Subversion Repositories openrisc_2011-10-31

// basic_ios member functions -*- C++ -*-

// Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,

// 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

// .

/** @file basic_ios.tcc

 *  This is an internal header file, included by other library headers.

 *  You should not attempt to use it directly.

 */

#ifndef _BASIC_IOS_TCC

#define _BASIC_IOS_TCC 1

#pragma GCC system_header

_GLIBCXX_BEGIN_NAMESPACE(std)

  template

    void

    basic_ios<_CharT, _Traits>::clear(iostate __state)

    {

      if (this->rdbuf())

        _M_streambuf_state = __state;

      else

          _M_streambuf_state = __state | badbit;

      if (this->exceptions() & this->rdstate())

        __throw_ios_failure(__N("basic_ios::clear"));

    }

  template

    basic_streambuf<_CharT, _Traits>*

    basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<_CharT, _Traits>* __sb)

    {

      basic_streambuf<_CharT, _Traits>* __old = _M_streambuf;

      _M_streambuf = __sb;

      this->clear();

      return __old;

    }

  template

    basic_ios<_CharT, _Traits>&

    basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs)

    {

      // _GLIBCXX_RESOLVE_LIB_DEFECTS

      // 292. effects of a.copyfmt (a)

      if (this != &__rhs)

        {

          // Per 27.1.1, do not call imbue, yet must trash all caches

          // associated with imbue()

          // Alloc any new word array first, so if it fails we have "rollback".

          _Words* __words = (__rhs._M_word_size <= _S_local_word_size) ?

                             _M_local_word : new _Words[__rhs._M_word_size];

          // Bump refs before doing callbacks, for safety.

          _Callback_list* __cb = __rhs._M_callbacks;

          if (__cb)

            __cb->_M_add_reference();

          _M_call_callbacks(erase_event);

          if (_M_word != _M_local_word)

            {

              delete [] _M_word;

              _M_word = 0;

            }

          _M_dispose_callbacks();

          // NB: Don't want any added during above.

          _M_callbacks = __cb;

          for (int __i = 0; __i < __rhs._M_word_size; ++__i)

            __words[__i] = __rhs._M_word[__i];

          _M_word = __words;

          _M_word_size = __rhs._M_word_size;

          this->flags(__rhs.flags());

          this->width(__rhs.width());

          this->precision(__rhs.precision());

          this->tie(__rhs.tie());

          this->fill(__rhs.fill());

          _M_ios_locale = __rhs.getloc();

          _M_cache_locale(_M_ios_locale);

          _M_call_callbacks(copyfmt_event);

          // The next is required to be the last assignment.

          this->exceptions(__rhs.exceptions());

        }

      return *this;

    }

  // Locales:

  template

    locale

    basic_ios<_CharT, _Traits>::imbue(const locale& __loc)

    {

      locale __old(this->getloc());

      ios_base::imbue(__loc);

      _M_cache_locale(__loc);

      if (this->rdbuf() != 0)

        this->rdbuf()->pubimbue(__loc);

      return __old;

    }

  template

    void

    basic_ios<_CharT, _Traits>::init(basic_streambuf<_CharT, _Traits>* __sb)

    {

      // NB: This may be called more than once on the same object.

      ios_base::_M_init();

      // Cache locale data and specific facets used by iostreams.

      _M_cache_locale(_M_ios_locale);

      // NB: The 27.4.4.1 Postconditions Table specifies requirements

      // after basic_ios::init() has been called. As part of this,

      // fill() must return widen(' ') any time after init() has been

      // called, which needs an imbued ctype facet of char_type to

      // return without throwing an exception. Unfortunately,

      // ctype is not necessarily a required facet, so

      // streams with char_type != [char, wchar_t] will not have it by

      // default. Because of this, the correct value for _M_fill is

      // constructed on the first call of fill(). That way,

      // unformatted input and output with non-required basic_ios

      // instantiations is possible even without imbuing the expected

      // ctype facet.

      _M_fill = _CharT();

      _M_fill_init = false;

      _M_tie = 0;

      _M_exception = goodbit;

      _M_streambuf = __sb;

      _M_streambuf_state = __sb ? goodbit : badbit;

    }

  template

    void

    basic_ios<_CharT, _Traits>::_M_cache_locale(const locale& __loc)

    {

      if (__builtin_expect(has_facet<__ctype_type>(__loc), true))

        _M_ctype = &use_facet<__ctype_type>(__loc);

      else

        _M_ctype = 0;

      if (__builtin_expect(has_facet<__num_put_type>(__loc), true))

        _M_num_put = &use_facet<__num_put_type>(__loc);

      else

        _M_num_put = 0;

      if (__builtin_expect(has_facet<__num_get_type>(__loc), true))

        _M_num_get = &use_facet<__num_get_type>(__loc);

      else

        _M_num_get = 0;

    }

  // Inhibit implicit instantiations for required instantiations,

  // which are defined via explicit instantiations elsewhere.

  // NB:  This syntax is a GNU extension.

#if _GLIBCXX_EXTERN_TEMPLATE

  extern template class basic_ios;

#ifdef _GLIBCXX_USE_WCHAR_T

  extern template class basic_ios;

#endif

#endif

_GLIBCXX_END_NAMESPACE

#endif