GRASS GIS 8 Programmer's Manual
8.2.2dev(2023)-3d2c704037
d_rows.c
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/*!
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* \file db/dbmi_driver/d_rows.c
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*
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* \brief DBMI Library (driver) - get number of records
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*
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* (C) 1999-2008 by the GRASS Development Team
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*
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* This program is free software under the GNU General Public
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* License (>=v2). Read the file COPYING that comes with GRASS
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* for details.
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*
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* \author Joel Jones (CERL/UIUC), Radim Blazek
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*/
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#include <
grass/dbmi.h
>
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#include "
macros.h
"
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#include "
dbstubs.h
"
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/*!
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\brief Get number of selected rows
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\return DB_OK on success
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\return DB_FAILED on failure
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*/
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int
db_d_get_num_rows
(
void
)
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{
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dbToken
token;
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dbCursor
*cursor;
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int
nrows;
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/* get the arg(s) */
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DB_RECV_TOKEN
(&token);
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cursor = (
dbCursor
*)
db_find_token
(token);
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/* call the procedure */
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nrows =
db_driver_get_num_rows
(cursor);
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/* send the return code */
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if
(nrows < 0) {
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DB_SEND_FAILURE
();
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return
DB_OK
;
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}
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DB_SEND_SUCCESS
();
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/* results */
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DB_SEND_INT
(nrows);
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return
DB_OK
;
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}
DB_SEND_INT
#define DB_SEND_INT(x)
Definition:
macros.h:37
DB_RECV_TOKEN
#define DB_RECV_TOKEN(x)
Definition:
macros.h:99
_db_cursor
Definition:
dbmi.h:230
dbToken
int dbToken
Definition:
dbmi.h:145
dbmi.h
db_d_get_num_rows
int db_d_get_num_rows(void)
Get number of selected rows.
Definition:
d_rows.c:25
macros.h
DB_SEND_FAILURE
#define DB_SEND_FAILURE()
Definition:
macros.h:9
dbstubs.h
db_find_token
dbAddress db_find_token(dbToken)
Find token.
Definition:
db/dbmi_base/token.c:30
DB_SEND_SUCCESS
#define DB_SEND_SUCCESS()
Definition:
macros.h:7
db_driver_get_num_rows
int(* db_driver_get_num_rows)(dbCursor *)
DB_OK
#define DB_OK
Definition:
dbmi.h:71
lib
db
dbmi_driver
d_rows.c
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