forked from dolphin-emu/dolphin
506 lines
12 KiB
C++
506 lines
12 KiB
C++
// Copyright 2013 Dolphin Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#include "CommonPaths.h"
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#include "FileBlob.h"
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#include "MathUtil.h"
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#include "VolumeDirectory.h"
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namespace DiscIO
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{
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CVolumeDirectory::CVolumeDirectory(const std::string& _rDirectory, bool _bIsWii,
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const std::string& _rApploader, const std::string& _rDOL)
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: m_totalNameSize(0)
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, m_dataStartAddress(-1)
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, m_fstSize(0)
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, m_FSTData(NULL)
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, m_apploaderSize(0)
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, m_apploader(NULL)
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, m_DOLSize(0)
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, m_DOL(NULL)
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, FST_ADDRESS(0)
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, DOL_ADDRESS(0)
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{
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m_rootDirectory = ExtractDirectoryName(_rDirectory);
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// create the default disk header
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m_diskHeader = new u8[DISKHEADERINFO_ADDRESS];
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memset(m_diskHeader, 0, (size_t)DISKHEADERINFO_ADDRESS);
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SetUniqueID("AGBJ01");
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SetName("Default name");
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if(_bIsWii)
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{
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SetDiskTypeWii();
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}
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else
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{
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SetDiskTypeGC();
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}
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m_diskHeaderInfo = new SDiskHeaderInfo();
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// Don't load the dol if we've no apploader...
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if (SetApploader(_rApploader))
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SetDOL(_rDOL);
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BuildFST();
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}
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CVolumeDirectory::~CVolumeDirectory()
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{
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delete[] m_FSTData;
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m_FSTData = NULL;
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delete[] m_diskHeader;
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m_diskHeader = NULL;
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delete m_diskHeaderInfo;
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m_diskHeaderInfo = NULL;
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delete[] m_DOL;
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m_DOL = NULL;
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delete[] m_apploader;
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m_apploader = NULL;
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}
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bool CVolumeDirectory::IsValidDirectory(const std::string& _rDirectory)
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{
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std::string directoryName = ExtractDirectoryName(_rDirectory);
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return File::IsDirectory(directoryName);
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}
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bool CVolumeDirectory::RAWRead( u64 _Offset, u64 _Length, u8* _pBuffer ) const
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{
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return false;
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}
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bool CVolumeDirectory::Read(u64 _Offset, u64 _Length, u8* _pBuffer) const
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{
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// header
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if(_Offset < DISKHEADERINFO_ADDRESS)
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{
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WriteToBuffer(DISKHEADER_ADDRESS, DISKHEADERINFO_ADDRESS, m_diskHeader, _Offset, _Length, _pBuffer);
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}
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// header info
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if(_Offset >= DISKHEADERINFO_ADDRESS && _Offset < APPLOADER_ADDRESS)
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{
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WriteToBuffer(DISKHEADERINFO_ADDRESS, sizeof(m_diskHeaderInfo), (u8*)m_diskHeaderInfo, _Offset, _Length, _pBuffer);
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}
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// apploader
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if(_Offset >= APPLOADER_ADDRESS && _Offset < APPLOADER_ADDRESS + m_apploaderSize)
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{
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WriteToBuffer(APPLOADER_ADDRESS, m_apploaderSize, m_apploader, _Offset, _Length, _pBuffer);
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}
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// dol
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if(_Offset >= DOL_ADDRESS && _Offset < DOL_ADDRESS + m_DOLSize)
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{
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WriteToBuffer(DOL_ADDRESS, m_DOLSize, m_DOL, _Offset, _Length, _pBuffer);
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}
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// fst
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if(_Offset >= FST_ADDRESS && _Offset < m_dataStartAddress)
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{
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WriteToBuffer(FST_ADDRESS, m_fstSize, m_FSTData, _Offset, _Length, _pBuffer);
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}
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if(m_virtualDisk.size() == 0)
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return true;
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// Determine which file the offset refers to
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std::map<u64, std::string>::const_iterator fileIter = m_virtualDisk.lower_bound(_Offset);
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if(fileIter->first > _Offset && fileIter != m_virtualDisk.begin())
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--fileIter;
