| 1 | /* Basic multilingual character support. |
| 2 | Copyright (C) 1995, 1997 Electrotechnical Laboratory, JAPAN. |
| 3 | Licensed to the Free Software Foundation. |
| 4 | |
| 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. |
| 11 | |
| 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. |
| 16 | |
| 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. */ |
| 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" |
| 35 | #include "disptab.h" |
| 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 | |
| 63 | Lisp_Object Qcharset_table; |
| 64 | |
| 65 | /* A char-table containing information of each character set. */ |
| 66 | Lisp_Object Vcharset_table; |
| 67 | |
| 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; |
| 71 | |
| 72 | /* A list of charset symbols ever defined. */ |
| 73 | Lisp_Object Vcharset_list; |
| 74 | |
| 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]; |
| 78 | |
| 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]; |
| 82 | |
| 83 | /* Table of pointers to the structure `cmpchar_info' indexed by |
| 84 | CMPCHAR-ID. */ |
| 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. */ |
| 89 | int n_cmpchars; |
| 90 | |
| 91 | /* Variables used locally in the macro FETCH_MULTIBYTE_CHAR. */ |
| 92 | unsigned char *_fetch_multibyte_char_p; |
| 93 | int _fetch_multibyte_char_len; |
| 94 | |
| 95 | #define min(X, Y) ((X) < (Y) ? (X) : (Y)) |
| 96 | #define max(X, Y) ((X) > (Y) ? (X) : (Y)) |
| 97 | \f |
| 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, |
| 103 | signal an error. |
| 104 | |
| 105 | Use macro `CHAR_STRING (C, WORKBUF, STR)' instead of calling this |
| 106 | function directly if C can be an ASCII character. */ |
| 107 | |
| 108 | int |
| 109 | non_ascii_char_to_string (c, workbuf, str) |
| 110 | int c; |
| 111 | unsigned char *workbuf, **str; |
| 112 | { |
| 113 | int charset, c1, c2; |
| 114 | |
| 115 | if (COMPOSITE_CHAR_P (c)) |
| 116 | { |
| 117 | int cmpchar_id = COMPOSITE_CHAR_ID (c); |
| 118 | |
| 119 | if (cmpchar_id < n_cmpchars) |
| 120 | { |
| 121 | *str = cmpchar_table[cmpchar_id]->data; |
| 122 | return cmpchar_table[cmpchar_id]->len; |
| 123 | } |
| 124 | else |
| 125 | { |
| 126 | error ("Invalid character: %d", c); |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | SPLIT_NON_ASCII_CHAR (c, charset, c1, c2); |
| 131 | if (!charset |
| 132 | || ! CHARSET_DEFINED_P (charset) |
| 133 | || c1 >= 0 && c1 < 32 |
| 134 | || c2 >= 0 && c2 < 32) |
| 135 | error ("Invalid character: %d", c); |
| 136 | |
| 137 | *str = workbuf; |
| 138 | *workbuf++ = CHARSET_LEADING_CODE_BASE (charset); |
| 139 | if (*workbuf = CHARSET_LEADING_CODE_EXT (charset)) |
| 140 | workbuf++; |
| 141 | *workbuf++ = c1 | 0x80; |
| 142 | if (c2 >= 0) |
| 143 | *workbuf++ = c2 | 0x80; |
| 144 | |
| 145 | return (workbuf - *str); |
| 146 | } |
| 147 | |
| 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. |
| 151 | |
| 152 | Use macro `STRING_CHAR (STR, LEN)' instead of calling this function |
| 153 | directly if STR can hold an ASCII character. */ |
| 154 | |
| 155 | string_to_non_ascii_char (str, len, actual_len) |
| 156 | unsigned char *str; |
| 157 | int len, *actual_len; |
| 158 | { |
| 159 | int charset; |
| 160 | unsigned char c1, c2; |
| 161 | register int c; |
| 162 | |
| 163 | if (SPLIT_STRING (str, len, charset, c1, c2) == CHARSET_ASCII) |
| 164 | { |
| 165 | if (actual_len) |
| 166 | *actual_len = 1; |
| 167 | return (int) *str; |
| 168 | } |
| 169 | |
| 170 | c = MAKE_NON_ASCII_CHAR (charset, c1, c2); |
| 171 | |
| 172 | if (actual_len) |
| 173 | *actual_len = (charset == CHARSET_COMPOSITION |
| 174 | ? cmpchar_table[COMPOSITE_CHAR_ID (c)]->len |
| 175 | : BYTES_BY_CHAR_HEAD (*str)); |
| 176 | return c; |
| 177 | } |
| 178 | |
| 179 | /* Return the length of the multi-byte form at string STR of length LEN. */ |
| 180 | int |
| 181 | multibyte_form_length (str, len) |
| 182 | unsigned char *str; |
| 183 | int len; |
| 184 | { |
| 185 | int charset; |
| 186 | unsigned char c1, c2; |
| 187 | register int c; |
| 188 | |
| 189 | if (SPLIT_STRING (str, len, charset, c1, c2) == CHARSET_ASCII) |
| 190 | return 1; |
| 191 | |
| 192 | return (charset == CHARSET_COMPOSITION |
| 193 | ? cmpchar_table[(c1 << 7) | c2]->len |
| 194 | : BYTES_BY_CHAR_HEAD (*str)); |
| 195 | } |
| 196 | |
| 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. */ |
| 202 | |
| 203 | split_non_ascii_string (str, len, charset, c1, c2) |
| 204 | register unsigned char *str, *c1, *c2; |
| 205 | register int len, *charset; |
| 206 | { |
| 207 | register unsigned int cs = *str++; |
| 208 | |
| 209 | if (cs == LEADING_CODE_COMPOSITION) |
| 210 | { |
| 211 | int cmpchar_id = str_cmpchar_id (str - 1, len); |
| 212 | |
| 213 | if (cmpchar_id < 0) |
| 214 | return -1; |
| 215 | *charset = cs, *c1 = cmpchar_id >> 7, *c2 = cmpchar_id & 0x7F; |
| 216 | } |
| 217 | else if ((cs < LEADING_CODE_PRIVATE_11 || (cs = *str++) >= 0xA0) |
| 218 | && CHARSET_DEFINED_P (cs)) |
| 219 | { |
| 220 | *charset = cs; |
| 221 | if (*str < 0xA0) |
| 222 | return -1; |
| 223 | *c1 = (*str++) & 0x7F; |
| 224 | if (CHARSET_DIMENSION (cs) == 2) |
