public int FillCache(LogFileStream logFileStream, int endindex)
{
if (endindex > FirstIndex + Items.Count)
{
return(-1);
}
int lastItem = Items.Count - 1;
for (int i = 0; i < Items.Count; i++)
{
if (FirstIndex + i > endindex)
{
lastItem = i - 1;
break;
}
if (Items[i] != null)
{
continue; // Already cached
}
if (i == 0)
{
// We are filling the cache
if (FillCacheEvent != null)
{
FillCacheEvent(this, null);
}
}
string line = logFileStream.ReadLine(FirstIndex + i + 1);
if (line == null)
{
lastItem = i - 1;
break;
}
Items[i] = new ListViewItem(line);
Items[i].SubItems.Add("");
}
// We are done filling the cache
if (FillCacheEvent != null)
{
FillCacheEvent(null, null);
}
if (lastItem != Items.Count - 1)
{
return(lastItem);
}
else
{
return(Items.Count - 1);
}
}
public int FillCache(LogFileStream logFileStream, int endindex)
{
if (endindex > FirstIndex + Items.Count)
return -1;
int lastItem = Items.Count - 1;
for (int i = 0; i < Items.Count; i++)
{
if (FirstIndex + i > endindex)
{
lastItem = i - 1;
break;
}
if (Items[i] != null)
continue; // Already cached
if (i == 0)
{
// We are filling the cache
if (FillCacheEvent != null)
FillCacheEvent(this, null);
}
string line = logFileStream.ReadLine(FirstIndex + i + 1);
if (line == null)
{
lastItem = i - 1;
break;
}
Items[i] = new ListViewItem(line);
Items[i].SubItems.Add("");
}
// We are done filling the cache
if (FillCacheEvent != null)
FillCacheEvent(null, null);
if (lastItem != Items.Count - 1)
return lastItem;
else
return Items.Count - 1;
}
public int FillTailCache(LogFileStream logFileStream)
{
int lineCount = 0;
// Quickly fast forward to near the file bottom
if (!logFileStream.CloseToEnd(Items.Count))
{
do
{
if (logFileStream.ReadLine(lineCount + 1) != null)
lineCount++;
// We have read a good part of the file
if (lineCount % Items.Count == 0)
{
if (LoadingFileEvent != null)
LoadingFileEvent(logFileStream, null);
}
}
while (!logFileStream.CloseToEnd(Items.Count));
// We are almost finished with loading the file
if (LoadingFileEvent != null)
LoadingFileEvent(null, null);
}
// Read the last lines of the file into the cache
bool continueReading = false;
PrepareCache(lineCount, lineCount, true);
do
{
int lastCacheIndex = FillCache(logFileStream, FirstIndex + Items.Count);
System.Diagnostics.Debug.Assert(lastCacheIndex != -1 || logFileStream.Length == 0);
continueReading = (lastCacheIndex == Items.Count - 1);
lineCount = FirstIndex + lastCacheIndex + 1;
if (continueReading)
PrepareCache(lineCount + Items.Count / 2, lineCount + Items.Count / 2, true);
} while (continueReading);
return lineCount;
}