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// zero fill to start of file data
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PadToAddress(fileIter->first, _Offset, _Length, _pBuffer);
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while(fileIter != m_virtualDisk.end() && _Length > 0)
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{
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_dbg_assert_(DVDINTERFACE, fileIter->first <= _Offset);
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u64 fileOffset = _Offset - fileIter->first;
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PlainFileReader* reader = PlainFileReader::Create(fileIter->second.c_str());
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if(reader == NULL)
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return false;
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u64 fileSize = reader->GetDataSize();
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if(fileOffset < fileSize)
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{
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u64 fileBytes = fileSize - fileOffset;
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if(_Length < fileBytes)
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fileBytes = _Length;
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if(!reader->Read(fileOffset, fileBytes, _pBuffer))
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return false;
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_Length -= fileBytes;
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_pBuffer += fileBytes;
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_Offset += fileBytes;
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}
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++fileIter;
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if(fileIter != m_virtualDisk.end())
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{
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_dbg_assert_(DVDINTERFACE, fileIter->first >= _Offset);
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PadToAddress(fileIter->first, _Offset, _Length, _pBuffer);
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}
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delete reader;
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}
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return true;
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}
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std::string CVolumeDirectory::GetUniqueID() const
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{
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_dbg_assert_(DVDINTERFACE, m_diskHeader);
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char buffer[7];
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memcpy(buffer, m_diskHeader, 6);
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buffer[6] = 0;
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std::string id = buffer;
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return id;
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}
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void CVolumeDirectory::SetUniqueID(std::string _ID)
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{
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_dbg_assert_(DVDINTERFACE, m_diskHeader);
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u32 length = (u32)_ID.length();
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if(length > 6)
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length = 6;
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memcpy(m_diskHeader, _ID.c_str(), length);
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}
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IVolume::ECountry CVolumeDirectory::GetCountry() const
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{
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_dbg_assert_(DVDINTERFACE, m_diskHeader);
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u8 CountryCode = m_diskHeader[3];
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return CountrySwitch(CountryCode);
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}
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std::string CVolumeDirectory::GetMakerID() const
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{
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return "VOID";
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}
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std::vector<std::string> CVolumeDirectory::GetNames() const
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{
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_dbg_assert_(DVDINTERFACE, m_diskHeader);
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return std::vector<std::string>(1, (char*)(m_diskHeader + 0x20));
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}
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void CVolumeDirectory::SetName(std::string _Name)
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{
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_dbg_assert_(DVDINTERFACE, m_diskHeader);
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u32 length = (u32)_Name.length();
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if(length > MAX_NAME_LENGTH)
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length = MAX_NAME_LENGTH;
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memcpy(m_diskHeader + 0x20, _Name.c_str(), length);
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m_diskHeader[length + 0x20] = 0;
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}
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u32 CVolumeDirectory::GetFSTSize() const
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{
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return 0;
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}
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std::string CVolumeDirectory::GetApploaderDate() const
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{
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return "VOID";
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}
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u64 CVolumeDirectory::GetSize() const
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{
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return 0;
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}
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u64 CVolumeDirectory::GetRawSize() const
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{
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return GetSize();
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}
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std::string CVolumeDirectory::ExtractDirectoryName(const std::string& _rDirectory)
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{
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std::string directoryName = _rDirectory;
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size_t lastSep = directoryName.find_last_of(DIR_SEP_CHR);
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if(lastSep != directoryName.size() - 1)
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{
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// TODO: This assumes that file names will always have a dot in them
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// and directory names never will; both assumptions are often
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// right but in general wrong.
