// This code is Public Domain. Use, modify, and redistribute at will.
// ----------------------------------------------------------------------------
-int memcmp( const void * s1, const void * s2, size_t n ) { /* TODO */ };
+#include <__size_t.h>
+
+int memcmp( const void * src_1, const void * src_2, size_t n )
+{
+ const unsigned char * p1 = (const unsigned char *) src_1;
+ const unsigned char * p2 = (const unsigned char *) src_2;
+ while ( n-- )
+ {
+ if ( *p1 != *p2 )
+ {
+ return *p2 - *p1;
+ }
+ ++p1;
+ ++p2;
+ }
+ return 0;
+}