www.pudn.com > Nestopia137src.zip > NstApiMachine.cpp

//////////////////////////////////////////////////////////////////////////////////////// 
// 
// Nestopia - NES/Famicom emulator written in C++ 
// 
// Copyright (C) 2003-2007 Martin Freij 
// 
// This file is part of Nestopia. 
// 
// Nestopia 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. 
// 
// Nestopia 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 Nestopia; if not, write to the Free Software 
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
// 
//////////////////////////////////////////////////////////////////////////////////////// 
 
#include  
#include "../NstMachine.hpp" 
#include "../NstImage.hpp" 
#include "../NstState.hpp" 
#include "NstApiMachine.hpp" 
 
namespace Nes 
{ 
	namespace Api 
	{ 
		Machine::EventCaller Machine::eventCallback; 
 
		uint Machine::Is(uint a) const throw() 
		{ 
			return emulator.Is( a ); 
		} 
 
		bool Machine::Is(uint a,uint b) const throw() 
		{ 
			return emulator.Is( a, b ); 
		} 
 
		bool Machine::IsLocked() const 
		{ 
			return emulator.tracker.IsLocked(); 
		} 
 
		#ifdef NST_MSVC_OPTIMIZE 
		#pragma optimize("s", on) 
		#endif 
 
		Result Machine::Load(std::istream& stream,uint type) 
		{ 
			Result result; 
 
			const bool on = Is(ON); 
 
			try 
			{ 
				result = emulator.Load( &stream, type ); 
			} 
			catch (Result r) 
			{ 
				return r; 
			} 
			catch (const std::bad_alloc&) 
			{ 
				return RESULT_ERR_OUT_OF_MEMORY; 
			} 
			catch (...) 
			{ 
				return RESULT_ERR_GENERIC; 
			} 
 
			if (on) 
				Power( true ); 
 
			return result; 
		} 
 
		Result Machine::Load(std::istream& stream) throw() 
		{ 
			return Load( stream, Core::Image::UNKNOWN ); 
		} 
 
		Result Machine::LoadCartridge(std::istream& stream) throw() 
		{ 
			return Load( stream, Core::Image::CARTRIDGE ); 
		} 
 
		Result Machine::LoadDisk(std::istream& stream) throw() 
		{ 
			return Load( stream, Core::Image::DISK ); 
		} 
 
		Result Machine::LoadSound(std::istream& stream) throw() 
		{ 
			return Load( stream, Core::Image::SOUND ); 
		} 
 
		Result Machine::Unload() throw() 
		{ 
			if (!Is(IMAGE)) 
				return RESULT_NOP; 
 
			return emulator.Unload(); 
		} 
 
		Result Machine::Power(const bool on) throw() 
		{ 
			if (on == bool(Is(ON))) 
				return RESULT_NOP; 
 
			if (on) 
			{ 
				try 
				{ 
					emulator.Reset( true ); 
				} 
				catch (Result result) 
				{ 
					return result; 
				} 
				catch (const std::bad_alloc&) 
				{ 
					return RESULT_ERR_OUT_OF_MEMORY; 
				} 
				catch (...) 
				{ 
					return RESULT_ERR_GENERIC; 
				} 
 
				return RESULT_OK; 
			} 
			else 
			{ 
				return emulator.PowerOff(); 
			} 
		} 
 
		Result Machine::Reset(const bool hard) throw() 
		{ 
			if (!Is(ON) || IsLocked()) 
				return RESULT_ERR_NOT_READY; 
 
			try 
			{ 
				emulator.Reset( hard ); 
			} 
			catch (Result result) 
			{ 
				return result; 
			} 
			catch (const std::bad_alloc&) 
			{ 
				return RESULT_ERR_OUT_OF_MEMORY; 
			} 
			catch (...) 
			{ 
				return RESULT_ERR_GENERIC; 
			} 
 
			return RESULT_OK; 
		} 
 
		Machine::Mode Machine::GetMode() const throw() 
		{ 
			return static_cast(Is(NTSC|PAL)); 
		} 
 
		Machine::Mode Machine::GetDesiredMode() const throw() 
		{ 
			return (!emulator.image || emulator.image->GetRegion() == Core::Region::NTSC) ? NTSC : PAL; 
		} 
 
		Result Machine::SetMode(const Mode mode) throw() 
		{ 
			if (emulator.tracker.IsActive()) 
				return RESULT_ERR_NOT_READY; 
 
			if (mode == GetMode()) 
				return RESULT_NOP; 
 
			emulator.tracker.Resync(); 
			emulator.SwitchMode(); 
 
			return RESULT_OK; 
		} 
 
		Result Machine::LoadState(std::istream& stream) throw() 
		{ 
			if (!Is(GAME,ON) || IsLocked()) 
				return RESULT_ERR_NOT_READY; 
 
			try 
			{ 
				emulator.tracker.Resync(); 
				Core::State::Loader loader( &stream, true ); 
 
				if (emulator.LoadState( loader, true )) 
					return RESULT_OK; 
				else 
					return RESULT_ERR_INVALID_CRC; 
			} 
			catch (Result result) 
			{ 
				return result; 
			} 
			catch (std::bad_alloc&) 
			{ 
				return RESULT_ERR_OUT_OF_MEMORY; 
			} 
			catch (...) 
			{ 
				return RESULT_ERR_GENERIC; 
			} 
		} 
 
		Result Machine::SaveState(std::ostream& stream,Compression compression) const throw() 
		{ 
			if (!Is(GAME,ON)) 
				return RESULT_ERR_NOT_READY; 
 
			try 
			{ 
				Core::State::Saver saver( &stream, compression != NO_COMPRESSION, false ); 
				emulator.SaveState( saver ); 
			} 
			catch (Result result) 
			{ 
				return result; 
			} 
			catch (std::bad_alloc&) 
			{ 
				return RESULT_ERR_OUT_OF_MEMORY; 
			} 
			catch (...) 
			{ 
				return RESULT_ERR_GENERIC; 
			} 
 
			return RESULT_OK; 
		} 
 
		#ifdef NST_MSVC_OPTIMIZE 
		#pragma optimize("", on) 
		#endif 
	} 
}