src/charset.h

   1 /* Header for charset handler.
   2    Copyright (C) 2001-2012 Free Software Foundation, Inc.
   3    Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   4      2005, 2006, 2007, 2008, 2009, 2010, 2011
   5      National Institute of Advanced Industrial Science and Technology (AIST)
   6      Registration Number H14PRO021
   7
   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 3 of the License, or
  17 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  26
  27 #ifndef EMACS_CHARSET_H
  28 #define EMACS_CHARSET_H
  29
  30 #include <verify.h>
  31
  32 INLINE_HEADER_BEGIN
  33 #ifndef CHARSET_INLINE
  34 # define CHARSET_INLINE INLINE
  35 #endif
  36
  37 /* Index to arguments of Fdefine_charset_internal.  */
  38
  39 enum define_charset_arg_index
  40   {
  41     charset_arg_name,
  42     charset_arg_dimension,
  43     charset_arg_code_space,
  44     charset_arg_min_code,
  45     charset_arg_max_code,
  46     charset_arg_iso_final,
  47     charset_arg_iso_revision,
  48     charset_arg_emacs_mule_id,
  49     charset_arg_ascii_compatible_p,
  50     charset_arg_supplementary_p,
  51     charset_arg_invalid_code,
  52     charset_arg_code_offset,
  53     charset_arg_map,
  54     charset_arg_subset,
  55     charset_arg_superset,
  56     charset_arg_unify_map,
  57     charset_arg_plist,
  58     charset_arg_max
  59   };
  60
  61
  62 /* Indices to charset attributes vector.  */
  63
  64 enum charset_attr_index
  65   {
  66     /* ID number of the charset.  */
  67     charset_id,
  68
  69     /* Name of the charset (symbol).  */
  70     charset_name,
  71
  72     /* Property list of the charset.  */
  73     charset_plist,
  74
  75     /* If the method of the charset is `MAP', the value is a mapping
  76        vector or a file name that contains mapping vector.  Otherwise,
  77        nil.  */
  78     charset_map,
  79
  80     /* If the method of the charset is `MAP', the value is a vector
  81        that maps code points of the charset to characters.  The vector
  82        is indexed by a character index.  A character index is
  83        calculated from a code point and the code-space table of the
  84        charset.  */
  85     charset_decoder,
  86
  87     /* If the method of the charset is `MAP', the value is a
  88        char-table that maps characters of the charset to code
  89        points.  */
  90     charset_encoder,
  91
  92     /* If the method of the charset is `SUBSET', the value is a vector
  93        that has this form:
  94
  95         [ CHARSET-ID MIN-CODE MAX-CODE OFFSET ]
  96
  97        CHARSET-ID is an ID number of a parent charset.  MIN-CODE and
  98        MAX-CODE specify the range of characters inherited from the
  99        parent.  OFFSET is an integer value to add to a code point of
 100        the parent charset to get the corresponding code point of this
 101        charset.  */
 102     charset_subset,
 103
 104     /* If the method of the charset is `SUPERSET', the value is a list
 105        whose elements have this form:
 106
 107         (CHARSET-ID . OFFSET)
 108
 109        CHARSET-IDs are ID numbers of parent charsets.  OFFSET is an
 110        integer value to add to a code point of the parent charset to
 111        get the corresponding code point of this charset.  */
 112     charset_superset,
 113
 114     /* The value is a mapping vector or a file name that contains the
 115        mapping.  This defines how characters in the charset should be
 116        unified with Unicode.  The value of the member
 117        `charset_deunifier' is created from this information.  */
 118     charset_unify_map,
 119
 120     /* If characters in the charset must be unified Unicode, the value
 121        is a char table that maps a unified Unicode character code to
 122        the non-unified character code in the charset.  */
 123     charset_deunifier,
 124
 125     /* The length of the charset attribute vector.  */
 126     charset_attr_max
 127   };
 128
 129 /* Methods for converting code points and characters of charsets.  */
 130
 131 enum charset_method
 132   {
 133     /* For a charset of this method, a character code is calculated
 134        from a character index (which is calculated from a code point)
 135        simply by adding an offset value.  */
 136     CHARSET_METHOD_OFFSET,
 137
 138     /* For a charset of this method, a decoder vector and an encoder
 139        char-table is used for code point <-> character code
 140        conversion.  */
 141     CHARSET_METHOD_MAP,
 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   ptrdiff_t 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 minimum
 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 the number of characters contained in the first through (N+1)th
 166      dimensions, except that there is no <code_space>[15].
 167      We get `char-index' of a `code-point' from this
 168      information.  */
 169   int code_space[15];
 170
 171   /* If B is a byte of Nth dimension of a code-point, the (N-1)th bit
 172      of code_space_mask[B] is set.  This array is used to quickly
 173      check if a code-point is in a valid range.  */
 174   unsigned char *code_space_mask;
 175
 176   /* 1 if there's no gap in code-points.  */
 177   int code_linear_p;
 178
 179   /* If the charset is treated as 94-chars in ISO-2022, the value is 0.
