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f49b37c9 | 1 | /* Header for multibyte character handler. |
aaef169d | 2 | Copyright (C) 2001, 2002, 2003, 2004, 2005, |
4e6835db | 3 | 2006, 2007 Free Software Foundation, Inc. |
7976eda0 | 4 | Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
4e6835db | 5 | 2005, 2006, 2007 |
ce03bf76 KH |
6 | National Institute of Advanced Industrial Science and Technology (AIST) |
7 | Registration Number H14PRO021 | |
4ed46869 | 8 | |
369314dc KH |
9 | This file is part of GNU Emacs. |
10 | ||
11 | GNU Emacs is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
1427aa65 | 13 | the Free Software Foundation; either version 3, or (at your option) |
369314dc | 14 | any later version. |
4ed46869 | 15 | |
369314dc KH |
16 | GNU Emacs is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
4ed46869 | 20 | |
369314dc KH |
21 | You should have received a copy of the GNU General Public License |
22 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
23 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
24 | Boston, MA 02110-1301, USA. */ | |
4ed46869 | 25 | |
aa01a892 KH |
26 | #ifndef EMACS_CHARSET_H |
27 | #define EMACS_CHARSET_H | |
4ed46869 | 28 | |
6e4dc3e1 KH |
29 | /* #define BYTE_COMBINING_DEBUG */ |
30 | ||
4ed46869 KH |
31 | /*** GENERAL NOTE on CHARACTER SET (CHARSET) *** |
32 | ||
33 | A character set ("charset" hereafter) is a meaningful collection | |
34 | (i.e. language, culture, functionality, etc) of characters. Emacs | |
35 | handles multiple charsets at once. Each charset corresponds to one | |
d8e4f486 | 36 | of the ISO charsets. Emacs identifies a charset by a unique |
f49b37c9 KH |
37 | identification number, whereas ISO identifies a charset by a triplet |
38 | of DIMENSION, CHARS and FINAL-CHAR. So, hereafter, just saying | |
39 | "charset" means an identification number (integer value). | |
4ed46869 | 40 | |
d8e4f486 | 41 | The value range of charsets is 0x00, 0x81..0xFE. There are four |
4ed46869 KH |
42 | kinds of charset depending on DIMENSION (1 or 2) and CHARS (94 or |
43 | 96). For instance, a charset of DIMENSION2_CHARS94 contains 94x94 | |
f49b37c9 | 44 | characters. |
4ed46869 KH |
45 | |
46 | Within Emacs Lisp, a charset is treated as a symbol which has a | |
47 | property `charset'. The property value is a vector containing | |
d8e4f486 | 48 | various information about the charset. For readability of C code, |
f49b37c9 | 49 | we use the following convention for C variable names: |
4ed46869 KH |
50 | charset_symbol: Emacs Lisp symbol of a charset |
51 | charset_id: Emacs Lisp integer of an identification number of a charset | |
52 | charset: C integer of an identification number of a charset | |
53 | ||
6e4dc3e1 KH |
54 | Each charset (except for ascii) is assigned a base leading-code |
55 | (range 0x80..0x9E). In addition, a charset of greater than 0xA0 | |
4ed46869 KH |
56 | (whose base leading-code is 0x9A..0x9D) is assigned an extended |
57 | leading-code (range 0xA0..0xFE). In this case, each base | |
d8e4f486 DL |
58 | leading-code specifies the allowable range of extended leading-code |
59 | as shown in the table below. A leading-code is used to represent a | |
4ed46869 KH |
60 | character in Emacs' buffer and string. |
61 | ||
d8e4f486 | 62 | We call a charset which has extended leading-code a "private |
f49b37c9 | 63 | charset" because those are mainly for a charset which is not yet |
4ed46869 | 64 | registered by ISO. On the contrary, we call a charset which does |
d8e4f486 | 65 | not have extended leading-code an "official charset". |
4ed46869 KH |
66 | |
67 | --------------------------------------------------------------------------- | |
68 | charset dimension base leading-code extended leading-code | |
69 | --------------------------------------------------------------------------- | |
70 | 0x00 official dim1 -- none -- -- none -- | |
71 | (ASCII) | |
72 | 0x01..0x7F --never used-- | |
88b837a2 KH |
73 | 0x80 official dim1 -- none -- -- none -- |
74 | (eight-bit-graphic) | |
4ed46869 KH |
75 | 0x81..0x8F official dim1 same as charset -- none -- |
76 | 0x90..0x99 official dim2 same as charset -- none -- | |
6e4dc3e1 KH |
77 | 0x9A..0x9D --never used-- |
78 | 0x9E official dim1 same as charset -- none -- | |
79 | (eight-bit-control) | |
88b837a2 | 80 | 0x9F --never used-- |
4ed46869 KH |
81 | 0xA0..0xDF private dim1 0x9A same as charset |
82 | of 1-column width | |
83 | 0xE0..0xEF private dim1 0x9B same as charset | |
84 | of 2-column width | |
85 | 0xF0..0xF4 private dim2 0x9C same as charset | |
86 | of 1-column width | |
87 | 0xF5..0xFE private dim2 0x9D same as charset | |
88 | of 2-column width | |
89 | 0xFF --never used-- | |
90 | --------------------------------------------------------------------------- | |
91 | ||
4ed46869 KH |
92 | */ |
93 | ||
94 | /* Definition of special leading-codes. */ | |
4ed46869 KH |
95 | /* Leading-code followed by extended leading-code. */ |
96 | #define LEADING_CODE_PRIVATE_11 0x9A /* for private DIMENSION1 of 1-column */ | |
97 | #define LEADING_CODE_PRIVATE_12 0x9B /* for private DIMENSION1 of 2-column */ | |
98 | #define LEADING_CODE_PRIVATE_21 0x9C /* for private DIMENSION2 of 1-column */ | |
5c6257e5 | 99 | #define LEADING_CODE_PRIVATE_22 0x9D /* for private DIMENSION2 of 2-column */ |
4ed46869 | 100 | |
6e4dc3e1 KH |
