Address #17 (only)

Author: halotroop2288

XenonUtils/byteswap.h

@@ -2,17 +2,27 @@
 
 #include <cassert>
 
+#ifdef __clang__
+#define _byte_swap16(value) __builtin_bswap16(static_cast<uint16_t>(value))
+#define _byte_swap32(value) __builtin_bswap32(static_cast<uint32_t>(value))
+#define _byte_swap64(value) __builtin_bswap64(static_cast<uint64_t>(value))
+#elif defined(MSC_VER)
+#define _byte_swap16(value) _byteswap_ushort(static_cast<uint16_t>(value))
+#define _byte_swap32(value) _byteswap_ulong(static_cast<uint32_t>(value))
+#define _byte_swap64(value) _byteswap_uint64(static_cast<uint64_t>(value))
+#endif
+
 template<typename T>
 inline T ByteSwap(T value)
 {
     if constexpr (sizeof(T) == 1)
         return value;
-    else if constexpr (sizeof(T) == 2)
-        return static_cast<T>(__builtin_bswap16(static_cast<uint16_t>(value)));
-    else if constexpr (sizeof(T) == 4)
-        return static_cast<T>(__builtin_bswap32(static_cast<uint32_t>(value)));
-    else if constexpr (sizeof(T) == 8)
-        return static_cast<T>(__builtin_bswap64(static_cast<uint64_t>(value)));
+    if constexpr (sizeof(T) == 2)
+        return static_cast<T>(_byte_swap16(value));
+    if constexpr (sizeof(T) == 4)
+        return static_cast<T>(_byte_swap32(value));
+    if constexpr (sizeof(T) == 8)
+        return static_cast<T>(_byte_swap64(value));
 
     assert(false && "Unexpected byte size.");
     return value;