• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Copyright (c) 1999
3  * Silicon Graphics Computer Systems, Inc.
4  *
5  * Copyright (c) 1999
6  * Boris Fomitchev
7  *
8  * This material is provided "as is", with absolutely no warranty expressed
9  * or implied. Any use is at your own risk.
10  *
11  * Permission to use or copy this software for any purpose is hereby granted
12  * without fee, provided the above notices are retained on all copies.
13  * Permission to modify the code and to distribute modified code is granted,
14  * provided the above notices are retained, and a notice that the code was
15  * modified is included with the above copyright notice.
16  *
17  */
18 #ifndef _STLP_INTERNAL_IOS_H
19 #define _STLP_INTERNAL_IOS_H
20 
21 
22 #ifndef _STLP_IOS_BASE_H
23 # include <stl/_ios_base.h>
24 #endif
25 
26 #ifndef _STLP_INTERNAL_CTYPE_H
27 # include <stl/_ctype.h>
28 #endif
29 
30 #ifndef _STLP_INTERNAL_NUMPUNCT_H
31 # include <stl/_numpunct.h>
32 #endif
33 
34 _STLP_BEGIN_NAMESPACE
35 
36 // ----------------------------------------------------------------------
37 
38 // Class basic_ios, a subclass of ios_base.  The only important difference
39 // between the two is that basic_ios is a class template, parameterized
40 // by the character type.  ios_base exists to factor out all of the
41 // common properties that don't depend on the character type.
42 
43 // The second template parameter, _Traits, defaults to char_traits<_CharT>.
44 // The default is declared in header <iosfwd>, and it isn't declared here
45 // because C++ language rules do not allow it to be declared twice.
46 
47 template <class _CharT, class _Traits>
48 class basic_ios : public ios_base {
49   friend class ios_base;
50 public:                         // Synonyms for types.
51   typedef _CharT                     char_type;
52   typedef typename _Traits::int_type int_type;
53   typedef typename _Traits::pos_type pos_type;
54   typedef typename _Traits::off_type off_type;
55   typedef _Traits                    traits_type;
56 
57 public:                         // Constructor, destructor.
58   explicit basic_ios(basic_streambuf<_CharT, _Traits>* __streambuf);
~basic_ios()59   virtual ~basic_ios() {}
60 
61 public:                         // Members from clause 27.4.4.2
tie()62   basic_ostream<_CharT, _Traits>* tie() const {
63     return _M_tied_ostream;
64   }
65   basic_ostream<_CharT, _Traits>*
tie(basic_ostream<char_type,traits_type> * __new_tied_ostream)66   tie(basic_ostream<char_type, traits_type>* __new_tied_ostream) {
67     basic_ostream<char_type, traits_type>* __tmp = _M_tied_ostream;
68     _M_tied_ostream = __new_tied_ostream;
69     return __tmp;
70   }
71 
rdbuf()72   basic_streambuf<_CharT, _Traits>* rdbuf() const
73     { return _M_streambuf; }
74 
75   basic_streambuf<_CharT, _Traits>*
76   rdbuf(basic_streambuf<char_type, traits_type>*);
77 
78   // Copies __x's state to *this.
79   basic_ios<_CharT, _Traits>& copyfmt(const basic_ios<_CharT, _Traits>& __x);
80 
fill()81   char_type fill() const { return _M_fill; }
fill(char_type __fill)82   char_type fill(char_type __fill) {
83     char_type __tmp(_M_fill);
84     _M_fill = __fill;
85     return __tmp;
86   }
87 
88 public:                         // Members from 27.4.4.3.  These four functions
89                                 // can almost be defined in ios_base.
90 
91   void clear(iostate __state = goodbit) {
92     _M_clear_nothrow(this->rdbuf() ? __state : iostate(__state|ios_base::badbit));
93     _M_check_exception_mask();
94   }
setstate(iostate __state)95   void setstate(iostate __state) { this->clear(rdstate() | __state); }
96 
exceptions()97   iostate exceptions() const { return this->_M_get_exception_mask(); }
exceptions(iostate __mask)98   void exceptions(iostate __mask) {
99     this->_M_set_exception_mask(__mask);
100     this->clear(this->rdstate());
101   }
102 
103 public:                         // Locale-related member functions.
104   locale imbue(const locale&);
105 
106   inline char narrow(_CharT, char) const ;
107   inline _CharT widen(char) const;
108 
109   // Helper function that makes testing for EOF more convenient.
_S_eof(int_type __c)110   static bool _STLP_CALL _S_eof(int_type __c) {
111     const int_type __eof = _Traits::eof();
112     return _Traits::eq_int_type(__c, __eof);
113   }
114 
115 protected:
116   // Cached copy of the curent locale's ctype facet.  Set by init() and imbue().
117   const ctype<char_type>* _M_cached_ctype;
118 
119 public:
120   // Equivalent to &use_facet< Facet >(getloc()), but faster.
_M_ctype_facet()121   const ctype<char_type>* _M_ctype_facet() const { return _M_cached_ctype; }
122 
123 protected:
124   basic_ios();
125 
126   void init(basic_streambuf<_CharT, _Traits>* __streambuf);
127 
128 public:
129 
130   // Helper function used in istream and ostream.  It is called only from
131   // a catch clause.
132   void _M_handle_exception(ios_base::iostate __flag);
133 
134 private:                        // Data members
135   char_type _M_fill;            // The fill character, used for padding.
136 
137   basic_streambuf<_CharT, _Traits>* _M_streambuf;
138   basic_ostream<_CharT, _Traits>*   _M_tied_ostream;
139 
140 };
141 
142 
143 template <class _CharT, class _Traits>
144 inline char
narrow(_CharT __c,char __default)145 basic_ios<_CharT, _Traits>::narrow(_CharT __c, char __default) const
146 { return _M_ctype_facet()->narrow(__c, __default); }
147 
148 template <class _CharT, class _Traits>
149 inline _CharT
widen(char __c)150 basic_ios<_CharT, _Traits>::widen(char __c) const
151 { return _M_ctype_facet()->widen(__c); }
152 
153 # if !defined (_STLP_NO_METHOD_SPECIALIZATION)
154 _STLP_TEMPLATE_NULL
155 inline char
narrow(char __c,char)156 basic_ios<char, char_traits<char> >::narrow(char __c, char) const
157 {
158   return __c;
159 }
160 
161 _STLP_TEMPLATE_NULL
162 inline char
widen(char __c)163 basic_ios<char, char_traits<char> >::widen(char __c) const
164 {
165   return __c;
166 }
167 # endif /* _STLP_NO_METHOD_SPECIALIZATION */
168 
169 # if defined (_STLP_USE_TEMPLATE_EXPORT)
170 _STLP_EXPORT_TEMPLATE_CLASS basic_ios<char, char_traits<char> >;
171 #  if ! defined (_STLP_NO_WCHAR_T)
172 _STLP_EXPORT_TEMPLATE_CLASS basic_ios<wchar_t, char_traits<wchar_t> >;
173 #  endif
174 # endif /* _STLP_USE_TEMPLATE_EXPORT */
175 
176 _STLP_END_NAMESPACE
177 
178 #if defined (_STLP_EXPOSE_STREAM_IMPLEMENTATION) && !defined (_STLP_LINK_TIME_INSTANTIATION)
179 #  include <stl/_ios.c>
180 #endif
181 
182 #endif /* _STLP_IOS */
183 
184 // Local Variables:
185 // mode:C++
186 // End:
187 
188