1 /* 2 * Copyright (c) 1999 3 * Silicon Graphics Computer Systems, Inc. 4 * 5 * Copyright (c) 1999 6 * Boris Fomitchev 7 * 8 * This material is provided "as is", with absolutely no warranty expressed 9 * or implied. Any use is at your own risk. 10 * 11 * Permission to use or copy this software for any purpose is hereby granted 12 * without fee, provided the above notices are retained on all copies. 13 * Permission to modify the code and to distribute modified code is granted, 14 * provided the above notices are retained, and a notice that the code was 15 * modified is included with the above copyright notice. 16 * 17 */ 18 #ifndef _STLP_INTERNAL_ISTREAM 19 #define _STLP_INTERNAL_ISTREAM 20 21 // this block is included by _ostream.h, we include it here to lower #include level 22 #if defined (_STLP_HAS_WCHAR_T) && !defined (_STLP_INTERNAL_CWCHAR) 23 # include <stl/_cwchar.h> 24 #endif 25 26 #ifndef _STLP_INTERNAL_IOS_H 27 # include <stl/_ios.h> // For basic_ios<>. Includes <iosfwd>. 28 #endif 29 30 #ifndef _STLP_INTERNAL_OSTREAM_H 31 # include <stl/_ostream.h> // Needed as a base class of basic_iostream. 32 #endif 33 34 #ifndef _STLP_INTERNAL_ISTREAMBUF_ITERATOR_H 35 # include <stl/_istreambuf_iterator.h> 36 #endif 37 38 #include <stl/_ctraits_fns.h> // Helper functions that allow char traits 39 // to be used as function objects. 40 _STLP_BEGIN_NAMESPACE 41 42 #if defined (_STLP_USE_TEMPLATE_EXPORT) 43 template <class _CharT, class _Traits> 44 class _Isentry; 45 #endif 46 47 struct _No_Skip_WS {}; // Dummy class used by sentry. 48 49 template <class _CharT, class _Traits> 50 bool _M_init_skip(basic_istream<_CharT, _Traits>& __istr); 51 template <class _CharT, class _Traits> 52 bool _M_init_noskip(basic_istream<_CharT, _Traits>& __istr); 53 54 //---------------------------------------------------------------------- 55 // Class basic_istream, a class that performs formatted input through 56 // a stream buffer. 57 58 // The second template parameter, _Traits, defaults to char_traits<_CharT>. 59 // The default is declared in header <iosfwd>, and it isn't declared here 60 // because C++ language rules do not allow it to be declared twice. 61 62 template <class _CharT, class _Traits> 63 class basic_istream : virtual public basic_ios<_CharT, _Traits> { 64 typedef basic_istream<_CharT, _Traits> _Self; 65 66 #if defined (_STLP_MSVC) && (_STLP_MSVC >= 1300 && _STLP_MSVC <= 1310) 67 //explicitely defined as private to avoid warnings: 68 basic_istream(_Self const&); 69 _Self& operator = (_Self const&); 70 #endif 71 72 public: 73 // Types 74 typedef _CharT char_type; 75 typedef typename _Traits::int_type int_type; 76 typedef typename _Traits::pos_type pos_type; 77 typedef typename _Traits::off_type off_type; 78 typedef _Traits traits_type; 79 typedef basic_ios<_CharT, _Traits> _Basic_ios; 80 81 typedef basic_ios<_CharT, _Traits>& (_STLP_CALL *__ios_fn)(basic_ios<_CharT, _Traits>&); 82 typedef ios_base& (_STLP_CALL *__ios_base_fn)(ios_base&); 83 typedef _Self& (_STLP_CALL *__istream_fn)(_Self&); 84 85 public: // Constructor and destructor. basic_istream(basic_streambuf<_CharT,_Traits> * __buf)86 explicit basic_istream(basic_streambuf<_CharT, _Traits>* __buf) : 87 basic_ios<_CharT, _Traits>(), _M_gcount(0) { 88 this->init(__buf); 89 } ~basic_istream()90 ~basic_istream() {}; 91 92 public: // Nested sentry class. 93 94 public: // Hooks for manipulators. The arguments are 95 // function pointers. 96 _Self& operator>> (__istream_fn __f) { return __f(*this); } 97 _Self& operator>> (__ios_fn __f) { __f(*this); return *this; } 98 _Self& operator>> (__ios_base_fn __f) { __f(*this); return *this; } 99 100 public: // Formatted input of numbers. 101 _Self& operator>> (short& __val); 102 _Self& operator>> (int& __val); 103 _Self& operator>> (unsigned short& __val); 104 _Self& operator>> (unsigned int& __val); 105 _Self& operator>> (long& __val); 106 _Self& operator>> (unsigned long& __val); 107 #ifdef _STLP_LONG_LONG 108 _Self& operator>> (_STLP_LONG_LONG& __val); 109 _Self& operator>> (unsigned _STLP_LONG_LONG& __val); 110 #endif 111 _Self& operator>> (float& __val); 112 _Self& operator>> (double& __val); 113 # ifndef _STLP_NO_LONG_DOUBLE 114 _Self& operator>> (long double& __val); 115 # endif 116 # ifndef _STLP_NO_BOOL 117 _Self& operator>> (bool& __val); 118 # endif 119 _Self& operator>> (void*& __val); 120 121 public: // Copying characters into a streambuf. 