ref: 4462308d95e9aede0ea42f4262bb082007beb427
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;
}