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construct/include/ircd/db/row.h

67 lines
2.2 KiB
C++

/*
* Copyright (C) 2016 Charybdis Development Team
* Copyright (C) 2016 Jason Volk <jason@zemos.net>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#pragma once
#define HAVE_IRCD_DB_ROW_H
namespace ircd {
namespace db {
struct cell
{
explicit
cell(database &,
column,
const string_view &key,
gopts opts = {});
};
struct row
{
using key_type = column;
using mapped_type = std::unique_ptr<rocksdb::Iterator>;
using value_type = std::pair<key_type, mapped_type>;
gopts opts;
std::vector<value_type> its;
template<class pos> friend void seek(row &, const pos &);
friend void seek(row &, const string_view &key);
public:
auto begin() const { return std::begin(its); }
auto end() const { return std::end(its); }
auto begin() { return std::begin(its); }
auto end() { return std::end(its); }
string_view operator[](const string_view &column);
row(database &, const string_view &key = {}, gopts = {});
row() = default;
row(row &&) noexcept;
row &operator=(row &&) noexcept;
~row() noexcept;
};
} // namespace db
} // namespace ircd