loader: Resolve instances of variable shadowing

Eliminates variable shadowing cases across all the loaders to bring us
closer to enabling variable shadowing as an error in core.

src/core/loader/deconstructed_rom_directory.cpp

@@ -24,10 +24,10 @@ namespace Loader {
 AppLoader_DeconstructedRomDirectory::AppLoader_DeconstructedRomDirectory(FileSys::VirtualFile file_,
                                                                          bool override_update)
     : AppLoader(std::move(file_)), override_update(override_update) {
-    const auto dir = file->GetContainingDirectory();
+    const auto file_dir = file->GetContainingDirectory();
 
     // Title ID
-    const auto npdm = dir->GetFile("main.npdm");
+    const auto npdm = file_dir->GetFile("main.npdm");
     if (npdm != nullptr) {
         const auto res = metadata.Load(npdm);
         if (res == ResultStatus::Success)
@@ -37,7 +37,7 @@ AppLoader_DeconstructedRomDirectory::AppLoader_DeconstructedRomDirectory(FileSys
     // Icon
     FileSys::VirtualFile icon_file = nullptr;
     for (const auto& language : FileSys::LANGUAGE_NAMES) {
-        icon_file = dir->GetFile("icon_" + std::string(language) + ".dat");
+        icon_file = file_dir->GetFile("icon_" + std::string(language) + ".dat");
         if (icon_file != nullptr) {
             icon_data = icon_file->ReadAllBytes();
             break;
@@ -46,7 +46,7 @@ AppLoader_DeconstructedRomDirectory::AppLoader_DeconstructedRomDirectory(FileSys
 
     if (icon_data.empty()) {
         // Any png, jpeg, or bmp file
-        const auto& files = dir->GetFiles();
+        const auto& files = file_dir->GetFiles();
         const auto icon_iter =
             std::find_if(files.begin(), files.end(), [](const FileSys::VirtualFile& file) {
                 return file->GetExtension() == "png" || file->GetExtension() == "jpg" ||
@@ -57,9 +57,9 @@ AppLoader_DeconstructedRomDirectory::AppLoader_DeconstructedRomDirectory(FileSys
     }
 
     // Metadata
-    FileSys::VirtualFile nacp_file = dir->GetFile("control.nacp");
+    FileSys::VirtualFile nacp_file = file_dir->GetFile("control.nacp");
     if (nacp_file == nullptr) {
-        const auto& files = dir->GetFiles();
+        const auto& files = file_dir->GetFiles();
         const auto nacp_iter =
             std::find_if(files.begin(), files.end(), [](const FileSys::VirtualFile& file) {
                 return file->GetExtension() == "nacp";
@@ -200,17 +200,21 @@ AppLoader_DeconstructedRomDirectory::LoadResult AppLoader_DeconstructedRomDirect
             LoadParameters{metadata.GetMainThreadPriority(), metadata.GetMainThreadStackSize()}};
 }
 
-ResultStatus AppLoader_DeconstructedRomDirectory::ReadRomFS(FileSys::VirtualFile& dir) {
+ResultStatus AppLoader_DeconstructedRomDirectory::ReadRomFS(FileSys::VirtualFile& out_dir) {
-    if (romfs == nullptr)
+    if (romfs == nullptr) {
         return ResultStatus::ErrorNoRomFS;
-    dir = romfs;
+    }
+
+    out_dir = romfs;
     return ResultStatus::Success;
 }
 
-ResultStatus AppLoader_DeconstructedRomDirectory::ReadIcon(std::vector<u8>& buffer) {
+ResultStatus AppLoader_DeconstructedRomDirectory::ReadIcon(std::vector<u8>& out_buffer) {
-    if (icon_data.empty())
+    if (icon_data.empty()) {
         return ResultStatus::ErrorNoIcon;
-    buffer = icon_data;
+    }
+
+    out_buffer = icon_data;
     return ResultStatus::Success;
 }
 
@@ -219,10 +223,12 @@ ResultStatus AppLoader_DeconstructedRomDirectory::ReadProgramId(u64& out_program
     return ResultStatus::Success;
 }
 
-ResultStatus AppLoader_DeconstructedRomDirectory::ReadTitle(std::string& title) {
+ResultStatus AppLoader_DeconstructedRomDirectory::ReadTitle(std::string& out_title) {
-    if (name.empty())
+    if (name.empty()) {
         return ResultStatus::ErrorNoControl;
-    title = name;
+    }
+
+    out_title = name;
     return ResultStatus::Success;
 }
 
@@ -230,12 +236,12 @@ bool AppLoader_DeconstructedRomDirectory::IsRomFSUpdatable() const {
     return false;
 }
 
-ResultStatus AppLoader_DeconstructedRomDirectory::ReadNSOModules(Modules& modules) {
+ResultStatus AppLoader_DeconstructedRomDirectory::ReadNSOModules(Modules& out_modules) {
     if (!is_loaded) {
         return ResultStatus::ErrorNotInitialized;
     }
 
-    modules = this->modules;
+    out_modules = this->modules;
     return ResultStatus::Success;
 }
 

src/core/loader/deconstructed_rom_directory.h

@@ -43,13 +43,13 @@ public:
 
     LoadResult Load(Kernel::Process& process, Core::System& system) override;
 
-    ResultStatus ReadRomFS(FileSys::VirtualFile& dir) override;
+    ResultStatus ReadRomFS(FileSys::VirtualFile& out_dir) override;
-    ResultStatus ReadIcon(std::vector<u8>& buffer) override;
+    ResultStatus ReadIcon(std::vector<u8>& out_buffer) override;
     ResultStatus ReadProgramId(u64& out_program_id) override;
     ResultStatus ReadTitle(std::string& title) override;
     bool IsRomFSUpdatable() const override;
 
