1 : // Standard stream manipulators -*- C++ -*-
2 :
3 : // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
4 : // 2006, 2007, 2008, 2009, 2010
5 : // Free Software Foundation, Inc.
6 : //
7 : // This file is part of the GNU ISO C++ Library. This library is free
8 : // software; you can redistribute it and/or modify it under the
9 : // terms of the GNU General Public License as published by the
10 : // Free Software Foundation; either version 3, or (at your option)
11 : // any later version.
12 :
13 : // This library is distributed in the hope that it will be useful,
14 : // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 : // GNU General Public License for more details.
17 :
18 : // Under Section 7 of GPL version 3, you are granted additional
19 : // permissions described in the GCC Runtime Library Exception, version
20 : // 3.1, as published by the Free Software Foundation.
21 :
22 : // You should have received a copy of the GNU General Public License and
23 : // a copy of the GCC Runtime Library Exception along with this program;
24 : // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
25 : // <http://www.gnu.org/licenses/>.
26 :
27 : /** @file include/iomanip
28 : * This is a Standard C++ Library header.
29 : */
30 :
31 : //
32 : // ISO C++ 14882: 27.6.3 Standard manipulators
33 : //
34 :
35 : #ifndef _GLIBCXX_IOMANIP
36 : #define _GLIBCXX_IOMANIP 1
37 :
38 : #pragma GCC system_header
39 :
40 : #include <bits/c++config.h>
41 : #include <iosfwd>
42 : #include <bits/ios_base.h>
43 :
44 : #ifdef __GXX_EXPERIMENTAL_CXX0X__
45 : #include <locale>
46 : #endif
47 :
48 : namespace std _GLIBCXX_VISIBILITY(default)
49 : {
50 : _GLIBCXX_BEGIN_NAMESPACE_VERSION
51 :
52 : // [27.6.3] standard manipulators
53 : // Also see DR 183.
54 :
55 : struct _Resetiosflags { ios_base::fmtflags _M_mask; };
56 :
57 : /**
58 : * @brief Manipulator for @c setf.
59 : * @param mask A format flags mask.
60 : *
61 : * Sent to a stream object, this manipulator resets the specified flags,
62 : * via @e stream.setf(0,mask).
63 : */
64 : inline _Resetiosflags
65 900 : resetiosflags(ios_base::fmtflags __mask)
66 900 : { return { __mask }; }
67 :
68 : template<typename _CharT, typename _Traits>
69 : inline basic_istream<_CharT, _Traits>&
70 : operator>>(basic_istream<_CharT, _Traits>& __is, _Resetiosflags __f)
71 : {
72 : __is.setf(ios_base::fmtflags(0), __f._M_mask);
73 : return __is;
74 : }
75 :
76 : template<typename _CharT, typename _Traits>
77 : inline basic_ostream<_CharT, _Traits>&
78 0 : operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f)
79 : {
80 0 : __os.setf(ios_base::fmtflags(0), __f._M_mask);
81 0 : return __os;
82 : }
83 :
84 :
85 : struct _Setiosflags { ios_base::fmtflags _M_mask; };
86 :
87 : /**
88 : * @brief Manipulator for @c setf.
89 : * @param mask A format flags mask.
90 : *
91 : * Sent to a stream object, this manipulator sets the format flags
92 : * to @a mask.
93 : */
94 : inline _Setiosflags
95 : setiosflags(ios_base::fmtflags __mask)
96 : { return { __mask }; }
97 :
98 : template<typename _CharT, typename _Traits>
99 : inline basic_istream<_CharT, _Traits>&
100 : operator>>(basic_istream<_CharT, _Traits>& __is, _Setiosflags __f)
101 : {
102 : __is.setf(__f._M_mask);
103 : return __is;
104 : }
105 :
106 : template<typename _CharT, typename _Traits>
107 : inline basic_ostream<_CharT, _Traits>&
108 : operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f)
109 : {
110 : __os.setf(__f._M_mask);
111 : return __os;
112 : }
113 :
114 :
115 : struct _Setbase { int _M_base; };
116 :
117 : /**
118 : * @brief Manipulator for @c setf.
119 : * @param base A numeric base.
120 : *
121 : * Sent to a stream object, this manipulator changes the
122 : * @c ios_base::basefield flags to @c oct, @c dec, or @c hex when @a base
123 : * is 8, 10, or 16, accordingly, and to 0 if @a base is any other value.
