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f49b37c9 | 1 | /* Header for multibyte character handler. |
4a2f9c6a | 2 | Copyright (C) 1995, 1997, 1998 Electrotechnical Laboratory, JAPAN. |
75c8c592 | 3 | Licensed to the Free Software Foundation. |
e06aa1f9 | 4 | Copyright (C) 2001 Free Software Foundation, Inc. |
4ed46869 | 5 | |
369314dc KH |
6 | This file is part of GNU Emacs. |
7 | ||
8 | GNU Emacs is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
4ed46869 | 12 | |
369314dc KH |
13 | GNU Emacs is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
4ed46869 | 17 | |
369314dc KH |
18 | You should have received a copy of the GNU General Public License |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
20 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
4ed46869 | 22 | |
aa01a892 KH |
23 | #ifndef EMACS_CHARSET_H |
24 | #define EMACS_CHARSET_H | |
4ed46869 | 25 | |
6e4dc3e1 KH |
26 | /* #define BYTE_COMBINING_DEBUG */ |
27 | ||
4ed46869 KH |
28 | /*** GENERAL NOTE on CHARACTER SET (CHARSET) *** |
29 | ||
30 | A character set ("charset" hereafter) is a meaningful collection | |
31 | (i.e. language, culture, functionality, etc) of characters. Emacs | |
32 | handles multiple charsets at once. Each charset corresponds to one | |
d8e4f486 | 33 | of the ISO charsets. Emacs identifies a charset by a unique |
f49b37c9 KH |
34 | identification number, whereas ISO identifies a charset by a triplet |
35 | of DIMENSION, CHARS and FINAL-CHAR. So, hereafter, just saying | |
36 | "charset" means an identification number (integer value). | |
4ed46869 | 37 | |
d8e4f486 | 38 | The value range of charsets is 0x00, 0x81..0xFE. There are four |
4ed46869 KH |
39 | kinds of charset depending on DIMENSION (1 or 2) and CHARS (94 or |
40 | 96). For instance, a charset of DIMENSION2_CHARS94 contains 94x94 | |
f49b37c9 | 41 | characters. |
4ed46869 KH |
42 | |
43 | Within Emacs Lisp, a charset is treated as a symbol which has a | |
44 | property `charset'. The property value is a vector containing | |
d8e4f486 | 45 | various information about the charset. For readability of C code, |
f49b37c9 | 46 | we use the following convention for C variable names: |
4ed46869 KH |
47 | charset_symbol: Emacs Lisp symbol of a charset |
48 | charset_id: Emacs Lisp integer of an identification number of a charset | |
49 | charset: C integer of an identification number of a charset | |
50 | ||
6e4dc3e1 KH |
51 | Each charset (except for ascii) is assigned a base leading-code |
52 | (range 0x80..0x9E). In addition, a charset of greater than 0xA0 | |
4ed46869 KH |
53 | (whose base leading-code is 0x9A..0x9D) is assigned an extended |
54 | leading-code (range 0xA0..0xFE). In this case, each base | |
d8e4f486 DL |
55 | leading-code specifies the allowable range of extended leading-code |
56 | as shown in the table below. A leading-code is used to represent a | |
4ed46869 KH |
57 | character in Emacs' buffer and string. |
58 | ||
d8e4f486 | 59 | We call a charset which has extended leading-code a "private |
f49b37c9 | 60 | charset" because those are mainly for a charset which is not yet |
4ed46869 | 61 | registered by ISO. On the contrary, we call a charset which does |
d8e4f486 | 62 | not have extended leading-code an "official charset". |
4ed46869 KH |
63 | |
64 | --------------------------------------------------------------------------- | |
65 | charset dimension base leading-code extended leading-code | |
66 | --------------------------------------------------------------------------- | |
67 | 0x00 official dim1 -- none -- -- none -- | |
68 | (ASCII) | |
69 | 0x01..0x7F --never used-- | |
88b837a2 KH |
70 | 0x80 official dim1 -- none -- -- none -- |
71 | (eight-bit-graphic) | |
4ed46869 KH |
72 | 0x81..0x8F official dim1 same as charset -- none -- |
73 | 0x90..0x99 official dim2 same as charset -- none -- | |
6e4dc3e1 KH |
74 | 0x9A..0x9D --never used-- |
75 | 0x9E official dim1 same as charset -- none -- | |
76 | (eight-bit-control) | |
88b837a2 | 77 | 0x9F --never used-- |
4ed46869 KH |
78 | 0xA0..0xDF private dim1 0x9A same as charset |
79 | of 1-column width | |
80 | 0xE0..0xEF private dim1 0x9B same as charset | |
81 | of 2-column width | |
82 | 0xF0..0xF4 private dim2 0x9C same as charset | |
83 | of 1-column width | |
84 | 0xF5..0xFE private dim2 0x9D same as charset | |
85 | of 2-column width | |
86 | 0xFF --never used-- | |
87 | --------------------------------------------------------------------------- | |
88 | ||
4ed46869 KH |
89 | */ |
90 | ||
91 | /* Definition of special leading-codes. */ | |
4ed46869 KH |
92 | /* Leading-code followed by extended leading-code. */ |
93 | #define LEADING_CODE_PRIVATE_11 0x9A /* for private DIMENSION1 of 1-column */ | |
94 | #define LEADING_CODE_PRIVATE_12 0x9B /* for private DIMENSION1 of 2-column */ | |
95 | #define LEADING_CODE_PRIVATE_21 0x9C /* for private DIMENSION2 of 1-column */ | |
5c6257e5 | 96 | #define LEADING_CODE_PRIVATE_22 0x9D /* for private DIMENSION2 of 2-column */ |
4ed46869 | 97 | |
6e4dc3e1 KH |
98 | #define LEADING_CODE_8_BIT_CONTROL 0x9E /* for `eight-bit-control' */ |
99 | ||
4ed46869 KH |
100 | /* Extended leading-code. */ |
101 | /* Start of each extended leading-codes. */ | |
