forked from forgejo/forgejo
Two factor authentication support (#630)
* Initial commit for 2FA support Signed-off-by: Andrew <write@imaginarycode.com> * Add vendored files * Add missing depends * A few clean ups * Added improvements, proper encryption * Better encryption key * Simplify "key" generation * Make 2FA enrollment page more robust * Fix typo * Rename twofa/2FA to TwoFactor * UNIQUE INDEX -> UNIQUE
This commit is contained in:
Andrew
Lunny Xiao
parent
64375d875b
commit
6dd096b7f0
40 changed files with 3395 additions and 8 deletions
66
vendor/github.com/boombuler/barcode/qr/alphanumeric.go
generated
vendored
Normal file
66
vendor/github.com/boombuler/barcode/qr/alphanumeric.go
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@ -0,0 +1,66 @@
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package qr
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import (
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"errors"
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"fmt"
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"strings"
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"github.com/boombuler/barcode/utils"
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)
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const charSet string = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:"
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func stringToAlphaIdx(content string) <-chan int {
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result := make(chan int)
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go func() {
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for _, r := range content {
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idx := strings.IndexRune(charSet, r)
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result <- idx
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if idx < 0 {
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break
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}
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}
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close(result)
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}()
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return result
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}
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func encodeAlphaNumeric(content string, ecl ErrorCorrectionLevel) (*utils.BitList, *versionInfo, error) {
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contentLenIsOdd := len(content)%2 == 1
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contentBitCount := (len(content) / 2) * 11
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if contentLenIsOdd {
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contentBitCount += 6
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}
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vi := findSmallestVersionInfo(ecl, alphaNumericMode, contentBitCount)
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if vi == nil {
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return nil, nil, errors.New("To much data to encode")
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}
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res := new(utils.BitList)
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res.AddBits(int(alphaNumericMode), 4)
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res.AddBits(len(content), vi.charCountBits(alphaNumericMode))
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encoder := stringToAlphaIdx(content)
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for idx := 0; idx < len(content)/2; idx++ {
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c1 := <-encoder
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c2 := <-encoder
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if c1 < 0 || c2 < 0 {
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return nil, nil, fmt.Errorf("\"%s\" can not be encoded as %s", content, AlphaNumeric)
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}
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res.AddBits(c1*45+c2, 11)
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}
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if contentLenIsOdd {
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c := <-encoder
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if c < 0 {
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return nil, nil, fmt.Errorf("\"%s\" can not be encoded as %s", content, AlphaNumeric)
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}
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res.AddBits(c, 6)
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}
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addPaddingAndTerminator(res, vi)
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return res, vi, nil
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}
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23
vendor/github.com/boombuler/barcode/qr/automatic.go
generated
vendored
Normal file
23
vendor/github.com/boombuler/barcode/qr/automatic.go
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vendored
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@ -0,0 +1,23 @@
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package qr
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import (
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"fmt"
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"github.com/boombuler/barcode/utils"
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)
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func encodeAuto(content string, ecl ErrorCorrectionLevel) (*utils.BitList, *versionInfo, error) {
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bits, vi, _ := Numeric.getEncoder()(content, ecl)
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if bits != nil && vi != nil {
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return bits, vi, nil
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}
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bits, vi, _ = AlphaNumeric.getEncoder()(content, ecl)
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if bits != nil && vi != nil {
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return bits, vi, nil
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}
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bits, vi, _ = Unicode.getEncoder()(content, ecl)
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if bits != nil && vi != nil {
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return bits, vi, nil
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}
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return nil, nil, fmt.Errorf("No encoding found to encode \"%s\"", content)
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}
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59
vendor/github.com/boombuler/barcode/qr/blocks.go
generated
vendored
Normal file
59
vendor/github.com/boombuler/barcode/qr/blocks.go
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package qr
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type block struct {
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data []byte
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ecc []byte
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}
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type blockList []*block
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func splitToBlocks(data <-chan byte, vi *versionInfo) blockList {
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result := make(blockList, vi.NumberOfBlocksInGroup1+vi.NumberOfBlocksInGroup2)
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for b := 0; b < int(vi.NumberOfBlocksInGroup1); b++ {
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blk := new(block)
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blk.data = make([]byte, vi.DataCodeWordsPerBlockInGroup1)
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for cw := 0; cw < int(vi.DataCodeWordsPerBlockInGroup1); cw++ {
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blk.data[cw] = <-data
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}
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blk.ecc = ec.calcECC(blk.data, vi.ErrorCorrectionCodewordsPerBlock)
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result[b] = blk
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}
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for b := 0; b < int(vi.NumberOfBlocksInGroup2); b++ {
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blk := new(block)
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blk.data = make([]byte, vi.DataCodeWordsPerBlockInGroup2)
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for cw := 0; cw < int(vi.DataCodeWordsPerBlockInGroup2); cw++ {
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blk.data[cw] = <-data
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}
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blk.ecc = ec.calcECC(blk.data, vi.ErrorCorrectionCodewordsPerBlock)
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result[int(vi.NumberOfBlocksInGroup1)+b] = blk
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}
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return result
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}
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func (bl blockList) interleave(vi *versionInfo) []byte {
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var maxCodewordCount int
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if vi.DataCodeWordsPerBlockInGroup1 > vi.DataCodeWordsPerBlockInGroup2 {
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maxCodewordCount = int(vi.DataCodeWordsPerBlockInGroup1)
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} else {
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maxCodewordCount = int(vi.DataCodeWordsPerBlockInGroup2)
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}
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resultLen := (vi.DataCodeWordsPerBlockInGroup1+vi.ErrorCorrectionCodewordsPerBlock)*vi.NumberOfBlocksInGroup1 +
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(vi.DataCodeWordsPerBlockInGroup2+vi.ErrorCorrectionCodewordsPerBlock)*vi.NumberOfBlocksInGroup2
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result := make([]byte, 0, resultLen)
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for i := 0; i < maxCodewordCount; i++ {
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for b := 0; b < len(bl); b++ {
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if len(bl[b].data) > i {
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result = append(result, bl[b].data[i])
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}
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}
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}
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for i := 0; i < int(vi.ErrorCorrectionCodewordsPerBlock); i++ {
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for b := 0; b < len(bl); b++ {
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result = append(result, bl[b].ecc[i])
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}
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}
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return result
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}
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416
vendor/github.com/boombuler/barcode/qr/encoder.go
generated
vendored
Normal file
416
vendor/github.com/boombuler/barcode/qr/encoder.go
generated
vendored
Normal file
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@ -0,0 +1,416 @@
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// Package qr can be used to create QR barcodes.
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package qr
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import (
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"image"
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"github.com/boombuler/barcode"
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"github.com/boombuler/barcode/utils"
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)
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type encodeFn func(content string, eccLevel ErrorCorrectionLevel) (*utils.BitList, *versionInfo, error)
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// Encoding mode for QR Codes.