101 | #define LEADING_CODE_8_BIT_CONTROL 0x9E /* for `eight-bit-control' */ |
102 | ||
4ed46869 KH |
103 | /* Extended leading-code. */ |
104 | /* Start of each extended leading-codes. */ | |
105 | #define LEADING_CODE_EXT_11 0xA0 /* follows LEADING_CODE_PRIVATE_11 */ | |
106 | #define LEADING_CODE_EXT_12 0xE0 /* follows LEADING_CODE_PRIVATE_12 */ | |
107 | #define LEADING_CODE_EXT_21 0xF0 /* follows LEADING_CODE_PRIVATE_21 */ | |
108 | #define LEADING_CODE_EXT_22 0xF5 /* follows LEADING_CODE_PRIVATE_22 */ | |
109 | /* Maximum value of extended leading-codes. */ | |
110 | #define LEADING_CODE_EXT_MAX 0xFE | |
111 | ||
112 | /* Definition of minimum/maximum charset of each DIMENSION. */ | |
2b9eeded | 113 | #define MIN_CHARSET_OFFICIAL_DIMENSION1 0x80 |
4ed46869 KH |
114 | #define MAX_CHARSET_OFFICIAL_DIMENSION1 0x8F |
115 | #define MIN_CHARSET_OFFICIAL_DIMENSION2 0x90 | |
116 | #define MAX_CHARSET_OFFICIAL_DIMENSION2 0x99 | |
117 | #define MIN_CHARSET_PRIVATE_DIMENSION1 LEADING_CODE_EXT_11 | |
118 | #define MIN_CHARSET_PRIVATE_DIMENSION2 LEADING_CODE_EXT_21 | |
119 | ||
03e66c53 KH |
120 | /* Maximum value of overall charset identification number. */ |
121 | #define MAX_CHARSET 0xFE | |
122 | ||
4ed46869 | 123 | /* Definition of special charsets. */ |
6e4dc3e1 KH |
124 | #define CHARSET_ASCII 0 /* 0x00..0x7F */ |
125 | #define CHARSET_8_BIT_CONTROL 0x9E /* 0x80..0x9F */ | |
88b837a2 | 126 | #define CHARSET_8_BIT_GRAPHIC 0x80 /* 0xA0..0xFF */ |
4ed46869 | 127 | |
4ed46869 KH |
128 | extern int charset_latin_iso8859_1; /* ISO8859-1 (Latin-1) */ |
129 | extern int charset_jisx0208_1978; /* JISX0208.1978 (Japanese Kanji old set) */ | |
130 | extern int charset_jisx0208; /* JISX0208.1983 (Japanese Kanji) */ | |
131 | extern int charset_katakana_jisx0201; /* JISX0201.Kana (Japanese Katakana) */ | |
132 | extern int charset_latin_jisx0201; /* JISX0201.Roman (Japanese Roman) */ | |
133 | extern int charset_big5_1; /* Big5 Level 1 (Chinese Traditional) */ | |
134 | extern int charset_big5_2; /* Big5 Level 2 (Chinese Traditional) */ | |
bde7944b KH |
135 | extern int charset_mule_unicode_0100_24ff; |
136 | extern int charset_mule_unicode_2500_33ff; | |
137 | extern int charset_mule_unicode_e000_ffff; | |
4ed46869 | 138 | |
6e4dc3e1 KH |
139 | /* Check if CH is an ASCII character or a base leading-code. |
140 | Nowadays, any byte can be the first byte of a character in a | |
141 | multibyte buffer/string. So this macro name is not appropriate. */ | |
c399b461 | 142 | #define CHAR_HEAD_P(ch) ((unsigned char) (ch) < 0xA0) |
4ed46869 KH |
143 | |
144 | /*** GENERAL NOTE on CHARACTER REPRESENTATION *** | |
145 | ||
d8e4f486 DL |
146 | Firstly, the term "character" or "char" is used for a multilingual |
147 | character (of course, including ASCII characters), not for a byte in | |
4ed46869 KH |
148 | computer memory. We use the term "code" or "byte" for the latter |
149 | case. | |
150 | ||
151 | A character is identified by charset and one or two POSITION-CODEs. | |
152 | POSITION-CODE is the position of the character in the charset. A | |
153 | character of DIMENSION1 charset has one POSITION-CODE: POSITION-CODE-1. | |
154 | A character of DIMENSION2 charset has two POSITION-CODE: | |
155 | POSITION-CODE-1 and POSITION-CODE-2. The code range of | |
156 | POSITION-CODE is 0x20..0x7F. | |
157 | ||
158 | Emacs has two kinds of representation of a character: multi-byte | |
d8e4f486 DL |
159 | form (for buffers and strings) and single-word form (for character |
160 | objects in Emacs Lisp). The latter is called "character code" | |
161 | hereafter. Both representations encode the information of charset | |
162 | and POSITION-CODE but in a different way (for instance, the MSB of | |
4ed46869 KH |
163 | POSITION-CODE is set in multi-byte form). |
164 | ||
d8e4f486 DL |
165 | For details of the multi-byte form, see the section "2. Emacs |
166 | internal format handlers" of `coding.c'. | |
4ed46869 KH |
167 | |
168 | Emacs uses 19 bits for a character code. The bits are divided into | |
169 | 3 fields: FIELD1(5bits):FIELD2(7bits):FIELD3(7bits). | |
170 | ||
171 | A character code of DIMENSION1 character uses FIELD2 to hold charset | |
172 | and FIELD3 to hold POSITION-CODE-1. A character code of DIMENSION2 | |
173 | character uses FIELD1 to hold charset, FIELD2 and FIELD3 to hold | |
174 | POSITION-CODE-1 and POSITION-CODE-2 respectively. | |
175 | ||
176 | More precisely... | |
177 | ||
6e4dc3e1 KH |
178 | FIELD2 of DIMENSION1 character (except for ascii, eight-bit-control, |
179 | and eight-bit-graphic) is "charset - 0x70". This is to make all | |
180 | character codes except for ASCII and 8-bit codes greater than 256. | |
181 | So, the range of FIELD2 of DIMENSION1 character is 0, 1, or | |
182 | 0x11..0x7F. | |
4ed46869 KH |
183 | |
184 | FIELD1 of DIMENSION2 character is "charset - 0x8F" for official | |
185 | charset and "charset - 0xE0" for private charset. So, the range of | |
186 | FIELD1 of DIMENSION2 character is 0x01..0x1E. | |
187 | ||
6e4dc3e1 KH |
188 | ----------------------------------------------------------------------------- |
189 | charset FIELD1 (5-bit) FIELD2 (7-bit) FIELD3 (7-bit) | |
190 | ----------------------------------------------------------------------------- | |
191 | ascii 0 0 0x00..0x7F | |
192 | eight-bit-control 0 1 0x00..0x1F | |
193 | eight-bit-graphic 0 1 0x20..0x7F | |
