237389e301
This encapsulates symtab a little better and will help with further refactoring later. Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Acked-by: Stephen Smalley <stephen.smalley.work@gmail.com> Signed-off-by: Paul Moore <paul@paul-moore.com>
51 lines
1.0 KiB
C
51 lines
1.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Implementation of the symbol table type.
|
|
*
|
|
* Author : Stephen Smalley, <sds@tycho.nsa.gov>
|
|
*/
|
|
#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->nprim = 0;
|
|
return hashtab_init(&s->table, symhash, symcmp, size);
|
|
}
|
|
|
|
int symtab_insert(struct symtab *s, char *name, void *datum)
|
|
{
|
|
return hashtab_insert(&s->table, name, datum);
|
|
}
|
|
|
|
void *symtab_search(struct symtab *s, const char *name)
|
|
{
|
|
return hashtab_search(&s->table, name);
|
|
}
|