Merge pull request #1401 from lioncash/vfs

vfs: Minor cleanup related changes to layered VFS code

src/core/core.cpp

@@ -64,7 +64,7 @@ FileSys::VirtualFile GetGameFileFromPath(const FileSys::VirtualFilesystem& vfs,
         if (concat.empty())
             return nullptr;
 
-        return FileSys::ConcatenateFiles(concat, dir->GetName());
+        return FileSys::ConcatenatedVfsFile::MakeConcatenatedFile(concat, dir->GetName());
     }
 
     return vfs->OpenFile(path, FileSys::Mode::Read);

src/core/file_sys/fsmitm_romfsbuild.cpp

@@ -73,7 +73,7 @@ static_assert(sizeof(RomFSFileEntry) == 0x20, "RomFSFileEntry has incorrect size
 struct RomFSBuildFileContext;
 
 struct RomFSBuildDirectoryContext {
-    std::string path = "";
+    std::string path;
     u32 cur_path_ofs = 0;
     u32 path_len = 0;
     u32 entry_offset = 0;
@@ -84,7 +84,7 @@ struct RomFSBuildDirectoryContext {
 };
 
 struct RomFSBuildFileContext {
-    std::string path = "";
+    std::string path;
     u32 cur_path_ofs = 0;
     u32 path_len = 0;
     u32 entry_offset = 0;
@@ -92,12 +92,10 @@ struct RomFSBuildFileContext {
     u64 size = 0;
     std::shared_ptr<RomFSBuildDirectoryContext> parent;
     std::shared_ptr<RomFSBuildFileContext> sibling;
-    VirtualFile source = nullptr;
-
-    RomFSBuildFileContext() : path(""), cur_path_ofs(0), path_len(0) {}
+    VirtualFile source;
 };
 
-static u32 romfs_calc_path_hash(u32 parent, std::string path, u32 start, size_t path_len) {
+static u32 romfs_calc_path_hash(u32 parent, std::string path, u32 start, std::size_t path_len) {
     u32 hash = parent ^ 123456789;
     for (u32 i = 0; i < path_len; i++) {
         hash = (hash >> 5) | (hash << 27);
@@ -107,13 +105,16 @@ static u32 romfs_calc_path_hash(u32 parent, std::string path, u32 start, size_t
     return hash;
 }
 
-static u32 romfs_get_hash_table_count(u32 num_entries) {
+static u64 romfs_get_hash_table_count(u64 num_entries) {
     if (num_entries < 3) {
         return 3;
-    } else if (num_entries < 19) {
+    }
+
+    if (num_entries < 19) {
         return num_entries | 1;
     }
-    u32 count = num_entries;
+
+    u64 count = num_entries;
     while (count % 2 == 0 || count % 3 == 0 || count % 5 == 0 || count % 7 == 0 ||
            count % 11 == 0 || count % 13 == 0 || count % 17 == 0) {
         count++;
@@ -139,7 +140,7 @@ void RomFSBuildContext::VisitDirectory(VirtualDir root_romfs,
             const auto child = std::make_shared<RomFSBuildDirectoryContext>();
             // Set child's path.
             child->cur_path_ofs = parent->path_len + 1;
-            child->path_len = child->cur_path_ofs + kv.first.size();
+            child->path_len = child->cur_path_ofs + static_cast<u32>(kv.first.size());
             child->path = parent->path + "/" + kv.first;
 
             // Sanity check on path_len
@@ -152,7 +153,7 @@ void RomFSBuildContext::VisitDirectory(VirtualDir root_romfs,
             const auto child = std::make_shared<RomFSBuildFileContext>();
             // Set child's path.
             child->cur_path_ofs = parent->path_len + 1;
-            child->path_len = child->cur_path_ofs + kv.first.size();
+            child->path_len = child->cur_path_ofs + static_cast<u32>(kv.first.size());
             child->path = parent->path + "/" + kv.first;
 
