src/charset.h

   1 /* Header for charset handler.
   2    Copyright (C) 2001, 2002, 2003, 2004, 2005,
   3                  2006 Free Software Foundation, Inc.
   4    Copyright (C) 1995, 1997, 1998, 2003
   5      National Institute of Advanced Industrial Science and Technology (AIST)
   6      Registration Number H14PRO021
   7    Copyright (C) 2003
   8      National Institute of Advanced Industrial Science and Technology (AIST)
   9      Registration Number H13PRO009
  10
  11 This file is part of GNU Emacs.
  12
  13 GNU Emacs is free software; you can redistribute it and/or modify
  14 it under the terms of the GNU General Public License as published by
  15 the Free Software Foundation; either version 2, or (at your option)
  16 any later version.
  17
  18 GNU Emacs is distributed in the hope that it will be useful,
  19 but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 GNU General Public License for more details.
  22
  23 You should have received a copy of the GNU General Public License
  24 along with GNU Emacs; see the file COPYING.  If not, write to
  25 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  26 Boston, MA 02110-1301, USA.  */
  27
  28 #ifndef EMACS_CHARSET_H
  29 #define EMACS_CHARSET_H
  30
  31 /* Index to arguments of Fdefine_charset_internal.  */
  32
  33 enum define_charset_arg_index
  34   {
  35     charset_arg_name,
  36     charset_arg_dimension,
  37     charset_arg_code_space,
  38     charset_arg_min_code,
  39     charset_arg_max_code,
  40     charset_arg_iso_final,
  41     charset_arg_iso_revision,
  42     charset_arg_emacs_mule_id,
  43     charset_arg_ascii_compatible_p,
  44     charset_arg_supplementary_p,
  45     charset_arg_invalid_code,
  46     charset_arg_code_offset,
  47     charset_arg_map,
  48     charset_arg_subset,
  49     charset_arg_superset,
  50     charset_arg_unify_map,
  51     charset_arg_plist,
  52     charset_arg_max
  53   };
  54
  55
  56 /* Indices to charset attributes vector.  */
  57
  58 enum charset_attr_index
  59   {
  60     /* ID number of the charset.  */
  61     charset_id,
  62
  63     /* Name of the charset (symbol).  */
  64     charset_name,
  65
  66     /* Property list of the charset.  */
  67     charset_plist,
  68
  69     /* If the method of the charset is `MAP_DEFERRED', the value is a
  70        mapping vector or a file name that contains mapping vector.
  71        Otherwise, nil.  */
  72     charset_map,
  73
  74     /* If the method of the charset is `MAP', the value is a vector
  75        that maps code points of the charset to characters.  The vector
  76        is indexed by a character index.  A character index is
  77        calculated from a code point and the code-space table of the
  78        charset.  */
  79     charset_decoder,
  80
  81     /* If the method of the charset is `MAP', the value is a
  82        char-table that maps characters of the charset to code
  83        points.  */
  84     charset_encoder,
  85
  86     /* If the method of the charset is `SUBSET', the value is a vector
  87        that has this form:
  88
  89         [ CHARSET-ID MIN-CODE MAX-CODE OFFSET ]
  90
  91        CHARSET-ID is an ID number of a parent charset.  MIN-CODE and
  92        MAX-CODE specify the range of characters inherited from the
  93        parent.  OFFSET is an integer value to add to a code point of
  94        the parent charset to get the corresponding code point of this
  95        charset.  */
  96     charset_subset,
  97
  98     /* If the method of the charset is `SUPERSET', the value is a list
  99        whose elements have this form:
 100
 101         (CHARSET-ID . OFFSET)
 102
 103       CHARSET-IDs are ID numbers of parent charsets.  OFFSET is an
 104       integer value to add to a code point of the parent charset to
 105       get the corresponding code point of this charset.  */
 106     charset_superset,
 107
 108     /* The value is a mapping vector or a file name that contains the
 109        mapping.  This defines how characters in the charset should be
 110        unified with Unicode.  The value of the member
 111        `charset_deunifier' is created from this information.  */
 112     charset_unify_map,
 113
 114     /* If characters in the charset must be unified Unicode, the value
 115        is a char table that maps a unified Unicode character code to
 116        the non-unified character code in the charset.  */
 117     charset_deunifier,
 118
 119     /* The length of the charset attribute vector.  */
 120     charset_attr_max
 121   };
 122
 123 /* Methods for converting code points and characters of charsets.  */
 124
 125 enum charset_method
 126   {
 127     /* For a charset of this method, a character code is calculated
 128        from a character index (which is calculated from a code point)
 129        simply by adding an offset value.  */
 130     CHARSET_METHOD_OFFSET,
 131
 132     /* For a charset of this method, a decoder vector and an encoder
 133        char-table is used for code point <-> character code
 134        conversion.  */
 135     CHARSET_METHOD_MAP,
 136
 137     /* Same as above but decoder and encoder are loaded from a file on
 138        demand.  Once loaded, the method is changed to
 139        CHARSET_METHOD_MAP.  */
 140     CHARSET_METHOD_MAP_DEFERRED,
 141
 142     /* A charset of this method is a subset of another charset.  */
 143     CHARSET_METHOD_SUBSET,
 144
 145     /* A charset of this method is a superset of other charsets.  */
 146     CHARSET_METHOD_SUPERSET
 147   };
 148
 149 struct charset
 150 {
 151   /* Index to charset_table.  */
 152   int id;
 153
 154   /* Index to Vcharset_hash_table.  */
 155   int hash_index;
 156
 157   /* Dimension of the charset: 1, 2, 3, or 4.  */
 158   int dimension;
 159
 160   /* Byte code range of each dimension.  <code_space>[4N] is a mininum
 161      byte code of the (N+1)th dimension, <code_space>[4N+1] is a
 162      maximum byte code of the (N+1)th dimension, <code_space>[4N+2] is
 163      (<code_space>[4N+1] - <code_space>[4N] + 1), <code_space>[4N+3]
 164      is a number of characters containd in the first to (N+1)th
 165      dismesions.  We get `char-index' of a `code-point' from this
 166      information.  */
 167   int code_space[16];
 168
 169   /* If B is a byte of Nth dimension of a code-point, the (N-1)th bit
 170      of code_space_mask[B] is set.  This array is used to quickly
 171      check if a code-point is in a valid range.  */
 172   unsigned char *code_space_mask;
 173
 174   /* 1 if there's no gap in code-points.  */
 175   int code_linear_p;
 176
 177   /* If the charset is treated as 94-chars in ISO-2022, the value is 0.
 178      If the charset is treated as 96-chars in ISO-2022, the value is 1.  */
 179   int iso_chars_96;
 180
 181   /* ISO final byte of the charset: 48..127.  It may be -1 if the
 182      charset doesn't conform to ISO-2022.  */
 183   int iso_final;
 184
 185   /* ISO revision number of the charset.  */
 186   int iso_revision;
 187
 188   /* If the charset is identical to what supported by Emacs 21 and the
 189      priors, the identification number of the charset used in those
 190      version.  Otherwise, -1.  */
 191   int emacs_mule_id;
 192
 193   /* Nonzero iff the charset is compatible with ASCII.  */
 194   int ascii_compatible_p;
 195
 196   /* Nonzero iff the charset is supplementary.  */
 197   int supplementary_p;
 198
 199   /* Nonzero iff all the code points are representable by Lisp_Int.  */
 200   int compact_codes_p;
 201
 202   /* The method for encoding/decoding characters of the charset.  */
 203   enum charset_method method;
 204
 205   /* Mininum and Maximum code points of the charset.  */
 206   unsigned min_code, max_code;
 207
 208   /* Offset value used by macros CODE_POINT_TO_INDEX and
 209       INDEX_TO_CODE_POINT. .  */
 210   unsigned char_index_offset;
 211
 212   /* Mininum and Maximum character codes of the charset.  If the
 213      charset is compatible with ASCII, min_char is a minimum non-ASCII
 214      character of the charset.  If the method of charset is
 215      CHARSET_METHOD_OFFSET, even if the charset is unified, min_char
 216      and max_char doesn't change.  */
 217   int min_char, max_char;
 218
 219   /* The code returned by ENCODE_CHAR if a character is not encodable
 220      by the charset.  */
 221   unsigned invalid_code;
 222
 223   /* If the method of the charset is CHARSET_METHOD_MAP, this is a
 224      table of bits used to quickly and roughly guess if a character
 225      belongs to the charset.
 226
 227      The first 64 elements are 512 bits for characters less than
 228      0x10000.  Each bit corresponds to 128-character block.  The last
 229      126 elements are 1008 bits for the greater characters
 230      (0x10000..0x3FFFFF).  Each bit corresponds to 4096-character
 231      block.
