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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
commit 0a580b313d
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test/jdk/java/text/Format/DecimalFormat/RoundingTiesNearZeroTest.java Normal file
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/*
* Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8369050
* @summary Check rounding of DecimalFormat on tie cases when the maximum
* fraction digits allowed is one less than the position of the first
* significant digit in the double.
* @run junit RoundingTiesNearZeroTest
*/
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;
import java.math.RoundingMode;
import java.text.NumberFormat;
import java.util.Locale;
import java.util.stream.Stream;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class RoundingTiesNearZeroTest {
// Safe to re-use since we are not testing any fast-path cases
// so state is irrelevant
private static final NumberFormat format = NumberFormat.getInstance(Locale.US);
@ParameterizedTest
@MethodSource("ties")
void roundingTieTest(RoundingMode rm, int maxDigits, double db, String expected) {
format.setRoundingMode(rm);
format.setMaximumFractionDigits(maxDigits);
assertEquals(expected, format.format(db), "Rounding failed under " + rm);
}
static Stream<Arguments> ties() {
return Stream.of(
// 1) String is exact as binary
// 0.5 -> 0.5
Arguments.of(RoundingMode.HALF_EVEN, 0, 0.5, "0"),
Arguments.of(RoundingMode.HALF_UP, 0, 0.5, "1"),
Arguments.of(RoundingMode.HALF_DOWN, 0, 0.5, "0"),
// 2) String is rounded up from binary
// 0.0000005 -> 4.999999999999999773740559129431293428069693618454039096832275390625E-7
Arguments.of(RoundingMode.HALF_EVEN, 6, 0.0000005, "0"),
Arguments.of(RoundingMode.HALF_UP, 6, 0.0000005, "0"),
Arguments.of(RoundingMode.HALF_DOWN, 6, 0.0000005, "0"),
// 3) String is not rounded up from binary
// Non-exponential notation
// 0.05 -> 0.05000000000000000277555756156289135105907917022705078125
Arguments.of(RoundingMode.HALF_EVEN, 1, 0.05, "0.1"),
Arguments.of(RoundingMode.HALF_UP, 1, 0.05, "0.1"),
Arguments.of(RoundingMode.HALF_DOWN, 1, 0.05, "0.1"),
// Exponential notation
// 0.00005 -> 0.0000500000000000000023960868011929647991564706899225711822509765625
Arguments.of(RoundingMode.HALF_EVEN, 4, 0.00005, "0.0001"),
Arguments.of(RoundingMode.HALF_UP, 4, 0.00005, "0.0001"),
Arguments.of(RoundingMode.HALF_DOWN, 4, 0.00005, "0.0001")
);
}
}