Function prefixEncodeCode

writer.go:539–556

(n int)

}

func prefixEncodeCode(n int) (int, int) {
    if n <= 5 {
        return max(0, n - 1), 0
    }

    shift := 0
    rem := n - 1
    for rem > 3 {
        rem >>= 1
        shift += 1
    }

    if rem == 2 {
        return 2 + 2 * shift, n - (2 << shift) - 1
    }

    return 3 + 2 * shift, n - (3 << shift) - 1
}

func prefixEncodeBits(prefix int) int {
    if prefix < 4 {