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* 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_IOS_BASE_H
# include <stl/_ios_base.h>
# include <stl/_ctype.h>
# include <stl/_numpunct.h>
// ----------------------------------------------------------------------
// 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
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 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));
void setstate(iostate __state) { this->clear(rdstate() | __state); }
iostate exceptions() const { return this->_M_get_exception_mask(); }
void exceptions(iostate __mask) {
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);
// Cached copy of the curent locale's ctype facet. Set by init() and imbue().
const ctype<char_type>* _M_cached_ctype;
// Equivalent to &use_facet< Facet >(getloc()), but faster.
const ctype<char_type>* _M_ctype_facet() const { return _M_cached_ctype; }
void init(basic_streambuf<_CharT, _Traits>* __streambuf);
// 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 _M_ctype_facet()->narrow(__c, __default); }
template <class _CharT, class _Traits>
inline _CharT
basic_ios<_CharT, _Traits>::widen(char __c) const
{ return _M_ctype_facet()->widen(__c); }
inline char
basic_ios<char, char_traits<char> >::narrow(char __c, char) const
return __c;
inline char
basic_ios<char, char_traits<char> >::widen(char __c) const
return __c;
_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
# include <stl/_ios.c>
#endif /* _STLP_IOS */
// Local Variables:
// mode:C++
// End: