1 /* Basic multilingual character support.
2 Copyright (C) 1995, 1997 Electrotechnical Laboratory, JAPAN.
3 Licensed to the Free Software Foundation.
5 This file is part of GNU Emacs.
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)
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.
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. */
22 /* At first, see the document in `charset.h' to understand the code in
29 #include <sys/types.h>
43 Lisp_Object Qcharset
, Qascii
, Qcomposition
;
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 */
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) */
63 Lisp_Object Qcharset_table
;
65 /* A char-table containing information of each character set. */
66 Lisp_Object Vcharset_table
;
68 /* A vector of charset symbol indexed by charset-id. This is used
69 only for returning charset symbol from C functions. */
70 Lisp_Object Vcharset_symbol_table
;
72 /* A list of charset symbols ever defined. */
73 Lisp_Object Vcharset_list
;
75 /* Tables used by macros BYTES_BY_CHAR_HEAD and WIDTH_BY_CHAR_HEAD. */
76 int bytes_by_char_head
[256];
77 int width_by_char_head
[256];
79 /* Mapping table from ISO2022's charset (specified by DIMENSION,
80 CHARS, and FINAL-CHAR) to Emacs' charset. */
81 int iso_charset_table
[2][2][128];
83 /* Table of pointers to the structure `cmpchar_info' indexed by
85 struct cmpchar_info
**cmpchar_table
;
86 /* The current size of `cmpchar_table'. */
87 static int cmpchar_table_size
;
88 /* Number of the current composite characters. */
91 /* Variables used locally in the macro FETCH_MULTIBYTE_CHAR. */
92 unsigned char *_fetch_multibyte_char_p
;
93 int _fetch_multibyte_char_len
;
95 #define min(X, Y) ((X) < (Y) ? (X) : (Y))
96 #define max(X, Y) ((X) > (Y) ? (X) : (Y))
98 /* Set STR a pointer to the multi-byte form of the character C. If C
99 is not a composite character, the multi-byte form is set in WORKBUF
100 and STR points WORKBUF. The caller should allocate at least 4-byte
101 area at WORKBUF in advance. Returns the length of the multi-byte
102 form. If C is an invalid character to have a multi-byte form,
105 Use macro `CHAR_STRING (C, WORKBUF, STR)' instead of calling this
106 function directly if C can be an ASCII character. */
109 non_ascii_char_to_string (c
, workbuf
, str
)
111 unsigned char *workbuf
, **str
;
115 if (COMPOSITE_CHAR_P (c
))
117 int cmpchar_id
= COMPOSITE_CHAR_ID (c
);
119 if (cmpchar_id
< n_cmpchars
)
121 *str
= cmpchar_table
[cmpchar_id
]->data
;
122 return cmpchar_table
[cmpchar_id
]->len
;
126 error ("Invalid character: %d", c
);
130 SPLIT_NON_ASCII_CHAR (c
, charset
, c1
, c2
);
132 || ! CHARSET_DEFINED_P (charset
)
133 || c1
>= 0 && c1
< 32
134 || c2
>= 0 && c2
< 32)
135 error ("Invalid character: %d", c
);
138 *workbuf
++ = CHARSET_LEADING_CODE_BASE (charset
);
139 if (*workbuf
= CHARSET_LEADING_CODE_EXT (charset
))
141 *workbuf
++ = c1
| 0x80;
143 *workbuf
++ = c2
| 0x80;
145 return (workbuf
- *str
);
148 /* Return a non-ASCII character of which multi-byte form is at STR of
149 length LEN. If ACTUAL_LEN is not NULL, the actual length of the
150 character is set to the address ACTUAL_LEN.
152 Use macro `STRING_CHAR (STR, LEN)' instead of calling this function
153 directly if STR can hold an ASCII character. */
155 string_to_non_ascii_char (str
, len
, actual_len
)
157 int len
, *actual_len
;
160 unsigned char c1
, c2
;
163 if (SPLIT_STRING (str
, len
, charset
, c1
, c2
) == CHARSET_ASCII
)
170 c
= MAKE_NON_ASCII_CHAR (charset
, c1
, c2
);
173 *actual_len
= (charset
== CHARSET_COMPOSITION
174 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->len
175 : BYTES_BY_CHAR_HEAD (*str
));
179 /* Return the length of the multi-byte form at string STR of length LEN. */
181 multibyte_form_length (str
, len
)
186 unsigned char c1
, c2
;
189 if (SPLIT_STRING (str
, len
, charset
, c1
, c2
) == CHARSET_ASCII
)
192 return (charset
== CHARSET_COMPOSITION
193 ? cmpchar_table
[(c1
<< 7) | c2
]->len
194 : BYTES_BY_CHAR_HEAD (*str
));
197 /* Check if string STR of length LEN contains valid multi-byte form of
198 a character. If valid, charset and position codes of the character
199 is set at *CHARSET, *C1, and *C2, and return 0. If not valid,
200 return -1. This should be used only in the macro SPLIT_STRING
201 which checks range of STR in advance. */
203 split_non_ascii_string (str
, len
, charset
, c1
, c2
)
204 register unsigned char *str
, *c1
, *c2
;
205 register int len
, *charset
;
207 register unsigned int cs
= *str
++;
209 if (cs
== LEADING_CODE_COMPOSITION
)
211 int cmpchar_id
= str_cmpchar_id (str
- 1, len
);
215 *charset
= cs
, *c1
= cmpchar_id
>> 7, *c2
= cmpchar_id
& 0x7F;
217 else if ((cs
< LEADING_CODE_PRIVATE_11
|| (cs
= *str
++) >= 0xA0)
218 && CHARSET_DEFINED_P (cs
))
223 *c1
= (*str
++) & 0x7F;
224 if (CHARSET_DIMENSION (cs
) == 2)
228 *c2
= (*str
++) & 0x7F;
236 /* Return a character unified with C (or a character made of CHARSET,
237 C1, and C2) in unification table TABLE. If no unification is found
238 in TABLE, return C. */
239 unify_char (table
, c
, charset
, c1
, c2
)
241 int c
, charset
, c1
, c2
;
244 int alt_charset
, alt_c1
, alt_c2
, dimension
;
246 if (c
< 0) c
= MAKE_CHAR (charset
, c1
, c2
);
247 if (!CHAR_TABLE_P (table
)
248 || (ch
= Faref (table
, make_number (c
)), !INTEGERP (ch
))
252 SPLIT_CHAR (XFASTINT (ch
), alt_charset
, alt_c1
, alt_c2
);
253 dimension
= CHARSET_DIMENSION (alt_charset
);
254 if (dimension
== 1 && alt_c1
> 0 || dimension
== 2 && alt_c2
> 0)
255 /* CH is not a generic character, just return it. */
256 return XFASTINT (ch
);
258 /* Since CH is a generic character, we must return a specific
259 charater which has the same position codes as C from CH. */
261 SPLIT_CHAR (c
, charset
, c1
, c2
);
262 if (dimension
!= CHARSET_DIMENSION (charset
))
263 /* We can't make such a character because of dimension mismatch. */
265 if (!alt_c1
) alt_c1
= c1
;
266 if (!alt_c2
) alt_c2
= c2
;
267 return MAKE_CHAR (alt_charset
, c1
, c2
);
270 /* Update the table Vcharset_table with the given arguments (see the
271 document of `define-charset' for the meaning of each argument).