| 225 | { |
| 226 | if (*str < 0xA0) |
| 227 | return -1; |
| 228 | *c2 = (*str++) & 0x7F; |
| 229 | } |
| 230 | } |
| 231 | else |
| 232 | return -1; |
| 233 | return 0; |
| 234 | } |
| 235 | |
| 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) |
| 240 | Lisp_Object table; |
| 241 | int c, charset, c1, c2; |
| 242 | { |
| 243 | Lisp_Object ch; |
| 244 | int alt_charset, alt_c1, alt_c2, dimension; |
| 245 | |
| 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)) |
| 249 | || XINT (ch) < 0) |
| 250 | return c; |
| 251 | |
| 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); |
| 257 | |
| 258 | /* Since CH is a generic character, we must return a specific |
| 259 | charater which has the same position codes as C from CH. */ |
| 260 | if (charset < 0) |
| 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. */ |
| 264 | return c; |
| 265 | if (!alt_c1) alt_c1 = c1; |
| 266 | if (!alt_c2) alt_c2 = c2; |
| 267 | return MAKE_CHAR (alt_charset, c1, c2); |
| 268 | } |
| 269 | |
| 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 |
| 274 | advance. */ |
| 275 | |
| 276 | void |
| 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; |
| 283 | { |
| 284 | int charset = XINT (charset_id); |
| 285 | int bytes; |
| 286 | unsigned char leading_code_base, leading_code_ext; |
| 287 | |
| 288 | if (NILP (CHARSET_TABLE_ENTRY (charset))) |
| 289 | CHARSET_TABLE_ENTRY (charset) |
| 290 | = Fmake_vector (make_number (CHARSET_MAX_IDX), Qnil); |
| 291 | |
| 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) |
| 297 | { |
| 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; |
| 303 | } |
| 304 | else |
| 305 | { |
| 306 | /* Private charset. */ |
| 307 | bytes += 2; /* For base and extended leading-codes. */ |
| 308 | leading_code_base |
| 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; |
| 317 | } |
| 318 | |
| 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) |
| 331 | = iso_graphic_plane; |
| 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; |
| 336 | |
| 337 | { |
| 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 |
| 342 | is set to nil. */ |
| 343 | int i; |
| 344 | |
| 345 | for (i = 0; i <= MAX_CHARSET; i++) |
| 346 | if (!NILP (CHARSET_TABLE_ENTRY (i))) |
| 347 | { |
| 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)) |
| 352 | { |
| 353 | CHARSET_TABLE_INFO (charset, CHARSET_REVERSE_CHARSET_IDX) |
| 354 | = make_number (i); |
| 355 | CHARSET_TABLE_INFO (i, CHARSET_REVERSE_CHARSET_IDX) = charset_id; |
| 356 | break; |
| 357 | } |
| 358 | } |
| 359 | if (i > MAX_CHARSET) |
| 360 | /* No such a charset. */ |
| 361 | CHARSET_TABLE_INFO (charset, CHARSET_REVERSE_CHARSET_IDX) |
| 362 | = make_number (-1); |
| 363 | } |
| 364 | |
| 365 | if (charset != CHARSET_ASCII |
| 366 | && charset < MIN_CHARSET_PRIVATE_DIMENSION1) |
| 367 | { |
| 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); |
| 371 | |
| 372 | /* Update table emacs_code_class. */ |
| 373 | emacs_code_class[charset] = (bytes == 2 |
| 374 | ? EMACS_leading_code_2 |
| 375 | : (bytes == 3 |
| 376 | ? EMACS_leading_code_3 |
| 377 | : EMACS_leading_code_4)); |
| 378 | } |
| 379 | |
| 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; |
| 383 | } |
| 384 | |
| 385 | #ifdef emacs |
| 386 | |
| 387 | /* Return charset id of CHARSET_SYMBOL, or return -1 if CHARSET_SYMBOL |
| 388 | is invalid. */ |
| 389 | int |
| 390 | get_charset_id (charset_symbol) |
| 391 | Lisp_Object charset_symbol; |
| 392 | { |
| 393 | Lisp_Object val; |
| 394 | int charset; |
| 395 | |
| 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))) |
| 400 | ? charset : -1); |
| 401 | } |
| 402 | |
| 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, |
| 405 | return 0. */ |
| 406 | Lisp_Object |
| 407 | get_new_private_charset_id (dimension, width) |
| 408 | int dimension, width; |
| 409 | { |
| 410 | int charset, from, to; |
| 411 | |
| 412 | if (dimension == 1) |
| 413 | { |
| 414 | if (width == 1) |
| 415 | from = LEADING_CODE_EXT_11, to = LEADING_CODE_EXT_12; |
| 416 | else |
| 417 | from = LEADING_CODE_EXT_12, to = LEADING_CODE_EXT_21; |
| 418 | } |
| 419 | else |
| 420 | { |
| 421 | if (width == 1) |
| 422 | from = LEADING_CODE_EXT_21, to = LEADING_CODE_EXT_22; |
| 423 | else |
| 424 | from = LEADING_CODE_EXT_22, to = LEADING_CODE_EXT_MAX - 1; |
| 425 | } |
| 426 | |
| 427 | for (charset = from; charset < to; charset++) |
| 428 | if (!CHARSET_DEFINED_P (charset)) break; |
| 429 | |
| 430 | return make_number (charset < to ? charset : 0); |
| 431 | } |
| 432 | |
| 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\ |
| 445 | \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\ |
| 449 | \n\ |
| 450 | ISO-FINAL-CHAR (character) is the final character of the\n\ |
| 451 | corresponding ISO 2022 charset.\n\ |
| 452 | \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\ |
| 456 | \n\ |
| 457 | SHORT-NAME (string) is the short name to refer to the charset.\n\ |
| 458 | \n\ |
| 459 | LONG-NAME (string) is the long name to refer to the charset.\n\ |
| 460 | \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; |
| 464 | { |
| 465 | Lisp_Object *vec; |
