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// Copyright (c) Faye Amacker. All rights reserved.
// Licensed under the MIT License. See LICENSE in the project root for license information.
package cbor
import (
"bytes"
"reflect"
"sync"
)
type mapKeyValueEncodeFunc struct {
kf, ef encodeFunc
kpool, vpool sync.Pool
}
func (me *mapKeyValueEncodeFunc) encodeKeyValues(e *bytes.Buffer, em *encMode, v reflect.Value, kvs []keyValue) error {
iterk := me.kpool.Get().(*reflect.Value)
defer func() {
iterk.SetZero()
me.kpool.Put(iterk)
}()
iterv := me.vpool.Get().(*reflect.Value)
defer func() {
iterv.SetZero()
me.vpool.Put(iterv)
}()
if kvs == nil {
for i, iter := 0, v.MapRange(); iter.Next(); i++ {
iterk.SetIterKey(iter)
iterv.SetIterValue(iter)
if err := me.kf(e, em, *iterk); err != nil {
return err
}
if err := me.ef(e, em, *iterv); err != nil {
return err
}
}
return nil
}
initial := e.Len()
for i, iter := 0, v.MapRange(); iter.Next(); i++ {
iterk.SetIterKey(iter)
iterv.SetIterValue(iter)
offset := e.Len()
if err := me.kf(e, em, *iterk); err != nil {
return err
}
valueOffset := e.Len()
if err := me.ef(e, em, *iterv); err != nil {
return err
}
kvs[i] = keyValue{
offset: offset - initial,
valueOffset: valueOffset - initial,
nextOffset: e.Len() - initial,
}
}
return nil
}
func getEncodeMapFunc(t reflect.Type) encodeFunc {
kf, _, _ := getEncodeFunc(t.Key())
ef, _, _ := getEncodeFunc(t.Elem())
if kf == nil || ef == nil {
return nil
}
mkv := &mapKeyValueEncodeFunc{
kf: kf,
ef: ef,
kpool: sync.Pool{
New: func() any {
rk := reflect.New(t.Key()).Elem()
return &rk
},
},
vpool: sync.Pool{
New: func() any {
rv := reflect.New(t.Elem()).Elem()
return &rv
},
},
}
return mapEncodeFunc{
e: mkv.encodeKeyValues,
}.encode
}
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