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gdbm: better exception handling

db4
Dmitry Shubin 2010-06-16 19:40:33 +04:00
parent 01a62e25eb
commit 77465c8755
2 changed files with 51 additions and 27 deletions
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22
extra/gdbm/ffi/ffi.factor
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@ -50,28 +50,6 @@ FUNCTION: int gdbm_exists ( GDBM_FILE dbf, datum key ) ;
FUNCTION: int gdbm_setopt ( GDBM_FILE dbf, int option, int* value, int size ) ;
FUNCTION: int gdbm_fdesc ( GDBM_FILE dbf ) ;
CONSTANT: GDBM_NO_ERROR 0
CONSTANT: GDBM_MALLOC_ERROR 1
CONSTANT: GDBM_BLOCK_SIZE_ERROR 2
CONSTANT: GDBM_FILE_OPEN_ERROR 3
CONSTANT: GDBM_FILE_WRITE_ERROR 4
CONSTANT: GDBM_FILE_SEEK_ERROR 5
CONSTANT: GDBM_FILE_READ_ERROR 6
CONSTANT: GDBM_BAD_MAGIC_NUMBER 7
CONSTANT: GDBM_EMPTY_DATABASE 8
CONSTANT: GDBM_CANT_BE_READER 9
CONSTANT: GDBM_CANT_BE_WRITER 10
CONSTANT: GDBM_READER_CANT_DELETE 11
CONSTANT: GDBM_READER_CANT_STORE 12
CONSTANT: GDBM_READER_CANT_REORGANIZE 13
CONSTANT: GDBM_UNKNOWN_UPDATE 14
CONSTANT: GDBM_ITEM_NOT_FOUND 15
CONSTANT: GDBM_REORGANIZE_FAILED 16
CONSTANT: GDBM_CANNOT_REPLACE 17
CONSTANT: GDBM_ILLEGAL_DATA 18
CONSTANT: GDBM_OPT_ALREADY_SET 19
CONSTANT: GDBM_OPT_ILLEGAL 20
TYPEDEF: int gdbm_error
C-GLOBAL: gdbm_error gdbm_errno

56
extra/gdbm/gdbm.factor
View File

@ -1,8 +1,8 @@
! 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 ;
USING: accessors alien.c-types alien.data alien.destructors assocs
biassocs classes.struct combinators destructors gdbm.ffi io.backend
kernel libc literals math namespaces sequences serialize strings ;
IN: gdbm
TUPLE: gdbm
@ -11,15 +11,59 @@ TUPLE: gdbm
{ flags integer initial: $ GDBM_WRCREAT }
{ mode integer initial: OCT: 644 } ;
ERROR: gdbm-error errno msg ;
SINGLETONS:
gdbm-no-error gdbm-malloc-error
gdbm-block-size-error gdbm-file-open-error
gdbm-file-write-error gdbm-file-seek-error
gdbm-file-read-error gdbm-bad-magic-number
gdbm-empty-database gdbm-cant-be-reader
gdbm-cant-be-writer gdbm-reader-cant-delete
gdbm-reader-cant-store gdbm-reader-cant-reorganize
gdbm-unknown-update gdbm-item-not-found
gdbm-reorganize-failed gdbm-cannot-replace
gdbm-illegal-data gdbm-option-already-set
gdbm-illegal-option ;
ERROR: gdbm-unknown-error error ;
<PRIVATE
: gdbm-throw ( -- * ) gdbm_errno dup gdbm_strerror gdbm-error ;
: error-table ( -- table )
{
{ 0 gdbm-no-error }
{ 1 gdbm-malloc-error }
{ 2 gdbm-block-size-error }
{ 3 gdbm-file-open-error }
{ 4 gdbm-file-write-error }
{ 5 gdbm-file-seek-error }
{ 6 gdbm-file-read-error }
{ 7 gdbm-bad-magic-number }
{ 8 gdbm-empty-database }
{ 9 gdbm-cant-be-reader }
{ 10 gdbm-cant-be-writer }
{ 11 gdbm-reader-cant-delete }
{ 12 gdbm-reader-cant-store }
{ 13 gdbm-reader-cant-reorganize }
{ 14 gdbm-unknown-update }
{ 15 gdbm-item-not-found }
{ 16 gdbm-reorganize-failed }
{ 17 gdbm-cannot-replace }
{ 18 gdbm-illegal-data }
{ 19 gdbm-option-already-set }
{ 20 gdbm-illegal-option }
} >biassoc ;
: error>code ( error -- code )
dup error-table value-at [ ] [ gdbm-unknown-error ] ?if ;
: code>error ( code -- error ) error-table at ;
: gdbm-throw ( -- * ) gdbm_errno code>error throw ;
: check-error ( ret -- ) 0 = [ gdbm-throw ] unless ;
SYMBOL: current-dbf
: dbf ( -- dbf ) current-dbf get ;
@ -49,6 +93,8 @@ DESTRUCTOR: gdbm-close
PRIVATE>
: gdbm-error-message ( error -- msg ) error>code gdbm_strerror ;
: gdbm-replace ( key content -- ) GDBM_REPLACE gdbm-store ;
: gdbm-insert ( key content -- ) GDBM_INSERT gdbm-store ;