1 /* Copyright 2016, Ableton AG, Berlin. All rights reserved.
2  *
3  *  This program is free software: you can redistribute it and/or modify
4  *  it under the terms of the GNU General Public License as published by
5  *  the Free Software Foundation, either version 2 of the License, or
6  *  (at your option) any later version.
7  *
8  *  This program is distributed in the hope that it will be useful,
9  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
10  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  *  GNU General Public License for more details.
12  *
13  *  You should have received a copy of the GNU General Public License
14  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
15  *
16  *  If you would like to incorporate Link into a proprietary software application,
17  *  please contact <link-devs@ableton.com>.
18  */
19 
20 #pragma once
21 
22 #include <ableton/discovery/NetworkByteStreamSerializable.hpp>
23 #include <algorithm>
24 #include <array>
25 #include <cstdint>
26 #include <random>
27 #include <string>
28 
29 namespace ableton
30 {
31 namespace link
32 {
33 
34 using NodeIdArray = std::array<std::uint8_t, 8>;
35 
36 struct NodeId : NodeIdArray
37 {
38   NodeId() = default;
39 
NodeIdableton::link::NodeId40   NodeId(NodeIdArray rhs)
41     : NodeIdArray(std::move(rhs))
42   {
43   }
44 
randomableton::link::NodeId45   static NodeId random()
46   {
47     using namespace std;
48 
49     random_device rd;
50     mt19937 gen(rd());
51     // uint8_t not standardized for this type - use unsigned
52     uniform_int_distribution<unsigned> dist(33, 126); // printable ascii chars
53 
54     NodeId nodeId;
55     generate(
56       nodeId.begin(), nodeId.end(), [&] { return static_cast<uint8_t>(dist(gen)); });
57     return nodeId;
58   }
59 
operator <<(std::ostream & stream,const NodeId & id)60   friend std::ostream& operator<<(std::ostream& stream, const NodeId& id)
61   {
62     return stream << std::string{id.cbegin(), id.cend()};
63   }
64 
65   template <typename It>
toNetworkByteStream(const NodeId & nodeId,It out)66   friend It toNetworkByteStream(const NodeId& nodeId, It out)
67   {
68     return discovery::toNetworkByteStream(nodeId, std::move(out));
69   }
70 
71   template <typename It>
fromNetworkByteStreamableton::link::NodeId72   static std::pair<NodeId, It> fromNetworkByteStream(It begin, It end)
73   {
74     using namespace std;
75     auto result =
76       discovery::Deserialize<NodeIdArray>::fromNetworkByteStream(move(begin), move(end));
77     return make_pair(NodeId(move(result.first)), move(result.second));
78   }
79 };
80 
81 } // namespace link
82 } // namespace ableton
83