def printout(self, stream, context):
obj = Container()
if self.show_stream:
obj.stream_position = stream.tell()
follows = stream.read(self.stream_lookahead)
if not follows:
obj.following_stream_data = "EOF reached"
else:
stream.seek(-len(follows), 1)
obj.following_stream_data = HexString(follows)
print
if self.show_context:
obj.context = context
if self.show_stack:
obj.stack = ListContainer()
frames = [s[0] for s in inspect.stack()][1:-1]
frames.reverse()
for f in frames:
a = Container()
a.__update__(f.f_locals)
obj.stack.append(a)
print "=" * 80
print "Probe", self.printname
print obj
print "=" * 80
def _parse(self, stream, context):
if "<obj>" in context:
obj = context["<obj>"]
del context["<obj>"]
else:
obj = Container()
if self.nested:
context = Container(_=context)
for sc in self.subcons:
if sc.conflags & self.FLAG_EMBED:
context["<obj>"] = obj
sc._parse(stream, context)
else:
subobj = sc._parse(stream, context)
if sc.name is not None:
obj[sc.name] = subobj
context[sc.name] = subobj
return obj
def parse_stream(self, stream):
"""
Parse a stream.
Files, pipes, sockets, and other streaming sources of data are handled
by this method.
"""
return self._parse(stream, Container())
def _build(self, obj, stream, context):
if "<unnested>" in context:
del context["<unnested>"]
elif self.nested:
context = Container(_=context)
for sc in self.subcons:
if sc.conflags & self.FLAG_EMBED:
context["<unnested>"] = True
subobj = obj
elif sc.name is None:
subobj = None
else:
subobj = getattr(obj, sc.name)
context[sc.name] = subobj
sc._build(subobj, stream, context)
def sizeof(self, context=None):
"""
Calculate the size of this object, optionally using a context.
Some constructs have no fixed size and can only know their size for a
given hunk of data; these constructs will raise an error if they are
not passed a context.
:param ``Container`` context: contextual data
:returns: int of the length of this construct
:raises SizeofError: the size could not be determined
"""
if context is None:
context = Container()
try:
return self._sizeof(context)
except Exception, e:
raise SizeofError(e)
def set_pairs(self, keywords):
for operon in self:
pairs = Container()
operon.pairs = pairs
for k in keywords:
setattr(operon.pairs, k, {})
def _sizeof(self, context):
if self.nested:
context = Container(_=context)
return sum(sc._sizeof(context) for sc in self.subcons)
def build_stream(self, obj, stream):
"""
Build an object directly into a stream.
"""
self._build(obj, stream, Container())