102 | #define LEADING_CODE_EXT_11 0xA0 /* follows LEADING_CODE_PRIVATE_11 */ | |
103 | #define LEADING_CODE_EXT_12 0xE0 /* follows LEADING_CODE_PRIVATE_12 */ | |
104 | #define LEADING_CODE_EXT_21 0xF0 /* follows LEADING_CODE_PRIVATE_21 */ | |
105 | #define LEADING_CODE_EXT_22 0xF5 /* follows LEADING_CODE_PRIVATE_22 */ | |
106 | /* Maximum value of extended leading-codes. */ | |
107 | #define LEADING_CODE_EXT_MAX 0xFE | |
108 | ||
109 | /* Definition of minimum/maximum charset of each DIMENSION. */ | |
2b9eeded | 110 | #define MIN_CHARSET_OFFICIAL_DIMENSION1 0x80 |
4ed46869 KH |
111 | #define MAX_CHARSET_OFFICIAL_DIMENSION1 0x8F |
112 | #define MIN_CHARSET_OFFICIAL_DIMENSION2 0x90 | |
113 | #define MAX_CHARSET_OFFICIAL_DIMENSION2 0x99 | |
114 | #define MIN_CHARSET_PRIVATE_DIMENSION1 LEADING_CODE_EXT_11 | |
115 | #define MIN_CHARSET_PRIVATE_DIMENSION2 LEADING_CODE_EXT_21 | |
116 | ||
03e66c53 KH |
117 | /* Maximum value of overall charset identification number. */ |
118 | #define MAX_CHARSET 0xFE | |
119 | ||
4ed46869 | 120 | /* Definition of special charsets. */ |
6e4dc3e1 KH |
121 | #define CHARSET_ASCII 0 /* 0x00..0x7F */ |
122 | #define CHARSET_8_BIT_CONTROL 0x9E /* 0x80..0x9F */ | |
88b837a2 | 123 | #define CHARSET_8_BIT_GRAPHIC 0x80 /* 0xA0..0xFF */ |
4ed46869 | 124 | |
4ed46869 KH |
125 | extern int charset_latin_iso8859_1; /* ISO8859-1 (Latin-1) */ |
126 | extern int charset_jisx0208_1978; /* JISX0208.1978 (Japanese Kanji old set) */ | |
127 | extern int charset_jisx0208; /* JISX0208.1983 (Japanese Kanji) */ | |
128 | extern int charset_katakana_jisx0201; /* JISX0201.Kana (Japanese Katakana) */ | |
129 | extern int charset_latin_jisx0201; /* JISX0201.Roman (Japanese Roman) */ | |
130 | extern int charset_big5_1; /* Big5 Level 1 (Chinese Traditional) */ | |
131 | extern int charset_big5_2; /* Big5 Level 2 (Chinese Traditional) */ | |
132 | ||
6e4dc3e1 KH |
133 | /* Check if CH is an ASCII character or a base leading-code. |
134 | Nowadays, any byte can be the first byte of a character in a | |
135 | multibyte buffer/string. So this macro name is not appropriate. */ | |
c399b461 | 136 | #define CHAR_HEAD_P(ch) ((unsigned char) (ch) < 0xA0) |
4ed46869 KH |
137 | |
138 | /*** GENERAL NOTE on CHARACTER REPRESENTATION *** | |
139 | ||
d8e4f486 DL |
140 | Firstly, the term "character" or "char" is used for a multilingual |
141 | character (of course, including ASCII characters), not for a byte in | |
4ed46869 KH |
142 | computer memory. We use the term "code" or "byte" for the latter |
143 | case. | |
144 | ||
145 | A character is identified by charset and one or two POSITION-CODEs. | |
146 | POSITION-CODE is the position of the character in the charset. A | |
147 | character of DIMENSION1 charset has one POSITION-CODE: POSITION-CODE-1. | |
148 | A character of DIMENSION2 charset has two POSITION-CODE: | |
149 | POSITION-CODE-1 and POSITION-CODE-2. The code range of | |
150 | POSITION-CODE is 0x20..0x7F. | |
151 | ||
152 | Emacs has two kinds of representation of a character: multi-byte | |
d8e4f486 DL |
153 | form (for buffers and strings) and single-word form (for character |
154 | objects in Emacs Lisp). The latter is called "character code" | |
155 | hereafter. Both representations encode the information of charset | |
156 | and POSITION-CODE but in a different way (for instance, the MSB of | |
4ed46869 KH |
157 | POSITION-CODE is set in multi-byte form). |
158 | ||
d8e4f486 DL |
159 | For details of the multi-byte form, see the section "2. Emacs |
160 | internal format handlers" of `coding.c'. | |
4ed46869 KH |
161 | |
162 | Emacs uses 19 bits for a character code. The bits are divided into | |
163 | 3 fields: FIELD1(5bits):FIELD2(7bits):FIELD3(7bits). | |
164 | ||
165 | A character code of DIMENSION1 character uses FIELD2 to hold charset | |
166 | and FIELD3 to hold POSITION-CODE-1. A character code of DIMENSION2 | |
167 | character uses FIELD1 to hold charset, FIELD2 and FIELD3 to hold | |
168 | POSITION-CODE-1 and POSITION-CODE-2 respectively. | |
169 | ||
170 | More precisely... | |
171 | ||
6e4dc3e1 KH |
172 | FIELD2 of DIMENSION1 character (except for ascii, eight-bit-control, |
173 | and eight-bit-graphic) is "charset - 0x70". This is to make all | |
174 | character codes except for ASCII and 8-bit codes greater than 256. | |
175 | So, the range of FIELD2 of DIMENSION1 character is 0, 1, or | |
176 | 0x11..0x7F. | |
4ed46869 KH |
177 | |
178 | FIELD1 of DIMENSION2 character is "charset - 0x8F" for official | |
179 | charset and "charset - 0xE0" for private charset. So, the range of | |
180 | FIELD1 of DIMENSION2 character is 0x01..0x1E. | |
181 | ||
6e4dc3e1 KH |
182 | ----------------------------------------------------------------------------- |
183 | charset FIELD1 (5-bit) FIELD2 (7-bit) FIELD3 (7-bit) | |
184 | ----------------------------------------------------------------------------- | |
185 | ascii 0 0 0x00..0x7F | |
186 | eight-bit-control 0 1 0x00..0x1F | |
187 | eight-bit-graphic 0 1 0x20..0x7F | |
188 | DIMENSION1 0 charset - 0x70 POSITION-CODE-1 | |
189 | DIMENSION2(o) charset - 0x8F POSITION-CODE-1 POSITION-CODE-2 | |
190 | DIMENSION2(p) charset - 0xE0 POSITION-CODE-1 POSITION-CODE-2 | |
