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
   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 <cstdio>
  39 #include <bits/c++locale_internal.h>
  40
  41 _GLIBCXX_BEGIN_NAMESPACE(std)
  42
  43   // NB: The other ctype<char> specializations are in src/locale.cc and
  44   // various /config/os/* files.
  45   ctype_byname<char>::ctype_byname(const char* __s, size_t __refs)
  46   : ctype<char>(0, false, __refs)
  47   {
  48     if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0)
  49       {
  50         this->_S_destroy_c_locale(this->_M_c_locale_ctype);
  51         this->_S_create_c_locale(this->_M_c_locale_ctype, __s);
  52         this->_M_toupper = this->_M_c_locale_ctype->__ctype_toupper;
  53         this->_M_tolower = this->_M_c_locale_ctype->__ctype_tolower;
  54         this->_M_table = this->_M_c_locale_ctype->__ctype_b;
  55       }
  56   }
  57
  58   ctype_byname<char>::~ctype_byname()
  59   { }
  60
  61 #ifdef _GLIBCXX_USE_WCHAR_T
  62   ctype<wchar_t>::__wmask_type
  63   ctype<wchar_t>::_M_convert_to_wmask(const mask __m) const
  64   {
  65     __wmask_type __ret;
  66     switch (__m)
  67       {
  68       case space:
  69         __ret = __wctype_l("space", _M_c_locale_ctype);
  70         break;
  71       case print:
  72         __ret = __wctype_l("print", _M_c_locale_ctype);
  73         break;
  74       case cntrl:
  75         __ret = __wctype_l("cntrl", _M_c_locale_ctype);
  76         break;
  77       case upper:
  78         __ret = __wctype_l("upper", _M_c_locale_ctype);
  79         break;
  80       case lower:
  81         __ret = __wctype_l("lower", _M_c_locale_ctype);
  82         break;
  83       case alpha:
  84         __ret = __wctype_l("alpha", _M_c_locale_ctype);
  85         break;
  86       case digit:
  87         __ret = __wctype_l("digit", _M_c_locale_ctype);
  88         break;
  89       case punct:
  90         __ret = __wctype_l("punct", _M_c_locale_ctype);
  91         break;
  92       case xdigit:
  93         __ret = __wctype_l("xdigit", _M_c_locale_ctype);
  94         break;
  95       case alnum:
  96         __ret = __wctype_l("alnum", _M_c_locale_ctype);
  97         break;
  98       case graph:
  99         __ret = __wctype_l("graph", _M_c_locale_ctype);
 100         break;
 101       default:
 102         __ret = __wmask_type();
 103       }
 104     return __ret;
 105   }
 106
 107   wchar_t
 108   ctype<wchar_t>::do_toupper(wchar_t __c) const
 109   { return __towupper_l(__c, _M_c_locale_ctype); }
 110
 111   const wchar_t*
 112   ctype<wchar_t>::do_toupper(wchar_t* __lo, const wchar_t* __hi) const
 113   {
 114     while (__lo < __hi)
 115       {
 116         *__lo = __towupper_l(*__lo, _M_c_locale_ctype);
 117         ++__lo;
 118       }
 119     return __hi;
 120   }
 121
 122   wchar_t
 123   ctype<wchar_t>::do_tolower(wchar_t __c) const
 124   { return __towlower_l(__c, _M_c_locale_ctype); }
 125
 126   const wchar_t*
 127   ctype<wchar_t>::do_tolower(wchar_t* __lo, const wchar_t* __hi) const
 128   {
 129     while (__lo < __hi)
 130       {
 131         *__lo = __towlower_l(*__lo, _M_c_locale_ctype);
 132         ++__lo;
 133       }
 134     return __hi;
 135   }
 136
 137   bool
 138   ctype<wchar_t>::
 139   do_is(mask __m, wchar_t __c) const
 140   {
 141     // The case of __m == ctype_base::space is particularly important,
 142     // due to its use in many istream functions.  Therefore we deal with
 143     // it first, exploiting the knowledge that on GNU systems _M_bit[5]
 144     // is the mask corresponding to ctype_base::space.  NB: an encoding
 145     // change would not affect correctness!
 146     bool __ret = false;
 147     if (__m == _M_bit[5])
 148       __ret = __iswctype_l(__c, _M_wmask[5], _M_c_locale_ctype);
 149     else
 150       {
 151         // Highest bitmask in ctype_base == 10, but extra in "C"
 152         // library for blank.
 153         const size_t __bitmasksize = 11;
 154         for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
 155           if (__m & _M_bit[__bitcur])
 156             {
 157               if (__iswctype_l(__c, _M_wmask[__bitcur], _M_c_locale_ctype))
 158                 {
 159                   __ret = true;
 160                   break;
 161                 }
 162               else if (__m == _M_bit[__bitcur])
 163                 break;
 164             }
 165       }
 166     return __ret;
 167   }
 168
 169   const wchar_t*
 170   ctype<wchar_t>::
 171   do_is(const wchar_t* __lo, const wchar_t* __hi, mask* __vec) const
 172   {
 173     for (; __lo < __hi; ++__vec, ++__lo)
 174       {
 175         // Highest bitmask in ctype_base == 10, but extra in "C"
 176         // library for blank.
 177         const size_t __bitmasksize = 11;
 178         mask __m = 0;
 179         for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
 180           if (__iswctype_l(*__lo, _M_wmask[__bitcur], _M_c_locale_ctype))
 181             __m |= _M_bit[__bitcur];
 182         *__vec = __m;
 183       }
 184     return __hi;
 185   }
 186
 187   const wchar_t*
 188   ctype<wchar_t>::
 189   do_scan_is(mask __m, const wchar_t* __lo, const wchar_t* __hi) const
 190   {
 191     while (__lo < __hi && !this->do_is(__m, *__lo))
 192       ++__lo;
 193     return __lo;
 194   }
 195
 196   const wchar_t*
 197   ctype<wchar_t>::
 198   do_scan_not(mask __m, const char_type* __lo, const char_type* __hi) const
 199   {
 200     while (__lo < __hi && this->do_is(__m, *__lo) != 0)
 201       ++__lo;
 202     return __lo;
 203   }
 204
 205   wchar_t
 206   ctype<wchar_t>::
 207   do_widen(char __c) const
 208   { return _M_widen[static_cast<unsigned char>(__c)]; }
 209
 210   const char*
 211   ctype<wchar_t>::
 212   do_widen(const char* __lo, const char* __hi, wchar_t* __dest) const
 213   {
 214     while (__lo < __hi)
 215       {
 216         *__dest = _M_widen[static_cast<unsigned char>(*__lo)];
 217         ++__lo;
 218         ++__dest;
 219       }
 220     return __hi;
 221   }
 222
 223   char
 224   ctype<wchar_t>::
 225   do_narrow(wchar_t __wc, char __dfault) const
 226   {
 227     if (__wc >= 0 && __wc < 128 && _M_narrow_ok)
 228       return _M_narrow[__wc];
 229 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 230     __c_locale __old = __uselocale(_M_c_locale_ctype);
 231 #endif
 232     const int __c = wctob(__wc);
 233 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 234     __uselocale(__old);
 235 #endif
 236     return (__c == EOF ? __dfault : static_cast<char>(__c));
 237   }
 238
 239   const wchar_t*
 240   ctype<wchar_t>::
 241   do_narrow(const wchar_t* __lo, const wchar_t* __hi, char __dfault,
 242             char* __dest) const
 243   {
 244 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 245     __c_locale __old = __uselocale(_M_c_locale_ctype);
 246 #endif
 247     if (_M_narrow_ok)
 248       while (__lo < __hi)
 249         {
 250           if (*__lo >= 0 && *__lo < 128)
 251             *__dest = _M_narrow[*__lo];
 252           else
 253             {
 254               const int __c = wctob(*__lo);
 255               *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
 256             }
 257           ++__lo;
 258           ++__dest;
 259         }
 260     else
 261       while (__lo < __hi)
 262         {
 263           const int __c = wctob(*__lo);
 264           *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
 265           ++__lo;
 266           ++__dest;
 267         }
 268 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 269     __uselocale(__old);
 270 #endif
 271     return __hi;
 272   }
 273
 274   void
 275   ctype<wchar_t>::_M_initialize_ctype()
 276   {
 277 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 278     __c_locale __old = __uselocale(_M_c_locale_ctype);
 279 #endif
 280     wint_t __i;
 281     for (__i = 0; __i < 128; ++__i)
 282       {
 283         const int __c = wctob(__i);
 284         if (__c == EOF)
 285           break;
 286         else
 287           _M_narrow[__i] = static_cast<char>(__c);
 288       }
 289     if (__i == 128)
 290       _M_narrow_ok = true;
 291     else
 292       _M_narrow_ok = false;
 293     for (size_t __j = 0;
 294          __j < sizeof(_M_widen) / sizeof(wint_t); ++__j)
 295       _M_widen[__j] = btowc(__j);
 296
 297     for (size_t __k = 0; __k <= 11; ++__k)
 298       {
 299         _M_bit[__k] = static_cast<mask>(_ISbit(__k));
 300         _M_wmask[__k] = _M_convert_to_wmask(_M_bit[__k]);
 301       }
 302 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 303     __uselocale(__old);
 304 #endif
 305   }
 306 #endif //  _GLIBCXX_USE_WCHAR_T
 307
 308 _GLIBCXX_END_NAMESPACE