-<?php

-/**

-*

-* This file is part of the phpBB Forum Software package.

-*

-* @copyright (c) phpBB Limited <https://www.phpbb.com>

-* @license GNU General Public License, version 2 (GPL-2.0)

-*

-* For full copyright and license information, please see

-* the docs/CREDITS.txt file.

-*

-*/

-

-namespace phpbb\db\driver;

-

-/**

-* Firebird/Interbase Database Abstraction Layer

-* Minimum Requirement is Firebird 2.1

-*/

-class firebird extends \phpbb\db\driver\driver

-{

- var $last_query_text = '';

- var $service_handle = false;

- var $affected_rows = 0;

- var $connect_error = '';

-

- /**

- * {@inheritDoc}

- */

- function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)

- {

- $this->persistency = $persistency;

- $this->user = $sqluser;

- $this->server = $sqlserver . (($port) ? ':' . $port : '');

- $this->dbname = str_replace('\\', '/', $database);

-

- // There are three possibilities to connect to an interbase db

- if (!$this->server)

- {

- $use_database = $this->dbname;

- }

- else if (strpos($this->server, '//') === 0)

- {

- $use_database = $this->server . $this->dbname;

- }

- else

- {

- $use_database = $this->server . ':' . $this->dbname;

- }

-

- if ($this->persistency)

- {

- if (!function_exists('ibase_pconnect'))

- {

- $this->connect_error = 'ibase_pconnect function does not exist, is interbase extension installed?';

- return $this->sql_error('');

- }

- $this->db_connect_id = @ibase_pconnect($use_database, $this->user, $sqlpassword, false, false, 3);

- }

- else

- {

- if (!function_exists('ibase_connect'))

- {

- $this->connect_error = 'ibase_connect function does not exist, is interbase extension installed?';

- return $this->sql_error('');

- }

- $this->db_connect_id = @ibase_connect($use_database, $this->user, $sqlpassword, false, false, 3);

- }

-

- // Do not call ibase_service_attach if connection failed,

- // otherwise error message from ibase_(p)connect call will be clobbered.

- if ($this->db_connect_id && function_exists('ibase_service_attach') && $this->server)

- {

- $this->service_handle = @ibase_service_attach($this->server, $this->user, $sqlpassword);

- }

- else

- {

- $this->service_handle = false;

- }

-

- return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');

- }

-

- /**

- * {@inheritDoc}

- */

- function sql_server_info($raw = false, $use_cache = true)

- {

- /**

- * force $use_cache false. I didn't research why the caching code there is no caching code

- * but I assume its because the IB extension provides a direct method to access it

- * without a query.

- */

-

- $use_cache = false;

-

- if ($this->service_handle !== false && function_exists('ibase_server_info'))

- {

- return @ibase_server_info($this->service_handle, IBASE_SVC_SERVER_VERSION);

- }

-

- return ($raw) ? '2.1' : 'Firebird/Interbase';

- }

-

- /**

- * SQL Transaction

- * @access private

- */

- function _sql_transaction($status = 'begin')

- {

- switch ($status)

- {

- case 'begin':

- return true;

- break;

-

- case 'commit':

- return @ibase_commit();

- break;

-

- case 'rollback':

- return @ibase_rollback();

- break;

- }

-

- return true;

- }

-

- /**

- * {@inheritDoc}

- */

- function sql_query($query = '', $cache_ttl = 0)

- {

- if ($query != '')

- {

- global $cache;

-

- // EXPLAIN only in extra debug mode

- if (defined('DEBUG'))

- {

- $this->sql_report('start', $query);

- }

- else if (defined('PHPBB_DISPLAY_LOAD_TIME'))

- {

- $this->curtime = microtime(true);

- }

-

- $this->last_query_text = $query;

- $this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;

- $this->sql_add_num_queries($this->query_result);

-

- if ($this->query_result === false)

- {

- $array = array();

- // We overcome Firebird's 32767 char limit by binding vars

- if (strlen($query) > 32767)

- {

- if (preg_match('/^(INSERT INTO[^(]++)\\(([^()]+)\\) VALUES[^(]++\\((.*?)\\)$/s', $query, $regs))

- {

- if (strlen($regs[3]) > 32767)

- {

- preg_match_all('/\'(?:[^\']++|\'\')*+\'|[\d-.]+/', $regs[3], $vals, PREG_PATTERN_ORDER);

-

- $inserts = $vals[0];

- unset($vals);

-

- foreach ($inserts as $key => $value)

- {

- if (!empty($value) && $value[0] === "'" && strlen($value) > 32769) // check to see if this thing is greater than the max + 'x2

- {

- $inserts[$key] = '?';

- $array[] = str_replace("''", "'", substr($value, 1, -1));

- }

- }

-

- $query = $regs[1] . '(' . $regs[2] . ') VALUES (' . implode(', ', $inserts) . ')';

