vendor: Update github.com/gogo/protobuf

Also tweaks the proto definitions:

 - [packed=false] on the block_indexes field to retain compat with
   v0.14.16 and earlier.

 - Uses the vendored protobuf package in include paths.

And, "build.go setup" will install the vendored protoc-gen-gogofast.
This should ensure that a proto rebuild isn't so dependent on whatever
version of the compiler and package the developer has installed...

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3864

vendor/github.com/gogo/protobuf/protoc-gen-gogo/descriptor/Makefile

@@ -0,0 +1,36 @@
+# Go support for Protocol Buffers - Google's data interchange format
+#
+# Copyright 2010 The Go Authors.  All rights reserved.
+# https://github.com/golang/protobuf
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+regenerate:
+	go install github.com/gogo/protobuf/protoc-gen-gogo
+	go install github.com/gogo/protobuf/protoc-gen-gostring
+	protoc --gogo_out=. -I=../../protobuf/google/protobuf ../../protobuf/google/protobuf/descriptor.proto
+	protoc --gostring_out=. -I=../../protobuf/google/protobuf ../../protobuf/google/protobuf/descriptor.proto

vendor/github.com/gogo/protobuf/protoc-gen-gogo/descriptor/descriptor.go

@@ -0,0 +1,118 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2016 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Package descriptor provides functions for obtaining protocol buffer
+// descriptors for generated Go types.
+//
+// These functions cannot go in package proto because they depend on the
+// generated protobuf descriptor messages, which themselves depend on proto.
+package descriptor
+
+import (
+	"bytes"
+	"compress/gzip"
+	"fmt"
+	"io/ioutil"
+
+	"github.com/gogo/protobuf/proto"
+)
+
+// extractFile extracts a FileDescriptorProto from a gzip'd buffer.
+func extractFile(gz []byte) (*FileDescriptorProto, error) {
+	r, err := gzip.NewReader(bytes.NewReader(gz))
+	if err != nil {
+		return nil, fmt.Errorf("failed to open gzip reader: %v", err)
+	}
+	defer r.Close()
+
+	b, err := ioutil.ReadAll(r)
+	if err != nil {
+		return nil, fmt.Errorf("failed to uncompress descriptor: %v", err)
+	}
+
+	fd := new(FileDescriptorProto)
+	if err := proto.Unmarshal(b, fd); err != nil {
+		return nil, fmt.Errorf("malformed FileDescriptorProto: %v", err)
+	}
+
+	return fd, nil
+}
+
+// Message is a proto.Message with a method to return its descriptor.
+//
+// Message types generated by the protocol compiler always satisfy
+// the Message interface.
+type Message interface {
+	proto.Message
+	Descriptor() ([]byte, []int)
+}
+
+// ForMessage returns a FileDescriptorProto and a DescriptorProto from within it
+// describing the given message.
+func ForMessage(msg Message) (fd *FileDescriptorProto, md *DescriptorProto) {
+	gz, path := msg.Descriptor()
+	fd, err := extractFile(gz)
+	if err != nil {
+		panic(fmt.Sprintf("invalid FileDescriptorProto for %T: %v", msg, err))
+	}
+
+	md = fd.MessageType[path[0]]
+	for _, i := range path[1:] {
+		md = md.NestedType[i]
+	}
+	return fd, md
+}
+
+// Is this field a scalar numeric type?
+func (field *FieldDescriptorProto) IsScalar() bool {
+	if field.Type == nil {
+		return false
+	}
+	switch *field.Type {
+	case FieldDescriptorProto_TYPE_DOUBLE,
+		FieldDescriptorProto_TYPE_FLOAT,
+		FieldDescriptorProto_TYPE_INT64,
+		FieldDescriptorProto_TYPE_UINT64,
+		FieldDescriptorProto_TYPE_INT32,
+		FieldDescriptorProto_TYPE_FIXED64,
+		FieldDescriptorProto_TYPE_FIXED32,
+		FieldDescriptorProto_TYPE_BOOL,
+		FieldDescriptorProto_TYPE_UINT32,
+		FieldDescriptorProto_TYPE_ENUM,
+		FieldDescriptorProto_TYPE_SFIXED32,
+		FieldDescriptorProto_TYPE_SFIXED64,
+		FieldDescriptorProto_TYPE_SINT32,
+		FieldDescriptorProto_TYPE_SINT64:
+		return true
+	default:
+		return false
+	}
+}

vendor/github.com/gogo/protobuf/protoc-gen-gogo/descriptor/descriptor.pb.go

@@ -21,12 +21,14 @@ It has these top-level messages:
 	FileOptions
 	MessageOptions
 	FieldOptions
+	OneofOptions
 	EnumOptions
 	EnumValueOptions
 	ServiceOptions
 	MethodOptions
 	UninterpretedOption
 	SourceCodeInfo
+	GeneratedCodeInfo
 */
 package descriptor
 
