14e2df5610
This converts it into a regular constructor parameter. There's no need to make this a template parameter on the class when it functions perfectly well as a constructor argument. This also reduces the amount of code bloat produced by the compiler, as it doesn't need to generate the same code for multiple different instantiations of the same class type, but with a different fill value.
140 lines
4.4 KiB
C++
140 lines
4.4 KiB
C++
// Copyright 2018 yuzu emulator team
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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 "common/common_types.h"
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#include "common/swap.h"
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#include "core/file_sys/fsmitm_romfsbuild.h"
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#include "core/file_sys/romfs.h"
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#include "core/file_sys/vfs.h"
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#include "core/file_sys/vfs_concat.h"
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#include "core/file_sys/vfs_offset.h"
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#include "core/file_sys/vfs_vector.h"
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namespace FileSys {
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constexpr u32 ROMFS_ENTRY_EMPTY = 0xFFFFFFFF;
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struct TableLocation {
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u64_le offset;
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u64_le size;
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};
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static_assert(sizeof(TableLocation) == 0x10, "TableLocation has incorrect size.");
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struct RomFSHeader {
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u64_le header_size;
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TableLocation directory_hash;
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TableLocation directory_meta;
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TableLocation file_hash;
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TableLocation file_meta;
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u64_le data_offset;
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};
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static_assert(sizeof(RomFSHeader) == 0x50, "RomFSHeader has incorrect size.");
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struct DirectoryEntry {
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u32_le sibling;
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u32_le child_dir;
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u32_le child_file;
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u32_le hash;
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u32_le name_length;
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};
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static_assert(sizeof(DirectoryEntry) == 0x14, "DirectoryEntry has incorrect size.");
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struct FileEntry {
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u32_le parent;
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u32_le sibling;
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u64_le offset;
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u64_le size;
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u32_le hash;
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u32_le name_length;
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};
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static_assert(sizeof(FileEntry) == 0x20, "FileEntry has incorrect size.");
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template <typename Entry>
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static std::pair<Entry, std::string> GetEntry(const VirtualFile& file, std::size_t offset) {
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Entry entry{};
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if (file->ReadObject(&entry, offset) != sizeof(Entry))
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return {};
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std::string string(entry.name_length, '\0');
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if (file->ReadArray(&string[0], string.size(), offset + sizeof(Entry)) != string.size())
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return {};
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return {entry, string};
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}
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void ProcessFile(VirtualFile file, std::size_t file_offset, std::size_t data_offset,
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u32 this_file_offset, std::shared_ptr<VectorVfsDirectory> parent) {
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while (true) {
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auto entry = GetEntry<FileEntry>(file, file_offset + this_file_offset);
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parent->AddFile(std::make_shared<OffsetVfsFile>(
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file, entry.first.size, entry.first.offset + data_offset, entry.second));
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if (entry.first.sibling == ROMFS_ENTRY_EMPTY)
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break;
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this_file_offset = entry.first.sibling;
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}
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}
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void ProcessDirectory(VirtualFile file, std::size_t dir_offset, std::size_t file_offset,
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std::size_t data_offset, u32 this_dir_offset,
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std::shared_ptr<VectorVfsDirectory> parent) {
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while (true) {
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auto entry = GetEntry<DirectoryEntry>(file, dir_offset + this_dir_offset);
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auto current = std::make_shared<VectorVfsDirectory>(
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std::vector<VirtualFile>{}, std::vector<VirtualDir>{}, entry.second);
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if (entry.first.child_file != ROMFS_ENTRY_EMPTY) {
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ProcessFile(file, file_offset, data_offset, entry.first.child_file, current);
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}
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if (entry.first.child_dir != ROMFS_ENTRY_EMPTY) {
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ProcessDirectory(file, dir_offset, file_offset, data_offset, entry.first.child_dir,
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current);
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}
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parent->AddDirectory(current);
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if (entry.first.sibling == ROMFS_ENTRY_EMPTY)
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break;
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this_dir_offset = entry.first.sibling;
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}
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}
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VirtualDir ExtractRomFS(VirtualFile file, RomFSExtractionType type) {
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RomFSHeader header{};
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if (file->ReadObject(&header) != sizeof(RomFSHeader))
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return nullptr;
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if (header.header_size != sizeof(RomFSHeader))
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return nullptr;
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const u64 file_offset = header.file_meta.offset;
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const u64 dir_offset = header.directory_meta.offset + 4;
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auto root =
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std::make_shared<VectorVfsDirectory>(std::vector<VirtualFile>{}, std::vector<VirtualDir>{},
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file->GetName(), file->GetContainingDirectory());
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ProcessDirectory(file, dir_offset, file_offset, header.data_offset, 0, root);
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VirtualDir out = std::move(root);
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while (out->GetSubdirectories().size() == 1 && out->GetFiles().empty()) {
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if (out->GetSubdirectories().front()->GetName() == "data" &&
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type == RomFSExtractionType::Truncated)
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break;
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out = out->GetSubdirectories().front();
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}
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return out;
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}
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VirtualFile CreateRomFS(VirtualDir dir) {
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if (dir == nullptr)
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return nullptr;
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RomFSBuildContext ctx{dir};
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return ConcatenateFiles(0, ctx.Build(), dir->GetName());
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}
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} // namespace FileSys
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