1 /* 2 * 3 * Copyright (c) 1994 4 * Hewlett-Packard Company 5 * 6 * Copyright (c) 1996-1998 7 * Silicon Graphics Computer Systems, Inc. 8 * 9 * Copyright (c) 1997 10 * Moscow Center for SPARC Technology 11 * 12 * Copyright (c) 1999 13 * Boris Fomitchev 14 * 15 * This material is provided "as is", with absolutely no warranty expressed 16 * or implied. Any use is at your own risk. 17 * 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. 23 * 24 */ 25 26 /* NOTE: This is an internal header file, included by other STL headers. 27 * You should not attempt to use it directly. 28 */ 29 30 #if !defined (_STLP_INTERNAL_STREAM_ITERATOR_H) && !defined (_STLP_USE_NO_IOSTREAMS) 31 #define _STLP_INTERNAL_STREAM_ITERATOR_H 32 33 #ifndef _STLP_INTERNAL_ITERATOR_BASE_H 34 # include <stl/_iterator_base.h> 35 #endif 36 37 // streambuf_iterators predeclarations must appear first 38 #ifndef _STLP_INTERNAL_IOSFWD 39 # include <stl/_iosfwd.h> 40 #endif 41 42 #ifndef _STLP_INTERNAL_ALGOBASE_H 43 # include <stl/_algobase.h> 44 #endif 45 46 #ifndef _STLP_INTERNAL_OSTREAMBUF_ITERATOR_H 47 # include <stl/_ostreambuf_iterator.h> 48 #endif 49 50 #ifndef _STLP_INTERNAL_ISTREAMBUF_ITERATOR_H 51 # include <stl/_istreambuf_iterator.h> 52 #endif 53 54 #ifndef _STLP_INTERNAL_ISTREAM 55 # include <stl/_istream.h> 56 #endif 57 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 60 // version. 61 62 _STLP_BEGIN_NAMESPACE 63 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 67 template <class _Tp, 68 class _CharT = char, 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& > { 72 #else 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 76 template <class _Tp> 77 class istream_iterator : public iterator<input_iterator_tag, _Tp , ptrdiff_t, 78 const _Tp*, const _Tp& > { 79 # else 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 */ 87 88 #if defined (_STLP_LIMITED_DEFAULT_TEMPLATES) 89 typedef char _CharT; 90 typedef char_traits<char> _Traits; 91 # if defined (_STLP_MINIMUM_DEFAULT_TEMPLATE_PARAMS) && !defined (_STLP_DEFAULT_TYPE_PARAM) 92 typedef ptrdiff_t _Dist; 93 # endif 94 #endif 95 96 typedef istream_iterator< __ISI_TMPL_ARGUMENTS > _Self; 97 public: 98 typedef _CharT char_type; 99 typedef _Traits traits_type; 100 typedef basic_istream<_CharT, _Traits> istream_type; 101 102 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; 107 108 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) {} 110 111 reference operator*() const { 112 if (!_M_read_done) { 113 _M_read(); 114 } 115 return _M_value; 116 } 117 118 _STLP_DEFINE_ARROW_OPERATOR 119 120 _Self& operator++() { 121 _M_read(); 122 return *this; 123 } 124 _Self operator++(int) { 125 _Self __tmp = *this; 126 _M_read(); 127 return __tmp; 128 } 129 130 bool _M_equal(const _Self& __x) const { 131 if (!_M_read_done) { 132 _M_read(); 133 } 134 if (!__x._M_read_done) { 135 __x._M_read(); 136 } 137 return (_M_ok == __x._M_ok) && (!_M_ok || _M_stream == __x._M_stream); 138 } 139 140 private: 141 istream_type* _M_stream; 142 mutable _Tp _M_value; 143 mutable bool _M_ok; 144 mutable bool _M_read_done; 145 146 void _M_read() const { 147 _STLP_MUTABLE(_Self, _M_ok) = ((_M_stream != 0) && !_M_stream->fail()); 148 if (_M_ok) { 149 *_M_stream >> _STLP_MUTABLE(_Self, _M_value); 150 _STLP_MUTABLE(_Self, _M_ok) = !_M_stream->fail(); 151 } 152 _STLP_MUTABLE(_Self, _M_read_done) = true; 153 } 154 }; 155 156 #if !defined (_STLP_LIMITED_DEFAULT_TEMPLATES) 157 template <class _TpP, 158 class _CharT = char, class _Traits = char_traits<_CharT> > 159 #else 160 template <class _TpP> 161 #endif 162 class ostream_iterator: public iterator<output_iterator_tag, void, void, void, void> { 163 #if defined (_STLP_LIMITED_DEFAULT_TEMPLATES) 164 typedef char _CharT; 165 typedef char_traits<char> _Traits; 166 typedef ostream_iterator<_TpP> _Self; 167 #else 168 typedef ostream_iterator<_TpP, _CharT, _Traits> _Self; 169 #endif 170 public: 171 typedef _CharT char_type; 172 typedef _Traits traits_type; 173 typedef basic_ostream<_CharT, _Traits> ostream_type; 174 175 typedef output_iterator_tag iterator_category; 176 177 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) { 181 *_M_stream << __val; 182 if (_M_string) *_M_stream << _M_string; 183 return *this; 184 } 185 _Self& operator*() { return *this; } 186 _Self& operator++() { return *this; } 187 _Self& operator++(int) { return *this; } 188 private: 189 ostream_type* _M_stream; 190 const _CharT* _M_string; 191 }; 192 193 #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(); } 198 # else 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(); } 202 # endif 203 #endif 204 205 _STLP_END_NAMESPACE 206 207 // form-independent definiotion of stream iterators 208 _STLP_BEGIN_NAMESPACE 209 210 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); } 215 216 #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); } 222 #endif 223 224 #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; } 232 233 # 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; } 237 # else 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 */ 242 #endif 243 244 _STLP_END_NAMESPACE 245 246 #undef __ISI_TMPL_HEADER_ARGUMENTS 247 #undef __ISI_TMPL_ARGUMENTS 248 249 #endif /* _STLP_INTERNAL_STREAM_ITERATOR_H */ 250 251 // Local Variables: 252 // mode:C++ 253 // End: 254
