[thirdparty/gcc.git] / libstdc++-v3 / include / bits / streambuf_iterator.h

// Streambuf iterators

// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
// 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 2, 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.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

/** @file streambuf_iterator.h
 *  This is an internal header file, included by other library headers.
 *  You should not attempt to use it directly.
 */

#ifndef _STREAMBUF_ITERATOR_H
#define _STREAMBUF_ITERATOR_H 1

#pragma GCC system_header

#include <streambuf>
#include <debug/debug.h>

_GLIBCXX_BEGIN_NAMESPACE(std)
     
  // 24.5.3 Template class istreambuf_iterator
  /// Provides input iterator semantics for streambufs.
  template<typename _CharT, typename _Traits>
    class istreambuf_iterator
    : public iterator<input_iterator_tag, _CharT, typename _Traits::off_type,
		      _CharT*, _CharT&>
    {
    public:
      // Types:
      //@{
      /// Public typedefs
      typedef _CharT					char_type;
      typedef _Traits					traits_type;
      typedef typename _Traits::int_type		int_type;
      typedef basic_streambuf<_CharT, _Traits>		streambuf_type;
      typedef basic_istream<_CharT, _Traits>		istream_type;
      //@}

      template<typename _CharT2>
	friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
		                    ostreambuf_iterator<_CharT2> >::__type
	copy(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
	     ostreambuf_iterator<_CharT2>);

      template<typename _CharT2>
	friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value, 
					       _CharT2*>::__type
	__copy_aux(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
		   _CharT2*);

      template<typename _CharT2>
	friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
			            istreambuf_iterator<_CharT2> >::__type
	find(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
	     const _CharT2&);

    private:
      // 24.5.3 istreambuf_iterator
      // p 1
      // If the end of stream is reached (streambuf_type::sgetc()
      // returns traits_type::eof()), the iterator becomes equal to
      // the "end of stream" iterator value.
      // NB: This implementation assumes the "end of stream" value
      // is EOF, or -1.
      mutable streambuf_type*	_M_sbuf;
      mutable int_type		_M_c;

    public:
      ///  Construct end of input stream iterator.
      istreambuf_iterator() throw()
      : _M_sbuf(0), _M_c(traits_type::eof()) { }

      ///  Construct start of input stream iterator.
      istreambuf_iterator(istream_type& __s) throw()
      : _M_sbuf(__s.rdbuf()), _M_c(traits_type::eof()) { }

      ///  Construct start of streambuf iterator.
      istreambuf_iterator(streambuf_type* __s) throw()
      : _M_sbuf(__s), _M_c(traits_type::eof()) { }

      ///  Return the current character pointed to by iterator.  This returns
      ///  streambuf.sgetc().  It cannot be assigned.  NB: The result of
      ///  operator*() on an end of stream is undefined.
      char_type
      operator*() const
      {
#ifdef _GLIBCXX_DEBUG_PEDANTIC
	// Dereferencing a past-the-end istreambuf_iterator is a
	// libstdc++ extension
	__glibcxx_requires_cond(!_M_at_eof(),
				_M_message(__gnu_debug::__msg_deref_istreambuf)
				._M_iterator(*this));
#endif
	return traits_type::to_char_type(_M_get());
      }

      /// Advance the iterator.  Calls streambuf.sbumpc().
      istreambuf_iterator&
      operator++()
      {
	__glibcxx_requires_cond(!_M_at_eof(),
				_M_message(__gnu_debug::__msg_inc_istreambuf)
				._M_iterator(*this));
	if (_M_sbuf)
	  {
	    _M_sbuf->sbumpc();
	    _M_c = traits_type::eof();
	  }
	return *this;
      }

      /// Advance the iterator.  Calls streambuf.sbumpc().
      istreambuf_iterator
      operator++(int)
      {
	__glibcxx_requires_cond(!_M_at_eof(),
				_M_message(__gnu_debug::__msg_inc_istreambuf)
				._M_iterator(*this));

	istreambuf_iterator __old = *this;
	if (_M_sbuf)
	  {
	    __old._M_c = _M_sbuf->sbumpc();
	    _M_c = traits_type::eof();
	  }
	return __old;
      }

