fold in strncat.3

[unix-history] / usr / src / lib / libc / string / strcmp.c

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 *
 * %sccs.include.redist.c%
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)strcmp.c	5.4 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <sys/stdc.h>
#include <string.h>

/*
 * Compare strings.
 */
int
strcmp(s1, s2)
	register const char *s1, *s2;
{
	while (*s1 == *s2++)
		if (*s1++ == 0)
			return (0);
	return (*(unsigned char *)s1 - *(unsigned char *)--s2);
}