571 lines
24 KiB
Plaintext
571 lines
24 KiB
Plaintext
//
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// Copyright (c) 2000-2002
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// Joerg Walter, Mathias Koch
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// The authors gratefully acknowledge the support of
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// GeNeSys mbH & Co. KG in producing this work.
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//
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#ifndef _BOOST_UBLAS_VECTOR_ASSIGN_
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#define _BOOST_UBLAS_VECTOR_ASSIGN_
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#include <boost/numeric/ublas/functional.hpp> // scalar_assign
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// Required for make_conformant storage
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#include <vector>
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// Iterators based on ideas of Jeremy Siek
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namespace boost { namespace numeric { namespace ublas {
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namespace detail {
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// Weak equality check - useful to compare equality two arbitary vector expression results.
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// Since the actual expressions are unknown, we check for and arbitary error bound
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// on the relative error.
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// For a linear expression the infinity norm makes sense as we do not know how the elements will be
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// combined in the expression. False positive results are inevitable for arbirary expressions!
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template<class E1, class E2, class S>
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BOOST_UBLAS_INLINE
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bool equals (const vector_expression<E1> &e1, const vector_expression<E2> &e2, S epsilon, S min_norm) {
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return norm_inf (e1 - e2) <= epsilon *
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std::max<S> (std::max<S> (norm_inf (e1), norm_inf (e2)), min_norm);
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}
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template<class E1, class E2>
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BOOST_UBLAS_INLINE
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bool expression_type_check (const vector_expression<E1> &e1, const vector_expression<E2> &e2) {
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typedef typename type_traits<typename promote_traits<typename E1::value_type,
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typename E2::value_type>::promote_type>::real_type real_type;
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return equals (e1, e2, BOOST_UBLAS_TYPE_CHECK_EPSILON, BOOST_UBLAS_TYPE_CHECK_MIN);
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}
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// Make sparse proxies conformant
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template<class V, class E>
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// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
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void make_conformant (V &v, const vector_expression<E> &e) {
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BOOST_UBLAS_CHECK (v.size () == e ().size (), bad_size ());
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typedef typename V::size_type size_type;
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typedef typename V::difference_type difference_type;
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typedef typename V::value_type value_type;
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// FIXME unbounded_array with push_back maybe better
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std::vector<size_type> index;
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typename V::iterator it (v.begin ());
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typename V::iterator it_end (v.end ());
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typename E::const_iterator ite (e ().begin ());
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typename E::const_iterator ite_end (e ().end ());
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if (it != it_end && ite != ite_end) {
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size_type it_index = it.index (), ite_index = ite.index ();
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while (true) {
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difference_type compare = it_index - ite_index;
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if (compare == 0) {
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++ it, ++ ite;
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if (it != it_end && ite != ite_end) {
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it_index = it.index ();
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ite_index = ite.index ();
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} else
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break;
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} else if (compare < 0) {
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increment (it, it_end, - compare);
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if (it != it_end)
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it_index = it.index ();
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else
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break;
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} else if (compare > 0) {
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if (*ite != value_type/*zero*/())
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index.push_back (ite.index ());
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++ ite;
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if (ite != ite_end)
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ite_index = ite.index ();
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else
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break;
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}
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}
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}
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while (ite != ite_end) {
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if (*ite != value_type/*zero*/())
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index.push_back (ite.index ());
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++ ite;
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}
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for (size_type k = 0; k < index.size (); ++ k)
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v (index [k]) = value_type/*zero*/();
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}
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}//namespace detail
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// Explicitly iterating
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template<template <class T1, class T2> class F, class V, class T>
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// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
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void iterating_vector_assign_scalar (V &v, const T &t) {
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typedef F<typename V::iterator::reference, T> functor_type;
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typedef typename V::difference_type difference_type;
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difference_type size (v.size ());
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typename V::iterator it (v.begin ());
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BOOST_UBLAS_CHECK (v.end () - it == size, bad_size ());
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#ifndef BOOST_UBLAS_USE_DUFF_DEVICE
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while (-- size >= 0)
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functor_type::apply (*it, t), ++ it;
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#else
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DD (size, 4, r, (functor_type::apply (*it, t), ++ it));
