(* IFL - Interior File Listing Utility

* Copyright 1989 by Martin Pollard. All rights reserved.

*

* IFL produces a listing of files contained in an archive file.

* Archive formats supported by IFL include:

*

* ARC - Developed by System Enhancement Associates

* and enhanced by PKWARE (PKARC & PKPAK)

* and NoGate Consulting (PAK)

* LZH - Developed by Haruyasu Yoshizaki

* ZIP - Developed by PKWARE

* ZOO - Developed by Rahul Dhesi

*

* Version history:

*

* 1.00 02/11/89 Initial release.

* 1.10 02/24/89 1. Added support for archives created with SEA's

* ARC 6.x, which uses new header codes to support

* subdirectory archiving.

* 2. Restructured much of the code, which made no

* operational difference but resulted in a much

* "cleaner" source file.

* 3. Added automatic extension support. IFL will now

* cycle through all supported extensions until it

* finds the desired file.

* 1.20 03/15/89 1. Added ZOO archive support.

* 2. The message line above the headings was changed

* to "Archive <filename> contains the following

* files:". The drive and pathname is no longer

* displayed before the filename.

* 3. Fixed a minor bug in which a non-archive file

* may be mistaken for a ZIP archive file when the

* the first byte is "P" (0x50) but the second is

* not "K" (0x4B).

* 1.30 05/09/89 Added support for archive files created by LHARC

* (LZH format).

* 1.40 07/15/89 1. Made minor code changes to improve performance,

* particularly during automatic extension

* searching.

* 2. Added support for the Imploding compression

* method used in PKZIP v1.00.

* 3. Corrected errors in and updated documentation.

*)

{$A+,B+,E+,F+,I+,L+,N-,O+,R-,S+,V-}

unit file4;

interface

uses

crt, dos,

{rcg11172000 no overlay under Linux.}

{overlay,}

file0, file14,

common;

{rcg11172000 had to change this to get it compiling under Free Pascal...}

{function substall(src,old,new:astr):astr;}

function substall(src,old,_new:astr):astr;

function getbyte(var fp:file):char;

procedure abend(var abort,next:boolean; message:string);

procedure details(var abort,next:boolean);

procedure lfi(fn:astr; var abort,next:boolean);

procedure lfin(rn:integer; var abort,next:boolean);

procedure lfii;

const

L_SIG=$04034b50; {* ZIP local file header signature *}

C_SIG=$02014b50; {* ZIP central dir file header signature *}

E_SIG=$06054b50; {* ZIP end of central dir signature *}

Z_TAG=$fdc4a7dc; {* ZOO entry identifier *}

EXTS=6; {* number of default extensions *}

filext:array[0..EXTS-1] of string[4] = (

'.ZIP', {* ZIP format archive *}

'.ARC', {* ARC format archive *}

'.PAK', {* ARC format archive (PAK.EXE) *}

'.ZOO', {* ZOO format archive *}

'.LZH', {* LZH format archive *}

'.ARK'); {* ARC format archive (CP/M ARK.COM) *}

errmsg:array[0..5] of string[49] = (

'Unable to access specified file',

'Unexpected end of file',

'Unexpected read error',

'Invalid header ID encountered',

'Can''t find next entry in archive',

'File is not in ZIP/ZOO/PAK/LZH/ARC archive format');

method:array[0..15] of string[9] = (

'Directory', {* Directory marker *}

'Unknown! ', {* Unknown compression type *}

'Stored ', {* No compression *}

'Packed ', {* Repeat-byte compression *}

'Squeezed ', {* Huffman with repeat-byte compression *}

'crunched ', {* Obsolete LZW compression *}

'Crunched ', {* LZW 9-12 bit with repeat-byte compression *}

'Squashed ', {* LZW 9-13 bit compression *}

'Crushed ', {* LZW 2-13 bit compression *}

'Shrunk ', {* LZW 9-13 bit compression *}

'Reduced 1', {* Probabilistic factor 1 compression *}

'Reduced 2', {* Probabilistic factor 2 compression *}

'Reduced 3', {* Probabilistic factor 3 compression *}

'Reduced 4', {* Probabilistic factor 4 compression *}

'Frozen ', {* Modified LZW/Huffman compression *}

'Imploded '); {* Shannon-Fano tree compression *}

type

arcfilerec=record {* structure of ARC archive file header *}

filename:array[0..12] of char; {* filename *}

c_size:longint; {* compressed size *}

mod_date:integer; {* last mod file date *}

mod_time:integer; {* last mod file time *}

crc:integer; {* CRC *}

u_size:longint; {* uncompressed size *}

end;

