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0168c3d8 KH |
1 | /* Header for multibyte character handler. |
2 | Copyright (C) 1995, 1997, 1998 Electrotechnical Laboratory, JAPAN. | |
8f924df7 | 3 | Licensed to the Free Software Foundation. |
5df4f04c | 4 | Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
0168c3d8 KH |
5 | National Institute of Advanced Industrial Science and Technology (AIST) |
6 | Registration Number H13PRO009 | |
7 | ||
8 | This file is part of GNU Emacs. | |
9 | ||
b9b1cc14 | 10 | GNU Emacs is free software: you can redistribute it and/or modify |
0168c3d8 | 11 | it under the terms of the GNU General Public License as published by |
b9b1cc14 GM |
12 | the Free Software Foundation, either version 3 of the License, or |
13 | (at your option) any later version. | |
0168c3d8 KH |
14 | |
15 | GNU Emacs is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
b9b1cc14 | 21 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
0168c3d8 KH |
22 | |
23 | #ifndef EMACS_CHARACTER_H | |
24 | #define EMACS_CHARACTER_H | |
25 | ||
885317d8 KH |
26 | /* character code 1st byte byte sequence |
27 | -------------- -------- ------------- | |
28 | 0-7F 00..7F 0xxxxxxx | |
29 | 80-7FF C2..DF 110xxxxx 10xxxxxx | |
30 | 800-FFFF E0..EF 1110xxxx 10xxxxxx 10xxxxxx | |
31 | 10000-1FFFFF F0..F7 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx | |
32 | 200000-3FFF7F F8 11111000 1000xxxx 10xxxxxx 10xxxxxx 10xxxxxx | |
c43e85a9 KH |
33 | 3FFF80-3FFFFF C0..C1 1100000x 10xxxxxx (for eight-bit-char) |
34 | 400000-... invalid | |
0168c3d8 | 35 | |
c43e85a9 KH |
36 | invalid 1st byte 80..BF 10xxxxxx |
37 | F9..FF 11111xxx (xxx != 000) | |
0168c3d8 KH |
38 | */ |
39 | ||
885317d8 | 40 | /* Maximum character code ((1 << CHARACTERBITS) - 1). */ |
0168c3d8 KH |
41 | #define MAX_CHAR 0x3FFFFF |
42 | ||
885317d8 | 43 | /* Maximum Unicode character code. */ |
0168c3d8 KH |
44 | #define MAX_UNICODE_CHAR 0x10FFFF |
45 | ||
885317d8 | 46 | /* Maximum N-byte character codes. */ |
0168c3d8 KH |
47 | #define MAX_1_BYTE_CHAR 0x7F |
48 | #define MAX_2_BYTE_CHAR 0x7FF | |
49 | #define MAX_3_BYTE_CHAR 0xFFFF | |
50 | #define MAX_4_BYTE_CHAR 0x1FFFFF | |
51 | #define MAX_5_BYTE_CHAR 0x3FFF7F | |
52 | ||
3a0a38de KH |
53 | /* Minimum leading code of multibyte characters. */ |
54 | #define MIN_MULTIBYTE_LEADING_CODE 0xC0 | |
55 | /* Maximum leading code of multibyte characters. */ | |
56 | #define MAX_MULTIBYTE_LEADING_CODE 0xF8 | |
57 | ||
8bc28f69 KH |
58 | /* Nonzero iff C is a character that corresponds to a raw 8-bit |
59 | byte. */ | |
60 | #define CHAR_BYTE8_P(c) ((c) > MAX_5_BYTE_CHAR) | |
61 | ||
885317d8 | 62 | /* Return the character code for raw 8-bit byte BYTE. */ |
0168c3d8 | 63 | #define BYTE8_TO_CHAR(byte) ((byte) + 0x3FFF00) |
885317d8 | 64 | |
4c0354d7 SM |
65 | #define UNIBYTE_TO_CHAR(byte) \ |
66 | (ASCII_BYTE_P (byte) ? (byte) : BYTE8_TO_CHAR (byte)) | |
67 | ||
885317d8 | 68 | /* Return the raw 8-bit byte for character C. */ |
8bc28f69 KH |
69 | #define CHAR_TO_BYTE8(c) \ |
70 | (CHAR_BYTE8_P (c) \ | |
71 | ? (c) - 0x3FFF00 \ | |
461c2ab9 | 72 | : multibyte_char_to_unibyte (c)) |
885317d8 | 73 | |
2afc21f5 SM |
74 | /* Return the raw 8-bit byte for character C, |
75 | or -1 if C doesn't correspond to a byte. */ | |
76 | #define CHAR_TO_BYTE_SAFE(c) \ | |
77 | (CHAR_BYTE8_P (c) \ | |
78 | ? (c) - 0x3FFF00 \ | |
455af463 | 79 | : multibyte_char_to_unibyte_safe (c)) |
2afc21f5 | 80 | |
885317d8 KH |
81 | /* Nonzero iff BYTE is the 1st byte of a multibyte form of a character |
82 | that corresponds to a raw 8-bit byte. */ | |
0168c3d8 KH |
83 | #define CHAR_BYTE8_HEAD_P(byte) ((byte) == 0xC0 || (byte) == 0xC1) |
84 | ||
43c47483 KH |
85 | /* If C is not ASCII, make it unibyte. */ |
86 | #define MAKE_CHAR_UNIBYTE(c) \ | |
87 | do { \ | |
88 | if (! ASCII_CHAR_P (c)) \ | |
89 | c = CHAR_TO_BYTE8 (c); \ | |
90 | } while (0) | |
3e411074 | 91 | |
3e411074 | 92 | |
18a2979d | 93 | /* If C is not ASCII, make it multibyte. Assumes C < 256. */ |
c0dc8f64 | 94 | #define MAKE_CHAR_MULTIBYTE(c) \ |
4c0354d7 | 95 | (eassert ((c) >= 0 && (c) < 256), (c) = UNIBYTE_TO_CHAR (c)) |
3e411074 | 96 | |
885317d8 | 97 | /* This is the maximum byte length of multibyte form. */ |
0168c3d8 KH |
98 | #define MAX_MULTIBYTE_LENGTH 5 |
99 | ||
18a2979d | 100 | /* Return a Lisp character whose character code is C. Assumes C is |
b583cead | 101 | a valid character code. */ |
0168c3d8 KH |
102 | #define make_char(c) make_number (c) |
103 | ||
104 | /* Nonzero iff C is an ASCII byte. */ | |
105 | #define ASCII_BYTE_P(c) ((unsigned) (c) < 0x80) | |
106 | ||
107 | /* Nonzero iff X is a character. */ | |
108 | #define CHARACTERP(x) (NATNUMP (x) && XFASTINT (x) <= MAX_CHAR) | |
109 | ||
18a2979d | 110 | /* Nonzero iff C is valid as a character code. GENERICP is not used. */ |
885317d8 | 111 | #define CHAR_VALID_P(c, genericp) ((unsigned) (c) <= MAX_CHAR) |
0168c3d8 KH |
112 | |
113 | /* Check if Lisp object X is a character or not. */ | |
63db3c1b MB |
114 | #define CHECK_CHARACTER(x) \ |
115 | CHECK_TYPE (CHARACTERP (x), Qcharacterp, x) | |
0168c3d8 | 116 | |
8f924df7 KH |
117 | #define CHECK_CHARACTER_CAR(x) \ |
118 | do { \ | |
119 | Lisp_Object tmp = XCAR (x); \ | |
120 | CHECK_CHARACTER (tmp); \ | |
121 | XSETCAR ((x), tmp); \ | |
122 | } while (0) | |
123 | ||
124 | #define CHECK_CHARACTER_CDR(x) \ | |
125 | do { \ | |
126 | Lisp_Object tmp = XCDR (x); \ | |
127 | CHECK_CHARACTER (tmp); \ | |
128 | XSETCDR ((x), tmp); \ | |
129 | } while (0) | |
130 | ||
0168c3d8 KH |
131 | /* Nonzero iff C is a character of code less than 0x100. */ |
132 | #define SINGLE_BYTE_CHAR_P(c) ((unsigned) (c) < 0x100) | |
133 | ||
134 | /* Nonzero if character C has a printable glyph. */ | |
135 | #define CHAR_PRINTABLE_P(c) \ | |
944c7a26 AS |
136 | (((c) >= 32 && (c) < 127) \ |
137 | || ! NILP (CHAR_TABLE_REF (Vprintable_chars, (c)))) | |
0168c3d8 | 138 | |
885317d8 | 139 | /* Return byte length of multibyte form for character C. */ |
0168c3d8 KH |
140 | #define CHAR_BYTES(c) \ |
141 | ( (c) <= MAX_1_BYTE_CHAR ? 1 \ | |
142 | : (c) <= MAX_2_BYTE_CHAR ? 2 \ | |
143 | : (c) <= MAX_3_BYTE_CHAR ? 3 \ | |
144 | : (c) <= MAX_4_BYTE_CHAR ? 4 \ | |
145 | : (c) <= MAX_5_BYTE_CHAR ? 5 \ | |
146 | : 2) | |
147 | ||
43c47483 KH |
148 | |
149 | /* Return the leading code of multibyte form of C. */ | |
