mirror of
https://github.com/triqs/dft_tools
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152 lines
8.2 KiB
C++
152 lines
8.2 KiB
C++
/*******************************************************************************
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*
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* TRIQS: a Toolbox for Research in Interacting Quantum Systems
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*
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* Copyright (C) 2011 by O. Parcollet
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*
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* TRIQS is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* TRIQS. If not, see <http://www.gnu.org/licenses/>.
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*
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******************************************************************************/
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#ifndef TRIQS_ARRAYS_MATRIX_VIEW_PROXY_H
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#define TRIQS_ARRAYS_MATRIX_VIEW_PROXY_H
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#include "./array.hpp"
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#include "./matrix.hpp"
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#include <boost/preprocessor/repetition/enum.hpp>
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#include <boost/preprocessor/repetition/enum_trailing.hpp>
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#include <boost/preprocessor/repetition/repeat.hpp>
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namespace triqs { namespace arrays {
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template<typename ArrayType,int Pos > class matrix_view_proxy;
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template<typename ArrayType,int Pos > class const_matrix_view_proxy;
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// to do : separate the array and the matrix case.
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// generalize with preprocessor (draft below)
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// write concept mutable down and clean it (dim0, dim1, len(i), ...)
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#ifdef DO_NOT_DEFINE_ME
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// human version of the class, the preprocessor generalisation is next..
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template<typename ArrayType > class const_matrix_view_proxy<ArrayType,2> : TRIQS_MODEL_CONCEPT(ImmutableMatrix) {
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ArrayType const * A; size_t n;
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public :
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typedef typename ArrayType::value_type value_type;
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const_matrix_view_proxy (ArrayType const & A_, size_t n_=0) : A(&A_), n(n_){}
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typedef indexmaps::slicer<typename ArrayType::indexmap_type , range , range,size_t,ellipsis> slicer_t;
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typedef typename slicer_t::r_type indexmap_type;
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typedef typename indexmap_type::domain_type domain_type;
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indexmap_type indexmap() const { return slicer_t::invoke(A->indexmap() , range() , range(),n, ellipsis()); }
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domain_type domain() const { return indexmap().domain();}
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size_t len(int i) const { return A->len(i);}
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size_t dim0() const { return A->len(0);}
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size_t dim1() const { return A->len(1);}
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typename ArrayType::storage_type const & storage() const { return A->storage();}
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TRIQS_DELETE_COMPOUND_OPERATORS(const_matrix_view_proxy);
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template< typename A0 , typename A1 , typename ... Args> value_type const & operator() ( A0 &&a0 , A1 &&a1 , Args && ... args) const
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{ return (*A)( std::forward<A0>(a0) , std::forward<A1>(a1) , n,std::forward<Args>(args)...);}
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};
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template<typename ArrayType > class matrix_view_proxy<ArrayType,2> : TRIQS_MODEL_CONCEPT(MutableMatrix) {
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ArrayType * A; size_t n;
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public :
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typedef typename ArrayType::value_type value_type;
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matrix_view_proxy (ArrayType & A_, size_t n_=0) : A(&A_), n(n_){}
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typedef indexmaps::slicer<typename ArrayType::indexmap_type , range , range,size_t,ellipsis> slicer_t;
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typedef typename slicer_t::r_type indexmap_type;
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typedef typename indexmap_type::domain_type domain_type;
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indexmap_type indexmap() const { return slicer_t::invoke(A->indexmap() , range() , range(),n, ellipsis()); }
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domain_type domain() const { return indexmap().domain();}
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size_t len(int i) const { return A->len(i);}
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size_t dim0() const { return A->len(0);}
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size_t dim1() const { return A->len(1);}
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typename ArrayType::storage_type const & storage() const { return A->storage();}
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template<typename RHS> matrix_view_proxy & operator=(const RHS & X) {triqs_arrays_assign_delegation(*this,X); return *this; }
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TRIQS_DEFINE_COMPOUND_OPERATORS(matrix_view_proxy);
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template< typename A0 , typename A1 , typename ... Args> value_type & operator() ( A0 &&a0 , A1 &&a1 , Args && ... args) const
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{ return (*A)( std::forward<A0>(a0) , std::forward<A1>(a1) , this->n,std::forward<Args>(args)...);}
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};
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#else
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#define AUX0(z,P,NNN) std::forward<A##P>(a##P),
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#define AUX1(z,P,NNN) A##P && a##P,
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#define TEXT(z, n, text) text
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#define IMPL(z, POS, unused)\