@@ -41,7 +43,9 @@ var _ = math.Inf
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the proto package it is being compiled against.
-const _ = proto.GoGoProtoPackageIsVersion1
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.GoGoProtoPackageIsVersion2 // please upgrade the proto package
 
 type FieldDescriptorProto_Type int32
 
@@ -694,8 +698,9 @@ func (m *FieldDescriptorProto) GetOptions() *FieldOptions {
 
 // Describes a oneof.
 type OneofDescriptorProto struct {
-	Name             *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
+	Name             *string       `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Options          *OneofOptions `protobuf:"bytes,2,opt,name=options" json:"options,omitempty"`
+	XXX_unrecognized []byte        `json:"-"`
 }
 
 func (m *OneofDescriptorProto) Reset()                    { *m = OneofDescriptorProto{} }
@@ -710,6 +715,13 @@ func (m *OneofDescriptorProto) GetName() string {
 	return ""
 }
 
+func (m *OneofDescriptorProto) GetOptions() *OneofOptions {
+	if m != nil {
+		return m.Options
+	}
+	return nil
+}
+
 // Describes an enum type.
 type EnumDescriptorProto struct {
 	Name             *string                     `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
@@ -951,13 +963,10 @@ type FileOptions struct {
 	ObjcClassPrefix *string `protobuf:"bytes,36,opt,name=objc_class_prefix,json=objcClassPrefix" json:"objc_class_prefix,omitempty"`
 	// Namespace for generated classes; defaults to the package.
 	CsharpNamespace *string `protobuf:"bytes,37,opt,name=csharp_namespace,json=csharpNamespace" json:"csharp_namespace,omitempty"`
-	// Whether the nano proto compiler should generate in the deprecated non-nano
-	// suffixed package.
-	JavananoUseDeprecatedPackage *bool `protobuf:"varint,38,opt,name=javanano_use_deprecated_package,json=javananoUseDeprecatedPackage" json:"javanano_use_deprecated_package,omitempty"`
 	// The parser stores options it doesn't recognize here. See above.
-	UninterpretedOption []*UninterpretedOption    `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
-	XXX_extensions      map[int32]proto.Extension `json:"-"`
-	XXX_unrecognized    []byte                    `json:"-"`
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
 }
 
 func (m *FileOptions) Reset()                    { *m = FileOptions{} }
@@ -966,18 +975,12 @@ func (*FileOptions) ProtoMessage()               {}
 func (*FileOptions) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{9} }
 
 var extRange_FileOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*FileOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_FileOptions
 }
-func (m *FileOptions) ExtensionMap() map[int32]proto.Extension {
-	if m.XXX_extensions == nil {
-		m.XXX_extensions = make(map[int32]proto.Extension)
-	}
-	return m.XXX_extensions
-}
 
 const Default_FileOptions_JavaMultipleFiles bool = false
 const Default_FileOptions_JavaGenerateEqualsAndHash bool = false
@@ -1087,13 +1090,6 @@ func (m *FileOptions) GetCsharpNamespace() string {
 	return ""
 }
 
-func (m *FileOptions) GetJavananoUseDeprecatedPackage() bool {
-	if m != nil && m.JavananoUseDeprecatedPackage != nil {
-		return *m.JavananoUseDeprecatedPackage
-	}
-	return false
-}
-
 func (m *FileOptions) GetUninterpretedOption() []*UninterpretedOption {
 	if m != nil {
 		return m.UninterpretedOption
@@ -1153,9 +1149,9 @@ type MessageOptions struct {
 	// parser.
 	MapEntry *bool `protobuf:"varint,7,opt,name=map_entry,json=mapEntry" json:"map_entry,omitempty"`
 	// The parser stores options it doesn't recognize here. See above.
-	UninterpretedOption []*UninterpretedOption    `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
-	XXX_extensions      map[int32]proto.Extension `json:"-"`
-	XXX_unrecognized    []byte                    `json:"-"`
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
 }
 
 func (m *MessageOptions) Reset()                    { *m = MessageOptions{} }
@@ -1164,18 +1160,12 @@ func (*MessageOptions) ProtoMessage()               {}
 func (*MessageOptions) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{10} }
 
 var extRange_MessageOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*MessageOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_MessageOptions
 }
-func (m *MessageOptions) ExtensionMap() map[int32]proto.Extension {
-	if m.XXX_extensions == nil {
-		m.XXX_extensions = make(map[int32]proto.Extension)
-	}
-	return m.XXX_extensions
-}
 
 const Default_MessageOptions_MessageSetWireFormat bool = false
 const Default_MessageOptions_NoStandardDescriptorAccessor bool = false
@@ -1275,9 +1265,9 @@ type FieldOptions struct {
 	// For Google-internal migration only. Do not use.
 	Weak *bool `protobuf:"varint,10,opt,name=weak,def=0" json:"weak,omitempty"`
 	// The parser stores options it doesn't recognize here. See above.
-	UninterpretedOption []*UninterpretedOption    `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
-	XXX_extensions      map[int32]proto.Extension `json:"-"`
-	XXX_unrecognized    []byte                    `json:"-"`
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
 }
 
 func (m *FieldOptions) Reset()                    { *m = FieldOptions{} }
@@ -1286,18 +1276,12 @@ func (*FieldOptions) ProtoMessage()               {}
 func (*FieldOptions) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{11} }
 
 var extRange_FieldOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*FieldOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_FieldOptions
 }
-func (m *FieldOptions) ExtensionMap() map[int32]proto.Extension {
-	if m.XXX_extensions == nil {
-		m.XXX_extensions = make(map[int32]proto.Extension)
-	}
-	return m.XXX_extensions
-}
 
 const Default_FieldOptions_Ctype FieldOptions_CType = FieldOptions_STRING
 const Default_FieldOptions_Jstype FieldOptions_JSType = FieldOptions_JS_NORMAL
@@ -1354,6 +1338,33 @@ func (m *FieldOptions) GetUninterpretedOption() []*UninterpretedOption {
 	return nil
 }
 
