lib/realloc.c

   1 /* realloc() function that is glibc compatible.
   2    Copyright (C) 1997, 2003, 2004 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 /* written by Jim Meyering */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23 #undef realloc
  24
  25 #include <stdlib.h>
  26
  27 /* Change the size of an allocated block of memory P to N bytes,
  28    with error checking.  If N is zero, change it to 1.  If P is NULL,
  29    use malloc.  */
  30
  31 void *
  32 rpl_realloc (void *p, size_t n)
  33 {
  34   if (n == 0)
  35     {
  36       n = 1;
  37
  38       /* In theory realloc might fail, so don't rely on it to free.  */
  39       free (p);
  40       p = NULL;
  41     }
  42
  43   if (p == NULL)
  44     return malloc (n);
  45   return realloc (p, n);
  46 }