PetscErrorCode MPIPetsc_Type_compare(MPI_Datatype a,MPI_Datatype b,PetscBool *match)
{
PetscErrorCode ierr;
MPI_Datatype atype,btype;
PetscMPIInt aintcount,aaddrcount,atypecount,acombiner;
PetscMPIInt bintcount,baddrcount,btypecount,bcombiner;
PetscBool freeatype, freebtype;
PetscFunctionBegin;
ierr = MPIPetsc_Type_unwrap(a,&atype,&freeatype);CHKERRQ(ierr);
ierr = MPIPetsc_Type_unwrap(b,&btype,&freebtype);CHKERRQ(ierr);
*match = PETSC_FALSE;
if (atype == btype) {
*match = PETSC_TRUE;
goto free_types;
}
ierr = MPI_Type_get_envelope(atype,&aintcount,&aaddrcount,&atypecount,&acombiner);CHKERRQ(ierr);
ierr = MPI_Type_get_envelope(btype,&bintcount,&baddrcount,&btypecount,&bcombiner);CHKERRQ(ierr);
if (acombiner == bcombiner && aintcount == bintcount && aaddrcount == baddrcount && atypecount == btypecount && (aintcount > 0 || aaddrcount > 0 || atypecount > 0)) {
PetscMPIInt *aints,*bints;
MPI_Aint *aaddrs,*baddrs;
MPI_Datatype *atypes,*btypes;
PetscInt i;
PetscBool same;
ierr = PetscMalloc6(aintcount,&aints,bintcount,&bints,aaddrcount,&aaddrs,baddrcount,&baddrs,atypecount,&atypes,btypecount,&btypes);CHKERRQ(ierr);
ierr = MPI_Type_get_contents(atype,aintcount,aaddrcount,atypecount,aints,aaddrs,atypes);CHKERRQ(ierr);
ierr = MPI_Type_get_contents(btype,bintcount,baddrcount,btypecount,bints,baddrs,btypes);CHKERRQ(ierr);
ierr = PetscMemcmp(aints,bints,aintcount*sizeof(aints[0]),&same);CHKERRQ(ierr);
if (same) {
ierr = PetscMemcmp(aaddrs,baddrs,aaddrcount*sizeof(aaddrs[0]),&same);CHKERRQ(ierr);
if (same) {
/* Check for identity first */
ierr = PetscMemcmp(atypes,btypes,atypecount*sizeof(atypes[0]),&same);CHKERRQ(ierr);
if (!same) {
/* If the atype or btype were not predefined data types, then the types returned from MPI_Type_get_contents
* will merely be equivalent to the types used in the construction, so we must recursively compare. */
for (i=0; i<atypecount; i++) {
ierr = MPIPetsc_Type_compare(atypes[i],btypes[i],&same);CHKERRQ(ierr);
if (!same) break;
}
}
}
}
for (i=0; i<atypecount; i++) {
ierr = MPIPetsc_Type_free(&(atypes[i]));CHKERRQ(ierr);
ierr = MPIPetsc_Type_free(&(btypes[i]));CHKERRQ(ierr);
}
ierr = PetscFree6(aints,bints,aaddrs,baddrs,atypes,btypes);CHKERRQ(ierr);
if (same) *match = PETSC_TRUE;
}
free_types:
if (freeatype) {
ierr = MPIPetsc_Type_free(&atype);CHKERRQ(ierr);
}
if (freebtype) {
ierr = MPIPetsc_Type_free(&btype);CHKERRQ(ierr);
}
PetscFunctionReturn(0);
}
/*@C
PetscDTGaussJacobiQuadrature - create Gauss-Jacobi quadrature for a simplex
Not Collective
Input Arguments:
+ dim - The simplex dimension
. order - The number of points in one dimension
. a - left end of interval (often-1)
- b - right end of interval (often +1)
Output Argument:
. q - A PetscQuadrature object
Level: intermediate
References:
Karniadakis and Sherwin.
