257 lines
8.7 KiB
C++
257 lines
8.7 KiB
C++
// Copyright 2017 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <array>
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#include "common/common_types.h"
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#include "common/logging/log.h"
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#include "common/swap.h"
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#include "core/file_sys/archive_selfncch.h"
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#include "core/file_sys/errors.h"
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#include "core/file_sys/ivfc_archive.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// FileSys namespace
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namespace FileSys {
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enum class SelfNCCHFilePathType : u32 {
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RomFS = 0,
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Code = 1, // This is not supported by SelfNCCHArchive but by archive 0x2345678E
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ExeFS = 2,
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UpdateRomFS = 5, // This is presumably for accessing the RomFS of the update patch.
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};
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struct SelfNCCHFilePath {
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u32_le type;
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std::array<char, 8> exefs_filename;
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};
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static_assert(sizeof(SelfNCCHFilePath) == 12, "NCCHFilePath has wrong size!");
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// A read-only file created from a block of data. It only allows you to read the entire file at
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// once, in a single read operation.
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class ExeFSSectionFile final : public FileBackend {
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public:
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explicit ExeFSSectionFile(std::shared_ptr<std::vector<u8>> data_) : data(std::move(data_)) {}
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ResultVal<size_t> Read(u64 offset, size_t length, u8* buffer) const override {
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if (offset != 0) {
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LOG_ERROR(Service_FS, "offset must be zero!");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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if (length != data->size()) {
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LOG_ERROR(Service_FS, "size must match the file size!");
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return ERROR_INCORRECT_EXEFS_READ_SIZE;
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}
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std::memcpy(buffer, data->data(), data->size());
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return MakeResult<size_t>(data->size());
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}
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ResultVal<size_t> Write(u64 offset, size_t length, bool flush,
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const u8* buffer) const override {
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LOG_ERROR(Service_FS, "The file is read-only!");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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u64 GetSize() const override {
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return data->size();
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}
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bool SetSize(u64 size) const override {
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return false;
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}
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bool Close() const override {
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return true;
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}
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void Flush() const override {}
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private:
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std::shared_ptr<std::vector<u8>> data;
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};
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// SelfNCCHArchive represents the running application itself. From this archive the application can
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// open RomFS and ExeFS, excluding the .code section.
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class SelfNCCHArchive final : public ArchiveBackend {
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public:
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explicit SelfNCCHArchive(const NCCHData& ncch_data_) : ncch_data(ncch_data_) {}
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std::string GetName() const override {
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return "SelfNCCHArchive";
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}
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ResultVal<std::unique_ptr<FileBackend>> OpenFile(const Path& path, const Mode&) const override {
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// Note: SelfNCCHArchive doesn't check the open mode.
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if (path.GetType() != LowPathType::Binary) {
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LOG_ERROR(Service_FS, "Path need to be Binary");
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return ERROR_INVALID_PATH;
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}
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std::vector<u8> binary = path.AsBinary();
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if (binary.size() != sizeof(SelfNCCHFilePath)) {
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LOG_ERROR(Service_FS, "Wrong path size %zu", binary.size());
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return ERROR_INVALID_PATH;
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}
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SelfNCCHFilePath file_path;
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std::memcpy(&file_path, binary.data(), sizeof(SelfNCCHFilePath));
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switch (static_cast<SelfNCCHFilePathType>(file_path.type)) {
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case SelfNCCHFilePathType::UpdateRomFS:
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LOG_WARNING(Service_FS, "(STUBBED) open update RomFS");
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return OpenRomFS();
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case SelfNCCHFilePathType::RomFS:
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return OpenRomFS();
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case SelfNCCHFilePathType::Code:
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LOG_ERROR(Service_FS, "Reading the code section is not supported!");
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return ERROR_COMMAND_NOT_ALLOWED;
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case SelfNCCHFilePathType::ExeFS: {
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const auto& raw = file_path.exefs_filename;
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auto end = std::find(raw.begin(), raw.end(), '\0');
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std::string filename(raw.begin(), end);
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return OpenExeFS(filename);
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}
