OmnomIRC-node/www/js/btoa.js

/*
	This file is part of OmnomIRC. It is not created by OmnomIRC authors. It is believed that this is in agreement with
	all applicable licenses and restrictions.
*/
/*
 * Text replace stuff
 * 
 * found in omnimaga themes js
 */
function replaceText(text,textarea)
{if(typeof(textarea.caretPos)!="undefined"&&textarea.createTextRange)
{var caretPos=textarea.caretPos;caretPos.text=caretPos.text.charAt(caretPos.text.length- 1)==' '?text+' ':text;caretPos.select();}
else if(typeof(textarea.selectionStart)!="undefined")
{var begin=textarea.value.substr(0,textarea.selectionStart);var end=textarea.value.substr(textarea.selectionEnd);var scrollPos=textarea.scrollTop;textarea.value=begin+ text+ end;if(textarea.setSelectionRange)
{textarea.focus();textarea.setSelectionRange(begin.length+ text.length,begin.length+ text.length);}
textarea.scrollTop=scrollPos;}
else
{textarea.value+=text;textarea.focus(textarea.value.length- 1);}}
function surroundText(text1,text2,textarea)
{if(typeof(textarea.caretPos)!="undefined"&&textarea.createTextRange)
{var caretPos=textarea.caretPos,temp_length=caretPos.text.length;caretPos.text=caretPos.text.charAt(caretPos.text.length- 1)==' '?text1+ caretPos.text+ text2+' ':text1+ caretPos.text+ text2;if(temp_length==0)
{caretPos.moveStart("character",-text2.length);caretPos.moveEnd("character",-text2.length);caretPos.select();}
else
textarea.focus(caretPos);}
else if(typeof(textarea.selectionStart)!="undefined")
{var begin=textarea.value.substr(0,textarea.selectionStart);var selection=textarea.value.substr(textarea.selectionStart,textarea.selectionEnd- textarea.selectionStart);var end=textarea.value.substr(textarea.selectionEnd);var newCursorPos=textarea.selectionStart;var scrollPos=textarea.scrollTop;textarea.value=begin+ text1+ selection+ text2+ end;if(textarea.setSelectionRange)
{if(selection.length==0)
textarea.setSelectionRange(newCursorPos+ text1.length,newCursorPos+ text1.length);else
textarea.setSelectionRange(newCursorPos,newCursorPos+ text1.length+ selection.length+ text2.length);textarea.focus();}
textarea.scrollTop=scrollPos;}
else
{textarea.value+=text1+ text2;textarea.focus(textarea.value.length- 1);}}
/* Cookie functions
 * Copyright (c) by w3schools.com
 * yeah, i am a loser that i look there >.<
 * 
 * 
 */
function setCookie(c_name,value,exdays) {
	var exdate=new Date();
	exdate.setDate(exdate.getDate() + exdays);
	var c_value=escape(value) + ((exdays==null) ? "" : "; expires="+exdate.toUTCString());
	document.cookie=c_name + "=" + c_value;
}
function getCookie(c_name) {
	var i,x,y,ARRcookies=document.cookie.split(";");
	for (i=0;i<ARRcookies.length;i++) {
		x=ARRcookies[i].substr(0,ARRcookies[i].indexOf("="));
		y=ARRcookies[i].substr(ARRcookies[i].indexOf("=")+1);
		x=x.replace(/^\s+|\s+$/g,"");
		if (x==c_name) {
			return unescape(y);
			}
	}
}

/* UTF8 encoding/decoding functions
 * Copyright (c) 2006 by Ali Farhadi.
 * released under the terms of the Gnu Public License.
 * see the GPL for details.
 *
 * Email: ali[at]farhadi[dot]ir
 * Website: http://farhadi.ir/
 */


//an alias of String.fromCharCode
function chr(code)
{
	return String.fromCharCode(code);
}

//returns utf8 encoded charachter of a unicode value.
//code must be a number indicating the Unicode value.
//returned value is a string between 1 and 4 charachters.
function code2utf(code)
{
	if (code < 128) return chr(code);
	if (code < 2048) return chr(192+(code>>6)) + chr(128+(code&63));
	if (code < 65536) return chr(224+(code>>12)) + chr(128+((code>>6)&63)) + chr(128+(code&63));
	if (code < 2097152) return chr(240+(code>>18)) + chr(128+((code>>12)&63)) + chr(128+((code>>6)&63)) + chr(128+(code&63));
}

