summaryrefslogtreecommitdiff
path: root/docview/src/docdump/readtoc.pas
blob: d0b74c5b3d68885ae7e6c2363b1b04f820d1c3b8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
{
  Dump the Table of Contents data
}
unit readtoc;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, filestreamhelper;

procedure ProcessTOC(AIn: TFileStream; AOut: TFileTextStream);

implementation

uses
  IPFFileFormatUnit, readheader, u_Tools;

type
  TTOCOverlay = bitpacked record
    length: uint8; // length of the entry including this byte (but not including extended data)
    nestlevel: Unsigned_4;
    unknown: boolean;
    extended: boolean;
    hidden: boolean;
    haschildren: boolean;
    numSlots: uint8; // number of "slots" occupied by the text for this toc entry
  end;


  TTOCExtendedOverlay = bitpacked record
    setPos: boolean;
    setSize: boolean;
    setView: boolean;
    setStyle: boolean;
    noSearch: boolean;
    noPrint: boolean;
    setCtrl: boolean;
    setTutor: boolean;
    clear: boolean;
    unknown1: Unsigned_1;
    setGroup: boolean;
    isParent: boolean;
    unknown2: Unsigned_4;
  end;


procedure ProcessTOC(AIn: TFileStream; AOut: TFileTextStream);
var
  Count: integer;
  VisCount: integer;
  pOffsets: UInt32ArrayPointer;
  toc: TTOCEntryStart;
  olay: TTOCOverlay;
  tocextolay: TTOCExtendedOverlay;
  pData: pointer;
  pEntry: pTTOCEntryStart;
  pExtendedInfo: pExtendedTOCEntry;
  p: PByte;
  titleLen: integer;
  title: string;
  lOffset: uint32;
begin
  AOut.WriteLn('');
  AOut.WriteLn('Table of Contents');
  VisCount := 0;
  GetMem(pOffsets, SizeOf(uint32) * hdr.ntoc);
  AIn.Seek(hdr.tocoffsetsstart, soBeginning);
  AIn.Read(pOffsets^, SizeOf(uint32) * hdr.ntoc); // now we have array of toc offsets

  AIn.Seek(hdr.tocstart, soBeginning);
  GetMem(pData, hdr.toclen);
  AIn.Read(pData^, hdr.toclen);
  pEntry := pData;
  for count := 0 to hdr.ntoc-1 do
  begin
//    AIn.Read(toc, SizeOf(TTOCEntryStart));
//    FillChar(olay, SizeOf(TTOCOverlay), 0);
    p := PByte(pEntry) + sizeof(TTOCEntryStart);

    olay.extended  :=  (pEntry^.flags and TOCEntryExtended ) = TOCEntryExtended;
    olay.nestlevel := (pEntry^.flags and TOCEntryLevelMask);
    olay.hidden := (pEntry^.flags and TOCEntryHidden) = TOCEntryHidden;
    olay.haschildren := (pEntry^.flags and TOCEntryHasChildren) = TOCEntryHasChildren;

    lOffset := hdr.tocstart + (pEntry-pData);
    AOut.WriteLn(Format('  TOC Entry #%d at offset %8.8x (%d bytes)', [count, lOffset, lOffset]));
    AOut.WriteLn(Format('    tocentry.length:      %2.2x (%0:d bytes)', [pEntry^.length]));
    AOut.WriteLn(Format('    tocentry.nestlevel:   %d', [olay.nestlevel]));
    AOut.WriteLn(Format('    tocentry.unknown:     %s', [iif(olay.unknown, 'set', 'clear')]));
    AOut.WriteLn(Format('    tocentry.extended:    %s', [iif(olay.extended, 'yes', 'no')]));
    AOut.WriteLn(Format('    tocentry.hidden:      %s', [iif(olay.hidden, 'yes', 'no')]));
    AOut.WriteLn(Format('    tocentry.haschildren: %s', [iif(olay.haschildren, 'yes', 'no')]));
    AOut.WriteLn(Format('    tocentry.numSlots:    %d', [pEntry^.numSlots]));
    if not olay.hidden then
      inc(VisCount);
    if olay.extended then
    begin
      pExtendedInfo := pExtendedTOCEntry( p );  // next data to follow must be Extended TOC Entry

