libstdc++-v3/src/system_error.cc

   1 // <system_error> implementation file
   2
   3 // Copyright (C) 2007, 2008
   4 // Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 2, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  21
  22 // As a special exception, you may use this file as part of a free software
  23 // library without restriction.  Specifically, if other files instantiate
  24 // templates or use macros or inline functions from this file, or you compile
  25 // this file and link it with other files to produce an executable, this
  26 // file does not by itself cause the resulting executable to be covered by
  27 // the GNU General Public License.  This exception does not however
  28 // invalidate any other reasons why the executable file might be covered by
  29 // the GNU General Public License.
  30
  31 #include <cstring>
  32 #include <system_error>
  33 #include <bits/functexcept.h>
  34 #include <limits>
  35
  36 namespace
  37 {
  38   using std::string;
  39
  40   struct generic_error_category : public std::error_category
  41   {
  42     virtual const char*
  43     name() const
  44     { return "generic"; }
  45
  46     virtual string
  47     message(int i) const
  48     {
  49       // XXX locale issues: how does one get or set loc.
  50       // _GLIBCXX_HAVE_STRERROR_L, strerror_l(i, cloc)
  51       return string(strerror(i));
  52     }
  53   };
  54
  55   struct system_error_category : public std::error_category
  56   {
  57     virtual const char*
  58     name() const
  59     { return "system"; }
  60
  61     virtual string
  62     message(int i) const
  63     {
  64       // XXX locale issues: how does one get or set loc.
  65       // _GLIBCXX_HAVE_STRERROR_L, strerror_l(i, cloc)
  66       return string(strerror(i));
  67     }
  68   };
  69
  70   const generic_error_category generic_category_instance;
  71   const system_error_category system_category_instance;
  72 }
  73
  74 _GLIBCXX_BEGIN_NAMESPACE(std)
  75
  76   const error_category& system_category = system_category_instance;
  77   const error_category& generic_category = generic_category_instance;
  78
  79   system_error::~system_error() throw() { }
  80
  81   error_condition
  82   error_category::default_error_condition(int __i) const
  83   { return error_condition(__i, *this); }
  84
  85   bool
  86   error_category::equivalent(int __i, const error_condition& __cond) const
  87   { return default_error_condition(__i) == __cond; }
  88
  89   bool
  90   error_category::equivalent(const error_code& __code, int __i) const
  91   { return *this == __code.category() && __code.value() == __i; }
  92
  93   error_condition
  94   error_code::default_error_condition() const
  95   { return category().default_error_condition(value()); }
  96
  97 _GLIBCXX_END_NAMESPACE