Package org.apache.tika.parser.microsoft.chm

package org.apache.tika.parser.microsoft.chm
  • Class
    Description
    ChmAccessor<T>
    Defines an accessor interface
    ChmAssert
    Contains chm extractor assertions
    ChmBlockInfo
    A container that contains chm block information such as: i. initial block is using to reset main tree ii. start block is using for knowing where to start iii. end block is using for knowing where to stop iv. start offset is using for knowing where to start reading v. end offset is using for knowing where to stop reading
    ChmCommons
     
    ChmCommons.EntryType
    Represents entry types: uncompressed, compressed
    ChmCommons.IntelState
    Represents intel file states during decompression
    ChmCommons.LzxState
    Represents lzx states: started decoding, not started decoding
    ChmConstants
     
    ChmDirectoryListingSet
    Holds chm listing entries
    ChmExtractor
    Extracts text from chm file.
    ChmItsfHeader
    The Header 0000: char[4] 'ITSF' 0004: DWORD 3 (Version number) 0008: DWORD Total header length, including header section table and following data. 000C: DWORD 1 (unknown) 0010: DWORD a timestamp 0014: DWORD Windows Language ID 0018: GUID {7C01FD10-7BAA-11D0-9E0C-00A0-C922-E6EC} 0028: GUID {7C01FD11-7BAA-11D0-9E0C-00A0-C922-E6EC} Note: a GUID is $10 bytes, arranged as 1 DWORD, 2 WORDs, and 8 BYTEs. 0000: QWORD Offset of section from beginning of file 0008: QWORD Length of section Following the header section table is 8 bytes of additional header data.
    ChmItspHeader
    Directory header The directory starts with a header; its format is as follows: 0000: char[4] 'ITSP' 0004: DWORD Version number 1 0008: DWORD Length of the directory header 000C: DWORD $0a (unknown) 0010: DWORD $1000 Directory chunk size 0014: DWORD "Density" of quickref section, usually 2 0018: DWORD Depth of the index tree - 1 there is no index, 2 if there is one level of PMGI chunks 001C: DWORD Chunk number of root index chunk, -1 if there is none (though at least one file has 0 despite there being no index chunk, probably a bug) 0020: DWORD Chunk number of first PMGL (listing) chunk 0024: DWORD Chunk number of last PMGL (listing) chunk 0028: DWORD -1 (unknown) 002C: DWORD Number of directory chunks (total) 0030: DWORD Windows language ID 0034: GUID {5D02926A-212E-11D0-9DF9-00A0C922E6EC} 0044: DWORD $54 (This is the length again) 0048: DWORD -1 (unknown) 004C: DWORD -1 (unknown) 0050: DWORD -1 (unknown)
    ChmLzxBlock
    Decompresses a chm block.
    ChmLzxcControlData
    ::DataSpace/Storage//ControlData This file contains $20 bytes of information on the compression.
    ChmLzxcResetTable
    LZXC reset table For ensuring a decompression.
    ChmLzxState
     
    ChmParser
     
    ChmParsingException
     
    ChmPmgiHeader
    Description Note: not always exists An index chunk has the following format: 0000: char[4] 'PMGI' 0004: DWORD Length of quickref/free area at end of directory chunk 0008: Directory index entries (to quickref/free area) The quickref area in an PMGI is the same as in an PMGL The format of a directory index entry is as follows: BYTE: length of name BYTEs: name (UTF-8 encoded) ENCINT: directory listing chunk which starts with name Encoded Integers aka ENCINT An ENCINT is a variable-length integer.
    ChmPmglHeader
    Description There are two types of directory chunks -- index chunks, and listing chunks.
    ChmSection
     
    ChmWrapper
     
    DirectoryListingEntry
    The format of a directory listing entry is as follows: BYTE: length of name BYTEs: name (UTF-8 encoded) ENCINT: content section ENCINT: offset ENCINT: length The offset is from the beginning of the content section the file is in, after the section has been decompressed (if appropriate).