272 Several other table contents are also updated. The caller should
273 check the validity of CHARSET-ID and the remaining arguments in
277 update_charset_table (charset_id
, dimension
, chars
, width
, direction
,
278 iso_final_char
, iso_graphic_plane
,
279 short_name
, long_name
, description
)
280 Lisp_Object charset_id
, dimension
, chars
, width
, direction
;
281 Lisp_Object iso_final_char
, iso_graphic_plane
;
282 Lisp_Object short_name
, long_name
, description
;
284 int charset
= XINT (charset_id
);
286 unsigned char leading_code_base
, leading_code_ext
;
288 if (NILP (CHARSET_TABLE_ENTRY (charset
)))
289 CHARSET_TABLE_ENTRY (charset
)
290 = Fmake_vector (make_number (CHARSET_MAX_IDX
), Qnil
);
292 /* Get byte length of multibyte form, base leading-code, and
293 extended leading-code of the charset. See the comment under the
294 title "GENERAL NOTE on CHARACTER SET (CHARSET)" in charset.h. */
295 bytes
= XINT (dimension
);
296 if (charset
< MIN_CHARSET_PRIVATE_DIMENSION1
)
298 /* Official charset, it doesn't have an extended leading-code. */
299 if (charset
!= CHARSET_ASCII
)
300 bytes
+= 1; /* For a base leading-code. */
301 leading_code_base
= charset
;
302 leading_code_ext
= 0;
306 /* Private charset. */
307 bytes
+= 2; /* For base and extended leading-codes. */
309 = (charset
< LEADING_CODE_EXT_12
310 ? LEADING_CODE_PRIVATE_11
311 : (charset
< LEADING_CODE_EXT_21
312 ? LEADING_CODE_PRIVATE_12
313 : (charset
< LEADING_CODE_EXT_22
314 ? LEADING_CODE_PRIVATE_21
315 : LEADING_CODE_PRIVATE_22
)));
316 leading_code_ext
= charset
;
319 CHARSET_TABLE_INFO (charset
, CHARSET_ID_IDX
) = charset_id
;
320 CHARSET_TABLE_INFO (charset
, CHARSET_BYTES_IDX
) = make_number (bytes
);
321 CHARSET_TABLE_INFO (charset
, CHARSET_DIMENSION_IDX
) = dimension
;
322 CHARSET_TABLE_INFO (charset
, CHARSET_CHARS_IDX
) = chars
;
323 CHARSET_TABLE_INFO (charset
, CHARSET_WIDTH_IDX
) = width
;
324 CHARSET_TABLE_INFO (charset
, CHARSET_DIRECTION_IDX
) = direction
;
325 CHARSET_TABLE_INFO (charset
, CHARSET_LEADING_CODE_BASE_IDX
)
326 = make_number (leading_code_base
);
327 CHARSET_TABLE_INFO (charset
, CHARSET_LEADING_CODE_EXT_IDX
)
328 = make_number (leading_code_ext
);
329 CHARSET_TABLE_INFO (charset
, CHARSET_ISO_FINAL_CHAR_IDX
) = iso_final_char
;
330 CHARSET_TABLE_INFO (charset
, CHARSET_ISO_GRAPHIC_PLANE_IDX
)
332 CHARSET_TABLE_INFO (charset
, CHARSET_SHORT_NAME_IDX
) = short_name
;
333 CHARSET_TABLE_INFO (charset
, CHARSET_LONG_NAME_IDX
) = long_name
;
334 CHARSET_TABLE_INFO (charset
, CHARSET_DESCRIPTION_IDX
) = description
;
335 CHARSET_TABLE_INFO (charset
, CHARSET_PLIST_IDX
) = Qnil
;
338 /* If we have already defined a charset which has the same
339 DIMENSION, CHARS and ISO-FINAL-CHAR but the different
340 DIRECTION, we must update the entry REVERSE-CHARSET of both
341 charsets. If there's no such charset, the value of the entry
345 for (i
= 0; i
<= MAX_CHARSET
; i
++)
346 if (!NILP (CHARSET_TABLE_ENTRY (i
)))
348 if (CHARSET_DIMENSION (i
) == XINT (dimension
)
349 && CHARSET_CHARS (i
) == XINT (chars
)
350 && CHARSET_ISO_FINAL_CHAR (i
) == XINT (iso_final_char
)
351 && CHARSET_DIRECTION (i
) != XINT (direction
))
353 CHARSET_TABLE_INFO (charset
, CHARSET_REVERSE_CHARSET_IDX
)
355 CHARSET_TABLE_INFO (i
, CHARSET_REVERSE_CHARSET_IDX
) = charset_id
;
360 /* No such a charset. */
361 CHARSET_TABLE_INFO (charset
, CHARSET_REVERSE_CHARSET_IDX
)
365 if (charset
!= CHARSET_ASCII
366 && charset
< MIN_CHARSET_PRIVATE_DIMENSION1
)
368 /* Update tables bytes_by_char_head and width_by_char_head. */
369 bytes_by_char_head
[leading_code_base
] = bytes
;
370 width_by_char_head
[leading_code_base
] = XINT (width
);
372 /* Update table emacs_code_class. */
373 emacs_code_class
[charset
] = (bytes
== 2
374 ? EMACS_leading_code_2
376 ? EMACS_leading_code_3
377 : EMACS_leading_code_4
));
380 /* Update table iso_charset_table. */
381 if (ISO_CHARSET_TABLE (dimension
, chars
, iso_final_char
) < 0)
382 ISO_CHARSET_TABLE (dimension
, chars
, iso_final_char
) = charset
;
387 /* Return charset id of CHARSET_SYMBOL, or return -1 if CHARSET_SYMBOL
390 get_charset_id (charset_symbol
)
391 Lisp_Object charset_symbol
;
396 return ((SYMBOLP (charset_symbol
)
397 && (val
= Fget (charset_symbol
, Qcharset
), VECTORP (val
))
398 && (charset
= XINT (XVECTOR (val
)->contents
[CHARSET_ID_IDX
]),
399 CHARSET_VALID_P (charset
)))
403 /* Return an identification number for a new private charset of
404 DIMENSION and WIDTH. If there's no more room for the new charset,
407 get_new_private_charset_id (dimension
, width
)
408 int dimension
, width
;
410 int charset
, from
, to
;
415 from
= LEADING_CODE_EXT_11
, to
= LEADING_CODE_EXT_12
;
417 from
= LEADING_CODE_EXT_12
, to
= LEADING_CODE_EXT_21
;
422 from
= LEADING_CODE_EXT_21
, to
= LEADING_CODE_EXT_22
;
424 from
= LEADING_CODE_EXT_22
, to
= LEADING_CODE_EXT_MAX
- 1;
427 for (charset
= from
; charset
< to
; charset
++)
428 if (!CHARSET_DEFINED_P (charset
)) break;
430 return make_number (charset
< to
? charset
: 0);
433 DEFUN ("define-charset", Fdefine_charset
, Sdefine_charset
, 3, 3, 0,
434 "Define CHARSET-ID as the identification number of CHARSET with INFO-VECTOR.\n\
