Actual source code: ex1.c

  1: /*
  2:        Formatted test for ISGeneral routines.
  3: */

  5: static char help[] = "Tests IS general routines.\n\n";

 7:  #include petscis.h

 11: int main(int argc,char **argv)
 12: {
 13:   PetscMPIInt    rank,size;
 14:   PetscInt       i,n,*indices;
 15:   const PetscInt *ii;
 16:   IS             is,newis;
 17:   PetscTruth     flg;

 20:   PetscInitialize(&argc,&argv,(char*)0,help);
 21:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 22:   MPI_Comm_size(PETSC_COMM_WORLD,&size);

 24:   /*
 25:      Test IS of size 0 
 26:   */
 27:   ISCreateGeneral(PETSC_COMM_SELF,0,&n,&is);
 28:   ISGetSize(is,&n);
 29:   if (n != 0) SETERRQ(1,"ISGetSize");
 30:   ISDestroy(is);

 32:   /*
 33:      Create large IS and test ISGetIndices()
 34:   */
 35:   n = 10000 + rank;
 36:   PetscMalloc(n*sizeof(PetscInt),&indices);
 37:   for (i=0; i<n; i++) {
 38:     indices[i] = rank + i;
 39:   }
 40:   ISCreateGeneral(PETSC_COMM_SELF,n,indices,&is);
 41:   ISGetIndices(is,&ii);
 42:   for (i=0; i<n; i++) {
 43:     if (ii[i] != indices[i]) SETERRQ(1,"ISGetIndices");
 44:   }
 45:   ISRestoreIndices(is,&ii);

 47:   /* 
 48:      Check identity and permutation 
 49:   */
 50:   ISPermutation(is,&flg);
 51:   if (flg) SETERRQ(1,"ISPermutation");
 52:   ISIdentity(is,&flg);
 53:   if (!flg) SETERRQ(1,"ISIdentity");
 54:   ISSetPermutation(is);
 55:   ISSetIdentity(is);
 56:   ISPermutation(is,&flg);
 57:   if (!flg) SETERRQ(1,"ISPermutation");
 58:   ISIdentity(is,&flg);
 59:   if (!flg) SETERRQ(1,"ISIdentity");

 61:   /*
 62:      Check equality of index sets 
 63:   */
 64:   ISEqual(is,is,&flg);
 65:   if (!flg) SETERRQ(1,"ISEqual");

 67:   /*
 68:      Sorting 
 69:   */
 70:   ISSort(is);
 71:   ISSorted(is,&flg);
 72:   if (!flg) SETERRQ(1,"ISSort");

 74:   /*
 75:      Thinks it is a different type?
 76:   */
 77:   ISStride(is,&flg);
 78:   if (flg) SETERRQ(1,"ISStride");
 79:   ISBlock(is,&flg);
 80:   if (flg) SETERRQ(1,"ISBlock");

 82:   ISDestroy(is);

 84:   /*
 85:      Inverting permutation
 86:   */
 87:   for (i=0; i<n; i++) {
 88:     indices[i] = n - i - 1;
 89:   }
 90:   ISCreateGeneral(PETSC_COMM_SELF,n,indices,&is);
 91:   PetscFree(indices);
 92:   ISSetPermutation(is);
 93:   ISInvertPermutation(is,PETSC_DECIDE,&newis);
 94:   ISGetIndices(newis,&ii);
 95:   for (i=0; i<n; i++) {
 96:     if (ii[i] != n - i - 1) SETERRQ(1,"ISInvertPermutation");
 97:   }
 98:   ISRestoreIndices(newis,&ii);
 99:   ISDestroy(newis);
100:   ISDestroy(is);
101:   PetscFinalize();
102:   return 0;
103: }
104: