Actual source code: ex6.c


  2: static char help[] = "Tests ISComplement().\n\n";

  4: #include <petscis.h>
  5: #include <petscviewer.h>

  7: int main(int argc,char **argv)
  8: {
  9:   PetscMPIInt    rank,size;
 10:   PetscInt       i,j,n,cnt=0,rstart,rend;
 11:   PetscBool      flg;
 12:   IS             is[2],isc;

 14:   PetscInitialize(&argc,&argv,(char*)0,help);
 15:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 16:   MPI_Comm_size(PETSC_COMM_WORLD,&size);

 18:   n      = 3*size;              /* Number of local indices, same on each process. */
 19:   rstart = 3*(size+2)*rank;     /* start of local range */
 20:   rend   = 3*(size+2)*(rank+1); /* end of local range */
 21:   for (i=0; i<2; i++) {
 22:     ISCreate(PETSC_COMM_WORLD,&is[i]);
 23:     ISSetType(is[i],ISGENERAL);
 24:   }
 25:   {
 26:     PetscBool *mask;

 28:     PetscCalloc1(rend-rstart,&mask);
 29:     for (i=0; i<3; i++) {
 30:       for (j=0; j<size; j++) {
 31:         mask[i*(size+2)+j] = PETSC_TRUE;
 32:       }
 33:     }
 34:     ISGeneralSetIndicesFromMask(is[0],rstart,rend,mask);
 35:     PetscFree(mask);
 36:   }
 37:   {
 38:     PetscInt *indices;

 40:     PetscMalloc1(n,&indices);
 41:     for (i=0; i<3; i++) {
 42:       for (j=0; j<size; j++) indices[cnt++] = rstart+i*(size+2)+j;
 43:     }
 45:     ISGeneralSetIndices(is[1],n,indices,PETSC_COPY_VALUES);
 46:     PetscFree(indices);
 47:   }

 49:   ISEqual(is[0],is[1],&flg);

 52:   ISComplement(is[0],rstart,rend,&isc);
 53:   ISView(is[0],PETSC_VIEWER_STDOUT_WORLD);
 54:   ISView(isc,PETSC_VIEWER_STDOUT_WORLD);

 56:   for (i=0; i<2; i++) ISDestroy(&is[i]);
 57:   ISDestroy(&isc);
 58:   PetscFinalize();
 59:   return 0;
 60: }

 62: /*TEST

 64:    test:
 65:       suffix: 3
 66:       nsize: 3

 68: TEST*/