Actual source code: ex6.c
petsc-3.12.1 2019-10-22
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,*indices;
11: IS is,isc;
14: PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr;
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: PetscMalloc1(n,&indices);
22: for (i=0; i<3; i++) {
23: for (j=0; j<size; j++) indices[cnt++] = rstart+i*(size+2)+j;
24: }
25: if (cnt != n) SETERRQ(PETSC_COMM_SELF,1,"inconsistent count");
26: ISCreateGeneral(PETSC_COMM_WORLD,n,indices,PETSC_COPY_VALUES,&is);
27: PetscFree(indices);
28: ISComplement(is,rstart,rend,&isc);
29: ISView(is,PETSC_VIEWER_STDOUT_WORLD);
30: ISView(isc,PETSC_VIEWER_STDOUT_WORLD);
32: ISDestroy(&is);
33: ISDestroy(&isc);
34: PetscFinalize();
35: return ierr;
36: }
39: /*TEST
41: test:
42: suffix: 3
43: nsize: 3
45: TEST*/