fountain

Documentation

Overview

Package fountain implements the fountain encoding used by the Uniform Resources (UR) format described in BCR-2020-005.

Index

• func Checksum(data []byte) uint32
• func Encode(message []byte, seqNum, seqLen int) []byte
• func SeqNumFor(seqLen int, checksum uint32, fragments []int) int
• type Decoder
  • func (d *Decoder) Add(data []byte) error
  • func (d *Decoder) Progress() float32
  • func (d *Decoder) Result() ([]byte, error)

Functions

func Checksum

func Checksum(data []byte) uint32

func Encode

func Encode(message []byte, seqNum, seqLen int) []byte

func SeqNumFor

func SeqNumFor(seqLen int, checksum uint32, fragments []int) int

SeqNumFor searches for a seqNum that outpus the xor of fragments.

Types

type Decoder

type Decoder struct {
	// contains filtered or unexported fields
}

func (*Decoder) Add

func (d *Decoder) Add(data []byte) error

func (*Decoder) Progress

func (d *Decoder) Progress() float32

func (*Decoder) Result

func (d *Decoder) Result() ([]byte, error)