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construct/include/ircd/db/database/prefix_transform.h

35 lines
1.2 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2018 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. The
// full license for this software is available in the LICENSE file.
#pragma once
#define HAVE_IRCD_DB_DATABASE_PREFIX_TRANSFORM_H
// This file is not part of the standard include stack because it requires
// RocksDB symbols which we cannot forward declare. It is used internally
// and does not need to be included by general users of IRCd.
struct ircd::db::database::prefix_transform final
:rocksdb::SliceTransform
{
using Slice = rocksdb::Slice;
database *d;
db::prefix_transform user;
const char *Name() const noexcept override;
bool InDomain(const Slice &key) const noexcept override;
bool InRange(const Slice &key) const noexcept override;
Slice Transform(const Slice &key) const noexcept override;
prefix_transform(database *const &d, db::prefix_transform user)
:d{d}
,user{std::move(user)}
{}
};