project64/Source/Project64-core/N64System/Mips/Mempak.cpp

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/****************************************************************************
* *
* Project64 - A Nintendo 64 emulator. *
* http://www.pj64-emu.com/ *
* Copyright (C) 2012 Project64. All rights reserved. *
* *
* License: *
* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
* *
****************************************************************************/
#include "stdafx.h"
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#include "Mempak.h"
#include <stdio.h>
#include <Common/path.h>
CMempak::CMempak()
{
for (uint32_t i = 0; i < sizeof(m_Formatted) / sizeof(m_Formatted[0]); i++)
{
m_Formatted[i] = 0;
m_SaveExists[i] = true;
}
memset(m_Mempaks, 0, sizeof(m_Mempaks));
}
void CMempak::LoadMempak(int32_t Control, bool Create)
{
stdstr MempakName;
MempakName.Format("%s_Cont_%d", g_Settings->LoadStringVal(Game_GameName).c_str(), Control + 1);
CPath MempakPath(g_Settings->LoadStringVal(Directory_NativeSave).c_str(), stdstr_f("%s.mpk", MempakName.c_str()).c_str());
if (g_Settings->LoadBool(Setting_UniqueSaveDir))
{
MempakPath.AppendDirectory(g_Settings->LoadStringVal(Game_UniqueSaveDir).c_str());
}
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#ifdef _WIN32
MempakPath.NormalizePath(CPath(CPath::MODULE_DIRECTORY));
#endif
if (!Create && !MempakPath.Exists())
{
if (!m_Formatted[Control])
{
CMempak::Format(Control);
m_Formatted[Control] = true;
}
m_SaveExists[Control] = false;
return;
}
if (!MempakPath.DirectoryExists())
{
MempakPath.DirectoryCreate();
}
bool formatMempak = !MempakPath.Exists();
m_MempakHandle[Control].Open(MempakPath, CFileBase::modeReadWrite | CFileBase::modeNoTruncate | CFileBase::modeCreate);
m_MempakHandle[Control].SeekToBegin();
if (formatMempak)
{
if (!m_Formatted[Control])
{
CMempak::Format(Control);
m_Formatted[Control] = true;
}
m_MempakHandle[Control].Write(m_Mempaks[Control], 0x8000);
}
else
{
m_MempakHandle[Control].Read(m_Mempaks[Control], 0x8000);
m_Formatted[Control] = true;
}
}
void CMempak::Format(int32_t Control)
{
static const uint8_t Initialize[] = {
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0x81, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0xFF, 0xFF, 0xFF, 0xFF,
0x05, 0x1A, 0x5F, 0x13, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01, 0xFF,
0x66, 0x25, 0x99, 0xCD, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xFF, 0xFF, 0xFF, 0xFF, 0x05, 0x1A, 0x5F, 0x13, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0x01, 0xFF, 0x66, 0x25, 0x99, 0xCD, 0xFF, 0xFF, 0xFF, 0xFF,
0x05, 0x1A, 0x5F, 0x13, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01, 0xFF,
0x66, 0x25, 0x99, 0xCD, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xFF, 0xFF, 0xFF, 0xFF, 0x05, 0x1A, 0x5F, 0x13, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0x01, 0xFF, 0x66, 0x25, 0x99, 0xCD, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x71, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03,
0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03, 0x00, 0x03
};
memcpy(&m_Mempaks[Control][0], &Initialize[0], sizeof(Initialize));
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for (size_t count = sizeof(Initialize); count < 128 * 256; count++)
{
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m_Mempaks[Control][count] = 0x00;
}
}
uint8_t CMempak::CalculateCrc(uint8_t * DataToCrc)
{
uint32_t Count;
uint32_t XorTap;
int32_t Length;
uint8_t CRC = 0;
for (Count = 0; Count < 0x21; Count++)
{
for (Length = 0x80; Length >= 1; Length >>= 1)
{
XorTap = (CRC & 0x80) ? 0x85 : 0x00;
CRC <<= 1;
if (Count == 0x20)
{
CRC &= 0xFF;
}
else
{
if ((*DataToCrc & Length) != 0)
{
CRC |= 1;
}
}
CRC ^= XorTap;
}
DataToCrc++;
}
return CRC;
}
void CMempak::ReadFrom(int32_t Control, uint32_t address, uint8_t * data)
{
if (address < 0x8000)
{
if (m_SaveExists[Control] && !m_MempakHandle[Control].IsOpen())
{
LoadMempak(Control, false);
}
memcpy(data, &m_Mempaks[Control][address], 0x20);
}
else
{
memset(data, 0x00, 0x20);
/* Rumble pack area */
}
}
void CMempak::WriteTo(int32_t Control, uint32_t address, uint8_t * data)
{
if (address < 0x8000)
{
if (!m_Formatted[Control])
{
CMempak::Format(Control);
m_Formatted[Control] = true;
}
if (memcmp(&m_Mempaks[Control][address], data, 0x20) != 0)
{
if (!m_MempakHandle[Control].IsOpen())
{
LoadMempak(Control, true);
}
memcpy(&m_Mempaks[Control][address], data, 0x20);
m_MempakHandle[Control].Seek(address, CFile::begin);
m_MempakHandle[Control].Write(data, 0x20);
}
}
else
{
/* Rumble pack area */
}
}