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Unit HelpFileHeader;
{$mode objfpc}{$H+}
// NewView - a new OS/2 Help Viewer
// Copyright 2001 Aaron Lawrence (aaronl at consultant dot com)
// This software is released under the Gnu Public License - see readme.txt
Interface
// Definition of IPF file header and other structures
uses
DataTypes;
Type
THelpFileHeader = record
ID: int16; // ID magic word (5348h = "HS")
unknown1: int8; // unknown purpose, could be third letter of ID
flags: int8; // probably a flag word...
// bit 0: set if INF style file
// bit 4: set if HLP style file
// patching this byte allows reading HLP files
// using the VIEW command, while help files
// seem to work with INF settings here as well.
hdrsize: int16; // total size of header
unknown2: int16; // unknown purpose
ntoc: int16; // number of entries in the tocarray
tocstart: int32; // file offset of the start of the toc
toclen: int32; // number of bytes in file occupied by the toc
tocoffsetsstart: int32; // file offset of the start of array of toc offsets
nres: int16; // number of panels with ressource numbers
resstart: int32; // 32 bit file offset of ressource number table
nname: int16; // number of panels with textual name
namestart: int32; // 32 bit file offset to panel name table
nindex: int16; // number of index entries
indexstart: int32; // 32 bit file offset to index table
indexlen: int32; // size of index table
unknown3: array[ 0..9 ] of int8; // unknown purpose
searchstart: int32; // 32 bit file offset of full text search table
searchlen: int32; // size of full text search table
nslots: int16; // number of "slots"
slotsstart: int32; // file offset of the slots array
dictlen: int32; // number of bytes occupied by the "dictionary"
ndict: int16; // number of entries in the dictionary
dictstart: int32; // file offset of the start of the dictionary
imgstart: int32; // file offset of image data
unknown4: int8; // unknown purpose
nlsstart: int32; // 32 bit file offset of NLS table
nlslen: int32; // size of NLS table
extstart: int32; // 32 bit file offset of extended data block
reserved: array[ 0..2 ] of int32; // for future use. set to zero.
title: array[ 0..47 ] of char; // ASCII title of database
end;
Type
TTOCEntryStart = record
length: int8; // length of the entry including this byte
flags: int8; // flag byte, description folows (MSB first)
// bit1 haschildren; // following nodes are a higher level
// bit1 hidden; // this entry doesn't appear in VIEW.EXE's
// presentation of the toc
// bit1 extended; // extended entry format
// bit1 stuff; // ??
// int4 level; // nesting level
numSlots: int8; // number of "slots" occupied by the text for
// this toc entry
end;
pTTOCEntryStart = ^TTOCEntryStart;
TExtendedTOCEntry = record
w1: int8;
w2: int8;
end;
pExtendedTOCEntry = ^TExtendedTOCEntry;
TTOCEntryOffsetArray = array[ 0..0 ] of int32;
pTTOCEntryOffsetArray = ^ TTOCEntryOffsetArray;
Const
TOCEntryExtended = 32;
TOCEntryHidden = 64;
TOCEntryHasChildren = 128;
type
THelpXYPair = record
Flags: int8;
X: int16;
Y: int16;
end;
pHelpXYPair = ^ THelpXYPair;
TSlotHeader = record
stuff: int8; // always 0??
localdictpos: int32; // file offset of the local dictionary
nlocaldict: int8; // number of entries in the local dict
ntext: int16; // number of bytes in the text
end;
pSlotHeader = ^TSlotHeader;
Implementation
Initialization
End.
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