fsp_srv: Remove unnecessary vector construction in IFile's Write() function

We can avoid constructing a std::vector here by simply passing a pointer
to the original data and the size of the copy we wish to perform to the
backend's Write() function instead, avoiding copying the data where it's
otherwise not needed.

src/core/file_sys/vfs.cpp

@@ -116,14 +116,14 @@ bool VfsDirectory::IsRoot() const {
 
 size_t VfsDirectory::GetSize() const {
     const auto& files = GetFiles();
-    const auto sum_sizes = [](const auto& range) {
-        return std::accumulate(range.begin(), range.end(), 0ULL,
-                               [](const auto& f1, const auto& f2) { return f1 + f2->GetSize(); });
-    };
+    const auto file_total =
+        std::accumulate(files.begin(), files.end(), 0ull,
+                        [](const auto& f1, const auto& f2) { return f1 + f2->GetSize(); });
 
-    const auto file_total = sum_sizes(files);
     const auto& sub_dir = GetSubdirectories();
-    const auto subdir_total = sum_sizes(sub_dir);
+    const auto subdir_total =
+        std::accumulate(sub_dir.begin(), sub_dir.end(), 0ull,
+                        [](const auto& f1, const auto& f2) { return f1 + f2->GetSize(); });
 
     return file_total + subdir_total;
 }

src/core/hle/service/acc/acc.h

@@ -12,7 +12,7 @@ class Module final {
 public:
     class Interface : public ServiceFramework<Interface> {
     public:
-        explicit Interface(std::shared_ptr<Module> module, const char* name);
+        Interface(std::shared_ptr<Module> module, const char* name);
 
         void GetUserExistence(Kernel::HLERequestContext& ctx);
         void ListAllUsers(Kernel::HLERequestContext& ctx);

src/core/hle/service/am/am.h

@@ -72,7 +72,7 @@ public:
 
 class ISelfController final : public ServiceFramework<ISelfController> {
 public:
-    explicit ISelfController(std::shared_ptr<NVFlinger::NVFlinger> nvflinger);
+    ISelfController(std::shared_ptr<NVFlinger::NVFlinger> nvflinger);
 
 private:
     void SetFocusHandlingMode(Kernel::HLERequestContext& ctx);

src/core/hle/service/am/applet_ae.cpp

@@ -12,7 +12,7 @@ namespace Service::AM {
 
 class ILibraryAppletProxy final : public ServiceFramework<ILibraryAppletProxy> {
 public:
-    explicit ILibraryAppletProxy(std::shared_ptr<NVFlinger::NVFlinger> nvflinger)
+    ILibraryAppletProxy(std::shared_ptr<NVFlinger::NVFlinger> nvflinger)
         : ServiceFramework("ILibraryAppletProxy"), nvflinger(std::move(nvflinger)) {
         static const FunctionInfo functions[] = {
             {0, &ILibraryAppletProxy::GetCommonStateGetter, "GetCommonStateGetter"},

src/core/hle/service/am/applet_ae.h

@@ -17,7 +17,7 @@ namespace AM {
 
 class AppletAE final : public ServiceFramework<AppletAE> {
 public:
-    explicit AppletAE(std::shared_ptr<NVFlinger::NVFlinger> nvflinger);
+    AppletAE(std::shared_ptr<NVFlinger::NVFlinger> nvflinger);
     ~AppletAE() = default;
 
 private:

src/core/hle/service/am/applet_oe.cpp

@@ -12,7 +12,7 @@ namespace Service::AM {
 
 class IApplicationProxy final : public ServiceFramework<IApplicationProxy> {
 public:
-    explicit IApplicationProxy(std::shared_ptr<NVFlinger::NVFlinger> nvflinger)
+    IApplicationProxy(std::shared_ptr<NVFlinger::NVFlinger> nvflinger)
         : ServiceFramework("IApplicationProxy"), nvflinger(std::move(nvflinger)) {
         static const FunctionInfo functions[] = {
             {0, &IApplicationProxy::GetCommonStateGetter, "GetCommonStateGetter"},

src/core/hle/service/am/applet_oe.h

@@ -17,7 +17,7 @@ namespace AM {
 
 class AppletOE final : public ServiceFramework<AppletOE> {
 public:
-    explicit AppletOE(std::shared_ptr<NVFlinger::NVFlinger> nvflinger);
+    AppletOE(std::shared_ptr<NVFlinger::NVFlinger> nvflinger);
     ~AppletOE() = default;
 
