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726f6388 JA |
1 | /* xmalloc.c -- safe versions of malloc and realloc */ |
2 | ||
b80f6443 | 3 | /* Copyright (C) 1991-2003 Free Software Foundation, Inc. |
726f6388 JA |
4 | |
5 | This file is part of GNU Readline, a library for reading lines | |
6 | of text with interactive input and history editing. | |
7 | ||
3185942a JA |
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. | |
726f6388 | 12 | |
3185942a JA |
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. | |
726f6388 JA |
17 | |
18 | You should have received a copy of the GNU General Public License | |
3185942a JA |
19 | along with Readline. If not, see <http://www.gnu.org/licenses/>. |
20 | */ | |
726f6388 | 21 | |
ccc6cda3 JA |
22 | #if defined (HAVE_CONFIG_H) |
23 | #include <config.h> | |
24 | #endif | |
25 | ||
726f6388 JA |
26 | #include <stdio.h> |
27 | ||
28 | #if defined (HAVE_STDLIB_H) | |
29 | # include <stdlib.h> | |
30 | #else | |
31 | # include "ansi_stdlib.h" | |
32 | #endif /* HAVE_STDLIB_H */ | |
33 | ||
f73dda09 JA |
34 | /* Generic pointer type. */ |
35 | #ifndef PTR_T | |
36 | ||
37 | #if defined (__STDC__) | |
38 | # define PTR_T void * | |
39 | #else | |
40 | # define PTR_T char * | |
41 | #endif | |
42 | ||
43 | #endif /* PTR_T */ | |
726f6388 JA |
44 | |
45 | /* **************************************************************** */ | |
46 | /* */ | |
47 | /* Memory Allocation and Deallocation. */ | |
48 | /* */ | |
49 | /* **************************************************************** */ | |
50 | ||
f73dda09 JA |
51 | static void |
52 | memory_error_and_abort (fname) | |
53 | char *fname; | |
54 | { | |
55 | fprintf (stderr, "%s: out of virtual memory\n", fname); | |
56 | exit (2); | |
57 | } | |
58 | ||
726f6388 JA |
59 | /* Return a pointer to free()able block of memory large enough |
60 | to hold BYTES number of bytes. If the memory cannot be allocated, | |
61 | print an error message and abort. */ | |
f73dda09 | 62 | PTR_T |
726f6388 | 63 | xmalloc (bytes) |
f73dda09 | 64 | size_t bytes; |
726f6388 | 65 | { |
f73dda09 | 66 | PTR_T temp; |
726f6388 | 67 | |
f73dda09 | 68 | temp = malloc (bytes); |
ccc6cda3 | 69 | if (temp == 0) |
726f6388 JA |
70 | memory_error_and_abort ("xmalloc"); |
71 | return (temp); | |
72 | } | |
73 | ||
f73dda09 | 74 | PTR_T |
726f6388 | 75 | xrealloc (pointer, bytes) |
f73dda09 JA |
76 | PTR_T pointer; |
77 | size_t bytes; | |
726f6388 | 78 | { |
f73dda09 | 79 | PTR_T temp; |
726f6388 | 80 | |
f73dda09 | 81 | temp = pointer ? realloc (pointer, bytes) : malloc (bytes); |
726f6388 | 82 | |
ccc6cda3 | 83 | if (temp == 0) |
726f6388 JA |
84 | memory_error_and_abort ("xrealloc"); |
85 | return (temp); | |
86 | } | |
87 | ||
ccc6cda3 JA |
88 | void |
89 | xfree (string) | |
f73dda09 | 90 | PTR_T string; |
ccc6cda3 JA |
91 | { |
92 | if (string) | |
93 | free (string); | |
726f6388 | 94 | } |