Reference documentation for deal.II version 9.4.1
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exceptions.cc
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1// ---------------------------------------------------------------------
2//
3// Copyright (C) 2016 - 2022 by the deal.II authors
4//
5// This file is part of the deal.II library.
6//
7// The deal.II library is free software; you can use it, redistribute
8// it, and/or modify it under the terms of the GNU Lesser General
9// Public License as published by the Free Software Foundation; either
10// version 2.1 of the License, or (at your option) any later version.
11// The full text of the license can be found in the file LICENSE.md at
12// the top level directory of deal.II.
13//
14// ---------------------------------------------------------------------
15
16#include <deal.II/base/config.h>
17
19
20#ifdef DEAL_II_WITH_PETSC
21# include <petscconf.h>
22# include <petscsys.h>
23#endif // DEAL_II_WITH_PETSC
24
26
27namespace LACExceptions
28{
29 ExcPETScError::ExcPETScError(const int error_code)
30 : error_code(error_code)
31 {}
32
33 void
34 ExcPETScError::print_info(std::ostream &out) const
35 {
36 out << "deal.II encountered an error while calling a PETSc function."
37 << std::endl;
38#ifdef DEAL_II_WITH_PETSC
39 // PetscErrorMessage changes the value in a pointer to refer to a
40 // statically allocated description of the current error message.
41 const char * petsc_message;
42 const PetscErrorCode ierr = PetscErrorMessage(error_code,
43 &petsc_message,
44 /*specific=*/nullptr);
45 if (ierr == 0 && petsc_message != nullptr)
46 {
47 out << "The description of the error provided by PETSc is \""
48 << petsc_message << "\"." << std::endl;
49 }
50 else
51 {
52 out
53 << "PETSc was not able to determine a description for this particular error code."
54 << std::endl;
55 }
56#endif // DEAL_II_WITH_PETSC
57 out << "The numerical value of the original error code is " << error_code
58 << '.' << std::endl;
59 }
60} // namespace LACExceptions
61
virtual void print_info(std::ostream &out) const override
Definition: exceptions.cc:34
ExcPETScError(const int error_code)
Definition: exceptions.cc:29
#define DEAL_II_NAMESPACE_OPEN
Definition: config.h:442
#define DEAL_II_NAMESPACE_CLOSE
Definition: config.h:443