diff options
Diffstat (limited to 'vendor/github.com/Unknwon/com/string.go')
| -rw-r--r-- | vendor/github.com/Unknwon/com/string.go | 253 |
1 files changed, 0 insertions, 253 deletions
diff --git a/vendor/github.com/Unknwon/com/string.go b/vendor/github.com/Unknwon/com/string.go deleted file mode 100644 index 7080d174..00000000 --- a/vendor/github.com/Unknwon/com/string.go +++ /dev/null @@ -1,253 +0,0 @@ -// Copyright 2013 com authors -// -// Licensed under the Apache License, Version 2.0 (the "License"): you may -// not use this file except in compliance with the License. You may obtain -// a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT -// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the -// License for the specific language governing permissions and limitations -// under the License. - -package com - -import ( - "bytes" - "crypto/aes" - "crypto/cipher" - "crypto/rand" - "errors" - r "math/rand" - "strconv" - "strings" - "time" - "unicode" - "unicode/utf8" -) - -// AESGCMEncrypt encrypts plaintext with the given key using AES in GCM mode. -func AESGCMEncrypt(key, plaintext []byte) ([]byte, error) { - block, err := aes.NewCipher(key) - if err != nil { - return nil, err - } - - gcm, err := cipher.NewGCM(block) - if err != nil { - return nil, err - } - - nonce := make([]byte, gcm.NonceSize()) - if _, err := rand.Read(nonce); err != nil { - return nil, err - } - - ciphertext := gcm.Seal(nil, nonce, plaintext, nil) - return append(nonce, ciphertext...), nil -} - -// AESGCMDecrypt decrypts ciphertext with the given key using AES in GCM mode. -func AESGCMDecrypt(key, ciphertext []byte) ([]byte, error) { - block, err := aes.NewCipher(key) - if err != nil { - return nil, err - } - - gcm, err := cipher.NewGCM(block) - if err != nil { - return nil, err - } - - size := gcm.NonceSize() - if len(ciphertext)-size <= 0 { - return nil, errors.New("Ciphertext is empty") - } - - nonce := ciphertext[:size] - ciphertext = ciphertext[size:] - - plainText, err := gcm.Open(nil, nonce, ciphertext, nil) - if err != nil { - return nil, err - } - - return plainText, nil -} - -// IsLetter returns true if the 'l' is an English letter. -func IsLetter(l uint8) bool { - n := (l | 0x20) - 'a' - if n >= 0 && n < 26 { - return true - } - return false -} - -// Expand replaces {k} in template with match[k] or subs[atoi(k)] if k is not in match. -func Expand(template string, match map[string]string, subs ...string) string { - var p []byte - var i int - for { - i = strings.Index(template, "{") - if i < 0 { - break - } - p = append(p, template[:i]...) - template = template[i+1:] - i = strings.Index(template, "}") - if s, ok := match[template[:i]]; ok { - p = append(p, s...) - } else { - j, _ := strconv.Atoi(template[:i]) - if j >= len(subs) { - p = append(p, []byte("Missing")...) - } else { - p = append(p, subs[j]...) - } - } - template = template[i+1:] - } - p = append(p, template...) - return string(p) -} - -// Reverse s string, support unicode -func Reverse(s string) string { - n := len(s) - runes := make([]rune, n) - for _, rune := range s { - n-- - runes[n] = rune - } - return string(runes[n:]) -} - -// RandomCreateBytes generate random []byte by specify chars. -func RandomCreateBytes(n int, alphabets ...byte) []byte { - const alphanum = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" - var bytes = make([]byte, n) - var randby bool - if num, err := rand.Read(bytes); num != n || err != nil { - r.Seed(time.Now().UnixNano()) - randby = true - } - for i, b := range bytes { - if len(alphabets) == 0 { - if randby { - bytes[i] = alphanum[r.Intn(len(alphanum))] - } else { - bytes[i] = alphanum[b%byte(len(alphanum))] - } - } else { - if randby { - bytes[i] = alphabets[r.Intn(len(alphabets))] - } else { - bytes[i] = alphabets[b%byte(len(alphabets))] - } - } - } - return bytes -} - -// ToSnakeCase can convert all upper case characters in a string to -// underscore format. -// -// Some samples. -// "FirstName" => "first_name" -// "HTTPServer" => "http_server" -// "NoHTTPS" => "no_https" -// "GO_PATH" => "go_path" -// "GO PATH" => "go_path" // space is converted to underscore. -// "GO-PATH" => "go_path" // hyphen is converted to underscore. -// -// From https://github.com/huandu/xstrings -func ToSnakeCase(str string) string { - if len(str) == 0 { - return "" - } - - buf := &bytes.Buffer{} - var prev, r0, r1 rune - var size int - - r0 = '_' - - for len(str) > 0 { - prev = r0 - r0, size = utf8.DecodeRuneInString(str) - str = str[size:] - - switch { - case r0 == utf8.RuneError: - buf.WriteByte(byte(str[0])) - - case unicode.IsUpper(r0): - if prev != '_' { - buf.WriteRune('_') - } - - buf.WriteRune(unicode.ToLower(r0)) - - if len(str) == 0 { - break - } - - r0, size = utf8.DecodeRuneInString(str) - str = str[size:] - - if !unicode.IsUpper(r0) { - buf.WriteRune(r0) - break - } - - // find next non-upper-case character and insert `_` properly. - // it's designed to convert `HTTPServer` to `http_server`. - // if there are more than 2 adjacent upper case characters in a word, - // treat them as an abbreviation plus a normal word. - for len(str) > 0 { - r1 = r0 - r0, size = utf8.DecodeRuneInString(str) - str = str[size:] - - if r0 == utf8.RuneError { - buf.WriteRune(unicode.ToLower(r1)) - buf.WriteByte(byte(str[0])) - break - } - - if !unicode.IsUpper(r0) { - if r0 == '_' || r0 == ' ' || r0 == '-' { - r0 = '_' - - buf.WriteRune(unicode.ToLower(r1)) - } else { - buf.WriteRune('_') - buf.WriteRune(unicode.ToLower(r1)) - buf.WriteRune(r0) - } - - break - } - - buf.WriteRune(unicode.ToLower(r1)) - } - - if len(str) == 0 || r0 == '_' { - buf.WriteRune(unicode.ToLower(r0)) - break - } - - default: - if r0 == ' ' || r0 == '-' { - r0 = '_' - } - - buf.WriteRune(r0) - } - } - - return buf.String() -} |