             // Sanity check on path_len
@@ -219,8 +220,8 @@ RomFSBuildContext::RomFSBuildContext(VirtualDir base_) : base(std::move(base_))
 RomFSBuildContext::~RomFSBuildContext() = default;
 
 std::map<u64, VirtualFile> RomFSBuildContext::Build() {
-    const auto dir_hash_table_entry_count = romfs_get_hash_table_count(num_dirs);
-    const auto file_hash_table_entry_count = romfs_get_hash_table_count(num_files);
+    const u64 dir_hash_table_entry_count = romfs_get_hash_table_count(num_dirs);
+    const u64 file_hash_table_entry_count = romfs_get_hash_table_count(num_files);
     dir_hash_table_size = 4 * dir_hash_table_entry_count;
     file_hash_table_size = 4 * file_hash_table_entry_count;
 
@@ -233,12 +234,6 @@ std::map<u64, VirtualFile> RomFSBuildContext::Build() {
     std::vector<u8> dir_table(dir_table_size);
     std::vector<u8> file_table(file_table_size);
 
-    // Clear out hash tables.
-    for (u32 i = 0; i < dir_hash_table_entry_count; i++)
-        dir_hash_table[i] = ROMFS_ENTRY_EMPTY;
-    for (u32 i = 0; i < file_hash_table_entry_count; i++)
-        file_hash_table[i] = ROMFS_ENTRY_EMPTY;
-
     std::shared_ptr<RomFSBuildFileContext> cur_file;
 
     // Determine file offsets.
@@ -355,7 +350,7 @@ std::map<u64, VirtualFile> RomFSBuildContext::Build() {
 
     std::vector<u8> metadata(file_hash_table_size + file_table_size + dir_hash_table_size +
                              dir_table_size);
-    auto index = 0;
+    std::size_t index = 0;
     std::memcpy(metadata.data(), dir_hash_table.data(), dir_hash_table.size() * sizeof(u32));
     index += dir_hash_table.size() * sizeof(u32);
     std::memcpy(metadata.data() + index, dir_table.data(), dir_table.size());

src/core/file_sys/patch_manager.cpp

@@ -70,38 +70,40 @@ VirtualDir PatchManager::PatchExeFS(VirtualDir exefs) const {
 
 static void ApplyLayeredFS(VirtualFile& romfs, u64 title_id, ContentRecordType type) {
     const auto load_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
-    if (type == ContentRecordType::Program && load_dir != nullptr && load_dir->GetSize() > 0) {
-        auto extracted = ExtractRomFS(romfs);
-
-        if (extracted != nullptr) {
-            auto patch_dirs = load_dir->GetSubdirectories();
-            std::sort(patch_dirs.begin(), patch_dirs.end(),
-                      [](const VirtualDir& l, const VirtualDir& r) {
-                          return l->GetName() < r->GetName();
-                      });
-
-            std::vector<VirtualDir> layers;
-            layers.reserve(patch_dirs.size() + 1);
-            for (const auto& subdir : patch_dirs) {
-                auto romfs_dir = subdir->GetSubdirectory("romfs");
-                if (romfs_dir != nullptr)
-                    layers.push_back(std::move(romfs_dir));
-            }
+    if (type != ContentRecordType::Program || load_dir == nullptr || load_dir->GetSize() <= 0) {
+        return;
+    }
 
-            layers.push_back(std::move(extracted));
+    auto extracted = ExtractRomFS(romfs);
+    if (extracted == nullptr) {
+        return;
+    }
 
-            const auto layered = LayerDirectories(layers);
+    auto patch_dirs = load_dir->GetSubdirectories();
+    std::sort(patch_dirs.begin(), patch_dirs.end(),
+              [](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
 
