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istream.tcc
// istream classes -*- C++ -*- // Copyright (C) 1997-2018 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/istream.tcc * This is an internal header file, included by other library headers. * Do not attempt to use it directly. @headername{istream} */ // // ISO C++ 14882: 27.6.1 Input streams // #ifndef _ISTREAM_TCC #define _ISTREAM_TCC 1 #pragma GCC system_header #include <bits/cxxabi_forced.h> namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>::sentry:: sentry(basic_istream<_CharT, _Traits>& __in, bool __noskip) : _M_ok(false) { ios_base::iostate __err = ios_base::goodbit; if (__in.good()) __try { if (__in.tie()) __in.tie()->flush(); if (!__noskip && bool(__in.flags() & ios_base::skipws)) { const __int_type __eof = traits_type::eof(); __streambuf_type* __sb = __in.rdbuf(); __int_type __c = __sb->sgetc(); const __ctype_type& __ct = __check_facet(__in._M_ctype); while (!traits_type::eq_int_type(__c, __eof) && __ct.is(ctype_base::space, traits_type::to_char_type(__c))) __c = __sb->snextc(); // _GLIBCXX_RESOLVE_LIB_DEFECTS // 195. Should basic_istream::sentry's constructor ever // set eofbit? if (traits_type::eq_int_type(__c, __eof)) __err |= ios_base::eofbit; } } __catch(__cxxabiv1::__forced_unwind&) { __in._M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { __in._M_setstate(ios_base::badbit); } if (__in.good() && __err == ios_base::goodbit) _M_ok = true; else { __err |= ios_base::failbit; __in.setstate(__err); } } template<typename _CharT, typename _Traits> template<typename _ValueT> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: _M_extract(_ValueT& __v) { sentry __cerb(*this, false); if (__cerb) { ios_base::iostate __err = ios_base::goodbit; __try { const __num_get_type& __ng = __check_facet(this->_M_num_get); __ng.get(*this, 0, *this, __err, __v); } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } if (__err) this->setstate(__err); } return *this; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: operator>>(short& __n) { // _GLIBCXX_RESOLVE_LIB_DEFECTS // 118. basic_istream uses nonexistent num_get member functions. sentry __cerb(*this, false); if (__cerb) { ios_base::iostate __err = ios_base::goodbit; __try { long __l; const __num_get_type& __ng = __check_facet(this->_M_num_get); __ng.get(*this, 0, *this, __err, __l); // _GLIBCXX_RESOLVE_LIB_DEFECTS // 696. istream::operator>>(int&) broken. if (__l < __gnu_cxx::__numeric_traits<short>::__min) { __err |= ios_base::failbit; __n = __gnu_cxx::__numeric_traits<short>::__min; } else if (__l > __gnu_cxx::__numeric_traits<short>::__max) { __err |= ios_base::failbit; __n = __gnu_cxx::__numeric_traits<short>::__max; } else __n = short(__l); } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } if (__err) this->setstate(__err); } return *this; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: operator>>(int& __n) { // _GLIBCXX_RESOLVE_LIB_DEFECTS // 118. basic_istream uses nonexistent num_get member functions. sentry __cerb(*this, false); if (__cerb) { ios_base::iostate __err = ios_base::goodbit; __try { long __l; const __num_get_type& __ng = __check_facet(this->_M_num_get); __ng.get(*this, 0, *this, __err, __l); // _GLIBCXX_RESOLVE_LIB_DEFECTS // 696. istream::operator>>(int&) broken. if (__l < __gnu_cxx::__numeric_traits<int>::__min) { __err |= ios_base::failbit; __n = __gnu_cxx::__numeric_traits<int>::__min; } else if (__l > __gnu_cxx::__numeric_traits<int>::__max) { __err |= ios_base::failbit; __n = __gnu_cxx::__numeric_traits<int>::__max; } else __n = int(__l); } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } if (__err) this->setstate(__err); } return *this; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: operator>>(__streambuf_type* __sbout) { ios_base::iostate __err = ios_base::goodbit; sentry __cerb(*this, false); if (__cerb && __sbout) { __try { bool __ineof; if (!__copy_streambufs_eof(this->rdbuf(), __sbout, __ineof)) __err |= ios_base::failbit; if (__ineof) __err |= ios_base::eofbit; } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::failbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::failbit); } } else if (!