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1 : // Standard stream manipulators -*- C++ -*-
2 :
3 : // Copyright (C) 1997-2013 Free Software Foundation, Inc.
4 : //
5 : // This file is part of the GNU ISO C++ Library. This library is free
6 : // software; you can redistribute it and/or modify it under the
7 : // terms of the GNU General Public License as published by the
8 : // Free Software Foundation; either version 3, or (at your option)
9 : // any later version.
10 :
11 : // This library is distributed in the hope that it will be useful,
12 : // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 : // GNU General Public License for more details.
15 :
16 : // Under Section 7 of GPL version 3, you are granted additional
17 : // permissions described in the GCC Runtime Library Exception, version
18 : // 3.1, as published by the Free Software Foundation.
19 :
20 : // You should have received a copy of the GNU General Public License and
21 : // a copy of the GCC Runtime Library Exception along with this program;
22 : // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 : // <http://www.gnu.org/licenses/>.
24 :
25 : /** @file include/iomanip
26 : * This is a Standard C++ Library header.
27 : */
28 :
29 : //
30 : // ISO C++ 14882: 27.6.3 Standard manipulators
31 : //
32 :
33 : #ifndef _GLIBCXX_IOMANIP
34 : #define _GLIBCXX_IOMANIP 1
35 :
36 : #pragma GCC system_header
37 :
38 : #include <bits/c++config.h>
39 : #include <iosfwd>
40 : #include <bits/ios_base.h>
41 :
42 : #if __cplusplus >= 201103L
43 : #include <locale>
44 : #endif
45 :
46 : namespace std _GLIBCXX_VISIBILITY(default)
47 : {
48 : _GLIBCXX_BEGIN_NAMESPACE_VERSION
49 :
50 : // [27.6.3] standard manipulators
51 : // Also see DR 183.
52 :
53 : struct _Resetiosflags { ios_base::fmtflags _M_mask; };
54 :
55 : /**
56 : * @brief Manipulator for @c setf.
57 : * @param __mask A format flags mask.
58 : *
59 : * Sent to a stream object, this manipulator resets the specified flags,
60 : * via @e stream.setf(0,__mask).
61 : */
62 : inline _Resetiosflags
63 : resetiosflags(ios_base::fmtflags __mask)
64 : { return { __mask }; }
65 :
66 : template<typename _CharT, typename _Traits>
67 : inline basic_istream<_CharT, _Traits>&
68 : operator>>(basic_istream<_CharT, _Traits>& __is, _Resetiosflags __f)
69 : {
70 : __is.setf(ios_base::fmtflags(0), __f._M_mask);
71 : return __is;
72 : }
73 :
74 : template<typename _CharT, typename _Traits>
75 : inline basic_ostream<_CharT, _Traits>&
76 : operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f)
77 : {
78 : __os.setf(ios_base::fmtflags(0), __f._M_mask);
79 : return __os;
80 : }
81 :
82 :
83 : struct _Setiosflags { ios_base::fmtflags _M_mask; };
84 :
85 : /**
86 : * @brief Manipulator for @c setf.
87 : * @param __mask A format flags mask.
88 : *
89 : * Sent to a stream object, this manipulator sets the format flags
90 : * to @a __mask.
91 : */
92 : inline _Setiosflags
93 : setiosflags(ios_base::fmtflags __mask)
94 : { return { __mask }; }
95 :
96 : template<typename _CharT, typename _Traits>
97 : inline basic_istream<_CharT, _Traits>&
98 : operator>>(basic_istream<_CharT, _Traits>& __is, _Setiosflags __f)
99 : {
100 : __is.setf(__f._M_mask);
101 : return __is;
102 : }
103 :
104 : template<typename _CharT, typename _Traits>
105 : inline basic_ostream<_CharT, _Traits>&
106 : operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f)
107 : {
108 : __os.setf(__f._M_mask);
109 : return __os;
110 : }
111 :
112 :
113 : struct _Setbase { int _M_base; };
114 :
115 : /**
116 : * @brief Manipulator for @c setf.
117 : * @param __base A numeric base.
118 : *
119 : * Sent to a stream object, this manipulator changes the
120 : * @c ios_base::basefield flags to @c oct, @c dec, or @c hex when @a base
121 : * is 8, 10, or 16, accordingly, and to 0 if @a __base is any other value.
