58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/* Determine the number of screen columns needed for a character.
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Copyright (C) 2006, 2007 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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#ifndef _gl_WCWIDTH_H
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#define _gl_WCWIDTH_H
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#if HAVE_WCHAR_T
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/* Get wcwidth if available, along with wchar_t. */
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# include <wchar.h>
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/* Get iswprint. */
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# include <wctype.h>
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# ifndef HAVE_DECL_WCWIDTH
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"this configure-time declaration test was not run"
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# endif
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# ifndef wcwidth
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# if !HAVE_WCWIDTH
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/* wcwidth doesn't exist, so assume all printable characters have
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width 1. */
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static inline int
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wcwidth (wchar_t wc)
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{
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return wc == 0 ? 0 : iswprint (wc) ? 1 : -1;
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}
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# elif !HAVE_DECL_WCWIDTH
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/* wcwidth exists but is not declared. */
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extern
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# ifdef __cplusplus
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"C"
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# endif
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int wcwidth (int /* actually wchar_t */);
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# endif
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# endif
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#endif /* HAVE_WCHAR_T */
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#endif /* _gl_WCWIDTH_H */
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