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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.
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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� 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 �
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d d� q )Nz Unable to find global headerT)r# r$ � r � )�read�GLOBAL_HEADER_LENGTH�
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| j | S )a Return the (last occurrence of a) member in the archive whose name
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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.
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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
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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
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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 � � }|�
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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
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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
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�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
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