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 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