diff --git a/src/variable.cpp b/src/variable.cpp index 04dbd81d3..b9c5152d1 100644 --- a/src/variable.cpp +++ b/src/variable.cpp @@ -1,4169 +1,4169 @@ /* ---------------------------------------------------------------------- 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 "math.h" #include "stdlib.h" #include "string.h" #include "ctype.h" #include "unistd.h" #include "variable.h" #include "universe.h" #include "atom.h" #include "update.h" #include "group.h" #include "domain.h" #include "comm.h" #include "region.h" #include "modify.h" #include "compute.h" #include "fix.h" #include "fix_store.h" #include "output.h" #include "thermo.h" #include "random_mars.h" #include "math_const.h" #include "atom_masks.h" #include "memory.h" #include "error.h" #include "force.h" using namespace LAMMPS_NS; using namespace MathConst; #define VARDELTA 4 #define MAXLEVEL 4 #define MAXLINE 256 #define CHUNK 1024 #define MYROUND(a) (( a-floor(a) ) >= .5) ? ceil(a) : floor(a) enum{INDEX,LOOP,WORLD,UNIVERSE,ULOOP,STRING,GETENV, SCALARFILE,ATOMFILE,FORMAT,EQUAL,ATOM}; enum{ARG,OP}; // customize by adding a function // if add before OR, // also set precedence level in constructor and precedence length in *.h enum{DONE,ADD,SUBTRACT,MULTIPLY,DIVIDE,CARAT,MODULO,UNARY, NOT,EQ,NE,LT,LE,GT,GE,AND,OR, SQRT,EXP,LN,LOG,ABS,SIN,COS,TAN,ASIN,ACOS,ATAN,ATAN2, RANDOM,NORMAL,CEIL,FLOOR,ROUND,RAMP,STAGGER,LOGFREQ,STRIDE, VDISPLACE,SWIGGLE,CWIGGLE,GMASK,RMASK,GRMASK, VALUE,ATOMARRAY,TYPEARRAY,INTARRAY,BIGINTARRAY}; // customize by adding a special function enum{SUM,XMIN,XMAX,AVE,TRAP,SLOPE}; #define INVOKED_SCALAR 1 #define INVOKED_VECTOR 2 #define INVOKED_ARRAY 4 #define INVOKED_PERATOM 8 #define BIG 1.0e20 /* ---------------------------------------------------------------------- */ Variable::Variable(LAMMPS *lmp) : Pointers(lmp) { MPI_Comm_rank(world,&me); nvar = maxvar = 0; names = NULL; style = NULL; num = NULL; which = NULL; pad = NULL; reader = NULL; data = NULL; eval_in_progress = NULL; randomequal = NULL; randomatom = NULL; // customize by assigning a precedence level precedence[DONE] = 0; precedence[OR] = 1; precedence[AND] = 2; precedence[EQ] = precedence[NE] = 3; precedence[LT] = precedence[LE] = precedence[GT] = precedence[GE] = 4; precedence[ADD] = precedence[SUBTRACT] = 5; precedence[MULTIPLY] = precedence[DIVIDE] = precedence[MODULO] = 6; precedence[CARAT] = 7; precedence[UNARY] = precedence[NOT] = 8; } /* ---------------------------------------------------------------------- */ Variable::~Variable() { for (int i = 0; i < nvar; i++) { delete [] names[i]; delete reader[i]; if (style[i] == LOOP || style[i] == ULOOP) delete [] data[i][0]; else for (int j = 0; j < num[i]; j++) delete [] data[i][j]; delete [] data[i]; } memory->sfree(names); memory->destroy(style); memory->destroy(num); memory->destroy(which); memory->destroy(pad); memory->sfree(reader); memory->sfree(data); memory->destroy(eval_in_progress); delete randomequal; delete randomatom; } /* ---------------------------------------------------------------------- called by variable command in input script ------------------------------------------------------------------------- */ void Variable::set(int narg, char **arg) { if (narg < 2) error->all(FLERR,"Illegal variable command"); // DELETE // doesn't matter if variable no longer exists if (strcmp(arg[1],"delete") == 0) { if (narg != 2) error->all(FLERR,"Illegal variable command"); if (find(arg[0]) >= 0) remove(find(arg[0])); return; // INDEX // num = listed args, which = 1st value, data = copied args } else if (strcmp(arg[1],"index") == 0) { if (narg < 3) error->all(FLERR,"Illegal variable command"); if (find(arg[0]) >= 0) return; if (nvar == maxvar) grow(); style[nvar] = INDEX; num[nvar] = narg - 2; which[nvar] = 0; pad[nvar] = 0; data[nvar] = new char*[num[nvar]]; copy(num[nvar],&arg[2],data[nvar]); // LOOP // 1 arg + pad: num = N, which = 1st value, data = single string // 2 args + pad: num = N2, which = N1, data = single string } else if (strcmp(arg[1],"loop") == 0) { if (find(arg[0]) >= 0) return; if (nvar == maxvar) grow(); style[nvar] = LOOP; int nfirst,nlast; if (narg == 3 || (narg == 4 && strcmp(arg[3],"pad") == 0)) { nfirst = 1; nlast = force->inumeric(FLERR,arg[2]); if (nlast <= 0) error->all(FLERR,"Illegal variable command"); if (narg == 4 && strcmp(arg[3],"pad") == 0) { char digits[12]; sprintf(digits,"%d",nlast); pad[nvar] = strlen(digits); } else pad[nvar] = 0; } else if (narg == 4 || (narg == 5 && strcmp(arg[4],"pad") == 0)) { nfirst = force->inumeric(FLERR,arg[2]); nlast = force->inumeric(FLERR,arg[3]); if (nfirst > nlast || nlast < 0) error->all(FLERR,"Illegal variable command"); if (narg == 5 && strcmp(arg[4],"pad") == 0) { char digits[12]; sprintf(digits,"%d",nlast); pad[nvar] = strlen(digits); } else pad[nvar] = 0; } else error->all(FLERR,"Illegal variable command"); num[nvar] = nlast; which[nvar] = nfirst-1; data[nvar] = new char*[1]; data[nvar][0] = NULL; // WORLD // num = listed args, which = partition this proc is in, data = copied args // error check that num = # of worlds in universe } else if (strcmp(arg[1],"world") == 0) { if (narg < 3) error->all(FLERR,"Illegal variable command"); if (find(arg[0]) >= 0) return; if (nvar == maxvar) grow(); style[nvar] = WORLD; num[nvar] = narg - 2; if (num[nvar] != universe->nworlds) error->all(FLERR,"World variable count doesn't match # of partitions"); which[nvar] = universe->iworld; pad[nvar] = 0; data[nvar] = new char*[num[nvar]]; copy(num[nvar],&arg[2],data[nvar]); // UNIVERSE and ULOOP // for UNIVERSE: num = listed args, data = copied args // for ULOOP: num = N, data = single string // which = partition this proc is in // universe proc 0 creates lock file // error check that all other universe/uloop variables are same length } else if (strcmp(arg[1],"universe") == 0 || strcmp(arg[1],"uloop") == 0) { if (strcmp(arg[1],"universe") == 0) { if (narg < 3) error->all(FLERR,"Illegal variable command"); if (find(arg[0]) >= 0) return; if (nvar == maxvar) grow(); style[nvar] = UNIVERSE; num[nvar] = narg - 2; pad[nvar] = 0; data[nvar] = new char*[num[nvar]]; copy(num[nvar],&arg[2],data[nvar]); } else if (strcmp(arg[1],"uloop") == 0) { if (narg < 3 || narg > 4 || (narg == 4 && strcmp(arg[3],"pad") != 0)) error->all(FLERR,"Illegal variable command"); if (find(arg[0]) >= 0) return; if (nvar == maxvar) grow(); style[nvar] = ULOOP; num[nvar] = force->inumeric(FLERR,arg[2]); data[nvar] = new char*[1]; data[nvar][0] = NULL; if (narg == 4) { char digits[12]; sprintf(digits,"%d",num[nvar]); pad[nvar] = strlen(digits); } else pad[nvar] = 0; } if (num[nvar] < universe->nworlds) error->all(FLERR,"Universe/uloop variable count < # of partitions"); which[nvar] = universe->iworld; if (universe->me == 0) { FILE *fp = fopen("tmp.lammps.variable","w"); fprintf(fp,"%d\n",universe->nworlds); fclose(fp); } for (int jvar = 0; jvar < nvar; jvar++) if (num[jvar] && (style[jvar] == UNIVERSE || style[jvar] == ULOOP) && num[nvar] != num[jvar]) error->all(FLERR, "All universe/uloop variables must have same # of values"); // STRING // remove pre-existing var if also style STRING (allows it to be reset) // num = 1, which = 1st value // data = 1 value, string to eval } else if (strcmp(arg[1],"string") == 0) { if (narg != 3) error->all(FLERR,"Illegal variable command"); if (find(arg[0]) >= 0) { if (style[find(arg[0])] != STRING) error->all(FLERR,"Cannot redefine variable as a different style"); remove(find(arg[0])); } if (nvar == maxvar) grow(); style[nvar] = STRING; num[nvar] = 1; which[nvar] = 0; pad[nvar] = 0; data[nvar] = new char*[num[nvar]]; copy(1,&arg[2],data[nvar]); // GETENV // remove pre-existing var if also style GETENV (allows it to be reset) // num = 1, which = 1st value // data = 1 value, string to eval } else if (strcmp(arg[1],"getenv") == 0) { if (narg != 3) error->all(FLERR,"Illegal variable command"); if (find(arg[0]) >= 0) { if (style[find(arg[0])] != GETENV) error->all(FLERR,"Cannot redefine variable as a different style"); remove(find(arg[0])); } if (nvar == maxvar) grow(); style[nvar] = GETENV; num[nvar] = 1; which[nvar] = 0; pad[nvar] = 0; data[nvar] = new char*[num[nvar]]; copy(1,&arg[2],data[nvar]); data[nvar][1] = NULL; // SCALARFILE for strings or numbers // which = 1st value // data = 1 value, string to eval } else if (strcmp(arg[1],"file") == 0) { if (narg != 3) error->all(FLERR,"Illegal variable command"); if (find(arg[0]) >= 0) return; if (nvar == maxvar) grow(); style[nvar] = SCALARFILE; num[nvar] = 1; which[nvar] = 0; pad[nvar] = 0; data[nvar] = new char*[num[nvar]]; data[nvar][0] = new char[MAXLINE]; reader[nvar] = new VarReader(lmp,arg[0],arg[2],SCALARFILE); int flag = reader[nvar]->read_scalar(data[nvar][0]); if (flag) error->all(FLERR,"File variable could not read value"); // ATOMFILE for numbers // which = 1st value // data = NULL } else if (strcmp(arg[1],"atomfile") == 0) { if (narg != 3) error->all(FLERR,"Illegal variable command"); if (find(arg[0]) >= 0) return; if (nvar == maxvar) grow(); style[nvar] = ATOMFILE; num[nvar] = 1; which[nvar] = 0; pad[nvar] = 0; data[nvar] = new char*[num[nvar]]; data[nvar][0] = NULL; reader[nvar] = new VarReader(lmp,arg[0],arg[2],ATOMFILE); int flag = reader[nvar]->read_peratom(); if (flag) error->all(FLERR,"Atomfile variable could not read values"); // FORMAT // num = 3, which = 1st value // data = 3 values // 1st is name of variable to eval, 2nd is format string, // 3rd is filled on retrieval } else if (strcmp(arg[1],"format") == 0) { if (narg != 4) error->all(FLERR,"Illegal variable command"); if (find(arg[0]) >= 0) return; if (nvar == maxvar) grow(); style[nvar] = FORMAT; num[nvar] = 3; which[nvar] = 0; pad[nvar] = 0; data[nvar] = new char*[num[nvar]]; copy(2,&arg[2],data[nvar]); data[nvar][2] = NULL; // EQUAL // remove pre-existing var if also style EQUAL (allows it to be reset) // num = 2, which = 1st value // data = 2 values, 1st is string to eval, 2nd is filled on retrieval } else if (strcmp(arg[1],"equal") == 0) { if (narg != 3) error->all(FLERR,"Illegal variable command"); if (find(arg[0]) >= 0) { if (style[find(arg[0])] != EQUAL) error->all(FLERR,"Cannot redefine variable as a different style"); remove(find(arg[0])); } if (nvar == maxvar) grow(); style[nvar] = EQUAL; num[nvar] = 2; which[nvar] = 0; pad[nvar] = 0; data[nvar] = new char*[num[nvar]]; copy(1,&arg[2],data[nvar]); data[nvar][1] = NULL; // ATOM // remove pre-existing var if also style ATOM (allows it to be reset) // num = 1, which = 1st value // data = 1 value, string to eval } else if (strcmp(arg[1],"atom") == 0) { if (narg != 3) error->all(FLERR,"Illegal variable command"); if (find(arg[0]) >= 0) { if (style[find(arg[0])] != ATOM) error->all(FLERR,"Cannot redefine variable as a different style"); remove(find(arg[0])); } if (nvar == maxvar) grow(); style[nvar] = ATOM; num[nvar] = 1; which[nvar] = 0; pad[nvar] = 0; data[nvar] = new char*[num[nvar]]; copy(1,&arg[2],data[nvar]); } else error->all(FLERR,"Illegal variable command"); // set name of variable // must come at end, since STRING/EQUAL/ATOM reset may have removed name // name must be all alphanumeric chars or underscores int n = strlen(arg[0]) + 1; names[nvar] = new char[n]; strcpy(names[nvar],arg[0]); for (int i = 0; i < n-1; i++) if (!isalnum(names[nvar][i]) && names[nvar][i] != '_') error->all(FLERR,"Variable name must be alphanumeric or " "underscore characters"); nvar++; } /* ---------------------------------------------------------------------- INDEX variable created by command-line argument make it INDEX rather than STRING so cannot be re-defined in input script ------------------------------------------------------------------------- */ void Variable::set(char *name, int narg, char **arg) { char **newarg = new char*[2+narg]; newarg[0] = name; newarg[1] = (char *) "index"; for (int i = 0; i < narg; i++) newarg[2+i] = arg[i]; set(2+narg,newarg); delete [] newarg; } /* ---------------------------------------------------------------------- increment variable(s) return 0 if OK if successfully incremented return 1 if any variable is exhausted, free the variable to allow re-use ------------------------------------------------------------------------- */ int Variable::next(int narg, char **arg) { int ivar; if (narg == 0) error->all(FLERR,"Illegal next command"); // check that variables exist and are all the same style // exception: UNIVERSE and ULOOP variables can be mixed in same next command for (int iarg = 0; iarg < narg; iarg++) { ivar = find(arg[iarg]); if (ivar == -1) error->all(FLERR,"Invalid variable in next command"); if (style[ivar] == ULOOP && style[find(arg[0])] == UNIVERSE) continue; else if (style[ivar] == UNIVERSE && style[find(arg[0])] == ULOOP) continue; else if (style[ivar] != style[find(arg[0])]) error->all(FLERR,"All variables in next command must be same style"); } // invalid styles STRING or EQUAL or WORLD or ATOM or GETENV or FORMAT int istyle = style[find(arg[0])]; if (istyle == STRING || istyle == EQUAL || istyle == WORLD || istyle == GETENV || istyle == ATOM || istyle == FORMAT) error->all(FLERR,"Invalid variable style with next command"); // if istyle = UNIVERSE or ULOOP, insure all such variables are incremented if (istyle == UNIVERSE || istyle == ULOOP) for (int i = 0; i < nvar; i++) { if (style[i] != UNIVERSE && style[i] != ULOOP) continue; int iarg = 0; for (iarg = 0; iarg < narg; iarg++) if (strcmp(arg[iarg],names[i]) == 0) break; if (iarg == narg) error->universe_one(FLERR,"Next command must list all " "universe and uloop variables"); } // increment all variables in list // if any variable is exhausted, set flag = 1 and remove var to allow re-use int flag = 0; if (istyle == INDEX || istyle == LOOP) { for (int iarg = 0; iarg < narg; iarg++) { ivar = find(arg[iarg]); which[ivar]++; if (which[ivar] >= num[ivar]) { flag = 1; remove(ivar); } } } else if (istyle == SCALARFILE) { for (int iarg = 0; iarg < narg; iarg++) { ivar = find(arg[iarg]); int done = reader[ivar]->read_scalar(data[ivar][0]); if (done) { flag = 1; remove(ivar); } } } else if (istyle == ATOMFILE) { for (int iarg = 0; iarg < narg; iarg++) { ivar = find(arg[iarg]); int done = reader[ivar]->read_peratom(); if (done) { flag = 1; remove(ivar); } } } else if (istyle == UNIVERSE || istyle == ULOOP) { // wait until lock file can be created and owned by proc 0 of this world // rename() is not atomic in practice, but no known simple fix // means multiple procs can read/write file at the same