// String based streams -*- C++ -*- // Copyright (C) 1997, 1998, 1999, 2001, 2002, 2003 // 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 2, 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. // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING. If not, write to the Free // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, // USA. // As a special exception, you may use this file as part of a free software // library without restriction. Specifically, if other files instantiate // templates or use macros or inline functions from this file, or you compile // this file and link it with other files to produce an executable, this // file does not by itself cause the resulting executable to be covered by // the GNU General Public License. This exception does not however // invalidate any other reasons why the executable file might be covered by // the GNU General Public License. // // ISO C++ 14882: 27.7 String-based streams // #ifndef _CPP_BITS_SSTREAM_TCC #define _CPP_BITS_SSTREAM_TCC 1 #pragma GCC system_header #include namespace std { template typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type basic_stringbuf<_CharT, _Traits, _Alloc>:: pbackfail(int_type __c) { int_type __ret = traits_type::eof(); const bool __testeof = traits_type::eq_int_type(__c, __ret); if (this->_M_in_beg < this->_M_in_cur) { const bool __testeq = traits_type::eq(traits_type::to_char_type(__c), this->_M_in_cur[-1]); --this->_M_in_cur; // Try to put back __c into input sequence in one of three ways. // Order these tests done in is unspecified by the standard. if (!__testeof && __testeq) __ret = __c; else if (__testeof) __ret = traits_type::not_eof(__c); else { *this->_M_in_cur = traits_type::to_char_type(__c); __ret = __c; } } return __ret; } template typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type basic_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); // 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. __size_type __len = std::max(__size_type(_M_string.capacity() + 1), __size_type(512)); const bool __testput = this->_M_out_cur < this->_M_out_end; if (__builtin_expect(!__testput && __len > _M_string.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. if (!__testput) { // In virtue of DR 169 (TC) we are allowed to grow more than // one char. That's easy to implement thanks to the exponential // growth policy builtin into basic_string. __string_type __tmp; __tmp.reserve(__len); __tmp.assign(_M_string.data(), this->_M_out_end - this->_M_out_beg); _M_string.swap(__tmp); // Just to be sure... _M_string.reserve(__len); _M_sync(const_cast(_M_string.data()), this->_M_in_cur - this->_M_in_beg, this->_M_out_cur - this->_M_out_beg); } return this->sputc(traits_type::to_char_type(__c)); } template typename basic_stringbuf<_CharT, _Traits, _Alloc>::pos_type basic_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); if (_M_string.capacity() && (__testin || __testout || __testboth)) { char_type* __beg = __testin ? this->_M_in_beg : this->_M_out_beg; off_type __newoffi = 0; off_type __newoffo = 0; if (__way == ios_base::cur) { __newoffi = this->_M_in_cur - __beg; __newoffo = this->_M_out_cur - __beg; } else if (__way == ios_base::end) { __newoffi = this->_M_in_end - __beg; // Due to the resolution of DR169, ios_base::end // is this->_M_out_lim, not _M_out_end. __newoffo = this->_M_out_lim - __beg; } if ((__testin || __testboth) && __newoffi + __off >= 0 && this->_M_in_end - __beg >= __newoffi + __off) { this->_M_in_cur = __beg + __newoffi + __off; __ret = pos_type(__newoffi); } if ((__testout || __testboth) && __newoffo + __off >= 0 && this->_M_out_lim - __beg >= __newoffo + __off) { this->_M_out_cur = __beg + __newoffo + __off; __ret = pos_type(__newoffo); } } return __ret; } template typename basic_stringbuf<_CharT, _Traits, _Alloc>::pos_type basic_stringbuf<_CharT, _Traits, _Alloc>:: seekpos(pos_type __sp, ios_base::openmode __mode) { pos_type __ret = pos_type(off_type(-1)); if (_M_string.capacity()) { off_type __pos = __sp; // Use streamoff operator to do conversion. const bool __testin = (ios_base::in & this->_M_mode & __mode) != 0; const bool __testout = (ios_base::out & this->_M_mode & __mode) != 0; char_type* __beg = __testin ? this->_M_in_beg : this->_M_out_beg; // NB: Ordered. bool __testposi = false; bool __testposo = false; if (__testin && 0 <= __pos && __pos <= this->_M_in_end - __beg) __testposi = true; if (__testout && 0 <= __pos && __pos <= this->_M_out_lim - __beg) __testposo = true; if (__testposi || __testposo) { if (__testposi) this->_M_in_cur = __beg + __pos; if (__testposo) this->_M_out_cur = __beg + __pos; __ret = pos_type(off_type(__pos)); } } return __ret; } // Inhibit implicit instantiations for required instantiations, // which are defined via explicit instantiations elsewhere. // NB: This syntax is a GNU extension. extern template class basic_stringbuf; extern template class basic_istringstream; extern template class basic_ostringstream; extern template class basic_stringstream; #ifdef _GLIBCPP_USE_WCHAR_T extern template class basic_stringbuf; extern template class basic_istringstream; extern template class basic_ostringstream; extern template class basic_stringstream; #endif } // namespace std #endif