1 /* xfree.c -- safe version of free that ignores attempts to free NUL */
2
3 /* Copyright (C) 1991-2010,2017 Free Software Foundation, Inc.
4
5 This file is part of the GNU Readline Library (Readline), a library
6 for reading lines of text with interactive input and history editing.
7
8 Readline is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
12
13 Readline is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with Readline. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #define READLINE_LIBRARY
23
24 #if defined (HAVE_CONFIG_H)
25 #include <config.h>
26 #endif
27
28 #if defined (HAVE_STDLIB_H)
29 # include <stdlib.h>
30 #else
31 # include "ansi_stdlib.h"
32 #endif /* HAVE_STDLIB_H */
33
34 #include "xmalloc.h"
35
36 /* **************************************************************** */
37 /* */
38 /* Memory Deallocation. */
39 /* */
40 /* **************************************************************** */
41
42 /* Use this as the function to call when adding unwind protects so we
43 don't need to know what free() returns. */
44 void
xfree(PTR_T string)45 xfree (PTR_T string)
46 {
47 if (string)
48 free (string);
49 }
50