source: vendor/bash/3.1-p17/include/shmbutil.h

Last change on this file was 3231, checked in by bird, 18 years ago

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1/* shmbutil.h -- utility functions for multibyte characters. */
2
3/* Copyright (C) 2002-2004 Free Software Foundation, Inc.
4
5 This file is part of GNU Bash, the Bourne Again SHell.
6
7 Bash is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
10 version.
11
12 Bash is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 You should have received a copy of the GNU General Public License along
18 with Bash; see the file COPYING. If not, write to the Free Software
19 Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
20
21#if !defined (_SH_MBUTIL_H_)
22#define _SH_MBUTIL_H_
23
24#include "stdc.h"
25
26/* Include config.h for HANDLE_MULTIBYTE */
27#include <config.h>
28
29#if defined (HANDLE_MULTIBYTE)
30
31extern size_t xmbsrtowcs __P((wchar_t *, const char **, size_t, mbstate_t *));
32extern size_t xdupmbstowcs __P((wchar_t **, char ***, const char *));
33
34extern size_t mbstrlen __P((const char *));
35
36extern char *xstrchr __P((const char *, int));
37
38#ifndef MB_INVALIDCH
39#define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2)
40#define MB_NULLWCH(x) ((x) == 0)
41#endif
42
43#define MBSLEN(s) (((s) && (s)[0]) ? ((s)[1] ? mbstrlen (s) : 1) : 0)
44#define MB_STRLEN(s) ((MB_CUR_MAX > 1) ? MBSLEN (s) : STRLEN (s))
45
46#define MBLEN(s, n) ((MB_CUR_MAX > 1) ? mblen ((s), (n)) : 1)
47#define MBRLEN(s, n, p) ((MB_CUR_MAX > 1) ? mbrlen ((s), (n), (p)) : 1)
48
49#else /* !HANDLE_MULTIBYTE */
50
51#undef MB_LEN_MAX
52#undef MB_CUR_MAX
53
54#define MB_LEN_MAX 1
55#define MB_CUR_MAX 1
56
57#undef xstrchr
58#define xstrchr(s, c) strchr(s, c)
59
60#ifndef MB_INVALIDCH
61#define MB_INVALIDCH(x) (0)
62#define MB_NULLWCH(x) (0)
63#endif
64
65#define MB_STRLEN(s) (STRLEN(s))
66
67#define MBLEN(s, n) 1
68#define MBRLEN(s, n, p) 1
69
70#endif /* !HANDLE_MULTIBYTE */
71
72/* Declare and initialize a multibyte state. Call must be terminated
73 with `;'. */
74#if defined (HANDLE_MULTIBYTE)
75# define DECLARE_MBSTATE \
76 mbstate_t state; \
77 memset (&state, '\0', sizeof (mbstate_t))
78#else
79# define DECLARE_MBSTATE
80#endif /* !HANDLE_MULTIBYTE */
81
82/* Initialize or reinitialize a multibyte state named `state'. Call must be
83 terminated with `;'. */
84#if defined (HANDLE_MULTIBYTE)
85# define INITIALIZE_MBSTATE memset (&state, '\0', sizeof (mbstate_t))
86#else
87# define INITIALIZE_MBSTATE
88#endif /* !HANDLE_MULTIBYTE */
89
90/* Advance one (possibly multi-byte) character in string _STR of length
91 _STRSIZE, starting at index _I. STATE must have already been declared. */
92#if defined (HANDLE_MULTIBYTE)
93# define ADVANCE_CHAR(_str, _strsize, _i) \
94 do \
95 { \
96 if (MB_CUR_MAX > 1) \
97 { \
98 mbstate_t state_bak; \
99 size_t mblength; \
100\
101 state_bak = state; \
102 mblength = mbrlen ((_str) + (_i), (_strsize) - (_i), &state); \
103\
104 if (mblength == (size_t)-2 || mblength == (size_t)-1) \
105 { \
106 state = state_bak; \
107 (_i)++; \
108 } \
109 else if (mblength == 0) \
110 (_i)++; \
111 else \
112 (_i) += mblength; \
113 } \
114 else \
115 (_i)++; \
116 } \
117 while (0)
118#else
119# define ADVANCE_CHAR(_str, _strsize, _i) (_i)++
120#endif /* !HANDLE_MULTIBYTE */
121
122/* Advance one (possibly multibyte) character in the string _STR of length
123 _STRSIZE.