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#endif
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}
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// Explicitly case
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template<template <class T1, class T2> class F, class V, class T>
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// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
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void indexing_vector_assign_scalar (V &v, const T &t) {
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typedef F<typename V::reference, T> functor_type;
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typedef typename V::size_type size_type;
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size_type size (v.size ());
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#ifndef BOOST_UBLAS_USE_DUFF_DEVICE
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for (size_type i = 0; i < size; ++ i)
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functor_type::apply (v (i), t);
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#else
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size_type i (0);
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DD (size, 4, r, (functor_type::apply (v (i), t), ++ i));
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#endif
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}
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// Dense (proxy) case
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template<template <class T1, class T2> class F, class V, class T>
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// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
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void vector_assign_scalar (V &v, const T &t, dense_proxy_tag) {
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#ifdef BOOST_UBLAS_USE_INDEXING
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indexing_vector_assign_scalar<F> (v, t);
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#elif BOOST_UBLAS_USE_ITERATING
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iterating_vector_assign_scalar<F> (v, t);
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#else
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typedef typename V::size_type size_type;
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size_type size (v.size ());
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if (size >= BOOST_UBLAS_ITERATOR_THRESHOLD)
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iterating_vector_assign_scalar<F> (v, t);
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else
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indexing_vector_assign_scalar<F> (v, t);
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#endif
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}
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// Packed (proxy) case
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template<template <class T1, class T2> class F, class V, class T>
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// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
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void vector_assign_scalar (V &v, const T &t, packed_proxy_tag) {
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typedef F<typename V::iterator::reference, T> functor_type;
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typedef typename V::difference_type difference_type;
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typename V::iterator it (v.begin ());
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difference_type size (v.end () - it);
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while (-- size >= 0)
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functor_type::apply (*it, t), ++ it;
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}
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// Sparse (proxy) case
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template<template <class T1, class T2> class F, class V, class T>
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// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
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void vector_assign_scalar (V &v, const T &t, sparse_proxy_tag) {
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typedef F<typename V::iterator::reference, T> functor_type;
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typename V::iterator it (v.begin ());
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typename V::iterator it_end (v.end ());
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while (it != it_end)
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functor_type::apply (*it, t), ++ it;
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}
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// Dispatcher
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template<template <class T1, class T2> class F, class V, class T>
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BOOST_UBLAS_INLINE
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void vector_assign_scalar (V &v, const T &t) {
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typedef typename V::storage_category storage_category;
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vector_assign_scalar<F> (v, t, storage_category ());
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}
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template<class SC, bool COMPUTED, class RI>
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struct vector_assign_traits {
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typedef SC storage_category;
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};
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template<bool COMPUTED>
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struct vector_assign_traits<dense_tag, COMPUTED, packed_random_access_iterator_tag> {
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typedef packed_tag storage_category;
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};
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template<>
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struct vector_assign_traits<dense_tag, false, sparse_bidirectional_iterator_tag> {
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typedef sparse_tag storage_category;
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};
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template<>
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struct vector_assign_traits<dense_tag, true, sparse_bidirectional_iterator_tag> {
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typedef sparse_proxy_tag storage_category;
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};
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template<bool COMPUTED>
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struct vector_assign_traits<dense_proxy_tag, COMPUTED, packed_random_access_iterator_tag> {
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typedef packed_proxy_tag storage_category;
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};
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template<>
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struct vector_assign_traits<dense_proxy_tag, false, sparse_bidirectional_iterator_tag> {
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typedef sparse_proxy_tag storage_category;
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};
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template<>
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struct vector_assign_traits<dense_proxy_tag, true, sparse_bidirectional_iterator_tag> {
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typedef sparse_proxy_tag storage_category;
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};
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template<>
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struct vector_assign_traits<packed_tag, false, sparse_bidirectional_iterator_tag> {
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typedef sparse_tag storage_category;
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};
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template<>
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struct vector_assign_traits<packed_tag, true, sparse_bidirectional_iterator_tag> {
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typedef sparse_proxy_tag storage_category;
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};
