[VOL-4291] Rw-core updates for gRPC migration
Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/github.com/golang/protobuf/descriptor/descriptor.go b/vendor/github.com/golang/protobuf/descriptor/descriptor.go
new file mode 100644
index 0000000..ffde8a6
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/descriptor/descriptor.go
@@ -0,0 +1,180 @@
+// Copyright 2016 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 descriptor provides functions for obtaining the protocol buffer
+// descriptors of generated Go types.
+//
+// Deprecated: See the "google.golang.org/protobuf/reflect/protoreflect" package
+// for how to obtain an EnumDescriptor or MessageDescriptor in order to
+// programatically interact with the protobuf type system.
+package descriptor
+
+import (
+ "bytes"
+ "compress/gzip"
+ "io/ioutil"
+ "sync"
+
+ "github.com/golang/protobuf/proto"
+ "google.golang.org/protobuf/reflect/protodesc"
+ "google.golang.org/protobuf/reflect/protoreflect"
+ "google.golang.org/protobuf/runtime/protoimpl"
+
+ descriptorpb "github.com/golang/protobuf/protoc-gen-go/descriptor"
+)
+
+// Message is proto.Message with a method to return its descriptor.
+//
+// Deprecated: The Descriptor method may not be generated by future
+// versions of protoc-gen-go, meaning that this interface may not
+// be implemented by many concrete message types.
+type Message interface {
+ proto.Message
+ Descriptor() ([]byte, []int)
+}
+
+// ForMessage returns the file descriptor proto containing
+// the message and the message descriptor proto for the message itself.
+// The returned proto messages must not be mutated.
+//
+// Deprecated: Not all concrete message types satisfy the Message interface.
+// Use MessageDescriptorProto instead. If possible, the calling code should
+// be rewritten to use protobuf reflection instead.
+// See package "google.golang.org/protobuf/reflect/protoreflect" for details.
+func ForMessage(m Message) (*descriptorpb.FileDescriptorProto, *descriptorpb.DescriptorProto) {
+ return MessageDescriptorProto(m)
+}
+
+type rawDesc struct {
+ fileDesc []byte
+ indexes []int
+}
+
+var rawDescCache sync.Map // map[protoreflect.Descriptor]*rawDesc
+
+func deriveRawDescriptor(d protoreflect.Descriptor) ([]byte, []int) {
+ // Fast-path: check whether raw descriptors are already cached.
+ origDesc := d
+ if v, ok := rawDescCache.Load(origDesc); ok {
+ return v.(*rawDesc).fileDesc, v.(*rawDesc).indexes
+ }
+
+ // Slow-path: derive the raw descriptor from the v2 descriptor.
+
+ // Start with the leaf (a given enum or message declaration) and
+ // ascend upwards until we hit the parent file descriptor.
+ var idxs []int
+ for {
+ idxs = append(idxs, d.Index())
+ d = d.Parent()
+ if d == nil {
+ // TODO: We could construct a FileDescriptor stub for standalone
+ // descriptors to satisfy the API.
+ return nil, nil
+ }
+ if _, ok := d.(protoreflect.FileDescriptor); ok {
+ break
+ }
+ }
+
+ // Obtain the raw file descriptor.
+ fd := d.(protoreflect.FileDescriptor)
+ b, _ := proto.Marshal(protodesc.ToFileDescriptorProto(fd))
+ file := protoimpl.X.CompressGZIP(b)
+
+ // Reverse the indexes, since we populated it in reverse.
+ for i, j := 0, len(idxs)-1; i < j; i, j = i+1, j-1 {
+ idxs[i], idxs[j] = idxs[j], idxs[i]
+ }
+
+ if v, ok := rawDescCache.LoadOrStore(origDesc, &rawDesc{file, idxs}); ok {
+ return v.(*rawDesc).fileDesc, v.(*rawDesc).indexes
+ }
+ return file, idxs
+}
+
+// EnumRawDescriptor returns the GZIP'd raw file descriptor representing
+// the enum and the index path to reach the enum declaration.
+// The returned slices must not be mutated.
+func EnumRawDescriptor(e proto.GeneratedEnum) ([]byte, []int) {
+ if ev, ok := e.(interface{ EnumDescriptor() ([]byte, []int) }); ok {
+ return ev.EnumDescriptor()
+ }
+ ed := protoimpl.X.EnumTypeOf(e)
+ return deriveRawDescriptor(ed.Descriptor())
+}
+
+// MessageRawDescriptor returns the GZIP'd raw file descriptor representing
+// the message and the index path to reach the message declaration.
+// The returned slices must not be mutated.
+func MessageRawDescriptor(m proto.GeneratedMessage) ([]byte, []int) {
+ if mv, ok := m.(interface{ Descriptor() ([]byte, []int) }); ok {
+ return mv.Descriptor()
+ }
+ md := protoimpl.X.MessageTypeOf(m)
+ return deriveRawDescriptor(md.Descriptor())
+}
+
+var fileDescCache sync.Map // map[*byte]*descriptorpb.FileDescriptorProto
+
+func deriveFileDescriptor(rawDesc []byte) *descriptorpb.FileDescriptorProto {
+ // Fast-path: check whether descriptor protos are already cached.
+ if v, ok := fileDescCache.Load(&rawDesc[0]); ok {
+ return v.(*descriptorpb.FileDescriptorProto)
+ }
+
+ // Slow-path: derive the descriptor proto from the GZIP'd message.
+ zr, err := gzip.NewReader(bytes.NewReader(rawDesc))
+ if err != nil {
+ panic(err)
+ }
+ b, err := ioutil.ReadAll(zr)
+ if err != nil {
+ panic(err)
+ }
+ fd := new(descriptorpb.FileDescriptorProto)
+ if err := proto.Unmarshal(b, fd); err != nil {
+ panic(err)
+ }
+ if v, ok := fileDescCache.LoadOrStore(&rawDesc[0], fd); ok {
+ return v.(*descriptorpb.FileDescriptorProto)
+ }
+ return fd
+}
+
+// EnumDescriptorProto returns the file descriptor proto representing
+// the enum and the enum descriptor proto for the enum itself.
+// The returned proto messages must not be mutated.
+func EnumDescriptorProto(e proto.GeneratedEnum) (*descriptorpb.FileDescriptorProto, *descriptorpb.EnumDescriptorProto) {
+ rawDesc, idxs := EnumRawDescriptor(e)
+ if rawDesc == nil || idxs == nil {
+ return nil, nil
+ }
+ fd := deriveFileDescriptor(rawDesc)
+ if len(idxs) == 1 {
+ return fd, fd.EnumType[idxs[0]]
+ }
+ md := fd.MessageType[idxs[0]]
+ for _, i := range idxs[1 : len(idxs)-1] {
+ md = md.NestedType[i]
+ }
+ ed := md.EnumType[idxs[len(idxs)-1]]
+ return fd, ed
+}
+
+// MessageDescriptorProto returns the file descriptor proto representing
+// the message and the message descriptor proto for the message itself.
+// The returned proto messages must not be mutated.
+func MessageDescriptorProto(m proto.GeneratedMessage) (*descriptorpb.FileDescriptorProto, *descriptorpb.DescriptorProto) {
+ rawDesc, idxs := MessageRawDescriptor(m)
+ if rawDesc == nil || idxs == nil {
+ return nil, nil
+ }
+ fd := deriveFileDescriptor(rawDesc)
+ md := fd.MessageType[idxs[0]]
+ for _, i := range idxs[1:] {
+ md = md.NestedType[i]
+ }
+ return fd, md
+}