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bz2.cpython-310.pyc
o ���hG. � @ s� d Z g d�ZdZddlmZ ddlZddlZddlZddl m Z m Z dZ dZ dZG d d � d ej�Z dd d�Zddd�Zdd� ZdS )z�Interface to the libbzip2 compression library. This module provides a file interface, classes for incremental (de)compression, and functions for one-shot (de)compression. )�BZ2File� BZ2Compressor�BZ2Decompressor�open�compress� decompressz%Nadeem Vawda <nadeem.vawda@gmail.com>� )r N)r r � � c @ s� e Zd ZdZd*dd�dd�Zdd� Zed d � �Zd d � Zd d� Z dd� Z dd� Z d+dd�Z d,dd�Z d,dd�Zdd � Zd,d d �Zd,d d �Zd!d"� Zd#d$� Zejfd%d&�Zd'd(� Zd)S )-r a@ A file object providing transparent bzip2 (de)compression. A BZ2File can act as a wrapper for an existing file object, or refer directly to a named file on disk. Note that BZ2File provides a *binary* file interface - data read is returned as bytes, and data to be written should be given as bytes. �r� �� compresslevelc C s6 d| _ d| _t| _d| krdkstd�� td��|dv r$d}t}n1|dv r2d }t}t|�| _n#|d v r@d }t}t|�| _n|d v rNd }t}t|�| _ntd|f ��t |t t t j f�rkt||�| _ d| _|| _nt|d�sut|d�r||| _ || _ntd��| jtkr�tj| j ttd�}t�|�| _dS d| _dS )a Open a bzip2-compressed file. If filename is a str, bytes, or PathLike object, it gives the name of the file to be opened. Otherwise, it should be a file object, which will be used to read or write the compressed data. mode can be 'r' for reading (default), 'w' for (over)writing, 'x' for creating exclusively, or 'a' for appending. These can equivalently be given as 'rb', 'wb', 'xb', and 'ab'. If mode is 'w', 'x' or 'a', compresslevel can be a number between 1 and 9 specifying the level of compression: 1 produces the least compression, and 9 (default) produces the most compression. If mode is 'r', the input file may be the concatenation of multiple compressed streams. NFr r z%compresslevel must be between 1 and 9)� r �rbr )�w�wbr )�x�xbr )�a�abr �Invalid mode: %rT�read�writez6filename must be a str, bytes, file or PathLike object)Ztrailing_errorr )�_fp�_closefp� _MODE_CLOSED�_mode� ValueError� _MODE_READ� _MODE_WRITEr � _compressor� isinstance�str�bytes�os�PathLike� _builtin_open�hasattr� TypeError� _compressionZDecompressReaderr �OSError�io�BufferedReader�_buffer�_pos)�self�filename�moder Z mode_code�raw� r3 �*/opt/alt/python310/lib64/python3.10/bz2.py�__init__% sJ � � zBZ2File.__init__c C s | j tkrdS zQ| j tkr| j�� n| j tkr$| j�| j� � � d| _W z&| j r=| j�� W d| _d| _ t| _ d| _dS W d| _d| _ t| _ d| _dS d| _d| _ t| _ d| _w z$| j rp| j�� W d| _d| _ t| _ d| _w W d| _d| _ t| _ d| _w d| _d| _ t| _ d| _w )z�Flush and close the file. May be called more than once without error. Once the file is closed, any other operation on it will raise a ValueError. NF) r r r r- �closer r r r �flushr �r/ r3 r3 r4 r6 a sR � � �� ��z BZ2File.closec C s | j tkS )z True if this file is closed.)r r r8 r3 r3 r4 �closedy s zBZ2File.closedc C s | � � | j�� S )z3Return the file descriptor for the underlying file.)�_check_not_closedr �filenor8 r3 r3 r4 r; ~ � zBZ2File.filenoc C s | � � o| j�� S )z)Return whether the file supports seeking.)�readabler- �seekabler8 r3 r3 r4 r> � s zBZ2File.seekablec C � | � � | jtkS )z/Return whether the file was opened for reading.)r: r r r8 r3 r3 r4 r= � r< zBZ2File.readablec C r? )z/Return whether the file was opened for writing.)r: r r r8 r3 r3 r4 �writable� r< zBZ2File.writabler c C � | � � | j�|�S )z�Return buffered data without advancing the file position. Always returns at least one byte of data, unless at EOF. The exact number of bytes returned is unspecified. )�_check_can_readr- �peek)r/ �nr3 r3 r4 rC � s z BZ2File.peek���c C rA )z�Read up to size uncompressed bytes from the file. If size is negative or omitted, read until EOF is reached. Returns b'' if the file is already at EOF. )rB r- r �r/ �sizer3 r3 r4 r � s z BZ2File.readc C s" | � � |dk r tj}| j�|�S )z�Read up to size uncompressed bytes, while trying to avoid making multiple reads from the underlying stream. Reads up to a buffer's worth of data if size is negative. Returns b'' if the file is at EOF. r )rB r+ �DEFAULT_BUFFER_SIZEr- �read1rF r3 r3 r4 rI � s z