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type Encoding byte
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const (
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// Auto will choose ths best matching encoding
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Auto Encoding = iota
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// Numeric encoding only encodes numbers [0-9]
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Numeric
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// AlphaNumeric encoding only encodes uppercase letters, numbers and [Space], $, %, *, +, -, ., /, :
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AlphaNumeric
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// Unicode encoding encodes the string as utf-8
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Unicode
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// only for testing purpose
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unknownEncoding
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)
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func (e Encoding) getEncoder() encodeFn {
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switch e {
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case Auto:
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return encodeAuto
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case Numeric:
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return encodeNumeric
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case AlphaNumeric:
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return encodeAlphaNumeric
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case Unicode:
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return encodeUnicode
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}
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return nil
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}
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func (e Encoding) String() string {
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switch e {
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case Auto:
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return "Auto"
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case Numeric:
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return "Numeric"
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case AlphaNumeric:
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return "AlphaNumeric"
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case Unicode:
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return "Unicode"
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}
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return ""
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}
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// Encode returns a QR barcode with the given content, error correction level and uses the given encoding
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func Encode(content string, level ErrorCorrectionLevel, mode Encoding) (barcode.Barcode, error) {
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bits, vi, err := mode.getEncoder()(content, level)
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if err != nil {
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return nil, err
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}
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blocks := splitToBlocks(bits.IterateBytes(), vi)
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data := blocks.interleave(vi)
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result := render(data, vi)
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result.content = content
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return result, nil
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}
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func render(data []byte, vi *versionInfo) *qrcode {
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dim := vi.modulWidth()
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results := make([]*qrcode, 8)
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for i := 0; i < 8; i++ {
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results[i] = newBarcode(dim)
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}
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occupied := newBarcode(dim)
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setAll := func(x int, y int, val bool) {
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occupied.Set(x, y, true)
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for i := 0; i < 8; i++ {
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results[i].Set(x, y, val)
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}
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}
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drawFinderPatterns(vi, setAll)
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drawAlignmentPatterns(occupied, vi, setAll)
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//Timing Pattern:
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var i int
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for i = 0; i < dim; i++ {
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if !occupied.Get(i, 6) {
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setAll(i, 6, i%2 == 0)
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}
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if !occupied.Get(6, i) {
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setAll(6, i, i%2 == 0)
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}
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}
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// Dark Module
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setAll(8, dim-8, true)
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drawVersionInfo(vi, setAll)
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drawFormatInfo(vi, -1, occupied.Set)
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for i := 0; i < 8; i++ {
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drawFormatInfo(vi, i, results[i].Set)
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}
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// Write the data
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var curBitNo int
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for pos := range iterateModules(occupied) {
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var curBit bool
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if curBitNo < len(data)*8 {
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curBit = ((data[curBitNo/8] >> uint(7-(curBitNo%8))) & 1) == 1
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} else {
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curBit = false
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}
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for i := 0; i < 8; i++ {
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setMasked(pos.X, pos.Y, curBit, i, results[i].Set)
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}
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curBitNo++
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}
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lowestPenalty := ^uint(0)
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lowestPenaltyIdx := -1
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for i := 0; i < 8; i++ {
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p := results[i].calcPenalty()
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if p < lowestPenalty {
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lowestPenalty = p
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lowestPenaltyIdx = i
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}
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}
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return results[lowestPenaltyIdx]
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}
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func setMasked(x, y int, val bool, mask int, set func(int, int, bool)) {
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switch mask {
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case 0:
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val = val != (((y + x) % 2) == 0)
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break
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case 1:
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val = val != ((y % 2) == 0)
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break
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case 2:
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val = val != ((x % 3) == 0)
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break
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case 3:
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val = val != (((y + x) % 3) == 0)
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break
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case 4:
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val = val != (((y/2 + x/3) % 2) == 0)
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break
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case 5:
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val = val != (((y*x)%2)+((y*x)%3) == 0)
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break
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case 6:
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val = val != ((((y*x)%2)+((y*x)%3))%2 == 0)
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break
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case 7:
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val = val != ((((y+x)%2)+((y*x)%3))%2 == 0)
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}
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set(x, y, val)
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}
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func iterateModules(occupied *qrcode) <-chan image.Point {
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result := make(chan image.Point)
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allPoints := make(chan image.Point)
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go func() {
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curX := occupied.dimension - 1
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curY := occupied.dimension - 1
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isUpward := true
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for true {
|
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if isUpward {
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allPoints <- image.Pt(curX, curY)
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allPoints <- image.Pt(curX-1, curY)
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curY--
|
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if curY < 0 {
|
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curY = 0
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curX -= 2
|
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if curX == 6 {
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curX--
|
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}
|
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if curX < 0 {
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break
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}
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isUpward = false
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}
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} else {
|
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allPoints <- image.Pt(curX, curY)
|
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allPoints <- image.Pt(curX-1, curY)
|
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curY++
|
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if curY >= occupied.dimension {
|
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curY = occupied.dimension - 1
|
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curX -= 2
|
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if curX == 6 {
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curX--
|
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}
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isUpward = true
|
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if curX < 0 {
|
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break
|
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}
|
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}
|
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}
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}
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|
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close(allPoints)
|
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}()
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go func() {
|
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for pt := range allPoints {
|
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if !occupied.Get(pt.X, pt.Y) {
|
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result <- pt
|
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}
|
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}
|
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close(result)
|
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}()
|
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return result
|
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}
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|
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func drawFinderPatterns(vi *versionInfo, set func(int, int, bool)) {
|
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dim := vi.modulWidth()
|
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drawPattern := func(xoff int, yoff int) {
|
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for x := -1; x < 8; x++ {
|
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for y := -1; y < 8; y++ {
|
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val := (x == 0 || x == 6 || y == 0 || y == 6 || (x > 1 && x < 5 && y > 1 && y < 5)) && (x <= 6 && y <= 6 && x >= 0 && y >= 0)
|
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|
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if x+xoff >= 0 && x+xoff < dim && y+yoff >= 0 && y+yoff < dim {
|
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set(x+xoff, y+yoff, val)
|
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}
|
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}
|
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}
|
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}
|
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drawPattern(0, 0)
|
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drawPattern(0, dim-7)
|
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drawPattern(dim-7, 0)
|
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}
|
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|
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func drawAlignmentPatterns(occupied *qrcode, vi *versionInfo, set func(int, int, bool)) {
|
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drawPattern := func(xoff int, yoff int) {
|
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for x := -2; x <= 2; x++ {
|
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for y := -2; y <= 2; y++ {
|
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val := x == -2 || x == 2 || y == -2 || y == 2 || (x == 0 && y == 0)
|
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set(x+xoff, y+yoff, val)
|
||||
}
|
||||
}
|
||||
}
|
||||
positions := vi.alignmentPatternPlacements()
|
||||
|
||||
for _, x := range positions {
|
||||
for _, y := range positions {
|
||||
if occupied.Get(x, y) {
|
||||
continue
|
||||
}
|
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drawPattern(x, y)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
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var formatInfos = map[ErrorCorrectionLevel]map[int][]bool{
|
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L: {
|
||||
0: []bool{true, true, true, false, true, true, true, true, true, false, false, false, true, false, false},
|
||||
1: []bool{true, true, true, false, false, true, false, true, true, true, true, false, false, true, true},
|
||||
2: []bool{true, true, true, true, true, false, true, true, false, true, false, true, false, true, false},
|
||||
3: []bool{true, true, true, true, false, false, false, true, false, false, true, true, true, false, true},
|
||||
4: []bool{true, true, false, false, true, true, false, false, false, true, false, true, true, true, true},
|
||||
5: []bool{true, true, false, false, false, true, true, false, false, false, true, true, false, false, false},
|
||||
6: []bool{true, true, false, true, true, false, false, false, true, false, false, false, false, false, true},
|
||||
7: []bool{true, true, false, true, false, false, true, false, true, true, true, false, true, true, false},
|
||||
},
|
||||
M: {
|
||||
0: []bool{true, false, true, false, true, false, false, false, false, false, true, false, false, true, false},
|
||||
1: []bool{true, false, true, false, false, false, true, false, false, true, false, false, true, false, true},
|
||||
