lwpointiterator_modify_next()

int lwpointiterator_modify_next ( LWPOINTITERATOR *  s, const POINT4D *  p  )

extern

Attempts to replace the next point int the iterator with p, and advances the iterator to the next point.

Returns LW_SUCCESS if the assignment was successful, LW_FAILURE otherwise.

Definition at line 224 of file lwiterator.c.

{
        if (!lwpointiterator_has_next(s))
                return LW_FAILURE;
 
        if (!s->allow_modification)
        {
                lwerror("Cannot write to read-only iterator");
                return LW_FAILURE;
        }
 
        POINTARRAY *pa = (POINTARRAY *)(s->pointarrays->item);
        ptarray_set_point4d(pa, s->i, p);
 
        lwpointiterator_advance(s);
        return LW_SUCCESS;
}

References LW_FAILURE, LW_SUCCESS, lwerror(), lwpointiterator_advance(), lwpointiterator_has_next(), ptarray_set_point4d(), and s.

Referenced by lwgeom_trim_bits_in_place(), rt_raster_copy_to_geometry(), test_cannot_modify_read_only(), test_mixed_rw_access(), and test_modification().

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