📄 istream.tcc
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{
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(...)
{ 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::iostate(ios_base::goodbit);
try
{
__streambuf_type* __sb = this->rdbuf();
if (__sb)
{
if (__sb->pubsync() == -1)
__err |= ios_base::badbit;
else
__ret = 0;
}
}
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);
try
{
if (!this->fail())
__ret = this->rdbuf()->pubseekoff(0, ios_base::cur, ios_base::in);
}
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.
ios_base::iostate __err = ios_base::iostate(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(...)
{ 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.
ios_base::iostate __err = ios_base::iostate(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(...)
{ 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::iostate(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(...)
{ __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 typename __istream_type::__streambuf_type __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::iostate(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 = numeric_limits<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(...)
{ __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 typename __istream_type::__streambuf_type __streambuf_type;
typedef typename __istream_type::__ctype_type __ctype_type;
typedef typename __istream_type::int_type __int_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;
}
// 21.3.7.9 basic_string::getline and operators
template<typename _CharT, typename _Traits, typename _Alloc>
basic_istream<_CharT, _Traits>&
operator>>(basic_istream<_CharT, _Traits>& __in,
basic_string<_CharT, _Traits, _Alloc>& __str)
{
typedef basic_istream<_CharT, _Traits> __istream_type;
typedef typename __istream_type::int_type __int_type;
typedef typename __istream_type::__streambuf_type __streambuf_type;
typedef typename __istream_type::__ctype_type __ctype_type;
typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
typedef typename __string_type::size_type __size_type;
__size_type __extracted = 0;
ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
typename __istream_type::sentry __cerb(__in, false);
if (__cerb)
{
try
{
// Avoid reallocation for common case.
__str.erase();
_CharT __buf[128];
__size_type __len = 0;
const streamsize __w = __in.width();
const __size_type __n = __w > 0 ? static_cast<__size_type>(__w)
: __str.max_size();
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 < __n
&& !_Traits::eq_int_type(__c, __eof)
&& !__ct.is(ctype_base::space, _Traits::to_char_type(__c)))
{
if (__len == sizeof(__buf) / sizeof(_CharT))
{
__str.append(__buf, sizeof(__buf) / sizeof(_CharT));
__len = 0;
}
__buf[__len++] = _Traits::to_char_type(__c);
++__extracted;
__c = __sb->snextc();
}
__str.append(__buf, __len);
if (_Traits::eq_int_type(__c, __eof))
__err |= ios_base::eofbit;
__in.width(0);
}
catch(...)
{
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 91. Description of operator>> and getline() for string<>
// might cause endless loop
__in._M_setstate(ios_base::badbit);
}
}
// 211. operator>>(istream&, string&) doesn't set failbit
if (!__extracted)
__err |= ios_base::failbit;
if (__err)
__in.setstate(__err);
return __in;
}
template<typename _CharT, typename _Traits, typename _Alloc>
basic_istream<_CharT, _Traits>&
getline(basic_istream<_CharT, _Traits>& __in,
basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim)
{
typedef basic_istream<_CharT, _Traits> __istream_type;
typedef typename __istream_type::int_type __int_type;
typedef typename __istream_type::__streambuf_type __streambuf_type;
typedef typename __istream_type::__ctype_type __ctype_type;
typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
typedef typename __string_type::size_type __size_type;
__size_type __extracted = 0;
const __size_type __n = __str.max_size();
ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
typename __istream_type::sentry __cerb(__in, true);
if (__cerb)
{
try
{
// Avoid reallocation for common case.
__str.erase();
_CharT __buf[128];
__size_type __len = 0;
const __int_type __idelim = _Traits::to_int_type(__delim);
const __int_type __eof = _Traits::eof();
__streambuf_type* __sb = __in.rdbuf();
__int_type __c = __sb->sgetc();
while (__extracted < __n
&& !_Traits::eq_int_type(__c, __eof)
&& !_Traits::eq_int_type(__c, __idelim))
{
if (__len == sizeof(__buf) / sizeof(_CharT))
{
__str.append(__buf, sizeof(__buf) / sizeof(_CharT));
__len = 0;
}
__buf[__len++] = _Traits::to_char_type(__c);
++__extracted;
__c = __sb->snextc();
}
__str.append(__buf, __len);
if (_Traits::eq_int_type(__c, __eof))
__err |= ios_base::eofbit;
else if (_Traits::eq_int_type(__c, __idelim))
{
++__extracted;
__sb->sbumpc();
}
else
__err |= ios_base::failbit;
}
catch(...)
{
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 91. Description of operator>> and getline() for string<>
// might cause endless loop
__in._M_setstate(ios_base::badbit);
}
}
if (!__extracted)
__err |= ios_base::failbit;
if (__err)
__in.setstate(__err);
return __in;
}
template<class _CharT, class _Traits, class _Alloc>
inline basic_istream<_CharT,_Traits>&
getline(basic_istream<_CharT, _Traits>& __in,
basic_string<_CharT,_Traits,_Alloc>& __str)
{ return getline(__in, __str, __in.widen('\n')); }
// Inhibit implicit instantiations for required instantiations,
// which are defined via explicit instantiations elsewhere.
// NB: This syntax is a GNU extension.
#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 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 class basic_iostream<wchar_t>;
#endif
#endif
} // namespace std
#endif
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