mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-30 00:13:38 +00:00
360 lines
14 KiB
Python
360 lines
14 KiB
Python
"""
|
|
InfoTech Storage Format (ITSF) parser, used by Microsoft's HTML Help (.chm)
|
|
|
|
Document:
|
|
- Microsoft's HTML Help (.chm) format
|
|
http://www.wotsit.org (search "chm")
|
|
- chmlib library
|
|
http://www.jedrea.com/chmlib/
|
|
- Unofficial CHM Spec
|
|
http://savannah.nongnu.org/projects/chmspec
|
|
- Microsoft's HTML Help (.chm) format
|
|
http://www.speakeasy.org/~russotto/chm/chmformat.html
|
|
|
|
Author: Victor Stinner
|
|
Creation date: 2007-03-04
|
|
"""
|
|
|
|
from hachoir.field import (Field, FieldSet, ParserError, RootSeekableFieldSet,
|
|
Int32, UInt16, UInt32, UInt64,
|
|
RawBytes, PaddingBytes,
|
|
Enum, String)
|
|
from hachoir.core.endian import LITTLE_ENDIAN
|
|
from hachoir.parser import HachoirParser
|
|
from hachoir.parser.common.win32 import GUID
|
|
from hachoir.parser.common.win32_lang_id import LANGUAGE_ID
|
|
from hachoir.core.text_handler import textHandler, hexadecimal, filesizeHandler
|
|
|
|
|
|
class CWord(Field):
|
|
"""
|
|
Compressed double-word
|
|
"""
|
|
|
|
def __init__(self, parent, name, description=None):
|
|
Field.__init__(self, parent, name, 8, description)
|
|
|
|
endian = self._parent.endian
|
|
stream = self._parent.stream
|
|
addr = self.absolute_address
|
|
|
|
value = 0
|
|
byte = stream.readBits(addr, 8, endian)
|
|
while byte & 0x80:
|
|
value <<= 7
|
|
value += (byte & 0x7f)
|
|
self._size += 8
|
|
if 64 < self._size:
|
|
raise ParserError("CHM: CWord is limited to 64 bits")
|
|
addr += 8
|
|
byte = stream.readBits(addr, 8, endian)
|
|
value <<= 7
|
|
value += byte
|
|
self.createValue = lambda: value
|
|
|
|
|
|
class Filesize_Header(FieldSet):
|
|
|
|
def createFields(self):
|
|
yield textHandler(UInt32(self, "unknown[]", "0x01FE"), hexadecimal)
|
|
yield textHandler(UInt32(self, "unknown[]", "0x0"), hexadecimal)
|
|
yield filesizeHandler(UInt64(self, "file_size"))
|
|
yield textHandler(UInt32(self, "unknown[]", "0x0"), hexadecimal)
|
|
yield textHandler(UInt32(self, "unknown[]", "0x0"), hexadecimal)
|
|
|
|
|
|
class ITSP(FieldSet):
|
|
|
|
def __init__(self, *args):
|
|
FieldSet.__init__(self, *args)
|
|
self._size = self["size"].value * 8
|
|
|
|
def createFields(self):
|
|
yield String(self, "magic", 4, "ITSP", charset="ASCII")
|
|
yield UInt32(self, "version", "Version (=1)")
|
|
yield filesizeHandler(UInt32(self, "size", "Length (in bytes) of the directory header (84)"))
|
|
yield UInt32(self, "unknown[]", "(=10)")
|
|
yield filesizeHandler(UInt32(self, "block_size", "Directory block size"))
|
|
yield UInt32(self, "density", "Density of quickref section, usually 2")
|
|
yield UInt32(self, "index_depth", "Depth of the index tree")
|
|
yield Int32(self, "nb_dir", "Chunk number of root index chunk")
|
|
yield UInt32(self, "first_pmgl", "Chunk number of first PMGL (listing) chunk")
|
|
yield UInt32(self, "last_pmgl", "Chunk number of last PMGL (listing) chunk")