      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 110 istreambuf_iterator::equal not const
      // NB: there is also number 111 (NAD, Future) pending on this function.
      /// Return true both iterators are end or both are not end.
      bool
      equal(const istreambuf_iterator& __b) const
      { return _M_at_eof() == __b._M_at_eof(); }

    private:
      int_type
      _M_get() const
      {
	const int_type __eof = traits_type::eof();
	int_type __ret = __eof;
	if (_M_sbuf)
	  {
	    if (!traits_type::eq_int_type(_M_c, __eof))
	      __ret = _M_c;
	    else if (!traits_type::eq_int_type((__ret = _M_sbuf->sgetc()),
					       __eof))
	      _M_c = __ret;
	    else
	      _M_sbuf = 0;
	  }
	return __ret;
      }

      bool
      _M_at_eof() const
      {
	const int_type __eof = traits_type::eof();
	return traits_type::eq_int_type(_M_get(), __eof);
      }
    };

  template<typename _CharT, typename _Traits>
    inline bool
    operator==(const istreambuf_iterator<_CharT, _Traits>& __a,
	       const istreambuf_iterator<_CharT, _Traits>& __b)
    { return __a.equal(__b); }

  template<typename _CharT, typename _Traits>
    inline bool
    operator!=(const istreambuf_iterator<_CharT, _Traits>& __a,
	       const istreambuf_iterator<_CharT, _Traits>& __b)
    { return !__a.equal(__b); }

  /// Provides output iterator semantics for streambufs.
  template<typename _CharT, typename _Traits>
    class ostreambuf_iterator
    : public iterator<output_iterator_tag, void, void, void, void>
    {
    public:
      // Types:
      //@{
      /// Public typedefs
      typedef _CharT                           char_type;
      typedef _Traits                          traits_type;
      typedef basic_streambuf<_CharT, _Traits> streambuf_type;
      typedef basic_ostream<_CharT, _Traits>   ostream_type;
      //@}

      template<typename _CharT2>
	friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
		                    ostreambuf_iterator<_CharT2> >::__type
	copy(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
	     ostreambuf_iterator<_CharT2>);

    private:
      streambuf_type*	_M_sbuf;
      bool		_M_failed;

    public:
      ///  Construct output iterator from ostream.
      ostreambuf_iterator(ostream_type& __s) throw ()
      : _M_sbuf(__s.rdbuf()), _M_failed(!_M_sbuf) { }

      ///  Construct output iterator from streambuf.
      ostreambuf_iterator(streambuf_type* __s) throw ()
      : _M_sbuf(__s), _M_failed(!_M_sbuf) { }

      ///  Write character to streambuf.  Calls streambuf.sputc().
      ostreambuf_iterator&
      operator=(_CharT __c)
      {
	if (!_M_failed &&
	    _Traits::eq_int_type(_M_sbuf->sputc(__c), _Traits::eof()))
	  _M_failed = true;
	return *this;
      }

      /// Return *this.
      ostreambuf_iterator&
      operator*()
      { return *this; }

      /// Return *this.
      ostreambuf_iterator&
      operator++(int)
      { return *this; }

      /// Return *this.
      ostreambuf_iterator&
      operator++()
      { return *this; }

      /// Return true if previous operator=() failed.
      bool
      failed() const throw()
      { return _M_failed; }

      ostreambuf_iterator&
      _M_put(const _CharT* __ws, streamsize __len)
      {
	if (__builtin_expect(!_M_failed, true)
	    && __builtin_expect(this->_M_sbuf->sputn(__ws, __len) != __len,
				false))
	  _M_failed = true;
	return *this;
      }
    };

  // Overloads for streambuf iterators.
  template<typename _CharT>
    typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
    	                 	    ostreambuf_iterator<_CharT> >::__type
    copy(istreambuf_iterator<_CharT> __first,
	 istreambuf_iterator<_CharT> __last,
	 ostreambuf_iterator<_CharT> __result)
    {
      if (__first._M_sbuf && !__last._M_sbuf && !__result._M_failed)
	{
	  bool __ineof;
	  __copy_streambufs_eof(__first._M_sbuf, __result._M_sbuf, __ineof);
	  if (!__ineof)
	    __result._M_failed = true;
	}
      return __result;
    }

