1 && XINT (dimension) != 2) | |
554 | error ("Invalid charset dimension %d, it should be 1 or 2", | |
555 | XINT (dimension)); | |
556 | if (XINT (chars) != 94 && XINT (chars) != 96) | |
557 | error ("Invalid charset chars %d, it should be 94 or 96", | |
558 | XINT (chars)); | |
559 | for (final_char = '0'; final_char <= '?'; final_char++) | |
560 | { | |
561 | if (ISO_CHARSET_TABLE (dimension, chars, make_number (final_char)) < 0) | |
562 | break; | |
563 | } | |
564 | return (final_char <= '?' ? make_number (final_char) : Qnil); | |
565 | } | |
566 | ||
4ed46869 KH |
567 | DEFUN ("declare-equiv-charset", Fdeclare_equiv_charset, Sdeclare_equiv_charset, |
568 | 4, 4, 0, | |
569 | "Declare a charset of DIMENSION, CHARS, FINAL-CHAR is the same as CHARSET.\n\ | |
570 | CHARSET should be defined by `defined-charset' in advance.") | |
571 | (dimension, chars, final_char, charset_symbol) | |
572 | Lisp_Object dimension, chars, final_char, charset_symbol; | |
573 | { | |
574 | int charset; | |
575 | ||
576 | CHECK_NUMBER (dimension, 0); | |
577 | CHECK_NUMBER (chars, 1); | |
578 | CHECK_NUMBER (final_char, 2); | |
579 | CHECK_SYMBOL (charset_symbol, 3); | |
580 | ||
581 | if (XINT (dimension) != 1 && XINT (dimension) != 2) | |
582 | error ("Invalid DIMENSION %d, it should be 1 or 2", XINT (dimension)); | |
583 | if (XINT (chars) != 94 && XINT (chars) != 96) | |
584 | error ("Invalid CHARS %d, it should be 94 or 96", XINT (chars)); | |
585 | if (XINT (final_char) < '0' || XFASTINT (final_char) > '~') | |
586 | error ("Invalid FINAL-CHAR %c, it should be `0'..`~'", XINT (chars)); | |
587 | if ((charset = get_charset_id (charset_symbol)) < 0) | |
588 | error ("Invalid charset %s", XSYMBOL (charset_symbol)->name->data); | |
589 | ||
590 | ISO_CHARSET_TABLE (dimension, chars, final_char) = charset; | |
591 | return Qnil; | |
592 | } | |
593 | ||
594 | /* Return number of different charsets in STR of length LEN. In | |
595 | addition, for each found charset N, CHARSETS[N] is set 1. The | |
a29e3b1b | 596 | caller should allocate CHARSETS (MAX_CHARSET + 1 elements) in advance. |
23d2a7f1 | 597 | It may lookup a unification table TABLE if supplied. */ |
4ed46869 KH |
598 | |
599 | int | |
23d2a7f1 | 600 | find_charset_in_str (str, len, charsets, table) |
028d516b KH |
601 | unsigned char *str; |
602 | int len, *charsets; | |
23d2a7f1 | 603 | Lisp_Object table; |
4ed46869 | 604 | { |
733eafd8 | 605 | register int num = 0, c; |
4ed46869 | 606 | |
23d2a7f1 KH |
607 | if (! CHAR_TABLE_P (table)) |
608 | table = Qnil; | |
609 | ||
4ed46869 KH |
610 | while (len > 0) |
611 | { | |
05505664 | 612 | int bytes, charset; |
733eafd8 | 613 | c = *str; |
23d2a7f1 | 614 | |
733eafd8 | 615 | if (c == LEADING_CODE_COMPOSITION) |
05505664 | 616 | { |
733eafd8 KH |
617 | int cmpchar_id = str_cmpchar_id (str, len); |
618 | GLYPH *glyph; | |
05505664 | 619 | |
733eafd8 | 620 | if (cmpchar_id > 0) |
05505664 | 621 | { |
733eafd8 KH |
622 | struct cmpchar_info *cmpcharp = cmpchar_table[cmpchar_id]; |
623 | int i; | |
624 | ||
625 | for (i = 0; i < cmpcharp->glyph_len; i++) | |
626 | { | |
627 | c = cmpcharp->glyph[i]; | |
628 | if (!NILP (table)) | |
629 | { | |
630 | if ((c = unify_char (table, c, 0, 0, 0)) < 0) | |
631 | c = cmpcharp->glyph[i]; | |
632 | } | |
633 | if ((charset = CHAR_CHARSET (c)) < 0) | |
634 | charset = CHARSET_ASCII; | |
635 | if (!charsets[charset]) | |
636 | { | |
637 | charsets[charset] = 1; | |
638 | num += 1; | |
639 | } | |
640 | } | |
641 | str += cmpcharp->len; | |
642 | len -= cmpcharp->len; | |
643 | continue; | |
05505664 | 644 | } |
05505664 | 645 | |
733eafd8 KH |
646 | charset = CHARSET_ASCII; |
647 | bytes = 1; | |
648 | } | |
23d2a7f1 KH |
649 | else |
650 | { | |
733eafd8 KH |
651 | c = STRING_CHAR_AND_LENGTH (str, len, bytes); |
652 | if (! NILP (table)) | |
653 | { | |
654 | int c1 = unify_char (table, c, 0, 0, 0); | |
655 | if (c1 >= 0) | |
656 | c = c1; | |
657 | } | |
658 | charset = CHAR_CHARSET (c); | |
23d2a7f1 | 659 | } |
4ed46869 KH |
660 | |
661 | if (!charsets[charset]) | |
662 | { | |
663 | charsets[charset] = 1; | |
664 | num += 1; | |
665 | } | |
666 | str += bytes; | |
667 | len -= bytes; | |
668 | } | |
669 | return num; | |
670 | } | |
671 | ||
672 | DEFUN ("find-charset-region", Ffind_charset_region, Sfind_charset_region, | |
23d2a7f1 | 673 | 2, 3, 0, |
4ed46869 | 674 | "Return a list of charsets in the region between BEG and END.\n\ |
23d2a7f1 KH |
675 | BEG and END are buffer positions.\n\ |
676 | Optional arg TABLE if non-nil is a unification table to look up.") | |
677 | (beg, end, table) | |
678 | Lisp_Object beg, end, table; | |
4ed46869 | 679 | { |
028d516b | 680 | int charsets[MAX_CHARSET + 1]; |
6ae1f27e | 681 | int from, from_byte, to, stop, stop_byte, i; |
4ed46869 KH |
682 | Lisp_Object val; |
683 | ||
684 | validate_region (&beg, &end); | |
685 | from = XFASTINT (beg); | |
686 | stop = to = XFASTINT (end); | |
6ae1f27e | 687 | |
4ed46869 | 688 | if (from < GPT && GPT < to) |
6ae1f27e RS |
689 | { |
690 | stop = GPT; | |
691 | stop_byte = GPT_BYTE; | |
692 | } | |
693 | else | |
694 | stop_byte = CHAR_TO_BYTE (stop); | |
695 | ||
696 | from_byte = CHAR_TO_BYTE (from); | |
697 | ||
028d516b | 698 | bzero (charsets, (MAX_CHARSET + 1) * sizeof (int)); |
4ed46869 KH |
699 | while (1) |
700 | { | |
6ae1f27e RS |
701 | find_charset_in_str (BYTE_POS_ADDR (from_byte), stop_byte - from_byte, |
702 | charsets, table); | |
4ed46869 | 703 | if (stop < to) |
6ae1f27e RS |
704 | { |
705 | from = stop, from_byte = stop_byte; | |
706 | stop = to, stop_byte = CHAR_TO_BYTE (stop); | |
707 | } | |
4ed46869 KH |
708 | else |
709 | break; | |
710 | } | |
6ae1f27e | 711 | |
4ed46869 | 712 | val = Qnil; |
513ee442 | 713 | for (i = MAX_CHARSET; i >= 0; i--) |
4ed46869 KH |
714 | if (charsets[i]) |
715 | val = Fcons (CHARSET_SYMBOL (i), val); | |
716 | return val; | |
717 | } | |
718 | ||
719 | DEFUN ("find-charset-string", Ffind_charset_string, Sfind_charset_string, | |
23d2a7f1 KH |
720 | 1, 2, 0, |
721 | "Return a list of charsets in STR.\n\ | |
722 | Optional arg TABLE if non-nil is a unification table to look up.") | |
723 | (str, table) | |
724 | Lisp_Object str, table; | |
4ed46869 | 725 | { |
a29e3b1b | 726 | int charsets[MAX_CHARSET + 1]; |
4ed46869 KH |
727 | int i; |
728 | Lisp_Object val; | |
729 | ||
730 | CHECK_STRING (str, 0); | |
87b089ad RS |
731 | |
732 | if (! STRING_MULTIBYTE (str)) | |
733 | return Qnil; | |
734 | ||
a29e3b1b | 735 | bzero (charsets, (MAX_CHARSET + 1) * sizeof (int)); |
87b089ad | 736 | find_charset_in_str (XSTRING (str)->data, XSTRING (str)->size_byte, |
23d2a7f1 | 737 | charsets, table); |
4ed46869 | 738 | val = Qnil; |
513ee442 | 739 | for (i = MAX_CHARSET; i >= 0; i--) |
4ed46869 KH |
740 | if (charsets[i]) |
741 | val = Fcons (CHARSET_SYMBOL (i), val); | |
742 | return val; | |
743 | } | |
744 | \f | |
745 | DEFUN ("make-char-internal", Fmake_char_internal, Smake_char_internal, 1, 3, 0, | |
513ee442 | 746 | "") |
4ed46869 KH |
747 | (charset, code1, code2) |
748 | Lisp_Object charset, code1, code2; | |
749 | { | |
750 | CHECK_NUMBER (charset, 0); | |
751 | ||
752 | if (NILP (code1)) | |
753 | XSETFASTINT (code1, 0); | |
754 | else | |
755 | CHECK_NUMBER (code1, 1); | |
756 | if (NILP (code2)) | |
757 | XSETFASTINT (code2, 0); | |
758 | else | |
759 | CHECK_NUMBER (code2, 2); | |
760 | ||
761 | if (!CHARSET_DEFINED_P (XINT (charset))) | |
762 | error ("Invalid charset: %d", XINT (charset)); | |
763 | ||
764 | return make_number (MAKE_CHAR (XINT (charset), XINT (code1), XINT (code2))); | |
765 | } | |
766 | ||
767 | DEFUN ("split-char", Fsplit_char, Ssplit_char, 1, 1, 0, | |
768 | "Return list of charset and one or two position-codes of CHAR.") | |
769 | (ch) | |
770 | Lisp_Object ch; | |
771 | { | |
772 | Lisp_Object val; | |
6dc0722d | 773 | int charset, c1, c2; |
4ed46869 KH |
774 | |
775 | CHECK_NUMBER (ch, 0); | |
776 | SPLIT_CHAR (XFASTINT (ch), charset, c1, c2); | |
6dc0722d | 777 | return (c2 >= 0 |
4ed46869 KH |
778 | ? Fcons (CHARSET_SYMBOL (charset), |
779 | Fcons (make_number (c1), Fcons (make_number (c2), Qnil))) | |
780 | : Fcons (CHARSET_SYMBOL (charset), Fcons (make_number (c1), Qnil))); | |
781 | } | |
782 | ||
783 | DEFUN ("char-charset", Fchar_charset, Schar_charset, 1, 1, 0, | |
784 | "Return charset of CHAR.") | |
785 | (ch) | |
786 | Lisp_Object ch; | |
787 | { | |
788 | CHECK_NUMBER (ch, 0); | |
789 | ||
790 | return CHARSET_SYMBOL (CHAR_CHARSET (XINT (ch))); | |
791 | } | |
792 | ||
793 | DEFUN ("iso-charset", Fiso_charset, Siso_charset, 3, 3, 0, | |
794 | "Return charset of ISO's specification DIMENSION, CHARS, and FINAL-CHAR.") | |
795 | (dimension, chars, final_char) | |
796 | Lisp_Object dimension, chars, final_char; | |
797 | { | |
798 | int charset; | |
799 | ||
800 | CHECK_NUMBER (dimension, 0); | |
801 | CHECK_NUMBER (chars, 1); | |
802 | CHECK_NUMBER (final_char, 2); | |
803 | ||
804 | if ((charset = ISO_CHARSET_TABLE (dimension, chars, final_char)) < 0) | |
805 | return Qnil; | |
806 | return CHARSET_SYMBOL (charset); | |
807 | } | |
808 | ||
9d3d8cba KH |
809 | /* If GENERICP is nonzero, return nonzero iff C is a valid normal or |
810 | generic character. If GENERICP is zero, return nonzero iff C is a | |
811 | valid normal character. Do not call this function directly, | |
812 | instead use macro CHAR_VALID_P. */ | |
813 | int | |
814 | char_valid_p (c, genericp) | |
815 | int c, genericp; | |
816 | { | |
817 | int charset, c1, c2; | |
818 | ||
819 | if (c < 0) | |
820 | return 0; | |
821 | if (SINGLE_BYTE_CHAR_P (c)) | |
822 | return 1; | |
823 | SPLIT_NON_ASCII_CHAR (c, charset, c1, c2); | |
824 | if (!CHARSET_VALID_P (charset)) | |
825 | return 0; | |
826 | return (c < MIN_CHAR_COMPOSITION | |
827 | ? ((c & CHAR_FIELD1_MASK) /* i.e. dimension of C is two. */ | |
828 | ? (genericp && c1 == 0 && c2 == 0 | |
829 | || c1 >= 32 && c2 >= 32) | |
830 | : (genericp && c1 == 0 | |
831 | || c1 >= 32)) | |
832 | : c < MIN_CHAR_COMPOSITION + n_cmpchars); | |
833 | } | |
834 | ||
835 | DEFUN ("char-valid-p", Fchar_valid_p, Schar_valid_p, 1, 2, 0, | |
a9d02884 DL |
836 | "Return t if OBJECT is a valid normal character.\n\ |
837 | If optional arg GENERICP is non-nil, also return t if OBJECT is\n\ | |
9d3d8cba KH |
838 | a valid generic character.") |
839 | (object, genericp) | |
840 | Lisp_Object object, genericp; | |
841 | { | |
842 | if (! NATNUMP (object)) | |
843 | return Qnil; | |
844 | return (CHAR_VALID_P (XFASTINT (object), !NILP (genericp)) ? Qt : Qnil); | |
845 | } | |
846 | ||
4ed46869 KH |
847 | DEFUN ("char-bytes", Fchar_bytes, Schar_bytes, 1, 1, 0, |
848 | "Return byte length of multi-byte form of CHAR.") | |
849 | (ch) | |
850 | Lisp_Object ch; | |
851 | { | |
852 | Lisp_Object val; | |
853 | int bytes; | |
854 | ||
