def unpack_record(record):
"""(record:str) -> oid:str, data:str, refs:str
The inverse of pack_record().
"""
oid = record[:8]
data_length = u32(record[8:12])
data_end = 12 + data_length
data = record[12:data_end]
refs = record[data_end:]
return oid, data, refs
def _read_block(self):
size_str = self.fp.read(4)
if len(size_str) == 0:
raise IOError, "eof"
size = u32(size_str)
if size == 0:
return ''
result = self.fp.read(size)
if len(result) != size:
raise IOError, "short read"
return result
def test_check_p32_u32(self):
for x in range(3):
assert len(p32(x)) == 4
assert x == u32(p32(x))