+type OneofOptions struct {
+	// The parser stores options it doesn't recognize here. See above.
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+}
+
+func (m *OneofOptions) Reset()                    { *m = OneofOptions{} }
+func (m *OneofOptions) String() string            { return proto.CompactTextString(m) }
+func (*OneofOptions) ProtoMessage()               {}
+func (*OneofOptions) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{12} }
+
+var extRange_OneofOptions = []proto.ExtensionRange{
+	{Start: 1000, End: 536870911},
+}
+
+func (*OneofOptions) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_OneofOptions
+}
+
+func (m *OneofOptions) GetUninterpretedOption() []*UninterpretedOption {
+	if m != nil {
+		return m.UninterpretedOption
+	}
+	return nil
+}
+
 type EnumOptions struct {
 	// Set this option to true to allow mapping different tag names to the same
 	// value.
@@ -1364,29 +1375,23 @@ type EnumOptions struct {
 	// is a formalization for deprecating enums.
 	Deprecated *bool `protobuf:"varint,3,opt,name=deprecated,def=0" json:"deprecated,omitempty"`
 	// The parser stores options it doesn't recognize here. See above.
-	UninterpretedOption []*UninterpretedOption    `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
-	XXX_extensions      map[int32]proto.Extension `json:"-"`
-	XXX_unrecognized    []byte                    `json:"-"`
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
 }
 
 func (m *EnumOptions) Reset()                    { *m = EnumOptions{} }
 func (m *EnumOptions) String() string            { return proto.CompactTextString(m) }
 func (*EnumOptions) ProtoMessage()               {}
-func (*EnumOptions) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{12} }
+func (*EnumOptions) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{13} }
 
 var extRange_EnumOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*EnumOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_EnumOptions
 }
-func (m *EnumOptions) ExtensionMap() map[int32]proto.Extension {
-	if m.XXX_extensions == nil {
-		m.XXX_extensions = make(map[int32]proto.Extension)
-	}
-	return m.XXX_extensions
-}
 
 const Default_EnumOptions_Deprecated bool = false
 
@@ -1418,29 +1423,23 @@ type EnumValueOptions struct {
 	// this is a formalization for deprecating enum values.
 	Deprecated *bool `protobuf:"varint,1,opt,name=deprecated,def=0" json:"deprecated,omitempty"`
 	// The parser stores options it doesn't recognize here. See above.
-	UninterpretedOption []*UninterpretedOption    `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
-	XXX_extensions      map[int32]proto.Extension `json:"-"`
-	XXX_unrecognized    []byte                    `json:"-"`
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
 }
 
 func (m *EnumValueOptions) Reset()                    { *m = EnumValueOptions{} }
 func (m *EnumValueOptions) String() string            { return proto.CompactTextString(m) }
 func (*EnumValueOptions) ProtoMessage()               {}
-func (*EnumValueOptions) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{13} }
+func (*EnumValueOptions) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{14} }
 
 var extRange_EnumValueOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*EnumValueOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_EnumValueOptions
 }
-func (m *EnumValueOptions) ExtensionMap() map[int32]proto.Extension {
-	if m.XXX_extensions == nil {
-		m.XXX_extensions = make(map[int32]proto.Extension)
-	}
-	return m.XXX_extensions
-}
 
 const Default_EnumValueOptions_Deprecated bool = false
 
@@ -1465,29 +1464,23 @@ type ServiceOptions struct {
 	// this is a formalization for deprecating services.
 	Deprecated *bool `protobuf:"varint,33,opt,name=deprecated,def=0" json:"deprecated,omitempty"`
 	// The parser stores options it doesn't recognize here. See above.
-	UninterpretedOption []*UninterpretedOption    `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
-	XXX_extensions      map[int32]proto.Extension `json:"-"`
-	XXX_unrecognized    []byte                    `json:"-"`
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
 }
 
 func (m *ServiceOptions) Reset()                    { *m = ServiceOptions{} }
 func (m *ServiceOptions) String() string            { return proto.CompactTextString(m) }
 func (*ServiceOptions) ProtoMessage()               {}
-func (*ServiceOptions) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{14} }
+func (*ServiceOptions) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{15} }
 
 var extRange_ServiceOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*ServiceOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_ServiceOptions
 }
-func (m *ServiceOptions) ExtensionMap() map[int32]proto.Extension {
-	if m.XXX_extensions == nil {
-		m.XXX_extensions = make(map[int32]proto.Extension)
-	}
-	return m.XXX_extensions
-}
 
