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third_party/crashpad/crashpad/test/scoped_temp_dir_win.cc

Index: third_party/crashpad/crashpad/test/scoped_temp_dir_win.cc
diff --git a/third_party/crashpad/crashpad/test/scoped_temp_dir_win.cc b/third_party/crashpad/crashpad/test/scoped_temp_dir_win.cc
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+// 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 "test/scoped_temp_dir.h"
+
+#include <windows.h>
+
+#include "base/logging.h"
+#include "base/strings/string16.h"
+#include "base/strings/stringprintf.h"
+#include "base/strings/utf_string_conversions.h"
+#include "util/misc/random_string.h"
+#include "gtest/gtest.h"
+
+namespace crashpad {
+namespace test {
+
+namespace {
+
+base::FilePath GenerateCandidateName() {
+  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);
+  base::string16 new_dir_name = base::UTF8ToUTF16(base::StringPrintf(
+        "crashpad.test.%d.%s", GetCurrentProcessId(), RandomString().c_str()));
+  return system_temp_dir.Append(new_dir_name);
+}
+
+const int kRetries = 50;
+
+}  // namespace
+
+void ScopedTempDir::Rename() {
+  for (int count = 0; count < kRetries; ++count) {
+    // Try to move to a new temporary directory with a randomly generated name.
+    // If the one we try exists, retry with a new name until we reach some
+    // limit.
+    base::FilePath target_path = GenerateCandidateName();
+    if (MoveFileEx(path_.value().c_str(), target_path.value().c_str(), 0)) {
+      path_ = target_path;
+      return;
+    }
+  }
+
+  CHECK(false) << "Couldn't move to a new unique temp dir";
+}
+
+// static
+base::FilePath ScopedTempDir::CreateTemporaryDirectory() {
+  for (int count = 0; count < kRetries; ++count) {
+    // Try to 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::FilePath path_to_create = GenerateCandidateName();
+    if (CreateDirectory(path_to_create.value().c_str(), NULL))
+      return path_to_create;
+  }
+
+  CHECK(false) << "Couldn't create a new unique temp dir";
+  return base::FilePath();
+}
+
+// static
+void ScopedTempDir::RecursivelyDeleteTemporaryDirectory(
+    const base::FilePath& path) {
+  const base::string16 all_files_mask(L"\\*");
+
+  base::string16 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(ERROR_FILE_NOT_FOUND, GetLastError());
+  do {
+    if (wcscmp(find_data.cFileName, L".") == 0 ||
+        wcscmp(find_data.cFileName, L"..") == 0) {
+      continue;
+    }
+    base::FilePath entry_path = path.Append(find_data.cFileName);
+    ASSERT_FALSE(find_data.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT);
+    if (find_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+      RecursivelyDeleteTemporaryDirectory(entry_path);
+    else
+      EXPECT_TRUE(DeleteFile(entry_path.value().c_str()));
+  } while (FindNextFile(search_handle, &find_data));
+  EXPECT_EQ(ERROR_NO_MORE_FILES, GetLastError());
+
+  EXPECT_TRUE(FindClose(search_handle));
+  EXPECT_TRUE(RemoveDirectory(path.value().c_str()));
+}
+
+}  // namespace test
+}  // namespace crashpad