40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/* Copyright (C) 1996, 1997, 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "wcwidth.h"
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/* Determine number of column positions required for first N wide
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characters (or fewer if S ends before this) in S. */
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int
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wcswidth (const wchar_t *s, size_t n)
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{
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int result = 0;
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while (n-- > 0 && *s != L'\0')
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{
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int now = internal_wcwidth (*s);
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if (now == -1)
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return -1;
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result += now;
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++s;
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}
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return result;
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}
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