cmath.tcc

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00001 // -*- C++ -*- C math library.
00002 
00003 // Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
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 2, 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 // You should have received a copy of the GNU General Public License
00018 // along with this library; see the file COPYING.  If not, write to
00019 // the Free Software Foundation, 51 Franklin Street, Fifth Floor,
00020 // Boston, MA 02110-1301, USA.
00021 
00022 // As a special exception, you may use this file as part of a free software
00023 // library without restriction.  Specifically, if other files instantiate
00024 // templates or use macros or inline functions from this file, or you compile
00025 // this file and link it with other files to produce an executable, this
00026 // file does not by itself cause the resulting executable to be covered by
00027 // the GNU General Public License.  This exception does not however
00028 // invalidate any other reasons why the executable file might be covered by
00029 // the GNU General Public License.
00030 
00031 // This file was written by Gabriel Dos Reis <gdr@codesourcery.com>
00032 
00033 /** @file cmath.tcc
00034  *  This is a Standard C++ Library file.
00035  */
00036 
00037 #ifndef _GLIBCXX_CMATH_TCC
00038 #define _GLIBCXX_CMATH_TCC 1
00039 
00040 _GLIBCXX_BEGIN_NAMESPACE(std)
00041 
00042   template<typename _Tp>
00043     inline _Tp
00044     __cmath_power(_Tp __x, unsigned int __n)
00045     {
00046       _Tp __y = __n % 2 ? __x : _Tp(1);
00047 
00048       while (__n >>= 1)
00049         {
00050           __x = __x * __x;
00051           if (__n % 2)
00052             __y = __y * __x;
00053         }
00054 
00055       return __y;
00056     }
00057 
00058 _GLIBCXX_END_NAMESPACE
00059 
00060 #endif

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