--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/punbb/include/dblayer/sqlite.php Sun Apr 06 00:28:50 2008 -0400
@@ -0,0 +1,354 @@
+<?php
+/***********************************************************************
+
+ Copyright (C) 2002-2008 PunBB.org
+
+ This file is part of PunBB.
+
+ PunBB 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.
+
+ PunBB is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ MA 02111-1307 USA
+
+************************************************************************/
+
+
+// Make sure we have built in support for SQLite
+if (!function_exists('sqlite_open'))
+ exit('This PHP environment doesn\'t have SQLite support built in. SQLite support is required if you want to use a SQLite database to run this forum. Consult the PHP documentation for further assistance.');
+
+
+class DBLayer
+{
+ var $prefix;
+ var $link_id;
+ var $query_result;
+ var $in_transaction = 0;
+
+ var $saved_queries = array();
+ var $num_queries = 0;
+
+ var $error_no = false;
+ var $error_msg = 'Unknown';
+
+
+ function DBLayer($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect)
+ {
+ // Prepend $db_name with the path to the forum root directory
+ $db_name = PUN_ROOT.$db_name;
+
+ $this->prefix = $db_prefix;
+
+ if (!file_exists($db_name))
+ {
+ @touch($db_name);
+ @chmod($db_name, 0666);
+ if (!file_exists($db_name))
+ error('Unable to create new database \''.$db_name.'\'. Permission denied.', __FILE__, __LINE__);
+ }
+
+ if (!is_readable($db_name))
+ error('Unable to open database \''.$db_name.'\' for reading. Permission denied.', __FILE__, __LINE__);
+
+ if (!is_writable($db_name))
+ error('Unable to open database \''.$db_name.'\' for writing. Permission denied.', __FILE__, __LINE__);
+
+ if ($p_connect)
+ $this->link_id = @sqlite_popen($db_name, 0666, $sqlite_error);
+ else
+ $this->link_id = @sqlite_open($db_name, 0666, $sqlite_error);
+
+ if (!$this->link_id)
+ error('Unable to open database \''.$db_name.'\'. SQLite reported: '.$sqlite_error, __FILE__, __LINE__);
+ else
+ return $this->link_id;
+ }
+
+
+ function start_transaction()
+ {
+ ++$this->in_transaction;
+
+ return (@sqlite_query($this->link_id, 'BEGIN')) ? true : false;
+ }
+
+
+ function end_transaction()
+ {
+ --$this->in_transaction;
+
+ if (@sqlite_query($this->link_id, 'COMMIT'))
+ return true;
+ else
+ {
+ @sqlite_query($this->link_id, 'ROLLBACK');
+ return false;
+ }
+ }
+
+
+ function query($sql, $unbuffered = false)
+ {
+ if (strlen($sql) > 140000)
+ exit('Insane query. Aborting.');
+
+ if (defined('PUN_SHOW_QUERIES'))
+ $q_start = get_microtime();
+
+ if ($unbuffered)
+ $this->query_result = @sqlite_unbuffered_query($this->link_id, $sql);
+ else
+ $this->query_result = @sqlite_query($this->link_id, $sql);
+
+ if ($this->query_result)
+ {
+ if (defined('PUN_SHOW_QUERIES'))
+ $this->saved_queries[] = array($sql, sprintf('%.5f', get_microtime() - $q_start));
+
+ ++$this->num_queries;
+
+ return $this->query_result;
+ }
+ else
+ {
+ if (defined('PUN_SHOW_QUERIES'))
+ $this->saved_queries[] = array($sql, 0);
+
+ $this->error_no = @sqlite_last_error($this->link_id);
+ $this->error_msg = @sqlite_error_string($this->error_no);
+
+ if ($this->in_transaction)
+ @sqlite_query($this->link_id, 'ROLLBACK');
+
+ --$this->in_transaction;
+
+ return false;
+ }
+ }
+
+
+ function query_build($query, $unbuffered = false)
+ {
+ $sql = '';
+
+ if (isset($query['SELECT']))
+ {
+ $sql = 'SELECT '.$query['SELECT'].' FROM '.(isset($query['PARAMS']['NO_PREFIX']) ? '' : $this->prefix).$query['FROM'];
+
+ if (isset($query['JOINS']))
+ {
+ foreach ($query['JOINS'] as $cur_join)
+ $sql .= ' '.key($cur_join).' '.(isset($query['PARAMS']['NO_PREFIX']) ? '' : $this->prefix).current($cur_join).' ON '.$cur_join['ON'];
+ }
+
+ if (!empty($query['WHERE']))
+ $sql .= ' WHERE '.$query['WHERE'];
+ if (!empty($query['GROUP BY']))
+ $sql .= ' GROUP BY '.$query['GROUP BY'];
+ if (!empty($query['HAVING']))
+ $sql .= ' HAVING '.$query['HAVING'];
+ if (!empty($query['ORDER BY']))
+ $sql .= ' ORDER BY '.$query['ORDER BY'];
+ if (!empty($query['LIMIT']))
+ $sql .= ' LIMIT '.$query['LIMIT'];
+ }
+ else if (isset($query['INSERT']))
+ {
