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
memory_error_and_abort(fname)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
xmalloc(bytes)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
xrealloc(pointer,bytes)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
xfree(string)83 xfree (string)
84 PTR_T string;
85 {
86 if (string)
87 free (string);
88 }
89