| | 1 | /* Header for multibyte character handler. |
| | 2 | Copyright (C) 1995, 1997, 1998 Electrotechnical Laboratory, JAPAN. |
| | 3 | Licensed to the Free Software Foundation. |
| | 4 | |
| | 5 | This file is part of GNU Emacs. |
| | 6 | |
| | 7 | GNU Emacs is free software; you can redistribute it and/or modify |
| | 8 | it under the terms of the GNU General Public License as published by |
| | 9 | the Free Software Foundation; either version 2, or (at your option) |
| | 10 | any later version. |
| | 11 | |
| | 12 | GNU Emacs is distributed in the hope that it will be useful, |
| | 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| | 15 | GNU General Public License for more details. |
| | 16 | |
| | 17 | You should have received a copy of the GNU General Public License |
| | 18 | along with GNU Emacs; see the file COPYING. If not, write to |
| | 19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| | 20 | Boston, MA 02111-1307, USA. */ |
| | 21 | |
| | 22 | #ifndef EMACS_CHARSET_H |
| | 23 | #define EMACS_CHARSET_H |
| | 24 | |
| | 25 | /* #define BYTE_COMBINING_DEBUG */ |
| | 26 | |
| | 27 | /*** GENERAL NOTE on CHARACTER SET (CHARSET) *** |
| | 28 | |
| | 29 | A character set ("charset" hereafter) is a meaningful collection |
| | 30 | (i.e. language, culture, functionality, etc) of characters. Emacs |
| | 31 | handles multiple charsets at once. Each charset corresponds to one |
| | 32 | of ISO charsets. Emacs identifies a charset by a unique |
| | 33 | identification number, whereas ISO identifies a charset by a triplet |
| | 34 | of DIMENSION, CHARS and FINAL-CHAR. So, hereafter, just saying |
| | 35 | "charset" means an identification number (integer value). |
| | 36 | |
| | 37 | The value range of charset is 0x00, 0x81..0xFE. There are four |
| | 38 | kinds of charset depending on DIMENSION (1 or 2) and CHARS (94 or |
| | 39 | 96). For instance, a charset of DIMENSION2_CHARS94 contains 94x94 |
| | 40 | characters. |
| | 41 | |
| | 42 | Within Emacs Lisp, a charset is treated as a symbol which has a |
| | 43 | property `charset'. The property value is a vector containing |
| | 44 | various information about the charset. For readability of C codes, |
| | 45 | we use the following convention for C variable names: |
| | 46 | charset_symbol: Emacs Lisp symbol of a charset |
| | 47 | charset_id: Emacs Lisp integer of an identification number of a charset |
| | 48 | charset: C integer of an identification number of a charset |
| | 49 | |
| | 50 | Each charset (except for ascii) is assigned a base leading-code |
| | 51 | (range 0x80..0x9E). In addition, a charset of greater than 0xA0 |
| | 52 | (whose base leading-code is 0x9A..0x9D) is assigned an extended |
| | 53 | leading-code (range 0xA0..0xFE). In this case, each base |
| | 54 | leading-code specify the allowable range of extended leading-code as |
| | 55 | shown in the table below. A leading-code is used to represent a |
| | 56 | character in Emacs' buffer and string. |
| | 57 | |
| | 58 | We call a charset which has extended leading-code as "private |
| | 59 | charset" because those are mainly for a charset which is not yet |
| | 60 | registered by ISO. On the contrary, we call a charset which does |
| | 61 | not have extended leading-code as "official charset". |
| | 62 | |
| | 63 | --------------------------------------------------------------------------- |
| | 64 | charset dimension base leading-code extended leading-code |
| | 65 | --------------------------------------------------------------------------- |
| | 66 | 0x00 official dim1 -- none -- -- none -- |
| | 67 | (ASCII) |
| | 68 | 0x01..0x7F --never used-- |
| | 69 | 0x80 official dim1 -- none -- -- none -- |
| | 70 | (eight-bit-graphic) |
| | 71 | 0x81..0x8F official dim1 same as charset -- none -- |
| | 72 | 0x90..0x99 official dim2 same as charset -- none -- |
| | 73 | 0x9A..0x9D --never used-- |
| | 74 | 0x9E official dim1 same as charset -- none -- |
| | 75 | (eight-bit-control) |
| | 76 | 0x9F --never used-- |
| | 77 | 0xA0..0xDF private dim1 0x9A same as charset |
| | 78 | of 1-column width |
| | 79 | 0xE0..0xEF private dim1 0x9B same as charset |
| | 80 | of 2-column width |
| | 81 | 0xF0..0xF4 private dim2 0x9C same as charset |
| | 82 | of 1-column width |
| | 83 | 0xF5..0xFE private dim2 0x9D same as charset |
| | 84 | of 2-column width |
| | 85 | 0xFF --never used-- |
| | 86 | --------------------------------------------------------------------------- |
| | 87 | |
| | 88 | */ |
| | 89 | |
| | 90 | /* Definition of special leading-codes. */ |
| | 91 | /* Leading-code followed by extended leading-code. */ |
| | 92 | #define LEADING_CODE_PRIVATE_11 0x9A /* for private DIMENSION1 of 1-column */ |
| | 93 | #define LEADING_CODE_PRIVATE_12 0x9B /* for private DIMENSION1 of 2-column */ |
