libstdc++
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00001 // TR2 <ratio> -*- C++ -*- 00002 00003 // Copyright (C) 2010, 2011 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 3, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 /** @file tr2/ratio 00026 * This is a TR2 C++ Library header. 00027 */ 00028 00029 #include <ratio> 00030 00031 namespace std _GLIBCXX_VISIBILITY(default) 00032 { 00033 namespace tr2 00034 { 00035 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00036 00037 template<intmax_t _Pn, size_t _Bit, 00038 bool = _Bit < static_cast<size_t> 00039 (std::numeric_limits<intmax_t>::digits)> 00040 struct __safe_lshift 00041 { static const intmax_t __value = 0; }; 00042 00043 template<intmax_t _Pn, size_t _Bit> 00044 struct __safe_lshift<_Pn, _Bit, true> 00045 { static const intmax_t __value = _Pn << _Bit; }; 00046 00047 /// Add binary prefixes (IEC 60027-2 A.2 and ISO/IEC 80000). 00048 typedef ratio<__safe_lshift<1, 10>::__value, 1> kibi; 00049 typedef ratio<__safe_lshift<1, 20>::__value, 1> mebi; 00050 typedef ratio<__safe_lshift<1, 30>::__value, 1> gibi; 00051 typedef ratio<__safe_lshift<1, 40>::__value, 1> tebi; 00052 typedef ratio<__safe_lshift<1, 50>::__value, 1> pebi; 00053 typedef ratio<__safe_lshift<1, 60>::__value, 1> exbi; 00054 //typedef ratio<__safe_lshift<1, 70>::__value, 1> zebi; 00055 //typedef ratio<__safe_lshift<1, 80>::__value, 1> yobi; 00056 00057 _GLIBCXX_END_NAMESPACE_VERSION 00058 } 00059 }