1 // TR2 <bool_set> support files -*- C++ -*- 2 3 // Copyright (C) 2009-2013 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 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
