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 ("declare-equiv-charset", Fdeclare_equiv_charset
, Sdeclare_equiv_charset
,
512 "Declare a charset of DIMENSION, CHARS, FINAL-CHAR is the same as CHARSET.\n\
513 CHARSET should be defined by `defined-charset' in advance.")
514 (dimension
, chars
, final_char
, charset_symbol
)
515 Lisp_Object dimension
, chars
, final_char
, charset_symbol
;
519 CHECK_NUMBER (dimension
, 0);
520 CHECK_NUMBER (chars
, 1);
521 CHECK_NUMBER (final_char
, 2);
522 CHECK_SYMBOL (charset_symbol
, 3);
524 if (XINT (dimension
) != 1 && XINT (dimension
) != 2)
525 error ("Invalid DIMENSION %d, it should be 1 or 2", XINT (dimension
));
526 if (XINT (chars
) != 94 && XINT (chars
) != 96)
527 error ("Invalid CHARS %d, it should be 94 or 96", XINT (chars
));
528 if (XINT (final_char
) < '0' || XFASTINT (final_char
) > '~')
529 error ("Invalid FINAL-CHAR %c, it should be `0'..`~'", XINT (chars
));
530 if ((charset
= get_charset_id (charset_symbol
)) < 0)
531 error ("Invalid charset %s", XSYMBOL (charset_symbol
)->name
->data
);
533 ISO_CHARSET_TABLE (dimension
, chars
, final_char
) = charset
;
537 /* Return number of different charsets in STR of length LEN. In
538 addition, for each found charset N, CHARSETS[N] is set 1. The
539 caller should allocate CHARSETS (MAX_CHARSET + 1 elements) in advance.
540 It may lookup a unification table TABLE if supplied. */
543 find_charset_in_str (str
, len
, charsets
, table
)
548 register int num
= 0, c
;
550 if (! CHAR_TABLE_P (table
))
558 if (c
== LEADING_CODE_COMPOSITION
)
560 int cmpchar_id
= str_cmpchar_id (str
, len
);
565 struct cmpchar_info
*cmpcharp
= cmpchar_table
[cmpchar_id
];
568 for (i
= 0; i
< cmpcharp
->glyph_len
; i
++)
570 c
= cmpcharp
->glyph
[i
];
573 if ((c
= unify_char (table
, c
, 0, 0, 0)) < 0)
574 c
= cmpcharp
->glyph
[i
];
576 if ((charset
= CHAR_CHARSET (c
)) < 0)
577 charset
= CHARSET_ASCII
;
578 if (!charsets
[charset
])
580 charsets
[charset
] = 1;
584 str
+= cmpcharp
->len
;
585 len
-= cmpcharp
->len
;
589 charset
= CHARSET_ASCII
;
594 c
= STRING_CHAR_AND_LENGTH (str
, len
, bytes
);
597 int c1
= unify_char (table
, c
, 0, 0, 0);
601 charset
= CHAR_CHARSET (c
);
604 if (!charsets
[charset
])
606 charsets
[charset
] = 1;
615 DEFUN ("find-charset-region", Ffind_charset_region
, Sfind_charset_region
,
617 "Return a list of charsets in the region between BEG and END.\n\
618 BEG and END are buffer positions.\n\
619 Optional arg TABLE if non-nil is a unification table to look up.")
621 Lisp_Object beg
, end
, table
;
623 int charsets
[MAX_CHARSET
+ 1];
624 int from
, to
, stop
, i
;
627 validate_region (&beg
, &end
);
628 from
= XFASTINT (beg
);
629 stop
= to
= XFASTINT (end
);
630 if (from
< GPT
&& GPT
< to
)
632 bzero (charsets
, (MAX_CHARSET
+ 1) * sizeof (int));
635 find_charset_in_str (POS_ADDR (from
), stop
- from
, charsets
, table
);
637 from
= stop
, stop
= to
;
642 for (i
= MAX_CHARSET
; i
>= 0; i
--)
644 val
= Fcons (CHARSET_SYMBOL (i
), val
);
