1 files changed, 129 insertions, 0 deletions
diff --git a/pcbnew/router/pns_layerset.h b/pcbnew/router/pns_layerset.h
new file mode 100644
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+++ b/pcbnew/router/pns_layerset.h
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+/*
+ * KiRouter - a push-and-(sometimes-)shove PCB router
+ *
+ * Copyright (C) 2013-2014 CERN
+ * Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
+ *
+ * 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/>.
+ */
+
+#ifndef __PNS_LAYERSET_H
+#define __PNS_LAYERSET_H
+
+#include <algorithm>
+
+/**
+ * Class PNS_LAYERSET
+ *
+ * Represents a contiguous set of PCB layers.
+ */
+class PNS_LAYERSET
+{
+public:
+    PNS_LAYERSET() :
+        m_start( -1 ),
+        m_end( -1 )
+    {};
+
+    PNS_LAYERSET( int aStart, int aEnd )
+    {
+        if( aStart > aEnd )
+            std::swap( aStart, aEnd );
+
+        m_start = aStart;
+        m_end = aEnd;
+    }
+
+    PNS_LAYERSET( int aLayer )
+    {
+        m_start = m_end = aLayer;
+    }
+
+    PNS_LAYERSET( const PNS_LAYERSET& aB ) :
+        m_start( aB.m_start ),
+        m_end( aB.m_end )
+    {}
+
+    ~PNS_LAYERSET() {};
+
+    const PNS_LAYERSET& operator=( const PNS_LAYERSET& aB )
+    {
+        m_start = aB.m_start;
+        m_end = aB.m_end;
+        return *this;
+    }
+
+    bool Overlaps( const PNS_LAYERSET& aOther ) const
+    {
+        return m_end >= aOther.m_start && m_start <= aOther.m_end;
+    }
+
+    bool Overlaps( const int aLayer ) const
+    {
+        return aLayer >= m_start && aLayer <= m_end;
+    }
+
+    bool IsMultilayer() const
+    {
+        return m_start != m_end;
+    }
+
+    int Start() const
+    {
+        return m_start;
+    }
+
+    int End() const
+    {
+        return m_end;
+    }
+
+    void Merge( const PNS_LAYERSET& aOther )
+    {
+        if( m_start < 0 || m_end < 0 )
+        {
+            m_start = aOther.m_start;
+            m_end = aOther.m_end;
+            return;
+        }
+
+        if( aOther.m_start < m_start )
+            m_start = aOther.m_start;
+
+        if( aOther.m_end > m_end )
+            m_end = aOther.m_end;
+    }
+
+    ///> Shortcut for comparisons/overlap tests
+    static PNS_LAYERSET All()
+    {
+        return PNS_LAYERSET( 0, 256 ); // fixme: use layer IDs header
+    }
+
+    bool operator==( const PNS_LAYERSET& aOther ) const
+    {
+        return ( m_start == aOther.m_start ) && ( m_end == aOther.m_end );
+    }
+
+    bool operator!=( const PNS_LAYERSET& aOther ) const
+    {
+        return ( m_start != aOther.m_start ) || ( m_end != aOther.m_end );
+    }
+
+private:
+    int m_start;
+    int m_end;
+};
+
+#endif    // __PNS_LAYERSET_H