archlim.pas

{/////////////////////////////////////////////////////////////////////////
//
//  Dos Navigator Open Source 1.51.08
//  Based on Dos Navigator (C) 1991-99 RIT Research Labs
//
//  This programs is free for commercial and non-commercial use as long as
//  the following conditions are aheared to.
//
//  Copyright remains RIT Research Labs, and as such any Copyright notices
//  in the code are not to be removed. If this package is used in a
//  product, RIT Research Labs should be given attribution as the RIT Research
//  Labs of the parts of the library used. This can be in the form of a textual
//  message at program startup or in documentation (online or textual)
//  provided with the package.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//  1. Redistributions of source code must retain the copyright
//     notice, this list of conditions and the following disclaimer.
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//     documentation and/or other materials provided with the distribution.
//  3. All advertising materials mentioning features or use of this software
//     must display the following acknowledgement:
//     "Based on Dos Navigator by RIT Research Labs."
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//  cannot simply be copied and put under another distribution licence
//  (including the GNU Public Licence).
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//////////////////////////////////////////////////////////////////////////}
{$I STDEFINE.INC}
unit archLIM; {LIM}

interface

uses
  Archiver, Advance, Advance1, Defines, Objects2, Streams, Dos
  ;

type
  PLIMArchive = ^TLIMArchive;
  TLIMArchive = object(TARJArchive)
    constructor Init;
    procedure GetFile; virtual;
    function GetID: Byte; virtual;
    function GetSign: TStr4; virtual;
    end;

type
  LIMHdr = record
    Id: AWord;
    Method: Byte;
    ThreeZeros: array[1..3] of Byte;
    Date: LongInt;
    ThreeSym: array[1..3] of Byte;
    OriginSize: LongInt;
    PackedSize: LongInt;
    Data: LongInt;
    end;

implementation

{ ----------------------------- LIM ------------------------------------}

constructor TLIMArchive.Init;
  var
    Sign: TStr5;
    q: String;
  begin
  Sign := GetSign;
  SetLength(Sign, Length(Sign)-1);
  Sign := Sign+#0;
  FreeStr := SourceDir+DNARC;
  TObject.Init;
  Packer := NewStr(GetVal(@Sign[1], @FreeStr[1], PPacker, 'LIMIT'));
  UnPacker := NewStr(GetVal(@Sign[1], @FreeStr[1], PUnPacker, 'LIMIT'));
  Extract := NewStr(GetVal(@Sign[1], @FreeStr[1], PExtract, 'e'));
  ExtractWP := NewStr(GetVal(@Sign[1], @FreeStr[1], PExtractWP, 'e -p'));
  Add := NewStr(GetVal(@Sign[1], @FreeStr[1], PAdd, 'a -whs'));
  Move := NewStr(GetVal(@Sign[1], @FreeStr[1], PMove, 'm -whs'));
  Delete := NewStr(GetVal(@Sign[1], @FreeStr[1], PDelete, 'Del'));
  Garble := NewStr(GetVal(@Sign[1], @FreeStr[1], PGarble, ''));
  Test := NewStr(GetVal(@Sign[1], @FreeStr[1], PTest, 't'));
  IncludePaths := NewStr(GetVal(@Sign[1], @FreeStr[1], PIncludePaths,
         '-p'));
  ExcludePaths := NewStr(GetVal(@Sign[1], @FreeStr[1], PExcludePaths, ''));
  ForceMode := NewStr(GetVal(@Sign[1], @FreeStr[1], PForceMode, '-y'));
  RecoveryRec := NewStr(GetVal(@Sign[1], @FreeStr[1], PRecoveryRec, ''));
  SelfExtract := NewStr(GetVal(@Sign[1], @FreeStr[1], PSelfExtract, ''));
  Solid := NewStr(GetVal(@Sign[1], @FreeStr[1], PSolid, ''));
  RecurseSubDirs := NewStr(GetVal(@Sign[1], @FreeStr[1],
         PRecurseSubDirs, '-r'));
  SetPathInside := NewStr(GetVal(@Sign[1], @FreeStr[1], PSetPathInside,
         ''));
  StoreCompression := NewStr(GetVal(@Sign[1], @FreeStr[1],
         PStoreCompression, '-m0'));
  FastestCompression := NewStr(GetVal(@Sign[1], @FreeStr[1],
         PFastestCompression, '-ms'));
  FastCompression := NewStr(GetVal(@Sign[1], @FreeStr[1],
         PFastCompression, '-ms'));
  NormalCompression := NewStr(GetVal(@Sign[1], @FreeStr[1],
         PNormalCompression, '-m1'));
  GoodCompression := NewStr(GetVal(@Sign[1], @FreeStr[1],
         PGoodCompression, '-mx'));
  UltraCompression := NewStr(GetVal(@Sign[1], @FreeStr[1],
         PUltraCompression, '-mx'));
  ComprListChar := NewStr(GetVal(@Sign[1], @FreeStr[1], PComprListChar,
         '@'));
  ExtrListChar := NewStr(GetVal(@Sign[1], @FreeStr[1], PExtrListChar,
       '@'));

