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path: root/vendor/google.golang.org/protobuf/internal/impl/legacy_message.go
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Diffstat (limited to 'vendor/google.golang.org/protobuf/internal/impl/legacy_message.go')
-rw-r--r--vendor/google.golang.org/protobuf/internal/impl/legacy_message.go572
1 files changed, 0 insertions, 572 deletions
diff --git a/vendor/google.golang.org/protobuf/internal/impl/legacy_message.go b/vendor/google.golang.org/protobuf/internal/impl/legacy_message.go
deleted file mode 100644
index bf0b6049b..000000000
--- a/vendor/google.golang.org/protobuf/internal/impl/legacy_message.go
+++ /dev/null
@@ -1,572 +0,0 @@
-// Copyright 2018 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"
- "strings"
- "sync"
-
- "google.golang.org/protobuf/internal/descopts"
- ptag "google.golang.org/protobuf/internal/encoding/tag"
- "google.golang.org/protobuf/internal/errors"
- "google.golang.org/protobuf/internal/filedesc"
- "google.golang.org/protobuf/internal/strs"
- "google.golang.org/protobuf/reflect/protoreflect"
- "google.golang.org/protobuf/runtime/protoiface"
-)
-
-// legacyWrapMessage wraps v as a protoreflect.Message,
-// where v must be a *struct kind and not implement the v2 API already.
-func legacyWrapMessage(v reflect.Value) protoreflect.Message {
- t := v.Type()
- if t.Kind() != reflect.Ptr || t.Elem().Kind() != reflect.Struct {
- return aberrantMessage{v: v}
- }
- mt := legacyLoadMessageInfo(t, "")
- return mt.MessageOf(v.Interface())
-}
-
-// legacyLoadMessageType dynamically loads a protoreflect.Type for t,
-// where t must be not implement the v2 API already.
-// The provided name is used if it cannot be determined from the message.
-func legacyLoadMessageType(t reflect.Type, name protoreflect.FullName) protoreflect.MessageType {
- if t.Kind() != reflect.Ptr || t.Elem().Kind() != reflect.Struct {
- return aberrantMessageType{t}
- }
- return legacyLoadMessageInfo(t, name)
-}
-
-var legacyMessageTypeCache sync.Map // map[reflect.Type]*MessageInfo
-
-// legacyLoadMessageInfo dynamically loads a *MessageInfo for t,
-// where t must be a *struct kind and not implement the v2 API already.
-// The provided name is used if it cannot be determined from the message.
-func legacyLoadMessageInfo(t reflect.Type, name protoreflect.FullName) *MessageInfo {
- // Fast-path: check if a MessageInfo is cached for this concrete type.
- if mt, ok := legacyMessageTypeCache.Load(t); ok {
- return mt.(*MessageInfo)
- }
-
- // Slow-path: derive message descriptor and initialize MessageInfo.
- mi := &MessageInfo{
- Desc: legacyLoadMessageDesc(t, name),
- GoReflectType: t,
- }
-
- var hasMarshal, hasUnmarshal bool
- v := reflect.Zero(t).Interface()
- if _, hasMarshal = v.(legacyMarshaler); hasMarshal {
- mi.methods.Marshal = legacyMarshal
-
- // We have no way to tell whether the type's Marshal method
- // supports deterministic serialization or not, but this
- // preserves the v1 implementation's behavior of always
- // calling Marshal methods when present.
- mi.methods.Flags |= protoiface.SupportMarshalDeterministic
- }
- if _, hasUnmarshal = v.(legacyUnmarshaler); hasUnmarshal {
- mi.methods.Unmarshal = legacyUnmarshal
- }
- if _, hasMerge := v.(legacyMerger); hasMerge || (hasMarshal && hasUnmarshal) {
- mi.methods.Merge = legacyMerge
- }
-
- if mi, ok := legacyMessageTypeCache.LoadOrStore(t, mi); ok {
- return mi.(*MessageInfo)
- }
- return mi
-}
-
-var legacyMessageDescCache sync.Map // map[reflect.Type]protoreflect.MessageDescriptor
-
-// LegacyLoadMessageDesc returns an MessageDescriptor derived from the Go type,
-// which should be a *struct kind and must not implement the v2 API already.
