summaryrefslogtreecommitdiff
path: root/vendor/google.golang.org/protobuf/proto/reset.go
diff options
context:
space:
mode:
Diffstat (limited to 'vendor/google.golang.org/protobuf/proto/reset.go')
-rw-r--r--vendor/google.golang.org/protobuf/proto/reset.go43
1 files changed, 43 insertions, 0 deletions
diff --git a/vendor/google.golang.org/protobuf/proto/reset.go b/vendor/google.golang.org/protobuf/proto/reset.go
new file mode 100644
index 000000000..3d7f89436
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/proto/reset.go
@@ -0,0 +1,43 @@
+// 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 (
+ "fmt"
+
+ "google.golang.org/protobuf/reflect/protoreflect"
+)
+
+// Reset clears every field in the message.
+// The resulting message shares no observable memory with its previous state
+// other than the memory for the message itself.
+func Reset(m Message) {
+ if mr, ok := m.(interface{ Reset() }); ok && hasProtoMethods {
+ mr.Reset()
+ return
+ }
+ resetMessage(m.ProtoReflect())
+}
+
+func resetMessage(m protoreflect.Message) {
+ if !m.IsValid() {
+ panic(fmt.Sprintf("cannot reset invalid %v message", m.Descriptor().FullName()))
+ }
+
+ // Clear all known fields.
+ fds := m.Descriptor().Fields()
+ for i := 0; i < fds.Len(); i++ {
+ m.Clear(fds.Get(i))
+ }
+
+ // Clear extension fields.
+ m.Range(func(fd protoreflect.FieldDescriptor, _ protoreflect.Value) bool {
+ m.Clear(fd)
+ return true
+ })
+
+ // Clear unknown fields.
+ m.SetUnknown(nil)
+}