435 If CHARSET-ID is nil, it is decided automatically, which means CHARSET is\n\
436 treated as a private charset.\n\
437 INFO-VECTOR is a vector of the format:\n\
438 [DIMENSION CHARS WIDTH DIRECTION ISO-FINAL-CHAR ISO-GRAPHIC-PLANE\n\
439 SHORT-NAME LONG-NAME DESCRIPTION]\n\
440 The meanings of each elements is as follows:\n\
441 DIMENSION (integer) is the number of bytes to represent a character: 1 or 2.\n\
442 CHARS (integer) is the number of characters in a dimension: 94 or 96.\n\
443 WIDTH (integer) is the number of columns a character in the charset\n\
444 occupies on the screen: one of 0, 1, and 2.\n\
446 DIRECTION (integer) is the rendering direction of characters in the\n\
447 charset when rendering. If 0, render from right to left, else\n\
448 render from left to right.\n\
450 ISO-FINAL-CHAR (character) is the final character of the\n\
451 corresponding ISO 2022 charset.\n\
453 ISO-GRAPHIC-PLANE (integer) is the graphic plane to be invoked\n\
454 while encoding to variants of ISO 2022 coding system, one of the\n\
455 following: 0/graphic-plane-left(GL), 1/graphic-plane-right(GR).\n\
457 SHORT-NAME (string) is the short name to refer to the charset.\n\
459 LONG-NAME (string) is the long name to refer to the charset.\n\
461 DESCRIPTION (string) is the description string of the charset.")
462 (charset_id
, charset_symbol
, info_vector
)
463 Lisp_Object charset_id
, charset_symbol
, info_vector
;
467 if (!NILP (charset_id
))
468 CHECK_NUMBER (charset_id
, 0);
469 CHECK_SYMBOL (charset_symbol
, 1);
470 CHECK_VECTOR (info_vector
, 2);
472 if (! NILP (charset_id
))
474 if (! CHARSET_VALID_P (XINT (charset_id
)))
475 error ("Invalid CHARSET: %d", XINT (charset_id
));
476 else if (CHARSET_DEFINED_P (XINT (charset_id
)))
477 error ("Already defined charset: %d", XINT (charset_id
));
480 vec
= XVECTOR (info_vector
)->contents
;
481 if (XVECTOR (info_vector
)->size
!= 9
482 || !INTEGERP (vec
[0]) || !(XINT (vec
[0]) == 1 || XINT (vec
[0]) == 2)
483 || !INTEGERP (vec
[1]) || !(XINT (vec
[1]) == 94 || XINT (vec
[1]) == 96)
484 || !INTEGERP (vec
[2]) || !(XINT (vec
[2]) == 1 || XINT (vec
[2]) == 2)
485 || !INTEGERP (vec
[3]) || !(XINT (vec
[3]) == 0 || XINT (vec
[3]) == 1)
486 || !INTEGERP (vec
[4]) || !(XINT (vec
[4]) >= '0' && XINT (vec
[4]) <= '~')
487 || !INTEGERP (vec
[5]) || !(XINT (vec
[5]) == 0 || XINT (vec
[5]) == 1)
490 || !STRINGP (vec
[8]))
491 error ("Invalid info-vector argument for defining charset %s",
492 XSYMBOL (charset_symbol
)->name
->data
);
494 if (NILP (charset_id
))
496 charset_id
= get_new_private_charset_id (XINT (vec
[0]), XINT (vec
[2]));
497 if (XINT (charset_id
) == 0)
498 error ("There's no room for a new private charset %s",
499 XSYMBOL (charset_symbol
)->name
->data
);
502 update_charset_table (charset_id
, vec
[0], vec
[1], vec
[2], vec
[3],
503 vec
[4], vec
[5], vec
[6], vec
[7], vec
[8]);
504 Fput (charset_symbol
, Qcharset
, CHARSET_TABLE_ENTRY (XINT (charset_id
)));
505 CHARSET_SYMBOL (XINT (charset_id
)) = charset_symbol
;
506 Vcharset_list
= Fcons (charset_symbol
, Vcharset_list
);
510 DEFUN ("get-unused-iso-final-char", Fget_unused_iso_final_char
,
511 Sget_unused_iso_final_char
, 2, 2, 0,
512 "Return an unsed ISO's final char for a charset of DIMENISION and CHARS.\n\
513 DIMENSION is the number of bytes to represent a character: 1 or 2.\n\
514 CHARS is the number of characters in a dimension: 94 or 96.\n\
516 This final char is for private use, thus the range is `0' (48) .. `?' (63).\n\
517 If there's no unused final char for the specified kind of charset,\n\
520 Lisp_Object dimension
, chars
;
524 CHECK_NUMBER (dimension
, 0);
525 CHECK_NUMBER (chars
, 1);
526 if (XINT (dimension
) != 1 && XINT (dimension
) != 2)
527 error ("Invalid charset dimension %d, it should be 1 or 2",
529 if (XINT (chars
) != 94 && XINT (chars
) != 96)
530 error ("Invalid charset chars %d, it should be 94 or 96",
532 for (final_char
= '0'; final_char
<= '?'; final_char
++)
534 if (ISO_CHARSET_TABLE (dimension
, chars
, make_number (final_char
)) < 0)
537 return (final_char
<= '?' ? make_number (final_char
) : Qnil
);
540 DEFUN ("declare-equiv-charset", Fdeclare_equiv_charset
, Sdeclare_equiv_charset
,
542 "Declare a charset of DIMENSION, CHARS, FINAL-CHAR is the same as CHARSET.\n\
543 CHARSET should be defined by `defined-charset' in advance.")
544 (dimension
, chars
, final_char
, charset_symbol
)
545 Lisp_Object dimension
, chars
, final_char
, charset_symbol
;
549 CHECK_NUMBER (dimension
, 0);
550 CHECK_NUMBER (chars
, 1);
551 CHECK_NUMBER (final_char
, 2);
552 CHECK_SYMBOL (charset_symbol
, 3);
554 if (XINT (dimension
) != 1 && XINT (dimension
) != 2)
555 error ("Invalid DIMENSION %d, it should be 1 or 2", XINT (dimension
));
556 if (XINT (chars
) != 94 && XINT (chars
) != 96)
557 error ("Invalid CHARS %d, it should be 94 or 96", XINT (chars
));
558 if (XINT (final_char
) < '0' || XFASTINT (final_char
) > '~')
559 error ("Invalid FINAL-CHAR %c, it should be `0'..`~'", XINT (chars
));
560 if ((charset
= get_charset_id (charset_symbol
)) < 0)
561 error ("Invalid charset %s", XSYMBOL (charset_symbol
)->name
->data
);
563 ISO_CHARSET_TABLE (dimension
, chars
, final_char
) = charset
;
567 /* Return number of different charsets in STR of length LEN. In
568 addition, for each found charset N, CHARSETS[N] is set 1. The
569 caller should allocate CHARSETS (MAX_CHARSET + 1 elements) in advance.