150 | #define CHAR_LEADING_CODE(c) \ | |
151 | ((c) <= MAX_1_BYTE_CHAR ? c \ | |
152 | : (c) <= MAX_2_BYTE_CHAR ? (0xC0 | ((c) >> 6)) \ | |
153 | : (c) <= MAX_3_BYTE_CHAR ? (0xE0 | ((c) >> 12)) \ | |
154 | : (c) <= MAX_4_BYTE_CHAR ? (0xF0 | ((c) >> 18)) \ | |
155 | : (c) <= MAX_5_BYTE_CHAR ? 0xF8 \ | |
156 | : (0xC0 | (((c) >> 6) & 0x01))) | |
157 | ||
158 | ||
885317d8 KH |
159 | /* Store multibyte form of the character C in P. The caller should |
160 | allocate at least MAX_MULTIBYTE_LENGTH bytes area at P in advance. | |
161 | Returns the length of the multibyte form. */ | |
0168c3d8 KH |
162 | |
163 | #define CHAR_STRING(c, p) \ | |
164 | ((unsigned) (c) <= MAX_1_BYTE_CHAR \ | |
165 | ? ((p)[0] = (c), \ | |
166 | 1) \ | |
167 | : (unsigned) (c) <= MAX_2_BYTE_CHAR \ | |
168 | ? ((p)[0] = (0xC0 | ((c) >> 6)), \ | |
169 | (p)[1] = (0x80 | ((c) & 0x3F)), \ | |
170 | 2) \ | |
171 | : (unsigned) (c) <= MAX_3_BYTE_CHAR \ | |
172 | ? ((p)[0] = (0xE0 | ((c) >> 12)), \ | |
173 | (p)[1] = (0x80 | (((c) >> 6) & 0x3F)), \ | |
174 | (p)[2] = (0x80 | ((c) & 0x3F)), \ | |
175 | 3) \ | |
f958a2fa | 176 | : char_string ((unsigned) c, p)) |
0168c3d8 | 177 | |
eb41da4c KH |
178 | /* Store multibyte form of byte B in P. The caller should allocate at |
179 | least MAX_MULTIBYTE_LENGTH bytes area at P in advance. Returns the | |
180 | length of the multibyte form. */ | |
1106ea2b KH |
181 | |
182 | #define BYTE8_STRING(b, p) \ | |
183 | ((p)[0] = (0xC0 | (((b) >> 6) & 0x01)), \ | |
7f464917 | 184 | (p)[1] = (0x80 | ((b) & 0x3F)), \ |
1106ea2b KH |
185 | 2) |
186 | ||
0168c3d8 | 187 | |
18a2979d EZ |
188 | /* Store multibyte form of the character C in P and advance P to the |
189 | end of the multibyte form. The caller should allocate at least | |
190 | MAX_MULTIBYTE_LENGTH bytes area at P in advance. */ | |
0168c3d8 | 191 | |
eb41da4c KH |
192 | #define CHAR_STRING_ADVANCE(c, p) \ |
193 | do { \ | |
194 | if ((c) <= MAX_1_BYTE_CHAR) \ | |
195 | *(p)++ = (c); \ | |
196 | else if ((c) <= MAX_2_BYTE_CHAR) \ | |
197 | *(p)++ = (0xC0 | ((c) >> 6)), \ | |
198 | *(p)++ = (0x80 | ((c) & 0x3F)); \ | |
199 | else if ((c) <= MAX_3_BYTE_CHAR) \ | |
200 | *(p)++ = (0xE0 | ((c) >> 12)), \ | |
201 | *(p)++ = (0x80 | (((c) >> 6) & 0x3F)), \ | |
202 | *(p)++ = (0x80 | ((c) & 0x3F)); \ | |
203 | else \ | |
204 | (p) += char_string ((c), (p)); \ | |
885317d8 | 205 | } while (0) |
0168c3d8 | 206 | |
eb41da4c | 207 | |
0168c3d8 KH |
208 | /* Nonzero iff BYTE starts a non-ASCII character in a multibyte |
209 | form. */ | |
210 | #define LEADING_CODE_P(byte) (((byte) & 0xC0) == 0xC0) | |
211 | ||
b5c7dbe6 KH |
212 | /* Nonzero iff BYTE is a trailing code of a non-ASCII character in a |
213 | multibyte form. */ | |
214 | #define TRAILING_CODE_P(byte) (((byte) & 0xC0) == 0x80) | |
215 | ||
885317d8 KH |
216 | /* Nonzero iff BYTE starts a character in a multibyte form. |
217 | This is equivalent to: | |
218 | (ASCII_BYTE_P (byte) || LEADING_CODE_P (byte)) */ | |
219 | #define CHAR_HEAD_P(byte) (((byte) & 0xC0) != 0x80) | |
220 | ||
0168c3d8 KH |
221 | /* How many bytes a character that starts with BYTE occupies in a |
222 | multibyte form. */ | |
