Returns the current unpack position in the data buffer.
set_position(
position)
Sets the data buffer unpack position to position. You should be
careful about using get_position() and set_position().
get_buffer(
)
Returns the current unpack data buffer as a string.
done(
)
Indicates unpack completion. Raises an Error exception
if all of the data has not been unpacked.
In addition, every data type that can be packed with a Packer,
can be unpacked with an Unpacker. Unpacking methods are of the
form unpack_type(), and take no arguments. They return the
unpacked object.
unpack_float(
)
Unpacks a single-precision floating point number.
unpack_double(
)
Unpacks a double-precision floating point number, similarly to
unpack_float().
In addition, the following methods unpack strings, bytes, and opaque
data:
unpack_fstring(
n)
Unpacks and returns a fixed length string. n is the number of
characters expected. Padding with null bytes to guaranteed 4 byte
alignment is assumed.
unpack_fopaque(
n)
Unpacks and returns a fixed length opaque data stream, similarly to
unpack_fstring().
unpack_string(
)
Unpacks and returns a variable length string. The length of the
string is first unpacked as an unsigned integer, then the string data
is unpacked with unpack_fstring().
unpack_opaque(
)
Unpacks and returns a variable length opaque data string, similarly to
unpack_string().
unpack_bytes(
)
Unpacks and returns a variable length byte stream, similarly to
unpack_string().
The following methods support unpacking arrays and lists:
unpack_list(
unpack_item)
Unpacks and returns a list of homogeneous items. The list is unpacked
one element at a time
by first unpacking an unsigned integer flag. If the flag is 1,
then the item is unpacked and appended to the list. A flag of
0 indicates the end of the list. unpack_item is the
function that is called to unpack the items.
unpack_farray(
n, unpack_item)
Unpacks and returns (as a list) a fixed length array of homogeneous
items. n is number of list elements to expect in the buffer.
As above, unpack_item is the function used to unpack each element.
unpack_array(
unpack_item)
Unpacks and returns a variable length list of homogeneous items.
First, the length of the list is unpacked as an unsigned integer, then
each element is unpacked as in unpack_farray() above.
