// Iostreams base classes -*- C++ -*-
-// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
+// 2006, 2007, 2008, 2009, 2010
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
-// Free Software Foundation; either version 2, or (at your option)
+// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING. If not, write to the Free
-// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
-// USA.
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
-// As a special exception, you may use this file as part of a free software
-// library without restriction. Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License. This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
//
// ISO C++ 14882: 27.4 Iostreams base classes
//
#include <ios>
-#include <ostream>
-#include <istream>
-#include <fstream>
+#include <limits>
-#include <bits/atomicity.h>
-
-namespace std
+namespace std _GLIBCXX_VISIBILITY(default)
{
- // Extern declarations for global objects in src/globals.cc.
- extern istream cin;
- extern ostream cout;
- extern ostream cerr;
- extern ostream clog;
- extern filebuf buf_cout;
- extern filebuf buf_cin;
- extern filebuf buf_cerr;
-
-#ifdef _GLIBCPP_USE_WCHAR_T
- extern wistream wcin;
- extern wostream wcout;
- extern wostream wcerr;
- extern wostream wclog;
- extern wfilebuf buf_wcout;
- extern wfilebuf buf_wcin;
- extern wfilebuf buf_wcerr;
-#endif
-
- // Definitions for static const data members of __ios_flags.
- const __ios_flags::__int_type __ios_flags::_S_boolalpha;
- const __ios_flags::__int_type __ios_flags::_S_dec;
- const __ios_flags::__int_type __ios_flags::_S_fixed;
- const __ios_flags::__int_type __ios_flags::_S_hex;
- const __ios_flags::__int_type __ios_flags::_S_internal;
- const __ios_flags::__int_type __ios_flags::_S_left;
- const __ios_flags::__int_type __ios_flags::_S_oct;
- const __ios_flags::__int_type __ios_flags::_S_right;
- const __ios_flags::__int_type __ios_flags::_S_scientific;
- const __ios_flags::__int_type __ios_flags::_S_showbase;
- const __ios_flags::__int_type __ios_flags::_S_showpoint;
- const __ios_flags::__int_type __ios_flags::_S_showpos;
- const __ios_flags::__int_type __ios_flags::_S_skipws;
- const __ios_flags::__int_type __ios_flags::_S_unitbuf;
- const __ios_flags::__int_type __ios_flags::_S_uppercase;
- const __ios_flags::__int_type __ios_flags::_S_adjustfield;
- const __ios_flags::__int_type __ios_flags::_S_basefield;
- const __ios_flags::__int_type __ios_flags::_S_floatfield;
-
- const __ios_flags::__int_type __ios_flags::_S_badbit;
- const __ios_flags::__int_type __ios_flags::_S_eofbit;
- const __ios_flags::__int_type __ios_flags::_S_failbit;
-
- const __ios_flags::__int_type __ios_flags::_S_app;
- const __ios_flags::__int_type __ios_flags::_S_ate;
- const __ios_flags::__int_type __ios_flags::_S_bin;
- const __ios_flags::__int_type __ios_flags::_S_in;
- const __ios_flags::__int_type __ios_flags::_S_out;
- const __ios_flags::__int_type __ios_flags::_S_trunc;
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
// Definitions for static const members of ios_base.
const ios_base::fmtflags ios_base::boolalpha;
const ios_base::seekdir ios_base::cur;
const ios_base::seekdir ios_base::end;
- const int ios_base::_S_local_words;
- int ios_base::Init::_S_ios_base_init = 0;
- bool ios_base::Init::_S_synced_with_stdio = true;
+ _Atomic_word ios_base::Init::_S_refcount;
- ios_base::failure::failure(const string& __str) throw()
- {
- strncpy(_M_name, __str.c_str(), _M_bufsize);
- _M_name[_M_bufsize - 1] = '\0';
- }
-
- ios_base::failure::~failure() throw()
- { }
-
- const char*
- ios_base::failure::what() const throw()
- { return _M_name; }
-
- void
- ios_base::Init::_S_ios_create(bool __sync)
- {
- int __out_bufsize = __sync ? 0 : static_cast<int>(BUFSIZ);
- int __in_bufsize = __sync ? 1 : static_cast<int>(BUFSIZ);
-
-#if _GLIBCPP_AVOID_FSEEK
- // Platforms that prefer to avoid fseek() calls on streams only
- // get their desire when the C++-layer input buffer size is 1.
- // This hack hurts performance but keeps correctness across
- // all types of streams that might be attached to (e.g.) cin.
