fa30fe72d1
* include/ext/algorithm, include/ext/debug_allocator.h, include/ext/enc_filebuf.h, include/ext/functional, include/ext/hash_fun.h, include/ext/hash_map, include/ext/hash_set, include/ext/hashtable.h, include/ext/iterator, include/ext/malloc_allocator.h, include/ext/memory, include/ext/mt_allocator.h, include/ext/numeric, include/ext/pod_char_traits.h, include/ext/pool_allocator.h, include/ext/rb_tree, include/ext/rope, include/ext/ropeimpl.h, include/ext/slist, include/ext/stdio_filebuf.h, include/ext/stdio_sync_filebuf.h: Remove trailing whitespace. From-SVN: r74464
149 lines
4.8 KiB
C++
149 lines
4.8 KiB
C++
// Numeric extensions -*- C++ -*-
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// Copyright (C) 2002 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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/*
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*
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* Copyright (c) 1994
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* Hewlett-Packard Company
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Hewlett-Packard Company makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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*
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* Copyright (c) 1996
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* Silicon Graphics Computer Systems, Inc.
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Silicon Graphics makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*/
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/** @file ext/numeric
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* This file is a GNU extension to the Standard C++ Library (possibly
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* containing extensions from the HP/SGI STL subset). You should only
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* include this header if you are using GCC 3 or later.
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*/
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#ifndef _EXT_NUMERIC
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#define _EXT_NUMERIC 1
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#pragma GCC system_header
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#include <bits/concept_check.h>
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#include <numeric>
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#include <ext/functional> // For identity_element
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namespace __gnu_cxx
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{
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// Returns __x ** __n, where __n >= 0. _Note that "multiplication"
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// is required to be associative, but not necessarily commutative.
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template<typename _Tp, typename _Integer, typename _MonoidOperation>
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_Tp
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__power(_Tp __x, _Integer __n, _MonoidOperation __monoid_op)
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{
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if (__n == 0)
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return identity_element(__monoid_op);
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else {
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while ((__n & 1) == 0) {
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__n >>= 1;
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__x = __monoid_op(__x, __x);
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}
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_Tp __result = __x;
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__n >>= 1;
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while (__n != 0) {
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__x = __monoid_op(__x, __x);
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if ((__n & 1) != 0)
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__result = __monoid_op(__result, __x);
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__n >>= 1;
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}
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return __result;
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}
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}
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template<typename _Tp, typename _Integer>
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inline _Tp
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__power(_Tp __x, _Integer __n)
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{ return __power(__x, __n, std::multiplies<_Tp>()); }
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/**
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* This is an SGI extension.
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* @ingroup SGIextensions
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* @doctodo
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*/
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// Alias for the internal name __power. Note that power is an extension,
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// not part of the C++ standard.
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template<typename _Tp, typename _Integer, typename _MonoidOperation>
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inline _Tp
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power(_Tp __x, _Integer __n, _MonoidOperation __monoid_op)
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{ return __power(__x, __n, __monoid_op); }
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/**
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* This is an SGI extension.
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* @ingroup SGIextensions
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* @doctodo
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*/
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template<typename _Tp, typename _Integer>
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inline _Tp
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power(_Tp __x, _Integer __n)
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{ return __power(__x, __n); }
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/**
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* This is an SGI extension.
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* @ingroup SGIextensions
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* @doctodo
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*/
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// iota is not part of the C++ standard. It is an extension.
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template<typename _ForwardIter, typename _Tp>
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void
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iota(_ForwardIter __first, _ForwardIter __last, _Tp __value)
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{
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// concept requirements
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__glibcxx_function_requires(_Mutable_ForwardIteratorConcept<_ForwardIter>)
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__glibcxx_function_requires(_ConvertibleConcept<_Tp,
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typename std::iterator_traits<_ForwardIter>::value_type>)
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while (__first != __last)
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*__first++ = __value++;
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}
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} // namespace __gnu_cxx
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#endif
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