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// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package impl
import (
"fmt"
"reflect"
"google.golang.org/protobuf/encoding/protowire"
"google.golang.org/protobuf/internal/errors"
"google.golang.org/protobuf/reflect/protoreflect"
)
func makeOpaqueMessageFieldCoder(fd protoreflect.FieldDescriptor, ft reflect.Type) (*MessageInfo, pointerCoderFuncs) {
mi := getMessageInfo(ft)
if mi == nil {
panic(fmt.Sprintf("invalid field: %v: unsupported message type %v", fd.FullName(), ft))
}
switch fd.Kind() {
case protoreflect.MessageKind:
return mi, pointerCoderFuncs{
size: sizeOpaqueMessage,
marshal: appendOpaqueMessage,
unmarshal: consumeOpaqueMessage,
isInit: isInitOpaqueMessage,
merge: mergeOpaqueMessage,
}
case protoreflect.GroupKind:
return mi, pointerCoderFuncs{
size: sizeOpaqueGroup,
marshal: appendOpaqueGroup,
unmarshal: consumeOpaqueGroup,
isInit: isInitOpaqueMessage,
merge: mergeOpaqueMessage,
}
}
panic("unexpected field kind")
}
func sizeOpaqueMessage(p pointer, f *coderFieldInfo, opts marshalOptions) (size int) {
return protowire.SizeBytes(f.mi.sizePointer(p.AtomicGetPointer(), opts)) + f.tagsize
}
func appendOpaqueMessage(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) {
mp := p.AtomicGetPointer()
calculatedSize := f.mi.sizePointer(mp, opts)
b = protowire.AppendVarint(b, f.wiretag)
b = protowire.AppendVarint(b, uint64(calculatedSize))
before := len(b)
b, err := f.mi.marshalAppendPointer(b, mp, opts)
if measuredSize := len(b) - before; calculatedSize != measuredSize && err == nil {
return nil, errors.MismatchedSizeCalculation(calculatedSize, measuredSize)
}
return b, err
}
func consumeOpaqueMessage(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (out unmarshalOutput, err error) {
if wtyp != protowire.BytesType {
return out, errUnknown
}
v, n := protowire.ConsumeBytes(b)
if n < 0 {
return out, errDecode
}
mp := p.AtomicGetPointer()
if mp.IsNil() {
mp = p.AtomicSetPointerIfNil(pointerOfValue(reflect.New(f.mi.GoReflectType.Elem())))
}
o, err := f.mi.unmarshalPointer(v, mp, 0, opts)
if err != nil {
return out, err
}
out.n = n
out.initialized = o.initialized
return out, nil
}
func isInitOpaqueMessage(p pointer, f *coderFieldInfo) error {
mp := p.AtomicGetPointer()
if mp.IsNil() {
return nil
}
return f.mi.checkInitializedPointer(mp)
}
func mergeOpaqueMessage(dst, src pointer, f *coderFieldInfo, opts mergeOptions) {
dstmp := dst.AtomicGetPointer()
if dstmp.IsNil() {
dstmp = dst.AtomicSetPointerIfNil(pointerOfValue(reflect.New(f.mi.GoReflectType.Elem())))
}
f.mi.mergePointer(dstmp, src.AtomicGetPointer(), opts)
}
func sizeOpaqueGroup(p pointer, f *coderFieldInfo, opts marshalOptions) (size int) {
return 2*f.tagsize + f.mi.sizePointer(p.AtomicGetPointer(), opts)
}
func appendOpaqueGroup(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) {
b = protowire.AppendVarint(b, f.wiretag) // start group
b, err := f.mi.marshalAppendPointer(b, p.AtomicGetPointer(), opts)
b = protowire.AppendVarint(b, f.wiretag+1) // end group
return b, err
}
func consumeOpaqueGroup(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (out unmarshalOutput, err error) {
if wtyp != protowire.StartGroupType {
return out, errUnknown
}
mp := p.AtomicGetPointer()
if mp.IsNil() {
mp = p.AtomicSetPointerIfNil(pointerOfValue(reflect.New(f.mi.GoReflectType.Elem())))
}
o, e := f.mi.unmarshalPointer(b, mp, f.num, opts)
return o, e
}
func makeOpaqueRepeatedMessageFieldCoder(fd protoreflect.FieldDescriptor, ft reflect.Type) (*MessageInfo, pointerCoderFuncs) {
if ft.Kind() != reflect.Ptr || ft.Elem().Kind() != reflect.Slice {
panic(fmt.Sprintf("invalid field: %v: unsupported type for opaque repeated message: %v", fd.FullName(), ft))
}
mt := ft.Elem().Elem() // *[]*T -> *T