223 | #define BYTES_BY_CHAR_HEAD(byte) \ | |
224 | (!((byte) & 0x80) ? 1 \ | |
225 | : !((byte) & 0x20) ? 2 \ | |
226 | : !((byte) & 0x10) ? 3 \ | |
227 | : !((byte) & 0x08) ? 4 \ | |
228 | : 5) | |
229 | ||
230 | ||
0168c3d8 | 231 | /* The byte length of multibyte form at unibyte string P ending at |
18a2979d | 232 | PEND. If STR doesn't point to a valid multibyte form, return 0. */ |
0168c3d8 KH |
233 | |
234 | #define MULTIBYTE_LENGTH(p, pend) \ | |
235 | (p >= pend ? 0 \ | |
236 | : !((p)[0] & 0x80) ? 1 \ | |
237 | : ((p + 1 >= pend) || (((p)[1] & 0xC0) != 0x80)) ? 0 \ | |
238 | : ((p)[0] & 0xE0) == 0xC0 ? 2 \ | |
239 | : ((p + 2 >= pend) || (((p)[2] & 0xC0) != 0x80)) ? 0 \ | |
240 | : ((p)[0] & 0xF0) == 0xE0 ? 3 \ | |
241 | : ((p + 3 >= pend) || (((p)[3] & 0xC0) != 0x80)) ? 0 \ | |
242 | : ((p)[0] & 0xF8) == 0xF0 ? 4 \ | |
243 | : ((p + 4 >= pend) || (((p)[4] & 0xC0) != 0x80)) ? 0 \ | |
244 | : (p)[0] == 0xF8 && ((p)[1] & 0xF0) == 0x80 ? 5 \ | |
245 | : 0) | |
246 | ||
247 | ||
18a2979d | 248 | /* Like MULTIBYTE_LENGTH, but don't check the ending address. */ |
0168c3d8 KH |
249 | |
250 | #define MULTIBYTE_LENGTH_NO_CHECK(p) \ | |
251 | (!((p)[0] & 0x80) ? 1 \ | |
252 | : ((p)[1] & 0xC0) != 0x80 ? 0 \ | |
253 | : ((p)[0] & 0xE0) == 0xC0 ? 2 \ | |
254 | : ((p)[2] & 0xC0) != 0x80 ? 0 \ | |
255 | : ((p)[0] & 0xF0) == 0xE0 ? 3 \ | |
256 | : ((p)[3] & 0xC0) != 0x80 ? 0 \ | |
257 | : ((p)[0] & 0xF8) == 0xF0 ? 4 \ | |
258 | : ((p)[4] & 0xC0) != 0x80 ? 0 \ | |
259 | : (p)[0] == 0xF8 && ((p)[1] & 0xF0) == 0x80 ? 5 \ | |
260 | : 0) | |
261 | ||
18a2979d EZ |
262 | /* If P is before LIMIT, advance P to the next character boundary. |
263 | Assumes that P is already at a character boundary of the same | |
78edd3b7 | 264 | multibyte form whose end address is LIMIT. */ |
8f924df7 KH |
265 | |
266 | #define NEXT_CHAR_BOUNDARY(p, limit) \ | |
267 | do { \ | |
268 | if ((p) < (limit)) \ | |
269 | (p) += BYTES_BY_CHAR_HEAD (*(p)); \ | |
270 | } while (0) | |
271 | ||
272 | ||
273 | /* If P is after LIMIT, advance P to the previous character boundary. | |
18a2979d | 274 | Assumes that P is already at a character boundary of the same |
ce5b453a | 275 | multibyte form whose beginning address is LIMIT. */ |
8f924df7 KH |
276 | |
277 | #define PREV_CHAR_BOUNDARY(p, limit) \ | |
278 | do { \ | |
279 | if ((p) > (limit)) \ | |
280 | { \ | |
760fbc2c | 281 | const unsigned char *chp = (p); \ |
8f924df7 | 282 | do { \ |
760fbc2c PE |
283 | chp--; \ |
284 | } while (chp >= limit && ! CHAR_HEAD_P (*chp)); \ | |
285 | (p) = (BYTES_BY_CHAR_HEAD (*chp) == (p) - chp) ? chp : (p) - 1; \ | |
8f924df7 KH |
286 | } \ |
287 | } while (0) | |
0168c3d8 KH |
288 | |
289 | /* Return the character code of character whose multibyte form is at | |
62a6e103 | 290 | P. */ |
0168c3d8 | 291 | |
62a6e103 | 292 | #define STRING_CHAR(p) \ |
0168c3d8 KH |
293 | (!((p)[0] & 0x80) \ |
294 | ? (p)[0] \ | |
295 | : ! ((p)[0] & 0x20) \ | |
296 | ? (((((p)[0] & 0x1F) << 6) \ | |
297 | | ((p)[1] & 0x3F)) \ | |
298 | + (((unsigned char) (p)[0]) < 0xC2 ? 0x3FFF80 : 0)) \ | |
299 | : ! ((p)[0] & 0x10) \ | |
300 | ? ((((p)[0] & 0x0F) << 12) \ | |
301 | | (((p)[1] & 0x3F) << 6) \ | |
302 | | ((p)[2] & 0x3F)) \ | |