FIAT
.seealso: PetscDTGaussTensorQuadrature(), PetscDTGaussQuadrature()
@*/
PetscErrorCode PetscDTGaussJacobiQuadrature(PetscInt dim, PetscInt order, PetscReal a, PetscReal b, PetscQuadrature *q)
{
PetscInt npoints = dim > 1 ? dim > 2 ? order*PetscSqr(order) : PetscSqr(order) : order;
PetscReal *px, *wx, *py, *wy, *pz, *wz, *x, *w;
PetscInt i, j, k;
PetscErrorCode ierr;
PetscFunctionBegin;
if ((a != -1.0) || (b != 1.0)) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Must use default internal right now");
ierr = PetscMalloc1(npoints*dim, &x);CHKERRQ(ierr);
ierr = PetscMalloc1(npoints, &w);CHKERRQ(ierr);
switch (dim) {
case 0:
ierr = PetscFree(x);CHKERRQ(ierr);
ierr = PetscFree(w);CHKERRQ(ierr);
ierr = PetscMalloc1(1, &x);CHKERRQ(ierr);
ierr = PetscMalloc1(1, &w);CHKERRQ(ierr);
x[0] = 0.0;
w[0] = 1.0;
break;
case 1:
ierr = PetscDTGaussJacobiQuadrature1D_Internal(order, 0.0, 0.0, x, w);CHKERRQ(ierr);
break;
case 2:
ierr = PetscMalloc4(order,&px,order,&wx,order,&py,order,&wy);CHKERRQ(ierr);
ierr = PetscDTGaussJacobiQuadrature1D_Internal(order, 0.0, 0.0, px, wx);CHKERRQ(ierr);
ierr = PetscDTGaussJacobiQuadrature1D_Internal(order, 1.0, 0.0, py, wy);CHKERRQ(ierr);
for (i = 0; i < order; ++i) {
for (j = 0; j < order; ++j) {
ierr = PetscDTMapSquareToTriangle_Internal(px[i], py[j], &x[(i*order+j)*2+0], &x[(i*order+j)*2+1]);CHKERRQ(ierr);
w[i*order+j] = 0.5 * wx[i] * wy[j];
}
}
ierr = PetscFree4(px,wx,py,wy);CHKERRQ(ierr);
break;
case 3:
ierr = PetscMalloc6(order,&px,order,&wx,order,&py,order,&wy,order,&pz,order,&wz);CHKERRQ(ierr);
ierr = PetscDTGaussJacobiQuadrature1D_Internal(order, 0.0, 0.0, px, wx);CHKERRQ(ierr);
ierr = PetscDTGaussJacobiQuadrature1D_Internal(order, 1.0, 0.0, py, wy);CHKERRQ(ierr);
ierr = PetscDTGaussJacobiQuadrature1D_Internal(order, 2.0, 0.0, pz, wz);CHKERRQ(ierr);
for (i = 0; i < order; ++i) {
for (j = 0; j < order; ++j) {
for (k = 0; k < order; ++k) {
ierr = PetscDTMapCubeToTetrahedron_Internal(px[i], py[j], pz[k], &x[((i*order+j)*order+k)*3+0], &x[((i*order+j)*order+k)*3+1], &x[((i*order+j)*order+k)*3+2]);CHKERRQ(ierr);
w[(i*order+j)*order+k] = 0.125 * wx[i] * wy[j] * wz[k];
}
}
}
ierr = PetscFree6(px,wx,py,wy,pz,wz);CHKERRQ(ierr);
break;
default:
SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Cannot construct quadrature rule for dimension %d", dim);
}
ierr = PetscQuadratureCreate(PETSC_COMM_SELF, q);CHKERRQ(ierr);
ierr = PetscQuadratureSetData(*q, dim, npoints, x, w);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
/*@C
PetscDTGaussJacobiQuadrature - create Gauss-Jacobi quadrature for a simplex
Not Collective
Input Arguments:
+ dim - The simplex dimension
. npoints - number of points
. a - left end of interval (often-1)
- b - right end of interval (often +1)
Output Arguments:
+ points - quadrature points
- weights - quadrature weights
Level: intermediate
References:
Karniadakis and Sherwin.
