src/charset.h

   1 /* Header for charset handler.
   2    Copyright (C) 2001-2013 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
  34 /* Index to arguments of Fdefine_charset_internal.  */
  35
  36 enum define_charset_arg_index
  37   {
  38     charset_arg_name,
  39     charset_arg_dimension,
  40     charset_arg_code_space,
  41     charset_arg_min_code,
  42     charset_arg_max_code,
  43     charset_arg_iso_final,
  44     charset_arg_iso_revision,
  45     charset_arg_emacs_mule_id,
  46     charset_arg_ascii_compatible_p,
  47     charset_arg_supplementary_p,
  48     charset_arg_invalid_code,
  49     charset_arg_code_offset,
  50     charset_arg_map,
  51     charset_arg_subset,
  52     charset_arg_superset,
  53     charset_arg_unify_map,
  54     charset_arg_plist,
  55     charset_arg_max
  56   };
  57
  58
  59 /* Indices to charset attributes vector.  */
  60
  61 enum charset_attr_index
  62   {
  63     /* ID number of the charset.  */
  64     charset_id,
  65
  66     /* Name of the charset (symbol).  */
  67     charset_name,
  68
  69     /* Property list of the charset.  */
  70     charset_plist,
  71
  72     /* If the method of the charset is `MAP', the value is a mapping
  73        vector or a file name that contains mapping vector.  Otherwise,
  74        nil.  */
  75     charset_map,
  76
  77     /* If the method of the charset is `MAP', the value is a vector
  78        that maps code points of the charset to characters.  The vector
  79        is indexed by a character index.  A character index is
  80        calculated from a code point and the code-space table of the
  81        charset.  */
  82     charset_decoder,
  83
  84     /* If the method of the charset is `MAP', the value is a
  85        char-table that maps characters of the charset to code
  86        points.  */
  87     charset_encoder,
  88
  89     /* If the method of the charset is `SUBSET', the value is a vector
  90        that has this form:
  91
  92         [ CHARSET-ID MIN-CODE MAX-CODE OFFSET ]
  93
  94        CHARSET-ID is an ID number of a parent charset.  MIN-CODE and
  95        MAX-CODE specify the range of characters inherited from the
  96        parent.  OFFSET is an integer value to add to a code point of
  97        the parent charset to get the corresponding code point of this
  98        charset.  */
  99     charset_subset,
 100
 101     /* If the method of the charset is `SUPERSET', the value is a list
 102        whose elements have this form:
 103
 104         (CHARSET-ID . OFFSET)
 105
 106        CHARSET-IDs are ID numbers of parent charsets.  OFFSET is an
 107        integer value to add to a code point of the parent charset to
 108        get the corresponding code point of this charset.  */
 109     charset_superset,
 110
 111     /* The value is a mapping vector or a file name that contains the
 112        mapping.  This defines how characters in the charset should be
 113        unified with Unicode.  The value of the member
 114        `charset_deunifier' is created from this information.  */
 115     charset_unify_map,
 116
 117     /* If characters in the charset must be unified Unicode, the value
 118        is a char table that maps a unified Unicode character code to
 119        the non-unified character code in the charset.  */
 120     charset_deunifier,
 121
 122     /* The length of the charset attribute vector.  */
 123     charset_attr_max
 124   };
 125
 126 /* Methods for converting code points and characters of charsets.  */
 127
 128 enum charset_method
 129   {
 130     /* For a charset of this method, a character code is calculated
 131        from a character index (which is calculated from a code point)
 132        simply by adding an offset value.  */
 133     CHARSET_METHOD_OFFSET,
 134
 135     /* For a charset of this method, a decoder vector and an encoder
 136        char-table is used for code point <-> character code
 137        conversion.  */
 138     CHARSET_METHOD_MAP,
 139
 140     /* A charset of this method is a subset of another charset.  */
 141     CHARSET_METHOD_SUBSET,
 142
 143     /* A charset of this method is a superset of other charsets.  */
 144     CHARSET_METHOD_SUPERSET
 145   };
 146
 147 struct charset
 148 {
 149   /* Index to charset_table.  */
 150   int id;
 151
 152   /* Index to Vcharset_hash_table.  */
 153   ptrdiff_t hash_index;
 154
 155   /* Dimension of the charset: 1, 2, 3, or 4.  */
 156   int dimension;
 157
 158   /* Byte code range of each dimension.  <code_space>[4N] is a minimum
 159      byte code of the (N+1)th dimension, <code_space>[4N+1] is a
 160      maximum byte code of the (N+1)th dimension, <code_space>[4N+2] is
 161      (<code_space>[4N+1] - <code_space>[4N] + 1), <code_space>[4N+3]
 162      is the number of characters contained in the first through (N+1)th
 163      dimensions, except that there is no <code_space>[15].