 180      If the charset is treated as 96-chars in ISO-2022, the value is 1.  */
 181   int iso_chars_96;
 182
 183   /* ISO final byte of the charset: 48..127.  It may be -1 if the
 184      charset doesn't conform to ISO-2022.  */
 185   int iso_final;
 186
 187   /* ISO revision number of the charset.  */
 188   int iso_revision;
 189
 190   /* If the charset is identical to what supported by Emacs 21 and the
 191      priors, the identification number of the charset used in those
 192      version.  Otherwise, -1.  */
 193   int emacs_mule_id;
 194
 195   /* Nonzero if the charset is compatible with ASCII.  */
 196   int ascii_compatible_p;
 197
 198   /* Nonzero if the charset is supplementary.  */
 199   int supplementary_p;
 200
 201   /* Nonzero if all the code points are representable by Lisp_Int.  */
 202   int compact_codes_p;
 203
 204   /* The method for encoding/decoding characters of the charset.  */
 205   enum charset_method method;
 206
 207   /* Minimum and Maximum code points of the charset.  */
 208   unsigned min_code, max_code;
 209
 210   /* Offset value used by macros CODE_POINT_TO_INDEX and
 211       INDEX_TO_CODE_POINT. .  */
 212   unsigned char_index_offset;
 213
 214   /* Minimum and Maximum character codes of the charset.  If the
 215      charset is compatible with ASCII, min_char is a minimum non-ASCII
 216      character of the charset.  If the method of charset is
 217      CHARSET_METHOD_OFFSET, even if the charset is unified, min_char
 218      and max_char doesn't change.  */
 219   int min_char, max_char;
 220
 221   /* The code returned by ENCODE_CHAR if a character is not encodable
 222      by the charset.  */
 223   unsigned invalid_code;
 224
 225   /* If the method of the charset is CHARSET_METHOD_MAP, this is a
 226      table of bits used to quickly and roughly guess if a character
 227      belongs to the charset.
 228
 229      The first 64 elements are 512 bits for characters less than
 230      0x10000.  Each bit corresponds to 128-character block.  The last
 231      126 elements are 1008 bits for the greater characters
 232      (0x10000..0x3FFFFF).  Each bit corresponds to 4096-character
 233      block.
 234
 235      If a bit is 1, at least one character in the corresponding block is
 236      in this charset.  */
 237   unsigned char fast_map[190];
 238
 239   /* Offset value to calculate a character code from code-point, and
 240      visa versa.  */
 241   int code_offset;
 242
 243   int unified_p;
 244 };
 245
 246 /* Hash table of charset symbols vs. the corresponding attribute
 247    vectors.  */
 248 extern Lisp_Object Vcharset_hash_table;
 249
 250 /* Table of struct charset.  */
 251 extern struct charset *charset_table;
 252
 253 #define CHARSET_FROM_ID(id) (charset_table + (id))
 254
 255 extern Lisp_Object Vcharset_ordered_list;
 256 extern Lisp_Object Vcharset_non_preferred_head;
 257
 258 /* Incremented everytime we change the priority of charsets.  */
 259 extern unsigned short charset_ordered_list_tick;
 260
 261 extern Lisp_Object Viso_2022_charset_list;
 262 extern Lisp_Object Vemacs_mule_charset_list;
 263
 264 extern int emacs_mule_charset[256];
 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 CHARSET_INLINE void
 334 set_charset_attr (struct charset *charset, enum charset_attr_index idx,
 335                   Lisp_Object val)
 336 {
 337   ASET (CHARSET_ATTRIBUTES (charset), idx, val);
 338 }
 339
 340
 341 /* Nonzero if OBJ is a valid charset symbol.  */
 342 #define CHARSETP(obj) (CHARSET_SYMBOL_HASH_INDEX (obj) >= 0)
 343
 344 /* Check if X is a valid charset symbol.  If not, signal an error.  */
 345 #define CHECK_CHARSET(x)                                        \
 346   do {                                                          \
 347     if (! SYMBOLP (x) || CHARSET_SYMBOL_HASH_INDEX (x) < 0)     \
 348       wrong_type_argument (Qcharsetp, (x));                     \
 349   } while (0)
 350
 351
 352 /* Check if X is a valid charset symbol.  If valid, set ID to the id
 353    number of the charset.  Otherwise, signal an error. */
 354 #define CHECK_CHARSET_GET_ID(x, id)                                     \
 355   do {                                                                  \
 356     ptrdiff_t idx;                                                      \
 357                                                                         \
 358     if (! SYMBOLP (x) || (idx = CHARSET_SYMBOL_HASH_INDEX (x)) < 0)     \
