1 /*
2 * have_memmv - Determine if we have memmove()
3 *
4 * Copyright (C) 1999,2021 Landon Curt Noll
5 *
6 * Calc is open software; you can redistribute it and/or modify it under
7 * the terms of the version 2.1 of the GNU Lesser General Public License
8 * as published by the Free Software Foundation.
9 *
10 * Calc is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
13 * Public License for more details.
14 *
15 * A copy of version 2.1 of the GNU Lesser General Public License is
16 * distributed with calc under the filename COPYING-LGPL. You should have
17 * received a copy with calc; if not, write to Free Software Foundation, Inc.
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 *
20 * Under source code control: 1997/04/16 02:02:34
21 * File existed as early as: 1997
22 *
23 * chongo <was here> /\oo/\ http://www.isthe.com/chongo/
24 * Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
25 */
26
27 /*
28 * usage:
29 * have_memmv
30 *
31 * Not all systems with memcpy() have memmove() functions, so this may not
32 * compile on your system.
33 *
34 * This prog outputs several defines:
35 *
36 * HAVE_MEMMOVE
37 * defined ==> use memmove()
38 * undefined ==> use internal slow memmove() instead
39 */
40
41 #include <stdio.h>
42 #include "have_string.h"
43 #ifdef HAVE_STRING_H
44 # include <string.h>
45 #endif
46
47
48 #include "banned.h" /* include after system header <> includes */
49
50
51 #define MOVELEN 3
52
53 char src[] = "chongo was here";
54 char dest[MOVELEN+1];
55
56 int
main(void)57 main(void)
58 {
59 #if defined(HAVE_NO_MEMMOVE)
60
61 printf("#undef HAVE_MEMMOVE /* no */\n");
62
63 #else /* HAVE_NO_MEMMOVE */
64
65 (void) memmove(dest, src, MOVELEN);
66
67 printf("#define HAVE_MEMMOVE /* yes */\n");
68
69 #endif /* HAVE_NO_MEMMOVE */
70
71 /* exit(0); */
72 return 0;
73 }
74