| | 94 | #define LEADING_CODE_PRIVATE_21 0x9C /* for private DIMENSION2 of 1-column */ |
| | 95 | #define LEADING_CODE_PRIVATE_22 0x9D /* for private DIMENSION2 of 2-column */ |
| | 96 | |
| | 97 | #define LEADING_CODE_8_BIT_CONTROL 0x9E /* for `eight-bit-control' */ |
| | 98 | |
| | 99 | /* Extended leading-code. */ |
| | 100 | /* Start of each extended leading-codes. */ |
| | 101 | #define LEADING_CODE_EXT_11 0xA0 /* follows LEADING_CODE_PRIVATE_11 */ |
| | 102 | #define LEADING_CODE_EXT_12 0xE0 /* follows LEADING_CODE_PRIVATE_12 */ |
| | 103 | #define LEADING_CODE_EXT_21 0xF0 /* follows LEADING_CODE_PRIVATE_21 */ |
| | 104 | #define LEADING_CODE_EXT_22 0xF5 /* follows LEADING_CODE_PRIVATE_22 */ |
| | 105 | /* Maximum value of extended leading-codes. */ |
| | 106 | #define LEADING_CODE_EXT_MAX 0xFE |
| | 107 | |
| | 108 | /* Definition of minimum/maximum charset of each DIMENSION. */ |
| | 109 | #define MIN_CHARSET_OFFICIAL_DIMENSION1 0x81 |
| | 110 | #define MAX_CHARSET_OFFICIAL_DIMENSION1 0x8F |
| | 111 | #define MIN_CHARSET_OFFICIAL_DIMENSION2 0x90 |
| | 112 | #define MAX_CHARSET_OFFICIAL_DIMENSION2 0x99 |
| | 113 | #define MIN_CHARSET_PRIVATE_DIMENSION1 LEADING_CODE_EXT_11 |
| | 114 | #define MIN_CHARSET_PRIVATE_DIMENSION2 LEADING_CODE_EXT_21 |
| | 115 | |
| | 116 | /* Maximum value of overall charset identification number. */ |
| | 117 | #define MAX_CHARSET 0xFE |
| | 118 | |
| | 119 | /* Definition of special charsets. */ |
| | 120 | #define CHARSET_ASCII 0 /* 0x00..0x7F */ |
| | 121 | #define CHARSET_8_BIT_CONTROL 0x9E /* 0x80..0x9F */ |
| | 122 | #define CHARSET_8_BIT_GRAPHIC 0x80 /* 0xA0..0xFF */ |
| | 123 | |
| | 124 | extern int charset_latin_iso8859_1; /* ISO8859-1 (Latin-1) */ |
| | 125 | extern int charset_jisx0208_1978; /* JISX0208.1978 (Japanese Kanji old set) */ |
| | 126 | extern int charset_jisx0208; /* JISX0208.1983 (Japanese Kanji) */ |
| | 127 | extern int charset_katakana_jisx0201; /* JISX0201.Kana (Japanese Katakana) */ |
| | 128 | extern int charset_latin_jisx0201; /* JISX0201.Roman (Japanese Roman) */ |
| | 129 | extern int charset_big5_1; /* Big5 Level 1 (Chinese Traditional) */ |
| | 130 | extern int charset_big5_2; /* Big5 Level 2 (Chinese Traditional) */ |
| | 131 | |
| | 132 | /* Check if CH is an ASCII character or a base leading-code. |
| | 133 | Nowadays, any byte can be the first byte of a character in a |
| | 134 | multibyte buffer/string. So this macro name is not appropriate. */ |
| | 135 | #define CHAR_HEAD_P(ch) ((unsigned char) (ch) < 0xA0) |
| | 136 | |
| | 137 | /*** GENERAL NOTE on CHARACTER REPRESENTATION *** |
| | 138 | |
| | 139 | At first, the term "character" or "char" is used for a multilingual |
| | 140 | character (of course, including ASCII character), not for a byte in |
| | 141 | computer memory. We use the term "code" or "byte" for the latter |
| | 142 | case. |
| | 143 | |
| | 144 | A character is identified by charset and one or two POSITION-CODEs. |
| | 145 | POSITION-CODE is the position of the character in the charset. A |
| | 146 | character of DIMENSION1 charset has one POSITION-CODE: POSITION-CODE-1. |
| | 147 | A character of DIMENSION2 charset has two POSITION-CODE: |
| | 148 | POSITION-CODE-1 and POSITION-CODE-2. The code range of |
| | 149 | POSITION-CODE is 0x20..0x7F. |
| | 150 | |
| | 151 | Emacs has two kinds of representation of a character: multi-byte |
| | 152 | form (for buffer and string) and single-word form (for character |
| | 153 | object in Emacs Lisp). The latter is called "character code" here |
| | 154 | after. Both representations encode the information of charset and |
| | 155 | POSITION-CODE but in a different way (for instance, MSB of |
| | 156 | POSITION-CODE is set in multi-byte form). |
| | 157 | |
| | 158 | For details of multi-byte form, see the section "2. Emacs internal |
| | 159 | format handlers" of `coding.c'. |
| | 160 | |
| | 161 | Emacs uses 19 bits for a character code. The bits are divided into |
| | 162 | 3 fields: FIELD1(5bits):FIELD2(7bits):FIELD3(7bits). |
| | 163 | |
| | 164 | A character code of DIMENSION1 character uses FIELD2 to hold charset |
| | 165 | and FIELD3 to hold POSITION-CODE-1. A character code of DIMENSION2 |
| | 166 | character uses FIELD1 to hold charset, FIELD2 and FIELD3 to hold |
| | 167 | POSITION-CODE-1 and POSITION-CODE-2 respectively. |
| | 168 | |
| | 169 | More precisely... |
| | 170 | |
| | 171 | FIELD2 of DIMENSION1 character (except for ascii, eight-bit-control, |
| | 172 | and eight-bit-graphic) is "charset - 0x70". This is to make all |
| | 173 | character codes except for ASCII and 8-bit codes greater than 256. |
| | 174 | So, the range of FIELD2 of DIMENSION1 character is 0, 1, or |
| | 175 | 0x11..0x7F. |