194 | DIMENSION1 0 charset - 0x70 POSITION-CODE-1 | |
195 | DIMENSION2(o) charset - 0x8F POSITION-CODE-1 POSITION-CODE-2 | |
196 | DIMENSION2(p) charset - 0xE0 POSITION-CODE-1 POSITION-CODE-2 | |
197 | ----------------------------------------------------------------------------- | |
4ed46869 | 198 | "(o)": official, "(p)": private |
6e4dc3e1 | 199 | ----------------------------------------------------------------------------- |
4ed46869 KH |
200 | */ |
201 | ||
4ed46869 KH |
202 | /* Masks of each field of character code. */ |
203 | #define CHAR_FIELD1_MASK (0x1F << 14) | |
204 | #define CHAR_FIELD2_MASK (0x7F << 7) | |
205 | #define CHAR_FIELD3_MASK 0x7F | |
206 | ||
207 | /* Macros to access each field of character C. */ | |
208 | #define CHAR_FIELD1(c) (((c) & CHAR_FIELD1_MASK) >> 14) | |
209 | #define CHAR_FIELD2(c) (((c) & CHAR_FIELD2_MASK) >> 7) | |
210 | #define CHAR_FIELD3(c) ((c) & CHAR_FIELD3_MASK) | |
211 | ||
212 | /* Minimum character code of character of each DIMENSION. */ | |
213 | #define MIN_CHAR_OFFICIAL_DIMENSION1 \ | |
2b9eeded | 214 | ((0x81 - 0x70) << 7) |
4ed46869 KH |
215 | #define MIN_CHAR_PRIVATE_DIMENSION1 \ |
216 | ((MIN_CHARSET_PRIVATE_DIMENSION1 - 0x70) << 7) | |
217 | #define MIN_CHAR_OFFICIAL_DIMENSION2 \ | |
218 | ((MIN_CHARSET_OFFICIAL_DIMENSION2 - 0x8F) << 14) | |
219 | #define MIN_CHAR_PRIVATE_DIMENSION2 \ | |
220 | ((MIN_CHARSET_PRIVATE_DIMENSION2 - 0xE0) << 14) | |
f49b37c9 KH |
221 | /* Maximum character code currently used plus 1. */ |
222 | #define MAX_CHAR (0x1F << 14) | |
4ed46869 | 223 | |
6e4dc3e1 | 224 | /* 1 if C is a single byte character, else 0. */ |
6f1a3d53 | 225 | #define SINGLE_BYTE_CHAR_P(c) (((unsigned)(c) & 0xFF) == (c)) |
4ed46869 | 226 | |
6e4dc3e1 | 227 | /* 1 if BYTE is an ASCII character in itself, in multibyte mode. */ |
7614f779 KH |
228 | #define ASCII_BYTE_P(byte) ((byte) < 0x80) |
229 | ||
d8e4f486 | 230 | /* A char-table containing information on each character set. |
4ed46869 | 231 | |
d8e4f486 | 232 | Unlike ordinary char-tables, this doesn't contain any nested tables. |
4ed46869 KH |
233 | Only the top level elements are used. Each element is a vector of |
234 | the following information: | |
235 | CHARSET-ID, BYTES, DIMENSION, CHARS, WIDTH, DIRECTION, | |
236 | LEADING-CODE-BASE, LEADING-CODE-EXT, | |
237 | ISO-FINAL-CHAR, ISO-GRAPHIC-PLANE, | |
238 | REVERSE-CHARSET, SHORT-NAME, LONG-NAME, DESCRIPTION, | |
239 | PLIST. | |
240 | ||
241 | CHARSET-ID (integer) is the identification number of the charset. | |
242 | ||
d8e4f486 DL |
243 | BYTES (integer) is the length of the multi-byte form of a character |
244 | in the charset: one of 1, 2, 3, and 4. | |
4ed46869 KH |
245 | |
246 | DIMENSION (integer) is the number of bytes to represent a character: 1 or 2. | |
247 | ||
248 | CHARS (integer) is the number of characters in a dimension: 94 or 96. | |
249 | ||
250 | WIDTH (integer) is the number of columns a character in the charset | |
6e4dc3e1 | 251 | occupies on the screen: one of 0, 1, and 2.. |
4ed46869 KH |
252 | |
253 | DIRECTION (integer) is the rendering direction of characters in the | |
28d0c844 KH |
254 | charset when rendering. If 0, render from left to right, else |
255 | render from right to left. | |
4ed46869 KH |
256 | |
257 | LEADING-CODE-BASE (integer) is the base leading-code for the | |
258 | charset. | |
259 | ||
260 | LEADING-CODE-EXT (integer) is the extended leading-code for the | |
d8e4f486 | 261 | charset. All charsets of less than 0xA0 have the value 0. |
4ed46869 KH |
262 | |
263 | ISO-FINAL-CHAR (character) is the final character of the | |
6e4dc3e1 KH |
264 | corresponding ISO 2022 charset. It is -1 for such a character |
265 | that is used only internally (e.g. `eight-bit-control'). | |
4ed46869 KH |
266 | |
267 | ISO-GRAPHIC-PLANE (integer) is the graphic plane to be invoked | |
268 | while encoding to variants of ISO 2022 coding system, one of the | |
6e4dc3e1 KH |
269 | following: 0/graphic-plane-left(GL), 1/graphic-plane-right(GR). It |
270 | is -1 for such a character that is used only internally | |
271 | (e.g. `eight-bit-control'). | |
4ed46869 KH |
272 | |
273 | REVERSE-CHARSET (integer) is the charset which differs only in | |
274 | LEFT-TO-RIGHT value from the charset. If there's no such a | |
275 | charset, the value is -1. | |
d8e4f486 | 276 | |
4ed46869 KH |
277 | SHORT-NAME (string) is the short name to refer to the charset. |
278 | ||
279 | LONG-NAME (string) is the long name to refer to the charset. | |
280 | ||
281 | DESCRIPTION (string) is the description string of the charset. | |
282 | ||
283 | PLIST (property list) may contain any type of information a user | |
d8e4f486 | 284 | wants to put and get by functions `put-charset-property' and |
4ed46869 KH |
285 | `get-charset-property' respectively. */ |
286 | extern Lisp_Object Vcharset_table; | |
287 | ||
288 | /* Macros to access various information of CHARSET in Vcharset_table. | |
289 | We provide these macros for efficiency. No range check of CHARSET. */ | |
290 | ||
a3f4e3d9 | 291 | /* Return entry of CHARSET (C integer) in Vcharset_table. */ |
d6f92c04 KH |
292 | #define CHARSET_TABLE_ENTRY(charset) \ |
293 | XCHAR_TABLE (Vcharset_table)->contents[((charset) == CHARSET_ASCII \ | |
294 | ? 0 : (charset) + 128)] | |
4ed46869 KH |
295 | |
296 | /* Return information INFO-IDX of CHARSET. */ | |
