NAME

memcpy — copy byte string

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <string.h>

void *
memcpy(void *dst, const void *src, size_t len);

void *
mempcpy(void *dst, const void *src, size_t len);

DESCRIPTION

The memcpy() and mempcpy() functions copy len bytes from string src to string dst. If src and dst overlap, the results are not defined.

RETURN VALUES

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

The mempcpy() function returns a pointer to the byte after the last written byte.

SEE ALSO

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

STANDARDS

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

HISTORY

The memcpy() function first appeared in AT&T System V UNIX and was reimplemented for 4.3BSD-Tahoe. The mempcpy() function first appeared in FreeBSD 13.1.