From c1aea152542dbfbf868b6531d7eddb211d6aa0c8 Mon Sep 17 00:00:00 2001
From: Deukhoofd <Deukhoofd@gmail.com>
Date: Fri, 11 Feb 2022 14:06:52 +0100
Subject: [PATCH] Better type punning

---
 add_on/scriptmath/scriptmath.cpp | 30 ++++++++++++++++++++++++------
 1 file changed, 24 insertions(+), 6 deletions(-)

diff --git a/add_on/scriptmath/scriptmath.cpp b/add_on/scriptmath/scriptmath.cpp
index c5b86c3..6d9a62c 100644
--- a/add_on/scriptmath/scriptmath.cpp
+++ b/add_on/scriptmath/scriptmath.cpp
@@ -72,27 +72,45 @@ double fraction(double v)
 }
 #endif
 
+template<typename T, typename F>
+struct alias_cast_t
+{
+    union
+    {
+        F raw;
+        T data;
+    };
+};
+
 // As AngelScript doesn't allow bitwise manipulation of float types we'll provide a couple of
 // functions for converting float values to IEEE 754 formatted values etc. This also allow us to 
 // provide a platform agnostic representation to the script so the scripts don't have to worry
 // about whether the CPU uses IEEE 754 floats or some other representation
 float fpFromIEEE(asUINT raw)
 {
-	// TODO: Identify CPU family to provide proper conversion
-	//        if the CPU doesn't natively use IEEE style floats
-	return *reinterpret_cast<float*>(&raw);
+    // TODO: Identify CPU family to provide proper conversion
+    //        if the CPU doesn't natively use IEEE style floats
+    alias_cast_t<asUINT, float> t;
+    t.raw = raw;
+    return t.data;
 }
 asUINT fpToIEEE(float fp)
 {
-	return *reinterpret_cast<asUINT*>(&fp);
+    alias_cast_t<float, asUINT> t;
+    t.raw = fp;
+    return t.data;
 }
 double fpFromIEEE(asQWORD raw)
 {
-	return *reinterpret_cast<double*>(&raw);
+    alias_cast_t<asQWORD, double> t;
+    t.raw = raw;
+    return t.data;
 }
 asQWORD fpToIEEE(double fp)
 {
-	return *reinterpret_cast<asQWORD*>(&fp);
+    alias_cast_t<double, asQWORD> t;
+    t.raw = fp;
+    return t.data;
 }
 
 // closeTo() is used to determine if the binary representation of two numbers are