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comparison lib/wchar.in.h @ 265:68fbca173508 2.6

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author lost
date Tue, 22 Dec 2009 05:31:23 +0000
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264:61d1db1dfe2a 265:68fbca173508
1 /* A substitute for ISO C99 <wchar.h>, for platforms that have issues.
2
3 Copyright (C) 2007-2009 Free Software Foundation, Inc.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
8 any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18
19 /* Written by Eric Blake. */
20
21 /*
22 * ISO C 99 <wchar.h> for platforms that have issues.
23 * <http://www.opengroup.org/susv3xbd/wchar.h.html>
24 *
25 * For now, this just ensures proper prerequisite inclusion order and
26 * the declaration of wcwidth().
27 */
28
29 #if __GNUC__ >= 3
30 @PRAGMA_SYSTEM_HEADER@
31 #endif
32
33 #if defined __need_mbstate_t || (defined __hpux && ((defined _INTTYPES_INCLUDED && !defined strtoimax) || defined _GL_JUST_INCLUDE_SYSTEM_WCHAR_H)) || defined _GL_ALREADY_INCLUDING_WCHAR_H
34 /* Special invocation convention:
35 - Inside uClibc header files.
36 - On HP-UX 11.00 we have a sequence of nested includes
37 <wchar.h> -> <stdlib.h> -> <stdint.h>, and the latter includes <wchar.h>,
38 once indirectly <stdint.h> -> <sys/types.h> -> <inttypes.h> -> <wchar.h>
39 and once directly. In both situations 'wint_t' is not yet defined,
40 therefore we cannot provide the function overrides; instead include only
41 the system's <wchar.h>.
42 - On IRIX 6.5, similarly, we have an include <wchar.h> -> <wctype.h>, and
43 the latter includes <wchar.h>. But here, we have no way to detect whether
44 <wctype.h> is completely included or is still being included. */
45
46 #@INCLUDE_NEXT@ @NEXT_WCHAR_H@
47
48 #else
49 /* Normal invocation convention. */
50
51 #ifndef _GL_WCHAR_H
52
53 #define _GL_ALREADY_INCLUDING_WCHAR_H
54
55 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
56 <wchar.h>.
57 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
58 included before <wchar.h>. */
59 #include <stddef.h>
60 #include <stdio.h>
61 #include <time.h>
62
63 /* Include the original <wchar.h> if it exists.
64 Some builds of uClibc lack it. */
65 /* The include_next requires a split double-inclusion guard. */
66 #if @HAVE_WCHAR_H@
67 # @INCLUDE_NEXT@ @NEXT_WCHAR_H@
68 #endif
69
70 #undef _GL_ALREADY_INCLUDING_WCHAR_H
71
72 #ifndef _GL_WCHAR_H
73 #define _GL_WCHAR_H
74
75 /* The definition of GL_LINK_WARNING is copied here. */
76
77 #ifdef __cplusplus
78 extern "C" {
79 #endif
80
81
82 /* Define wint_t. (Also done in wctype.in.h.) */
83 #if !@HAVE_WINT_T@ && !defined wint_t
84 # define wint_t int
85 # ifndef WEOF
86 # define WEOF -1
87 # endif
88 #endif
89
90
91 /* Override mbstate_t if it is too small.
