.. _program_listing_file_falcon_streamports.cpp:

Program Listing for File streamports.cpp
========================================

|exhale_lsh| :ref:`Return to documentation for file <file_falcon_streamports.cpp>` (``falcon/streamports.cpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // ---------------------------------------------------------------------
   // This file is part of falcon-core.
   //
   // Copyright (C) 2015, 2016, 2017 Neuro-Electronics Research Flanders
   //
   // Falcon-server is free software: you can redistribute it and/or modify
   // it under the terms of the GNU General Public License as published by
   // the Free Software Foundation, either version 3 of the License, or
   // (at your option) any later version.
   //
   // Falcon-server is distributed in the hope that it will be useful,
   // but WITHOUT ANY WARRANTY; without even the implied warranty of
   // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   // GNU General Public License for more details.
   //
   // You should have received a copy of the GNU General Public License
   // along with falcon-core. If not, see <http://www.gnu.org/licenses/>.
   // ---------------------------------------------------------------------
   
   #include "streamports.hpp"
   
   int IdentifyNextSlot(int slot_request, int connected_slot_number,
                        bool allow_multi_connect, const PortPolicy &policy) {
     if (slot_request >= policy.max_slot_number()) {
       return -1;
     }
   
     // auto select first available slot
     if (slot_request < 0) {
       if (allow_multi_connect) {
         return connected_slot_number % policy.max_slot_number();
       } else if (connected_slot_number < policy.max_slot_number()) {
         return connected_slot_number;
       } else {
         return -1;
       }
     }
   
     // requested already connected slot
     if (slot_request < connected_slot_number) {
       if (allow_multi_connect) {
         return slot_request;
       } else {
         return -1;
       }
     }
   
     if (slot_request < policy.min_slot_number()) {
       return slot_request;
     }
   
     if (slot_request >= policy.min_slot_number() &&
         slot_request == connected_slot_number) {
       return slot_request;
     }
   
     return -1;
   }