-//
-// This is exported for testing purposes.
-func LegacyLoadMessageDesc(t reflect.Type) protoreflect.MessageDescriptor {
- return legacyLoadMessageDesc(t, "")
-}
-func legacyLoadMessageDesc(t reflect.Type, name protoreflect.FullName) protoreflect.MessageDescriptor {
- // Fast-path: check if a MessageDescriptor is cached for this concrete type.
- if mi, ok := legacyMessageDescCache.Load(t); ok {
- return mi.(protoreflect.MessageDescriptor)
- }
-
- // Slow-path: initialize MessageDescriptor from the raw descriptor.
- mv := reflect.Zero(t).Interface()
- if _, ok := mv.(protoreflect.ProtoMessage); ok {
- panic(fmt.Sprintf("%v already implements proto.Message", t))
- }
- mdV1, ok := mv.(messageV1)
- if !ok {
- return aberrantLoadMessageDesc(t, name)
- }
-
- // If this is a dynamic message type where there isn't a 1-1 mapping between
- // Go and protobuf types, calling the Descriptor method on the zero value of
- // the message type isn't likely to work. If it panics, swallow the panic and
- // continue as if the Descriptor method wasn't present.
- b, idxs := func() ([]byte, []int) {
- defer func() {
- recover()
- }()
- return mdV1.Descriptor()
- }()
- if b == nil {
- return aberrantLoadMessageDesc(t, name)
- }
-
- // If the Go type has no fields, then this might be a proto3 empty message
- // from before the size cache was added. If there are any fields, check to
- // see that at least one of them looks like something we generated.
- if t.Elem().Kind() == reflect.Struct {
- if nfield := t.Elem().NumField(); nfield > 0 {
- hasProtoField := false
- for i := 0; i < nfield; i++ {
- f := t.Elem().Field(i)
- if f.Tag.Get("protobuf") != "" || f.Tag.Get("protobuf_oneof") != "" || strings.HasPrefix(f.Name, "XXX_") {
- hasProtoField = true
- break
- }
- }
- if !hasProtoField {
- return aberrantLoadMessageDesc(t, name)
- }
- }
- }
-
- md := legacyLoadFileDesc(b).Messages().Get(idxs[0])
- for _, i := range idxs[1:] {
- md = md.Messages().Get(i)
- }
- if name != "" && md.FullName() != name {
- panic(fmt.Sprintf("mismatching message name: got %v, want %v", md.FullName(), name))
- }
- if md, ok := legacyMessageDescCache.LoadOrStore(t, md); ok {
- return md.(protoreflect.MessageDescriptor)
- }
- return md
-}
-
-var (
- aberrantMessageDescLock sync.Mutex
- aberrantMessageDescCache map[reflect.Type]protoreflect.MessageDescriptor
-)
-
-// aberrantLoadMessageDesc returns an MessageDescriptor derived from the Go type,
-// which must not implement protoreflect.ProtoMessage or messageV1.
-//
-// This is a best-effort derivation of the message descriptor using the protobuf
-// tags on the struct fields.
-func aberrantLoadMessageDesc(t reflect.Type, name protoreflect.FullName) protoreflect.MessageDescriptor {
- aberrantMessageDescLock.Lock()
- defer aberrantMessageDescLock.Unlock()
- if aberrantMessageDescCache == nil {
- aberrantMessageDescCache = make(map[reflect.Type]protoreflect.MessageDescriptor)
- }
- return aberrantLoadMessageDescReentrant(t, name)
-}
-func aberrantLoadMessageDescReentrant(t reflect.Type, name protoreflect.FullName) protoreflect.MessageDescriptor {
- // Fast-path: check if an MessageDescriptor is cached for this concrete type.
- if md, ok := aberrantMessageDescCache[t]; ok {
- return md
- }
-
- // Slow-path: construct a descriptor from the Go struct type (best-effort).
- // Cache the MessageDescriptor early on so that we can resolve internal
- // cyclic references.
