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autlib1.c
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autlib1.c
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#include "auto_f2c.h"
#include "auto_c.h"
#include "xAuto.h"
extern XAUTO xAuto;
extern int NODE;
extern int RestartLabel;
int restart_flag=0;
/* The memory for these are taken care of in main, and setubv for the
mpi parallel case. These are global since the they are used many times
in the wrapper functions in autlib3.c (and autlib5.c) and the cost
of allocating and deallocating them is prohibitive. */
struct {
doublereal *dfu, *dfp, *uu1, *uu2, *ff1, *ff2;
} global_scratch={NULL,NULL,NULL,NULL,NULL,NULL};
/* The memory for these are taken care of in main, and setubv for the
mpi parallel case. These are global since they only need to be
computed once for an entire run, so we do them at the
beginning to save the cost later on. */
struct {
integer irtn;
integer *nrtn;
} global_rotations = {0,NULL};
/* There are used to short circuit the code. getp is a user callable function
that allows certain parameters to be returned. Unfortunately, the
data that this function works on is NOT user accessible, so cannot
be part of its calling sequence. Accordingly, this global structure is
filled in with the necessary data so that getp has access to it when the
user calls that routine. */
struct {
rap_type *rav;
iap_type *iav;
doublereal *dtv;
} global_parameters = {NULL,NULL,NULL};
/* ----------------------------------------------------------------------- */
/* ----------------------------------------------------------------------- */
/* Initialization */
/* ----------------------------------------------------------------------- */
/* ----------------------------------------------------------------------- */
FILE *fp8;
int fp8_is_open=0;
extern char fort8[200],fort3[200];
void send_eigen();
void send_mult();
int byeauto_();
void addbif(iap_type *iap, rap_type *rap, integer ntots, integer ibrs, double *par,integer *icp,int labw, double *a, double *uhigh, double *ulow, double *u0, double *ubar);
int init(iap_type *iap, rap_type *rap, doublereal *par, integer *icp, doublereal *thl, doublereal **thu_pointer, integer *iuz, doublereal *vuz)
{
/* Local variables */
doublereal hbff, biff;
integer nbif;
doublereal fldf;
integer iads, ndim, nicp, ncol, mxbf, ithl;
doublereal epsl;
integer nthl, nfpr, nins, iplt, nint, jtmp;
doublereal epsu, epss;
integer nthu, itmx, itnw, ithu, ntot, ipos, nwtn;
doublereal tivp;
integer ntst, iuzr;
doublereal spbf;
integer nuzr, i;
doublereal dsold, dsmin, dsmax, a0, a1;
integer istop, itpst;
doublereal ds, rl0, rl1;
integer iad, jac, lab, nbc, iid, ibr, ndm;
doublereal amp, det;
integer ilp, nit, ips, isp, irs, itp, npr, isw, nmx, nbc0, nnt0;
doublereal *thu;
for (i = 0; i < NPARX; ++i) {
icp[i] = i;
jtmp = NPARX;
icp[jtmp + i] = 0;
par[i] = 0.;
par[jtmp + i] = 0.;
thl[icp[i]] = 1.;
}
ndim=xAuto.ndim;
ips=xAuto.ips;
irs=xAuto.irs;
ilp=xAuto.ilp;
thu = *thu_pointer = (doublereal *)malloc(sizeof(doublereal)*8*ndim);
