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/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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/cdefs.h>
__FBSDID("$FreeBSD$");
#include <string.h>
#include <stand.h>
/*
* Display a region in traditional hexdump format.
*/
void
hexdump(caddr_t region, size_t len)
{
caddr_t line;
int x, c;
#ifdef HEXDUMP_PAGER
/* pager causes linking issues for some apps */
#define emit(fmt, args...) {sprintf(lbuf, fmt , ## args); pager_output(lbuf);}
char lbuf[80];
pager_open();
#else
#define emit(fmt, args...) printf(fmt, ## args)
#endif
for (line = region; line < (region + len); line += 16) {
emit("%08lx ", (long) line);
for (x = 0; x < 16; x++) {
if ((line + x) < (region + len)) {
emit("%02x ", *(uint8_t *)(line + x));
} else {
emit("-- ");
}
if (x == 7)
emit(" ");
}
emit(" |");
for (x = 0; x < 16; x++) {
if ((line + x) < (region + len)) {
c = *(uint8_t *)(line + x);
if ((c < ' ') || (c > '~')) /* !isprint(c) */
c = '.';
emit("%c", c);
} else {
emit(" ");
}
}
emit("|\n");
}
#ifdef HEXDUMP_PAGER
pager_close();
#endif
}