summaryrefslogtreecommitdiffstats
path: root/vendor/github.com/skip2/go-qrcode/bitset
diff options
context:
space:
mode:
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/go-qrcode/bitset
parente7b193788a56ee7cdb02a87a9db0ad6724ef66d5 (diff)
downloadmatterbridge-msglm-e3cafeaf9292f67459ff1d186f68283bfaedf2ae.tar.gz
matterbridge-msglm-e3cafeaf9292f67459ff1d186f68283bfaedf2ae.tar.bz2
matterbridge-msglm-e3cafeaf9292f67459ff1d186f68283bfaedf2ae.zip
Add dependencies/vendor (whatsapp)
Diffstat (limited to 'vendor/github.com/skip2/go-qrcode/bitset')
-rw-r--r--vendor/github.com/skip2/go-qrcode/bitset/bitset.go273
1 files changed, 0 insertions, 273 deletions
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
-}