// Numeric extensions -*- C++ -*- // Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 2, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING. If not, write to the Free // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, // USA. // As a special exception, you may use this file as part of a free software // library without restriction. Specifically, if other files instantiate // templates or use macros or inline functions from this file, or you compile // this file and link it with other files to produce an executable, this // file does not by itself cause the resulting executable to be covered by // the GNU General Public License. This exception does not however // invalidate any other reasons why the executable file might be covered by // the GNU General Public License. /* * * Copyright (c) 1994 * Hewlett-Packard Company * * Permission to use, copy, modify, distribute and sell this software * and its documentation for any purpose is hereby granted without fee, * provided that the above copyright notice appear in all copies and * that both that copyright notice and this permission notice appear * in supporting documentation. Hewlett-Packard Company makes no * representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied warranty. * * * Copyright (c) 1996 * Silicon Graphics Computer Systems, Inc. * * Permission to use, copy, modify, distribute and sell this software * and its documentation for any purpose is hereby granted without fee, * provided that the above copyright notice appear in all copies and * that both that copyright notice and this permission notice appear * in supporting documentation. Silicon Graphics makes no * representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied warranty. */ /** @file ext/numeric * This file is a GNU extension to the Standard C++ Library (possibly * containing extensions from the HP/SGI STL subset). */ #ifndef _EXT_NUMERIC #define _EXT_NUMERIC 1 #pragma GCC system_header #include <bits/concept_check.h> #include <numeric> #include <ext/functional> // For identity_element _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) // Returns __x ** __n, where __n >= 0. _Note that "multiplication" // is required to be associative, but not necessarily commutative. template<typename _Tp, typename _Integer, typename _MonoidOperation> _Tp __power(_Tp __x, _Integer __n, _MonoidOperation __monoid_op) { if (__n == 0) return identity_element(__monoid_op); else { while ((__n & 1) == 0) { __n >>= 1; __x = __monoid_op(__x, __x); } _Tp __result = __x; __n >>= 1; while (__n != 0) { __x = __monoid_op(__x, __x); if ((__n & 1) != 0) __result = __monoid_op(__result, __x); __n >>= 1; } return __result; } } template<typename _Tp, typename _Integer> inline _Tp __power(_Tp __x, _Integer __n) { return __power(__x, __n, std::multiplies<_Tp>()); } /** * This is an SGI extension. * @ingroup SGIextensions * @doctodo */ // Alias for the internal name __power. Note that power is an extension, // not part of the C++ standard. template<typename _Tp, typename _Integer, typename _MonoidOperation> inline _Tp power(_Tp __x, _Integer __n, _MonoidOperation __monoid_op) { return __power(__x, __n, __monoid_op); } /** * This is an SGI extension. * @ingroup SGIextensions * @doctodo */ template<typename _Tp, typename _Integer> inline _Tp power(_Tp __x, _Integer __n) { return __power(__x, __n); } /** * This is an SGI extension. * @ingroup SGIextensions * @doctodo */ // iota is not part of the C++ standard. It is an extension. template<typename _ForwardIter, typename _Tp> void iota(_ForwardIter __first, _ForwardIter __last, _Tp __value) { // concept requirements __glibcxx_function_requires(_Mutable_ForwardIteratorConcept<_ForwardIter>) __glibcxx_function_requires(_ConvertibleConcept<_Tp, typename std::iterator_traits<_ForwardIter>::value_type>) while (__first != __last) *__first++ = __value++; } _GLIBCXX_END_NAMESPACE #endif