NS-3 based Named Data Networking (NDN) simulator
ndnSIM: NDN, CCN, CCNx, content centric networks
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non-negative-integer-visitor.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 "non-negative-integer-visitor.h"
22 
23 #include "../syntax-tree/blob.h"
24 #include "../syntax-tree/udata.h"
25 #include <sstream>
26 
27 NDN_NAMESPACE_BEGIN
28 
29 namespace wire {
30 namespace CcnbParser {
31 
32 boost::any
33 NonNegativeIntegerVisitor::visit (Blob &n) //to throw parsing error
34 {
35  // Buffer n.m_blob;
36  throw CcnbDecodingException ();
37 }
38 
39 boost::any
40 NonNegativeIntegerVisitor::visit (Udata &n)
41 {
42  // std::string n.m_udata;
43  std::istringstream is (n.m_udata);
44  int32_t value;
45  is >> value;
46  if (value<0) // value should be non-negative
47  throw CcnbDecodingException ();
48 
49  return static_cast<uint32_t> (value);
50 }
51 
52 } // CcnbParser
53 } // wire
54 
55 NDN_NAMESPACE_END
Exception thrown if there is a parsing error.
Definition: common.h:50
std::string m_udata
field holding a parsed UDATA value of the block
Definition: udata.h:54
Class to represent BLOB ccnb-encoded node.
Definition: blob.h:37
Class to represent UDATA ccnb-encoded node.
Definition: udata.h:36