# stl_numeric.h

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    00001 // Numeric functions implementation -*- C++ -*-
    00002
    00003 // Copyright (C) 2001 Free Software Foundation, Inc.
    00004 //
    00005 // This file is part of the GNU ISO C++ Library.  This library is free
    00006 // software; you can redistribute it and/or modify it under the
    00007 // terms of the GNU General Public License as published by the
    00008 // Free Software Foundation; either version 2, or (at your option)
    00009 // any later version.
    00010
    00011 // This library is distributed in the hope that it will be useful,
    00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00014 // GNU General Public License for more details.
    00015
    00016 // You should have received a copy of the GNU General Public License along
    00017 // with this library; see the file COPYING.  If not, write to the Free
    00018 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
    00019 // USA.
    00020
    00021 // As a special exception, you may use this file as part of a free software
    00022 // library without restriction.  Specifically, if other files instantiate
    00023 // templates or use macros or inline functions from this file, or you compile
    00024 // this file and link it with other files to produce an executable, this
    00025 // file does not by itself cause the resulting executable to be covered by
    00026 // the GNU General Public License.  This exception does not however
    00027 // invalidate any other reasons why the executable file might be covered by
    00028 // the GNU General Public License.
    00029
    00030 /*
    00031  *
    00032  * Copyright (c) 1994
    00033  * Hewlett-Packard Company
    00034  *
    00035  * Permission to use, copy, modify, distribute and sell this software
    00036  * and its documentation for any purpose is hereby granted without fee,
    00037  * provided that the above copyright notice appear in all copies and
    00038  * that both that copyright notice and this permission notice appear
    00039  * in supporting documentation.  Hewlett-Packard Company makes no
    00040  * representations about the suitability of this software for any
    00041  * purpose.  It is provided "as is" without express or implied warranty.
    00042  *
    00043  *
    00044  * Copyright (c) 1996,1997
    00045  * Silicon Graphics Computer Systems, Inc.
    00046  *
    00047  * Permission to use, copy, modify, distribute and sell this software
    00048  * and its documentation for any purpose is hereby granted without fee,
    00049  * provided that the above copyright notice appear in all copies and
    00050  * that both that copyright notice and this permission notice appear
    00051  * in supporting documentation.  Silicon Graphics makes no
    00052  * representations about the suitability of this software for any
    00053  * purpose.  It is provided "as is" without express or implied warranty.
    00054  */
    00055
    00061 #ifndef _CPP_BITS_STL_NUMERIC_H
    00062 #define _CPP_BITS_STL_NUMERIC_H 1
    00063
    00064 namespace std
    00065 {
    00066
    00067   template<typename _InputIterator, typename _Tp>
    00068     _Tp
    00069     accumulate(_InputIterator __first, _InputIterator __last, _Tp __init)
    00070     {
    00071       // concept requirements
    00072       __glibcpp_function_requires(_InputIteratorConcept<_InputIterator>)
    00073
    00074       for ( ; __first != __last; ++__first)
    00075     __init = __init + *__first;
    00076       return __init;
    00077     }
    00078
    00079   template<typename _InputIterator, typename _Tp, typename _BinaryOperation>
    00080     _Tp
    00081     accumulate(_InputIterator __first, _InputIterator __last, _Tp __init,
    00082            _BinaryOperation __binary_op)
    00083     {
    00084       // concept requirements
    00085       __glibcpp_function_requires(_InputIteratorConcept<_InputIterator>)
    00086
    00087       for ( ; __first != __last; ++__first)
    00088     __init = __binary_op(__init, *__first);
    00089       return __init;
    00090     }
    00091
    00092   template<typename _InputIterator1, typename _InputIterator2, typename _Tp>
    00093     _Tp
    00094     inner_product(_InputIterator1 __first1, _InputIterator1 __last1,
    00095           _InputIterator2 __first2, _Tp __init)
    00096     {
    00097       // concept requirements
    00098       __glibcpp_function_requires(_InputIteratorConcept<_InputIterator1>)
    00099       __glibcpp_function_requires(_InputIteratorConcept<_InputIterator2>)
    00100
    00101       for ( ; __first1 != __last1; ++__first1, ++__first2)
    00102     __init = __init + (*__first1 * *__first2);
    00103       return __init;
    00104     }
    00105
