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// Iostreams base classes -*- C++ -*-
// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
// 2006, 2007, 2008, 2009
// 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 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// 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.
// 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 <limits>
_GLIBCXX_BEGIN_NAMESPACE(std)
// Definitions for static const members of ios_base.
const ios_base::fmtflags ios_base::boolalpha;
const ios_base::fmtflags ios_base::dec;
const ios_base::fmtflags ios_base::fixed;
const ios_base::fmtflags ios_base::hex;
const ios_base::fmtflags ios_base::internal;
const ios_base::fmtflags ios_base::left;
const ios_base::fmtflags ios_base::oct;
const ios_base::fmtflags ios_base::right;
const ios_base::fmtflags ios_base::scientific;
const ios_base::fmtflags ios_base::showbase;
const ios_base::fmtflags ios_base::showpoint;
const ios_base::fmtflags ios_base::showpos;
const ios_base::fmtflags ios_base::skipws;
const ios_base::fmtflags ios_base::unitbuf;
const ios_base::fmtflags ios_base::uppercase;
const ios_base::fmtflags ios_base::adjustfield;
const ios_base::fmtflags ios_base::basefield;
const ios_base::fmtflags ios_base::floatfield;
const ios_base::iostate ios_base::badbit;
const ios_base::iostate ios_base::eofbit;
const ios_base::iostate ios_base::failbit;
const ios_base::iostate ios_base::goodbit;
const ios_base::openmode ios_base::app;
const ios_base::openmode ios_base::ate;
const ios_base::openmode ios_base::binary;
const ios_base::openmode ios_base::in;
const ios_base::openmode ios_base::out;
const ios_base::openmode ios_base::trunc;
const ios_base::seekdir ios_base::beg;
const ios_base::seekdir ios_base::cur;
const ios_base::seekdir ios_base::end;
_Atomic_word ios_base::Init::_S_refcount;
bool ios_base::Init::_S_synced_with_stdio = true;
ios_base::ios_base()
: _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()
{
// 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.
}
// 27.4.2.7 ios_base constructors/destructors
ios_base::~ios_base()
{
_M_call_callbacks(erase_event);
_M_dispose_callbacks();
if (_M_word != _M_local_word)
{
delete [] _M_word;
_M_word = 0;
}
}
// 27.4.2.5 ios_base storage functions
int
ios_base::xalloc() throw()
{
// 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, bool __iword)
{
// Precondition: _M_word_size <= __ix
int __newsize = _S_local_word_size;
_Words* __words = _M_local_word;
if (__ix > _S_local_word_size - 1)
{
if (__ix < numeric_limits<int>::max())
{
__newsize = __ix + 1;
__try
{ __words = new _Words[__newsize]; }
__catch(...)
{
_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;
}
}
_M_word = __words;
_M_word_size = __newsize;
return _M_word[__ix];
}
void
ios_base::_M_call_callbacks(event __e) throw()
{
_Callback_list* __p = _M_callbacks;
while (__p)
{
__try
{ (*__p->_M_fn) (__e, *this, __p->_M_index); }
__catch(...)
{ }
__p = __p->_M_next;
}
}
void
ios_base::_M_dispose_callbacks(void)
{
_Callback_list* __p = _M_callbacks;
while (__p && __p->_M_remove_reference() == 0)
{
_Callback_list* __next = __p->_M_next;
delete __p;
__p = __next;
}
_M_callbacks = 0;
}
_GLIBCXX_END_NAMESPACE
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