 359       wrong_type_argument (Qcharsetp, (x));                             \
 360     id = XINT (AREF (HASH_VALUE (XHASH_TABLE (Vcharset_hash_table), idx), \
 361                      charset_id));                                      \
 362   } while (0)
 363
 364
 365 /* Check if X is a valid charset symbol.  If valid, set ATTR to the
 366    attr vector of the charset.  Otherwise, signal an error. */
 367 #define CHECK_CHARSET_GET_ATTR(x, attr)                         \
 368   do {                                                                  \
 369     if (!SYMBOLP (x) || NILP (attr = CHARSET_SYMBOL_ATTRIBUTES (x)))    \
 370       wrong_type_argument (Qcharsetp, (x));                             \
 371   } while (0)
 372
 373
 374 #define CHECK_CHARSET_GET_CHARSET(x, charset)   \
 375   do {                                          \
 376     int csid;                                   \
 377     CHECK_CHARSET_GET_ID (x, csid);             \
 378     charset = CHARSET_FROM_ID (csid);           \
 379   } while (0)
 380
 381
 382 /* Lookup Vcharset_ordered_list and return the first charset that
 383    contains the character C.  */
 384 #define CHAR_CHARSET(c)                         \
 385   ((c) < 0x80 ? CHARSET_FROM_ID (charset_ascii) \
 386    : char_charset ((c), Qnil, NULL))
 387
 388 #if 0
 389 /* Char-table of charset-sets.  Each element is a bool vector indexed
 390    by a charset ID.  */
 391 extern Lisp_Object Vchar_charset_set;
 392
 393 /* Charset-bag of character C.  */
 394 #define CHAR_CHARSET_SET(c) \
 395   CHAR_TABLE_REF (Vchar_charset_set, c)
 396
 397 /* Check if two characters C1 and C2 belong to the same charset.  */
 398 #define SAME_CHARSET_P(c1, c2)  \
 399   intersection_p (CHAR_CHARSET_SET (c1), CHAR_CHARSET_SET (c2))
 400
 401 #endif
 402
 403
 404 /* Return a character corresponding to the code-point CODE of CHARSET.
 405    Try some optimization before calling decode_char.  */
 406
 407 #define DECODE_CHAR(charset, code)                                      \
 408   ((ASCII_BYTE_P (code) && (charset)->ascii_compatible_p)               \
 409    ? (code)                                                             \
 410    : ((code) < (charset)->min_code || (code) > (charset)->max_code)     \
 411    ? -1                                                                 \
 412    : (charset)->unified_p                                               \
 413    ? decode_char ((charset), (code))                                    \
 414    : (charset)->method == CHARSET_METHOD_OFFSET                         \
 415    ? ((charset)->code_linear_p                                          \
 416       ? (int) ((code) - (charset)->min_code) + (charset)->code_offset   \
 417       : decode_char ((charset), (code)))                                \
 418    : (charset)->method == CHARSET_METHOD_MAP                            \
 419    ? (((charset)->code_linear_p                                         \
 420        && VECTORP (CHARSET_DECODER (charset)))                          \
 421       ? XINT (AREF (CHARSET_DECODER (charset),                          \
 422                     (code) - (charset)->min_code))                      \
 423       : decode_char ((charset), (code)))                                \
 424    : decode_char ((charset), (code)))
 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   (verify_expr                                                          \
 433    (sizeof (c) <= sizeof (int),                                         \
 434     (ASCII_CHAR_P (c) && (charset)->ascii_compatible_p                  \
 435      ? (unsigned) (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         ? (unsigned) ((c) - (charset)->code_offset) + (charset)->min_code \
 445         : encode_char (charset, c))                                     \
 446      : (charset)->method == CHARSET_METHOD_MAP                          \
 447      ? (((charset)->compact_codes_p                                     \
 448          && CHAR_TABLE_P (CHARSET_ENCODER (charset)))                   \
 449         ? (charset_work = CHAR_TABLE_REF (CHARSET_ENCODER (charset), c), \
 450            (NILP (charset_work)                                         \
 451             ? (charset)->invalid_code                                   \
 452             : (unsigned) XFASTINT (charset_work)))                      \
 453         : encode_char (charset, c))                                     \