time (bad!) // random delays help // delay for random fraction of 1 second before first rename() call // delay for random fraction of 1 second before subsequent tries // when successful, read next available index and Bcast it within my world int nextindex; if (me == 0) { int seed = 12345 + universe->me + which[find(arg[0])]; RanMars *random = new RanMars(lmp,seed); int delay = (int) (1000000*random->uniform()); usleep(delay); while (1) { if (!rename("tmp.lammps.variable","tmp.lammps.variable.lock")) break; delay = (int) (1000000*random->uniform()); usleep(delay); } delete random; FILE *fp = fopen("tmp.lammps.variable.lock","r"); fscanf(fp,"%d",&nextindex); //printf("READ %d %d\n",universe->me,nextindex); fclose(fp); fp = fopen("tmp.lammps.variable.lock","w"); fprintf(fp,"%d\n",nextindex+1); //printf("WRITE %d %d\n",universe->me,nextindex+1); fclose(fp); rename("tmp.lammps.variable.lock","tmp.lammps.variable"); if (universe->uscreen) fprintf(universe->uscreen, "Increment via next: value %d on partition %d\n", nextindex+1,universe->iworld); if (universe->ulogfile) fprintf(universe->ulogfile, "Increment via next: value %d on partition %d\n", nextindex+1,universe->iworld); } MPI_Bcast(&nextindex,1,MPI_INT,0,world); // set all variables in list to nextindex // must increment all UNIVERSE and ULOOP variables here // error check above tested for this for (int iarg = 0; iarg < narg; iarg++) { ivar = find(arg[iarg]); which[ivar] = nextindex; if (which[ivar] >= num[ivar]) { flag = 1; remove(ivar); } } } return flag; } /* ---------------------------------------------------------------------- return ptr to the data text associated with a variable if INDEX or WORLD or UNIVERSE or STRING or SCALARFILE var, return ptr to stored string if LOOP or ULOOP var, write int to data[0] and return ptr to string if EQUAL var, evaluate variable and put result in str if FORMAT var, evaluate its variable and put formatted result in str if GETENV var, query environment and put result in str if ATOM or ATOMFILE var, return NULL return NULL if no variable with name or which value is bad, caller must respond ------------------------------------------------------------------------- */ char *Variable::retrieve(char *name) { int ivar = find(name); if (ivar == -1) return NULL; if (which[ivar] >= num[ivar]) return NULL; char *str; if (style[ivar] == INDEX || style[ivar] == WORLD || style[ivar] == UNIVERSE || style[ivar] == STRING || style[ivar] == SCALARFILE) { str = data[ivar][which[ivar]]; } else if (style[ivar] == LOOP || style[ivar] == ULOOP) { char result[16]; if (pad[ivar] == 0) sprintf(result,"%d",which[ivar]+1); else { char padstr[16]; sprintf(padstr,"%%0%dd",pad[ivar]); sprintf(result,padstr,which[ivar]+1); } int n = strlen(result) + 1; delete [] data[ivar][0]; data[ivar][0] = new char[n]; strcpy(data[ivar][0],result); str = data[ivar][0]; } else if (style[ivar] == EQUAL) { char result[64]; double answer = evaluate(data[ivar][0],NULL); sprintf(result,"%.15g",answer); int n = strlen(result) + 1; if (data[ivar][1]) delete [] data[ivar][1]; data[ivar][1] = new char[n]; strcpy(data[ivar][1],result); str = data[ivar][1]; } else if (style[ivar] == FORMAT) { char result[64]; int jvar = find(data[ivar][0]); if (jvar == -1) return NULL; if (!equalstyle(jvar)) return NULL; double answer = evaluate(data[jvar][0],NULL); sprintf(result,data[ivar][1],answer); int n = strlen(result) + 1; if (data[ivar][2]) delete [] data[ivar][2]; data[ivar][2] = new char[n]; strcpy(data[ivar][2],result); str = data[ivar][2]; } else if (style[ivar] == GETENV) { const char *result = getenv(data[ivar][0]); if (data[ivar][1]) delete [] data[ivar][1]; if (result == NULL) result = (const char *)""; int n = strlen(result) + 1; data[ivar][1] = new char[n]; strcpy(data[ivar][1],result); str = data[ivar][1]; } else if (style[ivar] == ATOM || style[ivar] == ATOMFILE) return NULL; return str; } /* ---------------------------------------------------------------------- return result of equal-style variable evaluation ------------------------------------------------------------------------- */ double Variable::compute_equal(int ivar) { // eval_in_progress used to detect circle dependencies // could extend this later to check v_a = c_b + v_a constructs? eval_in_progress[ivar] = 1; double value = evaluate(data[ivar][0],NULL); eval_in_progress[ivar] = 0; return value; } /* ---------------------------------------------------------------------- return result of immediate equal-style variable evaluation called from Input::substitute() ------------------------------------------------------------------------- */ double Variable::compute_equal(char *str) { return evaluate(str,NULL); } /* ---------------------------------------------------------------------- compute result of atom-style and atomfile-style variable evaluation only computed for atoms in igroup, else result is 0.0 answers are placed every stride locations into result if sumflag, add variable values to existing result ------------------------------------------------------------------------- */ void Variable::compute_atom(int ivar, int igroup, double *result, int stride, int sumflag) { Tree *tree; double *vstore; if (style[ivar] == ATOM) { evaluate(data[ivar][0],&tree); collapse_tree(tree); } else vstore = reader[ivar]->fix->vstore; int groupbit = group->bitmask[igroup]; int *mask = atom->mask; int nlocal = atom->nlocal; if (style[ivar] == ATOM) { if (sumflag == 0) { int m = 0; for (int i = 0; i < nlocal; i++) { if (mask[i] & groupbit) result[m] = eval_tree(tree,i); else result[m] = 0.0; m += stride; } } else { int m = 0; for (int i = 0; i < nlocal; i++) { if (mask[i] & groupbit) result[m] += eval_tree(tree,i); m += stride; } } } else { if (sumflag == 0) { int m = 0; for (int i = 0; i < nlocal; i++) { if (mask[i] & groupbit) result[m] = vstore[i]; else result[m] = 0.0; m += stride; } } else { int m = 0; for (int i = 0; i < nlocal; i++) { if (mask[i] & groupbit) result[m] += vstore[i]; m += stride; } } } if (style[ivar] == ATOM) free_tree(tree); } /* ---------------------------------------------------------------------- search for name in list of variables names return index or -1 if not found ------------------------------------------------------------------------- */ int Variable::find(char *name) { for (int i = 0; i < nvar; i++) if (strcmp(name,names[i]) == 0) return i; return -1; } /* ---------------------------------------------------------------------- return 1 if variable is EQUAL style, 0 if not ------------------------------------------------------------------------- */ int Variable::equalstyle(int ivar) { if (style[ivar] == EQUAL) return 1; return 0; } /* ---------------------------------------------------------------------- return 1 if variable is ATOM or ATOMFILE style, 0 if not ------------------------------------------------------------------------- */ int Variable::atomstyle(int ivar) { if (style[ivar] == ATOM || style[ivar] == ATOMFILE) return 1; return 0; } /* ---------------------------------------------------------------------- remove Nth variable from list and compact list delete reader explicitly if it exists ------------------------------------------------------------------------- */ void Variable::remove(int n) { delete [] names[n]; if (style[n] == LOOP || style[n] == ULOOP) delete [] data[n][0]; else for (int i = 0; i < num[n]; i++) delete [] data[n][i]; delete [] data[n]; delete reader[n]; for (int i = n+1; i < nvar; i++) { names[i-1] = names[i]; style[i-1] = style[i]; num[i-1] = num[i]; which[i-1] = which[i]; pad[i-1] = pad[i]; reader[i-1] = reader[i]; data[i-1] = data[i]; } nvar--; } /* ---------------------------------------------------------------------- make space in arrays for new variable ------------------------------------------------------------------------- */ void Variable::grow() { int old = maxvar; maxvar += VARDELTA; names = (char **) memory->srealloc(names,maxvar*sizeof(char *),"var:names"); memory->grow(style,maxvar,"var:style"); memory->grow(num,maxvar,"var:num"); memory->grow(which,maxvar,"var:which"); memory->grow(pad,maxvar,"var:pad"); reader = (VarReader **) memory->srealloc(reader,maxvar*sizeof(VarReader *),"var:reader"); for (int i = old; i < maxvar; i++) reader[i] = NULL; data = (char ***) memory->srealloc(data,maxvar*sizeof(char **),"var:data"); memory->grow(eval_in_progress,maxvar,"var:eval_in_progress"); for (int i = 0; i < maxvar; i++) eval_in_progress[i] = 0; } /* ---------------------------------------------------------------------- copy narg strings from **from to **to, and allocate space for them ------------------------------------------------------------------------- */ void Variable::copy(int narg, char **from, char **to) { int n; for (int i = 0; i < narg; i++) { n = strlen(from[i]) + 1; to[i] = new char[n]; strcpy(to[i],from[i]); } } /* ---------------------------------------------------------------------- recursive evaluation of a string str str is an equal-style or atom-style formula containing one or more items: number = 0.0, -5.45, 2.8e-4, ... constant = PI thermo keyword = ke, vol, atoms, ... math operation = (),-x,x+y,x-y,x*y,x/y,x^y, x==y,x!=y,xy,x>=y,x&&y,x||y, sqrt(x),exp(x),ln(x),log(x),abs(x), sin(x),cos(x),tan(x),asin(x),atan2(y,x),... group function = count(group), mass(group), xcm(group,x), ... special function = sum(x),min(x), ... atom value = x[i], y[i], vx[i], ... atom vector = x, y, vx, ... compute = c_ID, c_ID[i], c_ID[i][j] fix = f_ID, f_ID[i], f_ID[i][j] variable = v_name, v_name[i] equal-style variables passes in tree = NULL: evaluate the formula, return result as a double atom-style variable passes in tree = non-NULL: parse the formula but do not evaluate it create a parse tree and return it ------------------------------------------------------------------------- */ double Variable::evaluate(char *str, Tree **tree) { int op,opprevious; double value1,value2; char onechar; char *ptr; double argstack[MAXLEVEL]; Tree *treestack[MAXLEVEL]; int opstack[MAXLEVEL]; int nargstack = 0; int ntreestack = 0; int nopstack = 0; int i = 0; int expect = ARG; while (1) { onechar = str[i]; // whitespace: just skip if (isspace(onechar)) i++; // ---------------- // parentheses: recursively evaluate contents of parens // ---------------- else if (onechar == '(') { if (expect == OP) error->all(FLERR,"Invalid syntax in variable formula"); expect = OP; char *contents; i = find_matching_paren(str,i,contents); i++; // evaluate contents and push on stack if (tree) { Tree *newtree; evaluate(contents,&newtree); treestack[ntreestack++] = newtree; } else argstack[nargstack++] = evaluate(contents,NULL); delete [] contents; // ---------------- // number: push value onto stack // ---------------- } else if (isdigit(onechar) || onechar == '.') { if (expect == OP) error->all(FLERR,"Invalid syntax in variable formula"); expect = OP; // istop = end of number, including scientific notation int istart = i; while (isdigit(str[i]) || str[i] == '.') i++; if (str[i] == 'e' || str[i] == 'E') { i++; if (str[i] == '+' || str[i] == '-') i++; while (isdigit(str[i])) i++; } int istop = i - 1; int n = istop - istart + 1; char *number = new char[n+1]; strncpy(number,&str[istart],n); number[n] = '\0'; if (tree) { Tree *newtree = new Tree(); newtree->type = VALUE; newtree->value = atof(number); newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else argstack[nargstack++] = atof(number); delete [] number; // ---------------- // letter: c_ID, c_ID[], c_ID[][], f_ID, f_ID[], f_ID[][], // v_name, v_name[], exp(), xcm(,), x, x[], PI, vol // ---------------- } else if (isalpha(onechar)) { if (expect == OP) error->all(FLERR,"Invalid syntax in variable formula"); expect = OP; // istop = end of word // word = all alphanumeric or underscore int istart = i; while (isalnum(str[i]) || str[i] == '_') i++; int istop = i-1; int n = istop - istart + 1; char *word = new char[n+1]; strncpy(word,&str[istart],n); word[n] = '\0'; // ---------------- // compute // ---------------- if (strncmp(word,"c_",2) == 0) { if (domain->box_exist == 0) error->all(FLERR, "Variable evaluation before simulation box is defined"); n = strlen(word) - 2 + 1; char *id = new char[n]; strcpy(id,&word[2]); int icompute = modify->find_compute(id); if (icompute < 0) error->all(FLERR,"Invalid compute ID in variable formula"); Compute *compute = modify->compute[icompute]; delete [] id; // parse zero or one or two trailing brackets // point i beyond last bracket // nbracket = # of bracket pairs // index1,index2 = int inside each bracket pair int nbracket,index1,index2; if (str[i] != '[') nbracket = 0; else { nbracket = 1; ptr = &str[i]; index1 = int_between_brackets(ptr); i = ptr-str+1; if (str[i] == '[') { nbracket = 2; ptr = &str[i]; index2 = int_between_brackets(ptr); i = ptr-str+1; } } // c_ID = scalar from global scalar if (nbracket == 0 && compute->scalar_flag) { if (update->whichflag == 0) { if (compute->invoked_scalar != update->ntimestep) error->all(FLERR,"Compute used in variable between runs " "is not current"); } else if (!(compute->invoked_flag & INVOKED_SCALAR)) { compute->compute_scalar(); compute->invoked_flag |= INVOKED_SCALAR; } value1 = compute->scalar; if (tree) { Tree *newtree = new Tree(); newtree->type = VALUE; newtree->value = value1; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else argstack[nargstack++] = value1; // c_ID[i] = scalar from global vector } else if (nbracket == 1 && compute->vector_flag) { if (index1 > compute->size_vector) error->all(FLERR,"Variable formula compute vector " "is accessed out-of-range"); if (update->whichflag == 0) { if (compute->invoked_vector != update->ntimestep) error->all(FLERR,"Compute used in variable between runs " "is not current"); } else if (!(compute->invoked_flag & INVOKED_VECTOR)) { compute->compute_vector(); compute->invoked_flag |= INVOKED_VECTOR; } value1 = compute->vector[index1-1]; if (tree) { Tree *newtree = new Tree(); newtree->type = VALUE; newtree->value = value1; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else argstack[nargstack++] = value1; // c_ID[i][j] = scalar from global array } else if (nbracket == 2 && compute->array_flag) { if (index1 > compute->size_array_rows) error->all(FLERR,"Variable formula compute array " "is accessed out-of-range"); if (index2 > compute->size_array_cols) error->all(FLERR,"Variable formula compute array " "is accessed out-of-range"); if (update->whichflag == 0) { if (compute->invoked_array != update->ntimestep) error->all(FLERR,"Compute used in variable between runs " "is not current"); } else if (!