Function add_64

src/engine/execnt.cpp:712–722

 */

static FILETIME add_64
(
    unsigned long h1, unsigned long l1,
    unsigned long h2, unsigned long l2
)
{
    FILETIME result;
    result.dwLowDateTime = l1 + l2;
    result.dwHighDateTime = add_64_hi( h1, l1, h2, l2 );
    return result;
}


static FILETIME add_FILETIME( FILETIME t1, FILETIME t2 )