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� �aUc @ s� d Z d d l Z d d l m Z m Z d � Z e � Z d � Z d � Z d � Z d d � Z d d � Z d d � Z d � Z d � Z d � Z d S( s) Shared logic for various address types. i����N( t _ranget _is_strc C s� g } t d d d � } xd t d � D]V } d d g } x* | D]" } d | d @| | <| d L} q? W| j d j | � � q% W| S( s� :return: A 256 element list containing 8-bit binary digit strings. The list index value is equivalent to its bit string value. i i����i i t 01i t N( R t ranget Nonet appendt join( t lookupt bits_per_bytet numt bitst i( ( sH /opt/imh-python/lib/python2.7/site-packages/netaddr/strategy/__init__.pyt bytes_to_bits s c C sl t | d � s t St | � | k r) t Sd | d } x. | D]& } d | k o[ | k n s> t Sq> Wt S( s6 :param words: A sequence of unsigned integer word values. :param word_size: Width (in bits) of each unsigned integer word value. :param num_words: Number of unsigned integer words expected. :return: ``True`` if word sequence is valid for this address type, ``False`` otherwise. t __iter__i i i ( t hasattrt Falset lent True( t wordst word_sizet num_wordst max_wordR ( ( sH /opt/imh-python/lib/python2.7/site-packages/netaddr/strategy/__init__.pyt valid_words! s c C s� d | | d } d | k o) | k n sG t d t | � � � n d | d } g } x; t | � D]- } | | @} | j t | � � | | L} qh Wt t | � � S( sJ :param int_val: Unsigned integer to be divided into words of equal size. :param word_size: Width (in bits) of each unsigned integer word value. :param num_words: Number of unsigned integer words expected. :return: A tuple contain unsigned integer word values split according to provided arguments. i i i s integer out of bounds: %r!( t IndexErrort hexR R t intt tuplet reversed( t int_valR R t max_intR R t _t word( ( sH /opt/imh-python/lib/python2.7/site-packages/netaddr/strategy/__init__.pyt int_to_words; s c C sp t | | | � s% t d | � � n d } x> t t | � � D]* \ } } | } | | | >} | | B} q> W| S( s5 :param words: A sequence of unsigned integer word values. :param word_size: Width (in bits) of each unsigned integer word value. :param num_words: Number of unsigned integer words expected. :return: An unsigned integer that is equivalent to value represented by word sequence. s" invalid integer word sequence: %r!i ( R t ValueErrort enumerateR ( R R R R R R R ( ( sH /opt/imh-python/lib/python2.7/site-packages/netaddr/strategy/__init__.pyt words_to_intV s R c C s� t | � s t S| d k r1 | j | d � } n t | � | k rG t Sd | d } y- d t | d � k ox | k n r� t SWn t k r� n Xt S( sl :param bits: A network address in a delimited binary string format. :param width: Maximum width (in bits) of a network address (excluding delimiters). :param word_sep: (optional) character or string used to delimit word groups (default: '', no separator). :return: ``True`` if network address is valid, ``False`` otherwise. R i i i ( R R t replaceR R R R" ( R t widtht word_sepR ( ( sH /opt/imh-python/lib/python2.7/site-packages/netaddr/strategy/__init__.pyt valid_bitsm s % c C sS t | | | � s% t d | � � n | d k rF | j | d � } n t | d � S( s� :param bits: A network address in a delimited binary string format. :param width: Maximum width (in bits) of a network address (excluding delimiters). :param word_sep: (optional) character or string used to delimit word groups (default: '', no separator). :return: An unsigned integer that is equivalent to value represented by network address in readable binary form. s# invalid readable binary string: %r!R i ( R( R" R% R ( R R& R' ( ( sH /opt/imh-python/lib/python2.7/site-packages/netaddr/strategy/__init__.pyt bits_to_int� s c C s� g } x� t | | | � D]{ } g } x) | rP | j t | d @� | d L} q( W| j � d j | � pq d | } d | | | } | j | � q W| d k r� t | � s� t d | � � q� n | j | � S( s� :param int_val: An unsigned integer. :param word_size: Width (in bits) of each unsigned integer word value. :param num_words: Number of unsigned integer words expected. :param word_sep: (optional) character or string used to delimit word groups (default: '', no separator). :return: A network address in a delimited binary string format that is equivalent in value to unsigned integer. i� i R t 0s# word separator is not a string: %r!( R! R t BYTES_TO_BITSt reverseR R R" ( R R R R' t bit_wordsR R t bit_str( ( sH /opt/imh-python/lib/python2.7/site-packages/netaddr/strategy/__init__.pyt int_to_bits� s c C s� t | � s t S| j d � s# t S| j d d � } t | � | k rK t Sd | d } y- d t | d � k o| | k n r� t SWn t k r� n Xt S( s :param bin_val: A network address in Python's binary representation format ('0bxxx'). :param width: Maximum width (in bits) of a network address (excluding delimiters). :return: ``True`` if network address is valid, ``False`` otherwise. t 0bR i i i ( R R t startswithR% R R R R" ( t bin_valR& R ( ( sH /opt/imh-python/lib/python2.7/site-packages/netaddr/strategy/__init__.pyt valid_bin� s % c C s� g } y t | � } Wn{ t k r� | } x5 | d k rc | d @} | j t | � | d L} q/ W| j � d t j d d d j | � � } n Xt | d � | k r� t d | � � n | S( s� :param int_val: An unsigned integer. :param width: Maximum allowed width (in bits) of a unsigned integer. :return: Equivalent string value in Python's binary representation format ('0bxxx'). i i� i R0 s ^[0]+([01]+)$s \1R i s binary string out of bounds: %s!( t bint NameErrorR R+ R, t _ret subR R R ( R R& t bin_tokensR2 R R ( ( sH /opt/imh-python/lib/python2.7/site-packages/netaddr/strategy/__init__.pyt int_to_bin� s &c C s; t | | � s" t d | � � n t | j d d � d � S( s9 :param bin_val: A string containing an unsigned integer in Python's binary representation format ('0bxxx'). :param width: Maximum allowed width (in bits) of a unsigned integer. :return: An unsigned integer that is equivalent to value represented by Python binary string format. s% not a valid Python binary string: %r!R0 R i ( R3 R" R R% ( R2 R& ( ( sH /opt/imh-python/lib/python2.7/site-packages/netaddr/strategy/__init__.pyt bin_to_int s ( t __doc__t reR6 t netaddr.compatR R R R+ R R! R$ R( R) R/ R3 R9 R: ( ( ( sH /opt/imh-python/lib/python2.7/site-packages/netaddr/strategy/__init__.pyt <module> s "
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