855 | CHECK_NUMBER (ch, 0); | |
856 | if (COMPOSITE_CHAR_P (XFASTINT (ch))) | |
857 | { | |
858 | unsigned int id = COMPOSITE_CHAR_ID (XFASTINT (ch)); | |
859 | ||
860 | bytes = (id < n_cmpchars ? cmpchar_table[id]->len : 1); | |
861 | } | |
862 | else | |
863 | { | |
864 | int charset = CHAR_CHARSET (XFASTINT (ch)); | |
865 | ||
866 | bytes = CHARSET_DEFINED_P (charset) ? CHARSET_BYTES (charset) : 1; | |
867 | } | |
868 | ||
869 | XSETFASTINT (val, bytes); | |
870 | return val; | |
871 | } | |
872 | ||
873 | /* Return the width of character of which multi-byte form starts with | |
874 | C. The width is measured by how many columns occupied on the | |
875 | screen when displayed in the current buffer. */ | |
876 | ||
877 | #define ONE_BYTE_CHAR_WIDTH(c) \ | |
878 | (c < 0x20 \ | |
879 | ? (c == '\t' \ | |
53316e55 | 880 | ? XFASTINT (current_buffer->tab_width) \ |
4ed46869 KH |
881 | : (c == '\n' ? 0 : (NILP (current_buffer->ctl_arrow) ? 4 : 2))) \ |
882 | : (c < 0x7f \ | |
883 | ? 1 \ | |
884 | : (c == 0x7F \ | |
885 | ? (NILP (current_buffer->ctl_arrow) ? 4 : 2) \ | |
886 | : ((! NILP (current_buffer->enable_multibyte_characters) \ | |
887 | && BASE_LEADING_CODE_P (c)) \ | |
888 | ? WIDTH_BY_CHAR_HEAD (c) \ | |
889 | : 4)))) \ | |
890 | ||
891 | ||
892 | DEFUN ("char-width", Fchar_width, Schar_width, 1, 1, 0, | |
893 | "Return width of CHAR when displayed in the current buffer.\n\ | |
894 | The width is measured by how many columns it occupies on the screen.") | |
895 | (ch) | |
896 | Lisp_Object ch; | |
897 | { | |
859f2b3c | 898 | Lisp_Object val, disp; |
4ed46869 | 899 | int c; |
51c4025f | 900 | struct Lisp_Char_Table *dp = buffer_display_table (); |
4ed46869 KH |
901 | |
902 | CHECK_NUMBER (ch, 0); | |
903 | ||
859f2b3c RS |
904 | c = XINT (ch); |
905 | ||
906 | /* Get the way the display table would display it. */ | |
51c4025f | 907 | disp = dp ? DISP_CHAR_VECTOR (dp, c) : Qnil; |
859f2b3c RS |
908 | |
909 | if (VECTORP (disp)) | |
910 | XSETINT (val, XVECTOR (disp)->size); | |
911 | else if (SINGLE_BYTE_CHAR_P (c)) | |
912 | XSETINT (val, ONE_BYTE_CHAR_WIDTH (c)); | |
4ed46869 KH |
913 | else if (COMPOSITE_CHAR_P (c)) |
914 | { | |
915 | int id = COMPOSITE_CHAR_ID (XFASTINT (ch)); | |
916 | XSETFASTINT (val, (id < n_cmpchars ? cmpchar_table[id]->width : 0)); | |
917 | } | |
918 | else | |
919 | { | |
920 | int charset = CHAR_CHARSET (c); | |
921 | ||
922 | XSETFASTINT (val, CHARSET_WIDTH (charset)); | |
923 | } | |
924 | return val; | |
925 | } | |
926 | ||
927 | /* Return width of string STR of length LEN when displayed in the | |
928 | current buffer. The width is measured by how many columns it | |
929 | occupies on the screen. */ | |
859f2b3c | 930 | |
4ed46869 KH |
931 | int |
932 | strwidth (str, len) | |
933 | unsigned char *str; | |
934 | int len; | |
935 | { | |
936 | unsigned char *endp = str + len; | |
937 | int width = 0; | |
c4a4e28f | 938 | struct Lisp_Char_Table *dp = buffer_display_table (); |
4ed46869 | 939 | |
859f2b3c RS |
940 | while (str < endp) |
941 | { | |
942 | if (*str == LEADING_CODE_COMPOSITION) | |
943 | { | |
944 | int id = str_cmpchar_id (str, endp - str); | |
945 | ||
946 | if (id < 0) | |
947 | { | |
948 | width += 4; | |
949 | str++; | |
950 | } | |
951 | else | |
952 | { | |
953 | width += cmpchar_table[id]->width; | |
954 | str += cmpchar_table[id]->len; | |
955 | } | |
956 | } | |
957 | else | |
958 | { | |
959 | Lisp_Object disp; | |
960 | int thiswidth; | |
961 | int c = STRING_CHAR (str, endp - str); | |
962 | ||
963 | /* Get the way the display table would display it. */ | |
acc35c36 RS |
964 | if (dp) |
965 | disp = DISP_CHAR_VECTOR (dp, c); | |
966 | else | |
967 | disp = Qnil; | |
859f2b3c RS |
968 | |
969 | if (VECTORP (disp)) | |
970 | thiswidth = XVECTOR (disp)->size; | |
971 | else | |
972 | thiswidth = ONE_BYTE_CHAR_WIDTH (*str); | |
973 | ||
974 | width += thiswidth; | |
975 | str += BYTES_BY_CHAR_HEAD (*str); | |
976 | } | |
977 | } | |
4ed46869 KH |
978 | return width; |
979 | } | |
980 | ||
981 | DEFUN ("string-width", Fstring_width, Sstring_width, 1, 1, 0, | |
982 | "Return width of STRING when displayed in the current buffer.\n\ | |
983 | Width is measured by how many columns it occupies on the screen.\n\ | |
046b1f03 RS |
984 | When calculating width of a multibyte character in STRING,\n\ |
985 | only the base leading-code is considered; the validity of\n\ | |
986 | the following bytes is not checked.") | |
4ed46869 KH |
987 | (str) |
988 | Lisp_Object str; | |
989 | { | |
990 | Lisp_Object val; | |
991 | ||
992 | CHECK_STRING (str, 0); | |
993 | XSETFASTINT (val, strwidth (XSTRING (str)->data, XSTRING (str)->size)); | |
994 | return val; | |
995 | } | |
996 | ||
997 | DEFUN ("char-direction", Fchar_direction, Schar_direction, 1, 1, 0, | |
998 | "Return the direction of CHAR.\n\ | |
999 | The returned value is 0 for left-to-right and 1 for right-to-left.") | |
1000 | (ch) | |
1001 | Lisp_Object ch; | |
1002 | { | |
1003 | int charset; | |
1004 | ||
1005 | CHECK_NUMBER (ch, 0); | |
1006 | charset = CHAR_CHARSET (XFASTINT (ch)); | |
1007 | if (!CHARSET_DEFINED_P (charset)) | |
1008 | error ("Invalid character: %d", XINT (ch)); | |
1009 | return CHARSET_TABLE_INFO (charset, CHARSET_DIRECTION_IDX); | |
1010 | } | |
1011 | ||
af4fecb4 | 1012 | DEFUN ("chars-in-region", Fchars_in_region, Schars_in_region, 2, 2, 0, |
6ae1f27e | 1013 | "Return number of characters between BEG and END.") |