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template<bool COMPUTED>
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struct vector_assign_traits<packed_proxy_tag, COMPUTED, sparse_bidirectional_iterator_tag> {
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typedef sparse_proxy_tag storage_category;
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};
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template<>
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struct vector_assign_traits<sparse_tag, true, dense_random_access_iterator_tag> {
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typedef sparse_proxy_tag storage_category;
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};
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template<>
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struct vector_assign_traits<sparse_tag, true, packed_random_access_iterator_tag> {
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typedef sparse_proxy_tag storage_category;
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};
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template<>
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struct vector_assign_traits<sparse_tag, true, sparse_bidirectional_iterator_tag> {
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typedef sparse_proxy_tag storage_category;
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};
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// Explicitly iterating
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template<template <class T1, class T2> class F, class V, class E>
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// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
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void iterating_vector_assign (V &v, const vector_expression<E> &e) {
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typedef F<typename V::iterator::reference, typename E::value_type> functor_type;
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typedef typename V::difference_type difference_type;
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difference_type size (BOOST_UBLAS_SAME (v.size (), e ().size ()));
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typename V::iterator it (v.begin ());
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BOOST_UBLAS_CHECK (v.end () - it == size, bad_size ());
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typename E::const_iterator ite (e ().begin ());
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BOOST_UBLAS_CHECK (e ().end () - ite == size, bad_size ());
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#ifndef BOOST_UBLAS_USE_DUFF_DEVICE
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while (-- size >= 0)
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functor_type::apply (*it, *ite), ++ it, ++ ite;
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#else
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DD (size, 2, r, (functor_type::apply (*it, *ite), ++ it, ++ ite));
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#endif
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}
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// Explicitly indexing
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template<template <class T1, class T2> class F, class V, class E>
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// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
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void indexing_vector_assign (V &v, const vector_expression<E> &e) {
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typedef F<typename V::reference, typename E::value_type> functor_type;
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typedef typename V::size_type size_type;
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size_type size (BOOST_UBLAS_SAME (v.size (), e ().size ()));
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#ifndef BOOST_UBLAS_USE_DUFF_DEVICE
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for (size_type i = 0; i < size; ++ i)
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functor_type::apply (v (i), e () (i));
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#else
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size_type i (0);
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DD (size, 2, r, (functor_type::apply (v (i), e () (i)), ++ i));
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#endif
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}
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// Dense (proxy) case
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template<template <class T1, class T2> class F, class V, class E>
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// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
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void vector_assign (V &v, const vector_expression<E> &e, dense_proxy_tag) {
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#ifdef BOOST_UBLAS_USE_INDEXING
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indexing_vector_assign<F> (v, e);
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#elif BOOST_UBLAS_USE_ITERATING
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iterating_vector_assign<F> (v, e);
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#else
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typedef typename V::size_type size_type;
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size_type size (BOOST_UBLAS_SAME (v.size (), e ().size ()));
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if (size >= BOOST_UBLAS_ITERATOR_THRESHOLD)
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iterating_vector_assign<F> (v, e);
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else
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indexing_vector_assign<F> (v, e);
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#endif
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}
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// Packed (proxy) case
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template<template <class T1, class T2> class F, class V, class E>
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// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
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void vector_assign (V &v, const vector_expression<E> &e, packed_proxy_tag) {
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BOOST_UBLAS_CHECK (v.size () == e ().size (), bad_size ());
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typedef F<typename V::iterator::reference, typename E::value_type> functor_type;
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typedef typename V::difference_type difference_type;
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typedef typename V::value_type value_type;
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#if BOOST_UBLAS_TYPE_CHECK
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vector<value_type> cv (v.size ());
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indexing_vector_assign<scalar_assign> (cv, v);
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indexing_vector_assign<F> (cv, e);
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#endif
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typename V::iterator it (v.begin ());
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typename V::iterator it_end (v.end ());
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typename E::const_iterator ite (e ().begin ());
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typename E::const_iterator ite_end (e ().end ());
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difference_type it_size (it_end - it);
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difference_type ite_size (ite_end - ite);
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if (it_size > 0 && ite_size > 0) {
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difference_type size ((std::min) (difference_type (it.index () - ite.index ()), ite_size));
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if (size > 0) {
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ite += size;
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ite_size -= size;
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}
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}
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if (it_size > 0 && ite_size > 0) {
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difference_type size ((std::min) (difference_type (ite.index () - it.index ()), it_size));
