int llopen(unsigned int port, unsigned int flag) {
if (init_link(port))
return -1;
linklayer.flag = flag;
int fd = open_port_file(port);
if (flag == RECEIVER) {
if (rec_set(fd))
return -1;
if (send_ua(fd, flag))
return -1;
} else if (flag == SENDER) {
if (send_set(fd))
return -1;
if (rec_ua(fd, flag))
return -1;
} else {
printf("ENTER A VALID STATUS!\n");
close_port_file(fd);
return -1;
}
initialized = -1;
return fd;
}
// perform sql statement
db_query_basic::list_rec_set_t db_query_basic::perform(std::string query)
{
if (query.empty())
return list_rec_set_t();
// replace "%table_name%" to table_name
//query = std::regex_replace(query, std::regex("\\%table_name%"), _table);
int ret = mysql_real_query(_db.conn(), query.c_str(), static_cast<unsigned long>(query.length()));
assert_ret(ret);
list_rec_set_t list_rec_set;
int status = 0;
do
{
size_t num_col = mysql_field_count(_db.conn());
MYSQL_RES* res = mysql_store_result(_db.conn());
size_t affected = static_cast<size_t>(mysql_affected_rows(_db.conn()));
if (res == nullptr)
{
// raise exception if result is supposed to be returned
if (num_col > 0)
throw ex_db_mariadb(_db.conn());
db_record_meta::list_column_t list_col_empty;
db_record_meta meta_empty(list_col_empty);
db_record_set rec_set_empty(meta_empty);
rec_set_empty._affected = affected;
list_rec_set.push_back(rec_set_empty);
}
else // when MYSQL_RES* available
{
MYSQL_FIELD* p_col = mysql_fetch_fields(res);
db_record_set rec_set(db_record_meta(p_col, num_col));
for (size_t idx_row = 0; idx_row < res->row_count; idx_row++)
{
assert_res(res);
const MYSQL_ROW row = mysql_fetch_row(res);
assert_row(row);
record_t rec_d = rec_set.record_new();
for (size_t idx_col = 0; idx_col < num_col; idx_col++)
rec_d[idx_col] = (row[idx_col] == nullptr ? "" : row[idx_col]);
rec_set.list_record().push_back(rec_d);
}
rec_set._affected = res->row_count;
list_rec_set.push_back(rec_set);
mysql_free_result(res);
}
// check whether there are more result sets:
// status > 0 error occurred;
// status = 0 more result sets returned;
// status < 0 no next result set;
if ((status = mysql_next_result(_db.conn())) > 0)
throw ex_db_mariadb(_db.conn());
} while (status == 0);
return list_rec_set;
}