122 _Self& operator>>(basic_streambuf<_CharT, _Traits>*); 123 124 public: // Unformatted input. gcount()125 streamsize gcount() const { return _M_gcount; } 126 int_type peek(); 127 128 public: // get() for single characters 129 int_type get(); 130 _Self& get(char_type& __c); 131 132 public: // get() for character arrays. 133 _Self& get(char_type* __s, streamsize __n, char_type __delim); get(char_type * __s,streamsize __n)134 _Self& get(char_type* __s, streamsize __n) 135 { return get(__s, __n, this->widen('\n')); } 136 137 public: // get() for streambufs 138 _Self& get(basic_streambuf<_CharT, _Traits>& __buf, 139 char_type __delim); get(basic_streambuf<_CharT,_Traits> & __buf)140 _Self& get(basic_streambuf<_CharT, _Traits>& __buf) 141 { return get(__buf, this->widen('\n')); } 142 143 public: // getline() 144 _Self& getline(char_type* __s, streamsize __n, char_type delim); getline(char_type * __s,streamsize __n)145 _Self& getline(char_type* __s, streamsize __n) 146 { return getline(__s, __n, this->widen('\n')); } 147 148 public: // read(), readsome(), ignore() 149 _Self& ignore(); 150 _Self& ignore(streamsize __n); 151 _Self& ignore(streamsize __n, int_type __delim); 152 153 _Self& read(char_type* __s, streamsize __n); 154 streamsize readsome(char_type* __s, streamsize __n); 155 156 public: // putback 157 _Self& putback(char_type __c); 158 _Self& unget(); 159 160 public: // Positioning and buffer control. 161 int sync(); 162 163 pos_type tellg(); 164 _Self& seekg(pos_type __pos); 165 _Self& seekg(off_type, ios_base::seekdir); 166 167 public: // Helper functions for non-member extractors. 168 void _M_formatted_get(_CharT& __c); 169 void _M_formatted_get(_CharT* __s); 170 void _M_skip_whitespace(bool __set_failbit); 171 172 private: // Number of characters extracted by the 173 streamsize _M_gcount; // most recent unformatted input function. 174 175 public: 176 177 #if defined (_STLP_USE_TEMPLATE_EXPORT) 178 // If we are using DLL specs, we have not to use inner classes 179 // end class declaration here 180 typedef _Isentry<_CharT, _Traits> sentry; 181 }; 182 # define sentry _Isentry 183 template <class _CharT, class _Traits> 184 class _Isentry { 185 typedef _Isentry<_CharT, _Traits> _Self; 186 # else 187 class sentry { 188 typedef sentry _Self; 189 #endif 190 191 private: 192 const bool _M_ok; 193 // basic_streambuf<_CharT, _Traits>* _M_buf; 194 195 public: 196 typedef _Traits traits_type; 197 198 explicit sentry(basic_istream<_CharT, _Traits>& __istr, 199 bool __noskipws = false) : 200 _M_ok((__noskipws || !(__istr.flags() & ios_base::skipws)) ? _M_init_noskip(__istr) : _M_init_skip(__istr) ) 201 /* , _M_buf(__istr.rdbuf()) */ 202 {} 203 204 // Calling this constructor is the same as calling the previous one with 205 // __noskipws = true, except that it doesn't require a runtime test. sentry(basic_istream<_CharT,_Traits> & __istr,_No_Skip_WS)206 sentry(basic_istream<_CharT, _Traits>& __istr, _No_Skip_WS) : /* _M_buf(__istr.rdbuf()), */ 207 _M_ok(_M_init_noskip(__istr)) {} 208 ~sentry()209 ~sentry() {} 210 211 operator bool() const { return _M_ok; } 212 213 private: // Disable assignment and copy constructor. 214 //Implementation is here only to avoid warning with some compilers. sentry(const _Self &)215 sentry(const _Self&) : _M_ok(false) {} 216 _Self& operator=(const _Self&) { return *this; } 217 }; 218 219 # if defined (_STLP_USE_TEMPLATE_EXPORT) 220 # undef sentry 221 # else 222 // close basic_istream class definition here 223 }; 224 # endif 225 226 # if defined (_STLP_USE_TEMPLATE_EXPORT) 227 _STLP_EXPORT_TEMPLATE_CLASS _Isentry<char, char_traits<char> >; 228 _STLP_EXPORT_TEMPLATE_CLASS basic_istream<char, char_traits<char> >; 229 # if ! defined (_STLP_NO_WCHAR_T) 230 _STLP_EXPORT_TEMPLATE_CLASS _Isentry<wchar_t, char_traits<wchar_t> >; 231 _STLP_EXPORT_TEMPLATE_CLASS basic_istream<wchar_t, char_traits<wchar_t> >; 232 # endif 233 # endif /* _STLP_USE_TEMPLATE_EXPORT */ 234 235 // Non-member character and string extractor functions. 236 template <class _CharT, class _Traits> 237 inline basic_istream<_CharT, _Traits>& _STLP_CALL 238 operator>>(basic_istream<_CharT, _Traits>& __in_str, _CharT& __c) { 239 __in_str._M_formatted_get(__c); 240 return __in_str; 241 } 242 243 template <class _Traits> 244 inline basic_istream<char, _Traits>& _STLP_CALL 245 operator>>(basic_istream<char, _Traits>& __in_str, unsigned char& __c) { 246 __in_str._M_formatted_get(__REINTERPRET_CAST(char&,__c)); 247 return __in_str; 248 } 249 250 template <class _Traits> 251 inline basic_istream<char, _Traits>& _STLP_CALL 252 operator>>(basic_istream<char, _Traits>& __in_str, signed char& __c) { 253 __in_str._M_formatted_get(__REINTERPRET_CAST(char&,__c)); 254 return __in_str; 255 } 256 257 template <class _CharT, class _Traits> 258 inline basic_istream<_CharT, _Traits>& _STLP_CALL 259 operator>>(basic_istream<_CharT, _Traits>& __in_str, _CharT* __s) { 260 __in_str._M_formatted_get(__s); 261 return __in_str; 262 } 263 264 template <class _Traits> 265 inline basic_istream<char, _Traits>& _STLP_CALL 266 operator>>(basic_istream<char, _Traits>& __in_str, unsigned char* __s) { 267 __in_str._M_formatted_get(__REINTERPRET_CAST(char*,__s)); 268 return __in_str; 269 } 270 271 template <class _Traits> 272 inline basic_istream<char, _Traits>& _STLP_CALL 273 operator>>(basic_istream<char, _Traits>& __in_str, signed char* __s) { 274 __in_str._M_formatted_get(__REINTERPRET_CAST(char*,__s)); 275 return __in_str; 276 } 277 278 //---------------------------------------------------------------------- 279 // istream manipulator. 280 template <class _CharT, class _Traits> 281 basic_istream<_CharT, _Traits>& _STLP_CALL 282 ws(basic_istream<_CharT, _Traits>& __istr) { 283 if (!__istr.eof()) { 284 typedef typename basic_istream<_CharT, _Traits>::sentry _Sentry; 285 _Sentry __sentry(__istr, _No_Skip_WS()); // Don't skip whitespace. 286 if (__sentry) 287 __istr._M_skip_whitespace(false); 288 } 289 return __istr; 290 } 291 292 // Helper functions for istream<>::sentry constructor. 293 template <class _CharT, class _Traits> 294 inline bool _M_init_skip(basic_istream<_CharT, _Traits>& __istr) { 295 if (__istr.good()) { 296 if (__istr.tie()) 297 __istr.tie()->flush(); 298 299 __istr._M_skip_whitespace(true); 300 } 301 302 if (!__istr.good()) { 303 __istr.setstate(ios_base::failbit); 304 return false; 305 } else 306 return true; 307 } 308 309 template <class _CharT, class _Traits> 310 inline bool _M_init_noskip(basic_istream<_CharT, _Traits>& __istr) { 311 if (__istr.good()) { 312 if (__istr.tie()) 313 __istr.tie()->flush(); 314 315 if (!__istr.rdbuf()) 316 __istr.setstate(ios_base::badbit); 317 } 318 else 319 __istr.setstate(ios_base::failbit); 320 return __istr.good(); 321 } 322 323 //---------------------------------------------------------------------- 324 // Class iostream. 325 template <class _CharT, class _Traits> 326 class basic_iostream 327 : public basic_istream<_CharT, _Traits>, 328 public basic_ostream<_CharT, _Traits> 329 { 330 public: 331 typedef basic_ios<_CharT, _Traits> _Basic_ios; 332 333 explicit basic_iostream(basic_streambuf<_CharT, _Traits>* __buf); 334 virtual ~basic_iostream(); 335 }; 336 337 # if defined (_STLP_USE_TEMPLATE_EXPORT) 338 _STLP_EXPORT_TEMPLATE_CLASS basic_iostream<char, char_traits<char> >; 339 340 # if ! defined (_STLP_NO_WCHAR_T) 341 _STLP_EXPORT_TEMPLATE_CLASS basic_iostream<wchar_t, char_traits<wchar_t> >; 342 # endif 343 # endif /* _STLP_USE_TEMPLATE_EXPORT */ 344 345 template <class _CharT, class _Traits> 346 basic_streambuf<_CharT, _Traits>* _STLP_CALL _M_get_istreambuf(basic_istream<_CharT, _Traits>& __istr) 347 { return __istr.rdbuf(); } 348 349 _STLP_END_NAMESPACE 350 351 #if defined (_STLP_EXPOSE_STREAM_IMPLEMENTATION) && !defined (_STLP_LINK_TIME_INSTANTIATION) 352 # include <stl/_istream.c> 353 #endif 354 355 #endif /* _STLP_INTERNAL_ISTREAM */ 356 357 // Local Variables: 358 // mode:C++ 359 // End: 360