Proyectos de Subversion Moodle

<?php

/**

 * ADOdb driver for ADS.

 *

 * NOTE: This driver requires the Advantage PHP client libraries, which

 * can be downloaded for free via:

 * @link http://devzone.advantagedatabase.com/dz/content.aspx?key=20

 *

 * This file is part of ADOdb, a Database Abstraction Layer library for PHP.

 *

 * @package ADOdb

 * @link https://adodb.org Project's web site and documentation

 * @link https://github.com/ADOdb/ADOdb Source code and issue tracker

 *

 * The ADOdb Library is dual-licensed, released under both the BSD 3-Clause

 * and the GNU Lesser General Public Licence (LGPL) v2.1 or, at your option,

 * any later version. This means you can use it in proprietary products.

 * See the LICENSE.md file distributed with this source code for details.

 * @license BSD-3-Clause

 * @license LGPL-2.1-or-later

 *

 * @copyright 2000-2013 John Lim

 * @copyright 2014 Damien Regad, Mark Newnham and the ADOdb community

 */

/*

DELPHI FOR PHP USERS:

      The following steps can be taken to utilize this driver from the

      CodeGear Delphi for PHP product:

        1 - See note above, download and install the Advantage PHP client.

        2 - Copy the following files to the Delphi for PHP\X.X\php\ext directory:

              ace32.dll

              axcws32.dll

              adsloc32.dll

              php_advantage.dll (rename the existing php_advantage.dll.5.x.x file)

        3 - Add the following line to the Delphi for PHP\X.X\php\php.ini.template file:

              extension=php_advantage.dll

        4 - To use: enter "ads" as the DriverName on a connection component, and set

            a Host property similar to "DataDirectory=c:\". See the Advantage PHP

            help file topic for ads_connect for details on connection path options

            and formatting.

        5 - (optional) - Modify the Delphi for PHP\X.X\vcl\packages\database.packages.php

            file and add ads to the list of strings returned when registering the

            Database object's DriverName property.

*/

// security - hide paths

if (!defined('ADODB_DIR')) {

	die();

}

define("_ADODB_ADS_LAYER", 2);

/*--------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------*/

class ADODB_ads extends ADOConnection

{

	var $databaseType = "ads";

	var $fmt = "'m-d-Y'";

	var $fmtTimeStamp = "'Y-m-d H:i:s'";

	var $concat_operator = '';

	var $replaceQuote = "''"; // string to use to replace quotes

	var $dataProvider = "ads";

	var $hasAffectedRows = true;

	var $binmode = ODBC_BINMODE_RETURN;

	var $useFetchArray = false; // setting this to true will make array elements in FETCH_ASSOC mode case-sensitive

	// breaking backward-compat

	//var $longreadlen = 8000; // default number of chars to return for a Blob/Long field

	var $_bindInputArray = false;

	var $curmode = SQL_CUR_USE_DRIVER; // See sqlext.h, SQL_CUR_DEFAULT == SQL_CUR_USE_DRIVER == 2L

	var $_genSeqSQL = "create table %s (id integer)";

	var $_autocommit = true;

	var $_lastAffectedRows = 0;

	var $uCaseTables = true; // for meta* functions, uppercase table names

	function __construct()

	{

	}

	// returns true or false

	function _connect($argDSN, $argUsername, $argPassword, $argDatabasename)

	{

		if (!function_exists('ads_connect')) {

			return null;

		}

		if ($this->debug && $argDatabasename && $this->databaseType != 'vfp') {

			ADOConnection::outp("For Advantage Connect(), $argDatabasename is not used. Place dsn in 1st parameter.");

		}

		$last_php_error = $this->resetLastError();

		if ($this->curmode === false) {

			$this->_connectionID = ads_connect($argDSN, $argUsername, $argPassword);

		} else {

			$this->_connectionID = ads_connect($argDSN, $argUsername, $argPassword, $this->curmode);

