paramTable.h

/*  _________________________________________________________________________
 *
 *  UTILIB: A utility library for developing portable C++ codes.
 *  Copyright (c) 2001, Sandia National Laboratories.
 *  This software is distributed under the GNU Lesser General Public License.
 *  For more information, see the README file in the top UTILIB directory.
 *  _________________________________________________________________________
 */

//
// paramTable.H
//
#ifndef __paramTable_H
#define __paramTable_H

#ifdef __GNUC__
#pragma interface
#endif


class parameter
{
public:

  double operator()() { return value; };
  static void readAll(int argc,char** argv,int minArgs = 0,int maxArgs = 1);
  void changeValue(double newValue);
  int hasBeenChanged() { return changeCounter > 0; };
  static int howMany() { return numParameters; };

  parameter(const char* name_,double minValue_,double value_,double maxValue_);
  ~parameter();

  enum { tableSize=101 };     // Define local constant.

private:

  double     value;
  double     maxValue;
  double     minValue;
  const char*      name;
  int        changeCounter;

  parameter* next;
  parameter* prev;

  static int numParameters;
  static parameter* hashHeader[tableSize];

  static unsigned int hash(const char* name_);
  static parameter* lookup(const char* name_,int hashValue_);
  static parameter* lookup(const char* name_) { return lookup(name_,hash(name_)); };
  static void parseLine(int argc,char** arv,int minArgs = 0,int maxArgs = 1);
  static void readFromFile(const char* fileName);
  static double convert(const char* buffer, const char* errorKey);
  
};


#define CLASS_PARAMETER(name) \
   static parameter name

#define GLOBAL_PARAMETER(name) \
   extern parameter name

#define CLASS_PARAMETER_DEF(class,name,min,default,max) \
   parameter class::name(#name,min,default,max)

#define GLOBAL_PARAMETER_DEF(name,min,default,max) \
   parameter name(#name,min,default,max)


#endif