/usr/include/polymake/internal/CombArray.h is in libpolymake-dev-common 3.2r2-3.
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Ewgenij Gawrilow, Michael Joswig (Technische Universitaet Berlin, Germany)
http://www.polymake.org
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version: http://www.gnu.org/licenses/gpl.txt.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
--------------------------------------------------------------------------------
*/
#ifndef POLYMAKE_INTERNAL_COMB_ARRAY_H
#define POLYMAKE_INTERNAL_COMB_ARRAY_H
#include "polymake/list"
#include "polymake/SelectedSubset.h"
#include "polymake/Array.h"
namespace pm {
template <typename Row, int is_reverse> class comb_iterator;
template <typename Row, int is_reverse> class CombArray;
template <typename Row, int is_reverse,
bool is_sparse=check_container_ref_feature<Row, sparse>::value ||
std::is_same<typename object_traits<typename deref<Row>::type>::generic_tag, is_set>::value>
class CombArray_helper;
template <typename Row>
class CombArray_helper<Row, 2, false> { // !reversed, !sparse
protected:
typedef Array<typename container_traits<Row>::iterator> it_container;
template <typename Iterator>
void init_begin(it_container& itc, Iterator& src)
{
for (typename Entire<it_container>::iterator it=entire(itc); !it.at_end(); ++it, ++src)
*it=src->begin();
}
template <typename Iterator>
void init_end(it_container& itc, Iterator& src)
{
for (typename Entire<it_container>::iterator it=entire(itc); !it.at_end(); ++it, ++src)
*it=src->end();
}
};
template <typename Row>
class CombArray_helper<Row, 3, false> { // reversed, !sparse
protected:
typedef Array<typename container_traits<Row>::reverse_iterator> it_container;
template <typename Iterator>
void init_begin(it_container& itc, Iterator& src)
{
for (typename Entire<it_container>::iterator it=entire(itc); !it.at_end(); ++it, ++src)
*it=src->rbegin();
}
template <typename Iterator>
void init_end(it_container& itc, Iterator& src)
{
for (typename Entire<it_container>::iterator it=entire(itc); !it.at_end(); ++it, ++src)
*it=src->rend();
}
};
template <typename Row, int is_reverse>
class CombArray_helper<Row, is_reverse, false>
: public CombArray_helper<Row, is_reverse+2, false> {
protected:
typedef typename CombArray_helper<Row, is_reverse+2, false>::it_container it_container;
void incr(it_container& itc, int& index)
{
for (typename Entire<it_container>::iterator it=entire(itc); !it.at_end(); ++it)
++(*it);
!is_reverse ? ++index : --index;
}
public:
typedef mlist< ContainerTag< it_container >,
OperationTag< BuildUnary<operations::dereference> > >
manip_traits;
it_container& get_container() { return static_cast<CombArray<Row, is_reverse>*>(this)->it_array; }
const it_container& get_container() const { return static_cast<const CombArray<Row, is_reverse>*>(this)->it_array; }
};
template <typename Row>
class CombArray_helper<Row, 2, true> { // !reversed, sparse
protected:
typedef Array< std::pair<typename container_traits<Row>::iterator, Row*> > it_container;
template <typename Iterator>
void init_begin(it_container& itc, Iterator& src)
{
for (typename Entire<it_container>::iterator it=entire(itc); !it.at_end(); ++it, ++src)
it->first=(it->second=&*src)->begin();
}
template <typename Iterator>
void init_end(it_container& itc, Iterator& src)
{
for (typename Entire<it_container>::iterator it=entire(itc); !it.at_end(); ++it, ++src)
it->first=(it->second=&*src)->end();
}
};
template <typename Row>
class CombArray_helper<Row, 3, true> { // reversed, sparse
protected:
typedef Array< std::pair<typename container_traits<Row>::reverse_iterator, Row*> > it_container;
template <typename Iterator>
void init_begin(it_container& itc, Iterator& src)
{
for (typename Entire<it_container>::iterator it=entire(itc); !it.at_end(); ++it, ++src)
it->first=(it->second=&*src)->rbegin();
