{========================================================================}
{=                (c) 1995-98 SwiftSoft Ronald Dittrich                 =}
{========================================================================}
{=                          All Rights Reserved                         =}
{========================================================================}
{=  D 01099 Dresden             = Tel.: +0351-8012255                   =}
{=  Loewenstr.7a                = info@swiftsoft.de                     =}
{========================================================================}
{=  Actual versions on http://www.swiftsoft.de/mmtools.html             =}
{========================================================================}
{=  This code is for reference purposes only and may not be copied or   =}
{=  distributed in any format electronic or otherwise except one copy   =}
{=  for backup purposes.                                                =}
{=                                                                      =}
{=  No Delphi Component Kit or Component individually or in a collection=}
{=  subclassed or otherwise from the code in this unit, or associated   =}
{=  .pas, .dfm, .dcu, .asm or .obj files may be sold or distributed     =}
{=  without express permission from SwiftSoft.                          =}
{=                                                                      =}
{=  For more licence informations please refer to the associated        =}
{=  HelpFile.                                                           =}
{========================================================================}
{=  $Date: 20.01.1998 - 18:00:00 $                                      =}
{========================================================================}
unit MMFFile;

{$I COMPILER.INC}

interface

uses
    Windows,
    SysUtils,
    Controls,
    Classes,
    MMSystem,
    MMObj,
    MMUtils,
    MMString,
    MMSearch;

type
    EMMFastFileError = class(Exception);

    PFileEntry = ^TFileEntry;
    TFileEntry = record
       Name   : String;
       Size   : Longint;
       Offset : Longint;
       Deleted: Boolean;
    end;
    PFileEntryArray = ^TFileEntryArray;
    TFileEntryArray = array[0..0] of TFileEntry;

    PFileHandle = ^TFileHandle;
    TFileHandle = record
       inUse: Boolean;
       Pos  : Longint;
       Size : Longint;
       pfe  : PFileEntry;
    end;
    PFileHandleArray = ^TFileHandleArray;
    TFileHandleArray = array[0..0] of TFileHandle;

    {-- TMMFastFile -----------------------------------------------------}
    TMMFastFile = class(TMMComponent)
    public
       constructor Create(AOwner: TComponent); override;
       destructor  Destroy; override;

       procedure Init;
       procedure Done;
       procedure Pack;

       function  AddFile(const Name: TFileName): TFileName;
       procedure RemoveFile(const Name: TFileName);
       procedure RenameFile(const OldName, NewName: TFileName);
       procedure ExtractFile(const Name, Path: TFileName);

       function  FileExists(const Name: TFileName): Boolean;
       function  FileSize(const Name: TFileName): integer;
       function  FileOpen(const Name: TFileName): PFileHandle;
       procedure FileClose(pfh: PFileHandle);
       function  FileLock(pfh: PFileHandle; pos, size: integer): Pointer;
       procedure FileUnlock(pfh: PFileHandle; pos, size: integer);
       function  FileRead(pfh: PFileHandle; Buffer: PChar; size: integer): integer;
       function  FileSeek(pfh: PFileHandle; pos, origin: integer): integer;

       property  Count: integer read GetCount;
       property  FileEntrys[index: integer]: TFileEntry read GetFileEntrys;
       property  Files[index: integer]: string read GetFiles;
       property  FilesByName[Name: string]: string read GetFilesByName;

    published
       property OnChange: TNotifyEvent read FOnChange write FOnChange;
       property OnHandlesLost: TNotifyEvent read FOnHandlesLost write FOnHandlesLost;

       property FileName: TFileName read FFileName write SetFileName;
       property MaxFiles: integer read FMaxFiles write SetMaxFiles default 50;
       property MaxHandles: integer read FMaxHandles write SetMaxHandles default 10;
    end;

implementation