wmempcpy (3)

#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.

dest + n.

mempcpy() first appeared in glibc in version 2.1.

Multithreading (see pthreads(7))

The mempcpy() and wmempcpy() functions are thread-safe.

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;
}

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

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