1 // TR2 <ratio> -*- C++ -*- 2 3 // Copyright (C) 2010-2013 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 3, 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 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 /** @file tr2/ratio 26 * This is a TR2 C++ Library header. 27 */ 28 29 #include <ratio> 30 31 namespace std _GLIBCXX_VISIBILITY(default) 32 { 33 namespace tr2 34 { 35 _GLIBCXX_BEGIN_NAMESPACE_VERSION 36 37 template<intmax_t _Pn, size_t _Bit, 38 bool = _Bit < static_cast<size_t> 39 (std::numeric_limits<intmax_t>::digits)> 40 struct __safe_lshift 41 { static const intmax_t __value = 0; }; 42 43 template<intmax_t _Pn, size_t _Bit> 44 struct __safe_lshift<_Pn, _Bit, true> 45 { static const intmax_t __value = _Pn << _Bit; }; 46 47 /// Add binary prefixes (IEC 60027-2 A.2 and ISO/IEC 80000). 48 typedef ratio<__safe_lshift<1, 10>::__value, 1> kibi; 49 typedef ratio<__safe_lshift<1, 20>::__value, 1> mebi; 50 typedef ratio<__safe_lshift<1, 30>::__value, 1> gibi; 51 typedef ratio<__safe_lshift<1, 40>::__value, 1> tebi; 52 typedef ratio<__safe_lshift<1, 50>::__value, 1> pebi; 53 typedef ratio<__safe_lshift<1, 60>::__value, 1> exbi; 54 //typedef ratio<__safe_lshift<1, 70>::__value, 1> zebi; 55 //typedef ratio<__safe_lshift<1, 80>::__value, 1> yobi; 56 57 _GLIBCXX_END_NAMESPACE_VERSION 58 } 59 } 60
