code.delx.au - gnu-emacs/blob - 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, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   5      2005, 2006
   6      National Institute of Advanced Industrial Science and Technology (AIST)
   7      Registration Number H14PRO021
   8    Copyright (C) 2003
   9      National Institute of Advanced Industrial Science and Technology (AIST)
  10      Registration Number H13PRO009
  11
  12 This file is part of GNU Emacs.
  13
  14 GNU Emacs is free software; you can redistribute it and/or modify
  15 it under the terms of the GNU General Public License as published by
  16 the Free Software Foundation; either version 2, or (at your option)
  17 any later version.
  18
  19 GNU Emacs is distributed in the hope that it will be useful,
  20 but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 GNU General Public License for more details.
  23
  24 You should have received a copy of the GNU General Public License
  25 along with GNU Emacs; see the file COPYING.  If not, write to
  26 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  27 Boston, MA 02110-1301, USA.  */
  28
  29 #ifndef EMACS_CHARSET_H
  30 #define EMACS_CHARSET_H
  31
  32 /* Index to arguments of Fdefine_charset_internal.  */
  33
  34 enum define_charset_arg_index
  35   {
  36     charset_arg_name,
  37     charset_arg_dimension,
  38     charset_arg_code_space,
  39     charset_arg_min_code,
  40     charset_arg_max_code,
  41     charset_arg_iso_final,
  42     charset_arg_iso_revision,
  43     charset_arg_emacs_mule_id,
  44     charset_arg_ascii_compatible_p,
  45     charset_arg_supplementary_p,
  46     charset_arg_invalid_code,
  47     charset_arg_code_offset,
  48     charset_arg_map,
  49     charset_arg_subset,
  50     charset_arg_superset,
  51     charset_arg_unify_map,
  52     charset_arg_plist,
  53     charset_arg_max
  54   };
  55
  56
  57 /* Indices to charset attributes vector.  */
  58
  59 enum charset_attr_index
  60   {
  61     /* ID number of the charset.  */
  62     charset_id,
  63
  64     /* Name of the charset (symbol).  */
  65     charset_name,
  66
  67     /* Property list of the charset.  */
  68     charset_plist,
  69
  70     /* If the method of the charset is `MAP_DEFERRED', the value is a
  71        mapping vector or a file name that contains mapping vector.
  72        Otherwise, nil.  */
  73     charset_map,
  74
  75     /* If the method of the charset is `MAP', the value is a vector
  76        that maps code points of the charset to characters.  The vector
  77        is indexed by a character index.  A character index is
  78        calculated from a code point and the code-space table of the
  79        charset.  */
  80     charset_decoder,
  81
  82     /* If the method of the charset is `MAP', the value is a
  83        char-table that maps characters of the charset to code
  84        points.  */
  85     charset_encoder,
  86
  87     /* If the method of the charset is `SUBSET', the value is a vector
  88        that has this form:
  89
  90         [ CHARSET-ID MIN-CODE MAX-CODE OFFSET ]
  91
  92        CHARSET-ID is an ID number of a parent charset.  MIN-CODE and
  93        MAX-CODE specify the range of characters inherited from the
  94        parent.  OFFSET is an integer value to add to a code point of
  95        the parent charset to get the corresponding code point of this
  96        charset.  */
  97     charset_subset,
  98
  99     /* If the method of the charset is `SUPERSET', the value is a list
 100        whose elements have this form:
 101
 102         (CHARSET-ID . OFFSET)
 103
 104       CHARSET-IDs are ID numbers of parent charsets.  OFFSET is an
 105       integer value to add to a code point of the parent charset to
 106       get the corresponding code point of this charset.  */
 107     charset_superset,
 108
 109     /* The value is a mapping vector or a file name that contains the
 110        mapping.  This defines how characters in the charset should be
 111        unified with Unicode.  The value of the member
 112        `charset_deunifier' is created from this information.  */
 113     charset_unify_map,
 114
 115     /* If characters in the charset must be unified Unicode, the value
 116        is a char table that maps a unified Unicode character code to
 117        the non-unified character code in the charset.  */
 118     charset_deunifier,