2: []bool{true, false, true, true, true, true, false, false, true, true, true, true, true, false, false},
|
||||
3: []bool{true, false, true, true, false, true, true, false, true, false, false, true, false, true, true},
|
||||
4: []bool{true, false, false, false, true, false, true, true, true, true, true, true, false, false, true},
|
||||
5: []bool{true, false, false, false, false, false, false, true, true, false, false, true, true, true, false},
|
||||
6: []bool{true, false, false, true, true, true, true, true, false, false, true, false, true, true, true},
|
||||
7: []bool{true, false, false, true, false, true, false, true, false, true, false, false, false, false, false},
|
||||
},
|
||||
Q: {
|
||||
0: []bool{false, true, true, false, true, false, true, false, true, false, true, true, true, true, true},
|
||||
1: []bool{false, true, true, false, false, false, false, false, true, true, false, true, false, false, false},
|
||||
2: []bool{false, true, true, true, true, true, true, false, false, true, true, false, false, false, true},
|
||||
3: []bool{false, true, true, true, false, true, false, false, false, false, false, false, true, true, false},
|
||||
4: []bool{false, true, false, false, true, false, false, true, false, true, true, false, true, false, false},
|
||||
5: []bool{false, true, false, false, false, false, true, true, false, false, false, false, false, true, true},
|
||||
6: []bool{false, true, false, true, true, true, false, true, true, false, true, true, false, true, false},
|
||||
7: []bool{false, true, false, true, false, true, true, true, true, true, false, true, true, false, true},
|
||||
},
|
||||
H: {
|
||||
0: []bool{false, false, true, false, true, true, false, true, false, false, false, true, false, false, true},
|
||||
1: []bool{false, false, true, false, false, true, true, true, false, true, true, true, true, true, false},
|
||||
2: []bool{false, false, true, true, true, false, false, true, true, true, false, false, true, true, true},
|
||||
3: []bool{false, false, true, true, false, false, true, true, true, false, true, false, false, false, false},
|
||||
4: []bool{false, false, false, false, true, true, true, false, true, true, false, false, false, true, false},
|
||||
5: []bool{false, false, false, false, false, true, false, false, true, false, true, false, true, false, true},
|
||||
6: []bool{false, false, false, true, true, false, true, false, false, false, false, true, true, false, false},
|
||||
7: []bool{false, false, false, true, false, false, false, false, false, true, true, true, false, true, true},
|
||||
},
|
||||
}
|
||||
|
||||
func drawFormatInfo(vi *versionInfo, usedMask int, set func(int, int, bool)) {
|
||||
var formatInfo []bool
|
||||
|
||||
if usedMask == -1 {
|
||||
formatInfo = []bool{true, true, true, true, true, true, true, true, true, true, true, true, true, true, true} // Set all to true cause -1 --> occupied mask.
|
||||
} else {
|
||||
formatInfo = formatInfos[vi.Level][usedMask]
|
||||
}
|
||||
|
||||
if len(formatInfo) == 15 {
|
||||
dim := vi.modulWidth()
|
||||
set(0, 8, formatInfo[0])
|
||||
set(1, 8, formatInfo[1])
|
||||
set(2, 8, formatInfo[2])
|
||||
set(3, 8, formatInfo[3])
|
||||
set(4, 8, formatInfo[4])
|
||||
set(5, 8, formatInfo[5])
|
||||
set(7, 8, formatInfo[6])
|
||||
set(8, 8, formatInfo[7])
|
||||
set(8, 7, formatInfo[8])
|
||||
set(8, 5, formatInfo[9])
|
||||
set(8, 4, formatInfo[10])
|
||||
set(8, 3, formatInfo[11])
|
||||
set(8, 2, formatInfo[12])
|
||||
set(8, 1, formatInfo[13])
|
||||
set(8, 0, formatInfo[14])
|
||||
|
||||
set(8, dim-1, formatInfo[0])
|
||||
set(8, dim-2, formatInfo[1])
|
||||
set(8, dim-3, formatInfo[2])
|
||||
set(8, dim-4, formatInfo[3])
|
||||
set(8, dim-5, formatInfo[4])
|
||||
set(8, dim-6, formatInfo[5])
|
||||
set(8, dim-7, formatInfo[6])
|
||||
set(dim-8, 8, formatInfo[7])
|
||||
set(dim-7, 8, formatInfo[8])
|
||||
set(dim-6, 8, formatInfo[9])
|
||||
set(dim-5, 8, formatInfo[10])
|
||||
set(dim-4, 8, formatInfo[11])
|
||||
set(dim-3, 8, formatInfo[12])
|
||||
set(dim-2, 8, formatInfo[13])
|
||||
set(dim-1, 8, formatInfo[14])
|
||||
}
|
||||
}
|
||||
|
||||
var versionInfoBitsByVersion = map[byte][]bool{
|
||||
7: []bool{false, false, false, true, true, true, true, true, false, false, true, false, false, true, false, true, false, false},
|
||||
8: []bool{false, false, true, false, false, false, false, true, false, true, true, false, true, true, true, true, false, false},
|
||||
9: []bool{false, false, true, false, false, true, true, false, true, false, true, false, false, true, true, false, false, true},
|
||||
10: []bool{false, false, true, false, true, false, false, true, false, false, true, true, false, true, false, false, true, true},
|
||||
11: []bool{false, false, true, false, true, true, true, false, true, true, true, true, true, true, false, true, true, false},
|
||||
12: []bool{false, false, true, true, false, false, false, true, true, true, false, true, true, false, false, false, true, false},
|
||||
13: []bool{false, false, true, true, false, true, true, false, false, false, false, true, false, false, false, true, true, true},
|
||||
14: []bool{false, false, true, true, true, false, false, true, true, false, false, false, false, false, true, true, false, true},
|
||||
15: []bool{false, false, true, true, true, true, true, false, false, true, false, false, true, false, true, false, false, false},
|
||||
16: []bool{false, true, false, false, false, false, true, false, true, true, false, true, true, true, true, false, false, false},
|
||||
17: []bool{false, true, false, false, false, true, false, true, false, false, false, true, false, true, true, true, false, true},
|
||||
18: []bool{false, true, false, false, true, false, true, false, true, false, false, false, false, true, false, true, true, true},
|
||||
19: []bool{false, true, false, false, true, true, false, true, false, true, false, false, true, true, false, false, true, false},
|
||||
20: []bool{false, true, false, true, false, false, true, false, false, true, true, false, true, false, false, true, true, false},
|
||||
21: []bool{false, true, false, true, false, true, false, true, true, false, true, false, false, false, false, false, true, true},
|
||||
22: []bool{false, true, false, true, true, false, true, false, false, false, true, true, false, false, true, false, false, true},
|
||||
23: []bool{false, true, false, true, true, true, false, true, true, true, true, true, true, false, true, true, false, false},
|
||||
24: []bool{false, true, true, false, false, false, true, true, true, false, true, true, false, false, false, true, false, false},
|
||||
25: []bool{false, true, true, false, false, true, false, false, false, true, true, true, true, false, false, false, false, true},
|
||||
26: []bool{false, true, true, false, true, false, true, true, true, true, true, false, true, false, true, false, true, true},
|
||||
27: []bool{false, true, true, false, true, true, false, false, false, false, true, false, false, false, true, true, true, false},
|
||||
28: []bool{false, true, true, true, false, false, true, true, false, false, false, false, false, true, true, false, true, false},
|
||||
29: []bool{false, true, true, true, false, true, false, false, true, true, false, false, true, true, true, true, true, true},
|
||||
30: []bool{false, true, true, true, true, false, true, true, false, true, false, true, true, true, false, true, false, true},
|
||||
31: []bool{false, true, true, true, true, true, false, false, true, false, false, true, false, true, false, false, false, false},
|
||||
32: []bool{true, false, false, false, false, false, true, false, false, true, true, true, false, true, false, true, false, true},
|
||||
33: []bool{true, false, false, false, false, true, false, true, true, false, true, true, true, true, false, false, false, false},
|
||||
34: []bool{true, false, false, false, true, false, true, false, false, false, true, false, true, true, true, false, true, false},
|
||||
35: []bool{true, false, false, false, true, true, false, true, true, true, true, false, false, true, true, true, true, true},
|
||||
36: []bool{true, false, false, true, false, false, true, false, true, true, false, false, false, false, true, false, true, true},
|
||||
37: []bool{true, false, false, true, false, true, false, true, false, false, false, false, true, false, true, true, true, false},
|
||||
38: []bool{true, false, false, true, true, false, true, false, true, false, false, true, true, false, false, true, false, false},
|
||||
39: []bool{true, false, false, true, true, true, false, true, false, true, false, true, false, false, false, false, false, true},
|
||||
40: []bool{true, false, true, false, false, false, true, true, false, false, false, true, true, false, true, false, false, true},
