mirror of
https://github.com/matrix-construct/construct
synced 2024-11-20 00:33:15 +01:00
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
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/*
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* Copyright (C) 2016 Charybdis Development Team
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* Copyright (C) 2016 Jason Volk <jason@zemos.net>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice is present in all copies.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#pragma once
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#define HAVE_IRCD_DB_DELTA_H
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namespace ircd {
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namespace db {
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enum op
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{
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GET,
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SET,
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MERGE,
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DELETE,
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DELETE_RANGE,
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SINGLE_DELETE,
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};
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struct delta
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:std::tuple<op, string_view, string_view>
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{
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delta(const enum op &op, const string_view &key, const string_view &val = {})
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:std::tuple<enum op, string_view, string_view>{op, key, val}
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{}
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delta(const string_view &key, const string_view &val, const enum op &op = op::SET)
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:std::tuple<enum op, string_view, string_view>{op, key, val}
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{}
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};
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using merge_delta = std::pair<string_view, string_view>;
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using merge_closure = std::function<std::string (const string_view &key, const merge_delta &)>;
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using update_closure = std::function<std::string (const string_view &key, merge_delta &)>;
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using view_closure = std::function<void (const string_view &)>;
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struct comparator
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{
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std::string name;
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std::function<bool (const string_view &, const string_view &)> less;
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std::function<bool (const string_view &, const string_view &)> equal;
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};
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} // namespace db
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} // namespace ircd
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