50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/* Copyright (C) 1991, 1992 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
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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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 <string.h>
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#include <ctype.h>
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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 lexiographically less than,
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equal to or greater than S2. */
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int
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strcasecmp (s1, s2)
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const char *s1;
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const char *s2;
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{
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register const unsigned char *p1 = (const unsigned char *) s1;
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register const unsigned char *p2 = (const unsigned char *) s2;
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unsigned char c1, c2;
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if (p1 == p2)
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return 0;
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do
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{
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c1 = tolower (*p1++);
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c2 = tolower (*p2++);
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if (c1 == '\0')
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break;
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}
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while (c1 == c2);
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return c1 - c2;
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}
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