mirror of
https://github.com/SickGear/SickGear.git
synced 2024-12-21 10:13:39 +00:00
110 lines
3.1 KiB
Python
110 lines
3.1 KiB
Python
from hachoir.field import Field, FieldSet, ParserError, Bytes, MissingField
|
|
from hachoir.stream import FragmentedStream
|
|
|
|
|
|
class Link(Field):
|
|
|
|
def __init__(self, parent, name, *args, **kw):
|
|
Field.__init__(self, parent, name, 0, *args, **kw)
|
|
|
|
def hasValue(self):
|
|
return True
|
|
|
|
def createValue(self):
|
|
return self._parent[self.display]
|
|
|
|
def createDisplay(self):
|
|
value = self.value
|
|
if value is None:
|
|
return "<%s>" % MissingField.__name__
|
|
return value.path
|
|
|
|
def _getField(self, name, const):
|
|
target = self.value
|
|
assert self != target
|
|
return target._getField(name, const)
|
|
|
|
|
|
class Fragments:
|
|
|
|
def __init__(self, first):
|
|
self.first = first
|
|
|
|
def __iter__(self):
|
|
fragment = self.first
|
|
while fragment is not None:
|
|
data = fragment.getData()
|
|
yield data and data.size
|
|
fragment = fragment.next
|
|
|
|
|
|
class Fragment(FieldSet):
|
|
_first = None
|
|
|
|
def __init__(self, *args, **kw):
|
|
FieldSet.__init__(self, *args, **kw)
|
|
self._field_generator = self._createFields(self._field_generator)
|
|
if self.__class__.createFields == Fragment.createFields:
|
|
self._getData = lambda: self
|
|
|
|
def getData(self):
|
|
try:
|
|
return self._getData()
|
|
except MissingField as e:
|
|
self.error(str(e))
|
|
return None
|
|
|
|
def setLinks(self, first, next=None):
|
|
self._first = first or self
|
|
self._next = next
|
|
self._feedLinks = lambda: self
|
|
return self
|
|
|
|
def _feedLinks(self):
|
|
while self._first is None and self.readMoreFields(1):
|
|
pass
|
|
if self._first is None:
|
|
raise ParserError("first is None")
|
|
return self
|
|
first = property(lambda self: self._feedLinks()._first)
|
|
|
|
def _getNext(self):
|
|
next = self._feedLinks()._next
|
|
if callable(next):
|
|
self._next = next = next()
|
|
return next
|
|
next = property(_getNext)
|
|
|
|
def _createInputStream(self, **args):
|
|
first = self.first
|
|
if first is self and hasattr(first, "_getData"):
|
|
return FragmentedStream(first, packets=Fragments(first), **args)
|
|
return FieldSet._createInputStream(self, **args)
|
|
|
|
def _createFields(self, field_generator):
|
|
if self._first is None:
|
|
for field in field_generator:
|
|
if self._first is not None:
|
|
break
|
|
yield field
|
|
else:
|
|
raise ParserError("Fragment.setLinks not called")
|
|
else:
|
|
field = None
|
|
if self._first is not self:
|
|
link = Link(self, "first", None)
|
|
link._getValue = lambda: self._first
|
|
yield link
|
|
if self._next:
|
|
link = Link(self, "next", None)
|
|
link.createValue = self._getNext
|
|
yield link
|
|
if field:
|
|
yield field
|
|
for field in field_generator:
|
|
yield field
|
|
|
|
def createFields(self):
|
|
if self._size is None:
|
|
self._size = self._getSize()
|
|
yield Bytes(self, "data", self._size // 8)
|