parse_geojson_coord()

static int parse_geojson_coord ( json_object *  poObj, int *  hasz, POINTARRAY *  pa  )

static

Definition at line 103 of file lwin_geojson.c.

References POINTARRAY::flags, FLAGS_GET_M, FLAGS_GET_Z, geojson_lwerror(), LW_FAILURE, LW_FALSE, LW_TRUE, LWDEBUGF, POINT4D::m, ptarray_append_point(), POINT4D::x, POINT4D::y, and POINT4D::z.

Referenced by parse_geojson_linestring(), parse_geojson_multilinestring(), parse_geojson_multipoint(), parse_geojson_multipolygon(), parse_geojson_point(), and parse_geojson_polygon().

{
        POINT4D pt;

        LWDEBUGF(3, "parse_geojson_coord called for object %s.", json_object_to_json_string( poObj ) );

        if( json_type_array == json_object_get_type( poObj ) )
        {

                json_object* poObjCoord = NULL;
                const int nSize = json_object_array_length( poObj );
                LWDEBUGF(3, "parse_geojson_coord called for array size %d.", nSize );

                if ( nSize < 2 )
                {
                        geojson_lwerror("Too few ordinates in GeoJSON", 4);
                        return LW_FAILURE;
                }

                /* Read X coordinate */
                poObjCoord = json_object_array_get_idx( poObj, 0 );
                pt.x = json_object_get_double( poObjCoord );
                LWDEBUGF(3, "parse_geojson_coord pt.x = %f.", pt.x );

                /* Read Y coordinate */
                poObjCoord = json_object_array_get_idx( poObj, 1 );
                pt.y = json_object_get_double( poObjCoord );
                LWDEBUGF(3, "parse_geojson_coord pt.y = %f.", pt.y );

                if( nSize > 2 ) /* should this be >= 3 ? */
                {
                        /* Read Z coordinate */
                        poObjCoord = json_object_array_get_idx( poObj, 2 );
                        pt.z = json_object_get_double( poObjCoord );
                        LWDEBUGF(3, "parse_geojson_coord pt.z = %f.", pt.z );
                        *hasz = LW_TRUE;
                }
                else if ( nSize == 2 )
                {
                        *hasz = LW_FALSE;
                        /* Initialize Z coordinate, if required */
                        if ( FLAGS_GET_Z(pa->flags) ) pt.z = 0.0;
                }
                else
                {
                        /* TODO: should we account for nSize > 3 ? */
                        /* more than 3 coordinates, we're just dropping dimensions here... */
                }

                /* Initialize M coordinate, if required */
                if ( FLAGS_GET_M(pa->flags) ) pt.m = 0.0;

        }
        else
        {
                /* If it's not an array, just don't handle it */
                return LW_FAILURE;
        }

        return ptarray_append_point(pa, &pt, LW_TRUE);
}

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