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/*
* Copyright (c) 1999 The University of Utah and the Flux Group.
* All rights reserved.
*
* Contributed by the Computer Security Research division,
* INFOSEC Research and Technology Office, NSA.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/* FLASK */
#include "avdeftab.h"
#define AVDEFTAB_HASH(key) (key % AVDEFTAB_SIZE)
#define AVDEFTAB_EQ(key1,key2) (key1 == key2)
int
avdeftab_insert(avdeftab_t * h, unsigned int key, avdef_datum_t * datum)
{
int hvalue;
avdef_ptr_t cur, newnode;
if (!h)
return -ENOMEM;
hvalue = AVDEFTAB_HASH(key);
cur = h->htable[hvalue];
while (cur != NULL && !AVDEFTAB_EQ(cur->key, key))
cur = cur->next;
if (cur != NULL)
return -EEXIST;
newnode = (avdef_ptr_t) malloc(sizeof(struct avdef_node_t));
if (newnode == NULL)
return -ENOMEM;
newnode->key = key;
newnode->datum = *datum;
newnode->next = h->htable[hvalue];
h->htable[hvalue] = newnode;
h->nel++;
return 0;
}
avdef_datum_t *
avdeftab_search(avdeftab_t * h, unsigned int key)
{
int hvalue;
avdef_ptr_t cur;
if (!h)
return NULL;
hvalue = AVDEFTAB_HASH(key);
cur = h->htable[hvalue];
while (cur != NULL && !AVDEFTAB_EQ(cur->key, key))
cur = cur->next;
if (cur == NULL)
return NULL;
return &cur->datum;
}
static int
perm_destroy(hashtab_key_t key, hashtab_datum_t datum, void *p)
{
FREE(key, strlen(key) + 1);
FREE(datum, sizeof(perm_datum_t));
return 0;
}
int
constraint_expr_destroy(constraint_expr_t * expr)
{
expr->count--;
if (expr->count == 0) {
ebitmap_destroy(&expr->bitmap);
if (expr->left)
constraint_expr_destroy(expr->left);
if (expr->right)
constraint_expr_destroy(expr->right);
free(expr);
}
return 0;
}
void
avdeftab_destroy(avdeftab_t * h)
{
int i;
avdef_ptr_t cur, temp;
constraint_node_t *constraint, *ctemp;
if (!h)
return;
for (i = 0; i < AVDEFTAB_SIZE; i++) {
cur = h->htable[i];
while (cur != NULL) {
hashtab_map(cur->datum.private.table, perm_destroy, 0);
hashtab_destroy(cur->datum.private.table);
constraint = cur->datum.constraints;
while (constraint) {
constraint_expr_destroy(constraint->expr);
ctemp = constraint;
constraint = constraint->next;
free(ctemp);
}
temp = cur;
cur = cur->next;
free(temp);
}
}
}
int
avdeftab_map(avdeftab_t * h,
int (*apply) (unsigned int key,
avdef_datum_t * d,
void *args),
void *args)
{
int i, ret;
avdef_ptr_t cur;
if (!h)
return 0;
for (i = 0; i < AVDEFTAB_SIZE; i++) {
cur = h->htable[i];
while (cur != NULL) {
ret = apply(cur->key, &cur->datum, args);
if (ret)
return ret;
cur = cur->next;
}
}
return 0;
}
int
avdeftab_init(avdeftab_t * h)
{
int i;
for (i = 0; i < AVDEFTAB_SIZE; i++)
h->htable[i] = (avdef_ptr_t) NULL;
h->nel = 0;
h->ncons = 0;
return 0;
}
/* FLASK */
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