1 // TR2 <bool_set> support files -*- C++ -*-
2 
3 // Copyright (C) 2009, 2011 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 tr2/bool_set.tcc
26  *  This is a TR2 C++ Library header.
27  */
28 
29 #ifndef _GLIBCXX_TR2_BOOL_SET_TCC
30 #define _GLIBCXX_TR2_BOOL_SET_TCC 1
31 
32 #pragma GCC system_header
33 
34 namespace std _GLIBCXX_VISIBILITY(default)
35 {
36 namespace tr2
37 {
38 _GLIBCXX_BEGIN_NAMESPACE_VERSION
39 
40   bool_set::_Bool_set_val
41   bool_set::_S_not[4] =
42   { _S_true_, _S_false, _S_indet, _S_empty };
43 
44   bool_set::_Bool_set_val
45   bool_set::_S_xor[4][4] =
46   { { _S_false, _S_true_, _S_indet, _S_empty },
47     { _S_true_, _S_false, _S_indet, _S_empty },
48     { _S_indet, _S_indet, _S_indet, _S_empty },
49     { _S_empty, _S_empty, _S_empty, _S_empty } };
50 
51   bool_set::_Bool_set_val
52   bool_set::_S_or[4][4] =
53   { { _S_false, _S_true_, _S_indet, _S_empty },
54     { _S_true_, _S_true_, _S_true_, _S_empty },
55     { _S_indet, _S_true_, _S_indet, _S_empty },
56     { _S_empty, _S_empty, _S_empty, _S_empty } };
57 
58   bool_set::_Bool_set_val
59   bool_set::_S_and[4][4] =
60   { { _S_false, _S_false, _S_false, _S_empty },
61     { _S_false, _S_true_, _S_indet, _S_empty },
62     { _S_false, _S_indet, _S_indet, _S_empty },
63     { _S_empty, _S_empty, _S_empty, _S_empty } };
64 
65   bool_set::_Bool_set_val
66   bool_set::_S_eq[4][4] =
67   { { _S_true_, _S_false, _S_indet, _S_empty },
68     { _S_false, _S_true_, _S_indet, _S_empty },
69     { _S_indet, _S_indet, _S_indet, _S_empty },
70     { _S_empty, _S_empty, _S_empty, _S_empty } };
71 
72 _GLIBCXX_END_NAMESPACE_VERSION
73 }
74 }
75 
76 //  I object to these things.
77 //  The stuff in locale facets are for basic types.
78 //  I think we could hack operator<< and operator>>.
79 
80       /**
81        *  @brief  Numeric parsing.
82        *
83        *  Parses the input stream into the bool @a v.  It does so by calling
84        *  num_get::do_get().
85        *
86        *  If ios_base::boolalpha is set, attempts to read
87        *  ctype<CharT>::truename() or ctype<CharT>::falsename().  Sets
88        *  @a v to true or false if successful.  Sets err to
89        *  ios_base::failbit if reading the string fails.  Sets err to
90        *  ios_base::eofbit if the stream is emptied.
91        *
92        *  If ios_base::boolalpha is not set, proceeds as with reading a long,
93        *  except if the value is 1, sets @a v to true, if the value is 0, sets
94        *  @a v to false, and otherwise set err to ios_base::failbit.
95        *
96        *  @param  in  Start of input stream.
97        *  @param  end  End of input stream.
98        *  @param  io  Source of locale and flags.
99        *  @param  err  Error flags to set.
100        *  @param  v  Value to format and insert.
101        *  @return  Iterator after reading.
102       iter_type
103       get(iter_type __in, iter_type __end, ios_base& __io,
104 	  ios_base::iostate& __err, bool& __v) const
105       { return this->do_get(__in, __end, __io, __err, __v); }
106        */
107 /*
108   template<typename _CharT, typename _InIter>
109     _InIter
110     num_get<_CharT, _InIter>::
111     do_get(iter_type __beg, iter_type __end, ios_base& __io,
112 	   ios_base::iostate& __err, bool_set& __v) const
113     {
114       if (!(__io.flags() & ios_base::boolalpha))
115 	{
116 	  // Parse bool values as long.
117 	  // NB: We can't just call do_get(long) here, as it might
118 	  // refer to a derived class.
119 	  long __l = -1;
120 	  __beg = _M_extract_int(__beg, __end, __io, __err, __l);
121 	  if (__c >= _S_false && __c < _S_empty)
122 	    __b._M_b = static_cast<_Bool_set_val>(__c);
123 	  else
124 	    {
125 	      // What should we do here?
126 	      __v = true;
127 	      __err = ios_base::failbit;
128 	      if (__beg == __end)
129 		__err |= ios_base::eofbit;
130 	    }
131 	}
132       else
133 	{
134 	  // Parse bool values as alphanumeric.
