Actual source code: ex1.c

petsc-3.12.1 2019-10-22
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  1: /*
  2:        Formatted test for ISGeneral routines.
  3: */

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

  7:  #include <petscis.h>
  8:  #include <petscviewer.h>

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

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

 23:   /*
 24:      Test IS of size 0
 25:   */
 26:   ISCreateGeneral(PETSC_COMM_SELF,0,&n,PETSC_COPY_VALUES,&is);
 27:   ISGetSize(is,&n);
 28:   if (n != 0) SETERRQ(PETSC_COMM_SELF,1,"ISGetSize");
 29:   ISDestroy(&is);

 31:   /*
 32:      Create large IS and test ISGetIndices()
 33:   */
 34:   n    = 10000 + rank;
 35:   PetscMalloc1(n,&indices);
 36:   for (i=0; i<n; i++) indices[i] = rank + i;
 37:   ISCreateGeneral(PETSC_COMM_SELF,n,indices,PETSC_COPY_VALUES,&is);
 38:   ISGetIndices(is,&ii);
 39:   for (i=0; i<n; i++) {
 40:     if (ii[i] != indices[i]) SETERRQ(PETSC_COMM_SELF,1,"ISGetIndices");
 41:   }
 42:   ISRestoreIndices(is,&ii);

 44:   /*
 45:      Check identity and permutation
 46:   */
 47:   ISPermutation(is,&flg);
 48:   if (flg) SETERRQ(PETSC_COMM_SELF,1,"ISPermutation");
 49:   ISIdentity(is,&flg);
 50:   if (!flg) SETERRQ(PETSC_COMM_SELF,1,"ISIdentity");
 51:   ISSetPermutation(is);
 52:   ISSetIdentity(is);
 53:   ISPermutation(is,&flg);
 54:   if (!flg) SETERRQ(PETSC_COMM_SELF,1,"ISPermutation");
 55:   ISIdentity(is,&flg);
 56:   if (!flg) SETERRQ(PETSC_COMM_SELF,1,"ISIdentity");

 58:   /*
 59:      Check equality of index sets
 60:   */
 61:   ISEqual(is,is,&flg);
 62:   if (!flg) SETERRQ(PETSC_COMM_SELF,1,"ISEqual");

 64:   /*
 65:      Sorting
 66:   */
 67:   ISSort(is);
 68:   ISSorted(is,&flg);
 69:   if (!flg) SETERRQ(PETSC_COMM_SELF,1,"ISSort");

 71:   /*
 72:      Thinks it is a different type?
 73:   */
 74:   PetscObjectTypeCompare((PetscObject)is,ISSTRIDE,&flg);
 75:   if (flg) SETERRQ(PETSC_COMM_SELF,1,"ISStride");
 76:   PetscObjectTypeCompare((PetscObject)is,ISBLOCK,&flg);
 77:   if (flg) SETERRQ(PETSC_COMM_SELF,1,"ISBlock");

 79:   ISDestroy(&is);

 81:   /*
 82:      Inverting permutation
 83:   */
 84:   for (i=0; i<n; i++) indices[i] = n - i - 1;
 85:   ISCreateGeneral(PETSC_COMM_SELF,n,indices,PETSC_COPY_VALUES,&is);
 86:   PetscFree(indices);
 87:   ISSetPermutation(is);
 88:   ISInvertPermutation(is,PETSC_DECIDE,&newis);
 89:   ISGetIndices(newis,&ii);
 90:   for (i=0; i<n; i++) {
 91:     if (ii[i] != n - i - 1) SETERRQ(PETSC_COMM_SELF,1,"ISInvertPermutation");
 92:   }
 93:   ISRestoreIndices(newis,&ii);
 94:   ISDestroy(&newis);
 95:   ISDestroy(&is);
 96:   PetscFinalize();
 97:   return ierr;
 98: }

100: /*TEST

102:    test:

104: TEST*/