/*
 * strcasecmp.c : Case-insensitive string comparison routines
 *
 * George Ferguson, ferguson@cs.rochester.edu, 23 Apr 1993.
 */

#define ISUPPER(C) ((C) >= 'A' && (C) <= 'Z')
#define TOLOWER(C) ((C) - 'A' + 'a')
#define NORMAL(C) (ISUPPER(C) ? TOLOWER(C) : (C))

int
strcasecmp(s1,s2)
char *s1,*s2;
{
    char c1,c2;

    while (1) {
	c1 = NORMAL(*s1);
	c2 = NORMAL(*s2);
	if (c1 != c2)
	    return(c1-c2);
	else if (c1 == '\0')
	    return(0);
	else {
	    s1 += 1;
	    s2 += 1;
	}
    }
    /*NOTREACHED*/
}

int
strncasecmp(s1,s2,n)
char *s1,*s2;
int n;
{
    char c1,c2;

    while (n-- > 0) {
	c1 = NORMAL(*s1);
	c2 = NORMAL(*s2);
	if (c1 != c2)
	    return(c1-c2);
	else if (c1 == '\0')
	    return(0);
	else {
	    s1 += 1;
	    s2 += 1;
	}
    }
    return(0);
}