[lmikle]

Код из моего проекта:

Код:

unit ZLibUtils;

interface

uses
  Windows, SysUtils, Classes, ZLib;
  
function ExpandFile(ASourceFile, ATargetFile : String) : Boolean;
function CompressFile(ASourceFile, ATargetFile : String) : Boolean;

implementation

const
  BUF_SIZE = 512;

function ExpandFile(ASourceFile, ATargetFile : String) : Boolean;
var
  ACount : Integer;
  AZLib : TDeCompressionStream;
  ASource, ATarget : TFileStream;
  ABuf : Array [1..BUF_SIZE] Of Char;
begin
  Result := False;
  If FileExists(ASourceFile) Then
    Try
      ASource := TFileStream.Create(ASourceFile,fmOpenRead);
      Try
        ATarget := TFileStream.Create(ATargetFile,fmCreate Or fmShareExclusive);
        Try
          AZLib := TDeCompressionStream.Create(ASource);
          Try
            Repeat
              ACount := AZLib.Read(ABuf,BUF_SIZE);
              ATarget.Write(ABuf,ACount);
            Until ACount < BUF_SIZE;
            Result := True;
          Finally
            AZLib.Free;
          End;
        Finally
          ATarget.Free;
        End;
      Finally
        ASource.Free;
      End;
    Except
      // Hide all exceptions
    End;
end;

function CompressFile(ASourceFile, ATargetFile : String) : Boolean;
var
  ACount : Integer;
  AZLib : TCompressionStream;
  ASource, ATarget : TFileStream;
  ABuf : Array [1..BUF_SIZE] Of Char;
begin
  Result := False;
  If FileExists(ASourceFile) Then
    Try
      ASource := TFileStream.Create(ASourceFile,fmOpenRead);
      Try
        ATarget := TFileStream.Create(ATargetFile,fmCreate Or fmShareExclusive);
        Try
          AZLib := TCompressionStream.Create(clMax,ATarget);
          Try
            Repeat
              ACount := ASource.Read(ABuf,BUF_SIZE);
              AZLib.Write(ABuf,ACount);
            Until ACount < BUF_SIZE;
            Result := True;
          Finally
            AZLib.Free;
          End;
        Finally
          ATarget.Free;
        End;
      Finally
        ASource.Free;
      End;
    Except
      // Hide all exceptions
    End;
end;

end.