Actual source code: ex173.c

  1: static char help[] = "Test MatrixMarket outputting.\n\n";

  3: /*
  4:   Include "petscmat.h" so that we can use matrices.
  5:   automatically includes:
  6:      petscsys.h    - base PETSc routines   petscvec.h    - vectors
  7:      petscmat.h    - matrices
  8:      petscis.h     - index sets            petscviewer.h - viewers
  9: */

 11: #include <petscmat.h>

 13: int main(int argc, char **args)
 14: {
 15:   Mat         A;
 16:   PetscViewer fd;                       /* viewer */
 17:   char        file[PETSC_MAX_PATH_LEN]; /* input file name */
 18:   PetscBool   flg;

 20:   PetscFunctionBeginUser;
 21:   PetscCall(PetscInitialize(&argc, &args, (char *)0, help));
 22:   PetscCall(PetscOptionsGetString(NULL, NULL, "-f0", file, sizeof(file), &flg));
 23:   PetscCheck(flg, PETSC_COMM_WORLD, PETSC_ERR_USER, "Must indicate binary file with the -f0 option");
 24:   PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &fd));
 25:   PetscCall(MatCreate(PETSC_COMM_WORLD, &A));
 26:   PetscCall(MatLoad(A, fd));
 27:   PetscCall(PetscViewerDestroy(&fd));

 29:   PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_ASCII_MATRIXMARKET));
 30:   PetscCall(MatView(A, PETSC_VIEWER_STDOUT_WORLD));
 31:   PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD));
 32:   PetscCall(MatDestroy(&A));
 33:   PetscCall(PetscFinalize());
 34:   return 0;
 35: }

 37: /*TEST

 39:    test:
 40:       args: -f0 ${wPETSC_DIR}/share/petsc/datafiles/matrices/ns-real-int32-float64
 41:       requires: !complex double !defined(PETSC_USE_64BIT_INDICES)

 43: TEST*/