/*****************************************************************************
*
* MODULE:       OGR driver 
*   	    	
* AUTHOR(S):    Radim Blazek
*
* PURPOSE:      DB driver for OGR sources     
*
* COPYRIGHT:    (C) 2004 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.
*
*****************************************************************************/
#include <stdio.h>
#include <grass/gis.h>
#include <grass/dbmi.h>
#include "ogr_api.h"
#include "globals.h"
#include "proto.h"

int
db__driver_close_cursor( dbCursor *dbc )
{
    cursor *c;

    G_debug ( 3, "db_driver_close_cursor()" );

    init_error();

    /* get my cursor via the dbc token */
    c = (cursor *) db_find_token(db_get_cursor_token(dbc));
    if (c == NULL)
	return DB_FAILED;

    /* free_cursor(cursor) */
    free_cursor(c);

    G_debug ( 3, "Cursor closed" );

    return DB_OK;
}


cursor * alloc_cursor()
{
    cursor     *c;

    /* allocate the cursor */
    c = (cursor *) db_malloc(sizeof(cursor));
    if (c == NULL) {
        append_error("Cannot allocate cursor.");
        return NULL; 
    } 

    /* tokenize it */
    c->token = db_new_token(c);
    if (c->token < 0) {
        append_error("Cannot ad new token.");
        return NULL; 
    }

    c->hFeature = NULL;

    return c;
}

void free_cursor( cursor *c )
{
    if ( c->hFeature )
       OGR_F_Destroy( c->hFeature );

    if ( c->hLayer )
       OGR_DS_ReleaseResultSet( hDs, c->hLayer );

    G_free ( c->cols );
    G_free(c);  

    db_drop_token(c->token);
}