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			<?php
			// +----------------------------------------------------------------------+
			// \| PHP versions 4 and 5 \|
			// +----------------------------------------------------------------------+
			// \| Copyright (c) 1998-2007 Manuel Lemos, Tomas V.V.Cox, \|
			// \| Stig. S. Bakken, Lukas Smith, Lorenzo Alberton \|
			// \| All rights reserved. \|
			// +----------------------------------------------------------------------+
			// \| MDB2 is a merge of PEAR DB and Metabases that provides a unified DB \|
			// \| API as well as database abstraction for PHP applications. \|
			// \| This LICENSE is in the BSD license style. \|
			// \| \|
			// \| Redistribution and use in source and binary forms, with or without \|
			// \| modification, are permitted provided that the following conditions \|
			// \| are met: \|
			// \| \|
			// \| Redistributions of source code must retain the above copyright \|
			// \| notice, this list of conditions and the following disclaimer. \|
			// \| \|
			// \| Redistributions in binary form must reproduce the above copyright \|
			// \| notice, this list of conditions and the following disclaimer in the \|
			// \| documentation and/or other materials provided with the distribution. \|
			// \| \|
			// \| Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, \|
			// \| Lukas Smith nor the names of his contributors may be used to endorse \|
			// \| or promote products derived from this software without specific prior\|
			// \| written permission. \|
			// \| \|
			// \| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \|
			// \| "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT \|
			// \| LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS \|
			// \| FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE \|
			// \| REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, \|
			// \| INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, \|
			// \| BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS\|
			// \| OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED \|
			// \| AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT \|
			// \| LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY\|
			// \| WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE \|
			// \| POSSIBILITY OF SUCH DAMAGE. \|
			// +----------------------------------------------------------------------+
			// \| Authors: Lukas Smith <smith@pooteeweet.org> \|
			// \| Lorenzo Alberton <l.alberton@quipo.it> \|
			// +----------------------------------------------------------------------+
			//
			// $Id: sqlite.php,v 1.79 2008/03/05 11:08:53 quipo Exp $
			//

			require_once 'MDB2/Driver/Reverse/Common.php';

			/**
			* MDB2 SQlite driver for the schema reverse engineering module
			*
			* @package MDB2
			* @category Database
			* @author Lukas Smith <smith@pooteeweet.org>
			*/
			class MDB2_Driver_Reverse_sqlite extends MDB2_Driver_Reverse_Common
			{
			function _getTableColumns($sql)
			{
			$db =& $this->getDBInstance();
			if (PEAR::isError($db)) {
			return $db;
			}
			$start_pos = strpos($sql, '(');
			$end_pos = strrpos($sql, ')');
			$column_def = substr($sql, $start_pos+1, $end_pos-$start_pos-1);
			// replace the decimal length-places-separator with a colon
			$column_def = preg_replace('/(\d),(\d)/', '\1:\2', $column_def);
			$column_sql = split(',', $column_def);
			$columns = array();
			$count = count($column_sql);
			if ($count == 0) {
			return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
			'unexpected empty table column definition list', __FUNCTION__);
			}
			$regexp = '/^\s([^\s]+) +(CHAR\|VARCHAR\|VARCHAR2\|TEXT\|BOOLEAN\|SMALLINT\|INT\|INTEGER\|DECIMAL\|BIGINT\|DOUBLE\|FLOAT\|DATETIME\|DATE\|TIME\|LONGTEXT\|LONGBLOB)( ?$([1-9][0-9])(:([1-9][0-9]))?$)?( UNSIGNED)?( PRIMARY KEY)?( DEFAULT (\'[^\']\'\|[^ ]+))?( NULL\| NOT NULL)?( PRIMARY KEY)?$/i';
			$regexp2 = '/^\s*([^ ]+) +(PRIMARY\|UNIQUE\|CHECK)$/i';
			for ($i=0, $j=0; $i<$count; ++$i) {
			if (!preg_match($regexp, trim($column_sql[$i]), $matches)) {
			if (!preg_match($regexp2, trim($column_sql[$i]))) {
			continue;
			}
			return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
			'unexpected table column SQL definition: "'.$column_sql[$i].'"', __FUNCTION__);
			}
			$columns[$j]['name'] = trim($matches[1], implode('', $db->identifier_quoting));
			$columns[$j]['type'] = strtolower($matches[2]);
			if (isset($matches[4]) && strlen($matches[4])) {
			$columns[$j]['length'] = $matches[4];
			}
			if (isset($matches[6]) && strlen($matches[6])) {
			$columns[$j]['decimal'] = $matches[6];
			}
			if (isset($matches[7]) && strlen($matches[7])) {
			$columns[$j]['unsigned'] = true;
			}
			if (isset($matches[8]) && strlen($matches[8])) {
			$columns[$j]['autoincrement'] = true;
			}
			if (isset($matches[10]) && strlen($matches[10])) {
			$default = $matches[10];
			if (strlen($default) && $default[0]=="'") {
			$default = str_replace("''", "'", substr($default, 1, strlen($default)-2));
			}
			if ($default === 'NULL') {
			$default = null;
			}
			$columns[$j]['default'] = $default;
			}
			if (isset($matches[11]) && strlen($matches[11])) {
			$columns[$j]['notnull'] = ($matches[11] === ' NOT NULL');
			}
			++$j;
			}
			return $columns;
			}

