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

   1 // std::ctype implementation details, generic version -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
   4 // Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // Under Section 7 of GPL version 3, you are granted additional
  18 // permissions described in the GCC Runtime Library Exception, version
  19 // 3.1, as published by the Free Software Foundation.
  20
  21 // You should have received a copy of the GNU General Public License and
  22 // a copy of the GCC Runtime Library Exception along with this program;
  23 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 // <http://www.gnu.org/licenses/>.
  25
  26 //
  27 // ISO C++ 14882: 22.2.1.1.2  ctype virtual functions.
  28 //
  29
  30 // Written by Benjamin Kosnik <bkoz@redhat.com>
  31
  32 #include <locale>
  33 #include <cstdlib>
  34 #include <cstring>
  35 #include <cstdio>
  36
  37 namespace std _GLIBCXX_VISIBILITY(default)
  38 {
  39 _GLIBCXX_BEGIN_NAMESPACE_VERSION
  40
  41   // NB: The other ctype<char> specializations are in src/locale.cc and
  42   // various /config/os/* files.
  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         this->_S_destroy_c_locale(this->_M_c_locale_ctype);
  49         this->_S_create_c_locale(this->_M_c_locale_ctype, __s);
  50       }
  51   }
  52
  53   ctype_byname<char>::~ctype_byname()
  54   { }
  55
  56 #ifdef _GLIBCXX_USE_WCHAR_T
  57   ctype<wchar_t>::__wmask_type
  58   ctype<wchar_t>::_M_convert_to_wmask(const mask __m) const throw()
  59   {
  60     __wmask_type __ret;
  61     switch (__m)
  62       {
  63       case space:
  64         __ret = wctype("space");
  65         break;
  66       case print:
  67         __ret = wctype("print");
  68         break;
  69       case cntrl:
  70         __ret = wctype("cntrl");
  71         break;
  72       case upper:
  73         __ret = wctype("upper");
  74         break;
  75       case lower:
  76         __ret = wctype("lower");
  77         break;
  78       case alpha:
  79         __ret = wctype("alpha");
  80         break;
  81       case digit:
  82         __ret = wctype("digit");
  83         break;
  84       case punct:
  85         __ret = wctype("punct");
  86         break;
  87       case xdigit:
  88         __ret = wctype("xdigit");
  89         break;
  90       case alnum:
  91         __ret = wctype("alnum");
  92         break;
  93       case graph:
  94         __ret = wctype("graph");
  95         break;
  96       default:
  97         __ret = __wmask_type();
  98       }
  99     return __ret;
 100   };
 101
 102   wchar_t
 103   ctype<wchar_t>::do_toupper(wchar_t __c) const
 104   { return towupper(__c); }
 105
 106   const wchar_t*
 107   ctype<wchar_t>::do_toupper(wchar_t* __lo, const wchar_t* __hi) const
 108   {
 109     while (__lo < __hi)
 110       {
 111         *__lo = towupper(*__lo);
 112         ++__lo;
 113       }
 114     return __hi;
 115   }
 116
 117   wchar_t
 118   ctype<wchar_t>::do_tolower(wchar_t __c) const
 119   { return towlower(__c); }
 120
 121   const wchar_t*
 122   ctype<wchar_t>::do_tolower(wchar_t* __lo, const wchar_t* __hi) const
 123   {
 124     while (__lo < __hi)
 125       {
 126         *__lo = towlower(*__lo);
 127         ++__lo;
 128       }
 129     return __hi;
 130   }
 131
 132   bool
 133   ctype<wchar_t>::
 134   do_is(mask __m, char_type __c) const
 135   {
 136     bool __ret = false;
 137     // Generically, 15 (instead of 10) since we don't know the numerical
 138     // encoding of the various categories in /usr/include/ctype.h.
 139     const size_t __bitmasksize = 15;
 140     for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
 141       if (__m & _M_bit[__bitcur]
 142           && iswctype(__c, _M_wmask[__bitcur]))
 143         {
 144           __ret = true;
 145           break;
 146         }
 147     return __ret;
 148   }
 149
 150   const wchar_t*
 151   ctype<wchar_t>::
 152   do_is(const wchar_t* __lo, const wchar_t* __hi, mask* __vec) const
 153   {
 154     for (;__lo < __hi; ++__vec, ++__lo)
 155       {
 156         // Generically, 15 (instead of 10) since we don't know the numerical
 157         // encoding of the various categories in /usr/include/ctype.h.
