gcc/ginclude/stdckdint.h

   1 /* Copyright (C) 2023-2024 Free Software Foundation, Inc.
   2
   3 This file is part of GCC.
   4
   5 GCC is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 3, or (at your option)
   8 any later version.
   9
  10 GCC 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 General Public License for more details.
  14
  15 Under Section 7 of GPL version 3, you are granted additional
  16 permissions described in the GCC Runtime Library Exception, version
  17 3.1, as published by the Free Software Foundation.
  18
  19 You should have received a copy of the GNU General Public License and
  20 a copy of the GCC Runtime Library Exception along with this program;
  21 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  22 <http://www.gnu.org/licenses/>.  */
  23
  24 /* ISO C23: 7.20 Checked Integer Arithmetic <stdckdint.h>.  */
  25
  26 #ifndef _STDCKDINT_H
  27 #define _STDCKDINT_H
  28
  29 #define __STDC_VERSION_STDCKDINT_H__ 202311L
  30
  31 #define ckd_add(r, a, b) ((_Bool) __builtin_add_overflow (a, b, r))
  32 #define ckd_sub(r, a, b) ((_Bool) __builtin_sub_overflow (a, b, r))
  33 #define ckd_mul(r, a, b) ((_Bool) __builtin_mul_overflow (a, b, r))
  34
  35 /* Allow for the C library to add its part to the header.  */
  36 #if !defined (_LIBC_STDCKDINT_H) && __has_include_next (<stdckdint.h>)
  37 # include_next <stdckdint.h>
  38 #endif
  39
  40 #endif /* stdckdint.h */