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 <stdlib.h> 33 #include <string.h> 34 35 #include "agent.h" 36 #include "debug.h" 37 38 static int 39 agent_cmp_func(const void *a1, const void *a2) 40 { 41 struct agent const *ap1 = *((struct agent const **)a1); 42 struct agent const *ap2 = *((struct agent const **)a2); 43 int res; 44 45 res = strcmp(ap1->name, ap2->name); 46 if (res == 0) { 47 if (ap1->type == ap2->type) 48 res = 0; 49 else if (ap1->type < ap2->type) 50 res = -1; 51 else 52 res = 1; 53 } 54 55 return (res); 56 } 57 58 struct agent_table * 59 init_agent_table(void) 60 { 61 struct agent_table *retval; 62 63 TRACE_IN(init_agent_table); 64 retval = calloc(1, sizeof(*retval)); 65 assert(retval != NULL); 66 67 TRACE_OUT(init_agent_table); 68 return (retval); 69 } 70 71 void 72 register_agent(struct agent_table *at, struct agent *a) 73 { 74 struct agent **new_agents; 75 size_t new_agents_num; 76 77 TRACE_IN(register_agent); 78 assert(at != NULL); 79 assert(a != NULL); 80 new_agents_num = at->agents_num + 1; 81 new_agents = malloc(sizeof(*new_agents) * 82 new_agents_num); 83 assert(new_agents != NULL); 84 memcpy(new_agents, at->agents, at->agents_num * sizeof(struct agent *)); 85 new_agents[new_agents_num - 1] = a; 86 qsort(new_agents, new_agents_num, sizeof(struct agent *), 87 agent_cmp_func); 88 89 free(at->agents); 90 at->agents = new_agents; 91 at->agents_num = new_agents_num; 92 TRACE_OUT(register_agent); 93 } 94 95 struct agent * 96 find_agent(struct agent_table *at, const char *name, enum agent_type type) 97 { 98 struct agent **res; 99 struct agent model, *model_p; 100 101 TRACE_IN(find_agent); 102 model.name = (char *)name; 103 model.type = type; 104 model_p = &model; 105 res = bsearch(&model_p, at->agents, at->agents_num, 106 sizeof(struct agent *), agent_cmp_func); 107 108 TRACE_OUT(find_agent); 109 return ( res == NULL ? NULL : *res); 110 } 111 112 void 113 destroy_agent_table(struct agent_table *at) 114 { 115 size_t i; 116 117 TRACE_IN(destroy_agent_table); 118 assert(at != NULL); 119 for (i = 0; i < at->agents_num; ++i) { 120 free(at->agents[i]->name); 121 free(at->agents[i]); 122 } 123 124 free(at->agents); 125 free(at); 126 TRACE_OUT(destroy_agent_table); 127 } 128