freepascal.compiler/fcl/tests/mstream.pp

Program TestStream;

uses objpas, classes;

Var Stream : TMemoryStream;
    S,T : String;
   
begin
  S:='ABCDEFGHIJKLMNOPQRSTUVWXYZ';
  T:=S;
  Writeln ('Creating stream.');
  Stream:=TMemoryStream.Create;
  Writeln ('Initial Size : ',Stream.Size);
  Writeln ('Initial Capacity : ',Stream.Capacity);
  Writeln ('Initial Position : ',Stream.Position);
  Stream.WriteByte  (1);
  Stream.WriteWord  (2);
  Stream.WriteDWord (3);
  Stream.WriteBuffer (S[1],Length(S));
  Writeln ('Stream Size is : ',Stream.Size);
  Writeln ('Streem Capacity is : ',STream.Capacity);
  Stream.Seek(0,soFromBeginning);
  If Stream.ReadByte<>1 then  Writeln ('First byte not 1');
  If Stream.ReadWord<>2 then  Writeln ('First word not 2');
  If Stream.ReadDWord<>3 then Writeln ('First Word not 3');
  If Stream.Read(T[1],Length(S))<>Length(S) then Writeln ('Couldn''t read string.');
  Stream.WriteByte  (1);
  Stream.WriteWord  (2);
  Stream.WriteDWord (3);
  Stream.WriteBuffer (S[1],Length(S));
  Writeln ('Stream Size is : ',Stream.Size);
  Writeln ('Streem Capacity is : ',STream.Capacity);
  Stream.SaveToFile('Test2.dat');
  Stream.Free;
end.