4 * Hewlett-Packard Company
6 * Copyright (c) 1996-1998
7 * Silicon Graphics Computer Systems, Inc.
10 * Moscow Center for SPARC Technology
15 * This material is provided "as is", with absolutely no warranty expressed
16 * or implied. Any use is at your own risk.
18 * Permission to use or copy this software for any purpose is hereby granted
19 * without fee, provided the above notices are retained on all copies.
20 * Permission to modify the code and to distribute modified code is granted,
21 * provided the above notices are retained, and a notice that the code was
22 * modified is included with the above copyright notice.
26 /* NOTE: This is an internal header file, included by other STL headers.
27 * You should not attempt to use it directly.
30 #if !defined (_STLP_INTERNAL_STREAM_ITERATOR_H) && !defined (_STLP_USE_NO_IOSTREAMS)
31 #define _STLP_INTERNAL_STREAM_ITERATOR_H
33 #ifndef _STLP_INTERNAL_ITERATOR_BASE_H
34 # include <stl/_iterator_base.h>
37 // streambuf_iterators predeclarations must appear first
42 #ifndef _STLP_INTERNAL_ALGOBASE_H
43 # include <stl/_algobase.h>
46 #ifndef _STLP_INTERNAL_OSTREAMBUF_ITERATOR_H
47 # include <stl/_ostreambuf_iterator.h>
50 #ifndef _STLP_INTERNAL_ISTREAMBUF_ITERATOR_H
51 # include <stl/_istreambuf_iterator.h>
54 #ifndef _STLP_INTERNAL_ISTREAM
55 # include <stl/_istream.h>
58 // istream_iterator and ostream_iterator look very different if we're
59 // using new, templatized iostreams than if we're using the old cfront
64 #if !defined (_STLP_LIMITED_DEFAULT_TEMPLATES)
65 # define __ISI_TMPL_HEADER_ARGUMENTS class _Tp, class _CharT, class _Traits, class _Dist
66 # define __ISI_TMPL_ARGUMENTS _Tp, _CharT, _Traits, _Dist
68 class _CharT = _STLP_DEFAULTCHAR, class _Traits = char_traits<_CharT>,
69 class _Dist = ptrdiff_t>
70 class istream_iterator : public iterator<input_iterator_tag, _Tp , _Dist,
71 const _Tp*, const _Tp& > {
73 # if defined (_STLP_MINIMUM_DEFAULT_TEMPLATE_PARAMS) && !defined (_STLP_DEFAULT_TYPE_PARAM)
74 # define __ISI_TMPL_HEADER_ARGUMENTS class _Tp
75 # define __ISI_TMPL_ARGUMENTS _Tp
77 class istream_iterator : public iterator<input_iterator_tag, _Tp , ptrdiff_t,
78 const _Tp*, const _Tp& > {
80 # define __ISI_TMPL_HEADER_ARGUMENTS class _Tp, class _Dist
81 # define __ISI_TMPL_ARGUMENTS _Tp, _Dist
82 template <class _Tp, _STLP_DFL_TYPE_PARAM(_Dist, ptrdiff_t)>
83 class istream_iterator : public iterator<input_iterator_tag, _Tp, _Dist ,
84 const _Tp*, const _Tp& > {
85 # endif /* _STLP_MINIMUM_DEFAULT_TEMPLATE_PARAMS */
86 #endif /* _STLP_LIMITED_DEFAULT_TEMPLATES */
88 #if defined (_STLP_LIMITED_DEFAULT_TEMPLATES)
90 typedef char_traits<char> _Traits;
91 # if defined (_STLP_MINIMUM_DEFAULT_TEMPLATE_PARAMS) && !defined (_STLP_DEFAULT_TYPE_PARAM)
92 typedef ptrdiff_t _Dist;
96 typedef istream_iterator< __ISI_TMPL_ARGUMENTS > _Self;
98 typedef _CharT char_type;
99 typedef _Traits traits_type;
100 typedef basic_istream<_CharT, _Traits> istream_type;
102 typedef input_iterator_tag iterator_category;
103 typedef _Tp value_type;
104 typedef _Dist difference_type;
105 typedef const _Tp* pointer;
106 typedef const _Tp& reference;
108 istream_iterator() : _M_stream(0), _M_ok(false), _M_read_done(true) {}
109 istream_iterator(istream_type& __s) : _M_stream(&__s), _M_ok(false), _M_read_done(false) {}
111 reference operator*() const {
118 _STLP_DEFINE_ARROW_OPERATOR
120 _Self& operator++() {
124 _Self operator++(int) {
130 bool _M_equal(const _Self& __x) const {
134 if (!__x._M_read_done) {
137 return (_M_ok == __x._M_ok) && (!_M_ok || _M_stream == __x._M_stream);
141 istream_type* _M_stream;
142 mutable _Tp _M_value;
144 mutable bool _M_read_done;
146 void _M_read() const {
147 _M_ok = ((_M_stream != 0) && !_M_stream->fail());
149 *_M_stream >> _M_value;
150 _M_ok = !_M_stream->fail();
156 #if !defined (_STLP_LIMITED_DEFAULT_TEMPLATES)
157 template <class _TpP,
158 class _CharT = _STLP_DEFAULTCHAR, class _Traits = char_traits<_CharT> >
160 template <class _TpP>
162 class ostream_iterator: public iterator<output_iterator_tag, void, void, void, void> {
163 #if defined (_STLP_LIMITED_DEFAULT_TEMPLATES)
165 typedef char_traits<char> _Traits;
166 typedef ostream_iterator<_TpP> _Self;
168 typedef ostream_iterator<_TpP, _CharT, _Traits> _Self;
171 typedef _CharT char_type;
172 typedef _Traits traits_type;
173 typedef basic_ostream<_CharT, _Traits> ostream_type;
175 typedef output_iterator_tag iterator_category;
177 ostream_iterator(ostream_type& __s) : _M_stream(&__s), _M_string(0) {}
178 ostream_iterator(ostream_type& __s, const _CharT* __c)
179 : _M_stream(&__s), _M_string(__c) {}
180 _Self& operator=(const _TpP& __val) {
182 if (_M_string) *_M_stream << _M_string;
185 _Self& operator*() { return *this; }
186 _Self& operator++() { return *this; }
187 _Self& operator++(int) { return *this; }
189 ostream_type* _M_stream;
190 const _CharT* _M_string;
193 #if defined (_STLP_USE_OLD_HP_ITERATOR_QUERIES)
194 # if defined (_STLP_LIMITED_DEFAULT_TEMPLATES)
195 template <class _TpP>
196 inline output_iterator_tag _STLP_CALL
197 iterator_category(const ostream_iterator<_TpP>&) { return output_iterator_tag(); }
199 template <class _TpP, class _CharT, class _Traits>
200 inline output_iterator_tag _STLP_CALL
201 iterator_category(const ostream_iterator<_TpP, _CharT, _Traits>&) { return output_iterator_tag(); }
207 // form-independent definiotion of stream iterators
208 _STLP_BEGIN_NAMESPACE
210 template < __ISI_TMPL_HEADER_ARGUMENTS >
211 inline bool _STLP_CALL
212 operator==(const istream_iterator< __ISI_TMPL_ARGUMENTS >& __x,
213 const istream_iterator< __ISI_TMPL_ARGUMENTS >& __y)
214 { return __x._M_equal(__y); }
216 #if defined (_STLP_USE_SEPARATE_RELOPS_NAMESPACE)
217 template < __ISI_TMPL_HEADER_ARGUMENTS >
218 inline bool _STLP_CALL
219 operator!=(const istream_iterator< __ISI_TMPL_ARGUMENTS >& __x,
220 const istream_iterator< __ISI_TMPL_ARGUMENTS >& __y)
221 { return !__x._M_equal(__y); }
224 #if defined (_STLP_USE_OLD_HP_ITERATOR_QUERIES)
225 template < __ISI_TMPL_HEADER_ARGUMENTS >
226 inline input_iterator_tag _STLP_CALL
227 iterator_category(const istream_iterator< __ISI_TMPL_ARGUMENTS >&)
228 { return input_iterator_tag(); }
229 template < __ISI_TMPL_HEADER_ARGUMENTS >
230 inline _Tp* _STLP_CALL
231 value_type(const istream_iterator< __ISI_TMPL_ARGUMENTS >&) { return (_Tp*) 0; }
233 # if defined (_STLP_MINIMUM_DEFAULT_TEMPLATE_PARAMS) && !defined (_STLP_DEFAULT_TYPE_PARAM)
234 template < __ISI_TMPL_HEADER_ARGUMENTS >
235 inline ptrdiff_t* _STLP_CALL
236 distance_type(const istream_iterator< __ISI_TMPL_ARGUMENTS >&) { return (ptrdiff_t*)0; }
238 template < __ISI_TMPL_HEADER_ARGUMENTS >
239 inline _Dist* _STLP_CALL
240 distance_type(const istream_iterator< __ISI_TMPL_ARGUMENTS >&) { return (_Dist*)0; }
241 # endif /* _STLP_MINIMUM_DEFAULT_TEMPLATE_PARAMS */
246 #undef __ISI_TMPL_HEADER_ARGUMENTS
247 #undef __ISI_TMPL_ARGUMENTS
249 #endif /* _STLP_INTERNAL_STREAM_ITERATOR_H */