Actual source code: ex47.c

petsc-3.7.5 2017-01-01
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  2: static char help[] = "Tests PetscViewerHDF5 VecView()/VecLoad() function.\n\n";

  4: #include <petscviewer.h>
  5: #include <petscviewerhdf5.h>
  6: #include <petscvec.h>

 10: int main(int argc,char **args)
 11: {
 13:   Vec            x,y;
 14:   PetscReal      norm,dnorm;
 15:   PetscViewer    H5viewer;

 17:   PetscInitialize(&argc,&args,(char*)0,help);
 18:   VecCreate(PETSC_COMM_WORLD,&x);
 19:   VecSetFromOptions(x);
 20:   VecSetSizes(x,11,PETSC_DETERMINE);
 21:   VecSet(x,22.3);

 23:   PetscViewerHDF5Open(PETSC_COMM_WORLD,"x.h5",FILE_MODE_WRITE,&H5viewer);
 24:   PetscViewerSetFromOptions(H5viewer);

 26:   /* Write the Vec without one extra dimension for BS */
 27:   PetscViewerHDF5SetBaseDimension2(H5viewer, PETSC_FALSE);
 28:   PetscObjectSetName((PetscObject) x, "noBsDim");
 29:   VecView(x,H5viewer);

 31:   /* Write the Vec with one extra, 1-sized, dimension for BS */
 32:   PetscViewerHDF5SetBaseDimension2(H5viewer, PETSC_TRUE);
 33:   PetscObjectSetName((PetscObject) x, "bsDim");
 34:   VecView(x,H5viewer);

 36:   PetscViewerDestroy(&H5viewer);
 37:   VecDuplicate(x,&y);

 39:   /* Create the HDF5 viewer for reading */
 40:   PetscViewerHDF5Open(PETSC_COMM_WORLD,"x.h5",FILE_MODE_READ,&H5viewer);
 41:   PetscViewerSetFromOptions(H5viewer);

 43:   /* Load the Vec without the BS dim and compare */
 44:   PetscObjectSetName((PetscObject) y, "noBsDim");
 45:   VecLoad(y,H5viewer);
 46:   VecAXPY(y,-1.0,x);
 47:   VecNorm(y,NORM_2,&norm);
 48:   VecNorm(x,NORM_2,&dnorm);
 49:   if (norm/dnorm > 1.e-6) SETERRQ1(PETSC_COMM_WORLD,PETSC_ERR_PLIB,"Vec read in 'noBsDim' does not match vector written out %g",(double)(norm/dnorm));

 51:   /* Load the Vec with one extra, 1-sized, BS dim and compare */
 52:   PetscObjectSetName((PetscObject) y, "bsDim");
 53:   VecLoad(y,H5viewer);
 54:   VecAXPY(y,-1.0,x);
 55:   VecNorm(y,NORM_2,&norm);
 56:   VecNorm(x,NORM_2,&dnorm);
 57:   if (norm/dnorm > 1.e-6) SETERRQ1(PETSC_COMM_WORLD,PETSC_ERR_PLIB,"Vec read in 'bsDim' does not match vector written out %g",(double)(norm/dnorm));

 59:   PetscViewerDestroy(&H5viewer);
 60:   VecDestroy(&y);
 61:   VecDestroy(&x);
 62:   PetscFinalize();
 63:   return 0;
 64: }