-    ResultStatus ReadNSOModules(Modules& modules) override;
+    ResultStatus ReadNSOModules(Modules& out_modules) override;
 
 private:
     FileSys::ProgramMetadata metadata;

src/core/loader/elf.cpp

@@ -364,21 +364,24 @@ SectionID ElfReader::GetSectionByName(const char* name, int firstSection) const
 
 namespace Loader {
 
-AppLoader_ELF::AppLoader_ELF(FileSys::VirtualFile file) : AppLoader(std::move(file)) {}
+AppLoader_ELF::AppLoader_ELF(FileSys::VirtualFile file_) : AppLoader(std::move(file_)) {}
 
-FileType AppLoader_ELF::IdentifyType(const FileSys::VirtualFile& file) {
+FileType AppLoader_ELF::IdentifyType(const FileSys::VirtualFile& elf_file) {
     static constexpr u16 ELF_MACHINE_ARM{0x28};
 
     u32 magic = 0;
-    if (4 != file->ReadObject(&magic))
+    if (4 != elf_file->ReadObject(&magic)) {
         return FileType::Error;
+    }
 
     u16 machine = 0;
-    if (2 != file->ReadObject(&machine, 18))
+    if (2 != elf_file->ReadObject(&machine, 18)) {
         return FileType::Error;
+    }
 
-    if (Common::MakeMagic('\x7f', 'E', 'L', 'F') == magic && ELF_MACHINE_ARM == machine)
+    if (Common::MakeMagic('\x7f', 'E', 'L', 'F') == magic && ELF_MACHINE_ARM == machine) {
         return FileType::ELF;
+    }
 
     return FileType::Error;
 }

src/core/loader/elf.h

@@ -20,11 +20,13 @@ public:
     explicit AppLoader_ELF(FileSys::VirtualFile file);
 
     /**
-     * Returns the type of the file
+     * Identifies whether or not the given file is an ELF file.
-     * @param file open file
+     *
-     * @return FileType found, or FileType::Error if this loader doesn't know it
+     * @param elf_file The file to identify.
+     *
+     * @return FileType::ELF, or FileType::Error if the file is not an ELF file.
      */
-    static FileType IdentifyType(const FileSys::VirtualFile& file);
+    static FileType IdentifyType(const FileSys::VirtualFile& elf_file);
 
     FileType GetFileType() const override {
         return IdentifyType(file);

src/core/loader/kip.cpp

@@ -24,9 +24,9 @@ AppLoader_KIP::AppLoader_KIP(FileSys::VirtualFile file_)
 
 AppLoader_KIP::~AppLoader_KIP() = default;
 
-FileType AppLoader_KIP::IdentifyType(const FileSys::VirtualFile& file) {
+FileType AppLoader_KIP::IdentifyType(const FileSys::VirtualFile& in_file) {
     u32_le magic{};
-    if (file->GetSize() < sizeof(u32) || file->ReadObject(&magic) != sizeof(u32)) {
+    if (in_file->GetSize() < sizeof(u32) || in_file->ReadObject(&magic) != sizeof(u32)) {
         return FileType::Error;
     }
 
@@ -56,9 +56,9 @@ AppLoader::LoadResult AppLoader_KIP::Load(Kernel::Process& process,
         return {kip->GetStatus(), {}};
     }
 
-    const auto get_kip_address_space_type = [](const auto& kip) {
+    const auto get_kip_address_space_type = [](const auto& kip_type) {
-        return kip.Is64Bit()
+        return kip_type.Is64Bit()
-                   ? (kip.Is39BitAddressSpace() ? FileSys::ProgramAddressSpaceType::Is39Bit
+                   ? (kip_type.Is39BitAddressSpace() ? FileSys::ProgramAddressSpaceType::Is39Bit
                                                      : FileSys::ProgramAddressSpaceType::Is36Bit)
                    : FileSys::ProgramAddressSpaceType::Is32Bit;
     };

src/core/loader/kip.h

@@ -22,11 +22,13 @@ public:
     ~AppLoader_KIP() override;
 
     /**
-     * Returns the type of the file
+     * Identifies whether or not the given file is a KIP.
-     * @param file open file
+     *
-     * @return FileType found, or FileType::Error if this loader doesn't know it
+     * @param in_file The file to identify.
+     *
+     * @return FileType::KIP if found, or FileType::Error if unknown.
      */
-    static FileType IdentifyType(const FileSys::VirtualFile& file);
+    static FileType IdentifyType(const FileSys::VirtualFile& in_file);
 
     FileType GetFileType() const override;
 

src/core/loader/loader.h

@@ -152,21 +152,26 @@ public:
 
     /**
      * Returns the type of this file
+     *
      * @return FileType corresponding to the loaded file
      */
     virtual FileType GetFileType() const = 0;
 
     /**
      * Load the application and return the created Process instance
+     *
      * @param process The newly created process.
      * @param system  The system that this process is being loaded under.
+     *
      * @return The status result of the operation.
      */
     virtual LoadResult Load(Kernel::Process& process, Core::System& system) = 0;
 
     /**
      * Get the code (typically .code section) of the application
-     * @param buffer Reference to buffer to store data
+     *
+     * @param[out] buffer Reference to buffer to store data
+     *
      * @return ResultStatus result of function
      */
     virtual ResultStatus ReadCode(std::vector<u8>& buffer) {
@@ -175,7 +180,9 @@ public:
 
