libstdc++
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00001 // Wrapper for underlying C-language localization -*- C++ -*- 00002 00003 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010 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 bits/c++locale.h 00027 * This is an internal header file, included by other library headers. 00028 * Do not attempt to use it directly. @headername{locale} 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 00044 #define _GLIBCXX_C_LOCALE_GNU 1 00045 00046 #define _GLIBCXX_NUM_CATEGORIES 6 00047 00048 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 00049 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 00050 { 00051 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00052 00053 extern "C" __typeof(uselocale) __uselocale; 00054 00055 _GLIBCXX_END_NAMESPACE_VERSION 00056 } // namespace 00057 #endif 00058 00059 namespace std _GLIBCXX_VISIBILITY(default) 00060 { 00061 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00062 00063 typedef __locale_t __c_locale; 00064 00065 // Convert numeric value of type double and long double to string and 00066 // return length of string. If vsnprintf is available use it, otherwise 00067 // fall back to the unsafe vsprintf which, in general, can be dangerous 00068 // and should be avoided. 00069 inline int 00070 __convert_from_v(const __c_locale& __cloc __attribute__ ((__unused__)), 00071 char* __out, 00072 const int __size __attribute__ ((__unused__)), 00073 const char* __fmt, ...) 00074 { 00075 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 00076 __c_locale __old = __gnu_cxx::__uselocale(__cloc); 00077 #else 00078 char* __old = std::setlocale(LC_NUMERIC, 0); 00079 char* __sav = 0; 00080 if (__builtin_strcmp(__old, "C")) 00081 { 00082 const size_t __len = __builtin_strlen(__old) + 1; 00083 __sav = new char[__len]; 00084 __builtin_memcpy(__sav, __old, __len); 00085 std::setlocale(LC_NUMERIC, "C"); 00086 } 00087 #endif 00088 00089 __builtin_va_list __args; 00090 __builtin_va_start(__args, __fmt); 00091 00092 #ifdef _GLIBCXX_USE_C99 00093 const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args); 00094 #else 00095 const int __ret = __builtin_vsprintf(__out, __fmt, __args); 00096 #endif 00097 00098 __builtin_va_end(__args); 00099 00100 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 00101 __gnu_cxx::__uselocale(__old); 00102 #else 00103 if (__sav) 00104 { 00105 std::setlocale(LC_NUMERIC, __sav); 00106 delete [] __sav; 00107 } 00108 #endif 00109 return __ret; 00110 } 00111 00112 _GLIBCXX_END_NAMESPACE_VERSION 00113 } // namespace 00114 00115 #endif