 const Default_ServiceOptions_Deprecated bool = false
 
@@ -1512,29 +1505,23 @@ type MethodOptions struct {
 	// this is a formalization for deprecating methods.
 	Deprecated *bool `protobuf:"varint,33,opt,name=deprecated,def=0" json:"deprecated,omitempty"`
 	// The parser stores options it doesn't recognize here. See above.
-	UninterpretedOption []*UninterpretedOption    `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
-	XXX_extensions      map[int32]proto.Extension `json:"-"`
-	XXX_unrecognized    []byte                    `json:"-"`
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
 }
 
 func (m *MethodOptions) Reset()                    { *m = MethodOptions{} }
 func (m *MethodOptions) String() string            { return proto.CompactTextString(m) }
 func (*MethodOptions) ProtoMessage()               {}
-func (*MethodOptions) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{15} }
+func (*MethodOptions) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{16} }
 
 var extRange_MethodOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*MethodOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_MethodOptions
 }
-func (m *MethodOptions) ExtensionMap() map[int32]proto.Extension {
-	if m.XXX_extensions == nil {
-		m.XXX_extensions = make(map[int32]proto.Extension)
-	}
-	return m.XXX_extensions
-}
 
 const Default_MethodOptions_Deprecated bool = false
 
@@ -1574,7 +1561,7 @@ type UninterpretedOption struct {
 func (m *UninterpretedOption) Reset()                    { *m = UninterpretedOption{} }
 func (m *UninterpretedOption) String() string            { return proto.CompactTextString(m) }
 func (*UninterpretedOption) ProtoMessage()               {}
-func (*UninterpretedOption) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{16} }
+func (*UninterpretedOption) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{17} }
 
 func (m *UninterpretedOption) GetName() []*UninterpretedOption_NamePart {
 	if m != nil {
@@ -1640,7 +1627,7 @@ func (m *UninterpretedOption_NamePart) Reset()         { *m = UninterpretedOptio
 func (m *UninterpretedOption_NamePart) String() string { return proto.CompactTextString(m) }
 func (*UninterpretedOption_NamePart) ProtoMessage()    {}
 func (*UninterpretedOption_NamePart) Descriptor() ([]byte, []int) {
-	return fileDescriptorDescriptor, []int{16, 0}
+	return fileDescriptorDescriptor, []int{17, 0}
 }
 
 func (m *UninterpretedOption_NamePart) GetNamePart() string {
@@ -1710,7 +1697,7 @@ type SourceCodeInfo struct {
 func (m *SourceCodeInfo) Reset()                    { *m = SourceCodeInfo{} }
 func (m *SourceCodeInfo) String() string            { return proto.CompactTextString(m) }
 func (*SourceCodeInfo) ProtoMessage()               {}
-func (*SourceCodeInfo) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{17} }
+func (*SourceCodeInfo) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{18} }
 
 func (m *SourceCodeInfo) GetLocation() []*SourceCodeInfo_Location {
 	if m != nil {
@@ -1807,7 +1794,7 @@ func (m *SourceCodeInfo_Location) Reset()         { *m = SourceCodeInfo_Location
 func (m *SourceCodeInfo_Location) String() string { return proto.CompactTextString(m) }
 func (*SourceCodeInfo_Location) ProtoMessage()    {}
 func (*SourceCodeInfo_Location) Descriptor() ([]byte, []int) {
-	return fileDescriptorDescriptor, []int{17, 0}
+	return fileDescriptorDescriptor, []int{18, 0}
 }
 
 func (m *SourceCodeInfo_Location) GetPath() []int32 {
@@ -1845,6 +1832,79 @@ func (m *SourceCodeInfo_Location) GetLeadingDetachedComments() []string {
 	return nil
 }
 
+// Describes the relationship between generated code and its original source
+// file. A GeneratedCodeInfo message is associated with only one generated
+// source file, but may contain references to different source .proto files.
+type GeneratedCodeInfo struct {
+	// An Annotation connects some span of text in generated code to an element
+	// of its generating .proto file.
+	Annotation       []*GeneratedCodeInfo_Annotation `protobuf:"bytes,1,rep,name=annotation" json:"annotation,omitempty"`
+	XXX_unrecognized []byte                          `json:"-"`
+}
+
+func (m *GeneratedCodeInfo) Reset()                    { *m = GeneratedCodeInfo{} }
+func (m *GeneratedCodeInfo) String() string            { return proto.CompactTextString(m) }
+func (*GeneratedCodeInfo) ProtoMessage()               {}
+func (*GeneratedCodeInfo) Descriptor() ([]byte, []int) { return fileDescriptorDescriptor, []int{19} }
+
+func (m *GeneratedCodeInfo) GetAnnotation() []*GeneratedCodeInfo_Annotation {
+	if m != nil {
+		return m.Annotation
+	}
+	return nil
+}
+
+type GeneratedCodeInfo_Annotation struct {
+	// Identifies the element in the original source .proto file. This field
+	// is formatted the same as SourceCodeInfo.Location.path.
+	Path []int32 `protobuf:"varint,1,rep,packed,name=path" json:"path,omitempty"`
+	// Identifies the filesystem path to the original source .proto.
+	SourceFile *string `protobuf:"bytes,2,opt,name=source_file,json=sourceFile" json:"source_file,omitempty"`
+	// Identifies the starting offset in bytes in the generated code
+	// that relates to the identified object.
+	Begin *int32 `protobuf:"varint,3,opt,name=begin" json:"begin,omitempty"`
+	// Identifies the ending offset in bytes in the generated code that
+	// relates to the identified offset. The end offset should be one past
+	// the last relevant byte (so the length of the text = end - begin).
+	End              *int32 `protobuf:"varint,4,opt,name=end" json:"end,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *GeneratedCodeInfo_Annotation) Reset()         { *m = GeneratedCodeInfo_Annotation{} }
+func (m *GeneratedCodeInfo_Annotation) String() string { return proto.CompactTextString(m) }
+func (*GeneratedCodeInfo_Annotation) ProtoMessage()    {}
+func (*GeneratedCodeInfo_Annotation) Descriptor() ([]byte, []int) {
+	return fileDescriptorDescriptor, []int{19, 0}
+}
+
+func (m *GeneratedCodeInfo_Annotation) GetPath() []int32 {
+	if m != nil {
+		return m.Path
+	}
+	return nil
+}
+
+func (m *GeneratedCodeInfo_Annotation) GetSourceFile() string {
+	if m != nil && m.SourceFile != nil {
+		return *m.SourceFile
+	}
+	return ""
+}
+
+func (m *GeneratedCodeInfo_Annotation) GetBegin() int32 {
+	if m != nil && m.Begin != nil {
+		return *m.Begin
+	}
+	return 0
+}
+
+func (m *GeneratedCodeInfo_Annotation) GetEnd() int32 {
+	if m != nil && m.End != nil {
+		return *m.End
+	}
+	return 0
+}
+
 func init() {
 	proto.RegisterType((*FileDescriptorSet)(nil), "google.protobuf.FileDescriptorSet")
 	proto.RegisterType((*FileDescriptorProto)(nil), "google.protobuf.FileDescriptorProto")
@@ -1860,6 +1920,7 @@ func init() {
 	proto.RegisterType((*FileOptions)(nil), "google.protobuf.FileOptions")
 	proto.RegisterType((*MessageOptions)(nil), "google.protobuf.MessageOptions")
 	proto.RegisterType((*FieldOptions)(nil), "google.protobuf.FieldOptions")
+	proto.RegisterType((*OneofOptions)(nil), "google.protobuf.OneofOptions")
 	proto.RegisterType((*EnumOptions)(nil), "google.protobuf.EnumOptions")
 	proto.RegisterType((*EnumValueOptions)(nil), "google.protobuf.EnumValueOptions")
 	proto.RegisterType((*ServiceOptions)(nil), "google.protobuf.ServiceOptions")
@@ -1868,6 +1929,8 @@ func init() {
 	proto.RegisterType((*UninterpretedOption_NamePart)(nil), "google.protobuf.UninterpretedOption.NamePart")
 	proto.RegisterType((*SourceCodeInfo)(nil), "google.protobuf.SourceCodeInfo")
 	proto.RegisterType((*SourceCodeInfo_Location)(nil), "google.protobuf.SourceCodeInfo.Location")
+	proto.RegisterType((*GeneratedCodeInfo)(nil), "google.protobuf.GeneratedCodeInfo")
+	proto.RegisterType((*GeneratedCodeInfo_Annotation)(nil), "google.protobuf.GeneratedCodeInfo.Annotation")
 	proto.RegisterEnum("google.protobuf.FieldDescriptorProto_Type", FieldDescriptorProto_Type_name, FieldDescriptorProto_Type_value)
 	proto.RegisterEnum("google.protobuf.FieldDescriptorProto_Label", FieldDescriptorProto_Label_name, FieldDescriptorProto_Label_value)
 	proto.RegisterEnum("google.protobuf.FileOptions_OptimizeMode", FileOptions_OptimizeMode_name, FileOptions_OptimizeMode_value)
@@ -1875,143 +1938,151 @@ func init() {
 	proto.RegisterEnum("google.protobuf.FieldOptions_JSType", FieldOptions_JSType_name, FieldOptions_JSType_value)
 }
 
+func init() { proto.RegisterFile("descriptor.proto", fileDescriptorDescriptor) }
+
 var fileDescriptorDescriptor = []byte{
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+	0xdd, 0xb2, 0x4b, 0xfc, 0x30, 0x9a, 0x7e, 0x6f, 0x01, 0xb2, 0x2d, 0xca, 0x42, 0xbb, 0x6f, 0x53,
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+	0x87, 0xa6, 0xbe, 0x3c, 0x83, 0x4f, 0x94, 0xcf, 0x60, 0x3c, 0x9d, 0xfd, 0x49, 0x51, 0xbe, 0xc8,
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+	0x00,
 }

vendor/github.com/gogo/protobuf/protoc-gen-gogo/descriptor/descriptor_gostring.gen.go

