| /*! |
| * jquery.base64.js 0.0.3 - https://github.com/yckart/jquery.base64.js |
| * Makes Base64 en & -decoding simpler as it is. |
| * |
| * Based upon: https://gist.github.com/Yaffle/1284012 |
| * |
| * Copyright (c) 2012 Yannick Albert (http://yckart.com) |
| * Licensed under the MIT license (http://www.opensource.org/licenses/mit-license.php). |
| * 2013/02/10 |
| **/ |
| ;(function($) { |
| |
| var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/", |
| a256 = '', |
| r64 = [256], |
| r256 = [256], |
| i = 0; |
| |
| var UTF8 = { |
| |
| /** |
| * Encode multi-byte Unicode string into utf-8 multiple single-byte characters |
| * (BMP / basic multilingual plane only) |
| * |
| * Chars in range U+0080 - U+07FF are encoded in 2 chars, U+0800 - U+FFFF in 3 chars |
| * |
| * @param {String} strUni Unicode string to be encoded as UTF-8 |
| * @returns {String} encoded string |
| */ |
| encode: function(strUni) { |
| // use regular expressions & String.replace callback function for better efficiency |
| // than procedural approaches |
| var strUtf = strUni.replace(/[\u0080-\u07ff]/g, // U+0080 - U+07FF => 2 bytes 110yyyyy, 10zzzzzz |
| function(c) { |
| var cc = c.charCodeAt(0); |
| return String.fromCharCode(0xc0 | cc >> 6, 0x80 | cc & 0x3f); |
| }) |
| .replace(/[\u0800-\uffff]/g, // U+0800 - U+FFFF => 3 bytes 1110xxxx, 10yyyyyy, 10zzzzzz |
| function(c) { |
| var cc = c.charCodeAt(0); |
| return String.fromCharCode(0xe0 | cc >> 12, 0x80 | cc >> 6 & 0x3F, 0x80 | cc & 0x3f); |
| }); |
| return strUtf; |
| }, |
| |
| /** |
| * Decode utf-8 encoded string back into multi-byte Unicode characters |
| * |
| * @param {String} strUtf UTF-8 string to be decoded back to Unicode |
| * @returns {String} decoded string |
| */ |
| decode: function(strUtf) { |
| // note: decode 3-byte chars first as decoded 2-byte strings could appear to be 3-byte char! |
| var strUni = strUtf.replace(/[\u00e0-\u00ef][\u0080-\u00bf][\u0080-\u00bf]/g, // 3-byte chars |
| function(c) { // (note parentheses for precence) |
| var cc = ((c.charCodeAt(0) & 0x0f) << 12) | ((c.charCodeAt(1) & 0x3f) << 6) | (c.charCodeAt(2) & 0x3f); |
| return String.fromCharCode(cc); |
| }) |
| .replace(/[\u00c0-\u00df][\u0080-\u00bf]/g, // 2-byte chars |
| function(c) { // (note parentheses for precence) |
| var cc = (c.charCodeAt(0) & 0x1f) << 6 | c.charCodeAt(1) & 0x3f; |
| return String.fromCharCode(cc); |
| }); |
| return strUni; |
| } |
| }; |
| |
| while(i < 256) { |
| var c = String.fromCharCode(i); |
| a256 += c; |
| r256[i] = i; |
| r64[i] = b64.indexOf(c); |
| ++i; |
| } |
| |
| function code(s, discard, alpha, beta, w1, w2) { |
| s = String(s); |
| var buffer = 0, |
| i = 0, |
| length = s.length, |
| result = '', |
| bitsInBuffer = 0; |
| |
| while(i < length) { |
| var c = s.charCodeAt(i); |
| c = c < 256 ? alpha[c] : -1; |
| |
| buffer = (buffer << w1) + c; |
| bitsInBuffer += w1; |
| |
| while(bitsInBuffer >= w2) { |
| bitsInBuffer -= w2; |
| var tmp = buffer >> bitsInBuffer; |
| result += beta.charAt(tmp); |
| buffer ^= tmp << bitsInBuffer; |
| } |
| ++i; |
| } |
| if(!discard && bitsInBuffer > 0) result += beta.charAt(buffer << (w2 - bitsInBuffer)); |
| return result; |
| } |
| |
| var Plugin = $.base64 = function(dir, input, encode) { |
| return input ? Plugin[dir](input, encode) : dir ? null : this; |
| }; |
| |
| Plugin.btoa = Plugin.encode = function(plain, utf8encode) { |
| plain = Plugin.raw === false || Plugin.utf8encode || utf8encode ? UTF8.encode(plain) : plain; |
| plain = code(plain, false, r256, b64, 8, 6); |
| return plain + '===='.slice((plain.length % 4) || 4); |
| }; |
| |
| Plugin.atob = Plugin.decode = function(coded, utf8decode) { |
| coded = coded.replace(/[^A-Za-z0-9\+\/\=]/g, ""); |
| coded = String(coded).split('='); |
| var i = coded.length; |
| do {--i; |
| coded[i] = code(coded[i], true, r64, a256, 6, 8); |
| } while (i > 0); |
| coded = coded.join(''); |
| return Plugin.raw === false || Plugin.utf8decode || utf8decode ? UTF8.decode(coded) : coded; |
| }; |
| }(jQuery)); |