#include <memory.h>
void *memchr (void *s, int c, size_t n) - Search for a character in a buffer.
int memcmp (void *s1, void *s2, size_t n) - Compare two buffers.
void *memcpy (void *dest, void *src, size_t n) - Copy one buffer into another .
void *memmove (void *dest, void *src, size_t n) - Move a number of bytes from one buffer lo another.
void *memset (void *s, int c, size_t n) - Set all bytes of a buffer to a given character.