OOPSE/libmdtools/LJFF.cpp

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

#include <iostream>
using namespace std;

#ifdef IS_MPI
#include <mpi.h>
#endif //is_mpi

#include "ForceFields.hpp"
#include "SRI.hpp"
#include "simError.h"

#include "fortranWrappers.hpp"

#ifdef IS_MPI
#include "mpiForceField.h"
#endif // is_mpi


namespace LJ_NS{

  // Declare the structures that will be passed by the parser and  MPI
  
  typedef struct{
    char name[15];
    double mass;
    double epslon;
    double sigma;
    int ident;
    int last;      //  0  -> default
                   //  1  -> in MPI: tells nodes to stop listening
  } atomStruct;

  int parseAtom( char *lineBuffer, int lineNum, atomStruct &info );
  
#ifdef IS_MPI
  
  MPI_Datatype mpiAtomStructType;
  
#endif

  class LinkedAtomType {
  public:
    LinkedAtomType(){ 
      next = NULL;
      name[0] = '\0';
    }
    ~LinkedAtomType(){ if( next != NULL ) delete next; }

    LinkedAtomType* find(char* key){ 
      if( !strcmp(name, key) ) return this;
      if( next != NULL ) return next->find(key);
      return NULL;
    }
    

    void add( atomStruct &info ){
    
      // check for duplicates
      
      if( !strcmp( info.name, name ) ){
        sprintf( painCave.errMsg,
                 "Duplicate LJ atom type \"%s\" found in "
                 "the LJFF param file./n",
                 name );
        painCave.isFatal = 1;
        simError();
      }
      
      if( next != NULL ) next->add(info);
      else{
        next = new LinkedAtomType();
        strcpy(next->name, info.name);
        next->mass     = info.mass;
        next->epslon   = info.epslon;
        next->sigma    = info.sigma;
        next->ident    = info.ident;
      }
    }
    

#ifdef IS_MPI
    
    void duplicate( atomStruct &info ){
      strcpy(info.name, name);
      info.mass     = mass;
      info.epslon   = epslon;
      info.sigma    = sigma;
      info.ident    = ident;
      info.last     = 0;
    }


#endif

    char name[15];
    double mass;
    double epslon;
    double sigma;
    int ident;
    LinkedAtomType* next;
  };

  LinkedAtomType* headAtomType; 
  LinkedAtomType* currentAtomType;

}

using namespace LJ_NS;

//****************************************************************
// begins the actual forcefield stuff.  
//****************************************************************


LJFF::LJFF(){

  char fileName[200];
  char* ffPath_env = "FORCE_PARAM_PATH";
  char* ffPath;
  char temp[200];

  headAtomType = NULL;
  currentAtomType = NULL;

  // do the funtion wrapping
  wrapMeFF( this );

#ifdef IS_MPI
  int i;
  
   // **********************************************************************
  // Init the atomStruct mpi type

  atomStruct atomProto; // mpiPrototype
  int atomBC[3] = {15,3,2};  // block counts
  MPI_Aint atomDspls[3];           // displacements
  MPI_Datatype atomMbrTypes[3];    // member mpi types

  MPI_Address(&atomProto.name, &atomDspls[0]);
  MPI_Address(&atomProto.mass, &atomDspls[1]);
  MPI_Address(&atomProto.ident, &atomDspls[2]);
  
  atomMbrTypes[0] = MPI_CHAR;
  atomMbrTypes[1] = MPI_DOUBLE;
  atomMbrTypes[2] = MPI_INT;
  
  for (i=2; i >= 0; i--) atomDspls[i] -= atomDspls[0];
  
  MPI_Type_struct(3, atomBC, atomDspls, atomMbrTypes, &mpiAtomStructType);
  MPI_Type_commit(&mpiAtomStructType);

  // ***********************************************************************
  
  if( worldRank == 0 ){
#endif
    
    // generate the force file name
    
    strcpy( fileName, "LJFF.frc" ); 
    fprintf( stderr,"Trying to open %s\n", fileName );
    
    // attempt to open the file in the current directory first.
    
