maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/libcxx/include/istream

1639 lines
47 KiB
C++
Raw Blame History

// -*- C++ -*-
//===--------------------------- istream ----------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_ISTREAM
#define _LIBCPP_ISTREAM
/*
istream synopsis
template <class charT, class traits = char_traits<charT> >
class basic_istream
: virtual public basic_ios<charT,traits>
{
public:
// types (inherited from basic_ios (27.5.4)):
typedef charT char_type;
typedef traits traits_type;
typedef typename traits_type::int_type int_type;
typedef typename traits_type::pos_type pos_type;
typedef typename traits_type::off_type off_type;
// 27.7.1.1.1 Constructor/destructor:
explicit basic_istream(basic_streambuf<char_type, traits_type>* sb);
basic_istream(basic_istream&& rhs);
virtual ~basic_istream();
// 27.7.1.1.2 Assign/swap:
basic_istream& operator=(basic_istream&& rhs);
void swap(basic_istream& rhs);
// 27.7.1.1.3 Prefix/suffix:
class sentry;
// 27.7.1.2 Formatted input:
basic_istream& operator>>(basic_istream& (*pf)(basic_istream&));
basic_istream& operator>>(basic_ios<char_type, traits_type>&
(*pf)(basic_ios<char_type, traits_type>&));
basic_istream& operator>>(ios_base& (*pf)(ios_base&));
basic_istream& operator>>(basic_streambuf<char_type, traits_type>* sb);
basic_istream& operator>>(bool& n);
basic_istream& operator>>(short& n);
basic_istream& operator>>(unsigned short& n);
basic_istream& operator>>(int& n);
basic_istream& operator>>(unsigned int& n);
basic_istream& operator>>(long& n);
basic_istream& operator>>(unsigned long& n);
basic_istream& operator>>(long long& n);
basic_istream& operator>>(unsigned long long& n);
basic_istream& operator>>(float& f);
basic_istream& operator>>(double& f);
basic_istream& operator>>(long double& f);
basic_istream& operator>>(void*& p);
// 27.7.1.3 Unformatted input:
streamsize gcount() const;
int_type get();
basic_istream& get(char_type& c);
basic_istream& get(char_type* s, streamsize n);
basic_istream& get(char_type* s, streamsize n, char_type delim);
basic_istream& get(basic_streambuf<char_type,traits_type>& sb);
basic_istream& get(basic_streambuf<char_type,traits_type>& sb, char_type delim);
basic_istream& getline(char_type* s, streamsize n);
basic_istream& getline(char_type* s, streamsize n, char_type delim);
basic_istream& ignore(streamsize n = 1, int_type delim = traits_type::eof());
int_type peek();
basic_istream& read (char_type* s, streamsize n);
streamsize readsome(char_type* s, streamsize n);
basic_istream& putback(char_type c);
basic_istream& unget();
int sync();
pos_type tellg();
basic_istream& seekg(pos_type);
basic_istream& seekg(off_type, ios_base::seekdir);
protected:
basic_istream(const basic_istream& rhs) = delete;
basic_istream(basic_istream&& rhs);
// 27.7.2.1.2 Assign/swap:
basic_istream& operator=(const basic_istream& rhs) = delete;
basic_istream& operator=(basic_istream&& rhs);
void swap(basic_istream& rhs);
};
// 27.7.1.2.3 character extraction templates:
template<class charT, class traits>
basic_istream<charT,traits>& operator>>(basic_istream<charT,traits>&, charT&);
template<class traits>
basic_istream<char,traits>& operator>>(basic_istream<char,traits>&, unsigned char&);
template<class traits>
basic_istream<char,traits>& operator>>(basic_istream<char,traits>&, signed char&);
template<class charT, class traits>
basic_istream<charT,traits>& operator>>(basic_istream<charT,traits>&, charT*);
template<class traits>
basic_istream<char,traits>& operator>>(basic_istream<char,traits>&, unsigned char*);
template<class traits>
basic_istream<char,traits>& operator>>(basic_istream<char,traits>&, signed char*);
template <class charT, class traits>
void
swap(basic_istream<charT, traits>& x, basic_istream<charT, traits>& y);
typedef basic_istream<char> istream;
typedef basic_istream<wchar_t> wistream;
template <class charT, class traits = char_traits<charT> >
class basic_iostream :
public basic_istream<charT,traits>,
public basic_ostream<charT,traits>
{
public:
// types:
typedef charT char_type;
typedef traits traits_type;
typedef typename traits_type::int_type int_type;
typedef typename traits_type::pos_type pos_type;
typedef typename traits_type::off_type off_type;
// constructor/destructor
explicit basic_iostream(basic_streambuf<char_type, traits_type>* sb);
basic_iostream(basic_iostream&& rhs);
virtual ~basic_iostream();
// assign/swap
basic_iostream& operator=(basic_iostream&& rhs);