| 466 | |
| 467 | if (!NILP (charset_id)) |
| 468 | CHECK_NUMBER (charset_id, 0); |
| 469 | CHECK_SYMBOL (charset_symbol, 1); |
| 470 | CHECK_VECTOR (info_vector, 2); |
| 471 | |
| 472 | if (! NILP (charset_id)) |
| 473 | { |
| 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)); |
| 478 | } |
| 479 | |
| 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) |
| 488 | || !STRINGP (vec[6]) |
| 489 | || !STRINGP (vec[7]) |
| 490 | || !STRINGP (vec[8])) |
| 491 | error ("Invalid info-vector argument for defining charset %s", |
| 492 | XSYMBOL (charset_symbol)->name->data); |
| 493 | |
| 494 | if (NILP (charset_id)) |
| 495 | { |
| 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); |
| 500 | } |
| 501 | |
| 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); |
| 507 | return Qnil; |
| 508 | } |
| 509 | |
| 510 | DEFUN ("declare-equiv-charset", Fdeclare_equiv_charset, Sdeclare_equiv_charset, |
| 511 | 4, 4, 0, |
| 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; |
| 516 | { |
| 517 | int charset; |
| 518 | |
| 519 | CHECK_NUMBER (dimension, 0); |
| 520 | CHECK_NUMBER (chars, 1); |
| 521 | CHECK_NUMBER (final_char, 2); |
| 522 | CHECK_SYMBOL (charset_symbol, 3); |
| 523 | |
| 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); |
| 532 | |
| 533 | ISO_CHARSET_TABLE (dimension, chars, final_char) = charset; |
| 534 | return Qnil; |
| 535 | } |
| 536 | |
| 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. */ |
| 541 | |
| 542 | int |
| 543 | find_charset_in_str (str, len, charsets, table) |
| 544 | unsigned char *str; |
| 545 | int len, *charsets; |
| 546 | Lisp_Object table; |
| 547 | { |
| 548 | register int num = 0, c; |
| 549 | |
| 550 | if (! CHAR_TABLE_P (table)) |
| 551 | table = Qnil; |
| 552 | |
| 553 | while (len > 0) |
| 554 | { |
| 555 | int bytes, charset; |
| 556 | c = *str; |
| 557 | |
| 558 | if (c == LEADING_CODE_COMPOSITION) |
| 559 | { |
| 560 | int cmpchar_id = str_cmpchar_id (str, len); |
| 561 | GLYPH *glyph; |
| 562 | |
| 563 | if (cmpchar_id > 0) |
| 564 | { |
| 565 | struct cmpchar_info *cmpcharp = cmpchar_table[cmpchar_id]; |
| 566 | int i; |
| 567 | |
| 568 | for (i = 0; i < cmpcharp->glyph_len; i++) |
| 569 | { |
| 570 | c = cmpcharp->glyph[i]; |
| 571 | if (!NILP (table)) |
| 572 | { |
| 573 | if ((c = unify_char (table, c, 0, 0, 0)) < 0) |
| 574 | c = cmpcharp->glyph[i]; |
| 575 | } |
| 576 | if ((charset = CHAR_CHARSET (c)) < 0) |
| 577 | charset = CHARSET_ASCII; |
| 578 | if (!charsets[charset]) |
| 579 | { |
| 580 | charsets[charset] = 1; |
| 581 | num += 1; |
| 582 | } |
| 583 | } |
| 584 | str += cmpcharp->len; |
| 585 | len -= cmpcharp->len; |
| 586 | continue; |
| 587 | } |
| 588 | |
| 589 | charset = CHARSET_ASCII; |
| 590 | bytes = 1; |
| 591 | } |
| 592 | else |
| 593 | { |
| 594 | c = STRING_CHAR_AND_LENGTH (str, len, bytes); |
| 595 | if (! NILP (table)) |
| 596 | { |
| 597 | int c1 = unify_char (table, c, 0, 0, 0); |
| 598 | if (c1 >= 0) |
| 599 | c = c1; |
| 600 | } |
| 601 | charset = CHAR_CHARSET (c); |
| 602 | } |
| 603 | |
| 604 | if (!charsets[charset]) |
| 605 | { |
| 606 | charsets[charset] = 1; |
| 607 | num += 1; |
| 608 | } |
| 609 | str += bytes; |
| 610 | len -= bytes; |
| 611 | } |
| 612 | return num; |
| 613 | } |
| 614 | |
| 615 | DEFUN ("find-charset-region", Ffind_charset_region, Sfind_charset_region, |
| 616 | 2, 3, 0, |
| 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.") |
| 620 | (beg, end, table) |
| 621 | Lisp_Object beg, end, table; |
| 622 | { |
| 623 | int charsets[MAX_CHARSET + 1]; |
| 624 | int from, to, stop, i; |
| 625 | Lisp_Object val; |
| 626 | |
| 627 | validate_region (&beg, &end); |
| 628 | from = XFASTINT (beg); |
| 629 | stop = to = XFASTINT (end); |
| 630 | if (from < GPT && GPT < to) |
| 631 | stop = GPT; |
| 632 | bzero (charsets, (MAX_CHARSET + 1) * sizeof (int)); |
| 633 | while (1) |
| 634 | { |
| 635 | find_charset_in_str (POS_ADDR (from), stop - from, charsets, table); |
| 636 | if (stop < to) |
| 637 | from = stop, stop = to; |
| 638 | else |
| 639 | break; |
| 640 | } |
| 641 | val = Qnil; |
| 642 | for (i = MAX_CHARSET; i >= 0; i--) |
| 643 | if (charsets[i]) |
| 644 | val = Fcons (CHARSET_SYMBOL (i), val); |
| 645 | return val; |
| 646 | } |
| 647 | |
| 648 | DEFUN ("find-charset-string", Ffind_charset_string, Sfind_charset_string, |
| 649 | 1, 2, 0, |
| 650 | "Return a list of charsets in STR.\n\ |
| 651 | Optional arg TABLE if non-nil is a unification table to look up.") |
| 652 | (str, table) |
| 653 | Lisp_Object str, table; |
| 654 | { |
| 655 | int charsets[MAX_CHARSET + 1]; |
| 656 | int i; |
| 657 | Lisp_Object val; |
| 658 | |
| 659 | CHECK_STRING (str, 0); |
| 660 | bzero (charsets, (MAX_CHARSET + 1) * sizeof (int)); |
| 661 | find_charset_in_str (XSTRING (str)->data, XSTRING (str)->size, |
| 662 | charsets, table); |
| 663 | val = Qnil; |
| 664 | for (i = MAX_CHARSET; i >= 0; i--) |
| 665 | if (charsets[i]) |
| 666 | val = Fcons (CHARSET_SYMBOL (i), val); |
| 667 | return val; |
| 668 | } |
| 669 | \f |
| 670 | DEFUN ("make-char-internal", Fmake_char_internal, Smake_char_internal, 1, 3, 0, |