+ $sql = 'INSERT INTO '.(isset($query['PARAMS']['NO_PREFIX']) ? '' : $this->prefix).$query['INTO'];
+
+ if (!empty($query['INSERT']))
+ $sql .= ' ('.$query['INSERT'].')';
+
+ $sql .= ' VALUES('.$query['VALUES'].')';
+ }
+ else if (isset($query['UPDATE']))
+ {
+ $query['UPDATE'] = (isset($query['PARAMS']['NO_PREFIX']) ? '' : $this->prefix).$query['UPDATE'];
+
+ $sql = 'UPDATE '.$query['UPDATE'].' SET '.$query['SET'];
+
+ if (!empty($query['WHERE']))
+ $sql .= ' WHERE '.$query['WHERE'];
+ }
+ else if (isset($query['DELETE']))
+ {
+ $sql = 'DELETE FROM '.(isset($query['PARAMS']['NO_PREFIX']) ? '' : $this->prefix).$query['DELETE'];
+
+ if (!empty($query['WHERE']))
+ $sql .= ' WHERE '.$query['WHERE'];
+ }
+
+ return $this->query($sql, $unbuffered);
+ }
+
+
+ function result($query_id = 0, $row = 0)
+ {
+ if ($query_id)
+ {
+ if ($row != 0)
+ @sqlite_seek($query_id, $row);
+
+ return @current(@sqlite_current($query_id));
+ }
+ else
+ return false;
+ }
+
+
+ function fetch_assoc($query_id = 0)
+ {
+ if ($query_id)
+ {
+ $cur_row = @sqlite_fetch_array($query_id, SQLITE_ASSOC);
+ if ($cur_row)
+ {
+ // Horrible hack to get rid of table names and table aliases from the array keys
+ while (list($key, $value) = @each($cur_row))
+ {
+ $dot_spot = strpos($key, '.');
+ if ($dot_spot !== false)
+ {
+ unset($cur_row[$key]);
+ $key = substr($key, $dot_spot+1);
+ $cur_row[$key] = $value;
+ }
+ }
+ }
+
+ return $cur_row;
+ }
+ else
+ return false;
+ }
+
+
+ function fetch_row($query_id = 0)
+ {
+ return ($query_id) ? @sqlite_fetch_array($query_id, SQLITE_NUM) : false;
+ }
+
+
+ function num_rows($query_id = 0)
+ {
+ return ($query_id) ? @sqlite_num_rows($query_id) : false;
+ }
+
+
+ function affected_rows()
+ {
+ return ($this->query_result) ? @sqlite_changes($this->query_result) : false;
+ }
+
+
+ function insert_id()
+ {
+ return ($this->link_id) ? @sqlite_last_insert_rowid($this->link_id) : false;
+ }
+
+
+ function get_num_queries()
+ {
+ return $this->num_queries;
+ }
+
+
+ function get_saved_queries()
+ {
+ return $this->saved_queries;
+ }
+
+
+ function free_result($query_id = false)
+ {
+ return true;
+ }
+
+
+ function escape($str)
+ {
+ return is_array($str) ? '' : sqlite_escape_string($str);
+ }
+
+
+ function error()
+ {
+ $result['error_sql'] = @current(@end($this->saved_queries));
+ $result['error_no'] = $this->error_no;
+ $result['error_msg'] = $this->error_msg;
+
+ return $result;
+ }
+
+
+ function close()
+ {
+ if ($this->link_id)
+ {
+ if ($this->in_transaction)
+ {
+ if (defined('PUN_SHOW_QUERIES'))
+ $this->saved_queries[] = array('COMMIT', 0);
+
+ @sqlite_query($this->link_id, 'COMMIT');
+ }
+
+ return @sqlite_close($this->link_id);
+ }
+ else
+ return false;
+ }
+
+
+ function table_exists($table_name)
+ {
+ $result = $this->query('SELECT 1 FROM sqlite_master WHERE name = \''.$this->escape($table_name).'\' AND type=\'table\'');
+ return $this->num_rows($result) > 0;
+ }
+
+
+ function field_exists($table_name, $field_name)
+ {
+ $result = $this->query('SELECT sql FROM sqlite_master WHERE name = \''.$this->escape($table_name).'\' AND type=\'table\'');
+ if (!$this->num_rows($result))
+ return false;
+
+ return preg_match('/[\r\n]'.preg_quote($field_name).' /', $this->result($result));
+ }
+
+
+ function index_exists($table_name, $index_name)
+ {
+ $result = $this->query('SELECT 1 FROM sqlite_master WHERE tbl_name = \''.$this->escape($table_name).'\' AND name = \''.$this->escape($index_name).'\' AND type=\'index\'');
+ return $this->num_rows($result) > 0;
+ }
+
+
+ function add_field($table_name, $field_name, $field_type, $allow_null, $default_value = null, $after_field = null)
+ {
+ if ($this->field_exists($table_name, $field_name))
+ return;
+
+ if ($default_value !== null && !is_int($default_value) && !is_float($default_value))
+ $default_value = '\''.$this->escape($default_value).'\'';
+
+ $this->query('ALTER TABLE '.$table_name.' ADD '.$field_name.' '.$field_type.($allow_null ? ' ' : ' NOT NULL').($default_value !== null ? ' DEFAULT '.$default_value : ' ')) or error(__FILE__, __LINE__);
+ }
+
+
+ function drop_field($table_name, $field_name)
+ {
+ // No DROP column in SQLite
+ return;
+ }
+}