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if (size > 0) {
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it_size -= size;
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if (!functor_type::computed) {
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while (-- size >= 0) // zeroing
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functor_type::apply (*it, value_type/*zero*/()), ++ it;
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} else {
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it += size;
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}
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}
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}
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difference_type size ((std::min) (it_size, ite_size));
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it_size -= size;
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ite_size -= size;
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while (-- size >= 0)
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functor_type::apply (*it, *ite), ++ it, ++ ite;
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size = it_size;
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if (!functor_type::computed) {
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while (-- size >= 0) // zeroing
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functor_type::apply (*it, value_type/*zero*/()), ++ it;
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} else {
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it += size;
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}
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#if BOOST_UBLAS_TYPE_CHECK
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if (! disable_type_check<bool>::value)
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BOOST_UBLAS_CHECK (detail::expression_type_check (v, cv),
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external_logic ("external logic or bad condition of inputs"));
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#endif
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}
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// Sparse case
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template<template <class T1, class T2> class F, class V, class E>
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// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
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void vector_assign (V &v, const vector_expression<E> &e, sparse_tag) {
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BOOST_UBLAS_CHECK (v.size () == e ().size (), bad_size ());
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typedef F<typename V::iterator::reference, typename E::value_type> functor_type;
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BOOST_STATIC_ASSERT ((!functor_type::computed));
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typedef typename V::value_type value_type;
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#if BOOST_UBLAS_TYPE_CHECK
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vector<value_type> cv (v.size ());
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indexing_vector_assign<scalar_assign> (cv, v);
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indexing_vector_assign<F> (cv, e);
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#endif
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v.clear ();
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typename E::const_iterator ite (e ().begin ());
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typename E::const_iterator ite_end (e ().end ());
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while (ite != ite_end) {
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value_type t (*ite);
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if (t != value_type/*zero*/())
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v.insert_element (ite.index (), t);
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++ ite;
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}
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#if BOOST_UBLAS_TYPE_CHECK
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if (! disable_type_check<bool>::value)
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BOOST_UBLAS_CHECK (detail::expression_type_check (v, cv),
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external_logic ("external logic or bad condition of inputs"));
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#endif
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}
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// Sparse proxy or functional case
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template<template <class T1, class T2> class F, class V, class E>
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// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
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void vector_assign (V &v, const vector_expression<E> &e, sparse_proxy_tag) {
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BOOST_UBLAS_CHECK (v.size () == e ().size (), bad_size ());
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typedef F<typename V::iterator::reference, typename E::value_type> functor_type;
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typedef typename V::size_type size_type;
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typedef typename V::difference_type difference_type;
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typedef typename V::value_type value_type;
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#if BOOST_UBLAS_TYPE_CHECK
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vector<value_type> cv (v.size ());
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indexing_vector_assign<scalar_assign> (cv, v);
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indexing_vector_assign<F> (cv, e);
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#endif
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detail::make_conformant (v, e);
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typename V::iterator it (v.begin ());
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typename V::iterator it_end (v.end ());
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typename E::const_iterator ite (e ().begin ());
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typename E::const_iterator ite_end (e ().end ());
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if (it != it_end && ite != ite_end) {
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size_type it_index = it.index (), ite_index = ite.index ();
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while (true) {
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difference_type compare = it_index - ite_index;
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if (compare == 0) {
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functor_type::apply (*it, *ite);
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++ it, ++ ite;
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if (it != it_end && ite != ite_end) {
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it_index = it.index ();
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ite_index = ite.index ();
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} else
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break;
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} else if (compare < 0) {
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if (!functor_type::computed) {
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functor_type::apply (*it, value_type/*zero*/());
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++ it;
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} else
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increment (it, it_end, - compare);
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if (it != it_end)
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it_index = it.index ();
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else
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break;
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} else if (compare > 0) {
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increment (ite, ite_end, compare);
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if (ite != ite_end)
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ite_index = ite.index ();
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else