zipfilerec=record {* structure of ZIP archive file header *}

version:integer; {* version needed to extract *}

bit_flag:integer; {* general purpose bit flag *}

method:integer; {* compression method *}

mod_time:integer; {* last mod file time *}

mod_date:integer; {* last mod file date *}

crc:longint; {* CRC-32 *}

c_size:longint; {* compressed size *}

u_size:longint; {* uncompressed size *}

f_length:integer; {* filename length *}

e_length:integer; {* extra field length *}

end;

zoofilerec=record {* structure of ZOO archive file header *}

tag:longint; {* tag -- redundancy check *}

typ:byte; {* type of directory entry (always 1 for now) *}

method:byte; {* 0 = Stored, 1 = Crunched *}

next:longint; {* position of next directory entry *}

offset:longint; {* position of this file *}

mod_date:word; {* modification date (DOS format) *}

mod_time:word; {* modification time (DOS format) *}

crc:word; {* CRC *}

u_size:longint; {* uncompressed size *}

c_size:longint; {* compressed size *}

major_v:char; {* major version number *}

minor_v:char; {* minor version number *}

deleted:byte; {* 0 = active, 1 = deleted *}

struc:char; {* file structure if any *}

comment:longint; {* location of file comment (0 = none) *}

cmt_size:word; {* length of comment (0 = none) *}

fname:array[0..12] of char; {* filename *}

var_dirlen:integer; {* length of variable part of dir entry *}

tz:char; {* timezone where file was archived *}

dir_crc:word; {* CRC of directory entry *}

end;

lzhfilerec=record {* structure of LZH archive file header *}

h_length:byte; {* length of header *}

h_cksum:byte; {* checksum of header bytes *}

method:array[1..5] of char; {* compression type "-lh#-" *}

c_size:longint; {* compressed size *}

u_size:longint; {* uncompressed size *}

mod_time:integer;{* last mod file time *}

mod_date:integer;{* last mod file date *}

attrib:integer; {* file attributes *}

f_length:byte; {* length of filename *}

crc:integer; {* crc *}

end;

outrec=record {* output information structure *}

filename:string[255]; {* output filename *}

date:integer; {* output date *}

time:integer; {* output time *}

typ:integer; {* output storage type *}

csize:longint; {* output compressed size *}

usize:longint; {* output uncompressed size *}

end;

var

accum_csize:longint; {* compressed size accumulator *}

accum_usize:longint; {* uncompressed size accumulator *}

files:integer; {* number of files *}

level:integer; {* output directory level *}

filetype:integer; {* file type (1=ARC,2=ZIP,3=ZOO,4=LZH) *}

out:outrec;

aborted:boolean;

implementation

uses file3;

{rcg11172000 had to change this to get it compiling under Free Pascal...}

{function substall(src,old,new:astr):astr;}

function substall(src,old,_new:astr):astr;

var p:integer;

begin

p:=1;

while p>0 do begin

p:=pos(old,src);

if p>0 then begin

insert(_new,src,p+length(old));

delete(src,p,length(old));

end;

end;

substall:=src;

end;

procedure lbrl(fn:astr; var abort,next:boolean);

var f:file;

c,n,n1:integer;

x:record

st:byte;

name:array[1..8] of char;

ext:array[1..3] of char;

index,len:integer;

fil:array[1..16] of byte;

end;

i:astr;

begin

nl;

assign(f,fn);

reset(f,32);

blockread(f,x,1);

c:=x.len*4-1;

for n:=1 to c do begin

blockread(f,x,1); i:='';

if (x.st=0) and not abort then begin

for n1:=1 to 8 do i:=i+x.name[n1];

i:=i+'.';

for n1:=1 to 3 do i:=i+x.ext[n1];

i:=align(i)+' '+mrn(cstrr(x.len*128.0,10),7);

printacr(i,abort,next);

end;

end;

close(f);

end;

function mnz(l:longint; w:integer):astr;

var s:astr;

begin

s:=cstrl(l);

while length(s)<w do s:='0'+s;

mnz:=s;

end;

function mnr(l:longint; w:integer):astr;

begin

mnr:=mrn(cstrl(l),w);

end;