__sbout) __err |= ios_base::failbit; if (__err) this->setstate(__err); return *this; } template<typename _CharT, typename _Traits> typename basic_istream<_CharT, _Traits>::int_type basic_istream<_CharT, _Traits>:: get(void) { const int_type __eof = traits_type::eof(); int_type __c = __eof; _M_gcount = 0; ios_base::iostate __err = ios_base::goodbit; sentry __cerb(*this, true); if (__cerb) { __try { __c = this->rdbuf()->sbumpc(); // 27.6.1.1 paragraph 3 if (!traits_type::eq_int_type(__c, __eof)) _M_gcount = 1; else __err |= ios_base::eofbit; } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } } if (!_M_gcount) __err |= ios_base::failbit; if (__err) this->setstate(__err); return __c; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: get(char_type& __c) { _M_gcount = 0; ios_base::iostate __err = ios_base::goodbit; sentry __cerb(*this, true); if (__cerb) { __try { const int_type __cb = this->rdbuf()->sbumpc(); // 27.6.1.1 paragraph 3 if (!traits_type::eq_int_type(__cb, traits_type::eof())) { _M_gcount = 1; __c = traits_type::to_char_type(__cb); } else __err |= ios_base::eofbit; } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } } if (!_M_gcount) __err |= ios_base::failbit; if (__err) this->setstate(__err); return *this; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: get(char_type* __s, streamsize __n, char_type __delim) { _M_gcount = 0; ios_base::iostate __err = ios_base::goodbit; sentry __cerb(*this, true); if (__cerb) { __try { const int_type __idelim = traits_type::to_int_type(__delim); const int_type __eof = traits_type::eof(); __streambuf_type* __sb = this->rdbuf(); int_type __c = __sb->sgetc(); while (_M_gcount + 1 < __n && !traits_type::eq_int_type(__c, __eof) && !traits_type::eq_int_type(__c, __idelim)) { *__s++ = traits_type::to_char_type(__c); ++_M_gcount; __c = __sb->snextc(); } if (traits_type::eq_int_type(__c, __eof)) __err |= ios_base::eofbit; } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } } // _GLIBCXX_RESOLVE_LIB_DEFECTS // 243. get and getline when sentry reports failure. if (__n > 0) *__s = char_type(); if (!_M_gcount) __err |= ios_base::failbit; if (__err) this->setstate(__err); return *this; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: get(__streambuf_type& __sb, char_type __delim) { _M_gcount = 0; ios_base::iostate __err = ios_base::goodbit; sentry __cerb(*this, true); if (__cerb) { __try { const int_type __idelim = traits_type::to_int_type(__delim); const int_type __eof = traits_type::eof(); __streambuf_type* __this_sb = this->rdbuf(); int_type __c = __this_sb->sgetc(); char_type __c2 = traits_type::to_char_type(__c); while (!traits_type::eq_int_type(__c, __eof) && !traits_type::eq_int_type(__c, __idelim) && !traits_type::eq_int_type(__sb.sputc(__c2), __eof)) { ++_M_gcount; __c = __this_sb->snextc(); __c2 = traits_type::to_char_type(__c); } if (traits_type::eq_int_type(__c, __eof)) __err |= ios_base::eofbit; } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } } if (!_M_gcount) __err |= ios_base::failbit; if (__err) this->setstate(__err); return *this; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: getline(char_type* __s, streamsize __n, char_type __delim) { _M_gcount = 0; ios_base::iostate __err = ios_base::goodbit; sentry __cerb(*this, true); if (__cerb) { __try { const int_type __idelim = traits_type::to_int_type(__delim); const int_type __eof = traits_type::eof(); __streambuf_type* __sb = this->rdbuf(); int_type __c = __sb->sgetc(); while (_M_gcount + 1 < __n && !traits_type::eq_int_type(__c, __eof) && !traits_type::eq_int_type(__c, __idelim)) { *__s++ = traits_type::to_char_type(__c); __c = __sb->snextc(); ++_M_gcount; } if (traits_type::eq_int_type(__c, __eof)) __err |= ios_base::eofbit; else { if (traits_type::eq_int_type(__c, __idelim)) { __sb->sbumpc(); ++_M_gcount; } else __err |= ios_base::failbit; } } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } } // _GLIBCXX_RESOLVE_LIB_DEFECTS // 243. get and getline when sentry reports failure. if (__n > 0) *__s = char_type(); if (!