(compute->invoked_flag & INVOKED_ARRAY)) { compute->compute_array(); compute->invoked_flag |= INVOKED_ARRAY; } value1 = compute->array[index1-1][index2-1]; if (tree) { Tree *newtree = new Tree(); newtree->type = VALUE; newtree->value = value1; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else argstack[nargstack++] = value1; // c_ID[i] = scalar from per-atom vector } else if (nbracket == 1 && compute->peratom_flag && compute->size_peratom_cols == 0) { if (update->whichflag == 0) { if (compute->invoked_peratom != update->ntimestep) error->all(FLERR,"Compute used in variable between runs " "is not current"); } else if (!(compute->invoked_flag & INVOKED_PERATOM)) { compute->compute_peratom(); compute->invoked_flag |= INVOKED_PERATOM; } peratom2global(1,NULL,compute->vector_atom,1,index1, tree,treestack,ntreestack,argstack,nargstack); // c_ID[i][j] = scalar from per-atom array } else if (nbracket == 2 && compute->peratom_flag && compute->size_peratom_cols > 0) { if (index2 > compute->size_peratom_cols) error->all(FLERR,"Variable formula compute array " "is accessed out-of-range"); if (update->whichflag == 0) { if (compute->invoked_peratom != update->ntimestep) error->all(FLERR,"Compute used in variable between runs " "is not current"); } else if (!(compute->invoked_flag & INVOKED_PERATOM)) { compute->compute_peratom(); compute->invoked_flag |= INVOKED_PERATOM; } if (compute->array_atom) peratom2global(1,NULL,&compute->array_atom[0][index2-1], compute->size_peratom_cols,index1, tree,treestack,ntreestack,argstack,nargstack); else peratom2global(1,NULL,NULL, compute->size_peratom_cols,index1, tree,treestack,ntreestack,argstack,nargstack); // c_ID = vector from per-atom vector } else if (nbracket == 0 && compute->peratom_flag && compute->size_peratom_cols == 0) { if (tree == NULL) error->all(FLERR, "Per-atom compute in equal-style variable formula"); if (update->whichflag == 0) { if (compute->invoked_peratom != update->ntimestep) error->all(FLERR,"Compute used in variable between runs " "is not current"); } else if (!(compute->invoked_flag & INVOKED_PERATOM)) { compute->compute_peratom(); compute->invoked_flag |= INVOKED_PERATOM; } Tree *newtree = new Tree(); newtree->type = ATOMARRAY; newtree->array = compute->vector_atom; newtree->nstride = 1; newtree->selfalloc = 0; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; // c_ID[i] = vector from per-atom array } else if (nbracket == 1 && compute->peratom_flag && compute->size_peratom_cols > 0) { if (tree == NULL) error->all(FLERR, "Per-atom compute in equal-style variable formula"); if (index1 > compute->size_peratom_cols) error->all(FLERR,"Variable formula compute array " "is accessed out-of-range"); if (update->whichflag == 0) { if (compute->invoked_peratom != update->ntimestep) error->all(FLERR,"Compute used in variable between runs " "is not current"); } else if (!(compute->invoked_flag & INVOKED_PERATOM)) { compute->compute_peratom(); compute->invoked_flag |= INVOKED_PERATOM; } Tree *newtree = new Tree(); newtree->type = ATOMARRAY; if (compute->array_atom) newtree->array = &compute->array_atom[0][index1-1]; else newtree->array = NULL; newtree->nstride = compute->size_peratom_cols; newtree->selfalloc = 0; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else error->all(FLERR,"Mismatched compute in variable formula"); // ---------------- // fix // ---------------- } else if (strncmp(word,"f_",2) == 0) { if (domain->box_exist == 0) error->all(FLERR, "Variable evaluation before simulation box is defined"); n = strlen(word) - 2 + 1; char *id = new char[n]; strcpy(id,&word[2]); int ifix = modify->find_fix(id); if (ifix < 0) error->all(FLERR,"Invalid fix ID in variable formula"); Fix *fix = modify->fix[ifix]; delete [] id; // parse zero or one or two trailing brackets // point i beyond last bracket // nbracket = # of bracket pairs // index1,index2 = int inside each bracket pair int nbracket,index1,index2; if (str[i] != '[') nbracket = 0; else { nbracket = 1; ptr = &str[i]; index1 = int_between_brackets(ptr); i = ptr-str+1; if (str[i] == '[') { nbracket = 2; ptr = &str[i]; index2 = int_between_brackets(ptr); i = ptr-str+1; } } // f_ID = scalar from global scalar if (nbracket == 0 && fix->scalar_flag) { if (update->whichflag > 0 && update->ntimestep % fix->global_freq) error->all(FLERR,"Fix in variable not computed at compatible time"); value1 = fix->compute_scalar(); if (tree) { Tree *newtree = new Tree(); newtree->type = VALUE; newtree->value = value1; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else argstack[nargstack++] = value1; // f_ID[i] = scalar from global vector } else if (nbracket == 1 && fix->vector_flag) { if (index1 > fix->size_vector) error->all(FLERR, "Variable formula fix vector is accessed out-of-range"); if (update->whichflag > 0 && update->ntimestep % fix->global_freq) error->all(FLERR,"Fix in variable not computed at compatible time"); value1 = fix->compute_vector(index1-1); if (tree) { Tree *newtree = new Tree(); newtree->type = VALUE; newtree->value = value1; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else argstack[nargstack++] = value1; // f_ID[i][j] = scalar from global array } else if (nbracket == 2 && fix->array_flag) { if (index1 > fix->size_array_rows) error->all(FLERR, "Variable formula fix array is accessed out-of-range"); if (index2 > fix->size_array_cols) error->all(FLERR, "Variable formula fix array is accessed out-of-range"); if (update->whichflag > 0 && update->ntimestep % fix->global_freq) error->all(FLERR,"Fix in variable not computed at compatible time"); value1 = fix->compute_array(index1-1,index2-1); if (tree) { Tree *newtree = new Tree(); newtree->type = VALUE; newtree->value = value1; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else argstack[nargstack++] = value1; // f_ID[i] = scalar from per-atom vector } else if (nbracket == 1 && fix->peratom_flag && fix->size_peratom_cols == 0) { if (update->whichflag > 0 && update->ntimestep % fix->peratom_freq) error->all(FLERR, "Fix in variable not computed at compatible time"); peratom2global(1,NULL,fix->vector_atom,1,index1, tree,treestack,ntreestack,argstack,nargstack); // f_ID[i][j] = scalar from per-atom array } else if (nbracket == 2 && fix->peratom_flag && fix->size_peratom_cols > 0) { if (index2 > fix->size_peratom_cols) error->all(FLERR, "Variable formula fix array is accessed out-of-range"); if (update->whichflag > 0 && update->ntimestep % fix->peratom_freq) error->all(FLERR,"Fix in variable not computed at compatible time"); if (fix->array_atom) peratom2global(1,NULL,&fix->array_atom[0][index2-1], fix->size_peratom_cols,index1, tree,treestack,ntreestack,argstack,nargstack); else peratom2global(1,NULL,NULL, fix->size_peratom_cols,index1, tree,treestack,ntreestack,argstack,nargstack); // f_ID = vector from per-atom vector } else if (nbracket == 0 && fix->peratom_flag && fix->size_peratom_cols == 0) { if (tree == NULL) error->all(FLERR,"Per-atom fix in equal-style variable formula"); if (update->whichflag > 0 && update->ntimestep % fix->peratom_freq) error->all(FLERR,"Fix in variable not computed at compatible time"); Tree *newtree = new Tree(); newtree->type = ATOMARRAY; newtree->array = fix->vector_atom; newtree->nstride = 1; newtree->selfalloc = 0; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; // f_ID[i] = vector from per-atom array } else if (nbracket == 1 && fix->peratom_flag && fix->size_peratom_cols > 0) { if (tree == NULL) error->all(FLERR,"Per-atom fix in equal-style variable formula"); if (index1 > fix->size_peratom_cols) error->all(FLERR, "Variable formula fix array is accessed out-of-range"); if (update->whichflag > 0 && update->ntimestep % fix->peratom_freq) error->all(FLERR,"Fix in variable not computed at compatible time"); Tree *newtree = new Tree(); newtree->type = ATOMARRAY; if (fix->array_atom) newtree->array = &fix->array_atom[0][index1-1]; else newtree->array = NULL; newtree->nstride = fix->size_peratom_cols; newtree->selfalloc = 0; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else error->all(FLERR,"Mismatched fix in variable formula"); // ---------------- // variable // ---------------- } else if (strncmp(word,"v_",2) == 0) { n = strlen(word) - 2 + 1; char *id = new char[n]; strcpy(id,&word[2]); int ivar = find(id); if (ivar < 0) error->all(FLERR,"Invalid variable name in variable formula"); if (eval_in_progress[ivar]) error->all(FLERR,"Variable has circular dependency"); // parse zero or one trailing brackets // point i beyond last bracket // nbracket = # of bracket pairs // index = int inside bracket int nbracket,index; if (str[i] != '[') nbracket = 0; else { nbracket = 1; ptr = &str[i]; index = int_between_brackets(ptr); i = ptr-str+1; } // v_name = scalar from non atom/atomfile variable if (nbracket == 0 && style[ivar] != ATOM && style[ivar] != ATOMFILE) { char *var = retrieve(id); if (var == NULL) error->all(FLERR,"Invalid variable evaluation in variable formula"); if (tree) { Tree *newtree = new Tree(); newtree->type = VALUE; newtree->value = atof(var); newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else argstack[nargstack++] = atof(var); // v_name = per-atom vector from atom-style variable // evaluate the atom-style variable as newtree } else if (nbracket == 0 && style[ivar] == ATOM) { if (tree == NULL) error->all(FLERR, "Atom-style variable in equal-style variable formula"); Tree *newtree; evaluate(data[ivar][0],&newtree); treestack[ntreestack++] = newtree; // v_name = per-atom vector from atomfile-style variable } else if (nbracket == 0 && style[ivar] == ATOMFILE) { if (tree == NULL) error->all(FLERR,"Atomfile-style variable in " "equal-style variable formula"); Tree *newtree = new Tree(); newtree->type = ATOMARRAY; newtree->array = reader[ivar]->fix->vstore; newtree->nstride = 1; newtree->selfalloc = 0; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; // v_name[N] = scalar from atom-style variable // compute the per-atom variable in result // use peratom2global to extract single value from result } else if (nbracket && style[ivar] == ATOM) { double *result; memory->create(result,atom->nlocal,"variable:result"); compute_atom(ivar,0,result,1,0); peratom2global(1,NULL,result,1,index, tree,treestack,ntreestack,argstack,nargstack); memory->destroy(result); // v_name[N] = scalar from atomfile-style variable } else if (nbracket && style[ivar] == ATOMFILE) { peratom2global(1,NULL,reader[ivar]->fix->vstore,1,index, tree,treestack,ntreestack,argstack,nargstack); } else error->all(FLERR,"Mismatched variable in variable formula"); delete [] id; // ---------------- // math/group/special function or atom value/vector or // constant or thermo keyword // ---------------- } else { // ---------------- // math or group or special function // ---------------- if (str[i] == '(') { char *contents; i = find_matching_paren(str,i,contents); i++; if (math_function(word,contents,tree, treestack,ntreestack,argstack,nargstack)); else if (group_function(word,contents,tree, treestack,ntreestack,argstack,nargstack)); else if (special_function(word,contents,tree, treestack,ntreestack,argstack,nargstack)); else error->all(FLERR,"Invalid math/group/special function " "in variable formula"); delete [] contents; // ---------------- // atom value // ---------------- } else if (str[i] == '[') { if (domain->box_exist == 0) error->all(FLERR, "Variable evaluation before simulation box is defined"); ptr = &str[i]; int id = int_between_brackets(ptr); i = ptr-str+1; peratom2global(0,word,NULL,0,id, tree,treestack,ntreestack,argstack,nargstack); // ---------------- // atom vector // ---------------- } else if (is_atom_vector(word)) { if (domain->box_exist == 0) error->all(FLERR, "Variable evaluation before simulation box is defined"); atom_vector(word,tree,treestack,ntreestack); // ---------------- // constant // ---------------- } else if (is_constant(word)) { value1 = constant(word); if (tree) { Tree *newtree = new Tree(); newtree->type = VALUE; newtree->value = value1; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else argstack[nargstack++] = value1; // ---------------- // thermo keyword // ---------------- } else { if (domain->box_exist == 0) error->all(FLERR, "Variable evaluation before simulation box is defined"); int flag = output->thermo->evaluate_keyword(word,&value1); if (flag) error->all(FLERR,"Invalid thermo keyword in variable formula"); if (tree) { Tree *newtree = new Tree(); newtree->type = VALUE; newtree->value = value1; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else argstack[nargstack++] = value1; } } delete [] word; // ---------------- // math operator, including end-of-string // ---------------- } else if (strchr("+-*/^<>=!