function base64_encode()

in 2020/lib/eme/encryptedMediaPortability.js [212:242]

• 27 lines of code
• 7 McCabe index (conditional complexity)

function base64_encode(arr) {
  var b64dict = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var b64pad = "=";

  var i;
  var hexStr = "";
  for (i = 0; i < arr.length; i++) {
    var hex = arr[i].toString(16);
    hexStr += hex.length == 1 ? "0" + hex : hex;
  }

  var dest = "";
  var c;
  for (i = 0; i+3 <= hexStr.length; i+=3) {
    c = parseInt(hexStr.substring(i, i+3), 16);
    dest += b64dict.charAt(c >> 6) + b64dict.charAt(c & 63);
  }
  if (i+1 == hexStr.length) {
    c = parseInt(hexStr.substring(i, i+1), 16);
    dest += b64dict.charAt(c << 2);
  } else if (i+2 == hexStr.length) {
    c = parseInt(hexStr.substring(i, i+2), 16);
    dest += b64dict.charAt(c >> 2) + b64dict.charAt((c & 3) << 4);
  }
  
  while ((dest.length & 3) > 0) {
    dest += b64pad;
  }

  return dest;
}