jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2021, Jan de Visser <jan@de-visser.net>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#pragma once
8
9#include <AK/NonnullRefPtr.h>
10#include <LibSQL/Forward.h>
11#include <LibSQL/Meta.h>
12#include <LibSQL/Tuple.h>
13#include <LibSQL/Value.h>
14
15namespace SQL {
16
17/**
18 * A Tuple is an element of a sequential-access persistence data structure
19 * like a flat table. Like a key it has a definition for all its parts,
20 * but unlike a key this definition is not optional.
21 *
22 * FIXME Tuples should logically belong to a TupleStore object, but right now
23 * they stand by themselves; they contain a row's worth of data and a pointer
24 * to the next Tuple.
25 */
26class Row : public Tuple {
27public:
28 explicit Row(NonnullRefPtr<TableDef>, u32 pointer = 0);
29 virtual ~Row() override = default;
30
31 [[nodiscard]] u32 next_pointer() const { return m_next_pointer; }
32 void set_next_pointer(u32 ptr) { m_next_pointer = ptr; }
33
34 TableDef const& table() const { return *m_table; }
35 TableDef& table() { return *m_table; }
36
37 [[nodiscard]] virtual size_t length() const override { return Tuple::length() + sizeof(u32); }
38 virtual void serialize(Serializer&) const override;
39 virtual void deserialize(Serializer&) override;
40
41private:
42 NonnullRefPtr<TableDef> m_table;
43 u32 m_next_pointer { 0 };
44};
45
46}