514 lines
15 KiB
C++
514 lines
15 KiB
C++
/****************************************************************************
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* *
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* Project 64 - A Nintendo 64 emulator. *
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* http://www.pj64-emu.com/ *
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* Copyright (C) 2012 Project64. All rights reserved. *
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* *
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* License: *
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* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
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* *
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****************************************************************************/
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#include "stdafx.h"
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CN64Rom::CN64Rom ( void )
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{
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m_hRomFile = NULL;
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m_hRomFileMapping = NULL;
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m_ROMImage = NULL;
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m_ErrorMsg = EMPTY_STRING;
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m_RomName = "";
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m_FileName = "";
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m_MD5 = "";
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m_Country = UnknownCountry;
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m_CicChip = CIC_UNKNOWN;
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}
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CN64Rom::~CN64Rom ( void ) {
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UnallocateRomImage();
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}
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bool CN64Rom::AllocateAndLoadN64Image ( const char * FileLoc, bool LoadBootCodeOnly ) {
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//Try to open the target file
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HANDLE hFile = CreateFile(FileLoc,GENERIC_READ,FILE_SHARE_READ,NULL,
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OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS,
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NULL);
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if (hFile == INVALID_HANDLE_VALUE) { return false; }
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//Read the first 4 bytes and make sure it is a valid n64 image
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DWORD dwRead; BYTE Test[4];
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SetFilePointer(hFile,0,0,FILE_BEGIN);
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ReadFile(hFile,Test,4,&dwRead,NULL);
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if (!IsValidRomImage(Test)) {
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CloseHandle( hFile );
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return false;
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}
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//Get the size of the rom and try to allocate the memory needed.
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DWORD RomFileSize = GetFileSize(hFile,NULL);
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//if loading boot code then just load the first 0x1000 bytes
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if (LoadBootCodeOnly) { RomFileSize = 0x1000; }
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BYTE * Image = (BYTE *)VirtualAlloc(NULL,RomFileSize,MEM_RESERVE|MEM_COMMIT,PAGE_READWRITE);
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if (Image == NULL) {
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SetError(MSG_MEM_ALLOC_ERROR);
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CloseHandle( hFile );
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return false;
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}
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//Load the n64 rom to the allocated memory
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g_Notify->DisplayMessage(5,MSG_LOADING);
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SetFilePointer(hFile,0,0,FILE_BEGIN);
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DWORD count, TotalRead = 0;
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for (count = 0; count < (int)RomFileSize; count += ReadFromRomSection) {
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DWORD dwToRead = RomFileSize - count;
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if (dwToRead > ReadFromRomSection) { dwToRead = ReadFromRomSection; }
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if (!ReadFile(hFile,&Image[count],dwToRead,&dwRead,NULL)) {
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VirtualFree(Image,0,MEM_RELEASE);
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CloseHandle( hFile );
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SetError(MSG_FAIL_IMAGE);
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return false;
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}
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TotalRead += dwRead;
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//Show Message of how much % wise of the rom has been loaded
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g_Notify->DisplayMessage(0,"%s: %.2f%c",GS(MSG_LOADED),((float)TotalRead/(float)RomFileSize) * 100.0f,'%');
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}
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dwRead = TotalRead;
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if (RomFileSize != dwRead) {
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VirtualFree(Image,0,MEM_RELEASE);
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CloseHandle( hFile );
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SetError(MSG_FAIL_IMAGE);
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return false;
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}
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//save information about the rom loaded
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m_hRomFile = hFile;
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m_ROMImage = Image;
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m_RomFileSize = RomFileSize;
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g_Notify->DisplayMessage(5,MSG_BYTESWAP);
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ByteSwapRom();
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//Protect the memory so that it can not be written to.