| | 176 | |
| | 177 | FIELD1 of DIMENSION2 character is "charset - 0x8F" for official |
| | 178 | charset and "charset - 0xE0" for private charset. So, the range of |
| | 179 | FIELD1 of DIMENSION2 character is 0x01..0x1E. |
| | 180 | |
| | 181 | ----------------------------------------------------------------------------- |
| | 182 | charset FIELD1 (5-bit) FIELD2 (7-bit) FIELD3 (7-bit) |
| | 183 | ----------------------------------------------------------------------------- |
| | 184 | ascii 0 0 0x00..0x7F |
| | 185 | eight-bit-control 0 1 0x00..0x1F |
| | 186 | eight-bit-graphic 0 1 0x20..0x7F |
| | 187 | DIMENSION1 0 charset - 0x70 POSITION-CODE-1 |
| | 188 | DIMENSION2(o) charset - 0x8F POSITION-CODE-1 POSITION-CODE-2 |
| | 189 | DIMENSION2(p) charset - 0xE0 POSITION-CODE-1 POSITION-CODE-2 |
| | 190 | ----------------------------------------------------------------------------- |
| | 191 | "(o)": official, "(p)": private |
| | 192 | ----------------------------------------------------------------------------- |
| | 193 | */ |
| | 194 | |
| | 195 | /* Masks of each field of character code. */ |
| | 196 | #define CHAR_FIELD1_MASK (0x1F << 14) |
| | 197 | #define CHAR_FIELD2_MASK (0x7F << 7) |
| | 198 | #define CHAR_FIELD3_MASK 0x7F |
| | 199 | |
| | 200 | /* Macros to access each field of character C. */ |
| | 201 | #define CHAR_FIELD1(c) (((c) & CHAR_FIELD1_MASK) >> 14) |
| | 202 | #define CHAR_FIELD2(c) (((c) & CHAR_FIELD2_MASK) >> 7) |
| | 203 | #define CHAR_FIELD3(c) ((c) & CHAR_FIELD3_MASK) |
| | 204 | |
| | 205 | /* Minimum character code of character of each DIMENSION. */ |
| | 206 | #define MIN_CHAR_OFFICIAL_DIMENSION1 \ |
| | 207 | ((MIN_CHARSET_OFFICIAL_DIMENSION1 - 0x70) << 7) |
| | 208 | #define MIN_CHAR_PRIVATE_DIMENSION1 \ |
| | 209 | ((MIN_CHARSET_PRIVATE_DIMENSION1 - 0x70) << 7) |
| | 210 | #define MIN_CHAR_OFFICIAL_DIMENSION2 \ |
| | 211 | ((MIN_CHARSET_OFFICIAL_DIMENSION2 - 0x8F) << 14) |
| | 212 | #define MIN_CHAR_PRIVATE_DIMENSION2 \ |
| | 213 | ((MIN_CHARSET_PRIVATE_DIMENSION2 - 0xE0) << 14) |
| | 214 | /* Maximum character code currently used plus 1. */ |
| | 215 | #define MAX_CHAR (0x1F << 14) |
| | 216 | |
| | 217 | /* 1 if C is a single byte character, else 0. */ |
| | 218 | #define SINGLE_BYTE_CHAR_P(c) ((unsigned) (c) < 0x100) |
| | 219 | |
| | 220 | /* 1 if BYTE is an ASCII character in itself, in multibyte mode. */ |
| | 221 | #define ASCII_BYTE_P(byte) ((byte) < 0x80) |
| | 222 | |
| | 223 | /* A char-table containing information of each character set. |
| | 224 | |
| | 225 | Unlike ordinary char-tables, this doesn't contain any nested table. |
| | 226 | Only the top level elements are used. Each element is a vector of |
| | 227 | the following information: |
| | 228 | CHARSET-ID, BYTES, DIMENSION, CHARS, WIDTH, DIRECTION, |
| | 229 | LEADING-CODE-BASE, LEADING-CODE-EXT, |
| | 230 | ISO-FINAL-CHAR, ISO-GRAPHIC-PLANE, |
| | 231 | REVERSE-CHARSET, SHORT-NAME, LONG-NAME, DESCRIPTION, |
| | 232 | PLIST. |
| | 233 | |
| | 234 | CHARSET-ID (integer) is the identification number of the charset. |
| | 235 | |
| | 236 | BYTES (integer) is the length of multi-byte form of a character in |
| | 237 | the charset: one of 1, 2, 3, and 4. |
| | 238 | |
| | 239 | DIMENSION (integer) is the number of bytes to represent a character: 1 or 2. |
| | 240 | |
| | 241 | CHARS (integer) is the number of characters in a dimension: 94 or 96. |
| | 242 | |
| | 243 | WIDTH (integer) is the number of columns a character in the charset |
| | 244 | occupies on the screen: one of 0, 1, and 2.. |
| | 245 | |
| | 246 | DIRECTION (integer) is the rendering direction of characters in the |
| | 247 | charset when rendering. If 0, render from left to right, else |
| | 248 | render from right to left. |
| | 249 | |
| | 250 | LEADING-CODE-BASE (integer) is the base leading-code for the |
| | 251 | charset. |
| | 252 | |
| | 253 | LEADING-CODE-EXT (integer) is the extended leading-code for the |
| | 254 | charset. All charsets of less than 0xA0 has the value 0. |
| | 255 | |
| | 256 | ISO-FINAL-CHAR (character) is the final character of the |
| | 257 | corresponding ISO 2022 charset. It is -1 for such a character |
| | 258 | that is used only internally (e.g. `eight-bit-control'). |
| | 259 | |
| | 260 | ISO-GRAPHIC-PLANE (integer) is the graphic plane to be invoked |
| | 261 | while encoding to variants of ISO 2022 coding system, one of the |
| | 262 | following: 0/graphic-plane-left(GL), 1/graphic-plane-right(GR). It |
| | 263 | is -1 for such a character that is used only internally |
| | 264 | (e.g. `eight-bit-control'). |
| | 265 | |
| | 266 | REVERSE-CHARSET (integer) is the charset which differs only in |
| | 267 | LEFT-TO-RIGHT value from the charset. If there's no such a |