- }

- }

- else if (preg_match('/^(UPDATE ([\\w_]++)\\s+SET )([\\w_]++\\s*=\\s*(?:\'(?:[^\']++|\'\')*+\'|\\d+)(?:,\\s*[\\w_]++\\s*=\\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]+))*+)\\s+(WHERE.*)$/s', $query, $data))

- {

- if (strlen($data[3]) > 32767)

- {

- $update = $data[1];

- $where = $data[4];

- preg_match_all('/(\\w++)\\s*=\\s*(\'(?:[^\']++|\'\')*+\'|[\d-.]++)/', $data[3], $temp, PREG_SET_ORDER);

- unset($data);

-

- $cols = array();

- foreach ($temp as $value)

- {

- if (!empty($value[2]) && $value[2][0] === "'" && strlen($value[2]) > 32769) // check to see if this thing is greater than the max + 'x2

- {

- $array[] = str_replace("''", "'", substr($value[2], 1, -1));

- $cols[] = $value[1] . '=?';

- }

- else

- {

- $cols[] = $value[1] . '=' . $value[2];

- }

- }

-

- $query = $update . implode(', ', $cols) . ' ' . $where;

- unset($cols);

- }

- }

- }

-

- if (!function_exists('ibase_affected_rows') && (preg_match('/^UPDATE ([\w_]++)\s+SET [\w_]++\s*=\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]+)(?:,\s*[\w_]++\s*=\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]+))*+\s+(WHERE.*)?$/s', $query, $regs) || preg_match('/^DELETE FROM ([\w_]++)\s*(WHERE\s*.*)?$/s', $query, $regs)))

- {

- $affected_sql = 'SELECT COUNT(*) as num_rows_affected FROM ' . $regs[1];

- if (!empty($regs[2]))

- {

- $affected_sql .= ' ' . $regs[2];

- }

-

- if (!($temp_q_id = @ibase_query($this->db_connect_id, $affected_sql)))

- {

- return false;

- }

-

- $temp_result = @ibase_fetch_assoc($temp_q_id);

- @ibase_free_result($temp_q_id);

-

- $this->affected_rows = ($temp_result) ? $temp_result['NUM_ROWS_AFFECTED'] : false;

- }

-

- if (sizeof($array))

- {

- $p_query = @ibase_prepare($this->db_connect_id, $query);

- array_unshift($array, $p_query);

- $this->query_result = call_user_func_array('ibase_execute', $array);

- unset($array);

-

- if ($this->query_result === false)

- {

- $this->sql_error($query);

- }

- }

- else if (($this->query_result = @ibase_query($this->db_connect_id, $query)) === false)

- {

- $this->sql_error($query);

- }

-

- if (defined('DEBUG'))

- {

- $this->sql_report('stop', $query);

- }

- else if (defined('PHPBB_DISPLAY_LOAD_TIME'))

- {

- $this->sql_time += microtime(true) - $this->curtime;

- }

-

- if (!$this->transaction)

- {

- if (function_exists('ibase_commit_ret'))

- {

- @ibase_commit_ret();

- }

- else

- {

- // way cooler than ibase_commit_ret :D

- @ibase_query('COMMIT RETAIN;');

- }

- }

-

- if ($cache && $cache_ttl)

- {

- $this->open_queries[(int) $this->query_result] = $this->query_result;

- $this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);

- }

- else if (strpos($query, 'SELECT') === 0 && $this->query_result)

- {

- $this->open_queries[(int) $this->query_result] = $this->query_result;

- }

- }

- else if (defined('DEBUG'))

- {

- $this->sql_report('fromcache', $query);

- }

- }

- else

- {

- return false;

- }

-

- return $this->query_result;

- }

-

- /**

- * Build LIMIT query

- */

- function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)

- {

- $this->query_result = false;

-

- $query = 'SELECT FIRST ' . $total . ((!empty($offset)) ? ' SKIP ' . $offset : '') . substr($query, 6);

-

- return $this->sql_query($query, $cache_ttl);

- }

-

- /**

- * {@inheritDoc}

- */

- function sql_affectedrows()

- {

- // PHP 5+ function

- if (function_exists('ibase_affected_rows'))

- {

- return ($this->db_connect_id) ? @ibase_affected_rows($this->db_connect_id) : false;

- }

- else

- {

- return $this->affected_rows;

- }

- }

-

- /**

- * {@inheritDoc}

- */

- function sql_fetchrow($query_id = false)

- {

- global $cache;

-

- if ($query_id === false)

- {

- $query_id = $this->query_result;

- }

-

- if ($cache && $cache->sql_exists($query_id))

- {

- return $cache->sql_fetchrow($query_id);

- }

-

- if ($query_id === false)

- {

- return false;

- }

-

- $row = array();

