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Diffstat (limited to 'contrib/libstdc++/include/ext/numeric')
| -rw-r--r-- | contrib/libstdc++/include/ext/numeric | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/contrib/libstdc++/include/ext/numeric b/contrib/libstdc++/include/ext/numeric new file mode 100644 index 0000000..601cb82 --- /dev/null +++ b/contrib/libstdc++/include/ext/numeric @@ -0,0 +1,136 @@ +// Numeric extensions -*- C++ -*- + +// Copyright (C) 2002 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, +// 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). You should only + * include this header if you are using GCC 3 or later. + */ + +#ifndef _EXT_NUMERIC +#define _EXT_NUMERIC + +#pragma GCC system_header +#include <bits/concept_check.h> +#include <numeric> + +#include <ext/functional> // For identity_element + +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>()); } + + // 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); } + + template<typename _Tp, typename _Integer> + inline _Tp + power(_Tp __x, _Integer __n) + { return __power(__x, __n); } + + // 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 + __glibcpp_function_requires(_Mutable_ForwardIteratorConcept<_ForwardIter>) + __glibcpp_function_requires(_ConvertibleConcept<_Tp, + typename std::iterator_traits<_ForwardIter>::value_type>) + + while (__first != __last) + *__first++ = __value++; + } + +} // namespace __gnu_cxx + +#endif /* _EXT_NUMERIC */ + |
