Kea  2.1.6-git
exceptions/exceptions.cc
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1 // Copyright (C) 2009-2015 Internet Systems Consortium, Inc. ("ISC")
2 //
3 // This Source Code Form is subject to the terms of the Mozilla Public
4 // License, v. 2.0. If a copy of the MPL was not distributed with this
5 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
6 
7 #include <config.h>
8 
9 #include <string>
10 #include <sstream>
11 #include <exceptions/exceptions.h>
12 
13 using isc::Exception;
14 
15 namespace isc {
16 
17 Exception::Exception(const char* file, size_t line, const char* what)
18 : file_(file), line_(line), what_(what) {
19  std::stringstream location;
20  location << what_ << "[" << file_ << ":" << line_ << "]";
21  verbose_what_ = location.str();
22 }
23 
24 Exception::Exception(const char* file, size_t line, const std::string& what)
25  : file_(file), line_(line), what_(what) {
26  std::stringstream location;
27  location << what_ << "[" << file_ << ":" << line_ << "]";
28  verbose_what_ = location.str();
29 }
30 
31 const char*
32 Exception::what() const throw() {
33  return (what(false));
34 }
35 
36 const char*
37 Exception::what(bool verbose) const throw() {
38 
39  // Even though it's very unlikely that c_str() throws an exception,
40  // it's still not 100% guaranteed. To meet the exception specification
41  // of this function, we catch any unexpected exception and fall back to
42  // the pre-defined constant.
43  try {
44  if (verbose) {
45  return (verbose_what_.c_str());
46  } else {
47  return (what_.c_str());
48  }
49  } catch (...) {
50  // no exception handling is necessary. just have to catch exceptions.
51  }
52  return ("isc::Exception");
53 }
54 
55 }
virtual const char * what() const
Returns a C-style character string of the cause of the exception.
Exception(const char *file, size_t line, const char *what)
Constructor for a given type for exceptions with file name and file line number.
This is a base class for exceptions thrown from the DNS library module.
Defines the logger used by the top-level component of kea-lfc.