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_IOS_BASE_H
19 #define _STLP_IOS_BASE_H
20
21 #ifndef _STLP_INTERNAL_STDEXCEPT_BASE
22 # include <stl/_stdexcept_base.h>
23 #endif
24
25 #ifndef _STLP_INTERNAL_PAIR_H
26 # include <stl/_pair.h>
27 #endif
28
29 #ifndef _STLP_INTERNAL_LOCALE_H
30 # include <stl/_locale.h>
31 #endif
32
33 #ifndef _STLP_INTERNAL_STRING_H
34 # include <stl/_string.h>
35 #endif
36
37 _STLP_BEGIN_NAMESPACE
38
39 // ----------------------------------------------------------------------
40
41 // Class ios_base. This is the base class of the ios hierarchy, which
42 // includes basic_istream and basic_ostream. Classes in the ios
43 // hierarchy are actually quite simple: they are just glorified
44 // wrapper classes. They delegate buffering and physical character
45 // manipulation to the streambuf classes, and they delegate most
46 // formatting tasks to a locale.
47
48 class _STLP_CLASS_DECLSPEC ios_base {
49 public:
50
51 class _STLP_CLASS_DECLSPEC failure : public __Named_exception {
52 public:
53 explicit failure(const string&);
54 virtual ~failure() _STLP_NOTHROW_INHERENTLY;
55 };
56
57 typedef int fmtflags;
58 typedef int iostate;
59 typedef int openmode;
60 typedef int seekdir;
61
62 # ifndef _STLP_NO_ANACHRONISMS
63 typedef fmtflags fmt_flags;
64 # endif
65
66 // Formatting flags.
67 _STLP_STATIC_CONSTANT(int, left = 0x0001);
68 _STLP_STATIC_CONSTANT(int, right = 0x0002);
69 _STLP_STATIC_CONSTANT(int, internal = 0x0004);
70 _STLP_STATIC_CONSTANT(int, dec = 0x0008);
71 _STLP_STATIC_CONSTANT(int, hex = 0x0010);
72 _STLP_STATIC_CONSTANT(int, oct = 0x0020);
73 _STLP_STATIC_CONSTANT(int, fixed = 0x0040);
74 _STLP_STATIC_CONSTANT(int, scientific = 0x0080);
75 _STLP_STATIC_CONSTANT(int, boolalpha = 0x0100);
76 _STLP_STATIC_CONSTANT(int, showbase = 0x0200);
77 _STLP_STATIC_CONSTANT(int, showpoint = 0x0400);
78 _STLP_STATIC_CONSTANT(int, showpos = 0x0800);
79 _STLP_STATIC_CONSTANT(int, skipws = 0x1000);
80 _STLP_STATIC_CONSTANT(int, unitbuf = 0x2000);
81 _STLP_STATIC_CONSTANT(int, uppercase = 0x4000);
82 _STLP_STATIC_CONSTANT(int, adjustfield = left | right | internal);
83 _STLP_STATIC_CONSTANT(int, basefield = dec | hex | oct);
84 _STLP_STATIC_CONSTANT(int, floatfield = scientific | fixed);
85
86 // State flags.
87 _STLP_STATIC_CONSTANT(int, goodbit = 0x00);
88 _STLP_STATIC_CONSTANT(int, badbit = 0x01);
89 _STLP_STATIC_CONSTANT(int, eofbit = 0x02);
90 _STLP_STATIC_CONSTANT(int, failbit = 0x04);
91
92 // Openmode flags.
93 _STLP_STATIC_CONSTANT(int, __default_mode = 0x0); /* implementation detail */
94 _STLP_STATIC_CONSTANT(int, app = 0x01);
95 _STLP_STATIC_CONSTANT(int, ate = 0x02);
96 _STLP_STATIC_CONSTANT(int, binary = 0x04);
97 _STLP_STATIC_CONSTANT(int, in = 0x08);
98 _STLP_STATIC_CONSTANT(int, out = 0x10);
99 _STLP_STATIC_CONSTANT(int, trunc = 0x20);
100
101 // Seekdir flags
102 _STLP_STATIC_CONSTANT(int, beg = 0x01);
103 _STLP_STATIC_CONSTANT(int, cur = 0x02);
104 _STLP_STATIC_CONSTANT(int, end = 0x04);
105
106 public: // Flag-manipulation functions.
