Package bitstream is a library for reading and writing streams of bits.
A bitstream.Reader supports reading variable-width bit fields sequentially
out of a stream of bytes supplied by an
io.Reader.
A bitstream.Writer supports writing variable-width bit fields sequentially to
a stream of bytes consumed by an io.Writer.
These types are useful for processing data that are not divided on even byte boundaries, such as compressed or bit-packed data. This package only supports sequential processing, not random-access.
Bit values are exchanged as uint64 values, with the data packed into the
low-order bits of the word.