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arfile.cpython-310.pyc
o ���a�5 � @ s� d Z ddlZzddlmZmZmZmZmZmZm Z m Z m Z W n e y' Y nw dZ ee �ZdZdZG dd� de�ZG d d � d e�ZG d d � d e�Zed kr]ed�Zed�e�� �� dS dS )z� Representation of ar archives for use with Debian binary packages These classes are primarily intended to be used with the :class:`debian.debfile.DebFile` class for working with Debian binary packages. � N) �Any�BinaryIO�Dict� Generator�IO�Iterator�List�NoReturn�Optionals !<arch> �< s ` c @ s e Zd ZdZdS )�ArErrorz@ Common base for all exceptions raised within the arfile module N)�__name__� __module__� __qualname__�__doc__� r r �//usr/lib/python3/dist-packages/debian/arfile.pyr 3 s r c @ s| e Zd ZdZ ddd�Zdd� Zdd � Zd d � Zd d � Ze e�Z dd� Z dd� Z dd� Z dd� Zdd� Zdd� ZdS )�ArFilea Representation of an ar archive, see man 1 ar. The interface of this class tries to mimic that of the TarFile module in the standard library. ArFile objects have the following (read-only) properties: - members same as getmembers() N�rc C sP g | _ i | _|| _|| _|pt�� | _|du rd}|| _|dkr&| �� dS dS )a� Build an ar file representation starting from either a filename or an existing file object. The only supported mode is 'r'. The encoding and errors parameters control how member names are decoded into Unicode strings. Like tarfile, the default encoding is sys.getfilesystemencoding() and the default error handling scheme is 'surrogateescape'. N�surrogateescaper ) �_ArFile__members�_ArFile__members_dict�_ArFile__fname�_ArFile__fileobj�sys�getfilesystemencoding�_ArFile__encoding�_ArFile__errors�_ArFile__index_archive)�self�filename�mode�fileobj�encoding�errorsr r r �__init__A s �zArFile.__init__c C s` | j r!t| j d��}| �|� W d � d S 1 sw Y d S | jr,| �| j� d S td��)N�rbzUnable to open valid file)r �open�_ArFile__collect_membersr r )r �fpr r r �__index_archive^ s "�zArFile.__index_archivec C s� |� t�tkr td�� tj|| j| j| jd�}|s d S | j � |� || j |j < |j d dkr7|�|j d� n |�|j d d� q )Nz Unable to find global headerT)r# r$ � r � )�read�GLOBAL_HEADER_LENGTH� GLOBAL_HEADERr �ArMember� from_filer r r r �appendr �name�size�seek)r r) � newmemberr r r �__collect_membersh s � �zArFile.__collect_membersc C s | j | S )a Return the (last occurrence of a) member in the archive whose name is 'name'. Raise KeyError if no member matches the given name. Note that in case of name collisions the only way to retrieve all members matching a given name is to use getmembers. )r �r r3 r r r � getmemberz s zArFile.getmemberc C � | j S )z� Return a list of all members contained in the archive. The list has the same order of members in the archive and can contain duplicate members (i.e. members with the same name) if they are duplicate in the archive itself. �r �r r r r � getmembers� s zArFile.getmembersc C s dd� | j D �S )z3 Return a list of all member names in the archive. c S s g | ]}|j �qS r )r3 )�.0�fr r r � <listcomp>� s z#ArFile.getnames.<locals>.<listcomp>r; r< r r r �getnames� s zArFile.getnamesc C � t ��z Not (yet) implemented. ��NotImplementedErrorr< r r r � extractall� � zArFile.extractallc C rB rC rD )r �member�pathr r r �extract� rG zArFile.extractc C s@ | j D ]}t|t�r|j|jkr| S ||jkr | S qdS )z� Return a file object corresponding to the requested member. A member can be specified either as a string (its name) or as a ArMember instance. N)r � isinstancer0 r3 )r rH �mr r r � extractfile� s �zArFile.extractfilec C s t | j�S )z5 Iterate over the members of the present ar archive. )�iterr r< r r r �__iter__� � zArFile.