    frcFile = fopen( fileName, "r" );
    
    if( frcFile == NULL ){
      
      // next see if the force path enviorment variable is set
      
      ffPath = getenv( ffPath_env );
      if( ffPath == NULL ) {
        STR_DEFINE(ffPath, FRC_PATH );
      }
      
      
      strcpy( temp, ffPath );
      strcat( temp, "/" );
      strcat( temp, fileName );
      strcpy( fileName, temp );
      
      frcFile = fopen( fileName, "r" );
      
      if( frcFile == NULL ){
        
        sprintf( painCave.errMsg,
                 "Error opening the force field parameter file: %s\n"
                 "Have you tried setting the FORCE_PARAM_PATH environment "
                 "vairable?\n",
                 fileName );
        painCave.isFatal = 1;
        simError();
      }
    }
    
#ifdef IS_MPI
  }
  
  sprintf( checkPointMsg, "LJFF file opened sucessfully." );
  MPIcheckPoint();
  
#endif // is_mpi
}


LJFF::~LJFF(){

  if( headAtomType != NULL ) delete headAtomType;

#ifdef IS_MPI
  if( worldRank == 0 ){
#endif // is_mpi
    
    fclose( frcFile );
    
#ifdef IS_MPI
  }
#endif // is_mpi
}

void LJFF::initForceField( int ljMixRule ){
  
  initFortran( ljMixRule, 0 );
}

void LJFF::cleanMe( void ){

#ifdef IS_MPI
  
  // keep the linked list in the mpi version

#else // is_mpi

  // delete the linked list in the single processor version

  if( headAtomType != NULL ) delete headAtomType;

#endif // is_mpi
}

void LJFF::readParams( void ){

  atomStruct info;
  info.last = 1; // initialize last to have the last set. 
                 // if things go well, last will be set to 0

  int identNum;
  

  bigSigma = 0.0;
#ifdef IS_MPI
  if( worldRank == 0 ){
#endif
    
    // read in the atom types.

    headAtomType = new LinkedAtomType;
    
    fastForward( "AtomTypes", "initializeAtoms" );

    // we are now at the AtomTypes section.
    
    eof_test = fgets( readLine, sizeof(readLine), frcFile );
    lineNum++;
    
    
    // read a line, and start parseing out the atom types 

    if( eof_test == NULL ){
      sprintf( painCave.errMsg, 
               "Error in reading Atoms from force file at line %d.\n",
               lineNum );
      painCave.isFatal = 1;
      simError();
    }
    
    identNum = 1;
    // stop reading at end of file, or at next section
    while( readLine[0] != '#' && eof_test != NULL ){

      // toss comment lines
      if( readLine[0] != '!' ){
        
        // the parser returns 0 if the line was blank
        if( parseAtom( readLine, lineNum, info ) ){
          info.ident = identNum;
          headAtomType->add( info );;
          identNum++;
        }
      }
      eof_test = fgets( readLine, sizeof(readLine), frcFile );
      lineNum++;
    }

#ifdef IS_MPI
    
    // send out the linked list to all the other processes

    sprintf( checkPointMsg,
             "LJFF atom structures read successfully." );
    MPIcheckPoint();

    currentAtomType = headAtomType->next; //skip the first element who is a place holder.
    while( currentAtomType != NULL ){
      currentAtomType->duplicate( info );

 
      sendFrcStruct( &info, mpiAtomStructType );

      sprintf( checkPointMsg,
               "successfully sent lJ force type: \"%s\"\n",
               info.name );
      MPIcheckPoint();

      currentAtomType = currentAtomType->next;
    }
    info.last = 1;
    sendFrcStruct( &info, mpiAtomStructType );
    
  }

  else{
    
    // listen for node 0 to send out the force params
    
    MPIcheckPoint();

    headAtomType = new LinkedAtomType;
    recieveFrcStruct( &info, mpiAtomStructType );
    
    while( !info.last ){


      headAtomType->add( info );
      
      MPIcheckPoint();

      recieveFrcStruct( &info, mpiAtomStructType );
    }
  }
#endif // is_mpi

  // call new A_types in fortran
  
  int isError;

