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- package goja
- import (
- "math"
- "math/bits"
- "reflect"
- "github.com/dop251/goja/unistring"
- )
- type objectGoSliceReflect struct {
- objectGoArrayReflect
- }
- func (o *objectGoSliceReflect) init() {
- o.objectGoArrayReflect._init()
- o.lengthProp.writable = true
- o.putIdx = o._putIdx
- }
- func (o *objectGoSliceReflect) _putIdx(idx int, v Value, throw bool) bool {
- if idx >= o.fieldsValue.Len() {
- o.grow(idx + 1)
- }
- return o.objectGoArrayReflect._putIdx(idx, v, throw)
- }
- func (o *objectGoSliceReflect) grow(size int) {
- oldcap := o.fieldsValue.Cap()
- if oldcap < size {
- n := reflect.MakeSlice(o.fieldsValue.Type(), size, growCap(size, o.fieldsValue.Len(), oldcap))
- reflect.Copy(n, o.fieldsValue)
- o.fieldsValue.Set(n)
- l := len(o.valueCache)
- if l > size {
- l = size
- }
- for i, w := range o.valueCache[:l] {
- if w != nil {
- w.setReflectValue(o.fieldsValue.Index(i))
- }
- }
- } else {
- tail := o.fieldsValue.Slice(o.fieldsValue.Len(), size)
- zero := reflect.Zero(o.fieldsValue.Type().Elem())
- for i := 0; i < tail.Len(); i++ {
- tail.Index(i).Set(zero)
- }
- o.fieldsValue.SetLen(size)
- }
- }
- func (o *objectGoSliceReflect) shrink(size int) {
- o.valueCache.shrink(size)
- tail := o.fieldsValue.Slice(size, o.fieldsValue.Len())
- zero := reflect.Zero(o.fieldsValue.Type().Elem())
- for i := 0; i < tail.Len(); i++ {
- tail.Index(i).Set(zero)
- }
- o.fieldsValue.SetLen(size)
- }
- func (o *objectGoSliceReflect) putLength(v uint32, throw bool) bool {
- if bits.UintSize == 32 && v > math.MaxInt32 {
- panic(rangeError("Integer value overflows 32-bit int"))
- }
- newLen := int(v)
- curLen := o.fieldsValue.Len()
- if newLen > curLen {
- o.grow(newLen)
- } else if newLen < curLen {
- o.shrink(newLen)
- }
- return true
- }
- func (o *objectGoSliceReflect) setOwnStr(name unistring.String, val Value, throw bool) bool {
- if name == "length" {
- return o.putLength(o.val.runtime.toLengthUint32(val), throw)
- }
- return o.objectGoArrayReflect.setOwnStr(name, val, throw)
- }
- func (o *objectGoSliceReflect) defineOwnPropertyStr(name unistring.String, descr PropertyDescriptor, throw bool) bool {
- if name == "length" {
- return o.val.runtime.defineArrayLength(&o.lengthProp, descr, o.putLength, throw)
- }
- return o.objectGoArrayReflect.defineOwnPropertyStr(name, descr, throw)
- }
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