Xceed Streaming Compression Library Documentation
Examples / Compressing from file to file (Delphi example)
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    Compressing from file to file (Delphi example)
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    Here are two examples for compressing from file to file. One for compression, the other for decompression.

    Delphi - Compression Copy Code

    uses XceedStreamingCompressionLib_TLB 

    var
      xComp : TXceedStreamingCompression; 
      xBZip2 : DXceedBZip2CompressionFormat; 
      vaBytesRead : OleVariant; 
    begin
      xComp := TXceedStreamingCompression.Create( self ); 
      xComp.License( 'your license key' ); 

      xBZip2 := CoXceedBZip2CompressionFormat.Create();  

      try 
        xComp.CompressionFormat := xBZip2; 
        xComp.ProcessFile( 'c:\temp\source.txt', 0, 0, cfpCompress, true,
                           'c:\compressed.cmp', false, vaBytesRead );  

        ShowMessage( 'Compression successful!' ); 

        xComp.Free(); 
      except 
        on xErr : Exception do 
          ShowMessage( xErr.Message ); 
      end; 
    end;

    Delphi - Decompression Copy Code

    uses XceedStreamingCompressionLib_TLB 

    var
      xComp : TXceedStreamingCompression; 
      xBZip2 : DXceedBZip2CompressionFormat; 
      vaBytesRead : OleVariant; 
    begin
      xComp := TXceedStreamingCompression.Create( self ); 
      xComp.License( 'your license key' ); 

      xBZip2 := CoXceedBZip2CompressionFormat.Create(); 
      try 
        xComp.CompressionFormat := xBZip2; 
        xComp.ProcessFile( 'e:\destination.cmp', 0, 0, cfpDecompress, true, 
                           'e:\uncompressed.txt', false, vaBytesRead );  

        ShowMessage( 'Decompression successful!' ); 
        xComp.Free(); 
      except 
        on xErr : Exception do 
          ShowMessage( xErr.Message ); 
      end; 
    end;