 454      : encode_char (charset, c))))
 455
 456
 457 /* Set to 1 when a charset map is loaded to warn that a buffer text
 458    and a string data may be relocated.  */
 459 extern int charset_map_loaded;
 460
 461
 462 /* Set CHARSET to the charset highest priority of C, CODE to the
 463    code-point of C in CHARSET.  */
 464 #define SPLIT_CHAR(c, charset, code)    \
 465   ((charset) = char_charset ((c), Qnil, &(code)))
 466
 467
 468 #define ISO_MAX_DIMENSION 3
 469 #define ISO_MAX_CHARS 2
 470 #define ISO_MAX_FINAL 0x80      /* only 0x30..0xFF are used */
 471
 472 /* Mapping table from ISO2022's charset (specified by DIMENSION,
 473    CHARS, and FINAL_CHAR) to Emacs' charset ID.  Should be accessed by
 474    macro ISO_CHARSET_TABLE (DIMENSION, CHARS, FINAL_CHAR).  */
 475 extern int iso_charset_table[ISO_MAX_DIMENSION][ISO_MAX_CHARS][ISO_MAX_FINAL];
 476
 477 /* A charset of type iso2022 who has DIMENSION, CHARS, and FINAL
 478    (final character).  */
 479 #define ISO_CHARSET_TABLE(dimension, chars_96, final)   \
 480   iso_charset_table[(dimension) - 1][(chars_96)][(final)]
 481
 482 /* Nonzero if the charset who has FAST_MAP may contain C.  */
 483 #define CHARSET_FAST_MAP_REF(c, fast_map)               \
 484   ((c) < 0x10000                                        \
 485    ? fast_map[(c) >> 10] & (1 << (((c) >> 7) & 7))      \
 486    : fast_map[((c) >> 15) + 62] & (1 << (((c) >> 12) & 7)))
 487
 488 #define CHARSET_FAST_MAP_SET(c, fast_map)                       \
 489   do {                                                          \
 490     if ((c) < 0x10000)                                          \
 491       (fast_map)[(c) >> 10] |= 1 << (((c) >> 7) & 7);           \
 492     else                                                        \
 493       (fast_map)[((c) >> 15) + 62] |= 1 << (((c) >> 12) & 7);   \
 494   } while (0)
 495
 496
 497
 498 /* 1 if CHARSET may contain the character C.  */
 499 #define CHAR_CHARSET_P(c, charset)                                       \
 500   ((ASCII_CHAR_P (c) && (charset)->ascii_compatible_p)                   \
 501    || ((CHARSET_UNIFIED_P (charset)                                      \
 502         || (charset)->method == CHARSET_METHOD_SUBSET                    \
 503         || (charset)->method == CHARSET_METHOD_SUPERSET)                 \
 504        ? encode_char ((charset), (c)) != (charset)->invalid_code         \
 505        : (CHARSET_FAST_MAP_REF ((c), (charset)->fast_map)                \
 506           && ((charset)->method == CHARSET_METHOD_OFFSET                 \
 507               ? (c) >= (charset)->min_char && (c) <= (charset)->max_char \
 508               : ((charset)->method == CHARSET_METHOD_MAP                 \
 509                  && (charset)->compact_codes_p                           \
 510                  && CHAR_TABLE_P (CHARSET_ENCODER (charset)))            \
 511               ? ! NILP (CHAR_TABLE_REF (CHARSET_ENCODER (charset), (c))) \
 512               : encode_char ((charset), (c)) != (charset)->invalid_code))))
 513
 514 \f
 515 /* Special macros for emacs-mule encoding.  */
 516
 517 /* Leading-code followed by extended leading-code.    DIMENSION/COLUMN */
 518 #define EMACS_MULE_LEADING_CODE_PRIVATE_11      0x9A /* 1/1 */
 519 #define EMACS_MULE_LEADING_CODE_PRIVATE_12      0x9B /* 1/2 */
 520 #define EMACS_MULE_LEADING_CODE_PRIVATE_21      0x9C /* 2/2 */
 521 #define EMACS_MULE_LEADING_CODE_PRIVATE_22      0x9D /* 2/2 */
 522
 523 \f
 524
 525 extern Lisp_Object Qcharsetp;
 526
 527 extern Lisp_Object Qascii;
 528 extern int charset_ascii, charset_eight_bit;
 529 extern int charset_unicode;
 530 extern int charset_jisx0201_roman;
 531 extern int charset_jisx0208_1978;
 532 extern int charset_jisx0208;
 533 extern int charset_ksc5601;
 534
 535 extern int charset_unibyte;
 536
 537 extern struct charset *char_charset (int, Lisp_Object, unsigned *);
 538 extern Lisp_Object charset_attributes (int);
 539
 540 extern int maybe_unify_char (int, Lisp_Object);
 541 extern int decode_char (struct charset *, unsigned);
 542 extern unsigned encode_char (struct charset *, int);
 543 extern int string_xstring_p (Lisp_Object);
 544
 545 extern void map_charset_chars (void (*) (Lisp_Object, Lisp_Object),
 546                                Lisp_Object, Lisp_Object,
 547                                struct charset *, unsigned, unsigned);
 548
 549 INLINE_HEADER_END
 550
 551 #endif /* EMACS_CHARSET_H */