|
||||
}
|
||||
|
||||
func drawVersionInfo(vi *versionInfo, set func(int, int, bool)) {
|
||||
versionInfoBits, ok := versionInfoBitsByVersion[vi.Version]
|
||||
|
||||
if ok && len(versionInfoBits) > 0 {
|
||||
for i := 0; i < len(versionInfoBits); i++ {
|
||||
x := (vi.modulWidth() - 11) + i%3
|
||||
y := i / 3
|
||||
set(x, y, versionInfoBits[len(versionInfoBits)-i-1])
|
||||
set(y, x, versionInfoBits[len(versionInfoBits)-i-1])
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
func addPaddingAndTerminator(bl *utils.BitList, vi *versionInfo) {
|
||||
for i := 0; i < 4 && bl.Len() < vi.totalDataBytes()*8; i++ {
|
||||
bl.AddBit(false)
|
||||
}
|
||||
|
||||
for bl.Len()%8 != 0 {
|
||||
bl.AddBit(false)
|
||||
}
|
||||
|
||||
for i := 0; bl.Len() < vi.totalDataBytes()*8; i++ {
|
||||
if i%2 == 0 {
|
||||
bl.AddByte(236)
|
||||
} else {
|
||||
bl.AddByte(17)
|
||||
}
|
||||
}
|
||||
}
|
||||
29
vendor/github.com/boombuler/barcode/qr/errorcorrection.go
generated
vendored
Normal file
29
vendor/github.com/boombuler/barcode/qr/errorcorrection.go
generated
vendored
Normal file
|
|
@ -0,0 +1,29 @@
|
|||
package qr
|
||||
|
||||
import (
|
||||
"github.com/boombuler/barcode/utils"
|
||||
)
|
||||
|
||||
type errorCorrection struct {
|
||||
rs *utils.ReedSolomonEncoder
|
||||
}
|
||||
|
||||
var ec = newErrorCorrection()
|
||||
|
||||
func newErrorCorrection() *errorCorrection {
|
||||
fld := utils.NewGaloisField(285, 256, 0)
|
||||
return &errorCorrection{utils.NewReedSolomonEncoder(fld)}
|
||||
}
|
||||
|
||||
func (ec *errorCorrection) calcECC(data []byte, eccCount byte) []byte {
|
||||
dataInts := make([]int, len(data))
|
||||
for i := 0; i < len(data); i++ {
|
||||
dataInts[i] = int(data[i])
|
||||
}
|
||||
res := ec.rs.Encode(dataInts, int(eccCount))
|
||||
result := make([]byte, len(res))
|
||||
for i := 0; i < len(res); i++ {
|
||||
result[i] = byte(res[i])
|
||||
}
|
||||
return result
|
||||
}
|
||||
56
vendor/github.com/boombuler/barcode/qr/numeric.go
generated
vendored
Normal file
56
vendor/github.com/boombuler/barcode/qr/numeric.go
generated
vendored
Normal file
|
|
@ -0,0 +1,56 @@
|
|||
package qr
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"fmt"
|
||||
"strconv"
|
||||
|
||||
"github.com/boombuler/barcode/utils"
|
||||
)
|
||||
|
||||
func encodeNumeric(content string, ecl ErrorCorrectionLevel) (*utils.BitList, *versionInfo, error) {
|
||||
contentBitCount := (len(content) / 3) * 10
|
||||
switch len(content) % 3 {
|
||||
case 1:
|
||||
contentBitCount += 4
|
||||
case 2:
|
||||
contentBitCount += 7
|
||||
}
|
||||
vi := findSmallestVersionInfo(ecl, numericMode, contentBitCount)
|
||||
if vi == nil {
|
||||
return nil, nil, errors.New("To much data to encode")
|
||||
}
|
||||
res := new(utils.BitList)
|
||||
res.AddBits(int(numericMode), 4)
|
||||
res.AddBits(len(content), vi.charCountBits(numericMode))
|
||||
|
||||
for pos := 0; pos < len(content); pos += 3 {
|
||||
var curStr string
|
||||
if pos+3 <= len(content) {
|
||||
curStr = content[pos : pos+3]
|
||||
} else {
|
||||
curStr = content[pos:]
|
||||
}
|
||||
|
||||
i, err := strconv.Atoi(curStr)
|
||||
if err != nil || i < 0 {
|
||||
return nil, nil, fmt.Errorf("\"%s\" can not be encoded as %s", content, Numeric)
|
||||
}
|
||||
var bitCnt byte
|
||||
switch len(curStr) % 3 {
|
||||
case 0:
|
||||
bitCnt = 10
|
||||
case 1:
|
||||
bitCnt = 4
|
||||
break
|
||||
case 2:
|
||||
bitCnt = 7
|
||||
break
|
||||
}
|
||||
|
||||
res.AddBits(i, bitCnt)
|
||||
}
|
||||
|
||||
addPaddingAndTerminator(res, vi)
|
||||
return res, vi, nil
|
||||
}
|
||||
170
vendor/github.com/boombuler/barcode/qr/qrcode.go
generated
vendored
Normal file
170
vendor/github.com/boombuler/barcode/qr/qrcode.go
generated
vendored
Normal file
|
|
@ -0,0 +1,170 @@
|
|||
package qr
|
||||
|
||||
import (
|
||||
"image"
|
||||
"image/color"
|
||||
"math"
|
||||
|
||||
"github.com/boombuler/barcode"
|
||||
"github.com/boombuler/barcode/utils"
|
||||
)
|
||||
|
||||
type qrcode struct {
|
||||
dimension int
|
||||
data *utils.BitList
|
||||
content string
|
||||
}
|
||||
|
||||
func (qr *qrcode) Content() string {
|
||||
return qr.content
|
||||
}
|
||||
|
||||
func (qr *qrcode) Metadata() barcode.Metadata {
|
||||
return barcode.Metadata{"QR Code", 2}
|
||||
}
|
||||
|
||||
func (qr *qrcode) ColorModel() color.Model {
|
||||
return color.Gray16Model
|
||||
}
|
||||
|
||||
func (qr *qrcode) Bounds() image.Rectangle {
|
||||
return image.Rect(0, 0, qr.dimension, qr.dimension)
|
||||
}
|
||||
|
||||
func (qr *qrcode) At(x, y int) color.Color {
|
||||
if qr.Get(x, y) {
|
||||
return color.Black
|
||||
}
|
||||
return color.White
|
||||
}
|
||||
|
||||
func (qr *qrcode) Get(x, y int) bool {
|
||||
return qr.data.GetBit(x*qr.dimension + y)
|
||||
}
|
||||
|
||||
func (qr *qrcode) Set(x, y int, val bool) {
|
||||
qr.data.SetBit(x*qr.dimension+y, val)
|
||||
}
|
||||
|
||||
func (qr *qrcode) CheckSum() int {
|
||||
return 0
|
||||
}
|
||||
|
||||
func (qr *qrcode) calcPenalty() uint {
|
||||
return qr.calcPenaltyRule1() + qr.calcPenaltyRule2() + qr.calcPenaltyRule3() + qr.calcPenaltyRule4()
|
||||
}
|
||||
|
||||
func (qr *qrcode) calcPenaltyRule1() uint {
|
||||
var result uint
|
||||
for x := 0; x < qr.dimension; x++ {
|
||||
checkForX := false
|
||||
var cntX uint
|
||||
checkForY := false
|
||||
var cntY uint
|
||||
|
||||
for y := 0; y < qr.dimension; y++ {
|
||||
if qr.Get(x, y) == checkForX {
|
||||
cntX++
|
||||
} else {
|
||||
checkForX = !checkForX
|
||||
if cntX >= 5 {
|
||||
result += cntX - 2
|
||||
}
|
||||
cntX = 1
|
||||
}
|
||||
|
||||
if qr.Get(y, x) == checkForY {
|
||||
cntY++
|
||||
} else {
|
||||
checkForY = !checkForY
|
||||
if cntY >= 5 {
|
||||
result += cntY - 2
|
||||
}
|
||||
cntY = 1
|
||||
}
|
||||
}
|
||||
|
||||
if cntX >= 5 {
|
||||
result += cntX - 2
|
||||
}
|
||||
if cntY >= 5 {
|
||||
result += cntY - 2
|
||||
}
|
||||
}
|
||||
|
||||
return result
|
||||
}
|
||||
|
||||
func (qr *qrcode) calcPenaltyRule2() uint {
|
||||
var result uint
|
||||
for x := 0; x < qr.dimension-1; x++ {
|
||||
for y := 0; y < qr.dimension-1; y++ {
|
||||
check := qr.Get(x, y)
|
||||
if qr.Get(x, y+1) == check && qr.Get(x+1, y) == check && qr.Get(x+1, y+1) == check {
|
||||
result += 3
|
||||
}
|
||||
}
|
||||
}
|
||||
return result
|
||||
}
|
||||
|
||||
func (qr *qrcode) calcPenaltyRule3() uint {
|
||||
pattern1 := []bool{true, false, true, true, true, false, true, false, false, false, false}
|
||||
pattern2 := []bool{false, false, false, false, true, false, true, true, true, false, true}
|
||||
|
||||
var result uint
|
||||
for x := 0; x <= qr.dimension-len(pattern1); x++ {
|
||||
for y := 0; y < qr.dimension; y++ {
|
||||
pattern1XFound := true
|
||||
pattern2XFound := true
|
||||
pattern1YFound := true
|
||||
pattern2YFound := true
|
||||
|
||||
for i := 0; i < len(pattern1); i++ {
|
||||
iv := qr.Get(x+i, y)
|
||||
if iv != pattern1[i] {
|
||||
pattern1XFound = false
|
||||
}
|
||||
if iv != pattern2[i] {
|
||||
pattern2XFound = false
|
||||
}
|
||||
iv = qr.Get(y, x+i)
|
||||
if iv != pattern1[i] {
|
||||
pattern1YFound = false
|
||||
}
|
||||
if iv != pattern2[i] {
|
||||
pattern2YFound = false
|
||||
}
|
||||
}
|
||||
if pattern1XFound || pattern2XFound {
|
||||
result += 40
|
||||
}
|
||||
if pattern1YFound || pattern2YFound {
|
||||
result += 40
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return result
|
||||
}
|
||||
|
||||
func (qr *qrcode) calcPenaltyRule4() uint {
|
||||
totalNum := qr.data.Len()
|
||||
trueCnt := 0
|
||||
for i := 0; i < totalNum; i++ {
|
||||
if qr.data.GetBit(i) {
|
||||
trueCnt++
|
||||
}
|
||||
}
|
||||
percDark := float64(trueCnt) * 100 / float64(totalNum)
|
||||
floor := math.Abs(math.Floor(percDark/5) - 10)
|
||||
ceil := math.Abs(math.Ceil(percDark/5) - 10)
|
||||
return uint(math.Min(floor, ceil) * 10)
|
||||
}
|
||||
|
||||
func newBarcode(dim int) *qrcode {
|
||||
res := new(qrcode)
|
||||
res.dimension = dim
|
||||
res.data = utils.NewBitList(dim * dim)
|
||||
return res
|
||||
}
|
||||
27
vendor/github.com/boombuler/barcode/qr/unicode.go
generated
vendored
Normal file
27
vendor/github.com/boombuler/barcode/qr/unicode.go
generated
vendored
Normal file
|
|
@ -0,0 +1,27 @@
|
|||
package qr
|
||||
|
||||
import (
|
||||
"errors"
|
||||
|
||||
"github.com/boombuler/barcode/utils"
|
||||
)
|
||||
|
||||
func encodeUnicode(content string, ecl ErrorCorrectionLevel) (*utils.BitList, *versionInfo, error) {
|
||||
data := []byte(content)
|
||||
|
||||
vi := findSmallestVersionInfo(ecl, byteMode, len(data)*8)
|
||||
if vi == nil {
|
||||
return nil, nil, errors.New("To much data to encode")
|
||||
}
|
||||
|
||||
// It's not correct to add the unicode bytes to the result directly but most readers can't handle the
|
||||
// required ECI header...