  // dummy variables
  int isLJ = 1;
  int isDipole = 0;
  int isSSD = 0;
  int isGB = 0;
  int isEAM = 0;
  double dipole = 0.0;
  
  currentAtomType = headAtomType;
  while( currentAtomType != NULL ){
    
    if( currentAtomType->name[0] != '\0' ){
      isError = 0;
      makeAtype( &(currentAtomType->ident),
                 &isLJ,
                 &isSSD,
                 &isDipole,
                 &isGB,
                 &isEAM,
                 &(currentAtomType->epslon),
                 &(currentAtomType->sigma),
                 &dipole,
                 &isError );
      if( isError ){
        sprintf( painCave.errMsg,
                 "Error initializing the \"%s\" atom type in fortran\n",
                 currentAtomType->name );
        painCave.isFatal = 1;
        simError();
      }
    }
    currentAtomType = currentAtomType->next;
  }
      
  entry_plug->useLJ = 1;

#ifdef IS_MPI
  sprintf( checkPointMsg,
           "LJFF atom structures successfully sent to fortran\n" );
  MPIcheckPoint();
#endif // is_mpi

}


void LJFF::initializeAtoms( int nAtoms, Atom** the_atoms ){
  
  int i;

  // initialize the atoms
  

  for( i=0; i<nAtoms; i++ ){
    
    currentAtomType = headAtomType->find( the_atoms[i]->getType() );
    if( currentAtomType == NULL ){
      sprintf( painCave.errMsg, 
               "AtomType error, %s not found in force file.\n",
               the_atoms[i]->getType() );
      painCave.isFatal = 1;
      simError();
    }
    
    the_atoms[i]->setMass( currentAtomType->mass );
    the_atoms[i]->setEpslon( currentAtomType->epslon );
    the_atoms[i]->setSigma( currentAtomType->sigma );
    the_atoms[i]->setIdent( currentAtomType->ident );
    the_atoms[i]->setLJ();

    if( bigSigma < currentAtomType->sigma ) bigSigma = currentAtomType->sigma;
  }
}

void LJFF::initializeBonds( int nBonds, Bond** BondArray,
                             bond_pair* the_bonds ){
  
    if( nBonds ){
      sprintf( painCave.errMsg,
               "LJFF does not support bonds.\n" );
      painCave.isFatal = 1;
      simError();
    }
}

void LJFF::initializeBends( int nBends, Bend** bendArray,
                             bend_set* the_bends ){

    if( nBends ){
      sprintf( painCave.errMsg,
               "LJFF does not support bends.\n" );
      painCave.isFatal = 1;
      simError();
    }
}

void LJFF::initializeTorsions( int nTorsions, Torsion** torsionArray,
                                torsion_set* the_torsions ){

    if( nTorsions ){
      sprintf( painCave.errMsg,
               "LJFF does not support torsions.\n" );
      painCave.isFatal = 1;
      simError();
    }
}

void LJFF::fastForward( char* stopText, char* searchOwner ){

  int foundText = 0;
  char* the_token;

  rewind( frcFile );
  lineNum = 0;

  eof_test = fgets( readLine, sizeof(readLine), frcFile );
  lineNum++;
  if( eof_test == NULL ){
    sprintf( painCave.errMsg, "Error fast forwarding force file for %s: "
             " file is empty.\n",
             searchOwner );
    painCave.isFatal = 1;
    simError();
  }
  
  
  while( !foundText ){
    while( eof_test != NULL && readLine[0] != '#' ){
      eof_test = fgets( readLine, sizeof(readLine), frcFile );
      lineNum++;
    }
    if( eof_test == NULL ){
      sprintf( painCave.errMsg,
               "Error fast forwarding force file for %s at "
               "line %d: file ended unexpectedly.\n",
               searchOwner,
               lineNum );
      painCave.isFatal = 1;
      simError();
    }
    
    the_token = strtok( readLine, " ,;\t#\n" );
    foundText = !strcmp( stopText, the_token );
    
    if( !foundText ){
      eof_test = fgets( readLine, sizeof(readLine), frcFile );
      lineNum++;
      