 119
 120     /* The length of the charset attribute vector.  */
 121     charset_attr_max
 122   };
 123
 124 /* Methods for converting code points and characters of charsets.  */
 125
 126 enum charset_method
 127   {
 128     /* For a charset of this method, a character code is calculated
 129        from a character index (which is calculated from a code point)
 130        simply by adding an offset value.  */
 131     CHARSET_METHOD_OFFSET,
 132
 133     /* For a charset of this method, a decoder vector and an encoder
 134        char-table is used for code point <-> character code
 135        conversion.  */
 136     CHARSET_METHOD_MAP,
 137
 138     /* Same as above but decoder and encoder are loaded from a file on
 139        demand.  Once loaded, the method is changed to
 140        CHARSET_METHOD_MAP.  */
 141     CHARSET_METHOD_MAP_DEFERRED,
 142
 143     /* A charset of this method is a subset of another charset.  */
 144     CHARSET_METHOD_SUBSET,
 145
 146     /* A charset of this method is a superset of other charsets.  */
 147     CHARSET_METHOD_SUPERSET
 148   };
 149
 150 struct charset
 151 {
 152   /* Index to charset_table.  */
 153   int id;
 154
 155   /* Index to Vcharset_hash_table.  */
 156   int hash_index;
 157
 158   /* Dimension of the charset: 1, 2, 3, or 4.  */
 159   int dimension;
 160
 161   /* Byte code range of each dimension.  <code_space>[4N] is a mininum
 162      byte code of the (N+1)th dimension, <code_space>[4N+1] is a
 163      maximum byte code of the (N+1)th dimension, <code_space>[4N+2] is
 164      (<code_space>[4N+1] - <code_space>[4N] + 1), <code_space>[4N+3]
 165      is a number of characters containd in the first to (N+1)th
 166      dismesions.  We get `char-index' of a `code-point' from this
 167      information.  */
 168   int code_space[16];
 169
 170   /* If B is a byte of Nth dimension of a code-point, the (N-1)th bit
 171      of code_space_mask[B] is set.  This array is used to quickly
 172      check if a code-point is in a valid range.  */
 173   unsigned char *code_space_mask;
 174
 175   /* 1 if there's no gap in code-points.  */
 176   int code_linear_p;
 177
 178   /* If the charset is treated as 94-chars in ISO-2022, the value is 0.
 179      If the charset is treated as 96-chars in ISO-2022, the value is 1.  */
 180   int iso_chars_96;
 181
 182   /* ISO final byte of the charset: 48..127.  It may be -1 if the
 183      charset doesn't conform to ISO-2022.  */
 184   int iso_final;
 185
 186   /* ISO revision number of the charset.  */
 187   int iso_revision;
 188
 189   /* If the charset is identical to what supported by Emacs 21 and the
 190      priors, the identification number of the charset used in those
 191      version.  Otherwise, -1.  */
 192   int emacs_mule_id;
 193
 194   /* Nonzero iff the charset is compatible with ASCII.  */
 195   int ascii_compatible_p;
 196
 197   /* Nonzero iff the charset is supplementary.  */
 198   int supplementary_p;
 199
 200   /* Nonzero iff all the code points are representable by Lisp_Int.  */
 201   int compact_codes_p;
 202
 203   /* The method for encoding/decoding characters of the charset.  */
 204   enum charset_method method;
 205
 206   /* Mininum and Maximum code points of the charset.  */
 207   unsigned min_code, max_code;
 208
 209   /* Offset value used by macros CODE_POINT_TO_INDEX and
 210       INDEX_TO_CODE_POINT. .  */
 211   unsigned char_index_offset;
 212
 213   /* Mininum and Maximum character codes of the charset.  If the
 214      charset is compatible with ASCII, min_char is a minimum non-ASCII
 215      character of the charset.  If the method of charset is
 216      CHARSET_METHOD_OFFSET, even if the charset is unified, min_char
 217      and max_char doesn't change.  */
 218   int min_char, max_char;
 219
 220   /* The code returned by ENCODE_CHAR if a character is not encodable
 221      by the charset.  */
 222   unsigned invalid_code;
 223
 224   /* If the method of the charset is CHARSET_METHOD_MAP, this is a
 225      table of bits used to quickly and roughly guess if a character
 226      belongs to the charset.
 227
 228      The first 64 elements are 512 bits for characters less than
 229      0x10000.  Each bit corresponds to 128-character block.  The last
 230      126 elements are 1008 bits for the greater characters
 231      (0x10000..0x3FFFFF).  Each bit corresponds to 4096-character
 232      block.
