1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
// 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/common/autofill_regexes.h"
#include <memory>
#include <unordered_map>
#include <utility>
#include "base/logging.h"
#include "base/macros.h"
#include "base/memory/singleton.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 base::DefaultSingletonTraits<AutofillRegexes>;
// Maps patterns to their corresponding regex matchers.
std::unordered_map<base::string16, std::unique_ptr<icu::RegexMatcher>>
matchers_;
DISALLOW_COPY_AND_ASSIGN(AutofillRegexes);
};
// static
AutofillRegexes* AutofillRegexes::GetInstance() {
return base::Singleton<AutofillRegexes>::get();
}
AutofillRegexes::AutofillRegexes() {
}
AutofillRegexes::~AutofillRegexes() {
}
icu::RegexMatcher* AutofillRegexes::GetMatcher(const base::string16& pattern) {
auto it = matchers_.find(pattern);
if (it == matchers_.end()) {
const icu::UnicodeString icu_pattern(pattern.data(), pattern.length());
UErrorCode status = U_ZERO_ERROR;
std::unique_ptr<icu::RegexMatcher> matcher(
new icu::RegexMatcher(icu_pattern, UREGEX_CASE_INSENSITIVE, status));
DCHECK(U_SUCCESS(status));
auto result = matchers_.insert(std::make_pair(pattern, std::move(matcher)));
DCHECK(result.second);
it = result.first;
}
return it->second.get();
}
} // 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 == TRUE;
}
} // namespace autofill
|
