libstdc++-v3/config/os/gnu-linux/ctype_configure_char.cc

   1 // Locale support -*- C++ -*-
   2
   3 // Copyright (C) 2011-2023 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 /** @file ctype_configure_char.cc */
  26
  27 //
  28 // ISO C++ 14882: 22.1  Locales
  29 //
  30
  31 #include <locale>
  32 #include <cstdlib>
  33 #include <cstring>
  34
  35 namespace std _GLIBCXX_VISIBILITY(default)
  36 {
  37 _GLIBCXX_BEGIN_NAMESPACE_VERSION
  38
  39 // Information as gleaned from /usr/include/ctype.h
  40
  41 #if _GLIBCXX_C_LOCALE_GNU
  42   const ctype_base::mask*
  43   ctype<char>::classic_table() throw()
  44   { return _S_get_c_locale()->__ctype_b; }
  45 #else
  46   const ctype_base::mask*
  47   ctype<char>::classic_table() throw()
  48   {
  49     const ctype_base::mask* __ret;
  50     char* __old = setlocale(LC_CTYPE, NULL);
  51     char* __sav = NULL;
  52     if (__builtin_strcmp(__old, "C"))
  53       {
  54         const size_t __len = __builtin_strlen(__old) + 1;
  55         __sav = new char[__len];
  56         __builtin_memcpy(__sav, __old, __len);
  57         setlocale(LC_CTYPE, "C");
  58       }
  59 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
  60     __ret = *__ctype_b_loc();
  61 #else
  62     __ret = __ctype_b;
  63 #endif
  64     if (__sav)
  65       {
  66         setlocale(LC_CTYPE, __sav);
  67         delete [] __sav;
  68       }
  69     return __ret;
  70   }
  71 #endif
  72
  73 #if _GLIBCXX_C_LOCALE_GNU
  74   ctype<char>::ctype(__c_locale __cloc, const mask* __table, bool __del,
  75                      size_t __refs)
  76   : facet(__refs), _M_c_locale_ctype(_S_clone_c_locale(__cloc)),
  77   _M_del(__table != 0 && __del),
  78   _M_toupper(_M_c_locale_ctype->__ctype_toupper),
  79   _M_tolower(_M_c_locale_ctype->__ctype_tolower),
  80   _M_table(__table ? __table : _M_c_locale_ctype->__ctype_b),
  81   _M_widen_ok(0), _M_narrow_ok(0)
  82   {
  83     __builtin_memset(_M_widen, 0, sizeof(_M_widen));
  84     __builtin_memset(_M_narrow, 0, sizeof(_M_narrow));
  85   }
  86 #else
  87   ctype<char>::ctype(__c_locale, const mask* __table, bool __del,
  88                      size_t __refs)
  89   : facet(__refs), _M_c_locale_ctype(_S_get_c_locale()),
  90   _M_del(__table != 0 && __del), _M_widen_ok(0), _M_narrow_ok(0)
  91   {
  92     char* __old = setlocale(LC_CTYPE, NULL);
  93     char* __sav = NULL;
  94     if (__builtin_strcmp(__old, "C"))
  95       {
  96         const size_t __len = __builtin_strlen(__old) + 1;
  97         __sav = new char[__len];
  98         __builtin_memcpy(__sav, __old, __len);
  99         setlocale(LC_CTYPE, "C");
 100       }
 101 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 102     _M_toupper = *__ctype_toupper_loc();
 103     _M_tolower = *__ctype_tolower_loc();
 104     _M_table = __table ? __table : *__ctype_b_loc();
 105 #else
 106     _M_toupper = __ctype_toupper;
 107     _M_tolower = __ctype_tolower;
 108     _M_table = __table ? __table : __ctype_b;
 109 #endif
 110     if (__sav)
 111       {
 112         setlocale(LC_CTYPE, __sav);
 113         delete [] __sav;
 114       }
 115     __builtin_memset(_M_widen, 0, sizeof(_M_widen));
 116     __builtin_memset(_M_narrow, 0, sizeof(_M_narrow));
 117   }
 118 #endif
 119
 120 #if _GLIBCXX_C_LOCALE_GNU
 121   ctype<char>::ctype(const mask* __table, bool __del, size_t __refs)
 122   : facet(__refs), _M_c_locale_ctype(_S_get_c_locale()),
 123   _M_del(__table != 0 && __del),
 124   _M_toupper(_M_c_locale_ctype->__ctype_toupper),
 125   _M_tolower(_M_c_locale_ctype->__ctype_tolower),
 126   _M_table(__table ? __table : _M_c_locale_ctype->__ctype_b),
 127   _M_widen_ok(0), _M_narrow_ok(0)
 128   {
 129     __builtin_memset(_M_widen, 0, sizeof(_M_widen));
 130     __builtin_memset(_M_narrow, 0, sizeof(_M_narrow));
 131   }
 132 #else
 133   ctype<char>::ctype(const mask* __table, bool __del, size_t __refs)
 134   : facet(__refs), _M_c_locale_ctype(_S_get_c_locale()),
 135   _M_del(__table != 0 && __del), _M_widen_ok(0), _M_narrow_ok(0)
 136   {
 137     char* __old = setlocale(LC_CTYPE, NULL);
 138     char* __sav = NULL;
 139     if (__builtin_strcmp(__old, "C"))
 140       {
 141         const size_t __len = __builtin_strlen(__old) + 1;
 142         __sav = new char[__len];
 143         __builtin_memcpy(__sav, __old, __len);
 144         setlocale(LC_CTYPE, "C");
 145       }
 146 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
 147     _M_toupper = *__ctype_toupper_loc();
 148     _M_tolower = *__ctype_tolower_loc();
 149     _M_table = __table ? __table : *__ctype_b_loc();
 150 #else
 151     _M_toupper = __ctype_toupper;
 152     _M_tolower = __ctype_tolower;
 153     _M_table = __table ? __table : __ctype_b;
 154 #endif
 155     if (__sav)
 156       {
 157         setlocale(LC_CTYPE, __sav);
 158         delete [] __sav;
 159       }
 160     __builtin_memset(_M_widen, 0, sizeof(_M_widen));
 161     __builtin_memset(_M_narrow, 0, sizeof(_M_narrow));
 162   }
 163 #endif
 164
 165   char
 166   ctype<char>::do_toupper(char __c) const
 167   { return _M_toupper[static_cast<unsigned char>(__c)]; }
 168
 169   const char*
 170   ctype<char>::do_toupper(char* __low, const char* __high) const
 171   {
 172     while (__low < __high)
 173       {
 174         *__low = _M_toupper[static_cast<unsigned char>(*__low)];
 175         ++__low;
 176       }
 177     return __high;
 178   }
 179
 180   char
 181   ctype<char>::do_tolower(char __c) const
 182   { return _M_tolower[static_cast<unsigned char>(__c)]; }
 183
 184   const char*
 185   ctype<char>::do_tolower(char* __low, const char* __high) const
 186   {
 187     while (__low < __high)
 188       {
 189         *__low = _M_tolower[static_cast<unsigned char>(*__low)];
 190         ++__low;
 191       }
 192     return __high;
 193   }
 194
 195 _GLIBCXX_END_NAMESPACE_VERSION
 196 } // namespace