_M_gcount) __err |= ios_base::failbit; if (__err) this->setstate(__err); return *this; } // We provide three overloads, since the first two are much simpler // than the general case. Also, the latter two can thus adopt the // same "batchy" strategy used by getline above. template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: ignore(void) { _M_gcount = 0; sentry __cerb(*this, true); if (__cerb) { ios_base::iostate __err = ios_base::goodbit; __try { const int_type __eof = traits_type::eof(); __streambuf_type* __sb = this->rdbuf(); if (traits_type::eq_int_type(__sb->sbumpc(), __eof)) __err |= ios_base::eofbit; else _M_gcount = 1; } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } if (__err) this->setstate(__err); } return *this; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: ignore(streamsize __n) { _M_gcount = 0; sentry __cerb(*this, true); if (__cerb && __n > 0) { ios_base::iostate __err = ios_base::goodbit; __try { const int_type __eof = traits_type::eof(); __streambuf_type* __sb = this->rdbuf(); int_type __c = __sb->sgetc(); // N.B. On LFS-enabled platforms streamsize is still 32 bits // wide: if we want to implement the standard mandated behavior // for n == max() (see 27.6.1.3/24) we are at risk of signed // integer overflow: thus these contortions. Also note that, // by definition, when more than 2G chars are actually ignored, // _M_gcount (the return value of gcount, that is) cannot be // really correct, being unavoidably too small. bool __large_ignore = false; while (true) { while (_M_gcount < __n && !traits_type::eq_int_type(__c, __eof)) { ++_M_gcount; __c = __sb->snextc(); } if (__n == __gnu_cxx::__numeric_traits<streamsize>::__max && !traits_type::eq_int_type(__c, __eof)) { _M_gcount = __gnu_cxx::__numeric_traits<streamsize>::__min; __large_ignore = true; } else break; } if (__large_ignore) _M_gcount = __gnu_cxx::__numeric_traits<streamsize>::__max; if (traits_type::eq_int_type(__c, __eof)) __err |= ios_base::eofbit; } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } if (__err) this->setstate(__err); } return *this; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: ignore(streamsize __n, int_type __delim) { _M_gcount = 0; sentry __cerb(*this, true); if (__cerb && __n > 0) { ios_base::iostate __err = ios_base::goodbit; __try { const int_type __eof = traits_type::eof(); __streambuf_type* __sb = this->rdbuf(); int_type __c = __sb->sgetc(); // See comment above. bool __large_ignore = false; while (true) { while (_M_gcount < __n && !traits_type::eq_int_type(__c, __eof) && !traits_type::eq_int_type(__c, __delim)) { ++_M_gcount; __c = __sb->snextc(); } if (__n == __gnu_cxx::__numeric_traits<streamsize>::__max && !traits_type::eq_int_type(__c, __eof) && !traits_type::eq_int_type(__c, __delim)) { _M_gcount = __gnu_cxx::__numeric_traits<streamsize>::__min; __large_ignore = true; } else break; } if (__large_ignore) _M_gcount = __gnu_cxx::__numeric_traits<streamsize>::__max; if (traits_type::eq_int_type(__c, __eof)) __err |= ios_base::eofbit; else if (traits_type::eq_int_type(__c, __delim)) { if (_M_gcount < __gnu_cxx::__numeric_traits<streamsize>::__max) ++_M_gcount; __sb->sbumpc(); } } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } if (__err) this->setstate(__err); } return *this; } template<typename _CharT, typename _Traits> typename basic_istream<_CharT, _Traits>::int_type basic_istream<_CharT, _Traits>:: peek(void) { int_type __c = traits_type::eof(); _M_gcount = 0; sentry __cerb(*this, true); if (__cerb) { ios_base::iostate __err = ios_base::goodbit; __try { __c = this->rdbuf()->sgetc(); if (traits_type::eq_int_type(__c, traits_type::eof())) __err |= ios_base::eofbit; } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } if (__err) this->setstate(__err); } return __c; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: read(char_type* __s, streamsize __n) { _M_gcount = 0; sentry __cerb(*this, true); if (__cerb) { ios_base::iostate __err = ios_base::goodbit; __try { _M_gcount = this->rdbuf()->sgetn(__s, __n); if (_M_gcount != __n) __err |= (ios_base::eofbit | ios_base::failbit); } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } if (__err) this->setstate(__err); } return *this; } template<typename _CharT, typename _Traits> streamsize basic_istream<_CharT, _Traits>:: readsome(char_type* __s, streamsize __n) { _M_gcount = 0; sentry __cerb(*this, true); if (__cerb) { ios_base::iostate __err = ios_base::goodbit; __try { // Cannot compare int_type with streamsize generically. const streamsize __num = this->rdbuf()->in_avail(); if (__num > 0) _M_gcount = this->rdbuf()->sgetn(__s, std::min(__num, __n)); else if (__num == -1) __err |= ios_base::eofbit; } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } if (__err) this->setstate(__err); } return _M_gcount; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: putback(char_type __c) { // _GLIBCXX_RESOLVE_LIB_DEFECTS // 60. What is a formatted input function? _M_gcount = 0; // Clear eofbit per N3168. this->clear(this->rdstate() & ~ios_base::eofbit); sentry __cerb(*this, true); if (__cerb) { ios_base::iostate __err = ios_base::goodbit; __try { const int_type __eof = traits_type::eof(); __streambuf_type* __sb = this->rdbuf(); if (!__sb || traits_type::eq_int_type(__sb->sputbackc(__c), __eof)) __err |= ios_base::badbit; } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } if (__err) this->setstate(__err); } return *this; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: unget(void) { // _GLIBCXX_RESOLVE_LIB_DEFECTS // 60. What is a formatted input function? _M_gcount = 0; // Clear eofbit per N3168. this->clear(this->rdstate() & ~ios_base::eofbit); sentry __cerb(*this, true); if (__cerb) { ios_base::iostate __err = ios_base::goodbit; __try { const int_type __eof = traits_type::eof(); __streambuf_type* __sb = this->rdbuf(); if (!__sb || traits_type::eq_int_type(__sb->sungetc(), __eof)) __err |= ios_base::badbit; } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } if (__err) this->setstate(__err); } return *this; } template<typename _CharT, typename _Traits> int basic_istream<_CharT, _Traits>:: sync(void) { // _GLIBCXX_RESOLVE_LIB_DEFECTS // DR60. Do not change _M_gcount. int __ret = -1; sentry __cerb(*this, true); if (__cerb) { ios_base::iostate __err = ios_base::goodbit; __try { __streambuf_type* __sb = this->rdbuf(); if (__sb) { if (__sb->pubsync() == -1) __err |= ios_base::badbit; else __ret = 0; } } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } if (__err) this->setstate(__err); } return __ret; } template<typename _CharT, typename _Traits> typename basic_istream<_CharT, _Traits>::pos_type basic_istream<_CharT, _Traits>:: tellg(void) { // _GLIBCXX_RESOLVE_LIB_DEFECTS // DR60. Do not change _M_gcount. pos_type __ret = pos_type(-1); sentry __cerb(*this, true); if (__cerb) { __try { if (!this->fail()) __ret = this->rdbuf()->pubseekoff(0, ios_base::cur, ios_base::in); } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } } return __ret; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: seekg(pos_type __pos) { // _GLIBCXX_RESOLVE_LIB_DEFECTS // DR60. Do not change _M_gcount. // Clear eofbit per N3168. this->clear(this->rdstate() & ~ios_base::eofbit); sentry __cerb(*this, true); if (__cerb) { ios_base::iostate __err = ios_base::goodbit; __try { if (!this->fail()) { // 136. seekp, seekg setting wrong streams? const pos_type __p = this->rdbuf()->pubseekpos(__pos, ios_base::in); // 129. Need error indication from seekp() and seekg() if (__p == pos_type(off_type(-1))) __err |= ios_base::failbit; } } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } if (__err) this->setstate(__err); } return *this; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& basic_istream<_CharT, _Traits>:: seekg(off_type __off, ios_base::seekdir __dir) { // _GLIBCXX_RESOLVE_LIB_DEFECTS // DR60. Do not change _M_gcount. // Clear eofbit per N3168. this->clear(this->rdstate() & ~ios_base::eofbit); sentry __cerb(*this, true); if (__cerb) { ios_base::iostate __err = ios_base::goodbit; __try { if (!this->fail()) { // 136. seekp, seekg setting wrong streams? const pos_type __p = this->rdbuf()->pubseekoff(__off, __dir, ios_base::in); // 129. Need error indication from seekp() and seekg() if (__p == pos_type(off_type(-1))) __err |= ios_base::failbit; } } __catch(__cxxabiv1::__forced_unwind&) { this->_M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { this->_M_setstate(ios_base::badbit); } if (__err) this->setstate(__err); } return *this; } // 27.6.1.2.3 Character extraction templates template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c) { typedef basic_istream<_CharT, _Traits> __istream_type; typedef typename __istream_type::int_type __int_type; typename __istream_type::sentry __cerb(__in, false); if (__cerb) { ios_base::iostate __err = ios_base::goodbit; __try { const __int_type __cb = __in.rdbuf()->sbumpc(); if (!