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

   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 <clocale>
  37
  38 #define _GLIBCPP_NUM_CATEGORIES 0
  39
  40 namespace std
  41 {
  42   typedef int*                  __c_locale;
  43
  44   template<typename _Tv>
  45     int
  46     __convert_from_v(char* __out, const int __size, const char* __fmt,
  47                      _Tv __v, const __c_locale&, int __prec = -1)
  48     {
  49       char* __old = setlocale(LC_ALL, NULL);
  50       char* __sav = static_cast<char*>(malloc(strlen(__old) + 1));
  51       if (__sav)
  52         strcpy(__sav, __old);
  53       setlocale(LC_ALL, "C");
  54
  55       int __ret;
  56 #ifdef _GLIBCPP_USE_C99
  57       if (__prec >= 0)
  58         __ret = snprintf(__out, __size, __fmt, __prec, __v);
  59       else
  60         __ret = snprintf(__out, __size, __fmt, __v);
  61 #else
  62       if (__prec >= 0)
  63         __ret = sprintf(__out, __fmt, __prec, __v);
  64       else
  65         __ret = sprintf(__out, __fmt, __v);
  66 #endif
  67       setlocale(LC_ALL, __sav);
  68       free(__sav);
  69       return __ret;
  70     }
  71 }