DiffRange.h++

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#ifndef __libquark_diff_DiffRange_hxx
#define __libquark_diff_DiffRange_hxx

#include <QDebug>

#include <quark/Quark.h++>

namespace quark {
namespace diff {

class DiffRange
{
  public:

  DiffRange()
    : _startIndex(0)
    , _length(0)
  { }

  DiffRange(int startIndex, int length)
    : _startIndex(startIndex)
    , _length(length)
  { }

  ~DiffRange()
  { }

  inline void setRange(int startIndex, int length)
  {
    _startIndex = startIndex;
    _length = length;
  }

  inline int startIndex() const
  { return(_startIndex); }

  inline int endIndex() const
  { return(_startIndex + ((_length > 0) ? (_length - 1) : 0)); }

  inline void setLength(int length)
  { _length = length; }

  inline int length() const
  { return(_length); }

  inline bool isEmpty() const
  { return(_length == 0); }

  inline bool isValid() const
  { return(_startIndex > 0); }

  inline bool containsIndex(int index) const
  { return((index >= _startIndex) && (index <= endIndex())); }

  private:

  int _startIndex;
  int _length;
};

} // namespace diff
} // namespace quark

inline QDebug operator<<(QDebug dbg, const quark::diff::DiffRange& range)
{
  if(range.isValid())
  {
    dbg.nospace();
    if(!range.isEmpty())
      dbg << range.startIndex() << '-' << range.endIndex();
    else
      dbg << '@' << range.startIndex();
  }

  return(dbg);
}

#endif // __libquark_diff_DiffRange_hxx