ref: 5750587d1344416e2a6d6ee1395e250558de97ac
dir: /src/libscc/casecmp.c/
static char sccsid[] = "@(#) ./lib/scc/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;
}