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input.cpp
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/* ----------------------------------------------------------------------
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.
------------------------------------------------------------------------- */
#include "mpi.h"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "input.h"
#include "universe.h"
#include "atom.h"
#include "atom_vec.h"
#include "comm.h"
#include "group.h"
#include "domain.h"
#include "output.h"
#include "thermo.h"
#include "force.h"
#include "pair.h"
#include "min.h"
#include "modify.h"
#include "bond.h"
#include "angle.h"
#include "dihedral.h"
#include "improper.h"
#include "kspace.h"
#include "update.h"
#include "neighbor.h"
#include "special.h"
#include "variable.h"
#include "error.h"
#include "memory.h"
#define CommandInclude
#include "style.h"
#undef CommandInclude
using namespace LAMMPS_NS;
#define MAXLINE 2048
#define DELTA 4
/* ---------------------------------------------------------------------- */
Input::Input(LAMMPS *lmp, int argc, char **argv) : Pointers(lmp)
{
MPI_Comm_rank(world,&me);
line = new char[MAXLINE];
copy = new char[MAXLINE];
work = new char[MAXLINE];
narg = maxarg = 0;
arg = NULL;
echo_screen = 0;
echo_log = 1;
label_active = 0;
labelstr = NULL;
jump_skip = 0;
if (me == 0) {
nfile = maxfile = 1;
infiles = (FILE **) memory->smalloc(sizeof(FILE *),"input:infiles");
infiles[0] = infile;
} else infiles = NULL;
variable = new Variable(lmp);
// process command-line args
// check for args "-var" and "-echo"
// caller has already checked that sufficient arguments exist
int iarg = 0;
while (iarg < argc) {
if (strcmp(argv[iarg],"-var") == 0) {
variable->set(argv[iarg+1],argv[iarg+2]);
iarg += 3;
} else if (strcmp(argv[iarg],"-echo") == 0) {
narg = 1;
char **tmp = arg; // trick echo() into using argv instead of arg
arg = &argv[iarg+1];
echo();
arg = tmp;
iarg += 2;
} else iarg++;
}
}
/* ---------------------------------------------------------------------- */
Input::~Input()
{
// don't free command and arg strings
// they just point to other allocated memory
delete variable;
delete [] line;
delete [] copy;
delete [] work;
if (labelstr) delete [] labelstr;
if (arg) memory->sfree(arg);
if (infiles) memory->sfree(infiles);
}
/* ----------------------------------------------------------------------
process all input from infile
infile = stdin or file if command-line arg "-in" was used
------------------------------------------------------------------------- */
void Input::file()
{
int n;
while (1) {
// read one line from input script
// if line ends in continuation char '&', concatenate next line(s)
// n = str length of line
if (me == 0) {
if (fgets(line,MAXLINE,infile) == NULL) n = 0;
else n = strlen(line) + 1;
while (n >= 3 && line[n-3] == '&') {
if (fgets(&line[n-3],MAXLINE-n+3,infile) == NULL) n = 0;
else n = strlen(line) + 1;
}
}
// bcast the line
// if n = 0, end-of-file
// error if label_active is set, since label wasn't encountered
// if original input file, code is done
// else go back to previous input file
MPI_Bcast(&n,1,MPI_INT,0,world);
if (n == 0) {
if (label_active) error->all("Label wasn't found in input script");
if (me == 0) {
if (infile != stdin) fclose(infile);
nfile--;
}
MPI_Bcast(&nfile,1,MPI_INT,0,world);
if (nfile == 0) break;
if (me == 0) infile = infiles[nfile-1];
continue;
}
MPI_Bcast(line,n,MPI_CHAR,0,world);
// if n = MAXLINE, line is too long
if (n == MAXLINE) {
char str[MAXLINE+32];
sprintf(str,"Input line too long: %s",line);
error->all(str);
}
// echo the command unless scanning for label
if (me == 0 && label_active == 0) {
if (echo_screen && screen) fprintf(screen,"%s",line);
if (echo_log && logfile) fprintf(logfile,"%s",line);
}
// parse the line
// if no command, skip to next line in input script
parse();
if (command == NULL) continue;
// if scanning for label, skip command unless it's a label command
if (label_active && strcmp(command,"label") != 0) continue;
// execute the command
if (execute_command()) {
char str[MAXLINE];
sprintf(str,"Unknown command: %s",line);
error->all(str);
}
}
}
/* ----------------------------------------------------------------------
process all input from filename
------------------------------------------------------------------------- */
void Input::file(char *filename)
{
// error if another nested file still open
// if single open file is not stdin, close it
// open new filename and set infile, infiles[0]
if (me == 0) {
