def get_object_at(self, offset):
if offset in self._offset_cache:
return self._offset_cache[offset]
assert offset >= self._header_size
pack_reader = SwiftPackReader(self.scon, self._filename,
self.pack_length)
pack_reader.seek(offset)
unpacked, _ = unpack_object(pack_reader.read)
return (unpacked.pack_type_num, unpacked._obj())
def get_object_at(self, offset):
if offset in self._offset_cache:
return self._offset_cache[offset]
assert offset >= self._header_size
pack_reader = SwiftPackReader(self.scon, self._filename,
self.pack_length)
pack_reader.seek(offset)
unpacked, _ = unpack_object(pack_reader.read)
return (unpacked.pack_type_num, unpacked._obj())
def test_write_pack_object(self):
f = BytesIO()
f.write('header')
offset = f.tell()
crc32 = write_pack_object(f, Blob.type_num, 'blob')
self.assertEqual(crc32, zlib.crc32(f.getvalue()[6:]) & 0xffffffff)
f.write('x') # unpack_object needs extra trailing data.
f.seek(offset)
unpacked, unused = unpack_object(f.read, compute_crc32=True)
self.assertEqual(Blob.type_num, unpacked.pack_type_num)
self.assertEqual(Blob.type_num, unpacked.obj_type_num)
self.assertEqual(['blob'], unpacked.decomp_chunks)
self.assertEqual(crc32, unpacked.crc32)
self.assertEqual('x', unused)