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DWORD OldProtect;
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VirtualProtect(m_ROMImage,m_RomFileSize,PAGE_READONLY,&OldProtect);
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return true;
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}
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bool CN64Rom::AllocateAndLoadZipImage ( const char * FileLoc, bool LoadBootCodeOnly ) {
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unzFile file = unzOpen(FileLoc);
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if (file == NULL) { return false; }
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int port = unzGoToFirstFile(file);
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bool FoundRom = FALSE;
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//scan through all files in zip to a suitable file is found
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while(port == UNZ_OK && FoundRom == FALSE) {
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unz_file_info info;
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char zname[_MAX_PATH];
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unzGetCurrentFileInfo(file, &info, zname, sizeof(zname), NULL,0, NULL,0);
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if (unzLocateFile(file, zname, 1) != UNZ_OK ) {
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SetError(MSG_FAIL_ZIP);
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break;
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}
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if( unzOpenCurrentFile(file) != UNZ_OK ) {
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SetError(MSG_FAIL_ZIP);
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break;
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}
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//Read the first 4 bytes to check magic number
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BYTE Test[4];
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unzReadCurrentFile(file,Test,sizeof(Test));
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if (IsValidRomImage(Test)) {
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//Get the size of the rom and try to allocate the memory needed.
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DWORD RomFileSize = info.uncompressed_size;
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if (LoadBootCodeOnly) {
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RomFileSize = 0x1000;
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}
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BYTE * Image = (BYTE *)VirtualAlloc(NULL,RomFileSize,MEM_RESERVE|MEM_COMMIT,PAGE_READWRITE);
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if (Image == NULL) {
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SetError(MSG_MEM_ALLOC_ERROR);
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unzCloseCurrentFile(file);
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break;
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}
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//Load the n64 rom to the allocated memory
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g_Notify->DisplayMessage(5,MSG_LOADING);
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memcpy(Image,Test,4);
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DWORD dwRead, count, TotalRead = 0;
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for (count = 4; count < (int)RomFileSize; count += ReadFromRomSection) {
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DWORD dwToRead = RomFileSize - count;
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if (dwToRead > ReadFromRomSection) { dwToRead = ReadFromRomSection; }
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dwRead = unzReadCurrentFile(file,&Image[count],dwToRead);
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if (dwRead == 0) {
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SetError(MSG_FAIL_ZIP);
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VirtualFree(Image,0,MEM_RELEASE);
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unzCloseCurrentFile(file);
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break;
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}
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TotalRead += dwRead;
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//Show Message of how much % wise of the rom has been loaded
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g_Notify->DisplayMessage(5,"%s: %.2f%c",GS(MSG_LOADED),((float)TotalRead/(float)RomFileSize) * 100.0f,'%');
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}
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dwRead = TotalRead + 4;
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if (RomFileSize != dwRead) {
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VirtualFree(Image,0,MEM_RELEASE);
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unzCloseCurrentFile(file);
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SetError(MSG_FAIL_ZIP);
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g_Notify->DisplayMessage(1,"");
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break;
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}
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//save information about the rom loaded
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m_hRomFile = NULL;
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m_ROMImage = Image;
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m_RomFileSize = RomFileSize;
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FoundRom = true;
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g_Notify->DisplayMessage(5,MSG_BYTESWAP);
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ByteSwapRom();
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//Protect the memory so that it can not be written to.
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DWORD OldProtect;
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VirtualProtect(m_ROMImage,m_RomFileSize,PAGE_READONLY,&OldProtect);
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g_Notify->DisplayMessage(1,"");
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}
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unzCloseCurrentFile(file);
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if (FoundRom == FALSE) {
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port = unzGoToNextFile(file);
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}
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}
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unzClose(file);
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return FoundRom;
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}
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void CN64Rom::ByteSwapRom (void) {
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DWORD count;
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switch (*((DWORD *)&m_ROMImage[0])) {
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case 0x12408037:
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for( count = 0 ; count < m_RomFileSize; count += 4 ) {
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m_ROMImage[count] ^= m_ROMImage[count+2];
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m_ROMImage[count + 2] ^= m_ROMImage[count];
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m_ROMImage[count] ^= m_ROMImage[count+2];
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m_ROMImage[count + 1] ^= m_ROMImage[count + 3];
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m_ROMImage[count + 3] ^= m_ROMImage[count + 1];
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m_ROMImage[count + 1] ^= m_ROMImage[count + 3];
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}
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break;
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case 0x40123780:
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for( count = 0 ; count < m_RomFileSize; count += 4 ) {
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m_ROMImage[count] ^= m_ROMImage[count+3];
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m_ROMImage[count + 3] ^= m_ROMImage[count];
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m_ROMImage[count] ^= m_ROMImage[count+3];
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m_ROMImage[count + 1] ^= m_ROMImage[count + 2];
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m_ROMImage[count + 2] ^= m_ROMImage[count + 1];
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m_ROMImage[count + 1] ^= m_ROMImage[count + 2];
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}
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break;
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case 0x80371240: break;
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default:
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g_Notify->DisplayError("ByteSwapRom: %X",m_ROMImage[0]);
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}
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}
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void CN64Rom::CalculateCicChip ( void )
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{
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__int64 CRC = 0;
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if (m_ROMImage == NULL)
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{
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m_CicChip = CIC_UNKNOWN;
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return;
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}
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for (int count = 0x40; count < 0x1000; count += 4) {
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CRC += *(DWORD *)(m_ROMImage+count);
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}
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switch (CRC) {
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case 0x000000D0027FDF31: m_CicChip = CIC_NUS_6101; break;
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case 0x000000CFFB631223: m_CicChip = CIC_NUS_6101; break;
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case 0x000000D057C85244: m_CicChip = CIC_NUS_6102; break;
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case 0x000000D6497E414B: m_CicChip = CIC_NUS_6103; break;
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case 0x0000011A49F60E96: m_CicChip = CIC_NUS_6105; break;
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case 0x000000D6D5BE5580: m_CicChip = CIC_NUS_6106; break;
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default:
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if (bHaveDebugger())
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g_Notify->DisplayError("Unknown CIC checksum:\n%I64d.", CRC);
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m_CicChip = CIC_UNKNOWN; break;
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}
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}
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CICChip CN64Rom::CicChipID ( void ) {
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return m_CicChip;
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}
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bool CN64Rom::IsValidRomImage ( BYTE Test[4] ) {
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if ( *((DWORD *)&Test[0]) == 0x40123780 ) { return true; }
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if ( *((DWORD *)&Test[0]) == 0x12408037 ) { return true; }
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if ( *((DWORD *)&Test[0]) == 0x80371240 ) { return true; }
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return false;
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}
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void CN64Rom::NotificationCB ( LPCSTR Status, CN64Rom * /*_this*/ )
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{
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g_Notify->DisplayMessage(5,"%s",Status);
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}
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bool CN64Rom::LoadN64Image ( const char * FileLoc, bool LoadBootCodeOnly ) {
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UnallocateRomImage();
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m_ErrorMsg = EMPTY_STRING;
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char drive[_MAX_DRIVE], dir[_MAX_DIR], fname[_MAX_FNAME], ext[_MAX_EXT];
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_splitpath(FileLoc,drive,dir,fname,ext);
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bool Loaded7zFile = false;
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if (strstr(FileLoc,"?") != NULL || strcmp(ext,".z7") == 0)
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{
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char FullPath[MAX_PATH + 100];
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strcpy(FullPath,FileLoc);
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//this should be a 7zip file
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char * SubFile = strstr(FullPath,"?");
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if (SubFile == NULL)
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{
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//Pop up a dialog and select file
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//allocate memory for sub name and copy selected file name to var
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return false; //remove once dialog is done
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} else {
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*SubFile = '\0';
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SubFile += 1;
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}
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C7zip ZipFile(FullPath);
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ZipFile.SetNotificationCallback((C7zip::LP7ZNOTIFICATION)NotificationCB,this);
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for (int i = 0; i < ZipFile.NumFiles(); i++)
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{
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CFileItem * f = ZipFile.FileItem(i);
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if (f->IsDirectory)
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{
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continue;
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}
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if (_stricmp(f->Name, SubFile) != 0)
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{
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continue;
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}
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//Get the size of the rom and try to allocate the memory needed.
