| // Iostreams base classes -*- C++ -*- |
| |
| // Copyright (C) 2014-2017 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // Under Section 7 of GPL version 3, you are granted additional |
| // permissions described in the GCC Runtime Library Exception, version |
| // 3.1, as published by the Free Software Foundation. |
| |
| // You should have received a copy of the GNU General Public License and |
| // a copy of the GCC Runtime Library Exception along with this program; |
| // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| // <http://www.gnu.org/licenses/>. |
| |
| // |
| // ISO C++ 14882:2011: 27.5.3.1.1 Class ios_base::failure |
| // |
| |
| #define _GLIBCXX_USE_CXX11_ABI 1 |
| #include <ios> |
| #include <bits/functexcept.h> |
| #include <cxxabi.h> |
| |
| #ifdef _GLIBCXX_USE_NLS |
| # include <libintl.h> |
| # define _(msgid) gettext (msgid) |
| #else |
| # define _(msgid) (msgid) |
| #endif |
| |
| #if ! _GLIBCXX_USE_DUAL_ABI |
| # error This file should not be compiled for this configuration. |
| #endif |
| |
| namespace |
| { |
| struct io_error_category : std::error_category |
| { |
| virtual const char* |
| name() const noexcept |
| { return "iostream"; } |
| |
| _GLIBCXX_DEFAULT_ABI_TAG |
| virtual std::string message(int __ec) const |
| { |
| std::string __msg; |
| switch (std::io_errc(__ec)) |
| { |
| case std::io_errc::stream: |
| __msg = "iostream error"; |
| break; |
| default: |
| __msg = "Unknown error"; |
| break; |
| } |
| return __msg; |
| } |
| }; |
| |
| const io_error_category& |
| __io_category_instance() noexcept |
| { |
| static const io_error_category __ec{}; |
| return __ec; |
| } |
| |
| } // namespace |
| |
| namespace std _GLIBCXX_VISIBILITY(default) |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| |
| const error_category& |
| iostream_category() noexcept |
| { return __io_category_instance(); } |
| |
| ios_base::failure::failure(const string& __str) |
| : system_error(io_errc::stream, __str) { } |
| |
| ios_base::failure::failure(const string& __str, const error_code& __ec) |
| : system_error(__ec, __str) { } |
| |
| ios_base::failure::failure(const char* __str, const error_code& __ec) |
| : system_error(__ec, __str) { } |
| |
| ios_base::failure::~failure() |
| { } |
| |
| const char* |
| ios_base::failure::what() const throw() |
| { return runtime_error::what(); } |
| |
| #if __cpp_rtti |
| // These functions are defined in src/c++98/ios_failure.cc |
| extern void __construct_ios_failure(void*, const char*); |
| extern void __destroy_ios_failure(void*); |
| extern bool __is_ios_failure_handler(const __cxxabiv1::__class_type_info*); |
| |
| // The type thrown to report errors during stream buffer operations. |
| // In addition to the ios::failure[abi:cxx11] base class it also has a |
| // member of the gcc4-compatible ios::failure type (in an opaque buffer). |
| struct __ios_failure : std::ios::failure |
| { |
| __ios_failure(const char* s) : failure(s) |
| { __construct_ios_failure(buf, runtime_error::what()); } |
| |
| ~__ios_failure() |
| { __destroy_ios_failure(buf); } |
| |
| // Use std::runtime_error as a proxy for the gcc4-compatible ios::failure |
| // (which can't be declared here because _GLIBCXX_USE_CXX11_ABI == 1). |
| // There are assertions in src/c++98/ios_failure.cc to ensure the size |
| // and alignment assumptions are valid. |
| alignas(runtime_error) unsigned char buf[sizeof(runtime_error)]; |
| }; |
| |
| // Custom type info for __ios_failure. |
| class __iosfail_type_info : __cxxabiv1::__si_class_type_info |
| { |
| ~__iosfail_type_info(); |
| |
| bool |
| __do_upcast (const __class_type_info *dst_type, |
| void **obj_ptr) const override; |
| }; |
| |
| __iosfail_type_info::~__iosfail_type_info() = default; |
| |
| // This function gets called to see if an exception of type |
| // __ios_failure can be upcast to the type in a catch handler. |
| bool |
| __iosfail_type_info::__do_upcast(const __class_type_info *dst_type, |
| void **obj_ptr) const |
| { |
| // If the handler is for the gcc4-compatible ios::failure type then |
| // catch the object stored in __ios_failure::buf instead of |
| // the __ios_failure exception object itself. |
| if (__is_ios_failure_handler(dst_type)) |
| { |
| *obj_ptr = static_cast<__ios_failure*>(*obj_ptr)->buf; |
| return true; |
| } |
| // Otherwise proceed as normal to see if the handler matches. |
| return __class_type_info::__do_upcast(dst_type, obj_ptr); |
| } |
| #else // ! __cpp_rtti |
| using __ios_failure = ios::failure; |
| #endif |
| |
| void |
| __throw_ios_failure(const char* __s __attribute__((unused))) |
| { _GLIBCXX_THROW_OR_ABORT(__ios_failure(_(__s))); } |
| |
| _GLIBCXX_END_NAMESPACE_VERSION |
| } // namespace |