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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
21#define READLINE_LIBRARY
22
23#if defined (HAVE_CONFIG_H)
24#include "config_readline.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
43static void
44memory_error_and_abort (fname)
45 const 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. */
54PTR_T
55xmalloc (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
66PTR_T
67xrealloc (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. */
82void
83xfree (string)
84 PTR_T string;
85{
86 if (string)
87 free (string);
88}
89