mi := getMessageInfo(mt)
if mi == nil {
panic(fmt.Sprintf("invalid field: %v: unsupported message type %v", fd.FullName(), mt))
}
switch fd.Kind() {
case protoreflect.MessageKind:
return mi, pointerCoderFuncs{
size: sizeOpaqueMessageSlice,
marshal: appendOpaqueMessageSlice,
unmarshal: consumeOpaqueMessageSlice,
isInit: isInitOpaqueMessageSlice,
merge: mergeOpaqueMessageSlice,
}
case protoreflect.GroupKind:
return mi, pointerCoderFuncs{
size: sizeOpaqueGroupSlice,
marshal: appendOpaqueGroupSlice,
unmarshal: consumeOpaqueGroupSlice,
isInit: isInitOpaqueMessageSlice,
merge: mergeOpaqueMessageSlice,
}
}
panic("unexpected field kind")
}
func sizeOpaqueMessageSlice(p pointer, f *coderFieldInfo, opts marshalOptions) (size int) {
s := p.AtomicGetPointer().PointerSlice()
n := 0
for _, v := range s {
n += protowire.SizeBytes(f.mi.sizePointer(v, opts)) + f.tagsize
}
return n
}
func appendOpaqueMessageSlice(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) {
s := p.AtomicGetPointer().PointerSlice()
var err error
for _, v := range s {
b = protowire.AppendVarint(b, f.wiretag)
siz := f.mi.sizePointer(v, opts)
b = protowire.AppendVarint(b, uint64(siz))
before := len(b)
b, err = f.mi.marshalAppendPointer(b, v, opts)
if err != nil {
return b, err
}
if measuredSize := len(b) - before; siz != measuredSize {
return nil, errors.MismatchedSizeCalculation(siz, measuredSize)
}
}
return b, nil
}
func consumeOpaqueMessageSlice(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (out unmarshalOutput, err error) {
if wtyp != protowire.BytesType {
return out, errUnknown
}
v, n := protowire.ConsumeBytes(b)
if n < 0 {
return out, errDecode
}
mp := pointerOfValue(reflect.New(f.mi.GoReflectType.Elem()))
o, err := f.mi.unmarshalPointer(v, mp, 0, opts)
if err != nil {
return out, err
}
sp := p.AtomicGetPointer()
if sp.IsNil() {
sp = p.AtomicSetPointerIfNil(pointerOfValue(reflect.New(f.ft.Elem())))
}
sp.AppendPointerSlice(mp)
out.n = n
out.initialized = o.initialized
return out, nil
}
func isInitOpaqueMessageSlice(p pointer, f *coderFieldInfo) error {
sp := p.AtomicGetPointer()
if sp.IsNil() {
return nil
}
s := sp.PointerSlice()
for _, v := range s {
if err := f.mi.checkInitializedPointer(v); err != nil {
return err
}
}
return nil
}
func mergeOpaqueMessageSlice(dst, src pointer, f *coderFieldInfo, opts mergeOptions) {
ds := dst.AtomicGetPointer()
if ds.IsNil() {
ds = dst.AtomicSetPointerIfNil(pointerOfValue(reflect.New(f.ft.Elem())))
}
for _, sp := range src.AtomicGetPointer().PointerSlice() {
dm := pointerOfValue(reflect.New(f.mi.GoReflectType.Elem()))
f.mi.mergePointer(dm, sp, opts)
ds.AppendPointerSlice(dm)
}
}
func sizeOpaqueGroupSlice(p pointer, f *coderFieldInfo, opts marshalOptions) (size int) {
s := p.AtomicGetPointer().PointerSlice()
n := 0
for _, v := range s {
n += 2*f.tagsize + f.mi.sizePointer(v, opts)
}
return n
}
func appendOpaqueGroupSlice(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) {
s := p.AtomicGetPointer().PointerSlice()
var err error
for _, v := range s {
b = protowire.AppendVarint(b, f.wiretag) // start group
b, err = f.mi.marshalAppendPointer(b, v, opts)
if err != nil {
return b, err
}
b = protowire.AppendVarint(b, f.wiretag+1) // end group
}
return b, nil
}
func consumeOpaqueGroupSlice(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (out unmarshalOutput, err error) {
if wtyp != protowire.StartGroupType {
return out, errUnknown
}
mp := pointerOfValue(reflect.New(f.mi.GoReflectType.Elem()))
out, err = f.mi.unmarshalPointer(b, mp, f.num, opts)
if err != nil {
return out, err
}
sp := p.AtomicGetPointer()
if sp.IsNil() {
sp = p.AtomicSetPointerIfNil(pointerOfValue(reflect.New(f.ft.Elem())))
}
sp.AppendPointerSlice(mp)
return out, err
}
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