191 | ----------------------------------------------------------------------------- | |
4ed46869 | 192 | "(o)": official, "(p)": private |
6e4dc3e1 | 193 | ----------------------------------------------------------------------------- |
4ed46869 KH |
194 | */ |
195 | ||
4ed46869 KH |
196 | /* Masks of each field of character code. */ |
197 | #define CHAR_FIELD1_MASK (0x1F << 14) | |
198 | #define CHAR_FIELD2_MASK (0x7F << 7) | |
199 | #define CHAR_FIELD3_MASK 0x7F | |
200 | ||
201 | /* Macros to access each field of character C. */ | |
202 | #define CHAR_FIELD1(c) (((c) & CHAR_FIELD1_MASK) >> 14) | |
203 | #define CHAR_FIELD2(c) (((c) & CHAR_FIELD2_MASK) >> 7) | |
204 | #define CHAR_FIELD3(c) ((c) & CHAR_FIELD3_MASK) | |
205 | ||
206 | /* Minimum character code of character of each DIMENSION. */ | |
207 | #define MIN_CHAR_OFFICIAL_DIMENSION1 \ | |
2b9eeded | 208 | ((0x81 - 0x70) << 7) |
4ed46869 KH |
209 | #define MIN_CHAR_PRIVATE_DIMENSION1 \ |
210 | ((MIN_CHARSET_PRIVATE_DIMENSION1 - 0x70) << 7) | |
211 | #define MIN_CHAR_OFFICIAL_DIMENSION2 \ | |
212 | ((MIN_CHARSET_OFFICIAL_DIMENSION2 - 0x8F) << 14) | |
213 | #define MIN_CHAR_PRIVATE_DIMENSION2 \ | |
214 | ((MIN_CHARSET_PRIVATE_DIMENSION2 - 0xE0) << 14) | |
f49b37c9 KH |
215 | /* Maximum character code currently used plus 1. */ |
216 | #define MAX_CHAR (0x1F << 14) | |
4ed46869 | 217 | |
6e4dc3e1 KH |
218 | /* 1 if C is a single byte character, else 0. */ |
219 | #define SINGLE_BYTE_CHAR_P(c) ((unsigned) (c) < 0x100) | |
4ed46869 | 220 | |
6e4dc3e1 | 221 | /* 1 if BYTE is an ASCII character in itself, in multibyte mode. */ |
7614f779 KH |
222 | #define ASCII_BYTE_P(byte) ((byte) < 0x80) |
223 | ||
d8e4f486 | 224 | /* A char-table containing information on each character set. |
4ed46869 | 225 | |
d8e4f486 | 226 | Unlike ordinary char-tables, this doesn't contain any nested tables. |
4ed46869 KH |
227 | Only the top level elements are used. Each element is a vector of |
228 | the following information: | |
229 | CHARSET-ID, BYTES, DIMENSION, CHARS, WIDTH, DIRECTION, | |
230 | LEADING-CODE-BASE, LEADING-CODE-EXT, | |
231 | ISO-FINAL-CHAR, ISO-GRAPHIC-PLANE, | |
232 | REVERSE-CHARSET, SHORT-NAME, LONG-NAME, DESCRIPTION, | |
233 | PLIST. | |
234 | ||
235 | CHARSET-ID (integer) is the identification number of the charset. | |
236 | ||
d8e4f486 DL |
237 | BYTES (integer) is the length of the multi-byte form of a character |
238 | in the charset: one of 1, 2, 3, and 4. | |
4ed46869 KH |
239 | |
240 | DIMENSION (integer) is the number of bytes to represent a character: 1 or 2. | |
241 | ||
242 | CHARS (integer) is the number of characters in a dimension: 94 or 96. | |
243 | ||
244 | WIDTH (integer) is the number of columns a character in the charset | |
6e4dc3e1 | 245 | occupies on the screen: one of 0, 1, and 2.. |
4ed46869 KH |
246 | |
247 | DIRECTION (integer) is the rendering direction of characters in the | |
28d0c844 KH |
248 | charset when rendering. If 0, render from left to right, else |
249 | render from right to left. | |
4ed46869 KH |
250 | |
251 | LEADING-CODE-BASE (integer) is the base leading-code for the | |
252 | charset. | |
253 | ||
254 | LEADING-CODE-EXT (integer) is the extended leading-code for the | |
d8e4f486 | 255 | charset. All charsets of less than 0xA0 have the value 0. |
4ed46869 KH |
256 | |
257 | ISO-FINAL-CHAR (character) is the final character of the | |
6e4dc3e1 KH |
258 | corresponding ISO 2022 charset. It is -1 for such a character |
259 | that is used only internally (e.g. `eight-bit-control'). | |
4ed46869 KH |
260 | |
261 | ISO-GRAPHIC-PLANE (integer) is the graphic plane to be invoked | |
262 | while encoding to variants of ISO 2022 coding system, one of the | |
6e4dc3e1 KH |
263 | following: 0/graphic-plane-left(GL), 1/graphic-plane-right(GR). It |
264 | is -1 for such a character that is used only internally | |
265 | (e.g. `eight-bit-control'). | |
4ed46869 KH |
266 | |
267 | REVERSE-CHARSET (integer) is the charset which differs only in | |
268 | LEFT-TO-RIGHT value from the charset. If there's no such a | |
269 | charset, the value is -1. | |
d8e4f486 | 270 | |
4ed46869 KH |
271 | SHORT-NAME (string) is the short name to refer to the charset. |
272 | ||
273 | LONG-NAME (string) is the long name to refer to the charset. | |
274 | ||
275 | DESCRIPTION (string) is the description string of the charset. | |
276 | ||
277 | PLIST (property list) may contain any type of information a user | |
d8e4f486 | 278 | wants to put and get by functions `put-charset-property' and |
4ed46869 KH |
279 | `get-charset-property' respectively. */ |
280 | extern Lisp_Object Vcharset_table; | |
281 | ||
282 | /* Macros to access various information of CHARSET in Vcharset_table. | |
283 | We provide these macros for efficiency. No range check of CHARSET. */ | |
284 | ||
a3f4e3d9 | 285 | /* Return entry of CHARSET (C integer) in Vcharset_table. */ |
d6f92c04 KH |
286 | #define CHARSET_TABLE_ENTRY(charset) \ |
287 | XCHAR_TABLE (Vcharset_table)->contents[((charset) == CHARSET_ASCII \ | |
288 | ? 0 : (charset) + 128)] | |
4ed46869 KH |
289 | |
290 | /* Return information INFO-IDX of CHARSET. */ | |
291 | #define CHARSET_TABLE_INFO(charset, info_idx) \ | |
292 | XVECTOR (CHARSET_TABLE_ENTRY (charset))->contents[info_idx] | |
293 | ||
294 | #define CHARSET_ID_IDX (0) | |
295 | #define CHARSET_BYTES_IDX (1) | |
296 | #define CHARSET_DIMENSION_IDX (2) | |
297 | #define CHARSET_CHARS_IDX (3) | |
298 | #define CHARSET_WIDTH_IDX (4) | |
299 | #define CHARSET_DIRECTION_IDX (5) | |
300 | #define CHARSET_LEADING_CODE_BASE_IDX (6) | |
301 | #define CHARSET_LEADING_CODE_EXT_IDX (7) | |
302 | #define CHARSET_ISO_FINAL_CHAR_IDX (8) | |
303 | #define CHARSET_ISO_GRAPHIC_PLANE_IDX (9) | |
304 | #define CHARSET_REVERSE_CHARSET_IDX (10) | |
305 | #define CHARSET_SHORT_NAME_IDX (11) | |
306 | #define CHARSET_LONG_NAME_IDX (12) | |
307 | #define CHARSET_DESCRIPTION_IDX (13) | |
308 | #define CHARSET_PLIST_IDX (14) | |
309 | /* Size of a vector of each entry of Vcharset_table. */ | |
310 | #define CHARSET_MAX_IDX (15) | |
311 | ||
312 | /* And several more macros to be used frequently. */ | |
313 | #define CHARSET_BYTES(charset) \ | |
314 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_BYTES_IDX)) | |
315 | #define CHARSET_DIMENSION(charset) \ | |
316 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_DIMENSION_IDX)) | |
317 | #define CHARSET_CHARS(charset) \ | |
318 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_CHARS_IDX)) | |
319 | #define CHARSET_WIDTH(charset) \ | |
320 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_WIDTH_IDX)) | |
321 | #define CHARSET_DIRECTION(charset) \ | |
322 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_DIRECTION_IDX)) | |
323 | #define CHARSET_LEADING_CODE_BASE(charset) \ | |
324 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_LEADING_CODE_BASE_IDX)) | |
325 | #define CHARSET_LEADING_CODE_EXT(charset) \ | |
326 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_LEADING_CODE_EXT_IDX)) | |
327 | #define CHARSET_ISO_FINAL_CHAR(charset) \ | |
6e4dc3e1 | 328 | XINT (CHARSET_TABLE_INFO (charset, CHARSET_ISO_FINAL_CHAR_IDX)) |
4ed46869 | 329 | #define CHARSET_ISO_GRAPHIC_PLANE(charset) \ |
6e4dc3e1 | 330 | XINT (CHARSET_TABLE_INFO (charset, CHARSET_ISO_GRAPHIC_PLANE_IDX)) |
4ed46869 KH |
331 | #define CHARSET_REVERSE_CHARSET(charset) \ |
332 | XINT (CHARSET_TABLE_INFO (charset, CHARSET_REVERSE_CHARSET_IDX)) | |
333 | ||
334 | /* Macros to specify direction of a charset. */ | |
335 | #define CHARSET_DIRECTION_LEFT_TO_RIGHT 0 | |
336 | #define CHARSET_DIRECTION_RIGHT_TO_LEFT 1 | |
337 | ||
338 | /* A vector of charset symbol indexed by charset-id. This is used | |
339 | only for returning charset symbol from C functions. */ | |
340 | extern Lisp_Object Vcharset_symbol_table; | |
341 | ||
342 | /* Return symbol of CHARSET. */ | |
343 | #define CHARSET_SYMBOL(charset) \ | |
344 | XVECTOR (Vcharset_symbol_table)->contents[charset] | |
345 | ||
384107f2 | 346 | /* 1 if CHARSET is in valid value range, else 0. */ |
4ed46869 KH |
347 | #define CHARSET_VALID_P(charset) \ |
348 | ((charset) == 0 \ | |
f49b37c9 | 349 | || ((charset) > 0x80 && (charset) <= MAX_CHARSET_OFFICIAL_DIMENSION2) \ |
6e4dc3e1 KH |
350 | || ((charset) >= MIN_CHARSET_PRIVATE_DIMENSION1 \ |
351 | && (charset) <= MAX_CHARSET) \ | |
352 | || ((charset) == CHARSET_8_BIT_CONTROL) \ | |
353 | || ((charset) == CHARSET_8_BIT_GRAPHIC)) | |
4ed46869 | 354 | |
f49b37c9 | 355 | /* 1 if CHARSET is already defined, else 0. */ |
4ed46869 | 356 | #define CHARSET_DEFINED_P(charset) \ |
03e66c53 | 357 | (((charset) >= 0) && ((charset) <= MAX_CHARSET) \ |
4ed46869 KH |
358 | && !NILP (CHARSET_TABLE_ENTRY (charset))) |
359 | ||
360 | /* Since the information CHARSET-BYTES and CHARSET-WIDTH of | |
6e4dc3e1 | 361 | Vcharset_table can be retrieved only by the first byte of |
4ed46869 KH |
362 | multi-byte form (an ASCII code or a base leading-code), we provide |
363 | here tables to be used by macros BYTES_BY_CHAR_HEAD and | |
364 | WIDTH_BY_CHAR_HEAD for faster information retrieval. */ | |
365 | extern int bytes_by_char_head[256]; | |
366 | extern int width_by_char_head[256]; | |
367 | ||
6e4dc3e1 KH |
368 | #define BYTES_BY_CHAR_HEAD(char_head) \ |
369 | (ASCII_BYTE_P (char_head) ? 1 : bytes_by_char_head[char_head]) | |
370 | #define WIDTH_BY_CHAR_HEAD(char_head) \ | |
371 | (ASCII_BYTE_P (char_head) ? 1 : width_by_char_head[char_head]) | |
4ed46869 KH |
372 | |
373 | /* Charset of the character C. */ | |
6e4dc3e1 KH |
374 | #define CHAR_CHARSET(c) \ |
375 | (SINGLE_BYTE_CHAR_P (c) \ | |
376 | ? (ASCII_BYTE_P (c) \ | |
377 | ? CHARSET_ASCII \ | |
378 | : (c) < 0xA0 ? CHARSET_8_BIT_CONTROL : CHARSET_8_BIT_GRAPHIC) \ | |
379 | : ((c) < MIN_CHAR_OFFICIAL_DIMENSION2 \ | |
380 | ? CHAR_FIELD2 (c) + 0x70 \ | |
381 | : ((c) < MIN_CHAR_PRIVATE_DIMENSION2 \ | |
382 | ? CHAR_FIELD1 (c) + 0x8F \ | |
f49b37c9 | 383 | : CHAR_FIELD1 (c) + 0xE0))) |
4ed46869 | 384 | |
f49b37c9 | 385 | /* Check if two characters C1 and C2 belong to the same charset. */ |
6e4dc3e1 KH |
386 | #define SAME_CHARSET_P(c1, c2) \ |
387 | (c1 < MIN_CHAR_OFFICIAL_DIMENSION2 \ | |
388 | ? (c1 & CHAR_FIELD2_MASK) == (c2 & CHAR_FIELD2_MASK) \ | |
389 | : (c1 & CHAR_FIELD1_MASK) == (c2 & CHAR_FIELD1_MASK)) | |
4ed46869 KH |
390 | |
391 | /* Return a character of which charset is CHARSET and position-codes | |
392 | are C1 and C2. DIMENSION1 character ignores C2. */ | |