eb41da4c | 303 | : string_char ((p), NULL, NULL)) |
0168c3d8 KH |
304 | |
305 | ||
18a2979d | 306 | /* Like STRING_CHAR, but set ACTUAL_LEN to the length of multibyte |
62a6e103 | 307 | form. */ |
0168c3d8 | 308 | |
62a6e103 | 309 | #define STRING_CHAR_AND_LENGTH(p, actual_len) \ |
0168c3d8 KH |
310 | (!((p)[0] & 0x80) \ |
311 | ? ((actual_len) = 1, (p)[0]) \ | |
312 | : ! ((p)[0] & 0x20) \ | |
313 | ? ((actual_len) = 2, \ | |
314 | (((((p)[0] & 0x1F) << 6) \ | |
315 | | ((p)[1] & 0x3F)) \ | |
316 | + (((unsigned char) (p)[0]) < 0xC2 ? 0x3FFF80 : 0))) \ | |
317 | : ! ((p)[0] & 0x10) \ | |
318 | ? ((actual_len) = 3, \ | |
319 | ((((p)[0] & 0x0F) << 12) \ | |
320 | | (((p)[1] & 0x3F) << 6) \ | |
321 | | ((p)[2] & 0x3F))) \ | |
eb41da4c | 322 | : string_char ((p), NULL, &actual_len)) |
0168c3d8 KH |
323 | |
324 | ||
18a2979d | 325 | /* Like STRING_CHAR, but advance P to the end of multibyte form. */ |
0168c3d8 KH |
326 | |
327 | #define STRING_CHAR_ADVANCE(p) \ | |
328 | (!((p)[0] & 0x80) \ | |
329 | ? *(p)++ \ | |
330 | : ! ((p)[0] & 0x20) \ | |
331 | ? ((p) += 2, \ | |
332 | ((((p)[-2] & 0x1F) << 6) \ | |
333 | | ((p)[-1] & 0x3F) \ | |
8f924df7 | 334 | | ((unsigned char) ((p)[-2]) < 0xC2 ? 0x3FFF80 : 0))) \ |
0168c3d8 KH |
335 | : ! ((p)[0] & 0x10) \ |
336 | ? ((p) += 3, \ | |
337 | ((((p)[-3] & 0x0F) << 12) \ | |
338 | | (((p)[-2] & 0x3F) << 6) \ | |
339 | | ((p)[-1] & 0x3F))) \ | |
eb41da4c | 340 | : string_char ((p), &(p), NULL)) |
0168c3d8 KH |
341 | |
342 | ||
343 | /* Fetch the "next" character from Lisp string STRING at byte position | |
344 | BYTEIDX, character position CHARIDX. Store it into OUTPUT. | |
345 | ||
346 | All the args must be side-effect-free. | |
347 | BYTEIDX and CHARIDX must be lvalues; | |
348 | we increment them past the character fetched. */ | |
349 | ||
350 | #define FETCH_STRING_CHAR_ADVANCE(OUTPUT, STRING, CHARIDX, BYTEIDX) \ | |
a1c2ac9a | 351 | do \ |
0168c3d8 KH |
352 | { \ |
353 | CHARIDX++; \ | |
354 | if (STRING_MULTIBYTE (STRING)) \ | |
355 | { \ | |
760fbc2c PE |
356 | unsigned char *chp = &SDATA (STRING)[BYTEIDX]; \ |
357 | int chlen; \ | |
0168c3d8 | 358 | \ |
760fbc2c PE |
359 | OUTPUT = STRING_CHAR_AND_LENGTH (chp, chlen); \ |
360 | BYTEIDX += chlen; \ | |
0168c3d8 KH |
361 | } \ |
362 | else \ | |
f1c99628 SM |
363 | { \ |
364 | OUTPUT = SREF (STRING, BYTEIDX); \ | |
365 | BYTEIDX++; \ | |
366 | } \ | |
0168c3d8 | 367 | } \ |
a1c2ac9a | 368 | while (0) |
0168c3d8 | 369 | |
18a2979d EZ |
370 | /* Like FETCH_STRING_CHAR_ADVANCE, but return a multibyte character |
371 | even if STRING is unibyte. */ | |
43c47483 KH |
372 | |
373 | #define FETCH_STRING_CHAR_AS_MULTIBYTE_ADVANCE(OUTPUT, STRING, CHARIDX, BYTEIDX) \ | |
a1c2ac9a | 374 | do \ |
43c47483 KH |
375 | { \ |
376 | CHARIDX++; \ | |
377 | if (STRING_MULTIBYTE (STRING)) \ | |
378 | { \ | |
760fbc2c PE |
379 | unsigned char *chp = &SDATA (STRING)[BYTEIDX]; \ |
380 | int chlen; \ | |
43c47483 | 381 | \ |
760fbc2c PE |
382 | OUTPUT = STRING_CHAR_AND_LENGTH (chp, chlen); \ |
383 | BYTEIDX += chlen; \ | |
43c47483 KH |
384 | } \ |
385 | else \ | |
386 | { \ | |
f1c99628 SM |
387 | OUTPUT = SREF (STRING, BYTEIDX); \ |
