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/*
* Copyright 2003-2020 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_PEEK_READER_HXX
#define MPD_PEEK_READER_HXX
#include "Reader.hxx"
#include <cstdint>
/**
* A filter that allows the caller to peek the first few bytes without
* consuming them. The first call must be Peek(), and the following
* Read() will deliver the same bytes again.
*/
class PeekReader final : public Reader {
Reader &next;
size_t buffer_size = 0, buffer_position = 0;
uint8_t buffer[64];
public:
explicit PeekReader(Reader &_next)
:next(_next) {}
const void *Peek(size_t size);
/* virtual methods from class Reader */
size_t Read(void *data, size_t size) override;
};
#endif
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