--- /dev/null
+/* Public domain. */
+#include <stddef.h>
+
+int
+memcmp (const void *str1, const void *str2, size_t count)
+{
+ const unsigned char *s1 = str1;
+ const unsigned char *s2 = str2;
+
+ while (count-- > 0)
+ {
+ if (*s1++ != *s2++)
+ return s1[-1] < s2[-1] ? -1 : 1;
+ }
+ return 0;
+}