388 | BYTEIDX++; \ | |
43c47483 KH |
389 | MAKE_CHAR_MULTIBYTE (OUTPUT); \ |
390 | } \ | |
391 | } \ | |
a1c2ac9a | 392 | while (0) |
43c47483 | 393 | |
0168c3d8 | 394 | |
18a2979d | 395 | /* Like FETCH_STRING_CHAR_ADVANCE, but assumes STRING is multibyte. */ |
0168c3d8 KH |
396 | |
397 | #define FETCH_STRING_CHAR_ADVANCE_NO_CHECK(OUTPUT, STRING, CHARIDX, BYTEIDX) \ | |
a1c2ac9a | 398 | do \ |
0168c3d8 | 399 | { \ |
a6670b0b PE |
400 | unsigned char *fetch_ptr = &SDATA (STRING)[BYTEIDX]; \ |
401 | int fetch_len; \ | |
0168c3d8 | 402 | \ |
a6670b0b PE |
403 | OUTPUT = STRING_CHAR_AND_LENGTH (fetch_ptr, fetch_len); \ |
404 | BYTEIDX += fetch_len; \ | |
0168c3d8 KH |
405 | CHARIDX++; \ |
406 | } \ | |
a1c2ac9a | 407 | while (0) |
0168c3d8 KH |
408 | |
409 | ||
18a2979d | 410 | /* Like FETCH_STRING_CHAR_ADVANCE, but fetch character from the current |
0168c3d8 KH |
411 | buffer. */ |
412 | ||
413 | #define FETCH_CHAR_ADVANCE(OUTPUT, CHARIDX, BYTEIDX) \ | |
a1c2ac9a | 414 | do \ |
0168c3d8 KH |
415 | { \ |
416 | CHARIDX++; \ | |
4b4deea2 | 417 | if (!NILP (BVAR (current_buffer, enable_multibyte_characters))) \ |
0168c3d8 | 418 | { \ |
760fbc2c PE |
419 | unsigned char *chp = BYTE_POS_ADDR (BYTEIDX); \ |
420 | int chlen; \ | |
0168c3d8 | 421 | \ |
760fbc2c PE |
422 | OUTPUT= STRING_CHAR_AND_LENGTH (chp, chlen); \ |
423 | BYTEIDX += chlen; \ | |
0168c3d8 KH |
424 | } \ |
425 | else \ | |
426 | { \ | |
427 | OUTPUT = *(BYTE_POS_ADDR (BYTEIDX)); \ | |
428 | BYTEIDX++; \ | |
429 | } \ | |
430 | } \ | |
a1c2ac9a | 431 | while (0) |
0168c3d8 KH |
432 | |
433 | ||
18a2979d | 434 | /* Like FETCH_CHAR_ADVANCE, but assumes the current buffer is multibyte. */ |
0168c3d8 KH |
435 | |
436 | #define FETCH_CHAR_ADVANCE_NO_CHECK(OUTPUT, CHARIDX, BYTEIDX) \ | |
a1c2ac9a | 437 | do \ |
0168c3d8 | 438 | { \ |
760fbc2c PE |
439 | unsigned char *chp = BYTE_POS_ADDR (BYTEIDX); \ |
440 | int chlen; \ | |
0168c3d8 | 441 | \ |
760fbc2c PE |
442 | OUTPUT = STRING_CHAR_AND_LENGTH (chp, chlen); \ |
443 | BYTEIDX += chlen; \ | |
0168c3d8 KH |
444 | CHARIDX++; \ |
445 | } \ | |
a1c2ac9a | 446 | while (0) |
0168c3d8 KH |
447 | |
448 | ||
18a2979d | 449 | /* Increment the buffer byte position POS_BYTE of the current buffer to |
0168c3d8 KH |
450 | the next character boundary. No range checking of POS. */ |
451 | ||
452 | #define INC_POS(pos_byte) \ | |
453 | do { \ | |
760fbc2c PE |
454 | unsigned char *chp = BYTE_POS_ADDR (pos_byte); \ |
455 | pos_byte += BYTES_BY_CHAR_HEAD (*chp); \ | |
0168c3d8 KH |
456 | } while (0) |
457 | ||
458 | ||
18a2979d | 459 | /* Decrement the buffer byte position POS_BYTE of the current buffer to |
0168c3d8 KH |
460 | the previous character boundary. No range checking of POS. */ |
461 | ||
462 | #define DEC_POS(pos_byte) \ | |
463 | do { \ | |
760fbc2c | 464 | unsigned char *chp; \ |
0168c3d8 KH |
465 | \ |
466 | pos_byte--; \ | |
467 | if (pos_byte < GPT_BYTE) \ | |
760fbc2c | 468 | chp = BEG_ADDR + pos_byte - BEG_BYTE; \ |
0168c3d8 | 469 | else \ |
760fbc2c PE |
470 | chp = BEG_ADDR + GAP_SIZE + pos_byte - BEG_BYTE; \ |
471 | while (!CHAR_HEAD_P (*chp)) \ | |
0168c3d8 | 472 | { \ |
760fbc2c | 473 | chp--; \ |
0168c3d8 KH |
