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/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   file Copyright.txt or https://cmake.org/licensing for details.  */
#pragma once

#include <istream>

#include "cmUVHandlePtr.h"
#include "cmUVStreambuf.h"

template <typename CharT, typename Traits = std::char_traits<CharT>>
class cmBasicUVIStream : public std::basic_istream<CharT>
{
public:
  cmBasicUVIStream();
  cmBasicUVIStream(uv_stream_t* stream);

  bool is_open() const;

  void open(uv_stream_t* stream);

  void close();

private:
  cmBasicUVStreambuf<CharT, Traits> Buffer;
};

template <typename CharT, typename Traits>
cmBasicUVIStream<CharT, Traits>::cmBasicUVIStream()
  : std::basic_istream<CharT, Traits>(&this->Buffer)
{
}

template <typename CharT, typename Traits>
cmBasicUVIStream<CharT, Traits>::cmBasicUVIStream(uv_stream_t* stream)
  : cmBasicUVIStream()
{
  this->open(stream);
}

template <typename CharT, typename Traits>
bool cmBasicUVIStream<CharT, Traits>::is_open() const
{
  return this->Buffer.is_open();
}

template <typename CharT, typename Traits>
void cmBasicUVIStream<CharT, Traits>::open(uv_stream_t* stream)
{
  this->Buffer.open(stream);
}

template <typename CharT, typename Traits>
void cmBasicUVIStream<CharT, Traits>::close()
{
  this->Buffer.close();
}

using cmUVIStream = cmBasicUVIStream<char>;

template <typename CharT, typename Traits = std::char_traits<CharT>>
class cmBasicUVPipeIStream : public cmBasicUVIStream<CharT, Traits>
{
public:
  cmBasicUVPipeIStream();
  cmBasicUVPipeIStream(uv_loop_t& loop, int fd);

  using cmBasicUVIStream<CharT, Traits>::is_open;

  void open(uv_loop_t& loop, int fd);

  void close();

private:
  cm::uv_pipe_ptr Pipe;
};

template <typename CharT, typename Traits>
cmBasicUVPipeIStream<CharT, Traits>::cmBasicUVPipeIStream() = default;

template <typename CharT, typename Traits>
cmBasicUVPipeIStream<CharT, Traits>::cmBasicUVPipeIStream(uv_loop_t& loop,
                                                          int fd)
{
  this->open(loop, fd);
}

template <typename CharT, typename Traits>
void cmBasicUVPipeIStream<CharT, Traits>::open(uv_loop_t& loop, int fd)
{
  this->Pipe.init(loop, 0);
  uv_pipe_open(this->Pipe, fd);
  this->cmBasicUVIStream<CharT, Traits>::open(this->Pipe);
}

template <typename CharT, typename Traits>
void cmBasicUVPipeIStream<CharT, Traits>::close()
{
  this->cmBasicUVIStream<CharT, Traits>::close();
  this->Pipe.reset();
}

using cmUVPipeIStream = cmBasicUVPipeIStream<char>;