mirror of
https://github.com/yuzu-emu/ext-boost
synced 2024-11-25 09:28:54 +00:00
368 lines
12 KiB
C++
368 lines
12 KiB
C++
/*-----------------------------------------------------------------------------+
|
|
Copyright (c) 2008-2009: Joachim Faulhaber
|
|
+------------------------------------------------------------------------------+
|
|
Distributed under the Boost Software License, Version 1.0.
|
|
(See accompanying file LICENCE.txt or copy at
|
|
http://www.boost.org/LICENSE_1_0.txt)
|
|
+-----------------------------------------------------------------------------*/
|
|
#ifndef BOOST_ICL_INTERVAL_SUBSET_COMPARER_HPP_JOFA_090827
|
|
#define BOOST_ICL_INTERVAL_SUBSET_COMPARER_HPP_JOFA_090827
|
|
|
|
#include <boost/icl/type_traits/is_map.hpp>
|
|
#include <boost/icl/detail/notate.hpp>
|
|
#include <boost/icl/detail/relation_state.hpp>
|
|
#include <boost/icl/type_traits/identity_element.hpp>
|
|
#include <boost/icl/type_traits/is_concept_equivalent.hpp>
|
|
#include <boost/icl/type_traits/is_interval_container.hpp>
|
|
#include <boost/icl/type_traits/is_set.hpp>
|
|
#include <boost/icl/concept/interval_set_value.hpp>
|
|
|
|
namespace boost{namespace icl
|
|
{
|
|
|
|
#ifdef BOOST_MSVC
|
|
#pragma warning(push)
|
|
#pragma warning(disable:4127) // conditional expression is constant
|
|
#endif
|
|
|
|
namespace Interval_Set
|
|
{
|
|
|
|
//------------------------------------------------------------------------------
|
|
template<class LeftT, class RightT>
|
|
struct settic_codomain_compare
|
|
{
|
|
static int apply(typename LeftT::const_iterator& left_, typename RightT::const_iterator& right_)
|
|
{
|
|
return inclusion_compare( icl::co_value<LeftT>(left_),
|
|
icl::co_value<RightT>(right_));
|
|
}
|
|
};
|
|
|
|
template<class LeftT, class RightT>
|
|
struct atomic_codomain_compare
|
|
{
|
|
static int apply(typename LeftT::const_iterator& left_, typename RightT::const_iterator& right_)
|
|
{
|
|
if(icl::co_value<LeftT>(left_) == icl::co_value<RightT>(right_))
|
|
return inclusion::equal;
|
|
else
|
|
return inclusion::unrelated;
|
|
}
|
|
};
|
|
|
|
template<class LeftT, class RightT>
|
|
struct empty_codomain_compare
|
|
{
|
|
static int apply(typename LeftT::const_iterator&, typename RightT::const_iterator)
|
|
{
|
|
return inclusion::equal;
|
|
}
|
|
};
|
|
|
|
template<class LeftT, class RightT>
|
|
struct map_codomain_compare
|
|
{
|
|
static int apply(typename LeftT::const_iterator& left_, typename RightT::const_iterator& right_)
|
|
{
|
|
using namespace boost::mpl;
|
|
typedef typename LeftT::codomain_type LeftCodomainT;
|
|
typedef typename RightT::codomain_type RightCodomainT;
|
|
|
|
return
|
|
if_<
|
|
bool_<is_concept_equivalent<is_set,LeftCodomainT,
|
|
RightCodomainT>::value>,
|
|
settic_codomain_compare<LeftT,RightT>,
|
|
atomic_codomain_compare<LeftT,RightT>
|
|
>
|
|
::type::apply(left_, right_);
|
|
}
|
|
};
|
|
|
|
|
|
//------------------------------------------------------------------------------
|
|
template<class LeftT, class RightT>
|
|
class subset_comparer
|
|
{
|
|
private:
|
|
subset_comparer& operator = (const subset_comparer&);
|
|
public:
|
|
typedef typename LeftT::const_iterator LeftIterT;
|
|
typedef typename RightT::const_iterator RightIterT;
|
|
|
|
BOOST_STATIC_CONSTANT(bool,
|
|
_compare_codomain = (mpl::and_<is_map<LeftT>, is_map<RightT> >::value));
|
|
|
|
|
|
subset_comparer(const LeftT& left,
|
|
const RightT& right,
|
|
const LeftIterT& left_end,
|
|
const RightIterT& right_end)
|
|
: _left(left), _right(right),
|
|
_left_end(left_end), _right_end(right_end), _result(equal)
|
|
{}
|
|
|
|
enum{nextboth, nextleft, nextright, stop};
|
|
|
|
enum
|
|
{
|
|
unrelated = inclusion::unrelated,
|
|
subset = inclusion::subset, // left is_subset_of right
|
|
superset = inclusion::superset, // left is_superset_of right
|
|
equal = inclusion::equal // equal = subset | superset
|
|
};
|
|
|
|
int result()const{ return _result; }
|
|
|
|
|
|
int co_compare(LeftIterT& left, RightIterT& right)
|
|
{
|
|
using namespace boost::mpl;
|
|
|
|
return
|
|
if_<
|
|
bool_<is_concept_equivalent<is_interval_map,LeftT,RightT>::value>,
|
|
map_codomain_compare<LeftT,RightT>,
|
|
empty_codomain_compare<LeftT,RightT>
|
|
>
|
|
::type::apply(left,right);
|
|
}
|
|
|
|
int restrict_result(int state) { return _result &= state; }
|
|
|
|
int proceed(LeftIterT& left, RightIterT& right)
|
|
{
|
|
if(upper_less(key_value<LeftT>(left), key_value<RightT>(right)))
|
|
{ // left ..)
