| // Helper for accessing __cxx11::string from the ABI -*- 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/>. |
| |
| |
| #define _GLIBCXX_USE_CXX11_ABI 1 |
| #define __sso_string __sso_stringxxx |
| #include <string> |
| #include <stdexcept> |
| #undef __sso_string |
| |
| #if ! _GLIBCXX_USE_DUAL_ABI |
| # error This file should not be compiled for this configuration. |
| #endif |
| |
| namespace std _GLIBCXX_VISIBILITY(default) |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wabi-tag" |
| // Redefine __sso_string so that we can define and export its members |
| // in terms of the SSO std::string. |
| struct __sso_string |
| { |
| struct __str |
| { |
| const char* _M_p; |
| size_t _M_string_length; |
| char _M_local_buf[16]; |
| }; |
| |
| union { |
| __str _M_s; |
| char _M_bytes[sizeof(_M_s)]; |
| std::string _M_str; |
| }; |
| |
| __sso_string(); |
| __sso_string(const std::string& s); |
| __sso_string(const char*, size_t n); |
| __sso_string(const __sso_string&) noexcept; |
| __sso_string& operator=(const __sso_string&) noexcept; |
| ~__sso_string(); |
| __sso_string(__sso_string&&) noexcept; |
| __sso_string& operator=(__sso_string&&) noexcept; |
| }; |
| #pragma GCC diagnostic pop |
| |
| __sso_string::__sso_string() : _M_str() { } |
| |
| #if _GLIBCXX_USE_CXX11_ABI |
| static_assert(sizeof(__sso_string) == sizeof(std::string), |
| "sizeof(std::string) has changed"); |
| static_assert(alignof(__sso_string) == alignof(std::string), |
| "alignof(std::string) has changed"); |
| |
| // This constructor is defined in src/c++11/cow-stdexcept.cc for COW strings |
| __sso_string::__sso_string(const std::string& s) : _M_str(s) { } |
| #endif |
| |
| __sso_string::__sso_string(const char* s, size_t n) : _M_str(s, n) { } |
| |
| __sso_string::__sso_string(const __sso_string& s) noexcept |
| : _M_str(s._M_str) { } |
| |
| __sso_string& |
| __sso_string::operator=(const __sso_string& s) noexcept |
| { |
| _M_str = s._M_str; |
| return *this; |
| } |
| |
| __sso_string::~__sso_string() { _M_str.~basic_string(); } |
| |
| __sso_string::__sso_string(__sso_string&& s) noexcept |
| : _M_str(std::move(s._M_str)) { } |
| |
| __sso_string& |
| __sso_string::operator=(__sso_string&& s) noexcept |
| { |
| _M_str = std::move(s._M_str); |
| return *this; |
| } |
| |
| _GLIBCXX_END_NAMESPACE_VERSION |
| } // namespace |