From 1a7a7fca804afa1cf67f8be5e71092898ba40334 Mon Sep 17 00:00:00 2001
From: Jisi Liu <jisi.liu@gmail.com>
Date: Wed, 18 Oct 2017 12:22:18 -0700
Subject: Merge from google internal

---
 src/google/protobuf/generated_message_util.cc | 30 +++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'src/google/protobuf/generated_message_util.cc')

diff --git a/src/google/protobuf/generated_message_util.cc b/src/google/protobuf/generated_message_util.cc
index c9dfe61a..15d84222 100644
--- a/src/google/protobuf/generated_message_util.cc
+++ b/src/google/protobuf/generated_message_util.cc
@@ -43,14 +43,17 @@
 #include <google/protobuf/extension_set.h>
 #include <google/protobuf/message_lite.h>
 #include <google/protobuf/metadata_lite.h>
+#include <google/protobuf/stubs/port.h>
 #include <google/protobuf/repeated_field.h>
 #include <google/protobuf/wire_format_lite.h>
 #include <google/protobuf/wire_format_lite_inl.h>
 
 namespace google {
+
 namespace protobuf {
 namespace internal {
 
+
 double Infinity() {
   return std::numeric_limits<double>::infinity();
 }
@@ -695,6 +698,33 @@ void UnknownFieldSerializerLite(const uint8* ptr, uint32 offset, uint32 tag,
           ->unknown_fields());
 }
 
+MessageLite* DuplicateIfNonNullInternal(MessageLite* message, Arena* arena) {
+  if (message) {
+    MessageLite* ret = message->New(arena);
+    ret->CheckTypeAndMergeFrom(*message);
+    return ret;
+  } else {
+    return NULL;
+  }
+}
+
+// Returns a message owned by this Arena.  This may require Own()ing or
+// duplicating the message.
+MessageLite* GetOwnedMessageInternal(Arena* message_arena,
+                                     MessageLite* submessage,
+                                     Arena* submessage_arena) {
+  GOOGLE_DCHECK(submessage->GetArena() == submessage_arena);
+  GOOGLE_DCHECK(message_arena != submessage_arena);
+  if (message_arena != NULL && submessage_arena == NULL) {
+    message_arena->Own(submessage);
+    return submessage;
+  } else {
+    MessageLite* ret = submessage->New(message_arena);
+    ret->CheckTypeAndMergeFrom(*submessage);
+    return ret;
+  }
+}
+
 }  // namespace internal
 }  // namespace protobuf
 }  // namespace google
-- 
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