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_IOS_BASE_H 19 #define _STLP_IOS_BASE_H 20 21 #ifndef _STLP_INTERNAL_STDEXCEPT_BASE 22 # include <stl/_stdexcept_base.h> 23 #endif 24 25 #ifndef _STLP_INTERNAL_PAIR_H 26 # include <stl/_pair.h> 27 #endif 28 29 #ifndef _STLP_INTERNAL_LOCALE_H 30 # include <stl/_locale.h> 31 #endif 32 33 #ifndef _STLP_INTERNAL_STRING_H 34 # include <stl/_string.h> 35 #endif 36 37 _STLP_BEGIN_NAMESPACE 38 39 // ---------------------------------------------------------------------- 40 41 // Class ios_base. This is the base class of the ios hierarchy, which 42 // includes basic_istream and basic_ostream. Classes in the ios 43 // hierarchy are actually quite simple: they are just glorified 44 // wrapper classes. They delegate buffering and physical character 45 // manipulation to the streambuf classes, and they delegate most 46 // formatting tasks to a locale. 47 48 class _STLP_CLASS_DECLSPEC ios_base { 49 public: 50 51 class _STLP_CLASS_DECLSPEC failure : public __Named_exception { 52 public: 53 explicit failure(const string&); 54 virtual ~failure() _STLP_NOTHROW_INHERENTLY; 55 }; 56 57 typedef int fmtflags; 58 typedef int iostate; 59 typedef int openmode; 60 typedef int seekdir; 61 62 # ifndef _STLP_NO_ANACHRONISMS 63 typedef fmtflags fmt_flags; 64 # endif 65 66 // Formatting flags. 67 _STLP_STATIC_CONSTANT(int, left = 0x0001); 68 _STLP_STATIC_CONSTANT(int, right = 0x0002); 69 _STLP_STATIC_CONSTANT(int, internal = 0x0004); 70 _STLP_STATIC_CONSTANT(int, dec = 0x0008); 71 _STLP_STATIC_CONSTANT(int, hex = 0x0010); 72 _STLP_STATIC_CONSTANT(int, oct = 0x0020); 73 _STLP_STATIC_CONSTANT(int, fixed = 0x0040); 74 _STLP_STATIC_CONSTANT(int, scientific = 0x0080); 75 _STLP_STATIC_CONSTANT(int, boolalpha = 0x0100); 76 _STLP_STATIC_CONSTANT(int, showbase = 0x0200); 77 _STLP_STATIC_CONSTANT(int, showpoint = 0x0400); 78 _STLP_STATIC_CONSTANT(int, showpos = 0x0800); 79 _STLP_STATIC_CONSTANT(int, skipws = 0x1000); 80 _STLP_STATIC_CONSTANT(int, unitbuf = 0x2000); 81 _STLP_STATIC_CONSTANT(int, uppercase = 0x4000); 82 _STLP_STATIC_CONSTANT(int, adjustfield = left | right | internal); 83 _STLP_STATIC_CONSTANT(int, basefield = dec | hex | oct); 84 _STLP_STATIC_CONSTANT(int, floatfield = scientific | fixed); 85 86 // State flags. 87 _STLP_STATIC_CONSTANT(int, goodbit = 0x00); 88 _STLP_STATIC_CONSTANT(int, badbit = 0x01); 89 _STLP_STATIC_CONSTANT(int, eofbit = 0x02); 90 _STLP_STATIC_CONSTANT(int, failbit = 0x04); 91 92 // Openmode flags. 93 _STLP_STATIC_CONSTANT(int, __default_mode = 0x0); /* implementation detail */ 94 _STLP_STATIC_CONSTANT(int, app = 0x01); 95 _STLP_STATIC_CONSTANT(int, ate = 0x02); 96 _STLP_STATIC_CONSTANT(int, binary = 0x04); 97 _STLP_STATIC_CONSTANT(int, in = 0x08); 98 _STLP_STATIC_CONSTANT(int, out = 0x10); 99 _STLP_STATIC_CONSTANT(int, trunc = 0x20); 100 101 // Seekdir flags 102 _STLP_STATIC_CONSTANT(int, beg = 0x01); 103 _STLP_STATIC_CONSTANT(int, cur = 0x02); 104 _STLP_STATIC_CONSTANT(int, end = 0x04); 105 106 public: // Flag-manipulation functions. 107 fmtflags flags() const { return _M_fmtflags; } 108 fmtflags flags(fmtflags __flags) { 109 fmtflags __tmp = _M_fmtflags; 110 _M_fmtflags = __flags; 111 return __tmp; 112 } 113 114 fmtflags setf(fmtflags __flag) { 115 fmtflags __tmp = _M_fmtflags; 116 _M_fmtflags |= __flag; 117 return __tmp; 118 } 119 fmtflags setf(fmtflags __flag, fmtflags __mask) { 120 fmtflags __tmp = _M_fmtflags; 121 _M_fmtflags &= ~__mask; 122 _M_fmtflags |= __flag & __mask; 123 return __tmp; 124 } 125 void unsetf(fmtflags __mask) { _M_fmtflags &= ~__mask; } 126 127 streamsize precision() const { return _M_precision; } 128 streamsize precision(streamsize __newprecision) { 129 streamsize __tmp = _M_precision; 130 _M_precision = __newprecision; 131 return __tmp; 132 } 133 134 streamsize width() const { return _M_width; } 135 streamsize width(streamsize __newwidth) { 136 streamsize __tmp = _M_width; 137 _M_width = __newwidth; 138 return __tmp; 139 } 140 141 public: // Locales 142 locale imbue(const locale&); 143 locale getloc() const { return _M_locale; } 144 145 public: // Auxiliary storage. 