SickGear/lib/hachoir/field/byte_field.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

76 lines
2.2 KiB
Python

"""
Very basic field: raw content with a size in byte. Use this class for
unknown content.
"""
import types
from hachoir.field import Field, FieldError
from hachoir.core.tools import makePrintable
from hachoir.core.bits import str2hex
from hachoir.core import config
MAX_LENGTH = (2 ** 64)
class RawBytes(Field):
"""
Byte vector of unknown content
@see: L{Bytes}
"""
static_size = staticmethod(lambda *args, **kw: args[1] * 8)
def __init__(self, parent, name, length, description="Raw data"):
assert issubclass(parent.__class__, Field)
if not (0 < length <= MAX_LENGTH):
raise FieldError("Invalid RawBytes length (%s)!" % length)
Field.__init__(self, parent, name, length * 8, description)
self._display = None
def _createDisplay(self, human):
max_bytes = config.max_byte_length
if isinstance(self._getValue, types.FunctionType):
display = makePrintable(self.value[:max_bytes], "ASCII")
else:
if self._display is None:
address = self.absolute_address
length = min(self._size // 8, max_bytes)
self._display = self._parent.stream.readBytes(address, length)
display = makePrintable(self._display, "ASCII")
truncated = (8 * len(display) < self._size)
if human:
if truncated:
display += "(...)"
return makePrintable(display, "latin-1", quote='"', to_unicode=True)
else:
display = str2hex(display, format=r"\x%02x")
if truncated:
return '"%s(...)"' % display
else:
return '"%s"' % display
def createDisplay(self):
return self._createDisplay(True)
def createRawDisplay(self):
return self._createDisplay(False)
def hasValue(self):
return True
def createValue(self):
assert (self._size % 8) == 0
if self._display:
self._display = None
return self._parent.stream.readBytes(
self.absolute_address, self._size // 8)
class Bytes(RawBytes):
"""
Byte vector: can be used for magic number or GUID/UUID for example.
@see: L{RawBytes}
"""
pass