40 lines
871 B
C
40 lines
871 B
C
/*-------------------------------------------------------------------------
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*
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* memcmp.c
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* compares memory bytes
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*
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* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/port/memcmp.c,v 1.3 2003/08/04 02:40:20 momjian Exp $
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*
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* This file was taken from NetBSD and is used by SunOS because memcmp
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* on that platform does not properly compare negative bytes.
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*
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*-------------------------------------------------------------------------
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*/
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#include <string.h>
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/*
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* Compare memory regions.
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*/
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int
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memcmp(const void *s1, const void *s2, size_t n)
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{
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if (n != 0)
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{
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const unsigned char *p1 = s1,
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*p2 = s2;
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do
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{
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if (*p1++ != *p2++)
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return (*--p1 - *--p2);
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} while (--n != 0);
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}
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return 0;
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}
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