ceph/src/tools/rbd/IndentStream.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #ifndef CEPH_RBD_INDENT_STREAM_H
   5 #define CEPH_RBD_INDENT_STREAM_H
   6
   7 #include "include/int_types.h"
   8 #include <iostream>
   9 #include <streambuf>
  10 #include <iomanip>
  11
  12 namespace rbd {
  13
  14 class IndentBuffer : public std::streambuf {
  15 public:
  16   IndentBuffer(size_t indent, size_t initial_offset, size_t line_length,
  17                std::streambuf *streambuf)
  18     : m_indent(indent), m_initial_offset(initial_offset),
  19       m_line_length(line_length), m_streambuf(streambuf),
  20       m_delim(" "), m_indent_prefix(m_indent, ' ') {
  21   }
  22
  23   void set_delimiter(const std::string &delim) {
  24     m_delim = delim;
  25   }
  26
  27 protected:
  28   int overflow (int c) override;
  29
  30 private:
  31   size_t m_indent;
  32   size_t m_initial_offset;
  33   size_t m_line_length;
  34   std::streambuf *m_streambuf;
  35
  36   std::string m_delim;
  37   std::string m_indent_prefix;
  38   std::string m_buffer;
  39
  40   void flush_line();
  41 };
  42
  43 class IndentStream : public std::ostream {
  44 public:
  45   IndentStream(size_t indent, size_t initial_offset, size_t line_length,
  46                std::ostream &os)
  47     : std::ostream(&m_indent_buffer),
  48       m_indent_buffer(indent, initial_offset, line_length, os.rdbuf()) {
  49   }
  50
  51   void set_delimiter(const std::string &delim) {
  52     m_indent_buffer.set_delimiter(delim);
  53   }
  54 private:
  55   IndentBuffer m_indent_buffer;
  56 };
  57
  58 } // namespace rbd
  59
  60 #endif // CEPH_RBD_INDENT_STREAM_ITERATOR_H