internal static ulong GetMinOffset(ReferenceSequence refSeq, int begin)
{
int bin = BinUtilities.FirstBin(Constants.NumLevels) + (begin >> Constants.MinShift);
do
{
if (refSeq.IdToChunks.ContainsKey(bin))
{
break;
}
int firstBin = (BinUtilities.ParentBin(bin) << 3) + 1;
if (bin > firstBin)
{
bin--;
}
else
{
bin = BinUtilities.ParentBin(bin);
}
} while (bin != 0);
int bottomBin = BinUtilities.BottomBin(bin);
return(refSeq.LinearFileOffsets[bottomBin]);
}
internal static ulong GetMaxOffset(ReferenceSequence refSeq, int end)
{
int bin = BinUtilities.FirstBin(Constants.NumLevels) + ((end - 1) >> Constants.MinShift) + 1;
while (true)
{
while (bin % 8 == 1)
{
bin = BinUtilities.ParentBin(bin);
}
if (bin == 0)
{
return(ulong.MaxValue);
}
if (refSeq.IdToChunks.TryGetValue(bin, out var chunks) && chunks.Length > 0)
{
return(chunks[0].Begin);
}
bin++;
}
}