1 // Copyright (C) 2012 The Libphonenumber Authors 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 // Author: David Yonge-Mallo 16 17 #include "phonenumbers/shortnumberutil.h" 18 19 #include "phonenumbers/base/memory/scoped_ptr.h" 20 #include "phonenumbers/phonemetadata.pb.h" 21 #include "phonenumbers/phonenumberutil.h" 22 #include "phonenumbers/regexp_adapter.h" 23 #include "phonenumbers/regexp_factory.h" 24 25 namespace i18n { 26 namespace phonenumbers { 27 28 using std::string; 29 30 ShortNumberUtil::ShortNumberUtil() 31 : phone_util_(*PhoneNumberUtil::GetInstance()) { 32 } 33 34 bool ShortNumberUtil::ConnectsToEmergencyNumber(const string& number, 35 const string& region_code) const { 36 return MatchesEmergencyNumberHelper(number, region_code, 37 true /* allows prefix match */); 38 } 39 40 bool ShortNumberUtil::IsEmergencyNumber(const string& number, 41 const string& region_code) const { 42 return MatchesEmergencyNumberHelper(number, region_code, 43 false /* doesn't allow prefix match */); 44 } 45 46 bool ShortNumberUtil::MatchesEmergencyNumberHelper(const string& number, 47 const string& region_code, bool allow_prefix_match) const { 48 string extracted_number; 49 phone_util_.ExtractPossibleNumber(number, &extracted_number); 50 if (phone_util_.StartsWithPlusCharsPattern(extracted_number)) { 51 // Returns false if the number starts with a plus sign. We don't believe 52 // dialing the country code before emergency numbers (e.g. +1911) works, 53 // but later, if that proves to work, we can add additional logic here to 54 // handle it. 55 return false; 56 } 57 const PhoneMetadata* metadata = phone_util_.GetMetadataForRegion(region_code); 58 if (!metadata || !metadata->has_emergency()) { 59 return false; 60 } 61 const scoped_ptr<const AbstractRegExpFactory> regexp_factory( 62 new RegExpFactory()); 63 const scoped_ptr<const RegExp> emergency_number_pattern( 64 regexp_factory->CreateRegExp( 65 metadata->emergency().national_number_pattern())); 66 phone_util_.NormalizeDigitsOnly(&extracted_number); 67 const scoped_ptr<RegExpInput> normalized_number_input( 68 regexp_factory->CreateInput(extracted_number)); 69 70 // In Brazil, emergency numbers don't work when additional digits are 71 // appended. 72 return (!allow_prefix_match || region_code == "BR") 73 ? emergency_number_pattern->FullMatch(extracted_number) 74 : emergency_number_pattern->Consume(normalized_number_input.get()); 75 } 76 77 } // namespace phonenumbers 78 } // namespace i18n 79