648 DEFUN ("find-charset-string", Ffind_charset_string
, Sfind_charset_string
,
650 "Return a list of charsets in STR.\n\
651 Optional arg TABLE if non-nil is a unification table to look up.")
653 Lisp_Object str
, table
;
655 int charsets
[MAX_CHARSET
+ 1];
659 CHECK_STRING (str
, 0);
660 bzero (charsets
, (MAX_CHARSET
+ 1) * sizeof (int));
661 find_charset_in_str (XSTRING (str
)->data
, XSTRING (str
)->size
,
664 for (i
= MAX_CHARSET
; i
>= 0; i
--)
666 val
= Fcons (CHARSET_SYMBOL (i
), val
);
670 DEFUN ("make-char-internal", Fmake_char_internal
, Smake_char_internal
, 1, 3, 0,
672 (charset
, code1
, code2
)
673 Lisp_Object charset
, code1
, code2
;
675 CHECK_NUMBER (charset
, 0);
678 XSETFASTINT (code1
, 0);
680 CHECK_NUMBER (code1
, 1);
682 XSETFASTINT (code2
, 0);
684 CHECK_NUMBER (code2
, 2);
686 if (!CHARSET_DEFINED_P (XINT (charset
)))
687 error ("Invalid charset: %d", XINT (charset
));
689 return make_number (MAKE_CHAR (XINT (charset
), XINT (code1
), XINT (code2
)));
692 DEFUN ("split-char", Fsplit_char
, Ssplit_char
, 1, 1, 0,
693 "Return list of charset and one or two position-codes of CHAR.")
700 CHECK_NUMBER (ch
, 0);
701 SPLIT_CHAR (XFASTINT (ch
), charset
, c1
, c2
);
703 ? Fcons (CHARSET_SYMBOL (charset
),
704 Fcons (make_number (c1
), Fcons (make_number (c2
), Qnil
)))
705 : Fcons (CHARSET_SYMBOL (charset
), Fcons (make_number (c1
), Qnil
)));
708 DEFUN ("char-charset", Fchar_charset
, Schar_charset
, 1, 1, 0,
709 "Return charset of CHAR.")
713 CHECK_NUMBER (ch
, 0);
715 return CHARSET_SYMBOL (CHAR_CHARSET (XINT (ch
)));
718 DEFUN ("iso-charset", Fiso_charset
, Siso_charset
, 3, 3, 0,
719 "Return charset of ISO's specification DIMENSION, CHARS, and FINAL-CHAR.")
720 (dimension
, chars
, final_char
)
721 Lisp_Object dimension
, chars
, final_char
;
725 CHECK_NUMBER (dimension
, 0);
726 CHECK_NUMBER (chars
, 1);
727 CHECK_NUMBER (final_char
, 2);
729 if ((charset
= ISO_CHARSET_TABLE (dimension
, chars
, final_char
)) < 0)
731 return CHARSET_SYMBOL (charset
);
734 /* If GENERICP is nonzero, return nonzero iff C is a valid normal or
735 generic character. If GENERICP is zero, return nonzero iff C is a
736 valid normal character. Do not call this function directly,
737 instead use macro CHAR_VALID_P. */
739 char_valid_p (c
, genericp
)
746 if (SINGLE_BYTE_CHAR_P (c
))
748 SPLIT_NON_ASCII_CHAR (c
, charset
, c1
, c2
);
749 if (!CHARSET_VALID_P (charset
))
751 return (c
< MIN_CHAR_COMPOSITION
752 ? ((c
& CHAR_FIELD1_MASK
) /* i.e. dimension of C is two. */
753 ? (genericp
&& c1
== 0 && c2
== 0
754 || c1
>= 32 && c2
>= 32)
755 : (genericp
&& c1
== 0
757 : c
< MIN_CHAR_COMPOSITION
+ n_cmpchars
);
760 DEFUN ("char-valid-p", Fchar_valid_p
, Schar_valid_p
, 1, 2, 0,
761 "Return t if OBJECT is a valid normal character.
762 If optional arg GENERICP is non-nil, also return t if OBJECT is
763 a valid generic character.")
765 Lisp_Object object
, genericp
;
767 if (! NATNUMP (object
))
769 return (CHAR_VALID_P (XFASTINT (object
), !NILP (genericp
)) ? Qt
: Qnil
);
772 DEFUN ("char-bytes", Fchar_bytes
, Schar_bytes
, 1, 1, 0,
773 "Return byte length of multi-byte form of CHAR.")
780 CHECK_NUMBER (ch
, 0);
781 if (COMPOSITE_CHAR_P (XFASTINT (ch
)))
783 unsigned int id
= COMPOSITE_CHAR_ID (XFASTINT (ch
));
785 bytes
= (id
< n_cmpchars
? cmpchar_table
[id
]->len
: 1);
789 int charset
= CHAR_CHARSET (XFASTINT (ch
));
791 bytes
= CHARSET_DEFINED_P (charset
) ? CHARSET_BYTES (charset
) : 1;
794 XSETFASTINT (val
, bytes
);
