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
   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 2, 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 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  21
  22 // As a special exception, you may use this file as part of a free software
  23 // library without restriction.  Specifically, if other files instantiate
  24 // templates or use macros or inline functions from this file, or you compile
  25 // this file and link it with other files to produce an executable, this
  26 // file does not by itself cause the resulting executable to be covered by
  27 // the GNU General Public License.  This exception does not however
  28 // invalidate any other reasons why the executable file might be covered by
  29 // the GNU General Public License.
  30
  31 //
  32 // ISO C++ 14882: 22.2.1.1.2  ctype virtual functions.
  33 //
  34
  35 // Written by Benjamin Kosnik <bkoz@redhat.com>
  36
  37 #include <locale>
  38 #include <cstdlib>
  39 #include <cstring>
  40 #include <cstdio>
  41
  42 _GLIBCXX_BEGIN_NAMESPACE(std)
  43
  44   // NB: The other ctype<char> specializations are in src/locale.cc and
  45   // various /config/os/* files.
  46   ctype_byname<char>::ctype_byname(const char* __s, size_t __refs)
  47   : ctype<char>(0, false, __refs)
  48   {
  49     if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0)
  50       {
  51         this->_S_destroy_c_locale(this->_M_c_locale_ctype);
  52         this->_S_create_c_locale(this->_M_c_locale_ctype, __s);
  53       }
  54   }
  55
  56   ctype_byname<char>::~ctype_byname()
  57   { }
  58
  59 #ifdef _GLIBCXX_USE_WCHAR_T
  60   ctype<wchar_t>::__wmask_type
  61   ctype<wchar_t>::_M_convert_to_wmask(const mask __m) const
  62   {
  63     __wmask_type __ret;
  64     switch (__m)
  65       {
  66       case space:
  67         __ret = wctype("space");
  68         break;
  69       case print:
  70         __ret = wctype("print");
  71         break;
  72       case cntrl:
  73         __ret = wctype("cntrl");
  74         break;
  75       case upper:
  76         __ret = wctype("upper");
  77         break;
  78       case lower:
  79         __ret = wctype("lower");
  80         break;
  81       case alpha:
  82         __ret = wctype("alpha");
  83         break;
  84       case digit:
  85         __ret = wctype("digit");
  86         break;
  87       case punct:
  88         __ret = wctype("punct");
  89         break;
  90       case xdigit:
  91         __ret = wctype("xdigit");
  92         break;
  93       case alnum:
  94         __ret = wctype("alnum");
  95         break;
  96       case graph:
  97         __ret = wctype("graph");
  98         break;
  99       default:
 100         __ret = __wmask_type();
 101       }
 102     return __ret;
 103   };
 104
 105   wchar_t
 106   ctype<wchar_t>::do_toupper(wchar_t __c) const
 107   { return towupper(__c); }
 108
 109   const wchar_t*
 110   ctype<wchar_t>::do_toupper(wchar_t* __lo, const wchar_t* __hi) const
 111   {
 112     while (__lo < __hi)
 113       {
 114         *__lo = towupper(*__lo);
 115         ++__lo;
 116       }
 117     return __hi;
 118   }
 119
 120   wchar_t
 121   ctype<wchar_t>::do_tolower(wchar_t __c) const
 122   { return towlower(__c); }
 123
 124   const wchar_t*
 125   ctype<wchar_t>::do_tolower(wchar_t* __lo, const wchar_t* __hi) const
 126   {
 127     while (__lo < __hi)
 128       {
 129         *__lo = towlower(*__lo);
 130         ++__lo;
 131       }
 132     return __hi;
 133   }
 134
 135   bool
 136   ctype<wchar_t>::
 137   do_is(mask __m, char_type __c) const
 138   {
 139     bool __ret = false;
 140     // Generically, 15 (instead of 10) since we don't know the numerical
 141     // encoding of the various categories in /usr/include/ctype.h.