474 | pos_byte--; \ |
475 | } \ | |
476 | } while (0) | |
477 | ||
478 | /* Increment both CHARPOS and BYTEPOS, each in the appropriate way. */ | |
479 | ||
480 | #define INC_BOTH(charpos, bytepos) \ | |
481 | do \ | |
482 | { \ | |
483 | (charpos)++; \ | |
4b4deea2 | 484 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) \ |
0168c3d8 KH |
485 | (bytepos)++; \ |
486 | else \ | |
487 | INC_POS ((bytepos)); \ | |
488 | } \ | |
489 | while (0) | |
490 | ||
491 | ||
492 | /* Decrement both CHARPOS and BYTEPOS, each in the appropriate way. */ | |
493 | ||
494 | #define DEC_BOTH(charpos, bytepos) \ | |
495 | do \ | |
496 | { \ | |
497 | (charpos)--; \ | |
4b4deea2 | 498 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) \ |
0168c3d8 KH |
499 | (bytepos)--; \ |
500 | else \ | |
501 | DEC_POS ((bytepos)); \ | |
502 | } \ | |
503 | while (0) | |
504 | ||
505 | ||
18a2979d | 506 | /* Increment the buffer byte position POS_BYTE of the current buffer to |
0168c3d8 KH |
507 | the next character boundary. This macro relies on the fact that |
508 | *GPT_ADDR and *Z_ADDR are always accessible and the values are | |
509 | '\0'. No range checking of POS_BYTE. */ | |
510 | ||
511 | #define BUF_INC_POS(buf, pos_byte) \ | |
512 | do { \ | |
760fbc2c PE |
513 | unsigned char *chp = BUF_BYTE_ADDRESS (buf, pos_byte); \ |
514 | pos_byte += BYTES_BY_CHAR_HEAD (*chp); \ | |
0168c3d8 KH |
515 | } while (0) |
516 | ||
517 | ||
18a2979d | 518 | /* Decrement the buffer byte position POS_BYTE of the current buffer to |
0168c3d8 KH |
519 | the previous character boundary. No range checking of POS_BYTE. */ |
520 | ||
521 | #define BUF_DEC_POS(buf, pos_byte) \ | |
522 | do { \ | |
760fbc2c | 523 | unsigned char *chp; \ |
0168c3d8 KH |
524 | pos_byte--; \ |
525 | if (pos_byte < BUF_GPT_BYTE (buf)) \ | |
760fbc2c | 526 | chp = BUF_BEG_ADDR (buf) + pos_byte - BEG_BYTE; \ |
0168c3d8 | 527 | else \ |
760fbc2c PE |
528 | chp = BUF_BEG_ADDR (buf) + BUF_GAP_SIZE (buf) + pos_byte - BEG_BYTE;\ |
529 | while (!CHAR_HEAD_P (*chp)) \ | |
0168c3d8 | 530 | { \ |
760fbc2c | 531 | chp--; \ |
0168c3d8 KH |
532 | pos_byte--; \ |
533 | } \ | |
534 | } while (0) | |
535 | ||
536 | ||
b583cead KH |
537 | /* If C is a character to be unified with a Unicode character, return |
538 | the unified Unicode character. */ | |
539 | ||
55870ffc KH |
540 | #define MAYBE_UNIFY_CHAR(c) \ |
541 | do { \ | |
542 | if (c > MAX_UNICODE_CHAR && c <= MAX_5_BYTE_CHAR) \ | |
543 | { \ | |
544 | Lisp_Object val; \ | |
545 | val = CHAR_TABLE_REF (Vchar_unify_table, c); \ | |
546 | if (INTEGERP (val)) \ | |
547 | c = XINT (val); \ | |
548 | else if (! NILP (val)) \ | |
549 | c = maybe_unify_char (c, val); \ | |
550 | } \ | |
551 | } while (0) | |
0168c3d8 | 552 | |
fc9d9d2a | 553 | |
0168c3d8 | 554 | /* Return the width of ASCII character C. The width is measured by |
18a2979d | 555 | how many columns C will occupy on the screen when displayed in the |
0168c3d8 KH |
556 | current buffer. */ |
557 | ||
558 | #define ASCII_CHAR_WIDTH(c) \ | |
559 | (c < 0x20 \ | |
560 | ? (c == '\t' \ | |
4b4deea2 TT |
561 | ? XFASTINT (BVAR (current_buffer, tab_width)) \ |
562 | : (c == '\n' ? 0 : (NILP (BVAR (current_buffer, ctl_arrow)) ? 4 : 2))) \ | |