			// {{{ getTableFieldDefinition()

			/**
			* Get the stucture of a field into an array
			*
			* @param string $table_name name of table that should be used in method
			* @param string $field_name name of field that should be used in method
			* @return mixed data array on success, a MDB2 error on failure.
			* The returned array contains an array for each field definition,
			* with (some of) these indices:
			* [notnull] [nativetype] [length] [fixed] [default] [type] [mdb2type]
			* @access public
			*/
			function getTableFieldDefinition($table_name, $field_name)
			{
			$db =& $this->getDBInstance();
			if (PEAR::isError($db)) {
			return $db;
			}

			list($schema, $table) = $this->splitTableSchema($table_name);

			$result = $db->loadModule('Datatype', null, true);
			if (PEAR::isError($result)) {
			return $result;
			}
			$query = "SELECT sql FROM sqlite_master WHERE type='table' AND ";
			if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
			$query.= 'LOWER(name)='.$db->quote(strtolower($table), 'text');
			} else {
			$query.= 'name='.$db->quote($table, 'text');
			}
			$sql = $db->queryOne($query);
			if (PEAR::isError($sql)) {
			return $sql;
			}
			$columns = $this->_getTableColumns($sql);
			foreach ($columns as $column) {
			if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
			if ($db->options['field_case'] == CASE_LOWER) {
			$column['name'] = strtolower($column['name']);
			} else {
			$column['name'] = strtoupper($column['name']);
			}
			} else {
			$column = array_change_key_case($column, $db->options['field_case']);
			}
			if ($field_name == $column['name']) {
			$mapped_datatype = $db->datatype->mapNativeDatatype($column);
			if (PEAR::isError($mapped_datatype)) {
			return $mapped_datatype;
			}
			list($types, $length, $unsigned, $fixed) = $mapped_datatype;
			$notnull = false;
			if (!empty($column['notnull'])) {
			$notnull = $column['notnull'];
			}
			$default = false;
			if (array_key_exists('default', $column)) {
			$default = $column['default'];
			if (is_null($default) && $notnull) {
			$default = '';
			}
			}
			$autoincrement = false;
			if (!empty($column['autoincrement'])) {
			$autoincrement = true;
			}

			$definition[0] = array(
			'notnull' => $notnull,
			'nativetype' => preg_replace('/^([a-z]+)[^a-z].*/i', '\\1', $column['type'])
			);
			if (!is_null($length)) {
			$definition[0]['length'] = $length;
			}
			if (!is_null($unsigned)) {
			$definition[0]['unsigned'] = $unsigned;
			}
			if (!is_null($fixed)) {
			$definition[0]['fixed'] = $fixed;
			}
			if ($default !== false) {
			$definition[0]['default'] = $default;
			}
			if ($autoincrement !== false) {
			$definition[0]['autoincrement'] = $autoincrement;
			}
			foreach ($types as $key => $type) {
			$definition[$key] = $definition[0];
			if ($type == 'clob' \|\| $type == 'blob') {
			unset($definition[$key]['default']);
			}
			$definition[$key]['type'] = $type;
			$definition[$key]['mdb2type'] = $type;
			}
			return $definition;
			}
			}

			return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
			'it was not specified an existing table column', __FUNCTION__);
			}