_Traits::eq_int_type(__cb, _Traits::eof())) __c = _Traits::to_char_type(__cb); else __err |= (ios_base::eofbit | ios_base::failbit); } __catch(__cxxabiv1::__forced_unwind&) { __in._M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { __in._M_setstate(ios_base::badbit); } if (__err) __in.setstate(__err); } return __in; } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s) { typedef basic_istream<_CharT, _Traits> __istream_type; typedef basic_streambuf<_CharT, _Traits> __streambuf_type; typedef typename _Traits::int_type int_type; typedef _CharT char_type; typedef ctype<_CharT> __ctype_type; streamsize __extracted = 0; ios_base::iostate __err = ios_base::goodbit; typename __istream_type::sentry __cerb(__in, false); if (__cerb) { __try { // Figure out how many characters to extract. streamsize __num = __in.width(); if (__num <= 0) __num = __gnu_cxx::__numeric_traits<streamsize>::__max; const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc()); const int_type __eof = _Traits::eof(); __streambuf_type* __sb = __in.rdbuf(); int_type __c = __sb->sgetc(); while (__extracted < __num - 1 && !_Traits::eq_int_type(__c, __eof) && !__ct.is(ctype_base::space, _Traits::to_char_type(__c))) { *__s++ = _Traits::to_char_type(__c); ++__extracted; __c = __sb->snextc(); } if (_Traits::eq_int_type(__c, __eof)) __err |= ios_base::eofbit; // _GLIBCXX_RESOLVE_LIB_DEFECTS // 68. Extractors for char* should store null at end *__s = char_type(); __in.width(0); } __catch(__cxxabiv1::__forced_unwind&) { __in._M_setstate(ios_base::badbit); __throw_exception_again; } __catch(...) { __in._M_setstate(ios_base::badbit); } } if (!__extracted) __err |= ios_base::failbit; if (__err) __in.setstate(__err); return __in; } // 27.6.1.4 Standard basic_istream manipulators template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& ws(basic_istream<_CharT, _Traits>& __in) { typedef basic_istream<_CharT, _Traits> __istream_type; typedef basic_streambuf<_CharT, _Traits> __streambuf_type; typedef typename __istream_type::int_type __int_type; typedef ctype<_CharT> __ctype_type; const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc()); const __int_type __eof = _Traits::eof(); __streambuf_type* __sb = __in.rdbuf(); __int_type __c = __sb->sgetc(); while (!_Traits::eq_int_type(__c, __eof) && __ct.is(ctype_base::space, _Traits::to_char_type(__c))) __c = __sb->snextc(); if (_Traits::eq_int_type(__c, __eof)) __in.setstate(ios_base::eofbit); return __in; } // Inhibit implicit instantiations for required instantiations, // which are defined via explicit instantiations elsewhere. #if _GLIBCXX_EXTERN_TEMPLATE extern template class basic_istream<char>; extern template istream& ws(istream&); extern template istream& operator>>(istream&, char&); extern template istream& operator>>(istream&, char*); extern template istream& operator>>(istream&, unsigned char&); extern template istream& operator>>(istream&, signed char&); extern template istream& operator>>(istream&, unsigned char*); extern template istream& operator>>(istream&, signed char*); extern template istream& istream::_M_extract(unsigned short&); extern template istream& istream::_M_extract(unsigned int&); extern template istream& istream::_M_extract(long&); extern template istream& istream::_M_extract(unsigned long&); extern template istream& istream::_M_extract(bool&); #ifdef _GLIBCXX_USE_LONG_LONG extern template istream& istream::_M_extract(long long&); extern template istream& istream::_M_extract(unsigned long long&); #endif extern template istream& istream::_M_extract(float&); extern template istream& istream::_M_extract(double&); extern template istream& istream::_M_extract(long double&); extern template istream& istream::_M_extract(void*&); extern template class basic_iostream<char>; #ifdef _GLIBCXX_USE_WCHAR_T extern template class basic_istream<wchar_t>; extern template wistream& ws(wistream&); extern template wistream& operator>>(wistream&, wchar_t&); extern template wistream& operator>>(wistream&, wchar_t*); extern