ruby/missing/strcasecmp.c

/* public domain rewrite of strcasecmp(3) */

#include <ctype.h>

int
strcasecmp(const char *p1, const char *p2)
{
    while (*p1 && *p2) {
	if (toupper(*p1) != toupper(*p2))
	    return toupper(*p1) - toupper(*p2);
	p1++;
	p2++;
    }
    return strlen(p1) - strlen(p2);
}