Lazarus Pascal Requires Chilkat v11.2.0+

Base62 Encoding and Decoding

Demonstrates base62 encoding and decoding. Lazarus Pascal

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.BinData,
  Chilkat.StringBuilder;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  bd: TBinData;
  base62_encoded: string;
  sb: TStringBuilder;

begin
  bd := TBinData.Create;

  //  Base62 encode.
  bd.AppendString('hello world','utf-8');
  base62_encoded := bd.GetEncoded('base62');
  WriteLn('hello world --> ' + base62_encoded);

  //  Output: 
  //  hello world --> AAwf93rvy4aWQVw

  //  Base62 decode
  sb := TStringBuilder.Create;
  sb.DecodeAndAppend('AAwf93rvy4aWQVw','base62','utf-8');
  WriteLn('decoded: ' + sb.GetAsString());

  //  Output:
  //  decoded: hello world


  bd.Free;
  sb.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.