for (i = 0; i < ndim * 8; ++i) {
thu[i] = 1.;
}
jtmp = NPARX;
nicp=xAuto.nicp;
for (i = 0; i < nicp; ++i) {
icp[jtmp+i]=xAuto.icp[i];
}
if (nicp > 0) {
for (i = 0; i < nicp; ++i) {
jtmp = NPARX;
icp[i] = icp[jtmp + i];
}
} else {
nicp = 1;
jtmp = NPARX;
icp[jtmp] = icp[0];
}
ntst=xAuto.ntst;
ncol=xAuto.ncol;
iad=xAuto.iad;
isp=xAuto.isp;
isw=xAuto.isw;
iplt=xAuto.iplt;
nbc=xAuto.nbc;
nint=xAuto.nint;
nmx=xAuto.nmx;
rl0=xAuto.rl0;
rl1=xAuto.rl1;
a0=xAuto.a0;
a1=xAuto.a1;
npr=xAuto.npr;
mxbf=xAuto.mxbf;
iid=xAuto.iid;
itmx=xAuto.itmx;
itnw=xAuto.itnw;
nwtn=xAuto.nwtn;
jac=xAuto.jac;
epsl=xAuto.epsl;
epss=xAuto.epss;
epsu=xAuto.epsu;
ds=xAuto.ds;
dsmin=xAuto.dsmin;
dsmax=xAuto.dsmax;
iads=xAuto.iads;
if(dsmin < 0.0) {
printf("Warning : DSMIN less then 0.0, will use absolute value instead.");
dsmin = fabs(dsmin);
}
if(dsmax < 0.0) {
printf("Warning : DSMAX less then 0.0, will use absolute value instead.");
dsmax = fabs(dsmax);
}
nthl=xAuto.nthl;
if (nthl > 0) {
for (i = 0; i < nthl; ++i)
thl[xAuto.ithl[i]]=xAuto.thl[i];
}
nthu=0;
nuzr=xAuto.nuzr;
for(i=0;i<nuzr;i++)
{
iuz[i]=xAuto.iuz[i];
vuz[i]=xAuto.vuz[i];
}
iap->ndim = ndim;
iap->ips = ips;
iap->irs = irs;
iap->ilp = ilp;
iap->ntst = ntst;
iap->ncol = ncol;
iap->iad = iad;
iap->iads = iads;
iap->isp = isp;
iap->isw = isw;
iap->iplt = iplt;
iap->nbc = nbc;
iap->nint = nint;
iap->nmx = nmx;
iap->nuzr = nuzr;
iap->npr = npr;
iap->mxbf = mxbf;
iap->iid = iid;
iap->itmx = itmx;
iap->itnw = itnw;
iap->nwtn = nwtn;
iap->jac = jac;
ndm = ndim;
if (nbc != 0) {
nbc0 = nbc;
} else {
nbc0 = 1;
}
if (nint != 0) {
nnt0 = nint;
} else {
nnt0 = 1;
}
iuzr = 1;
itp = 0;
itpst = 0;
nfpr = 1;
ibr = 1;
nit = 0;
ntot = 0;
nins = 0;
istop = 0;
nbif = 0;
ipos = 1;
lab = 0;
iap->ndm = ndm;
iap->nbc0 = nbc0;
iap->nnt0 = nnt0;
iap->iuzr = iuzr;
iap->itp = itp;
iap->itpst = itpst;
iap->nfpr = nfpr;
iap->ibr = ibr;
iap->nit = nit;
iap->ntot = ntot;
iap->nins = nins;
iap->istop = istop;
iap->nbif = nbif;
iap->ipos = ipos;
iap->lab = lab;
iap->nicp = nicp;
rap->ds = ds;
rap->dsmin = dsmin;
rap->dsmax = dsmax;
dsold = ds;
rap->dsold = dsold;
rap->rl0 = rl0;
rap->rl1 = rl1;
rap->a0 = a0;
rap->a1 = a1;
amp = 0.;
det = 0.;
tivp = 0.;
fldf = 0.;
hbff = 0.;
biff = 0.;
spbf = 0.;
rap->amp = amp;
rap->epsl = epsl;
rap->epsu = epsu;
rap->epss = epss;
rap->det = det;
rap->tivp = tivp;
rap->fldf = fldf;
rap->hbff = hbff;
rap->biff = biff;
rap->spbf = spbf;
return 0;
}
/* ---------- ----- */
/* Subroutine */ int
chdim(iap_type *iap)
{
/* Local variables */
integer npar;
/* Check dimensions. */
npar = iap->nfpr;
if (npar > NPARX) {
if (iap->mynode == 0) {
printf("Dimension exceeded : NPAR=%5ld maximum=%5d (Increase NPARX in auto.h and recompile AUTO",npar,NPARX);
}
exit(0);
}
return 0;
} /* chdim_ */
/* ----------------------------------------------------------------------- */
/* ----------------------------------------------------------------------- */
/* The leading subroutines of AUTO */
/* ----------------------------------------------------------------------- */
