ksys/res: Implement OffsetReadFileDevice

src/KingSystem/Resource/resOffsetReadFileDevice.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#include <filedevice/seadMainFileDevice.h>
+#include "KingSystem/Utils/Types.h"
+
+namespace ksys::res {
+
+class OffsetRead {
+public:
+    OffsetRead() { resetOffsetRead(); }
+    virtual ~OffsetRead() = default;
+
+    void setReadOffset(u32 offset) { mOffsetReadOffset = offset; }
+    void setFileDevice(sead::FileDevice* device) { mOffsetReadFileDevice = device; }
+
+    void resetOffsetRead() {
+        mOffsetReadOffset = 0;
+        mOffsetReadFileDevice = nullptr;
+    }
+
+protected:
+    u32 mOffsetReadOffset;
+    sead::FileDevice* mOffsetReadFileDevice;
+};
+KSYS_CHECK_SIZE_NX150(OffsetRead, 0x18);
+
+class OffsetReadFileDevice : public sead::MainFileDevice, public OffsetRead {
+    SEAD_RTTI_OVERRIDE(OffsetReadFileDevice, sead::MainFileDevice)
+public:
+    explicit OffsetReadFileDevice(sead::Heap* heap);
+    ~OffsetReadFileDevice() override = default;
+
+    void setReadOffset(u32 offset) { OffsetRead::setReadOffset(offset); }
+    void setFileDevice(sead::FileDevice* device);
+
+protected:
+    u8* doLoad_(LoadArg& arg) override;
+};
+KSYS_CHECK_SIZE_NX150(OffsetReadFileDevice, 0xa0);
+
+}  // namespace ksys::res