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default:
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LOG_ERROR(Service_FS, "Unknown file type %u!", static_cast<u32>(file_path.type));
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return ERROR_INVALID_PATH;
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}
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}
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ResultCode DeleteFile(const Path& path) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ResultCode RenameFile(const Path& src_path, const Path& dest_path) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ResultCode DeleteDirectory(const Path& path) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ResultCode DeleteDirectoryRecursively(const Path& path) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ResultCode CreateFile(const Path& path, u64 size) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ResultCode CreateDirectory(const Path& path) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ResultCode RenameDirectory(const Path& src_path, const Path& dest_path) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ResultVal<std::unique_ptr<DirectoryBackend>> OpenDirectory(const Path& path) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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u64 GetFreeBytes() const override {
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return 0;
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}
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private:
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ResultVal<std::unique_ptr<FileBackend>> OpenRomFS() const {
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if (ncch_data.romfs_file) {
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return MakeResult<std::unique_ptr<FileBackend>>(std::make_unique<IVFCFile>(
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ncch_data.romfs_file, ncch_data.romfs_offset, ncch_data.romfs_size));
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} else {
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LOG_INFO(Service_FS, "Unable to read RomFS");
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return ERROR_ROMFS_NOT_FOUND;
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}
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}
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ResultVal<std::unique_ptr<FileBackend>> OpenExeFS(const std::string& filename) const {
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if (filename == "icon") {
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if (ncch_data.icon) {
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return MakeResult<std::unique_ptr<FileBackend>>(
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std::make_unique<ExeFSSectionFile>(ncch_data.icon));
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}
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LOG_WARNING(Service_FS, "Unable to read icon");
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return ERROR_EXEFS_SECTION_NOT_FOUND;
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}
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if (filename == "logo") {
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if (ncch_data.logo) {
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return MakeResult<std::unique_ptr<FileBackend>>(
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std::make_unique<ExeFSSectionFile>(ncch_data.logo));
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}
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LOG_WARNING(Service_FS, "Unable to read logo");
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return ERROR_EXEFS_SECTION_NOT_FOUND;
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}
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if (filename == "banner") {
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if (ncch_data.banner) {
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return MakeResult<std::unique_ptr<FileBackend>>(
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std::make_unique<ExeFSSectionFile>(ncch_data.banner));
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}
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LOG_WARNING(Service_FS, "Unable to read banner");
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return ERROR_EXEFS_SECTION_NOT_FOUND;
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}
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LOG_ERROR(Service_FS, "Unknown ExeFS section %s!", filename.c_str());
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return ERROR_INVALID_PATH;
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}
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NCCHData ncch_data;
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};
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ArchiveFactory_SelfNCCH::ArchiveFactory_SelfNCCH(Loader::AppLoader& app_loader) {
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std::shared_ptr<FileUtil::IOFile> romfs_file_;
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if (Loader::ResultStatus::Success ==
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app_loader.ReadRomFS(romfs_file_, ncch_data.romfs_offset, ncch_data.romfs_size)) {
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ncch_data.romfs_file = std::move(romfs_file_);
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}
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std::vector<u8> buffer;
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if (Loader::ResultStatus::Success == app_loader.ReadIcon(buffer))
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ncch_data.icon = std::make_shared<std::vector<u8>>(std::move(buffer));
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buffer.clear();
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if (Loader::ResultStatus::Success == app_loader.ReadLogo(buffer))
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ncch_data.logo = std::make_shared<std::vector<u8>>(std::move(buffer));
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buffer.clear();
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if (Loader::ResultStatus::Success == app_loader.ReadBanner(buffer))
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ncch_data.banner = std::make_shared<std::vector<u8>>(std::move(buffer));
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}
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ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SelfNCCH::Open(const Path& path) {
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auto archive = std::make_unique<SelfNCCHArchive>(ncch_data);
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return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
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}
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ResultCode ArchiveFactory_SelfNCCH::Format(const Path&, const FileSys::ArchiveFormatInfo&) {
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LOG_ERROR(Service_FS, "Attempted to format a SelfNCCH archive.");
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return ERROR_INVALID_PATH;
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}
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ResultVal<ArchiveFormatInfo> ArchiveFactory_SelfNCCH::GetFormatInfo(const Path&) const {
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LOG_ERROR(Service_FS, "Attempted to get format info of a SelfNCCH archive");
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return ERROR_INVALID_PATH;
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}
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} // namespace FileSys
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