 233
 234      If a bit is 1, at least one character in the corresponding block is
 235      in this charset.  */
 236   unsigned char fast_map[190];
 237
 238   /* Offset value to calculate a character code from code-point, and
 239      visa versa.  */
 240   int code_offset;
 241
 242   int unified_p;
 243 };
 244
 245 /* Hash table of charset symbols vs. the correponding attribute
 246    vectors.  */
 247 extern Lisp_Object Vcharset_hash_table;
 248
 249 /* Table of struct charset.  */
 250 extern struct charset *charset_table;
 251
 252 #define CHARSET_FROM_ID(id) (charset_table + (id))
 253
 254 extern Lisp_Object Vcharset_ordered_list;
 255
 256 /* Incremented everytime we change the priority of charsets.  */
 257 extern unsigned short charset_ordered_list_tick;
 258
 259 extern Lisp_Object Vcharset_list;
 260 extern Lisp_Object Viso_2022_charset_list;
 261 extern Lisp_Object Vemacs_mule_charset_list;
 262
 263 extern struct charset *emacs_mule_charset[256];
 264
 265
 266 /* Macros to access information about charset.  */
 267
 268 /* Return the attribute vector of charset whose symbol is SYMBOL.  */
 269 #define CHARSET_SYMBOL_ATTRIBUTES(symbol)       \
 270   Fgethash ((symbol), Vcharset_hash_table, Qnil)
 271
 272 #define CHARSET_ATTR_ID(attrs)          AREF ((attrs), charset_id)
 273 #define CHARSET_ATTR_NAME(attrs)        AREF ((attrs), charset_name)
 274 #define CHARSET_ATTR_PLIST(attrs)       AREF ((attrs), charset_plist)
 275 #define CHARSET_ATTR_MAP(attrs)         AREF ((attrs), charset_map)
 276 #define CHARSET_ATTR_DECODER(attrs)     AREF ((attrs), charset_decoder)
 277 #define CHARSET_ATTR_ENCODER(attrs)     AREF ((attrs), charset_encoder)
 278 #define CHARSET_ATTR_SUBSET(attrs)      AREF ((attrs), charset_subset)
 279 #define CHARSET_ATTR_SUPERSET(attrs)    AREF ((attrs), charset_superset)
 280 #define CHARSET_ATTR_UNIFY_MAP(attrs)   AREF ((attrs), charset_unify_map)
 281 #define CHARSET_ATTR_DEUNIFIER(attrs)   AREF ((attrs), charset_deunifier)
 282
 283 #define CHARSET_SYMBOL_ID(symbol)       \
 284   CHARSET_ATTR_ID (CHARSET_SYMBOL_ATTRIBUTES (symbol))
 285
 286 /* Return an index to Vcharset_hash_table of the charset whose symbol
 287    is SYMBOL.  */
 288 #define CHARSET_SYMBOL_HASH_INDEX(symbol)       \
 289   hash_lookup (XHASH_TABLE (Vcharset_hash_table), symbol, NULL)
 290
 291 /* Return the attribute vector of CHARSET.  */
 292 #define CHARSET_ATTRIBUTES(charset)     \
 293   (HASH_VALUE (XHASH_TABLE (Vcharset_hash_table), (charset)->hash_index))
 294
 295 #define CHARSET_ID(charset)             ((charset)->id)
 296 #define CHARSET_HASH_INDEX(charset)     ((charset)->hash_index)
 297 #define CHARSET_DIMENSION(charset)      ((charset)->dimension)
 298 #define CHARSET_CODE_SPACE(charset)     ((charset)->code_space)
 299 #define CHARSET_CODE_LINEAR_P(charset)  ((charset)->code_linear_p)
 300 #define CHARSET_ISO_CHARS_96(charset)   ((charset)->iso_chars_96)
 301 #define CHARSET_ISO_FINAL(charset)      ((charset)->iso_final)
 302 #define CHARSET_ISO_PLANE(charset)      ((charset)->iso_plane)
 303 #define CHARSET_ISO_REVISION(charset)   ((charset)->iso_revision)
 304 #define CHARSET_EMACS_MULE_ID(charset)  ((charset)->emacs_mule_id)
 305 #define CHARSET_ASCII_COMPATIBLE_P(charset) ((charset)->ascii_compatible_p)
 306 #define CHARSET_COMPACT_CODES_P(charset) ((charset)->compact_codes_p)
 307 #define CHARSET_METHOD(charset)         ((charset)->method)
 308 #define CHARSET_MIN_CODE(charset)       ((charset)->min_code)
 309 #define CHARSET_MAX_CODE(charset)       ((charset)->max_code)
 310 #define CHARSET_INVALID_CODE(charset)   ((charset)->invalid_code)
 311 #define CHARSET_MIN_CHAR(charset)       ((charset)->min_char)
 312 #define CHARSET_MAX_CHAR(charset)       ((charset)->max_char)
 313 #define CHARSET_CODE_OFFSET(charset)    ((charset)->code_offset)