- $cur_row = @ibase_fetch_object($query_id, IBASE_TEXT);

-

- if (!$cur_row)

- {

- return false;

- }

-

- foreach (get_object_vars($cur_row) as $key => $value)

- {

- $row[strtolower($key)] = (is_string($value)) ? trim(str_replace(array("\\0", "\\n"), array("\0", "\n"), $value)) : $value;

- }

-

- return (sizeof($row)) ? $row : false;

- }

-

- /**

- * {@inheritDoc}

- */

- function sql_nextid()

- {

- $query_id = $this->query_result;

-

- if ($query_id !== false && $this->last_query_text != '')

- {

- if ($this->query_result && preg_match('#^INSERT[\t\n ]+INTO[\t\n ]+([a-z0-9\_\-]+)#i', $this->last_query_text, $tablename))

- {

- $sql = 'SELECT GEN_ID(' . $tablename[1] . '_gen, 0) AS new_id FROM RDB$DATABASE';

-

- if (!($temp_q_id = @ibase_query($this->db_connect_id, $sql)))

- {

- return false;

- }

-

- $temp_result = @ibase_fetch_assoc($temp_q_id);

- @ibase_free_result($temp_q_id);

-

- return ($temp_result) ? $temp_result['NEW_ID'] : false;

- }

- }

-

- return false;

- }

-

- /**

- * {@inheritDoc}

- */

- function sql_freeresult($query_id = false)

- {

- global $cache;

-

- if ($query_id === false)

- {

- $query_id = $this->query_result;

- }

-

- if ($cache && !is_object($query_id) && $cache->sql_exists($query_id))

- {

- return $cache->sql_freeresult($query_id);

- }

-

- if (isset($this->open_queries[(int) $query_id]))

- {

- unset($this->open_queries[(int) $query_id]);

- return @ibase_free_result($query_id);

- }

-

- return false;

- }

-

- /**

- * {@inheritDoc}

- */

- function sql_escape($msg)

- {

- return str_replace(array("'", "\0"), array("''", ''), $msg);

- }

-

- /**

- * Build LIKE expression

- * @access private

- */

- function _sql_like_expression($expression)

- {

- return $expression . " ESCAPE '\\'";

- }

-

- /**

- * Build db-specific query data

- * @access private

- */

- function _sql_custom_build($stage, $data)

- {

- return $data;

- }

-

- function _sql_bit_and($column_name, $bit, $compare = '')

- {

- return 'BIN_AND(' . $column_name . ', ' . (1 << $bit) . ')' . (($compare) ? ' ' . $compare : '');

- }

-

- function _sql_bit_or($column_name, $bit, $compare = '')

- {

- return 'BIN_OR(' . $column_name . ', ' . (1 << $bit) . ')' . (($compare) ? ' ' . $compare : '');

- }

-

- /**

- * {@inheritDoc}

- */

- function cast_expr_to_bigint($expression)

- {

- // Precision must be from 1 to 18

- return 'CAST(' . $expression . ' as DECIMAL(18, 0))';

- }

-

- /**

- * {@inheritDoc}

- */

- function cast_expr_to_string($expression)

- {

- return 'CAST(' . $expression . ' as VARCHAR(255))';

- }

-

- /**

- * return sql error array

- * @access private

- */

- function _sql_error()

- {

- // Need special handling here because ibase_errmsg returns

- // connection errors, however if the interbase extension

- // is not installed then ibase_errmsg does not exist and

- // we cannot call it.

- if (function_exists('ibase_errmsg'))

- {

- $msg = @ibase_errmsg();

- if (!$msg)

- {

- $msg = $this->connect_error;

- }

- }

- else

- {

- $msg = $this->connect_error;

- }

- return array(

- 'message' => $msg,

- 'code' => (@function_exists('ibase_errcode') ? @ibase_errcode() : '')

- );

- }

-

- /**

- * Close sql connection

- * @access private

- */

- function _sql_close()

- {

- if ($this->service_handle !== false)

- {

- @ibase_service_detach($this->service_handle);

- }

-

- return @ibase_close($this->db_connect_id);

- }

-

- /**

- * Build db-specific report

- * @access private

- */

- function _sql_report($mode, $query = '')

- {

- switch ($mode)

- {

- case 'start':

- break;

-

- case 'fromcache':

- $endtime = explode(' ', microtime());

- $endtime = $endtime[0] + $endtime[1];

-

- $result = @ibase_query($this->db_connect_id, $query);

- while ($void = @ibase_fetch_object($result, IBASE_TEXT))

- {

- // Take the time spent on parsing rows into account

- }

- @ibase_free_result($result);

-

- $splittime = explode(' ', microtime());

- $splittime = $splittime[0] + $splittime[1];

-

- $this->sql_report('record_fromcache', $query, $endtime, $splittime);

-

- break;

- }

- }

-}