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  02110-1335  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 
43 static void
memory_error_and_abort(fname)44 memory_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. */
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