kc3-lang/gnulib/lib/stdckdint.in.h

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• Hash : e331531a
  Author :
  Date : 2025-05-22T19:33:05
  

  stdckdint-h: Don't generate header if it is not needed.
  
  Suggested by Paul Eggert in:
  <https://lists.gnu.org/archive/html/bug-gnulib/2025-05/msg00216.html>.
  
  * m4/stdckdint_h.m4: New file.
  * modules/stdckdint-h (Files): Add m4/stdckdint_h.m4.
  (configure.ac): Remove checks and just invoke gl_STDCKDINT_H.
  (Makefile.am): Replace variables set by ./configure.
  * lib/stdckdint.in.h: Include the compilers header if it exists.  Add
  comment mentioning expected future standardization in C++26.
  (ckd_add, ckd_sub, ckd_mul): Only define if the compilers definitions do
  not work.
  

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• lib/stdckdint.in.h

• /* stdckdint.h -- checked integer arithmetic
  
     Copyright 2022-2025 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify it
     under the terms of the GNU Lesser General Public License as published
     by the Free Software Foundation; either version 2.1 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #if __GNUC__ >= 3
  @PRAGMA_SYSTEM_HEADER@
  #endif
  @PRAGMA_COLUMNS@
  
  #ifndef _@GUARD_PREFIX@_STDCKDINT_H
  
  /* The include_next requires a split double-inclusion guard.  */
  #if defined __cplusplus ? @HAVE_CXX_STDCKDINT_H@ : @HAVE_C_STDCKDINT_H@
  # @INCLUDE_NEXT@ @NEXT_STDCKDINT_H@
  #endif
  
  #ifndef _@GUARD_PREFIX@_STDCKDINT_H
  #define _@GUARD_PREFIX@_STDCKDINT_H
  
  /* Do nothing but include the system header if it works properly.  */
  # if defined __cplusplus ? !@HAVE_WORKING_CXX_STDCKDINT_H@ : !@HAVE_WORKING_C_STDCKDINT_H@
  
  /* Avoid redefining macros.  */
  #  undef ckd_add
  #  undef ckd_sub
  #  undef ckd_mul
  
  #  include "intprops-internal.h"
  
  /* Store into *R the low-order bits of A + B, A - B, A * B, respectively.
     Return 1 if the result overflows, 0 otherwise.
     A, B, and *R can have any integer type other than char, bool, a
     bit-precise integer type, or an enumeration type.
  
     These are like the standard macros introduced in C23, except that
     arguments should not have side effects.  The C++26 standard is
     expected to add this header and it's macros.  */
  
  #  define ckd_add(r, a, b) ((bool) _GL_INT_ADD_WRAPV (a, b, r))
  #  define ckd_sub(r, a, b) ((bool) _GL_INT_SUBTRACT_WRAPV (a, b, r))
  #  define ckd_mul(r, a, b) ((bool) _GL_INT_MULTIPLY_WRAPV (a, b, r))
  
  # endif /* defined __cplusplus ? @HAVE_WORKING_CXX_STDCKDINT_H@ : @HAVE_WORKING_C_STDCKDINT_H@ */
  #endif /* _@GUARD_PREFIX@_STDCKDINT_H */
  #endif /* _@GUARD_PREFIX@_STDCKDINT_H */
  

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