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DWORD RomFileSize = f->Size;
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//if loading boot code then just load the first 0x1000 bytes
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if (LoadBootCodeOnly) { RomFileSize = 0x1000; }
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BYTE * Image = (BYTE *)VirtualAlloc(NULL,RomFileSize,MEM_RESERVE|MEM_COMMIT,PAGE_READWRITE);
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if (Image == NULL) {
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SetError(MSG_MEM_ALLOC_ERROR);
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return false;
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}
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//Load the n64 rom to the allocated memory
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g_Notify->DisplayMessage(5,MSG_LOADING);
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if (!ZipFile.GetFile(i,Image,RomFileSize))
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{
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VirtualFree(Image,0,MEM_RELEASE);
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SetError(MSG_FAIL_IMAGE);
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return false;
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}
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if (!IsValidRomImage(Image))
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{
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VirtualFree(Image,0,MEM_RELEASE);
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SetError(MSG_FAIL_IMAGE);
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return false;
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}
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//save information about the rom loaded
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m_ROMImage = Image;
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m_RomFileSize = RomFileSize;
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g_Notify->DisplayMessage(5,MSG_BYTESWAP);
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ByteSwapRom();
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//Protect the memory so that it can not be written to.
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DWORD OldProtect;
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VirtualProtect(m_ROMImage,m_RomFileSize,PAGE_READONLY,&OldProtect);
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Loaded7zFile = true;
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break;
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}
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if (!Loaded7zFile)
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{
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SetError(MSG_7Z_FILE_NOT_FOUND);
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return false;
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}
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}
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//Try to open the file as a zip file
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if (!Loaded7zFile)
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{
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if (!AllocateAndLoadZipImage(FileLoc,LoadBootCodeOnly)) {
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if (m_ErrorMsg != EMPTY_STRING) {
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return false;
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}
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//other wise treat if normal file and open the passed file
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HANDLE hFile = CreateFile(FileLoc,GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS,NULL);
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if (hFile == INVALID_HANDLE_VALUE) { SetError(MSG_FAIL_OPEN_IMAGE); return false; }
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//Create a file map
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HANDLE hFileMapping = CreateFileMapping(hFile, NULL, PAGE_READONLY, 0, 0, NULL);
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if (hFileMapping == NULL) {
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CloseHandle(hFile);
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SetError(MSG_FAIL_OPEN_IMAGE);
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return false;
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}
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//Map the file to a memory pointer .. ie a way of pretending to load the rom
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//loose the bonus of being able to flip it on the fly tho.
