mempcpy

(3)

copy memory area

Library functionsmanpages-dev 6.9.1-1also documents wmempcpy

#define _GNU_SOURCE /* See feature_test_macros(7) */ #include <string.h> void *mempcpy(void dest[restrict .n], const void src[restrict .n], size_t n); #define _GNU_SOURCE /* See feature_test_macros(7) */ #include <wchar.h> wchar_t *wmempcpy(wchar_t dest[restrict .n], const wchar_t src[restrict .n], size_t n);

LIBRARY

Standard C library (libc, -lc)

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.

ATTRIBUTES

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

Interface	Attribute	Value
mempcpy (), wmempcpy ()	Thread safety	MT-Safe

STANDARDS

GNU.

HISTORY

glibc 2.1.

EXAMPLES

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;
}