/* ----------------------------------------------------------------------- */
int autoae(iap_type *iap, rap_type *rap, doublereal *par,
integer *icp,
FUNI_TYPE((*funi)),
STPNT_TYPE_AE((*stpnt)),
PVLI_TYPE_AE((*pvli)),
doublereal *thl, doublereal *thu, integer *iuz, doublereal *vuz)
{
/* This is the entry subroutine for algebraic systems. */
cnrlae(iap, rap, par, icp, funi, stpnt, pvli, thl, thu, iuz, vuz);
return 0;
}
int
autobv(iap_type *iap, rap_type *rap, doublereal *par, integer *icp, FUNI_TYPE((*funi)), BCNI_TYPE((*bcni)), ICNI_TYPE((*icni)), STPNT_TYPE_BVP((*stpnt)), PVLI_TYPE_BVP((*pvli)), doublereal *thl, doublereal *thu, integer *iuz, doublereal *vuz)
{
/* THIS IS THE ENTRY ROUTINE FOR GENERAL BOUNDARY VALUE PROBLEMS. */
cnrlbv(iap, rap, par, icp, funi, bcni, icni, stpnt, pvli, thl, thu, iuz, vuz);
return 0;
}
/* ---------- ----- */
/* Subroutine */ int
init1(iap_type *iap, rap_type *rap, integer *icp, doublereal *par)
{
/* Local variables */
integer ndim, ncol, nicp;
integer nneg, nfpr, nint, jtmp, nuzr, i;
doublereal dsmin, dsmax, fc;
integer ic, jc;
int ii;
doublereal ds;
integer nxploc, jac, nbc, ndm, ict[NPARX], ilp, ips, isp, irs, itp,
isw, nmx;
/* General initialization. Redefinition of constants. */
ndim = iap->ndim;
ips = iap->ips;
irs = iap->irs;
ilp = iap->ilp;
ncol = iap->ncol;
isp = iap->isp;
isw = iap->isw;
nbc = iap->nbc;
nint = iap->nint;
nmx = iap->nmx;
nuzr = iap->nuzr;
jac = iap->jac;
itp = iap->itp;
nfpr = iap->nfpr;
nicp = iap->nicp;
ds = rap->ds;
dsmin = rap->dsmin;
dsmax = rap->dsmax;
if (isw == 0) {
isw = 1;
}
/* Check and perturb pseudo arclength stepsize and steplimits. */
/* (Perturbed to avoid exact computation of certain singular points). */
if (ds == 0.) {
ds = (double).1;
}
if (dsmin == 0.) {
dsmin = fabs(ds) * 1e-4;
}
fc = HMACH1;
ds = fc * ds;
dsmin /= fc;
dsmax = fc * dsmax;
/* Redefinition for waves */
if (ips == 11) {
ips = 1;
iap->ips = ips;
ndim <<= 1;
ndm = ndim;
iap->ndm = ndm;
} else if (ips == 12) {
ips = 2;
iap->ips = ips;
ndim <<= 1;
ndm = ndim;
iap->ndm = ndm;
}
/* General Redefinition. */
if (abs(ips) <= 1 && isw == 1) {
/* ** Algebraic Systems */
nfpr = 1;
} else if (ips == -2) {
/* ** Time integration */
nfpr = 1;
isp = 0;
ilp = 0;
icp[0] = 13;
} else if (ips == 2 && abs(isw) == 1) {
/* ** Periodic Solutions */
nbc = ndim;
nint = 1;
nfpr = nbc + nint - ndim + 1;
/* **ISW=1 when starting from a HB */
if (itp == 3 || abs(itp) / 10 == 3) {
isw = 1;
}
if (nicp == 1) {
/* **Variable period */
icp[1] = 10;
}
} else if (ips == 4 && abs(isw) == 1) {
/* ** Boundary value problems */
nfpr = nbc + nint - ndim + 1;
} else if (ips == 7 && abs(isw) == 1) {
/* ** Boundary value problems */
nfpr = nbc + nint - ndim + 1;
} else if (ips == 9 && abs(isw) == 1) {
/* ** Homoclinic bifurcation analysis */
/* Redefine AUTO constants for homoclinic orbits */
inho(iap, icp, par);
ndim = iap->ndim;
nbc = iap->nbc;
nint = iap->nint;
nuzr = iap->nuzr;
nfpr = nbc + nint - ndim + 1;
/* printf("%d %d %d %d %d\n",ndim,nbc,nint,nuzr,nfpr);
for(ii=0;ii<nfpr;ii++)
printf("%d %d \n",ii,icp[ii]);
*/
} else if (ips == 14 || ips == 16) {
