indented-stream.cpp
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2013-2018 Regents of the University of California.
4  *
5  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
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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
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13  * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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16  * General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
17  * <http://www.gnu.org/licenses/>.
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19  * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
20  */
21 
23 
24 #include <vector>
25 
26 #include <boost/range/iterator_range.hpp>
27 #include <boost/algorithm/string/split.hpp>
28 #include <boost/algorithm/string/classification.hpp>
29 
30 namespace ndn {
31 namespace util {
32 
33 IndentedStream::IndentedStream(std::ostream& os, const std::string& indent)
34  : std::ostream(&m_buffer)
35  , m_buffer(os, indent)
36 {
37 }
38 
40 {
41  flush();
42 }
43 
44 IndentedStream::StreamBuf::StreamBuf(std::ostream& os, const std::string& indent)
45  : m_output(os)
46  , m_indent(indent)
47 {
48 }
49 
50 int
51 IndentedStream::StreamBuf::sync()
52 {
53  typedef boost::iterator_range<std::string::const_iterator> StringView;
54 
55  const std::string& output = str();
56  std::vector<StringView> splitOutput;
57  boost::split(splitOutput, output, boost::is_any_of("\n"));
58 
59  if (!splitOutput.empty() && splitOutput.back().empty()) {
60  splitOutput.pop_back();
61  }
62  for (const StringView& line : splitOutput) {
63  m_output << m_indent << line << "\n";
64  }
65  str(std::string());
66  return 0; // success
67 }
68 
69 } // namespace util
70 } // namespace ndn
IndentedStream(std::ostream &os, const std::string &indent)
Definition: data.cpp:25