win: Add UUID::InitializeFromSystemUUID()

util/misc/uuid_test.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 #include "util/misc/uuid.h"
 
 #include <stdint.h>
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/format_macros.h"
+#include "base/scoped_generic.h"
 #include "base/strings/stringprintf.h"
 #include "gtest/gtest.h"
 
 namespace crashpad {
 namespace test {
 namespace {
 
 TEST(UUID, UUID) {
   UUID uuid_zero;
   EXPECT_EQ(0u, uuid_zero.data_1);
@@ skipping 164 matching lines @@
   // Test for case insensitivty.
   UUID uuid;
   uuid.InitializeFromString("F32E5BDC-2681-4C73-A4E6-911FFD89B846");
   EXPECT_EQ("f32e5bdc-2681-4c73-a4e6-911ffd89b846", uuid.ToString());
 
   // Mixed case.
   uuid.InitializeFromString("5762C15D-50b5-4171-a2e9-7429C9EC6CAB");
   EXPECT_EQ("5762c15d-50b5-4171-a2e9-7429c9ec6cab", uuid.ToString());
 }
 
+#if defined(OS_WIN)
+
+TEST(UUID, FromSystem) {
+  ::GUID system_uuid;
+  ASSERT_EQ(RPC_S_OK, UuidCreate(&system_uuid));
+
+  UUID uuid;
+  uuid.InitializeFromSystemUUID(&system_uuid);
+
+  RPC_WSTR system_string;
+  ASSERT_EQ(RPC_S_OK, UuidToString(&system_uuid, &system_string));
+
+  struct ScopedRpcStringFreeTraits {
+    static RPC_WSTR* InvalidValue() { return nullptr; }
+    static void Free(RPC_WSTR* rpc_string) {
+      EXPECT_EQ(RPC_S_OK, RpcStringFree(rpc_string));
+    }
+  };
+  using ScopedRpcString =
+      base::ScopedGeneric<RPC_WSTR*, ScopedRpcStringFreeTraits>;
+  ScopedRpcString scoped_system_string(&system_string);
+
+  EXPECT_EQ(reinterpret_cast<wchar_t*>(system_string), uuid.ToString16());
+}
+
+#endif  // OS_WIN
+
 }  // namespace
 }  // namespace test
 }  // namespace crashpad