 314 #define CHARSET_UNIFIED_P(charset)      ((charset)->unified_p)
 315
 316 #define CHARSET_NAME(charset)           \
 317   (CHARSET_ATTR_NAME (CHARSET_ATTRIBUTES (charset)))
 318 #define CHARSET_MAP(charset)    \
 319   (CHARSET_ATTR_MAP (CHARSET_ATTRIBUTES (charset)))
 320 #define CHARSET_DECODER(charset)        \
 321   (CHARSET_ATTR_DECODER (CHARSET_ATTRIBUTES (charset)))
 322 #define CHARSET_ENCODER(charset)        \
 323   (CHARSET_ATTR_ENCODER (CHARSET_ATTRIBUTES (charset)))
 324 #define CHARSET_SUBSET(charset) \
 325   (CHARSET_ATTR_SUBSET (CHARSET_ATTRIBUTES (charset)))
 326 #define CHARSET_SUPERSET(charset)       \
 327   (CHARSET_ATTR_SUPERSET (CHARSET_ATTRIBUTES (charset)))
 328 #define CHARSET_UNIFY_MAP(charset)      \
 329   (CHARSET_ATTR_UNIFY_MAP (CHARSET_ATTRIBUTES (charset)))
 330 #define CHARSET_DEUNIFIER(charset)      \
 331   (CHARSET_ATTR_DEUNIFIER (CHARSET_ATTRIBUTES (charset)))
 332
 333
 334 /* Nonzero iff OBJ is a valid charset symbol.  */
 335 #define CHARSETP(obj) (CHARSET_SYMBOL_HASH_INDEX (obj) >= 0)
 336
 337 /* Check if X is a valid charset symbol.  If not, signal an error.  */
 338 #define CHECK_CHARSET(x)                                        \
 339   do {                                                          \
 340     if (! SYMBOLP (x) || CHARSET_SYMBOL_HASH_INDEX (x) < 0)     \
 341       x = wrong_type_argument (Qcharsetp, (x));                 \
 342   } while (0)
 343
 344
 345 /* Check if X is a valid charset symbol.  If valid, set ID to the id
 346    number of the charset.  Otherwise, signal an error. */
 347 #define CHECK_CHARSET_GET_ID(x, id)                                     \
 348   do {                                                                  \
 349     int idx;                                                            \
 350                                                                         \
 351     if (! SYMBOLP (x) || (idx = CHARSET_SYMBOL_HASH_INDEX (x)) < 0)     \
 352       x = wrong_type_argument (Qcharsetp, (x));                         \
 353     id = XINT (AREF (HASH_VALUE (XHASH_TABLE (Vcharset_hash_table), idx), \
 354                      charset_id));                                      \
 355   } while (0)
 356
 357
 358 /* Check if X is a valid charset symbol.  If valid, set ATTR to the
 359    attr vector of the charset.  Otherwise, signal an error. */
 360 #define CHECK_CHARSET_GET_ATTR(x, attr)                         \
 361   do {                                                                  \
 362     if (!SYMBOLP (x) || NILP (attr = CHARSET_SYMBOL_ATTRIBUTES (x)))    \
 363       x = wrong_type_argument (Qcharsetp, (x));                         \
 364   } while (0)
 365
 366
 367 #define CHECK_CHARSET_GET_CHARSET(x, charset)   \
 368   do {                                          \
 369     int id;                                     \
 370     CHECK_CHARSET_GET_ID (x, id);               \
 371     charset = CHARSET_FROM_ID (id);             \
 372   } while (0)
 373
 374
 375 /* Lookup Vcharset_order_list and return the first charset that
 376    contains the character C.  */
 377 #define CHAR_CHARSET(c)                         \
 378   ((c) < 0x80 ? CHARSET_FROM_ID (charset_ascii) \
 379    : char_charset ((c), Qnil, NULL))
 380
 381 #if 0
 382 /* Char-table of charset-sets.  Each element is a bool vector indexed
 383    by a charset ID.  */
 384 extern Lisp_Object Vchar_charset_set;
 385
 386 /* Charset-bag of character C.  */
 387 #define CHAR_CHARSET_SET(c) \
 388   CHAR_TABLE_REF (Vchar_charset_set, c)
 389
 390 /* Check if two characters C1 and C2 belong to the same charset.  */
 391 #define SAME_CHARSET_P(c1, c2)  \
 392   intersection_p (CHAR_CHARSET_SET (c1), CHAR_CHARSET_SET (c2))
 393
 394 #endif
 395
 396
 397 /* Return a character correponding to the code-point CODE of CHARSET.