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size_t extensionStart = directoryName.find_last_of('.');
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if(extensionStart != std::string::npos && extensionStart > lastSep)
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{
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directoryName.resize(lastSep);
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}
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}
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else
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{
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directoryName.resize(lastSep);
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}
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return directoryName;
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}
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void CVolumeDirectory::SetDiskTypeWii()
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{
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_dbg_assert_(DVDINTERFACE, m_diskHeader);
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m_diskHeader[0x18] = 0x5d;
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m_diskHeader[0x19] = 0x1c;
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m_diskHeader[0x1a] = 0x9e;
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m_diskHeader[0x1b] = 0xa3;
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memset(m_diskHeader + 0x1c, 0, 4);
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m_addressShift = 2;
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}
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void CVolumeDirectory::SetDiskTypeGC()
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{
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_dbg_assert_(DVDINTERFACE, m_diskHeader);
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memset(m_diskHeader + 0x18, 0, 4);
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m_diskHeader[0x1c] = 0xc2;
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m_diskHeader[0x1d] = 0x33;
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m_diskHeader[0x1e] = 0x9f;
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m_diskHeader[0x1f] = 0x3d;
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m_addressShift = 0;
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}
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bool CVolumeDirectory::SetApploader(const std::string& _rApploader)
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{
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if (!_rApploader.empty())
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{
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std::string data;
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if (!File::ReadFileToString(_rApploader.c_str(), data))
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{
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PanicAlertT("Apploader unable to load from file");
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return false;
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}
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m_apploaderSize = 0x20 + Common::swap32(*(u32*)&data.data()[0x14]) + Common::swap32(*(u32*)&data.data()[0x18]);
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if (m_apploaderSize != data.size())
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{
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PanicAlertT("Apploader is the wrong size...is it really an apploader?");
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return false;
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}
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m_apploader = new u8[m_apploaderSize];
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copy(data.begin(), data.end(), m_apploader);
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// 32byte aligned (plus 0x20 padding)
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DOL_ADDRESS = ROUND_UP(APPLOADER_ADDRESS + m_apploaderSize + 0x20, 0x20ull);
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return true;
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}
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else
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{
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m_apploaderSize = 0x20;
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m_apploader = new u8[m_apploaderSize];
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// Make sure BS2 HLE doesn't try to run the apploader
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*(u32*)&m_apploader[0x10] = (u32)-1;
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return false;
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}
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}
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void CVolumeDirectory::SetDOL(const std::string& _rDOL)
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{
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if (!_rDOL.empty())
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{
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std::string data;
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File::ReadFileToString(_rDOL.c_str(), data);
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m_DOLSize = data.size();
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m_DOL = new u8[m_DOLSize];
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copy(data.begin(), data.end(), m_DOL);
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Write32((u32)(DOL_ADDRESS >> m_addressShift), 0x0420, m_diskHeader);
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// 32byte aligned (plus 0x20 padding)
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FST_ADDRESS = ROUND_UP(DOL_ADDRESS + m_DOLSize + 0x20, 0x20ull);
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}
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}
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void CVolumeDirectory::BuildFST()
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{
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if(m_FSTData)
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{
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delete m_FSTData;
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}
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File::FSTEntry rootEntry;
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// read data from physical disk to rootEntry
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u32 totalEntries = AddDirectoryEntries(m_rootDirectory, rootEntry) + 1;
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m_fstNameOffset = totalEntries * ENTRY_SIZE; // offset in FST nameTable
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m_fstSize = m_fstNameOffset + m_totalNameSize;
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m_FSTData = new u8[(u32)m_fstSize];
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// if FST hasn't been assigned (ie no apploader/dol setup), set to default
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if (FST_ADDRESS == 0)
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FST_ADDRESS = APPLOADER_ADDRESS + 0x2000;
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// 4 byte aligned start of data on disk
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m_dataStartAddress = ROUND_UP(FST_ADDRESS + m_fstSize, 0x8000ull);
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u64 curDataAddress = m_dataStartAddress;
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u32 fstOffset = 0; // offset within FST data
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u32 nameOffset = 0; // offset within name table
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u32 rootOffset = 0; // offset of root of FST
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// write root entry
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WriteEntryData(fstOffset, DIRECTORY_ENTRY, 0, 0, totalEntries);
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for(auto& entry : rootEntry.children)
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{
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WriteEntry(entry, fstOffset, nameOffset, curDataAddress, rootOffset);
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}
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// overflow check
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_dbg_assert_(DVDINTERFACE, nameOffset == m_totalNameSize);
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// write FST size and location
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_dbg_assert_(DVDINTERFACE, m_diskHeader);
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Write32((u32)(FST_ADDRESS >> m_addressShift), 0x0424, m_diskHeader);
