1
2/* Author : Stephen Smalley, <sds@tycho.nsa.gov> */
3
4/* FLASK */
5
6/*
7 * Implementation of the symbol table type.
8 */
9
10#include <string.h>
11#include <sepol/policydb/hashtab.h>
12#include <sepol/policydb/symtab.h>
13
14static unsigned int symhash(hashtab_t h, const_hashtab_key_t key)
15{
16	const char *p, *keyp;
17	size_t size;
18	unsigned int val;
19
20	val = 0;
21	keyp = (const char *)key;
22	size = strlen(keyp);
23	for (p = keyp; ((size_t) (p - keyp)) < size; p++)
24		val =
25		    (val << 4 | (val >> (8 * sizeof(unsigned int) - 4))) ^ (*p);
26	return val & (h->size - 1);
27}
28
29static int symcmp(hashtab_t h
30		  __attribute__ ((unused)), const_hashtab_key_t key1,
31		  const_hashtab_key_t key2)
32{
33	return strcmp(key1, key2);
34}
35
36int symtab_init(symtab_t * 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
45void symtab_destroy(symtab_t * s)
46{
47	if (!s)
48		return;
49	if (s->table)
50		hashtab_destroy(s->table);
51	return;
52}
53/* FLASK */
54