570 It may lookup a unification table TABLE if supplied. */
573 find_charset_in_str (str
, len
, charsets
, table
)
578 register int num
= 0, c
;
580 if (! CHAR_TABLE_P (table
))
588 if (c
== LEADING_CODE_COMPOSITION
)
590 int cmpchar_id
= str_cmpchar_id (str
, len
);
595 struct cmpchar_info
*cmpcharp
= cmpchar_table
[cmpchar_id
];
598 for (i
= 0; i
< cmpcharp
->glyph_len
; i
++)
600 c
= cmpcharp
->glyph
[i
];
603 if ((c
= unify_char (table
, c
, 0, 0, 0)) < 0)
604 c
= cmpcharp
->glyph
[i
];
606 if ((charset
= CHAR_CHARSET (c
)) < 0)
607 charset
= CHARSET_ASCII
;
608 if (!charsets
[charset
])
610 charsets
[charset
] = 1;
614 str
+= cmpcharp
->len
;
615 len
-= cmpcharp
->len
;
619 charset
= CHARSET_ASCII
;
624 c
= STRING_CHAR_AND_LENGTH (str
, len
, bytes
);
627 int c1
= unify_char (table
, c
, 0, 0, 0);
631 charset
= CHAR_CHARSET (c
);
634 if (!charsets
[charset
])
636 charsets
[charset
] = 1;
645 DEFUN ("find-charset-region", Ffind_charset_region
, Sfind_charset_region
,
647 "Return a list of charsets in the region between BEG and END.\n\
648 BEG and END are buffer positions.\n\
649 Optional arg TABLE if non-nil is a unification table to look up.")
651 Lisp_Object beg
, end
, table
;
653 int charsets
[MAX_CHARSET
+ 1];
654 int from
, to
, stop
, i
;
657 validate_region (&beg
, &end
);
658 from
= XFASTINT (beg
);
659 stop
= to
= XFASTINT (end
);
660 if (from
< GPT
&& GPT
< to
)
662 bzero (charsets
, (MAX_CHARSET
+ 1) * sizeof (int));
665 find_charset_in_str (POS_ADDR (from
), stop
- from
, charsets
, table
);
667 from
= stop
, stop
= to
;
672 for (i
= MAX_CHARSET
; i
>= 0; i
--)
674 val
= Fcons (CHARSET_SYMBOL (i
), val
);
678 DEFUN ("find-charset-string", Ffind_charset_string
, Sfind_charset_string
,
680 "Return a list of charsets in STR.\n\
681 Optional arg TABLE if non-nil is a unification table to look up.")
683 Lisp_Object str
, table
;
685 int charsets
[MAX_CHARSET
+ 1];
689 CHECK_STRING (str
, 0);
690 bzero (charsets
, (MAX_CHARSET
+ 1) * sizeof (int));
691 find_charset_in_str (XSTRING (str
)->data
, XSTRING (str
)->size
,
694 for (i
= MAX_CHARSET
; i
>= 0; i
--)
696 val
= Fcons (CHARSET_SYMBOL (i
), val
);
700 DEFUN ("make-char-internal", Fmake_char_internal
, Smake_char_internal
, 1, 3, 0,
702 (charset
, code1
, code2
)
703 Lisp_Object charset
, code1
, code2
;
705 CHECK_NUMBER (charset
, 0);
708 XSETFASTINT (code1
, 0);
710 CHECK_NUMBER (code1
, 1);
712 XSETFASTINT (code2
, 0);
714 CHECK_NUMBER (code2
, 2);
716 if (!CHARSET_DEFINED_P (XINT (charset
)))
717 error ("Invalid charset: %d", XINT (charset
));
719 return make_number (MAKE_CHAR (XINT (charset
), XINT (code1
), XINT (code2
)));
722 DEFUN ("split-char", Fsplit_char
, Ssplit_char
, 1, 1, 0,
723 "Return list of charset and one or two position-codes of CHAR.")
730 CHECK_NUMBER (ch
, 0);
731 SPLIT_CHAR (XFASTINT (ch
), charset
, c1
, c2
);
733 ? Fcons (CHARSET_SYMBOL (charset
),
734 Fcons (make_number (c1
), Fcons (make_number (c2
), Qnil
)))
735 : Fcons (CHARSET_SYMBOL (charset
), Fcons (make_number (c1
), Qnil
)));
738 DEFUN ("char-charset", Fchar_charset
, Schar_charset
, 1, 1, 0,
739 "Return charset of CHAR.")
743 CHECK_NUMBER (ch
, 0);
745 return CHARSET_SYMBOL (CHAR_CHARSET (XINT (ch
)));
748 DEFUN ("iso-charset", Fiso_charset
, Siso_charset
, 3, 3, 0,
749 "Return charset of ISO's specification DIMENSION, CHARS, and FINAL-CHAR.")
750 (dimension
, chars
, final_char
)
751 Lisp_Object dimension
, chars
, final_char
;
755 CHECK_NUMBER (dimension
, 0);
756 CHECK_NUMBER (chars
, 1);
757 CHECK_NUMBER (final_char
, 2);
759 if ((charset
= ISO_CHARSET_TABLE (dimension
, chars
, final_char
)) < 0)
761 return CHARSET_SYMBOL (charset
);
764 /* If GENERICP is nonzero, return nonzero iff C is a valid normal or
765 generic character. If GENERICP is zero, return nonzero iff C is a
766 valid normal character. Do not call this function directly,
767 instead use macro CHAR_VALID_P. */
769 char_valid_p (c
, genericp
)
776 if (SINGLE_BYTE_CHAR_P (c
))
778 SPLIT_NON_ASCII_CHAR (c
, charset
, c1
, c2
);
779 if (!CHARSET_VALID_P (charset
))
781 return (c
< MIN_CHAR_COMPOSITION
782 ? ((c
& CHAR_FIELD1_MASK
) /* i.e. dimension of C is two. */
783 ? (genericp
&& c1
== 0 && c2
== 0
784 || c1
>= 32 && c2
>= 32)
785 : (genericp
&& c1
== 0
787 : c
< MIN_CHAR_COMPOSITION
+ n_cmpchars
);
790 DEFUN ("char-valid-p", Fchar_valid_p
, Schar_valid_p
, 1, 2, 0,
791 "Return t if OBJECT is a valid normal character.
792 If optional arg GENERICP is non-nil, also return t if OBJECT is
793 a valid generic character.")
795 Lisp_Object object
, genericp
;
797 if (! NATNUMP (object
))
799 return (CHAR_VALID_P (XFASTINT (object
), !NILP (genericp
)) ? Qt
: Qnil
);
802 DEFUN ("char-bytes", Fchar_bytes
, Schar_bytes
, 1, 1, 0,
803 "Return byte length of multi-byte form of CHAR.")
