internal long OffsetToAbsolutePos(long offset)
{
if (_record.IsNonResident)
{
return(_record.OffsetToAbsolutePos(offset, 0, _file.Context.BiosParameterBlock.BytesPerCluster));
}
else
{
long attrStart = _file.GetAttributeOffset(new AttributeReference(_containingFile, _record.AttributeId));
long attrPos = _file.Context.GetFileByIndex(MasterFileTable.MftIndex).GetAttribute(AttributeType.Data, null).OffsetToAbsolutePos(attrStart);
return(_record.OffsetToAbsolutePos(offset, attrPos, 0));
}
}
public long MapPosition(long pos)
{
if (_attribute.IsNonResident)
{
return(((IMappedBuffer)_attribute.RawBuffer).MapPosition(pos));
}
else
{
AttributeReference attrRef = new AttributeReference(_file.MftReference, _attribute.PrimaryRecord.AttributeId);
ResidentAttributeRecord attrRecord = (ResidentAttributeRecord)_file.GetAttribute(attrRef).PrimaryRecord;
long attrStart = _file.GetAttributeOffset(attrRef);
long mftPos = attrStart + attrRecord.DataOffset + pos;
return(_file.Context.GetFileByIndex(MasterFileTable.MftIndex).GetAttribute(AttributeType.Data, null).OffsetToAbsolutePos(mftPos));
}
}