  template<typename _CharT>
    typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value, 
    				    ostreambuf_iterator<_CharT> >::__type
    __copy_aux(_CharT* __first, _CharT* __last,
	       ostreambuf_iterator<_CharT> __result)
    {
      const streamsize __num = __last - __first;
      if (__num > 0)
	__result._M_put(__first, __num);
      return __result;
    }

  template<typename _CharT>
    typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
				    ostreambuf_iterator<_CharT> >::__type
    __copy_aux(const _CharT* __first, const _CharT* __last,
	       ostreambuf_iterator<_CharT> __result)
    {
      const streamsize __num = __last - __first;
      if (__num > 0)
	__result._M_put(__first, __num);
      return __result;
    }

  template<typename _CharT>
    typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value, 
    				    _CharT*>::__type
    __copy_aux(istreambuf_iterator<_CharT> __first,
	       istreambuf_iterator<_CharT> __last, _CharT* __result)
    {
      typedef istreambuf_iterator<_CharT>                  __is_iterator_type;
      typedef typename __is_iterator_type::traits_type     traits_type;
      typedef typename __is_iterator_type::streambuf_type  streambuf_type;
      typedef typename traits_type::int_type               int_type;

      if (__first._M_sbuf && !__last._M_sbuf)
	{
	  streambuf_type* __sb = __first._M_sbuf;
	  int_type __c = __sb->sgetc();
	  while (!traits_type::eq_int_type(__c, traits_type::eof()))
	    {
	      const streamsize __n = __sb->egptr() - __sb->gptr();
	      if (__n > 1)
		{
		  traits_type::copy(__result, __sb->gptr(), __n);
		  __sb->gbump(__n);
		  __result += __n;
		  __c = __sb->underflow();
		}
	      else
		{
		  *__result++ = traits_type::to_char_type(__c);
		  __c = __sb->snextc();
		}
	    }
	}
      return __result;
    }

  template<typename _CharT>
    typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
		  		    istreambuf_iterator<_CharT> >::__type
    find(istreambuf_iterator<_CharT> __first,
	 istreambuf_iterator<_CharT> __last, const _CharT& __val)
    {
      typedef istreambuf_iterator<_CharT>                  __is_iterator_type;
      typedef typename __is_iterator_type::traits_type     traits_type;
      typedef typename __is_iterator_type::streambuf_type  streambuf_type;
      typedef typename traits_type::int_type               int_type;

      if (__first._M_sbuf && !__last._M_sbuf)
	{
	  const int_type __ival = traits_type::to_int_type(__val);
	  streambuf_type* __sb = __first._M_sbuf;
	  int_type __c = __sb->sgetc();
	  while (!traits_type::eq_int_type(__c, traits_type::eof())
		 && !traits_type::eq_int_type(__c, __ival))
	    {
	      streamsize __n = __sb->egptr() - __sb->gptr();
	      if (__n > 1)
		{
		  const _CharT* __p = traits_type::find(__sb->gptr(),
							__n, __val);
		  if (__p)
		    __n = __p - __sb->gptr();
		  __sb->gbump(__n);
		  __c = __sb->sgetc();
		}
	      else
		__c = __sb->snextc();
	    }

	  if (!traits_type::eq_int_type(__c, traits_type::eof()))
	    __first._M_c = __c;
	  else
	    __first._M_sbuf = 0;
	}
      return __first;
    }

