Random.h

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// Copyright 2024 libsese
//
// 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 "sese/Config.h"
#include "sese/util/Noncopyable.h"
 
namespace sese {
class SESE_DEPRECATED_WITH("Unsafe") Random : public Noncopyable {
    // for std::random_device
public:
    using ResultType = uint64_t;
 
    explicit Random(const std::string &token = "");
 
    // properties
    static ResultType min();
    static ResultType max();
    [[nodiscard]] double entropy() const;
 
    // generate
    ResultType operator()();
 
private:
    ResultType _seed;
 
    static const ResultType MULTIPLIER;
    static const ResultType ADDEND;
    static const ResultType MASK;
    static ResultType noise() noexcept;
};
} // namespace sese