/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2011 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Manuel Requena <manuel.requena@cttc.es>
 * Author: Marco Miozzo <marco.miozzo@cttc.es>
 */

#include "lte-common.h"
#include <ns3/log.h>
#include <ns3/abort.h>

NS_LOG_COMPONENT_DEFINE ("LteCommon");

namespace ns3 {


LteFlowId_t::LteFlowId_t ()
{
}

LteFlowId_t::LteFlowId_t (const uint16_t a, const uint8_t b)
  : m_rnti (a),
    m_lcId (b)
{
}

bool
operator == (const LteFlowId_t &a, const LteFlowId_t &b)
{
  return ( (a.m_rnti == b.m_rnti) && (a.m_lcId == b.m_lcId) );
}

bool
operator < (const LteFlowId_t& a, const LteFlowId_t& b)
{
  return ( (a.m_rnti < b.m_rnti) || ( (a.m_rnti == b.m_rnti) && (a.m_lcId < b.m_lcId) ) );
}

ImsiLcidPair_t::ImsiLcidPair_t ()
{
}

ImsiLcidPair_t::ImsiLcidPair_t (const uint64_t a, const uint8_t b)
  : m_imsi (a),
    m_lcId (b)
{
}

bool
operator == (const ImsiLcidPair_t &a, const ImsiLcidPair_t &b)
{
  return ((a.m_imsi == b.m_imsi) && (a.m_lcId == b.m_lcId));
}

bool
operator < (const ImsiLcidPair_t& a, const ImsiLcidPair_t& b)
{
  return ((a.m_imsi < b.m_imsi) || ((a.m_imsi == b.m_imsi) && (a.m_lcId
                                                               < b.m_lcId)));
}


uint16_t
LteFfConverter::double2fpS11dot3 (double val)
{
  // convert from double to fixed point notation Sxxxxxxxxxxx.xxx
  // truncate val to notation limits
  if (val > 4095.88) val = 4095.88;
  if (val < -4096) val = -4096;
  int16_t valFp = (int16_t)(val * pow (2, 3));
  return (valFp);
}

double
LteFfConverter::fpS11dot3toDouble (uint16_t val)
{
  // convert from fixed point notation Sxxxxxxxxxxx.xxx to double
  double valD = ((int16_t)val) / pow (2, 3);
  return (valD);
}

double 
LteFfConverter::getMinFpS11dot3Value ()
{
  return (-4096);        // -4096 = 0x8000 = 1000 0000 0000 0000 b
}

//static double g_lowestFpS11dot3Value = -4096; // 0x8001 (1000 0000 0000 0000)


uint32_t BufferSizeLevelBsrTable[64] = {
  
  0, 10, 12, 14, 17, 19, 22, 26, 31, 36, 42, 49, 57, 67, 78, 91, 
  107, 125, 146, 171, 200, 234, 274, 321, 376, 440, 515, 603, 
  706, 826, 967, 1132, 1326, 1552, 1817, 2127, 2490, 2915, 3413,
  3995, 4677, 5476, 6411, 7505, 8787, 10287, 12043, 14099, 16507,
  19325, 22624, 26487, 31009, 36304, 42502, 49759, 58255,
  68201, 79846, 93749, 109439, 128125, 150000, 150000
  
};

uint32_t
BufferSizeLevelBsr::BsrId2BufferSize (uint8_t val)
{
  NS_ABORT_MSG_UNLESS (val >= 0 && val < 64, "val = " << val << " is out of range");
  return BufferSizeLevelBsrTable[val];
}

uint8_t
BufferSizeLevelBsr::BufferSize2BsrId (uint32_t val)
{
  int index = 0;
  if (BufferSizeLevelBsrTable[63] < val)
    {
      index = 63;
    }
  else
    {
      while (BufferSizeLevelBsrTable[index] < val)
        {
          NS_ASSERT (index < 64);
          index++;
        }
    }
    
  return (index);
}


}; // namespace ns3