--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/google.golang.org/protobuf/internal/impl/decode.go Sun Jul 11 10:35:56 2021 +0200
@@ -0,0 +1,276 @@
+// 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 (
+ "math/bits"
+
+ "google.golang.org/protobuf/encoding/protowire"
+ "google.golang.org/protobuf/internal/errors"
+ "google.golang.org/protobuf/internal/flags"
+ "google.golang.org/protobuf/proto"
+ "google.golang.org/protobuf/reflect/protoreflect"
+ preg "google.golang.org/protobuf/reflect/protoregistry"
+ "google.golang.org/protobuf/runtime/protoiface"
+ piface "google.golang.org/protobuf/runtime/protoiface"
+)
+
+var errDecode = errors.New("cannot parse invalid wire-format data")
+
+type unmarshalOptions struct {
+ flags protoiface.UnmarshalInputFlags
+ resolver interface {
+ FindExtensionByName(field protoreflect.FullName) (protoreflect.ExtensionType, error)
+ FindExtensionByNumber(message protoreflect.FullName, field protoreflect.FieldNumber) (protoreflect.ExtensionType, error)
+ }
+}
+
+func (o unmarshalOptions) Options() proto.UnmarshalOptions {
+ return proto.UnmarshalOptions{
+ Merge: true,
+ AllowPartial: true,
+ DiscardUnknown: o.DiscardUnknown(),
+ Resolver: o.resolver,
+ }
+}
+
+func (o unmarshalOptions) DiscardUnknown() bool { return o.flags&piface.UnmarshalDiscardUnknown != 0 }
+
+func (o unmarshalOptions) IsDefault() bool {
+ return o.flags == 0 && o.resolver == preg.GlobalTypes
+}
+
+var lazyUnmarshalOptions = unmarshalOptions{
+ resolver: preg.GlobalTypes,
+}
+
+type unmarshalOutput struct {
+ n int // number of bytes consumed
+ initialized bool
+}
+
+// unmarshal is protoreflect.Methods.Unmarshal.
+func (mi *MessageInfo) unmarshal(in piface.UnmarshalInput) (piface.UnmarshalOutput, error) {
+ var p pointer
+ if ms, ok := in.Message.(*messageState); ok {
+ p = ms.pointer()
+ } else {
+ p = in.Message.(*messageReflectWrapper).pointer()
+ }
+ out, err := mi.unmarshalPointer(in.Buf, p, 0, unmarshalOptions{
+ flags: in.Flags,
+ resolver: in.Resolver,
+ })
+ var flags piface.UnmarshalOutputFlags
+ if out.initialized {
+ flags |= piface.UnmarshalInitialized
+ }
+ return piface.UnmarshalOutput{
+ Flags: flags,
+ }, err
+}
+
+// errUnknown is returned during unmarshaling to indicate a parse error that
+// should result in a field being placed in the unknown fields section (for example,
+// when the wire type doesn't match) as opposed to the entire unmarshal operation
+// failing (for example, when a field extends past the available input).
+//
+// This is a sentinel error which should never be visible to the user.
+var errUnknown = errors.New("unknown")
+
+func (mi *MessageInfo) unmarshalPointer(b []byte, p pointer, groupTag protowire.Number, opts unmarshalOptions) (out unmarshalOutput, err error) {
+ mi.init()
+ if flags.ProtoLegacy && mi.isMessageSet {
+ return unmarshalMessageSet(mi, b, p, opts)
+ }
+ initialized := true
+ var requiredMask uint64
+ var exts *map[int32]ExtensionField
+ start := len(b)
+ for len(b) > 0 {
+ // Parse the tag (field number and wire type).
+ var tag uint64
+ if b[0] < 0x80 {
+ tag = uint64(b[0])
+ b = b[1:]
+ } else if len(b) >= 2 && b[1] < 128 {
+ tag = uint64(b[0]&0x7f) + uint64(b[1])<<7
+ b = b[2:]
+ } else {
+ var n int
+ tag, n = protowire.ConsumeVarint(b)
+ if n < 0 {
+ return out, errDecode
+ }
+ b = b[n:]
+ }
+ var num protowire.Number
+ if n := tag >> 3; n < uint64(protowire.MinValidNumber) || n > uint64(protowire.MaxValidNumber) {
+ return out, errDecode
+ } else {
+ num = protowire.Number(n)
+ }
+ wtyp := protowire.Type(tag & 7)
+
+ if wtyp == protowire.EndGroupType {
+ if num != groupTag {
+ return out, errDecode
+ }
+ groupTag = 0
+ break
+ }
+
+ var f *coderFieldInfo
+ if int(num) < len(mi.denseCoderFields) {
+ f = mi.denseCoderFields[num]
+ } else {
+ f = mi.coderFields[num]
+ }
+ var n int
+ err := errUnknown
+ switch {
+ case f != nil:
+ if f.funcs.unmarshal == nil {
+ break
+ }
+ var o unmarshalOutput
+ o, err = f.funcs.unmarshal(b, p.Apply(f.offset), wtyp, f, opts)
+ n = o.n
+ if err != nil {
+ break
+ }
+ requiredMask |= f.validation.requiredBit
+ if f.funcs.isInit != nil && !o.initialized {
+ initialized = false
+ }
+ default:
+ // Possible extension.
