mirror of
https://github.com/triqs/dft_tools
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195 lines
8.7 KiB
C++
195 lines
8.7 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) 2011-2013 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_INDEXMAP_CUBOID_DOMAIN_H
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#define TRIQS_ARRAYS_INDEXMAP_CUBOID_DOMAIN_H
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#include "../common.hpp"
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#include "../range.hpp"
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#include "./mem_layout.hpp"
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#include <triqs/utility/mini_vector.hpp>
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#include "../../impl/exceptions.hpp"
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#include <iostream>
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#include <sstream>
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#include <boost/preprocessor/repetition/enum_params.hpp>
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#include <boost/preprocessor/repetition/repeat_from_to.hpp>
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#include <boost/preprocessor/repetition/repeat.hpp>
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#include <boost/preprocessor/punctuation/comma_if.hpp>
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namespace triqs { namespace arrays { namespace indexmaps { namespace cuboid {
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using namespace triqs::arrays::permutations;
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/// Standard hyper_rectangular domain for arrays
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template<int Rank>
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class domain_t {
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typedef mini_vector<size_t,Rank> n_uple;
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n_uple lengths_;
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friend class boost::serialization::access;
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template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & boost::serialization::make_nvp("dimensions",lengths_);}
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public :
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static constexpr unsigned int rank = Rank;
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typedef n_uple index_value_type;
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domain_t () =default;
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domain_t (const domain_t & C) = default;
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domain_t (domain_t && C) { *this = std::move(C);}
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friend void swap( domain_t & a, domain_t & b) { swap(a.lengths_,b.lengths_);}
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domain_t & operator =( domain_t const &) = default;
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domain_t & operator =( domain_t && x) { swap(*this,x); return *this;}
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domain_t (n_uple lengths):lengths_(std::move(lengths)) {}
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domain_t (mini_vector<int,Rank> const & lengths):lengths_(lengths) {}
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domain_t (std::vector<std::size_t> const & l):lengths_() {
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if (!(l.size()==rank)) TRIQS_RUNTIME_ERROR << "cuboid domain_t construction : vector size incorrect : got "<<l.size() <<" while expected "<< rank;
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lengths_ = n_uple(l);
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}
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template <typename ... T> domain_t(size_t i0, T... t): lengths_(i0, t...){}
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size_t number_of_elements() const { return lengths_.product_of_elements();}
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bool operator==(domain_t const & X) const { return this->lengths_ == X.lengths_;}
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bool operator!=(domain_t const & X) const { return !(*this==X);}
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n_uple const & lengths() const { return lengths_;}
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/** Generates the value of the indices of a cuboid_domain. */
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static constexpr ull_t iteration_order_default = permutations::identity(Rank);
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template <ull_t IterationOrder= iteration_order_default >
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class gal_generator {
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typedef index_value_type indices_type;
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const domain_t * dom;
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indices_type indices_tuple;
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bool atend;
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public:
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gal_generator (const domain_t & P, bool atEnd=false): dom(&P), atend(atEnd) {}
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bool operator==(const gal_generator & IT2) const { assert((IT2.dom == dom)); return ((IT2.atend==atend) );}
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bool operator!=(const gal_generator & IT2) const { return (!operator==(IT2));}
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indices_type const & operator *() const { return indices_tuple;}
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explicit operator bool () const { return !atend;}
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gal_generator & operator++(){ assert(!atend); atend = advance_impl(std::integral_constant<int,0>()); return *this;}
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private:
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template<int r> bool advance_impl(std::integral_constant<int,r>) {
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constexpr int p = permutations::apply(IterationOrder, r);
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if (indices_tuple[p] < dom->lengths()[p]-1) { ++(indices_tuple[p]); return false;}
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indices_tuple[p] = 0;
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return advance_impl(std::integral_constant<int,r+1>());
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}
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bool advance_impl(std::integral_constant<int,rank>) { return true;}
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};
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typedef gal_generator<> generator;
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generator begin() const { return generator(*this,false);}
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generator end() const { return generator(*this,true);}
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/* End of generator */
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// Check that key in in the domain
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template<class KeyType> void assert_key_in_domain(KeyType const & key) const {
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std::stringstream fs;
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bool res = key_check_impl(std::integral_constant<int,0>(), key,this->lengths_,fs);
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if (!res) TRIQS_ARRAYS_KEY_ERROR << " key out of domain \n" <<fs.str() ;
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}
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template<int r,class KeyType>
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bool key_check_impl (std::integral_constant<int,r>, KeyType const & key, n_uple const & L, std::stringstream & fs ) const {
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//bool cond = ( ( size_t(key[r]) < L[r]));
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bool cond = ( ( size_t(std::get<r>(key)) < L[r]));
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//if (!cond) fs << "key ["<<r<<"] = "<< key[r] <<" is not within [0,"<<L[r]<<"[\n";
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if (!cond) fs << "key ["<<r<<"] = "<< std::get<r>(key) <<" is not within [0,"<<L[r]<<"[\n";
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return key_check_impl(std::integral_constant<int,r+1>(), key,L,fs) && cond;
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}
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template<class KeyType> bool key_check_impl (std::integral_constant<int,rank>, KeyType const &, n_uple const &, std::stringstream &) const { return true;}
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// Check that key in in the domain : variadic form. No need for speed optimisation here, it is just for debug
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template<typename ... Args> void assert_key_in_domain_v (Args const & ... args) const { assert_key_in_domain( std::make_tuple(args...));}
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friend std::ostream & operator<<(std::ostream & out, domain_t const & x){return out<<"Cuboid of rank "<<x.rank<<" and dimensions "<<x.lengths();}
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};
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// ------------------------- foreach -----------------------------------------------------
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//typedef size_t foreach_int_type;
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typedef std::ptrdiff_t foreach_int_type;
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// better to be signed here : 1) on some machine/compiler, it is a lot faster !