&|%\0",onechar)) { if (onechar == '+') op = ADD; else if (onechar == '-') op = SUBTRACT; else if (onechar == '*') op = MULTIPLY; else if (onechar == '/') op = DIVIDE; else if (onechar == '%') op = MODULO; else if (onechar == '^') op = CARAT; else if (onechar == '=') { if (str[i+1] != '=') error->all(FLERR,"Invalid syntax in variable formula"); op = EQ; i++; } else if (onechar == '!') { if (str[i+1] == '=') { op = NE; i++; } else op = NOT; } else if (onechar == '<') { if (str[i+1] != '=') op = LT; else { op = LE; i++; } } else if (onechar == '>') { if (str[i+1] != '=') op = GT; else { op = GE; i++; } } else if (onechar == '&') { if (str[i+1] != '&') error->all(FLERR,"Invalid syntax in variable formula"); op = AND; i++; } else if (onechar == '|') { if (str[i+1] != '|') error->all(FLERR,"Invalid syntax in variable formula"); op = OR; i++; } else op = DONE; i++; if (op == SUBTRACT && expect == ARG) { opstack[nopstack++] = UNARY; continue; } if (op == NOT && expect == ARG) { opstack[nopstack++] = op; continue; } if (expect == ARG) error->all(FLERR,"Invalid syntax in variable formula"); expect = ARG; // evaluate stack as deep as possible while respecting precedence // before pushing current op onto stack while (nopstack && precedence[opstack[nopstack-1]] >= precedence[op]) { opprevious = opstack[--nopstack]; if (tree) { Tree *newtree = new Tree(); newtree->type = opprevious; if (opprevious == UNARY) { newtree->left = treestack[--ntreestack]; newtree->middle = newtree->right = NULL; } else { newtree->right = treestack[--ntreestack]; newtree->middle = NULL; newtree->left = treestack[--ntreestack]; } treestack[ntreestack++] = newtree; } else { value2 = argstack[--nargstack]; if (opprevious != UNARY && opprevious != NOT) value1 = argstack[--nargstack]; if (opprevious == ADD) argstack[nargstack++] = value1 + value2; else if (opprevious == SUBTRACT) argstack[nargstack++] = value1 - value2; else if (opprevious == MULTIPLY) argstack[nargstack++] = value1 * value2; else if (opprevious == DIVIDE) { if (value2 == 0.0) error->all(FLERR,"Divide by 0 in variable formula"); argstack[nargstack++] = value1 / value2; } else if (opprevious == MODULO) { if (value2 == 0.0) error->all(FLERR,"Modulo 0 in variable formula"); argstack[nargstack++] = fmod(value1,value2); } else if (opprevious == CARAT) { if (value2 == 0.0) error->all(FLERR,"Power by 0 in variable formula"); argstack[nargstack++] = pow(value1,value2); } else if (opprevious == UNARY) { argstack[nargstack++] = -value2; } else if (opprevious == NOT) { if (value2 == 0.0) argstack[nargstack++] = 1.0; else argstack[nargstack++] = 0.0; } else if (opprevious == EQ) { if (value1 == value2) argstack[nargstack++] = 1.0; else argstack[nargstack++] = 0.0; } else if (opprevious == NE) { if (value1 != value2) argstack[nargstack++] = 1.0; else argstack[nargstack++] = 0.0; } else if (opprevious == LT) { if (value1 < value2) argstack[nargstack++] = 1.0; else argstack[nargstack++] = 0.0; } else if (opprevious == LE) { if (value1 <= value2) argstack[nargstack++] = 1.0; else argstack[nargstack++] = 0.0; } else if (opprevious == GT) { if (value1 > value2) argstack[nargstack++] = 1.0; else argstack[nargstack++] = 0.0; } else if (opprevious == GE) { if (value1 >= value2) argstack[nargstack++] = 1.0; else argstack[nargstack++] = 0.0; } else if (opprevious == AND) { if (value1 != 0.0 && value2 != 0.0) argstack[nargstack++] = 1.0; else argstack[nargstack++] = 0.0; } else if (opprevious == OR) { if (value1 != 0.0 || value2 != 0.0) argstack[nargstack++] = 1.0; else argstack[nargstack++] = 0.0; } } } // if end-of-string, break out of entire formula evaluation loop if (op == DONE) break; // push current operation onto stack opstack[nopstack++] = op; } else error->all(FLERR,"Invalid syntax in variable formula"); } if (nopstack) error->all(FLERR,"Invalid syntax in variable formula"); // for atom-style variable, return remaining tree // for equal-style variable, return remaining arg if (tree) { if (ntreestack != 1) error->all(FLERR,"Invalid syntax in variable formula"); *tree = treestack[0]; return 0.0; } else { if (nargstack != 1) error->all(FLERR,"Invalid syntax in variable formula"); return argstack[0]; } } /* ---------------------------------------------------------------------- one-time collapse of an atom-style variable parse tree tree was created by one-time parsing of formula string via evaulate() only keep tree nodes that depend on ATOMARRAY, TYPEARRAY, INTARRAY, BIGINTARRAY remainder is converted to single VALUE this enables optimal eval_tree loop over atoms customize by adding a function: sqrt(),exp(),ln(),log(),abs(),sin(),cos(),tan(),asin(),acos(),atan(), atan2(y,x),random(x,y,z),normal(x,y,z),ceil(),floor(),round(), ramp(x,y),stagger(x,y),logfreq(x,y,z),stride(x,y,z), vdisplace(x,y),swiggle(x,y,z),cwiggle(x,y,z), gmask(x),rmask(x),grmask(x,y) ---------------------------------------------------------------------- */ double Variable::collapse_tree(Tree *tree) { double arg1,arg2; if (tree->type == VALUE) return tree->value; if (tree->type == ATOMARRAY) return 0.0; if (tree->type == TYPEARRAY) return 0.0; if (tree->type == INTARRAY) return 0.0; if (tree->type == BIGINTARRAY) return 0.0; if (tree->type == ADD) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; tree->value = arg1 + arg2; return tree->value; } if (tree->type == SUBTRACT) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; tree->value = arg1 - arg2; return tree->value; } if (tree->type == MULTIPLY) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; tree->value = arg1 * arg2; return tree->value; } if (tree->type == DIVIDE) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (arg2 == 0.0) error->one(FLERR,"Divide by 0 in variable formula"); tree->value = arg1 / arg2; return tree->value; } if (tree->type == MODULO) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (arg2 == 0.0) error->one(FLERR,"Modulo 0 in variable formula"); tree->value = fmod(arg1,arg2); return tree->value; } if (tree->type == CARAT) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (arg2 == 0.0) error->one(FLERR,"Power by 0 in variable formula"); tree->value = pow(arg1,arg2); return tree->value; } if (tree->type == UNARY) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; tree->value = -arg1; return tree->value; } if (tree->type == NOT) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; if (arg1 == 0.0) tree->value = 1.0; else tree->value = 0.0; return tree->value; } if (tree->type == EQ) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (arg1 == arg2) tree->value = 1.0; else tree->value = 0.0; return tree->value; } if (tree->type == NE) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (arg1 != arg2) tree->value = 1.0; else tree->value = 0.0; return tree->value; } if (tree->type == LT) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (arg1 < arg2) tree->value = 1.0; else tree->value = 0.0; return tree->value; } if (tree->type == LE) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (arg1 <= arg2) tree->value = 1.0; else tree->value = 0.0; return tree->value; } if (tree->type == GT) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (arg1 > arg2) tree->value = 1.0; else tree->value = 0.0; return tree->value; } if (tree->type == GE) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (arg1 >= arg2) tree->value = 1.0; else tree->value = 0.0; return tree->value; } if (tree->type == AND) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (arg1 != 0.0 && arg2 != 0.0) tree->value = 1.0; else tree->value = 0.0; return tree->value; } if (tree->type == OR) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (arg1 != 0.0 || arg2 != 0.0) tree->value = 1.0; else tree->value = 0.0; return tree->value; } if (tree->type == SQRT) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; if (arg1 < 0.0) error->one(FLERR,"Sqrt of negative value in variable formula"); tree->value = sqrt(arg1); return tree->value; } if (tree->type == EXP) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; tree->value = exp(arg1); return tree->value; } if (tree->type == LN) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; if (arg1 <= 0.0) error->one(FLERR,"Log of zero/negative value in variable formula"); tree->value = log(arg1); return tree->value; } if (tree->type == LOG) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; if (arg1 <= 0.0) error->one(FLERR,"Log of zero/negative value in variable formula"); tree->value = log10(arg1); return tree->value; } if (tree->type == ABS) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; tree->value = fabs(arg1); return tree->value; } if (tree->type == SIN) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; tree->value = sin(arg1); return tree->value; } if (tree->type == COS) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; tree->value = cos(arg1); return tree->value; } if (tree->type == TAN) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; tree->value = tan(arg1); return tree->value; } if (tree->type == ASIN) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; if (arg1 < -1.0 || arg1 > 1.0) error->one(FLERR,"Arcsin of invalid value in variable formula"); tree->value = asin(arg1); return tree->value; } if (tree->type == ACOS) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; if (arg1 < -1.0 || arg1 > 1.0) error->one(FLERR,"Arccos of invalid value in variable formula"); tree->value = acos(arg1); return tree->value; } if (tree->type == ATAN) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; tree->value = atan(arg1); return tree->value; } if (tree->type == ATAN2) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; tree->value = atan2(arg1,arg2); return tree->value; } // random() or normal() do not become a single collapsed value if (tree->type == RANDOM) { collapse_tree(tree->left); collapse_tree(tree->middle); if (randomatom == NULL) { int seed = static_cast (collapse_tree(tree->right)); if (seed <= 0) error->one(FLERR,"Invalid math function in variable formula"); randomatom = new RanMars(lmp,seed+me); } return 0.0; } if (tree->type == NORMAL) { collapse_tree(tree->left); double sigma = collapse_tree(tree->middle); if (sigma < 0.0) error->one(FLERR,"Invalid math function in variable formula"); if (randomatom == NULL) { int seed = static_cast (collapse_tree(tree->right)); if (seed <= 0) error->one(FLERR,"Invalid math function in variable formula"); randomatom = new RanMars(lmp,seed+me); } return 0.0; } if (tree->type == CEIL) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; tree->value = ceil(arg1); return tree->value; } if (tree->type == FLOOR) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; tree->value = floor(arg1); return tree->value; } if (tree->type == ROUND) { arg1 = collapse_tree(tree->left); if (tree->left->type != VALUE) return 0.0; tree->type = VALUE; tree->value = MYROUND(arg1); return tree->value; } if (tree->type == RAMP) { arg1 = collapse_tree(tree->left); arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; double delta = update->ntimestep - update->beginstep; if (delta != 0.0) delta /= update->endstep - update->beginstep; tree->value = arg1 + delta*(arg2-arg1); return tree->value; } if (tree->type == STAGGER) { int ivalue1 = static_cast (collapse_tree(tree->left)); int ivalue2 = static_cast (collapse_tree(tree->right)); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (ivalue1 <= 0 || ivalue2 <= 0 || ivalue1 <= ivalue2) error->one(FLERR,"Invalid math function in variable formula"); int lower = update->ntimestep/ivalue1 * ivalue1; int delta = update->ntimestep - lower; if (delta < ivalue2) tree->value = lower+ivalue2; else tree->value = lower+ivalue1; return tree->value; } if (tree->type == LOGFREQ) { int ivalue1 = static_cast (collapse_tree(tree->left)); int ivalue2 = static_cast (collapse_tree(tree->middle)); int ivalue3 = static_cast (collapse_tree(tree->right)); if (tree->left->type != VALUE || tree->middle->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (ivalue1 <= 0 || ivalue2 <= 0 || ivalue3 <= 0 || ivalue2 >= ivalue3) error->one(FLERR,"Invalid math function in variable formula"); if (update->ntimestep < ivalue1) tree->value = ivalue1; else { int lower = ivalue1; while (update->ntimestep >= ivalue3*lower) lower *= ivalue3; int multiple = update->ntimestep/lower; if (multiple < ivalue2) tree->value = (multiple+1)*lower; else tree->value = lower*ivalue3; } return tree->value; } if (tree->type == STRIDE) { int ivalue1 = static_cast (collapse_tree(tree->left)); int ivalue2 = static_cast (collapse_tree(tree->middle)); int ivalue3 = static_cast (collapse_tree(tree->right)); if (tree->left->type != VALUE || tree->middle->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (ivalue1 < 0 || ivalue2 < 0 || ivalue3 <= 0 || ivalue1 > ivalue2) error->one(FLERR,"Invalid math function in variable formula"); if (update->ntimestep < ivalue1) tree->value = ivalue1; else if (update->ntimestep < ivalue2) { int offset = update->ntimestep - ivalue1; tree->value = ivalue1 + (offset/ivalue3)*ivalue3 + ivalue3; if (tree->value > ivalue2) tree->value = 9.0e18; } else tree->value = 9.0e18; return tree->value; } if (tree->type == VDISPLACE) { double arg1 = collapse_tree(tree->left); double arg2 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; double delta = update->ntimestep - update->beginstep; tree->value = arg1 + arg2*delta*update->dt; return tree->value; } if (tree->type == SWIGGLE) { double arg1 = collapse_tree(tree->left); double arg2 = collapse_tree(tree->middle); double arg3 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->middle->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (arg3 == 0.0) error->one(FLERR,"Invalid math function in variable formula"); double delta = update->ntimestep - update->beginstep; double omega = 2.0*MY_PI/arg3; tree->value = arg1 + arg2*sin(omega*delta*update->dt); return tree->value; } if (tree->type == CWIGGLE) { double arg1 = collapse_tree(tree->left); double arg2 = collapse_tree(tree->middle); double arg3 = collapse_tree(tree->right); if (tree->left->type != VALUE || tree->middle->type != VALUE || tree->right->type != VALUE) return 0.0; tree->type = VALUE; if (arg3 == 0.0) error->one(FLERR,"Invalid math function in variable formula"); double delta = update->ntimestep - update->beginstep; double omega = 2.0*MY_PI/arg3; tree->value = arg1 + arg2*(1.0-cos(omega*delta*update->dt)); return tree->value; } // mask functions do not become a single collapsed value if (tree->type == GMASK) return 0.0; if (tree->type == RMASK) return 0.0; if (tree->type == GRMASK) return 0.0; return 0.0; } /* ---------------------------------------------------------------------- evaluate an atom-style variable parse tree for atom I tree was created by one-time parsing of formula string via evaulate() customize by adding a function: sqrt(),exp(),ln(),log(),sin(),cos(),tan(),asin(),acos(),atan(), atan2(y,x),random(x,y,z),normal(x,y,z),ceil(),floor(),round(), ramp(x,y),stagger(x,y),logfreq(x,y,z),stride(x,y,z), vdisplace(x,y),swiggle(x,y,z),cwiggle(x,y,z), gmask(x),rmask(x),grmask(x,y) ---------------------------------------------------------------------- */ double Variable::eval_tree(Tree *tree, int i) { double arg,arg1,arg2,arg3; if (tree->type == VALUE) return tree->value; if (tree->type == ATOMARRAY) return tree->array[i*tree->nstride]; if (tree->type == TYPEARRAY) return tree->array[atom->type[i]]; if (tree->type == INTARRAY) return (double) tree->iarray[i*tree->nstride]; if (tree->type == BIGINTARRAY) return (double) tree->barray[i*tree->nstride]; if (tree->type == ADD) return eval_tree(tree->left,i) + eval_tree(tree->right,i); if (tree->type == SUBTRACT) return eval_tree(tree->left,i) - eval_tree(tree->right,i); if (tree->type == MULTIPLY) return eval_tree(tree->left,i) * eval_tree(tree->right,i); if (tree->type == DIVIDE) { double denom = eval_tree(tree->right,i); if (denom == 0.0) error->one(FLERR,"Divide by 0 in variable formula"); return eval_tree(tree->left,i) / denom; } if (tree->type == MODULO) { double denom = eval_tree(tree->right,i); if (denom == 0.0) error->one(FLERR,"Modulo 0 in variable formula"); return fmod(eval_tree(tree->left,i),denom); } if (tree->type == CARAT) { double