#define _GNU_SOURCE #include <string.h> void *mempcpy(void * dest , const void * src , size_t n );
#define _GNU_SOURCE
#include <wchar.h>
wchar_t *wmempcpy(wchar_t * dest , const wchar_t * src , size_t n );
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;
}