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 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <string.h>
30 #include <sys/types.h>
31
32 #include <inj.h>
33 #include <inj_err.h>
34
35 #define INJ_HASHSZ 211
36
37 struct inj_var {
38 struct inj_var *v_next;
39 uintmax_t v_uvalue;
40 void *v_key;
41 };
42
43 void
inj_hash_create(inj_hash_t * h,ulong_t (* hfn)(void *),int (* cfn)(void *,void *))44 inj_hash_create(inj_hash_t *h, ulong_t (*hfn)(void *),
45 int (*cfn)(void *, void *))
46 {
47 h->h_hash = inj_zalloc(sizeof (inj_var_t *) * INJ_HASHSZ);
48 h->h_hashsz = INJ_HASHSZ;
49 h->h_nelems = 0;
50
51 h->h_hashfn = hfn;
52 h->h_cmpfn = cfn;
53 }
54
55 static inj_var_t *
inj_var_alloc(void * key,uintmax_t value,inj_var_t * next)56 inj_var_alloc(void *key, uintmax_t value, inj_var_t *next)
57 {
58 inj_var_t *v = inj_alloc(sizeof (inj_var_t));
59
60 v->v_next = next;
61 v->v_key = key;
62 v->v_uvalue = value;
63
64 return (v);
65 }
66
67 static void
inj_var_free(inj_var_t * v,void (* freefn)(inj_var_t *,void *),void * arg)68 inj_var_free(inj_var_t *v, void (*freefn)(inj_var_t *, void *), void *arg)
69 {
70 if (freefn != NULL)
71 freefn(v, arg);
72
73 inj_free(v, sizeof (inj_var_t));
74 }
75
76 void
inj_hash_destroy(inj_hash_t * h,void (* freefn)(inj_var_t *,void *),void * arg)77 inj_hash_destroy(inj_hash_t *h, void (*freefn)(inj_var_t *, void *), void *arg)
78 {
79 inj_var_t *v, *w;
80 size_t i;
81
82 for (i = 0; i < h->h_hashsz; i++) {
83 for (v = h->h_hash[i]; v != NULL; v = w) {
84 w = v->v_next;
85 inj_var_free(v, freefn, arg);
86 }
87 }
88
89 inj_free(h->h_hash, sizeof (inj_var_t *) * INJ_HASHSZ);
90 }
91
92 int
inj_hash_insert(inj_hash_t * h,void * key,uintmax_t value)93 inj_hash_insert(inj_hash_t *h, void *key, uintmax_t value)
94 {
95 size_t i = h->h_hashfn(key) % h->h_hashsz;
96 inj_var_t *v;
97
98 for (v = h->h_hash[i]; v != NULL; v = v->v_next) {
99 if (h->h_cmpfn(v->v_key, key) == 0)
100 return (-1);
101 }
102
103 /* not found - make a new one */
104 v = inj_var_alloc(key, value, h->h_hash[i]);
105 h->h_hash[i] = v;
106 h->h_nelems++;
107
108 return (0);
109 }
110
111 inj_var_t *
inj_hash_lookup(inj_hash_t * h,void * key)112 inj_hash_lookup(inj_hash_t *h, void *key)
113 {
114 size_t i = h->h_hashfn(key) % h->h_hashsz;
115 inj_var_t *v;
116
117 for (v = h->h_hash[i]; v != NULL; v = v->v_next) {
118 if (h->h_cmpfn(v->v_key, key) == 0)
119 return (v);
120 }
121
122 return (NULL);
123 }
124
125 void *
inj_hash_get_key(inj_var_t * v)126 inj_hash_get_key(inj_var_t *v)
127 {
128 return (v->v_key);
129 }
130
131 uintmax_t
inj_hash_get_value(inj_var_t * v)132 inj_hash_get_value(inj_var_t *v)
133 {
134 return (v->v_uvalue);
135 }
136
137 void *
inj_hash_get_cookie(inj_var_t * v)138 inj_hash_get_cookie(inj_var_t *v)
139 {
140 return ((void *)(uintptr_t)v->v_uvalue);
141 }
142