libstdc++-v3/config/locale/generic/c_locale.cc

   1 // Wrapper for underlying C-language localization -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2002 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: 22.8  Standard locale categories.
  32 //
  33
  34 // Written by Benjamin Kosnik <bkoz@redhat.com>
  35
  36 #include <locale>
  37
  38 #ifdef _GLIBCPP_HAVE_IEEEFP_H
  39 #include <ieeefp.h>
  40 #endif
  41
  42 namespace std
  43 {
  44   // Specializations for all types used in num_get.
  45   template<>
  46     void
  47     __convert_to_v(const char* __s, long& __v, ios_base::iostate& __err,
  48                    const __c_locale&, int __base)
  49     {
  50       if (!(__err & ios_base::failbit))
  51       {
  52         char* __sanity;
  53         errno = 0;
  54         long __l = strtol(__s, &__sanity, __base);
  55         if (__sanity != __s && *__sanity == '\0' && errno != ERANGE)
  56           __v = __l;
  57         else
  58           __err |= ios_base::failbit;
  59       }
  60     }
  61
  62   template<>
  63     void
  64     __convert_to_v(const char* __s, unsigned long& __v,
  65                    ios_base::iostate& __err, const __c_locale&, int __base)
  66     {
  67       if (!(__err & ios_base::failbit))
  68         {
  69           char* __sanity;
  70           errno = 0;
  71           unsigned long __ul = strtoul(__s, &__sanity, __base);
  72           if (__sanity != __s && *__sanity == '\0' && errno != ERANGE)
  73             __v = __ul;
  74           else
  75             __err |= ios_base::failbit;
  76         }
  77     }
  78
  79 #ifdef _GLIBCPP_USE_LONG_LONG
  80   template<>
  81     void
  82     __convert_to_v(const char* __s, long long& __v, ios_base::iostate& __err,
  83                    const __c_locale&, int __base)
  84     {
  85       if (!(__err & ios_base::failbit))
  86         {
  87           char* __sanity;
  88           errno = 0;
  89           long long __ll = strtoll(__s, &__sanity, __base);
  90           if (__sanity != __s && *__sanity == '\0' && errno != ERANGE)
  91             __v = __ll;
  92           else
  93             __err |= ios_base::failbit;
  94         }
  95     }
  96
  97   template<>
  98     void
  99     __convert_to_v(const char* __s, unsigned long long& __v,
 100                    ios_base::iostate& __err, const __c_locale&, int __base)
 101     {
 102       if (!(__err & ios_base::failbit))
 103         {
 104           char* __sanity;
 105           errno = 0;
 106           unsigned long long __ull = strtoull(__s, &__sanity, __base);
 107           if (__sanity != __s && *__sanity == '\0' && errno != ERANGE)
 108             __v = __ull;
 109           else
 110             __err |= ios_base::failbit;
 111         }
 112     }
 113 #endif
 114
 115   template<>
 116     void
 117     __convert_to_v(const char* __s, float& __v, ios_base::iostate& __err,
 118                    const __c_locale&, int)
 119     {
 120       if (!(__err & ios_base::failbit))
 121         {
 122           // Assumes __s formatted for "C" locale.
 123           const char* __old = setlocale(LC_ALL, "C");
 124           char* __sanity;
 125           errno = 0;
 126 #if defined(_GLIBCPP_USE_C99)
 127           float __f = strtof(__s, &__sanity);
 128 #else
 129           double __d = strtod(__s, &__sanity);
 130           float __f = static_cast<float>(__d);
 131 #ifdef _GLIBCPP_HAVE_FINITEF
 132           if (!finitef (__f))
 133             errno = ERANGE;
 134 #elif defined (_GLIBCPP_HAVE_FINITE)
 135           if (!finite (static_cast<double> (__f)))
 136             errno = ERANGE;
 137 #elif defined (_GLIBCPP_HAVE_ISINF)
 138           if (isinf (static_cast<double> (__f)))
 139             errno = ERANGE;
 140 #else
 141           if (fabs(__d) > numeric_limits<float>::max())
 142             errno = ERANGE;
 143 #endif
 144 #endif
 145           if (__sanity != __s && *__sanity == '\0' && errno != ERANGE)
 146             __v = __f;
 147           else
 148             __err |= ios_base::failbit;
 149           setlocale(LC_ALL, __old);
 150         }
 151     }
 152
 153   template<>
 154     void
 155     __convert_to_v(const char* __s, double& __v, ios_base::iostate& __err,
 156                    const __c_locale&, int)
 157     {
 158       if (!(__err & ios_base::failbit))
 159         {
 160           // Assumes __s formatted for "C" locale.
 161           const char* __old = setlocale(LC_ALL, "C");
 162           char* __sanity;
 163           errno = 0;
 164           double __d = strtod(__s, &__sanity);
 165           if (__sanity != __s && *__sanity == '\0' && errno != ERANGE)
 166             __v = __d;
 167           else
 168             __err |= ios_base::failbit;
 169           setlocale(LC_ALL, __old);
 170         }
 171     }
 172
 173   template<>
 174     void
 175     __convert_to_v(const char* __s, long double& __v,
 176                    ios_base::iostate& __err, const __c_locale&, int)
 177     {
 178       if (!(__err & ios_base::failbit))
 179         {
 180           // Assumes __s formatted for "C" locale.
 181           const char* __old = setlocale(LC_ALL, "C");
 182 #if defined(_GLIBCPP_USE_C99)
 183           char* __sanity;
 184           errno = 0;
 185           long double __ld = strtold(__s, &__sanity);
 186           if (__sanity != __s && *__sanity == '\0' && errno != ERANGE)
 187             __v = __ld;
 188 #else
 189           typedef char_traits<char>::int_type int_type;
 190           long double __ld;
 191           errno = 0;
 192           int __p = sscanf(__s, "%Lf", &__ld);
 193           if (errno == ERANGE)
 194             __p = 0;
 195 #ifdef _GLIBCPP_HAVE_FINITEL
 196           if ((__p == 1) && !finitel (__ld))
 197             __p = 0;
 198 #endif
 199           if (__p && static_cast<int_type>(__p) != char_traits<char>::eof())
 200             __v = __ld;
 201 #endif
 202           else
 203             __err |= ios_base::failbit;
 204           setlocale(LC_ALL, __old);
 205         }
 206     }
 207
 208   void
 209   locale::facet::_S_create_c_locale(__c_locale& __cloc, const char*,
 210                                     __c_locale)
 211   { __cloc = NULL; }
 212
 213   void
 214   locale::facet::_S_destroy_c_locale(__c_locale& __cloc)
 215   { __cloc = NULL; }
 216
 217   __c_locale
 218   locale::facet::_S_clone_c_locale(__c_locale&)
 219   { return __c_locale(); }
 220 }  // namespace std