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authorfriendica <info@friendica.com>2013-11-07 23:25:13 -0800
committerfriendica <info@friendica.com>2013-11-07 23:25:13 -0800
commit3a9cbcaf011f5c5d423e1cd99b43442669692129 (patch)
treed160f11dd97871d94ffe6e6d10ea48ce57eed357 /library/cryptojs/components/enc-utf16.js
parent90ab0d963bf5074643c6f275dbb8595b6c51a03d (diff)
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+/*
+CryptoJS v3.1.2
+code.google.com/p/crypto-js
+(c) 2009-2013 by Jeff Mott. All rights reserved.
+code.google.com/p/crypto-js/wiki/License
+*/
+(function () {
+ // Shortcuts
+ var C = CryptoJS;
+ var C_lib = C.lib;
+ var WordArray = C_lib.WordArray;
+ var C_enc = C.enc;
+
+ /**
+ * UTF-16 BE encoding strategy.
+ */
+ var Utf16BE = C_enc.Utf16 = C_enc.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
+ *
+ * var utf16String = CryptoJS.enc.Utf16.stringify(wordArray);
+ */
+ stringify: function (wordArray) {
+ // Shortcuts
+ var words = wordArray.words;
+ var sigBytes = wordArray.sigBytes;
+
+ // Convert
+ var utf16Chars = [];
+ for (var i = 0; i < sigBytes; i += 2) {
+ var 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
+ *
+ * var wordArray = CryptoJS.enc.Utf16.parse(utf16String);
+ */
+ parse: function (utf16Str) {
+ // Shortcut
+ var utf16StrLength = utf16Str.length;
+
+ // Convert
+ var words = [];
+ for (var i = 0; i < utf16StrLength; i++) {
+ words[i >>> 1] |= utf16Str.charCodeAt(i) << (16 - (i % 2) * 16);
+ }
+
+ return WordArray.create(words, utf16StrLength * 2);
+ }
+ };
+
+ /**
+ * UTF-16 LE encoding strategy.
+ */
+ C_enc.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
+ *
+ * var utf16Str = CryptoJS.enc.Utf16LE.stringify(wordArray);
+ */
+ stringify: function (wordArray) {
+ // Shortcuts
+ var words = wordArray.words;
+ var sigBytes = wordArray.sigBytes;
+
+ // Convert
+ var utf16Chars = [];
+ for (var i = 0; i < sigBytes; i += 2) {
+ var 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
+ *
+ * var wordArray = CryptoJS.enc.Utf16LE.parse(utf16Str);
+ */
+ parse: function (utf16Str) {
+ // Shortcut
+ var utf16StrLength = utf16Str.length;
+
+ // Convert
+ var words = [];
+ for (var i = 0; i < utf16StrLength; i++) {
+ words[i >>> 1] |= swapEndian(utf16Str.charCodeAt(i) << (16 - (i % 2) * 16));
+ }
+
+ return WordArray.create(words, utf16StrLength * 2);
+ }
+ };
+
+ function swapEndian(word) {
+ return ((word << 8) & 0xff00ff00) | ((word >>> 8) & 0x00ff00ff);
+ }
+}());