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break;
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}
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}
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}
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if (!functor_type::computed) {
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while (it != it_end) { // zeroing
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functor_type::apply (*it, value_type/*zero*/());
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++ it;
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}
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} else {
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it = it_end;
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}
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#if BOOST_UBLAS_TYPE_CHECK
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if (! disable_type_check<bool>::value)
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BOOST_UBLAS_CHECK (detail::expression_type_check (v, cv),
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external_logic ("external logic or bad condition of inputs"));
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#endif
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}
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// Dispatcher
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template<template <class T1, class T2> class F, class V, class E>
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BOOST_UBLAS_INLINE
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void vector_assign (V &v, const vector_expression<E> &e) {
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typedef typename vector_assign_traits<typename V::storage_category,
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F<typename V::reference, typename E::value_type>::computed,
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typename E::const_iterator::iterator_category>::storage_category storage_category;
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vector_assign<F> (v, e, storage_category ());
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}
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template<class SC, class RI>
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struct vector_swap_traits {
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typedef SC storage_category;
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};
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template<>
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struct vector_swap_traits<dense_proxy_tag, sparse_bidirectional_iterator_tag> {
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typedef sparse_proxy_tag storage_category;
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};
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template<>
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struct vector_swap_traits<packed_proxy_tag, sparse_bidirectional_iterator_tag> {
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typedef sparse_proxy_tag storage_category;
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};
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// Dense (proxy) case
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template<template <class T1, class T2> class F, class V, class E>
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// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
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void vector_swap (V &v, vector_expression<E> &e, dense_proxy_tag) {
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typedef F<typename V::iterator::reference, typename E::iterator::reference> functor_type;
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typedef typename V::difference_type difference_type;
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difference_type size (BOOST_UBLAS_SAME (v.size (), e ().size ()));
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typename V::iterator it (v.begin ());
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typename E::iterator ite (e ().begin ());
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while (-- size >= 0)
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functor_type::apply (*it, *ite), ++ it, ++ ite;
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}
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// Packed (proxy) case
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template<template <class T1, class T2> class F, class V, class E>
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// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
|
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void vector_swap (V &v, vector_expression<E> &e, packed_proxy_tag) {
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typedef F<typename V::iterator::reference, typename E::iterator::reference> functor_type;
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typedef typename V::difference_type difference_type;
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typename V::iterator it (v.begin ());
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typename V::iterator it_end (v.end ());
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typename E::iterator ite (e ().begin ());
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typename E::iterator ite_end (e ().end ());
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difference_type it_size (it_end - it);
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difference_type ite_size (ite_end - ite);
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if (it_size > 0 && ite_size > 0) {
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difference_type size ((std::min) (difference_type (it.index () - ite.index ()), ite_size));
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if (size > 0) {
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|
ite += size;
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ite_size -= size;
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}
|
|
}
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|
if (it_size > 0 && ite_size > 0) {
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|
difference_type size ((std::min) (difference_type (ite.index () - it.index ()), it_size));
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if (size > 0)
|
|
it_size -= size;
|
|
}
|
|
difference_type size ((std::min) (it_size, ite_size));
|
|
it_size -= size;
|
|
ite_size -= size;
|
|
while (-- size >= 0)
|
|
functor_type::apply (*it, *ite), ++ it, ++ ite;
|
|
}
|
|
// Sparse proxy case
|
|
template<template <class T1, class T2> class F, class V, class E>
|
|
// BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it.
|
|
void vector_swap (V &v, vector_expression<E> &e, sparse_proxy_tag) {
|
|
BOOST_UBLAS_CHECK (v.size () == e ().size (), bad_size ());
|
|
typedef F<typename V::iterator::reference, typename E::iterator::reference> functor_type;
|
|
typedef typename V::size_type size_type;
|
|
typedef typename V::difference_type difference_type;
|
|
|
|
detail::make_conformant (v, e);
|
|
// FIXME should be a seperate restriction for E
|
|
detail::make_conformant (e (), v);
|
|
|
|
typename V::iterator it (v.begin ());
|
|
typename V::iterator it_end (v.end ());
|
|
typename E::iterator ite (e ().begin ());
|
|
typename E::iterator ite_end (e ().end ());
|
|
if (it != it_end && ite != ite_end) {
|
|
size_type it_index = it.index (), ite_index = ite.index ();
|
|
while (true) {
|
|
difference_type compare = it_index - ite_index;
|
|
if (compare == 0) {
|
|
functor_type::apply (*it, *ite);
|
|
++ it, ++ ite;
|
|
if (it != it_end && ite != ite_end) {
|
|
it_index = it.index ();
|
|
ite_index = ite.index ();
|
|
} else
|
|
break;
|
|
} else if (compare < 0) {
|
|
increment (it, it_end, - compare);
|
|
if (it != it_end)
|
|
it_index = it.index ();
|
|
else
|
|
break;
|
|
} else if (compare > 0) {
|
|
increment (ite, ite_end, compare);
|
|
if (ite != ite_end)
|
|
ite_index = ite.index ();
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
#if BOOST_UBLAS_TYPE_CHECK
|
|
increment (ite, ite_end);
|
|
increment (it, it_end);
|
|
#endif
|
|
}
|
|
|
|
// Dispatcher
|
|
template<template <class T1, class T2> class F, class V, class E>
|
|
BOOST_UBLAS_INLINE
|
|
void vector_swap (V &v, vector_expression<E> &e) {
|
|
typedef typename vector_swap_traits<typename V::storage_category,
|
|
typename E::const_iterator::iterator_category>::storage_category storage_category;
|
|
vector_swap<F> (v, e, storage_category ());
|
|
}
|
|
|
|
}}}
|
|
|
|
#endif
|