diff options
Diffstat (limited to 'vendor/google.golang.org/protobuf/internal/impl/codec_field.go')
| -rw-r--r-- | vendor/google.golang.org/protobuf/internal/impl/codec_field.go | 828 |
1 files changed, 828 insertions, 0 deletions
diff --git a/vendor/google.golang.org/protobuf/internal/impl/codec_field.go b/vendor/google.golang.org/protobuf/internal/impl/codec_field.go new file mode 100644 index 000000000..c00744d38 --- /dev/null +++ b/vendor/google.golang.org/protobuf/internal/impl/codec_field.go @@ -0,0 +1,828 @@ +// Copyright 2019 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" + "sync" + + "google.golang.org/protobuf/encoding/protowire" + "google.golang.org/protobuf/proto" + pref "google.golang.org/protobuf/reflect/protoreflect" + preg "google.golang.org/protobuf/reflect/protoregistry" + piface "google.golang.org/protobuf/runtime/protoiface" +) + +type errInvalidUTF8 struct{} + +func (errInvalidUTF8) Error() string { return "string field contains invalid UTF-8" } +func (errInvalidUTF8) InvalidUTF8() bool { return true } + +// initOneofFieldCoders initializes the fast-path functions for the fields in a oneof. +// +// For size, marshal, and isInit operations, functions are set only on the first field +// in the oneof. The functions are called when the oneof is non-nil, and will dispatch +// to the appropriate field-specific function as necessary. +// +// The unmarshal function is set on each field individually as usual. +func (mi *MessageInfo) initOneofFieldCoders(od pref.OneofDescriptor, si structInfo) { + fs := si.oneofsByName[od.Name()] + ft := fs.Type + oneofFields := make(map[reflect.Type]*coderFieldInfo) + needIsInit := false + fields := od.Fields() + for i, lim := 0, fields.Len(); i < lim; i++ { + fd := od.Fields().Get(i) + num := fd.Number() + // Make a copy of the original coderFieldInfo for use in unmarshaling. + // + // oneofFields[oneofType].funcs.marshal is the field-specific marshal function. + // + // mi.coderFields[num].marshal is set on only the first field in the oneof, + // and dispatches to the field-specific marshaler in oneofFields. + cf := *mi.coderFields[num] + ot := si.oneofWrappersByNumber[num] + cf.ft = ot.Field(0).Type + cf.mi, cf.funcs = fieldCoder(fd, cf.ft) + oneofFields[ot] = &cf + if cf.funcs.isInit != nil { + needIsInit = true + } + mi.coderFields[num].funcs.unmarshal = func(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (unmarshalOutput, error) { + var vw reflect.Value // pointer to wrapper type + vi := p.AsValueOf(ft).Elem() // oneof field value of interface kind + if !vi.IsNil() && !vi.Elem().IsNil() && vi.Elem().Elem().Type() == ot { + vw = vi.Elem() + } else { + vw = reflect.New(ot) + } + out, err := cf.funcs.unmarshal(b, pointerOfValue(vw).Apply(zeroOffset), wtyp, &cf, opts) + if err != nil { + return out, err + } + vi.Set(vw) + return out, nil + } + } + getInfo := func(p pointer) (pointer, *coderFieldInfo) { + v := p.AsValueOf(ft).Elem() + if v.IsNil() { + return pointer{}, nil + } + v = v.Elem() // interface -> *struct + if v.IsNil() { + return pointer{}, nil + } + return pointerOfValue(v).Apply(zeroOffset), oneofFields[v.Elem().Type()] + } + first := mi.coderFields[od.Fields().Get(0).Number()] + first.funcs.size = func(p pointer, _ *coderFieldInfo, opts marshalOptions) int { + p, info := getInfo(p) + if info == nil || info.funcs.size == nil { + return 0 + } + return info.funcs.size(p, info, opts) + } + first.funcs.marshal = func(b []byte, p pointer, _ *coderFieldInfo, opts marshalOptions) ([]byte, error) { + p, info := getInfo(p) + if info == nil || info.funcs.marshal == nil { + return b, nil + } + return info.funcs.marshal(b, p, info, opts) + } + first.funcs.merge = func(dst, src pointer, _ *coderFieldInfo, opts mergeOptions) { + srcp, srcinfo := getInfo(src) + if srcinfo == nil || srcinfo.funcs.merge == nil { + return + } + dstp, dstinfo := getInfo(dst) + if dstinfo != srcinfo { + dst.AsValueOf(ft).Elem().Set(reflect.New(src.AsValueOf(ft).Elem().Elem().Elem().Type())) + dstp = pointerOfValue(dst.AsValueOf(ft).Elem().Elem()).Apply(zeroOffset) + } + srcinfo.funcs.merge(dstp, srcp, srcinfo, opts) + } + if needIsInit { + first.funcs.isInit = func(p pointer, _ *coderFieldInfo) error { + p, info := getInfo(p) + if info == nil || info.funcs.isInit == nil { + return nil + } + return info.funcs.isInit(p, info) + } + } +} + +func makeWeakMessageFieldCoder(fd pref.FieldDescriptor) pointerCoderFuncs { + var once sync.Once + var messageType pref.MessageType + lazyInit := func() { + once.Do(func() { + messageName := fd.Message().FullName() + messageType, _ = preg.GlobalTypes.FindMessageByName(messageName) + }) + } + + return pointerCoderFuncs{ + size: func(p pointer, f *coderFieldInfo, opts marshalOptions) int { + m, ok := p.WeakFields().get(f.num) + if !ok { + return 0 + } + lazyInit() + if messageType == nil { + panic(fmt.Sprintf("weak message %v is not linked in", fd.Message().FullName())) + } + return sizeMessage(m, f.tagsize, opts) + }, + marshal: func(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { + m, ok := p.WeakFields().get(f.num) + if !ok { + return b, nil + } + lazyInit() + if messageType == nil { + panic(fmt.Sprintf("weak message %v is not linked in", fd.Message().FullName())) + } + return appendMessage(b, m, f.wiretag, opts) + }, + unmarshal: func(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (unmarshalOutput, error) { + fs := p.WeakFields() + m, ok := fs.get(f.num) + if !ok { + lazyInit() + if messageType == nil { + return unmarshalOutput{}, errUnknown + } + m = messageType.New().Interface() + fs.set(f.num, m) + } + return consumeMessage(b, m, wtyp, opts) + }, + isInit: func(p pointer, f *coderFieldInfo) error { + m, ok := p.WeakFields().get(f.num) + if !ok { + return nil + } + return proto.CheckInitialized(m) + }, + merge: func(dst, src pointer, f *coderFieldInfo, opts mergeOptions) { + sm, ok := src.WeakFields().get(f.num) + if !ok { + return + } + dm, ok := dst.WeakFields().get(f.num) + if !ok { + lazyInit() + if messageType == nil { + panic(fmt.Sprintf("weak message %v is not linked in", fd.Message().FullName())) + } + dm = messageType.New().Interface() + dst.WeakFields().set(f.num, dm) + } + opts.Merge(dm, sm) + }, + } +} + +func makeMessageFieldCoder(fd pref.FieldDescriptor, ft reflect.Type) pointerCoderFuncs { + if mi := getMessageInfo(ft); mi != nil { + funcs := pointerCoderFuncs{ + size: sizeMessageInfo, + marshal: appendMessageInfo, + unmarshal: consumeMessageInfo, + merge: mergeMessage, + } + if needsInitCheck(mi.Desc) { + funcs.isInit = isInitMessageInfo + } + return funcs + } else { + return pointerCoderFuncs{ + size: func(p pointer, f *coderFieldInfo, opts marshalOptions) int { + m := asMessage(p.AsValueOf(ft).Elem()) + return sizeMessage(m, f.tagsize, opts) + }, + marshal: func(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { + m := asMessage(p.AsValueOf(ft).Elem()) + return