package utils

import "github.com/boombuler/barcode/utils"

Package utils contain some utilities which are needed to create barcodes

Index ¶

• func IntToRune(i int) rune
• func New1DCode(codeKind, content string, bars *BitList) barcode.Barcode
• func New1DCodeIntCheckSum(codeKind, content string, bars *BitList, checksum int) barcode.BarcodeIntCS
• func RuneToInt(r rune) int
• type BitList
• func NewBitList(capacity int) *BitList
• func (bl *BitList) AddBit(bits ...bool)
• func (bl *BitList) AddBits(b int, count byte)
• func (bl *BitList) AddByte(b byte)
• func (bl *BitList) GetBit(index int) bool
• func (bl *BitList) GetBytes() []byte
• func (bl *BitList) IterateBytes() <-chan byte
• func (bl *BitList) Len() int
• func (bl *BitList) SetBit(index int, value bool)
• type GFPoly
• func NewGFPoly(field *GaloisField, coefficients []int) *GFPoly
• func NewMonominalPoly(field *GaloisField, degree int, coeff int) *GFPoly
• func (gp *GFPoly) AddOrSubstract(other *GFPoly) *GFPoly
• func (gp *GFPoly) Degree() int
• func (gp *GFPoly) Divide(other *GFPoly) (quotient *GFPoly, remainder *GFPoly)
• func (gp *GFPoly) GetCoefficient(degree int) int
• func (gp *GFPoly) MultByMonominal(degree int, coeff int) *GFPoly
• func (gp *GFPoly) Multiply(other *GFPoly) *GFPoly
• func (gp *GFPoly) Zero() bool
• type GaloisField
• func NewGaloisField(pp, fieldSize, b int) *GaloisField
• func (gf *GaloisField) AddOrSub(a, b int) int
• func (gf *GaloisField) Divide(a, b int) int
• func (gf *GaloisField) Invers(num int) int
• func (gf *GaloisField) Multiply(a, b int) int
• func (gf *GaloisField) Zero() *GFPoly
• type ReedSolomonEncoder
• func NewReedSolomonEncoder(gf *GaloisField) *ReedSolomonEncoder
• func (rs *ReedSolomonEncoder) Encode(data []int, eccCount int) []int

Functions ¶

func IntToRune ¶

func IntToRune(i int) rune

IntToRune converts a digit 0 - 9 to the rune '0' - '9'. If the given int is outside of this range 'F' is returned!

func New1DCode ¶

func New1DCode(codeKind, content string, bars *BitList) barcode.Barcode

New1DCode creates a new 1D barcode where the bars are represented by the bits in the bars BitList

func New1DCodeIntCheckSum ¶

func New1DCodeIntCheckSum(codeKind, content string, bars *BitList, checksum int) barcode.BarcodeIntCS

New1DCode creates a new 1D barcode where the bars are represented by the bits in the bars BitList

func RuneToInt ¶

func RuneToInt(r rune) int

RuneToInt converts a rune between '0' and '9' to an integer between 0 and 9 If the rune is outside of this range -1 is returned.

Types ¶

type BitList ¶

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

BitList is a list that contains bits

func NewBitList ¶

func NewBitList(capacity int) *BitList

NewBitList returns a new BitList with the given length all bits are initialize with false

func (*BitList) AddBit ¶

func (bl *BitList) AddBit(bits ...bool)

AddBit appends the given bits to the end of the list

func (*BitList) AddBits ¶

func (bl *BitList) AddBits(b int, count byte)

AddBits appends the last (LSB) 'count' bits of 'b' the the end of the list

func (*BitList) AddByte ¶

func (bl *BitList) AddByte(b byte)

AddByte appends all 8 bits of the given byte to the end of the list

func (*BitList) GetBit ¶

func (bl *BitList) GetBit(index int) bool

GetBit returns the bit at the given index

func (*BitList) GetBytes ¶

func (bl *BitList) GetBytes() []byte

GetBytes returns all bits of the BitList as a []byte

func (*BitList) IterateBytes ¶

func (bl *BitList) IterateBytes() <-chan byte

IterateBytes iterates through all bytes contained in the BitList

func (*BitList) Len ¶

func (bl *BitList) Len() int

Len returns the number of contained bits

func (*BitList) SetBit ¶

func (bl *BitList) SetBit(index int, value bool)

SetBit sets the bit at the given index to the given value

type GFPoly ¶

type GFPoly struct {
	Coefficients []int
	// contains filtered or unexported fields
}

func NewGFPoly ¶

func NewGFPoly(field *GaloisField, coefficients []int) *GFPoly

func NewMonominalPoly ¶

func NewMonominalPoly(field *GaloisField, degree int, coeff int) *GFPoly

func (*GFPoly) AddOrSubstract ¶

func (gp *GFPoly) AddOrSubstract(other *GFPoly) *GFPoly

func (*GFPoly) Degree ¶

func (gp *GFPoly) Degree() int

func (*GFPoly) Divide ¶

func (gp *GFPoly) Divide(other *GFPoly) (quotient *GFPoly, remainder *GFPoly)

func (*GFPoly) GetCoefficient ¶

func (gp *GFPoly) GetCoefficient(degree int) int

GetCoefficient returns the coefficient of x ^ degree

func (*GFPoly) MultByMonominal ¶

func (gp *GFPoly) MultByMonominal(degree int, coeff int) *GFPoly

func (*GFPoly) Multiply ¶

func (gp *GFPoly) Multiply(other *GFPoly) *GFPoly

func (*GFPoly) Zero ¶

func (gp *GFPoly) Zero() bool

type GaloisField ¶

type GaloisField struct {
	Size    int
	Base    int
	ALogTbl []int
	LogTbl  []int
}

GaloisField encapsulates galois field arithmetics

func NewGaloisField ¶

func NewGaloisField(pp, fieldSize, b int) *GaloisField

NewGaloisField creates a new galois field

func (*GaloisField) AddOrSub ¶

func (gf *GaloisField) AddOrSub(a, b int) int

AddOrSub add or substract two numbers

func (*GaloisField) Divide ¶

func (gf *GaloisField) Divide(a, b int) int

Divide divides two numbers

func (*GaloisField) Invers ¶

func (gf *GaloisField) Invers(num int) int

func (*GaloisField) Multiply ¶

func (gf *GaloisField) Multiply(a, b int) int

Multiply multiplys two numbers

func (*GaloisField) Zero ¶

func (gf *GaloisField) Zero() *GFPoly

type ReedSolomonEncoder ¶

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

func NewReedSolomonEncoder ¶

func NewReedSolomonEncoder(gf *GaloisField) *ReedSolomonEncoder

func (*ReedSolomonEncoder) Encode ¶

func (rs *ReedSolomonEncoder) Encode(data []int, eccCount int) []int

Source Files ¶

base1dcode.go bitlist.go galoisfield.go gfpoly.go reedsolomon.go runeint.go