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

   1 // std::ctype implementation details, GNU 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 <cstdio>
  34 #include <bits/c++locale_internal.h>
  35
  36 _GLIBCXX_BEGIN_NAMESPACE(std)
  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         this->_M_toupper = this->_M_c_locale_ctype->__ctype_toupper;
  48         this->_M_tolower = this->_M_c_locale_ctype->__ctype_tolower;
  49         this->_M_table = this->_M_c_locale_ctype->__ctype_b;
  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_l("space", _M_c_locale_ctype);
  65         break;
  66       case print:
  67         __ret = __wctype_l("print", _M_c_locale_ctype);
  68         break;
  69       case cntrl:
  70         __ret = __wctype_l("cntrl", _M_c_locale_ctype);
  71         break;
  72       case upper:
  73         __ret = __wctype_l("upper", _M_c_locale_ctype);
  74         break;
  75       case lower:
  76         __ret = __wctype_l("lower", _M_c_locale_ctype);
  77         break;
  78       case alpha:
  79         __ret = __wctype_l("alpha", _M_c_locale_ctype);
  80         break;
  81       case digit:
  82         __ret = __wctype_l("digit", _M_c_locale_ctype);
  83         break;
  84       case punct:
  85         __ret = __wctype_l("punct", _M_c_locale_ctype);
  86         break;
  87       case xdigit:
  88         __ret = __wctype_l("xdigit", _M_c_locale_ctype);
  89         break;
  90       case alnum:
  91         __ret = __wctype_l("alnum", _M_c_locale_ctype);
  92         break;
  93       case graph:
  94         __ret = __wctype_l("graph", _M_c_locale_ctype);
  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_l(__c, _M_c_locale_ctype); }
 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_l(*__lo, _M_c_locale_ctype);
 112         ++__lo;
 113       }
 114     return __hi;
 115   }
 116
 117   wchar_t
 118   ctype<wchar_t>::do_tolower(wchar_t __c) const
 119   { return __towlower_l(__c, _M_c_locale_ctype); }
 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_l(*__lo, _M_c_locale_ctype);
 127         ++__lo;
 128       }
 129     return __hi;
 130   }
 131
 132   bool
 133   ctype<wchar_t>::
 134   do_is(mask __m, wchar_t __c) const
 135   {
 136     // The case of __m == ctype_base::space is particularly important,
 137     // due to its use in many istream functions.  Therefore we deal with
 138     // it first, exploiting the knowledge that on GNU systems _M_bit[5]
 139     // is the mask corresponding to ctype_base::space.  NB: an encoding
 140     // change would not affect correctness!
 141     bool __ret = false;
 142     if (__m == _M_bit[5])
 143       __ret = __iswctype_l(__c, _M_wmask[5], _M_c_locale_ctype);
 144     else
 145       {
 146         // Highest bitmask in ctype_base == 10, but extra in "C"
 147         // library for blank.
 148         const size_t __bitmasksize = 11;
 149         for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
 150           if (__m & _M_bit[__bitcur])
 151             {
 152               if (__iswctype_l(__c, _M_wmask[__bitcur], _M_c_locale_ctype))
 153                 {
 154                   __ret = true;
 155                   break;
 156                 }
 157               else if (__m == _M_bit[__bitcur])
 158                 break;
 159             }
 160       }
 161     return __ret;
 162   }
 163
 164   const wchar_t*
 165   ctype<wchar_t>::
 166   do_is(const wchar_t* __lo, const wchar_t* __hi, mask* __vec) const
 167   {
 168     for (; __lo < __hi; ++__vec, ++__lo)
 169       {
 170         // Highest bitmask in ctype_base == 10, but extra in "C"
 171         // library for blank.
