#include <ctype.h>
#include <string.h>

int
strcasecmp(const char* _l, const char* _r)
{
    const unsigned char *l = (void*) _l, *r = (void*) _r;
    for (; *l && *r && (*l == *r || tolower(*l) == tolower(*r)); l++, r++)
        ;
    return tolower(*l) - tolower(*r);
}