[1166] | 1 | // Wrapper for underlying C-language localization -*- C++ -*-
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| 2 |
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| 3 | // Copyright (C) 2001-2021 Free Software Foundation, Inc.
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| 4 | //
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| 5 | // This file is part of the GNU ISO C++ Library. This library is free
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| 6 | // software; you can redistribute it and/or modify it under the
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| 7 | // terms of the GNU General Public License as published by the
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| 8 | // Free Software Foundation; either version 3, or (at your option)
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| 9 | // any later version.
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| 10 |
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| 11 | // This library is distributed in the hope that it will be useful,
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| 12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | // GNU General Public License for more details.
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| 15 |
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| 16 | // Under Section 7 of GPL version 3, you are granted additional
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| 17 | // permissions described in the GCC Runtime Library Exception, version
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| 18 | // 3.1, as published by the Free Software Foundation.
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| 19 |
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| 20 | // You should have received a copy of the GNU General Public License and
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| 21 | // a copy of the GCC Runtime Library Exception along with this program;
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| 22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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| 23 | // <http://www.gnu.org/licenses/>.
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| 24 |
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| 25 | /** @file bits/c++locale.h
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| 26 | * This is an internal header file, included by other library headers.
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| 27 | * Do not attempt to use it directly. @headername{locale}
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| 28 | */
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| 29 |
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| 30 | //
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| 31 | // ISO C++ 14882: 22.8 Standard locale categories.
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| 32 | //
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| 33 |
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| 34 | // Written by Benjamin Kosnik <bkoz@redhat.com>
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| 35 |
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| 36 | #ifndef _GLIBCXX_CXX_LOCALE_H
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| 37 | #define _GLIBCXX_CXX_LOCALE_H 1
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| 38 |
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| 39 | #pragma GCC system_header
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| 40 |
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| 41 | #include <clocale>
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| 42 |
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| 43 | #define _GLIBCXX_NUM_CATEGORIES 0
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| 44 |
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| 45 | namespace std _GLIBCXX_VISIBILITY(default)
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| 46 | {
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| 47 | _GLIBCXX_BEGIN_NAMESPACE_VERSION
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| 48 |
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| 49 | typedef int* __c_locale;
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| 50 |
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| 51 | // Convert numeric value of type double and long double to string and
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| 52 | // return length of string. If vsnprintf is available use it, otherwise
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| 53 | // fall back to the unsafe vsprintf which, in general, can be dangerous
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| 54 | // and should be avoided.
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| 55 | inline int
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| 56 | __convert_from_v(const __c_locale&, char* __out,
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| 57 | const int __size __attribute__((__unused__)),
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| 58 | const char* __fmt, ...)
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| 59 | {
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| 60 | char* __old = std::setlocale(LC_NUMERIC, 0);
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| 61 | char* __sav = 0;
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| 62 | if (__builtin_strcmp(__old, "C"))
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| 63 | {
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| 64 | const size_t __len = __builtin_strlen(__old) + 1;
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| 65 | __sav = new char[__len];
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| 66 | __builtin_memcpy(__sav, __old, __len);
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| 67 | std::setlocale(LC_NUMERIC, "C");
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| 68 | }
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| 69 |
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| 70 | __builtin_va_list __args;
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| 71 | __builtin_va_start(__args, __fmt);
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| 72 |
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| 73 | #if _GLIBCXX_USE_C99_STDIO && !_GLIBCXX_HAVE_BROKEN_VSNPRINTF
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| 74 | const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args);
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| 75 | #else
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| 76 | const int __ret = __builtin_vsprintf(__out, __fmt, __args);
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| 77 | #endif
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| 78 |
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| 79 | __builtin_va_end(__args);
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| 80 |
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| 81 | if (__sav)
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| 82 | {
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| 83 | std::setlocale(LC_NUMERIC, __sav);
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| 84 | delete [] __sav;
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| 85 | }
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| 86 | return __ret;
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| 87 | }
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| 88 |
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| 89 | _GLIBCXX_END_NAMESPACE_VERSION
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| 90 | } // namespace
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| 91 |
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| 92 | #endif
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