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authorWim <wim@42.be>2022-01-31 00:27:37 +0100
committerWim <wim@42.be>2022-03-20 14:57:48 +0100
commite3cafeaf9292f67459ff1d186f68283bfaedf2ae (patch)
treeb69c39620aa91dba695b3b935c6651c0fb37ce75 /vendor/github.com/skip2
parente7b193788a56ee7cdb02a87a9db0ad6724ef66d5 (diff)
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Add dependencies/vendor (whatsapp)
Diffstat (limited to 'vendor/github.com/skip2')
-rw-r--r--vendor/github.com/skip2/go-qrcode/.gitignore4
-rw-r--r--vendor/github.com/skip2/go-qrcode/.travis.yml8
-rw-r--r--vendor/github.com/skip2/go-qrcode/LICENSE19
-rw-r--r--vendor/github.com/skip2/go-qrcode/README.md86
-rw-r--r--vendor/github.com/skip2/go-qrcode/bitset/bitset.go273
-rw-r--r--vendor/github.com/skip2/go-qrcode/encoder.go486
-rw-r--r--vendor/github.com/skip2/go-qrcode/qrcode.go608
-rw-r--r--vendor/github.com/skip2/go-qrcode/reedsolomon/gf2_8.go387
-rw-r--r--vendor/github.com/skip2/go-qrcode/reedsolomon/gf_poly.go216
-rw-r--r--vendor/github.com/skip2/go-qrcode/reedsolomon/reed_solomon.go73
-rw-r--r--vendor/github.com/skip2/go-qrcode/regular_symbol.go315
-rw-r--r--vendor/github.com/skip2/go-qrcode/symbol.go309
-rw-r--r--vendor/github.com/skip2/go-qrcode/version.go3050
13 files changed, 0 insertions, 5834 deletions
diff --git a/vendor/github.com/skip2/go-qrcode/.gitignore b/vendor/github.com/skip2/go-qrcode/.gitignore
deleted file mode 100644
index bc1be2bb..00000000
--- a/vendor/github.com/skip2/go-qrcode/.gitignore
+++ /dev/null
@@ -1,4 +0,0 @@
-*.sw*
-*.png
-*.directory
-qrcode/qrcode
diff --git a/vendor/github.com/skip2/go-qrcode/.travis.yml b/vendor/github.com/skip2/go-qrcode/.travis.yml
deleted file mode 100644
index 7ced8fb1..00000000
--- a/vendor/github.com/skip2/go-qrcode/.travis.yml
+++ /dev/null
@@ -1,8 +0,0 @@
-language: go
-
-go:
- - 1.7
-
-script:
- - go test -v ./...
-
diff --git a/vendor/github.com/skip2/go-qrcode/LICENSE b/vendor/github.com/skip2/go-qrcode/LICENSE
deleted file mode 100644
index 342c5e5a..00000000
--- a/vendor/github.com/skip2/go-qrcode/LICENSE
+++ /dev/null
@@ -1,19 +0,0 @@
-Copyright (c) 2014 Tom Harwood
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
diff --git a/vendor/github.com/skip2/go-qrcode/README.md b/vendor/github.com/skip2/go-qrcode/README.md
deleted file mode 100644
index 0a800b72..00000000
--- a/vendor/github.com/skip2/go-qrcode/README.md
+++ /dev/null
@@ -1,86 +0,0 @@
-# go-qrcode #
-
-<img src='https://skip.org/img/nyancat-youtube-qr.png' align='right'>
-
-Package qrcode implements a QR Code encoder. [![Build Status](https://travis-ci.org/skip2/go-qrcode.svg?branch=master)](https://travis-ci.org/skip2/go-qrcode)
-
-A QR Code is a matrix (two-dimensional) barcode. Arbitrary content may be encoded, with URLs being a popular choice :)
-
-Each QR Code contains error recovery information to aid reading damaged or obscured codes. There are four levels of error recovery: Low, medium, high and highest. QR Codes with a higher recovery level are more robust to damage, at the cost of being physically larger.
-
-## Install
-
- go get -u github.com/skip2/go-qrcode/...
-
-A command-line tool `qrcode` will be built into `$GOPATH/bin/`.
-
-## Usage
-
- import qrcode "github.com/skip2/go-qrcode"
-
-- **Create a 256x256 PNG image:**
-
- var png []byte
- png, err := qrcode.Encode("https://example.org", qrcode.Medium, 256)
-
-- **Create a 256x256 PNG image and write to a file:**
-
- err := qrcode.WriteFile("https://example.org", qrcode.Medium, 256, "qr.png")
-
-- **Create a 256x256 PNG image with custom colors and write to file:**
-
- err := qrcode.WriteColorFile("https://example.org", qrcode.Medium, 256, color.Black, color.White, "qr.png")
-
-All examples use the qrcode.Medium error Recovery Level and create a fixed 256x256px size QR Code. The last function creates a white on black instead of black on white QR Code.
-
-## Documentation
-
-[![godoc](https://godoc.org/github.com/skip2/go-qrcode?status.png)](https://godoc.org/github.com/skip2/go-qrcode)
-
-## Demoapp
-
-[http://go-qrcode.appspot.com](http://go-qrcode.appspot.com)
-
-## CLI
-
-A command-line tool `qrcode` will be built into `$GOPATH/bin/`.
-
-```
-qrcode -- QR Code encoder in Go
-https://github.com/skip2/go-qrcode
-
-Flags:
- -d disable QR Code border
- -i invert black and white
- -o string
- out PNG file prefix, empty for stdout
- -s int
- image size (pixel) (default 256)
- -t print as text-art on stdout
-
-Usage:
- 1. Arguments except for flags are joined by " " and used to generate QR code.
- Default output is STDOUT, pipe to imagemagick command "display" to display
- on any X server.
-
- qrcode hello word | display
-
- 2. Save to file if "display" not available:
-
- qrcode "homepage: https://github.com/skip2/go-qrcode" > out.png
-
-```
-## Maximum capacity
-The maximum capacity of a QR Code varies according to the content encoded and the error recovery level. The maximum capacity is 2,953 bytes, 4,296 alphanumeric characters, 7,089 numeric digits, or a combination of these.
-
-## Borderless QR Codes
-
-To aid QR Code reading software, QR codes have a built in whitespace border.
-
-If you know what you're doing, and don't want a border, see https://gist.github.com/skip2/7e3d8a82f5317df9be437f8ec8ec0b7d for how to do it. It's still recommended you include a border manually.
-
-## Links
-
-- [http://en.wikipedia.org/wiki/QR_code](http://en.wikipedia.org/wiki/QR_code)
-- [ISO/IEC 18004:2006](http://www.iso.org/iso/catalogue_detail.htm?csnumber=43655) - Main QR Code specification (approx CHF 198,00)<br>
-- [https://github.com/qpliu/qrencode-go/](https://github.com/qpliu/qrencode-go/) - alternative Go QR encoding library based on [ZXing](https://github.com/zxing/zxing)
diff --git a/vendor/github.com/skip2/go-qrcode/bitset/bitset.go b/vendor/github.com/skip2/go-qrcode/bitset/bitset.go
deleted file mode 100644
index fba3bf4d..00000000
--- a/vendor/github.com/skip2/go-qrcode/bitset/bitset.go
+++ /dev/null
@@ -1,273 +0,0 @@
-// go-qrcode
-// Copyright 2014 Tom Harwood
-
-// Package bitset implements an append only bit array.
-//
-// To create a Bitset and append some bits:
-// // Bitset Contents
-// b := bitset.New() // {}
-// b.AppendBools(true, true, false) // {1, 1, 0}
-// b.AppendBools(true) // {1, 1, 0, 1}
-// b.AppendValue(0x02, 4) // {1, 1, 0, 1, 0, 0, 1, 0}
-//
-// To read values:
-//
-// len := b.Len() // 8
-// v := b.At(0) // 1
-// v = b.At(1) // 1
-// v = b.At(2) // 0
-// v = b.At(8) // 0
-package bitset
-
-import (
- "bytes"
- "fmt"
- "log"
-)
-
-const (
- b0 = false
- b1 = true
-)
-
-// Bitset stores an array of bits.
-type Bitset struct {
- // The number of bits stored.
- numBits int
-
- // Storage for individual bits.
- bits []byte
-}
-
-// New returns an initialised Bitset with optional initial bits v.
-func New(v ...bool) *Bitset {
- b := &Bitset{numBits: 0, bits: make([]byte, 0)}
- b.AppendBools(v...)
-
- return b
-}
-
-// Clone returns a copy.
-func Clone(from *Bitset) *Bitset {
- return &Bitset{numBits: from.numBits, bits: from.bits[:]}
-}
-
-// Substr returns a substring, consisting of the bits from indexes start to end.
-func (b *Bitset) Substr(start int, end int) *Bitset {
- if start > end || end > b.numBits {
- log.Panicf("Out of range start=%d end=%d numBits=%d", start, end, b.numBits)
- }
-
- result := New()
- result.ensureCapacity(end - start)
-
- for i := start; i < end; i++ {
- if b.At(i) {
- result.bits[result.numBits/8] |= 0x80 >> uint(result.numBits%8)
- }
- result.numBits++
- }
-
- return result
-}
-
-// NewFromBase2String constructs and returns a Bitset from a string. The string
-// consists of '1', '0' or ' ' characters, e.g. "1010 0101". The '1' and '0'
-// characters represent true/false bits respectively, and ' ' characters are
-// ignored.
-//
-// The function panics if the input string contains other characters.
-func NewFromBase2String(b2string string) *Bitset {
- b := &Bitset{numBits: 0, bits: make([]byte, 0)}
-
- for _, c := range b2string {
- switch c {
- case '1':
- b.AppendBools(true)
- case '0':
- b.AppendBools(false)
- case ' ':
- default:
- log.Panicf("Invalid char %c in NewFromBase2String", c)
- }
- }
-
- return b
-}
-
-// AppendBytes appends a list of whole bytes.
-func (b *Bitset) AppendBytes(data []byte) {
- for _, d := range data {
- b.AppendByte(d, 8)
- }
-}
-
-// AppendByte appends the numBits least significant bits from value.
-func (b *Bitset) AppendByte(value byte, numBits int) {
- b.ensureCapacity(numBits)
-
- if numBits > 8 {
- log.Panicf("numBits %d out of range 0-8", numBits)
- }
-
- for i := numBits - 1; i >= 0; i-- {
- if value&(1<<uint(i)) != 0 {
- b.bits[b.numBits/8] |= 0x80 >> uint(b.numBits%8)
- }
-
- b.numBits++
- }
-}
-
-// AppendUint32 appends the numBits least significant bits from value.
-func (b *Bitset) AppendUint32(value uint32, numBits int) {
- b.ensureCapacity(numBits)
-
- if numBits > 32 {
- log.Panicf("numBits %d out of range 0-32", numBits)
- }
-
- for i := numBits - 1; i >= 0; i-- {
- if value&(1<<uint(i)) != 0 {
- b.bits[b.numBits/8] |= 0x80 >> uint(b.numBits%8)
- }
-
- b.numBits++
- }
-}
-
-// ensureCapacity ensures the Bitset can store an additional |numBits|.
-//
-// The underlying array is expanded if necessary. To prevent frequent
-// reallocation, expanding the underlying array at least doubles its capacity.
-func (b *Bitset) ensureCapacity(numBits int) {
- numBits += b.numBits
-
- newNumBytes := numBits / 8
- if numBits%8 != 0 {
- newNumBytes++
- }
-
- if len(b.bits) >= newNumBytes {
- return
- }
-
- b.bits = append(b.bits, make([]byte, newNumBytes+2*len(b.bits))...)
-}
-
-// Append bits copied from |other|.
-//
-// The new length is b.Len() + other.Len().
-func (b *Bitset) Append(other *Bitset) {
- b.ensureCapacity(other.numBits)
-
- for i := 0; i < other.numBits; i++ {
- if other.At(i) {
- b.bits[b.numBits/8] |= 0x80 >> uint(b.numBits%8)
- }
- b.numBits++
- }
-}
-
-// AppendBools appends bits to the Bitset.
-func (b *Bitset) AppendBools(bits ...bool) {
- b.ensureCapacity(len(bits))
-
- for _, v := range bits {
- if v {
- b.bits[b.numBits/8] |= 0x80 >> uint(b.numBits%8)
- }
- b.numBits++
- }
-}
-
-// AppendNumBools appends num bits of value value.
-func (b *Bitset) AppendNumBools(num int, value bool) {
- for i := 0; i < num; i++ {
- b.AppendBools(value)
- }
-}
-
-// String returns a human readable representation of the Bitset's contents.
-func (b *Bitset) String() string {
- var bitString string
- for i := 0; i < b.numBits; i++ {
- if (i % 8) == 0 {
- bitString += " "
- }
-
- if (b.bits[i/8] & (0x80 >> byte(i%8))) != 0 {
- bitString += "1"
- } else {
- bitString += "0"
- }
- }
-
- return fmt.Sprintf("numBits=%d, bits=%s", b.numBits, bitString)
-}
-
-// Len returns the length of the Bitset in bits.
-func (b *Bitset) Len() int {
- return b.numBits
-}
-
-// Bits returns the contents of the Bitset.
-func (b *Bitset) Bits() []bool {
- result := make([]bool, b.numBits)
-
- var i int
- for i = 0; i < b.numBits; i++ {
- result[i] = (b.bits[i/8] & (0x80 >> byte(i%8))) != 0
- }
-
- return result
-}
-
-// At returns the value of the bit at |index|.
-func (b *Bitset) At(index int) bool {
- if index >= b.numBits {
- log.Panicf("Index %d out of range", index)
- }
-
- return (b.bits[index/8] & (0x80 >> byte(index%8))) != 0
-}
-
-// Equals returns true if the Bitset equals other.
-func (b *Bitset) Equals(other *Bitset) bool {
- if b.numBits != other.numBits {
- return false
- }
-
- if !bytes.Equal(b.bits[0:b.numBits/8], other.bits[0:b.numBits/8]) {
- return false
- }
-
- for i := 8 * (b.numBits / 8); i < b.numBits; i++ {
- a := (b.bits[i/8] & (0x80 >> byte(i%8)))
- b := (other.bits[i/8] & (0x80 >> byte(i%8)))
-
- if a != b {
- return false
- }
- }
-
- return true
-}
-
-// ByteAt returns a byte consisting of upto 8 bits starting at index.
-func (b *Bitset) ByteAt(index int) byte {
- if index < 0 || index >= b.numBits {
- log.Panicf("Index %d out of range", index)
- }
-
- var result byte
-
- for i := index; i < index+8 && i < b.numBits; i++ {
- result <<= 1
- if b.At(i) {
- result |= 1
- }
- }
-
- return result
-}
diff --git a/vendor/github.com/skip2/go-qrcode/encoder.go b/vendor/github.com/skip2/go-qrcode/encoder.go
deleted file mode 100644
index 6a809cfe..00000000
--- a/vendor/github.com/skip2/go-qrcode/encoder.go
+++ /dev/null
@@ -1,486 +0,0 @@
-// go-qrcode
-// Copyright 2014 Tom Harwood
-
-package qrcode
-
-import (
- "errors"
- "log"
-
- bitset "github.com/skip2/go-qrcode/bitset"
-)
-
-// Data encoding.
-//
-// The main data portion of a QR Code consists of one or more segments of data.
-// A segment consists of:
-//
-// - The segment Data Mode: numeric, alphanumeric, or byte.
-// - The length of segment in bits.
-// - Encoded data.
-//
-// For example, the string "123ZZ#!#!" may be represented as:
-//
-// [numeric, 3, "123"] [alphanumeric, 2, "ZZ"] [byte, 4, "#!#!"]
-//
-// Multiple data modes exist to minimise the size of encoded data. For example,
-// 8-bit bytes require 8 bits to encode each, but base 10 numeric data can be
-// encoded at a higher density of 3 numbers (e.g. 123) per 10 bits.
-//
-// Some data can be represented in multiple modes. Numeric data can be
-// represented in all three modes, whereas alphanumeric data (e.g. 'A') can be
-// represented in alphanumeric and byte mode.
-//
-// Starting a new segment (to use a different Data Mode) has a cost, the bits to
-// state the new segment Data Mode and length. To minimise each QR Code's symbol
-// size, an optimisation routine coalesces segment types where possible, to
-// reduce the encoded data length.
-//
-// There are several other data modes available (e.g. Kanji mode) which are not
-// implemented here.
-
-// A segment encoding mode.
-type dataMode uint8
-
-const (
- // Each dataMode is a subset of the subsequent dataMode:
- // dataModeNone < dataModeNumeric < dataModeAlphanumeric < dataModeByte
- //
- // This ordering is important for determining which data modes a character can
- // be encoded with. E.g. 'E' can be encoded in both dataModeAlphanumeric and
- // dataModeByte.
- dataModeNone dataMode = 1 << iota
- dataModeNumeric
- dataModeAlphanumeric
- dataModeByte
-)
-
-// dataModeString returns d as a short printable string.
-func dataModeString(d dataMode) string {
- switch d {
- case dataModeNone:
- return "none"
- case dataModeNumeric:
- return "numeric"
- case dataModeAlphanumeric:
- return "alphanumeric"
- case dataModeByte:
- return "byte"
- }
-
- return "unknown"
-}
-
-type dataEncoderType uint8
-
-const (
- dataEncoderType1To9 dataEncoderType = iota
- dataEncoderType10To26
- dataEncoderType27To40
-)
-
-// segment is a single segment of data.
-type segment struct {
- // Data Mode (e.g. numeric).
- dataMode dataMode
-
- // segment data (e.g. "abc").
- data []byte
-}
-
-// A dataEncoder encodes data for a particular QR Code version.
-type dataEncoder struct {
- // Minimum & maximum versions supported.
- minVersion int
- maxVersion int
-
- // Mode indicator bit sequences.
- numericModeIndicator *bitset.Bitset
- alphanumericModeIndicator *bitset.Bitset
- byteModeIndicator *bitset.Bitset
-
- // Character count lengths.
- numNumericCharCountBits int
- numAlphanumericCharCountBits int
- numByteCharCountBits int
-
- // The raw input data.
- data []byte
-
- // The data classified into unoptimised segments.
- actual []segment
-
- // The data classified into optimised segments.
- optimised []segment
-}
-
-// newDataEncoder constructs a dataEncoder.