046b1f03 RS |
1014 | (beg, end) |
1015 | Lisp_Object beg, end; | |
1016 | { | |
6ae1f27e | 1017 | int from, to; |
046b1f03 RS |
1018 | |
1019 | from = min (XFASTINT (beg), XFASTINT (end)); | |
a8a35e61 | 1020 | to = max (XFASTINT (beg), XFASTINT (end)); |
046b1f03 | 1021 | |
6ae1f27e RS |
1022 | return to - from; |
1023 | } | |
9036eb45 | 1024 | |
87b089ad RS |
1025 | /* Return the number of characters in the NBYTES bytes at PTR. |
1026 | This works by looking at the contents and checking for multibyte sequences. | |
1027 | However, if the current buffer has enable-multibyte-characters = nil, | |
1028 | we treat each byte as a character. */ | |
1029 | ||
6ae1f27e RS |
1030 | int |
1031 | chars_in_text (ptr, nbytes) | |
1032 | unsigned char *ptr; | |
1033 | int nbytes; | |
1034 | { | |
1035 | unsigned char *endp; | |
1036 | int chars; | |
046b1f03 | 1037 | |
87b089ad RS |
1038 | /* current_buffer is null at early stages of Emacs initialization. */ |
1039 | if (current_buffer == 0 | |
1040 | || NILP (current_buffer->enable_multibyte_characters)) | |
6ae1f27e | 1041 | return nbytes; |
a8a35e61 | 1042 | |
6ae1f27e RS |
1043 | endp = ptr + nbytes; |
1044 | chars = 0; | |
046b1f03 | 1045 | |
6ae1f27e RS |
1046 | while (ptr < endp) |
1047 | { | |
1048 | if (*ptr == LEADING_CODE_COMPOSITION) | |
046b1f03 | 1049 | { |
6ae1f27e RS |
1050 | ptr++; |
1051 | while (ptr < endp && ! CHAR_HEAD_P (*ptr)) ptr++; | |
046b1f03 RS |
1052 | } |
1053 | else | |
6ae1f27e | 1054 | ptr += BYTES_BY_CHAR_HEAD (*ptr); |
046b1f03 RS |
1055 | chars++; |
1056 | } | |
1057 | ||
6ae1f27e | 1058 | return chars; |
046b1f03 RS |
1059 | } |
1060 | ||
87b089ad RS |
1061 | /* Return the number of characters in the NBYTES bytes at PTR. |
1062 | This works by looking at the contents and checking for multibyte sequences. | |
1063 | It ignores enable-multibyte-characters. */ | |
1064 | ||
1065 | int | |
1066 | multibyte_chars_in_text (ptr, nbytes) | |
1067 | unsigned char *ptr; | |
1068 | int nbytes; | |
1069 | { | |
1070 | unsigned char *endp; | |
1071 | int chars; | |
1072 | ||
1073 | endp = ptr + nbytes; | |
1074 | chars = 0; | |
1075 | ||
1076 | while (ptr < endp) | |
1077 | { | |
1078 | if (*ptr == LEADING_CODE_COMPOSITION) | |
1079 | { | |
1080 | ptr++; | |
1081 | while (ptr < endp && ! CHAR_HEAD_P (*ptr)) ptr++; | |
1082 | } | |
1083 | else | |
1084 | ptr += BYTES_BY_CHAR_HEAD (*ptr); | |
1085 | chars++; | |
1086 | } | |
1087 | ||
1088 | return chars; | |
1089 | } | |
1090 | ||
1091 | DEFUN ("string", Fstring, Sstring, 1, MANY, 0, | |
4ed46869 | 1092 | "Concatenate all the argument characters and make the result a string.") |
53316e55 KH |
1093 | (n, args) |
1094 | int n; | |
4ed46869 KH |
1095 | Lisp_Object *args; |
1096 | { | |
53316e55 | 1097 | int i; |
4ed46869 | 1098 | unsigned char *buf |
bd4c6dd0 | 1099 | = (unsigned char *) alloca (MAX_LENGTH_OF_MULTI_BYTE_FORM * n); |
4ed46869 KH |
1100 | unsigned char *p = buf; |
1101 | Lisp_Object val; | |
1102 | ||
1103 | for (i = 0; i < n; i++) | |
1104 | { | |
1105 | int c, len; | |
1106 | unsigned char *str; | |
1107 | ||
1108 | if (!INTEGERP (args[i])) | |
b0e3cf2b | 1109 | CHECK_NUMBER (args[i], 0); |
4ed46869 KH |
1110 | c = XINT (args[i]); |
1111 | len = CHAR_STRING (c, p, str); | |
1112 | if (p != str) | |
1113 | /* C is a composite character. */ | |
1114 | bcopy (str, p, len); | |
1115 | p += len; | |
1116 | } | |
1117 | ||
87b089ad | 1118 | val = make_multibyte_string (buf, n, p - buf); |
4ed46869 KH |
1119 | return val; |
1120 | } | |
1121 | ||
1122 | #endif /* emacs */ | |
1123 | \f | |
1124 | /*** Composite characters staffs ***/ | |
1125 | ||
1126 | /* Each composite character is identified by CMPCHAR-ID which is | |
1127 | assigned when Emacs needs the character code of the composite | |
1128 | character (e.g. when displaying it on the screen). See the | |
1129 | document "GENERAL NOTE on COMPOSITE CHARACTER" in `charset.h' how a | |
1130 | composite character is represented in Emacs. */ | |
1131 | ||
1132 | /* If `static' is defined, it means that it is defined to null string. */ | |
1133 | #ifndef static | |
1134 | /* The following function is copied from lread.c. */ | |
1135 | static int | |
1136 | hash_string (ptr, len) | |
1137 | unsigned char *ptr; | |
1138 | int len; | |
1139 | { | |
1140 | register unsigned char *p = ptr; | |
1141 | register unsigned char *end = p + len; | |
1142 | register unsigned char c; | |
1143 | register int hash = 0; | |
1144 | ||
1145 | while (p != end) | |
1146 | { | |
1147 | c = *p++; | |
1148 | if (c >= 0140) c -= 40; | |
1149 | hash = ((hash<<3) + (hash>>28) + c); | |
1150 | } | |
1151 | return hash & 07777777777; | |
1152 | } | |
1153 | #endif | |
1154 | ||
4ed46869 KH |
1155 | #define CMPCHAR_HASH_TABLE_SIZE 0xFFF |
1156 | ||
1157 | static int *cmpchar_hash_table[CMPCHAR_HASH_TABLE_SIZE]; | |
1158 | ||
1159 | /* Each element of `cmpchar_hash_table' is a pointer to an array of | |
1160 | integer, where the 1st element is the size of the array, the 2nd | |
1161 | element is how many elements are actually used in the array, and | |
1162 | the remaining elements are CMPCHAR-IDs of composite characters of | |
1163 | the same hash value. */ | |
1164 | #define CMPCHAR_HASH_SIZE(table) table[0] | |
1165 | #define CMPCHAR_HASH_USED(table) table[1] | |
1166 | #define CMPCHAR_HASH_CMPCHAR_ID(table, i) table[i] | |
1167 | ||