FIAT
.seealso: PetscDTGaussQuadrature()
@*/
PetscErrorCode PetscDTGaussJacobiQuadrature(PetscInt dim, PetscInt npoints, PetscReal a, PetscReal b, PetscReal *points[], PetscReal *weights[])
{
PetscReal *px, *wx, *py, *wy, *pz, *wz, *x, *w;
PetscInt i, j, k;
PetscErrorCode ierr;
PetscFunctionBegin;
if ((a != -1.0) || (b != 1.0)) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Must use default internal right now");
switch (dim) {
case 1:
ierr = PetscMalloc(npoints * sizeof(PetscReal), &x);CHKERRQ(ierr);
ierr = PetscMalloc(npoints * sizeof(PetscReal), &w);CHKERRQ(ierr);
ierr = PetscDTGaussJacobiQuadrature1D_Internal(npoints, 0.0, 0.0, x, w);CHKERRQ(ierr);
break;
case 2:
ierr = PetscMalloc(npoints*npoints*2 * sizeof(PetscReal), &x);CHKERRQ(ierr);
ierr = PetscMalloc(npoints*npoints * sizeof(PetscReal), &w);CHKERRQ(ierr);
ierr = PetscMalloc4(npoints,PetscReal,&px,npoints,PetscReal,&wx,npoints,PetscReal,&py,npoints,PetscReal,&wy);CHKERRQ(ierr);
ierr = PetscDTGaussJacobiQuadrature1D_Internal(npoints, 0.0, 0.0, px, wx);CHKERRQ(ierr);
ierr = PetscDTGaussJacobiQuadrature1D_Internal(npoints, 1.0, 0.0, py, wy);CHKERRQ(ierr);
for (i = 0; i < npoints; ++i) {
for (j = 0; j < npoints; ++j) {
ierr = PetscDTMapSquareToTriangle_Internal(px[i], py[j], &x[(i*npoints+j)*2+0], &x[(i*npoints+j)*2+1]);CHKERRQ(ierr);
w[i*npoints+j] = 0.5 * wx[i] * wy[j];
}
}
ierr = PetscFree4(px,wx,py,wy);CHKERRQ(ierr);
break;
case 3:
ierr = PetscMalloc(npoints*npoints*3 * sizeof(PetscReal), &x);CHKERRQ(ierr);
ierr = PetscMalloc(npoints*npoints * sizeof(PetscReal), &w);CHKERRQ(ierr);
ierr = PetscMalloc6(npoints,PetscReal,&px,npoints,PetscReal,&wx,npoints,PetscReal,&py,npoints,PetscReal,&wy,npoints,PetscReal,&pz,npoints,PetscReal,&wz);CHKERRQ(ierr);
ierr = PetscDTGaussJacobiQuadrature1D_Internal(npoints, 0.0, 0.0, px, wx);CHKERRQ(ierr);
ierr = PetscDTGaussJacobiQuadrature1D_Internal(npoints, 1.0, 0.0, py, wy);CHKERRQ(ierr);
ierr = PetscDTGaussJacobiQuadrature1D_Internal(npoints, 2.0, 0.0, pz, wz);CHKERRQ(ierr);
for (i = 0; i < npoints; ++i) {
for (j = 0; j < npoints; ++j) {
for (k = 0; k < npoints; ++k) {
ierr = PetscDTMapCubeToTetrahedron_Internal(px[i], py[j], pz[k], &x[((i*npoints+j)*npoints+k)*3+0], &x[((i*npoints+j)*npoints+k)*3+1], &x[((i*npoints+j)*npoints+k)*3+2]);CHKERRQ(ierr);
w[(i*npoints+j)*npoints+k] = 0.125 * wx[i] * wy[j] * wz[k];
}
}
}
ierr = PetscFree6(px,wx,py,wy,pz,wz);CHKERRQ(ierr);
break;
default:
SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Cannot construct quadrature rule for dimension %d", dim);
}
if (points) *points = x;
if (weights) *weights = w;
PetscFunctionReturn(0);
}
