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Diffstat (limited to 'gcc-4.9/libstdc++-v3/include/bits/sstream.tcc')
| -rw-r--r-- | gcc-4.9/libstdc++-v3/include/bits/sstream.tcc | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/gcc-4.9/libstdc++-v3/include/bits/sstream.tcc b/gcc-4.9/libstdc++-v3/include/bits/sstream.tcc new file mode 100644 index 0000000..736466e --- /dev/null +++ b/gcc-4.9/libstdc++-v3/include/bits/sstream.tcc @@ -0,0 +1,288 @@ +// String based streams -*- C++ -*- + +// Copyright (C) 1997-2014 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 bits/sstream.tcc + * This is an internal header file, included by other library headers. + * Do not attempt to use it directly. @headername{sstream} + */ + +// +// ISO C++ 14882: 27.7 String-based streams +// + +#ifndef _SSTREAM_TCC +#define _SSTREAM_TCC 1 + +#pragma GCC system_header + +namespace std _GLIBCXX_VISIBILITY(default) +{ +_GLIBCXX_BEGIN_NAMESPACE_VERSION + + template <class _CharT, class _Traits, class _Alloc> + typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type + basic_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_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); + + 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 + // available + const __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_type + basic_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_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); + + // _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->setg(this->eback(), this->eback() + __newoffi, + this->egptr()); + __ret = pos_type(__newoffi); + } + if ((__testout || __testboth) + && __newoffo >= 0 + && this->egptr() - __beg >= __newoffo) + { + _M_pbump(this->pbase(), this->epptr(), __newoffo); + __ret = pos_type(__newoffo); + } + } + return __ret; + } + + template <class _CharT, class _Traits, class _Alloc> + 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)); + 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->setg(this->eback(), this->eback() + __pos, + this->egptr()); + if (__testout) + _M_pbump(this->pbase(), this->epptr(), __pos); + __ret = __sp; + } + } + return __ret; + } + + template <class _CharT, class _Traits, class _Alloc> + void + basic_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) + { + _M_pbump(__base, __endp, __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); + } + } + + template <class _CharT, class _Traits, class _Alloc> + void + basic_stringbuf<_CharT, _Traits, _Alloc>:: + _M_pbump(char_type* __pbeg, char_type* __pend, off_type __off) + { + this->setp(__pbeg, __pend); + while (__off > __gnu_cxx::__numeric_traits<int>::__max) + { + this->pbump(__gnu_cxx::__numeric_traits<int>::__max); + __off -= __gnu_cxx::__numeric_traits<int>::__max; + } + this->pbump(__off); + } + + // Inhibit implicit instantiations for required instantiations, + // which are defined via explicit instantiations elsewhere. +#if _GLIBCXX_EXTERN_TEMPLATE + extern 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_T + extern 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_VERSION +} // namespace std + +#endif |