ptarray_construct_reference_data()

POINTARRAY* ptarray_construct_reference_data	(	char	hasz,
		char	hasm,
		uint32_t	npoints,
		uint8_t *	ptlist
	)

Build a new POINTARRAY, but on top of someone else's ordinate array.

Construct a new POINTARRAY, referencing to the data from ptlist.

Flag as read-only, so that ptarray_free() does not free the serialized_ptlist

Definition at line 295 of file ptarray.c.

References POINTARRAY::flags, FLAGS_SET_READONLY, gflags(), lwalloc(), LWDEBUGF, POINTARRAY::maxpoints, POINTARRAY::npoints, and POINTARRAY::serialized_pointlist.

Referenced by lwcircstring_from_gserialized_buffer(), lwcircstring_from_lwmpoint(), lwcircstring_from_lwpointarray(), lwline_from_gserialized_buffer(), lwpoint_from_gserialized_buffer(), lwpoly_from_gserialized_buffer(), lwtriangle_from_gserialized_buffer(), and test_gbox_from_spherical_coordinates().

{
        POINTARRAY *pa = lwalloc(sizeof(POINTARRAY));
        LWDEBUGF(5, "hasz = %d, hasm = %d, npoints = %d, ptlist = %p", hasz, hasm, npoints, ptlist);
        pa->flags = gflags(hasz, hasm, 0);
        FLAGS_SET_READONLY(pa->flags, 1); /* We don't own this memory, so we can't alter or free it. */
        pa->npoints = npoints;
        pa->maxpoints = npoints;
        pa->serialized_pointlist = ptlist;
        return pa;
}

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