/*
* Copyright (c) 2000, 2018, 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
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*/
package sun.jvm.hotspot.utilities;
import java.io.*;
import java.nio.charset.Charset;
import java.util.*;
import sun.jvm.hotspot.debugger.*;
/** A utility class encapsulating useful operations on C strings
represented as Addresses */
public class CStringUtilities {
/** Return the length of a null-terminated ASCII string in the
remote process */
public static int getStringLength(Address addr) {
int i = 0;
while (addr.getCIntegerAt(i, 1, false) != 0) {
i++;
}
return i;
}
private static String encoding = System.getProperty("file.encoding", "US-ASCII");
public static String getString(Address addr) {
return getString(addr, Charset.forName(encoding));
}
/** Fetch a null-terminated ASCII string from the remote process.
Returns null if the argument is null, otherwise returns a
non-null string (for example, returns an empty string if the
first character fetched is the null terminator). */
public static String getString(Address addr, Charset charset) {
if (addr == null) {
return null;
}
List data = new ArrayList();
byte val = 0;
long i = 0;
do {
val = (byte) addr.getCIntegerAt(i, 1, false);
if (val != 0) {
data.add(new Byte(val));
}
++i;
} while (val != 0);
// Convert to byte[] and from there to String
byte[] bytes = new byte[data.size()];
for (i = 0; i < data.size(); ++i) {
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