92 On IRIX 6.5, sizeof (mbstate_t) == 1, which is not sufficient for
93 implementing mbrtowc for encodings like UTF-8. */
94 #if !(@HAVE_MBSINIT@ && @HAVE_MBRTOWC@) || @REPLACE_MBSTATE_T@
95 typedef int rpl_mbstate_t;
96 # undef mbstate_t
97 # define mbstate_t rpl_mbstate_t
98 # define GNULIB_defined_mbstate_t 1
99 #endif
100
101
102 /* Convert a single-byte character to a wide character. */
103 #if @GNULIB_BTOWC@
104 # if @REPLACE_BTOWC@
105 # undef btowc
106 # define btowc rpl_btowc
107 # endif
108 # if !@HAVE_BTOWC@ || @REPLACE_BTOWC@
109 extern wint_t btowc (int c);
110 # endif
111 #elif defined GNULIB_POSIXCHECK
112 # undef btowc
113 # define btowc(c) \
114 (GL_LINK_WARNING ("btowc is unportable - " \
115 "use gnulib module btowc for portability"), \
116 btowc (c))
117 #endif
118
119
120 /* Convert a wide character to a single-byte character. */
121 #if @GNULIB_WCTOB@
122 # if @REPLACE_WCTOB@
123 # undef wctob
124 # define wctob rpl_wctob
125 # endif
126 # if (!defined wctob && !@HAVE_DECL_WCTOB@) || @REPLACE_WCTOB@
127 /* wctob is provided by gnulib, or wctob exists but is not declared. */
128 extern int wctob (wint_t wc);
129 # endif
130 #elif defined GNULIB_POSIXCHECK
131 # undef wctob
132 # define wctob(w) \
133 (GL_LINK_WARNING ("wctob is unportable - " \
134 "use gnulib module wctob for portability"), \
135 wctob (w))
136 #endif
137
138
139 /* Test whether *PS is in the initial state. */
140 #if @GNULIB_MBSINIT@
141 # if @REPLACE_MBSINIT@
142 # undef mbsinit
143 # define mbsinit rpl_mbsinit
144 # endif
145 # if !@HAVE_MBSINIT@ || @REPLACE_MBSINIT@
146 extern int mbsinit (const mbstate_t *ps);
147 # endif
148 #elif defined GNULIB_POSIXCHECK
149 # undef mbsinit
150 # define mbsinit(p) \
151 (GL_LINK_WARNING ("mbsinit is unportable - " \
152 "use gnulib module mbsinit for portability"), \
153 mbsinit (p))
154 #endif
155
156
157 /* Convert a multibyte character to a wide character. */
158 #if @GNULIB_MBRTOWC@
159 # if @REPLACE_MBRTOWC@
160 # undef mbrtowc
161 # define mbrtowc rpl_mbrtowc
162 # endif
163 # if !@HAVE_MBRTOWC@ || @REPLACE_MBRTOWC@
164 extern size_t mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps);
165 # endif
166 #elif defined GNULIB_POSIXCHECK
167 # undef mbrtowc
168 # define mbrtowc(w,s,n,p) \
169 (GL_LINK_WARNING ("mbrtowc is unportable - " \
170 "use gnulib module mbrtowc for portability"), \
171 mbrtowc (w, s, n, p))
172 #endif
173
174
175 /* Recognize a multibyte character. */
176 #if @GNULIB_MBRLEN@
177 # if @REPLACE_MBRLEN@
178 # undef mbrlen
179 # define mbrlen rpl_mbrlen
180 # endif
181 # if !@HAVE_MBRLEN@ || @REPLACE_MBRLEN@
182 extern size_t mbrlen (const char *s, size_t n, mbstate_t *ps);
183 # endif
184 #elif defined GNULIB_POSIXCHECK
185 # undef mbrlen
186 # define mbrlen(s,n,p) \
187 (GL_LINK_WARNING ("mbrlen is unportable - " \
188 "use gnulib module mbrlen for portability"), \
189 mbrlen (s, n, p))
190 #endif
191
192
193 /* Convert a string to a wide string. */
194 #if @GNULIB_MBSRTOWCS@
195 # if @REPLACE_MBSRTOWCS@
196 # undef mbsrtowcs
197 # define mbsrtowcs rpl_mbsrtowcs
198 # endif
199 # if !@HAVE_MBSRTOWCS@ || @REPLACE_MBSRTOWCS@
200 extern size_t mbsrtowcs (wchar_t *dest, const char **srcp, size_t len, mbstate_t *ps);
