T_KRIndex* kr_index_create(T_KRDB *ptDB,
int iIndexId, char *psIndexName,
E_KRType eIndexFieldType)
{
T_KRIndex *ptIndex = (T_KRIndex *)kr_calloc(sizeof(T_KRIndex));
if (ptIndex == NULL) {
fprintf(stderr, "kr_calloc ptIndex failed!\n");
return NULL;
}
ptIndex->ptDB = ptDB;
ptIndex->iIndexId = iIndexId;
strncpy(ptIndex->caIndexName, psIndexName, sizeof(ptIndex->caIndexName));
ptIndex->eIndexFieldType = eIndexFieldType;
KRHashFunc hash_func = (KRHashFunc )kr_get_hash_func(eIndexFieldType);
KREqualFunc equal_func = (KREqualFunc )kr_get_equal_func(eIndexFieldType);
ptIndex->pHashTable = kr_hashtable_new(hash_func, equal_func);
ptIndex->pIndexTableList = kr_list_new();
kr_list_set_match(ptIndex->pIndexTableList,
(KRCompareFunc )kr_table_indexid_match);
kr_list_add_tail(ptDB->pIndexList, ptIndex);
return ptIndex;
}
T_KRIndex* kr_create_index(T_KRDB *krdb, T_KRTable *krtable, int index_id,
char *index_name, E_KRIndexType index_type,
int index_field_id, int sort_field_id)
{
T_KRIndex *ptIndex = (T_KRIndex *)kr_calloc(sizeof(T_KRIndex));
if (ptIndex == NULL) {
fprintf(stderr, "kr_calloc ptIndex failed!\n");
return NULL;
}
ptIndex->iIndexId = index_id;
strncpy(ptIndex->caIndexName, index_name, sizeof(ptIndex->caIndexName));
ptIndex->eIndexType = index_type;
ptIndex->iIndexFieldId = index_field_id;
ptIndex->iSortFieldId = sort_field_id;
E_KRType index_field_type = krtable->ptFieldDef[index_field_id].type;
KRHashFunc hash_func = (KRHashFunc )kr_get_hash_func(index_field_type);
KREqualFunc equal_func = (KREqualFunc )kr_get_equal_func(index_field_type);
switch(ptIndex->eIndexType)
{
/* table-index build with two steps:
* 1.create new hashtable;
* 2.add index to the table-index list
*/
case KR_INDEXTYPE_TABLE:
{
ptIndex->pHashTable = kr_hashtable_new(hash_func, equal_func);
kr_list_add_tail(krtable->pIndexList, ptIndex);
break;
}
/* db-index build will be a little bit complicated...
* Check whether db-index with same index_id exists?
* exists: link hashtable to the exist one, add to table-index list;
* not: create an new hashtable, add to table-index and db-index list;
*/
case KR_INDEXTYPE_DB:
{
T_KRIndex *ptDBIndex = kr_get_db_index(krdb, index_id);
if (ptDBIndex != NULL) {
ptIndex->pHashTable = ptDBIndex->pHashTable;
kr_list_add_tail(krtable->pIndexList, ptIndex);
} else {
ptIndex->pHashTable = kr_hashtable_new(hash_func, equal_func);
kr_list_add_tail(krtable->pIndexList, ptIndex);
kr_list_add_tail(krdb->pIndexList, ptIndex);
}
break;
}
default:
{
fprintf(stderr, "Unknown index type[%c]\n", ptIndex->eIndexType);
return NULL;
}
}
return ptIndex;
}
/*create a new set*/
T_KRHashSet *kr_hashset_create(char *name, E_KRType key_type)
{
T_KRHashSet *krset = (T_KRHashSet *)kr_calloc(sizeof(T_KRHashSet));
krset->name = (char *)kr_strdup(name);
krset->type = key_type;
KRHashFunc hash_func = kr_get_hash_func(key_type);
KREqualFunc equal_func = kr_get_equal_func(key_type);
krset->set = kr_hashtable_new_full(hash_func, equal_func, kr_free, NULL);
return krset;
}