test_mixed_rw_access()

static void test_mixed_rw_access ( void  )

static

Definition at line 163 of file cu_iterator.c.

References LW_PARSER_CHECK_NONE, lwgeom_free(), lwgeom_from_wkt(), lwpointiterator_create(), lwpointiterator_create_rw(), lwpointiterator_destroy(), lwpointiterator_has_next(), lwpointiterator_modify_next(), lwpointiterator_next(), lwpointiterator_peek(), POINT2D::x, POINT4D::x, POINT2D::y, and POINT4D::y.

Referenced by iterator_suite_setup().

{
        uint32_t i = 0;
        LWGEOM* g = lwgeom_from_wkt("GEOMETRYCOLLECTION (POINT (3 7), GEOMETRYCOLLECTION(LINESTRING (2 8, 4 3), POLYGON EMPTY, MULTIPOINT ((2 8), (17 3), EMPTY)))", LW_PARSER_CHECK_NONE);
        LWPOINTITERATOR* it1 = lwpointiterator_create_rw(g);
        LWPOINTITERATOR* it2 = lwpointiterator_create(g);

        /* Flip the coordinates of the 3rd point */
        while(lwpointiterator_has_next(it1))
        {
                if (i == 2)
                {
                        POINT4D p;
                        double tmp;

                        lwpointiterator_peek(it1, &p);
                        tmp = p.x;
                        p.x = p.y;
                        p.y = tmp;

                        lwpointiterator_modify_next(it1, &p);
                }
                else
                {
                        lwpointiterator_next(it1, NULL);
                }
                i++;
        }
        CU_ASSERT_EQUAL(5, i); /* Every point was visited */
        lwpointiterator_destroy(it1);

        /* Verify that the points are as expected */
        POINT2D points[] =
        {
                { .x = 3, .y = 7 },
                { .x = 2, .y = 8 },
                { .x = 3, .y = 4 },
                { .x = 2, .y = 8 },
                { .x = 17, .y = 3}
        };

        for (i = 0; lwpointiterator_has_next(it2); i++)
        {
                POINT4D p;

                lwpointiterator_next(it2, &p);

                CU_ASSERT_EQUAL(p.x, points[i].x);
                CU_ASSERT_EQUAL(p.y, points[i].y);
        }

        lwpointiterator_destroy(it2);
        lwgeom_free(g);
}

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