exponent = eval_tree(tree->right,i); if (exponent == 0.0) error->one(FLERR,"Power by 0 in variable formula"); return pow(eval_tree(tree->left,i),exponent); } if (tree->type == UNARY) return -eval_tree(tree->left,i); if (tree->type == NOT) { if (eval_tree(tree->left,i) == 0.0) return 1.0; else return 0.0; } if (tree->type == EQ) { if (eval_tree(tree->left,i) == eval_tree(tree->right,i)) return 1.0; else return 0.0; } if (tree->type == NE) { if (eval_tree(tree->left,i) != eval_tree(tree->right,i)) return 1.0; else return 0.0; } if (tree->type == LT) { if (eval_tree(tree->left,i) < eval_tree(tree->right,i)) return 1.0; else return 0.0; } if (tree->type == LE) { if (eval_tree(tree->left,i) <= eval_tree(tree->right,i)) return 1.0; else return 0.0; } if (tree->type == GT) { if (eval_tree(tree->left,i) > eval_tree(tree->right,i)) return 1.0; else return 0.0; } if (tree->type == GE) { if (eval_tree(tree->left,i) >= eval_tree(tree->right,i)) return 1.0; else return 0.0; } if (tree->type == AND) { if (eval_tree(tree->left,i) != 0.0 && eval_tree(tree->right,i) != 0.0) return 1.0; else return 0.0; } if (tree->type == OR) { if (eval_tree(tree->left,i) != 0.0 || eval_tree(tree->right,i) != 0.0) return 1.0; else return 0.0; } if (tree->type == SQRT) { arg1 = eval_tree(tree->left,i); if (arg1 < 0.0) error->one(FLERR,"Sqrt of negative value in variable formula"); return sqrt(arg1); } if (tree->type == EXP) return exp(eval_tree(tree->left,i)); if (tree->type == LN) { arg1 = eval_tree(tree->left,i); if (arg1 <= 0.0) error->one(FLERR,"Log of zero/negative value in variable formula"); return log(arg1); } if (tree->type == LOG) { arg1 = eval_tree(tree->left,i); if (arg1 <= 0.0) error->one(FLERR,"Log of zero/negative value in variable formula"); return log10(arg1); } if (tree->type == ABS) return fabs(eval_tree(tree->left,i)); if (tree->type == SIN) return sin(eval_tree(tree->left,i)); if (tree->type == COS) return cos(eval_tree(tree->left,i)); if (tree->type == TAN) return tan(eval_tree(tree->left,i)); if (tree->type == ASIN) { arg1 = eval_tree(tree->left,i); if (arg1 < -1.0 || arg1 > 1.0) error->one(FLERR,"Arcsin of invalid value in variable formula"); return asin(arg1); } if (tree->type == ACOS) { arg1 = eval_tree(tree->left,i); if (arg1 < -1.0 || arg1 > 1.0) error->one(FLERR,"Arccos of invalid value in variable formula"); return acos(arg1); } if (tree->type == ATAN) return atan(eval_tree(tree->left,i)); if (tree->type == ATAN2) return atan2(eval_tree(tree->left,i),eval_tree(tree->right,i)); if (tree->type == RANDOM) { double lower = eval_tree(tree->left,i); double upper = eval_tree(tree->middle,i); if (randomatom == NULL) { int seed = static_cast (eval_tree(tree->right,i)); if (seed <= 0) error->one(FLERR,"Invalid math function in variable formula"); randomatom = new RanMars(lmp,seed+me); } return randomatom->uniform()*(upper-lower)+lower; } if (tree->type == NORMAL) { double mu = eval_tree(tree->left,i); double sigma = eval_tree(tree->middle,i); if (sigma < 0.0) error->one(FLERR,"Invalid math function in variable formula"); if (randomatom == NULL) { int seed = static_cast (eval_tree(tree->right,i)); if (seed <= 0) error->one(FLERR,"Invalid math function in variable formula"); randomatom = new RanMars(lmp,seed+me); } return mu + sigma*randomatom->gaussian(); } if (tree->type == CEIL) return ceil(eval_tree(tree->left,i)); if (tree->type == FLOOR) return floor(eval_tree(tree->left,i)); if (tree->type == ROUND) return MYROUND(eval_tree(tree->left,i)); if (tree->type == RAMP) { arg1 = eval_tree(tree->left,i); arg2 = eval_tree(tree->right,i); double delta = update->ntimestep - update->beginstep; if (delta != 0.0) delta /= update->endstep - update->beginstep; arg = arg1 + delta*(arg2-arg1); return arg; } if (tree->type == STAGGER) { int ivalue1 = static_cast (eval_tree(tree->left,i)); int ivalue2 = static_cast (eval_tree(tree->right,i)); if (ivalue1 <= 0 || ivalue2 <= 0 || ivalue1 <= ivalue2) error->one(FLERR,"Invalid math function in variable formula"); int lower = update->ntimestep/ivalue1 * ivalue1; int delta = update->ntimestep - lower; if (delta < ivalue2) arg = lower+ivalue2; else arg = lower+ivalue1; return arg; } if (tree->type == LOGFREQ) { int ivalue1 = static_cast (eval_tree(tree->left,i)); int ivalue2 = static_cast (eval_tree(tree->middle,i)); int ivalue3 = static_cast (eval_tree(tree->right,i)); if (ivalue1 <= 0 || ivalue2 <= 0 || ivalue3 <= 0 || ivalue2 >= ivalue3) error->one(FLERR,"Invalid math function in variable formula"); if (update->ntimestep < ivalue1) arg = ivalue1; else { int lower = ivalue1; while (update->ntimestep >= ivalue3*lower) lower *= ivalue3; int multiple = update->ntimestep/lower; if (multiple < ivalue2) arg = (multiple+1)*lower; else arg = lower*ivalue3; } return arg; } if (tree->type == STRIDE) { int ivalue1 = static_cast (eval_tree(tree->left,i)); int ivalue2 = static_cast (eval_tree(tree->middle,i)); int ivalue3 = static_cast (eval_tree(tree->right,i)); if (ivalue1 < 0 || ivalue2 < 0 || ivalue3 <= 0 || ivalue1 > ivalue2) error->one(FLERR,"Invalid math function in variable formula"); if (update->ntimestep < ivalue1) arg = ivalue1; else if (update->ntimestep < ivalue2) { int offset = update->ntimestep - ivalue1; arg = ivalue1 + (offset/ivalue3)*ivalue3 + ivalue3; if (arg > ivalue2) arg = 9.0e18; } else arg = 9.0e18; return arg; } if (tree->type == VDISPLACE) { arg1 = eval_tree(tree->left,i); arg2 = eval_tree(tree->right,i); double delta = update->ntimestep - update->beginstep; arg = arg1 + arg2*delta*update->dt; return arg; } if (tree->type == SWIGGLE) { arg1 = eval_tree(tree->left,i); arg2 = eval_tree(tree->middle,i); arg3 = eval_tree(tree->right,i); if (arg3 == 0.0) error->one(FLERR,"Invalid math function in variable formula"); double delta = update->ntimestep - update->beginstep; double omega = 2.0*MY_PI/arg3; arg = arg1 + arg2*sin(omega*delta*update->dt); return arg; } if (tree->type == CWIGGLE) { arg1 = eval_tree(tree->left,i); arg2 = eval_tree(tree->middle,i); arg3 = eval_tree(tree->right,i); if (arg3 == 0.0) error->one(FLERR,"Invalid math function in variable formula"); double delta = update->ntimestep - update->beginstep; double omega = 2.0*MY_PI/arg3; arg = arg1 + arg2*(1.0-cos(omega*delta*update->dt)); return arg; } if (tree->type == GMASK) { if (atom->mask[i] & tree->ivalue1) return 1.0; else return 0.0; } if (tree->type == RMASK) { if (domain->regions[tree->ivalue1]->match(atom->x[i][0], atom->x[i][1], atom->x[i][2])) return 1.0; else return 0.0; } if (tree->type == GRMASK) { if ((atom->mask[i] & tree->ivalue1) && (domain->regions[tree->ivalue2]->match(atom->x[i][0], atom->x[i][1], atom->x[i][2]))) return 1.0; else return 0.0; } return 0.0; } /* ---------------------------------------------------------------------- */ void Variable::free_tree(Tree *tree) { if (tree->left) free_tree(tree->left); if (tree->middle) free_tree(tree->middle); if (tree->right) free_tree(tree->right); if (tree->type == ATOMARRAY && tree->selfalloc) memory->destroy(tree->array); delete tree; } /* ---------------------------------------------------------------------- find matching parenthesis in str, allocate contents = str between parens i = left paren return loc or right paren ------------------------------------------------------------------------- */ int Variable::find_matching_paren(char *str, int i,char *&contents) { // istop = matching ')' at same level, allowing for nested parens int istart = i; int ilevel = 0; while (1) { i++; if (!str[i]) break; if (str[i] == '(') ilevel++; else if (str[i] == ')' && ilevel) ilevel--; else if (str[i] == ')') break; } if (!str[i]) error->all(FLERR,"Invalid syntax in variable formula"); int istop = i; int n = istop - istart - 1; contents = new char[n+1]; strncpy(contents,&str[istart+1],n); contents[n] = '\0'; return istop; } /* ---------------------------------------------------------------------- find int between brackets and return it ptr initially points to left bracket return it pointing to right bracket error if no right bracket or brackets are empty error if any between-bracket chars are non-digits or value == 0 ------------------------------------------------------------------------- */ int Variable::int_between_brackets(char *&ptr) { char *start = ++ptr; while (*ptr && *ptr != ']') { if (!isdigit(*ptr)) error->all(FLERR,"Non digit character between brackets in variable"); ptr++; } if (*ptr != ']') error->all(FLERR,"Mismatched brackets in variable"); if (ptr == start) error->all(FLERR,"Empty brackets in variable"); *ptr = '\0'; int index = atoi(start); *ptr = ']'; if (index == 0) error->all(FLERR,"Index between variable brackets must be positive"); return index; } /* ---------------------------------------------------------------------- process a math function in formula push result onto tree or arg stack word = math function contents = str between parentheses with one,two,three args return 0 if not a match, 1 if successfully processed customize by adding a math function: sqrt(),exp(),ln(),log(),abs(),sin(),cos(),tan(),asin(),acos(),atan(), atan2(y,x),random(x,y,z),normal(x,y,z),ceil(),floor(),round(), ramp(x,y),stagger(x,y),logfreq(x,y,z),stride(x,y,z), vdisplace(x,y),swiggle(x,y,z),cwiggle(x,y,z) ------------------------------------------------------------------------- */ int Variable::math_function(char *word, char *contents, Tree **tree, Tree **treestack, int &ntreestack, double *argstack, int &nargstack) { // word not a match to any math function if (strcmp(word,"sqrt") && strcmp(word,"exp") && strcmp(word,"ln") && strcmp(word,"log") && strcmp(word,"abs") && strcmp(word,"sin") && strcmp(word,"cos") && strcmp(word,"tan") && strcmp(word,"asin") && strcmp(word,"acos") && strcmp(word,"atan") && strcmp(word,"atan2") && strcmp(word,"random") && strcmp(word,"normal") && strcmp(word,"ceil") && strcmp(word,"floor") && strcmp(word,"round") && strcmp(word,"ramp") && strcmp(word,"stagger") && strcmp(word,"logfreq") && strcmp(word,"stride") && strcmp(word,"vdisplace") && strcmp(word,"swiggle") && strcmp(word,"cwiggle")) return 0; // parse contents for arg1,arg2,arg3 separated by commas // ptr1,ptr2 = location of 1st and 2nd comma, NULL if none char *arg1,*arg2,*arg3; char *ptr1,*ptr2; ptr1 = find_next_comma(contents); if (ptr1) { *ptr1 = '\0'; ptr2 = find_next_comma(ptr1+1); if (ptr2) *ptr2 = '\0'; } else ptr2 = NULL; int n = strlen(contents) + 1; arg1 = new char[n]; strcpy(arg1,contents); int narg = 1; if (ptr1) { n = strlen(ptr1+1) + 1; arg2 = new char[n]; strcpy(arg2,ptr1+1); narg = 2; } else arg2 = NULL; if (ptr2) { n = strlen(ptr2+1) + 1; arg3 = new char[n]; strcpy(arg3,ptr2+1); narg = 3; } else arg3 = NULL; // evaluate args Tree *newtree; double value1,value2,value3; if (tree) { newtree = new Tree(); Tree *argtree; if (narg == 1) { evaluate(arg1,&argtree); newtree->left = argtree; newtree->middle = newtree->right = NULL; } else if (narg == 2) { evaluate(arg1,&argtree); newtree->left = argtree; newtree->middle = NULL; evaluate(arg2,&argtree); newtree->right = argtree; } else if (narg == 3) { evaluate(arg1,&argtree); newtree->left = argtree; evaluate(arg2,&argtree); newtree->middle = argtree; evaluate(arg3,&argtree); newtree->right = argtree; } treestack[ntreestack++] = newtree; } else { if (narg == 1) { value1 = evaluate(arg1,NULL); } else if (narg == 2) { value1 = evaluate(arg1,NULL); value2 = evaluate(arg2,NULL); } else if (narg == 3) { value1 = evaluate(arg1,NULL); value2 = evaluate(arg2,NULL); value3 = evaluate(arg3,NULL); } } if (strcmp(word,"sqrt") == 0) { if (narg != 1) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = SQRT; else { if (value1 < 0.0) error->all(FLERR,"Sqrt of negative value in variable formula"); argstack[nargstack++] = sqrt(value1); } } else if (strcmp(word,"exp") == 0) { if (narg != 1) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = EXP; else argstack[nargstack++] = exp(value1); } else if (strcmp(word,"ln") == 0) { if (narg != 1) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = LN; else { if (value1 <= 0.0) error->all(FLERR,"Log of zero/negative value in variable formula"); argstack[nargstack++] = log(value1); } } else if (strcmp(word,"log") == 0) { if (narg != 1) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = LOG; else { if (value1 <= 0.0) error->all(FLERR,"Log of zero/negative value in variable formula"); argstack[nargstack++] = log10(value1); } } else if (strcmp(word,"abs") == 0) { if (narg != 1) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = ABS; else argstack[nargstack++] = fabs(value1); } else if (strcmp(word,"sin") == 0) { if (narg != 1) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = SIN; else argstack[nargstack++] = sin(value1); } else if (strcmp(word,"cos") == 0) { if (narg != 1) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = COS; else argstack[nargstack++] = cos(value1); } else if (strcmp(word,"tan") == 0) { if (narg != 1) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = TAN; else argstack[nargstack++] = tan(value1); } else if (strcmp(word,"asin") == 0) { if (narg != 1) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = ASIN; else { if (value1 < -1.0 || value1 > 1.0) error->all(FLERR,"Arcsin of invalid value in variable formula"); argstack[nargstack++] = asin(value1); } } else if (strcmp(word,"acos") == 0) { if (narg != 1) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = ACOS; else { if (value1 < -1.0 || value1 > 1.0) error->all(FLERR,"Arccos of invalid value in variable formula"); argstack[nargstack++] = acos(value1); } } else if (strcmp(word,"atan") == 0) { if (narg != 1) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = ATAN; else argstack[nargstack++] = atan(value1); } else if (strcmp(word,"atan2") == 0) { if (narg != 2) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = ATAN2; else argstack[nargstack++] = atan2(value1,value2); } else if (strcmp(word,"random") == 0) { if (narg != 3) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = RANDOM; else { if (randomequal == NULL) { int seed = static_cast (value3); if (seed <= 0) error->all(FLERR,"Invalid math function in variable formula"); randomequal = new RanMars(lmp,seed); } argstack[nargstack++] = randomequal->uniform()*(value2-value1) + value1; } } else if (strcmp(word,"normal") == 0) { if (narg != 3) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = NORMAL; else { if (value2 < 0.0) error->all(FLERR,"Invalid math function in variable formula"); if (randomequal == NULL) { int seed = static_cast (value3); if (seed <= 0) error->all(FLERR,"Invalid math function in variable formula"); randomequal = new RanMars(lmp,seed); } argstack[nargstack++] = value1 + value2*randomequal->gaussian(); } } else if (strcmp(word,"ceil") == 0) { if (narg != 1) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = CEIL; else argstack[nargstack++] = ceil(value1); } else if (strcmp(word,"floor") == 0) { if (narg != 1) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = FLOOR; else argstack[nargstack++] = floor(value1); } else if (strcmp(word,"round") == 0) { if (narg != 1) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = ROUND; else argstack[nargstack++] = MYROUND(value1); } else if (strcmp(word,"ramp") == 0) { if (narg != 2) error->all(FLERR,"Invalid math function in variable formula"); if (update->whichflag == 0) error->all(FLERR,"Cannot use ramp in variable formula between runs"); if (tree) newtree->type = RAMP; else { double delta = update->ntimestep - update->beginstep; if (delta != 0.0) delta /= update->endstep - update->beginstep; double value = value1 + delta*(value2-value1); argstack[nargstack++] = value; } } else if (strcmp(word,"stagger") == 0) { if (narg != 2) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = STAGGER; else { int ivalue1 = static_cast (value1); int ivalue2 = static_cast (value2); if (ivalue1 <= 0 || ivalue2 <= 0 || ivalue1 <= ivalue2) error->all(FLERR,"Invalid math function in variable formula"); int lower = update->ntimestep/ivalue1 * ivalue1; int delta = update->ntimestep - lower; double value; if (delta < ivalue2) value = lower+ivalue2; else value = lower+ivalue1; argstack[nargstack++] = value; } } else if (strcmp(word,"logfreq") == 0) { if (narg != 3) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = LOGFREQ; else { int ivalue1 = static_cast (value1); int ivalue2 = static_cast (value2); int ivalue3 = static_cast (value3); if (ivalue1 <= 0 || ivalue2 <= 0 || ivalue3 <= 0 || ivalue2 >= ivalue3) error->all(FLERR,"Invalid math function in variable formula"); double value; if (update->ntimestep < ivalue1) value = ivalue1; else { int lower = ivalue1; while (update->ntimestep >= ivalue3*lower) lower *= ivalue3; int multiple = update->ntimestep/lower; if (multiple < ivalue2) value = (multiple+1)*lower; else value = lower*ivalue3; } argstack[nargstack++] = value; } } else if (strcmp(word,"stride") == 0) { if (narg != 3) error->all(FLERR,"Invalid math function in variable formula"); if (tree) newtree->type = STRIDE; else { int ivalue1 = static_cast (value1); int ivalue2 = static_cast (value2); int ivalue3 = static_cast (value3); if (ivalue1 < 0 || ivalue2 < 0 || ivalue3 <= 0 || ivalue1 > ivalue2) error->one(FLERR,"Invalid math function in variable formula"); double value; if (update->ntimestep < ivalue1) value = ivalue1; else if (update->ntimestep < ivalue2) { int offset = update->ntimestep - ivalue1; value = ivalue1 + (offset/ivalue3)*ivalue3 + ivalue3; if (value > ivalue2) value = 9.0e18; } else value = 9.0e18; argstack[nargstack++] = value; } } else if (strcmp(word,"vdisplace") == 0) { if (narg != 2) error->all(FLERR,"Invalid math function in variable formula"); if (update->whichflag == 0) error->all(FLERR,"Cannot use vdisplace in variable formula between runs"); if (tree) newtree->type = VDISPLACE; else { double delta = update->ntimestep - update->beginstep; double value = value1 + value2*delta*update->dt; argstack[nargstack++] = value; } } else if (strcmp(word,"swiggle") == 0) { if (narg != 3) error->all(FLERR,"Invalid math function in variable formula"); if (update->whichflag == 0) error->all(FLERR,"Cannot use swiggle in variable formula between runs"); if (tree) newtree->type = CWIGGLE; else { if (value3 == 0.0) error->all(FLERR,"Invalid math function in variable formula"); double delta = update->ntimestep - update->beginstep; double omega = 2.0*MY_PI/value3; double value = value1 + value2*sin(omega*delta*update->dt); argstack[nargstack++] = value; } } else if (strcmp(word,"cwiggle") == 0) { if (narg != 3) error->all(FLERR,"Invalid math function in variable formula"); if (update->whichflag == 0) error->all(FLERR,"Cannot use cwiggle in variable formula between runs"); if (tree) newtree->type = CWIGGLE; else { if (value3 == 0.0) error->all(FLERR,"Invalid math function in variable formula"); double delta = update->ntimestep - update->beginstep; double omega = 2.0*MY_PI/value3; double value = value1 + value2*(1.0-cos(omega*delta*update->dt)); argstack[nargstack++] = value; } } delete [] arg1; delete [] arg2; delete [] arg3; return 1; } /* ---------------------------------------------------------------------- process a group function in formula with optional region arg push result onto tree or arg stack word = group function contents = str between parentheses with one,two,three args return 0 if not a match, 1 if successfully processed customize by adding a group function with optional region arg: count(group),mass(group),charge(group), xcm(group,dim),vcm(group,dim),fcm(group,dim), bound(group,xmin),gyration(group),ke(group),angmom(group,dim), torque(group,dim),inertia(group,dim),omega(group,dim) ------------------------------------------------------------------------- */ int Variable::group_function(char *word, char *contents, Tree **tree, Tree **treestack, int &ntreestack, double *argstack, int &nargstack) { // word not a match to any group function if (strcmp(word,"count") && strcmp(word,"mass") && strcmp(word,"charge") && strcmp(word,"xcm") && strcmp(word,"vcm") && strcmp(word,"fcm") && strcmp(word,"bound") && strcmp(word,"gyration") && strcmp(word,"ke") && strcmp(word,"angmom") && strcmp(word,"torque") && strcmp(word,"inertia") && strcmp(word,"omega")) return 0; // parse contents for arg1,arg2,arg3 separated by commas // ptr1,ptr2 = location of 1st and 2nd comma, NULL if none char *arg1,*arg2,*arg3; char *ptr1,*ptr2; ptr1 = find_next_comma(contents); if (ptr1) { *ptr1 = '\0'; ptr2 = find_next_comma(ptr1+1); if (ptr2) *ptr2 = '\0'; } else ptr2 = NULL; int n = strlen(contents) + 1; arg1 = new char[n]; strcpy(arg1,contents); int narg = 1; if (ptr1) { n = strlen(ptr1+1) + 1; arg2 = new char[n]; strcpy(arg2,ptr1+1); narg = 2; } else arg2 = NULL; if (ptr2) { n = strlen(ptr2+1) + 1; arg3 = new char[n]; strcpy(arg3,ptr2+1); narg = 3; } else arg3 = NULL; // group to operate on int igroup = group->find(arg1); if (igroup == -1) error->all(FLERR,"Group ID in variable formula does not exist"); // match word to group function double value; if (strcmp(word,"count") == 0) { if (narg == 1) value = group->count(igroup); else if (narg == 2) value = group->count(igroup,region_function(arg2)); else error->all(FLERR,"Invalid group function in variable formula"); } else if (strcmp(word,"mass") == 0) { if (narg == 1) value = group->mass(igroup); else if (narg == 2) value = group->mass(igroup,region_function(arg2)); else error->all(FLERR,"Invalid group function in variable formula"); } else if (strcmp(word,"charge") == 0) { if (narg == 1) value = group->charge(igroup); else if (narg == 2) value = group->charge(igroup,region_function(arg2)); else error->all(FLERR,"Invalid group function in variable formula"); } else if (strcmp(word,"xcm") == 0) { atom->check_mass(); double xcm[3]; if (narg == 2) { double masstotal = group->mass(igroup); group->xcm(igroup,masstotal,xcm); } else if (narg == 3) { int iregion = region_function(arg3); double masstotal = group->mass(igroup,iregion); group->xcm(igroup,masstotal,xcm,iregion); } else error->all(FLERR,"Invalid group function in variable formula"); if (strcmp(arg2,"x") == 0) value = xcm[0]; else if (strcmp(arg2,"y") == 0) value = xcm[1]; else if (strcmp(arg2,"z") == 0) value = xcm[2]; else error->all(FLERR,"Invalid group function in variable formula"); } else if (strcmp(word,"vcm") == 0) { atom->check_mass(); double vcm[3]; if (narg == 2) { double masstotal = group->mass(igroup); group->vcm(igroup,masstotal,vcm); } else if (narg == 3) { int iregion = region_function(arg3); double masstotal = group->mass(igroup,iregion); group->vcm(igroup,masstotal,vcm,iregion); } else error->all(FLERR,"Invalid group function in variable formula"); if (strcmp(arg2,"x") == 0) value = vcm[0]; else if (strcmp(arg2,"y") == 0) value = vcm[1]; else if (strcmp(arg2,"z") == 0) value = vcm[2]; else error->all(FLERR,"Invalid group function in variable formula"); } else if (strcmp(word,"fcm") == 0) { double fcm[3]; if (narg == 2) group->fcm(igroup,fcm); else if (narg == 3) group->fcm(igroup,fcm,region_function(arg3)); else error->all(FLERR,"Invalid group function in variable formula"); if (strcmp(arg2,"x") == 0) value = fcm[0]; else if (strcmp(arg2,"y") == 0) value = fcm[1]; else if (strcmp(arg2,"z") == 0) value = fcm[2]; else error->all(FLERR,"Invalid group function in variable formula"); } else if (strcmp(word,"bound") == 0) { double minmax[6]; if (narg == 2) group->bounds(igroup,minmax); else if (narg == 3) group->bounds(igroup,minmax,region_function(arg3)); else error->all(FLERR,"Invalid group function in variable formula"); if (strcmp(arg2,"xmin") == 0) value = minmax[0]; else if (strcmp(arg2,"xmax") == 0) value = minmax[1]; else if (strcmp(arg2,"ymin") == 0) value = minmax[2]; else if (strcmp(arg2,"ymax") == 0) value = minmax[3]; else if (strcmp(arg2,"zmin") == 0) value = minmax[4]; else if (strcmp(arg2,"zmax") == 0) value = minmax[5]; else error->all(FLERR,"Invalid group function in variable formula"); } else if (strcmp(word,"gyration") == 0) { atom->check_mass(); double xcm[3]; if (narg == 1) { double masstotal = group->mass(igroup); group->xcm(igroup,masstotal,xcm); value = group->gyration(igroup,masstotal,xcm); } else if (narg == 2) { int iregion = region_function(arg2); double masstotal = group->mass(igroup,iregion); group->xcm(igroup,masstotal,xcm,iregion); value = group->gyration(igroup,masstotal,xcm,iregion); } else error->all(FLERR,"Invalid group function in variable formula"); } else if (strcmp(word,"ke") == 0) { if (narg == 1) value = group->ke(igroup); else if (narg == 2) value = group->ke(igroup,region_function(arg2)); else error->all(FLERR,"Invalid group function in variable formula"); } else if (strcmp(word,"angmom") == 0) { atom->check_mass(); double xcm[3],lmom[3]; if (narg == 2) { double masstotal = group->mass(igroup); group->xcm(igroup,masstotal,xcm); group->angmom(igroup,xcm,lmom); } else if (narg == 3) { int iregion = region_function(arg3); double masstotal = group->mass(igroup,iregion); group->xcm(igroup,masstotal,xcm,iregion); group->angmom(igroup,xcm,lmom,iregion); } else error->all(FLERR,"Invalid group function in variable formula"); if (strcmp(arg2,"x") == 0) value = lmom[0]; else if (strcmp(arg2,"y") == 0) value = lmom[1]; else if (strcmp(arg2,"z") == 0) value = lmom[2]; else error->all(FLERR,"Invalid group function in variable formula"); } else if (strcmp(word,"torque") == 0) { atom->check_mass(); double xcm[3],tq[3]; if (narg == 2) { double masstotal = group->mass(igroup); group->xcm(igroup,masstotal,xcm); group->torque(igroup,xcm,tq); } else if (narg == 3) { int iregion = region_function(arg3); double masstotal = group->mass(igroup,iregion); group->xcm(igroup,masstotal,xcm,iregion); group->torque(igroup,xcm,tq,iregion); } else error->all(FLERR,"Invalid group function in variable formula"); if (strcmp(arg2,"x") == 0) value = tq[0]; else if (strcmp(arg2,"y") == 0) value = tq[1]; else if (strcmp(arg2,"z") == 0) value = tq[2]; else error->all(FLERR,"Invalid group function in variable formula"); } else if (strcmp(word,"inertia") == 0) { atom->check_mass(); double xcm[3],inertia[3][3]; if (narg == 2) { double masstotal = group->mass(igroup); group->xcm(igroup,masstotal,xcm); group->inertia(igroup,xcm,inertia); } else if (narg == 3) { int iregion = region_function(arg3); double masstotal = group->mass(igroup,iregion); group->xcm(igroup,masstotal,xcm,iregion); group->inertia(igroup,xcm,inertia,iregion); } else error->all(FLERR,"Invalid group function in variable formula"); if (strcmp(arg2,"xx") == 0) value = inertia[0][0]; else if (strcmp(arg2,"yy") == 0) value = inertia[1][1]; else if (strcmp(arg2,"zz") == 0) value = inertia[2][2]; else if (strcmp(arg2,"xy") == 0) value = inertia[0][1]; else if (strcmp(arg2,"yz") == 0) value = inertia[1][2]; else if (strcmp(arg2,"xz") == 0) value = inertia[0][2]; else error->all(FLERR,"Invalid group function in variable formula"); } else if (strcmp(word,"omega") == 0) { atom->check_mass(); double xcm[3],angmom[3],inertia[3][3],omega[3]; if (narg == 2) { double masstotal = group->mass(igroup); group->xcm(igroup,masstotal,xcm); group->angmom(igroup,xcm,angmom); group->inertia(igroup,xcm,inertia); group->omega(angmom,inertia,omega); } else if (narg == 3) { int iregion = region_function(arg3); double masstotal = group->mass(igroup,iregion); group->xcm(igroup,masstotal,xcm,iregion); group->angmom(igroup,xcm,angmom,iregion); group->inertia(igroup,xcm,inertia,iregion); group->omega(angmom,inertia,omega); } else error->all(FLERR,"Invalid group function in variable formula"); if (strcmp(arg2,"x") == 0) value = omega[0]; else if (strcmp(arg2,"y") == 0) value = omega[1]; else if (strcmp(arg2,"z") == 0) value = omega[2]; else error->all(FLERR,"Invalid group function in variable formula"); } delete [] arg1; delete [] arg2; delete [] arg3; // save value in tree or on argstack if (tree) { Tree *newtree = new Tree(); newtree->type = VALUE; newtree->value = value; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else argstack[nargstack++] = value; return 1; } /* ---------------------------------------------------------------------- */ int Variable::region_function(char *id) { int iregion = domain->find_region(id); if (iregion == -1) error->all(FLERR,"Region ID in variable formula does not exist"); // init region in case sub-regions have been deleted domain->regions[iregion]->init(); return iregion; } /* ---------------------------------------------------------------------- process a special function in formula push result onto tree or arg stack word = special function contents = str between parentheses with one,two,three args return 0 if not a match, 1 if successfully processed customize by adding a special function: sum(x),min(x),max(x),ave(x),trap(x),slope(x), gmask(x),rmask(x),grmask(x,y),next(x) ------------------------------------------------------------------------- */ int Variable::special_function(char *word, char *contents, Tree **tree, Tree **treestack, int &ntreestack, double *argstack, int &nargstack) { double value,xvalue,sx,sy,sxx,sxy; // word not a match to any special function if (strcmp(word,"sum") && strcmp(word,"min") && strcmp(word,"max") && strcmp(word,"ave") && strcmp(word,"trap") && strcmp(word,"slope") && strcmp(word,"gmask") && strcmp(word,"rmask") && strcmp(word,"grmask") && strcmp(word,"next")) return 0; // parse contents for arg1,arg2,arg3 separated by commas // ptr1,ptr2 = location of 1st and 2nd comma, NULL if none char *arg1,*arg2,*arg3; char *ptr1,*ptr2; ptr1 = find_next_comma(contents); if (ptr1) { *ptr1 = '\0'; ptr2 = find_next_comma(ptr1+1); if (ptr2) *ptr2 = '\0'; } else ptr2 = NULL; int n = strlen(contents) + 1; arg1 = new char[n]; strcpy(arg1,contents); int narg = 1; if (ptr1) { n = strlen(ptr1+1) + 1; arg2 = new char[n]; strcpy(arg2,ptr1+1); narg = 2; } else arg2 = NULL; if (ptr2) { n = strlen(ptr2+1) + 1; arg3 = new char[n]; strcpy(arg3,ptr2+1); narg = 3; } else arg3 = NULL; // special functions that operate on global vectors if (strcmp(word,"sum") == 0 || strcmp(word,"min") == 0 || strcmp(word,"max") == 0 || strcmp(word,"ave") == 0 || strcmp(word,"trap") == 0 || strcmp(word,"slope") == 0) { int method; if (strcmp(word,"sum") == 0) method = SUM; else if (strcmp(word,"min") == 0) method = XMIN; else if (strcmp(word,"max") == 0) method = XMAX; else if (strcmp(word,"ave") == 0) method = AVE; else if (strcmp(word,"trap") == 0) method = TRAP; else if (strcmp(word,"slope") == 0) method = SLOPE; if (narg != 1) error->all(FLERR,"Invalid special function in variable formula"); Compute *compute = NULL; Fix *fix = NULL; int index,nvec,nstride; if (strstr(arg1,"c_") == arg1) { ptr1 = strchr(arg1,'['); if (ptr1) { ptr2 = ptr1; index = int_between_brackets(ptr2); *ptr1 = '\0'; } else index = 0; int icompute = modify->find_compute(&arg1[2]); if (icompute < 0) error->all(FLERR,"Invalid compute ID in variable formula"); compute = modify->compute[icompute]; if (index == 0 && compute->vector_flag) { if (update->whichflag == 0) { if (compute->invoked_vector != update->ntimestep) error->all(FLERR, "Compute used in variable between runs is not current"); } else if (!