|
||||
res := new(utils.BitList)
|
||||
res.AddBits(int(byteMode), 4)
|
||||
res.AddBits(len(content), vi.charCountBits(byteMode))
|
||||
for _, b := range data {
|
||||
res.AddByte(b)
|
||||
}
|
||||
addPaddingAndTerminator(res, vi)
|
||||
return res, vi, nil
|
||||
}
|
||||
310
vendor/github.com/boombuler/barcode/qr/versioninfo.go
generated
vendored
Normal file
310
vendor/github.com/boombuler/barcode/qr/versioninfo.go
generated
vendored
Normal file
|
|
@ -0,0 +1,310 @@
|
|||
package qr
|
||||
|
||||
import "math"
|
||||
|
||||
// ErrorCorrectionLevel indicates the amount of "backup data" stored in the QR code
|
||||
type ErrorCorrectionLevel byte
|
||||
|
||||
const (
|
||||
// L recovers 7% of data
|
||||
L ErrorCorrectionLevel = iota
|
||||
// M recovers 15% of data
|
||||
M
|
||||
// Q recovers 25% of data
|
||||
Q
|
||||
// H recovers 30% of data
|
||||
H
|
||||
)
|
||||
|
||||
func (ecl ErrorCorrectionLevel) String() string {
|
||||
switch ecl {
|
||||
case L:
|
||||
return "L"
|
||||
case M:
|
||||
return "M"
|
||||
case Q:
|
||||
return "Q"
|
||||
case H:
|
||||
return "H"
|
||||
}
|
||||
return "unknown"
|
||||
}
|
||||
|
||||
type encodingMode byte
|
||||
|
||||
const (
|
||||
numericMode encodingMode = 1
|
||||
alphaNumericMode encodingMode = 2
|
||||
byteMode encodingMode = 4
|
||||
kanjiMode encodingMode = 8
|
||||
)
|
||||
|
||||
type versionInfo struct {
|
||||
Version byte
|
||||
Level ErrorCorrectionLevel
|
||||
ErrorCorrectionCodewordsPerBlock byte
|
||||
NumberOfBlocksInGroup1 byte
|
||||
DataCodeWordsPerBlockInGroup1 byte
|
||||
NumberOfBlocksInGroup2 byte
|
||||
DataCodeWordsPerBlockInGroup2 byte
|
||||
}
|
||||
|
||||
var versionInfos = []*versionInfo{
|
||||
&versionInfo{1, L, 7, 1, 19, 0, 0},
|
||||
&versionInfo{1, M, 10, 1, 16, 0, 0},
|
||||
&versionInfo{1, Q, 13, 1, 13, 0, 0},
|
||||
&versionInfo{1, H, 17, 1, 9, 0, 0},
|
||||
&versionInfo{2, L, 10, 1, 34, 0, 0},
|
||||
&versionInfo{2, M, 16, 1, 28, 0, 0},
|
||||
&versionInfo{2, Q, 22, 1, 22, 0, 0},
|
||||
&versionInfo{2, H, 28, 1, 16, 0, 0},
|
||||
&versionInfo{3, L, 15, 1, 55, 0, 0},
|
||||
&versionInfo{3, M, 26, 1, 44, 0, 0},
|
||||
&versionInfo{3, Q, 18, 2, 17, 0, 0},
|
||||
&versionInfo{3, H, 22, 2, 13, 0, 0},
|
||||
&versionInfo{4, L, 20, 1, 80, 0, 0},
|
||||
&versionInfo{4, M, 18, 2, 32, 0, 0},
|
||||
&versionInfo{4, Q, 26, 2, 24, 0, 0},
|
||||
&versionInfo{4, H, 16, 4, 9, 0, 0},
|
||||
&versionInfo{5, L, 26, 1, 108, 0, 0},
|
||||
&versionInfo{5, M, 24, 2, 43, 0, 0},
|
||||
&versionInfo{5, Q, 18, 2, 15, 2, 16},
|
||||
&versionInfo{5, H, 22, 2, 11, 2, 12},
|
||||
&versionInfo{6, L, 18, 2, 68, 0, 0},
|
||||
&versionInfo{6, M, 16, 4, 27, 0, 0},
|
||||
&versionInfo{6, Q, 24, 4, 19, 0, 0},
|
||||
&versionInfo{6, H, 28, 4, 15, 0, 0},
|
||||
&versionInfo{7, L, 20, 2, 78, 0, 0},
|
||||
&versionInfo{7, M, 18, 4, 31, 0, 0},
|
||||
&versionInfo{7, Q, 18, 2, 14, 4, 15},
|
||||
&versionInfo{7, H, 26, 4, 13, 1, 14},
|
||||
&versionInfo{8, L, 24, 2, 97, 0, 0},
|
||||
&versionInfo{8, M, 22, 2, 38, 2, 39},
|
||||
&versionInfo{8, Q, 22, 4, 18, 2, 19},
|
||||
&versionInfo{8, H, 26, 4, 14, 2, 15},
|
||||
&versionInfo{9, L, 30, 2, 116, 0, 0},
|
||||
&versionInfo{9, M, 22, 3, 36, 2, 37},
|
||||
&versionInfo{9, Q, 20, 4, 16, 4, 17},
|
||||
&versionInfo{9, H, 24, 4, 12, 4, 13},
|
||||
&versionInfo{10, L, 18, 2, 68, 2, 69},
|
||||
&versionInfo{10, M, 26, 4, 43, 1, 44},
|
||||
&versionInfo{10, Q, 24, 6, 19, 2, 20},
|
||||
&versionInfo{10, H, 28, 6, 15, 2, 16},
|
||||
&versionInfo{11, L, 20, 4, 81, 0, 0},
|
||||
&versionInfo{11, M, 30, 1, 50, 4, 51},
|
||||
&versionInfo{11, Q, 28, 4, 22, 4, 23},
|
||||
&versionInfo{11, H, 24, 3, 12, 8, 13},
|
||||
&versionInfo{12, L, 24, 2, 92, 2, 93},
|
||||
&versionInfo{12, M, 22, 6, 36, 2, 37},
|
||||
&versionInfo{12, Q, 26, 4, 20, 6, 21},
|
||||
&versionInfo{12, H, 28, 7, 14, 4, 15},
|
||||
