1 files changed, 18 insertions, 0 deletions
diff --git a/case_diffb.c b/case_diffb.c
new file mode 100644
index 0000000..b62a4b2
--- /dev/null
+++ b/case_diffb.c
@@ -0,0 +1,18 @@
+#include "case.h"
+
+int case_diffb(register const char *s,register unsigned int len,register const char *t)
+{
+  register unsigned char x;
+  register unsigned char y;
+
+  while (len > 0) {
+    --len;
+    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)
+      return ((int)(unsigned int) x) - ((int)(unsigned int) y);
+  }
+  return 0;
+}