3 // Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
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
8 // Free Software Foundation; either version 2, or (at your option)
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.
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING. If not, write to the Free
18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
21 // As a special exception, you may use this file as part of a free software
22 // library without restriction. Specifically, if other files instantiate
23 // templates or use macros or inline functions from this file, or you compile
24 // this file and link it with other files to produce an executable, this
25 // file does not by itself cause the resulting executable to be covered by
26 // the GNU General Public License. This exception does not however
27 // invalidate any other reasons why the executable file might be covered by
28 // the GNU General Public License.
30 // XXX Should specialize copy, find algorithms for streambuf iterators.
32 /** @file streambuf_iterator.h
33 * This is an internal header file, included by other library headers.
34 * You should not attempt to use it directly.
37 #ifndef _CPP_BITS_STREAMBUF_ITERATOR_H
38 #define _CPP_BITS_STREAMBUF_ITERATOR_H 1
40 #pragma GCC system_header
44 template<typename _CharT, typename _Traits>
45 class ostreambuf_iterator
46 : public iterator<output_iterator_tag, void, void, void, void>
50 typedef _CharT char_type;
51 typedef _Traits traits_type;
52 typedef basic_streambuf<_CharT, _Traits> streambuf_type;
53 typedef basic_ostream<_CharT, _Traits> ostream_type;
56 streambuf_type* _M_sbuf;
61 ostreambuf_iterator(ostream_type& __s) throw ()
62 : _M_sbuf(__s.rdbuf()), _M_failed(!_M_sbuf) { }
64 ostreambuf_iterator(streambuf_type* __s) throw ()
65 : _M_sbuf(__s), _M_failed(!_M_sbuf) { }
68 operator=(_CharT __c);
75 operator++(int) throw()
83 failed() const throw()
87 template<typename _CharT, typename _Traits>
88 inline ostreambuf_iterator<_CharT, _Traits>&
89 ostreambuf_iterator<_CharT, _Traits>::operator=(_CharT __c)
92 _Traits::eq_int_type(_M_sbuf->sputc(__c),_Traits::eof()))
98 // 24.5.3 Template class istreambuf_iterator
99 template<typename _CharT, typename _Traits>
100 class istreambuf_iterator
101 : public iterator<input_iterator_tag, _CharT, typename _Traits::off_type,
106 typedef _CharT char_type;
107 typedef _Traits traits_type;
108 typedef typename _Traits::int_type int_type;
109 typedef basic_streambuf<_CharT, _Traits> streambuf_type;
110 typedef basic_istream<_CharT, _Traits> istream_type;
113 // 24.5.3 istreambuf_iterator
115 // If the end of stream is reached (streambuf_type::sgetc()
116 // returns traits_type::eof()), the iterator becomes equal to
117 // the "end of stream" iterator value.
118 // NB: This implementation assumes the "end of stream" value
120 streambuf_type* _M_sbuf;
124 istreambuf_iterator() throw()
125 : _M_sbuf(NULL), _M_c(-2) { }
127 istreambuf_iterator(istream_type& __s) throw()
128 : _M_sbuf(__s.rdbuf()), _M_c(-2) { }
130 istreambuf_iterator(streambuf_type* __s) throw()
131 : _M_sbuf(__s), _M_c(-2) { }
133 // NB: This should really have an int_type return
134 // value, so "end of stream" postion can be checked without
139 // The result of operator*() on an end of stream is undefined.
141 if (_M_sbuf && _M_c != static_cast<int_type>(-2))
144 __ret = traits_type::to_char_type(_M_sbuf->sgetc());
146 __ret = static_cast<char_type>(traits_type::eof());
162 istreambuf_iterator __old = *this;
164 __old._M_c = _M_sbuf->sbumpc();
170 equal(const istreambuf_iterator& __b)
172 int_type __eof = traits_type::eof();
173 bool __thiseof = !_M_sbuf || _M_sbuf->sgetc() == __eof;
174 bool __beof = !__b._M_sbuf || __b._M_sbuf->sgetc() == __eof;
175 return (__thiseof && __beof || (!__thiseof && !__beof));
178 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
179 // 110 istreambuf_iterator::equal not const
180 // NB: there is also number 111 (NAD, Future) pending on this function.
182 equal(const istreambuf_iterator& __b) const
184 int_type __eof = traits_type::eof();
185 bool __thiseof = !_M_sbuf || _M_sbuf->sgetc() == __eof;
186 bool __beof = !__b._M_sbuf || __b._M_sbuf->sgetc() == __eof;
187 return (__thiseof && __beof || (!__thiseof && !__beof));
192 template<typename _CharT, typename _Traits>
194 operator==(const istreambuf_iterator<_CharT, _Traits>& __a,
195 const istreambuf_iterator<_CharT, _Traits>& __b)
196 { return __a.equal(__b); }
198 template<typename _CharT, typename _Traits>
200 operator!=(const istreambuf_iterator<_CharT, _Traits>& __a,
201 const istreambuf_iterator<_CharT, _Traits>& __b)
202 { return !__a.equal(__b); }