d_opendb.c

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/*!
 * \file db/dbmi_driver/d_opendb.c
 *
 * \brief DBMI Library (driver) - open database connection
 *
 * (C) 1999-2008 by the GRASS Development Team
 *
 * This program is free software under the GNU General Public
 * License (>=v2). Read the file COPYING that comes with GRASS
 * for details.
 *
 * \author Joel Jones (CERL/UIUC), Radim Blazek
 */
 
#include <stdlib.h>
#include <grass/dbmi.h>
#include "macros.h"
#include "dbstubs.h"
 
/*!
   \brief Open database connection
 
   \return DB_OK on success
   \return DB_FAILED on failure
 */
int db_d_open_database(void)
{
    dbHandle handle;
    int stat;
 
    /* get the arg(s) */
    db_init_handle(&handle);
    DB_RECV_HANDLE(&handle);
 
    /* see if there is a database already open */
    if (db__test_database_open()) {
        db_error("Multiple open databases not allowed");
        DB_SEND_FAILURE();
        return DB_OK;
    }
 
    /* call the procedure */
    stat = db_driver_open_database(&handle);
 
    /* send the return code */
    if (stat != DB_OK) {
        db_free_handle(&handle);
        DB_SEND_FAILURE();
        return DB_OK;
    }
    DB_SEND_SUCCESS();
 
    /* record the open in the driver state */
    db__mark_database_open(db_get_handle_dbname(&handle),
                           db_get_handle_dbschema(&handle));
    /* DO NOT free the handle since we saved the pointers to the name,path */
 
    /* no results */
    return DB_OK;
}