/* **Evolution calculations for Parabolic Systems */
ndim <<= 1;
nbc = ndim;
nint = 0;
nfpr = 1;
ilp = 0;
isp = 0;
icp[0] = 13;
} else if (ips == 17) {
/* **Stationary calculations for Parabolic Systems */
ndim <<= 1;
nbc = ndim;
nint = 0;
nfpr = 1;
} else if (ips == 15) {
/* ** Optimization of periodic solutions */
for (i = 0; i < nicp; ++i) {
ict[i] = icp[i];
}
nfpr = 0;
for (i = 0; i < nicp; ++i) {
if (ict[i] >= 0) {
icp[nfpr] = ict[i];
++nfpr;
}
}
icp[nfpr] = 9;
icp[nfpr + 1] = 12;
icp[nfpr + 2] = 13;
nfpr += 3;
ndim <<= 1;
nbc = ndim;
nint = nfpr - 1;
/* overload to define optimality integrals */
nneg = 0;
for (i = 0; i < nicp; ++i) {
ic = ict[i];
jc = abs(ic) - 20;
if (ic < 0 && jc > 0 && jc <= 11) {
++nneg;
icp[nfpr + nneg - 1] = jc;
}
}
/* Set indices of output parameters */
nicp = nfpr - 3;
for (i = 0; i < nicp; ++i) {
jtmp = NPARX;
icp[jtmp + i] = icp[i];
}
} else if (ips == 5) {
/* ** Algebraic optimization Problems */
if (iap->itp % 10 == 2 || iap->irs == 0) {
iap->nfpr++;
}
nfpr = iap->nfpr;
if (nfpr == 2) {
++ndim;
icp[0] = 9;
} else {
ndim = (ndim << 1) + nfpr;
icp[0] = 9;
}
} else if (irs > 0 && abs(isw) == 2) {
/* ** Continuation of singular points */
if ((itp == 1 || abs(itp) / 10 == 1 || itp == 2 || abs(itp) / 10 == 2)
&& abs(ips) <= 1) {
/* ** Fold continuation (Algebraic Problems) */
ndim = (ndim << 1) + 1;
nfpr = 2;
} else if ((itp == 3 || abs(itp) / 10 == 3) && abs(ips) <= 1) {
/* ** Hopf bifurcation continuation (Maps, ODE, Waves) */
ndim = ndim * 3 + 2;
nfpr = 2;
} else if ((itp == 5 || itp == 6) && ips == 2) {
/* ** Fold continuation (Periodic solutions); start */
ndim <<= 1;
nbc = ndim;
nint = 3;
nfpr = nbc + nint - ndim + 1;
if (icp[2] == 10 || nicp == 2) {
/* ** Variable period */
icp[1] = 12;
icp[2] = 10;
icp[3] = 11;
} else {
/* ** Fixed period */
icp[2] = 12;
icp[3] = 11;
}
ilp = 0;
isw = -2;
isp = 0;
nmx = 5;
if (iap->mynode == 0) {
printf("\nGenerating starting data :\n Restart at EP label below :\n");
restart_flag=1;
}
} else if ((abs(itp) / 10 == 5 || abs(itp) / 10 == 6) && ips == 2) {
/* ** Fold continuation (Periodic solutions); restart */
ndim <<= 1;
nbc = ndim;
nint = 3;
nfpr = nbc + nint - ndim + 1;
if (nicp == 2) {
/* ** Variable period */
icp[2] = 10;
}
icp[3] = 11;
} else if (itp == 7 && ips == 2) {
/* ** Continuation of period doubling bifurcations; start
*/
ndim <<= 1;
nbc = ndim;
nint = 2;
nfpr = nbc + nint - ndim + 1;
if (icp[2] == 10 || nicp == 2) {
/* ** Variable period */
icp[1] = 10;
icp[2] = 12;
} else {
/* ** Fixed period */
icp[2] = 12;
}
ilp = 0;
isw = -2;
isp = 0;
nmx = 5;
if (iap->mynode == 0) {
printf("\nGenerating starting data :\n Restart at EP label below :\n");
restart_flag=1;
}
} else if (abs(itp) / 10 == 7 && ips == 2) {
/* ** Continuation of period doubling bifurcations; resta
rt */
ndim <<= 1;
nbc = ndim;
nint = 2;
nfpr = nbc + nint - ndim + 1;
if (icp[2] == 10 || nicp == 2) {
/* ** Variable period */
icp[2] = 10;
}
} else if (itp == 8 && ips == 2) {
/* ** Continuation of torus bifurcations; start */
ndim *= 3;
nbc = ndim;
