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node_modules/crypto-es/lib/enc-utf16.js

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+import {
+  WordArray,
+} from './core.js';
+
+const swapEndian = word => ((word << 8) & 0xff00ff00) | ((word >>> 8) & 0x00ff00ff);
+
+/**
+ * UTF-16 BE encoding strategy.
+ */
+export const Utf16BE = {
+  /**
+   * Converts a word array to a UTF-16 BE string.
+   *
+   * @param {WordArray} wordArray The word array.
+   *
+   * @return {string} The UTF-16 BE string.
+   *
+   * @static
+   *
+   * @example
+   *
+   *     const utf16String = CryptoJS.enc.Utf16.stringify(wordArray);
+   */
+  stringify(wordArray) {
+    // Shortcuts
+    const { words, sigBytes } = wordArray;
+
+    // Convert
+    const utf16Chars = [];
+    for (let i = 0; i < sigBytes; i += 2) {
+      const codePoint = (words[i >>> 2] >>> (16 - (i % 4) * 8)) & 0xffff;
+      utf16Chars.push(String.fromCharCode(codePoint));
+    }
+
+    return utf16Chars.join('');
+  },
+
+  /**
+   * Converts a UTF-16 BE string to a word array.
+   *
+   * @param {string} utf16Str The UTF-16 BE string.
+   *
+   * @return {WordArray} The word array.
+   *
+   * @static
+   *
+   * @example
+   *
+   *     const wordArray = CryptoJS.enc.Utf16.parse(utf16String);
+   */
+  parse(utf16Str) {
+    // Shortcut
+    const utf16StrLength = utf16Str.length;
+
+    // Convert
+    const words = [];
+    for (let i = 0; i < utf16StrLength; i += 1) {
+      words[i >>> 1] |= utf16Str.charCodeAt(i) << (16 - (i % 2) * 16);
+    }
+
+    return WordArray.create(words, utf16StrLength * 2);
+  },
+};
+export const Utf16 = Utf16BE;
+
+/**
+ * UTF-16 LE encoding strategy.
+ */
+export const Utf16LE = {
+  /**
+   * Converts a word array to a UTF-16 LE string.
+   *
+   * @param {WordArray} wordArray The word array.
+   *
+   * @return {string} The UTF-16 LE string.
+   *
+   * @static
+   *
+   * @example
+   *
+   *     const utf16Str = CryptoJS.enc.Utf16LE.stringify(wordArray);
+   */
+  stringify(wordArray) {
+    // Shortcuts
+    const { words, sigBytes } = wordArray;
+
+    // Convert
+    const utf16Chars = [];
+    for (let i = 0; i < sigBytes; i += 2) {
+      const codePoint = swapEndian((words[i >>> 2] >>> (16 - (i % 4) * 8)) & 0xffff);
+      utf16Chars.push(String.fromCharCode(codePoint));
+    }
+
+    return utf16Chars.join('');
+  },
+
+  /**
+   * Converts a UTF-16 LE string to a word array.
+   *
+   * @param {string} utf16Str The UTF-16 LE string.
+   *
+   * @return {WordArray} The word array.
+   *
+   * @static
+   *
+   * @example
+   *
+   *     const wordArray = CryptoJS.enc.Utf16LE.parse(utf16Str);
+   */
+  parse(utf16Str) {
+    // Shortcut
+    const utf16StrLength = utf16Str.length;
+
+    // Convert
+    const words = [];
+    for (let i = 0; i < utf16StrLength; i += 1) {
+      words[i >>> 1] |= swapEndian(utf16Str.charCodeAt(i) << (16 - (i % 2) * 16));
+    }
+
+    return WordArray.create(words, utf16StrLength * 2);
+  },
+};