PetscErrorCode MPIPetsc_Type_compare(MPI_Datatype a,MPI_Datatype b,PetscBool *match)
{
PetscErrorCode ierr;
MPI_Datatype atype,btype;
PetscMPIInt aintcount,aaddrcount,atypecount,acombiner;
PetscMPIInt bintcount,baddrcount,btypecount,bcombiner;
PetscBool freeatype, freebtype;
PetscFunctionBegin;
ierr = MPIPetsc_Type_unwrap(a,&atype,&freeatype);CHKERRQ(ierr);
ierr = MPIPetsc_Type_unwrap(b,&btype,&freebtype);CHKERRQ(ierr);
*match = PETSC_FALSE;
if (atype == btype) {
*match = PETSC_TRUE;
goto free_types;
}
ierr = MPI_Type_get_envelope(atype,&aintcount,&aaddrcount,&atypecount,&acombiner);CHKERRQ(ierr);
ierr = MPI_Type_get_envelope(btype,&bintcount,&baddrcount,&btypecount,&bcombiner);CHKERRQ(ierr);
if (acombiner == bcombiner && aintcount == bintcount && aaddrcount == baddrcount && atypecount == btypecount && (aintcount > 0 || aaddrcount > 0 || atypecount > 0)) {
PetscMPIInt *aints,*bints;
MPI_Aint *aaddrs,*baddrs;
MPI_Datatype *atypes,*btypes;
PetscInt i;
PetscBool same;
ierr = PetscMalloc6(aintcount,&aints,bintcount,&bints,aaddrcount,&aaddrs,baddrcount,&baddrs,atypecount,&atypes,btypecount,&btypes);CHKERRQ(ierr);
ierr = MPI_Type_get_contents(atype,aintcount,aaddrcount,atypecount,aints,aaddrs,atypes);CHKERRQ(ierr);
ierr = MPI_Type_get_contents(btype,bintcount,baddrcount,btypecount,bints,baddrs,btypes);CHKERRQ(ierr);
ierr = PetscMemcmp(aints,bints,aintcount*sizeof(aints[0]),&same);CHKERRQ(ierr);
if (same) {
ierr = PetscMemcmp(aaddrs,baddrs,aaddrcount*sizeof(aaddrs[0]),&same);CHKERRQ(ierr);
if (same) {
/* This comparison should be recursive */
ierr = PetscMemcmp(atypes,btypes,atypecount*sizeof(atypes[0]),&same);CHKERRQ(ierr);
}
}
for (i=0; i<atypecount; i++) {
ierr = MPIPetsc_Type_free(&(atypes[i]));CHKERRQ(ierr);
ierr = MPIPetsc_Type_free(&(btypes[i]));CHKERRQ(ierr);
}
ierr = PetscFree6(aints,bints,aaddrs,baddrs,atypes,btypes);CHKERRQ(ierr);
if (same) *match = PETSC_TRUE;
}
free_types:
if (freeatype) {
ierr = MPIPetsc_Type_free(&atype);CHKERRQ(ierr);
}
if (freebtype) {
ierr = MPIPetsc_Type_free(&btype);CHKERRQ(ierr);
}
PetscFunctionReturn(0);
}
PETSC_EXTERN PetscErrorCode MatColoringLocalColor(MatColoring mc,PetscSF etoc,PetscSF etor,PetscReal *wts,ISColoringValue *color, ISColoringValue *maxcolor)
{
PetscInt nrows,ncols,ncolentries,nrowentries,idx,neighoffset;
PetscInt i,j,k;
PetscInt dist = mc->dist;
PetscInt totalcolors;
PetscBool *colormask;
PetscErrorCode ierr;
PetscBool *rowseen,*colseen;
const PetscInt *rowdegrees;
PetscInt *rowoffsets;
const PetscInt *coldegrees;
PetscInt *coloffsets;
PetscInt offset;
PetscInt *ll_ptr;
PetscInt *ll_idx;
PetscReal *swts;
PetscInt *sidx;
PetscInt unused;
