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

// Streambuf iterators

// Copyright (C) 1997-2017 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file bits/streambuf_iterator.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{iterator}
 */

#ifndef _STREAMBUF_ITERATOR_H
#define _STREAMBUF_ITERATOR_H 1

#pragma GCC system_header

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

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
     
  /**
   * @addtogroup iterators
   * @{
   */

  // 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*,
#if __cplusplus >= 201103L
    // LWG 445.
		      _CharT>
#else
		      _CharT&>
#endif
    {
    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<bool _IsMove, typename _CharT2>
	friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value, 
					       _CharT2*>::__type
	__copy_move_a2(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;
      int_type			_M_c;

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

#if __cplusplus >= 201103L
      istreambuf_iterator(const istreambuf_iterator&) noexcept = default;

      ~istreambuf_iterator() = default;
#endif

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

      ///  Construct start of streambuf iterator.
      istreambuf_iterator(streambuf_type* __s) _GLIBCXX_USE_NOEXCEPT
      : _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
      {
	int_type __c = _M_get();

#ifdef _GLIBCXX_DEBUG_PEDANTIC
	// Dereferencing a past-the-end istreambuf_iterator is a
	// libstdc++ extension
	__glibcxx_requires_cond(!_S_is_eof(__c),
				_M_message(__gnu_debug::__msg_deref_istreambuf)
				._M_iterator(*this));
#endif
	return traits_type::to_char_type(__c);
      }

      /// Advance the iterator.  Calls streambuf.sbumpc().
      istreambuf_iterator&
      operator++()
      {
	__glibcxx_requires_cond(_M_sbuf &&
				(!_S_is_eof(_M_c) || !_S_is_eof(_M_sbuf->sgetc())),
				_M_message(__gnu_debug::__msg_inc_istreambuf)
				._M_iterator(*this));

	_M_sbuf->sbumpc();
	_M_c = traits_type::eof();
	return *this;
      }

      /// Advance the iterator.  Calls streambuf.sbumpc().
      istreambuf_iterator
      operator++(int)
      {
	__glibcxx_requires_cond(_M_sbuf &&
				(!_S_is_eof(_M_c) || !_S_is_eof(_M_sbuf->sgetc())),
				_M_message(__gnu_debug::__msg_inc_istreambuf)
				._M_iterator(*this));

	istreambuf_iterator __old = *this;
	__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) relevant to 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
      {
	int_type __ret = _M_c;
	if (_M_sbuf && _S_is_eof(__ret) && _S_is_eof(__ret = _M_sbuf->sgetc()))
	  _M_sbuf = 0;
	return __ret;
      }

      bool
      _M_at_eof() const
      { return _S_is_eof(_M_get()); }

      static bool
      _S_is_eof(int_type __c)
      {
	const int_type __eof = traits_type::eof();
	return traits_type::eq_int_type(__c, __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) _GLIBCXX_USE_NOEXCEPT
      : _M_sbuf(__s.rdbuf()), _M_failed(!_M_sbuf) { }

      ///  Construct output iterator from streambuf.
      ostreambuf_iterator(streambuf_type* __s) _GLIBCXX_USE_NOEXCEPT
      : _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 _GLIBCXX_USE_NOEXCEPT
      { 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<bool _IsMove, typename _CharT>
    typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value, 
    				    ostreambuf_iterator<_CharT> >::__type
    __copy_move_a2(_CharT* __first, _CharT* __last,
		   ostreambuf_iterator<_CharT> __result)
    {
      const streamsize __num = __last - __first;
      if (__num > 0)
	__result._M_put(__first, __num);
      return __result;
    }

  template<bool _IsMove, typename _CharT>
    typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
				    ostreambuf_iterator<_CharT> >::__type
    __copy_move_a2(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<bool _IsMove, typename _CharT>
    typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value, 
    				    _CharT*>::__type
    __copy_move_a2(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->__safe_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;
      const int_type __eof = traits_type::eof();