0168c3d8 KH |
563 | : (c < 0x7f \ |
564 | ? 1 \ | |
4b4deea2 | 565 | : ((NILP (BVAR (current_buffer, ctl_arrow)) ? 4 : 2)))) |
0168c3d8 KH |
566 | |
567 | /* Return the width of character C. The width is measured by how many | |
18a2979d | 568 | columns C will occupy on the screen when displayed in the current |
0168c3d8 KH |
569 | buffer. */ |
570 | ||
571 | #define CHAR_WIDTH(c) \ | |
572 | (ASCII_CHAR_P (c) \ | |
573 | ? ASCII_CHAR_WIDTH (c) \ | |
574 | : XINT (CHAR_TABLE_REF (Vchar_width_table, c))) | |
575 | ||
c19cab20 KH |
576 | /* If C is a variation selector, return the index numnber of the |
577 | variation selector (1..256). Otherwise, return 0. */ | |
578 | ||
579 | #define CHAR_VARIATION_SELECTOR_P(c) \ | |
580 | ((c) < 0xFE00 ? 0 \ | |
581 | : (c) <= 0xFE0F ? (c) - 0xFE00 + 1 \ | |
582 | : (c) < 0xE0100 ? 0 \ | |
583 | : (c) <= 0xE01EF ? (c) - 0xE0100 + 17 \ | |
584 | : 0) | |
585 | ||
586 | /* If C is a high surrogate, return 1. If C is a low surrogate, | |
409f2919 | 587 | return 0. Otherwise, return 0. */ |
c19cab20 KH |
588 | |
589 | #define CHAR_SURROGATE_PAIR_P(c) \ | |
590 | ((c) < 0xD800 ? 0 \ | |
591 | : (c) <= 0xDBFF ? 1 \ | |
592 | : (c) <= 0xDFFF ? 2 \ | |
593 | : 0) | |
594 | ||
595 | ||
383e0970 J |
596 | extern int char_resolve_modifier_mask (int); |
597 | extern int char_string (unsigned, unsigned char *); | |
598 | extern int string_char (const unsigned char *, | |
599 | const unsigned char **, int *); | |
600 | ||
601 | extern int translate_char (Lisp_Object, int c); | |
602 | extern int char_printable_p (int c); | |
14162469 EZ |
603 | extern void parse_str_as_multibyte (const unsigned char *, |
604 | EMACS_INT, EMACS_INT *, EMACS_INT *); | |
de883a70 | 605 | extern EMACS_INT count_size_as_multibyte (const unsigned char *, EMACS_INT); |
14162469 EZ |
606 | extern EMACS_INT str_as_multibyte (unsigned char *, EMACS_INT, EMACS_INT, |
607 | EMACS_INT *); | |
608 | extern EMACS_INT str_to_multibyte (unsigned char *, EMACS_INT, EMACS_INT); | |
609 | extern EMACS_INT str_as_unibyte (unsigned char *, EMACS_INT); | |
383e0970 J |
610 | extern EMACS_INT str_to_unibyte (const unsigned char *, unsigned char *, |
611 | EMACS_INT, int); | |
7469ef5d | 612 | extern EMACS_INT strwidth (const char *, EMACS_INT); |
579c18d0 EZ |
613 | extern EMACS_INT c_string_width (const unsigned char *, EMACS_INT, int, |
614 | EMACS_INT *, EMACS_INT *); | |
2b4560a8 | 615 | extern EMACS_INT lisp_string_width (Lisp_Object, EMACS_INT, |
579c18d0 | 616 | EMACS_INT *, EMACS_INT *); |
0168c3d8 | 617 | |
955cbe7b | 618 | extern Lisp_Object Qcharacterp; |
0168c3d8 | 619 | extern Lisp_Object Vchar_unify_table; |
383e0970 | 620 | extern Lisp_Object string_escape_byte8 (Lisp_Object); |
fac2bdc4 | 621 | |
0168c3d8 KH |
622 | /* Return a translation table of id number ID. */ |
623 | #define GET_TRANSLATION_TABLE(id) \ | |
624 | (XCDR(XVECTOR(Vtranslation_table_vector)->contents[(id)])) | |
625 | ||
0168c3d8 | 626 | #define DEFSYM(sym, name) \ |
5e2327cf | 627 | do { (sym) = intern_c_string ((name)); staticpro (&(sym)); } while (0) |
0168c3d8 KH |
628 | |
629 | #endif /* EMACS_CHARACTER_H */ |