lwpointiterator_modify_next()

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

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 226 of file lwiterator.c.

References LWPOINTITERATOR::allow_modification, LWPOINTITERATOR::i, LISTNODE::item, LW_FAILURE, LW_SUCCESS, lwerror(), lwpointiterator_advance(), lwpointiterator_has_next(), LWPOINTITERATOR::pointarrays, and ptarray_set_point4d().

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

{
        if (!lwpointiterator_has_next(s))
                return LW_FAILURE;

        if (!s->allow_modification)
        {
                lwerror("Cannot write to read-only iterator");
                return LW_FAILURE;
        }

        ptarray_set_point4d(s->pointarrays->item, s->i, p);

        lwpointiterator_advance(s);
        return LW_SUCCESS;
}

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