6e4dc3e1 KH |
393 | #define MAKE_CHAR(charset, c1, c2) \ |
394 | ((charset) == CHARSET_ASCII \ | |
395 | ? (c1) & 0x7F \ | |
396 | : (((charset) == CHARSET_8_BIT_CONTROL \ | |
397 | || (charset) == CHARSET_8_BIT_GRAPHIC) \ | |
398 | ? ((c1) & 0x7F) | 0x80 \ | |
f164d9b5 KH |
399 | : ((CHARSET_DEFINED_P (charset) \ |
400 | ? CHARSET_DIMENSION (charset) == 1 \ | |
401 | : (charset) < MIN_CHARSET_PRIVATE_DIMENSION2) \ | |
2cd31e75 | 402 | ? (((charset) - 0x70) << 7) | ((c1) <= 0 ? 0 : ((c1) & 0x7F)) \ |
6e4dc3e1 KH |
403 | : ((((charset) \ |
404 | - ((charset) < MIN_CHARSET_PRIVATE_DIMENSION2 ? 0x8F : 0xE0)) \ | |
405 | << 14) \ | |
406 | | ((c2) <= 0 ? 0 : ((c2) & 0x7F)) \ | |
407 | | ((c1) <= 0 ? 0 : (((c1) & 0x7F) << 7)))))) | |
408 | ||
4ed46869 | 409 | |
15979e9e KH |
410 | /* If GENERICP is nonzero, return nonzero iff C is a valid normal or |
411 | generic character. If GENERICP is zero, return nonzero iff C is a | |
412 | valid normal character. */ | |
413 | #define CHAR_VALID_P(c, genericp) \ | |
414 | ((c) >= 0 \ | |
415 | && (SINGLE_BYTE_CHAR_P (c) || char_valid_p (c, genericp))) | |
c6112b99 | 416 | |
d74d0ca5 | 417 | /* This default value is used when nonascii-translation-table or |
54e15bb9 KH |
418 | nonascii-insert-offset fail to convert unibyte character to a valid |
419 | multibyte character. This makes a Latin-1 character. */ | |
420 | ||
421 | #define DEFAULT_NONASCII_INSERT_OFFSET 0x800 | |
422 | ||
6e4dc3e1 KH |
423 | /* Parse multibyte string STR of length LENGTH and set BYTES to the |
424 | byte length of a character at STR. */ | |
425 | ||
426 | #ifdef BYTE_COMBINING_DEBUG | |
384107f2 KH |
427 | |
428 | #define PARSE_MULTIBYTE_SEQ(str, length, bytes) \ | |
429 | do { \ | |
430 | int i = 1; \ | |
f49b37c9 | 431 | while (i < (length) && ! CHAR_HEAD_P ((str)[i])) i++; \ |
6e4dc3e1 KH |
432 | (bytes) = BYTES_BY_CHAR_HEAD ((str)[0]); \ |
433 | if ((bytes) > i) \ | |
434 | abort (); \ | |
384107f2 | 435 | } while (0) |
54e15bb9 | 436 | |
6e4dc3e1 | 437 | #else /* not BYTE_COMBINING_DEBUG */ |
feb453fa | 438 | |
6e4dc3e1 | 439 | #define PARSE_MULTIBYTE_SEQ(str, length, bytes) \ |
304f9d2a | 440 | ((void)(length), (bytes) = BYTES_BY_CHAR_HEAD ((str)[0])) |
feb453fa | 441 | |
6e4dc3e1 KH |
442 | #endif /* not BYTE_COMBINING_DEBUG */ |
443 | ||
1efcd78f KH |
444 | #define VALID_LEADING_CODE_P(code) \ |
445 | (! NILP (CHARSET_TABLE_ENTRY (code))) | |
446 | ||
6e4dc3e1 KH |
447 | /* Return 1 iff the byte sequence at unibyte string STR (LENGTH bytes) |
448 | is valid as a multibyte form. If valid, by a side effect, BYTES is | |
449 | set to the byte length of the multibyte form. */ | |
450 | ||
1efcd78f KH |
451 | #define UNIBYTE_STR_AS_MULTIBYTE_P(str, length, bytes) \ |
452 | (((str)[0] < 0x80 || (str)[0] >= 0xA0) \ | |
453 | ? ((bytes) = 1) \ | |
454 | : (((bytes) = BYTES_BY_CHAR_HEAD ((str)[0])), \ | |
455 | ((bytes) <= (length) \ | |
456 | && !CHAR_HEAD_P ((str)[1]) \ | |
457 | && ((bytes) == 2 \ | |
458 | ? (str)[0] != LEADING_CODE_8_BIT_CONTROL \ | |
459 | : (!CHAR_HEAD_P ((str)[2]) \ | |
460 | && ((bytes) == 3 \ | |
461 | ? (((str)[0] != LEADING_CODE_PRIVATE_11 \ | |
462 | && (str)[0] != LEADING_CODE_PRIVATE_12) \ | |
463 | || VALID_LEADING_CODE_P (str[1])) \ | |
464 | : (!CHAR_HEAD_P ((str)[3]) \ | |
465 | && VALID_LEADING_CODE_P (str[1])))))))) | |
466 | ||
6e4dc3e1 KH |
467 | |
468 | /* Return 1 iff the byte sequence at multibyte string STR is valid as | |
469 | a unibyte form. By a side effect, BYTES is set to the byte length | |
470 | of one character at STR. */ | |
471 | ||
472 | #define MULTIBYTE_STR_AS_UNIBYTE_P(str, bytes) \ | |
473 | ((bytes) = BYTES_BY_CHAR_HEAD ((str)[0]), \ | |
474 | (str)[0] != LEADING_CODE_8_BIT_CONTROL) | |
4ed46869 | 475 | |
feb453fa RS |
476 | /* The charset of character C is stored in CHARSET, and the |
477 | position-codes of C are stored in C1 and C2. | |
9dd2aa1a | 478 | We store -1 in C2 if the dimension of the charset is 1. */ |
feb453fa | 479 | |
f164d9b5 KH |
480 | #define SPLIT_CHAR(c, charset, c1, c2) \ |
481 | (SINGLE_BYTE_CHAR_P (c) \ | |
482 | ? ((charset \ | |
483 | = (ASCII_BYTE_P (c) \ | |
484 | ? CHARSET_ASCII \ | |
485 | : ((c) < 0xA0 ? CHARSET_8_BIT_CONTROL : CHARSET_8_BIT_GRAPHIC))), \ | |
486 | c1 = (c), c2 = -1) \ | |
487 | : ((c) & CHAR_FIELD1_MASK \ | |
488 | ? (charset = (CHAR_FIELD1 (c) \ | |
489 | + ((c) < MIN_CHAR_PRIVATE_DIMENSION2 ? 0x8F : 0xE0)), \ | |
490 | c1 = CHAR_FIELD2 (c), \ | |
491 | c2 = CHAR_FIELD3 (c)) \ | |
492 | : (charset = CHAR_FIELD2 (c) + 0x70, \ | |
493 | c1 = CHAR_FIELD3 (c), \ | |
6e4dc3e1 | 494 | c2 = -1))) |
4ed46869 | 495 | |
384107f2 | 496 | /* Return 1 iff character C has valid printable glyph. */ |
6e4dc3e1 | 497 | #define CHAR_PRINTABLE_P(c) (ASCII_BYTE_P (c) || char_printable_p (c)) |
384107f2 | 498 | |
feb453fa RS |
499 | /* The charset of the character at STR is stored in CHARSET, and the |
500 | position-codes are stored in C1 and C2. | |
f49b37c9 | 501 | We store -1 in C2 if the character is just 2 bytes. */ |
feb453fa | 502 | |
f49b37c9 KH |
503 | #define SPLIT_STRING(str, len, charset, c1, c2) \ |
504 | ((BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) < 2 \ | |
