1/*- 2 * Copyright (c) 2017 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Christos Zoulas. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29#include <sys/cdefs.h> 30__KERNEL_RCSID(0, "$NetBSD: hexdump.c,v 1.4 2017/12/09 00:51:52 christos Exp $"); 31 32#ifdef DEBUG_HEXDUMP 33#include <stdio.h> 34#include <ctype.h> 35#include <string.h> 36#include <stdlib.h> 37#define RET int 38static const char hexdigits[] = "0123456789abcdef"; 39#else 40#define RET void 41#include <lib/libkern/libkern.h> 42#include <sys/systm.h> 43#endif 44 45#define MID (3 * 8) 46#define BAR ((3 * 16) + 1) 47#define ASC (BAR + 2) 48#define NL (BAR + 18) 49 50void 51hexdump(RET (*pr)(const char *, ...) __printflike(1, 2), const char *msg, 52 const void *ptr, size_t len) 53{ 54 size_t i, p, q; 55 const unsigned char *u = ptr; 56 char buf[NL + 2]; 57 58 if (msg) 59 (*pr)("%s: %zu bytes @ %p\n", msg, len, ptr); 60 61 buf[BAR] = '|'; 62 buf[BAR + 1] = ' '; 63 buf[NL] = '\n'; 64 buf[NL + 1] = '\0'; 65 for (q = p = i = 0; i < len; i++) { 66 unsigned char c = u[i]; 67 buf[p++] = hexdigits[(c >> 4) & 0xf]; 68 buf[p++] = hexdigits[(c >> 0) & 0xf]; 69 buf[p++] = ' '; 70 if (q == 7) 71 buf[p++] = ' '; 72 73 buf[ASC + q++] = isprint(c) ? c : '.'; 74 75 if (q == 16) { 76 q = p = 0; 77 (*pr)("%s", buf); 78 } 79 } 80 if (q) { 81 while (p < BAR) 82 buf[p++] = ' '; 83 buf[ASC + q++] = '\n'; 84 buf[ASC + q] = '\0'; 85 (*pr)("%s", buf); 86 } 87} 88 89#ifdef DEBUG_HEXDUMP 90int 91main(int argc, char *argv[]) 92{ 93 hexdump(printf, "foo", main, atoi(argv[1])); 94 return 0; 95} 96#endif 97