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// Read bits from a bit stream. See BitWriter for writing.
#ifndef BITSTREAM_HH
#define BITSTREAM_HH
#include <cstddef>
class BitStream
{
public:
BitStream(unsigned char const* p, size_t nbytes);
void reset();
unsigned long long getBits(size_t nbits);
long long getBitsSigned(size_t nbits);
// Only call getBitsInt when requesting a number of bits that definitely fit in an int.
int getBitsInt(size_t nbits);
void skipToNextByte();
private:
unsigned char const* start;
size_t nbytes;
unsigned char const* p;
size_t bit_offset;
size_t bits_available;
};
#endif // BITSTREAM_HH
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