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diff --git a/src/intersim2/config_utils.hpp b/src/intersim2/config_utils.hpp
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+// $Id: config_utils.hpp 5188 2012-08-30 00:31:31Z dub $
+
+/*
+ Copyright (c) 2007-2012, Trustees of The Leland Stanford Junior University
+ 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.
+
+ 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.
+*/
+
+#ifndef _CONFIG_UTILS_HPP_
+#define _CONFIG_UTILS_HPP_
+
+#include "booksim.hpp"
+
+#include<cstdio>
+#include<string>
+#include<map>
+#include<vector>
+
+extern "C" int yyparse();
+
+class Configuration {
+  static Configuration * theConfig;
+  FILE * _config_file;
+  string _config_string;
+
+protected:
+  map<string,string> _str_map;
+  map<string,int>    _int_map;
+  map<string,double> _float_map;
+  
+public:
+  Configuration();
+
+  void AddStrField(string const & field, string const & value);
+
+  void Assign(string const & field, string const & value);
+  void Assign(string const & field, int value);
+  void Assign(string const & field, double value);
+
+  string GetStr(string const & field) const;
+  int GetInt(string const & field) const;
+  double GetFloat(string const & field) const;
+
+  vector<string> GetStrArray(const string & field) const;
+  vector<int> GetIntArray(const string & field) const;
+  vector<double> GetFloatArray(const string & field) const;
+
+  void ParseFile(string const & filename);
+  void ParseString(string const & str);
+  int  Input(char * line, int max_size);
+  void ParseError(string const & msg, unsigned int lineno = 0) const;
+  
+  void WriteFile(string const & filename);
+  void WriteMatlabFile(ostream * o) const;
+
+  inline const map<string, string> & GetStrMap() const {
+    return _str_map;
+  }
+  inline const map<string, int> & GetIntMap() const {
+    return _int_map;
+  }
+  inline const map<string, double> & GetFloatMap() const {
+    return _float_map;
+  }
+
+  static Configuration * GetTheConfig();
+
+};
+
+bool ParseArgs(Configuration * cf, int argc, char **argv);
+
+vector<string> tokenize_str(string const & data);
+vector<int> tokenize_int(string const & data);
+vector<double> tokenize_float(string const & data);
+
+#endif