-            if (layered != nullptr) {
-                auto packed = CreateRomFS(layered);
+    std::vector<VirtualDir> layers;
+    layers.reserve(patch_dirs.size() + 1);
+    for (const auto& subdir : patch_dirs) {
+        auto romfs_dir = subdir->GetSubdirectory("romfs");
+        if (romfs_dir != nullptr)
+            layers.push_back(std::move(romfs_dir));
+    }
+    layers.push_back(std::move(extracted));
 
-                if (packed != nullptr) {
-                    LOG_INFO(Loader, "    RomFS: LayeredFS patches applied successfully");
-                    romfs = std::move(packed);
-                }
-            }
-        }
+    auto layered = LayeredVfsDirectory::MakeLayeredDirectory(std::move(layers));
+    if (layered == nullptr) {
+        return;
+    }
+
+    auto packed = CreateRomFS(std::move(layered));
+    if (packed == nullptr) {
+        return;
     }
+
+    LOG_INFO(Loader, "    RomFS: LayeredFS patches applied successfully");
+    romfs = std::move(packed);
 }
 
 VirtualFile PatchManager::PatchRomFS(VirtualFile romfs, u64 ivfc_offset,

src/core/file_sys/registered_cache.cpp

@@ -125,7 +125,7 @@ VirtualFile RegisteredCache::OpenFileOrDirectoryConcat(const VirtualDir& dir,
             if (concat.empty())
                 return nullptr;
 
-            file = FileSys::ConcatenateFiles(concat, concat.front()->GetName());
+            file = ConcatenatedVfsFile::MakeConcatenatedFile(concat, concat.front()->GetName());
         }
 
         return file;

src/core/file_sys/romfs.cpp

@@ -134,7 +134,7 @@ VirtualFile CreateRomFS(VirtualDir dir) {
         return nullptr;
 
     RomFSBuildContext ctx{dir};
-    return ConcatenateFiles<0>(ctx.Build(), dir->GetName());
+    return ConcatenatedVfsFile::MakeConcatenatedFile(0, ctx.Build(), dir->GetName());
 }
 
 } // namespace FileSys

src/core/file_sys/vfs.cpp

@@ -463,14 +463,14 @@ bool DeepEquals(const VirtualFile& file1, const VirtualFile& file2, std::size_t
     return true;
 }
 
-bool VfsRawCopy(const VirtualFile& src, const VirtualFile& dest, size_t block_size) {
+bool VfsRawCopy(const VirtualFile& src, const VirtualFile& dest, std::size_t block_size) {
     if (src == nullptr || dest == nullptr || !src->IsReadable() || !dest->IsWritable())
         return false;
     if (!dest->Resize(src->GetSize()))
         return false;
 
     std::vector<u8> temp(std::min(block_size, src->GetSize()));
-    for (size_t i = 0; i < src->GetSize(); i += block_size) {
+    for (std::size_t i = 0; i < src->GetSize(); i += block_size) {
         const auto read = std::min(block_size, src->GetSize() - i);
         const auto block = src->Read(temp.data(), read, i);
 
@@ -481,7 +481,7 @@ bool VfsRawCopy(const VirtualFile& src, const VirtualFile& dest, size_t block_si
     return true;
 }
 
-bool VfsRawCopyD(const VirtualDir& src, const VirtualDir& dest, size_t block_size) {
+bool VfsRawCopyD(const VirtualDir& src, const VirtualDir& dest, std::size_t block_size) {
     if (src == nullptr || dest == nullptr || !src->IsReadable() || !dest->IsWritable())
         return false;
 

src/core/file_sys/vfs.h

@@ -315,18 +315,19 @@ public:
     bool Rename(std::string_view name) override;
 };
 
-// Compare the two files, byte-for-byte, in increments specificed by block_size
-bool DeepEquals(const VirtualFile& file1, const VirtualFile& file2, size_t block_size = 0x1000);
+// Compare the two files, byte-for-byte, in increments specified by block_size
+bool DeepEquals(const VirtualFile& file1, const VirtualFile& file2,
+                std::size_t block_size = 0x1000);
 