template wistream& wistream::_M_extract(unsigned short&); extern template wistream& wistream::_M_extract(unsigned int&); extern template wistream& wistream::_M_extract(long&); extern template wistream& wistream::_M_extract(unsigned long&); extern template wistream& wistream::_M_extract(bool&); #ifdef _GLIBCXX_USE_LONG_LONG extern template wistream& wistream::_M_extract(long long&); extern template wistream& wistream::_M_extract(unsigned long long&); #endif extern template wistream& wistream::_M_extract(float&); extern template wistream& wistream::_M_extract(double&); extern template wistream& wistream::_M_extract(long double&); extern template wistream& wistream::_M_extract(void*&); extern template class basic_iostream<wchar_t>; #endif #endif _GLIBCXX_END_NAMESPACE_VERSION } // namespace std #endif
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algorithmfwd.h
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alloc_traits.h
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allocator.h
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atomic_base.h
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atomic_futex.h
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atomic_lockfree_defines.h
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basic_ios.h
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basic_string.h
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basic_string.tcc
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boost_concept_check.h
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c++0x_warning.h
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char_traits.h
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concept_check.h
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cpp_type_traits.h
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cxxabi_init_exception.h
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deque.tcc
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enable_special_members.h
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exception.h
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exception_ptr.h
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forward_list.h
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fstream.tcc
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functional_hash.h
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hash_bytes.h
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hashtable.h
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hashtable_policy.h
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invoke.h
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ios_base.h
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localefwd.h
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memoryfwd.h
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ptr_traits.h
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quoted_string.h
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random.h
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random.tcc
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range_access.h
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refwrap.h
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regex.h
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regex.tcc
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regex_automaton.tcc
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regex_compiler.tcc
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regex_constants.h
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regex_error.h
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regex_executor.h
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regex_scanner.h
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shared_ptr.h
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shared_ptr_atomic.h
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shared_ptr_base.h
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specfun.h
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std_abs.h
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stl_construct.h
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