memcpy

#include <stddef.h> /* size_t */

void *memcpy(void *dest, const void *src, size_t n)

void *memcpy(void *dest, const void *src, size_t n)
{
    char *dp = dest;
    const char *sp = src;
    while (n--)
        *dp++ = *sp++;
    return dest;
}