 // A method that copies the raw data between two different implementations of VirtualFile. If you
 // are using the same implementation, it is probably better to use the Copy method in the parent
 // directory of src/dest.
-bool VfsRawCopy(const VirtualFile& src, const VirtualFile& dest, size_t block_size = 0x1000);
+bool VfsRawCopy(const VirtualFile& src, const VirtualFile& dest, std::size_t block_size = 0x1000);
 
 // A method that performs a similar function to VfsRawCopy above, but instead copies entire
 // directories. It suffers the same performance penalties as above and an implementation-specific
 // Copy should always be preferred.
-bool VfsRawCopyD(const VirtualDir& src, const VirtualDir& dest, size_t block_size = 0x1000);
+bool VfsRawCopyD(const VirtualDir& src, const VirtualDir& dest, std::size_t block_size = 0x1000);
 
 // Checks if the directory at path relative to rel exists. If it does, returns that. If it does not
 // it attempts to create it and returns the new dir or nullptr on failure.

src/core/file_sys/vfs_concat.cpp

@@ -7,6 +7,7 @@
 
 #include "common/assert.h"
 #include "core/file_sys/vfs_concat.h"
+#include "core/file_sys/vfs_static.h"
 
 namespace FileSys {
 
@@ -22,15 +23,6 @@ static bool VerifyConcatenationMapContinuity(const std::map<u64, VirtualFile>& m
     return map.begin()->first == 0;
 }
 
-VirtualFile ConcatenateFiles(std::vector<VirtualFile> files, std::string name) {
-    if (files.empty())
-        return nullptr;
-    if (files.size() == 1)
-        return files[0];
-
-    return std::shared_ptr<VfsFile>(new ConcatenatedVfsFile(std::move(files), std::move(name)));
-}
-
 ConcatenatedVfsFile::ConcatenatedVfsFile(std::vector<VirtualFile> files_, std::string name)
     : name(std::move(name)) {
     std::size_t next_offset = 0;
@@ -47,6 +39,41 @@ ConcatenatedVfsFile::ConcatenatedVfsFile(std::map<u64, VirtualFile> files_, std:
 
 ConcatenatedVfsFile::~ConcatenatedVfsFile() = default;
 
+VirtualFile ConcatenatedVfsFile::MakeConcatenatedFile(std::vector<VirtualFile> files,
+                                                      std::string name) {
+    if (files.empty())
+        return nullptr;
+    if (files.size() == 1)
+        return files[0];
+
+    return std::shared_ptr<VfsFile>(new ConcatenatedVfsFile(std::move(files), std::move(name)));
+}
+
+VirtualFile ConcatenatedVfsFile::MakeConcatenatedFile(u8 filler_byte,
+                                                      std::map<u64, VirtualFile> files,
+                                                      std::string name) {
+    if (files.empty())
+        return nullptr;
+    if (files.size() == 1)
+        return files.begin()->second;
+
+    const auto last_valid = --files.end();
+    for (auto iter = files.begin(); iter != last_valid;) {
+        const auto old = iter++;
+        if (old->first + old->second->GetSize() != iter->first) {
+            files.emplace(old->first + old->second->GetSize(),
+                          std::make_shared<StaticVfsFile>(filler_byte, iter->first - old->first -
+                                                                           old->second->GetSize()));
+        }
+    }
+
+    // Ensure the map starts at offset 0 (start of file), otherwise pad to fill.
+    if (files.begin()->first != 0)
+        files.emplace(0, std::make_shared<StaticVfsFile>(filler_byte, files.begin()->first));
+
+    return std::shared_ptr<VfsFile>(new ConcatenatedVfsFile(std::move(files), std::move(name)));
+}
+
 std::string ConcatenatedVfsFile::GetName() const {
     if (files.empty())
         return "";