-func newDataEncoder(t dataEncoderType) *dataEncoder {
- d := &dataEncoder{}
-
- switch t {
- case dataEncoderType1To9:
- d = &dataEncoder{
- minVersion: 1,
- maxVersion: 9,
- numericModeIndicator: bitset.New(b0, b0, b0, b1),
- alphanumericModeIndicator: bitset.New(b0, b0, b1, b0),
- byteModeIndicator: bitset.New(b0, b1, b0, b0),
- numNumericCharCountBits: 10,
- numAlphanumericCharCountBits: 9,
- numByteCharCountBits: 8,
- }
- case dataEncoderType10To26:
- d = &dataEncoder{
- minVersion: 10,
- maxVersion: 26,
- numericModeIndicator: bitset.New(b0, b0, b0, b1),
- alphanumericModeIndicator: bitset.New(b0, b0, b1, b0),
- byteModeIndicator: bitset.New(b0, b1, b0, b0),
- numNumericCharCountBits: 12,
- numAlphanumericCharCountBits: 11,
- numByteCharCountBits: 16,
- }
- case dataEncoderType27To40:
- d = &dataEncoder{
- minVersion: 27,
- maxVersion: 40,
- numericModeIndicator: bitset.New(b0, b0, b0, b1),
- alphanumericModeIndicator: bitset.New(b0, b0, b1, b0),
- byteModeIndicator: bitset.New(b0, b1, b0, b0),
- numNumericCharCountBits: 14,
- numAlphanumericCharCountBits: 13,
- numByteCharCountBits: 16,
- }
- default:
- log.Panic("Unknown dataEncoderType")
- }
-
- return d
-}
-
-// encode data as one or more segments and return the encoded data.
-//
-// The returned data does not include the terminator bit sequence.
-func (d *dataEncoder) encode(data []byte) (*bitset.Bitset, error) {
- d.data = data
- d.actual = nil
- d.optimised = nil
-
- if len(data) == 0 {
- return nil, errors.New("no data to encode")
- }
-
- // Classify data into unoptimised segments.
- highestRequiredMode := d.classifyDataModes()
-
- // Optimise segments.
- err := d.optimiseDataModes()
- if err != nil {
- return nil, err
- }
-
- // Check if a single byte encoded segment would be more efficient.
- optimizedLength := 0
- for _, s := range d.optimised {
- length, err := d.encodedLength(s.dataMode, len(s.data))
- if err != nil {
- return nil, err
- }
- optimizedLength += length
- }
-
- singleByteSegmentLength, err := d.encodedLength(highestRequiredMode, len(d.data))
- if err != nil {
- return nil, err
- }
-
- if singleByteSegmentLength <= optimizedLength {
- d.optimised = []segment{segment{dataMode: highestRequiredMode, data: d.data}}
- }
-
- // Encode data.
- encoded := bitset.New()
- for _, s := range d.optimised {
- d.encodeDataRaw(s.data, s.dataMode, encoded)
- }
-
- return encoded, nil
-}
-
-// classifyDataModes classifies the raw data into unoptimised segments.
-// e.g. "123ZZ#!#!" =>
-// [numeric, 3, "123"] [alphanumeric, 2, "ZZ"] [byte, 4, "#!#!"].
-//
-// Returns the highest data mode needed to encode the data. e.g. for a mixed
-// numeric/alphanumeric input, the highest is alphanumeric.
-//
-// dataModeNone < dataModeNumeric < dataModeAlphanumeric < dataModeByte
-func (d *dataEncoder) classifyDataModes() dataMode {
- var start int
- mode := dataModeNone
- highestRequiredMode := mode
-
- for i, v := range d.data {
- newMode := dataModeNone
- switch {
- case v >= 0x30 && v <= 0x39:
- newMode = dataModeNumeric
- case v == 0x20 || v == 0x24 || v == 0x25 || v == 0x2a || v == 0x2b || v ==
- 0x2d || v == 0x2e || v == 0x2f || v == 0x3a || (v >= 0x41 && v <= 0x5a):
- newMode = dataModeAlphanumeric
- default:
- newMode = dataModeByte
- }
-
- if newMode != mode {
- if i > 0 {
- d.actual = append(d.actual, segment{dataMode: mode, data: d.data[start:i]})
-
- start = i
- }
-
- mode = newMode
- }
-
- if newMode > highestRequiredMode {
- highestRequiredMode = newMode
- }
- }
-
- d.actual = append(d.actual, segment{dataMode: mode, data: d.data[start:len(d.data)]})
-
- return highestRequiredMode
-}
-
-// optimiseDataModes optimises the list of segments to reduce the overall output
-// encoded data length.
-//
-// The algorithm coalesces adjacent segments. segments are only coalesced when
-// the Data Modes are compatible, and when the coalesced segment has a shorter
-// encoded length than separate segments.
-//
-// Multiple segments may be coalesced. For example a string of alternating
-// alphanumeric/numeric segments ANANANANA can be optimised to just A.
-func (d *dataEncoder) optimiseDataModes() error {
- for i := 0; i < len(d.actual); {
- mode := d.actual[i].dataMode
- numChars := len(d.actual[i].data)
-
- j := i + 1
- for j < len(d.actual) {
- nextNumChars := len(d.actual[j].data)
- nextMode := d.actual[j].dataMode
-
- if nextMode > mode {
- break
- }
-
- coalescedLength, err := d.encodedLength(mode, numChars+nextNumChars)
-
- if err != nil {
- return err
- }
-
- seperateLength1, err := d.encodedLength(mode, numChars)
-
- if err != nil {
- return err
- }
-
- seperateLength2, err := d.encodedLength(nextMode, nextNumChars)
-
- if err != nil {
- return err
- }
-
- if coalescedLength < seperateLength1+seperateLength2 {
- j++
- numChars += nextNumChars
- } else {
- break
- }
- }
-
- optimised := segment{dataMode: mode,
- data: make([]byte, 0, numChars)}
-
- for k := i; k < j; k++ {
- optimised.data = append(optimised.data, d.actual[k].data...)
- }
-
- d.optimised = append(d.optimised, optimised)
-
- i = j
- }
-
- return nil
-}
-
-// encodeDataRaw encodes data in dataMode. The encoded data is appended to
-// encoded.
-func (d *dataEncoder) encodeDataRaw(data []byte, dataMode dataMode, encoded *bitset.Bitset) {
- modeIndicator := d.modeIndicator(dataMode)
- charCountBits := d.charCountBits(dataMode)
-
- // Append mode indicator.
- encoded.Append(modeIndicator)
-
- // Append character count.
- encoded.AppendUint32(uint32(len(data)), charCountBits)
-
- // Append data.
- switch dataMode {
- case dataModeNumeric:
- for i := 0; i < len(data); i += 3 {
- charsRemaining := len(data) - i
-
- var value uint32
- bitsUsed := 1
-
- for j := 0; j < charsRemaining && j < 3; j++ {
- value *= 10
- value += uint32(data[i+j] - 0x30)
- bitsUsed += 3
- }
- encoded.AppendUint32(value, bitsUsed)
- }
- case dataModeAlphanumeric:
- for i := 0; i < len(data); i += 2 {
- charsRemaining := len(data) - i
-
- var value uint32
- for j := 0; j < charsRemaining && j < 2; j++ {
- value *= 45
- value += encodeAlphanumericCharacter(data[i+j])
- }
-
- bitsUsed := 6
- if charsRemaining > 1 {
- bitsUsed = 11
- }
-
- encoded.AppendUint32(value, bitsUsed)
- }
- case dataModeByte:
- for _, b := range data {
- encoded.AppendByte(b, 8)
- }
- }
-}
-
-// modeIndicator returns the segment header bits for a segment of type dataMode.
-func (d *dataEncoder) modeIndicator(dataMode dataMode) *bitset.Bitset {
- switch dataMode {
- case dataModeNumeric:
- return d.numericModeIndicator
- case dataModeAlphanumeric:
- return d.alphanumericModeIndicator
- case dataModeByte:
- return d.byteModeIndicator
- default:
- log.Panic("Unknown data mode")
- }
-
- return nil
-}
-
-// charCountBits returns the number of bits used to encode the length of a data
-// segment of type dataMode.
-func (d *dataEncoder) charCountBits(dataMode dataMode) int {
- switch dataMode {
- case dataModeNumeric:
- return d.numNumericCharCountBits
- case dataModeAlphanumeric:
- return d.numAlphanumericCharCountBits
- case dataModeByte:
- return d.numByteCharCountBits
- default:
- log.Panic("Unknown data mode")
- }
-
- return 0
-}
-
-// encodedLength returns the number of bits required to encode n symbols in
-// dataMode.
-//
-// The number of bits required is affected by:
-// - QR code type - Mode Indicator length.
-// - Data mode - number of bits used to represent data length.
-// - Data mode - how the data is encoded.
-// - Number of symbols encoded.
-//
-// An error is returned if the mode is not supported, or the length requested is
-// too long to be represented.
-func (d *dataEncoder) encodedLength(dataMode dataMode, n int) (int, error) {
- modeIndicator := d.modeIndicator(dataMode)
- charCountBits := d.charCountBits(dataMode)
-
- if modeIndicator == nil {
- return 0, errors.New("mode not supported")
- }
-
- maxLength := (1 << uint8(charCountBits)) - 1
-
- if n > maxLength {
- return 0, errors.New("length too long to be represented")
- }
-
- length := modeIndicator.Len() + charCountBits
-
- switch dataMode {
- case dataModeNumeric:
- length += 10 * (n / 3)
-
- if n%3 != 0 {
- length += 1 + 3*(n%3)
- }
- case dataModeAlphanumeric:
- length += 11 * (n / 2)
- length += 6 * (n % 2)
- case dataModeByte:
- length += 8 * n
- }
-
- return length, nil
-}
-
-// encodeAlphanumericChar returns the QR Code encoded value of v.
-//
-// v must be a QR Code defined alphanumeric character: 0-9, A-Z, SP, $%*+-./ or
-// :. The characters are mapped to values in the range 0-44 respectively.
-func encodeAlphanumericCharacter(v byte) uint32 {
- c := uint32(v)
-
- switch {
- case c >= '0' && c <= '9':
- // 0-9 encoded as 0-9.
- return c - '0'
- case c >= 'A' && c <= 'Z':
- // A-Z encoded as 10-35.
- return c - 'A' + 10
- case c == ' ':
- return 36
- case c == '$':
- return 37
- case c == '%':
- return 38
- case c == '*':
- return 39
- case c == '+':
- return 40
- case c == '-':
- return 41
- case c == '.':
- return 42
- case c == '/':
- return 43
- case c == ':':
- return 44
- default:
- log.Panicf("encodeAlphanumericCharacter() with non alphanumeric char %v.", v)
- }
-
- return 0
-}
diff --git a/vendor/github.com/skip2/go-qrcode/qrcode.go b/vendor/github.com/skip2/go-qrcode/qrcode.go
deleted file mode 100644
index d0541bcb..00000000
--- a/vendor/github.com/skip2/go-qrcode/qrcode.go
+++ /dev/null
@@ -1,608 +0,0 @@
-// go-qrcode
-// Copyright 2014 Tom Harwood
-
-/*
-Package qrcode implements a QR Code encoder.
-
-A QR Code is a matrix (two-dimensional) barcode. Arbitrary content may be
-encoded.
-
-A QR Code contains error recovery information to aid reading damaged or
-obscured codes. There are four levels of error recovery: qrcode.{Low, Medium,
-High, Highest}. QR Codes with a higher recovery level are more robust to damage,
-at the cost of being physically larger.
-
-Three functions cover most use cases:
-
-- Create a PNG image:
-
- var png []byte
- png, err := qrcode.Encode("https://example.org", qrcode.Medium, 256)
-
-- Create a PNG image and write to a file:
-
- err := qrcode.WriteFile("https://example.org", qrcode.Medium, 256, "qr.png")
-
-- Create a PNG image with custom colors and write to file:
-
- err := qrcode.WriteColorFile("https://example.org", qrcode.Medium, 256, color.Black, color.White, "qr.png")
-
-All examples use the qrcode.Medium error Recovery Level and create a fixed
-256x256px size QR Code. The last function creates a white on black instead of black
-on white QR Code.
-
-To generate a variable sized image instead, specify a negative size (in place of
-the 256 above), such as -4 or -5. Larger negative numbers create larger images:
-A size of -5 sets each module (QR Code "pixel") to be 5px wide/high.
-
-- Create a PNG image (variable size, with minimum white padding) and write to a file:
-
- err := qrcode.WriteFile("https://example.org", qrcode.Medium, -5, "qr.png")
-
-The maximum capacity of a QR Code varies according to the content encoded and
-the error recovery level. The maximum capacity is 2,953 bytes, 4,296
-alphanumeric characters, 7,089 numeric digits, or a combination of these.
-
-This package implements a subset of QR Code 2005, as defined in ISO/IEC
-18004:2006.
-*/
-package qrcode
-
-import (
- "bytes"
- "errors"
- "fmt"
- "image"
- "image/color"
- "image/png"
- "io"
- "io/ioutil"
- "log"
- "os"
-
- bitset "github.com/skip2/go-qrcode/bitset"
- reedsolomon "github.com/skip2/go-qrcode/reedsolomon"
-)
-
-// Encode a QR Code and return a raw PNG image.
-//
-// size is both the image width and height in pixels. If size is too small then
-// a larger image is silently returned. Negative values for size cause a
-// variable sized image to be returned: See the documentation for Image().
-//
-// To serve over HTTP, remember to send a Content-Type: image/png header.
-func Encode(content string, level RecoveryLevel, size int) ([]byte, error) {
- var q *QRCode
-
- q, err := New(content, level)
-
- if err != nil {
- return nil, err
- }
-
- return q.PNG(size)
-}
-
-// WriteFile encodes, then writes a QR Code to the given filename in PNG format.
-//
-// size is both the image width and height in pixels. If size is too small then
-// a larger image is silently written. Negative values for size cause a variable
-// sized image to be written: See the documentation for Image().
-func WriteFile(content string, level RecoveryLevel, size int, filename string) error {
- var q *QRCode
-
- q, err := New(content, level)
-
- if err != nil {
- return err
- }
-
- return q.WriteFile(size, filename)
-}
-
-// WriteColorFile encodes, then writes a QR Code to the given filename in PNG format.
-// With WriteColorFile you can also specify the colors you want to use.
-//
-// size is both the image width and height in pixels. If size is too small then
-// a larger image is silently written. Negative values for size cause a variable
-// sized image to be written: See the documentation for Image().
-func WriteColorFile(content string, level RecoveryLevel, size int, background,
- foreground color.Color, filename string) error {
-
- var q *QRCode
-
- q, err := New(content, level)
-
- q.BackgroundColor = background
- q.ForegroundColor = foreground
-
- if err != nil {
- return err
- }
-
- return q.WriteFile(size, filename)
-}
-
-// A QRCode represents a valid encoded QRCode.
-type QRCode struct {
- // Original content encoded.
- Content string
-
- // QR Code type.
- Level RecoveryLevel
- VersionNumber int
-
- // User settable drawing options.
- ForegroundColor color.Color
- BackgroundColor color.Color
-
- // Disable the QR Code border.
- DisableBorder bool
-
- encoder *dataEncoder
- version qrCodeVersion
-
- data *bitset.Bitset
- symbol *symbol
- mask int
-}
-
-// New constructs a QRCode.
-//
-// var q *qrcode.QRCode
-// q, err := qrcode.New("my content", qrcode.Medium)
-//
-// An error occurs if the content is too long.
-func New(content string, level RecoveryLevel) (*QRCode, error) {
- encoders := []dataEncoderType{dataEncoderType1To9, dataEncoderType10To26,
- dataEncoderType27To40}
-
- var encoder *dataEncoder
- var encoded *bitset.Bitset
- var chosenVersion *qrCodeVersion
- var err error
-
- for _, t := range encoders {
- encoder = newDataEncoder(t)
- encoded, err = encoder.encode([]byte(content))
-
- if err != nil {
- continue
- }
-
- chosenVersion = chooseQRCodeVersion(level, encoder, encoded.Len())
-
- if chosenVersion != nil {
- break
- }
- }
-
- if err != nil {
- return nil, err
- } else if chosenVersion == nil {
- return nil, errors.New("content too long to encode")
- }
-
- q := &QRCode{
- Content: content,
-
- Level: level,
- VersionNumber: chosenVersion.version,
-
- ForegroundColor: color.Black,
- BackgroundColor: color.White,
-
- encoder: encoder,
- data: encoded,
- version: *chosenVersion,
- }
-
- return q, nil
-}
-
-// NewWithForcedVersion constructs a QRCode of a specific version.
-//
-// var q *qrcode.QRCode
-// q, err := qrcode.NewWithForcedVersion("my content", 25, qrcode.Medium)
-//
-// An error occurs in case of invalid version.
-func NewWithForcedVersion(content string, version int, level RecoveryLevel) (*QRCode, error) {
- var encoder *dataEncoder
-
- switch {
- case version >= 1 && version <= 9:
- encoder = newDataEncoder(dataEncoderType1To9)
- case version >= 10 && version <= 26:
- encoder = newDataEncoder(dataEncoderType10To26)
- case version >= 27 && version <= 40:
- encoder = newDataEncoder(dataEncoderType27To40)
- default:
- return nil, fmt.Errorf("Invalid version %d (expected 1-40 inclusive)", version)
- }
-
- var encoded *bitset.Bitset
- encoded, err := encoder.encode([]byte(content))
-
- if err != nil {
- return nil, err
- }
-
- chosenVersion := getQRCodeVersion(level, version)
-
- if chosenVersion == nil {
- return nil, errors.New("cannot find QR Code version")
- }
-
- if encoded.Len() > chosenVersion.numDataBits() {
- return nil, fmt.Errorf("Cannot encode QR code: content too large for fixed size QR Code version %d (encoded length is %d bits, maximum length is %d bits)",
- version,
- encoded.Len(),
- chosenVersion.numDataBits())
- }
-
- q := &QRCode{
- Content: content,
-
- Level: level,
- VersionNumber: chosenVersion.version,
-
- ForegroundColor: color.Black,
- BackgroundColor: color.White,
-
- encoder: encoder,
- data: encoded,
- version: *chosenVersion,
- }
-
- return q, nil
-}
-
-// Bitmap returns the QR Code as a 2D array of 1-bit pixels.
-//
-// bitmap[y][x] is true if the pixel at (x, y) is set.
