Added ES6 Math properties and methods

builtin_math.go

@@ -2,6 +2,7 @@ package goja
 
 import (
 	"math"
+	"math/bits"
 )
 
 func (r *Runtime) math_abs(call FunctionCall) Value {
@@ -12,14 +13,26 @@ func (r *Runtime) math_acos(call FunctionCall) Value {
 	return floatToValue(math.Acos(call.Argument(0).ToFloat()))
 }
 
+func (r *Runtime) math_acosh(call FunctionCall) Value {
+	return floatToValue(math.Acosh(call.Argument(0).ToFloat()))
+}
+
 func (r *Runtime) math_asin(call FunctionCall) Value {
 	return floatToValue(math.Asin(call.Argument(0).ToFloat()))
 }
 
+func (r *Runtime) math_asinh(call FunctionCall) Value {
+	return floatToValue(math.Asinh(call.Argument(0).ToFloat()))
+}
+
 func (r *Runtime) math_atan(call FunctionCall) Value {
 	return floatToValue(math.Atan(call.Argument(0).ToFloat()))
 }
 
+func (r *Runtime) math_atanh(call FunctionCall) Value {
+	return floatToValue(math.Atanh(call.Argument(0).ToFloat()))
+}
+
 func (r *Runtime) math_atan2(call FunctionCall) Value {
 	y := call.Argument(0).ToFloat()
 	x := call.Argument(1).ToFloat()
@@ -27,26 +40,103 @@ func (r *Runtime) math_atan2(call FunctionCall) Value {
 	return floatToValue(math.Atan2(y, x))
 }
 
+func (r *Runtime) math_cbrt(call FunctionCall) Value {
+	return floatToValue(math.Cbrt(call.Argument(0).ToFloat()))
+}
+
 func (r *Runtime) math_ceil(call FunctionCall) Value {
 	return floatToValue(math.Ceil(call.Argument(0).ToFloat()))
 }
 
+func (r *Runtime) math_clz32(call FunctionCall) Value {
+	return intToValue(int64(bits.LeadingZeros32(toUint32(call.Argument(0)))))
+}
+
 func (r *Runtime) math_cos(call FunctionCall) Value {
 	return floatToValue(math.Cos(call.Argument(0).ToFloat()))
 }
 
+func (r *Runtime) math_cosh(call FunctionCall) Value {
+	return floatToValue(math.Cosh(call.Argument(0).ToFloat()))
+}
+
 func (r *Runtime) math_exp(call FunctionCall) Value {
 	return floatToValue(math.Exp(call.Argument(0).ToFloat()))
 }
 
+func (r *Runtime) math_expm1(call FunctionCall) Value {
+	return floatToValue(math.Expm1(call.Argument(0).ToFloat()))
+}
+
 func (r *Runtime) math_floor(call FunctionCall) Value {
 	return floatToValue(math.Floor(call.Argument(0).ToFloat()))
 }
 
+func (r *Runtime) math_fround(call FunctionCall) Value {
+	return floatToValue(float64(float32(call.Argument(0).ToFloat())))
+}
+
+func (r *Runtime) math_hypot(call FunctionCall) Value {
+	var max float64
+	var hasNaN bool
+	absValues := make([]float64, 0, len(call.Arguments))
+	for _, v := range call.Arguments {
+		arg := nilSafe(v).ToFloat()
+		if math.IsNaN(arg) {
+			hasNaN = true
+		} else {
+			abs := math.Abs(arg)
+			if abs > max {
+				max = abs
+			}
+			absValues = append(absValues, abs)
+		}
+	}
+	if math.IsInf(max, 1) {
+		return _positiveInf
+	}
+	if hasNaN {
+		return _NaN
+	}
+	if max == 0 {
+		return _positiveZero
+	}
+
+	// Kahan summation to avoid rounding errors.
+	// Normalize the numbers to the largest one to avoid overflow.
+	var sum, compensation float64
+	for _, n := range absValues {
+		n /= max
+		summand := n*n - compensation
+		preliminary := sum + summand
+		compensation = (preliminary - sum) - summand
+		sum = preliminary
+	}
+	return floatToValue(math.Sqrt(sum) * max)
+}
+
+func (r *Runtime) math_imul(call FunctionCall) Value {
+	x := toUint32(call.Argument(0))
+	y := toUint32(call.Argument(1))
+	return intToValue(int64(int32(x * y)))
+}
+
 func (r *Runtime) math_log(call FunctionCall) Value {
 	return floatToValue(math.Log(call.Argument(0).ToFloat()))
 }
 
+func (r *Runtime) math_log1p(call FunctionCall) Value {
+	return floatToValue(math.Log1p(call.Argument(0).ToFloat()))
+}
+
+func (r *Runtime) math_log10(call FunctionCall) Value {
+	return floatToValue(math.Log10(call.Argument(0).ToFloat()))
+}
+
+func (r *Runtime) math_log2(call FunctionCall) Value {
+	return floatToValue(math.Log2(call.Argument(0).ToFloat()))
+}
+
 func (r *Runtime) math_max(call FunctionCall) Value {
 	if len(call.Arguments) == 0 {
 		return _negativeInf
@@ -135,10 +225,26 @@ func (r *Runtime) math_round(call FunctionCall) Value {
 	return floatToValue(t)
 }
 
+func (r *Runtime) math_sign(call FunctionCall) Value {
+	arg := call.Argument(0)
+	num := arg.ToFloat()
+	if math.IsNaN(num) || num == 0 { // this will match -0 too
+		return arg
+	}
+	if num > 0 {
+		return intToValue(1)
+	}
+	return intToValue(-1)
+}
+
 func (r *Runtime) math_sin(call FunctionCall) Value {
 	return floatToValue(math.Sin(call.Argument(0).ToFloat()))
 }
 
+func (r *Runtime) math_sinh(call FunctionCall) Value {
+	return floatToValue(math.Sinh(call.Argument(0).ToFloat()))
+}
+
 func (r *Runtime) math_sqrt(call FunctionCall) Value {
 	return floatToValue(math.Sqrt(call.Argument(0).ToFloat()))
 }
@@ -147,9 +253,21 @@ func (r *Runtime) math_tan(call FunctionCall) Value {
 	return floatToValue(math.Tan(call.Argument(0).ToFloat()))
 }
 
+func (r *Runtime) math_tanh(call FunctionCall) Value {
+	return floatToValue(math.Tanh(call.Argument(0).ToFloat()))
+}
+
+func (r *Runtime) math_trunc(call FunctionCall) Value {
+	arg := call.Argument(0)
+	if i, ok := arg.(valueInt); ok {
+		return i
+	}
+	return floatToValue(math.Trunc(arg.ToFloat()))
+}
+
 func (r *Runtime) createMath(val *Object) objectImpl {
 	m := &baseObject{
-		class:      "Math",
+		class:      classMath,
 		val:        val,
 		extensible: true,
 		prototype:  r.global.ObjectPrototype,
@@ -159,30 +277,48 @@ func (r *Runtime) createMath(val *Object) objectImpl {
 	m._putProp("E", valueFloat(math.E), false, false, false)
 	m._putProp("LN10", valueFloat(math.Ln10), false, false, false)
 	m._putProp("LN2", valueFloat(math.Ln2), false, false, false)
-	m._putProp("LOG2E", valueFloat(math.Log2E), false, false, false)
 	m._putProp("LOG10E", valueFloat(math.Log10E), false, false, false)
+	m._putProp("LOG2E", valueFloat(math.Log2E), false, false, false)
 	m._putProp("PI", valueFloat(math.Pi), false, false, false)
 	m._putProp("SQRT1_2", valueFloat(sqrt1_2), false, false, false)
 	m._putProp("SQRT2", valueFloat(math.Sqrt2), false, false, false)
+	m._putSym(symToStringTag, valueProp(asciiString(classMath), false, false, true))
 
