/*! * 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 = 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));