- md := &filedesc.Message{L2: new(filedesc.MessageL2)}
- md.L0.FullName = aberrantDeriveMessageName(t, name)
- md.L0.ParentFile = filedesc.SurrogateProto2
- aberrantMessageDescCache[t] = md
-
- if t.Kind() != reflect.Ptr || t.Elem().Kind() != reflect.Struct {
- return md
- }
-
- // Try to determine if the message is using proto3 by checking scalars.
- for i := 0; i < t.Elem().NumField(); i++ {
- f := t.Elem().Field(i)
- if tag := f.Tag.Get("protobuf"); tag != "" {
- switch f.Type.Kind() {
- case reflect.Bool, reflect.Int32, reflect.Int64, reflect.Uint32, reflect.Uint64, reflect.Float32, reflect.Float64, reflect.String:
- md.L0.ParentFile = filedesc.SurrogateProto3
- }
- for _, s := range strings.Split(tag, ",") {
- if s == "proto3" {
- md.L0.ParentFile = filedesc.SurrogateProto3
- }
- }
- }
- }
-
- md.L1.EditionFeatures = md.L0.ParentFile.L1.EditionFeatures
- // Obtain a list of oneof wrapper types.
- var oneofWrappers []reflect.Type
- methods := make([]reflect.Method, 0, 2)
- if m, ok := t.MethodByName("XXX_OneofFuncs"); ok {
- methods = append(methods, m)
- }
- if m, ok := t.MethodByName("XXX_OneofWrappers"); ok {
- methods = append(methods, m)
- }
- for _, fn := range methods {
- for _, v := range fn.Func.Call([]reflect.Value{reflect.Zero(fn.Type.In(0))}) {
- if vs, ok := v.Interface().([]any); ok {
- for _, v := range vs {
- oneofWrappers = append(oneofWrappers, reflect.TypeOf(v))
- }
- }
- }
- }
-
- // Obtain a list of the extension ranges.
- if fn, ok := t.MethodByName("ExtensionRangeArray"); ok {
- vs := fn.Func.Call([]reflect.Value{reflect.Zero(fn.Type.In(0))})[0]
- for i := 0; i < vs.Len(); i++ {
- v := vs.Index(i)
- md.L2.ExtensionRanges.List = append(md.L2.ExtensionRanges.List, [2]protoreflect.FieldNumber{
- protoreflect.FieldNumber(v.FieldByName("Start").Int()),
- protoreflect.FieldNumber(v.FieldByName("End").Int() + 1),
- })
- md.L2.ExtensionRangeOptions = append(md.L2.ExtensionRangeOptions, nil)
- }
- }
-
- // Derive the message fields by inspecting the struct fields.
- for i := 0; i < t.Elem().NumField(); i++ {
- f := t.Elem().Field(i)
- if tag := f.Tag.Get("protobuf"); tag != "" {
- tagKey := f.Tag.Get("protobuf_key")
- tagVal := f.Tag.Get("protobuf_val")
- aberrantAppendField(md, f.Type, tag, tagKey, tagVal)
- }
- if tag := f.Tag.Get("protobuf_oneof"); tag != "" {
- n := len(md.L2.Oneofs.List)
- md.L2.Oneofs.List = append(md.L2.Oneofs.List, filedesc.Oneof{})
- od := &md.L2.Oneofs.List[n]
- od.L0.FullName = md.FullName().Append(protoreflect.Name(tag))
- od.L0.ParentFile = md.L0.ParentFile
- od.L1.EditionFeatures = md.L1.EditionFeatures
- od.L0.Parent = md
- od.L0.Index = n
-
- for _, t := range oneofWrappers {
- if t.Implements(f.Type) {
- f := t.Elem().Field(0)
- if tag := f.Tag.Get("protobuf"); tag != "" {
- aberrantAppendField(md, f.Type, tag, "", "")
- fd := &md.L2.Fields.List[len(md.L2.Fields.List)-1]
- fd.L1.ContainingOneof = od
- fd.L1.EditionFeatures = od.L1.EditionFeatures
- od.L1.Fields.List = append(od.L1.Fields.List, fd)
- }
- }
- }
- }
- }
-
- return md
-}
-
-func aberrantDeriveMessageName(t reflect.Type, name protoreflect.FullName) protoreflect.FullName {
- if name.IsValid() {
- return name
- }
- func() {
- defer func() { recover() }() // swallow possible nil panics
- if m, ok := reflect.Zero(t).Interface().(interface{ XXX_MessageName() string }); ok {
- name = protoreflect.FullName(m.XXX_MessageName())
- }
- }()
- if name.IsValid() {
- return name
- }
- if t.Kind() == reflect.Ptr {
- t = t.Elem()
- }
- return AberrantDeriveFullName(t)
-}
-
-func aberrantAppendField(md *filedesc.Message, goType reflect.Type, tag, tagKey, tagVal string) {
- t := goType
- isOptional := t.Kind() == reflect.Ptr && t.Elem().Kind() != reflect.Struct
- isRepeated := t.Kind() == reflect.Slice && t.Elem().Kind() != reflect.Uint8
- if isOptional || isRepeated {
- t = t.Elem()
- }
- fd := ptag.Unmarshal(tag, t, placeholderEnumValues{}).(*filedesc.Field)
-
- // Append field descriptor to the message.