505 | || BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) > len \ | |
506 | || split_string (str, len, &charset, &c1, &c2) < 0) \ | |
507 | ? c1 = *(str), charset = CHARSET_ASCII \ | |
4ed46869 KH |
508 | : charset) |
509 | ||
4ed46869 KH |
510 | /* Mapping table from ISO2022's charset (specified by DIMENSION, |
511 | CHARS, and FINAL_CHAR) to Emacs' charset. Should be accessed by | |
512 | macro ISO_CHARSET_TABLE (DIMENSION, CHARS, FINAL_CHAR). */ | |
513 | extern int iso_charset_table[2][2][128]; | |
514 | ||
515 | #define ISO_CHARSET_TABLE(dimension, chars, final_char) \ | |
516 | iso_charset_table[XINT (dimension) - 1][XINT (chars) > 94][XINT (final_char)] | |
517 | ||
518 | #define BASE_LEADING_CODE_P(c) (BYTES_BY_CHAR_HEAD ((unsigned char) (c)) > 1) | |
519 | ||
3124bc0e | 520 | /* Return how many bytes C will occupy in a multibyte buffer. */ |
6e4dc3e1 KH |
521 | #define CHAR_BYTES(c) \ |
522 | (SINGLE_BYTE_CHAR_P (c) \ | |
523 | ? ((ASCII_BYTE_P (c) || (c) >= 0xA0) ? 1 : 2) \ | |
524 | : char_bytes (c)) | |
3124bc0e | 525 | |
4ed46869 | 526 | /* The following two macros CHAR_STRING and STRING_CHAR are the main |
d8e4f486 | 527 | entry points to convert between Emacs's two types of character |
4ed46869 KH |
528 | representations: multi-byte form and single-word form (character |
529 | code). */ | |
530 | ||
f49b37c9 | 531 | /* Store multi-byte form of the character C in STR. The caller should |
6e4dc3e1 KH |
532 | allocate at least MAX_MULTIBYTE_LENGTH bytes area at STR in |
533 | advance. Returns the length of the multi-byte form. If C is an | |
534 | invalid character code, signal an error. */ | |
4ed46869 | 535 | |
e10ae834 KH |
536 | #define CHAR_STRING(c, str) \ |
537 | (SINGLE_BYTE_CHAR_P (c) \ | |
538 | ? ((ASCII_BYTE_P (c) || c >= 0xA0) \ | |
539 | ? (*(str) = (unsigned char)(c), 1) \ | |
540 | : (*(str) = LEADING_CODE_8_BIT_CONTROL, *((str)+ 1) = c + 0x20, 2)) \ | |
6e4dc3e1 | 541 | : char_to_string (c, (unsigned char *) str)) |
4ed46869 | 542 | |
e06aa1f9 GM |
543 | /* Like CHAR_STRING but don't signal an error if C is invalid. |
544 | Value is -1 in this case. */ | |
545 | ||
546 | #define CHAR_STRING_NO_SIGNAL(c, str) \ | |
547 | (SINGLE_BYTE_CHAR_P (c) \ | |
548 | ? ((ASCII_BYTE_P (c) || c >= 0xA0) \ | |
549 | ? (*(str) = (unsigned char)(c), 1) \ | |
550 | : (*(str) = LEADING_CODE_8_BIT_CONTROL, *((str)+ 1) = c + 0x20, 2)) \ | |
551 | : char_to_string_1 (c, (unsigned char *) str)) | |
552 | ||
4ed46869 KH |
553 | /* Return a character code of the character of which multi-byte form |
554 | is at STR and the length is LEN. If STR doesn't contain valid | |
555 | multi-byte form, only the first byte in STR is returned. */ | |
556 | ||
dfd57aa7 KH |
557 | #define STRING_CHAR(str, len) \ |
558 | (BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) == 1 \ | |
559 | ? (unsigned char) *(str) \ | |
f49b37c9 | 560 | : string_to_char (str, len, 0)) |
4ed46869 | 561 | |
384107f2 KH |
562 | /* This is like STRING_CHAR but the third arg ACTUAL_LEN is set to the |
563 | length of the multi-byte form. Just to know the length, use | |
4ed46869 KH |
564 | MULTIBYTE_FORM_LENGTH. */ |
565 | ||
384107f2 KH |
566 | #define STRING_CHAR_AND_LENGTH(str, len, actual_len) \ |
567 | (BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) == 1 \ | |
568 | ? ((actual_len) = 1), (unsigned char) *(str) \ | |
f49b37c9 | 569 | : string_to_char (str, len, &(actual_len))) |
d74d0ca5 | 570 | |
6e4dc3e1 KH |
571 | /* Fetch the "next" character from Lisp string STRING at byte position |
572 | BYTEIDX, character position CHARIDX. Store it into OUTPUT. | |
520afed1 RS |
573 | |
574 | All the args must be side-effect-free. | |
575 | BYTEIDX and CHARIDX must be lvalues; | |
576 | we increment them past the character fetched. */ | |
577 | ||
6e4dc3e1 KH |
578 | #define FETCH_STRING_CHAR_ADVANCE(OUTPUT, STRING, CHARIDX, BYTEIDX) \ |
579 | if (1) \ | |
580 | { \ | |
581 | CHARIDX++; \ | |
582 | if (STRING_MULTIBYTE (STRING)) \ | |
583 | { \ | |
8a25217a | 584 | const unsigned char *ptr = SDATA (STRING) + BYTEIDX; \ |
9f5348e3 | 585 | int space_left = SBYTES (STRING) - BYTEIDX; \ |
6e4dc3e1 KH |
586 | int actual_len; \ |
587 | \ | |
588 | OUTPUT = STRING_CHAR_AND_LENGTH (ptr, space_left, actual_len); \ | |
589 | BYTEIDX += actual_len; \ | |
590 | } \ | |
591 | else \ | |
d5db4077 | 592 | OUTPUT = SREF (STRING, BYTEIDX++); \ |
6e4dc3e1 KH |
593 | } \ |
594 | else | |
595 | ||
596 | /* Like FETCH_STRING_CHAR_ADVANCE but assume STRING is multibyte. */ | |
597 | ||
598 | #define FETCH_STRING_CHAR_ADVANCE_NO_CHECK(OUTPUT, STRING, CHARIDX, BYTEIDX) \ | |
520afed1 RS |
599 | if (1) \ |
600 | { \ | |
8a25217a | 601 | const unsigned char *fetch_string_char_ptr = SDATA (STRING) + BYTEIDX; \ |
9f5348e3 | 602 | int fetch_string_char_space_left = SBYTES (STRING) - BYTEIDX; \ |
520afed1 RS |
603 | int actual_len; \ |
604 | \ | |
605 | OUTPUT \ | |
606 | = STRING_CHAR_AND_LENGTH (fetch_string_char_ptr, \ | |
607 | fetch_string_char_space_left, actual_len); \ | |
608 | \ | |
609 | BYTEIDX += actual_len; \ | |
610 | CHARIDX++; \ | |
611 | } \ | |
612 | else | |
613 | ||
6e4dc3e1 KH |
614 | /* Like FETCH_STRING_CHAR_ADVANCE but fetch character from the current |
615 | buffer. */ | |
f49b37c9 KH |
