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