Spade

Mini Shell

Directory:~$ /proc/self/root/usr/lib64/python3.6/dbm/__pycache__/
Upload File
[Home] [System Details] [Kill Me]
Current File:~$ //proc/self/root/usr/lib64/python3.6/dbm/__pycache__/dumb.cpython-36.pyc

3


 \�.�@sTdZddlZddlZddlZddlZddgZdZ	e
ZGdd�dej�Z
dd
d�ZdS)a�A dumb and slow but simple dbm clone.

For database spam, spam.dir contains the index (a text file),
spam.bak *may* contain a backup of the index (also a text file),
while spam.dat contains the data (a binary file).

XXX TO DO:

- seems to contain a bug when updating...

- reclaim free space (currently, space once occupied by deleted or expanded
items is never reused)

- support concurrent access (currently, if two processes take turns making
updates, they can mess up the index)

- support efficient access to large databases (currently, the whole index
is read when the database is opened, and some updates rewrite the whole
index)

- support opening for read-only (flag = 'm')

�N�error�openic@s�eZdZeZeZd+dd�Zdd�Zdd�Zdd	�ZeZ	d
d�Z
dd
�Zdd�Zdd�Z
dd�Zdd�Zdd�Zdd�Zdd�Zdd�Zdd�ZeZd
d!�Zd"d#�ZeZd$d%�Zd&d'�Zd(d)�Zd*S),�	_Database�ccCsJ||_|dk|_|d|_|d|_|d|_d|_|j|�|j�dS)N�rz.dirz.datz.bak)�_mode�	_readonly�_dirfile�_datfile�_bakfile�_index�_create�_update)�selfZfilebasename�mode�flag�r�/usr/lib64/python3.6/dumb.py�__init__0s




z_Database.__init__cCs�|dkrFx<|j|j|jfD](}ytj|�Wqtk
r@YqXqWytj|jddd�}Wn^tk
r�|dkr�ddl}|j	dt
dd	�tj|jd
dd��}|j|j�WdQRXYn
X|j�dS)N�nrzLatin-1)�encodingrrzIThe database file is
missing, the semantics of the 'c' flag will be used.�)�
stacklevel�w)rr)
r
rr	�_os�remove�OSError�_ior�warnings�warn�DeprecationWarning�_chmod�close)rr�filename�frrrrr
Is


z_Database._createcCs�i|_ytj|jddd�}Wntk
r:|j|_YnPXd|_|�>x6|D].}|j�}tj	|�\}}|j
d�}||j|<qNWWdQRXdS)NrzLatin-1)rF)rrrr	rr�	_modified�rstrip�_astZliteral_eval�encode)rr$�line�key�pos_and_siz_pairrrrr_s

z_Database._updatecCs�|jdks|jrdSy|jj|j�Wntk
r<YnXy|jj|j|j�Wntk
rhYnX|jj	|jddd��F}|j
|j�x2|jj�D]$\}}d|jd�|f}|j
|�q�WWdQRXdS)NrzLatin-1)rz%r,
%r
)rr%r�unlinkrr�renamer	rrr!�items�decode�write)rr$r*r+�entryrrr�_commitqsz_Database._commitcCs|jdkrtd��dS)Nz"DBM
object has already been closed)rr)rrrr�_verify_open�s
z_Database._verify_openc	Cs\t|t�r|jd�}|j�|j|\}}tj|jd��}|j|�|j	|�}WdQRX|S)Nzutf-8�rb)
�
isinstance�strr(r3rrrr
�seek�read)rr*�pos�sizr$Zdatrrr�__getitem__�s


