first commit

hrmsEjb/org/nfunk/jep/JJTParserState.java

@@ -0,0 +1,91 @@
+package org.nfunk.jep;
+
+import java.util.Stack;
+
+class JJTParserState {
+  private Stack nodes = new Stack();
+  
+  private Stack marks = new Stack();
+  
+  private int sp = 0;
+  
+  private int mk = 0;
+  
+  private boolean node_created;
+  
+  boolean nodeCreated() {
+    return this.node_created;
+  }
+  
+  void reset() {
+    this.nodes.removeAllElements();
+    this.marks.removeAllElements();
+    this.sp = 0;
+    this.mk = 0;
+  }
+  
+  Node rootNode() {
+    return this.nodes.elementAt(0);
+  }
+  
+  void pushNode(Node paramNode) {
+    this.nodes.push(paramNode);
+    this.sp++;
+  }
+  
+  Node popNode() {
+    if (--this.sp < this.mk)
+      this.mk = ((Integer)this.marks.pop()).intValue(); 
+    return this.nodes.pop();
+  }
+  
+  Node peekNode() {
+    return this.nodes.peek();
+  }
+  
+  int nodeArity() {
+    return this.sp - this.mk;
+  }
+  
+  void clearNodeScope(Node paramNode) {
+    while (this.sp > this.mk)
+      popNode(); 
+    this.mk = ((Integer)this.marks.pop()).intValue();
+  }
+  
+  void openNodeScope(Node paramNode) {
+    this.marks.push(new Integer(this.mk));
+    this.mk = this.sp;
+    paramNode.jjtOpen();
+  }
+  
+  void closeNodeScope(Node paramNode, int paramInt) {
+    this.mk = ((Integer)this.marks.pop()).intValue();
+    while (paramInt-- > 0) {
+      Node node = popNode();
+      node.jjtSetParent(paramNode);
+      paramNode.jjtAddChild(node, paramInt);
+    } 
+    paramNode.jjtClose();
+    pushNode(paramNode);
+    this.node_created = true;
+  }
+  
+  void closeNodeScope(Node paramNode, boolean paramBoolean) {
+    if (paramBoolean) {
+      int i = nodeArity();
+      this.mk = ((Integer)this.marks.pop()).intValue();
+      while (i-- > 0) {
+        Node node = popNode();
+        node.jjtSetParent(paramNode);
+        paramNode.jjtAddChild(node, i);
+      } 
+      paramNode.jjtClose();
+      pushNode(paramNode);
+      this.node_created = true;
+    } else {
+      this.mk = ((Integer)this.marks.pop()).intValue();
+      this.node_created = false;
+    } 
+  }
+}