_GLIBCXX_END_NAMESPACE

#endif
Commit	Line	Data
725dc051 BK	1	// Streambuf iterators
725dc051 BK	2
0002d5d2	3	// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
5c352a47	4	// Free Software Foundation, Inc.
725dc051 BK	5	//
	6	// This file is part of the GNU ISO C++ Library. This library is free
	7	// software; you can redistribute it and/or modify it under the
	8	// terms of the GNU General Public License as published by the
	9	// Free Software Foundation; either version 2, or (at your option)
	10	// any later version.
	11
	12	// This library is distributed in the hope that it will be useful,
	13	// but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	// GNU General Public License for more details.
	16
	17	// You should have received a copy of the GNU General Public License along
	18	// with this library; see the file COPYING. If not, write to the Free
83f51799	19	// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
725dc051 BK	20	// USA.
	21
	22	// As a special exception, you may use this file as part of a free software
	23	// library without restriction. Specifically, if other files instantiate
	24	// templates or use macros or inline functions from this file, or you compile
	25	// this file and link it with other files to produce an executable, this
	26	// file does not by itself cause the resulting executable to be covered by
	27	// the GNU General Public License. This exception does not however
	28	// invalidate any other reasons why the executable file might be covered by
	29	// the GNU General Public License.
	30
729e3d3f PE	31	/** @file streambuf_iterator.h
	32	* This is an internal header file, included by other library headers.
	33	* You should not attempt to use it directly.
	34	*/
	35
3d7c150e BK	36	#ifndef _STREAMBUF_ITERATOR_H
3d7c150e BK	37	#define _STREAMBUF_ITERATOR_H 1
725dc051	38
b0a85b86 GDR	39	#pragma GCC system_header
b0a85b86 GDR	40
2e2a38cd	41	#include <streambuf>
285b36d6	42	#include <debug/debug.h>
2e2a38cd	43
3cbc7af0	44	_GLIBCXX_BEGIN_NAMESPACE(std)
0002d5d2	45
725dc051	46	// 24.5.3 Template class istreambuf_iterator
ffcec5c8	47	/// Provides input iterator semantics for streambufs.
39003c99	48	template<typename _CharT, typename _Traits>
725dc051 BK	49	class istreambuf_iterator
725dc051 BK	50	: public iterator<input_iterator_tag, _CharT, typename _Traits::off_type,
ed6814f7	51	_CharT*, _CharT&>
725dc051 BK	52	{
725dc051 BK	53	public:
725dc051	54	// Types:
ffcec5c8 JQ	55	//@{
ffcec5c8 JQ	56	/// Public typedefs
ed6814f7 BI	57	typedef _CharT char_type;
	58	typedef _Traits traits_type;
	59	typedef typename _Traits::int_type int_type;
	60	typedef basic_streambuf<_CharT, _Traits> streambuf_type;
	61	typedef basic_istream<_CharT, _Traits> istream_type;
ffcec5c8	62	//@}
725dc051	63
0002d5d2	64	template<typename _CharT2>
105c6331 BK	65	friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
105c6331 BK	66	ostreambuf_iterator<_CharT2> >::__type
0002d5d2 PC	67	copy(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
	68	ostreambuf_iterator<_CharT2>);
	69
	70	template<typename _CharT2>
105c6331 BK	71	friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
105c6331 BK	72	_CharT2*>::__type
0002d5d2 PC	73	__copy_aux(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
	74	_CharT2*);
	75
	76	template<typename _CharT2>
105c6331 BK	77	friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
105c6331 BK	78	istreambuf_iterator<_CharT2> >::__type
0002d5d2	79	find(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
976e25f4	80	const _CharT2&);
0002d5d2	81
39003c99	82	private:
ed6814f7 BI	83	// 24.5.3 istreambuf_iterator
