libstdc++
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00001 // Wrapper for underlying C-language localization -*- C++ -*- 00002 00003 // Copyright (C) 2001-2013 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 3, 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 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 /** @file bits/c++locale.h 00026 * This is an internal header file, included by other library headers. 00027 * Do not attempt to use it directly. @headername{locale} 00028 */ 00029 00030 // 00031 // ISO C++ 14882: 22.8 Standard locale categories. 00032 // 00033 00034 // Written by Benjamin Kosnik <bkoz@redhat.com> 00035 00036 #ifndef _GLIBCXX_CXX_LOCALE_H 00037 #define _GLIBCXX_CXX_LOCALE_H 1 00038 00039 #pragma GCC system_header 00040 00041 #include <clocale> 00042 00043 #define _GLIBCXX_C_LOCALE_GNU 1 00044 00045 #define _GLIBCXX_NUM_CATEGORIES 6 00046 00047 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 00048 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 00049 { 00050 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00051 00052 extern "C" __typeof(uselocale) __uselocale; 00053 00054 _GLIBCXX_END_NAMESPACE_VERSION 00055 } // namespace 00056 #endif 00057 00058 namespace std _GLIBCXX_VISIBILITY(default) 00059 { 00060 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00061 00062 typedef __locale_t __c_locale; 00063 00064 // Convert numeric value of type double and long double to string and 00065 // return length of string. If vsnprintf is available use it, otherwise 00066 // fall back to the unsafe vsprintf which, in general, can be dangerous 00067 // and should be avoided. 00068 inline int 00069 __convert_from_v(const __c_locale& __cloc __attribute__ ((__unused__)), 00070 char* __out, 00071 const int __size __attribute__ ((__unused__)), 00072 const char* __fmt, ...) 00073 { 00074 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 00075 __c_locale __old = __gnu_cxx::__uselocale(__cloc); 00076 #else 00077 char* __old = std::setlocale(LC_NUMERIC, 0); 00078 char* __sav = 0; 00079 if (__builtin_strcmp(__old, "C")) 00080 { 00081 const size_t __len = __builtin_strlen(__old) + 1; 00082 __sav = new char[__len]; 00083 __builtin_memcpy(__sav, __old, __len); 00084 std::setlocale(LC_NUMERIC, "C"); 00085 } 00086 #endif 00087 00088 __builtin_va_list __args; 00089 __builtin_va_start(__args, __fmt); 00090 00091 #ifdef _GLIBCXX_USE_C99 00092 const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args); 00093 #else 00094 const int __ret = __builtin_vsprintf(__out, __fmt, __args); 00095 #endif 00096 00097 __builtin_va_end(__args); 00098 00099 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 00100 __gnu_cxx::__uselocale(__old); 00101 #else 00102 if (__sav) 00103 { 00104 std::setlocale(LC_NUMERIC, __sav); 00105 delete [] __sav; 00106 } 00107 #endif 00108 return __ret; 00109 } 00110 00111 _GLIBCXX_END_NAMESPACE_VERSION 00112 } // namespace 00113 00114 #endif