     /**
      * Get the icon (typically icon section) of the application
-     * @param buffer Reference to buffer to store data
+     *
+     * @param[out] buffer Reference to buffer to store data
+     *
      * @return ResultStatus result of function
      */
     virtual ResultStatus ReadIcon(std::vector<u8>& buffer) {
@@ -186,7 +193,9 @@ public:
      * Get the banner (typically banner section) of the application
      * In the context of NX, this is the animation that displays in the bottom right of the screen
      * when a game boots. Stored in GIF format.
-     * @param buffer Reference to buffer to store data
+     *
+     * @param[out] buffer Reference to buffer to store data
+     *
      * @return ResultStatus result of function
      */
     virtual ResultStatus ReadBanner(std::vector<u8>& buffer) {
@@ -197,7 +206,9 @@ public:
      * Get the logo (typically logo section) of the application
      * In the context of NX, this is the static image that displays in the top left of the screen
      * when a game boots. Stored in JPEG format.
-     * @param buffer Reference to buffer to store data
+     *
+     * @param[out] buffer Reference to buffer to store data
+     *
      * @return ResultStatus result of function
      */
     virtual ResultStatus ReadLogo(std::vector<u8>& buffer) {
@@ -206,7 +217,9 @@ public:
 
     /**
      * Get the program id of the application
-     * @param out_program_id Reference to store program id into
+     *
+     * @param[out] out_program_id Reference to store program id into
+     *
      * @return ResultStatus result of function
      */
     virtual ResultStatus ReadProgramId(u64& out_program_id) {
@@ -216,19 +229,23 @@ public:
     /**
      * Get the RomFS of the application
      * Since the RomFS can be huge, we return a file reference instead of copying to a buffer
-     * @param file The directory containing the RomFS
+     *
+     * @param[out] out_file The directory containing the RomFS
+     *
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadRomFS(FileSys::VirtualFile& file) {
+    virtual ResultStatus ReadRomFS(FileSys::VirtualFile& out_file) {
         return ResultStatus::ErrorNotImplemented;
     }
 
     /**
      * Get the raw update of the application, should it come packed with one
-     * @param file The raw update NCA file (Program-type
+     *
+     * @param[out] out_file The raw update NCA file (Program-type)
+     *
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadUpdateRaw(FileSys::VirtualFile& file) {
+    virtual ResultStatus ReadUpdateRaw(FileSys::VirtualFile& out_file) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -236,7 +253,8 @@ public:
      * Get whether or not updates can be applied to the RomFS.
      * By default, this is true, however for formats where it cannot be guaranteed that the RomFS is
      * the base game it should be set to false.
-     * @return bool whether or not updatable.
+     *
+     * @return bool indicating whether or not the RomFS is updatable.
      */
     virtual bool IsRomFSUpdatable() const {
         return true;
@@ -244,8 +262,9 @@ public:
 
     /**
      * Gets the difference between the start of the IVFC header and the start of level 6 (RomFS)
-     * data. Needed for bktr patching.
+     * data. Needed for BKTR patching.
-     * @return IVFC offset for romfs.
+     *
+     * @return IVFC offset for RomFS.
      */
     virtual u64 ReadRomFSIVFCOffset() const {
         return 0;
@@ -253,7 +272,9 @@ public:
 
     /**
      * Get the title of the application
-     * @param title Reference to store the application title into
+     *
+     * @param[out] title Reference to store the application title into
+     *
      * @return ResultStatus result of function
      */
     virtual ResultStatus ReadTitle(std::string& title) {
@@ -262,7 +283,9 @@ public:
 
     /**
      * Get the control data (CNMT) of the application
-     * @param control Reference to store the application control data into
+     *
+     * @param[out] control Reference to store the application control data into
+     *
      * @return ResultStatus result of function
      */
     virtual ResultStatus ReadControlData(FileSys::NACP& control) {
@@ -271,10 +294,12 @@ public:
 
     /**
      * Get the RomFS of the manual of the application
-     * @param file The raw manual RomFS of the game
+     *
+     * @param[out] out_file The raw manual RomFS of the game
+     *
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadManualRomFS(FileSys::VirtualFile& file) {
+    virtual ResultStatus ReadManualRomFS(FileSys::VirtualFile& out_file) {
         return ResultStatus::ErrorNotImplemented;
     }
 

src/core/loader/nax.cpp

@@ -26,14 +26,14 @@ FileType IdentifyTypeImpl(const FileSys::NAX& nax) {
 }
 } // Anonymous namespace
 
-AppLoader_NAX::AppLoader_NAX(FileSys::VirtualFile file)
+AppLoader_NAX::AppLoader_NAX(FileSys::VirtualFile file_)
-    : AppLoader(file), nax(std::make_unique<FileSys::NAX>(file)),
+    : AppLoader(file_), nax(std::make_unique<FileSys::NAX>(file_)),
       nca_loader(std::make_unique<AppLoader_NCA>(nax->GetDecrypted())) {}
 
 AppLoader_NAX::~AppLoader_NAX() = default;
 
-FileType AppLoader_NAX::IdentifyType(const FileSys::VirtualFile& file) {
+FileType AppLoader_NAX::IdentifyType(const FileSys::VirtualFile& nax_file) {
-    const FileSys::NAX nax(file);
+    const FileSys::NAX nax(nax_file);
     return IdentifyTypeImpl(nax);
 }
 
@@ -41,8 +41,7 @@ FileType AppLoader_NAX::GetFileType() const {
     return IdentifyTypeImpl(*nax);
 }
 
-AppLoader_NAX::LoadResult AppLoader_NAX::Load(Kernel::Process& process,
+AppLoader_NAX::LoadResult AppLoader_NAX::Load(Kernel::Process& process, Core::System& system) {
-                                              [[maybe_unused]] Core::System& system) {
     if (is_loaded) {
         return {ResultStatus::ErrorAlreadyLoaded, {}};
     }

src/core/loader/nax.h

@@ -23,15 +23,17 @@ class AppLoader_NCA;
 /// Loads a NAX file
 class AppLoader_NAX final : public AppLoader {
 public:
-    explicit AppLoader_NAX(FileSys::VirtualFile file);
+    explicit AppLoader_NAX(FileSys::VirtualFile file_);
     ~AppLoader_NAX() override;
 
