1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1992, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char rcsid[] = "$OpenBSD: divrem.c,v 1.3 2003/06/02 20:18:36 millert Exp $";
#endif /* not lint */
#include <stdio.h>
main()
{
union { long long q; unsigned long v[2]; } a, b, q, r;
char buf[300];
extern long long __qdivrem(unsigned long long, unsigned long long,
unsigned long long *);
for (;;) {
printf("> ");
if (fgets(buf, sizeof buf, stdin) == NULL)
break;
if (sscanf(buf, "%lu:%lu %lu:%lu",
&a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4 &&
sscanf(buf, "0x%lx:%lx 0x%lx:%lx",
&a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4) {
printf("eh?\n");
continue;
}
q.q = __qdivrem(a.q, b.q, &r.q);
printf("%lx:%lx /%% %lx:%lx => q=%lx:%lx r=%lx:%lx\n",
a.v[0], a.v[1], b.v[0], b.v[1],
q.v[0], q.v[1], r.v[0], r.v[1]);
printf(" = %lX%08lX / %lX%08lX => %lX%08lX\n\
= %lX%08lX %% %lX%08lX => %lX%08lX\n",
a.v[0], a.v[1], b.v[0], b.v[1], q.v[0], q.v[1],
a.v[0], a.v[1], b.v[0], b.v[1], r.v[0], r.v[1]);
}
exit(0);
}
|
