/// <summary>
/// Creates a new bitmap by S-Step with a given item-bitmap.
/// </summary>
public Bitmap64 CreateNewBySStep(Bitmap64 itemBitmap)
{
// A new bitmap for S-Step will be create by ANDing transformed sequence-bitmap with item-bitmap.
// During creating a new bitmap also counts the support for a new bitmap.
var support = 0;
var newBitmaps = new ulong[_sequencesCount];
var itemBitmaps = itemBitmap._bitmaps;
for (var sid = 0; sid < _sequencesCount; ++sid)
{
if (_bitmaps[sid] == 0)
{
continue;
}
var tid = DeBruijn.FirstSetBit(_bitmaps[sid]);
if ((newBitmaps[sid] = (TransformedBitmap[tid] & itemBitmaps[sid])) == 0)
{
continue;
}
++support;
}
return(support > 0 ? new Bitmap64(newBitmaps, support) : null);
}
/// <summary>
/// Creates a new bitmap by I-Step with a given item-bitmap.
/// </summary>
public Bitmap64 CreateNewByIStep(Bitmap64 itemBitmap)
{
// A new bitmap for I-Step will be create by ANDing sequence-bitmap with item-bitmap.
// During creating a new bitmap also counts the support for a new bitmap.
var support = 0;
var newBitmaps = new ulong[_sequencesCount];
var itemBitmaps = itemBitmap._bitmaps;
for (var sid = 0; sid < _sequencesCount; ++sid)
{
if ((newBitmaps[sid] = (_bitmaps[sid] & itemBitmaps[sid])) == 0)
{
continue;
}
++support;
}
return(support > 0 ? new Bitmap64(newBitmaps, support) : null);
}
/// <summary>
/// Creates a new bitmap by S-Step with a given item-bitmap.
/// </summary>
public Bitmap64 CreateNewBySStep(Bitmap64 itemBitmap)
{
// A new bitmap for S-Step will be create by ANDing transformed sequence-bitmap with item-bitmap.
// During creating a new bitmap also counts the support for a new bitmap.
var support = 0;
var newBitmaps = new ulong[_sequencesCount];
var itemBitmaps = itemBitmap._bitmaps;
for (var sid = 0; sid < _sequencesCount; ++sid)
{
if (_bitmaps[sid] == 0) continue;
var tid = DeBruijn.FirstSetBit(_bitmaps[sid]);
if ((newBitmaps[sid] = (TransformedBitmap[tid] & itemBitmaps[sid])) == 0) continue;
++support;
}
return support > 0 ? new Bitmap64(newBitmaps, support) : null;
}
/// <summary>
/// Creates a new bitmap by I-Step with a given item-bitmap.
/// </summary>
public Bitmap64 CreateNewByIStep(Bitmap64 itemBitmap)
{
// A new bitmap for I-Step will be create by ANDing sequence-bitmap with item-bitmap.
// During creating a new bitmap also counts the support for a new bitmap.
var support = 0;
var newBitmaps = new ulong[_sequencesCount];
var itemBitmaps = itemBitmap._bitmaps;
for (var sid = 0; sid < _sequencesCount; ++sid)
{
if ((newBitmaps[sid] = (_bitmaps[sid] & itemBitmaps[sid])) == 0) continue;
++support;
}
return support > 0 ? new Bitmap64(newBitmaps, support) : null;
}