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+<?php
+
+/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
+
+/**
+ * The PEAR DB driver for PHP's dbase extension
+ * for interacting with dBase databases
+ *
+ * PHP versions 4 and 5
+ *
+ * LICENSE: This source file is subject to version 3.0 of the PHP license
+ * that is available through the world-wide-web at the following URI:
+ * http://www.php.net/license/3_0.txt. If you did not receive a copy of
+ * the PHP License and are unable to obtain it through the web, please
+ * send a note to license@php.net so we can mail you a copy immediately.
+ *
+ * @category Database
+ * @package DB
+ * @author Tomas V.V. Cox <cox@idecnet.com>
+ * @author Daniel Convissor <danielc@php.net>
+ * @copyright 1997-2007 The PHP Group
+ * @license http://www.php.net/license/3_0.txt PHP License 3.0
+ * @version CVS: $Id: dbase.php,v 1.45 2007/09/21 13:40:41 aharvey Exp $
+ * @link http://pear.php.net/package/DB
+ */
+
+/**
+ * Obtain the DB_common class so it can be extended from
+ */
+require_once 'DB/common.php';
+
+/**
+ * The methods PEAR DB uses to interact with PHP's dbase extension
+ * for interacting with dBase databases
+ *
+ * These methods overload the ones declared in DB_common.
+ *
+ * @category Database
+ * @package DB
+ * @author Tomas V.V. Cox <cox@idecnet.com>
+ * @author Daniel Convissor <danielc@php.net>
+ * @copyright 1997-2007 The PHP Group
+ * @license http://www.php.net/license/3_0.txt PHP License 3.0
+ * @version Release: 1.7.14RC1
+ * @link http://pear.php.net/package/DB
+ */
+class DB_dbase extends DB_common
+{
+ // {{{ properties
+
+ /**
+ * The DB driver type (mysql, oci8, odbc, etc.)
+ * @var string
+ */
+ var $phptype = 'dbase';
+
+ /**
+ * The database syntax variant to be used (db2, access, etc.), if any
+ * @var string
+ */
+ var $dbsyntax = 'dbase';
+
+ /**
+ * The capabilities of this DB implementation
+ *
+ * The 'new_link' element contains the PHP version that first provided
+ * new_link support for this DBMS. Contains false if it's unsupported.
+ *
+ * Meaning of the 'limit' element:
+ * + 'emulate' = emulate with fetch row by number
+ * + 'alter' = alter the query
+ * + false = skip rows
+ *
+ * @var array
+ */
+ var $features = array(
+ 'limit' => false,
+ 'new_link' => false,
+ 'numrows' => true,
+ 'pconnect' => false,
+ 'prepare' => false,
+ 'ssl' => false,
+ 'transactions' => false,
+ );
+
+ /**
+ * A mapping of native error codes to DB error codes
+ * @var array
+ */
+ var $errorcode_map = array(
+ );
+
+ /**
+ * The raw database connection created by PHP
+ * @var resource
+ */
+ var $connection;
+
+ /**
+ * The DSN information for connecting to a database
+ * @var array
+ */
+ var $dsn = array();
+
+
+ /**
+ * A means of emulating result resources
+ * @var array
+ */
+ var $res_row = array();
+
+ /**
+ * The quantity of results so far
+ *
+ * For emulating result resources.
+ *
+ * @var integer
+ */
+ var $result = 0;
+
+ /**
+ * Maps dbase data type id's to human readable strings
+ *
+ * The human readable values are based on the output of PHP's
+ * dbase_get_header_info() function.
+ *
+ * @var array
+ * @since Property available since Release 1.7.0
+ */
+ var $types = array(
+ 'C' => 'character',
+ 'D' => 'date',
+ 'L' => 'boolean',
+ 'M' => 'memo',
+ 'N' => 'number',
+ );
+
+
+ // }}}
+ // {{{ constructor
+
+ /**
+ * This constructor calls <kbd>$this->DB_common()</kbd>
+ *
+ * @return void
+ */
+ function DB_dbase()
+ {
+ $this->DB_common();
+ }
+
+ // }}}
+ // {{{ connect()
+
+ /**
+ * Connect to the database and create it if it doesn't exist
+ *
+ * Don't call this method directly. Use DB::connect() instead.
+ *
+ * PEAR DB's dbase driver supports the following extra DSN options:
+ * + mode An integer specifying the read/write mode to use
+ * (0 = read only, 1 = write only, 2 = read/write).
+ * Available since PEAR DB 1.7.0.
+ * + fields An array of arrays that PHP's dbase_create() function needs
+ * to create a new database. This information is used if the
+ * dBase file specified in the "database" segment of the DSN
+ * does not exist. For more info, see the PHP manual's
+ * {@link http://php.net/dbase_create dbase_create()} page.
+ * Available since PEAR DB 1.7.0.
