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188 lines
5.5 KiB
C
188 lines
5.5 KiB
C
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/*
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* Copyright (c) 1999
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* Silicon Graphics Computer Systems, Inc.
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*
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* Copyright (c) 1999
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* Boris Fomitchev
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*
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* This material is provided "as is", with absolutely no warranty expressed
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* or implied. Any use is at your own risk.
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*
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* Permission to use or copy this software for any purpose is hereby granted
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* without fee, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*
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*/
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#ifndef _STLP_INTERNAL_IOS_H
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#define _STLP_INTERNAL_IOS_H
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#ifndef _STLP_IOS_BASE_H
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# include <stl/_ios_base.h>
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#endif
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#ifndef _STLP_INTERNAL_CTYPE_H
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# include <stl/_ctype.h>
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#endif
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#ifndef _STLP_INTERNAL_NUMPUNCT_H
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# include <stl/_numpunct.h>
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#endif
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_STLP_BEGIN_NAMESPACE
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// ----------------------------------------------------------------------
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// Class basic_ios, a subclass of ios_base. The only important difference
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// between the two is that basic_ios is a class template, parameterized
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// by the character type. ios_base exists to factor out all of the
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// common properties that don't depend on the character type.
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// The second template parameter, _Traits, defaults to char_traits<_CharT>.
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// The default is declared in header <iosfwd>, and it isn't declared here
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// because C++ language rules do not allow it to be declared twice.
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template <class _CharT, class _Traits>
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class basic_ios : public ios_base {
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friend class ios_base;
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public: // Synonyms for types.
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typedef _CharT char_type;
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typedef typename _Traits::int_type int_type;
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typedef typename _Traits::pos_type pos_type;
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typedef typename _Traits::off_type off_type;
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typedef _Traits traits_type;
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public: // Constructor, destructor.
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explicit basic_ios(basic_streambuf<_CharT, _Traits>* __streambuf);
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virtual ~basic_ios() {}
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public: // Members from clause 27.4.4.2
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basic_ostream<_CharT, _Traits>* tie() const {
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return _M_tied_ostream;
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}
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basic_ostream<_CharT, _Traits>*
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tie(basic_ostream<char_type, traits_type>* __new_tied_ostream) {
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basic_ostream<char_type, traits_type>* __tmp = _M_tied_ostream;
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_M_tied_ostream = __new_tied_ostream;
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return __tmp;
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}
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basic_streambuf<_CharT, _Traits>* rdbuf() const
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{ return _M_streambuf; }
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basic_streambuf<_CharT, _Traits>*
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rdbuf(basic_streambuf<char_type, traits_type>*);
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// Copies __x's state to *this.
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basic_ios<_CharT, _Traits>& copyfmt(const basic_ios<_CharT, _Traits>& __x);
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char_type fill() const { return _M_fill; }
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char_type fill(char_type __fill) {
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char_type __tmp(_M_fill);
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_M_fill = __fill;
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return __tmp;
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}
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public: // Members from 27.4.4.3. These four functions
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// can almost be defined in ios_base.
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void clear(iostate __state = goodbit) {
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_M_clear_nothrow(this->rdbuf() ? __state : iostate(__state|ios_base::badbit));
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_M_check_exception_mask();
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}
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void setstate(iostate __state) { this->clear(rdstate() | __state); }
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iostate exceptions() const { return this->_M_get_exception_mask(); }
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void exceptions(iostate __mask) {
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this->_M_set_exception_mask(__mask);
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this->clear(this->rdstate());
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}
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public: // Locale-related member functions.
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locale imbue(const locale&);
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inline char narrow(_CharT, char) const ;
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inline _CharT widen(char) const;
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// Helper function that makes testing for EOF more convenient.
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static bool _STLP_CALL _S_eof(int_type __c) {
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const int_type __eof = _Traits::eof();
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return _Traits::eq_int_type(__c, __eof);
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}
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protected:
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// Cached copy of the curent locale's ctype facet. Set by init() and imbue().
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const ctype<char_type>* _M_cached_ctype;
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public:
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// Equivalent to &use_facet< Facet >(getloc()), but faster.
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const ctype<char_type>* _M_ctype_facet() const { return _M_cached_ctype; }
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protected:
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basic_ios();
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void init(basic_streambuf<_CharT, _Traits>* __streambuf);
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public:
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// Helper function used in istream and ostream. It is called only from
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// a catch clause.
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void _M_handle_exception(ios_base::iostate __flag);
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private: // Data members
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char_type _M_fill; // The fill character, used for padding.
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basic_streambuf<_CharT, _Traits>* _M_streambuf;
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basic_ostream<_CharT, _Traits>* _M_tied_ostream;
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};
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template <class _CharT, class _Traits>
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inline char
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basic_ios<_CharT, _Traits>::narrow(_CharT __c, char __default) const
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{ return _M_ctype_facet()->narrow(__c, __default); }
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template <class _CharT, class _Traits>
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inline _CharT
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basic_ios<_CharT, _Traits>::widen(char __c) const
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{ return _M_ctype_facet()->widen(__c); }
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# if !defined (_STLP_NO_METHOD_SPECIALIZATION)
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_STLP_TEMPLATE_NULL
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inline char
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basic_ios<char, char_traits<char> >::narrow(char __c, char) const
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{
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return __c;
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}
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_STLP_TEMPLATE_NULL
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inline char
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basic_ios<char, char_traits<char> >::widen(char __c) const
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{
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return __c;
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}
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# endif /* _STLP_NO_METHOD_SPECIALIZATION */
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# if defined (_STLP_USE_TEMPLATE_EXPORT)
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_STLP_EXPORT_TEMPLATE_CLASS basic_ios<char, char_traits<char> >;
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# if ! defined (_STLP_NO_WCHAR_T)
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_STLP_EXPORT_TEMPLATE_CLASS basic_ios<wchar_t, char_traits<wchar_t> >;
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# endif
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# endif /* _STLP_USE_TEMPLATE_EXPORT */
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_STLP_END_NAMESPACE
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#if defined (_STLP_EXPOSE_STREAM_IMPLEMENTATION) && !defined (_STLP_LINK_TIME_INSTANTIATION)
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# include <stl/_ios.c>
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#endif
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#endif /* _STLP_IOS */
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// Local Variables:
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// mode:C++
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// End:
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