void swap(basic_iostream& rhs);
};
template <class charT, class traits>
void
swap(basic_iostream<charT, traits>& x, basic_iostream<charT, traits>& y);
typedef basic_iostream<char> iostream;
typedef basic_iostream<wchar_t> wiostream;
template <class charT, class traits>
basic_istream<charT,traits>&
ws(basic_istream<charT,traits>& is);
// rvalue stream extraction
template <class Stream, class T>
Stream&& operator>>(Stream&& is, T&& x);
} // std
*/
#include <__config>
#include <__utility/forward.h>
#include <ostream>
#include <version>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif
_LIBCPP_PUSH_MACROS
#include <__undef_macros>
_LIBCPP_BEGIN_NAMESPACE_STD
template <class _CharT, class _Traits>
class _LIBCPP_TEMPLATE_VIS basic_istream
: virtual public basic_ios<_CharT, _Traits>
{
streamsize __gc_;
public:
// types (inherited from basic_ios (27.5.4)):
typedef _CharT char_type;
typedef _Traits traits_type;
typedef typename traits_type::int_type int_type;
typedef typename traits_type::pos_type pos_type;
typedef typename traits_type::off_type off_type;
// 27.7.1.1.1 Constructor/destructor:
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
explicit basic_istream(basic_streambuf<char_type, traits_type>* __sb) : __gc_(0)
{ this->init(__sb); }
virtual ~basic_istream();
protected:
inline _LIBCPP_INLINE_VISIBILITY
basic_istream(basic_istream&& __rhs);
// 27.7.1.1.2 Assign/swap:
inline _LIBCPP_INLINE_VISIBILITY
basic_istream& operator=(basic_istream&& __rhs);
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
void swap(basic_istream& __rhs) {
_VSTD::swap(__gc_, __rhs.__gc_);
basic_ios<char_type, traits_type>::swap(__rhs);
}
basic_istream (const basic_istream& __rhs) = delete;
basic_istream& operator=(const basic_istream& __rhs) = delete;
public:
// 27.7.1.1.3 Prefix/suffix:
class _LIBCPP_TEMPLATE_VIS sentry;
// 27.7.1.2 Formatted input:
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
basic_istream& operator>>(basic_istream& (*__pf)(basic_istream&))
{ return __pf(*this); }
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
basic_istream& operator>>(basic_ios<char_type, traits_type>&
(*__pf)(basic_ios<char_type, traits_type>&))
{ __pf(*this); return *this; }
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
basic_istream& operator>>(ios_base& (*__pf)(ios_base&))
{ __pf(*this); return *this; }
basic_istream& operator>>(basic_streambuf<char_type, traits_type>* __sb);
basic_istream& operator>>(bool& __n);
basic_istream& operator>>(short& __n);
basic_istream& operator>>(unsigned short& __n);
basic_istream& operator>>(int& __n);
basic_istream& operator>>(unsigned int& __n);
basic_istream& operator>>(long& __n);
basic_istream& operator>>(unsigned long& __n);
basic_istream& operator>>(long long& __n);
basic_istream& operator>>(unsigned long long& __n);
basic_istream& operator>>(float& __f);
basic_istream& operator>>(double& __f);
basic_istream& operator>>(long double& __f);
basic_istream& operator>>(void*& __p);
// 27.7.1.3 Unformatted input:
_LIBCPP_INLINE_VISIBILITY
streamsize gcount() const {return __gc_;}
int_type get();
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
basic_istream& get(char_type& __c) {
int_type __ch = get();
if (__ch != traits_type::eof())
__c = traits_type::to_char_type(__ch);
return *this;
}
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
basic_istream& get(char_type* __s, streamsize __n)
{ return get(__s, __n, this->widen('\n')); }
basic_istream& get(char_type* __s, streamsize __n, char_type __dlm);
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
basic_istream& get(basic_streambuf<char_type, traits_type>& __sb)
{ return get(__sb, this->widen('\n')); }
basic_istream& get(basic_streambuf<char_type, traits_type>& __sb, char_type __dlm);
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
basic_istream& getline(char_type* __s, streamsize __n)
{ return getline(__s, __n, this->widen('\n')); }
basic_istream& getline(char_type* __s, streamsize __n, char_type __dlm);
basic_istream& ignore(streamsize __n = 1, int_type __dlm = traits_type::eof());
int_type peek();
basic_istream& read (char_type* __s, streamsize __n);
streamsize readsome(char_type* __s, streamsize __n);
basic_istream& putback(char_type __c);
basic_istream& unget();
int sync();
pos_type tellg();
basic_istream& seekg(pos_type __pos);
basic_istream& seekg(off_type __off, ios_base::seekdir __dir);
};
template <class _CharT, class _Traits>
class _LIBCPP_TEMPLATE_VIS basic_istream<_CharT, _Traits>::sentry
{
bool __ok_;
sentry(const sentry&); // = delete;
sentry& operator=(const sentry&); // = delete;
public:
explicit sentry(basic_istream<_CharT, _Traits>& __is, bool __noskipws = false);
// ~sentry() = default;
_LIBCPP_INLINE_VISIBILITY
explicit operator bool() const {return __ok_;}
};
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>::sentry::sentry(basic_istream<_CharT, _Traits>& __is,
bool __noskipws)
: __ok_(false)
{
if (__is.good())
{
if (__is.tie())
__is.tie()->flush();
if (!__noskipws && (__is.flags() & ios_base::skipws))
{
typedef istreambuf_iterator<_CharT, _Traits> _Ip;
const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__is.getloc());
_Ip __i(__is);
_Ip __eof;
for (; __i != __eof; ++__i)
if (!__ct.is(__ct.space, *__i))
break;
if (__i == __eof)
__is.setstate(ios_base::failbit | ios_base::eofbit);
}
__ok_ = __is.good();
}
else
__is.setstate(ios_base::failbit);
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>::basic_istream(basic_istream&& __rhs)
: __gc_(__rhs.__gc_)
{
__rhs.__gc_ = 0;
this->move(__rhs);
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator=(basic_istream&& __rhs)
{
swap(__rhs);
return *this;
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>::~basic_istream()
{
}
template <class _Tp, class _CharT, class _Traits>
_LIBCPP_INLINE_VISIBILITY
basic_istream<_CharT, _Traits>&
__input_arithmetic(basic_istream<_CharT, _Traits>& __is, _Tp& __n) {
ios_base::iostate __state = ios_base::goodbit;
typename basic_istream<_CharT, _Traits>::sentry __s(__is);
if (__s)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
typedef istreambuf_iterator<_CharT, _Traits> _Ip;
typedef num_get<_CharT, _Ip> _Fp;
use_facet<_Fp>(__is.getloc()).get(_Ip(__is), _Ip(), __is, __state, __n);
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
__is.__setstate_nothrow(__state);
if (__is.exceptions() & ios_base::badbit)
{
throw;
}
}
#endif
__is.setstate(__state);
}
return __is;
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator>>(unsigned short& __n)
{
return _VSTD::__input_arithmetic<unsigned short>(*this, __n);
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator>>(unsigned int& __n)
{
return _VSTD::__input_arithmetic<unsigned int>(*this, __n);
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator>>(long& __n)
{
return _VSTD::__input_arithmetic<long>(*this, __n);
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator>>(unsigned long& __n)
{
return _VSTD::__input_arithmetic<unsigned long>(*this, __n);
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator>>(long long& __n)
{
return _VSTD::__input_arithmetic<long long>(*this, __n);
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator>>(unsigned long long& __n)
{
return _VSTD::__input_arithmetic<unsigned long long>(*this, __n);
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator>>(float& __n)
{
return _VSTD::__input_arithmetic<float>(*this, __n);
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator>>(double& __n)
{
return _VSTD::__input_arithmetic<double>(*this, __n);
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator>>(long double& __n)
{
return _VSTD::__input_arithmetic<long double>(*this, __n);
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator>>(bool& __n)
{
return _VSTD::__input_arithmetic<bool>(*this, __n);
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator>>(void*& __n)
{
return _VSTD::__input_arithmetic<void*>(*this, __n);
}
template <class _Tp, class _CharT, class _Traits>
_LIBCPP_INLINE_VISIBILITY
basic_istream<_CharT, _Traits>&
__input_arithmetic_with_numeric_limits(basic_istream<_CharT, _Traits>& __is, _Tp& __n) {
ios_base::iostate __state = ios_base::goodbit;
typename basic_istream<_CharT, _Traits>::sentry __s(__is);
if (__s)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
typedef istreambuf_iterator<_CharT, _Traits> _Ip;
typedef num_get<_CharT, _Ip> _Fp;
long __temp;
use_facet<_Fp>(__is.getloc()).get(_Ip(__is), _Ip(), __is, __state, __temp);
if (__temp < numeric_limits<_Tp>::min())
{
__state |= ios_base::failbit;
__n = numeric_limits<_Tp>::min();
}
else if (__temp > numeric_limits<_Tp>::max())
{
__state |= ios_base::failbit;
__n = numeric_limits<_Tp>::max();
}
else
{
__n = static_cast<_Tp>(__temp);
}
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
__is.__setstate_nothrow(__state);
if (__is.exceptions() & ios_base::badbit)
{
throw;
}
}
#endif // _LIBCPP_NO_EXCEPTIONS
