Open file as: 10101001101....?

Hi,

"open a file as integer: 101010101010101010?"
 do you mean as bits?

Yes, but can they  be converted to integer or string?

Dennis

just from head, not tested

var
  f : file of integer;
  i : Integer;
begin
  assignfile(f,AFilename);
  rewrite(f);
  for i := 0 to 50 do
    write(f,I);
  closefile(f);
  reset(f);
  seek(f,25); //read the 26th Integervalue
  read(f,i);
  showmessage(IntToStr(i);
  closefile(f);
end;

meikl ;-)

Hi,
 here are 3 functions to convert a byte, word and dword
 to a string of BITS and 1 function to convert a string
 of BITS to INTEGER.
 I don't know if it that what you want.

Function ByteToBit(b : byte) : String;
Var
 z : byte;
Begin
 Result := '';
 For z := 1 to 8 do
 Begin
  IF b AND 128 = 128 then Result := Result + '1'
                     else Result := Result + '0';
  b := b SHL 1;
 End;
End;

Function WordToBit(w : word) : string;
Var
 z : byte;
Begin
 Result := '';
 For z := 1 to 16 do
 Begin
  IF w AND 32768 = 32768 then Result := Result + '1'
                         else Result := Result + '0';
  w := w SHL 1;
 End;
End;

Function DWordToBit(d : dword) : string;
Var
 z : byte;
Begin
 Result := '';
 For z := 1 to 32 do
 Begin
  IF d AND $80000000 = $80000000 then Result := Result + '1'
                                 else Result := Result + '0';
  d := d SHL 1;
 End;
End;

Function BitsToInt(s : string) : Integer;
Var
 z : byte;
Begin
 Result := 0;
 For z := 1 to Length(s) do
 Begin
  IF s[z] = '1' then Result := Result +1;
  IF z <> Length(s) then Result  :=  Result  SHL 1;
 End;
End;

Hi.
I just need a way to open a file, and have it as an integer or string, and then i should be able to save the string/integer back to file. (copy of it)

Dennis

like a hex editor?

Why don't you use TFileStream.  You can open the file as a stream, then you can read bytes from it into a buffer and do anything you want with the buffer.

Does this help?
Eric

I will like it as text, but if u can tell me more about the buffer stuff it would be great!

Dennis

Well, a lot of using a stream is knowing what the data you are reading in will look like.  Do you have a good idea of what you are reading in?

Here are some examples.

Reading an integer:

After defining MyIntBuffer as an Integer, you can execute the following code to read an integer from the stream.

MyFileStream.Read(MyIntBuffer, SizeOf(MyIntBuffer));

Reading a string:

After defining MyCharBuffer as an Array of Char, you can execute the following code to read a string from the stream.  The catch is that you need to know how much to read from the stream.

MyFileStream.Read(MyCharBuffer, NumCharsToRead);

Maybe this will work for you and maybe it's too much work.  You have to decide that.  :)

Eric

Hi.
I need to read all from the stream, is there a way to do that?

Dennis