| 671 | "") |
| 672 | (charset, code1, code2) |
| 673 | Lisp_Object charset, code1, code2; |
| 674 | { |
| 675 | CHECK_NUMBER (charset, 0); |
| 676 | |
| 677 | if (NILP (code1)) |
| 678 | XSETFASTINT (code1, 0); |
| 679 | else |
| 680 | CHECK_NUMBER (code1, 1); |
| 681 | if (NILP (code2)) |
| 682 | XSETFASTINT (code2, 0); |
| 683 | else |
| 684 | CHECK_NUMBER (code2, 2); |
| 685 | |
| 686 | if (!CHARSET_DEFINED_P (XINT (charset))) |
| 687 | error ("Invalid charset: %d", XINT (charset)); |
| 688 | |
| 689 | return make_number (MAKE_CHAR (XINT (charset), XINT (code1), XINT (code2))); |
| 690 | } |
| 691 | |
| 692 | DEFUN ("split-char", Fsplit_char, Ssplit_char, 1, 1, 0, |
| 693 | "Return list of charset and one or two position-codes of CHAR.") |
| 694 | (ch) |
| 695 | Lisp_Object ch; |
| 696 | { |
| 697 | Lisp_Object val; |
| 698 | int charset, c1, c2; |
| 699 | |
| 700 | CHECK_NUMBER (ch, 0); |
| 701 | SPLIT_CHAR (XFASTINT (ch), charset, c1, c2); |
| 702 | return (c2 >= 0 |
| 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))); |
| 706 | } |
| 707 | |
| 708 | DEFUN ("char-charset", Fchar_charset, Schar_charset, 1, 1, 0, |
| 709 | "Return charset of CHAR.") |
| 710 | (ch) |
| 711 | Lisp_Object ch; |
| 712 | { |
| 713 | CHECK_NUMBER (ch, 0); |
| 714 | |
| 715 | return CHARSET_SYMBOL (CHAR_CHARSET (XINT (ch))); |
| 716 | } |
| 717 | |
| 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; |
| 722 | { |
| 723 | int charset; |
| 724 | |
| 725 | CHECK_NUMBER (dimension, 0); |
| 726 | CHECK_NUMBER (chars, 1); |
| 727 | CHECK_NUMBER (final_char, 2); |
| 728 | |
| 729 | if ((charset = ISO_CHARSET_TABLE (dimension, chars, final_char)) < 0) |
| 730 | return Qnil; |
| 731 | return CHARSET_SYMBOL (charset); |
| 732 | } |
| 733 | |
| 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. */ |
| 738 | int |
| 739 | char_valid_p (c, genericp) |
| 740 | int c, genericp; |
| 741 | { |
| 742 | int charset, c1, c2; |
| 743 | |
| 744 | if (c < 0) |
| 745 | return 0; |
| 746 | if (SINGLE_BYTE_CHAR_P (c)) |
| 747 | return 1; |
| 748 | SPLIT_NON_ASCII_CHAR (c, charset, c1, c2); |
| 749 | if (!CHARSET_VALID_P (charset)) |
| 750 | return 0; |
| 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 |
| 756 | || c1 >= 32)) |
| 757 | : c < MIN_CHAR_COMPOSITION + n_cmpchars); |
| 758 | } |
| 759 | |
| 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.") |
| 764 | (object, genericp) |
| 765 | Lisp_Object object, genericp; |
| 766 | { |
| 767 | if (! NATNUMP (object)) |
| 768 | return Qnil; |
| 769 | return (CHAR_VALID_P (XFASTINT (object), !NILP (genericp)) ? Qt : Qnil); |
| 770 | } |
| 771 | |
| 772 | DEFUN ("char-bytes", Fchar_bytes, Schar_bytes, 1, 1, 0, |
| 773 | "Return byte length of multi-byte form of CHAR.") |
| 774 | (ch) |
| 775 | Lisp_Object ch; |
| 776 | { |
| 777 | Lisp_Object val; |
| 778 | int bytes; |
| 779 | |
| 780 | CHECK_NUMBER (ch, 0); |
| 781 | if (COMPOSITE_CHAR_P (XFASTINT (ch))) |
| 782 | { |
| 783 | unsigned int id = COMPOSITE_CHAR_ID (XFASTINT (ch)); |
| 784 | |
| 785 | bytes = (id < n_cmpchars ? cmpchar_table[id]->len : 1); |
| 786 | } |
| 787 | else |
| 788 | { |
| 789 | int charset = CHAR_CHARSET (XFASTINT (ch)); |
| 790 | |
| 791 | bytes = CHARSET_DEFINED_P (charset) ? CHARSET_BYTES (charset) : 1; |
| 792 | } |
| 793 | |
| 794 | XSETFASTINT (val, bytes); |
| 795 | return val; |
| 796 | } |
| 797 | |
| 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. */ |
| 801 | |
| 802 | #define ONE_BYTE_CHAR_WIDTH(c) \ |
| 803 | (c < 0x20 \ |
| 804 | ? (c == '\t' \ |
| 805 | ? XFASTINT (current_buffer->tab_width) \ |
| 806 | : (c == '\n' ? 0 : (NILP (current_buffer->ctl_arrow) ? 4 : 2))) \ |
| 807 | : (c < 0x7f \ |
| 808 | ? 1 \ |
| 809 | : (c == 0x7F \ |
| 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) \ |
| 814 | : 4)))) \ |
| 815 | |
| 816 | |
| 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.") |
| 820 | (ch) |
| 821 | Lisp_Object ch; |
| 822 | { |
| 823 | Lisp_Object val, disp; |
| 824 | int c; |
| 825 | struct Lisp_Char_Table *dp = buffer_display_table (); |
| 826 | |
| 827 | CHECK_NUMBER (ch, 0); |
| 828 | |
| 829 | c = XINT (ch); |
| 830 | |
| 831 | /* Get the way the display table would display it. */ |
| 832 | disp = dp ? DISP_CHAR_VECTOR (dp, c) : Qnil; |
| 833 | |
| 834 | if (VECTORP (disp)) |
| 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)) |
| 839 | { |
| 840 | int id = COMPOSITE_CHAR_ID (XFASTINT (ch)); |
| 841 | XSETFASTINT (val, (id < n_cmpchars ? cmpchar_table[id]->width : 0)); |
| 842 | } |
| 843 | else |
| 844 | { |
| 845 | int charset = CHAR_CHARSET (c); |
| 846 | |
| 847 | XSETFASTINT (val, CHARSET_WIDTH (charset)); |
| 848 | } |
| 849 | return val; |
| 850 | } |
| 851 | |
| 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. */ |
| 855 | |
| 856 | int |
| 857 | strwidth (str, len) |
| 858 | unsigned char *str; |
| 859 | int len; |
| 860 | { |
| 861 | unsigned char *endp = str + len; |
| 862 | int width = 0; |
| 863 | struct Lisp_Char_Table *dp = buffer_display_table (); |
| 864 | |
| 865 | while (str < endp) |
| 866 | { |
| 867 | if (*str == LEADING_CODE_COMPOSITION) |
| 868 | { |