135 	  typedef __numpunct_cache<_CharT>  __cache_type;
136 	  __use_cache<__cache_type> __uc;
137 	  const locale& __loc = __io._M_getloc();
138 	  const __cache_type* __lc = __uc(__loc);
139 
140 	  bool __testf = true;
141 	  bool __testt = true;
142 	  bool __donef = __lc->_M_falsename_size == 0;
143 	  bool __donet = __lc->_M_truename_size == 0;
144 	  bool __testeof = false;
145 	  size_t __n = 0;
146 	  while (!__donef || !__donet)
147 	    {
148 	      if (__beg == __end)
149 		{
150 		  __testeof = true;
151 		  break;
152 		}
153 
154 	      const char_type __c = *__beg;
155 
156 	      if (!__donef)
157 		__testf = __c == __lc->_M_falsename[__n];
158 
159 	      if (!__testf && __donet)
160 		break;
161 
162 	      if (!__donet)
163 		__testt = __c == __lc->_M_truename[__n];
164 
165 	      if (!__testt && __donef)
166 		break;
167 
168 	      if (!__testt && !__testf)
169 		break;
170 
171 	      ++__n;
172 	      ++__beg;
173 
174 	      __donef = !__testf || __n >= __lc->_M_falsename_size;
175 	      __donet = !__testt || __n >= __lc->_M_truename_size;
176 	    }
177 	  if (__testf && __n == __lc->_M_falsename_size && __n)
178 	    {
179 	      __v = false;
180 	      if (__testt && __n == __lc->_M_truename_size)
181 		__err = ios_base::failbit;
182 	      else
183 		__err = __testeof ? ios_base::eofbit : ios_base::goodbit;
184 	    }
185 	  else if (__testt && __n == __lc->_M_truename_size && __n)
186 	    {
187 	      __v = true;
188 	      __err = __testeof ? ios_base::eofbit : ios_base::goodbit;
189 	    }
190 	  else
191 	    {
192 	      // _GLIBCXX_RESOLVE_LIB_DEFECTS
193 	      // 23. Num_get overflow result.
194 	      __v = false;
195 	      __err = ios_base::failbit;
196 	      if (__testeof)
197 		__err |= ios_base::eofbit;
198 	    }
199 	}
200       return __beg;
201     }
202 */
203 
204       /**
205        *  @brief  Numeric formatting.
206        *
207        *  Formats the boolean @a v and inserts it into a stream.  It does so
208        *  by calling num_put::do_put().
209        *
210        *  If ios_base::boolalpha is set, writes ctype<CharT>::truename() or
211        *  ctype<CharT>::falsename().  Otherwise formats @a v as an int.
212        *
213        *  @param  s  Stream to write to.
214        *  @param  io  Source of locale and flags.
215        *  @param  fill  Char_type to use for filling.
216        *  @param  v  Value to format and insert.
217        *  @return  Iterator after writing.
218       iter_type
219       put(iter_type __s, ios_base& __f, char_type __fill, bool __v) const
220       { return this->do_put(__s, __f, __fill, __v); }
221        */
222 
223 /*
224   template<typename _CharT, typename _OutIter>
225     _OutIter
226     num_put<_CharT, _OutIter>::
227     do_put(iter_type __s, ios_base& __io, char_type __fill, bool_set __v) const
228     {
229       const ios_base::fmtflags __flags = __io.flags();
230       if ((__flags & ios_base::boolalpha) == 0)
231 	{
232 	  const long __l = __v;
233 	  __s = _M_insert_int(__s, __io, __fill, __l);
234 	}
235       else
236 	{
237 	  typedef __numpunct_cache<_CharT> __cache_type;
238 	  __use_cache<__cache_type> __uc;
239 	  const locale& __loc = __io._M_getloc();
240 	  const __cache_type* __lc = __uc(__loc);
241 
242 	  const _CharT* __name = __v ? __lc->_M_truename
243 				     : __lc->_M_falsename;
244 	  int __len = __v ? __lc->_M_truename_size
245 			  : __lc->_M_falsename_size;
246 
247 	  const streamsize __w = __io.width();
248 	  if (__w > static_cast<streamsize>(__len))
249 	    {
250 	      const streamsize __plen = __w - __len;
251 	      _CharT* __ps
252 		= static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
253 							* __plen));
254 
255 	      char_traits<_CharT>::assign(__ps, __plen, __fill);
256 	      __io.width(0);
257 
258 	      if ((__flags & ios_base::adjustfield) == ios_base::left)
259 		{
260 		  __s = std::__write(__s, __name, __len);
261 		  __s = std::__write(__s, __ps, __plen);
262 		}
263 	      else
264 		{
265 		  __s = std::__write(__s, __ps, __plen);
266 		  __s = std::__write(__s, __name, __len);
267 		}
268 	      return __s;
269 	    }
270 	  __io.width(0);
271 	  __s = std::__write(__s, __name, __len);
272 	}
273       return __s;
274     }
275 */
276 
277 #endif // _GLIBCXX_TR2_BOOL_SET_TCC
278