/usr/include/liggghts/pair_hybrid.h is in libliggghts-dev 3.0.3+repack-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 | /* ----------------------------------------------------------------------
   LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
   http://lammps.sandia.gov, Sandia National Laboratories
   Steve Plimpton, sjplimp@sandia.gov
   Copyright (2003) Sandia Corporation.  Under the terms of Contract
   DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
   certain rights in this software.  This software is distributed under
   the GNU General Public License.
   See the README file in the top-level LAMMPS directory.
------------------------------------------------------------------------- */
#ifdef PAIR_CLASS
PairStyle(hybrid,PairHybrid)
#else
#ifndef LMP_PAIR_HYBRID_H
#define LMP_PAIR_HYBRID_H
#include "stdio.h"
#include "pair.h"
namespace LAMMPS_NS {
class PairHybrid : public Pair {
 public:
  int nstyles;                  // # of sub-styles
  Pair **styles;                // list of Pair style classes
  char **keywords;              // style name of each Pair style
  int *multiple;                // 0 if style used once, else Mth instance
  PairHybrid(class LAMMPS *);
  virtual ~PairHybrid();
  void compute(int, int);
  void settings(int, char **);
  virtual void coeff(int, char **);
  void init_style();
  double init_one(int, int);
  void write_restart(FILE *);
  void read_restart(FILE *);
  double single(int, int, int, int, double, double, double, double &);
  void modify_params(int narg, char **arg);
  double memory_usage();
  void compute_inner();
  void compute_middle();
  void compute_outer(int, int);
  void *extract(const char *, int &);
  void reset_dt();
  int check_ijtype(int, int, char *);
 protected:
  int outerflag;                // toggle compute() when invoked by outer()
  int **nmap;                   // # of sub-styles itype,jtype points to
  int ***map;                   // list of sub-styles itype,jtype points to
  void allocate();
  void flags();
  virtual void modify_requests();
};
}
#endif
#endif
/* ERROR/WARNING messages:
E: Illegal ... command
Self-explanatory.  Check the input script syntax and compare to the
documentation for the command.  You can use -echo screen as a
command-line option when running LAMMPS to see the offending line.
E: Pair style hybrid cannot have hybrid as an argument
Self-explanatory.
E: Pair style hybrid cannot have none as an argument
Self-explanatory.
E: Incorrect args for pair coefficients
Self-explanatory.  Check the input script or data file.
E: Pair coeff for hybrid has invalid style
Style in pair coeff must have been listed in pair_style command.
E: Pair hybrid sub-style is not used
No pair_coeff command used a sub-style specified in the pair_style
command.
E: All pair coeffs are not set
All pair coefficients must be set in the data file or by the
pair_coeff command before running a simulation.
E: Invoked pair single on pair style none
A command (e.g. a dump) attempted to invoke the single() function on a
pair style none, which is illegal.  You are probably attempting to
compute per-atom quantities with an undefined pair style.
E: Pair hybrid sub-style does not support single call
You are attempting to invoke a single() call on a pair style
that doesn't support it.
E: Coulomb cutoffs of pair hybrid sub-styles do not match
If using a Kspace solver, all Coulomb cutoffs of long pair styles must
be the same.
*/
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