297 | #define CHARSET_TABLE_INFO(charset, info_idx) \ | |
298 | XVECTOR (CHARSET_TABLE_ENTRY (charset))->contents[info_idx] | |
299 | ||
300 | #define CHARSET_ID_IDX (0) | |
301 | #define CHARSET_BYTES_IDX (1) | |
302 | #define CHARSET_DIMENSION_IDX (2) | |
303 | #define CHARSET_CHARS_IDX (3) | |
304 | #define CHARSET_WIDTH_IDX (4) | |
305 | #define CHARSET_DIRECTION_IDX (5) | |
306 | #define CHARSET_LEADING_CODE_BASE_IDX (6) | |
307 | #define CHARSET_LEADING_CODE_EXT_IDX (7) | |
308 | #define CHARSET_ISO_FINAL_CHAR_IDX (8) | |
309 | #define CHARSET_ISO_GRAPHIC_PLANE_IDX (9) | |
310 | #define CHARSET_REVERSE_CHARSET_IDX (10) | |
311 | #define CHARSET_SHORT_NAME_IDX (11) | |
312 | #define CHARSET_LONG_NAME_IDX (12) | |
313 | #define CHARSET_DESCRIPTION_IDX (13) | |
314 | #define CHARSET_PLIST_IDX (14) | |
315 | /* Size of a vector of each entry of Vcharset_table. */ | |
316 | #define CHARSET_MAX_IDX (15) | |
317 | ||
318 | /* And several more macros to be used frequently. */ | |
319 | #define CHARSET_BYTES(charset) \ | |
320 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_BYTES_IDX)) | |
321 | #define CHARSET_DIMENSION(charset) \ | |
322 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_DIMENSION_IDX)) | |
323 | #define CHARSET_CHARS(charset) \ | |
324 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_CHARS_IDX)) | |
325 | #define CHARSET_WIDTH(charset) \ | |
326 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_WIDTH_IDX)) | |
327 | #define CHARSET_DIRECTION(charset) \ | |
328 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_DIRECTION_IDX)) | |
329 | #define CHARSET_LEADING_CODE_BASE(charset) \ | |
330 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_LEADING_CODE_BASE_IDX)) | |
331 | #define CHARSET_LEADING_CODE_EXT(charset) \ | |
332 | XFASTINT (CHARSET_TABLE_INFO (charset, CHARSET_LEADING_CODE_EXT_IDX)) | |
333 | #define CHARSET_ISO_FINAL_CHAR(charset) \ | |
6e4dc3e1 | 334 | XINT (CHARSET_TABLE_INFO (charset, CHARSET_ISO_FINAL_CHAR_IDX)) |
4ed46869 | 335 | #define CHARSET_ISO_GRAPHIC_PLANE(charset) \ |
6e4dc3e1 | 336 | XINT (CHARSET_TABLE_INFO (charset, CHARSET_ISO_GRAPHIC_PLANE_IDX)) |
4ed46869 KH |
337 | #define CHARSET_REVERSE_CHARSET(charset) \ |
338 | XINT (CHARSET_TABLE_INFO (charset, CHARSET_REVERSE_CHARSET_IDX)) | |
339 | ||
340 | /* Macros to specify direction of a charset. */ | |
341 | #define CHARSET_DIRECTION_LEFT_TO_RIGHT 0 | |
342 | #define CHARSET_DIRECTION_RIGHT_TO_LEFT 1 | |
343 | ||
344 | /* A vector of charset symbol indexed by charset-id. This is used | |
345 | only for returning charset symbol from C functions. */ | |
346 | extern Lisp_Object Vcharset_symbol_table; | |
347 | ||
348 | /* Return symbol of CHARSET. */ | |
349 | #define CHARSET_SYMBOL(charset) \ | |
350 | XVECTOR (Vcharset_symbol_table)->contents[charset] | |
351 | ||
384107f2 | 352 | /* 1 if CHARSET is in valid value range, else 0. */ |
4ed46869 KH |
353 | #define CHARSET_VALID_P(charset) \ |
354 | ((charset) == 0 \ | |
f49b37c9 | 355 | || ((charset) > 0x80 && (charset) <= MAX_CHARSET_OFFICIAL_DIMENSION2) \ |
6e4dc3e1 KH |
356 | || ((charset) >= MIN_CHARSET_PRIVATE_DIMENSION1 \ |
357 | && (charset) <= MAX_CHARSET) \ | |
358 | || ((charset) == CHARSET_8_BIT_CONTROL) \ | |
359 | || ((charset) == CHARSET_8_BIT_GRAPHIC)) | |
4ed46869 | 360 | |
f49b37c9 | 361 | /* 1 if CHARSET is already defined, else 0. */ |
4ed46869 | 362 | #define CHARSET_DEFINED_P(charset) \ |
03e66c53 | 363 | (((charset) >= 0) && ((charset) <= MAX_CHARSET) \ |
4ed46869 KH |
364 | && !NILP (CHARSET_TABLE_ENTRY (charset))) |
365 | ||
366 | /* Since the information CHARSET-BYTES and CHARSET-WIDTH of | |
6e4dc3e1 | 367 | Vcharset_table can be retrieved only by the first byte of |
4ed46869 KH |
368 | multi-byte form (an ASCII code or a base leading-code), we provide |
369 | here tables to be used by macros BYTES_BY_CHAR_HEAD and | |
370 | WIDTH_BY_CHAR_HEAD for faster information retrieval. */ | |
371 | extern int bytes_by_char_head[256]; | |
372 | extern int width_by_char_head[256]; | |
373 | ||
6e4dc3e1 KH |
374 | #define BYTES_BY_CHAR_HEAD(char_head) \ |
375 | (ASCII_BYTE_P (char_head) ? 1 : bytes_by_char_head[char_head]) | |
376 | #define WIDTH_BY_CHAR_HEAD(char_head) \ | |
377 | (ASCII_BYTE_P (char_head) ? 1 : width_by_char_head[char_head]) | |
4ed46869 KH |
378 | |
379 | /* Charset of the character C. */ | |
6e4dc3e1 KH |
380 | #define CHAR_CHARSET(c) \ |
381 | (SINGLE_BYTE_CHAR_P (c) \ | |
382 | ? (ASCII_BYTE_P (c) \ | |
383 | ? CHARSET_ASCII \ | |
384 | : (c) < 0xA0 ? CHARSET_8_BIT_CONTROL : CHARSET_8_BIT_GRAPHIC) \ | |
385 | : ((c) < MIN_CHAR_OFFICIAL_DIMENSION2 \ | |
386 | ? CHAR_FIELD2 (c) + 0x70 \ | |
387 | : ((c) < MIN_CHAR_PRIVATE_DIMENSION2 \ | |
388 | ? CHAR_FIELD1 (c) + 0x8F \ | |
f49b37c9 | 389 | : CHAR_FIELD1 (c) + 0xE0))) |
4ed46869 | 390 | |
f49b37c9 | 391 | /* Check if two characters C1 and C2 belong to the same charset. */ |
6e4dc3e1 KH |
392 | #define SAME_CHARSET_P(c1, c2) \ |
393 | (c1 < MIN_CHAR_OFFICIAL_DIMENSION2 \ | |
394 | ? (c1 & CHAR_FIELD2_MASK) == (c2 & CHAR_FIELD2_MASK) \ | |
395 | : (c1 & CHAR_FIELD1_MASK) == (c2 & CHAR_FIELD1_MASK)) | |
4ed46869 KH |
396 | |
397 | /* Return a character of which charset is CHARSET and position-codes | |
398 | are C1 and C2. DIMENSION1 character ignores C2. */ | |
6e4dc3e1 KH |
399 | #define MAKE_CHAR(charset, c1, c2) \ |
400 | ((charset) == CHARSET_ASCII \ | |