- __in_bufsize = 1;
-#endif
-
- // NB: The file globals.cc creates the four standard files
- // with NULL buffers. At this point, we swap out the dummy NULL
- // [io]stream objects and buffers with the real deal.
- new (&buf_cout) filebuf(stdout, ios_base::out, __out_bufsize);
- new (&buf_cin) filebuf(stdin, ios_base::in, __in_bufsize);
- new (&buf_cerr) filebuf(stderr, ios_base::out, __out_bufsize);
- new (&cout) ostream(&buf_cout);
- new (&cin) istream(&buf_cin);
- new (&cerr) ostream(&buf_cerr);
- new (&clog) ostream(&buf_cerr);
- cin.tie(&cout);
- cerr.flags(ios_base::unitbuf);
-
-#ifdef _GLIBCPP_USE_WCHAR_T
- new (&buf_wcout) wfilebuf(stdout, ios_base::out, __out_bufsize);
- new (&buf_wcin) wfilebuf(stdin, ios_base::in, __in_bufsize);
- new (&buf_wcerr) wfilebuf(stderr, ios_base::out, __out_bufsize);
- new (&wcout) wostream(&buf_wcout);
- new (&wcin) wistream(&buf_wcin);
- new (&wcerr) wostream(&buf_wcerr);
- new (&wclog) wostream(&buf_wcerr);
- wcin.tie(&wcout);
- wcerr.flags(ios_base::unitbuf);
-#endif
- }
+ bool ios_base::Init::_S_synced_with_stdio = true;
- void
- ios_base::Init::_S_ios_destroy()
+ ios_base::ios_base() throw()
+ : _M_precision(), _M_width(), _M_flags(), _M_exception(),
+ _M_streambuf_state(), _M_callbacks(0), _M_word_zero(),
+ _M_word_size(_S_local_word_size), _M_word(_M_local_word), _M_ios_locale()
{
- // Explicitly call dtors to free any memory that is dynamically
- // allocated by filebuf ctor or member functions, but don't
- // deallocate all memory by calling operator delete.
- cout.flush();
- cerr.flush();
- clog.flush();
- buf_cout.~filebuf();
- buf_cin.~filebuf();
- buf_cerr.~filebuf();
-#ifdef _GLIBCPP_USE_WCHAR_T
- wcout.flush();
- wcerr.flush();
- wclog.flush();
- buf_wcout.~wfilebuf();
- buf_wcin.~wfilebuf();
- buf_wcerr.~wfilebuf();
-#endif
+ // Do nothing: basic_ios::init() does it.
+ // NB: _M_callbacks and _M_word must be zero for non-initialized
+ // ios_base to go through ~ios_base gracefully.
}
-
- ios_base::Init::Init()
+
+ // 27.4.2.7 ios_base constructors/destructors
+ ios_base::~ios_base()
{
- if (_S_ios_base_init == 0)
+ _M_call_callbacks(erase_event);
+ _M_dispose_callbacks();
+ if (_M_word != _M_local_word)
{
- // Standard streams default to synced with "C" operations.
- ios_base::Init::_S_synced_with_stdio = true;
- _S_ios_create(ios_base::Init::_S_synced_with_stdio);
+ delete [] _M_word;
+ _M_word = 0;
}
- ++_S_ios_base_init;
}
- ios_base::Init::~Init()
- {
- if (--_S_ios_base_init == 0)
- _S_ios_destroy();
- }
-
// 27.4.2.5 ios_base storage functions
int
ios_base::xalloc() throw()
{
- // XXX should be a symbol. (Reserve 0..3 for builtins.)
- static _Atomic_word top = 0;
- return __exchange_and_add(&top, 1) + 4;
// Implementation note: Initialize top to zero to ensure that
// initialization occurs before main() is started.
+ static _Atomic_word _S_top = 0;
+ return __gnu_cxx::__exchange_and_add_dispatch(&_S_top, 1) + 4;
}
+ void
+ ios_base::register_callback(event_callback __fn, int __index)
+ { _M_callbacks = new _Callback_list(__fn, __index, _M_callbacks); }
+
// 27.4.2.5 iword/pword storage
ios_base::_Words&
- ios_base::_M_grow_words(int ix)
+ ios_base::_M_grow_words(int __ix, bool __iword)
{
- // Precondition: _M_word_limit <= ix
- _Words zero = { 0, 0 };
- int newlimit = _S_local_words;
- _Words* words = _M_word_array;
- int i = 0;
- if (_S_local_words <= ix)
+ // Precondition: _M_word_size <= __ix
+ int __newsize = _S_local_word_size;
+ _Words* __words = _M_local_word;
+ if (__ix > _S_local_word_size - 1)
{
- newlimit = ix+1;
- try
- { words = new _Words[ix+1]; }
- catch (...)
