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