401 | ? (c1) & 0x7F \ | |
402 | : (((charset) == CHARSET_8_BIT_CONTROL \ | |
403 | || (charset) == CHARSET_8_BIT_GRAPHIC) \ | |
404 | ? ((c1) & 0x7F) | 0x80 \ | |
f164d9b5 KH |
405 | : ((CHARSET_DEFINED_P (charset) \ |
406 | ? CHARSET_DIMENSION (charset) == 1 \ | |
407 | : (charset) < MIN_CHARSET_PRIVATE_DIMENSION2) \ | |
2cd31e75 | 408 | ? (((charset) - 0x70) << 7) | ((c1) <= 0 ? 0 : ((c1) & 0x7F)) \ |
6e4dc3e1 KH |
409 | : ((((charset) \ |
410 | - ((charset) < MIN_CHARSET_PRIVATE_DIMENSION2 ? 0x8F : 0xE0)) \ | |
411 | << 14) \ | |
412 | | ((c2) <= 0 ? 0 : ((c2) & 0x7F)) \ | |
413 | | ((c1) <= 0 ? 0 : (((c1) & 0x7F) << 7)))))) | |
414 | ||
4ed46869 | 415 | |
e0f24100 GM |
416 | /* If GENERICP is nonzero, return nonzero if C is a valid normal or |
417 | generic character. If GENERICP is zero, return nonzero if C is a | |
15979e9e KH |
418 | valid normal character. */ |
419 | #define CHAR_VALID_P(c, genericp) \ | |
420 | ((c) >= 0 \ | |
421 | && (SINGLE_BYTE_CHAR_P (c) || char_valid_p (c, genericp))) | |
c6112b99 | 422 | |
d74d0ca5 | 423 | /* This default value is used when nonascii-translation-table or |
54e15bb9 KH |
424 | nonascii-insert-offset fail to convert unibyte character to a valid |
425 | multibyte character. This makes a Latin-1 character. */ | |
426 | ||
427 | #define DEFAULT_NONASCII_INSERT_OFFSET 0x800 | |
428 | ||
6e4dc3e1 KH |
429 | /* Parse multibyte string STR of length LENGTH and set BYTES to the |
430 | byte length of a character at STR. */ | |
431 | ||
432 | #ifdef BYTE_COMBINING_DEBUG | |
384107f2 KH |
433 | |
434 | #define PARSE_MULTIBYTE_SEQ(str, length, bytes) \ | |
435 | do { \ | |
436 | int i = 1; \ | |
f49b37c9 | 437 | while (i < (length) && ! CHAR_HEAD_P ((str)[i])) i++; \ |
6e4dc3e1 KH |
438 | (bytes) = BYTES_BY_CHAR_HEAD ((str)[0]); \ |
439 | if ((bytes) > i) \ | |
440 | abort (); \ | |
384107f2 | 441 | } while (0) |
54e15bb9 | 442 | |
6e4dc3e1 | 443 | #else /* not BYTE_COMBINING_DEBUG */ |
feb453fa | 444 | |
6e4dc3e1 | 445 | #define PARSE_MULTIBYTE_SEQ(str, length, bytes) \ |
304f9d2a | 446 | ((void)(length), (bytes) = BYTES_BY_CHAR_HEAD ((str)[0])) |
feb453fa | 447 | |
6e4dc3e1 KH |
448 | #endif /* not BYTE_COMBINING_DEBUG */ |
449 | ||
1efcd78f KH |
450 | #define VALID_LEADING_CODE_P(code) \ |
451 | (! NILP (CHARSET_TABLE_ENTRY (code))) | |
452 | ||
e0f24100 | 453 | /* Return 1 if the byte sequence at unibyte string STR (LENGTH bytes) |
6e4dc3e1 KH |
454 | is valid as a multibyte form. If valid, by a side effect, BYTES is |
455 | set to the byte length of the multibyte form. */ | |
456 | ||
1efcd78f KH |
457 | #define UNIBYTE_STR_AS_MULTIBYTE_P(str, length, bytes) \ |
458 | (((str)[0] < 0x80 || (str)[0] >= 0xA0) \ | |
459 | ? ((bytes) = 1) \ | |
460 | : (((bytes) = BYTES_BY_CHAR_HEAD ((str)[0])), \ | |
461 | ((bytes) <= (length) \ | |
462 | && !CHAR_HEAD_P ((str)[1]) \ | |
463 | && ((bytes) == 2 \ | |
464 | ? (str)[0] != LEADING_CODE_8_BIT_CONTROL \ | |
465 | : (!CHAR_HEAD_P ((str)[2]) \ | |
466 | && ((bytes) == 3 \ | |
467 | ? (((str)[0] != LEADING_CODE_PRIVATE_11 \ | |
468 | && (str)[0] != LEADING_CODE_PRIVATE_12) \ | |
469 | || VALID_LEADING_CODE_P (str[1])) \ | |
470 | : (!CHAR_HEAD_P ((str)[3]) \ | |
471 | && VALID_LEADING_CODE_P (str[1])))))))) | |
472 | ||
6e4dc3e1 | 473 | |
e0f24100 | 474 | /* Return 1 if the byte sequence at multibyte string STR is valid as |
6e4dc3e1 KH |
475 | a unibyte form. By a side effect, BYTES is set to the byte length |
476 | of one character at STR. */ | |
477 | ||
478 | #define MULTIBYTE_STR_AS_UNIBYTE_P(str, bytes) \ | |
479 | ((bytes) = BYTES_BY_CHAR_HEAD ((str)[0]), \ | |
480 | (str)[0] != LEADING_CODE_8_BIT_CONTROL) | |
4ed46869 | 481 | |
feb453fa RS |
482 | /* The charset of character C is stored in CHARSET, and the |
483 | position-codes of C are stored in C1 and C2. | |
9dd2aa1a | 484 | We store -1 in C2 if the dimension of the charset is 1. */ |
feb453fa | 485 | |
f164d9b5 KH |
486 | #define SPLIT_CHAR(c, charset, c1, c2) \ |
487 | (SINGLE_BYTE_CHAR_P (c) \ | |
488 | ? ((charset \ | |
489 | = (ASCII_BYTE_P (c) \ | |
490 | ? CHARSET_ASCII \ | |
491 | : ((c) < 0xA0 ? CHARSET_8_BIT_CONTROL : CHARSET_8_BIT_GRAPHIC))), \ | |
492 | c1 = (c), c2 = -1) \ | |
493 | : ((c) & CHAR_FIELD1_MASK \ | |
494 | ? (charset = (CHAR_FIELD1 (c) \ | |
495 | + ((c) < MIN_CHAR_PRIVATE_DIMENSION2 ? 0x8F : 0xE0)), \ | |
496 | c1 = CHAR_FIELD2 (c), \ | |
497 | c2 = CHAR_FIELD3 (c)) \ | |
498 | : (charset = CHAR_FIELD2 (c) + 0x70, \ | |
499 | c1 = CHAR_FIELD3 (c), \ | |
6e4dc3e1 | 500 | c2 = -1))) |
4ed46869 | 501 | |
e0f24100 | 502 | /* Return 1 if character C has valid printable glyph. */ |
6e4dc3e1 | 503 | #define CHAR_PRINTABLE_P(c) (ASCII_BYTE_P (c) || char_printable_p (c)) |
384107f2 | 504 | |
feb453fa RS |
505 | /* The charset of the character at STR is stored in CHARSET, and the |
506 | position-codes are stored in C1 and C2. | |
f49b37c9 | 507 | We store -1 in C2 if the character is just 2 bytes. */ |
feb453fa | 508 | |
f49b37c9 KH |
509 | #define SPLIT_STRING(str, len, charset, c1, c2) \ |
510 | ((BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) < 2 \ | |
511 | || BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) > len \ | |
512 | || split_string (str, len, &charset, &c1, &c2) < 0) \ | |
513 | ? c1 = *(str), charset = CHARSET_ASCII \ | |
4ed46869 KH |
514 | : charset) |
515 | ||
4ed46869 KH |
