dolphin/Source/Core/DiscIO/Src/FileSystemGCWii.cpp

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// Copyright (C) 2003-2008 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include "stdafx.h"
#include "Common.h"
#include <string>
#include "FileSystemGCWii.h"
#include "StringUtil.h"
namespace DiscIO
{
CFileSystemGCWii::CFileSystemGCWii(const IVolume *_rVolume)
: IFileSystem(_rVolume),
m_Initialized(false),
m_OffsetShift(0)
{
m_Initialized = InitFileSystem();
}
CFileSystemGCWii::~CFileSystemGCWii()
{
}
bool CFileSystemGCWii::IsInitialized() const
{
return m_Initialized;
}
u64 CFileSystemGCWii::GetFileSize(const char* _rFullPath) const
{
if (!m_Initialized)
return 0;
const SFileInfo* pFileInfo = FindFileInfo(_rFullPath);
if (pFileInfo != NULL)
return pFileInfo->m_FileSize;
return 0;
}
const char* CFileSystemGCWii::GetFileName(u64 _Address) const
{
for (size_t i = 0; i < m_FileInfoVector.size(); i++)
{
if ((m_FileInfoVector[i].m_Offset <= _Address) &&
((m_FileInfoVector[i].m_Offset + m_FileInfoVector[i].m_FileSize) > _Address))
{
return m_FileInfoVector[i].m_FullPath;
}
}
return NULL;
}
u64 CFileSystemGCWii::ReadFile(const char* _rFullPath, u8* _pBuffer, size_t _MaxBufferSize) const
{
if (!m_Initialized)
return 0;
const SFileInfo* pFileInfo = FindFileInfo(_rFullPath);
if (pFileInfo == NULL)
return 0;
if (pFileInfo->m_FileSize > _MaxBufferSize)
return 0;
m_rVolume->Read(pFileInfo->m_Offset, pFileInfo->m_FileSize, _pBuffer);
return pFileInfo->m_FileSize;
}
bool CFileSystemGCWii::ExportFile(const char* _rFullPath, const char* _rExportFilename) const
{
size_t filesize = (size_t) GetFileSize(_rFullPath);
if (filesize == 0)
return false;
u8* buffer = new u8[filesize];
if (!ReadFile(_rFullPath, buffer, filesize))
{
delete[] buffer;
return false;
}
FILE* f = fopen(_rExportFilename, "wb");
if (f)
{
fwrite(buffer, filesize, 1, f);
fclose(f);
delete[] buffer;
return true;
}
delete[] buffer;
return false;
}
bool CFileSystemGCWii::ExportAllFiles(const char* _rFullPath) const
{
return false;
}
u32 CFileSystemGCWii::Read32(u64 _Offset) const
{
u32 Temp = 0;
m_rVolume->Read(_Offset, 4, (u8*)&Temp);
return Common::swap32(Temp);
}
void CFileSystemGCWii::GetStringFromOffset(u64 _Offset, char* Filename) const
{
m_rVolume->Read(_Offset, 255, (u8*)Filename);
}
size_t CFileSystemGCWii::GetFileList(std::vector<const SFileInfo *> &_rFilenames) const
{
if (_rFilenames.size())
PanicAlert("GetFileList : input list has contents?");
_rFilenames.clear();
_rFilenames.reserve(m_FileInfoVector.size());
for (size_t i = 0; i < m_FileInfoVector.size(); i++)
_rFilenames.push_back(&m_FileInfoVector[i]);
return m_FileInfoVector.size();
}
const SFileInfo* CFileSystemGCWii::FindFileInfo(const char* _rFullPath) const
{
for (size_t i = 0; i < m_FileInfoVector.size(); i++)
{
if (!strcasecmp(m_FileInfoVector[i].m_FullPath, _rFullPath))
return &m_FileInfoVector[i];
}
return NULL;
}
bool CFileSystemGCWii::InitFileSystem()
{
if (Read32(0x18) == 0x5D1C9EA3)
{
m_OffsetShift = 2; // Wii file system
}
else if (Read32(0x1c) == 0xC2339F3D)
{
m_OffsetShift = 0; // GC file system
}
else
{
return false;
}
// read the whole FST
u64 FSTOffset = (u64)Read32(0x424) << m_OffsetShift;
// u32 FSTSize = Read32(0x428);
// u32 FSTMaxSize = Read32(0x42C);
// read all fileinfos
SFileInfo Root;
Root.m_NameOffset = Read32(FSTOffset + 0x0);
Root.m_Offset = (u64)Read32(FSTOffset + 0x4) << m_OffsetShift;
Root.m_FileSize = Read32(FSTOffset + 0x8);
if (Root.IsDirectory())
{
if (m_FileInfoVector.size())
PanicAlert("Wtf?");
u64 NameTableOffset = FSTOffset;
m_FileInfoVector.reserve((unsigned int)Root.m_FileSize);
for (u32 i = 0; i < Root.m_FileSize; i++)
{
SFileInfo sfi;
u64 Offset = FSTOffset + (i * 0xC);
sfi.m_NameOffset = Read32(Offset + 0x0);
sfi.m_Offset = (u64)Read32(Offset + 0x4) << m_OffsetShift;
sfi.m_FileSize = Read32(Offset + 0x8);
m_FileInfoVector.push_back(sfi);
NameTableOffset += 0xC;
}
BuildFilenames(1, m_FileInfoVector.size(), NULL, NameTableOffset);
}
return true;
}
// Changed this stuff from C++ string to C strings for speed in debug mode. Doesn't matter in release, but
// std::string is SLOW in debug mode.
size_t CFileSystemGCWii::BuildFilenames(const size_t _FirstIndex, const size_t _LastIndex, const char* _szDirectory, u64 _NameTableOffset)
{
size_t CurrentIndex = _FirstIndex;
while (CurrentIndex < _LastIndex)
{
SFileInfo *rFileInfo = &m_FileInfoVector[CurrentIndex];
u64 uOffset = _NameTableOffset + (rFileInfo->m_NameOffset & 0xFFFFFF);
char filename[512];
memset(filename, 0, sizeof(filename));
GetStringFromOffset(uOffset, filename);
// check next index
if (rFileInfo->IsDirectory())
{
// this is a directory, build up the new szDirectory
if (_szDirectory != NULL)
CharArrayFromFormat(rFileInfo->m_FullPath, "%s%s/", _szDirectory, filename);
else
CharArrayFromFormat(rFileInfo->m_FullPath, "%s/", filename);
CurrentIndex = BuildFilenames(CurrentIndex + 1, (size_t) rFileInfo->m_FileSize, rFileInfo->m_FullPath, _NameTableOffset);
}
else
{
// this is a filename
if (_szDirectory != NULL)
CharArrayFromFormat(rFileInfo->m_FullPath, "%s%s", _szDirectory, filename);
else
CharArrayFromFormat(rFileInfo->m_FullPath, "%s", filename);
CurrentIndex++;
}
}
return CurrentIndex;
}
} // namespace