194     def tell(self):

   194     def tell(self):

   195         return self._stream.tell()

   195         return self._stream.tell()

   196     def close(self):

   196     def close(self):

   197         return self._stream.close()

   197         return self._stream.close()

   198 

   198 

   200         d = readexactly(self._stream, 4)

   200         d = readexactly(self._stream, 4)

   201         l = struct.unpack(">l", d)[0]

   201         l = struct.unpack(">l", d)[0]

   202         if l <= 4:

   202         if l <= 4:

   203             if l:

   203             if l:

   204                 raise error.Abort(_("invalid chunk length %d") % l)

   204                 raise error.Abort(_("invalid chunk length %d") % l)

   215         """v10 does not have a manifest header chunk"""

   215         """v10 does not have a manifest header chunk"""

   216         return {}

   216         return {}

   217 

   217 

   218     def filelogheader(self):

   218     def filelogheader(self):

   219         """return the header of the filelogs chunk, v10 only has the filename"""

   219         """return the header of the filelogs chunk, v10 only has the filename"""

   221         if not l:

   221         if not l:

   222             return {}

   222             return {}

   223         fname = readexactly(self._stream, l)

   223         fname = readexactly(self._stream, l)

   224         return {'filename': fname}

   224         return {'filename': fname}

   225 

   225 

   230         else:

   230         else:

   231             deltabase = prevnode

   231             deltabase = prevnode

   232         return node, p1, p2, deltabase, cs

   232         return node, p1, p2, deltabase, cs

   233 

   233 

   234     def deltachunk(self, prevnode):

   234     def deltachunk(self, prevnode):

   236         if not l:

   236         if not l:

   237             return {}

   237             return {}

   238         headerdata = readexactly(self._stream, self.deltaheadersize)

   238         headerdata = readexactly(self._stream, self.deltaheadersize)

   239         header = struct.unpack(self.deltaheader, headerdata)

   239         header = struct.unpack(self.deltaheader, headerdata)

   240         delta = readexactly(self._stream, l - self.deltaheadersize)

   240         delta = readexactly(self._stream, l - self.deltaheadersize)