1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef OTAPREOPT_FILE_PARSING_H_
18 #define OTAPREOPT_FILE_PARSING_H_
19
20 #include <fstream>
21 #include <functional>
22 #include <string_view>
23 #include "android-base/unique_fd.h"
24
25 namespace android {
26 namespace installd {
27
28 template<typename Func>
ParseFile(std::istream & input_stream,Func parse)29 bool ParseFile(std::istream& input_stream, Func parse) {
30 while (!input_stream.eof()) {
31 // Read the next line.
32 std::string line;
33 getline(input_stream, line);
34
35 // Is the line empty? Simplifies the next check.
36 if (line.empty()) {
37 continue;
38 }
39
40 // Is this a comment (starts with pound)?
41 if (line[0] == '#') {
42 continue;
43 }
44
45 if (!parse(line)) {
46 return false;
47 }
48 }
49
50 return true;
51 }
52
53 template<typename Func>
ParseFile(const std::string & str_file,Func parse)54 bool ParseFile(const std::string& str_file, Func parse) {
55 std::ifstream ifs(str_file);
56 if (!ifs.is_open()) {
57 return false;
58 }
59 return ParseFile(ifs, parse);
60 }
61
62 } // namespace installd
63 } // namespace android
64
65 #endif // OTAPREOPT_FILE_PARSING_H_
66