//it is a private function for internal use in utf8Encode function 
function _utf8Encode(str)
{	
	var utf8str = new Array();
	for (var i=0; i<str.length; i++) {
		utf8str[i] = code2utf(str.charCodeAt(i));
	}
	return utf8str.join('');
}

//Encodes a unicode string to UTF8 format.
function utf8Encode(str)
{	
	var utf8str = new Array();
	var pos,j = 0;
	var tmpStr = '';
	
	while ((pos = str.search(/[^\x00-\x7F]/)) != -1) {
		tmpStr = str.match(/([^\x00-\x7F]+[\x00-\x7F]{0,10})+/)[0];
		utf8str[j++] = str.substr(0, pos);
		utf8str[j++] = _utf8Encode(tmpStr);
		str = str.substr(pos + tmpStr.length);
	}
	
	utf8str[j++] = str;
	return utf8str.join('');
}

//it is a private function for internal use in utf8Decode function 
function _utf8Decode(utf8str)
{	
	var str = new Array();
	var code,code2,code3,code4,j = 0;
	for (var i=0; i<utf8str.length; ) {
		code = utf8str.charCodeAt(i++);
		if (code > 127) code2 = utf8str.charCodeAt(i++);
		if (code > 223) code3 = utf8str.charCodeAt(i++);
		if (code > 239) code4 = utf8str.charCodeAt(i++);
		
		if (code < 128) str[j++]= chr(code);
		else if (code < 224) str[j++] = chr(((code-192)<<6) + (code2-128));
		else if (code < 240) str[j++] = chr(((code-224)<<12) + ((code2-128)<<6) + (code3-128));
		else str[j++] = chr(((code-240)<<18) + ((code2-128)<<12) + ((code3-128)<<6) + (code4-128));
	}
	return str.join('');
}

//Decodes a UTF8 formated string
function utf8Decode(utf8str)
{
	var str = new Array();
	var pos = 0;
	var tmpStr = '';
	var j=0;
	while ((pos = utf8str.search(/[^\x00-\x7F]/)) != -1) {
		tmpStr = utf8str.match(/([^\x00-\x7F]+[\x00-\x7F]{0,10})+/)[0];
		str[j++]= utf8str.substr(0, pos) + _utf8Decode(tmpStr);
		utf8str = utf8str.substr(pos + tmpStr.length);
	}
	
	str[j++] = utf8str;
	return str.join('');
}

/*
 * Copyright (c) 2010 Nick Galbreath
 * http://code.google.com/p/stringencoders/source/browse/#svn/trunk/javascript
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */


/* base64 encode/decode compatible with window.btoa/atob
 *
 * window.atob/btoa is a Firefox extension to convert binary data (the "b")
 * to base64 (ascii, the "a").
 *
 * It is also found in Safari and Chrome.  It is not available in IE.
 *
 * if (!window.btoa) window.btoa = base64.encode
 * if (!window.atob) window.atob = base64.decode
 *
 * The original spec's for atob/btoa are a bit lacking
 * https://developer.mozilla.org/en/DOM/window.atob
 * https://developer.mozilla.org/en/DOM/window.btoa
 *
 * window.btoa and base64.encode takes a string where charCodeAt is [0,255]
 * If any character is not [0,255], then an DOMException(5) is thrown.
 *
 * window.atob and base64.decode take a base64-encoded string
 * If the input length is not a multiple of 4, or contains invalid characters
 *   then an DOMException(5) is thrown.
 */
var base64 = {};
base64.PADCHAR = ',';
base64.ALPHA = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';

base64.makeDOMException = function() {
    // sadly in FF,Safari,Chrome you can't make a DOMException
    var e, tmp;


    try {
        return new DOMException(DOMException.INVALID_CHARACTER_ERR);
    } catch (tmp) {
        // not available, just passback a duck-typed equiv
        // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Objects/Error
        // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Objects/Error/prototype
        var ex = new Error("DOM Exception 5");


