MEMPCPY

Section: Linux Programmer's Manual (3)
Updated: 2015-03-02
Index Return to Main Contents

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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
mempcpy(), wmempcpy()	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; }  

SEE ALSO

memccpy(3), memcpy(3), memmove(3), wmemcpy(3)  

COLOPHON

This page is part of release 4.13 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/.

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Index

NAME

SYNOPSIS

DESCRIPTION

RETURN VALUE

VERSIONS

ATTRIBUTES

CONFORMING TO

EXAMPLE

SEE ALSO

COLOPHON