50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
/*
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* Copyright 2003-2022 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_PEEK_READER_HXX
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#define MPD_PEEK_READER_HXX
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#include "Reader.hxx"
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#include <cstdint>
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/**
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* A filter that allows the caller to peek the first few bytes without
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* consuming them. The first call must be Peek(), and the following
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* Read() will deliver the same bytes again.
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*/
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class PeekReader final : public Reader {
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Reader &next;
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size_t buffer_size = 0, buffer_position = 0;
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uint8_t buffer[64];
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public:
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explicit PeekReader(Reader &_next)
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:next(_next) {}
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const void *Peek(size_t size);
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/* virtual methods from class Reader */
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size_t Read(void *data, size_t size) override;
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};
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#endif
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