1 // Iostreams base classes -*- C++ -*-
3 // Copyright (C) 1997-1999 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
34 #ifndef _CPP_BITS_IOSBASE_H
35 #define _CPP_BITS_IOSBASE_H 1
39 // The following definitions of bitmask types are enums, not ints,
40 // as permitted (but not required) in the standard, in order to provide
41 // better type safety in iostream calls. A side effect is that
42 // expressions involving them are no longer compile-time constants.
43 enum _Ios_Fmtflags { _S_ios_fmtflags_end = 1<<16 };
46 operator&(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
47 { return _Ios_Fmtflags(static_cast<int>(__a) & static_cast<int>(__b)); }
50 operator|(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
51 { return _Ios_Fmtflags(static_cast<int>(__a) | static_cast<int>(__b)); }
54 operator^(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
55 { return _Ios_Fmtflags(static_cast<int>(__a) ^ static_cast<int>(__b)); }
58 operator|=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
59 { return __a = __a | __b; }
62 operator&=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
63 { return __a = __a & __b; }
66 operator^=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
67 { return __a = __a ^ __b; }
70 operator~(_Ios_Fmtflags __a)
71 { return _Ios_Fmtflags(~static_cast<int>(__a)); }
74 enum _Ios_Openmode { _S_ios_openmode_end = 1<<16 };
77 operator&(_Ios_Openmode __a, _Ios_Openmode __b)
78 { return _Ios_Openmode(static_cast<int>(__a) & static_cast<int>(__b)); }
81 operator|(_Ios_Openmode __a, _Ios_Openmode __b)
82 { return _Ios_Openmode(static_cast<int>(__a) | static_cast<int>(__b)); }
85 operator^(_Ios_Openmode __a, _Ios_Openmode __b)
86 { return _Ios_Openmode(static_cast<int>(__a) ^ static_cast<int>(__b)); }
89 operator|=(_Ios_Openmode& __a, _Ios_Openmode __b)
90 { return __a = __a | __b; }
93 operator&=(_Ios_Openmode& __a, _Ios_Openmode __b)
94 { return __a = __a & __b; }
97 operator^=(_Ios_Openmode& __a, _Ios_Openmode __b)
98 { return __a = __a ^ __b; }
101 operator~(_Ios_Openmode __a)
102 { return _Ios_Openmode(~static_cast<int>(__a)); }
105 enum _Ios_Iostate { _S_ios_iostate_end = 1<<16 };
108 operator&(_Ios_Iostate __a, _Ios_Iostate __b)
109 { return _Ios_Iostate(static_cast<int>(__a) & static_cast<int>(__b)); }
112 operator|(_Ios_Iostate __a, _Ios_Iostate __b)
113 { return _Ios_Iostate(static_cast<int>(__a) | static_cast<int>(__b)); }
116 operator^(_Ios_Iostate __a, _Ios_Iostate __b)
117 { return _Ios_Iostate(static_cast<int>(__a) ^ static_cast<int>(__b)); }
120 operator|=(_Ios_Iostate& __a, _Ios_Iostate __b)
121 { return __a = __a | __b; }
124 operator&=(_Ios_Iostate& __a, _Ios_Iostate __b)
125 { return __a = __a & __b; }
128 operator^=(_Ios_Iostate& __a, _Ios_Iostate __b)
129 { return __a = __a ^ __b; }
132 operator~(_Ios_Iostate __a)
133 { return _Ios_Iostate(~static_cast<int>(__a)); }
135 enum _Ios_Seekdir { _S_ios_Seekdir_end = 1<<16 };
137 // 27.4.2 Class ios_base
142 // 27.4.2.1.1 Class ios_base::failure
143 class failure : public exception
146 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
147 // Can't do exception(_msg) as defined in 27.4.2.1.1
149 failure(const string& __str);
155 char* what() const throw() { return _M_name; }
158 enum { _M_bufsize = 256 };
159 char _M_name[_M_bufsize];
163 // 27.4.2.1.2 Type ios_base::fmtflags
164 typedef _Ios_Fmtflags fmtflags;
165 // 27.4.2.1.2 Type fmtflags
166 static const fmtflags boolalpha = fmtflags(__ios_flags::_S_boolalpha);
167 static const fmtflags dec = fmtflags(__ios_flags::_S_dec);
168 static const fmtflags fixed = fmtflags(__ios_flags::_S_fixed);
169 static const fmtflags hex = fmtflags(__ios_flags::_S_hex);
170 static const fmtflags internal = fmtflags(__ios_flags::_S_internal);
171 static const fmtflags left = fmtflags(__ios_flags::_S_left);
172 static const fmtflags oct = fmtflags(__ios_flags::_S_oct);
173 static const fmtflags right = fmtflags(__ios_flags::_S_right);
174 static const fmtflags scientific = fmtflags(__ios_flags::_S_scientific);
175 static const fmtflags showbase = fmtflags(__ios_flags::_S_showbase);
176 static const fmtflags showpoint = fmtflags(__ios_flags::_S_showpoint);
177 static const fmtflags showpos = fmtflags(__ios_flags::_S_showpos);
178 static const fmtflags skipws = fmtflags(__ios_flags::_S_skipws);
179 static const fmtflags unitbuf = fmtflags(__ios_flags::_S_unitbuf);
180 static const fmtflags uppercase = fmtflags(__ios_flags::_S_uppercase);
181 static const fmtflags adjustfield = fmtflags(__ios_flags::_S_adjustfield);
182 static const fmtflags basefield = fmtflags(__ios_flags::_S_basefield);
183 static const fmtflags floatfield = fmtflags(__ios_flags::_S_floatfield);
185 // 27.4.2.1.3 Type ios_base::iostate
186 typedef _Ios_Iostate iostate;
187 static const iostate badbit = iostate(__ios_flags::_S_badbit);
188 static const iostate eofbit = iostate(__ios_flags::_S_eofbit);
189 static const iostate failbit = iostate(__ios_flags::_S_failbit);
190 static const iostate goodbit = iostate(0);
192 // 27.4.2.1.4 Type openmode
193 typedef _Ios_Openmode openmode;
194 static const openmode app = openmode(__ios_flags::_S_app);
195 static const openmode ate = openmode(__ios_flags::_S_ate);
196 static const openmode binary = openmode(__ios_flags::_S_bin);
197 static const openmode in = openmode(__ios_flags::_S_in);
198 static const openmode out = openmode(__ios_flags::_S_out);
199 static const openmode trunc = openmode(__ios_flags::_S_trunc);
201 // 27.4.2.1.5 Type seekdir
202 typedef _Ios_Seekdir seekdir;
203 static const seekdir beg = seekdir(0);
204 static const seekdir cur = seekdir(SEEK_CUR);
205 static const seekdir end = seekdir(SEEK_END);
207 #ifdef _GLIBCPP_DEPRECATED
208 typedef int io_state;
209 typedef int open_mode;
210 typedef int seek_dir;
221 typedef void (*event_callback) (event, ios_base&, int);
224 register_callback(event_callback __fn, int __index);
228 streamsize _M_precision;
232 // 27.4.2.6 Members for callbacks
233 // 27.4.2.6 ios_base callbacks
235 struct _Callback_list
238 _Callback_list* _M_next;
239 ios_base::event_callback _M_fn;
241 int _M_refcount; // 0 means one reference.
243 _Callback_list(ios_base::event_callback __fn, int __index,
244 _Callback_list* __cb)
245 : _M_next(__cb), _M_fn(__fn), _M_index(__index), _M_refcount(0) { }
248 _M_add_reference() { ++_M_refcount; } // XXX MT
251 _M_remove_reference() { return _M_refcount--; } // 0 => OK to delete
254 _Callback_list* _M_callbacks;
257 _M_call_callbacks(event __ev) throw();
260 _M_dispose_callbacks(void);
262 // 27.4.2.5 Members for iword/pword storage
269 static const int _S_local_words = 8;
270 _Words _M_word_array[_S_local_words]; // Guaranteed storage
271 _Words _M_dummy; // Only for failed iword/pword calls.
276 _M_grow_words(int __index);
278 // Members for locale and locale caching.
279 locale _M_ios_locale;
285 // 27.4.2.1.6 Class ios_base::Init
286 // Used to initialize standard streams. In theory, g++ could use
287 // -finit-priority to order this stuff correctly without going
288 // through these machinations.
292 friend class ios_base;
297 static int _S_ios_base_init;
301 #ifdef _GLIBCPP_USE_WCHAR_T
310 flags() const { return _M_flags; }
313 flags(fmtflags __fmtfl)
315 fmtflags __old = _M_flags;
321 setf(fmtflags __fmtfl)
323 fmtflags __old = _M_flags;
329 setf(fmtflags __fmtfl, fmtflags __mask)
331 fmtflags __old = _M_flags;
333 _M_flags |= (__fmtfl & __mask);
338 unsetf(fmtflags __mask) { _M_flags &= ~__mask; }
341 precision() const { return _M_precision; }
344 precision(streamsize __prec)
346 streamsize __old = _M_precision;
347 _M_precision = __prec;
352 width() const { return _M_width; }
355 width(streamsize __wide)
357 streamsize __old = _M_width;
363 sync_with_stdio(bool __sync = true);
367 imbue(const locale& __loc);
370 getloc() const { return _M_ios_locale; }
379 _Words& __word = (__ix < _M_word_limit)
380 ? _M_words[__ix] : _M_grow_words(__ix);
381 return __word._M_iword;
387 _Words& __word = (__ix < _M_word_limit)
388 ? _M_words[__ix] : _M_grow_words(__ix);
389 return __word._M_pword;
398 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
400 ios_base(const ios_base&);
403 operator=(const ios_base&);
407 // 27.4.5.1 fmtflags manipulators:
409 boolalpha(ios_base& __base)
411 __base.setf(ios_base::boolalpha);
416 noboolalpha(ios_base& __base)
418 __base.unsetf(ios_base::boolalpha);
423 showbase(ios_base& __base)
425 __base.setf(ios_base::showbase);
430 noshowbase(ios_base& __base)
432 __base.unsetf(ios_base::showbase);
437 showpoint(ios_base& __base)
439 __base.setf(ios_base::showpoint);
444 noshowpoint(ios_base& __base)
446 __base.unsetf(ios_base::showpoint);
451 showpos(ios_base& __base)
453 __base.setf(ios_base::showpos);
458 noshowpos(ios_base& __base)
460 __base.unsetf(ios_base::showpos);
465 skipws(ios_base& __base)
467 __base.setf(ios_base::skipws);
472 noskipws(ios_base& __base)
474 __base.unsetf(ios_base::skipws);
479 uppercase(ios_base& __base)
481 __base.setf(ios_base::uppercase);
486 nouppercase(ios_base& __base)
488 __base.unsetf(ios_base::uppercase);
493 unitbuf(ios_base& __base)
495 __base.setf(ios_base::unitbuf);
500 nounitbuf(ios_base& __base)
502 __base.unsetf(ios_base::unitbuf);
506 // 27.4.5.2 adjustfield anipulators:
508 internal(ios_base& __base)
510 __base.setf(ios_base::internal, ios_base::adjustfield);
515 left(ios_base& __base)
517 __base.setf(ios_base::left, ios_base::adjustfield);
522 right(ios_base& __base)
524 __base.setf(ios_base::right, ios_base::adjustfield);
528 // 27.4.5.3 basefield anipulators:
530 dec(ios_base& __base)
532 __base.setf(ios_base::dec, ios_base::basefield);
537 hex(ios_base& __base)
539 __base.setf(ios_base::hex, ios_base::basefield);
544 oct(ios_base& __base)
546 __base.setf(ios_base::oct, ios_base::basefield);
550 // 27.4.5.4 floatfield anipulators:
552 fixed(ios_base& __base)
554 __base.setf(ios_base::fixed, ios_base::floatfield);
559 scientific(ios_base& __base)
561 __base.setf(ios_base::scientific, ios_base::floatfield);
567 #endif /* _CPP_BITS_IOSBASE_H */