 232
 233      If a bit is 1, at least one character in the corresponding block is
 234      in this charset.  */
 235   unsigned char fast_map[190];
 236
 237   /* Offset value to calculate a character code from code-point, and
 238      visa versa.  */
 239   int code_offset;
 240
 241   int unified_p;
 242 };
 243
 244 /* Hash table of charset symbols vs. the correponding attribute
 245    vectors.  */
 246 extern Lisp_Object Vcharset_hash_table;
 247
 248 /* Table of struct charset.  */
 249 extern struct charset *charset_table;
 250
 251 #define CHARSET_FROM_ID(id) (charset_table + (id))
 252
 253 extern Lisp_Object Vcharset_ordered_list;
 254
 255 /* Incremented everytime we change the priority of charsets.  */
 256 extern unsigned short charset_ordered_list_tick;
 257
 258 extern Lisp_Object Vcharset_list;
 259 extern Lisp_Object Viso_2022_charset_list;
 260 extern Lisp_Object Vemacs_mule_charset_list;
 261
 262 extern struct charset *emacs_mule_charset[256];
 263
 264
 265 /* Macros to access information about charset.  */
 266
 267 /* Return the attribute vector of charset whose symbol is SYMBOL.  */
 268 #define CHARSET_SYMBOL_ATTRIBUTES(symbol)       \
 269   Fgethash ((symbol), Vcharset_hash_table, Qnil)
 270
 271 #define CHARSET_ATTR_ID(attrs)          AREF ((attrs), charset_id)
 272 #define CHARSET_ATTR_NAME(attrs)        AREF ((attrs), charset_name)
 273 #define CHARSET_ATTR_PLIST(attrs)       AREF ((attrs), charset_plist)
 274 #define CHARSET_ATTR_MAP(attrs)         AREF ((attrs), charset_map)
 275 #define CHARSET_ATTR_DECODER(attrs)     AREF ((attrs), charset_decoder)
 276 #define CHARSET_ATTR_ENCODER(attrs)     AREF ((attrs), charset_encoder)
 277 #define CHARSET_ATTR_SUBSET(attrs)      AREF ((attrs), charset_subset)
 278 #define CHARSET_ATTR_SUPERSET(attrs)    AREF ((attrs), charset_superset)
 279 #define CHARSET_ATTR_UNIFY_MAP(attrs)   AREF ((attrs), charset_unify_map)
 280 #define CHARSET_ATTR_DEUNIFIER(attrs)   AREF ((attrs), charset_deunifier)
 281
 282 #define CHARSET_SYMBOL_ID(symbol)       \
 283   CHARSET_ATTR_ID (CHARSET_SYMBOL_ATTRIBUTES (symbol))
 284
 285 /* Return an index to Vcharset_hash_table of the charset whose symbol
 286    is SYMBOL.  */
 287 #define CHARSET_SYMBOL_HASH_INDEX(symbol)       \
 288   hash_lookup (XHASH_TABLE (Vcharset_hash_table), symbol, NULL)
 289
 290 /* Return the attribute vector of CHARSET.  */
 291 #define CHARSET_ATTRIBUTES(charset)     \
 292   (HASH_VALUE (XHASH_TABLE (Vcharset_hash_table), (charset)->hash_index))
 293
 294 #define CHARSET_ID(charset)             ((charset)->id)
 295 #define CHARSET_HASH_INDEX(charset)     ((charset)->hash_index)
 296 #define CHARSET_DIMENSION(charset)      ((charset)->dimension)
 297 #define CHARSET_CODE_SPACE(charset)     ((charset)->code_space)
 298 #define CHARSET_CODE_LINEAR_P(charset)  ((charset)->code_linear_p)
 299 #define CHARSET_ISO_CHARS_96(charset)   ((charset)->iso_chars_96)
 300 #define CHARSET_ISO_FINAL(charset)      ((charset)->iso_final)
 301 #define CHARSET_ISO_PLANE(charset)      ((charset)->iso_plane)
 302 #define CHARSET_ISO_REVISION(charset)   ((charset)->iso_revision)
 303 #define CHARSET_EMACS_MULE_ID(charset)  ((charset)->emacs_mule_id)
 304 #define CHARSET_ASCII_COMPATIBLE_P(charset) ((charset)->ascii_compatible_p)
 305 #define CHARSET_COMPACT_CODES_P(charset) ((charset)->compact_codes_p)
 306 #define CHARSET_METHOD(charset)         ((charset)->method)
 307 #define CHARSET_MIN_CODE(charset)       ((charset)->min_code)
 308 #define CHARSET_MAX_CODE(charset)       ((charset)->max_code)
 309 #define CHARSET_INVALID_CODE(charset)   ((charset)->invalid_code)
 310 #define CHARSET_MIN_CHAR(charset)       ((charset)->min_char)
 311 #define CHARSET_MAX_CHAR(charset)       ((charset)->max_char)
 312 #define CHARSET_CODE_OFFSET(charset)    ((charset)->code_offset)
