/*
* hexdump implementation without depenecies to *printf()
* output is equal to 'hexdump -C'
* should be compatible to 64bit architectures
*
* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define hex_print(p) applog(LOG_DEBUG, "%s", p)
static char nibble[] = {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
#define BYTES_PER_LINE 0x10
static void hexdump(const uint8_t *p, unsigned int len)
{
unsigned int i, addr;
unsigned int wordlen = sizeof(unsigned int);
unsigned char v, line[BYTES_PER_LINE * 5];
for (addr = 0; addr < len; addr += BYTES_PER_LINE) {
/* clear line */
for (i = 0; i < sizeof(line); i++) {
if (i == wordlen * 2 + 52 ||
i == wordlen * 2 + 69) {
line[i] = '|';
continue;
}
if (i == wordlen * 2 + 70) {
line[i] = '\0';
continue;
}
line[i] = ' ';
}
/* print address */
for (i = 0; i < wordlen * 2; i++) {
v = addr >> ((wordlen * 2 - i - 1) * 4);
line[i] = nibble[v & 0xf];
}
/* dump content */
for (i = 0; i < BYTES_PER_LINE; i++) {
int pos = (wordlen * 2) + 3 + (i / 8);
if (addr + i >= len)
break;
v = p[addr + i];
line[pos + (i * 3) + 0] = nibble[v >> 4];
line[pos + (i * 3) + 1] = nibble[v & 0xf];
/* character printable? */
line[(wordlen * 2) + 53 + i] =
(v >= ' ' && v <= '~') ? v : '.';
}
hex_print(line);
}
}
