83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
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/* zd_util.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Utility program
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*/
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#include "zd_def.h"
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#include "zd_util.h"
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#ifdef DEBUG
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static char hex(u8 v)
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{
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v &= 0xf;
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return (v < 10 ? '0' : 'a' - 10) + v;
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}
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static char hex_print(u8 c)
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{
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return (0x20 <= c && c < 0x7f) ? c : '.';
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}
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static void dump_line(const u8 *bytes, size_t size)
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{
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char c;
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size_t i;
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size = size <= 8 ? size : 8;
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printk(KERN_DEBUG "zd1211 %p ", bytes);
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for (i = 0; i < 8; i++) {
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switch (i) {
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case 1:
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case 5:
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c = '.';
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break;
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case 3:
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c = ':';
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break;
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default:
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c = ' ';
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}
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if (i < size) {
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printk("%c%c%c", hex(bytes[i] >> 4), hex(bytes[i]), c);
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} else {
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printk(" %c", c);
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}
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}
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for (i = 0; i < size; i++)
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printk("%c", hex_print(bytes[i]));
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printk("\n");
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}
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void zd_hexdump(const void *bytes, size_t size)
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{
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size_t i = 0;
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do {
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dump_line((u8 *)bytes + i, size-i);
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i += 8;
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} while (i < size);
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}
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#endif /* DEBUG */
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void *zd_tail(const void *buffer, size_t buffer_size, size_t tail_size)
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{
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if (buffer_size < tail_size)
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return NULL;
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return (u8 *)buffer + (buffer_size - tail_size);
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}
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