BZ2File.read1c C rA )zRRead bytes into b. Returns the number of bytes read (0 for EOF). )rB r- �readinto)r/ �br3 r3 r4 rJ � s zBZ2File.readintoc C �8 t |t�st|d�std��|�� }| �� | j�|�S )a Read a line of uncompressed bytes from the file. The terminating newline (if present) is retained. If size is non-negative, no more than size bytes will be read (in which case the line may be incomplete). Returns b'' if already at EOF. � __index__�Integer argument expected)r! �intr' r( rM rB r- �readlinerF r3 r3 r4 rP � � zBZ2File.readlinec C rL )z�Read a list of lines of uncompressed bytes from the file. size can be specified to control the number of lines read: no further lines will be read once the total size of the lines read so far equals or exceeds size. rM rN )r! rO r' r( rM rB r- � readlinesrF r3 r3 r4 rR � rQ zBZ2File.readlinesc C sX | � � t|ttf�rt|�}nt|�}|j}| j�|�}| j � |� | j |7 _ |S )a Write a byte string to the file. Returns the number of uncompressed bytes written, which is always the length of data in bytes. Note that due to buffering, the file on disk may not reflect the data written until close() is called. ) Z_check_can_writer! r# � bytearray�len� memoryview�nbytesr r r r r. )r/ �dataZlengthZ compressedr3 r3 r4 r � s z BZ2File.writec C s t j�| |�S )z�Write a sequence of byte strings to the file. Returns the number of uncompressed bytes written. seq can be any iterable yielding byte strings. Line separators are not added between the written byte strings. )r) � BaseStream� writelines)r/ �seqr3 r3 r4 rY � s zBZ2File.writelinesc C s | � � | j�||�S )a� Change the file position. The new position is specified by offset, relative to the position indicated by whence. Values for whence are: 0: start of stream (default); offset must not be negative 1: current stream position 2: end of stream; offset must not be positive Returns the new file position. Note that seeking is emulated, so depending on the parameters, this operation may be extremely slow. )Z_check_can_seekr- �seek)r/ �offset�whencer3 r3 r4 r[ � s z BZ2File.seekc C s" | � � | jtkr| j�� S | jS )z!Return the current file position.)r: r r r- �tellr. r8 r3 r3 r4 r^ s z BZ2File.tellN)r )r )rE )�__name__� __module__� __qualname__�__doc__r5 r6 �propertyr9 r; r> r= r@ rC r rI rJ rP rR r rY r+ �SEEK_SETr[ r^ r3 r3 r3 r4 r s( < r r r c C s� d|v rd|v rt d|f ��n|durt d��|dur t d��|dur(t d��|�dd�}t| ||d �}d|v rFt�|�}t�||||�S |S ) a Open a bzip2-compressed file in binary or text mode. The filename argument can be an actual filename (a str, bytes, or PathLike object), or an existing file object to read from or write to. The mode argument can be "r", "rb", "w", "wb", "x", "xb", "a" or "ab" for binary mode, or "rt", "wt", "xt" or "at" for text mode. The default mode is "rb", and the default compresslevel is 9. For binary mode, this function is equivalent to the BZ2File constructor: BZ2File(filename, mode, compresslevel). In this case, the encoding, errors and newline arguments must not be provided. For text mode, a BZ2File object is created, and wrapped in an io.TextIOWrapper instance with the specified encoding, error handling behavior, and line ending(s). �trK r Nz0Argument 'encoding' not supported in binary modez.Argument 'errors' not supported in binary modez/Argument 'newline' not supported in binary moder r )r �replacer r+ � text_encoding� TextIOWrapper)r0 r1 r �encoding�errors�newlineZbz_modeZ binary_filer3 r3 r4 r s � r c C s t |�}|�| �|�� S )z�Compress a block of data. compresslevel, if given, must be a number between 1 and 9. For incremental compression, use a BZ2Compressor object instead. )r r r7 )rW r �compr3 r3 r4 r 9 s r c C sb g }| r,t � }z|�| �}W n ty |rY n� w |�|� |js'td��|j} | sd�|�S )zjDecompress a block of data. For incremental decompression, use a BZ2Decompressor object instead. zACompressed data ended before the end-of-stream marker was reached� )r r r* �append�eofr Z unused_data�join)rW ZresultsZdecomp�resr3 r3 r4 r D s � � r )r r NNN)r )rb �__all__� __author__�builtinsr r& r+ r$ r) Z_bz2r r r r r rX r r r r3 r3 r3 r4 �<module> s$ v � *
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