798 /* Return the width of character of which multi-byte form starts with
799 C. The width is measured by how many columns occupied on the
800 screen when displayed in the current buffer. */
802 #define ONE_BYTE_CHAR_WIDTH(c) \
805 ? XFASTINT (current_buffer->tab_width) \
806 : (c == '\n' ? 0 : (NILP (current_buffer->ctl_arrow) ? 4 : 2))) \
810 ? (NILP (current_buffer->ctl_arrow) ? 4 : 2) \
811 : ((! NILP (current_buffer->enable_multibyte_characters) \
812 && BASE_LEADING_CODE_P (c)) \
813 ? WIDTH_BY_CHAR_HEAD (c) \
817 DEFUN ("char-width", Fchar_width, Schar_width, 1, 1, 0,
818 "Return width of CHAR when displayed in the current buffer.\n\
819 The width is measured by how many columns it occupies on the screen.")
823 Lisp_Object val
, disp
;
825 struct Lisp_Char_Table
*dp
= buffer_display_table ();
827 CHECK_NUMBER (ch
, 0);
831 /* Get the way the display table would display it. */
832 disp
= dp
? DISP_CHAR_VECTOR (dp
, c
) : Qnil
;
835 XSETINT (val
, XVECTOR (disp
)->size
);
836 else if (SINGLE_BYTE_CHAR_P (c
))
837 XSETINT (val
, ONE_BYTE_CHAR_WIDTH (c
));
838 else if (COMPOSITE_CHAR_P (c
))
840 int id
= COMPOSITE_CHAR_ID (XFASTINT (ch
));
841 XSETFASTINT (val
, (id
< n_cmpchars
? cmpchar_table
[id
]->width
: 0));
845 int charset
= CHAR_CHARSET (c
);
847 XSETFASTINT (val
, CHARSET_WIDTH (charset
));
852 /* Return width of string STR of length LEN when displayed in the
853 current buffer. The width is measured by how many columns it
854 occupies on the screen. */
861 unsigned char *endp
= str
+ len
;
863 struct Lisp_Char_Table
*dp
= buffer_display_table ();
867 if (*str
== LEADING_CODE_COMPOSITION
)
869 int id
= str_cmpchar_id (str
, endp
- str
);
878 width
+= cmpchar_table
[id
]->width
;
879 str
+= cmpchar_table
[id
]->len
;
886 int c
= STRING_CHAR (str
, endp
- str
);
888 /* Get the way the display table would display it. */
890 disp
= DISP_CHAR_VECTOR (dp
, c
);
895 thiswidth
= XVECTOR (disp
)->size
;
897 thiswidth
= ONE_BYTE_CHAR_WIDTH (*str
);
900 str
+= BYTES_BY_CHAR_HEAD (*str
);
906 DEFUN ("string-width", Fstring_width
, Sstring_width
, 1, 1, 0,
907 "Return width of STRING when displayed in the current buffer.\n\
908 Width is measured by how many columns it occupies on the screen.\n\
909 When calculating width of a multibyte character in STRING,\n\
910 only the base leading-code is considered; the validity of\n\
911 the following bytes is not checked.")
917 CHECK_STRING (str
, 0);
918 XSETFASTINT (val
, strwidth (XSTRING (str
)->data
, XSTRING (str
)->size
));
922 DEFUN ("char-direction", Fchar_direction
, Schar_direction
, 1, 1, 0,
923 "Return the direction of CHAR.\n\
924 The returned value is 0 for left-to-right and 1 for right-to-left.")
930 CHECK_NUMBER (ch
, 0);
931 charset
= CHAR_CHARSET (XFASTINT (ch
));
932 if (!CHARSET_DEFINED_P (charset
))
933 error ("Invalid character: %d", XINT (ch
));
934 return CHARSET_TABLE_INFO (charset
, CHARSET_DIRECTION_IDX
);
937 DEFUN ("chars-in-string", Fchars_in_string
, Schars_in_string
, 1, 1, 0,
938 "Return number of characters in STRING.\n\
939 When using multibyte characters, this is not the necessarily same as\n\
940 the length of STRING; the length counts a multibyte characters as\n\
941 several bytes, but this function counts a multibyte character as one\n\
947 unsigned char *p
, *endp
;
950 CHECK_STRING (str
, 0);
952 if (NILP (current_buffer
->enable_multibyte_characters
))
953 return make_number (XSTRING (str
)->size
);
955 p
= XSTRING (str
)->data
; endp
= p
+ XSTRING (str
)->size
;
959 if (*p
== LEADING_CODE_COMPOSITION
)
962 while (p
< endp
&& ! CHAR_HEAD_P (p
)) p
++;
965 p
+= BYTES_BY_CHAR_HEAD (*p
);
969 XSETFASTINT (val
, chars
);
973 DEFUN ("chars-in-region", Fchars_in_region
, Schars_in_region
, 2, 2, 0,
974 "Return number of characters between BEG and END.\n\
975 When using multibyte characters, this is not the necessarily same\n\
976 as (- END BEG); that subtraction gives you the number of bytes, which\n\
977 may be more than the number of characters.")
