suyu/src/core/file_sys/partition_filesystem.cpp
Morph 065867e2c2
common: fs: Rework the Common Filesystem interface to make use of std::filesystem (#6270)
* common: fs: fs_types: Create filesystem types

Contains various filesystem types used by the Common::FS library

* common: fs: fs_util: Add std::string to std::u8string conversion utility

* common: fs: path_util: Add utlity functions for paths

Contains various utility functions for getting or manipulating filesystem paths used by the Common::FS library

* common: fs: file: Rewrite the IOFile implementation

* common: fs: Reimplement Common::FS library using std::filesystem

* common: fs: fs_paths: Add fs_paths to replace common_paths

* common: fs: path_util: Add the rest of the path functions

* common: Remove the previous Common::FS implementation

* general: Remove unused fs includes

* string_util: Remove unused function and include

* nvidia_flags: Migrate to the new Common::FS library

* settings: Migrate to the new Common::FS library

* logging: backend: Migrate to the new Common::FS library

* core: Migrate to the new Common::FS library

* perf_stats: Migrate to the new Common::FS library

* reporter: Migrate to the new Common::FS library

* telemetry_session: Migrate to the new Common::FS library

* key_manager: Migrate to the new Common::FS library

* bis_factory: Migrate to the new Common::FS library

* registered_cache: Migrate to the new Common::FS library

* xts_archive: Migrate to the new Common::FS library

* service: acc: Migrate to the new Common::FS library

* applets/profile: Migrate to the new Common::FS library

* applets/web: Migrate to the new Common::FS library

* service: filesystem: Migrate to the new Common::FS library

* loader: Migrate to the new Common::FS library

* gl_shader_disk_cache: Migrate to the new Common::FS library

* nsight_aftermath_tracker: Migrate to the new Common::FS library

* vulkan_library: Migrate to the new Common::FS library

* configure_debug: Migrate to the new Common::FS library

* game_list_worker: Migrate to the new Common::FS library

* config: Migrate to the new Common::FS library

* configure_filesystem: Migrate to the new Common::FS library

* configure_per_game_addons: Migrate to the new Common::FS library

* configure_profile_manager: Migrate to the new Common::FS library

* configure_ui: Migrate to the new Common::FS library

* input_profiles: Migrate to the new Common::FS library

* yuzu_cmd: config: Migrate to the new Common::FS library

* yuzu_cmd: Migrate to the new Common::FS library

* vfs_real: Migrate to the new Common::FS library

* vfs: Migrate to the new Common::FS library

* vfs_libzip: Migrate to the new Common::FS library

* service: bcat: Migrate to the new Common::FS library

* yuzu: main: Migrate to the new Common::FS library

* vfs_real: Delete the contents of an existing file in CreateFile

Current usages of CreateFile expect to delete the contents of an existing file, retain this behavior for now.

* input_profiles: Don't iterate the input profile dir if it does not exist

Silences an error produced in the log if the directory does not exist.

* game_list_worker: Skip parsing file if the returned VfsFile is nullptr

Prevents crashes in GetLoader when the virtual file is nullptr

* common: fs: Validate paths for path length

* service: filesystem: Open the mod load directory as read only
2021-05-25 19:32:56 -04:00

116 lines
3.7 KiB
C++

// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <cstddef>
#include <cstring>
#include <iterator>
#include <utility>
#include "common/logging/log.h"
#include "core/file_sys/partition_filesystem.h"
#include "core/file_sys/vfs_offset.h"
#include "core/loader/loader.h"
namespace FileSys {
bool PartitionFilesystem::Header::HasValidMagicValue() const {
return magic == Common::MakeMagic('H', 'F', 'S', '0') ||
magic == Common::MakeMagic('P', 'F', 'S', '0');
}
PartitionFilesystem::PartitionFilesystem(VirtualFile file) {
// At least be as large as the header
if (file->GetSize() < sizeof(Header)) {
status = Loader::ResultStatus::ErrorBadPFSHeader;
return;
}
// For cartridges, HFSs can get very large, so we need to calculate the size up to
// the actual content itself instead of just blindly reading in the entire file.
if (sizeof(Header) != file->ReadObject(&pfs_header)) {
status = Loader::ResultStatus::ErrorBadPFSHeader;
return;
}
if (!pfs_header.HasValidMagicValue()) {
status = Loader::ResultStatus::ErrorBadPFSHeader;
return;
}
is_hfs = pfs_header.magic == Common::MakeMagic('H', 'F', 'S', '0');
std::size_t entry_size = is_hfs ? sizeof(HFSEntry) : sizeof(PFSEntry);
std::size_t metadata_size =
sizeof(Header) + (pfs_header.num_entries * entry_size) + pfs_header.strtab_size;
// Actually read in now...
std::vector<u8> file_data = file->ReadBytes(metadata_size);
const std::size_t total_size = file_data.size();
if (total_size != metadata_size) {
status = Loader::ResultStatus::ErrorIncorrectPFSFileSize;
return;
}
std::size_t entries_offset = sizeof(Header);
std::size_t strtab_offset = entries_offset + (pfs_header.num_entries * entry_size);
content_offset = strtab_offset + pfs_header.strtab_size;
for (u16 i = 0; i < pfs_header.num_entries; i++) {
FSEntry entry;
memcpy(&entry, &file_data[entries_offset + (i * entry_size)], sizeof(FSEntry));
std::string name(
reinterpret_cast<const char*>(&file_data[strtab_offset + entry.strtab_offset]));
offsets.insert_or_assign(name, content_offset + entry.offset);
sizes.insert_or_assign(name, entry.size);
pfs_files.emplace_back(std::make_shared<OffsetVfsFile>(
file, entry.size, content_offset + entry.offset, std::move(name)));
}
status = Loader::ResultStatus::Success;
}
PartitionFilesystem::~PartitionFilesystem() = default;
Loader::ResultStatus PartitionFilesystem::GetStatus() const {
return status;
}
std::map<std::string, u64> PartitionFilesystem::GetFileOffsets() const {
return offsets;
}
std::map<std::string, u64> PartitionFilesystem::GetFileSizes() const {
return sizes;
}
std::vector<VirtualFile> PartitionFilesystem::GetFiles() const {
return pfs_files;
}
std::vector<VirtualDir> PartitionFilesystem::GetSubdirectories() const {
return {};
}
std::string PartitionFilesystem::GetName() const {
return is_hfs ? "HFS0" : "PFS0";
}
VirtualDir PartitionFilesystem::GetParentDirectory() const {
// TODO(DarkLordZach): Add support for nested containers.
return nullptr;
}
void PartitionFilesystem::PrintDebugInfo() const {
LOG_DEBUG(Service_FS, "Magic: {:.4}", pfs_header.magic);
LOG_DEBUG(Service_FS, "Files: {}", pfs_header.num_entries);
for (u32 i = 0; i < pfs_header.num_entries; i++) {
LOG_DEBUG(Service_FS, " > File {}: {} (0x{:X} bytes)", i,
pfs_files[i]->GetName(), pfs_files[i]->GetSize());
}
}
} // namespace FileSys