124 SPECIAL: assume that _STR will be incremented by 1 after this call. */
125#if defined (HANDLE_MULTIBYTE)
126# define ADVANCE_CHAR_P(_str, _strsize) \
127 do \
128 { \
129 if (MB_CUR_MAX > 1) \
130 { \
131 mbstate_t state_bak; \
132 size_t mblength; \
133\
134 state_bak = state; \
135 mblength = mbrlen ((_str), (_strsize), &state); \
136\
137 if (mblength == (size_t)-2 || mblength == (size_t)-1) \
138 { \
139 state = state_bak; \
140 mblength = 1; \
141 } \
142 else \
143 (_str) += (mblength < 1) ? 0 : (mblength - 1); \
144 } \
145 } \
146 while (0)
147#else
148# define ADVANCE_CHAR_P(_str, _strsize)
149#endif /* !HANDLE_MULTIBYTE */
150
151/* Back up one (possibly multi-byte) character in string _STR of length
152 _STRSIZE, starting at index _I. STATE must have already been declared. */
153#if defined (HANDLE_MULTIBYTE)
154# define BACKUP_CHAR(_str, _strsize, _i) \
155 do \
156 { \
157 if (MB_CUR_MAX > 1) \
158 { \
159 mbstate_t state_bak; \
160 size_t mblength; \
161 int _x, _p; /* _x == temp index into string, _p == prev index */ \
162\
163 _x = _p = 0; \
164 while (_x < (_i)) \
165 { \
166 state_bak = state; \
167 mblength = mbrlen ((_str) + (_x), (_strsize) - (_x), &state); \
168\
169 if (mblength == (size_t)-2 || mblength == (size_t)-1) \
170 { \
171 state = state_bak; \
172 _x++; \
173 } \
174 else if (mblength == 0) \
175 _x++; \
176 else \
177 { \
178 _p = _x; /* _p == start of prev mbchar */ \
179 _x += mblength; \
180 } \
181 } \
182 (_i) = _p; \
183 } \
184 else \
185 (_i)--; \
186 } \
187 while (0)
188#else
189# define BACKUP_CHAR(_str, _strsize, _i) (_i)--
190#endif /* !HANDLE_MULTIBYTE */
191
192/* Back up one (possibly multibyte) character in the string _BASE of length
193 _STRSIZE starting at _STR (_BASE <= _STR <= (_BASE + _STRSIZE) ).
194 SPECIAL: DO NOT assume that _STR will be decremented by 1 after this call. */
195#if defined (HANDLE_MULTIBYTE)
196# define BACKUP_CHAR_P(_base, _strsize, _str) \
197 do \
198 { \
199 if (MB_CUR_MAX > 1) \
200 { \
201 mbstate_t state_bak; \
202 size_t mblength; \
203 char *_x, _p; /* _x == temp pointer into string, _p == prev pointer */ \
204\
205 _x = _p = _base; \
206 while (_x < (_str)) \
207 { \
208 state_bak = state; \
209 mblength = mbrlen (_x, (_strsize) - _x, &state); \
210\
211 if (mblength == (size_t)-2 || mblength == (size_t)-1) \
212 { \
213 state = state_bak; \
214 _x++; \
215 } \
216 else if (mblength == 0) \
217 _x++; \
218 else \
219 { \
220 _p = _x; /* _p == start of prev mbchar */ \
221 _x += mblength; \
222 } \
223 } \
224 (_str) = _p; \
225 } \
226 else \
227 (_str)--; \
228 } \
229 while (0)
230#else
231# define BACKUP_CHAR_P(_base, _strsize, _str) (_str)--
232#endif /* !HANDLE_MULTIBYTE */
233
234/* Copy a single character from the string _SRC to the string _DST.
235 _SRCEND is a pointer to the end of _SRC. */
236#if defined (HANDLE_MULTIBYTE)
237# define COPY_CHAR_P(_dst, _src, _srcend) \
238 do \
239 { \
240 if (MB_CUR_MAX > 1) \
241 { \
242 mbstate_t state_bak; \
243 size_t mblength; \
244 int _k; \
245\
246 state_bak = state; \
247 mblength = mbrlen ((_src), (_srcend) - (_src), &state); \
248 if (mblength == (size_t)-2 || mblength == (size_t)-1) \
249 { \
250 state = state_bak; \
251 mblength = 1; \
252 } \
253 else \
254 mblength = (mblength < 1) ? 1 : mblength; \
255\
256 for (_k = 0; _k < mblength; _k++) \
257 *(_dst)++ = *(_src)++; \
258 } \
259 else \
260 *(_dst)++ = *(_src)++; \
261 } \
262 while (0)
263#else
264# define COPY_CHAR_P(_dst, _src, _srcend) *(_dst)++ = *(_src)++
265#endif /* !HANDLE_MULTIBYTE */
266
267/* Copy a single character from the string _SRC at index _SI to the string
268 _DST at index _DI. _SRCEND is a pointer to the end of _SRC. */
269#if defined (HANDLE_MULTIBYTE)
270# define COPY_CHAR_I(_dst, _di, _src, _srcend, _si) \
271 do \
272 { \
273 if (MB_CUR_MAX > 1) \
274 { \
275 mbstate_t state_bak; \
276 size_t mblength; \
277 int _k; \
278\
279 state_bak = state; \
280 mblength = mbrlen ((_src) + (_si), (_srcend) - ((_src)+(_si)), &state); \
