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
41 void
hexdump(const void * ptr,int length,const char * hdr,int flags)42 hexdump(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