- n := len(md.L2.Fields.List)
- md.L2.Fields.List = append(md.L2.Fields.List, *fd)
- fd = &md.L2.Fields.List[n]
- fd.L0.FullName = md.FullName().Append(fd.Name())
- fd.L0.ParentFile = md.L0.ParentFile
- fd.L0.Parent = md
- fd.L0.Index = n
-
- if fd.L1.IsWeak || fd.L1.EditionFeatures.IsPacked {
- fd.L1.Options = func() protoreflect.ProtoMessage {
- opts := descopts.Field.ProtoReflect().New()
- if fd.L1.IsWeak {
- opts.Set(opts.Descriptor().Fields().ByName("weak"), protoreflect.ValueOfBool(true))
- }
- if fd.L1.EditionFeatures.IsPacked {
- opts.Set(opts.Descriptor().Fields().ByName("packed"), protoreflect.ValueOfBool(fd.L1.EditionFeatures.IsPacked))
- }
- return opts.Interface()
- }
- }
-
- // Populate Enum and Message.
- if fd.Enum() == nil && fd.Kind() == protoreflect.EnumKind {
- switch v := reflect.Zero(t).Interface().(type) {
- case protoreflect.Enum:
- fd.L1.Enum = v.Descriptor()
- default:
- fd.L1.Enum = LegacyLoadEnumDesc(t)
- }
- }
- if fd.Message() == nil && (fd.Kind() == protoreflect.MessageKind || fd.Kind() == protoreflect.GroupKind) {
- switch v := reflect.Zero(t).Interface().(type) {
- case protoreflect.ProtoMessage:
- fd.L1.Message = v.ProtoReflect().Descriptor()
- case messageV1:
- fd.L1.Message = LegacyLoadMessageDesc(t)
- default:
- if t.Kind() == reflect.Map {
- n := len(md.L1.Messages.List)
- md.L1.Messages.List = append(md.L1.Messages.List, filedesc.Message{L2: new(filedesc.MessageL2)})
- md2 := &md.L1.Messages.List[n]
- md2.L0.FullName = md.FullName().Append(protoreflect.Name(strs.MapEntryName(string(fd.Name()))))
- md2.L0.ParentFile = md.L0.ParentFile
- md2.L0.Parent = md
- md2.L0.Index = n
- md2.L1.EditionFeatures = md.L1.EditionFeatures
-
- md2.L1.IsMapEntry = true
- md2.L2.Options = func() protoreflect.ProtoMessage {
- opts := descopts.Message.ProtoReflect().New()
- opts.Set(opts.Descriptor().Fields().ByName("map_entry"), protoreflect.ValueOfBool(true))
- return opts.Interface()
- }
-
- aberrantAppendField(md2, t.Key(), tagKey, "", "")
- aberrantAppendField(md2, t.Elem(), tagVal, "", "")
-
- fd.L1.Message = md2
- break
- }
- fd.L1.Message = aberrantLoadMessageDescReentrant(t, "")
- }
- }
-}
-
-type placeholderEnumValues struct {
- protoreflect.EnumValueDescriptors
-}
-
-func (placeholderEnumValues) ByNumber(n protoreflect.EnumNumber) protoreflect.EnumValueDescriptor {
- return filedesc.PlaceholderEnumValue(protoreflect.FullName(fmt.Sprintf("UNKNOWN_%d", n)))
-}
-
-// legacyMarshaler is the proto.Marshaler interface superseded by protoiface.Methoder.
