nax: Add AppLoader_NAX and update loader to support it

src/core/loader/nax.h

@@ -0,0 +1,43 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include "common/common_types.h"
+#include "core/file_sys/card_image.h"
+#include "core/file_sys/xts_archive.h"
+#include "core/loader/loader.h"
+#include "core/loader/nca.h"
+
+namespace Loader {
+
+/// Loads a NAX file
+class AppLoader_NAX final : public AppLoader {
+public:
+    explicit AppLoader_NAX(FileSys::VirtualFile file);
+    ~AppLoader_NAX();
+
+    /**
+     * Returns the type of the file
+     * @param file std::shared_ptr<VfsFile> open file
+     * @return FileType found, or FileType::Error if this loader doesn't know it
+     */
+    static FileType IdentifyType(const FileSys::VirtualFile& file);
+
+    FileType GetFileType() override {
+        return IdentifyType(file);
+    }
+
+    ResultStatus Load(Kernel::SharedPtr<Kernel::Process>& process) override;
+
+    ResultStatus ReadRomFS(FileSys::VirtualFile& dir) override;
+    ResultStatus ReadProgramId(u64& out_program_id) override;
+
+private:
+    std::unique_ptr<FileSys::NAX> nax;
+    std::unique_ptr<AppLoader_NCA> nca_loader;
+};
+
+} // namespace Loader