BAN: Add wrappers for little/big endian numbers

BAN/include/BAN/Endianness.h

@@ -0,0 +1,45 @@
+#pragma once
+
+#include <BAN/Traits.h>
+
+#include <stddef.h>
+
+namespace BAN
+{
+
+	template<integral T>
+	struct LittleEndian
+	{
+		constexpr operator T() const
+		{
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+			return raw;
+#else
+			T result { 0 };
+			for (size_t i = 0; i < sizeof(T); i++)
+				result = (result << 8) | ((raw >> (sizeof(T) - i - 1) * 8) & 0xFF);
+			return result;
+#endif
+		}
+		T raw;
+	};
+
+	template<integral T>
+	struct BigEndian
+	{
+		constexpr operator T() const
+		{
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+			return raw;
+#else
+			T result { 0 };
+			for (size_t i = 0; i < sizeof(T); i++)
+				result = (result << 8) | ((raw >> (i * 8)) & 0xFF);
+			return result;
+#endif
+		}
+	private:
+		T raw;
+	};
+
+}