libstdc++-v3/src/c++11/cxx11-ios_failure.cc

   1 // Iostreams base classes -*- C++ -*-
   2
   3 // Copyright (C) 2014-2018 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 // ISO C++ 14882:2011: 27.5.3.1.1  Class ios_base::failure
  27 //
  28
  29 #define _GLIBCXX_USE_CXX11_ABI 1
  30 #include <ios>
  31
  32 #if ! _GLIBCXX_USE_DUAL_ABI
  33 # error This file should not be compiled for this configuration.
  34 #endif
  35
  36 namespace
  37 {
  38   struct io_error_category : std::error_category
  39   {
  40     virtual const char*
  41     name() const noexcept
  42     { return "iostream"; }
  43
  44     _GLIBCXX_DEFAULT_ABI_TAG
  45     virtual std::string message(int __ec) const
  46     {
  47       std::string __msg;
  48       switch (std::io_errc(__ec))
  49       {
  50       case std::io_errc::stream:
  51           __msg = "iostream error";
  52           break;
  53       default:
  54           __msg = "Unknown error";
  55           break;
  56       }
  57       return __msg;
  58     }
  59   };
  60
  61   const io_error_category&
  62   __io_category_instance() noexcept
  63   {
  64     static const io_error_category __ec{};
  65     return __ec;
  66   }
  67
  68 } // namespace
  69
  70 namespace std _GLIBCXX_VISIBILITY(default)
  71 {
  72 _GLIBCXX_BEGIN_NAMESPACE_VERSION
  73
  74   const error_category&
  75   iostream_category() noexcept
  76   { return __io_category_instance(); }
  77
  78   ios_base::failure::failure(const string& __str)
  79   : system_error(io_errc::stream, __str) { }
  80
  81   ios_base::failure::failure(const string& __str, const error_code& __ec)
  82   : system_error(__ec, __str) { }
  83
  84   ios_base::failure::failure(const char* __str, const error_code& __ec)
  85   : system_error(__ec, __str) { }
  86
  87   ios_base::failure::~failure()
  88   { }
  89
  90   const char*
  91   ios_base::failure::what() const throw()
  92   { return runtime_error::what(); }
  93
  94 _GLIBCXX_END_NAMESPACE_VERSION
  95 } // namespace