Stub GPU DMA, fix up some FS stuff. horribly wrong savedata implementation

include/fs/archive_base.hpp

@@ -9,7 +9,7 @@ namespace PathType {
         Empty = 1,
         Binary = 2,
         ASCII = 3,
-        UTF8 = 4,
+        UTF16 = 4,
     };
 }
 
@@ -68,7 +68,6 @@ struct ArchiveSession {
 
 class ArchiveBase {
 protected:
-    using Result = u32;
     using Handle = u32;
     Memory& mem;
 

include/fs/archive_ncch.hpp

@@ -12,4 +12,10 @@ public:
 	bool openFile(const FSPath& path) override;
 	ArchiveBase* openArchive(const FSPath& path) override;
 	std::optional<u32> readFile(FileSession* file, u64 offset, u32 size, u32 dataPointer) override;
+
+	// Returns whether the cart has a RomFS
+	bool hasRomFS() {
+		auto cxi = mem.getCXI();
+		return (cxi != nullptr && cxi->hasRomFS());
+	}
 };

include/fs/archive_save_data.hpp

@@ -12,4 +12,10 @@ public:
 	bool openFile(const FSPath& path) override;
 	ArchiveBase* openArchive(const FSPath& path) override;
 	std::optional<u32> readFile(FileSession* file, u64 offset, u32 size, u32 dataPointer) override;
+
+	// Returns whether the cart has save data or not
+	bool cartHasSaveData() {
+		auto cxi = mem.getCXI();
+		return (cxi != nullptr && cxi->hasSaveData()); // We need to have a CXI file with more than 0 bytes of save data
+	}
 };