mempcpy man page

mempcpy, wmempcpy — copy memory area


#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);


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.


mempcpy() first appeared in glibc in version 2.1.


For an explanation of the terms used in this section, see attributes(7).

mempcpy(), wmempcpy()Thread safetyMT-Safe

Conforming to

This function is a GNU extension.


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)

Referenced By

memcpy(3), memstomp(1), wmemcpy(3).

Explore man page connections for mempcpy(3).

wmempcpy(3) is an alias of mempcpy(3).