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diff --git a/util/statetrace/printer.hh b/util/statetrace/printer.hh
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+/*
+ * Copyright (c) 2006 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef PRINTER_HH
+#define PRINTER_HH
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+#include "refcnt.hh"
+
+class TraceChild;
+class PrinterObject;
+
+typedef RefCountingPtr<PrinterObject> PrinterPointer;
+
+class PrinterObject : public RefCounted
+{
+  protected:
+    TraceChild * child;
+  public:
+    PrinterObject(TraceChild * newChild) : child(newChild)
+    {;}
+    virtual std::ostream & writeOut(std::ostream & os) = 0;
+    virtual bool configure(std::string) = 0;
+};
+
+class NestingPrinter : public PrinterObject
+{
+  private:
+    std::vector<std::string> constStrings;
+    std::vector<PrinterPointer> printers;
+    int switchVar;
+    int numPrinters;
+  public:
+    NestingPrinter(TraceChild * newChild) :
+        PrinterObject(newChild), numPrinters(0), switchVar(-1)
+    {;}
+
+    bool configure(std::string);
+
+    std::ostream & writeOut(std::ostream & os);
+};
+
+class RegPrinter : public PrinterObject
+{
+  private:
+    int intRegNum;
+  public:
+    RegPrinter(TraceChild * newChild, int num = 0) :
+        PrinterObject(newChild), intRegNum(num)
+    {;}
+
+    void regNum(int num)
+    {
+        intRegNum = num;
+    }
+
+    int regNum()
+    {
+        return intRegNum;
+    }
+
+    bool configure(std::string);
+
+    std::ostream & writeOut(std::ostream & os);
+};
+
+static inline std::ostream & operator << (std::ostream & os,
+        PrinterObject & printer)
+{
+    return printer.writeOut(os);
+}
+
+static inline std::ostream & operator << (std::ostream & os,
+        PrinterPointer & printer)
+{
+    return printer->writeOut(os);
+}
+
+#endif