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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libstdc++-v3/include/ext/numeric
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+// Numeric extensions -*- C++ -*-
+
+// Copyright (C) 2002, 2004, 2005, 2009 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 3, 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+/*
+ *
+ * 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
+
+namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+ // 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); }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ using std::iota;
+#else
+ /**
+ * 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++;
+ }
+#endif // __GXX_EXPERIMENTAL_CXX0X__
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
+
+#endif