// =============================================================
// ANSR.h																	 �1999-2002, J.T. Frey
// =============================================================
// Written:		J.T. Frey, 23.FEB.2002
// Purpose:		Atomic Number/Symbol Resolution class.
//
// Last Mod:	05.Feb.2003:	Removed all ostream::form calls and moved to purely
//													C++ stream operators.

#ifndef __ANSRDB__
#define __ANSRDB__

#include <iostream>
#ifndef SGI
  #include <stdint.h>
#else
  #include <inttypes.h>
#endif

using namespace std;

//

	/////////////////////////////////////////////////////////
	// TElementSymbol - four-character entity, masquerading
	// as a simple 32-bit integer!  For any symbol/number
	// that we can't resolve, there's a constant, too:
	//
	typedef			uint32_t							TElementSymbol;
	
	#define     kANSRInvalidSymbol		(TElementSymbol)-1
	
//

	/////////////////////////////////////////////////////////
	// TElementInfo - data structure which contains an
	// element's information.
	//
	typedef struct TElementInfo {
		unsigned							atomicNumber;
	  TElementSymbol				chemSymbol;
		double								weight;
	} TElementInfo;
	
//

	/////////////////////////////////////////////////////////
	// ANSRDB - Atomic Number/Symbol Resolution Data Base
	//
	class ANSRDB {
	  public:
			ANSRDB();
			ANSRDB(const char* filepath);
			~ANSRDB();
      
      static ANSRDB* DefaultANSRDB();
			
			static TElementSymbol MakeSymbolFromString(const char* string);
			
			TElementSymbol LookupSymbolForNumber(unsigned number);
			unsigned LookupNumberForSymbol(TElementSymbol symbol);
			TElementInfo* LookupElementInfoForNumber(unsigned number);
			TElementInfo* LookupElementInfoForSymbol(TElementSymbol symbol);
			
			void print(ostream& os);
			
		protected:
		  unsigned							elementsInTable;
		  TElementInfo*					elements;
		  unsigned*							lookupTable;
			
		private:
			int DidInitializeTables();
			int DidReadTableFromFile(const char* filepath);
	};

#endif