-//
-// The bitmap includes the required "quiet zone" around the QR Code to aid
-// decoding.
-func (q *QRCode) Bitmap() [][]bool {
- // Build QR code.
- q.encode()
-
- return q.symbol.bitmap()
-}
-
-// Image returns the QR Code as an image.Image.
-//
-// A positive size sets a fixed image width and height (e.g. 256 yields an
-// 256x256px image).
-//
-// Depending on the amount of data encoded, fixed size images can have different
-// amounts of padding (white space around the QR Code). As an alternative, a
-// variable sized image can be generated instead:
-//
-// A negative size causes a variable sized image to be returned. The image
-// returned is the minimum size required for the QR Code. Choose a larger
-// negative number to increase the scale of the image. e.g. a size of -5 causes
-// each module (QR Code "pixel") to be 5px in size.
-func (q *QRCode) Image(size int) image.Image {
- // Build QR code.
- q.encode()
-
- // Minimum pixels (both width and height) required.
- realSize := q.symbol.size
-
- // Variable size support.
- if size < 0 {
- size = size * -1 * realSize
- }
-
- // Actual pixels available to draw the symbol. Automatically increase the
- // image size if it's not large enough.
- if size < realSize {
- size = realSize
- }
-
- // Output image.
- rect := image.Rectangle{Min: image.Point{0, 0}, Max: image.Point{size, size}}
-
- // Saves a few bytes to have them in this order
- p := color.Palette([]color.Color{q.BackgroundColor, q.ForegroundColor})
- img := image.NewPaletted(rect, p)
- fgClr := uint8(img.Palette.Index(q.ForegroundColor))
-
- // QR code bitmap.
- bitmap := q.symbol.bitmap()
-
- // Map each image pixel to the nearest QR code module.
- modulesPerPixel := float64(realSize) / float64(size)
- for y := 0; y < size; y++ {
- y2 := int(float64(y) * modulesPerPixel)
- for x := 0; x < size; x++ {
- x2 := int(float64(x) * modulesPerPixel)
-
- v := bitmap[y2][x2]
-
- if v {
- pos := img.PixOffset(x, y)
- img.Pix[pos] = fgClr
- }
- }
- }
-
- return img
-}
-
-// PNG returns the QR Code as a PNG image.
-//
-// size is both the image width and height in pixels. If size is too small then
-// a larger image is silently returned. Negative values for size cause a
-// variable sized image to be returned: See the documentation for Image().
-func (q *QRCode) PNG(size int) ([]byte, error) {
- img := q.Image(size)
-
- encoder := png.Encoder{CompressionLevel: png.BestCompression}
-
- var b bytes.Buffer
- err := encoder.Encode(&b, img)
-
- if err != nil {
- return nil, err
- }
-
- return b.Bytes(), nil
-}
-
-// Write writes the QR Code as a PNG image to io.Writer.
-//
-// size is both the image width and height in pixels. If size is too small then
-// a larger image is silently written. Negative values for size cause a
-// variable sized image to be written: See the documentation for Image().
-func (q *QRCode) Write(size int, out io.Writer) error {
- var png []byte
-
- png, err := q.PNG(size)
-
- if err != nil {
- return err
- }
- _, err = out.Write(png)
- return err
-}
-
-// WriteFile writes the QR Code as a PNG image to the specified file.
-//
-// size is both the image width and height in pixels. If size is too small then
-// a larger image is silently written. Negative values for size cause a
-// variable sized image to be written: See the documentation for Image().
-func (q *QRCode) WriteFile(size int, filename string) error {
- var png []byte
-
- png, err := q.PNG(size)
-
- if err != nil {
- return err
- }
-
- return ioutil.WriteFile(filename, png, os.FileMode(0644))
-}
-
-// encode completes the steps required to encode the QR Code. These include
-// adding the terminator bits and padding, splitting the data into blocks and
-// applying the error correction, and selecting the best data mask.
-func (q *QRCode) encode() {
- numTerminatorBits := q.version.numTerminatorBitsRequired(q.data.Len())
-
- q.addTerminatorBits(numTerminatorBits)
- q.addPadding()
-
- encoded := q.encodeBlocks()
-
- const numMasks int = 8
- penalty := 0
-
- for mask := 0; mask < numMasks; mask++ {
- var s *symbol
- var err error
-
- s, err = buildRegularSymbol(q.version, mask, encoded, !q.DisableBorder)
-
- if err != nil {
- log.Panic(err.Error())
- }
-
- numEmptyModules := s.numEmptyModules()
- if numEmptyModules != 0 {
- log.Panicf("bug: numEmptyModules is %d (expected 0) (version=%d)",
- numEmptyModules, q.VersionNumber)
- }
-
- p := s.penaltyScore()
-
- //log.Printf("mask=%d p=%3d p1=%3d p2=%3d p3=%3d p4=%d\n", mask, p, s.penalty1(), s.penalty2(), s.penalty3(), s.penalty4())
-
- if q.symbol == nil || p < penalty {
- q.symbol = s
- q.mask = mask
- penalty = p
- }
- }
-}
-
-// addTerminatorBits adds final terminator bits to the encoded data.
-//
-// The number of terminator bits required is determined when the QR Code version
-// is chosen (which itself depends on the length of the data encoded). The
-// terminator bits are thus added after the QR Code version
-// is chosen, rather than at the data encoding stage.
-func (q *QRCode) addTerminatorBits(numTerminatorBits int) {
- q.data.AppendNumBools(numTerminatorBits, false)
-}
-
-// encodeBlocks takes the completed (terminated & padded) encoded data, splits
-// the data into blocks (as specified by the QR Code version), applies error
-// correction to each block, then interleaves the blocks together.
-//
-// The QR Code's final data sequence is returned.
-func (q *QRCode) encodeBlocks() *bitset.Bitset {
- // Split into blocks.
- type dataBlock struct {
- data *bitset.Bitset
- ecStartOffset int
- }
-
- block := make([]dataBlock, q.version.numBlocks())
-
- start := 0
- end := 0
- blockID := 0
-
- for _, b := range q.version.block {
- for j := 0; j < b.numBlocks; j++ {
- start = end
- end = start + b.numDataCodewords*8
-
- // Apply error correction to each block.
- numErrorCodewords := b.numCodewords - b.numDataCodewords
- block[blockID].data = reedsolomon.Encode(q.data.Substr(start, end), numErrorCodewords)
- block[blockID].ecStartOffset = end - start
-
- blockID++
- }
- }
-
- // Interleave the blocks.
-
- result := bitset.New()
-
- // Combine data blocks.
- working := true
- for i := 0; working; i += 8 {
- working = false
-
- for j, b := range block {
- if i >= block[j].ecStartOffset {
- continue
- }
-
- result.Append(b.data.Substr(i, i+8))
-
- working = true
- }
- }
-
- // Combine error correction blocks.
- working = true
- for i := 0; working; i += 8 {
- working = false
-
- for j, b := range block {
- offset := i + block[j].ecStartOffset
- if offset >= block[j].data.Len() {
- continue
- }
-
- result.Append(b.data.Substr(offset, offset+8))
-
- working = true
- }
- }
-
- // Append remainder bits.
- result.AppendNumBools(q.version.numRemainderBits, false)
-
- return result
-}
-
-// max returns the maximum of a and b.
-func max(a int, b int) int {
- if a > b {
- return a
- }
-
- return b
-}
-
-// addPadding pads the encoded data upto the full length required.
-func (q *QRCode) addPadding() {
- numDataBits := q.version.numDataBits()
-
- if q.data.Len() == numDataBits {
- return
- }
-
- // Pad to the nearest codeword boundary.
- q.data.AppendNumBools(q.version.numBitsToPadToCodeword(q.data.Len()), false)
-
- // Pad codewords 0b11101100 and 0b00010001.
- padding := [2]*bitset.Bitset{
- bitset.New(true, true, true, false, true, true, false, false),
- bitset.New(false, false, false, true, false, false, false, true),
- }
-
- // Insert pad codewords alternately.
- i := 0
- for numDataBits-q.data.Len() >= 8 {
- q.data.Append(padding[i])
-
- i = 1 - i // Alternate between 0 and 1.
- }
-
- if q.data.Len() != numDataBits {
- log.Panicf("BUG: got len %d, expected %d", q.data.Len(), numDataBits)
- }
-}
-
-// ToString produces a multi-line string that forms a QR-code image.
-func (q *QRCode) ToString(inverseColor bool) string {
- bits := q.Bitmap()
- var buf bytes.Buffer
- for y := range bits {
- for x := range bits[y] {
- if bits[y][x] != inverseColor {
- buf.WriteString(" ")
- } else {
- buf.WriteString("██")
- }
- }
- buf.WriteString("\n")
- }
- return buf.String()
-}
-
-// ToSmallString produces a multi-line string that forms a QR-code image, a
-// factor two smaller in x and y then ToString.
-func (q *QRCode) ToSmallString(inverseColor bool) string {
- bits := q.Bitmap()
- var buf bytes.Buffer
- // if there is an odd number of rows, the last one needs special treatment
- for y := 0; y < len(bits)-1; y += 2 {
- for x := range bits[y] {
- if bits[y][x] == bits[y+1][x] {
- if bits[y][x] != inverseColor {
- buf.WriteString(" ")
- } else {
- buf.WriteString("â–ˆ")
- }
- } else {
- if bits[y][x] != inverseColor {
- buf.WriteString("â–„")
- } else {
- buf.WriteString("â–€")
- }
- }
- }
- buf.WriteString("\n")
- }
- // special treatment for the last row if odd
- if len(bits)%2 == 1 {
- y := len(bits) - 1
- for x := range bits[y] {
- if bits[y][x] != inverseColor {
- buf.WriteString(" ")
- } else {
- buf.WriteString("â–€")
- }
- }
- buf.WriteString("\n")
- }
- return buf.String()
-}
diff --git a/vendor/github.com/skip2/go-qrcode/reedsolomon/gf2_8.go b/vendor/github.com/skip2/go-qrcode/reedsolomon/gf2_8.go
deleted file mode 100644
index 6a7003f7..00000000
--- a/vendor/github.com/skip2/go-qrcode/reedsolomon/gf2_8.go
+++ /dev/null
@@ -1,387 +0,0 @@
-// go-qrcode
-// Copyright 2014 Tom Harwood
-
-package reedsolomon
-
-// Addition, subtraction, multiplication, and division in GF(2^8).
-// Operations are performed modulo x^8 + x^4 + x^3 + x^2 + 1.
-
-// http://en.wikipedia.org/wiki/Finite_field_arithmetic
-
-import "log"
-
-const (
- gfZero = gfElement(0)
- gfOne = gfElement(1)
-)
-
-var (
- gfExpTable = [256]gfElement{
- /* 0 - 9 */ 1, 2, 4, 8, 16, 32, 64, 128, 29, 58,
- /* 10 - 19 */ 116, 232, 205, 135, 19, 38, 76, 152, 45, 90,
- /* 20 - 29 */ 180, 117, 234, 201, 143, 3, 6, 12, 24, 48,
- /* 30 - 39 */ 96, 192, 157, 39, 78, 156, 37, 74, 148, 53,
- /* 40 - 49 */ 106, 212, 181, 119, 238, 193, 159, 35, 70, 140,
- /* 50 - 59 */ 5, 10, 20, 40, 80, 160, 93, 186, 105, 210,
- /* 60 - 69 */ 185, 111, 222, 161, 95, 190, 97, 194, 153, 47,
- /* 70 - 79 */ 94, 188, 101, 202, 137, 15, 30, 60, 120, 240,
- /* 80 - 89 */ 253, 231, 211, 187, 107, 214, 177, 127, 254, 225,
- /* 90 - 99 */ 223, 163, 91, 182, 113, 226, 217, 175, 67, 134,
- /* 100 - 109 */ 17, 34, 68, 136, 13, 26, 52, 104, 208, 189,
- /* 110 - 119 */ 103, 206, 129, 31, 62, 124, 248, 237, 199, 147,
- /* 120 - 129 */ 59, 118, 236, 197, 151, 51, 102, 204, 133, 23,
- /* 130 - 139 */ 46, 92, 184, 109, 218, 169, 79, 158, 33, 66,
- /* 140 - 149 */ 132, 21, 42, 84, 168, 77, 154, 41, 82, 164,
- /* 150 - 159 */ 85, 170, 73, 146, 57, 114, 228, 213, 183, 115,
- /* 160 - 169 */ 230, 209, 191, 99, 198, 145, 63, 126, 252, 229,
- /* 170 - 179 */ 215, 179, 123, 246, 241, 255, 227, 219, 171, 75,
- /* 180 - 189 */ 150, 49, 98, 196, 149, 55, 110, 220, 165, 87,
- /* 190 - 199 */ 174, 65, 130, 25, 50, 100, 200, 141, 7, 14,
- /* 200 - 209 */ 28, 56, 112, 224, 221, 167, 83, 166, 81, 162,
- /* 210 - 219 */ 89, 178, 121, 242, 249, 239, 195, 155, 43, 86,
- /* 220 - 229 */ 172, 69, 138, 9, 18, 36, 72, 144, 61, 122,
- /* 230 - 239 */ 244, 245, 247, 243, 251, 235, 203, 139, 11, 22,
- /* 240 - 249 */ 44, 88, 176, 125, 250, 233, 207, 131, 27, 54,
- /* 250 - 255 */ 108, 216, 173, 71, 142, 1}
-
- gfLogTable = [256]int{
- /* 0 - 9 */ -1, 0, 1, 25, 2, 50, 26, 198, 3, 223,
- /* 10 - 19 */ 51, 238, 27, 104, 199, 75, 4, 100, 224, 14,
- /* 20 - 29 */ 52, 141, 239, 129, 28, 193, 105, 248, 200, 8,
- /* 30 - 39 */ 76, 113, 5, 138, 101, 47, 225, 36, 15, 33,
- /* 40 - 49 */ 53, 147, 142, 218, 240, 18, 130, 69, 29, 181,
- /* 50 - 59 */ 194, 125, 106, 39, 249, 185, 201, 154, 9, 120,
- /* 60 - 69 */ 77, 228, 114, 166, 6, 191, 139, 98, 102, 221,
- /* 70 - 79 */ 48, 253, 226, 152, 37, 179, 16, 145, 34, 136,
- /* 80 - 89 */ 54, 208, 148, 206, 143, 150, 219, 189, 241, 210,
- /* 90 - 99 */ 19, 92, 131, 56, 70, 64, 30, 66, 182, 163,
- /* 100 - 109 */ 195, 72, 126, 110, 107, 58, 40, 84, 250, 133,
- /* 110 - 119 */ 186, 61, 202, 94, 155, 159, 10, 21, 121, 43,
- /* 120 - 129 */ 78, 212, 229, 172, 115, 243, 167, 87, 7, 112,
- /* 130 - 139 */ 192, 247, 140, 128, 99, 13, 103, 74, 222, 237,
- /* 140 - 149 */ 49, 197, 254, 24, 227, 165, 153, 119, 38, 184,
- /* 150 - 159 */ 180, 124, 17, 68, 146, 217, 35, 32, 137, 46,
- /* 160 - 169 */ 55, 63, 209, 91, 149, 188, 207, 205, 144, 135,
- /* 170 - 179 */ 151, 178, 220, 252, 190, 97, 242, 86, 211, 171,
- /* 180 - 189 */ 20, 42, 93, 158, 132, 60, 57, 83, 71, 109,
- /* 190 - 199 */ 65, 162, 31, 45, 67, 216, 183, 123, 164, 118,
- /* 200 - 209 */ 196, 23, 73, 236, 127, 12, 111, 246, 108, 161,
- /* 210 - 219 */ 59, 82, 41, 157, 85, 170, 251, 96, 134, 177,
- /* 220 - 229 */ 187, 204, 62, 90, 203, 89, 95, 176, 156, 169,
- /* 230 - 239 */ 160, 81, 11, 245, 22, 235, 122, 117, 44, 215,
- /* 240 - 249 */ 79, 174, 213, 233, 230, 231, 173, 232, 116, 214,
- /* 250 - 255 */ 244, 234, 168, 80, 88, 175}
-)
-
-// gfElement is an element in GF(2^8).
-type gfElement uint8
-
-// newGFElement creates and returns a new gfElement.
-func newGFElement(data byte) gfElement {
- return gfElement(data)
-}
-
-// gfAdd returns a + b.
-func gfAdd(a, b gfElement) gfElement {
- return a ^ b
-}
-
-// gfSub returns a - b.
-//
-// Note addition is equivalent to subtraction in GF(2).
-func gfSub(a, b gfElement) gfElement {
- return a ^ b
-}
-
-// gfMultiply returns a * b.
-func gfMultiply(a, b gfElement) gfElement {
- if a == gfZero || b == gfZero {
- return gfZero
- }
-
- return gfExpTable[(gfLogTable[a]+gfLogTable[b])%255]
-}
-
-// gfDivide returns a / b.
-//
-// Divide by zero results in a panic.
-func gfDivide(a, b gfElement) gfElement {
- if a == gfZero {
- return gfZero
- } else if b == gfZero {
- log.Panicln("Divide by zero")
- }
-
- return gfMultiply(a, gfInverse(b))
-}
-
-// gfInverse returns the multiplicative inverse of a, a^-1.
