1 // Wrapper for underlying C-language localization -*- C++ -*- 2 3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 4 // Free Software Foundation, Inc. 5 // 6 // This file is part of the GNU ISO C++ Library. This library is free 7 // software; you can redistribute it and/or modify it under the 8 // terms of the GNU General Public License as published by the 9 // Free Software Foundation; either version 2, or (at your option) 10 // any later version. 11 12 // This library is distributed in the hope that it will be useful, 13 // but WITHOUT ANY WARRANTY; without even the implied warranty of 14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 // GNU General Public License for more details. 16 17 // You should have received a copy of the GNU General Public License along 18 // with this library; see the file COPYING. If not, write to the Free 19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 20 // USA. 21 22 // As a special exception, you may use this file as part of a free software 23 // library without restriction. Specifically, if other files instantiate 24 // templates or use macros or inline functions from this file, or you compile 25 // this file and link it with other files to produce an executable, this 26 // file does not by itself cause the resulting executable to be covered by 27 // the GNU General Public License. This exception does not however 28 // invalidate any other reasons why the executable file might be covered by 29 // the GNU General Public License. 30 31 /** @file c++locale.h 32 * This is an internal header file, included by other library headers. 33 * You should not attempt to use it directly. 34 */ 35 36 // 37 // ISO C++ 14882: 22.8 Standard locale categories. 38 // 39 40 // Written by Benjamin Kosnik <bkoz@redhat.com> 41 42 #ifndef _C_LOCALE_H 43 #define _C_LOCALE_H 1 44 45 #pragma GCC system_header 46 47 #include <cstring> // get std::strlen 48 #include <cstdio> // get std::vsnprintf or std::vsprintf 49 #include <clocale> 50 #include <langinfo.h> // For codecvt 51 #include <iconv.h> // For codecvt using iconv, iconv_t 52 #include <libintl.h> // For messages 53 #include <cstdarg> 54 55 #define _GLIBCXX_C_LOCALE_GNU 1 56 57 #define _GLIBCXX_NUM_CATEGORIES 6 58 59 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 60 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) 61 62 extern "C" __typeof(uselocale) __uselocale; 63 64 _GLIBCXX_END_NAMESPACE 65 #endif 66 67 _GLIBCXX_BEGIN_NAMESPACE(std) 68 69 typedef __locale_t __c_locale; 70 71 // Convert numeric value of type double and long double to string and 72 // return length of string. If vsnprintf is available use it, otherwise 73 // fall back to the unsafe vsprintf which, in general, can be dangerous 74 // and should be avoided. 75 inline int 76 __convert_from_v(const __c_locale& __cloc __attribute__ ((__unused__)), 77 char* __out, 78 const int __size __attribute__ ((__unused__)), 79 const char* __fmt, ...) 80 { 81 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 82 __c_locale __old = __gnu_cxx::__uselocale(__cloc); 83 #else 84 char* __old = std::setlocale(LC_ALL, NULL); 85 size_t __sz = std::strlen(__old) + 1; 86 char* __sav = new char[__sz]; 87 std::memcpy(__sav, __old, __sz); 88 std::setlocale(LC_ALL, "C"); 89 #endif 90 91 va_list __args; 92 va_start(__args, __fmt); 93 94 #ifdef _GLIBCXX_USE_C99 95 const int __ret = std::vsnprintf(__out, __size, __fmt, __args); 96 #else 97 const int __ret = std::vsprintf(__out, __fmt, __args); 98 #endif 99 100 va_end(__args); 101 102 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 103 __gnu_cxx::__uselocale(__old); 104 #else 105 std::setlocale(LC_ALL, __sav); 106 delete [] __sav; 107 #endif 108 return __ret; 109 } 110 111 _GLIBCXX_END_NAMESPACE 112 113 #endif 114