      if( eof_test == NULL ){
        sprintf( painCave.errMsg, 
                 "Error fast forwarding force file for %s at "
                 "line %d: file ended unexpectedly.\n",
                 searchOwner,
                 lineNum );
        painCave.isFatal = 1;
        simError();
      } 
    }
  }  
}


int LJ_NS::parseAtom( char *lineBuffer, int lineNum,  atomStruct &info ){

  char* the_token;
  
  the_token = strtok( lineBuffer, " \n\t,;" );
  if( the_token != NULL ){
    
    strcpy( info.name, the_token );
          
    if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
      sprintf( painCave.errMsg, 
               "Error parseing AtomTypes: line %d\n", lineNum );
      painCave.isFatal = 1;
      simError();
    }
    
    info.mass = atof( the_token );
    
    if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
      sprintf( painCave.errMsg, 
               "Error parseing AtomTypes: line %d\n", lineNum );
      painCave.isFatal = 1;
      simError();
    }
        
    info.epslon = atof( the_token );
          
    if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
      sprintf( painCave.errMsg, 
               "Error parseing AtomTypes: line %d\n", lineNum );
      painCave.isFatal = 1;
      simError();
    }
        
    info.sigma = atof( the_token );
    
    return 1;
  }
  else return 0;
}
Revision:	829
Committed:	Tue Oct 28 16:03:37 2003 UTC (20 years, 8 months ago) by gezelter
File size:	11836 byte(s)
Log Message:	replace c++ header stuff with more portable c header stuff Also, mod file fixes and portability changes Some fortran changes will need to be reversed.
#	Content
1	#include <stdlib.h>
2	#include <stdio.h>
3	#include <string.h>
4
5	#include <iostream>
6	using namespace std;
7
8	#ifdef IS_MPI
9	#include <mpi.h>
10	#endif //is_mpi
11
12	#include "ForceFields.hpp"
13	#include "SRI.hpp"
14	#include "simError.h"
15
16	#include "fortranWrappers.hpp"
17
18	#ifdef IS_MPI
19	#include "mpiForceField.h"
20	#endif // is_mpi
21
22
23
24	namespace LJ_NS{
25
26	// Declare the structures that will be passed by the parser and MPI
27
28	typedef struct{
29	char name[15];
30	double mass;
31	double epslon;
32	double sigma;
33	int ident;
34	int last; // 0 -> default
35	// 1 -> in MPI: tells nodes to stop listening
36	} atomStruct;
37
38	int parseAtom( char *lineBuffer, int lineNum, atomStruct &info );
39
40	#ifdef IS_MPI
41
42	MPI_Datatype mpiAtomStructType;
43
44	#endif
45
46	class LinkedAtomType {
47	public:
48	LinkedAtomType(){
49	next = NULL;
50	name[0] = '\0';
51	}
52	~LinkedAtomType(){ if( next != NULL ) delete next; }
53
54	LinkedAtomType* find(char* key){
55	if( !strcmp(name, key) ) return this;
56	if( next != NULL ) return next->find(key);
57	return NULL;
58	}
59
60
61	void add( atomStruct &info ){
62
63	// check for duplicates
64
65	if( !strcmp( info.name, name ) ){
66	sprintf( painCave.errMsg,
67	"Duplicate LJ atom type \"%s\" found in "
68	"the LJFF param file./n",
69	name );
70	painCave.isFatal = 1;
71	simError();
72	}
73
74	if( next != NULL ) next->add(info);
75	else{
76	next = new LinkedAtomType();
77	strcpy(next->name, info.name);
78	next->mass = info.mass;
79	next->epslon = info.epslon;
80	next->sigma = info.sigma;
81	next->ident = info.ident;
82	}
83	}
84
85
86	#ifdef IS_MPI
87
88	void duplicate( atomStruct &info ){
89	strcpy(info.name, name);
90	info.mass = mass;
91	info.epslon = epslon;
92	info.sigma = sigma;
93	info.ident = ident;
