| 1 | /*- |
| 2 | * Copyright (c) 2023 Dag-Erling Smørgrav |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-2-Clause |
| 5 | */ |
| 6 | |
| 7 | #ifndef __STDC_VERSION_STDCKDINT_H__ |
| 8 | #define __STDC_VERSION_STDCKDINT_H__ 202311L |
| 9 | |
| 10 | #include <sys/cdefs.h> |
| 11 | |
| 12 | #if __BSD_VISIBLE || __ISO_C_VISIBLE >= 2023 |
| 13 | |
| 14 | #if __GNUC_PREREQ__(5, 1) || __has_builtin(__builtin_add_overflow) |
| 15 | #define ckd_add(result, a, b) \ |
| 16 | __builtin_add_overflow((a), (b), (result)) |
| 17 | #else |
| 18 | #define ckd_add(result, a, b) \ |
| 19 | _Static_assert(0, "checked addition not supported") |
| 20 | #endif |
| 21 | |
| 22 | #if __GNUC_PREREQ__(5, 1) || __has_builtin(__builtin_sub_overflow) |
| 23 | #define ckd_sub(result, a, b) \ |
| 24 | __builtin_sub_overflow((a), (b), (result)) |
| 25 | #else |
| 26 | #define ckd_sub(result, a, b) \ |
| 27 | _Static_assert(0, "checked subtraction not supported") |
| 28 | #endif |
| 29 | |
| 30 | #if __GNUC_PREREQ__(5, 1) || __has_builtin(__builtin_mul_overflow) |
| 31 | #define ckd_mul(result, a, b) \ |
| 32 | __builtin_mul_overflow((a), (b), (result)) |
| 33 | #else |
| 34 | #define ckd_mul(result, a, b) \ |
| 35 | _Static_assert(0, "checked multiplication not supported") |
| 36 | #endif |
| 37 | |
| 38 | #endif |
| 39 | |
| 40 | #endif |