1 /* A substitute for ISO C99 <wchar.h>, for platforms that have issues.
3 Copyright (C) 2007-2009 Free Software Foundation, Inc.
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 3, or (at your option)
8 any later version.
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.
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. */
19 /* Written by Eric Blake. */
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 */
29 #if __GNUC__ >= 3
30 @PRAGMA_SYSTEM_HEADER@
31 #endif
33 #if defined __need_mbstate_t || (defined __hpux && ((defined _INTTYPES_INCLUDED && !defined strtoimax) || defined _GL_JUST_INCLUDE_SYSTEM_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>. */
43 #@INCLUDE_NEXT@ @NEXT_WCHAR_H@
45 #else
46 /* Normal invocation convention. */
48 #ifndef _GL_WCHAR_H
50 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
51 <wchar.h>.
52 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
53 included before <wchar.h>. */
54 #include <stddef.h>
55 #include <stdio.h>
56 #include <time.h>
58 /* Include the original <wchar.h> if it exists.
59 Some builds of uClibc lack it. */
60 /* The include_next requires a split double-inclusion guard. */
61 #if @HAVE_WCHAR_H@
62 # @INCLUDE_NEXT@ @NEXT_WCHAR_H@
63 #endif
65 #ifndef _GL_WCHAR_H
66 #define _GL_WCHAR_H
68 /* The definition of GL_LINK_WARNING is copied here. */
70 #ifdef __cplusplus
71 extern "C" {
72 #endif
75 /* Define wint_t. (Also done in wctype.in.h.) */
76 #if !@HAVE_WINT_T@ && !defined wint_t
77 # define wint_t int
78 # ifndef WEOF
79 # define WEOF -1
80 # endif
81 #endif
84 /* Override mbstate_t if it is too small.
85 On IRIX 6.5, sizeof (mbstate_t) == 1, which is not sufficient for
86 implementing mbrtowc for encodings like UTF-8. */
87 #if !(@HAVE_MBSINIT@ && @HAVE_MBRTOWC@) || @REPLACE_MBSTATE_T@
88 typedef int rpl_mbstate_t;
89 # undef mbstate_t
90 # define mbstate_t rpl_mbstate_t
91 # define GNULIB_defined_mbstate_t 1
92 #endif
95 /* Convert a single-byte character to a wide character. */
96 #if @GNULIB_BTOWC@
97 # if @REPLACE_BTOWC@
98 # undef btowc
99 # define btowc rpl_btowc
100 # endif
101 # if !@HAVE_BTOWC@ || @REPLACE_BTOWC@
102 extern wint_t btowc (int c);
103 # endif
104 #elif defined GNULIB_POSIXCHECK
105 # undef btowc
106 # define btowc(c) \
107 (GL_LINK_WARNING ("btowc is unportable - " \
108 "use gnulib module btowc for portability"), \
109 btowc (c))
110 #endif
113 /* Convert a wide character to a single-byte character. */
114 #if @GNULIB_WCTOB@
115 # if @REPLACE_WCTOB@
116 # undef wctob
117 # define wctob rpl_wctob
118 # endif
119 # if (!defined wctob && !@HAVE_DECL_WCTOB@) || @REPLACE_WCTOB@
120 /* wctob is provided by gnulib, or wctob exists but is not declared. */
121 extern int wctob (wint_t wc);
122 # endif
123 #elif defined GNULIB_POSIXCHECK
124 # undef wctob
125 # define wctob(w) \
126 (GL_LINK_WARNING ("wctob is unportable - " \
127 "use gnulib module wctob for portability"), \
128 wctob (w))
129 #endif
132 /* Test whether *PS is in the initial state. */
133 #if @GNULIB_MBSINIT@
134 # if @REPLACE_MBSINIT@
135 # undef mbsinit
136 # define mbsinit rpl_mbsinit
137 # endif
138 # if !@HAVE_MBSINIT@ || @REPLACE_MBSINIT@
139 extern int mbsinit (const mbstate_t *ps);
140 # endif
141 #elif defined GNULIB_POSIXCHECK
142 # undef mbsinit
143 # define mbsinit(p) \
144 (GL_LINK_WARNING ("mbsinit is unportable - " \
145 "use gnulib module mbsinit for portability"), \
146 mbsinit (p))
147 #endif
150 /* Convert a multibyte character to a wide character. */
151 #if @GNULIB_MBRTOWC@
152 # if @REPLACE_MBRTOWC@
153 # undef mbrtowc
154 # define mbrtowc rpl_mbrtowc
155 # endif
156 # if !@HAVE_MBRTOWC@ || @REPLACE_MBRTOWC@
157 extern size_t mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps);
158 # endif
159 #elif defined GNULIB_POSIXCHECK
160 # undef mbrtowc
161 # define mbrtowc(w,s,n,p) \
162 (GL_LINK_WARNING ("mbrtowc is unportable - " \
163 "use gnulib module mbrtowc for portability"), \
164 mbrtowc (w, s, n, p))
165 #endif
168 /* Recognize a multibyte character. */
169 #if @GNULIB_MBRLEN@
170 # if @REPLACE_MBRLEN@
171 # undef mbrlen
172 # define mbrlen rpl_mbrlen
173 # endif
174 # if !@HAVE_MBRLEN@ || @REPLACE_MBRLEN@
175 extern size_t mbrlen (const char *s, size_t n, mbstate_t *ps);
176 # endif
177 #elif defined GNULIB_POSIXCHECK
178 # undef mbrlen
179 # define mbrlen(s,n,p) \
180 (GL_LINK_WARNING ("mbrlen is unportable - " \
181 "use gnulib module mbrlen for portability"), \
182 mbrlen (s, n, p))
183 #endif
186 /* Convert a string to a wide string. */
187 #if @GNULIB_MBSRTOWCS@
188 # if @REPLACE_MBSRTOWCS@
189 # undef mbsrtowcs
190 # define mbsrtowcs rpl_mbsrtowcs
191 # endif
192 # if !@HAVE_MBSRTOWCS@ || @REPLACE_MBSRTOWCS@
193 extern size_t mbsrtowcs (wchar_t *dest, const char **srcp, size_t len, mbstate_t *ps);
194 # endif
195 #elif defined GNULIB_POSIXCHECK
196 # undef mbsrtowcs
197 # define mbsrtowcs(d,s,l,p) \
198 (GL_LINK_WARNING ("mbsrtowcs is unportable - " \
199 "use gnulib module mbsrtowcs for portability"), \
200 mbsrtowcs (d, s, l, p))
201 #endif
204 /* Convert a string to a wide string. */
205 #if @GNULIB_MBSNRTOWCS@
206 # if @REPLACE_MBSNRTOWCS@
207 # undef mbsnrtowcs
208 # define mbsnrtowcs rpl_mbsnrtowcs
209 # endif
210 # if !@HAVE_MBSNRTOWCS@ || @REPLACE_MBSNRTOWCS@
211 extern size_t mbsnrtowcs (wchar_t *dest, const char **srcp, size_t srclen, size_t len, mbstate_t *ps);
212 # endif
213 #elif defined GNULIB_POSIXCHECK
214 # undef mbsnrtowcs
215 # define mbsnrtowcs(d,s,n,l,p) \
216 (GL_LINK_WARNING ("mbsnrtowcs is unportable - " \
217 "use gnulib module mbsnrtowcs for portability"), \
218 mbsnrtowcs (d, s, n, l, p))
219 #endif
222 /* Convert a wide character to a multibyte character. */
223 #if @GNULIB_WCRTOMB@
224 # if @REPLACE_WCRTOMB@
225 # undef wcrtomb
226 # define wcrtomb rpl_wcrtomb
227 # endif
228 # if !@HAVE_WCRTOMB@ || @REPLACE_WCRTOMB@
229 extern size_t wcrtomb (char *s, wchar_t wc, mbstate_t *ps);
230 # endif
231 #elif defined GNULIB_POSIXCHECK
232 # undef wcrtomb
233 # define wcrtomb(s,w,p) \
234 (GL_LINK_WARNING ("wcrtomb is unportable - " \
235 "use gnulib module wcrtomb for portability"), \
236 wcrtomb (s, w, p))
237 #endif
240 /* Convert a wide string to a string. */
241 #if @GNULIB_WCSRTOMBS@
242 # if @REPLACE_WCSRTOMBS@
243 # undef wcsrtombs
244 # define wcsrtombs rpl_wcsrtombs
245 # endif
246 # if !@HAVE_WCSRTOMBS@ || @REPLACE_WCSRTOMBS@
247 extern size_t wcsrtombs (char *dest, const wchar_t **srcp, size_t len, mbstate_t *ps);
248 # endif
249 #elif defined GNULIB_POSIXCHECK
250 # undef wcsrtombs
251 # define wcsrtombs(d,s,l,p) \
252 (GL_LINK_WARNING ("wcsrtombs is unportable - " \
253 "use gnulib module wcsrtombs for portability"), \
254 wcsrtombs (d, s, l, p))
255 #endif
258 /* Convert a wide string to a string. */
259 #if @GNULIB_WCSNRTOMBS@
260 # if !@HAVE_WCSNRTOMBS@
261 extern size_t wcsnrtombs (char *dest, const wchar_t **srcp, size_t srclen, size_t len, mbstate_t *ps);
262 # endif
263 #elif defined GNULIB_POSIXCHECK
264 # undef wcsnrtombs
265 # define wcsnrtombs(d,s,n,l,p) \
266 (GL_LINK_WARNING ("wcsnrtombs is unportable - " \
267 "use gnulib module wcsnrtombs for portability"), \
268 wcsnrtombs (d, s, n, l, p))
269 #endif
272 /* Return the number of screen columns needed for WC. */
273 #if @GNULIB_WCWIDTH@
274 # if @REPLACE_WCWIDTH@
275 # undef wcwidth
276 # define wcwidth rpl_wcwidth
277 extern int wcwidth (wchar_t);
278 # else
279 # if !defined wcwidth && !@HAVE_DECL_WCWIDTH@
280 /* wcwidth exists but is not declared. */
281 extern int wcwidth (int /* actually wchar_t */);
282 # endif
283 # endif
284 #elif defined GNULIB_POSIXCHECK
285 # undef wcwidth
286 # define wcwidth(w) \
287 (GL_LINK_WARNING ("wcwidth is unportable - " \
288 "use gnulib module wcwidth for portability"), \
289 wcwidth (w))
290 #endif
293 #ifdef __cplusplus
294 }
295 #endif
297 #endif /* _GL_WCHAR_H */
298 #endif /* _GL_WCHAR_H */
299 #endif