cmath.tcc Source File

00001 // -*- C++ -*- C math library.
00002 
00003 // Copyright (C) 2000 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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 #ifndef _CPP_BITS_CMATH_TCC
00033 #define _CPP_BITS_CMATH_TCC 1
00034 
00035 namespace std 
00036 {
00037   export template<typename _Tp>
00038     _Tp
00039     __cmath_power(_Tp __x, unsigned int __n)
00040     {
00041       _Tp __y = __n % 2 ? __x : 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 
00054 #endif