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color_view.hpp
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/* mockturtle: C++ logic network library
* Copyright (C) 2018-2022 EPFL
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/*!
\file color_view.hpp
\brief Manager view for traversal IDs, called colors
\author Heinz Riener
\author Siang-Yun (Sonia) Lee
*/
#pragma once
namespace mockturtle
{
/*!\brief Manager view for traversal IDs (in-place storage).
*
* Traversal IDs, called colors, are unsigned integers that can be
* assigned to nodes. The corresponding values are stored in-place in
* the flags of the underlying of the network.
*/
template<typename Ntk>
class color_view : public Ntk
{
public:
using storage = typename Ntk::storage;
using node = typename Ntk::node;
using signal = typename Ntk::signal;
public:
explicit color_view( Ntk const& ntk )
: Ntk( ntk )
{
static_assert( is_network_type_v<Ntk>, "Ntk is not a network type" );
}
/*! \brief Returns a new color and increases the current color */
uint32_t new_color() const
{
return ++this->_storage->trav_id;
// return ++value;
}
/*! \brief Returns the current color */
uint32_t current_color() const
{
return this->_storage->trav_id;
// return value;
}
/*! \brief Assigns all nodes to `color` */
void clear_colors( uint32_t color = 0 ) const
{
std::for_each( this->_storage->nodes.begin(), this->_storage->nodes.end(),
[color]( auto& n ) { n.data[1].h1 = color; } );
}
/*! \brief Returns the color of a node */
auto color( node const& n ) const
{
return this->_storage->nodes[n].data[1].h1;
}
/*! \brief Returns the color of a node */
template<typename _Ntk = Ntk, typename = std::enable_if_t<!std::is_same_v<typename _Ntk::signal, typename _Ntk::node>>>
auto color( signal const& n ) const
{
return this->_storage->nodes[this->get_node( n )].data[1].h1;
}
/*! \brief Assigns the current color to a node */
void paint( node const& n ) const
{
this->_storage->nodes[n].data[1].h1 = current_color();
}
/*! \brief Assigns `color` to a node */
void paint( node const& n, uint32_t color ) const
{
this->_storage->nodes[n].data[1].h1 = color;
}
/*! \brief Copies the color from `other` to `n` */
void paint( node const& n, node const& other ) const
{
this->_storage->nodes[n].data[1].h1 = color( other );
}
/*! \brief Evaluates a predicate on the color of a node */
template<typename Pred>
bool eval_color( node const& n, Pred&& pred ) const
{
return pred( color( n ) );
}
/*! \brief Evaluates a predicate on the colors of two nodes */
template<typename Pred>
bool eval_color( node const& a, node const& b, Pred&& pred ) const
{
return pred( color( a ), color( b ) );
}
/*! \brief Evaluates a predicate on the colors of the fanins of a node */
template<typename Pred>
bool eval_fanins_color( node const& n, Pred&& pred ) const
{
bool result = true;
this->foreach_fanin( n, [&]( signal const& fi ) {
if ( !pred( color( this->get_node( fi ) ) ) )
{
result = false;
return false;
}
return true;
} );
return result;
}
protected:
// mutable uint32_t value{0};
}; /* color_view */
/*!\brief Manager view for traversal IDs (out-of-place storage).
*
* Traversal IDs, called colors, are unsigned integers that can be
* assigned to nodes. The corresponding values are stored
* out-of-place in this view.
*/
template<typename Ntk>
class out_of_place_color_view : public Ntk
{
public:
using storage = typename Ntk::storage;
using node = typename Ntk::node;
using signal = typename Ntk::signal;
public:
explicit out_of_place_color_view( Ntk const& ntk )
: Ntk( ntk ), values( ntk.size() )
{
static_assert( is_network_type_v<Ntk>, "Ntk is not a network type" );
}
uint32_t new_color() const
{
return ++value;
}
uint32_t current_color() const
{
return value;
}
void clear_colors( uint32_t color = 0 ) const
{
std::for_each( std::begin( values ), std::end( values ),
[color]( auto& v ) { v = color; } );
}
auto color( node const& n ) const
{
return values[n];
}
template<typename _Ntk = Ntk, typename = std::enable_if_t<!std::is_same_v<typename _Ntk::signal, typename _Ntk::node>>>
auto color( signal const& n ) const
{
return values[this->get_node( n )];
}
void paint( node const& n ) const
{
values[n] = value;
}
void paint( node const& n, uint32_t color ) const
{
values[n] = color;
}
void paint( node const& n, node const& other ) const
{
values[n] = values[other];
}
/*! \brief Evaluates a predicate on the color of a node */
template<typename Pred>
bool eval_color( node const& n, Pred&& pred ) const
{
return pred( color( n ) );
}
/*! \brief Evaluates a predicate on the colors of two nodes */
template<typename Pred>
bool eval_color( node const& a, node const& b, Pred&& pred ) const
{
return pred( color( a ), color( b ) );
}
/*! \brief Evaluates a predicate on the colors of the fanins of a node */
template<typename Pred>
bool eval_fanins_color( node const& n, Pred&& pred ) const
{
bool result = true;
this->foreach_fanin( n, [&]( signal const& fi ) {
if ( !pred( color( this->get_node( fi ) ) ) )
{
result = false;
return false;
}
return true;
} );
return result;
}
protected:
mutable std::vector<uint32_t> values;
mutable uint32_t value{ 0 };
}; /* out_of_place_color_view */
} // namespace mockturtle

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