 private:

src/core/hle/service/apm/interface.h

@@ -10,7 +10,7 @@ namespace Service::APM {
 
 class APM final : public ServiceFramework<APM> {
 public:
-    explicit APM(std::shared_ptr<Module> apm, const char* name);
+    APM(std::shared_ptr<Module> apm, const char* name);
     ~APM() = default;
 
 private:

src/core/hle/service/audio/audren_u.cpp

@@ -17,7 +17,7 @@ constexpr u64 audio_ticks{static_cast<u64>(CoreTiming::BASE_CLOCK_RATE / 200)};
 
 class IAudioRenderer final : public ServiceFramework<IAudioRenderer> {
 public:
-    explicit IAudioRenderer(AudioRendererParameter audren_params)
+    IAudioRenderer(AudioRendererParameter audren_params)
         : ServiceFramework("IAudioRenderer"), worker_params(audren_params) {
         static const FunctionInfo functions[] = {
             {0, nullptr, "GetAudioRendererSampleRate"},
@@ -176,7 +176,7 @@ private:
     struct UpdateDataHeader {
         UpdateDataHeader() {}
 
-        explicit UpdateDataHeader(const AudioRendererParameter& config) {
+        UpdateDataHeader(const AudioRendererParameter& config) {
             revision = Common::MakeMagic('R', 'E', 'V', '4'); // 5.1.0 Revision
             behavior_size = 0xb0;
             memory_pools_size = (config.effect_count + (config.voice_count * 4)) * 0x10;

src/core/hle/service/bcat/module.h

@@ -12,7 +12,7 @@ class Module final {
 public:
     class Interface : public ServiceFramework<Interface> {
     public:
-        explicit Interface(std::shared_ptr<Module> module, const char* name);
+        Interface(std::shared_ptr<Module> module, const char* name);
 
         void CreateBcatService(Kernel::HLERequestContext& ctx);
 

src/core/hle/service/fatal/fatal.h

@@ -12,7 +12,7 @@ class Module final {
 public:
     class Interface : public ServiceFramework<Interface> {
     public:
-        explicit Interface(std::shared_ptr<Module> module, const char* name);
+        Interface(std::shared_ptr<Module> module, const char* name);
 
         void ThrowFatalWithPolicy(Kernel::HLERequestContext& ctx);
         void ThrowFatalWithCpuContext(Kernel::HLERequestContext& ctx);

src/core/hle/service/filesystem/fsp_srv.cpp

@@ -3,6 +3,14 @@
 // Refer to the license.txt file included.
 
 #include <cinttypes>
+#include <cstring>
+#include <iterator>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "common/assert.h"
+#include "common/common_types.h"
 #include "common/logging/log.h"
 #include "common/string_util.h"
 #include "core/core.h"
@@ -26,7 +34,7 @@ enum class StorageId : u8 {
 
 class IStorage final : public ServiceFramework<IStorage> {
 public:
-    IStorage(FileSys::VirtualFile backend_)
+    explicit IStorage(FileSys::VirtualFile backend_)
         : ServiceFramework("IStorage"), backend(std::move(backend_)) {
         static const FunctionInfo functions[] = {
             {0, &IStorage::Read, "Read"}, {1, nullptr, "Write"},   {2, nullptr, "Flush"},
@@ -133,19 +141,19 @@ private:
             return;
         }
 
-        std::vector<u8> data = ctx.ReadBuffer();
-        std::vector<u8> actual_data(length);
+        const std::vector<u8> data = ctx.ReadBuffer();
 
         ASSERT_MSG(
-            data.size() <= length,
+            static_cast<s64>(data.size()) <= length,
             "Attempting to write more data than requested (requested={:016X}, actual={:016X}).",
             length, data.size());
 
-        std::copy(data.begin(), data.end(), actual_data.begin());
         // Write the data to the Storage backend
-        auto written = backend->WriteBytes(data, offset);
+        const auto write_size =
+            static_cast<std::size_t>(std::distance(data.begin(), data.begin() + length));
+        const std::size_t written = backend->Write(data.data(), write_size, offset);
 
-        ASSERT_MSG(written == length,
+        ASSERT_MSG(static_cast<s64>(written) == length,
                    "Could not write all bytes to file (requested={:016X}, actual={:016X}).", length,
                    written);
 
