mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-25 22:35:05 +00:00
73 lines
2 KiB
Python
73 lines
2 KiB
Python
|
"""
|
||
|
|
Very basic field: raw content with a size in byte. Use this class for
|
||
|
|
unknown content.
|
||
|
|
"""
|
||
|
|
|
||
|
|
from hachoir.field import Field, FieldError
|
||
|
|
from hachoir.core.tools import makePrintable
|
||
|
|
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
|
||
|
|
try:
|
||
|
|
display = makePrintable(self.value[:max_bytes], "ASCII")
|
||
|
|
except Exception:
|
||
|
|
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='"')
|
||
|
|
else:
|
||
|
|
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
|