c_locale.h revision 117397 
1// Wrapper for underlying C-language localization -*- C++ -*-
2
3// Copyright (C) 2001, 2002, 2003 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 _CPP_BITS_C_LOCALE_H
37#define _CPP_BITS_C_LOCALE_H 1
38
39#pragma GCC system_header
40
41#include <clocale>
42#include <langinfo.h>		// For codecvt
43#include <iconv.h>		// For codecvt using iconv, iconv_t
44#include <libintl.h> 		// For messages
45
46#define _GLIBCPP_C_LOCALE_GNU 1
47
48#define _GLIBCPP_NUM_CATEGORIES 6
49
50#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
51namespace __gnu_cxx
52{
53  extern "C" __typeof(uselocale) __uselocale;
54}
55#endif
56
57namespace std
58{
59  typedef __locale_t		__c_locale;
60
61  // Convert numeric value of type _Tv to string and return length of
62  // string.  If snprintf is available use it, otherwise fall back to
63  // the unsafe sprintf which, in general, can be dangerous and should
64  // be avoided.
65  template<typename _Tv>
66    int
67    __convert_from_v(char* __out, const int __size, const char* __fmt,
68#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
69		     _Tv __v, const __c_locale& __cloc, int __prec = -1)
70    {
71      __c_locale __old = __gnu_cxx::__uselocale(__cloc);
72#else
73		     _Tv __v, const __c_locale&, int __prec = -1)
74    {
75      char* __old = setlocale(LC_ALL, NULL);
76      char* __sav = static_cast<char*>(malloc(strlen(__old) + 1));
77      if (__sav)
78        strcpy(__sav, __old);
79      setlocale(LC_ALL, "C");
80#endif
81
82      int __ret;
83#ifdef _GLIBCPP_USE_C99
84      if (__prec >= 0)
85        __ret = snprintf(__out, __size, __fmt, __prec, __v);
86      else
87        __ret = snprintf(__out, __size, __fmt, __v);
88#else
89      if (__prec >= 0)
90        __ret = sprintf(__out, __fmt, __prec, __v);
91      else
92        __ret = sprintf(__out, __fmt, __v);
93#endif
94
95#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
96      __gnu_cxx::__uselocale(__old);
97#else
98      setlocale(LC_ALL, __sav);
99      free(__sav);
100#endif
101      return __ret;
102    }
103}
104
105#endif
106