gl/stdckdint.in.h

   1 /* stdckdint.h -- checked integer arithmetic
   2
   3    Copyright 2022-2023 Free Software Foundation, Inc.
   4
   5    This program is free software: you can redistribute it and/or modify it
   6    under the terms of the GNU Lesser General Public License as published
   7    by the Free Software Foundation; either version 2.1 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _GL_STDCKDINT_H
  19 #define _GL_STDCKDINT_H
  20
  21 #include "intprops-internal.h"
  22
  23 /* Store into *R the low-order bits of A + B, A - B, A * B, respectively.
  24    Return 1 if the result overflows, 0 otherwise.
  25    A, B, and *R can have any integer type other than char, bool, a
  26    bit-precise integer type, or an enumeration type.
  27
  28    These are like the standard macros introduced in C23, except that
  29    arguments should not have side effects.  */
  30
  31 #define ckd_add(r, a, b) ((bool) _GL_INT_ADD_WRAPV (a, b, r))
  32 #define ckd_sub(r, a, b) ((bool) _GL_INT_SUBTRACT_WRAPV (a, b, r))
  33 #define ckd_mul(r, a, b) ((bool) _GL_INT_MULTIPLY_WRAPV (a, b, r))
  34
  35 #endif /* _GL_STDCKDINT_H */