      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, __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->__safe_gbump(__n);
		  __c = __sb->sgetc();
		}
	      else
		__c = __sb->snextc();
	    }

	  __first._M_c = __eof;
	}

      return __first;
    }

// @} group iterators

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace

#endif
Commit	Line	Data
725dc051 BK	1	// Streambuf iterators
725dc051 BK	2
cbe34bb5	3	// Copyright (C) 1997-2017 Free Software Foundation, Inc.
725dc051 BK	4	//
	5	// This file is part of the GNU ISO C++ Library. This library is free
	6	// software; you can redistribute it and/or modify it under the
	7	// terms of the GNU General Public License as published by the
748086b7	8	// Free Software Foundation; either version 3, or (at your option)
725dc051 BK	9	// any later version.
	10
	11	// This library is distributed in the hope that it will be useful,
	12	// but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	// GNU General Public License for more details.
	15
748086b7 JJ	16	// Under Section 7 of GPL version 3, you are granted additional
	17	// permissions described in the GCC Runtime Library Exception, version
	18	// 3.1, as published by the Free Software Foundation.
	19
	20	// You should have received a copy of the GNU General Public License and
	21	// a copy of the GCC Runtime Library Exception along with this program;
	22	// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
	23	// <http://www.gnu.org/licenses/>.
725dc051	24
f910786b	25	/** @file bits/streambuf_iterator.h
729e3d3f	26	* This is an internal header file, included by other library headers.
f910786b	27	* Do not attempt to use it directly. @headername{iterator}
729e3d3f PE	28	*/
729e3d3f PE	29
3d7c150e BK	30	#ifndef _STREAMBUF_ITERATOR_H
3d7c150e BK	31	#define _STREAMBUF_ITERATOR_H 1
725dc051	32
b0a85b86 GDR	33	#pragma GCC system_header
b0a85b86 GDR	34
2e2a38cd	35	#include <streambuf>
285b36d6	36	#include <debug/debug.h>
2e2a38cd	37
12ffa228 BK	38	namespace std _GLIBCXX_VISIBILITY(default)
	39	{
	40	_GLIBCXX_BEGIN_NAMESPACE_VERSION
0002d5d2	41
8e32aa11 BK	42	/**
	43	* @addtogroup iterators
	44	* @{
	45	*/
	46
725dc051	47	// 24.5.3 Template class istreambuf_iterator
ffcec5c8	48	/// Provides input iterator semantics for streambufs.
39003c99	49	template<typename _CharT, typename _Traits>
725dc051 BK	50	class istreambuf_iterator
725dc051 BK	51	: public iterator<input_iterator_tag, _CharT, typename _Traits::off_type,
ebb6e4af	52	_CharT*,
734f5023	53	#if __cplusplus >= 201103L
ebb6e4af PC	54	// LWG 445.
	55	_CharT>
	56	#else
	57	_CharT&>
	58	#endif
725dc051 BK	59	{
725dc051 BK	60	public:
725dc051	61	// Types:
ffcec5c8 JQ	62	//@{
ffcec5c8 JQ	63	/// Public typedefs
ed6814f7 BI	64	typedef _CharT char_type;
	65	typedef _Traits traits_type;
	66	typedef typename _Traits::int_type int_type;
	67	typedef basic_streambuf<_CharT, _Traits> streambuf_type;
	68	typedef basic_istream<_CharT, _Traits> istream_type;
ffcec5c8	69	//@}
725dc051	70
0002d5d2	71	template<typename _CharT2>
105c6331 BK	72	friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
