// 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 QPDFSYSTEMERROR_HH

#define QPDFSYSTEMERROR_HH

#include <qpdf/Constants.h>

#include <qpdf/DLL.h>

#include <qpdf/Types.h>

#include <stdexcept>

#include <string>

class QPDF_DLL_CLASS QPDFSystemError: public std::runtime_error

{

  public:

    QPDF_DLL

    QPDFSystemError(std::string const& description, int system_errno);

    ~QPDFSystemError() noexcept override = default;

    // To get a complete error string, call what(), provided by std::exception.  The accessors below

    // return the original values used to create the exception.

    QPDF_DLL

    std::string const& getDescription() const;

    QPDF_DLL

    int getErrno() const;

  private:

    QPDF_DLL_PRIVATE

    static std::string createWhat(std::string const& description, int system_errno);

    // This class does not use the Members pattern to avoid needless memory allocations during

    // exception handling.

    std::string description;

    int system_errno;

};

#endif // QPDFSYSTEMERROR_HH