Function powerOf2

extra/yassl/taocrypt/test/memory.cpp:267–282

return power of 2 up to size_tracker elements

// return power of 2 up to size_tracker elements
size_t powerOf2(size_t sz)
{
    size_t shifts = 0;

    if (sz)
        sz -= 1;
    else
        return 0;
	   
    while (sz) {
        sz >>= 1;
        ++shifts;
    }

    return shifts < size_elements ? shifts : size_elements;
}


} // namespace local