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
43static void
44memory_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. */
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