Actual source code: ex15.c

petsc-3.12.1 2019-10-22
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  2: static char help[] = "Tests VecSetValuesBlocked() on sequential vectors.\n\n";

  4:  #include <petscvec.h>

  6: int main(int argc,char **argv)
  7: {
  9:   PetscMPIInt    size;
 10:   PetscInt       n = 9,bs = 3,indices[2],i;
 11:   PetscScalar    values[6];
 12:   Vec            x;

 14:   PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr;
 15:   MPI_Comm_size(PETSC_COMM_WORLD,&size);

 17:   if (size != 1) SETERRQ(PETSC_COMM_SELF,1,"Must be run with one processor");

 19:   /* create vector */
 20:   VecCreate(PETSC_COMM_SELF,&x);
 21:   VecSetSizes(x,n,n);
 22:   VecSetBlockSize(x,bs);
 23:   VecSetType(x,VECSEQ);

 25:   for (i=0; i<6; i++) values[i] = 4.0*i;
 26:   indices[0] = 0;
 27:   indices[1] = 2;

 29:   VecSetValuesBlocked(x,2,indices,values,INSERT_VALUES);
 30:   VecAssemblyBegin(x);
 31:   VecAssemblyEnd(x);

 33:   /*
 34:       Resulting vector should be 0 4 8  0 0 0 12 16 20
 35:   */
 36:   VecView(x,PETSC_VIEWER_STDOUT_WORLD);

 38:   /* test insertion with negative indices */
 39:   VecSetOption(x,VEC_IGNORE_NEGATIVE_INDICES,PETSC_TRUE);
 40:   for (i=0; i<6; i++) values[i] = -4.0*i;
 41:   indices[0] = -1;
 42:   indices[1] = 2;

 44:   VecSetValuesBlocked(x,2,indices,values,ADD_VALUES);
 45:   VecAssemblyBegin(x);
 46:   VecAssemblyEnd(x);

 48:   /*
 49:       Resulting vector should be 0 4 8  0 0 0 0 0 0
 50:   */
 51:   VecView(x,PETSC_VIEWER_STDOUT_WORLD);

 53:   VecDestroy(&x);

 55:   PetscFinalize();
 56:   return ierr;
 57: }



 61: /*TEST

 63:    test:

 65: TEST*/