public DiffState GetByIndex(int index)
{
#if USE_HASH_TABLE
DiffState retval = (DiffState)_table[index];
if (retval == null)
{
retval = new DiffState();
_table.Add(index,retval);
}
#else
DiffState retval = _array[index];
if (retval == null)
{
retval = new DiffState();
_array[index] = retval;
}
#endif
return retval;
}
private void GetLongestSourceMatch(DiffState curItem, int destIndex, int destEnd, int sourceStart, int sourceEnd)
{
int maxDestLength = (destEnd - destIndex) + 1;
int curLength = 0;
int curBestLength = 0;
int curBestIndex = -1;
int maxLength = 0;
for (int sourceIndex = sourceStart; sourceIndex <= sourceEnd; sourceIndex++)
{
maxLength = Math.Min(maxDestLength, (sourceEnd - sourceIndex) + 1);
if (maxLength <= curBestLength)
{
//No chance to find a longer one any more
break;
}
curLength = GetSourceMatchLength(destIndex, sourceIndex, maxLength);
if (curLength > curBestLength)
{
//This is the best match so far
curBestIndex = sourceIndex;
curBestLength = curLength;
}
//jump over the match
sourceIndex += curBestLength;
}
//DiffState cur = _stateList.GetByIndex(destIndex);
if (curBestIndex == -1)
{
curItem.SetNoMatch();
}
else
{
curItem.SetMatch(curBestIndex, curBestLength);
}
}