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

   1 // Wrapper for underlying C-language localization -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2002, 2003 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 #ifndef _C_LOCALE_H
  37 #define _C_LOCALE_H 1
  38
  39 #pragma GCC system_header
  40
  41 #include <clocale>
  42 #include <langinfo.h>           // For codecvt
  43 #include <iconv.h>              // For codecvt using iconv, iconv_t
  44 #include <libintl.h>            // For messages
  45
  46 #define _GLIBCXX_C_LOCALE_GNU 1
  47
  48 #define _GLIBCXX_NUM_CATEGORIES 6
  49
  50 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
  51 namespace __gnu_cxx
  52 {
  53   extern "C" __typeof(uselocale) __uselocale;
  54 }
  55 #endif
  56
  57 namespace std
  58 {
  59   typedef __locale_t            __c_locale;
  60
  61   // Convert numeric value of type _Tv to string and return length of
  62   // string.  If snprintf is available use it, otherwise fall back to
  63   // the unsafe sprintf which, in general, can be dangerous and should
  64   // be avoided.
  65   template<typename _Tv>
  66     int
  67     __convert_from_v(char* __out, const int __size, const char* __fmt,
  68 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
  69                      _Tv __v, const __c_locale& __cloc, int __prec = -1)
  70     {
  71       __c_locale __old = __gnu_cxx::__uselocale(__cloc);
  72 #else
  73                      _Tv __v, const __c_locale&, int __prec = -1)
  74     {
  75       char* __old = setlocale(LC_ALL, NULL);
  76       char* __sav = static_cast<char*>(malloc(strlen(__old) + 1));
  77       if (__sav)
  78         strcpy(__sav, __old);
  79       setlocale(LC_ALL, "C");
  80 #endif
  81
  82       int __ret;
  83 #ifdef _GLIBCXX_USE_C99
  84       if (__prec >= 0)
  85         __ret = snprintf(__out, __size, __fmt, __prec, __v);
  86       else
  87         __ret = snprintf(__out, __size, __fmt, __v);
  88 #else
  89       if (__prec >= 0)
  90         __ret = sprintf(__out, __fmt, __prec, __v);
  91       else
  92         __ret = sprintf(__out, __fmt, __v);
  93 #endif
  94
  95 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
  96       __gnu_cxx::__uselocale(__old);
  97 #else
  98       setlocale(LC_ALL, __sav);
  99       free(__sav);
 100 #endif
 101       return __ret;
 102     }
 103 }
 104
 105 #endif