ed6814f7 BI	84	// p 1
39003c99 BK	85	// If the end of stream is reached (streambuf_type::sgetc()
	86	// returns traits_type::eof()), the iterator becomes equal to
	87	// the "end of stream" iterator value.
	88	// NB: This implementation assumes the "end of stream" value
	89	// is EOF, or -1.
ed6814f7	90	mutable streambuf_type* _M_sbuf;
15fb0dbe	91	mutable int_type _M_c;
39003c99 BK	92
39003c99 BK	93	public:
ffcec5c8	94	/// Construct end of input stream iterator.
ed6814f7	95	istreambuf_iterator() throw()
f13a69ec	96	: _M_sbuf(0), _M_c(traits_type::eof()) { }
ed6814f7	97
ffcec5c8	98	/// Construct start of input stream iterator.
725dc051	99	istreambuf_iterator(istream_type& __s) throw()
f13a69ec	100	: _M_sbuf(__s.rdbuf()), _M_c(traits_type::eof()) { }
725dc051	101
ffcec5c8	102	/// Construct start of streambuf iterator.
725dc051	103	istreambuf_iterator(streambuf_type* __s) throw()
f13a69ec	104	: _M_sbuf(__s), _M_c(traits_type::eof()) { }
ed6814f7	105
ffcec5c8 JQ	106	/// Return the current character pointed to by iterator. This returns
	107	/// streambuf.sgetc(). It cannot be assigned. NB: The result of
	108	/// operator*() on an end of stream is undefined.
ed6814f7	109	char_type
725dc051	110	operator*() const
ed6814f7	111	{
285b36d6 BK	112	#ifdef _GLIBCXX_DEBUG_PEDANTIC
	113	// Dereferencing a past-the-end istreambuf_iterator is a
	114	// libstdc++ extension
	115	__glibcxx_requires_cond(!_M_at_eof(),
	116	_M_message(__gnu_debug::__msg_deref_istreambuf)
ed6814f7	117	._M_iterator(*this));
285b36d6	118	#endif
ed6814f7	119	return traits_type::to_char_type(_M_get());
285b36d6	120	}
ffcec5c8 JQ	121
ffcec5c8 JQ	122	/// Advance the iterator. Calls streambuf.sbumpc().
ed6814f7	123	istreambuf_iterator&
725dc051	124	operator++()
ed6814f7	125	{
285b36d6 BK	126	__glibcxx_requires_cond(!_M_at_eof(),
285b36d6 BK	127	_M_message(__gnu_debug::__msg_inc_istreambuf)
ed6814f7	128	._M_iterator(*this));
eacf72d3 NM	129	if (_M_sbuf)
	130	{
	131	_M_sbuf->sbumpc();
	132	_M_c = traits_type::eof();
	133	}
ed6814f7	134	return *this;
725dc051 BK	135	}
725dc051 BK	136
ffcec5c8	137	/// Advance the iterator. Calls streambuf.sbumpc().
b581eaf7	138	istreambuf_iterator
725dc051 BK	139	operator++(int)
725dc051 BK	140	{
285b36d6 BK	141	__glibcxx_requires_cond(!_M_at_eof(),
285b36d6 BK	142	_M_message(__gnu_debug::__msg_inc_istreambuf)
ed6814f7	143	._M_iterator(*this));
285b36d6	144
b581eaf7	145	istreambuf_iterator __old = *this;
eacf72d3 NM	146	if (_M_sbuf)
	147	{
	148	__old._M_c = _M_sbuf->sbumpc();
	149	_M_c = traits_type::eof();
	150	}
ed6814f7	151	return __old;
725dc051	152	}
725dc051	153
f5677b15	154	// _GLIBCXX_RESOLVE_LIB_DEFECTS
725dc051	155	// 110 istreambuf_iterator::equal not const
77cd227e	156	// NB: there is also number 111 (NAD, Future) pending on this function.
ffcec5c8	157	/// Return true both iterators are end or both are not end.
ed6814f7	158	bool
b581eaf7	159	equal(const istreambuf_iterator& __b) const
6bfcbf0d	160	{ return _M_at_eof() == __b._M_at_eof(); }
9875ea05 BK	161
9875ea05 BK	162	private:
ed6814f7	163	int_type
9875ea05	164	_M_get() const
ed6814f7	165	{
f13a69ec BK	166	const int_type __eof = traits_type::eof();
f13a69ec BK	167	int_type __ret = __eof;
9875ea05	168	if (_M_sbuf)
ed6814f7	169	{
50922820	170	if (!traits_type::eq_int_type(_M_c, __eof))
9875ea05	171	__ret = _M_c;
50922820 PC	172	else if (!traits_type::eq_int_type((__ret = _M_sbuf->sgetc()),
	173	__eof))
	174	_M_c = __ret;
15fb0dbe	175	else
15d72060	176	_M_sbuf = 0;
9875ea05 BK	177	}
	178	return __ret;
	179	}
285b36d6	180
ed6814f7	181	bool
285b36d6 BK	182	_M_at_eof() const
	183	{
