$0 in stream and loading as text

[brechi]

You have to write your own component to visualize the text.
Internal PAnsiChar/PWideChar is used and a #0 is the end of the text.

So if you use

Code:

  Memo1.Lines.Text := 'test1'#0'test2'#0;

only the "test1" will be shown.

If you dont want to save your data, then you can load the file into a TMemoryStream (or a string) and replace the #0 with another character.

Code:

var
  s: String;
  fm: TFileStream;
fm := TFileStream.Create;
fm.LoadFromFile('sadasd', fmOpenRead);
setLength(s, fm,size);
fm.Read(s[1], Length(s));
s := StringReplacte(s, #0, #1, [rfReplaceAll]);
memo1.lines.text := s;
etc.

[jaenicke]

Zitat von brechi:

If you dont want to save your data, then you can load the file into a TMemoryStream (or a string) and replace the #0 with another character.

This is only unicode text, so the problem is not to replace those bytes, but to read the file with correct encoding.
If one did it this way and there is only one real unicode character inside, one would get really strange results...

Even if there is no byte order mark this code works perfectly for me:

Delphi-Quellcode:

var
  test: TStringStream;
begin
  test := TStringStream.Create('', TEncoding.Unicode);
  try
    test.LoadFromFile('c:\temp\a.txt');
    ShowMessage(test.DataString);
  finally
    test.Free;
  end;
end;

So it would be better, if you would attach a working sample code with an example file...

[WojTec]

@Sir Rufo, next time I'll be more precise
Data producer is unknown, I just know it is some resource compiler + compiler + linker (mean file is executable). Data is some data, it can be in any format, it can be a string too.

I wrote simple function to check if stream can be Unicode or ANSII:

Delphi-Quellcode:

function GetEncoding(AStream: TStream): TEncoding;
var
  V: Byte;
begin
  Result := TEncoding.ANSI;

  if AStream.Size > 1 then
  begin
    AStream.Position := 1;
    AStream.ReadBuffer(V, 1);
    if V = 0 then
      Result := TEncoding.Unicode
    ;
  end;
end;

Another one, I badly loaded encoded text (LoadFromStream - it was raw data, stupilo ), Append(DataString) is required.

As @brechi told, pointer terminate code is zero in TStrings, so this is main problem. I don't know how jump over it

Also I wrote poor (because very slow) procedure to replace bytes in stream, if someone need it:

Delphi-Quellcode:

procedure ReplaceBytes(AIn: TStream; const AFrom, ATo: Byte; AOut: TStream);
var
  I: Cardinal;
  V: Byte;
begin
  for I := 1 to AIn.Size do
  begin
    AIn.ReadBuffer(V, 1);

    if V = AFrom then
      AOut.WriteBuffer(ATo, 1)
    else
      AOut.WriteBuffer(V, 1)
    ;
  end;
end;