3
0
Fork 0
forked from suyu/suyu
suyu/src/core/file_sys/partition_filesystem.cpp
Morph 99ceb03a1c general: Convert source file copyright comments over to SPDX
This formats all copyright comments according to SPDX formatting guidelines.
Additionally, this resolves the remaining GPLv2 only licensed files by relicensing them to GPLv2.0-or-later.
2022-04-23 05:55:32 -04:00

115 lines
3.7 KiB
C++

// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#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