810 CHECK_NUMBER (ch
, 0);
811 if (COMPOSITE_CHAR_P (XFASTINT (ch
)))
813 unsigned int id
= COMPOSITE_CHAR_ID (XFASTINT (ch
));
815 bytes
= (id
< n_cmpchars
? cmpchar_table
[id
]->len
: 1);
819 int charset
= CHAR_CHARSET (XFASTINT (ch
));
821 bytes
= CHARSET_DEFINED_P (charset
) ? CHARSET_BYTES (charset
) : 1;
824 XSETFASTINT (val
, bytes
);
828 /* Return the width of character of which multi-byte form starts with
829 C. The width is measured by how many columns occupied on the
830 screen when displayed in the current buffer. */
832 #define ONE_BYTE_CHAR_WIDTH(c) \
835 ? XFASTINT (current_buffer->tab_width) \
836 : (c == '\n' ? 0 : (NILP (current_buffer->ctl_arrow) ? 4 : 2))) \
840 ? (NILP (current_buffer->ctl_arrow) ? 4 : 2) \
841 : ((! NILP (current_buffer->enable_multibyte_characters) \
842 && BASE_LEADING_CODE_P (c)) \
843 ? WIDTH_BY_CHAR_HEAD (c) \
847 DEFUN ("char-width", Fchar_width, Schar_width, 1, 1, 0,
848 "Return width of CHAR when displayed in the current buffer.\n\
849 The width is measured by how many columns it occupies on the screen.")
853 Lisp_Object val
, disp
;
855 struct Lisp_Char_Table
*dp
= buffer_display_table ();
857 CHECK_NUMBER (ch
, 0);
861 /* Get the way the display table would display it. */
862 disp
= dp
? DISP_CHAR_VECTOR (dp
, c
) : Qnil
;
865 XSETINT (val
, XVECTOR (disp
)->size
);
866 else if (SINGLE_BYTE_CHAR_P (c
))
867 XSETINT (val
, ONE_BYTE_CHAR_WIDTH (c
));
868 else if (COMPOSITE_CHAR_P (c
))
870 int id
= COMPOSITE_CHAR_ID (XFASTINT (ch
));
871 XSETFASTINT (val
, (id
< n_cmpchars
? cmpchar_table
[id
]->width
: 0));
875 int charset
= CHAR_CHARSET (c
);
877 XSETFASTINT (val
, CHARSET_WIDTH (charset
));
882 /* Return width of string STR of length LEN when displayed in the
883 current buffer. The width is measured by how many columns it
884 occupies on the screen. */
891 unsigned char *endp
= str
+ len
;
893 struct Lisp_Char_Table
*dp
= buffer_display_table ();
897 if (*str
== LEADING_CODE_COMPOSITION
)
899 int id
= str_cmpchar_id (str
, endp
- str
);
908 width
+= cmpchar_table
[id
]->width
;
909 str
+= cmpchar_table
[id
]->len
;
916 int c
= STRING_CHAR (str
, endp
- str
);
918 /* Get the way the display table would display it. */
920 disp
= DISP_CHAR_VECTOR (dp
, c
);
925 thiswidth
= XVECTOR (disp
)->size
;
927 thiswidth
= ONE_BYTE_CHAR_WIDTH (*str
);
930 str
+= BYTES_BY_CHAR_HEAD (*str
);
936 DEFUN ("string-width", Fstring_width
, Sstring_width
, 1, 1, 0,
937 "Return width of STRING when displayed in the current buffer.\n\
938 Width is measured by how many columns it occupies on the screen.\n\
939 When calculating width of a multibyte character in STRING,\n\
940 only the base leading-code is considered; the validity of\n\
941 the following bytes is not checked.")
947 CHECK_STRING (str
, 0);
948 XSETFASTINT (val
, strwidth (XSTRING (str
)->data
, XSTRING (str
)->size
));
952 DEFUN ("char-direction", Fchar_direction
, Schar_direction
, 1, 1, 0,
953 "Return the direction of CHAR.\n\
954 The returned value is 0 for left-to-right and 1 for right-to-left.")
960 CHECK_NUMBER (ch
, 0);
961 charset
= CHAR_CHARSET (XFASTINT (ch
));
962 if (!CHARSET_DEFINED_P (charset
))
963 error ("Invalid character: %d", XINT (ch
));
964 return CHARSET_TABLE_INFO (charset
, CHARSET_DIRECTION_IDX
);
967 DEFUN ("chars-in-string", Fchars_in_string
, Schars_in_string
, 1, 1, 0,
968 "Return number of characters in STRING.\n\
969 When using multibyte characters, this is not the necessarily same as\n\
970 the length of STRING; the length counts a multibyte characters as\n\
971 several bytes, but this function counts a multibyte character as one\n\
977 unsigned char *p
, *endp
;
980 CHECK_STRING (str
, 0);
982 if (NILP (current_buffer
->enable_multibyte_characters
))
983 return make_number (XSTRING (str
)->size
);
985 p
= XSTRING (str
)->data
; endp
= p
+ XSTRING (str
)->size
;
989 if (*p
== LEADING_CODE_COMPOSITION
)
992 while (p
< endp
&& ! CHAR_HEAD_P (p
)) p
++;
995 p
+= BYTES_BY_CHAR_HEAD (*p
);
999 XSETFASTINT (val
, chars
);
1003 DEFUN ("chars-in-region", Fchars_in_region
, Schars_in_region
, 2, 2, 0,
1004 "Return number of characters between BEG and END.\n\
1005 When using multibyte characters, this is not the necessarily same\n\
1006 as (- END BEG); that subtraction gives you the number of bytes, which\n\
1007 may be more than the number of characters.")
1009 Lisp_Object beg
, end
;
1014 unsigned char *p
, *endp
;
1016 validate_region (&beg
, &end
);
1018 from
= min (XFASTINT (beg
), XFASTINT (end
));
1019 to
= max (XFASTINT (beg
), XFASTINT (end
));
1020 p
= POS_ADDR (from
);
1022 if (NILP (current_buffer
->enable_multibyte_characters
))
1023 return make_number (to
- from
);
1025 if (from
< GPT
&& GPT
<= to
)
1033 endp
= POS_ADDR (stop
);
1043 p
= POS_ADDR (stop
);
1045 endp
= POS_ADDR (stop
);
1048 if (*p
== LEADING_CODE_COMPOSITION
)
1051 while (p
< endp
&& ! CHAR_HEAD_P (p
)) p
++;
1054 p
+= BYTES_BY_CHAR_HEAD (*p
);
1059 return make_number (chars
);
1062 DEFUN ("char-boundary-p", Fchar_boundary_p
, Schar_boundary_p
, 1, 1, 0,
1063 "Return non-nil value if POS is at character boundary of multibyte form.\n\
1064 When the value is non-nil, it contains some additional information:\n\
1065 0 if POS is at an ASCII character or at the end of range,\n\
1066 1 if POS is before a 2-byte length multi-byte form,\n\
1067 2 if POS is before a 3-byte length multi-byte form,\n\
1068 3 if POS is before a 4-byte length multi-byte form,\n\
1069 4 if POS is before a composite character.\n\
1070 If POS is out of range or not at character boundary, return NIL.")
1077 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1080 if (n
< BEGV
|| n
> ZV
)
1083 if (n
== ZV
|| NILP (current_buffer
->enable_multibyte_characters
))
1084 XSETFASTINT (val
, 0);
1087 unsigned char *p
= POS_ADDR (n
);
1089 if (SINGLE_BYTE_CHAR_P (*p
))
1090 XSETFASTINT (val
, 0);
1091 else if (*p
== LEADING_CODE_COMPOSITION
)
1092 XSETFASTINT (val
, 4);
1093 else if (BYTES_BY_CHAR_HEAD (*p
) > 1)
1094 XSETFASTINT (val
, BYTES_BY_CHAR_HEAD (*p
) - 1);
1101 DEFUN ("concat-chars", Fconcat_chars
, Sconcat_chars
, 1, MANY
, 0,
1102 "Concatenate all the argument characters and make the result a string.")
