1 /*-
2 * Copyright (c) 2012 Alistair Crooks <agc@NetBSD.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 ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25 #include <inttypes.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <unistd.h>
30
31 #ifndef isprint
32 #define isprint(x) ((x) >= ' ' && (x) <= '~')
33 #endif
34
35 #define HEXDUMP_LINELEN 16
36
37 #ifndef PRIsize
38 #define PRIsize "z"
39 #endif
40
41 /* show hexadecimal/ascii dump */
42 static ssize_t
hexdump(const char * in,const size_t len,void * outvp,size_t size)43 hexdump(const char *in, const size_t len, void *outvp, size_t size)
44 {
45 size_t i;
46 char line[HEXDUMP_LINELEN + 1];
47 char *out = (char *)outvp;
48 int o;
49
50 for (i = 0, o = 0 ; i < len ; i++) {
51 if (i % HEXDUMP_LINELEN == 0) {
52 o += snprintf(&out[o], size - o,
53 "%.5" PRIsize "u | ", i);
54 }
55 o += snprintf(&out[o], size - o, "%.02x ", (uint8_t)in[i]);
56 line[i % HEXDUMP_LINELEN] =
57 (isprint((uint8_t)in[i])) ? in[i] : '.';
58 if (i % HEXDUMP_LINELEN == HEXDUMP_LINELEN - 1) {
59 line[HEXDUMP_LINELEN] = 0x0;
60 o += snprintf(&out[o], size - o, " | %s\n", line);
61 }
62 }
63 if (i % HEXDUMP_LINELEN != 0) {
64 for ( ; i % HEXDUMP_LINELEN != 0 ; i++) {
65 o += snprintf(&out[o], size - o, " ");
66 line[i % HEXDUMP_LINELEN] = ' ';
67 }
68 line[HEXDUMP_LINELEN] = 0x0;
69 o += snprintf(&out[o], size - o, " | %s\n", line);
70 }
71 return (ssize_t)o;
72 }
73
74 void dumpmem(void */*p*/, size_t /*size*/);
75
76 /* just dump an area of memory to stdout */
77 void
dumpmem(void * vp,size_t size)78 dumpmem(void *vp, size_t size)
79 {
80 ssize_t cc;
81 uint8_t *p = (uint8_t *)vp;
82 char *buf;
83
84 buf = calloc(1, size * 5);
85 cc = hexdump((const char *)p, size, buf, size * 5);
86 fprintf(stdout, "%.*s\n", (int)cc, buf);
87 free(buf);
88 }
89