contrib/gcc-8.0/libstdc++-v3/src/c++11/ctype.cc

   1 // Copyright (C) 1997-2018 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // Under Section 7 of GPL version 3, you are granted additional
  15 // permissions described in the GCC Runtime Library Exception, version
  16 // 3.1, as published by the Free Software Foundation.
  17
  18 // You should have received a copy of the GNU General Public License and
  19 // a copy of the GCC Runtime Library Exception along with this program;
  20 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  21 // <http://www.gnu.org/licenses/>.
  22
  23 #include <locale>
  24 #include <cstdlib>
  25 #include <cstring>
  26
  27 namespace std _GLIBCXX_VISIBILITY(default)
  28 {
  29 _GLIBCXX_BEGIN_NAMESPACE_VERSION
  30
  31   // Definitions for static const data members of ctype_base.
  32   const ctype_base::mask ctype_base::space;
  33   const ctype_base::mask ctype_base::print;
  34   const ctype_base::mask ctype_base::cntrl;
  35   const ctype_base::mask ctype_base::upper;
  36   const ctype_base::mask ctype_base::lower;
  37   const ctype_base::mask ctype_base::alpha;
  38   const ctype_base::mask ctype_base::digit;
  39   const ctype_base::mask ctype_base::punct;
  40   const ctype_base::mask ctype_base::xdigit;
  41   const ctype_base::mask ctype_base::alnum;
  42   const ctype_base::mask ctype_base::graph;
  43   const ctype_base::mask ctype_base::blank;
  44
  45   // Definitions for locale::id of standard facets that are specialized.
  46   locale::id ctype<char>::id;
  47
  48 #ifdef _GLIBCXX_USE_WCHAR_T
  49   locale::id ctype<wchar_t>::id;
  50 #endif
  51
  52   const size_t ctype<char>::table_size;
  53
  54   ctype<char>::~ctype()
  55   {
  56     _S_destroy_c_locale(_M_c_locale_ctype);
  57     if (_M_del)
  58       delete[] this->table();
  59   }
  60
  61   // Fill in the narrowing cache and flag whether all values are
  62   // valid or not.  _M_narrow_ok is set to 2 if memcpy can't
  63   // be used.
  64   void
  65   ctype<char>::
  66   _M_narrow_init() const
  67   {
  68     char __tmp[sizeof(_M_narrow)];
  69     for (size_t __i = 0; __i < sizeof(_M_narrow); ++__i)
  70       __tmp[__i] = __i;
  71     do_narrow(__tmp, __tmp + sizeof(__tmp), 0, _M_narrow);
  72
  73     _M_narrow_ok = 1;
  74     if (__builtin_memcmp(__tmp, _M_narrow, sizeof(_M_narrow)))
  75       _M_narrow_ok = 2;
  76     else
  77       {
  78         // Deal with the special case of zero: renarrow with a
  79         // different default and compare.
  80         char __c;
  81         do_narrow(__tmp, __tmp + 1, 1, &__c);
  82         if (__c == 1)
  83           _M_narrow_ok = 2;
  84       }
  85   }
  86
  87   void
  88   ctype<char>::
  89   _M_widen_init() const
  90   {
  91     char __tmp[sizeof(_M_widen)];
  92     for (size_t __i = 0; __i < sizeof(_M_widen); ++__i)
  93       __tmp[__i] = __i;
  94     do_widen(__tmp, __tmp + sizeof(__tmp), _M_widen);
  95
  96     _M_widen_ok = 1;
  97     // Set _M_widen_ok to 2 if memcpy can't be used.
  98     if (__builtin_memcmp(__tmp, _M_widen, sizeof(_M_widen)))
  99       _M_widen_ok = 2;
 100   }
 101
 102 #ifdef _GLIBCXX_USE_WCHAR_T
 103   ctype<wchar_t>::ctype(size_t __refs)
 104   : __ctype_abstract_base<wchar_t>(__refs),
 105   _M_c_locale_ctype(_S_get_c_locale()), _M_narrow_ok(false)
 106   { _M_initialize_ctype(); }
 107
 108   ctype<wchar_t>::ctype(__c_locale __cloc, size_t __refs)
 109   : __ctype_abstract_base<wchar_t>(__refs),
 110   _M_c_locale_ctype(_S_clone_c_locale(__cloc)), _M_narrow_ok(false)
 111   { _M_initialize_ctype(); }
 112
 113   ctype<wchar_t>::~ctype()
 114   { _S_destroy_c_locale(_M_c_locale_ctype); }
 115
 116   ctype_byname<wchar_t>::ctype_byname(const char* __s, size_t __refs)
 117   : ctype<wchar_t>(__refs)
 118   {
 119     if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0)
 120       {
 121         this->_S_destroy_c_locale(this->_M_c_locale_ctype);
 122         this->_S_create_c_locale(this->_M_c_locale_ctype, __s);
 123         this->_M_initialize_ctype();
 124       }
 125   }
 126
 127   ctype_byname<wchar_t>::~ctype_byname()
 128   { }
 129
 130 #endif
 131
 132 _GLIBCXX_END_NAMESPACE_VERSION
 133 } // namespace