1 files changed, 32 insertions, 0 deletions
diff --git a/lib/memcmp.c b/lib/memcmp.c
new file mode 100644
index 00000000..339b5818
--- /dev/null
+++ b/lib/memcmp.c
@@ -0,0 +1,32 @@
+/* memcmp.c -- compare memory.
+   Return:
+   <0 if S1 < S2,
+   0 if strings are identical,
+   >0 if S1 > S2.
+   Stops looking after N characters.  Doesn't stop at nulls.
+   In the public domain.
+   By David MacKenzie <djm@gnu.ai.mit.edu>. */
+
+#include <sys/types.h>
+
+int
+#if __STDC__
+memcmp (void const *v1, void const *v2, size_t n)
+{
+  register char *s1 = (char *) v1, *s2 = (char *) v2;
+#else
+memcmp (s1, s2, n)
+     register char *s1, *s2;
+     register unsigned n;
+{
+#endif
+  register int diff;
+
+  while (n--)
+    {
+      diff = *s1++ - *s2++;
+      if (diff)
+	return diff;
+    }
+  return 0;
+}