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Error.cc
1 //STARTHEADER
2 // $Id: Error.cc 2687 2011-11-14 11:17:51Z soyez $
3 //
4 // Copyright (c) 2005-2011, Matteo Cacciari, Gavin P. Salam and Gregory Soyez
5 //
6 //----------------------------------------------------------------------
7 // This file is part of FastJet.
8 //
9 // FastJet is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 2 of the License, or
12 // (at your option) any later version.
13 //
14 // The algorithms that underlie FastJet have required considerable
15 // development and are described in hep-ph/0512210. If you use
16 // FastJet as part of work towards a scientific publication, please
17 // include a citation to the FastJet paper.
18 //
19 // FastJet is distributed in the hope that it will be useful,
20 // but WITHOUT ANY WARRANTY; without even the implied warranty of
21 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 // GNU General Public License for more details.
23 //
24 // You should have received a copy of the GNU General Public License
25 // along with FastJet. If not, see <http://www.gnu.org/licenses/>.
26 //----------------------------------------------------------------------
27 //ENDHEADER
28 
29 #include "fastjet/Error.hh"
30 #include "fastjet/config.h"
31 #include <sstream>
32 
33 // printing the stack would need execinfo
34 #ifdef FASTJET_HAVE_EXECINFO_H
35 #include <execinfo.h>
36 #include <cstdlib>
37 #endif
38 
39 FASTJET_BEGIN_NAMESPACE // defined in fastjet/internal/base.hh
40 
41 using namespace std;
42 
43 bool Error::_print_errors = true;
44 bool Error::_print_backtrace = false;
45 ostream * Error::_default_ostr = & cerr;
46 
47 Error::Error(const std::string & message_in) {
48  _message = message_in;
49  if (_print_errors && _default_ostr){
50  ostringstream oss;
51  oss << "fastjet::Error: "<< message_in << endl;
52 
53  // only print the stack if execinfo is available and stack enabled
54 #ifdef FASTJET_HAVE_EXECINFO_H
55  if (_print_backtrace){
56  void * array[10];
57  char ** messages;
58 
59  int size = backtrace(array, 10);
60  messages = backtrace_symbols(array, size);
61 
62  oss << "stack:" << endl;
63  for (int i = 1; i < size && messages != NULL; ++i){
64  oss << " #" << i << ": " << messages[i] << endl;
65  }
66  free(messages);
67  }
68 #endif
69 
70  *_default_ostr << oss.str();
71  // get something written to file even
72  // if the program aborts
73  _default_ostr->flush();
74 
75  // // output error message either to cerr or to the user-set stream
76  // if (_default_ostr) { *_default_ostr << oss.str();
77  // // get something written to file even
78  // // if the program aborts
79  // _default_ostr->flush(); }
80  // else { std::cerr << oss.str(); }
81 
82  }
83 }
84 
85 FASTJET_END_NAMESPACE
86