1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #include <stdio.h>
27 #include <string.h>
28 #include <stdlib.h>
29
30 #include "cache.h"
31
32 nsc_keephot_t *
maken(int n)33 maken(int n)
34 {
35 nsc_keephot_t *ret;
36
37 ++n;
38 ret = (nsc_keephot_t *)calloc(n, sizeof (nsc_keephot_t));
39 if (ret == NULL)
40 return (NULL);
41 ret[0].num = n - 1;
42 return (ret);
43 }
44
45 void *
insertn(nsc_keephot_t * table,uint_t n,void * data)46 insertn(nsc_keephot_t *table, uint_t n, void *data)
47 {
48 void *olddata;
49 int size, guess, base, last;
50
51 if (n < 1 || table[1].num > n) {
52 return (data);
53 }
54
55 size = table[0].num;
56 if (table[size].num < n) /* biggest so far */
57 guess = size;
58 else {
59 base = 1;
60 last = size;
61 while (last >= base) {
62 guess = (last+base)/2;
63 if (table[guess].num == n)
64 goto doit;
65 if (table[guess].num > n)
66 last = guess - 1;
67 else
68 base = guess + 1;
69 }
70 guess = last;
71 }
72
73 doit:
74 olddata = table[1].ptr;
75 (void) memmove(table + 1, table + 2,
76 sizeof (nsc_keephot_t) * (guess-1));
77 table[guess].ptr = data;
78 table[guess].num = n;
79 return (olddata);
80 }
81