blob: 24a10d36d3b664a939f2febfed902c072310e497 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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, void *key)
13{
14 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, void *key1, void *key2)
27{
28 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