Dataset.hpp

/* Copyright 2017-2025 Fabian Koller, Franz Poeschel, Axel Huebl, Junmin Gu
 *
 * This file is part of openPMD-api.
 *
 * openPMD-api is free software: you can redistribute it and/or modify
 * it under the terms of of either the GNU General Public License or
 * the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * openPMD-api is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License and the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License
 * and the GNU Lesser General Public License along with openPMD-api.
 * If not, see <http://www.gnu.org/licenses/>.
 */
#pragma once
 
#include "openPMD/Datatype.hpp"
 
#include <limits>
#include <memory>
#include <optional>
#include <string>
#include <type_traits>
#include <vector>
 
namespace openPMD
{
using Extent = std::vector<std::uint64_t>;
using Offset = std::vector<std::uint64_t>;
 
class Dataset
{
    friend class RecordComponent;
 
public:
    enum : std::uint64_t
    {
        JOINED_DIMENSION = std::numeric_limits<std::uint64_t>::max(),
        UNDEFINED_EXTENT = std::numeric_limits<std::uint64_t>::max() - 1
    };
 
    Dataset(Datatype, Extent, std::string options = "{}");

    Dataset(Extent = {UNDEFINED_EXTENT});
 
    Dataset &extend(Extent newExtent);
 
    Extent extent;
    Datatype dtype;
    uint8_t rank;
    std::string options = "{}"; 
 
    bool empty() const;
 
    std::optional<size_t> joinedDimension() const;
    static std::optional<size_t> joinedDimension(Extent const &);
 
    bool undefinedExtent() const;
    static bool undefinedExtent(Extent const &);
};
} // namespace openPMD