archzxz.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.
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//////////////////////////////////////////////////////////////////////////}
{$I STDEFINE.INC}
unit archZXZ; {ZXZ}

interface

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

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

type
  ZXZHdr = record
    Name: array[0..7] of Char;
    Extension: array[0..2] of Char;
    OriginSize: AWord;
    SectorSize: Byte;
    PackedSize: AWord;
    CRC32: LongInt;
    MethodID: Byte;
    Flags: Byte;
    end;

implementation

{ ------------------------------ ZXZip aka $Z ----------------------------- }

constructor TZXZArchive.Init;
  var
    Sign: TStr5;
    q: String;
  begin
  Sign := GetSign;
  SetLength(Sign, Length(Sign)-1);
  Sign := Sign+#0;
  FreeStr := SourceDir+DNARC;
  TObject.Init;
  {$IFNDEF OS2}
  Packer := NewStr(GetVal(@Sign[1], @FreeStr[1], PPacker, 'ZXZIP386'));
  UnPacker := NewStr(GetVal(@Sign[1], @FreeStr[1], PUnPacker, 'ZXUNZIP'));
  {$ELSE}
  Packer := NewStr(GetVal(@Sign[1], @FreeStr[1], PPacker, 'ZXZIP2'));
  UnPacker := NewStr(GetVal(@Sign[1], @FreeStr[1], PUnPacker, 'ZXUNZIP2'));
  {$ENDIF}
  Extract := NewStr(GetVal(@Sign[1], @FreeStr[1], PExtract, ''));
  ExtractWP := NewStr(GetVal(@Sign[1], @FreeStr[1], PExtractWP, ''));
  Add := NewStr(GetVal(@Sign[1], @FreeStr[1], PAdd, '-start8224'));
  Move := NewStr(GetVal(@Sign[1], @FreeStr[1], PMove, ''));
  Delete := NewStr(GetVal(@Sign[1], @FreeStr[1], PDelete, ''));
  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, ''));
  ExcludePaths := NewStr(GetVal(@Sign[1], @FreeStr[1], PExcludePaths, ''));
  ForceMode := NewStr(GetVal(@Sign[1], @FreeStr[1], PForceMode, ''));
  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,
         ''));
  SetPathInside := NewStr(GetVal(@Sign[1], @FreeStr[1], PSetPathInside,
         ''));
  StoreCompression := NewStr(GetVal(@Sign[1], @FreeStr[1],
         PStoreCompression, ''));
  FastestCompression := NewStr(GetVal(@Sign[1], @FreeStr[1],
         PFastestCompression, ''));
  FastCompression := NewStr(GetVal(@Sign[1], @FreeStr[1],
         PFastCompression, ''));
  NormalCompression := NewStr(GetVal(@Sign[1], @FreeStr[1],
         PNormalCompression, ''));
  GoodCompression := NewStr(GetVal(@Sign[1], @FreeStr[1],
         PGoodCompression, ''));
  UltraCompression := NewStr(GetVal(@Sign[1], @FreeStr[1],
         PUltraCompression, ''));
  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 { TZXZArchive.Init };

function TZXZArchive.GetID;
  begin
  GetID := arcZXZ;
  end;

function TZXZArchive.GetSign;
  begin
  GetSign := sigZXZ;
  end;

procedure TZXZArchive.GetFile;
  var
    FP: TFileSize;
    P: ZXZHdr;
    Len: AWord;
  begin
  ArcFile^.Read(P, SizeOf(P));
  FP := ArcFile^.GetPos;
  if  (ArcFile^.Status <> stOK) or (FP > 65280) then
    begin
    FileInfo.Last := 2;
    Exit;
    end;
  if  (P.Name[0] < #32) or
      (P.PackedSize > P.SectorSize*256) or
      ( (P.PackedSize+FP-SizeOf(P)-17) > ArcFile^.GetSize) or
      (P.MethodID > 3) or
      (P.SectorSize = 0)
  then
    begin
    FileInfo.Last := 1;
    Exit;
    end;
  FileInfo.FName := P.Name;
  DelRight(FileInfo.FName);
  if  (P.Extension[0] <> 'B') and
      (P.Extension[1] >= #32) and (P.Extension[1] <= #127) and
      (P.Extension[2] >= #32) and (P.Extension[2] <= #127)
  then
    FileInfo.FName := FileInfo.FName+'.'+P.Extension
  else
    FileInfo.FName := FileInfo.FName+'.'+P.Extension[0];
  DelRight(FileInfo.FName);
  FileInfo.Last := 0;
  FileInfo.Attr := 0;
  if  (P.OriginSize and $ff) = 0 then
    Len := 0
  else
    Len := 256;
  Len := Trunc((Len+P.OriginSize)/256);
  if Len <> P.SectorSize then
    Len := P.SectorSize*256
  else
    begin
    Len := P.OriginSize;
    if P.Extension[0] = 'B' then
      Len := 4+Ord(P.Extension[1])+Ord(P.Extension[2])*256;
    end;
  FileInfo.USize := LongInt(Len);
  FileInfo.PSize := LongInt(P.PackedSize);
  FileInfo.Date := 0;
  ArcFile^.Seek(FP+P.PackedSize);
  end { TZXZArchive.GetFile };

end.