strops.c

操作系统SunOS 4.1.3版本的源码

/*
 * @(#)strops.c 1.1 92/07/30 Copyr 1985 Sun Micro
 * Assorted string operations
 */

/*
 * Compare strings:  s1>s2: >0  s1==s2: 0  s1<s2: <0
 */
strcmp(s1, s2)
	register char *s1, *s2;
{

	while (*s1 == *s2++)
		if (*s1++=='\0')
			return (0);
	return (*s1 - *--s2);
}

/*
 * Returns the number of
 * non-NULL bytes in string argument.
 */
strlen(s)
	register char *s;
{
	register int n;

	n = 0;
	while (*s++)
		n++;
	return (n);
}