mirror of https://github.com/BOINC/boinc.git
252 lines
7.9 KiB
PHP
252 lines
7.9 KiB
PHP
<?php
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// This file is part of BOINC.
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// http://boinc.berkeley.edu
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// Copyright (C) 2008 University of California
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//
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// BOINC is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License
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// as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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//
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// BOINC is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
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// Should not be enabled for public code
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//ini_set('display_errors', 'stdout');
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//error_reporting(E_ALL);
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/// represents a connection to a database.
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// Intended to be subclassed (e.g., BoincDb, BossaDb)
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if (class_exists("mysqli")) {
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define("MYSQLI", true);
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} else {
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define("MYSQLI", false);
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}
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class DbConn {
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var $db_conn;
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var $db_name;
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function init_conn($user, $passwd, $host, $name) {
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if (MYSQLI) {
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if (version_compare(PHP_VERSION, '5.3.0') < 0) {
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$this->db_conn = new mysqli($host, $user, $passwd);
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} else {
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$this->db_conn = new mysqli("p:".$host, $user, $passwd);
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}
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} else {
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$this->db_conn = mysql_pconnect($host, $user, $passwd);
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}
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if (!$this->db_conn) {
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return false;
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}
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$this->db_name = $name;
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return true;
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}
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// in keeping with PHP/MySQL convention, return true (nonzero) on success.
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// (This is the opposite of the BOINC convention)
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//
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function do_query($q) {
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global $generating_xml;
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$q = str_replace('DBNAME', $this->db_name, $q);
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//echo "query: $q<br>\n";
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if (MYSQLI) {
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$ret = $this->db_conn->query($q);
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} else {
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$ret = mysql_query($q, $this->db_conn);
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}
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if (!$ret) {
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if (!$generating_xml) {
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echo "Database Error<br>\n";
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}
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//echo ": ", $this->base_error(), "\n<pre>";
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//var_dump(debug_backtrace());
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//echo "</pre>query: $q\n";
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return null;
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}
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return $ret;
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}
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// # rows affected by last query
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//
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function affected_rows() {
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if (MYSQLI) {
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$this->db_conn->affected_rows;
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} else {
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return mysql_affected_rows($this->db_conn);
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}
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}
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function lookup_fields($table, $classname, $fields, $clause) {
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$query = "select $fields from DBNAME.$table where $clause";
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$result = $this->do_query($query);
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if (!$result) {
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return null;
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}
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if (MYSQLI) {
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$obj = $result->fetch_object($classname);
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$result->free();
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} else {
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$obj = mysql_fetch_object($result, $classname);
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mysql_free_result($result);
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}
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return $obj;
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}
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function lookup($table, $classname, $clause) {
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return $this->lookup_fields($table, $classname, "*", $clause);
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}
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function lookup_id($id, $table, $classname) {
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return $this->lookup($table, $classname, "id=$id");
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}
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function enum_general($classname, $query) {
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$result = $this->do_query($query);
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if (!$result) return null;
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$x = array();
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if (MYSQLI) {
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while ($obj = $result->fetch_object($classname)) {
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$x[] = $obj;
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}
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$result->free();
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} else {
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while ($obj = mysql_fetch_object($result, $classname)) {
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$x[] = $obj;
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}
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mysql_free_result($result);
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}
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return $x;
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}
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function enum_fields(
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$table, $classname, $fields, $where_clause, $order_clause
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) {
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$x = array();
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if ($where_clause) {
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$where_clause = "where $where_clause";
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}
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$query = "select $fields from DBNAME.$table $where_clause $order_clause";
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return $this->enum_general($classname,$query);
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}
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function enum($table, $classname, $where_clause=null, $order_clause=null) {
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return self::enum_fields(
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$table, $classname, '*', $where_clause, $order_clause
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);
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}
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function update($obj, $table, $clause) {
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$query = "update DBNAME.$table set $clause where id=$obj->id";
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return $this->do_query($query);
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}
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function update_aux($table, $clause) {
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$query = "update DBNAME.$table set $clause";
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return $this->do_query($query);
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}
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function insert($table, $clause) {
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$query = "insert into DBNAME.$table $clause";
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return $this->do_query($query);
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}
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function delete($obj, $table) {
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$query = "delete from DBNAME.$table where id=$obj->id";
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return $this->do_query($query);
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}
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function delete_aux($table, $clause) {
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$query = "delete from DBNAME.$table where $clause";
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return $this->do_query($query);
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}
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function insert_id() {
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if (MYSQLI) {
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return $this->db_conn->insert_id;
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} else {
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return mysql_insert_id($this->db_conn);
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}
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}
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function get_int($query, $field) {
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$result = $this->do_query($query);
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if (!$result) error_page("database error on query $query");
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if (MYSQLI) {
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$x = $result->fetch_object("StdClass");
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$result->free();
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} else {
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$x = mysql_fetch_object($result);
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mysql_free_result($result);
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}
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if ($x) return $x->$field;
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return false;
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}
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function get_double($query, $field) {
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$result = $this->do_query($query);
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if (!$result) error_page("database error on query $query");
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if (MYSQLI) {
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$x = $result->fetch_object("StdClass");
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$result->free();
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} else {
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$x = mysql_fetch_object($result);
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mysql_free_result($result);
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}
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if ($x) return (double)$x->$field;
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return false;
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}
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function count($table, $clause="TRUE") {
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$query = "select count(*) as total from DBNAME.$table where $clause";
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return $this->get_int($query, 'total');
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}
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function sum($table, $field, $clause="") {
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$query = "select sum($field) as total from DBNAME.$table $clause";
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return $this->get_double($query, 'total');
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}
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function max($table, $field, $clause="") {
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$query = "select max($field) as total from DBNAME.$table $clause";
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return $this->get_double($query, 'total');
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}
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function percentile($table, $field, $clause, $pct) {
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$n = $this->count($table, $clause);
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if (!$n) return false;
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$m = (int)($n*$pct/100);
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$query = "select $field from DBNAME.$table where $clause order by $field limit $m,1";
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return $this->get_double($query, $field);
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}
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function replace($table, $clause) {
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$query = "replace into DBNAME.$table set $clause";
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return $this->do_query($query);
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}
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function base_escape_string($string) {
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if (MYSQLI) {
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return $this->db_conn->escape_string($string);
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} else {
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return mysql_real_escape_string($string);
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}
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}
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function base_error() {
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if (MYSQLI) {
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return $this->db_conn->error;
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} else {
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return mysql_error($this->db_conn);
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}
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}
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function table_exists($table_name) {
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$result = $this->do_query("show tables from DBNAME like '$table_name'");
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if (!$result) error_page("database error on query $query");
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if (MYSQLI) {
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$t = $result->fetch_array();
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$result->free();
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} else {
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$t = mysql_fetch_array($result);
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mysql_free_result($result);
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}
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if ($t[0] == "$table_name") return true;
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return false;
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}
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}
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?>
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