1 /* stdckdint.h -- checked integer arithmetic
2
3 Copyright 2022-2023 Free Software Foundation, Inc.
4
5 This program is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Lesser General Public License as published
7 by the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
9
10 This program 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
13 GNU Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
17
18 #ifndef _GL_STDCKDINT_H
19 #define _GL_STDCKDINT_H
20
21 #include "intprops-internal.h"
22
23 /* Store into *R the low-order bits of A + B, A - B, A * B, respectively.
24 Return 1 if the result overflows, 0 otherwise.
25 A, B, and *R can have any integer type other than char, bool, a
26 bit-precise integer type, or an enumeration type.
27
28 These are like the standard macros introduced in C23, except that
29 arguments should not have side effects. */
30
31 #define ckd_add(r, a, b) ((bool) _GL_INT_ADD_WRAPV (a, b, r))
32 #define ckd_sub(r, a, b) ((bool) _GL_INT_SUBTRACT_WRAPV (a, b, r))
33 #define ckd_mul(r, a, b) ((bool) _GL_INT_MULTIPLY_WRAPV (a, b, r))
34
35 #endif /* _GL_STDCKDINT_H */