__is.setstate(__state);
}
return __is;
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator>>(short& __n)
{
return _VSTD::__input_arithmetic_with_numeric_limits<short>(*this, __n);
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator>>(int& __n)
{
return _VSTD::__input_arithmetic_with_numeric_limits<int>(*this, __n);
}
template<class _CharT, class _Traits>
_LIBCPP_INLINE_VISIBILITY
basic_istream<_CharT, _Traits>&
__input_c_string(basic_istream<_CharT, _Traits>& __is, _CharT* __p, size_t __n)
{
ios_base::iostate __state = ios_base::goodbit;
typename basic_istream<_CharT, _Traits>::sentry __sen(__is);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif
_CharT* __s = __p;
const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__is.getloc());
while (__s != __p + (__n-1))
{
typename _Traits::int_type __i = __is.rdbuf()->sgetc();
if (_Traits::eq_int_type(__i, _Traits::eof()))
{
__state |= ios_base::eofbit;
break;
}
_CharT __ch = _Traits::to_char_type(__i);
if (__ct.is(__ct.space, __ch))
break;
*__s++ = __ch;
__is.rdbuf()->sbumpc();
}
*__s = _CharT();
__is.width(0);
if (__s == __p)
__state |= ios_base::failbit;
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
__is.__setstate_nothrow(__state);
if (__is.exceptions() & ios_base::badbit)
{
throw;
}
}
#endif
__is.setstate(__state);
}
return __is;
}
#if _LIBCPP_STD_VER > 17
template<class _CharT, class _Traits, size_t _Np>
inline _LIBCPP_INLINE_VISIBILITY
basic_istream<_CharT, _Traits>&
operator>>(basic_istream<_CharT, _Traits>& __is, _CharT (&__buf)[_Np])
{
size_t __n = _Np;
if (__is.width() > 0)
__n = _VSTD::min(size_t(__is.width()), _Np);
return _VSTD::__input_c_string(__is, __buf, __n);
}
template<class _Traits, size_t _Np>
inline _LIBCPP_INLINE_VISIBILITY
basic_istream<char, _Traits>&
operator>>(basic_istream<char, _Traits>& __is, unsigned char (&__buf)[_Np])
{
return __is >> (char(&)[_Np])__buf;
}
template<class _Traits, size_t _Np>
inline _LIBCPP_INLINE_VISIBILITY
basic_istream<char, _Traits>&
operator>>(basic_istream<char, _Traits>& __is, signed char (&__buf)[_Np])
{
return __is >> (char(&)[_Np])__buf;
}
#else
template<class _CharT, class _Traits>
inline _LIBCPP_INLINE_VISIBILITY
basic_istream<_CharT, _Traits>&
operator>>(basic_istream<_CharT, _Traits>& __is, _CharT* __s)
{
streamsize __n = __is.width();
if (__n <= 0)
__n = numeric_limits<streamsize>::max() / sizeof(_CharT) - 1;
return _VSTD::__input_c_string(__is, __s, size_t(__n));
}
template<class _Traits>
inline _LIBCPP_INLINE_VISIBILITY
basic_istream<char, _Traits>&
operator>>(basic_istream<char, _Traits>& __is, unsigned char* __s)
{
return __is >> (char*)__s;
}
template<class _Traits>
inline _LIBCPP_INLINE_VISIBILITY
basic_istream<char, _Traits>&
operator>>(basic_istream<char, _Traits>& __is, signed char* __s)
{
return __is >> (char*)__s;
}
#endif // _LIBCPP_STD_VER > 17
template<class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
operator>>(basic_istream<_CharT, _Traits>& __is, _CharT& __c)
{
ios_base::iostate __state = ios_base::goodbit;
typename basic_istream<_CharT, _Traits>::sentry __sen(__is);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif
typename _Traits::int_type __i = __is.rdbuf()->sbumpc();
if (_Traits::eq_int_type(__i, _Traits::eof()))
__state |= ios_base::eofbit | ios_base::failbit;
else
__c = _Traits::to_char_type(__i);
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
__is.__setstate_nothrow(__state);
if (__is.exceptions() & ios_base::badbit)
{
throw;
}
}
#endif
__is.setstate(__state);
}
return __is;
}
template<class _Traits>
inline _LIBCPP_INLINE_VISIBILITY
basic_istream<char, _Traits>&
operator>>(basic_istream<char, _Traits>& __is, unsigned char& __c)
{
return __is >> (char&)__c;
}
template<class _Traits>
inline _LIBCPP_INLINE_VISIBILITY
basic_istream<char, _Traits>&
operator>>(basic_istream<char, _Traits>& __is, signed char& __c)
{
return __is >> (char&)__c;
}
template<class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::operator>>(basic_streambuf<char_type, traits_type>* __sb)
{
ios_base::iostate __state = ios_base::goodbit;
__gc_ = 0;
sentry __s(*this, true);
if (__s)
{
if (__sb)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
while (true)
{
typename traits_type::int_type __i = this->rdbuf()->sgetc();
if (traits_type::eq_int_type(__i, _Traits::eof()))
{
__state |= ios_base::eofbit;
break;
}
if (traits_type::eq_int_type(
__sb->sputc(traits_type::to_char_type(__i)),
traits_type::eof()))