PetscInt rowlist,collist;
PetscInt swp;
PetscMPIInt rank;
const PetscSFNode *colentries,*rowentries;
PetscFunctionBegin;
ierr = MPI_Comm_rank(PetscObjectComm((PetscObject)mc),&rank);CHKERRQ(ierr);
ierr = PetscSFGetGraph(etoc,&ncols,&ncolentries,NULL,&colentries);CHKERRQ(ierr);
ierr = PetscSFGetGraph(etor,&nrows,&nrowentries,NULL,&rowentries);CHKERRQ(ierr);
ierr = PetscMalloc6(nrows,&rowseen,ncols,&colseen,ncols,&coloffsets,nrows,&rowoffsets,2*ncols,&ll_ptr,2*ncols,&ll_idx);CHKERRQ(ierr);
ierr = PetscMalloc2(ncols,&sidx,ncols,&swts);CHKERRQ(ierr);
ierr = PetscSFComputeDegreeBegin(etoc,&rowdegrees);CHKERRQ(ierr);
ierr = PetscSFComputeDegreeEnd(etoc,&rowdegrees);CHKERRQ(ierr);
ierr = PetscSFComputeDegreeBegin(etor,&coldegrees);CHKERRQ(ierr);
ierr = PetscSFComputeDegreeEnd(etor,&coldegrees);CHKERRQ(ierr);
/* sort by weight */
for (i=0;i<ncols;i++) {
sidx[i] = i;
swts[i] = wts[i];
}
ierr = PetscSortRealWithPermutation(ncols,swts,sidx);CHKERRQ(ierr);
for (i=0;i<ncols/2;i++) {
swp = sidx[i];
sidx[i] = sidx[ncols-1-i];
sidx[ncols-1-i] = swp;
}
/* set up the "unused" linked list */
unused = 0;
ll_ptr[2*ncols-1] = -1;
for (i=0;i<2*ncols-1;i++) {
ll_ptr[i] = i+1;
}
/* initialize the offsets */
offset=0;
for (i=0;i<ncols;i++) {
coloffsets[i] = offset;
offset+=coldegrees[i];
colseen[i] = PETSC_FALSE;
}
offset=0;
for (i=0;i<nrows;i++) {
rowoffsets[i] = offset;
offset+=rowdegrees[i];
rowseen[i] = PETSC_FALSE;
}
/* discover the maximum current color */
totalcolors = 1;
for (i=0;i<ncols;i++) {
if (color[i] > totalcolors-1 && color[i] != IS_COLORING_MAX) totalcolors = color[i]+1;
}
if (totalcolors < 10) totalcolors=10;
ierr = PetscMalloc(sizeof(PetscBool)*totalcolors,&colormask);CHKERRQ(ierr);
/* alternate between rows and columns to get the distance k minimum coloring */
for (i=0;i<ncols;i++) {
collist = -1;
rowlist = -1;
if (color[sidx[i]] == IS_COLORING_MAX) {
for (j=0;j<totalcolors;j++) colormask[j] = PETSC_FALSE;
swp = unused;
unused = ll_ptr[unused];
ll_ptr[swp] = collist;
ll_idx[swp] = sidx[i];
collist = swp;
colseen[sidx[i]] = PETSC_TRUE;
for (k=0;k<=dist;k++) {
if (k % 2 == 0) {
while (collist >= 0) {
if (k != dist) {
for (j=0;j<coldegrees[ll_idx[collist]];j++) {
neighoffset = coloffsets[ll_idx[collist]]+j;
idx = colentries[neighoffset].index;
if (colentries[neighoffset].rank == rank && !rowseen[idx]) {
swp = unused;
unused = ll_ptr[unused];
ll_ptr[swp] = rowlist;
ll_idx[swp] = idx;
rowlist = swp;
rowseen[idx] = PETSC_TRUE;
}
}
}
if (color[ll_idx[collist]] != IS_COLORING_MAX) colormask[color[ll_idx[collist]]] = PETSC_TRUE;
colseen[ll_idx[collist]] = PETSC_FALSE;
swp = collist;
