realloc.c

来自「制作2.6内核的CLFS时 使用的diffutils-2.8.7.tar.gz包」· C语言 代码 · 共 40 行

/* Work around bug on some systems where realloc (NULL, 0) fails.
   Copyright (C) 1997, 2003 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* written by Jim Meyering */

#if HAVE_CONFIG_H
# include <config.h>
#endif
#undef realloc

#include <stdlib.h>

/* Change the size of an allocated block of memory P to N bytes,
   with error checking.  If N is zero, change it to 1.  If P is NULL,
   use malloc.  */

void *
rpl_realloc (void *p, size_t n)
{
  if (n == 0)
    n = 1;
  if (p == 0)
    return malloc (n);
  return realloc (p, n);
}