Merge branch 'master' of gitlab.2:f1x1t/myxlib

src/myx/math/almost_equal_relative.cpp

@@ -0,0 +1,42 @@
+#include <myx/math/almost_equal_relative.hpp>
+
+#include <cmath>
+
+namespace myx {
+
+namespace math {
+
+bool almost_equal_relative( const float a, const float b,
+                            const float maxRelDiff )
+{
+	float diff    = fabsf( a - b );
+	float aN      = fabsf( a );
+	float bN      = fabsf( b );
+	float largest = ( bN > aN ) ? bN : aN;
+
+	if ( diff <= largest * maxRelDiff )
+	{
+		return( true );
+	}
+	return( false );
+}
+
+
+bool almost_equal_relative( const double a, const double b,
+                            const double maxRelDiff )
+{
+	double diff    = fabs( a - b );
+	double aN      = fabs( a );
+	double bN      = fabs( b );
+	double largest = ( bN > aN ) ? bN : aN;
+
+	if ( diff <= largest * maxRelDiff )
+	{
+		return( true );
+	}
+	return( false );
+}
+
+} // namespace math
+
+} // namespace myx