| | 268 | charset, the value is -1. |
| | 269 | |
| | 270 | SHORT-NAME (string) is the short name to refer to the charset. |
| | 271 | |
| | 272 | LONG-NAME (string) is the long name to refer to the charset. |
| | 273 | |
| | 274 | DESCRIPTION (string) is the description string of the charset. |
| | 275 | |
| | 276 | PLIST (property list) may contain any type of information a user |
| | 277 | want to put and get by functions `put-charset-property' and |
| | 278 | `get-charset-property' respectively. */ |
| | 279 | extern Lisp_Object Vcharset_table; |
| | 280 | |
| | 281 | /* Macros to access various information of CHARSET in Vcharset_table. |
| | 282 | We provide these macros for efficiency. No range check of CHARSET. */ |
| | 283 | |
| | 284 | /* Return entry of CHARSET (C integer) in Vcharset_table. */ |
| | 285 | #define CHARSET_TABLE_ENTRY(charset) \ |
| | 286 | XCHAR_TABLE (Vcharset_table)->contents[((charset) == CHARSET_ASCII \ |
| | 287 | ? 0 : (charset) + 128)] |
| | 288 | |
| | 289 | /* Return information INFO-IDX of CHARSET. */ |
| | 290 | #define CHARSET_TABLE_INFO(charset, info_idx) \ |
| | 291 | XVECTOR (CHARSET_TABLE_ENTRY (charset))->contents[info_idx] |
| | 292 | |
| | 293 | #define CHARSET_ID_IDX (0) |
| | 294 | #define CHARSET_BYTES_IDX (1) |
| | 295 | #define CHARSET_DIMENSION_IDX (2) |
| | 296 | #define CHARSET_CHARS_IDX (3) |
| | 297 | #define CHARSET_WIDTH_IDX (4) |
| | 298 | #define CHARSET_DIRECTION_IDX (5) |
| | 299 | #define CHARSET_LEADING_CODE_BASE_IDX (6) |
| | 300 | #define CHARSET_LEADING_CODE_EXT_IDX (7) |
| | 301 | #define CHARSET_ISO_FINAL_CHAR_IDX (8) |
| | 302 | #define CHARSET_ISO_GRAPHIC_PLANE_IDX (9) |
| | 303 | #define CHARSET_REVERSE_CHARSET_IDX (10) |
| | 304 | #define CHARSET_SHORT_NAME_IDX (11) |
| | 305 | #define CHARSET_LONG_NAME_IDX (12) |
| | 306 | #define CHARSET_DESCRIPTION_IDX (13) |
| | 307 | #define CHARSET_PLIST_IDX (14) |
| | 308 | /* Size of a vector of each entry of Vcharset_table. */ |
| | 309 | #define CHARSET_MAX_IDX (15) |
| | 310 | |
| | 311 | /* And several more macros to be used frequently. */ |
| | 312 | #define CHARSET_BYTES(charset) \ |
| | 313 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_BYTES_IDX)) |
| | 314 | #define CHARSET_DIMENSION(charset) \ |
| | 315 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_DIMENSION_IDX)) |
| | 316 | #define CHARSET_CHARS(charset) \ |
| | 317 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_CHARS_IDX)) |
| | 318 | #define CHARSET_WIDTH(charset) \ |
| | 319 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_WIDTH_IDX)) |
| | 320 | #define CHARSET_DIRECTION(charset) \ |
| | 321 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_DIRECTION_IDX)) |
| | 322 | #define CHARSET_LEADING_CODE_BASE(charset) \ |
| | 323 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_LEADING_CODE_BASE_IDX)) |
| | 324 | #define CHARSET_LEADING_CODE_EXT(charset) \ |
| | 325 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_LEADING_CODE_EXT_IDX)) |
| | 326 | #define CHARSET_ISO_FINAL_CHAR(charset) \ |
| | 327 | XINT (CHARSET_TABLE_INFO (charset, CHARSET_ISO_FINAL_CHAR_IDX)) |
| | 328 | #define CHARSET_ISO_GRAPHIC_PLANE(charset) \ |
| | 329 | XINT (CHARSET_TABLE_INFO (charset, CHARSET_ISO_GRAPHIC_PLANE_IDX)) |
| | 330 | #define CHARSET_REVERSE_CHARSET(charset) \ |
| | 331 | XINT (CHARSET_TABLE_INFO (charset, CHARSET_REVERSE_CHARSET_IDX)) |
| | 332 | |
| | 333 | /* Macros to specify direction of a charset. */ |
| | 334 | #define CHARSET_DIRECTION_LEFT_TO_RIGHT 0 |
| | 335 | #define CHARSET_DIRECTION_RIGHT_TO_LEFT 1 |
| | 336 | |
| | 337 | /* A vector of charset symbol indexed by charset-id. This is used |
| | 338 | only for returning charset symbol from C functions. */ |
| | 339 | extern Lisp_Object Vcharset_symbol_table; |
| | 340 | |
| | 341 | /* Return symbol of CHARSET. */ |
| | 342 | #define CHARSET_SYMBOL(charset) \ |
| | 343 | XVECTOR (Vcharset_symbol_table)->contents[charset] |
| | 344 | |
| | 345 | /* 1 if CHARSET is in valid value range, else 0. */ |
| | 346 | #define CHARSET_VALID_P(charset) \ |
| | 347 | ((charset) == 0 \ |
| | 348 | || ((charset) > 0x80 && (charset) <= MAX_CHARSET_OFFICIAL_DIMENSION2) \ |
| | 349 | || ((charset) >= MIN_CHARSET_PRIVATE_DIMENSION1 \ |
| | 350 | && (charset) <= MAX_CHARSET) \ |
| | 351 | || ((charset) == CHARSET_8_BIT_CONTROL) \ |
| | 352 | || ((charset) == CHARSET_8_BIT_GRAPHIC)) |
| | 353 | |
| | 354 | /* 1 if CHARSET is already defined, else 0. */ |
| | 355 | #define CHARSET_DEFINED_P(charset) \ |
| | 356 | (((charset) >= 0) && ((charset) <= MAX_CHARSET) \ |
| | 357 | && !NILP (CHARSET_TABLE_ENTRY (charset))) |
| | 358 | |
| | 359 | /* Since the information CHARSET-BYTES and CHARSET-WIDTH of |
| | 360 | Vcharset_table can be retrieved only by the first byte of |
