Yifan Hong | 2b93dbe | 2018-03-21 17:27:47 -0700 | [diff] [blame] | 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 |