@sskmy1024y/react-native-hash/JSHash/lib/core/Latin1.js

A hashing library for react-native

/* eslint linebreak-style: ["error", "windows"] */
/* eslint-disable no-use-before-define */

import WordArray from './WordArray.js';


/**
 * Latin1 encoding strategy.
 */
const Latin1 = {
  /**
     * Converts a word array to a Latin1 string.
     *
     * @param {WordArray} wordArray The word array.
     *
     * @return {string} The Latin1 string.
     *
     * @static
     *
     * @example
     *
     *     var latin1String = CryptoJS.enc.Latin1.stringify(wordArray);
     */
  stringify(wordArray) {
    // Shortcuts
    const { words, sigBytes } = wordArray;

    // Convert
    const latin1Chars = [];
    for (let i = 0; i < sigBytes; i += 1) {
      const bite = (words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;
      latin1Chars.push(String.fromCharCode(bite));
    }

    return latin1Chars.join('');
  },

  /**
     * Converts a Latin1 string to a word array.
     *
     * @param {string} latin1Str The Latin1 string.
     *
     * @return {WordArray} The word array.
     *
     * @static
     *
     * @example
     *
     *     var wordArray = CryptoJS.enc.Latin1.parse(latin1String);
     */
  parse(latin1Str) {
    // Shortcut
    const latin1StrLength = latin1Str.length;

    // Convert
    const words = [];
    for (let i = 0; i < latin1StrLength; i += 1) {
      words[i >>> 2] |= (latin1Str.charCodeAt(i) & 0xff) << (24 - (i % 4) * 8);
    }

    return new WordArray(words, latin1StrLength);
  },
};

export default Latin1;