#include <ctype.h>

#ifndef HAVE_STRCASESTR
char *
strcasestr (char *haystack, char *needle)
{
	char *p, *startn = 0, *np = 0;

	for (p = haystack; *p; p++) {
		if (np) {
			if (toupper(*p) == toupper(*np)) {
				if (!*++np)
					return startn;
			} else
				np = 0;
		} else if (toupper(*p) == toupper(*needle)) {
			np = needle + 1;
			startn = p;
		}
	}

	return 0;
}
#endif