Update vendored dependencies
This commit is contained in:
Christian Huffman
230
vendor/github.com/golang/protobuf/descriptor/descriptor.go
generated
vendored
230
vendor/github.com/golang/protobuf/descriptor/descriptor.go
generated
vendored
@@ -1,92 +1,184 @@
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// Go support for Protocol Buffers - Google's data interchange format
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//
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// Copyright 2016 The Go Authors. All rights reserved.
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// https://github.com/golang/protobuf
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package descriptor provides functions for obtaining protocol buffer
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// descriptors for generated Go types.
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// Package descriptor provides functions for obtaining the protocol buffer
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// descriptors of generated Go types.
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//
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// These functions cannot go in package proto because they depend on the
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// generated protobuf descriptor messages, which themselves depend on proto.
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// Deprecated: See the "google.golang.org/protobuf/reflect/protoreflect" package
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// for how to obtain an EnumDescriptor or MessageDescriptor in order to
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// programatically interact with the protobuf type system.
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package descriptor
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import (
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"bytes"
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"compress/gzip"
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"fmt"
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"io/ioutil"
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"sync"
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"github.com/golang/protobuf/proto"
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protobuf "github.com/golang/protobuf/protoc-gen-go/descriptor"
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"google.golang.org/protobuf/reflect/protodesc"
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"google.golang.org/protobuf/reflect/protoreflect"
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"google.golang.org/protobuf/runtime/protoimpl"
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descriptorpb "github.com/golang/protobuf/protoc-gen-go/descriptor"
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)
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// extractFile extracts a FileDescriptorProto from a gzip'd buffer.
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func extractFile(gz []byte) (*protobuf.FileDescriptorProto, error) {
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r, err := gzip.NewReader(bytes.NewReader(gz))
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if err != nil {
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return nil, fmt.Errorf("failed to open gzip reader: %v", err)
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}
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defer r.Close()
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b, err := ioutil.ReadAll(r)
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if err != nil {
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return nil, fmt.Errorf("failed to uncompress descriptor: %v", err)
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}
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fd := new(protobuf.FileDescriptorProto)
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if err := proto.Unmarshal(b, fd); err != nil {
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return nil, fmt.Errorf("malformed FileDescriptorProto: %v", err)
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}
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return fd, nil
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}
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// Message is a proto.Message with a method to return its descriptor.
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// Message is proto.Message with a method to return its descriptor.
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//
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// Message types generated by the protocol compiler always satisfy
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// the Message interface.
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// Deprecated: The Descriptor method may not be generated by future
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// versions of protoc-gen-go, meaning that this interface may not
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// be implemented by many concrete message types.
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type Message interface {
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proto.Message
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Descriptor() ([]byte, []int)
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}
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// ForMessage returns a FileDescriptorProto and a DescriptorProto from within it
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// describing the given message.
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func ForMessage(msg Message) (fd *protobuf.FileDescriptorProto, md *protobuf.DescriptorProto) {
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gz, path := msg.Descriptor()
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fd, err := extractFile(gz)
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if err != nil {
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panic(fmt.Sprintf("invalid FileDescriptorProto for %T: %v", msg, err))
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// ForMessage returns the file descriptor proto containing
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// the message and the message descriptor proto for the message itself.
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// The returned proto messages must not be mutated.
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//
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// Deprecated: Not all concrete message types satisfy the Message interface.
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// Use MessageDescriptorProto instead. If possible, the calling code should
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// be rewritten to use protobuf reflection instead.
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// See package "google.golang.org/protobuf/reflect/protoreflect" for details.
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func ForMessage(m Message) (*descriptorpb.FileDescriptorProto, *descriptorpb.DescriptorProto) {
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return MessageDescriptorProto(m)
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}
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type rawDesc struct {
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fileDesc []byte
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indexes []int
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}
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var rawDescCache sync.Map // map[protoreflect.Descriptor]*rawDesc
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func deriveRawDescriptor(d protoreflect.Descriptor) ([]byte, []int) {
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// Fast-path: check whether raw descriptors are already cached.
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origDesc := d
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if v, ok := rawDescCache.Load(origDesc); ok {
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return v.(*rawDesc).fileDesc, v.(*rawDesc).indexes
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}
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md = fd.MessageType[path[0]]
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for _, i := range path[1:] {
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// Slow-path: derive the raw descriptor from the v2 descriptor.
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// Start with the leaf (a given enum or message declaration) and
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// ascend upwards until we hit the parent file descriptor.
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var idxs []int
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for {
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idxs = append(idxs, d.Index())
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d = d.Parent()
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if d == nil {
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// TODO: We could construct a FileDescriptor stub for standalone
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// descriptors to satisfy the API.