}
template <typename Iterator>
void init_end(it_container& itc, Iterator& src)
{
for (typename Entire<it_container>::iterator it=entire(itc); !it.at_end(); ++it, ++src)
it->first=(it->second=&*src)->rend();
}
};
template <typename Row, int is_reverse>
class CombArray_helper<Row, is_reverse, true>
: public CombArray_helper<Row, is_reverse+2, true> {
protected:
typedef typename CombArray_helper<Row, is_reverse+2, true>::it_container it_container;
class it_filter {
public:
typedef typename it_container::value_type::first_type argument_type;
typedef bool result_type;
it_filter(int index_arg=0) : index(index_arg) {}
bool operator() (const argument_type& it) const
{
return !it.at_end() && test(it, std::is_same<typename object_traits<typename deref<Row>::type>::generic_tag, is_set>());
}
protected:
int index;
bool test(const argument_type& it, std::false_type) const { return it.index()==index; }
bool test(const argument_type& it, std::true_type) const { return *it==index; }
};
static it_container& get_c(CombArray<Row, is_reverse>& cv) { return cv.it_array; }
static const it_container& get_c(const CombArray<Row, is_reverse>& cv) { return cv.it_array; }
static int get_i(const CombArray<Row, is_reverse>& cv) { return cv.index; }
class intermediate
: public modified_container_impl< intermediate,
mlist< ContainerTag< it_container >,
OperationTag< operations::composed11<BuildUnary<operations::take_first>,
it_filter> >,
IteratorConstructorTag< unary_predicate_selector_constructor >,
ExpectedFeaturesTag< indexed >,
HiddenTag< CombArray<Row, is_reverse> > > > {
typedef modified_container_impl<intermediate> base_t;
public:
it_container& get_container() { return get_c(this->hidden()); }
const it_container& get_container() const { return get_c(this->hidden()); }
typename base_t::operation get_operation() const { return it_filter(get_i(this->hidden())); }
};
void incr(it_container& itc, int& index)
{
const it_filter cf(index);
for (typename Entire<it_container>::iterator it=entire(itc); !it.at_end(); ++it)
if (cf(it->first)) ++it->first;
!is_reverse ? ++index : --index;
}
public:
typedef typename std::conditional< std::is_same<typename object_traits<typename deref<Row>::type>::generic_tag, is_set>::value,
BuildUnaryIt<operations::index2element>,
operations::composed11<BuildUnary<operations::take_first>,
BuildUnary<operations::dereference> > >::type
access_op;
typedef mlist< ContainerTag<intermediate>, OperationTag<access_op> > manip_traits;
intermediate& get_container() { return reinterpret_cast<intermediate&>(*this); }
const intermediate& get_container() const { return reinterpret_cast<const intermediate&>(*this); }
void insert(int i)
{
typename it_container::reference it_vec=this->hidden().it_array[i];
it_vec.first=it_vec.second->insert(it_vec.first, this->hidden().index);
}
template <typename Iterator, typename enabled=typename std::enable_if<is_derived_from<Iterator, typename intermediate::iterator>::value>::type>
void insert(const Iterator&, int i)
{
insert(i);
}
template <typename Iterator, typename Data, typename enabled=typename std::enable_if<is_derived_from<Iterator, typename intermediate::iterator>::value>::type>
void insert(const Iterator&, int i, const Data& d)
{
typename it_container::reference it_vec=this->hidden().it_array[i];
it_vec.first=it_vec.second->insert(it_vec.first, this->hidden().index, d);
}
void erase(int i)
{
typename it_container::reference it_vec=this->hidden().it_array[i];
it_vec.second->erase(it_vec.first++);
}
template <typename Iterator, typename enabeld=typename std::enable_if<is_derived_from<Iterator, typename intermediate::iterator>::value>::type>
void erase(const Iterator& pos)
{
erase(pos.index());
}
};
template <typename Row, int is_reverse>
class CombArray
: public CombArray_helper<Row, is_reverse>
