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.
dest +
n.
mempcpy() first appeared in glibc in version 2.1.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| mempcpy (), wmempcpy () |
Thread safety |
MT-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)