@@ -223,23 +231,20 @@ private:
         LOG_DEBUG(Service_FS, "called, unk=0x{:X}", unk);
 
         // Calculate how many entries we can fit in the output buffer
-        u64 count_entries = ctx.GetWriteBufferSize() / sizeof(FileSys::Entry);
+        const u64 count_entries = ctx.GetWriteBufferSize() / sizeof(FileSys::Entry);
 
         // Cap at total number of entries.
-        u64 actual_entries = std::min(count_entries, entries.size() - next_entry_index);
+        const u64 actual_entries = std::min(count_entries, entries.size() - next_entry_index);
 
-        // Read the data from the Directory backend
-        std::vector<FileSys::Entry> entry_data(entries.begin() + next_entry_index,
-                                               entries.begin() + next_entry_index + actual_entries);
+        // Determine data start and end
+        const auto* begin = reinterpret_cast<u8*>(entries.data() + next_entry_index);
+        const auto* end = reinterpret_cast<u8*>(entries.data() + next_entry_index + actual_entries);
+        const auto range_size = static_cast<std::size_t>(std::distance(begin, end));
 
         next_entry_index += actual_entries;
 
-        // Convert the data into a byte array
-        std::vector<u8> output(entry_data.size() * sizeof(FileSys::Entry));
-        std::memcpy(output.data(), entry_data.data(), output.size());
-
         // Write the data to memory
-        ctx.WriteBuffer(output);
+        ctx.WriteBuffer(begin, range_size);
 
         IPC::ResponseBuilder rb{ctx, 4};
         rb.Push(RESULT_SUCCESS);

src/core/hle/service/friend/friend.h

@@ -12,7 +12,7 @@ class Module final {
 public:
     class Interface : public ServiceFramework<Interface> {
     public:
-        explicit Interface(std::shared_ptr<Module> module, const char* name);
+        Interface(std::shared_ptr<Module> module, const char* name);
 
         void CreateFriendService(Kernel::HLERequestContext& ctx);
 

src/core/hle/service/nfp/nfp.h

@@ -12,7 +12,7 @@ class Module final {
 public:
     class Interface : public ServiceFramework<Interface> {
     public:
-        explicit Interface(std::shared_ptr<Module> module, const char* name);
+        Interface(std::shared_ptr<Module> module, const char* name);
 
         void CreateUserInterface(Kernel::HLERequestContext& ctx);
 

src/core/hle/service/nifm/nifm.h

@@ -12,7 +12,7 @@ class Module final {
 public:
     class Interface : public ServiceFramework<Interface> {
     public:
-        explicit Interface(std::shared_ptr<Module> module, const char* name);
+        Interface(std::shared_ptr<Module> module, const char* name);
 
         void CreateGeneralServiceOld(Kernel::HLERequestContext& ctx);
         void CreateGeneralService(Kernel::HLERequestContext& ctx);

src/core/hle/service/nvdrv/devices/nvdisp_disp0.h

@@ -17,7 +17,7 @@ class nvmap;
 
 class nvdisp_disp0 final : public nvdevice {
 public:
-    explicit nvdisp_disp0(std::shared_ptr<nvmap> nvmap_dev) : nvmap_dev(std::move(nvmap_dev)) {}
+    nvdisp_disp0(std::shared_ptr<nvmap> nvmap_dev) : nvdevice(), nvmap_dev(std::move(nvmap_dev)) {}
     ~nvdisp_disp0() = default;
 
     u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) override;

src/core/hle/service/nvdrv/devices/nvhost_as_gpu.h

@@ -18,7 +18,7 @@ class nvmap;
 
 class nvhost_as_gpu final : public nvdevice {
 public:
-    explicit nvhost_as_gpu(std::shared_ptr<nvmap> nvmap_dev) : nvmap_dev(std::move(nvmap_dev)) {}
+    nvhost_as_gpu(std::shared_ptr<nvmap> nvmap_dev) : nvmap_dev(std::move(nvmap_dev)) {}
     ~nvhost_as_gpu() override = default;
 
     u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) override;

src/core/hle/service/nvdrv/devices/nvhost_gpu.h

@@ -18,7 +18,7 @@ constexpr u32 NVGPU_IOCTL_CHANNEL_SUBMIT_GPFIFO(0x8);
 
