111 lines
3.5 KiB
Java
111 lines
3.5 KiB
Java
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
/*
|
|
* Store and compare call chains (for stepping)
|
|
*/
|
|
|
|
// when who what
|
|
// 06/27/97 jband added this header to my code
|
|
//
|
|
|
|
package com.netscape.jsdebugging.ifcui;
|
|
|
|
import com.netscape.jsdebugging.api.*;
|
|
|
|
// I may regret this later, but I'm just going to store an array of Scripts.
|
|
|
|
class CallChain
|
|
{
|
|
// compare return codes
|
|
|
|
public static final int EQUAL = 0;
|
|
public static final int CALLER = 1;
|
|
public static final int CALLEE = 2;
|
|
public static final int DISJOINT = 3;
|
|
|
|
public CallChain( JSThreadState threadState )
|
|
{
|
|
try
|
|
{
|
|
StackFrameInfo[] infoarray = threadState.getStack();
|
|
if( null == infoarray || 0 == infoarray.length )
|
|
return;
|
|
|
|
int count = infoarray.length;
|
|
_chain = new Script[count];
|
|
|
|
for( int i = 0; i < count; i++ )
|
|
_chain[i] = ((JSPC)(infoarray[i].getPC())).getScript();
|
|
}
|
|
catch( InvalidInfoException e )
|
|
{
|
|
_chain = null;
|
|
return;
|
|
}
|
|
}
|
|
|
|
public int compare( CallChain other )
|
|
{
|
|
if( this == other )
|
|
return EQUAL;
|
|
if( null == _chain || null == other || null == other._chain )
|
|
return DISJOINT;
|
|
|
|
int count = _chain.length;
|
|
int other_count = other._chain.length;
|
|
if( 0 == count || 0 == other_count )
|
|
return DISJOINT;
|
|
|
|
int lesser_count = Math.min( count, other_count );
|
|
int i;
|
|
for( i = 0; i < lesser_count; i++ )
|
|
{
|
|
if( ! _chain[i].equals(other._chain[i]) )
|
|
return DISJOINT;
|
|
}
|
|
if( count > other_count )
|
|
return CALLER;
|
|
if( count < other_count )
|
|
return CALLEE;
|
|
return EQUAL;
|
|
}
|
|
|
|
private Script[] _chain;
|
|
}
|