|
|
// right .....)
|
|
_prior_left = left;
|
|
++left;
|
|
return nextleft;
|
|
}
|
|
else if(upper_less(key_value<RightT>(right), key_value<LeftT>(left)))
|
|
{ // left .....)
|
|
// right ..)
|
|
_prior_right = right;
|
|
++right;
|
|
return nextright;
|
|
}
|
|
else//key_value<LeftT>(left).upper_equal(key_value<RightT>(right))
|
|
{ // left ..)
|
|
// right ..)
|
|
++left;
|
|
++right;
|
|
return nextboth;
|
|
}
|
|
}
|
|
|
|
int next_both(LeftIterT& left, RightIterT& right)
|
|
{
|
|
if(left == _left_end && right == _right_end)
|
|
return stop;
|
|
else if(left == _left_end)
|
|
{ // left: ....end left could be subset
|
|
// right:....[..
|
|
restrict_result(subset);
|
|
return stop;
|
|
}
|
|
else if(right == _right_end)
|
|
{ // left: ....[.. left could be superset
|
|
// right:....end
|
|
restrict_result(superset);
|
|
return stop;
|
|
}
|
|
else if(exclusive_less(key_value<LeftT>(left), key_value<RightT>(right)))
|
|
{ // left: [..) . . .[---) left could be superset
|
|
// right: [..).... if [---) exists
|
|
restrict_result(superset);
|
|
if(unrelated == _result)
|
|
return stop;
|
|
else
|
|
{
|
|
LeftIterT joint_ = _left.lower_bound(key_value<RightT>(right));
|
|
if(joint_ == _left.end())
|
|
{
|
|
_result = unrelated;
|
|
return stop;
|
|
}
|
|
else
|
|
{
|
|
left = joint_;
|
|
return nextboth;
|
|
}
|
|
}
|
|
}
|
|
else if(exclusive_less(key_value<RightT>(right), key_value<LeftT>(left)))
|
|
{ // left: [.. left could be subset
|
|
// right:....) . . .[---) if [---) exists
|
|
restrict_result(subset);
|
|
if(unrelated == _result)
|
|
return stop;
|
|
else
|
|
{
|
|
RightIterT joint_ = _right.lower_bound(key_value<LeftT>(left));
|
|
if(joint_ == _right.end())
|
|
{
|
|
_result = unrelated;
|
|
return stop;
|
|
}
|
|
else
|
|
{
|
|
right = joint_;
|
|
return nextboth;
|
|
}
|
|
}
|
|
}
|
|
|
|
// left and right have intervals with nonempty intersection:
|
|
if(_compare_codomain)
|
|
if(unrelated == restrict_result(co_compare(left,right)))
|
|
return stop;
|
|
|
|
// examine left borders only. Right borders are checked in proceed
|
|
if(lower_less(key_value<LeftT>(left), key_value<RightT>(right)))
|
|
{ // left: ....[... left could be superset
|
|
// right:.... [..
|
|
if(unrelated == restrict_result(superset))
|
|
return stop;
|
|
}
|
|
else if(lower_less(key_value<RightT>(right), key_value<LeftT>(left)))
|
|
{ // left: .... [.. left can be subset
|
|
// right:....[...
|
|
if(unrelated == restrict_result(subset))
|
|
return stop;
|
|
}
|
|
//else key_value<LeftT>(right).lower_equal(key_value<RightT>(left))
|
|
// left: ....[.. both can be equal
|
|
// right:....[..
