1 files changed, 46 insertions, 0 deletions
diff --git a/NorthstarDLL/bits.cpp b/NorthstarDLL/bits.cpp
new file mode 100644
index 00000000..014899f2
--- /dev/null
+++ b/NorthstarDLL/bits.cpp
@@ -0,0 +1,46 @@
+//=============================================================================//
+//
+// Purpose: look for NANs, infinities, and underflows.
+//
+//=============================================================================//
+
+#include "pch.h"
+#include "bits.h"
+
+//-----------------------------------------------------------------------------
+// This follows the ANSI/IEEE 754-1985 standard
+//-----------------------------------------------------------------------------
+unsigned long& FloatBits(float& f)
+{
+	return *reinterpret_cast<unsigned long*>(&f);
+}
+
+unsigned long const& FloatBits(float const& f)
+{
+	return *reinterpret_cast<unsigned long const*>(&f);
+}
+
+float BitsToFloat(unsigned long i)
+{
+	return *reinterpret_cast<float*>(&i);
+}
+
+bool IsFinite(float f)
+{
+	return ((FloatBits(f) & 0x7F800000) != 0x7F800000);
+}
+
+unsigned long FloatAbsBits(float f)
+{
+	return FloatBits(f) & 0x7FFFFFFF;
+}
+
+float FloatMakePositive(float f)
+{
+	return fabsf(f);
+}
+
+float FloatNegate(float f)
+{
+	return -f; // BitsToFloat( FloatBits(f) ^ 0x80000000 );
+}