c++locale.h

00001 // Wrapper for underlying C-language localization -*- C++ -*-
00002 
00003 // Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
00004 //
00005 // This file is part of the GNU ISO C++ Library.  This library is free
00006 // software; you can redistribute it and/or modify it under the
00007 // terms of the GNU General Public License as published by the
00008 // Free Software Foundation; either version 2, or (at your option)
00009 // any later version.
00010 
00011 // This library is distributed in the hope that it will be useful,
00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014 // GNU General Public License for more details.
00015 
00016 // You should have received a copy of the GNU General Public License along
00017 // with this library; see the file COPYING.  If not, write to the Free
00018 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
00019 // USA.
00020 
00021 // As a special exception, you may use this file as part of a free software
00022 // library without restriction.  Specifically, if other files instantiate
00023 // templates or use macros or inline functions from this file, or you compile
00024 // this file and link it with other files to produce an executable, this
00025 // file does not by itself cause the resulting executable to be covered by
00026 // the GNU General Public License.  This exception does not however
00027 // invalidate any other reasons why the executable file might be covered by
00028 // the GNU General Public License.
00029 
00030 //
00031 // ISO C++ 14882: 22.8  Standard locale categories.
00032 //
00033 
00034 // Written by Benjamin Kosnik <bkoz@redhat.com>
00035 
00036 #ifndef _CPP_BITS_C_LOCALE_H
00037 #define _CPP_BITS_C_LOCALE_H 1
00038 
00039 #pragma GCC system_header
00040 
00041 #include <clocale>
00042 #include <langinfo.h>       // For codecvt
00043 #include <iconv.h>      // For codecvt using iconv, iconv_t
00044 #include <libintl.h>        // For messages
00045 
00046 #define _GLIBCPP_C_LOCALE_GNU 1
00047 
00048 #define _GLIBCPP_NUM_CATEGORIES 6
00049 
00050 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
00051 namespace __gnu_cxx
00052 {
00053   extern "C" __typeof(uselocale) __uselocale;
00054 }
00055 #endif
00056 
00057 namespace std
00058 {
00059   typedef __locale_t        __c_locale;
00060 
00061   // Convert numeric value of type _Tv to string and return length of
00062   // string.  If snprintf is available use it, otherwise fall back to
00063   // the unsafe sprintf which, in general, can be dangerous and should
00064   // be avoided.
00065   template<typename _Tv>
00066     int
00067     __convert_from_v(char* __out, const int __size, const char* __fmt,
00068 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
00069              _Tv __v, const __c_locale& __cloc, int __prec = -1)
00070     {
00071       __c_locale __old = __gnu_cxx::__uselocale(__cloc);
00072 #else
00073              _Tv __v, const __c_locale&, int __prec = -1)
00074     {
00075       char* __old = setlocale(LC_ALL, NULL);
00076       char* __sav = static_cast<char*>(malloc(strlen(__old) + 1));
00077       if (__sav)
00078         strcpy(__sav, __old);
00079       setlocale(LC_ALL, "C");
00080 #endif
00081 
00082       int __ret;
00083 #ifdef _GLIBCPP_USE_C99
00084       if (__prec >= 0)
00085         __ret = snprintf(__out, __size, __fmt, __prec, __v);
00086       else
00087         __ret = snprintf(__out, __size, __fmt, __v);
00088 #else
00089       if (__prec >= 0)
00090         __ret = sprintf(__out, __fmt, __prec, __v);
00091       else
00092         __ret = sprintf(__out, __fmt, __v);
00093 #endif
00094 
00095 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
00096       __gnu_cxx::__uselocale(__old);
00097 #else
00098       setlocale(LC_ALL, __sav);
00099       free(__sav);
00100 #endif
00101       return __ret;
00102     }
00103 }
00104 
00105 #endif

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