//Start Diff betwween two files parsed into 2 objects
public void StartDiff(CompareText source, CompareText dest)
{
if (source.Count() <= 0 && dest.Count() <= 0)
{
return;
}
//Save to Local vars for later use
sourceList = source;
destList = dest;
matchList = new ArrayList();
compareStateList = new CompareStateList(destList.Count());
RecursiveComparer(0, destList.Count() - 1, 0, sourceList.Count() - 1);
}
public ArrayList DiffResult()
{
ArrayList retval = new ArrayList();
int dcount = destList.Count();
int scount = sourceList.Count();
//Deal with the special case of empty files
if (dcount == 0)
{
if (scount > 0)
{
retval.Add(CompareResultSpan.CreateDeleteSource(0, scount));
}
return(retval);
}
if (scount == 0)
{
retval.Add(CompareResultSpan.CreateAddDestination(0, dcount));
return(retval);
}
matchList.Sort();
int curDest = 0;
int curSource = 0;
CompareResultSpan last = null;
//Process each match record
foreach (CompareResultSpan drs in matchList)
{
if ((!AddChanges(retval, curDest, drs.DestinationIndex, curSource, drs.SourceIndex)) &&
(last != null))
{
last.AddLength(drs.Length);
}
else
{
retval.Add(drs);
}
curDest = drs.DestinationIndex + drs.Length;
curSource = drs.SourceIndex + drs.Length;
last = drs;
}
//Process any tail end data
AddChanges(retval, curDest, dcount, curSource, scount);
return(retval);
}