Refactored platform code to use interfaces for patch code with a special feature and improved patch code file names

arm9/source/patches/platform/IReadSectorsDmaPatchCode.h

@@ -0,0 +1,26 @@
+#pragma once
+
+/// @brief Abstract base class for patch code implementing dma sector reads
+class IReadSectorsDmaPatchCode
+{
+protected:
+    IReadSectorsDmaPatchCode() { }
+
+public:
+    /// @brief Pointer to a function for reading a single SD sector using the given dmaChannel.
+    ///        In first sector of batch read, previousSrcSector will be 0.
+    ///        On further reads previousSrcSector will contains the previous srcSector
+    ///        which can be used to continue a sequential read.
+    typedef void (*ReadSectorsDmaFunc)(u32 srcSector, u32 previousSrcSector, u32 dmaChannel, void* dst);
+
+    /// @brief Pointer to a function for finishing a batch of dma reads.
+    typedef void (*ReadSectorsDmaFinishFunc)(void);
+
+    /// @brief Gets a pointer to the dma SD read function in the patch code.
+    /// @return The pointer to the dma SD read function.
+    virtual const ReadSectorsDmaFunc GetSdReadDmaFunction() const = 0;
+
+    /// @brief Gets a pointer to the dma SD read finish function in the patch code.
+    /// @return The pointer to the dma SD read finish function.
+    virtual const ReadSectorsDmaFinishFunc GetSdReadDmaFinishFunction() const = 0;
+};