gserialized1_peek_first_point()

int gserialized1_peek_first_point	(	const GSERIALIZED *	g,
		POINT4D *	out_point
	)

Definition at line 491 of file gserialized1.c.

{
        uint8_t *geometry_start = ((uint8_t *)g->data);
        if (gserialized1_has_bbox(g))
        {
                geometry_start += gserialized1_box_size(g);
        }
 
        uint32_t isEmpty = (((uint32_t *)geometry_start)[1]) == 0;
        if (isEmpty)
        {
                return LW_FAILURE;
        }
 
        uint32_t type = (((uint32_t *)geometry_start)[0]);
        /* Setup double_array_start depending on the geometry type */
        double *double_array_start = NULL;
        switch (type)
        {
        case (POINTTYPE):
                /* For points we only need to jump over the type and npoints 32b ints */
                double_array_start = (double *)(geometry_start + 2 * sizeof(uint32_t));
                break;
 
        default:
                lwerror("%s is currently not implemented for type %d", __func__, type);
                return LW_FAILURE;
        }
 
        gserialized1_copy_point(double_array_start, g->gflags, out_point);
        return LW_SUCCESS;
}

References GSERIALIZED::data, GSERIALIZED::gflags, gserialized1_box_size(), gserialized1_copy_point(), gserialized1_has_bbox(), LW_FAILURE, LW_SUCCESS, lwerror(), and POINTTYPE.

Referenced by gserialized_peek_first_point(), and peek1_point_helper().

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