        // ex.number and ex.description is IE-specific.
        ex.code = ex.number = 5;
        ex.name = ex.description = "INVALID_CHARACTER_ERR";


        // Safari/Chrome output format
        ex.toString = function() { return 'Error: ' + ex.name + ': ' + ex.message; };
        return ex;
    }
}


base64.getbyte64 = function(s,i) {
    // This is oddly fast, except on Chrome/V8.
    //  Minimal or no improvement in performance by using a
    //   object with properties mapping chars to value (eg. 'A': 0)
    var idx = base64.ALPHA.indexOf(s.charAt(i));
    if (idx === -1) {
        //throw base64.makeDOMException();
    }
    return idx;
}


base64.decode = function(s) {
	
    // convert to string
    s = '' + s;
	s = s.replace("+","-");
	s = s.replace("/","_");
	s = s.replace("=",",");
    var getbyte64 = base64.getbyte64;
    var pads, i, b10;
    var imax = s.length
    if (imax === 0) {
        return s;
    }


    if (imax % 4 !== 0) {
        //throw base64.makeDOMException();
    }


    pads = 0
    if (s.charAt(imax - 1) === base64.PADCHAR) {
        pads = 1;
        if (s.charAt(imax - 2) === base64.PADCHAR) {
            pads = 2;
        }
        // either way, we want to ignore this last block
        imax -= 4;
    }


    var x = [];
    for (i = 0; i < imax; i += 4) {
        b10 = (getbyte64(s,i) << 18) | (getbyte64(s,i+1) << 12) |
            (getbyte64(s,i+2) << 6) | getbyte64(s,i+3);
        x.push(String.fromCharCode(b10 >> 16, (b10 >> 8) & 0xff, b10 & 0xff));
    }


    switch (pads) {
    case 1:
        b10 = (getbyte64(s,i) << 18) | (getbyte64(s,i+1) << 12) | (getbyte64(s,i+2) << 6);
        x.push(String.fromCharCode(b10 >> 16, (b10 >> 8) & 0xff));
        break;
    case 2:
        b10 = (getbyte64(s,i) << 18) | (getbyte64(s,i+1) << 12);
        x.push(String.fromCharCode(b10 >> 16));
        break;
    }
    return s=utf8Decode(x.join(''));
}


base64.getbyte = function(s,i) {
    var x = s.charCodeAt(i);
    if (x > 255) {
        //throw base64.makeDOMException();
    }
    return x;
}


base64.encode = function(s) {
	s=unescape(encodeURIComponent(s));
    if (arguments.length !== 1) {
        throw new SyntaxError("Not enough arguments");
    }
    var padchar = base64.PADCHAR;
    var alpha   = base64.ALPHA;
    var getbyte = base64.getbyte;


    var i, b10;
    var x = [];


    // convert to string
    s = '' + s;


    var imax = s.length - s.length % 3;


    if (s.length === 0) {
        return s;
    }
    for (i = 0; i < imax; i += 3) {
        b10 = (getbyte(s,i) << 16) | (getbyte(s,i+1) << 8) | getbyte(s,i+2);
        x.push(alpha.charAt(b10 >> 18));
        x.push(alpha.charAt((b10 >> 12) & 0x3F));
        x.push(alpha.charAt((b10 >> 6) & 0x3f));
        x.push(alpha.charAt(b10 & 0x3f));
    }
    switch (s.length - imax) {
    case 1:
        b10 = getbyte(s,i) << 16;
        x.push(alpha.charAt(b10 >> 18) + alpha.charAt((b10 >> 12) & 0x3F) +
               padchar + padchar);
        break;
    case 2:
        b10 = (getbyte(s,i) << 16) | (getbyte(s,i+1) << 8);
        x.push(alpha.charAt(b10 >> 18) + alpha.charAt((b10 >> 12) & 0x3F) +
               alpha.charAt((b10 >> 6) & 0x3f) + padchar);
        break;
    }
	s = x.join('');
	s = s.replace("+","-");
	s = s.replace("/","_");
	s = s.replace("=",",");
    return s;
}