JavaScript Base64 encoder/decoder (minified)

base64.min.js

var base64={table:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",decode:function(t,e,r){function a(t){if(-1==(t=d.indexOf(t.charAt(0))))throw"invalid characater detected in base64.decode";return t}if(!(t=""+t).length)throw"invalid string length in base64.decode";var h,n,i=[],c=t.length,s=0,d=e?this.table.substr(0,62)+"-_":this.table;if(0==c||c%4&&!r)throw"invalid base64 string detected in base64.decode";for(c%4&&r?(s=4-c%4,c-=4):"="==t.charAt(c-1)&&(s="="==t.charAt(c-2)?2:1,c-=4),n=0;c>n;)h=a(t[n++])<<18|a(t[n++])<<12|a(t[n++])<<6|a(t[n++]),i.push(String.fromCharCode(h>>16,h>>8&255,255&h));switch(s){case 1:h=a(t[n++])<<18|a(t[n++])<<12|a(t[n++])<<6,i.push(String.fromCharCode(h>>16,h>>8&255));break;case 2:h=a(t[n++])<<18|a(t[n++])<<12,i.push(String.fromCharCode(h>>16))}return i.join("")},encode:function(t,e,r){function a(t){if((t=t.charCodeAt(0))>255)throw"invalid character detected in base64.encode";return t}if(!(t=""+t).length)throw"invalid string length in base64.encode";var h,n,i=[],c=t.length-t.length%3,s=e?this.table.substr(0,62)+"-_":this.table;for(n=0;c>n;)h=a(t[n++])<<16|a(t[n++])<<8|a(t[n++]),i.push(s.charAt(h>>18)),i.push(s.charAt(h>>12&63)),i.push(s.charAt(h>>6&63)),i.push(s.charAt(63&h));switch(t.length-c){case 1:h=a(t[n])<<16,i.push(s.charAt(h>>18)+s.charAt(h>>12&63)+(r?"":"=="));break;case 2:h=a(t[n])<<16|a(t[++n])<<8,i.push(s.charAt(h>>18)+s.charAt(h>>12&63)+s.charAt(h>>6&63)+(r?"":"="))}return i.join("")}};