[ox] Replace __attribute__((packed)) with OX_PACKED

deps/ox/src/ox/std/byteswap.hpp

@@ -9,6 +9,7 @@
 #pragma once
 
 #include "defines.hpp"
+#include "stddef.hpp"
 #include "types.hpp"
 #include "typetraits.hpp"
 
@@ -58,7 +59,7 @@ template<typename T, bool byteSwap>
 }
 
 template<typename T, bool byteSwap>
-class __attribute__((packed)) ByteSwapInteger {
+class OX_PACKED ByteSwapInteger {
 	private:
 		T m_value;
 

deps/ox/src/ox/std/random.hpp

@@ -8,13 +8,14 @@
 
 #pragma once
 
+#include "stddef.hpp"
 #include "types.hpp"
 
 namespace ox {
 
 using RandomSeed = uint64_t[2];
 
-class __attribute__((packed)) Random {
+class OX_PACKED Random {
 	private:
 		RandomSeed m_seed;
 

deps/ox/src/ox/std/stddef.hpp

@@ -13,3 +13,9 @@
 #else
 #define offsetof(type, member) __builtin_offsetof(type, member)
 #endif
+
+#ifdef _MSC_VER
+#define OX_PACKED
+#else
+#define OX_PACKED __attribute__((packed))
+#endif