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enc-utf16.js4.0 KB · 149 lines
;(function (root, factory) {	if (typeof exports === "object") {		// CommonJS		module.exports = exports = factory(require("./core"));	}	else if (typeof define === "function" && define.amd) {		// AMD		define(["./core"], factory);	}	else {		// Global (browser)		factory(root.CryptoJS);	}}(this, function (CryptoJS) { 	(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);	    }	}());  	return CryptoJS.enc.Utf16; }));