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template<typename ArrayType > class const_matrix_view_proxy<ArrayType,POS> : TRIQS_MODEL_CONCEPT(ImmutableMatrix) {\
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static_assert(ArrayType::rank==3, "Only array of rank 3 here");\
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ArrayType const * A; size_t n;\
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public :\
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typedef typename ArrayType::value_type value_type;\
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const_matrix_view_proxy (ArrayType const & A_, size_t n_=0) : A(&A_), n(n_), S(this->storage()), IM(this->indexmap()){}\
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typedef indexmaps::slicer<typename ArrayType::indexmap_type BOOST_PP_ENUM_TRAILING(POS, TEXT, range),size_t,ellipsis> slicer_t;\
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typedef typename slicer_t::r_type indexmap_type;\
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typedef typename indexmap_type::domain_type domain_type;\
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indexmap_type indexmap() const { return slicer_t::invoke(A->indexmap() BOOST_PP_ENUM_TRAILING(POS, TEXT, range()),n, ellipsis()); }\
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domain_type domain() const { return indexmap().domain();}\
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size_t len(int i) const { return A->len(i);}\
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size_t dim0() const { return A->len((POS+1)%3);}\
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size_t dim1() const { return A->len((POS+2)%3);}\
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typename ArrayType::storage_type const & storage() const { return A->storage();}\
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value_type const * restrict data_start() const { return &storage()[indexmap().start_shift()];}\
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value_type * restrict data_start() { return &storage()[indexmap().start_shift()];}\
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matrix_view<value_type> operator()() const {return *this;}\
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TRIQS_DELETE_COMPOUND_OPERATORS(const_matrix_view_proxy);\
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template<BOOST_PP_ENUM_PARAMS(POS,typename A) BOOST_PP_COMMA_IF(POS) typename ... Args>\
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value_type const & operator() (BOOST_PP_REPEAT(POS,AUX1,nil) Args && ... args) const \
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{ return (*A)(BOOST_PP_REPEAT(POS,AUX0,nil) n,std::forward<Args>(args)...);}\
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friend std::ostream & operator <<(std::ostream & out, const_matrix_view_proxy const & x) { return out << matrix_view<value_type>(x);}\
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typename ArrayType::storage_type S;\
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indexmap_type IM;\
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};\
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\
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template<typename ArrayType > class matrix_view_proxy<ArrayType,POS> : TRIQS_MODEL_CONCEPT(MutableMatrix) {\
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static_assert(ArrayType::rank==3, "Only array of rank 3 here");\
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ArrayType * A; size_t n;\
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public :\
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typedef typename ArrayType::value_type value_type;\
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matrix_view_proxy (ArrayType & A_, size_t n_=0) : A(&A_), n(n_), IM(this->indexmap()){}\
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typedef indexmaps::slicer<typename ArrayType::indexmap_type BOOST_PP_ENUM_TRAILING(POS, TEXT, range),size_t,ellipsis> slicer_t;\
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typedef typename slicer_t::r_type indexmap_type;\
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typedef typename indexmap_type::domain_type domain_type;\
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indexmap_type indexmap() const { return slicer_t::invoke(A->indexmap() BOOST_PP_ENUM_TRAILING(POS, TEXT, range()),n, ellipsis()); }\
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domain_type domain() const { return indexmap().domain();}\
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size_t len(int i) const { return A->len(i);}\
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size_t dim0() const { return A->len((POS+1)%3);}\
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size_t dim1() const { return A->len((POS+2)%3);}\
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typename ArrayType::storage_type const & storage() const { return A->storage();}\
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value_type const * restrict data_start() const { return &storage()[indexmap().start_shift()];}\
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value_type * restrict data_start() { return &storage()[indexmap().start_shift()];}\
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matrix_view<value_type> operator()() const {return *this;}\
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template<typename RHS> matrix_view_proxy & operator=(const RHS & X) {triqs_arrays_assign_delegation(*this,X); return *this; }\
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TRIQS_DEFINE_COMPOUND_OPERATORS(matrix_view_proxy);\
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template<BOOST_PP_ENUM_PARAMS(POS,typename A) BOOST_PP_COMMA_IF(POS) typename ... Args>\
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value_type & operator() (BOOST_PP_REPEAT(POS,AUX1,nil) Args && ... args) const\
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{ return (*A)(BOOST_PP_REPEAT(POS,AUX0,nil) n,std::forward<Args>(args)...);}\
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friend std::ostream & operator <<(std::ostream & out, matrix_view_proxy const & x) { return out << matrix_view<value_type>(x);}\
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typename ArrayType::storage_type S;\
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indexmap_type IM;\
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};
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BOOST_PP_REPEAT(ARRAY_NRANK_MAX , IMPL, nil);
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#undef IMPL
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#undef AUX0
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#undef AUX1
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#undef TEXT
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#endif
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template<int Pos, typename ArrayType>
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matrix_view_proxy<ArrayType,Pos> make_matrix_view_proxy(ArrayType const & A) { return matrix_view_proxy<ArrayType,Pos> (A);}
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}}
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#endif
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