include/streambuf - third_party/libcxx - Git at Google

 // -*- C++ -*-
 //===------------------------- streambuf ----------------------------------===//
 //
 // 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_STEAMBUF
 #define _LIBCPP_STEAMBUF

 /*
     streambuf synopsis

 namespace std
 {

 template <class charT, class traits = char_traits<charT> >
 class basic_streambuf
 {
 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;

     virtual ~basic_streambuf();

     // 27.6.2.2.1 locales:
     locale pubimbue(const locale& loc);
     locale getloc() const;

     // 27.6.2.2.2 buffer and positioning:
     basic_streambuf* pubsetbuf(char_type* s, streamsize n);
     pos_type pubseekoff(off_type off, ios_base::seekdir way,
                         ios_base::openmode which = ios_base::in | ios_base::out);
     pos_type pubseekpos(pos_type sp,
                         ios_base::openmode which = ios_base::in | ios_base::out);
     int pubsync();

     // Get and put areas:
     // 27.6.2.2.3 Get area:
     streamsize in_avail();
     int_type snextc();
     int_type sbumpc();
     int_type sgetc();
     streamsize sgetn(char_type* s, streamsize n);

     // 27.6.2.2.4 Putback:
     int_type sputbackc(char_type c);
     int_type sungetc();

     // 27.6.2.2.5 Put area:
     int_type sputc(char_type c);
     streamsize sputn(const char_type* s, streamsize n);

 protected:
     basic_streambuf();
     basic_streambuf(const basic_streambuf& rhs);
     basic_streambuf& operator=(const basic_streambuf& rhs);
     void swap(basic_streambuf& rhs);

     // 27.6.2.3.2 Get area:
     char_type* eback() const;
     char_type* gptr() const;
     char_type* egptr() const;
     void gbump(int n);
     void setg(char_type* gbeg, char_type* gnext, char_type* gend);

     // 27.6.2.3.3 Put area:
     char_type* pbase() const;
     char_type* pptr() const;
     char_type* epptr() const;
     void pbump(int n);
     void setp(char_type* pbeg, char_type* pend);

     // 27.6.2.4 virtual functions:
     // 27.6.2.4.1 Locales:
     virtual void imbue(const locale& loc);

     // 27.6.2.4.2 Buffer management and positioning:
     virtual basic_streambuf* setbuf(char_type* s, streamsize n);
     virtual pos_type seekoff(off_type off, ios_base::seekdir way,
                              ios_base::openmode which = ios_base::in | ios_base::out);
     virtual pos_type seekpos(pos_type sp,
                              ios_base::openmode which = ios_base::in | ios_base::out);
     virtual int sync();

     // 27.6.2.4.3 Get area:
     virtual streamsize showmanyc();
     virtual streamsize xsgetn(char_type* s, streamsize n);
     virtual int_type underflow();
     virtual int_type uflow();

     // 27.6.2.4.4 Putback:
     virtual int_type pbackfail(int_type c = traits_type::eof());

     // 27.6.2.4.5 Put area:
     virtual streamsize xsputn(const char_type* s, streamsize n);
     virtual int_type overflow (int_type c = traits_type::eof());
 };

 }  // std

 */

 #include <__config>
 #include <iosfwd>
 #include <ios>

 #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_streambuf
 {
 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;

     static_assert((is_same<_CharT, typename traits_type::char_type>::value),
                   "traits_type::char_type must be the same type as CharT");

     virtual ~basic_streambuf();

     // 27.6.2.2.1 locales:
     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     locale pubimbue(const locale& __loc) {
         imbue(__loc);
         locale __r = __loc_;
         __loc_ = __loc;
         return __r;
     }

     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     locale getloc() const { return __loc_; }

     // 27.6.2.2.2 buffer and positioning:
     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     basic_streambuf* pubsetbuf(char_type* __s, streamsize __n)
     { return setbuf(__s, __n); }

     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     pos_type pubseekoff(off_type __off, ios_base::seekdir __way,
                         ios_base::openmode __which = ios_base::in | ios_base::out)
     { return seekoff(__off, __way, __which); }

     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     pos_type pubseekpos(pos_type __sp,
                         ios_base::openmode __which = ios_base::in | ios_base::out)
     { return seekpos(__sp, __which); }

