Forcefield.h
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	/******************************
	*
	* This is the header file for the routine that reads the forcefield file
	* into memory in order to speed up searching.
	*
	* It defines the data structures used to store the force field in memory
	*/

	#include <stdio.h>
	#include <string.h>
	#include <stddef.h>
	#include <stdlib.h>


	#ifdef FF_MAIN
	#define _EX
	#else
	#define _EX extern
	#endif

	#define MAX_NO_MEMS 5
	#define MAX_NO_PARAMS 8
	#define MAX_LINE 200

	struct FrcFieldData
	{
	float ver; /* Version number of forcefield entry */
	int ref; /* Reference within forcefield */
	char ff_types[MAX_NO_MEMS][5];
	double ff_param[MAX_NO_PARAMS];
	};

	struct FrcFieldItem
	{
	char keyword[25];
	int number_of_members; /* number of members of item */
	int number_of_parameters; /* number of parameters of item */
	int entries; /* number of entries in item list */
	struct FrcFieldData data; / contains all eqiuv and param data */
	};

	_EX struct FrcFieldItem ff_atomtypes, equivalence, \
	ff_vdw,ff_bond, ff_ang, ff_tor, ff_oop, \
	ff_bonbon, ff_bonang, ff_angtor, ff_angangtor, \
	ff_endbontor, ff_midbontor, ff_angang, ff_bonbon13;

	#undef _EX