94	info.last = 0;
95	}
96
97
98	#endif
99
100	char name[15];
101	double mass;
102	double epslon;
103	double sigma;
104	int ident;
105	LinkedAtomType* next;
106	};
107
108	LinkedAtomType* headAtomType;
109	LinkedAtomType* currentAtomType;
110
111	}
112
113	using namespace LJ_NS;
114
115	//****************************************************************
116	// begins the actual forcefield stuff.
117	//****************************************************************
118
119
120	LJFF::LJFF(){
121
122	char fileName[200];
123	char* ffPath_env = "FORCE_PARAM_PATH";
124	char* ffPath;
125	char temp[200];
126
127	headAtomType = NULL;
128	currentAtomType = NULL;
129
130	// do the funtion wrapping
131	wrapMeFF( this );
132
133	#ifdef IS_MPI
134	int i;
135
136	// **********************************************************************
137	// Init the atomStruct mpi type
138
139	atomStruct atomProto; // mpiPrototype
140	int atomBC[3] = {15,3,2}; // block counts
141	MPI_Aint atomDspls[3]; // displacements
142	MPI_Datatype atomMbrTypes[3]; // member mpi types
143
144	MPI_Address(&atomProto.name, &atomDspls[0]);
145	MPI_Address(&atomProto.mass, &atomDspls[1]);
146	MPI_Address(&atomProto.ident, &atomDspls[2]);
147
148	atomMbrTypes[0] = MPI_CHAR;
149	atomMbrTypes[1] = MPI_DOUBLE;
150	atomMbrTypes[2] = MPI_INT;
151
152	for (i=2; i >= 0; i--) atomDspls[i] -= atomDspls[0];
153
154	MPI_Type_struct(3, atomBC, atomDspls, atomMbrTypes, &mpiAtomStructType);
155	MPI_Type_commit(&mpiAtomStructType);
156
157	// ***********************************************************************
158
159	if( worldRank == 0 ){
160	#endif
161
162	// generate the force file name
163
164	strcpy( fileName, "LJFF.frc" );
165	fprintf( stderr,"Trying to open %s\n", fileName );
166
167	// attempt to open the file in the current directory first.
168
169	frcFile = fopen( fileName, "r" );
170
171	if( frcFile == NULL ){
172
173	// next see if the force path enviorment variable is set
174
175	ffPath = getenv( ffPath_env );
176	if( ffPath == NULL ) {
177	STR_DEFINE(ffPath, FRC_PATH );
178	}
179
180
181	strcpy( temp, ffPath );
182	strcat( temp, "/" );
183	strcat( temp, fileName );
184	strcpy( fileName, temp );
185
186	frcFile = fopen( fileName, "r" );
187
188	if( frcFile == NULL ){
189
190	sprintf( painCave.errMsg,
191	"Error opening the force field parameter file: %s\n"
192	"Have you tried setting the FORCE_PARAM_PATH environment "
193	"vairable?\n",
194	fileName );
195	painCave.isFatal = 1;
196	simError();
197	}
198	}
199
200	#ifdef IS_MPI
201	}
202
203	sprintf( checkPointMsg, "LJFF file opened sucessfully." );
204	MPIcheckPoint();
205
206	#endif // is_mpi
207	}
208
209
210	LJFF::~LJFF(){
211
212	if( headAtomType != NULL ) delete headAtomType;
213
214	#ifdef IS_MPI
215	if( worldRank == 0 ){
216	#endif // is_mpi
217
218	fclose( frcFile );
219
220	#ifdef IS_MPI
221	}
222	#endif // is_mpi
223	}
224
225	void LJFF::initForceField( int ljMixRule ){
226
227	initFortran( ljMixRule, 0 );
228	}
229
230	void LJFF::cleanMe( void ){
231
232	#ifdef IS_MPI
233
234	// keep the linked list in the mpi version
235
236	#else // is_mpi
237
238	// delete the linked list in the single processor version
239
240	if( headAtomType != NULL ) delete headAtomType;
241
242	#endif // is_mpi
243	}
244
245	void LJFF::readParams( void ){
246
247	atomStruct info;
248	info.last = 1; // initialize last to have the last set.
249	// if things go well, last will be set to 0
250
