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//usr/lib/python2.4/site-packages/rhsm/bitstream.pyo
mň Wx[Uc @ s' d k l Z d e f d YZ d S( ( s dequet GhettoBitStreamc B s_ t Z d Z d Z d Z d Z d Z e d Z e d Z e d Z RS( sú Accepts binary data and makes it available as a stream of bits or one byte at a time. Python does not provide a built-in way to read a stream of bits, or a way to represent a single bit. Thus, this class uses character '0' or '1' to represent the status of each bit. Data is converted into the '0' and '1' characters one byte at a time, since that operation multiplies the size of the data by a factor of 8, and it may not be desirable to inflate all of the data at once. c C s) t d | D | _ t | _ d S( sU :param data: binary data in a string :type data: str c c s x | ] } t | Vq Wd S( N( t [outmost-iterable]t xt ord( R R ( ( t2 /usr/lib/python2.4/site-packages/rhsm/bitstream.pyt <generator expression>" s N( t dequet datat selft bytest _bit_buffer( R R ( ( R t __init__ s c C s | S( N( R ( R ( ( R t __iter__% s c C sf | i pO y | i } Wn t j o t n X| i | } | i i | n | i i S( ső converts one byte at a time into a bit representation, waiting until those bits have been consumed before converting another byte :return: next bit in the stream, either '0' or '1' :rtype: string N( R R t pop_bytet bytet IndexErrort StopIterationt _byte_to_bitst bitst extendt popleft( R R R ( ( R t next( s c C s | i i S( s_ :return: next entire byte in the stream, as an int :rtype: int N( R R R ( R ( ( R R 9 s c C s8 y d i | SWn t j o | i | Sn Xd S( s´ Produces a string representation of a byte as a base-2 number. Python versions < 2.6 lack the "bin()" builtin as well as the below "format()" method of strings, so this method falls back to using a home-brew implementation. :param byte: positive int < 256 :type byte: int :return: binary representation of byte as 8-char string :rtype: str s {0:08b}N( t formatR t AttributeErrort clst _bin_backport( R R ( ( R R @ s c C so g } xY t d d d D]E } | d | } | d j o | i d | } q | i d q Wd i | S( sK In python versions < 2.6, there is no built-in way to produce a string representation of base-2 data. Thus, we have to do it manually. :param byte: positive int < 256 :type byte: int :return: binary representation of byte as 8-char string :rtype: str i i˙˙˙˙i i t 1t 0t N( t charst ranget nR t yt appendt join( R R R R ( ( R R S s c C s+ | } | i t d t | D S( sŻ combine unsigned ints read from a bit stream into one unsigned number, reading data as big-endian :param data: iterable of positive ints, each representing a byte of uint binary data that should be combined such that the right-most byte stays as-is, and then each byte to the left gets left-shifted by 8 * n bits. For example, [1, 2] would give you 258 ((1 << 8) + 2) :type data: iterable of positive ints :return: positive int, composed from input bytes combined as one int :rtype: int c c s& x | ] \ } } | | d >Vq Wd S( i N( R R R ( R R R ( ( R R z s N( R t copyt reverset sumt enumerate( R R# ( ( R t combine_bytesh s ( t __name__t __module__t __doc__R R R R t classmethodR t staticmethodR R' ( ( ( R R s N( t collectionsR t objectR ( R R ( ( R t ? s