1168 | /* Return CMPCHAR-ID of the composite character in STR of the length | |
1169 | LEN. If the composite character has not yet been registered, | |
1170 | register it in `cmpchar_table' and assign new CMPCHAR-ID. This | |
1171 | is the sole function for assigning CMPCHAR-ID. */ | |
1172 | int | |
1173 | str_cmpchar_id (str, len) | |
1174 | unsigned char *str; | |
1175 | int len; | |
1176 | { | |
1177 | int hash_idx, *hashp; | |
1178 | unsigned char *buf; | |
1179 | int embedded_rule; /* 1 if composition rule is embedded. */ | |
1180 | int chars; /* number of components. */ | |
1181 | int i; | |
1182 | struct cmpchar_info *cmpcharp; | |
1183 | ||
1184 | if (len < 5) | |
1185 | /* Any composite char have at least 3-byte length. */ | |
1186 | return -1; | |
1187 | ||
1188 | /* The second byte 0xFF means compostion rule is embedded. */ | |
1189 | embedded_rule = (str[1] == 0xFF); | |
1190 | ||
1191 | /* At first, get the actual length of the composite character. */ | |
1192 | { | |
1193 | unsigned char *p, *endp = str + 1, *lastp = str + len; | |
1194 | int bytes; | |
1195 | ||
6ae1f27e | 1196 | while (endp < lastp && ! CHAR_HEAD_P (*endp)) endp++; |
4ed46869 KH |
1197 | chars = 0; |
1198 | p = str + 1 + embedded_rule; | |
1199 | while (p < endp) | |
1200 | { | |
1201 | /* No need of checking if *P is 0xA0 because | |
1202 | BYTES_BY_CHAR_HEAD (0x80) surely returns 2. */ | |
1203 | p += (bytes = BYTES_BY_CHAR_HEAD (*p - 0x20) + embedded_rule); | |
1204 | chars++; | |
1205 | } | |
1206 | len = (p -= embedded_rule) - str; | |
1207 | if (p > endp) | |
1208 | len -= - bytes, chars--; | |
1209 | ||
1210 | if (chars < 2 || chars > MAX_COMPONENT_COUNT) | |
1211 | /* Invalid number of components. */ | |
1212 | return -1; | |
1213 | } | |
1214 | hash_idx = hash_string (str, len) % CMPCHAR_HASH_TABLE_SIZE; | |
1215 | hashp = cmpchar_hash_table[hash_idx]; | |
1216 | ||
1217 | /* Then, look into the hash table. */ | |
1218 | if (hashp != NULL) | |
1219 | /* Find the correct one among composite characters of the same | |
1220 | hash value. */ | |
1221 | for (i = 2; i < CMPCHAR_HASH_USED (hashp); i++) | |
1222 | { | |
1223 | cmpcharp = cmpchar_table[CMPCHAR_HASH_CMPCHAR_ID (hashp, i)]; | |
1224 | if (len == cmpcharp->len | |
1225 | && ! bcmp (str, cmpcharp->data, len)) | |
1226 | return CMPCHAR_HASH_CMPCHAR_ID (hashp, i); | |
1227 | } | |
1228 | ||
1229 | /* We have to register the composite character in cmpchar_table. */ | |
513ee442 KH |
1230 | if (n_cmpchars > (CHAR_FIELD2_MASK | CHAR_FIELD3_MASK)) |
1231 | /* No, we have no more room for a new composite character. */ | |
1232 | return -1; | |
1233 | ||
4ed46869 KH |
1234 | /* Make the entry in hash table. */ |
1235 | if (hashp == NULL) | |
1236 | { | |
1237 | /* Make a table for 8 composite characters initially. */ | |
1238 | hashp = (cmpchar_hash_table[hash_idx] | |
1239 | = (int *) xmalloc (sizeof (int) * (2 + 8))); | |
1240 | CMPCHAR_HASH_SIZE (hashp) = 10; | |
1241 | CMPCHAR_HASH_USED (hashp) = 2; | |
1242 | } | |
1243 | else if (CMPCHAR_HASH_USED (hashp) >= CMPCHAR_HASH_SIZE (hashp)) | |
1244 | { | |
1245 | CMPCHAR_HASH_SIZE (hashp) += 8; | |
1246 | hashp = (cmpchar_hash_table[hash_idx] | |
1247 | = (int *) xrealloc (hashp, | |
1248 | sizeof (int) * CMPCHAR_HASH_SIZE (hashp))); | |
1249 | } | |
1250 | CMPCHAR_HASH_CMPCHAR_ID (hashp, CMPCHAR_HASH_USED (hashp)) = n_cmpchars; | |
1251 | CMPCHAR_HASH_USED (hashp)++; | |
1252 | ||
1253 | /* Set information of the composite character in cmpchar_table. */ | |
1254 | if (cmpchar_table_size == 0) | |
1255 | { | |
1256 | /* This is the first composite character to be registered. */ | |
1257 | cmpchar_table_size = 256; | |
1258 | cmpchar_table | |
1259 | = (struct cmpchar_info **) xmalloc (sizeof (cmpchar_table[0]) | |
1260 | * cmpchar_table_size); | |
1261 | } | |
1262 | else if (cmpchar_table_size <= n_cmpchars) | |
1263 | { | |
1264 | cmpchar_table_size += 256; | |
1265 | cmpchar_table | |
1266 | = (struct cmpchar_info **) xrealloc (cmpchar_table, | |
1267 | sizeof (cmpchar_table[0]) | |
1268 | * cmpchar_table_size); | |
1269 | } | |
1270 | ||
1271 | cmpcharp = (struct cmpchar_info *) xmalloc (sizeof (struct cmpchar_info)); | |
1272 | ||
1273 | cmpcharp->len = len; | |
1274 | cmpcharp->data = (unsigned char *) xmalloc (len + 1); | |
1275 | bcopy (str, cmpcharp->data, len); | |
1276 | cmpcharp->data[len] = 0; | |
1277 | cmpcharp->glyph_len = chars; | |
1278 | cmpcharp->glyph = (GLYPH *) xmalloc (sizeof (GLYPH) * chars); | |
1279 | if (embedded_rule) | |
1280 | { | |
1281 | cmpcharp->cmp_rule = (unsigned char *) xmalloc (chars); | |
1282 | cmpcharp->col_offset = (float *) xmalloc (sizeof (float) * chars); | |
1283 | } | |
1284 | else | |
1285 | { | |
1286 | cmpcharp->cmp_rule = NULL; | |
1287 | cmpcharp->col_offset = NULL; | |
1288 | } | |
1289 | ||
1290 | /* Setup GLYPH data and composition rules (if any) so as not to make | |
1291 | them every time on displaying. */ | |
1292 | { | |
1293 | unsigned char *bufp; | |
1294 | int width; | |
1295 | float leftmost = 0.0, rightmost = 1.0; | |
1296 | ||
1297 | if (embedded_rule) | |
1298 | /* At first, col_offset[N] is set to relative to col_offset[0]. */ | |
1299 | cmpcharp->col_offset[0] = 0; | |
1300 | ||
1301 | for (i = 0, bufp = cmpcharp->data + 1; i < chars; i++) | |
1302 | { | |
1303 | if (embedded_rule) | |
1304 | cmpcharp->cmp_rule[i] = *bufp++; | |
1305 | ||