(compute->invoked_flag & INVOKED_VECTOR)) { compute->compute_vector(); compute->invoked_flag |= INVOKED_VECTOR; } nvec = compute->size_vector; nstride = 1; } else if (index && compute->array_flag) { if (index > compute->size_array_cols) error->all(FLERR,"Variable formula compute array " "is accessed out-of-range"); if (update->whichflag == 0) { if (compute->invoked_array != update->ntimestep) error->all(FLERR, "Compute used in variable between runs is not current"); } else if (!(compute->invoked_flag & INVOKED_ARRAY)) { compute->compute_array(); compute->invoked_flag |= INVOKED_ARRAY; } nvec = compute->size_array_rows; nstride = compute->size_array_cols; } else error->all(FLERR,"Mismatched compute in variable formula"); } else if (strstr(arg1,"f_") == arg1) { ptr1 = strchr(arg1,'['); if (ptr1) { ptr2 = ptr1; index = int_between_brackets(ptr2); *ptr1 = '\0'; } else index = 0; int ifix = modify->find_fix(&arg1[2]); if (ifix < 0) error->all(FLERR,"Invalid fix ID in variable formula"); fix = modify->fix[ifix]; if (index == 0 && fix->vector_flag) { if (update->whichflag > 0 && update->ntimestep % fix->global_freq) error->all(FLERR,"Fix in variable not computed at compatible time"); nvec = fix->size_vector; nstride = 1; } else if (index && fix->array_flag) { if (index > fix->size_array_cols) error->all(FLERR, "Variable formula fix array is accessed out-of-range"); if (update->whichflag > 0 && update->ntimestep % fix->global_freq) error->all(FLERR,"Fix in variable not computed at compatible time"); nvec = fix->size_array_rows; nstride = fix->size_array_cols; } else error->all(FLERR,"Mismatched fix in variable formula"); } else error->all(FLERR,"Invalid special function in variable formula"); value = 0.0; if (method == SLOPE) sx = sy = sxx = sxy = 0.0; if (method == XMIN) value = BIG; if (method == XMAX) value = -BIG; if (compute) { double *vec; if (index) { if (compute->array) vec = &compute->array[0][index-1]; else vec = NULL; } else vec = compute->vector; int j = 0; for (int i = 0; i < nvec; i++) { if (method == SUM) value += vec[j]; else if (method == XMIN) value = MIN(value,vec[j]); else if (method == XMAX) value = MAX(value,vec[j]); else if (method == AVE) value += vec[j]; else if (method == TRAP) value += vec[j]; else if (method == SLOPE) { if (nvec > 1) xvalue = (double) i / (nvec-1); else xvalue = 0.0; sx += xvalue; sy += vec[j]; sxx += xvalue*xvalue; sxy += xvalue*vec[j]; } j += nstride; } if (method == TRAP) value -= 0.5*vec[0] + 0.5*vec[nvec-1]; } if (fix) { double one; for (int i = 0; i < nvec; i++) { if (index) one = fix->compute_array(i,index-1); else one = fix->compute_vector(i); if (method == SUM) value += one; else if (method == XMIN) value = MIN(value,one); else if (method == XMAX) value = MAX(value,one); else if (method == AVE) value += one; else if (method == TRAP) value += one; else if (method == SLOPE) { if (nvec > 1) xvalue = (double) i / (nvec-1); else xvalue = 0.0; sx += xvalue; sy += one; sxx += xvalue*xvalue; sxy += xvalue*one; } } if (method == TRAP) { if (index) value -= 0.5*fix->compute_array(0,index-1) + 0.5*fix->compute_array(nvec-1,index-1); else value -= 0.5*fix->compute_vector(0) + 0.5*fix->compute_vector(nvec-1); } } if (method == AVE) value /= nvec; if (method == SLOPE) { double numerator = sxy - sx*sy; double denominator = sxx - sx*sx; if (denominator != 0.0) value = numerator/denominator / nvec; else value = BIG; } // save value in tree or on argstack if (tree) { Tree *newtree = new Tree(); newtree->type = VALUE; newtree->value = value; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else argstack[nargstack++] = value; // mask special functions } else if (strcmp(word,"gmask") == 0) { if (tree == NULL) error->all(FLERR,"Gmask function in equal-style variable formula"); if (narg != 1) error->all(FLERR,"Invalid special function in variable formula"); int igroup = group->find(arg1); if (igroup == -1) error->all(FLERR,"Group ID in variable formula does not exist"); Tree *newtree = new Tree(); newtree->type = GMASK; newtree->ivalue1 = group->bitmask[igroup]; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else if (strcmp(word,"rmask") == 0) { if (tree == NULL) error->all(FLERR,"Rmask function in equal-style variable formula"); if (narg != 1) error->all(FLERR,"Invalid special function in variable formula"); int iregion = region_function(arg1); Tree *newtree = new Tree(); newtree->type = RMASK; newtree->ivalue1 = iregion; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else if (strcmp(word,"grmask") == 0) { if (tree == NULL) error->all(FLERR,"Grmask function in equal-style variable formula"); if (narg != 2) error->all(FLERR,"Invalid special function in variable formula"); int igroup = group->find(arg1); if (igroup == -1) error->all(FLERR,"Group ID in variable formula does not exist"); int iregion = region_function(arg2); Tree *newtree = new Tree(); newtree->type = GRMASK; newtree->ivalue1 = group->bitmask[igroup]; newtree->ivalue2 = iregion; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; // special function for file-style or atomfile-style variables } else if (strcmp(word,"next") == 0) { if (narg != 1) error->all(FLERR,"Invalid special function in variable formula"); int ivar = find(arg1); if (ivar == -1) error->all(FLERR,"Variable ID in variable formula does not exist"); // SCALARFILE has single current value, read next one // save value in tree or on argstack if (style[ivar] == SCALARFILE) { double value = atof(data[ivar][0]); int done = reader[ivar]->read_scalar(data[ivar][0]); if (done) remove(ivar); if (tree) { Tree *newtree = new Tree(); newtree->type = VALUE; newtree->value = value; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else argstack[nargstack++] = value; // ATOMFILE has per-atom values, save values in tree // copy current per-atom values into result so can read next ones // set selfalloc = 1 so result will be deleted by free_tree() after eval } else if (style[ivar] == ATOMFILE) { if (tree == NULL) error->all(FLERR,"Atomfile variable in equal-style variable formula"); double *result; memory->create(result,atom->nlocal,"variable:result"); memcpy(result,reader[ivar]->fix->vstore,atom->nlocal*sizeof(double)); int done = reader[ivar]->read_peratom(); if (done) remove(ivar); Tree *newtree = new Tree(); newtree->type = ATOMARRAY; newtree->array = result; newtree->nstride = 1; newtree->selfalloc = 1; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else error->all(FLERR,"Invalid variable style in special function next"); } delete [] arg1; delete [] arg2; delete [] arg3; return 1; } /* ---------------------------------------------------------------------- extract a global value from a per-atom quantity in a formula flag = 0 -> word is an atom vector flag = 1 -> vector is a per-atom compute or fix quantity with nstride id = positive global ID of atom, converted to local index push result onto tree or arg stack customize by adding an atom vector: id,mass,type,mol,x,y,z,vx,vy,vz,fx,fy,fz ------------------------------------------------------------------------- */ void Variable::peratom2global(int flag, char *word, double *vector, int nstride, int id, Tree **tree, Tree **treestack, int &ntreestack, double *argstack, int &nargstack) { if (atom->map_style == 0) error->all(FLERR, "Indexed per-atom vector in variable formula without atom map"); int index = atom->map(id); double mine; if (index >= 0 && index < atom->nlocal) { if (flag == 0) { if (strcmp(word,"id") == 0) mine = atom->tag[index]; else if (strcmp(word,"mass") == 0) { if (atom->rmass) mine = atom->rmass[index]; else mine = atom->mass[atom->type[index]]; } else if (strcmp(word,"type") == 0) mine = atom->type[index]; else if (strcmp(word,"mol") == 0) { if (!atom->molecule_flag) error->one(FLERR,"Variable uses atom property that isn't allocated"); mine = atom->molecule[index]; } else if (strcmp(word,"x") == 0) mine = atom->x[index][0]; else if (strcmp(word,"y") == 0) mine = atom->x[index][1]; else if (strcmp(word,"z") == 0) mine = atom->x[index][2]; else if (strcmp(word,"vx") == 0) mine = atom->v[index][0]; else if (strcmp(word,"vy") == 0) mine = atom->v[index][1]; else if (strcmp(word,"vz") == 0) mine = atom->v[index][2]; else if (strcmp(word,"fx") == 0) mine = atom->f[index][0]; else if (strcmp(word,"fy") == 0) mine = atom->f[index][1]; else if (strcmp(word,"fz") == 0) mine = atom->f[index][2]; else error->one(FLERR,"Invalid atom vector in variable formula"); } else mine = vector[index*nstride]; } else mine = 0.0; double value; MPI_Allreduce(&mine,&value,1,MPI_DOUBLE,MPI_SUM,world); if (tree) { Tree *newtree = new Tree(); newtree->type = VALUE; newtree->value = value; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; } else argstack[nargstack++] = value; } /* ---------------------------------------------------------------------- check if word matches an atom vector return 1 if yes, else 0 customize by adding an atom vector: id,mass,type,mol,x,y,z,vx,vy,vz,fx,fy,fz ------------------------------------------------------------------------- */ int Variable::is_atom_vector(char *word) { if (strcmp(word,"id") == 0) return 1; if (strcmp(word,"mass") == 0) return 1; if (strcmp(word,"type") == 0) return 1; if (strcmp(word,"mol") == 0) return 1; if (strcmp(word,"x") == 0) return 1; if (strcmp(word,"y") == 0) return 1; if (strcmp(word,"z") == 0) return 1; if (strcmp(word,"vx") == 0) return 1; if (strcmp(word,"vy") == 0) return 1; if (strcmp(word,"vz") == 0) return 1; if (strcmp(word,"fx") == 0) return 1; if (strcmp(word,"fy") == 0) return 1; if (strcmp(word,"fz") == 0) return 1; return 0; } /* ---------------------------------------------------------------------- process an atom vector in formula push result onto tree word = atom vector customize by adding an atom vector: id,mass,type,mol,x,y,z,vx,vy,vz,fx,fy,fz ------------------------------------------------------------------------- */ void Variable::atom_vector(char *word, Tree **tree, Tree **treestack, int &ntreestack) { if (tree == NULL) error->all(FLERR,"Atom vector in equal-style variable formula"); Tree *newtree = new Tree(); newtree->type = ATOMARRAY; newtree->nstride = 3; newtree->selfalloc = 0; newtree->left = newtree->middle = newtree->right = NULL; treestack[ntreestack++] = newtree; if (strcmp(word,"id") == 0) { if (sizeof(tagint) == sizeof(smallint)) { newtree->type = INTARRAY; newtree->iarray = (int *) atom->tag; } else { newtree->type = BIGINTARRAY; newtree->barray = (bigint *) atom->tag; } newtree->nstride = 1; } else if (strcmp(word,"mass") == 0) { if (atom->rmass) { newtree->nstride = 1; newtree->array = atom->rmass; } else { newtree->type = TYPEARRAY; newtree->array = atom->mass; } } else if (strcmp(word,"type") == 0) { newtree->type = INTARRAY; newtree->nstride = 1; newtree->iarray = atom->type; } else if (strcmp(word,"mol") == 0) { if (!atom->molecule_flag) error->one(FLERR,"Variable uses atom property that isn't allocated"); if (sizeof(tagint) == sizeof(smallint)) { newtree->type = INTARRAY; newtree->iarray = (int *) atom->molecule; } else { newtree->type = BIGINTARRAY; newtree->barray = (bigint *) atom->molecule; } newtree->nstride = 1; } else if (strcmp(word,"x") == 0) newtree->array = &atom->x[0][0]; else if (strcmp(word,"y") == 0) newtree->array = &atom->x[0][1]; else if (strcmp(word,"z") == 0) newtree->array = &atom->x[0][2]; else if (strcmp(word,"vx") == 0) newtree->array = &atom->v[0][0]; else if (strcmp(word,"vy") == 0) newtree->array = &atom->v[0][1]; else if (strcmp(word,"vz") == 0) newtree->array = &atom->v[0][2]; else if (strcmp(word,"fx") == 0) newtree->array = &atom->f[0][0]; else if (strcmp(word,"fy") == 0) newtree->array = &atom->f[0][1]; else if (strcmp(word,"fz") == 0) newtree->array = &atom->f[0][2]; } /* ---------------------------------------------------------------------- check if word matches a constant return 1 if yes, else 0 customize by adding a constant: PI ------------------------------------------------------------------------- */ int Variable::is_constant(char *word) { if (strcmp(word,"PI") == 0) return 1; return 0; } /* ---------------------------------------------------------------------- process a constant in formula customize by adding a constant: PI ------------------------------------------------------------------------- */ double Variable::constant(char *word) { if (strcmp(word,"PI") == 0) return