libstdc++-v3/src/system_error.cc

   1 // <system_error> implementation file
   2
   3 // Copyright (C) 2007, 2008, 2009, 2010 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
  31 namespace
  32 {
  33   using std::string;
  34
  35   struct generic_error_category : public std::error_category
  36   {
  37     generic_error_category() {}
  38
  39     virtual const char*
  40     name() const
  41     { return "generic"; }
  42
  43     virtual string
  44     message(int i) const
  45     {
  46       // XXX locale issues: how does one get or set loc.
  47       // _GLIBCXX_HAVE_STRERROR_L, strerror_l(i, cloc)
  48       return string(strerror(i));
  49     }
  50   };
  51
  52   struct system_error_category : public std::error_category
  53   {
  54     system_error_category() {}
  55
  56     virtual const char*
  57     name() const
  58     { return "system"; }
  59
  60     virtual string
  61     message(int i) const
  62     {
  63       // XXX locale issues: how does one get or set loc.
  64       // _GLIBCXX_HAVE_STRERROR_L, strerror_l(i, cloc)
  65       return string(strerror(i));
  66     }
  67   };
  68
  69   const generic_error_category generic_category_instance;
  70   const system_error_category system_category_instance;
  71 }
  72
  73 _GLIBCXX_BEGIN_NAMESPACE(std)
  74
  75   const error_category&
  76   system_category() throw() { return system_category_instance; }
  77
  78   const error_category&
  79   generic_category() throw() { return generic_category_instance; }
  80
  81   system_error::~system_error() throw() { }
  82
  83   error_condition
  84   error_category::default_error_condition(int __i) const
  85   { return error_condition(__i, *this); }
  86
  87   bool
  88   error_category::equivalent(int __i, const error_condition& __cond) const
  89   { return default_error_condition(__i) == __cond; }
  90
  91   bool
  92   error_category::equivalent(const error_code& __code, int __i) const
  93   { return *this == __code.category() && __code.value() == __i; }
  94
  95   error_condition
  96   error_code::default_error_condition() const
  97   { return category().default_error_condition(value()); }
  98
  99 _GLIBCXX_END_NAMESPACE