|
|
yield Int32(self, "unknown[]", "-1")
|
|
yield UInt32(self, "nb_dir_chunk", "Number of directory chunks (total)")
|
|
yield Enum(UInt32(self, "lang_id", "Windows language ID"), LANGUAGE_ID)
|
|
yield GUID(self, "system_uuid", "{5D02926A-212E-11D0-9DF9-00A0C922E6EC}")
|
|
yield filesizeHandler(UInt32(self, "size2", "Same value than size"))
|
|
yield Int32(self, "unknown[]", "-1")
|
|
yield Int32(self, "unknown[]", "-1")
|
|
yield Int32(self, "unknown[]", "-1")
|
|
|
|
|
|
class ITSF(FieldSet):
|
|
|
|
def createFields(self):
|
|
yield String(self, "magic", 4, "ITSF", charset="ASCII")
|
|
yield UInt32(self, "version")
|
|
yield UInt32(self, "header_size", "Total header length (in bytes)")
|
|
yield UInt32(self, "one")
|
|
yield UInt32(self, "last_modified", "Lower 32 bits of the time expressed in units of 0.1 us")
|
|
yield Enum(UInt32(self, "lang_id", "Windows Language ID"), LANGUAGE_ID)
|
|
yield GUID(self, "dir_uuid", "{7C01FD10-7BAA-11D0-9E0C-00A0-C922-E6EC}")
|
|
yield GUID(self, "stream_uuid", "{7C01FD11-7BAA-11D0-9E0C-00A0-C922-E6EC}")
|
|
yield UInt64(self, "filesize_offset")
|
|
yield filesizeHandler(UInt64(self, "filesize_len"))
|
|
yield UInt64(self, "dir_offset")
|
|
yield filesizeHandler(UInt64(self, "dir_len"))
|
|
if 3 <= self["version"].value:
|
|
yield UInt64(self, "data_offset")
|
|
|
|
|
|
class PMGL_Entry(FieldSet):
|
|
|
|
def createFields(self):
|
|
yield CWord(self, "name_len")
|
|
yield String(self, "name", self["name_len"].value, charset="UTF-8")
|
|
yield CWord(self, "section", "Section number that the entry data is in.")
|
|
yield CWord(self, "start", "Start offset of the data")
|
|
yield filesizeHandler(CWord(self, "length", "Length of the data"))
|
|
|
|
def createDescription(self):
|
|
return "%s (%s)" % (self["name"].value, self["length"].display)
|
|
|
|
|
|
class PMGL(FieldSet):
|
|
|
|
def createFields(self):
|
|
# Header
|
|
yield String(self, "magic", 4, "PMGL", charset="ASCII")
|
|
yield filesizeHandler(Int32(self, "free_space",
|
|
"Length of free space and/or quickref area at end of directory chunk"))
|
|
yield Int32(self, "unknown")
|
|
yield Int32(self, "previous", "Chunk number of previous listing chunk")
|
|
yield Int32(self, "next", "Chunk number of previous listing chunk")
|
|
|
|
# Entries
|
|
stop = self.size - self["free_space"].value * 8
|
|
entry_count = 0
|
|
while self.current_size < stop:
|
|
yield PMGL_Entry(self, "entry[]")
|
|
entry_count += 1
|
|
|
|
# Padding
|
|
quickref_frequency = 1 + (1 << self["/dir/itsp/density"].value)
|
|
num_quickref = (entry_count // quickref_frequency)
|
|
if entry_count % quickref_frequency == 0:
|
|
num_quickref -= 1
|
|
print(self.current_size // 8, quickref_frequency, num_quickref)
|
|
padding = (self["free_space"].value - (num_quickref * 2 + 2))
|
|
if padding:
|
|
yield PaddingBytes(self, "padding", padding)
|
|
for i in range(num_quickref * quickref_frequency, 0, -quickref_frequency):
|
|
yield UInt16(self, "quickref[%i]" % i)
|
|
yield UInt16(self, "entry_count")
