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-rw-r--r--byte_diff.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/byte_diff.c b/byte_diff.c
new file mode 100644
index 0000000..cdbd760
--- /dev/null
+++ b/byte_diff.c
@@ -0,0 +1,16 @@
+#include "byte.h"
+
+int byte_diff(s,n,t)
+register char *s;
+register unsigned int n;
+register char *t;
+{
+ for (;;) {
+ if (!n) return 0; if (*s != *t) break; ++s; ++t; --n;
+ if (!n) return 0; if (*s != *t) break; ++s; ++t; --n;
+ if (!n) return 0; if (*s != *t) break; ++s; ++t; --n;
+ if (!n) return 0; if (*s != *t) break; ++s; ++t; --n;
+ }
+ return ((int)(unsigned int)(unsigned char) *s)
+ - ((int)(unsigned int)(unsigned char) *t);
+}