dolphin/Source/Core/DiscIO/Src/FileHandlerARC.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 "FileHandlerARC.h"
#include "StringUtil.h"
#define ARC_ID 0x55aa382d
namespace DiscIO
{
CARCFile::CARCFile(const u8* _pBuffer, size_t _BufferSize)
: m_pBuffer(NULL),
m_Initialized(false)
{
m_pBuffer = new u8[_BufferSize];
if (m_pBuffer)
{
memcpy(m_pBuffer, _pBuffer, _BufferSize);
m_Initialized = ParseBuffer();
}
}
CARCFile::~CARCFile()
{
delete [] m_pBuffer;
}
bool
CARCFile::IsInitialized()
{
return(m_Initialized);
}
size_t
CARCFile::GetFileSize(const std::string& _rFullPath)
{
if (!m_Initialized)
{
return(0);
}
const SFileInfo* pFileInfo = FindFileInfo(_rFullPath);
if (pFileInfo != NULL)
{
return((size_t) pFileInfo->m_FileSize);
}
return(0);
}
size_t
CARCFile::ReadFile(const std::string& _rFullPath, u8* _pBuffer, size_t _MaxBufferSize)
{
if (!m_Initialized)
{
return(0);
}
const SFileInfo* pFileInfo = FindFileInfo(_rFullPath);
if (pFileInfo == NULL)
{
return(0);
}
if (pFileInfo->m_FileSize > _MaxBufferSize)
{
return(0);
}
memcpy(_pBuffer, &m_pBuffer[pFileInfo->m_Offset], pFileInfo->m_FileSize);
return((size_t) pFileInfo->m_FileSize);
}
bool
CARCFile::ExportFile(const std::string& _rFullPath, const std::string& _rExportFilename)
{
if (!m_Initialized)
{
return(false);
}
const SFileInfo* pFileInfo = FindFileInfo(_rFullPath);
if (pFileInfo == NULL)
{
return(false);
}
FILE* pFile = fopen(_rExportFilename.c_str(), "wb");
if (pFile == NULL)
{
return(false);
}
fwrite(&m_pBuffer[pFileInfo->m_Offset], (size_t) pFileInfo->m_FileSize, 1, pFile);
fclose(pFile);
return(true);
}
bool
CARCFile::ExportAllFiles(const std::string& _rFullPath)
{
return(false);
}
bool
CARCFile::ParseBuffer()
{
// check ID
u32 ID = Common::swap32(*(u32*)(m_pBuffer));
if (ID != ARC_ID)
{
return(false);
}
// read header
u32 FSTOffset = Common::swap32(*(u32*)(m_pBuffer + 0x4));
//u32 FSTSize = Common::swap32(*(u32*)(m_pBuffer + 0x8));
//u32 FileOffset = Common::swap32(*(u32*)(m_pBuffer + 0xC));
// read all file infos
SFileInfo Root;
Root.m_NameOffset = Common::swap32(*(u32*)(m_pBuffer + FSTOffset + 0x0));
Root.m_Offset = Common::swap32(*(u32*)(m_pBuffer + FSTOffset + 0x4));
Root.m_FileSize = Common::swap32(*(u32*)(m_pBuffer + FSTOffset + 0x8));
if (Root.IsDirectory())
{
m_FileInfoVector.resize(Root.m_FileSize);
const char* szNameTable = (char*)(m_pBuffer + FSTOffset);
for (size_t i = 0; i < m_FileInfoVector.size(); i++)
{
u8* Offset = m_pBuffer + FSTOffset + (i * 0xC);
m_FileInfoVector[i].m_NameOffset = Common::swap32(*(u32*)(Offset + 0x0));
m_FileInfoVector[i].m_Offset = Common::swap32(*(u32*)(Offset + 0x4));
m_FileInfoVector[i].m_FileSize = Common::swap32(*(u32*)(Offset + 0x8));
szNameTable += 0xC;
}
BuildFilenames(1, m_FileInfoVector.size(), NULL, szNameTable);
}
return(true);
}
size_t
CARCFile::BuildFilenames(const size_t _FirstIndex, const size_t _LastIndex, const char* _szDirectory, const char* _szNameTable)
{
size_t CurrentIndex = _FirstIndex;
while (CurrentIndex < _LastIndex)
{
SFileInfo& rFileInfo = m_FileInfoVector[CurrentIndex];
int uOffset = rFileInfo.m_NameOffset & 0xFFFFFF;
// check next index
if (rFileInfo.IsDirectory())
{
// this is a directory, build up the new szDirectory
if (_szDirectory != NULL)
{
sprintf(rFileInfo.m_FullPath, "%s%s\\", _szDirectory, &_szNameTable[uOffset]);
}
else
{
sprintf(rFileInfo.m_FullPath, "%s\\", &_szNameTable[uOffset]);
}
CurrentIndex = BuildFilenames(CurrentIndex + 1, (size_t) rFileInfo.m_FileSize, rFileInfo.m_FullPath, _szNameTable);
}
else
{
// this is a filename
if (_szDirectory != NULL)
{
sprintf(rFileInfo.m_FullPath, "%s%s", _szDirectory, &_szNameTable[uOffset]);
}
else
{
sprintf(rFileInfo.m_FullPath, "%s", &_szNameTable[uOffset]);
}
CurrentIndex++;
}
}
return(CurrentIndex);
}
const SFileInfo*
CARCFile::FindFileInfo(std::string _rFullPath) const
{
for (size_t i = 0; i < m_FileInfoVector.size(); i++)
{
if (!strcasecmp(m_FileInfoVector[i].m_FullPath, _rFullPath.c_str()))
{
return(&m_FileInfoVector[i]);
}
}
return(NULL);
}
} // namespace