https://lagodapedra.ma.gov.br/js/jquery.base64.js

1/*!
2 * jquery.base64.js 0.1 - https://github.com/yckart/jquery.base64.js
3 * Makes Base64 en & -decoding simpler as it is.
4 *
5 * Based upon: https://gist.github.com/Yaffle/1284012
6 *
7 * Copyright (c) 2012 Yannick Albert (http://yckart.com)
8 * Licensed under the MIT license (http://www.opensource.org/licenses/mit-license.php).
9 * 2013/02/10
10 **/
11;(function($) {
12
13    var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
14        a256 = '',
15        r64 = [256],
16        r256 = [256],
17        i = 0;
18
19    var UTF8 = {
20
21        /**
22         * Encode multi-byte Unicode string into utf-8 multiple single-byte characters
23         * (BMP / basic multilingual plane only)
24         *
25         * Chars in range U+0080 - U+07FF are encoded in 2 chars, U+0800 - U+FFFF in 3 chars
26         *
27         * @param {String} strUni Unicode string to be encoded as UTF-8
28         * @returns {String} encoded string
29         */
30        encode: function(strUni) {
31            // use regular expressions & String.replace callback function for better efficiency
32            // than procedural approaches
33            var strUtf = strUni.replace(/[\u0080-\u07ff]/g, // U+0080 - U+07FF => 2 bytes 110yyyyy, 10zzzzzz
34            function(c) {
35                var cc = c.charCodeAt(0);
36                return String.fromCharCode(0xc0 | cc >> 6, 0x80 | cc & 0x3f);
37            })
38            .replace(/[\u0800-\uffff]/g, // U+0800 - U+FFFF => 3 bytes 1110xxxx, 10yyyyyy, 10zzzzzz
39            function(c) {
40                var cc = c.charCodeAt(0);
41                return String.fromCharCode(0xe0 | cc >> 12, 0x80 | cc >> 6 & 0x3F, 0x80 | cc & 0x3f);
42            });
43            return strUtf;
44        },
45
46        /**
47         * Decode utf-8 encoded string back into multi-byte Unicode characters
48         *
49         * @param {String} strUtf UTF-8 string to be decoded back to Unicode
50         * @returns {String} decoded string
51         */
52        decode: function(strUtf) {
53            // note: decode 3-byte chars first as decoded 2-byte strings could appear to be 3-byte char!
54            var strUni = strUtf.replace(/[\u00e0-\u00ef][\u0080-\u00bf][\u0080-\u00bf]/g, // 3-byte chars
55            function(c) { // (note parentheses for precence)
56                var cc = ((c.charCodeAt(0) & 0x0f) << 12) | ((c.charCodeAt(1) & 0x3f) << 6) | (c.charCodeAt(2) & 0x3f);
57                return String.fromCharCode(cc);
58            })
59            .replace(/[\u00c0-\u00df][\u0080-\u00bf]/g, // 2-byte chars
60            function(c) { // (note parentheses for precence)
61                var cc = (c.charCodeAt(0) & 0x1f) << 6 | c.charCodeAt(1) & 0x3f;
62                return String.fromCharCode(cc);
63            });
64            return strUni;
65        }
66    };
67
68    while(i < 256) {
69        var c = String.fromCharCode(i);
70        a256 += c;
71        r256[i] = i;
72        r64[i] = b64.indexOf(c);
73        ++i;
74    }
75
76    function code(s, discard, alpha, beta, w1, w2) {
77        s = String(s);
78        var buffer = 0,
79            i = 0,
80            length = s.length,
81            result = '',
82            bitsInBuffer = 0;
83
84        while(i < length) {
85            var c = s.charCodeAt(i);
86            c = c < 256 ? alpha[c] : -1;
87
88            buffer = (buffer << w1) + c;
89            bitsInBuffer += w1;
90
91            while(bitsInBuffer >= w2) {
92                bitsInBuffer -= w2;
93                var tmp = buffer >> bitsInBuffer;
94                result += beta.charAt(tmp);
95                buffer ^= tmp << bitsInBuffer;
96            }
97            ++i;
98        }
99        if(!discard && bitsInBuffer > 0) result += beta.charAt(buffer << (w2 - bitsInBuffer));
100        return result;
101    }
102
103    var Plugin = $.base64 = function(dir, input, encode) {
104            return input ? Plugin[dir](input, encode) : dir ? null : this;
105        };
106
107    Plugin.btoa = Plugin.encode = function(plain, utf8encode) {
108        plain = Plugin.raw === false || Plugin.utf8encode || utf8encode ? UTF8.encode(plain) : plain;
109        plain = code(plain, false, r256, b64, 8, 6);
110        return plain + '===='.slice((plain.length % 4) || 4);
111    };
112
113    Plugin.atob = Plugin.decode = function(coded, utf8decode) {
114        coded = String(coded).split('=');
115        var i = coded.length;
116        do {--i;
117            coded[i] = code(coded[i], true, r64, a256, 6, 8);
118        } while (i > 0);
119        coded = coded.join('');
120        return Plugin.raw === false || Plugin.utf8decode || utf8decode ? UTF8.decode(coded) : coded;
121    };
122}(jQuery));