/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1986, 1988, 1991, 1993
 *      The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/types.h>
#include <libutil.h>
#include <stdio.h>

void
hexdump(const void *ptr, int length, const char *hdr, int flags)
{
        int i, j, k;
        int cols;
        const unsigned char *cp;
        char delim;

        if ((flags & HD_DELIM_MASK) != 0)
                delim = (flags & HD_DELIM_MASK) >> 8;
        else
                delim = ' ';

        if ((flags & HD_COLUMN_MASK) != 0)
                cols = flags & HD_COLUMN_MASK;
        else
                cols = 16;

        cp = ptr;
        for (i = 0; i < length; i+= cols) {
                if (hdr != NULL)
                        printf("%s", hdr);

                if ((flags & HD_OMIT_COUNT) == 0)
                        printf("%04x  ", i);

                if ((flags & HD_OMIT_HEX) == 0) {
                        for (j = 0; j < cols; j++) {
                                k = i + j;
                                if (k < length)
                                        printf("%c%02x", delim, cp[k]);
                                else
                                        printf("   ");
                        }
                }

                if ((flags & HD_OMIT_CHARS) == 0) {
                        printf("  |");
                        for (j = 0; j < cols; j++) {
                                k = i + j;
                                if (k >= length)
                                        printf(" ");
                                else if (cp[k] >= ' ' && cp[k] <= '~')
                                        printf("%c", cp[k]);
                                else
                                        printf(".");
                        }
                        printf("|");
                }
                printf("\n");
        }
}