1/* A substitute for ISO C99 <wchar.h>, for platforms that have issues.
2
3   Copyright (C) 2007 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 3, 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#ifndef _GL_WCHAR_H
30
31/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
32   <wchar.h>.
33   BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
34   included before <wchar.h>.  */
35#include <stddef.h>
36#include <stdio.h>
37#include <time.h>
38
39/* Include the original <wchar.h> if it exists.
40   Some builds of uClibc lack it.  */
41/* The include_next requires a split double-inclusion guard.  */
42#if @HAVE_WCHAR_H@
43# @INCLUDE_NEXT@ @NEXT_WCHAR_H@
44#endif
45
46#ifndef _GL_WCHAR_H
47#define _GL_WCHAR_H
48
49/* The definition of GL_LINK_WARNING is copied here.  */
50
51#ifdef __cplusplus
52extern "C" {
53#endif
54
55
56/* Return the number of screen columns needed for WC.  */
57#if @GNULIB_WCWIDTH@
58# if @REPLACE_WCWIDTH@
59#  undef wcwidth
60#  define wcwidth rpl_wcwidth
61extern int wcwidth (wchar_t);
62# else
63#  if !defined wcwidth && !@HAVE_DECL_WCWIDTH@
64/* wcwidth exists but is not declared.  */
65extern int wcwidth (int /* actually wchar_t */);
66#  endif
67# endif
68#elif defined GNULIB_POSIXCHECK
69# undef wcwidth
70# define wcwidth(w) \
71    (GL_LINK_WARNING ("wcwidth is unportable - " \
72                      "use gnulib module wcwidth for portability"), \
73     wcwidth (w))
74#endif
75
76
77#ifdef __cplusplus
78}
79#endif
80
81#endif /* _GL_WCHAR_H */
82#endif /* _GL_WCHAR_H */
83