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39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/* Copyright (C) 1996-2016 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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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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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