124 : */
125 : inline _Setbase
126 : setbase(int __base)
127 : { return { __base }; }
128 :
129 : template<typename _CharT, typename _Traits>
130 : inline basic_istream<_CharT, _Traits>&
131 : operator>>(basic_istream<_CharT, _Traits>& __is, _Setbase __f)
132 : {
133 : __is.setf(__f._M_base == 8 ? ios_base::oct :
134 : __f._M_base == 10 ? ios_base::dec :
135 : __f._M_base == 16 ? ios_base::hex :
136 : ios_base::fmtflags(0), ios_base::basefield);
137 : return __is;
138 : }
139 :
140 : template<typename _CharT, typename _Traits>
141 : inline basic_ostream<_CharT, _Traits>&
142 : operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f)
143 : {
144 : __os.setf(__f._M_base == 8 ? ios_base::oct :
145 : __f._M_base == 10 ? ios_base::dec :
146 : __f._M_base == 16 ? ios_base::hex :
147 : ios_base::fmtflags(0), ios_base::basefield);
148 : return __os;
149 : }
150 :
151 :
152 : template<typename _CharT>
153 : struct _Setfill { _CharT _M_c; };
154 :
155 : /**
156 : * @brief Manipulator for @c fill.
157 : * @param c The new fill character.
158 : *
159 : * Sent to a stream object, this manipulator calls @c fill(c) for that
160 : * object.
161 : */
162 : template<typename _CharT>
163 : inline _Setfill<_CharT>
164 924 : setfill(_CharT __c)
165 924 : { return { __c }; }
166 :
167 : template<typename _CharT, typename _Traits>
168 : inline basic_istream<_CharT, _Traits>&
169 : operator>>(basic_istream<_CharT, _Traits>& __is, _Setfill<_CharT> __f)
170 : {
171 : __is.fill(__f._M_c);
172 : return __is;
173 : }
174 :
175 : template<typename _CharT, typename _Traits>
176 : inline basic_ostream<_CharT, _Traits>&
177 0 : operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f)
178 : {
179 0 : __os.fill(__f._M_c);
180 0 : return __os;
181 : }
182 :
183 :
184 : struct _Setprecision { int _M_n; };
185 :
186 : /**
187 : * @brief Manipulator for @c precision.
188 : * @param n The new precision.
189 : *
190 : * Sent to a stream object, this manipulator calls @c precision(n) for
191 : * that object.
192 : */
193 : inline _Setprecision
194 : setprecision(int __n)
195 : { return { __n }; }
196 :
197 : template<typename _CharT, typename _Traits>
198 : inline basic_istream<_CharT, _Traits>&
199 : operator>>(basic_istream<_CharT, _Traits>& __is, _Setprecision __f)
200 : {
201 : __is.precision(__f._M_n);
202 : return __is;
203 : }
204 :
205 : template<typename _CharT, typename _Traits>
206 : inline basic_ostream<_CharT, _Traits>&
207 : operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f)
208 : {
209 : __os.precision(__f._M_n);
210 : return __os;
211 : }
212 :
213 :
214 : struct _Setw { int _M_n; };
215 :
216 : /**
217 : * @brief Manipulator for @c width.
218 : * @param n The new width.
219 : *
220 : * Sent to a stream object, this manipulator calls @c width(n) for
221 : * that object.
222 : */
223 : inline _Setw
224 924 : setw(int __n)
225 924 : { return { __n }; }
226 :
227 : template<typename _CharT, typename _Traits>
228 : inline basic_istream<_CharT, _Traits>&
229 : operator>>(basic_istream<_CharT, _Traits>& __is, _Setw __f)
230 : {
231 : __is.width(__f._M_n);
232 : return __is;
233 : }
234 :
235 : template<typename _CharT, typename _Traits>
236 : inline basic_ostream<_CharT, _Traits>&
237 0 : operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f)
238 : {
239 0 : __os.width(__f._M_n);
240 0 : return __os;
241 : }
242 :
243 : #ifdef __GXX_EXPERIMENTAL_CXX0X__
244 :
245 : template<typename _MoneyT>
246 : struct _Get_money { _MoneyT& _M_mon; bool _M_intl; };
247 :
248 : /**
249 : * @brief Extended manipulator for extracting money.
250 : * @param mon Either long double or a specialization of @c basic_string.
251 : * @param intl A bool indicating whether international format
252 : * is to be used.
253 : *
254 : * Sent to a stream object, this manipulator extracts @a mon.