     /**
-     * Returns the type of the file
+     * Identifies whether or not the given file is a NAX file.
-     * @param file open file
+     *
-     * @return FileType found, or FileType::Error if this loader doesn't know it
+     * @param nax_file The file to identify.
+     *
+     * @return FileType::NAX, or FileType::Error if the file is not a NAX file.
      */
-    static FileType IdentifyType(const FileSys::VirtualFile& file);
+    static FileType IdentifyType(const FileSys::VirtualFile& nax_file);
 
     FileType GetFileType() const override;
 

src/core/loader/nca.cpp

@@ -21,12 +21,13 @@ AppLoader_NCA::AppLoader_NCA(FileSys::VirtualFile file_)
 
 AppLoader_NCA::~AppLoader_NCA() = default;
 
-FileType AppLoader_NCA::IdentifyType(const FileSys::VirtualFile& file) {
+FileType AppLoader_NCA::IdentifyType(const FileSys::VirtualFile& nca_file) {
-    FileSys::NCA nca(file);
+    const FileSys::NCA nca(nca_file);
 
     if (nca.GetStatus() == ResultStatus::Success &&
-        nca.GetType() == FileSys::NCAContentType::Program)
+        nca.GetType() == FileSys::NCAContentType::Program) {
         return FileType::NCA;
+    }
 
     return FileType::Error;
 }
@@ -67,43 +68,59 @@ AppLoader_NCA::LoadResult AppLoader_NCA::Load(Kernel::Process& process, Core::Sy
 }
 
 ResultStatus AppLoader_NCA::ReadRomFS(FileSys::VirtualFile& dir) {
-    if (nca == nullptr)
+    if (nca == nullptr) {
         return ResultStatus::ErrorNotInitialized;
-    if (nca->GetRomFS() == nullptr || nca->GetRomFS()->GetSize() == 0)
+    }
+
+    if (nca->GetRomFS() == nullptr || nca->GetRomFS()->GetSize() == 0) {
         return ResultStatus::ErrorNoRomFS;
+    }
+
     dir = nca->GetRomFS();
     return ResultStatus::Success;
 }
 
 u64 AppLoader_NCA::ReadRomFSIVFCOffset() const {
-    if (nca == nullptr)
+    if (nca == nullptr) {
         return 0;
+    }
+
     return nca->GetBaseIVFCOffset();
 }
 
 ResultStatus AppLoader_NCA::ReadProgramId(u64& out_program_id) {
-    if (nca == nullptr || nca->GetStatus() != ResultStatus::Success)
+    if (nca == nullptr || nca->GetStatus() != ResultStatus::Success) {
         return ResultStatus::ErrorNotInitialized;
+    }
+
     out_program_id = nca->GetTitleId();
     return ResultStatus::Success;
 }
 
 ResultStatus AppLoader_NCA::ReadBanner(std::vector<u8>& buffer) {
-    if (nca == nullptr || nca->GetStatus() != ResultStatus::Success)
+    if (nca == nullptr || nca->GetStatus() != ResultStatus::Success) {
         return ResultStatus::ErrorNotInitialized;
+    }
+
     const auto logo = nca->GetLogoPartition();
-    if (logo == nullptr)
+    if (logo == nullptr) {
         return ResultStatus::ErrorNoIcon;
+    }
+
     buffer = logo->GetFile("StartupMovie.gif")->ReadAllBytes();
     return ResultStatus::Success;
 }
 
 ResultStatus AppLoader_NCA::ReadLogo(std::vector<u8>& buffer) {
-    if (nca == nullptr || nca->GetStatus() != ResultStatus::Success)
+    if (nca == nullptr || nca->GetStatus() != ResultStatus::Success) {
         return ResultStatus::ErrorNotInitialized;
+    }
+
     const auto logo = nca->GetLogoPartition();
-    if (logo == nullptr)
+    if (logo == nullptr) {
         return ResultStatus::ErrorNoIcon;
+    }
+
     buffer = logo->GetFile("NintendoLogo.png")->ReadAllBytes();
     return ResultStatus::Success;
 }

src/core/loader/nca.h

@@ -23,15 +23,17 @@ class AppLoader_DeconstructedRomDirectory;
 /// Loads an NCA file
 class AppLoader_NCA final : public AppLoader {
 public:
-    explicit AppLoader_NCA(FileSys::VirtualFile file);
+    explicit AppLoader_NCA(FileSys::VirtualFile file_);
     ~AppLoader_NCA() override;
 
     /**
-     * Returns the type of the file
+     * Identifies whether or not the given file is an NCA file.
-     * @param file open file
+     *
-     * @return FileType found, or FileType::Error if this loader doesn't know it
+     * @param nca_file The file to identify.
+     *
+     * @return FileType::NCA, or FileType::Error if the file is not an NCA file.
      */
-    static FileType IdentifyType(const FileSys::VirtualFile& file);
+    static FileType IdentifyType(const FileSys::VirtualFile& nca_file);
 
     FileType GetFileType() const override {
         return IdentifyType(file);

src/core/loader/nro.cpp

@@ -72,7 +72,7 @@ struct AssetHeader {
 };
 static_assert(sizeof(AssetHeader) == 0x38, "AssetHeader has incorrect size.");
 
-AppLoader_NRO::AppLoader_NRO(FileSys::VirtualFile file) : AppLoader(file) {
+AppLoader_NRO::AppLoader_NRO(FileSys::VirtualFile file_) : AppLoader(std::move(file_)) {
     NroHeader nro_header{};
     if (file->ReadObject(&nro_header) != sizeof(NroHeader)) {
         return;
@@ -114,10 +114,10 @@ AppLoader_NRO::AppLoader_NRO(FileSys::VirtualFile file) : AppLoader(file) {
 
 AppLoader_NRO::~AppLoader_NRO() = default;
 