|
|
|
|
|
|
class PMGI_Entry(FieldSet):
|
|
|
|
def createFields(self):
|
|
yield CWord(self, "name_len")
|
|
yield String(self, "name", self["name_len"].value, charset="UTF-8")
|
|
yield CWord(self, "page")
|
|
|
|
def createDescription(self):
|
|
return "%s (page #%u)" % (self["name"].value, self["page"].value)
|
|
|
|
|
|
class PMGI(FieldSet):
|
|
|
|
def createFields(self):
|
|
yield String(self, "magic", 4, "PMGI", charset="ASCII")
|
|
yield filesizeHandler(UInt32(self, "free_space",
|
|
"Length of free space and/or quickref area at end of directory chunk"))
|
|
|
|
stop = self.size - self["free_space"].value * 8
|
|
while self.current_size < stop:
|
|
yield PMGI_Entry(self, "entry[]")
|
|
|
|
padding = (self.size - self.current_size) // 8
|
|
if padding:
|
|
yield PaddingBytes(self, "padding", padding)
|
|
|
|
|
|
class Directory(FieldSet):
|
|
|
|
def createFields(self):
|
|
yield ITSP(self, "itsp")
|
|
block_size = self["itsp/block_size"].value * 8
|
|
|
|
nb_dir = self["itsp/nb_dir"].value
|
|
|
|
if nb_dir < 0:
|
|
nb_dir = 1
|
|
for index in range(nb_dir):
|
|
yield PMGL(self, "pmgl[]", size=block_size)
|
|
|
|
if self.current_size < self.size:
|
|
yield PMGI(self, "pmgi", size=block_size)
|
|
|
|
|
|
class NameList(FieldSet):
|
|
|
|
def createFields(self):
|
|
yield UInt16(self, "length", "Length of name list in 2-byte blocks")
|
|
yield UInt16(self, "count", "Number of entries in name list")
|
|
for index in range(self["count"].value):
|
|
length = UInt16(
|
|
self, "name_len[]", "Length of name in 2-byte blocks, excluding terminating null")
|
|
yield length
|
|
yield String(self, "name[]", length.value * 2 + 2, charset="UTF-16-LE")
|
|
|
|
|
|
class ControlData(FieldSet):
|
|
|
|
def createFields(self):
|
|
yield UInt32(self, "count", "Number of DWORDS in this struct")
|
|
yield String(self, "type", 4, "Type of compression")
|
|
if self["type"].value != 'LZXC':
|
|
return
|
|
yield UInt32(self, "version", "Compression version")
|
|
version = self["version"].value
|
|
if version == 1:
|
|
block = 'bytes'
|
|
else:
|
|
block = '32KB blocks'
|
|
yield UInt32(self, "reset_interval", "LZX: Reset interval in %s" % block)
|
|
yield UInt32(self, "window_size", "LZX: Window size in %s" % block)
|
|
yield UInt32(self, "cache_size", "LZX: Cache size in %s" % block)
|
|
yield UInt32(self, "unknown[]")
|
|
|
|
|
|
class ResetTable(FieldSet):
|
|
|
|
def createFields(self):
|
|
yield UInt32(self, "unknown[]", "Version number?")
|
|
yield UInt32(self, "count", "Number of entries")
|
|
yield UInt32(self, "entry_size", "Size of each entry")
|
|
yield UInt32(self, "header_size", "Size of this header")
|
|
yield UInt64(self, "uncompressed_size")
|
|
yield UInt64(self, "compressed_size")
|
|
yield UInt64(self, "block_size", "Block size in bytes")
|
|
for i in range(self["count"].value):
|
|
yield UInt64(self, "block_location[]", "location in compressed data of 1st block boundary in uncompressed data")
|
|
|
|
|
|
class SystemEntry(FieldSet):