251	int identNum;
252
253
254	bigSigma = 0.0;
255	#ifdef IS_MPI
256	if( worldRank == 0 ){
257	#endif
258
259	// read in the atom types.
260
261	headAtomType = new LinkedAtomType;
262
263	fastForward( "AtomTypes", "initializeAtoms" );
264
265	// we are now at the AtomTypes section.
266
267	eof_test = fgets( readLine, sizeof(readLine), frcFile );
268	lineNum++;
269
270
271	// read a line, and start parseing out the atom types
272
273	if( eof_test == NULL ){
274	sprintf( painCave.errMsg,
275	"Error in reading Atoms from force file at line %d.\n",
276	lineNum );
277	painCave.isFatal = 1;
278	simError();
279	}
280
281	identNum = 1;
282	// stop reading at end of file, or at next section
283	while( readLine[0] != '#' && eof_test != NULL ){
284
285	// toss comment lines
286	if( readLine[0] != '!' ){
287
288	// the parser returns 0 if the line was blank
289	if( parseAtom( readLine, lineNum, info ) ){
290	info.ident = identNum;
291	headAtomType->add( info );;
292	identNum++;
293	}
294	}
295	eof_test = fgets( readLine, sizeof(readLine), frcFile );
296	lineNum++;
297	}
298
299	#ifdef IS_MPI
300
301	// send out the linked list to all the other processes
302
303	sprintf( checkPointMsg,
304	"LJFF atom structures read successfully." );
305	MPIcheckPoint();
306
307	currentAtomType = headAtomType->next; //skip the first element who is a place holder.
308	while( currentAtomType != NULL ){
309	currentAtomType->duplicate( info );
310
311
312
313	sendFrcStruct( &info, mpiAtomStructType );
314
315	sprintf( checkPointMsg,
316	"successfully sent lJ force type: \"%s\"\n",
317	info.name );
318	MPIcheckPoint();
319
320	currentAtomType = currentAtomType->next;
321	}
322	info.last = 1;
323	sendFrcStruct( &info, mpiAtomStructType );
324
325	}
326
327	else{
328
329	// listen for node 0 to send out the force params
330
331	MPIcheckPoint();
332
333	headAtomType = new LinkedAtomType;
334	recieveFrcStruct( &info, mpiAtomStructType );
335
336	while( !info.last ){
337
338
339
340	headAtomType->add( info );
341
342	MPIcheckPoint();
343
344	recieveFrcStruct( &info, mpiAtomStructType );
345	}
346	}
347	#endif // is_mpi
348
349	// call new A_types in fortran
350
351	int isError;
352
353	// dummy variables
354	int isLJ = 1;
355	int isDipole = 0;
356	int isSSD = 0;
357	int isGB = 0;
358	int isEAM = 0;
359	double dipole = 0.0;
360
361	currentAtomType = headAtomType;
362	while( currentAtomType != NULL ){
363
364	if( currentAtomType->name[0] != '\0' ){
365	isError = 0;
366	makeAtype( &(currentAtomType->ident),
367	&isLJ,
368	&isSSD,
369	&isDipole,
370	&isGB,
371	&isEAM,
372	&(currentAtomType->epslon),
373	&(currentAtomType->sigma),
374	&dipole,
375	&isError );
376	if( isError ){
377	sprintf( painCave.errMsg,
378	"Error initializing the \"%s\" atom type in fortran\n",
379	currentAtomType->name );
380	painCave.isFatal = 1;
381	simError();
382	}
383	}
384	currentAtomType = currentAtomType->next;
385	}
386
387	entry_plug->useLJ = 1;
388
389	#ifdef IS_MPI
390	sprintf( checkPointMsg,
391	"LJFF atom structures successfully sent to fortran\n" );
392	MPIcheckPoint();
393	#endif // is_mpi
394
395	}
396
397
398	void LJFF::initializeAtoms( int nAtoms, Atom** the_atoms ){
399
400	int i;
401
402	// initialize the atoms
403
404
405	for( i=0; i<nAtoms; i++ ){
406
407	currentAtomType = headAtomType->find( the_atoms[i]->getType() );
408	if( currentAtomType == NULL ){
409	sprintf( painCave.errMsg,
410	"AtomType error, %s not found in force file.\n",
