9a7982793c
hashtab_create() only returns NULL on allocation failures to -ENOMEM is appropriate here. Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: Eric Paris <eparis@redhat.com> Acked-by: Stephen D. Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
44 lines
850 B
C
44 lines
850 B
C
/*
|
|
* 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;
|
|
}
|
|
|