pmomusic/upnp/devices/services/statevariables/utils_numeric_operandes.go

package statevariables

import "fmt"

// valuesToNumericOperands takes two interface{} values, casts them to a numeric type based on a given StateVarType, and returns their float64 equivalents.
// If any error occurs during casting or conversion to float64, it is returned along with zero values for the operands.
func valuesToNumericOperands(t StateVarType, a interface{}, b interface{}) (float64, float64, error) {
	var err error
	if !t.IsNumeric() {
		return 0, 0, fmt.Errorf("type %v is not numeric", t)
	}

	a, err = t.Cast(a)
	if err != nil {
		return 0, 0, err
	}

	b, err = t.Cast(b)
	if err != nil {
		return 0, 0, err
	}

	af, err := toFloat(a, 64)
	if err != nil {
		return 0, 0, err
	}
	bf, err := toFloat(b, 64)
	if err != nil {
		return 0, 0, err
	}
	return af, bf, nil
}