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// Copyright (C) 2012 The Libphonenumber Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Author: Patrick Mezard
#ifndef I18N_PHONENUMBERS_AREA_CODE_MAP_H_
#define I18N_PHONENUMBERS_AREA_CODE_MAP_H_
#include <map>
#include <string>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
namespace i18n {
namespace phonenumbers {
using std::map;
using std::string;
class DefaultMapStorage;
class PhoneNumber;
class PhoneNumberUtil;
struct PrefixDescriptions;
// A utility that maps phone number prefixes to a string describing the
// geographical area the prefix covers.
class AreaCodeMap {
public:
AreaCodeMap();
~AreaCodeMap();
// Returns the description of the geographical area the number corresponds
// to. This method distinguishes the case of an invalid prefix and a prefix
// for which the name is not available in the current language. If the
// description is not available in the current language an empty string is
// returned. If no description was found for the provided number, null is
// returned.
const char* Lookup(const PhoneNumber& number) const;
// Creates an AreaCodeMap initialized with area_codes. Note that the
// underlying implementation of this method is expensive thus should
// not be called by time-critical applications.
//
// area_codes maps phone number prefixes to geographical area description.
void ReadAreaCodeMap(const PrefixDescriptions* descriptions);
private:
// Does a binary search for value in the provided array from start to end
// (inclusive). Returns the position if {@code value} is found; otherwise,
// returns the position which has the largest value that is less than value.
// This means if value is the smallest, -1 will be returned.
int BinarySearch(int start, int end, int64 value) const;
const PhoneNumberUtil& phone_util_;
scoped_ptr<const DefaultMapStorage> storage_;
DISALLOW_COPY_AND_ASSIGN(AreaCodeMap);
};
} // namespace phonenumbers
} // namespace i18n
#endif /* I18N_PHONENUMBERS_AREA_CODE_MAP_H_ */
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