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qpdf/include/qpdf/QPDFSystemError.hh

57 lines
1.8 KiB
C++

// Copyright (c) 2005-2023 Jay Berkenbilt
//
// 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);
QPDF_DLL
~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