break;
++__gc_;
this->rdbuf()->sbumpc();
}
if (__gc_ == 0)
__state |= ios_base::failbit;
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
if (__gc_ == 0)
__state |= ios_base::failbit;
this->__setstate_nothrow(__state);
if (this->exceptions() & ios_base::failbit || this->exceptions() & ios_base::badbit)
{
throw;
}
}
#endif // _LIBCPP_NO_EXCEPTIONS
}
else
{
__state |= ios_base::failbit;
}
this->setstate(__state);
}
return *this;
}
template<class _CharT, class _Traits>
typename basic_istream<_CharT, _Traits>::int_type
basic_istream<_CharT, _Traits>::get()
{
ios_base::iostate __state = ios_base::goodbit;
__gc_ = 0;
int_type __r = traits_type::eof();
sentry __s(*this, true);
if (__s)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif
__r = this->rdbuf()->sbumpc();
if (traits_type::eq_int_type(__r, traits_type::eof()))
__state |= ios_base::failbit | ios_base::eofbit;
else
__gc_ = 1;
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
this->__setstate_nothrow(this->rdstate() | ios_base::badbit);
if (this->exceptions() & ios_base::badbit)
{
throw;
}
}
#endif
this->setstate(__state);
}
return __r;
}
template<class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::get(char_type* __s, streamsize __n, char_type __dlm)
{
ios_base::iostate __state = ios_base::goodbit;
__gc_ = 0;
sentry __sen(*this, true);
if (__sen)
{
if (__n > 0)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif
while (__gc_ < __n-1)
{
int_type __i = this->rdbuf()->sgetc();
if (traits_type::eq_int_type(__i, traits_type::eof()))
{
__state |= ios_base::eofbit;
break;
}
char_type __ch = traits_type::to_char_type(__i);
if (traits_type::eq(__ch, __dlm))
break;
*__s++ = __ch;
++__gc_;
this->rdbuf()->sbumpc();
}
if (__gc_ == 0)
__state |= ios_base::failbit;
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
this->__setstate_nothrow(__state);
if (this->exceptions() & ios_base::badbit)
{
if (__n > 0)
*__s = char_type();
throw;
}
}
#endif
}
else
{
__state |= ios_base::failbit;
}
if (__n > 0)
*__s = char_type();
this->setstate(__state);
}
if (__n > 0)
*__s = char_type();
return *this;
}
template<class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::get(basic_streambuf<char_type, traits_type>& __sb,
char_type __dlm)
{
ios_base::iostate __state = ios_base::goodbit;
__gc_ = 0;
sentry __sen(*this, true);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
while (true)
{
typename traits_type::int_type __i = this->rdbuf()->sgetc();
if (traits_type::eq_int_type(__i, traits_type::eof()))
{
__state |= ios_base::eofbit;
break;
}
char_type __ch = traits_type::to_char_type(__i);
if (traits_type::eq(__ch, __dlm))
break;
if (traits_type::eq_int_type(__sb.sputc(__ch), traits_type::eof()))
break;
++__gc_;
this->rdbuf()->sbumpc();
}
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
// according to the spec, exceptions here are caught but not rethrown
}
#endif // _LIBCPP_NO_EXCEPTIONS
if (__gc_ == 0)
__state |= ios_base::failbit;
this->setstate(__state);
}
return *this;
}
template<class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::getline(char_type* __s, streamsize __n, char_type __dlm)
{
ios_base::iostate __state = ios_base::goodbit;
__gc_ = 0;
sentry __sen(*this, true);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
while (true)
{
typename traits_type::int_type __i = this->rdbuf()->sgetc();
if (traits_type::eq_int_type(__i, traits_type::eof()))
{
__state |= ios_base::eofbit;
break;
}
char_type __ch = traits_type::to_char_type(__i);
if (traits_type::eq(__ch, __dlm))
{
this->rdbuf()->sbumpc();
++__gc_;
break;
}
if (__gc_ >= __n-1)
{
__state |= ios_base::failbit;
break;
}
*__s++ = __ch;
this->rdbuf()->sbumpc();
++__gc_;
}
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
this->__setstate_nothrow(__state);
if (this->exceptions() & ios_base::badbit)
{
if (__n > 0)
*__s = char_type();
if (__gc_ == 0)
__state |= ios_base::failbit;
throw;
}
}
#endif // _LIBCPP_NO_EXCEPTIONS
}
if (__n > 0)
*__s = char_type();
if (__gc_ == 0)
__state |= ios_base::failbit;
this->setstate(__state);
return *this;
}
template<class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::ignore(streamsize __n, int_type __dlm)
{
ios_base::iostate __state = ios_base::goodbit;
__gc_ = 0;
sentry __sen(*this, true);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
if (__n == numeric_limits<streamsize>::max())
{
while (true)
{
typename traits_type::int_type __i = this->rdbuf()->sbumpc();
