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.

STANDARDS

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

BUGS

In this implementation memcpy() and mempcpy() are implemented using bcopy(3), and therefore the strings may overlap. On other systems, copying overlapping strings may produce surprises. Programs intended to be portable should use memmove(3) when src and dst may overlap.