{*------------------------------------------------------------------------*}

procedure abend(var abort,next:boolean; message:string);

begin

{* abend - Display error message

*}

nl;

sprompt(#3#7+'** '+#3#5+message+#3#7+' **');

nl;

aborted:=TRUE;

abort:=TRUE;

next:=TRUE;

end;

{*------------------------------------------------------------------------*}

procedure details(var abort,next:boolean);

var i,month,day,year,hour,minute,typ:integer;

ampm:char;

ratio:longint;

outp:string;

begin

{* details - Calculate and display details line.

*}

typ:=out.typ;

for i:=1 to length(out.filename) do

out.filename[i]:=upcase(out.filename[i]);

day:=out.date and $1f; {* day = bits 4-0 *}

month:=(out.date shr 5) and $0f; {* month = bits 8-5 *}

year:=((out.date shr 9) and $7f)+80; {* year = bits 15-9 *}

minute:=(out.time shr 5) and $3f; {* minute = bits 10-5 *}

hour:=(out.time shr 11) and $1f; {* hour = bits 15-11 *}

if (month>12) then dec(month,12); {* adjust for month > 12 *}

if (year>99) then dec(year,100); {* adjust for year > 1999 *}

if (hour>23) then dec(hour,24); {* adjust for hour > 23 *}

if (minute>59) then dec(minute,60); {* adjust for minute > 59 *}

if (hour<12) then ampm:='a' else ampm:='p'; {* determine AM/PM *}

if (hour=0) then hour:=12; {* convert 24-hour to 12-hour *}

if (hour>12) then dec(hour,12);

if (out.usize=0) then ratio:=0 else {* ratio is 0% for null-length file *}

ratio:=100-((out.csize*100) div out.usize);

if ratio>99 then ratio:=99;

outp:=#3#4+mnr(out.usize,8)+' '+mnr(out.csize,8)+' '+mnr(ratio,2)+'% '+

#3#9+mrn(method[typ],9)+' '+#3#7+mnr(month,2)+'-'+mnz(day,2)+'-'+

mnz(year,2)+' '+mnr(hour,2)+':'+mnz(minute,2)+ampm+' '+#3#5;

if (level>0) then outp:=outp+mrn('',level); {* spaces for dirs (ARC only)*}

outp:=outp+out.filename;

printacr(outp,abort,next);

if (typ=0) then inc(level) {* bump dir level (ARC only) *}

else begin

inc(accum_csize,out.csize); {* adjust accumulators and counter *}

inc(accum_usize,out.usize);

inc(files);

end;

end;

{*------------------------------------------------------------------------*}

procedure final(var abort,next:boolean);

var outp:string;

ratio:longint;

begin

{* final - Display final totals and information.

*}

if accum_usize=0 then ratio:=0 {* ratio is 0% if null total length *}

else

ratio:=100-((accum_csize*100) div accum_usize);

if ratio>99 then ratio:=99;

outp:=#3#4+mnr(accum_usize,8)+' '+mnr(accum_csize,8)+' '+mnr(ratio,2)+

'% '+#3#5+cstr(files)+' file';

if files<>1 then outp:=outp+'s';

printacr(#3#4+'-------- -------- --- ------------',abort,next);

printacr(outp,abort,next);

end;

{*------------------------------------------------------------------------*}

function getbyte(var fp:file):char;

var buf:array[0..0] of char;

numread:word;

c:char;

abort,next:boolean;

begin

{* getbyte - Obtains character from file pointed to by fp.

* Aborts to DOS on error.