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// When used with clef auto assign, e.g. A(i_,j_) = i -2*j, one needs signed arithmetics
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#define AUX0(z,P,NNN) constexpr int p##P = mem_layout::memory_rank_to_index(TraversalOrder,NNN-P);
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#define AUX1(z,P,unused) for (t[p##P]=0; t[p##P]< l[p##P]; ++t[p##P])
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//#define AUX1(z,P,unused) for (foreach_int_type x##P=0; x##P< dom.lengths()[p##P]; ++x##P)
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#define AUX3(z,p,unused) BOOST_PP_COMMA_IF(p) t[p]
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#define IMPL(z, RR, unused) \
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template<ull_t TraversalOrder, typename FntType> void foreach(domain_t<RR> const & dom, FntType F) {\
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BOOST_PP_REPEAT(RR,AUX0,BOOST_PP_DEC(RR))\
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mini_vector<foreach_int_type,RR> t;\
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const mini_vector<foreach_int_type,RR> l(dom.lengths());\
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BOOST_PP_REPEAT(RR,AUX1,nil){ F(BOOST_PP_REPEAT(RR,AUX3,nil)); }}
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BOOST_PP_REPEAT_FROM_TO(1,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 AUX3
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}
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/// ------------ Pretty Printing : specializing the default behaviour for d=1,2 -------------------------
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namespace PrettyPrint_details {
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template<int R, typename A>
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struct print_impl {
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std::ostream & out; A const & a;
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print_impl( std::ostream & out_, A const & a_) : out(out_), a(a_){}
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template<typename A0, typename ... Args> void operator()(A0 const & a0, Args const & ... args) const { out << a(a0,args...)<< " ";}
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void print() const { out<<"[";
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indexmaps::cuboid::foreach<permutations::identity(A::domain_type::rank)> (a.domain(), std::cref(*this)); //foreach(a, std::cref(*this));
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out<<"]"; }
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};
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template<typename A>
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struct print_impl <1,A> {
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std::ostream & out; A const & a;
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print_impl( std::ostream & out_, A const & a_) : out(out_), a(a_){}
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void print() const {
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auto d = a.indexmap().domain();
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out<<"["; for (size_t i=0; i< d.lengths()[0]; ++i) out<<(i>0 ? ",": "")<<a(i); out<<"]";}
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};
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template<typename A>
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struct print_impl <2,A> {
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std::ostream & out; A const & a;
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print_impl( std::ostream & out_, A const & a_) : out(out_), a(a_){}
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void print() const {
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auto d = a.indexmap().domain();
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out<<"\n[";
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for (size_t i=0; i< d.lengths()[0]; ++i) {
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out<<(i==0 ? "[" : " [");
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for (size_t j=0; j< d.lengths()[1]; ++j) out<<(j>0 ? ",": "")<<a(i,j);
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out<<"]"<<(i==d.lengths()[0]-1 ? "" : "\n");
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}
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out<<"]";
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}
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};
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}
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template<typename A>
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void pretty_print (std::ostream & out, A const & a ) { PrettyPrint_details::print_impl<A::domain_type::rank,A>(out,a).print();}
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}
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template<typename ... U>
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indexmaps::cuboid::domain_t<sizeof...(U)> make_cuboid_domain(U ... u) { return {u...};}
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//cuboid_array_domain<sizeof...(U)> make_cuboid_domain(U ... u) { return {u...};}
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}}
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#endif
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