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).

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 4.15 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/.