decomposer.cc: avoid use of half-open cones
[barvinok.git] / lib / wcwidth.h
blob389d810a88979505734942013f4afb990e9d1af0
1 /* Determine the number of screen columns needed for a character.
2 Copyright (C) 2006 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
7 any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18 #ifndef _gl_WCWIDTH_H
19 #define _gl_WCWIDTH_H
21 #if HAVE_WCHAR_T
23 /* Get wcwidth if available, along with wchar_t. */
24 # if HAVE_WCHAR_H
25 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
26 <wchar.h>.
27 BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
28 <wchar.h>. */
29 # include <stdio.h>
30 # include <time.h>
31 # include <wchar.h>
32 # endif
34 /* Get iswprint. */
35 # include <wctype.h>
37 # ifndef HAVE_DECL_WCWIDTH
38 "this configure-time declaration test was not run"
39 # endif
40 # ifndef wcwidth
41 # if !HAVE_WCWIDTH
43 /* wcwidth doesn't exist, so assume all printable characters have
44 width 1. */
45 static inline int
46 wcwidth (wchar_t wc)
48 return wc == 0 ? 0 : iswprint (wc) ? 1 : -1;
51 # elif !HAVE_DECL_WCWIDTH
53 /* wcwidth exists but is not declared. */
54 extern
55 # ifdef __cplusplus
56 "C"
57 # endif
58 int wcwidth (int /* actually wchar_t */);
60 # endif
61 # endif
63 #endif /* HAVE_WCHAR_H */
65 #endif /* _gl_WCWIDTH_H */