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return nil, nil
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}
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if _, ok := d.(protoreflect.FileDescriptor); ok {
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break
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}
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}
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// Obtain the raw file descriptor.
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var raw []byte
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switch fd := d.(type) {
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case interface{ ProtoLegacyRawDesc() []byte }:
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raw = fd.ProtoLegacyRawDesc()
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case protoreflect.FileDescriptor:
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raw, _ = proto.Marshal(protodesc.ToFileDescriptorProto(fd))
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}
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file := protoimpl.X.CompressGZIP(raw)
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// Reverse the indexes, since we populated it in reverse.
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for i, j := 0, len(idxs)-1; i < j; i, j = i+1, j-1 {
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idxs[i], idxs[j] = idxs[j], idxs[i]
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}
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if v, ok := rawDescCache.LoadOrStore(origDesc, &rawDesc{file, idxs}); ok {
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return v.(*rawDesc).fileDesc, v.(*rawDesc).indexes
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}
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return file, idxs
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}
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// EnumRawDescriptor returns the GZIP'd raw file descriptor representing
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// the enum and the index path to reach the enum declaration.
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// The returned slices must not be mutated.
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func EnumRawDescriptor(e proto.GeneratedEnum) ([]byte, []int) {
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if ev, ok := e.(interface{ EnumDescriptor() ([]byte, []int) }); ok {
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return ev.EnumDescriptor()
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}
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ed := protoimpl.X.EnumTypeOf(e)
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return deriveRawDescriptor(ed.Descriptor())
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}
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// MessageRawDescriptor returns the GZIP'd raw file descriptor representing
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// the message and the index path to reach the message declaration.
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// The returned slices must not be mutated.
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func MessageRawDescriptor(m proto.GeneratedMessage) ([]byte, []int) {
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if mv, ok := m.(interface{ Descriptor() ([]byte, []int) }); ok {
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return mv.Descriptor()
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}
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md := protoimpl.X.MessageTypeOf(m)
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return deriveRawDescriptor(md.Descriptor())
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}
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var fileDescCache sync.Map // map[*byte]*descriptorpb.FileDescriptorProto
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func deriveFileDescriptor(rawDesc []byte) *descriptorpb.FileDescriptorProto {
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// Fast-path: check whether descriptor protos are already cached.
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if v, ok := fileDescCache.Load(&rawDesc[0]); ok {
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return v.(*descriptorpb.FileDescriptorProto)
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}
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// Slow-path: derive the descriptor proto from the GZIP'd message.
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zr, err := gzip.NewReader(bytes.NewReader(rawDesc))
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if err != nil {
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panic(err)
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}
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b, err := ioutil.ReadAll(zr)
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if err != nil {
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panic(err)
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}
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fd := new(descriptorpb.FileDescriptorProto)
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if err := proto.Unmarshal(b, fd); err != nil {
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panic(err)
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}
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if v, ok := fileDescCache.LoadOrStore(&rawDesc[0], fd); ok {
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return v.(*descriptorpb.FileDescriptorProto)
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}
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return fd
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}
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// EnumDescriptorProto returns the file descriptor proto representing
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// the enum and the enum descriptor proto for the enum itself.
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// The returned proto messages must not be mutated.
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func EnumDescriptorProto(e proto.GeneratedEnum) (*descriptorpb.FileDescriptorProto, *descriptorpb.EnumDescriptorProto) {
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rawDesc, idxs := EnumRawDescriptor(e)
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if rawDesc == nil || idxs == nil {
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return nil, nil
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}
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fd := deriveFileDescriptor(rawDesc)
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if len(idxs) == 1 {
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return fd, fd.EnumType[idxs[0]]
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}
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md := fd.MessageType[idxs[0]]
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for _, i := range idxs[1 : len(idxs)-1] {
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md = md.NestedType[i]
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}
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ed := md.EnumType[idxs[len(idxs)-1]]
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return fd, ed
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}
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// MessageDescriptorProto returns the file descriptor proto representing
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// the message and the message descriptor proto for the message itself.
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// The returned proto messages must not be mutated.
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func MessageDescriptorProto(m proto.GeneratedMessage) (*descriptorpb.FileDescriptorProto, *descriptorpb.DescriptorProto) {
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rawDesc, idxs := MessageRawDescriptor(m)
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if rawDesc == nil || idxs == nil {
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return nil, nil
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}
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fd := deriveFileDescriptor(rawDesc)
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md := fd.MessageType[idxs[0]]
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for _, i := range idxs[1:] {
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md = md.NestedType[i]
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}
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return fd, md
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