SickGear/lib/hachoir/field/static_field_set.py
JackDandy 980e05cc99 Change Hachoir can't support PY2 so backport their PY3 to prevent a need for system dependant external binaries like mediainfo.
Backported 400 revisions from rev 1de4961-8897c5b (2018-2014).
Move core/benchmark, core/cmd_line, core/memory, core/profiler and core/timeout to core/optional/*
Remove metadata/qt*

PORT: Version 2.0a3 (inline with 3.0a3 @ f80c7d5).
Basic Support for XMP Packets.
tga: improvements to adhere more closely to the spec.
pdf: slightly improved parsing.
rar: fix TypeError on unknown block types.
Add MacRoman win32 codepage.
tiff/exif: support SubIFDs and tiled images.
Add method to export metadata in dictionary.
mpeg_video: don't attempt to parse Stream past length.
mpeg_video: parse ESCR correctly, add SCR value.
Change centralise CustomFragments.
field: don't set parser class if class is None, to enable autodetect.
field: add value/display for CustomFragment.
parser: inline warning to enable tracebacks in debug mode.
Fix empty bytestrings in makePrintable.
Fix contentSize in jpeg.py to account for image_data blocks.
Fix the ELF parser.
Enhance the AR archive parser.
elf parser: fix wrong wrong fields order in parsing little endian section flags.
elf parser: add s390 as a machine type.
Flesh out mp4 parser.

PORT: Version 2.0a1 (inline with 3.0a1).
Major refactoring and PEP8.
Fix ResourceWarning warnings on files. Add a close() method and support for the context manager protocol ("with obj: ...") to parsers, input and output streams.
metadata: get comment from ZIP.
Support for InputIOStream.read(0).
Fix sizeGe when size is None.
Remove unused new_seekable_field_set file.
Remove parser Mapsforge .map.
Remove parser Parallel Realities Starfighter .pak files.
sevenzip: fix for newer archives.
java: update access flags and modifiers for Java 1.7 and update description text for most recent Java.
Support ustar prefix field in tar archives.
Remove file_system* parsers.
Remove misc parsers 3d0, 3ds, gnome_keyring, msoffice*, mstask, ole*, word*.
Remove program parsers macho, nds, prc.
Support non-8bit Character subclasses.
Python parser supports Python 3.7.
Enhance mpeg_ts parser to support MTS/M2TS.
Support for creation date in tiff.
Change don't hardcode errno constant.

PORT: 1.9.1
Internal Only: The following are legacy reference to upstream commit messages.
Relevant changes up to b0a115f8.
Use integer division.
Replace HACHOIR_ERRORS with Exception.
Fix metadata.Data: make it sortable.
Import fixes from e7de492.
PORT: Version 2.0a1 (inline with 3.0a1 @ e9f8fad).
Replace hachoir.core.field with hachoir.field
Replace hachoir.core.stream with hachoir.stream
Remove the compatibility module for PY1.5 to PY2.5.
metadata: support TIFF picture.
metadata: fix string normalization.
metadata: fix datetime regex Fix hachoir bug #57.
FileFromInputStream: fix comparison between None and an int.
InputIOStream: open the file in binary mode.
2018-03-28 00:43:11 +01:00

54 lines
1.8 KiB
Python

from hachoir.field import FieldSet, ParserError
class StaticFieldSet(FieldSet):
"""
Static field set: format class attribute is a tuple of all fields
in syntax like:
format = (
(TYPE1, ARG1, ARG2, ...),
(TYPE2, ARG1, ARG2, ..., {KEY1=VALUE1, ...}),
...
)
Types with dynamic size are forbidden, eg. CString, PascalString8, etc.
"""
format = None # You have to redefine this class variable
_class = None
def __new__(cls, *args, **kw):
assert cls.format is not None, "Class attribute 'format' is not set"
if cls._class is not cls.__name__:
cls._class = cls.__name__
cls.static_size = cls._computeStaticSize()
return object.__new__(cls, *args, **kw)
@staticmethod
def _computeItemSize(item):
item_class = item[0]
if item_class.static_size is None:
raise ParserError("Unable to get static size of field type: %s"
% item_class.__name__)
if callable(item_class.static_size):
if isinstance(item[-1], dict):
return item_class.static_size(*item[1:-1], **item[-1])
else:
return item_class.static_size(*item[1:])
else:
assert isinstance(item_class.static_size, (int, long))
return item_class.static_size
def createFields(self):
for item in self.format:
if isinstance(item[-1], dict):
yield item[0](self, *item[1:-1], **item[-1])
else:
yield item[0](self, *item[1:])
@classmethod
def _computeStaticSize(cls, *args):
return sum(cls._computeItemSize(item) for item in cls.format)
# Initial value of static_size, it changes when first instance
# is created (see __new__)
static_size = _computeStaticSize