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__init__.cpython-39.pyc
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a ��g7 � @ s| d Z ddlZddlmZmZ dd� Ze� Zdd� Zdd � Z d d � Z dd d�Z ddd�Z ddd�Z dd� Zdd� Zdd� ZdS ) z) Shared logic for various address types. � N)�_range�_is_strc C s^ g } t ddd�}td�D ]@}ddg }|D ] }d|d@ ||< |dL }q*| �d�|�� q| S ) z� :return: A 256 element list containing 8-bit binary digit strings. The list index value is equivalent to its bit string value. � ���� � NZ01� � )r �range�append�join)�lookupZ bits_per_byte�num�bits�i� r �=/usr/lib/python3.9/site-packages/netaddr/strategy/__init__.py� bytes_to_bits s r c C sT t | d�sdS t| �|kr dS d| d }| D ] }d| krF|ks.n dS q.dS )a6 :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. �__iter__F� r r T)�hasattr�len)�words� word_size� num_words�max_wordr r r r � valid_words! s r c C s~ d|| d }d| kr$|ks6n t dt| � ��d| d }g }t|�D ]"}| |@ }|�t|�� | |L } qNtt|��S )aJ :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. r r r zinteger out of bounds: %r!)� IndexError�hexr r �int�tuple�reversed)�int_valr r �max_intr r �_�wordr r r � int_to_words; s r& c C sP t | ||�std| f ��d}tt| ��D ] \}}|}||| > }||B }q*|S )a5 :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. z"invalid integer word sequence: %r!r )r � ValueError� enumerater! )r r r r" r r r% r r r � words_to_intV s r) r c C s| t | �s dS |dkr | �|d�} t| �|kr0dS d| d }z(dt| d� krX|krbn nW dS W n tyv Y n0 dS )al :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. Fr r r r T)r �replacer r r' )r �width�word_sepr# r r r � valid_bitsm s r- c C s8 t | ||�std| f ��|dkr.| �|d�} t| d�S )a� :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. z#invalid readable binary string: %r!r r )r- r' r* r )r r+ r, r r r � bits_to_int� s r. c C s� g }t | ||�D ]b}g }|r8|�t|d@ � |dL }q|�� d�|�pPd| }d| | | d� }|�|� q|dkr�t|�s�td|f ��|�|�S )a� :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. � r r �0Nz#word separator is not a string: %r!)r& r � BYTES_TO_BITS�reverser r r' )r" r r r, Z bit_wordsr% r Zbit_strr r r � int_to_bits� s r3 c C s� t | �s dS | �d�sdS | �dd�} t| �|kr6dS d| d }z(dt| d� kr^|krhn nW dS W n ty| Y n0 dS )a :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. F�0br r r r T)r � startswithr* r r r' )�bin_valr+ r# r r r � valid_bin� s r7 c C s� g }z t | �}W n^ tyn | }|dkrJ|d@ }|�t| � |dL }q"|�� dt�ddd�|�� }Y n0 t|dd � �|kr�t d |f ��|S ) z� :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'). r r/ r r4 z ^[0]+([01]+)$z\1r r Nz binary string out of bounds: %s!) �bin� NameErrorr r1 r2 �_re�subr r r )r" r+ Z bin_tokensr6 r r% r r r � int_to_bin� s r< c C s* t | |�std| f ��t| �dd�d�S )a9 :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. z%not a valid Python binary string: %r!r4 r r )r7 r' r r* )r6 r+ r r r � bin_to_int s r= )r )r )r )�__doc__�rer: Znetaddr.compatr r r r1 r r& r) r- r. r3 r7 r< r= r r r r �<module> s "