File: xfree.c

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/* xfree.c -- safe version of free that ignores attempts to free NUL */

/* Copyright (C) 1991-2010 Free Software Foundation, Inc.

   This file is part of the GNU Readline Library (Readline), a library
   for reading lines of text with interactive input and history editing.      

   Readline 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 3 of the License, or
   (at your option) any later version.

   Readline 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 Readline.  If not, see <http://www.gnu.org/licenses/>.
*/

#define READLINE_LIBRARY

#if defined (HAVE_CONFIG_H)
#include <config.h>
#endif

#if defined (HAVE_STDLIB_H)
#  include <stdlib.h>
#else
#  include "ansi_stdlib.h"
#endif /* HAVE_STDLIB_H */

#include <stdio.h>

#include "xmalloc.h"
#include "readline.h"

/* **************************************************************** */
/*								    */
/*		   Memory Deallocation.				    */
/*								    */
/* **************************************************************** */

/* Use this as the function to call when adding unwind protects so we
   don't need to know what free() returns. */
void
xfree (string)
     PTR_T string;
{
  /* Leak a bit.  */
  if (RL_ISSTATE(RL_STATE_SIGHANDLER))
    return;

  if (string)
    free (string);
}