created mirror

Java/ZZCursorVirtual.java

@@ -0,0 +1,61 @@
+/*   
+ZZCursorVirtual.java
+ *    
+ *    Copyright (c) 2000, Ted Nelson and Tuomas Lukka
+ *
+ *    You may use and distribute under the terms of either the GNU Lesser
+ *    General Public License, either version 2 of the license or,
+ *    at your choice, any later version. Alternatively, you may use and
+ *    distribute under the terms of the XPL.
+ *
+ *    See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of 
+ *    the licenses.
+ *
+ *    This software is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the README
+ *    file for more details.
+ *
+ */
+/*
+ * Written by Tuomas Lukka
+ */
+package org.gzigzag;
+import java.util.*;
+
+/** A virtual cursor.
+ * Used by clang to optimize away some puts and gets, e.g. to postpone
+ * setting the view cursor in the structure until the end of the routine.
+ * XXX Clang definition needs to be VERY specific about what timings
+ * are guaranteed in storing things to the structure.
+ */
+public class ZZCursorVirtual extends ZZCursor {
+String rcsid = "$Id: ZZCursorVirtual.java,v 1.7 2000/11/25 00:36:33 tjl Exp $";
+    ZZCell val;
+    int offs;
+
+    public ZZCursorVirtual(ZZCell startVal) {
+	val = startVal;
+	offs = NO_OFFSET;
+    }
+    public ZZCursorVirtual(ZZCell startVal, int startOffset) {
+	val = startVal;
+	offs = startOffset;
+    }
+    public ZZCursorVirtual(ZZCursor curs) {
+	val = curs.get();
+	offs = curs.getOffs();
+    }
+
+    static public ZZCursorVirtual createFromReal(ZZCell curs) {
+	return new ZZCursorVirtual(ZZCursorReal.get(curs),
+				    ZZCursorReal.getOffs(curs));
+    }
+
+    public ZZCell get() { return val; }
+    public void set(ZZCell c) { val = c; }
+    public int getOffs() { return offs; }
+    public void setOffs(int i) { offs = i; }
+}
+
+