MEMCPY(3) Library Functions Manual MEMCPY(3)

memcpycopy memory area

Standard C Library (libc, -lc)

#include <string.h>

void *
memcpy(void *restrict dst, const void *restrict src, size_t n);

The () function copies n bytes from memory area src to memory area dst. If dst and src overlap, behavior is undefined. Applications in which dst and src might overlap should use memmove(3) instead.

The memcpy() function returns the original value of dst.

bcopy(3), memccpy(3), memmove(3), strcpy(3), wmemcpy(3)

The memcpy() function conforms to ISO/IEC 9899:1990 (“ISO C90”).

June 4, 1993 macOS 15.2