-type legacyMarshaler interface {
- Marshal() ([]byte, error)
-}
-
-// legacyUnmarshaler is the proto.Unmarshaler interface superseded by protoiface.Methoder.
-type legacyUnmarshaler interface {
- Unmarshal([]byte) error
-}
-
-// legacyMerger is the proto.Merger interface superseded by protoiface.Methoder.
-type legacyMerger interface {
- Merge(protoiface.MessageV1)
-}
-
-var aberrantProtoMethods = &protoiface.Methods{
- Marshal: legacyMarshal,
- Unmarshal: legacyUnmarshal,
- Merge: legacyMerge,
-
- // We have no way to tell whether the type's Marshal method
- // supports deterministic serialization or not, but this
- // preserves the v1 implementation's behavior of always
- // calling Marshal methods when present.
- Flags: protoiface.SupportMarshalDeterministic,
-}
-
-func legacyMarshal(in protoiface.MarshalInput) (protoiface.MarshalOutput, error) {
- v := in.Message.(unwrapper).protoUnwrap()
- marshaler, ok := v.(legacyMarshaler)
- if !ok {
- return protoiface.MarshalOutput{}, errors.New("%T does not implement Marshal", v)
- }
- out, err := marshaler.Marshal()
- if in.Buf != nil {
- out = append(in.Buf, out...)
- }
- return protoiface.MarshalOutput{
- Buf: out,
- }, err
-}
-
-func legacyUnmarshal(in protoiface.UnmarshalInput) (protoiface.UnmarshalOutput, error) {
- v := in.Message.(unwrapper).protoUnwrap()
- unmarshaler, ok := v.(legacyUnmarshaler)
- if !ok {
- return protoiface.UnmarshalOutput{}, errors.New("%T does not implement Unmarshal", v)
- }
- return protoiface.UnmarshalOutput{}, unmarshaler.Unmarshal(in.Buf)
-}
-
-func legacyMerge(in protoiface.MergeInput) protoiface.MergeOutput {
- // Check whether this supports the legacy merger.
- dstv := in.Destination.(unwrapper).protoUnwrap()
- merger, ok := dstv.(legacyMerger)
- if ok {
- merger.Merge(Export{}.ProtoMessageV1Of(in.Source))
- return protoiface.MergeOutput{Flags: protoiface.MergeComplete}
- }
-
- // If legacy merger is unavailable, implement merge in terms of
- // a marshal and unmarshal operation.
- srcv := in.Source.(unwrapper).protoUnwrap()
- marshaler, ok := srcv.(legacyMarshaler)
- if !ok {
- return protoiface.MergeOutput{}
- }
- dstv = in.Destination.(unwrapper).protoUnwrap()
- unmarshaler, ok := dstv.(legacyUnmarshaler)
- if !ok {
- return protoiface.MergeOutput{}
- }
- if !in.Source.IsValid() {
- // Legacy Marshal methods may not function on nil messages.
- // Check for a typed nil source only after we confirm that
- // legacy Marshal/Unmarshal methods are present, for
- // consistency.
- return protoiface.MergeOutput{Flags: protoiface.MergeComplete}
- }
- b, err := marshaler.Marshal()
- if err != nil {
- return protoiface.MergeOutput{}
- }
- err = unmarshaler.Unmarshal(b)
- if err != nil {
- return protoiface.MergeOutput{}
- }
- return protoiface.MergeOutput{Flags: protoiface.MergeComplete}
-}
-
-// aberrantMessageType implements MessageType for all types other than pointer-to-struct.