 398    Try some optimization before calling decode_char.  */
 399
 400 #define DECODE_CHAR(charset, code)                                      \
 401   ((ASCII_BYTE_P (code) && (charset)->ascii_compatible_p)               \
 402    ? (code)                                                             \
 403    : ((code) < (charset)->min_code || (code) > (charset)->max_code)     \
 404    ? -1                                                                 \
 405    : (charset)->unified_p                                               \
 406    ? decode_char ((charset), (code))                                    \
 407    : (charset)->method == CHARSET_METHOD_OFFSET                         \
 408    ? ((charset)->code_linear_p                                          \
 409       ? (code) - (charset)->min_code + (charset)->code_offset           \
 410       : decode_char ((charset), (code)))                                \
 411    : (charset)->method == CHARSET_METHOD_MAP                            \
 412    ? ((charset)->code_linear_p                                          \
 413       ? XINT (AREF (CHARSET_DECODER (charset),                          \
 414                         (code) - (charset)->min_code))                  \
 415       : decode_char ((charset), (code)))                                \
 416    : decode_char ((charset), (code)))
 417
 418
 419 /* If CHARSET is a simple offset base charset, return it's offset,
 420    otherwise return -1.  */
 421 #define CHARSET_OFFSET(charset)                         \
 422   (((charset)->method == CHARSET_METHOD_OFFSET          \
 423     && (charset)->code_linear_p                         \
 424     && ! (charset)->unified_p)                          \
 425    ? (charset)->code_offset - (charset)->min_code       \
 426    : -1)
 427
 428 extern Lisp_Object charset_work;
 429
 430 /* Return a code point of CHAR in CHARSET.
 431    Try some optimization before calling encode_char.  */
 432
 433 #define ENCODE_CHAR(charset, c)                                          \
 434   ((ASCII_CHAR_P (c) && (charset)->ascii_compatible_p)                   \
 435    ? (c)                                                                 \
 436    : ((charset)->unified_p                                               \
 437       || (charset)->method == CHARSET_METHOD_SUBSET                      \
 438       || (charset)->method == CHARSET_METHOD_SUPERSET)                   \
 439    ? encode_char ((charset), (c))                                        \
 440    : ((c) < (charset)->min_char || (c) > (charset)->max_char)            \
 441    ? (charset)->invalid_code                                             \
 442    : (charset)->method == CHARSET_METHOD_OFFSET                          \
 443    ? ((charset)->code_linear_p                                           \
 444       ? (c) - (charset)->code_offset + (charset)->min_code               \
 445       : encode_char ((charset), (c)))                                    \
 446    : (charset)->method == CHARSET_METHOD_MAP                             \
 447    ? ((charset)->compact_codes_p                                         \
 448       ? (charset_work = CHAR_TABLE_REF (CHARSET_ENCODER (charset), (c)), \
 449          (NILP (charset_work)                                            \
 450           ? (charset)->invalid_code                                      \
 451           : XFASTINT (charset_work)))                                    \
 452       : encode_char ((charset), (c)))                                    \
 453    : encode_char ((charset), (c)))
 454
 455
 456 /* Set to 1 when a charset map is loaded to warn that a buffer text
 457    and a string data may be relocated.  */
 458 extern int charset_map_loaded;
 459
 460
 461 /* Set CHARSET to the charset highest priority of C, CODE to the
 462    code-point of C in CHARSET.  */
 463 #define SPLIT_CHAR(c, charset, code)    \
 464   ((charset) = char_charset ((c), Qnil, &(code)))
 465
 466
 467 #define ISO_MAX_DIMENSION 3
 468 #define ISO_MAX_CHARS 2
