cmUVPipeIStream: Add cmUVPipeIStream

Source/CMakeLists.txt

@@ -438,6 +438,7 @@ add_library(
   cmUVHandlePtr.h
   cmUVProcessChain.cxx
   cmUVProcessChain.h
+  cmUVStream.h
   cmUVStreambuf.h
   cmUVSignalHackRAII.h
   cmVariableWatch.cxx

Source/cmUVStream.h

@@ -0,0 +1,102 @@
+/* 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>;