616 | |
617 | #define FETCH_CHAR_ADVANCE(OUTPUT, CHARIDX, BYTEIDX) \ | |
618 | if (1) \ | |
619 | { \ | |
f49b37c9 | 620 | CHARIDX++; \ |
6e4dc3e1 KH |
621 | if (!NILP (current_buffer->enable_multibyte_characters)) \ |
622 | { \ | |
623 | unsigned char *ptr = BYTE_POS_ADDR (BYTEIDX); \ | |
624 | int space_left = ((CHARIDX < GPT ? GPT_BYTE : Z_BYTE) - BYTEIDX); \ | |
625 | int actual_len; \ | |
626 | \ | |
627 | OUTPUT= STRING_CHAR_AND_LENGTH (ptr, space_left, actual_len); \ | |
628 | BYTEIDX += actual_len; \ | |
629 | } \ | |
630 | else \ | |
631 | { \ | |
632 | OUTPUT = *(BYTE_POS_ADDR (BYTEIDX)); \ | |
633 | BYTEIDX++; \ | |
634 | } \ | |
f49b37c9 KH |
635 | } \ |
636 | else | |
637 | ||
4ed46869 KH |
638 | /* Return the length of the multi-byte form at string STR of length LEN. */ |
639 | ||
d121936f KH |
640 | #define MULTIBYTE_FORM_LENGTH(str, len) \ |
641 | (BYTES_BY_CHAR_HEAD (*(unsigned char *)(str)) == 1 \ | |
642 | ? 1 \ | |
4ed46869 KH |
643 | : multibyte_form_length (str, len)) |
644 | ||
d3985b78 KH |
645 | /* If P is before LIMIT, advance P to the next character boundary. It |
646 | assumes that P is already at a character boundary of the sane | |
647 | mulitbyte form whose end address is LIMIT. */ | |
648 | ||
649 | #define NEXT_CHAR_BOUNDARY(p, limit) \ | |
650 | do { \ | |
651 | if ((p) < (limit)) \ | |
652 | (p) += BYTES_BY_CHAR_HEAD (*(p)); \ | |
653 | } while (0) | |
654 | ||
655 | ||
656 | /* If P is after LIMIT, advance P to the previous character boundary. | |
657 | It assumes that P is already at a character boundary of the sane | |
658 | mulitbyte form whose beginning address is LIMIT. */ | |
659 | ||
660 | #define PREV_CHAR_BOUNDARY(p, limit) \ | |
661 | do { \ | |
662 | if ((p) > (limit)) \ | |
663 | { \ | |
664 | const unsigned char *p0 = (p); \ | |
665 | do { \ | |
666 | p0--; \ | |
667 | } while (p0 >= limit && ! CHAR_HEAD_P (*p0)); \ | |
668 | (p) = (BYTES_BY_CHAR_HEAD (*p0) == (p) - p0) ? p0 : (p) - 1; \ | |
669 | } \ | |
670 | } while (0) | |
671 | ||
672 | ||
4ed46869 KH |
673 | #ifdef emacs |
674 | ||
384107f2 KH |
675 | /* Increase the buffer byte position POS_BYTE of the current buffer to |
676 | the next character boundary. This macro relies on the fact that | |
677 | *GPT_ADDR and *Z_ADDR are always accessible and the values are | |
678 | '\0'. No range checking of POS. */ | |
6e4dc3e1 KH |
679 | |
680 | #ifdef BYTE_COMBINING_DEBUG | |
681 | ||
384107f2 KH |
682 | #define INC_POS(pos_byte) \ |
683 | do { \ | |
684 | unsigned char *p = BYTE_POS_ADDR (pos_byte); \ | |
685 | if (BASE_LEADING_CODE_P (*p)) \ | |
686 | { \ | |
687 | int len, bytes; \ | |
688 | len = Z_BYTE - pos_byte; \ | |
689 | PARSE_MULTIBYTE_SEQ (p, len, bytes); \ | |
690 | pos_byte += bytes; \ | |
691 | } \ | |
692 | else \ | |
693 | pos_byte++; \ | |
4ed46869 KH |
694 | } while (0) |
695 | ||
6e4dc3e1 KH |
696 | #else /* not BYTE_COMBINING_DEBUG */ |
697 | ||
698 | #define INC_POS(pos_byte) \ | |
699 | do { \ | |
700 | unsigned char *p = BYTE_POS_ADDR (pos_byte); \ | |
701 | pos_byte += BYTES_BY_CHAR_HEAD (*p); \ | |
702 | } while (0) | |
703 | ||
704 | #endif /* not BYTE_COMBINING_DEBUG */ | |
705 | ||
384107f2 KH |
706 | /* Decrease the buffer byte position POS_BYTE of the current buffer to |
707 | the previous character boundary. No range checking of POS. */ | |
708 | #define DEC_POS(pos_byte) \ | |
709 | do { \ | |
710 | unsigned char *p, *p_min; \ | |
711 | \ | |
712 | pos_byte--; \ | |
713 | if (pos_byte < GPT_BYTE) \ | |
02dcfd84 | 714 | p = BEG_ADDR + pos_byte - BEG_BYTE, p_min = BEG_ADDR; \ |
384107f2 | 715 | else \ |
02dcfd84 | 716 | p = BEG_ADDR + GAP_SIZE + pos_byte - BEG_BYTE, p_min = GAP_END_ADDR;\ |
384107f2 KH |
717 | if (p > p_min && !CHAR_HEAD_P (*p)) \ |
718 | { \ | |
719 | unsigned char *pend = p--; \ | |
720 | int len, bytes; \ | |
02dcfd84 SM |
721 | if (p_min < p - MAX_MULTIBYTE_LENGTH) \ |
722 | p_min = p - MAX_MULTIBYTE_LENGTH; \ | |
384107f2 KH |
723 | while (p > p_min && !CHAR_HEAD_P (*p)) p--; \ |
724 | len = pend + 1 - p; \ | |
725 | PARSE_MULTIBYTE_SEQ (p, len, bytes); \ | |
726 | if (bytes == len) \ | |
727 | pos_byte -= len - 1; \ | |
728 | } \ | |
c399b461 RS |
729 | } while (0) |
730 | ||
731 | /* Increment both CHARPOS and BYTEPOS, each in the appropriate way. */ | |
732 | ||
d619ee06 RS |
733 | #define INC_BOTH(charpos, bytepos) \ |
734 | do \ | |
735 | { \ | |
736 | (charpos)++; \ | |
737 | if (NILP (current_buffer->enable_multibyte_characters)) \ | |
738 | (bytepos)++; \ | |
739 | else \ | |
740 | INC_POS ((bytepos)); \ | |
741 | } \ | |
c399b461 RS |
742 | while (0) |
743 | ||
744 | /* Decrement both CHARPOS and BYTEPOS, each in the appropriate way. */ | |
745 | ||
d619ee06 RS |
746 | #define DEC_BOTH(charpos, bytepos) \ |
747 | do \ | |
748 | { \ | |
749 | (charpos)--; \ | |
750 | if (NILP (current_buffer->enable_multibyte_characters)) \ | |
751 | (bytepos)--; \ | |
752 | else \ | |
753 | DEC_POS ((bytepos)); \ | |
754 | } \ | |
c399b461 RS |
755 | while (0) |
756 | ||
384107f2 KH |
757 | /* Increase the buffer byte position POS_BYTE of the current buffer to |
758 | the next character boundary. This macro relies on the fact that | |
759 | *GPT_ADDR and *Z_ADDR are always accessible and the values are | |