411	the_atoms[i]->getType() );
412	painCave.isFatal = 1;
413	simError();
414	}
415
416	the_atoms[i]->setMass( currentAtomType->mass );
417	the_atoms[i]->setEpslon( currentAtomType->epslon );
418	the_atoms[i]->setSigma( currentAtomType->sigma );
419	the_atoms[i]->setIdent( currentAtomType->ident );
420	the_atoms[i]->setLJ();
421
422	if( bigSigma < currentAtomType->sigma ) bigSigma = currentAtomType->sigma;
423	}
424	}
425
426	void LJFF::initializeBonds( int nBonds, Bond** BondArray,
427	bond_pair* the_bonds ){
428
429	if( nBonds ){
430	sprintf( painCave.errMsg,
431	"LJFF does not support bonds.\n" );
432	painCave.isFatal = 1;
433	simError();
434	}
435	}
436
437	void LJFF::initializeBends( int nBends, Bend** bendArray,
438	bend_set* the_bends ){
439
440	if( nBends ){
441	sprintf( painCave.errMsg,
442	"LJFF does not support bends.\n" );
443	painCave.isFatal = 1;
444	simError();
445	}
446	}
447
448	void LJFF::initializeTorsions( int nTorsions, Torsion** torsionArray,
449	torsion_set* the_torsions ){
450
451	if( nTorsions ){
452	sprintf( painCave.errMsg,
453	"LJFF does not support torsions.\n" );
454	painCave.isFatal = 1;
455	simError();
456	}
457	}
458
459	void LJFF::fastForward( char* stopText, char* searchOwner ){
460
461	int foundText = 0;
462	char* the_token;
463
464	rewind( frcFile );
465	lineNum = 0;
466
467	eof_test = fgets( readLine, sizeof(readLine), frcFile );
468	lineNum++;
469	if( eof_test == NULL ){
470	sprintf( painCave.errMsg, "Error fast forwarding force file for %s: "
471	" file is empty.\n",
472	searchOwner );
473	painCave.isFatal = 1;
474	simError();
475	}
476
477
478	while( !foundText ){
479	while( eof_test != NULL && readLine[0] != '#' ){
480	eof_test = fgets( readLine, sizeof(readLine), frcFile );
481	lineNum++;
482	}
483	if( eof_test == NULL ){
484	sprintf( painCave.errMsg,
485	"Error fast forwarding force file for %s at "
486	"line %d: file ended unexpectedly.\n",
487	searchOwner,
488	lineNum );
489	painCave.isFatal = 1;
490	simError();
491	}
492
493	the_token = strtok( readLine, " ,;\t#\n" );
494	foundText = !strcmp( stopText, the_token );
495
496	if( !foundText ){
497	eof_test = fgets( readLine, sizeof(readLine), frcFile );
498	lineNum++;
499
500	if( eof_test == NULL ){
501	sprintf( painCave.errMsg,
502	"Error fast forwarding force file for %s at "
503	"line %d: file ended unexpectedly.\n",
504	searchOwner,
505	lineNum );
506	painCave.isFatal = 1;
507	simError();
508	}
509	}
510	}
511	}
512
513
514
515	int LJ_NS::parseAtom( char *lineBuffer, int lineNum, atomStruct &info ){
516
517	char* the_token;
518
519	the_token = strtok( lineBuffer, " \n\t,;" );
520	if( the_token != NULL ){
521
522	strcpy( info.name, the_token );
523
524	if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
525	sprintf( painCave.errMsg,
526	"Error parseing AtomTypes: line %d\n", lineNum );
527	painCave.isFatal = 1;
528	simError();
529	}
530
531	info.mass = atof( the_token );
532
533	if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
534	sprintf( painCave.errMsg,
535	"Error parseing AtomTypes: line %d\n", lineNum );
536	painCave.isFatal = 1;
537	simError();
538	}
539
540	info.epslon = atof( the_token );
541
542	if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
543	sprintf( painCave.errMsg,
544	"Error parseing AtomTypes: line %d\n", lineNum );
545	painCave.isFatal = 1;
546	simError();
547	}
548
549	info.sigma = atof( the_token );
550
551	return 1;
552	}
553	else return 0;
554	}