collist = ll_ptr[collist];
ll_ptr[swp] = unused;
unused = swp;
}
} else {
while (rowlist >= 0) {
if (k != dist) {
for (j=0;j<rowdegrees[ll_idx[rowlist]];j++) {
neighoffset = rowoffsets[ll_idx[rowlist]]+j;
idx = rowentries[neighoffset].index;
if (rowentries[neighoffset].rank == rank && !colseen[idx]) {
swp = unused;
unused = ll_ptr[unused];
ll_ptr[swp] = collist;
ll_idx[swp] = idx;
collist = swp;
colseen[idx] = PETSC_TRUE;
}
}
}
if (color[ll_idx[rowlist]] != IS_COLORING_MAX) colormask[color[ll_idx[rowlist]]] = PETSC_TRUE;
rowseen[ll_idx[rowlist]] = PETSC_FALSE;
swp = rowlist;
rowlist = ll_ptr[rowlist];
ll_ptr[swp] = unused;
unused = swp;
}
}
}
color[sidx[i]] = totalcolors;
for (k=0;k<totalcolors;k++) {
if (!colormask[k]) {color[sidx[i]] = k; break;}
}
if (color[sidx[i]] >= mc->maxcolors && mc->maxcolors > 0) color[sidx[i]] = mc->maxcolors;
if (color[sidx[i]] > *maxcolor) *maxcolor = color[sidx[i]];
if (color[sidx[i]] > totalcolors-1) {
totalcolors *= 2;
ierr = PetscFree(colormask);CHKERRQ(ierr);
ierr = PetscMalloc(sizeof(PetscBool)*totalcolors,&colormask);CHKERRQ(ierr);
}
}
if (collist != -1) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_NOT_CONVERGED,"Likely error in local coloring BFS -- column queue still has %d\n",collist);
if (rowlist != -1) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_NOT_CONVERGED,"Likely error in local coloring BFS -- row queue still has %d\n",rowlist);
}
for (i=0;i<ncols;i++) {
if (colseen[i]) {SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_NOT_CONVERGED,"Likely error in local coloring BFS -- column %d still seen\n",i);}
}
for (i=0;i<nrows;i++) {
if (rowseen[i]) {SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_NOT_CONVERGED,"Likely error in local coloring BFS -- row %d still seen\n",i);}
}
ierr = PetscFree6(rowseen,colseen,coloffsets,rowoffsets,ll_ptr,ll_idx);CHKERRQ(ierr);
ierr = PetscFree2(sidx,swts);CHKERRQ(ierr);
ierr = PetscFree(colormask);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
PETSC_EXTERN PetscErrorCode MatColoringDiscoverBoundary(MatColoring mc,PetscSF etoc,PetscSF etor,PetscInt *nboundary,PetscInt **boundary)
{
PetscInt nrows,ncols,ncolentries,nrowentries,idx,bidx,neighoffset;
PetscInt i,j,k;
PetscInt dist = mc->dist;
PetscBool onBoundary;
PetscErrorCode ierr;
PetscBool *rowseen,*colseen;
const PetscInt *rowdegrees;
PetscInt *rowoffsets;
const PetscInt *coldegrees;
PetscInt *coloffsets;
PetscInt offset;
PetscInt *ll_ptr;
PetscInt *ll_idx;
PetscInt unused;
PetscInt rowlist,collist;
PetscInt swp;
PetscMPIInt rank;
const PetscSFNode *colentries,*rowentries;
PetscFunctionBegin;
*nboundary = 0;
