-ν
ηΆ<c       sS   d  Z  d k Z d k Z e i Z d Z e Z d f  d     YZ	 e
 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')

Ni   s	   _Databasec      s   t  Z d   Z d   Z d   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 d   Z RS(   Nc    s‘   | |  _ | t i d |  _ | t i d |  _ | t i d |  _ y t	 |  i d  } Wn+ t j
 o t	 |  i d |  i  } n X| i   |  i   d  S(   Ns   dirs   dats   baks   rs   w(   s   modes   selfs   _modes   files   _oss   extseps   _dirfiles   _datfiles   _bakfiles   _opens   fs   IOErrors   closes   _update(   s   selfs   files   modes   f(    (    s   /usr/lib/python2.2/dumbdbm.pys   __init__# s    	
c    s   h  |  _ y t |  i  } Wn t j
 o ne XxV d oN | i   i   } | o Pn t	 |  \ } \ } } | | f |  i | <q5 W| i   d  S(   Ni   (   s   selfs   _indexs   _opens   _dirfiles   fs   IOErrors   readlines   rstrips   lines   evals   keys   poss   sizs   close(   s   selfs   sizs   keys   fs   lines   pos(    (    s   /usr/lib/python2.2/dumbdbm.pys   _update0 s    	  c    sΙ   y t  i |  i  Wn t  i j
 o n Xy t  i |  i |  i  Wn t  i j
 o n Xt |  i d |  i  } x@ |  i
 i   D]/ \ } \ } } | i d | | | f  q W| i   d  S(   Ns   ws   %s, (%s, %s)
(   s   _oss   unlinks   selfs   _bakfiles   errors   renames   _dirfiles   _opens   _modes   fs   _indexs   itemss   keys   poss   sizs   writes   close(   s   selfs   keys   fs   sizs   pos(    (    s   /usr/lib/python2.2/dumbdbm.pys   _commit> s         !c    sS   |  i | \ } } t |  i d  } | i |  | i	 |  } | i   | Sd  S(   Ns   rb(   s   selfs   _indexs   keys   poss   sizs   _opens   _datfiles   fs   seeks   reads   dats   close(   s   selfs   keys   dats   fs   sizs   pos(    (    s   /usr/lib/python2.2/dumbdbm.pys   __getitem__H s    
c    s   t  |  i d  } | i d d  t | i    } | t d t t } | i
 d | |  | } | i
 |  | i   | t |  f Sd  S(   Ns   rb+i    i   i   s    (   s   _opens   selfs   _datfiles   fs   seeks   ints   tells   poss
   _BLOCKSIZEs   nposs   writes   vals   closes   len(   s   selfs   vals   nposs   fs   pos(    (    s   /usr/lib/python2.2/dumbdbm.pys   _addvalP s    
c    sJ   t  |  i d  } | i |  | i |  | i   | t	 |  f Sd  S(   Ns   rb+(
   s   _opens   selfs   _datfiles   fs   seeks   poss   writes   vals   closes   len(   s   selfs   poss   vals   f(    (    s   /usr/lib/python2.2/dumbdbm.pys   _setval_ s
    
c    sb   | \ } } | | f |  i | <t |  i d |  i  } | i	 d | | | f  | i
   d  S(   Ns   as   %s, (%s, %s)
(   s   poss   sizs   selfs   _indexs   keys   _opens   _dirfiles   _modes   fs   writes   close(   s   selfs   keys   .4s   poss   sizs   f(    (    s   /usr/lib/python2.2/dumbdbm.pys   _addkeyf s   c    s&  t  |  t  d  j o t  |  j n o t d  n |  i i |  o/ |  i |  \ } } |  i
 | | | f  n’ |  i | \ } } | t d t } t |  t d t } | | j o/ |  i | |  \ } } | | f |  i | <n) |  i |  \ } } | | f |  i | <d  S(   Ns    s   keys and values must be stringsi   (   s   types   keys   vals	   TypeErrors   selfs   _indexs   has_keys   _addvals   poss   sizs   _addkeys
   _BLOCKSIZEs	   oldblockss   lens	   newblockss   _setval(   s   selfs   keys   vals   sizs   poss	   newblockss	   oldblocks(    (    s   /usr/lib/python2.2/dumbdbm.pys   __setitem__l s    1c    s   |  i | =|  i   d  S(   N(   s   selfs   _indexs   keys   _commit(   s   selfs   key(    (    s   /usr/lib/python2.2/dumbdbm.pys   __delitem__} s    
c    s   |  i i   Sd  S(   N(   s   selfs   _indexs   keys(   s   self(    (    s   /usr/lib/python2.2/dumbdbm.pys   keys s    c    s   |  i i |  Sd  S(   N(   s   selfs   _indexs   has_keys   key(   s   selfs   key(    (    s   /usr/lib/python2.2/dumbdbm.pys   has_key s    c    s   |  i i |  Sd  S(   N(   s   selfs   _indexs   has_keys   key(   s   selfs   key(    (    s   /usr/lib/python2.2/dumbdbm.pys   __contains__ s    c    s   |  i i   Sd  S(   N(   s   selfs   _indexs   iterkeys(   s   self(    (    s   /usr/lib/python2.2/dumbdbm.pys   iterkeys s    c    s   t  |  i  Sd  S(   N(   s   lens   selfs   _index(   s   self(    (    s   /usr/lib/python2.2/dumbdbm.pys   __len__ s    c    s.   |  i   t |  _ t |  _ |  _ |  _ d  S(   N(   s   selfs   _commits   Nones   _indexs   _datfiles   _dirfiles   _bakfile(   s   self(    (    s   /usr/lib/python2.2/dumbdbm.pys   close s    
	c    s"   |  i t j	 o |  i   n d  S(   N(   s   selfs   _indexs   Nones   _commit(   s   self(    (    s   /usr/lib/python2.2/dumbdbm.pys   __del__ s    (   s   __name__s
   __module__s   __init__s   _updates   _commits   __getitem__s   _addvals   _setvals   _addkeys   __setitem__s   __delitem__s   keyss   has_keys   __contains__s   iterkeyss   __iter__s   __len__s   closes   __del__(    (    (    s   /usr/lib/python2.2/dumbdbm.pys	   _Database! s"   			
												iΆ  c    s   t  |  |  Sd  S(   N(   s	   _Databases   files   mode(   s   files   flags   mode(    (    s   /usr/lib/python2.2/dumbdbm.pys   open s    (   s   __doc__s   oss   _oss   __builtin__s   opens   _opens
   _BLOCKSIZEs   IOErrors   errors	   _Databases   None(   s	   _Databases   __builtin__s   _oss   errors
   _BLOCKSIZEs   opens   _open(    (    s   /usr/lib/python2.2/dumbdbm.pys   ? s   			{