1/*
2 * Implementation of the symbol table type.
3 *
4 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
5 */
6#include <linux/kernel.h>
7#include <linux/string.h>
8#include <linux/errno.h>
9#include "symtab.h"
10
11static unsigned int symhash(struct hashtab *h, const void *key)
12{
13	const char *p, *keyp;
14	unsigned int size;
15	unsigned int val;
16
17	val = 0;
18	keyp = key;
19	size = strlen(keyp);
20	for (p = keyp; (p - keyp) < size; p++)
21		val = (val << 4 | (val >> (8*sizeof(unsigned int)-4))) ^ (*p);
22	return val & (h->size - 1);
23}
24
25static int symcmp(struct hashtab *h, const void *key1, const void *key2)
26{
27	const char *keyp1, *keyp2;
28
29	keyp1 = key1;
30	keyp2 = key2;
31	return strcmp(keyp1, keyp2);
32}
33
34
35int symtab_init(struct symtab *s, unsigned int size)
36{
37	s->table = hashtab_create(symhash, symcmp, size);
38	if (!s->table)
39		return -ENOMEM;
40	s->nprim = 0;
41	return 0;
42}
43
44