Base64 encode data

Base64 encode data is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

Write an algorithm that converts a byte array or string, and output that base64'd string. Try to base64'd any string and if possible this favicon

JavaScript

<lang JavaScript>(function(){function stringToArrayUnicode(str){for(var i=0,l=str.length,n=[];i<l;i++)n.push(str.charCodeAt(i));return n;} function generateOnesByLength(n){//Attempts to generate a binary number full of ones given a length.. they don't redefine each other that much. var x=0; for(var i=0;i<n;i++){ x<<=1;x|=1;//I don't know if this is performant faster than Math.pow but seriously I don't think I'll need Math.pow, do I? } return x; } function paf(_offset,_offsetlength,_number){//I don't have any name for this function at ALL, but I will explain what it does, it takes an offset, a number and returns the base64 number and the offset of the next number. //the next function will be used to extract the offset of the number.. var a=6-_offsetlength,b=8-a;//Oh god, 8 is HARDCODED! Because 8 is the number of bits in a byte!!! //And 6 is the mini-byte used by wikipedia base64 article... at least on 2013. //I imagine this code being read in 2432 or something, that probably won't happen.. return [_number&generateOnesByLength(b),b,(_offset<<a)|(_number>>b)];//offset & offsetlength & number } function toBase64(uint8array){//of bits, each value may not have more than 255 bits... //a normal "array" should work fine too.. //From 0x29 to 0x5a plus from 0x61 to 0x7A AND from 0x30 to 0x39 //Will not report errors if an array index has a value bigger than 255.. it will likely fail. var a=[],i,output=[]; for(i=0x41;i<=0x5a;i++){//A-Z a.push(String.fromCharCode(i)); } for(i=0x61;i<=0x7A;i++){//a-z a.push(String.fromCharCode(i)); } for(i=0x30;i<=0x39;i++){//0-9 a.push(String.fromCharCode(i)); } a.push('+','/'); var offset=0,offsetLength=0,x; for(var i=0,l=uint8array.length;i<l;i++){ if(offsetLength==6){//if offsetlength is 6 that means that a whole offset is occupying the space of a byte, can you believe it. offsetLength=0; output.push(a[offset]); offset=0; i--; continue; } x=paf(offset,offsetLength,uint8array[i]); offset=x[0]; offsetLength=x[1]; output.push(a[x[2]]); } if(offsetLength){ if(offsetLength==6){ output.push(a[offset]); }else{ var y=(6-offsetLength)/2; x=paf(offset,offsetLength,0); offset=x[0]; output.push(a[x[2]]); switch (y){ case 2:output.push('=');//This thingy right here, you know.. the offsets also, no break statement; case 1:output.push('=');break; } }} return output.join();//You can change it so the result is an array instead!!!! }

//Usage

return toBase64(stringToArrayUnicode("Nothing seems hard to the people who don't know what they're talking about.")) }())</lang>