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  1. /** @addtogroup sctrace
  2.  * @{
  3.  */
  4. /** @file
  5.  */
  6.  
  7. #include <stdio.h>
  8. #include <stdlib.h>
  9. #include <libadt/hash_table.h>
  10.  
  11. #include "proto.h"
  12.  
  13. #define SRV_PROTO_TABLE_CHAINS 32
  14.  
  15. hash_table_t srv_proto;
  16.  
  17. typedef struct {
  18.     int srv;
  19.     proto_t *proto;
  20.     link_t link;
  21. } srv_proto_t;
  22.  
  23. hash_index_t srv_proto_hash(unsigned long key[])
  24. {
  25.     return key[0] % SRV_PROTO_TABLE_CHAINS;
  26. }
  27.  
  28. int srv_proto_compare(unsigned long key[], hash_count_t keys,
  29.     link_t *item)
  30. {
  31.     srv_proto_t *sp;
  32.  
  33.     sp = hash_table_get_instance(item, srv_proto_t, link);
  34.  
  35.     return key[0] == sp->srv;
  36. }
  37.  
  38. void srv_proto_remove_callback(link_t *item)
  39. {
  40. }
  41.  
  42. hash_table_operations_t srv_proto_ops = {
  43.     .hash = srv_proto_hash,
  44.     .compare = srv_proto_compare,
  45.     .remove_callback = srv_proto_remove_callback
  46. };
  47.  
  48. void proto_init(void)
  49. {
  50.     hash_table_create(&srv_proto, SRV_PROTO_TABLE_CHAINS, 1,
  51.         &srv_proto_ops);
  52. }
  53.  
  54. void proto_cleanup(void)
  55. {
  56.     hash_table_destroy(&srv_proto);
  57. }
  58.  
  59. void proto_register(int srv, proto_t *proto)
  60. {
  61.     srv_proto_t *sp;
  62.     unsigned long key;
  63.  
  64.     sp = malloc(sizeof(srv_proto_t));
  65.     sp->srv = srv;
  66.     sp->proto = proto;
  67.     key = srv;
  68.  
  69.     hash_table_insert(&srv_proto, &key, &sp->link);
  70. }
  71.  
  72. proto_t *proto_get_by_srv(int srv)
  73. {
  74.     unsigned long key;
  75.     link_t *item;
  76.     srv_proto_t *sp;
  77.  
  78.     key = srv;
  79.     item = hash_table_find(&srv_proto, &key);
  80.     if (item == NULL) return NULL;
  81.  
  82.     sp = hash_table_get_instance(item, srv_proto_t, link);
  83.     return sp->proto;
  84. }
  85.  
  86. /** @}
  87.  */
  88.