<?php

//
// +----------------------------------------------------------------------+
// | PHP version 4.0                                                      |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2001 The PHP Group                                |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.02 of the PHP license,      |
// | that is bundled with this package in the file LICENSE, and is        |
// | available at through the world-wide-web at                           |
// | http://www.php.net/license/2_02.txt.                                 |
// | If you did not receive a copy of the PHP license and are unable to   |
// | obtain it through the world-wide-web, please send a note to          |
// | license@php.net so we can mail you a copy immediately.               |
// +----------------------------------------------------------------------+
// | Authors: Stig Bakken <ssb@fast.no>                                   |
// |          Jan Dankert <phpdb@jandankert.de>                           |
// +----------------------------------------------------------------------+
//

/**
 * Datenbank-abhaengige Methoden fuer SQ-Lite-Datenbanken 
 * @author $Author: dankert $
 * @version $Revision: 1.5 $
 * @package openrat.database
 */
class DB_sqlite
{
    /**
     * Die SQ-Lite-Verbindung.
     *
     * @var Resource
     */
    var $connection;
    
    /**
     * Datenbank-Fehler.
     *
     * @var String
     */
    var $error;


    function connect( $conf )
    {
        $filename = $conf['filename'];

        if   ( $conf['persistent'] )
            $connect_function = 'sqlite_popen';
        else
            $connect_function = 'sqlite_open';
            
        if    ( ! function_exists($connect_function))
        {
            $this->error = 'Function does not exist: '.$connect_function.' SQlite is not available';
            return false;
        }
                
        $this->connection = @$connect_function($filename,0666,$error);

        if    ( !is_resource($this->connection) )
        {
            $this->error = 'Could not connect to sqlite-database: '.$error;
            return false;
        }
                
        return true;
    }



    function disconnect()
    {
        $ret = sqlite_close( $this->connection );
        $this->connection = null;
        return $ret;
    }



    function query($query)
    {
        $result = sqlite_query($this->connection,$query );

        if    ( ! $result )
        {
            $this->error = 'Database error: '.sqlite_error_string(sqlite_last_error($this->connection));
            return FALSE;
        }

        return $result;
    }
    
    /**
     * Startet eine Transaktion.
     */
    function start()
    {
        sqlite_query( $this->connection,'BEGIN TRANSACTION;');
    }


    /**
     * Beendet eine Transaktion.
     */
    function commit()
    {
        sqlite_query( $this->connection,'COMMIT;');
    }


    /**
     * Bricht eine Transaktion ab.
     */
    function rollback()
    {
        sqlite_query( $this->connection,'ROLLBACK;');
    }
    


    function fetchRow( $result, $rownum )
    {
        return sqlite_fetch_array( $result,SQLITE_ASSOC );
    }

 
    function freeResult($result)
    {
        return true;
    }
    
    
    function escape()
    {
        return 'sqlite_escape_string';
    }
}


?>