, public modified_container_impl< CombArray<Row, is_reverse>,
typename CombArray_helper<Row, is_reverse>::manip_traits >
, public inherit_generic< CombArray<Row, is_reverse>, typename deref<Row>::type >::type {
typedef CombArray_helper<Row, is_reverse> helper_t;
friend class comb_iterator<Row, is_reverse>;
template <typename, int> friend class CombArray;
friend class CombArray_helper<Row, is_reverse>;
protected:
typename helper_t::it_container it_array;
int index;
typedef typename inherit_const<CombArray<typename deref<Row>::type, is_reverse>, Row>::type nonconst_arg;
public:
CombArray() {}
CombArray(const CombArray& other)
: it_array(other.it_array)
, index(other.index) {}
CombArray(nonconst_arg& other)
: it_array(reinterpret_cast<const typename helper_t::it_container&>(other.it_array))
, index(other.index) {}
CombArray& operator= (const CombArray& other)
{
return CombArray::generic_type::operator=(other);
}
using CombArray::generic_type::operator=;
template <typename Iterator>
CombArray(int n, Iterator src)
: it_array(n), index(!is_reverse ? 0 : n-1)
{
this->init_begin(it_array, src);
}
template <typename Iterator>
CombArray(int n, maximal<int>, Iterator src)
: it_array(n), index(!is_reverse ? n : -1)
{
this->init_end(it_array, src);
}
template <typename Iterator>
CombArray(int n, int index_arg, Iterator src)
: it_array(n), index(index_arg)
{
for (typename Entire<typename helper_t::it_container>::iterator it=entire(it_array); !it.at_end(); ++it, ++src)
*it=src->begin()+index;
}
int dim() const { return it_array.size(); }
protected:
void copy(const CombArray& other)
{
it_array=other.it_array;
index=other.index;
}
void copy(nonconst_arg& other)
{
it_array=reinterpret_cast<const typename helper_t::it_container&>(other.it_array);
index=other.index;
}
void incr()
{
helper_t::incr(it_array, index);
}
};
template <typename Row, int is_reverse>
class comb_iterator {
public:
typedef CombArray<Row, is_reverse> value_type;
typedef typename inherit_const<value_type, Row>::type& reference;
typedef typename inherit_const<value_type, Row>::type* pointer;
typedef forward_iterator_tag iterator_category;
typedef ptrdiff_t difference_type;
typedef comb_iterator<typename deref<Row>::type, is_reverse> iterator;
typedef comb_iterator<const typename deref<Row>::type, is_reverse> const_iterator;
comb_iterator() {}
comb_iterator(const iterator& it)
: cv(it.value) {}
comb_iterator& operator= (const const_iterator& it)
{
cv.copy(it.cv);
return *this;
}
comb_iterator& operator= (typename assign_const<iterator, !std::is_same<iterator, comb_iterator>::value>::type& it)
{
cv.copy(it.cv);
return *this;
}
template <typename Iterator>
comb_iterator(int m, int n, Iterator src)
: cv(m,src), _last(n) {}
template <typename Iterator>
comb_iterator(int m, int n, maximal<int>, Iterator src)
: cv(m,maximal<int>(),src), _last(n) {}
template <typename Iterator>
comb_iterator(int m, int n, int index_arg, Iterator src)
: cv(m,index_arg,src), _last(n) {}
reference operator* () const
{
return const_cast<reference>(cv);
}
pointer operator-> () const
{
return const_cast<pointer>(&cv);
}
comb_iterator& operator++ () { cv.incr(); return *this; }
const comb_iterator operator++ (int) { comb_iterator copy=*this; operator++(); return copy; }
template <typename Other>
typename std::enable_if<is_among<Other, iterator, const_iterator>::value, bool>::type
operator== (const Other& it) const { return index()==it.index(); }
template <typename Other>
typename std::enable_if<is_among<Other, iterator, const_iterator>::value, bool>::type
operator!= (const Other& it) const { return !operator==(it); }
bool at_end() const { return index()==_last; }
int index() const { return cv.index; }
protected:
value_type cv;
int _last;
};
template <typename Row, int is_reverse>
struct check_iterator_feature<comb_iterator<Row, is_reverse>, end_sensitive> : std::true_type {};
