project64/Source/Project64/N64 System/Mips/Mempak.cpp

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#include "stdafx.h"
static BYTE Mempaks[4][0x8000];
HANDLE hMempakFile = NULL;
void Mempak::Close(void) {
if (hMempakFile) {
CloseHandle(hMempakFile);
hMempakFile = NULL;
}
}
void LoadMempak (void) {
CPath FileName;
DWORD dwRead, count, count2;
BYTE Initilize[] = {
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,
0x00,0x71,0x00,0x03, 0x00,0x03,0x00,0x03, 0x00,0x03,0x00,0x03, 0x00,0x03,0x00,0x03,
};
for (count = 0; count < 4; count ++) {
for (count2 = 0; count2 < 0x8000; count2 += 2) {
Mempaks[count][count2] = 0x00;
Mempaks[count][count2 + 1] = 0x03;
}
memcpy(&Mempaks[count][0],Initilize,sizeof(Initilize));
}
FileName.SetDriveDirectory( _Settings->LoadString(Directory_NativeSave).c_str());
FileName.SetName(_Settings->LoadString(Game_GameName).c_str());
FileName.SetExtension("mpk");
if (!FileName.DirectoryExists())
{
FileName.CreateDirectory();
}
hMempakFile = CreateFile(FileName,GENERIC_WRITE | GENERIC_READ, FILE_SHARE_READ,NULL,OPEN_ALWAYS,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, NULL);
if (hMempakFile == INVALID_HANDLE_VALUE)
{
WriteTraceF(TraceError,"Mempak::LoadMempak: Failed to open (%s), lastError = %X",(LPCTSTR)FileName, GetLastError());
return;
}
SetFilePointer(hMempakFile,0,NULL,FILE_BEGIN);
ReadFile(hMempakFile,Mempaks,sizeof(Mempaks),&dwRead,NULL);
WriteFile(hMempakFile,Mempaks,sizeof(Mempaks),&dwRead,NULL);
}
BYTE Mempak::CalculateCrc(BYTE * DataToCrc) {
DWORD Count;
DWORD XorTap;
int Length;
BYTE CRC = 0;
for (Count = 0; Count < 0x21; Count++) {
for (Length = 0x80; Length >= 1; Length >>= 1) {
XorTap = (CRC & 0x80) ? 0x85 : 0;
CRC <<= 1;
if (Count == 0x20) {
CRC &= 0xFF;
} else {
if ((*DataToCrc & Length) != 0) {
CRC |= 1;
}
}
CRC ^= XorTap;
}
DataToCrc++;
}
return CRC;
}
void Mempak::ReadFrom(int Control, int Address, BYTE * Buffer) {
if (Address == 0x8001) {
memset(Buffer, 0, 0x20);
Buffer[0x20] = CalculateCrc(Buffer);
return;
}
Address &= 0xFFE0;
if (Address <= 0x7FE0) {
if (hMempakFile == NULL) {
LoadMempak();
}
memcpy(Buffer, &Mempaks[Control][Address], 0x20);
} else {
memset(Buffer, 0, 0x20);
/* Rumble pack area */
}
Buffer[0x20] = CalculateCrc(Buffer);
}
void Mempak::WriteTo(int Control, int Address, BYTE * Buffer) {
DWORD dwWritten;
if (Address == 0x8001) { Buffer[0x20] = CalculateCrc(Buffer); return; }
Address &= 0xFFE0;
if (Address <= 0x7FE0) {
if (hMempakFile == NULL) {
LoadMempak();
}
memcpy(&Mempaks[Control][Address], Buffer, 0x20);
SetFilePointer(hMempakFile,Control*0x8000,NULL,FILE_BEGIN);
WriteFile(hMempakFile,&Mempaks[Control][0],0x8000,&dwWritten,NULL);
} else {
/* Rumble pack area */
}
Buffer[0x20] = CalculateCrc(Buffer);
}