code.delx.au - gnu-emacs/blob - src/charset.h

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