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<?php
/**
* DBA-based CDB reader/writer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
/**
* Reader class which uses the DBA extension
*/
class CdbReaderDBA extends CdbReader {
public function __construct( $fileName ) {
$this->handle = dba_open( $fileName, 'r-', 'cdb' );
if ( !$this->handle ) {
throw new CdbException( 'Unable to open CDB file "' . $fileName . '"' );
}
}
public function close() {
if ( isset( $this->handle ) ) {
dba_close( $this->handle );
}
unset( $this->handle );
}
public function get( $key ) {
return dba_fetch( $key, $this->handle );
}
}
/**
* Writer class which uses the DBA extension
*/
class CdbWriterDBA extends CdbWriter {
public function __construct( $fileName ) {
$this->realFileName = $fileName;
$this->tmpFileName = $fileName . '.tmp.' . mt_rand( 0, 0x7fffffff );
$this->handle = dba_open( $this->tmpFileName, 'n', 'cdb_make' );
if ( !$this->handle ) {
throw new CdbException( 'Unable to open CDB file for write "' . $fileName . '"' );
}
}
public function set( $key, $value ) {
return dba_insert( $key, $value, $this->handle );
}
public function close() {
if ( isset( $this->handle ) ) {
dba_close( $this->handle );
}
if ( $this->isWindows() ) {
unlink( $this->realFileName );
}
if ( !rename( $this->tmpFileName, $this->realFileName ) ) {
throw new CdbException( 'Unable to move the new CDB file into place.' );
}
unset( $this->handle );
}
}
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