1 // Iostreams base classes -*- C++ -*-
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.
31 // ISO C++ 14882: 27.8 File-based streams
35 * This is an internal header file, included by other library headers.
36 * You should not attempt to use it directly.
39 #ifndef _CPP_BITS_IOSBASE_H
40 #define _CPP_BITS_IOSBASE_H 1
42 #pragma GCC system_header
46 // The following definitions of bitmask types are enums, not ints,
47 // as permitted (but not required) in the standard, in order to provide
48 // better type safety in iostream calls. A side effect is that
49 // expressions involving them are no longer compile-time constants.
50 enum _Ios_Fmtflags { _M_ios_fmtflags_end = 1L << 16 };
53 operator&(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
54 { return _Ios_Fmtflags(static_cast<int>(__a) & static_cast<int>(__b)); }
57 operator|(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
58 { return _Ios_Fmtflags(static_cast<int>(__a) | static_cast<int>(__b)); }
61 operator^(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
62 { return _Ios_Fmtflags(static_cast<int>(__a) ^ static_cast<int>(__b)); }
65 operator|=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
66 { return __a = __a | __b; }
69 operator&=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
70 { return __a = __a & __b; }
73 operator^=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
74 { return __a = __a ^ __b; }
77 operator~(_Ios_Fmtflags __a)
78 { return _Ios_Fmtflags(~static_cast<int>(__a)); }
81 enum _Ios_Openmode { _M_ios_openmode_end = 1L << 16 };
84 operator&(_Ios_Openmode __a, _Ios_Openmode __b)
85 { return _Ios_Openmode(static_cast<int>(__a) & static_cast<int>(__b)); }
88 operator|(_Ios_Openmode __a, _Ios_Openmode __b)
89 { return _Ios_Openmode(static_cast<int>(__a) | static_cast<int>(__b)); }
92 operator^(_Ios_Openmode __a, _Ios_Openmode __b)
93 { return _Ios_Openmode(static_cast<int>(__a) ^ static_cast<int>(__b)); }
96 operator|=(_Ios_Openmode& __a, _Ios_Openmode __b)
97 { return __a = __a | __b; }
100 operator&=(_Ios_Openmode& __a, _Ios_Openmode __b)
101 { return __a = __a & __b; }
104 operator^=(_Ios_Openmode& __a, _Ios_Openmode __b)
105 { return __a = __a ^ __b; }
108 operator~(_Ios_Openmode __a)
109 { return _Ios_Openmode(~static_cast<int>(__a)); }
112 enum _Ios_Iostate { _M_ios_iostate_end = 1L << 16 };
115 operator&(_Ios_Iostate __a, _Ios_Iostate __b)
116 { return _Ios_Iostate(static_cast<int>(__a) & static_cast<int>(__b)); }
119 operator|(_Ios_Iostate __a, _Ios_Iostate __b)
120 { return _Ios_Iostate(static_cast<int>(__a) | static_cast<int>(__b)); }
123 operator^(_Ios_Iostate __a, _Ios_Iostate __b)
124 { return _Ios_Iostate(static_cast<int>(__a) ^ static_cast<int>(__b)); }
127 operator|=(_Ios_Iostate& __a, _Ios_Iostate __b)
128 { return __a = __a | __b; }
131 operator&=(_Ios_Iostate& __a, _Ios_Iostate __b)
132 { return __a = __a & __b; }
135 operator^=(_Ios_Iostate& __a, _Ios_Iostate __b)
136 { return __a = __a ^ __b; }
139 operator~(_Ios_Iostate __a)
140 { return _Ios_Iostate(~static_cast<int>(__a)); }
142 enum _Ios_Seekdir { _M_ios_seekdir_end = 1L << 16 };
144 // 27.4.2 Class ios_base
149 // 27.4.2.1.1 Class ios_base::failure
150 class failure : public exception
153 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
154 //48. Use of non-existent exception constructor
156 failure(const string& __str) throw();
162 what() const throw();
165 enum { _M_bufsize = 256 };
166 char _M_name[_M_bufsize];
