'\" t
.\" Copyright, Free Software Foundation
.\" Copyright 2002, Walter Harms <walter.harms@informatik.uni-oldenburg.de>
.\" Copyright, the authors of the Linux man-pages project
.\"
.\" SPDX-License-Identifier: GPL-1.0-or-later
.\"
.TH mempcpy 3 2026-08-10 "Linux man-pages 6.19"
.SH NAME
mempcpy \- memory return-offset-pointer copy
.SH LIBRARY
Standard C library
.RI ( libc ,\~ \-lc )
.SH SYNOPSIS
.nf
.BR "#define _GNU_SOURCE" "         /* See feature_test_macros(7) */"
.BR #include\~<string.h> "  // see memory.h(3head)"
.P
.BR "void *mempcpy(" "size_t n;"
.BI "              void " dest "[restrict " n "], const void " src "[restrict " n ],
.BI "              size_t " n );
.fi
.SH DESCRIPTION
This function is similar to
.BR memcpy (3),
but it returns a pointer to
one past the last written byte.
.P
It is equivalent to
.P
.in +4n
.EX
memcpy(dest, src, n) + n
.EE
.in
.SH RETURN VALUE
.I dest
+
.IR n .
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.TS
allbox;
lbx lb lb
l l l.
Interface	Attribute	Value
T{
.na
.nh
.BR mempcpy ()
T}	Thread safety	MT-Safe
.TE
.SH STANDARDS
GNU.
.SH HISTORY
glibc 2.1.
.SH EXAMPLES
.EX
void *
combine(void *o1, size_t s1, void *o2, size_t s2)
{
    void *result = malloc(s1 + s2);
    if (result != NULL)
        mempcpy(mempcpy(result, o1, s1), o2, s2);
    return result;
}
.EE
.SH SEE ALSO
.BR memory.h (3head),
.BR memccpy (3),
.BR memcpy (3),
.BR wmempcpy (3)