flags()107 fmtflags flags() const { return _M_fmtflags; }
flags(fmtflags __flags)108 fmtflags flags(fmtflags __flags) {
109 fmtflags __tmp = _M_fmtflags;
110 _M_fmtflags = __flags;
111 return __tmp;
112 }
113
setf(fmtflags __flag)114 fmtflags setf(fmtflags __flag) {
115 fmtflags __tmp = _M_fmtflags;
116 _M_fmtflags |= __flag;
117 return __tmp;
118 }
setf(fmtflags __flag,fmtflags __mask)119 fmtflags setf(fmtflags __flag, fmtflags __mask) {
120 fmtflags __tmp = _M_fmtflags;
121 _M_fmtflags &= ~__mask;
122 _M_fmtflags |= __flag & __mask;
123 return __tmp;
124 }
unsetf(fmtflags __mask)125 void unsetf(fmtflags __mask) { _M_fmtflags &= ~__mask; }
126
precision()127 streamsize precision() const { return _M_precision; }
precision(streamsize __newprecision)128 streamsize precision(streamsize __newprecision) {
129 streamsize __tmp = _M_precision;
130 _M_precision = __newprecision;
131 return __tmp;
132 }
133
width()134 streamsize width() const { return _M_width; }
width(streamsize __newwidth)135 streamsize width(streamsize __newwidth) {
136 streamsize __tmp = _M_width;
137 _M_width = __newwidth;
138 return __tmp;
139 }
140
141 public: // Locales
142 locale imbue(const locale&);
getloc()143 locale getloc() const { return _M_locale; }
144
145 public: // Auxiliary storage.
146 static int _STLP_CALL xalloc();
147 long& iword(int __index);
148 void*& pword(int __index);
149
150 public: // Destructor.
151 virtual ~ios_base();
152
153 public: // Callbacks.
154 enum event { erase_event, imbue_event, copyfmt_event };
155 typedef void (*event_callback)(event, ios_base&, int __index);
156 void register_callback(event_callback __fn, int __index);
157
158 public: // This member function affects only
159 // the eight predefined ios objects:
160 // cin, cout, etc.
161 static bool _STLP_CALL sync_with_stdio(bool __sync = true);
162
163 public: // The C++ standard requires only that these
164 // member functions be defined in basic_ios.
165 // We define them in the non-template
166 // base class to avoid code duplication.
167 operator void*() const { return !fail() ? (void*) __CONST_CAST(ios_base*,this) : (void*) 0; }
168 bool operator!() const { return fail(); }
169
rdstate()170 iostate rdstate() const { return _M_iostate; }
171
good()172 bool good() const { return _M_iostate == 0; }
eof()173 bool eof() const { return (_M_iostate & eofbit) != 0; }
fail()174 bool fail() const { return (_M_iostate & (failbit | badbit)) != 0; }
bad()175 bool bad() const { return (_M_iostate & badbit) != 0; }
176
177 protected: // The functional protected interface.
178
179 // Copies the state of __x to *this. This member function makes it
180 // possible to implement basic_ios::copyfmt without having to expose
181 // ios_base's private data members. Does not copy _M_exception_mask
182 // or _M_iostate.
183 void _M_copy_state(const ios_base& __x);
184
_M_setstate_nothrow(iostate __state)185 void _M_setstate_nothrow(iostate __state) { _M_iostate |= __state; }
_M_clear_nothrow(iostate __state)186 void _M_clear_nothrow(iostate __state) { _M_iostate = __state; }
_M_get_exception_mask()187 iostate _M_get_exception_mask() const { return _M_exception_mask; }
_M_set_exception_mask(iostate __mask)188 void _M_set_exception_mask(iostate __mask) { _M_exception_mask = __mask; }
_M_check_exception_mask()189 void _M_check_exception_mask() {
190 if (_M_iostate & _M_exception_mask)
191 _M_throw_failure();
192 }
193
194 void _M_invoke_callbacks(event);
195 void _STLP_FUNCTION_THROWS _M_throw_failure();
196
197 ios_base(); // Default constructor.
198
199 protected: // Initialization of the I/O system
200 static void _STLP_CALL _S_initialize();
201 static void _STLP_CALL _S_uninitialize();
202 static bool _S_is_synced;
203
204 private: // Invalidate the copy constructor and
205 // assignment operator.
206 ios_base(const ios_base&);
207 void operator=(const ios_base&);
208
209 private: // Data members.
210
211 fmtflags _M_fmtflags; // Flags
212 iostate _M_iostate;
213 openmode _M_openmode;
214 seekdir _M_seekdir;
215 iostate _M_exception_mask;
216
217 streamsize _M_precision;
218 streamsize _M_width;
219
220 locale _M_locale;
221
222 pair<event_callback, int>* _M_callbacks;
223 size_t _M_num_callbacks; // Size of the callback array.
224 size_t _M_callback_index; // Index of the next available callback;
225 // initially zero.
226
227 long* _M_iwords; // Auxiliary storage. The count is zero
228 size_t _M_num_iwords; // if and only if the pointer is null.
229
230 void** _M_pwords;
231 size_t _M_num_pwords;
232
233 public:
234 // ----------------------------------------------------------------------
235 // Nested initializer class. This is an implementation detail, but it's
236 // prescribed by the standard. The static initializer object (on
237 // implementations where such a thing is required) is declared in
238 // <iostream>
239 class _STLP_CLASS_DECLSPEC Init
240 {
241 public:
242 Init();
243 ~Init();
244 private:
245 static long _S_count;
246 friend class ios_base;
247 };
248
249 friend class Init;
250
251 public:
252 # ifndef _STLP_NO_ANACHRONISMS
253 // 31.6 Old iostreams members [depr.ios.members]
254 typedef iostate io_state;
255 typedef openmode open_mode;
256 typedef seekdir seek_dir;
257 typedef _STLP_STD::streamoff streamoff;
258 typedef _STLP_STD::streampos streampos;
259 # endif
260 };
261
262 // ----------------------------------------------------------------------
263 // ios_base manipulator functions, from section 27.4.5 of the C++ standard.
