blob: ea4ab00a592f99fe8bd3e2dde21839a2ff084a21 [file] [log] [blame]
Alexander Afanasyevf21c5be2011-08-22 00:35:54 -07001/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
2/*
3 * Copyright (c) 2011 University of California, Los Angeles
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation;
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
19 */
20
21#include "ccnb-parser-timestamp-visitor.h"
22#include "ns3/ccnb-parser-blob.h"
23
24#include "ns3/nstime.h"
25
26namespace ns3 {
27namespace CcnbParser {
28
29boost::any/*Time*/
30TimestampVisitor::visit (Blob &n)
31{
32 // Buffer n.m_blob;
Alexander Afanasyev85a3bca2011-08-31 16:51:03 -070033 if (n.m_blobSize < 2)
Alexander Afanasyevf21c5be2011-08-22 00:35:54 -070034 throw CcnbDecodingException ();
35
Alexander Afanasyev85a3bca2011-08-31 16:51:03 -070036 const char *start = n.m_blob;
Alexander Afanasyevf21c5be2011-08-22 00:35:54 -070037
38 intmax_t seconds = 0;
39 intmax_t nanoseconds = 0;
40
Alexander Afanasyev85a3bca2011-08-31 16:51:03 -070041 for (uint32_t i=0; i < n.m_blobSize-2; i++)
Alexander Afanasyevf21c5be2011-08-22 00:35:54 -070042 {
Alexander Afanasyev85a3bca2011-08-31 16:51:03 -070043 seconds = (seconds << 8) | (uint8_t)start[i];
Alexander Afanasyevf21c5be2011-08-22 00:35:54 -070044 }
Alexander Afanasyev85a3bca2011-08-31 16:51:03 -070045 uint8_t combo = start[n.m_blobSize-2]; // 4 most significant bits hold 4 least significant bits of number of seconds
46 seconds = (seconds << 4) | (combo >> 4);
Alexander Afanasyevf21c5be2011-08-22 00:35:54 -070047
48 nanoseconds = combo & 0x0F; /*00001111*/ // 4 least significant bits hold 4 most significant bits of number of
Alexander Afanasyev85a3bca2011-08-31 16:51:03 -070049 nanoseconds = (nanoseconds << 8) | start[n.m_blobSize-1];
50 nanoseconds = (intmax_t) ((nanoseconds / 4096.0/*2^12*/) * 1000000 /*up-convert useconds*/);
Alexander Afanasyevf21c5be2011-08-22 00:35:54 -070051
Alexander Afanasyev85a3bca2011-08-31 16:51:03 -070052 return boost::any (Time::FromInteger (seconds, Time::S) + Time::FromInteger (nanoseconds, Time::US));
Alexander Afanasyevf21c5be2011-08-22 00:35:54 -070053}
54
55boost::any
56TimestampVisitor::visit (Udata &n)
57{
58 // std::string n.m_udata;
59 throw CcnbDecodingException ();
60}
61
62}
63}