-//
-// a * a^-1 = 1
-func gfInverse(a gfElement) gfElement {
- if a == gfZero {
- log.Panicln("No multiplicative inverse of 0")
- }
-
- return gfExpTable[255-gfLogTable[a]]
-}
-
-// a^i | bits | polynomial | decimal
-// --------------------------------------------------------------------------
-// 0 | 000000000 | 0x^8 0x^7 0x^6 0x^5 0x^4 0x^3 0x^2 0x^1 0x^0 | 0
-// a^0 | 000000001 | 0x^8 0x^7 0x^6 0x^5 0x^4 0x^3 0x^2 0x^1 1x^0 | 1
-// a^1 | 000000010 | 0x^8 0x^7 0x^6 0x^5 0x^4 0x^3 0x^2 1x^1 0x^0 | 2
-// a^2 | 000000100 | 0x^8 0x^7 0x^6 0x^5 0x^4 0x^3 1x^2 0x^1 0x^0 | 4
-// a^3 | 000001000 | 0x^8 0x^7 0x^6 0x^5 0x^4 1x^3 0x^2 0x^1 0x^0 | 8
-// a^4 | 000010000 | 0x^8 0x^7 0x^6 0x^5 1x^4 0x^3 0x^2 0x^1 0x^0 | 16
-// a^5 | 000100000 | 0x^8 0x^7 0x^6 1x^5 0x^4 0x^3 0x^2 0x^1 0x^0 | 32
-// a^6 | 001000000 | 0x^8 0x^7 1x^6 0x^5 0x^4 0x^3 0x^2 0x^1 0x^0 | 64
-// a^7 | 010000000 | 0x^8 1x^7 0x^6 0x^5 0x^4 0x^3 0x^2 0x^1 0x^0 | 128
-// a^8 | 000011101 | 0x^8 0x^7 0x^6 0x^5 1x^4 1x^3 1x^2 0x^1 1x^0 | 29
-// a^9 | 000111010 | 0x^8 0x^7 0x^6 1x^5 1x^4 1x^3 0x^2 1x^1 0x^0 | 58
-// a^10 | 001110100 | 0x^8 0x^7 1x^6 1x^5 1x^4 0x^3 1x^2 0x^1 0x^0 | 116
-// a^11 | 011101000 | 0x^8 1x^7 1x^6 1x^5 0x^4 1x^3 0x^2 0x^1 0x^0 | 232
-// a^12 | 011001101 | 0x^8 1x^7 1x^6 0x^5 0x^4 1x^3 1x^2 0x^1 1x^0 | 205
-// a^13 | 010000111 | 0x^8 1x^7 0x^6 0x^5 0x^4 0x^3 1x^2 1x^1 1x^0 | 135
-// a^14 | 000010011 | 0x^8 0x^7 0x^6 0x^5 1x^4 0x^3 0x^2 1x^1 1x^0 | 19
-// a^15 | 000100110 | 0x^8 0x^7 0x^6 1x^5 0x^4 0x^3 1x^2 1x^1 0x^0 | 38
-// a^16 | 001001100 | 0x^8 0x^7 1x^6 0x^5 0x^4 1x^3 1x^2 0x^1 0x^0 | 76
-// a^17 | 010011000 | 0x^8 1x^7 0x^6 0x^5 1x^4 1x^3 0x^2 0x^1 0x^0 | 152
-// a^18 | 000101101 | 0x^8 0x^7 0x^6 1x^5 0x^4 1x^3 1x^2 0x^1 1x^0 | 45
-// a^19 | 001011010 | 0x^8 0x^7 1x^6 0x^5 1x^4 1x^3 0x^2 1x^1 0x^0 | 90
-// a^20 | 010110100 | 0x^8 1x^7 0x^6 1x^5 1x^4 0x^3 1x^2 0x^1 0x^0 | 180
-// a^21 | 001110101 | 0x^8 0x^7 1x^6 1x^5 1x^4 0x^3 1x^2 0x^1 1x^0 | 117
-// a^22 | 011101010 | 0x^8 1x^7 1x^6 1x^5 0x^4 1x^3 0x^2 1x^1 0x^0 | 234
-// a^23 | 011001001 | 0x^8 1x^7 1x^6 0x^5 0x^4 1x^3 0x^2 0x^1 1x^0 | 201
-// a^24 | 010001111 | 0x^8 1x^7 0x^6 0x^5 0x^4 1x^3 1x^2 1x^1 1x^0 | 143
-// a^25 | 000000011 | 0x^8 0x^7 0x^6 0x^5 0x^4 0x^3 0x^2 1x^1 1x^0 | 3
-// a^26 | 000000110 | 0x^8 0x^7 0x^6 0x^5 0x^4 0x^3 1x^2 1x^1 0x^0 | 6
-// a^27 | 000001100 | 0x^8 0x^7 0x^6 0x^5 0x^4 1x^3 1x^2 0x^1 0x^0 | 12
-// a^28 | 000011000 | 0x^8 0x^7 0x^6 0x^5 1x^4 1x^3 0x^2 0x^1 0x^0 | 24
-// a^29 | 000110000 | 0x^8 0x^7 0x^6 1x^5 1x^4 0x^3 0x^2 0x^1 0x^0 | 48
-// a^30 | 001100000 | 0x^8 0x^7 1x^6 1x^5 0x^4 0x^3 0x^2 0x^1 0x^0 | 96
-// a^31 | 011000000 | 0x^8 1x^7 1x^6 0x^5 0x^4 0x^3 0x^2 0x^1 0x^0 | 192
-// a^32 | 010011101 | 0x^8 1x^7 0x^6 0x^5 1x^4 1x^3 1x^2 0x^1 1x^0 | 157
-// a^33 | 000100111 | 0x^8 0x^7 0x^6 1x^5 0x^4 0x^3 1x^2 1x^1 1x^0 | 39
-// a^34 | 001001110 | 0x^8 0x^7 1x^6 0x^5 0x^4 1x^3 1x^2 1x^1 0x^0 | 78
-// a^35 | 010011100 | 0x^8 1x^7 0x^6 0x^5 1x^4 1x^3 1x^2 0x^1 0x^0 | 156
-// a^36 | 000100101 | 0x^8 0x^7 0x^6 1x^5 0x^4 0x^3 1x^2 0x^1 1x^0 | 37
-// a^37 | 001001010 | 0x^8 0x^7 1x^6 0x^5 0x^4 1x^3 0x^2 1x^1 0x^0 | 74
-// a^38 | 010010100 | 0x^8 1x^7 0x^6 0x^5 1x^4 0x^3 1x^2 0x^1 0x^0 | 148
-// a^39 | 000110101 | 0x^8 0x^7 0x^6 1x^5 1x^4 0x^3 1x^2 0x^1 1x^0 | 53
-// a^40 | 001101010 | 0x^8 0x^7 1x^6 1x^5 0x^4 1x^3 0x^2 1x^1 0x^0 | 106
-// a^41 | 011010100 | 0x^8 1x^7 1x^6 0x^5 1x^4 0x^3 1x^2 0x^1 0x^0 | 212
-// a^42 | 010110101 | 0x^8 1x^7 0x^6 1x^5 1x^4 0x^3 1x^2 0x^1 1x^0 | 181
-// a^43 | 001110111 | 0x^8 0x^7 1x^6 1x^5 1x^4 0x^3 1x^2 1x^1 1x^0 | 119
-// a^44 | 011101110 | 0x^8 1x^7 1x^6 1x^5 0x^4 1x^3 1x^2 1x^1 0x^0 | 238
-// a^45 | 011000001 | 0x^8 1x^7 1x^6 0x^5 0x^4 0x^3 0x^2 0x^1 1x^0 | 193
-// a^46 | 010011111 | 0x^8 1x^7 0x^6 0x^5 1x^4 1x^3 1x^2 1x^1 1x^0 | 159
-// a^47 | 000100011 | 0x^8 0x^7 0x^6 1x^5 0x^4 0x^3 0x^2 1x^1 1x^0 | 35
-// a^48 | 001000110 | 0x^8 0x^7 1x^6 0x^5 0x^4 0x^3 1x^2 1x^1 0x^0 | 70
-// a^49 | 010001100 | 0x^8 1x^7 0x^6 0x^5 0x^4 1x^3 1x^2 0x^1 0x^0 | 140
-// a^50 | 000000101 | 0x^8 0x^7 0x^6 0x^5 0x^4 0x^3 1x^2 0x^1 1x^0 | 5
-// a^51 | 000001010 | 0x^8 0x^7 0x^6 0x^5 0x^4 1x^3 0x^2 1x^1 0x^0 | 10
-// a^52 | 000010100 | 0x^8 0x^7 0x^6 0x^5 1x^4 0x^3 1x^2 0x^1 0x^0 | 20
-// a^53 | 000101000 | 0x^8 0x^7 0x^6 1x^5 0x^4 1x^3 0x^2 0x^1 0x^0 | 40
-// a^54 | 001010000 | 0x^8 0x^7 1x^6 0x^5 1x^4 0x^3 0x^2 0x^1 0x^0 | 80
-// a^55 | 010100000 | 0x^8 1x^7 0x^6 1x^5 0x^4 0x^3 0x^2 0x^1 0x^0 | 160
-// a^56 | 001011101 | 0x^8 0x^7 1x^6 0x^5 1x^4 1x^3 1x^2 0x^1 1x^0 | 93
-// a^57 | 010111010 | 0x^8 1x^7 0x^6 1x^5 1x^4 1x^3 0x^2 1x^1 0x^0 | 186
-// a^58 | 001101001 | 0x^8 0x^7 1x^6 1x^5 0x^4 1x^3 0x^2 0x^1 1x^0 | 105
-// a^59 | 011010010 | 0x^8 1x^7 1x^6 0x^5 1x^4 0x^3 0x^2 1x^1 0x^0 | 210
-// a^60 | 010111001 | 0x^8 1x^7 0x^6 1x^5 1x^4 1x^3 0x^2 0x^1 1x^0 | 185
-// a^61 | 001101111 | 0x^8 0x^7 1x^6 1x^5 0x^4 1x^3 1x^2 1x^1 1x^0 | 111
-// a^62 | 011011110 | 0x^8 1x^7 1x^6 0x^5 1x^4 1x^3 1x^2 1x^1 0x^0 | 222
-// a^63 | 010100001 | 0x^8 1x^7 0x^6 1x^5 0x^4 0x^3 0x^2 0x^1 1x^0 | 161
-// a^64 | 001011111 | 0x^8 0x^7 1x^6 0x^5 1x^4 1x^3 1x^2 1x^1 1x^0 | 95
-// a^65 | 010111110 | 0x^8 1x^7 0x^6 1x^5 1x^4 1x^3 1x^2 1x^1 0x^0 | 190
-// a^66 | 001100001 | 0x^8 0x^7 1x^6 1x^5 0x^4 0x^3 0x^2 0x^1 1x^0 | 97
-// a^67 | 011000010 | 0x^8 1x^7 1x^6 0x^5 0x^4 0x^3 0x^2 1x^1 0x^0 | 194
-// a^68 | 010011001 | 0x^8 1x^7 0x^6 0x^5 1x^4 1x^3 0x^2 0x^1 1x^0 | 153
-// a^69 | 000101111 | 0x^8 0x^7 0x^6 1x^5 0x^4 1x^3 1x^2 1x^1 1x^0 | 47
-// a^70 | 001011110 | 0x^8 0x^7 1x^6 0x^5 1x^4 1x^3 1x^2 1x^1 0x^0 | 94
-// a^71 | 010111100 | 0x^8 1x^7 0x^6 1x^5 1x^4 1x^3 1x^2 0x^1 0x^0 | 188
-// a^72 | 001100101 | 0x^8 0x^7 1x^6 1x^5 0x^4 0x^3 1x^2 0x^1 1x^0 | 101
-// a^73 | 011001010 | 0x^8 1x^7 1x^6 0x^5 0x^4 1x^3 0x^2 1x^1 0x^0 | 202
-// a^74 | 010001001 | 0x^8 1x^7 0x^6 0x^5 0x^4 1x^3 0x^2 0x^1 1x^0 | 137
-// a^75 | 000001111 | 0x^8 0x^7 0x^6 0x^5 0x^4 1x^3 1x^2 1x^1 1x^0 | 15
-// a^76 | 000011110 | 0x^8 0x^7 0x^6 0x^5 1x^4 1x^3 1x^2 1x^1 0x^0 | 30
-// a^77 | 000111100 | 0x^8 0x^7 0x^6 1x^5 1x^4 1x^3 1x^2 0x^1 0x^0 | 60
-// a^78 | 001111000 | 0x^8 0x^7 1x^6 1x^5 1x^4 1x^3 0x^2 0x^1 0x^0 | 120
-// a^79 | 011110000 | 0x^8 1x^7 1x^6 1x^5 1x^4 0x^3 0x^2 0x^1 0x^0 | 240
-// a^80 | 011111101 | 0x^8 1x^7 1x^6 1x^5 1x^4 1x^3 1x^2 0x^1 1x^0 | 253
-// a^81 | 011100111 | 0x^8 1x^7 1x^6 1x^5 0x^4 0x^3 1x^2 1x^1 1x^0 | 231
-// a^82 | 011010011 | 0x^8 1x^7 1x^6 0x^5 1x^4 0x^3 0x^2 1x^1 1x^0 | 211
-// a^83 | 010111011 | 0x^8 1x^7 0x^6 1x^5 1x^4 1x^3 0x^2 1x^1 1x^0 | 187
-// a^84 | 001101011 | 0x^8 0x^7 1x^6 1x^5 0x^4 1x^3 0x^2 1x^1 1x^0 | 107
-// a^85 | 011010110 | 0x^8 1x^7 1x^6 0x^5 1x^4 0x^3 1x^2 1x^1 0x^0 | 214
-// a^86 | 010110001 | 0x^8 1x^7 0x^6 1x^5 1x^4 0x^3 0x^2 0x^1 1x^0 | 177
-// a^87 | 001111111 | 0x^8 0x^7 1x^6 1x^5 1x^4 1x^3 1x^2 1x^1 1x^0 | 127
-// a^88 | 011111110 | 0x^8 1x^7 1x^6 1x^5 1x^4 1x^3 1x^2 1x^1 0x^0 | 254
-// a^89 | 011100001 | 0x^8 1x^7 1x^6 1x^5 0x^4 0x^3 0x^2 0x^1 1x^0 | 225
-// a^90 | 011011111 | 0x^8 1x^7 1x^6 0x^5 1x^4 1x^3 1x^2 1x^1 1x^0 | 223
-// a^91 | 010100011 | 0x^8 1x^7 0x^6 1x^5 0x^4 0x^3 0x^2 1x^1 1x^0 | 163
-// a^92 | 001011011 | 0x^8 0x^7 1x^6 0x^5 1x^4 1x^3 0x^2 1x^1 1x^0 | 91
-// a^93 | 010110110 | 0x^8 1x^7 0x^6 1x^5 1x^4 0x^3 1x^2 1x^1 0x^0 | 182
-// a^94 | 001110001 | 0x^8 0x^7 1x^6 1x^5 1x^4 0x^3 0x^2 0x^1 1x^0 | 113
-// a^95 | 011100010 | 0x^8 1x^7 1x^6 1x^5 0x^4 0x^3 0x^2 1x^1 0x^0 | 226
-// a^96 | 011011001 | 0x^8 1x^7 1x^6 0x^5 1x^4 1x^3 0x^2 0x^1 1x^0 | 217
-// a^97 | 010101111 | 0x^8 1x^7 0x^6 1x^5 0x^4 1x^3 1x^2 1x^1 1x^0 | 175
-// a^98 | 001000011 | 0x^8 0x^7 1x^6 0x^5 0x^4 0x^3 0x^2 1x^1 1x^0 | 67
-// a^99 | 010000110 | 0x^8 1x^7 0x^6 0x^5 0x^4 0x^3 1x^2 1x^1 0x^0 | 134
-// a^100 | 000010001 | 0x^8 0x^7 0x^6 0x^5 1x^4 0x^3 0x^2 0x^1 1x^0 | 17
-// a^101 | 000100010 | 0x^8 0x^7 0x^6 1x^5 0x^4 0x^3 0x^2 1x^1 0x^0 | 34
-// a^102 | 001000100 | 0x^8 0x^7 1x^6 0x^5 0x^4 0x^3 1x^2 0x^1 0x^0 | 68
-// a^103 | 010001000 | 0x^8 1x^7 0x^6 0x^5 0x^4 1x^3 0x^2 0x^1 0x^0 | 136
-// a^104 | 000001101 | 0x^8 0x^7 0x^6 0x^5 0x^4 1x^3 1x^2 0x^1 1x^0 | 13
-// a^105 | 000011010 | 0x^8 0x^7 0x^6 0x^5 1x^4 1x^3 0x^2 1x^1 0x^0 | 26
-// a^106 | 000110100 | 0x^8 0x^7 0x^6 1x^5 1x^4 0x^3 1x^2 0x^1 0x^0 | 52
-// a^107 | 001101000 | 0x^8 0x^7 1x^6 1x^5 0x^4 1x^3 0x^2 0x^1 0x^0 | 104
-// a^108 | 011010000 | 0x^8 1x^7 1x^6 0x^5 1x^4 0x^3 0x^2 0x^1 0x^0 | 208
-// a^109 | 010111101 | 0x^8 1x^7 0x^6 1x^5 1x^4 1x^3 1x^2 0x^1 1x^0 | 189
-// a^110 | 001100111 | 0x^8 0x^7 1x^6 1x^5 0x^4 0x^3 1x^2 1x^1 1x^0 | 103
-// a^111 | 011001110 | 0x^8 1x^7 1x^6 0x^5 0x^4 1x^3 1x^2 1x^1 0x^0 | 206
-// a^112 | 010000001 | 0x^8 1x^7 0x^6 0x^5 0x^4 0x^3 0x^2 0x^1 1x^0 | 129
-// a^113 | 000011111 | 0x^8 0x^7 0x^6 0x^5 1x^4 1x^3 1x^2 1x^1 1x^0 | 31
-// a^114 | 000111110 | 0x^8 0x^7 0x^6 1x^5 1x^4 1x^3 1x^2 1x^1 0x^0 | 62
-// a^115 | 001111100 | 0x^8 0x^7 1x^6 1x^5 1x^4 1x^3 1x^2 0x^1 0x^0 | 124
-// a^116 | 011111000 | 0x^8 1x^7 1x^6 1x^5 1x^4 1x^3 0x^2 0x^1 0x^0 | 248
-// a^117 | 011101101 | 0x^8 1x^7 1x^6 1x^5 0x^4 1x^3 1x^2 0x^1 1x^0 | 237
-// a^118 | 011000111 | 0x^8 1x^7 1x^6 0x^5 0x^4 0x^3 1x^2 1x^1 1x^0 | 199
-// a^119 | 010010011 | 0x^8 1x^7 0x^6 0x^5 1x^4 0x^3 0x^2 1x^1 1x^0 | 147
-// a^120 | 000111011 | 0x^8 0x^7 0x^6 1x^5 1x^4 1x^3 0x^2 1x^1 1x^0 | 59
-// a^121 | 001110110 | 0x^8 0x^7 1x^6 1x^5 1x^4 0x^3 1x^2 1x^1 0x^0 | 118
-// a^122 | 011101100 | 0x^8 1x^7 1x^6 1x^5 0x^4 1x^3 1x^2 0x^1 0x^0 | 236
-// a^123 | 011000101 | 0x^8 1x^7 1x^6 0x^5 0x^4 0x^3 1x^2 0x^1 1x^0 | 197
-// a^124 | 010010111 | 0x^8 1x^7 0x^6 0x^5 1x^4 0x^3 1x^2 1x^1 1x^0 | 151
-// a^125 | 000110011 | 0x^8 0x^7 0x^6 1x^5 1x^4 0x^3 0x^2 1x^1 1x^0 | 51
-// a^126 | 001100110 | 0x^8 0x^7 1x^6 1x^5 0x^4 0x^3 1x^2 1x^1 0x^0 | 102
-// a^127 | 011001100 | 0x^8 1x^7 1x^6 0x^5 0x^4 1x^3 1x^2 0x^1 0x^0 | 204
-// a^128 | 010000101 | 0x^8 1x^7 0x^6 0x^5 0x^4 0x^3 1x^2 0x^1 1x^0 | 133