if (traits_type::eq_int_type(__i, traits_type::eof()))
{
__state |= ios_base::eofbit;
break;
}
++__gc_;
if (traits_type::eq_int_type(__i, __dlm))
break;
}
}
else
{
while (__gc_ < __n)
{
typename traits_type::int_type __i = this->rdbuf()->sbumpc();
if (traits_type::eq_int_type(__i, traits_type::eof()))
{
__state |= ios_base::eofbit;
break;
}
++__gc_;
if (traits_type::eq_int_type(__i, __dlm))
break;
}
}
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
this->__setstate_nothrow(__state);
if (this->exceptions() & ios_base::badbit)
{
throw;
}
}
#endif // _LIBCPP_NO_EXCEPTIONS
this->setstate(__state);
}
return *this;
}
template<class _CharT, class _Traits>
typename basic_istream<_CharT, _Traits>::int_type
basic_istream<_CharT, _Traits>::peek()
{
ios_base::iostate __state = ios_base::goodbit;
__gc_ = 0;
int_type __r = traits_type::eof();
sentry __sen(*this, true);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
__r = this->rdbuf()->sgetc();
if (traits_type::eq_int_type(__r, traits_type::eof()))
__state |= ios_base::eofbit;
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
this->__setstate_nothrow(__state);
if (this->exceptions() & ios_base::badbit)
{
throw;
}
}
#endif // _LIBCPP_NO_EXCEPTIONS
this->setstate(__state);
}
return __r;
}
template<class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::read(char_type* __s, streamsize __n)
{
ios_base::iostate __state = ios_base::goodbit;
__gc_ = 0;
sentry __sen(*this, true);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
__gc_ = this->rdbuf()->sgetn(__s, __n);
if (__gc_ != __n)
__state |= ios_base::failbit | ios_base::eofbit;
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
this->__setstate_nothrow(__state);
if (this->exceptions() & ios_base::badbit)
{
throw;
}
}
#endif // _LIBCPP_NO_EXCEPTIONS
}
else
{
__state |= ios_base::failbit;
}
this->setstate(__state);
return *this;
}
template<class _CharT, class _Traits>
streamsize
basic_istream<_CharT, _Traits>::readsome(char_type* __s, streamsize __n)
{
ios_base::iostate __state = ios_base::goodbit;
__gc_ = 0;
sentry __sen(*this, true);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
streamsize __c = this->rdbuf()->in_avail();
switch (__c)
{
case -1:
__state |= ios_base::eofbit;
break;
case 0:
break;
default:
__n = _VSTD::min(__c, __n);
__gc_ = this->rdbuf()->sgetn(__s, __n);
if (__gc_ != __n)
__state |= ios_base::failbit | ios_base::eofbit;
break;
}
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
this->__setstate_nothrow(__state);
if (this->exceptions() & ios_base::badbit)
{
throw;
}
}
#endif // _LIBCPP_NO_EXCEPTIONS
}
else
{
__state |= ios_base::failbit;
}
this->setstate(__state);
return __gc_;
}
template<class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::putback(char_type __c)
{
ios_base::iostate __state = this->rdstate() & ~ios_base::eofbit;
__gc_ = 0;
this->clear(__state);
sentry __sen(*this, true);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
if (this->rdbuf() == nullptr || this->rdbuf()->sputbackc(__c) == traits_type::eof())
__state |= ios_base::badbit;
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
this->__setstate_nothrow(__state);
if (this->exceptions() & ios_base::badbit)
{
throw;
}
}
#endif // _LIBCPP_NO_EXCEPTIONS
}
else
{
__state |= ios_base::failbit;
}
this->setstate(__state);
return *this;
}
template<class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::unget()
{
ios_base::iostate __state = this->rdstate() & ~ios_base::eofbit;
__gc_ = 0;
this->clear(__state);
sentry __sen(*this, true);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
if (this->rdbuf() == nullptr || this->rdbuf()->sungetc() == traits_type::eof())
__state |= ios_base::badbit;
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
this->__setstate_nothrow(__state);
if (this->exceptions() & ios_base::badbit)
{
throw;
}
}
#endif // _LIBCPP_NO_EXCEPTIONS
}
else
{
__state |= ios_base::failbit;
}
this->setstate(__state);
return *this;
}
template<class _CharT, class _Traits>
int
basic_istream<_CharT, _Traits>::sync()
{
ios_base::iostate __state = ios_base::goodbit;
int __r = 0;
sentry __sen(*this, true);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
if (this->rdbuf() == nullptr)
return -1;
if (this->rdbuf()->pubsync() == -1)
{
__state |= ios_base::badbit;
return -1;
}
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
this->__setstate_nothrow(__state);
if (this->exceptions() & ios_base::badbit)
{
throw;
}
}
#endif // _LIBCPP_NO_EXCEPTIONS