+ *
+ * Example of how to connect and establish a new dBase file if necessary:
+ * <code>
+ * require_once 'DB.php';
+ *
+ * $dsn = array(
+ * 'phptype' => 'dbase',
+ * 'database' => '/path/and/name/of/dbase/file',
+ * 'mode' => 2,
+ * 'fields' => array(
+ * array('a', 'N', 5, 0),
+ * array('b', 'C', 40),
+ * array('c', 'C', 255),
+ * array('d', 'C', 20),
+ * ),
+ * );
+ * $options = array(
+ * 'debug' => 2,
+ * 'portability' => DB_PORTABILITY_ALL,
+ * );
+ *
+ * $db = DB::connect($dsn, $options);
+ * if (PEAR::isError($db)) {
+ * die($db->getMessage());
+ * }
+ * </code>
+ *
+ * @param array $dsn the data source name
+ * @param bool $persistent should the connection be persistent?
+ *
+ * @return int DB_OK on success. A DB_Error object on failure.
+ */
+ function connect($dsn, $persistent = false)
+ {
+ if (!PEAR::loadExtension('dbase')) {
+ return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
+ }
+
+ $this->dsn = $dsn;
+ if ($dsn['dbsyntax']) {
+ $this->dbsyntax = $dsn['dbsyntax'];
+ }
+
+ /*
+ * Turn track_errors on for entire script since $php_errormsg
+ * is the only way to find errors from the dbase extension.
+ */
+ @ini_set('track_errors', 1);
+ $php_errormsg = '';
+
+ if (!file_exists($dsn['database'])) {
+ $this->dsn['mode'] = 2;
+ if (empty($dsn['fields']) || !is_array($dsn['fields'])) {
+ return $this->raiseError(DB_ERROR_CONNECT_FAILED,
+ null, null, null,
+ 'the dbase file does not exist and '
+ . 'it could not be created because '
+ . 'the "fields" element of the DSN '
+ . 'is not properly set');
+ }
+ $this->connection = @dbase_create($dsn['database'],
+ $dsn['fields']);
+ if (!$this->connection) {
+ return $this->raiseError(DB_ERROR_CONNECT_FAILED,
+ null, null, null,
+ 'the dbase file does not exist and '
+ . 'the attempt to create it failed: '
+ . $php_errormsg);
+ }
+ } else {
+ if (!isset($this->dsn['mode'])) {
+ $this->dsn['mode'] = 0;
+ }
+ $this->connection = @dbase_open($dsn['database'],
+ $this->dsn['mode']);
+ if (!$this->connection) {
+ return $this->raiseError(DB_ERROR_CONNECT_FAILED,
+ null, null, null,
+ $php_errormsg);
+ }
+ }
+ return DB_OK;
+ }
+
+ // }}}
+ // {{{ disconnect()
+
+ /**
+ * Disconnects from the database server
+ *
+ * @return bool TRUE on success, FALSE on failure
+ */
+ function disconnect()
+ {
+ $ret = @dbase_close($this->connection);
+ $this->connection = null;
+ return $ret;
+ }
+
+ // }}}
+ // {{{ &query()
+
+ function &query($query = null)
+ {
+ // emulate result resources
+ $this->res_row[(int)$this->result] = 0;
+ $tmp = new DB_result($this, $this->result++);
+ return $tmp;
+ }
+
+ // }}}
+ // {{{ fetchInto()
+
+ /**
+ * Places a row from the result set into the given array
+ *
+ * Formating of the array and the data therein are configurable.
+ * See DB_result::fetchInto() for more information.
+ *
+ * This method is not meant to be called directly. Use
+ * DB_result::fetchInto() instead. It can't be declared "protected"
+ * because DB_result is a separate object.
+ *
+ * @param resource $result the query result resource
+ * @param array $arr the referenced array to put the data in
+ * @param int $fetchmode how the resulting array should be indexed
+ * @param int $rownum the row number to fetch (0 = first row)
+ *
+ * @return mixed DB_OK on success, NULL when the end of a result set is
+ * reached or on failure
+ *
+ * @see DB_result::fetchInto()
+ */
+ function fetchInto($result, &$arr, $fetchmode, $rownum = null)
+ {
+ if ($rownum === null) {
+ $rownum = $this->res_row[(int)$result]++;
+ }
+ if ($fetchmode & DB_FETCHMODE_ASSOC) {
+ $arr = @dbase_get_record_with_names($this->connection, $rownum);
+ if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {
+ $arr = array_change_key_case($arr, CASE_LOWER);
+ }
+ } else {
+ $arr = @dbase_get_record($this->connection, $rownum);
+ }
+ if (!$arr) {
+ return null;
+ }
+ if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {
+ $this->_rtrimArrayValues($arr);
+ }
+ if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) {
+ $this->_convertNullArrayValuesToEmpty($arr);
+ }
+ return DB_OK;
+ }
+
+ // }}}
+ // {{{ freeResult()
+
+ /**
+ * Deletes the result set and frees the memory occupied by the result set.
