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/***************************************************************************
ksection.h - description
-------------------
begin : Sun 22.06.2003
copyright : (C) 2003 by Friedrich W. H. Kossebau
email : [email protected]
****************************************************************************/
/***************************************************************************
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License version 2 as published by the Free Software Foundation. *
* *
***************************************************************************/
#ifndef KHE_KSECTION_H
#define KHE_KSECTION_H
#include "krange.h"
namespace KHE
{
/** describes a section of indizes
*@author Friedrich W. H. Kossebau
*/
class KSection : public KRange<int>
{
public:
/** constructs a section
* @param SI starting index
* @param EI end index
*/
KSection( int SI, int EI );
/** constructs a section
* @param SI starting index
* @param W width of the section
*/
KSection( int SI, int W, bool );
KSection();
~KSection();
public:
KSection &operator=( const KSection &S );
public:
bool operator==( const KSection &S ) const;
public:
void setByWidth( int S, int Width );
/** sets the first index of the section's range one behind the other's end
* If one of both is invalid the behaviour is undefined
*/
void setStartBehind( KSection S );
/** sets the first index of the section's range one behind the other's end
* If one of both is invalid or the other' start is 0 the behaviour is undefined
*/
void setEndBefore( KSection S );
/** sets the first index of the section's range to be width-1 before the end
* If the section is invalid the behaviour is undefined
*/
void setStartByWidth( int Width );
/** sets the last index of the section's range to be width-1 behind the start
* If the section is invalid the behaviour is undefined
*/
void setEndByWidth( int Width );
/** moves the range defined by a new start.
* If the range is invalid the behaviour is undefined
*/
void moveToStart( int S );
/** moves the range defined by a new start.
* If the range is invalid the behaviour is undefined
*/
void moveToEnd( int E );
public:
/**
* @return the numbered of included indizes or 0, if the section is invalid
*/
int width() const;
};
inline KSection::KSection( int SI, int EI ) : KRange<int>(SI,EI) {}
inline KSection::KSection( int SI, int W, bool ) : KRange<int>(SI,SI+W-1) {}
inline KSection::KSection() {}
inline KSection::~KSection() {}
inline bool KSection::operator==( const KSection &S ) const { return KRange<int>::operator==(S); }
inline KSection &KSection::operator=( const KSection &S ) { KRange<int>::operator=(S); return *this; }
inline int KSection::width() const { return isValid() ? end()-start()+1 : 0; }
inline void KSection::setByWidth( int S, int Width ) { setStart( S ); setEnd( S+Width-1 ); }
inline void KSection::setStartByWidth( int Width ) { setStart( end()-Width+1 ); }
inline void KSection::setEndByWidth( int Width ) { setEnd( start()+Width-1 ); }
inline void KSection::setStartBehind( KSection S ) { setStart( S.end()+1 ); }
inline void KSection::setEndBefore( KSection S ) { setEnd( S.start()-1 ); }
inline void KSection::moveToStart( int S ) { setEnd( S+width()-1 ); setStart( S ); }
inline void KSection::moveToEnd( int E ) { setStart( E-width()+1 ); setEnd( E ); }
}
#endif
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