this->setstate(__state);
}
return __r;
}
template<class _CharT, class _Traits>
typename basic_istream<_CharT, _Traits>::pos_type
basic_istream<_CharT, _Traits>::tellg()
{
ios_base::iostate __state = ios_base::goodbit;
pos_type __r(-1);
sentry __sen(*this, true);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
__r = this->rdbuf()->pubseekoff(0, ios_base::cur, ios_base::in);
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
this->__setstate_nothrow(__state);
if (this->exceptions() & ios_base::badbit)
{
throw;
}
}
#endif // _LIBCPP_NO_EXCEPTIONS
this->setstate(__state);
}
return __r;
}
template<class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::seekg(pos_type __pos)
{
ios_base::iostate __state = this->rdstate() & ~ios_base::eofbit;
this->clear(__state);
sentry __sen(*this, true);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
if (this->rdbuf()->pubseekpos(__pos, ios_base::in) == pos_type(-1))
__state |= ios_base::failbit;
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
this->__setstate_nothrow(__state);
if (this->exceptions() & ios_base::badbit)
{
throw;
}
}
#endif // _LIBCPP_NO_EXCEPTIONS
this->setstate(__state);
}
return *this;
}
template<class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
basic_istream<_CharT, _Traits>::seekg(off_type __off, ios_base::seekdir __dir)
{
ios_base::iostate __state = this->rdstate() & ~ios_base::eofbit;
this->clear(__state);
sentry __sen(*this, true);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
if (this->rdbuf()->pubseekoff(__off, __dir, ios_base::in) == pos_type(-1))
__state |= ios_base::failbit;
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
this->__setstate_nothrow(__state);
if (this->exceptions() & ios_base::badbit)
{
throw;
}
}
#endif // _LIBCPP_NO_EXCEPTIONS
this->setstate(__state);
}
return *this;
}
template <class _CharT, class _Traits>
basic_istream<_CharT, _Traits>&
ws(basic_istream<_CharT, _Traits>& __is)
{
ios_base::iostate __state = ios_base::goodbit;
typename basic_istream<_CharT, _Traits>::sentry __sen(__is, true);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__is.getloc());
while (true)
{
typename _Traits::int_type __i = __is.rdbuf()->sgetc();
if (_Traits::eq_int_type(__i, _Traits::eof()))
{
__state |= ios_base::eofbit;
break;
}
if (!__ct.is(__ct.space, _Traits::to_char_type(__i)))
break;
__is.rdbuf()->sbumpc();
}
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
__is.__setstate_nothrow(__state);
if (__is.exceptions() & ios_base::badbit)
{
throw;
}
}
#endif // _LIBCPP_NO_EXCEPTIONS
__is.setstate(__state);
}
return __is;
}
template <class _Stream, class _Tp, class = void>
struct __is_istreamable : false_type { };
template <class _Stream, class _Tp>
struct __is_istreamable<_Stream, _Tp, decltype(
declval<_Stream>() >> declval<_Tp>(), void()
)> : true_type { };
template <class _Stream, class _Tp, class = typename enable_if<
_And<is_base_of<ios_base, _Stream>,
__is_istreamable<_Stream&, _Tp&&> >::value
>::type>
_LIBCPP_INLINE_VISIBILITY
_Stream&& operator>>(_Stream&& __is, _Tp&& __x)
{
__is >> _VSTD::forward<_Tp>(__x);
return _VSTD::move(__is);
}
template <class _CharT, class _Traits>
class _LIBCPP_TEMPLATE_VIS basic_iostream
: public basic_istream<_CharT, _Traits>,
public basic_ostream<_CharT, _Traits>
{
public:
// types:
typedef _CharT char_type;
typedef _Traits traits_type;
typedef typename traits_type::int_type int_type;
typedef typename traits_type::pos_type pos_type;
typedef typename traits_type::off_type off_type;
// constructor/destructor
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
explicit basic_iostream(basic_streambuf<char_type, traits_type>* __sb)
: basic_istream<_CharT, _Traits>(__sb)
{}
virtual ~basic_iostream();
protected:
inline _LIBCPP_INLINE_VISIBILITY
basic_iostream(basic_iostream&& __rhs);
// assign/swap
inline _LIBCPP_INLINE_VISIBILITY
basic_iostream& operator=(basic_iostream&& __rhs);
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
void swap(basic_iostream& __rhs)
{ basic_istream<char_type, traits_type>::swap(__rhs); }
};
template <class _CharT, class _Traits>
basic_iostream<_CharT, _Traits>::basic_iostream(basic_iostream&& __rhs)
: basic_istream<_CharT, _Traits>(_VSTD::move(__rhs))
{
}
template <class _CharT, class _Traits>
basic_iostream<_CharT, _Traits>&
basic_iostream<_CharT, _Traits>::operator=(basic_iostream&& __rhs)
{
swap(__rhs);
return *this;
}
template <class _CharT, class _Traits>
basic_iostream<_CharT, _Traits>::~basic_iostream()