 469 #define ISO_MAX_FINAL 0x80      /* only 0x30..0xFF are used */
 470
 471 /* Mapping table from ISO2022's charset (specified by DIMENSION,
 472    CHARS, and FINAL_CHAR) to Emacs' charset ID.  Should be accessed by
 473    macro ISO_CHARSET_TABLE (DIMENSION, CHARS, FINAL_CHAR).  */
 474 extern int iso_charset_table[ISO_MAX_DIMENSION][ISO_MAX_CHARS][ISO_MAX_FINAL];
 475
 476 /* A charset of type iso2022 who has DIMENSION, CHARS, and FINAL
 477    (final character).  */
 478 #define ISO_CHARSET_TABLE(dimension, chars_96, final)   \
 479   iso_charset_table[(dimension) - 1][(chars_96)][(final)]
 480
 481 /* Nonzero iff the charset who has FAST_MAP may contain C.  */
 482 #define CHARSET_FAST_MAP_REF(c, fast_map)               \
 483   ((c) < 0x10000                                        \
 484    ? fast_map[(c) >> 10] & (1 << (((c) >> 7) & 7))      \
 485    : fast_map[((c) >> 15) + 62] & (1 << (((c) >> 12) & 7)))
 486
 487 #define CHARSET_FAST_MAP_SET(c, fast_map)                       \
 488   do {                                                          \
 489     if ((c) < 0x10000)                                          \
 490       (fast_map)[(c) >> 10] |= 1 << (((c) >> 7) & 7);           \
 491     else                                                        \
 492       (fast_map)[((c) >> 15) + 62] |= 1 << (((c) >> 12) & 7);   \
 493   } while (0)
 494
 495
 496
 497 /* 1 iff CHARSET may contain the character C.  */
 498 #define CHAR_CHARSET_P(c, charset)                                       \
 499   ((ASCII_CHAR_P (c) && (charset)->ascii_compatible_p)                   \
 500    || ((CHARSET_UNIFIED_P (charset)                                      \
 501         || (charset)->method == CHARSET_METHOD_SUBSET                    \
 502         || (charset)->method == CHARSET_METHOD_SUPERSET)                 \
 503        ? encode_char ((charset), (c)) != (charset)->invalid_code         \
 504        : (CHARSET_FAST_MAP_REF ((c), (charset)->fast_map)                \
 505           && ((charset)->method == CHARSET_METHOD_OFFSET                 \
 506               ? (c) >= (charset)->min_char && (c) <= (charset)->max_char \
 507               : ((charset)->method == CHARSET_METHOD_MAP                 \
 508                  && (charset)->compact_codes_p)                          \
 509               ? ! NILP (CHAR_TABLE_REF (CHARSET_ENCODER (charset), (c))) \
 510               : encode_char ((charset), (c)) != (charset)->invalid_code))))
 511
 512 \f
 513 /* Special macros for emacs-mule encoding.  */
 514
 515 /* Leading-code followed by extended leading-code.    DIMENSION/COLUMN */
 516 #define EMACS_MULE_LEADING_CODE_PRIVATE_11      0x9A /* 1/1 */
 517 #define EMACS_MULE_LEADING_CODE_PRIVATE_12      0x9B /* 1/2 */
 518 #define EMACS_MULE_LEADING_CODE_PRIVATE_21      0x9C /* 2/2 */
 519 #define EMACS_MULE_LEADING_CODE_PRIVATE_22      0x9D /* 2/2 */
 520
 521 extern struct charset *emacs_mule_charset[256];
 522
 523 \f
 524
 525 extern Lisp_Object Qcharsetp;
 526
 527 extern Lisp_Object Qascii, Qunicode;
 528 extern int charset_ascii, charset_eight_bit;
 529 extern int charset_iso_8859_1;
 530 extern int charset_unicode;
 531 extern int charset_jisx0201_roman;
 532 extern int charset_jisx0208_1978;
 533 extern int charset_jisx0208;
 534
 535 extern int charset_unibyte;
 536
 537 extern struct charset *char_charset P_ ((int, Lisp_Object, unsigned *));
 538 extern Lisp_Object charset_attributes P_ ((int));
 539
 540 extern int decode_char P_ ((struct charset *, unsigned));
 541 extern unsigned encode_char P_ ((struct charset *, int));
 542 extern int string_xstring_p P_ ((Lisp_Object));
 543
 544 extern void map_charset_chars P_ ((void (*) (Lisp_Object, Lisp_Object),
 545                                    Lisp_Object, Lisp_Object,
 546                                    struct charset *, unsigned, unsigned));
 547
 548 EXFUN (Funify_charset, 3);
 549
 550 #endif /* EMACS_CHARSET_H */
 551
 552 /* arch-tag: 3b96db55-4961-481d-ac3e-219f46a2b3aa
 553    (do not change this comment) */