 /* -*- mode: c; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*-
 *
 * $Id$
 *
 * Copyright (c) 2009-2014, Erik Lindahl & David van der Spoel
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
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 */

#ifndef _xdrfile_trr_h
#define _xdrfile_trr_h

#ifdef __cplusplus
extern "C" {
#endif

#include "xdrfile.h"
  
  /* All functions return exdrOK if succesfull. 
   * (error codes defined in xdrfile.h).
   */  
   
  /* This function returns the number of atoms in the xtc file in *natoms */
  extern int read_trr_natoms(char *fn,int *natoms);
  extern int read_trr_nframes(char* fn, unsigned long *nframes);
  
  /* Read one frame of an open xtc file. If either of x,v,f,box are
     NULL the arrays will be read from the file but not used.  */
  extern int read_trr(XDRFILE *xd,int natoms,int *step,float *t,float *lambda,
		      matrix box,rvec *x,rvec *v,rvec *f);

  /* Write a frame to xtc file */
  extern int write_trr(XDRFILE *xd,int natoms,int step,float t,float lambda,
		       matrix box,rvec *x,rvec *v,rvec *f);

  
#ifdef __cplusplus
}
#endif

#endif
