1 // Copyright 2015 Google Inc. All rights reserved.
2 //
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 #include "check.h"
16 #include "re.h"
17
18 namespace benchmark {
19
Regex()20 Regex::Regex() : init_(false) { }
21
Init(const std::string & spec,std::string * error)22 bool Regex::Init(const std::string& spec, std::string* error) {
23 int ec = regcomp(&re_, spec.c_str(), REG_EXTENDED | REG_NOSUB);
24 if (ec != 0) {
25 if (error) {
26 size_t needed = regerror(ec, &re_, nullptr, 0);
27 char* errbuf = new char[needed];
28 regerror(ec, &re_, errbuf, needed);
29
30 // regerror returns the number of bytes necessary to null terminate
31 // the string, so we move that when assigning to error.
32 CHECK_NE(needed, 0);
33 error->assign(errbuf, needed - 1);
34
35 delete[] errbuf;
36 }
37
38 return false;
39 }
40
41 init_ = true;
42 return true;
43 }
44
~Regex()45 Regex::~Regex() {
46 if (init_) {
47 regfree(&re_);
48 }
49 }
50
Match(const std::string & str)51 bool Regex::Match(const std::string& str) {
52 if (!init_) {
53 return false;
54 }
55
56 return regexec(&re_, str.c_str(), 0, nullptr, 0) == 0;
57 }
58
59 } // end namespace benchmark
60