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dumb.cpython-312.pyc
CRhJ- ~ d Z ddlZddlZddlZddlZddgZ dZ e Z G d dej j Zd dZy) 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') Nerroropeni c e Zd ZeZeZddZd Zd Zd ZeZ d Z d Z d Z d Z d Zd Zd Zd Zd Zd Zd ZeZd Zd ZeZd Zd Zd Zy) _Databasec | j j | }|| _ |dk( | _ |dz | _ |dz | _ |dz | _ d | _ | j | | j | y )Nrs .dirs .dats .bak) _osfsencode_mode _readonly_dirfile_datfile_bakfile_index_create_update)self filebasenamemodeflags /usr/lib/python3.12/dbm/dumb.py__init__z_Database.__init__0 ss xx(( 6 #+ %w. %w. $w. T T c |dk( r>| j | j | j fD ] } t j | t j | j dd }|j y # t $ r Y Zw xY w# t $ r[ |dvr t j | j dd 5 }| j | j d d d Y y # 1 sw Y Y y xY ww xY w)Nnr Latin-1encodingcr w) r r r r removeOSError_ior close_chmod)r r filenamefs r r z_Database._createJ s 3; !]]DMM4== IJJx( J i@A GGI +:%$--yAQ DMM* BAA +s; A8"B 8 BB0C+7 C C+ C' "C+'C+c j d| _ i | _ t j | j dd }|5 |D ]J }|j }t j | \ }}|j d }|| j |< L d d d y # 1 sw Y y xY w# t $ r |dvr d| _ Y y w xY w)NFr r r r T) _modifiedr r$ r r rstrip_ast literal_evalencoder# )r r r( linekeypos_and_siz_pairs r r z_Database._update] s 8 i@A D ;;=D,0,=,=d,C)C) **Y/C'7DKK$ ":% !DN "s "B ABBB21B2c f | j | j sy | j j | j | j j | j | j | j j | j dd 5 }| j | j | j j D ]- \ }}|j d d|d}|j | / d d d y # t $ r Y w xY w# t $ r Y w xY w# 1 sw Y y xY w)Nr! r r , )r r* r unlinkr r# renamer r$ r r& itemsdecodewrite)r r( r0 r1 entrys r _commitz_Database._commitq s ;; dnn HHOODMM * HHOODMM4== 9 XX]]4==# ] Ba KK &)-):):)<%% '*jj&;=MN *= C B C Bs0 %D 0D A&D' DD D$#D$'D0c 2 | j t d y N"DBM object has already been closed)r r r s r _verify_openz_Database._verify_open s ;; <= = r c < t |t r|j d }| j | j | \ }}t j | j d 5 }|j | |j | }d d d |S # 1 sw Y S xY w)Nutf-8rb) isinstancestrr. r@ r r$ r r seekread)r r0 possizr( dats r __getitem__z_Database.__getitem__ s} c3 **W%C ;;s#S XXdmmT *a FF3K&&+C + + s $#BBc d t j | j d 5 }|j dd t |j }|t z dz t z t z }|j d||z z |}|j | d d d t | fS # 1 sw Y xY w)Nrb+r ) r$ r r rF inttell _BLOCKSIZEr9 len)r valr( rH nposs r _addvalz_Database._addval s XXdmmU +q FF1aLaffh-C:%)j8JFD GGE48$ %C GGCL , SX , +s A0B&&B/c t j | j d 5 }|j | |j | d d d |t | fS # 1 sw Y xY w)NrM )r$ r r rF r9 rT )r rH rU r( s r _setvalz_Database._setval sJ XXdmmU +q FF3K GGCL , SX , +s #AA"c || j |< t j | j dd 5 }| j | j |j |j d d|d d d d y # 1 sw Y y xY w)Nar r r3 r4 )r r$ r r r& r9 r8 )r r0 r1 r( s r _addkeyz_Database._addkey s] + C XXdmmS9 = KK & GG#**Y"79IJ K > = =s AA==Bc | j r t d t |t r|j d }n!t |t t f s t d t |t r|j d }n!t |t t f s t d | j d| _ || j vr"| j || j | y | j | \ }}|t z dz t z }t | t z dz t z }||k r | j || | j |< y | j | | j |< y )N'The database is opened for reading onlyrB z keys must be bytes or stringsz values must be bytes or stringsTrO )r r rD rE r. bytes bytearray TypeErrorr@ r* r r\ rW rS rT rY )r r0 rU rH rI oldblocks newblockss r __setitem__z_Database.__setitem__ s+ >>AB B c3 **W%CC%!34 ;< < c3 **W%CC%!34 => > dkk ! LLdll3 / 0 {{3'HC z)A-*<I SJ.2zAII%#'<<S#9 C $(<<#4 C r c | j r t d t |t r|j d }| j d| _ | j |= | j y )Nr^ rB T) r r rD rE r. r@ r* r r; r r0 s r __delitem__z_Database.__delitem__ sW >>AB B c3 **W%C KK r c ` t | j S # t $ r t d d w xY wr= )listr ra r r? s r keysz_Database.keys 6 H $ $ H<=4 G H -c | j | j j D cg c] }|| | f c}S c c}w N)r@ r rj rf s r r7 z_Database.items s> ,0KK,<,<,>?,>Sd3i ,>???s >c t |t r|j d } || j v S # t $ r | j t d d w xY w)NrB r> )rD rE r. r ra r rf s r __contains__z_Database.__contains__ sX c3 **W%C $++% % {{" @AtK s 1 #Ac ` t | j S # t $ r t d d w xY wr= )iterr ra r r? s r iterkeysz_Database.iterkeys rk rl c ` t | j S # t $ r t d d w xY wr= )rT r ra r r? s r __len__z_Database.__len__ s6 Ht{{# # H<=4 G Hrl c | j d x| _ x| _ x| _ | _ y # d x| _ x| _ x| _ | _ w xY wrn )r; r r r r r? s r r% z_Database.close sJ O LLNJN NDK N$- N$-$-$ NDK N$- N$-$-s / A c P | j j || j y rn )r chmodr )r files r r& z_Database._chmod s tTZZ(r c | S rn r? s r __enter__z_Database.__enter__ s r c $ | j y rn )r% )r argss r __exit__z_Database.__exit__ s r N)r ) __name__ __module__ __qualname__r r$ r r r r; syncr@ rK rW rY r\ rd rg rj r7 rp rs __iter__ru r% __del__r& r| r r{ r r r r # s C C4&8( 2 D> L 5J H @ H HH O G)r r c t j d }t j | || z }|dvr t d t | || S # t $ r Y (w xY w)aE Open 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). r )r r! r r z)Flag must be one of 'r', 'w', 'c', or 'n')r )r umaskAttributeError ValueErrorr )ry r r ums r r r # sd YYq\ " s| ''DEE T4d ++ s *A AA)r i )__doc__astr, ior$ osr collections.abc collections__all__rS r# r abcMutableMappingr r r{ r r <module>r sJ . F } .. }@,r