 class nvhost_gpu final : public nvdevice {
 public:
-    explicit nvhost_gpu(std::shared_ptr<nvmap> nvmap_dev) : nvmap_dev(std::move(nvmap_dev)) {}
+    nvhost_gpu(std::shared_ptr<nvmap> nvmap_dev) : nvmap_dev(std::move(nvmap_dev)) {}
     ~nvhost_gpu() override = default;
 
     u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) override;

src/core/hle/service/pctl/module.h

@@ -12,7 +12,7 @@ class Module final {
 public:
     class Interface : public ServiceFramework<Interface> {
     public:
-        explicit Interface(std::shared_ptr<Module> module, const char* name);
+        Interface(std::shared_ptr<Module> module, const char* name);
 
         void CreateService(Kernel::HLERequestContext& ctx);
         void CreateServiceWithoutInitialize(Kernel::HLERequestContext& ctx);

src/core/hle/service/sm/sm.h

@@ -22,7 +22,7 @@ namespace Service::SM {
 /// Interface to "sm:" service
 class SM final : public ServiceFramework<SM> {
 public:
-    explicit SM(std::shared_ptr<ServiceManager> service_manager);
+    SM(std::shared_ptr<ServiceManager> service_manager);
     ~SM() override;
 
 private:

src/core/hle/service/spl/module.h

@@ -12,7 +12,7 @@ class Module final {
 public:
     class Interface : public ServiceFramework<Interface> {
     public:
-        explicit Interface(std::shared_ptr<Module> module, const char* name);
+        Interface(std::shared_ptr<Module> module, const char* name);
 
         void GetRandomBytes(Kernel::HLERequestContext& ctx);
 

src/core/hle/service/time/time.h

@@ -57,7 +57,7 @@ class Module final {
 public:
     class Interface : public ServiceFramework<Interface> {
     public:
-        explicit Interface(std::shared_ptr<Module> time, const char* name);
+        Interface(std::shared_ptr<Module> time, const char* name);
 
         void GetStandardUserSystemClock(Kernel::HLERequestContext& ctx);
         void GetStandardNetworkSystemClock(Kernel::HLERequestContext& ctx);

src/core/hle/service/vi/vi.cpp

@@ -579,7 +579,7 @@ private:
 
 class ISystemDisplayService final : public ServiceFramework<ISystemDisplayService> {
 public:
-    explicit ISystemDisplayService() : ServiceFramework("ISystemDisplayService") {
+    ISystemDisplayService() : ServiceFramework("ISystemDisplayService") {
         static const FunctionInfo functions[] = {
             {1200, nullptr, "GetZOrderCountMin"},
             {1202, nullptr, "GetZOrderCountMax"},
@@ -777,7 +777,7 @@ private:
 
 class IApplicationDisplayService final : public ServiceFramework<IApplicationDisplayService> {
 public:
-    explicit IApplicationDisplayService(std::shared_ptr<NVFlinger::NVFlinger> nv_flinger);
+    IApplicationDisplayService(std::shared_ptr<NVFlinger::NVFlinger> nv_flinger);
     ~IApplicationDisplayService() = default;
 
 private:

src/core/hle/service/vi/vi.h

@@ -24,8 +24,8 @@ class Module final {
 public:
     class Interface : public ServiceFramework<Interface> {
     public:
-        explicit Interface(std::shared_ptr<Module> module, const char* name,
-                           std::shared_ptr<NVFlinger::NVFlinger> nv_flinger);
+        Interface(std::shared_ptr<Module> module, const char* name,
+                  std::shared_ptr<NVFlinger::NVFlinger> nv_flinger);
 
         void GetDisplayService(Kernel::HLERequestContext& ctx);
 

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -795,9 +795,7 @@ void RasterizerOpenGL::SyncClipCoef() {
 void RasterizerOpenGL::SyncCullMode() {
     const auto& regs = Core::System::GetInstance().GPU().Maxwell3D().regs;
 
-    // TODO(bunnei): Enable the below once more things work - until then, this may hide regressions
-    // state.cull.enabled = regs.cull.enabled != 0;
-    state.cull.enabled = false;
+    state.cull.enabled = regs.cull.enabled != 0;
 
     if (state.cull.enabled) {
         state.cull.front_face = MaxwellToGL::FrontFace(regs.cull.front_face);