indented-stream.hpp
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2013-2021 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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21 
22 #ifndef NDN_CXX_UTIL_INDENTED_STREAM_HPP
23 #define NDN_CXX_UTIL_INDENTED_STREAM_HPP
24 
25 #include <ostream>
26 #include <sstream>
27 #include <string>
28 
29 namespace ndn {
30 namespace util {
31 
54 class IndentedStream : public std::ostream
55 {
56 public:
57  IndentedStream(std::ostream& os, const std::string& indent);
58 
59  ~IndentedStream() override;
60 
61 private:
62  // Write a stream buffer that prefixes each line
63  class StreamBuf : public std::stringbuf
64  {
65  public:
66  StreamBuf(std::ostream& os, const std::string& indent);
67 
68  int
69  sync() override;
70 
71  private:
72  std::ostream& m_output;
73  std::string m_indent;
74  };
75 
76  StreamBuf m_buffer;
77 };
78 
79 } // namespace util
80 } // namespace ndn
81 
82 #endif // NDN_CXX_UTIL_INDENTED_STREAM_HPP
Output to stream with specified indent or prefix.
IndentedStream(std::ostream &os, const std::string &indent)
Definition: data.cpp:25