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37 lines
1.4 KiB
C
37 lines
1.4 KiB
C
/* stdckdint.h -- checked integer arithmetic
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Copyright 2022 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#ifndef _GL_STDCKDINT_H
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#define _GL_STDCKDINT_H
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#include "intprops-internal.h"
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#include <stdbool.h>
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/* Store into *R the low-order bits of A + B, A - B, A * B, respectively.
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Return 1 if the result overflows, 0 otherwise.
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A, B, and *R can have any integer type other than char, bool, a
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bit-precise integer type, or an enumeration type.
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These are like the standard macros introduced in C23, except that
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arguments should not have side effects. */
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#define ckd_add(r, a, b) ((bool) _GL_INT_ADD_WRAPV (a, b, r))
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#define ckd_sub(r, a, b) ((bool) _GL_INT_SUBTRACT_WRAPV (a, b, r))
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#define ckd_mul(r, a, b) ((bool) _GL_INT_MULTIPLY_WRAPV (a, b, r))
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#endif /* _GL_STDCKDINT_H */
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