template <typename Row, int is_reverse>
struct check_iterator_feature<comb_iterator<Row, is_reverse>, indexed> : std::true_type {};
template <typename Row, int is_reverse>
struct check_container_feature<CombArray<Row, is_reverse>, sparse>
: check_container_ref_feature<Row, sparse> {};
template <typename Row, int is_reverse>
struct check_container_feature<CombArray<Row, is_reverse>, pure_sparse>
: check_container_ref_feature<Row, pure_sparse> {};
template <typename Row>
struct ListMatrix_data {
std::list<Row> R;
int dimr, dimc;
ListMatrix_data() : dimr(0), dimc(0) {}
void clear()
{
dimr=dimc=0;
R.clear();
}
};
template <typename Matrix, typename Row, typename Category=typename container_traits<Row>::category>
class ListMatrix_cols {
protected:
typedef Matrix hidden_type;
hidden_type& hidden() { return reinterpret_cast<hidden_type&>(*this); }
const hidden_type& hidden() const { return reinterpret_cast<const hidden_type&>(*this); }
public:
typedef comb_iterator<Row,0> iterator;
typedef comb_iterator<const Row,0> const_iterator;
typedef CombArray<Row,0> value_type;
typedef value_type reference;
typedef CombArray<const Row,0> const_reference;
typedef Category container_category;
iterator begin()
{
return iterator(hidden().rows(), hidden().cols(), hidden().data->R.begin());
}
iterator end()
{
return iterator(hidden().rows(), hidden().cols(), maximal<int>(), hidden().data->R.begin());
}
const_iterator begin() const
{
return const_iterator(hidden().rows(), hidden().cols(), hidden().data->R.begin());
}
const_iterator end() const
{
return const_iterator(hidden().rows(), hidden().cols(), maximal<int>(), hidden().data->R.begin());
}
reference front()
{
return reference(hidden().rows(), hidden().data->R.begin());
}
const_reference front() const
{
return const_reference(hidden().rows(), hidden().data->R.begin());
}
int size() const { return hidden().cols(); }
bool empty() const { return size()==0; }
void resize(int n) { hidden().resize(hidden().rows(), n); }
};
template <typename Matrix, typename Row>
class ListMatrix_cols<Matrix, Row, bidirectional_iterator_tag>
: public ListMatrix_cols<Matrix, Row, forward_iterator_tag> {
public:
typedef comb_iterator<Row,1> reverse_iterator;
typedef comb_iterator<const Row,1> const_reverse_iterator;
typedef bidirectional_iterator_tag container_category;
reverse_iterator rbegin()
{
return reverse_iterator(this->hidden().rows(), this->hidden().cols(), this->hidden().data->R.begin());
}
reverse_iterator rend()
{
return reverse_iterator(this->hidden().rows(), this->hidden().cols(), maximal<int>(), this->hidden().data->R.begin());
}
const_reverse_iterator rbegin() const
{
return const_reverse_iterator(this->hidden().rows(), this->hidden().cols(), this->hidden().data->R.begin());
}
const_reverse_iterator rend() const
{
return reverse_iterator(this->hidden().rows(), this->hidden().cols(), maximal<int>(), this->hidden().data->R.begin());
}
CombArray<Row,1> back()
{
return CombArray<Row,1>(this->hidden().rows(), this->hidden().data->R.begin());
}
CombArray<const Row,1> back() const
{
return CombArray<const Row,1>(this->hidden().rows(), this->hidden().data->R.begin());
}
};
template <typename Matrix, typename Row>
class ListMatrix_cols<Matrix, Row, random_access_iterator_tag>
: public ListMatrix_cols<Matrix, Row, bidirectional_iterator_tag> {
public:
typedef random_access_iterator_tag container_category;
CombArray<Row,0> operator[] (int c)
{
return CombArray<Row,0>(this->hidden().rows(), c, this->hidden().data->R.begin());
}
CombArray<const Row,0> operator[] (int c) const
{
return CombArray<const Row,0>(this->hidden().rows(), c, this->hidden().data->R.begin());
}
};
} // end namespace pm
namespace polymake {
using pm::CombArray;
}
#endif // POLYMAKE_INTERNAL_COMB_ARRAY_H
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