match some Z2Calc functions (#72)

* Z2Calc OK

* inline definitions in random.h and format

* set -enum int compiler flag and fix enum hacks

* note for get_ufloat_1 inline

* PR suggestions and UB note

Co-authored-by: Pheenoh <pheenoh@gmail.com>

include/Z2AudioLib/Z2Calc/Z2Calc.h

@@ -1,8 +1,10 @@
+#include "JSystem/JMath/random.h"
 #include "global.h"
 
 namespace Z2Calc {
-struct CurveSign {
-    // temp
+enum CurveSign {
+    CURVE_SIGN_0 = 0,
+    CURVE_SIGN_1 = 1,
 };
 
 struct FNoise1f {
@@ -20,4 +22,4 @@ float linearTransform(float, float, float, float, float, bool);
 float getParamByExp(float, float, float, float, float, float, Z2Calc::CurveSign);
 float getRandom(float, float, float);
 float getRandom_0_1(void);
-}  // namespace Z2Calc
+}  // namespace Z2Calc