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