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3c052bec12
by removing the cast to _Bool. The _Bool type is not defined for C++,
and the specification from the gcc info doc states that the return
type of the __builtin_{add,sub,mul}_overflow() is bool already.
This is done instead of including stdbool.h to avoid namespace
pollution, since defining bool from stdckdint.h simingly is not
sanctioned by ISO/IEC 9899:2024.
PR: 290299
Reviewed by: des
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D53149
40 lines
1 KiB
C
40 lines
1 KiB
C
/*-
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* Copyright (c) 2023 Dag-Erling Smørgrav
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#ifndef __STDC_VERSION_STDCKDINT_H__
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#define __STDC_VERSION_STDCKDINT_H__ 202311L
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#include <sys/cdefs.h>
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#if __BSD_VISIBLE || __ISO_C_VISIBLE >= 2023
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#if __GNUC_PREREQ__(5, 1) || __has_builtin(__builtin_add_overflow)
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#define ckd_add(result, a, b) \
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__builtin_add_overflow((a), (b), (result))
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#else
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#define ckd_add(result, a, b) \
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_Static_assert(0, "checked addition not supported")
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#endif
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#if __GNUC_PREREQ__(5, 1) || __has_builtin(__builtin_sub_overflow)
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#define ckd_sub(result, a, b) \
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__builtin_sub_overflow((a), (b), (result))
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#else
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#define ckd_sub(result, a, b) \
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_Static_assert(0, "checked subtraction not supported")
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#endif
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#if __GNUC_PREREQ__(5, 1) || __has_builtin(__builtin_mul_overflow)
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#define ckd_mul(result, a, b) \
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__builtin_mul_overflow((a), (b), (result))
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#else
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#define ckd_mul(result, a, b) \
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_Static_assert(0, "checked multiplication not supported")
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#endif
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#endif
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#endif
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