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/cdefs.h> 38 #include <sys/types.h> 39 #include <libutil.h> 40 #include <stdio.h> 41 42 void 43 hexdump(const void *ptr, int length, const char *hdr, int flags) 44 { 45 int i, j, k; 46 int cols; 47 const unsigned char *cp; 48 char delim; 49 50 if ((flags & HD_DELIM_MASK) != 0) 51 delim = (flags & HD_DELIM_MASK) >> 8; 52 else 53 delim = ' '; 54 55 if ((flags & HD_COLUMN_MASK) != 0) 56 cols = flags & HD_COLUMN_MASK; 57 else 58 cols = 16; 59 60 cp = ptr; 61 for (i = 0; i < length; i+= cols) { 62 if (hdr != NULL) 63 printf("%s", hdr); 64 65 if ((flags & HD_OMIT_COUNT) == 0) 66 printf("%04x ", i); 67 68 if ((flags & HD_OMIT_HEX) == 0) { 69 for (j = 0; j < cols; j++) { 70 k = i + j; 71 if (k < length) 72 printf("%c%02x", delim, cp[k]); 73 else 74 printf(" "); 75 } 76 } 77 78 if ((flags & HD_OMIT_CHARS) == 0) { 79 printf(" |"); 80 for (j = 0; j < cols; j++) { 81 k = i + j; 82 if (k >= length) 83 printf(" "); 84 else if (cp[k] >= ' ' && cp[k] <= '~') 85 printf("%c", cp[k]); 86 else 87 printf("."); 88 } 89 printf("|"); 90 } 91 printf("\n"); 92 } 93 } 94 95