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Editing: _compression.cpython-35.pyc
��Yf� � @ sQ d Z d d l Z e j Z Gd d � d e j � Z Gd d � d e j � Z d S)z7Internal classes used by the gzip, lzma and bz2 modules� Nc @ sF e Z d Z d Z d d � Z d d � Z d d � Z d d � Z d S) � BaseStreamz Mode-checking helper functions.c C s | j r t d � � d S)Nz I/O operation on closed file)�closed� ValueError)�self� r �1/opt/alt/python35/lib64/python3.5/_compression.py�_check_not_closed s z BaseStream._check_not_closedc C s | j � s t j d � � d S)NzFile not open for reading)�readable�io�UnsupportedOperation)r r r r �_check_can_read s zBaseStream._check_can_readc C s | j � s t j d � � d S)NzFile not open for writing)�writabler r )r r r r �_check_can_write s zBaseStream._check_can_writec C s: | j � s t j d � � | j � s6 t j d � � d S)Nz3Seeking is only supported on files open for readingz3The underlying file object does not support seeking)r r r �seekable)r r r r �_check_can_seek s zBaseStream._check_can_seekN)�__name__� __module__� __qualname__�__doc__r r r r r r r r r s r c s� e Z d Z d Z d d � Z f d d � Z � f d d � Z d d � Z d d � Z d d d � Z d d � Z e j d d � Z d d � Z � S)�DecompressReaderz5Adapts the decompressor API to a RawIOBase reader APIc C s d S)NTr )r r r r r $ s zDecompressReader.readablec K sX | | _ d | _ d | _ d | _ | | _ | | _ | j | j � | _ | | _ d S)NFr � ���)�_fp�_eof�_pos�_size�_decomp_factory� _decomp_args� _decompressor�_trailing_error)r �fpZdecomp_factoryZtrailing_errorZ decomp_argsr r r �__init__' s zDecompressReader.__init__c s d | _ t � j � S)N)r �super�close)r )� __class__r r r# ; s zDecompressReader.closec C s | j j � S)N)r r )r r r r r ? s zDecompressReader.seekablec C sd t | � �K } | j d � �2 } | j t | � � } | | d t | � � <Wd QRXWd QRXt | � S)N�B)� memoryview�cast�read�len)r �bZviewZ byte_view�datar r r �readintoB s !$zDecompressReader.readintor c C s? | d k r | j � S| s& | j r* d Sd } x� | j j r� | j j pZ | j j t � } | sd P| j | j � | _ y | j j | | � } Wq� | j k r� PYq� XnN | j j r� | j j t � } | s� t d � � n d } | j j | | � } | r3 Pq3 W| s&d | _ | j | _ d S| j t | � 7_ | S)Nr � zACompressed file ended before the end-of-stream marker was reachedT)�readallr r �eofZ unused_datar r( � BUFFER_SIZEr r Z decompressr Z needs_input�EOFErrorr r r) )r �sizer+ Zrawblockr r r r( H s> zDecompressReader.readc C s; | j j d � d | _ d | _ | j | j � | _ d S)Nr F)r �seekr r r r r )r r r r �_rewindr s zDecompressReader._rewindc C s | t j k r n{ | t j k r1 | j | } n\ | t j k rx | j d k rh x | j t j � rg qR W| j | } n t d j | � � � | | j k r� | j � n | | j 8} xB | d k r� | j t t j | � � } | s� P| t | � 8} q� W| j S)Nr z Invalid value for whence: {}) r �SEEK_SET�SEEK_CURr �SEEK_ENDr r( �DEFAULT_BUFFER_SIZEr �formatr4 �minr) )r �offset�whencer+ r r r r3 x s& zDecompressReader.seekc C s | j S)z!Return the current file position.)r )r r r r �tell� s zDecompressReader.tellr )r r r r r r! r# r r, r( r4 r r5 r3 r= r r )r$ r r ! s * r )r r r8 r0 �BufferedIOBaser � RawIOBaser r r r r �<module> s
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