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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright The KiCad Developers, see AUTHORS.txt for contributors.
*
* 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 3 of the License, or (at your
* option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <layer_ids.h>
#ifndef LAYER_RANGE_H
#define LAYER_RANGE_H
class LAYER_RANGE
{
private:
PCB_LAYER_ID m_start;
PCB_LAYER_ID m_stop;
int m_layer_count;
class LAYER_RANGE_ITERATOR
{
private:
int m_current;
int m_stop;
int m_layer_count;
bool m_reverse;
int next_layer( int aLayer )
{
if( m_reverse )
{
if( aLayer == B_Cu )
aLayer = m_layer_count == 2 ? F_Cu :
static_cast<int>( F_Cu ) + 2 * ( m_layer_count - 2 ) + 2;
else if( aLayer == m_stop || aLayer == UNDEFINED_LAYER )
aLayer = UNDEFINED_LAYER;
else if( aLayer == In1_Cu )
aLayer = F_Cu;
else
aLayer = static_cast<int>( aLayer ) - 2;
}
else
{
if( aLayer == F_Cu && m_layer_count == 2 )
aLayer = B_Cu;
else if( aLayer == m_stop || aLayer == UNDEFINED_LAYER )
aLayer = UNDEFINED_LAYER;
else if( aLayer == static_cast<int>( F_Cu ) + 2 * ( m_layer_count - 2 ) + 2)
aLayer = B_Cu;
else if( aLayer == F_Cu )
aLayer = In1_Cu;
else
aLayer = static_cast<int>( aLayer ) + 2;
}
return aLayer;
}
public:
using iterator_category = std::bidirectional_iterator_tag;
using value_type = PCB_LAYER_ID;
using difference_type = std::ptrdiff_t;
using pointer = PCB_LAYER_ID*;
using reference = PCB_LAYER_ID&;
LAYER_RANGE_ITERATOR( PCB_LAYER_ID start, PCB_LAYER_ID stop, int layer_count ) :
m_current( start ), m_stop( stop ), m_layer_count( layer_count )
{
if( start & 1 || stop & 1 )
throw std::invalid_argument( "Only works for copper layers" );
if( stop == B_Cu || m_stop >= m_current )
m_reverse = false;
else
m_reverse = true;
}
PCB_LAYER_ID operator*() const { return static_cast<PCB_LAYER_ID>( m_current ); }
LAYER_RANGE_ITERATOR& operator++()
{
m_current = next_layer( m_current );
return *this;
}
LAYER_RANGE_ITERATOR operator++( int )
{
LAYER_RANGE_ITERATOR tmp = *this;
++( *this );
return tmp;
}
bool operator==( const LAYER_RANGE_ITERATOR& other ) const
{
return m_current == other.m_current;
}
bool operator!=( const LAYER_RANGE_ITERATOR& other ) const { return !( *this == other ); }
};
public:
LAYER_RANGE( PCB_LAYER_ID start, PCB_LAYER_ID stop, int layer_count ) :
m_start( start ), m_stop( stop ), m_layer_count( layer_count )
{
if( start & 1 || stop & 1 )
throw std::invalid_argument( "Only works for copper layers" );
}
LAYER_RANGE_ITERATOR begin() const { return LAYER_RANGE_ITERATOR( m_start, m_stop,
m_layer_count ); }
LAYER_RANGE_ITERATOR end() const
{
auto it = LAYER_RANGE_ITERATOR( m_stop, m_stop, m_layer_count );
return ++it;
}
static bool Contains( int aStart_layer, int aEnd_layer, int aTest_layer )
{
// B_Cu is the lowest copper layer for Z order copper layers
// F_cu = top, B_Cu = bottom
// So set the distance from top for B_Cu to INT_MAX
if( aTest_layer == B_Cu )
aTest_layer = INT_MAX;
if( aStart_layer == B_Cu )
aStart_layer = INT_MAX;
if( aEnd_layer == B_Cu )
aEnd_layer = INT_MAX;
if( aStart_layer > aEnd_layer )
std::swap( aStart_layer, aEnd_layer );
return aTest_layer >= aStart_layer && aTest_layer <= aEnd_layer;
}
bool Contains( int aTest_layer )
{
return Contains( m_start, m_stop, aTest_layer );
}
size_t size() const
{
if( m_start == B_Cu )
return m_layer_count;
else
return ( m_stop - m_start ) / 2 + 1;
}
};
#endif // LAYER_RANGE_H
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