Function cmUVStreamRead

Source/cmUVStream.h:79–110

template <typename ReadCallback, typename FinishCallback>
std::unique_ptr<cmUVStreamReadHandle> cmUVStreamRead(uv_stream_t* stream,
                                                     ReadCallback onRead,
                                                     FinishCallback onFinish)
{
  auto handle = cm::make_unique<cmUVStreamReadHandle>();
  handle->OnRead = std::move(onRead);
  handle->OnFinish = std::move(onFinish);

  stream->data = handle.get();
  uv_read_start(
    stream,
    [](uv_handle_t* s, std::size_t suggestedSize, uv_buf_t* buffer) {
      auto* data = static_cast<cmUVStreamReadHandle*>(s->data);
      data->Buffer.resize(suggestedSize);
      buffer->base = data->Buffer.data();
      buffer->len = suggestedSize;
    },
    [](uv_stream_t* s, ssize_t nread, uv_buf_t const* buffer) {
      auto* data = static_cast<cmUVStreamReadHandle*>(s->data);
      if (nread > 0) {
        (void)buffer;
        assert(buffer->base == data->Buffer.data());
        data->Buffer.resize(nread);
        data->OnRead(std::move(data->Buffer));
      } else if (nread < 0 /*|| nread == UV_EOF*/) {
        data->OnFinish();
        uv_read_stop(s);
      }
    });

  return handle;
}