75 lines
2 KiB
C++
75 lines
2 KiB
C++
//
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// Copyright (C) 2013 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#include "shill/ip_address_store.h"
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#include <iterator>
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#include <stdlib.h>
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#include <time.h>
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using std::advance;
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namespace shill {
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// This is a less than comparison so that IPAddress can be stored in a set.
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// We do not care about a semantically meaningful comparison. This is
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// deterministic, and that's all that matters.
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bool IPAddressLTIgnorePrefix::operator () (const IPAddress& lhs,
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const IPAddress& rhs) const {
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return lhs.ToString() < rhs.ToString();
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}
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IPAddressStore::IPAddressStore() : random_engine_(time(nullptr)) {
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}
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IPAddressStore::~IPAddressStore() {}
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void IPAddressStore::AddUnique(const IPAddress& ip) {
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ip_addresses_.insert(ip);
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}
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void IPAddressStore::Remove(const IPAddress& ip) {
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ip_addresses_.erase(ip);
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}
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void IPAddressStore::Clear() {
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ip_addresses_.clear();
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}
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bool IPAddressStore::Contains(const IPAddress& ip) const {
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return ip_addresses_.find(ip) != ip_addresses_.end();
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}
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size_t IPAddressStore::Count() const {
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return ip_addresses_.size();
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}
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bool IPAddressStore::Empty() const {
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return ip_addresses_.empty();
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}
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IPAddress IPAddressStore::GetRandomIP() {
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if (ip_addresses_.empty())
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return IPAddress(IPAddress::kFamilyUnknown);
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std::uniform_int_distribution<int> uniform_rand(0, ip_addresses_.size() - 1);
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int index = uniform_rand(random_engine_);
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IPAddresses::const_iterator cit = ip_addresses_.begin();
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advance(cit, index);
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return *cit;
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}
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} // namespace shill
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