		}

		$this->_errorMsg = $this->getChangedErrorMsg($last_php_error);

		if ($this->connectStmt) {

			$this->Execute($this->connectStmt);

		}

		return $this->_connectionID != false;

	}

	// returns true or false

	function _pconnect($argDSN, $argUsername, $argPassword, $argDatabasename)

	{

		if (!function_exists('ads_connect')) {

			return null;

		}

		$last_php_error = $this->resetLastError();

		$this->_errorMsg = '';

		if ($this->debug && $argDatabasename) {

			ADOConnection::outp("For PConnect(), $argDatabasename is not used. Place dsn in 1st parameter.");

		}

		//  print "dsn=$argDSN u=$argUsername p=$argPassword<br>"; flush();

		if ($this->curmode === false) {

			$this->_connectionID = ads_connect($argDSN, $argUsername, $argPassword);

		} else {

			$this->_connectionID = ads_pconnect($argDSN, $argUsername, $argPassword, $this->curmode);

		}

		$this->_errorMsg = $this->getChangedErrorMsg($last_php_error);

		if ($this->_connectionID && $this->autoRollback) {

			@ads_rollback($this->_connectionID);

		}

		if ($this->connectStmt) {

			$this->Execute($this->connectStmt);

		}

		return $this->_connectionID != false;

	}

	// returns the Server version and Description

	function ServerInfo()

	{

		if (!empty($this->host)) {

			$stmt = $this->Prepare('EXECUTE PROCEDURE sp_mgGetInstallInfo()');

			$res = $this->Execute($stmt);

			if (!$res) {

				print $this->ErrorMsg();

			} else {

				$ret["version"] = $res->fields[3];

				$ret["description"] = "Advantage Database Server";

				return $ret;

			}

		} else {

			return ADOConnection::ServerInfo();

		}

	}

	// returns true or false

	function CreateSequence($seqname = 'adodbseq', $start = 1)

	{

		$res = $this->Execute("CREATE TABLE $seqname ( ID autoinc( 1 ) ) IN DATABASE");

		if (!$res) {

			print $this->ErrorMsg();

			return false;

		} else {

			return true;

		}

	}

	// returns true or false

	function DropSequence($seqname = 'adodbseq')

	{

		$res = $this->Execute("DROP TABLE $seqname");

		if (!$res) {

			print $this->ErrorMsg();

			return false;

		} else {

			return true;

		}

	}

	// returns the generated ID or false

	// checks if the table already exists, else creates the table and inserts a record into the table

	// and gets the ID number of the last inserted record.

	function GenID($seqname = 'adodbseq', $start = 1)

	{

		$go = $this->Execute("select * from $seqname");

		if (!$go) {

			$res = $this->Execute("CREATE TABLE $seqname ( ID autoinc( 1 ) ) IN DATABASE");

			if (!$res) {

				print $this->ErrorMsg();

				return false;

			}

		}

		$res = $this->Execute("INSERT INTO $seqname VALUES( DEFAULT )");

		if (!$res) {

			print $this->ErrorMsg();

			return false;

		} else {

			$gen = $this->Execute("SELECT LastAutoInc( STATEMENT ) FROM system.iota");

			$ret = $gen->fields[0];

			return $ret;

		}

	}

	function ErrorMsg()

	{

		if ($this->_errorMsg !== false) {

			return $this->_errorMsg;

		}

		if (empty($this->_connectionID)) {

			return @ads_errormsg();

		}

		return @ads_errormsg($this->_connectionID);

	}

	function ErrorNo()

	{

		if ($this->_errorCode !== false) {

			// bug in 4.0.6, error number can be corrupted string (should be 6 digits)

			return (strlen($this->_errorCode) <= 2) ? 0 : $this->_errorCode;

		}

		if (empty($this->_connectionID)) {

			$e = @ads_error();

		} else {

			$e = @ads_error($this->_connectionID);

		}

		// bug in 4.0.6, error number can be corrupted string (should be 6 digits)

		// so we check and patch

		if (strlen($e) <= 2) {

			return 0;

		}

		return $e;

	}

	function BeginTrans()

	{

		if (!$this->hasTransactions) {

			return false;

		}

		if ($this->transOff) {

			return true;

		}

		$this->transCnt += 1;

		$this->_autocommit = false;

		return ads_autocommit($this->_connectionID, false);

	}

	function CommitTrans($ok = true)

	{

		if ($this->transOff) {

			return true;

		}

		if (!$ok) {

			return $this->RollbackTrans();

		}

		if ($this->transCnt) {

			$this->transCnt -= 1;

		}

		$this->_autocommit = true;

		$ret = ads_commit($this->_connectionID);

		ads_autocommit($this->_connectionID, true);

		return $ret;

	}

	function RollbackTrans()

	{

		if ($this->transOff) {

			return true;

		}

		if ($this->transCnt) {

			$this->transCnt -= 1;

		}

		$this->_autocommit = true;

		$ret = ads_rollback($this->_connectionID);

		ads_autocommit($this->_connectionID, true);

		return $ret;

	}

	// Returns tables,Views or both on successful execution. Returns

	// tables by default on successful execution.

	function &MetaTables($ttype = false, $showSchema = false, $mask = false)

	{

		$recordSet1 = $this->Execute("select * from system.tables");

		if (!$recordSet1) {

			print $this->ErrorMsg();

			return false;

		}

		$recordSet2 = $this->Execute("select * from system.views");

		if (!$recordSet2) {

			print $this->ErrorMsg();

			return false;

		}

		$i = 0;

		while (!$recordSet1->EOF) {

			$arr["$i"] = $recordSet1->fields[0];

			$recordSet1->MoveNext();

			$i = $i + 1;

		}

		if ($ttype == 'FALSE') {

			while (!$recordSet2->EOF) {

				$arr["$i"] = $recordSet2->fields[0];

				$recordSet2->MoveNext();

				$i = $i + 1;

			}

			return $arr;

		} elseif ($ttype == 'VIEWS') {

			while (!$recordSet2->EOF) {

				$arrV["$i"] = $recordSet2->fields[0];

				$recordSet2->MoveNext();

				$i = $i + 1;

			}

			return $arrV;

		} else {

			return $arr;

		}

	}

	function &MetaPrimaryKeys($table, $owner = false)

	{

		$recordSet = $this->Execute("select table_primary_key from system.tables where name='$table'");

		if (!$recordSet) {

			print $this->ErrorMsg();

			return false;

		}

		$i = 0;

		while (!$recordSet->EOF) {

			$arr["$i"] = $recordSet->fields[0];

			$recordSet->MoveNext();

			$i = $i + 1;

		}

		return $arr;

	}

	/*

	See http://msdn.microsoft.com/library/default.asp?url=/library/en-us/odbc/htm/odbcdatetime_data_type_changes.asp

	/ SQL data type codes /

	#define SQL_UNKNOWN_TYPE  0

	#define SQL_CHAR      1

	#define SQL_NUMERIC    2

	#define SQL_DECIMAL    3

	#define SQL_INTEGER    4

	#define SQL_SMALLINT    5

	#define SQL_FLOAT      6

	#define SQL_REAL      7

	#define SQL_DOUBLE      8

	#if (ODBCVER >= 0x0300)

	#define SQL_DATETIME    9

	#endif

	#define SQL_VARCHAR   12

	/ One-parameter shortcuts for date/time data types /

	#if (ODBCVER >= 0x0300)

	#define SQL_TYPE_DATE   91

	#define SQL_TYPE_TIME   92

	#define SQL_TYPE_TIMESTAMP 93

	#define SQL_UNICODE                             (-95)

	#define SQL_UNICODE_VARCHAR                     (-96)

	#define SQL_UNICODE_LONGVARCHAR                 (-97)

	*/

	function ODBCTypes($t)

