libstdc++-v3/config/locale/gnu/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 #include <langinfo.h>           // For codecvt
  38 #include <iconv.h>              // For codecvt using iconv, iconv_t
  39 #include <libintl.h>            // For messages
  40
  41 #define _GLIBCPP_C_LOCALE_GNU 1
  42
  43 #define _GLIBCPP_NUM_CATEGORIES 6
  44
  45 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
  46 namespace __gnu_cxx
  47 {
  48   extern "C" __typeof(uselocale) __uselocale;
  49 }
  50 #endif
  51
  52 namespace std
  53 {
  54   typedef __locale_t            __c_locale;
  55
  56   template<typename _Tv>
  57     int
  58     __convert_from_v(char* __out, const int __size, const char* __fmt,
  59 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
  60                      _Tv __v, const __c_locale& __cloc, int __prec = -1)
  61     {
  62       __c_locale __old = __gnu_cxx::__uselocale(__cloc);
  63 #else
  64                      _Tv __v, const __c_locale&, int __prec = -1)
  65     {
  66       char* __old = setlocale(LC_ALL, NULL);
  67       char* __sav = static_cast<char*>(malloc(strlen(__old) + 1));
  68       if (__sav)
  69         strcpy(__sav, __old);
  70       setlocale(LC_ALL, "C");
  71 #endif
  72
  73       int __ret;
  74 #ifdef _GLIBCPP_USE_C99
  75       if (__prec >= 0)
  76         __ret = snprintf(__out, __size, __fmt, __prec, __v);
  77       else
  78         __ret = snprintf(__out, __size, __fmt, __v);
  79 #else
  80       if (__prec >= 0)
  81         __ret = sprintf(__out, __fmt, __prec, __v);
  82       else
  83         __ret = sprintf(__out, __fmt, __v);
  84 #endif
  85
  86 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
  87       __gnu_cxx::__uselocale(__old);
  88 #else
  89       setlocale(LC_ALL, __sav);
  90       free(__sav);
  91 #endif
  92       return __ret;
  93     }
  94 }