 158         const size_t __bitmasksize = 15;
 159         mask __m = 0;
 160         for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
 161           if (iswctype(*__lo, _M_wmask[__bitcur]))
 162             __m |= _M_bit[__bitcur];
 163         *__vec = __m;
 164       }
 165     return __hi;
 166   }
 167
 168   const wchar_t*
 169   ctype<wchar_t>::
 170   do_scan_is(mask __m, const wchar_t* __lo, const wchar_t* __hi) const
 171   {
 172     while (__lo < __hi && !this->do_is(__m, *__lo))
 173       ++__lo;
 174     return __lo;
 175   }
 176
 177   const wchar_t*
 178   ctype<wchar_t>::
 179   do_scan_not(mask __m, const char_type* __lo, const char_type* __hi) const
 180   {
 181     while (__lo < __hi && this->do_is(__m, *__lo) != 0)
 182       ++__lo;
 183     return __lo;
 184   }
 185
 186   wchar_t
 187   ctype<wchar_t>::
 188   do_widen(char __c) const
 189   { return _M_widen[static_cast<unsigned char>(__c)]; }
 190
 191   const char*
 192   ctype<wchar_t>::
 193   do_widen(const char* __lo, const char* __hi, wchar_t* __dest) const
 194   {
 195     while (__lo < __hi)
 196       {
 197         *__dest = _M_widen[static_cast<unsigned char>(*__lo)];
 198         ++__lo;
 199         ++__dest;
 200       }
 201     return __hi;
 202   }
 203
 204   char
 205   ctype<wchar_t>::
 206   do_narrow(wchar_t __wc, char __dfault) const
 207   {
 208     if (__wc >= 0 && __wc < 128 && _M_narrow_ok)
 209       return _M_narrow[__wc];
 210     const int __c = wctob(__wc);
 211     return (__c == EOF ? __dfault : static_cast<char>(__c));
 212   }
 213
 214   const wchar_t*
 215   ctype<wchar_t>::
 216   do_narrow(const wchar_t* __lo, const wchar_t* __hi, char __dfault,
 217             char* __dest) const
 218   {
 219     if (_M_narrow_ok)
 220       while (__lo < __hi)
 221         {
 222           if (*__lo >= 0 && *__lo < 128)
 223             *__dest = _M_narrow[*__lo];
 224           else
 225             {
 226               const int __c = wctob(*__lo);
 227               *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
 228             }
 229           ++__lo;
 230           ++__dest;
 231         }
 232     else
 233       while (__lo < __hi)
 234         {
 235           const int __c = wctob(*__lo);
 236           *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
 237           ++__lo;
 238           ++__dest;
 239         }
 240     return __hi;
 241   }
 242
 243   void
 244   ctype<wchar_t>::_M_initialize_ctype() throw()
 245   {
 246     wint_t __i;
 247     for (__i = 0; __i < 128; ++__i)
 248       {
 249         const int __c = wctob(__i);
 250         if (__c == EOF)
 251           break;
 252         else
 253           _M_narrow[__i] = static_cast<char>(__c);
 254       }
 255     if (__i == 128)
 256       _M_narrow_ok = true;
 257     else
 258       _M_narrow_ok = false;
 259     for (size_t __i = 0;
 260          __i < sizeof(_M_widen) / sizeof(wint_t); ++__i)
 261       _M_widen[__i] = btowc(__i);
 262
 263     for (size_t __i = 0; __i <= 15; ++__i)
 264       {
 265         _M_bit[__i] = static_cast<mask>(1 << __i);
 266         _M_wmask[__i] = _M_convert_to_wmask(_M_bit[__i]);
 267       }
 268   }
 269 #endif //  _GLIBCXX_USE_WCHAR_T
 270
 271 _GLIBCXX_END_NAMESPACE_VERSION
 272 } // namespace