| | 361 | multi-byte form (an ASCII code or a base leading-code), we provide |
| | 362 | here tables to be used by macros BYTES_BY_CHAR_HEAD and |
| | 363 | WIDTH_BY_CHAR_HEAD for faster information retrieval. */ |
| | 364 | extern int bytes_by_char_head[256]; |
| | 365 | extern int width_by_char_head[256]; |
| | 366 | |
| | 367 | #define BYTES_BY_CHAR_HEAD(char_head) \ |
| | 368 | (ASCII_BYTE_P (char_head) ? 1 : bytes_by_char_head[char_head]) |
| | 369 | #define WIDTH_BY_CHAR_HEAD(char_head) \ |
| | 370 | (ASCII_BYTE_P (char_head) ? 1 : width_by_char_head[char_head]) |
| | 371 | |
| | 372 | /* Charset of the character C. */ |
| | 373 | #define CHAR_CHARSET(c) \ |
| | 374 | (SINGLE_BYTE_CHAR_P (c) \ |
| | 375 | ? (ASCII_BYTE_P (c) \ |
| | 376 | ? CHARSET_ASCII \ |
| | 377 | : (c) < 0xA0 ? CHARSET_8_BIT_CONTROL : CHARSET_8_BIT_GRAPHIC) \ |
| | 378 | : ((c) < MIN_CHAR_OFFICIAL_DIMENSION2 \ |
| | 379 | ? CHAR_FIELD2 (c) + 0x70 \ |
| | 380 | : ((c) < MIN_CHAR_PRIVATE_DIMENSION2 \ |
| | 381 | ? CHAR_FIELD1 (c) + 0x8F \ |
| | 382 | : CHAR_FIELD1 (c) + 0xE0))) |
| | 383 | |
| | 384 | /* Check if two characters C1 and C2 belong to the same charset. */ |
| | 385 | #define SAME_CHARSET_P(c1, c2) \ |
| | 386 | (c1 < MIN_CHAR_OFFICIAL_DIMENSION2 \ |
| | 387 | ? (c1 & CHAR_FIELD2_MASK) == (c2 & CHAR_FIELD2_MASK) \ |
| | 388 | : (c1 & CHAR_FIELD1_MASK) == (c2 & CHAR_FIELD1_MASK)) |
| | 389 | |
| | 390 | /* Return a character of which charset is CHARSET and position-codes |
| | 391 | are C1 and C2. DIMENSION1 character ignores C2. */ |
| | 392 | #define MAKE_CHAR(charset, c1, c2) \ |
| | 393 | ((charset) == CHARSET_ASCII \ |
| | 394 | ? (c1) & 0x7F \ |
| | 395 | : (((charset) == CHARSET_8_BIT_CONTROL \ |
| | 396 | || (charset) == CHARSET_8_BIT_GRAPHIC) \ |
| | 397 | ? ((c1) & 0x7F) | 0x80 \ |
| | 398 | : (! CHARSET_DEFINED_P (charset) || CHARSET_DIMENSION (charset) == 1 \ |
| | 399 | ? (((charset) - 0x70) << 7) | ((c1) <= 0 ? 0 : (c1)) \ |
| | 400 | : ((((charset) \ |
| | 401 | - ((charset) < MIN_CHARSET_PRIVATE_DIMENSION2 ? 0x8F : 0xE0)) \ |
| | 402 | << 14) \ |
| | 403 | | ((c2) <= 0 ? 0 : ((c2) & 0x7F)) \ |
| | 404 | | ((c1) <= 0 ? 0 : (((c1) & 0x7F) << 7)))))) |
| | 405 | |
| | 406 | |
| | 407 | /* If GENERICP is nonzero, return nonzero iff C is a valid normal or |
| | 408 | generic character. If GENERICP is zero, return nonzero iff C is a |
| | 409 | valid normal character. */ |
| | 410 | #define CHAR_VALID_P(c, genericp) \ |
| | 411 | ((c) >= 0 \ |
| | 412 | && (SINGLE_BYTE_CHAR_P (c) || char_valid_p (c, genericp))) |
| | 413 | |
| | 414 | /* This default value is used when nonascii-translation-table or |
| | 415 | nonascii-insert-offset fail to convert unibyte character to a valid |
| | 416 | multibyte character. This makes a Latin-1 character. */ |
| | 417 | |
| | 418 | #define DEFAULT_NONASCII_INSERT_OFFSET 0x800 |
| | 419 | |
| | 420 | /* Parse multibyte string STR of length LENGTH and set BYTES to the |
| | 421 | byte length of a character at STR. */ |
| | 422 | |
| | 423 | #ifdef BYTE_COMBINING_DEBUG |
| | 424 | |
| | 425 | #define PARSE_MULTIBYTE_SEQ(str, length, bytes) \ |
| | 426 | do { \ |
| | 427 | int i = 1; \ |
| | 428 | while (i < (length) && ! CHAR_HEAD_P ((str)[i])) i++; \ |
| | 429 | (bytes) = BYTES_BY_CHAR_HEAD ((str)[0]); \ |
| | 430 | if ((bytes) > i) \ |
| | 431 | abort (); \ |
| | 432 | } while (0) |
| | 433 | |
| | 434 | #else /* not BYTE_COMBINING_DEBUG */ |
| | 435 | |
| | 436 | #define PARSE_MULTIBYTE_SEQ(str, length, bytes) \ |
| | 437 | (bytes) = BYTES_BY_CHAR_HEAD ((str)[0]) |
| | 438 | |
| | 439 | #endif /* not BYTE_COMBINING_DEBUG */ |
| | 440 | |
| | 441 | /* Return 1 iff the byte sequence at unibyte string STR (LENGTH bytes) |
| | 442 | is valid as a multibyte form. If valid, by a side effect, BYTES is |
| | 443 | set to the byte length of the multibyte form. */ |
| | 444 | |
| | 445 | #define UNIBYTE_STR_AS_MULTIBYTE_P(str, length, bytes) \ |
| | 446 | (((str)[0] < 0x80 || (str)[0] >= 0xA0) \ |
| | 447 | ? (bytes) = 1 \ |
| | 448 | : (((bytes) = BYTES_BY_CHAR_HEAD ((str)[0])), \ |
| | 449 | ((str)[0] != LEADING_CODE_8_BIT_CONTROL \ |
| | 450 | && (bytes) <= (length) \ |
| | 451 | && !CHAR_HEAD_P ((str)[1]) \ |
| | 452 | && ((bytes) == 2 \ |
| | 453 | || (!CHAR_HEAD_P ((str)[2]) \ |
| | 454 | && ((bytes) == 3 \ |
| | 455 | || !CHAR_HEAD_P ((str)[3]))))))) |
| | 456 | |
| | 457 | /* Return 1 iff the byte sequence at multibyte string STR is valid as |
| | 458 | a unibyte form. By a side effect, BYTES is set to the byte length |
| | 459 | of one character at STR. */ |
| | 460 | |
| | 461 | #define MULTIBYTE_STR_AS_UNIBYTE_P(str, bytes) \ |
| | 462 | ((bytes) = BYTES_BY_CHAR_HEAD ((str)[0]), \ |
| | 463 | (str)[0] != LEADING_CODE_8_BIT_CONTROL) |
| | 464 | |