 313 #define CHARSET_UNIFIED_P(charset)      ((charset)->unified_p)
 314
 315 #define CHARSET_NAME(charset)           \
 316   (CHARSET_ATTR_NAME (CHARSET_ATTRIBUTES (charset)))
 317 #define CHARSET_MAP(charset)    \
 318   (CHARSET_ATTR_MAP (CHARSET_ATTRIBUTES (charset)))
 319 #define CHARSET_DECODER(charset)        \
 320   (CHARSET_ATTR_DECODER (CHARSET_ATTRIBUTES (charset)))
 321 #define CHARSET_ENCODER(charset)        \
 322   (CHARSET_ATTR_ENCODER (CHARSET_ATTRIBUTES (charset)))
 323 #define CHARSET_SUBSET(charset) \
 324   (CHARSET_ATTR_SUBSET (CHARSET_ATTRIBUTES (charset)))
 325 #define CHARSET_SUPERSET(charset)       \
 326   (CHARSET_ATTR_SUPERSET (CHARSET_ATTRIBUTES (charset)))
 327 #define CHARSET_UNIFY_MAP(charset)      \
 328   (CHARSET_ATTR_UNIFY_MAP (CHARSET_ATTRIBUTES (charset)))
 329 #define CHARSET_DEUNIFIER(charset)      \
 330   (CHARSET_ATTR_DEUNIFIER (CHARSET_ATTRIBUTES (charset)))
 331
 332
 333 /* Nonzero iff OBJ is a valid charset symbol.  */
 334 #define CHARSETP(obj) (CHARSET_SYMBOL_HASH_INDEX (obj) >= 0)
 335
 336 /* Check if X is a valid charset symbol.  If not, signal an error.  */
 337 #define CHECK_CHARSET(x)                                        \
 338   do {                                                          \
 339     if (! SYMBOLP (x) || CHARSET_SYMBOL_HASH_INDEX (x) < 0)     \
 340       x = wrong_type_argument (Qcharsetp, (x));                 \
 341   } while (0)
 342
 343
 344 /* Check if X is a valid charset symbol.  If valid, set ID to the id
 345    number of the charset.  Otherwise, signal an error. */
 346 #define CHECK_CHARSET_GET_ID(x, id)                                     \
 347   do {                                                                  \
 348     int idx;                                                            \
 349                                                                         \
 350     if (! SYMBOLP (x) || (idx = CHARSET_SYMBOL_HASH_INDEX (x)) < 0)     \
 351       x = wrong_type_argument (Qcharsetp, (x));                         \
 352     id = XINT (AREF (HASH_VALUE (XHASH_TABLE (Vcharset_hash_table), idx), \
 353                      charset_id));                                      \
 354   } while (0)
 355
 356
 357 /* Check if X is a valid charset symbol.  If valid, set ATTR to the
 358    attr vector of the charset.  Otherwise, signal an error. */
 359 #define CHECK_CHARSET_GET_ATTR(x, attr)                         \
 360   do {                                                                  \
 361     if (!SYMBOLP (x) || NILP (attr = CHARSET_SYMBOL_ATTRIBUTES (x)))    \
 362       x = wrong_type_argument (Qcharsetp, (x));                         \
 363   } while (0)
 364
 365
 366 #define CHECK_CHARSET_GET_CHARSET(x, charset)   \
 367   do {                                          \
 368     int id;                                     \
 369     CHECK_CHARSET_GET_ID (x, id);               \
 370     charset = CHARSET_FROM_ID (id);             \
 371   } while (0)
 372
 373
 374 /* Lookup Vcharset_order_list and return the first charset that
 375    contains the character C.  */
 376 #define CHAR_CHARSET(c)                         \
 377   ((c) < 0x80 ? CHARSET_FROM_ID (charset_ascii) \
 378    : char_charset ((c), Qnil, NULL))
 379
 380 #if 0
 381 /* Char-table of charset-sets.  Each element is a bool vector indexed
 382    by a charset ID.  */
 383 extern Lisp_Object Vchar_charset_set;
 384
 385 /* Charset-bag of character C.  */
 386 #define CHAR_CHARSET_SET(c) \
 387   CHAR_TABLE_REF (Vchar_charset_set, c)
 388
 389 /* Check if two characters C1 and C2 belong to the same charset.  */
 390 #define SAME_CHARSET_P(c1, c2)  \
 391   intersection_p (CHAR_CHARSET_SET (c1), CHAR_CHARSET_SET (c2))
 392
 393 #endif
 394
 395
 396 /* Return a character correponding to the code-point CODE of CHARSET.
