lwgeom_from_gserialized2()

LWGEOM * lwgeom_from_gserialized2

(

const GSERIALIZED *

g

)

Allocate a new LWGEOM from a GSERIALIZED.

The resulting LWGEOM will have coordinates that are double aligned and suitable for direct reading using getPoint2d_cp

Definition at line 1498 of file gserialized2.c.

{
        lwflags_t lwflags = 0;
        int32_t srid = 0;
        uint32_t lwtype = 0;
        uint8_t *data_ptr = NULL;
        LWGEOM *lwgeom = NULL;
        GBOX bbox;
        size_t size = 0;
 
        assert(g);
 
        srid = gserialized2_get_srid(g);
        lwtype = gserialized2_get_type(g);
        lwflags = gserialized2_get_lwflags(g);
 
        LWDEBUGF(4, "Got type %d (%s), srid=%d", lwtype, lwtype_name(lwtype), srid);
 
        data_ptr = (uint8_t*)g->data;
 
        /* Skip optional flags */
        if (G2FLAGS_GET_EXTENDED(g->gflags))
        {
                data_ptr += sizeof(uint64_t);
        }
 
        /* Skip over optional bounding box */
        if (FLAGS_GET_BBOX(lwflags))
                data_ptr += gbox_serialized_size(lwflags);
 
        lwgeom = lwgeom_from_gserialized2_buffer(data_ptr, lwflags, &size, srid);
 
        if (!lwgeom)
                lwerror("%s: unable create geometry", __func__); /* Ooops! */
 
        lwgeom->type = lwtype;
        lwgeom->flags = lwflags;
 
        if (gserialized2_read_gbox_p(g, &bbox) == LW_SUCCESS)
        {
                lwgeom->bbox = gbox_copy(&bbox);
        }
        else if (lwgeom_needs_bbox(lwgeom) && (lwgeom_calculate_gbox(lwgeom, &bbox) == LW_SUCCESS))
        {
                lwgeom->bbox = gbox_copy(&bbox);
        }
        else
        {
                lwgeom->bbox = NULL;
        }
 
        return lwgeom;
}

References LWGEOM::bbox, GSERIALIZED::data, LWGEOM::flags, FLAGS_GET_BBOX, G2FLAGS_GET_EXTENDED, gbox_copy(), gbox_serialized_size(), GSERIALIZED::gflags, gserialized2_get_lwflags(), gserialized2_get_srid(), gserialized2_get_type(), gserialized2_read_gbox_p(), LW_SUCCESS, LWDEBUGF, lwerror(), lwflags(), lwgeom_calculate_gbox(), lwgeom_from_gserialized2_buffer(), lwgeom_needs_bbox(), lwtype_name(), and LWGEOM::type.

Referenced by lwgeom_from_gserialized(), test_gserialized2_extended_flags(), test_lwgeom_from_gserialized2(), and test_on_gser2_lwgeom_count_vertices().

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