1 /* A substitute for ISO C99 <wchar.h>, for platforms that have issues.
3 Copyright (C) 2007-2008 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 2, or (at your option)
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. */
22 * ISO C 99 <wchar.h> for platforms that have issues.
23 * <http://www.opengroup.org/susv3xbd/wchar.h.html>
25 * For now, this just ensures proper prerequisite inclusion order and
26 * the declaration of wcwidth().
30 @PRAGMA_SYSTEM_HEADER@
33 #ifdef __need_mbstate_t
34 /* Special invocation convention inside uClibc header files. */
36 #@INCLUDE_NEXT@ @NEXT_WCHAR_H@
39 /* Normal invocation convention. */
43 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
45 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
46 included before <wchar.h>. */
51 /* Include the original <wchar.h> if it exists.
52 Some builds of uClibc lack it. */
53 /* The include_next requires a split double-inclusion guard. */
55 # @INCLUDE_NEXT@ @NEXT_WCHAR_H@
61 /* The definition of GL_LINK_WARNING is copied here. */
68 /* Define wint_t. (Also done in wctype.in.h.) */
69 #if !@HAVE_WINT_T@ && !defined wint_t
74 /* Override mbstate_t if it is too small.
75 On IRIX 6.5, sizeof (mbstate_t) == 1, which is not sufficient for
76 implementing mbrtowc for encodings like UTF-8. */
77 #if !(@HAVE_MBSINIT@ && @HAVE_MBRTOWC@)
78 typedef int rpl_mbstate_t;
80 # define mbstate_t rpl_mbstate_t
84 /* Convert a single-byte character to a wide character. */
87 extern wint_t btowc (int c);
89 #elif defined GNULIB_POSIXCHECK
92 (GL_LINK_WARNING ("btowc is unportable - " \
93 "use gnulib module btowc for portability"), \
98 /* Convert a wide character to a single-byte character. */
102 # define wctob rpl_wctob
104 # if (!defined wctob && !@HAVE_DECL_WCTOB@) || @REPLACE_WCTOB@
105 /* wctob is provided by gnulib, or wctob exists but is not declared. */
106 extern int wctob (wint_t wc);
108 #elif defined GNULIB_POSIXCHECK
111 (GL_LINK_WARNING ("wctob is unportable - " \
112 "use gnulib module wctob for portability"), \
117 /* Test whether *PS is in the initial state. */
120 extern int mbsinit (const mbstate_t *ps);
122 #elif defined GNULIB_POSIXCHECK
124 # define mbsinit(p) \
125 (GL_LINK_WARNING ("mbsinit is unportable - " \
126 "use gnulib module mbsinit for portability"), \
131 /* Convert a multibyte character to a wide character. */
134 extern size_t mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps);
136 #elif defined GNULIB_POSIXCHECK
138 # define mbrtowc(w,s,n,p) \
139 (GL_LINK_WARNING ("mbrtowc is unportable - " \
140 "use gnulib module mbrtowc for portability"), \
141 mbrtowc (w, s, n, p))
145 /* Recognize a multibyte character. */
148 extern size_t mbrlen (const char *s, size_t n, mbstate_t *ps);
150 #elif defined GNULIB_POSIXCHECK
152 # define mbrlen(s,n,p) \
153 (GL_LINK_WARNING ("mbrlen is unportable - " \
154 "use gnulib module mbrlen for portability"), \
159 /* Convert a string to a wide string. */
160 #if @GNULIB_MBSRTOWCS@
161 # if !@HAVE_MBSRTOWCS@
162 extern size_t mbsrtowcs (wchar_t *dest, const char **srcp, size_t len, mbstate_t *ps);
164 #elif defined GNULIB_POSIXCHECK
166 # define mbsrtowcs(d,s,l,p) \
167 (GL_LINK_WARNING ("mbsrtowcs is unportable - " \
168 "use gnulib module mbsrtowcs for portability"), \
169 mbsrtowcs (d, s, l, p))
173 /* Return the number of screen columns needed for WC. */
175 # if @REPLACE_WCWIDTH@
177 # define wcwidth rpl_wcwidth
178 extern int wcwidth (wchar_t);
180 # if !defined wcwidth && !@HAVE_DECL_WCWIDTH@
181 /* wcwidth exists but is not declared. */
182 extern int wcwidth (int /* actually wchar_t */);
185 #elif defined GNULIB_POSIXCHECK
187 # define wcwidth(w) \
188 (GL_LINK_WARNING ("wcwidth is unportable - " \
189 "use gnulib module wcwidth for portability"), \
198 #endif /* _GL_WCHAR_H */
199 #endif /* _GL_WCHAR_H */