mirror of
https://github.com/0ldsk00l/nestopia.git
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127 lines
3.4 KiB
C++
127 lines
3.4 KiB
C++
////////////////////////////////////////////////////////////////////////////////////////
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//
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// Nestopia - NES/Famicom emulator written in C++
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//
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// Copyright (C) 2003-2008 Martin Freij
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//
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// This file is part of Nestopia.
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//
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// Nestopia is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// Nestopia is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Nestopia; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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////////////////////////////////////////////////////////////////////////////////////////
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#include <cstdlib>
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#include <ctime>
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#include "../NstMachine.hpp"
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#include "../NstImage.hpp"
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#include "../NstBarcodeReader.hpp"
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#include "../input/NstInpDevice.hpp"
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#include "../input/NstInpBarcodeWorld.hpp"
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#include "NstApiInput.hpp"
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#include "NstApiBarcodeReader.hpp"
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namespace Nes
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{
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namespace Api
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{
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#ifdef NST_MSVC_OPTIMIZE
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#pragma optimize("s", on)
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#endif
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Core::BarcodeReader* BarcodeReader::Query() const
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{
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if (emulator.image)
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{
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if (Core::Image::ExternalDevice device = emulator.image->QueryExternalDevice( Core::Image::EXT_BARCODE_READER ))
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{
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return static_cast<Core::BarcodeReader*>(device);
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}
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else if (emulator.expPort->GetType() == Input::BARCODEWORLD)
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{
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return &static_cast<Core::Input::BarcodeWorld*>(emulator.expPort)->GetReader();
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}
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}
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return NULL;
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}
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uint BarcodeReader::Randomize(char (&string)[MAX_DIGITS+1]) const throw()
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{
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uint digits = 0;
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if (Core::BarcodeReader* const barcodeReader = Query())
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{
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static uint extra = 0x1234;
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std::srand( std::time(NULL) + extra++ );
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if (!barcodeReader->IsDigitsSupported( MIN_DIGITS ))
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{
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digits = MAX_DIGITS;
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}
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else if (barcodeReader->IsDigitsSupported( MAX_DIGITS ) && (std::rand() & 0x1U))
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{
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digits = MAX_DIGITS;
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}
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else
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{
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digits = MIN_DIGITS;
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}
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uint sum = 0;
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for (uint i=0; i < digits-1; ++i)
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{
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const uint digit = uint(std::rand()) / (RAND_MAX / 10 + 1);
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string[i] = '0' + digit;
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sum += (i & 1) ? (digit * 3) : (digit * 1);
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}
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string[digits-1] = '0' + (10 - sum % 10) % 10;
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}
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string[digits] = '\0';
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return digits;
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}
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bool BarcodeReader::IsDigitsSupported(uint count) const throw()
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{
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if (Core::BarcodeReader* const barcodeReader = Query())
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return barcodeReader->IsDigitsSupported( count );
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return false;
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}
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bool BarcodeReader::CanTransfer() const throw()
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{
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return !emulator.tracker.IsLocked() && Query();
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}
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Result BarcodeReader::Transfer(const char* string,uint length) throw()
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{
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if (!emulator.tracker.IsLocked())
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{
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if (Core::BarcodeReader* const barcodeReader = Query())
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return emulator.tracker.TryResync( barcodeReader->Transfer( string, length ) ? RESULT_OK : RESULT_ERR_INVALID_PARAM );
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}
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return RESULT_ERR_NOT_READY;
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}
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#ifdef NST_MSVC_OPTIMIZE
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#pragma optimize("", on)
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#endif
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}
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}
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