	184	const int_type __eof = traits_type::eof();
	185	return traits_type::eq_int_type(_M_get(), __eof);
	186	}
725dc051 BK	187	};
	188
	189	template<typename _CharT, typename _Traits>
ed6814f7	190	inline bool
725dc051 BK	191	operator==(const istreambuf_iterator<_CharT, _Traits>& __a,
	192	const istreambuf_iterator<_CharT, _Traits>& __b)
	193	{ return __a.equal(__b); }
	194
	195	template<typename _CharT, typename _Traits>
ed6814f7	196	inline bool
725dc051 BK	197	operator!=(const istreambuf_iterator<_CharT, _Traits>& __a,
	198	const istreambuf_iterator<_CharT, _Traits>& __b)
	199	{ return !__a.equal(__b); }
5c352a47	200
ffcec5c8	201	/// Provides output iterator semantics for streambufs.
5c352a47 BK	202	template<typename _CharT, typename _Traits>
	203	class ostreambuf_iterator
	204	: public iterator<output_iterator_tag, void, void, void, void>
	205	{
	206	public:
	207	// Types:
ffcec5c8 JQ	208	//@{
ffcec5c8 JQ	209	/// Public typedefs
5c352a47 BK	210	typedef _CharT char_type;
	211	typedef _Traits traits_type;
	212	typedef basic_streambuf<_CharT, _Traits> streambuf_type;
	213	typedef basic_ostream<_CharT, _Traits> ostream_type;
ffcec5c8	214	//@}
5c352a47	215
0002d5d2	216	template<typename _CharT2>
105c6331 BK	217	friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
105c6331 BK	218	ostreambuf_iterator<_CharT2> >::__type
0002d5d2 PC	219	copy(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
	220	ostreambuf_iterator<_CharT2>);
	221
5c352a47	222	private:
ed6814f7 BI	223	streambuf_type* _M_sbuf;
ed6814f7 BI	224	bool _M_failed;
5c352a47 BK	225
5c352a47 BK	226	public:
ffcec5c8	227	/// Construct output iterator from ostream.
5c352a47 BK	228	ostreambuf_iterator(ostream_type& __s) throw ()
5c352a47 BK	229	: _M_sbuf(__s.rdbuf()), _M_failed(!_M_sbuf) { }
ed6814f7	230
ffcec5c8	231	/// Construct output iterator from streambuf.
5c352a47 BK	232	ostreambuf_iterator(streambuf_type* __s) throw ()
	233	: _M_sbuf(__s), _M_failed(!_M_sbuf) { }
	234
ffcec5c8	235	/// Write character to streambuf. Calls streambuf.sputc().
ed6814f7	236	ostreambuf_iterator&
2e2a38cd BK	237	operator=(_CharT __c)
2e2a38cd BK	238	{
ed6814f7	239	if (!_M_failed &&
2e2a38cd BK	240	_Traits::eq_int_type(_M_sbuf->sputc(__c), _Traits::eof()))
	241	_M_failed = true;
	242	return *this;
	243	}
5c352a47	244
ffcec5c8	245	/// Return *this.
ed6814f7	246	ostreambuf_iterator&
e0ec69c9	247	operator*()
5c352a47 BK	248	{ return *this; }
5c352a47 BK	249
ffcec5c8	250	/// Return *this.
ed6814f7	251	ostreambuf_iterator&
e0ec69c9	252	operator++(int)
5c352a47 BK	253	{ return *this; }
5c352a47 BK	254
ffcec5c8	255	/// Return *this.
ed6814f7	256	ostreambuf_iterator&
e0ec69c9	257	operator++()
5c352a47 BK	258	{ return *this; }
5c352a47 BK	259
ffcec5c8	260	/// Return true if previous operator=() failed.
ed6814f7	261	bool
5c352a47 BK	262	failed() const throw()
5c352a47 BK	263	{ return _M_failed; }
5c352a47	264
ed6814f7	265	ostreambuf_iterator&
2e2a38cd BK	266	_M_put(const _CharT* __ws, streamsize __len)
2e2a38cd BK	267	{
53279c10	268	if (__builtin_expect(!_M_failed, true)
15d72060 PC	269	&& __builtin_expect(this->_M_sbuf->sputn(__ws, __len) != __len,
15d72060 PC	270	false))
53279c10	271	_M_failed = true;
2e2a38cd BK	272	return *this;
	273	}
	274	};
3cbc7af0	275
0002d5d2 PC	276	// Overloads for streambuf iterators.
0002d5d2 PC	277	template<typename _CharT>
105c6331 BK	278	typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
105c6331 BK	279	ostreambuf_iterator<_CharT> >::__type
0002d5d2 PC	280	copy(istreambuf_iterator<_CharT> __first,
	281	istreambuf_iterator<_CharT> __last,
	282	ostreambuf_iterator<_CharT> __result)
