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authorBenjamin <b.mpickford@outlook.com>2019-11-18 06:18:01 +1000
committerWim <wim@42.be>2019-11-17 21:18:01 +0100
commit0917dc876613fd71c9726a34bf0138b4f5121be9 (patch)
tree1eacaadaa4869e8f74ccf65c684c2a80f90787f9 /vendor/gitlab.com/golang-commonmark/puny/puny.go
parentaba86855b5f71c9809d892a7eebc6b69872fcd5b (diff)
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Update markdown parsing library to github.com/gomarkdown/markdown (#944)
Diffstat (limited to 'vendor/gitlab.com/golang-commonmark/puny/puny.go')
-rw-r--r--vendor/gitlab.com/golang-commonmark/puny/puny.go287
1 files changed, 0 insertions, 287 deletions
diff --git a/vendor/gitlab.com/golang-commonmark/puny/puny.go b/vendor/gitlab.com/golang-commonmark/puny/puny.go
deleted file mode 100644
index 8f71402c..00000000
--- a/vendor/gitlab.com/golang-commonmark/puny/puny.go
+++ /dev/null
@@ -1,287 +0,0 @@
-// Copyright 2015 The Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package puny provides functions for encoding/decoding to/from punycode.
-package puny
-
-import (
- "errors"
- "strings"
- "unicode/utf8"
-)
-
-const (
- maxInt32 int32 = 2147483647
- base int32 = 36
- tMin int32 = 1
- baseMinusTMin = base - tMin
- tMax int32 = 26
- skew int32 = 38
- damp int32 = 700
- initialBias int32 = 72
- initialN int32 = 128
-)
-
-var (
- ErrOverflow = errors.New("overflow: input needs wider integers to process")
- ErrNotBasic = errors.New("illegal input >= 0x80 (not a basic code point)")
- ErrInvalidInput = errors.New("invalid input")
-)
-
-func adapt(delta, numPoints int32, firstTime bool) int32 {
- if firstTime {
- delta /= damp
- } else {
- delta /= 2
- }
- delta += delta / numPoints
- k := int32(0)
- for delta > baseMinusTMin*tMax/2 {
- delta = delta / baseMinusTMin
- k += base
- }
- return k + (baseMinusTMin+1)*delta/(delta+skew)
-}
-
-func basicToDigit(b byte) int32 {
- switch {
- case b >= '0' && b <= '9':
- return int32(b - 22)
- case b >= 'A' && b <= 'Z':
- return int32(b - 'A')
- case b >= 'a' && b <= 'z':
- return int32(b - 'a')
- }
- return base
-}
-
-func digitToBasic(digit int32) byte {
- switch {
- case digit >= 0 && digit <= 25:
- return byte(digit) + 'a'
- case digit >= 26 && digit <= 35:
- return byte(digit) - 26 + '0'
- }
- panic("unreachable")
-}
-
-func lastIndex(s string, c byte) int {
- for i := len(s) - 1; i >= 0; i-- {
- if s[i] == c {
- return i
- }
- }
- return -1
-}
-
-func ascii(s string) bool {
- for _, r := range s {
- if r > 0x7e {
- return false
- }
- }
- return true
-}
-
-// Decode converts a Punycode string of ASCII-only symbols to a string of Unicode symbols.
