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{
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.
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