1 /*
2  * Copyright (C) 2018 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 #include "Regex.h"
18 
19 namespace android {
20 namespace vintf {
21 namespace details {
22 
23 Regex::~Regex() {
24     clear();
25 }
26 
27 void Regex::clear() {
28     if (mImpl != nullptr) {
29         regfree(mImpl.get());
30         mImpl = nullptr;
31     }
32 }
33 
34 bool Regex::compile(const std::string& pattern) {
35     clear();
36     mImpl = std::make_unique<regex_t>();
37     int status = regcomp(mImpl.get(), pattern.c_str(), REG_EXTENDED | REG_NEWLINE);
38     return status == 0;
39 }
40 
41 bool Regex::matches(const std::string& s) const {
42     regmatch_t match;
43     int status =
44         regexec(mImpl.get(), s.c_str(), 1 /* nmatch */, &match /* pmatch */, 0 /* flags */);
45     return status == 0 && match.rm_so == 0 && match.rm_eo >= 0 &&
46            static_cast<size_t>(match.rm_eo) == s.length();
47 }
48 
49 }  // namespace details
50 }  // namespace vintf
51 }  // namespace android
52