input/MaybeBuffered: proxy InputStream implementation which auto-uses BufferedInputStream

src/input/MaybeBufferedInputStream.hxx

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2003-2018 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_MAYBE_BUFFERED_INPUT_STREAM_BUFFER_HXX
+#define MPD_MAYBE_BUFFERED_INPUT_STREAM_BUFFER_HXX
+
+#include "check.h"
+#include "ProxyInputStream.hxx"
+
+/**
+ * A proxy which automatically inserts #BufferedInputStream once the
+ * input becomes ready and is "eligible" (see
+ * BufferedInputStream::IsEligible()).
+ */
+class MaybeBufferedInputStream final : public ProxyInputStream {
+public:
+	explicit MaybeBufferedInputStream(InputStreamPtr _input) noexcept;
+
+	/* virtual methods from class InputStream */
+	void Update() noexcept override;
+};
+
+#endif