src/core/file_sys/vfs_concat.h

@@ -7,26 +7,27 @@
 #include <map>
 #include <memory>
 #include <string_view>
-#include <boost/container/flat_map.hpp>
 #include "core/file_sys/vfs.h"
-#include "core/file_sys/vfs_static.h"
 
 namespace FileSys {
 
 // Class that wraps multiple vfs files and concatenates them, making reads seamless. Currently
 // read-only.
 class ConcatenatedVfsFile : public VfsFile {
-    friend VirtualFile ConcatenateFiles(std::vector<VirtualFile> files, std::string name);
-
-    template <u8 filler_byte>
-    friend VirtualFile ConcatenateFiles(std::map<u64, VirtualFile> files, std::string name);
-
     ConcatenatedVfsFile(std::vector<VirtualFile> files, std::string name);
     ConcatenatedVfsFile(std::map<u64, VirtualFile> files, std::string name);
 
 public:
     ~ConcatenatedVfsFile() override;
 
+    /// Wrapper function to allow for more efficient handling of files.size() == 0, 1 cases.
+    static VirtualFile MakeConcatenatedFile(std::vector<VirtualFile> files, std::string name);
+
+    /// Convenience function that turns a map of offsets to files into a concatenated file, filling
+    /// gaps with a given filler byte.
+    static VirtualFile MakeConcatenatedFile(u8 filler_byte, std::map<u64, VirtualFile> files,
+                                            std::string name);
+
     std::string GetName() const override;
     std::size_t GetSize() const override;
     bool Resize(std::size_t new_size) override;
@@ -43,33 +44,4 @@ private:
     std::string name;
 };
 
-// Wrapper function to allow for more efficient handling of files.size() == 0, 1 cases.
-VirtualFile ConcatenateFiles(std::vector<VirtualFile> files, std::string name);
-
-// Convenience function that turns a map of offsets to files into a concatenated file, filling gaps
-// with template parameter.
-template <u8 filler_byte>
-VirtualFile ConcatenateFiles(std::map<u64, VirtualFile> files, std::string name) {
-    if (files.empty())
-        return nullptr;
-    if (files.size() == 1)
-        return files.begin()->second;
-
-    const auto last_valid = --files.end();
-    for (auto iter = files.begin(); iter != last_valid;) {
-        const auto old = iter++;
-        if (old->first + old->second->GetSize() != iter->first) {
-            files.emplace(old->first + old->second->GetSize(),
-                          std::make_shared<StaticVfsFile<filler_byte>>(iter->first - old->first -
-                                                                       old->second->GetSize()));
-        }
-    }
-
-    // Ensure the map starts at offset 0 (start of file), otherwise pad to fill.
-    if (files.begin()->first != 0)
-        files.emplace(0, std::make_shared<StaticVfsFile<filler_byte>>(files.begin()->first));
-
-    return std::shared_ptr<VfsFile>(new ConcatenatedVfsFile(std::move(files), std::move(name)));
-}
-
 } // namespace FileSys

src/core/file_sys/vfs_layered.cpp

@@ -8,7 +8,13 @@
 
 namespace FileSys {
 
-VirtualDir LayerDirectories(std::vector<VirtualDir> dirs, std::string name) {
+LayeredVfsDirectory::LayeredVfsDirectory(std::vector<VirtualDir> dirs, std::string name)
+    : dirs(std::move(dirs)), name(std::move(name)) {}
+
+LayeredVfsDirectory::~LayeredVfsDirectory() = default;
+
+VirtualDir LayeredVfsDirectory::MakeLayeredDirectory(std::vector<VirtualDir> dirs,
+                                                     std::string name) {
     if (dirs.empty())
         return nullptr;
     if (dirs.size() == 1)
@@ -17,11 +23,6 @@ VirtualDir LayerDirectories(std::vector<VirtualDir> dirs, std::string name) {
     return std::shared_ptr<VfsDirectory>(new LayeredVfsDirectory(std::move(dirs), std::move(name)));
 }
 
