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/*- * Copyright (c) 2023 Dag-Erling Smørgrav * * SPDX-License-Identifier: BSD-2-Clause */ #ifndef __STDC_VERSION_STDCKDINT_H__ #define __STDC_VERSION_STDCKDINT_H__ 202311L #include <sys/cdefs.h> #if __BSD_VISIBLE || __ISO_C_VISIBLE >= 2023 #if __GNUC_PREREQ__(5, 1) || __has_builtin(__builtin_add_overflow) #define ckd_add(result, a, b) \ (_Bool)__builtin_add_overflow((a), (b), (result)) #else #define ckd_add(result, a, b) \ _Static_assert(0, "checked addition not supported") #endif #if __GNUC_PREREQ__(5, 1) || __has_builtin(__builtin_sub_overflow) #define ckd_sub(result, a, b) \ (_Bool)__builtin_sub_overflow((a), (b), (result)) #else #define ckd_sub(result, a, b) \ _Static_assert(0, "checked subtraction not supported") #endif #if __GNUC_PREREQ__(5, 1) || __has_builtin(__builtin_mul_overflow) #define ckd_mul(result, a, b) \ (_Bool)__builtin_mul_overflow((a), (b), (result)) #else #define ckd_mul(result, a, b) \ _Static_assert(0, "checked multiplication not supported") #endif #endif #endif