@@ -1,12 +1,50 @@
+// Code generated by protoc-gen-gogo.
+// source: descriptor.proto
+// DO NOT EDIT!
+
+/*
+Package descriptor is a generated protocol buffer package.
+
+It is generated from these files:
+	descriptor.proto
+
+It has these top-level messages:
+	FileDescriptorSet
+	FileDescriptorProto
+	DescriptorProto
+	FieldDescriptorProto
+	OneofDescriptorProto
+	EnumDescriptorProto
+	EnumValueDescriptorProto
+	ServiceDescriptorProto
+	MethodDescriptorProto
+	FileOptions
+	MessageOptions
+	FieldOptions
+	OneofOptions
+	EnumOptions
+	EnumValueOptions
+	ServiceOptions
+	MethodOptions
+	UninterpretedOption
+	SourceCodeInfo
+	GeneratedCodeInfo
+*/
 package descriptor
 
 import fmt "fmt"
-
 import strings "strings"
 import github_com_gogo_protobuf_proto "github.com/gogo/protobuf/proto"
 import sort "sort"
 import strconv "strconv"
 import reflect "reflect"
+import proto "github.com/gogo/protobuf/proto"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
 
 func (this *FileDescriptorSet) GoString() string {
 	if this == nil {
@@ -195,11 +233,14 @@ func (this *OneofDescriptorProto) GoString() string {
 	if this == nil {
 		return "nil"
 	}
-	s := make([]string, 0, 5)
+	s := make([]string, 0, 6)
 	s = append(s, "&descriptor.OneofDescriptorProto{")
 	if this.Name != nil {
 		s = append(s, "Name: "+valueToGoStringDescriptor(this.Name, "string")+",\n")
 	}
+	if this.Options != nil {
+		s = append(s, "Options: "+fmt.Sprintf("%#v", this.Options)+",\n")
+	}
 	if this.XXX_unrecognized != nil {
 		s = append(s, "XXX_unrecognized:"+fmt.Sprintf("%#v", this.XXX_unrecognized)+",\n")
 	}
@@ -303,7 +344,7 @@ func (this *FileOptions) GoString() string {
 	if this == nil {
 		return "nil"
 	}
-	s := make([]string, 0, 20)
+	s := make([]string, 0, 19)
 	s = append(s, "&descriptor.FileOptions{")
 	if this.JavaPackage != nil {
 		s = append(s, "JavaPackage: "+valueToGoStringDescriptor(this.JavaPackage, "string")+",\n")
@@ -347,15 +388,10 @@ func (this *FileOptions) GoString() string {
 	if this.CsharpNamespace != nil {
 		s = append(s, "CsharpNamespace: "+valueToGoStringDescriptor(this.CsharpNamespace, "string")+",\n")
 	}
-	if this.JavananoUseDeprecatedPackage != nil {
-		s = append(s, "JavananoUseDeprecatedPackage: "+valueToGoStringDescriptor(this.JavananoUseDeprecatedPackage, "bool")+",\n")
-	}
 	if this.UninterpretedOption != nil {
 		s = append(s, "UninterpretedOption: "+fmt.Sprintf("%#v", this.UninterpretedOption)+",\n")
 	}
-	if this.XXX_extensions != nil {
-		s = append(s, "XXX_extensions: "+extensionToGoStringDescriptor(this.XXX_extensions)+",\n")
-	}
+	s = append(s, "XXX_InternalExtensions: "+extensionToGoStringDescriptor(this)+",\n")
 	if this.XXX_unrecognized != nil {
 		s = append(s, "XXX_unrecognized:"+fmt.Sprintf("%#v", this.XXX_unrecognized)+",\n")
 	}
@@ -383,9 +419,7 @@ func (this *MessageOptions) GoString() string {
 	if this.UninterpretedOption != nil {
 		s = append(s, "UninterpretedOption: "+fmt.Sprintf("%#v", this.UninterpretedOption)+",\n")
 	}
-	if this.XXX_extensions != nil {
-		s = append(s, "XXX_extensions: "+extensionToGoStringDescriptor(this.XXX_extensions)+",\n")
-	}
+	s = append(s, "XXX_InternalExtensions: "+extensionToGoStringDescriptor(this)+",\n")
 	if this.XXX_unrecognized != nil {
 		s = append(s, "XXX_unrecognized:"+fmt.Sprintf("%#v", this.XXX_unrecognized)+",\n")
 	}
@@ -419,9 +453,23 @@ func (this *FieldOptions) GoString() string {
 	if this.UninterpretedOption != nil {
 		s = append(s, "UninterpretedOption: "+fmt.Sprintf("%#v", this.UninterpretedOption)+",\n")
 	}
-	if this.XXX_extensions != nil {
-		s = append(s, "XXX_extensions: "+extensionToGoStringDescriptor(this.XXX_extensions)+",\n")
+	s = append(s, "XXX_InternalExtensions: "+extensionToGoStringDescriptor(this)+",\n")
+	if this.XXX_unrecognized != nil {
+		s = append(s, "XXX_unrecognized:"+fmt.Sprintf("%#v", this.XXX_unrecognized)+",\n")
 	}
+	s = append(s, "}")
+	return strings.Join(s, "")
+}
+func (this *OneofOptions) GoString() string {
+	if this == nil {
+		return "nil"
+	}
+	s := make([]string, 0, 5)
+	s = append(s, "&descriptor.OneofOptions{")
+	if this.UninterpretedOption != nil {
+		s = append(s, "UninterpretedOption: "+fmt.Sprintf("%#v", this.UninterpretedOption)+",\n")
+	}
+	s = append(s, "XXX_InternalExtensions: "+extensionToGoStringDescriptor(this)+",\n")
 	if this.XXX_unrecognized != nil {
 		s = append(s, "XXX_unrecognized:"+fmt.Sprintf("%#v", this.XXX_unrecognized)+",\n")
 	}
@@ -443,9 +491,7 @@ func (this *EnumOptions) GoString() string {
 	if this.UninterpretedOption != nil {
