Subversion Repositories SmartDukaan

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var Base64 = {

    _keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

    encode: function(input) {

        var output = "";

        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;

        var i = 0;

        input = Base64._utf8_encode(input);

        while (i < input.length) {

            chr1 = input.charCodeAt(i++);

            chr2 = input.charCodeAt(i++);

            chr3 = input.charCodeAt(i++);

            enc1 = chr1 >> 2;

            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);

            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);

            enc4 = chr3 & 63;

            if (isNaN(chr2)) {

                enc3 = enc4 = 64;

            } else if (isNaN(chr3)) {

                enc4 = 64;

            }

            output = output + this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) + this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);

        }

        return output;

    },

    decode: function(input) {

        var output = "";

        var chr1, chr2, chr3;

        var enc1, enc2, enc3, enc4;

        var i = 0;

        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

        while (i < input.length) {

            enc1 = this._keyStr.indexOf(input.charAt(i++));

            enc2 = this._keyStr.indexOf(input.charAt(i++));

            enc3 = this._keyStr.indexOf(input.charAt(i++));

            enc4 = this._keyStr.indexOf(input.charAt(i++));

            chr1 = (enc1 << 2) | (enc2 >> 4);

            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);

            chr3 = ((enc3 & 3) << 6) | enc4;

            output = output + String.fromCharCode(chr1);

            if (enc3 != 64) {

                output = output + String.fromCharCode(chr2);

            }

            if (enc4 != 64) {

                output = output + String.fromCharCode(chr3);

            }

        }

        output = Base64._utf8_decode(output);

        return output;

    },

    _utf8_encode: function(string) {

        string = string.replace(/\r\n/g, "\n");

        var utftext = "";

        for (var n = 0; n < string.length; n++) {

            var c = string.charCodeAt(n);

            if (c < 128) {

                utftext += String.fromCharCode(c);

            }

            else if ((c > 127) && (c < 2048)) {

                utftext += String.fromCharCode((c >> 6) | 192);

                utftext += String.fromCharCode((c & 63) | 128);

            }

            else {

                utftext += String.fromCharCode((c >> 12) | 224);

                utftext += String.fromCharCode(((c >> 6) & 63) | 128);

                utftext += String.fromCharCode((c & 63) | 128);

            }

        }

        return utftext;

    },

    _utf8_decode: function(utftext) {

        var string = "";

        var i = 0;

        var c = c1 = c2 = 0;

        while (i < utftext.length) {

            c = utftext.charCodeAt(i);

            if (c < 128) {

                string += String.fromCharCode(c);

                i++;

            }

            else if ((c > 191) && (c < 224)) {

                c2 = utftext.charCodeAt(i + 1);

                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));

                i += 2;

            }

            else {

                c2 = utftext.charCodeAt(i + 1);

                c3 = utftext.charCodeAt(i + 2);

                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));

                i += 3;

            }

        }

        return string;

    }

}