if (nfile > 1)
error->one("Another input script is already being processed");
if (infile != stdin) fclose(infile);
infile = fopen(filename,"r");
if (infile == NULL) {
char str[128];
sprintf(str,"Cannot open input script %s",filename);
error->one(str);
}
infiles[0] = infile;
} else infile = NULL;
file();
}
/* ----------------------------------------------------------------------
parse the command in single and execute it
return command name to caller
------------------------------------------------------------------------- */
char *Input::one(char *single)
{
strcpy(line,single);
// echo the command unless scanning for label
if (me == 0 && label_active == 0) {
if (echo_screen && screen) fprintf(screen,"%s",line);
if (echo_log && logfile) fprintf(logfile,"%s",line);
}
// parse the line
// if no command, just return NULL
parse();
if (command == NULL) return NULL;
// if scanning for label, skip command unless it's a label command
if (label_active && strcmp(command,"label") != 0) return NULL;
// execute the command and return its name
if (execute_command()) {
char str[MAXLINE];
sprintf(str,"Unknown command: %s",line);
error->all(str);
}
return command;
}
/* ----------------------------------------------------------------------
parse copy of command line
strip comment = all chars from # on
replace all $ via variable substitution
command = first word
narg = # of args
arg[] = individual args
treat multiple args between double quotes as one arg
------------------------------------------------------------------------- */
void Input::parse()
{
// make a copy to work on
strcpy(copy,line);
// strip any # comment by resetting string terminator
// do not strip # inside double quotes
int level = 0;
char *ptr = copy;
while (*ptr) {
if (*ptr == '#' && level == 0) {
*ptr = '\0';
break;
}
if (*ptr == '"') {
if (level == 0) level = 1;
else level = 0;
}
ptr++;
}
// perform $ variable substitution (print changes)
substitute(copy,1);
// command = 1st arg
command = strtok(copy," \t\n\r\f");
if (command == NULL) return;
// point arg[] at each subsequent arg
// treat text between double quotes as one arg
// insert string terminators in copy to delimit args
narg = 0;
while (1) {
if (narg == maxarg) {
maxarg += DELTA;
arg = (char **) memory->srealloc(arg,maxarg*sizeof(char *),"input:arg");
}
arg[narg] = strtok(NULL," \t\n\r\f");
if (arg[narg] && arg[narg][0] == '\"') {
arg[narg] = &arg[narg][1];
if (strchr(arg[narg],'\"')) error->all("Quotes in a single arg");
arg[narg][strlen(arg[narg])] = ' ';
ptr = strtok(NULL,"\"");
if (ptr == NULL) error->all("Unbalanced quotes in input line");
}
if (arg[narg]) narg++;
else break;
}
}
/* ----------------------------------------------------------------------
substitute for $ variables in str
print updated string if flag is set and not searching for label
------------------------------------------------------------------------- */
void Input::substitute(char *str, int flag)
{
// use work[] as scratch space to expand str
// do not replace $ inside double quotes as flagged by level
// var = pts at variable name, ended by NULL
// if $ is followed by '{', trailing '}' becomes NULL
// else $x becomes x followed by NULL
// beyond = pts at text following variable
char *var,*value,*beyond;
int level = 0;
char *ptr = str;
while (*ptr) {
if (*ptr == '$' && level == 0) {
if (*(ptr+1) == '{') {
var = ptr+2;
int i = 0;
while (var[i] != '\0' && var[i] != '}') i++;
if (var[i] == '\0') error->one("Invalid variable name");
var[i] = '\0';
beyond = ptr + strlen(var) + 3;
} else {
var = ptr;
var[0] = var[1];
var[1] = '\0';
beyond = ptr + strlen(var) + 1;
}
value = variable->retrieve(var);
if (value == NULL) error->one("Substitution for undefined variable");
*ptr = '\0';
strcpy(work,str);
if (strlen(work)+strlen(value) >= MAXLINE)
error->one("Input line too long after variable substitution");
strcat(work,value);
if (strlen(work)+strlen(beyond) >= MAXLINE)
error->one("Input line too long after variable substitution");
strcat(work,beyond);
strcpy(str,work);
ptr += strlen(value);
if (flag && me == 0 && label_active == 0) {
if (echo_screen && screen) fprintf(screen,"%s",str);
if (echo_log && logfile) fprintf(logfile,"%s",str);
}
continue;
}
if (*ptr == '"') {
if (level == 0) level = 1;
else level = 0;
}
ptr++;
}
}
/* ----------------------------------------------------------------------
process a single parsed command
return 0 if successful, -1 if did not recognize command
------------------------------------------------------------------------- */
