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// Copyright 2017 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "DiscIO/VolumeFileBlobReader.h"
#include <memory>
#include <string_view>
#include "DiscIO/Filesystem.h"
#include "DiscIO/Volume.h"
namespace DiscIO
{
std::unique_ptr<VolumeFileBlobReader> VolumeFileBlobReader::Create(const Volume& volume,
const Partition& partition,
std::string_view file_path)
{
const FileSystem* file_system = volume.GetFileSystem(partition);
if (!file_system)
return nullptr;
std::unique_ptr<FileInfo> file_info = file_system->FindFileInfo(file_path);
if (!file_info || file_info->IsDirectory())
return nullptr;
return std::unique_ptr<VolumeFileBlobReader>{
new VolumeFileBlobReader(volume, partition, std::move(file_info))};
}
VolumeFileBlobReader::VolumeFileBlobReader(const Volume& volume, const Partition& partition,
std::unique_ptr<FileInfo> file_info)
: m_volume(volume), m_partition(partition), m_file_info(std::move(file_info))
{
}
// This is defined here instead of the header so that the definition of FileInfo is visible when
// m_file_info is destroyed, preventing a compile error caused by calling unique_ptr's destructor
// with an incomplete type.
VolumeFileBlobReader::~VolumeFileBlobReader() = default;
std::unique_ptr<BlobReader> VolumeFileBlobReader::CopyReader() const
{
ASSERT_MSG(DISCIO, false, "Unimplemented");
return nullptr;
}
u64 VolumeFileBlobReader::GetDataSize() const
{
return m_file_info->GetSize();
}
u64 VolumeFileBlobReader::GetRawSize() const
{
return GetDataSize();
}
u64 VolumeFileBlobReader::GetBlockSize() const
{
return m_volume.GetBlobReader().GetBlockSize();
}
bool VolumeFileBlobReader::HasFastRandomAccessInBlock() const
{
return m_volume.GetBlobReader().HasFastRandomAccessInBlock();
}
std::string VolumeFileBlobReader::GetCompressionMethod() const
{
return m_volume.GetBlobReader().GetCompressionMethod();
}
std::optional<int> VolumeFileBlobReader::GetCompressionLevel() const
{
return m_volume.GetBlobReader().GetCompressionLevel();
}
bool VolumeFileBlobReader::Read(u64 offset, u64 length, u8* out_ptr)
{
if (offset + length > m_file_info->GetSize())
return false;
return m_volume.Read(m_file_info->GetOffset() + offset, length, out_ptr, m_partition);
}
} // namespace DiscIO
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