236 lines
7.0 KiB
C
236 lines
7.0 KiB
C
/*************************************************************************/
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/* */
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/* Copyright (c) 1994 Stanford University */
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/* */
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/* All rights reserved. */
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/* */
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/* Permission is given to use, copy, and modify this software for any */
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/* non-commercial purpose as long as this copyright notice is not */
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/* removed. All other uses, including redistribution in whole or in */
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/* part, are forbidden without prior written permission. */
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/* */
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/* This software is provided with absolutely no warranty and no */
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/* support. */
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/* */
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/*************************************************************************/
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/*
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* CODE_IO.C:
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*/
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EXTERN_ENV
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#define global extern
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#include "stdinc.h"
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/*
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* INPUTDATA: read initial conditions from input file.
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*/
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void inputdata ()
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{
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stream instr;
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permanent char headbuf[128];
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long ndim;
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real tnow;
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bodyptr p;
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long i;
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fprintf(stderr,"reading input file : %s\n",infile);
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fflush(stderr);
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instr = fopen(infile, "r");
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if (instr == NULL)
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error("inputdata: cannot find file %s\n", infile);
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sprintf(headbuf, "Hack code: input file %s\n", infile);
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headline = headbuf;
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in_int(instr, &nbody);
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if (nbody < 1)
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error("inputdata: nbody = %ld is absurd\n", nbody);
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in_int(instr, &ndim);
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if (ndim != NDIM)
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error("inputdata: NDIM = %ld ndim = %ld is absurd\n", NDIM, ndim);
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in_real(instr, &tnow);
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for (i = 0; i < MAX_PROC; i++) {
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Local[i].tnow = tnow;
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}
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bodytab = (bodyptr) G_MALLOC(nbody * sizeof(body));
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if (bodytab == NULL)
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error("inputdata: not enuf memory\n");
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for (p = bodytab; p < bodytab+nbody; p++) {
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Type(p) = BODY;
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Cost(p) = 1;
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Phi(p) = 0.0;
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CLRV(Acc(p));
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}
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for (p = bodytab; p < bodytab+nbody; p++)
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in_real(instr, &Mass(p));
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for (p = bodytab; p < bodytab+nbody; p++)
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in_vector(instr, Pos(p));
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for (p = bodytab; p < bodytab+nbody; p++)
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in_vector(instr, Vel(p));
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fclose(instr);
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}
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/*
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* INITOUTPUT: initialize output routines.
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*/
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void initoutput()
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{
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printf("\n\t\t%s\n\n", headline);
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printf("%10s%10s%10s%10s%10s%10s%10s%10s\n",
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"nbody", "dtime", "eps", "tol", "dtout", "tstop","fcells","NPROC");
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printf("%10ld%10.5f%10.4f%10.2f%10.3f%10.3f%10.2f%10ld\n\n",
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nbody, dtime, eps, tol, dtout, tstop, fcells, NPROC);
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}
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/*
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* STOPOUTPUT: finish up after a run.
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*/
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/*
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* OUTPUT: compute diagnostics and output data.
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*/
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void output(long ProcessId)
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{
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long nttot, nbavg, ncavg,k;
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vector tempv1,tempv2;
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if ((Local[ProcessId].tout - 0.01 * dtime) <= Local[ProcessId].tnow) {
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Local[ProcessId].tout += dtout;
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}
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diagnostics(ProcessId);
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if (Local[ProcessId].mymtot!=0) {
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LOCK(Global->CountLock);
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Global->n2bcalc += Local[ProcessId].myn2bcalc;
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Global->nbccalc += Local[ProcessId].mynbccalc;
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Global->selfint += Local[ProcessId].myselfint;
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ADDM(Global->keten, Global-> keten, Local[ProcessId].myketen);
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ADDM(Global->peten, Global-> peten, Local[ProcessId].mypeten);
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for (k=0;k<3;k++) Global->etot[k] += Local[ProcessId].myetot[k];
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ADDV(Global->amvec, Global-> amvec, Local[ProcessId].myamvec);
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MULVS(tempv1, Global->cmphase[0],Global->mtot);
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MULVS(tempv2, Local[ProcessId].mycmphase[0], Local[ProcessId].mymtot);
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ADDV(tempv1, tempv1, tempv2);
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DIVVS(Global->cmphase[0], tempv1, Global->mtot+Local[ProcessId].mymtot);
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MULVS(tempv1, Global->cmphase[1],Global->mtot);
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MULVS(tempv2, Local[ProcessId].mycmphase[1], Local[ProcessId].mymtot);
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ADDV(tempv1, tempv1, tempv2);
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DIVVS(Global->cmphase[1], tempv1, Global->mtot+Local[ProcessId].mymtot);
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Global->mtot +=Local[ProcessId].mymtot;
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UNLOCK(Global->CountLock);
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}
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BARRIER(Global->Barrier,NPROC);
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if (ProcessId==0) {
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nttot = Global->n2bcalc + Global->nbccalc;
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nbavg = (long) ((real) Global->n2bcalc / (real) nbody);
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ncavg = (long) ((real) Global->nbccalc / (real) nbody);
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}
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}
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/*
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* DIAGNOSTICS: compute set of dynamical diagnostics.
