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
36static int
37agent_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
56struct agent_table *
57init_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
69void
70register_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
93struct agent *
94find_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
110void
111destroy_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