1109 = (unsigned char *) alloca (MAX_LENGTH_OF_MULTI_BYTE_FORM
* n
);
1110 unsigned char *p
= buf
;
1113 for (i
= 0; i
< n
; i
++)
1118 if (!INTEGERP (args
[i
]))
1121 CHECK_NUMBER (args
[i
], 0);
1124 len
= CHAR_STRING (c
, p
, str
);
1126 /* C is a composite character. */
1127 bcopy (str
, p
, len
);
1131 val
= make_string (buf
, p
- buf
);
1137 /*** Composite characters staffs ***/
1139 /* Each composite character is identified by CMPCHAR-ID which is
1140 assigned when Emacs needs the character code of the composite
1141 character (e.g. when displaying it on the screen). See the
1142 document "GENERAL NOTE on COMPOSITE CHARACTER" in `charset.h' how a
1143 composite character is represented in Emacs. */
1145 /* If `static' is defined, it means that it is defined to null string. */
1147 /* The following function is copied from lread.c. */
1149 hash_string (ptr
, len
)
1153 register unsigned char *p
= ptr
;
1154 register unsigned char *end
= p
+ len
;
1155 register unsigned char c
;
1156 register int hash
= 0;
1161 if (c
>= 0140) c
-= 40;
1162 hash
= ((hash
<<3) + (hash
>>28) + c
);
1164 return hash
& 07777777777;
1168 #define CMPCHAR_HASH_TABLE_SIZE 0xFFF
1170 static int *cmpchar_hash_table
[CMPCHAR_HASH_TABLE_SIZE
];
1172 /* Each element of `cmpchar_hash_table' is a pointer to an array of
1173 integer, where the 1st element is the size of the array, the 2nd
1174 element is how many elements are actually used in the array, and
1175 the remaining elements are CMPCHAR-IDs of composite characters of
1176 the same hash value. */
1177 #define CMPCHAR_HASH_SIZE(table) table[0]
1178 #define CMPCHAR_HASH_USED(table) table[1]
1179 #define CMPCHAR_HASH_CMPCHAR_ID(table, i) table[i]
1181 /* Return CMPCHAR-ID of the composite character in STR of the length
1182 LEN. If the composite character has not yet been registered,
1183 register it in `cmpchar_table' and assign new CMPCHAR-ID. This
1184 is the sole function for assigning CMPCHAR-ID. */
1186 str_cmpchar_id (str
, len
)
1190 int hash_idx
, *hashp
;
1192 int embedded_rule
; /* 1 if composition rule is embedded. */
1193 int chars
; /* number of components. */
1195 struct cmpchar_info
*cmpcharp
;
1198 /* Any composite char have at least 3-byte length. */
1201 /* The second byte 0xFF means compostion rule is embedded. */
1202 embedded_rule
= (str
[1] == 0xFF);
1204 /* At first, get the actual length of the composite character. */
1206 unsigned char *p
, *endp
= str
+ 1, *lastp
= str
+ len
;
1209 while (endp
< lastp
&& ! CHAR_HEAD_P (endp
)) endp
++;
1211 p
= str
+ 1 + embedded_rule
;
1214 /* No need of checking if *P is 0xA0 because
1215 BYTES_BY_CHAR_HEAD (0x80) surely returns 2. */
1216 p
+= (bytes
= BYTES_BY_CHAR_HEAD (*p
- 0x20) + embedded_rule
);
1219 len
= (p
-= embedded_rule
) - str
;
1221 len
-= - bytes
, chars
--;
1223 if (chars
< 2 || chars
> MAX_COMPONENT_COUNT
)
1224 /* Invalid number of components. */
1227 hash_idx
= hash_string (str
, len
) % CMPCHAR_HASH_TABLE_SIZE
;
1228 hashp
= cmpchar_hash_table
[hash_idx
];
1230 /* Then, look into the hash table. */
1232 /* Find the correct one among composite characters of the same
1234 for (i
= 2; i
< CMPCHAR_HASH_USED (hashp
); i
++)
1236 cmpcharp
= cmpchar_table
[CMPCHAR_HASH_CMPCHAR_ID (hashp
, i
)];
1237 if (len
== cmpcharp
->len
1238 && ! bcmp (str
, cmpcharp
->data
, len
))
1239 return CMPCHAR_HASH_CMPCHAR_ID (hashp
, i
);
1242 /* We have to register the composite character in cmpchar_table. */
1243 if (n_cmpchars
> (CHAR_FIELD2_MASK
| CHAR_FIELD3_MASK
))
1244 /* No, we have no more room for a new composite character. */
1247 /* Make the entry in hash table. */
1250 /* Make a table for 8 composite characters initially. */
1251 hashp
= (cmpchar_hash_table
[hash_idx
]
1252 = (int *) xmalloc (sizeof (int) * (2 + 8)));
1253 CMPCHAR_HASH_SIZE (hashp
) = 10;
1254 CMPCHAR_HASH_USED (hashp
) = 2;
1256 else if (CMPCHAR_HASH_USED (hashp
) >= CMPCHAR_HASH_SIZE (hashp
))
1258 CMPCHAR_HASH_SIZE (hashp
) += 8;
1259 hashp
= (cmpchar_hash_table
[hash_idx
]
1260 = (int *) xrealloc (hashp
,
1261 sizeof (int) * CMPCHAR_HASH_SIZE (hashp
)));
1263 CMPCHAR_HASH_CMPCHAR_ID (hashp
, CMPCHAR_HASH_USED (hashp
)) = n_cmpchars
;
1264 CMPCHAR_HASH_USED (hashp
)++;
1266 /* Set information of the composite character in cmpchar_table. */
1267 if (cmpchar_table_size
== 0)
1269 /* This is the first composite character to be registered. */
1270 cmpchar_table_size
= 256;
1272 = (struct cmpchar_info
**) xmalloc (sizeof (cmpchar_table
[0])
1273 * cmpchar_table_size
);
1275 else if (cmpchar_table_size
<= n_cmpchars
)
1277 cmpchar_table_size
+= 256;
1279 = (struct cmpchar_info
**) xrealloc (cmpchar_table
,
1280 sizeof (cmpchar_table
[0])
1281 * cmpchar_table_size
);
1284 cmpcharp
= (struct cmpchar_info
*) xmalloc (sizeof (struct cmpchar_info
));
1286 cmpcharp
->len
= len
;
1287 cmpcharp
->data
= (unsigned char *) xmalloc (len
+ 1);
1288 bcopy (str
, cmpcharp
->data
, len
);
1289 cmpcharp
->data
[len
] = 0;
1290 cmpcharp
->glyph_len
= chars
;
1291 cmpcharp
->glyph
= (GLYPH
*) xmalloc (sizeof (GLYPH
) * chars
);
1294 cmpcharp
->cmp_rule
= (unsigned char *) xmalloc (chars
);
1295 cmpcharp
->col_offset
= (float *) xmalloc (sizeof (float) * chars
);
1299 cmpcharp
->cmp_rule
= NULL
;
1300 cmpcharp
->col_offset
= NULL
;
1303 /* Setup GLYPH data and composition rules (if any) so as not to make
1304 them every time on displaying. */
1306 unsigned char *bufp
;
1308 float leftmost
= 0.0, rightmost
= 1.0;
1311 /* At first, col_offset[N] is set to relative to col_offset[0]. */
1312 cmpcharp
->col_offset
[0] = 0;
1314 for (i
= 0, bufp
= cmpcharp
->data
+ 1; i
< chars
; i
++)
1317 cmpcharp
->cmp_rule
[i
] = *bufp
++;
1319 if (*bufp
== 0xA0) /* This is an ASCII character. */
1321 cmpcharp
->glyph
[i
] = FAST_MAKE_GLYPH ((*++bufp
& 0x7F), 0);
1325 else /* Multibyte character. */
1327 /* Make `bufp' point normal multi-byte form temporally. */
1330 = FAST_MAKE_GLYPH (string_to_non_ascii_char (bufp
