gserialized_read_gbox_p()

int gserialized_read_gbox_p	(	const GSERIALIZED *	g,
		GBOX *	gbox
	)

Pull a GBOX from the header of a GSERIALIZED, if one is available.

If it is not, return LW_FAILURE.

Definition at line 414 of file g_serialized.c.

{
 
        /* Null input! */
        if ( ! ( g && gbox ) ) return LW_FAILURE;
 
        /* Initialize the flags on the box */
        gbox->flags = g->flags;
 
        /* Has pre-calculated box */
        if ( FLAGS_GET_BBOX(g->flags) )
        {
                int i = 0;
                float *fbox = (float*)(g->data);
                gbox->xmin = fbox[i++];
                gbox->xmax = fbox[i++];
                gbox->ymin = fbox[i++];
                gbox->ymax = fbox[i++];
 
                /* Geodetic? Read next dimension (geocentric Z) and return */
                if ( FLAGS_GET_GEODETIC(g->flags) )
                {
                        gbox->zmin = fbox[i++];
                        gbox->zmax = fbox[i++];
                        return LW_SUCCESS;
                }
                /* Cartesian? Read extra dimensions (if there) and return */
                if ( FLAGS_GET_Z(g->flags) )
                {
                        gbox->zmin = fbox[i++];
                        gbox->zmax = fbox[i++];
                }
                if ( FLAGS_GET_M(g->flags) )
                {
                        gbox->mmin = fbox[i++];
                        gbox->mmax = fbox[i++];
                }
                return LW_SUCCESS;
        }
 
        return LW_FAILURE;
}

References GSERIALIZED::data, GBOX::flags, GSERIALIZED::flags, FLAGS_GET_BBOX, FLAGS_GET_GEODETIC, FLAGS_GET_M, FLAGS_GET_Z, LW_FAILURE, LW_SUCCESS, GBOX::mmax, GBOX::mmin, GBOX::xmax, GBOX::xmin, GBOX::ymax, GBOX::ymin, GBOX::zmax, and GBOX::zmin.

Referenced by gserialized_get_gbox_p(), lwgeom_from_gserialized(), and test_gbox_same_2d().

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