MY_PI; return 0.0; } /* ---------------------------------------------------------------------- read a floating point value from a string generate an error if not a legitimate floating point value ------------------------------------------------------------------------- */ double Variable::numeric(char *str) { int n = strlen(str); for (int i = 0; i < n; i++) { if (isdigit(str[i])) continue; if (str[i] == '-' || str[i] == '+' || str[i] == '.') continue; if (str[i] == 'e' || str[i] == 'E') continue; error->all(FLERR, "Expected floating point parameter in variable definition"); } return atof(str); } /* ---------------------------------------------------------------------- read an integer value from a string generate an error if not a legitimate integer value ------------------------------------------------------------------------- */ int Variable::inumeric(char *str) { int n = strlen(str); for (int i = 0; i < n; i++) { if (isdigit(str[i]) || str[i] == '-' || str[i] == '+') continue; error->all(FLERR,"Expected integer parameter in variable definition"); } return atoi(str); } /* ---------------------------------------------------------------------- find next comma in str skip commas inside one or more nested parenthesis only return ptr to comma at level 0, else NULL if not found ------------------------------------------------------------------------- */ char *Variable::find_next_comma(char *str) { int level = 0; for (char *p = str; *p; ++p) { if ('(' == *p) level++; else if (')' == *p) level--; else if (',' == *p && !level) return p; } return NULL; } /* ---------------------------------------------------------------------- debug routine for printing formula tree recursively ------------------------------------------------------------------------- */ void Variable::print_tree(Tree *tree, int level) { printf("TREE %d: %d %g\n",level,tree->type,tree->value); if (tree->left) print_tree(tree->left,level+1); if (tree->middle) print_tree(tree->middle,level+1); if (tree->right) print_tree(tree->right,level+1); return; } /* ---------------------------------------------------------------------- recursive evaluation of string str called from "if" command in input script str is a boolean expression containing one or more items: number = 0.0, -5.45, 2.8e-4, ... math operation = (),x==y,x!=y,xy,x>=y,x&&y,x||y ------------------------------------------------------------------------- */ double Variable::evaluate_boolean(char *str) { int op,opprevious,flag1,flag2; double value1,value2; char onechar; char *str1,*str2; struct Arg { int flag; // 0 for numeric value, 1 for string double value; // stored numeric value char *str; // stored string }; Arg argstack[MAXLEVEL]; int opstack[MAXLEVEL]; int nargstack = 0; int nopstack = 0; int i = 0; int expect = ARG; while (1) { onechar = str[i]; // whitespace: just skip if (isspace(onechar)) i++; // ---------------- // parentheses: recursively evaluate contents of parens // ---------------- else if (onechar == '(') { if (expect == OP) error->all(FLERR,"Invalid Boolean syntax in if command"); expect = OP; char *contents; i = find_matching_paren(str,i,contents); i++; // evaluate contents and push on stack argstack[nargstack].value = evaluate_boolean(contents); argstack[nargstack].flag = 0; nargstack++; delete [] contents; // ---------------- // number: push value onto stack // ---------------- } else if (isdigit(onechar) || onechar == '.' || onechar == '-') { if (expect == OP) error->all(FLERR,"Invalid Boolean syntax in if command"); expect = OP; // set I to end of number, including scientific notation int istart = i++; while (isdigit(str[i]) || str[i] == '.') i++; if (str[i] == 'e' || str[i] == 'E') { i++; if (str[i] == '+' || str[i] == '-') i++; while (isdigit(str[i])) i++; } onechar = str[i]; str[i] = '\0'; argstack[nargstack].value = atof(&str[istart]); str[i] = onechar; argstack[nargstack++].flag = 0; // ---------------- // string: push string onto stack // ---------------- } else if (isalpha(onechar)) { if (expect == OP) error->all(FLERR,"Invalid Boolean syntax in if command"); expect = OP; // set I to end of string int istart = i++; while (isalnum(str[i]) || str[i] == '_') i++; int n = i - istart + 1; argstack[nargstack].str = new char[n]; onechar = str[i]; str[i] = '\0'; strcpy(argstack[nargstack].str,&str[istart]); str[i] = onechar; argstack[nargstack++].flag = 1; // ---------------- // Boolean operator, including end-of-string // ---------------- } else if (strchr("<>=!&|\0",onechar)) { if (onechar == '=') { if (str[i+1] != '=') error->all(FLERR,"Invalid Boolean syntax in if command"); op = EQ; i++; } else if (onechar == '!') { if (str[i+1] == '=') { op = NE; i++; } else op = NOT; } else if (onechar == '<') { if (str[i+1] != '=') op = LT; else { op = LE; i++; } } else if (onechar == '>') { if (str[i+1] != '=') op = GT; else { op = GE; i++; } } else if (onechar == '&') { if (str[i+1] != '&') error->all(FLERR,"Invalid Boolean syntax in if command"); op = AND; i++; } else if (onechar == '|') { if (str[i+1] != '|') error->all(FLERR,"Invalid Boolean syntax in if command"); op = OR; i++; } else op = DONE; i++; if (op == NOT && expect == ARG) { opstack[nopstack++] = op; continue; } if (expect == ARG) error->all(FLERR,"Invalid Boolean syntax in if command"); expect = ARG; // evaluate stack as deep as possible while respecting precedence // before pushing current op onto stack while (nopstack && precedence[opstack[nopstack-1]] >= precedence[op]) { opprevious = opstack[--nopstack]; nargstack--; flag2 = argstack[nargstack].flag; value2 = argstack[nargstack].value; str2 = argstack[nargstack].str; if (opprevious != NOT) { nargstack--; flag1 = argstack[nargstack].flag; value1 = argstack[nargstack].value; str1 = argstack[nargstack].str; } if (opprevious == NOT) { if (flag2) error->all(FLERR,"Invalid Boolean syntax in if command"); if (value2 == 0.0) argstack[nargstack].value = 1.0; else argstack[nargstack].value = 0.0; } else if (opprevious == EQ) { if (flag1 != flag2) error->all(FLERR,"Invalid Boolean syntax in if command"); if (flag2 == 0) { if (value1 == value2) argstack[nargstack].value = 1.0; else argstack[nargstack].value = 0.0; } else { if (strcmp(str1,str2) == 0) argstack[nargstack].value = 1.0; else argstack[nargstack].value = 0.0; delete [] str1; delete [] str2; } } else if (opprevious == NE) { if (flag1 != flag2) error->all(FLERR,"Invalid Boolean syntax in if command"); if (flag2 == 0) { if (value1 != value2) argstack[nargstack].value = 1.0; else argstack[nargstack].value = 0.0; } else { if (strcmp(str1,str2) != 0) argstack[nargstack].value = 1.0; else argstack[nargstack].value = 0.0; delete [] str1; delete [] str2; } } else if (opprevious == LT) { if (flag2) error->all(FLERR,"Invalid Boolean syntax in if command"); if (value1 < value2) argstack[nargstack].value = 1.0; else argstack[nargstack].value = 0.0; } else if (opprevious == LE) { if (flag2) error->all(FLERR,"Invalid Boolean syntax in if command"); if (value1 <= value2) argstack[nargstack].value = 1.0; else argstack[nargstack].value = 0.0; } else if (opprevious == GT) { if (flag2) error->all(FLERR,"Invalid Boolean syntax in if command"); if (value1 > value2) argstack[nargstack].value = 1.0; else argstack[nargstack].value = 0.0; } else if (opprevious == GE) { if (flag2) error->all(FLERR,"Invalid Boolean syntax in if command"); if (value1 >= value2) argstack[nargstack].value = 1.0; else argstack[nargstack].value = 0.0; } else if (opprevious == AND) { if (flag2) error->all(FLERR,"Invalid Boolean syntax in if command"); if (value1 != 0.0 && value2 != 0.0) argstack[nargstack].value = 1.0; else argstack[nargstack].value = 0.0; } else if (opprevious == OR) { if (flag2) error->all(FLERR,"Invalid Boolean syntax in if command"); if (value1 != 0.0 || value2 != 0.0) argstack[nargstack].value = 1.0; else argstack[nargstack].value = 0.0; } argstack[nargstack++].flag = 0; } // if end-of-string, break out of entire formula evaluation loop if (op == DONE) break; // push current operation onto stack opstack[nopstack++] = op; } else error->all(FLERR,"Invalid Boolean syntax in if command"); } if (nopstack) error->all(FLERR,"Invalid Boolean syntax in if command"); if (nargstack != 1) error->all(FLERR,"Invalid Boolean syntax in if command"); return argstack[0].value; } /* ---------------------------------------------------------------------- */ unsigned int Variable::data_mask(int ivar) { if (eval_in_progress[ivar]) return EMPTY_MASK; eval_in_progress[ivar] = 1; unsigned int datamask = data_mask(data[ivar][0]); eval_in_progress[ivar] = 0; return datamask; } /* ---------------------------------------------------------------------- */ unsigned int Variable::data_mask(char *str) { unsigned int datamask = EMPTY_MASK; - for (unsigned int i=0; i < strlen(str)-2; i++) { + for (unsigned int i = 0; i < strlen(str)-2; i++) { int istart = i; while (isalnum(str[i]) || str[i] == '_') i++; int istop = i-1; int n = istop - istart + 1; char *word = new char[n+1]; strncpy(word,&str[istart],n); word[n] = '\0'; // ---------------- // compute // ---------------- if ((strncmp(word,"c_",2) == 0) && (i>0) && (!isalnum(str[i-1]))) { if (domain->box_exist == 0) error->all(FLERR, "Variable evaluation before simulation box is defined"); n = strlen(word) - 2 + 1; char *id = new char[n]; strcpy(id,&word[2]); int icompute = modify->find_compute(id); if (icompute < 0) error->all(FLERR,"Invalid compute ID in variable formula"); datamask &= modify->compute[icompute]->data_mask(); delete [] id; } if ((strncmp(word,"f_",2) == 0) && (i>0) && (!isalnum(str[i-1]))) { - if (domain->box_exist == 0) - error->all(FLERR, - "Variable evaluation before simulation box is defined"); - - n = strlen(word) - 2 + 1; - char *id = new char[n]; - strcpy(id,&word[2]); - - int ifix = modify->find_fix(id); - if (ifix < 0) error->all(FLERR,"Invalid fix ID in variable formula"); - - datamask &= modify->fix[ifix]->data_mask(); - delete [] id; + if (domain->box_exist == 0) + error->all(FLERR, + "Variable evaluation before simulation box is defined"); + + n = strlen(word) - 2 + 1; + char *id = new char[n]; + strcpy(id,&word[2]); + + int ifix = modify->find_fix(id); + if (ifix < 0) error->all(FLERR,"Invalid fix ID in variable formula"); + + datamask &= modify->fix[ifix]->data_mask(); + delete [] id; } - + if ((strncmp(word,"v_",2) == 0) && (i>0) && (!isalnum(str[i-1]))) { int ivar = find(word); datamask &= data_mask(ivar); } delete [] word; } return datamask; } /* ---------------------------------------------------------------------- class to read variable values from a file for flag = SCALARFILE, reads one value per line for flag = ATOMFILE, reads set of one value per atom ------------------------------------------------------------------------- */ VarReader::VarReader(LAMMPS *lmp, char *name, char *file, int flag) : Pointers(lmp) { me = comm->me; style = flag; if (me == 0) { fp = fopen(file,"r"); if (fp == NULL) { char str[128]; sprintf(str,"Cannot open file variable file %s",file); error->one(FLERR,str); } } else fp = NULL; // if atomfile-style variable, must store per-atom values read from file // allocate a new fix STORE, so they persist // id = variable-ID + VARIABLE_STORE, fix group = all fix = NULL; id_fix = NULL; buffer = NULL; if (style == ATOMFILE) { if (atom->map_style == 0) error->all(FLERR, "Cannot use atomfile-style variable unless atom map exists"); int n = strlen(name) + strlen("_VARIABLE_STORE") + 1; id_fix = new char[n]; strcpy(id_fix,name); strcat(id_fix,"_VARIABLE_STORE"); char **newarg = new char*[5]; newarg[0] = id_fix; newarg[1] = (char *) "all"; newarg[2] = (char *) "STORE"; newarg[3] = (char *) "0"; newarg[4] = (char *) "1"; modify->add_fix(5,newarg); fix = (FixStore *) modify->fix[modify->nfix-1]; delete [] newarg; buffer = new char[CHUNK*MAXLINE]; } } /* ---------------------------------------------------------------------- */ VarReader::~VarReader() { if (me == 0) fclose(fp); // check modify in case all fixes have already been deleted if (fix) { if (modify) modify->delete_fix(id_fix); delete [] id_fix; delete [] buffer; } } /* ---------------------------------------------------------------------- read for SCALARFILE style read next value from file into str for file-style variable strip comments, skip blank lines return 0 if successful, 1 if end-of-file ------------------------------------------------------------------------- */ int VarReader::read_scalar(char *str) { int n; char *ptr; // read one string from file if (me == 0) { while (1) { if (fgets(str,MAXLINE,fp) == NULL) n = 0; else n = strlen(str); if (n == 0) break; // end of file str[n-1] = '\0'; // strip newline if ((ptr = strchr(str,'#'))) *ptr = '\0'; // strip comment if (strtok(str," \t\n\r\f") == NULL) continue; // skip if blank n = strlen(str) + 1; break; } } MPI_Bcast(&n,1,MPI_INT,0,world); if (n == 0) return 1; MPI_Bcast(str,n,MPI_CHAR,0,world); return 0; } /* ---------------------------------------------------------------------- read snapshot of per-atom values from file into str for atomfile-style variable return 0 if successful, 1 if end-of-file ------------------------------------------------------------------------- */ int VarReader::read_peratom() { int i,m,n,nchunk,eof; tagint tag; char *ptr,*next; double value; // set all per-atom values to 0.0 // values that appear in file will overwrite this double *vstore = fix->vstore; int nlocal = atom->nlocal; for (i = 0; i < nlocal; i++) vstore[i] = 0.0; // read one string from file, convert to Nlines char str[MAXLINE]; if (me == 0) { while (1) { if (fgets(str,MAXLINE,fp) == NULL) n = 0; else n = strlen(str); if (n == 0) break; // end of file str[n-1] = '\0'; // strip newline if ((ptr = strchr(str,'#'))) *ptr = '\0'; // strip comment if (strtok(str," \t\n\r\f") == NULL) continue; // skip if blank n = strlen(str) + 1; break; } } MPI_Bcast(&n,1,MPI_INT,0,world); if (n == 0) return 1; MPI_Bcast(str,n,MPI_CHAR,0,world); bigint nlines = ATOBIGINT(str); tagint map_tag_max = atom->map_tag_max; bigint nread = 0; while (nread < nlines) { nchunk = MIN(nlines-nread,CHUNK); eof = comm->read_lines_from_file(fp,nchunk,MAXLINE,buffer); if (eof) return 1; char *buf = buffer; for (i = 0; i < nchunk; i++) { next = strchr(buf,'\n'); *next = '\0'; sscanf(buf,TAGINT_FORMAT " %lg",&tag,&value); if (tag <= 0 || tag > map_tag_max) error->one(FLERR,"Invalid atom ID in variable file"); if ((m = atom->map(tag)) >= 0) vstore[m] = value; buf = next + 1; } nread += nchunk; } return 0; }