     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     int pubsync() { return sync(); }

     // Get and put areas:
     // 27.6.2.2.3 Get area:
     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     streamsize in_avail() {
         if (__ninp_ < __einp_)
             return static_cast<streamsize>(__einp_ - __ninp_);
         return showmanyc();
     }

     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     int_type snextc() {
         if (sbumpc() == traits_type::eof())
             return traits_type::eof();
         return sgetc();
     }

     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     int_type sbumpc() {
         if (__ninp_ == __einp_)
             return uflow();
         return traits_type::to_int_type(*__ninp_++);
     }

     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     int_type sgetc() {
         if (__ninp_ == __einp_)
             return underflow();
         return traits_type::to_int_type(*__ninp_);
     }

     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     streamsize sgetn(char_type* __s, streamsize __n)
     { return xsgetn(__s, __n); }

     // 27.6.2.2.4 Putback:
     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     int_type sputbackc(char_type __c) {
         if (__binp_ == __ninp_ || !traits_type::eq(__c, __ninp_[-1]))
             return pbackfail(traits_type::to_int_type(__c));
         return traits_type::to_int_type(*--__ninp_);
     }

     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     int_type sungetc() {
         if (__binp_ == __ninp_)
           return pbackfail();
         return traits_type::to_int_type(*--__ninp_);
     }

     // 27.6.2.2.5 Put area:
     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     int_type sputc(char_type __c) {
         if (__nout_ == __eout_)
             return overflow(traits_type::to_int_type(__c));
         *__nout_++ = __c;
         return traits_type::to_int_type(__c);
     }

     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     streamsize sputn(const char_type* __s, streamsize __n)
     { return xsputn(__s, __n); }

 protected:
     basic_streambuf();
     basic_streambuf(const basic_streambuf& __rhs);
     basic_streambuf& operator=(const basic_streambuf& __rhs);
     void swap(basic_streambuf& __rhs);

     // 27.6.2.3.2 Get area:
     _LIBCPP_INLINE_VISIBILITY char_type* eback() const {return __binp_;}
     _LIBCPP_INLINE_VISIBILITY char_type* gptr()  const {return __ninp_;}
     _LIBCPP_INLINE_VISIBILITY char_type* egptr() const {return __einp_;}

     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     void gbump(int __n) { __ninp_ += __n; }

     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     void setg(char_type* __gbeg, char_type* __gnext, char_type* __gend) {
         __binp_ = __gbeg;
         __ninp_ = __gnext;
         __einp_ = __gend;
     }

     // 27.6.2.3.3 Put area:
     _LIBCPP_INLINE_VISIBILITY char_type* pbase() const {return __bout_;}
     _LIBCPP_INLINE_VISIBILITY char_type* pptr()  const {return __nout_;}
     _LIBCPP_INLINE_VISIBILITY char_type* epptr() const {return __eout_;}

     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     void pbump(int __n) { __nout_ += __n; }

     _LIBCPP_INLINE_VISIBILITY
     void __pbump(streamsize __n) { __nout_ += __n; }

     inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
     void setp(char_type* __pbeg, char_type* __pend) {
         __bout_ = __nout_ = __pbeg;
         __eout_ = __pend;
     }

     // 27.6.2.4 virtual functions:
     // 27.6.2.4.1 Locales:
     virtual void imbue(const locale& __loc);

     // 27.6.2.4.2 Buffer management and positioning:
     virtual basic_streambuf* setbuf(char_type* __s, streamsize __n);
     virtual pos_type seekoff(off_type __off, ios_base::seekdir __way,
                              ios_base::openmode __which = ios_base::in | ios_base::out);
     virtual pos_type seekpos(pos_type __sp,
                              ios_base::openmode __which = ios_base::in | ios_base::out);
     virtual int sync();

     // 27.6.2.4.3 Get area:
     virtual streamsize showmanyc();
     virtual streamsize xsgetn(char_type* __s, streamsize __n);
     virtual int_type underflow();
     virtual int_type uflow();

     // 27.6.2.4.4 Putback:
     virtual int_type pbackfail(int_type __c = traits_type::eof());

     // 27.6.2.4.5 Put area:
     virtual streamsize xsputn(const char_type* __s, streamsize __n);
     virtual int_type overflow(int_type __c = traits_type::eof());

 private:
     locale __loc_;
     char_type* __binp_;
     char_type* __ninp_;
     char_type* __einp_;
     char_type* __bout_;
     char_type* __nout_;
     char_type* __eout_;
 };

 template <class _CharT, class _Traits>
 basic_streambuf<_CharT, _Traits>::~basic_streambuf()
 {
 }

 template <class _CharT, class _Traits>
 basic_streambuf<_CharT, _Traits>::basic_streambuf()
     : __binp_(0),
       __ninp_(0),
       __einp_(0),
       __bout_(0),
       __nout_(0),
       __eout_(0)
 {
 }

 template <class _CharT, class _Traits>
 basic_streambuf<_CharT, _Traits>::basic_streambuf(const basic_streambuf& __sb)
     : __loc_(__sb.__loc_),
       __binp_(__sb.__binp_),
       __ninp_(__sb.__ninp_),
       __einp_(__sb.__einp_),
       __bout_(__sb.__bout_),
       __nout_(__sb.__nout_),
       __eout_(__sb.__eout_)
 {
 }

 template <class _CharT, class _Traits>
 basic_streambuf<_CharT, _Traits>&
 basic_streambuf<_CharT, _Traits>::operator=(const basic_streambuf& __sb)
 {
     __loc_ = __sb.__loc_;
     __binp_ = __sb.__binp_;
     __ninp_ = __sb.__ninp_;
     __einp_ = __sb.__einp_;
     __bout_ = __sb.__bout_;
     __nout_ = __sb.__nout_;
     __eout_ = __sb.__eout_;
     return *this;
 }

 template <class _CharT, class _Traits>
 void
 basic_streambuf<_CharT, _Traits>::swap(basic_streambuf& __sb)
 {
     _VSTD::swap(__loc_, __sb.__loc_);
     _VSTD::swap(__binp_, __sb.__binp_);
     _VSTD::swap(__ninp_, __sb.__ninp_);
     _VSTD::swap(__einp_, __sb.__einp_);
     _VSTD::swap(__bout_, __sb.__bout_);
     _VSTD::swap(__nout_, __sb.__nout_);
     _VSTD::swap(__eout_, __sb.__eout_);
 }

 template <class _CharT, class _Traits>
 void
 basic_streambuf<_CharT, _Traits>::imbue(const locale&)
 {
 }

 template <class _CharT, class _Traits>
 basic_streambuf<_CharT, _Traits>*
 basic_streambuf<_CharT, _Traits>::setbuf(char_type*, streamsize)
 {
     return this;
 }

 template <class _CharT, class _Traits>
 typename basic_streambuf<_CharT, _Traits>::pos_type
 basic_streambuf<_CharT, _Traits>::seekoff(off_type, ios_base::seekdir,
                                           ios_base::openmode)
 {
     return pos_type(off_type(-1));
 }

 template <class _CharT, class _Traits>
 typename basic_streambuf<_CharT, _Traits>::pos_type
 basic_streambuf<_CharT, _Traits>::seekpos(pos_type, ios_base::openmode)
 {
     return pos_type(off_type(-1));
 }

 template <class _CharT, class _Traits>
 int
 basic_streambuf<_CharT, _Traits>::sync()
 {
     return 0;
 }

 template <class _CharT, class _Traits>
 streamsize
 basic_streambuf<_CharT, _Traits>::showmanyc()
 {
     return 0;
 }

 template <class _CharT, class _Traits>
 streamsize
 basic_streambuf<_CharT, _Traits>::xsgetn(char_type* __s, streamsize __n)
 {
     const int_type __eof = traits_type::eof();
     int_type __c;
     streamsize __i = 0;
     while(__i < __n)
     {
         if (__ninp_ < __einp_)
         {
             const streamsize __len = _VSTD::min(static_cast<streamsize>(INT_MAX),
                                 _VSTD::min(__einp_ - __ninp_, __n - __i));
             traits_type::copy(__s, __ninp_, __len);
             __s +=  __len;
             __i +=  __len;
             this->gbump(__len);
         }
         else if ((__c = uflow()) != __eof)
         {
             *__s = traits_type::to_char_type(__c);
             ++__s;
             ++__i;
         }
         else
             break;
     }
     return __i;
 }

 template <class _CharT, class _Traits>
 typename basic_streambuf<_CharT, _Traits>::int_type
 basic_streambuf<_CharT, _Traits>::underflow()
 {
     return traits_type::eof();
 }

 template <class _CharT, class _Traits>
 typename basic_streambuf<_CharT, _Traits>::int_type
 basic_streambuf<_CharT, _Traits>::uflow()
 {
     if (underflow() == traits_type::eof())
         return traits_type::eof();
     return traits_type::to_int_type(*__ninp_++);
 }

 template <class _CharT, class _Traits>
 typename basic_streambuf<_CharT, _Traits>::int_type
 basic_streambuf<_CharT, _Traits>::pbackfail(int_type)
 {
     return traits_type::eof();
 }

 template <class _CharT, class _Traits>
 streamsize
 basic_streambuf<_CharT, _Traits>::xsputn(const char_type* __s, streamsize __n)
 {
     streamsize __i = 0;
     int_type __eof = traits_type::eof();
     while( __i < __n)
     {
         if (__nout_ >= __eout_)
         {
             if (overflow(traits_type::to_int_type(*__s)) == __eof)
                 break;
             ++__s;
             ++__i;
         }
         else
         {
             streamsize __chunk_size = _VSTD::min(__eout_ - __nout_, __n - __i);
             traits_type::copy(__nout_, __s, __chunk_size);
             __nout_ += __chunk_size;
             __s     += __chunk_size;
             __i     += __chunk_size;
         }
     }
     return __i;
 }

 template <class _CharT, class _Traits>
 typename basic_streambuf<_CharT, _Traits>::int_type
 basic_streambuf<_CharT, _Traits>::overflow(int_type)
 {
     return traits_type::eof();
 }

 #ifndef _LIBCPP_DO_NOT_ASSUME_STREAMS_EXPLICIT_INSTANTIATION_IN_DYLIB
 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_streambuf<char>)
 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_streambuf<wchar_t>)

 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ios<char>)
 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ios<wchar_t>)
 #endif

 _LIBCPP_END_NAMESPACE_STD

 _LIBCPP_POP_MACROS

 #endif  // _LIBCPP_STEAMBUF
	// -- C++ --
	//===------------------------- streambuf ----------------------------------===//
	//
	// 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_STEAMBUF
	#define _LIBCPP_STEAMBUF

	/*
	streambuf synopsis

	namespace std
	{

	template <class charT, class traits = char_traits<charT> >
	class basic_streambuf
	{
	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;

	virtual ~basic_streambuf();

	// 27.6.2.2.1 locales:
	locale pubimbue(const locale& loc);
	locale getloc() const;

	// 27.6.2.2.2 buffer and positioning:
	basic_streambuf* pubsetbuf(char_type* s, streamsize n);
	pos_type pubseekoff(off_type off, ios_base::seekdir way,
	ios_base::openmode which = ios_base::in \| ios_base::out);
	pos_type pubseekpos(pos_type sp,
	ios_base::openmode which = ios_base::in \| ios_base::out);
	int pubsync();

	// Get and put areas:
	// 27.6.2.2.3 Get area:
	streamsize in_avail();
	int_type snextc();
	int_type sbumpc();
	int_type sgetc();
	streamsize sgetn(char_type* s, streamsize n);

	// 27.6.2.2.4 Putback:
	int_type sputbackc(char_type c);
	int_type sungetc();

	// 27.6.2.2.5 Put area:
	int_type sputc(char_type c);
	streamsize sputn(const char_type* s, streamsize n);

	protected:
	basic_streambuf();
	basic_streambuf(const basic_streambuf& rhs);
	basic_streambuf& operator=(const basic_streambuf& rhs);
	void swap(basic_streambuf& rhs);

	// 27.6.2.3.2 Get area:
	char_type* eback() const;
	char_type* gptr() const;
	char_type* egptr() const;
	void gbump(int n);
	void setg(char_type* gbeg, char_type* gnext, char_type* gend);

	// 27.6.2.3.3 Put area:
	char_type* pbase() const;
	char_type* pptr() const;
	char_type* epptr() const;
	void pbump(int n);
	void setp(char_type* pbeg, char_type* pend);

	// 27.6.2.4 virtual functions:
	// 27.6.2.4.1 Locales:
	virtual void imbue(const locale& loc);

	// 27.6.2.4.2 Buffer management and positioning:
	virtual basic_streambuf* setbuf(char_type* s, streamsize n);
	virtual pos_type seekoff(off_type off, ios_base::seekdir way,
	ios_base::openmode which = ios_base::in \| ios_base::out);
	virtual pos_type seekpos(pos_type sp,
	ios_base::openmode which = ios_base::in \| ios_base::out);
	virtual int sync();

	// 27.6.2.4.3 Get area:
	virtual streamsize showmanyc();
	virtual streamsize xsgetn(char_type* s, streamsize n);
	virtual int_type underflow();
	virtual int_type uflow();

	// 27.6.2.4.4 Putback:
	virtual int_type pbackfail(int_type c = traits_type::eof());

	// 27.6.2.4.5 Put area:
	virtual streamsize xsputn(const char_type* s, streamsize n);
	virtual int_type overflow (int_type c = traits_type::eof());
	};

	} // std

	*/

	#include <__config>
	#include <iosfwd>
	#include <ios>

	#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_streambuf
	{
	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;

	static_assert((is_same<_CharT, typename traits_type::char_type>::value),
	"traits_type::char_type must be the same type as CharT");

	virtual ~basic_streambuf();

	// 27.6.2.2.1 locales:
	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	locale pubimbue(const locale& __loc) {
	imbue(__loc);
	locale __r = __loc_;
	__loc_ = __loc;
	return __r;
	}

	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	locale getloc() const { return __loc_; }

	// 27.6.2.2.2 buffer and positioning:
	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	basic_streambuf* pubsetbuf(char_type* __s, streamsize __n)
	{ return setbuf(__s, __n); }

	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	pos_type pubseekoff(off_type __off, ios_base::seekdir __way,
	ios_base::openmode __which = ios_base::in \| ios_base::out)
	{ return seekoff(__off, __way, __which); }

	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	pos_type pubseekpos(pos_type __sp,
	ios_base::openmode __which = ios_base::in \| ios_base::out)
	{ return seekpos(__sp, __which); }

	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	int pubsync() { return sync(); }

	// Get and put areas:
	// 27.6.2.2.3 Get area:
	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	streamsize in_avail() {
	if (__ninp_ < __einp_)
	return static_cast<streamsize>(__einp_ - __ninp_);
	return showmanyc();
	}

	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	int_type snextc() {
	if (sbumpc() == traits_type::eof())
	return traits_type::eof();
	return sgetc();
	}

	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	int_type sbumpc() {
	if (__ninp_ == __einp_)
	return uflow();
	return traits_type::to_int_type(*__ninp_++);
	}

	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	int_type sgetc() {
	if (__ninp_ == __einp_)
	return underflow();
	return traits_type::to_int_type(*__ninp_);
	}

	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	streamsize sgetn(char_type* __s, streamsize __n)
	{ return xsgetn(__s, __n); }

	// 27.6.2.2.4 Putback:
	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	int_type sputbackc(char_type __c) {
	if (__binp_ == __ninp_ \|\| !traits_type::eq(__c, __ninp_[-1]))
	return pbackfail(traits_type::to_int_type(__c));
	return traits_type::to_int_type(*--__ninp_);
	}

	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	int_type sungetc() {
	if (__binp_ == __ninp_)
	return pbackfail();
	return traits_type::to_int_type(*--__ninp_);
	}

	// 27.6.2.2.5 Put area:
	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	int_type sputc(char_type __c) {
	if (__nout_ == __eout_)
	return overflow(traits_type::to_int_type(__c));
	*__nout_++ = __c;
	return traits_type::to_int_type(__c);
	}

	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	streamsize sputn(const char_type* __s, streamsize __n)
	{ return xsputn(__s, __n); }

	protected:
	basic_streambuf();
	basic_streambuf(const basic_streambuf& __rhs);
	basic_streambuf& operator=(const basic_streambuf& __rhs);
	void swap(basic_streambuf& __rhs);

	// 27.6.2.3.2 Get area:
	_LIBCPP_INLINE_VISIBILITY char_type* eback() const {return __binp_;}
	_LIBCPP_INLINE_VISIBILITY char_type* gptr() const {return __ninp_;}
	_LIBCPP_INLINE_VISIBILITY char_type* egptr() const {return __einp_;}

	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	void gbump(int __n) { __ninp_ += __n; }

	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	void setg(char_type* __gbeg, char_type* __gnext, char_type* __gend) {
	__binp_ = __gbeg;
	__ninp_ = __gnext;
	__einp_ = __gend;
	}

	// 27.6.2.3.3 Put area:
	_LIBCPP_INLINE_VISIBILITY char_type* pbase() const {return __bout_;}
	_LIBCPP_INLINE_VISIBILITY char_type* pptr() const {return __nout_;}
	_LIBCPP_INLINE_VISIBILITY char_type* epptr() const {return __eout_;}

	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	void pbump(int __n) { __nout_ += __n; }

	_LIBCPP_INLINE_VISIBILITY
	void __pbump(streamsize __n) { __nout_ += __n; }

	inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1
	void setp(char_type* __pbeg, char_type* __pend) {
	__bout_ = __nout_ = __pbeg;
	__eout_ = __pend;
	}

	// 27.6.2.4 virtual functions:
	// 27.6.2.4.1 Locales:
	virtual void imbue(const locale& __loc);

	// 27.6.2.4.2 Buffer management and positioning:
	virtual basic_streambuf* setbuf(char_type* __s, streamsize __n);
	virtual pos_type seekoff(off_type __off, ios_base::seekdir __way,
	ios_base::openmode __which = ios_base::in \| ios_base::out);
	virtual pos_type seekpos(pos_type __sp,
	ios_base::openmode __which = ios_base::in \| ios_base::out);
	virtual int sync();

	// 27.6.2.4.3 Get area:
	virtual streamsize showmanyc();
	virtual streamsize xsgetn(char_type* __s, streamsize __n);
	virtual int_type underflow();
	virtual int_type uflow();

	// 27.6.2.4.4 Putback:
	virtual int_type pbackfail(int_type __c = traits_type::eof());

	// 27.6.2.4.5 Put area:
	virtual streamsize xsputn(const char_type* __s, streamsize __n);
	virtual int_type overflow(int_type __c = traits_type::eof());

	private:
	locale __loc_;
	char_type* __binp_;
	char_type* __ninp_;
	char_type* __einp_;
	char_type* __bout_;
	char_type* __nout_;
	char_type* __eout_;
	};

	template <class _CharT, class _Traits>
	basic_streambuf<_CharT, _Traits>::~basic_streambuf()
	{
	}

	template <class _CharT, class _Traits>
	basic_streambuf<_CharT, _Traits>::basic_streambuf()
	: __binp_(0),
	__ninp_(0),
	__einp_(0),
	__bout_(0),
	__nout_(0),
	__eout_(0)
	{
	}

	template <class _CharT, class _Traits>
	basic_streambuf<_CharT, _Traits>::basic_streambuf(const basic_streambuf& __sb)
	: __loc_(__sb.__loc_),
	__binp_(__sb.__binp_),
	__ninp_(__sb.__ninp_),
	__einp_(__sb.__einp_),
	__bout_(__sb.__bout_),
	__nout_(__sb.__nout_),
	__eout_(__sb.__eout_)
	{
	}

	template <class _CharT, class _Traits>
	basic_streambuf<_CharT, _Traits>&
	basic_streambuf<_CharT, _Traits>::operator=(const basic_streambuf& __sb)
	{
	__loc_ = __sb.__loc_;
	__binp_ = __sb.__binp_;
	__ninp_ = __sb.__ninp_;
	__einp_ = __sb.__einp_;
	__bout_ = __sb.__bout_;
	__nout_ = __sb.__nout_;
	__eout_ = __sb.__eout_;
	return *this;
	}

	template <class _CharT, class _Traits>
	void
	basic_streambuf<_CharT, _Traits>::swap(basic_streambuf& __sb)
	{
	_VSTD::swap(__loc_, __sb.__loc_);
	_VSTD::swap(__binp_, __sb.__binp_);
	_VSTD::swap(__ninp_, __sb.__ninp_);
	_VSTD::swap(__einp_, __sb.__einp_);
	_VSTD::swap(__bout_, __sb.__bout_);
	_VSTD::swap(__nout_, __sb.__nout_);
	_VSTD::swap(__eout_, __sb.__eout_);
	}

