1 /*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
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 "i18n_hilog.h"
16 #include "negative_rule.h"
17 #include "i18n_hilog.h"
18
19 namespace OHOS {
20 namespace Global {
21 namespace I18n {
NegativeRule(icu::UnicodeString & regex,std::string & insensitive)22 NegativeRule::NegativeRule(icu::UnicodeString& regex, std::string& insensitive)
23 {
24 this->regex = regex;
25 this->insensitive = insensitive;
26 }
27
GetPattern()28 icu::RegexPattern* NegativeRule::GetPattern()
29 {
30 UErrorCode status = U_ZERO_ERROR;
31 icu::RegexPattern* pattern;
32 // Sets whether regular expression matching is case sensitive
33 if (this->insensitive == "True") {
34 pattern = icu::RegexPattern::compile(this->regex, URegexpFlag::UREGEX_CASE_INSENSITIVE, status);
35 } else {
36 pattern = icu::RegexPattern::compile(this->regex, 0, status);
37 }
38 if (U_FAILURE(status)) {
39 HILOG_ERROR_I18N("NegativeRule::GetPattern: Compile regex pattern failed.");
40 return nullptr;
41 }
42 return pattern;
43 }
44
ReplaceSpecifiedPos(icu::UnicodeString & chs,int start,int end)45 void NegativeRule::ReplaceSpecifiedPos(icu::UnicodeString& chs, int start, int end)
46 {
47 if (start < end) {
48 int len = chs.length();
49 for (int i = 0; i < len; i++) {
50 if (i >= start && i < end) {
51 chs.replace(i, 1, 'A');
52 }
53 }
54 }
55 }
56
Handle(icu::UnicodeString & src)57 icu::UnicodeString NegativeRule::Handle(icu::UnicodeString& src)
58 {
59 icu::UnicodeString ret = src;
60 icu::RegexPattern* pattern = GetPattern();
61 if (pattern == nullptr) {
62 HILOG_ERROR_I18N("NegativeRule::Handle: pattern is nullptr.");
63 return ret;
64 }
65 UErrorCode status = U_ZERO_ERROR;
66 icu::RegexMatcher* matcher = pattern->matcher(ret, status);
67 while (matcher != nullptr && matcher->find(status)) {
68 int start = matcher->start(status);
69 int end = matcher->end(status);
70 ReplaceSpecifiedPos(ret, start, end);
71 }
72 delete matcher;
73 delete pattern;
74 return ret;
75 }
76 } // namespace I18n
77 } // namespace Global
78 } // namespace OHOS