indented-stream.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#ifndef NDN_UTIL_INDENTED_STREAM_HPP
#define NDN_UTIL_INDENTED_STREAM_HPP

#include <ostream>
#include <sstream>
#include <string>

namespace ndn {
namespace util {

class IndentedStream : public std::ostream
{
public:
  IndentedStream(std::ostream& os, const std::string& indent);

  virtual
  ~IndentedStream() override;

private:
  // Write a stream buffer that prefixes each line
  class StreamBuf : public std::stringbuf
  {
  public:
    StreamBuf(std::ostream& os, const std::string& indent);

    virtual int
    sync() override;

  private:
    std::ostream& m_output;
    std::string m_indent;
  };

  StreamBuf m_buffer;
};

} // namespace util
} // namespace ndn

#endif // NDN_UTIL_INDENTED_STREAM_HPP