-// a^129 | 000010111 | 0x^8 0x^7 0x^6 0x^5 1x^4 0x^3 1x^2 1x^1 1x^0 | 23
-// a^130 | 000101110 | 0x^8 0x^7 0x^6 1x^5 0x^4 1x^3 1x^2 1x^1 0x^0 | 46
-// a^131 | 001011100 | 0x^8 0x^7 1x^6 0x^5 1x^4 1x^3 1x^2 0x^1 0x^0 | 92
-// a^132 | 010111000 | 0x^8 1x^7 0x^6 1x^5 1x^4 1x^3 0x^2 0x^1 0x^0 | 184
-// a^133 | 001101101 | 0x^8 0x^7 1x^6 1x^5 0x^4 1x^3 1x^2 0x^1 1x^0 | 109
-// a^134 | 011011010 | 0x^8 1x^7 1x^6 0x^5 1x^4 1x^3 0x^2 1x^1 0x^0 | 218
-// a^135 | 010101001 | 0x^8 1x^7 0x^6 1x^5 0x^4 1x^3 0x^2 0x^1 1x^0 | 169
-// a^136 | 001001111 | 0x^8 0x^7 1x^6 0x^5 0x^4 1x^3 1x^2 1x^1 1x^0 | 79
-// a^137 | 010011110 | 0x^8 1x^7 0x^6 0x^5 1x^4 1x^3 1x^2 1x^1 0x^0 | 158
-// a^138 | 000100001 | 0x^8 0x^7 0x^6 1x^5 0x^4 0x^3 0x^2 0x^1 1x^0 | 33
-// a^139 | 001000010 | 0x^8 0x^7 1x^6 0x^5 0x^4 0x^3 0x^2 1x^1 0x^0 | 66
-// a^140 | 010000100 | 0x^8 1x^7 0x^6 0x^5 0x^4 0x^3 1x^2 0x^1 0x^0 | 132
-// a^141 | 000010101 | 0x^8 0x^7 0x^6 0x^5 1x^4 0x^3 1x^2 0x^1 1x^0 | 21
-// a^142 | 000101010 | 0x^8 0x^7 0x^6 1x^5 0x^4 1x^3 0x^2 1x^1 0x^0 | 42
-// a^143 | 001010100 | 0x^8 0x^7 1x^6 0x^5 1x^4 0x^3 1x^2 0x^1 0x^0 | 84
-// a^144 | 010101000 | 0x^8 1x^7 0x^6 1x^5 0x^4 1x^3 0x^2 0x^1 0x^0 | 168
-// a^145 | 001001101 | 0x^8 0x^7 1x^6 0x^5 0x^4 1x^3 1x^2 0x^1 1x^0 | 77
-// a^146 | 010011010 | 0x^8 1x^7 0x^6 0x^5 1x^4 1x^3 0x^2 1x^1 0x^0 | 154
-// a^147 | 000101001 | 0x^8 0x^7 0x^6 1x^5 0x^4 1x^3 0x^2 0x^1 1x^0 | 41
-// a^148 | 001010010 | 0x^8 0x^7 1x^6 0x^5 1x^4 0x^3 0x^2 1x^1 0x^0 | 82
-// a^149 | 010100100 | 0x^8 1x^7 0x^6 1x^5 0x^4 0x^3 1x^2 0x^1 0x^0 | 164
-// a^150 | 001010101 | 0x^8 0x^7 1x^6 0x^5 1x^4 0x^3 1x^2 0x^1 1x^0 | 85
-// a^151 | 010101010 | 0x^8 1x^7 0x^6 1x^5 0x^4 1x^3 0x^2 1x^1 0x^0 | 170
-// a^152 | 001001001 | 0x^8 0x^7 1x^6 0x^5 0x^4 1x^3 0x^2 0x^1 1x^0 | 73
-// a^153 | 010010010 | 0x^8 1x^7 0x^6 0x^5 1x^4 0x^3 0x^2 1x^1 0x^0 | 146
-// a^154 | 000111001 | 0x^8 0x^7 0x^6 1x^5 1x^4 1x^3 0x^2 0x^1 1x^0 | 57
-// a^155 | 001110010 | 0x^8 0x^7 1x^6 1x^5 1x^4 0x^3 0x^2 1x^1 0x^0 | 114
-// a^156 | 011100100 | 0x^8 1x^7 1x^6 1x^5 0x^4 0x^3 1x^2 0x^1 0x^0 | 228
-// a^157 | 011010101 | 0x^8 1x^7 1x^6 0x^5 1x^4 0x^3 1x^2 0x^1 1x^0 | 213
-// a^158 | 010110111 | 0x^8 1x^7 0x^6 1x^5 1x^4 0x^3 1x^2 1x^1 1x^0 | 183
-// a^159 | 001110011 | 0x^8 0x^7 1x^6 1x^5 1x^4 0x^3 0x^2 1x^1 1x^0 | 115
-// a^160 | 011100110 | 0x^8 1x^7 1x^6 1x^5 0x^4 0x^3 1x^2 1x^1 0x^0 | 230
-// a^161 | 011010001 | 0x^8 1x^7 1x^6 0x^5 1x^4 0x^3 0x^2 0x^1 1x^0 | 209
-// a^162 | 010111111 | 0x^8 1x^7 0x^6 1x^5 1x^4 1x^3 1x^2 1x^1 1x^0 | 191
-// a^163 | 001100011 | 0x^8 0x^7 1x^6 1x^5 0x^4 0x^3 0x^2 1x^1 1x^0 | 99
-// a^164 | 011000110 | 0x^8 1x^7 1x^6 0x^5 0x^4 0x^3 1x^2 1x^1 0x^0 | 198
-// a^165 | 010010001 | 0x^8 1x^7 0x^6 0x^5 1x^4 0x^3 0x^2 0x^1 1x^0 | 145
-// a^166 | 000111111 | 0x^8 0x^7 0x^6 1x^5 1x^4 1x^3 1x^2 1x^1 1x^0 | 63
-// a^167 | 001111110 | 0x^8 0x^7 1x^6 1x^5 1x^4 1x^3 1x^2 1x^1 0x^0 | 126
-// a^168 | 011111100 | 0x^8 1x^7 1x^6 1x^5 1x^4 1x^3 1x^2 0x^1 0x^0 | 252
-// a^169 | 011100101 | 0x^8 1x^7 1x^6 1x^5 0x^4 0x^3 1x^2 0x^1 1x^0 | 229
-// a^170 | 011010111 | 0x^8 1x^7 1x^6 0x^5 1x^4 0x^3 1x^2 1x^1 1x^0 | 215
-// a^171 | 010110011 | 0x^8 1x^7 0x^6 1x^5 1x^4 0x^3 0x^2 1x^1 1x^0 | 179
-// a^172 | 001111011 | 0x^8 0x^7 1x^6 1x^5 1x^4 1x^3 0x^2 1x^1 1x^0 | 123
-// a^173 | 011110110 | 0x^8 1x^7 1x^6 1x^5 1x^4 0x^3 1x^2 1x^1 0x^0 | 246
-// a^174 | 011110001 | 0x^8 1x^7 1x^6 1x^5 1x^4 0x^3 0x^2 0x^1 1x^0 | 241
-// a^175 | 011111111 | 0x^8 1x^7 1x^6 1x^5 1x^4 1x^3 1x^2 1x^1 1x^0 | 255
-// a^176 | 011100011 | 0x^8 1x^7 1x^6 1x^5 0x^4 0x^3 0x^2 1x^1 1x^0 | 227
-// a^177 | 011011011 | 0x^8 1x^7 1x^6 0x^5 1x^4 1x^3 0x^2 1x^1 1x^0 | 219
-// a^178 | 010101011 | 0x^8 1x^7 0x^6 1x^5 0x^4 1x^3 0x^2 1x^1 1x^0 | 171
-// a^179 | 001001011 | 0x^8 0x^7 1x^6 0x^5 0x^4 1x^3 0x^2 1x^1 1x^0 | 75
-// a^180 | 010010110 | 0x^8 1x^7 0x^6 0x^5 1x^4 0x^3 1x^2 1x^1 0x^0 | 150
-// a^181 | 000110001 | 0x^8 0x^7 0x^6 1x^5 1x^4 0x^3 0x^2 0x^1 1x^0 | 49
-// a^182 | 001100010 | 0x^8 0x^7 1x^6 1x^5 0x^4 0x^3 0x^2 1x^1 0x^0 | 98
-// a^183 | 011000100 | 0x^8 1x^7 1x^6 0x^5 0x^4 0x^3 1x^2 0x^1 0x^0 | 196
-// a^184 | 010010101 | 0x^8 1x^7 0x^6 0x^5 1x^4 0x^3 1x^2 0x^1 1x^0 | 149
-// a^185 | 000110111 | 0x^8 0x^7 0x^6 1x^5 1x^4 0x^3 1x^2 1x^1 1x^0 | 55
-// a^186 | 001101110 | 0x^8 0x^7 1x^6 1x^5 0x^4 1x^3 1x^2 1x^1 0x^0 | 110
-// a^187 | 011011100 | 0x^8 1x^7 1x^6 0x^5 1x^4 1x^3 1x^2 0x^1 0x^0 | 220
-// a^188 | 010100101 | 0x^8 1x^7 0x^6 1x^5 0x^4 0x^3 1x^2 0x^1 1x^0 | 165
-// a^189 | 001010111 | 0x^8 0x^7 1x^6 0x^5 1x^4 0x^3 1x^2 1x^1 1x^0 | 87
-// a^190 | 010101110 | 0x^8 1x^7 0x^6 1x^5 0x^4 1x^3 1x^2 1x^1 0x^0 | 174
-// a^191 | 001000001 | 0x^8 0x^7 1x^6 0x^5 0x^4 0x^3 0x^2 0x^1 1x^0 | 65
-// a^192 | 010000010 | 0x^8 1x^7 0x^6 0x^5 0x^4 0x^3 0x^2 1x^1 0x^0 | 130
-// a^193 | 000011001 | 0x^8 0x^7 0x^6 0x^5 1x^4 1x^3 0x^2 0x^1 1x^0 | 25
-// a^194 | 000110010 | 0x^8 0x^7 0x^6 1x^5 1x^4 0x^3 0x^2 1x^1 0x^0 | 50
-// a^195 | 001100100 | 0x^8 0x^7 1x^6 1x^5 0x^4 0x^3 1x^2 0x^1 0x^0 | 100
-// a^196 | 011001000 | 0x^8 1x^7 1x^6 0x^5 0x^4 1x^3 0x^2 0x^1 0x^0 | 200
-// a^197 | 010001101 | 0x^8 1x^7 0x^6 0x^5 0x^4 1x^3 1x^2 0x^1 1x^0 | 141
-// a^198 | 000000111 | 0x^8 0x^7 0x^6 0x^5 0x^4 0x^3 1x^2 1x^1 1x^0 | 7
-// a^199 | 000001110 | 0x^8 0x^7 0x^6 0x^5 0x^4 1x^3 1x^2 1x^1 0x^0 | 14
-// a^200 | 000011100 | 0x^8 0x^7 0x^6 0x^5 1x^4 1x^3 1x^2 0x^1 0x^0 | 28
-// a^201 | 000111000 | 0x^8 0x^7 0x^6 1x^5 1x^4 1x^3 0x^2 0x^1 0x^0 | 56
-// a^202 | 001110000 | 0x^8 0x^7 1x^6 1x^5 1x^4 0x^3 0x^2 0x^1 0x^0 | 112
-// a^203 | 011100000 | 0x^8 1x^7 1x^6 1x^5 0x^4 0x^3 0x^2 0x^1 0x^0 | 224
-// a^204 | 011011101 | 0x^8 1x^7 1x^6 0x^5 1x^4 1x^3 1x^2 0x^1 1x^0 | 221
-// a^205 | 010100111 | 0x^8 1x^7 0x^6 1x^5 0x^4 0x^3 1x^2 1x^1 1x^0 | 167
-// a^206 | 001010011 | 0x^8 0x^7 1x^6 0x^5 1x^4 0x^3 0x^2 1x^1 1x^0 | 83
-// a^207 | 010100110 | 0x^8 1x^7 0x^6 1x^5 0x^4 0x^3 1x^2 1x^1 0x^0 | 166
-// a^208 | 001010001 | 0x^8 0x^7 1x^6 0x^5 1x^4 0x^3 0x^2 0x^1 1x^0 | 81
-// a^209 | 010100010 | 0x^8 1x^7 0x^6 1x^5 0x^4 0x^3 0x^2 1x^1 0x^0 | 162
-// a^210 | 001011001 | 0x^8 0x^7 1x^6 0x^5 1x^4 1x^3 0x^2 0x^1 1x^0 | 89
-// a^211 | 010110010 | 0x^8 1x^7 0x^6 1x^5 1x^4 0x^3 0x^2 1x^1 0x^0 | 178
-// a^212 | 001111001 | 0x^8 0x^7 1x^6 1x^5 1x^4 1x^3 0x^2 0x^1 1x^0 | 121
-// a^213 | 011110010 | 0x^8 1x^7 1x^6 1x^5 1x^4 0x^3 0x^2 1x^1 0x^0 | 242
-// a^214 | 011111001 | 0x^8 1x^7 1x^6 1x^5 1x^4 1x^3 0x^2 0x^1 1x^0 | 249
-// a^215 | 011101111 | 0x^8 1x^7 1x^6 1x^5 0x^4 1x^3 1x^2 1x^1 1x^0 | 239
-// a^216 | 011000011 | 0x^8 1x^7 1x^6 0x^5 0x^4 0x^3 0x^2 1x^1 1x^0 | 195
-// a^217 | 010011011 | 0x^8 1x^7 0x^6 0x^5 1x^4 1x^3 0x^2 1x^1 1x^0 | 155
-// a^218 | 000101011 | 0x^8 0x^7 0x^6 1x^5 0x^4 1x^3 0x^2 1x^1 1x^0 | 43
-// a^219 | 001010110 | 0x^8 0x^7 1x^6 0x^5 1x^4 0x^3 1x^2 1x^1 0x^0 | 86
-// a^220 | 010101100 | 0x^8 1x^7 0x^6 1x^5 0x^4 1x^3 1x^2 0x^1 0x^0 | 172
-// a^221 | 001000101 | 0x^8 0x^7 1x^6 0x^5 0x^4 0x^3 1x^2 0x^1 1x^0 | 69
-// a^222 | 010001010 | 0x^8 1x^7 0x^6 0x^5 0x^4 1x^3 0x^2 1x^1 0x^0 | 138
-// a^223 | 000001001 | 0x^8 0x^7 0x^6 0x^5 0x^4 1x^3 0x^2 0x^1 1x^0 | 9
-// a^224 | 000010010 | 0x^8 0x^7 0x^6 0x^5 1x^4 0x^3 0x^2 1x^1 0x^0 | 18
-// a^225 | 000100100 | 0x^8 0x^7 0x^6 1x^5 0x^4 0x^3 1x^2 0x^1 0x^0 | 36
-// a^226 | 001001000 | 0x^8 0x^7 1x^6 0x^5 0x^4 1x^3 0x^2 0x^1 0x^0 | 72
-// a^227 | 010010000 | 0x^8 1x^7 0x^6 0x^5 1x^4 0x^3 0x^2 0x^1 0x^0 | 144
-// a^228 | 000111101 | 0x^8 0x^7 0x^6 1x^5 1x^4 1x^3 1x^2 0x^1 1x^0 | 61
-// a^229 | 001111010 | 0x^8 0x^7 1x^6 1x^5 1x^4 1x^3 0x^2 1x^1 0x^0 | 122
-// a^230 | 011110100 | 0x^8 1x^7 1x^6 1x^5 1x^4 0x^3 1x^2 0x^1 0x^0 | 244
-// a^231 | 011110101 | 0x^8 1x^7 1x^6 1x^5 1x^4 0x^3 1x^2 0x^1 1x^0 | 245
-// a^232 | 011110111 | 0x^8 1x^7 1x^6 1x^5 1x^4 0x^3 1x^2 1x^1 1x^0 | 247
-// a^233 | 011110011 | 0x^8 1x^7 1x^6 1x^5 1x^4 0x^3 0x^2 1x^1 1x^0 | 243
-// a^234 | 011111011 | 0x^8 1x^7 1x^6 1x^5 1x^4 1x^3 0x^2 1x^1 1x^0 | 251
-// a^235 | 011101011 | 0x^8 1x^7 1x^6 1x^5 0x^4 1x^3 0x^2 1x^1 1x^0 | 235
-// a^236 | 011001011 | 0x^8 1x^7 1x^6 0x^5 0x^4 1x^3 0x^2 1x^1 1x^0 | 203
-// a^237 | 010001011 | 0x^8 1x^7 0x^6 0x^5 0x^4 1x^3 0x^2 1x^1 1x^0 | 139
-// a^238 | 000001011 | 0x^8 0x^7 0x^6 0x^5 0x^4 1x^3 0x^2 1x^1 1x^0 | 11
-// a^239 | 000010110 | 0x^8 0x^7 0x^6 0x^5 1x^4 0x^3 1x^2 1x^1 0x^0 | 22
-// a^240 | 000101100 | 0x^8 0x^7 0x^6 1x^5 0x^4 1x^3 1x^2 0x^1 0x^0 | 44
-// a^241 | 001011000 | 0x^8 0x^7 1x^6 0x^5 1x^4 1x^3 0x^2 0x^1 0x^0 | 88
-// a^242 | 010110000 | 0x^8 1x^7 0x^6 1x^5 1x^4 0x^3 0x^2 0x^1 0x^0 | 176
-// a^243 | 001111101 | 0x^8 0x^7 1x^6 1x^5 1x^4 1x^3 1x^2 0x^1 1x^0 | 125
-// a^244 | 011111010 | 0x^8 1x^7 1x^6 1x^5 1x^4 1x^3 0x^2 1x^1 0x^0 | 250
-// a^245 | 011101001 | 0x^8 1x^7 1x^6 1x^5 0x^4 1x^3 0x^2 0x^1 1x^0 | 233
-// a^246 | 011001111 | 0x^8 1x^7 1x^6 0x^5 0x^4 1x^3 1x^2 1x^1 1x^0 | 207
-// a^247 | 010000011 | 0x^8 1x^7 0x^6 0x^5 0x^4 0x^3 0x^2 1x^1 1x^0 | 131
-// a^248 | 000011011 | 0x^8 0x^7 0x^6 0x^5 1x^4 1x^3 0x^2 1x^1 1x^0 | 27
-// a^249 | 000110110 | 0x^8 0x^7 0x^6 1x^5 1x^4 0x^3 1x^2 1x^1 0x^0 | 54
-// a^250 | 001101100 | 0x^8 0x^7 1x^6 1x^5 0x^4 1x^3 1x^2 0x^1 0x^0 | 108
-// a^251 | 011011000 | 0x^8 1x^7 1x^6 0x^5 1x^4 1x^3 0x^2 0x^1 0x^0 | 216
-// a^252 | 010101101 | 0x^8 1x^7 0x^6 1x^5 0x^4 1x^3 1x^2 0x^1 1x^0 | 173
-// a^253 | 001000111 | 0x^8 0x^7 1x^6 0x^5 0x^4 0x^3 1x^2 1x^1 1x^0 | 71
-// a^254 | 010001110 | 0x^8 1x^7 0x^6 0x^5 0x^4 1x^3 1x^2 1x^1 0x^0 | 142
-// a^255 | 000000001 | 0x^8 0x^7 0x^6 0x^5 0x^4 0x^3 0x^2 0x^1 1x^0 | 1
diff --git a/vendor/github.com/skip2/go-qrcode/reedsolomon/gf_poly.go b/vendor/github.com/skip2/go-qrcode/reedsolomon/gf_poly.go
deleted file mode 100644
index 962f5454..00000000
--- a/vendor/github.com/skip2/go-qrcode/reedsolomon/gf_poly.go
+++ /dev/null
@@ -1,216 +0,0 @@
-// go-qrcode
-// Copyright 2014 Tom Harwood
-
-package reedsolomon
-
-import (
- "fmt"
- "log"
-
- bitset "github.com/skip2/go-qrcode/bitset"
-)
-
-// gfPoly is a polynomial over GF(2^8).