-LayeredVfsDirectory::LayeredVfsDirectory(std::vector<VirtualDir> dirs, std::string name)
-    : dirs(std::move(dirs)), name(std::move(name)) {}
-
-LayeredVfsDirectory::~LayeredVfsDirectory() = default;
-
 std::shared_ptr<VfsFile> LayeredVfsDirectory::GetFileRelative(std::string_view path) const {
     for (const auto& layer : dirs) {
         const auto file = layer->GetFileRelative(path);
@@ -41,7 +42,7 @@ std::shared_ptr<VfsDirectory> LayeredVfsDirectory::GetDirectoryRelative(
             out.push_back(std::move(dir));
     }
 
-    return LayerDirectories(std::move(out));
+    return MakeLayeredDirectory(std::move(out));
 }
 
 std::shared_ptr<VfsFile> LayeredVfsDirectory::GetFile(std::string_view name) const {

src/core/file_sys/vfs_layered.h

@@ -9,20 +9,18 @@
 
 namespace FileSys {
 
-// Wrapper function to allow for more efficient handling of dirs.size() == 0, 1 cases.
-VirtualDir LayerDirectories(std::vector<VirtualDir> dirs, std::string name = "");
-
 // Class that stacks multiple VfsDirectories on top of each other, attempting to read from the first
 // one and falling back to the one after. The highest priority directory (overwrites all others)
 // should be element 0 in the dirs vector.
 class LayeredVfsDirectory : public VfsDirectory {
-    friend VirtualDir LayerDirectories(std::vector<VirtualDir> dirs, std::string name);
-
     LayeredVfsDirectory(std::vector<VirtualDir> dirs, std::string name);
 
 public:
     ~LayeredVfsDirectory() override;
 
+    /// Wrapper function to allow for more efficient handling of dirs.size() == 0, 1 cases.
+    static VirtualDir MakeLayeredDirectory(std::vector<VirtualDir> dirs, std::string name = "");
+
     std::shared_ptr<VfsFile> GetFileRelative(std::string_view path) const override;
     std::shared_ptr<VfsDirectory> GetDirectoryRelative(std::string_view path) const override;
     std::shared_ptr<VfsFile> GetFile(std::string_view name) const override;

src/core/file_sys/vfs_static.h

@@ -12,21 +12,21 @@
 
 namespace FileSys {
 
-template <u8 value>
 class StaticVfsFile : public VfsFile {
 public:
-    explicit StaticVfsFile(size_t size = 0, std::string name = "", VirtualDir parent = nullptr)
-        : size(size), name(std::move(name)), parent(std::move(parent)) {}
+    explicit StaticVfsFile(u8 value, std::size_t size = 0, std::string name = "",
+                           VirtualDir parent = nullptr)
+        : value{value}, size{size}, name{std::move(name)}, parent{std::move(parent)} {}
 
     std::string GetName() const override {
         return name;
     }
 
-    size_t GetSize() const override {
+    std::size_t GetSize() const override {
         return size;
     }
 
-    bool Resize(size_t new_size) override {
+    bool Resize(std::size_t new_size) override {
         size = new_size;
         return true;
     }
@@ -43,23 +43,23 @@ public:
         return true;
     }
 
-    size_t Read(u8* data, size_t length, size_t offset) const override {
+    std::size_t Read(u8* data, std::size_t length, std::size_t offset) const override {
         const auto read = std::min(length, size - offset);
         std::fill(data, data + read, value);
         return read;
     }
 
-    size_t Write(const u8* data, size_t length, size_t offset) override {
+    std::size_t Write(const u8* data, std::size_t length, std::size_t offset) override {
         return 0;
     }
 
-    boost::optional<u8> ReadByte(size_t offset) const override {
+    boost::optional<u8> ReadByte(std::size_t offset) const override {
         if (offset < size)
             return value;
         return boost::none;
     }
 