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BYTE * Image = (PBYTE)MapViewOfFile(hFileMapping,FILE_MAP_READ,0,0,0);
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if (Image == NULL) {
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CloseHandle(hFileMapping);
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CloseHandle(hFile);
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SetError(MSG_FAIL_OPEN_IMAGE);
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return false;
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}
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if (!IsValidRomImage(Image)) {
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UnmapViewOfFile (Image);
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CloseHandle(hFileMapping);
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CloseHandle(hFile);
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SetError(MSG_FAIL_IMAGE);
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return false;
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}
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if (*((DWORD *)Image) == 0x80371240) {
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m_hRomFile = hFile;
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m_hRomFileMapping = hFileMapping;
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m_ROMImage = Image;
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m_RomFileSize = GetFileSize(hFile,NULL);
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} else {
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if (!AllocateAndLoadN64Image(FileLoc,LoadBootCodeOnly)) { return false; }
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}
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}
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}
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char RomName[260];
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int count;
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//Get the header from the rom image
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memcpy(&RomName[0],(void *)(m_ROMImage + 0x20),20);
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for( count = 0 ; count < 20; count += 4 ) {
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RomName[count] ^= RomName[count+3];
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RomName[count + 3] ^= RomName[count];
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RomName[count] ^= RomName[count+3];
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RomName[count + 1] ^= RomName[count + 2];
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RomName[count + 2] ^= RomName[count + 1];
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RomName[count + 1] ^= RomName[count + 2];
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}
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//truncate all the spaces at the end of the string
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for( count = 19 ; count >= 0; count -- ) {
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if (RomName[count] == ' ') {
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RomName[count] = '\0';
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} else if (RomName[count] == '\0') {
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} else {
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count = -1;
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}
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}
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RomName[20] = '\0';
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if (strlen(RomName) == 0) {
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char drive[_MAX_DRIVE], dir[_MAX_DIR], fname[_MAX_FNAME], ext[_MAX_EXT];
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_splitpath(FileLoc,drive,dir,fname,ext);
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strcpy(RomName,fname);
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}
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//remove all /,\,: from the string
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for( count = 0 ; count < (int)strlen(RomName); count ++ ) {
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switch (RomName[count]) {
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case '/': case '\\': RomName[count] = '-'; break;
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case ':': RomName[count] = ';'; break;
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}
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}
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m_RomName = RomName;
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m_FileName = FileLoc;
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m_MD5 = "";
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if (!LoadBootCodeOnly) {
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//Calculate files MD5
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m_MD5 = MD5((const unsigned char *)m_ROMImage, m_RomFileSize).hex_digest();
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}
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m_Country = (Country)m_ROMImage[0x3D];
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m_RomIdent.Format("%08X-%08X-C:%X",*(DWORD *)(&m_ROMImage[0x10]),*(DWORD *)(&m_ROMImage[0x14]),m_ROMImage[0x3D]);
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CalculateCicChip();
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if (!LoadBootCodeOnly && g_Rom == this)
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{
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SaveRomSettingID();
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}
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return true;
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}
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//Save the settings of the loaded rom, so all loaded settings about rom will be identified with
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//this rom
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void CN64Rom::SaveRomSettingID ( void )
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{
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g_Settings->SaveString(Game_GameName,m_RomName.c_str());
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g_Settings->SaveString(Game_IniKey,m_RomIdent.c_str());
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switch (GetCountry())
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{
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case Germany: case french: case Italian:
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case Europe: case Spanish: case Australia:
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case X_PAL: case Y_PAL:
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g_Settings->SaveDword(Game_SystemType,SYSTEM_PAL);
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break;
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default:
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g_Settings->SaveDword(Game_SystemType,SYSTEM_NTSC);
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break;
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}
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}
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void CN64Rom::ClearRomSettingID ( void )
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{
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g_Settings->SaveString(Game_GameName,"");
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g_Settings->SaveString(Game_IniKey,"");
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}
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void CN64Rom::SetError ( LanguageStringID ErrorMsg ) {
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m_ErrorMsg = ErrorMsg;
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}
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void CN64Rom::UnallocateRomImage ( void ) {
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if (m_hRomFileMapping) {
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UnmapViewOfFile (m_ROMImage);
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CloseHandle(m_hRomFileMapping);
|
|
m_ROMImage = NULL;
|
|
m_hRomFileMapping = NULL;
|
|
}
|
|
if (m_hRomFile) {
|
|
CloseHandle(m_hRomFile);
|
|
m_hRomFile = NULL;
|
|
}
|
|
|
|
//if this value is still set then the image was not created a map
|
|
//file but created with VirtualAllocate
|
|
if (m_ROMImage) {
|
|
VirtualFree(m_ROMImage,0,MEM_RELEASE);
|
|
m_ROMImage = NULL;
|
|
}
|
|
}
|