usr/src/cmd/bhyve/hexdump.c

   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  *      @(#)subr_prf.c  8.3 (Berkeley) 1/21/94
  37  */
  38
  39 #include <sys/cdefs.h>
  40 __FBSDID("$FreeBSD$");
  41
  42 #include <sys/types.h>
  43 #include <stdio.h>
  44 #include "hexdump.h"
  45
  46 void
  47 hexdump(const void *ptr, int length, const char *hdr, int flags)
  48 {
  49         int i, j, k;
  50         int cols;
  51         const unsigned char *cp;
  52         char delim;
  53
  54         if ((flags & HD_DELIM_MASK) != 0)
  55                 delim = (flags & HD_DELIM_MASK) >> 8;
  56         else
  57                 delim = ' ';
  58
  59         if ((flags & HD_COLUMN_MASK) != 0)
  60                 cols = flags & HD_COLUMN_MASK;
  61         else
  62                 cols = 16;
  63
  64         cp = ptr;
  65         for (i = 0; i < length; i += cols) {
  66                 if (hdr != NULL)
  67                         printf("%s", hdr);
  68
  69                 if ((flags & HD_OMIT_COUNT) == 0)
  70                         printf("%04x  ", i);
  71
  72                 if ((flags & HD_OMIT_HEX) == 0) {
  73                         for (j = 0; j < cols; j++) {
  74                                 k = i + j;
  75                                 if (k < length)
  76                                         printf("%c%02x", delim, cp[k]);
  77                                 else
  78                                         printf("   ");
  79                         }
  80                 }
  81
  82                 if ((flags & HD_OMIT_CHARS) == 0) {
  83                         printf("  |");
  84                         for (j = 0; j < cols; j++) {
  85                                 k = i + j;
  86                                 if (k >= length)
  87                                         printf(" ");
  88                                 else if (cp[k] >= ' ' && cp[k] <= '~')
  89                                         printf("%c", cp[k]);
  90                                 else
  91                                         printf(".");
  92                         }
  93                         printf("|");
  94                 }
  95                 printf("\n");
  96         }
  97 }