raismth.ns(function() { with (raismth.LIB) {
myDump("[RAISMTH] base64 module initialization\n");

theApp.base64 =
{
        // private property
        _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

        // public method for encoding
        encode : function (input) {
                let output = "";
                let chr1, chr2, chr3, enc1, enc2, enc3, enc4;
                let i = 0;
                input = raismth.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;
        },

        // public method for decoding
        decode : function (input) {
                let output = "";
                let chr1, chr2, chr3;
                let enc1, enc2, enc3, enc4;
                let 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 = raismth.base64._utf8_decode(output);
                return output;
        },

        // private method for UTF-8 encoding
        _utf8_encode : function (string) {
                string = string.replace(/\r\n/g,"\n");
                let utftext = "";
                for (let n = 0; n < string.length; n++) {
                        let 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;
        },

        // private method for UTF-8 decoding
        _utf8_decode : function (utftext) {
                let string = "";
                let i = 0;
                let c = 0;
	        let c1 = 0;
	       	let 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;
        }

}

}});


