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