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e�Zedkr�ed�Zed�e�� �� 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.
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c @ s e Zd ZdZdS )�ArErrorz@ Common base for all exceptions raised within the arfile module N)�__name__�
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dd� 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 sd g | _ i | _|| _|| _|dkr(t�� }|| _|dkrJtjdkrFd}nd}|| _|dkr`| � � dS )a� Build an ar file representation starting from either a filename or
an existing file object. The only supported mode is 'r'.
In Python 3, 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' (>= 3.2) or 'strict' (< 3.2).
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�_ArFile__members�_ArFile__members_dict�_ArFile__fname�_ArFile__fileobj�sys�getfilesystemencoding�_ArFile__encoding�version�_ArFile__errors�_ArFile__index_archive)�self�filename�modeZfileobj�encoding�errorsr r r �__init__? s
zArFile.__init__c C s� | j rt| j d�}n| jr"| j}ntd��|�t�tkr@td��tj|| j | j | j
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|j< |jd dkr�|�|jd� q@|�|jd d� q@| j r�|�� d S )N�rbzUnable to open valid filez Unable to find global header)r" r# � r � )r �openr r �read�GLOBAL_HEADER_LENGTH�
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members matching a given name is to use getmembers. )r �r r/ r r r � getmember| s zArFile.getmemberc C s | j S )z� Return a list of all members contained in the archive.
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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 | ]
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<listcomp>� s z#ArFile.getnames.<locals>.<listcomp>r6 r7 r r r �getnames� s zArFile.getnamesc C s t �dS �z Not (yet) implemented. N��NotImplementedErrorr7 r r r �
extractall� s zArFile.extractallc C s t �dS r= r> )r �member�pathr r r �extract� s zArFile.extractc C s@ | j D ]4}t|t�r(|j|jkr(| S ||jkr| S qdS )z� Return a file object corresponding to the requested member. A member
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instance. N)r �
isinstancer, r/ )r rA �mr r r � extractfile� s
zArFile.extractfilec C s
t | j�S )z5 Iterate over the members of the present ar archive. )�iterr r7 r r r �__iter__� s zArFile.__iter__c C s
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dd� Zdd� Zedd� �Zed d� �Zed d� �Zed d� �Zed d� �Zed d� �Zed!d� �ZdS )'r, 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__curr7 r r r r$ � s zArMember.__init__Nc C sJ | � t�}|sdS t|�tk r&td��|dd� tkr>td��tjdkrv|dkrXt�� }|dkr~tjdkrpd}q~d }nd
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an ar archive. Return a new ArMember on success, None otherwise. NzIncorrect header length�: r zIncorrect file magic�3r r r rL r � � /� �" �( �0 )r) �FILE_HEADER_LENGTH�len�IOError�
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zArMember.from_filer c C s� | j d krt| jd�| _ | j �| j� d| k rB| j| j krbn n | j �|�}| j �� | _|S | j| jksz| j| jk r~dS | j �| j| j �}| j �� | _|S )Nr% r � ) rT r( rS r1 rW rV r) rh rU �r r0 rj r r r r) 2 s
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ArMember.readc C s� | j d krt| jd�| _ | j �| j� |d k rZ| j �|�}| j �� | _| j| jkrVdS |S | j �� }| j �� | _| j| jkr�dS |S )Nr% rk )rT r( rS r1 rW �readlinerh rV rl r r r rm D s
zArMember.readlinec C s& d }g }| � � }|sq"|�|� q|S �N)rm r. )r �sizehintrj �linesr r r � readlinesX s zArMember.readlinesc C s| | j | jk r| j| _ |dk r8|| j | jk r8td| ��|dkrN| j | | _ n*|dkrd| j| | _ n|dkrx| j| | _ d S )Nr& zCan't seek at %dr' r )rW rU rb rV )r �offset�whencer r r r1 e s z
ArMember.seekc C s | j | jk rdS | j | j S )Nr )rW rU r7 r r r rh t s z
ArMember.tellc C s dS )NTr r7 r r r �seekablez s zArMember.seekablec C s( | j d k r$| jd k r$| j �� d | _ d S rn )rT rS r2 r7 r r r r2 s
zArMember.closec C s | � � S rn �rm r7 r r r �next� s z
ArMember.nextc s � fdd�}t |� �S )Nc 3 s � � � } | r| V d S rn ru )�liner7 r r �nextline� s z#ArMember.__iter__.<locals>.nextline)rG )r rx r r7 r rH � s zArMember.__iter__c C s | j S rn )rM r7 r r r �<lambda>� rk zArMember.<lambda>c C s | j S rn )rN r7 r r r ry � rk c C s | j S rn )rO r7 r r r ry � rk c C s | j S rn )rP r7 r r r ry � rk c C s | j S rn )rQ r7 r r r ry � rk c C s | j S rn )rR r7 r r r ry � rk c C s | j S rn )rS r7 r r r ry � rk )NN)r )N)r )r )r
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