<?php
/***************************************************************************
 *                                 mysql.php 
 *                            -------------------
 *   begin                : Saturday, Feb 13, 2001
 *   copyright            : (C) 2001 The phpBB Group
 *   email                : support@phpbb.com
 *
 *   $Id$
 *
 ***************************************************************************/

/***************************************************************************
 *
 *   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.
 *
 ***************************************************************************/

if(!defined("SQL_LAYER")){

define("SQL_LAYER","mysql");

class sql_db {

   var $db_connect_id;
   var $query_result;
   var $row;

   //
   // Constructor
   //
   function sql_db($sqlserver, $sqluser, $sqlpassword, $database, $persistency=true){

      $this->persistency = $persistency;
      $this->user = $sqluser;
      $this->password = $sqlpassword;
      $this->host = $sqlserver;

      if($this->persistency){
         $this->db_connect_id = @mysql_pconnect($this->server, $this->user, $this->password);
      } else {
         $this->db_connect_id = @mysql_connect($this->server, $this->user, $this->password);
      }
      if($this->db_connect_id){
         if($database != ""){
            $this->dbname = $database;
            $dbselect = @mysql_select_db($this->dbname);
            if(!$dbselect){
               mysql_close($this->db_connect_id);
               $this->db_connect_id = $dbselect;
            }
         }
      }
      return $this->db_connect_id;
   }
   //
   // Other base methods
   //
   function sql_setdb($database){
      if($database != ""){
         $this->dbname = $database;
         $dbselect = @mysql_select_db($this->dbname);
         if(!$dbselect){
            sql_close();
            $this->db_connect_id = $dbselect;
         }
         return $this->db_connect_id;
      } else {
         return false;
      }
   }
   function sql_close(){
      if($this->db_connect_id){
         if($this->query_result){
            @mysql_free_result($this->query_result);
         }
         $result = @mysql_close($this->db_connect_id);
         return $result;
      } else {
         return false;
      }
   }

   //
   // Base query method
   //
   function sql_query($query=""){
      // Remove any pre-existing queries
      unset($this->query_result);
      if($query != ""){
         $this->query_result = @mysql_query($query, $this->db_connect_id);
      }
      if($this->query_result){
         unset($this->row[$this->query_result]);
         unset($this->rowset[$this->query_result]);
         return $this->query_result;
      } else {
         return false;
      }
   }
   //
   // Other query methods
   //
   function sql_numrows($query_id = 0){
      if(!$query_id)
         $query_id = $this->query_result;
      if($query_id){
         $result = @mysql_num_rows($query_id);
         return $result;
      } else {
         return false;
      }
   }
   function sql_numfields($query_id = 0){
      if(!$query_id)
         $query_id = $this->query_result;
      if($query_id){
         $result = @mysql_num_fields($query_id);
         return $result;
      } else {
         return false;
      }
   }
   function sql_fieldname($offset, $query_id = 0){
      if(!$query_id)
         $query_id = $this->query_result;
      if($query_id){
         $result = @mysql_field_name($query_id, $offset);
         return $result;
      } else {
         return false;
      }
   }
   function sql_fieldtype($offset, $query_id = 0){
      if(!$query_id)
         $query_id = $this->query_result;
      if($query_id){
         $result = @mysql_field_type($query_id, $offset);
         return $result;
      } else {
         return false;
      }
   }
   function sql_fetchrow($query_id = 0){
      if(!$query_id)
         $query_id = $this->query_result;
      if($query_id){
         $this->row[$query_id] = @mysql_fetch_array($query_id);
         return $this->row[$query_id];
      } else {
         return false;
      }
   }
   function sql_fetchrowset($query_id = 0){
      if(!$query_id)
         $query_id = $this->query_result;
      if($query_id){
         unset($this->rowset[$query_id]);
         unset($this->row[$query_id]);
         while($this->rowset[$query_id] = @mysql_fetch_array($query_id)){
            $result[] = $this->rowset[$query_id];
         }
         return $result;
      } else {
         return false;
      }
   }
   function sql_fetchfield($field, $rownum=-1, $query_id = 0) {
      if(!$query_id)
         $query_id = $this->query_result;
      if($query_id){
         if($rownum > -1){
            $result = @mysql_result($query_id, $rownum, $field);
         } else {
            if(empty($this->row[$query_id]) && empty($this->rowset[$query_id])){
               if($this->sql_fetchrow())
                  $result = $this->row[$query_id][$field];
            } else {
               if($this->rowset[$query_id]){
                  $result = $this->rowset[$query_id][$field];
               } else if($this->row[$query_id]){
                  $result = $this->row[$query_id][$field];
               }
            }
         }
         return $result;
      } else {
         return false;
      }
   }
   function sql_rowseek($rownum, $query_id = 0){
      if(!$query_id)
         $query_id = $this->query_result;
      if($query_id){
         $result = @mysql_data_seek($query_id, $rownum);
         return $result;
      } else {
         return false;
      }
   }
   function sql_nextid(){
      if($this->db_connection_id){
         $result = @mysql_insert_id();
         return $result;
      } else {
         return false;
      }
   }
   function sql_freeresult($query_id = 0){
      if(!$query_id)
         $query_id = $this->query_result;
      if($query_id){
         $result = @mysql_free_result($query_id);
         return $result;
      } else {
         return false;
      }
   }
   function sql_error($query_id = 0){
      if(!$query_id)
         $query_id = $this->query_result;
      $result[message] = @mysql_error($query_id);
      $result[code] = @mysql_errno($query_id);

      return $result;
   }

} // class sql_db

} // if ... define

?>