	283	{
	284	if (__first._M_sbuf && !__last._M_sbuf && !__result._M_failed)
	285	{
	286	bool __ineof;
	287	__copy_streambufs_eof(__first._M_sbuf, __result._M_sbuf, __ineof);
	288	if (!__ineof)
	289	__result._M_failed = true;
	290	}
	291	return __result;
	292	}
	293
	294	template<typename _CharT>
105c6331 BK	295	typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
105c6331 BK	296	ostreambuf_iterator<_CharT> >::__type
0002d5d2 PC	297	__copy_aux(_CharT* __first, _CharT* __last,
	298	ostreambuf_iterator<_CharT> __result)
	299	{
	300	const streamsize __num = __last - __first;
	301	if (__num > 0)
	302	__result._M_put(__first, __num);
	303	return __result;
	304	}
	305
	306	template<typename _CharT>
105c6331 BK	307	typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
105c6331 BK	308	ostreambuf_iterator<_CharT> >::__type
0002d5d2 PC	309	__copy_aux(const _CharT* __first, const _CharT* __last,
	310	ostreambuf_iterator<_CharT> __result)
	311	{
	312	const streamsize __num = __last - __first;
	313	if (__num > 0)
	314	__result._M_put(__first, __num);
	315	return __result;
	316	}
	317
	318	template<typename _CharT>
105c6331 BK	319	typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
105c6331 BK	320	_CharT*>::__type
0002d5d2 PC	321	__copy_aux(istreambuf_iterator<_CharT> __first,
	322	istreambuf_iterator<_CharT> __last, _CharT* __result)
	323	{
	324	typedef istreambuf_iterator<_CharT> __is_iterator_type;
	325	typedef typename __is_iterator_type::traits_type traits_type;
	326	typedef typename __is_iterator_type::streambuf_type streambuf_type;
	327	typedef typename traits_type::int_type int_type;
	328
	329	if (__first._M_sbuf && !__last._M_sbuf)
	330	{
	331	streambuf_type* __sb = __first._M_sbuf;
	332	int_type __c = __sb->sgetc();
	333	while (!traits_type::eq_int_type(__c, traits_type::eof()))
	334	{
	335	const streamsize __n = __sb->egptr() - __sb->gptr();
	336	if (__n > 1)
	337	{
	338	traits_type::copy(__result, __sb->gptr(), __n);
	339	__sb->gbump(__n);
	340	__result += __n;
	341	__c = __sb->underflow();
	342	}
	343	else
	344	{
	345	*__result++ = traits_type::to_char_type(__c);
	346	__c = __sb->snextc();
	347	}
	348	}
	349	}
	350	return __result;
	351	}
	352
	353	template<typename _CharT>
105c6331 BK	354	typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
105c6331 BK	355	istreambuf_iterator<_CharT> >::__type
0002d5d2	356	find(istreambuf_iterator<_CharT> __first,
976e25f4	357	istreambuf_iterator<_CharT> __last, const _CharT& __val)
0002d5d2 PC	358	{
	359	typedef istreambuf_iterator<_CharT> __is_iterator_type;
	360	typedef typename __is_iterator_type::traits_type traits_type;
	361	typedef typename __is_iterator_type::streambuf_type streambuf_type;
	362	typedef typename traits_type::int_type int_type;
	363
	364	if (__first._M_sbuf && !__last._M_sbuf)
	365	{
	366	const int_type __ival = traits_type::to_int_type(__val);
	367	streambuf_type* __sb = __first._M_sbuf;
	368	int_type __c = __sb->sgetc();
	369	while (!traits_type::eq_int_type(__c, traits_type::eof())
	370	&& !traits_type::eq_int_type(__c, __ival))
	371	{
	372	streamsize __n = __sb->egptr() - __sb->gptr();
	373	if (__n > 1)
	374	{
	375	const _CharT* __p = traits_type::find(__sb->gptr(),
	376	__n, __val);
	377	if (__p)
	378	__n = __p - __sb->gptr();
	379	__sb->gbump(__n);
	380	__c = __sb->sgetc();
	381	}
	382	else
	383	__c = __sb->snextc();
	384	}
	385
	386	if (!traits_type::eq_int_type(__c, traits_type::eof()))
	387	__first._M_c = __c;
	388	else
	389	__first._M_sbuf = 0;
	390	}
	391	return __first;
	392	}
	393
3cbc7af0 BK	394	_GLIBCXX_END_NAMESPACE
3cbc7af0 BK	395
b85381b9	396	#endif