760 | '\0'. No range checking of POS_BYTE. */ | |
6e4dc3e1 KH |
761 | |
762 | #ifdef BYTE_COMBINING_DEBUG | |
763 | ||
384107f2 KH |
764 | #define BUF_INC_POS(buf, pos_byte) \ |
765 | do { \ | |
766 | unsigned char *p = BUF_BYTE_ADDRESS (buf, pos_byte); \ | |
767 | if (BASE_LEADING_CODE_P (*p)) \ | |
bb5999ae | 768 | { \ |
384107f2 KH |
769 | int len, bytes; \ |
770 | len = BUF_Z_BYTE (buf) - pos_byte; \ | |
771 | PARSE_MULTIBYTE_SEQ (p, len, bytes); \ | |
772 | pos_byte += bytes; \ | |
bb5999ae | 773 | } \ |
384107f2 KH |
774 | else \ |
775 | pos_byte++; \ | |
776 | } while (0) | |
777 | ||
6e4dc3e1 KH |
778 | #else /* not BYTE_COMBINING_DEBUG */ |
779 | ||
780 | #define BUF_INC_POS(buf, pos_byte) \ | |
781 | do { \ | |
782 | unsigned char *p = BUF_BYTE_ADDRESS (buf, pos_byte); \ | |
783 | pos_byte += BYTES_BY_CHAR_HEAD (*p); \ | |
784 | } while (0) | |
785 | ||
786 | #endif /* not BYTE_COMBINING_DEBUG */ | |
787 | ||
384107f2 KH |
788 | /* Decrease the buffer byte position POS_BYTE of the current buffer to |
789 | the previous character boundary. No range checking of POS_BYTE. */ | |
790 | #define BUF_DEC_POS(buf, pos_byte) \ | |
791 | do { \ | |
792 | unsigned char *p, *p_min; \ | |
793 | pos_byte--; \ | |
794 | if (pos_byte < BUF_GPT_BYTE (buf)) \ | |
795 | { \ | |
02dcfd84 | 796 | p = BUF_BEG_ADDR (buf) + pos_byte - BEG_BYTE; \ |
384107f2 KH |
797 | p_min = BUF_BEG_ADDR (buf); \ |
798 | } \ | |
799 | else \ | |
800 | { \ | |
02dcfd84 | 801 | p = BUF_BEG_ADDR (buf) + BUF_GAP_SIZE (buf) + pos_byte - BEG_BYTE;\ |
384107f2 KH |
802 | p_min = BUF_GAP_END_ADDR (buf); \ |
803 | } \ | |
804 | if (p > p_min && !CHAR_HEAD_P (*p)) \ | |
805 | { \ | |
806 | unsigned char *pend = p--; \ | |
807 | int len, bytes; \ | |
02dcfd84 SM |
808 | if (p_min < p - MAX_MULTIBYTE_LENGTH) \ |
809 | p_min = p - MAX_MULTIBYTE_LENGTH; \ | |
384107f2 KH |
810 | while (p > p_min && !CHAR_HEAD_P (*p)) p--; \ |
811 | len = pend + 1 - p; \ | |
812 | PARSE_MULTIBYTE_SEQ (p, len, bytes); \ | |
813 | if (bytes == len) \ | |
814 | pos_byte -= len - 1; \ | |
815 | } \ | |
4ed46869 KH |
816 | } while (0) |
817 | ||
818 | #endif /* emacs */ | |
819 | ||
f49b37c9 KH |
820 | /* This is the maximum byte length of multi-byte sequence. */ |
821 | #define MAX_MULTIBYTE_LENGTH 4 | |
4ed46869 | 822 | |
bb5999ae KH |
823 | extern void invalid_character P_ ((int)); |
824 | ||
62c6686f | 825 | extern int translate_char P_ ((Lisp_Object, int, int, int, int)); |
f49b37c9 | 826 | extern int split_string P_ ((const unsigned char *, int, int *, |
c04809fb | 827 | unsigned char *, unsigned char *)); |
f49b37c9 | 828 | extern int char_to_string P_ ((int, unsigned char *)); |
e06aa1f9 | 829 | extern int char_to_string_1 P_ ((int, unsigned char *)); |
f49b37c9 | 830 | extern int string_to_char P_ ((const unsigned char *, int, int *)); |
384107f2 | 831 | extern int char_printable_p P_ ((int c)); |
8867de67 | 832 | extern int multibyte_form_length P_ ((const unsigned char *, int)); |
8a25217a KR |
833 | extern void parse_str_as_multibyte P_ ((const unsigned char *, int, int *, |
834 | int *)); | |
6e4dc3e1 | 835 | extern int str_as_multibyte P_ ((unsigned char *, int, int, int *)); |
347abaf7 | 836 | extern int parse_str_to_multibyte P_ ((unsigned char *, int)); |
6e4dc3e1 KH |
837 | extern int str_to_multibyte P_ ((unsigned char *, int, int)); |
838 | extern int str_as_unibyte P_ ((unsigned char *, int)); | |
c04809fb | 839 | extern int get_charset_id P_ ((Lisp_Object)); |
8a25217a | 840 | extern int find_charset_in_text P_ ((const unsigned char *, int, int, int *, |
6e4dc3e1 | 841 | Lisp_Object)); |
c04809fb | 842 | extern int strwidth P_ ((unsigned char *, int)); |
8a25217a | 843 | extern int c_string_width P_ ((const unsigned char *, int, int, int *, int *)); |
417ef8f6 | 844 | extern int lisp_string_width P_ ((Lisp_Object, int, int *, int *)); |
3124bc0e | 845 | extern int char_bytes P_ ((int)); |
c2d1e590 | 846 | extern int char_valid_p P_ ((int, int)); |
2db95897 | 847 | |
9028b39e SM |
848 | EXFUN (Funibyte_char_to_multibyte, 1); |
849 | ||
d74d0ca5 | 850 | extern Lisp_Object Vtranslation_table_vector; |
62c6686f | 851 | |
d74d0ca5 | 852 | /* Return a translation table of id number ID. */ |
62c6686f | 853 | #define GET_TRANSLATION_TABLE(id) \ |
e35efe89 | 854 | (XCDR(XVECTOR(Vtranslation_table_vector)->contents[(id)])) |
c1f6608b | 855 | |
69535a4b KH |
856 | /* A char-table for characters which may invoke auto-filling. */ |
857 | extern Lisp_Object Vauto_fill_chars; | |
858 | ||
c1f6608b KH |
859 | /* Copy LEN bytes from FROM to TO. This macro should be used only |
860 | when a caller knows that LEN is short and the obvious copy loop is | |
6e4dc3e1 KH |
861 | faster than calling bcopy which has some overhead. Copying a |
862 | multibyte sequence of a multibyte character is the typical case. */ | |
c1f6608b KH |
863 | |
864 | #define BCOPY_SHORT(from, to, len) \ | |
865 | do { \ | |
866 | int i = len; \ | |
a9fb257e KR |
867 | const unsigned char *from_p = from; \ |
868 | unsigned char *to_p = to; \ | |
6e4dc3e1 | 869 | while (i--) *to_p++ = *from_p++; \ |
c1f6608b KH |
870 | } while (0) |
871 | ||
aa01a892 | 872 | #endif /* EMACS_CHARSET_H */ |