| /* |
| * Copyright (c) 2000, 2006, 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. |
| * |
| */ |
| |
| package sun.jvm.hotspot.utilities; |
| |
| import java.io.*; |
| 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"); |
| |
| /** 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) { |
| 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) { |
| bytes[(int) i] = ((Byte) data.get((int) i)).byteValue(); |
| } |
| // FIXME: When we switch to use JDK 6 to build SA, |
| // we can change the following to just return: |
| // return new String(bytes, Charset.defaultCharset()); |
| try { |
| return new String(bytes, encoding); |
| } catch (UnsupportedEncodingException e) { |
| throw new RuntimeException("Error converting bytes to String using " + encoding + " encoding", e); |
| } |
| } |
| } |