SyncSafe

int synchsafe(int in)
{
    int out, mask = 0x7F;

    while (mask ^ 0x7FFFFFFF) {
        out = in & ~mask;
        out <<= 1;
        out |= in & mask;
        mask = ((mask + 1) << 8) - 1;
        in = out;
    }

    return out;
}

int unsynchsafe(int in)
{
    int out = 0, mask = 0x7F000000;

    while (mask) {
        out >>= 1;
        out |= in & mask;
        mask >>= 8;
    }

    return out;
}

// Wikipedia Implementation
// Source: https://en.wikipedia.org/wiki/Synchsafe