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*/
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void diagnostics(long ProcessId)
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{
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register bodyptr p,*pp;
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real velsq;
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vector tmpv;
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matrix tmpt;
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Local[ProcessId].mymtot = 0.0;
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Local[ProcessId].myetot[1] = Local[ProcessId].myetot[2] = 0.0;
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CLRM(Local[ProcessId].myketen);
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CLRM(Local[ProcessId].mypeten);
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CLRV(Local[ProcessId].mycmphase[0]);
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CLRV(Local[ProcessId].mycmphase[1]);
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CLRV(Local[ProcessId].myamvec);
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for (pp = Local[ProcessId].mybodytab+Local[ProcessId].mynbody -1;
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pp >= Local[ProcessId].mybodytab; pp--) {
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p= *pp;
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Local[ProcessId].mymtot += Mass(p);
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DOTVP(velsq, Vel(p), Vel(p));
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Local[ProcessId].myetot[1] += 0.5 * Mass(p) * velsq;
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Local[ProcessId].myetot[2] += 0.5 * Mass(p) * Phi(p);
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MULVS(tmpv, Vel(p), 0.5 * Mass(p));
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OUTVP(tmpt, tmpv, Vel(p));
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ADDM(Local[ProcessId].myketen, Local[ProcessId].myketen, tmpt);
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MULVS(tmpv, Pos(p), Mass(p));
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OUTVP(tmpt, tmpv, Acc(p));
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ADDM(Local[ProcessId].mypeten, Local[ProcessId].mypeten, tmpt);
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MULVS(tmpv, Pos(p), Mass(p));
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ADDV(Local[ProcessId].mycmphase[0], Local[ProcessId].mycmphase[0], tmpv);
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MULVS(tmpv, Vel(p), Mass(p));
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ADDV(Local[ProcessId].mycmphase[1], Local[ProcessId].mycmphase[1], tmpv);
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CROSSVP(tmpv, Pos(p), Vel(p));
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MULVS(tmpv, tmpv, Mass(p));
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ADDV(Local[ProcessId].myamvec, Local[ProcessId].myamvec, tmpv);
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}
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Local[ProcessId].myetot[0] = Local[ProcessId].myetot[1]
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+ Local[ProcessId].myetot[2];
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if (Local[ProcessId].mymtot!=0){
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DIVVS(Local[ProcessId].mycmphase[0], Local[ProcessId].mycmphase[0],
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Local[ProcessId].mymtot);
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DIVVS(Local[ProcessId].mycmphase[1], Local[ProcessId].mycmphase[1],
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Local[ProcessId].mymtot);
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}
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}
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/*
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* Low-level input and output operations.
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*/
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void in_int(stream str, long *iptr)
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{
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if (fscanf(str, "%ld", iptr) != 1)
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error("in_int: input conversion print_error\n");
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}
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void in_real(stream str, real *rptr)
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{
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double tmp;
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if (fscanf(str, "%lf", &tmp) != 1)
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error("in_real: input conversion print_error\n");
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*rptr = tmp;
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}
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void in_vector(stream str, vector vec)
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{
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double tmpx, tmpy, tmpz;
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if (fscanf(str, "%lf%lf%lf", &tmpx, &tmpy, &tmpz) != 3)
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error("in_vector: input conversion print_error\n");
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vec[0] = tmpx; vec[1] = tmpy; vec[2] = tmpz;
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}
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void out_int(stream str, long ival)
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{
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fprintf(str, " %ld\n", ival);
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}
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void out_real(stream str, real rval)
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{
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fprintf(str, " %21.14E\n", rval);
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}
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void out_vector(stream str, vector vec)
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{
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fprintf(str, " %21.14E %21.14E", vec[0], vec[1]);
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fprintf(str, " %21.14E\n",vec[2]);
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}
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