	{

		switch ((integer)$t) {

			case 1:

			case 12:

			case 0:

			case -95:

			case -96:

				return 'C';

			case -97:

			case -1: //text

				return 'X';

			case -4: //image

				return 'B';

			case 9:

			case 91:

				return 'D';

			case 10:

			case 11:

			case 92:

			case 93:

				return 'T';

			case 4:

			case 5:

			case -6:

				return 'I';

			case -11: // uniqidentifier

				return 'R';

			case -7: //bit

				return 'L';

			default:

				return 'N';

		}

	}

	function &MetaColumns($table, $normalize = true)

	{

		global $ADODB_FETCH_MODE;

		$false = false;

		if ($this->uCaseTables) {

			$table = strtoupper($table);

		}

		$schema = '';

		$this->_findschema($table, $schema);

		$savem = $ADODB_FETCH_MODE;

		$ADODB_FETCH_MODE = ADODB_FETCH_NUM;

		/*if (false) { // after testing, confirmed that the following does not work because of a bug

		  $qid2 = ads_tables($this->_connectionID);

		  $rs = new ADORecordSet_ads($qid2);

		  $ADODB_FETCH_MODE = $savem;

		  if (!$rs) return false;

		  $rs->_fetch();

		  while (!$rs->EOF) {

			if ($table == strtoupper($rs->fields[2])) {

			  $q = $rs->fields[0];

			  $o = $rs->fields[1];

			  break;

			}

			$rs->MoveNext();

		  }

		  $rs->Close();

		  $qid = ads_columns($this->_connectionID,$q,$o,strtoupper($table),'%');

		} */

		switch ($this->databaseType) {

			case 'access':

			case 'vfp':

				$qid = ads_columns($this->_connectionID);#,'%','',strtoupper($table),'%');

				break;

			case 'db2':

				$colname = "%";

				$qid = ads_columns($this->_connectionID, "", $schema, $table, $colname);

				break;

			default:

				$qid = @ads_columns($this->_connectionID, '%', '%', strtoupper($table), '%');

				if (empty($qid)) {

					$qid = ads_columns($this->_connectionID);

				}

				break;

		}

		if (empty($qid)) {

			return $false;

		}

		$rs = new ADORecordSet_ads($qid);

		$ADODB_FETCH_MODE = $savem;

		if (!$rs) {

			return $false;

		}

		$rs->_fetch();

		$retarr = array();

		/*

		$rs->fields indices

		1 TABLE_SCHEM

		2 TABLE_NAME

		3 COLUMN_NAME

		4 DATA_TYPE

		5 TYPE_NAME

		6 PRECISION

		7 LENGTH

		8 SCALE

		9 RADIX

		10 NULLABLE

		11 REMARKS

		*/

		while (!$rs->EOF) {

			//  adodb_pr($rs->fields);

			if (strtoupper(trim($rs->fields[2])) == $table && (!$schema || strtoupper($rs->fields[1]) == $schema)) {

				$fld = new ADOFieldObject();

				$fld->name = $rs->fields[3];

				$fld->type = $this->ODBCTypes($rs->fields[4]);

				// ref: http://msdn.microsoft.com/library/default.asp?url=/archive/en-us/dnaraccgen/html/msdn_odk.asp

				// access uses precision to store length for char/varchar

				if ($fld->type == 'C' or $fld->type == 'X') {

					if ($this->databaseType == 'access') {

						$fld->max_length = $rs->fields[6];

					} else {

						if ($rs->fields[4] <= -95) // UNICODE

						{

							$fld->max_length = $rs->fields[7] / 2;

						} else {

							$fld->max_length = $rs->fields[7];

						}

					}

				} else {

					$fld->max_length = $rs->fields[7];

				}

				$fld->not_null = !empty($rs->fields[10]);

				$fld->scale = $rs->fields[8];

				$retarr[strtoupper($fld->name)] = $fld;

