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

   1 // std::ctype implementation details, GNU 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 #include <bits/c++locale_internal.h>
  38
  39 namespace std
  40 {
  41   // NB: The other ctype<char> specializations are in src/locale.cc and
  42   // various /config/os/* files.
  43   template<>
  44     ctype_byname<char>::ctype_byname(const char* __s, size_t __refs)
  45     : ctype<char>(0, false, __refs)
  46     {
  47       if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0)
  48         {
  49           _S_destroy_c_locale(_M_c_locale_ctype);
  50           _S_create_c_locale(_M_c_locale_ctype, __s);
  51           _M_toupper = _M_c_locale_ctype->__ctype_toupper;
  52           _M_tolower = _M_c_locale_ctype->__ctype_tolower;
  53           _M_table = _M_c_locale_ctype->__ctype_b;
  54         }
  55     }
  56
  57 #ifdef _GLIBCXX_USE_WCHAR_T
  58   ctype<wchar_t>::__wmask_type
  59   ctype<wchar_t>::_M_convert_to_wmask(const mask __m) const
  60   {
  61     __wmask_type __ret;
  62     switch (__m)
  63       {
  64       case space:
  65         __ret = __wctype_l("space", _M_c_locale_ctype);
  66         break;
  67       case print:
  68         __ret = __wctype_l("print", _M_c_locale_ctype);
  69         break;
  70       case cntrl:
  71         __ret = __wctype_l("cntrl", _M_c_locale_ctype);
  72         break;
  73       case upper:
  74         __ret = __wctype_l("upper", _M_c_locale_ctype);
  75         break;
  76       case lower:
  77         __ret = __wctype_l("lower", _M_c_locale_ctype);
  78         break;
  79       case alpha:
  80         __ret = __wctype_l("alpha", _M_c_locale_ctype);
  81         break;
  82       case digit:
  83         __ret = __wctype_l("digit", _M_c_locale_ctype);
  84         break;
  85       case punct:
  86         __ret = __wctype_l("punct", _M_c_locale_ctype);
  87         break;
  88       case xdigit:
  89         __ret = __wctype_l("xdigit", _M_c_locale_ctype);
  90         break;
  91       case alnum:
  92         __ret = __wctype_l("alnum", _M_c_locale_ctype);
  93         break;
  94       case graph:
  95         __ret = __wctype_l("graph", _M_c_locale_ctype);
  96         break;
  97       default:
  98         __ret = 0;
  99       }
 100     return __ret;
 101   }
 102
 103   wchar_t
 104   ctype<wchar_t>::do_toupper(wchar_t __c) const
 105   { return __towupper_l(__c, _M_c_locale_ctype); }
 106
 107   const wchar_t*
 108   ctype<wchar_t>::do_toupper(wchar_t* __lo, const wchar_t* __hi) const
 109   {
 110     while (__lo < __hi)
 111       {
 112         *__lo = __towupper_l(*__lo, _M_c_locale_ctype);
 113         ++__lo;
 114       }
 115     return __hi;
 116   }
 117
 118   wchar_t
 119   ctype<wchar_t>::do_tolower(wchar_t __c) const
 120   { return __towlower_l(__c, _M_c_locale_ctype); }
 121
 122   const wchar_t*
 123   ctype<wchar_t>::do_tolower(wchar_t* __lo, const wchar_t* __hi) const
 124   {
 125     while (__lo < __hi)
 126       {
 127         *__lo = __towlower_l(*__lo, _M_c_locale_ctype);
 128         ++__lo;
 129       }
 130     return __hi;
 131   }
 132
 133   bool
 134   ctype<wchar_t>::
 135   do_is(mask __m, wchar_t __c) const
 136   {
 137     // Highest bitmask in ctype_base == 10, but extra in "C"
 138     // library for blank.
 139     bool __ret = false;
 140     const size_t __bitmasksize = 11;
 141     for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
 142       if (__m & _M_bit[__bitcur]
 143           && __iswctype_l(__c, _M_wmask[__bitcur], _M_c_locale_ctype))
 144         {
 145           __ret = true;
 146           break;
 147         }
 148     return __ret;
 149   }
 150
 151   const wchar_t*
 152   ctype<wchar_t>::
 153   do_is(const wchar_t* __lo, const wchar_t* __hi, mask* __vec) const
 154   {
 155     for (; __lo < __hi; ++__vec, ++__lo)
 156       {
 157         // Highest bitmask in ctype_base == 10, but extra in "C"
 158         // library for blank.