 397    Try some optimization before calling decode_char.  */
 398
 399 #define DECODE_CHAR(charset, code)                                      \
 400   ((ASCII_BYTE_P (code) && (charset)->ascii_compatible_p)               \
 401    ? (code)                                                             \
 402    : ((code) < (charset)->min_code || (code) > (charset)->max_code)     \
 403    ? -1                                                                 \
 404    : (charset)->unified_p                                               \
 405    ? decode_char ((charset), (code))                                    \
 406    : (charset)->method == CHARSET_METHOD_OFFSET                         \
 407    ? ((charset)->code_linear_p                                          \
 408       ? (code) - (charset)->min_code + (charset)->code_offset           \
 409       : decode_char ((charset), (code)))                                \
 410    : (charset)->method == CHARSET_METHOD_MAP                            \
 411    ? ((charset)->code_linear_p                                          \
 412       ? XINT (AREF (CHARSET_DECODER (charset),                          \
 413                         (code) - (charset)->min_code))                  \
 414       : decode_char ((charset), (code)))                                \
 415    : decode_char ((charset), (code)))
 416
 417
 418 /* If CHARSET is a simple offset base charset, return it's offset,
 419    otherwise return -1.  */
 420 #define CHARSET_OFFSET(charset)                         \
 421   (((charset)->method == CHARSET_METHOD_OFFSET          \
 422     && (charset)->code_linear_p                         \
 423     && ! (charset)->unified_p)                          \
 424    ? (charset)->code_offset - (charset)->min_code       \
 425    : -1)
 426
 427 extern Lisp_Object charset_work;
 428
 429 /* Return a code point of CHAR in CHARSET.
 430    Try some optimization before calling encode_char.  */
 431
 432 #define ENCODE_CHAR(charset, c)                                          \
 433   ((ASCII_CHAR_P (c) && (charset)->ascii_compatible_p)                   \
 434    ? (c)                                                                 \
 435    : ((charset)->unified_p                                               \
 436       || (charset)->method == CHARSET_METHOD_SUBSET                      \
 437       || (charset)->method == CHARSET_METHOD_SUPERSET)                   \
 438    ? encode_char ((charset), (c))                                        \
 439    : ((c) < (charset)->min_char || (c) > (charset)->max_char)            \
 440    ? (charset)->invalid_code                                             \
 441    : (charset)->method == CHARSET_METHOD_OFFSET                          \
 442    ? ((charset)->code_linear_p                                           \
 443       ? (c) - (charset)->code_offset + (charset)->min_code               \
 444       : encode_char ((charset), (c)))                                    \
 445    : (charset)->method == CHARSET_METHOD_MAP                             \
 446    ? ((charset)->compact_codes_p                                         \
 447       ? (charset_work = CHAR_TABLE_REF (CHARSET_ENCODER (charset), (c)), \
 448          (NILP (charset_work)                                            \
 449           ? (charset)->invalid_code                                      \
 450           : XFASTINT (charset_work)))                                    \
 451       : encode_char ((charset), (c)))                                    \
 452    : encode_char ((charset), (c)))
 453
 454
 455 /* Set to 1 when a charset map is loaded to warn that a buffer text
 456    and a string data may be relocated.  */
 457 extern int charset_map_loaded;
 458
 459
 460 /* Set CHARSET to the charset highest priority of C, CODE to the
 461    code-point of C in CHARSET.  */
 462 #define SPLIT_CHAR(c, charset, code)    \
 463   ((charset) = char_charset ((c), Qnil, &(code)))
 464
 465
 466 #define ISO_MAX_DIMENSION 3
 467 #define ISO_MAX_CHARS 2