 164      We get `char-index' of a `code-point' from this
 165      information.  */
 166   int code_space[15];
 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   /* True if there's no gap in code-points.  */
 174   unsigned code_linear_p : 1;
 175
 176   /* True if the charset is treated as 96 chars in ISO-2022
 177      as opposed to 94 chars.  */
 178   unsigned iso_chars_96 : 1;
 179
 180   /* True if the charset is compatible with ASCII.  */
 181   unsigned ascii_compatible_p : 1;
 182
 183   /* True if the charset is supplementary.  */
 184   unsigned supplementary_p : 1;
 185
 186   /* True if all the code points are representable by Lisp_Int.  */
 187   unsigned compact_codes_p : 1;
 188
 189   /* True if the charset is unified with Unicode.  */
 190   unsigned unified_p : 1;
 191
 192   /* ISO final byte of the charset: 48..127.  It may be -1 if the
 193      charset doesn't conform to ISO-2022.  */
 194   int iso_final;
 195
 196   /* ISO revision number of the charset.  */
 197   int iso_revision;
 198
 199   /* If the charset is identical to what supported by Emacs 21 and the
 200      priors, the identification number of the charset used in those
 201      version.  Otherwise, -1.  */
 202   int emacs_mule_id;
 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
 244 /* Hash table of charset symbols vs. the corresponding 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 extern Lisp_Object Vcharset_non_preferred_head;
 255
 256 /* Incremented everytime we change the priority of charsets.  */
 257 extern unsigned short charset_ordered_list_tick;
 258
 259 extern Lisp_Object Viso_2022_charset_list;
 260 extern Lisp_Object Vemacs_mule_charset_list;
 261
 262 extern int emacs_mule_charset[256];
 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 INLINE void
 332 set_charset_attr (struct charset *charset, enum charset_attr_index idx,
 333                   Lisp_Object val)
 334 {
 335   ASET (CHARSET_ATTRIBUTES (charset), idx, val);
 336 }
 337
 338
 339 /* Nonzero if OBJ is a valid charset symbol.  */
 340 #define CHARSETP(obj) (CHARSET_SYMBOL_HASH_INDEX (obj) >= 0)
 341
 342 /* Check if X is a valid charset symbol.  If not, signal an error.  */
 343 #define CHECK_CHARSET(x)                                        \
 344   do {                                                          \
 345     if (! SYMBOLP (x) || CHARSET_SYMBOL_HASH_INDEX (x) < 0)     \
 346       wrong_type_argument (Qcharsetp, (x));                     \
 347   } while (0)
 348
 349
 350 /* Check if X is a valid charset symbol.  If valid, set ID to the id
 351    number of the charset.  Otherwise, signal an error. */
 352 #define CHECK_CHARSET_GET_ID(x, id)                                     \
 353   do {                                                                  \
 354     ptrdiff_t idx;                                                      \
 355                                                                         \
 356     if (! SYMBOLP (x) || (idx = CHARSET_SYMBOL_HASH_INDEX (x)) < 0)     \
 357       wrong_type_argument (Qcharsetp, (x));                             \
 358     id = XINT (AREF (HASH_VALUE (XHASH_TABLE (Vcharset_hash_table), idx), \
 359                      charset_id));                                      \
 360   } while (0)
 361
 362
 363 /* Check if X is a valid charset symbol.  If valid, set ATTR to the
 364    attr vector of the charset.  Otherwise, signal an error. */
 365 #define CHECK_CHARSET_GET_ATTR(x, attr)                         \
 366   do {                                                                  \
 367     if (!SYMBOLP (x) || NILP (attr = CHARSET_SYMBOL_ATTRIBUTES (x)))    \
 368       wrong_type_argument (Qcharsetp, (x));                             \
 369   } while (0)
 370
 371
 372 #define CHECK_CHARSET_GET_CHARSET(x, charset)   \
 373   do {                                          \
 374     int csid;                                   \
 375     CHECK_CHARSET_GET_ID (x, csid);             \
 376     charset = CHARSET_FROM_ID (csid);           \
 377   } while (0)
 378
 379
 380 /* Lookup Vcharset_ordered_list and return the first charset that
 381    contains the character C.  */
 382 #define CHAR_CHARSET(c)                         \
 383   ((c) < 0x80 ? CHARSET_FROM_ID (charset_ascii) \
 384    : char_charset ((c), Qnil, NULL))
 385
 386 #if 0
 387 /* Char-table of charset-sets.  Each element is a bool vector indexed
 388    by a charset ID.  */
 389 extern Lisp_Object Vchar_charset_set;
 390
 391 /* Charset-bag of character C.  */
 392 #define CHAR_CHARSET_SET(c) \
 393   CHAR_TABLE_REF (Vchar_charset_set, c)
 394
 395 /* Check if two characters C1 and C2 belong to the same charset.  */
 396 #define SAME_CHARSET_P(c1, c2)  \
 397   intersection_p (CHAR_CHARSET_SET (c1), CHAR_CHARSET_SET (c2))
 398
 399 #endif
 400
 401
 402 /* Return a character corresponding to the code-point CODE of CHARSET.
