1 /*-
2 * Copyright (c) 2005 Michael Bushkov <bushman@rsu.ru>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <assert.h>
32 #include <stdlib.h>
33 #include <string.h>
34
35 #include "agent.h"
36 #include "debug.h"
37
38 static int
agent_cmp_func(const void * a1,const void * a2)39 agent_cmp_func(const void *a1, const void *a2)
40 {
41 struct agent const *ap1 = *((struct agent const **)a1);
42 struct agent const *ap2 = *((struct agent const **)a2);
43 int res;
44
45 res = strcmp(ap1->name, ap2->name);
46 if (res == 0) {
47 if (ap1->type == ap2->type)
48 res = 0;
49 else if (ap1->type < ap2->type)
50 res = -1;
51 else
52 res = 1;
53 }
54
55 return (res);
56 }
57
58 struct agent_table *
init_agent_table(void)59 init_agent_table(void)
60 {
61 struct agent_table *retval;
62
63 TRACE_IN(init_agent_table);
64 retval = calloc(1, sizeof(*retval));
65 assert(retval != NULL);
66
67 TRACE_OUT(init_agent_table);
68 return (retval);
69 }
70
71 void
register_agent(struct agent_table * at,struct agent * a)72 register_agent(struct agent_table *at, struct agent *a)
73 {
74 struct agent **new_agents;
75 size_t new_agents_num;
76
77 TRACE_IN(register_agent);
78 assert(at != NULL);
79 assert(a != NULL);
80 new_agents_num = at->agents_num + 1;
81 new_agents = malloc(sizeof(*new_agents) *
82 new_agents_num);
83 assert(new_agents != NULL);
84 memcpy(new_agents, at->agents, at->agents_num * sizeof(struct agent *));
85 new_agents[new_agents_num - 1] = a;
86 qsort(new_agents, new_agents_num, sizeof(struct agent *),
87 agent_cmp_func);
88
89 free(at->agents);
90 at->agents = new_agents;
91 at->agents_num = new_agents_num;
92 TRACE_OUT(register_agent);
93 }
94
95 struct agent *
find_agent(struct agent_table * at,const char * name,enum agent_type type)96 find_agent(struct agent_table *at, const char *name, enum agent_type type)
97 {
98 struct agent **res;
99 struct agent model, *model_p;
100
101 TRACE_IN(find_agent);
102 model.name = (char *)name;
103 model.type = type;
104 model_p = &model;
105 res = bsearch(&model_p, at->agents, at->agents_num,
106 sizeof(struct agent *), agent_cmp_func);
107
108 TRACE_OUT(find_agent);
109 return ( res == NULL ? NULL : *res);
110 }
111
112 void
destroy_agent_table(struct agent_table * at)113 destroy_agent_table(struct agent_table *at)
114 {
115 size_t i;
116
117 TRACE_IN(destroy_agent_table);
118 assert(at != NULL);
119 for (i = 0; i < at->agents_num; ++i) {
120 free(at->agents[i]->name);
121 free(at->agents[i]);
122 }
123
124 free(at->agents);
125 free(at);
126 TRACE_OUT(destroy_agent_table);
127 }
128