MySQL 9.5.0
Source Code Documentation
hash.h
Go to the documentation of this file.
1/*
2 Copyright (c) 2025, Oracle and/or its affiliates.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License, version 2.0,
6 as published by the Free Software Foundation.
7
8 This program is designed to work with certain software (including
9 but not limited to OpenSSL) that is licensed under separate terms,
10 as designated in a particular file or component or in included license
11 documentation. The authors of MySQL hereby grant you an additional
12 permission to link the program and your derivative works with the
13 separately licensed software that they have either included with
14 the program or referenced in the documentation.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License, version 2.0, for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24*/
25
26#ifndef SQL_HASH_INCLUDED
27#define SQL_HASH_INCLUDED
28
29#include <cstdint>
30#include <string>
31
32inline constexpr uint64_t kNullStrHash =
33 3424785146145211351ULL; // value of HashCString("X");
34
35uint64_t HashCString(const char *str);
36
37uint64_t HashString(std::string_view str);
38
39template <typename T>
40uint64_t HashNumber(T num);
41
42uint64_t CombineNonCommutativeSigs(uint64_t h1, uint64_t h2);
43
44uint64_t CombineCommutativeSigs(uint64_t h1, uint64_t h2);
45
46#endif /* SQL_HASH_INCLUDED */
uint64_t CombineNonCommutativeSigs(uint64_t h1, uint64_t h2)
Non-commutative hash combination NULL hashes (i.e.
Definition: hash.cc:61
uint64_t CombineCommutativeSigs(uint64_t h1, uint64_t h2)
Commutative hash combination NULL hashes (i.e.
Definition: hash.cc:71
uint64_t HashString(std::string_view str)
Definition: hash.cc:40
constexpr uint64_t kNullStrHash
Definition: hash.h:32
uint64_t HashCString(const char *str)
Definition: hash.cc:33
uint64_t HashNumber(T num)
Definition: hash.cc:45
#define T
Definition: jit_executor_value.cc:373
std::string str(const mysqlrouter::ConfigGenerator::Options::Endpoint &ep)
Definition: config_generator.cc:1078