| 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 | |
| 34 | #include <stdio.h> |
| 35 | |
| 36 | #include "xmalloc.h" |
| 37 | #include "readline.h" |
| 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 | { |
| 51 | /* Leak a bit. */ |
| 52 | if (RL_ISSTATE(RL_STATE_SIGHANDLER)) |
| 53 | return; |
| 54 | |
| 55 | if (string) |
| 56 | free (string); |
| 57 | } |