			// }}}
			// {{{ getTableIndexDefinition()

			/**
			* Get the stucture of an index into an array
			*
			* @param string $table_name name of table that should be used in method
			* @param string $index_name name of index that should be used in method
			* @return mixed data array on success, a MDB2 error on failure
			* @access public
			*/
			function getTableIndexDefinition($table_name, $index_name)
			{
			$db =& $this->getDBInstance();
			if (PEAR::isError($db)) {
			return $db;
			}

			list($schema, $table) = $this->splitTableSchema($table_name);

			$query = "SELECT sql FROM sqlite_master WHERE type='index' AND ";
			if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
			$query.= 'LOWER(name)=%s AND LOWER(tbl_name)=' . $db->quote(strtolower($table), 'text');
			} else {
			$query.= 'name=%s AND tbl_name=' . $db->quote($table, 'text');
			}
			$query.= ' AND sql NOT NULL ORDER BY name';
			$index_name_mdb2 = $db->getIndexName($index_name);
			if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
			$qry = sprintf($query, $db->quote(strtolower($index_name_mdb2), 'text'));
			} else {
			$qry = sprintf($query, $db->quote($index_name_mdb2, 'text'));
			}
			$sql = $db->queryOne($qry, 'text');
			if (PEAR::isError($sql) \|\| empty($sql)) {
			// fallback to the given $index_name, without transformation
			if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
			$qry = sprintf($query, $db->quote(strtolower($index_name), 'text'));
			} else {
			$qry = sprintf($query, $db->quote($index_name, 'text'));
			}
			$sql = $db->queryOne($qry, 'text');
			}
			if (PEAR::isError($sql)) {
			return $sql;
			}
			if (!$sql) {
			return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
			'it was not specified an existing table index', __FUNCTION__);
			}

			$sql = strtolower($sql);
			$start_pos = strpos($sql, '(');
			$end_pos = strrpos($sql, ')');
			$column_names = substr($sql, $start_pos+1, $end_pos-$start_pos-1);
			$column_names = split(',', $column_names);

			if (preg_match("/^create unique/", $sql)) {
			return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
			'it was not specified an existing table index', __FUNCTION__);
			}

			$definition = array();
			$count = count($column_names);
			for ($i=0; $i<$count; ++$i) {
			$column_name = strtok($column_names[$i], ' ');
			$collation = strtok(' ');
			$definition['fields'][$column_name] = array(
			'position' => $i+1
			);
			if (!empty($collation)) {
			$definition['fields'][$column_name]['sorting'] =
			($collation=='ASC' ? 'ascending' : 'descending');
			}
			}

			if (empty($definition['fields'])) {
			return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
			'it was not specified an existing table index', __FUNCTION__);
			}
			return $definition;
			}

			// }}}
			// {{{ getTableConstraintDefinition()

			/**
			* Get the stucture of a constraint into an array
			*
			* @param string $table_name name of table that should be used in method
			* @param string $constraint_name name of constraint that should be used in method
			* @return mixed data array on success, a MDB2 error on failure
			* @access public
			*/
			function getTableConstraintDefinition($table_name, $constraint_name)
			{
			$db =& $this->getDBInstance();
			if (PEAR::isError($db)) {
			return $db;
			}

			list($schema, $table) = $this->splitTableSchema($table_name);

