1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/*****************************************************************************
Copyright (c) 1994, 2013, Oracle and/or its affiliates. All Rights Reserved.
Copyright (c) 2019, 2020, MariaDB Corporation.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
*****************************************************************************/
/**************************************************************//**
@file include/ut0byte.ic
Utilities for byte operations
Created 5/30/1994 Heikki Tuuri
*******************************************************************/
/*******************************************************//**
Creates a 64-bit integer out of two 32-bit integers.
@return created integer */
UNIV_INLINE
ib_uint64_t
ut_ull_create(
/*==========*/
ulint high, /*!< in: high-order 32 bits */
ulint low) /*!< in: low-order 32 bits */
{
ut_ad(high <= ULINT32_MASK);
ut_ad(low <= ULINT32_MASK);
return(((ib_uint64_t) high) << 32 | low);
}
/********************************************************//**
Rounds a 64-bit integer downward to a multiple of a power of 2.
@return rounded value */
UNIV_INLINE
ib_uint64_t
ut_uint64_align_down(
/*=================*/
ib_uint64_t n, /*!< in: number to be rounded */
ulint align_no) /*!< in: align by this number
which must be a power of 2 */
{
ut_ad(align_no > 0);
ut_ad(ut_is_2pow(align_no));
return(n & ~((ib_uint64_t) align_no - 1));
}
/********************************************************//**
Rounds ib_uint64_t upward to a multiple of a power of 2.
@return rounded value */
UNIV_INLINE
ib_uint64_t
ut_uint64_align_up(
/*===============*/
ib_uint64_t n, /*!< in: number to be rounded */
ulint align_no) /*!< in: align by this number
which must be a power of 2 */
{
ib_uint64_t align_1 = (ib_uint64_t) align_no - 1;
ut_ad(align_no > 0);
ut_ad(ut_is_2pow(align_no));
return((n + align_1) & ~align_1);
}
/*****************************************************************//**
Gets the nth bit of a ulint.
@return TRUE if nth bit is 1; 0th bit is defined to be the least significant */
UNIV_INLINE
ibool
ut_bit_get_nth(
/*===========*/
ulint a, /*!< in: ulint */
ulint n) /*!< in: nth bit requested */
{
ut_ad(n < 8 * sizeof(ulint));
return(1 & (a >> n));
}
|