|
|
// nothing to do: proceed
|
|
|
|
return proceed(left, right);
|
|
}
|
|
|
|
int next_left(LeftIterT& left, RightIterT& right)
|
|
{
|
|
if(left == _left_end)
|
|
{ // left: ..)end left could be subset
|
|
// right:......)
|
|
restrict_result(subset);
|
|
return stop;
|
|
}
|
|
else if(!touches(key_value<LeftT>(_prior_left), key_value<LeftT>(left)))
|
|
{ // left: ..) [..
|
|
// right:.........)
|
|
if(lower_less(key_value<RightT>(right), key_value<LeftT>(left)))
|
|
{ // ..) [.. left could be subset
|
|
// ..........)
|
|
if(unrelated == restrict_result(subset))
|
|
return stop;
|
|
}
|
|
//else ..) [...
|
|
// [..
|
|
if(_compare_codomain && intersects(key_value<LeftT>(left),key_value<RightT>(right)) )
|
|
if(unrelated == restrict_result(co_compare(left,right)))
|
|
return stop;
|
|
}
|
|
else
|
|
{ // left: ..)[.. left could be subset
|
|
// right:.......)
|
|
if(_compare_codomain && intersects(key_value<LeftT>(left), key_value<RightT>(right)) )
|
|
if(unrelated == restrict_result(co_compare(left,right)))
|
|
return stop;
|
|
}
|
|
|
|
return proceed(left, right);
|
|
}
|
|
|
|
|
|
int next_right(LeftIterT& left, RightIterT& right)
|
|
{
|
|
if(right == _right_end)
|
|
{ // left: ......) left could be superset
|
|
// right:..)end
|
|
restrict_result(superset);
|
|
return stop;
|
|
}
|
|
else if(!touches(key_value<RightT>(_prior_right), key_value<RightT>(right)))
|
|
{ // left: .........)
|
|
// right:..) [..
|
|
if(lower_less(key_value<LeftT>(left), key_value<RightT>(right)))
|
|
{ // [....) left could be superset
|
|
// ..) [..
|
|
if(unrelated == restrict_result(superset))
|
|
return stop;
|
|
}
|
|
//else [....)
|
|
// ..) [..
|
|
if(_compare_codomain && intersects(key_value<LeftT>(left), key_value<RightT>(right)) )
|
|
if(unrelated == restrict_result(co_compare(left,right)))
|
|
return stop;
|
|
}
|
|
else
|
|
{
|
|
if(_compare_codomain && intersects(key_value<LeftT>(left), key_value<RightT>(right)) )
|
|
if(unrelated == restrict_result(co_compare(left,right)))
|
|
return stop;
|
|
}
|
|
|
|
return proceed(left, right);
|
|
}
|
|
|
|
private:
|
|
const LeftT& _left;
|
|
const RightT& _right;
|
|
LeftIterT _left_end;
|
|
RightIterT _right_end;
|
|
LeftIterT _prior_left;
|
|
RightIterT _prior_right;
|
|
int _result;
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Subset/superset comparison on ranges of two interval container
|
|
//------------------------------------------------------------------------------
|
|
template<class LeftT, class RightT>
|
|
int subset_compare
|
|
(
|
|
const LeftT& left, //sub
|
|
const RightT& right, //super
|
|
typename LeftT::const_iterator left_begin,
|
|
typename LeftT::const_iterator left_end,
|
|
typename RightT::const_iterator right_begin,
|
|
typename RightT::const_iterator right_end
|
|
)
|
|
{
|
|
typedef subset_comparer<LeftT,RightT> Step;
|
|
Step step(left, right, left_end, right_end);
|
|
|
|
typename LeftT::const_iterator left_ = left_begin;
|
|
typename RightT::const_iterator right_ = right_begin;
|
|
|
|
int state = Step::nextboth;
|
|
while(state != Step::stop)
|
|
{
|
|
switch(state){
|
|
case Step::nextboth: state = step.next_both(left_, right_); break;
|
|
case Step::nextleft: state = step.next_left(left_, right_); break;
|
|
case Step::nextright: state = step.next_right(left_, right_); break;
|
|
}
|
|
}
|
|
return step.result();
|
|
}
|
|
|
|
|
|
} // namespace Interval_Set
|
|
|
|
#ifdef BOOST_MSVC
|
|
#pragma warning(pop)
|
|
#endif
|
|
|
|
}} // namespace icl boost
|
|
|
|
#endif
|
|
|