1 // Iostreams base classes -*- C++ -*-
3 // Copyright (C) 1997, 1998, 1999, 2000 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: 27.4 Iostreams base classes
34 #include <bits/std_ios.h>
35 #include <bits/std_iostream.h>
36 #include <bits/std_fstream.h>
40 // Definitions for static const data members of __ios_flags.
41 const __ios_flags::__int_type __ios_flags::_S_boolalpha;
42 const __ios_flags::__int_type __ios_flags::_S_dec;
43 const __ios_flags::__int_type __ios_flags::_S_fixed;
44 const __ios_flags::__int_type __ios_flags::_S_hex;
45 const __ios_flags::__int_type __ios_flags::_S_internal;
46 const __ios_flags::__int_type __ios_flags::_S_left;
47 const __ios_flags::__int_type __ios_flags::_S_oct;
48 const __ios_flags::__int_type __ios_flags::_S_right;
49 const __ios_flags::__int_type __ios_flags::_S_scientific;
50 const __ios_flags::__int_type __ios_flags::_S_showbase;
51 const __ios_flags::__int_type __ios_flags::_S_showpoint;
52 const __ios_flags::__int_type __ios_flags::_S_showpos;
53 const __ios_flags::__int_type __ios_flags::_S_skipws;
54 const __ios_flags::__int_type __ios_flags::_S_unitbuf;
55 const __ios_flags::__int_type __ios_flags::_S_uppercase;
56 const __ios_flags::__int_type __ios_flags::_S_adjustfield;
57 const __ios_flags::__int_type __ios_flags::_S_basefield;
58 const __ios_flags::__int_type __ios_flags::_S_floatfield;
60 const __ios_flags::__int_type __ios_flags::_S_badbit;
61 const __ios_flags::__int_type __ios_flags::_S_eofbit;
62 const __ios_flags::__int_type __ios_flags::_S_failbit;
64 const __ios_flags::__int_type __ios_flags::_S_app;
65 const __ios_flags::__int_type __ios_flags::_S_ate;
66 const __ios_flags::__int_type __ios_flags::_S_bin;
67 const __ios_flags::__int_type __ios_flags::_S_in;
68 const __ios_flags::__int_type __ios_flags::_S_out;
69 const __ios_flags::__int_type __ios_flags::_S_trunc;
71 // Definitions for static const members of ios_base.
72 const ios_base::fmtflags ios_base::boolalpha;
73 const ios_base::fmtflags ios_base::dec;
74 const ios_base::fmtflags ios_base::fixed;
75 const ios_base::fmtflags ios_base::hex;
76 const ios_base::fmtflags ios_base::internal;
77 const ios_base::fmtflags ios_base::left;
78 const ios_base::fmtflags ios_base::oct;
79 const ios_base::fmtflags ios_base::right;
80 const ios_base::fmtflags ios_base::scientific;
81 const ios_base::fmtflags ios_base::showbase;
82 const ios_base::fmtflags ios_base::showpoint;
83 const ios_base::fmtflags ios_base::showpos;
84 const ios_base::fmtflags ios_base::skipws;
85 const ios_base::fmtflags ios_base::unitbuf;
86 const ios_base::fmtflags ios_base::uppercase;
87 const ios_base::fmtflags ios_base::adjustfield;
88 const ios_base::fmtflags ios_base::basefield;
89 const ios_base::fmtflags ios_base::floatfield;
91 const ios_base::iostate ios_base::badbit;
92 const ios_base::iostate ios_base::eofbit;
93 const ios_base::iostate ios_base::failbit;
94 const ios_base::iostate ios_base::goodbit;
96 const ios_base::openmode ios_base::app;
97 const ios_base::openmode ios_base::ate;
98 const ios_base::openmode ios_base::binary;
99 const ios_base::openmode ios_base::in;
100 const ios_base::openmode ios_base::out;
101 const ios_base::openmode ios_base::trunc;
103 const ios_base::seekdir ios_base::beg;
104 const ios_base::seekdir ios_base::cur;
105 const ios_base::seekdir ios_base::end;
107 int ios_base::Init::_S_ios_base_init = 0;
109 const int ios_base::_S_local_words;
111 ios_base::failure::failure(const string& __str)
113 strncpy(_M_name, __str.c_str(), _M_bufsize);
114 _M_name[_M_bufsize - 1] = '\0';
117 ios_base::failure::~failure()
121 ios_base::failure::what() const throw()
124 ios_base::Init::Init()
126 if (++_S_ios_base_init == 1)
128 // NB: std_iostream.h creates the four standard files with
129 // default buffers. At this point, we swap out the default
130 // buffers for the properly-constructed ones, and dispose of
131 // the default buffers.
