Merge branch 'master' of ssh://crater.dragonflybsd.org/repository/git/dragonfly
[dragonfly.git] / contrib / gcc-3.4 / libstdc++-v3 / config / locale / generic / c_locale.h
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1// Wrapper for underlying C-language localization -*- C++ -*-
2
3// Copyright (C) 2001, 2002, 2003, 2004 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 2, 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// 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
19// USA.
20
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.
29
30//
31// ISO C++ 14882: 22.8 Standard locale categories.
32//
33
34// Written by Benjamin Kosnik <bkoz@redhat.com>
35
36#ifndef _C_LOCALE_H
37#define _C_LOCALE_H 1
38
39#pragma GCC system_header
40
41#include <clocale>
42#include <cstring> // get std::strlen
43#include <cstdio> // get std::snprintf or std::sprintf
44
45#define _GLIBCXX_NUM_CATEGORIES 0
46
47namespace std
48{
49 typedef int* __c_locale;
50
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
54 // be avoided.
55 template<typename _Tv>
56 int
57 __convert_from_v(char* __out,
58 const int __size __attribute__((__unused__)),
59 const char* __fmt,
3a327f56 60 _Tv __v, const __c_locale&, int __prec)
003757ed 61 {
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62 char* __old = std::setlocale(LC_NUMERIC, NULL);
63 char* __sav = NULL;
64 if (std::strcmp(__old, "C"))
65 {
66 __sav = new char[std::strlen(__old) + 1];
67 std::strcpy(__sav, __old);
68 std::setlocale(LC_NUMERIC, "C");
69 }
003757ed 70
003757ed 71#ifdef _GLIBCXX_USE_C99
3a327f56 72 const int __ret = std::snprintf(__out, __size, __fmt, __prec, __v);
003757ed 73#else
3a327f56 74 const int __ret = std::sprintf(__out, __fmt, __prec, __v);
003757ed 75#endif
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76
77 if (__sav)
78 {
79 std::setlocale(LC_NUMERIC, __sav);
80 delete [] __sav;
81 }
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82 return __ret;
83 }
84}
85
86#endif