(Delphi DLL) Quoted-Printable Encode/Decode a String

Delphi DLL example to quoted-printable encode and decode a string.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Crypt2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
crypt: HCkCrypt2;
s: PWideChar;
qp: PWideChar;
decoded: PWideChar;
qp: PWideChar;
decoded: PWideChar;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

crypt := CkCrypt2_Create();

// Here's a string in Icelandic using non us-ascii chars:
s := 'Ég get etið gler án þess að meiða mig.';

CkCrypt2_putCryptAlgorithm(crypt,'none');
CkCrypt2_putEncodingMode(crypt,'quoted-printable');

// Quoted-printable encode/decode the iso-8859-1
// representation of the string.  Notice how each
// Icelandic char is represented by 1 byte:
CkCrypt2_putCharset(crypt,'iso-8859-1');
qp := CkCrypt2__encryptStringENC(crypt,s);
Memo1.Lines.Add('iso-8859-1:');
Memo1.Lines.Add(qp);
decoded := CkCrypt2__decryptStringENC(crypt,qp);
Memo1.Lines.Add(decoded);

// Now do the same using utf-8. Notice how each
// Icelandic char is represented by 2 bytes in utf-8:
CkCrypt2_putCharset(crypt,'utf-8');
qp := CkCrypt2__encryptStringENC(crypt,s);
Memo1.Lines.Add('utf-8:');
Memo1.Lines.Add(qp);
decoded := CkCrypt2__decryptStringENC(crypt,qp);
Memo1.Lines.Add(decoded);

CkCrypt2_Dispose(crypt);

end;