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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
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65
test/jdk/java/io/StringReader/Skip.java Normal file
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/*
* Copyright (c) 2003, 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 4175312
* @summary Test StringReader.skip with negative param
*/
import java.io.*;
public class Skip {
public static void main( String argv[] ) throws Exception {
StringReader in = new StringReader("1234567");
// Skip forward and read
if (in.skip(3) != 3)
throw new RuntimeException("skip(3) failed");
if (in.read() != '4')
throw new RuntimeException("post skip read failure");
// Skip backward and read
if (in.skip(-2) != -2)
throw new RuntimeException("skip(-2) failed");
if (in.read() != '3')
throw new RuntimeException("read failed after negative skip");
// Attempt to skip backward past the beginning and read
if (in.skip(-6) != -3)
throw new RuntimeException("skip(-6) failed");
if (in.read() != '1')
throw new RuntimeException("read after skip past beginning failed");
// Skip beyond the end
if (in.skip(30) != 6)
throw new RuntimeException("skip(30) failed");
if (in.read() != -1)
throw new RuntimeException("read at EOF failed");
// Test after reaching end of string
if (in.skip(30) != 0)
throw new RuntimeException("skip(30) failed");
if (in.skip(-30) != 0)
throw new RuntimeException("skip(30) failed");
}
}