			} else {

				if (sizeof($retarr) > 0) {

					break;

				}

			}

			$rs->MoveNext();

		}

		$rs->Close(); //-- crashes 4.03pl1 -- why?

		if (empty($retarr)) {

			$retarr = false;

		}

		return $retarr;

	}

	// Returns an array of columns names for a given table

	function &MetaColumnNames($table, $numIndexes = false, $useattnum = false)

	{

		$recordSet = $this->Execute("select name from system.columns where parent='$table'");

		if (!$recordSet) {

			print $this->ErrorMsg();

			return false;

		} else {

			$i = 0;

			while (!$recordSet->EOF) {

				$arr["FIELD$i"] = $recordSet->fields[0];

				$recordSet->MoveNext();

				$i = $i + 1;

			}

			return $arr;

		}

	}

	function Prepare($sql)

	{

		if (!$this->_bindInputArray) {

			return $sql;

		} // no binding

		$stmt = ads_prepare($this->_connectionID, $sql);

		if (!$stmt) {

			// we don't know whether odbc driver is parsing prepared stmts, so just return sql

			return $sql;

		}

		return array($sql, $stmt, false);

	}

	function _query($sql, $inputarr = false)

	{

		$last_php_error = $this->resetLastError();

		$this->_errorMsg = '';

		if ($inputarr) {

			if (is_array($sql)) {

				$stmtid = $sql[1];

			} else {

				$stmtid = ads_prepare($this->_connectionID, $sql);

				if ($stmtid == false) {

					$this->_errorMsg = $this->getChangedErrorMsg($last_php_error);

					return false;

				}

			}

			if (!ads_execute($stmtid, $inputarr)) {

				//@ads_free_result($stmtid);

				$this->_errorMsg = ads_errormsg();

				$this->_errorCode = ads_error();

				return false;

			}

		} else {

			if (is_array($sql)) {

				$stmtid = $sql[1];

				if (!ads_execute($stmtid)) {

					//@ads_free_result($stmtid);

					$this->_errorMsg = ads_errormsg();

					$this->_errorCode = ads_error();

					return false;

				}

			} else {

				$stmtid = ads_exec($this->_connectionID, $sql);

			}

		}

		$this->_lastAffectedRows = 0;

		if ($stmtid) {

			if (@ads_num_fields($stmtid) == 0) {

				$this->_lastAffectedRows = ads_num_rows($stmtid);

				$stmtid = true;

			} else {

				$this->_lastAffectedRows = 0;

				ads_binmode($stmtid, $this->binmode);

				ads_longreadlen($stmtid, $this->maxblobsize);

			}

			$this->_errorMsg = '';

			$this->_errorCode = 0;

		} else {

			$this->_errorMsg = ads_errormsg();

			$this->_errorCode = ads_error();

		}

		return $stmtid;

	}

	/*

	  Insert a null into the blob field of the table first.

	  Then use UpdateBlob to store the blob.

	  Usage:

	  $conn->Execute('INSERT INTO blobtable (id, blobcol) VALUES (1, null)');

	  $conn->UpdateBlob('blobtable','blobcol',$blob,'id=1');

	 */

	function UpdateBlob($table, $column, $val, $where, $blobtype = 'BLOB')

	{

		$last_php_error = $this->resetLastError();

		$sql = "UPDATE $table SET $column=? WHERE $where";

		$stmtid = ads_prepare($this->_connectionID, $sql);

		if ($stmtid == false) {

			$this->_errorMsg = $this->getChangedErrorMsg($last_php_error);

			return false;

		}

		if (!ads_execute($stmtid, array($val), array(SQL_BINARY))) {

			$this->_errorMsg = ads_errormsg();

			$this->_errorCode = ads_error();

			return false;

		}

		return true;

	}

	// returns true or false

	function _close()

	{

		$ret = @ads_close($this->_connectionID);

		$this->_connectionID = false;

		return $ret;

	}

	function _affectedrows()

