00001 // -*- C++ -*- C math library. 00002 00003 // Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009 00004 // Free Software Foundation, Inc. 00005 // 00006 // This file is part of the GNU ISO C++ Library. This library is free 00007 // software; you can redistribute it and/or modify it under the 00008 // terms of the GNU General Public License as published by the 00009 // Free Software Foundation; either version 3, or (at your option) 00010 // any later version. 00011 00012 // This library is distributed in the hope that it will be useful, 00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 // GNU General Public License for more details. 00016 00017 // Under Section 7 of GPL version 3, you are granted additional 00018 // permissions described in the GCC Runtime Library Exception, version 00019 // 3.1, as published by the Free Software Foundation. 00020 00021 // You should have received a copy of the GNU General Public License and 00022 // a copy of the GCC Runtime Library Exception along with this program; 00023 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00024 // <http://www.gnu.org/licenses/>. 00025 00026 // This file was written by Gabriel Dos Reis <gdr@codesourcery.com> 00027 00028 /** @file cmath.tcc 00029 * This is a Standard C++ Library file. 00030 */ 00031 00032 #ifndef _GLIBCXX_CMATH_TCC 00033 #define _GLIBCXX_CMATH_TCC 1 00034 00035 _GLIBCXX_BEGIN_NAMESPACE(std) 00036 00037 template<typename _Tp> 00038 inline _Tp 00039 __cmath_power(_Tp __x, unsigned int __n) 00040 { 00041 _Tp __y = __n % 2 ? __x : _Tp(1); 00042 00043 while (__n >>= 1) 00044 { 00045 __x = __x * __x; 00046 if (__n % 2) 00047 __y = __y * __x; 00048 } 00049 00050 return __y; 00051 } 00052 00053 _GLIBCXX_END_NAMESPACE 00054 00055 #endif