*}

if (not aborted) then begin

blockread(fp,c,1,numread);

if numread=0 then begin

close(fp);

abend(abort,next,errmsg[1]);

end;

getbyte:=c;

end;

end;

{*------------------------------------------------------------------------*}

procedure zip_proc(var fp:file; var abort,next:boolean);

var zip:zipfilerec;

buf:array[0..25] of byte;

signature:longint;

numread:word;

i,stat:integer;

c:char;

begin

{* zip_proc - Process entry in ZIP archive.

*}

while (not aborted) do begin {* set up infinite loop (exit is within loop) *}

blockread(fp,signature,4,numread); if numread<>4 then abend(abort,next,errmsg[2]);

if abort then exit;

if (signature=C_SIG) or (signature=E_SIG) or (aborted) then

exit;

if signature<>L_SIG then

abend(abort,next,errmsg[3]);

if abort then exit;

blockread(fp,zip,26,numread); if numread<>26 then abend(abort,next,errmsg[2]);

if abort then exit;

out.filename:='';

for i:=1 to zip.f_length do {* get filename *}

out.filename[i]:=getbyte(fp);

out.filename[0]:=chr(zip.f_length);

if (zip.e_length>0) then {* skip comment if present *}

for i:=1 to zip.e_length do

c:=getbyte(fp);

out.date:=zip.mod_date;

out.time:=zip.mod_time;

out.csize:=zip.c_size;

out.usize:=zip.u_size;

case zip.method of

0:out.typ:=2; {* Stored *}

1:out.typ:=9; {* Shrunk *}

2,3,4,5:

out.typ:=zip.method+8; {* Reduced *}

6:out.typ:=15; {* Imploded *}

else

out.typ:=1; {* Unknown! *}

end;

details(abort,next); if abort then exit;

{$I-} seek(fp,filepos(fp)+zip.c_size); {$I+} {* seek to next entry *}

if (ioresult<>0) then abend(abort,next,errmsg[4]);

if (abort) then exit;

end;

end;

{*------------------------------------------------------------------------*}

procedure lfi(fn:astr; var abort,next:boolean);

var fp:file;

dirinfo1:searchrec;

lzh:lzhfilerec;

i1,i2,temp,infile,filename,showfn:astr;

zoo_temp,zoo_tag:longint;

numread:word;

i,p,arctype,rcode:integer;

c:char;

begin

fn:=sqoutsp(fn);

if (pos('*',fn)<>0) or (pos('?',fn)<>0) then begin

findfirst(fn,anyfile-directory-volumeid,dirinfo1);

if (doserror=0) then fn:=dirinfo1.name;

end;

if ((exist(fn)) and (not abort)) then begin

arctype:=1;

while (systat.filearcinfo[arctype].ext<>'') and

(systat.filearcinfo[arctype].ext<>copy(fn,length(fn)-2,3)) and

(arctype<7) do

inc(arctype);

if not ((systat.filearcinfo[arctype].ext='') or (arctype=7)) then begin

temp:=systat.filearcinfo[arctype].listline;

if (temp[1]='/') and (temp[2] in ['1'..'4']) and (length(temp)=2) then begin

aborted:=FALSE;

nl;

{ if (not fso) then showfn:=stripname(fn) else showfn:=fn;}

showfn:=stripname(fn);

printacr(#3#3+showfn+':',abort,next);

nl;

if (not abort) then begin

infile:=fn;

assign(fp,infile);

reset(fp,1);

c:=getbyte(fp); {* determine type of archive *}

case c of

#$1a:filetype:=1;

'P':begin

if getbyte(fp)<>'K' then abend(abort,next,errmsg[5]);

filetype:=2;

end;

'Z':begin

for i:=0 to 1 do

if getbyte(fp)<>'O' then abend(abort,next,errmsg[5]);

filetype:=3;

end;

else

begin {* assume LZH format *}

lzh.h_length:=ord(c);

c:=getbyte(fp);

for i:=1 to 5 do lzh.method[i]:=getbyte(fp);

if ((lzh.method[1]='-') and

(lzh.method[2]='l') and

(lzh.method[3]='h')) then

filetype:=4

else

abend(abort,next,errmsg[5]);

end;

end;

reset(fp,1); {* back to start of file *}

p:=0; {* drop drive and pathname *}

{rcg11242000 DOSism.}

{

for i:=1 to length(infile) do

if infile[i] in [':','\'] then p:=i;

