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/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2011 University of California, Los Angeles
*
* 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: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
*/
#include "ccnb-parser-timestamp-visitor.h"
#include "../syntax-tree/ccnb-parser-blob.h"
#include "ns3/nstime.h"
namespace ns3 {
namespace CcnbParser {
boost::any/*Time*/
TimestampVisitor::visit (Blob &n)
{
// Buffer n.m_blob;
if (n.m_blobSize < 2)
throw CcnbDecodingException ();
const char *start = n.m_blob;
intmax_t seconds = 0;
intmax_t nanoseconds = 0;
for (uint32_t i=0; i < n.m_blobSize-2; i++)
{
seconds = (seconds << 8) | (uint8_t)start[i];
}
uint8_t combo = start[n.m_blobSize-2]; // 4 most significant bits hold 4 least significant bits of number of seconds
seconds = (seconds << 4) | (combo >> 4);
nanoseconds = combo & 0x0F; /*00001111*/ // 4 least significant bits hold 4 most significant bits of number of
nanoseconds = (nanoseconds << 8) | start[n.m_blobSize-1];
nanoseconds = (intmax_t) ((nanoseconds / 4096.0/*2^12*/) * 1000000 /*up-convert useconds*/);
return boost::any (Time::FromInteger (seconds, Time::S) + Time::FromInteger (nanoseconds, Time::US));
}
boost::any
TimestampVisitor::visit (Udata &n)
{
// std::string n.m_udata;
throw CcnbDecodingException ();
}
}
}