 468 #define ISO_MAX_FINAL 0x80      /* only 0x30..0xFF are used */
 469
 470 /* Mapping table from ISO2022's charset (specified by DIMENSION,
 471    CHARS, and FINAL_CHAR) to Emacs' charset ID.  Should be accessed by
 472    macro ISO_CHARSET_TABLE (DIMENSION, CHARS, FINAL_CHAR).  */
 473 extern int iso_charset_table[ISO_MAX_DIMENSION][ISO_MAX_CHARS][ISO_MAX_FINAL];
 474
 475 /* A charset of type iso2022 who has DIMENSION, CHARS, and FINAL
 476    (final character).  */
 477 #define ISO_CHARSET_TABLE(dimension, chars_96, final)   \
 478   iso_charset_table[(dimension) - 1][(chars_96)][(final)]
 479
 480 /* Nonzero iff the charset who has FAST_MAP may contain C.  */
 481 #define CHARSET_FAST_MAP_REF(c, fast_map)               \
 482   ((c) < 0x10000                                        \
 483    ? fast_map[(c) >> 10] & (1 << (((c) >> 7) & 7))      \
 484    : fast_map[((c) >> 15) + 62] & (1 << (((c) >> 12) & 7)))
 485
 486 #define CHARSET_FAST_MAP_SET(c, fast_map)                       \
 487   do {                                                          \
 488     if ((c) < 0x10000)                                          \
 489       (fast_map)[(c) >> 10] |= 1 << (((c) >> 7) & 7);           \
 490     else                                                        \
 491       (fast_map)[((c) >> 15) + 62] |= 1 << (((c) >> 12) & 7);   \
 492   } while (0)
 493
 494
 495
 496 /* 1 iff CHARSET may contain the character C.  */
 497 #define CHAR_CHARSET_P(c, charset)                                       \
 498   ((ASCII_CHAR_P (c) && (charset)->ascii_compatible_p)                   \
 499    || ((CHARSET_UNIFIED_P (charset)                                      \
 500         || (charset)->method == CHARSET_METHOD_SUBSET                    \
 501         || (charset)->method == CHARSET_METHOD_SUPERSET)                 \
 502        ? encode_char ((charset), (c)) != (charset)->invalid_code         \
 503        : (CHARSET_FAST_MAP_REF ((c), (charset)->fast_map)                \
 504           && ((charset)->method == CHARSET_METHOD_OFFSET                 \
 505               ? (c) >= (charset)->min_char && (c) <= (charset)->max_char \
 506               : ((charset)->method == CHARSET_METHOD_MAP                 \
 507                  && (charset)->compact_codes_p)                          \
 508               ? ! NILP (CHAR_TABLE_REF (CHARSET_ENCODER (charset), (c))) \
 509               : encode_char ((charset), (c)) != (charset)->invalid_code))))
 510
 511 \f
 512 /* Special macros for emacs-mule encoding.  */
 513
 514 /* Leading-code followed by extended leading-code.    DIMENSION/COLUMN */
 515 #define EMACS_MULE_LEADING_CODE_PRIVATE_11      0x9A /* 1/1 */
 516 #define EMACS_MULE_LEADING_CODE_PRIVATE_12      0x9B /* 1/2 */
 517 #define EMACS_MULE_LEADING_CODE_PRIVATE_21      0x9C /* 2/2 */
 518 #define EMACS_MULE_LEADING_CODE_PRIVATE_22      0x9D /* 2/2 */
 519
 520 extern struct charset *emacs_mule_charset[256];
 521
 522 \f
 523
 524 extern Lisp_Object Qcharsetp;
 525
 526 extern Lisp_Object Qascii, Qunicode;
 527 extern int charset_ascii, charset_eight_bit;
 528 extern int charset_iso_8859_1;
 529 extern int charset_unicode;
 530 extern int charset_jisx0201_roman;
 531 extern int charset_jisx0208_1978;
 532 extern int charset_jisx0208;
 533
 534 extern int charset_unibyte;
 535
 536 extern struct charset *char_charset P_ ((int, Lisp_Object, unsigned *));
 537 extern Lisp_Object charset_attributes P_ ((int));
 538
 539 extern int decode_char P_ ((struct charset *, unsigned));
 540 extern unsigned encode_char P_ ((struct charset *, int));
 541 extern int string_xstring_p P_ ((Lisp_Object));
 542
 543 extern void map_charset_chars P_ ((void (*) (Lisp_Object, Lisp_Object),
 544                                    Lisp_Object, Lisp_Object,
 545                                    struct charset *, unsigned, unsigned));
 546
 547 EXFUN (Funify_charset, 3);
 548
 549 #endif /* EMACS_CHARSET_H */
 550
 551 /* arch-tag: 3b96db55-4961-481d-ac3e-219f46a2b3aa
 552    (do not change this comment) */