o
    re)                  
   @   s  d Z ddlmZ ddlZddlmZ dd ZdeiZd'dd	Z	d(ddZ
e	de
d zddlmZ W n	 ey;   Y nw e	ded zddlmZ d)ddZe	ded W n eyl   ddlmZ e	ddd d Y nw zddlmZ e	ded e	deddd W n	 ey   Y nw zddlZe	dejddd e	dejddd W n	 ey   Y nw G dd deZzddlZej e	deg  W n eeefy   Y nw zddlZe	d ejjd  W n	 ey   Y nw zddlZd)d!d"Z e	d#e d$ W n
 ey   Y nw d%d& Z!dS )*z9Helper functions for a standard streaming compression API    )ZipFileN)AbstractBufferedFilec                 K   s   | S N )filemodekwargsr   r   BD:\Projects\ConvertPro\env\Lib\site-packages\fsspec/compression.py	noop_file      r
   Fc                 C   st   t |tr|g}| tv r|std|  |D ]}|tjjv r(|s(td|| f q|t| < |D ]}| tjj|< q/dS )aA  Register an "inferable" file compression type.

    Registers transparent file compression type for use with fsspec.open.
    Compression can be specified by name in open, or "infer"-ed for any files
    ending with the given extensions.

    Args:
        name: (str) The compression type name. Eg. "gzip".
        callback: A callable of form (infile, mode, **kwargs) -> file-like.
            Accepts an input file-like object, the target mode and kwargs.
            Returns a wrapped file-like object.
        extensions: (str, Iterable[str]) A file extension, or list of file
            extensions for which to infer this compression scheme. Eg. "gz".
        force: (bool) Force re-registration of compression type or extensions.

    Raises:
        ValueError: If name or extensions already registered, and not force.

    z&Duplicate compression registration: %sz-Duplicate compression file extension: %s (%s)N)
isinstancestrcompr
ValueErrorfsspecutilscompressions)namecallback
extensionsforceextr   r   r	   register_compression   s   

r   rbc                    s|   d|vr%|pd}t | fddi|  j|dd}|jf fdd	|_|S t |  |d u r3  d } j|fddi|S )	Nrr   r   w)r   c                    s   |  p   S r   )close)closerzr   r	   <lambda>=   s    zunzip.<locals>.<lambda>r   )r   openr   namelist)infiler   filenamer   for   r   r	   unzip8   s   r&   zip)BZ2Filebz2)igzipc                 K   s   t jd| |d|S )N)fileobjr   r   )r*   Z	IGzipFile)r#   r   r   r   r   r	   isalQ   s   r,   gzipgzGzipFilec                 K   s   t dd| i|S )Nr+   r   r/   )fr   r   r   r	   r    Y   s    r    )LZMAFilelzmaxzT)r   c                       s@   e Zd Z fddZdddZdddZd	d
 Zdd Z  ZS )
SnappyFilec                    sX   dd l }t jdd d|dd dd| || _d|v r%| | _d S | | _d S )Nr   snappybiɚ;)fspathr   sizer   r   )r6   super__init__stripr#   ZStreamDecompressorcodecZStreamCompressor)selfr#   r   r   r6   	__class__r   r	   r<   n   s   zSnappyFile.__init__Fc                 C   s.   | j d | j| j  }| j| dS )Nr   T)bufferseekr>   Z	add_chunkreadr#   write)r?   finaloutr   r   r	   _upload_chunkz   s   zSnappyFile._upload_chunkr   c                 C   s   t d)NzSnappyFile is not seekable)NotImplementedError)r?   locwhencer   r   r	   rC      s   zSnappyFile.seekc                 C   s   dS )NFr   )r?   r   r   r	   seekable   r   zSnappyFile.seekablec                 C   s   | j || }| j|S )z*Get the specified set of bytes from remote)r#   rD   r>   
decompress)r?   startenddatar   r   r	   _fetch_range   s   zSnappyFile._fetch_rangeF)r   )	__name__
__module____qualname__r<   rH   rC   rL   rQ   __classcell__r   r   r@   r	   r5   m   s    

r5   r6   lz4c                 C   s0   d|v rt  }|| S t jdd}|| S )Nr   
   )level)zstdZZstdDecompressorstream_readerZZstdCompressorZstream_writer)r#   r   Zcctxr   r   r	   zstandard_file   s
   

r\   rZ   Zzstc                   C   s   t tS )z.Return a list of the implemented compressions.)listr   r   r   r   r	   available_compressions   s   r^   rR   )r   N)r   )"__doc__zipfiler   Zfsspec.utilsr   Zfsspec.specr   r
   r   r   r&   r)   r(   ImportErrorr,   r*   r-   r0   r3   r2   Zlzmaffir5   r6   compress	NameErrorAttributeErrorZ	lz4.framerW   framer!   Z	zstandardrZ   r\   r^   r   r   r   r	   <module>   sz    

'


