[bpt/guile.git] / lib / wchar.in.h

/* A substitute for ISO C99 <wchar.h>, for platforms that have issues.

   Copyright (C) 2007-2009 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

/* Written by Eric Blake.  */

/*
 * ISO C 99 <wchar.h> for platforms that have issues.
 * <http://www.opengroup.org/susv3xbd/wchar.h.html>
 *
 * For now, this just ensures proper prerequisite inclusion order and
 * the declaration of wcwidth().
 */

#if __GNUC__ >= 3
@PRAGMA_SYSTEM_HEADER@
#endif

#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
/* Special invocation convention:
   - Inside uClibc header files.
   - On HP-UX 11.00 we have a sequence of nested includes
     <wchar.h> -> <stdlib.h> -> <stdint.h>, and the latter includes <wchar.h>,
     once indirectly <stdint.h> -> <sys/types.h> -> <inttypes.h> -> <wchar.h>
     and once directly.  In both situations 'wint_t' is not yet defined,
     therefore we cannot provide the function overrides; instead include only
     the system's <wchar.h>.
   - On IRIX 6.5, similarly, we have an include <wchar.h> -> <wctype.h>, and
     the latter includes <wchar.h>.  But here, we have no way to detect whether
     <wctype.h> is completely included or is still being included.  */

#@INCLUDE_NEXT@ @NEXT_WCHAR_H@

#else
/* Normal invocation convention.  */

#ifndef _GL_WCHAR_H

#define _GL_ALREADY_INCLUDING_WCHAR_H

/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
   <wchar.h>.
   BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
   included before <wchar.h>.  */
#include <stddef.h>
#include <stdio.h>
#include <time.h>

/* Include the original <wchar.h> if it exists.
   Some builds of uClibc lack it.  */
/* The include_next requires a split double-inclusion guard.  */
#if @HAVE_WCHAR_H@
# @INCLUDE_NEXT@ @NEXT_WCHAR_H@
#endif

#undef _GL_ALREADY_INCLUDING_WCHAR_H

#ifndef _GL_WCHAR_H
#define _GL_WCHAR_H

/* The definition of GL_LINK_WARNING is copied here.  */

#ifdef __cplusplus
extern "C" {
#endif


/* Define wint_t.  (Also done in wctype.in.h.)  */
#if !@HAVE_WINT_T@ && !defined wint_t
# define wint_t int
# ifndef WEOF
#  define WEOF -1
# endif
#endif


/* Override mbstate_t if it is too small.
   On IRIX 6.5, sizeof (mbstate_t) == 1, which is not sufficient for
   implementing mbrtowc for encodings like UTF-8.  */
#if !(@HAVE_MBSINIT@ && @HAVE_MBRTOWC@) || @REPLACE_MBSTATE_T@
typedef int rpl_mbstate_t;
# undef mbstate_t
# define mbstate_t rpl_mbstate_t
# define GNULIB_defined_mbstate_t 1
#endif


/* Convert a single-byte character to a wide character.  */
#if @GNULIB_BTOWC@
# if @REPLACE_BTOWC@
#  undef btowc
#  define btowc rpl_btowc
# endif
# if !@HAVE_BTOWC@ || @REPLACE_BTOWC@
extern wint_t btowc (int c);
# endif
#elif defined GNULIB_POSIXCHECK
# undef btowc
# define btowc(c) \
    (GL_LINK_WARNING ("btowc is unportable - " \
                      "use gnulib module btowc for portability"), \
     btowc (c))
#endif


/* Convert a wide character to a single-byte character.  */
#if @GNULIB_WCTOB@
# if @REPLACE_WCTOB@
#  undef wctob
#  define wctob rpl_wctob
# endif
# if (!defined wctob && !@HAVE_DECL_WCTOB@) || @REPLACE_WCTOB@
/* wctob is provided by gnulib, or wctob exists but is not declared.  */
extern int wctob (wint_t wc);
# endif
#elif defined GNULIB_POSIXCHECK
# undef wctob
# define wctob(w) \
    (GL_LINK_WARNING ("wctob is unportable - " \
                      "use gnulib module wctob for portability"), \
     wctob (w))
#endif


/* Test whether *PS is in the initial state.  */
#if @GNULIB_MBSINIT@
# if @REPLACE_MBSINIT@
#  undef mbsinit
#  define mbsinit rpl_mbsinit
# endif
# if !@HAVE_MBSINIT@ || @REPLACE_MBSINIT@
extern int mbsinit (const mbstate_t *ps);
# endif
#elif defined GNULIB_POSIXCHECK
# undef mbsinit
# define mbsinit(p) \
    (GL_LINK_WARNING ("mbsinit is unportable - " \
                      "use gnulib module mbsinit for portability"), \
     mbsinit (p))
#endif


/* Convert a multibyte character to a wide character.  */
#if @GNULIB_MBRTOWC@
# if @REPLACE_MBRTOWC@
#  undef mbrtowc
#  define mbrtowc rpl_mbrtowc
# endif
# if !@HAVE_MBRTOWC@ || @REPLACE_MBRTOWC@
extern size_t mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps);
# endif
#elif defined GNULIB_POSIXCHECK
# undef mbrtowc
# define mbrtowc(w,s,n,p) \
    (GL_LINK_WARNING ("mbrtowc is unportable - " \
                      "use gnulib module mbrtowc for portability"), \
     mbrtowc (w, s, n, p))
#endif


/* Recognize a multibyte character.  */
#if @GNULIB_MBRLEN@
# if @REPLACE_MBRLEN@
#  undef mbrlen
#  define mbrlen rpl_mbrlen
# endif
# if !@HAVE_MBRLEN@ || @REPLACE_MBRLEN@
extern size_t mbrlen (const char *s, size_t n, mbstate_t *ps);
# endif
#elif defined GNULIB_POSIXCHECK
# undef mbrlen
# define mbrlen(s,n,p) \
    (GL_LINK_WARNING ("mbrlen is unportable - " \
                      "use gnulib module mbrlen for portability"), \
     mbrlen (s, n, p))
#endif


/* Convert a string to a wide string.  */
#if @GNULIB_MBSRTOWCS@
# if @REPLACE_MBSRTOWCS@
#  undef mbsrtowcs
#  define mbsrtowcs rpl_mbsrtowcs
# endif
# if !@HAVE_MBSRTOWCS@ || @REPLACE_MBSRTOWCS@
extern size_t mbsrtowcs (wchar_t *dest, const char **srcp, size_t len, mbstate_t *ps);
# endif
#elif defined GNULIB_POSIXCHECK
# undef mbsrtowcs
# define mbsrtowcs(d,s,l,p) \
    (GL_LINK_WARNING ("mbsrtowcs is unportable - " \
                      "use gnulib module mbsrtowcs for portability"), \
     mbsrtowcs (d, s, l, p))
#endif


/* Convert a string to a wide string.  */
#if @GNULIB_MBSNRTOWCS@
# if @REPLACE_MBSNRTOWCS@
#  undef mbsnrtowcs
#  define mbsnrtowcs rpl_mbsnrtowcs
# endif
# if !@HAVE_MBSNRTOWCS@ || @REPLACE_MBSNRTOWCS@
extern size_t mbsnrtowcs (wchar_t *dest, const char **srcp, size_t srclen, size_t len, mbstate_t *ps);
# endif
#elif defined GNULIB_POSIXCHECK
# undef mbsnrtowcs
# define mbsnrtowcs(d,s,n,l,p) \
    (GL_LINK_WARNING ("mbsnrtowcs is unportable - " \
                      "use gnulib module mbsnrtowcs for portability"), \
     mbsnrtowcs (d, s, n, l, p))
#endif


/* Convert a wide character to a multibyte character.  */
#if @GNULIB_WCRTOMB@
# if @REPLACE_WCRTOMB@
#  undef wcrtomb
#  define wcrtomb rpl_wcrtomb
# endif
# if !@HAVE_WCRTOMB@ || @REPLACE_WCRTOMB@
extern size_t wcrtomb (char *s, wchar_t wc, mbstate_t *ps);
# endif
#elif defined GNULIB_POSIXCHECK
# undef wcrtomb
# define wcrtomb(s,w,p) \
    (GL_LINK_WARNING ("wcrtomb is unportable - " \
                      "use gnulib module wcrtomb for portability"), \
     wcrtomb (s, w, p))
#endif


/* Convert a wide string to a string.  */
#if @GNULIB_WCSRTOMBS@
# if @REPLACE_WCSRTOMBS@
#  undef wcsrtombs
#  define wcsrtombs rpl_wcsrtombs
# endif
# if !@HAVE_WCSRTOMBS@ || @REPLACE_WCSRTOMBS@
extern size_t wcsrtombs (char *dest, const wchar_t **srcp, size_t len, mbstate_t *ps);
# endif
#elif defined GNULIB_POSIXCHECK
# undef wcsrtombs
# define wcsrtombs(d,s,l,p) \
    (GL_LINK_WARNING ("wcsrtombs is unportable - " \
                      "use gnulib module wcsrtombs for portability"), \
     wcsrtombs (d, s, l, p))
#endif


/* Convert a wide string to a string.  */
#if @GNULIB_WCSNRTOMBS@
# if @REPLACE_WCSNRTOMBS@
#  undef wcsnrtombs
#  define wcsnrtombs rpl_wcsnrtombs
# endif
# if !@HAVE_WCSNRTOMBS@ || @REPLACE_WCSNRTOMBS@
extern size_t wcsnrtombs (char *dest, const wchar_t **srcp, size_t srclen, size_t len, mbstate_t *ps);
# endif
#elif defined GNULIB_POSIXCHECK
# undef wcsnrtombs
# define wcsnrtombs(d,s,n,l,p) \
    (GL_LINK_WARNING ("wcsnrtombs is unportable - " \
                      "use gnulib module wcsnrtombs for portability"), \
     wcsnrtombs (d, s, n, l, p))
#endif


/* Return the number of screen columns needed for WC.  */
#if @GNULIB_WCWIDTH@
# if @REPLACE_WCWIDTH@
#  undef wcwidth
#  define wcwidth rpl_wcwidth
extern int wcwidth (wchar_t);
# else
#  if !defined wcwidth && !@HAVE_DECL_WCWIDTH@
/* wcwidth exists but is not declared.  */
extern int wcwidth (int /* actually wchar_t */);
#  endif
# endif
#elif defined GNULIB_POSIXCHECK
# undef wcwidth
# define wcwidth(w) \
    (GL_LINK_WARNING ("wcwidth is unportable - " \
                      "use gnulib module wcwidth for portability"), \
     wcwidth (w))
#endif


#ifdef __cplusplus
}
#endif

#endif /* _GL_WCHAR_H */
#endif /* _GL_WCHAR_H */
#endif
Commit	Line	Data
e65fc94b LC	1	/* A substitute for ISO C99 <wchar.h>, for platforms that have issues.
e65fc94b LC	2
f240aacb	3	Copyright (C) 2007-2009 Free Software Foundation, Inc.
e65fc94b LC	4
	5	This program is free software; you can redistribute it and/or modify
	6	it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
	14
	15	You should have received a copy of the GNU Lesser 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
aa7a939c	29	#if __GNUC__ >= 3
e65fc94b	30	@PRAGMA_SYSTEM_HEADER@
aa7a939c	31	#endif
e65fc94b	32
f240aacb LC	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. */
e65fc94b LC	45
	46	#@INCLUDE_NEXT@ @NEXT_WCHAR_H@
	47
	48	#else
	49	/* Normal invocation convention. */
	50
	51	#ifndef _GL_WCHAR_H
	52
f240aacb LC	53	#define _GL_ALREADY_INCLUDING_WCHAR_H
f240aacb LC	54
e65fc94b LC	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
f240aacb LC	70	#undef _GL_ALREADY_INCLUDING_WCHAR_H
f240aacb LC	71
e65fc94b LC	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
aa7a939c LC	82	/* Define wint_t. (Also done in wctype.in.h.) */
	83	#if !@HAVE_WINT_T@ && !defined wint_t
	84	# define wint_t int
4a462e35 NJ	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@
f240aacb LC	267	# if @REPLACE_WCSNRTOMBS@
	268	# undef wcsnrtombs
	269	# define wcsnrtombs rpl_wcsnrtombs
	270	# endif
	271	# if !@HAVE_WCSNRTOMBS@ \|\| @REPLACE_WCSNRTOMBS@
4a462e35 NJ	272	extern size_t wcsnrtombs (char dest, const wchar_t srcp, size_t srclen, size_t len, mbstate_t ps);
	273	# endif
	274	#elif defined GNULIB_POSIXCHECK
	275	# undef wcsnrtombs
	276	# define wcsnrtombs(d,s,n,l,p) \
	277	(GL_LINK_WARNING ("wcsnrtombs is unportable - " \
	278	"use gnulib module wcsnrtombs for portability"), \
	279	wcsnrtombs (d, s, n, l, p))
aa7a939c LC	280	#endif
	281
	282
e65fc94b LC	283	/* Return the number of screen columns needed for WC. */
	284	#if @GNULIB_WCWIDTH@
	285	# if @REPLACE_WCWIDTH@
	286	# undef wcwidth
	287	# define wcwidth rpl_wcwidth
	288	extern int wcwidth (wchar_t);
	289	# else
	290	# if !defined wcwidth && !@HAVE_DECL_WCWIDTH@
	291	/* wcwidth exists but is not declared. */
	292	extern int wcwidth (int /* actually wchar_t */);
	293	# endif
	294	# endif
	295	#elif defined GNULIB_POSIXCHECK
	296	# undef wcwidth
	297	# define wcwidth(w) \
	298	(GL_LINK_WARNING ("wcwidth is unportable - " \
	299	"use gnulib module wcwidth for portability"), \
	300	wcwidth (w))
	301	#endif
	302
	303
	304	#ifdef __cplusplus
	305	}
	306	#endif
	307
	308	#endif /* _GL_WCHAR_H */
	309	#endif /* _GL_WCHAR_H */
	310	#endif