gl/realloc.c

   1 /* realloc() function that is glibc compatible.
   2
   3    Copyright (C) 1997, 2003, 2004, 2006 Free Software Foundation, Inc.
   4
   5    This program 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 2, or (at your option)
   8    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 General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 /* written by Jim Meyering */
  20
  21 #include <config.h>
  22 #undef realloc
  23
  24 #include <stdlib.h>
  25
  26 /* Change the size of an allocated block of memory P to N bytes,
  27    with error checking.  If N is zero, change it to 1.  If P is NULL,
  28    use malloc.  */
  29
  30 void *
  31 rpl_realloc (void *p, size_t n)
  32 {
  33   if (n == 0)
  34     {
  35       n = 1;
  36
  37       /* In theory realloc might fail, so don't rely on it to free.  */
  38       free (p);
  39       p = NULL;
  40     }
  41
  42   if (p == NULL)
  43     return malloc (n);
  44   return realloc (p, n);
  45 }