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// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include <cstddef>
#include <cstdio>
#include <cstring>
#include <string>
#include "Common/Common.h"
#include "Common/FileUtil.h"
#include "Common/StringUtil.h"
#include "DiscIO/Blob.h"
#include "DiscIO/FileHandlerARC.h"
#include "DiscIO/Filesystem.h"
#define ARC_ID 0x55aa382d
namespace DiscIO
{
CARCFile::CARCFile(const std::string& _rFilename)
: m_pBuffer(nullptr)
, m_Initialized(false)
{
DiscIO::IBlobReader* pReader = DiscIO::CreateBlobReader(_rFilename.c_str());
if (pReader != nullptr)
{
u64 FileSize = pReader->GetDataSize();
m_pBuffer = new u8[(u32)FileSize];
pReader->Read(0, FileSize, m_pBuffer);
delete pReader;
m_Initialized = ParseBuffer();
}
}
CARCFile::CARCFile(const std::string& _rFilename, u32 offset)
: m_pBuffer(nullptr)
, m_Initialized(false)
{
DiscIO::IBlobReader* pReader = DiscIO::CreateBlobReader(_rFilename.c_str());
if (pReader != nullptr)
{
u64 FileSize = pReader->GetDataSize() - offset;
m_pBuffer = new u8[(u32)FileSize];
pReader->Read(offset, FileSize, m_pBuffer);
delete pReader;
m_Initialized = ParseBuffer();
}
}
CARCFile::CARCFile(const u8* _pBuffer, size_t _BufferSize)
: m_pBuffer(nullptr)
, 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 != nullptr)
{
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 == nullptr)
{
return 0;
}
if (pFileInfo->m_FileSize > _MaxBufferSize)
{
return 0;
}
memcpy(_pBuffer, &m_pBuffer[pFileInfo->m_Offset], (size_t)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 == nullptr)
{
return false;
}
File::IOFile pFile(_rExportFilename, "wb");
return pFile.WriteBytes(&m_pBuffer[pFileInfo->m_Offset], (size_t) pFileInfo->m_FileSize);
}
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((unsigned int)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(), "", szNameTable);
}
return true;
}
size_t CARCFile::BuildFilenames(const size_t _FirstIndex, const size_t _LastIndex, const std::string& _szDirectory, const char* _szNameTable)
{
size_t CurrentIndex = _FirstIndex;
while (CurrentIndex < _LastIndex)
{
SFileInfo& rFileInfo = m_FileInfoVector[CurrentIndex];
int const uOffset = rFileInfo.m_NameOffset & 0xFFFFFF;
rFileInfo.m_FullPath = _szDirectory + &_szNameTable[uOffset];
// check next index
if (rFileInfo.IsDirectory())
{
rFileInfo.m_FullPath += '/';
CurrentIndex = BuildFilenames(CurrentIndex + 1, (size_t)rFileInfo.m_FileSize, rFileInfo.m_FullPath, _szNameTable);
}
else
{
++CurrentIndex;
}
}
return CurrentIndex;
}
const SFileInfo* CARCFile::FindFileInfo(const std::string& _rFullPath) const
{
for (auto& fileInfo : m_FileInfoVector)
{
if (!strcasecmp(fileInfo.m_FullPath.c_str(), _rFullPath.c_str()))
{
return &fileInfo;
}
}
return nullptr;
}
} // namespace
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