Category : Utilities for DOS and Windows Machines
Archive   : 4UTILS83.ZIP
Filename : SCANLZHF.PAS

UNIT ScanLZHFiles;
{$V-}
(* ----------------------------------------------------------------------
Part of 4DESC - A Simple 4DOS File Description Editor
and 4FF - 4DOS File Finder

(c) 1992, 1993 Copyright by David Frey,
Urdorferstrasse 30
8952 Schlieren ZH
Switzerland

DISCLAIMER: This unit is freeware: you are allowed to use, copy
and change it free of charge, but you may not sell or hire
this part of 4DESC. The copyright remains in our hands.

If you make any (considerable) changes to the source code,
please let us know. (send a copy or a listing).
We would like to see what you have done.

We, David Frey and Tom Bowden, the authors, provide absolutely
no warranty of any kind. The user of this software takes the
entire risk of damages, failures, data losses or other
incidents.


Code created using Turbo Pascal 6.0 (c) Borland International 1990

This unit provides the extraction of file names in .LZH files.

----------------------------------------------------------------------- *)

INTERFACE USES Dos, Globals;

PROCEDURE SearchInLZHFile(FileSpec: FileSpecArrayType; FileSpecs: BYTE;
VAR Dir: PathStr; VAR lhsearch: SearchRec);
PROCEDURE ShowCompLZHFileData(VAR search,lhsearch: SearchRec;VAR Path: PathStr;
csize: LONGINT);

VAR OldLHFileName: PathStr;

IMPLEMENTATION USES Objects, Drivers, StringDateHandling;

PROCEDURE SearchInLZHFile(FileSpec: FileSpecArrayType; FileSpecs: BYTE;
VAR Dir: PathStr; VAR lhsearch: SearchRec);

VAR i : WORD;
k, Dummy : BYTE;
LHAFile : NameExtStr;

BEGIN (* SearchInLZHFile *)
Assign(f,lhsearch.Name); Reset(f,1);

BlockRead(f,Buffer^,BufSize,BytesRead); BufPtr := 2; FilePtr := 2;
(* first 2 unknown bytes skipped *)
REPEAT
s := '';
REPEAT
s := s+Chr(ReadByte);
UNTIL (Pos('-lh',s) > 0) OR (BufPtr > BytesRead);
Dummy := ReadByte; Dummy := ReadByte; (* overread Method *)

IF BufPtr < BytesRead THEN
BEGIN
csize := LONGINT(ReadByte) SHL 24 + LONGINT(ReadByte) SHL 16 + LONGINT(ReadByte) SHL 8 + ReadByte;
Search.size := LONGINT(ReadByte) SHL 24 + LONGINT(ReadByte) SHL 16 + LONGINT(ReadByte) SHL 8 + ReadByte;
Search.time := LONGINT(ReadByte) SHL 24 + LONGINT(ReadByte) SHL 16 + LONGINT(ReadByte) SHL 8 + ReadByte;
Search.attr := ReadByte;
Dummy := ReadByte; (* unknown 2 *)

WITH Search DO
BEGIN
name := ''; FOR i := 1 TO ReadByte DO name := name+DownCase(Chr(ReadByte));
END;

FOR k := 1 TO FileSpecs DO
BEGIN
FSplit(FileSpec[k],Path,name,ext);
WHILE Length(name) < 8 DO name := name+' ';
IF Ext = '' THEN Ext := '. '
ELSE
WHILE Length(ext) < 4 DO ext := ext+' ';


i := Pos('*',name);
IF i > 0 THEN
WHILE i <= 8 DO
BEGIN
name[i] := '?'; INC(i);
END;

i := Pos('*',ext);
IF i > 0 THEN
WHILE i <= 4 DO
BEGIN
ext[i] := '?'; INC(i);
END;
FileSpec[k] := Path+name+ext;

