1/* Zero byte detection, boolean. Generic C version.
2 Copyright (C) 2023-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#ifndef _STRING_FZB_H
20#define _STRING_FZB_H 1
21
22#include <endian.h>
23#include <string-fza.h>
24
25/* Determine if any byte within X is zero. This is a pure boolean test. */
26
27static __always_inline _Bool
28has_zero (op_t x)
29{
30 return find_zero_low (x) != 0;
31}
32
33/* Likewise, but for byte equality between X1 and X2. */
34
35static __always_inline _Bool
36has_eq (op_t x1, op_t x2)
37{
38 return find_eq_low (x1, x2) != 0;
39}
40
41/* Likewise, but for zeros in X1 and equal bytes between X1 and X2. */
42
43static __always_inline _Bool
44has_zero_eq (op_t x1, op_t x2)
45{
46 return find_zero_eq_low (x1, x2);
47}
48
49#endif /* _STRING_FZB_H */
50

source code of glibc/sysdeps/generic/string-fzb.h