kc3-lang/gnulib/lib/reallocarray.c

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• Hash : d884e6fc
  Author :
  Date : 2024-11-03T22:41:41
  

  realloc-posix: realloc (..., 0) now returns nonnull
  
  * lib/realloc.c (rpl_realloc): Simplify and tune by using
  HAVE_REALLOC_0_NONNULL and HAVE_MALLOC_PTRDIFF, and
  by having just one call to realloc instead of two.
  * lib/reallocarray.c (reallocarray): Simplify and tune
  by delegating the zero case to the revised realloc.
  * m4/eealloc.m4 (_AC_FUNC_REALLOC_IF): Since only eealloc uses
  this macro now, move its definition here ...
  * m4/realloc.m4: ... from here.
  (gl_FUNC_REALLOC_0_NONNULL): Also check that realloc (p, 0)
  returns nonnull.  Require gl_FUNC_REALLOC_POSIX.
  Define HAVE_REALLOC_0_NONNULL.
  * m4/reallocarray.m4 (gl_FUNC_REALLOCARRAY):
  Also replace reallocarray if it returns a null pointer for size zero.
  * modules/eealloc (Files): Remove m4/realloc.m4.
  * modules/realloc-posix (Depends-on): Add extensions-aix.
  * modules/reallocarray (Files): Add m4/realloc.m4.
  

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• lib/reallocarray.c

• /* reallocarray function that is glibc compatible.
  
     Copyright (C) 2017-2024 Free Software Foundation, Inc.
  
     This file 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 file 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/>.  */
  
  /* written by Darshit Shah */
  
  #include <config.h>
  
  #include <stdckdint.h>
  #include <stdlib.h>
  #include <errno.h>
  
  void *
  reallocarray (void *ptr, size_t nmemb, size_t size)
  {
    size_t nbytes;
    if (ckd_mul (&nbytes, nmemb, size))
      {
        errno = ENOMEM;
        return NULL;
      }
  
    /* Call realloc, setting errno to ENOMEM on failure.  */
    return realloc (ptr, nbytes);
  }
  

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