FSplit(Search.Name,Path,name,ext);
WHILE Length(name) < 8 DO name := name +' ';
IF Ext = '' THEN Ext := '. '
ELSE
WHILE Length(ext) < 4 DO ext := ext+' ';
LHAFile:= Path+name+ext;

i := 1;
WHILE ((FileSpec[k][i] = '?') OR (FileSpec[k][i] = LHAFile[i])) AND
(i<12) DO
INC(i);

IF ((ExactAttr AND (Search.Attr = Attr)) OR (NOT ExactAttr)) AND
(FileSpec[k][i] = '?') OR (FileSpec[k][i] = LHAFile[i]) THEN
ShowCompLZHFileData(search,lhsearch,Dir,csize);
END;

INC(BufPtr,csize); INC(FilePtr,csize);
IF BufPtr >= BufSize THEN
BEGIN
Seek(f,FilePtr);
BlockRead(f,Buffer^,BufSize,BytesRead); BufPtr := 0;
END;
END;
UNTIL BufPtr >= BytesRead;

Close(f);
END; (* SearchInLZHFile *)

PROCEDURE ShowCompLZHFileData(VAR search,lhsearch: SearchRec;VAR Path: PathStr;
csize: LONGINT);

BEGIN
IF NOT BareOutput THEN
BEGIN
IF FileCount = 0 THEN
BEGIN
WriteLn(Output); IF DoPage THEN TestForMoreMsg;
WriteLn(Output,Path); IF DoPage THEN TestForMoreMsg;
END;

IF lhsearch.Name <> OldLHFileName THEN
BEGIN
DownString(lhsearch.Name); OldLHFileName := lhsearch.Name;

InfoArray[0] := @lhsearch.Name;

SizeStr := FormattedLongIntStr(lhsearch.Size,8);
InfoArray[1] := @SizeStr;

UnpackTime(lhsearch.Time,DateRec);
Date := FormDate(DateRec); Time := FormTime(DateRec);
InfoArray[2] := @Date;
InfoArray[3] := @Time;

AttrStr := '....';
IF lhSearch.Attr AND Archive = Archive THEN AttrStr[1] := 'a';
IF lhSearch.Attr AND Hidden = Hidden THEN AttrStr[2] := 'h';
IF lhSearch.Attr AND SysFile = SysFile THEN AttrStr[3] := 's';
IF lhSearch.Attr AND ReadOnly = ReadOnly THEN AttrStr[4] := 'r';
InfoArray[4] := @AttrStr;

FormatStr(s,'(%-12s %8s '+DateTempl+' '+TimeTempl+' %4s)',InfoArray);
WriteLn(Output,s); IF DoPage THEN TestForMoreMsg;
END;

InfoArray[0] := @search.Name;

SizeStr := FormattedLongIntStr(search.Size,8);
InfoArray[1] := @SizeStr;

UnpackTime(search.Time,DateRec);
Date := FormDate(DateRec); Time := FormTime(DateRec);
InfoArray[2] := @Date;
InfoArray[3] := @Time;

(* AttrStr := '----';
IF Search.Attr AND Archive = Archive THEN AttrStr[1] := 'a';
IF Search.Attr AND Hidden = Hidden THEN AttrStr[2] := 'h';
IF Search.Attr AND SysFile = SysFile THEN AttrStr[3] := 's';
IF Search.Attr AND ReadOnly = ReadOnly THEN AttrStr[4] := 'o'
ELSE AttrStr[4] := 'w';
InfoArray[4] := LONGINT(@AttrStr);

FormatStr(s,'+ %-12s %8s '+DateTempl+' '+TimeTempl+' %4s',InfoArray); *)
FormatStr(s,'+ %-12s %8s '+DateTempl+' '+TimeTempl,InfoArray);
WriteLn(Output,s); IF DoPage THEN TestForMoreMsg;

INC(TotalSize,csize); INC(DirSize,csize);
INC(TotalFileCount); INC(FileCount);
END;
END; (* ShowFileData *)

END.