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...patch binary files?
Autor: Simon Grossenbacher
Homepage: http://www.swissdelphicenter.ch
[ Print tip ]  

Tip Rating (7):  
     


// Replaces a string in a file with new string.
// Ersetzt eine Zeichenkette in einer Datei mit einer anderen Zeichenkette.

procedure TForm1.Button1Click(Sender: TObject);
var
  
f: file;
  l: Longint;
  FileName, oldstring, newstring, s: string;
begin
  
oldstring := 'old string';
  newstring := 'new string';
  FileName  := 'c:\YourFileName.xyz';
  
  s := oldstring;
  AssignFile(f, FileName);
  Reset(f, 1);
  for l := 0 to FileSize(f) - Length(oldstring) - 1 do
  begin
    
Application.ProcessMessages;
    Seek(f, l);
    BlockRead(f, oldstring[1], Length(oldstring));
    if oldstring = s then
    begin
      
Seek(f, l);
      BlockWrite(f, newstring[1], Length(newstring));
      ShowMessage('String successfully replaced!');
    end;
    Application.ProcessMessages;
  end;
  CloseFile(f);
end;


 

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