| 1 | /* stdckdint.h -- checked integer arithmetic
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| 2 |
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| 3 | Copyright 2022 Free Software Foundation, Inc.
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| 4 |
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| 5 | This program is free software: you can redistribute it and/or modify it
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| 6 | under the terms of the GNU Lesser General Public License as published
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| 7 | by the Free Software Foundation; either version 2.1 of the License, or
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| 8 | (at your option) any later version.
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| 9 |
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| 10 | This program is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU Lesser General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU Lesser General Public License
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| 16 | along with this program. If not, see <https://www.gnu.org/licenses/>. */
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| 17 |
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| 18 | #ifndef _GL_STDCKDINT_H
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| 19 | #define _GL_STDCKDINT_H
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| 20 |
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| 21 | #include "intprops-internal.h"
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| 22 |
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| 23 | /* Store into *R the low-order bits of A + B, A - B, A * B, respectively.
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| 24 | Return 1 if the result overflows, 0 otherwise.
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| 25 | A, B, and *R can have any integer type other than char, bool, a
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| 26 | bit-precise integer type, or an enumeration type.
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| 27 |
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| 28 | These are like the standard macros introduced in C23, except that
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| 29 | arguments should not have side effects. */
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| 30 |
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| 31 | #define ckd_add(r, a, b) ((bool) _GL_INT_ADD_WRAPV (a, b, r))
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| 32 | #define ckd_sub(r, a, b) ((bool) _GL_INT_SUBTRACT_WRAPV (a, b, r))
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| 33 | #define ckd_mul(r, a, b) ((bool) _GL_INT_MULTIPLY_WRAPV (a, b, r))
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| 34 |
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| 35 | #endif /* _GL_STDCKDINT_H */
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