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gdbm: add higher level interface

db4
Dmitry Shubin 2010-06-13 06:10:10 +04:00
parent 1ed16f775c
commit 4378948e47
3 changed files with 89 additions and 1 deletions
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1
extra/gdbm/authors.txt Normal file
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@ -0,0 +1 @@
Dmitry Shubin

4
extra/gdbm/ffi/ffi.factor
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@ -38,7 +38,7 @@ TYPEDEF: _GDBM_FILE* GDBM_FILE
CALLBACK: void fatal_func_cb ;
FUNCTION: GDBM_FILE gdbm_open ( c-string name, int block_size, int read_write, int mode, fatal_func_cb fatal_func ) ;
FUNCTION: void gdbm_close ( GDBM_FILE dbf ) ;
FUNCTION-ALIAS: gdbm-close void gdbm_close ( GDBM_FILE dbf ) ;
FUNCTION: int gdbm_store ( GDBM_FILE dbf, datum key, datum content, int flag ) ;
FUNCTION: datum gdbm_fetch ( GDBM_FILE dbf, datum key ) ;
FUNCTION: int gdbm_delete ( GDBM_FILE dbf, datum key ) ;
@ -74,3 +74,5 @@ CONSTANT: GDBM_OPT_ILLEGAL 20
TYPEDEF: int gdbm_error
C-GLOBAL: gdbm_error gdbm_errno
FUNCTION: c-string gdbm_strerror ( gdbm_error errno ) ;

85
extra/gdbm/gdbm.factor Normal file
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! Copyright (C) 2010 Dmitry Shubin.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors alien.c-types alien.data alien.destructors
classes.struct combinators destructors gdbm.ffi io.backend kernel libc
literals math namespaces sequences serialize strings ;
IN: gdbm
: object>datum ( obj -- datum )
object>bytes [ malloc-byte-array &free ] [ length ] bi
datum <struct-boa> ;
: datum>object* ( datum -- obj ? )
[ dptr>> ] [ dsize>> ] bi over
[ memory>byte-array bytes>object t ] [ drop f ] if ;
SYMBOL: current-dbf
: dbf ( -- dbf ) current-dbf get ;
TUPLE: gdbm
{ name string }
{ block-size integer }
{ flags integer initial: $ GDBM_WRCREAT }
{ mode integer initial: OCT: 644 } ;
DESTRUCTOR: gdbm-close
ERROR: gdbm-error errno msg ;
: gdbm-throw ( -- * ) gdbm_errno dup gdbm_strerror gdbm-error ;
: check-error ( ret -- ) 0 = [ gdbm-throw ] unless ;
: gdbm-open ( gdbm -- dbf )
{
[ name>> normalize-path ]
[ block-size>> ] [ flags>> ] [ mode>> ]
} cleave f gdbm_open [ gdbm-throw ] unless* ;
: gdbm-store ( key content flag -- )
[
{ [ dbf ] [ object>datum ] [ object>datum ] [ ] } spread
gdbm_store check-error
] with-destructors ;
: gdbm-replace ( key content -- ) GDBM_REPLACE gdbm-store ;
: gdbm-insert ( key content -- ) GDBM_INSERT gdbm-store ;
: gdbm-fetch* ( key -- content ? )
[ dbf swap object>datum gdbm_fetch datum>object* ]
with-destructors ;
: gdbm-fetch ( key -- content/f ) gdbm-fetch* drop ;
: gdbm-delete ( key -- )
[ dbf swap object>datum gdbm_delete check-error ]
with-destructors ;
: gdbm-firstkey* ( -- key ? )
[ dbf gdbm_firstkey datum>object* ] with-destructors ;
: gdbm-firstkey ( -- key/f ) gdbm-firstkey* drop ;
: gdbm-nextkey* ( key -- key ? )
[ dbf swap object>datum gdbm_nextkey datum>object* ]
with-destructors ;
: gdbm-nextkey ( key -- key/f ) gdbm-nextkey* drop ;
: gdbm-reorganize ( -- ) dbf gdbm_reorganize check-error ;
: gdbm-sync ( -- ) dbf gdbm_sync ;
: gdbm-exists ( key -- ? )
[ dbf swap object>datum gdbm_exists c-bool> ]
with-destructors ;
! : gdbm-setopt ( option value size -- ret ) ;
: gdbm-fdesc ( -- desc ) dbf gdbm_fdesc ;
: with-gdbm ( gdbm quot -- )
[ gdbm-open &gdbm-close current-dbf set ] prepose curry
[ with-scope ] curry with-destructors ; inline