1
2 /* Author : Stephen Smalley, <sds@epoch.ncsc.mil> */
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
symhash(hashtab_t h,hashtab_key_t key)14 static unsigned int symhash(hashtab_t h, hashtab_key_t key)
15 {
16 char *p, *keyp;
17 size_t size;
18 unsigned int val;
19
20 val = 0;
21 keyp = (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
symcmp(hashtab_t h,hashtab_key_t key1,hashtab_key_t key2)29 static int symcmp(hashtab_t h
30 __attribute__ ((unused)), hashtab_key_t key1,
31 hashtab_key_t key2)
32 {
33 char *keyp1, *keyp2;
34
35 keyp1 = (char *)key1;
36 keyp2 = (char *)key2;
37 return strcmp(keyp1, keyp2);
38 }
39
symtab_init(symtab_t * s,unsigned int size)40 int symtab_init(symtab_t * s, unsigned int size)
41 {
42 s->table = hashtab_create(symhash, symcmp, size);
43 if (!s->table)
44 return -1;
45 s->nprim = 0;
46 return 0;
47 }
48
symtab_destroy(symtab_t * s)49 void symtab_destroy(symtab_t * s)
50 {
51 if (!s)
52 return;
53 if (s->table)
54 hashtab_destroy(s->table);
55 return;
56 }
57 /* FLASK */
58