forked from mirrors/gotosocial
57 lines
1.9 KiB
Go
57 lines
1.9 KiB
Go
// 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 proto
|
|
|
|
import (
|
|
"reflect"
|
|
|
|
"google.golang.org/protobuf/reflect/protoreflect"
|
|
)
|
|
|
|
// Equal reports whether two messages are equal,
|
|
// by recursively comparing the fields of the message.
|
|
//
|
|
// - Bytes fields are equal if they contain identical bytes.
|
|
// Empty bytes (regardless of nil-ness) are considered equal.
|
|
//
|
|
// - Floating-point fields are equal if they contain the same value.
|
|
// Unlike the == operator, a NaN is equal to another NaN.
|
|
//
|
|
// - Other scalar fields are equal if they contain the same value.
|
|
//
|
|
// - Message fields are equal if they have
|
|
// the same set of populated known and extension field values, and
|
|
// the same set of unknown fields values.
|
|
//
|
|
// - Lists are equal if they are the same length and
|
|
// each corresponding element is equal.
|
|
//
|
|
// - Maps are equal if they have the same set of keys and
|
|
// the corresponding value for each key is equal.
|
|
//
|
|
// An invalid message is not equal to a valid message.
|
|
// An invalid message is only equal to another invalid message of the
|
|
// same type. An invalid message often corresponds to a nil pointer
|
|
// of the concrete message type. For example, (*pb.M)(nil) is not equal
|
|
// to &pb.M{}.
|
|
// If two valid messages marshal to the same bytes under deterministic
|
|
// serialization, then Equal is guaranteed to report true.
|
|
func Equal(x, y Message) bool {
|
|
if x == nil || y == nil {
|
|
return x == nil && y == nil
|
|
}
|
|
if reflect.TypeOf(x).Kind() == reflect.Ptr && x == y {
|
|
// Avoid an expensive comparison if both inputs are identical pointers.
|
|
return true
|
|
}
|
|
mx := x.ProtoReflect()
|
|
my := y.ProtoReflect()
|
|
if mx.IsValid() != my.IsValid() {
|
|
return false
|
|
}
|
|
vx := protoreflect.ValueOfMessage(mx)
|
|
vy := protoreflect.ValueOfMessage(my)
|
|
return vx.Equal(vy)
|
|
}
|