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Diffstat (limited to 'packages/integrations/image/src/utils/shorthash.ts')
-rw-r--r-- | packages/integrations/image/src/utils/shorthash.ts | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/packages/integrations/image/src/utils/shorthash.ts b/packages/integrations/image/src/utils/shorthash.ts deleted file mode 100644 index 1a5575f72..000000000 --- a/packages/integrations/image/src/utils/shorthash.ts +++ /dev/null @@ -1,67 +0,0 @@ -/** - * shortdash - https://github.com/bibig/node-shorthash - * - * @license - * - * (The MIT License) - * - * Copyright (c) 2013 Bibig <bibig@me.com> - * - * 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. - */ - -const dictionary = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXY'; -const binary = dictionary.length; - -// refer to: http://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/ -function bitwise(str: string) { - let hash = 0; - if (str.length === 0) return hash; - for (let i = 0; i < str.length; i++) { - const ch = str.charCodeAt(i); - hash = (hash << 5) - hash + ch; - hash = hash & hash; // Convert to 32bit integer - } - return hash; -} - -export function shorthash(text: string) { - let num: number; - let result = ''; - - let integer = bitwise(text); - const sign = integer < 0 ? 'Z' : ''; // If it's negative, start with Z, which isn't in the dictionary - - integer = Math.abs(integer); - - while (integer >= binary) { - num = integer % binary; - integer = Math.floor(integer / binary); - result = dictionary[num] + result; - } - - if (integer > 0) { - result = dictionary[integer] + result; - } - - return sign + result; -} |