			$query = "SELECT sql FROM sqlite_master WHERE type='index' AND ";
			if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
			$query.= 'LOWER(name)=%s AND LOWER(tbl_name)=' . $db->quote(strtolower($table), 'text');
			} else {
			$query.= 'name=%s AND tbl_name=' . $db->quote($table, 'text');
			}
			$query.= ' AND sql NOT NULL ORDER BY name';
			$constraint_name_mdb2 = $db->getIndexName($constraint_name);
			if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
			$qry = sprintf($query, $db->quote(strtolower($constraint_name_mdb2), 'text'));
			} else {
			$qry = sprintf($query, $db->quote($constraint_name_mdb2, 'text'));
			}
			$sql = $db->queryOne($qry, 'text');
			if (PEAR::isError($sql) \|\| empty($sql)) {
			// fallback to the given $index_name, without transformation
			if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
			$qry = sprintf($query, $db->quote(strtolower($constraint_name), 'text'));
			} else {
			$qry = sprintf($query, $db->quote($constraint_name, 'text'));
			}
			$sql = $db->queryOne($qry, 'text');
			}
			if (PEAR::isError($sql)) {
			return $sql;
			}
			//default values, eventually overridden
			$definition = array(
			'primary' => false,
			'unique' => false,
			'foreign' => false,
			'check' => false,
			'fields' => array(),
			'references' => array(
			'table' => '',
			'fields' => array(),
			),
			'onupdate' => '',
			'ondelete' => '',
			'match' => '',
			'deferrable' => false,
			'initiallydeferred' => false,
			);
			if (!$sql) {
			$query = "SELECT sql FROM sqlite_master WHERE type='table' AND ";
			if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
			$query.= 'LOWER(name)='.$db->quote(strtolower($table), 'text');
			} else {
			$query.= 'name='.$db->quote($table, 'text');
			}
			$query.= " AND sql NOT NULL ORDER BY name";
			$sql = $db->queryOne($query, 'text');
			if (PEAR::isError($sql)) {
			return $sql;
			}
			if ($constraint_name == 'primary') {
			// search in table definition for PRIMARY KEYs
			if (preg_match("/\bPRIMARY\s+KEY\b\s*\(([^)]+)/i", $sql, $tmp)) {
			$definition['primary'] = true;
			$definition['fields'] = array();
			$column_names = split(',', $tmp[1]);
			$colpos = 1;
			foreach ($column_names as $column_name) {
			$definition['fields'][trim($column_name)] = array(
			'position' => $colpos++
			);
			}
			return $definition;
			}
			if (preg_match("/\"([^\"]+)\"[^\,\"]+\bPRIMARY\s+KEY\b[^\,\)]*/i", $sql, $tmp)) {
			$definition['primary'] = true;
			$definition['fields'] = array();
			$column_names = split(',', $tmp[1]);
			$colpos = 1;
			foreach ($column_names as $column_name) {
			$definition['fields'][trim($column_name)] = array(
			'position' => $colpos++
			);
			}
			return $definition;
			}
			} else {
			// search in table definition for FOREIGN KEYs
			$pattern = "/\bCONSTRAINT\b\s+%s\s+
			\bFOREIGN\s+KEY\b\s$([^$]+)\)\s
			\bREFERENCES\b\s+([^\s]+)\s$([^$]+)\)\s
			(?:\bMATCH\s([^\s]+))?\s
			(?:\bON\s+UPDATE\s+([^\s,\)]+))?\s*
			(?:\bON\s+DELETE\s+([^\s,\)]+))?\s*
			/imsx";
			$found_fk = false;
			if (preg_match(sprintf($pattern, $constraint_name_mdb2), $sql, $tmp)) {
			$found_fk = true;
			} elseif (preg_match(sprintf($pattern, $constraint_name), $sql, $tmp)) {
			$found_fk = true;
			}
			if ($found_fk) {
			$definition['foreign'] = true;
			$definition['match'] = 'SIMPLE';
			$definition['onupdate'] = 'NO ACTION';
			$definition['ondelete'] = 'NO ACTION';
			$definition['references']['table'] = $tmp[2];
			$column_names = split(',', $tmp[1]);
			$colpos = 1;
			foreach ($column_names as $column_name) {
			$definition['fields'][trim($column_name)] = array(
			'position' => $colpos++
			);
			}
			$referenced_cols = split(',', $tmp[3]);
			$colpos = 1;
			foreach ($referenced_cols as $column_name) {
			$definition['references']['fields'][trim($column_name)] = array(
			'position' => $colpos++
			);
			}
			if (isset($tmp[4])) {
			$definition['match'] = $tmp[4];
			}
			if (isset($tmp[5])) {
			$definition['onupdate'] = $tmp[5];
			}
			if (isset($tmp[6])) {
			$definition['ondelete'] = $tmp[6];
			}
			return $definition;
			}
			}
			$sql = false;
			}
			if (!$sql) {
			return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
			$constraint_name . ' is not an existing table constraint', __FUNCTION__);
			}