int Input::execute_command()
{
int flag = 1;
if (!strcmp(command,"clear")) clear();
else if (!strcmp(command,"echo")) echo();
else if (!strcmp(command,"include")) include();
else if (!strcmp(command,"jump")) jump();
else if (!strcmp(command,"label")) label();
else if (!strcmp(command,"log")) log();
else if (!strcmp(command,"next")) next_command();
else if (!strcmp(command,"print")) print();
else if (!strcmp(command,"variable")) variable_command();
else if (!strcmp(command,"angle_coeff")) angle_coeff();
else if (!strcmp(command,"angle_style")) angle_style();
else if (!strcmp(command,"atom_modify")) atom_modify();
else if (!strcmp(command,"atom_style")) atom_style();
else if (!strcmp(command,"bond_coeff")) bond_coeff();
else if (!strcmp(command,"bond_style")) bond_style();
else if (!strcmp(command,"boundary")) boundary();
else if (!strcmp(command,"compute")) compute();
else if (!strcmp(command,"compute_modify")) compute_modify();
else if (!strcmp(command,"dielectric")) dielectric();
else if (!strcmp(command,"dihedral_coeff")) dihedral_coeff();
else if (!strcmp(command,"dihedral_style")) dihedral_style();
else if (!strcmp(command,"dimension")) dimension();
else if (!strcmp(command,"dipole")) dipole();
else if (!strcmp(command,"dump")) dump();
else if (!strcmp(command,"dump_modify")) dump_modify();
else if (!strcmp(command,"fix")) fix();
else if (!strcmp(command,"fix_modify")) fix_modify();
else if (!strcmp(command,"group")) group_command();
else if (!strcmp(command,"improper_coeff")) improper_coeff();
else if (!strcmp(command,"improper_style")) improper_style();
else if (!strcmp(command,"kspace_modify")) kspace_modify();
else if (!strcmp(command,"kspace_style")) kspace_style();
else if (!strcmp(command,"lattice")) lattice();
else if (!strcmp(command,"mass")) mass();
else if (!strcmp(command,"min_modify")) min_modify();
else if (!strcmp(command,"min_style")) min_style();
else if (!strcmp(command,"neigh_modify")) neigh_modify();
else if (!strcmp(command,"neighbor")) neighbor_command();
else if (!strcmp(command,"newton")) newton();
else if (!strcmp(command,"pair_coeff")) pair_coeff();
else if (!strcmp(command,"pair_modify")) pair_modify();
else if (!strcmp(command,"pair_style")) pair_style();
else if (!strcmp(command,"pair_write")) pair_write();
else if (!strcmp(command,"processors")) processors();
else if (!strcmp(command,"region")) region();
else if (!strcmp(command,"reset_timestep")) reset_timestep();
else if (!strcmp(command,"restart")) restart();
else if (!strcmp(command,"run_style")) run_style();
else if (!strcmp(command,"special_bonds")) special_bonds();
else if (!strcmp(command,"thermo")) thermo();
else if (!strcmp(command,"thermo_modify")) thermo_modify();
else if (!strcmp(command,"thermo_style")) thermo_style();
else if (!strcmp(command,"timestep")) timestep();
else if (!strcmp(command,"undump")) undump();
else if (!strcmp(command,"unfix")) unfix();
else if (!strcmp(command,"units")) units();
else flag = 0;
if (flag) return 0;
if (0) return 0; // dummy line to enable else-if macro expansion
#define CommandClass
#define CommandStyle(key,Class) \
else if (strcmp(command,#key) == 0) { \
Class key(lmp); \
key.command(narg,arg); \
return 0; \
}
#include "style.h"
#undef CommandClass
return -1;
}
/* ---------------------------------------------------------------------- */
/* ---------------------------------------------------------------------- */
/* ---------------------------------------------------------------------- */
/* ---------------------------------------------------------------------- */
void Input::clear()
{
if (narg > 0) error->all("Illegal clear command");
lmp->destroy();
lmp->create();
}
/* ---------------------------------------------------------------------- */
void Input::echo()
{
if (narg != 1) error->all("Illegal echo command");
if (strcmp(arg[0],"none") == 0) {
echo_screen = 0;
echo_log = 0;
} else if (strcmp(arg[0],"screen") == 0) {
echo_screen = 1;
echo_log = 0;
} else if (strcmp(arg[0],"log") == 0) {
echo_screen = 0;
echo_log = 1;
} else if (strcmp(arg[0],"both") == 0) {
echo_screen = 1;
echo_log = 1;
} else error->all("Illegal echo command");
}
/* ---------------------------------------------------------------------- */
void Input::include()
{
if (narg != 1) error->all("Illegal include command");
if (me == 0) {
if (nfile == maxfile) {
maxfile++;
infiles = (FILE **)
memory->srealloc(infiles,maxfile*sizeof(FILE *),"input:infiles");
}
infile = fopen(arg[0],"r");
if (infile == NULL) {
char str[128];
sprintf(str,"Cannot open input script %s",arg[0]);