105c6331 BK	73	ostreambuf_iterator<_CharT2> >::__type
0002d5d2 PC	74	copy(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
	75	ostreambuf_iterator<_CharT2>);
	76
f0112db9	77	template<bool _IsMove, typename _CharT2>
105c6331 BK	78	friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
105c6331 BK	79	_CharT2*>::__type
f0112db9 PC	80	__copy_move_a2(istreambuf_iterator<_CharT2>,
f0112db9 PC	81	istreambuf_iterator<_CharT2>, _CharT2*);
0002d5d2 PC	82
0002d5d2 PC	83	template<typename _CharT2>
105c6331 BK	84	friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
105c6331 BK	85	istreambuf_iterator<_CharT2> >::__type
0002d5d2	86	find(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
976e25f4	87	const _CharT2&);
0002d5d2	88
39003c99	89	private:
ed6814f7 BI	90	// 24.5.3 istreambuf_iterator
ed6814f7 BI	91	// p 1
39003c99 BK	92	// If the end of stream is reached (streambuf_type::sgetc()
	93	// returns traits_type::eof()), the iterator becomes equal to
	94	// the "end of stream" iterator value.
	95	// NB: This implementation assumes the "end of stream" value
	96	// is EOF, or -1.
ed6814f7	97	mutable streambuf_type* _M_sbuf;
4e914524	98	int_type _M_c;
39003c99 BK	99
39003c99 BK	100	public:
ffcec5c8	101	/// Construct end of input stream iterator.
23e4c4ee	102	_GLIBCXX_CONSTEXPR istreambuf_iterator() _GLIBCXX_USE_NOEXCEPT
f13a69ec	103	: _M_sbuf(0), _M_c(traits_type::eof()) { }
ed6814f7	104
734f5023	105	#if __cplusplus >= 201103L
23e4c4ee PC	106	istreambuf_iterator(const istreambuf_iterator&) noexcept = default;
	107
	108	~istreambuf_iterator() = default;
	109	#endif
	110
ffcec5c8	111	/// Construct start of input stream iterator.
23e4c4ee	112	istreambuf_iterator(istream_type& __s) _GLIBCXX_USE_NOEXCEPT
f13a69ec	113	: _M_sbuf(__s.rdbuf()), _M_c(traits_type::eof()) { }
725dc051	114
ffcec5c8	115	/// Construct start of streambuf iterator.
23e4c4ee	116	istreambuf_iterator(streambuf_type* __s) _GLIBCXX_USE_NOEXCEPT
f13a69ec	117	: _M_sbuf(__s), _M_c(traits_type::eof()) { }
ed6814f7	118
ffcec5c8 JQ	119	/// Return the current character pointed to by iterator. This returns
	120	/// streambuf.sgetc(). It cannot be assigned. NB: The result of
	121	/// operator*() on an end of stream is undefined.
ed6814f7	122	char_type
725dc051	123	operator*() const
ed6814f7	124	{
4e914524 PO	125	int_type __c = _M_get();
4e914524 PO	126
285b36d6 BK	127	#ifdef _GLIBCXX_DEBUG_PEDANTIC
	128	// Dereferencing a past-the-end istreambuf_iterator is a
	129	// libstdc++ extension
4e914524	130	__glibcxx_requires_cond(!_S_is_eof(__c),
285b36d6	131	_M_message(__gnu_debug::__msg_deref_istreambuf)
ed6814f7	132	._M_iterator(*this));
285b36d6	133	#endif
4e914524	134	return traits_type::to_char_type(__c);
285b36d6	135	}
ffcec5c8 JQ	136
ffcec5c8 JQ	137	/// Advance the iterator. Calls streambuf.sbumpc().
ed6814f7	138	istreambuf_iterator&
725dc051	139	operator++()
ed6814f7	140	{
4e914524 PO	141	__glibcxx_requires_cond(_M_sbuf &&
4e914524 PO	142	(!_S_is_eof(_M_c) \|\| !_S_is_eof(_M_sbuf->sgetc())),
285b36d6	143	_M_message(__gnu_debug::__msg_inc_istreambuf)