 159         const size_t __bitmasksize = 11;
 160         mask __m = 0;
 161         for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
 162           if (__iswctype_l(*__lo, _M_wmask[__bitcur], _M_c_locale_ctype))
 163             __m |= _M_bit[__bitcur];
 164         *__vec = __m;
 165       }
 166     return __hi;
 167   }
 168
 169   const wchar_t*
 170   ctype<wchar_t>::
 171   do_scan_is(mask __m, const wchar_t* __lo, const wchar_t* __hi) const
 172   {
 173     while (__lo < __hi && !this->do_is(__m, *__lo))
 174       ++__lo;
 175     return __lo;
 176   }
 177
 178   const wchar_t*
 179   ctype<wchar_t>::
 180   do_scan_not(mask __m, const char_type* __lo, const char_type* __hi) const
 181   {
 182     while (__lo < __hi && this->do_is(__m, *__lo) != 0)
 183       ++__lo;
 184     return __lo;
 185   }
 186
 187   wchar_t
 188   ctype<wchar_t>::
 189   do_widen(char __c) const
 190   { return _M_widen[static_cast<unsigned char>(__c)]; }
 191
 192   const char*
 193   ctype<wchar_t>::
 194   do_widen(const char* __lo, const char* __hi, wchar_t* __dest) const
 195   {
 196     while (__lo < __hi)
 197       {
 198         *__dest = _M_widen[static_cast<unsigned char>(*__lo)];
 199         ++__lo;
 200         ++__dest;
 201       }
 202     return __hi;
 203   }
 204
 205   char
 206   ctype<wchar_t>::
 207   do_narrow(wchar_t __wc, char __dfault) const
 208   {
 209     if (__wc >= 0 && __wc < 128 && _M_narrow_ok)
 210       return _M_narrow[__wc];
 211 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 212     __c_locale __old = __uselocale(_M_c_locale_ctype);
 213 #endif
 214     const int __c = wctob(__wc);
 215 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 216     __uselocale(__old);
 217 #endif
 218     return (__c == EOF ? __dfault : static_cast<char>(__c));
 219   }
 220
 221   const wchar_t*
 222   ctype<wchar_t>::
 223   do_narrow(const wchar_t* __lo, const wchar_t* __hi, char __dfault,
 224             char* __dest) const
 225   {
 226 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 227     __c_locale __old = __uselocale(_M_c_locale_ctype);
 228 #endif
 229     if (_M_narrow_ok)
 230       while (__lo < __hi)
 231         {
 232           if (*__lo >= 0 && *__lo < 128)
 233             *__dest = _M_narrow[*__lo];
 234           else
 235             {
 236               const int __c = wctob(*__lo);
 237               *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
 238             }
 239           ++__lo;
 240           ++__dest;
 241         }
 242     else
 243       while (__lo < __hi)
 244         {
 245           const int __c = wctob(*__lo);
 246           *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
 247           ++__lo;
 248           ++__dest;
 249         }
 250 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 251     __uselocale(__old);
 252 #endif
 253     return __hi;
 254   }
 255
 256   void
 257   ctype<wchar_t>::_M_initialize_ctype()
 258   {
 259 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 260     __c_locale __old = __uselocale(_M_c_locale_ctype);
 261 #endif
 262     wint_t __i;
 263     for (__i = 0; __i < 128; ++__i)
 264       {
 265         const int __c = wctob(__i);
 266         if (__c == EOF)
 267           break;
 268         else
 269           _M_narrow[__i] = static_cast<char>(__c);
 270       }
 271     if (__i == 128)
 272       _M_narrow_ok = true;
 273     else
 274       _M_narrow_ok = false;
 275     for (size_t __i = 0;
 276          __i < sizeof(_M_widen) / sizeof(wint_t); ++__i)
 277       _M_widen[__i] = btowc(__i);
 278
 279     for (size_t __i = 0; __i <= 11; ++__i)
 280       {
 281         _M_bit[__i] = static_cast<mask>(_ISbit(__i));
 282         _M_wmask[__i] = _M_convert_to_wmask(_M_bit[__i]);
 283       }
 284 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 285     __uselocale(__old);
 286 #endif
 287   }
 288 #endif //  _GLIBCXX_USE_WCHAR_T
 289 }