libstdc++-v3/config/locale/generic/ctype_members.cc

   1 // std::ctype implementation details, generic version -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2002, 2003 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 2, 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 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 //
  31 // ISO C++ 14882: 22.2.1.1.2  ctype virtual functions.
  32 //
  33
  34 // Written by Benjamin Kosnik <bkoz@redhat.com>
  35
  36 #include <locale>
  37
  38 namespace std
  39 {
  40   // NB: The other ctype<char> specializations are in src/locale.cc and
  41   // various /config/os/* files.
  42   template<>
  43     ctype_byname<char>::ctype_byname(const char* __s, size_t __refs)
  44     : ctype<char>(0, false, __refs)
  45     {
  46       if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0)
  47         {
  48           _S_destroy_c_locale(_M_c_locale_ctype);
  49           _S_create_c_locale(_M_c_locale_ctype, __s);
  50         }
  51     }
  52
  53 #ifdef _GLIBCXX_USE_WCHAR_T
  54   ctype<wchar_t>::__wmask_type
  55   ctype<wchar_t>::_M_convert_to_wmask(const mask __m) const
  56   {
  57     __wmask_type __ret;
  58     switch (__m)
  59       {
  60       case space:
  61         __ret = wctype("space");
  62         break;
  63       case print:
  64         __ret = wctype("print");
  65         break;
  66       case cntrl:
  67         __ret = wctype("cntrl");
  68         break;
  69       case upper:
  70         __ret = wctype("upper");
  71         break;
  72       case lower:
  73         __ret = wctype("lower");
  74         break;
  75       case alpha:
  76         __ret = wctype("alpha");
  77         break;
  78       case digit:
  79         __ret = wctype("digit");
  80         break;
  81       case punct:
  82         __ret = wctype("punct");
  83         break;
  84       case xdigit:
  85         __ret = wctype("xdigit");
  86         break;
  87       case alnum:
  88         __ret = wctype("alnum");
  89         break;
  90       case graph:
  91         __ret = wctype("graph");
  92         break;
  93       default:
  94         __ret = 0;
  95       }
  96     return __ret;
  97   };
  98
  99   wchar_t
 100   ctype<wchar_t>::do_toupper(wchar_t __c) const
 101   { return towupper(__c); }
 102
 103   const wchar_t*
 104   ctype<wchar_t>::do_toupper(wchar_t* __lo, const wchar_t* __hi) const
 105   {
 106     while (__lo < __hi)
 107       {
 108         *__lo = towupper(*__lo);
 109         ++__lo;
 110       }
 111     return __hi;
 112   }
 113
 114   wchar_t
 115   ctype<wchar_t>::do_tolower(wchar_t __c) const
 116   { return towlower(__c); }
 117
 118   const wchar_t*
 119   ctype<wchar_t>::do_tolower(wchar_t* __lo, const wchar_t* __hi) const
 120   {
 121     while (__lo < __hi)
 122       {
 123         *__lo = towlower(*__lo);
 124         ++__lo;
 125       }
 126     return __hi;
 127   }
 128
 129   bool
 130   ctype<wchar_t>::
 131   do_is(mask __m, char_type __c) const
 132   {
 133     bool __ret = false;
 134     // Generically, 15 (instead of 10) since we don't know the numerical
 135     // encoding of the various categories in /usr/include/ctype.h.
 136     const size_t __bitmasksize = 15;
 137     for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
 138       {
 139         const mask __bit = static_cast<mask>(1 << __bitcur);
 140         if (__m & __bit)
 141           __ret |= iswctype(__c, _M_convert_to_wmask(__bit));
 142       }
 143     return __ret;
 144   }
 145
 146   const wchar_t*
 147   ctype<wchar_t>::
 148   do_is(const wchar_t* __lo, const wchar_t* __hi, mask* __vec) const
 149   {
 150     for (;__lo < __hi; ++__vec, ++__lo)
 151       {
 152         // Generically, 15 (instead of 10) since we don't know the numerical
 153         // encoding of the various categories in /usr/include/ctype.h.