122 : */
123 : inline _Setbase
124 : setbase(int __base)
125 : { return { __base }; }
126 :
127 : template<typename _CharT, typename _Traits>
128 : inline basic_istream<_CharT, _Traits>&
129 : operator>>(basic_istream<_CharT, _Traits>& __is, _Setbase __f)
130 : {
131 : __is.setf(__f._M_base == 8 ? ios_base::oct :
132 : __f._M_base == 10 ? ios_base::dec :
133 : __f._M_base == 16 ? ios_base::hex :
134 : ios_base::fmtflags(0), ios_base::basefield);
135 : return __is;
136 : }
137 :
138 : template<typename _CharT, typename _Traits>
139 : inline basic_ostream<_CharT, _Traits>&
140 : operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f)
141 : {
142 : __os.setf(__f._M_base == 8 ? ios_base::oct :
143 : __f._M_base == 10 ? ios_base::dec :
144 : __f._M_base == 16 ? ios_base::hex :
145 : ios_base::fmtflags(0), ios_base::basefield);
146 : return __os;
147 : }
148 :
149 :
150 : template<typename _CharT>
151 : struct _Setfill { _CharT _M_c; };
152 :
153 : /**
154 : * @brief Manipulator for @c fill.
155 : * @param __c The new fill character.
156 : *
157 : * Sent to a stream object, this manipulator calls @c fill(__c) for that
158 : * object.
159 : */
160 : template<typename _CharT>
161 : inline _Setfill<_CharT>
162 : setfill(_CharT __c)
163 : { return { __c }; }
164 :
165 : template<typename _CharT, typename _Traits>
166 : inline basic_istream<_CharT, _Traits>&
167 : operator>>(basic_istream<_CharT, _Traits>& __is, _Setfill<_CharT> __f)
168 : {
169 : __is.fill(__f._M_c);
170 : return __is;
171 : }
172 :
173 : template<typename _CharT, typename _Traits>
174 : inline basic_ostream<_CharT, _Traits>&
175 : operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f)
176 : {
177 0 : __os.fill(__f._M_c);
178 : return __os;
179 : }
180 :
181 :
182 : struct _Setprecision { int _M_n; };
183 :
184 : /**
185 : * @brief Manipulator for @c precision.
186 : * @param __n The new precision.
187 : *
188 : * Sent to a stream object, this manipulator calls @c precision(__n) for
189 : * that object.
190 : */
191 : inline _Setprecision
192 : setprecision(int __n)
193 : { return { __n }; }
194 :
195 : template<typename _CharT, typename _Traits>
196 : inline basic_istream<_CharT, _Traits>&
197 : operator>>(basic_istream<_CharT, _Traits>& __is, _Setprecision __f)
198 : {
199 : __is.precision(__f._M_n);
200 : return __is;
201 : }
202 :
203 : template<typename _CharT, typename _Traits>
204 : inline basic_ostream<_CharT, _Traits>&
205 : operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f)
206 : {
207 : __os.precision(__f._M_n);
208 : return __os;
209 : }
210 :
211 :
212 : struct _Setw { int _M_n; };
213 :
214 : /**
215 : * @brief Manipulator for @c width.
216 : * @param __n The new width.
217 : *
218 : * Sent to a stream object, this manipulator calls @c width(__n) for
219 : * that object.
220 : */
221 : inline _Setw
222 : setw(int __n)
223 : { return { __n }; }
224 :
225 : template<typename _CharT, typename _Traits>
226 : inline basic_istream<_CharT, _Traits>&
227 : operator>>(basic_istream<_CharT, _Traits>& __is, _Setw __f)
228 : {
229 : __is.width(__f._M_n);
230 : return __is;
231 : }
232 :
233 : template<typename _CharT, typename _Traits>
234 : inline basic_ostream<_CharT, _Traits>&
235 : operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f)
236 : {
237 0 : __os.width(__f._M_n);
238 : return __os;
239 : }
240 :
241 : #if __cplusplus >= 201103L
242 :
243 : template<typename _MoneyT>
244 : struct _Get_money { _MoneyT& _M_mon; bool _M_intl; };
245 :
246 : /**
247 : * @brief Extended manipulator for extracting money.
248 : * @param __mon Either long double or a specialization of @c basic_string.
249 : * @param __intl A bool indicating whether international format
250 : * is to be used.
251 : *
252 : * Sent to a stream object, this manipulator extracts @a __mon.
253 : */
254 : template<typename _MoneyT>
255 : inline _Get_money<_MoneyT>
256 : get_money(_MoneyT& __mon, bool __intl = false)
257 : { return { __mon, __intl }; }
258 :
259 : template<typename _CharT, typename _Traits, typename _MoneyT>
260 : basic_istream<_CharT, _Traits>&
261 : operator>>(basic_istream<_CharT, _Traits>& __is, _Get_money<_MoneyT> __f)
262 : {
263 : typename basic_istream<_CharT, _Traits>::sentry __cerb(__is, false);
264 : if (__cerb)
265 : {
266 : ios_base::iostate __err = ios_base::goodbit;
267 : __try
268 : {
269 : typedef istreambuf_iterator<_CharT, _Traits> _Iter;
270 : typedef money_get<_CharT, _Iter> _MoneyGet;
271 :
272 : const _MoneyGet& __mg = use_facet<_MoneyGet>(__is.getloc());
273 : __mg.get(_Iter(__is.rdbuf()), _Iter(), __f._M_intl,
274 : __is, __err, __f._M_mon);
275 : }
276 : __catch(__cxxabiv1::__forced_unwind&)
277 : {
278 : __is._M_setstate(ios_base::badbit);
279 : __throw_exception_again;
280 : }
281 : __catch(...)
