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
_GLIBCXX_BEGIN_NAMESPACE(std)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