 154         const size_t __bitmasksize = 15;
 155         mask __m = 0;
 156         for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
 157           {
 158             const mask __bit = static_cast<mask>(1 << __bitcur);
 159             if (iswctype(*__lo, _M_convert_to_wmask(__bit)))
 160               __m |= __bit;
 161           }
 162         *__vec = __m;
 163       }
 164     return __hi;
 165   }
 166
 167   const wchar_t*
 168   ctype<wchar_t>::
 169   do_scan_is(mask __m, const wchar_t* __lo, const wchar_t* __hi) const
 170   {
 171     while (__lo < __hi && !this->do_is(__m, *__lo))
 172       ++__lo;
 173     return __lo;
 174   }
 175
 176   const wchar_t*
 177   ctype<wchar_t>::
 178   do_scan_not(mask __m, const char_type* __lo, const char_type* __hi) const
 179   {
 180     while (__lo < __hi && this->do_is(__m, *__lo) != 0)
 181       ++__lo;
 182     return __lo;
 183   }
 184
 185   wchar_t
 186   ctype<wchar_t>::
 187   do_widen(char __c) const
 188   {
 189     const unsigned char __uc = static_cast<unsigned char>(__c);
 190     if (__uc < 128)
 191       return _M_widen[__uc];
 192     return btowc(__uc);
 193   }
 194
 195   const char*
 196   ctype<wchar_t>::
 197   do_widen(const char* __lo, const char* __hi, wchar_t* __dest) const
 198   {
 199     while (__lo < __hi)
 200       {
 201         const unsigned char __uc = static_cast<unsigned char>(*__lo);
 202         if (__uc < 128)
 203           *__dest = _M_widen[__uc];
 204         else
 205           *__dest = btowc(__uc);
 206         ++__lo;
 207         ++__dest;
 208       }
 209     return __hi;
 210   }
 211
 212   char
 213   ctype<wchar_t>::
 214   do_narrow(wchar_t __wc, char __dfault) const
 215   {
 216     if (__wc >= 0 && __wc < 128 && _M_narrow_ok)
 217       return _M_narrow[__wc];
 218     const int __c = wctob(__wc);
 219     return (__c == EOF ? __dfault : static_cast<char>(__c));
 220   }
 221
 222   const wchar_t*
 223   ctype<wchar_t>::
 224   do_narrow(const wchar_t* __lo, const wchar_t* __hi, char __dfault,
 225             char* __dest) const
 226   {
 227     if (_M_narrow_ok)
 228       while (__lo < __hi)
 229         {
 230           if (*__lo >= 0 && *__lo < 128)
 231             *__dest = _M_narrow[*__lo];
 232           else
 233             {
 234               const int __c = wctob(*__lo);
 235               *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
 236             }
 237           ++__lo;
 238           ++__dest;
 239         }
 240     else
 241       while (__lo < __hi)
 242         {
 243           const int __c = wctob(*__lo);
 244           *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
 245           ++__lo;
 246           ++__dest;
 247         }
 248     return __hi;
 249   }
 250
 251   void
 252   ctype<wchar_t>::_M_initialize_ctype()
 253   {
 254     wint_t __i;
 255     for (__i = 0; __i < 128; ++__i)
 256       {
 257         const int __c = wctob(__i);
 258         if (__c == EOF)
 259           break;
 260         else
 261           _M_narrow[__i] = static_cast<char>(__c);
 262       }
 263     if (__i == 128)
 264       _M_narrow_ok = true;
 265     else
 266       _M_narrow_ok = false;
 267     for (int __i = 0; __i < 128; ++__i)
 268       _M_widen[__i] = btowc(__i);
 269   }
 270 #endif //  _GLIBCXX_USE_WCHAR_T
 271 }