| 1 | /* xmalloc.c -- safe versions of malloc and realloc */ |
| 2 | |
| 3 | /* Copyright (C) 1991 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GNU Readline, a library for reading lines |
| 6 | of text with interactive input and history editing. |
| 7 | |
| 8 | Readline is free software; you can redistribute it and/or modify it |
| 9 | under the terms of the GNU General Public License as published by the |
| 10 | Free Software Foundation; either version 2, or (at your option) any |
| 11 | later version. |
| 12 | |
| 13 | Readline is distributed in the hope that it will be useful, but |
| 14 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with Readline; see the file COPYING. If not, write to the Free |
| 20 | Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
| 21 | #define READLINE_LIBRARY |
| 22 | |
| 23 | #if defined (HAVE_CONFIG_H) |
| 24 | #include <config.h> |
| 25 | #endif |
| 26 | |
| 27 | #include <stdio.h> |
| 28 | |
| 29 | #if defined (HAVE_STDLIB_H) |
| 30 | # include <stdlib.h> |
| 31 | #else |
| 32 | # include "ansi_stdlib.h" |
| 33 | #endif /* HAVE_STDLIB_H */ |
| 34 | |
| 35 | #include "xmalloc.h" |
| 36 | |
| 37 | /* **************************************************************** */ |
| 38 | /* */ |
| 39 | /* Memory Allocation and Deallocation. */ |
| 40 | /* */ |
| 41 | /* **************************************************************** */ |
| 42 | |
| 43 | static void |
| 44 | memory_error_and_abort (fname) |
| 45 | char *fname; |
| 46 | { |
| 47 | fprintf (stderr, "%s: out of virtual memory\n", fname); |
| 48 | exit (2); |
| 49 | } |
| 50 | |
| 51 | /* Return a pointer to free()able block of memory large enough |
| 52 | to hold BYTES number of bytes. If the memory cannot be allocated, |
| 53 | print an error message and abort. */ |
| 54 | PTR_T |
| 55 | xmalloc (bytes) |
| 56 | size_t bytes; |
| 57 | { |
| 58 | PTR_T temp; |
| 59 | |
| 60 | temp = malloc (bytes); |
| 61 | if (temp == 0) |
| 62 | memory_error_and_abort ("xmalloc"); |
| 63 | return (temp); |
| 64 | } |
| 65 | |
| 66 | PTR_T |
| 67 | xrealloc (pointer, bytes) |
| 68 | PTR_T pointer; |
| 69 | size_t bytes; |
| 70 | { |
| 71 | PTR_T temp; |
| 72 | |
| 73 | temp = pointer ? realloc (pointer, bytes) : malloc (bytes); |
| 74 | |
| 75 | if (temp == 0) |
| 76 | memory_error_and_abort ("xrealloc"); |
| 77 | return (temp); |
| 78 | } |
| 79 | |
| 80 | /* Use this as the function to call when adding unwind protects so we |
| 81 | don't need to know what free() returns. */ |
| 82 | void |
| 83 | xfree (string) |
| 84 | PTR_T string; |
| 85 | { |
| 86 | if (string) |
| 87 | free (string); |
| 88 | } |