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 * $FreeBSD: src/usr.sbin/nscd/agent.c,v 1.3 2008/10/12 00:44:27 delphij Exp $ 27 */ 28 29 #include <assert.h> 30 #include <string.h> 31 #include <stdlib.h> 32 #include "agent.h" 33 #include "debug.h" 34 35 static int 36 agent_cmp_func(const void *a1, const void *a2) 37 { 38 struct agent const *ap1 = *((struct agent const **)a1); 39 struct agent const *ap2 = *((struct agent const **)a2); 40 int res; 41 42 res = strcmp(ap1->name, ap2->name); 43 if (res == 0) { 44 if (ap1->type == ap2->type) 45 res = 0; 46 else if (ap1->type < ap2->type) 47 res = -1; 48 else 49 res = 1; 50 } 51 52 return (res); 53 } 54 55 struct agent_table * 56 init_agent_table(void) 57 { 58 struct agent_table *retval; 59 60 TRACE_IN(init_agent_table); 61 retval = (struct agent_table *)calloc(1, sizeof(struct agent_table)); 62 assert(retval != NULL); 63 64 TRACE_OUT(init_agent_table); 65 return (retval); 66 } 67 68 void 69 register_agent(struct agent_table *at, struct agent *a) 70 { 71 struct agent **new_agents; 72 size_t new_agents_num; 73 74 TRACE_IN(register_agent); 75 assert(at != NULL); 76 assert(a != NULL); 77 new_agents_num = at->agents_num + 1; 78 new_agents = (struct agent **)malloc(sizeof(struct agent *) * 79 new_agents_num); 80 assert(new_agents != NULL); 81 memcpy(new_agents, at->agents, at->agents_num * sizeof(struct agent *)); 82 new_agents[new_agents_num - 1] = a; 83 qsort(new_agents, new_agents_num, sizeof(struct agent *), 84 agent_cmp_func); 85 86 free(at->agents); 87 at->agents = new_agents; 88 at->agents_num = new_agents_num; 89 TRACE_OUT(register_agent); 90 } 91 92 struct agent * 93 find_agent(struct agent_table *at, const char *name, enum agent_type type) 94 { 95 struct agent **res; 96 struct agent model, *model_p; 97 98 TRACE_IN(find_agent); 99 model.name = (char *)name; 100 model.type = type; 101 model_p = &model; 102 res = bsearch(&model_p, at->agents, at->agents_num, 103 sizeof(struct agent *), agent_cmp_func); 104 105 TRACE_OUT(find_agent); 106 return ( res == NULL ? NULL : *res); 107 } 108 109 void 110 destroy_agent_table(struct agent_table *at) 111 { 112 size_t i; 113 114 TRACE_IN(destroy_agent_table); 115 assert(at != NULL); 116 for (i = 0; i < at->agents_num; ++i) { 117 free(at->agents[i]->name); 118 free(at->agents[i]); 119 } 120 121 free(at->agents); 122 free(at); 123 TRACE_OUT(destroy_agent_table); 124 } 125