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115 lines
3.2 KiB
115 lines
3.2 KiB
3 years ago
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// Wrapper for underlying C-language localization -*- C++ -*-
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// Copyright (C) 2001-2021 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file bits/c++locale.h
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{locale}
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*/
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//
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// ISO C++ 14882: 22.8 Standard locale categories.
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//
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// Written by Benjamin Kosnik <bkoz@redhat.com>
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#ifndef _GLIBCXX_CXX_LOCALE_H
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#define _GLIBCXX_CXX_LOCALE_H 1
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#pragma GCC system_header
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#include <clocale>
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#define _GLIBCXX_C_LOCALE_GNU 1
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#define _GLIBCXX_NUM_CATEGORIES 6
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#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
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namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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extern "C" __typeof(uselocale) __uselocale;
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace
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#endif
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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typedef __locale_t __c_locale;
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// Convert numeric value of type double and long double to string and
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// return length of string. If vsnprintf is available use it, otherwise
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// fall back to the unsafe vsprintf which, in general, can be dangerous
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// and should be avoided.
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inline int
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__convert_from_v(const __c_locale& __cloc __attribute__ ((__unused__)),
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char* __out,
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const int __size __attribute__ ((__unused__)),
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const char* __fmt, ...)
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{
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#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
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__c_locale __old = __gnu_cxx::__uselocale(__cloc);
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#else
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char* __old = std::setlocale(LC_NUMERIC, 0);
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char* __sav = 0;
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if (__builtin_strcmp(__old, "C"))
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{
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const size_t __len = __builtin_strlen(__old) + 1;
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__sav = new char[__len];
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__builtin_memcpy(__sav, __old, __len);
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std::setlocale(LC_NUMERIC, "C");
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}
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#endif
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__builtin_va_list __args;
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__builtin_va_start(__args, __fmt);
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#if _GLIBCXX_USE_C99_STDIO
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const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args);
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#else
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const int __ret = __builtin_vsprintf(__out, __fmt, __args);
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#endif
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__builtin_va_end(__args);
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#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
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__gnu_cxx::__uselocale(__old);
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#else
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if (__sav)
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{
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std::setlocale(LC_NUMERIC, __sav);
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delete [] __sav;
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}
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#endif
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return __ret;
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}
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace
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#endif
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