| 869 | int id = str_cmpchar_id (str, endp - str); |
| 870 | |
| 871 | if (id < 0) |
| 872 | { |
| 873 | width += 4; |
| 874 | str++; |
| 875 | } |
| 876 | else |
| 877 | { |
| 878 | width += cmpchar_table[id]->width; |
| 879 | str += cmpchar_table[id]->len; |
| 880 | } |
| 881 | } |
| 882 | else |
| 883 | { |
| 884 | Lisp_Object disp; |
| 885 | int thiswidth; |
| 886 | int c = STRING_CHAR (str, endp - str); |
| 887 | |
| 888 | /* Get the way the display table would display it. */ |
| 889 | if (dp) |
| 890 | disp = DISP_CHAR_VECTOR (dp, c); |
| 891 | else |
| 892 | disp = Qnil; |
| 893 | |
| 894 | if (VECTORP (disp)) |
| 895 | thiswidth = XVECTOR (disp)->size; |
| 896 | else |
| 897 | thiswidth = ONE_BYTE_CHAR_WIDTH (*str); |
| 898 | |
| 899 | width += thiswidth; |
| 900 | str += BYTES_BY_CHAR_HEAD (*str); |
| 901 | } |
| 902 | } |
| 903 | return width; |
| 904 | } |
| 905 | |
| 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.") |
| 912 | (str) |
| 913 | Lisp_Object str; |
| 914 | { |
| 915 | Lisp_Object val; |
| 916 | |
| 917 | CHECK_STRING (str, 0); |
| 918 | XSETFASTINT (val, strwidth (XSTRING (str)->data, XSTRING (str)->size)); |
| 919 | return val; |
| 920 | } |
| 921 | |
| 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.") |
| 925 | (ch) |
| 926 | Lisp_Object ch; |
| 927 | { |
| 928 | int charset; |
| 929 | |
| 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); |
| 935 | } |
| 936 | |
| 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\ |
| 942 | character.") |
| 943 | (str) |
| 944 | Lisp_Object str; |
| 945 | { |
| 946 | Lisp_Object val; |
| 947 | unsigned char *p, *endp; |
| 948 | int chars; |
| 949 | |
| 950 | CHECK_STRING (str, 0); |
| 951 | |
| 952 | if (NILP (current_buffer->enable_multibyte_characters)) |
| 953 | return make_number (XSTRING (str)->size); |
| 954 | |
| 955 | p = XSTRING (str)->data; endp = p + XSTRING (str)->size; |
| 956 | chars = 0; |
| 957 | while (p < endp) |
| 958 | { |
| 959 | if (*p == LEADING_CODE_COMPOSITION) |
| 960 | { |
| 961 | p++; |
| 962 | while (p < endp && ! CHAR_HEAD_P (p)) p++; |
| 963 | } |
| 964 | else |
| 965 | p += BYTES_BY_CHAR_HEAD (*p); |
| 966 | chars++; |
| 967 | } |
| 968 | |
| 969 | XSETFASTINT (val, chars); |
| 970 | return val; |
| 971 | } |
| 972 | |
| 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.") |
| 978 | (beg, end) |
| 979 | Lisp_Object beg, end; |
| 980 | { |
| 981 | int from, to, stop; |
| 982 | Lisp_Object val; |
| 983 | int chars = 0; |
| 984 | unsigned char *p, *endp; |
| 985 | |
| 986 | validate_region (&beg, &end); |
| 987 | |
| 988 | from = min (XFASTINT (beg), XFASTINT (end)); |
| 989 | to = max (XFASTINT (beg), XFASTINT (end)); |
| 990 | p = POS_ADDR (from); |
| 991 | |
| 992 | if (NILP (current_buffer->enable_multibyte_characters)) |
| 993 | return make_number (to - from); |
| 994 | |
| 995 | if (from < GPT && GPT <= to) |
| 996 | { |
| 997 | stop = GPT; |
| 998 | endp = GPT_ADDR; |
| 999 | } |
| 1000 | else |
| 1001 | { |
| 1002 | stop = to; |
| 1003 | endp = POS_ADDR (stop); |
| 1004 | } |
| 1005 | |
| 1006 | while (1) |
| 1007 | { |
| 1008 | if (p >= endp) |
| 1009 | { |
| 1010 | if (stop >= to) |
| 1011 | break; |
| 1012 | |
| 1013 | p = POS_ADDR (stop); |
| 1014 | stop = to; |
| 1015 | endp = POS_ADDR (stop); |
| 1016 | } |
| 1017 | |
| 1018 | if (*p == LEADING_CODE_COMPOSITION) |
| 1019 | { |
| 1020 | p++; |
| 1021 | while (p < endp && ! CHAR_HEAD_P (p)) p++; |
| 1022 | } |
| 1023 | else |
| 1024 | p += BYTES_BY_CHAR_HEAD (*p); |
| 1025 | |
| 1026 | chars++; |
| 1027 | } |
| 1028 | |
| 1029 | return make_number (chars); |
| 1030 | } |
| 1031 | |
| 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.") |
| 1041 | (pos) |
| 1042 | Lisp_Object pos; |
| 1043 | { |
| 1044 | Lisp_Object val; |
| 1045 | int n; |
| 1046 | |
| 1047 | CHECK_NUMBER_COERCE_MARKER (pos, 0); |
| 1048 | |
| 1049 | n = XINT (pos); |
| 1050 | if (n < BEGV || n > ZV) |
| 1051 | return Qnil; |
| 1052 | |
| 1053 | if (n == ZV || NILP (current_buffer->enable_multibyte_characters)) |
| 1054 | XSETFASTINT (val, 0); |
| 1055 | else |
| 1056 | { |
| 1057 | unsigned char *p = POS_ADDR (n); |
| 1058 | |
| 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); |
| 1065 | else |
| 1066 | val = Qnil; |
| 1067 | } |
| 1068 | return val; |
| 1069 | } |
| 1070 | |
| 1071 | DEFUN ("concat-chars", Fconcat_chars, Sconcat_chars, 1, MANY, 0, |
| 1072 | "Concatenate all the argument characters and make the result a string.") |
| 1073 | (n, args) |
| 1074 | int n; |
| 1075 | Lisp_Object *args; |
| 1076 | { |
| 1077 | int i; |
| 1078 | unsigned char *buf |
| 1079 | = (unsigned char *) alloca (MAX_LENGTH_OF_MULTI_BYTE_FORM * n); |
| 1080 | unsigned char *p = buf; |
| 1081 | Lisp_Object val; |
| 1082 | |
| 1083 | for (i = 0; i < n; i++) |
| 1084 | { |
| 1085 | int c, len; |
| 1086 | unsigned char *str; |
| 1087 | |
| 1088 | if (!INTEGERP (args[i])) |
| 1089 | { |
| 1090 | free (buf); |
| 1091 | CHECK_NUMBER (args[i], 0); |
| 1092 | } |
| 1093 | c = XINT (args[i]); |
| 1094 | len = CHAR_STRING (c, p, str); |
| 1095 | if (p != str) |
| 1096 | /* C is a composite character. */ |