{
}
template<class _CharT, class _Traits, class _Allocator>
basic_istream<_CharT, _Traits>&
operator>>(basic_istream<_CharT, _Traits>& __is,
basic_string<_CharT, _Traits, _Allocator>& __str)
{
ios_base::iostate __state = ios_base::goodbit;
typename basic_istream<_CharT, _Traits>::sentry __sen(__is);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif
__str.clear();
streamsize __n = __is.width();
if (__n <= 0)
__n = __str.max_size();
if (__n <= 0)
__n = numeric_limits<streamsize>::max();
streamsize __c = 0;
const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__is.getloc());
while (__c < __n)
{
typename _Traits::int_type __i = __is.rdbuf()->sgetc();
if (_Traits::eq_int_type(__i, _Traits::eof()))
{
__state |= ios_base::eofbit;
break;
}
_CharT __ch = _Traits::to_char_type(__i);
if (__ct.is(__ct.space, __ch))
break;
__str.push_back(__ch);
++__c;
__is.rdbuf()->sbumpc();
}
__is.width(0);
if (__c == 0)
__state |= ios_base::failbit;
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
__is.__setstate_nothrow(__state);
if (__is.exceptions() & ios_base::badbit)
{
throw;
}
}
#endif
__is.setstate(__state);
}
return __is;
}
template<class _CharT, class _Traits, class _Allocator>
basic_istream<_CharT, _Traits>&
getline(basic_istream<_CharT, _Traits>& __is,
basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm)
{
ios_base::iostate __state = ios_base::goodbit;
typename basic_istream<_CharT, _Traits>::sentry __sen(__is, true);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif
__str.clear();
streamsize __extr = 0;
while (true)
{
typename _Traits::int_type __i = __is.rdbuf()->sbumpc();
if (_Traits::eq_int_type(__i, _Traits::eof()))
{
__state |= ios_base::eofbit;
break;
}
++__extr;
_CharT __ch = _Traits::to_char_type(__i);
if (_Traits::eq(__ch, __dlm))
break;
__str.push_back(__ch);
if (__str.size() == __str.max_size())
{
__state |= ios_base::failbit;
break;
}
}
if (__extr == 0)
__state |= ios_base::failbit;
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
__is.__setstate_nothrow(__state);
if (__is.exceptions() & ios_base::badbit)
{
throw;
}
}
#endif
__is.setstate(__state);
}
return __is;
}
template<class _CharT, class _Traits, class _Allocator>
inline _LIBCPP_INLINE_VISIBILITY
basic_istream<_CharT, _Traits>&
getline(basic_istream<_CharT, _Traits>& __is,
basic_string<_CharT, _Traits, _Allocator>& __str)
{
return getline(__is, __str, __is.widen('\n'));
}
template<class _CharT, class _Traits, class _Allocator>
inline _LIBCPP_INLINE_VISIBILITY
basic_istream<_CharT, _Traits>&
getline(basic_istream<_CharT, _Traits>&& __is,
basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm)
{
return getline(__is, __str, __dlm);
}
template<class _CharT, class _Traits, class _Allocator>
inline _LIBCPP_INLINE_VISIBILITY
basic_istream<_CharT, _Traits>&
getline(basic_istream<_CharT, _Traits>&& __is,
basic_string<_CharT, _Traits, _Allocator>& __str)
{
return getline(__is, __str, __is.widen('\n'));
}
template <class _CharT, class _Traits, size_t _Size>
basic_istream<_CharT, _Traits>&
operator>>(basic_istream<_CharT, _Traits>& __is, bitset<_Size>& __x)
{
ios_base::iostate __state = ios_base::goodbit;
typename basic_istream<_CharT, _Traits>::sentry __sen(__is);
if (__sen)
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif
basic_string<_CharT, _Traits> __str;
const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__is.getloc());
size_t __c = 0;
_CharT __zero = __ct.widen('0');
_CharT __one = __ct.widen('1');
while (__c < _Size)
{
typename _Traits::int_type __i = __is.rdbuf()->sgetc();
if (_Traits::eq_int_type(__i, _Traits::eof()))
{
__state |= ios_base::eofbit;
break;
}
_CharT __ch = _Traits::to_char_type(__i);
if (!_Traits::eq(__ch, __zero) && !_Traits::eq(__ch, __one))
break;
__str.push_back(__ch);
++__c;
__is.rdbuf()->sbumpc();
}
__x = bitset<_Size>(__str);
if (_Size > 0 && __c == 0)
__state |= ios_base::failbit;
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__state |= ios_base::badbit;
__is.__setstate_nothrow(__state);
if (__is.exceptions() & ios_base::badbit)
{
throw;
}
}
#endif
__is.setstate(__state);
}
return __is;
}
_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_istream<char>)
_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_istream<wchar_t>)
_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_iostream<char>)
_LIBCPP_END_NAMESPACE_STD
_LIBCPP_POP_MACROS
#endif // _LIBCPP_ISTREAM
Reference in New Issue View Git Blame Copy Permalink