    00106   template<typename _InputIterator1, typename _InputIterator2, typename _Tp,
    00107         typename _BinaryOperation1, typename _BinaryOperation2>
    00108     _Tp
    00109     inner_product(_InputIterator1 __first1, _InputIterator1 __last1,
    00110           _InputIterator2 __first2, _Tp __init,
    00111           _BinaryOperation1 __binary_op1,
    00112           _BinaryOperation2 __binary_op2)
    00113     {
    00114       // concept requirements
    00115       __glibcpp_function_requires(_InputIteratorConcept<_InputIterator1>)
    00116       __glibcpp_function_requires(_InputIteratorConcept<_InputIterator2>)
    00117
    00118       for ( ; __first1 != __last1; ++__first1, ++__first2)
    00119     __init = __binary_op1(__init, __binary_op2(*__first1, *__first2));
    00120       return __init;
    00121     }
    00122
    00123   template<typename _InputIterator, typename _OutputIterator>
    00124     _OutputIterator
    00125     partial_sum(_InputIterator __first, _InputIterator __last,
    00126         _OutputIterator __result)
    00127     {
    00128       typedef typename iterator_traits<_InputIterator>::value_type _ValueType;
    00129
    00130       // concept requirements
    00131       __glibcpp_function_requires(_InputIteratorConcept<_InputIterator>)
    00132       __glibcpp_function_requires(_OutputIteratorConcept<_OutputIterator, _ValueType>)
    00133
    00134       if (__first == __last) return __result;
    00135       *__result = *__first;
    00136       _ValueType __value = *__first;
    00137       while (++__first != __last) {
    00138     __value = __value + *__first;
    00139     *++__result = __value;
    00140       }
    00141       return ++__result;
    00142     }
    00143
    00144   template<typename _InputIterator, typename _OutputIterator, typename _BinaryOperation>
    00145     _OutputIterator
    00146     partial_sum(_InputIterator __first, _InputIterator __last,
    00147         _OutputIterator __result, _BinaryOperation __binary_op)
    00148     {
    00149       typedef typename iterator_traits<_InputIterator>::value_type _ValueType;
    00150
    00151       // concept requirements
    00152       __glibcpp_function_requires(_InputIteratorConcept<_InputIterator>)
    00153       __glibcpp_function_requires(_OutputIteratorConcept<_OutputIterator, _ValueType>)
    00154
    00155       if (__first == __last) return __result;
    00156       *__result = *__first;
    00157       _ValueType __value = *__first;
    00158       while (++__first != __last) {
    00159     __value = __binary_op(__value, *__first);
    00160     *++__result = __value;
    00161       }
    00162       return ++__result;
    00163     }
    00164
    00165   template<typename _InputIterator, typename _OutputIterator>
    00166     _OutputIterator
    00167     adjacent_difference(_InputIterator __first,
    00168             _InputIterator __last, _OutputIterator __result)
    00169     {
    00170       typedef typename iterator_traits<_InputIterator>::value_type _ValueType;
    00171
    00172       // concept requirements
    00173       __glibcpp_function_requires(_InputIteratorConcept<_InputIterator>)
    00174       __glibcpp_function_requires(_OutputIteratorConcept<_OutputIterator, _ValueType>)
    00175
    00176       if (__first == __last) return __result;
    00177       *__result = *__first;
    00178       _ValueType __value = *__first;
    00179       while (++__first != __last) {
    00180     _ValueType __tmp = *__first;
    00181     *++__result = __tmp - __value;
    00182     __value = __tmp;
    00183       }
    00184       return ++__result;
    00185     }
    00186
    00187   template<typename _InputIterator, typename _OutputIterator, typename _BinaryOperation>
    00188     _OutputIterator
    00189     adjacent_difference(_InputIterator __first, _InputIterator __last,
    00190             _OutputIterator __result, _BinaryOperation __binary_op)
    00191     {
    00192       typedef typename iterator_traits<_InputIterator>::value_type _ValueType;
    00193
    00194       // concept requirements
    00195       __glibcpp_function_requires(_InputIteratorConcept<_InputIterator>)
    00196       __glibcpp_function_requires(_OutputIteratorConcept<_OutputIterator, _ValueType>)
    00197
    00198       if (__first == __last) return __result;
    00199       *__result = *__first;
    00200       _ValueType __value = *__first;
    00201       while (++__first != __last) {
    00202     _ValueType __tmp = *__first;
    00203     *++__result = __binary_op(__tmp, __value);
    00204     __value = __tmp;
    00205       }
    00206       return ++__result;
    00207     }
    00208
    00209 } // namespace std
    00210
    00211 #endif /* _CPP_BITS_STL_NUMERIC_H */
    00212
    00213 // Local Variables:
    00214 // mode:C++
    00215 // End: