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- package otto
- import (
- "math"
- "strconv"
- "golang.org/x/text/language"
- "golang.org/x/text/message"
- "golang.org/x/text/number"
- )
- // Number
- func numberValueFromNumberArgumentList(argumentList []Value) Value {
- if len(argumentList) > 0 {
- return argumentList[0].numberValue()
- }
- return intValue(0)
- }
- func builtinNumber(call FunctionCall) Value {
- return numberValueFromNumberArgumentList(call.ArgumentList)
- }
- func builtinNewNumber(obj *object, argumentList []Value) Value {
- return objectValue(obj.runtime.newNumber(numberValueFromNumberArgumentList(argumentList)))
- }
- func builtinNumberToString(call FunctionCall) Value {
- // Will throw a TypeError if ThisObject is not a Number
- value := call.thisClassObject(classNumberName).primitiveValue()
- radix := 10
- radixArgument := call.Argument(0)
- if radixArgument.IsDefined() {
- integer := toIntegerFloat(radixArgument)
- if integer < 2 || integer > 36 {
- panic(call.runtime.panicRangeError("toString() radix must be between 2 and 36"))
- }
- radix = int(integer)
- }
- if radix == 10 {
- return stringValue(value.string())
- }
- return stringValue(numberToStringRadix(value, radix))
- }
- func builtinNumberValueOf(call FunctionCall) Value {
- return call.thisClassObject(classNumberName).primitiveValue()
- }
- func builtinNumberToFixed(call FunctionCall) Value {
- precision := toIntegerFloat(call.Argument(0))
- if 20 < precision || 0 > precision {
- panic(call.runtime.panicRangeError("toFixed() precision must be between 0 and 20"))
- }
- if call.This.IsNaN() {
- return stringValue("NaN")
- }
- if value := call.This.float64(); math.Abs(value) >= 1e21 {
- return stringValue(floatToString(value, 64))
- }
- return stringValue(strconv.FormatFloat(call.This.float64(), 'f', int(precision), 64))
- }
- func builtinNumberToExponential(call FunctionCall) Value {
- if call.This.IsNaN() {
- return stringValue("NaN")
- }
- precision := float64(-1)
- if value := call.Argument(0); value.IsDefined() {
- precision = toIntegerFloat(value)
- if 0 > precision {
- panic(call.runtime.panicRangeError("toString() radix must be between 2 and 36"))
- }
- }
- return stringValue(strconv.FormatFloat(call.This.float64(), 'e', int(precision), 64))
- }
- func builtinNumberToPrecision(call FunctionCall) Value {
- if call.This.IsNaN() {
- return stringValue("NaN")
- }
- value := call.Argument(0)
- if value.IsUndefined() {
- return stringValue(call.This.string())
- }
- precision := toIntegerFloat(value)
- if 1 > precision {
- panic(call.runtime.panicRangeError("toPrecision() precision must be greater than 1"))
- }
- return stringValue(strconv.FormatFloat(call.This.float64(), 'g', int(precision), 64))
- }
- func builtinNumberIsNaN(call FunctionCall) Value {
- if len(call.ArgumentList) < 1 {
- return boolValue(false)
- }
- return boolValue(call.Argument(0).IsNaN())
- }
- func builtinNumberToLocaleString(call FunctionCall) Value {
- value := call.thisClassObject(classNumberName).primitiveValue()
- locale := call.Argument(0)
- lang := defaultLanguage
- if locale.IsDefined() {
- lang = language.MustParse(locale.string())
- }
- p := message.NewPrinter(lang)
- return stringValue(p.Sprintf("%v", number.Decimal(value.value)))
- }
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