| // 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 |