979 Lisp_Object beg
, end
;
984 unsigned char *p
, *endp
;
986 validate_region (&beg
, &end
);
988 from
= min (XFASTINT (beg
), XFASTINT (end
));
989 to
= max (XFASTINT (beg
), XFASTINT (end
));
992 if (NILP (current_buffer
->enable_multibyte_characters
))
993 return make_number (to
- from
);
995 if (from
< GPT
&& GPT
<= to
)
1003 endp
= POS_ADDR (stop
);
1013 p
= POS_ADDR (stop
);
1015 endp
= POS_ADDR (stop
);
1018 if (*p
== LEADING_CODE_COMPOSITION
)
1021 while (p
< endp
&& ! CHAR_HEAD_P (p
)) p
++;
1024 p
+= BYTES_BY_CHAR_HEAD (*p
);
1029 return make_number (chars
);
1032 DEFUN ("char-boundary-p", Fchar_boundary_p
, Schar_boundary_p
, 1, 1, 0,
1033 "Return non-nil value if POS is at character boundary of multibyte form.\n\
1034 When the value is non-nil, it contains some additional information:\n\
1035 0 if POS is at an ASCII character or at the end of range,\n\
1036 1 if POS is before a 2-byte length multi-byte form,\n\
1037 2 if POS is before a 3-byte length multi-byte form,\n\
1038 3 if POS is before a 4-byte length multi-byte form,\n\
1039 4 if POS is before a composite character.\n\
1040 If POS is out of range or not at character boundary, return NIL.")
1047 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1050 if (n
< BEGV
|| n
> ZV
)
1053 if (n
== ZV
|| NILP (current_buffer
->enable_multibyte_characters
))
1054 XSETFASTINT (val
, 0);
1057 unsigned char *p
= POS_ADDR (n
);
1059 if (SINGLE_BYTE_CHAR_P (*p
))
1060 XSETFASTINT (val
, 0);
1061 else if (*p
== LEADING_CODE_COMPOSITION
)
1062 XSETFASTINT (val
, 4);
1063 else if (BYTES_BY_CHAR_HEAD (*p
) > 1)
1064 XSETFASTINT (val
, BYTES_BY_CHAR_HEAD (*p
) - 1);
1071 DEFUN ("concat-chars", Fconcat_chars
, Sconcat_chars
, 1, MANY
, 0,
1072 "Concatenate all the argument characters and make the result a string.")
1079 = (unsigned char *) alloca (MAX_LENGTH_OF_MULTI_BYTE_FORM
* n
);
1080 unsigned char *p
= buf
;
1083 for (i
= 0; i
< n
; i
++)
1088 if (!INTEGERP (args
[i
]))
1091 CHECK_NUMBER (args
[i
], 0);
1094 len
= CHAR_STRING (c
, p
, str
);
1096 /* C is a composite character. */
1097 bcopy (str
, p
, len
);
1101 val
= make_string (buf
, p
- buf
);
1107 /*** Composite characters staffs ***/
1109 /* Each composite character is identified by CMPCHAR-ID which is
1110 assigned when Emacs needs the character code of the composite
1111 character (e.g. when displaying it on the screen). See the
1112 document "GENERAL NOTE on COMPOSITE CHARACTER" in `charset.h' how a
1113 composite character is represented in Emacs. */
1115 /* If `static' is defined, it means that it is defined to null string. */
1117 /* The following function is copied from lread.c. */
1119 hash_string (ptr
, len
)
1123 register unsigned char *p
= ptr
;
1124 register unsigned char *end
= p
+ len
;
1125 register unsigned char c
;
1126 register int hash
= 0;
1131 if (c
>= 0140) c
-= 40;
1132 hash
= ((hash
<<3) + (hash
>>28) + c
);
1134 return hash
& 07777777777;
1138 #define CMPCHAR_HASH_TABLE_SIZE 0xFFF
1140 static int *cmpchar_hash_table
[CMPCHAR_HASH_TABLE_SIZE
];
1142 /* Each element of `cmpchar_hash_table' is a pointer to an array of
1143 integer, where the 1st element is the size of the array, the 2nd
1144 element is how many elements are actually used in the array, and
1145 the remaining elements are CMPCHAR-IDs of composite characters of
1146 the same hash value. */
1147 #define CMPCHAR_HASH_SIZE(table) table[0]
1148 #define CMPCHAR_HASH_USED(table) table[1]
1149 #define CMPCHAR_HASH_CMPCHAR_ID(table, i) table[i]
1151 /* Return CMPCHAR-ID of the composite character in STR of the length
1152 LEN. If the composite character has not yet been registered,