nint = 3;
nfpr = nbc + nint - ndim + 1;
icp[1] = 10;
icp[2] = 11;
icp[3] = 12;
ilp = 0;
isp = 0;
isw = -2;
nmx = 5;
if (iap->mynode == 0) {
printf("\nGenerating starting data :\n Restart at EP label below :\n");
restart_flag=1;
}
} else if (abs(itp) / 10 == 8 && ips == 2) {
/* ** Continuation of torus bifurcations; restart */
ndim *= 3;
nbc = ndim;
nint = 3;
nfpr = nbc + nint - ndim + 1;
icp[2] = 10;
icp[3] = 11;
} else if ((itp == 5 || itp == 6) && ips == 4) {
/* ** Continuation of folds (BVP; start) */
ndim <<= 1;
nbc <<= 1;
nint = (nint << 1) + 1;
nfpr = nbc + nint - ndim + 1;
nxploc = nfpr / 2 - 1;
if (nxploc > 0) {
for (i = 0; i < nxploc; ++i) {
icp[nfpr / 2 + i] = i + 10;
}
}
icp[nfpr / 2] = nfpr / 2 + 10;
ilp = 0;
isw = -2;
isp = 0;
nmx = 5;
if (iap->mynode == 0) {
restart_flag=1;
printf("\nGenerating starting data :\n Restart at EP label below :\n");
}
} else if ((abs(itp) / 10 == 5 || abs(itp) / 10 == 5) && ips == 4) {
/* ** Continuation of folds (BVP; restart) */
ndim <<= 1;
nbc <<= 1;
nint = (nint << 1) + 1;
nfpr = nbc + nint - ndim + 1;
nxploc = nfpr / 2 - 1;
if (nxploc > 0) {
for (i = 0; i < nxploc; ++i) {
icp[nfpr / 2 + i] = i + 10;
}
}
}
}
iap->ndim = ndim;
iap->ips = ips;
iap->irs = irs;
iap->ilp = ilp;
iap->ncol = ncol;
iap->isp = isp;
iap->isw = isw;
iap->nbc = nbc;
iap->nint = nint;
iap->nmx = nmx;
iap->nuzr = nuzr;
iap->jac = jac;
iap->nfpr = nfpr;
iap->nicp = nicp;
rap->ds = ds;
rap->dsmin = dsmin;
rap->dsmax = dsmax;
/* printf("ready to go \n");
printf("dim=%d ps=%d rs=%d lp=%d sp=%d sw=%d nbc=%d nint=%d nfpr=%d nicp=%d\n",
ndim,ips,irs,ilp,isp,isw,nbc,nint,nfpr,nicp); */
return 0;
} /* init1 */
/* ----------------------------------------------------------------------- */
/* ----------------------------------------------------------------------- */
/* Algebraic Problems */
/* ----------------------------------------------------------------------- */
/* ----------------------------------------------------------------------- */
/* ---------- ------ */
/* Subroutine */ int
cnrlae(iap_type *iap, rap_type *rap, doublereal *par, integer *icp, FUNI_TYPE((*funi)), STPNT_TYPE_AE((*stpnt)), PVLI_TYPE_AE((*pvli)), doublereal *thl, doublereal *thu, integer *iuz, doublereal *vuz)
{
/* Local variables */
integer nbfc;
doublereal *dfdp;
integer nbif, iads;
doublereal *dfdu;
integer mxbf;
doublereal *uold, stla[NBIFX], stld[NBIFX];
integer nins;
doublereal *udot;
integer ipos;
doublereal *stud;
integer ntot, iuzr, nuzr;
doublereal *f;
integer i, k;
doublereal *u, dsold;
doublereal rlold[NPARX], rldot[NPARX], rlcur[NPARX];
integer istop, itpst;
doublereal *aa;
doublereal ds, *du;
integer lab, ibr, ndm;
doublereal rbp, rds;
integer ips;
doublereal *rhs;
integer irs, isp;
doublereal rev;
integer isw;
doublereal rlp;
integer nit, itp;
doublereal *stu, *uzr;
integer aa_first_dimension = iap->ndim + 1;
dfdp = (doublereal *)malloc(sizeof(doublereal)*(iap->ndim)*NPARX);
dfdu = (doublereal *)malloc(sizeof(doublereal)*(iap->ndim)*(iap->ndim));
uold = (doublereal *)malloc(sizeof(doublereal)*(iap->ndim));
