cegcc/src/gcc-4.4.0/libstdc++-v3/config/locale/generic/c_locale.h

   1 // Wrapper for underlying C-language localization -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009
   4 // Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // Under Section 7 of GPL version 3, you are granted additional
  18 // permissions described in the GCC Runtime Library Exception, version
  19 // 3.1, as published by the Free Software Foundation.
  20
  21 // You should have received a copy of the GNU General Public License and
  22 // a copy of the GCC Runtime Library Exception along with this program;
  23 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 // <http://www.gnu.org/licenses/>.
  25
  26 /** @file c++locale.h
  27  *  This is an internal header file, included by other library headers.
  28  *  You should not attempt to use it directly.
  29  */
  30
  31 //
  32 // ISO C++ 14882: 22.8  Standard locale categories.
  33 //
  34
  35 // Written by Benjamin Kosnik <bkoz@redhat.com>
  36
  37 #ifndef _GLIBCXX_CXX_LOCALE_H
  38 #define _GLIBCXX_CXX_LOCALE_H 1
  39
  40 #pragma GCC system_header
  41
  42 #ifdef _GLIBCXX_HAVE_LOCALE_H
  43 #include <clocale>
  44 #endif
  45 #include <cstring>   // get std::strlen
  46 #include <cstdio>    // get std::vsnprintf or std::vsprintf
  47 #include <cstdarg>
  48 #include <cstddef>
  49
  50 #define _GLIBCXX_NUM_CATEGORIES 0
  51
  52 _GLIBCXX_BEGIN_NAMESPACE(std)
  53
  54   typedef int*                  __c_locale;
  55
  56   // Convert numeric value of type double and long double to string and
  57   // return length of string.  If vsnprintf is available use it, otherwise
  58   // fall back to the unsafe vsprintf which, in general, can be dangerous
  59   // and should be avoided.
  60   inline int
  61   __convert_from_v(const __c_locale&, char* __out,
  62                    const int __size __attribute__((__unused__)),
  63                    const char* __fmt, ...)
  64   {
  65 #ifndef __MINGW32CE__
  66     char* __old = std::setlocale(LC_NUMERIC, NULL);
  67     char* __sav = NULL;
  68     if (__builtin_strcmp(__old, "C"))
  69       {
  70         const size_t __len = __builtin_strlen(__old) + 1;
  71         __sav = new char[__len];
  72         __builtin_memcpy(__sav, __old, __len);
  73         std::setlocale(LC_NUMERIC, "C");
  74       }
  75 #endif
  76
  77     __builtin_va_list __args;
  78     __builtin_va_start(__args, __fmt);
  79
  80 #ifdef _GLIBCXX_USE_C99
  81     const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args);
  82 #else
  83     const int __ret = __builtin_vsprintf(__out, __fmt, __args);
  84 #endif
  85
  86     __builtin_va_end(__args);
  87
  88 #ifndef __MINGW32CE__
  89     if (__sav)
  90       {
  91         std::setlocale(LC_NUMERIC, __sav);
  92         delete [] __sav;
  93       }
  94 #endif
  95     return __ret;
  96   }
  97
  98 _GLIBCXX_END_NAMESPACE
  99
 100 #endif