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
symhash(struct hashtab * h,const void * key)11 static 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
symcmp(struct hashtab * h,const void * key1,const void * key2)25 static 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
symtab_init(struct symtab * s,unsigned int size)35 int 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