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cc88a640 JK |
1 | /* xfree.c -- safe version of free that ignores attempts to free NUL */ |
2 | ||
3 | /* Copyright (C) 1991-2010 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 | ||
0d1b0333 JK |
34 | #include <stdio.h> |
35 | ||
cc88a640 | 36 | #include "xmalloc.h" |
0d1b0333 | 37 | #include "readline.h" |
cc88a640 JK |
38 | |
39 | /* **************************************************************** */ | |
40 | /* */ | |
41 | /* Memory Deallocation. */ | |
42 | /* */ | |
43 | /* **************************************************************** */ | |
44 | ||
45 | /* Use this as the function to call when adding unwind protects so we | |
46 | don't need to know what free() returns. */ | |
47 | void | |
48 | xfree (string) | |
49 | PTR_T string; | |
50 | { | |
0d1b0333 JK |
51 | /* Leak a bit. */ |
52 | if (RL_ISSTATE(RL_STATE_SIGHANDLER)) | |
53 | return; | |
54 | ||
cc88a640 JK |
55 | if (string) |
56 | free (string); | |
57 | } |