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 #include <assert.h>
30 #include <stdlib.h>
31 #include <string.h>
32
33 #include "agent.h"
34 #include "debug.h"
35
36 static int
agent_cmp_func(const void * a1,const void * a2)37 agent_cmp_func(const void *a1, const void *a2)
38 {
39 struct agent const *ap1 = *((struct agent const **)a1);
40 struct agent const *ap2 = *((struct agent const **)a2);
41 int res;
42
43 res = strcmp(ap1->name, ap2->name);
44 if (res == 0) {
45 if (ap1->type == ap2->type)
46 res = 0;
47 else if (ap1->type < ap2->type)
48 res = -1;
49 else
50 res = 1;
51 }
52
53 return (res);
54 }
55
56 struct agent_table *
init_agent_table(void)57 init_agent_table(void)
58 {
59 struct agent_table *retval;
60
61 TRACE_IN(init_agent_table);
62 retval = calloc(1, sizeof(*retval));
63 assert(retval != NULL);
64
65 TRACE_OUT(init_agent_table);
66 return (retval);
67 }
68
69 void
register_agent(struct agent_table * at,struct agent * a)70 register_agent(struct agent_table *at, struct agent *a)
71 {
72 struct agent **new_agents;
73 size_t new_agents_num;
74
75 TRACE_IN(register_agent);
76 assert(at != NULL);
77 assert(a != NULL);
78 new_agents_num = at->agents_num + 1;
79 new_agents = malloc(sizeof(*new_agents) *
80 new_agents_num);
81 assert(new_agents != NULL);
82 memcpy(new_agents, at->agents, at->agents_num * sizeof(struct agent *));
83 new_agents[new_agents_num - 1] = a;
84 qsort(new_agents, new_agents_num, sizeof(struct agent *),
85 agent_cmp_func);
86
87 free(at->agents);
88 at->agents = new_agents;
89 at->agents_num = new_agents_num;
90 TRACE_OUT(register_agent);
91 }
92
93 struct agent *
find_agent(struct agent_table * at,const char * name,enum agent_type type)94 find_agent(struct agent_table *at, const char *name, enum agent_type type)
95 {
96 struct agent **res;
97 struct agent model, *model_p;
98
99 TRACE_IN(find_agent);
100 model.name = (char *)name;
101 model.type = type;
102 model_p = &model;
103 res = bsearch(&model_p, at->agents, at->agents_num,
104 sizeof(struct agent *), agent_cmp_func);
105
106 TRACE_OUT(find_agent);
107 return ( res == NULL ? NULL : *res);
108 }
109
110 void
destroy_agent_table(struct agent_table * at)111 destroy_agent_table(struct agent_table *at)
112 {
113 size_t i;
114
115 TRACE_IN(destroy_agent_table);
116 assert(at != NULL);
117 for (i = 0; i < at->agents_num; ++i) {
118 free(at->agents[i]->name);
119 free(at->agents[i]);
120 }
121
122 free(at->agents);
123 free(at);
124 TRACE_OUT(destroy_agent_table);
125 }
126