system_error.cc revision 1.1.1.1.8.2 
1// <system_error> implementation file
2
3// Copyright (C) 2007-2013 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
23// <http://www.gnu.org/licenses/>.
24
25
26#include <cstring>
27#include <system_error>
28#include <bits/functexcept.h>
29#include <limits>
30
31namespace
32{
33  using std::string;
34
35  struct generic_error_category : public std::error_category
36  {
37    virtual const char*
38    name() const noexcept
39    { return "generic"; }
40
41    virtual string
42    message(int i) const
43    {
44      // XXX locale issues: how does one get or set loc.
45      // _GLIBCXX_HAVE_STRERROR_L, strerror_l(i, cloc)
46      return string(strerror(i));
47    }
48  };
49
50  struct system_error_category : public std::error_category
51  {
52    virtual const char*
53    name() const noexcept
54    { return "system"; }
55
56    virtual string
57    message(int i) const
58    {
59      // XXX locale issues: how does one get or set loc.
60      // _GLIBCXX_HAVE_STRERROR_L, strerror_l(i, cloc)
61      return string(strerror(i));
62    }
63  };
64
65  const generic_error_category generic_category_instance{};
66  const system_error_category system_category_instance{};
67}
68
69namespace std _GLIBCXX_VISIBILITY(default)
70{
71_GLIBCXX_BEGIN_NAMESPACE_VERSION
72
73  error_category::error_category() noexcept = default;
74
75  error_category::~error_category() noexcept = default;
76
77  const error_category&
78  system_category() noexcept { return system_category_instance; }
79
80  const error_category&
81  generic_category() noexcept { return generic_category_instance; }
82
83  system_error::~system_error() noexcept = default;
84
85  error_condition
86  error_category::default_error_condition(int __i) const noexcept
87  { return error_condition(__i, *this); }
88
89  bool
90  error_category::equivalent(int __i,
91			     const error_condition& __cond) const noexcept
92  { return default_error_condition(__i) == __cond; }
93
94  bool
95  error_category::equivalent(const error_code& __code, int __i) const noexcept
96  { return *this == __code.category() && __code.value() == __i; }
97
98  error_condition
99  error_code::default_error_condition() const noexcept
100  { return category().default_error_condition(value()); }
101
102_GLIBCXX_END_NAMESPACE_VERSION
103} // namespace
104