NetBSD/lib/libc/string/memcpy.3

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.\" Copyright (c) 1990, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
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.\" This code is derived from software contributed to Berkeley by
.\" Chris Torek and the American National Standards Committee X3,
.\" on Information Processing Systems.
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.\" from: @(#)memcpy.3 8.1 (Berkeley) 6/4/93
.\" $NetBSD: memcpy.3,v 1.13 2003/09/08 17:54:33 wiz Exp $
.\"
.Dd June 4, 1993
.Dt MEMCPY 3
.Os
.Sh NAME
.Nm memcpy
.Nd copy byte string
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In string.h
.Ft void *
.Fn memcpy "void * restrict dst" "const void * restrict src" "size_t len"
.Sh DESCRIPTION
The
.Fn memcpy
function
copies
.Fa len
bytes from string
.Fa src
to string
.Fa dst .
The arguments must not overlap -- behavior if the arguments overlap is
undefined.
To copy byte strings that overlap, use
.Xr memmove 3 .
.Sh RETURN VALUES
The
.Fn memcpy
function
returns the original value of
.Fa dst .
.Sh SEE ALSO
.Xr bcopy 3 ,
.Xr memccpy 3 ,
.Xr memmove 3 ,
.Xr strcpy 3
.Sh STANDARDS
The
.Fn memcpy
function
conforms to
.St -isoC-99 .