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/*
* Copyright 2019 The Android Open Source Project
*
* 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.
*/
#pragma once
#include <cstdint>
namespace bluetooth {
namespace l2cap {
struct SignalId {
public:
constexpr SignalId(uint8_t value) : value_(value) {}
constexpr SignalId() : value_(1) {}
~SignalId() = default;
uint8_t Value() const {
return value_;
}
bool IsValid() const {
return value_ != 0;
}
friend bool operator==(const SignalId& lhs, const SignalId& rhs);
friend bool operator!=(const SignalId& lhs, const SignalId& rhs);
struct SignalId& operator++(); // Prefix increment operator.
struct SignalId operator++(int); // Postfix increment operator.
struct SignalId& operator--(); // Prefix decrement operator.
struct SignalId operator--(int); // Postfix decrement operator.
private:
uint8_t value_;
};
constexpr SignalId kInvalidSignalId{0};
constexpr SignalId kInitialSignalId{1};
inline bool operator==(const SignalId& lhs, const SignalId& rhs) {
return lhs.value_ == rhs.value_;
}
inline bool operator!=(const SignalId& lhs, const SignalId& rhs) {
return !(lhs == rhs);
}
inline struct SignalId& SignalId::operator++() {
value_++;
if (value_ == 0) value_++;
return *this;
}
inline struct SignalId SignalId::operator++(int) {
struct SignalId tmp = *this;
++*this;
return tmp;
}
inline struct SignalId& SignalId::operator--() {
value_--;
if (value_ == 0) value_ = 0xff;
return *this;
}
inline struct SignalId SignalId::operator--(int) {
struct SignalId tmp = *this;
--*this;
return tmp;
}
} // namespace l2cap
} // namespace bluetooth
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