appendMessage(b, m, f.wiretag, opts) + }, + unmarshal: func(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (unmarshalOutput, error) { + mp := p.AsValueOf(ft).Elem() + if mp.IsNil() { + mp.Set(reflect.New(ft.Elem())) + } + return consumeMessage(b, asMessage(mp), wtyp, opts) + }, + isInit: func(p pointer, f *coderFieldInfo) error { + m := asMessage(p.AsValueOf(ft).Elem()) + return proto.CheckInitialized(m) + }, + merge: mergeMessage, + } + } +} + +func sizeMessageInfo(p pointer, f *coderFieldInfo, opts marshalOptions) int { + return protowire.SizeBytes(f.mi.sizePointer(p.Elem(), opts)) + f.tagsize +} + +func appendMessageInfo(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { + b = protowire.AppendVarint(b, f.wiretag) + b = protowire.AppendVarint(b, uint64(f.mi.sizePointer(p.Elem(), opts))) + return f.mi.marshalAppendPointer(b, p.Elem(), opts) +} + +func consumeMessageInfo(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, protowire.ParseError(n) + } + if p.Elem().IsNil() { + p.SetPointer(pointerOfValue(reflect.New(f.mi.GoReflectType.Elem()))) + } + o, err := f.mi.unmarshalPointer(v, p.Elem(), 0, opts) + if err != nil { + return out, err + } + out.n = n + out.initialized = o.initialized + return out, nil +} + +func isInitMessageInfo(p pointer, f *coderFieldInfo) error { + return f.mi.checkInitializedPointer(p.Elem()) +} + +func sizeMessage(m proto.Message, tagsize int, _ marshalOptions) int { + return protowire.SizeBytes(proto.Size(m)) + tagsize +} + +func appendMessage(b []byte, m proto.Message, wiretag uint64, opts marshalOptions) ([]byte, error) { + b = protowire.AppendVarint(b, wiretag) + b = protowire.AppendVarint(b, uint64(proto.Size(m))) + return opts.Options().MarshalAppend(b, m) +} + +func consumeMessage(b []byte, m proto.Message, wtyp protowire.Type, opts unmarshalOptions) (out unmarshalOutput, err error) { + if wtyp != protowire.BytesType { + return out, errUnknown + } + v, n := protowire.ConsumeBytes(b) + if n < 0 { + return out, protowire.ParseError(n) + } + o, err := opts.Options().UnmarshalState(piface.UnmarshalInput{ + Buf: v, + Message: m.ProtoReflect(), + }) + if err != nil { + return out, err + } + out.n = n + out.initialized = o.Flags&piface.UnmarshalInitialized != 0 + return out, nil +} + +func sizeMessageValue(v pref.Value, tagsize int, opts marshalOptions) int { + m := v.Message().Interface() + return sizeMessage(m, tagsize, opts) +} + +func appendMessageValue(b []byte, v pref.Value, wiretag uint64, opts marshalOptions) ([]byte, error) { + m := v.Message().Interface() + return appendMessage(b, m, wiretag, opts) +} + +func consumeMessageValue(b []byte, v pref.Value, _ protowire.Number, wtyp protowire.Type, opts unmarshalOptions) (pref.Value, unmarshalOutput, error) { + m := v.Message().Interface() + out, err := consumeMessage(b, m, wtyp, opts) + return v, out, err +} + +func isInitMessageValue(v pref.Value) error { + m := v.Message().Interface() + return proto.CheckInitialized(m) +} + +var coderMessageValue = valueCoderFuncs{ + size: sizeMessageValue, + marshal: appendMessageValue, + unmarshal: consumeMessageValue, + isInit: isInitMessageValue, + merge: mergeMessageValue, +} + +func sizeGroupValue(v pref.Value, tagsize int, opts marshalOptions) int { + m := v.Message().Interface() + return sizeGroup(m, tagsize, opts) +} + +func appendGroupValue(b []byte, v pref.Value, wiretag uint64, opts marshalOptions) ([]byte, error) { + m := v.Message().Interface() + return appendGroup(b, m, wiretag, opts) +} + +func consumeGroupValue(b []byte, v pref.Value, num protowire.Number, wtyp protowire.Type, opts unmarshalOptions) (pref.Value, unmarshalOutput, error) { + m := v.Message().Interface() + out, err := consumeGroup(b, m, num, wtyp, opts) + return v, out, err +} + +var coderGroupValue = valueCoderFuncs{ + size: sizeGroupValue, + marshal: appendGroupValue, + unmarshal: consumeGroupValue, + isInit: isInitMessageValue, + merge: mergeMessageValue, +} + +func makeGroupFieldCoder(fd pref.FieldDescriptor, ft reflect.Type) pointerCoderFuncs { + num := fd.Number() + if mi := getMessageInfo(ft); mi != nil { + funcs := pointerCoderFuncs{ + size: sizeGroupType, + marshal: appendGroupType, + unmarshal: consumeGroupType, + merge: mergeMessage, + } + if needsInitCheck(mi.Desc) { + funcs.isInit = isInitMessageInfo + } + return funcs + } else { + return pointerCoderFuncs{ + size: func(p pointer, f *coderFieldInfo, opts marshalOptions) int { + m := asMessage(p.AsValueOf(ft).Elem()) + return sizeGroup(m, f.tagsize, opts) + }, + marshal: func(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { + m := asMessage(p.AsValueOf(ft).Elem()) + return appendGroup(b, m, f.wiretag, opts) + }, + unmarshal: func(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (unmarshalOutput, error) { + mp := p.AsValueOf(ft).Elem() + if mp.IsNil() { + mp.Set(reflect.New(ft.Elem())) + } + return consumeGroup(b, asMessage(mp), num, wtyp, opts) + }, + isInit: func(p pointer, f *coderFieldInfo) error { + m := asMessage(p.AsValueOf(ft).Elem()) + return proto.CheckInitialized(m) + }, + merge: mergeMessage, + } + } +} + +func sizeGroupType(p pointer, f *coderFieldInfo, opts marshalOptions) int { + return 2*f.tagsize + f.mi.sizePointer(p.Elem(), opts) +} + +func appendGroupType(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.Elem(), opts) + b = protowire.AppendVarint(b, f.wiretag+1) // end group + return b, err +} + +func consumeGroupType(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (out unmarshalOutput, err error) { + if wtyp != protowire.StartGroupType { + return out, errUnknown + } + if p.Elem().IsNil() { + p.SetPointer(pointerOfValue(reflect.New(f.mi.GoReflectType.Elem()))) + } + return f.mi.unmarshalPointer(b, p.Elem(), f.num, opts) +} + +func sizeGroup(m proto.Message, tagsize int, _ marshalOptions) int { + return 2*tagsize + proto.Size(m) +} + +func appendGroup(b []byte, m proto.Message, wiretag uint64, opts marshalOptions) ([]byte, error) { + b = protowire.AppendVarint(b, wiretag) // start group + b, err := opts.Options().MarshalAppend(b, m) + b = protowire.AppendVarint(b, wiretag+1) // end group + return b, err +} + +func consumeGroup(b []byte, m proto.Message, num protowire.Number, wtyp protowire.Type, opts unmarshalOptions) (out unmarshalOutput, err error) { + if wtyp != protowire.StartGroupType { + return out, errUnknown + } + b, n := protowire.ConsumeGroup(num, b) + if n < 0 { + return out, protowire.ParseError(n) + } + o, err := opts.Options().UnmarshalState(piface.UnmarshalInput{ + Buf: b, + Message: m.ProtoReflect(), + }) + if err != nil { + return out, err + } + out.n = n + out.initialized = o.Flags&piface.UnmarshalInitialized != 0 + return out, nil +} + +func makeMessageSliceFieldCoder(fd pref.FieldDescriptor, ft reflect.Type) pointerCoderFuncs { + if mi := getMessageInfo(ft); mi != nil { + funcs := pointerCoderFuncs{ + size: sizeMessageSliceInfo, + marshal: appendMessageSliceInfo, + unmarshal: consumeMessageSliceInfo, + merge: mergeMessageSlice, + } + if needsInitCheck(mi.Desc) { + funcs.isInit = isInitMessageSliceInfo + } + return funcs + } + return pointerCoderFuncs{ + size: func(p pointer, f *coderFieldInfo, opts marshalOptions) int { + return sizeMessageSlice(p, ft, f.tagsize, opts) + }, + marshal: func(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { + return appendMessageSlice(b, p, f.wiretag, ft, opts) + }, + unmarshal: func(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (unmarshalOutput, error) { + return consumeMessageSlice(b, p, ft, wtyp, opts) + }, + isInit: func(p pointer, f *coderFieldInfo) error { + return isInitMessageSlice(p, ft) + }, + merge: mergeMessageSlice, + } +} + +func sizeMessageSliceInfo(p pointer, f *coderFieldInfo, opts marshalOptions) int { + s := p.PointerSlice() + n := 0 + for _, v := range s { + n += protowire.SizeBytes(f.mi.sizePointer(v, opts)) + f.tagsize + } + return n +} + +func appendMessageSliceInfo(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { + s := p.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)) + b, err = f.mi.marshalAppendPointer(b, v, opts) + if err != nil { + return b, err + } + } + return b, nil +} + +func consumeMessageSliceInfo(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, protowire.ParseError(n) + } + m := reflect.New(f.mi.GoReflectType.Elem()).Interface() + mp := pointerOfIface(m) + o, err := f.mi.unmarshalPointer(v, mp, 0, opts) + if err != nil { + return out, err + } + p.AppendPointerSlice(mp) + out.n = n + out.initialized = o.initialized + return out, nil +} + +func isInitMessageSliceInfo(p pointer, f *coderFieldInfo) error { + s := p.PointerSlice() + for _, v := range s { + if err := f.mi.checkInitializedPointer(v); err != nil { + return err + } + } + return nil +} + +func sizeMessageSlice(p pointer, goType reflect.Type, tagsize int, _ marshalOptions) int { + s := p.PointerSlice() + n := 0 + for _, v := range s { + m := asMessage(v.AsValueOf(goType.Elem())) + n += protowire.SizeBytes(proto.Size(m)) + tagsize + } + return n +} + +func appendMessageSlice(b []byte, p pointer, wiretag uint64, goType reflect.Type, opts marshalOptions) ([]byte, error) { + s := p.PointerSlice() + var err error + for _, v := range s { + m := asMessage(v.AsValueOf(goType.Elem())) + b = protowire.AppendVarint(b, wiretag) + siz := proto.Size(m) + b = protowire.AppendVarint(b, uint64(siz)) + b, err = opts.Options().MarshalAppend(b, m) + if err != nil { + return b, err + } + } + return b, nil +} + +func consumeMessageSlice(b []byte, p pointer, goType reflect.Type, wtyp protowire.Type, opts unmarshalOptions) (out unmarshalOutput, err error) { + if wtyp != protowire.BytesType { + return out, errUnknown + } + v, n := protowire.ConsumeBytes(b) + if n < 0 { + return out, protowire.ParseError(n) + } + mp := reflect.New(goType.Elem()) + o, err := opts.Options().UnmarshalState(piface.UnmarshalInput{ + Buf: v, + Message: asMessage(mp).ProtoReflect(), + }) + if err != nil { + return out, err + } + p.AppendPointerSlice(pointerOfValue(mp)) + out.n = n + out.initialized = o.Flags&piface.UnmarshalInitialized != 0 + return out, nil +} + +func isInitMessageSlice(p pointer, goType reflect.Type) error { + s := p.PointerSlice() + for _, v := range s { + m := asMessage(v.AsValueOf(goType.Elem())) + if err := proto.CheckInitialized(m); err != nil { + return err + } + } + return