1306 | if (*bufp == 0xA0) /* This is an ASCII character. */ | |
1307 | { | |
1308 | cmpcharp->glyph[i] = FAST_MAKE_GLYPH ((*++bufp & 0x7F), 0); | |
1309 | width = 1; | |
1310 | bufp++; | |
1311 | } | |
1312 | else /* Multibyte character. */ | |
1313 | { | |
1314 | /* Make `bufp' point normal multi-byte form temporally. */ | |
1315 | *bufp -= 0x20; | |
1316 | cmpcharp->glyph[i] | |
1317 | = FAST_MAKE_GLYPH (string_to_non_ascii_char (bufp, 4, 0), 0); | |
1318 | width = WIDTH_BY_CHAR_HEAD (*bufp); | |
1319 | *bufp += 0x20; | |
1320 | bufp += BYTES_BY_CHAR_HEAD (*bufp - 0x20); | |
1321 | } | |
1322 | ||
1323 | if (embedded_rule && i > 0) | |
1324 | { | |
1325 | /* Reference points (global_ref and new_ref) are | |
1326 | encoded as below: | |
1327 | ||
1328 | 0--1--2 -- ascent | |
1329 | | | | |
1330 | | | | |
1331 | | 4 -+--- center | |
1332 | -- 3 5 -- baseline | |
1333 | | | | |
1334 | 6--7--8 -- descent | |
1335 | ||
1336 | Now, we calculate the column offset of the new glyph | |
1337 | from the left edge of the first glyph. This can avoid | |
1338 | the same calculation everytime displaying this | |
1339 | composite character. */ | |
1340 | ||
1341 | /* Reference points of global glyph and new glyph. */ | |
1342 | int global_ref = (cmpcharp->cmp_rule[i] - 0xA0) / 9; | |
1343 | int new_ref = (cmpcharp->cmp_rule[i] - 0xA0) % 9; | |
1344 | /* Column offset relative to the first glyph. */ | |
1345 | float left = (leftmost | |
1346 | + (global_ref % 3) * (rightmost - leftmost) / 2.0 | |
1347 | - (new_ref % 3) * width / 2.0); | |
1348 | ||
1349 | cmpcharp->col_offset[i] = left; | |
1350 | if (left < leftmost) | |
1351 | leftmost = left; | |
1352 | if (left + width > rightmost) | |
1353 | rightmost = left + width; | |
1354 | } | |
1355 | else | |
1356 | { | |
1357 | if (width > rightmost) | |
1358 | rightmost = width; | |
1359 | } | |
1360 | } | |
1361 | if (embedded_rule) | |
1362 | { | |
1363 | /* Now col_offset[N] are relative to the left edge of the | |
1364 | first component. Make them relative to the left edge of | |
1365 | overall glyph. */ | |
1366 | for (i = 0; i < chars; i++) | |
1367 | cmpcharp->col_offset[i] -= leftmost; | |
1368 | /* Make rightmost holds width of overall glyph. */ | |
1369 | rightmost -= leftmost; | |
1370 | } | |
1371 | ||
1372 | cmpcharp->width = rightmost; | |
1373 | if (cmpcharp->width < rightmost) | |
1374 | /* To get a ceiling integer value. */ | |
1375 | cmpcharp->width++; | |
1376 | } | |
1377 | ||
1378 | cmpchar_table[n_cmpchars] = cmpcharp; | |
1379 | ||
1380 | return n_cmpchars++; | |
1381 | } | |
1382 | ||
1383 | /* Return the Nth element of the composite character C. */ | |
1384 | int | |
1385 | cmpchar_component (c, n) | |
1386 | unsigned int c, n; | |
1387 | { | |
1388 | int id = COMPOSITE_CHAR_ID (c); | |
1389 | ||
1390 | if (id >= n_cmpchars /* C is not a valid composite character. */ | |
1391 | || n >= cmpchar_table[id]->glyph_len) /* No such component. */ | |
1392 | return -1; | |
1393 | /* No face data is stored in glyph code. */ | |
1394 | return ((int) (cmpchar_table[id]->glyph[n])); | |
1395 | } | |
1396 | ||
1397 | DEFUN ("cmpcharp", Fcmpcharp, Scmpcharp, 1, 1, 0, | |
1398 | "T if CHAR is a composite character.") | |
1399 | (ch) | |
1400 | Lisp_Object ch; | |
1401 | { | |
1402 | CHECK_NUMBER (ch, 0); | |
1403 | return (COMPOSITE_CHAR_P (XINT (ch)) ? Qt : Qnil); | |
1404 | } | |
1405 | ||
1406 | DEFUN ("composite-char-component", Fcmpchar_component, Scmpchar_component, | |
1407 | 2, 2, 0, | |
1408 | "Return the IDXth component character of composite character CHARACTER.") | |
1409 | (character, idx) | |
1410 | Lisp_Object character, idx; | |
1411 | { | |
1412 | int c; | |
1413 | ||
1414 | CHECK_NUMBER (character, 0); | |
1415 | CHECK_NUMBER (idx, 1); | |
1416 | ||
1417 | if ((c = cmpchar_component (XINT (character), XINT (idx))) < 0) | |
1418 | args_out_of_range (character, idx); | |
1419 | ||
1420 | return make_number (c); | |
1421 | } | |
1422 | ||
1423 | DEFUN ("composite-char-composition-rule", Fcmpchar_cmp_rule, Scmpchar_cmp_rule, | |
1424 | 2, 2, 0, | |
55001746 KH |
1425 | "Return the Nth composition rule embedded in composite character CHARACTER.\n\ |
1426 | The returned rule is for composing the Nth component\n\ | |
1427 | on the (N-1)th component. If N is 0, the returned value is always 255.") | |
1428 | (character, n) | |
1429 | Lisp_Object character, n; | |
4ed46869 KH |
1430 | { |
1431 | int id, i; | |
1432 | ||
1433 | CHECK_NUMBER (character, 0); | |
55001746 | 1434 | CHECK_NUMBER (n, 1); |
4ed46869 KH |
1435 | |
1436 | id = COMPOSITE_CHAR_ID (XINT (character)); | |
1437 | if (id < 0 || id >= n_cmpchars) | |
1438 | error ("Invalid composite character: %d", XINT (character)); | |
55001746 | 1439 | i = XINT (n); |
4ed46869 | 1440 | if (i > cmpchar_table[id]->glyph_len) |
55001746 | 1441 | args_out_of_range (character, n); |
4ed46869 KH |
1442 | |
1443 | return make_number (cmpchar_table[id]->cmp_rule[i]); | |
1444 | } | |
1445 | ||
1446 | DEFUN ("composite-char-composition-rule-p", Fcmpchar_cmp_rule_p, | |
1447 | Scmpchar_cmp_rule_p, 1, 1, 0, | |
1448 | "Return non-nil if composite character CHARACTER contains a embedded rule.") | |
1449 | (character) | |
1450 | Lisp_Object character; | |
1451 | { | |
1452 | int id; | |
1453 | ||
1454 | CHECK_NUMBER (character, 0); | |
1455 | id = COMPOSITE_CHAR_ID (XINT (character)); | |
1456 | if (id < 0 || id >= n_cmpchars) | |