+ if exts == nil && mi.extensionOffset.IsValid() {
+ exts = p.Apply(mi.extensionOffset).Extensions()
+ if *exts == nil {
+ *exts = make(map[int32]ExtensionField)
+ }
+ }
+ if exts == nil {
+ break
+ }
+ var o unmarshalOutput
+ o, err = mi.unmarshalExtension(b, num, wtyp, *exts, opts)
+ if err != nil {
+ break
+ }
+ n = o.n
+ if !o.initialized {
+ initialized = false
+ }
+ }
+ if err != nil {
+ if err != errUnknown {
+ return out, err
+ }
+ n = protowire.ConsumeFieldValue(num, wtyp, b)
+ if n < 0 {
+ return out, errDecode
+ }
+ if !opts.DiscardUnknown() && mi.unknownOffset.IsValid() {
+ u := mi.mutableUnknownBytes(p)
+ *u = protowire.AppendTag(*u, num, wtyp)
+ *u = append(*u, b[:n]...)
+ }
+ }
+ b = b[n:]
+ }
+ if groupTag != 0 {
+ return out, errDecode
+ }
+ if mi.numRequiredFields > 0 && bits.OnesCount64(requiredMask) != int(mi.numRequiredFields) {
+ initialized = false
+ }
+ if initialized {
+ out.initialized = true
+ }
+ out.n = start - len(b)
+ return out, nil
+}
+
+func (mi *MessageInfo) unmarshalExtension(b []byte, num protowire.Number, wtyp protowire.Type, exts map[int32]ExtensionField, opts unmarshalOptions) (out unmarshalOutput, err error) {
+ x := exts[int32(num)]
+ xt := x.Type()
+ if xt == nil {
+ var err error
+ xt, err = opts.resolver.FindExtensionByNumber(mi.Desc.FullName(), num)
+ if err != nil {
+ if err == preg.NotFound {
+ return out, errUnknown
+ }
+ return out, errors.New("%v: unable to resolve extension %v: %v", mi.Desc.FullName(), num, err)
+ }
+ }
+ xi := getExtensionFieldInfo(xt)
+ if xi.funcs.unmarshal == nil {
+ return out, errUnknown
+ }
+ if flags.LazyUnmarshalExtensions {
+ if opts.IsDefault() && x.canLazy(xt) {
+ out, valid := skipExtension(b, xi, num, wtyp, opts)
+ switch valid {
+ case ValidationValid:
+ if out.initialized {
+ x.appendLazyBytes(xt, xi, num, wtyp, b[:out.n])
+ exts[int32(num)] = x
+ return out, nil
+ }
+ case ValidationInvalid:
+ return out, errDecode
+ case ValidationUnknown:
+ }
+ }
+ }
+ ival := x.Value()
+ if !ival.IsValid() && xi.unmarshalNeedsValue {
+ // Create a new message, list, or map value to fill in.
+ // For enums, create a prototype value to let the unmarshal func know the
+ // concrete type.
+ ival = xt.New()
+ }
+ v, out, err := xi.funcs.unmarshal(b, ival, num, wtyp, opts)
+ if err != nil {
+ return out, err
+ }
+ if xi.funcs.isInit == nil {
+ out.initialized = true
+ }
+ x.Set(xt, v)
+ exts[int32(num)] = x
+ return out, nil
+}
+
+func skipExtension(b []byte, xi *extensionFieldInfo, num protowire.Number, wtyp protowire.Type, opts unmarshalOptions) (out unmarshalOutput, _ ValidationStatus) {
+ if xi.validation.mi == nil {
+ return out, ValidationUnknown
+ }
+ xi.validation.mi.init()
+ switch xi.validation.typ {
+ case validationTypeMessage:
+ if wtyp != protowire.BytesType {
+ return out, ValidationUnknown
+ }
+ v, n := protowire.ConsumeBytes(b)
+ if n < 0 {
+ return out, ValidationUnknown
+ }
+ out, st := xi.validation.mi.validate(v, 0, opts)
+ out.n = n
+ return out, st
+ case validationTypeGroup:
+ if wtyp != protowire.StartGroupType {
+ return out, ValidationUnknown
+ }
+ out, st := xi.validation.mi.validate(b, num, opts)
+ return out, st
+ default:
+ return out, ValidationUnknown
+ }
+}