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d�Zddd�Zdd� ZdS )z�Interface to the libbzip2 compression library.
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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
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Note that BZ2File provides a *binary* file interface - data read is
returned as bytes, and data to be written should be given as bytes.
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f�rkt||�| _ d| _|| _nt|d�sut|d�r||| _ || _ntd��| jtkr�tj| j ttd�}t�|�| _dS d| _dS )a Open a bzip2-compressed file.
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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
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t| _ d| _w )z�Flush and close the file.
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Read a line of uncompressed bytes from the file.
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zBZ2File.readlinec C rL )z�Read a list of lines of uncompressed bytes from the file.
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|� | j |7 _ |S )a Write a byte string to the file.
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Returns the new file position.
Note that seeking is emulated, so depending on the parameters,
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)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
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)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+ �
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r c C s t |�}|�| �|�� S )z�Compress a block of data.
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For incremental compression, use a BZ2Compressor object instead.
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�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.
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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 �
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