-type gfPoly struct {
- // The ith value is the coefficient of the ith degree of x.
- // term[0]*(x^0) + term[1]*(x^1) + term[2]*(x^2) ...
- term []gfElement
-}
-
-// newGFPolyFromData returns |data| as a polynomial over GF(2^8).
-//
-// Each data byte becomes the coefficient of an x term.
-//
-// For an n byte input the polynomial is:
-// data[n-1]*(x^n-1) + data[n-2]*(x^n-2) ... + data[0]*(x^0).
-func newGFPolyFromData(data *bitset.Bitset) gfPoly {
- numTotalBytes := data.Len() / 8
- if data.Len()%8 != 0 {
- numTotalBytes++
- }
-
- result := gfPoly{term: make([]gfElement, numTotalBytes)}
-
- i := numTotalBytes - 1
- for j := 0; j < data.Len(); j += 8 {
- result.term[i] = gfElement(data.ByteAt(j))
- i--
- }
-
- return result
-}
-
-// newGFPolyMonomial returns term*(x^degree).
-func newGFPolyMonomial(term gfElement, degree int) gfPoly {
- if term == gfZero {
- return gfPoly{}
- }
-
- result := gfPoly{term: make([]gfElement, degree+1)}
- result.term[degree] = term
-
- return result
-}
-
-func (e gfPoly) data(numTerms int) []byte {
- result := make([]byte, numTerms)
-
- i := numTerms - len(e.term)
- for j := len(e.term) - 1; j >= 0; j-- {
- result[i] = byte(e.term[j])
- i++
- }
-
- return result
-}
-
-// numTerms returns the number of
-func (e gfPoly) numTerms() int {
- return len(e.term)
-}
-
-// gfPolyMultiply returns a * b.
-func gfPolyMultiply(a, b gfPoly) gfPoly {
- numATerms := a.numTerms()
- numBTerms := b.numTerms()
-
- result := gfPoly{term: make([]gfElement, numATerms+numBTerms)}
-
- for i := 0; i < numATerms; i++ {
- for j := 0; j < numBTerms; j++ {
- if a.term[i] != 0 && b.term[j] != 0 {
- monomial := gfPoly{term: make([]gfElement, i+j+1)}
- monomial.term[i+j] = gfMultiply(a.term[i], b.term[j])
-
- result = gfPolyAdd(result, monomial)
- }
- }
- }
-
- return result.normalised()
-}
-
-// gfPolyRemainder return the remainder of numerator / denominator.
-func gfPolyRemainder(numerator, denominator gfPoly) gfPoly {
- if denominator.equals(gfPoly{}) {
- log.Panicln("Remainder by zero")
- }
-
- remainder := numerator
-
- for remainder.numTerms() >= denominator.numTerms() {
- degree := remainder.numTerms() - denominator.numTerms()
- coefficient := gfDivide(remainder.term[remainder.numTerms()-1],
- denominator.term[denominator.numTerms()-1])
-
- divisor := gfPolyMultiply(denominator,
- newGFPolyMonomial(coefficient, degree))
-
- remainder = gfPolyAdd(remainder, divisor)
- }
-
- return remainder.normalised()
-}
-
-// gfPolyAdd returns a + b.
-func gfPolyAdd(a, b gfPoly) gfPoly {
- numATerms := a.numTerms()
- numBTerms := b.numTerms()
-
- numTerms := numATerms
- if numBTerms > numTerms {
- numTerms = numBTerms
- }
-
- result := gfPoly{term: make([]gfElement, numTerms)}
-
- for i := 0; i < numTerms; i++ {
- switch {
- case numATerms > i && numBTerms > i:
- result.term[i] = gfAdd(a.term[i], b.term[i])
- case numATerms > i:
- result.term[i] = a.term[i]
- default:
- result.term[i] = b.term[i]
- }
- }
-
- return result.normalised()
-}
-
-func (e gfPoly) normalised() gfPoly {
- numTerms := e.numTerms()
- maxNonzeroTerm := numTerms - 1
-
- for i := numTerms - 1; i >= 0; i-- {
- if e.term[i] != 0 {
- break
- }
-
- maxNonzeroTerm = i - 1
- }
-
- if maxNonzeroTerm < 0 {
- return gfPoly{}
- } else if maxNonzeroTerm < numTerms-1 {
- e.term = e.term[0 : maxNonzeroTerm+1]
- }
-
- return e
-}
-
-func (e gfPoly) string(useIndexForm bool) string {
- var str string
- numTerms := e.numTerms()
-
- for i := numTerms - 1; i >= 0; i-- {
- if e.term[i] > 0 {
- if len(str) > 0 {
- str += " + "
- }
-
- if !useIndexForm {
- str += fmt.Sprintf("%dx^%d", e.term[i], i)
- } else {
- str += fmt.Sprintf("a^%dx^%d", gfLogTable[e.term[i]], i)
- }
- }
- }
-
- if len(str) == 0 {
- str = "0"
- }
-
- return str
-}
-
-// equals returns true if e == other.
-func (e gfPoly) equals(other gfPoly) bool {
- var minecPoly *gfPoly
- var maxecPoly *gfPoly
-
- if e.numTerms() > other.numTerms() {
- minecPoly = &other
- maxecPoly = &e
- } else {
- minecPoly = &e
- maxecPoly = &other
- }
-
- numMinTerms := minecPoly.numTerms()
- numMaxTerms := maxecPoly.numTerms()
-
- for i := 0; i < numMinTerms; i++ {
- if e.term[i] != other.term[i] {
- return false
- }
- }
-
- for i := numMinTerms; i < numMaxTerms; i++ {
- if maxecPoly.term[i] != 0 {
- return false
- }
- }
-
- return true
-}
diff --git a/vendor/github.com/skip2/go-qrcode/reedsolomon/reed_solomon.go b/vendor/github.com/skip2/go-qrcode/reedsolomon/reed_solomon.go
deleted file mode 100644
index 561697b4..00000000
--- a/vendor/github.com/skip2/go-qrcode/reedsolomon/reed_solomon.go
+++ /dev/null
@@ -1,73 +0,0 @@
-// go-qrcode
-// Copyright 2014 Tom Harwood
-
-// Package reedsolomon provides error correction encoding for QR Code 2005.
-//
-// QR Code 2005 uses a Reed-Solomon error correcting code to detect and correct
-// errors encountered during decoding.
-//
-// The generated RS codes are systematic, and consist of the input data with
-// error correction bytes appended.
-package reedsolomon
-
-import (
- "log"
-
- bitset "github.com/skip2/go-qrcode/bitset"
-)
-
-// Encode data for QR Code 2005 using the appropriate Reed-Solomon code.
-//
-// numECBytes is the number of error correction bytes to append, and is
-// determined by the target QR Code's version and error correction level.
-//
-// ISO/IEC 18004 table 9 specifies the numECBytes required. e.g. a 1-L code has
-// numECBytes=7.
-func Encode(data *bitset.Bitset, numECBytes int) *bitset.Bitset {
- // Create a polynomial representing |data|.
- //
- // The bytes are interpreted as the sequence of coefficients of a polynomial.
- // The last byte's value becomes the x^0 coefficient, the second to last
- // becomes the x^1 coefficient and so on.
- ecpoly := newGFPolyFromData(data)
- ecpoly = gfPolyMultiply(ecpoly, newGFPolyMonomial(gfOne, numECBytes))
-
- // Pick the generator polynomial.
- generator := rsGeneratorPoly(numECBytes)
-
- // Generate the error correction bytes.
- remainder := gfPolyRemainder(ecpoly, generator)
-
- // Combine the data & error correcting bytes.
- // The mathematically correct answer is:
- //
- // result := gfPolyAdd(ecpoly, remainder).
- //
- // The encoding used by QR Code 2005 is slightly different this result: To
- // preserve the original |data| bit sequence exactly, the data and remainder
- // are combined manually below. This ensures any most significant zero bits
- // are preserved (and not optimised away).
- result := bitset.Clone(data)
- result.AppendBytes(remainder.data(numECBytes))
-
- return result
-}
-
-// rsGeneratorPoly returns the Reed-Solomon generator polynomial with |degree|.
-//
-// The generator polynomial is calculated as:
-// (x + a^0)(x + a^1)...(x + a^degree-1)
-func rsGeneratorPoly(degree int) gfPoly {
- if degree < 2 {
- log.Panic("degree < 2")
- }
-
- generator := gfPoly{term: []gfElement{1}}
-
- for i := 0; i < degree; i++ {
- nextPoly := gfPoly{term: []gfElement{gfExpTable[i], 1}}
- generator = gfPolyMultiply(generator, nextPoly)
- }
-
- return generator
-}
diff --git a/vendor/github.com/skip2/go-qrcode/regular_symbol.go b/vendor/github.com/skip2/go-qrcode/regular_symbol.go
deleted file mode 100644
index 51eb148d..00000000
--- a/vendor/github.com/skip2/go-qrcode/regular_symbol.go
+++ /dev/null
@@ -1,315 +0,0 @@
-// go-qrcode
-// Copyright 2014 Tom Harwood
-
-package qrcode
-
-import (
- bitset "github.com/skip2/go-qrcode/bitset"
-)
-
-type regularSymbol struct {
- version qrCodeVersion
- mask int
-
- data *bitset.Bitset
-
- symbol *symbol
- size int
-}
-
-// Abbreviated true/false.
-const (
- b0 = false
- b1 = true
-)
-
-var (
- alignmentPatternCenter = [][]int{
- {}, // Version 0 doesn't exist.
- {}, // Version 1 doesn't use alignment patterns.
- {6, 18},
- {6, 22},
- {6, 26},
- {6, 30},
- {6, 34},
- {6, 22, 38},
- {6, 24, 42},
- {6, 26, 46},
- {6, 28, 50},
- {6, 30, 54},
- {6, 32, 58},
- {6, 34, 62},
- {6, 26, 46, 66},
- {6, 26, 48, 70},
- {6, 26, 50, 74},
- {6, 30, 54, 78},
- {6, 30, 56, 82},
- {6, 30, 58, 86},
- {6, 34, 62, 90},
- {6, 28, 50, 72, 94},
- {6, 26, 50, 74, 98},
- {6, 30, 54, 78, 102},
- {6, 28, 54, 80, 106},
- {6, 32, 58, 84, 110},
- {6, 30, 58, 86, 114},
- {6, 34, 62, 90, 118},
- {6, 26, 50, 74, 98, 122},
- {6, 30, 54, 78, 102, 126},
- {6, 26, 52, 78, 104, 130},
- {6, 30, 56, 82, 108, 134},
- {6, 34, 60, 86, 112, 138},
- {6, 30, 58, 86, 114, 142},
- {6, 34, 62, 90, 118, 146},
- {6, 30, 54, 78, 102, 126, 150},
- {6, 24, 50, 76, 102, 128, 154},
- {6, 28, 54, 80, 106, 132, 158},
- {6, 32, 58, 84, 110, 136, 162},
- {6, 26, 54, 82, 110, 138, 166},
- {6, 30, 58, 86, 114, 142, 170},
- }
-
- finderPattern = [][]bool{
- {b1, b1, b1, b1, b1, b1, b1},
- {b1, b0, b0, b0, b0, b0, b1},
- {b1, b0, b1, b1, b1, b0, b1},
- {b1, b0, b1, b1, b1, b0, b1},
- {b1, b0, b1, b1, b1, b0, b1},
- {b1, b0, b0, b0, b0, b0, b1},
- {b1, b1, b1, b1, b1, b1, b1},
- }
-
- finderPatternSize = 7
-
- finderPatternHorizontalBorder = [][]bool{
- {b0, b0, b0, b0, b0, b0, b0, b0},
- }
-
- finderPatternVerticalBorder = [][]bool{
- {b0},
- {b0},
- {b0},
- {b0},
- {b0},
- {b0},
- {b0},
- {b0},
- }
-
- alignmentPattern = [][]bool{
- {b1, b1, b1, b1, b1},
- {b1, b0, b0, b0, b1},
- {b1, b0, b1, b0, b1},
- {b1, b0, b0, b0, b1},
- {b1, b1, b1, b1, b1},
- }
-)
-
-func buildRegularSymbol(version qrCodeVersion, mask int,
- data *bitset.Bitset, includeQuietZone bool) (*symbol, error) {
-
- quietZoneSize := 0
- if includeQuietZone {
- quietZoneSize = version.quietZoneSize()
- }
-
- m := &regularSymbol{
- version: version,
- mask: mask,
- data: data,
-
- symbol: newSymbol(version.symbolSize(), quietZoneSize),
- size: version.symbolSize(),
- }
-
- m.addFinderPatterns()
- m.addAlignmentPatterns()
- m.addTimingPatterns()
- m.addFormatInfo()
- m.addVersionInfo()
-
- ok, err := m.addData()
- if !ok {
- return nil, err
- }
-
- return m.symbol, nil
-}
-
-func (m *regularSymbol) addFinderPatterns() {
- fpSize := finderPatternSize
- fp := finderPattern
- fpHBorder := finderPatternHorizontalBorder
- fpVBorder := finderPatternVerticalBorder
-
- // Top left Finder Pattern.
- m.symbol.set2dPattern(0, 0, fp)
- m.symbol.set2dPattern(0, fpSize, fpHBorder)
- m.symbol.set2dPattern(fpSize, 0, fpVBorder)
-
- // Top right Finder Pattern.
- m.symbol.set2dPattern(m.size-fpSize, 0, fp)
- m.symbol.set2dPattern(m.size-fpSize-1, fpSize, fpHBorder)
- m.symbol.set2dPattern(m.size-fpSize-1, 0, fpVBorder)
-
- // Bottom left Finder Pattern.
- m.symbol.set2dPattern(0, m.size-fpSize, fp)
- m.symbol.set2dPattern(0, m.size-fpSize-1, fpHBorder)
- m.symbol.set2dPattern(fpSize, m.size-fpSize-1, fpVBorder)
-}
-
-func (m *regularSymbol) addAlignmentPatterns() {
- for _, x := range alignmentPatternCenter[m.version.version] {
- for _, y := range alignmentPatternCenter[m.version.version] {
- if !m.symbol.empty(x, y) {
- continue
- }
-
- m.symbol.set2dPattern(x-2, y-2, alignmentPattern)
- }
- }
-}
-
-func (m *regularSymbol) addTimingPatterns() {
- value := true
-
- for i := finderPatternSize + 1; i < m.size-finderPatternSize; i++ {
- m.symbol.set(i, finderPatternSize-1, value)
- m.symbol.set(finderPatternSize-1, i, value)
-
- value = !value
- }
-}
-
-func (m *regularSymbol) addFormatInfo() {
- fpSize := finderPatternSize
- l := formatInfoLengthBits - 1
-
- f := m.version.formatInfo(m.mask)
-
- // Bits 0-7, under the top right finder pattern.
- for i := 0; i <= 7; i++ {
- m.symbol.set(m.size-i-1, fpSize+1, f.At(l-i))
- }
-
- // Bits 0-5, right of the top left finder pattern.
- for i := 0; i <= 5; i++ {
- m.symbol.set(fpSize+1, i, f.At(l-i))
- }
-
- // Bits 6-8 on the corner of the top left finder pattern.
- m.symbol.set(fpSize+1, fpSize, f.At(l-6))
- m.symbol.set(fpSize+1, fpSize+1, f.At(l-7))
- m.symbol.set(fpSize, fpSize+1, f.At(l-8))
-
- // Bits 9-14 on the underside of the top left finder pattern.
- for i := 9; i <= 14; i++ {
- m.symbol.set(14-i, fpSize+1, f.At(l-i))
- }
-
- // Bits 8-14 on the right side of the bottom left finder pattern.
- for i := 8; i <= 14; i++ {
- m.symbol.set(fpSize+1, m.size-fpSize+i-8, f.At(l-i))
- }
-
- // Always dark symbol.
