test_lwprint_roundtrip()

static void test_lwprint_roundtrip ( void  )

static

Definition at line 519 of file cu_print.c.

{
        /* Test roundtrip with the first value outside the range that's always printed as zero */
        assert_lwprint_roundtrip(nextafter(FP_TOLERANCE, 1));
        assert_lwprint_roundtrip(nextafter(-FP_TOLERANCE, -1));
 
        /* Test roundtrip in around the switch to scientific notation */
        assert_lwprint_roundtrip(nextafter(OUT_MAX_DOUBLE, 0));
        assert_lwprint_roundtrip(nextafter(-OUT_MAX_DOUBLE, 0));
        assert_lwprint_roundtrip(OUT_MAX_DOUBLE);
        assert_lwprint_roundtrip(OUT_MAX_DOUBLE);
        assert_lwprint_roundtrip(nextafter(OUT_MAX_DOUBLE, INFINITY));
        assert_lwprint_roundtrip(nextafter(-OUT_MAX_DOUBLE, -INFINITY));
 
        /* Test some numbers */
        assert_lwprint_roundtrip(0);
        assert_lwprint_roundtrip(0.0000000298023223876953125);
        assert_lwprint_roundtrip(0.3);
        assert_lwprint_roundtrip(0.5);
        assert_lwprint_roundtrip(7000109.9999999990686774253845214843750000000000);
        assert_lwprint_roundtrip(6917529027641081856.0);
        assert_lwprint_roundtrip(9e+300);
        assert_lwprint_roundtrip(-9e+300);
        assert_lwprint_roundtrip(9.000000000000001e+300);
        assert_lwprint_roundtrip(-9.000000000000001e+300);
 
        /* Even if we write the **same** number differently as the (compiler) input the roundtrip is guaranteed */
        assert_lwprint_roundtrip(149.57565307617187);
        assert_lwprint_roundtrip(149.57565307617188);
        assert_lwprint_roundtrip(-149.57565307617187);
        assert_lwprint_roundtrip(-149.57565307617188);
 
        /* Extremes */
        assert_lwprint_roundtrip(2.2250738585072014e-308); /* We normalize small numbers to 0 */
        assert_lwprint_roundtrip(1.7976931348623157e+308);
        assert_lwprint_roundtrip(2.9802322387695312E-8);
 
        /* Special cases */
        assert_lwprint_roundtrip(-0); /* -0 is considered equal to 0 */
 
        /* Disabled because Windows / MinGW doesn't like them (#4735)
         *      assert_lwprint_roundtrip(INFINITY);
         *  assert_lwprint_roundtrip(-INFINITY);
         */
 
        /* nan is never equal to nan
         * assert_lwprint_roundtrip(NAN);
         */
}

References assert_lwprint_roundtrip, FP_TOLERANCE, and OUT_MAX_DOUBLE.

Referenced by print_suite_setup().

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