ed6814f7	144	._M_iterator(*this));
4e914524 PO	145
	146	_M_sbuf->sbumpc();
	147	_M_c = traits_type::eof();
ed6814f7	148	return *this;
725dc051 BK	149	}
725dc051 BK	150
ffcec5c8	151	/// Advance the iterator. Calls streambuf.sbumpc().
b581eaf7	152	istreambuf_iterator
725dc051 BK	153	operator++(int)
725dc051 BK	154	{
4e914524 PO	155	__glibcxx_requires_cond(_M_sbuf &&
4e914524 PO	156	(!_S_is_eof(_M_c) \|\| !_S_is_eof(_M_sbuf->sgetc())),
285b36d6	157	_M_message(__gnu_debug::__msg_inc_istreambuf)
ed6814f7	158	._M_iterator(*this));
285b36d6	159
b581eaf7	160	istreambuf_iterator __old = *this;
4e914524 PO	161	__old._M_c = _M_sbuf->sbumpc();
4e914524 PO	162	_M_c = traits_type::eof();
ed6814f7	163	return __old;
725dc051	164	}
725dc051	165
f5677b15	166	// _GLIBCXX_RESOLVE_LIB_DEFECTS
725dc051	167	// 110 istreambuf_iterator::equal not const
0e7300bb	168	// NB: there is also number 111 (NAD) relevant to this function.
ffcec5c8	169	/// Return true both iterators are end or both are not end.
ed6814f7	170	bool
b581eaf7	171	equal(const istreambuf_iterator& __b) const
6bfcbf0d	172	{ return _M_at_eof() == __b._M_at_eof(); }
9875ea05 BK	173
9875ea05 BK	174	private:
ed6814f7	175	int_type
9875ea05	176	_M_get() const
ed6814f7	177	{
4e914524 PO	178	int_type __ret = _M_c;
	179	if (_M_sbuf && _S_is_eof(__ret) && _S_is_eof(__ret = _M_sbuf->sgetc()))
	180	_M_sbuf = 0;
9875ea05 BK	181	return __ret;
9875ea05 BK	182	}
285b36d6	183
ed6814f7	184	bool
285b36d6	185	_M_at_eof() const
4e914524 PO	186	{ return _S_is_eof(_M_get()); }
	187
	188	static bool
	189	_S_is_eof(int_type __c)
285b36d6 BK	190	{
285b36d6 BK	191	const int_type __eof = traits_type::eof();
4e914524	192	return traits_type::eq_int_type(__c, __eof);
285b36d6	193	}
725dc051 BK	194	};
	195
	196	template<typename _CharT, typename _Traits>
ed6814f7	197	inline bool
725dc051 BK	198	operator==(const istreambuf_iterator<_CharT, _Traits>& __a,
	199	const istreambuf_iterator<_CharT, _Traits>& __b)
	200	{ return __a.equal(__b); }
	201
	202	template<typename _CharT, typename _Traits>
ed6814f7	203	inline bool
725dc051 BK	204	operator!=(const istreambuf_iterator<_CharT, _Traits>& __a,
	205	const istreambuf_iterator<_CharT, _Traits>& __b)
	206	{ return !__a.equal(__b); }
5c352a47	207
ffcec5c8	208	/// Provides output iterator semantics for streambufs.
5c352a47 BK	209	template<typename _CharT, typename _Traits>
	210	class ostreambuf_iterator
	211	: public iterator<output_iterator_tag, void, void, void, void>
	212	{
	213	public:
	214	// Types:
ffcec5c8 JQ	215	//@{
ffcec5c8 JQ	216	/// Public typedefs
5c352a47 BK	217	typedef _CharT char_type;
	218	typedef _Traits traits_type;
	219	typedef basic_streambuf<_CharT, _Traits> streambuf_type;
	220	typedef basic_ostream<_CharT, _Traits> ostream_type;
ffcec5c8	221	//@}
5c352a47	222
0002d5d2	223	template<typename _CharT2>
105c6331 BK	224	friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
105c6331 BK	225	ostreambuf_iterator<_CharT2> >::__type
0002d5d2 PC	226	copy(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
