80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
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/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <string.h>
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#include <stand.h>
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/*
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* Display a region in traditional hexdump format.
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*/
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void
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hexdump(caddr_t region, size_t len)
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{
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caddr_t line;
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int x, c;
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#ifdef HEXDUMP_PAGER
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/* pager causes linking issues for some apps */
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#define emit(fmt, args...) {sprintf(lbuf, fmt , ## args); pager_output(lbuf);}
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char lbuf[80];
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pager_open();
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#else
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#define emit(fmt, args...) printf(fmt, ## args)
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#endif
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for (line = region; line < (region + len); line += 16) {
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emit("%08lx ", (long) line);
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for (x = 0; x < 16; x++) {
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if ((line + x) < (region + len)) {
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emit("%02x ", *(uint8_t *)(line + x));
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} else {
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emit("-- ");
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}
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if (x == 7)
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emit(" ");
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}
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emit(" |");
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for (x = 0; x < 16; x++) {
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if ((line + x) < (region + len)) {
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c = *(uint8_t *)(line + x);
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if ((c < ' ') || (c > '~')) /* !isprint(c) */
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c = '.';
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emit("%c", c);
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} else {
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emit(" ");
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}
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}
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emit("|\n");
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}
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#ifdef HEXDUMP_PAGER
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pager_close();
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#endif
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}
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