-    std::vector<u8> ReadBytes(size_t length, size_t offset) const override {
+    std::vector<u8> ReadBytes(std::size_t length, std::size_t offset) const override {
         const auto read = std::min(length, size - offset);
         return std::vector<u8>(read, value);
     }
@@ -70,7 +70,8 @@ public:
     }
 
 private:
-    size_t size;
+    u8 value;
+    std::size_t size;
     std::string name;
     VirtualDir parent;
 };

src/core/file_sys/vfs_vector.cpp

@@ -9,7 +9,7 @@
 
 namespace FileSys {
 VectorVfsFile::VectorVfsFile(std::vector<u8> initial_data, std::string name, VirtualDir parent)
-    : data(std::move(initial_data)), name(std::move(name)), parent(std::move(parent)) {}
+    : data(std::move(initial_data)), parent(std::move(parent)), name(std::move(name)) {}
 
 VectorVfsFile::~VectorVfsFile() = default;
 
@@ -38,13 +38,13 @@ bool VectorVfsFile::IsReadable() const {
     return true;
 }
 
-size_t VectorVfsFile::Read(u8* data_, size_t length, size_t offset) const {
+std::size_t VectorVfsFile::Read(u8* data_, std::size_t length, std::size_t offset) const {
     const auto read = std::min(length, data.size() - offset);
     std::memcpy(data_, data.data() + offset, read);
     return read;
 }
 
-size_t VectorVfsFile::Write(const u8* data_, size_t length, size_t offset) {
+std::size_t VectorVfsFile::Write(const u8* data_, std::size_t length, std::size_t offset) {
     if (offset + length > data.size())
         data.resize(offset + length);
     const auto write = std::min(length, data.size() - offset);

src/core/file_sys/vfs_vector.h

@@ -16,13 +16,13 @@ public:
     ~VectorVfsFile() override;
 
     std::string GetName() const override;
-    size_t GetSize() const override;
-    bool Resize(size_t new_size) override;
+    std::size_t GetSize() const override;
+    bool Resize(std::size_t new_size) override;
     std::shared_ptr<VfsDirectory> GetContainingDirectory() const override;
     bool IsWritable() const override;
     bool IsReadable() const override;
-    size_t Read(u8* data, size_t length, size_t offset) const override;
-    size_t Write(const u8* data, size_t length, size_t offset) override;
+    std::size_t Read(u8* data, std::size_t length, std::size_t offset) const override;
+    std::size_t Write(const u8* data, std::size_t length, std::size_t offset) override;
     bool Rename(std::string_view name) override;
 
     virtual void Assign(std::vector<u8> new_data);

src/yuzu/main.cpp

@@ -756,11 +756,51 @@ void GMainWindow::OnGameListOpenFolder(u64 program_id, GameListOpenTarget target
     QDesktopServices::openUrl(QUrl::fromLocalFile(qpath));
 }
 
+static std::size_t CalculateRomFSEntrySize(const FileSys::VirtualDir& dir, bool full) {
+    std::size_t out = 0;
+
+    for (const auto& subdir : dir->GetSubdirectories()) {
+        out += 1 + CalculateRomFSEntrySize(subdir, full);
+    }
+
+    return out + (full ? dir->GetFiles().size() : 0);
+}
+
+static bool RomFSRawCopy(QProgressDialog& dialog, const FileSys::VirtualDir& src,
+                         const FileSys::VirtualDir& dest, std::size_t block_size, bool full) {
+    if (src == nullptr || dest == nullptr || !src->IsReadable() || !dest->IsWritable())
+        return false;
+    if (dialog.wasCanceled())
+        return false;
+
+    if (full) {
+        for (const auto& file : src->GetFiles()) {
+            const auto out = VfsDirectoryCreateFileWrapper(dest, file->GetName());
+            if (!FileSys::VfsRawCopy(file, out, block_size))
+                return false;
+            dialog.setValue(dialog.value() + 1);
+            if (dialog.wasCanceled())
+                return false;
+        }
+    }
+
+    for (const auto& dir : src->GetSubdirectories()) {
+        const auto out = dest->CreateSubdirectory(dir->GetName());
+        if (!RomFSRawCopy(dialog, dir, out, block_size, full))
+            return false;
+        dialog.setValue(dialog.value() + 1);
+        if (dialog.wasCanceled())
+            return false;
+    }
+
+    return true;
+}
+
 void GMainWindow::OnGameListDumpRomFS(u64 program_id, const std::string& game_path) {
     const auto path = fmt::format("{}{:016X}/romfs",
                                   FileUtil::GetUserPath(FileUtil::UserPath::DumpDir), program_id);
 