| | 465 | /* The charset of character C is stored in CHARSET, and the |
| | 466 | position-codes of C are stored in C1 and C2. |
| | 467 | We store -1 in C2 if the dimension of the charset is 1. */ |
| | 468 | |
| | 469 | #define SPLIT_CHAR(c, charset, c1, c2) \ |
| | 470 | (SINGLE_BYTE_CHAR_P (c) \ |
| | 471 | ? ((charset = ASCII_BYTE_P (c) \ |
| | 472 | ? CHARSET_ASCII \ |
| | 473 | : (c) < 0xA0 ? CHARSET_8_BIT_CONTROL : CHARSET_8_BIT_GRAPHIC), \ |
| | 474 | c1 = (c), c2 = -1) \ |
| | 475 | : ((c) & CHAR_FIELD1_MASK \ |
| | 476 | ? (charset = (CHAR_FIELD1 (c) \ |
| | 477 | + ((c) < MIN_CHAR_PRIVATE_DIMENSION2 ? 0x8F : 0xE0)), \ |
| | 478 | c1 = CHAR_FIELD2 (c), \ |
| | 479 | c2 = CHAR_FIELD3 (c)) \ |
| | 480 | : (charset = CHAR_FIELD2 (c) + 0x70, \ |
| | 481 | c1 = CHAR_FIELD3 (c), \ |
| | 482 | c2 = -1))) |
| | 483 | |
| | 484 | /* Return 1 iff character C has valid printable glyph. */ |
| | 485 | #define CHAR_PRINTABLE_P(c) (ASCII_BYTE_P (c) || char_printable_p (c)) |
| | 486 | |
| | 487 | /* The charset of the character at STR is stored in CHARSET, and the |
| | 488 | position-codes are stored in C1 and C2. |
| | 489 | We store -1 in C2 if the character is just 2 bytes. */ |
| | 490 | |
| | 491 | #define SPLIT_STRING(str, len, charset, c1, c2) \ |
| | 492 | ((BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) < 2 \ |
| | 493 | || BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) > len \ |
| | 494 | || split_string (str, len, &charset, &c1, &c2) < 0) \ |
| | 495 | ? c1 = *(str), charset = CHARSET_ASCII \ |
| | 496 | : charset) |
| | 497 | |
| | 498 | /* Mapping table from ISO2022's charset (specified by DIMENSION, |
| | 499 | CHARS, and FINAL_CHAR) to Emacs' charset. Should be accessed by |
| | 500 | macro ISO_CHARSET_TABLE (DIMENSION, CHARS, FINAL_CHAR). */ |
| | 501 | extern int iso_charset_table[2][2][128]; |
| | 502 | |
| | 503 | #define ISO_CHARSET_TABLE(dimension, chars, final_char) \ |
| | 504 | iso_charset_table[XINT (dimension) - 1][XINT (chars) > 94][XINT (final_char)] |
| | 505 | |
| | 506 | #define BASE_LEADING_CODE_P(c) (BYTES_BY_CHAR_HEAD ((unsigned char) (c)) > 1) |
| | 507 | |
| | 508 | /* Return how many bytes C will occupy in a multibyte buffer. */ |
| | 509 | #define CHAR_BYTES(c) \ |
| | 510 | (SINGLE_BYTE_CHAR_P (c) \ |
| | 511 | ? ((ASCII_BYTE_P (c) || (c) >= 0xA0) ? 1 : 2) \ |
| | 512 | : char_bytes (c)) |
| | 513 | |
| | 514 | /* The following two macros CHAR_STRING and STRING_CHAR are the main |
| | 515 | entry points to convert between Emacs two types of character |
| | 516 | representations: multi-byte form and single-word form (character |
| | 517 | code). */ |
| | 518 | |
| | 519 | /* Store multi-byte form of the character C in STR. The caller should |
| | 520 | allocate at least MAX_MULTIBYTE_LENGTH bytes area at STR in |
| | 521 | advance. Returns the length of the multi-byte form. If C is an |
| | 522 | invalid character code, signal an error. */ |
| | 523 | |
| | 524 | #define CHAR_STRING(c, str) \ |
| | 525 | (ASCII_BYTE_P (c) \ |
| | 526 | ? (*(str) = (unsigned char)(c), 1) \ |
| | 527 | : char_to_string (c, (unsigned char *) str)) |
| | 528 | |
| | 529 | /* Return a character code of the character of which multi-byte form |
| | 530 | is at STR and the length is LEN. If STR doesn't contain valid |
| | 531 | multi-byte form, only the first byte in STR is returned. */ |
| | 532 | |
| | 533 | #define STRING_CHAR(str, len) \ |
| | 534 | (BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) == 1 \ |
| | 535 | ? (unsigned char) *(str) \ |
| | 536 | : string_to_char (str, len, 0)) |
| | 537 | |
| | 538 | /* This is like STRING_CHAR but the third arg ACTUAL_LEN is set to the |
| | 539 | length of the multi-byte form. Just to know the length, use |
| | 540 | MULTIBYTE_FORM_LENGTH. */ |
| | 541 | |
| | 542 | #define STRING_CHAR_AND_LENGTH(str, len, actual_len) \ |
| | 543 | (BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) == 1 \ |
| | 544 | ? ((actual_len) = 1), (unsigned char) *(str) \ |
| | 545 | : string_to_char (str, len, &(actual_len))) |
| | 546 | |
| | 547 | /* Fetch the "next" character from Lisp string STRING at byte position |
| | 548 | BYTEIDX, character position CHARIDX. Store it into OUTPUT. |
| | 549 | |
| | 550 | All the args must be side-effect-free. |
| | 551 | BYTEIDX and CHARIDX must be lvalues; |
| | 552 | we increment them past the character fetched. */ |
| | 553 | |
| | 554 | #define FETCH_STRING_CHAR_ADVANCE(OUTPUT, STRING, CHARIDX, BYTEIDX) \ |
| | 555 | if (1) \ |
| | 556 | { \ |
| | 557 | CHARIDX++; \ |
| | 558 | if (STRING_MULTIBYTE (STRING)) \ |
| | 559 | { \ |
| | 560 | unsigned char *ptr = &XSTRING (STRING)->data[BYTEIDX]; \ |
| | 561 | int space_left = XSTRING (STRING)->size_byte - BYTEIDX; \ |