| 1097 | bcopy (str, p, len); |
| 1098 | p += len; |
| 1099 | } |
| 1100 | |
| 1101 | val = make_string (buf, p - buf); |
| 1102 | return val; |
| 1103 | } |
| 1104 | |
| 1105 | #endif /* emacs */ |
| 1106 | \f |
| 1107 | /*** Composite characters staffs ***/ |
| 1108 | |
| 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. */ |
| 1114 | |
| 1115 | /* If `static' is defined, it means that it is defined to null string. */ |
| 1116 | #ifndef static |
| 1117 | /* The following function is copied from lread.c. */ |
| 1118 | static int |
| 1119 | hash_string (ptr, len) |
| 1120 | unsigned char *ptr; |
| 1121 | int len; |
| 1122 | { |
| 1123 | register unsigned char *p = ptr; |
| 1124 | register unsigned char *end = p + len; |
| 1125 | register unsigned char c; |
| 1126 | register int hash = 0; |
| 1127 | |
| 1128 | while (p != end) |
| 1129 | { |
| 1130 | c = *p++; |
| 1131 | if (c >= 0140) c -= 40; |
| 1132 | hash = ((hash<<3) + (hash>>28) + c); |
| 1133 | } |
| 1134 | return hash & 07777777777; |
| 1135 | } |
| 1136 | #endif |
| 1137 | |
| 1138 | #define CMPCHAR_HASH_TABLE_SIZE 0xFFF |
| 1139 | |
| 1140 | static int *cmpchar_hash_table[CMPCHAR_HASH_TABLE_SIZE]; |
| 1141 | |
| 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] |
| 1150 | |
| 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. */ |
| 1155 | int |
| 1156 | str_cmpchar_id (str, len) |
| 1157 | unsigned char *str; |
| 1158 | int len; |
| 1159 | { |
| 1160 | int hash_idx, *hashp; |
| 1161 | unsigned char *buf; |
| 1162 | int embedded_rule; /* 1 if composition rule is embedded. */ |
| 1163 | int chars; /* number of components. */ |
| 1164 | int i; |
| 1165 | struct cmpchar_info *cmpcharp; |
| 1166 | |
| 1167 | if (len < 5) |
| 1168 | /* Any composite char have at least 3-byte length. */ |
| 1169 | return -1; |
| 1170 | |
| 1171 | /* The second byte 0xFF means compostion rule is embedded. */ |
| 1172 | embedded_rule = (str[1] == 0xFF); |
| 1173 | |
| 1174 | /* At first, get the actual length of the composite character. */ |
| 1175 | { |
| 1176 | unsigned char *p, *endp = str + 1, *lastp = str + len; |
| 1177 | int bytes; |
| 1178 | |
| 1179 | while (endp < lastp && ! CHAR_HEAD_P (endp)) endp++; |
| 1180 | chars = 0; |
| 1181 | p = str + 1 + embedded_rule; |
| 1182 | while (p < endp) |
| 1183 | { |
| 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); |
| 1187 | chars++; |
| 1188 | } |
| 1189 | len = (p -= embedded_rule) - str; |
| 1190 | if (p > endp) |
| 1191 | len -= - bytes, chars--; |
| 1192 | |
| 1193 | if (chars < 2 || chars > MAX_COMPONENT_COUNT) |
| 1194 | /* Invalid number of components. */ |
| 1195 | return -1; |
| 1196 | } |
| 1197 | hash_idx = hash_string (str, len) % CMPCHAR_HASH_TABLE_SIZE; |
| 1198 | hashp = cmpchar_hash_table[hash_idx]; |
| 1199 | |
| 1200 | /* Then, look into the hash table. */ |
| 1201 | if (hashp != NULL) |
| 1202 | /* Find the correct one among composite characters of the same |
| 1203 | hash value. */ |
| 1204 | for (i = 2; i < CMPCHAR_HASH_USED (hashp); i++) |
| 1205 | { |
| 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); |
| 1210 | } |
| 1211 | |
| 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. */ |
| 1215 | return -1; |
| 1216 | |
| 1217 | /* Make the entry in hash table. */ |
| 1218 | if (hashp == NULL) |
| 1219 | { |
| 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; |
| 1225 | } |
| 1226 | else if (CMPCHAR_HASH_USED (hashp) >= CMPCHAR_HASH_SIZE (hashp)) |
| 1227 | { |
| 1228 | CMPCHAR_HASH_SIZE (hashp) += 8; |
| 1229 | hashp = (cmpchar_hash_table[hash_idx] |
| 1230 | = (int *) xrealloc (hashp, |
| 1231 | sizeof (int) * CMPCHAR_HASH_SIZE (hashp))); |
| 1232 | } |
| 1233 | CMPCHAR_HASH_CMPCHAR_ID (hashp, CMPCHAR_HASH_USED (hashp)) = n_cmpchars; |
| 1234 | CMPCHAR_HASH_USED (hashp)++; |
| 1235 | |
| 1236 | /* Set information of the composite character in cmpchar_table. */ |
| 1237 | if (cmpchar_table_size == 0) |
| 1238 | { |
| 1239 | /* This is the first composite character to be registered. */ |
| 1240 | cmpchar_table_size = 256; |
| 1241 | cmpchar_table |
| 1242 | = (struct cmpchar_info **) xmalloc (sizeof (cmpchar_table[0]) |
| 1243 | * cmpchar_table_size); |
| 1244 | } |
| 1245 | else if (cmpchar_table_size <= n_cmpchars) |
| 1246 | { |
| 1247 | cmpchar_table_size += 256; |
| 1248 | cmpchar_table |
| 1249 | = (struct cmpchar_info **) xrealloc (cmpchar_table, |
| 1250 | sizeof (cmpchar_table[0]) |
| 1251 | * cmpchar_table_size); |
| 1252 | } |
| 1253 | |
| 1254 | cmpcharp = (struct cmpchar_info *) xmalloc (sizeof (struct cmpchar_info)); |
| 1255 | |
| 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); |
| 1262 | if (embedded_rule) |
| 1263 | { |
| 1264 | cmpcharp->cmp_rule = (unsigned char *) xmalloc (chars); |
| 1265 | cmpcharp->col_offset = (float *) xmalloc (sizeof (float) * chars); |
| 1266 | } |
| 1267 | else |
| 1268 | { |
| 1269 | cmpcharp->cmp_rule = NULL; |
| 1270 | cmpcharp->col_offset = NULL; |
| 1271 | } |
| 1272 | |
| 1273 | /* Setup GLYPH data and composition rules (if any) so as not to make |
| 1274 | them every time on displaying. */ |
| 1275 | { |
| 1276 | unsigned char *bufp; |
