Actual source code: ex3.c


  2: static char help[] = "Tests catching of floating point exceptions.\n\n";

  4: #include <petscsys.h>

  6: int CreateError(PetscReal x)
  7: {
  8:   x = 1.0 / x;
  9:   PetscPrintf(PETSC_COMM_SELF, "x = %g\n", (double)x);
 10:   return 0;
 11: }

 13: int main(int argc, char **argv)
 14: {
 16:   PetscInitialize(&argc, &argv, (char *)0, help);
 17:   PetscPrintf(PETSC_COMM_SELF, "This is a contrived example to test floating pointing\n");
 18:   PetscPrintf(PETSC_COMM_SELF, "It is not a true error.\n");
 19:   PetscPrintf(PETSC_COMM_SELF, "Run with -fp_trap to catch the floating point error\n");
 20:   CreateError(0.0);
 21:   return 0;
 22: }

 24: /*

 26:     Because this example may produce different output on different machines we filter out everything.
 27:     This makes the test ineffective but currently we don't have a good way to know which machines should handle
 28:     the floating point exceptions properly.

 30: */
 31: /*TEST

 33:    test:
 34:       args: -fp_trap -error_output_stdout
 35:       filter: Error: true

 37: TEST*/