1 // Wrapper for underlying C-language localization -*- C++ -*-
3 // Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
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 2, or (at your option)
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.
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING. If not, write to the Free
18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
21 // As a special exception, you may use this file as part of a free software
22 // library without restriction. Specifically, if other files instantiate
23 // templates or use macros or inline functions from this file, or you compile
24 // this file and link it with other files to produce an executable, this
25 // file does not by itself cause the resulting executable to be covered by
26 // the GNU General Public License. This exception does not however
27 // invalidate any other reasons why the executable file might be covered by
28 // the GNU General Public License.
31 // ISO C++ 14882: 22.8 Standard locale categories.
34 // Written by Benjamin Kosnik <bkoz@redhat.com>
39 #pragma GCC system_header
42 #include <cstring> // get std::strlen
43 #include <cstdio> // get std::snprintf or std::sprintf
45 #define _GLIBCXX_NUM_CATEGORIES 0
49 typedef int* __c_locale
;
51 // Convert numeric value of type _Tv to string and return length of
52 // string. If snprintf is available use it, otherwise fall back to
53 // the unsafe sprintf which, in general, can be dangerous and should
55 template<typename _Tv
>
57 __convert_from_v(char* __out
,
58 const int __size
__attribute__((__unused__
)),
60 _Tv __v
, const __c_locale
&, int __prec
)
62 char* __old
= std::setlocale(LC_NUMERIC
, NULL
);
64 if (std::strcmp(__old
, "C"))
66 __sav
= new char[std::strlen(__old
) + 1];
67 std::strcpy(__sav
, __old
);
68 std::setlocale(LC_NUMERIC
, "C");
71 #ifdef _GLIBCXX_USE_C99
72 const int __ret
= std::snprintf(__out
, __size
, __fmt
, __prec
, __v
);
74 const int __ret
= std::sprintf(__out
, __fmt
, __prec
, __v
);
79 std::setlocale(LC_NUMERIC
, __sav
);