ierr = MPI_Comm_rank(PetscObjectComm((PetscObject)mc),&rank);CHKERRQ(ierr);
ierr = PetscSFGetGraph(etoc,&ncols,&ncolentries,NULL,&colentries);CHKERRQ(ierr);
ierr = PetscSFGetGraph(etor,&nrows,&nrowentries,NULL,&rowentries);CHKERRQ(ierr);
ierr = PetscMalloc6(nrows,&rowseen,
ncols,&colseen,
ncols,&coloffsets,
nrows,&rowoffsets,
2*ncols,&ll_ptr,
2*ncols,&ll_idx);CHKERRQ(ierr);
ierr = PetscSFComputeDegreeBegin(etoc,&rowdegrees);CHKERRQ(ierr);
ierr = PetscSFComputeDegreeEnd(etoc,&rowdegrees);CHKERRQ(ierr);
ierr = PetscSFComputeDegreeBegin(etor,&coldegrees);CHKERRQ(ierr);
ierr = PetscSFComputeDegreeEnd(etor,&coldegrees);CHKERRQ(ierr);
/* set up the "unused" linked list -- double the size of the number of items as in tiny or large distance cases we may have a clique */
unused = 0;
ll_ptr[2*ncols-1] = -1;
for (i=0;i<2*ncols-1;i++) {
ll_ptr[i] = i+1;
}
/* initialize the offsets */
offset=0;
for (i=0;i<ncols;i++) {
coloffsets[i] = offset;
offset+=coldegrees[i];
colseen[i] = PETSC_FALSE;
}
offset=0;
for (i=0;i<nrows;i++) {
rowoffsets[i] = offset;
offset+=rowdegrees[i];
rowseen[i] = PETSC_FALSE;
}
/* count the number of boundary nodes */
for (i=0;i<ncols;i++) {
onBoundary = PETSC_FALSE;
collist = -1;
rowlist = -1;
swp = unused;
unused = ll_ptr[unused];
ll_ptr[swp] = collist;
ll_idx[swp] = i;
collist = swp;
colseen[i] = PETSC_TRUE;
for (k=0;k<=dist;k++) {
if (k % 2 == 0) {
while (collist >= 0) {
if (k != dist) {
for (j=0;j<coldegrees[ll_idx[collist]];j++) {
neighoffset = coloffsets[ll_idx[collist]]+j;
idx = colentries[neighoffset].index;
if (colentries[neighoffset].rank == rank) {
if (!rowseen[idx] && !onBoundary) {
swp = unused;
unused = ll_ptr[unused];
ll_ptr[swp] = rowlist;
rowlist = swp;
ll_idx[swp] = idx;
rowseen[idx] = PETSC_TRUE;
}
} else {
onBoundary = PETSC_TRUE;
}
}
}
colseen[ll_idx[collist]] = PETSC_FALSE;
swp = collist;
collist = ll_ptr[collist];
ll_ptr[swp] = unused;
unused = swp;
}
} else {
while (rowlist >= 0) {
if (k != dist) {
for (j=0;j<rowdegrees[ll_idx[rowlist]];j++) {
neighoffset = rowoffsets[ll_idx[rowlist]]+j;
if (rowentries[neighoffset].rank == rank) {
idx = rowentries[neighoffset].index;
if (!colseen[idx] && !onBoundary) {
swp = unused;
unused = ll_ptr[unused];
ll_ptr[swp] = collist;
ll_idx[swp] = idx;
colseen[idx] = PETSC_TRUE;
collist = swp;
}
} else {
onBoundary = PETSC_TRUE;
}
}
}
rowseen[ll_idx[rowlist]] = PETSC_FALSE;
swp = rowlist;
rowlist = ll_ptr[rowlist];
ll_ptr[swp] = unused;
unused = swp;
}
}
}
if (onBoundary) {(*nboundary)++;}
if (collist != -1) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_NOT_CONVERGED,"Likely error in boundary count BFS -- column queue still has %d\n",collist);
