dolphin/Source/Core/DiscIO/DirectoryBlob.h

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// Copyright 2008 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <array>
#include <cstddef>
#include <map>
#include <memory>
#include <optional>
#include <set>
#include <string>
#include <variant>
#include <vector>
#include "Common/CommonTypes.h"
#include "Common/FileUtil.h"
#include "DiscIO/Blob.h"
#include "DiscIO/WiiEncryptionCache.h"
namespace File
{
struct FSTEntry;
class IOFile;
} // namespace File
namespace DiscIO
{
enum class PartitionType : u32;
class DirectoryBlobReader;
// Returns true if the path is inside a DirectoryBlob and doesn't represent the DirectoryBlob itself
bool ShouldHideFromGameList(const std::string& volume_path);
class DiscContent
{
public:
using ContentSource =
std::variant<std::string, // File
const u8*, // Memory
DirectoryBlobReader* // Partition (which one it is is determined by m_offset)
>;
DiscContent(u64 offset, u64 size, const std::string& path);
DiscContent(u64 offset, u64 size, const u8* data);
DiscContent(u64 offset, u64 size, DirectoryBlobReader* blob);
// Provided because it's convenient when searching for DiscContent in an std::set
explicit DiscContent(u64 offset);
u64 GetOffset() const;
u64 GetEndOffset() const;
u64 GetSize() const;
bool Read(u64* offset, u64* length, u8** buffer) const;
bool operator==(const DiscContent& other) const { return GetEndOffset() == other.GetEndOffset(); }
bool operator!=(const DiscContent& other) const { return !(*this == other); }
bool operator<(const DiscContent& other) const { return GetEndOffset() < other.GetEndOffset(); }
bool operator>(const DiscContent& other) const { return other < *this; }
bool operator<=(const DiscContent& other) const { return !(*this < other); }
bool operator>=(const DiscContent& other) const { return !(*this > other); }
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private:
u64 m_offset;
u64 m_size = 0;
ContentSource m_content_source;
};
class DiscContentContainer
{
public:
template <typename T>
void Add(u64 offset, const std::vector<T>& vector)
{
return Add(offset, vector.size() * sizeof(T), reinterpret_cast<const u8*>(vector.data()));
}
void Add(u64 offset, u64 size, const std::string& path);
void Add(u64 offset, u64 size, const u8* data);
void Add(u64 offset, u64 size, DirectoryBlobReader* blob);
u64 CheckSizeAndAdd(u64 offset, const std::string& path);
u64 CheckSizeAndAdd(u64 offset, u64 max_size, const std::string& path);
bool Read(u64 offset, u64 length, u8* buffer) const;
private:
std::set<DiscContent> m_contents;
};
class DirectoryBlobPartition
{
public:
DirectoryBlobPartition() = default;
DirectoryBlobPartition(const std::string& root_directory, std::optional<bool> is_wii);
// We do not allow copying, because it might mess up the pointers inside DiscContents
DirectoryBlobPartition(const DirectoryBlobPartition&) = delete;
DirectoryBlobPartition& operator=(const DirectoryBlobPartition&) = delete;
DirectoryBlobPartition(DirectoryBlobPartition&&) = default;
DirectoryBlobPartition& operator=(DirectoryBlobPartition&&) = default;
bool IsWii() const { return m_is_wii; }
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u64 GetDataSize() const { return m_data_size; }
const std::string& GetRootDirectory() const { return m_root_directory; }
const std::vector<u8>& GetHeader() const { return m_disc_header; }
const DiscContentContainer& GetContents() const { return m_contents; }
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const std::array<u8, VolumeWii::AES_KEY_SIZE>& GetKey() const { return m_key; }
void SetKey(std::array<u8, VolumeWii::AES_KEY_SIZE> key) { m_key = key; }
private:
void SetDiscHeaderAndDiscType(std::optional<bool> is_wii);
void SetBI2();
// Returns DOL address
u64 SetApploader();
// Returns FST address
u64 SetDOL(u64 dol_address);
void BuildFST(u64 fst_address);
// FST creation
void WriteEntryData(u32* entry_offset, u8 type, u32 name_offset, u64 data_offset, u64 length,
u32 address_shift);
void WriteEntryName(u32* name_offset, const std::string& name, u64 name_table_offset);
void WriteDirectory(const File::FSTEntry& parent_entry, u32* fst_offset, u32* name_offset,
u64* data_offset, u32 parent_entry_index, u64 name_table_offset);
DiscContentContainer m_contents;
std::vector<u8> m_disc_header;
std::vector<u8> m_bi2;
std::vector<u8> m_apploader;
std::vector<u8> m_fst_data;
std::array<u8, VolumeWii::AES_KEY_SIZE> m_key;
std::string m_root_directory;
bool m_is_wii = false;
// GameCube has no shift, Wii has 2 bit shift
u32 m_address_shift = 0;
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u64 m_data_size;
};
class DirectoryBlobReader : public BlobReader
{
friend DiscContent;
public:
static std::unique_ptr<DirectoryBlobReader> Create(const std::string& dol_path);
// We do not allow copying, because it might mess up the pointers inside DiscContents
DirectoryBlobReader(const DirectoryBlobReader&) = delete;
DirectoryBlobReader& operator=(const DirectoryBlobReader&) = delete;
DirectoryBlobReader(DirectoryBlobReader&&) = default;
DirectoryBlobReader& operator=(DirectoryBlobReader&&) = default;
bool Read(u64 offset, u64 length, u8* buffer) override;
bool SupportsReadWiiDecrypted(u64 offset, u64 size, u64 partition_data_offset) const override;
bool ReadWiiDecrypted(u64 offset, u64 size, u8* buffer, u64 partition_data_offset) override;
BlobType GetBlobType() const override;
u64 GetRawSize() const override;
u64 GetDataSize() const override;
bool IsDataSizeAccurate() const override { return true; }
u64 GetBlockSize() const override { return 0; }
bool HasFastRandomAccessInBlock() const override { return true; }
std::string GetCompressionMethod() const override { return {}; }
private:
struct PartitionWithType
{
PartitionWithType(DirectoryBlobPartition&& partition_, PartitionType type_)
: partition(std::move(partition_)), type(type_)
{
}
DirectoryBlobPartition partition;
PartitionType type;
};
explicit DirectoryBlobReader(const std::string& game_partition_root,
const std::string& true_root);
const DirectoryBlobPartition* GetPartition(u64 offset, u64 size, u64 partition_data_offset) const;
bool EncryptPartitionData(u64 offset, u64 size, u8* buffer, u64 partition_data_offset,
u64 partition_data_decrypted_size);
void SetNonpartitionDiscHeader(const std::vector<u8>& partition_header,
const std::string& game_partition_root);
void SetWiiRegionData(const std::string& game_partition_root);
void SetPartitions(std::vector<PartitionWithType>&& partitions);
void SetPartitionHeader(DirectoryBlobPartition* partition, u64 partition_address);
// For GameCube:
DirectoryBlobPartition m_gamecube_pseudopartition;
// For Wii:
DiscContentContainer m_nonpartition_contents;
std::map<u64, DirectoryBlobPartition> m_partitions;
WiiEncryptionCache m_encryption_cache;
bool m_is_wii;
bool m_encrypted;
std::vector<u8> m_disc_header_nonpartition;
std::vector<u8> m_partition_table;
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std::vector<u8> m_wii_region_data;
std::vector<std::vector<u8>> m_partition_headers;
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u64 m_data_size;
};
} // namespace DiscIO