-type aberrantMessageType struct {
- t reflect.Type
-}
-
-func (mt aberrantMessageType) New() protoreflect.Message {
- if mt.t.Kind() == reflect.Ptr {
- return aberrantMessage{reflect.New(mt.t.Elem())}
- }
- return aberrantMessage{reflect.Zero(mt.t)}
-}
-func (mt aberrantMessageType) Zero() protoreflect.Message {
- return aberrantMessage{reflect.Zero(mt.t)}
-}
-func (mt aberrantMessageType) GoType() reflect.Type {
- return mt.t
-}
-func (mt aberrantMessageType) Descriptor() protoreflect.MessageDescriptor {
- return LegacyLoadMessageDesc(mt.t)
-}
-
-// aberrantMessage implements Message for all types other than pointer-to-struct.
-//
-// When the underlying type implements legacyMarshaler or legacyUnmarshaler,
-// the aberrant Message can be marshaled or unmarshaled. Otherwise, there is
-// not much that can be done with values of this type.
-type aberrantMessage struct {
- v reflect.Value
-}
-
-// Reset implements the v1 proto.Message.Reset method.
-func (m aberrantMessage) Reset() {
- if mr, ok := m.v.Interface().(interface{ Reset() }); ok {
- mr.Reset()
- return
- }
- if m.v.Kind() == reflect.Ptr && !m.v.IsNil() {
- m.v.Elem().Set(reflect.Zero(m.v.Type().Elem()))
- }
-}
-
-func (m aberrantMessage) ProtoReflect() protoreflect.Message {
- return m
-}
-
-func (m aberrantMessage) Descriptor() protoreflect.MessageDescriptor {
- return LegacyLoadMessageDesc(m.v.Type())
-}
-func (m aberrantMessage) Type() protoreflect.MessageType {
- return aberrantMessageType{m.v.Type()}
-}
-func (m aberrantMessage) New() protoreflect.Message {
- if m.v.Type().Kind() == reflect.Ptr {
- return aberrantMessage{reflect.New(m.v.Type().Elem())}
- }
- return aberrantMessage{reflect.Zero(m.v.Type())}
-}
-func (m aberrantMessage) Interface() protoreflect.ProtoMessage {
- return m
-}
-func (m aberrantMessage) Range(f func(protoreflect.FieldDescriptor, protoreflect.Value) bool) {
- return
-}
-func (m aberrantMessage) Has(protoreflect.FieldDescriptor) bool {
- return false
-}
-func (m aberrantMessage) Clear(protoreflect.FieldDescriptor) {
- panic("invalid Message.Clear on " + string(m.Descriptor().FullName()))
-}
-func (m aberrantMessage) Get(fd protoreflect.FieldDescriptor) protoreflect.Value {
- if fd.Default().IsValid() {
- return fd.Default()
- }
- panic("invalid Message.Get on " + string(m.Descriptor().FullName()))
-}
-func (m aberrantMessage) Set(protoreflect.FieldDescriptor, protoreflect.Value) {
- panic("invalid Message.Set on " + string(m.Descriptor().FullName()))
-}
-func (m aberrantMessage) Mutable(protoreflect.FieldDescriptor) protoreflect.Value {
- panic("invalid Message.Mutable on " + string(m.Descriptor().FullName()))
-}
-func (m aberrantMessage) NewField(protoreflect.FieldDescriptor) protoreflect.Value {
- panic("invalid Message.NewField on " + string(m.Descriptor().FullName()))
-}
-func (m aberrantMessage) WhichOneof(protoreflect.OneofDescriptor) protoreflect.FieldDescriptor {
- panic("invalid Message.WhichOneof descriptor on " + string(m.Descriptor().FullName()))
-}
-func (m aberrantMessage) GetUnknown() protoreflect.RawFields {
- return nil
-}
-func (m aberrantMessage) SetUnknown(protoreflect.RawFields) {
- // SetUnknown discards its input on messages which don't support unknown field storage.
-}
-func (m aberrantMessage) IsValid() bool {
- if m.v.Kind() == reflect.Ptr {
- return !m.v.IsNil()
- }
- return false
-}
-func (m aberrantMessage) ProtoMethods() *protoiface.Methods {
- return aberrantProtoMethods
-}
-func (m aberrantMessage) protoUnwrap() any {
- return m.v.Interface()
-}
generated by cgit v1.2.3 (git 2.46.0) at 2025-07-13 20:24:32 +0000