&versionInfo{13, L, 26, 4, 107, 0, 0},
|
||||
&versionInfo{13, M, 22, 8, 37, 1, 38},
|
||||
&versionInfo{13, Q, 24, 8, 20, 4, 21},
|
||||
&versionInfo{13, H, 22, 12, 11, 4, 12},
|
||||
&versionInfo{14, L, 30, 3, 115, 1, 116},
|
||||
&versionInfo{14, M, 24, 4, 40, 5, 41},
|
||||
&versionInfo{14, Q, 20, 11, 16, 5, 17},
|
||||
&versionInfo{14, H, 24, 11, 12, 5, 13},
|
||||
&versionInfo{15, L, 22, 5, 87, 1, 88},
|
||||
&versionInfo{15, M, 24, 5, 41, 5, 42},
|
||||
&versionInfo{15, Q, 30, 5, 24, 7, 25},
|
||||
&versionInfo{15, H, 24, 11, 12, 7, 13},
|
||||
&versionInfo{16, L, 24, 5, 98, 1, 99},
|
||||
&versionInfo{16, M, 28, 7, 45, 3, 46},
|
||||
&versionInfo{16, Q, 24, 15, 19, 2, 20},
|
||||
&versionInfo{16, H, 30, 3, 15, 13, 16},
|
||||
&versionInfo{17, L, 28, 1, 107, 5, 108},
|
||||
&versionInfo{17, M, 28, 10, 46, 1, 47},
|
||||
&versionInfo{17, Q, 28, 1, 22, 15, 23},
|
||||
&versionInfo{17, H, 28, 2, 14, 17, 15},
|
||||
&versionInfo{18, L, 30, 5, 120, 1, 121},
|
||||
&versionInfo{18, M, 26, 9, 43, 4, 44},
|
||||
&versionInfo{18, Q, 28, 17, 22, 1, 23},
|
||||
&versionInfo{18, H, 28, 2, 14, 19, 15},
|
||||
&versionInfo{19, L, 28, 3, 113, 4, 114},
|
||||
&versionInfo{19, M, 26, 3, 44, 11, 45},
|
||||
&versionInfo{19, Q, 26, 17, 21, 4, 22},
|
||||
&versionInfo{19, H, 26, 9, 13, 16, 14},
|
||||
&versionInfo{20, L, 28, 3, 107, 5, 108},
|
||||
&versionInfo{20, M, 26, 3, 41, 13, 42},
|
||||
&versionInfo{20, Q, 30, 15, 24, 5, 25},
|
||||
&versionInfo{20, H, 28, 15, 15, 10, 16},
|
||||
&versionInfo{21, L, 28, 4, 116, 4, 117},
|
||||
&versionInfo{21, M, 26, 17, 42, 0, 0},
|
||||
&versionInfo{21, Q, 28, 17, 22, 6, 23},
|
||||
&versionInfo{21, H, 30, 19, 16, 6, 17},
|
||||
&versionInfo{22, L, 28, 2, 111, 7, 112},
|
||||
&versionInfo{22, M, 28, 17, 46, 0, 0},
|
||||
&versionInfo{22, Q, 30, 7, 24, 16, 25},
|
||||
&versionInfo{22, H, 24, 34, 13, 0, 0},
|
||||
&versionInfo{23, L, 30, 4, 121, 5, 122},
|
||||
&versionInfo{23, M, 28, 4, 47, 14, 48},
|
||||
&versionInfo{23, Q, 30, 11, 24, 14, 25},
|
||||
&versionInfo{23, H, 30, 16, 15, 14, 16},
|
||||
&versionInfo{24, L, 30, 6, 117, 4, 118},
|
||||
&versionInfo{24, M, 28, 6, 45, 14, 46},
|
||||
&versionInfo{24, Q, 30, 11, 24, 16, 25},
|
||||
&versionInfo{24, H, 30, 30, 16, 2, 17},
|
||||
&versionInfo{25, L, 26, 8, 106, 4, 107},
|
||||
&versionInfo{25, M, 28, 8, 47, 13, 48},
|
||||
&versionInfo{25, Q, 30, 7, 24, 22, 25},
|
||||
&versionInfo{25, H, 30, 22, 15, 13, 16},
|
||||
&versionInfo{26, L, 28, 10, 114, 2, 115},
|
||||
&versionInfo{26, M, 28, 19, 46, 4, 47},
|
||||
&versionInfo{26, Q, 28, 28, 22, 6, 23},
|
||||
&versionInfo{26, H, 30, 33, 16, 4, 17},
|
||||
&versionInfo{27, L, 30, 8, 122, 4, 123},
|
||||
&versionInfo{27, M, 28, 22, 45, 3, 46},
|
||||
&versionInfo{27, Q, 30, 8, 23, 26, 24},
|
||||
&versionInfo{27, H, 30, 12, 15, 28, 16},
|
||||
&versionInfo{28, L, 30, 3, 117, 10, 118},
|
||||
&versionInfo{28, M, 28, 3, 45, 23, 46},
|
||||
&versionInfo{28, Q, 30, 4, 24, 31, 25},
|
||||
&versionInfo{28, H, 30, 11, 15, 31, 16},
|
||||
&versionInfo{29, L, 30, 7, 116, 7, 117},
|
||||
&versionInfo{29, M, 28, 21, 45, 7, 46},
|
||||
&versionInfo{29, Q, 30, 1, 23, 37, 24},
|
||||
&versionInfo{29, H, 30, 19, 15, 26, 16},
|
||||
&versionInfo{30, L, 30, 5, 115, 10, 116},
|
||||
&versionInfo{30, M, 28, 19, 47, 10, 48},
|
||||
&versionInfo{30, Q, 30, 15, 24, 25, 25},
|
||||
&versionInfo{30, H, 30, 23, 15, 25, 16},
|
||||
&versionInfo{31, L, 30, 13, 115, 3, 116},
|
||||
&versionInfo{31, M, 28, 2, 46, 29, 47},
|
||||
&versionInfo{31, Q, 30, 42, 24, 1, 25},
|
||||
&versionInfo{31, H, 30, 23, 15, 28, 16},
|
||||
&versionInfo{32, L, 30, 17, 115, 0, 0},
|
||||
&versionInfo{32, M, 28, 10, 46, 23, 47},
|
||||
&versionInfo{32, Q, 30, 10, 24, 35, 25},
|
||||
&versionInfo{32, H, 30, 19, 15, 35, 16},
|
||||
&versionInfo{33, L, 30, 17, 115, 1, 116},
|
||||
&versionInfo{33, M, 28, 14, 46, 21, 47},
|
||||