516 | /* Mapping table from ISO2022's charset (specified by DIMENSION, |
517 | CHARS, and FINAL_CHAR) to Emacs' charset. Should be accessed by | |
518 | macro ISO_CHARSET_TABLE (DIMENSION, CHARS, FINAL_CHAR). */ | |
519 | extern int iso_charset_table[2][2][128]; | |
520 | ||
521 | #define ISO_CHARSET_TABLE(dimension, chars, final_char) \ | |
522 | iso_charset_table[XINT (dimension) - 1][XINT (chars) > 94][XINT (final_char)] | |
523 | ||
524 | #define BASE_LEADING_CODE_P(c) (BYTES_BY_CHAR_HEAD ((unsigned char) (c)) > 1) | |
525 | ||
3124bc0e | 526 | /* Return how many bytes C will occupy in a multibyte buffer. */ |
6e4dc3e1 KH |
527 | #define CHAR_BYTES(c) \ |
528 | (SINGLE_BYTE_CHAR_P (c) \ | |
529 | ? ((ASCII_BYTE_P (c) || (c) >= 0xA0) ? 1 : 2) \ | |
530 | : char_bytes (c)) | |
3124bc0e | 531 | |
4ed46869 | 532 | /* The following two macros CHAR_STRING and STRING_CHAR are the main |
d8e4f486 | 533 | entry points to convert between Emacs's two types of character |
4ed46869 KH |
534 | representations: multi-byte form and single-word form (character |
535 | code). */ | |
536 | ||
f49b37c9 | 537 | /* Store multi-byte form of the character C in STR. The caller should |
6e4dc3e1 KH |
538 | allocate at least MAX_MULTIBYTE_LENGTH bytes area at STR in |
539 | advance. Returns the length of the multi-byte form. If C is an | |
540 | invalid character code, signal an error. */ | |
4ed46869 | 541 | |
e10ae834 KH |
542 | #define CHAR_STRING(c, str) \ |
543 | (SINGLE_BYTE_CHAR_P (c) \ | |
6f1a3d53 | 544 | ? ((ASCII_BYTE_P (c) || c >= 0xA0) \ |
e10ae834 KH |
545 | ? (*(str) = (unsigned char)(c), 1) \ |
546 | : (*(str) = LEADING_CODE_8_BIT_CONTROL, *((str)+ 1) = c + 0x20, 2)) \ | |
6e4dc3e1 | 547 | : char_to_string (c, (unsigned char *) str)) |
4ed46869 | 548 | |
e06aa1f9 GM |
549 | /* Like CHAR_STRING but don't signal an error if C is invalid. |
550 | Value is -1 in this case. */ | |
551 | ||
552 | #define CHAR_STRING_NO_SIGNAL(c, str) \ | |
553 | (SINGLE_BYTE_CHAR_P (c) \ | |
554 | ? ((ASCII_BYTE_P (c) || c >= 0xA0) \ | |
555 | ? (*(str) = (unsigned char)(c), 1) \ | |
556 | : (*(str) = LEADING_CODE_8_BIT_CONTROL, *((str)+ 1) = c + 0x20, 2)) \ | |
557 | : char_to_string_1 (c, (unsigned char *) str)) | |
558 | ||
4ed46869 KH |
559 | /* Return a character code of the character of which multi-byte form |
560 | is at STR and the length is LEN. If STR doesn't contain valid | |
561 | multi-byte form, only the first byte in STR is returned. */ | |
562 | ||
dfd57aa7 KH |
563 | #define STRING_CHAR(str, len) \ |
564 | (BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) == 1 \ | |
565 | ? (unsigned char) *(str) \ | |
f49b37c9 | 566 | : string_to_char (str, len, 0)) |
4ed46869 | 567 | |
384107f2 KH |
568 | /* This is like STRING_CHAR but the third arg ACTUAL_LEN is set to the |
569 | length of the multi-byte form. Just to know the length, use | |
4ed46869 KH |
570 | MULTIBYTE_FORM_LENGTH. */ |
571 | ||
384107f2 KH |
572 | #define STRING_CHAR_AND_LENGTH(str, len, actual_len) \ |
573 | (BYTES_BY_CHAR_HEAD ((unsigned char) *(str)) == 1 \ | |
574 | ? ((actual_len) = 1), (unsigned char) *(str) \ | |
f49b37c9 | 575 | : string_to_char (str, len, &(actual_len))) |
d74d0ca5 | 576 | |
6e4dc3e1 KH |
577 | /* Fetch the "next" character from Lisp string STRING at byte position |
578 | BYTEIDX, character position CHARIDX. Store it into OUTPUT. | |
520afed1 RS |
579 | |
580 | All the args must be side-effect-free. | |
581 | BYTEIDX and CHARIDX must be lvalues; | |
582 | we increment them past the character fetched. */ | |
583 | ||
6e4dc3e1 KH |
584 | #define FETCH_STRING_CHAR_ADVANCE(OUTPUT, STRING, CHARIDX, BYTEIDX) \ |
585 | if (1) \ | |
586 | { \ | |
587 | CHARIDX++; \ | |
588 | if (STRING_MULTIBYTE (STRING)) \ | |
589 | { \ | |
8a25217a | 590 | const unsigned char *ptr = SDATA (STRING) + BYTEIDX; \ |
9f5348e3 | 591 | int space_left = SBYTES (STRING) - BYTEIDX; \ |
6e4dc3e1 KH |
592 | int actual_len; \ |
593 | \ | |
594 | OUTPUT = STRING_CHAR_AND_LENGTH (ptr, space_left, actual_len); \ | |
595 | BYTEIDX += actual_len; \ | |
596 | } \ | |
597 | else \ | |
d5db4077 | 598 | OUTPUT = SREF (STRING, BYTEIDX++); \ |
6e4dc3e1 KH |
599 | } \ |
600 | else | |
601 | ||
602 | /* Like FETCH_STRING_CHAR_ADVANCE but assume STRING is multibyte. */ | |
603 | ||
604 | #define FETCH_STRING_CHAR_ADVANCE_NO_CHECK(OUTPUT, STRING, CHARIDX, BYTEIDX) \ | |
520afed1 RS |
605 | if (1) \ |
606 | { \ | |
8a25217a | 607 | const unsigned char *fetch_string_char_ptr = SDATA (STRING) + BYTEIDX; \ |
9f5348e3 | 608 | int fetch_string_char_space_left = SBYTES (STRING) - BYTEIDX; \ |
520afed1 RS |
609 | int actual_len; \ |
610 | \ | |
611 | OUTPUT \ | |
612 | = STRING_CHAR_AND_LENGTH (fetch_string_char_ptr, \ | |
613 | fetch_string_char_space_left, actual_len); \ | |
614 | \ | |
615 | BYTEIDX += actual_len; \ | |
616 | CHARIDX++; \ | |
617 | } \ | |
618 | else | |
619 | ||
6e4dc3e1 KH |
620 | /* Like FETCH_STRING_CHAR_ADVANCE but fetch character from the current |
621 | buffer. */ | |
f49b37c9 KH |
622 | |
623 | #define FETCH_CHAR_ADVANCE(OUTPUT, CHARIDX, BYTEIDX) \ | |
624 | if (1) \ | |
625 | { \ | |
f49b37c9 | 626 | CHARIDX++; \ |
6e4dc3e1 KH |
627 | if (!NILP (current_buffer->enable_multibyte_characters)) \ |
628 | { \ | |
629 | unsigned char *ptr = BYTE_POS_ADDR (BYTEIDX); \ | |
630 | int space_left = ((CHARIDX < GPT ? GPT_BYTE : Z_BYTE) - BYTEIDX); \ | |
631 | int actual_len; \ | |
632 | \ | |
633 | OUTPUT= STRING_CHAR_AND_LENGTH (ptr, space_left, actual_len); \ | |
634 | BYTEIDX += actual_len; \ | |
635 | } \ | |
636 | else \ | |
637 | { \ | |
638 | OUTPUT = *(BYTE_POS_ADDR (BYTEIDX)); \ | |
639 | BYTEIDX++; \ | |
640 | } \ | |
f49b37c9 KH |
641 | } \ |
642 | else | |
643 | ||
4ed46869 KH |
644 | /* Return the length of the multi-byte form at string STR of length LEN. */ |
645 | ||
d121936f KH |
646 | #define MULTIBYTE_FORM_LENGTH(str, len) \ |
647 | (BYTES_BY_CHAR_HEAD (*(unsigned char *)(str)) == 1 \ | |
648 | ? 1 \ | |
4ed46869 KH |
649 | : multibyte_form_length (str, len)) |
650 | ||
d3985b78 KH |
651 | /* If P is before LIMIT, advance P to the next character boundary. It |
652 | assumes that P is already at a character boundary of the sane | |
653 | mulitbyte form whose end address is LIMIT. */ | |
654 | ||
655 | #define NEXT_CHAR_BOUNDARY(p, limit) \ | |
656 | do { \ | |
657 | if ((p) < (limit)) \ | |
658 | (p) += BYTES_BY_CHAR_HEAD (*(p)); \ | |
659 | } while (0) | |
660 | ||
661 | ||
3ffcda54 | 662 | /* If P is after LIMIT, advance P to the previous character boundary. */ |
d3985b78 KH |
663 | |
664 | #define PREV_CHAR_BOUNDARY(p, limit) \ | |
665 | do { \ | |
666 | if ((p) > (limit)) \ | |
667 | { \ | |
668 | const unsigned char *p0 = (p); \ | |
3ffcda54 | 669 | const unsigned char *p_limit = max (limit, p0 - MAX_MULTIBYTE_LENGTH);\ |
d3985b78 KH |
670 | do { \ |
671 | p0--; \ | |
3ffcda54 SM |
672 | } while (p0 >= p_limit && ! CHAR_HEAD_P (*p0)); \ |
673 | /* If BBCH(*p0) > p-p0, it means we were not on a boundary. */ \ | |
674 | (p) = (BYTES_BY_CHAR_HEAD (*p0) >= (p) - p0) ? p0 : (p) - 1; \ | |
d3985b78 KH |
675 | } \ |
676 | } while (0) | |
677 | ||
3ffcda54 SM |
678 | #define AT_CHAR_BOUNDARY_P(result, p, limit) \ |
679 | do { \ | |
680 | if (CHAR_HEAD_P (*(p)) || (p) <= limit) \ | |
681 | /* Optimization for the common case. */ \ | |
682 | (result) = 1; \ | |
683 | else \ | |
684 | { \ | |
685 | const unsigned char *p_aux = (p)+1; \ | |
686 | PREV_CHAR_BOUNDARY (p_aux, limit); \ | |
687 | (result) = (p_aux == (p)); \ | |
688 | } \ | |
689 | } while (0) | |
d3985b78 | 690 | |
4ed46869 KH |
691 | #ifdef emacs |
692 | ||
384107f2 KH |
693 | /* Increase the buffer byte position POS_BYTE of the current buffer to |
694 | the next character boundary. This macro relies on the fact that | |
695 | *GPT_ADDR and *Z_ADDR are always accessible and the values are | |
696 | '\0'. No range checking of POS. */ | |
6e4dc3e1 KH |
697 | |
698 | #ifdef BYTE_COMBINING_DEBUG | |
699 | ||
384107f2 KH |
700 | #define INC_POS(pos_byte) \ |
701 | do { \ | |
702 | unsigned char *p = BYTE_POS_ADDR (pos_byte); \ | |
703 | if (BASE_LEADING_CODE_P (*p)) \ | |
704 | { \ | |
705 | int len, bytes; \ | |
706 | len = Z_BYTE - pos_byte; \ | |
707 | PARSE_MULTIBYTE_SEQ (p, len, bytes); \ | |
708 | pos_byte += bytes; \ | |
709 | } \ | |
710 | else \ | |
711 | pos_byte++; \ | |
4ed46869 KH |
712 | } while (0) |
713 | ||
6e4dc3e1 KH |
714 | #else /* not BYTE_COMBINING_DEBUG */ |
715 | ||
716 | #define INC_POS(pos_byte) \ | |
717 | do { \ | |
718 | unsigned char *p = BYTE_POS_ADDR (pos_byte); \ | |
719 | pos_byte += BYTES_BY_CHAR_HEAD (*p); \ | |
720 | } while (0) | |
721 | ||
722 | #endif /* not BYTE_COMBINING_DEBUG */ | |
723 | ||
384107f2 KH |
724 | /* Decrease the buffer byte position POS_BYTE of the current buffer to |
725 | the previous character boundary. No range checking of POS. */ | |
726 | #define DEC_POS(pos_byte) \ | |
727 | do { \ | |
728 | unsigned char *p, *p_min; \ | |
729 | \ | |
730 | pos_byte--; \ | |
731 | if (pos_byte < GPT_BYTE) \ | |
02dcfd84 | 732 | p = BEG_ADDR + pos_byte - BEG_BYTE, p_min = BEG_ADDR; \ |
384107f2 | 733 | else \ |
02dcfd84 | 734 | p = BEG_ADDR + GAP_SIZE + pos_byte - BEG_BYTE, p_min = GAP_END_ADDR;\ |
384107f2 KH |
735 | if (p > p_min && !CHAR_HEAD_P (*p)) \ |
736 | { \ | |
737 | unsigned char *pend = p--; \ | |
738 | int len, bytes; \ | |
02dcfd84 SM |
739 | if (p_min < p - MAX_MULTIBYTE_LENGTH) \ |
740 | p_min = p - MAX_MULTIBYTE_LENGTH; \ | |
384107f2 KH |
741 | while (p > p_min && !CHAR_HEAD_P (*p)) p--; \ |
742 | len = pend + 1 - p; \ | |
743 | PARSE_MULTIBYTE_SEQ (p, len, bytes); \ | |
744 | if (bytes == len) \ | |
745 | pos_byte -= len - 1; \ | |
746 | } \ | |
c399b461 RS |
747 | } while (0) |
748 | ||
749 | /* Increment both CHARPOS and BYTEPOS, each in the appropriate way. */ | |
750 | ||
d619ee06 RS |
751 | #define INC_BOTH(charpos, bytepos) \ |
752 | do \ | |
753 | { \ | |
754 | (charpos)++; \ | |
755 | if (NILP (current_buffer->enable_multibyte_characters)) \ | |
756 | (bytepos)++; \ | |
757 | else \ | |
758 | INC_POS ((bytepos)); \ | |
759 | } \ | |
c399b461 RS |
760 | while (0) |
761 | ||
762 | /* Decrement both CHARPOS and BYTEPOS, each in the appropriate way. */ | |
763 | ||
d619ee06 RS |
764 | #define DEC_BOTH(charpos, bytepos) \ |
765 | do \ | |
766 | { \ | |
767 | (charpos)--; \ | |
768 | if (NILP (current_buffer->enable_multibyte_characters)) \ | |
769 | (bytepos)--; \ | |
770 | else \ | |
771 | DEC_POS ((bytepos)); \ | |
772 | } \ | |
c399b461 RS |
773 | while (0) |
774 | ||
384107f2 KH |
775 | /* Increase the buffer byte position POS_BYTE of the current buffer to |
776 | the next character boundary. This macro relies on the fact that | |