1153 register it in `cmpchar_table' and assign new CMPCHAR-ID. This
1154 is the sole function for assigning CMPCHAR-ID. */
1156 str_cmpchar_id (str
, len
)
1160 int hash_idx
, *hashp
;
1162 int embedded_rule
; /* 1 if composition rule is embedded. */
1163 int chars
; /* number of components. */
1165 struct cmpchar_info
*cmpcharp
;
1168 /* Any composite char have at least 3-byte length. */
1171 /* The second byte 0xFF means compostion rule is embedded. */
1172 embedded_rule
= (str
[1] == 0xFF);
1174 /* At first, get the actual length of the composite character. */
1176 unsigned char *p
, *endp
= str
+ 1, *lastp
= str
+ len
;
1179 while (endp
< lastp
&& ! CHAR_HEAD_P (endp
)) endp
++;
1181 p
= str
+ 1 + embedded_rule
;
1184 /* No need of checking if *P is 0xA0 because
1185 BYTES_BY_CHAR_HEAD (0x80) surely returns 2. */
1186 p
+= (bytes
= BYTES_BY_CHAR_HEAD (*p
- 0x20) + embedded_rule
);
1189 len
= (p
-= embedded_rule
) - str
;
1191 len
-= - bytes
, chars
--;
1193 if (chars
< 2 || chars
> MAX_COMPONENT_COUNT
)
1194 /* Invalid number of components. */
1197 hash_idx
= hash_string (str
, len
) % CMPCHAR_HASH_TABLE_SIZE
;
1198 hashp
= cmpchar_hash_table
[hash_idx
];
1200 /* Then, look into the hash table. */
1202 /* Find the correct one among composite characters of the same
1204 for (i
= 2; i
< CMPCHAR_HASH_USED (hashp
); i
++)
1206 cmpcharp
= cmpchar_table
[CMPCHAR_HASH_CMPCHAR_ID (hashp
, i
)];
1207 if (len
== cmpcharp
->len
1208 && ! bcmp (str
, cmpcharp
->data
, len
))
1209 return CMPCHAR_HASH_CMPCHAR_ID (hashp
, i
);
1212 /* We have to register the composite character in cmpchar_table. */
1213 if (n_cmpchars
> (CHAR_FIELD2_MASK
| CHAR_FIELD3_MASK
))
1214 /* No, we have no more room for a new composite character. */
1217 /* Make the entry in hash table. */
1220 /* Make a table for 8 composite characters initially. */
1221 hashp
= (cmpchar_hash_table
[hash_idx
]
1222 = (int *) xmalloc (sizeof (int) * (2 + 8)));
1223 CMPCHAR_HASH_SIZE (hashp
) = 10;
1224 CMPCHAR_HASH_USED (hashp
) = 2;
1226 else if (CMPCHAR_HASH_USED (hashp
) >= CMPCHAR_HASH_SIZE (hashp
))
1228 CMPCHAR_HASH_SIZE (hashp
) += 8;
1229 hashp
= (cmpchar_hash_table
[hash_idx
]
1230 = (int *) xrealloc (hashp
,
1231 sizeof (int) * CMPCHAR_HASH_SIZE (hashp
)));
1233 CMPCHAR_HASH_CMPCHAR_ID (hashp
, CMPCHAR_HASH_USED (hashp
)) = n_cmpchars
;
1234 CMPCHAR_HASH_USED (hashp
)++;
1236 /* Set information of the composite character in cmpchar_table. */
1237 if (cmpchar_table_size
== 0)
1239 /* This is the first composite character to be registered. */
1240 cmpchar_table_size
= 256;
1242 = (struct cmpchar_info
**) xmalloc (sizeof (cmpchar_table
[0])
1243 * cmpchar_table_size
);
1245 else if (cmpchar_table_size
<= n_cmpchars
)
1247 cmpchar_table_size
+= 256;
1249 = (struct cmpchar_info
**) xrealloc (cmpchar_table
,
1250 sizeof (cmpchar_table
[0])
1251 * cmpchar_table_size
);
1254 cmpcharp
= (struct cmpchar_info
*) xmalloc (sizeof (struct cmpchar_info
));
1256 cmpcharp
->len
= len
;
1257 cmpcharp
->data
= (unsigned char *) xmalloc (len
+ 1);
1258 bcopy (str
, cmpcharp
->data
, len
);
1259 cmpcharp
->data
[len
] = 0;
1260 cmpcharp
->glyph_len
= chars
;
1261 cmpcharp
->glyph
= (GLYPH
*) xmalloc (sizeof (GLYPH
) * chars
);
1264 cmpcharp
->cmp_rule
= (unsigned char *) xmalloc (chars
);
1265 cmpcharp
->col_offset
= (float *) xmalloc (sizeof (float) * chars
);
1269 cmpcharp
->cmp_rule
= NULL
;
1270 cmpcharp
->col_offset
= NULL
;
1273 /* Setup GLYPH data and composition rules (if any) so as not to make
1274 them every time on displaying. */
1276 unsigned char *bufp
;
1278 float leftmost
= 0.0, rightmost
= 1.0;
1281 /* At first, col_offset[N] is set to relative to col_offset[0]. */
1282 cmpcharp
