/*
* Copyright ( c ) 1997 , 2010 , 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 4017728 4079849 6788196
* @ summary Check for correct Array Bounds check in read of FileInputStream and
* RandomAccessFile
*/
import java.io.*;
/*
* The test calls the read ( byte buf [ ] , int off , int len ) of
* FileInputStream with different values of off and len to see if the
* IndexOutOfBoundsException is thrown . The read ( . . . ) method calls
* readBytes ( . . . ) in native code ( io_util . c ) . The read ( . . . ) method in
* RandomAccessFile also calls the same native method . So one should
* see similar results .
*/
public class ReadBytesBounds {
static final FileInputStream fis;
static final RandomAccessFile raf;
static final byte [] b = new byte [32 ];
static {
try {
String dir = System.getProperty("test.src" , "." );
File testFile = new File(dir, "input.txt" );
fis = new FileInputStream(testFile);
raf = new RandomAccessFile(testFile , "r" );
} catch (Throwable t) {
throw new Error(t);
}
}
public static void main(String argv[]) throws Throwable {
try {
testRead(-1 , -1 , false );
testRead(-1 , 0 , false );
testRead( 0 , -1 , false );
testRead( 0 , 33 , false );
testRead(33 , 0 , false );
testRead(33 , 4 , false );
testRead( 0 , 32 , true );
testRead(32 , 0 , true );
testRead(32 , 4 , false );
testRead( 4 , 16 , true );
testRead( 1 , 31 , true );
testRead( 0 , 0 , true );
testRead(31 , Integer.MAX_VALUE, false );
testRead( 0 , Integer.MAX_VALUE, false );
testRead(-1 , Integer.MAX_VALUE, false );
testRead(-4 , Integer.MIN_VALUE, false );
testRead( 0 , Integer.MIN_VALUE, false );
} finally {
fis.close();
raf.close();
}
}
static void testRead(int off, int len, boolean expected) throws Throwable {
System.err.printf("off=%d len=%d expected=%b%n" , off, len, expected);
boolean result;
try {
fis.read(b, off, len);
raf.read(b, off, len);
result = true ;
} catch (IndexOutOfBoundsException e) {
result = false ;
}
if (result != expected) {
throw new RuntimeException
(String.format("Unexpected result off=%d len=%d expected=%b" ,
off, len, expected));
}
}
}
Messung V0.5 in Prozent C=93 H=97 G=94
¤ Dauer der Verarbeitung: 0.8 Sekunden
(vorverarbeitet am 2026-10-11)
¤
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