 142     const size_t __bitmasksize = 15;
 143     for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
 144       if (__m & _M_bit[__bitcur]
 145           && iswctype(__c, _M_wmask[__bitcur]))
 146         {
 147           __ret = true;
 148           break;
 149         }
 150     return __ret;
 151   }
 152
 153   const wchar_t*
 154   ctype<wchar_t>::
 155   do_is(const wchar_t* __lo, const wchar_t* __hi, mask* __vec) const
 156   {
 157     for (;__lo < __hi; ++__vec, ++__lo)
 158       {
 159         // Generically, 15 (instead of 10) since we don't know the numerical
 160         // encoding of the various categories in /usr/include/ctype.h.
 161         const size_t __bitmasksize = 15;
 162         mask __m = 0;
 163         for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
 164           if (iswctype(*__lo, _M_wmask[__bitcur]))
 165             __m |= _M_bit[__bitcur];
 166         *__vec = __m;
 167       }
 168     return __hi;
 169   }
 170
 171   const wchar_t*
 172   ctype<wchar_t>::
 173   do_scan_is(mask __m, const wchar_t* __lo, const wchar_t* __hi) const
 174   {
 175     while (__lo < __hi && !this->do_is(__m, *__lo))
 176       ++__lo;
 177     return __lo;
 178   }
 179
 180   const wchar_t*
 181   ctype<wchar_t>::
 182   do_scan_not(mask __m, const char_type* __lo, const char_type* __hi) const
 183   {
 184     while (__lo < __hi && this->do_is(__m, *__lo) != 0)
 185       ++__lo;
 186     return __lo;
 187   }
 188
 189   wchar_t
 190   ctype<wchar_t>::
 191   do_widen(char __c) const
 192   { return _M_widen[static_cast<unsigned char>(__c)]; }
 193
 194   const char*
 195   ctype<wchar_t>::
 196   do_widen(const char* __lo, const char* __hi, wchar_t* __dest) const
 197   {
 198     while (__lo < __hi)
 199       {
 200         *__dest = _M_widen[static_cast<unsigned char>(*__lo)];
 201         ++__lo;
 202         ++__dest;
 203       }
 204     return __hi;
 205   }
 206
 207   char
 208   ctype<wchar_t>::
 209   do_narrow(wchar_t __wc, char __dfault) const
 210   {
 211     if (__wc >= 0 && __wc < 128 && _M_narrow_ok)
 212       return _M_narrow[__wc];
 213     const int __c = wctob(__wc);
 214     return (__c == EOF ? __dfault : static_cast<char>(__c));
 215   }
 216
 217   const wchar_t*
 218   ctype<wchar_t>::
 219   do_narrow(const wchar_t* __lo, const wchar_t* __hi, char __dfault,
 220             char* __dest) const
 221   {
 222     if (_M_narrow_ok)
 223       while (__lo < __hi)
 224         {
 225           if (*__lo >= 0 && *__lo < 128)
 226             *__dest = _M_narrow[*__lo];
 227           else
 228             {
 229               const int __c = wctob(*__lo);
 230               *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
 231             }
 232           ++__lo;
 233           ++__dest;
 234         }
 235     else
 236       while (__lo < __hi)
 237         {
 238           const int __c = wctob(*__lo);
 239           *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
 240           ++__lo;
 241           ++__dest;
 242         }
 243     return __hi;
 244   }
 245
 246   void
 247   ctype<wchar_t>::_M_initialize_ctype()
 248   {
 249     wint_t __i;
 250     for (__i = 0; __i < 128; ++__i)
 251       {
 252         const int __c = wctob(__i);
 253         if (__c == EOF)
 254           break;
 255         else
 256           _M_narrow[__i] = static_cast<char>(__c);
 257       }
 258     if (__i == 128)
 259       _M_narrow_ok = true;
 260     else
 261       _M_narrow_ok = false;
 262     for (size_t __i = 0;
 263          __i < sizeof(_M_widen) / sizeof(wint_t); ++__i)
 264       _M_widen[__i] = btowc(__i);
 265
 266     for (size_t __i = 0; __i <= 15; ++__i)
 267       {
 268         _M_bit[__i] = static_cast<mask>(1 << __i);
 269         _M_wmask[__i] = _M_convert_to_wmask(_M_bit[__i]);
 270       }
 271   }
 272 #endif //  _GLIBCXX_USE_WCHAR_T
 273
 274 _GLIBCXX_END_NAMESPACE