<?php

/*
	[Discuz!] (C)2001-2007 Comsenz Inc.
	This is NOT a freeware, use is subject to license terms

	$RCSfile: db_mysql.class.php,v $
	$Revision: 1.27.2.3 $
	$Date: 2007/03/21 15:52:38 $
*/

if(!defined('IN_DISCUZ')) {
	exit('Access Denied');
}

class dbstuff {
	var $querynum = 0;
	var $link;
	function connect($dbhost, $dbuser, $dbpw, $dbname = '', $pconnect = 0) {
		if($pconnect) {
			if(!$this->link = @mysql_pconnect($dbhost, $dbuser, $dbpw)) {
				$this->halt('Can not connect to MySQL server');
			}
		} else {
			if(!$this->link = @mysql_connect($dbhost, $dbuser, $dbpw)) {
				$this->halt('Can not connect to MySQL server');
			}
		}

		if($this->version() > '4.1') {
			global $charset, $dbcharset;
			if(!$dbcharset && in_array(strtolower($charset), array('gbk', 'big5', 'utf-8'))) {
				$dbcharset = str_replace('-', '', $charset);
			}

			if($dbcharset) {
				mysql_query("SET character_set_connection=$dbcharset, character_set_results=$dbcharset, character_set_client=binary", $this->link);
			}

			if($this->version() > '5.0.1') {
				mysql_query("SET sql_mode=''", $this->link);
			}
		}

		if($dbname) {
			mysql_select_db($dbname, $this->link);
		}

	}

	function select_db($dbname) {
		return mysql_select_db($dbname, $this->link);
	}

	function fetch_array($query, $result_type = MYSQL_ASSOC) {
		return mysql_fetch_array($query, $result_type);
	}

	function query($sql, $type = '') {
		global $debug, $discuz_starttime, $sqldebug, $sqlspenttimes;

		$func = $type == 'UNBUFFERED' && @function_exists('mysql_unbuffered_query') ?
			'mysql_unbuffered_query' : 'mysql_query';
		if(!($query = $func($sql, $this->link)) && $type != 'SILENT') {
			$this->halt('MySQL Query Error', $sql);
		}


		$this->querynum++;
		return $query;
	}

	function affected_rows() {
		return mysql_affected_rows($this->link);
	}

	function error() {
		return (($this->link) ? mysql_error($this->link) : mysql_error());
	}

	function errno() {
		return intval(($this->link) ? mysql_errno($this->link) : mysql_errno());
	}

	function result($query, $row) {
		$query = @mysql_result($query, $row);
		return $query;
	}

	function num_rows($query) {
		$query = mysql_num_rows($query);
		return $query;
	}

	function num_fields($query) {
		return mysql_num_fields($query);
	}

	function free_result($query) {
		return mysql_free_result($query);
	}

	function insert_id() {
		return ($id = mysql_insert_id($this->link)) >= 0 ? $id : $this->result($this->query("SELECT last_insert_id()"), 0);
	}

	function fetch_row($query) {
		$query = mysql_fetch_row($query);
		return $query;
	}

	function fetch_fields($query) {
		return mysql_fetch_field($query);
	}

	function version() {
		return mysql_get_server_info($this->link);
	}

	function close() {
		return mysql_close($this->link);
	}

	function halt($message = '', $sql = '') {

		define('CACHE_FORBIDDEN', TRUE);
		require_once DISCUZ_ROOT.'./include/db_mysql_error.inc.php';
	}
}

?>