2015-04-30 21:11:52 +02:00
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// Helpers for quoted stream manipulators -*- C++ -*-
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2017-01-01 13:07:43 +01:00
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// Copyright (C) 2013-2017 Free Software Foundation, Inc.
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2015-04-30 21:11:52 +02:00
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file bits/quoted_string.h
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{iomanip}
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*/
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#ifndef _GLIBCXX_QUOTED_STRING_H
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#define _GLIBCXX_QUOTED_STRING_H 1
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#pragma GCC system_header
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#if __cplusplus < 201103L
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# include <bits/c++0x_warning.h>
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#else
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#include <sstream>
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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namespace __detail {
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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/**
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* @brief Struct for delimited strings.
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*/
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template<typename _String, typename _CharT>
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struct _Quoted_string
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{
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static_assert(is_reference<_String>::value
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|| is_pointer<_String>::value,
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"String type must be pointer or reference");
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_Quoted_string(_String __str, _CharT __del, _CharT __esc)
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: _M_string(__str), _M_delim{__del}, _M_escape{__esc}
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{ }
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_Quoted_string&
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operator=(_Quoted_string&) = delete;
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_String _M_string;
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_CharT _M_delim;
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_CharT _M_escape;
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};
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/**
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* @brief Inserter for quoted strings.
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*
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* _GLIBCXX_RESOLVE_LIB_DEFECTS
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* DR 2344 quoted()'s interaction with padding is unclear
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*/
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template<typename _CharT, typename _Traits>
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std::basic_ostream<_CharT, _Traits>&
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operator<<(std::basic_ostream<_CharT, _Traits>& __os,
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const _Quoted_string<const _CharT*, _CharT>& __str)
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{
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std::basic_ostringstream<_CharT, _Traits> __ostr;
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__ostr << __str._M_delim;
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for (const _CharT* __c = __str._M_string; *__c; ++__c)
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{
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if (*__c == __str._M_delim || *__c == __str._M_escape)
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__ostr << __str._M_escape;
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__ostr << *__c;
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}
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__ostr << __str._M_delim;
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return __os << __ostr.str();
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}
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/**
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* @brief Inserter for quoted strings.
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*
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* _GLIBCXX_RESOLVE_LIB_DEFECTS
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* DR 2344 quoted()'s interaction with padding is unclear
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*/
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template<typename _CharT, typename _Traits, typename _String>
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std::basic_ostream<_CharT, _Traits>&
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operator<<(std::basic_ostream<_CharT, _Traits>& __os,
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const _Quoted_string<_String, _CharT>& __str)
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{
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std::basic_ostringstream<_CharT, _Traits> __ostr;
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__ostr << __str._M_delim;
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for (auto& __c : __str._M_string)
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{
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if (__c == __str._M_delim || __c == __str._M_escape)
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__ostr << __str._M_escape;
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__ostr << __c;
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}
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__ostr << __str._M_delim;
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return __os << __ostr.str();
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}
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/**
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* @brief Extractor for delimited strings.
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* The left and right delimiters can be different.
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*/
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template<typename _CharT, typename _Traits, typename _Alloc>
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std::basic_istream<_CharT, _Traits>&
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operator>>(std::basic_istream<_CharT, _Traits>& __is,
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const _Quoted_string<basic_string<_CharT, _Traits, _Alloc>&,
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_CharT>& __str)
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{
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_CharT __c;
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__is >> __c;
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if (!__is.good())
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return __is;
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if (__c != __str._M_delim)
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{
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__is.unget();
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__is >> __str._M_string;
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return __is;
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}
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__str._M_string.clear();
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std::ios_base::fmtflags __flags
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= __is.flags(__is.flags() & ~std::ios_base::skipws);
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do
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{
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__is >> __c;
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if (!__is.good())
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break;
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if (__c == __str._M_escape)
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{
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__is >> __c;
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if (!__is.good())
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break;
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}
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else if (__c == __str._M_delim)
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break;
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__str._M_string += __c;
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}
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while (true);
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__is.setf(__flags);
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return __is;
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}
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace __detail
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} // namespace std
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#endif // C++11
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#endif /* _GLIBCXX_QUOTED_STRING_H */
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