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package goja
import "reflect"
type baseFuncObject struct {
baseObject
nameProp, lenProp valueProperty
}
type funcObject struct {
baseFuncObject
stash *stash
prg *Program
src string
}
type nativeFuncObject struct {
baseFuncObject
f func(FunctionCall) Value
construct func(args []Value) *Object
}
type boundFuncObject struct {
nativeFuncObject
}
func (f *nativeFuncObject) export() interface{} {
return f.f
}
func (f *nativeFuncObject) exportType() reflect.Type {
return reflect.TypeOf(f.f)
}
func (f *funcObject) getPropStr(name string) Value {
switch name {
case "prototype":
if _, exists := f.values["prototype"]; !exists {
return f.addPrototype()
}
}
return f.baseObject.getPropStr(name)
}
func (f *funcObject) addPrototype() Value {
proto := f.val.runtime.NewObject()
proto.self._putProp("constructor", f.val, true, false, true)
return f._putProp("prototype", proto, true, false, false)
}
func (f *funcObject) getProp(n Value) Value {
return f.getPropStr(n.String())
}
func (f *funcObject) hasOwnProperty(n Value) bool {
if r := f.baseObject.hasOwnProperty(n); r {
return true
}
name := n.String()
if name == "prototype" {
return true
}
return false
}
func (f *funcObject) hasOwnPropertyStr(name string) bool {
if r := f.baseObject.hasOwnPropertyStr(name); r {
return true
}
if name == "prototype" {
return true
}
return false
}
func (f *funcObject) construct(args []Value) *Object {
proto := f.getStr("prototype")
var protoObj *Object
if p, ok := proto.(*Object); ok {
protoObj = p
} else {
protoObj = f.val.runtime.global.ObjectPrototype
}
obj := f.val.runtime.newBaseObject(protoObj, classObject).val
ret := f.Call(FunctionCall{
This: obj,
Arguments: args,
})
if ret, ok := ret.(*Object); ok {
return ret
}
return obj
}
func (f *funcObject) Call(call FunctionCall) Value {
vm := f.val.runtime.vm
pc := vm.pc
vm.stack.expand(vm.sp + len(call.Arguments) + 1)
vm.stack[vm.sp] = f.val
vm.sp++
if call.This != nil {
vm.stack[vm.sp] = call.This
} else {
vm.stack[vm.sp] = _undefined
}
vm.sp++
for _, arg := range call.Arguments {
if arg != nil {
vm.stack[vm.sp] = arg
} else {
vm.stack[vm.sp] = _undefined
}
vm.sp++
}
vm.pc = -1
vm.pushCtx()
vm.args = len(call.Arguments)
vm.prg = f.prg
vm.stash = f.stash
vm.pc = 0
vm.run()
vm.pc = pc
vm.halt = false
return vm.pop()
}
func (f *funcObject) export() interface{} {
return f.Call
}
func (f *funcObject) exportType() reflect.Type {
return reflect.TypeOf(f.Call)
}
func (f *funcObject) assertCallable() (func(FunctionCall) Value, bool) {
return f.Call, true
}
func (f *baseFuncObject) init(name string, length int) {
f.baseObject.init()
f.nameProp.configurable = true
f.nameProp.value = newStringValue(name)
f._put("name", &f.nameProp)
f.lenProp.configurable = true
f.lenProp.value = valueInt(length)
f._put("length", &f.lenProp)
}
func (f *baseFuncObject) hasInstance(v Value) bool {
if v, ok := v.(*Object); ok {
o := f.val.self.getStr("prototype")
if o1, ok := o.(*Object); ok {
for {
v = v.self.proto()
if v == nil {
return false
}
if o1 == v {
return true
}
}
} else {
f.val.runtime.typeErrorResult(true, "prototype is not an object")
}
}
return false
}
func (f *nativeFuncObject) defaultConstruct(args []Value) Value {
proto := f.getStr("prototype")
var protoObj *Object
if p, ok := proto.(*Object); ok {
protoObj = p
} else {
protoObj = f.val.runtime.global.ObjectPrototype
}
obj := f.val.runtime.newBaseObject(protoObj, classObject).val
ret := f.f(FunctionCall{
This: obj,
Arguments: args,
})
if ret, ok := ret.(*Object); ok {
return ret
}
return obj
}
func (f *nativeFuncObject) assertCallable() (func(FunctionCall) Value, bool) {
if f.f != nil {
return f.f, true
}
return nil, false
}
func (f *boundFuncObject) getProp(n Value) Value {
return f.getPropStr(n.String())
}
func (f *boundFuncObject) getPropStr(name string) Value {
if name == "caller" || name == "arguments" {
//f.runtime.typeErrorResult(true, "'caller' and 'arguments' are restricted function properties and cannot be accessed in this context.")
return f.val.runtime.global.throwerProperty
}
return f.nativeFuncObject.getPropStr(name)
}
func (f *boundFuncObject) delete(n Value, throw bool) bool {
return f.deleteStr(n.String(), throw)
}
func (f *boundFuncObject) deleteStr(name string, throw bool) bool {
if name == "caller" || name == "arguments" {
return true
}
return f.nativeFuncObject.deleteStr(name, throw)
}
func (f *boundFuncObject) putStr(name string, val Value, throw bool) {
if name == "caller" || name == "arguments" {
f.val.runtime.typeErrorResult(true, "'caller' and 'arguments' are restricted function properties and cannot be accessed in this context.")
}
f.nativeFuncObject.putStr(name, val, throw)
}
func (f *boundFuncObject) put(n Value, val Value, throw bool) {
f.putStr(n.String(), val, throw)
}
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