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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "components/autofill/browser/autofill_regexes.h" | |
6 | |
7 #include <map> | |
8 #include <utility> | |
9 | |
10 #include "base/logging.h" | |
11 #include "base/memory/scoped_ptr.h" | |
12 #include "base/memory/singleton.h" | |
13 #include "base/stl_util.h" | |
14 #include "base/strings/string16.h" | |
15 #include "third_party/icu/public/i18n/unicode/regex.h" | |
16 | |
17 namespace { | |
18 | |
19 // A singleton class that serves as a cache of compiled regex patterns. | |
20 class AutofillRegexes { | |
21 public: | |
22 static AutofillRegexes* GetInstance(); | |
23 | |
24 // Returns the compiled regex matcher corresponding to |pattern|. | |
25 icu::RegexMatcher* GetMatcher(const base::string16& pattern); | |
26 | |
27 private: | |
28 AutofillRegexes(); | |
29 ~AutofillRegexes(); | |
30 friend struct DefaultSingletonTraits<AutofillRegexes>; | |
31 | |
32 // Maps patterns to their corresponding regex matchers. | |
33 std::map<base::string16, icu::RegexMatcher*> matchers_; | |
34 | |
35 DISALLOW_COPY_AND_ASSIGN(AutofillRegexes); | |
36 }; | |
37 | |
38 // static | |
39 AutofillRegexes* AutofillRegexes::GetInstance() { | |
40 return Singleton<AutofillRegexes>::get(); | |
41 } | |
42 | |
43 AutofillRegexes::AutofillRegexes() { | |
44 } | |
45 | |
46 AutofillRegexes::~AutofillRegexes() { | |
47 STLDeleteContainerPairSecondPointers(matchers_.begin(), | |
48 matchers_.end()); | |
49 } | |
50 | |
51 icu::RegexMatcher* AutofillRegexes::GetMatcher(const base::string16& pattern) { | |
52 if (!matchers_.count(pattern)) { | |
53 const icu::UnicodeString icu_pattern(pattern.data(), pattern.length()); | |
54 | |
55 UErrorCode status = U_ZERO_ERROR; | |
56 icu::RegexMatcher* matcher = new icu::RegexMatcher(icu_pattern, | |
57 UREGEX_CASE_INSENSITIVE, | |
58 status); | |
59 DCHECK(U_SUCCESS(status)); | |
60 | |
61 matchers_.insert(std::make_pair(pattern, matcher)); | |
62 } | |
63 | |
64 return matchers_[pattern]; | |
65 } | |
66 | |
67 } // namespace | |
68 | |
69 namespace autofill { | |
70 | |
71 bool MatchesPattern(const base::string16& input, | |
72 const base::string16& pattern) { | |
73 icu::RegexMatcher* matcher = | |
74 AutofillRegexes::GetInstance()->GetMatcher(pattern); | |
75 icu::UnicodeString icu_input(input.data(), input.length()); | |
76 matcher->reset(icu_input); | |
77 | |
78 UErrorCode status = U_ZERO_ERROR; | |
79 UBool match = matcher->find(0, status); | |
80 DCHECK(U_SUCCESS(status)); | |
81 return !!match; | |
82 } | |
83 | |
84 } // namespace autofill | |
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