	227	ostreambuf_iterator<_CharT2>);
	228
5c352a47	229	private:
ed6814f7 BI	230	streambuf_type* _M_sbuf;
ed6814f7 BI	231	bool _M_failed;
5c352a47 BK	232
5c352a47 BK	233	public:
ffcec5c8	234	/// Construct output iterator from ostream.
23e4c4ee	235	ostreambuf_iterator(ostream_type& __s) _GLIBCXX_USE_NOEXCEPT
5c352a47	236	: _M_sbuf(__s.rdbuf()), _M_failed(!_M_sbuf) { }
ed6814f7	237
ffcec5c8	238	/// Construct output iterator from streambuf.
23e4c4ee	239	ostreambuf_iterator(streambuf_type* __s) _GLIBCXX_USE_NOEXCEPT
5c352a47 BK	240	: _M_sbuf(__s), _M_failed(!_M_sbuf) { }
5c352a47 BK	241
ffcec5c8	242	/// Write character to streambuf. Calls streambuf.sputc().
ed6814f7	243	ostreambuf_iterator&
2e2a38cd BK	244	operator=(_CharT __c)
2e2a38cd BK	245	{
ed6814f7	246	if (!_M_failed &&
2e2a38cd BK	247	_Traits::eq_int_type(_M_sbuf->sputc(__c), _Traits::eof()))
	248	_M_failed = true;
	249	return *this;
	250	}
5c352a47	251
ffcec5c8	252	/// Return *this.
ed6814f7	253	ostreambuf_iterator&
e0ec69c9	254	operator*()
5c352a47 BK	255	{ return *this; }
5c352a47 BK	256
ffcec5c8	257	/// Return *this.
ed6814f7	258	ostreambuf_iterator&
e0ec69c9	259	operator++(int)
5c352a47 BK	260	{ return *this; }
5c352a47 BK	261
ffcec5c8	262	/// Return *this.
ed6814f7	263	ostreambuf_iterator&
e0ec69c9	264	operator++()
5c352a47 BK	265	{ return *this; }
5c352a47 BK	266
ffcec5c8	267	/// Return true if previous operator=() failed.
ed6814f7	268	bool
23e4c4ee	269	failed() const _GLIBCXX_USE_NOEXCEPT
5c352a47	270	{ return _M_failed; }
5c352a47	271
ed6814f7	272	ostreambuf_iterator&
2e2a38cd BK	273	_M_put(const _CharT* __ws, streamsize __len)
2e2a38cd BK	274	{
53279c10	275	if (__builtin_expect(!_M_failed, true)
15d72060 PC	276	&& __builtin_expect(this->_M_sbuf->sputn(__ws, __len) != __len,
15d72060 PC	277	false))
53279c10	278	_M_failed = true;
2e2a38cd BK	279	return *this;
	280	}
	281	};
3cbc7af0	282
0002d5d2 PC	283	// Overloads for streambuf iterators.
0002d5d2 PC	284	template<typename _CharT>
105c6331 BK	285	typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
105c6331 BK	286	ostreambuf_iterator<_CharT> >::__type
0002d5d2 PC	287	copy(istreambuf_iterator<_CharT> __first,
	288	istreambuf_iterator<_CharT> __last,
	289	ostreambuf_iterator<_CharT> __result)
	290	{
	291	if (__first._M_sbuf && !__last._M_sbuf && !__result._M_failed)
	292	{
	293	bool __ineof;
	294	__copy_streambufs_eof(__first._M_sbuf, __result._M_sbuf, __ineof);
	295	if (!__ineof)
	296	__result._M_failed = true;
	297	}
	298	return __result;
	299	}
	300
f0112db9	301	template<bool _IsMove, typename _CharT>
105c6331 BK	302	typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
105c6331 BK	303	ostreambuf_iterator<_CharT> >::__type
f0112db9 PC	304	__copy_move_a2(_CharT* __first, _CharT* __last,
f0112db9 PC	305	ostreambuf_iterator<_CharT> __result)
0002d5d2 PC	306	{
	307	const streamsize __num = __last - __first;
	308	if (__num > 0)
	309	__result._M_put(__first, __num);
	310	return __result;
	311	}
	312
f0112db9	313	template<bool _IsMove, typename _CharT>
105c6331 BK	314	typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