| 1277 | int width; |
| 1278 | float leftmost = 0.0, rightmost = 1.0; |
| 1279 | |
| 1280 | if (embedded_rule) |
| 1281 | /* At first, col_offset[N] is set to relative to col_offset[0]. */ |
| 1282 | cmpcharp->col_offset[0] = 0; |
| 1283 | |
| 1284 | for (i = 0, bufp = cmpcharp->data + 1; i < chars; i++) |
| 1285 | { |
| 1286 | if (embedded_rule) |
| 1287 | cmpcharp->cmp_rule[i] = *bufp++; |
| 1288 | |
| 1289 | if (*bufp == 0xA0) /* This is an ASCII character. */ |
| 1290 | { |
| 1291 | cmpcharp->glyph[i] = FAST_MAKE_GLYPH ((*++bufp & 0x7F), 0); |
| 1292 | width = 1; |
| 1293 | bufp++; |
| 1294 | } |
| 1295 | else /* Multibyte character. */ |
| 1296 | { |
| 1297 | /* Make `bufp' point normal multi-byte form temporally. */ |
| 1298 | *bufp -= 0x20; |
| 1299 | cmpcharp->glyph[i] |
| 1300 | = FAST_MAKE_GLYPH (string_to_non_ascii_char (bufp, 4, 0), 0); |
| 1301 | width = WIDTH_BY_CHAR_HEAD (*bufp); |
| 1302 | *bufp += 0x20; |
| 1303 | bufp += BYTES_BY_CHAR_HEAD (*bufp - 0x20); |
| 1304 | } |
| 1305 | |
| 1306 | if (embedded_rule && i > 0) |
| 1307 | { |
| 1308 | /* Reference points (global_ref and new_ref) are |
| 1309 | encoded as below: |
| 1310 | |
| 1311 | 0--1--2 -- ascent |
| 1312 | | | |
| 1313 | | | |
| 1314 | | 4 -+--- center |
| 1315 | -- 3 5 -- baseline |
| 1316 | | | |
| 1317 | 6--7--8 -- descent |
| 1318 | |
| 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. */ |
| 1323 | |
| 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); |
| 1331 | |
| 1332 | cmpcharp->col_offset[i] = left; |
| 1333 | if (left < leftmost) |
| 1334 | leftmost = left; |
| 1335 | if (left + width > rightmost) |
| 1336 | rightmost = left + width; |
| 1337 | } |
| 1338 | else |
| 1339 | { |
| 1340 | if (width > rightmost) |
| 1341 | rightmost = width; |
| 1342 | } |
| 1343 | } |
| 1344 | if (embedded_rule) |
| 1345 | { |
| 1346 | /* Now col_offset[N] are relative to the left edge of the |
| 1347 | first component. Make them relative to the left edge of |
| 1348 | overall glyph. */ |
| 1349 | for (i = 0; i < chars; i++) |
| 1350 | cmpcharp->col_offset[i] -= leftmost; |
| 1351 | /* Make rightmost holds width of overall glyph. */ |
| 1352 | rightmost -= leftmost; |
| 1353 | } |
| 1354 | |
| 1355 | cmpcharp->width = rightmost; |
| 1356 | if (cmpcharp->width < rightmost) |
| 1357 | /* To get a ceiling integer value. */ |
| 1358 | cmpcharp->width++; |
| 1359 | } |
| 1360 | |
| 1361 | cmpchar_table[n_cmpchars] = cmpcharp; |
| 1362 | |
| 1363 | return n_cmpchars++; |
| 1364 | } |
| 1365 | |
| 1366 | /* Return the Nth element of the composite character C. */ |
| 1367 | int |
| 1368 | cmpchar_component (c, n) |
| 1369 | unsigned int c, n; |
| 1370 | { |
| 1371 | int id = COMPOSITE_CHAR_ID (c); |
| 1372 | |
| 1373 | if (id >= n_cmpchars /* C is not a valid composite character. */ |
| 1374 | || n >= cmpchar_table[id]->glyph_len) /* No such component. */ |
| 1375 | return -1; |
| 1376 | /* No face data is stored in glyph code. */ |
| 1377 | return ((int) (cmpchar_table[id]->glyph[n])); |
| 1378 | } |
| 1379 | |
| 1380 | DEFUN ("cmpcharp", Fcmpcharp, Scmpcharp, 1, 1, 0, |
| 1381 | "T if CHAR is a composite character.") |
| 1382 | (ch) |
| 1383 | Lisp_Object ch; |
| 1384 | { |
| 1385 | CHECK_NUMBER (ch, 0); |
| 1386 | return (COMPOSITE_CHAR_P (XINT (ch)) ? Qt : Qnil); |
| 1387 | } |
| 1388 | |
| 1389 | DEFUN ("composite-char-component", Fcmpchar_component, Scmpchar_component, |
| 1390 | 2, 2, 0, |
| 1391 | "Return the IDXth component character of composite character CHARACTER.") |
| 1392 | (character, idx) |
| 1393 | Lisp_Object character, idx; |
| 1394 | { |
| 1395 | int c; |
| 1396 | |
| 1397 | CHECK_NUMBER (character, 0); |
| 1398 | CHECK_NUMBER (idx, 1); |
| 1399 | |
| 1400 | if ((c = cmpchar_component (XINT (character), XINT (idx))) < 0) |
| 1401 | args_out_of_range (character, idx); |
| 1402 | |
| 1403 | return make_number (c); |
| 1404 | } |
| 1405 | |
| 1406 | DEFUN ("composite-char-composition-rule", Fcmpchar_cmp_rule, Scmpchar_cmp_rule, |
| 1407 | 2, 2, 0, |
| 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.") |
| 1411 | (character, n) |
| 1412 | Lisp_Object character, n; |
| 1413 | { |
| 1414 | int id, i; |
| 1415 | |
| 1416 | CHECK_NUMBER (character, 0); |
| 1417 | CHECK_NUMBER (n, 1); |
| 1418 | |
| 1419 | id = COMPOSITE_CHAR_ID (XINT (character)); |
| 1420 | if (id < 0 || id >= n_cmpchars) |
| 1421 | error ("Invalid composite character: %d", XINT (character)); |
| 1422 | i = XINT (n); |
| 1423 | if (i > cmpchar_table[id]->glyph_len) |
| 1424 | args_out_of_range (character, n); |
| 1425 | |
| 1426 | return make_number (cmpchar_table[id]->cmp_rule[i]); |
| 1427 | } |
| 1428 | |
| 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.") |
| 1432 | (character) |
| 1433 | Lisp_Object character; |
| 1434 | { |
| 1435 | int id; |
| 1436 | |
| 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)); |
| 1441 | |
| 1442 | return (cmpchar_table[id]->cmp_rule ? Qt : Qnil); |
| 1443 | } |
| 1444 | |
| 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.") |
| 1448 | (character) |
| 1449 | Lisp_Object character; |
| 1450 | { |
| 1451 | int id; |
