1 /* vim: set expandtab ts=4 sw=4: */
2 /*
3 * You may redistribute this program and/or modify it under the terms of
4 * the GNU General Public License as published by the Free Software Foundation,
5 * either version 3 of the License, or (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program. If not, see <https://www.gnu.org/licenses/>.
14 */
15 #ifndef Hash_H
16 #define Hash_H
17
18 #include <stdint.h>
19
20 /** The DJB2a hash (equivilant to DJB2 but using XOR instead of +) */
Hash_compute(uint8_t * str,int length)21 static uint32_t Hash_compute(uint8_t* str, int length)
22 {
23 uint32_t hash = 5381;
24 for (int i = 0; i < length; i++) {
25 hash = ((hash << 5) + hash) ^ str[i];
26 }
27 return hash;
28 }
29
30 #endif
31