// String based streams -*- C++ -*-// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,// 2006, 2007, 2009// 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/>./** @file sstream.tcc* This is an internal header file, included by other library headers.* You should not attempt to use it directly.*///// ISO C++ 14882: 27.7 String-based streams//#ifndef _SSTREAM_TCC#define _SSTREAM_TCC 1#pragma GCC system_header_GLIBCXX_BEGIN_NAMESPACE(std)template <class _CharT, class _Traits, class _Alloc>typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_typebasic_stringbuf<_CharT, _Traits, _Alloc>::pbackfail(int_type __c){int_type __ret = traits_type::eof();if (this->eback() < this->gptr()){// Try to put back __c into input sequence in one of three ways.// Order these tests done in is unspecified by the standard.const bool __testeof = traits_type::eq_int_type(__c, __ret);if (!__testeof){const bool __testeq = traits_type::eq(traits_type::to_char_type(__c),this->gptr()[-1]);const bool __testout = this->_M_mode & ios_base::out;if (__testeq || __testout){this->gbump(-1);if (!__testeq)*this->gptr() = traits_type::to_char_type(__c);__ret = __c;}}else{this->gbump(-1);__ret = traits_type::not_eof(__c);}}return __ret;}template <class _CharT, class _Traits, class _Alloc>typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_typebasic_stringbuf<_CharT, _Traits, _Alloc>::overflow(int_type __c){const bool __testout = this->_M_mode & ios_base::out;if (__builtin_expect(!__testout, false))return traits_type::eof();const bool __testeof = traits_type::eq_int_type(__c, traits_type::eof());if (__builtin_expect(__testeof, false))return traits_type::not_eof(__c);const __size_type __capacity = _M_string.capacity();const __size_type __max_size = _M_string.max_size();const bool __testput = this->pptr() < this->epptr();if (__builtin_expect(!__testput && __capacity == __max_size, false))return traits_type::eof();// Try to append __c into output sequence in one of two ways.// Order these tests done in is unspecified by the standard.const char_type __conv = traits_type::to_char_type(__c);if (!__testput){// NB: Start ostringstream buffers at 512 chars. This is an// experimental value (pronounced "arbitrary" in some of the// hipper English-speaking countries), and can be changed to// suit particular needs.//// _GLIBCXX_RESOLVE_LIB_DEFECTS// 169. Bad efficiency of overflow() mandated// 432. stringbuf::overflow() makes only one write position// availableconst __size_type __opt_len = std::max(__size_type(2 * __capacity),__size_type(512));const __size_type __len = std::min(__opt_len, __max_size);__string_type __tmp;__tmp.reserve(__len);if (this->pbase())__tmp.assign(this->pbase(), this->epptr() - this->pbase());__tmp.push_back(__conv);_M_string.swap(__tmp);_M_sync(const_cast<char_type*>(_M_string.data()),this->gptr() - this->eback(), this->pptr() - this->pbase());}else*this->pptr() = __conv;this->pbump(1);return __c;}template <class _CharT, class _Traits, class _Alloc>typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_typebasic_stringbuf<_CharT, _Traits, _Alloc>::underflow(){int_type __ret = traits_type::eof();const bool __testin = this->_M_mode & ios_base::in;if (__testin){// Update egptr() to match the actual string end._M_update_egptr();if (this->gptr() < this->egptr())__ret = traits_type::to_int_type(*this->gptr());}return __ret;}template <class _CharT, class _Traits, class _Alloc>typename basic_stringbuf<_CharT, _Traits, _Alloc>::pos_typebasic_stringbuf<_CharT, _Traits, _Alloc>::seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __mode){pos_type __ret = pos_type(off_type(-1));bool __testin = (ios_base::in & this->_M_mode & __mode) != 0;bool __testout = (ios_base::out & this->_M_mode & __mode) != 0;const bool __testboth = __testin && __testout && __way != ios_base::cur;__testin &= !(__mode & ios_base::out);__testout &= !(__mode & ios_base::in);// _GLIBCXX_RESOLVE_LIB_DEFECTS// 453. basic_stringbuf::seekoff need not always fail for an empty stream.const char_type* __beg = __testin ? this->eback() : this->pbase();if ((__beg || !__off) && (__testin || __testout || __testboth)){_M_update_egptr();off_type __newoffi = __off;off_type __newoffo = __newoffi;if (__way == ios_base::cur){__newoffi += this->gptr() - __beg;__newoffo += this->pptr() - __beg;}else if (__way == ios_base::end)__newoffo = __newoffi += this->egptr() - __beg;if ((__testin || __testboth)&& __newoffi >= 0&& this->egptr() - __beg >= __newoffi){this->gbump((__beg + __newoffi) - this->gptr());__ret = pos_type(__newoffi);}if ((__testout || __testboth)&& __newoffo >= 0&& this->egptr() - __beg >= __newoffo){this->pbump((__beg + __newoffo) - this->pptr());__ret = pos_type(__newoffo);}}return __ret;}template <class _CharT, class _Traits, class _Alloc>typename basic_stringbuf<_CharT, _Traits, _Alloc>::pos_typebasic_stringbuf<_CharT, _Traits, _Alloc>::seekpos(pos_type __sp, ios_base::openmode __mode){pos_type __ret = pos_type(off_type(-1));const bool __testin = (ios_base::in & this->_M_mode & __mode) != 0;const bool __testout = (ios_base::out & this->_M_mode & __mode) != 0;const char_type* __beg = __testin ? this->eback() : this->pbase();if ((__beg || !off_type(__sp)) && (__testin || __testout)){_M_update_egptr();const off_type __pos(__sp);const bool __testpos = (0 <= __pos&& __pos <= this->egptr() - __beg);if (__testpos){if (__testin)this->gbump((__beg + __pos) - this->gptr());if (__testout)this->pbump((__beg + __pos) - this->pptr());__ret = __sp;}}return __ret;}template <class _CharT, class _Traits, class _Alloc>voidbasic_stringbuf<_CharT, _Traits, _Alloc>::_M_sync(char_type* __base, __size_type __i, __size_type __o){const bool __testin = _M_mode & ios_base::in;const bool __testout = _M_mode & ios_base::out;char_type* __endg = __base + _M_string.size();char_type* __endp = __base + _M_string.capacity();if (__base != _M_string.data()){// setbuf: __i == size of buffer area (_M_string.size() == 0).__endg += __i;__i = 0;__endp = __endg;}if (__testin)this->setg(__base, __base + __i, __endg);if (__testout){this->setp(__base, __endp);this->pbump(__o);// egptr() always tracks the string end. When !__testin,// for the correct functioning of the streambuf inlines// the other get area pointers are identical.if (!__testin)this->setg(__endg, __endg, __endg);}}// Inhibit implicit instantiations for required instantiations,// which are defined via explicit instantiations elsewhere.// NB: This syntax is a GNU extension.#if _GLIBCXX_EXTERN_TEMPLATEextern template class basic_stringbuf<char>;extern template class basic_istringstream<char>;extern template class basic_ostringstream<char>;extern template class basic_stringstream<char>;#ifdef _GLIBCXX_USE_WCHAR_Textern template class basic_stringbuf<wchar_t>;extern template class basic_istringstream<wchar_t>;extern template class basic_ostringstream<wchar_t>;extern template class basic_stringstream<wchar_t>;#endif#endif_GLIBCXX_END_NAMESPACE#endif