GRASS GIS 8 Programmer's Manual
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Pages
c_rows.c
Go to the documentation of this file.
1
/*!
2
* \file db/dbmi_client/c_rows.c
3
*
4
* \brief DBMI Library (client) - get number of records
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 <
grass/dbmi.h
>
16
#include "
macros.h
"
17
18
/*!
19
\brief Get number of selected rows
20
21
\param cursor db select cursor
22
23
\return DB_OK on success
24
\return DB_FAILED on failure
25
*/
26
int
db_get_num_rows
(
dbCursor
*cursor)
27
{
28
int
nrows, ret_code;
29
30
/* start the procedure call */
31
db__set_protocol_fds
(cursor->
driver
->
send
, cursor->
driver
->
recv
);
32
DB_START_PROCEDURE_CALL
(
DB_PROC_ROWS
);
33
34
/* send the argument(s) to the procedure */
35
DB_SEND_TOKEN
(&cursor->
token
);
36
37
/* get the return code for the procedure call */
38
DB_RECV_RETURN_CODE
(&ret_code);
39
40
if
(ret_code !=
DB_OK
)
41
return
-1;
42
43
/* get the results */
44
DB_RECV_INT
(&nrows);
45
46
return
nrows;
47
}
db_get_num_rows
int db_get_num_rows(dbCursor *cursor)
Get number of selected rows.
Definition:
c_rows.c:26
dbmi.h
DB_PROC_ROWS
#define DB_PROC_ROWS
Definition:
dbmi.h:45
DB_OK
#define DB_OK
Definition:
dbmi.h:71
db__set_protocol_fds
void db__set_protocol_fds(FILE *, FILE *)
?
Definition:
db/dbmi_base/xdr.c:75
macros.h
DB_RECV_INT
#define DB_RECV_INT(x)
Definition:
macros.h:87
DB_START_PROCEDURE_CALL
#define DB_START_PROCEDURE_CALL(x)
Definition:
macros.h:2
DB_RECV_RETURN_CODE
#define DB_RECV_RETURN_CODE(x)
Definition:
macros.h:7
DB_SEND_TOKEN
#define DB_SEND_TOKEN(x)
Definition:
macros.h:214
_db_cursor
Definition:
dbmi.h:221
_db_cursor::driver
dbDriver * driver
Definition:
dbmi.h:223
_db_cursor::token
dbToken token
Definition:
dbmi.h:222
_db_driver::recv
FILE * recv
Definition:
dbmi.h:167
_db_driver::send
FILE * send
Definition:
dbmi.h:167
lib
db
dbmi_client
c_rows.c
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