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