->col_offset
[0] = 0;
1284 for (i
= 0, bufp
= cmpcharp
->data
+ 1; i
< chars
; i
++)
1287 cmpcharp
->cmp_rule
[i
] = *bufp
++;
1289 if (*bufp
== 0xA0) /* This is an ASCII character. */
1291 cmpcharp
->glyph
[i
] = FAST_MAKE_GLYPH ((*++bufp
& 0x7F), 0);
1295 else /* Multibyte character. */
1297 /* Make `bufp' point normal multi-byte form temporally. */
1300 = FAST_MAKE_GLYPH (string_to_non_ascii_char (bufp
, 4, 0), 0);
1301 width
= WIDTH_BY_CHAR_HEAD (*bufp
);
1303 bufp
+= BYTES_BY_CHAR_HEAD (*bufp
- 0x20);
1306 if (embedded_rule
&& i
> 0)
1308 /* Reference points (global_ref and new_ref) are
1319 Now, we calculate the column offset of the new glyph
1320 from the left edge of the first glyph. This can avoid
1321 the same calculation everytime displaying this
1322 composite character. */
1324 /* Reference points of global glyph and new glyph. */
1325 int global_ref
= (cmpcharp
->cmp_rule
[i
] - 0xA0) / 9;
1326 int new_ref
= (cmpcharp
->cmp_rule
[i
] - 0xA0) % 9;
1327 /* Column offset relative to the first glyph. */
1328 float left
= (leftmost
1329 + (global_ref
% 3) * (rightmost
- leftmost
) / 2.0
1330 - (new_ref
% 3) * width
/ 2.0);
1332 cmpcharp
->col_offset
[i
] = left
;
1333 if (left
< leftmost
)
1335 if (left
+ width
> rightmost
)
1336 rightmost
= left
+ width
;
1340 if (width
> rightmost
)
1346 /* Now col_offset[N] are relative to the left edge of the
1347 first component. Make them relative to the left edge of
1349 for (i
= 0; i
< chars
; i
++)
1350 cmpcharp
->col_offset
[i
] -= leftmost
;
1351 /* Make rightmost holds width of overall glyph. */
1352 rightmost
-= leftmost
;
1355 cmpcharp
->width
= rightmost
;
1356 if (cmpcharp
->width
< rightmost
)
1357 /* To get a ceiling integer value. */
1361 cmpchar_table
[n_cmpchars
] = cmpcharp
;
1363 return n_cmpchars
++;
1366 /* Return the Nth element of the composite character C. */
1368 cmpchar_component (c
, n
)
1371 int id
= COMPOSITE_CHAR_ID (c
);
1373 if (id
>= n_cmpchars
/* C is not a valid composite character. */
1374 || n
>= cmpchar_table
[id
]->glyph_len
) /* No such component. */
1376 /* No face data is stored in glyph code. */
1377 return ((int) (cmpchar_table
[id
]->glyph
[n
]));
1380 DEFUN ("cmpcharp", Fcmpcharp
, Scmpcharp
, 1, 1, 0,
1381 "T if CHAR is a composite character.")
1385 CHECK_NUMBER (ch
, 0);
1386 return (COMPOSITE_CHAR_P (XINT (ch
)) ? Qt
: Qnil
);
1389 DEFUN ("composite-char-component", Fcmpchar_component
, Scmpchar_component
,
1391 "Return the IDXth component character of composite character CHARACTER.")
1393 Lisp_Object character
, idx
;
1397 CHECK_NUMBER (character
, 0);
1398 CHECK_NUMBER (idx
, 1);
1400 if ((c
= cmpchar_component (XINT (character
), XINT (idx
))) < 0)
1401 args_out_of_range (character
, idx
);
1403 return make_number (c
);
1406 DEFUN ("composite-char-composition-rule", Fcmpchar_cmp_rule
, Scmpchar_cmp_rule
,
1408 "Return the Nth composition rule embedded in composite character CHARACTER.\n\
1409 The returned rule is for composing the Nth component\n\
1410 on the (N-1)th component. If N is 0, the returned value is always 255.")
1412 Lisp_Object character
, n
;
1416 CHECK_NUMBER (character
, 0);
1417 CHECK_NUMBER (n
, 1);
1419 id
= COMPOSITE_CHAR_ID (XINT (character
));
1420 if (id
< 0 || id
>= n_cmpchars
)
1421 error ("Invalid composite character: %d", XINT (character
));
1423 if (i
> cmpchar_table
[id
]->glyph_len
)
1424 args_out_of_range (character
, n
);
1426 return make_number (cmpchar_table
[id
]->cmp_rule
[i
]);
1429 DEFUN ("composite-char-composition-rule-p", Fcmpchar_cmp_rule_p
,
1430 Scmpchar_cmp_rule_p
, 1, 1, 0,
1431 "Return non-nil if composite character CHARACTER contains a embedded rule.")
1433 Lisp_Object character
;
1437 CHECK_NUMBER (character
, 0);
1438 id
= COMPOSITE_CHAR_ID (XINT (character
));
1439 if (id
< 0 || id
>= n_cmpchars
)
1440 error ("Invalid composite character: %d", XINT (character
));
1442 return (cmpchar_table
[id
]->cmp_rule
? Qt
: Qnil
);
1445 DEFUN ("composite-char-component-count", Fcmpchar_cmp_count
,
1446 Scmpchar_cmp_count
, 1, 1, 0,
1447 "Return number of compoents of composite character CHARACTER.")
1449 Lisp_Object character
;
1453 CHECK_NUMBER (character
, 0);
1454 id
= COMPOSITE_CHAR_ID (XINT (character
));
1455 if (id
< 0 || id
>= n_cmpchars
)
1456 error ("Invalid composite character: %d", XINT (character
));
1458 return (make_number (cmpchar_table
[id
]->glyph_len
));
1461 DEFUN ("compose-string", Fcompose_string
, Scompose_string
,
1463 "Return one char string composed from all characters in STRING.")
1467 unsigned char buf
[MAX_LENGTH_OF_MULTI_BYTE_FORM
], *p
, *pend
, *ptemp
;
1470 CHECK_STRING (str
, 0);
1472 buf
[0] = LEADING_CODE_COMPOSITION
;
1473 p
= XSTRING (str
)->data
;
1474 pend
= p
+ XSTRING (str
)->size
;
1478 if (*p
< 0x20 || *p
== 127) /* control code */
1479 error ("Invalid component character: %d", *p
);
1480 else if (*p
< 0x80) /* ASCII */
1482 if (i
+ 2 >= MAX_LENGTH_OF_MULTI_BYTE_FORM
)
1483 error ("Too long string to be composed: %s", XSTRING (str
)->data
);
1484 /* Prepend an ASCII charset indicator 0xA0, set MSB of the
1487 buf
[i
++] = *p
++ + 0x80;
1489 else if (*p
== LEADING_CODE_COMPOSITION
) /* composite char */
1491 /* Already composed. Eliminate the heading
1492 LEADING_CODE_COMPOSITION, keep the remaining bytes
1496 while (! CHAR_HEAD_P (p
)) p
++;
1497 if (i
+ (p
- ptemp
) >= MAX_LENGTH_OF_MULTI_BYTE_FORM
)
1498 error ("Too long string to be composed: %s", XSTRING (str
)->data
);
1499 bcopy (ptemp
, buf
+ i
, p
- ptemp
);
1502 else /* multibyte char */
1504 /* Add 0x20 to the base leading-code, keep the remaining
1506 len
= BYTES_BY_CHAR_HEAD (*p
);
1507 if (i
+ len
>= MAX_LENGTH_OF_MULTI_BYTE_FORM
)
1508 error ("Too long string to be composed: %s", XSTRING (str
)->data
);
1509 bcopy (p
, buf
+ i
, len
);
1516 /* STR contains only one character, which can't be composed. */
1517 error ("Too short string to be composed: %s", XSTRING (str
)->data
);
1519 return make_string (buf
, i
);
1523 charset_id_internal (charset_name
)
1526 Lisp_Object val
= Fget (intern (charset_name
), Qcharset
);
1529 error ("Charset %s is not defined", charset_name
);
1531 return (XINT (XVECTOR (val
)->contents
[0]));
1534 DEFUN ("setup-special-charsets", Fsetup_special_charsets
,
1535 Ssetup_special_charsets
, 0, 0, 0, "Internal use only.")
1538 charset_latin_iso8859_1
= charset_id_internal ("latin-iso8859-1");
1539 charset_jisx0208_1978
= charset_id_internal ("japanese-jisx0208-1978");
1540 charset_jisx0208
= charset_id_internal ("japanese-jisx0208");
1541 charset_katakana_jisx0201
= charset_id_internal ("katakana-jisx0201");
1542 charset_latin_jisx0201
= charset_id_internal ("latin-jisx0201");
1543 charset_big5_1
= charset_id_internal ("chinese-big5-1");
1544 charset_big5_2
= charset_id_internal ("chinese-big5-2");
1548 init_charset_once ()
1552 staticpro (&Vcharset_table
);
1553 staticpro (&Vcharset_symbol_table
);
1555 /* This has to be done here, before we call Fmake_char_table. */
1556 Qcharset_table
= intern ("charset-table");
1557 staticpro (&Qcharset_table
);
1559 /* Intern this now in case it isn't already done.
1560 Setting this variable twice is harmless.
1561 But don't staticpro it here--that is done in alloc.c. */
1562 Qchar_table_extra_slots
= intern ("char-table-extra-slots");
1564 /* Now we are ready to set up this property, so we can
1565 create the charset table. */
1566 Fput (Qcharset_table
, Qchar_table_extra_slots
, make_number (0));
1567 Vcharset_table
= Fmake_char_table (Qcharset_table
, Qnil
);
1569 Vcharset_symbol_table
= Fmake_vector (make_number (MAX_CHARSET
+ 1), Qnil
);
1572 for (i
= 0; i
< 2; i
++)
1573 for (j
= 0; j
< 2; j
++)
1574 for (k
= 0; k
< 128; k
++)
1575 iso_charset_table
[i
][j
][k
] = -1;
1577 bzero (cmpchar_hash_table
, sizeof cmpchar_hash_table
);
1578 cmpchar_table_size
= n_cmpchars
= 0;
1580 for (i
= 0; i
< 256; i
++)
1581 BYTES_BY_CHAR_HEAD (i
) = 1;
1582 BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_11
) = 3;
1583 BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_12
) = 3;
1584 BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_21
) = 4;
1585 BYTES_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_22
) = 4;
1586 /* The following doesn't reflect the actual bytes, but just to tell
1587 that it is a start of a multibyte character. */
1588 BYTES_BY_CHAR_HEAD (LEADING_CODE_COMPOSITION
) = 2;
1590 for (i
= 0; i
< 128; i
++)
1591 WIDTH_BY_CHAR_HEAD (i
) = 1;
1592 for (; i
< 256; i
++)
1593 WIDTH_BY_CHAR_HEAD (i
) = 4;
1594 WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_11
) = 1;
1595 WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_12
) = 2;
1596 WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_21
) = 1;
1597 WIDTH_BY_CHAR_HEAD (LEADING_CODE_PRIVATE_22
) = 2;
1604 Qascii
= intern ("ascii");
1605 staticpro (&Qascii
);
1607 Qcharset
= intern ("charset");
1608 staticpro (&Qcharset
);
1610 /* Define ASCII charset now. */
1611 update_charset_table (make_number (CHARSET_ASCII
),
1612 make_number (1), make_number (94),
1617 build_string ("ASCII"),
1618 build_string ("ASCII"),
1619 build_string ("ASCII (ISO646 IRV)"));
1620 CHARSET_SYMBOL (CHARSET_ASCII
) = Qascii
;
1621 Fput (Qascii
, Qcharset
, CHARSET_TABLE_ENTRY (CHARSET_ASCII
));
1623 Qcomposition
= intern ("composition");
1624 staticpro (&Qcomposition
);
1625 CHARSET_SYMBOL (CHARSET_COMPOSITION
) = Qcomposition
;
1627 defsubr (&Sdefine_charset
);
1628 defsubr (&Sdeclare_equiv_charset
);
1629 defsubr (&Sfind_charset_region
);
1630 defsubr (&Sfind_charset_string
);
1631 defsubr (&Smake_char_internal
);
1632 defsubr (&Ssplit_char
);
1633 defsubr (&Schar_charset
);
1634 defsubr (&Siso_charset
);
1635 defsubr (&Schar_valid_p
);
1636 defsubr (&Schar_bytes
);
1637 defsubr (&Schar_width
);
1638 defsubr (&Sstring_width
);
1639 defsubr (&Schar_direction
);
1640 defsubr (&Schars_in_string
);
1641 defsubr (&Schars_in_region
);
1642 defsubr (&Schar_boundary_p
);
1643 defsubr (&Sconcat_chars
);
1644 defsubr (&Scmpcharp
);
1645 defsubr (&Scmpchar_component
);
1646 defsubr (&Scmpchar_cmp_rule
);
1647 defsubr (&Scmpchar_cmp_rule_p
);
1648 defsubr (&Scmpchar_cmp_count
);
1649 defsubr (&Scompose_string
);
1650 defsubr (&Ssetup_special_charsets
);
1652 DEFVAR_LISP ("charset-list", &Vcharset_list
,
1653 "List of charsets ever defined.");
1654 Vcharset_list
= Fcons (Qascii
, Qnil
);
1656 DEFVAR_INT ("leading-code-composition", &leading_code_composition
,
1657 "Leading-code of composite characters.");
1658 leading_code_composition
= LEADING_CODE_COMPOSITION
;
1660 DEFVAR_INT ("leading-code-private-11", &leading_code_private_11
,
1661 "Leading-code of private TYPE9N charset of column-width 1.");
1662 leading_code_private_11
= LEADING_CODE_PRIVATE_11
;
1664 DEFVAR_INT ("leading-code-private-12", &leading_code_private_12
,
1665 "Leading-code of private TYPE9N charset of column-width 2.");
1666 leading_code_private_12
= LEADING_CODE_PRIVATE_12
;
1668 DEFVAR_INT ("leading-code-private-21", &leading_code_private_21
,
1669 "Leading-code of private TYPE9Nx9N charset of column-width 1.");
1670 leading_code_private_21
= LEADING_CODE_PRIVATE_21
;
1672 DEFVAR_INT ("leading-code-private-22", &leading_code_private_22
,
1673 "Leading-code of private TYPE9Nx9N charset of column-width 2.");
1674 leading_code_private_22
= LEADING_CODE_PRIVATE_22
;