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 /*
23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <string.h>
28 #include <sys/types.h>
29
30 #include <inj.h>
31 #include <inj_err.h>
32
33 #define INJ_HASHSZ 211
34
35 struct inj_var {
36 struct inj_var *v_next;
37 uintmax_t v_uvalue;
38 void *v_key;
39 };
40
41 void
inj_hash_create(inj_hash_t * h,ulong_t (* hfn)(void *),int (* cfn)(void *,void *))42 inj_hash_create(inj_hash_t *h, ulong_t (*hfn)(void *),
43 int (*cfn)(void *, void *))
44 {
45 h->h_hash = inj_zalloc(sizeof (inj_var_t *) * INJ_HASHSZ);
46 h->h_hashsz = INJ_HASHSZ;
47 h->h_nelems = 0;
48
49 h->h_hashfn = hfn;
50 h->h_cmpfn = cfn;
51 }
52
53 static inj_var_t *
inj_var_alloc(void * key,uintmax_t value,inj_var_t * next)54 inj_var_alloc(void *key, uintmax_t value, inj_var_t *next)
55 {
56 inj_var_t *v = inj_alloc(sizeof (inj_var_t));
57
58 v->v_next = next;
59 v->v_key = key;
60 v->v_uvalue = value;
61
62 return (v);
63 }
64
65 static void
inj_var_free(inj_var_t * v,void (* freefn)(inj_var_t *,void *),void * arg)66 inj_var_free(inj_var_t *v, void (*freefn)(inj_var_t *, void *), void *arg)
67 {
68 if (freefn != NULL)
69 freefn(v, arg);
70
71 inj_free(v, sizeof (inj_var_t));
72 }
73
74 void
inj_hash_destroy(inj_hash_t * h,void (* freefn)(inj_var_t *,void *),void * arg)75 inj_hash_destroy(inj_hash_t *h, void (*freefn)(inj_var_t *, void *), void *arg)
76 {
77 inj_var_t *v, *w;
78 size_t i;
79
80 for (i = 0; i < h->h_hashsz; i++) {
81 for (v = h->h_hash[i]; v != NULL; v = w) {
82 w = v->v_next;
83 inj_var_free(v, freefn, arg);
84 }
85 }
86
87 inj_free(h->h_hash, sizeof (inj_var_t *) * INJ_HASHSZ);
88 }
89
90 int
inj_hash_insert(inj_hash_t * h,void * key,uintmax_t value)91 inj_hash_insert(inj_hash_t *h, void *key, uintmax_t value)
92 {
93 size_t i = h->h_hashfn(key) % h->h_hashsz;
94 inj_var_t *v;
95
96 for (v = h->h_hash[i]; v != NULL; v = v->v_next) {
97 if (h->h_cmpfn(v->v_key, key) == 0)
98 return (-1);
99 }
100
101 /* not found - make a new one */
102 v = inj_var_alloc(key, value, h->h_hash[i]);
103 h->h_hash[i] = v;
104 h->h_nelems++;
105
106 return (0);
107 }
108
109 inj_var_t *
inj_hash_lookup(inj_hash_t * h,void * key)110 inj_hash_lookup(inj_hash_t *h, void *key)
111 {
112 size_t i = h->h_hashfn(key) % h->h_hashsz;
113 inj_var_t *v;
114
115 for (v = h->h_hash[i]; v != NULL; v = v->v_next) {
116 if (h->h_cmpfn(v->v_key, key) == 0)
117 return (v);
118 }
119
120 return (NULL);
121 }
122
123 void *
inj_hash_get_key(inj_var_t * v)124 inj_hash_get_key(inj_var_t *v)
125 {
126 return (v->v_key);
127 }
128
129 uintmax_t
inj_hash_get_value(inj_var_t * v)130 inj_hash_get_value(inj_var_t *v)
131 {
132 return (v->v_uvalue);
133 }
134
135 void *
inj_hash_get_cookie(inj_var_t * v)136 inj_hash_get_cookie(inj_var_t *v)
137 {
138 return ((void *)(uintptr_t)v->v_uvalue);
139 }
140