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|
package goja
import (
"math"
"strconv"
)
func (r *Runtime) numberproto_valueOf(call FunctionCall) Value {
this := call.This
if !isNumber(this) {
r.typeErrorResult(true, "Value is not a number")
}
if _, ok := this.assertInt(); ok {
return this
}
if _, ok := this.assertFloat(); ok {
return this
}
if obj, ok := this.(*Object); ok {
if v, ok := obj.self.(*primitiveValueObject); ok {
return v.pValue
}
}
r.typeErrorResult(true, "Number.prototype.valueOf is not generic")
return nil
}
func isNumber(v Value) bool {
switch t := v.(type) {
case valueFloat, valueInt:
return true
case *Object:
switch t := t.self.(type) {
case *primitiveValueObject:
return isNumber(t.pValue)
}
}
return false
}
func (r *Runtime) numberproto_toString(call FunctionCall) Value {
if !isNumber(call.This) {
r.typeErrorResult(true, "Value is not a number")
}
var radix int
if arg := call.Argument(0); arg != _undefined {
radix = int(arg.ToInteger())
} else {
radix = 10
}
if radix < 2 || radix > 36 {
panic(r.newError(r.global.RangeError, "toString() radix argument must be between 2 and 36"))
}
num := call.This.ToFloat()
if math.IsNaN(num) {
return stringNaN
}
if math.IsInf(num, 1) {
return stringInfinity
}
if math.IsInf(num, -1) {
return stringNegInfinity
}
if radix == 10 {
var fmt byte
if math.Abs(num) >= 1e21 {
fmt = 'e'
} else {
fmt = 'f'
}
return asciiString(strconv.FormatFloat(num, fmt, -1, 64))
}
return asciiString(dtobasestr(num, radix))
}
func (r *Runtime) numberproto_toFixed(call FunctionCall) Value {
prec := call.Argument(0).ToInteger()
if prec < 0 || prec > 20 {
panic(r.newError(r.global.RangeError, "toFixed() precision must be between 0 and 20"))
}
num := call.This.ToFloat()
if math.IsNaN(num) {
return stringNaN
}
if math.Abs(num) >= 1e21 {
return asciiString(strconv.FormatFloat(num, 'g', -1, 64))
}
return asciiString(strconv.FormatFloat(num, 'f', int(prec), 64))
}
func (r *Runtime) numberproto_toExponential(call FunctionCall) Value {
prec := call.Argument(0).ToInteger()
if prec < 0 || prec > 20 {
panic(r.newError(r.global.RangeError, "toExponential() precision must be between 0 and 20"))
}
num := call.This.ToFloat()
if math.IsNaN(num) {
return stringNaN
}
if math.Abs(num) >= 1e21 {
return asciiString(strconv.FormatFloat(num, 'g', -1, 64))
}
return asciiString(strconv.FormatFloat(num, 'e', int(prec), 64))
}
func (r *Runtime) numberproto_toPrecision(call FunctionCall) Value {
prec := call.Argument(0).ToInteger()
if prec < 0 || prec > 20 {
panic(r.newError(r.global.RangeError, "toPrecision() precision must be between 0 and 20"))
}
num := call.This.ToFloat()
if math.IsNaN(num) {
return stringNaN
}
if math.Abs(num) >= 1e21 {
return asciiString(strconv.FormatFloat(num, 'g', -1, 64))
}
return asciiString(strconv.FormatFloat(num, 'g', int(prec), 64))
}
func (r *Runtime) initNumber() {
r.global.NumberPrototype = r.newPrimitiveObject(valueInt(0), r.global.ObjectPrototype, classNumber)
o := r.global.NumberPrototype.self
o._putProp("valueOf", r.newNativeFunc(r.numberproto_valueOf, nil, "valueOf", nil, 0), true, false, true)
o._putProp("toString", r.newNativeFunc(r.numberproto_toString, nil, "toString", nil, 0), true, false, true)
o._putProp("toLocaleString", r.newNativeFunc(r.numberproto_toString, nil, "toLocaleString", nil, 0), true, false, true)
o._putProp("toFixed", r.newNativeFunc(r.numberproto_toFixed, nil, "toFixed", nil, 1), true, false, true)
o._putProp("toExponential", r.newNativeFunc(r.numberproto_toExponential, nil, "toExponential", nil, 1), true, false, true)
o._putProp("toPrecision", r.newNativeFunc(r.numberproto_toPrecision, nil, "toPrecision", nil, 1), true, false, true)
r.global.Number = r.newNativeFunc(r.builtin_Number, r.builtin_newNumber, "Number", r.global.NumberPrototype, 1)
o = r.global.Number.self
o._putProp("MAX_VALUE", valueFloat(math.MaxFloat64), false, false, false)
o._putProp("MIN_VALUE", valueFloat(math.SmallestNonzeroFloat64), false, false, false)
o._putProp("NaN", _NaN, false, false, false)
o._putProp("NEGATIVE_INFINITY", _negativeInf, false, false, false)
o._putProp("POSITIVE_INFINITY", _positiveInf, false, false, false)
o._putProp("EPSILON", _epsilon, false, false, false)
r.addToGlobal("Number", r.global.Number)
}
|