777 | *GPT_ADDR and *Z_ADDR are always accessible and the values are | |
778 | '\0'. No range checking of POS_BYTE. */ | |
6e4dc3e1 KH |
779 | |
780 | #ifdef BYTE_COMBINING_DEBUG | |
781 | ||
384107f2 KH |
782 | #define BUF_INC_POS(buf, pos_byte) \ |
783 | do { \ | |
784 | unsigned char *p = BUF_BYTE_ADDRESS (buf, pos_byte); \ | |
785 | if (BASE_LEADING_CODE_P (*p)) \ | |
bb5999ae | 786 | { \ |
384107f2 KH |
787 | int len, bytes; \ |
788 | len = BUF_Z_BYTE (buf) - pos_byte; \ | |
789 | PARSE_MULTIBYTE_SEQ (p, len, bytes); \ | |
790 | pos_byte += bytes; \ | |
bb5999ae | 791 | } \ |
384107f2 KH |
792 | else \ |
793 | pos_byte++; \ | |
794 | } while (0) | |
795 | ||
6e4dc3e1 KH |
796 | #else /* not BYTE_COMBINING_DEBUG */ |
797 | ||
798 | #define BUF_INC_POS(buf, pos_byte) \ | |
799 | do { \ | |
800 | unsigned char *p = BUF_BYTE_ADDRESS (buf, pos_byte); \ | |
801 | pos_byte += BYTES_BY_CHAR_HEAD (*p); \ | |
802 | } while (0) | |
803 | ||
804 | #endif /* not BYTE_COMBINING_DEBUG */ | |
805 | ||
384107f2 KH |
806 | /* Decrease the buffer byte position POS_BYTE of the current buffer to |
807 | the previous character boundary. No range checking of POS_BYTE. */ | |
808 | #define BUF_DEC_POS(buf, pos_byte) \ | |
809 | do { \ | |
810 | unsigned char *p, *p_min; \ | |
811 | pos_byte--; \ | |
812 | if (pos_byte < BUF_GPT_BYTE (buf)) \ | |
813 | { \ | |
02dcfd84 | 814 | p = BUF_BEG_ADDR (buf) + pos_byte - BEG_BYTE; \ |
384107f2 KH |
815 | p_min = BUF_BEG_ADDR (buf); \ |
816 | } \ | |
817 | else \ | |
818 | { \ | |
02dcfd84 | 819 | p = BUF_BEG_ADDR (buf) + BUF_GAP_SIZE (buf) + pos_byte - BEG_BYTE;\ |
384107f2 KH |
820 | p_min = BUF_GAP_END_ADDR (buf); \ |
821 | } \ | |
822 | if (p > p_min && !CHAR_HEAD_P (*p)) \ | |
823 | { \ | |
824 | unsigned char *pend = p--; \ | |
825 | int len, bytes; \ | |
02dcfd84 SM |
826 | if (p_min < p - MAX_MULTIBYTE_LENGTH) \ |
827 | p_min = p - MAX_MULTIBYTE_LENGTH; \ | |
384107f2 KH |
828 | while (p > p_min && !CHAR_HEAD_P (*p)) p--; \ |
829 | len = pend + 1 - p; \ | |
830 | PARSE_MULTIBYTE_SEQ (p, len, bytes); \ | |
831 | if (bytes == len) \ | |
832 | pos_byte -= len - 1; \ | |
833 | } \ | |
4ed46869 KH |
834 | } while (0) |
835 | ||
836 | #endif /* emacs */ | |
837 | ||
f49b37c9 KH |
838 | /* This is the maximum byte length of multi-byte sequence. */ |
839 | #define MAX_MULTIBYTE_LENGTH 4 | |
4ed46869 | 840 | |
345b3483 | 841 | extern void invalid_character P_ ((int)) NO_RETURN; |
bb5999ae | 842 | |
62c6686f | 843 | extern int translate_char P_ ((Lisp_Object, int, int, int, int)); |
f49b37c9 | 844 | extern int split_string P_ ((const unsigned char *, int, int *, |
c04809fb | 845 | unsigned char *, unsigned char *)); |
f49b37c9 | 846 | extern int char_to_string P_ ((int, unsigned char *)); |
e06aa1f9 | 847 | extern int char_to_string_1 P_ ((int, unsigned char *)); |
f49b37c9 | 848 | extern int string_to_char P_ ((const unsigned char *, int, int *)); |
384107f2 | 849 | extern int char_printable_p P_ ((int c)); |
8867de67 | 850 | extern int multibyte_form_length P_ ((const unsigned char *, int)); |
8a25217a KR |
851 | extern void parse_str_as_multibyte P_ ((const unsigned char *, int, int *, |
852 | int *)); | |
6e4dc3e1 | 853 | extern int str_as_multibyte P_ ((unsigned char *, int, int, int *)); |
347abaf7 | 854 | extern int parse_str_to_multibyte P_ ((unsigned char *, int)); |
6e4dc3e1 KH |
855 | extern int str_to_multibyte P_ ((unsigned char *, int, int)); |
856 | extern int str_as_unibyte P_ ((unsigned char *, int)); | |
c04809fb | 857 | extern int get_charset_id P_ ((Lisp_Object)); |
8a25217a | 858 | extern int find_charset_in_text P_ ((const unsigned char *, int, int, int *, |
6e4dc3e1 | 859 | Lisp_Object)); |
c04809fb | 860 | extern int strwidth P_ ((unsigned char *, int)); |
8a25217a | 861 | extern int c_string_width P_ ((const unsigned char *, int, int, int *, int *)); |
417ef8f6 | 862 | extern int lisp_string_width P_ ((Lisp_Object, int, int *, int *)); |
3124bc0e | 863 | extern int char_bytes P_ ((int)); |
c2d1e590 | 864 | extern int char_valid_p P_ ((int, int)); |
2db95897 | 865 | |
9028b39e SM |
866 | EXFUN (Funibyte_char_to_multibyte, 1); |
867 | ||
d74d0ca5 | 868 | extern Lisp_Object Vtranslation_table_vector; |
62c6686f | 869 | |
d74d0ca5 | 870 | /* Return a translation table of id number ID. */ |
62c6686f | 871 | #define GET_TRANSLATION_TABLE(id) \ |
e35efe89 | 872 | (XCDR(XVECTOR(Vtranslation_table_vector)->contents[(id)])) |
c1f6608b | 873 | |
69535a4b KH |
874 | /* A char-table for characters which may invoke auto-filling. */ |
875 | extern Lisp_Object Vauto_fill_chars; | |
876 | ||
c1f6608b KH |
877 | /* Copy LEN bytes from FROM to TO. This macro should be used only |
878 | when a caller knows that LEN is short and the obvious copy loop is | |
6e4dc3e1 KH |
879 | faster than calling bcopy which has some overhead. Copying a |
880 | multibyte sequence of a multibyte character is the typical case. */ | |
c1f6608b KH |
881 | |
882 | #define BCOPY_SHORT(from, to, len) \ | |
883 | do { \ | |
884 | int i = len; \ | |
a9fb257e KR |
885 | const unsigned char *from_p = from; \ |
886 | unsigned char *to_p = to; \ | |
6e4dc3e1 | 887 | while (i--) *to_p++ = *from_p++; \ |
c1f6608b KH |
888 | } while (0) |
889 | ||
aa01a892 | 890 | #endif /* EMACS_CHARSET_H */ |
ab5796a9 MB |
891 | |
892 | /* arch-tag: 3b96db55-4961-481d-ac3e-219f46a2b3aa | |
893 | (do not change this comment) */ |