5.8 memcpy—copy memory regions

Synopsis

#include <string.h>
void* memcpy(void *restrict out, const void *restrict in,
    size_t n);

Description
This function copies n bytes from the memory region pointed to by in to the memory region pointed to by out.

If the regions overlap, the behavior is undefined.

Returns
memcpy returns a pointer to the first byte of the out region.

Portability
memcpy is ANSI C.

memcpy requires no supporting OS subroutines.