-FileType AppLoader_NRO::IdentifyType(const FileSys::VirtualFile& file) {
+FileType AppLoader_NRO::IdentifyType(const FileSys::VirtualFile& nro_file) {
     // Read NSO header
     NroHeader nro_header{};
-    if (sizeof(NroHeader) != file->ReadObject(&nro_header)) {
+    if (sizeof(NroHeader) != nro_file->ReadObject(&nro_header)) {
         return FileType::Error;
     }
     if (nro_header.magic == Common::MakeMagic('N', 'R', 'O', '0')) {
@@ -130,8 +130,7 @@ static constexpr u32 PageAlignSize(u32 size) {
     return static_cast<u32>((size + Core::Memory::PAGE_MASK) & ~Core::Memory::PAGE_MASK);
 }
 
-static bool LoadNroImpl(Kernel::Process& process, const std::vector<u8>& data,
+static bool LoadNroImpl(Kernel::Process& process, const std::vector<u8>& data) {
-                        const std::string& name) {
     if (data.size() < sizeof(NroHeader)) {
         return {};
     }
@@ -200,8 +199,8 @@ static bool LoadNroImpl(Kernel::Process& process, const std::vector<u8>& data,
     return true;
 }
 
-bool AppLoader_NRO::LoadNro(Kernel::Process& process, const FileSys::VfsFile& file) {
+bool AppLoader_NRO::LoadNro(Kernel::Process& process, const FileSys::VfsFile& nro_file) {
-    return LoadNroImpl(process, file.ReadAllBytes(), file.GetName());
+    return LoadNroImpl(process, nro_file.ReadAllBytes());
 }
 
 AppLoader_NRO::LoadResult AppLoader_NRO::Load(Kernel::Process& process, Core::System& system) {

src/core/loader/nro.h

@@ -27,15 +27,17 @@ namespace Loader {
 /// Loads an NRO file
 class AppLoader_NRO final : public AppLoader {
 public:
-    explicit AppLoader_NRO(FileSys::VirtualFile file);
+    explicit AppLoader_NRO(FileSys::VirtualFile file_);
     ~AppLoader_NRO() override;
 
     /**
-     * Returns the type of the file
+     * Identifies whether or not the given file is an NRO file.
-     * @param file open file
+     *
-     * @return FileType found, or FileType::Error if this loader doesn't know it
+     * @param nro_file The file to identify.
+     *
+     * @return FileType::NRO, or FileType::Error if the file is not an NRO file.
      */
-    static FileType IdentifyType(const FileSys::VirtualFile& file);
+    static FileType IdentifyType(const FileSys::VirtualFile& nro_file);
 
     FileType GetFileType() const override {
         return IdentifyType(file);
@@ -51,7 +53,7 @@ public:
     bool IsRomFSUpdatable() const override;
 
 private:
-    bool LoadNro(Kernel::Process& process, const FileSys::VfsFile& file);
+    bool LoadNro(Kernel::Process& process, const FileSys::VfsFile& nro_file);
 
     std::vector<u8> icon_data;
     std::unique_ptr<FileSys::NACP> nacp;

src/core/loader/nso.cpp

@@ -56,11 +56,11 @@ bool NSOHeader::IsSegmentCompressed(size_t segment_num) const {
     return ((flags >> segment_num) & 1) != 0;
 }
 
-AppLoader_NSO::AppLoader_NSO(FileSys::VirtualFile file) : AppLoader(std::move(file)) {}
+AppLoader_NSO::AppLoader_NSO(FileSys::VirtualFile file_) : AppLoader(std::move(file_)) {}
 
-FileType AppLoader_NSO::IdentifyType(const FileSys::VirtualFile& file) {
+FileType AppLoader_NSO::IdentifyType(const FileSys::VirtualFile& in_file) {
     u32 magic = 0;
-    if (file->ReadObject(&magic) != sizeof(magic)) {
+    if (in_file->ReadObject(&magic) != sizeof(magic)) {
         return FileType::Error;
     }
 
@@ -72,15 +72,15 @@ FileType AppLoader_NSO::IdentifyType(const FileSys::VirtualFile& file) {
 }
 
 std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process, Core::System& system,
-                                               const FileSys::VfsFile& file, VAddr load_base,
+                                               const FileSys::VfsFile& nso_file, VAddr load_base,
                                                bool should_pass_arguments, bool load_into_process,
                                                std::optional<FileSys::PatchManager> pm) {
-    if (file.GetSize() < sizeof(NSOHeader)) {
+    if (nso_file.GetSize() < sizeof(NSOHeader)) {
         return std::nullopt;
     }
 
     NSOHeader nso_header{};
-    if (sizeof(NSOHeader) != file.ReadObject(&nso_header)) {
+    if (sizeof(NSOHeader) != nso_file.ReadObject(&nso_header)) {
         return std::nullopt;
     }
 
@@ -92,8 +92,8 @@ std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process, Core::S
     Kernel::CodeSet codeset;
     Kernel::PhysicalMemory program_image;
     for (std::size_t i = 0; i < nso_header.segments.size(); ++i) {
-        std::vector<u8> data =
+        std::vector<u8> data = nso_file.ReadBytes(nso_header.segments_compressed_size[i],
-            file.ReadBytes(nso_header.segments_compressed_size[i], nso_header.segments[i].offset);
+                                                  nso_header.segments[i].offset);
         if (nso_header.IsSegmentCompressed(i)) {
             data = DecompressSegment(data, nso_header.segments[i]);
         }
@@ -136,7 +136,7 @@ std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process, Core::S
         pi_header.insert(pi_header.begin() + sizeof(NSOHeader), program_image.data(),
                          program_image.data() + program_image.size());
 
