a
    jCiU  ã                   @   sl   d Z ddlZddlZddlZddlZg d¢Zi Zdd„ Zddd„Zddd	„Z	dd
d„Z
ddd„Zdd„ ZdS )zÃCache lines from Python source files.

This is intended to read lines from modules imported -- hence if a filename
is not found, it will look down the module search path for a file by
that name.
é    N)ÚgetlineÚ
clearcacheÚ
checkcacheÚ	lazycachec                   C   s   t  ¡  dS )zClear the cache entirely.N)ÚcacheÚclear© r   r   ú%/usr/local/lib/python3.9/linecache.pyr      s    r   c                 C   s6   t | |ƒ}d|  kr"t|ƒkr2n n||d  S dS )z~Get a line for a Python source file from the cache.
    Update the cache if it doesn't contain an entry for this file already.é   Ú )ÚgetlinesÚlen)ÚfilenameÚlinenoÚmodule_globalsÚlinesr   r   r	   r      s    
r   c                 C   sV   | t v r(t |  }t|ƒdkr(t |  d S zt| |ƒW S  tyP   tƒ  g  Y S 0 dS )z�Get the lines for a Python source file from the cache.
    Update the cache if it doesn't contain an entry for this file already.r
   é   N)r   r   ÚupdatecacheÚMemoryErrorr   )r   r   Úentryr   r   r	   r   $   s    r   c              	   C   s¶   | du rt t ¡ ƒ}n| tv r&| g}ndS |D ]‚} t|  }t|ƒdkrHq.|\}}}}|du r^q.zt |¡}W n" tyŽ   t | d¡ Y q.Y n0 ||jks¤||j	kr.t | d¡ q.dS )zUDiscard cache entries that are out of date.
    (This is not checked upon each call!)Nr
   )
Úlistr   Úkeysr   ÚosÚstatÚOSErrorÚpopÚst_sizeÚst_mtime)r   Ú	filenamesr   ÚsizeÚmtimer   Úfullnamer   r   r   r	   r   4   s&    
r   c                 C   s  | t v r$tt |  ƒdkr$t  | d¡ | r<|  d¡r@|  d¡r@g S | }zt |¡}W �n t�yf   | }t| |ƒrÞzt |  d ƒ }W n t	tfyš   Y nD0 |du r¬g  Y S t|ƒddd„ | 
¡ D ƒ|ft | < t |  d  Y S tj | ¡ròg  Y S tjD ]`}ztj ||¡}W n ttf�y*   Y qøY n0 zt |¡}W  �qbW qø t�yV   Y qø0 qøg  Y S Y n0 z8t |¡�}| ¡ }W d  ƒ n1 �s”0    Y  W n t�y¸   g  Y S 0 |�rà|d	  d
¡�sà|d	  d
7  < |j|j }	}
|	|
||ft | < |S )z”Update a cache entry and return its list of lines.
    If something's wrong, print a message, discard the cache entry,
    and return an empty list.r
   Nú<ú>r   c                 S   s   g | ]}|d  ‘qS )Ú
r   )Ú.0Úliner   r   r	   Ú
<listcomp>p   ó    zupdatecache.<locals>.<listcomp>r   éÿÿÿÿr$   )r   r   r   Ú
startswithÚendswithr   r   r   r   ÚImportErrorÚ
splitlinesÚpathÚisabsÚsysÚjoinÚ	TypeErrorÚAttributeErrorÚtokenizeÚopenÚ	readlinesr   r   )r   r   r!   r   ÚbasenameÚdataÚdirnameÚfpr   r   r    r   r   r	   r   P   s\    
ü


,
r   c                 C   sŒ   | t v r tt |  ƒdkrdS dS | r8|  d¡r<|  d¡r<dS |rˆd|v rˆ| d¡}|d }t|dd	ƒ}|rˆ|rˆt ||¡}|ft | < dS dS )
aî  Seed the cache for filename with module_globals.

    The module loader will be asked for the source only when getlines is
    called, not immediately.

    If there is an entry in the cache already, it is not altered.

    :return: True if a lazy load is registered in the cache,
        otherwise False. To register such a load a module loader with a
        get_source method must be found, the filename must be a cacheable
        filename, and the filename must not be already cached.
    r
   TFr"   r#   Ú
__loader__Ú__name__Ú
get_sourceN)r   r   r*   r+   ÚgetÚgetattrÚ	functoolsÚpartial)r   r   ÚnameÚloaderr=   Ú	get_linesr   r   r	   r   “   s    

r   )N)N)N)N)Ú__doc__r@   r0   r   r4   Ú__all__r   r   r   r   r   r   r   r   r   r   r	   Ú<module>   s   




C