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-rw-r--r--missing/memcmp.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/missing/memcmp.c b/missing/memcmp.c
new file mode 100644
index 0000000..762eaf5
--- /dev/null
+++ b/missing/memcmp.c
@@ -0,0 +1,21 @@
+/*
+ * memcmp --- compare memories.
+ *
+ */
+
+int
+memcmp(s1,s2,len)
+ char *s1;
+ char *s2;
+ register int len;
+{
+ register unsigned char *a = (unsigned char*)s1;
+ register unsigned char *b = (unsigned char*)s2;
+ register int tmp;
+
+ while (len--) {
+ if (tmp = *a++ - *b++)
+ return tmp;
+ }
+ return 0;
+}