Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 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 | |
| 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 | |
| 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 | |
| 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 | |
| 49 | /* FLASK */ |