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/* zd_util.c
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Utility program
*/
#include "zd_def.h"
#include "zd_util.h"
#ifdef DEBUG
static char hex(u8 v)
{
v &= 0xf;
return (v < 10 ? '0' : 'a' - 10) + v;
}
static char hex_print(u8 c)
{
return (0x20 <= c && c < 0x7f) ? c : '.';
}
static void dump_line(const u8 *bytes, size_t size)
{
char c;
size_t i;
size = size <= 8 ? size : 8;
printk(KERN_DEBUG "zd1211 %p ", bytes);
for (i = 0; i < 8; i++) {
switch (i) {
case 1:
case 5:
c = '.';
break;
case 3:
c = ':';
break;
default:
c = ' ';
}
if (i < size) {
printk("%c%c%c", hex(bytes[i] >> 4), hex(bytes[i]), c);
} else {
printk(" %c", c);
}
}
for (i = 0; i < size; i++)
printk("%c", hex_print(bytes[i]));
printk("\n");
}
void zd_hexdump(const void *bytes, size_t size)
{
size_t i = 0;
do {
dump_line((u8 *)bytes + i, size-i);
i += 8;
} while (i < size);
}
#endif /* DEBUG */
void *zd_tail(const void *buffer, size_t buffer_size, size_t tail_size)
{
if (buffer_size < tail_size)
return NULL;
return (u8 *)buffer + (buffer_size - tail_size);
}
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