if (rowlist != -1) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_NOT_CONVERGED,"Likely error in boundary count BFS -- row queue still has %d\n",collist);
}
for (i=0;i<ncols;i++) {
if (colseen[i]) {SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_NOT_CONVERGED,"Likely error in boundary count BFS -- column %d still seen\n",i);}
}
for (i=0;i<nrows;i++) {
if (rowseen[i]) {SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_NOT_CONVERGED,"Likely error in boundary count BFS -- row %d still seen\n",i);}
}
ierr = PetscMalloc(sizeof(PetscInt)*(*nboundary),boundary);CHKERRQ(ierr);
/* set the boundary nodes */
bidx=0;
for (i=0;i<ncols;i++) {
onBoundary = PETSC_FALSE;
collist = -1;
rowlist = -1;
swp = unused;
unused = ll_ptr[unused];
ll_ptr[swp] = collist;
ll_idx[swp] = i;
collist = swp;
colseen[i] = PETSC_TRUE;
for (k=0;k<=dist;k++) {
if (k % 2 == 0) {
while (collist >= 0) {
if (k != dist) {
for (j=0;j<coldegrees[ll_idx[collist]];j++) {
neighoffset = coloffsets[ll_idx[collist]]+j;
idx = colentries[neighoffset].index;
if (colentries[neighoffset].rank == rank) {
if (!rowseen[idx] && !onBoundary) {
swp = unused;
unused = ll_ptr[unused];
ll_ptr[swp] = rowlist;
rowlist = swp;
ll_idx[swp] = idx;
rowseen[idx] = PETSC_TRUE;
}
} else {
onBoundary = PETSC_TRUE;
}
}
}
colseen[ll_idx[collist]] = PETSC_FALSE;
swp = collist;
collist = ll_ptr[collist];
ll_ptr[swp] = unused;
unused = swp;
}
} else {
while (rowlist >= 0) {
if (k != dist) {
for (j=0;j<rowdegrees[ll_idx[rowlist]];j++) {
neighoffset = rowoffsets[ll_idx[rowlist]]+j;
if (rowentries[neighoffset].rank == rank) {
idx = rowentries[neighoffset].index;
if (!colseen[idx] && !onBoundary) {
swp = unused;
unused = ll_ptr[unused];
ll_ptr[swp] = collist;
ll_idx[swp] = idx;
colseen[idx] = PETSC_TRUE;
collist = swp;
}
} else {
onBoundary = PETSC_TRUE;
}
}
}
rowseen[ll_idx[rowlist]] = PETSC_FALSE;
swp = rowlist;
rowlist = ll_ptr[rowlist];
ll_ptr[swp] = unused;
unused = swp;
}
}
}
if (onBoundary) {(*boundary)[bidx] = i; bidx++;}
}
for (i=0;i<ncols;i++) {
if (colseen[i]) {SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_NOT_CONVERGED,"Likely error in boundary set BFS -- column %d still seen\n",i);}
}
for (i=0;i<nrows;i++) {
if (rowseen[i]) {SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_NOT_CONVERGED,"Likely error in boundary set BFS -- row %d still seen\n",i);}
}
if (bidx != *nboundary) {SETERRQ(PetscObjectComm((PetscObject)mc),PETSC_ERR_NOT_CONVERGED,"Number of boundary nodes not matched");}
ierr = PetscFree6(rowseen,colseen,coloffsets,rowoffsets,ll_ptr,ll_idx);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