error->one(str);
}
infiles[nfile++] = infile;
}
}
/* ---------------------------------------------------------------------- */
void Input::jump()
{
if (narg < 1 || narg > 2) error->all("Illegal jump command");
if (jump_skip) {
jump_skip = 0;
return;
}
if (me == 0) {
if (infile != stdin) fclose(infile);
infile = fopen(arg[0],"r");
if (infile == NULL) {
char str[128];
sprintf(str,"Cannot open input script %s",arg[0]);
error->one(str);
}
infiles[nfile-1] = infile;
}
if (narg == 2) {
label_active = 1;
if (labelstr) delete [] labelstr;
int n = strlen(arg[1]) + 1;
labelstr = new char[n];
strcpy(labelstr,arg[1]);
}
}
/* ---------------------------------------------------------------------- */
void Input::label()
{
if (narg != 1) error->all("Illegal label command");
if (label_active && strcmp(labelstr,arg[0]) == 0) label_active = 0;
}
/* ---------------------------------------------------------------------- */
void Input::log()
{
if (narg != 1) error->all("Illegal log command");
if (me == 0) {
if (logfile) fclose(logfile);
if (strcmp(arg[0],"none") == 0) logfile = NULL;
else {
logfile = fopen(arg[0],"w");
if (logfile == NULL) {
char str[128];
sprintf(str,"Cannot open logfile %s",arg[0]);
error->one(str);
}
}
if (universe->nworlds == 1) universe->ulogfile = logfile;
}
}
/* ---------------------------------------------------------------------- */
void Input::next_command()
{
if (variable->next(narg,arg)) jump_skip = 1;
}
/* ---------------------------------------------------------------------- */
void Input::print()
{
if (narg < 1) error->all("Illegal print command");
char *str = new char[MAXLINE];
str[0] = '\0';
for (int iarg = 0; iarg < narg; iarg++) {
strcat(str,arg[iarg]);
strcat(str," ");
}
if (me == 0) {
if (screen) fprintf(screen,"%s\n",str);
if (logfile) fprintf(logfile,"%s\n",str);
}
delete [] str;
}
/* ---------------------------------------------------------------------- */
void Input::variable_command()
{
variable->set(narg,arg);
}
/* ---------------------------------------------------------------------- */
/* ---------------------------------------------------------------------- */
/* ---------------------------------------------------------------------- */
/* ----------------------------------------------------------------------
one function for each LAMMPS-specific input script command
------------------------------------------------------------------------- */
void Input::angle_coeff()
{
if (domain->box_exist == 0)
error->all("Angle_coeff command before simulation box is defined");
if (force->angle == NULL)
error->all("Angle_coeff command before angle_style is defined");
if (atom->avec->angles_allow == 0)
error->all("Angle_coeff command when no angles allowed");
force->angle->coeff(0,narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::angle_style()
{
if (narg < 1) error->all("Illegal angle_style command");
if (atom->avec->angles_allow == 0)
error->all("Angle_style command when no angles allowed");
force->create_angle(arg[0]);
if (force->angle) force->angle->settings(narg-1,&arg[1]);
}
/* ---------------------------------------------------------------------- */
void Input::atom_modify()
{
if (domain->box_exist)
error->all("Atom_modify command after simulation box is defined");
atom->modify_params(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::atom_style()
{
if (narg < 1) error->all("Illegal atom_style command");
if (domain->box_exist)
error->all("Atom_style command after simulation box is defined");
atom->create_avec(arg[0],narg-1,&arg[1]);
}
/* ---------------------------------------------------------------------- */
void Input::bond_coeff()
{
if (domain->box_exist == 0)
error->all("Bond_coeff command before simulation box is defined");
if (force->bond == NULL)
error->all("Bond_coeff command before bond_style is defined");
if (atom->avec->bonds_allow == 0)
error->all("Bond_coeff command when no bonds allowed");
force->bond->coeff(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::bond_style()
{
if (narg < 1) error->all("Illegal bond_style command");
if (atom->avec->bonds_allow == 0)
error->all("Bond_style command when no bonds allowed");
force->create_bond(arg[0]);
if (force->bond) force->bond->settings(narg-1,&arg[1]);
}
/* ---------------------------------------------------------------------- */
void Input::boundary()
{
if (domain->box_exist)
error->all("Boundary command after simulation box is defined");
domain->set_boundary(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::compute()
{
modify->add_compute(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::compute_modify()
{
modify->modify_compute(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::dielectric()
{
if (narg != 1) error->all("Illegal dielectric command");
force->dielectric = atof(arg[0]);
}
/* ---------------------------------------------------------------------- */
void Input::dihedral_coeff()
{
if (domain->box_exist == 0)
error->all("Dihedral_coeff command before simulation box is defined");
if (force->dihedral == NULL)
error->all("Dihedral_coeff command before dihedral_style is defined");
if (atom->avec->dihedrals_allow == 0)
error->all("Dihedral_coeff command when no dihedrals allowed");
force->dihedral->coeff(0,narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::dihedral_style()
{
if (narg < 1) error->all("Illegal dihedral_style command");
if (atom->avec->dihedrals_allow == 0)
error->all("Dihedral_style command when no dihedrals allowed");
force->create_dihedral(arg[0]);
if (force->dihedral) force->dihedral->settings(narg-1,&arg[1]);
}
/* ---------------------------------------------------------------------- */
void Input::dimension()
{
if (narg != 1) error->all("Illegal dimension command");
if (domain->box_exist)
error->all("Dimension command after simulation box is defined");
force->dimension = atoi(arg[0]);
}
/* ---------------------------------------------------------------------- */
void Input::dipole()
{
if (narg != 2) error->all("Illegal dipole command");
if (domain->box_exist == 0)
error->all("Dipole command before simulation box is defined");
atom->set_dipole(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::dump()
{
output->add_dump(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::dump_modify()
{
output->modify_dump(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::fix()
{
modify->add_fix(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::fix_modify()
{
modify->modify_fix(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::group_command()
{
group->assign(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::improper_coeff()
{
if (domain->box_exist == 0)
error->all("Improper_coeff command before simulation box is defined");
if (force->improper == NULL)
error->all("Improper_coeff command before improper_style is defined");
if (atom->avec->impropers_allow == 0)
error->all("Improper_coeff command when no impropers allowed");
force->improper->coeff(0,narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::improper_style()
{
if (narg < 1) error->all("Illegal improper_style command");
if (atom->avec->impropers_allow == 0)
error->all("Improper_style command when no impropers allowed");
force->create_improper(arg[0]);
if (force->improper) force->improper->settings(narg-1,&arg[1]);
}
/* ---------------------------------------------------------------------- */
void Input::kspace_modify()
{
if (force->kspace == NULL) error->all("KSpace style has not yet been set");
force->kspace->modify_params(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::kspace_style()
{
force->create_kspace(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::lattice()
{
domain->set_lattice(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::mass()
{
if (narg != 2) error->all("Illegal mass command");
if (domain->box_exist == 0)
error->all("Mass command before simulation box is defined");
atom->set_mass(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::min_modify()
{
update->minimize->modify_params(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::min_style()
{
if (domain->box_exist == 0)
error->all("Min_style command before simulation box is defined");
update->create_minimize(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::neigh_modify()
{
neighbor->modify_params(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::neighbor_command()
{
neighbor->set(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::newton()
{
int newton_pair,newton_bond;
if (narg == 1) {
if (strcmp(arg[0],"off") == 0) newton_pair = newton_bond = 0;
else if (strcmp(arg[0],"on") == 0) newton_pair = newton_bond = 1;
else error->all("Illegal newton command");
} else if (narg == 2) {
if (strcmp(arg[0],"off") == 0) newton_pair = 0;
else if (strcmp(arg[0],"on") == 0) newton_pair= 1;
else error->all("Illegal newton command");
if (strcmp(arg[1],"off") == 0) newton_bond = 0;
else if (strcmp(arg[1],"on") == 0) newton_bond = 1;
else error->all("Illegal newton command");
} else error->all("Illegal newton command");
force->newton_pair = newton_pair;
