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////////////////////////////////////////////////////////////////////////////////////////
//
// Nestopia - NES/Famicom emulator written in C++
//
// Copyright (C) 2003-2008 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 <cstring>
#include "NstInpDevice.hpp"
#include "NstInpBarcodeWorld.hpp"
namespace Nes
{
namespace Core
{
namespace Input
{
#ifdef NST_MSVC_OPTIMIZE
#pragma optimize("s", on)
#endif
BarcodeWorld::BarcodeWorld(const Cpu& cpu)
: Device(cpu,Api::Input::BARCODEWORLD)
{
BarcodeWorld::Reset();
}
void BarcodeWorld::Reset()
{
reader.Reset();
}
void BarcodeWorld::LoadState(State::Loader& loader,const dword id)
{
reader.LoadState( loader, id );
}
void BarcodeWorld::SaveState(State::Saver& saver,const byte id) const
{
reader.SaveState( saver, id );
}
void BarcodeWorld::Reader::Reset()
{
stream = data;
std::memset( data, END, MAX_DATA_LENGTH );
}
bool BarcodeWorld::Reader::IsDigitsSupported(uint count) const
{
return count == NUM_DIGITS;
}
bool BarcodeWorld::Reader::IsTransferring() const
{
return *stream != END;
}
void BarcodeWorld::Reader::LoadState(State::Loader& loader,const dword id)
{
if (id == AsciiId<'B','W'>::V)
{
Reset();
while (const dword chunk = loader.Begin())
{
switch (chunk)
{
case AsciiId<'P','T','R'>::V:
stream = data + (loader.Read8() & (MAX_DATA_LENGTH-1));
break;
case AsciiId<'D','A','T'>::V:
loader.Uncompress( data );
data[MAX_DATA_LENGTH-1] = END;
break;
}
loader.End();
}
}
}
void BarcodeWorld::Reader::SaveState(State::Saver& saver,const byte id) const
{
saver.Begin( AsciiId<'B','W'>::R(0,0,id) );
if (Reader::IsTransferring())
{
saver.Begin( AsciiId<'P','T','R'>::V ).Write8( stream - data ).End();
saver.Begin( AsciiId<'D','A','T'>::V ).Compress( data ).End();
}
saver.End();
}
bool BarcodeWorld::Reader::Transfer(cstring const string,const uint length)
{
NST_COMPILE_ASSERT( MAX_DATA_LENGTH >= 191 );
Reset();
if (!string || length != NUM_DIGITS)
return false;
byte code[NUM_DIGITS+7];
for (uint i=0; i < NUM_DIGITS; ++i)
{
const int c = string[i];
if (c >= '0' && c <= '9')
code[i] = c - '0' + Ascii<'0'>::V;
else
return false;
}
code[NUM_DIGITS+0] = Ascii<'S'>::V;
code[NUM_DIGITS+1] = Ascii<'U'>::V;
code[NUM_DIGITS+2] = Ascii<'N'>::V;
code[NUM_DIGITS+3] = Ascii<'S'>::V;
code[NUM_DIGITS+4] = Ascii<'O'>::V;
code[NUM_DIGITS+5] = Ascii<'F'>::V;
code[NUM_DIGITS+6] = Ascii<'T'>::V;
byte* NST_RESTRICT output = data;
*output++ = 0x04;
for (uint i=0; i < NUM_DIGITS+7; ++i)
{
*output++ = 0x04;
for (uint j=0x01, c=code[i]; j != 0x100; j <<= 1)
*output++ = (c & j) ? 0x00 : 0x04;
*output++ = 0x00;
}
return true;
}
#ifdef NST_MSVC_OPTIMIZE
#pragma optimize("", on)
#endif
uint BarcodeWorld::Reader::Read()
{
if (Reader::IsTransferring())
{
uint next = *stream;
stream += (next != END);
return next;
}
else
{
return 0;
}
}
uint BarcodeWorld::Peek(uint port)
{
return port == 1 ? reader.Read() : 0;
}
}
}
}
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