/**
* @dataProvider getBnNumBytesNumbers
*/
public function testNumBytes(MathAdapterInterface $adapter, $number, $expected)
{
$size = NumberSize::bnNumBytes($adapter, $adapter->hexDec($number));
$this->assertEquals($expected, $size);
}
/**
* @param int|string $integer
* @param bool $fNegative
* @return int|string
*/
public function parseCompact($integer, $fNegative)
{
if (!is_bool($fNegative)) {
throw new \InvalidArgumentException('CompactInteger::read() - flag must be boolean!');
}
$size = (int) NumberSize::bnNumBytes($this, $integer);
if ($this->cmp($size, 3) <= 0) {
$compact = $this->leftShift($this->getLow64($integer), $this->mul(8, $this->sub(3, $size)));
} else {
$compact = $this->rightShift($integer, $this->mul(8, $this->sub($size, 3)));
$compact = $this->getLow64($compact);
}
if ($this->cmp($this->bitwiseAnd($compact, $this->hexDec('00800000')), 0) > 0) {
$compact = $this->rightShift($compact, 8);
$size++;
}
$compact = $this->bitwiseOr($compact, $this->leftShift($size, 24));
if ($fNegative && $this->cmp($this->bitwiseAnd($compact, $this->hexDec('007fffff')), 0) > 0) {
/// ?
$compact = $this->bitwiseOr($compact, $this->hexDec('00800000'));
}
return $compact;
}