udot = (doublereal *)malloc(sizeof(doublereal)*(iap->ndim));
stud = (doublereal *)malloc(sizeof(doublereal)*(iap->ndim)*NBIFX);
f = (doublereal *)malloc(sizeof(doublereal)*(iap->ndim));
u = (doublereal *)malloc(sizeof(doublereal)*(iap->ndim));
aa = (doublereal *)malloc(sizeof(doublereal)*(iap->ndim+1)*(iap->ndim+1));
du = (doublereal *)malloc(sizeof(doublereal)*(iap->ndim+1));
rhs = (doublereal *)malloc(sizeof(doublereal)*(iap->ndim+1));
stu = (doublereal *)malloc(sizeof(doublereal)*(iap->ndim)*NBIFX);
uzr = (doublereal *)malloc(sizeof(doublereal)*(iap->nuzr));
/* Controls the bifurcation analysis of algebraic problems */
/* Local */
ips = iap->ips;
irs = iap->irs;
iads = iap->iads;
isp = iap->isp;
isw = iap->isw;
nuzr = iap->nuzr;
mxbf = iap->mxbf;
ndm = iap->ndm;
itpst = iap->itpst;
ibr = iap->ibr;
ds = rap->ds;
nins = 0;
iap->nins = nins;
rbp = 0.;
rev = 0.;
rlp = 0.;
if (nuzr > 0) {
for (i = 0; i < nuzr; ++i) {
uzr[i] = 0.;
}
}
rds = ds;
dsold = ds;
rap->dsold = dsold;
nit = 0;
iap->nit = nit;
nbif = 0;
iap->nbif = nbif;
nbfc = 0;
ipos = 1;
iap->ipos = ipos;
ntot = 0;
iap->ntot = ntot;
lab = 0;
iap->lab = lab;
for (i = 0; i < iap->ndim; ++i) {
u[i] = 0.;
du[i] = 0.;
udot[i] = 0.;
uold[i] = 0.;
f[i] = 0.;
}
/* Generate the starting point */
(*stpnt)(iap, rap, par, icp, u);
(*pvli)(iap, rap, u, par);
/* Determine a suitable starting label and branch number */
newlab(iap, rap);
/* Write constants */
sthd(iap, rap, par, icp, thl, thu);
/* Write plotting data for the starting point */
istop = 0;
iap->istop = istop;
if (irs == 0) {
itp = itpst * 10 + 9;
} else {
itp = 0;
}
iap->itp = itp;
rlcur[0] = par[icp[0]];
stplae(iap, rap, par, icp, rlcur, u);
istop = iap->istop;
if (istop == 1) {
goto L6;
}
/* Starting procedure (to get second point on first branch) : */
stprae(iap, rap, par, icp, funi, &rds, &aa_first_dimension, aa,
rhs, rlcur, rlold, rldot, u, du, uold, udot, f, dfdu, dfdp, thl,
thu);
istop = iap->istop;
if (istop == 1) {
goto L5;
}
itp = 0;
iap->itp = itp;
goto L3;
/* Initialize computation of the next bifurcating branch. */
L2:
swpnt(iap, rap, par, icp, &rds, NBIFX, stud, stu,
stla, stld, rlcur, rlold, rldot, u, udot);
ipos = iap->ipos;
if (ipos == 1) {
--nbif;
iap->nbif = nbif;
++nbfc;
}
rbp = 0.;
rev = 0.;
rlp = 0.;
if (nuzr > 0) {
for (i = 0; i < nuzr; ++i) {
uzr[i] = 0.;
}
}
if (ipos == 0 || mxbf < 0) {
++ibr;
}
iap->ibr = ibr;
ntot = 0;
iap->ntot = ntot;
istop = 0;
iap->istop = istop;
itp = 0;
iap->itp = itp;
nit = 0;
iap->nit = nit;
dsold = rds;
rap->dsold = dsold;
/* Store plotting data for first point on the bifurcating branch */
stplae(iap, rap, par, icp, rlcur, u);
istop = iap->istop;
if (istop == 1) {
goto L6;
}
/* Determine the second point on the bifurcating branch */
swprc(iap, rap, par, icp, funi, &aa_first_dimension, aa, rhs,
rlcur, rlold, rldot, u, du, uold, udot, f, dfdu, dfdp, &rds, thl,
thu);
istop = iap->istop;
if (istop == 1) {
goto L5;
}
/* Store plotting data for second point : */
stplae(iap, rap, par, icp, rlcur, u);
istop = iap->istop;
if (istop == 1) {
goto L6;
}
rbp = 0.;