1457 | error ("Invalid composite character: %d", XINT (character)); | |
1458 | ||
1459 | return (cmpchar_table[id]->cmp_rule ? Qt : Qnil); | |
1460 | } | |
1461 | ||
1462 | DEFUN ("composite-char-component-count", Fcmpchar_cmp_count, | |
1463 | Scmpchar_cmp_count, 1, 1, 0, | |
1464 | "Return number of compoents of composite character CHARACTER.") | |
1465 | (character) | |
1466 | Lisp_Object character; | |
1467 | { | |
1468 | int id; | |
1469 | ||
1470 | CHECK_NUMBER (character, 0); | |
1471 | id = COMPOSITE_CHAR_ID (XINT (character)); | |
1472 | if (id < 0 || id >= n_cmpchars) | |
1473 | error ("Invalid composite character: %d", XINT (character)); | |
1474 | ||
1475 | return (make_number (cmpchar_table[id]->glyph_len)); | |
1476 | } | |
1477 | ||
1478 | DEFUN ("compose-string", Fcompose_string, Scompose_string, | |
1479 | 1, 1, 0, | |
1480 | "Return one char string composed from all characters in STRING.") | |
1481 | (str) | |
1482 | Lisp_Object str; | |
1483 | { | |
1484 | unsigned char buf[MAX_LENGTH_OF_MULTI_BYTE_FORM], *p, *pend, *ptemp; | |
1485 | int len, i; | |
1486 | ||
1487 | CHECK_STRING (str, 0); | |
1488 | ||
1489 | buf[0] = LEADING_CODE_COMPOSITION; | |
1490 | p = XSTRING (str)->data; | |
87b089ad | 1491 | pend = p + XSTRING (str)->size_byte; |
4ed46869 KH |
1492 | i = 1; |
1493 | while (p < pend) | |
1494 | { | |
1495 | if (*p < 0x20 || *p == 127) /* control code */ | |
1496 | error ("Invalid component character: %d", *p); | |
1497 | else if (*p < 0x80) /* ASCII */ | |
1498 | { | |
1499 | if (i + 2 >= MAX_LENGTH_OF_MULTI_BYTE_FORM) | |
1500 | error ("Too long string to be composed: %s", XSTRING (str)->data); | |
1501 | /* Prepend an ASCII charset indicator 0xA0, set MSB of the | |
1502 | code itself. */ | |
1503 | buf[i++] = 0xA0; | |
1504 | buf[i++] = *p++ + 0x80; | |
1505 | } | |
1506 | else if (*p == LEADING_CODE_COMPOSITION) /* composite char */ | |
1507 | { | |
1508 | /* Already composed. Eliminate the heading | |
1509 | LEADING_CODE_COMPOSITION, keep the remaining bytes | |
1510 | unchanged. */ | |
1511 | p++; | |
1512 | ptemp = p; | |
6ae1f27e | 1513 | while (! CHAR_HEAD_P (*p)) p++; |
4ed46869 KH |
1514 | if (i + (p - ptemp) >= MAX_LENGTH_OF_MULTI_BYTE_FORM) |
1515 | error ("Too long string to be composed: %s", XSTRING (str)->data); | |
1516 | bcopy (ptemp, buf + i, p - ptemp); | |
1517 | i += p - ptemp; | |
1518 | } | |
1519 | else /* multibyte char */ | |
1520 | { | |
1521 | /* Add 0x20 to the base leading-code, keep the remaining | |
1522 | bytes unchanged. */ | |
1523 | len = BYTES_BY_CHAR_HEAD (*p); | |
1524 | if (i + len >= MAX_LENGTH_OF_MULTI_BYTE_FORM) | |
1525 | error ("Too long string to be composed: %s", XSTRING (str)->data); | |
1526 | bcopy (p, buf + i, len); | |
1527 | buf[i] += 0x20; | |
1528 | p += len, i += len; | |
1529 | } | |
1530 | } | |
1531 | ||
1532 | if (i < 5) | |
1533 | /* STR contains only one character, which can't be composed. */ | |
1534 | error ("Too short string to be composed: %s", XSTRING (str)->data); | |
1535 | ||
87b089ad | 1536 | return make_multibyte_string (buf, 1, i); |
4ed46869 KH |
1537 | } |
1538 | ||
1539 | \f | |
1540 | charset_id_internal (charset_name) | |
1541 | char *charset_name; | |
1542 | { | |
1543 | Lisp_Object val = Fget (intern (charset_name), Qcharset); | |
1544 | ||
1545 | if (!VECTORP (val)) | |
1546 | error ("Charset %s is not defined", charset_name); | |
1547 | ||
1548 | return (XINT (XVECTOR (val)->contents[0])); | |
1549 | } | |
1550 | ||
1551 | DEFUN ("setup-special-charsets", Fsetup_special_charsets, | |
1552 | Ssetup_special_charsets, 0, 0, 0, "Internal use only.") | |
1553 | () | |
1554 | { | |
1555 | charset_latin_iso8859_1 = charset_id_internal ("latin-iso8859-1"); | |
1556 | charset_jisx0208_1978 = charset_id_internal ("japanese-jisx0208-1978"); | |
1557 | charset_jisx0208 = charset_id_internal ("japanese-jisx0208"); | |
1558 | charset_katakana_jisx0201 = charset_id_internal ("katakana-jisx0201"); | |
1559 | charset_latin_jisx0201 = charset_id_internal ("latin-jisx0201"); | |
1560 | charset_big5_1 = charset_id_internal ("chinese-big5-1"); | |
1561 | charset_big5_2 = charset_id_internal ("chinese-big5-2"); | |
1562 | return Qnil; | |
1563 | } | |
1564 | ||
1565 | init_charset_once () | |
1566 | { | |
1567 | int i, j, k; | |
1568 | ||
1569 | staticpro (&Vcharset_table); | |
1570 | staticpro (&Vcharset_symbol_table); | |
1571 | ||
1572 | /* This has to be done here, before we call Fmake_char_table. */ | |
1573 | Qcharset_table = intern ("charset-table"); | |
1574 | staticpro (&Qcharset_table); | |
1575 | ||
1576 | /* Intern this now in case it isn't already done. | |
1577 | Setting this variable twice is harmless. | |
1578 | But don't staticpro it here--that is done in alloc.c. */ | |
1579 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
1580 | ||
1581 | /* Now we are ready to set up this property, so we can | |
1582 | create the charset table. */ | |
1583 | Fput (Qcharset_table, Qchar_table_extra_slots, make_number (0)); | |
1584 | Vcharset_table = Fmake_char_table (Qcharset_table, Qnil); | |
1585 | ||
513ee442 | 1586 | Vcharset_symbol_table = Fmake_vector (make_number (MAX_CHARSET + 1), Qnil); |
4ed46869 KH |
1587 | |
1588 | /* Setup tables. */ | |
1589 | for (i = 0; i < 2; i++) | |
1590 | for (j = 0; j < 2; j++) | |
1591 | for (k = 0; k < 128; k++) | |
1592 | iso_charset_table [i][j][k] = -1; | |
1593 | ||