146 static int _STLP_CALL xalloc(); 147 long& iword(int __index); 148 void*& pword(int __index); 149 150 public: // Destructor. 151 virtual ~ios_base(); 152 153 public: // Callbacks. 154 enum event { erase_event, imbue_event, copyfmt_event }; 155 typedef void (*event_callback)(event, ios_base&, int __index); 156 void register_callback(event_callback __fn, int __index); 157 158 public: // This member function affects only 159 // the eight predefined ios objects: 160 // cin, cout, etc. 161 static bool _STLP_CALL sync_with_stdio(bool __sync = true); 162 163 public: // The C++ standard requires only that these 164 // member functions be defined in basic_ios. 165 // We define them in the non-template 166 // base class to avoid code duplication. 167 operator void*() const { return !fail() ? (void*) __CONST_CAST(ios_base*,this) : (void*) 0; } 168 bool operator!() const { return fail(); } 169 170 iostate rdstate() const { return _M_iostate; } 171 172 bool good() const { return _M_iostate == 0; } 173 bool eof() const { return (_M_iostate & eofbit) != 0; } 174 bool fail() const { return (_M_iostate & (failbit | badbit)) != 0; } 175 bool bad() const { return (_M_iostate & badbit) != 0; } 176 177 protected: // The functional protected interface. 178 179 // Copies the state of __x to *this. This member function makes it 180 // possible to implement basic_ios::copyfmt without having to expose 181 // ios_base's private data members. Does not copy _M_exception_mask 182 // or _M_iostate. 183 void _M_copy_state(const ios_base& __x); 184 185 void _M_setstate_nothrow(iostate __state) { _M_iostate |= __state; } 186 void _M_clear_nothrow(iostate __state) { _M_iostate = __state; } 187 iostate _M_get_exception_mask() const { return _M_exception_mask; } 188 void _M_set_exception_mask(iostate __mask) { _M_exception_mask = __mask; } 189 void _M_check_exception_mask() { 190 if (_M_iostate & _M_exception_mask) 191 _M_throw_failure(); 192 } 193 194 void _M_invoke_callbacks(event); 195 void _STLP_FUNCTION_THROWS _M_throw_failure(); 196 197 ios_base(); // Default constructor. 198 199 protected: // Initialization of the I/O system 200 static void _STLP_CALL _S_initialize(); 201 static void _STLP_CALL _S_uninitialize(); 202 static bool _S_is_synced; 203 204 private: // Invalidate the copy constructor and 205 // assignment operator. 206 ios_base(const ios_base&); 207 void operator=(const ios_base&); 208 209 private: // Data members. 210 211 fmtflags _M_fmtflags; // Flags 212 iostate _M_iostate; 213 openmode _M_openmode; 214 seekdir _M_seekdir; 215 iostate _M_exception_mask; 216 217 streamsize _M_precision; 218 streamsize _M_width; 219 220 locale _M_locale; 221 222 pair<event_callback, int>* _M_callbacks; 223 size_t _M_num_callbacks; // Size of the callback array. 224 size_t _M_callback_index; // Index of the next available callback; 225 // initially zero. 226 227 long* _M_iwords; // Auxiliary storage. The count is zero 228 size_t _M_num_iwords; // if and only if the pointer is null. 229 230 void** _M_pwords; 231 size_t _M_num_pwords; 232 233 public: 234 // ---------------------------------------------------------------------- 235 // Nested initializer class. This is an implementation detail, but it's 236 // prescribed by the standard. The static initializer object (on 237 // implementations where such a thing is required) is declared in 238 // <iostream> 239 class _STLP_CLASS_DECLSPEC Init 240 { 241 public: 242 Init(); 243 ~Init(); 244 private: 245 static long _S_count; 246 friend class ios_base; 247 }; 248 249 friend class Init; 250 251 public: 252 # ifndef _STLP_NO_ANACHRONISMS 253 // 31.6 Old iostreams members [depr.ios.members] 254 typedef iostate io_state; 255 typedef openmode open_mode; 256 typedef seekdir seek_dir; 257 typedef _STLP_STD::streamoff streamoff; 258 typedef _STLP_STD::streampos streampos; 259 # endif 260 }; 261 262 // ---------------------------------------------------------------------- 263 // ios_base manipulator functions, from section 27.4.5 of the C++ standard. 264 // All of them are trivial one-line wrapper functions. 265 266 // fmtflag manipulators, section 27.4.5.1 267 inline ios_base& _STLP_CALL boolalpha(ios_base& __s) 268 { __s.setf(ios_base::boolalpha); return __s;} 269 270 inline ios_base& _STLP_CALL noboolalpha(ios_base& __s) 271 { __s.unsetf(ios_base::boolalpha); return __s;} 272 273 inline ios_base& _STLP_CALL showbase(ios_base& __s) 274 { __s.setf(ios_base::showbase); return __s;} 275 276 inline ios_base& _STLP_CALL noshowbase(ios_base& __s) 277 { __s.unsetf(ios_base::showbase); return __s;} 278 279 inline ios_base& _STLP_CALL showpoint(ios_base& __s) 280 { __s.setf(ios_base::showpoint); return __s;} 281 282 inline ios_base& _STLP_CALL noshowpoint(ios_base& __s) 283 { __s.unsetf(ios_base::showpoint); return __s;} 284 285 inline ios_base& _STLP_CALL showpos(ios_base& __s) 286 { __s.setf(ios_base::showpos); return __s;} 287 288 inline ios_base& _STLP_CALL noshowpos(ios_base& __s) 289 { __s.unsetf(ios_base::showpos); return __s;} 290 291 inline ios_base& _STLP_CALL skipws(ios_base& __s) 292 { __s.setf(ios_base::skipws); return __s;} 293 294 inline ios_base& _STLP_CALL noskipws(ios_base& __s) 295 { __s.unsetf(ios_base::skipws); return __s;} 296 297 inline ios_base& _STLP_CALL uppercase(ios_base& __s) 298 { __s.setf(ios_base::uppercase); return __s;} 299 300 inline ios_base& _STLP_CALL nouppercase(ios_base& __s) 301 { __s.unsetf(ios_base::uppercase); return __s;} 302 303 inline ios_base& _STLP_CALL unitbuf(ios_base& __s) 304 { __s.setf(ios_base::unitbuf); return __s;} 305 306 inline ios_base& _STLP_CALL nounitbuf(ios_base& __s) 307 { __s.unsetf(ios_base::unitbuf); return __s;} 308 309 310 // adjustfield manipulators, section 27.4.5.2 311 inline ios_base& _STLP_CALL internal(ios_base& __s) 312 { __s.setf(ios_base::internal, ios_base::adjustfield); return __s; } 313 314 inline ios_base& _STLP_CALL left(ios_base& __s) 315 { __s.setf(ios_base::left, ios_base::adjustfield); return __s; } 316 317 inline ios_base& _STLP_CALL right(ios_base& __s) 318 { __s.setf(ios_base::right, ios_base::adjustfield); return __s; } 319 320 // basefield manipulators, section 27.4.5.3 321 inline ios_base& _STLP_CALL dec(ios_base& __s) 322 { __s.setf(ios_base::dec, ios_base::basefield); return __s; } 323 324 inline ios_base& _STLP_CALL hex(ios_base& __s) 325 { __s.setf(ios_base::hex, ios_base::basefield); return __s; } 326 327 inline ios_base& _STLP_CALL oct(ios_base& __s) 328 { __s.setf(ios_base::oct, ios_base::basefield); return __s; } 329 330 331 // floatfield manipulators, section 27.4.5.3 332 inline ios_base& _STLP_CALL fixed(ios_base& __s) 333 { __s.setf(ios_base::fixed, ios_base::floatfield); return __s; } 334 335 inline ios_base& _STLP_CALL scientific(ios_base& __s) 336 { __s.setf(ios_base::scientific, ios_base::floatfield); return __s; } 337 338 _STLP_END_NAMESPACE 339 340 #endif /* _STLP_IOS_BASE */ 341 342 // Local Variables: 343 // mode:C++ 344 // End: 345 346
