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+/**************************************************************************
+ *
+ * Copyright 2010 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#ifndef _TRACE_MODEL_HPP_
+#define _TRACE_MODEL_HPP_
+
+
+#include <cassert>
+
+#include <string>
+#include <map>
+#include <list>
+#include <vector>
+#include <iostream>
+
+
+namespace Trace {
+
+
+class Visitor;
+class Dumper;
+class UInt;
+
+
+class Value
+{
+public:
+   virtual void visit(Visitor &visitor) = 0;
+};
+
+
+class Void : public Value
+{
+public:
+   void visit(Visitor &visitor);
+};
+
+
+class Bool : public Value
+{
+public:
+   Bool(bool _value) : value(_value) {}
+
+   void visit(Visitor &visitor);
+
+   bool value;
+};
+
+
+class SInt : public Value
+{
+public:
+   SInt(signed long long _value) : value(_value) {}
+
+   void visit(Visitor &visitor);
+
+   signed long long value;
+};
+
+
+class UInt : public Value
+{
+public:
+   UInt(unsigned long long _value) : value(_value) {}
+
+   void visit(Visitor &visitor);
+
+   unsigned long long value;
+};
+
+
+class Float : public Value
+{
+public:
+   Float(double _value) : value(_value) {}
+
+   void visit(Visitor &visitor);
+
+   double value;
+};
+
+
+class String : public Value
+{
+public:
+   String(std::string _value) : value(_value) {}
+
+   void visit(Visitor &visitor);
+
+   std::string value;
+};
+
+
+class Const : public Value
+{
+public:
+   Const(std::string _name, Value *_value) : name(_name), value(_value) {}
+
+   void visit(Visitor &visitor);
+
+   std::string name;
+   Value *value;
+};
+
+
+class Array : public Value
+{
+public:
+   Array(size_t len) : values(len) {}
+
+   void visit(Visitor &visitor);
+
+   std::vector<Value *> values;
+};
+
+
+class Visitor
+{
+public:
+   virtual void visit(Void *) {assert(0);}
+   virtual void visit(Bool *) {assert(0);}
+   virtual void visit(SInt *) {assert(0);}
+   virtual void visit(UInt *) {assert(0);}
+   virtual void visit(Float *) {assert(0);}
+   virtual void visit(String *) {assert(0);}
+   virtual void visit(Const *) {assert(0);}
+   virtual void visit(Array *) {assert(0);}
+};
+
+
+std::ostream & operator <<(std::ostream &os, Value *value);
+
+
+signed long long asSInt(const Value *node);
+unsigned long long asUInt(const Value *node);
+double asFloat(const Value *node);
+
+
+typedef std::pair<std::string, Value *> Arg;
+
+class Call
+{
+public:
+   std::string name;
+   std::list<Arg> args;
+   Value *ret;
+
+   Call() : ret(0) { }
+
+   Value * get_arg(const char *name) {
+      for (std::list<Arg>::iterator it = args.begin(); it != args.end(); ++it) {
+         if (it->first == name) {
+            return it->second;
+         }
+      }
+      return NULL;
+   }
+};
+
+
+
+std::ostream & operator <<(std::ostream &os, Call &call);
+
+
+} /* namespace Trace */
+
+#endif /* _TRACE_MODEL_HPP_ */