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87 lines
2.5 KiB
87 lines
2.5 KiB
/*
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* LocalVariableRangeList (c) 1998 Jochen Hoenicke
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*
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* You may distribute under the terms of the GNU General Public License.
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*
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* IN NO EVENT SHALL JOCHEN HOENICKE BE LIABLE TO ANY PARTY FOR DIRECT,
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* INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
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* THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF JOCHEN HOENICKE
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* HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* JOCHEN HOENICKE SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
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* BASIS, AND JOCHEN HOENICKE HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
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* SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* $Id$
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*/
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package jode;
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import sun.tools.java.*;
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public class LocalVariableRangeList implements LocalVariable {
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class MyLocalInfo extends LocalInfo {
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int start;
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int length;
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MyLocalInfo next;
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MyLocalInfo(int slot, int s, int l, Identifier n, Type t) {
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super (slot);
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start = s;
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length = l;
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setName(n);
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setType(t);
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next = null;
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}
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}
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MyLocalInfo list = null;
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int slot;
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LocalVariableRangeList(int slot) {
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this.slot = slot;
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}
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private void add(MyLocalInfo li) {
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MyLocalInfo before = null;
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MyLocalInfo after = list;
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while (after != null && after.start < li.start) {
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before = after;
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after = after.next;
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}
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if (after != null && li.start + li.length > after.start)
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throw new AssertError("non disjoint locals");
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li.next = after;
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if (before == null)
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list = li;
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else
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before.next = li;
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}
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private LocalInfo find(int addr) {
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MyLocalInfo li = list;
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while (li != null && addr > li.start+li.length)
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li = li.next;
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if (li == null || li.start > addr) {
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LocalInfo temp = new LocalInfo(slot);
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return temp;
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}
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return li;
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}
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public void addLocal(int start, int length,
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Identifier name, Type type) {
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MyLocalInfo li = new MyLocalInfo(slot,start,length,name,type);
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add (li);
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}
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public LocalInfo getInfo(int addr) {
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return find(addr);
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}
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public void combine(int addr1, int addr2) {
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throw new AssertError("combine called on RangeList");
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}
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}
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