nil +} + +// Slices of messages + +func sizeMessageSliceValue(listv pref.Value, tagsize int, opts marshalOptions) int { + list := listv.List() + n := 0 + for i, llen := 0, list.Len(); i < llen; i++ { + m := list.Get(i).Message().Interface() + n += protowire.SizeBytes(proto.Size(m)) + tagsize + } + return n +} + +func appendMessageSliceValue(b []byte, listv pref.Value, wiretag uint64, opts marshalOptions) ([]byte, error) { + list := listv.List() + mopts := opts.Options() + for i, llen := 0, list.Len(); i < llen; i++ { + m := list.Get(i).Message().Interface() + b = protowire.AppendVarint(b, wiretag) + siz := proto.Size(m) + b = protowire.AppendVarint(b, uint64(siz)) + var err error + b, err = mopts.MarshalAppend(b, m) + if err != nil { + return b, err + } + } + return b, nil +} + +func consumeMessageSliceValue(b []byte, listv pref.Value, _ protowire.Number, wtyp protowire.Type, opts unmarshalOptions) (_ pref.Value, out unmarshalOutput, err error) { + list := listv.List() + if wtyp != protowire.BytesType { + return pref.Value{}, out, errUnknown + } + v, n := protowire.ConsumeBytes(b) + if n < 0 { + return pref.Value{}, out, protowire.ParseError(n) + } + m := list.NewElement() + o, err := opts.Options().UnmarshalState(piface.UnmarshalInput{ + Buf: v, + Message: m.Message(), + }) + if err != nil { + return pref.Value{}, out, err + } + list.Append(m) + out.n = n + out.initialized = o.Flags&piface.UnmarshalInitialized != 0 + return listv, out, nil +} + +func isInitMessageSliceValue(listv pref.Value) error { + list := listv.List() + for i, llen := 0, list.Len(); i < llen; i++ { + m := list.Get(i).Message().Interface() + if err := proto.CheckInitialized(m); err != nil { + return err + } + } + return nil +} + +var coderMessageSliceValue = valueCoderFuncs{ + size: sizeMessageSliceValue, + marshal: appendMessageSliceValue, + unmarshal: consumeMessageSliceValue, + isInit: isInitMessageSliceValue, + merge: mergeMessageListValue, +} + +func sizeGroupSliceValue(listv pref.Value, tagsize int, opts marshalOptions) int { + list := listv.List() + n := 0 + for i, llen := 0, list.Len(); i < llen; i++ { + m := list.Get(i).Message().Interface() + n += 2*tagsize + proto.Size(m) + } + return n +} + +func appendGroupSliceValue(b []byte, listv pref.Value, wiretag uint64, opts marshalOptions) ([]byte, error) { + list := listv.List() + mopts := opts.Options() + for i, llen := 0, list.Len(); i < llen; i++ { + m := list.Get(i).Message().Interface() + b = protowire.AppendVarint(b, wiretag) // start group + var err error + b, err = mopts.MarshalAppend(b, m) + if err != nil { + return b, err + } + b = protowire.AppendVarint(b, wiretag+1) // end group + } + return b, nil +} + +func consumeGroupSliceValue(b []byte, listv pref.Value, num protowire.Number, wtyp protowire.Type, opts unmarshalOptions) (_ pref.Value, out unmarshalOutput, err error) { + list := listv.List() + if wtyp != protowire.StartGroupType { + return pref.Value{}, out, errUnknown + } + b, n := protowire.ConsumeGroup(num, b) + if n < 0 { + return pref.Value{}, out, protowire.ParseError(n) + } + m := list.NewElement() + o, err := opts.Options().UnmarshalState(piface.UnmarshalInput{ + Buf: b, + Message: m.Message(), + }) + if err != nil { + return pref.Value{}, out, err + } + list.Append(m) + out.n = n + out.initialized = o.Flags&piface.UnmarshalInitialized != 0 + return listv, out, nil +} + +var coderGroupSliceValue = valueCoderFuncs{ + size: sizeGroupSliceValue, + marshal: appendGroupSliceValue, + unmarshal: consumeGroupSliceValue, + isInit: isInitMessageSliceValue, + merge: mergeMessageListValue, +} + +func makeGroupSliceFieldCoder(fd pref.FieldDescriptor, ft reflect.Type) pointerCoderFuncs { + num := fd.Number() + if mi := getMessageInfo(ft); mi != nil { + funcs := pointerCoderFuncs{ + size: sizeGroupSliceInfo, + marshal: appendGroupSliceInfo, + unmarshal: consumeGroupSliceInfo, + merge: mergeMessageSlice, + } + if needsInitCheck(mi.Desc) { + funcs.isInit = isInitMessageSliceInfo + } + return funcs + } + return pointerCoderFuncs{ + size: func(p pointer, f *coderFieldInfo, opts marshalOptions) int { + return sizeGroupSlice(p, ft, f.tagsize, opts) + }, + marshal: func(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { + return appendGroupSlice(b, p, f.wiretag, ft, opts) + }, + unmarshal: func(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (unmarshalOutput, error) { + return consumeGroupSlice(b, p, num, wtyp, ft, opts) + }, + isInit: func(p pointer, f *coderFieldInfo) error { + return isInitMessageSlice(p, ft) + }, + merge: mergeMessageSlice, + } +} + +func sizeGroupSlice(p pointer, messageType reflect.Type, tagsize int, _ marshalOptions) int { + s := p.PointerSlice() + n := 0 + for _, v := range s { + m := asMessage(v.AsValueOf(messageType.Elem())) + n += 2*tagsize + proto.Size(m) + } + return n +} + +func appendGroupSlice(b []byte, p pointer, wiretag uint64, messageType reflect.Type, opts marshalOptions) ([]byte, error) { + s := p.PointerSlice() + var err error + for _, v := range s { + m := asMessage(v.AsValueOf(messageType.Elem())) + b = protowire.AppendVarint(b, wiretag) // start group + b, err = opts.Options().MarshalAppend(b, m) + if err != nil { + return b, err + } + b = protowire.AppendVarint(b, wiretag+1) // end group + } + return b, nil +} + +func consumeGroupSlice(b []byte, p pointer, num protowire.Number, wtyp protowire.Type, goType reflect.Type, opts unmarshalOptions) (out unmarshalOutput, err error) { + if wtyp != protowire.StartGroupType { + return out, errUnknown + } + b, n := protowire.ConsumeGroup(num, b) + if n < 0 { + return out, protowire.ParseError(n) + } + mp := reflect.New(goType.Elem()) + o, err := opts.Options().UnmarshalState(piface.UnmarshalInput{ + Buf: b, + Message: asMessage(mp).ProtoReflect(), + }) + if err != nil { + return out, err + } + p.AppendPointerSlice(pointerOfValue(mp)) + out.n = n + out.initialized = o.Flags&piface.UnmarshalInitialized != 0 + return out, nil +} + +func sizeGroupSliceInfo(p pointer, f *coderFieldInfo, opts marshalOptions) int { + s := p.PointerSlice() + n := 0 + for _, v := range s { + n += 2*f.tagsize + f.mi.sizePointer(v, opts) + } + return n +} + +func appendGroupSliceInfo(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { + s := p.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 consumeGroupSliceInfo(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (unmarshalOutput, error) { + if wtyp != protowire.StartGroupType { + return unmarshalOutput{}, errUnknown + } + m := reflect.New(f.mi.GoReflectType.Elem()).Interface() + mp := pointerOfIface(m) + out, err := f.mi.unmarshalPointer(b, mp, f.num, opts) + if err != nil { + return out, err + } + p.AppendPointerSlice(mp) + return out, nil +} + +func asMessage(v reflect.Value) pref.ProtoMessage { + if m, ok := v.Interface().(pref.ProtoMessage); ok { + return m + } + return legacyWrapMessage(v).Interface() +} |