&versionInfo{33, Q, 30, 29, 24, 19, 25},
|
||||
&versionInfo{33, H, 30, 11, 15, 46, 16},
|
||||
&versionInfo{34, L, 30, 13, 115, 6, 116},
|
||||
&versionInfo{34, M, 28, 14, 46, 23, 47},
|
||||
&versionInfo{34, Q, 30, 44, 24, 7, 25},
|
||||
&versionInfo{34, H, 30, 59, 16, 1, 17},
|
||||
&versionInfo{35, L, 30, 12, 121, 7, 122},
|
||||
&versionInfo{35, M, 28, 12, 47, 26, 48},
|
||||
&versionInfo{35, Q, 30, 39, 24, 14, 25},
|
||||
&versionInfo{35, H, 30, 22, 15, 41, 16},
|
||||
&versionInfo{36, L, 30, 6, 121, 14, 122},
|
||||
&versionInfo{36, M, 28, 6, 47, 34, 48},
|
||||
&versionInfo{36, Q, 30, 46, 24, 10, 25},
|
||||
&versionInfo{36, H, 30, 2, 15, 64, 16},
|
||||
&versionInfo{37, L, 30, 17, 122, 4, 123},
|
||||
&versionInfo{37, M, 28, 29, 46, 14, 47},
|
||||
&versionInfo{37, Q, 30, 49, 24, 10, 25},
|
||||
&versionInfo{37, H, 30, 24, 15, 46, 16},
|
||||
&versionInfo{38, L, 30, 4, 122, 18, 123},
|
||||
&versionInfo{38, M, 28, 13, 46, 32, 47},
|
||||
&versionInfo{38, Q, 30, 48, 24, 14, 25},
|
||||
&versionInfo{38, H, 30, 42, 15, 32, 16},
|
||||
&versionInfo{39, L, 30, 20, 117, 4, 118},
|
||||
&versionInfo{39, M, 28, 40, 47, 7, 48},
|
||||
&versionInfo{39, Q, 30, 43, 24, 22, 25},
|
||||
&versionInfo{39, H, 30, 10, 15, 67, 16},
|
||||
&versionInfo{40, L, 30, 19, 118, 6, 119},
|
||||
&versionInfo{40, M, 28, 18, 47, 31, 48},
|
||||
&versionInfo{40, Q, 30, 34, 24, 34, 25},
|
||||
&versionInfo{40, H, 30, 20, 15, 61, 16},
|
||||
}
|
||||
|
||||
func (vi *versionInfo) totalDataBytes() int {
|
||||
g1Data := int(vi.NumberOfBlocksInGroup1) * int(vi.DataCodeWordsPerBlockInGroup1)
|
||||
g2Data := int(vi.NumberOfBlocksInGroup2) * int(vi.DataCodeWordsPerBlockInGroup2)
|
||||
return (g1Data + g2Data)
|
||||
}
|
||||
|
||||
func (vi *versionInfo) charCountBits(m encodingMode) byte {
|
||||
switch m {
|
||||
case numericMode:
|
||||
if vi.Version < 10 {
|
||||
return 10
|
||||
} else if vi.Version < 27 {
|
||||
return 12
|
||||
}
|
||||
return 14
|
||||
|
||||
case alphaNumericMode:
|
||||
if vi.Version < 10 {
|
||||
return 9
|
||||
} else if vi.Version < 27 {
|
||||
return 11
|
||||
}
|
||||
return 13
|
||||
|
||||
case byteMode:
|
||||
if vi.Version < 10 {
|
||||
return 8
|
||||
}
|
||||
return 16
|
||||
|
||||
case kanjiMode:
|
||||
if vi.Version < 10 {
|
||||
return 8
|
||||
} else if vi.Version < 27 {
|
||||
return 10
|
||||
}
|
||||
return 12
|
||||
default:
|
||||
return 0
|
||||
}
|
||||
}
|
||||
|
||||
func (vi *versionInfo) modulWidth() int {
|
||||
return ((int(vi.Version) - 1) * 4) + 21
|
||||
}
|
||||
|
||||
func (vi *versionInfo) alignmentPatternPlacements() []int {
|
||||
if vi.Version == 1 {
|
||||
return make([]int, 0)
|
||||
}
|
||||
|
||||
first := 6
|
||||
last := vi.modulWidth() - 7
|
||||
space := float64(last - first)
|
||||
count := int(math.Ceil(space/28)) + 1
|
||||
|
||||
result := make([]int, count)
|
||||
result[0] = first
|
||||
result[len(result)-1] = last
|
||||
if count > 2 {
|
||||
step := int(math.Ceil(float64(last-first) / float64(count-1)))
|
||||
if step%2 == 1 {
|
||||
frac := float64(last-first) / float64(count-1)
|
||||
_, x := math.Modf(frac)
|
||||
if x >= 0.5 {
|
||||
frac = math.Ceil(frac)
|
||||
} else {
|
||||
frac = math.Floor(frac)
|
||||
}
|
||||
|
||||
if int(frac)%2 == 0 {
|
||||
step--
|
||||
} else {
|
||||
step++
|
||||
}
|
||||
}
|
||||
|
||||
for i := 1; i <= count-2; i++ {
|
||||
result[i] = last - (step * (count - 1 - i))
|
||||
}
|
||||
}
|
||||
|
||||
return result
|
||||
}
|
||||
|
||||
func findSmallestVersionInfo(ecl ErrorCorrectionLevel, mode encodingMode, dataBits int) *versionInfo {
|
||||
dataBits = dataBits + 4 // mode indicator
|
||||
for _, vi := range versionInfos {
|
||||
if vi.Level == ecl {
|
||||
if (vi.totalDataBytes() * 8) >= (dataBits + int(vi.charCountBits(mode))) {
|
||||
return vi
|
||||
}
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue