GRASS GIS 7 Programmer's Manual  7.5.svn(2017)-r71933
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d_opendb.c
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1 /*!
2  * \file db/dbmi_driver/d_opendb.c
3  *
4  * \brief DBMI Library (driver) - open database connection
5  *
6  * (C) 1999-2008 by the GRASS Development Team
7  *
8  * This program is free software under the GNU General Public
9  * License (>=v2). Read the file COPYING that comes with GRASS
10  * for details.
11  *
12  * \author Joel Jones (CERL/UIUC), Radim Blazek
13  */
14 
15 #include <stdlib.h>
16 #include <grass/dbmi.h>
17 #include "macros.h"
18 #include "dbstubs.h"
19 
20 /*!
21  \brief Open database connection
22 
23  \return DB_OK on success
24  \return DB_FAILED on failure
25  */
27 {
28  dbHandle handle;
29  int stat;
30 
31  /* get the arg(s) */
32  db_init_handle(&handle);
33  DB_RECV_HANDLE(&handle);
34 
35  /* see if there is a database already open */
36  if (db__test_database_open()) {
37  db_error("Multiple open databases not allowed");
39  return DB_OK;
40  }
41 
42  /* call the procedure */
43  stat = db_driver_open_database(&handle);
44 
45  /* send the return code */
46  if (stat != DB_OK) {
47  db_free_handle(&handle);
49  return DB_OK;
50  }
52 
53  /* record the open in the driver state */
55  db_get_handle_dbschema(&handle));
56  /* DO NOT free the handle since we saved the pointers to the name,path */
57 
58  /* no results */
59  return DB_OK;
60 }
int db_d_open_database(void)
Open database connection.
Definition: d_opendb.c:26
void db_free_handle(dbHandle *handle)
Free dbHandle structure.
Definition: handle.c:79
#define DB_RECV_HANDLE(x)
Definition: macros.h:59
const char * db_get_handle_dbschema(dbHandle *handle)
Get handle schema name.
Definition: handle.c:69
int(* db_driver_open_database)(dbHandle *)
#define DB_SEND_FAILURE()
Definition: macros.h:9
void db__mark_database_open(const char *dbname, const char *dbschema)
Mark database as opened.
Definition: driver_state.c:57
int db__test_database_open(void)
Test database connection.
Definition: driver_state.c:46
void db_init_handle(dbHandle *handle)
Initialize handle (i.e database/schema)
Definition: handle.c:23
#define DB_SEND_SUCCESS()
Definition: macros.h:7
const char * db_get_handle_dbname(dbHandle *handle)
Get handle database name.
Definition: handle.c:57
void db_error(const char *s)
Report error message.
#define DB_OK
Definition: dbmi.h:71