  q := GetVal(@Sign[1], @FreeStr[1], PAllVersion, '0');
  AllVersion := q <> '0';
  q := GetVal(@Sign[1], @FreeStr[1], PPutDirs, '0');
  PutDirs := q <> '0';
  {$IFNDEF DPMI32}
  q := GetVal(@Sign[1], @FreeStr[1], PShortCmdLine, '1');
  ShortCmdLine := q <> '0';
  {$ELSE}
  q := GetVal(@Sign[1], @FreeStr[1], PSwapWhenExec, '0');
  SwapWhenExec := q <> '0';
  {$ENDIF}
  {$IFNDEF OS2}
  q := GetVal(@Sign[1], @FreeStr[1], PUseLFN, '0');
  UseLFN := q <> '0';
  {$ENDIF}
  end { TLIMArchive.Init };

function TLIMArchive.GetID;
  begin
  GetID := arcLIM;
  end;

function TLIMArchive.GetSign;
  begin
  GetSign := sigLIM;
  end;

procedure TLIMArchive.GetFile;
  var
    i: AWord;
    P: LIMHdr;
    C: Char;
  label 1;

  procedure GetName;
    begin
    i := 1;
    FileInfo.FName := '';
    C := #1;
    while (i < 80) and (C <> #0)
         and not Abort and (ArcFile^.Status = stOK)
    do
      begin
      ArcFile^.Read(C, 1);
      if C <> #0 then
        FileInfo.FName := FileInfo.FName+C;
      Inc(i);
      end;
    end;

  begin { TLIMArchive.GetFile }
1:
  ArcFile^.Read(P, 4);
  if  (ArcFile^.Status = stOK) and (P.Id = $F813) and (P.Method = 5)
  then
    begin
    FileInfo.Last := 1;
    Exit;
    end;
  if  (ArcFile^.Status = stOK) and (P.Id = $D180)
  then
    begin
    GetName;
    CDir := FileInfo.FName;
    goto 1;
    end;
  if  (ArcFile^.Status <> stOK) or (P.Id <> $f123) then
    begin
    FileInfo.Last := 2;
    Exit;
    end;
  ArcFile^.Read(P.ThreeZeros[2], SizeOf(P)-4);
  if  (ArcFile^.Status <> stOK) then
    begin
    FileInfo.Last := 2;
    Exit;
    end;
  {if (P.Method > 20) then begin FileInfo.Last:=2;Exit;end;}
  FileInfo.Last := 0;
  FileInfo.Attr := 0;
  FileInfo.USize := P.OriginSize;
  FileInfo.PSize := P.PackedSize;
  FileInfo.Date := P.Date {P.Date shl 16) or (P.Date shr 16)};
  GetName;
  FileInfo.FName := CDir+'/'+FileInfo.FName; // slash change by unxed
  if P.ThreeZeros[3] and Directory <> 0 then
    goto 1;
  ArcFile^.Seek(ArcFile^.GetPos+P.PackedSize);
  end { TLIMArchive.GetFile };

end.