/*
* Copyright (c) 1998, 2003, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
package com.sun.tools.example.debug.bdi; //### does it belong here?
import com.sun.jdi.*;
public class Utils {
/**
* Return the thread status description.
*/
public static String getStatus(ThreadReference thr) {
int status = thr.status();
String result;
switch (status) {
case ThreadReference.THREAD_STATUS_UNKNOWN:
result = "unknown status";
break;
case ThreadReference.THREAD_STATUS_ZOMBIE:
result = "zombie";
break;
case ThreadReference.THREAD_STATUS_RUNNING:
result = "running";
break;
case ThreadReference.THREAD_STATUS_SLEEPING:
result = "sleeping";
break;
case ThreadReference.THREAD_STATUS_MONITOR:
result = "waiting to acquire a monitor lock";
break;
case ThreadReference.THREAD_STATUS_WAIT:
result = "waiting on a condition";
break;
default:
result = "<invalid thread status>";
}
if (thr.isSuspended()) {
result += " (suspended)";
}
return result;
}
/**
* Return a description of an object.
*/
public static String description(ObjectReference ref) {
ReferenceType clazz = ref.referenceType();
long id = ref.uniqueID(); //### TODO use real id
if (clazz == null) {
return toHex(id);
} else {
return "(" + clazz.name() + ")" + toHex(id);
}
}
/**
* Convert a long to a hexadecimal string.
*/
public static String toHex(long n) {
char s1[] = new char[16];
char s2[] = new char[18];
// Store digits in reverse order.
int i = 0;
do {
long d = n & 0xf;
s1[i++] = (char)((d < 10) ? ('0' + d) : ('a' + d - 10));
} while ((n >>>= 4) > 0);
// Now reverse the array.
s2[0] = '0';
s2[1] = 'x';
int j = 2;
while (--i >= 0) {
s2[j++] = s1[i];
}
return new String(s2, 0, j);
}
/**
* Convert hexadecimal strings to longs.
*/
public static long fromHex(String hexStr) {
String str = hexStr.startsWith("0x") ?
hexStr.substring(2).toLowerCase() : hexStr.toLowerCase();
if (hexStr.length() == 0) {
throw new NumberFormatException();
}
long ret = 0;
for (int i = 0; i < str.length(); i++) {
int c = str.charAt(i);
if (c >= '0' && c <= '9') {
ret = (ret * 16) + (c - '0');
} else if (c >= 'a' && c <= 'f') {
ret = (ret * 16) + (c - 'a' + 10);
} else {
throw new NumberFormatException();
}
}
return ret;
}
/*
* The next two methods are used by this class and by EventHandler
* to print consistent locations and error messages.
*/
public static String locationString(Location loc) {
return loc.declaringType().name() +
"." + loc.method().name() + "(), line=" +
loc.lineNumber();
}
//### UNUSED.
/************************
private String typedName(Method method) {
// TO DO: Use method.signature() instead of method.arguments() so that
// we get sensible results for classes without debugging info
StringBuffer buf = new StringBuffer();
buf.append(method.name());
buf.append("(");
Iterator it = method.arguments().iterator();
while (it.hasNext()) {
buf.append(((LocalVariable)it.next()).typeName());
if (it.hasNext()) {
buf.append(",");
}
}
buf.append(")");
return buf.toString();
}
************************/
public static boolean isValidMethodName(String s) {
return isJavaIdentifier(s) ||
s.equals("<init>") ||
s.equals("<clinit>");
}
public static boolean isJavaIdentifier(String s) {
if (s.length() == 0) {
return false;
}
int cp = s.codePointAt(0);
if (! Character.isJavaIdentifierStart(cp)) {
return false;
}
for (int i = Character.charCount(cp); i < s.length(); i += Character.charCount(cp)) {
cp = s.codePointAt(i);
if (! Character.isJavaIdentifierPart(cp)) {
return false;
}
}
return true;
}
}