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