d_openselect.c

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/*!
 * \file db/dbmi_driver/d_openselect.c
 *
 * \brief DBMI Library (driver) - open select cursor
 *
 * SPDX-FileCopyrightText: 1999-2008 GRASS Development Team
 * SPDX-License-Identifier: GPL-2.0-or-later
 *
 * \author Joel Jones (CERL/UIUC), Radim Blazek
 */
 
#include <stdlib.h>
#include <grass/dbmi.h>
#include "macros.h"
#include "dbstubs.h"
 
/*!
   \brief Open select cursor
 
   \return DB_OK on success
   \return DB_FAILED on failure
 */
int db_d_open_select_cursor(void)
{
    dbCursor *cursor;
    int stat;
    dbToken token;
    dbString select;
    int mode;
 
    /* get the arg(s) */
    db_init_string(&select);
    DB_RECV_STRING(&select);
    DB_RECV_INT(&mode);
 
    /* create a cursor */
    cursor = (dbCursor *)db_malloc(sizeof(dbCursor));
    if (cursor == NULL)
        return db_get_error_code();
    token = db_new_token((dbAddress)cursor);
    if (token < 0)
        return db_get_error_code();
    db_init_cursor(cursor);
 
    /* call the procedure */
    stat = db_driver_open_select_cursor(&select, cursor, mode);
    db_free_string(&select);
 
    /* send the return code */
    if (stat != DB_OK) {
        DB_SEND_FAILURE();
        return DB_OK;
    }
    DB_SEND_SUCCESS();
 
    /* mark this as a readonly cursor */
    db_set_cursor_type_readonly(cursor);
 
    /* add this cursor to the cursors managed by the driver state */
    db__add_cursor_to_driver_state(cursor);
 
    /* results */
    DB_SEND_TOKEN(&token);
    DB_SEND_INT(cursor->type);
    DB_SEND_INT(cursor->mode);
    DB_SEND_TABLE_DEFINITION(cursor->table);
    return DB_OK;
}