--- /dev/null
+#include "case.h"
+
+int case_diffs(s,t)
+register char *s;
+register char *t;
+{
+ register unsigned char x;
+ register unsigned char y;
+
+ for (;;) {
+ x = *s++ - 'A';
+ if (x <= 'Z' - 'A') x += 'a'; else x += 'A';
+ y = *t++ - 'A';
+ if (y <= 'Z' - 'A') y += 'a'; else y += 'A';
+ if (x != y) break;
+ if (!x) break;
+ }
+ return ((int)(unsigned int) x) - ((int)(unsigned int) y);
+}