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79 lines
2.4 KiB
79 lines
2.4 KiB
/* LocalVariableRangeList Copyright (C) 1998-2002 Jochen Hoenicke.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; see the file COPYING.LESSER. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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*/
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package jode.decompiler;
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import jode.GlobalOptions;
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import jode.type.Type;
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public class LocalVariableRangeList {
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LocalVarEntry list = null;
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LocalVariableRangeList() {
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}
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private void add(LocalVarEntry li) {
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LocalVarEntry prev = null;
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LocalVarEntry next = list;
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while (next != null && next.endAddr < li.startAddr) {
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prev = next;
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next = next.next;
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}
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/* prev.endAddr < li.startAddr <= next.endAddr
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*/
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if (next != null && li.endAddr >= next.startAddr) {
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if (next.type.equals(li.type)
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&& next.name.equals(li.name)) {
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/* Same type, same name and overlapping range.
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* This is the same local: extend next to the common
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* range and don't add li.
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*/
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next.startAddr = Math.min(next.startAddr, li.startAddr);
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next.endAddr = Math.max(next.endAddr, li.endAddr);
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return;
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}
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GlobalOptions.err.println("warning: non disjoint locals");
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}
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li.next = next;
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if (prev == null)
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list = li;
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else
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prev.next = li;
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}
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private LocalVarEntry find(int addr) {
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LocalVarEntry li = list;
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while (li != null && li.endAddr < addr)
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li = li.next;
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if (li == null || li.startAddr > addr) {
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return null;
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}
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return li;
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}
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public void addLocal(int startAddr, int endAddr,
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String name, Type type) {
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LocalVarEntry li = new LocalVarEntry(startAddr,endAddr,name,type);
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add (li);
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}
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public LocalVarEntry getInfo(int addr) {
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return find(addr);
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}
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}
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