base64.min.js

/*
 * 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.
 */
var base64={};base64.PADCHAR='=';base64.ALPHA='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';base64.makeDOMException=function(){var e,tmp;try{return new DOMException(DOMException.INVALID_CHARACTER_ERR)}catch(tmp){var a=new Error("DOM Exception 5");a.code=a.number=5;a.name=a.description="INVALID_CHARACTER_ERR";a.toString=function(){return'Error: '+a.name+': '+a.message};return a}};base64.getbyte64=function(s,i){var a=base64.ALPHA.indexOf(s.charAt(i));if(a===-1){throw base64.makeDOMException();}return a};base64.decode=function(s){s=''+s;var a=base64.getbyte64;var b,i,b10;var c=s.length;if(c===0){return s}if(c%4!==0){throw base64.makeDOMException();}b=0;if(s.charAt(c-1)===base64.PADCHAR){b=1;if(s.charAt(c-2)===base64.PADCHAR){b=2}c-=4}var x=[];for(i=0;i<c;i+=4){b10=(a(s,i)<<18)|(a(s,i+1)<<12)|(a(s,i+2)<<6)|a(s,i+3);x.push(String.fromCharCode(b10>>16,(b10>>8)&0xff,b10&0xff))}switch(b){case 1:b10=(a(s,i)<<18)|(a(s,i+1)<<12)|(a(s,i+2)<<6);x.push(String.fromCharCode(b10>>16,(b10>>8)&0xff));break;case 2:b10=(a(s,i)<<18)|(a(s,i+1)<<12);x.push(String.fromCharCode(b10>>16));break}return x.join('')};base64.getbyte=function(s,i){var x=s.charCodeAt(i);if(x>255){throw base64.makeDOMException();}return x};base64.encode=function(s){if(arguments.length!==1){throw new SyntaxError("Not enough arguments");}var a=base64.PADCHAR;var b=base64.ALPHA;var c=base64.getbyte;var i,b10;var x=[];s=''+s;var d=s.length-s.length%3;if(s.length===0){return s}for(i=0;i<d;i+=3){b10=(c(s,i)<<16)|(c(s,i+1)<<8)|c(s,i+2);x.push(b.charAt(b10>>18));x.push(b.charAt((b10>>12)&0x3F));x.push(b.charAt((b10>>6)&0x3f));x.push(b.charAt(b10&0x3f))}switch(s.length-d){case 1:b10=c(s,i)<<16;x.push(b.charAt(b10>>18)+b.charAt((b10>>12)&0x3F)+a+a);break;case 2:b10=(c(s,i)<<16)|(c(s,i+1)<<8);x.push(b.charAt(b10>>18)+b.charAt((b10>>12)&0x3F)+b.charAt((b10>>6)&0x3f)+a);break}return x.join('')};