NS-3 based Named Data Networking (NDN) simulator
ndnSIM: NDN, CCN, CCNx, content centric networks
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tag.cc
1 /* -*- 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 "tag.h"
22 
23 #include "base-attr.h"
24 
25 NDN_NAMESPACE_BEGIN
26 
27 namespace wire {
28 namespace CcnbParser {
29 
30 Tag::Tag (Buffer::Iterator &start, uint32_t length)
31 {
32  m_tag.reserve (length+2); // extra byte for potential \0 at the end
33  uint32_t i = 0;
34  for (; !start.IsEnd () && i < (length+1); i++)
35  {
36  m_tag.push_back (start.ReadU8 ());
37  }
38  if (i < (length+1) && start.IsEnd ())
39  throw CcnbDecodingException ();
40 
41  // parse attributes until first nested block reached
42  while (!start.IsEnd () && BufferIteratorPeekU8 (start)!=CCN_CLOSE)
43  {
44  Ptr<Block> block = Block::ParseBlock (start);
45  if (DynamicCast<BaseAttr> (block)!=0)
46  m_attrs.push_back (block);
47  else
48  {
49  m_nestedTags.push_back (block);
50  break;
51  }
52  }
53 
54  // parse the rest of nested blocks
55  while (!start.IsEnd () && BufferIteratorPeekU8 (start)!=CCN_CLOSE)
56  {
57  Ptr<Block> block = Block::ParseBlock (start);
58  m_nestedTags.push_back (block);
59  }
60 
61  if (start.IsEnd ()) //should not be the end
62  throw CcnbDecodingException ();
63 
64  start.ReadU8 (); // read CCN_CLOSE
65 }
66 
67 } // namespace CcnbParser
68 } // namespace wire
69 
70 NDN_NAMESPACE_END
Exception thrown if there is a parsing error.
Definition: common.h:50