	{

		return $this->_lastAffectedRows;

	}

}

/*--------------------------------------------------------------------------------------

   Class Name: Recordset

--------------------------------------------------------------------------------------*/

class ADORecordSet_ads extends ADORecordSet

{

	var $bind = false;

	var $databaseType = "ads";

	var $dataProvider = "ads";

	var $useFetchArray;

	function __construct($id, $mode = false)

	{

		if ($mode === false) {

			global $ADODB_FETCH_MODE;

			$mode = $ADODB_FETCH_MODE;

		}

		$this->fetchMode = $mode;

		$this->_queryID = $id;

		// the following is required for mysql odbc driver in 4.3.1 -- why?

		$this->EOF = false;

		$this->_currentRow = -1;

		//parent::__construct($id);

	}

	// returns the field object

	function &FetchField($fieldOffset = -1)

	{

		$off = $fieldOffset + 1; // offsets begin at 1

		$o = new ADOFieldObject();

		$o->name = @ads_field_name($this->_queryID, $off);

		$o->type = @ads_field_type($this->_queryID, $off);

		$o->max_length = @ads_field_len($this->_queryID, $off);

		if (ADODB_ASSOC_CASE == 0) {

			$o->name = strtolower($o->name);

		} else {

			if (ADODB_ASSOC_CASE == 1) {

				$o->name = strtoupper($o->name);

			}

		}

		return $o;

	}

	/* Use associative array to get fields array */

	function Fields($colname)

	{

		if ($this->fetchMode & ADODB_FETCH_ASSOC) {

			return $this->fields[$colname];

		}

		if (!$this->bind) {

			$this->bind = array();

			for ($i = 0; $i < $this->_numOfFields; $i++) {

				$o = $this->FetchField($i);

				$this->bind[strtoupper($o->name)] = $i;

			}

		}

		return $this->fields[$this->bind[strtoupper($colname)]];

	}

	function _initrs()

	{

		global $ADODB_COUNTRECS;

		$this->_numOfRows = ($ADODB_COUNTRECS) ? @ads_num_rows($this->_queryID) : -1;

		$this->_numOfFields = @ads_num_fields($this->_queryID);

		// some silly drivers such as db2 as/400 and intersystems cache return _numOfRows = 0

		if ($this->_numOfRows == 0) {

			$this->_numOfRows = -1;

		}

		//$this->useFetchArray = $this->connection->useFetchArray;

	}

	function _seek($row)

	{

		return false;

	}

	// speed up SelectLimit() by switching to ADODB_FETCH_NUM as ADODB_FETCH_ASSOC is emulated

	function &GetArrayLimit($nrows, $offset = -1)

	{

		if ($offset <= 0) {

			$rs =& $this->GetArray($nrows);

			return $rs;

		}

		$savem = $this->fetchMode;

		$this->fetchMode = ADODB_FETCH_NUM;

		$this->Move($offset);

		$this->fetchMode = $savem;

		if ($this->fetchMode & ADODB_FETCH_ASSOC) {

			$this->fields =& $this->GetRowAssoc();

		}

		$results = array();

		$cnt = 0;

		while (!$this->EOF && $nrows != $cnt) {

			$results[$cnt++] = $this->fields;

			$this->MoveNext();

		}

		return $results;

	}

	function MoveNext()

	{

		if ($this->_numOfRows != 0 && !$this->EOF) {

			$this->_currentRow++;

			if ($this->_fetch()) {

				return true;

			}

		}

		$this->fields = false;

		$this->EOF = true;

		return false;

	}

	function _fetch()

	{

		$this->fields = false;

		$rez = @ads_fetch_into($this->_queryID, $this->fields);

		if ($rez) {

			if ($this->fetchMode & ADODB_FETCH_ASSOC) {

				$this->fields =& $this->GetRowAssoc();

			}

			return true;

		}

		return false;

	}

	function _close()

	{

		return @ads_free_result($this->_queryID);

	}

}