 172         const size_t __bitmasksize = 11;
 173         mask __m = 0;
 174         for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
 175           if (__iswctype_l(*__lo, _M_wmask[__bitcur], _M_c_locale_ctype))
 176             __m |= _M_bit[__bitcur];
 177         *__vec = __m;
 178       }
 179     return __hi;
 180   }
 181
 182   const wchar_t*
 183   ctype<wchar_t>::
 184   do_scan_is(mask __m, const wchar_t* __lo, const wchar_t* __hi) const
 185   {
 186     while (__lo < __hi && !this->do_is(__m, *__lo))
 187       ++__lo;
 188     return __lo;
 189   }
 190
 191   const wchar_t*
 192   ctype<wchar_t>::
 193   do_scan_not(mask __m, const char_type* __lo, const char_type* __hi) const
 194   {
 195     while (__lo < __hi && this->do_is(__m, *__lo) != 0)
 196       ++__lo;
 197     return __lo;
 198   }
 199
 200   wchar_t
 201   ctype<wchar_t>::
 202   do_widen(char __c) const
 203   { return _M_widen[static_cast<unsigned char>(__c)]; }
 204
 205   const char*
 206   ctype<wchar_t>::
 207   do_widen(const char* __lo, const char* __hi, wchar_t* __dest) const
 208   {
 209     while (__lo < __hi)
 210       {
 211         *__dest = _M_widen[static_cast<unsigned char>(*__lo)];
 212         ++__lo;
 213         ++__dest;
 214       }
 215     return __hi;
 216   }
 217
 218   char
 219   ctype<wchar_t>::
 220   do_narrow(wchar_t __wc, char __dfault) const
 221   {
 222     if (__wc >= 0 && __wc < 128 && _M_narrow_ok)
 223       return _M_narrow[__wc];
 224 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 225     __c_locale __old = __uselocale(_M_c_locale_ctype);
 226 #endif
 227     const int __c = wctob(__wc);
 228 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 229     __uselocale(__old);
 230 #endif
 231     return (__c == EOF ? __dfault : static_cast<char>(__c));
 232   }
 233
 234   const wchar_t*
 235   ctype<wchar_t>::
 236   do_narrow(const wchar_t* __lo, const wchar_t* __hi, char __dfault,
 237             char* __dest) const
 238   {
 239 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 240     __c_locale __old = __uselocale(_M_c_locale_ctype);
 241 #endif
 242     if (_M_narrow_ok)
 243       while (__lo < __hi)
 244         {
 245           if (*__lo >= 0 && *__lo < 128)
 246             *__dest = _M_narrow[*__lo];
 247           else
 248             {
 249               const int __c = wctob(*__lo);
 250               *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
 251             }
 252           ++__lo;
 253           ++__dest;
 254         }
 255     else
 256       while (__lo < __hi)
 257         {
 258           const int __c = wctob(*__lo);
 259           *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
 260           ++__lo;
 261           ++__dest;
 262         }
 263 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 264     __uselocale(__old);
 265 #endif
 266     return __hi;
 267   }
 268
 269   void
 270   ctype<wchar_t>::_M_initialize_ctype() throw()
 271   {
 272 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 273     __c_locale __old = __uselocale(_M_c_locale_ctype);
 274 #endif
 275     wint_t __i;
 276     for (__i = 0; __i < 128; ++__i)
 277       {
 278         const int __c = wctob(__i);
 279         if (__c == EOF)
 280           break;
 281         else
 282           _M_narrow[__i] = static_cast<char>(__c);
 283       }
 284     if (__i == 128)
 285       _M_narrow_ok = true;
 286     else
 287       _M_narrow_ok = false;
 288     for (size_t __j = 0;
 289          __j < sizeof(_M_widen) / sizeof(wint_t); ++__j)
 290       _M_widen[__j] = btowc(__j);
 291
 292     for (size_t __k = 0; __k <= 11; ++__k)
 293       {
 294         _M_bit[__k] = static_cast<mask>(_ISbit(__k));
 295         _M_wmask[__k] = _M_convert_to_wmask(_M_bit[__k]);
 296       }
 297 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 298     __uselocale(__old);
 299 #endif
 300   }
 301 #endif //  _GLIBCXX_USE_WCHAR_T
 302
 303 _GLIBCXX_END_NAMESPACE