-func Decode(s string) (string, error) {
- basic := lastIndex(s, '-')
- output := make([]rune, 0, len(s))
- for i := 0; i < basic; i++ {
- b := s[i]
- if b >= 0x80 {
- return "", ErrNotBasic
- }
- output = append(output, rune(b))
- }
-
- i, n, bias, pos := int32(0), initialN, initialBias, basic+1
-
- for pos < len(s) {
- oldi, w, k := i, int32(1), base
- for {
- digit := basicToDigit(s[pos])
- pos++
-
- if digit >= base || digit > (maxInt32-i)/w {
- return "", ErrOverflow
- }
-
- i += digit * w
-
- t := k - bias
- if t < tMin {
- t = tMin
- } else if t > tMax {
- t = tMax
- }
-
- if digit < t {
- break
- }
-
- if pos == len(s) {
- return "", ErrInvalidInput
- }
-
- baseMinusT := base - t
- if w > maxInt32/baseMinusT {
- return "", ErrOverflow
- }
-
- w *= baseMinusT
- k += base
- }
-
- out := int32(len(output) + 1)
- bias = adapt(i-oldi, out, oldi == 0)
-
- if i/out > maxInt32-n {
- return "", ErrOverflow
- }
-
- n += i / out
- i %= out
-
- output = append(output, 0)
- copy(output[i+1:], output[i:])
- output[i] = rune(n)
-
- i++
- }
-
- return string(output), nil
-}
-
-// Encode converts a string of Unicode symbols (e.g. a domain name label) to a
-// Punycode string of ASCII-only symbols.
-func Encode(input string) (string, error) {
- n := initialN
- delta := int32(0)
- bias := initialBias
-
- var output []byte
- runes := 0
- for _, r := range input {
- if r >= 0x80 {
- runes++
- continue
- }
- output = append(output, byte(r))
- }
-
- basicLength := len(output)
- handledCPCount := basicLength
-
- if basicLength > 0 {
- output = append(output, '-')
- }
-
- for runes > 0 {
- m := maxInt32
- for _, r := range input {
- if r >= n && r < m {
- m = r
- }
- }
-
- handledCPCountPlusOne := int32(handledCPCount + 1)
- if m-n > (maxInt32-delta)/handledCPCountPlusOne {
- return "", ErrOverflow
- }
-
- delta += (m - n) * handledCPCountPlusOne
- n = m
-
- for _, r := range input {
- if r < n {
- delta++
- if delta < 0 {
- return "", ErrOverflow
- }
- continue
- }
- if r > n {
- continue
- }
- q := delta
- for k := base; ; k += base {
- t := k - bias
- if t < tMin {
- t = tMin
- } else if t > tMax {
- t = tMax
- }
- if q < t {
- break
- }
- qMinusT := q - t
- baseMinusT := base - t
- output = append(output, digitToBasic(t+qMinusT%baseMinusT))
- q = qMinusT / baseMinusT
- }
-
- output = append(output, digitToBasic(q))
- bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength)
- delta = 0
- handledCPCount++
- runes--
- }
- delta++
- n++
- }
- return string(output), nil
-}
-
-func sep(r rune) bool { return r == '.' || r == '。' || r == '.' || r == '。' }
-
-func mapLabels(s string, fn func(string) string) string {
- var result string
- i := strings.IndexByte(s, '@')
- if i != -1 {
- result = s[:i+1]
- s = s[i+1:]
- }
- var labels []string
- start := 0
- for i, r := range s {
- if !sep(r) {
- continue
- }
- labels = append(labels, fn(s[start:i]))
- start = i + utf8.RuneLen(r)
- }
- labels = append(labels, fn(s[start:]))
- return result + strings.Join(labels, ".")
-}
-
-// ToUnicode converts a Punycode string representing a domain name or an email address
-// to Unicode. Only the Punycoded parts of the input will be converted.
-func ToUnicode(s string) string {
- return mapLabels(s, func(s string) string {
- if !strings.HasPrefix(s, "xn--") {
- return s
- }
- d, err := Decode(strings.ToLower(s[4:]))
- if err != nil {
- return s
- }
- return d
- })
-}
-
-// ToASCII converts a Unicode string representing a domain name or an email address to
-// Punycode. Only the non-ASCII parts of the domain name will be converted.
-func ToASCII(s string) string {
- return mapLabels(s, func(s string) string {
- if ascii(s) {
- return s
- }
- d, err := Encode(s)
- if err != nil {
- return s
- }
- return "xn--" + d
- })
-}