1 ! Copyright (C) 2010 Dmitry Shubin.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors alien.c-types alien.data alien.destructors
4 alien.enums alien.syntax classes.struct combinators destructors
5 gdbm.ffi io.backend kernel libc locals math namespaces sequences
9 ENUM: gdbm-role reader writer wrcreat newdb ;
13 { block-size integer }
14 { role initial: wrcreat }
17 { mode integer initial: OCT: 644 } ;
19 : <gdbm> ( -- gdbm ) gdbm new ;
33 gdbm-reader-cant-delete
34 gdbm-reader-cant-store
35 gdbm-reader-cant-reorganize
38 gdbm-reorganize-failed
41 gdbm-option-already-set
47 : gdbm-throw ( -- * ) gdbm_errno gdbm-error number>enum throw ;
49 : check-error ( ret -- ) 0 = [ gdbm-throw ] unless ;
53 : dbf ( -- dbf ) current-dbf get ;
55 : get-flag ( gdbm -- n )
56 [ role>> enum>number ]
57 [ sync>> GDBM_SYNC 0 ? ]
58 [ nolock>> GDBM_NOLOCK 0 ? ]
61 : gdbm-open ( gdbm -- dbf )
63 [ name>> normalize-path ]
64 [ block-size>> ] [ get-flag ] [ mode>> ]
65 } cleave f gdbm_open [ gdbm-throw ] unless* ;
67 DESTRUCTOR: gdbm-close
69 : object>datum ( obj -- datum )
70 object>bytes [ malloc-byte-array &free ] [ length ] bi
73 : datum>object* ( datum -- obj ? )
74 [ dptr>> ] [ dsize>> ] bi over
75 [ memory>byte-array bytes>object t ] [ drop f ] if ;
77 : gdbm-store ( key content flag -- )
79 { [ dbf ] [ object>datum ] [ object>datum ] [ ] } spread
80 gdbm_store check-error
83 :: (setopt) ( value option -- )
85 int heap-size dup malloc &free :> ( size ptr )
86 value ptr 0 int set-alien-value
87 dbf option ptr size gdbm_setopt check-error
90 : setopt ( value option -- )
91 [ GDBM_CACHESIZE = [ >c-bool ] unless ] keep (setopt) ;
96 : gdbm-info ( -- str ) gdbm_version ;
98 : gdbm-error-message ( error -- msg )
99 enum>number gdbm_strerror ;
101 : replace ( key content -- ) GDBM_REPLACE gdbm-store ;
102 : insert ( key content -- ) GDBM_INSERT gdbm-store ;
105 [ dbf swap object>datum gdbm_delete check-error ]
108 : fetch* ( key -- content ? )
109 [ dbf swap object>datum gdbm_fetch datum>object* ]
112 : first-key* ( -- key ? )
113 [ dbf gdbm_firstkey datum>object* ] with-destructors ;
115 : next-key* ( key -- next-key ? )
116 [ dbf swap object>datum gdbm_nextkey datum>object* ]
119 : fetch ( key -- content/f ) fetch* drop ;
120 : first-key ( -- key/f ) first-key* drop ;
121 : next-key ( key -- key/f ) next-key* drop ;
123 :: each-key ( ... quot: ( ... key -- ... ) -- ... )
125 [ [ next-key* ] [ quot keep ] do while ] when drop ; inline
127 : each-value ( ... quot: ( ... value -- ... ) -- ... )
128 [ fetch ] prepose each-key ; inline
130 : each-record ( ... quot: ( ... key value -- ... ) -- ... )
131 [ dup fetch ] prepose each-key ; inline
133 : reorganize ( -- ) dbf gdbm_reorganize check-error ;
135 : synchronize ( -- ) dbf gdbm_sync ;
137 : exists? ( key -- ? )
138 [ dbf swap object>datum gdbm_exists c-bool> ]
141 : set-cache-size ( size -- ) GDBM_CACHESIZE setopt ;
142 : set-sync-mode ( ? -- ) GDBM_SYNCMODE setopt ;
143 : set-block-pool ( ? -- ) GDBM_CENTFREE setopt ;
144 : set-block-merging ( ? -- ) GDBM_COALESCEBLKS setopt ;
146 : gdbm-file-descriptor ( -- desc ) dbf gdbm_fdesc ;
148 : with-gdbm ( gdbm quot -- )
149 [ gdbm-open &gdbm-close current-dbf set ] prepose curry
150 [ with-scope ] curry with-destructors ; inline
152 :: with-gdbm-role ( name role quot -- )
153 <gdbm> name >>name role >>role quot with-gdbm ; inline
155 : with-gdbm-reader ( name quot -- )
156 reader swap with-gdbm-role ; inline
158 : with-gdbm-writer ( name quot -- )
159 writer swap with-gdbm-role ; inline