00001 // -*- C++ -*- C math library. 00002 00003 // Copyright (C) 2000, 2003, 2004, 2006 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 2, 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 // You should have received a copy of the GNU General Public License along 00017 // with this library; see the file COPYING. If not, write to the Free 00018 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 00019 // USA. 00020 00021 // As a special exception, you may use this file as part of a free software 00022 // library without restriction. Specifically, if other files instantiate 00023 // templates or use macros or inline functions from this file, or you compile 00024 // this file and link it with other files to produce an executable, this 00025 // file does not by itself cause the resulting executable to be covered by 00026 // the GNU General Public License. This exception does not however 00027 // invalidate any other reasons why the executable file might be covered by 00028 // the GNU General Public License. 00029 00030 // This file was written by Gabriel Dos Reis <gdr@codesourcery.com> 00031 00032 /** @file cmath.tcc 00033 * This is a Standard C++ Library file. 00034 */ 00035 00036 #ifndef _GLIBCXX_CMATH_TCC 00037 #define _GLIBCXX_CMATH_TCC 1 00038 00039 _GLIBCXX_BEGIN_NAMESPACE(std) 00040 00041 template<typename _Tp> 00042 inline _Tp 00043 __cmath_power(_Tp __x, unsigned int __n) 00044 { 00045 _Tp __y = __n % 2 ? __x : 1; 00046 00047 while (__n >>= 1) 00048 { 00049 __x = __x * __x; 00050 if (__n % 2) 00051 __y = __y * __x; 00052 } 00053 00054 return __y; 00055 } 00056 00057 _GLIBCXX_END_NAMESPACE 00058 00059 #endif