170 // 27.4.2.1.2 Type ios_base::fmtflags
171 typedef _Ios_Fmtflags fmtflags;
172 // 27.4.2.1.2 Type fmtflags
173 static const fmtflags boolalpha = fmtflags(__ios_flags::_S_boolalpha);
174 static const fmtflags dec = fmtflags(__ios_flags::_S_dec);
175 static const fmtflags fixed = fmtflags(__ios_flags::_S_fixed);
176 static const fmtflags hex = fmtflags(__ios_flags::_S_hex);
177 static const fmtflags internal = fmtflags(__ios_flags::_S_internal);
178 static const fmtflags left = fmtflags(__ios_flags::_S_left);
179 static const fmtflags oct = fmtflags(__ios_flags::_S_oct);
180 static const fmtflags right = fmtflags(__ios_flags::_S_right);
181 static const fmtflags scientific = fmtflags(__ios_flags::_S_scientific);
182 static const fmtflags showbase = fmtflags(__ios_flags::_S_showbase);
183 static const fmtflags showpoint = fmtflags(__ios_flags::_S_showpoint);
184 static const fmtflags showpos = fmtflags(__ios_flags::_S_showpos);
185 static const fmtflags skipws = fmtflags(__ios_flags::_S_skipws);
186 static const fmtflags unitbuf = fmtflags(__ios_flags::_S_unitbuf);
187 static const fmtflags uppercase = fmtflags(__ios_flags::_S_uppercase);
188 static const fmtflags adjustfield = fmtflags(__ios_flags::_S_adjustfield);
189 static const fmtflags basefield = fmtflags(__ios_flags::_S_basefield);
190 static const fmtflags floatfield = fmtflags(__ios_flags::_S_floatfield);
192 // 27.4.2.1.3 Type ios_base::iostate
193 typedef _Ios_Iostate iostate;
194 static const iostate badbit = iostate(__ios_flags::_S_badbit);
195 static const iostate eofbit = iostate(__ios_flags::_S_eofbit);
196 static const iostate failbit = iostate(__ios_flags::_S_failbit);
197 static const iostate goodbit = iostate(0);
199 // 27.4.2.1.4 Type openmode
200 typedef _Ios_Openmode openmode;
201 static const openmode app = openmode(__ios_flags::_S_app);
202 static const openmode ate = openmode(__ios_flags::_S_ate);
203 static const openmode binary = openmode(__ios_flags::_S_bin);
204 static const openmode in = openmode(__ios_flags::_S_in);
205 static const openmode out = openmode(__ios_flags::_S_out);
206 static const openmode trunc = openmode(__ios_flags::_S_trunc);
208 // 27.4.2.1.5 Type seekdir
209 typedef _Ios_Seekdir seekdir;
210 static const seekdir beg = seekdir(0);
211 static const seekdir cur = seekdir(SEEK_CUR);
212 static const seekdir end = seekdir(SEEK_END);
214 #ifdef _GLIBCPP_DEPRECATED
215 typedef int io_state;
216 typedef int open_mode;
217 typedef int seek_dir;
228 typedef void (*event_callback) (event, ios_base&, int);
231 register_callback(event_callback __fn, int __index);
235 streamsize _M_precision;
239 // 27.4.2.6 Members for callbacks
240 // 27.4.2.6 ios_base callbacks
241 struct _Callback_list
244 _Callback_list* _M_next;
245 ios_base::event_callback _M_fn;
247 int _M_refcount; // 0 means one reference.
249 _Callback_list(ios_base::event_callback __fn, int __index,
250 _Callback_list* __cb)
251 : _M_next(__cb), _M_fn(__fn), _M_index(__index), _M_refcount(0) { }
254 _M_add_reference() { ++_M_refcount; } // XXX MT
257 _M_remove_reference() { return _M_refcount--; } // 0 => OK to delete
260 _Callback_list* _M_callbacks;
263 _M_call_callbacks(event __ev) throw();
266 _M_dispose_callbacks(void);
268 // 27.4.2.5 Members for iword/pword storage
275 static const int _S_local_words = 8;
276 _Words _M_word_array[_S_local_words]; // Guaranteed storage
277 _Words _M_dummy; // Only for failed iword/pword calls.
282 _M_grow_words(int __index);
284 // Members for locale and locale caching.
285 locale _M_ios_locale;
292 // 27.4.2.1.6 Class ios_base::Init
293 // Used to initialize standard streams. In theory, g++ could use
294 // -finit-priority to order this stuff correctly without going
295 // through these machinations.
298 friend class ios_base;
304 _S_ios_create(bool __sync);
310 static int _S_ios_base_init;
311 static bool _S_synced_with_stdio;
316 flags() const { return _M_flags; }
319 flags(fmtflags __fmtfl)
321 fmtflags __old = _M_flags;
327 setf(fmtflags __fmtfl)
329 fmtflags __old = _M_flags;
335 setf(fmtflags __fmtfl, fmtflags __mask)
337 fmtflags __old = _M_flags;
339 _M_flags |= (__fmtfl & __mask);
344 unsetf(fmtflags __mask) { _M_flags &= ~__mask; }
347 precision() const { return _M_precision; }
350 precision(streamsize __prec)
352 streamsize __old = _M_precision;
353 _M_precision = __prec;
358 width() const { return _M_width; }
361 width(streamsize __wide)
363 streamsize __old = _M_width;
369 sync_with_stdio(bool __sync = true);
373 imbue(const locale& __loc);
376 getloc() const { return _M_ios_locale; }
385 _Words& __word = (__ix < _M_word_limit)
386 ? _M_words[__ix] : _M_grow_words(__ix);
387 return __word._M_iword;
393 _Words& __word = (__ix < _M_word_limit)
394 ? _M_words[__ix] : _M_grow_words(__ix);
395 return __word._M_pword;
404 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
405 //50. Copy constructor and assignment operator of ios_base
407 ios_base(const ios_base&);
410 operator=(const ios_base&);
414 // 27.4.5.1 fmtflags manipulators:
416 boolalpha(ios_base& __base)
418 __base.setf(ios_base::boolalpha);
423 noboolalpha(ios_base& __base)
425 __base.unsetf(ios_base::boolalpha);
430 showbase(ios_base& __base)
432 __base.setf(ios_base::showbase);
437 noshowbase(ios_base& __base)
439 __base.unsetf(ios_base::showbase);
444 showpoint(ios_base& __base)
446 __base.setf(ios_base::showpoint);
451 noshowpoint(ios_base& __base)
453 __base.unsetf(ios_base::showpoint);
458 showpos(ios_base& __base)
460 __base.setf(ios_base::showpos);
465 noshowpos(ios_base& __base)
467 __base.unsetf(ios_base::showpos);
472 skipws(ios_base& __base)
474 __base.setf(ios_base::skipws);
479 noskipws(ios_base& __base)
481 __base.unsetf(ios_base::skipws);
486 uppercase(ios_base& __base)
488 __base.setf(ios_base::uppercase);
493 nouppercase(ios_base& __base)
495 __base.unsetf(ios_base::uppercase);
500 unitbuf(ios_base& __base)
502 __base.setf(ios_base::unitbuf);
507 nounitbuf(ios_base& __base)
509 __base.unsetf(ios_base::unitbuf);
513 // 27.4.5.2 adjustfield anipulators:
515 internal(ios_base& __base)
517 __base.setf(ios_base::internal, ios_base::adjustfield);
522 left(ios_base& __base)
524 __base.setf(ios_base::left, ios_base::adjustfield);
529 right(ios_base& __base)
531 __base.setf(ios_base::right, ios_base::adjustfield);
535 // 27.4.5.3 basefield anipulators:
537 dec(ios_base& __base)
539 __base.setf(ios_base::dec, ios_base::basefield);
544 hex(ios_base& __base)
546 __base.setf(ios_base::hex, ios_base::basefield);
551 oct(ios_base& __base)
553 __base.setf(ios_base::oct, ios_base::basefield);
557 // 27.4.5.4 floatfield anipulators:
559 fixed(ios_base& __base)
561 __base.setf(ios_base::fixed, ios_base::floatfield);
566 scientific(ios_base& __base)
568 __base.setf(ios_base::scientific, ios_base::floatfield);
574 #endif /* _CPP_BITS_IOSBASE_H */