1594 | bzero (cmpchar_hash_table, sizeof cmpchar_hash_table); | |
1595 | cmpchar_table_size = n_cmpchars = 0; | |
1596 | ||
1597 | for (i = 0; i < 256; i++) | |
1598 | BYTES_BY_CHAR_HEAD (i) = 1; | |
1599 | BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_11) = 3; | |
1600 | BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_12) = 3; | |
1601 | BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_21) = 4; | |
1602 | BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_22) = 4; | |
1603 | /* The following doesn't reflect the actual bytes, but just to tell | |
1604 | that it is a start of a multibyte character. */ | |
1605 | BYTES_BY_CHAR_HEAD (LEADING_CODE_COMPOSITION) = 2; | |
1606 | ||
1607 | for (i = 0; i < 128; i++) | |
1608 | WIDTH_BY_CHAR_HEAD (i) = 1; | |
1609 | for (; i < 256; i++) | |
1610 | WIDTH_BY_CHAR_HEAD (i) = 4; | |
1611 | WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_11) = 1; | |
1612 | WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_12) = 2; | |
1613 | WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_21) = 1; | |
1614 | WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_22) = 2; | |
1615 | } | |
1616 | ||
1617 | #ifdef emacs | |
1618 | ||
1619 | syms_of_charset () | |
1620 | { | |
1621 | Qascii = intern ("ascii"); | |
1622 | staticpro (&Qascii); | |
1623 | ||
1624 | Qcharset = intern ("charset"); | |
1625 | staticpro (&Qcharset); | |
1626 | ||
1627 | /* Define ASCII charset now. */ | |
1628 | update_charset_table (make_number (CHARSET_ASCII), | |
1629 | make_number (1), make_number (94), | |
1630 | make_number (1), | |
1631 | make_number (0), | |
1632 | make_number ('B'), | |
1633 | make_number (0), | |
1634 | build_string ("ASCII"), | |
1635 | build_string ("ASCII"), | |
1636 | build_string ("ASCII (ISO646 IRV)")); | |
1637 | CHARSET_SYMBOL (CHARSET_ASCII) = Qascii; | |
1638 | Fput (Qascii, Qcharset, CHARSET_TABLE_ENTRY (CHARSET_ASCII)); | |
1639 | ||
1640 | Qcomposition = intern ("composition"); | |
1641 | staticpro (&Qcomposition); | |
1642 | CHARSET_SYMBOL (CHARSET_COMPOSITION) = Qcomposition; | |
1643 | ||
1644 | defsubr (&Sdefine_charset); | |
3fac5a51 | 1645 | defsubr (&Sget_unused_iso_final_char); |
4ed46869 KH |
1646 | defsubr (&Sdeclare_equiv_charset); |
1647 | defsubr (&Sfind_charset_region); | |
1648 | defsubr (&Sfind_charset_string); | |
1649 | defsubr (&Smake_char_internal); | |
1650 | defsubr (&Ssplit_char); | |
1651 | defsubr (&Schar_charset); | |
1652 | defsubr (&Siso_charset); | |
9d3d8cba | 1653 | defsubr (&Schar_valid_p); |
4ed46869 KH |
1654 | defsubr (&Schar_bytes); |
1655 | defsubr (&Schar_width); | |
1656 | defsubr (&Sstring_width); | |
1657 | defsubr (&Schar_direction); | |
af4fecb4 | 1658 | defsubr (&Schars_in_region); |
87b089ad | 1659 | defsubr (&Sstring); |
4ed46869 KH |
1660 | defsubr (&Scmpcharp); |
1661 | defsubr (&Scmpchar_component); | |
1662 | defsubr (&Scmpchar_cmp_rule); | |
1663 | defsubr (&Scmpchar_cmp_rule_p); | |
1664 | defsubr (&Scmpchar_cmp_count); | |
1665 | defsubr (&Scompose_string); | |
1666 | defsubr (&Ssetup_special_charsets); | |
1667 | ||
1668 | DEFVAR_LISP ("charset-list", &Vcharset_list, | |
1669 | "List of charsets ever defined."); | |
1670 | Vcharset_list = Fcons (Qascii, Qnil); | |
1671 | ||
b0e3cf2b KH |
1672 | DEFVAR_LISP ("character-unification-table-vector", |
1673 | &Vcharacter_unification_table_vector, | |
1674 | "Vector of cons cell of a symbol and unification table ever defined.\n\ | |
1675 | An ID of a unification table is an index of this vector."); | |
1676 | Vcharacter_unification_table_vector = Fmake_vector (make_number (16), Qnil); | |
1677 | ||
4ed46869 KH |
1678 | DEFVAR_INT ("leading-code-composition", &leading_code_composition, |
1679 | "Leading-code of composite characters."); | |
1680 | leading_code_composition = LEADING_CODE_COMPOSITION; | |
1681 | ||
1682 | DEFVAR_INT ("leading-code-private-11", &leading_code_private_11, | |
1683 | "Leading-code of private TYPE9N charset of column-width 1."); | |
1684 | leading_code_private_11 = LEADING_CODE_PRIVATE_11; | |
1685 | ||
1686 | DEFVAR_INT ("leading-code-private-12", &leading_code_private_12, | |
1687 | "Leading-code of private TYPE9N charset of column-width 2."); | |
1688 | leading_code_private_12 = LEADING_CODE_PRIVATE_12; | |
1689 | ||
1690 | DEFVAR_INT ("leading-code-private-21", &leading_code_private_21, | |
1691 | "Leading-code of private TYPE9Nx9N charset of column-width 1."); | |
1692 | leading_code_private_21 = LEADING_CODE_PRIVATE_21; | |
1693 | ||
1694 | DEFVAR_INT ("leading-code-private-22", &leading_code_private_22, | |
1695 | "Leading-code of private TYPE9Nx9N charset of column-width 2."); | |
1696 | leading_code_private_22 = LEADING_CODE_PRIVATE_22; | |
35e623fb RS |
1697 | |
1698 | DEFVAR_INT ("nonascii-insert-offset", &nonascii_insert_offset, | |
1699 | "Offset to add to a non-ascii code 0200...0377 when inserting it.\n\ | |
1700 | This applies only when multibyte characters are enabled, and it serves\n\ | |
1701 | to convert a Latin-1 or similar 8-bit character code to the corresponding\n\ | |
1702 | Emacs character code."); | |
1703 | nonascii_insert_offset = 0; | |
b0e3cf2b KH |
1704 | |
1705 | DEFVAR_INT ("min-composite-char", &min_composite_char, | |
1706 | "Minimum character code of a composite character."); | |
1707 | min_composite_char = MIN_CHAR_COMPOSITION; | |
4ed46869 KH |
1708 | } |
1709 | ||
1710 | #endif /* emacs */ |