analytics/webcontent/drill/utility.js

/****************************************************************
** Licensed Materials - Property of IBM
**
** IBM Cognos Products: drill
**
** (C) Copyright IBM Corp. 2001, 2010
**
** US Government Users Restricted Rights - Use, duplication or 
** disclosure restricted by GSA ADP Schedule Contract with 
** IBM Corp.
*****************************************************************/
function encode64(inp)
{
	var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
	
	var output = ""; 
	var chr1, chr2, chr3 = ""; 
	var enc1, enc2, enc3, enc4 = "";
	var i = 0;

	do 
	{
		chr1 = inp.charCodeAt(i++); //1st byte.
		chr2 = inp.charCodeAt(i++); //2nd byte.
		chr3 = inp.charCodeAt(i++); //3rd byte.

		enc1 = chr1 >> 2;
		enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
		enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
		enc4 = chr3 & 63;

		if (isNaN(chr2)) 
		{
			enc3 = enc4 = 64;
		} 
		else if (isNaN(chr3)) 
		{
			enc4 = 64;
		}

		// Store the 4 encoded bytes
		output = output + keyStr.charAt(enc1) + keyStr.charAt(enc2) + keyStr.charAt(enc3) +	keyStr.charAt(enc4);

		// clean up variables.
		chr1 = chr2 = chr3 = "";
		enc1 = enc2 = enc3 = enc4 = "";

	} while (i < inp.length);

	//return the encoded value.
	return output;
}