255 : */
256 : template<typename _MoneyT>
257 : inline _Get_money<_MoneyT>
258 : get_money(_MoneyT& __mon, bool __intl = false)
259 : { return { __mon, __intl }; }
260 :
261 : template<typename _CharT, typename _Traits, typename _MoneyT>
262 : basic_istream<_CharT, _Traits>&
263 : operator>>(basic_istream<_CharT, _Traits>& __is, _Get_money<_MoneyT> __f)
264 : {
265 : typedef istreambuf_iterator<_CharT, _Traits> _Iter;
266 : typedef money_get<_CharT, _Iter> _MoneyGet;
267 :
268 : ios_base::iostate __err = ios_base::goodbit;
269 : const _MoneyGet& __mg = use_facet<_MoneyGet>(__is.getloc());
270 :
271 : __mg.get(_Iter(__is.rdbuf()), _Iter(), __f._M_intl,
272 : __is, __err, __f._M_mon);
273 :
274 : if (ios_base::goodbit != __err)
275 : __is.setstate(__err);
276 :
277 : return __is;
278 : }
279 :
280 :
281 : template<typename _MoneyT>
282 : struct _Put_money { const _MoneyT& _M_mon; bool _M_intl; };
283 :
284 : /**
285 : * @brief Extended manipulator for inserting money.
286 : * @param mon Either long double or a specialization of @c basic_string.
287 : * @param intl A bool indicating whether international format
288 : * is to be used.
289 : *
290 : * Sent to a stream object, this manipulator inserts @a mon.
291 : */
292 : template<typename _MoneyT>
293 : inline _Put_money<_MoneyT>
294 : put_money(const _MoneyT& __mon, bool __intl = false)
295 : { return { __mon, __intl }; }
296 :
297 : template<typename _CharT, typename _Traits, typename _MoneyT>
298 : basic_ostream<_CharT, _Traits>&
299 : operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f)
300 : {
301 : typedef ostreambuf_iterator<_CharT, _Traits> _Iter;
302 : typedef money_put<_CharT, _Iter> _MoneyPut;
303 :
304 : const _MoneyPut& __mp = use_facet<_MoneyPut>(__os.getloc());
305 : const _Iter __end = __mp.put(_Iter(__os.rdbuf()), __f._M_intl,
306 : __os, __os.fill(), __f._M_mon);
307 :
308 : if (__end.failed())
309 : __os.setstate(ios_base::badbit);
310 :
311 : return __os;
312 : }
313 :
314 : #endif
315 :
316 : // Inhibit implicit instantiations for required instantiations,
317 : // which are defined via explicit instantiations elsewhere.
318 : // NB: This syntax is a GNU extension.
319 : #if _GLIBCXX_EXTERN_TEMPLATE
320 : extern template ostream& operator<<(ostream&, _Setfill<char>);
321 : extern template ostream& operator<<(ostream&, _Setiosflags);
322 : extern template ostream& operator<<(ostream&, _Resetiosflags);
323 : extern template ostream& operator<<(ostream&, _Setbase);
324 : extern template ostream& operator<<(ostream&, _Setprecision);
325 : extern template ostream& operator<<(ostream&, _Setw);
326 : extern template istream& operator>>(istream&, _Setfill<char>);
327 : extern template istream& operator>>(istream&, _Setiosflags);
328 : extern template istream& operator>>(istream&, _Resetiosflags);
329 : extern template istream& operator>>(istream&, _Setbase);
330 : extern template istream& operator>>(istream&, _Setprecision);
331 : extern template istream& operator>>(istream&, _Setw);
332 :
333 : #ifdef _GLIBCXX_USE_WCHAR_T
334 : extern template wostream& operator<<(wostream&, _Setfill<wchar_t>);
335 : extern template wostream& operator<<(wostream&, _Setiosflags);
336 : extern template wostream& operator<<(wostream&, _Resetiosflags);
337 : extern template wostream& operator<<(wostream&, _Setbase);
338 : extern template wostream& operator<<(wostream&, _Setprecision);
339 : extern template wostream& operator<<(wostream&, _Setw);
340 : extern template wistream& operator>>(wistream&, _Setfill<wchar_t>);
341 : extern template wistream& operator>>(wistream&, _Setiosflags);
342 : extern template wistream& operator>>(wistream&, _Resetiosflags);
343 : extern template wistream& operator>>(wistream&, _Setbase);
344 : extern template wistream& operator>>(wistream&, _Setprecision);
345 : extern template wistream& operator>>(wistream&, _Setw);
346 : #endif
347 : #endif
348 :
349 : _GLIBCXX_END_NAMESPACE_VERSION
350 : } // namespace
351 :
352 : #endif /* _GLIBCXX_IOMANIP */
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