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Write32((u32)(m_fstSize >> m_addressShift), 0x0428, m_diskHeader);
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Write32((u32)(m_fstSize >> m_addressShift), 0x042c, m_diskHeader);
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}
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void CVolumeDirectory::WriteToBuffer(u64 _SrcStartAddress, u64 _SrcLength, u8* _Src,
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u64& _Address, u64& _Length, u8*& _pBuffer) const
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{
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if(_Length == 0)
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return;
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_dbg_assert_(DVDINTERFACE, _Address >= _SrcStartAddress);
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u64 srcOffset = _Address - _SrcStartAddress;
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if(srcOffset < _SrcLength)
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{
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u64 srcBytes = _SrcLength - srcOffset;
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if(_Length < srcBytes)
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srcBytes = _Length;
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memcpy(_pBuffer, _Src + srcOffset, (size_t)srcBytes);
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_Length -= srcBytes;
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_pBuffer += srcBytes;
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_Address += srcBytes;
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}
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}
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void CVolumeDirectory::PadToAddress(u64 _StartAddress, u64& _Address, u64& _Length, u8*& _pBuffer) const
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{
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if(_StartAddress <= _Address)
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return;
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u64 padBytes = _StartAddress - _Address;
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if(padBytes > _Length)
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padBytes = _Length;
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if(_Length > 0)
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{
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memset(_pBuffer, 0, (size_t)padBytes);
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_Length -= padBytes;
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_pBuffer += padBytes;
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_Address += padBytes;
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}
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}
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void CVolumeDirectory::Write32(u32 data, u32 offset, u8* buffer)
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{
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buffer[offset++] = (data >> 24);
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buffer[offset++] = (data >> 16) & 0xff;
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buffer[offset++] = (data >> 8) & 0xff;
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buffer[offset] = (data) & 0xff;
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}
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void CVolumeDirectory::WriteEntryData(u32& entryOffset, u8 type, u32 nameOffset, u64 dataOffset, u32 length)
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{
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m_FSTData[entryOffset++] = type;
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m_FSTData[entryOffset++] = (nameOffset >> 16) & 0xff;
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m_FSTData[entryOffset++] = (nameOffset >> 8) & 0xff;
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m_FSTData[entryOffset++] = (nameOffset) & 0xff;
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Write32((u32)(dataOffset >> m_addressShift), entryOffset, m_FSTData);
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entryOffset += 4;
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Write32((u32)length, entryOffset, m_FSTData);
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entryOffset += 4;
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}
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void CVolumeDirectory::WriteEntryName(u32& nameOffset, const std::string& name)
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{
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strncpy((char*)(m_FSTData + nameOffset + m_fstNameOffset), name.c_str(), name.length() + 1);
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nameOffset += (u32)(name.length() + 1);
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}
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void CVolumeDirectory::WriteEntry(const File::FSTEntry& entry, u32& fstOffset, u32& nameOffset, u64& dataOffset, u32 parentEntryNum)
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{
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if(entry.isDirectory)
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{
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u32 myOffset = fstOffset;
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u32 myEntryNum = myOffset / ENTRY_SIZE;
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WriteEntryData(fstOffset, DIRECTORY_ENTRY, nameOffset, parentEntryNum, (u32)(myEntryNum + entry.size + 1));
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WriteEntryName(nameOffset, entry.virtualName);
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for(const auto& child : entry.children)
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{
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WriteEntry(child, fstOffset, nameOffset, dataOffset, myEntryNum);
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}
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}
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else
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{
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// put entry in FST
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WriteEntryData(fstOffset, FILE_ENTRY, nameOffset, dataOffset, (u32)entry.size);
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WriteEntryName(nameOffset, entry.virtualName);
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// write entry to virtual disk
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_dbg_assert_(DVDINTERFACE, m_virtualDisk.find(dataOffset) == m_virtualDisk.end());
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m_virtualDisk.insert(make_pair(dataOffset, entry.physicalName));
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// 4 byte aligned
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dataOffset = ROUND_UP(dataOffset + entry.size, 0x8000ull);
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}
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}
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static u32 ComputeNameSize(const File::FSTEntry& parentEntry)
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{
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u32 nameSize = 0;
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const std::vector<File::FSTEntry>& children = parentEntry.children;
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for (auto it = children.cbegin(); it != children.cend(); ++it)
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{
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const File::FSTEntry& entry = *it;
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if (entry.isDirectory)
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{
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nameSize += ComputeNameSize(entry);
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}
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nameSize += (u32)entry.virtualName.length() + 1;
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}
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return nameSize;
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}
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u32 CVolumeDirectory::AddDirectoryEntries(const std::string& _Directory, File::FSTEntry& parentEntry)
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{
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u32 foundEntries = ScanDirectoryTree(_Directory, parentEntry);
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m_totalNameSize += ComputeNameSize(parentEntry);
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return foundEntries;
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}
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} // namespace
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