Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/utilities/CStringUtilities.java @ 554:78144dc3db03
Merge
author | never |
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date | Tue, 13 Jan 2009 14:02:19 -0800 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 2000-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.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); } } }