-        pi_header = pm->PatchNSO(pi_header, file.GetName());
+        pi_header = pm->PatchNSO(pi_header, nso_file.GetName());
 
         std::copy(pi_header.begin() + sizeof(NSOHeader), pi_header.end(), program_image.data());
     }
@@ -183,8 +183,8 @@ AppLoader_NSO::LoadResult AppLoader_NSO::Load(Kernel::Process& process, Core::Sy
                                                   Core::Memory::DEFAULT_STACK_SIZE}};
 }
 
-ResultStatus AppLoader_NSO::ReadNSOModules(Modules& modules) {
+ResultStatus AppLoader_NSO::ReadNSOModules(Modules& out_modules) {
-    modules = this->modules;
+    out_modules = this->modules;
     return ResultStatus::Success;
 }
 

src/core/loader/nso.h

@@ -71,27 +71,29 @@ static_assert(sizeof(NSOArgumentHeader) == 0x20, "NSOArgumentHeader has incorrec
 /// Loads an NSO file
 class AppLoader_NSO final : public AppLoader {
 public:
-    explicit AppLoader_NSO(FileSys::VirtualFile file);
+    explicit AppLoader_NSO(FileSys::VirtualFile file_);
 
     /**
-     * Returns the type of the file
+     * Identifies whether or not the given file is a form of NSO file.
-     * @param file open file
+     *
-     * @return FileType found, or FileType::Error if this loader doesn't know it
+     * @param in_file The file to be identified.
+     *
+     * @return FileType::NSO if found, or FileType::Error if some other type of file.
      */
-    static FileType IdentifyType(const FileSys::VirtualFile& file);
+    static FileType IdentifyType(const FileSys::VirtualFile& in_file);
 
     FileType GetFileType() const override {
         return IdentifyType(file);
     }
 
     static std::optional<VAddr> LoadModule(Kernel::Process& process, Core::System& system,
-                                           const FileSys::VfsFile& file, VAddr load_base,
+                                           const FileSys::VfsFile& nso_file, VAddr load_base,
                                            bool should_pass_arguments, bool load_into_process,
                                            std::optional<FileSys::PatchManager> pm = {});
 
     LoadResult Load(Kernel::Process& process, Core::System& system) override;
 
-    ResultStatus ReadNSOModules(Modules& modules) override;
+    ResultStatus ReadNSOModules(Modules& out_modules) override;
 
 private:
     Modules modules;

src/core/loader/nsp.cpp

@@ -21,11 +21,11 @@
 
 namespace Loader {
 
-AppLoader_NSP::AppLoader_NSP(FileSys::VirtualFile file,
+AppLoader_NSP::AppLoader_NSP(FileSys::VirtualFile file_,
                              const Service::FileSystem::FileSystemController& fsc,
                              const FileSys::ContentProvider& content_provider,
                              std::size_t program_index)
-    : AppLoader(file), nsp(std::make_unique<FileSys::NSP>(file, program_index)),
+    : AppLoader(file_), nsp(std::make_unique<FileSys::NSP>(file_, program_index)),
       title_id(nsp->GetProgramTitleID()) {
 
     if (nsp->GetStatus() != ResultStatus::Success) {
@@ -57,8 +57,8 @@ AppLoader_NSP::AppLoader_NSP(FileSys::VirtualFile file,
 
 AppLoader_NSP::~AppLoader_NSP() = default;
 
-FileType AppLoader_NSP::IdentifyType(const FileSys::VirtualFile& file) {
+FileType AppLoader_NSP::IdentifyType(const FileSys::VirtualFile& nsp_file) {
-    FileSys::NSP nsp(file);
+    const FileSys::NSP nsp(nsp_file);
 
     if (nsp.GetStatus() == ResultStatus::Success) {
         // Extracted Type case
@@ -121,67 +121,80 @@ AppLoader_NSP::LoadResult AppLoader_NSP::Load(Kernel::Process& process, Core::Sy
     return result;
 }
 
-ResultStatus AppLoader_NSP::ReadRomFS(FileSys::VirtualFile& file) {
+ResultStatus AppLoader_NSP::ReadRomFS(FileSys::VirtualFile& out_file) {
-    return secondary_loader->ReadRomFS(file);
+    return secondary_loader->ReadRomFS(out_file);
 }
 
 u64 AppLoader_NSP::ReadRomFSIVFCOffset() const {
     return secondary_loader->ReadRomFSIVFCOffset();
 }
 
-ResultStatus AppLoader_NSP::ReadUpdateRaw(FileSys::VirtualFile& file) {
+ResultStatus AppLoader_NSP::ReadUpdateRaw(FileSys::VirtualFile& out_file) {
-    if (nsp->IsExtractedType())
+    if (nsp->IsExtractedType()) {
         return ResultStatus::ErrorNoPackedUpdate;
+    }
 
     const auto read =
         nsp->GetNCAFile(FileSys::GetUpdateTitleID(title_id), FileSys::ContentRecordType::Program);
 
-    if (read == nullptr)
+    if (read == nullptr) {
         return ResultStatus::ErrorNoPackedUpdate;
+    }
+
     const auto nca_test = std::make_shared<FileSys::NCA>(read);
-
+    if (nca_test->GetStatus() != ResultStatus::ErrorMissingBKTRBaseRomFS) {
-    if (nca_test->GetStatus() != ResultStatus::ErrorMissingBKTRBaseRomFS)
         return nca_test->GetStatus();
+    }
 
-    file = read;
+    out_file = read;
     return ResultStatus::Success;
 }
 
 ResultStatus AppLoader_NSP::ReadProgramId(u64& out_program_id) {
-    if (title_id == 0)
+    if (title_id == 0) {
         return ResultStatus::ErrorNotInitialized;
+    }
+
     out_program_id = title_id;
     return ResultStatus::Success;
 }
 
 ResultStatus AppLoader_NSP::ReadIcon(std::vector<u8>& buffer) {
-    if (icon_file == nullptr)
+    if (icon_file == nullptr) {
         return ResultStatus::ErrorNoControl;
+    }
+
     buffer = icon_file->ReadAllBytes();
     return ResultStatus::Success;
 }
 
