// Copyright (c) 2005-2021 Jay Berkenbilt
// Copyright (c) 2022-2025 Jay Berkenbilt and Manfred Holger
//
// This file is part of qpdf.
//
// 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.
//
// Versions of qpdf prior to version 7 were released under the terms
// of version 2.0 of the Artistic License. At your option, you may
// continue to consider qpdf to be licensed under those terms. Please
// see the manual for additional information.

#ifndef RANDOMDATAPROVIDER_HH
#define RANDOMDATAPROVIDER_HH

#include <qpdf/DLL.h>
#include <cstring> // for size_t

class QPDF_DLL_CLASS RandomDataProvider
{
  public:
    virtual ~RandomDataProvider() = default;
    virtual void provideRandomData(unsigned char* data, size_t len) = 0;

  protected:
    QPDF_DLL_PRIVATE
    RandomDataProvider() = default;

  private:
    RandomDataProvider(RandomDataProvider const&) = delete;
    RandomDataProvider& operator=(RandomDataProvider const&) = delete;
};

#endif // RANDOMDATAPROVIDER_HH