MPD  0.20.18
PeekReader.hxx
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1 /*
2  * Copyright 2003-2017 The Music Player Daemon Project
3  * http://www.musicpd.org
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
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9  *
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12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
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18  */
19 
20 #ifndef MPD_PEEK_READER_HXX
21 #define MPD_PEEK_READER_HXX
22 
23 #include "check.h"
24 #include "Reader.hxx"
25 #include "Compiler.h"
26 
27 #include <stdint.h>
28 
34 class PeekReader final : public Reader {
35  Reader &next;
36 
37  size_t buffer_size = 0, buffer_position = 0;
38 
39  uint8_t buffer[64];
40 
41 public:
42  explicit PeekReader(Reader &_next)
43  :next(_next) {}
44 
45  const void *Peek(size_t size);
46 
47  /* virtual methods from class Reader */
48  virtual size_t Read(void *data, size_t size) override;
49 };
50 
51 #endif
An interface that can read bytes from a stream until the stream ends.
Definition: Reader.hxx:35
PeekReader(Reader &_next)
Definition: PeekReader.hxx:42
virtual size_t Read(void *data, size_t size) override
Read data from the stream.
const void * Peek(size_t size)
A filter that allows the caller to peek the first few bytes without consuming them.
Definition: PeekReader.hxx:34