- m.symbol.set(fpSize+1, m.size-fpSize-1, true)
-}
-
-func (m *regularSymbol) addVersionInfo() {
- fpSize := finderPatternSize
-
- v := m.version.versionInfo()
- l := versionInfoLengthBits - 1
-
- if v == nil {
- return
- }
-
- for i := 0; i < v.Len(); i++ {
- // Above the bottom left finder pattern.
- m.symbol.set(i/3, m.size-fpSize-4+i%3, v.At(l-i))
-
- // Left of the top right finder pattern.
- m.symbol.set(m.size-fpSize-4+i%3, i/3, v.At(l-i))
- }
-}
-
-type direction uint8
-
-const (
- up direction = iota
- down
-)
-
-func (m *regularSymbol) addData() (bool, error) {
- xOffset := 1
- dir := up
-
- x := m.size - 2
- y := m.size - 1
-
- for i := 0; i < m.data.Len(); i++ {
- var mask bool
- switch m.mask {
- case 0:
- mask = (y+x+xOffset)%2 == 0
- case 1:
- mask = y%2 == 0
- case 2:
- mask = (x+xOffset)%3 == 0
- case 3:
- mask = (y+x+xOffset)%3 == 0
- case 4:
- mask = (y/2+(x+xOffset)/3)%2 == 0
- case 5:
- mask = (y*(x+xOffset))%2+(y*(x+xOffset))%3 == 0
- case 6:
- mask = ((y*(x+xOffset))%2+((y*(x+xOffset))%3))%2 == 0
- case 7:
- mask = ((y+x+xOffset)%2+((y*(x+xOffset))%3))%2 == 0
- }
-
- // != is equivalent to XOR.
- m.symbol.set(x+xOffset, y, mask != m.data.At(i))
-
- if i == m.data.Len()-1 {
- break
- }
-
- // Find next free bit in the symbol.
- for {
- if xOffset == 1 {
- xOffset = 0
- } else {
- xOffset = 1
-
- if dir == up {
- if y > 0 {
- y--
- } else {
- dir = down
- x -= 2
- }
- } else {
- if y < m.size-1 {
- y++
- } else {
- dir = up
- x -= 2
- }
- }
- }
-
- // Skip over the vertical timing pattern entirely.
- if x == 5 {
- x--
- }
-
- if m.symbol.empty(x+xOffset, y) {
- break
- }
- }
- }
-
- return true, nil
-}
diff --git a/vendor/github.com/skip2/go-qrcode/symbol.go b/vendor/github.com/skip2/go-qrcode/symbol.go
deleted file mode 100644
index 0cb1327c..00000000
--- a/vendor/github.com/skip2/go-qrcode/symbol.go
+++ /dev/null
@@ -1,309 +0,0 @@
-// go-qrcode
-// Copyright 2014 Tom Harwood
-
-package qrcode
-
-// symbol is a 2D array of bits representing a QR Code symbol.
-//
-// A symbol consists of size*size modules, with each module normally drawn as a
-// black or white square. The symbol also has a border of quietZoneSize modules.
-//
-// A (fictional) size=2, quietZoneSize=1 QR Code looks like:
-//
-// +----+
-// | |
-// | ab |
-// | cd |
-// | |
-// +----+
-//
-// For ease of implementation, the functions to set/get bits ignore the border,
-// so (0,0)=a, (0,1)=b, (1,0)=c, and (1,1)=d. The entire symbol (including the
-// border) is returned by bitmap().
-//
-type symbol struct {
- // Value of module at [y][x]. True is set.
- module [][]bool
-
- // True if the module at [y][x] is used (to either true or false).
- // Used to identify unused modules.
- isUsed [][]bool
-
- // Combined width/height of the symbol and quiet zones.
- //
- // size = symbolSize + 2*quietZoneSize.
- size int
-
- // Width/height of the symbol only.
- symbolSize int
-
- // Width/height of a single quiet zone.
- quietZoneSize int
-}
-
-// newSymbol constructs a symbol of size size*size, with a border of
-// quietZoneSize.
-func newSymbol(size int, quietZoneSize int) *symbol {
- var m symbol
-
- m.module = make([][]bool, size+2*quietZoneSize)
- m.isUsed = make([][]bool, size+2*quietZoneSize)
-
- for i := range m.module {
- m.module[i] = make([]bool, size+2*quietZoneSize)
- m.isUsed[i] = make([]bool, size+2*quietZoneSize)
- }
-
- m.size = size + 2*quietZoneSize
- m.symbolSize = size
- m.quietZoneSize = quietZoneSize
-
- return &m
-}
-
-// get returns the module value at (x, y).
-func (m *symbol) get(x int, y int) (v bool) {
- v = m.module[y+m.quietZoneSize][x+m.quietZoneSize]
- return
-}
-
-// empty returns true if the module at (x, y) has not been set (to either true
-// or false).
-func (m *symbol) empty(x int, y int) bool {
- return !m.isUsed[y+m.quietZoneSize][x+m.quietZoneSize]
-}
-
-// numEmptyModules returns the number of empty modules.
-//
-// Initially numEmptyModules is symbolSize * symbolSize. After every module has
-// been set (to either true or false), the number of empty modules is zero.
-func (m *symbol) numEmptyModules() int {
- var count int
- for y := 0; y < m.symbolSize; y++ {
- for x := 0; x < m.symbolSize; x++ {
- if !m.isUsed[y+m.quietZoneSize][x+m.quietZoneSize] {
- count++
- }
- }
- }
-
- return count
-}
-
-// set sets the module at (x, y) to v.
-func (m *symbol) set(x int, y int, v bool) {
- m.module[y+m.quietZoneSize][x+m.quietZoneSize] = v
- m.isUsed[y+m.quietZoneSize][x+m.quietZoneSize] = true
-}
-
-// set2dPattern sets a 2D array of modules, starting at (x, y).
-func (m *symbol) set2dPattern(x int, y int, v [][]bool) {
- for j, row := range v {
- for i, value := range row {
- m.set(x+i, y+j, value)
- }
- }
-}
-
-// bitmap returns the entire symbol, including the quiet zone.
-func (m *symbol) bitmap() [][]bool {
- module := make([][]bool, len(m.module))
-
- for i := range m.module {
- module[i] = m.module[i][:]
- }
-
- return module
-}
-
-// string returns a pictorial representation of the symbol, suitable for
-// printing in a TTY.
-func (m *symbol) string() string {
- var result string
-
- for _, row := range m.module {
- for _, value := range row {
- switch value {
- case true:
- result += " "
- case false:
- // Unicode 'FULL BLOCK' (U+2588).
- result += "██"
- }
- }
- result += "\n"
- }
-
- return result
-}
-
-// Constants used to weight penalty calculations. Specified by ISO/IEC
-// 18004:2006.
-const (
- penaltyWeight1 = 3
- penaltyWeight2 = 3
- penaltyWeight3 = 40
- penaltyWeight4 = 10
-)
-
-// penaltyScore returns the penalty score of the symbol. The penalty score
-// consists of the sum of the four individual penalty types.
-func (m *symbol) penaltyScore() int {
- return m.penalty1() + m.penalty2() + m.penalty3() + m.penalty4()
-}
-
-// penalty1 returns the penalty score for "adjacent modules in row/column with
-// same colour".
-//
-// The numbers of adjacent matching modules and scores are:
-// 0-5: score = 0
-// 6+ : score = penaltyWeight1 + (numAdjacentModules - 5)
-func (m *symbol) penalty1() int {
- penalty := 0
-
- for x := 0; x < m.symbolSize; x++ {
- lastValue := m.get(x, 0)
- count := 1
-
- for y := 1; y < m.symbolSize; y++ {
- v := m.get(x, y)
-
- if v != lastValue {
- count = 1
- lastValue = v
- } else {
- count++
- if count == 6 {
- penalty += penaltyWeight1 + 1
- } else if count > 6 {
- penalty++
- }
- }
- }
- }
-
- for y := 0; y < m.symbolSize; y++ {
- lastValue := m.get(0, y)
- count := 1
-
- for x := 1; x < m.symbolSize; x++ {
- v := m.get(x, y)
-
- if v != lastValue {
- count = 1
- lastValue = v
- } else {
- count++
- if count == 6 {
- penalty += penaltyWeight1 + 1
- } else if count > 6 {
- penalty++
- }
- }
- }
- }
-
- return penalty
-}
-
-// penalty2 returns the penalty score for "block of modules in the same colour".
-//
-// m*n: score = penaltyWeight2 * (m-1) * (n-1).
-func (m *symbol) penalty2() int {
- penalty := 0
-
- for y := 1; y < m.symbolSize; y++ {
- for x := 1; x < m.symbolSize; x++ {
- topLeft := m.get(x-1, y-1)
- above := m.get(x, y-1)
- left := m.get(x-1, y)
- current := m.get(x, y)
-
- if current == left && current == above && current == topLeft {
- penalty++
- }
- }
- }
-
- return penalty * penaltyWeight2
-}
-
-// penalty3 returns the penalty score for "1:1:3:1:1 ratio
-// (dark:light:dark:light:dark) pattern in row/column, preceded or followed by
-// light area 4 modules wide".
-//
-// Existence of the pattern scores penaltyWeight3.
-func (m *symbol) penalty3() int {
- penalty := 0
-
- for y := 0; y < m.symbolSize; y++ {
- var bitBuffer int16 = 0x00
-
- for x := 0; x < m.symbolSize; x++ {
- bitBuffer <<= 1
- if v := m.get(x, y); v {
- bitBuffer |= 1
- }
-
- switch bitBuffer & 0x7ff {
- // 0b000 0101 1101 or 0b10111010000
- // 0x05d or 0x5d0
- case 0x05d, 0x5d0:
- penalty += penaltyWeight3
- bitBuffer = 0xFF
- default:
- if x == m.symbolSize-1 && (bitBuffer&0x7f) == 0x5d {
- penalty += penaltyWeight3
- bitBuffer = 0xFF
- }
- }
- }
- }
-
- for x := 0; x < m.symbolSize; x++ {
- var bitBuffer int16 = 0x00
-
- for y := 0; y < m.symbolSize; y++ {
- bitBuffer <<= 1
- if v := m.get(x, y); v {
- bitBuffer |= 1
- }
-
- switch bitBuffer & 0x7ff {
- // 0b000 0101 1101 or 0b10111010000
- // 0x05d or 0x5d0
- case 0x05d, 0x5d0:
- penalty += penaltyWeight3
- bitBuffer = 0xFF
- default:
- if y == m.symbolSize-1 && (bitBuffer&0x7f) == 0x5d {
- penalty += penaltyWeight3
- bitBuffer = 0xFF
- }
- }
- }
- }
-
- return penalty
-}
-
-// penalty4 returns the penalty score...
-func (m *symbol) penalty4() int {
- numModules := m.symbolSize * m.symbolSize
- numDarkModules := 0
-
- for x := 0; x < m.symbolSize; x++ {
- for y := 0; y < m.symbolSize; y++ {
- if v := m.get(x, y); v {
- numDarkModules++
- }
- }
- }
-
- numDarkModuleDeviation := numModules/2 - numDarkModules
- if numDarkModuleDeviation < 0 {
- numDarkModuleDeviation *= -1
- }
-
- return penaltyWeight4 * (numDarkModuleDeviation / (numModules / 20))
-}
diff --git a/vendor/github.com/skip2/go-qrcode/version.go b/vendor/github.com/skip2/go-qrcode/version.go
deleted file mode 100644
index 738cf3d3..00000000
--- a/vendor/github.com/skip2/go-qrcode/version.go
+++ /dev/null
@@ -1,3050 +0,0 @@
-// go-qrcode
-// Copyright 2014 Tom Harwood
-
-package qrcode
-
-import (
- "log"
-
- bitset "github.com/skip2/go-qrcode/bitset"
-)
-
-// Error detection/recovery capacity.
-//
-// There are several levels of error detection/recovery capacity. Higher levels
-// of error recovery are able to correct more errors, with the trade-off of
-// increased symbol size.
-type RecoveryLevel int
-
-const (
- // Level L: 7% error recovery.
- Low RecoveryLevel = iota
-
- // Level M: 15% error recovery. Good default choice.
- Medium
-
- // Level Q: 25% error recovery.
- High
-
- // Level H: 30% error recovery.
- Highest
-)
-
-// qrCodeVersion describes the data length and encoding order of a single QR
-// Code version. There are 40 versions numbers x 4 recovery levels == 160
-// possible qrCodeVersion structures.
-type qrCodeVersion struct {
- // Version number (1-40 inclusive).
- version int
-
- // Error recovery level.
- level RecoveryLevel
-
- dataEncoderType dataEncoderType
-
- // Encoded data can be split into multiple blocks. Each block contains data
- // and error recovery bytes.
- //
- // Larger QR Codes contain more blocks.
- block []block
-
- // Number of bits required to pad the combined data & error correction bit
- // stream up to the symbol's full capacity.
- numRemainderBits int
-}
-
-type block struct {
- numBlocks int
-
- // Total codewords (numCodewords == numErrorCodewords+numDataCodewords).
- numCodewords int
-
- // Number of data codewords.