+ if (__ix < numeric_limits<int>::max())
{
- _M_dummy = zero; // XXX MT? Not on "normal" machines.
- // XXX now in basic_ios
- // _M_clear(_M_rdstate() | badbit); // may throw
- return _M_dummy;
+ __newsize = __ix + 1;
+ __try
+ { __words = new _Words[__newsize]; }
+ __catch(const std::bad_alloc&)
+ {
+ _M_streambuf_state |= badbit;
+ if (_M_streambuf_state & _M_exception)
+ __throw_ios_failure(__N("ios_base::_M_grow_words "
+ "allocation failed"));
+ if (__iword)
+ _M_word_zero._M_iword = 0;
+ else
+ _M_word_zero._M_pword = 0;
+ return _M_word_zero;
+ }
+ for (int __i = 0; __i < _M_word_size; __i++)
+ __words[__i] = _M_word[__i];
+ if (_M_word && _M_word != _M_local_word)
+ {
+ delete [] _M_word;
+ _M_word = 0;
+ }
+ }
+ else
+ {
+ _M_streambuf_state |= badbit;
+ if (_M_streambuf_state & _M_exception)
+ __throw_ios_failure(__N("ios_base::_M_grow_words is not valid"));
+ if (__iword)
+ _M_word_zero._M_iword = 0;
+ else
+ _M_word_zero._M_pword = 0;
+ return _M_word_zero;
}
- for (; i < _M_word_limit; i++)
- words[i] = _M_words[i];
- if (_M_words != _M_word_array)
- delete [] _M_words;
}
-
- do { words[i] = zero; } while (++i < newlimit);
- _M_words = words;
- _M_word_limit = newlimit;
- return words[ix];
- }
-
- // Called only by basic_ios<>::init.
- void
- ios_base::_M_init()
- {
- // NB: May be called more than once
- _M_precision = 6;
- _M_width = 0;
- _M_flags = skipws | dec;
- _M_callbacks = 0;
- _M_words = 0;
- _M_word_limit = 0;
- _M_ios_locale = locale();
- // No init needed for _M_word_array or _M_dummy.
- }
-
- // 27.4.2.3 ios_base locale functions
- locale
- ios_base::imbue(const locale& __loc)
- {
- locale __old = _M_ios_locale;
- _M_ios_locale = __loc;
- _M_call_callbacks(imbue_event);
- return __old;
- }
-
- ios_base::ios_base()
- {
- // Do nothing; init() does it. Static init to 0 makes everything sane.
- }
-
- // 27.4.2.7 ios_base constructors/destructors
- ios_base::~ios_base()
- {
- _M_call_callbacks(erase_event);
- _M_dispose_callbacks();
- if (_M_words != _M_word_array)
- delete [] _M_words;
- // XXX done?
+ _M_word = __words;
+ _M_word_size = __newsize;
+ return _M_word[__ix];
}
void
- ios_base::register_callback(event_callback __fn, int __index)
- { _M_callbacks = new _Callback_list(__fn, __index, _M_callbacks); }
-
- void
ios_base::_M_call_callbacks(event __e) throw()
{
- for (_Callback_list* __p = _M_callbacks; __p; __p = __p->_M_next)
+ _Callback_list* __p = _M_callbacks;
+ while (__p)
{
- try {
- (*__p->_M_fn) (__e, *this, __p->_M_index);
- }
- catch (...) {
- }
+ __try
+ { (*__p->_M_fn) (__e, *this, __p->_M_index); }
+ __catch(...)
+ { }
+ __p = __p->_M_next;
}
}
void
- ios_base::_M_dispose_callbacks(void)
+ ios_base::_M_dispose_callbacks(void) throw()
{
_Callback_list* __p = _M_callbacks;
while (__p && __p->_M_remove_reference() == 0)
_M_callbacks = 0;
}
- bool
- ios_base::sync_with_stdio(bool __sync)
- {
-#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
- // 49. Underspecification of ios_base::sync_with_stdio
- bool __ret = ios_base::Init::_S_synced_with_stdio;
-#endif
-
- // Turn off sync with C FILE* for cin, cout, cerr, clog iff
- // currently synchronized.
- if (!__sync && __ret)
- {
- ios_base::Init::_S_synced_with_stdio = false;
- ios_base::Init::_S_ios_destroy();
- ios_base::Init::_S_ios_create(ios_base::Init::_S_synced_with_stdio);
- }
- return __ret;
- }
-} // namespace std
-
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
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