Data.h

/*
 * (C) Copyright 2020 ECMWF.
 *
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
 * In applying this licence, ECMWF does not waive the privileges and immunities
 * granted to it by virtue of its status as an intergovernmental organisation
 * nor does it submit to any jurisdiction.
 */

#pragma once

#include "eckit/io/Buffer.h"

namespace atlas {
namespace io {

class Stream;

//---------------------------------------------------------------------------------------------------------------------

class Data {
public:
    Data() = default;
    Data( void*, size_t );
    Data( Data&& ) = default;
    Data& operator=( Data&& ) = default;

    operator const void*() const { return data(); }
    const void* data() const { return buffer_.data(); }
    size_t size() const { return size_; }

    void assign( const Data& other );
    void assign( const void*, size_t );
    void clear();

    std::uint64_t write( Stream& out ) const;
    std::uint64_t read( Stream& in, size_t size );
    void compress( const std::string& compression );
    void decompress( const std::string& compression, size_t uncompressed_size );
    std::string checksum( const std::string& algorithm = "" ) const;

private:
    eckit::Buffer buffer_;
    size_t size_{0};
};

//---------------------------------------------------------------------------------------------------------------------

void encode_data( const Data&, Data& out );

//---------------------------------------------------------------------------------------------------------------------

}  // namespace io
}  // namespace atlas