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GNU
2015-03-02
Aliases: wmempcpy(3), wmempcpy(3), wmempcpy(3), wmempcpy(3), wmempcpy(3), wmempcpy(3)

manpages-dev

Manual pages about using GNU/Linux for development

man-pages

Linux kernel and C library user-space interface documentation

NAME

mempcpy, wmempcpy - copy memory area

SYNOPSIS

#define _GNU_SOURCE         /* See feature_test_macros(7) */
#include <string.h>

void *mempcpy(void *dest, const void *src, size_t n);
#define _GNU_SOURCE /* See feature_test_macros(7) */ #include <wchar.h>
wchar_t *wmempcpy(wchar_t *dest, const wchar_t *src, size_t n);

DESCRIPTION

The mempcpy() function is nearly identical to the memcpy(3) function. It copies n bytes from the object beginning at src into the object pointed to by dest. But instead of returning the value of dest it returns a pointer to the byte following the last written byte.
This function is useful in situations where a number of objects shall be copied to consecutive memory positions.
The wmempcpy() function is identical but takes wchar_t type arguments and copies n wide characters.

RETURN VALUE

dest + n.

VERSIONS

mempcpy() first appeared in glibc in version 2.1.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
Interface Attribute Value
Thread safety MT-Safe

CONFORMING TO

This function is a GNU extension.

EXAMPLE

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; }

COLOPHON

This page is part of release 5.00 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

REFERENCED BY

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