| | 562 | int actual_len; \ |
| | 563 | \ |
| | 564 | OUTPUT = STRING_CHAR_AND_LENGTH (ptr, space_left, actual_len); \ |
| | 565 | BYTEIDX += actual_len; \ |
| | 566 | } \ |
| | 567 | else \ |
| | 568 | OUTPUT = XSTRING (STRING)->data[BYTEIDX++]; \ |
| | 569 | } \ |
| | 570 | else |
| | 571 | |
| | 572 | /* Like FETCH_STRING_CHAR_ADVANCE but assume STRING is multibyte. */ |
| | 573 | |
| | 574 | #define FETCH_STRING_CHAR_ADVANCE_NO_CHECK(OUTPUT, STRING, CHARIDX, BYTEIDX) \ |
| | 575 | if (1) \ |
| | 576 | { \ |
| | 577 | unsigned char *fetch_string_char_ptr = &XSTRING (STRING)->data[BYTEIDX]; \ |
| | 578 | int fetch_string_char_space_left = XSTRING (STRING)->size_byte - BYTEIDX; \ |
| | 579 | int actual_len; \ |
| | 580 | \ |
| | 581 | OUTPUT \ |
| | 582 | = STRING_CHAR_AND_LENGTH (fetch_string_char_ptr, \ |
| | 583 | fetch_string_char_space_left, actual_len); \ |
| | 584 | \ |
| | 585 | BYTEIDX += actual_len; \ |
| | 586 | CHARIDX++; \ |
| | 587 | } \ |
| | 588 | else |
| | 589 | |
| | 590 | /* Like FETCH_STRING_CHAR_ADVANCE but fetch character from the current |
| | 591 | buffer. */ |
| | 592 | |
| | 593 | #define FETCH_CHAR_ADVANCE(OUTPUT, CHARIDX, BYTEIDX) \ |
| | 594 | if (1) \ |
| | 595 | { \ |
| | 596 | CHARIDX++; \ |
| | 597 | if (!NILP (current_buffer->enable_multibyte_characters)) \ |
| | 598 | { \ |
| | 599 | unsigned char *ptr = BYTE_POS_ADDR (BYTEIDX); \ |
| | 600 | int space_left = ((CHARIDX < GPT ? GPT_BYTE : Z_BYTE) - BYTEIDX); \ |
| | 601 | int actual_len; \ |
| | 602 | \ |
| | 603 | OUTPUT= STRING_CHAR_AND_LENGTH (ptr, space_left, actual_len); \ |
| | 604 | BYTEIDX += actual_len; \ |
| | 605 | } \ |
| | 606 | else \ |
| | 607 | { \ |
| | 608 | OUTPUT = *(BYTE_POS_ADDR (BYTEIDX)); \ |
| | 609 | BYTEIDX++; \ |
| | 610 | } \ |
| | 611 | } \ |
| | 612 | else |
| | 613 | |
| | 614 | /* Return the length of the multi-byte form at string STR of length LEN. */ |
| | 615 | |
| | 616 | #define MULTIBYTE_FORM_LENGTH(str, len) \ |
| | 617 | (BYTES_BY_CHAR_HEAD (*(unsigned char *)(str)) == 1 \ |
| | 618 | ? 1 \ |
| | 619 | : multibyte_form_length (str, len)) |
| | 620 | |
| | 621 | #ifdef emacs |
| | 622 | |
| | 623 | /* Increase the buffer byte position POS_BYTE of the current buffer to |
| | 624 | the next character boundary. This macro relies on the fact that |
| | 625 | *GPT_ADDR and *Z_ADDR are always accessible and the values are |
| | 626 | '\0'. No range checking of POS. */ |
| | 627 | |
| | 628 | #ifdef BYTE_COMBINING_DEBUG |
| | 629 | |
| | 630 | #define INC_POS(pos_byte) \ |
| | 631 | do { \ |
| | 632 | unsigned char *p = BYTE_POS_ADDR (pos_byte); \ |
| | 633 | if (BASE_LEADING_CODE_P (*p)) \ |
| | 634 | { \ |
| | 635 | int len, bytes; \ |
| | 636 | len = Z_BYTE - pos_byte; \ |
| | 637 | PARSE_MULTIBYTE_SEQ (p, len, bytes); \ |
| | 638 | pos_byte += bytes; \ |
| | 639 | } \ |
| | 640 | else \ |
| | 641 | pos_byte++; \ |
| | 642 | } while (0) |
| | 643 | |
| | 644 | #else /* not BYTE_COMBINING_DEBUG */ |
| | 645 | |
| | 646 | #define INC_POS(pos_byte) \ |
| | 647 | do { \ |
| | 648 | unsigned char *p = BYTE_POS_ADDR (pos_byte); \ |
| | 649 | pos_byte += BYTES_BY_CHAR_HEAD (*p); \ |
| | 650 | } while (0) |
| | 651 | |
| | 652 | #endif /* not BYTE_COMBINING_DEBUG */ |
| | 653 | |
| | 654 | /* Decrease the buffer byte position POS_BYTE of the current buffer to |
| | 655 | the previous character boundary. No range checking of POS. */ |
| | 656 | #define DEC_POS(pos_byte) \ |
| | 657 | do { \ |
| | 658 | unsigned char *p, *p_min; \ |
| | 659 | \ |
| | 660 | pos_byte--; \ |
| | 661 | if (pos_byte < GPT_BYTE) \ |
| | 662 | p = BEG_ADDR + pos_byte - 1, p_min = BEG_ADDR; \ |
| | 663 | else \ |
| | 664 | p = BEG_ADDR + GAP_SIZE + pos_byte - 1, p_min = GAP_END_ADDR; \ |
| | 665 | if (p > p_min && !CHAR_HEAD_P (*p)) \ |
| | 666 | { \ |
| | 667 | unsigned char *pend = p--; \ |
| | 668 | int len, bytes; \ |
| | 669 | while (p > p_min && !CHAR_HEAD_P (*p)) p--; \ |
| | 670 | len = pend + 1 - p; \ |
| | 671 | PARSE_MULTIBYTE_SEQ (p, len, bytes); \ |
| | 672 | if (bytes == len) \ |
| | 673 | pos_byte -= len - 1; \ |
| | 674 | } \ |
| | 675 | } while (0) |
| | 676 | |
| | 677 | /* Increment both CHARPOS and BYTEPOS, each in the appropriate way. */ |
| | 678 | |
| | 679 | #define INC_BOTH(charpos, bytepos) \ |
| | 680 | do \ |
| | 681 | { \ |
| | 682 | (charpos)++; \ |
| | 683 | if (NILP (current_buffer->enable_multibyte_characters)) \ |
| | 684 | (bytepos)++; \ |
| | 685 | else \ |
| | 686 | INC_POS ((bytepos)); \ |
| | 687 | } \ |
| | 688 | while (0) |
| | 689 | |
| | 690 | /* Decrement both CHARPOS and BYTEPOS, each in the appropriate way. */ |
| | 691 | |
| | 692 | #define DEC_BOTH(charpos, bytepos) \ |
| | 693 | do \ |
| | 694 | { \ |
| | 695 | (charpos)--; \ |
