libsidplayfp  1.4.0
NullSid.h
1 /*
2  * This file is part of libsidplayfp, a SID player engine.
3  *
4  * Copyright 2012-2013 Leandro Nini <drfiemost@users.sourceforge.net>
5  * Copyright 2010 Antti Lankila
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20  */
21 
22 #ifndef NULLSID_H
23 #define NULLSID_H
24 
25 #include "sidplayfp/c64/c64sid.h"
26 
30 class NullSid : public c64sid
31 {
32 private:
33  NullSid() {}
34  virtual ~NullSid() {}
35 
36 public:
38  static NullSid *getInstance()
39  {
40  static NullSid nullsid;
41  return &nullsid;
42  }
43 
44  void reset(uint8_t) {}
45 
46  void poke(uint_least16_t address SID_UNUSED, uint8_t value SID_UNUSED) {}
47  uint8_t peek(uint_least16_t address SID_UNUSED) { return 0xff; }
48 };
49 
50 #endif // NULLSID_H
static NullSid * getInstance()
Returns singleton instance.
Definition: NullSid.h:38
Definition: NullSid.h:30
void poke(uint_least16_t address SID_UNUSED, uint8_t value SID_UNUSED)
Definition: NullSid.h:46
Definition: c64sid.h:31
uint8_t peek(uint_least16_t address SID_UNUSED)
Definition: NullSid.h:47