// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <functional>
#include <map>
#include <memory>
#include <string>
#include <vector>
#include <boost/container/flat_map.hpp>
#include "common/common_types.h"
#include "core/file_sys/vfs.h"
namespace FileSys {
class CNMT;
class NCA;
class XCI;
enum class ContentRecordType : u8;
enum class TitleType : u8;
struct ContentRecord;
using NcaID = std::array<u8, 0x10>;
using RegisteredCacheParsingFunction = std::function<VirtualFile(const VirtualFile&, const NcaID&)>;
using VfsCopyFunction = std::function<bool(VirtualFile, VirtualFile)>;
enum class InstallResult {
Success,
ErrorAlreadyExists,
ErrorCopyFailed,
ErrorMetaFailed,
};
struct RegisteredCacheEntry {
u64 title_id;
ContentRecordType type;
std::string DebugInfo() const;
};
// boost flat_map requires operator< for O(log(n)) lookups.
bool operator<(const RegisteredCacheEntry& lhs, const RegisteredCacheEntry& rhs);
/*
* A class that catalogues NCAs in the registered directory structure.
* Nintendo's registered format follows this structure:
*
* Root
* | 000000XX <- XX is the ____ two digits of the NcaID
* | <hash>.nca <- hash is the NcaID (first half of SHA256 over entire file) (folder)
* | 00
* | 01 <- Actual content split along 4GB boundaries. (optional)
*
* (This impl also supports substituting the nca dir for an nca file, as that's more convenient when
* 4GB splitting can be ignored.)
*/
class RegisteredCache {
public:
// Parsing function defines the conversion from raw file to NCA. If there are other steps
// besides creating the NCA from the file (e.g. NAX0 on SD Card), that should go in a custom
// parsing function.
explicit RegisteredCache(VirtualDir dir,
RegisteredCacheParsingFunction parsing_function =
[](const VirtualFile& file, const NcaID& id) { return file; });
~RegisteredCache();
void Refresh();
bool HasEntry(u64 title_id, ContentRecordType type) const;
bool HasEntry(RegisteredCacheEntry entry) const;
VirtualFile GetEntryUnparsed(u64 title_id, ContentRecordType type) const;
VirtualFile GetEntryUnparsed(RegisteredCacheEntry entry) const;
VirtualFile GetEntryRaw(u64 title_id, ContentRecordType type) const;
VirtualFile GetEntryRaw(RegisteredCacheEntry entry) const;
std::shared_ptr<NCA> GetEntry(u64 title_id, ContentRecordType type) const;
std::shared_ptr<NCA> GetEntry(RegisteredCacheEntry entry) const;
std::vector<RegisteredCacheEntry> ListEntries() const;
// If a parameter is not boost::none, it will be filtered for from all entries.
std::vector<RegisteredCacheEntry> ListEntriesFilter(
boost::optional<TitleType> title_type = boost::none,
boost::optional<ContentRecordType> record_type = boost::none,
boost::optional<u64> title_id = boost::none) const;
// Raw copies all the ncas from the xci/nsp to the csache. Does some quick checks to make sure
// there is a meta NCA and all of them are accessible.
InstallResult InstallEntry(std::shared_ptr<XCI> xci, bool overwrite_if_exists = false,
const VfsCopyFunction& copy = &VfsRawCopy);
InstallResult InstallEntry(std::shared_ptr<NSP> nsp, bool overwrite_if_exists = false,
const VfsCopyFunction& copy = &VfsRawCopy);
// Due to the fact that we must use Meta-type NCAs to determine the existance of files, this
// poses quite a challenge. Instead of creating a new meta NCA for this file, yuzu will create a
// dir inside the NAND called 'yuzu_meta' and store the raw CNMT there.
// TODO(DarkLordZach): Author real meta-type NCAs and install those.
InstallResult InstallEntry(std::shared_ptr<NCA> nca, TitleType type,
bool overwrite_if_exists = false,
const VfsCopyFunction& copy = &VfsRawCopy);
private:
template <typename T>
void IterateAllMetadata(std::vector<T>& out,
std::function<T(const CNMT&, const ContentRecord&)> proc,
std::function<bool(const CNMT&, const ContentRecord&)> filter) const;
std::vector<NcaID> AccumulateFiles() const;
void ProcessFiles(const std::vector<NcaID>& ids);
void AccumulateYuzuMeta();
boost::optional<NcaID> GetNcaIDFromMetadata(u64 title_id, ContentRecordType type) const;
VirtualFile GetFileAtID(NcaID id) const;
VirtualFile OpenFileOrDirectoryConcat(const VirtualDir& dir, std::string_view path) const;
InstallResult RawInstallNCA(std::shared_ptr<NCA> nca, const VfsCopyFunction& copy,
bool overwrite_if_exists,
boost::optional<NcaID> override_id = boost::none);
bool RawInstallYuzuMeta(const CNMT& cnmt);
VirtualDir dir;
RegisteredCacheParsingFunction parser;
// maps tid -> NcaID of meta
boost::container::flat_map<u64, NcaID> meta_id;
// maps tid -> meta
boost::container::flat_map<u64, CNMT> meta;
// maps tid -> meta for CNMT in yuzu_meta
boost::container::flat_map<u64, CNMT> yuzu_meta;
};
} // namespace FileSys