}

for i:=1 to length(infile) do

if infile[i] in [':','/'] then p:=i;

filename:=copy(infile,p+1,length(infile)-p);

accum_csize:=0; accum_usize:=0; {* set accumulators to 0 *}

level:=0; files:=0; {* ditto with counters *}

if filetype=3 then begin {* process initial ZOO file header *}

for i:=0 to 19 do {* skip header text *}

c:=getbyte(fp);

{* get tag value *}

blockread(fp,zoo_tag,4,numread);

if numread<>4 then abend(abort,next,errmsg[2]);

if zoo_tag<>Z_TAG then abend(abort,next,errmsg[5]);

{* get data start *}

blockread(fp,zoo_temp,4,numread); if numread<>4 then abend(abort,next,errmsg[2]);

{$I-} seek(fp,zoo_temp); {$I+}

if ioresult<>0 then abend(abort,next,errmsg[4]);

end;

{* print headings *}

printacr(#3#3+' Length Size Now % Method Date Time Filename',abort,next);

printacr(#3#4+'-------- -------- --- --------- -------- ------ ------------',abort,next);

case filetype of

1:arc_proc(fp,abort,next); {* process ARC entry *}

2:zip_proc(fp,abort,next); {* process ZIP entry *}

3:zoo_proc(fp,abort,next); {* process ZOO entry *}

4:lzh_proc(fp,abort,next); {* process LZH entry *}

end;

final(abort,next); {* clean things up *}

close(fp); {* close file *}

end;

nl;

end else begin

nl;

sprompt(#3#3+'Archive '+fn+': '+#3#4+'Please wait....');

temp:=substall(systat.filearcinfo[arctype].listline,'@F',fn);

shelldos(FALSE,temp+' >shell.$$$',rcode);

for i:=1 to 15 do prompt(^H' '^H);

nl;

pfl('shell.$$$',abort,next,TRUE);

assign(fp,'shell.$$$');

{$I-} erase(fp); {$I+}

if (ioresult<>0) then print('Unable to show contents via external viewer.');

end;

end;

end;

end;

procedure lfin(rn:integer; var abort,next:boolean);

var f:ulfrec;

begin

seek(ulff,rn); read(ulff,f);

lfi(memuboard.dlpath+f.filename,abort,next);

end;

procedure lfii;

var f:ulfrec;

fn:astr;

pl,rn:integer;

abort,next,lastarc,lastgif,isgif:boolean;

begin

nl;

sprint(fstring.viewline);

{ sprint(fstring.pninfo);}

nl;

gfn(fn); abort:=FALSE; next:=FALSE;

nl;

recno(fn,pl,rn);

if (baddlpath) then exit;

abort:=FALSE; next:=FALSE; lastarc:=fALSE; lastgif:=FALSE;

while ((rn<>0) and (not abort)) do begin

seek(ulff,rn); read(ulff,f);

isgif:=isgifext(f.filename);

if (isgif) then begin

lastarc:=FALSE;

if (not lastgif) then begin

lastgif:=TRUE;

nl; nl;

printacr(#3#3+'Filename.Ext '+sepr2+' Resolution '+sepr2+

' Num Colors '+sepr2+' Signat.',abort,next);

printacr(#3#4+'=============:============:============:=========',abort,next);

end;

dogifspecs(sqoutsp(memuboard.dlpath+f.filename),abort,next);

end else begin

lastgif:=FALSE;

if (not lastarc) then begin

lastarc:=TRUE;

nl;

(* nl; nl;

printacr(#3#5+'IFL v1.30 '+#3#1+'-'+#3#3+' By Martin Pollard '+

#3#1+'--',abort,next);*)

end;

lfin(rn,abort,next);

end;

nrecno(fn,pl,rn);

if (next) then abort:=FALSE;

next:=FALSE;

end;

close(ulff);

end;

end.