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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 | |
52 | extern "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 | |
61 | extern int wcwidth (wchar_t); | |
62 | # else | |
63 | # if !defined wcwidth && !@HAVE_DECL_WCWIDTH@ | |
64 | /* wcwidth exists but is not declared. */ | |
65 | extern 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 */ |