Add filesystem header

inc/kernel/filesystem/filesystem.h

@@ -0,0 +1,33 @@
+#pragma once
+#include <lainlib/mutex/ticketlock.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+/************************
+ *** Team Kitty, 2021 ***
+ ***     Chroma       ***
+ ***********************/
+
+/**
+ * @brief Abstract base class for filesystem implementations.
+ * ! Do not instantiate!
+ */
+
+class FileSystem {
+public:
+    virtual void Init(size_t Sector, size_t Size) = 0;
+    virtual const char* GetName() = 0;
+
+    /*********** File Manipulation***********/
+    virtual size_t GetFileSize(const char* FilePath) = 0;
+    virtual bool FileExists(const char* FilePath) = 0;
+
+    virtual uint8_t* Read(const char* FilePath) = 0;
+    virtual size_t ReadIntoBuffer(const char* FilePath, size_t Offset, size_t Length, uint8_t* Target) = 0;
+
+    virtual size_t Write(const char* FilePath, uint8_t* Data) = 0;
+    virtual size_t WriteFromBuffer(const char* FilePath, size_t Offset, size_t Length, uint8_t* Buffer) = 0;
+
+private:
+    ticketlock_t Lock;
+};