mirror of
https://github.com/matrix-construct/construct
synced 2024-11-09 11:31:11 +01:00
84 lines
2.9 KiB
C
84 lines
2.9 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_CONST_ITERATOR_H
|
||
|
|
|
||
|
|
namespace ircd {
|
||
|
|
namespace db {
|
||
|
|
|
||
|
|
struct column::const_iterator
|
||
|
|
{
|
||
|
|
struct state;
|
||
|
|
|
||
|
|
using key_type = string_view;
|
||
|
|
using mapped_type = string_view;
|
||
|
|
using value_type = std::pair<key_type, mapped_type>;
|
||
|
|
using pointer = value_type *;
|
||
|
|
using reference = value_type &;
|
||
|
|
using difference_type = size_t;
|
||
|
|
using iterator_category = std::bidirectional_iterator_tag;
|
||
|
|
|
||
|
|
private:
|
||
|
|
gopts opts;
|
||
|
|
database::column *c;
|
||
|
|
std::unique_ptr<rocksdb::Iterator> it;
|
||
|
|
mutable value_type val;
|
||
|
|
|
||
|
|
friend class column;
|
||
|
|
const_iterator(database::column &, std::unique_ptr<rocksdb::Iterator> &&, gopts = {});
|
||
|
|
|
||
|
|
public:
|
||
|
|
operator const database::column &() const { return *c; }
|
||
|
|
operator const database::snapshot &() const { return opts.snapshot; }
|
||
|
|
explicit operator const gopts &() const { return opts; }
|
||
|
|
|
||
|
|
operator database::column &() { return *c; }
|
||
|
|
explicit operator database::snapshot &() { return opts.snapshot; }
|
||
|
|
|
||
|
|
operator bool() const;
|
||
|
|
bool operator!() const;
|
||
|
|
bool operator<(const const_iterator &) const;
|
||
|
|
bool operator>(const const_iterator &) const;
|
||
|
|
bool operator==(const const_iterator &) const;
|
||
|
|
bool operator!=(const const_iterator &) const;
|
||
|
|
bool operator<=(const const_iterator &) const;
|
||
|
|
bool operator>=(const const_iterator &) const;
|
||
|
|
|
||
|
|
const value_type *operator->() const;
|
||
|
|
const value_type &operator*() const;
|
||
|
|
|
||
|
|
const_iterator &operator++();
|
||
|
|
const_iterator &operator--();
|
||
|
|
|
||
|
|
const_iterator();
|
||
|
|
const_iterator(const_iterator &&) noexcept;
|
||
|
|
const_iterator &operator=(const_iterator &&) noexcept;
|
||
|
|
~const_iterator() noexcept;
|
||
|
|
|
||
|
|
template<class pos> friend void seek(column::const_iterator &, const pos &);
|
||
|
|
friend void seek(column::const_iterator &, const string_view &key);
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace db
|
||
|
|
} // namespace ircd
|