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, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <libintl.h>
28 #include <string.h>
29 #include <stdlib.h>
30 #include <libuutil.h>
31
32 #include "idtab.h"
33
34 #define IDTAB_GROW 2 /* Table size multiplier on grow */
35 #define IDTAB_DEFSIZE 16 /* Starting table size */
36
37 void
idtab_create(idtab_t * idt)38 idtab_create(idtab_t *idt)
39 {
40 (void) memset(idt, 0, sizeof (idtab_t));
41 }
42
43 void
idtab_destroy(idtab_t * idt)44 idtab_destroy(idtab_t *idt)
45 {
46 if (idt->id_data) {
47 free(idt->id_data);
48 idt->id_data = NULL;
49 idt->id_nelems = idt->id_size = 0;
50 }
51 }
52
53 void
idtab_append(idtab_t * idt,idkey_t id)54 idtab_append(idtab_t *idt, idkey_t id)
55 {
56 size_t size;
57 void *data;
58
59 if (idt->id_nelems >= idt->id_size) {
60 size = idt->id_size ? idt->id_size * IDTAB_GROW : IDTAB_DEFSIZE;
61
62 if (data = realloc(idt->id_data, sizeof (idkey_t) * size)) {
63 idt->id_data = data;
64 idt->id_size = size;
65 } else {
66 uu_die(gettext("Failed to grow table"));
67 }
68 }
69
70 idt->id_data[idt->id_nelems++] = id;
71 }
72
73 static int
idtab_compare(const void * lhsp,const void * rhsp)74 idtab_compare(const void *lhsp, const void *rhsp)
75 {
76 idkey_t lhs = *((idkey_t *)lhsp);
77 idkey_t rhs = *((idkey_t *)rhsp);
78
79 if (lhs == rhs)
80 return (0);
81
82 return (lhs > rhs ? 1 : -1);
83 }
84
85 void
idtab_sort(idtab_t * idt)86 idtab_sort(idtab_t *idt)
87 {
88 if (idt->id_data) {
89 qsort(idt->id_data, idt->id_nelems,
90 sizeof (idkey_t), idtab_compare);
91 }
92 }
93
94 int
idtab_search(idtab_t * idt,idkey_t id)95 idtab_search(idtab_t *idt, idkey_t id)
96 {
97 return (bsearch(&id, idt->id_data, idt->id_nelems,
98 sizeof (idkey_t), idtab_compare) != NULL);
99 }
100