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 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 * 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 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 * 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 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