Class: Cabriolet::Binary::HLPStructures::WinHelpBTreeHeader
- Inherits:
-
BinData::Record
- Object
- BinData::Record
- Cabriolet::Binary::HLPStructures::WinHelpBTreeHeader
- Defined in:
- lib/cabriolet/binary/hlp_structures.rb
Overview
WinHelp B+ tree header (from FILEHEADER of directory)
Structure from helpdeco:
-
2 bytes: Magic (0x293B)
-
2 bytes: Flags (bit 0x0002 always 1, bit 0x0400 1 if directory)
-
2 bytes: PageSize (0x0400=1k if directory, 0x0800=2k else)
-
16 bytes: Structure (string describing structure of data)
-
2 bytes: MustBeZero (0)
-
2 bytes: PageSplits (number of page splits Btree has suffered)
-
2 bytes: RootPage (page number of Btree root page)
-
2 bytes: MustBeNegOne (0xFFFF)
-
2 bytes: TotalPages (number of Btree pages)
-
2 bytes: NLevels (number of levels of Btree)
-
4 bytes: TotalBtreeEntries (number of entries in Btree)
Total: 38 bytes (not 30!)