| 1452 | |
| 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)); |
| 1457 | |
| 1458 | return (make_number (cmpchar_table[id]->glyph_len)); |
| 1459 | } |
| 1460 | |
| 1461 | DEFUN ("compose-string", Fcompose_string, Scompose_string, |
| 1462 | 1, 1, 0, |
| 1463 | "Return one char string composed from all characters in STRING.") |
| 1464 | (str) |
| 1465 | Lisp_Object str; |
| 1466 | { |
| 1467 | unsigned char buf[MAX_LENGTH_OF_MULTI_BYTE_FORM], *p, *pend, *ptemp; |
| 1468 | int len, i; |
| 1469 | |
| 1470 | CHECK_STRING (str, 0); |
| 1471 | |
| 1472 | buf[0] = LEADING_CODE_COMPOSITION; |
| 1473 | p = XSTRING (str)->data; |
| 1474 | pend = p + XSTRING (str)->size; |
| 1475 | i = 1; |
| 1476 | while (p < pend) |
| 1477 | { |
| 1478 | if (*p < 0x20 || *p == 127) /* control code */ |
| 1479 | error ("Invalid component character: %d", *p); |
| 1480 | else if (*p < 0x80) /* ASCII */ |
| 1481 | { |
| 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 |
| 1485 | code itself. */ |
| 1486 | buf[i++] = 0xA0; |
| 1487 | buf[i++] = *p++ + 0x80; |
| 1488 | } |
| 1489 | else if (*p == LEADING_CODE_COMPOSITION) /* composite char */ |
| 1490 | { |
| 1491 | /* Already composed. Eliminate the heading |
| 1492 | LEADING_CODE_COMPOSITION, keep the remaining bytes |
| 1493 | unchanged. */ |
| 1494 | p++; |
| 1495 | ptemp = p; |
| 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); |
| 1500 | i += p - ptemp; |
| 1501 | } |
| 1502 | else /* multibyte char */ |
| 1503 | { |
| 1504 | /* Add 0x20 to the base leading-code, keep the remaining |
| 1505 | bytes unchanged. */ |
| 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); |
| 1510 | buf[i] += 0x20; |
| 1511 | p += len, i += len; |
| 1512 | } |
| 1513 | } |
| 1514 | |
| 1515 | if (i < 5) |
| 1516 | /* STR contains only one character, which can't be composed. */ |
| 1517 | error ("Too short string to be composed: %s", XSTRING (str)->data); |
| 1518 | |
| 1519 | return make_string (buf, i); |
| 1520 | } |
| 1521 | |
| 1522 | \f |
| 1523 | charset_id_internal (charset_name) |
| 1524 | char *charset_name; |
| 1525 | { |
| 1526 | Lisp_Object val = Fget (intern (charset_name), Qcharset); |
| 1527 | |
| 1528 | if (!VECTORP (val)) |
| 1529 | error ("Charset %s is not defined", charset_name); |
| 1530 | |
| 1531 | return (XINT (XVECTOR (val)->contents[0])); |
| 1532 | } |
| 1533 | |
| 1534 | DEFUN ("setup-special-charsets", Fsetup_special_charsets, |
| 1535 | Ssetup_special_charsets, 0, 0, 0, "Internal use only.") |
| 1536 | () |
| 1537 | { |
| 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"); |
| 1545 | return Qnil; |
| 1546 | } |
| 1547 | |
| 1548 | init_charset_once () |
| 1549 | { |
| 1550 | int i, j, k; |
| 1551 | |
| 1552 | staticpro (&Vcharset_table); |
| 1553 | staticpro (&Vcharset_symbol_table); |
| 1554 | |
| 1555 | /* This has to be done here, before we call Fmake_char_table. */ |
| 1556 | Qcharset_table = intern ("charset-table"); |
| 1557 | staticpro (&Qcharset_table); |
| 1558 | |
| 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"); |
| 1563 | |
| 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); |
| 1568 | |
| 1569 | Vcharset_symbol_table = Fmake_vector (make_number (MAX_CHARSET + 1), Qnil); |
| 1570 | |
| 1571 | /* Setup tables. */ |
| 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; |
| 1576 | |
| 1577 | bzero (cmpchar_hash_table, sizeof cmpchar_hash_table); |
| 1578 | cmpchar_table_size = n_cmpchars = 0; |
| 1579 | |
| 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; |
| 1589 | |
| 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; |
| 1598 | } |
| 1599 | |
| 1600 | #ifdef emacs |
| 1601 | |
| 1602 | syms_of_charset () |
| 1603 | { |
| 1604 | Qascii = intern ("ascii"); |
| 1605 | staticpro (&Qascii); |
| 1606 | |
| 1607 | Qcharset = intern ("charset"); |
| 1608 | staticpro (&Qcharset); |
| 1609 | |
| 1610 | /* Define ASCII charset now. */ |
| 1611 | update_charset_table (make_number (CHARSET_ASCII), |
| 1612 | make_number (1), make_number (94), |
| 1613 | make_number (1), |
| 1614 | make_number (0), |
| 1615 | make_number ('B'), |
| 1616 | make_number (0), |
| 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)); |
| 1622 | |
| 1623 | Qcomposition = intern ("composition"); |
| 1624 | staticpro (&Qcomposition); |
| 1625 | CHARSET_SYMBOL (CHARSET_COMPOSITION) = Qcomposition; |
| 1626 | |
| 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); |
| 1651 | |
| 1652 | DEFVAR_LISP ("charset-list", &Vcharset_list, |
| 1653 | "List of charsets ever defined."); |
| 1654 | Vcharset_list = Fcons (Qascii, Qnil); |
| 1655 | |
| 1656 | DEFVAR_INT ("leading-code-composition", &leading_code_composition, |
| 1657 | "Leading-code of composite characters."); |
| 1658 | leading_code_composition = LEADING_CODE_COMPOSITION; |
| 1659 | |
| 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; |
| 1663 | |
| 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; |
| 1667 | |
| 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; |
| 1671 | |
| 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; |
| 1675 | } |
| 1676 | |
| 1677 | #endif /* emacs */ |