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Yingdi Yu3168c302015-07-04 16:45:40 -07001/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2/**
3 * Copyright (c) 2013-2016 Regents of the University of California.
4 *
5 * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
6 *
7 * ndn-cxx library is free software: you can redistribute it and/or modify it under the
8 * terms of the GNU Lesser General Public License as published by the Free Software
9 * Foundation, either version 3 of the License, or (at your option) any later version.
10 *
11 * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
12 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
14 *
15 * You should have received copies of the GNU General Public License and GNU Lesser
16 * General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
17 * <http://www.gnu.org/licenses/>.
18 *
19 * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
20 */
21
22#ifndef NDN_CXX_SECURITY_TRANSFORM_STREAM_SOURCE_HPP
23#define NDN_CXX_SECURITY_TRANSFORM_STREAM_SOURCE_HPP
24
25#include "transform-base.hpp"
26#include <iostream>
27
28namespace ndn {
29namespace security {
30namespace transform {
31
32/**
33 * @brief A source taking an std::istream as input
34 */
35class StreamSource : public Source
36{
37public:
38 /**
39 * @brief Construst a source using @p is as input.
40 *
41 * @param is The input stream
42 * @param bufLen The internal buffer size. The default size is 1024.
43 * @pre bufLen must be larger than 0.
44 */
45 explicit
46 StreamSource(std::istream& is, size_t bufLen = DEFAULT_BUFFER_LEN);
47
48private:
49 /**
50 * @brief Read bytes from the input stream until EOF is reached and write them into the next module.
51 */
52 virtual void
53 doPump() final;
54
55public:
56 static const std::size_t DEFAULT_BUFFER_LEN;
57
58private:
59 std::istream& m_is;
60 size_t m_bufferSize;
61};
62
63typedef StreamSource streamSource;
64
65} // namespace transform
66} // namespace security
67} // namespace ndn
68
69#endif // NDN_CXX_SECURITY_TRANSFORM_STREAM_SOURCE_HPP