agent.c revision 183770 
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: head/usr.sbin/nscd/agent.c 183770 2008-10-12 00:44:27Z delphij $");
30
31#include <assert.h>
32#include <string.h>
33#include <stdlib.h>
34#include "agent.h"
35#include "debug.h"
36
37static int
38agent_cmp_func(const void *a1, const void *a2)
39{
40   	struct agent const *ap1 = *((struct agent const **)a1);
41	struct agent const *ap2 = *((struct agent const **)a2);
42	int res;
43
44	res = strcmp(ap1->name, ap2->name);
45	if (res == 0) {
46		if (ap1->type == ap2->type)
47			res = 0;
48		else if (ap1->type < ap2->type)
49			res = -1;
50		else
51			res = 1;
52	}
53
54	return (res);
55}
56
57struct agent_table *
58init_agent_table()
59{
60   	struct agent_table	*retval;
61
62	TRACE_IN(init_agent_table);
63	retval = (struct agent_table *)calloc(1, sizeof(struct agent_table));
64	assert(retval != NULL);
65
66	TRACE_OUT(init_agent_table);
67	return (retval);
68}
69
70void
71register_agent(struct agent_table *at, struct agent *a)
72{
73	struct agent **new_agents;
74    	size_t new_agents_num;
75
76	TRACE_IN(register_agent);
77	assert(at != NULL);
78	assert(a != NULL);
79	new_agents_num = at->agents_num + 1;
80	new_agents = (struct agent **)malloc(sizeof(struct agent *) *
81		new_agents_num);
82	assert(new_agents != NULL);
83	memcpy(new_agents, at->agents, at->agents_num * sizeof(struct agent *));
84	new_agents[new_agents_num - 1] = a;
85	qsort(new_agents, new_agents_num, sizeof(struct agent *),
86		agent_cmp_func);
87
88	free(at->agents);
89	at->agents = new_agents;
90	at->agents_num = new_agents_num;
91    	TRACE_OUT(register_agent);
92}
93
94struct agent *
95find_agent(struct agent_table *at, const char *name, enum agent_type type)
96{
97	struct agent **res;
98	struct agent model, *model_p;
99
100	TRACE_IN(find_agent);
101	model.name = (char *)name;
102	model.type = type;
103	model_p = &model;
104	res = bsearch(&model_p, at->agents, at->agents_num,
105		sizeof(struct agent *), agent_cmp_func);
106
107	TRACE_OUT(find_agent);
108	return ( res == NULL ? NULL : *res);
109}
110
111void
112destroy_agent_table(struct agent_table *at)
113{
114    	size_t i;
115
116	TRACE_IN(destroy_agent_table);
117	assert(at != NULL);
118	for (i = 0; i < at->agents_num; ++i) {
119		free(at->agents[i]->name);
120		free(at->agents[i]);
121	}
122
123	free(at->agents);
124	free(at);
125	TRACE_OUT(destroy_agent_table);
126}
127