__iter__c C s | � |�S )z Same as .getmember(name). )r9 r8 r r r � __getitem__� rP zArFile.__getitem__)Nr NNN)r r r r r% r r( r9 r= �property�membersrA rF rJ rM rO rQ r r r r r 7 s& � r c @ s� e Zd ZdZdd� Ze d"dd��Zd#dd �Zd$d d �Zd#d d �Z d#dd�Z dd� Z dd� Z dd� Z dd� Zdd� Zedd� �Zed d� �Zed d� �Zed d� �Zed d� �Zed d� �Zed!d� �ZdS )%r0 a� Member of an ar archive. Implements most of a file object interface: read, readline, next, readlines, seek, tell, close. ArMember objects have the following (read-only) properties: - name member name in an ar archive - mtime modification time - owner owner user - group owner group - fmode file permissions - size size in bytes - fname file namec C sF d | _ d | _d | _d | _d | _d | _d| _d | _d| _d| _ d| _ d S )N� r ) �_ArMember__name�_ArMember__mtime�_ArMember__owner�_ArMember__group�_ArMember__fmode�_ArMember__size�_ArMember__fname� _ArMember__fp�_ArMember__offset�_ArMember__end�_ArMember__curr< r r r r% � s zArMember.__init__Nc C s | � t�}|s dS t|�tk rtd��|dd� tkr td��|du r't�� }|du r-d}t� }|dd� �d �d � � }|� ||�|_ t |dd � �|_ t |d d � �|_t |d d � �|_|d d � |_t |d d� �|_||_|sw| |_| �� |_|j|j |_|j|_|S )z�fp is an open File object positioned on a valid file header inside an ar archive. Return a new ArMember on success, None otherwise. NzIncorrect header length�: r zIncorrect file magicr r � � /� �" �( �0 )r- �FILE_HEADER_LENGTH�len�IOError� FILE_MAGICr r r0 �split�strip�decoderU �intrV rW rX rY rZ r[ r\ �tellr] r^ r_ )r) �fnamer# r$ �bufr? r3 r r r r1 � s4 zArMember.from_filer c C s� | j d u r| jd u rtd��t| jd�| _ | j �| j� d| k r*| j| j kr:n n| j �|�}| j �� | _|S | j| jksF| j| j k rHdS | j �| j| j �}| j �� | _|S )N�'Cannot have both fp and fname undefinedr& r � ) r\ r[ � ValueErrorr' r5 r_ r^ r- ro r] �r r4 rq r r r r- , s z ArMember.readc C s� | j d u r| jd u rtd��t| jd�| _ | j �| j� |d ur6| j �|�}| j �� | _| j| jkr4dS |S | j �� }| j �� | _| j| jkrIdS |S )Nrr r& rs ) r\ r[ rt r' r5 r_ �readlinero r^ ru r r r rv @ s zArMember.readlinec C s( d }g } | � � }|s |S |�|� q�N)rv r2 )r �sizehintrq �linesr r r � readlinesV s ��zArMember.readlinesc C s� | j | jk r | j| _ |dk r || j | jk r td| ��|dkr(| j | | _ d S |dkr4| j| | _ d S |dkr@| j| | _ d S d S )Nr+ zCan't seek at %dr, r )r_ r] ri r^ )r �offset�whencer r r r5 c s �z ArMember.seekc C s | j | jk rdS | j | j S )Nr )r_ r] r< r r r ro r s z ArMember.tellc C s dS )NTr r< r r r �seekablex s zArMember.seekablec C s0 | j d ur| jd ur| j �� d | _ d S d S d S rw )r\ r[ �closer< r r r r~ } s �zArMember.closec C s | � � S rw �rv r< r r r �next� s z ArMember.nextc s � fdd�}t |� �S )Nc 3 s � � � � } | r | V d S d S rw r )�liner< r r �nextline� s � �z#ArMember.__iter__.<locals>.nextline)rN )r r� r r< r rO � s zArMember.__iter__c C r: rw )rU r< r r r �<lambda>� � zArMember.<lambda>c C r: rw )rV r< r r r r� � r� c C r: rw )rW r< r r r r� � r� c C r: rw )rX r< r r r r� � r� c C r: rw )rY r< r r r r� � r� c C r: rw )rZ r< r r r r� � r� c C r: rw )r[ r< r r r r� � r� )NN)r rw )r r r r r% � staticmethodr1 r- rv rz r5 ro r} r~ r� rO rR r3 �mtime�owner�group�fmoder4 rp r r r r r0 � s. � = r0 �__main__ztest.ar� ) r r �typingr r r r r r r r r � ImportErrorr/ rh r. rg rj � Exceptionr �objectr r0 r �a�print�joinrA r r r r �<module> s( 0 � U