Compressing text files

Hi,
just look at zlib compression unit in the extras folder of your delphi cd,it also comes with example of compressing files.

compressing text with ZLIB:

const
  BufferSize = 4096;

var
  functions: Tfunctions;

  BufferZ: array[0..BufferSize-1] of Byte;
  InFile: TStringStream;
  OutFile: TStringStream;
  ZStream: TCustomZLibStream;

function TFunctions.CompressText(Tex: string): string;
begin
  InFile := TStringStream.Create(Tex);
  try
    OutFile := TStringStream.Create('');
    try
      ZStream := TCompressionStream.Create( clFastest, OutFile);
      try
        ZStream.CopyFrom(InFile, 0);
      finally
        ZStream.Free;
      end;
    finally
    Result:= OutFile.DataString;
      OutFile.Free;
    end;
  finally
    InFile.Free;
  end;
end;

function TFunctions.DeCompressText(Tex: string): string;
var Count: Integer;
begin
  InFile :=  TStringStream.Create(Tex);
  try
    OutFile := TStringStream.Create('');
    try
      ZStream := TDecompressionStream.Create(InFile);
      try
        while True do
          begin
            Count := ZStream.Read(BufferZ, BufferSize);
            if Count <> 0 then OutFile.WriteBuffer(BufferZ, Count) else Break;
          end;
      finally
        ZStream.Free;
      end;
    finally
    Result:= OutFile.DataString;
      OutFile.Free;
    end;
  finally
    InFile.Free;
  end;
end;

-------

with a little changes you can use it also with files.. using TFileStream

---

if you don't want to use zlib and make everything for your own.. you can learn how zlib works..
the only things I can teach you are RLA and HUFFMAN compression..
huffman is quite good

Motaz: can you mail me that unit
p0seidon@extended.de

thx

Can you send me that Unit please
 to dreamvb@yahoo.com

  Thanks
       Motaz

can i have it too ?

brian7@teleline.es

thanks

Hi Motaz,

I'm very interested at you original code to turbo pascal. I'm looking for a zip/unzip code  to turbo pascal too. Have it you ?

Thanks, Radler( roger@ars.com.br )