public static List <long> GetFileOffsets(string vcfUrl, int numPartitions, Tabix.Index tabixIndex)
{
long fileSize = HttpUtilities.GetLength(vcfUrl);
long[] sizeBasedOffsets = GetEqualSizeOffsets(fileSize, numPartitions);
return(GetBlockOffsets(sizeBasedOffsets, tabixIndex));
}
private static long[] GetAllLinearFileOffsets(Tabix.Index tabixIndex) => MergeConsecutiveEqualValues(tabixIndex.ReferenceSequences.SelectMany(x => x.LinearFileOffsets.Select(y => VirtualPosition.From((long)y).FileOffset))).ToArray();
private static List <long> GetBlockOffsets(long[] sizeBasedOffsets, Tabix.Index tabixIndex)
{
long[] allLinearOffsets = GetAllLinearFileOffsets(tabixIndex);
return(FindEqualOrClosestSmallerOffsets(sizeBasedOffsets, allLinearOffsets));
}