/*

  * Copyright (c) 1999

  * Silicon Graphics Computer Systems, Inc.

  *

  * Copyright (c) 1999

  * Boris Fomitchev

  *

  * This material is provided "as is", with absolutely no warranty expressed

  * or implied. Any use is at your own risk.

  *

  * Permission to use or copy this software for any purpose is hereby granted

  * without fee, provided the above notices are retained on all copies.

  * Permission to modify the code and to distribute modified code is granted,

  * provided the above notices are retained, and a notice that the code was

  * modified is included with the above copyright notice.

  *

  */

 #ifndef _STLP_INTERNAL_IOS_H

 #define _STLP_INTERNAL_IOS_H

 #ifndef _STLP_IOS_BASE_H

 # include <stl/_ios_base.h>

 #endif

 #ifndef _STLP_INTERNAL_CTYPE_H

 # include <stl/_ctype.h>

 #endif

 #ifndef _STLP_INTERNAL_NUMPUNCT_H

 # include <stl/_numpunct.h>

 #endif

 _STLP_BEGIN_NAMESPACE

 // ----------------------------------------------------------------------

 // Class basic_ios, a subclass of ios_base.  The only important difference

 // between the two is that basic_ios is a class template, parameterized

 // by the character type.  ios_base exists to factor out all of the

 // common properties that don't depend on the character type.

 // The second template parameter, _Traits, defaults to char_traits<_CharT>.

 // The default is declared in header <iosfwd>, and it isn't declared here

 // because C++ language rules do not allow it to be declared twice.

 template <class _CharT, class _Traits>

 class basic_ios : public ios_base {

   friend class ios_base;

 public:                         // Synonyms for types.

   typedef _CharT                     char_type;

   typedef typename _Traits::int_type int_type;

   typedef typename _Traits::pos_type pos_type;

   typedef typename _Traits::off_type off_type;

   typedef _Traits                    traits_type;

 public:                         // Constructor, destructor.

   explicit basic_ios(basic_streambuf<_CharT, _Traits>* __streambuf);

   virtual ~basic_ios() {}

 public:                         // Members from clause 27.4.4.2

   basic_ostream<_CharT, _Traits>* tie() const {

     return _M_tied_ostream;

   }

   basic_ostream<_CharT, _Traits>*

   tie(basic_ostream<char_type, traits_type>* __new_tied_ostream) {

     basic_ostream<char_type, traits_type>* __tmp = _M_tied_ostream;

     _M_tied_ostream = __new_tied_ostream;

     return __tmp;

   }

   basic_streambuf<_CharT, _Traits>* rdbuf() const

     { return _M_streambuf; }

   basic_streambuf<_CharT, _Traits>*

   rdbuf(basic_streambuf<char_type, traits_type>*);

   // Copies __x's state to *this.

   basic_ios<_CharT, _Traits>& copyfmt(const basic_ios<_CharT, _Traits>& __x);

   char_type fill() const { return _M_fill; }

   char_type fill(char_type __fill) {

     char_type __tmp(_M_fill);

     _M_fill = __fill;

     return __tmp;

   }

 public:                         // Members from 27.4.4.3.  These four functions

                                 // can almost be defined in ios_base.

   void clear(iostate __state = goodbit) {

     _M_clear_nothrow(this->rdbuf() ? __state : iostate(__state|ios_base::badbit));

     _M_check_exception_mask();

   }

   void setstate(iostate __state) { this->clear(rdstate() | __state); }

   iostate exceptions() const { return this->_M_get_exception_mask(); }

   void exceptions(iostate __mask) {

     this->_M_set_exception_mask(__mask);

     this->clear(this->rdstate());

   }

 public:                         // Locale-related member functions.

   locale imbue(const locale&);

   inline char narrow(_CharT, char) const ;

   inline _CharT widen(char) const;

   // Helper function that makes testing for EOF more convenient.

   static bool _STLP_CALL _S_eof(int_type __c) {

     const int_type __eof = _Traits::eof();

     return _Traits::eq_int_type(__c, __eof);

   }

 protected:

   basic_ios();

   void init(basic_streambuf<_CharT, _Traits>* __streambuf);

 public:

   // Helper function used in istream and ostream.  It is called only from

   // a catch clause.

   void _M_handle_exception(ios_base::iostate __flag);

 private:                        // Data members

   char_type _M_fill;            // The fill character, used for padding.

   basic_streambuf<_CharT, _Traits>* _M_streambuf;

   basic_ostream<_CharT, _Traits>*   _M_tied_ostream;

 };

 template <class _CharT, class _Traits>

 inline char

 basic_ios<_CharT, _Traits>::narrow(_CharT __c, char __default) const

 { return __STATIC_CAST(const ctype<_CharT>*, this->_M_ctype_facet())->narrow(__c, __default); }

 template <class _CharT, class _Traits>

 inline _CharT

 basic_ios<_CharT, _Traits>::widen(char __c) const

 { return __STATIC_CAST(const ctype<_CharT>*, this->_M_ctype_facet())->widen(__c); }

 # if !defined (_STLP_NO_METHOD_SPECIALIZATION)

 _STLP_TEMPLATE_NULL

 inline char

 basic_ios<char, char_traits<char> >::narrow(char __c, char) const

 {

   return __c;

 }

 _STLP_TEMPLATE_NULL

 inline char

 basic_ios<char, char_traits<char> >::widen(char __c) const

 {

   return __c;

 }

 # endif /* _STLP_NO_METHOD_SPECIALIZATION */

 # if defined (_STLP_USE_TEMPLATE_EXPORT)

 _STLP_EXPORT_TEMPLATE_CLASS basic_ios<char, char_traits<char> >;

 #  if ! defined (_STLP_NO_WCHAR_T)

 _STLP_EXPORT_TEMPLATE_CLASS basic_ios<wchar_t, char_traits<wchar_t> >;

 #  endif

 # endif /* _STLP_USE_TEMPLATE_EXPORT */

 _STLP_END_NAMESPACE

 #if defined (_STLP_EXPOSE_STREAM_IMPLEMENTATION) && !defined (_STLP_LINK_TIME_INSTANTIATION)

 #  include <stl/_ios.c>

 #endif

 #endif /* _STLP_IOS */

 // Local Variables:

 // mode:C++

 // End: