| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "components/autofill/core/browser/autofill_regexes.h" |
| |
| #include <map> |
| #include <utility> |
| |
| #include "base/logging.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/memory/singleton.h" |
| #include "base/stl_util.h" |
| #include "base/strings/string16.h" |
| #include "third_party/icu/source/i18n/unicode/regex.h" |
| |
| namespace { |
| |
| // A singleton class that serves as a cache of compiled regex patterns. |
| class AutofillRegexes { |
| public: |
| static AutofillRegexes* GetInstance(); |
| |
| // Returns the compiled regex matcher corresponding to |pattern|. |
| icu::RegexMatcher* GetMatcher(const base::string16& pattern); |
| |
| private: |
| AutofillRegexes(); |
| ~AutofillRegexes(); |
| friend struct DefaultSingletonTraits<AutofillRegexes>; |
| |
| // Maps patterns to their corresponding regex matchers. |
| std::map<base::string16, icu::RegexMatcher*> matchers_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AutofillRegexes); |
| }; |
| |
| // static |
| AutofillRegexes* AutofillRegexes::GetInstance() { |
| return Singleton<AutofillRegexes>::get(); |
| } |
| |
| AutofillRegexes::AutofillRegexes() { |
| } |
| |
| AutofillRegexes::~AutofillRegexes() { |
| STLDeleteContainerPairSecondPointers(matchers_.begin(), |
| matchers_.end()); |
| } |
| |
| icu::RegexMatcher* AutofillRegexes::GetMatcher(const base::string16& pattern) { |
| if (!matchers_.count(pattern)) { |
| const icu::UnicodeString icu_pattern(pattern.data(), pattern.length()); |
| |
| UErrorCode status = U_ZERO_ERROR; |
| icu::RegexMatcher* matcher = new icu::RegexMatcher(icu_pattern, |
| UREGEX_CASE_INSENSITIVE, |
| status); |
| DCHECK(U_SUCCESS(status)); |
| |
| matchers_.insert(std::make_pair(pattern, matcher)); |
| } |
| |
| return matchers_[pattern]; |
| } |
| |
| } // namespace |
| |
| namespace autofill { |
| |
| bool MatchesPattern(const base::string16& input, |
| const base::string16& pattern) { |
| icu::RegexMatcher* matcher = |
| AutofillRegexes::GetInstance()->GetMatcher(pattern); |
| icu::UnicodeString icu_input(input.data(), input.length()); |
| matcher->reset(icu_input); |
| |
| UErrorCode status = U_ZERO_ERROR; |
| UBool match = matcher->find(0, status); |
| DCHECK(U_SUCCESS(status)); |
| return !!match; |
| } |
| |
| } // namespace autofill |