Created
May 26, 2011 16:56
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// This code was written by Tyler Akins and has been placed in the | |
// public domain. It would be nice if you left this header intact. | |
// Base64 code from Tyler Akins -- http://rumkin.com | |
var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; | |
function encode64(input) { | |
var output = new StringMaker(); | |
var chr1, chr2, chr3; | |
var enc1, enc2, enc3, enc4; | |
var i = 0; | |
while (i < input.length) { | |
chr1 = input.charCodeAt(i++); | |
chr2 = input.charCodeAt(i++); | |
chr3 = input.charCodeAt(i++); | |
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; | |
} | |
output.append(keyStr.charAt(enc1) + keyStr.charAt(enc2) + keyStr.charAt(enc3) + keyStr.charAt(enc4)); | |
} | |
return output.toString(); | |
} |
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