downloader.hpp

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// Copyright 2009-present MongoDB, Inc.
//
// 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.
 
#pragma once
 
#include <mongocxx/gridfs/downloader-fwd.hpp> // IWYU pragma: export
 
//
 
#include <mongocxx/v1/gridfs/downloader.hpp> // IWYU pragma: export
 
#include <cstddef>
#include <cstdint>
#include <memory> // IWYU pragma: keep: backward compatibility, to be removed.
#include <utility>
 
#include <mongocxx/gridfs/bucket-fwd.hpp> // IWYU pragma: keep: backward compatibility, to be removed.
 
#include <bsoncxx/document/value.hpp> // IWYU pragma: keep: backward compatibility, to be removed.
#include <bsoncxx/document/view.hpp>
#include <bsoncxx/stdx/optional.hpp>         // IWYU pragma: keep: backward compatibility, to be removed.
#include <bsoncxx/types/bson_value/view.hpp> // IWYU pragma: keep: backward compatibility, to be removed.
 
#include <mongocxx/cursor.hpp> // IWYU pragma: keep: backward compatibility, to be removed.
 
#include <mongocxx/config/prelude.hpp>
 
namespace mongocxx {
namespace v_noabi {
namespace gridfs {

struct chunks_and_bytes_offset {
    std::int32_t chunks_offset = 0;
    std::int32_t bytes_offset = 0;
};

class downloader {
   private:
    v1::gridfs::downloader _downloader;
 
   public:
    downloader() noexcept {}

    downloader(downloader&& other) noexcept = default;

    downloader& operator=(downloader&& other) noexcept = default;
 
    downloader(downloader const& other) = delete;
    downloader& operator=(downloader const& other) = delete;

    ~downloader() = default;

    /* explicit(false) */ downloader(v1::gridfs::downloader downloader) : _downloader{std::move(downloader)} {}

    explicit operator v1::gridfs::downloader() && {
        return std::move(_downloader);
    }

    explicit operator v1::gridfs::downloader() const& = delete;

    explicit operator bool() const noexcept {
        return _downloader.operator bool();
    }

    MONGOCXX_ABI_EXPORT_CDECL(std::size_t) read(std::uint8_t* buffer, std::size_t length);

    MONGOCXX_ABI_EXPORT_CDECL(void) close();

    MONGOCXX_ABI_EXPORT_CDECL(std::int32_t) chunk_size() const;

    MONGOCXX_ABI_EXPORT_CDECL(std::int64_t) file_length() const;

    MONGOCXX_ABI_EXPORT_CDECL(bsoncxx::v_noabi::document::view) files_document() const;
 
    class internal;
};
 
} // namespace gridfs
} // namespace v_noabi
} // namespace mongocxx
 
namespace mongocxx {
namespace v_noabi {

inline v_noabi::gridfs::downloader from_v1(v1::gridfs::downloader v) {
    return {std::move(v)};
}

inline v1::gridfs::downloader to_v1(v_noabi::gridfs::downloader v) {
    return v1::gridfs::downloader{std::move(v)};
}
 
} // namespace v_noabi
} // namespace mongocxx
 
#include <mongocxx/config/postlude.hpp>