#ifndef STREAM_H_62B23520_7C8E_11DE_8A39_0800200C9A66

#define STREAM_H_62B23520_7C8E_11DE_8A39_0800200C9A66

#if defined(_MSC_VER) ||                                            \

    (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || \

     (__GNUC__ >= 4))  // GCC supports "pragma once" correctly since 3.4

#pragma once

#endif

#include "yaml-cpp/mark.h"

#include <cstddef>

#include <deque>

#include <ios>

#include <iostream>

#include <set>

#include <string>

namespace YAML {

class StreamCharSource;

class Stream {

 public:

  friend class StreamCharSource;

  Stream(std::istream& input);

  Stream(const Stream&) = delete;

  Stream(Stream&&) = delete;

  Stream& operator=(const Stream&) = delete;

  Stream& operator=(Stream&&) = delete;

  ~Stream();

  operator bool() const;

  bool operator!() const { return !static_cast<bool>(*this); }

  char peek() const;

  char get();

  std::string get(int n);

  void eat(int n = 1);

  static char eof() { return 0x04; }

  const Mark mark() const { return m_mark; }

  int pos() const { return m_mark.pos; }

  int line() const { return m_mark.line; }

  int column() const { return m_mark.column; }

  void ResetColumn() { m_mark.column = 0; }

 private:

  enum CharacterSet { utf8, utf16le, utf16be, utf32le, utf32be };

  std::istream& m_input;

  Mark m_mark;

  CharacterSet m_charSet;

  mutable std::deque<char> m_readahead;

  unsigned char* const m_pPrefetched;

  mutable size_t m_nPrefetchedAvailable;

  mutable size_t m_nPrefetchedUsed;

  void AdvanceCurrent();

  char CharAt(size_t i) const;

  bool ReadAheadTo(size_t i) const;

  bool _ReadAheadTo(size_t i) const;

  void StreamInUtf8() const;

  void StreamInUtf16() const;

  void StreamInUtf32() const;

  unsigned char GetNextByte() const;

};

// CharAt

// . Unchecked access

inline char Stream::CharAt(size_t i) const { return m_readahead[i]; }

inline bool Stream::ReadAheadTo(size_t i) const {

  if (m_readahead.size() > i)

    return true;

  return _ReadAheadTo(i);

}

}  // namespace YAML

#endif  // STREAM_H_62B23520_7C8E_11DE_8A39_0800200C9A66