gecko-dev/js/js2/java/ControlNodeGroup.java

153 строки
3.5 KiB
Java

import java.util.Vector;
class ControlNodeGroup {
ControlNodeGroup()
{
}
ControlNodeGroup(ControlNode aHead)
{
head = aHead;
}
void add(ControlNodeGroup aGroup)
{
if (head == null) {
head = aGroup.head;
}
else {
fixTails(aGroup.getHead());
}
addTails(aGroup);
}
void add(ControlNode aNode)
{
fixTails(aNode);
addTail(aNode);
if (head == null) head = aNode;
}
void addBreak(ControlNode aNode)
{
fixTails(aNode);
addBreakTail(aNode);
if (head == null) head = aNode;
}
void addContinue(ControlNode aNode)
{
fixTails(aNode);
addContinueTail(aNode);
if (head == null) head = aNode;
}
void fixTails(ControlNode butt)
{
int count = tails.size();
for (int i = 0; i < count; i++)
{
ControlNode aNode = (ControlNode)(tails.elementAt(i));
aNode.setNext(butt);
}
tails.removeAllElements();
}
void fixContinues(ControlNode butt, String label)
{
int count = continueTails.size();
int i = 0;
while (i < count) {
ControlNode c = (ControlNode)(continueTails.elementAt(i));
ExpressionNode e = c.getExpression();
String tgt = (e == null) ? null : ((JSIdentifier)e).s;
if ((tgt == null) || tgt.equals(label)) {
c.setNext(butt);
continueTails.removeElementAt(i);
count--;
}
else
i++;
}
}
void setHead(ControlNode aHead)
{
head = aHead;
}
ControlNode getHead()
{
return head;
}
void addTail(ControlNode aTail)
{
tails.addElement(aTail);
}
void addBreakTail(ControlNode aTail)
{
breakTails.addElement(aTail);
}
void addContinueTail(ControlNode aTail)
{
continueTails.addElement(aTail);
}
void removeTail(ControlNode aTail)
{
tails.removeElement(aTail);
}
void addTails(ControlNodeGroup aGroup)
{
int count = aGroup.tails.size();
for (int i = 0; i < count; i++)
{
tails.addElement(aGroup.tails.elementAt(i));
}
aGroup.tails.removeAllElements();
count = aGroup.breakTails.size();
for (int i = 0; i < count; i++)
{
breakTails.addElement(aGroup.breakTails.elementAt(i));
}
aGroup.breakTails.removeAllElements();
count = aGroup.continueTails.size();
for (int i = 0; i < count; i++)
{
continueTails.addElement(aGroup.continueTails.elementAt(i));
}
aGroup.continueTails.removeAllElements();
}
void shiftBreakTails(String label)
{
int count = breakTails.size();
int i = 0;
while (i < count) {
ControlNode c = (ControlNode)(breakTails.elementAt(i));
ExpressionNode e = c.getExpression();
String tgt = (e == null) ? null : ((JSIdentifier)e).s;
if ((tgt == null) || tgt.equals(label)) {
tails.addElement(c);
breakTails.removeElementAt(i);
count--;
}
else
i++;
}
}
ControlNode head;
Vector tails = new Vector();
Vector breakTails = new Vector();
Vector continueTails = new Vector();
}