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68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/* Copyright (C) 1991-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <ctype.h>
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#include <string.h>
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#ifndef _LIBC
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# define __strcasecmp strcasecmp
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# define TOLOWER(Ch) tolower (Ch)
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#else
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# include <locale/localeinfo.h>
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# ifdef USE_IN_EXTENDED_LOCALE_MODEL
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# define __strcasecmp __strcasecmp_l
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# endif
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# define TOLOWER(Ch) __tolower_l ((Ch), loc)
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#endif
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#ifdef USE_IN_EXTENDED_LOCALE_MODEL
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# define LOCALE_PARAM , __locale_t loc
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#else
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# define LOCALE_PARAM
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#endif
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/* Compare S1 and S2, ignoring case, returning less than, equal to or
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greater than zero if S1 is lexicographically less than,
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equal to or greater than S2. */
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int
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__strcasecmp (const char *s1, const char *s2 LOCALE_PARAM)
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{
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#if defined _LIBC && !defined USE_IN_EXTENDED_LOCALE_MODEL
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__locale_t loc = _NL_CURRENT_LOCALE;
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#endif
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const unsigned char *p1 = (const unsigned char *) s1;
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const unsigned char *p2 = (const unsigned char *) s2;
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int result;
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if (p1 == p2)
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return 0;
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while ((result = TOLOWER (*p1) - TOLOWER (*p2++)) == 0)
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if (*p1++ == '\0')
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break;
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return result;
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}
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#ifndef __strcasecmp
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libc_hidden_def (__strcasecmp)
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weak_alias (__strcasecmp, strcasecmp)
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#endif
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