hexToUint8List function

Uint8List hexToUint8List(
  1. String hex
)

Convert hex to binary data */

Implementation

Uint8List hexToUint8List(String hex) {
  if (!(hex is String)) {
    throw 'Expected string containing hex digits';
  }
  if (hex.length % 2 != 0) {
    throw 'Odd number of hex digits';
  }
  var l = hex.length ~/ 2;
  var result = new Uint8List(l);
  for (var i = 0; i < l; ++i) {
    var x = int.parse(hex.substring(i * 2, (2 * (i + 1))), radix: 16);
    if (x.isNaN) {
      throw 'Expected hex string';
    }
    result[i] = x;
  }
  return result;
}