|
|
ENTRY_TYPE = {0: "HHP: [OPTIONS]: Contents File",
|
|
1: "HHP: [OPTIONS]: Index File",
|
|
2: "HHP: [OPTIONS]: Default Topic",
|
|
3: "HHP: [OPTIONS]: Title",
|
|
4: "File Metadata",
|
|
5: "HHP: [OPTIONS]: Default Window",
|
|
6: "HHP: [OPTIONS]: Compiled file",
|
|
# 7 present only in files with Binary Index; unknown function
|
|
# 8 unknown function
|
|
9: "Version",
|
|
10: "Timestamp",
|
|
# 11 only in Binary TOC files
|
|
12: "Number of Info Types",
|
|
13: "#IDXHDR file",
|
|
# 14 unknown function
|
|
# 15 checksum??
|
|
16: "HHP: [OPTIONS]: Default Font",
|
|
}
|
|
|
|
def createFields(self):
|
|
yield Enum(UInt16(self, "type", "Type of entry"), self.ENTRY_TYPE)
|
|
yield UInt16(self, "length", "Length of entry")
|
|
yield RawBytes(self, "data", self["length"].value)
|
|
|
|
def createDescription(self):
|
|
return '#SYSTEM Entry, Type %s' % self["type"].display
|
|
|
|
|
|
class SystemFile(FieldSet):
|
|
|
|
def createFields(self):
|
|
yield UInt32(self, "version", "Either 2 or 3")
|
|
while self.current_size < self.size:
|
|
yield SystemEntry(self, "entry[]")
|
|
|
|
|
|
class ChmFile(HachoirParser, RootSeekableFieldSet):
|
|
MAGIC = b"ITSF\3\0\0\0"
|
|
PARSER_TAGS = {
|
|
"id": "chm",
|
|
"category": "misc",
|
|
"file_ext": ("chm",),
|
|
"min_size": 4 * 8,
|
|
"magic": ((MAGIC, 0),),
|
|
"description": "Microsoft's HTML Help (.chm)",
|
|
}
|
|
endian = LITTLE_ENDIAN
|
|
|
|
def __init__(self, stream, **args):
|
|
RootSeekableFieldSet.__init__(
|
|
self, None, "root", stream, None, stream.askSize(self))
|
|
HachoirParser.__init__(self, stream, **args)
|
|
|
|
def validate(self):
|
|
if self.stream.readBytes(0, len(self.MAGIC)) != self.MAGIC:
|
|
return "Invalid magic"
|
|
return True
|
|
|
|
def createFields(self):
|
|
yield ITSF(self, "itsf")
|
|
yield Filesize_Header(self, "file_size", size=self["itsf/filesize_len"].value * 8)
|
|
|
|
self.seekByte(self["itsf/dir_offset"].value)
|
|
directory = Directory(self, "dir", size=self["itsf/dir_len"].value * 8)
|
|
yield directory
|
|
|
|
otherentries = {}
|
|
for pmgl in directory.array("pmgl"):
|
|
for entry in pmgl.array("entry"):
|
|
if entry["section"].value != 0:
|
|
otherentries.setdefault(
|
|
entry["section"].value, []).append(entry)
|
|
continue
|
|
if entry["length"].value == 0:
|
|
continue
|
|
self.seekByte(
|
|
self["itsf/data_offset"].value + entry["start"].value)
|
|
name = entry["name"].value
|
|
if name == "::DataSpace/NameList":
|
|
yield NameList(self, "name_list")
|
|
elif name.startswith('::DataSpace/Storage/'):
|
|
sectname = str(name.split('/')[2])
|
|
if name.endswith('/SpanInfo'):
|
|
yield UInt64(self, "%s_spaninfo" % sectname, "Size of uncompressed data in the %s section" % sectname)
|
|
elif name.endswith('/ControlData'):
|
|
yield ControlData(self, "%s_controldata" % sectname, "Data about the compression scheme", size=entry["length"].value * 8)
|
|
elif name.endswith('/Transform/List'):
|
|
yield String(self, "%s_transform_list" % sectname, 38, description="Transform/List element", charset="UTF-16-LE")
|
|
elif name.endswith('/Transform/{7FC28940-9D31-11D0-9B27-00A0C91E9C7C}/InstanceData/ResetTable'):
|
|
yield ResetTable(self, "%s_reset_table" % sectname, "LZX Reset Table", size=entry["length"].value * 8)
|
|
elif name.endswith('/Content'):
|
|
# eventually, a LZX wrapper will appear here, we hope!
|
|
yield RawBytes(self, "%s_content" % sectname, entry["length"].value, "Content for the %s section" % sectname)
|
|
else:
|
|
yield RawBytes(self, "entry_data[]", entry["length"].value, name)
|
|
elif name == "/#SYSTEM":
|
|
yield SystemFile(self, "system_file", size=entry["length"].value * 8)
|
|
else:
|
|
yield RawBytes(self, "entry_data[]", entry["length"].value, name)
|
|
|
|
def getFile(self, filename):
|
|
page = 0
|
|
if 'pmgi' in self['/dir']:
|
|
for entry in self['/dir/pmgi'].array('entry'):
|
|
if entry['name'].value <= filename:
|
|
page = entry['page'].value
|
|
pmgl = self['/dir/pmgl[%i]' % page]
|
|
for entry in pmgl.array('entry'):
|
|
if entry['name'].value == filename:
|
|
return entry
|
|
raise ParserError("File '%s' not found!" % filename)
|
|
|
|
def createContentSize(self):
|
|
return self["file_size/file_size"].value * 8
|