105c6331 BK	315	ostreambuf_iterator<_CharT> >::__type
f0112db9 PC	316	__copy_move_a2(const _CharT* __first, const _CharT* __last,
f0112db9 PC	317	ostreambuf_iterator<_CharT> __result)
0002d5d2 PC	318	{
	319	const streamsize __num = __last - __first;
	320	if (__num > 0)
	321	__result._M_put(__first, __num);
	322	return __result;
	323	}
	324
f0112db9	325	template<bool _IsMove, typename _CharT>
105c6331 BK	326	typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
105c6331 BK	327	_CharT*>::__type
f0112db9 PC	328	__copy_move_a2(istreambuf_iterator<_CharT> __first,
f0112db9 PC	329	istreambuf_iterator<_CharT> __last, _CharT* __result)
0002d5d2 PC	330	{
	331	typedef istreambuf_iterator<_CharT> __is_iterator_type;
	332	typedef typename __is_iterator_type::traits_type traits_type;
	333	typedef typename __is_iterator_type::streambuf_type streambuf_type;
	334	typedef typename traits_type::int_type int_type;
	335
	336	if (__first._M_sbuf && !__last._M_sbuf)
	337	{
	338	streambuf_type* __sb = __first._M_sbuf;
	339	int_type __c = __sb->sgetc();
	340	while (!traits_type::eq_int_type(__c, traits_type::eof()))
	341	{
	342	const streamsize __n = __sb->egptr() - __sb->gptr();
	343	if (__n > 1)
	344	{
	345	traits_type::copy(__result, __sb->gptr(), __n);
1139a735	346	__sb->__safe_gbump(__n);
0002d5d2 PC	347	__result += __n;
	348	__c = __sb->underflow();
	349	}
	350	else
	351	{
	352	*__result++ = traits_type::to_char_type(__c);
	353	__c = __sb->snextc();
	354	}
	355	}
	356	}
	357	return __result;
	358	}
	359
	360	template<typename _CharT>
105c6331 BK	361	typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
105c6331 BK	362	istreambuf_iterator<_CharT> >::__type
0002d5d2	363	find(istreambuf_iterator<_CharT> __first,
976e25f4	364	istreambuf_iterator<_CharT> __last, const _CharT& __val)
0002d5d2 PC	365	{
	366	typedef istreambuf_iterator<_CharT> __is_iterator_type;
	367	typedef typename __is_iterator_type::traits_type traits_type;
	368	typedef typename __is_iterator_type::streambuf_type streambuf_type;
	369	typedef typename traits_type::int_type int_type;
4e914524	370	const int_type __eof = traits_type::eof();
0002d5d2 PC	371
	372	if (__first._M_sbuf && !__last._M_sbuf)
	373	{
	374	const int_type __ival = traits_type::to_int_type(__val);
	375	streambuf_type* __sb = __first._M_sbuf;
	376	int_type __c = __sb->sgetc();
4e914524	377	while (!traits_type::eq_int_type(__c, __eof)
0002d5d2 PC	378	&& !traits_type::eq_int_type(__c, __ival))
	379	{
	380	streamsize __n = __sb->egptr() - __sb->gptr();
	381	if (__n > 1)
	382	{
	383	const _CharT* __p = traits_type::find(__sb->gptr(),
	384	__n, __val);
	385	if (__p)
	386	__n = __p - __sb->gptr();
1139a735	387	__sb->__safe_gbump(__n);
0002d5d2 PC	388	__c = __sb->sgetc();
	389	}
	390	else
	391	__c = __sb->snextc();
	392	}
	393
4e914524	394	__first._M_c = __eof;
0002d5d2	395	}
4e914524	396
0002d5d2 PC	397	return __first;
	398	}
	399
8e32aa11 BK	400	// @} group iterators
8e32aa11 BK	401
12ffa228 BK	402	_GLIBCXX_END_NAMESPACE_VERSION
12ffa228 BK	403	} // namespace
3cbc7af0	404
b85381b9	405	#endif