1// Wrapper for underlying C-language localization -*- C++ -*- 
2 
3// Copyright (C) 2001-2019 Free Software Foundation, Inc. 
4// 
5// This file is part of the GNU ISO C++ Library. This library is free 
6// software; you can redistribute it and/or modify it under the 
7// terms of the GNU General Public License as published by the 
8// Free Software Foundation; either version 3, or (at your option) 
9// any later version. 
10 
11// This library is distributed in the hope that it will be useful, 
12// but WITHOUT ANY WARRANTY; without even the implied warranty of 
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
14// GNU General Public License for more details. 
15 
16// Under Section 7 of GPL version 3, you are granted additional 
17// permissions described in the GCC Runtime Library Exception, version 
18// 3.1, as published by the Free Software Foundation. 
19 
20// You should have received a copy of the GNU General Public License and 
21// a copy of the GCC Runtime Library Exception along with this program; 
22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 
23// <http://www.gnu.org/licenses/>. 
24 
25/** @file bits/c++locale.h 
26 * This is an internal header file, included by other library headers. 
27 * Do not attempt to use it directly. @headername{locale} 
28 */ 
29 
30// 
31// ISO C++ 14882: 22.8 Standard locale categories. 
32// 
33 
34// Written by Benjamin Kosnik <bkoz@redhat.com> 
35 
36#ifndef _GLIBCXX_CXX_LOCALE_H 
37#define _GLIBCXX_CXX_LOCALE_H 1 
38 
39#pragma GCC system_header 
40 
41#include <clocale> 
42 
43#define _GLIBCXX_C_LOCALE_GNU 1 
44 
45#define _GLIBCXX_NUM_CATEGORIES 6 
46 
47#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 
48namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 
49{ 
50_GLIBCXX_BEGIN_NAMESPACE_VERSION 
51 
52 extern "C" __typeof(uselocale) __uselocale; 
53 
54_GLIBCXX_END_NAMESPACE_VERSION 
55} // namespace 
56#endif 
57 
58namespace std _GLIBCXX_VISIBILITY(default) 
59{ 
60_GLIBCXX_BEGIN_NAMESPACE_VERSION 
61 
62 typedef __locale_t __c_locale; 
63 
64 // Convert numeric value of type double and long double to string and 
65 // return length of string. If vsnprintf is available use it, otherwise 
66 // fall back to the unsafe vsprintf which, in general, can be dangerous 
67 // and should be avoided. 
68 inline int 
69 __convert_from_v(const __c_locale& __cloc __attribute__ ((__unused__)), 
70 char* __out, 
71 const int __size __attribute__ ((__unused__)), 
72 const char* __fmt, ...) 
73 { 
74#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 
75 __c_locale __old = __gnu_cxx::__uselocale(__cloc); 
76#else 
77 char* __old = std::setlocale(LC_NUMERIC, 0); 
78 char* __sav = 0; 
79 if (__builtin_strcmp(__old, "C")) 
80 { 
81 const size_t __len = __builtin_strlen(__old) + 1; 
82 __sav = new char[__len]; 
83 __builtin_memcpy(__sav, __old, __len); 
84 std::setlocale(LC_NUMERIC, "C"); 
85 } 
86#endif 
87 
88 __builtin_va_list __args; 
89 __builtin_va_start(__args, __fmt); 
90 
91#if _GLIBCXX_USE_C99_STDIO 
92 const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args); 
93#else 
94 const int __ret = __builtin_vsprintf(__out, __fmt, __args); 
95#endif 
96 
97 __builtin_va_end(__args); 
98 
99#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) 
100 __gnu_cxx::__uselocale(__old); 
101#else 
102 if (__sav) 
103 { 
104 std::setlocale(LC_NUMERIC, __sav); 
105 delete [] __sav; 
106 } 
107#endif 
108 return __ret; 
109 } 
110 
111_GLIBCXX_END_NAMESPACE_VERSION 
112} // namespace 
113 
114#endif 
115