/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2006 INRIA

 *

 * 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: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

 */

#include "ssid.h"

#include "ns3/assert.h"

#define ELEMENT_ID (0)

namespace ns3 {

Ssid::Ssid ()

{

  m_length = 0;

  for (uint8_t i = 0; i < 33; i++) 

    {

      m_ssid[i] = 0;

    }

}

Ssid::Ssid (char const *ssid)

{

  uint8_t len = 0;

  while (*ssid != 0 && len < 32) 

    {

      m_ssid[len] = *ssid;

      ssid++;

      len++;

    }

  NS_ASSERT (len <= 32);

  m_length = len;

  while (len < 33) 

    {

      m_ssid[len] = 0;

      len++;

    }

}

Ssid::Ssid (char const ssid[32], uint8_t length)

{

  NS_ASSERT (length <= 32);

  uint8_t len = 0;

  while (len < length) 

    {

      m_ssid[len] = ssid[len];

      len++;

    }

  m_length = length;

  while (len < 33) 

    {

      m_ssid[len] = 0;

      len++;

    }

}

bool 

Ssid::IsEqual (Ssid const &o) const

{

  uint8_t i = 0;

  while (i < 32 && 

         m_ssid[i] == o.m_ssid[i] &&

         m_ssid[i] != 0) 

    {

      i++;

    }

  if (m_ssid[i] != o.m_ssid[i]) 

    {

      return false;

    }

  return true;

}

bool 

Ssid::IsBroadcast (void) const

{

  if (m_ssid[0] == 0) 

    {

      return true;

    }

  return false;

}

uint32_t 

Ssid::GetLength (void) const

{

  uint8_t size = 0;

  while (m_ssid[size] != 0 && size < 32) 

    {

      size++;

    }

  NS_ASSERT (size <= 32);

  return size;

}

char *

Ssid::PeekString (void) const

{

  // it is safe to return a pointer to the buffer because it is

  // guaranteed to be zero-terminated.

  return (char *)m_ssid;

}

uint32_t 

Ssid::GetSerializedSize (void) const

{

  return 1 + 1 + m_length;

}

Buffer::Iterator 

Ssid::Serialize (Buffer::Iterator i) const

{

  NS_ASSERT (m_length <= 32);

  i.WriteU8 (ELEMENT_ID);

  i.WriteU8 (m_length);

  i.Write (m_ssid, m_length);

  return i;

}

Buffer::Iterator 

Ssid::Deserialize (Buffer::Iterator i)

{

  uint8_t elementId;

  elementId = i.ReadU8 ();

  NS_ASSERT (elementId == ELEMENT_ID);

  m_length = i.ReadU8 ();

  NS_ASSERT (m_length <= 32);

  i.Read (m_ssid, m_length);

  return i;

}

std::ostream &

operator << (std::ostream &os, const Ssid &ssid)

{

  os << ssid.PeekString ();

  return os;

}

} // namespace ns3