 403    Try some optimization before calling decode_char.  */
 404
 405 #define DECODE_CHAR(charset, code)                                      \
 406   ((ASCII_BYTE_P (code) && (charset)->ascii_compatible_p)               \
 407    ? (code)                                                             \
 408    : ((code) < (charset)->min_code || (code) > (charset)->max_code)     \
 409    ? -1                                                                 \
 410    : (charset)->unified_p                                               \
 411    ? decode_char ((charset), (code))                                    \
 412    : (charset)->method == CHARSET_METHOD_OFFSET                         \
 413    ? ((charset)->code_linear_p                                          \
 414       ? (int) ((code) - (charset)->min_code) + (charset)->code_offset   \
 415       : decode_char ((charset), (code)))                                \
 416    : (charset)->method == CHARSET_METHOD_MAP                            \
 417    ? (((charset)->code_linear_p                                         \
 418        && VECTORP (CHARSET_DECODER (charset)))                          \
 419       ? XINT (AREF (CHARSET_DECODER (charset),                          \
 420                     (code) - (charset)->min_code))                      \
 421       : decode_char ((charset), (code)))                                \
 422    : decode_char ((charset), (code)))
 423
 424 extern Lisp_Object charset_work;
 425
 426 /* Return a code point of CHAR in CHARSET.
 427    Try some optimization before calling encode_char.  */
 428
 429 #define ENCODE_CHAR(charset, c)                                         \
 430   (verify_expr                                                          \
 431    (sizeof (c) <= sizeof (int),                                         \
 432     (ASCII_CHAR_P (c) && (charset)->ascii_compatible_p                  \
 433      ? (unsigned) (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         ? (unsigned) ((c) - (charset)->code_offset) + (charset)->min_code \
 443         : encode_char (charset, c))                                     \
 444      : (charset)->method == CHARSET_METHOD_MAP                          \
 445      ? (((charset)->compact_codes_p                                     \
 446          && CHAR_TABLE_P (CHARSET_ENCODER (charset)))                   \
 447         ? (charset_work = CHAR_TABLE_REF (CHARSET_ENCODER (charset), c), \
 448            (NILP (charset_work)                                         \
 449             ? (charset)->invalid_code                                   \
 450             : (unsigned) 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 bool 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_96, 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 if 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 /* True if 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                  && CHAR_TABLE_P (CHARSET_ENCODER (charset)))            \
 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 \f
 522
 523 extern Lisp_Object Qcharsetp;
 524
 525 extern Lisp_Object Qascii;
 526 extern int charset_ascii, charset_eight_bit;
 527 extern int charset_unicode;
 528 extern int charset_jisx0201_roman;
 529 extern int charset_jisx0208_1978;
 530 extern int charset_jisx0208;
 531 extern int charset_ksc5601;
 532
 533 extern int charset_unibyte;
 534
 535 extern struct charset *char_charset (int, Lisp_Object, unsigned *);
 536 extern Lisp_Object charset_attributes (int);
 537
 538 extern int decode_char (struct charset *, unsigned);
 539 extern unsigned encode_char (struct charset *, int);
 540 extern int string_xstring_p (Lisp_Object);
 541
 542 extern void map_charset_chars (void (*) (Lisp_Object, Lisp_Object),
 543                                Lisp_Object, Lisp_Object,
 544                                struct charset *, unsigned, unsigned);
 545
 546 INLINE_HEADER_END
 547
 548 #endif /* EMACS_CHARSET_H */