1/* xmalloc.c -- safe versions of malloc and realloc */
2
3/* Copyright (C) 1991-2009 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#include <stdio.h>
29
30#if defined (HAVE_STDLIB_H)
31#  include <stdlib.h>
32#else
33#  include "ansi_stdlib.h"
34#endif /* HAVE_STDLIB_H */
35
36#include "xmalloc.h"
37
38/* **************************************************************** */
39/*								    */
40/*		   Memory Allocation and Deallocation.		    */
41/*								    */
42/* **************************************************************** */
43
44static void
45memory_error_and_abort (fname)
46     char *fname;
47{
48  fprintf (stderr, "%s: out of virtual memory\n", fname);
49  exit (2);
50}
51
52/* Return a pointer to free()able block of memory large enough
53   to hold BYTES number of bytes.  If the memory cannot be allocated,
54   print an error message and abort. */
55PTR_T
56xmalloc (bytes)
57     size_t bytes;
58{
59  PTR_T temp;
60
61  temp = malloc (bytes);
62  if (temp == 0)
63    memory_error_and_abort ("xmalloc");
64  return (temp);
65}
66
67PTR_T
68xrealloc (pointer, bytes)
69     PTR_T pointer;
70     size_t bytes;
71{
72  PTR_T temp;
73
74  temp = pointer ? realloc (pointer, bytes) : malloc (bytes);
75
76  if (temp == 0)
77    memory_error_and_abort ("xrealloc");
78  return (temp);
79}
80
81/* Use this as the function to call when adding unwind protects so we
82   don't need to know what free() returns. */
83void
84xfree (string)
85     PTR_T string;
86{
87  if (string)
88    free (string);
89}
90