281 if (mblength == (size_t)-2 || mblength == (size_t)-1) \
282 { \
283 state = state_bak; \
284 mblength = 1; \
285 } \
286 else \
287 mblength = (mblength < 1) ? 1 : mblength; \
288\
289 for (_k = 0; _k < mblength; _k++) \
290 _dst[_di++] = _src[_si++]; \
291 } \
292 else \
293 _dst[_di++] = _src[_si++]; \
294 } \
295 while (0)
296#else
297# define COPY_CHAR_I(_dst, _di, _src, _srcend, _si) _dst[_di++] = _src[_si++]
298#endif /* !HANDLE_MULTIBYTE */
299
300/****************************************************************
301 * *
302 * The following are only guaranteed to work in subst.c *
303 * *
304 ****************************************************************/
305
306#if defined (HANDLE_MULTIBYTE)
307# define SCOPY_CHAR_I(_dst, _escchar, _sc, _src, _si, _slen) \
308 do \
309 { \
310 if (MB_CUR_MAX > 1) \
311 { \
312 mbstate_t state_bak; \
313 size_t mblength; \
314 int _i; \
315\
316 state_bak = state; \
317 mblength = mbrlen ((_src) + (_si), (_slen) - (_si), &state); \
318 if (mblength == (size_t)-2 || mblength == (size_t)-1) \
319 { \
320 state = state_bak; \
321 mblength = 1; \
322 } \
323 else \
324 mblength = (mblength < 1) ? 1 : mblength; \
325\
326 temp = xmalloc (mblength + 2); \
327 temp[0] = _escchar; \
328 for (_i = 0; _i < mblength; _i++) \
329 temp[_i + 1] = _src[_si++]; \
330 temp[mblength + 1] = '\0'; \
331\
332 goto add_string; \
333 } \
334 else \
335 { \
336 _dst[0] = _escchar; \
337 _dst[1] = _sc; \
338 } \
339 } \
340 while (0)
341#else
342# define SCOPY_CHAR_I(_dst, _escchar, _sc, _src, _si, _slen) \
343 _dst[0] = _escchar; \
344 _dst[1] = _sc
345#endif /* !HANDLE_MULTIBYTE */
346
347#if defined (HANDLE_MULTIBYTE)
348# define SCOPY_CHAR_M(_dst, _src, _srcend, _si) \
349 do \
350 { \
351 if (MB_CUR_MAX > 1) \
352 { \
353 mbstate_t state_bak; \
354 size_t mblength; \
355\
356 state_bak = state; \
357 mblength = mbrlen ((_src) + (_si), (_srcend) - ((_src) + (_si)), &state); \
358 if (mblength == (size_t)-2 || mblength == (size_t)-1) \
359 { \
360 state = state_bak; \
361 mblength = 1; \
362 } \
363 else \
364 mblength = (mblength < 1) ? 1 : mblength; \
365\
366 FASTCOPY(((_src) + (_si)), (_dst), mblength); \
367\
368 (_dst) += mblength; \
369 (_si) += mblength; \
370 } \
371 else \
372 { \
373 *(_dst)++ = _src[(_si)]; \
374 (_si)++; \
375 } \
376 } \
377 while (0)
378#else
379# define SCOPY_CHAR_M(_dst, _src, _srcend, _si) \
380 *(_dst)++ = _src[(_si)]; \
381 (_si)++
382#endif /* !HANDLE_MULTIBYTE */
383
384#if HANDLE_MULTIBYTE
385# define SADD_MBCHAR(_dst, _src, _si, _srcsize) \
386 do \
387 { \
388 if (MB_CUR_MAX > 1) \
389 { \
390 int i; \
391 mbstate_t state_bak; \
392 size_t mblength; \
393\
394 state_bak = state; \
395 mblength = mbrlen ((_src) + (_si), (_srcsize) - (_si), &state); \
396 if (mblength == (size_t)-1 || mblength == (size_t)-2) \
397 { \
398 state = state_bak; \
399 mblength = 1; \
400 } \
401 if (mblength < 1) \
402 mblength = 1; \
403\
404 _dst = (char *)xmalloc (mblength + 1); \
405 for (i = 0; i < mblength; i++) \
406 (_dst)[i] = (_src)[(_si)++]; \
407 (_dst)[mblength] = '\0'; \
408\
409 goto add_string; \
410 } \
411 } \
412 while (0)
413
414#else
415# define SADD_MBCHAR(_dst, _src, _si, _srcsize)
416#endif
417
418/* Watch out when using this -- it's just straight textual subsitution */
419#if defined (HANDLE_MULTIBYTE)
420# define SADD_MBQCHAR_BODY(_dst, _src, _si, _srcsize) \
421\
422 int i; \
423 mbstate_t state_bak; \
424 size_t mblength; \
425\
426 state_bak = state; \
427 mblength = mbrlen ((_src) + (_si), (_srcsize) - (_si), &state); \
428 if (mblength == (size_t)-1 || mblength == (size_t)-2) \
429 { \
430 state = state_bak; \
431 mblength = 1; \
432 } \
433 if (mblength < 1) \
434 mblength = 1; \
435\
436 (_dst) = (char *)xmalloc (mblength + 2); \
437 (_dst)[0] = CTLESC; \
438 for (i = 0; i < mblength; i++) \
439 (_dst)[i+1] = (_src)[(_si)++]; \
440 (_dst)[mblength+1] = '\0'; \
441\
442 goto add_string
443
444#endif /* HANDLE_MULTIBYTE */
445#endif /* _SH_MBUTIL_H_ */
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