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// Iostreams base classes -*- C++ -*-
// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
// 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)
// 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.
// 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.
// 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.
//
// ISO C++ 14882: 27.4 Iostreams base classes
//
#include <ios>
#include <limits>
#include <bits/atomicity.h>
namespace std
{
// 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;
// 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;
const int ios_base::_S_local_word_size;
_Atomic_word ios_base::Init::_S_refcount;
bool ios_base::Init::_S_synced_with_stdio = true;
ios_base::ios_base()
: _M_callbacks(0), _M_word_size(_S_local_word_size), _M_word(_M_local_word)
{
// 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(&_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;
}
} // namespace std
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