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<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2016, British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package     CodeIgniter
 * @author      EllisLab Dev Team
 * @copyright   Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
 * @copyright   Copyright (c) 2014 - 2016, British Columbia Institute of Technology (http://bcit.ca/)
 * @license     http://opensource.org/licenses/MIT      MIT License
 * @link        https://codeigniter.com
 * @since       Version 1.3.0
 * @filesource
 */
defined('BASEPATH') OR exit('No direct script access allowed');

/**
 * ODBC Result Class
 *
 * This class extends the parent result class: CI_DB_result
 *
 * @package             CodeIgniter
 * @subpackage  Drivers
 * @category    Database
 * @author              EllisLab Dev Team
 * @link                https://codeigniter.com/user_guide/database/
 */
class CI_DB_odbc_result extends CI_DB_result {

        /**
         * Number of rows in the result set
         *
         * @return      int
         */
        public function num_rows()
        {
                if (is_int($this->num_rows))
                {
                        return $this->num_rows;
                }
                elseif (($this->num_rows = odbc_num_rows($this->result_id)) !== -1)
                {
                        return $this->num_rows;
                }

                // Work-around for ODBC subdrivers that don't support num_rows()
                if (count($this->result_array) > 0)
                {
                        return $this->num_rows = count($this->result_array);
                }
                elseif (count($this->result_object) > 0)
                {
                        return $this->num_rows = count($this->result_object);
                }

                return $this->num_rows = count($this->result_array());
        }

        // --------------------------------------------------------------------

        /**
         * Number of fields in the result set
         *
         * @return      int
         */
        public function num_fields()
        {
                return odbc_num_fields($this->result_id);
        }

        // --------------------------------------------------------------------

        /**
         * Fetch Field Names
         *
         * Generates an array of column names
         *
         * @return      array
         */
        public function list_fields()
        {
                $field_names = array();
                $num_fields = $this->num_fields();

                if ($num_fields > 0)
                {
                        for ($i = 1; $i <= $num_fields; $i++)
                        {
                                $field_names[] = odbc_field_name($this->result_id, $i);
                        }
                }

                return $field_names;
        }

        // --------------------------------------------------------------------

        /**
         * Field data
         *
         * Generates an array of objects containing field meta-data
         *
         * @return      array
         */
        public function field_data()
        {
                $retval = array();
                for ($i = 0, $odbc_index = 1, $c = $this->num_fields(); $i < $c; $i++, $odbc_index++)
                {
                        $retval[$i]                     = new stdClass();
                        $retval[$i]->name               = odbc_field_name($this->result_id, $odbc_index);
                        $retval[$i]->type               = odbc_field_type($this->result_id, $odbc_index);
                        $retval[$i]->max_length         = odbc_field_len($this->result_id, $odbc_index);
                        $retval[$i]->primary_key        = 0;
                        $retval[$i]->default            = '';
                }

                return $retval;
        }

        // --------------------------------------------------------------------

        /**
         * Free the result
         *
         * @return      void
         */
        public function free_result()
        {
                if (is_resource($this->result_id))
                {
                        odbc_free_result($this->result_id);
                        $this->result_id = FALSE;
                }
        }

        // --------------------------------------------------------------------

        /**
         * Result - associative array
         *
         * Returns the result set as an array
         *
         * @return      array
         */
        protected function _fetch_assoc()
        {
                return odbc_fetch_array($this->result_id);
        }

        // --------------------------------------------------------------------

        /**
         * Result - object
         *
         * Returns the result set as an object
         *
         * @param       string  $class_name
         * @return      object
         */
        protected function _fetch_object($class_name = 'stdClass')
        {
                $row = odbc_fetch_object($this->result_id);

                if ($class_name === 'stdClass' OR ! $row)
                {
                        return $row;
                }

                $class_name = new $class_name();
                foreach ($row as $key => $value)
                {
                        $class_name->$key = $value;
                }

                return $class_name;
        }

}

// --------------------------------------------------------------------

if ( ! function_exists('odbc_fetch_array'))
{
        /**
         * ODBC Fetch array
         *
         * Emulates the native odbc_fetch_array() function when
         * it is not available (odbc_fetch_array() requires unixODBC)
         *
         * @param       resource        &$result
         * @param       int             $rownumber
         * @return      array
         */
        function odbc_fetch_array(&$result, $rownumber = 1)
        {
                $rs = array();
                if ( ! odbc_fetch_into($result, $rs, $rownumber))
                {
                        return FALSE;
                }

                $rs_assoc = array();
                foreach ($rs as $k => $v)
                {
                        $field_name = odbc_field_name($result, $k+1);
                        $rs_assoc[$field_name] = $v;
                }

                return $rs_assoc;
        }
}

// --------------------------------------------------------------------

if ( ! function_exists('odbc_fetch_object'))
{
        /**
         * ODBC Fetch object
         *
         * Emulates the native odbc_fetch_object() function when
         * it is not available.
         *
         * @param       resource        &$result
         * @param       int             $rownumber
         * @return      object
         */
        function odbc_fetch_object(&$result, $rownumber = 1)
        {
                $rs = array();
                if ( ! odbc_fetch_into($result, $rs, $rownumber))
                {
                        return FALSE;
                }

                $rs_object = new stdClass();
                foreach ($rs as $k => $v)
                {
                        $field_name = odbc_field_name($result, $k+1);
                        $rs_object->$field_name = $v;
                }

                return $rs_object;
        }
}