 		s = append(s, "UninterpretedOption: "+fmt.Sprintf("%#v", this.UninterpretedOption)+",\n")
 	}
-	if this.XXX_extensions != nil {
-		s = append(s, "XXX_extensions: "+extensionToGoStringDescriptor(this.XXX_extensions)+",\n")
-	}
+	s = append(s, "XXX_InternalExtensions: "+extensionToGoStringDescriptor(this)+",\n")
 	if this.XXX_unrecognized != nil {
 		s = append(s, "XXX_unrecognized:"+fmt.Sprintf("%#v", this.XXX_unrecognized)+",\n")
 	}
@@ -464,9 +510,7 @@ func (this *EnumValueOptions) GoString() string {
 	if this.UninterpretedOption != nil {
 		s = append(s, "UninterpretedOption: "+fmt.Sprintf("%#v", this.UninterpretedOption)+",\n")
 	}
-	if this.XXX_extensions != nil {
-		s = append(s, "XXX_extensions: "+extensionToGoStringDescriptor(this.XXX_extensions)+",\n")
-	}
+	s = append(s, "XXX_InternalExtensions: "+extensionToGoStringDescriptor(this)+",\n")
 	if this.XXX_unrecognized != nil {
 		s = append(s, "XXX_unrecognized:"+fmt.Sprintf("%#v", this.XXX_unrecognized)+",\n")
 	}
@@ -485,9 +529,7 @@ func (this *ServiceOptions) GoString() string {
 	if this.UninterpretedOption != nil {
 		s = append(s, "UninterpretedOption: "+fmt.Sprintf("%#v", this.UninterpretedOption)+",\n")
 	}
-	if this.XXX_extensions != nil {
-		s = append(s, "XXX_extensions: "+extensionToGoStringDescriptor(this.XXX_extensions)+",\n")
-	}
+	s = append(s, "XXX_InternalExtensions: "+extensionToGoStringDescriptor(this)+",\n")
 	if this.XXX_unrecognized != nil {
 		s = append(s, "XXX_unrecognized:"+fmt.Sprintf("%#v", this.XXX_unrecognized)+",\n")
 	}
@@ -506,9 +548,7 @@ func (this *MethodOptions) GoString() string {
 	if this.UninterpretedOption != nil {
 		s = append(s, "UninterpretedOption: "+fmt.Sprintf("%#v", this.UninterpretedOption)+",\n")
 	}
-	if this.XXX_extensions != nil {
-		s = append(s, "XXX_extensions: "+extensionToGoStringDescriptor(this.XXX_extensions)+",\n")
-	}
+	s = append(s, "XXX_InternalExtensions: "+extensionToGoStringDescriptor(this)+",\n")
 	if this.XXX_unrecognized != nil {
 		s = append(s, "XXX_unrecognized:"+fmt.Sprintf("%#v", this.XXX_unrecognized)+",\n")
 	}
@@ -608,6 +648,45 @@ func (this *SourceCodeInfo_Location) GoString() string {
 	s = append(s, "}")
 	return strings.Join(s, "")
 }
+func (this *GeneratedCodeInfo) GoString() string {
+	if this == nil {
+		return "nil"
+	}
+	s := make([]string, 0, 5)
+	s = append(s, "&descriptor.GeneratedCodeInfo{")
+	if this.Annotation != nil {
+		s = append(s, "Annotation: "+fmt.Sprintf("%#v", this.Annotation)+",\n")
+	}
+	if this.XXX_unrecognized != nil {
+		s = append(s, "XXX_unrecognized:"+fmt.Sprintf("%#v", this.XXX_unrecognized)+",\n")
+	}
+	s = append(s, "}")
+	return strings.Join(s, "")
+}
+func (this *GeneratedCodeInfo_Annotation) GoString() string {
+	if this == nil {
+		return "nil"
+	}
+	s := make([]string, 0, 8)
+	s = append(s, "&descriptor.GeneratedCodeInfo_Annotation{")
+	if this.Path != nil {
+		s = append(s, "Path: "+fmt.Sprintf("%#v", this.Path)+",\n")
+	}
+	if this.SourceFile != nil {
+		s = append(s, "SourceFile: "+valueToGoStringDescriptor(this.SourceFile, "string")+",\n")
+	}
+	if this.Begin != nil {
+		s = append(s, "Begin: "+valueToGoStringDescriptor(this.Begin, "int32")+",\n")
+	}
+	if this.End != nil {
+		s = append(s, "End: "+valueToGoStringDescriptor(this.End, "int32")+",\n")
+	}
+	if this.XXX_unrecognized != nil {
+		s = append(s, "XXX_unrecognized:"+fmt.Sprintf("%#v", this.XXX_unrecognized)+",\n")
+	}
+	s = append(s, "}")
+	return strings.Join(s, "")
+}
 func valueToGoStringDescriptor(v interface{}, typ string) string {
 	rv := reflect.ValueOf(v)
 	if rv.IsNil() {
@@ -616,11 +695,12 @@ func valueToGoStringDescriptor(v interface{}, typ string) string {
 	pv := reflect.Indirect(rv).Interface()
 	return fmt.Sprintf("func(v %v) *%v { return &v } ( %#v )", typ, typ, pv)
 }
-func extensionToGoStringDescriptor(e map[int32]github_com_gogo_protobuf_proto.Extension) string {
+func extensionToGoStringDescriptor(m github_com_gogo_protobuf_proto.Message) string {
+	e := github_com_gogo_protobuf_proto.GetUnsafeExtensionsMap(m)
 	if e == nil {
 		return "nil"
 	}
-	s := "map[int32]proto.Extension{"
+	s := "proto.NewUnsafeXXX_InternalExtensions(map[int32]proto.Extension{"
 	keys := make([]int, 0, len(e))
 	for k := range e {
 		keys = append(keys, int(k))
@@ -630,6 +710,6 @@ func extensionToGoStringDescriptor(e map[int32]github_com_gogo_protobuf_proto.Ex
 	for _, k := range keys {
 		ss = append(ss, strconv.Itoa(k)+": "+e[int32(k)].GoString())
 	}
-	s += strings.Join(ss, ",") + "}"
+	s += strings.Join(ss, ",") + "})"
 	return s
 }

