Downchuck/LICENSE.txt

## README.md

      
    Raw
  

              README.md
            
          
    base64 decoder for typed arrays

Forked from https://gist.github.com/1020396 which was inspired by: https://gist.github.com/999166
This requires Uint8Array (ArrayBuffer) support.

  
## annotated.js
function(
   d, // base64 data (in IE7 or older, use .split('') to get this working
   b, // replacement map ("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/")
   h, // typed array subarray method (.subarray || .subset || .slice)
   g,  // result buffer
   c, // character and - ascii value buffer
   u, // bit storage
   r, // result byte counter
   q, // bit counter
   x  // char counter
){
// buffer and character map, not assuming well-formed input.
   g=new Uint8Array(d.length);
   h=g.subarray||g.subset||g.slice;
   b="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
   for (
      // initialize result and counters
      r = 0, q = x = '';
      // get next character
      c = d[x++];
      // character found in table? initialize bit storage and add its ascii value;
      ~c && (u = q%4 ? u*64+c : c,
          // and if not first of each 4 characters, convert the first 8bits to one ascii character
          q++ % 4) ? r += String.fromCharCode(255&u>>(-2*q&6)) : 0
   )
      // try to find character in table (0-63, not found => -1)
      c = b.indexOf(c);
   // return result
   return r
}

## index.js
function(d,b,h,g,c,u,r,q,x){g=new Uint8Array(d.length);h=g.subarray||g.subset||g.slice;b="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";for(r=0,q=x='';c=d[x++];~c&&(u=q%4?u*64+c:c,q++%4)?g[r++]=(255&u>>(-2*q&6)):0)c=b.indexOf(c);return h.call(g,0,r)};

## LICENSE.txt
 Copyright* (C) 2011 Charles Pritchard <chuck@jumis.com>
 Licensed under the Creative Commons Zero License.
 http://creativecommons.org/publicdomain/zero/1.0/

 I, Charles Pritchard, hereby release this work into the public domain.

## package.json
{
  "name": "Base64DecoderTypedArray",

  "description": "Base64 decoder producing a Typed Array",

  "keywords": [
    "base64",
    "decode",
    "padding",
    "rfc2045"
  ]
}

## test.html
<!DOCTYPE html>
<title>Base64 decoder to Typed Array</title>
<script type="text/javascript">

(function(){

var f = function(d,b,h,g,c,u,r,q,x){g=new Uint8Array(d.length);h=g.subarray||g.subset||g.slice;b="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";for(r=0,q=x='';c=d[x++];~c&&(u=q%4?u*64+c:c,q++%4)?g[r++]=(255&u>>(-2*q&6)):0)c=b.indexOf(c);return h.call(g,0,r)};
, test = {
 "Zg==" : "f"
,"Zm8=" : "fo"
,"Zm9v" : "foo"
,"Zm9vYg==" : "foob"
,"Zm9vYmE=" : "fooba"
,"Zm9vYmFy" : "foobar"
,"MTQwYnl0ZX\n   MgcnVsZXMh" : "140bytes rules!"
}
, error = 0;
;

for( i in test ) {
var r = f(i);
if( r != test[i] ) {
error++;
document.writeln( 'Expected &quot;'+test[i]+'&quot; for &quot;'+i+'&quot; but got &quot;'+ r + "&quot;<br>" );
}
}

if( error > 0) {
document.writeln( "<br>"+error+ " tests failed!<br>" );
} else {
document.writeln( "<br>Everything is fine!<br>" );
}

})();


</script>
</body>
</html>
	function(
	d, // base64 data (in IE7 or older, use .split('') to get this working
	b, // replacement map ("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/")
	h, // typed array subarray method (.subarray \|\| .subset \|\| .slice)
	g, // result buffer
	c, // character and - ascii value buffer
	u, // bit storage
	r, // result byte counter
	q, // bit counter
	x // char counter
	){
	// buffer and character map, not assuming well-formed input.
	g=new Uint8Array(d.length);
	h=g.subarray\|\|g.subset\|\|g.slice;
	b="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
	for (
	// initialize result and counters
	r = 0, q = x = '';
	// get next character
	c = d[x++];
	// character found in table? initialize bit storage and add its ascii value;
	~c && (u = q%4 ? u*64+c : c,
	// and if not first of each 4 characters, convert the first 8bits to one ascii character
	q++ % 4) ? r += String.fromCharCode(255&u>>(-2*q&6)) : 0
	)
	// try to find character in table (0-63, not found => -1)
	c = b.indexOf(c);
	// return result
	return r
	}
	Copyright* (C) 2011 Charles Pritchard <chuck@jumis.com>
	Licensed under the Creative Commons Zero License.
	http://creativecommons.org/publicdomain/zero/1.0/

	I, Charles Pritchard, hereby release this work into the public domain.
	{
	"name": "Base64DecoderTypedArray",

	"description": "Base64 decoder producing a Typed Array",

	"keywords": [
	"base64",
	"decode",
	"padding",
	"rfc2045"
	]
	}
	<!DOCTYPE html>
	<title>Base64 decoder to Typed Array</title>
	<script type="text/javascript">

	(function(){

	var f = function(d,b,h,g,c,u,r,q,x){g=new Uint8Array(d.length);h=g.subarray\|\|g.subset\|\|g.slice;b="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";for(r=0,q=x='';c=d[x++];~c&&(u=q%4?u64+c:c,q++%4)?g[r++]=(255&u>>(-2q&6)):0)c=b.indexOf(c);return h.call(g,0,r)};
	, test = {
	"Zg==" : "f"
	,"Zm8=" : "fo"
	,"Zm9v" : "foo"
	,"Zm9vYg==" : "foob"
	,"Zm9vYmE=" : "fooba"
	,"Zm9vYmFy" : "foobar"
	,"MTQwYnl0ZX\n MgcnVsZXMh" : "140bytes rules!"
	}
	, error = 0;
	;

	for( i in test ) {
	var r = f(i);
	if( r != test[i] ) {
	error++;
	document.writeln( 'Expected "'+test[i]+'" for "'+i+'" but got "'+ r + ""<br>" );
	}
	}

	if( error > 0) {
	document.writeln( "<br>"+error+ " tests failed!<br>" );
	} else {
	document.writeln( "<br>Everything is fine!<br>" );
	}

	})();


	</script>
	</body>
	</html>