1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1986, 1988, 1991, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#include <sys/types.h>
38#include <libutil.h>
39#include <stdio.h>
40
41void
42hexdump(const void *ptr, int length, const char *hdr, int flags)
43{
44	int i, j, k;
45	int cols;
46	const unsigned char *cp;
47	char delim;
48
49	if ((flags & HD_DELIM_MASK) != 0)
50		delim = (flags & HD_DELIM_MASK) >> 8;
51	else
52		delim = ' ';
53
54	if ((flags & HD_COLUMN_MASK) != 0)
55		cols = flags & HD_COLUMN_MASK;
56	else
57		cols = 16;
58
59	cp = ptr;
60	for (i = 0; i < length; i+= cols) {
61		if (hdr != NULL)
62			printf("%s", hdr);
63
64		if ((flags & HD_OMIT_COUNT) == 0)
65			printf("%04x  ", i);
66
67		if ((flags & HD_OMIT_HEX) == 0) {
68			for (j = 0; j < cols; j++) {
69				k = i + j;
70				if (k < length)
71					printf("%c%02x", delim, cp[k]);
72				else
73					printf("   ");
74			}
75		}
76
77		if ((flags & HD_OMIT_CHARS) == 0) {
78			printf("  |");
79			for (j = 0; j < cols; j++) {
80				k = i + j;
81				if (k >= length)
82					printf(" ");
83				else if (cp[k] >= ' ' && cp[k] <= '~')
84					printf("%c", cp[k]);
85				else
86					printf(".");
87			}
88			printf("|");
89		}
90		printf("\n");
91	}
92}
93
94