win: Add HandleToInt() and IntToHandle()

util/win/handle_test.cc

+// Copyright 2015 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/win/handle.h"
+
+#include <stdint.h>
+
+#include <limits>
+
+#include "gtest/gtest.h"
+
+namespace crashpad {
+namespace test {
+namespace {
+
+TEST(Handle, HandleToInt) {
+  EXPECT_EQ(0, HandleToInt(nullptr));
+  EXPECT_EQ(-1, HandleToInt(INVALID_HANDLE_VALUE));
+  EXPECT_EQ(1, HandleToInt(reinterpret_cast<HANDLE>(1)));
+  EXPECT_EQ(std::numeric_limits<int>::max(),
+            HandleToInt(reinterpret_cast<HANDLE>(
+                static_cast<intptr_t>(std::numeric_limits<int>::max()))));
+  EXPECT_EQ(std::numeric_limits<int>::min(),
+            HandleToInt(reinterpret_cast<HANDLE>(
+                static_cast<intptr_t>(std::numeric_limits<int>::min()))));
+}
+
+TEST(Handle, IntToHandle) {
+  EXPECT_EQ(nullptr, IntToHandle(0));
+  EXPECT_EQ(INVALID_HANDLE_VALUE, IntToHandle(-1));
+  EXPECT_EQ(reinterpret_cast<HANDLE>(1), IntToHandle(1));
+  EXPECT_EQ(reinterpret_cast<HANDLE>(
+                static_cast<intptr_t>(std::numeric_limits<int>::max())),
+            IntToHandle(std::numeric_limits<int>::max()));
+  EXPECT_EQ(reinterpret_cast<HANDLE>(
+                static_cast<intptr_t>(std::numeric_limits<int>::min())),
+            IntToHandle(std::numeric_limits<int>::min()));
+}
+
+}  // namespace
+}  // namespace test
+}  // namespace crashpad