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

   1 // std::ctype implementation details, newlib version -*- C++ -*-
   2
   3 // Copyright (C) 2011-2013 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 //
  26 // ISO C++ 14882: 22.2.1.1.2  ctype virtual functions.
  27 //
  28
  29 #include <locale>
  30 #include <cstdlib>
  31 #include <cstring>
  32 #include <cstdio>
  33
  34 namespace std _GLIBCXX_VISIBILITY(default)
  35 {
  36 _GLIBCXX_BEGIN_NAMESPACE_VERSION
  37
  38   // NB: The other ctype<char> specializations are in src/locale.cc and
  39   // various /config/os/* files.
  40   ctype_byname<char>::ctype_byname(const char* __s, size_t __refs)
  41   : ctype<char>(0, false, __refs)
  42   {
  43     if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0)
  44       {
  45         this->_S_destroy_c_locale(this->_M_c_locale_ctype);
  46         this->_S_create_c_locale(this->_M_c_locale_ctype, __s);
  47       }
  48   }
  49
  50   ctype_byname<char>::~ctype_byname()
  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 throw()
  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         // Different from the generic version, xdigit and print in
  95         // newlib are defined as bitwise-OR result of bitmasks:
  96         //   xdigit = _X | _N;
  97         //   print  = _P | _U | _L | _N | _B;
  98         // in which _X and _B don't correspond to any ctype mask.
  99         // In order to get the wmask correctly converted when __m is
 100         // equal to _X or _B, the two cases are specifically handled
 101         // here.
 102         if (__m & xdigit)
 103           __ret = wctype("xdigit");
 104         else if (__m & print)
 105           __ret = wctype("print");
 106         else
 107           __ret = __wmask_type();
 108       }
 109     return __ret;
 110   };
 111
 112   wchar_t
 113   ctype<wchar_t>::do_toupper(wchar_t __c) const
 114   { return towupper(__c); }
 115
 116   const wchar_t*
 117   ctype<wchar_t>::do_toupper(wchar_t* __lo, const wchar_t* __hi) const
 118   {
 119     while (__lo < __hi)
 120       {
 121         *__lo = towupper(*__lo);
 122         ++__lo;
 123       }
 124     return __hi;
 125   }
 126
 127   wchar_t
 128   ctype<wchar_t>::do_tolower(wchar_t __c) const
 129   { return towlower(__c); }
 130
 131   const wchar_t*
 132   ctype<wchar_t>::do_tolower(wchar_t* __lo, const wchar_t* __hi) const
 133   {
 134     while (__lo < __hi)
 135       {
 136         *__lo = towlower(*__lo);
 137         ++__lo;
 138       }
 139     return __hi;
 140   }
 141
 142   bool
 143   ctype<wchar_t>::
 144   do_is(mask __m, wchar_t __c) const
 145   {
 146     bool __ret = false;
 147     // Newlib C library has a compact encoding that uses 8 bits only.
 148     const size_t __bitmasksize = 7;
 149     for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
 150       if (__m & _M_bit[__bitcur]
 151           && iswctype(__c, _M_wmask[__bitcur]))
 152         {
 153           __ret = true;
 154           break;
 155         }
 156     return __ret;
 157   }
 158
 159   const wchar_t*
 160   ctype<wchar_t>::
 161   do_is(const wchar_t* __lo, const wchar_t* __hi, mask* __vec) const
 162   {
 163     for (; __lo < __hi; ++__vec, ++__lo)
 164       {
 165         // Newlib C library has a compact encoding that uses 8 bits only.
 166         const size_t __bitmasksize = 7;
 167         mask __m = 0;
 168         for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
 169           if (iswctype(*__lo, _M_wmask[__bitcur]))
 170             __m |= _M_bit[__bitcur];
 171         *__vec = __m;
 172       }
 173     return __hi;
 174   }
 175
 176   const wchar_t*
 177   ctype<wchar_t>::
 178   do_scan_is(mask __m, const wchar_t* __lo, const wchar_t* __hi) const
 179   {
 180     while (__lo < __hi && !this->do_is(__m, *__lo))
 181       ++__lo;
 182     return __lo;
 183   }
 184
 185   const wchar_t*
 186   ctype<wchar_t>::
 187   do_scan_not(mask __m, const char_type* __lo, const char_type* __hi) const
 188   {
 189     while (__lo < __hi && this->do_is(__m, *__lo) != 0)
 190       ++__lo;
 191     return __lo;
 192   }
 193
 194   wchar_t
 195   ctype<wchar_t>::
 196   do_widen(char __c) const
 197   { return _M_widen[static_cast<unsigned char>(__c)]; }
 198
 199   const char*
 200   ctype<wchar_t>::
 201   do_widen(const char* __lo, const char* __hi, wchar_t* __dest) const
 202   {
 203     while (__lo < __hi)
 204       {
 205         *__dest = _M_widen[static_cast<unsigned char>(*__lo)];
 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() throw()
 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 (size_t __i = 0;
 268          __i < sizeof(_M_widen) / sizeof(wint_t); ++__i)
 269       _M_widen[__i] = btowc(__i);
 270
 271     for (size_t __i = 0; __i <= 7; ++__i)
 272       {
 273         _M_bit[__i] = static_cast<mask>(1 << __i);
 274         _M_wmask[__i] = _M_convert_to_wmask(_M_bit[__i]);
 275       }
 276   }
 277 #endif //  _GLIBCXX_USE_WCHAR_T
 278
 279 _GLIBCXX_END_NAMESPACE_VERSION
 280 } // namespace