201 # endif
202 #elif defined GNULIB_POSIXCHECK
203 # undef mbsrtowcs
204 # define mbsrtowcs(d,s,l,p) \
205 (GL_LINK_WARNING ("mbsrtowcs is unportable - " \
206 "use gnulib module mbsrtowcs for portability"), \
207 mbsrtowcs (d, s, l, p))
208 #endif
209
210
211 /* Convert a string to a wide string. */
212 #if @GNULIB_MBSNRTOWCS@
213 # if @REPLACE_MBSNRTOWCS@
214 # undef mbsnrtowcs
215 # define mbsnrtowcs rpl_mbsnrtowcs
216 # endif
217 # if !@HAVE_MBSNRTOWCS@ || @REPLACE_MBSNRTOWCS@
218 extern size_t mbsnrtowcs (wchar_t *dest, const char **srcp, size_t srclen, size_t len, mbstate_t *ps);
219 # endif
220 #elif defined GNULIB_POSIXCHECK
221 # undef mbsnrtowcs
222 # define mbsnrtowcs(d,s,n,l,p) \
223 (GL_LINK_WARNING ("mbsnrtowcs is unportable - " \
224 "use gnulib module mbsnrtowcs for portability"), \
225 mbsnrtowcs (d, s, n, l, p))
226 #endif
227
228
229 /* Convert a wide character to a multibyte character. */
230 #if @GNULIB_WCRTOMB@
231 # if @REPLACE_WCRTOMB@
232 # undef wcrtomb
233 # define wcrtomb rpl_wcrtomb
234 # endif
235 # if !@HAVE_WCRTOMB@ || @REPLACE_WCRTOMB@
236 extern size_t wcrtomb (char *s, wchar_t wc, mbstate_t *ps);
237 # endif
238 #elif defined GNULIB_POSIXCHECK
239 # undef wcrtomb
240 # define wcrtomb(s,w,p) \
241 (GL_LINK_WARNING ("wcrtomb is unportable - " \
242 "use gnulib module wcrtomb for portability"), \
243 wcrtomb (s, w, p))
244 #endif
245
246
247 /* Convert a wide string to a string. */
248 #if @GNULIB_WCSRTOMBS@
249 # if @REPLACE_WCSRTOMBS@
250 # undef wcsrtombs
251 # define wcsrtombs rpl_wcsrtombs
252 # endif
253 # if !@HAVE_WCSRTOMBS@ || @REPLACE_WCSRTOMBS@
254 extern size_t wcsrtombs (char *dest, const wchar_t **srcp, size_t len, mbstate_t *ps);
255 # endif
256 #elif defined GNULIB_POSIXCHECK
257 # undef wcsrtombs
258 # define wcsrtombs(d,s,l,p) \
259 (GL_LINK_WARNING ("wcsrtombs is unportable - " \
260 "use gnulib module wcsrtombs for portability"), \
261 wcsrtombs (d, s, l, p))
262 #endif
263
264
265 /* Convert a wide string to a string. */
266 #if @GNULIB_WCSNRTOMBS@
267 # if !@HAVE_WCSNRTOMBS@
268 extern size_t wcsnrtombs (char *dest, const wchar_t **srcp, size_t srclen, size_t len, mbstate_t *ps);
269 # endif
270 #elif defined GNULIB_POSIXCHECK
271 # undef wcsnrtombs
272 # define wcsnrtombs(d,s,n,l,p) \
273 (GL_LINK_WARNING ("wcsnrtombs is unportable - " \
274 "use gnulib module wcsnrtombs for portability"), \
275 wcsnrtombs (d, s, n, l, p))
276 #endif
277
278
279 /* Return the number of screen columns needed for WC. */
280 #if @GNULIB_WCWIDTH@
281 # if @REPLACE_WCWIDTH@
282 # undef wcwidth
283 # define wcwidth rpl_wcwidth
284 extern int wcwidth (wchar_t);
285 # else
286 # if !defined wcwidth && !@HAVE_DECL_WCWIDTH@
287 /* wcwidth exists but is not declared. */
288 extern int wcwidth (int /* actually wchar_t */);
289 # endif
290 # endif
291 #elif defined GNULIB_POSIXCHECK
292 # undef wcwidth
293 # define wcwidth(w) \
294 (GL_LINK_WARNING ("wcwidth is unportable - " \
295 "use gnulib module wcwidth for portability"), \
296 wcwidth (w))
297 #endif
298
299
300 #ifdef __cplusplus
301 }
302 #endif
303
304 #endif /* _GL_WCHAR_H */
305 #endif /* _GL_WCHAR_H */
306 #endif