vendor/github.com/gogo/protobuf/protoc-gen-gogo/descriptor/descriptor_test.go

@@ -0,0 +1,31 @@
+package descriptor_test
+
+import (
+	"fmt"
+	"testing"
+
+	tpb "github.com/gogo/protobuf/proto/testdata"
+	"github.com/gogo/protobuf/protoc-gen-gogo/descriptor"
+)
+
+func TestMessage(t *testing.T) {
+	var msg *descriptor.DescriptorProto
+	fd, md := descriptor.ForMessage(msg)
+	if pkg, want := fd.GetPackage(), "google.protobuf"; pkg != want {
+		t.Errorf("descriptor.ForMessage(%T).GetPackage() = %q; want %q", msg, pkg, want)
+	}
+	if name, want := md.GetName(), "DescriptorProto"; name != want {
+		t.Fatalf("descriptor.ForMessage(%T).GetName() = %q; want %q", msg, name, want)
+	}
+}
+
+func Example_Options() {
+	var msg *tpb.MyMessageSet
+	_, md := descriptor.ForMessage(msg)
+	if md.GetOptions().GetMessageSetWireFormat() {
+		fmt.Printf("%v uses option message_set_wire_format.\n", md.GetName())
+	}
+
+	// Output:
+	// MyMessageSet uses option message_set_wire_format.
+}

vendor/github.com/gogo/protobuf/protoc-gen-gogo/descriptor/helper.go

@@ -1,4 +1,6 @@
-// Copyright (c) 2013, Vastech SA (PTY) LTD. All rights reserved.
+// Protocol Buffers for Go with Gadgets
+//
+// Copyright (c) 2013, The GoGo Authors. All rights reserved.
 // http://github.com/gogo/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -97,6 +99,17 @@ func (field *FieldDescriptorProto) GetKeyUint64() (x uint64) {
 	return x
 }
 
+func (field *FieldDescriptorProto) GetKey3Uint64() (x uint64) {
+	packed := field.IsPacked3()
+	wireType := field.WireType()
+	fieldNumber := field.GetNumber()
+	if packed {
+		wireType = 2
+	}
+	x = uint64(uint32(fieldNumber)<<3 | uint32(wireType))
+	return x
+}
+
 func (field *FieldDescriptorProto) GetKey() []byte {
 	x := field.GetKeyUint64()
 	i := 0
@@ -109,6 +122,18 @@ func (field *FieldDescriptorProto) GetKey() []byte {
 	return keybuf
 }
 
+func (field *FieldDescriptorProto) GetKey3() []byte {
+	x := field.GetKey3Uint64()
+	i := 0
+	keybuf := make([]byte, 0)
+	for i = 0; x > 127; i++ {
+		keybuf = append(keybuf, 0x80|uint8(x&0x7F))
+		x >>= 7
+	}
+	keybuf = append(keybuf, uint8(x))
+	return keybuf
+}
+
 func (desc *FileDescriptorSet) GetField(packageName, messageName, fieldName string) *FieldDescriptorProto {
 	msg := desc.GetMessage(packageName, messageName)
 	if msg == nil {
@@ -350,6 +375,16 @@ func (f *FieldDescriptorProto) IsPacked() bool {
 	return f.Options != nil && f.GetOptions().GetPacked()
 }
 
+func (f *FieldDescriptorProto) IsPacked3() bool {
+	if f.IsRepeated() && f.IsScalar() {
+		if f.Options == nil || f.GetOptions().Packed == nil {
+			return true
+		}
+		return f.Options != nil && f.GetOptions().GetPacked()
+	}
+	return false
+}
+
 func (m *DescriptorProto) HasExtension() bool {
 	return len(m.ExtensionRange) > 0
 }