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

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.

test/jdk/java/io/InputStreamReader/One.java

@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2001, 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 4401798
+   @summary Check that single-character reads work properly
+ */
+
+
+import java.io.*;
+
+
+public class One {
+
+    private abstract static class Test {
+
+        InputStreamReader isr;
+        StringBuffer sb;
+        String expect;
+
+        Test(byte[] in, String expect) throws Exception {
+            isr = new InputStreamReader(new ByteArrayInputStream(in), "UTF-8");
+            sb = new StringBuffer(expect.length());
+            this.expect = expect;
+            go();
+        }
+
+        void go() throws Exception {
+            read();
+            if (!expect.equals(sb.toString()))
+                throw new Exception("Expected " + expect
+                                    + ", got " + sb.toString());
+        }
+
+        abstract void read() throws IOException;
+
+    }
+
+
+    private static void test(String expect) throws Exception {
+        byte[] in = expect.getBytes("UTF-8");
+
+        new Test(in, expect) {
+                public void read() throws IOException {
+                    for (;;) {
+                        int c;
+                        if ((c = isr.read()) == -1)
+                            break;
+                        sb.append((char)c);
+                    }
+                }};
+
+        new Test(in, expect) {
+                public void read() throws IOException {
+                    for (;;) {
+                        char[] cb = new char[1];
+                        if (isr.read(cb) == -1)
+                            break;
+                        sb.append(cb[0]);
+                    }
+                }};
+
+        new Test(in, expect) {
+                public void read() throws IOException {
+                    for (;;) {
+                        char[] cb = new char[2];
+                        int n;
+                        if ((n = isr.read(cb)) == -1)
+                            break;
+                        sb.append(cb[0]);
+                        if (n == 2)
+                            sb.append(cb[1]);
+                    }
+                }};
+
+    }
+
+    public static void main(String[] args) throws Exception {
+        test("x");
+        test("xy");
+        test("xyz");
+        test("\ud800\udc00");
+        test("x\ud800\udc00");
+    }
+
+}