1 /*
2 * Copyright (c) 2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #ifndef FILE_UTIL_H
17 #define FILE_UTIL_H
18
19 #include <fstream>
20 #include <algorithm>
21 #include <string>
22
23 namespace OHOS {
24 namespace HiviewDFX {
25 namespace {
26 const int MAX_FILE_LENGTH = 32 * 1024 * 1024;
27 }
28
LoadStringFromFile(const std::string& filePath, std::string& content)29 static bool LoadStringFromFile(const std::string& filePath, std::string& content)
30 {
31 std::ifstream file(filePath.c_str());
32 if (!file.is_open()) {
33 return false;
34 }
35
36 file.seekg(0, std::ios::end);
37 const long fileLength = file.tellg();
38 if (fileLength > MAX_FILE_LENGTH) {
39 return false;
40 }
41
42 content.clear();
43 file.seekg(0, std::ios::beg);
44 std::copy(std::istreambuf_iterator<char>(file), std::istreambuf_iterator<char>(), std::back_inserter(content));
45 return true;
46 }
47 } // namespace HiviewDFX
48 } // namespace OHOS
49 #endif
50