282 : { __is._M_setstate(ios_base::badbit); }
283 : if (__err)
284 : __is.setstate(__err);
285 : }
286 : return __is;
287 : }
288 :
289 :
290 : template<typename _MoneyT>
291 : struct _Put_money { const _MoneyT& _M_mon; bool _M_intl; };
292 :
293 : /**
294 : * @brief Extended manipulator for inserting money.
295 : * @param __mon Either long double or a specialization of @c basic_string.
296 : * @param __intl A bool indicating whether international format
297 : * is to be used.
298 : *
299 : * Sent to a stream object, this manipulator inserts @a __mon.
300 : */
301 : template<typename _MoneyT>
302 : inline _Put_money<_MoneyT>
303 : put_money(const _MoneyT& __mon, bool __intl = false)
304 : { return { __mon, __intl }; }
305 :
306 : template<typename _CharT, typename _Traits, typename _MoneyT>
307 : basic_ostream<_CharT, _Traits>&
308 : operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f)
309 : {
310 : typename basic_ostream<_CharT, _Traits>::sentry __cerb(__os);
311 : if (__cerb)
312 : {
313 : ios_base::iostate __err = ios_base::goodbit;
314 : __try
315 : {
316 : typedef ostreambuf_iterator<_CharT, _Traits> _Iter;
317 : typedef money_put<_CharT, _Iter> _MoneyPut;
318 :
319 : const _MoneyPut& __mp = use_facet<_MoneyPut>(__os.getloc());
320 : if (__mp.put(_Iter(__os.rdbuf()), __f._M_intl, __os,
321 : __os.fill(), __f._M_mon).failed())
322 : __err |= ios_base::badbit;
323 : }
324 : __catch(__cxxabiv1::__forced_unwind&)
325 : {
326 : __os._M_setstate(ios_base::badbit);
327 : __throw_exception_again;
328 : }
329 : __catch(...)
330 : { __os._M_setstate(ios_base::badbit); }
331 : if (__err)
332 : __os.setstate(__err);
333 : }
334 : return __os;
335 : }
336 :
337 : #endif
338 :
339 : // Inhibit implicit instantiations for required instantiations,
340 : // which are defined via explicit instantiations elsewhere.
341 : // NB: This syntax is a GNU extension.
342 : #if _GLIBCXX_EXTERN_TEMPLATE
343 : extern template ostream& operator<<(ostream&, _Setfill<char>);
344 : extern template ostream& operator<<(ostream&, _Setiosflags);
345 : extern template ostream& operator<<(ostream&, _Resetiosflags);
346 : extern template ostream& operator<<(ostream&, _Setbase);
347 : extern template ostream& operator<<(ostream&, _Setprecision);
348 : extern template ostream& operator<<(ostream&, _Setw);
349 : extern template istream& operator>>(istream&, _Setfill<char>);
350 : extern template istream& operator>>(istream&, _Setiosflags);
351 : extern template istream& operator>>(istream&, _Resetiosflags);
352 : extern template istream& operator>>(istream&, _Setbase);
353 : extern template istream& operator>>(istream&, _Setprecision);
354 : extern template istream& operator>>(istream&, _Setw);
355 :
356 : #ifdef _GLIBCXX_USE_WCHAR_T
357 : extern template wostream& operator<<(wostream&, _Setfill<wchar_t>);
358 : extern template wostream& operator<<(wostream&, _Setiosflags);
359 : extern template wostream& operator<<(wostream&, _Resetiosflags);
360 : extern template wostream& operator<<(wostream&, _Setbase);
361 : extern template wostream& operator<<(wostream&, _Setprecision);
362 : extern template wostream& operator<<(wostream&, _Setw);
363 : extern template wistream& operator>>(wistream&, _Setfill<wchar_t>);
364 : extern template wistream& operator>>(wistream&, _Setiosflags);
365 : extern template wistream& operator>>(wistream&, _Resetiosflags);
366 : extern template wistream& operator>>(wistream&, _Setbase);
367 : extern template wistream& operator>>(wistream&, _Setprecision);
368 : extern template wistream& operator>>(wistream&, _Setw);
369 : #endif
370 : #endif
371 :
372 : _GLIBCXX_END_NAMESPACE_VERSION
373 : } // namespace
374 :
375 : #endif /* _GLIBCXX_IOMANIP */
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