1: static char help[] = "Tests MatConvert() from MATAIJ to MATSELL across multiple processes.\n\n";

  3: #include <petscmat.h>

  5: int main(int argc, char **args)
  6: {
  7:   Mat         A, B;
  8:   PetscViewer viewer;
  9:   PetscBool   flg;
 10:   char        file[PETSC_MAX_PATH_LEN];

 12:   PetscFunctionBeginUser;
 13:   PetscCall(PetscInitialize(&argc, &args, NULL, help));
 14:   PetscCall(PetscOptionsGetString(NULL, NULL, "-f", file, sizeof(file), &flg));
 15:   PetscCheck(flg, PETSC_COMM_WORLD, PETSC_ERR_USER, "Must indicate binary file with the -f option");
 16:   PetscCall(MatCreate(PETSC_COMM_WORLD, &A));
 17:   PetscCall(MatSetType(A, MATAIJ));
 18:   PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &viewer));
 19:   PetscCall(MatLoad(A, viewer));
 20:   PetscCall(PetscViewerDestroy(&viewer));

 22:   PetscCall(MatConvert(A, MATSELL, MAT_INITIAL_MATRIX, &B));
 23:   PetscCall(MatMultEqual(A, B, 10, &flg));
 24:   PetscCheck(flg, PETSC_COMM_WORLD, PETSC_ERR_PLIB, "MatMult() differs between MATAIJ and converted MATSELL");
 25:   PetscCall(MatMultAddEqual(A, B, 10, &flg));
 26:   PetscCheck(flg, PETSC_COMM_WORLD, PETSC_ERR_PLIB, "MatMultAdd() differs between MATAIJ and converted MATSELL");

 28:   PetscCall(MatDestroy(&A));
 29:   PetscCall(MatDestroy(&B));
 30:   PetscCall(PetscFinalize());
 31:   return 0;
 32: }

 34: /*TEST

 36:    build:
 37:       requires: !complex !defined(PETSC_USE_64BIT_INDICES) double

 39:    test:
 40:       nsize: 2
 41:       args: -f ${wPETSC_DIR}/share/petsc/datafiles/matrices/spd-real-int32-float64
 42:       output_file: output/empty.out

 44: TEST*/