<?php

/*
    [UCenter] (C)2001-2008 Comsenz Inc.
    This is NOT a freeware, use is subject to license terms

    $Id: db.class.php 12126 2008-01-11 09:40:32Z heyond $
*/


class db {
    var $querynum = 0;
    var $link;
    var $histories;
    var $time;
    var $tablepre;

    function connect($dbhost, $dbuser, $dbpw, $dbname = '', $dbcharset = '', $pconnect = 0, $tablepre='', $time = 0) {
        $this->time = $time;
        $this->tablepre = $tablepre;
        if($pconnect) {
            if(!$this->link = mysql_pconnect($dbhost, $dbuser, $dbpw)) {
                $this->halt('Can not connect to foreign DB server');
            }
        } else {
            if(!$this->link = mysql_connect($dbhost, $dbuser, $dbpw, 1)) {
                $this->halt('Can not connect to foreign DB server');
            }
        }

        if($this->version() > '4.1') {

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

    function result_first($sql) {
        $query = $this->query($sql);
        return $this->result($query, 0);
    }

    function fetch_first($sql) {
        $query = $this->query($sql);
        return $this->fetch_array($query);
    }

    function fetch_all($sql) {
        $arr = array();
        $query = $this->query($sql);
        while($data = $this->fetch_array($query)) {
            $arr[] = $data;
        }
        return $arr;
    }

    function cache_gc() {
        $this->query("DELETE FROM {$this->tablepre}sqlcaches WHERE expiry<$this->time");
    }

    function query($sql, $type = '', $cachetime = FALSE) {
        $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++;
        $this->histories[] = $sql;
        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 = '', $sql = '') {
        exit($message.'<br /><br />'.$sql.'<br /> '.mysql_error());
    }
}

?>