struct s
{
    long long size;
    int type
};
a;
fn1 ()
{
    for (;;)
    {
        struct s b;
        int c = fn2 (a, &b);
        if (c == 0)
            break;
        if (b.type)
        {
            fn3 ()? fn4 (b.type, b.size) : 0;
            return;
        }
        fn3 ()? fn4 (b.type >> b.size) : 0;
        if (b.size > c)
            fn5 (a, b.size - c);
    }
}