Probleme beim Stream Laden

[Jens Schumann]

Hallo,
in grauer Vorzeit habe ich mir für das Lesen und Schreiben von Strings in einen Stream zwei Nachfahren gebastelt.

Delphi-Quellcode:

uses Sysutils, Classes;

Type

  TMemoryStreamExt  = class(TMemoryStream)
  public
    procedure WriteStringToStream(aStr : String);
    function  ReadStringFromStream : String;
  end;

  TFileStreamExt = class(TFilestream)
  public
    procedure WriteStringToStream(aStr : String);
    function  ReadStringFromStream : String;
  end;



implementation


{ TFileStreamExt }

procedure TFileStreamExt.WriteStringToStream(aStr : String);
var
   aStrLen : Integer;
begin
  aStrLen:=Length(aStr);
  WriteBuffer(aStrLen,SizeOf(Integer));
  WriteBuffer(Pointer(aStr)^,aStrLen);
end;

function TFileStreamExt.ReadStringFromStream: String;
var
   aStrLen : Integer;
begin
  ReadBuffer(aStrLen,SizeOf(Integer));
  SetLength(Result,aStrLen);
  ReadBuffer(Pointer(Result)^,aStrLen);
end;

{ TMemoryStreamExt }

function TMemoryStreamExt.ReadStringFromStream: String;
var
   aStrLen : Integer;
begin
  ReadBuffer(aStrLen,SizeOf(Integer));
  SetLength(Result,aStrLen);
  ReadBuffer(Pointer(Result)^,aStrLen);
end;

procedure TMemoryStreamExt.WriteStringToStream(aStr: String);
var
   aStrLen : Integer;
begin
  aStrLen:=Length(aStr);
  WriteBuffer(aStrLen,SizeOf(Integer));
  WriteBuffer(Pointer(aStr)^,aStrLen);
end;


end.

In der richtigen Reihenfolge muss natürlich auch hier gelesen werden.