vendor: update buildkit to v0.19.0-rc1

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/github.com/fxamacker/cbor/v2/encode_map.go

@@ -0,0 +1,94 @@
+// Copyright (c) Faye Amacker. All rights reserved.
+// Licensed under the MIT License. See LICENSE in the project root for license information.
+
+//go:build go1.20
+
+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() interface{} {
+				rk := reflect.New(t.Key()).Elem()
+				return &rk
+			},
+		},
+		vpool: sync.Pool{
+			New: func() interface{} {
+				rv := reflect.New(t.Elem()).Elem()
+				return &rv
+			},
+		},
+	}
+	return mapEncodeFunc{
+		e: mkv.encodeKeyValues,
+	}.encode
+}