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,const_hashtab_key_t key)14 static 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
symcmp(hashtab_t h,const_hashtab_key_t key1,const_hashtab_key_t key2)29 static 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
symtab_init(symtab_t * s,unsigned int size)36 int 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
symtab_destroy(symtab_t * s)45 void 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