cmath.tcc revision 285830
1// -*- C++ -*- C math library. 2 3// Copyright (C) 2000, 2003, 2004, 2006 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 2, 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// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING. If not, write to the Free 18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19// USA. 20 21// As a special exception, you may use this file as part of a free software 22// library without restriction. Specifically, if other files instantiate 23// templates or use macros or inline functions from this file, or you compile 24// this file and link it with other files to produce an executable, this 25// file does not by itself cause the resulting executable to be covered by 26// the GNU General Public License. This exception does not however 27// invalidate any other reasons why the executable file might be covered by 28// the GNU General Public License. 29 30// This file was written by Gabriel Dos Reis <gdr@codesourcery.com> 31 32/** @file cmath.tcc 33 * This is a Standard C++ Library file. 34 */ 35 36#ifndef _GLIBCXX_CMATH_TCC 37#define _GLIBCXX_CMATH_TCC 1 38 39_GLIBCXX_BEGIN_NAMESPACE(std) 40 41 template<typename _Tp> 42 inline _Tp 43 __cmath_power(_Tp __x, unsigned int __n) 44 { 45 _Tp __y = __n % 2 ? __x : 1; 46 47 while (__n >>= 1) 48 { 49 __x = __x * __x; 50 if (__n % 2) 51 __y = __y * __x; 52 } 53 54 return __y; 55 } 56 57_GLIBCXX_END_NAMESPACE 58 59#endif 60