# 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
    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 2, 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 // You should have received a copy of the GNU General Public License along
    00018 // with this library; see the file COPYING.  If not, write to the Free
    00019 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
    00020 // USA.
    00021
    00022 // As a special exception, you may use this file as part of a free software
    00023 // library without restriction.  Specifically, if other files instantiate
    00024 // templates or use macros or inline functions from this file, or you compile
    00025 // this file and link it with other files to produce an executable, this
    00026 // file does not by itself cause the resulting executable to be covered by
    00027 // the GNU General Public License.  This exception does not however
    00028 // invalidate any other reasons why the executable file might be covered by
    00029 // the GNU General Public License.
    00030
    00031 /** @file c++locale.h
    00032  *  This is an internal header file, included by other library headers.
    00033  *  You should not attempt to use it directly.
    00034  */
    00035
    00036 //
    00037 // ISO C++ 14882: 22.8  Standard locale categories.
    00038 //
    00039
    00040 // Written by Benjamin Kosnik <bkoz@redhat.com>
    00041
    00042 #ifndef _C_LOCALE_H
    00043 #define _C_LOCALE_H 1
    00044
    00045 #pragma GCC system_header
    00046
    00047 #include <cstring>              // get std::strlen
    00048 #include <cstdio>               // get std::vsnprintf or std::vsprintf
    00049 #include <clocale>
    00050 #include <langinfo.h>       // For codecvt
    00051 #include <iconv.h>      // For codecvt using iconv, iconv_t
    00052 #include <libintl.h>        // For messages
    00053 #include <cstdarg>
    00054
    00055 #define _GLIBCXX_C_LOCALE_GNU 1
    00056
    00057 #define _GLIBCXX_NUM_CATEGORIES 6
    00058
    00059 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
    00060 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
    00061
    00062   extern "C" __typeof(uselocale) __uselocale;
    00063
    00064 _GLIBCXX_END_NAMESPACE
    00065 #endif
    00066
    00067 _GLIBCXX_BEGIN_NAMESPACE(std)
    00068
    00069   typedef __locale_t        __c_locale;
    00070
    00071   // Convert numeric value of type double and long double to string and
    00072   // return length of string.  If vsnprintf is available use it, otherwise
    00073   // fall back to the unsafe vsprintf which, in general, can be dangerous
    00074   // and should be avoided.
    00075   inline int
    00076   __convert_from_v(const __c_locale& __cloc __attribute__ ((__unused__)),
    00077            char* __out,
    00078            const int __size __attribute__ ((__unused__)),
    00079            const char* __fmt, ...)
    00080   {
    00081 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
    00082     __c_locale __old = __gnu_cxx::__uselocale(__cloc);
    00083 #else
    00084     char* __old = std::setlocale(LC_ALL, NULL);
    00085     char* __sav = new char[std::strlen(__old) + 1];
    00086     std::strcpy(__sav, __old);
    00087     std::setlocale(LC_ALL, "C");
    00088 #endif
    00089
    00090     va_list __args;
    00091     va_start(__args, __fmt);
    00092
    00093 #ifdef _GLIBCXX_USE_C99
    00094     const int __ret = std::vsnprintf(__out, __size, __fmt, __args);
    00095 #else
    00096     const int __ret = std::vsprintf(__out, __fmt, __args);
    00097 #endif
    00098
    00099     va_end(__args);
    00100
    00101 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
    00102     __gnu_cxx::__uselocale(__old);
    00103 #else
    00104     std::setlocale(LC_ALL, __sav);
    00105     delete [] __sav;
    00106 #endif
    00107     return __ret;
    00108   }
    00109
    00110 _GLIBCXX_END_NAMESPACE
    00111
    00112 #endif