- numDataCodewords int
-}
-
-var (
- versions = []qrCodeVersion{
- {
- 1,
- Low,
- dataEncoderType1To9,
- []block{
- {
- 1,
- 26,
- 19,
- },
- },
- 0,
- },
- {
- 1,
- Medium,
- dataEncoderType1To9,
- []block{
- {
- 1,
- 26,
- 16,
- },
- },
- 0,
- },
- {
- 1,
- High,
- dataEncoderType1To9,
- []block{
- {
- 1,
- 26,
- 13,
- },
- },
- 0,
- },
- {
- 1,
- Highest,
- dataEncoderType1To9,
- []block{
- {
- 1,
- 26,
- 9,
- },
- },
- 0,
- },
- {
- 2,
- Low,
- dataEncoderType1To9,
- []block{
- {
- 1,
- 44,
- 34,
- },
- },
- 7,
- },
- {
- 2,
- Medium,
- dataEncoderType1To9,
- []block{
- {
- 1,
- 44,
- 28,
- },
- },
- 7,
- },
- {
- 2,
- High,
- dataEncoderType1To9,
- []block{
- {
- 1,
- 44,
- 22,
- },
- },
- 7,
- },
- {
- 2,
- Highest,
- dataEncoderType1To9,
- []block{
- {
- 1,
- 44,
- 16,
- },
- },
- 7,
- },
- {
- 3,
- Low,
- dataEncoderType1To9,
- []block{
- {
- 1,
- 70,
- 55,
- },
- },
- 7,
- },
- {
- 3,
- Medium,
- dataEncoderType1To9,
- []block{
- {
- 1,
- 70,
- 44,
- },
- },
- 7,
- },
- {
- 3,
- High,
- dataEncoderType1To9,
- []block{
- {
- 2,
- 35,
- 17,
- },
- },
- 7,
- },
- {
- 3,
- Highest,
- dataEncoderType1To9,
- []block{
- {
- 2,
- 35,
- 13,
- },
- },
- 7,
- },
- {
- 4,
- Low,
- dataEncoderType1To9,
- []block{
- {
- 1,
- 100,
- 80,
- },
- },
- 7,
- },
- {
- 4,
- Medium,
- dataEncoderType1To9,
- []block{
- {
- 2,
- 50,
- 32,
- },
- },
- 7,
- },
- {
- 4,
- High,
- dataEncoderType1To9,
- []block{
- {
- 2,
- 50,
- 24,
- },
- },
- 7,
- },
- {
- 4,
- Highest,
- dataEncoderType1To9,
- []block{
- {
- 4,
- 25,
- 9,
- },
- },
- 7,
- },
- {
- 5,
- Low,
- dataEncoderType1To9,
- []block{
- {
- 1,
- 134,
- 108,
- },
- },
- 7,
- },
- {
- 5,
- Medium,
- dataEncoderType1To9,
- []block{
- {
- 2,
- 67,
- 43,
- },
- },
- 7,
- },
- {
- 5,
- High,
- dataEncoderType1To9,
- []block{
- {
- 2,
- 33,
- 15,
- },
- {
- 2,
- 34,
- 16,
- },
- },
- 7,
- },
- {
- 5,
- Highest,
- dataEncoderType1To9,
- []block{
- {
- 2,
- 33,
- 11,
- },
- {
- 2,
- 34,
- 12,
- },
- },
- 7,
- },
- {
- 6,
- Low,
- dataEncoderType1To9,
- []block{
- {
- 2,
- 86,
- 68,
- },
- },
- 7,
- },
- {
- 6,
- Medium,
- dataEncoderType1To9,
- []block{
- {
- 4,
- 43,
- 27,
- },
- },
- 7,
- },
- {
- 6,
- High,
- dataEncoderType1To9,
- []block{
- {
- 4,
- 43,
- 19,
- },
- },
- 7,
- },
- {
- 6,
- Highest,
- dataEncoderType1To9,
- []block{
- {
- 4,
- 43,
- 15,
- },
- },
- 7,
- },
- {
- 7,
- Low,
- dataEncoderType1To9,
- []block{
- {
- 2,
- 98,
- 78,
- },
- },
- 0,
- },
- {
- 7,
- Medium,
- dataEncoderType1To9,
- []block{
- {
- 4,
- 49,
- 31,
- },
- },
- 0,
- },
- {
- 7,
- High,
- dataEncoderType1To9,
- []block{
- {
- 2,
- 32,
- 14,
- },
- {
- 4,
- 33,
- 15,
- },
- },
- 0,
- },
- {
- 7,
- Highest,
- dataEncoderType1To9,
- []block{
- {
- 4,
- 39,
- 13,
- },
- {
- 1,
- 40,
- 14,
- },
- },
- 0,
- },
- {
- 8,
- Low,
- dataEncoderType1To9,
- []block{
- {
- 2,
- 121,
- 97,
- },
- },
- 0,
- },
- {
- 8,
- Medium,
- dataEncoderType1To9,
- []block{
- {
- 2,
- 60,
- 38,
- },
- {
- 2,
- 61,
- 39,
- },
- },
- 0,
- },
- {
- 8,
- High,
- dataEncoderType1To9,
- []block{
- {
- 4,
- 40,
- 18,
- },
- {
- 2,
- 41,
- 19,
- },
- },
- 0,
- },
- {
- 8,
- Highest,
- dataEncoderType1To9,
- []block{
- {
- 4,
- 40,
- 14,
- },
- {
- 2,
- 41,
- 15,
- },
- },
- 0,
- },
- {
- 9,
- Low,
- dataEncoderType1To9,
- []block{
- {
- 2,
- 146,
- 116,
- },
- },
- 0,
- },
- {
- 9,
- Medium,
- dataEncoderType1To9,
- []block{
- {
- 3,
- 58,
- 36,
- },
- {
- 2,
- 59,
- 37,
- },
- },
- 0,
- },
- {
- 9,
- High,
- dataEncoderType1To9,
- []block{
- {
- 4,
- 36,
- 16,
- },
- {
- 4,
- 37,
- 17,
- },
- },
- 0,
- },
- {
- 9,
- Highest,
- dataEncoderType1To9,
- []block{
- {
- 4,
- 36,
- 12,
- },
- {
- 4,
- 37,
- 13,
- },
- },
- 0,
- },
- {
- 10,
- Low,
- dataEncoderType10To26,
- []block{
- {
- 2,
- 86,
- 68,
- },
- {
- 2,
- 87,
- 69,
- },
- },
- 0,
- },
- {
- 10,
- Medium,
- dataEncoderType10To26,
- []block{
- {
- 4,
- 69,
- 43,
- },
- {
- 1,
- 70,
- 44,
- },
- },
- 0,
- },
- {
- 10,
- High,
- dataEncoderType10To26,
- []block{
- {
- 6,
- 43,
- 19,
- },
- {
- 2,
- 44,
- 20,
- },
- },
- 0,
- },
- {
- 10,
- Highest,
- dataEncoderType10To26,
- []block{
- {
- 6,
- 43,
- 15,
- },
- {
- 2,
- 44,
- 16,
- },
- },
- 0,
- },
- {
- 11,
- Low,
- dataEncoderType10To26,
- []block{
- {
- 4,
- 101,
- 81,
- },
- },
- 0,
- },
- {
- 11,
- Medium,
- dataEncoderType10To26,
- []block{
- {
- 1,
- 80,
- 50,
- },
- {
- 4,
- 81,
- 51,
- },
- },
- 0,
- },
- {
- 11,
- High,
- dataEncoderType10To26,
- []block{
- {
- 4,
- 50,
- 22,
- },
- {
- 4,
- 51,
- 23,
- },
- },
- 0,
- },
- {
- 11,
- Highest,
- dataEncoderType10To26,
- []block{
- {
- 3,
- 36,
- 12,
- },
- {
- 8,
- 37,
- 13,
- },
- },
- 0,
- },
- {
- 12,
- Low,
- dataEncoderType10To26,
- []block{
- {
- 2,
- 116,
- 92,
- },
- {
- 2,
- 117,
- 93,
- },
- },
- 0,
- },
- {
- 12,
- Medium,
- dataEncoderType10To26,
- []block{
- {
- 6,
- 58,
- 36,
- },
- {
- 2,
- 59,
- 37,
- },
- },
- 0,
- },
- {
- 12,
- High,
- dataEncoderType10To26,
- []block{
- {
- 4,
- 46,
- 20,
- },
- {
- 6,
- 47,
- 21,
- },
- },
- 0,
- },
- {
- 12,
- Highest,
- dataEncoderType10To26,
- []block{
- {
- 7,
- 42,
- 14,
- },
- {
- 4,
- 43,
- 15,
- },
- },
- 0,
- },
- {
- 13,
- Low,
- dataEncoderType10To26,
- []block{
- {
- 4,
- 133,
- 107,
- },
- },
- 0,
- },
- {
- 13,
- Medium,
- dataEncoderType10To26,
- []block{
- {
- 8,
- 59,
- 37,
- },
- {
- 1,
- 60,
- 38,
- },
- },
- 0,
- },
- {
- 13,
- High,
- dataEncoderType10To26,
- []block{
- {
- 8,
- 44,
- 20,
- },
- {
- 4,
- 45,
- 21,
- },
- },
- 0,
- },
- {
- 13,
- Highest,
- dataEncoderType10To26,
- []block{
- {
- 12,
- 33,
- 11,
- },
- {
- 4,
- 34,
- 12,
- },
- },
- 0,
- },
- {
- 14,
- Low,
- dataEncoderType10To26,
- []block{
- {
- 3,
- 145,
- 115,
- },
- {
- 1,
- 146,
- 116,
- },
- },
- 3,
- },
- {
- 14,
- Medium,
- dataEncoderType10To26,
- []block{
- {
- 4,
- 64,
- 40,
- },
- {
- 5,
- 65,
- 41,
- },
- },
- 3,
- },
- {
- 14,
- High,
- dataEncoderType10To26,
- []block{
- {
- 11,
- 36,
- 16,
- },
- {
- 5,
- 37,
- 17,
- },
- },
- 3,
- },
- {
- 14,
- Highest,
- dataEncoderType10To26,
- []block{
- {
- 11,
- 36,
- 12,
- },
- {
- 5,
- 37,
- 13,
- },
- },
- 3,
- },
- {
- 15,
- Low,
- dataEncoderType10To26,
- []block{
- {
- 5,
- 109,
- 87,
- },
- {
- 1,
- 110,
- 88,
- },
- },
- 3,
- },
- {
- 15,
- Medium,
- dataEncoderType10To26,
- []block{
- {
- 5,
- 65,
- 41,
- },
- {
- 5,
- 66,
- 42,
- },
- },
- 3,
- },
- {
- 15,
- High,
- dataEncoderType10To26,
- []block{
- {
- 5,
- 54,
- 24,
- },
- {
- 7,
- 55,
- 25,
- },
- },
- 3,
- },
- {
- 15,
- Highest,
- dataEncoderType10To26,
- []block{
- {
- 11,
- 36,
- 12,
- },
- {
- 7,
- 37,
- 13,
- },
- },
- 3,
- },
- {
- 16,
- Low,
- dataEncoderType10To26,
- []block{
- {
- 5,
- 122,
- 98,
- },
- {
- 1,
- 123,
- 99,
- },
- },
- 3,
- },
- {
- 16,
- Medium,
- dataEncoderType10To26,
- []block{
- {
- 7,
- 73,
- 45,
- },
- {
- 3,
- 74,
- 46,
- },
- },
- 3,
- },
- {
- 16,
- High,
- dataEncoderType10To26,
- []block{
- {
- 15,
- 43,
- 19,
- },
- {
- 2,
- 44,
- 20,
- },
- },
- 3,
- },
- {
- 16,
- Highest,
- dataEncoderType10To26,
- []block{
- {
- 3,
- 45,
- 15,
- },
- {
- 13,
- 46,
- 16,
- },
- },
- 3,
- },
- {
- 17,
- Low,
- dataEncoderType10To26,
- []block{
- {
- 1,
- 135,
- 107,
- },
- {
- 5,
- 136,
- 108,
- },
- },
- 3,
- },
- {
- 17,
- Medium,
- dataEncoderType10To26,
- []block{
- {
- 10,
- 74,
- 46,
- },
- {
- 1,
- 75,
- 47,
- },
- },
- 3,
- },
- {
- 17,
- High,
- dataEncoderType10To26,
- []block{
- {
- 1,
- 50,
- 22,
- },
- {
- 15,
- 51,
- 23,
- },
- },
- 3,
- },
- {
- 17,
- Highest,
- dataEncoderType10To26,
- []block{
- {
- 2,
- 42,
- 14,
- },
- {
- 17,
- 43,
- 15,
- },
- },
- 3,
- },
- {
- 18,
- Low,
- dataEncoderType10To26,
- []block{
- {
- 5,
- 150,
- 120,
- },
- {
- 1,
- 151,
- 121,
- },
- },
- 3,
- },
- {
- 18,
- Medium,
- dataEncoderType10To26,
- []block{
- {
- 9,
- 69,
- 43,
- },
- {
- 4,
- 70,
- 44,
- },
- },
- 3,
- },
- {
- 18,
- High,
- dataEncoderType10To26,
- []block{
- {
- 17,
- 50,
- 22,
- },
- {
- 1,
- 51,
- 23,
- },
- },
- 3,
- },
- {
- 18,
- Highest,
- dataEncoderType10To26,
- []block{
- {
- 2,
- 42,
- 14,
- },
- {
- 19,
- 43,
- 15,
- },
- },
- 3,
- },
- {
- 19,
- Low,
- dataEncoderType10To26,
- []block{
- {
- 3,
- 141,
- 113,
- },
- {
- 4,
- 142,
- 114,
- },
- },
- 3,
- },
- {
- 19,
- Medium,
- dataEncoderType10To26,
- []block{
- {
- 3,
- 70,
- 44,
- },
- {
- 11,
- 71,
- 45,
- },
- },
- 3,
- },
- {
- 19,
- High,
- dataEncoderType10To26,
- []block{
- {
- 17,
- 47,
- 21,
- },
- {
- 4,
- 48,
- 22,
- },
- },
- 3,
- },
- {
- 19,
- Highest,
- dataEncoderType10To26,
- []block{
- {
- 9,
- 39,
- 13,
- },
- {
- 16,
- 40,
- 14,
- },
- },
- 3,
- },
- {
- 20,
- Low,
- dataEncoderType10To26,
- []block{
- {
- 3,
- 135,
- 107,
- },
- {
- 5,
- 136,
- 108,
- },
- },
- 3,
- },
- {
- 20,
- Medium,
- dataEncoderType10To26,
- []block{
- {
- 3,
- 67,
- 41,
- },
- {
- 13,
- 68,
- 42,
- },
- },
- 3,
- },
- {
- 20,
- High,
- dataEncoderType10To26,
- []block{
- {
- 15,
- 54,
- 24,
- },
- {
- 5,
- 55,
- 25,
- },
- },
- 3,
- },
- {
- 20,
- Highest,
- dataEncoderType10To26,
- []block{
- {
- 15,
- 43,
- 15,
- },
- {
- 10,
- 44,
- 16,
- },
- },
- 3,
- },
- {
- 21,
- Low,
- dataEncoderType10To26,
- []block{
- {
- 4,
- 144,
- 116,
- },
- {
- 4,
- 145,
- 117,
- },
- },
- 4,
- },
- {
- 21,
- Medium,
- dataEncoderType10To26,
- []block{
- {
- 17,
- 68,
- 42,
- },
- },
- 4,
- },
- {
- 21,
- High,
- dataEncoderType10To26,
- []block{
- {
- 17,
- 50,
- 22,
- },
- {
- 6,
- 51,
- 23,
- },
- },
- 4,
- },
- {
- 21,
- Highest,
- dataEncoderType10To26,
- []block{
- {
- 19,
- 46,
- 16,
- },
- {
- 6,
- 47,
- 17,
- },
- },
- 4,
- },
- {
- 22,
- Low,
- dataEncoderType10To26,
- []block{
- {
- 2,
- 139,
- 111,
- },
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-)
-
-var (
- // Each QR Code contains a 15-bit Format Information value. The 15 bits
- // consist of 5 data bits concatenated with 10 error correction bits.
- //
- // The 5 data bits consist of:
- // - 2 bits for the error correction level (L=01, M=00, G=11, H=10).
- // - 3 bits for the data mask pattern identifier.
- //
- // formatBitSequence is a mapping from the 5 data bits to the completed 15-bit
- // Format Information value.
- //
- // For example, a QR Code using error correction level L, and data mask
- // pattern identifier 001:
- //
- // 01 | 001 = 01001 = 0x9
- // formatBitSequence[0x9].qrCode = 0x72f3 = 111001011110011
- formatBitSequence = []struct {
- regular uint32
- micro uint32
- }{
- {0x5412, 0x4445},
- {0x5125, 0x4172},
- {0x5e7c, 0x4e2b},
- {0x5b4b, 0x4b1c},
- {0x45f9, 0x55ae},
- {0x40ce, 0x5099},
- {0x4f97, 0x5fc0},
- {0x4aa0, 0x5af7},
- {0x77c4, 0x6793},
- {0x72f3, 0x62a4},
- {0x7daa, 0x6dfd},
- {0x789d, 0x68ca},
- {0x662f, 0x7678},
- {0x6318, 0x734f},
- {0x6c41, 0x7c16},
- {0x6976, 0x7921},
- {0x1689, 0x06de},
- {0x13be, 0x03e9},
- {0x1ce7, 0x0cb0},
- {0x19d0, 0x0987},
- {0x0762, 0x1735},
- {0x0255, 0x1202},
- {0x0d0c, 0x1d5b},
- {0x083b, 0x186c},
- {0x355f, 0x2508},
- {0x3068, 0x203f},
- {0x3f31, 0x2f66},
- {0x3a06, 0x2a51},
- {0x24b4, 0x34e3},
- {0x2183, 0x31d4},
- {0x2eda, 0x3e8d},
- {0x2bed, 0x3bba},
- }
-
- // QR Codes version 7 and higher contain an 18-bit Version Information value,
- // consisting of a 6 data bits and 12 error correction bits.
- //
- // versionBitSequence is a mapping from QR Code version to the completed
- // 18-bit Version Information value.
- //
- // For example, a QR code of version 7:
- // versionBitSequence[0x7] = 0x07c94 = 000111110010010100
- versionBitSequence = []uint32{
- 0x00000,
- 0x00000,
- 0x00000,
- 0x00000,
- 0x00000,
- 0x00000,
- 0x00000,
- 0x07c94,
- 0x085bc,
- 0x09a99,
- 0x0a4d3,
- 0x0bbf6,
- 0x0c762,
- 0x0d847,
- 0x0e60d,
- 0x0f928,
- 0x10b78,
- 0x1145d,
- 0x12a17,
- 0x13532,
- 0x149a6,
- 0x15683,
- 0x168c9,
- 0x177ec,
- 0x18ec4,
- 0x191e1,
- 0x1afab,
- 0x1b08e,
- 0x1cc1a,
- 0x1d33f,
- 0x1ed75,
- 0x1f250,
- 0x209d5,
- 0x216f0,
- 0x228ba,
- 0x2379f,
- 0x24b0b,
- 0x2542e,
- 0x26a64,
- 0x27541,
- 0x28c69,
- }
-)
-
-const (
- formatInfoLengthBits = 15
- versionInfoLengthBits = 18
-)
-
-// formatInfo returns the 15-bit Format Information value for a QR
-// code.
-func (v qrCodeVersion) formatInfo(maskPattern int) *bitset.Bitset {
- formatID := 0
-
- switch v.level {
- case Low:
- formatID = 0x08 // 0b01000
- case Medium:
- formatID = 0x00 // 0b00000
- case High:
- formatID = 0x18 // 0b11000
- case Highest:
- formatID = 0x10 // 0b10000
- default:
- log.Panicf("Invalid level %d", v.level)
- }
-
- if maskPattern < 0 || maskPattern > 7 {
- log.Panicf("Invalid maskPattern %d", maskPattern)
- }
-
- formatID |= maskPattern & 0x7
-
- result := bitset.New()
-
- result.AppendUint32(formatBitSequence[formatID].regular, formatInfoLengthBits)
-
- return result
-}
-
-// versionInfo returns the 18-bit Version Information value for a QR Code.
-//
-// Version Information is applicable only to QR Codes versions 7-40 inclusive.
-// nil is returned if Version Information is not required.
-func (v qrCodeVersion) versionInfo() *bitset.Bitset {
- if v.version < 7 {
- return nil
- }
-
- result := bitset.New()
- result.AppendUint32(versionBitSequence[v.version], 18)
-
- return result
-}
-
-// numDataBits returns the data capacity in bits.
-func (v qrCodeVersion) numDataBits() int {
- numDataBits := 0
- for _, b := range v.block {
- numDataBits += 8 * b.numBlocks * b.numDataCodewords // 8 bits in a byte
- }
-
- return numDataBits
-}
-
-// chooseQRCodeVersion chooses the most suitable QR Code version for a stated
-// data length in bits, the error recovery level required, and the data encoder
-// used.
-//
-// The chosen QR Code version is the smallest version able to fit numDataBits
-// and the optional terminator bits required by the specified encoder.
-//
-// On success the chosen QR Code version is returned.
-func chooseQRCodeVersion(level RecoveryLevel, encoder *dataEncoder, numDataBits int) *qrCodeVersion {
- var chosenVersion *qrCodeVersion
-
- for _, v := range versions {
- if v.level != level {
- continue
- } else if v.version < encoder.minVersion {
- continue
- } else if v.version > encoder.maxVersion {
- break
- }
-
- numFreeBits := v.numDataBits() - numDataBits
-
- if numFreeBits >= 0 {
- chosenVersion = &v
- break
- }
- }
-
- return chosenVersion
-}
-
-func (v qrCodeVersion) numTerminatorBitsRequired(numDataBits int) int {
- numFreeBits := v.numDataBits() - numDataBits
-
- var numTerminatorBits int
-
- switch {
- case numFreeBits >= 4:
- numTerminatorBits = 4
- default:
- numTerminatorBits = numFreeBits
- }
-
- return numTerminatorBits
-}
-
-// numBlocks returns the number of blocks.
-func (v qrCodeVersion) numBlocks() int {
- numBlocks := 0
-
- for _, b := range v.block {
- numBlocks += b.numBlocks
- }
-
- return numBlocks
-}
-
-// numBitsToPadToCodeword returns the number of bits required to pad data of
-// length numDataBits upto the nearest codeword size.
-func (v qrCodeVersion) numBitsToPadToCodeword(numDataBits int) int {
- if numDataBits == v.numDataBits() {
- return 0
- }
-
- return (8 - numDataBits%8) % 8
-}
-
-// symbolSize returns the size of the QR Code symbol in number of modules (which
-// is both the width and height, since QR codes are square). The QR Code has
-// size symbolSize() x symbolSize() pixels. This does not include the quiet
-// zone.
-func (v qrCodeVersion) symbolSize() int {
- return 21 + (v.version-1)*4
-}
-
-// quietZoneSize returns the number of pixels of border space on each side of
-// the QR Code. The quiet space assists with decoding.
-func (v qrCodeVersion) quietZoneSize() int {
- return 4
-}
-
-// getQRCodeVersion returns the QR Code version by version number and recovery
-// level. Returns nil if the requested combination is not defined.
-func getQRCodeVersion(level RecoveryLevel, version int) *qrCodeVersion {
- for _, v := range versions {
- if v.level == level && v.version == version {
- return &v
- }
- }
-
- return nil
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 11:30:00 +0000