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84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
/* Copyright (C) 1996-2017 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 <wchar.h>
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#ifndef WMEMCMP
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# define WMEMCMP wmemcmp
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#endif
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int
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WMEMCMP (const wchar_t *s1, const wchar_t *s2, size_t n)
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{
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wchar_t c1;
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wchar_t c2;
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while (n >= 4)
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{
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c1 = s1[0];
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c2 = s2[0];
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if (c1 - c2 != 0)
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return c1 > c2 ? 1 : -1;
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c1 = s1[1];
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c2 = s2[1];
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if (c1 - c2 != 0)
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return c1 > c2 ? 1 : -1;
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c1 = s1[2];
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c2 = s2[2];
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if (c1 - c2 != 0)
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return c1 > c2 ? 1 : -1;
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c1 = s1[3];
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c2 = s2[3];
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if (c1 - c2 != 0)
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return c1 > c2 ? 1 : -1;
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s1 += 4;
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s2 += 4;
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n -= 4;
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}
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if (n > 0)
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{
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c1 = s1[0];
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c2 = s2[0];
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if (c1 - c2 != 0)
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return c1 > c2 ? 1 : -1;
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++s1;
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++s2;
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--n;
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}
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if (n > 0)
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{
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c1 = s1[0];
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c2 = s2[0];
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if (c1 - c2 != 0)
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return c1 > c2 ? 1 : -1;
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++s1;
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++s2;
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--n;
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}
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if (n > 0)
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{
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c1 = s1[0];
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c2 = s2[0];
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if (c1 - c2 != 0)
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return c1 > c2 ? 1 : -1;
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}
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return 0;
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}
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