Provides basic interfaces to read and traverse an io.Reader as a stream of bits, rather than a stream of bytes.

$ go get github.com/32bitkid/bitreader

Ever wanted to count the number of 0 bits from the start of a file?

file, _ := os.Open("file")
br := bitreader.NewBitReader(file)
n := 0
for {
    val, err := br.ReadBit()
    if err != nil || val == true {
        break
    }
    n += 1
}
fmt.Printf("The file starts with %d off bits", n)

But seriously, this is used for parsing densely packed binary formats where data may not be byte aligned. For example, decoding values packed with Huffman Coding.