264 // All of them are trivial one-line wrapper functions.
265
266 // fmtflag manipulators, section 27.4.5.1
boolalpha(ios_base & __s)267 inline ios_base& _STLP_CALL boolalpha(ios_base& __s)
268 { __s.setf(ios_base::boolalpha); return __s;}
269
noboolalpha(ios_base & __s)270 inline ios_base& _STLP_CALL noboolalpha(ios_base& __s)
271 { __s.unsetf(ios_base::boolalpha); return __s;}
272
showbase(ios_base & __s)273 inline ios_base& _STLP_CALL showbase(ios_base& __s)
274 { __s.setf(ios_base::showbase); return __s;}
275
noshowbase(ios_base & __s)276 inline ios_base& _STLP_CALL noshowbase(ios_base& __s)
277 { __s.unsetf(ios_base::showbase); return __s;}
278
showpoint(ios_base & __s)279 inline ios_base& _STLP_CALL showpoint(ios_base& __s)
280 { __s.setf(ios_base::showpoint); return __s;}
281
noshowpoint(ios_base & __s)282 inline ios_base& _STLP_CALL noshowpoint(ios_base& __s)
283 { __s.unsetf(ios_base::showpoint); return __s;}
284
showpos(ios_base & __s)285 inline ios_base& _STLP_CALL showpos(ios_base& __s)
286 { __s.setf(ios_base::showpos); return __s;}
287
noshowpos(ios_base & __s)288 inline ios_base& _STLP_CALL noshowpos(ios_base& __s)
289 { __s.unsetf(ios_base::showpos); return __s;}
290
skipws(ios_base & __s)291 inline ios_base& _STLP_CALL skipws(ios_base& __s)
292 { __s.setf(ios_base::skipws); return __s;}
293
noskipws(ios_base & __s)294 inline ios_base& _STLP_CALL noskipws(ios_base& __s)
295 { __s.unsetf(ios_base::skipws); return __s;}
296
uppercase(ios_base & __s)297 inline ios_base& _STLP_CALL uppercase(ios_base& __s)
298 { __s.setf(ios_base::uppercase); return __s;}
299
nouppercase(ios_base & __s)300 inline ios_base& _STLP_CALL nouppercase(ios_base& __s)
301 { __s.unsetf(ios_base::uppercase); return __s;}
302
unitbuf(ios_base & __s)303 inline ios_base& _STLP_CALL unitbuf(ios_base& __s)
304 { __s.setf(ios_base::unitbuf); return __s;}
305
nounitbuf(ios_base & __s)306 inline ios_base& _STLP_CALL nounitbuf(ios_base& __s)
307 { __s.unsetf(ios_base::unitbuf); return __s;}
308
309
310 // adjustfield manipulators, section 27.4.5.2
internal(ios_base & __s)311 inline ios_base& _STLP_CALL internal(ios_base& __s)
312 { __s.setf(ios_base::internal, ios_base::adjustfield); return __s; }
313
left(ios_base & __s)314 inline ios_base& _STLP_CALL left(ios_base& __s)
315 { __s.setf(ios_base::left, ios_base::adjustfield); return __s; }
316
right(ios_base & __s)317 inline ios_base& _STLP_CALL right(ios_base& __s)
318 { __s.setf(ios_base::right, ios_base::adjustfield); return __s; }
319
320 // basefield manipulators, section 27.4.5.3
dec(ios_base & __s)321 inline ios_base& _STLP_CALL dec(ios_base& __s)
322 { __s.setf(ios_base::dec, ios_base::basefield); return __s; }
323
hex(ios_base & __s)324 inline ios_base& _STLP_CALL hex(ios_base& __s)
325 { __s.setf(ios_base::hex, ios_base::basefield); return __s; }
326
oct(ios_base & __s)327 inline ios_base& _STLP_CALL oct(ios_base& __s)
328 { __s.setf(ios_base::oct, ios_base::basefield); return __s; }
329
330
331 // floatfield manipulators, section 27.4.5.3
fixed(ios_base & __s)332 inline ios_base& _STLP_CALL fixed(ios_base& __s)
333 { __s.setf(ios_base::fixed, ios_base::floatfield); return __s; }
334
scientific(ios_base & __s)335 inline ios_base& _STLP_CALL scientific(ios_base& __s)
336 { __s.setf(ios_base::scientific, ios_base::floatfield); return __s; }
337
338 _STLP_END_NAMESPACE
339
340 #endif /* _STLP_IOS_BASE */
341
342 // Local Variables:
343 // mode:C++
344 // End:
345
346