, 4, 0), 0);
1331 width
= WIDTH_BY_CHAR_HEAD (*bufp
);
1333 bufp
+= BYTES_BY_CHAR_HEAD (*bufp
- 0x20);
1336 if (embedded_rule
&& i
> 0)
1338 /* Reference points (global_ref and new_ref) are
1349 Now, we calculate the column offset of the new glyph
1350 from the left edge of the first glyph. This can avoid
1351 the same calculation everytime displaying this
1352 composite character. */
1354 /* Reference points of global glyph and new glyph. */
1355 int global_ref
= (cmpcharp
->cmp_rule
[i
] - 0xA0) / 9;
1356 int new_ref
= (cmpcharp
->cmp_rule
[i
] - 0xA0) % 9;
1357 /* Column offset relative to the first glyph. */
1358 float left
= (leftmost
1359 + (global_ref
% 3) * (rightmost
- leftmost
) / 2.0
1360 - (new_ref
% 3) * width
/ 2.0);
1362 cmpcharp
->col_offset
[i
] = left
;
1363 if (left
< leftmost
)
1365 if (left
+ width
> rightmost
)
1366 rightmost
= left
+ width
;
1370 if (width
> rightmost
)
1376 /* Now col_offset[N] are relative to the left edge of the
1377 first component. Make them relative to the left edge of
1379 for (i
= 0; i
< chars
; i
++)
1380 cmpcharp
->col_offset
[i
] -= leftmost
;
1381 /* Make rightmost holds width of overall glyph. */
1382 rightmost
-= leftmost
;
1385 cmpcharp
->width
= rightmost
;
1386 if (cmpcharp
->width
< rightmost
)
1387 /* To get a ceiling integer value. */
1391 cmpchar_table
[n_cmpchars
] = cmpcharp
;
1393 return n_cmpchars
++;
1396 /* Return the Nth element of the composite character C. */
1398 cmpchar_component (c
, n
)
1401 int id
= COMPOSITE_CHAR_ID (c
);
1403 if (id
>= n_cmpchars
/* C is not a valid composite character. */
1404 || n
>= cmpchar_table
[id
]->glyph_len
) /* No such component. */
1406 /* No face data is stored in glyph code. */
1407 return ((int) (cmpchar_table
[id
]->glyph
[n
]));
1410 DEFUN ("cmpcharp", Fcmpcharp
, Scmpcharp
, 1, 1, 0,
1411 "T if CHAR is a composite character.")
1415 CHECK_NUMBER (ch
, 0);
1416 return (COMPOSITE_CHAR_P (XINT (ch
)) ? Qt
: Qnil
);
1419 DEFUN ("composite-char-component", Fcmpchar_component
, Scmpchar_component
,
1421 "Return the IDXth component character of composite character CHARACTER.")
1423 Lisp_Object character
, idx
;
1427 CHECK_NUMBER (character
, 0);
1428 CHECK_NUMBER (idx
, 1);
1430 if ((c
= cmpchar_component (XINT (character
), XINT (idx
))) < 0)
1431 args_out_of_range (character
, idx
);
1433 return make_number (c
);
1436 DEFUN ("composite-char-composition-rule", Fcmpchar_cmp_rule
, Scmpchar_cmp_rule
,
1438 "Return the Nth composition rule embedded in composite character CHARACTER.\n\
1439 The returned rule is for composing the Nth component\n\
1440 on the (N-1)th component. If N is 0, the returned value is always 255.")
1442 Lisp_Object character
, n
;
1446 CHECK_NUMBER (character
, 0);
1447 CHECK_NUMBER (n
, 1);
1449 id
= COMPOSITE_CHAR_ID (XINT (character
));
1450 if (id
< 0 || id
>= n_cmpchars
)
1451 error ("Invalid composite character: %d", XINT (character
));
1453 if (i
> cmpchar_table
[id
]->glyph_len
)
1454 args_out_of_range (character
, n
);
1456 return make_number (cmpchar_table
[id
]->cmp_rule
[i
]);
1459 DEFUN ("composite-char-composition-rule-p", Fcmpchar_cmp_rule_p
,
1460 Scmpchar_cmp_rule_p
, 1, 1, 0,
1461 "Return non-nil if composite character CHARACTER contains a embedded rule.")
1463 Lisp_Object character
;
1467 CHECK_NUMBER (character
, 0);
1468 id
= COMPOSITE_CHAR_ID (XINT (character
));
1469 if (id
< 0 || id
>= n_cmpchars
)
1470 error ("Invalid composite character: %d", XINT (character
));
1472 return (cmpchar_table
[id
]->cmp_rule
? Qt
: Qnil
);
1475 DEFUN ("composite-char-component-count", Fcmpchar_cmp_count
,
1476 Scmpchar_cmp_count
, 1, 1, 0,
1477 "Return number of compoents of composite character CHARACTER.")
1479 Lisp_Object character
;
1483 CHECK_NUMBER (character
, 0);
1484 id
= COMPOSITE_CHAR_ID (XINT (character
));
1485 if (id
< 0 || id
>= n_cmpchars
)
1486 error ("Invalid composite character: %d", XINT (character
));
1488 return (make_number (cmpchar_table
[id
]->glyph_len
));
1491 DEFUN ("compose-string", Fcompose_string
, Scompose_string
,
1493 "Return one char string composed from all characters in STRING.")
1497 unsigned char buf
[MAX_LENGTH_OF_MULTI_BYTE_FORM
], *p
, *pend
, *ptemp
;
1500 CHECK_STRING (str
, 0);
1502 buf
[0] = LEADING_CODE_COMPOSITION
;
1503 p
= XSTRING (str
)->data
;
1504 pend
= p
+ XSTRING (str
)->size
;
1508 if (*p
< 0x20 || *p
== 127) /* control code */
1509 error ("Invalid component character: %d", *p
);
1510 else if (*p
< 0x80) /* ASCII */
1512 if (i
+ 2 >= MAX_LENGTH_OF_MULTI_BYTE_FORM
)
1513 error ("Too long string to be composed: %s", XSTRING (str
)->data
);
1514 /* Prepend an ASCII charset indicator 0xA0, set MSB of the
1517 buf
[i
++] = *p
++ + 0x80;
1519 else if (*p
== LEADING_CODE_COMPOSITION
) /* composite char */
1521 /* Already composed. Eliminate the heading
1522 LEADING_CODE_COMPOSITION, keep the remaining bytes
1526 while (! CHAR_HEAD_P (p
)) p
++;
1527 if (i
+ (p
- ptemp
) >= MAX_LENGTH_OF_MULTI_BYTE_FORM
)
1528 error ("Too long string to be composed: %s", XSTRING (str
)->data
);
1529 bcopy (ptemp
, buf
+ i
, p
- ptemp
);
1532 else /* multibyte char */
1534 /* Add 0x20 to the base leading-code, keep the remaining
1536 len
= BYTES_BY_CHAR_HEAD (*p
);
1537 if (i
+ len
>= MAX_LENGTH_OF_MULTI_BYTE_FORM
)
1538 error ("Too long string to be composed: %s", XSTRING (str
)->data
);
1539 bcopy (p
, buf
+ i
, len
);
1546 /* STR contains only one character, which can't be composed. */
1547 error ("Too short string to be composed: %s", XSTRING (str
)->data
);
1549 return make_string (buf
, i
);
1553 charset_id_internal (charset_name
)
1556 Lisp_Object val
= Fget (intern (charset_name
), Qcharset
);
1559 error ("Charset %s is not defined", charset_name
);
1561 return (XINT (XVECTOR (val
)->contents
[0]));
1564 DEFUN ("setup-special-charsets", Fsetup_special_charsets
,
1565 Ssetup_special_charsets
, 0, 0, 0, "Internal use only.")
1568 charset_latin_iso8859_1
= charset_id_internal ("latin-iso8859-1");
1569 charset_jisx0208_1978
= charset_id_internal ("japanese-jisx0208-1978");
1570 charset_jisx0208
= charset_id_internal ("japanese-jisx0208");
1571 charset_katakana_jisx0201
= charset_id_internal ("katakana-jisx0201");
1572 charset_latin_jisx0201
= charset_id_internal ("latin-jisx0201");
1573 charset_big5_1
= charset_id_internal ("chinese-big5-1");
1574 charset_big5_2
= charset_id_internal ("chinese-big5-2");
1578 init_charset_once ()
1582 staticpro (&Vcharset_table
);
1583 staticpro (&Vcharset_symbol_table
);
1585 /* This has to be done here, before we call Fmake_char_table. */
1586 Qcharset_table
= intern ("charset-table");
1587 staticpro (&Qcharset_table
);
1589 /* Intern this now in case it isn't already done.
1590 Setting this variable twice is harmless.
1591 But don't staticpro it here--that is done in alloc.c. */
1592 Qchar_table_extra_slots
= intern ("char-table-extra-slots");
1594 /* Now we are ready to set up this property, so we can
1595 create the charset table. */
1596 Fput (Qcharset_table
, Qchar_table_extra_slots
, make_number (0));
1597 Vcharset_table
= Fmake_char_table (Qcharset_table
, Qnil
);
1599 Vcharset_symbol_table
= Fmake_vector (make_number (MAX_CHARSET
+ 1), Qnil
);
1602 for (i
= 0; i
< 2; i
++)
1603 for (j
= 0; j
< 2; j
++)
1604 for (k
= 0; k
< 128; k
++)
1605 iso_charset_table
[i
][j
][k
] = -1;
1607 bzero (cmpchar_hash_table
, sizeof cmpchar_hash_table
);
1608 cmpchar_table_size
= n_cmpchars
= 0;
1610 for (i
= 0; i
< 256; i
++)
1611 BYTES_BY_CHAR_HEAD (i
) = 1;
1612 BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_11
) = 3;
1613 BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_12
) = 3;
1614 BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_21
) = 4;
1615 BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_22
) = 4;
1616 /* The following doesn't reflect the actual bytes, but just to tell
1617 that it is a start of a multibyte character. */
1618 BYTES_BY_CHAR_HEAD (LEADING_CODE_COMPOSITION
) = 2;
1620 for (i
= 0; i
< 128; i
++)
1621 WIDTH_BY_CHAR_HEAD (i
) = 1;
1622 for (; i
< 256; i
++)
1623 WIDTH_BY_CHAR_HEAD (i
) = 4;
1624 WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_11
) = 1;
1625 WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_12
) = 2;
1626 WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_21
) = 1;
1627 WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_22
) = 2;
1634 Qascii
= intern ("ascii");
1635 staticpro (&Qascii
);
1637 Qcharset
= intern ("charset");
1638 staticpro (&Qcharset
);
1640 /* Define ASCII charset now. */
1641 update_charset_table (make_number (CHARSET_ASCII
),
1642 make_number (1), make_number (94),
1647 build_string ("ASCII"),
1648 build_string ("ASCII"),
1649 build_string ("ASCII (ISO646 IRV)"));
1650 CHARSET_SYMBOL (CHARSET_ASCII
) = Qascii
;
1651 Fput (Qascii
, Qcharset
, CHARSET_TABLE_ENTRY (CHARSET_ASCII
));
1653 Qcomposition
= intern ("composition");
1654 staticpro (&Qcomposition
);
1655 CHARSET_SYMBOL (CHARSET_COMPOSITION
) = Qcomposition
;
1657 defsubr (&Sdefine_charset
);
1658 defsubr (&Sget_unused_iso_final_char
);
1659 defsubr (&Sdeclare_equiv_charset
);
1660 defsubr (&Sfind_charset_region
);
1661 defsubr (&Sfind_charset_string
);
1662 defsubr (&Smake_char_internal
);
1663 defsubr (&Ssplit_char
);
1664 defsubr (&Schar_charset
);
1665 defsubr (&Siso_charset
);
1666 defsubr (&Schar_valid_p
);
1667 defsubr (&Schar_bytes
);
1668 defsubr (&Schar_width
);
1669 defsubr (&Sstring_width
);
1670 defsubr (&Schar_direction
);
1671 defsubr (&Schars_in_string
);
1672 defsubr (&Schars_in_region
);
1673 defsubr (&Schar_boundary_p
);
1674 defsubr (&Sconcat_chars
);
1675 defsubr (&Scmpcharp
);
1676 defsubr (&Scmpchar_component
);
1677 defsubr (&Scmpchar_cmp_rule
);
1678 defsubr (&Scmpchar_cmp_rule_p
);
1679 defsubr (&Scmpchar_cmp_count
);
1680 defsubr (&Scompose_string
);
1681 defsubr (&Ssetup_special_charsets
);
1683 DEFVAR_LISP ("charset-list", &Vcharset_list
,
1684 "List of charsets ever defined.");
1685 Vcharset_list
= Fcons (Qascii
, Qnil
);
1687 DEFVAR_INT ("leading-code-composition", &leading_code_composition
,
1688 "Leading-code of composite characters.");
1689 leading_code_composition
= LEADING_CODE_COMPOSITION
;
1691 DEFVAR_INT ("leading-code-private-11", &leading_code_private_11
,
1692 "Leading-code of private TYPE9N charset of column-width 1.");
1693 leading_code_private_11
= LEADING_CODE_PRIVATE_11
;
1695 DEFVAR_INT ("leading-code-private-12", &leading_code_private_12
,
1696 "Leading-code of private TYPE9N charset of column-width 2.");
1697 leading_code_private_12
= LEADING_CODE_PRIVATE_12
;
1699 DEFVAR_INT ("leading-code-private-21", &leading_code_private_21
,
1700 "Leading-code of private TYPE9Nx9N charset of column-width 1.");
1701 leading_code_private_21
= LEADING_CODE_PRIVATE_21
;
1703 DEFVAR_INT ("leading-code-private-22", &leading_code_private_22
,
1704 "Leading-code of private TYPE9Nx9N charset of column-width 2.");
1705 leading_code_private_22
= LEADING_CODE_PRIVATE_22
;