			$sql = strtolower($sql);
			$start_pos = strpos($sql, '(');
			$end_pos = strrpos($sql, ')');
			$column_names = substr($sql, $start_pos+1, $end_pos-$start_pos-1);
			$column_names = split(',', $column_names);

			if (!preg_match("/^create unique/", $sql)) {
			return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
			$constraint_name . ' is not an existing table constraint', __FUNCTION__);
			}

			$definition['unique'] = true;
			$count = count($column_names);
			for ($i=0; $i<$count; ++$i) {
			$column_name = strtok($column_names[$i]," ");
			$collation = strtok(" ");
			$definition['fields'][$column_name] = array(
			'position' => $i+1
			);
			if (!empty($collation)) {
			$definition['fields'][$column_name]['sorting'] =
			($collation=='ASC' ? 'ascending' : 'descending');
			}
			}

			if (empty($definition['fields'])) {
			return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
			$constraint_name . ' is not an existing table constraint', __FUNCTION__);
			}
			return $definition;
			}

			// }}}
			// {{{ getTriggerDefinition()

			/**
			* Get the structure of a trigger into an array
			*
			* EXPERIMENTAL
			*
			* WARNING: this function is experimental and may change the returned value
			* at any time until labelled as non-experimental
			*
			* @param string $trigger name of trigger that should be used in method
			* @return mixed data array on success, a MDB2 error on failure
			* @access public
			*/
			function getTriggerDefinition($trigger)
			{
			$db =& $this->getDBInstance();
			if (PEAR::isError($db)) {
			return $db;
			}

			$query = "SELECT name as trigger_name,
			tbl_name AS table_name,
			sql AS trigger_body,
			NULL AS trigger_type,
			NULL AS trigger_event,
			NULL AS trigger_comment,
			1 AS trigger_enabled
			FROM sqlite_master
			WHERE type='trigger'";
			if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
			$query.= ' AND LOWER(name)='.$db->quote(strtolower($trigger), 'text');
			} else {
			$query.= ' AND name='.$db->quote($trigger, 'text');
			}
			$types = array(
			'trigger_name' => 'text',
			'table_name' => 'text',
			'trigger_body' => 'text',
			'trigger_type' => 'text',
			'trigger_event' => 'text',
			'trigger_comment' => 'text',
			'trigger_enabled' => 'boolean',
			);
			$def = $db->queryRow($query, $types, MDB2_FETCHMODE_ASSOC);
			if (PEAR::isError($def)) {
			return $def;
			}
			if (empty($def)) {
			return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
			'it was not specified an existing trigger', __FUNCTION__);
			}
			if (preg_match("/^create\s+(?:temp\|temporary)?trigger\s+(?:if\s+not\s+exists\s+)?.*(before\|after)?\s+(insert\|update\|delete)/Uims", $def['trigger_body'], $tmp)) {
			$def['trigger_type'] = strtoupper($tmp[1]);
			$def['trigger_event'] = strtoupper($tmp[2]);
			}
			return $def;
			}

			// }}}
			// {{{ tableInfo()

			/**
			* Returns information about a table
			*
			* @param string $result a string containing the name of a table
			* @param int $mode a valid tableInfo mode
			*
			* @return array an associative array with the information requested.
			* A MDB2_Error object on failure.
			*
			* @see MDB2_Driver_Common::tableInfo()
			* @since Method available since Release 1.7.0
			*/
			function tableInfo($result, $mode = null)
			{
			if (is_string($result)) {
			return parent::tableInfo($result, $mode);
			}

			$db =& $this->getDBInstance();
			if (PEAR::isError($db)) {
			return $db;
			}

			return $db->raiseError(MDB2_ERROR_NOT_CAPABLE, null, null,
			'This DBMS can not obtain tableInfo from result sets', __FUNCTION__);
			}
			}

			?>