	template <class _CharT, class _Traits>
	void
	basic_streambuf<_CharT, _Traits>::imbue(const locale&)
	{
	}

	template <class _CharT, class _Traits>
	basic_streambuf<_CharT, _Traits>*
	basic_streambuf<_CharT, _Traits>::setbuf(char_type*, streamsize)
	{
	return this;
	}

	template <class _CharT, class _Traits>
	typename basic_streambuf<_CharT, _Traits>::pos_type
	basic_streambuf<_CharT, _Traits>::seekoff(off_type, ios_base::seekdir,
	ios_base::openmode)
	{
	return pos_type(off_type(-1));
	}

	template <class _CharT, class _Traits>
	typename basic_streambuf<_CharT, _Traits>::pos_type
	basic_streambuf<_CharT, _Traits>::seekpos(pos_type, ios_base::openmode)
	{
	return pos_type(off_type(-1));
	}

	template <class _CharT, class _Traits>
	int
	basic_streambuf<_CharT, _Traits>::sync()
	{
	return 0;
	}

	template <class _CharT, class _Traits>
	streamsize
	basic_streambuf<_CharT, _Traits>::showmanyc()
	{
	return 0;
	}

	template <class _CharT, class _Traits>
	streamsize
	basic_streambuf<_CharT, _Traits>::xsgetn(char_type* __s, streamsize __n)
	{
	const int_type __eof = traits_type::eof();
	int_type __c;
	streamsize __i = 0;
	while(__i < __n)
	{
	if (__ninp_ < __einp_)
	{
	const streamsize __len = _VSTD::min(static_cast<streamsize>(INT_MAX),
	_VSTD::min(__einp_ - __ninp_, __n - __i));
	traits_type::copy(__s, __ninp_, __len);
	__s += __len;
	__i += __len;
	this->gbump(__len);
	}
	else if ((__c = uflow()) != __eof)
	{
	*__s = traits_type::to_char_type(__c);
	++__s;
	++__i;
	}
	else
	break;
	}
	return __i;
	}

	template <class _CharT, class _Traits>
	typename basic_streambuf<_CharT, _Traits>::int_type
	basic_streambuf<_CharT, _Traits>::underflow()
	{
	return traits_type::eof();
	}

	template <class _CharT, class _Traits>
	typename basic_streambuf<_CharT, _Traits>::int_type
	basic_streambuf<_CharT, _Traits>::uflow()
	{
	if (underflow() == traits_type::eof())
	return traits_type::eof();
	return traits_type::to_int_type(*__ninp_++);
	}

	template <class _CharT, class _Traits>
	typename basic_streambuf<_CharT, _Traits>::int_type
	basic_streambuf<_CharT, _Traits>::pbackfail(int_type)
	{
	return traits_type::eof();
	}

	template <class _CharT, class _Traits>
	streamsize
	basic_streambuf<_CharT, _Traits>::xsputn(const char_type* __s, streamsize __n)
	{
	streamsize __i = 0;
	int_type __eof = traits_type::eof();
	while( __i < __n)
	{
	if (__nout_ >= __eout_)
	{
	if (overflow(traits_type::to_int_type(*__s)) == __eof)
	break;
	++__s;
	++__i;
	}
	else
	{
	streamsize __chunk_size = _VSTD::min(__eout_ - __nout_, __n - __i);
	traits_type::copy(__nout_, __s, __chunk_size);
	__nout_ += __chunk_size;
	__s += __chunk_size;
	__i += __chunk_size;
	}
	}
	return __i;
	}

	template <class _CharT, class _Traits>
	typename basic_streambuf<_CharT, _Traits>::int_type
	basic_streambuf<_CharT, _Traits>::overflow(int_type)
	{
	return traits_type::eof();
	}

	#ifndef _LIBCPP_DO_NOT_ASSUME_STREAMS_EXPLICIT_INSTANTIATION_IN_DYLIB
	_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_streambuf<char>)
	_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_streambuf<wchar_t>)

	_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ios<char>)
	_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ios<wchar_t>)
	#endif

	_LIBCPP_END_NAMESPACE_STD

	_LIBCPP_POP_MACROS

	#endif // _LIBCPP_STEAMBUF