/*! \param nbBits number of bits to use at once */
void EncodedData::initialize(unsigned short int nbBits)
{
_swap = nbBits;
_andOperator = andOperator(_swap);
_arrayCount = 0;
_bitCount = 0;
if(_buffer.size()>0)
_car = _buffer.at(0);
}
/*!
\return integer representation of bits read (little indian).
0 if none available
*/
int EncodedData::read()
{
int val = 0;
if(hasNext())
{
int bitsLeft = 8 - _bitCount;
if(bitsLeft < _swap)
{
val = _car & andOperator(bitsLeft);
int bitsRemaining = _swap - bitsLeft;
if(_arrayCount < (unsigned int)_buffer.size() - 1)
{
_car = _buffer.at(_arrayCount + 1);
val += ((_car & andOperator(bitsRemaining)) << bitsLeft);
_car = _car >> bitsRemaining;
_bitCount = bitsRemaining;
}
_arrayCount++;
}
SelectionSet& operator&= (const SelectionSet &ss) { andOperator (ss); return *this; }