def create(cls, object_iter, base_dir, object_count = None, zlib_compression = zlib.Z_BEST_SPEED):
"""Create a new on-disk entity comprised of a properly named pack file and a properly named
and corresponding index file. The pack contains all OStream objects contained in object iter.
:param base_dir: directory which is to contain the files
:return: PackEntity instance initialized with the new pack
:note: for more information on the other parameters see the write_pack method"""
pack_fd, pack_path = tempfile.mkstemp('', 'pack', base_dir)
index_fd, index_path = tempfile.mkstemp('', 'index', base_dir)
pack_write = lambda d: os.write(pack_fd, d)
index_write = lambda d: os.write(index_fd, d)
pack_binsha, index_binsha = cls.write_pack(object_iter, pack_write, index_write, object_count, zlib_compression)
os.close(pack_fd)
os.close(index_fd)
fmt = "pack-%s.%s"
new_pack_path = os.path.join(base_dir, fmt % (bin_to_hex(pack_binsha), 'pack'))
new_index_path = os.path.join(base_dir, fmt % (bin_to_hex(pack_binsha), 'idx'))
os.rename(pack_path, new_pack_path)
os.rename(index_path, new_index_path)
return cls(new_pack_path)
def hexsha(self): """:return: our sha, hex encoded, 40 bytes""" return bin_to_hex(self[0])
def hexsha(self): return bin_to_hex(self[0])
def hexsha(self):
return bin_to_hex(self[0])
def hexsha(self):
""":return: our sha, hex encoded, 40 bytes"""
return bin_to_hex(self[0])
def mul(a, b):
a = util.hex_to_dec(a)
b = util.hex_to_dec(b)
c = util.bin_to_hex(str(GF256(a) * GF256(b))[8:16])
return c