z_Database.__getitem__cCsrtj|jd��R}|jdd�t|j��}|tdtt}|jd||�|}|j|�WdQRX|t|�fS)Nzrb+r���)	rrr
r7�int�tell�
_BLOCKSIZEr0�len)r�valr$r9Znposrrr�_addval�sz_Database._addvalc
Cs:tj|jd��}|j|�|j|�WdQRX|t|�fS)Nzrb+)rrr
r7r0rB)rr9rCr$rrr�_setval�s
z_Database._setvalcCsP||j|<tj|jddd��*}|j|j�|jd|jd�|f�WdQRXdS)N�azLatin-1)rz%r,
%r
)rrrr	r!r0r/)rr*r+r$rrr�_addkey�s
z_Database._addkeycCs|jrddl}|jdtdd�t|t�r4|jd�}nt|ttf�sJt	d��t|t�r`|jd�}nt|ttf�svt	d��|j
�d|_||jkr�|j
||j|��n^|j|\}}|td	t}t|�td	t}||kr�|j||�|j|<n|j|�|j|<dS)
Nrz'The database is opened for reading onlyr<)rzutf-8zkeys
must be bytes or stringszvalues must be bytes or stringsTr=)rrrr
r5r6r(�bytes�	bytearray�	TypeErrorr3r%rrGrDrArBrE)rr*rCrr9r:Z	oldblocksZ	newblocksrrr�__setitem__�s,



z_Database.__setitem__cCsT|jrddl}|jdtdd�t|t�r2|jd�}|j�d|_|j	|=|j
�dS)Nrz'The database is opened for reading
onlyr<)rzutf-8T)rrrr
r5r6r(r3r%rr2)rr*rrrr�__delitem__�s


z_Database.__delitem__cCs.y
t|j�Stk
r(td�d�YnXdS)Nz"DBM object has already been
closed)�listrrJr)rrrr�keys�s
z_Database.keyscs
�j��fdd��jj�D�S)Ncsg|]}|�|f�qSrr)�.0r*)rrr�
<listcomp>�sz#_Database.items.<locals>.<listcomp>)r3rrN)rr)rrr.�sz_Database.itemscCsPt|t�r|jd�}y
||jkStk
rJ|jdkrDtd�d�n�YnXdS)Nzutf-8z"DBM object has
already been closed)r5r6r(rrJr)rr*rrr�__contains__�s



z_Database.__contains__cCs.y
t|j�Stk
r(td�d�YnXdS)Nz"DBM object has already been
closed)�iterrrJr)rrrr�iterkeyss
z_Database.iterkeyscCs.y
t|j�Stk
r(td�d�YnXdS)Nz"DBM object has already been
closed)rBrrJr)rrrr�__len__s
z_Database.__len__cCs,z|j�Wdd|_|_|_|_XdS)N)r2rr
r	r)rrrrr"sz_Database.closecCs
t|jd�r|jj||j�dS)N�chmod)�hasattrrrUr)r�filerrrr!sz_Database._chmodcCs|S)Nr)rrrr�	__enter__!sz_Database.__enter__cGs|j�dS)N)r")r�argsrrr�__exit__$sz_Database.__exit__N)r)�__name__�
__module__�__qualname__rrrr
rr2�syncr3r;rDrErGrKrLrNr.rQrS�__iter__rTr"�__del__r!rXrZrrrrr#s2

	'rr�c
Csfytjd�}tj|�Wntk
r,YnX||@}|dkrXddl}|jdtdd	�t|||d
�S)aEOpen the database file, filename, and return corresponding
object.

    The flag argument, used to control how the database is opened in the
    other DBM implementations, supports only the semantics of 'c'
and 'n'
    values.  Other values will default to the semantics of 'c'
value:
    the database will always opened for update and will be created if it
    does not exist.

    The optional mode argument is the UNIX mode of the file, used only when
    the database has to be created.  It defaults to octal code 0o666 (and
    will be modified by the prevailing umask).

    rrrrrNz)Flag must be one of 'r', 'w',
'c', or
'n'r<)r)r)rrrr)r�umask�AttributeErrorrrr
r)rWrrZumrrrrr(s


)rra)�__doc__Zastr'�ior�osr�collections�__all__rArr�MutableMappingrrrrrr�<module>s