 	m._putProp("abs", r.newNativeFunc(r.math_abs, nil, "abs", nil, 1), true, false, true)
 	m._putProp("acos", r.newNativeFunc(r.math_acos, nil, "acos", nil, 1), true, false, true)
+	m._putProp("acosh", r.newNativeFunc(r.math_acosh, nil, "acosh", nil, 1), true, false, true)
 	m._putProp("asin", r.newNativeFunc(r.math_asin, nil, "asin", nil, 1), true, false, true)
+	m._putProp("asinh", r.newNativeFunc(r.math_asinh, nil, "asinh", nil, 1), true, false, true)
 	m._putProp("atan", r.newNativeFunc(r.math_atan, nil, "atan", nil, 1), true, false, true)
+	m._putProp("atanh", r.newNativeFunc(r.math_atanh, nil, "atanh", nil, 1), true, false, true)
 	m._putProp("atan2", r.newNativeFunc(r.math_atan2, nil, "atan2", nil, 2), true, false, true)
+	m._putProp("cbrt", r.newNativeFunc(r.math_cbrt, nil, "cbrt", nil, 1), true, false, true)
 	m._putProp("ceil", r.newNativeFunc(r.math_ceil, nil, "ceil", nil, 1), true, false, true)
+	m._putProp("clz32", r.newNativeFunc(r.math_clz32, nil, "clz32", nil, 1), true, false, true)
 	m._putProp("cos", r.newNativeFunc(r.math_cos, nil, "cos", nil, 1), true, false, true)
+	m._putProp("cosh", r.newNativeFunc(r.math_cosh, nil, "cosh", nil, 1), true, false, true)
 	m._putProp("exp", r.newNativeFunc(r.math_exp, nil, "exp", nil, 1), true, false, true)
+	m._putProp("expm1", r.newNativeFunc(r.math_expm1, nil, "expm1", nil, 1), true, false, true)
 	m._putProp("floor", r.newNativeFunc(r.math_floor, nil, "floor", nil, 1), true, false, true)
+	m._putProp("fround", r.newNativeFunc(r.math_fround, nil, "fround", nil, 1), true, false, true)
+	m._putProp("hypot", r.newNativeFunc(r.math_hypot, nil, "hypot", nil, 2), true, false, true)
+	m._putProp("imul", r.newNativeFunc(r.math_imul, nil, "imul", nil, 2), true, false, true)
 	m._putProp("log", r.newNativeFunc(r.math_log, nil, "log", nil, 1), true, false, true)
+	m._putProp("log1p", r.newNativeFunc(r.math_log1p, nil, "log1p", nil, 1), true, false, true)
+	m._putProp("log10", r.newNativeFunc(r.math_log10, nil, "log10", nil, 1), true, false, true)
+	m._putProp("log2", r.newNativeFunc(r.math_log2, nil, "log2", nil, 1), true, false, true)
 	m._putProp("max", r.newNativeFunc(r.math_max, nil, "max", nil, 2), true, false, true)
 	m._putProp("min", r.newNativeFunc(r.math_min, nil, "min", nil, 2), true, false, true)
 	m._putProp("pow", r.newNativeFunc(r.math_pow, nil, "pow", nil, 2), true, false, true)
 	m._putProp("random", r.newNativeFunc(r.math_random, nil, "random", nil, 0), true, false, true)
 	m._putProp("round", r.newNativeFunc(r.math_round, nil, "round", nil, 1), true, false, true)
+	m._putProp("sign", r.newNativeFunc(r.math_sign, nil, "sign", nil, 1), true, false, true)
 	m._putProp("sin", r.newNativeFunc(r.math_sin, nil, "sin", nil, 1), true, false, true)
+	m._putProp("sinh", r.newNativeFunc(r.math_sinh, nil, "sinh", nil, 1), true, false, true)
 	m._putProp("sqrt", r.newNativeFunc(r.math_sqrt, nil, "sqrt", nil, 1), true, false, true)
 	m._putProp("tan", r.newNativeFunc(r.math_tan, nil, "tan", nil, 1), true, false, true)
+	m._putProp("tanh", r.newNativeFunc(r.math_tanh, nil, "tanh", nil, 1), true, false, true)
+	m._putProp("trunc", r.newNativeFunc(r.math_trunc, nil, "trunc", nil, 1), true, false, true)
 
 	return m
 }

object.go

@@ -16,6 +16,7 @@ const (
 	classWeakSet  = "WeakSet"
 	classWeakMap  = "WeakMap"
 	classMap      = "Map"
+	classMath     = "Math"
 	classSet      = "Set"
 	classFunction = "Function"
 	classNumber   = "Number"

tc39_test.go

@@ -111,6 +111,7 @@ var (
 		"19.1",
 		"19.4",
 		"20.1",
+		"20.2",
 		"20.3",
 		"21.1",
 		"21.2.5.6",
@@ -138,6 +139,7 @@ var (
 		"sec-string.prototype",
 		"sec-date",
 		"sec-number",
+		"sec-math",
 	}
 )