# c++locale.h

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    00001 // Wrapper for underlying C-language localization -*- C++ -*-
    00002
    00003 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009
    00004 // Free Software Foundation, Inc.
    00005 //
    00006 // This file is part of the GNU ISO C++ Library.  This library is free
    00007 // software; you can redistribute it and/or modify it under the
    00008 // terms of the GNU General Public License as published by the
    00009 // Free Software Foundation; either version 3, or (at your option)
    00010 // any later version.
    00011
    00012 // This library is distributed in the hope that it will be useful,
    00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00015 // GNU General Public License for more details.
    00016
    00017 // Under Section 7 of GPL version 3, you are granted additional
    00018 // permissions described in the GCC Runtime Library Exception, version
    00019 // 3.1, as published by the Free Software Foundation.
    00020
    00021 // You should have received a copy of the GNU General Public License and
    00022 // a copy of the GCC Runtime Library Exception along with this program;
    00023 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    00024 // <http://www.gnu.org/licenses/>.
    00025
    00026 /** @file c++locale.h
    00027  *  This is an internal header file, included by other library headers.
    00028  *  You should not attempt to use it directly.
    00029  */
    00030
    00031 //
    00032 // ISO C++ 14882: 22.8  Standard locale categories.
    00033 //
    00034
    00035 // Written by Benjamin Kosnik <bkoz@redhat.com>
    00036
    00037 #ifndef _GLIBCXX_CXX_LOCALE_H
    00038 #define _GLIBCXX_CXX_LOCALE_H 1
    00039
    00040 #pragma GCC system_header
    00041
    00042 #include <clocale>
    00043 #include <cstddef>
    00044
    00045 #define _GLIBCXX_C_LOCALE_GNU 1
    00046
    00047 #define _GLIBCXX_NUM_CATEGORIES 6
    00048
    00049 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
    00050 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
    00051
    00052   extern "C" __typeof(uselocale) __uselocale;
    00053
    00054 _GLIBCXX_END_NAMESPACE
    00055 #endif
    00056
    00057 _GLIBCXX_BEGIN_NAMESPACE(std)
    00058
    00059   typedef __locale_t        __c_locale;
    00060
    00061   // Convert numeric value of type double and long double to string and
    00062   // return length of string.  If vsnprintf is available use it, otherwise
    00063   // fall back to the unsafe vsprintf which, in general, can be dangerous
    00064   // and should be avoided.
    00065   inline int
    00066   __convert_from_v(const __c_locale& __cloc __attribute__ ((__unused__)),
    00067            char* __out,
    00068            const int __size __attribute__ ((__unused__)),
    00069            const char* __fmt, ...)
    00070   {
    00071 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
    00072     __c_locale __old = __gnu_cxx::__uselocale(__cloc);
    00073 #else
    00074     char* __old = std::setlocale(LC_NUMERIC, NULL);
    00075     char* __sav = NULL;
    00076     if (__builtin_strcmp(__old, "C"))
    00077       {
    00078     const size_t __len = __builtin_strlen(__old) + 1;
    00079     __sav = new char[__len];
    00080     __builtin_memcpy(__sav, __old, __len);
    00081     std::setlocale(LC_NUMERIC, "C");
    00082       }
    00083 #endif
    00084
    00085     __builtin_va_list __args;
    00086     __builtin_va_start(__args, __fmt);
    00087
    00088 #ifdef _GLIBCXX_USE_C99
    00089     const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args);
    00090 #else
    00091     const int __ret = __builtin_vsprintf(__out, __fmt, __args);
    00092 #endif
    00093
    00094     __builtin_va_end(__args);
    00095
    00096 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
    00097     __gnu_cxx::__uselocale(__old);
    00098 #else
    00099     if (__sav)
    00100       {
    00101     std::setlocale(LC_NUMERIC, __sav);
    00102     delete [] __sav;
    00103       }
    00104 #endif
    00105     return __ret;
    00106   }
    00107
    00108 _GLIBCXX_END_NAMESPACE
    00109
    00110 #endif