1 /*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <string.h>
28 #include <stand.h>
29
30 /*
31 * Display a region in traditional hexdump format.
32 */
33 void
hexdump(caddr_t region,size_t len)34 hexdump(caddr_t region, size_t len)
35 {
36 caddr_t line;
37 int x, c;
38 #ifdef HEXDUMP_PAGER
39 /* pager causes linking issues for some apps */
40 #define emit(fmt, args...) {sprintf(lbuf, fmt , ## args); pager_output(lbuf);}
41 char lbuf[80];
42
43 pager_open();
44 #else
45 #define emit(fmt, args...) printf(fmt, ## args)
46 #endif
47
48 for (line = region; line < (region + len); line += 16) {
49 emit("%08lx ", (long) line);
50
51 for (x = 0; x < 16; x++) {
52 if ((line + x) < (region + len)) {
53 emit("%02x ", *(uint8_t *)(line + x));
54 } else {
55 emit("-- ");
56 }
57 if (x == 7)
58 emit(" ");
59 }
60 emit(" |");
61 for (x = 0; x < 16; x++) {
62 if ((line + x) < (region + len)) {
63 c = *(uint8_t *)(line + x);
64 if ((c < ' ') || (c > '~')) /* !isprint(c) */
65 c = '.';
66 emit("%c", c);
67 } else {
68 emit(" ");
69 }
70 }
71 emit("|\n");
72 }
73 #ifdef HEXDUMP_PAGER
74 pager_close();
75 #endif
76 }
77