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44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
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/* Copyright (C) 1991 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 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
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <string.h>
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#include <memcopy.h>
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/* Compare S1 and S2, 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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DEFUN(strcmp, (p1, p2), CONST char *p1 AND CONST char *p2)
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{
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register CONST unsigned char *s1 = (CONST unsigned char *) p1;
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register CONST unsigned char *s2 = (CONST unsigned char *) p2;
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unsigned reg_char c1, c2;
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do
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{
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c1 = (unsigned char) *s1++;
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c2 = (unsigned char) *s2++;
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if (c1 == '\0')
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return c1 - c2;
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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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