if (newton_bond == 0) {
if (domain->box_exist && force->newton_bond == 1)
error->all("Newton bond change after simulation box is defined");
force->newton_bond = 0;
} else {
if (domain->box_exist && force->newton_bond == 0)
error->all("Newton bond change after simulation box is defined");
force->newton_bond = 1;
}
if (newton_pair || newton_bond) force->newton = 1;
else force->newton = 0;
}
/* ---------------------------------------------------------------------- */
void Input::pair_coeff()
{
if (domain->box_exist == 0)
error->all("Pair_coeff command before simulation box is defined");
if (force->pair == NULL)
error->all("Pair_coeff command before pair_style is defined");
force->pair->coeff(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::pair_modify()
{
if (force->pair == NULL)
error->all("Pair_modify command before pair_style is defined");
force->pair->modify_params(narg,arg);
}
/* ----------------------------------------------------------------------
if old pair style exists and new style is same, just change settings
else create new pair class
------------------------------------------------------------------------- */
void Input::pair_style()
{
if (narg < 1) error->all("Illegal pair_style command");
if (force->pair && strcmp(arg[0],force->pair_style) == 0) {
force->pair->settings(narg-1,&arg[1]);
return;
}
force->create_pair(arg[0]);
if (force->pair) force->pair->settings(narg-1,&arg[1]);
}
/* ---------------------------------------------------------------------- */
void Input::pair_write()
{
if (force->pair == NULL)
error->all("Pair_write command before pair_style is defined");
force->pair->write_file(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::processors()
{
if (narg != 3) error->all("Illegal processors command");
if (domain->box_exist)
error->all("Processors command after simulation box is defined");
comm->user_procgrid[0] = atoi(arg[0]);
comm->user_procgrid[1] = atoi(arg[1]);
comm->user_procgrid[2] = atoi(arg[2]);
}
/* ---------------------------------------------------------------------- */
void Input::region()
{
domain->add_region(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::reset_timestep()
{
if (narg != 1) error->all("Illegal reset_timestep command");
update->ntimestep = atoi(arg[0]);
if (update->ntimestep < 0) error->all("Timestep must be >= 0");
}
/* ---------------------------------------------------------------------- */
void Input::restart()
{
output->create_restart(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::run_style()
{
if (domain->box_exist == 0)
error->all("Run_style command before simulation box is defined");
update->create_integrate(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::special_bonds()
{
// store 1-3,1-4 values before change
double lj2 = force->special_lj[2];
double lj3 = force->special_lj[3];
double coul2 = force->special_coul[2];
double coul3 = force->special_coul[3];
force->set_special(narg,arg);
// if simulation box defined and 1-3,1-4 values changed, redo special list
if (domain->box_exist && atom->molecular) {
if (lj2 != force->special_lj[2] || lj3 != force->special_lj[3] ||
coul2 != force->special_coul[2] || coul3 != force->special_coul[3]) {
Special special(lmp);
special.build();
}
}
}
/* ---------------------------------------------------------------------- */
void Input::thermo()
{
if (narg != 1) error->all("Illegal thermo command");
output->thermo_every = atoi(arg[0]);
}
/* ---------------------------------------------------------------------- */
void Input::thermo_modify()
{
output->thermo->modify_params(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::thermo_style()
{
output->create_thermo(narg,arg);
}
/* ---------------------------------------------------------------------- */
void Input::timestep()
{
if (narg != 1) error->all("Illegal timestep command");
update->dt = atof(arg[0]);
}
/* ---------------------------------------------------------------------- */
void Input::undump()
{
if (narg != 1) error->all("Illegal undump command");
output->delete_dump(arg[0]);
}
/* ---------------------------------------------------------------------- */
void Input::unfix()
{
if (narg != 1) error->all("Illegal unfix command");
modify->delete_fix(arg[0]);
}
/* ---------------------------------------------------------------------- */
void Input::units()
{
if (narg != 1) error->all("Illegal units command");
if (domain->box_exist)
error->all("Units command after simulation box is defined");
update->set_units(arg[0]);
}

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