win: Add implementation of ScopedTempDir

util/test/scoped_temp_dir_win.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/test/scoped_temp_dir.h"
+
+#include <windows.h>
+
+#include "base/logging.h"
+#include "base/rand_util.h"
+#include "base/strings/string16.h"
+#include "base/strings/stringprintf.h"
+#include "base/strings/utf_string_conversions.h"
+#include "gtest/gtest.h"
+
+namespace crashpad {
+namespace test {
+
+// static
+base::FilePath ScopedTempDir::CreateTemporaryDirectory() {
+  wchar_t temp_path[MAX_PATH + 1];
+  DWORD path_len = GetTempPath(MAX_PATH, temp_path);
+  PCHECK(path_len != 0) << "GetTempPath";
+  base::FilePath system_temp_dir(temp_path);
+
+  for (int count = 0; count < 50; ++count) {
+    // Try create a new temporary directory with random generated name. If the
+    // one we generate exists, keep trying another path name until we reach some
+    // limit.
+    base::string16 new_dir_name = base::UTF8ToUTF16(base::StringPrintf(
+        "crashpad.test.%d.%I64u", GetCurrentProcessId(), base::RandUint64()));

[Mark Mentovai, 2015/01/13 21:38:32]

x instead of u to conserve a few characters?

[scottmg, 2015/01/13 21:42:45]

Done.

+
+    base::FilePath path_to_create = system_temp_dir.Append(new_dir_name);
+    if (CreateDirectory(path_to_create.value().c_str(), NULL))
+      return path_to_create;
+  }
+
+  CHECK(false) << "Couldn't find temp dir name";
+  return base::FilePath();
+}
+
+// static
+void ScopedTempDir::RecursivelyDeleteTemporaryDirectory(
+    const base::FilePath& path) {
+  const std::wstring all_files_mask(L"\\*");
+
+  std::wstring search_mask = path.value() + all_files_mask;
+  WIN32_FIND_DATA find_data;
+  HANDLE search_handle = FindFirstFile(search_mask.c_str(), &find_data);
+  if (search_handle == INVALID_HANDLE_VALUE) {
+    ASSERT_EQ(GetLastError(), ERROR_FILE_NOT_FOUND);
+    return;
+  }
+  for (;;) {
+    if (wcscmp(find_data.cFileName, L".") != 0 &&
+        wcscmp(find_data.cFileName, L"..") != 0) {
+      bool is_dir =
+          (find_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0 ||
+          (find_data.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0;
+      base::FilePath entry_path = path.Append(find_data.cFileName);
+      if (is_dir)
+        RecursivelyDeleteTemporaryDirectory(entry_path);
+      else
+        EXPECT_TRUE(DeleteFile(entry_path.value().c_str()));
+    }
+
+    if (!FindNextFile(search_handle, &find_data)) {
+      EXPECT_EQ(GetLastError(), ERROR_NO_MORE_FILES);
+      break;
+    }
+  }
+
+  EXPECT_TRUE(FindClose(search_handle));
+  EXPECT_TRUE(RemoveDirectory(path.value().c_str()));
+}
+
+}  // namespace test
+}  // namespace crashpad