133 _M_cout = new filebuf(1, "stdout", ios_base::out);
134 _M_cin = new filebuf(0, "stdin", ios_base::in);
135 _M_cerr = new filebuf(2, "stderr", ios_base::out);
136 __old = cout.rdbuf(_M_cout);
138 __old = cin.rdbuf(_M_cin);
141 __old = cerr.rdbuf(_M_cerr);
143 cerr.flags(ios_base::unitbuf);
144 __old = clog.rdbuf(_M_cerr);
146 #ifdef _GLIBCPP_USE_WCHAR_T
148 _M_wcout = new wfilebuf(1, "stdout", ios_base::out);
149 _M_wcin = new wfilebuf(0, "stdin", ios_base::in);
150 _M_wcerr = new wfilebuf(2, "stderr", ios_base::out);
151 __wold = wcout.rdbuf(_M_wcout);
152 __wold->~wstreambuf();
153 __wold = wcin.rdbuf(_M_wcin);
154 __wold->~wstreambuf();
156 __wold = wcerr.rdbuf(_M_wcerr);
157 __wold->~wstreambuf();
158 wcerr.flags(ios_base::unitbuf);
159 __wold = wclog.rdbuf(_M_wcerr);
160 __wold->~wstreambuf();
165 ios_base::Init::~Init()
167 if (--_S_ios_base_init == 0)
178 #ifdef _GLIBCPP_USE_WCHAR_T
192 // 27.4.2.5 ios_base storage functions
194 ios_base::xalloc() throw()
197 // XXX should be a symbol. (Reserve 0..3 for builtins.)
202 // 27.4.2.5 iword/pword storage
204 ios_base::_M_grow_words(int ix)
206 // Precondition: _M_word_limit <= ix
207 _Words zero = { 0, 0 };
208 int newlimit = _S_local_words;
209 _Words* words = _M_word_array;
211 if (_S_local_words <= ix)
215 { words = new _Words[ix+1]; }
218 _M_dummy = zero; // XXX MT? Not on "normal" machines.
219 // XXX now in basic_ios
220 // _M_clear(_M_rdstate() | badbit); // may throw
223 do { words[i] = _M_words[i]; } while (++i < _M_word_limit);
224 if (_M_words != _M_word_array) delete [] _M_words;
227 do { words[i] = zero; } while (++i < newlimit);
229 _M_word_limit = newlimit;
233 // Called only by basic_ios<>::init.
237 // NB: May be called more than once
238 _M_flags = skipws | dec;
244 _M_ios_locale = locale();
245 // No init needed for _M_word_array or _M_dummy.
248 // 27.4.2.3 ios_base locale functions
250 ios_base::imbue(const locale& __loc)
252 locale __old = _M_ios_locale;
253 _M_ios_locale = __loc;
254 // Make sure there's a callback for the format caches so they will be
256 _Format_cache<char>::_S_get(*this);
257 #ifdef _GLIBCPP_USE_WCHAR_T
258 _Format_cache<wchar_t>::_S_get(*this);
260 _M_call_callbacks(imbue_event);
266 // Do nothing; init() does it. Static init to 0 makes everything sane.
269 // 27.4.2.7 ios_base constructors/destructors
270 ios_base::~ios_base()
272 _M_call_callbacks(erase_event);
273 _M_dispose_callbacks();
274 if (_M_words != _M_word_array)
280 ios_base::register_callback(event_callback __fn, int __index)
281 { _M_callbacks = new _Callback_list(__fn, __index, _M_callbacks); }
284 ios_base::_M_call_callbacks(event __e) throw()
286 for (_Callback_list* __p = _M_callbacks; __p; __p = __p->_M_next)
289 (*__p->_M_fn) (__e, *this, __p->_M_index);
297 ios_base::_M_dispose_callbacks(void)
299 _Callback_list* __p = _M_callbacks;
300 while (__p && __p->_M_remove_reference() == 0)
302 _Callback_list* __next = __p->_M_next;
310 ios_base::sync_with_stdio(bool __sync)
312 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
313 // 49. Underspecification of ios_base::sync_with_stdio
314 bool __ret = __ioinit._M_cin->_M_file->get_fileno() == 0;
316 // Turn off sync with C FILE* for cin, cout, cerr, clog.
317 if (!__sync && __ret)
319 // Need to dispose of the buffers created at initialization.
320 __ioinit._M_cout->~filebuf();
321 __ioinit._M_cin->~filebuf();
322 __ioinit._M_cerr->~filebuf();
323 __ioinit._M_cout = new filebuf();
324 __ioinit._M_cin = new filebuf();
325 __ioinit._M_cerr = new filebuf();
326 __ioinit._M_cout->open("stdout", ios_base::out);
327 __ioinit._M_cin->open("stdin", ios_base::in);
328 __ioinit._M_cerr->open("stderr", ios_base::out);
329 cout.rdbuf(__ioinit._M_cout);
330 cin.rdbuf(__ioinit._M_cin);
331 cerr.rdbuf(__ioinit._M_cerr);
332 cerr.flags(ios_base::unitbuf);
333 clog.rdbuf(__ioinit._M_cerr);
334 #ifdef _GLIBCPP_USE_WCHAR_T
335 __ioinit._M_wcout->~wfilebuf();
336 __ioinit._M_wcin->~wfilebuf();
337 __ioinit._M_wcerr->~wfilebuf();
338 __ioinit._M_wcout = new wfilebuf();
339 __ioinit._M_wcin = new wfilebuf();
340 __ioinit._M_wcerr = new wfilebuf();
341 __ioinit._M_wcout->open("wstdout", ios_base::out);
342 __ioinit._M_wcin->open("wstdin", ios_base::in);
343 __ioinit._M_wcerr->open("wstderr", ios_base::out);
344 wcout.rdbuf(__ioinit._M_wcout);
345 wcin.rdbuf(__ioinit._M_wcin);
346 wcerr.rdbuf(__ioinit._M_wcerr);
347 wcerr.flags(ios_base::unitbuf);
348 wclog.rdbuf(__ioinit._M_wcerr);