go/src/compress/bzip2/bit_reader.go

type bitReader …

// newBitReader returns a new bitReader reading from r. If r is not
// already an io.ByteReader, it will be converted via a bufio.Reader.
func newBitReader(r io.Reader) bitReader { … }

// ReadBits64 reads the given number of bits and returns them in the
// least-significant part of a uint64. In the event of an error, it returns 0
// and the error can be obtained by calling bitReader.Err().
func (br *bitReader) ReadBits64(bits uint) (n uint64) { … }

func (br *bitReader) ReadBits(bits uint) (n int) { … }

func (br *bitReader) ReadBit() bool { … }

func (br *bitReader) Err() error { … }