Dart

Ascii85 Encoding and Decoding

See more Encryption Examples

Demonstrates ascii85 encoding and decoding.

Note: Requires Chilkat v9.5.0.79 or greater.

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // First demonstrate encoding strings to ascii85 and back.
  final sb = CkStringBuilder();

  sb.append('Man is distinguished, not only by his reason, but by this singular passion from other animals, which is a lust of the mind, that by a perseverance of delight in the continued and indefatigable generation of knowledge, exceeds the short vehemence of any carnal pleasure.');

  var encodedAscii85 = sb.getEncoded('ascii85', 'utf-8');
  print(encodedAscii85);

  // Result is: 9jqo^BlbD-BleB1DJ+*+F(f,q/0JhKF<GL>Cj@.4 ... DII?(E,9)oF*2M7/c

  // Decode back to the original:
  sb.clear();
  sb.append(encodedAscii85);
  sb.decode('ascii85', 'utf-8');
  print('Original:');
  print(sb.getAsString());

  // ---- Now encode binary data to ascii85 ----
  final bd = CkBinData();
  bd.loadFile('qa_data/jpg/starfish20.jpg');
  encodedAscii85 = bd.getEncoded('ascii85');
  print(encodedAscii85);

  // Result is:  s4IA0!"_al8O`[\!<E0k!([(is8E!F7VQ[M+Eqj?FED)3+C]U=6"Fn ...

  // Decode...
  bd.clear();
  bd.appendEncoded(encodedAscii85, 'ascii85');
  bd.writeFile('qa_output/starfish20.jpg');
}