      AOut.WriteLn('    Extended TOC Entry');
      tocextolay := TTOCExtendedOverlay(pExtendedInfo^);

      AOut.Writeln(Format('      ExtTocEntry.setPos:    %s', [iif(tocextolay.setPos, 'yes', 'no')]));
      AOut.Writeln(Format('      ExtTocEntry.setSize:   %s', [iif(tocextolay.setSize, 'yes', 'no')]));
      AOut.Writeln(Format('      ExtTocEntry.setView:   %s', [iif(tocextolay.setView, 'yes', 'no')]));
      AOut.Writeln(Format('      ExtTocEntry.setStyle:  %s', [iif(tocextolay.setStyle, 'yes', 'no')]));
      AOut.Writeln(Format('      ExtTocEntry.noSearch:  %s', [iif(tocextolay.noSearch, 'yes', 'no')]));
      AOut.Writeln(Format('      ExtTocEntry.noPrint:   %s', [iif(tocextolay.noPrint, 'yes', 'no')]));
      AOut.Writeln(Format('      ExtTocEntry.setCtrl:   %s', [iif(tocextolay.setCtrl, 'yes', 'no')]));
      AOut.Writeln(Format('      ExtTocEntry.setTutor:  %s', [iif(tocextolay.setTutor, 'yes', 'no')]));
      AOut.Writeln(Format('      ExtTocEntry.clear:     %s', [iif(tocextolay.clear, 'clear', 'set')]));
      AOut.Writeln(Format('      ExtTocEntry.unknown1:  %1.1x', [tocextolay.unknown1]));
      AOut.Writeln(Format('      ExtTocEntry.setGroup:  %s', [iif(tocextolay.setGroup, 'yes', 'no')]));
      AOut.Writeln(Format('      ExtTocEntry.isParent:  %s', [iif(tocextolay.isParent, 'yes', 'no')]));
      AOut.Writeln(Format('      ExtTocEntry.unknown2:  %1.1x', [tocextolay.unknown2]));

      inc( p, sizeof( TExtendedTOCEntry ) );    // move p past two flag bytes

      if ( pExtendedInfo^.w1 and 1 ) > 0 then
        // skip position
        inc( p, sizeof( THelpXYPair ) );

      if ( pExtendedInfo^.w1 and 2 ) > 0 then
        // skip size
        inc( p, sizeof( THelpXYPair ) );

      if ( pExtendedInfo^.w1 and 8 ) > 0 then
        // skip window controls
        inc( p, sizeof(word) );    // increment by 2

      if ( pExtendedInfo^.w1 and $40 ) > 0 then
        // skip something else, unknown... style? 2 bytes
        inc( p, sizeof(word) );    // increment by 2

      if ( pExtendedInfo^.w2 and 4 ) > 0 then
      begin
//        _ContentsGroupIndex := pUInt16(p)^;
        // read group
        inc( p, sizeof( uint16 ) );
      end;
    end;

    // skip slot numbers for now.
//    _pSlotNumbers := pUInt16(p);
    inc( p, pEntry^.numSlots * sizeof(uint16) );

  // Calculate the remainder of the tocentry length - that is the bytes used for TOC topic (title) text
  titleLen := pEntry^.length - ( longword( p ) - longword( pEntry ) );

  // Read title
  if TitleLen > 0 then
    SetString(Title, Pointer(p), TitleLen)
  else
    Title := '<unknown>';
  AOut.WriteLn(Format('    toc Title:            %s', [title]));


    p := PByte(pEntry);
    inc(p, pEntry^.Length);
    pEntry := pTTOCEntryStart(p);
  end;

  AOut.WriteLn(Format('  TOC visible count:  %d', [VisCount]));
  FreeMem(pOffsets, SizeOf(uint32) * hdr.ntoc);
  FreeMem(pData, hdr.toclen);
end;

end.