+ *
+ * This method is a no-op for dbase, as there aren't result resources in
+ * the same sense as most other database backends.
+ *
+ * @param resource $result PHP's query result resource
+ *
+ * @return bool TRUE on success, FALSE if $result is invalid
+ *
+ * @see DB_result::free()
+ */
+ function freeResult($result)
+ {
+ return true;
+ }
+
+ // }}}
+ // {{{ numCols()
+
+ /**
+ * Gets the number of columns in a result set
+ *
+ * This method is not meant to be called directly. Use
+ * DB_result::numCols() instead. It can't be declared "protected"
+ * because DB_result is a separate object.
+ *
+ * @param resource $result PHP's query result resource
+ *
+ * @return int the number of columns. A DB_Error object on failure.
+ *
+ * @see DB_result::numCols()
+ */
+ function numCols($foo)
+ {
+ return @dbase_numfields($this->connection);
+ }
+
+ // }}}
+ // {{{ numRows()
+
+ /**
+ * Gets the number of rows in a result set
+ *
+ * This method is not meant to be called directly. Use
+ * DB_result::numRows() instead. It can't be declared "protected"
+ * because DB_result is a separate object.
+ *
+ * @param resource $result PHP's query result resource
+ *
+ * @return int the number of rows. A DB_Error object on failure.
+ *
+ * @see DB_result::numRows()
+ */
+ function numRows($foo)
+ {
+ return @dbase_numrecords($this->connection);
+ }
+
+ // }}}
+ // {{{ quoteBoolean()
+
+ /**
+ * Formats a boolean value for use within a query in a locale-independent
+ * manner.
+ *
+ * @param boolean the boolean value to be quoted.
+ * @return string the quoted string.
+ * @see DB_common::quoteSmart()
+ * @since Method available since release 1.7.8.
+ */
+ function quoteBoolean($boolean) {
+ return $boolean ? 'T' : 'F';
+ }
+
+ // }}}
+ // {{{ tableInfo()
+
+ /**
+ * Returns information about the current database
+ *
+ * @param mixed $result THIS IS UNUSED IN DBASE. The current database
+ * is examined regardless of what is provided here.
+ * @param int $mode a valid tableInfo mode
+ *
+ * @return array an associative array with the information requested.
+ * A DB_Error object on failure.
+ *
+ * @see DB_common::tableInfo()
+ * @since Method available since Release 1.7.0
+ */
+ function tableInfo($result = null, $mode = null)
+ {
+ if (function_exists('dbase_get_header_info')) {
+ $id = @dbase_get_header_info($this->connection);
+ if (!$id && $php_errormsg) {
+ return $this->raiseError(DB_ERROR,
+ null, null, null,
+ $php_errormsg);
+ }
+ } else {
+ /*
+ * This segment for PHP 4 is loosely based on code by
+ * Hadi Rusiah <deegos@yahoo.com> in the comments on
+ * the dBase reference page in the PHP manual.
+ */
+ $db = @fopen($this->dsn['database'], 'r');
+ if (!$db) {
+ return $this->raiseError(DB_ERROR_CONNECT_FAILED,
+ null, null, null,
+ $php_errormsg);
+ }
+
+ $id = array();
+ $i = 0;
+
+ $line = fread($db, 32);
+ while (!feof($db)) {
+ $line = fread($db, 32);
+ if (substr($line, 0, 1) == chr(13)) {
+ break;
+ } else {
+ $pos = strpos(substr($line, 0, 10), chr(0));
+ $pos = ($pos == 0 ? 10 : $pos);
+ $id[$i] = array(
+ 'name' => substr($line, 0, $pos),
+ 'type' => $this->types[substr($line, 11, 1)],
+ 'length' => ord(substr($line, 16, 1)),
+ 'precision' => ord(substr($line, 17, 1)),
+ );
+ }
+ $i++;
+ }
+
+ fclose($db);
+ }
+
+ if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
+ $case_func = 'strtolower';
+ } else {
+ $case_func = 'strval';
+ }
+
+ $res = array();
+ $count = count($id);
+
+ if ($mode) {
+ $res['num_fields'] = $count;
+ }
+
+ for ($i = 0; $i < $count; $i++) {
+ $res[$i] = array(
+ 'table' => $this->dsn['database'],
+ 'name' => $case_func($id[$i]['name']),
+ 'type' => $id[$i]['type'],
+ 'len' => $id[$i]['length'],
+ 'flags' => ''
+ );
+ if ($mode & DB_TABLEINFO_ORDER) {
+ $res['order'][$res[$i]['name']] = $i;
+ }
+ if ($mode & DB_TABLEINFO_ORDERTABLE) {
+ $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
+ }
+ }
+
+ return $res;
+ }
+
+ // }}}
+}
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ */
+
+?>
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