�
z fc @ sw d Z d d l Z d d l Z d d l Z d d l Z e j Z d Z e
Z d e j f d � � YZ
d d d � Z d S( s� 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')
i����Ni t _Databasec B s� e Z e Z e Z d d � Z d � Z d � Z e Z d � Z d � Z d � Z
d � Z d � Z d � Z
d
� Z d � Z d � Z d
� Z e Z d � Z d � Z e Z d � Z RS( t cc C s� | | _ | d k | _ | t j d | _ | t j d | _ | t j d | _ d | _ y t | j d � } Wn< t
k
r� t | j d � � } | j | j � Wd QXn X| j � | j
� d S( Nt rt dirt datt bakt w( t _modet _readonlyt _ost extsept _dirfilet _datfilet _bakfilet Nonet _indext _opent IOErrort _chmodt closet _update( t selft filebasenamet modet flagt f( ( s /usr/lib64/python2.7/dumbdbm.pyt __init__0 s
c C s� i | _ y t | j � } Wn t k
r< | j | _ nV Xt | _ | �D x< | D]4 } | j � } t j | � \ } } | | j | s �