diff options
Diffstat (limited to 'security/selinux/ss/symtab.c')
-rw-r--r-- | security/selinux/ss/symtab.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/security/selinux/ss/symtab.c b/security/selinux/ss/symtab.c new file mode 100644 index 00000000..160326ee --- /dev/null +++ b/security/selinux/ss/symtab.c @@ -0,0 +1,43 @@ +/* + * Implementation of the symbol table type. + * + * Author : Stephen Smalley, <sds@epoch.ncsc.mil> + */ +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/errno.h> +#include "symtab.h" + +static unsigned int symhash(struct hashtab *h, const void *key) +{ + const char *p, *keyp; + unsigned int size; + unsigned int val; + + val = 0; + keyp = key; + size = strlen(keyp); + for (p = keyp; (p - keyp) < size; p++) + val = (val << 4 | (val >> (8*sizeof(unsigned int)-4))) ^ (*p); + return val & (h->size - 1); +} + +static int symcmp(struct hashtab *h, const void *key1, const void *key2) +{ + const char *keyp1, *keyp2; + + keyp1 = key1; + keyp2 = key2; + return strcmp(keyp1, keyp2); +} + + +int symtab_init(struct symtab *s, unsigned int size) +{ + s->table = hashtab_create(symhash, symcmp, size); + if (!s->table) + return -ENOMEM; + s->nprim = 0; + return 0; +} + |