From 09b84c51ee1671e770062bf6148ad65afee6073a Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Thu, 15 May 2014 22:16:26 +0200 Subject: input/rewind: move code to class ProxyInputStream --- src/input/ProxyInputStream.hxx | 64 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 src/input/ProxyInputStream.hxx (limited to 'src/input/ProxyInputStream.hxx') diff --git a/src/input/ProxyInputStream.hxx b/src/input/ProxyInputStream.hxx new file mode 100644 index 000000000..b2049fbc0 --- /dev/null +++ b/src/input/ProxyInputStream.hxx @@ -0,0 +1,64 @@ +/* + * Copyright (C) 2003-2014 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_PROXY_INPUT_STREAM_HXX +#define MPD_PROXY_INPUT_STREAM_HXX + +#include "InputStream.hxx" + +struct Tag; + +/** + * An #InputStream that forwards all methods call to another + * #InputStream instance. This can be used as a base class to + * override selected methods. + */ +class ProxyInputStream : public InputStream { +protected: + InputStream &input; + +public: + gcc_nonnull_all + ProxyInputStream(InputStream *_input); + + virtual ~ProxyInputStream(); + + ProxyInputStream(const ProxyInputStream &) = delete; + ProxyInputStream &operator=(const ProxyInputStream &) = delete; + + /* virtual methods from InputStream */ + bool Check(Error &error) override; + void Update() override; + bool Seek(offset_type new_offset, int whence, Error &error) override; + bool IsEOF() override; + Tag *ReadTag() override; + bool IsAvailable() override; + size_t Read(void *ptr, size_t read_size, Error &error) override; + +protected: + /** + * Copy public attributes from the underlying input stream to the + * "rewind" input stream. This function is called when a method of + * the underlying stream has returned, which may have modified these + * attributes. + */ + void CopyAttributes(); +}; + +#endif -- cgit v1.2.3