text: /***************************************************************************
   *   Copyright (C) 2007 by Sindre Aamås                                    *
   *   aamas@stud.ntnu.no                                                    *
   *                                                                         *
   *   This program is free software; you can redistribute it and/or modify  *
   *   it under the terms of the GNU General Public License version 2 as     *
   *   published by the Free Software Foundation.                            *
   *                                                                         *
   *   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 version 2 for more details.                *
   *                                                                         *
   *   You should have received a copy of the GNU General Public License     *
   *   version 2 along with this program; if not, write to the               *
   *   Free Software Foundation, Inc.,                                       *
   *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
   ***************************************************************************/
  #ifndef RTC_H
  #define RTC_H
  
  #include <cstdint>
  #include "newstate.h"
  
  namespace gambatte {
  
  struct SaveState;
  
  class Rtc {
  private:
  	unsigned char *activeData;
  	void (Rtc::*activeSet)(unsigned);
  	std::uint32_t baseTime;
  	std::uint32_t haltTime;
  	unsigned char index;
  	unsigned char dataDh;
  	unsigned char dataDl;
  	unsigned char dataH;
  	unsigned char dataM;
  	unsigned char dataS;
  	bool enabled;
  	bool lastLatchData;
  	std::uint32_t (*timeCB)();
  	
  	void doLatch();
  	void doSwapActive();
  	void setDh(unsigned new_dh);
  	void setDl(unsigned new_lowdays);
  	void setH(unsigned new_hours);
  	void setM(unsigned new_minutes);
  	void setS(unsigned new_seconds);
  	
  public:
  	Rtc();
  	
  	const unsigned char* getActive() const { return activeData; }
  	std::uint32_t getBaseTime() const { return baseTime; }
  	
  	void setBaseTime(const std::uint32_t baseTime) {
  		this->baseTime = baseTime;
  // 		doLatch();
  	}
  	
  	void latch(const unsigned data) {
  		if (!lastLatchData && data == 1)
  			doLatch();
  		
  		lastLatchData = data;
  	}
  	
  	void loadState(const SaveState &state);
  	
  	void set(const bool enabled, unsigned bank) {
  		bank &= 0xF;
  		bank -= 8;
  		
  		this->enabled = enabled;
  		this->index = bank;
  		
  		doSwapActive();
  	}
  	
  	void write(const unsigned data) {
  // 		if (activeSet)
  		(this->*activeSet)(data);
  		*activeData = data;
  	}
  
  	void setRTCCallback(std::uint32_t (*callback)()) {
  		timeCB = callback;
  	}
  
  	template<bool isReader>void SyncState(NewState *ns);
  };
  
  }
  
  #endif
  