 ResultStatus AppLoader_NSP::ReadTitle(std::string& title) {
-    if (nacp_file == nullptr)
+    if (nacp_file == nullptr) {
         return ResultStatus::ErrorNoControl;
+    }
+
     title = nacp_file->GetApplicationName();
     return ResultStatus::Success;
 }
 
 ResultStatus AppLoader_NSP::ReadControlData(FileSys::NACP& nacp) {
-    if (nacp_file == nullptr)
+    if (nacp_file == nullptr) {
         return ResultStatus::ErrorNoControl;
+    }
+
     nacp = *nacp_file;
     return ResultStatus::Success;
 }
 
-ResultStatus AppLoader_NSP::ReadManualRomFS(FileSys::VirtualFile& file) {
+ResultStatus AppLoader_NSP::ReadManualRomFS(FileSys::VirtualFile& out_file) {
     const auto nca =
         nsp->GetNCA(nsp->GetProgramTitleID(), FileSys::ContentRecordType::HtmlDocument);
-    if (nsp->GetStatus() != ResultStatus::Success || nca == nullptr)
+    if (nsp->GetStatus() != ResultStatus::Success || nca == nullptr) {
         return ResultStatus::ErrorNoRomFS;
-    file = nca->GetRomFS();
+    }
-    return file == nullptr ? ResultStatus::ErrorNoRomFS : ResultStatus::Success;
+
+    out_file = nca->GetRomFS();
+    return out_file == nullptr ? ResultStatus::ErrorNoRomFS : ResultStatus::Success;
 }
 
 ResultStatus AppLoader_NSP::ReadBanner(std::vector<u8>& buffer) {

src/core/loader/nsp.h

@@ -26,18 +26,20 @@ class AppLoader_NCA;
 /// Loads an XCI file
 class AppLoader_NSP final : public AppLoader {
 public:
-    explicit AppLoader_NSP(FileSys::VirtualFile file,
+    explicit AppLoader_NSP(FileSys::VirtualFile file_,
                            const Service::FileSystem::FileSystemController& fsc,
                            const FileSys::ContentProvider& content_provider,
                            std::size_t program_index);
     ~AppLoader_NSP() override;
 
     /**
-     * Returns the type of the file
+     * Identifies whether or not the given file is an NSP file.
-     * @param file open file
+     *
-     * @return FileType found, or FileType::Error if this loader doesn't know it
+     * @param nsp_file The file to identify.
+     *
+     * @return FileType::NSP, or FileType::Error if the file is not an NSP.
      */
-    static FileType IdentifyType(const FileSys::VirtualFile& file);
+    static FileType IdentifyType(const FileSys::VirtualFile& nsp_file);
 
     FileType GetFileType() const override {
         return IdentifyType(file);
@@ -45,14 +47,14 @@ public:
 
     LoadResult Load(Kernel::Process& process, Core::System& system) override;
 
-    ResultStatus ReadRomFS(FileSys::VirtualFile& file) override;
+    ResultStatus ReadRomFS(FileSys::VirtualFile& out_file) override;
     u64 ReadRomFSIVFCOffset() const override;
-    ResultStatus ReadUpdateRaw(FileSys::VirtualFile& file) override;
+    ResultStatus ReadUpdateRaw(FileSys::VirtualFile& out_file) override;
     ResultStatus ReadProgramId(u64& out_program_id) override;
     ResultStatus ReadIcon(std::vector<u8>& buffer) override;
     ResultStatus ReadTitle(std::string& title) override;
     ResultStatus ReadControlData(FileSys::NACP& nacp) override;
-    ResultStatus ReadManualRomFS(FileSys::VirtualFile& file) override;
+    ResultStatus ReadManualRomFS(FileSys::VirtualFile& out_file) override;
 
     ResultStatus ReadBanner(std::vector<u8>& buffer) override;
     ResultStatus ReadLogo(std::vector<u8>& buffer) override;

src/core/loader/xci.cpp

@@ -20,11 +20,11 @@
 
 namespace Loader {
 
-AppLoader_XCI::AppLoader_XCI(FileSys::VirtualFile file,
+AppLoader_XCI::AppLoader_XCI(FileSys::VirtualFile file_,
                              const Service::FileSystem::FileSystemController& fsc,
                              const FileSys::ContentProvider& content_provider,
                              std::size_t program_index)
-    : AppLoader(file), xci(std::make_unique<FileSys::XCI>(file, program_index)),
+    : AppLoader(file_), xci(std::make_unique<FileSys::XCI>(file_, program_index)),
       nca_loader(std::make_unique<AppLoader_NCA>(xci->GetProgramNCAFile())) {
     if (xci->GetStatus() != ResultStatus::Success) {
         return;
@@ -43,8 +43,8 @@ AppLoader_XCI::AppLoader_XCI(FileSys::VirtualFile file,
 
 AppLoader_XCI::~AppLoader_XCI() = default;
 
-FileType AppLoader_XCI::IdentifyType(const FileSys::VirtualFile& file) {
+FileType AppLoader_XCI::IdentifyType(const FileSys::VirtualFile& xci_file) {
-    FileSys::XCI xci(file);
+    const FileSys::XCI xci(xci_file);
 
     if (xci.GetStatus() == ResultStatus::Success &&
         xci.GetNCAByType(FileSys::NCAContentType::Program) != nullptr &&
@@ -87,31 +87,33 @@ AppLoader_XCI::LoadResult AppLoader_XCI::Load(Kernel::Process& process, Core::Sy
     return result;
 }
 