-    auto failed = [this, &path]() {
+    const auto failed = [this, &path] {
         QMessageBox::warning(this, tr("RomFS Extraction Failed!"),
                              tr("There was an error copying the RomFS files or the user "
                                 "cancelled the operation."));
@@ -808,53 +848,13 @@ void GMainWindow::OnGameListDumpRomFS(u64 program_id, const std::string& game_pa
         failed();
 
     const auto full = res == "Full";
-
-    const static std::function<size_t(const FileSys::VirtualDir&, bool)> calculate_entry_size =
-        [](const FileSys::VirtualDir& dir, bool full) {
-            size_t out = 0;
-            for (const auto& subdir : dir->GetSubdirectories())
-                out += 1 + calculate_entry_size(subdir, full);
-            return out + full ? dir->GetFiles().size() : 0;
-        };
-    const auto entry_size = calculate_entry_size(extracted, full);
+    const auto entry_size = CalculateRomFSEntrySize(extracted, full);
 
     QProgressDialog progress(tr("Extracting RomFS..."), tr("Cancel"), 0, entry_size, this);
     progress.setWindowModality(Qt::WindowModal);
     progress.setMinimumDuration(100);
 
-    const static std::function<bool(QProgressDialog&, const FileSys::VirtualDir&,
-                                    const FileSys::VirtualDir&, size_t, bool)>
-        qt_raw_copy = [](QProgressDialog& dialog, const FileSys::VirtualDir& src,
-                         const FileSys::VirtualDir& dest, size_t block_size, bool full) {
-            if (src == nullptr || dest == nullptr || !src->IsReadable() || !dest->IsWritable())
-                return false;
-            if (dialog.wasCanceled())
-                return false;
-
-            if (full) {
-                for (const auto& file : src->GetFiles()) {
-                    const auto out = VfsDirectoryCreateFileWrapper(dest, file->GetName());
-                    if (!FileSys::VfsRawCopy(file, out, block_size))
-                        return false;
-                    dialog.setValue(dialog.value() + 1);
-                    if (dialog.wasCanceled())
-                        return false;
-                }
-            }
-
-            for (const auto& dir : src->GetSubdirectories()) {
-                const auto out = dest->CreateSubdirectory(dir->GetName());
-                if (!qt_raw_copy(dialog, dir, out, block_size, full))
-                    return false;
-                dialog.setValue(dialog.value() + 1);
-                if (dialog.wasCanceled())
-                    return false;
-            }
-
-            return true;
-        };
-
-    if (qt_raw_copy(progress, extracted, out, 0x400000, full)) {
+    if (RomFSRawCopy(progress, extracted, out, 0x400000, full)) {
         progress.close();
         QMessageBox::information(this, tr("RomFS Extraction Succeeded!"),
                                  tr("The operation completed successfully."));
@@ -931,7 +931,7 @@ void GMainWindow::OnMenuInstallToNAND() {
     }
 
     const auto qt_raw_copy = [this](const FileSys::VirtualFile& src,
-                                    const FileSys::VirtualFile& dest, size_t block_size) {
+                                    const FileSys::VirtualFile& dest, std::size_t block_size) {
         if (src == nullptr || dest == nullptr)
             return false;
         if (!dest->Resize(src->GetSize()))