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csjavacc/struct/RRepetitionRange.java

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+/*
+ * Copyright © 2002 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * California 95054, U.S.A. All rights reserved.  Sun Microsystems, Inc. has
+ * intellectual property rights relating to technology embodied in the product
+ * that is described in this document. In particular, and without limitation,
+ * these intellectual property rights may include one or more of the U.S.
+ * patents listed at http://www.sun.com/patents and one or more additional
+ * patents or pending patent applications in the U.S. and in other countries.
+ * U.S. Government Rights - Commercial software. Government users are subject
+ * to the Sun Microsystems, Inc. standard license agreement and applicable
+ * provisions of the FAR and its supplements.  Use is subject to license terms.
+ * Sun,  Sun Microsystems,  the Sun logo and  Java are trademarks or registered
+ * trademarks of Sun Microsystems, Inc. in the U.S. and other countries.  This
+ * product is covered and controlled by U.S. Export Control laws and may be
+ * subject to the export or import laws in other countries.  Nuclear, missile,
+ * chemical biological weapons or nuclear maritime end uses or end users,
+ * whether direct or indirect, are strictly prohibited.  Export or reexport
+ * to countries subject to U.S. embargo or to entities identified on U.S.
+ * export exclusion lists, including, but not limited to, the denied persons
+ * and specially designated nationals lists is strictly prohibited.
+ */
+
+package csjavacc.struct;
+
+import java.util.Vector;
+
+
+/**
+ * Describes one-or-more regular expressions (<foo+>).
+ */
+
+public class RRepetitionRange extends RegularExpression {
+
+  /**
+   * The regular expression which is repeated one or more times.
+   */
+  public RegularExpression regexpr;
+  public int min = 0;
+  public int max = -1;
+  public boolean hasMax;
+
+  public Nfa GenerateNfa(boolean ignoreCase)
+  {
+     Vector units = new Vector();
+     RSequence seq;
+     int i;
+
+     for (i = 0; i < min; i++)
+     {
+        units.addElement(regexpr);
+     }
+
+     if (hasMax && max == -1) // Unlimited
+     {
+        RZeroOrMore zoo = new RZeroOrMore();
+        zoo.regexpr = regexpr;
+        units.addElement(zoo);
+     }
+
+     while (i++ < max)
+     {
+        RZeroOrOne zoo = new RZeroOrOne();
+        zoo.regexpr = regexpr;
+        units.addElement(zoo);
+     }
+     seq = new RSequence(units);
+     return seq.GenerateNfa(ignoreCase);
+  }
+}