-ResultStatus AppLoader_XCI::ReadRomFS(FileSys::VirtualFile& file) {
+ResultStatus AppLoader_XCI::ReadRomFS(FileSys::VirtualFile& out_file) {
-    return nca_loader->ReadRomFS(file);
+    return nca_loader->ReadRomFS(out_file);
 }
 
 u64 AppLoader_XCI::ReadRomFSIVFCOffset() const {
     return nca_loader->ReadRomFSIVFCOffset();
 }
 
-ResultStatus AppLoader_XCI::ReadUpdateRaw(FileSys::VirtualFile& file) {
+ResultStatus AppLoader_XCI::ReadUpdateRaw(FileSys::VirtualFile& out_file) {
     u64 program_id{};
     nca_loader->ReadProgramId(program_id);
-    if (program_id == 0)
+    if (program_id == 0) {
         return ResultStatus::ErrorXCIMissingProgramNCA;
+    }
 
     const auto read = xci->GetSecurePartitionNSP()->GetNCAFile(
         FileSys::GetUpdateTitleID(program_id), FileSys::ContentRecordType::Program);
-
+    if (read == nullptr) {
-    if (read == nullptr)
         return ResultStatus::ErrorNoPackedUpdate;
+    }
+
     const auto nca_test = std::make_shared<FileSys::NCA>(read);
-
+    if (nca_test->GetStatus() != ResultStatus::ErrorMissingBKTRBaseRomFS) {
-    if (nca_test->GetStatus() != ResultStatus::ErrorMissingBKTRBaseRomFS)
         return nca_test->GetStatus();
+    }
 
-    file = read;
+    out_file = read;
     return ResultStatus::Success;
 }
 
@@ -120,33 +122,41 @@ ResultStatus AppLoader_XCI::ReadProgramId(u64& out_program_id) {
 }
 
 ResultStatus AppLoader_XCI::ReadIcon(std::vector<u8>& buffer) {
-    if (icon_file == nullptr)
+    if (icon_file == nullptr) {
         return ResultStatus::ErrorNoControl;
+    }
+
     buffer = icon_file->ReadAllBytes();
     return ResultStatus::Success;
 }
 
 ResultStatus AppLoader_XCI::ReadTitle(std::string& title) {
-    if (nacp_file == nullptr)
+    if (nacp_file == nullptr) {
         return ResultStatus::ErrorNoControl;
+    }
+
     title = nacp_file->GetApplicationName();
     return ResultStatus::Success;
 }
 
 ResultStatus AppLoader_XCI::ReadControlData(FileSys::NACP& control) {
-    if (nacp_file == nullptr)
+    if (nacp_file == nullptr) {
         return ResultStatus::ErrorNoControl;
+    }
+
     control = *nacp_file;
     return ResultStatus::Success;
 }
 
-ResultStatus AppLoader_XCI::ReadManualRomFS(FileSys::VirtualFile& file) {
+ResultStatus AppLoader_XCI::ReadManualRomFS(FileSys::VirtualFile& out_file) {
     const auto nca = xci->GetSecurePartitionNSP()->GetNCA(xci->GetProgramTitleID(),
                                                           FileSys::ContentRecordType::HtmlDocument);
-    if (xci->GetStatus() != ResultStatus::Success || nca == nullptr)
+    if (xci->GetStatus() != ResultStatus::Success || nca == nullptr) {
         return ResultStatus::ErrorXCIMissingPartition;
-    file = nca->GetRomFS();
+    }
-    return file == nullptr ? ResultStatus::ErrorNoRomFS : ResultStatus::Success;
+
+    out_file = nca->GetRomFS();
+    return out_file == nullptr ? ResultStatus::ErrorNoRomFS : ResultStatus::Success;
 }
 
 ResultStatus AppLoader_XCI::ReadBanner(std::vector<u8>& buffer) {

src/core/loader/xci.h

@@ -26,18 +26,20 @@ class AppLoader_NCA;
 /// Loads an XCI file
 class AppLoader_XCI final : public AppLoader {
 public:
-    explicit AppLoader_XCI(FileSys::VirtualFile file,
+    explicit AppLoader_XCI(FileSys::VirtualFile file_,
                            const Service::FileSystem::FileSystemController& fsc,
                            const FileSys::ContentProvider& content_provider,
                            std::size_t program_index);
     ~AppLoader_XCI() override;
 
     /**
-     * Returns the type of the file
+     * Identifies whether or not the given file is an XCI file.
-     * @param file open file
+     *
-     * @return FileType found, or FileType::Error if this loader doesn't know it
+     * @param xci_file The file to identify.
+     *
+     * @return FileType::XCI, or FileType::Error if the file is not an XCI file.
      */
-    static FileType IdentifyType(const FileSys::VirtualFile& file);
+    static FileType IdentifyType(const FileSys::VirtualFile& xci_file);
 
     FileType GetFileType() const override {
         return IdentifyType(file);
@@ -45,14 +47,14 @@ public:
 
     LoadResult Load(Kernel::Process& process, Core::System& system) override;
 
-    ResultStatus ReadRomFS(FileSys::VirtualFile& file) override;
+    ResultStatus ReadRomFS(FileSys::VirtualFile& out_file) override;
     u64 ReadRomFSIVFCOffset() const override;
-    ResultStatus ReadUpdateRaw(FileSys::VirtualFile& file) override;
+    ResultStatus ReadUpdateRaw(FileSys::VirtualFile& out_file) override;
     ResultStatus ReadProgramId(u64& out_program_id) override;
     ResultStatus ReadIcon(std::vector<u8>& buffer) override;
     ResultStatus ReadTitle(std::string& title) override;
     ResultStatus ReadControlData(FileSys::NACP& control) override;
-    ResultStatus ReadManualRomFS(FileSys::VirtualFile& file) override;
+    ResultStatus ReadManualRomFS(FileSys::VirtualFile& out_file) override;
 
     ResultStatus ReadBanner(std::vector<u8>& buffer) override;
     ResultStatus ReadLogo(std::vector<u8>& buffer) override;