1 files changed, 18 insertions, 0 deletions
diff --git a/missing_d/memcmp.c b/missing_d/memcmp.c
new file mode 100644
index 00000000..63cb5f8f
--- /dev/null
+++ b/missing_d/memcmp.c
@@ -0,0 +1,18 @@
+/*
+ * memcmp --- compare strings.
+ *
+ * We use our own routine since it has to act like strcmp() for return
+ * value, and the BSD manual says bcmp() only returns zero/non-zero.
+ */
+
+int
+memcmp (s1, s2, l)
+register char *s1, *s2;
+register int l;
+{
+	for (; l-- > 0; s1++, s2++) {
+		if (*s1 != *s2)
+			return (*s1 - *s2);
+	}
+	return (0);
+}