| | 696 | if (NILP (current_buffer->enable_multibyte_characters)) \ |
| | 697 | (bytepos)--; \ |
| | 698 | else \ |
| | 699 | DEC_POS ((bytepos)); \ |
| | 700 | } \ |
| | 701 | while (0) |
| | 702 | |
| | 703 | /* Increase the buffer byte position POS_BYTE of the current buffer to |
| | 704 | the next character boundary. This macro relies on the fact that |
| | 705 | *GPT_ADDR and *Z_ADDR are always accessible and the values are |
| | 706 | '\0'. No range checking of POS_BYTE. */ |
| | 707 | |
| | 708 | #ifdef BYTE_COMBINING_DEBUG |
| | 709 | |
| | 710 | #define BUF_INC_POS(buf, pos_byte) \ |
| | 711 | do { \ |
| | 712 | unsigned char *p = BUF_BYTE_ADDRESS (buf, pos_byte); \ |
| | 713 | if (BASE_LEADING_CODE_P (*p)) \ |
| | 714 | { \ |
| | 715 | int len, bytes; \ |
| | 716 | len = BUF_Z_BYTE (buf) - pos_byte; \ |
| | 717 | PARSE_MULTIBYTE_SEQ (p, len, bytes); \ |
| | 718 | pos_byte += bytes; \ |
| | 719 | } \ |
| | 720 | else \ |
| | 721 | pos_byte++; \ |
| | 722 | } while (0) |
| | 723 | |
| | 724 | #else /* not BYTE_COMBINING_DEBUG */ |
| | 725 | |
| | 726 | #define BUF_INC_POS(buf, pos_byte) \ |
| | 727 | do { \ |
| | 728 | unsigned char *p = BUF_BYTE_ADDRESS (buf, pos_byte); \ |
| | 729 | pos_byte += BYTES_BY_CHAR_HEAD (*p); \ |
| | 730 | } while (0) |
| | 731 | |
| | 732 | #endif /* not BYTE_COMBINING_DEBUG */ |
| | 733 | |
| | 734 | /* Decrease the buffer byte position POS_BYTE of the current buffer to |
| | 735 | the previous character boundary. No range checking of POS_BYTE. */ |
| | 736 | #define BUF_DEC_POS(buf, pos_byte) \ |
| | 737 | do { \ |
| | 738 | unsigned char *p, *p_min; \ |
| | 739 | pos_byte--; \ |
| | 740 | if (pos_byte < BUF_GPT_BYTE (buf)) \ |
| | 741 | { \ |
| | 742 | p = BUF_BEG_ADDR (buf) + pos_byte - 1; \ |
| | 743 | p_min = BUF_BEG_ADDR (buf); \ |
| | 744 | } \ |
| | 745 | else \ |
| | 746 | { \ |
| | 747 | p = BUF_BEG_ADDR (buf) + BUF_GAP_SIZE (buf) + pos_byte - 1; \ |
| | 748 | p_min = BUF_GAP_END_ADDR (buf); \ |
| | 749 | } \ |
| | 750 | if (p > p_min && !CHAR_HEAD_P (*p)) \ |
| | 751 | { \ |
| | 752 | unsigned char *pend = p--; \ |
| | 753 | int len, bytes; \ |
| | 754 | while (p > p_min && !CHAR_HEAD_P (*p)) p--; \ |
| | 755 | len = pend + 1 - p; \ |
| | 756 | PARSE_MULTIBYTE_SEQ (p, len, bytes); \ |
| | 757 | if (bytes == len) \ |
| | 758 | pos_byte -= len - 1; \ |
| | 759 | } \ |
| | 760 | } while (0) |
| | 761 | |
| | 762 | #endif /* emacs */ |
| | 763 | |
| | 764 | /* This is the maximum byte length of multi-byte sequence. */ |
| | 765 | #define MAX_MULTIBYTE_LENGTH 4 |
| | 766 | |
| | 767 | extern void invalid_character P_ ((int)); |
| | 768 | |
| | 769 | extern int translate_char P_ ((Lisp_Object, int, int, int, int)); |
| | 770 | extern int split_string P_ ((const unsigned char *, int, int *, |
| | 771 | unsigned char *, unsigned char *)); |
| | 772 | extern int char_to_string P_ ((int, unsigned char *)); |
| | 773 | extern int string_to_char P_ ((const unsigned char *, int, int *)); |
| | 774 | extern int char_printable_p P_ ((int c)); |
| | 775 | extern int multibyte_form_length P_ ((const unsigned char *, int)); |
| | 776 | extern void parse_str_as_multibyte P_ ((unsigned char *, int, int *, int *)); |
| | 777 | extern int str_as_multibyte P_ ((unsigned char *, int, int, int *)); |
| | 778 | extern int str_to_multibyte P_ ((unsigned char *, int, int)); |
| | 779 | extern int str_as_unibyte P_ ((unsigned char *, int)); |
| | 780 | extern int get_charset_id P_ ((Lisp_Object)); |
| | 781 | extern int find_charset_in_text P_ ((unsigned char *, int, int, int *, |
| | 782 | Lisp_Object)); |
| | 783 | extern int strwidth P_ ((unsigned char *, int)); |
| | 784 | extern int char_bytes P_ ((int)); |
| | 785 | extern int char_valid_p P_ ((int, int)); |
| | 786 | |
| | 787 | extern Lisp_Object Vtranslation_table_vector; |
| | 788 | |
| | 789 | /* Return a translation table of id number ID. */ |
| | 790 | #define GET_TRANSLATION_TABLE(id) \ |
| | 791 | (XCDR(XVECTOR(Vtranslation_table_vector)->contents[(id)])) |
| | 792 | |
| | 793 | /* A char-table for characters which may invoke auto-filling. */ |
| | 794 | extern Lisp_Object Vauto_fill_chars; |
| | 795 | |
| | 796 | /* Copy LEN bytes from FROM to TO. This macro should be used only |
| | 797 | when a caller knows that LEN is short and the obvious copy loop is |
| | 798 | faster than calling bcopy which has some overhead. Copying a |
| | 799 | multibyte sequence of a multibyte character is the typical case. */ |
| | 800 | |
| | 801 | #define BCOPY_SHORT(from, to, len) \ |
| | 802 | do { \ |
| | 803 | int i = len; \ |
| | 804 | unsigned char *from_p = from, *to_p = to; \ |
| | 805 | while (i--) *to_p++ = *from_p++; \ |
| | 806 | } while (0) |
| | 807 | |
| | 808 | #endif /* EMACS_CHARSET_H */ |
HCoop / bpt / emacs.git / blame_incremental