1 /* $OpenBSD: hexdump.c,v 1.1 2019/11/28 00:17:13 bluhm Exp $ */
2 /*
3 * Copyright (c) 2019 Alexander Bluhm <bluhm@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <sys/types.h>
19
20 #include "stand.h"
21
22 void
hexdump(const void * addr,size_t size)23 hexdump(const void *addr, size_t size)
24 {
25 const unsigned char *line, *end;
26 int byte;
27
28 end = (const char *)addr + size;
29 for (line = addr; line < end; line += 16) {
30 printf("%08lx ", line);
31 for (byte = 0; byte < 16; byte++) {
32 if (&line[byte] < end)
33 printf("%02x ", line[byte]);
34 else
35 printf(" ");
36 if (byte == 7)
37 printf(" ");
38 }
39 printf(" |");
40 for (byte = 0; byte < 16; byte++) {
41 if (&line[byte] < end) {
42 if (line[byte] >= ' ' && line[byte] <= '~')
43 printf("%c", line[byte]);
44 else
45 printf(".");
46 } else
47 break;
48 }
49 printf("|\n");
50 }
51 printf("%08lx\n", end);
52 }
53