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 4.16 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/.


  Copyright 2002 Walter Harms (walter.harmsinformatik.uni-oldenburg.de)

%%%LICENSE_START(GPL_NOVERSION_ONELINE)
Distributed under GPL
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Heavily based on glibc infopages, copyright Free Software Foundation

aeb, 2003, polished a little