Started implementing Galois class

XMath/Galois.h

@@ -1,29 +1,73 @@
 #pragma once
 
+#if defined(__MINGW32__) || defined(_WIN32)
+
+#if defined(GALOIS_API)
+#define GALOIS_API __declspec(dllexport)
+#else
+#define GALOIS_API __declspec(dllimport)
+#endif
+
+#endif
+
+#ifndef GALOIS_API
+  #if __GNUC__ >= 4
+    #define GALOIS_API __attribute__ ((visibility ("default")))
+  #else
+    #define GALOIS_API
+  #endif
+#endif
+
+
 namespace CryptoCPP {
 	namespace Math {
 		class Galois
 		{
 		public:
-			Galois(size_t characteristic, size_t exponent, size_t irreducible);
+			GALOIS_API Galois(
+					size_t characteristic,
+					size_t exponent,
+					size_t * irreducible,
+					size_t irreducible_size,
+					size_t * value
+					);
+			GALOIS_API ~Galois();
 
-			Galois * add(const Galois * value) const; // Add
-			Galois * sub(const Galois * value) const; // Subtract
-			Galois * mul(const Galois * value) const; // Multiply
-			Galois * inv(const Galois * value) const; // Inverse multiply
+			// Addition
+			GALOIS_API Galois * add(const Galois * value) const;
+
+			// Subtraction
+			GALOIS_API Galois * sub(const Galois * value) const;
+
+			// Multiplication
+			GALOIS_API Galois * mul(const Galois * value) const;
+
+			// Inverse multiplication
+			GALOIS_API Galois * inv(const Galois * value) const;
 
 
 		protected:
-			size_t characteristic, exponent, irreducible;
+			static const size_t high_bit = 1 << ((sizeof(size_t)*8)-1);
+			// GF parameters
+			const size_t characteristic, exponent, irreducible;
+			// Effective storage params
+			const size_t binary_block_size, data_size;
+			// Value of this GF object
+			const size_t * data;
 
-			// Reduce the value of this galois to one that fits the field parameters
-			void reduce();
+
+			// Reduce the value of this galois to fit characteristic
+			GALOIS_API void reduce();
 
 			// Self-mutable operations
-			void iadd(const Galois * value);
-			void isub(const Galois * value);
-			void imul(const Galois * value);
-			void iinv(const Galois * value);
+			GALOIS_API void iadd(const Galois * value);
+			GALOIS_API void isub(const Galois * value);
+			GALOIS_API void imul(const Galois * value);
+			GALOIS_API void iinv(const Galois * value);
+
+			GALOIS_API size_t _mask(size_t bits, bool side) const;
+			GALOIS_API size_t get_value(size_t idx) const;
+			GALOIS_API void set_value(size_t idx, size_t value);
 		};
 	}
-}
+}