ref: 26ec24167f2d789373c64a0b3440628f0337cdc3
dir: /src/libscc/casecmp.c/
#include <ctype.h>
#include <scc/scc.h>
int
casecmp(const char *s1, const char *s2)
{
        while (*s1 && toupper(*s1) == toupper(*s2))
                ++s1, ++s2;
        return *s1 - *s2;
}