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 <string.h> 33 #include <stdlib.h> 34 #include "agent.h" 35 #include "debug.h" 36 37 static int 38 agent_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 57 struct agent_table * 58 init_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 70 void 71 register_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 94 struct agent * 95 find_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 } 110 111 void 112 destroy_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