libstdc++-v3/src/ctype.cc

   1 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2005,
   2 // 2006, 2007, 2008, 2009, 2010, 2011
   3 // 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 #include <locale>
  26 #include <cstdlib>
  27 #include <cstring>
  28
  29 namespace std _GLIBCXX_VISIBILITY(default)
  30 {
  31 _GLIBCXX_BEGIN_NAMESPACE_VERSION
  32
  33   // Definitions for static const data members of ctype_base.
  34   const ctype_base::mask ctype_base::space;
  35   const ctype_base::mask ctype_base::print;
  36   const ctype_base::mask ctype_base::cntrl;
  37   const ctype_base::mask ctype_base::upper;
  38   const ctype_base::mask ctype_base::lower;
  39   const ctype_base::mask ctype_base::alpha;
  40   const ctype_base::mask ctype_base::digit;
  41   const ctype_base::mask ctype_base::punct;
  42   const ctype_base::mask ctype_base::xdigit;
  43   const ctype_base::mask ctype_base::alnum;
  44   const ctype_base::mask ctype_base::graph;
  45
  46   // Definitions for locale::id of standard facets that are specialized.
  47   locale::id ctype<char>::id;
  48
  49 #ifdef _GLIBCXX_USE_WCHAR_T
  50   locale::id ctype<wchar_t>::id;
  51 #endif
  52
  53   const size_t ctype<char>::table_size;
  54
  55   ctype<char>::~ctype()
  56   {
  57     _S_destroy_c_locale(_M_c_locale_ctype);
  58     if (_M_del)
  59       delete[] this->table();
  60   }
  61
  62   // Fill in the narrowing cache and flag whether all values are
  63   // valid or not.  _M_narrow_ok is set to 2 if memcpy can't
  64   // be used.
  65   void
  66   ctype<char>::
  67   _M_narrow_init() const
  68   {
  69     char __tmp[sizeof(_M_narrow)];
  70     for (size_t __i = 0; __i < sizeof(_M_narrow); ++__i)
  71       __tmp[__i] = __i;
  72     do_narrow(__tmp, __tmp + sizeof(__tmp), 0, _M_narrow);
  73
  74     _M_narrow_ok = 1;
  75     if (__builtin_memcmp(__tmp, _M_narrow, sizeof(_M_narrow)))
  76       _M_narrow_ok = 2;
  77     else
  78       {
  79         // Deal with the special case of zero: renarrow with a
  80         // different default and compare.
  81         char __c;
  82         do_narrow(__tmp, __tmp + 1, 1, &__c);
  83         if (__c == 1)
  84           _M_narrow_ok = 2;
  85       }
  86   }
  87
  88   void
  89   ctype<char>::
  90   _M_widen_init() const
  91   {
  92     char __tmp[sizeof(_M_widen)];
  93     for (size_t __i = 0; __i < sizeof(_M_widen); ++__i)
  94       __tmp[__i] = __i;
  95     do_widen(__tmp, __tmp + sizeof(__tmp), _M_widen);
  96
  97     _M_widen_ok = 1;
  98     // Set _M_widen_ok to 2 if memcpy can't be used.
  99     if (__builtin_memcmp(__tmp, _M_widen, sizeof(_M_widen)))
 100       _M_widen_ok = 2;
 101   }
 102
 103 #ifdef _GLIBCXX_USE_WCHAR_T
 104   ctype<wchar_t>::ctype(size_t __refs)
 105   : __ctype_abstract_base<wchar_t>(__refs),
 106   _M_c_locale_ctype(_S_get_c_locale()), _M_narrow_ok(false)
 107   { _M_initialize_ctype(); }
 108
 109   ctype<wchar_t>::ctype(__c_locale __cloc, size_t __refs)
 110   : __ctype_abstract_base<wchar_t>(__refs),
 111   _M_c_locale_ctype(_S_clone_c_locale(__cloc)), _M_narrow_ok(false)
 112   { _M_initialize_ctype(); }
 113
 114   ctype<wchar_t>::~ctype()
 115   { _S_destroy_c_locale(_M_c_locale_ctype); }
 116
 117   ctype_byname<wchar_t>::ctype_byname(const char* __s, size_t __refs)
 118   : ctype<wchar_t>(__refs)
 119   {
 120     if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0)
 121       {
 122         this->_S_destroy_c_locale(this->_M_c_locale_ctype);
 123         this->_S_create_c_locale(this->_M_c_locale_ctype, __s);
 124         this->_M_initialize_ctype();
 125       }
 126   }
 127
 128   ctype_byname<wchar_t>::~ctype_byname()
 129   { }
 130
 131 #endif
 132
 133 _GLIBCXX_END_NAMESPACE_VERSION
 134 } // namespace