// Copyright (c) 2005-2022 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.

// This class implements a simple writer for saving QPDF objects to
// new PDF files.  See comments through the header file for additional
// details.

#ifndef PDFVERSION_HH
#define PDFVERSION_HH

#include <qpdf/DLL.h>
#include <string>

class PDFVersion
{
  public:
    // Represent a PDF version. PDF versions are typically
    // major.minor, but PDF 1.7 has several extension levels as the
    // ISO 32000 spec was in progress. This class helps with
    // comparison of versions.
    QPDF_DLL
    PDFVersion();
    QPDF_DLL
    PDFVersion(PDFVersion const&) = default;
    QPDF_DLL
    PDFVersion& operator=(PDFVersion const&) = default;
    QPDF_DLL
    PDFVersion(int major, int minor, int extension = 0);
    QPDF_DLL
    bool operator<(PDFVersion const& rhs) const;
    QPDF_DLL
    bool operator==(PDFVersion const& rhs) const;

    // Replace this version with the other one if the other one is
    // greater.
    QPDF_DLL
    void updateIfGreater(PDFVersion const& other);

    // Initialize a string and integer suitable for passing to
    // QPDFWriter::setMinimumPDFVersion or QPDFWriter::forcePDFVersion.
    QPDF_DLL
    void getVersion(std::string& version, int& extension_level) const;

    QPDF_DLL
    int getMajor() const;
    QPDF_DLL
    int getMinor() const;
    QPDF_DLL
    int getExtensionLevel() const;

  private:
    int major_version;
    int minor_version;
    int extension_level;
};

#endif // PDFVERSION_HH