getPoint_internal()

uint8_t* getPoint_internal	(	const POINTARRAY *	pa,
		int	n
	)

Definition at line 1753 of file ptarray.c.

References POINTARRAY::flags, FLAGS_NDIMS, LWDEBUGF, lwerror(), POINTARRAY::maxpoints, POINTARRAY::npoints, ptarray_point_size(), and POINTARRAY::serialized_pointlist.

Referenced by circ_node_leaf_new(), circ_node_leaf_point_new(), getPoint2d_cp(), getPoint2d_p(), getPoint2d_p_ro(), getPoint3dm_p(), getPoint3dz_cp(), getPoint3dz_p(), getPoint4d_cp(), getPoint4d_p(), gserialized_from_lwcircstring(), gserialized_from_lwline(), gserialized_from_lwpoint(), gserialized_from_lwpoly(), gserialized_from_lwtriangle(), lwcircstring_addpoint(), lwcircstring_from_lwmpoint(), lwcircstring_from_lwpointarray(), lwcompound_is_closed(), LWGEOM2GEOS(), lwline_make_geos_friendly(), parse_gml_curve(), ptarray_addPoint(), ptarray_append_ptarray(), ptarray_calc_areas(), ptarray_close2d(), ptarray_copy_point(), ptarray_insert_point(), ptarray_is_closed(), ptarray_is_closed_2d(), ptarray_is_closed_3d(), ptarray_longitude_shift(), ptarray_merge(), ptarray_remove_point(), ptarray_removePoint(), ptarray_reverse(), ptarray_same(), ptarray_set_point4d(), ptarray_to_twkb_buf(), ptarray_to_wkb_buf(), ptarray_to_wkt_sb(), rect_node_leaf_new(), ring_make_geos_friendly(), and tune_areas().

{
        size_t size;
        uint8_t *ptr;

#if PARANOIA_LEVEL > 0
        if ( pa == NULL )
        {
                lwerror("%s [%d] got NULL pointarray", __FILE__, __LINE__);
                return NULL;
        }

        LWDEBUGF(5, "(n=%d, pa.npoints=%d, pa.maxpoints=%d)",n,pa->npoints,pa->maxpoints);

        if ( ( n < 0 ) ||
             ( n > pa->npoints ) ||
             ( n >= pa->maxpoints ) )
        {
                lwerror("%s [%d] called outside of ptarray range (n=%d, pa.npoints=%d, pa.maxpoints=%d)", __FILE__, __LINE__, n, pa->npoints, pa->maxpoints);
                return NULL; /*error */
        }
#endif

        size = ptarray_point_size(pa);

        ptr = pa->serialized_pointlist + size * n;
        if ( FLAGS_NDIMS(pa->flags) == 2)
        {
                LWDEBUGF(5, "point = %g %g", *((double*)(ptr)), *((double*)(ptr+8)));
        }
        else if ( FLAGS_NDIMS(pa->flags) == 3)
        {
                LWDEBUGF(5, "point = %g %g %g", *((double*)(ptr)), *((double*)(ptr+8)), *((double*)(ptr+16)));
        }
        else if ( FLAGS_NDIMS(pa->flags) == 4)
        {
                LWDEBUGF(5, "point = %g %g %g %g", *((double*)(ptr)), *((double*)(ptr+8)), *((double*)(ptr+16)), *((double*)(ptr+24)));
        }

        return ptr;
}

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